* [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver
@ 2015-10-27 18:15 Jakub Kicinski
2015-10-27 18:15 ` [PATCHv2 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski
` (3 more replies)
0 siblings, 4 replies; 17+ messages in thread
From: Jakub Kicinski @ 2015-10-27 18:15 UTC (permalink / raw)
To: David Miller
Cc: netdev, rolf.neugebauer, jason.mcmullan, simon.horman, Jakub Kicinski
This patchset adds support for VFs of Netronome's NFP-4000 and NFP-6000
based NICs. We are currently also preparing the submission for the PF
driver, but it is not quite ready yet. The PF driver can be found on
GitHub:
https://github.com/Netronome/nfp-drv-kmods
changes since v1:
- reorganize struct nfp_net_r_vector
Jakub Kicinski (2):
pci_ids: add Netronome Systems vendor
net: add driver for Netronome NFP4000/NFP6000 NIC VFs
MAINTAINERS | 7 +
drivers/net/ethernet/Kconfig | 1 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/netronome/Kconfig | 33 +
drivers/net/ethernet/netronome/Makefile | 5 +
drivers/net/ethernet/netronome/nfp/Makefile | 8 +
drivers/net/ethernet/netronome/nfp/nfp_net.h | 755 ++++++
.../net/ethernet/netronome/nfp/nfp_net_common.c | 2523 ++++++++++++++++++++
drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 318 +++
.../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++
.../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 704 ++++++
.../net/ethernet/netronome/nfp/nfp_netvf_main.c | 404 ++++
include/linux/pci_ids.h | 2 +
13 files changed, 4996 insertions(+)
create mode 100644 drivers/net/ethernet/netronome/Kconfig
create mode 100644 drivers/net/ethernet/netronome/Makefile
create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
--
1.9.1
^ permalink raw reply [flat|nested] 17+ messages in thread* [PATCHv2 1/2] pci_ids: add Netronome Systems vendor 2015-10-27 18:15 [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski @ 2015-10-27 18:15 ` Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski ` (2 subsequent siblings) 3 siblings, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-10-27 18:15 UTC (permalink / raw) To: David Miller Cc: netdev, rolf.neugebauer, jason.mcmullan, simon.horman, Jakub Kicinski Add PCI vendor id for Netronome Systems. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- include/linux/pci_ids.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index d9ba49cedc5d..1acbefc4bbda 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2495,6 +2495,8 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF2 0x1700 #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff +#define PCI_VENDOR_ID_NETRONOME 0x19ee + #define PCI_VENDOR_ID_QMI 0x1a32 #define PCI_VENDOR_ID_AZWAVE 0x1a3b -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-10-27 18:15 [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski @ 2015-10-27 18:15 ` Jakub Kicinski 2015-10-30 10:27 ` David Miller 2015-11-25 15:39 ` [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 3 siblings, 1 reply; 17+ messages in thread From: Jakub Kicinski @ 2015-10-27 18:15 UTC (permalink / raw) To: David Miller Cc: netdev, rolf.neugebauer, jason.mcmullan, simon.horman, Jakub Kicinski Add driver for Virtual Functions for the Netronome's NFP-4000 and NFP-6000 based NICs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jason S. McMullan <jason.mcmullan@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- Since I had to repost I cleaned a few small things: - added explicit include for interrupt.h to nfp_net.h (we were depending on pci.h including it for us); - fixed lack of semicolons in kdoc which I previously missed; - reorganized struct nfp_net_r_vector since it was the one with most packing potential and also it mixed cache hot and cache cold members a bit. MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 33 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 755 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2523 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 318 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 704 ++++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 404 ++++ 12 files changed, 4994 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c diff --git a/MAINTAINERS b/MAINTAINERS index fb8603e2a3f3..6e9c1a1eecc5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7232,6 +7232,13 @@ F: include/net/netrom.h F: include/uapi/linux/netrom.h F: net/netrom/ +NETRONOME ETHERNET DRIVERS +M: Jakub Kicinski <jakub.kicinski@netronome.com> +M: Rolf Neugebauer <rolf.neugebauer@netronome.com> +L: oss-drivers@netronome.com +S: Maintained +F: drivers/net/ethernet/netronome/ + NETWORK BLOCK DEVICE (NBD) M: Markus Pargmann <mpa@pengutronix.de> S: Maintained diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 05aa7597dab9..64e4056530ed 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -122,6 +122,7 @@ config FEALNX cards. <http://www.myson.com.tw/> source "drivers/net/ethernet/natsemi/Kconfig" +source "drivers/net/ethernet/netronome/Kconfig" source "drivers/net/ethernet/8390/Kconfig" config NET_NETX diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index ddfc808110a1..0bc9e166d9ca 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -53,6 +53,7 @@ obj-$(CONFIG_NET_VENDOR_MOXART) += moxa/ obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/ obj-$(CONFIG_FEALNX) += fealnx.o obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/ +obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/ obj-$(CONFIG_NET_NETX) += netx-eth.o obj-$(CONFIG_NET_VENDOR_NUVOTON) += nuvoton/ obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/ diff --git a/drivers/net/ethernet/netronome/Kconfig b/drivers/net/ethernet/netronome/Kconfig new file mode 100644 index 000000000000..9d2277a3d2f4 --- /dev/null +++ b/drivers/net/ethernet/netronome/Kconfig @@ -0,0 +1,33 @@ +# +# Netronome device configuration +# + +config NET_VENDOR_NETRONOME + bool "Netronome(R) devices" + default y + ---help--- + If you have a Netronome(R) network (Ethernet) card or device, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Netronome(R) cards. If you say Y, you will be + asked for your specific card in the following questions. + +if NET_VENDOR_NETRONOME + +config NFP_NETVF + tristate "Netronome(R) NFP4000/NFP6000 VF NIC driver" + depends on PCI && PCI_MSI + ---help--- + This driver supports SR-IOV virtual functions of + the Netronome(R) NFP4000/NFP6000 cards working as + a advanced Ethernet NIC. + +config NFP_NET_DEBUG + bool "Debug support for Netronome(R) NFP4000/NFP6000 NIC drivers" + depends on NFP_NETVF + ---help--- + Enable debugfs support, debug messages and extra sanity checks + in Netronome(R) NFP4000/NFP6000 NIC drivers. + +endif diff --git a/drivers/net/ethernet/netronome/Makefile b/drivers/net/ethernet/netronome/Makefile new file mode 100644 index 000000000000..dcb7b383f634 --- /dev/null +++ b/drivers/net/ethernet/netronome/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Netronome network device drivers +# + +obj-$(CONFIG_NFP_NETVF) += nfp/ diff --git a/drivers/net/ethernet/netronome/nfp/Makefile b/drivers/net/ethernet/netronome/nfp/Makefile new file mode 100644 index 000000000000..68178819ff12 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/Makefile @@ -0,0 +1,8 @@ +obj-$(CONFIG_NFP_NETVF) += nfp_netvf.o + +nfp_netvf-objs := \ + nfp_net_common.o \ + nfp_net_ethtool.o \ + nfp_netvf_main.o + +nfp_netvf-$(CONFIG_NFP_NET_DEBUG) += nfp_net_debugfs.o diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h new file mode 100644 index 000000000000..e262fe861ea4 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -0,0 +1,755 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net.h + * Declarations for Netronome network device driver. + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#ifndef _NFP_NET_H_ +#define _NFP_NET_H_ + +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <asm-generic/io-64-nonatomic-hi-lo.h> + +#include "nfp_net_ctrl.h" + +#ifdef CONFIG_NFP_NET_DEBUG +#define DEBUG +#endif + +#define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args) +#define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args) +#define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_warn_ratelimit(nn, fmt, args...) \ + do { \ + if (unlikely(net_ratelimit())) \ + netdev_warn((nn)->netdev, fmt, ## args); \ + } while (0) + +#ifdef CONFIG_NFP_NET_DEBUG +#define nn_dbg(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_assert(cond, fmt, args...) \ + do { \ + if (unlikely(!(cond))) { \ + pr_err("assertion %s failed: %s:%d\n", \ + #cond, __func__, __LINE__); \ + pr_err(fmt, ## args); \ + BUG(); \ + } \ + } while (0) +#else +#define nn_dbg(nn, fmt, args...) do { } while (0) +#define nn_assert(cond, fmt, args...) do { } while (0) +#endif + +/* NAPI weight */ +#define NFP_NET_NAPI_WEIGHT 64 + +/* Max time to wait for NFP to respond on updates (in ms) */ +#define NFP_NET_POLL_TIMEOUT 5000 + +/* Bar allocation */ +#define NFP_NET_CRTL_BAR 0 +#define NFP_NET_Q0_BAR 2 +#define NFP_NET_Q1_BAR 4 /* OBSOLETE */ + +/* Max bits in DMA address */ +#define NFP_NET_MAX_DMA_BITS 40 + +/* Default size for MTU and freelist buffer sizes */ +#define NFP_NET_DEFAULT_MTU 1500 +#define NFP_NET_DEFAULT_RX_BUFSZ 2048 + +/* Maximum number of bytes prepended to a packet */ +#define NFP_NET_MAX_PREPEND 64 + +/* Interrupt definitions */ +#define NFP_NET_NON_Q_VECTORS 2 +#define NFP_NET_IRQ_LSC_IDX 0 +#define NFP_NET_IRQ_EXN_IDX 1 + +/* Queue/Ring definitions */ +#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ +#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ + +#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ +#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ +#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ +#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ + +#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ +#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ + +#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ + +/* Offload definitions */ +#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) + +/* Workaround definitions */ +#define NFP_NET_FL_KICK_BATCH 32 /* FW buffer consumption batch size */ + +/* Forward declarations */ +struct nfp_net; +struct nfp_net_r_vector; + +/* Convenience macro for writing dma address into RX/TX descriptors */ +#define nfp_desc_set_dma_addr(desc, dma_addr) \ + do { \ + __typeof(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ + __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ + } while (0) + +/* TX descriptor format */ + +#define PCIE_DESC_TX_EOP BIT(7) +#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) + +/* Flags in the host TX descriptor */ +#define PCIE_DESC_TX_CSUM BIT(7) +#define PCIE_DESC_TX_IP4_CSUM BIT(6) +#define PCIE_DESC_TX_TCP_CSUM BIT(5) +#define PCIE_DESC_TX_UDP_CSUM BIT(4) +#define PCIE_DESC_TX_VLAN BIT(3) +#define PCIE_DESC_TX_LSO BIT(2) +#define PCIE_DESC_TX_ENCAP_VXLAN BIT(1) +#define PCIE_DESC_TX_ENCAP_NVGRE BIT(0) +#define PCIE_DESC_TX_ENCAP_NONE 0 + +struct nfp_net_tx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of host buf address */ + __le16 dma_len; /* Length to DMA for this desc */ + u8 offset_eop; /* Offset in buf where pkt starts + + * highest bit is eop flag. + */ + __le32 dma_addr_lo; /* Low 32bit of host buf addr */ + + __le16 lso; /* MSS to be used for LSO */ + u8 l4_offset; /* LSO, where the L4 data starts */ + u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ + + __le16 vlan; /* VLAN tag to add if indicated */ + __le16 data_len; /* Length of frame + meta data */ + } __packed; + __le32 vals[4]; + }; +}; + +/** + * struct nfp_net_tx_buf - software TX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) + * @pkt_cnt: Number of packets to be produced out of the skb associated + * with this buffer (valid only on the head's buffer). + * Will be 1 for all non-TSO packets. + * @real_len: Number of bytes which to be produced out of the skb (valid only + * on the head's buffer). Equal to skb->len for non-TSO packets. + */ +struct nfp_net_tx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; + short int fidx; + u16 pkt_cnt; + u32 real_len; +}; + +/** + * struct nfp_net_tx_ring - TX ring structure + * @r_vec: Back pointer to ring vector structure + * @idx: Ring index from Linux's perspective + * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue + * @qcp_q: Pointer to base of the QCP TX queue + * @cnt: Size of the queue in number of descriptors + * @wr_p: TX ring write pointer (free running) + * @rd_p: TX ring read pointer (free running) + * @qcp_rd_p: Local copy of QCP TX queue read pointer + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for .xmit_more delayed kick) + * @txbufs: Array of transmitted TX buffers, to free on transmit + * @txds: Virtual address of TX ring in host memory + * @dma: DMA address of the TX ring + * @size: Size, in bytes, of the TX ring (needed to free) + */ +struct nfp_net_tx_ring { + struct nfp_net_r_vector *r_vec; + + int idx; + int qcidx; + u8 __iomem *qcp_q; + + int cnt; + u32 wr_p; + u32 rd_p; + u32 qcp_rd_p; + + u32 wr_ptr_add; + + struct nfp_net_tx_buf *txbufs; + struct nfp_net_tx_desc *txds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/* RX and freelist descriptor format */ + +#define PCIE_DESC_RX_DD BIT(7) +#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) + +/* Flags in the RX descriptor */ +#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) +#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) +#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) +#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) +#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) +#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) +#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) +#define PCIE_DESC_RX_SPARE cpu_to_le16(BIT(8)) +#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) +#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) +#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) +#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) +#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) +#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) +#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) +#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) + +#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ + PCIE_DESC_RX_TCP_CSUM | \ + PCIE_DESC_RX_UDP_CSUM | \ + PCIE_DESC_RX_I_IP4_CSUM | \ + PCIE_DESC_RX_I_TCP_CSUM | \ + PCIE_DESC_RX_I_UDP_CSUM) +#define PCIE_DESC_RX_CSUM_OK_SHIFT 1 +#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) +#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ + PCIE_DESC_RX_CSUM_OK_SHIFT) + +struct nfp_net_rx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of the buf address */ + __le16 padding; + u8 meta_len_dd; /* Must be zero */ + + __le32 dma_addr_lo; /* Low bits of the buffer address */ + } __packed fld; + + struct { + __le16 data_len; /* Length of the frame + meta data */ + u8 reserved; + u8 meta_len_dd; /* Length of meta data prepended + + * descriptor done flag. + */ + + __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ + __le16 vlan; /* VLAN if stripped */ + } __packed rxd; + + __le32 vals[2]; + }; +}; + +struct nfp_net_rx_hash { + __be32 hash_type; + __be32 hash; +}; + +/** + * struct nfp_net_rx_ring - RX ring structure + * @r_vec: Back pointer to ring vector structure + * @cnt: Size of the queue in number of descriptors + * @wr_p: FL/RX ring write pointer (free running) + * @rd_p: FL/RX ring read pointer (free running) + * @idx: Ring index from Linux's perspective + * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist + * @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue + * @qcp_fl: Pointer to base of the QCP freelist queue + * @qcp_rx: Pointer to base of the QCP RX queue + * @rxbufs: Array of transmitted FL/RX buffers + * @rxds: Virtual address of FL/RX ring in host memory + * @dma: DMA address of the FL/RX ring + * @size: Size, in bytes, of the FL/RX ring (needed to free) + */ +struct nfp_net_rx_ring { + struct nfp_net_r_vector *r_vec; + + int cnt; + u32 wr_p; + u32 rd_p; + + int idx; + int fl_qcidx; + int rx_qcidx; + u8 __iomem *qcp_fl; + u8 __iomem *qcp_rx; + + struct { + struct sk_buff *skb; + dma_addr_t dma_addr; + } *rxbufs; + + struct nfp_net_rx_desc *rxds; + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/** + * enum nfp_net_r_vector_flags - Flags for flags field of nfp_net_r_vector + * @NFP_NET_RVEC_IRQ_REQUESTED: IRQ vector has been requested + * @NFP_NET_RVEC_NAPI_STARTED: Called napi_enable() for this vector + */ +enum nfp_net_r_vector_flags { + NFP_NET_RVEC_IRQ_REQUESTED = 0, + NFP_NET_RVEC_NAPI_STARTED, +}; + +/** + * struct nfp_net_r_vector - Per ring interrupt vector configuration + * @nfp_net: Backpointer to nfp_net structure + * @napi: NAPI structure for this ring vec + * @flags: Flags, see enum nfp_net_r_vector_flags + * @tx_ring: Pointer to TX ring + * @rx_ring: Pointer to RX ring + * @idx: Index of this ring vector + * @irq_idx: Index into MSI-X table + * @rx_sync: Seqlock for atomic updates of RX stats + * @rx_pkts: Number of received packets + * @rx_bytes: Number of received bytes + * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK + * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK + * @hw_csum_rx_error: Counter of packets with bad checksums + * @tx_sync: Seqlock for atomic updates of TX stats + * @tx_pkts: Number of Transmitted packets + * @tx_bytes: Number of Transmitted bytes + * @hw_csum_tx: Counter of packets with TX checksum offload requested + * @hw_csum_tx_inner: Counter of inner TX checksum offload requests + * @tx_gather: Counter of packets with Gather DMA + * @tx_lso: Counter of LSO packets sent + * @tx_errors: How many TX errors were encountered + * @tx_busy: How often was TX busy (no space)? + * @handler: Interrupt handler for this ring vector + * @name: Name of the interrupt vector + * @affinity_mask: SMP affinity mask for this vector + * + * This structure ties RX and TX rings to interrupt vectors and a NAPI + * context. This currently only supports one RX and TX ring per + * interrupt vector but might be extended in the future to allow + * association of multiple rings per vector. + */ +struct nfp_net_r_vector { + struct nfp_net *nfp_net; + struct napi_struct napi; + unsigned long flags; + + struct nfp_net_tx_ring *tx_ring; + struct nfp_net_rx_ring *rx_ring; + + int idx; + int irq_idx; + + struct u64_stats_sync rx_sync; + u64 rx_pkts; + u64 rx_bytes; + u64 hw_csum_rx_ok; + u64 hw_csum_rx_inner_ok; + u64 hw_csum_rx_error; + + struct u64_stats_sync tx_sync; + u64 tx_pkts; + u64 tx_bytes; + u64 hw_csum_tx; + u64 hw_csum_tx_inner; + u64 tx_gather; + u64 tx_lso; + u64 tx_errors; + u64 tx_busy; + + irq_handler_t handler; + char name[IFNAMSIZ + 8]; + cpumask_t affinity_mask; +} ____cacheline_aligned; + +/** + * struct nfp_net - NFP network device structure + * @pdev: Backpointer to PCI device + * @netdev: Backpointer to net_device structure + * @nfp_fallback: Is the driver used in fallback mode? + * @is_vf: Is the driver attached to a VF? + * @is_nfp3200: Is the driver for a NFP-3200 card? + * @removing_pdev: Are we in the process of removing the device driver + * @link_up: Is the link up? + * @fw_loaded: Is the firmware loaded? + * @ctrl: Local copy of the control register/word. + * @fl_bufsz: Currently configured size of the freelist buffers + * @rx_offset: Offset in the RX buffers where packet data starts + * @cpp: Pointer to the CPP handle + * @nfp_dev_cpp: Pointer to the NFP Device handle + * @ctrl_area: Pointer to the CPP area for the control BAR + * @tx_area: Pointer to the CPP area for the TX queues + * @rx_area: Pointer to the CPP area for the FL/RX queues + * @ver: Firmware version + * @cap: Capabilities advertised by the Firmware + * @max_mtu: Maximum support MTU advertised by the Firmware + * @rss_cfg: RSS configuration + * @rss_key: RSS secret key + * @rss_itbl: RSS indirection table + * @max_tx_rings: Maximum number of TX rings supported by the Firmware + * @max_rx_rings: Maximum number of RX rings supported by the Firmware + * @num_tx_rings: Currently configured number of TX rings + * @num_rx_rings: Currently configured number of RX rings + * @txd_cnt: Size of the TX ring in number of descriptors + * @rxd_cnt: Size of the RX ring in number of descriptors + * @tx_rings: Array of pre-allocated TX ring structures + * @rx_rings: Array of pre-allocated RX ring structures + * @per_vector_masking: Are we using per vector masking? + * @msix_table: Pointer to mapped MSI-X table + * @num_irqs: Number of allocated interrupt vectors + * @num_r_vecs: Number of used ring vectors + * @r_vecs: Pre-allocated array of ring vectors + * @irq_entries: Pre-allocated array of MSI-X entries + * @lsc_handler: Handler for Link State Change interrupt + * @lsc_name: Name for Link State Change interrupt + * @exn_handler: Handler for Exception interrupt + * @exn_name: Name for Exception interrupt + * @shared_handler: Handler for shared interrupts + * @shared_name: Name for shared interrupt + * @me_freq_mhz: ME clock_freq (MHz) + * @reconfig_lock: Protects HW reconfiguration request regs/machinery + * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter + * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter + * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter + * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter + * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW + * @qcp_cfg: Pointer to QCP queue used for configuration notification + * @ctrl_bar: Pointer to mapped control BAR + * @tx_bar: Pointer to mapped TX queues + * @rx_bar: Pointer to mapped FL/RX queues + * @debugfs_dir: Device directory in debugfs + */ +struct nfp_net { + struct pci_dev *pdev; + struct net_device *netdev; + + unsigned nfp_fallback:1; + unsigned is_vf:1; + unsigned is_nfp3200:1; + unsigned removing_pdev:1; + unsigned link_up:1; + unsigned fw_loaded:1; + + u32 ctrl; + u32 fl_bufsz; + + u32 rx_offset; + +#ifdef CONFIG_PCI_IOV + unsigned int num_vfs; + struct vf_data_storage *vfinfo; + int vf_rate_link_speed; +#endif + + struct nfp_cpp *cpp; + struct platform_device *nfp_dev_cpp; + struct nfp_cpp_area *ctrl_area; + struct nfp_cpp_area *tx_area; + struct nfp_cpp_area *rx_area; + + u32 ver; + u32 cap; + u32 max_mtu; + + u32 rss_cfg; + u32 rss_key[NFP_NET_CFG_RSS_KEY_SZ / sizeof(u32)]; + u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; + + int max_tx_rings; + int max_rx_rings; + + int num_tx_rings; + int num_rx_rings; + + int stride_tx; + int stride_rx; + + int txd_cnt; + int rxd_cnt; + + struct nfp_net_tx_ring tx_rings[NFP_NET_MAX_TX_RINGS]; + struct nfp_net_rx_ring rx_rings[NFP_NET_MAX_RX_RINGS]; + + unsigned per_vector_masking:1; + u8 __iomem *msix_table; + u8 num_irqs; + u8 num_r_vecs; + struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS]; + struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS + + NFP_NET_MAX_TX_RINGS]; + + irq_handler_t lsc_handler; + char lsc_name[IFNAMSIZ + 8]; + + irq_handler_t exn_handler; + char exn_name[IFNAMSIZ + 8]; + + irq_handler_t shared_handler; + char shared_name[IFNAMSIZ + 8]; + + u32 me_freq_mhz; + + spinlock_t reconfig_lock; + + u32 rx_coalesce_usecs; + u32 rx_coalesce_max_frames; + u32 tx_coalesce_usecs; + u32 tx_coalesce_max_frames; + + __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; + + u8 __iomem *qcp_cfg; + + u8 __iomem *ctrl_bar; + u8 __iomem *q_bar; + u8 __iomem *tx_bar; + u8 __iomem *rx_bar; + + struct dentry *debugfs_dir; +}; + +/* Functions to read/write from/to a BAR + * Performs any endian conversion necessary. + */ +static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) +{ + writeb(val, nn->ctrl_bar + off); +} + +/* NFP-3200 can't handle 16-bit accesses too well - hence no readw/writew */ + +static inline u32 nn_readl(struct nfp_net *nn, int off) +{ + return readl(nn->ctrl_bar + off); +} + +static inline void nn_writel(struct nfp_net *nn, int off, u32 val) +{ + writel(val, nn->ctrl_bar + off); +} + +static inline u64 nn_readq(struct nfp_net *nn, int off) +{ + return readq(nn->ctrl_bar + off); +} + +static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) +{ + writeq(val, nn->ctrl_bar + off); +} + +/* Flush posted PCI writes by reading something without side effects */ +static inline void nn_pci_flush(struct nfp_net *nn) +{ + nn_readl(nn, NFP_NET_CFG_VERSION); +} + +/* Queue Controller Peripheral access functions and definitions. + * + * Some of the BARs of the NFP are mapped to portions of the Queue + * Controller Peripheral (QCP) address space on the NFP. A QCP queue + * has a read and a write pointer (as well as a size and flags, + * indicating overflow etc). The QCP offers a number of different + * operation on queue pointers, but here we only offer function to + * either add to a pointer or to read the pointer value. + */ +#define NFP_QCP_QUEUE_ADDR_SZ 0x800 +#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) +#define NFP_QCP_QUEUE_ADD_RPTR 0x0000 +#define NFP_QCP_QUEUE_ADD_WPTR 0x0004 +#define NFP_QCP_QUEUE_STS_LO 0x0008 +#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff +#define NFP_QCP_QUEUE_STS_HI 0x000c +#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff + +/* The offset of a QCP queues in the PCIe Target (same on NFP3200 and NFP6000 */ +#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) + +/* nfp_qcp_ptr - Read or Write Pointer of a queue */ +enum nfp_qcp_ptr { + NFP_QCP_READ_PTR = 0, + NFP_QCP_WRITE_PTR +}; + +/* There appear to be an *undocumented* upper limit on the value which + * one can add to a queue and that value is either 0x3f or 0x7f. We + * go with 0x3f as a conservative measure. + */ +#define NFP_QCP_MAX_ADD 0x3f + +static inline void _nfp_qcp_ptr_add(u8 __iomem *q, + enum nfp_qcp_ptr ptr, u32 val) +{ + u32 off; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_ADD_RPTR; + else + off = NFP_QCP_QUEUE_ADD_WPTR; + + while (val > NFP_QCP_MAX_ADD) { + writel(NFP_QCP_MAX_ADD, q + off); + val -= NFP_QCP_MAX_ADD; + } + + writel(val, q + off); +} + +/** + * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); +} + +/** + * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); +} + +static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) +{ + u32 off; + u32 val; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_STS_LO; + else + off = NFP_QCP_QUEUE_STS_HI; + + val = readl(q + off); + + if (ptr == NFP_QCP_READ_PTR) + return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; + else + return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; +} + +/** + * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_READ_PTR); +} + +/** + * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); +} + +/* Globals */ +extern const char nfp_net_driver_name[]; +extern const char nfp_net_driver_version[]; + +/* Prototypes */ +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings); +void nfp_net_netdev_free(struct nfp_net *nn); +int nfp_net_netdev_init(struct net_device *netdev); +void nfp_net_netdev_clean(struct net_device *netdev); +void nfp_net_set_ethtool_ops(struct net_device *netdev); +void nfp_net_info(struct nfp_net *nn); +int nfp_net_reconfig(struct nfp_net *nn, u32 update); +void nfp_net_rss_write_itbl(struct nfp_net *nn); +void nfp_net_coalesce_write_cfg(struct nfp_net *nn); +int nfp_net_irqs_alloc(struct nfp_net *nn); +void nfp_net_irqs_disable(struct nfp_net *nn); +void __iomem *nfp_net_msix_map(struct pci_dev *pdev, unsigned nr_entries); + +#ifdef CONFIG_NFP_NET_DEBUG +void nfp_net_debugfs_create(void); +void nfp_net_debugfs_destroy(void); +void nfp_net_debugfs_adapter_add(struct nfp_net *nn); +void nfp_net_debugfs_adapter_del(struct nfp_net *nn); +#else +static inline void nfp_net_debugfs_create(void) +{ +} + +static inline void nfp_net_debugfs_destroy(void) +{ +} + +static inline void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ +} + +static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ +} +#endif /* CONFIG_NFP_NET_DEBUG */ + +#endif /* _NFP_NET_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c new file mode 100644 index 000000000000..8766b81ee99c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -0,0 +1,2523 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_common.c + * Netronome network device driver: Common functions between PF and VF + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + * Chris Telfer <chris.telfer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/ethtool.h> +#include <linux/log2.h> +#include <linux/if_vlan.h> +#include <linux/random.h> + +#include <linux/ktime.h> + +#include <net/vxlan.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/** + * nfp_net_reconfig() - Reconfigure the firmware + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Write the update word to the BAR and ping the reconfig queue. The + * poll until the firmware has acknowledged the update by zeroing the + * update word. + * + * Return: Negative errno on error, 0 on success + */ +int nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int cnt, ret = 0; + u32 new; + + spin_lock_bh(&nn->reconfig_lock); + + nn_writel(nn, NFP_NET_CFG_UPDATE, update); + /* ensure update is written before pinging HW */ + nn_pci_flush(nn); + nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); + + /* Poll update field, waiting for NFP to ack the config */ + for (cnt = 0; ; cnt++) { + new = nn_readl(nn, NFP_NET_CFG_UPDATE); + if (new == 0) + break; + if (new & NFP_NET_CFG_UPDATE_ERR) { + nn_err(nn, "Reconfig error: 0x%08x\n", new); + ret = -EIO; + break; + } else if (cnt >= NFP_NET_POLL_TIMEOUT) { + nn_err(nn, "Reconfig timeout for 0x%08x after %dms\n", + update, cnt); + ret = -EIO; + break; + } + mdelay(1); + } + + spin_unlock_bh(&nn->reconfig_lock); + return ret; +} + +/** + * nfp_net_msix_map() - Map the MSI-X table + * @pdev: PCI Device structure + * @nr_entries: Number of entries in table to map + * + * If successful, the table must be un-mapped using iounmap(). + * + * Return: Pointer to mapped table or NULL + */ +void __iomem *nfp_net_msix_map(struct pci_dev *pdev, unsigned nr_entries) +{ + resource_size_t phys_addr; + u32 table_offset; + u8 msix_cap; + u8 bir; + + msix_cap = pdev->msix_cap; + + pci_read_config_dword(pdev, msix_cap + PCI_MSIX_TABLE, + &table_offset); + + bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR); + table_offset &= PCI_MSIX_TABLE_OFFSET; + + phys_addr = pci_resource_start(pdev, bir) + table_offset; + + return ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE); +} + +/* Interrupt configuration and handling + */ + +/** + * nfp_net_irq_unmask() - Unmask an interrupt + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * If MSI-X auto-masking is enabled clear the mask bit, otherwise + * clear the ICR for the entry. + */ +static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) +{ + struct pci_dev *pdev = nn->pdev; + int off; + + if (!pdev->msix_enabled) + return; + + if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) { + /* If MSI-X auto-masking is used, clear the entry */ + off = (PCI_MSIX_ENTRY_SIZE * entry_nr) + + PCI_MSIX_ENTRY_VECTOR_CTRL; + writel(0, nn->msix_table + off); + } else { + nn_writeb(nn, + NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); + } +} + +/** + * nfp_net_msix_alloc() - Try to allocate MSI-X irqs + * @nn: NFP Network structure + * @nr_vecs: Number of MSI-X vectors to allocate + * + * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. + * + * Return: Number of MSI-X vectors obtained or 0 on error. + */ +static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) +{ + struct pci_dev *pdev = nn->pdev; + int nvecs; + int i; + + for (i = 0; i < nr_vecs; i++) + nn->irq_entries[i].entry = i; + + nvecs = pci_enable_msix_range(pdev, nn->irq_entries, + NFP_NET_NON_Q_VECTORS + 1, nr_vecs); + if (nvecs < 0) { + nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", + NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); + return 0; + } + + nn->per_vector_masking = 1; + + return nvecs; +} + +/** + * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want + * @nn: NFP Network structure + * + * We want a vector per CPU (or ring), whatever is smaller plus + * NFP_NET_NON_Q_VECTORS for LSC etc. + * + * Return: Number of interrupts wanted + */ +static int nfp_net_irqs_wanted(struct nfp_net *nn) +{ + int ncpus; + int vecs; + + ncpus = num_online_cpus(); + + vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); + vecs = min_t(int, vecs, ncpus); + + return vecs + NFP_NET_NON_Q_VECTORS; +} + +/** + * nfp_net_irqs_alloc() - allocates MSI-X irqs + * @nn: NFP Network structure + * + * Return: Number of irqs obtained or 0 on error. + */ +int nfp_net_irqs_alloc(struct nfp_net *nn) +{ + int wanted_irqs; + + wanted_irqs = nfp_net_irqs_wanted(nn); + + nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); + if (nn->num_irqs == 0) { + nn_err(nn, "Failed to allocate MSI-X IRQs\n"); + return 0; + } + + nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; + + if (nn->num_irqs < wanted_irqs) + nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", + wanted_irqs, nn->num_irqs); + + return nn->num_irqs; +} + +/** + * nfp_net_irqs_disable() - Disable interrupts + * @nn: NFP Network structure + * + * Undoes what @nfp_net_irqs_alloc() does. + */ +void nfp_net_irqs_disable(struct nfp_net *nn) +{ + if (nn->pdev->msix_enabled) + pci_disable_msix(nn->pdev); +} + +/** + * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + struct napi_struct *napi = &r_vec->napi; + + if (!r_vec->rx_ring && !r_vec->tx_ring) + return IRQ_HANDLED; + + /* The FW auto-masks any interrupt, either via the MASK bit in + * the MSI-X table or via the per entry ICR field. So there + * is no need to disable interrupts here. + */ + + /* There is a short period between enabling interrupts and + * enabling NAPI. If a interrupt gets delivered during this + * period, NAPI will not get scheduled and the auto-masked + * interrupt will never get un-masked. Handle this case here. + */ + if (unlikely(!test_bit(NFP_NET_RVEC_NAPI_STARTED, &r_vec->flags))) { + nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_idx); + return IRQ_HANDLED; + } + + napi_schedule(napi); + + return IRQ_HANDLED; +} + +static void nfp_net_print_link(struct nfp_net *nn, bool isup) +{ + if (isup) + netdev_info(nn->netdev, "NIC Link is Up\n"); + else + netdev_info(nn->netdev, "NIC Link is Down\n"); +} + +/** + * nfp_net_irq_lsc() - Interrupt service routine for link state changes + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_lsc(int irq, void *data) +{ + struct net_device *netdev = data; + struct nfp_net *nn = netdev_priv(netdev); + bool link_up; + u32 sts; + + sts = nn_readl(nn, NFP_NET_CFG_STS); + link_up = !!(sts & NFP_NET_CFG_STS_LINK); + + if (nn->link_up == link_up) + goto unmask_lsc_irq; + + nn->link_up = link_up; + + if (nn->link_up) + netif_carrier_on(netdev); + else + netif_carrier_off(netdev); + + nfp_net_print_link(nn, sts & NFP_NET_CFG_STS_LINK); + +unmask_lsc_irq: + nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); + + return IRQ_HANDLED; +} + +/** + * nfp_net_irq_exn() - Interrupt service routine for exceptions + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_exn(int irq, void *data) +{ + struct net_device *netdev = data; + struct nfp_net *nn = netdev_priv(netdev); + + nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); + /* XXX TO BE IMPLEMENTED */ + return IRQ_HANDLED; +} + +/** + * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring + * @tx_ring: TX ring structure + */ +static void nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + tx_ring->qcidx = tx_ring->idx * nn->stride_tx; + tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); +} + +/** + * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring + * @rx_ring: RX ring structure + */ +static void nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; + rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); + + rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); + rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); +} + +/** + * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. + * @netdev: netdev structure + */ +static void nfp_net_irqs_assign(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct nfp_net_r_vector *r_vec; + int i, r; + + nn_assert(nn->num_irqs > 0, "num_irqs is zero"); + nn_assert(nn->num_r_vecs > 0, "num_r_vecs is zero"); + + /* Assumes nn->num_tx_rings == nn->num_rx_rings */ + if (nn->num_tx_rings > nn->num_r_vecs) { + nn_warn(nn, "More rings (%d) than vectors (%d).\n", + nn->num_tx_rings, nn->num_r_vecs); + nn->num_tx_rings = nn->num_r_vecs; + nn->num_rx_rings = nn->num_r_vecs; + } + + nn->lsc_handler = nfp_net_irq_lsc; + nn->exn_handler = nfp_net_irq_exn; + + for (i = NFP_NET_NON_Q_VECTORS, r = 0; i < nn->num_irqs; i++, r++) { + r_vec = &nn->r_vecs[r]; + r_vec->nfp_net = nn; + r_vec->idx = r; + r_vec->handler = nfp_net_irq_rxtx; + r_vec->irq_idx = i; + clear_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags); + + cpumask_set_cpu(r, &r_vec->affinity_mask); + + r_vec->tx_ring = &nn->tx_rings[r]; + nn->tx_rings[r].idx = r; + nn->tx_rings[r].r_vec = r_vec; + nfp_net_tx_ring_init(r_vec->tx_ring); + + r_vec->rx_ring = &nn->rx_rings[r]; + nn->rx_rings[r].idx = r; + nn->rx_rings[r].r_vec = r_vec; + nfp_net_rx_ring_init(r_vec->rx_ring); + } +} + +/** + * nfp_net_irqs_request() - Request the common interrupts + * @netdev: netdev structure + * + * Interrupts for LSC and EXN (ring vectors are requested elsewhere) + */ +static int nfp_net_irqs_request(struct net_device *netdev) +{ + struct msix_entry *lsc_entry, *exn_entry; + struct nfp_net *nn = netdev_priv(netdev); + int err; + + nn_assert(nn->num_irqs > 0, "num_irqs is zero"); + + lsc_entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX]; + + snprintf(nn->lsc_name, sizeof(nn->lsc_name), "%s-lsc", netdev->name); + err = request_irq(lsc_entry->vector, + nn->lsc_handler, 0, nn->lsc_name, netdev); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + lsc_entry->vector, err); + return err; + } + nn_writeb(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); + + exn_entry = &nn->irq_entries[NFP_NET_IRQ_EXN_IDX]; + + snprintf(nn->exn_name, sizeof(nn->exn_name), "%s-exn", netdev->name); + err = request_irq(exn_entry->vector, + nn->exn_handler, 0, nn->exn_name, netdev); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + exn_entry->vector, err); + goto err_exn; + } + nn_writeb(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + + return 0; + +err_exn: + free_irq(lsc_entry->vector, netdev); + nn_writeb(nn, NFP_NET_CFG_LSC, 0xff); + return err; +} + +/** + * nfp_net_irqs_free() - Free the requested common interrupts + * @netdev: netdev structure + * + * This frees the general interrupt (not the ring interrupts). It + * undoes what @nfp_net_irqs_request set-up. + */ +static void nfp_net_irqs_free(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + nn_assert(nn->num_irqs > 0, "num_irqs is 0"); + + synchronize_irq(nn->irq_entries[NFP_NET_IRQ_EXN_IDX].vector); + free_irq(nn->irq_entries[NFP_NET_IRQ_EXN_IDX].vector, netdev); + nn_writeb(nn, NFP_NET_CFG_EXN, 0xff); + + synchronize_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); + free_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector, netdev); + nn_writeb(nn, NFP_NET_CFG_LSC, 0xff); +} + +/* Transmit + * + * One queue controller peripheral queue is used for transmit. The + * driver en-queues packets for transmit by advancing the write + * pointer. The device indicates that packets have transmitted by + * advancing the read pointer. The driver maintains a local copy of + * the read and write pointer in @struct nfp_net_tx_ring. The driver + * keeps @wr_p in sync with the queue controller write pointer and can + * determine how many packets have been transmitted by comparing its + * copy of the read pointer @rd_p with the read pointer maintained by + * the queue controller peripheral. + */ + +/** + * nfp_net_tx_full() - Check if the TX ring is full + * @tx_ring: TX ring to check + * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) + * + * This function checks, based on the *host copy* of read/write + * pointer if a given TX ring is full. The real TX queue may have + * some newly made available slots. + * + * Return: True if the ring is full. + */ +static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) +{ + return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); +} + +/* Wrappers for deciding when to stop and restart TX queues */ +static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) +{ + return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); +} + +static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) +{ + return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); +} + +/** + * nfp_net_tx_ring_stop() - stop tx ring + * @nd_q: netdev queue + * @tx_ring: driver tx queue structure + * + * Safely stop TX ring. Remember that while we are running .start_xmit() + * someone else may be cleaning the TX ring completions so we need to be + * extra careful here. + */ +static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, + struct nfp_net_tx_ring *tx_ring) +{ + netif_tx_stop_queue(nd_q); + + /* We can race with the TX completion out of NAPI so recheck */ + smp_mb(); + if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) + netif_tx_start_queue(nd_q); +} + +/** + * nfp_net_tx_tso() - Set up Tx descriptor for LSO + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to HW TX descriptor + * @skb: Pointer to SKB + * + * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. + * Return error on packet header greater than maximum supported LSO header size. + */ +static int nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + u32 hdrlen; + + if (!skb_is_gso(skb)) + return 0; + + if (!skb->encapsulation) + hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); + else + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; + txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); + + txd->l4_offset = hdrlen; + txd->lso = cpu_to_le16(skb_shinfo(skb)->gso_size); + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_lso++; + u64_stats_update_end(&r_vec->tx_sync); + + return 0; +} + +/** + * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to TX descriptor + * @skb: Pointer to SKB + * + * This function sets the TX checksum flags in the TX descriptor based + * on the configuration and the protocol of the packet to be transmitted. + */ +static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + struct ipv6hdr *ipv6h; + struct iphdr *iph; + u8 l4_hdr; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) + return; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return; + + txd->flags |= PCIE_DESC_TX_CSUM; + + iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); + ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); + + if (iph->version == 4) { + txd->flags |= PCIE_DESC_TX_IP4_CSUM; + l4_hdr = iph->protocol; + } else if (ipv6h->version == 6) { + l4_hdr = ipv6h->nexthdr; + } else { + nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", + iph->version); + return; + } + + switch (l4_hdr) { + case IPPROTO_TCP: + txd->flags |= PCIE_DESC_TX_TCP_CSUM; + break; + case IPPROTO_UDP: + txd->flags |= PCIE_DESC_TX_UDP_CSUM; + break; + default: + nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", + l4_hdr); + return; + } + + if (skb->encapsulation) { + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + nn_warn_ratelimit(nn, "invalid proto for encap=%x!\n", + vlan_get_protocol(skb)); + return; + } + + switch (l4_hdr) { + case IPPROTO_GRE: + txd->flags |= PCIE_DESC_TX_ENCAP_NVGRE; + break; + case IPPROTO_UDP: + txd->flags |= PCIE_DESC_TX_ENCAP_VXLAN; + break; + default: + nn_warn_ratelimit(nn, "invalid encap l4 proto=%x!\n", + l4_hdr); + return; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; + u64_stats_update_end(&r_vec->tx_sync); + return; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->hw_csum_tx += txbuf->pkt_cnt; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx() - Main transmit entry point + * @skb: SKB to transmit + * @netdev: netdev structure + * + * Return: NETDEV_TX_OK on success. + */ +static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + const struct skb_frag_struct *frag; + struct nfp_net_r_vector *r_vec; + struct nfp_net_tx_desc *txd, txdg; + struct nfp_net_tx_buf *txbuf; + struct nfp_net_tx_ring *tx_ring; + struct netdev_queue *nd_q; + dma_addr_t dma_addr; + unsigned int fsize; + int nr_frags; + int wr_idx; + u16 qidx; + int err, f; + + qidx = skb_get_queue_mapping(skb); + tx_ring = &nn->tx_rings[qidx]; + r_vec = tx_ring->r_vec; + nd_q = netdev_get_tx_queue(nn->netdev, qidx); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + nr_frags = skb_shinfo(skb)->nr_frags; + + if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { + nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", + qidx, tx_ring->wr_p, tx_ring->rd_p); + netif_tx_stop_queue(nd_q); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_busy++; + u64_stats_update_end(&r_vec->tx_sync); + return NETDEV_TX_BUSY; + } + + /* Start with the head skbuf */ + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), + DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_free; + + wr_idx = tx_ring->wr_p % tx_ring->cnt; + + /* Stash the soft descriptor of the head then initialize it */ + txbuf = &tx_ring->txbufs[wr_idx]; + txbuf->skb = skb; + txbuf->dma_addr = dma_addr; + txbuf->fidx = -1; + txbuf->pkt_cnt = 1; + txbuf->real_len = skb->len; + + /* Build TX descriptor */ + txd = &tx_ring->txds[wr_idx]; + txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; + txd->dma_len = cpu_to_le16(skb_headlen(skb)); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->data_len = cpu_to_le16(skb->len); + + txd->lso = 0; + txd->l4_offset = 0; + err = nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); + if (err) + goto err_unmap_head; + + txd->flags = 0; + nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); + + if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { + txd->flags |= PCIE_DESC_TX_VLAN; + txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + } + + /* Gather DMA */ + if (nr_frags > 0) { + /* all descs must match except for in addr, length and eop */ + txdg = *txd; + + for (f = 0; f < nr_frags; f++) { + frag = &skb_shinfo(skb)->frags[f]; + fsize = skb_frag_size(frag); + + dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, + fsize, DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_unmap_frags; + + wr_idx = (wr_idx + 1) % tx_ring->cnt; + tx_ring->txbufs[wr_idx].skb = skb; + tx_ring->txbufs[wr_idx].dma_addr = dma_addr; + tx_ring->txbufs[wr_idx].fidx = f; + + txd = &tx_ring->txds[wr_idx]; + *txd = txdg; + txd->dma_len = cpu_to_le16(fsize); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->offset_eop = + (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_gather++; + u64_stats_update_end(&r_vec->tx_sync); + } + + netdev_tx_sent_queue(nd_q, txbuf->real_len); + + tx_ring->wr_p += nr_frags + 1; + if (nfp_net_tx_ring_should_stop(tx_ring)) + nfp_net_tx_ring_stop(nd_q, tx_ring); + + tx_ring->wr_ptr_add += nr_frags + 1; + if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { + /* force memory write before we let HW know */ + wmb(); + nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); + tx_ring->wr_ptr_add = 0; + } + + skb_tx_timestamp(skb); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + return NETDEV_TX_OK; + +err_unmap_frags: + --f; + while (f >= 0) { + frag = &skb_shinfo(skb)->frags[f]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[wr_idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; + wr_idx = wr_idx - 1; + if (wr_idx < 0) + wr_idx += tx_ring->cnt; + } +err_unmap_head: + dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; +err_free: + nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_errors++; + u64_stats_update_end(&r_vec->tx_sync); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +/** + * nfp_net_tx_complete() - Handled completed TX packets + * @tx_ring: TX ring structure + * + * Return: Number of completed TX descriptors + */ +static int nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + u32 done_pkts = 0, done_bytes = 0; + int todo, completed = 0; + struct sk_buff *skb; + int nr_frags; + u32 qcp_rd_p; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + /* Work out how many descriptors have been transmitted */ + qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + + if (qcp_rd_p == tx_ring->qcp_rd_p) + return 0; + + if (qcp_rd_p > tx_ring->qcp_rd_p) + todo = qcp_rd_p - tx_ring->qcp_rd_p; + else + todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; + + while (todo > completed) { + idx = tx_ring->rd_p % tx_ring->cnt; + tx_ring->rd_p++; + completed++; + + skb = tx_ring->txbufs[idx].skb; + if (!skb) + continue; + + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + + done_pkts += tx_ring->txbufs[idx].pkt_cnt; + done_bytes += tx_ring->txbufs[idx].real_len; + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + tx_ring->qcp_rd_p = qcp_rd_p; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_bytes += done_bytes; + r_vec->tx_pkts += done_pkts; + u64_stats_update_end(&r_vec->tx_sync); + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); + if (nfp_net_tx_ring_should_wake(tx_ring)) { + /* Make sure TX thread will see updated tx_ring->rd_p */ + smp_mb(); + + if (unlikely(netif_tx_queue_stopped(nd_q))) + netif_tx_wake_queue(nd_q); + } + + return completed; +} + +/** + * nfp_net_tx_flush() - Free any untransmitted buffers currently on the TX ring + * @tx_ring: TX ring structure + * + * Assumes that the device is stopped + */ +static void nfp_net_tx_flush(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + struct sk_buff *skb; + int nr_frags; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + while (tx_ring->rd_p != tx_ring->wr_p) { + idx = tx_ring->rd_p % tx_ring->cnt; + + skb = tx_ring->txbufs[idx].skb; + if (skb) { + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), + DMA_TO_DEVICE); + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), + DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + memset(&tx_ring->txds[idx], 0, sizeof(tx_ring->txds[idx])); + + tx_ring->qcp_rd_p++; + tx_ring->rd_p++; + } + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_reset_queue(nd_q); +} + +static void nfp_net_tx_timeout(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < nn->num_tx_rings; i++) { + if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) + continue; + nn_warn(nn, "TX timeout on ring: %d\n", i); + } + nn_warn(nn, "TX watchdog timeout\n"); +} + +/* Receive processing + */ + +/** + * nfp_net_rx_space() - return the number of free slots on the RX ring + * @rx_ring: RX ring structure + * + * Make sure we leave at least one slot free. + * + * Return: True if there is space on the RX ring + */ +static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring) +{ + return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p); +} + +/** + * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors + * @flags: RX descriptor flags field in CPU byte order + */ +static int nfp_net_rx_csum_has_errors(u16 flags) +{ + u16 csum_all_checked, csum_all_ok; + + csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; + csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; + + return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); +} + +/** + * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags + * @nn: NFP Net device + * @r_vec: per-ring structure + * @rxd: Pointer to RX descriptor + * @skb: Pointer to SKB + */ +static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_rx_desc *rxd, struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + if (!(nn->netdev->features & NETIF_F_RXCSUM)) + return; + + if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_error++; + u64_stats_update_end(&r_vec->rx_sync); + return; + } + + /* Assume that the firmware will never report inner CSUM_OK unless outer + * L4 headers were successfully parsed. FW will always report zero UDP + * checksum as CSUM_OK. + */ + if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } + + if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_inner_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } +} + +/** + * nfp_net_set_hash() - Set SKB hash data + * @skb: SKB to set the hash data on + * @rxd: RX descriptor + * + * The RSS hash and hash-type are pre-pended to the packet data. + * Extract and decode it and set the skb fields. + */ +static void nfp_net_set_hash(struct sk_buff *skb, struct nfp_net_rx_desc *rxd) +{ + struct nfp_net_rx_hash *rx_hash; + + if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) { + skb_set_hash(skb, 0, PKT_HASH_TYPE_NONE); + return; + } + + rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); + + switch (be32_to_cpu(rx_hash->hash_type)) { + case NFP_NET_RSS_IPV4: + case NFP_NET_RSS_IPV6: + case NFP_NET_RSS_IPV6_EX: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3); + break; + default: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4); + } +} + +/** + * nfp_net_rx() - receive up to @budget packets on @rx_ring + * @rx_ring: RX ring to receive from + * @budget: NAPI budget + * + * Note, this function is separated out from the napi poll function to + * more cleanly separate packet receive code from other bookkeeping + * functions performed in the napi poll function. + * + * There are differences between the NFP-3200 firmware and the + * NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue + * to indicate that new packets have arrived. The NFP-6000 does not + * have this queue and uses the DD bit in the RX descriptor. This + * method cannot be used on the NFP-3200 as it causes a race + * condition: The RX ring write pointer on the NFP-3200 is updated + * after packets (and descriptors) have been DMAed. If the DD bit is + * used and subsequently the read pointer is updated this may lead to + * the RX queue to underflow (if the firmware has not yet update the + * write pointer). Therefore we use slightly ugly conditional code + * below to handle the differences. We may, in the future update the + * NFP-3200 firmware to behave the same as the firmware on the + * NFP-6000. + * + * Return: Number of packets received. + */ +static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + unsigned int data_len, meta_len; + int avail = 0, pkts_polled = 0; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + u32 qcp_wr_p; + int idx; + + if (nn->is_nfp3200) { + /* Work out how many packets arrived */ + qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + idx = rx_ring->rd_p % rx_ring->cnt; + + if (qcp_wr_p == idx) + /* No new packets */ + return 0; + + if (qcp_wr_p > idx) + avail = qcp_wr_p - idx; + else + avail = qcp_wr_p + rx_ring->cnt - idx; + } else { + avail = budget + 1; + } + + while (avail > 0 && pkts_polled < budget) { + idx = rx_ring->rd_p % rx_ring->cnt; + + skb = rx_ring->rxbufs[idx].skb; + if (!skb) { + nn_err(nn, "No SKB with RX descriptor %d:%u\n", + rx_ring->idx, idx); + break; + } + + rxd = &rx_ring->rxds[idx]; + if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) { + if (nn->is_nfp3200) + nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n", + rx_ring->idx, idx, + rxd->vals[0], rxd->vals[1]); + break; + } + /* Memory barrier to ensure that we won't do other reads + * before the DD bit. + */ + dma_rmb(); + + nn_assert(le16_to_cpu(rxd->rxd.data_len) <= nn->fl_bufsz, + "RX data larger than freelist buffer (%u > %u) on %d:%u rxd[0]=%#x rxd[1]=%#x\n", + le16_to_cpu(rxd->rxd.data_len), nn->fl_bufsz, + rx_ring->idx, idx, rxd->vals[0], rxd->vals[1]); + + dma_unmap_single(&nn->pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + + meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; + data_len = le16_to_cpu(rxd->rxd.data_len); + + if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) { + /* The packet data starts after the metadata */ + skb_reserve(skb, meta_len); + } else { + /* The packet data starts at a fixed offset */ + skb_reserve(skb, nn->rx_offset); + } + + /* Adjust the SKB for the dynamic meta data pre-pended */ + skb_put(skb, data_len - meta_len); + + nfp_net_set_hash(skb, rxd); + + /* Pad small frames to minimum */ + if (skb_put_padto(skb, 60)) + break; + + /* Stats update */ + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_pkts++; + r_vec->rx_bytes += skb->len; + u64_stats_update_end(&r_vec->rx_sync); + + skb_record_rx_queue(skb, rx_ring->idx); + skb->protocol = eth_type_trans(skb, nn->netdev); + + nfp_net_rx_csum(nn, r_vec, rxd, skb); + + if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + le16_to_cpu(rxd->rxd.vlan)); + + napi_gro_receive(&rx_ring->r_vec->napi, skb); + + /* Clear internal state to be on the safe side */ + rx_ring->rxbufs[idx].skb = NULL; + rx_ring->rxbufs[idx].dma_addr = 0; + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + pkts_polled++; + avail--; + } + + if (nn->is_nfp3200) + nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled); + + return pkts_polled; +} + +/** + * nfp_net_rx_freelist_alloc_one() - Allocate, map and write descriptors + * @rx_ring: RX add the buffer to + * + * This function will allcate a new skb, map it for DMA and write HW and SW + * descriptors. It will, however, *not* give the buffer to HW. + */ +static int nfp_net_rx_freelist_alloc_one(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + dma_addr_t dma_addr; + int wr_idx; + + skb = netdev_alloc_skb(nn->netdev, nn->fl_bufsz); + if (!skb) { + nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); + return -ENOMEM; + } + + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, + nn->fl_bufsz, DMA_FROM_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) { + dev_kfree_skb_any(skb); + nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); + return -ENOMEM; + } + + wr_idx = rx_ring->wr_p % rx_ring->cnt; + + /* Stash SKB and DMA address away */ + rx_ring->rxbufs[wr_idx].skb = skb; + rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; + + /* Fill freelist descriptor */ + rxd = &rx_ring->rxds[wr_idx]; + rxd->fld.meta_len_dd = 0; + nfp_desc_set_dma_addr(&rxd->fld, dma_addr); + rx_ring->wr_p++; + + return 0; +} + +/** + * nfp_net_rx_fill_freelist() - Attempt filling freelist with RX buffers + * @rx_ring: RX ring to fill + * + * Try to fill as many buffers as possible into freelist. Return + * number of buffers added. + * + * Return: Number of freelist buffers added. + */ +static int nfp_net_rx_fill_freelist(struct nfp_net_rx_ring *rx_ring) +{ + int added = 0; + int i; + + while (nfp_net_rx_space(rx_ring) >= NFP_NET_FL_BATCH) { + for (i = 0; i < NFP_NET_FL_BATCH; i++) { + if (nfp_net_rx_freelist_alloc_one(rx_ring)) + break; + } + + /* Update write pointer of the freelist queue. Make + * sure all writes are flushed before telling the hardware. + */ + wmb(); + nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, i); + added += i; + + /* stop on error */ + if (i < NFP_NET_FL_BATCH) + break; + } + + return added; +} + +/** + * nfp_net_rx_flush() - Free any buffers currently on the RX ring + * @rx_ring: RX ring to remove buffers from + * + * Assumes that the device is stopped + */ +static void nfp_net_rx_flush(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int idx; + + while (rx_ring->rd_p != rx_ring->wr_p) { + idx = rx_ring->rd_p % rx_ring->cnt; + + if (rx_ring->rxbufs[idx].skb) { + dma_unmap_single(&pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_ring->rxbufs[idx].skb); + rx_ring->rxbufs[idx].dma_addr = 0; + rx_ring->rxbufs[idx].skb = NULL; + } + + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + } +} + +/** + * nfp_net_poll() - napi poll function + * @napi: NAPI structure + * @budget: NAPI budget + * + * Return: 0 if done with polling. + */ +static int nfp_net_poll(struct napi_struct *napi, int budget) +{ + struct nfp_net_r_vector *r_vec = + container_of(napi, struct nfp_net_r_vector, napi); + struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; + struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring; + struct nfp_net *nn = r_vec->nfp_net; + struct netdev_queue *txq; + bool complete = true; + int pkts_completed; + int pkts_polled; + + /* Handle completed TX. If the TX queue was stopped, re-enable it */ + tx_ring = &nn->tx_rings[rx_ring->idx]; + txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + + pkts_completed = nfp_net_tx_complete(tx_ring); + if (pkts_completed) + complete = false; + + /* Receive any packets */ + pkts_polled = nfp_net_rx(rx_ring, budget); + if (pkts_polled) + complete = false; + + /* refill freelist */ + nfp_net_rx_fill_freelist(rx_ring); + + if (!complete) + return budget; + + /* If there are no more packets to receive and no more TX + * descriptors to be cleaned, unmask the MSI-X vector and + * switch NAPI back into interrupt mode. + */ + napi_complete_done(napi, pkts_polled); + + nfp_net_irq_unmask(nn, r_vec->irq_idx); + + return pkts_polled; +} + +/* Setup and Configuration + */ + +/** + * nfp_net_tx_ring_free() - Free resources allocated to a TX ring + * @tx_ring: TX ring to free + */ +static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), 0); + + kfree(tx_ring->txbufs); + + if (tx_ring->txds) + dma_free_coherent(&pdev->dev, tx_ring->size, + tx_ring->txds, tx_ring->dma); + + tx_ring->cnt = 0; + tx_ring->wr_p = 0; + tx_ring->rd_p = 0; + tx_ring->qcp_rd_p = 0; + + tx_ring->txbufs = NULL; + tx_ring->txds = NULL; + tx_ring->dma = 0; + tx_ring->size = 0; +} + +/** + * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring + * @tx_ring: TX Ring structure to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int err, sz; + + tx_ring->cnt = nn->txd_cnt; + + tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; + tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->txds) { + err = -ENOMEM; + goto err_alloc; + } + + sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; + tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); + if (!tx_ring->txbufs) { + err = -ENOMEM; + goto err_alloc; + } + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), tx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), ilog2(tx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), r_vec->irq_idx); + + netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); + + nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", + tx_ring->idx, tx_ring->qcidx, + tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); + + return 0; + +err_alloc: + nfp_net_tx_ring_free(tx_ring); + return err; +} + +/** + * nfp_net_rx_ring_free() - Free resources allocated to a RX ring + * @rx_ring: RX ring to free + */ +static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), 0); + + kfree(rx_ring->rxbufs); + + if (rx_ring->rxds) + dma_free_coherent(&pdev->dev, rx_ring->size, + rx_ring->rxds, rx_ring->dma); + + rx_ring->cnt = 0; + rx_ring->wr_p = 0; + rx_ring->rd_p = 0; + + rx_ring->rxbufs = NULL; + rx_ring->rxds = NULL; + rx_ring->dma = 0; + rx_ring->size = 0; +} + +/** + * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring + * @rx_ring: RX ring to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int err, sz; + + rx_ring->cnt = nn->rxd_cnt; + + rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; + rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->rxds) { + err = -ENOMEM; + goto err_alloc; + } + + sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; + rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); + if (!rx_ring->rxbufs) { + err = -ENOMEM; + goto err_alloc; + } + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), rx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), ilog2(rx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), r_vec->irq_idx); + + nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", + rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, + rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); + + return 0; + +err_alloc: + nfp_net_rx_ring_free(rx_ring); + return err; +} + +/** + * nfp_net_alloc_resources() - Allocate resources for RX and TX rings + * @nn: NFP Net device to reconfigure + * + * Return: 0 on success or negative errno on error. + */ +static int nfp_net_alloc_resources(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + int err; + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + + clear_bit(NFP_NET_RVEC_NAPI_STARTED, &r_vec->flags); + + /* Setup NAPI */ + netif_napi_add(nn->netdev, &r_vec->napi, + nfp_net_poll, NFP_NET_NAPI_WEIGHT); + + entry = &nn->irq_entries[r_vec->irq_idx]; + + snprintf(r_vec->name, sizeof(r_vec->name), + "%s-rxtx-%d", nn->netdev->name, r); + err = request_irq(entry->vector, r_vec->handler, 0, + r_vec->name, r_vec); + if (err) { + nn_dbg(nn, "Error requesting IRQ %d\n", entry->vector); + goto err_alloc; + } + + set_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags); + + irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); + + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", + r, entry->vector, entry->entry); + + /* Allocate TX ring resources */ + if (r_vec->tx_ring) { + err = nfp_net_tx_ring_alloc(r_vec->tx_ring); + if (err) + goto err_alloc; + } + + /* Allocate RX ring resources */ + if (r_vec->rx_ring) { + err = nfp_net_rx_ring_alloc(r_vec->rx_ring); + if (err) + goto err_alloc; + } + } + + return 0; + +err_alloc: + while (r--) { + r_vec = &nn->r_vecs[r]; + + if (r_vec->rx_ring) + nfp_net_rx_ring_free(r_vec->rx_ring); + if (r_vec->tx_ring) + nfp_net_tx_ring_free(r_vec->tx_ring); + + if (test_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags)) { + entry = &nn->irq_entries[r_vec->irq_idx]; + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); + clear_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags); + } + netif_napi_del(&r_vec->napi); + } + return err; +} + +/** + * nfp_net_free_resources() - Free all resources + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_free_resources(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + int i; + + for (i = 0; i < nn->num_r_vecs; i++) { + r_vec = &nn->r_vecs[i]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + if (r_vec->rx_ring) + nfp_net_rx_ring_free(r_vec->rx_ring); + if (r_vec->tx_ring) + nfp_net_tx_ring_free(r_vec->tx_ring); + + if (test_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags)) { + irq_set_affinity_hint(entry->vector, NULL); + synchronize_irq(entry->vector); + free_irq(entry->vector, r_vec); + clear_bit(NFP_NET_RVEC_IRQ_REQUESTED, &r_vec->flags); + } + + netif_napi_del(&r_vec->napi); + } +} + +/** + * nfp_net_rss_write_itbl() - Write RSS indirection table to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_itbl(struct nfp_net *nn) +{ + u32 val; + int i, j; + + for (i = 0, j = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) { + val = nn->rss_itbl[j++]; + val |= nn->rss_itbl[j++] << 8; + val |= nn->rss_itbl[j++] << 16; + val |= nn->rss_itbl[j++] << 24; + + nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, val); + } +} + +/** + * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW + * @nn: NFP Net device to reconfigure + */ +void nfp_net_coalesce_write_cfg(struct nfp_net *nn) +{ + u8 i; + u32 factor; + u32 value; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* copy RX interrupt coalesce parameters */ + value = (nn->rx_coalesce_max_frames << 16) | + (factor * nn->rx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); + + /* copy TX interrupt coalesce parameters */ + value = (nn->tx_coalesce_max_frames << 16) | + (factor * nn->tx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); +} + +/** + * nfp_net_write_mac_addr() - Write mac address to device registers + * @nn: NFP Net device to reconfigure + * @mac: Six-byte MAC address to be written + * + * We do a bit of byte swapping dance because firmware is LE. + */ +static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) +{ + nn_writel(nn, NFP_NET_CFG_MACADDR + 0, + get_unaligned_be32(nn->netdev->dev_addr)); + /* We can't do writew for NFP-3200 compatibility */ + nn_writel(nn, NFP_NET_CFG_MACADDR + 4, + get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); +} + +static int nfp_net_netdev_open(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err, n, i, r; + u32 update = 0; + u32 new_ctrl; + u32 rss_cfg; + u32 sts; + + if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { + nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); + return -EBUSY; + } + + netif_carrier_off(netdev); + + new_ctrl = nn->ctrl; + + /* Step 1: Allocate resources for rings and the like + * - Request interrupts + * - Allocate RX and TX ring resources + * - Setup initial RSS table + */ + err = nfp_net_irqs_request(netdev); + if (err) + return err; + + err = nfp_net_alloc_resources(nn); + if (err) + goto err_alloc_rings; + + err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); + if (err) + goto err_set_queues; + + err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); + if (err) + goto err_set_queues; + + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + for (i = 0; i < sizeof(nn->rss_itbl); i++) + nn->rss_itbl[i] = + ethtool_rxfh_indir_default(i, nn->num_rx_rings); + nfp_net_rss_write_itbl(nn); + + new_ctrl |= NFP_NET_CFG_CTRL_RSS; + + /* Enable IPv4/IPv6 TCP by default */ + rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | + NFP_NET_CFG_RSS_IPV6_TCP | + NFP_NET_CFG_RSS_TOEPLITZ | + NFP_NET_CFG_RSS_MASK; + writel(rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); + update |= NFP_NET_CFG_UPDATE_RSS; + } + + if (nn->pdev->msix_enabled && (nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) { + /* defaults correspond to no IRQ moderation */ + nn->rx_coalesce_usecs = 0; + nn->rx_coalesce_max_frames = 1; + nn->tx_coalesce_usecs = 0; + nn->tx_coalesce_max_frames = 1; + + /* write configuration to device */ + nfp_net_coalesce_write_cfg(nn); + + new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + update |= NFP_NET_CFG_UPDATE_IRQMOD; + } + + /* Step 2: Configure the NFP + * - Enable rings from 0 to tx_rings/rx_rings - 1. + * - Write MAC address (in case it changed) + * - Set the MTU + * - Set the Freelist buffer size + * - Enable the FW + */ + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); + + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); + + nfp_net_write_mac_addr(nn, netdev->dev_addr); + + nn_writel(nn, NFP_NET_CFG_MTU, netdev->mtu); + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); + + /* Enable device */ + new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; + update |= NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; + + if (nn->pdev->msix_enabled) + update |= NFP_NET_CFG_UPDATE_MSIX; + + if (nn->rss_cfg) + update |= NFP_NET_CFG_UPDATE_RSS; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + goto err_reconfig; + + nn->ctrl = new_ctrl; + + /* Step 3: Enable for kernel + * - put some freelist descriptors on each RX ring + * - enable NAPI on each ring + * - enable all TX queues + * - set link state + */ + for (r = 0; r < nn->num_r_vecs; r++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; + + /* Because we don't have any "RX enable bit" as soon as we give + * FW buffers it can start consuming them. Add to that the IRQ + * automasking feature and we can deadlock the RX - FW may + * consume all the buffers before we can take interrupts. + * + * As a workaround we set 32 buffers aside - we put them on the + * ring just don't increment the ring count for FW. We can then + * give them to FW once IRQs are fully ready without risking any + * races with IRQ/napi handlers. + * We need at least 32 buffers because thats the batch size + * in which FW consumes them. + */ + for (i = 0; i < NFP_NET_FL_KICK_BATCH; i++) + if (nfp_net_rx_freelist_alloc_one(r_vec->rx_ring)) + goto err_reconfig; + + n = nfp_net_rx_fill_freelist(r_vec->rx_ring); + nn_dbg(nn, "RV%02d RxQ%02d: Added %d freelist buffers\n", + r, r_vec->rx_ring->idx, n + NFP_NET_FL_KICK_BATCH); + + napi_enable(&r_vec->napi); + set_bit(NFP_NET_RVEC_NAPI_STARTED, &r_vec->flags); + } + + netif_tx_wake_all_queues(netdev); + + /* Now we are fully set up - unmask IRQs and release extra buffers */ + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_irq_unmask(nn, nn->r_vecs[r].irq_idx); + msleep(1); + for (r = 0; r < nn->num_r_vecs; r++) + nfp_qcp_wr_ptr_add(nn->r_vecs[r].rx_ring->qcp_fl, + NFP_NET_FL_KICK_BATCH); + + sts = nn_readl(nn, NFP_NET_CFG_STS); + nn->link_up = !!(sts & NFP_NET_CFG_STS_LINK); + nfp_net_print_link(nn, nn->link_up); + if (nn->link_up) + netif_carrier_on(netdev); + + return 0; + +err_reconfig: + /* Could clean up some of the cfg BAR settings here */ +err_set_queues: + nfp_net_free_resources(nn); +err_alloc_rings: + nfp_net_irqs_free(netdev); + return err; +} + +/** + * nfp_net_netdev_close() - Called when the device is downed + * @netdev: netdev structure + */ +static int nfp_net_netdev_close(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int new_ctrl, update; + int err, r, i; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { + nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); + return 0; + } + + /* Step 1: Disable RX and TX rings from the Linux kernel perspective + */ + netif_carrier_off(netdev); + + for (r = 0; r < nn->num_r_vecs; r++) { + clear_bit(NFP_NET_RVEC_NAPI_STARTED, &nn->r_vecs[r].flags); + napi_disable(&nn->r_vecs[r].napi); + } + + netif_tx_disable(netdev); + + /* Step 2: Tell NFP + */ + new_ctrl = nn->ctrl; + new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; + update = NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->pdev->msix_enabled) + update |= NFP_NET_CFG_UPDATE_MSIX; + + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + + /* Step 3: Notify NFP + */ + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + return err; + + nn->ctrl = new_ctrl; + + /* Step 4: Free resources + */ + for (i = 0; i < nn->num_r_vecs; i++) { + nfp_net_rx_flush(nn->r_vecs[i].rx_ring); + nfp_net_tx_flush(nn->r_vecs[i].tx_ring); + } + + nfp_net_free_resources(nn); + nfp_net_irqs_free(netdev); + + nn_dbg(nn, "%s down", netdev->name); + return 0; +} + +static void nfp_net_set_rx_mode(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl, update; + + if (netdev->flags & IFF_PROMISC && + !(nn->cap & NFP_NET_CFG_CTRL_PROMISC)) { + nn_warn(nn, "FW does not support promiscuous mode"); + return; + } + + new_ctrl = nn->ctrl; + + if (netdev->flags & IFF_PROMISC) { + if (!(nn->cap & NFP_NET_CFG_CTRL_PROMISC)) { + nn_warn(nn, "FW does not support promiscuous mode"); + return; + } + new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; + } + + if (netdev->flags & IFF_ALLMULTI) { + if (!(nn->cap & NFP_NET_CFG_CTRL_L2MC)) + nn_warn(nn, "FW does not support ALLMULTI"); + else + new_ctrl |= NFP_NET_CFG_CTRL_L2MC; + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC; + } + + if (new_ctrl != nn->ctrl) { + update = NFP_NET_CFG_UPDATE_GEN; + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + nfp_net_reconfig(nn, update); + nn->ctrl = new_ctrl; + } +} + +static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 tmp; + + nn_dbg(nn, "New MTU = %d", new_mtu); + + if (new_mtu < 68 || new_mtu > nn->max_mtu) { + nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); + return -EINVAL; + } + + netdev->mtu = new_mtu; + + /* Freelist buffer size rounded up to the nearest 1K */ + tmp = new_mtu + ETH_HLEN + VLAN_HLEN + NFP_NET_MAX_PREPEND; + nn->fl_bufsz = roundup(tmp, 1024); + + /* restart if running */ + if (netif_running(netdev)) { + nfp_net_netdev_close(netdev); + nfp_net_netdev_open(netdev); + } + + return 0; +} + +static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < nn->num_r_vecs; i++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[i]; + u64 data[3]; + unsigned int start; + + do { + start = u64_stats_fetch_begin(&r_vec->rx_sync); + data[0] = r_vec->rx_pkts; + data[1] = r_vec->rx_bytes; + } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); + stats->rx_packets += data[0]; + stats->rx_bytes += data[1]; + + do { + start = u64_stats_fetch_begin(&r_vec->tx_sync); + data[0] = r_vec->tx_pkts; + data[1] = r_vec->tx_bytes; + data[2] = r_vec->tx_errors; + } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); + stats->tx_packets += data[0]; + stats->tx_bytes += data[1]; + stats->tx_errors += data[2]; + } + + return stats; +} + +static int nfp_net_set_features(struct net_device *netdev, + netdev_features_t features) +{ + netdev_features_t changed = netdev->features ^ features; + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl, update; + int err; + + /* Assume this is not called with features we have not advertised */ + + new_ctrl = nn->ctrl; + + if (changed & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; + } + + if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { + if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) + new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; + } + + if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { + if (features & (NETIF_F_TSO | NETIF_F_TSO6)) + new_ctrl |= NFP_NET_CFG_CTRL_LSO; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; + } + + if (changed & (NETIF_F_RXHASH | NETIF_F_NTUPLE)) { + if (features & (NETIF_F_RXHASH | NETIF_F_NTUPLE)) + new_ctrl |= NFP_NET_CFG_CTRL_RSS; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RSS; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_TX) { + if (features & NETIF_F_HW_VLAN_CTAG_TX) + new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; + } + + if (changed & NETIF_F_SG) { + if (features & NETIF_F_SG) + new_ctrl |= NFP_NET_CFG_CTRL_GATHER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; + } + + nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", + (long long)netdev->features, (long long)features, + (long long)changed); + + if (new_ctrl != nn->ctrl) { + nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x", nn->ctrl, new_ctrl); + update = NFP_NET_CFG_UPDATE_GEN; + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + return err; + nn->ctrl = new_ctrl; + } + + netdev->features = features; + + return 0; +} + +static netdev_features_t +nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + u8 l4_hdr; + + /* We can't do TSO over double tagged packets (802.1AD) */ + features &= vlan_features_check(skb, features); + + if (!skb->encapsulation) + return features; + + /* Ensure that inner L4 header offset fits into TX descriptor field */ + if (skb_is_gso(skb)) { + u32 hdrlen; + + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) + features &= ~NETIF_F_GSO_MASK; + } + + /* VXLAN/GRE check */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + } + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || + (l4_hdr == IPPROTO_UDP && + (skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + + return features; +} + +/** + * nfp_net_set_vxlan_port() - set vxlan port in SW and HW + * @nn: NFP Net device to reconfigure + * @idx: Index into the port table where new port should be written + * @port: UDP port to configure (pass zero to remove VXLAN port) + */ +static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) +{ + int i; + + BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); + + nn->vxlan_ports[idx] = port; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) + nn_writel(nn, NFP_NET_CFG_VXLAN_PORT, + be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | + be16_to_cpu(nn->vxlan_ports[i])); + + nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); +} + +static void nfp_net_add_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i, free_idx = -1; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { + if (nn->vxlan_ports[i] == port) + return; + if (!nn->vxlan_ports[i]) + free_idx = i; + } + + if (free_idx == -1) + return; + + nfp_net_set_vxlan_port(nn, free_idx, port); +} + +static void nfp_net_del_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) + if (nn->vxlan_ports[i] == port) + nfp_net_set_vxlan_port(nn, i, 0); +} + +static struct net_device_ops nfp_net_netdev_ops = { + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_features = nfp_net_set_features, + .ndo_features_check = nfp_net_features_check, + .ndo_add_vxlan_port = nfp_net_add_vxlan_port, + .ndo_del_vxlan_port = nfp_net_del_vxlan_port, +}; + +/** + * nfp_net_info() - Print general info about the NIC + * @nn: NFP Net device to reconfigure + */ +void nfp_net_info(struct nfp_net *nn) +{ + nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx", + nn->is_vf ? "VF " : "", + nn->num_tx_rings, nn->max_tx_rings, + nn->num_rx_rings, nn->max_rx_rings); + nn_info(nn, "VER: %#x, Maximum supported MTU: %d\n", + nn->ver, nn->max_mtu); + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn->cap, + nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", + nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", + nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", + nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", + nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", + nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : ""); +} + +/** + * nfp_net_netdev_alloc() - Allocate netdev and related structure + * @pdev: PCI device + * @max_tx_rings: Maximum number of TX rings supported by device + * @max_rx_rings: Maximum number of RX rings supported by device + * + * This function allocates a netdev device and fills in the initial + * part of the @struct nfp_net structure. + * + * Return: NFP Net device structure, or ERR_PTR on error. + */ +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings) +{ + struct net_device *netdev; + struct nfp_net *nn; + int nqs; + + netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), + max_tx_rings, max_rx_rings); + if (!netdev) + return ERR_PTR(-ENOMEM); + + SET_NETDEV_DEV(netdev, &pdev->dev); + nn = netdev_priv(netdev); + + nn->netdev = netdev; + nn->pdev = pdev; + + nn->max_tx_rings = max_tx_rings; + nn->max_rx_rings = max_rx_rings; + + nqs = netif_get_num_default_rss_queues(); + nn->num_tx_rings = min_t(int, nqs, max_tx_rings); + nn->num_rx_rings = min_t(int, nqs, max_rx_rings); + + nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; + nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; + + spin_lock_init(&nn->reconfig_lock); + + return nn; +} + +/** + * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did + * @nn: NFP Net device to reconfigure + */ +void nfp_net_netdev_free(struct nfp_net *nn) +{ + free_netdev(nn->netdev); +} + +/** + * nfp_net_netdev_init() - Initialise/finalise the netdev structure + * @netdev: netdev structure + * + * Return: 0 on success or negative errno on error. + */ +int nfp_net_netdev_init(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i, err; + + /* Get some of the read-only fields from the BAR */ + nn->ver = nn_readl(nn, NFP_NET_CFG_VERSION); + nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); + nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); + + nfp_net_write_mac_addr(nn, nn->netdev->dev_addr); + + /* Set default MTU and Freelist buffer size */ + if (nn->max_mtu < NFP_NET_DEFAULT_MTU) + netdev->mtu = nn->max_mtu; + else + netdev->mtu = NFP_NET_DEFAULT_MTU; + nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ; + + /* Advertise/enable offloads based on capabilities + * + * Note: netdev->features show the currently enabled features + * and netdev->hw_features advertises which features are + * supported. By default we enable most features. + */ + netdev->hw_features = NETIF_F_HIGHDMA; + if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { + netdev->hw_features |= NETIF_F_RXCSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { + netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_SCATTER && + nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->ctrl |= NFP_NET_CFG_CTRL_SCATTER | NFP_NET_CFG_CTRL_GATHER; + } + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + netdev->hw_features |= NETIF_F_RXHASH | NETIF_F_NTUPLE; + nn->ctrl |= NFP_NET_CFG_CTRL_RSS; + } + if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; + } + + netdev->vlan_features = netdev->hw_features; + + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; + nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + } + + netdev->features = netdev->hw_features; + + /* Advertise but disable TSO by default. */ + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && + nn->cap & NFP_NET_CFG_CTRL_NVGRE) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL; + + /* Advertise features we support on encapsulated packets */ + netdev->hw_enc_features = + netdev->hw_features & (NETIF_F_IP_CSUM | + NETIF_F_IPV6_CSUM | + NETIF_F_TSO | + NETIF_F_TSO6 | + NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL); + + nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; + } + + /* Allow L2 Broadcast through by default, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_L2BC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; + + /* Allow IRQ moderation, if supported */ + if (nn->pdev->msix_enabled && (nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + + /* On NFP-3200 enable MSI-X auto-masking, if supported and the + * interrupts are not shared. + */ + if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO && + nn->per_vector_masking) + nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO; + + /* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */ + if ((nn->ver & NFP_NET_CFG_VERSION_MAJOR_MASK) >= + NFP_NET_CFG_VERSION_MAJOR(2)) + nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); + else + nn->rx_offset = NFP_NET_RX_OFFSET; + + /* Generate some random bits for RSS and write to device */ + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + get_random_bytes(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, + nn->rss_key[i / sizeof(u32)]); + } + + /* Stash the re-configuration queue away. First odd queue in TX Bar */ + nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; + + /* Make sure the FW knows the netdev is supposed to be disabled here */ + nn_writel(nn, NFP_NET_CFG_CTRL, 0); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + err = nfp_net_reconfig( + nn, NFP_NET_CFG_UPDATE_RING | NFP_NET_CFG_UPDATE_GEN); + if (err) + goto err_reconfig; + + /* Finalise the netdev setup */ + ether_setup(netdev); + netdev->netdev_ops = &nfp_net_netdev_ops; + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + nfp_net_set_ethtool_ops(netdev); + + err = register_netdev(netdev); + if (err) + return err; + + nfp_net_irqs_assign(netdev); + + return 0; + +err_reconfig: + return err; +} + +/** + * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. + * @netdev: netdev structure + */ +void nfp_net_netdev_clean(struct net_device *netdev) +{ + unregister_netdev(netdev); +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h new file mode 100644 index 000000000000..6a7c0a0fa7f2 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -0,0 +1,318 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ctrl.h + * Netronome network device driver: Control BAR layout + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#ifndef _NFP_NET_CTRL_H_ +#define _NFP_NET_CTRL_H_ + +/* IMPORTANT: This header file is shared with the FW, + * no OS specific constructs, please! + */ + +/** + * Configuration BAR size. + * + * The configuration BAR is 8K in size, but on the NFP6000, due to + * THB-350, 32k needs to be reserved. + */ +#define NFP_NET_CFG_BAR_SZ (32 * 1024) + +/** + * Offset in Freelist buffer where packet starts on RX + */ +#define NFP_NET_RX_OFFSET 32 + +/** + * Maximum header size supported for LSO frames + */ +#define NFP_NET_LSO_MAX_HDR_SZ 255 + +/** + * Hash type pre-pended when a RSS hash was computed + */ +#define NFP_NET_RSS_NONE 0 +#define NFP_NET_RSS_IPV4 1 +#define NFP_NET_RSS_IPV6 2 +#define NFP_NET_RSS_IPV6_EX 3 +#define NFP_NET_RSS_IPV4_TCP 4 +#define NFP_NET_RSS_IPV6_TCP 5 +#define NFP_NET_RSS_IPV6_EX_TCP 6 +#define NFP_NET_RSS_IPV4_UDP 7 +#define NFP_NET_RSS_IPV6_UDP 8 +#define NFP_NET_RSS_IPV6_EX_UDP 9 + +/** + * @NFP_NET_TXR_MAX: Maximum number of TX rings + * @NFP_NET_TXR_MASK: Mask for TX rings + * @NFP_NET_RXR_MAX: Maximum number of RX rings + * @NFP_NET_RXR_MASK: Mask for RX rings + */ +#define NFP_NET_TXR_MAX 64 +#define NFP_NET_TXR_MASK (NFP_NET_TXR_MAX - 1) +#define NFP_NET_RXR_MAX 64 +#define NFP_NET_RXR_MASK (NFP_NET_RXR_MAX - 1) + +/** + * Read/Write config words (0x0000 - 0x002c) + * @NFP_NET_CFG_CTRL: Global control + * @NFP_NET_CFG_UPDATE: Indicate which fields are updated + * @NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings + * @NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings + * @NFP_NET_CFG_MTU: Set MTU size + * @NFP_NET_CFG_FLBUFSZ: Set freelist buffer size (must be larger than MTU) + * @NFP_NET_CFG_EXN: MSI-X table entry for exceptions + * @NFP_NET_CFG_LSC: MSI-X table entry for link state changes + * @NFP_NET_CFG_MACADDR: MAC address + * + * TODO: + * - define Error details in UPDATE + */ +#define NFP_NET_CFG_CTRL 0x0000 +#define NFP_NET_CFG_CTRL_ENABLE (0x1 << 0) /* Global enable */ +#define NFP_NET_CFG_CTRL_PROMISC (0x1 << 1) /* Enable Promisc mode */ +#define NFP_NET_CFG_CTRL_L2BC (0x1 << 2) /* Allow L2 Broadcast */ +#define NFP_NET_CFG_CTRL_L2MC (0x1 << 3) /* Allow L2 Multicast */ +#define NFP_NET_CFG_CTRL_RXCSUM (0x1 << 4) /* Enable RX Checksum */ +#define NFP_NET_CFG_CTRL_TXCSUM (0x1 << 5) /* Enable TX Checksum */ +#define NFP_NET_CFG_CTRL_RXVLAN (0x1 << 6) /* Enable VLAN strip */ +#define NFP_NET_CFG_CTRL_TXVLAN (0x1 << 7) /* Enable VLAN insert */ +#define NFP_NET_CFG_CTRL_SCATTER (0x1 << 8) /* Scatter DMA */ +#define NFP_NET_CFG_CTRL_GATHER (0x1 << 9) /* Gather DMA */ +#define NFP_NET_CFG_CTRL_LSO (0x1 << 10) /* LSO/TSO */ +#define NFP_NET_CFG_CTRL_RINGCFG (0x1 << 16) /* Ring runtime changes */ +#define NFP_NET_CFG_CTRL_RSS (0x1 << 17) /* RSS */ +#define NFP_NET_CFG_CTRL_IRQMOD (0x1 << 18) /* Interrupt moderation */ +#define NFP_NET_CFG_CTRL_RINGPRIO (0x1 << 19) /* Ring priorities */ +#define NFP_NET_CFG_CTRL_MSIXAUTO (0x1 << 20) /* MSI-X auto-masking */ +#define NFP_NET_CFG_CTRL_TXRWB (0x1 << 21) /* Write-back of TX ring*/ +#define NFP_NET_CFG_CTRL_L2SWITCH (0x1 << 22) /* L2 Switch */ +#define NFP_NET_CFG_CTRL_L2SWITCH_LOCAL (0x1 << 23) /* Switch to local */ +#define NFP_NET_CFG_CTRL_VXLAN (0x1 << 24) /* VXLAN tunnel support */ +#define NFP_NET_CFG_CTRL_NVGRE (0x1 << 25) /* NVGRE tunnel support */ +#define NFP_NET_CFG_UPDATE 0x0004 +#define NFP_NET_CFG_UPDATE_GEN (0x1 << 0) /* General update */ +#define NFP_NET_CFG_UPDATE_RING (0x1 << 1) /* Ring config change */ +#define NFP_NET_CFG_UPDATE_RSS (0x1 << 2) /* RSS config change */ +#define NFP_NET_CFG_UPDATE_TXRPRIO (0x1 << 3) /* TX Ring prio change */ +#define NFP_NET_CFG_UPDATE_RXRPRIO (0x1 << 4) /* RX Ring prio change */ +#define NFP_NET_CFG_UPDATE_MSIX (0x1 << 5) /* MSI-X change */ +#define NFP_NET_CFG_UPDATE_L2SWITCH (0x1 << 6) /* Switch changes */ +#define NFP_NET_CFG_UPDATE_RESET (0x1 << 7) /* Update due to FLR */ +#define NFP_NET_CFG_UPDATE_IRQMOD (0x1 << 8) /* IRQ mod change */ +#define NFP_NET_CFG_UPDATE_VXLAN (0x1 << 9) /* VXLAN port change */ +#define NFP_NET_CFG_UPDATE_ERR (0x1 << 31) /* A error occurred */ +#define NFP_NET_CFG_TXRS_ENABLE 0x0008 +#define NFP_NET_CFG_RXRS_ENABLE 0x0010 +#define NFP_NET_CFG_MTU 0x0018 +#define NFP_NET_CFG_FLBUFSZ 0x001c +#define NFP_NET_CFG_EXN 0x001f +#define NFP_NET_CFG_LSC 0x0020 +#define NFP_NET_CFG_MACADDR 0x0024 + +/** + * Read-only words (0x0030 - 0x0050): + * @NFP_NET_CFG_VERSION: Firmware version number + * @NFP_NET_CFG_STS: Status + * @NFP_NET_CFG_CAP: Capabilities (same bits as @NFP_NET_CFG_CTRL) + * @NFP_NET_MAX_TXRINGS: Maximum number of TX rings + * @NFP_NET_MAX_RXRINGS: Maximum number of RX rings + * @NFP_NET_MAX_MTU: Maximum support MTU + * @NFP_NET_CFG_START_TXQ: Start Queue Control Queue to use for TX (PF only) + * @NFP_NET_CFG_START_RXQ: Start Queue Control Queue to use for RX (PF only) + * + * TODO: + * - define more STS bits + */ +#define NFP_NET_CFG_VERSION 0x0030 +#define NFP_NET_CFG_VERSION_RESERVED_MASK (0xff << 24) +#define NFP_NET_CFG_VERSION_CLASS_MASK (0xff << 16) +#define NFP_NET_CFG_VERSION_CLASS(x) (((x) & 0xff) << 16) +#define NFP_NET_CFG_VERSION_CLASS_GENERIC 0 +#define NFP_NET_CFG_VERSION_MAJOR_MASK (0xff << 8) +#define NFP_NET_CFG_VERSION_MAJOR(x) (((x) & 0xff) << 8) +#define NFP_NET_CFG_VERSION_MINOR_MASK (0xff << 0) +#define NFP_NET_CFG_VERSION_MINOR(x) (((x) & 0xff) << 0) +#define NFP_NET_CFG_STS 0x0034 +#define NFP_NET_CFG_STS_LINK (0x1 << 0) /* Link up or down */ +#define NFP_NET_CFG_CAP 0x0038 +#define NFP_NET_CFG_MAX_TXRINGS 0x003c +#define NFP_NET_CFG_MAX_RXRINGS 0x0040 +#define NFP_NET_CFG_MAX_MTU 0x0044 +/* Next two words are being used by VFs for solving THB350 issue */ +#define NFP_NET_CFG_START_TXQ 0x0048 +#define NFP_NET_CFG_START_RXQ 0x004c + +/** + * NFP-3200 workaround (0x0050 - 0x0058) + * @NFP_NET_CFG_SPARE_ADDR: DMA address for ME code to use (e.g. YDS-155 fix) + */ +#define NFP_NET_CFG_SPARE_ADDR 0x0050 +/** + * NFP6000/NFP4000 - Prepend configuration + */ +#define NFP_NET_CFG_RX_OFFSET 0x0050 +#define NFP_NET_CFG_RX_OFFSET_DYNAMIC 0 /* Prepend mode */ + +#define NFP_NET_CFG_VXLAN_PORT 0x0060 +#define NFP_NET_CFG_VXLAN_SZ 0x0008 + +/** + * 64B reserved for future use (0x0080 - 0x00c0) + */ +#define NFP_NET_CFG_RESERVED 0x0080 +#define NFP_NET_CFG_RESERVED_SZ 0x0040 + +/** + * RSS configuration (0x0100 - 0x01ac): + * Used only when NFP_NET_CFG_CTRL_RSS is enabled + * @NFP_NET_CFG_RSS_CFG: RSS configuration word + * @NFP_NET_CFG_RSS_KEY: RSS "secret" key + * @NFP_NET_CFG_RSS_ITBL: RSS indirection table + */ +#define NFP_NET_CFG_RSS_BASE 0x0100 +#define NFP_NET_CFG_RSS_CTRL NFP_NET_CFG_RSS_BASE +#define NFP_NET_CFG_RSS_MASK (0x7f) +#define NFP_NET_CFG_RSS_MASK_of(_x) ((_x) & 0x7f) +#define NFP_NET_CFG_RSS_IPV4 (1 << 8) /* RSS for IPv4 */ +#define NFP_NET_CFG_RSS_IPV6 (1 << 9) /* RSS for IPv6 */ +#define NFP_NET_CFG_RSS_IPV4_TCP (1 << 10) /* RSS for IPv4/TCP */ +#define NFP_NET_CFG_RSS_IPV4_UDP (1 << 11) /* RSS for IPv4/UDP */ +#define NFP_NET_CFG_RSS_IPV6_TCP (1 << 12) /* RSS for IPv6/TCP */ +#define NFP_NET_CFG_RSS_IPV6_UDP (1 << 13) /* RSS for IPv6/UDP */ +#define NFP_NET_CFG_RSS_TOEPLITZ (1 << 24) /* Use Toeplitz hash */ +#define NFP_NET_CFG_RSS_KEY (NFP_NET_CFG_RSS_BASE + 0x4) +#define NFP_NET_CFG_RSS_KEY_SZ 0x28 +#define NFP_NET_CFG_RSS_ITBL (NFP_NET_CFG_RSS_BASE + 0x4 + \ + NFP_NET_CFG_RSS_KEY_SZ) +#define NFP_NET_CFG_RSS_ITBL_SZ 0x80 + +/** + * TX ring configuration (0x200 - 0x800) + * @NFP_NET_CFG_TXR_BASE: Base offset for TX ring configuration + * @NFP_NET_CFG_TXR_ADDR: Per TX ring DMA address (8B entries) + * @NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries) + * @NFP_NET_CFG_TXR_SZ: Per TX ring ring size (1B entries) + * @NFP_NET_CFG_TXR_VEC: Per TX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_TXR_PRIO: Per TX ring priority (1B entries) + * @NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet + */ +#define NFP_NET_CFG_TXR_BASE 0x0200 +#define NFP_NET_CFG_TXR_ADDR(_x) (NFP_NET_CFG_TXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_WB_ADDR(_x) (NFP_NET_CFG_TXR_BASE + 0x200 + \ + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_SZ(_x) (NFP_NET_CFG_TXR_BASE + 0x400 + (_x)) +#define NFP_NET_CFG_TXR_VEC(_x) (NFP_NET_CFG_TXR_BASE + 0x440 + (_x)) +#define NFP_NET_CFG_TXR_PRIO(_x) (NFP_NET_CFG_TXR_BASE + 0x480 + (_x)) +#define NFP_NET_CFG_TXR_IRQ_MOD(_x) (NFP_NET_CFG_TXR_BASE + 0x500 + \ + ((_x) * 0x4)) + +/** + * RX ring configuration (0x0800 - 0x0c00) + * @NFP_NET_CFG_RXR_BASE: Base offset for RX ring configuration + * @NFP_NET_CFG_RXR_ADDR: Per RX ring DMA address (8B entries) + * @NFP_NET_CFG_RXR_SZ: Per RX ring ring size (1B entries) + * @NFP_NET_CFG_RXR_VEC: Per RX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_RXR_PRIO: Per RX ring priority (1B entries) + * @NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries) + */ +#define NFP_NET_CFG_RXR_BASE 0x0800 +#define NFP_NET_CFG_RXR_ADDR(_x) (NFP_NET_CFG_RXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_RXR_SZ(_x) (NFP_NET_CFG_RXR_BASE + 0x200 + (_x)) +#define NFP_NET_CFG_RXR_VEC(_x) (NFP_NET_CFG_RXR_BASE + 0x240 + (_x)) +#define NFP_NET_CFG_RXR_PRIO(_x) (NFP_NET_CFG_RXR_BASE + 0x280 + (_x)) +#define NFP_NET_CFG_RXR_IRQ_MOD(_x) (NFP_NET_CFG_RXR_BASE + 0x300 + \ + ((_x) * 0x4)) + +/** + * Interrupt Control/Cause registers (0x0c00 - 0x0d00) + * These registers are only used when MSI-X auto-masking is not + * enabled (@NFP_NET_CFG_CTRL_MSIXAUTO not set). The array is index + * by MSI-X entry and are 1B in size. If an entry is zero, the + * corresponding entry is enabled. If the FW generates an interrupt, + * it writes a cause into the corresponding field. This also masks + * the MSI-X entry and the host driver must clear the register to + * re-enable the interrupt. + */ +#define NFP_NET_CFG_ICR_BASE 0x0c00 +#define NFP_NET_CFG_ICR(_x) (NFP_NET_CFG_ICR_BASE + (_x)) +#define NFP_NET_CFG_ICR_UNMASKED 0x0 +#define NFP_NET_CFG_ICR_RXTX 0x1 +#define NFP_NET_CFG_ICR_LSC 0x2 + +/** + * General device stats (0x0d00 - 0x0d90) + * all counters are 64bit. + */ +#define NFP_NET_CFG_STATS_BASE 0x0d00 +#define NFP_NET_CFG_STATS_RX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x00) +#define NFP_NET_CFG_STATS_RX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x08) +#define NFP_NET_CFG_STATS_RX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x10) +#define NFP_NET_CFG_STATS_RX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x18) +#define NFP_NET_CFG_STATS_RX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x20) +#define NFP_NET_CFG_STATS_RX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x28) +#define NFP_NET_CFG_STATS_RX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x30) +#define NFP_NET_CFG_STATS_RX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x38) +#define NFP_NET_CFG_STATS_RX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x40) + +#define NFP_NET_CFG_STATS_TX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x48) +#define NFP_NET_CFG_STATS_TX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x50) +#define NFP_NET_CFG_STATS_TX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x58) +#define NFP_NET_CFG_STATS_TX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x60) +#define NFP_NET_CFG_STATS_TX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x68) +#define NFP_NET_CFG_STATS_TX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x70) +#define NFP_NET_CFG_STATS_TX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x78) +#define NFP_NET_CFG_STATS_TX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x80) +#define NFP_NET_CFG_STATS_TX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x88) + +/** + * Per ring stats (0x1000 - 0x1800) + * options, 64bit per entry + * @NFP_NET_CFG_TXR_STATS: TX ring statistics (Packet and Byte count) + * @NFP_NET_CFG_RXR_STATS: RX ring statistics (Packet and Byte count) + */ +#define NFP_NET_CFG_TXR_STATS_BASE 0x1000 +#define NFP_NET_CFG_TXR_STATS(_x) (NFP_NET_CFG_TXR_STATS_BASE + \ + ((_x) * 0x10)) +#define NFP_NET_CFG_RXR_STATS_BASE 0x1400 +#define NFP_NET_CFG_RXR_STATS(_x) (NFP_NET_CFG_RXR_STATS_BASE + \ + ((_x) * 0x10)) + +#endif /* _NFP_NET_CTRL_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c new file mode 100644 index 000000000000..4c97c713121c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -0,0 +1,235 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/rtnetlink.h> + +#include "nfp_net.h" + +static struct dentry *nfp_dir; + +static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_rx_ring *rx_ring = file->private; + int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!rx_ring->r_vec || !rx_ring->r_vec->nfp_net) + goto out; + nn = rx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + rxd_cnt = rx_ring->cnt; + + fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl); + fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl); + rx_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_rx); + rx_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + + seq_printf(file, "RX[%02d]: H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d RX_RD=%d RX_WR=%d\n", + rx_ring->idx, rx_ring->rd_p, rx_ring->wr_p, + fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p); + + for (i = 0; i < rxd_cnt; i++) { + rxd = &rx_ring->rxds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x", i, + rxd->vals[0], rxd->vals[1]); + + skb = READ_ONCE(rx_ring->rxbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + + if (rx_ring->rxbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &rx_ring->rxbufs[i].dma_addr); + + if (i == rx_ring->rd_p % rxd_cnt) + seq_puts(file, " H_RD "); + if (i == rx_ring->wr_p % rxd_cnt) + seq_puts(file, " H_WR "); + if (i == fl_rd_p % rxd_cnt) + seq_puts(file, " FL_RD"); + if (i == fl_wr_p % rxd_cnt) + seq_puts(file, " FL_WR"); + if (i == rx_rd_p % rxd_cnt) + seq_puts(file, " RX_RD"); + if (i == rx_wr_p % rxd_cnt) + seq_puts(file, " RX_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); +} + +static const struct file_operations nfp_rx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_rx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_tx_ring *tx_ring = file->private; + struct nfp_net_tx_desc *txd; + int d_rd_p, d_wr_p, txd_cnt; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!tx_ring->r_vec || !tx_ring->r_vec->nfp_net) + goto out; + nn = tx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + txd_cnt = tx_ring->cnt; + + d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); + + seq_printf(file, "TX[%02d]: H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n", + tx_ring->idx, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); + + for (i = 0; i < txd_cnt; i++) { + txd = &tx_ring->txds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, + txd->vals[0], txd->vals[1], + txd->vals[2], txd->vals[3]); + + skb = READ_ONCE(tx_ring->txbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + if (tx_ring->txbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &tx_ring->txbufs[i].dma_addr); + + if (i == tx_ring->rd_p % txd_cnt) + seq_puts(file, " H_RD"); + if (i == tx_ring->wr_p % txd_cnt) + seq_puts(file, " H_WR"); + if (i == d_rd_p % txd_cnt) + seq_puts(file, " D_RD"); + if (i == d_wr_p % txd_cnt) + seq_puts(file, " D_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); +} + +static const struct file_operations nfp_tx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_tx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ + static struct dentry *queues, *tx, *rx; + char int_name[16]; + int i; + + if (IS_ERR_OR_NULL(nfp_dir)) + return; + + nn->debugfs_dir = debugfs_create_dir(pci_name(nn->pdev), nfp_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + /* Create queue debugging sub-tree */ + queues = debugfs_create_dir("queue", nn->debugfs_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + rx = debugfs_create_dir("rx", queues); + tx = debugfs_create_dir("tx", queues); + if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx)) + return; + + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, rx, + &nn->rx_rings[i], &nfp_rx_q_fops); + } + + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, tx, + &nn->tx_rings[i], &nfp_tx_q_fops); + } +} + +void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ + debugfs_remove_recursive(nn->debugfs_dir); + nn->debugfs_dir = NULL; +} + +void nfp_net_debugfs_create(void) +{ + nfp_dir = debugfs_create_dir("nfp_net", NULL); +} + +void nfp_net_debugfs_destroy(void) +{ + debugfs_remove_recursive(nfp_dir); + nfp_dir = NULL; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c new file mode 100644 index 000000000000..062961fe3f7d --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -0,0 +1,704 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ethtool.c + * Netronome network device driver: ethtool support + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/ethtool.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/* Support for stats. Returns netdev, driver, and device stats */ +enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; +struct _nfp_net_et_stats { + char name[ETH_GSTRING_LEN]; + int type; + int sz; + int off; +}; + +#define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ + FIELD_SIZEOF(struct net_device_stats, m), \ + offsetof(struct net_device_stats, m) +/* For stats in the control BAR (other than Q stats) */ +#define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ + sizeof(u64), \ + (m) +static const struct _nfp_net_et_stats nfp_net_et_stats[] = { + /* netdev stats */ + {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, + {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, + {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, + {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, + {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, + {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, + {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, + {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, + {"multicast", NN_ET_NETDEV_STAT(multicast)}, + {"collisions", NN_ET_NETDEV_STAT(collisions)}, + {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, + {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, + {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, + {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, + {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, + {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, + {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, + {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, + /* Stats from the device */ + {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, + {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, + {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, + {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, + {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, + {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, + {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, + {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, + {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, + + {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, + {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, + {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, + {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, + {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, + {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, + {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, + {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, + {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, +}; + +#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) +#define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) +#define NN_ET_RVEC_GATHER_STATS 7 +#define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) +#define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ + NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) + +static void nfp_net_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + struct nfp_net *nn = netdev_priv(netdev); + + strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); + strlcpy(drvinfo->version, nfp_net_driver_version, + sizeof(drvinfo->version)); + + snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), + "%d.%d.%d.%d", + (nn->ver >> 24) & 0xff, (nn->ver >> 16) & 0xff, + (nn->ver >> 8) & 0xff, (nn->ver >> 0) & 0xff); + strlcpy(drvinfo->bus_info, pci_name(nn->pdev), + sizeof(drvinfo->bus_info)); + + drvinfo->n_stats = NN_ET_STATS_LEN; + drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + + ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; + ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; + ring->rx_pending = nn->rxd_cnt; + ring->tx_pending = nn->txd_cnt; +} + +static int nfp_net_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 rxd_cnt, txd_cnt; + + if (netif_running(netdev)) { + /* Some NIC drivers allow reconfiguration on the fly, + * some down the interface, change and then up it + * again. For now we don't allow changes when the + * device is up. + */ + nn_warn(nn, "Can't change rings while device is up\n"); + return -EBUSY; + } + + /* We don't have separate queues/rings for small/large frames. */ + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + /* Round up to supported values */ + rxd_cnt = roundup_pow_of_two(ring->rx_pending); + rxd_cnt = max_t(u32, rxd_cnt, NFP_NET_MIN_RX_DESCS); + rxd_cnt = min_t(u32, rxd_cnt, NFP_NET_MAX_RX_DESCS); + + txd_cnt = roundup_pow_of_two(ring->tx_pending); + txd_cnt = max_t(u32, txd_cnt, NFP_NET_MIN_TX_DESCS); + txd_cnt = min_t(u32, txd_cnt, NFP_NET_MAX_TX_DESCS); + + if (nn->rxd_cnt != rxd_cnt || nn->txd_cnt != txd_cnt) + nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", + nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); + + nn->rxd_cnt = rxd_cnt; + nn->txd_cnt = txd_cnt; + + return 0; +} + +static void nfp_net_get_strings(struct net_device *netdev, + u32 stringset, u8 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + u8 *p = data; + int i; + + switch (stringset) { + case ETH_SS_STATS: + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_r_vecs; i++) { + sprintf(p, "rvec_%u_rx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_busy", i); + p += ETH_GSTRING_LEN; + } + strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_gather", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_lso", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(p, "txq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "txq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(p, "rxq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rxq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + break; + } +} + +static void nfp_net_get_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct rtnl_link_stats64 *netdev_stats; + struct rtnl_link_stats64 temp; + u64 tmp[NN_ET_RVEC_GATHER_STATS]; + u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; + int i, j, k; + u8 __iomem *io_p; + u8 *p; + + netdev_stats = dev_get_stats(netdev, &temp); + + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + switch (nfp_net_et_stats[i].type) { + case NETDEV_ET_STATS: + p = (char *)netdev_stats + nfp_net_et_stats[i].off; + data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? + *(u64 *)p : *(u32 *)p; + break; + + case NFP_NET_DEV_ET_STATS: + io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; + data[i] = readq(io_p); + break; + } + } + for (j = 0; j < nn->num_r_vecs; j++) { + unsigned int start; + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); + data[i++] = nn->r_vecs[j].rx_pkts; + tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; + tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; + tmp[2] = nn->r_vecs[j].hw_csum_rx_error; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); + data[i++] = nn->r_vecs[j].tx_pkts; + data[i++] = nn->r_vecs[j].tx_busy; + tmp[3] = nn->r_vecs[j].hw_csum_tx; + tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; + tmp[5] = nn->r_vecs[j].tx_gather; + tmp[6] = nn->r_vecs[j].tx_lso; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); + + for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) + gathered_stats[k] += tmp[k]; + } + for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) + data[i++] = gathered_stats[j]; + for (j = 0; j < nn->num_tx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; + data[i++] = readq(io_p); + } + for (j = 0; j < nn->num_rx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; + data[i++] = readq(io_p); + } +} + +static int nfp_net_get_sset_count(struct net_device *netdev, int sset) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (sset) { + case ETH_SS_STATS: + return NN_ET_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +/* RX network flow classification (RSS, filters, etc) + */ +static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, + struct ethtool_rxnfc *cmd) +{ + cmd->data = 0; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + /* Report enabled RSS options */ + switch (cmd->flow_type) { + case TCP_V4_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV4_TCP) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + case UDP_V4_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV4_UDP) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + case IPV4_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV4) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + case TCP_V6_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV6_TCP) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + case UDP_V6_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV6_UDP) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + case IPV6_FLOW: + if (nn->rss_cfg & NFP_NET_CFG_RSS_IPV6) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int nfp_net_get_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd, u32 *rule_locs) +{ + struct nfp_net *nn = netdev_priv(netdev); + int ret = -EOPNOTSUPP; + + switch (cmd->cmd) { + case ETHTOOL_GRXRINGS: + cmd->data = nn->num_rx_rings; + return 0; + case ETHTOOL_GRXFH: + ret = nfp_net_get_rss_hash_opts(nn, cmd); + break; + default: + break; + } + + return ret; +} + +static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, + struct ethtool_rxnfc *nfc) +{ + u32 new_rss_cfg = nn->rss_cfg; + int err; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + /* RSS only supports IP SA/DA and L4 src/dst ports */ + if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | + RXH_L4_B_0_1 | RXH_L4_B_2_3)) + return -EINVAL; + + /* We need at least the IP SA/DA fields for hashing */ + if (!(nfc->data & RXH_IP_SRC) || + !(nfc->data & RXH_IP_DST)) + return -EINVAL; + + switch (nfc->flow_type) { + case TCP_V4_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV4_TCP; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV4_TCP; + break; + default: + return -EINVAL; + } + break; + case TCP_V6_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV6_TCP; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV6_TCP; + break; + default: + return -EINVAL; + } + break; + case UDP_V4_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV4_UDP; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV4_UDP; + break; + default: + return -EINVAL; + } + break; + case UDP_V6_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV6_UDP; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV6_UDP; + break; + default: + return -EINVAL; + } + break; + case IPV4_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV4; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV4; + break; + default: + return -EINVAL; + } + break; + case IPV6_FLOW: + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~NFP_NET_CFG_RSS_IPV6; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= NFP_NET_CFG_RSS_IPV6; + break; + default: + return -EINVAL; + } + break; + default: + return -EINVAL; + } + + new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; + new_rss_cfg |= NFP_NET_CFG_RSS_MASK; + + if (new_rss_cfg == nn->rss_cfg) + return 0; + + writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); + if (err) + return err; + + nn->rss_cfg = new_rss_cfg; + + nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); + return 0; +} + +static int nfp_net_set_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd) +{ + struct nfp_net *nn = netdev_priv(netdev); + int ret = -EOPNOTSUPP; + + switch (cmd->cmd) { + case ETHTOOL_SRXFH: + ret = nfp_net_set_rss_hash_opt(nn, cmd); + break; + default: + break; + } + + return ret; +} + +static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return 0; + + return ARRAY_SIZE(nn->rss_itbl); +} + +static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, + u8 *hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + if (indir) + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + indir[i] = nn->rss_itbl[i]; + + if (hfunc) + *hfunc = ETH_RSS_HASH_UNKNOWN; + + return 0; +} + +static int nfp_net_set_rxfh(struct net_device *netdev, + const u32 *indir, const u8 *key, + const u8 hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || + !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP) || + key) + return -EOPNOTSUPP; + if (!indir) + return 0; + + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + nn->rss_itbl[i] = indir[i]; + + nfp_net_rss_write_itbl(nn); + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); +} + +/* Dump BAR registers + */ +static int nfp_net_get_regs_len(struct net_device *netdev) +{ + return NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_regs(struct net_device *netdev, + struct ethtool_regs *regs, void *p) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 *regs_buf = p; + int i; + + regs->version = nn->ver; + + for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) + regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); +} + +static int nfp_net_get_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->pdev->msix_enabled && (nn->cap & NFP_NET_CFG_CTRL_IRQMOD))) + return -EINVAL; + + ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; + ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; + ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; + ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; + + return 0; +} + +static int nfp_net_set_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int factor; + + if (ec->rx_coalesce_usecs_irq || + ec->rx_max_coalesced_frames_irq || + ec->tx_coalesce_usecs_irq || + ec->tx_max_coalesced_frames_irq || + ec->stats_block_coalesce_usecs || + ec->use_adaptive_rx_coalesce || + ec->use_adaptive_tx_coalesce || + ec->pkt_rate_low || + ec->rx_coalesce_usecs_low || + ec->rx_max_coalesced_frames_low || + ec->tx_coalesce_usecs_low || + ec->tx_max_coalesced_frames_low || + ec->pkt_rate_high || + ec->rx_coalesce_usecs_high || + ec->rx_max_coalesced_frames_high || + ec->tx_coalesce_usecs_high || + ec->tx_max_coalesced_frames_high || + ec->rate_sample_interval) + return -ENOTSUPP; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* Each pair of (usecs, max_frames) fields specifies that interrupts + * should be coalesced until + * (usecs > 0 && time_since_first_completion >= usecs) || + * (max_frames > 0 && completed_frames >= max_frames) + * + * It is illegal to set both usecs and max_frames to zero as this would + * cause interrupts to never be generated. To disable coalescing, set + * usecs = 0 and max_frames = 1. + * + * Some implementations ignore the value of max_frames and use the + * condition time_since_first_completion >= usecs + */ + + if (!(nn->pdev->msix_enabled && (nn->cap & NFP_NET_CFG_CTRL_IRQMOD))) + return -EINVAL; + + /* ensure valid configuration */ + if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) + return -EINVAL; + + if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) + return -EINVAL; + + if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + /* configuration is valid */ + nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; + nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; + nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; + nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; + + /* write configuration to device */ + nfp_net_coalesce_write_cfg(nn); + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); +} + +static const struct ethtool_ops nfp_net_ethtool_ops = { + .get_drvinfo = nfp_net_get_drvinfo, + .get_ringparam = nfp_net_get_ringparam, + .set_ringparam = nfp_net_set_ringparam, + .get_strings = nfp_net_get_strings, + .get_ethtool_stats = nfp_net_get_stats, + .get_sset_count = nfp_net_get_sset_count, + .get_rxnfc = nfp_net_get_rxnfc, + .set_rxnfc = nfp_net_set_rxnfc, + .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, + .get_rxfh = nfp_net_get_rxfh, + .set_rxfh = nfp_net_set_rxfh, + .get_regs_len = nfp_net_get_regs_len, + .get_regs = nfp_net_get_regs, + .get_coalesce = nfp_net_get_coalesce, + .set_coalesce = nfp_net_set_coalesce, +}; + +void nfp_net_set_ethtool_ops(struct net_device *netdev) +{ + netdev->ethtool_ops = &nfp_net_ethtool_ops; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c new file mode 100644 index 000000000000..7f2b9a2e9c03 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c @@ -0,0 +1,404 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_netvf_main.c + * Netronome virtual function network device driver: Main entry point + * Author: Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/etherdevice.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +const char nfp_net_driver_name[] = "nfp_netvf"; +const char nfp_net_driver_version[] = "0.1"; +#define PCI_DEVICE_NFP6000VF 0x6003 +static const struct pci_device_id nfp_netvf_pci_device_ids[] = { + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { 0, } /* Required last entry. */ +}; +MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids); + +static void nfp_netvf_get_mac_addr(struct nfp_net *nn) +{ + u8 mac_addr[ETH_ALEN]; + + put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]); + /* We can't do readw for NFP-3200 compatibility */ + put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16, + &mac_addr[4]); + + if (!is_valid_ether_addr(mac_addr)) { + eth_hw_addr_random(nn->netdev); + return; + } + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); +} + +static int nfp_netvf_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + int max_tx_rings, max_rx_rings; + u32 tx_bar_off, rx_bar_off; + u32 tx_bar_sz, rx_bar_sz; + int tx_bar_no, rx_bar_no; + u8 __iomem *ctrl_bar; + struct nfp_net *nn; + int is_nfp3200; + u32 version; + u32 startq; + int stride; + int err; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + err = pci_request_regions(pdev, nfp_net_driver_name); + if (err) { + dev_err(&pdev->dev, "Unable to allocate device memory.\n"); + goto err_pci_regions; + } + + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + is_nfp3200 = 0; + break; + default: + err = -ENODEV; + goto err_dma_mask; + } + + pci_set_master(pdev); + + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS)); + if (err) + goto err_dma_mask; + + /* Map the Control BAR. + * + * Irrespective of the advertised BAR size we only map the + * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code + * the identical for PF and VF drivers. + */ + ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CRTL_BAR), + NFP_NET_CFG_BAR_SZ); + if (!ctrl_bar) { + dev_err(&pdev->dev, + "Failed to map resource %d\n", NFP_NET_CRTL_BAR); + err = -EIO; + goto err_dma_mask; + } + + /* Determine stride */ + version = readl(ctrl_bar + NFP_NET_CFG_VERSION); + + if ((NFP_NET_CFG_VERSION_CLASS_MASK & version) != + NFP_NET_CFG_VERSION_CLASS(NFP_NET_CFG_VERSION_CLASS_GENERIC)) { + /* We only support the Generic Class */ + dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n", + (version >> 24) & 0xff, (version >> 16) & 0xff, + (version >> 8) & 0xff, (version >> 0) & 0xff); + err = -EINVAL; + goto err_nn_init; + } + + if (version == 0x00000000 || + version == 0x00000001 || + version == 0x00001248) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n"); + } else { + switch (NFP_NET_CFG_VERSION_MAJOR_MASK & version) { + case NFP_NET_CFG_VERSION_MAJOR(1): + case NFP_NET_CFG_VERSION_MAJOR(2): + if (is_nfp3200) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + } else { + stride = 4; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = tx_bar_no; + } + break; + default: + dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n", + (version >> 24) & 0xff, (version >> 16) & 0xff, + (version >> 8) & 0xff, (version >> 0) & 0xff); + err = -EINVAL; + goto err_nn_init; + } + } + + /* Find out how many rings are supported */ + max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS); + max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS); + + tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride; + rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride; + + /* Sanity checks */ + if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) { + dev_err(&pdev->dev, + "TX BAR too small for number of TX rings. Adjusting"); + tx_bar_sz = pci_resource_len(pdev, tx_bar_no); + max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) { + dev_err(&pdev->dev, + "RX BAR too small for number of RX rings. Adjusting"); + rx_bar_sz = pci_resource_len(pdev, rx_bar_no); + max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + + /* XXX Implement a workaround for THB-350 here. Ideally, we + * have a different PCI ID for A rev VFs. + */ + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tx_bar_off = NFP_PCIE_QUEUE(startq); + startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + rx_bar_off = NFP_PCIE_QUEUE(startq); + break; + default: + err = -ENODEV; + goto err_nn_init; + } + + /* Allocate and initialise the netdev */ + nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings); + if (IS_ERR(nn)) { + err = PTR_ERR(nn); + goto err_nn_init; + } + + nn->ver = version; + nn->ctrl_bar = ctrl_bar; + nn->is_vf = 1; + nn->is_nfp3200 = is_nfp3200; + nn->stride_tx = stride; + nn->stride_rx = stride; + + if (rx_bar_no == tx_bar_no) { + u32 bar_off, bar_sz; + resource_size_t map_addr; + + /* Make a single overlapping BAR mapping */ + if (tx_bar_off < rx_bar_off) + bar_off = tx_bar_off; + else + bar_off = rx_bar_off; + + if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz)) + bar_sz = (tx_bar_off + tx_bar_sz) - bar_off; + else + bar_sz = (rx_bar_off + rx_bar_sz) - bar_off; + + map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off; + nn->q_bar = ioremap_nocache(map_addr, bar_sz); + if (!nn->q_bar) { + nn_err(nn, "Failed to map resource %d", tx_bar_no); + err = -EIO; + goto err_barmap_tx; + } + + /* TX queues */ + nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off); + /* RX queues */ + nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off); + } else { + resource_size_t map_addr; + + /* TX queues */ + map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off; + nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz); + if (!nn->tx_bar) { + nn_err(nn, "Failed to map resource %d", tx_bar_no); + err = -EIO; + goto err_barmap_tx; + } + + /* RX queues */ + map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off; + nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz); + if (!nn->rx_bar) { + nn_err(nn, "Failed to map resource %d", rx_bar_no); + err = -EIO; + goto err_barmap_rx; + } + } + + nfp_netvf_get_mac_addr(nn); + + err = nfp_net_irqs_alloc(nn); + if (!err) { + nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n"); + err = -EIO; + goto err_irqs_alloc; + } + + if (pdev->msix_enabled) { + nn->msix_table = nfp_net_msix_map(pdev, 255); + if (!nn->msix_table) { + err = -EIO; + goto err_map_msix_table; + } + } + + /* Get ME clock frequency from ctrl BAR + * XXX for now frequency is hardcoded until we figure out how + * to get the value from nfp-hwinfo into ctrl bar + */ + nn->me_freq_mhz = 1200; + + err = nfp_net_netdev_init(nn->netdev); + if (err) + goto err_netdev_init; + + pci_set_drvdata(pdev, nn); + + nfp_net_info(nn); + nfp_net_debugfs_adapter_add(nn); + + return 0; + +err_netdev_init: + if (nn->msix_table) + iounmap(nn->msix_table); +err_map_msix_table: + nfp_net_irqs_disable(nn); +err_irqs_alloc: + if (!nn->q_bar) + iounmap(nn->rx_bar); +err_barmap_rx: + if (!nn->q_bar) + iounmap(nn->tx_bar); + else + iounmap(nn->q_bar); +err_barmap_tx: + pci_set_drvdata(pdev, NULL); + nfp_net_netdev_free(nn); +err_nn_init: + iounmap(ctrl_bar); +err_dma_mask: + pci_release_regions(pdev); +err_pci_regions: + pci_disable_device(pdev); + return err; +} + +static void nfp_netvf_pci_remove(struct pci_dev *pdev) +{ + struct nfp_net *nn = pci_get_drvdata(pdev); + + /* Note, the order is slightly different from above as we need + * to keep the nn pointer around till we have freed everything. + */ + nfp_net_debugfs_adapter_del(nn); + + nn->removing_pdev = 1; + nfp_net_netdev_clean(nn->netdev); + + if (nn->msix_table) + iounmap(nn->msix_table); + nfp_net_irqs_disable(nn); + + if (!nn->q_bar) { + iounmap(nn->rx_bar); + iounmap(nn->tx_bar); + } else { + iounmap(nn->q_bar); + } + iounmap(nn->ctrl_bar); + + pci_set_drvdata(pdev, NULL); + + nfp_net_netdev_free(nn); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver nfp_netvf_pci_driver = { + .name = nfp_net_driver_name, + .id_table = nfp_netvf_pci_device_ids, + .probe = nfp_netvf_pci_probe, + .remove = nfp_netvf_pci_remove, +}; + +static int __init nfp_netvf_init(void) +{ + int err; + + pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n", + nfp_net_driver_name); + + nfp_net_debugfs_create(); + err = pci_register_driver(&nfp_netvf_pci_driver); + if (err) { + nfp_net_debugfs_destroy(); + return err; + } + + return 0; +} + +static void __exit nfp_netvf_exit(void) +{ + pci_unregister_driver(&nfp_netvf_pci_driver); + nfp_net_debugfs_destroy(); +} + +module_init(nfp_netvf_init); +module_exit(nfp_netvf_exit); + +MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NFP VF network device driver"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* Re: [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-10-27 18:15 ` [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski @ 2015-10-30 10:27 ` David Miller 2015-11-23 11:04 ` [PATCH net-next v3 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 0 siblings, 1 reply; 17+ messages in thread From: David Miller @ 2015-10-30 10:27 UTC (permalink / raw) To: jakub.kicinski; +Cc: netdev, rolf.neugebauer, jason.mcmullan, simon.horman From: Jakub Kicinski <jakub.kicinski@netronome.com> Date: Tue, 27 Oct 2015 18:15:58 +0000 > + * @msix_table: Pointer to mapped MSI-X table The PCI layer already has the MSI-X table mapped, and provides common routines for masking and unmasking MSI-X interrupts. Please use that instead of reimplementing those facilities. ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v3 0/2] Netronome NFP4000/NFP6000 NIC VF driver 2015-10-30 10:27 ` David Miller @ 2015-11-23 11:04 ` Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 0 siblings, 2 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-11-23 11:04 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski This patchset adds support for VFs of Netronome's NFP-4000 and NFP-6000 based NICs. We are currently also preparing the submission for the PF driver, but it is not quite ready yet. The PF driver can be found on GitHub: https://github.com/Netronome/nfp-drv-kmods changes since v2: Per DaveM comment I've dropped the code which was managing the MSI-X table from the driver side, but I still had to open code unmasking since no appropriate core function is exported. There were quite a few small changes to this series since v2, if anyone is interested in the full changelog - previous revision was based on 16ecade76a89 ("nfp_net_main: Correct some minor issues") in the GitHub repo, this is based on HEAD. Jakub Kicinski (2): pci_ids: add Netronome Systems vendor net: add driver for Netronome NFP4000/NFP6000 NIC VFs MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 33 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 767 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2472 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 +++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 +++ include/linux/pci_ids.h | 2 + 13 files changed, 4879 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c -- 1.9.1 ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v3 1/2] pci_ids: add Netronome Systems vendor 2015-11-23 11:04 ` [PATCH net-next v3 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski @ 2015-11-23 11:04 ` Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 1 sibling, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-11-23 11:04 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add PCI vendor id for Netronome Systems. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- include/linux/pci_ids.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index d9ba49cedc5d..1acbefc4bbda 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2495,6 +2495,8 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF2 0x1700 #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff +#define PCI_VENDOR_ID_NETRONOME 0x19ee + #define PCI_VENDOR_ID_QMI 0x1a32 #define PCI_VENDOR_ID_AZWAVE 0x1a3b -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-11-23 11:04 ` [PATCH net-next v3 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski @ 2015-11-23 11:04 ` Jakub Kicinski 2015-11-24 19:25 ` David Miller 1 sibling, 1 reply; 17+ messages in thread From: Jakub Kicinski @ 2015-11-23 11:04 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add driver for Virtual Functions for the Netronome's NFP-4000 and NFP-6000 based NICs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 34 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 757 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2459 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 +++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 +++ 12 files changed, 4855 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c diff --git a/MAINTAINERS b/MAINTAINERS index ea1751283b49..1c7bfab4a926 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7364,6 +7364,13 @@ F: include/net/netrom.h F: include/uapi/linux/netrom.h F: net/netrom/ +NETRONOME ETHERNET DRIVERS +M: Jakub Kicinski <jakub.kicinski@netronome.com> +M: Rolf Neugebauer <rolf.neugebauer@netronome.com> +L: oss-drivers@netronome.com +S: Maintained +F: drivers/net/ethernet/netronome/ + NETWORK BLOCK DEVICE (NBD) M: Markus Pargmann <mpa@pengutronix.de> S: Maintained diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 955d06b9cdba..e57304397d33 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -121,6 +121,7 @@ config FEALNX cards. <http://www.myson.com.tw/> source "drivers/net/ethernet/natsemi/Kconfig" +source "drivers/net/ethernet/netronome/Kconfig" source "drivers/net/ethernet/8390/Kconfig" config NET_NETX diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 4a2ee98738f0..99ede51adf10 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_NET_VENDOR_MOXART) += moxa/ obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/ obj-$(CONFIG_FEALNX) += fealnx.o obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/ +obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/ obj-$(CONFIG_NET_NETX) += netx-eth.o obj-$(CONFIG_NET_VENDOR_NUVOTON) += nuvoton/ obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/ diff --git a/drivers/net/ethernet/netronome/Kconfig b/drivers/net/ethernet/netronome/Kconfig new file mode 100644 index 000000000000..f9f1d180199d --- /dev/null +++ b/drivers/net/ethernet/netronome/Kconfig @@ -0,0 +1,34 @@ +# +# Netronome device configuration +# + +config NET_VENDOR_NETRONOME + bool "Netronome(R) devices" + default y + ---help--- + If you have a Netronome(R) network (Ethernet) card or device, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Netronome(R) cards. If you say Y, you will be + asked for your specific card in the following questions. + +if NET_VENDOR_NETRONOME + +config NFP_NETVF + tristate "Netronome(R) NFP4000/NFP6000 VF NIC driver" + depends on PCI && PCI_MSI + depends on VXLAN || VXLAN=n + ---help--- + This driver supports SR-IOV virtual functions of + the Netronome(R) NFP4000/NFP6000 cards working as + a advanced Ethernet NIC. + +config NFP_NET_DEBUG + bool "Debug support for Netronome(R) NFP4000/NFP6000 NIC drivers" + depends on NFP_NETVF + ---help--- + Enable debugfs support, debug messages and extra sanity checks + in Netronome(R) NFP4000/NFP6000 NIC drivers. + +endif diff --git a/drivers/net/ethernet/netronome/Makefile b/drivers/net/ethernet/netronome/Makefile new file mode 100644 index 000000000000..dcb7b383f634 --- /dev/null +++ b/drivers/net/ethernet/netronome/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Netronome network device drivers +# + +obj-$(CONFIG_NFP_NETVF) += nfp/ diff --git a/drivers/net/ethernet/netronome/nfp/Makefile b/drivers/net/ethernet/netronome/nfp/Makefile new file mode 100644 index 000000000000..68178819ff12 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/Makefile @@ -0,0 +1,8 @@ +obj-$(CONFIG_NFP_NETVF) += nfp_netvf.o + +nfp_netvf-objs := \ + nfp_net_common.o \ + nfp_net_ethtool.o \ + nfp_netvf_main.o + +nfp_netvf-$(CONFIG_NFP_NET_DEBUG) += nfp_net_debugfs.o diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h new file mode 100644 index 000000000000..39e64996f341 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -0,0 +1,757 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net.h + * Declarations for Netronome network device driver. + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#ifndef _NFP_NET_H_ +#define _NFP_NET_H_ + +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <asm-generic/io-64-nonatomic-hi-lo.h> + +#include "nfp_net_ctrl.h" + +#ifdef CONFIG_NFP_NET_DEBUG +#define DEBUG +#endif + +#define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args) +#define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args) +#define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_warn_ratelimit(nn, fmt, args...) \ + do { \ + if (unlikely(net_ratelimit())) \ + netdev_warn((nn)->netdev, fmt, ## args); \ + } while (0) + +#ifdef CONFIG_NFP_NET_DEBUG +#define nn_dbg(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_assert(cond, fmt, args...) \ + do { \ + if (unlikely(!(cond))) { \ + pr_err("assertion %s failed: %s:%d\n", \ + #cond, __func__, __LINE__); \ + pr_err(fmt, ## args); \ + BUG(); \ + } \ + } while (0) +#else +#define nn_dbg(nn, fmt, args...) do { } while (0) +#define nn_assert(cond, fmt, args...) do { } while (0) +#endif + +/* Max time to wait for NFP to respond on updates (in ms) */ +#define NFP_NET_POLL_TIMEOUT 5000 + +/* Bar allocation */ +#define NFP_NET_CRTL_BAR 0 +#define NFP_NET_Q0_BAR 2 +#define NFP_NET_Q1_BAR 4 /* OBSOLETE */ + +/* Max bits in DMA address */ +#define NFP_NET_MAX_DMA_BITS 40 + +/* Default size for MTU and freelist buffer sizes */ +#define NFP_NET_DEFAULT_MTU 1500 +#define NFP_NET_DEFAULT_RX_BUFSZ 2048 + +/* Maximum number of bytes prepended to a packet */ +#define NFP_NET_MAX_PREPEND 64 + +/* Interrupt definitions */ +#define NFP_NET_NON_Q_VECTORS 2 +#define NFP_NET_IRQ_LSC_IDX 0 +#define NFP_NET_IRQ_EXN_IDX 1 + +/* Queue/Ring definitions */ +#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ +#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ + +#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ +#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ +#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ +#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ + +#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ +#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ + +#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ + +/* Offload definitions */ +#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) + +/* Workaround definitions */ +#define NFP_NET_FL_KICK_BATCH 32 /* FW buffer consumption batch size */ + +/* Forward declarations */ +struct nfp_net; +struct nfp_net_r_vector; + +/* Convenience macro for writing dma address into RX/TX descriptors */ +#define nfp_desc_set_dma_addr(desc, dma_addr) \ + do { \ + __typeof(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ + __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ + } while (0) + +/* TX descriptor format */ + +#define PCIE_DESC_TX_EOP BIT(7) +#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) +#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) + +/* Flags in the host TX descriptor */ +#define PCIE_DESC_TX_CSUM BIT(7) +#define PCIE_DESC_TX_IP4_CSUM BIT(6) +#define PCIE_DESC_TX_TCP_CSUM BIT(5) +#define PCIE_DESC_TX_UDP_CSUM BIT(4) +#define PCIE_DESC_TX_VLAN BIT(3) +#define PCIE_DESC_TX_LSO BIT(2) +#define PCIE_DESC_TX_ENCAP BIT(1) +#define PCIE_DESC_TX_O_IP4_CSUM BIT(0) + +struct nfp_net_tx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of host buf address */ + __le16 dma_len; /* Length to DMA for this desc */ + u8 offset_eop; /* Offset in buf where pkt starts + + * highest bit is eop flag. + */ + __le32 dma_addr_lo; /* Low 32bit of host buf addr */ + + __le16 mss; /* MSS to be used for LSO */ + u8 l4_offset; /* LSO, where the L4 data starts */ + u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ + + __le16 vlan; /* VLAN tag to add if indicated */ + __le16 data_len; /* Length of frame + meta data */ + } __packed; + __le32 vals[4]; + }; +}; + +/** + * struct nfp_net_tx_buf - software TX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) + * @pkt_cnt: Number of packets to be produced out of the skb associated + * with this buffer (valid only on the head's buffer). + * Will be 1 for all non-TSO packets. + * @real_len: Number of bytes which to be produced out of the skb (valid only + * on the head's buffer). Equal to skb->len for non-TSO packets. + */ +struct nfp_net_tx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; + short int fidx; + u16 pkt_cnt; + u32 real_len; +}; + +/** + * struct nfp_net_tx_ring - TX ring structure + * @r_vec: Back pointer to ring vector structure + * @idx: Ring index from Linux's perspective + * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue + * @qcp_q: Pointer to base of the QCP TX queue + * @cnt: Size of the queue in number of descriptors + * @wr_p: TX ring write pointer (free running) + * @rd_p: TX ring read pointer (free running) + * @qcp_rd_p: Local copy of QCP TX queue read pointer + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for .xmit_more delayed kick) + * @txbufs: Array of transmitted TX buffers, to free on transmit + * @txds: Virtual address of TX ring in host memory + * @dma: DMA address of the TX ring + * @size: Size, in bytes, of the TX ring (needed to free) + */ +struct nfp_net_tx_ring { + struct nfp_net_r_vector *r_vec; + + int idx; + int qcidx; + u8 __iomem *qcp_q; + + int cnt; + u32 wr_p; + u32 rd_p; + u32 qcp_rd_p; + + u32 wr_ptr_add; + + struct nfp_net_tx_buf *txbufs; + struct nfp_net_tx_desc *txds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/* RX and freelist descriptor format */ + +#define PCIE_DESC_RX_DD BIT(7) +#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) + +/* Flags in the RX descriptor */ +#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) +#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) +#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) +#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) +#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) +#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) +#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) +#define PCIE_DESC_RX_SPARE cpu_to_le16(BIT(8)) +#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) +#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) +#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) +#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) +#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) +#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) +#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) +#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) + +#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ + PCIE_DESC_RX_TCP_CSUM | \ + PCIE_DESC_RX_UDP_CSUM | \ + PCIE_DESC_RX_I_IP4_CSUM | \ + PCIE_DESC_RX_I_TCP_CSUM | \ + PCIE_DESC_RX_I_UDP_CSUM) +#define PCIE_DESC_RX_CSUM_OK_SHIFT 1 +#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) +#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ + PCIE_DESC_RX_CSUM_OK_SHIFT) + +struct nfp_net_rx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of the buf address */ + __le16 reserved; /* Must be zero */ + u8 meta_len_dd; /* Must be zero */ + + __le32 dma_addr_lo; /* Low bits of the buffer address */ + } __packed fld; + + struct { + __le16 data_len; /* Length of the frame + meta data */ + u8 reserved; + u8 meta_len_dd; /* Length of meta data prepended + + * descriptor done flag. + */ + + __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ + __le16 vlan; /* VLAN if stripped */ + } __packed rxd; + + __le32 vals[2]; + }; +}; + +struct nfp_net_rx_hash { + __be32 hash_type; + __be32 hash; +}; + +/** + * struct nfp_net_rx_ring - RX ring structure + * @r_vec: Back pointer to ring vector structure + * @cnt: Size of the queue in number of descriptors + * @wr_p: FL/RX ring write pointer (free running) + * @rd_p: FL/RX ring read pointer (free running) + * @idx: Ring index from Linux's perspective + * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist + * @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue + * @qcp_fl: Pointer to base of the QCP freelist queue + * @qcp_rx: Pointer to base of the QCP RX queue + * @rxbufs: Array of transmitted FL/RX buffers + * @rxds: Virtual address of FL/RX ring in host memory + * @dma: DMA address of the FL/RX ring + * @size: Size, in bytes, of the FL/RX ring (needed to free) + */ +struct nfp_net_rx_ring { + struct nfp_net_r_vector *r_vec; + + int cnt; + u32 wr_p; + u32 rd_p; + + int idx; + int fl_qcidx; + int rx_qcidx; + u8 __iomem *qcp_fl; + u8 __iomem *qcp_rx; + + struct { + struct sk_buff *skb; + dma_addr_t dma_addr; + } *rxbufs; + + struct nfp_net_rx_desc *rxds; + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/** + * struct nfp_net_r_vector - Per ring interrupt vector configuration + * @nfp_net: Backpointer to nfp_net structure + * @napi: NAPI structure for this ring vec + * @tx_ring: Pointer to TX ring + * @rx_ring: Pointer to RX ring + * @irq_idx: Index into MSI-X table + * @rx_sync: Seqlock for atomic updates of RX stats + * @rx_pkts: Number of received packets + * @rx_bytes: Number of received bytes + * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK + * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK + * @hw_csum_rx_error: Counter of packets with bad checksums + * @tx_sync: Seqlock for atomic updates of TX stats + * @tx_pkts: Number of Transmitted packets + * @tx_bytes: Number of Transmitted bytes + * @hw_csum_tx: Counter of packets with TX checksum offload requested + * @hw_csum_tx_inner: Counter of inner TX checksum offload requests + * @tx_gather: Counter of packets with Gather DMA + * @tx_lso: Counter of LSO packets sent + * @tx_errors: How many TX errors were encountered + * @tx_busy: How often was TX busy (no space)? + * @handler: Interrupt handler for this ring vector + * @name: Name of the interrupt vector + * @affinity_mask: SMP affinity mask for this vector + * + * This structure ties RX and TX rings to interrupt vectors and a NAPI + * context. This currently only supports one RX and TX ring per + * interrupt vector but might be extended in the future to allow + * association of multiple rings per vector. + */ +struct nfp_net_r_vector { + struct nfp_net *nfp_net; + struct napi_struct napi; + + struct nfp_net_tx_ring *tx_ring; + struct nfp_net_rx_ring *rx_ring; + + int irq_idx; + + struct u64_stats_sync rx_sync; + u64 rx_pkts; + u64 rx_bytes; + u64 hw_csum_rx_ok; + u64 hw_csum_rx_inner_ok; + u64 hw_csum_rx_error; + + struct u64_stats_sync tx_sync; + u64 tx_pkts; + u64 tx_bytes; + u64 hw_csum_tx; + u64 hw_csum_tx_inner; + u64 tx_gather; + u64 tx_lso; + u64 tx_errors; + u64 tx_busy; + + irq_handler_t handler; + char name[IFNAMSIZ + 8]; + cpumask_t affinity_mask; +} ____cacheline_aligned; + +/* Firmware version as it is written in the 32bit value in the BAR */ +struct nfp_net_fw_version { + u8 minor; + u8 major; + u8 class; + u8 resv; +} __packed; + +static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, + u8 resv, u8 class, u8 major, u8 minor) +{ + return fw_ver->resv == resv && + fw_ver->class == class && + fw_ver->major == major && + fw_ver->minor == minor; +} + +/** + * struct nfp_net - NFP network device structure + * @pdev: Backpointer to PCI device + * @netdev: Backpointer to net_device structure + * @nfp_fallback: Is the driver used in fallback mode? + * @is_vf: Is the driver attached to a VF? + * @is_nfp3200: Is the driver for a NFP-3200 card? + * @fw_loaded: Is the firmware loaded? + * @ctrl: Local copy of the control register/word. + * @fl_bufsz: Currently configured size of the freelist buffers + * @rx_offset: Offset in the RX buffers where packet data starts + * @cpp: Pointer to the CPP handle + * @nfp_dev_cpp: Pointer to the NFP Device handle + * @ctrl_area: Pointer to the CPP area for the control BAR + * @tx_area: Pointer to the CPP area for the TX queues + * @rx_area: Pointer to the CPP area for the FL/RX queues + * @fw_ver: Firmware version + * @cap: Capabilities advertised by the Firmware + * @max_mtu: Maximum support MTU advertised by the Firmware + * @rss_cfg: RSS configuration + * @rss_key: RSS secret key + * @rss_itbl: RSS indirection table + * @max_tx_rings: Maximum number of TX rings supported by the Firmware + * @max_rx_rings: Maximum number of RX rings supported by the Firmware + * @num_tx_rings: Currently configured number of TX rings + * @num_rx_rings: Currently configured number of RX rings + * @txd_cnt: Size of the TX ring in number of descriptors + * @rxd_cnt: Size of the RX ring in number of descriptors + * @tx_rings: Array of pre-allocated TX ring structures + * @rx_rings: Array of pre-allocated RX ring structures + * @num_irqs: Number of allocated interrupt vectors + * @num_r_vecs: Number of used ring vectors + * @r_vecs: Pre-allocated array of ring vectors + * @irq_entries: Pre-allocated array of MSI-X entries + * @lsc_handler: Handler for Link State Change interrupt + * @lsc_name: Name for Link State Change interrupt + * @exn_handler: Handler for Exception interrupt + * @exn_name: Name for Exception interrupt + * @shared_handler: Handler for shared interrupts + * @shared_name: Name for shared interrupt + * @me_freq_mhz: ME clock_freq (MHz) + * @reconfig_lock: Protects HW reconfiguration request regs/machinery + * @link_up: Is the link up? + * @link_status_lock: Protects @link_up and ensures atomicity with BAR reading + * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter + * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter + * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter + * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter + * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW + * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts + * @qcp_cfg: Pointer to QCP queue used for configuration notification + * @ctrl_bar: Pointer to mapped control BAR + * @tx_bar: Pointer to mapped TX queues + * @rx_bar: Pointer to mapped FL/RX queues + * @debugfs_dir: Device directory in debugfs + */ +struct nfp_net { + struct pci_dev *pdev; + struct net_device *netdev; + + unsigned nfp_fallback:1; + unsigned is_vf:1; + unsigned is_nfp3200:1; + unsigned fw_loaded:1; + + u32 ctrl; + u32 fl_bufsz; + + u32 rx_offset; + +#ifdef CONFIG_PCI_IOV + unsigned int num_vfs; + struct vf_data_storage *vfinfo; + int vf_rate_link_speed; +#endif + + struct nfp_cpp *cpp; + struct platform_device *nfp_dev_cpp; + struct nfp_cpp_area *ctrl_area; + struct nfp_cpp_area *tx_area; + struct nfp_cpp_area *rx_area; + + struct nfp_net_fw_version fw_ver; + u32 cap; + u32 max_mtu; + + u32 rss_cfg; + u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; + u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; + + int max_tx_rings; + int max_rx_rings; + + int num_tx_rings; + int num_rx_rings; + + int stride_tx; + int stride_rx; + + int txd_cnt; + int rxd_cnt; + + struct nfp_net_tx_ring tx_rings[NFP_NET_MAX_TX_RINGS]; + struct nfp_net_rx_ring rx_rings[NFP_NET_MAX_RX_RINGS]; + + u8 num_irqs; + u8 num_r_vecs; + struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS]; + struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS + + NFP_NET_MAX_TX_RINGS]; + + irq_handler_t lsc_handler; + char lsc_name[IFNAMSIZ + 8]; + + irq_handler_t exn_handler; + char exn_name[IFNAMSIZ + 8]; + + irq_handler_t shared_handler; + char shared_name[IFNAMSIZ + 8]; + + u32 me_freq_mhz; + + bool link_up; + spinlock_t link_status_lock; + + spinlock_t reconfig_lock; + + u32 rx_coalesce_usecs; + u32 rx_coalesce_max_frames; + u32 tx_coalesce_usecs; + u32 tx_coalesce_max_frames; + + __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; + u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; + + u8 __iomem *qcp_cfg; + + u8 __iomem *ctrl_bar; + u8 __iomem *q_bar; + u8 __iomem *tx_bar; + u8 __iomem *rx_bar; + + struct dentry *debugfs_dir; +}; + +/* Functions to read/write from/to a BAR + * Performs any endian conversion necessary. + */ +static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) +{ + writeb(val, nn->ctrl_bar + off); +} + +/* NFP-3200 can't handle 16-bit accesses too well - hence no readw/writew */ + +static inline u32 nn_readl(struct nfp_net *nn, int off) +{ + return readl(nn->ctrl_bar + off); +} + +static inline void nn_writel(struct nfp_net *nn, int off, u32 val) +{ + writel(val, nn->ctrl_bar + off); +} + +static inline u64 nn_readq(struct nfp_net *nn, int off) +{ + return readq(nn->ctrl_bar + off); +} + +static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) +{ + writeq(val, nn->ctrl_bar + off); +} + +/* Flush posted PCI writes by reading something without side effects */ +static inline void nn_pci_flush(struct nfp_net *nn) +{ + nn_readl(nn, NFP_NET_CFG_VERSION); +} + +/* Queue Controller Peripheral access functions and definitions. + * + * Some of the BARs of the NFP are mapped to portions of the Queue + * Controller Peripheral (QCP) address space on the NFP. A QCP queue + * has a read and a write pointer (as well as a size and flags, + * indicating overflow etc). The QCP offers a number of different + * operation on queue pointers, but here we only offer function to + * either add to a pointer or to read the pointer value. + */ +#define NFP_QCP_QUEUE_ADDR_SZ 0x800 +#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) +#define NFP_QCP_QUEUE_ADD_RPTR 0x0000 +#define NFP_QCP_QUEUE_ADD_WPTR 0x0004 +#define NFP_QCP_QUEUE_STS_LO 0x0008 +#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff +#define NFP_QCP_QUEUE_STS_HI 0x000c +#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff + +/* The offset of a QCP queues in the PCIe Target (same on NFP3200 and NFP6000 */ +#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) + +/* nfp_qcp_ptr - Read or Write Pointer of a queue */ +enum nfp_qcp_ptr { + NFP_QCP_READ_PTR = 0, + NFP_QCP_WRITE_PTR +}; + +/* There appear to be an *undocumented* upper limit on the value which + * one can add to a queue and that value is either 0x3f or 0x7f. We + * go with 0x3f as a conservative measure. + */ +#define NFP_QCP_MAX_ADD 0x3f + +static inline void _nfp_qcp_ptr_add(u8 __iomem *q, + enum nfp_qcp_ptr ptr, u32 val) +{ + u32 off; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_ADD_RPTR; + else + off = NFP_QCP_QUEUE_ADD_WPTR; + + while (val > NFP_QCP_MAX_ADD) { + writel(NFP_QCP_MAX_ADD, q + off); + val -= NFP_QCP_MAX_ADD; + } + + writel(val, q + off); +} + +/** + * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); +} + +/** + * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); +} + +static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) +{ + u32 off; + u32 val; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_STS_LO; + else + off = NFP_QCP_QUEUE_STS_HI; + + val = readl(q + off); + + if (ptr == NFP_QCP_READ_PTR) + return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; + else + return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; +} + +/** + * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_READ_PTR); +} + +/** + * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); +} + +/* Globals */ +extern const char nfp_net_driver_name[]; +extern const char nfp_net_driver_version[]; + +/* Prototypes */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar); + +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings); +void nfp_net_netdev_free(struct nfp_net *nn); +int nfp_net_netdev_init(struct net_device *netdev); +void nfp_net_netdev_clean(struct net_device *netdev); +void nfp_net_set_ethtool_ops(struct net_device *netdev); +void nfp_net_info(struct nfp_net *nn); +int nfp_net_reconfig(struct nfp_net *nn, u32 update); +void nfp_net_rss_write_itbl(struct nfp_net *nn); +void nfp_net_rss_write_key(struct nfp_net *nn); +void nfp_net_coalesce_write_cfg(struct nfp_net *nn); +int nfp_net_irqs_alloc(struct nfp_net *nn); +void nfp_net_irqs_disable(struct nfp_net *nn); + +#ifdef CONFIG_NFP_NET_DEBUG +void nfp_net_debugfs_create(void); +void nfp_net_debugfs_destroy(void); +void nfp_net_debugfs_adapter_add(struct nfp_net *nn); +void nfp_net_debugfs_adapter_del(struct nfp_net *nn); +#else +static inline void nfp_net_debugfs_create(void) +{ +} + +static inline void nfp_net_debugfs_destroy(void) +{ +} + +static inline void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ +} + +static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ +} +#endif /* CONFIG_NFP_NET_DEBUG */ + +#endif /* _NFP_NET_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c new file mode 100644 index 000000000000..ba2e94a6cd11 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -0,0 +1,2459 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_common.c + * Netronome network device driver: Common functions between PF and VF + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + * Chris Telfer <chris.telfer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/ethtool.h> +#include <linux/log2.h> +#include <linux/if_vlan.h> +#include <linux/random.h> + +#include <linux/ktime.h> + +#include <net/vxlan.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/** + * nfp_net_get_fw_version() - Read and parse the FW version + * @fw_ver: Output fw_version structure to read to + * @ctrl_bar: Mapped address of the control BAR + */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar) +{ + u32 reg; + + reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); + put_unaligned_le32(reg, fw_ver); +} + +/** + * nfp_net_reconfig() - Reconfigure the firmware + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Write the update word to the BAR and ping the reconfig queue. The + * poll until the firmware has acknowledged the update by zeroing the + * update word. + * + * Return: Negative errno on error, 0 on success + */ +int nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int cnt, ret = 0; + u32 new; + + spin_lock_bh(&nn->reconfig_lock); + + nn_writel(nn, NFP_NET_CFG_UPDATE, update); + /* ensure update is written before pinging HW */ + nn_pci_flush(nn); + nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); + + /* Poll update field, waiting for NFP to ack the config */ + for (cnt = 0; ; cnt++) { + new = nn_readl(nn, NFP_NET_CFG_UPDATE); + if (new == 0) + break; + if (new & NFP_NET_CFG_UPDATE_ERR) { + nn_err(nn, "Reconfig error: 0x%08x\n", new); + ret = -EIO; + break; + } else if (cnt >= NFP_NET_POLL_TIMEOUT) { + nn_err(nn, "Reconfig timeout for 0x%08x after %dms\n", + update, cnt); + ret = -EIO; + break; + } + mdelay(1); + } + + spin_unlock_bh(&nn->reconfig_lock); + return ret; +} + +/* Interrupt configuration and handling + */ + +/** + * nfp_net_irq_unmask_msix() - Unmask MSI-X after automasking + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * Clear the MSI-X table mask bit for the given entry bypassing Linux irq + * handling subsystem. Use *only* to reenable automasked vectors. + */ +static void nfp_net_irq_unmask_msix(struct nfp_net *nn, unsigned int entry_nr) +{ + struct list_head *msi_head = &nn->pdev->dev.msi_list; + struct msi_desc *entry; + u32 off; + + /* All MSI-Xs have the same mask_base */ + entry = list_first_entry(msi_head, struct msi_desc, list); + + off = (PCI_MSIX_ENTRY_SIZE * entry_nr) + + PCI_MSIX_ENTRY_VECTOR_CTRL; + writel(0, entry->mask_base + off); + readl(entry->mask_base); +} + +/** + * nfp_net_irq_unmask() - Unmask automasked interrupt + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * If MSI-X auto-masking is enabled clear the mask bit, otherwise + * clear the ICR for the entry. + */ +static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) +{ + if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) { + nfp_net_irq_unmask_msix(nn, entry_nr); + return; + } + + nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); + nn_pci_flush(nn); +} + +/** + * nfp_net_msix_alloc() - Try to allocate MSI-X irqs + * @nn: NFP Network structure + * @nr_vecs: Number of MSI-X vectors to allocate + * + * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. + * + * Return: Number of MSI-X vectors obtained or 0 on error. + */ +static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) +{ + struct pci_dev *pdev = nn->pdev; + int nvecs; + int i; + + for (i = 0; i < nr_vecs; i++) + nn->irq_entries[i].entry = i; + + nvecs = pci_enable_msix_range(pdev, nn->irq_entries, + NFP_NET_NON_Q_VECTORS + 1, nr_vecs); + if (nvecs < 0) { + nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", + NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); + return 0; + } + + return nvecs; +} + +/** + * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want + * @nn: NFP Network structure + * + * We want a vector per CPU (or ring), whatever is smaller plus + * NFP_NET_NON_Q_VECTORS for LSC etc. + * + * Return: Number of interrupts wanted + */ +static int nfp_net_irqs_wanted(struct nfp_net *nn) +{ + int ncpus; + int vecs; + + ncpus = num_online_cpus(); + + vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); + vecs = min_t(int, vecs, ncpus); + + return vecs + NFP_NET_NON_Q_VECTORS; +} + +/** + * nfp_net_irqs_alloc() - allocates MSI-X irqs + * @nn: NFP Network structure + * + * Return: Number of irqs obtained or 0 on error. + */ +int nfp_net_irqs_alloc(struct nfp_net *nn) +{ + int wanted_irqs; + + wanted_irqs = nfp_net_irqs_wanted(nn); + + nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); + if (nn->num_irqs == 0) { + nn_err(nn, "Failed to allocate MSI-X IRQs\n"); + return 0; + } + + nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; + + if (nn->num_irqs < wanted_irqs) + nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", + wanted_irqs, nn->num_irqs); + + return nn->num_irqs; +} + +/** + * nfp_net_irqs_disable() - Disable interrupts + * @nn: NFP Network structure + * + * Undoes what @nfp_net_irqs_alloc() does. + */ +void nfp_net_irqs_disable(struct nfp_net *nn) +{ + pci_disable_msix(nn->pdev); +} + +/** + * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + + napi_schedule_irqoff(&r_vec->napi); + + /* The FW auto-masks any interrupt, either via the MASK bit in + * the MSI-X table or via the per entry ICR field. So there + * is no need to disable interrupts here. + */ + return IRQ_HANDLED; +} + +/** + * nfp_net_read_link_status() - Reread link status from control BAR + * @nn: NFP Network structure + */ +static void nfp_net_read_link_status(struct nfp_net *nn) +{ + unsigned long flags; + bool link_up; + u32 sts; + + spin_lock_irqsave(&nn->link_status_lock, flags); + + sts = nn_readl(nn, NFP_NET_CFG_STS); + link_up = !!(sts & NFP_NET_CFG_STS_LINK); + + if (nn->link_up == link_up) + goto out; + + nn->link_up = link_up; + + if (nn->link_up) { + netif_carrier_on(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Up\n"); + } else { + netif_carrier_off(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Down\n"); + } +out: + spin_unlock_irqrestore(&nn->link_status_lock, flags); +} + +/** + * nfp_net_irq_lsc() - Interrupt service routine for link state changes + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_lsc(int irq, void *data) +{ + struct nfp_net *nn = data; + + nfp_net_read_link_status(nn); + + nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); + + return IRQ_HANDLED; +} + +/** + * nfp_net_irq_exn() - Interrupt service routine for exceptions + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_exn(int irq, void *data) +{ + struct nfp_net *nn = data; + + nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); + /* XXX TO BE IMPLEMENTED */ + return IRQ_HANDLED; +} + +/** + * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring + * @tx_ring: TX ring structure + */ +static void nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + tx_ring->qcidx = tx_ring->idx * nn->stride_tx; + tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); +} + +/** + * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring + * @rx_ring: RX ring structure + */ +static void nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; + rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); + + rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); + rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); +} + +/** + * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. + * @netdev: netdev structure + */ +static void nfp_net_irqs_assign(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct nfp_net_r_vector *r_vec; + int r; + + nn_assert(nn->num_irqs > 0, "num_irqs is zero\n"); + nn_assert(nn->num_r_vecs > 0, "num_r_vecs is zero\n"); + + /* Assumes nn->num_tx_rings == nn->num_rx_rings */ + if (nn->num_tx_rings > nn->num_r_vecs) { + nn_warn(nn, "More rings (%d) than vectors (%d).\n", + nn->num_tx_rings, nn->num_r_vecs); + nn->num_tx_rings = nn->num_r_vecs; + nn->num_rx_rings = nn->num_r_vecs; + } + + nn->lsc_handler = nfp_net_irq_lsc; + nn->exn_handler = nfp_net_irq_exn; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + r_vec->nfp_net = nn; + r_vec->handler = nfp_net_irq_rxtx; + r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; + + cpumask_set_cpu(r, &r_vec->affinity_mask); + + r_vec->tx_ring = &nn->tx_rings[r]; + nn->tx_rings[r].idx = r; + nn->tx_rings[r].r_vec = r_vec; + nfp_net_tx_ring_init(r_vec->tx_ring); + + r_vec->rx_ring = &nn->rx_rings[r]; + nn->rx_rings[r].idx = r; + nn->rx_rings[r].r_vec = r_vec; + nfp_net_rx_ring_init(r_vec->rx_ring); + } +} + +/** + * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @format: printf-style format to construct the interrupt name + * @name: Pointer to allocated space for interrupt name + * @name_sz: Size of space for interrupt name + * @vector_idx: Index of MSI-X vector used for this interrupt + * @handler: IRQ handler to register for this interrupt + */ +static int +nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, + const char *format, char *name, size_t name_sz, + unsigned int vector_idx, irq_handler_t handler) +{ + struct msix_entry *entry; + int err; + + entry = &nn->irq_entries[vector_idx]; + + snprintf(name, name_sz, format, netdev_name(nn->netdev)); + err = request_irq(entry->vector, handler, 0, name, nn); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + entry->vector, err); + return err; + } + nn_writeb(nn, ctrl_offset, vector_idx); + + return 0; +} + +/** + * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @vector_idx: Index of MSI-X vector used for this interrupt + */ +static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, + unsigned int vector_idx) +{ + nn_writeb(nn, ctrl_offset, 0xff); + free_irq(nn->irq_entries[vector_idx].vector, nn); +} + +/* Transmit + * + * One queue controller peripheral queue is used for transmit. The + * driver en-queues packets for transmit by advancing the write + * pointer. The device indicates that packets have transmitted by + * advancing the read pointer. The driver maintains a local copy of + * the read and write pointer in @struct nfp_net_tx_ring. The driver + * keeps @wr_p in sync with the queue controller write pointer and can + * determine how many packets have been transmitted by comparing its + * copy of the read pointer @rd_p with the read pointer maintained by + * the queue controller peripheral. + */ + +/** + * nfp_net_tx_full() - Check if the TX ring is full + * @tx_ring: TX ring to check + * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) + * + * This function checks, based on the *host copy* of read/write + * pointer if a given TX ring is full. The real TX queue may have + * some newly made available slots. + * + * Return: True if the ring is full. + */ +static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) +{ + return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); +} + +/* Wrappers for deciding when to stop and restart TX queues */ +static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) +{ + return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); +} + +static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) +{ + return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); +} + +/** + * nfp_net_tx_ring_stop() - stop tx ring + * @nd_q: netdev queue + * @tx_ring: driver tx queue structure + * + * Safely stop TX ring. Remember that while we are running .start_xmit() + * someone else may be cleaning the TX ring completions so we need to be + * extra careful here. + */ +static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, + struct nfp_net_tx_ring *tx_ring) +{ + netif_tx_stop_queue(nd_q); + + /* We can race with the TX completion out of NAPI so recheck */ + smp_mb(); + if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) + netif_tx_start_queue(nd_q); +} + +/** + * nfp_net_tx_tso() - Set up Tx descriptor for LSO + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to HW TX descriptor + * @skb: Pointer to SKB + * + * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. + * Return error on packet header greater than maximum supported LSO header size. + */ +static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + u32 hdrlen; + u16 mss; + + if (!skb_is_gso(skb)) + return; + + if (!skb->encapsulation) + hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); + else + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; + txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); + + mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; + txd->l4_offset = hdrlen; + txd->mss = cpu_to_le16(mss); + txd->flags |= PCIE_DESC_TX_LSO; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_lso++; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to TX descriptor + * @skb: Pointer to SKB + * + * This function sets the TX checksum flags in the TX descriptor based + * on the configuration and the protocol of the packet to be transmitted. + */ +static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + struct ipv6hdr *ipv6h; + struct iphdr *iph; + u8 l4_hdr; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) + return; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return; + + txd->flags |= PCIE_DESC_TX_CSUM; + if (skb->encapsulation) + txd->flags |= PCIE_DESC_TX_ENCAP; + + iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); + ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); + + if (iph->version == 4) { + txd->flags |= PCIE_DESC_TX_IP4_CSUM; + l4_hdr = iph->protocol; + } else if (ipv6h->version == 6) { + l4_hdr = ipv6h->nexthdr; + } else { + nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", + iph->version); + return; + } + + switch (l4_hdr) { + case IPPROTO_TCP: + txd->flags |= PCIE_DESC_TX_TCP_CSUM; + break; + case IPPROTO_UDP: + txd->flags |= PCIE_DESC_TX_UDP_CSUM; + break; + default: + nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", + l4_hdr); + return; + } + + u64_stats_update_begin(&r_vec->tx_sync); + if (skb->encapsulation) + r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; + else + r_vec->hw_csum_tx += txbuf->pkt_cnt; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx() - Main transmit entry point + * @skb: SKB to transmit + * @netdev: netdev structure + * + * Return: NETDEV_TX_OK on success. + */ +static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + const struct skb_frag_struct *frag; + struct nfp_net_r_vector *r_vec; + struct nfp_net_tx_desc *txd, txdg; + struct nfp_net_tx_buf *txbuf; + struct nfp_net_tx_ring *tx_ring; + struct netdev_queue *nd_q; + dma_addr_t dma_addr; + unsigned int fsize; + int f, nr_frags; + int wr_idx; + u16 qidx; + + qidx = skb_get_queue_mapping(skb); + tx_ring = &nn->tx_rings[qidx]; + r_vec = tx_ring->r_vec; + nd_q = netdev_get_tx_queue(nn->netdev, qidx); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + nr_frags = skb_shinfo(skb)->nr_frags; + + if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { + nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", + qidx, tx_ring->wr_p, tx_ring->rd_p); + netif_tx_stop_queue(nd_q); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_busy++; + u64_stats_update_end(&r_vec->tx_sync); + return NETDEV_TX_BUSY; + } + + /* Start with the head skbuf */ + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), + DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_free; + + wr_idx = tx_ring->wr_p % tx_ring->cnt; + + /* Stash the soft descriptor of the head then initialize it */ + txbuf = &tx_ring->txbufs[wr_idx]; + txbuf->skb = skb; + txbuf->dma_addr = dma_addr; + txbuf->fidx = -1; + txbuf->pkt_cnt = 1; + txbuf->real_len = skb->len; + + /* Build TX descriptor */ + txd = &tx_ring->txds[wr_idx]; + txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; + txd->dma_len = cpu_to_le16(skb_headlen(skb)); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->data_len = cpu_to_le16(skb->len); + + txd->flags = 0; + txd->mss = 0; + txd->l4_offset = 0; + + nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); + + nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); + + if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { + txd->flags |= PCIE_DESC_TX_VLAN; + txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + } + + /* Gather DMA */ + if (nr_frags > 0) { + /* all descs must match except for in addr, length and eop */ + txdg = *txd; + + for (f = 0; f < nr_frags; f++) { + frag = &skb_shinfo(skb)->frags[f]; + fsize = skb_frag_size(frag); + + dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, + fsize, DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_unmap; + + wr_idx = (wr_idx + 1) % tx_ring->cnt; + tx_ring->txbufs[wr_idx].skb = skb; + tx_ring->txbufs[wr_idx].dma_addr = dma_addr; + tx_ring->txbufs[wr_idx].fidx = f; + + txd = &tx_ring->txds[wr_idx]; + *txd = txdg; + txd->dma_len = cpu_to_le16(fsize); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->offset_eop = + (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_gather++; + u64_stats_update_end(&r_vec->tx_sync); + } + + netdev_tx_sent_queue(nd_q, txbuf->real_len); + + tx_ring->wr_p += nr_frags + 1; + if (nfp_net_tx_ring_should_stop(tx_ring)) + nfp_net_tx_ring_stop(nd_q, tx_ring); + + tx_ring->wr_ptr_add += nr_frags + 1; + if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { + /* force memory write before we let HW know */ + wmb(); + nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); + tx_ring->wr_ptr_add = 0; + } + + skb_tx_timestamp(skb); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + return NETDEV_TX_OK; + +err_unmap: + --f; + while (f >= 0) { + frag = &skb_shinfo(skb)->frags[f]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[wr_idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; + wr_idx = wr_idx - 1; + if (wr_idx < 0) + wr_idx += tx_ring->cnt; + } + dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; +err_free: + nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_errors++; + u64_stats_update_end(&r_vec->tx_sync); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +/** + * nfp_net_tx_complete() - Handled completed TX packets + * @tx_ring: TX ring structure + * + * Return: Number of completed TX descriptors + */ +static int nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + u32 done_pkts = 0, done_bytes = 0; + int todo, completed = 0; + struct sk_buff *skb; + int nr_frags; + u32 qcp_rd_p; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + /* Work out how many descriptors have been transmitted */ + qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + + if (qcp_rd_p == tx_ring->qcp_rd_p) + return 0; + + if (qcp_rd_p > tx_ring->qcp_rd_p) + todo = qcp_rd_p - tx_ring->qcp_rd_p; + else + todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; + + while (todo > completed) { + idx = tx_ring->rd_p % tx_ring->cnt; + tx_ring->rd_p++; + completed++; + + skb = tx_ring->txbufs[idx].skb; + if (!skb) + continue; + + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + + done_pkts += tx_ring->txbufs[idx].pkt_cnt; + done_bytes += tx_ring->txbufs[idx].real_len; + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + tx_ring->qcp_rd_p = qcp_rd_p; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_bytes += done_bytes; + r_vec->tx_pkts += done_pkts; + u64_stats_update_end(&r_vec->tx_sync); + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); + if (nfp_net_tx_ring_should_wake(tx_ring)) { + /* Make sure TX thread will see updated tx_ring->rd_p */ + smp_mb(); + + if (unlikely(netif_tx_queue_stopped(nd_q))) + netif_tx_wake_queue(nd_q); + } + + return completed; +} + +/** + * nfp_net_tx_flush() - Free any untransmitted buffers currently on the TX ring + * @tx_ring: TX ring structure + * + * Assumes that the device is stopped + */ +static void nfp_net_tx_flush(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + struct sk_buff *skb; + int nr_frags; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + while (tx_ring->rd_p != tx_ring->wr_p) { + idx = tx_ring->rd_p % tx_ring->cnt; + + skb = tx_ring->txbufs[idx].skb; + if (skb) { + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), + DMA_TO_DEVICE); + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), + DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + memset(&tx_ring->txds[idx], 0, sizeof(tx_ring->txds[idx])); + + tx_ring->qcp_rd_p++; + tx_ring->rd_p++; + } + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_reset_queue(nd_q); +} + +static void nfp_net_tx_timeout(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < nn->num_tx_rings; i++) { + if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) + continue; + nn_warn(nn, "TX timeout on ring: %d\n", i); + } + nn_warn(nn, "TX watchdog timeout\n"); +} + +/* Receive processing + */ + +/** + * nfp_net_rx_space() - return the number of free slots on the RX ring + * @rx_ring: RX ring structure + * + * Make sure we leave at least one slot free. + * + * Return: True if there is space on the RX ring + */ +static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring) +{ + return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p); +} + +/** + * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors + * @flags: RX descriptor flags field in CPU byte order + */ +static int nfp_net_rx_csum_has_errors(u16 flags) +{ + u16 csum_all_checked, csum_all_ok; + + csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; + csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; + + return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); +} + +/** + * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags + * @nn: NFP Net device + * @r_vec: per-ring structure + * @rxd: Pointer to RX descriptor + * @skb: Pointer to SKB + */ +static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_rx_desc *rxd, struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + if (!(nn->netdev->features & NETIF_F_RXCSUM)) + return; + + if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_error++; + u64_stats_update_end(&r_vec->rx_sync); + return; + } + + /* Assume that the firmware will never report inner CSUM_OK unless outer + * L4 headers were successfully parsed. FW will always report zero UDP + * checksum as CSUM_OK. + */ + if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } + + if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_inner_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } +} + +/** + * nfp_net_set_hash() - Set SKB hash data + * @netdev: adapter's net_device structure + * @skb: SKB to set the hash data on + * @rxd: RX descriptor + * + * The RSS hash and hash-type are pre-pended to the packet data. + * Extract and decode it and set the skb fields. + */ +static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, + struct nfp_net_rx_desc *rxd) +{ + struct nfp_net_rx_hash *rx_hash; + + if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS) || + !(netdev->features & NETIF_F_RXHASH)) + return; + + rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); + + switch (be32_to_cpu(rx_hash->hash_type)) { + case NFP_NET_RSS_IPV4: + case NFP_NET_RSS_IPV6: + case NFP_NET_RSS_IPV6_EX: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3); + break; + default: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4); + break; + } +} + +/** + * nfp_net_rx() - receive up to @budget packets on @rx_ring + * @rx_ring: RX ring to receive from + * @budget: NAPI budget + * + * Note, this function is separated out from the napi poll function to + * more cleanly separate packet receive code from other bookkeeping + * functions performed in the napi poll function. + * + * There are differences between the NFP-3200 firmware and the + * NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue + * to indicate that new packets have arrived. The NFP-6000 does not + * have this queue and uses the DD bit in the RX descriptor. This + * method cannot be used on the NFP-3200 as it causes a race + * condition: The RX ring write pointer on the NFP-3200 is updated + * after packets (and descriptors) have been DMAed. If the DD bit is + * used and subsequently the read pointer is updated this may lead to + * the RX queue to underflow (if the firmware has not yet update the + * write pointer). Therefore we use slightly ugly conditional code + * below to handle the differences. We may, in the future update the + * NFP-3200 firmware to behave the same as the firmware on the + * NFP-6000. + * + * Return: Number of packets received. + */ +static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + unsigned int data_len, meta_len; + int avail = 0, pkts_polled = 0; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + u32 qcp_wr_p; + int idx; + + if (nn->is_nfp3200) { + /* Work out how many packets arrived */ + qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + idx = rx_ring->rd_p % rx_ring->cnt; + + if (qcp_wr_p == idx) + /* No new packets */ + return 0; + + if (qcp_wr_p > idx) + avail = qcp_wr_p - idx; + else + avail = qcp_wr_p + rx_ring->cnt - idx; + } else { + avail = budget + 1; + } + + while (avail > 0 && pkts_polled < budget) { + idx = rx_ring->rd_p % rx_ring->cnt; + + skb = rx_ring->rxbufs[idx].skb; + if (!skb) { + nn_err(nn, "No SKB with RX descriptor %d:%u\n", + rx_ring->idx, idx); + break; + } + + rxd = &rx_ring->rxds[idx]; + if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) { + if (nn->is_nfp3200) + nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n", + rx_ring->idx, idx, + rxd->vals[0], rxd->vals[1]); + break; + } + /* Memory barrier to ensure that we won't do other reads + * before the DD bit. + */ + dma_rmb(); + + nn_assert(le16_to_cpu(rxd->rxd.data_len) <= nn->fl_bufsz, + "RX data larger than freelist buffer (%u > %u) on %d:%u rxd[0]=%#x rxd[1]=%#x\n", + le16_to_cpu(rxd->rxd.data_len), nn->fl_bufsz, + rx_ring->idx, idx, rxd->vals[0], rxd->vals[1]); + + dma_unmap_single(&nn->pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + + meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; + data_len = le16_to_cpu(rxd->rxd.data_len); + + if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) { + /* The packet data starts after the metadata */ + skb_reserve(skb, meta_len); + } else { + /* The packet data starts at a fixed offset */ + skb_reserve(skb, nn->rx_offset); + } + + /* Adjust the SKB for the dynamic meta data pre-pended */ + skb_put(skb, data_len - meta_len); + + nfp_net_set_hash(nn->netdev, skb, rxd); + + /* Pad small frames to minimum */ + if (skb_put_padto(skb, 60)) + break; + + /* Stats update */ + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_pkts++; + r_vec->rx_bytes += skb->len; + u64_stats_update_end(&r_vec->rx_sync); + + skb_record_rx_queue(skb, rx_ring->idx); + skb->protocol = eth_type_trans(skb, nn->netdev); + + nfp_net_rx_csum(nn, r_vec, rxd, skb); + + if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + le16_to_cpu(rxd->rxd.vlan)); + + napi_gro_receive(&rx_ring->r_vec->napi, skb); + + /* Clear internal state to be on the safe side */ + rx_ring->rxbufs[idx].skb = NULL; + rx_ring->rxbufs[idx].dma_addr = 0; + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + pkts_polled++; + avail--; + } + + if (nn->is_nfp3200) + nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled); + + return pkts_polled; +} + +/** + * nfp_net_rx_freelist_alloc_one() - Allocate, map and write descriptors + * @rx_ring: RX add the buffer to + * + * This function will allcate a new skb, map it for DMA and write HW and SW + * descriptors. It will, however, *not* give the buffer to HW. + */ +static int nfp_net_rx_freelist_alloc_one(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + dma_addr_t dma_addr; + int wr_idx; + + skb = netdev_alloc_skb(nn->netdev, nn->fl_bufsz); + if (!skb) { + nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); + return -ENOMEM; + } + + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, + nn->fl_bufsz, DMA_FROM_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) { + dev_kfree_skb_any(skb); + nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); + return -ENOMEM; + } + + wr_idx = rx_ring->wr_p % rx_ring->cnt; + + /* Stash SKB and DMA address away */ + rx_ring->rxbufs[wr_idx].skb = skb; + rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; + + /* Fill freelist descriptor */ + rxd = &rx_ring->rxds[wr_idx]; + rxd->fld.meta_len_dd = 0; + nfp_desc_set_dma_addr(&rxd->fld, dma_addr); + rx_ring->wr_p++; + + return 0; +} + +/** + * nfp_net_rx_fill_freelist() - Attempt filling freelist with RX buffers + * @rx_ring: RX ring to fill + * + * Try to fill as many buffers as possible into freelist. Return + * number of buffers added. + * + * Return: Number of freelist buffers added. + */ +static int nfp_net_rx_fill_freelist(struct nfp_net_rx_ring *rx_ring) +{ + int added = 0; + int i; + + while (nfp_net_rx_space(rx_ring) >= NFP_NET_FL_BATCH) { + for (i = 0; i < NFP_NET_FL_BATCH; i++) { + if (nfp_net_rx_freelist_alloc_one(rx_ring)) + break; + } + + /* Update write pointer of the freelist queue. Make + * sure all writes are flushed before telling the hardware. + */ + wmb(); + nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, i); + added += i; + + /* stop on error */ + if (i < NFP_NET_FL_BATCH) + break; + } + + return added; +} + +/** + * nfp_net_rx_flush() - Free any buffers currently on the RX ring + * @rx_ring: RX ring to remove buffers from + * + * Assumes that the device is stopped + */ +static void nfp_net_rx_flush(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int idx; + + while (rx_ring->rd_p != rx_ring->wr_p) { + idx = rx_ring->rd_p % rx_ring->cnt; + + if (rx_ring->rxbufs[idx].skb) { + dma_unmap_single(&pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_ring->rxbufs[idx].skb); + rx_ring->rxbufs[idx].dma_addr = 0; + rx_ring->rxbufs[idx].skb = NULL; + } + + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + } +} + +/** + * nfp_net_poll() - napi poll function + * @napi: NAPI structure + * @budget: NAPI budget + * + * Return: 0 if done with polling. + */ +static int nfp_net_poll(struct napi_struct *napi, int budget) +{ + struct nfp_net_r_vector *r_vec = + container_of(napi, struct nfp_net_r_vector, napi); + struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; + struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring; + struct nfp_net *nn = r_vec->nfp_net; + struct netdev_queue *txq; + bool complete = true; + int pkts_completed; + int pkts_polled; + + /* Handle completed TX. If the TX queue was stopped, re-enable it */ + tx_ring = &nn->tx_rings[rx_ring->idx]; + txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + + pkts_completed = nfp_net_tx_complete(tx_ring); + if (pkts_completed) + complete = false; + + /* Receive any packets */ + pkts_polled = nfp_net_rx(rx_ring, budget); + if (pkts_polled) + complete = false; + + /* refill freelist */ + nfp_net_rx_fill_freelist(rx_ring); + + if (!complete) + return budget; + + /* If there are no more packets to receive and no more TX + * descriptors to be cleaned, unmask the MSI-X vector and + * switch NAPI back into interrupt mode. + */ + napi_complete_done(napi, pkts_polled); + + nfp_net_irq_unmask(nn, r_vec->irq_idx); + + return pkts_polled; +} + +/* Setup and Configuration + */ + +/** + * nfp_net_tx_ring_free() - Free resources allocated to a TX ring + * @tx_ring: TX ring to free + */ +static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), 0); + + kfree(tx_ring->txbufs); + + if (tx_ring->txds) + dma_free_coherent(&pdev->dev, tx_ring->size, + tx_ring->txds, tx_ring->dma); + + tx_ring->cnt = 0; + tx_ring->wr_p = 0; + tx_ring->rd_p = 0; + tx_ring->qcp_rd_p = 0; + + tx_ring->txbufs = NULL; + tx_ring->txds = NULL; + tx_ring->dma = 0; + tx_ring->size = 0; +} + +/** + * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring + * @tx_ring: TX Ring structure to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + tx_ring->cnt = nn->txd_cnt; + + tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; + tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->txds) + goto err_alloc; + + sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; + tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); + if (!tx_ring->txbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), tx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), ilog2(tx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), r_vec->irq_idx); + + netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); + + nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", + tx_ring->idx, tx_ring->qcidx, + tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); + + return 0; + +err_alloc: + nfp_net_tx_ring_free(tx_ring); + return -ENOMEM; +} + +/** + * nfp_net_rx_ring_free() - Free resources allocated to a RX ring + * @rx_ring: RX ring to free + */ +static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), 0); + + kfree(rx_ring->rxbufs); + + if (rx_ring->rxds) + dma_free_coherent(&pdev->dev, rx_ring->size, + rx_ring->rxds, rx_ring->dma); + + rx_ring->cnt = 0; + rx_ring->wr_p = 0; + rx_ring->rd_p = 0; + + rx_ring->rxbufs = NULL; + rx_ring->rxds = NULL; + rx_ring->dma = 0; + rx_ring->size = 0; +} + +/** + * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring + * @rx_ring: RX ring to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + rx_ring->cnt = nn->rxd_cnt; + + rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; + rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->rxds) + goto err_alloc; + + sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; + rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); + if (!rx_ring->rxbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), rx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), ilog2(rx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), r_vec->irq_idx); + + nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", + rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, + rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); + + return 0; + +err_alloc: + nfp_net_rx_ring_free(rx_ring); + return -ENOMEM; +} + +static void __nfp_net_free_rings(struct nfp_net *nn, unsigned int n_free) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + + while (n_free--) { + r_vec = &nn->r_vecs[n_free]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + nfp_net_rx_ring_free(r_vec->rx_ring); + nfp_net_tx_ring_free(r_vec->tx_ring); + + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); + + netif_napi_del(&r_vec->napi); + } +} + +/** + * nfp_net_free_rings() - Free all ring resources + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_free_rings(struct nfp_net *nn) +{ + __nfp_net_free_rings(nn, nn->num_r_vecs); +} + +/** + * nfp_net_alloc_rings() - Allocate resources for RX and TX rings + * @nn: NFP Net device to reconfigure + * + * Return: 0 on success or negative errno on error. + */ +static int nfp_net_alloc_rings(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + int err; + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + /* Setup NAPI */ + netif_napi_add(nn->netdev, &r_vec->napi, + nfp_net_poll, NAPI_POLL_WEIGHT); + + snprintf(r_vec->name, sizeof(r_vec->name), + "%s-rxtx-%d", nn->netdev->name, r); + err = request_irq(entry->vector, r_vec->handler, 0, + r_vec->name, r_vec); + if (err) { + nn_dbg(nn, "Error requesting IRQ %d\n", entry->vector); + goto err_napi_del; + } + + irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); + + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", + r, entry->vector, entry->entry); + + /* Allocate TX ring resources */ + err = nfp_net_tx_ring_alloc(r_vec->tx_ring); + if (err) + goto err_free_irq; + + /* Allocate RX ring resources */ + err = nfp_net_rx_ring_alloc(r_vec->rx_ring); + if (err) + goto err_free_tx; + } + + return 0; + +err_free_tx: + nfp_net_tx_ring_free(r_vec->tx_ring); +err_free_irq: + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); +err_napi_del: + netif_napi_del(&r_vec->napi); + __nfp_net_free_rings(nn, r); + return err; +} + +/** + * nfp_net_rss_write_itbl() - Write RSS indirection table to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_itbl(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, + get_unaligned_le32(nn->rss_itbl + i)); +} + +/** + * nfp_net_rss_write_key() - Write RSS hash key to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_key(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, + get_unaligned_le32(nn->rss_key + i)); +} + +/** + * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW + * @nn: NFP Net device to reconfigure + */ +void nfp_net_coalesce_write_cfg(struct nfp_net *nn) +{ + u8 i; + u32 factor; + u32 value; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* copy RX interrupt coalesce parameters */ + value = (nn->rx_coalesce_max_frames << 16) | + (factor * nn->rx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); + + /* copy TX interrupt coalesce parameters */ + value = (nn->tx_coalesce_max_frames << 16) | + (factor * nn->tx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); +} + +/** + * nfp_net_write_mac_addr() - Write mac address to device registers + * @nn: NFP Net device to reconfigure + * @mac: Six-byte MAC address to be written + * + * We do a bit of byte swapping dance because firmware is LE. + */ +static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) +{ + nn_writel(nn, NFP_NET_CFG_MACADDR + 0, + get_unaligned_be32(nn->netdev->dev_addr)); + /* We can't do writew for NFP-3200 compatibility */ + nn_writel(nn, NFP_NET_CFG_MACADDR + 4, + get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); +} + +/** + * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_clear_config_and_disable(struct nfp_net *nn) +{ + u32 new_ctrl, update; + int err; + + new_ctrl = nn->ctrl; + new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; + update = NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) { + nn_err(nn, "Could not disable device: %d\n", err); + return; + } + + nn->ctrl = new_ctrl; +} + +/** + * nfp_net_start_vec() - Start ring vector + * @nn: NFP Net device structure + * @r_vec: Ring vector to be started + */ +static int nfp_net_start_vec(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) +{ + unsigned int irq_vec, n; + int err = 0; + + irq_vec = nn->irq_entries[r_vec->irq_idx].vector; + + disable_irq(irq_vec); + + n = nfp_net_rx_fill_freelist(r_vec->rx_ring); + if (n < NFP_NET_FL_KICK_BATCH) { + /* The FW consumes free list buffers in batches. If we can't + * allocate enough buffers return an error as RX won't work. + */ + nn_err(nn, "RV%02d: couldn't allocate enough buffers\n", + r_vec->irq_idx); + nfp_net_rx_flush(r_vec->rx_ring); + err = -ENOMEM; + goto out; + } + nn_dbg(nn, "RV%02d RxQ%02d: Added %u freelist buffers\n", + r_vec->irq_idx, r_vec->rx_ring->idx, n); + + napi_enable(&r_vec->napi); +out: + enable_irq(irq_vec); + + return err; +} + +static int nfp_net_netdev_open(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err, r; + u32 update = 0; + u32 new_ctrl; + + if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { + nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); + return -EBUSY; + } + + new_ctrl = nn->ctrl; + + /* Step 1: Allocate resources for rings and the like + * - Request interrupts + * - Allocate RX and TX ring resources + * - Setup initial RSS table + */ + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", + nn->exn_name, sizeof(nn->exn_name), + NFP_NET_IRQ_EXN_IDX, nn->exn_handler); + if (err) + return err; + + err = nfp_net_alloc_rings(nn); + if (err) + goto err_free_exn; + + err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); + if (err) + goto err_free_rings; + + err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); + if (err) + goto err_free_rings; + + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + nfp_net_rss_write_key(nn); + nfp_net_rss_write_itbl(nn); + nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); + update |= NFP_NET_CFG_UPDATE_RSS; + } + + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_coalesce_write_cfg(nn); + + new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + update |= NFP_NET_CFG_UPDATE_IRQMOD; + } + + /* Step 2: Configure the NFP + * - Enable rings from 0 to tx_rings/rx_rings - 1. + * - Write MAC address (in case it changed) + * - Set the MTU + * - Set the Freelist buffer size + * - Enable the FW + */ + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); + + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); + + nfp_net_write_mac_addr(nn, netdev->dev_addr); + + nn_writel(nn, NFP_NET_CFG_MTU, netdev->mtu); + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); + + /* Enable device */ + new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; + update |= NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + goto err_clear_config; + + nn->ctrl = new_ctrl; + + /* Since reconfiguration requests while NFP is down are ignored we + * have to wipe the entire VXLAN configuration and reinitialize it. + */ + if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { + memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); + memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); + vxlan_get_rx_port(netdev); + } + + /* Step 3: Enable for kernel + * - put some freelist descriptors on each RX ring + * - enable NAPI on each ring + * - enable all TX queues + * - set link state + */ + for (r = 0; r < nn->num_r_vecs; r++) { + err = nfp_net_start_vec(nn, &nn->r_vecs[r]); + if (err) + goto err_disable_napi; + } + + netif_tx_wake_all_queues(netdev); + + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", + nn->lsc_name, sizeof(nn->lsc_name), + NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); + if (err) + goto err_stop_tx; + nfp_net_read_link_status(nn); + + return 0; + +err_stop_tx: + netif_tx_disable(netdev); + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); +err_disable_napi: + while (r--) { + napi_disable(&nn->r_vecs[r].napi); + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + } +err_clear_config: + nfp_net_clear_config_and_disable(nn); +err_free_rings: + nfp_net_free_rings(nn); +err_free_exn: + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + return err; +} + +/** + * nfp_net_netdev_close() - Called when the device is downed + * @netdev: netdev structure + */ +static int nfp_net_netdev_close(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { + nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); + return 0; + } + + /* Step 1: Disable RX and TX rings from the Linux kernel perspective + */ + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); + netif_carrier_off(netdev); + nn->link_up = false; + + for (r = 0; r < nn->num_r_vecs; r++) + napi_disable(&nn->r_vecs[r].napi); + + netif_tx_disable(netdev); + + /* Step 2: Tell NFP + */ + nfp_net_clear_config_and_disable(nn); + + /* Step 3: Free resources + */ + for (r = 0; r < nn->num_r_vecs; r++) { + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); + } + + nfp_net_free_rings(nn); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + + nn_dbg(nn, "%s down", netdev->name); + return 0; +} + +static void nfp_net_set_rx_mode(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + + new_ctrl = nn->ctrl; + + if (netdev->flags & IFF_PROMISC) { + if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) + new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; + else + nn_warn(nn, "FW does not support promiscuous mode\n"); + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; + } + + if (new_ctrl == nn->ctrl) + return; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + if (nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN)) + return; + + nn->ctrl = new_ctrl; +} + +static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 tmp; + + nn_dbg(nn, "New MTU = %d\n", new_mtu); + + if (new_mtu < 68 || new_mtu > nn->max_mtu) { + nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); + return -EINVAL; + } + + netdev->mtu = new_mtu; + + /* Freelist buffer size rounded up to the nearest 1K */ + tmp = new_mtu + ETH_HLEN + VLAN_HLEN + NFP_NET_MAX_PREPEND; + nn->fl_bufsz = roundup(tmp, 1024); + + /* restart if running */ + if (netif_running(netdev)) { + nfp_net_netdev_close(netdev); + nfp_net_netdev_open(netdev); + } + + return 0; +} + +static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; + u64 data[3]; + unsigned int start; + + do { + start = u64_stats_fetch_begin(&r_vec->rx_sync); + data[0] = r_vec->rx_pkts; + data[1] = r_vec->rx_bytes; + } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); + stats->rx_packets += data[0]; + stats->rx_bytes += data[1]; + + do { + start = u64_stats_fetch_begin(&r_vec->tx_sync); + data[0] = r_vec->tx_pkts; + data[1] = r_vec->tx_bytes; + data[2] = r_vec->tx_errors; + } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); + stats->tx_packets += data[0]; + stats->tx_bytes += data[1]; + stats->tx_errors += data[2]; + } + + return stats; +} + +static int nfp_net_set_features(struct net_device *netdev, + netdev_features_t features) +{ + netdev_features_t changed = netdev->features ^ features; + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + int err; + + /* Assume this is not called with features we have not advertised */ + + new_ctrl = nn->ctrl; + + if (changed & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; + } + + if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { + if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) + new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; + } + + if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { + if (features & (NETIF_F_TSO | NETIF_F_TSO6)) + new_ctrl |= NFP_NET_CFG_CTRL_LSO; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_TX) { + if (features & NETIF_F_HW_VLAN_CTAG_TX) + new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; + } + + if (changed & NETIF_F_SG) { + if (features & NETIF_F_SG) + new_ctrl |= NFP_NET_CFG_CTRL_GATHER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; + } + + nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", + netdev->features, features, changed); + + if (new_ctrl == nn->ctrl) + return 0; + + nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + nn->ctrl = new_ctrl; + + return 0; +} + +static netdev_features_t +nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + u8 l4_hdr; + + /* We can't do TSO over double tagged packets (802.1AD) */ + features &= vlan_features_check(skb, features); + + if (!skb->encapsulation) + return features; + + /* Ensure that inner L4 header offset fits into TX descriptor field */ + if (skb_is_gso(skb)) { + u32 hdrlen; + + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) + features &= ~NETIF_F_GSO_MASK; + } + + /* VXLAN/GRE check */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + } + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || + (l4_hdr == IPPROTO_UDP && + (skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + + return features; +} + +/** + * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW + * @nn: NFP Net device to reconfigure + * @idx: Index into the port table where new port should be written + * @port: UDP port to configure (pass zero to remove VXLAN port) + */ +static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) +{ + int i; + + nn->vxlan_ports[idx] = port; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) + return; + + BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) + nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), + be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | + be16_to_cpu(nn->vxlan_ports[i])); + + nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); +} + +/** + * nfp_net_find_vxlan_idx() - find table entry of the port or a free one + * @nn: NFP Network structure + * @port: UDP port to look for + * + * Return: if the port is already in the table -- it's position; + * if the port is not in the table -- free position to use; + * if the table is full -- -ENOSPC. + */ +static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) +{ + int i, free_idx = -ENOSPC; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { + if (nn->vxlan_ports[i] == port) + return i; + if (!nn->vxlan_usecnt[i]) + free_idx = i; + } + + return free_idx; +} + +static void nfp_net_add_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (idx == -ENOSPC) + return; + + if (!nn->vxlan_usecnt[idx]++) + nfp_net_set_vxlan_port(nn, idx, port); +} + +static void nfp_net_del_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (!nn->vxlan_usecnt[idx] || idx == -ENOSPC) + return; + + if (!--nn->vxlan_usecnt[idx]) + nfp_net_set_vxlan_port(nn, idx, 0); +} + +static const struct net_device_ops nfp_net_netdev_ops = { + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_features = nfp_net_set_features, + .ndo_features_check = nfp_net_features_check, + .ndo_add_vxlan_port = nfp_net_add_vxlan_port, + .ndo_del_vxlan_port = nfp_net_del_vxlan_port, +}; + +/** + * nfp_net_info() - Print general info about the NIC + * @nn: NFP Net device to reconfigure + */ +void nfp_net_info(struct nfp_net *nn) +{ + nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx", + nn->is_vf ? "VF " : "", + nn->num_tx_rings, nn->max_tx_rings, + nn->num_rx_rings, nn->max_rx_rings); + nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor, + nn->max_mtu); + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn->cap, + nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", + nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", + nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", + nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", + nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", + nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : ""); +} + +/** + * nfp_net_netdev_alloc() - Allocate netdev and related structure + * @pdev: PCI device + * @max_tx_rings: Maximum number of TX rings supported by device + * @max_rx_rings: Maximum number of RX rings supported by device + * + * This function allocates a netdev device and fills in the initial + * part of the @struct nfp_net structure. + * + * Return: NFP Net device structure, or ERR_PTR on error. + */ +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings) +{ + struct net_device *netdev; + struct nfp_net *nn; + int nqs; + + netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), + max_tx_rings, max_rx_rings); + if (!netdev) + return ERR_PTR(-ENOMEM); + + SET_NETDEV_DEV(netdev, &pdev->dev); + nn = netdev_priv(netdev); + + nn->netdev = netdev; + nn->pdev = pdev; + + nn->max_tx_rings = max_tx_rings; + nn->max_rx_rings = max_rx_rings; + + nqs = netif_get_num_default_rss_queues(); + nn->num_tx_rings = min_t(int, nqs, max_tx_rings); + nn->num_rx_rings = min_t(int, nqs, max_rx_rings); + + nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; + nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; + + spin_lock_init(&nn->reconfig_lock); + spin_lock_init(&nn->link_status_lock); + + return nn; +} + +/** + * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did + * @nn: NFP Net device to reconfigure + */ +void nfp_net_netdev_free(struct nfp_net *nn) +{ + free_netdev(nn->netdev); +} + +/** + * nfp_net_rss_init() - Set the initial RSS parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_rss_init(struct nfp_net *nn) +{ + int i; + + get_random_bytes(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + + for (i = 0; i < sizeof(nn->rss_itbl); i++) + nn->rss_itbl[i] = + ethtool_rxfh_indir_default(i, nn->num_rx_rings); + + /* Enable IPv4/IPv6 TCP by default */ + nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | + NFP_NET_CFG_RSS_IPV6_TCP | + NFP_NET_CFG_RSS_TOEPLITZ | + NFP_NET_CFG_RSS_MASK; +} + +/** + * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_irqmod_init(struct nfp_net *nn) +{ + /* defaults correspond to no IRQ moderation */ + nn->rx_coalesce_usecs = 0; + nn->rx_coalesce_max_frames = 1; + nn->tx_coalesce_usecs = 0; + nn->tx_coalesce_max_frames = 1; +} + +/** + * nfp_net_netdev_init() - Initialise/finalise the netdev structure + * @netdev: netdev structure + * + * Return: 0 on success or negative errno on error. + */ +int nfp_net_netdev_init(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Get some of the read-only fields from the BAR */ + nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); + nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); + + nfp_net_write_mac_addr(nn, nn->netdev->dev_addr); + + /* Set default MTU and Freelist buffer size */ + if (nn->max_mtu < NFP_NET_DEFAULT_MTU) + netdev->mtu = nn->max_mtu; + else + netdev->mtu = NFP_NET_DEFAULT_MTU; + nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ; + + /* Advertise/enable offloads based on capabilities + * + * Note: netdev->features show the currently enabled features + * and netdev->hw_features advertises which features are + * supported. By default we enable most features. + */ + netdev->hw_features = NETIF_F_HIGHDMA; + if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { + netdev->hw_features |= NETIF_F_RXCSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { + netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; + } + if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { + netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + nn->ctrl |= NFP_NET_CFG_CTRL_LSO; + } + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + netdev->hw_features |= NETIF_F_RXHASH; + nfp_net_rss_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_RSS; + } + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && + nn->cap & NFP_NET_CFG_CTRL_NVGRE) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL; + nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; + + netdev->hw_enc_features = netdev->hw_features; + } + + netdev->vlan_features = netdev->hw_features; + + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; + nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + } + + netdev->features = netdev->hw_features; + + /* Advertise but disable TSO by default. */ + netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); + + /* Allow L2 Broadcast and Multicast through by default, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_L2BC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; + if (nn->cap & NFP_NET_CFG_CTRL_L2MC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; + + /* Allow IRQ moderation, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_irqmod_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + } + + /* On NFP-3200 enable MSI-X auto-masking, if supported and the + * interrupts are not shared. + */ + if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO) + nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO; + + /* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */ + if (nn->fw_ver.major >= 2) + nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); + else + nn->rx_offset = NFP_NET_RX_OFFSET; + + /* Stash the re-configuration queue away. First odd queue in TX Bar */ + nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; + + /* Make sure the FW knows the netdev is supposed to be disabled here */ + nn_writel(nn, NFP_NET_CFG_CTRL, 0); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | + NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + /* Finalise the netdev setup */ + ether_setup(netdev); + netdev->netdev_ops = &nfp_net_netdev_ops; + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + nfp_net_set_ethtool_ops(netdev); + nfp_net_irqs_assign(netdev); + + return register_netdev(netdev); +} + +/** + * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. + * @netdev: netdev structure + */ +void nfp_net_netdev_clean(struct net_device *netdev) +{ + unregister_netdev(netdev); +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h new file mode 100644 index 000000000000..8692003aeed8 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -0,0 +1,323 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ctrl.h + * Netronome network device driver: Control BAR layout + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#ifndef _NFP_NET_CTRL_H_ +#define _NFP_NET_CTRL_H_ + +/* IMPORTANT: This header file is shared with the FW, + * no OS specific constructs, please! + */ + +/** + * Configuration BAR size. + * + * The configuration BAR is 8K in size, but on the NFP6000, due to + * THB-350, 32k needs to be reserved. + */ +#define NFP_NET_CFG_BAR_SZ (32 * 1024) + +/** + * Offset in Freelist buffer where packet starts on RX + */ +#define NFP_NET_RX_OFFSET 32 + +/** + * Maximum header size supported for LSO frames + */ +#define NFP_NET_LSO_MAX_HDR_SZ 255 + +/** + * Hash type pre-pended when a RSS hash was computed + */ +#define NFP_NET_RSS_NONE 0 +#define NFP_NET_RSS_IPV4 1 +#define NFP_NET_RSS_IPV6 2 +#define NFP_NET_RSS_IPV6_EX 3 +#define NFP_NET_RSS_IPV4_TCP 4 +#define NFP_NET_RSS_IPV6_TCP 5 +#define NFP_NET_RSS_IPV6_EX_TCP 6 +#define NFP_NET_RSS_IPV4_UDP 7 +#define NFP_NET_RSS_IPV6_UDP 8 +#define NFP_NET_RSS_IPV6_EX_UDP 9 + +/** + * @NFP_NET_TXR_MAX: Maximum number of TX rings + * @NFP_NET_TXR_MASK: Mask for TX rings + * @NFP_NET_RXR_MAX: Maximum number of RX rings + * @NFP_NET_RXR_MASK: Mask for RX rings + */ +#define NFP_NET_TXR_MAX 64 +#define NFP_NET_TXR_MASK (NFP_NET_TXR_MAX - 1) +#define NFP_NET_RXR_MAX 64 +#define NFP_NET_RXR_MASK (NFP_NET_RXR_MAX - 1) + +/** + * Read/Write config words (0x0000 - 0x002c) + * @NFP_NET_CFG_CTRL: Global control + * @NFP_NET_CFG_UPDATE: Indicate which fields are updated + * @NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings + * @NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings + * @NFP_NET_CFG_MTU: Set MTU size + * @NFP_NET_CFG_FLBUFSZ: Set freelist buffer size (must be larger than MTU) + * @NFP_NET_CFG_EXN: MSI-X table entry for exceptions + * @NFP_NET_CFG_LSC: MSI-X table entry for link state changes + * @NFP_NET_CFG_MACADDR: MAC address + * + * TODO: + * - define Error details in UPDATE + */ +#define NFP_NET_CFG_CTRL 0x0000 +#define NFP_NET_CFG_CTRL_ENABLE (0x1 << 0) /* Global enable */ +#define NFP_NET_CFG_CTRL_PROMISC (0x1 << 1) /* Enable Promisc mode */ +#define NFP_NET_CFG_CTRL_L2BC (0x1 << 2) /* Allow L2 Broadcast */ +#define NFP_NET_CFG_CTRL_L2MC (0x1 << 3) /* Allow L2 Multicast */ +#define NFP_NET_CFG_CTRL_RXCSUM (0x1 << 4) /* Enable RX Checksum */ +#define NFP_NET_CFG_CTRL_TXCSUM (0x1 << 5) /* Enable TX Checksum */ +#define NFP_NET_CFG_CTRL_RXVLAN (0x1 << 6) /* Enable VLAN strip */ +#define NFP_NET_CFG_CTRL_TXVLAN (0x1 << 7) /* Enable VLAN insert */ +#define NFP_NET_CFG_CTRL_SCATTER (0x1 << 8) /* Scatter DMA */ +#define NFP_NET_CFG_CTRL_GATHER (0x1 << 9) /* Gather DMA */ +#define NFP_NET_CFG_CTRL_LSO (0x1 << 10) /* LSO/TSO */ +#define NFP_NET_CFG_CTRL_RINGCFG (0x1 << 16) /* Ring runtime changes */ +#define NFP_NET_CFG_CTRL_RSS (0x1 << 17) /* RSS */ +#define NFP_NET_CFG_CTRL_IRQMOD (0x1 << 18) /* Interrupt moderation */ +#define NFP_NET_CFG_CTRL_RINGPRIO (0x1 << 19) /* Ring priorities */ +#define NFP_NET_CFG_CTRL_MSIXAUTO (0x1 << 20) /* MSI-X auto-masking */ +#define NFP_NET_CFG_CTRL_TXRWB (0x1 << 21) /* Write-back of TX ring*/ +#define NFP_NET_CFG_CTRL_L2SWITCH (0x1 << 22) /* L2 Switch */ +#define NFP_NET_CFG_CTRL_L2SWITCH_LOCAL (0x1 << 23) /* Switch to local */ +#define NFP_NET_CFG_CTRL_VXLAN (0x1 << 24) /* VXLAN tunnel support */ +#define NFP_NET_CFG_CTRL_NVGRE (0x1 << 25) /* NVGRE tunnel support */ +#define NFP_NET_CFG_UPDATE 0x0004 +#define NFP_NET_CFG_UPDATE_GEN (0x1 << 0) /* General update */ +#define NFP_NET_CFG_UPDATE_RING (0x1 << 1) /* Ring config change */ +#define NFP_NET_CFG_UPDATE_RSS (0x1 << 2) /* RSS config change */ +#define NFP_NET_CFG_UPDATE_TXRPRIO (0x1 << 3) /* TX Ring prio change */ +#define NFP_NET_CFG_UPDATE_RXRPRIO (0x1 << 4) /* RX Ring prio change */ +#define NFP_NET_CFG_UPDATE_MSIX (0x1 << 5) /* MSI-X change */ +#define NFP_NET_CFG_UPDATE_L2SWITCH (0x1 << 6) /* Switch changes */ +#define NFP_NET_CFG_UPDATE_RESET (0x1 << 7) /* Update due to FLR */ +#define NFP_NET_CFG_UPDATE_IRQMOD (0x1 << 8) /* IRQ mod change */ +#define NFP_NET_CFG_UPDATE_VXLAN (0x1 << 9) /* VXLAN port change */ +#define NFP_NET_CFG_UPDATE_ERR (0x1 << 31) /* A error occurred */ +#define NFP_NET_CFG_TXRS_ENABLE 0x0008 +#define NFP_NET_CFG_RXRS_ENABLE 0x0010 +#define NFP_NET_CFG_MTU 0x0018 +#define NFP_NET_CFG_FLBUFSZ 0x001c +#define NFP_NET_CFG_EXN 0x001f +#define NFP_NET_CFG_LSC 0x0020 +#define NFP_NET_CFG_MACADDR 0x0024 + +/** + * Read-only words (0x0030 - 0x0050): + * @NFP_NET_CFG_VERSION: Firmware version number + * @NFP_NET_CFG_STS: Status + * @NFP_NET_CFG_CAP: Capabilities (same bits as @NFP_NET_CFG_CTRL) + * @NFP_NET_MAX_TXRINGS: Maximum number of TX rings + * @NFP_NET_MAX_RXRINGS: Maximum number of RX rings + * @NFP_NET_MAX_MTU: Maximum support MTU + * @NFP_NET_CFG_START_TXQ: Start Queue Control Queue to use for TX (PF only) + * @NFP_NET_CFG_START_RXQ: Start Queue Control Queue to use for RX (PF only) + * + * TODO: + * - define more STS bits + */ +#define NFP_NET_CFG_VERSION 0x0030 +#define NFP_NET_CFG_VERSION_RESERVED_MASK (0xff << 24) +#define NFP_NET_CFG_VERSION_CLASS_MASK (0xff << 16) +#define NFP_NET_CFG_VERSION_CLASS(x) (((x) & 0xff) << 16) +#define NFP_NET_CFG_VERSION_CLASS_GENERIC 0 +#define NFP_NET_CFG_VERSION_MAJOR_MASK (0xff << 8) +#define NFP_NET_CFG_VERSION_MAJOR(x) (((x) & 0xff) << 8) +#define NFP_NET_CFG_VERSION_MINOR_MASK (0xff << 0) +#define NFP_NET_CFG_VERSION_MINOR(x) (((x) & 0xff) << 0) +#define NFP_NET_CFG_STS 0x0034 +#define NFP_NET_CFG_STS_LINK (0x1 << 0) /* Link up or down */ +#define NFP_NET_CFG_CAP 0x0038 +#define NFP_NET_CFG_MAX_TXRINGS 0x003c +#define NFP_NET_CFG_MAX_RXRINGS 0x0040 +#define NFP_NET_CFG_MAX_MTU 0x0044 +/* Next two words are being used by VFs for solving THB350 issue */ +#define NFP_NET_CFG_START_TXQ 0x0048 +#define NFP_NET_CFG_START_RXQ 0x004c + +/** + * NFP-3200 workaround (0x0050 - 0x0058) + * @NFP_NET_CFG_SPARE_ADDR: DMA address for ME code to use (e.g. YDS-155 fix) + */ +#define NFP_NET_CFG_SPARE_ADDR 0x0050 +/** + * NFP6000/NFP4000 - Prepend configuration + */ +#define NFP_NET_CFG_RX_OFFSET 0x0050 +#define NFP_NET_CFG_RX_OFFSET_DYNAMIC 0 /* Prepend mode */ + +/** + * NFP6000/NFP4000 - VXLAN/UDP encap configuration + * @NFP_NET_CFG_VXLAN_PORT: Base address of table of tunnels' UDP dst ports + * @NFP_NET_CFG_VXLAN_SZ: Size of the UDP port table in bytes + */ +#define NFP_NET_CFG_VXLAN_PORT 0x0060 +#define NFP_NET_CFG_VXLAN_SZ 0x0008 + +/** + * 64B reserved for future use (0x0080 - 0x00c0) + */ +#define NFP_NET_CFG_RESERVED 0x0080 +#define NFP_NET_CFG_RESERVED_SZ 0x0040 + +/** + * RSS configuration (0x0100 - 0x01ac): + * Used only when NFP_NET_CFG_CTRL_RSS is enabled + * @NFP_NET_CFG_RSS_CFG: RSS configuration word + * @NFP_NET_CFG_RSS_KEY: RSS "secret" key + * @NFP_NET_CFG_RSS_ITBL: RSS indirection table + */ +#define NFP_NET_CFG_RSS_BASE 0x0100 +#define NFP_NET_CFG_RSS_CTRL NFP_NET_CFG_RSS_BASE +#define NFP_NET_CFG_RSS_MASK (0x7f) +#define NFP_NET_CFG_RSS_MASK_of(_x) ((_x) & 0x7f) +#define NFP_NET_CFG_RSS_IPV4 (1 << 8) /* RSS for IPv4 */ +#define NFP_NET_CFG_RSS_IPV6 (1 << 9) /* RSS for IPv6 */ +#define NFP_NET_CFG_RSS_IPV4_TCP (1 << 10) /* RSS for IPv4/TCP */ +#define NFP_NET_CFG_RSS_IPV4_UDP (1 << 11) /* RSS for IPv4/UDP */ +#define NFP_NET_CFG_RSS_IPV6_TCP (1 << 12) /* RSS for IPv6/TCP */ +#define NFP_NET_CFG_RSS_IPV6_UDP (1 << 13) /* RSS for IPv6/UDP */ +#define NFP_NET_CFG_RSS_TOEPLITZ (1 << 24) /* Use Toeplitz hash */ +#define NFP_NET_CFG_RSS_KEY (NFP_NET_CFG_RSS_BASE + 0x4) +#define NFP_NET_CFG_RSS_KEY_SZ 0x28 +#define NFP_NET_CFG_RSS_ITBL (NFP_NET_CFG_RSS_BASE + 0x4 + \ + NFP_NET_CFG_RSS_KEY_SZ) +#define NFP_NET_CFG_RSS_ITBL_SZ 0x80 + +/** + * TX ring configuration (0x200 - 0x800) + * @NFP_NET_CFG_TXR_BASE: Base offset for TX ring configuration + * @NFP_NET_CFG_TXR_ADDR: Per TX ring DMA address (8B entries) + * @NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries) + * @NFP_NET_CFG_TXR_SZ: Per TX ring ring size (1B entries) + * @NFP_NET_CFG_TXR_VEC: Per TX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_TXR_PRIO: Per TX ring priority (1B entries) + * @NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet + */ +#define NFP_NET_CFG_TXR_BASE 0x0200 +#define NFP_NET_CFG_TXR_ADDR(_x) (NFP_NET_CFG_TXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_WB_ADDR(_x) (NFP_NET_CFG_TXR_BASE + 0x200 + \ + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_SZ(_x) (NFP_NET_CFG_TXR_BASE + 0x400 + (_x)) +#define NFP_NET_CFG_TXR_VEC(_x) (NFP_NET_CFG_TXR_BASE + 0x440 + (_x)) +#define NFP_NET_CFG_TXR_PRIO(_x) (NFP_NET_CFG_TXR_BASE + 0x480 + (_x)) +#define NFP_NET_CFG_TXR_IRQ_MOD(_x) (NFP_NET_CFG_TXR_BASE + 0x500 + \ + ((_x) * 0x4)) + +/** + * RX ring configuration (0x0800 - 0x0c00) + * @NFP_NET_CFG_RXR_BASE: Base offset for RX ring configuration + * @NFP_NET_CFG_RXR_ADDR: Per RX ring DMA address (8B entries) + * @NFP_NET_CFG_RXR_SZ: Per RX ring ring size (1B entries) + * @NFP_NET_CFG_RXR_VEC: Per RX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_RXR_PRIO: Per RX ring priority (1B entries) + * @NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries) + */ +#define NFP_NET_CFG_RXR_BASE 0x0800 +#define NFP_NET_CFG_RXR_ADDR(_x) (NFP_NET_CFG_RXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_RXR_SZ(_x) (NFP_NET_CFG_RXR_BASE + 0x200 + (_x)) +#define NFP_NET_CFG_RXR_VEC(_x) (NFP_NET_CFG_RXR_BASE + 0x240 + (_x)) +#define NFP_NET_CFG_RXR_PRIO(_x) (NFP_NET_CFG_RXR_BASE + 0x280 + (_x)) +#define NFP_NET_CFG_RXR_IRQ_MOD(_x) (NFP_NET_CFG_RXR_BASE + 0x300 + \ + ((_x) * 0x4)) + +/** + * Interrupt Control/Cause registers (0x0c00 - 0x0d00) + * These registers are only used when MSI-X auto-masking is not + * enabled (@NFP_NET_CFG_CTRL_MSIXAUTO not set). The array is index + * by MSI-X entry and are 1B in size. If an entry is zero, the + * corresponding entry is enabled. If the FW generates an interrupt, + * it writes a cause into the corresponding field. This also masks + * the MSI-X entry and the host driver must clear the register to + * re-enable the interrupt. + */ +#define NFP_NET_CFG_ICR_BASE 0x0c00 +#define NFP_NET_CFG_ICR(_x) (NFP_NET_CFG_ICR_BASE + (_x)) +#define NFP_NET_CFG_ICR_UNMASKED 0x0 +#define NFP_NET_CFG_ICR_RXTX 0x1 +#define NFP_NET_CFG_ICR_LSC 0x2 + +/** + * General device stats (0x0d00 - 0x0d90) + * all counters are 64bit. + */ +#define NFP_NET_CFG_STATS_BASE 0x0d00 +#define NFP_NET_CFG_STATS_RX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x00) +#define NFP_NET_CFG_STATS_RX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x08) +#define NFP_NET_CFG_STATS_RX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x10) +#define NFP_NET_CFG_STATS_RX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x18) +#define NFP_NET_CFG_STATS_RX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x20) +#define NFP_NET_CFG_STATS_RX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x28) +#define NFP_NET_CFG_STATS_RX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x30) +#define NFP_NET_CFG_STATS_RX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x38) +#define NFP_NET_CFG_STATS_RX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x40) + +#define NFP_NET_CFG_STATS_TX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x48) +#define NFP_NET_CFG_STATS_TX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x50) +#define NFP_NET_CFG_STATS_TX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x58) +#define NFP_NET_CFG_STATS_TX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x60) +#define NFP_NET_CFG_STATS_TX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x68) +#define NFP_NET_CFG_STATS_TX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x70) +#define NFP_NET_CFG_STATS_TX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x78) +#define NFP_NET_CFG_STATS_TX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x80) +#define NFP_NET_CFG_STATS_TX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x88) + +/** + * Per ring stats (0x1000 - 0x1800) + * options, 64bit per entry + * @NFP_NET_CFG_TXR_STATS: TX ring statistics (Packet and Byte count) + * @NFP_NET_CFG_RXR_STATS: RX ring statistics (Packet and Byte count) + */ +#define NFP_NET_CFG_TXR_STATS_BASE 0x1000 +#define NFP_NET_CFG_TXR_STATS(_x) (NFP_NET_CFG_TXR_STATS_BASE + \ + ((_x) * 0x10)) +#define NFP_NET_CFG_RXR_STATS_BASE 0x1400 +#define NFP_NET_CFG_RXR_STATS(_x) (NFP_NET_CFG_RXR_STATS_BASE + \ + ((_x) * 0x10)) + +#endif /* _NFP_NET_CTRL_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c new file mode 100644 index 000000000000..4c97c713121c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -0,0 +1,235 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/rtnetlink.h> + +#include "nfp_net.h" + +static struct dentry *nfp_dir; + +static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_rx_ring *rx_ring = file->private; + int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!rx_ring->r_vec || !rx_ring->r_vec->nfp_net) + goto out; + nn = rx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + rxd_cnt = rx_ring->cnt; + + fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl); + fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl); + rx_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_rx); + rx_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + + seq_printf(file, "RX[%02d]: H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d RX_RD=%d RX_WR=%d\n", + rx_ring->idx, rx_ring->rd_p, rx_ring->wr_p, + fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p); + + for (i = 0; i < rxd_cnt; i++) { + rxd = &rx_ring->rxds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x", i, + rxd->vals[0], rxd->vals[1]); + + skb = READ_ONCE(rx_ring->rxbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + + if (rx_ring->rxbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &rx_ring->rxbufs[i].dma_addr); + + if (i == rx_ring->rd_p % rxd_cnt) + seq_puts(file, " H_RD "); + if (i == rx_ring->wr_p % rxd_cnt) + seq_puts(file, " H_WR "); + if (i == fl_rd_p % rxd_cnt) + seq_puts(file, " FL_RD"); + if (i == fl_wr_p % rxd_cnt) + seq_puts(file, " FL_WR"); + if (i == rx_rd_p % rxd_cnt) + seq_puts(file, " RX_RD"); + if (i == rx_wr_p % rxd_cnt) + seq_puts(file, " RX_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); +} + +static const struct file_operations nfp_rx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_rx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_tx_ring *tx_ring = file->private; + struct nfp_net_tx_desc *txd; + int d_rd_p, d_wr_p, txd_cnt; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!tx_ring->r_vec || !tx_ring->r_vec->nfp_net) + goto out; + nn = tx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + txd_cnt = tx_ring->cnt; + + d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); + + seq_printf(file, "TX[%02d]: H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n", + tx_ring->idx, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); + + for (i = 0; i < txd_cnt; i++) { + txd = &tx_ring->txds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, + txd->vals[0], txd->vals[1], + txd->vals[2], txd->vals[3]); + + skb = READ_ONCE(tx_ring->txbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + if (tx_ring->txbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &tx_ring->txbufs[i].dma_addr); + + if (i == tx_ring->rd_p % txd_cnt) + seq_puts(file, " H_RD"); + if (i == tx_ring->wr_p % txd_cnt) + seq_puts(file, " H_WR"); + if (i == d_rd_p % txd_cnt) + seq_puts(file, " D_RD"); + if (i == d_wr_p % txd_cnt) + seq_puts(file, " D_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); +} + +static const struct file_operations nfp_tx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_tx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ + static struct dentry *queues, *tx, *rx; + char int_name[16]; + int i; + + if (IS_ERR_OR_NULL(nfp_dir)) + return; + + nn->debugfs_dir = debugfs_create_dir(pci_name(nn->pdev), nfp_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + /* Create queue debugging sub-tree */ + queues = debugfs_create_dir("queue", nn->debugfs_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + rx = debugfs_create_dir("rx", queues); + tx = debugfs_create_dir("tx", queues); + if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx)) + return; + + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, rx, + &nn->rx_rings[i], &nfp_rx_q_fops); + } + + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, tx, + &nn->tx_rings[i], &nfp_tx_q_fops); + } +} + +void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ + debugfs_remove_recursive(nn->debugfs_dir); + nn->debugfs_dir = NULL; +} + +void nfp_net_debugfs_create(void) +{ + nfp_dir = debugfs_create_dir("nfp_net", NULL); +} + +void nfp_net_debugfs_destroy(void) +{ + debugfs_remove_recursive(nfp_dir); + nfp_dir = NULL; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c new file mode 100644 index 000000000000..16f34c2cfb11 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -0,0 +1,640 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ethtool.c + * Netronome network device driver: ethtool support + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/ethtool.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/* Support for stats. Returns netdev, driver, and device stats */ +enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; +struct _nfp_net_et_stats { + char name[ETH_GSTRING_LEN]; + int type; + int sz; + int off; +}; + +#define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ + FIELD_SIZEOF(struct net_device_stats, m), \ + offsetof(struct net_device_stats, m) +/* For stats in the control BAR (other than Q stats) */ +#define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ + sizeof(u64), \ + (m) +static const struct _nfp_net_et_stats nfp_net_et_stats[] = { + /* netdev stats */ + {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, + {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, + {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, + {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, + {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, + {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, + {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, + {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, + {"multicast", NN_ET_NETDEV_STAT(multicast)}, + {"collisions", NN_ET_NETDEV_STAT(collisions)}, + {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, + {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, + {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, + {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, + {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, + {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, + {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, + {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, + /* Stats from the device */ + {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, + {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, + {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, + {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, + {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, + {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, + {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, + {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, + {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, + + {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, + {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, + {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, + {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, + {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, + {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, + {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, + {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, + {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, +}; + +#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) +#define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) +#define NN_ET_RVEC_GATHER_STATS 7 +#define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) +#define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ + NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) + +static void nfp_net_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + struct nfp_net *nn = netdev_priv(netdev); + + strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); + strlcpy(drvinfo->version, nfp_net_driver_version, + sizeof(drvinfo->version)); + + snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), + "%d.%d.%d.%d", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor); + strlcpy(drvinfo->bus_info, pci_name(nn->pdev), + sizeof(drvinfo->bus_info)); + + drvinfo->n_stats = NN_ET_STATS_LEN; + drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + + ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; + ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; + ring->rx_pending = nn->rxd_cnt; + ring->tx_pending = nn->txd_cnt; +} + +static int nfp_net_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 rxd_cnt, txd_cnt; + + if (netif_running(netdev)) { + /* Some NIC drivers allow reconfiguration on the fly, + * some down the interface, change and then up it + * again. For now we don't allow changes when the + * device is up. + */ + nn_warn(nn, "Can't change rings while device is up\n"); + return -EBUSY; + } + + /* We don't have separate queues/rings for small/large frames. */ + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + /* Round up to supported values */ + rxd_cnt = roundup_pow_of_two(ring->rx_pending); + rxd_cnt = max_t(u32, rxd_cnt, NFP_NET_MIN_RX_DESCS); + rxd_cnt = min_t(u32, rxd_cnt, NFP_NET_MAX_RX_DESCS); + + txd_cnt = roundup_pow_of_two(ring->tx_pending); + txd_cnt = max_t(u32, txd_cnt, NFP_NET_MIN_TX_DESCS); + txd_cnt = min_t(u32, txd_cnt, NFP_NET_MAX_TX_DESCS); + + if (nn->rxd_cnt != rxd_cnt || nn->txd_cnt != txd_cnt) + nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", + nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); + + nn->rxd_cnt = rxd_cnt; + nn->txd_cnt = txd_cnt; + + return 0; +} + +static void nfp_net_get_strings(struct net_device *netdev, + u32 stringset, u8 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + u8 *p = data; + int i; + + switch (stringset) { + case ETH_SS_STATS: + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_r_vecs; i++) { + sprintf(p, "rvec_%u_rx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_busy", i); + p += ETH_GSTRING_LEN; + } + strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_gather", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_lso", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(p, "txq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "txq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(p, "rxq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rxq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + break; + } +} + +static void nfp_net_get_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct rtnl_link_stats64 *netdev_stats; + struct rtnl_link_stats64 temp; + u64 tmp[NN_ET_RVEC_GATHER_STATS]; + u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; + int i, j, k; + u8 __iomem *io_p; + u8 *p; + + netdev_stats = dev_get_stats(netdev, &temp); + + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + switch (nfp_net_et_stats[i].type) { + case NETDEV_ET_STATS: + p = (char *)netdev_stats + nfp_net_et_stats[i].off; + data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? + *(u64 *)p : *(u32 *)p; + break; + + case NFP_NET_DEV_ET_STATS: + io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; + data[i] = readq(io_p); + break; + } + } + for (j = 0; j < nn->num_r_vecs; j++) { + unsigned int start; + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); + data[i++] = nn->r_vecs[j].rx_pkts; + tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; + tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; + tmp[2] = nn->r_vecs[j].hw_csum_rx_error; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); + data[i++] = nn->r_vecs[j].tx_pkts; + data[i++] = nn->r_vecs[j].tx_busy; + tmp[3] = nn->r_vecs[j].hw_csum_tx; + tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; + tmp[5] = nn->r_vecs[j].tx_gather; + tmp[6] = nn->r_vecs[j].tx_lso; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); + + for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) + gathered_stats[k] += tmp[k]; + } + for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) + data[i++] = gathered_stats[j]; + for (j = 0; j < nn->num_tx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; + data[i++] = readq(io_p); + } + for (j = 0; j < nn->num_rx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; + data[i++] = readq(io_p); + } +} + +static int nfp_net_get_sset_count(struct net_device *netdev, int sset) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (sset) { + case ETH_SS_STATS: + return NN_ET_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +/* RX network flow classification (RSS, filters, etc) + */ +static u32 ethtool_flow_to_nfp_flag(u32 flow_type) +{ + static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = { + [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP, + [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP, + [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP, + [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP, + [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4, + [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6, + }; + + if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp)) + return 0; + + return xlate_ethtool_to_nfp[flow_type]; +} + +static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, + struct ethtool_rxnfc *cmd) +{ + u32 nfp_rss_flag; + + cmd->data = 0; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + if (nn->rss_cfg & nfp_rss_flag) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + + return 0; +} + +static int nfp_net_get_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd, u32 *rule_locs) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_GRXRINGS: + cmd->data = nn->num_rx_rings; + return 0; + case ETHTOOL_GRXFH: + return nfp_net_get_rss_hash_opts(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, + struct ethtool_rxnfc *nfc) +{ + u32 new_rss_cfg = nn->rss_cfg; + u32 nfp_rss_flag; + int err; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + /* RSS only supports IP SA/DA and L4 src/dst ports */ + if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | + RXH_L4_B_0_1 | RXH_L4_B_2_3)) + return -EINVAL; + + /* We need at least the IP SA/DA fields for hashing */ + if (!(nfc->data & RXH_IP_SRC) || + !(nfc->data & RXH_IP_DST)) + return -EINVAL; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~nfp_rss_flag; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= nfp_rss_flag; + break; + default: + return -EINVAL; + } + + new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; + new_rss_cfg |= NFP_NET_CFG_RSS_MASK; + + if (new_rss_cfg == nn->rss_cfg) + return 0; + + writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); + if (err) + return err; + + nn->rss_cfg = new_rss_cfg; + + nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); + return 0; +} + +static int nfp_net_set_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_SRXFH: + return nfp_net_set_rss_hash_opt(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return 0; + + return ARRAY_SIZE(nn->rss_itbl); +} + +static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev) +{ + return NFP_NET_CFG_RSS_KEY_SZ; +} + +static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, + u8 *hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + if (indir) + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + indir[i] = nn->rss_itbl[i]; + if (key) + memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + if (hfunc) + *hfunc = ETH_RSS_HASH_TOP; + + return 0; +} + +static int nfp_net_set_rxfh(struct net_device *netdev, + const u32 *indir, const u8 *key, + const u8 hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || + !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP)) + return -EOPNOTSUPP; + + if (!key && !indir) + return 0; + + if (key) { + memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ); + nfp_net_rss_write_key(nn); + } + if (indir) { + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + nn->rss_itbl[i] = indir[i]; + + nfp_net_rss_write_itbl(nn); + } + + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); +} + +/* Dump BAR registers + */ +static int nfp_net_get_regs_len(struct net_device *netdev) +{ + return NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_regs(struct net_device *netdev, + struct ethtool_regs *regs, void *p) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 *regs_buf = p; + int i; + + regs->version = nn_readl(nn, NFP_NET_CFG_VERSION); + + for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) + regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); +} + +static int nfp_net_get_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; + ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; + ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; + ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; + + return 0; +} + +static int nfp_net_set_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int factor; + + if (ec->rx_coalesce_usecs_irq || + ec->rx_max_coalesced_frames_irq || + ec->tx_coalesce_usecs_irq || + ec->tx_max_coalesced_frames_irq || + ec->stats_block_coalesce_usecs || + ec->use_adaptive_rx_coalesce || + ec->use_adaptive_tx_coalesce || + ec->pkt_rate_low || + ec->rx_coalesce_usecs_low || + ec->rx_max_coalesced_frames_low || + ec->tx_coalesce_usecs_low || + ec->tx_max_coalesced_frames_low || + ec->pkt_rate_high || + ec->rx_coalesce_usecs_high || + ec->rx_max_coalesced_frames_high || + ec->tx_coalesce_usecs_high || + ec->tx_max_coalesced_frames_high || + ec->rate_sample_interval) + return -ENOTSUPP; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* Each pair of (usecs, max_frames) fields specifies that interrupts + * should be coalesced until + * (usecs > 0 && time_since_first_completion >= usecs) || + * (max_frames > 0 && completed_frames >= max_frames) + * + * It is illegal to set both usecs and max_frames to zero as this would + * cause interrupts to never be generated. To disable coalescing, set + * usecs = 0 and max_frames = 1. + * + * Some implementations ignore the value of max_frames and use the + * condition time_since_first_completion >= usecs + */ + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + /* ensure valid configuration */ + if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) + return -EINVAL; + + if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) + return -EINVAL; + + if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + /* configuration is valid */ + nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; + nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; + nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; + nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; + + /* write configuration to device */ + nfp_net_coalesce_write_cfg(nn); + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); +} + +static const struct ethtool_ops nfp_net_ethtool_ops = { + .get_drvinfo = nfp_net_get_drvinfo, + .get_ringparam = nfp_net_get_ringparam, + .set_ringparam = nfp_net_set_ringparam, + .get_strings = nfp_net_get_strings, + .get_ethtool_stats = nfp_net_get_stats, + .get_sset_count = nfp_net_get_sset_count, + .get_rxnfc = nfp_net_get_rxnfc, + .set_rxnfc = nfp_net_set_rxnfc, + .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, + .get_rxfh_key_size = nfp_net_get_rxfh_key_size, + .get_rxfh = nfp_net_get_rxfh, + .set_rxfh = nfp_net_set_rxfh, + .get_regs_len = nfp_net_get_regs_len, + .get_regs = nfp_net_get_regs, + .get_coalesce = nfp_net_get_coalesce, + .set_coalesce = nfp_net_set_coalesce, +}; + +void nfp_net_set_ethtool_ops(struct net_device *netdev) +{ + netdev->ethtool_ops = &nfp_net_ethtool_ops; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c new file mode 100644 index 000000000000..e2b22b8a20f1 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c @@ -0,0 +1,385 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_netvf_main.c + * Netronome virtual function network device driver: Main entry point + * Author: Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/etherdevice.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +const char nfp_net_driver_name[] = "nfp_netvf"; +const char nfp_net_driver_version[] = "0.1"; +#define PCI_DEVICE_NFP6000VF 0x6003 +static const struct pci_device_id nfp_netvf_pci_device_ids[] = { + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { 0, } /* Required last entry. */ +}; +MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids); + +static void nfp_netvf_get_mac_addr(struct nfp_net *nn) +{ + u8 mac_addr[ETH_ALEN]; + + put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]); + /* We can't do readw for NFP-3200 compatibility */ + put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16, + &mac_addr[4]); + + if (!is_valid_ether_addr(mac_addr)) { + eth_hw_addr_random(nn->netdev); + return; + } + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); +} + +static int nfp_netvf_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + struct nfp_net_fw_version fw_ver; + int max_tx_rings, max_rx_rings; + u32 tx_bar_off, rx_bar_off; + u32 tx_bar_sz, rx_bar_sz; + int tx_bar_no, rx_bar_no; + u8 __iomem *ctrl_bar; + struct nfp_net *nn; + int is_nfp3200; + u32 startq; + int stride; + int err; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + err = pci_request_regions(pdev, nfp_net_driver_name); + if (err) { + dev_err(&pdev->dev, "Unable to allocate device memory.\n"); + goto err_pci_disable; + } + + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + is_nfp3200 = 0; + break; + default: + err = -ENODEV; + goto err_pci_regions; + } + + pci_set_master(pdev); + + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS)); + if (err) + goto err_pci_regions; + + /* Map the Control BAR. + * + * Irrespective of the advertised BAR size we only map the + * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code + * the identical for PF and VF drivers. + */ + ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CRTL_BAR), + NFP_NET_CFG_BAR_SZ); + if (!ctrl_bar) { + dev_err(&pdev->dev, + "Failed to map resource %d\n", NFP_NET_CRTL_BAR); + err = -EIO; + goto err_pci_regions; + } + + nfp_net_get_fw_version(&fw_ver, ctrl_bar); + if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) { + dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + + /* Determine stride */ + if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n"); + } else { + switch (fw_ver.major) { + case 1 ... 3: + if (is_nfp3200) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + } else { + stride = 4; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = tx_bar_no; + } + break; + default: + dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, + fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + } + + /* Find out how many rings are supported */ + max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS); + max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS); + + tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride; + rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride; + + /* Sanity checks */ + if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) { + dev_err(&pdev->dev, + "TX BAR too small for number of TX rings. Adjusting\n"); + tx_bar_sz = pci_resource_len(pdev, tx_bar_no); + max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) { + dev_err(&pdev->dev, + "RX BAR too small for number of RX rings. Adjusting\n"); + rx_bar_sz = pci_resource_len(pdev, rx_bar_no); + max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + + /* XXX Implement a workaround for THB-350 here. Ideally, we + * have a different PCI ID for A rev VFs. + */ + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tx_bar_off = NFP_PCIE_QUEUE(startq); + startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + rx_bar_off = NFP_PCIE_QUEUE(startq); + break; + default: + err = -ENODEV; + goto err_ctrl_unmap; + } + + /* Allocate and initialise the netdev */ + nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings); + if (IS_ERR(nn)) { + err = PTR_ERR(nn); + goto err_ctrl_unmap; + } + + nn->fw_ver = fw_ver; + nn->ctrl_bar = ctrl_bar; + nn->is_vf = 1; + nn->is_nfp3200 = is_nfp3200; + nn->stride_tx = stride; + nn->stride_rx = stride; + + if (rx_bar_no == tx_bar_no) { + u32 bar_off, bar_sz; + resource_size_t map_addr; + + /* Make a single overlapping BAR mapping */ + if (tx_bar_off < rx_bar_off) + bar_off = tx_bar_off; + else + bar_off = rx_bar_off; + + if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz)) + bar_sz = (tx_bar_off + tx_bar_sz) - bar_off; + else + bar_sz = (rx_bar_off + rx_bar_sz) - bar_off; + + map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off; + nn->q_bar = ioremap_nocache(map_addr, bar_sz); + if (!nn->q_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* TX queues */ + nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off); + /* RX queues */ + nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off); + } else { + resource_size_t map_addr; + + /* TX queues */ + map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off; + nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz); + if (!nn->tx_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* RX queues */ + map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off; + nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz); + if (!nn->rx_bar) { + nn_err(nn, "Failed to map resource %d\n", rx_bar_no); + err = -EIO; + goto err_unmap_tx; + } + } + + nfp_netvf_get_mac_addr(nn); + + err = nfp_net_irqs_alloc(nn); + if (!err) { + nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n"); + err = -EIO; + goto err_unmap_rx; + } + + /* Get ME clock frequency from ctrl BAR + * XXX for now frequency is hardcoded until we figure out how + * to get the value from nfp-hwinfo into ctrl bar + */ + nn->me_freq_mhz = 1200; + + err = nfp_net_netdev_init(nn->netdev); + if (err) + goto err_irqs_disable; + + pci_set_drvdata(pdev, nn); + + nfp_net_info(nn); + nfp_net_debugfs_adapter_add(nn); + + return 0; + +err_irqs_disable: + nfp_net_irqs_disable(nn); +err_unmap_rx: + if (!nn->q_bar) + iounmap(nn->rx_bar); +err_unmap_tx: + if (!nn->q_bar) + iounmap(nn->tx_bar); + else + iounmap(nn->q_bar); +err_netdev_free: + pci_set_drvdata(pdev, NULL); + nfp_net_netdev_free(nn); +err_ctrl_unmap: + iounmap(ctrl_bar); +err_pci_regions: + pci_release_regions(pdev); +err_pci_disable: + pci_disable_device(pdev); + return err; +} + +static void nfp_netvf_pci_remove(struct pci_dev *pdev) +{ + struct nfp_net *nn = pci_get_drvdata(pdev); + + /* Note, the order is slightly different from above as we need + * to keep the nn pointer around till we have freed everything. + */ + nfp_net_debugfs_adapter_del(nn); + + nfp_net_netdev_clean(nn->netdev); + + nfp_net_irqs_disable(nn); + + if (!nn->q_bar) { + iounmap(nn->rx_bar); + iounmap(nn->tx_bar); + } else { + iounmap(nn->q_bar); + } + iounmap(nn->ctrl_bar); + + pci_set_drvdata(pdev, NULL); + + nfp_net_netdev_free(nn); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver nfp_netvf_pci_driver = { + .name = nfp_net_driver_name, + .id_table = nfp_netvf_pci_device_ids, + .probe = nfp_netvf_pci_probe, + .remove = nfp_netvf_pci_remove, +}; + +static int __init nfp_netvf_init(void) +{ + int err; + + pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n", + nfp_net_driver_name); + + nfp_net_debugfs_create(); + err = pci_register_driver(&nfp_netvf_pci_driver); + if (err) { + nfp_net_debugfs_destroy(); + return err; + } + + return 0; +} + +static void __exit nfp_netvf_exit(void) +{ + pci_unregister_driver(&nfp_netvf_pci_driver); + nfp_net_debugfs_destroy(); +} + +module_init(nfp_netvf_init); +module_exit(nfp_netvf_exit); + +MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NFP VF network device driver"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* Re: [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-11-23 11:04 ` [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski @ 2015-11-24 19:25 ` David Miller 2015-11-24 19:53 ` Jakub Kicinski 0 siblings, 1 reply; 17+ messages in thread From: David Miller @ 2015-11-24 19:25 UTC (permalink / raw) To: jakub.kicinski; +Cc: netdev, simon.horman, rolf.neugebauer From: Jakub Kicinski <jakub.kicinski@netronome.com> Date: Mon, 23 Nov 2015 11:04:57 +0000 > +#ifdef CONFIG_NFP_NET_DEBUG > +#define DEBUG > +#endif Do not design ad-hoc debug logging facilities locally in your driver, and instead use the existing tree wide facilities as they were designed to be used so that any user can get debugging logs simply by turning it on at run time rather than having the change magic config options in their kernel. ^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-11-24 19:25 ` David Miller @ 2015-11-24 19:53 ` Jakub Kicinski 0 siblings, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-11-24 19:53 UTC (permalink / raw) To: David Miller; +Cc: netdev, simon.horman, rolf.neugebauer On Tue, 24 Nov 2015 14:25:31 -0500 (EST), David Miller wrote: > From: Jakub Kicinski <jakub.kicinski@netronome.com> > Date: Mon, 23 Nov 2015 11:04:57 +0000 > > > +#ifdef CONFIG_NFP_NET_DEBUG > > +#define DEBUG > > +#endif > > Do not design ad-hoc debug logging facilities locally in your driver, > and instead use the existing tree wide facilities as they were designed > to be used so that any user can get debugging logs simply by turning it > on at run time rather than having the change magic config options in > their kernel. True. I picked this habit up from the rt2x00 driver long time ago. Now I see nobody else is doing such things... ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver 2015-10-27 18:15 [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski @ 2015-11-25 15:39 ` Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 3 siblings, 2 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-11-25 15:39 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski This patchset adds support for VFs of Netronome's NFP-4000 and NFP-6000 based NICs. We are currently also preparing the submission for the PF driver, but it is not quite ready yet. The PF driver can be found on GitHub: https://github.com/Netronome/nfp-drv-kmods Jakub Kicinski (2): pci_ids: add Netronome Systems vendor net: add driver for Netronome NFP4000/NFP6000 NIC VFs MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 36 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 761 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2449 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 +++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 +++ include/linux/pci_ids.h | 2 + 13 files changed, 4853 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c -- 1.9.1 ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v4 1/2] pci_ids: add Netronome Systems vendor 2015-11-25 15:39 ` [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski @ 2015-11-25 15:39 ` Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 1 sibling, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-11-25 15:39 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add PCI vendor id for Netronome Systems. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- include/linux/pci_ids.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index d9ba49cedc5d..1acbefc4bbda 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2495,6 +2495,8 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF2 0x1700 #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff +#define PCI_VENDOR_ID_NETRONOME 0x19ee + #define PCI_VENDOR_ID_QMI 0x1a32 #define PCI_VENDOR_ID_AZWAVE 0x1a3b -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-11-25 15:39 ` [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski @ 2015-11-25 15:39 ` Jakub Kicinski 2015-11-30 15:42 ` David Miller 1 sibling, 1 reply; 17+ messages in thread From: Jakub Kicinski @ 2015-11-25 15:39 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add driver for Virtual Functions for the Netronome's NFP-4000 and NFP-6000 based NICs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- v4: - improve the printing macroes (DaveM) - convert RX poll from harvest+refill to alloc+reuse skb on alloc fail - improve IRQ moderation/coalescing - use netdev_rss_key_fill() MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 36 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 761 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2449 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 +++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 +++ 12 files changed, 4851 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c diff --git a/MAINTAINERS b/MAINTAINERS index ea1751283b49..1c7bfab4a926 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7364,6 +7364,13 @@ F: include/net/netrom.h F: include/uapi/linux/netrom.h F: net/netrom/ +NETRONOME ETHERNET DRIVERS +M: Jakub Kicinski <jakub.kicinski@netronome.com> +M: Rolf Neugebauer <rolf.neugebauer@netronome.com> +L: oss-drivers@netronome.com +S: Maintained +F: drivers/net/ethernet/netronome/ + NETWORK BLOCK DEVICE (NBD) M: Markus Pargmann <mpa@pengutronix.de> S: Maintained diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 955d06b9cdba..e57304397d33 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -121,6 +121,7 @@ config FEALNX cards. <http://www.myson.com.tw/> source "drivers/net/ethernet/natsemi/Kconfig" +source "drivers/net/ethernet/netronome/Kconfig" source "drivers/net/ethernet/8390/Kconfig" config NET_NETX diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 4a2ee98738f0..99ede51adf10 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_NET_VENDOR_MOXART) += moxa/ obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/ obj-$(CONFIG_FEALNX) += fealnx.o obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/ +obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/ obj-$(CONFIG_NET_NETX) += netx-eth.o obj-$(CONFIG_NET_VENDOR_NUVOTON) += nuvoton/ obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/ diff --git a/drivers/net/ethernet/netronome/Kconfig b/drivers/net/ethernet/netronome/Kconfig new file mode 100644 index 000000000000..9508ad782c30 --- /dev/null +++ b/drivers/net/ethernet/netronome/Kconfig @@ -0,0 +1,36 @@ +# +# Netronome device configuration +# + +config NET_VENDOR_NETRONOME + bool "Netronome(R) devices" + default y + ---help--- + If you have a Netronome(R) network (Ethernet) card or device, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Netronome(R) cards. If you say Y, you will be + asked for your specific card in the following questions. + +if NET_VENDOR_NETRONOME + +config NFP_NETVF + tristate "Netronome(R) NFP4000/NFP6000 VF NIC driver" + depends on PCI && PCI_MSI + depends on VXLAN || VXLAN=n + ---help--- + This driver supports SR-IOV virtual functions of + the Netronome(R) NFP4000/NFP6000 cards working as + a advanced Ethernet NIC. + +config NFP_NET_DEBUG + bool "Debug support for Netronome(R) NFP3200/NFP6000 NIC drivers" + depends on NFP_NET || NFP_NETVF + ---help--- + Enable extra sanity checks and debugfs support in + Netronome(R) NFP3200/NFP6000 NIC PF and VF drivers. + Note: selecting this option may adversely impact + performance. + +endif diff --git a/drivers/net/ethernet/netronome/Makefile b/drivers/net/ethernet/netronome/Makefile new file mode 100644 index 000000000000..dcb7b383f634 --- /dev/null +++ b/drivers/net/ethernet/netronome/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Netronome network device drivers +# + +obj-$(CONFIG_NFP_NETVF) += nfp/ diff --git a/drivers/net/ethernet/netronome/nfp/Makefile b/drivers/net/ethernet/netronome/nfp/Makefile new file mode 100644 index 000000000000..68178819ff12 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/Makefile @@ -0,0 +1,8 @@ +obj-$(CONFIG_NFP_NETVF) += nfp_netvf.o + +nfp_netvf-objs := \ + nfp_net_common.o \ + nfp_net_ethtool.o \ + nfp_netvf_main.o + +nfp_netvf-$(CONFIG_NFP_NET_DEBUG) += nfp_net_debugfs.o diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h new file mode 100644 index 000000000000..91fc3c0de769 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -0,0 +1,761 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net.h + * Declarations for Netronome network device driver. + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#ifndef _NFP_NET_H_ +#define _NFP_NET_H_ + +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <asm-generic/io-64-nonatomic-hi-lo.h> + +#include "nfp_net_ctrl.h" + +#define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args) +#define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args) +#define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_dbg(nn, fmt, args...) netdev_dbg((nn)->netdev, fmt, ## args) +#define nn_warn_ratelimit(nn, fmt, args...) \ + do { \ + if (unlikely(net_ratelimit())) \ + netdev_warn((nn)->netdev, fmt, ## args); \ + } while (0) + +#ifdef CONFIG_NFP_NET_DEBUG +#define nn_assert(cond, fmt, args...) \ + do { \ + if (unlikely(!(cond))) { \ + pr_err("assertion %s failed\n", #cond); \ + pr_err(fmt, ## args); \ + BUG(); \ + } \ + } while (0) +#else +#define nn_assert(cond, fmt, args...) do { } while (0) +#endif + +/* Max time to wait for NFP to respond on updates (in ms) */ +#define NFP_NET_POLL_TIMEOUT 5000 + +/* Bar allocation */ +#define NFP_NET_CRTL_BAR 0 +#define NFP_NET_Q0_BAR 2 +#define NFP_NET_Q1_BAR 4 /* OBSOLETE */ + +/* Max bits in DMA address */ +#define NFP_NET_MAX_DMA_BITS 40 + +/* Default size for MTU and freelist buffer sizes */ +#define NFP_NET_DEFAULT_MTU 1500 +#define NFP_NET_DEFAULT_RX_BUFSZ 2048 + +/* Maximum number of bytes prepended to a packet */ +#define NFP_NET_MAX_PREPEND 64 + +/* Interrupt definitions */ +#define NFP_NET_NON_Q_VECTORS 2 +#define NFP_NET_IRQ_LSC_IDX 0 +#define NFP_NET_IRQ_EXN_IDX 1 + +/* Queue/Ring definitions */ +#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ +#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ + +#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ +#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ +#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ +#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ + +#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ +#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ + +#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ + +/* Offload definitions */ +#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) + +/* Forward declarations */ +struct nfp_net; +struct nfp_net_r_vector; + +/* Convenience macro for writing dma address into RX/TX descriptors */ +#define nfp_desc_set_dma_addr(desc, dma_addr) \ + do { \ + __typeof(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ + __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ + } while (0) + +/* TX descriptor format */ + +#define PCIE_DESC_TX_EOP BIT(7) +#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) +#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) + +/* Flags in the host TX descriptor */ +#define PCIE_DESC_TX_CSUM BIT(7) +#define PCIE_DESC_TX_IP4_CSUM BIT(6) +#define PCIE_DESC_TX_TCP_CSUM BIT(5) +#define PCIE_DESC_TX_UDP_CSUM BIT(4) +#define PCIE_DESC_TX_VLAN BIT(3) +#define PCIE_DESC_TX_LSO BIT(2) +#define PCIE_DESC_TX_ENCAP BIT(1) +#define PCIE_DESC_TX_O_IP4_CSUM BIT(0) + +struct nfp_net_tx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of host buf address */ + __le16 dma_len; /* Length to DMA for this desc */ + u8 offset_eop; /* Offset in buf where pkt starts + + * highest bit is eop flag. + */ + __le32 dma_addr_lo; /* Low 32bit of host buf addr */ + + __le16 mss; /* MSS to be used for LSO */ + u8 l4_offset; /* LSO, where the L4 data starts */ + u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ + + __le16 vlan; /* VLAN tag to add if indicated */ + __le16 data_len; /* Length of frame + meta data */ + } __packed; + __le32 vals[4]; + }; +}; + +/** + * struct nfp_net_tx_buf - software TX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) + * @pkt_cnt: Number of packets to be produced out of the skb associated + * with this buffer (valid only on the head's buffer). + * Will be 1 for all non-TSO packets. + * @real_len: Number of bytes which to be produced out of the skb (valid only + * on the head's buffer). Equal to skb->len for non-TSO packets. + */ +struct nfp_net_tx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; + short int fidx; + u16 pkt_cnt; + u32 real_len; +}; + +/** + * struct nfp_net_tx_ring - TX ring structure + * @r_vec: Back pointer to ring vector structure + * @idx: Ring index from Linux's perspective + * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue + * @qcp_q: Pointer to base of the QCP TX queue + * @cnt: Size of the queue in number of descriptors + * @wr_p: TX ring write pointer (free running) + * @rd_p: TX ring read pointer (free running) + * @qcp_rd_p: Local copy of QCP TX queue read pointer + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for .xmit_more delayed kick) + * @txbufs: Array of transmitted TX buffers, to free on transmit + * @txds: Virtual address of TX ring in host memory + * @dma: DMA address of the TX ring + * @size: Size, in bytes, of the TX ring (needed to free) + */ +struct nfp_net_tx_ring { + struct nfp_net_r_vector *r_vec; + + u32 idx; + int qcidx; + u8 __iomem *qcp_q; + + u32 cnt; + u32 wr_p; + u32 rd_p; + u32 qcp_rd_p; + + u32 wr_ptr_add; + + struct nfp_net_tx_buf *txbufs; + struct nfp_net_tx_desc *txds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/* RX and freelist descriptor format */ + +#define PCIE_DESC_RX_DD BIT(7) +#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) + +/* Flags in the RX descriptor */ +#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) +#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) +#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) +#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) +#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) +#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) +#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) +#define PCIE_DESC_RX_SPARE cpu_to_le16(BIT(8)) +#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) +#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) +#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) +#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) +#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) +#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) +#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) +#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) + +#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ + PCIE_DESC_RX_TCP_CSUM | \ + PCIE_DESC_RX_UDP_CSUM | \ + PCIE_DESC_RX_I_IP4_CSUM | \ + PCIE_DESC_RX_I_TCP_CSUM | \ + PCIE_DESC_RX_I_UDP_CSUM) +#define PCIE_DESC_RX_CSUM_OK_SHIFT 1 +#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) +#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ + PCIE_DESC_RX_CSUM_OK_SHIFT) + +struct nfp_net_rx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of the buf address */ + __le16 reserved; /* Must be zero */ + u8 meta_len_dd; /* Must be zero */ + + __le32 dma_addr_lo; /* Low bits of the buffer address */ + } __packed fld; + + struct { + __le16 data_len; /* Length of the frame + meta data */ + u8 reserved; + u8 meta_len_dd; /* Length of meta data prepended + + * descriptor done flag. + */ + + __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ + __le16 vlan; /* VLAN if stripped */ + } __packed rxd; + + __le32 vals[2]; + }; +}; + +struct nfp_net_rx_hash { + __be32 hash_type; + __be32 hash; +}; + +/** + * struct nfp_net_rx_buf - software RX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + */ +struct nfp_net_rx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; +}; + +/** + * struct nfp_net_rx_ring - RX ring structure + * @r_vec: Back pointer to ring vector structure + * @cnt: Size of the queue in number of descriptors + * @wr_p: FL/RX ring write pointer (free running) + * @rd_p: FL/RX ring read pointer (free running) + * @idx: Ring index from Linux's perspective + * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist + * @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue + * @qcp_fl: Pointer to base of the QCP freelist queue + * @qcp_rx: Pointer to base of the QCP RX queue + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for free list batching) + * @rxbufs: Array of transmitted FL/RX buffers + * @rxds: Virtual address of FL/RX ring in host memory + * @dma: DMA address of the FL/RX ring + * @size: Size, in bytes, of the FL/RX ring (needed to free) + */ +struct nfp_net_rx_ring { + struct nfp_net_r_vector *r_vec; + + u32 cnt; + u32 wr_p; + u32 rd_p; + + u16 idx; + u16 wr_ptr_add; + + int fl_qcidx; + int rx_qcidx; + u8 __iomem *qcp_fl; + u8 __iomem *qcp_rx; + + struct nfp_net_rx_buf *rxbufs; + struct nfp_net_rx_desc *rxds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/** + * struct nfp_net_r_vector - Per ring interrupt vector configuration + * @nfp_net: Backpointer to nfp_net structure + * @napi: NAPI structure for this ring vec + * @tx_ring: Pointer to TX ring + * @rx_ring: Pointer to RX ring + * @irq_idx: Index into MSI-X table + * @rx_sync: Seqlock for atomic updates of RX stats + * @rx_pkts: Number of received packets + * @rx_bytes: Number of received bytes + * @rx_drops: Number of packets dropped on RX due to lack of resources + * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK + * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK + * @hw_csum_rx_error: Counter of packets with bad checksums + * @tx_sync: Seqlock for atomic updates of TX stats + * @tx_pkts: Number of Transmitted packets + * @tx_bytes: Number of Transmitted bytes + * @hw_csum_tx: Counter of packets with TX checksum offload requested + * @hw_csum_tx_inner: Counter of inner TX checksum offload requests + * @tx_gather: Counter of packets with Gather DMA + * @tx_lso: Counter of LSO packets sent + * @tx_errors: How many TX errors were encountered + * @tx_busy: How often was TX busy (no space)? + * @handler: Interrupt handler for this ring vector + * @name: Name of the interrupt vector + * @affinity_mask: SMP affinity mask for this vector + * + * This structure ties RX and TX rings to interrupt vectors and a NAPI + * context. This currently only supports one RX and TX ring per + * interrupt vector but might be extended in the future to allow + * association of multiple rings per vector. + */ +struct nfp_net_r_vector { + struct nfp_net *nfp_net; + struct napi_struct napi; + + struct nfp_net_tx_ring *tx_ring; + struct nfp_net_rx_ring *rx_ring; + + int irq_idx; + + struct u64_stats_sync rx_sync; + u64 rx_pkts; + u64 rx_bytes; + u64 rx_drops; + u64 hw_csum_rx_ok; + u64 hw_csum_rx_inner_ok; + u64 hw_csum_rx_error; + + struct u64_stats_sync tx_sync; + u64 tx_pkts; + u64 tx_bytes; + u64 hw_csum_tx; + u64 hw_csum_tx_inner; + u64 tx_gather; + u64 tx_lso; + u64 tx_errors; + u64 tx_busy; + + irq_handler_t handler; + char name[IFNAMSIZ + 8]; + cpumask_t affinity_mask; +} ____cacheline_aligned; + +/* Firmware version as it is written in the 32bit value in the BAR */ +struct nfp_net_fw_version { + u8 minor; + u8 major; + u8 class; + u8 resv; +} __packed; + +static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, + u8 resv, u8 class, u8 major, u8 minor) +{ + return fw_ver->resv == resv && + fw_ver->class == class && + fw_ver->major == major && + fw_ver->minor == minor; +} + +/** + * struct nfp_net - NFP network device structure + * @pdev: Backpointer to PCI device + * @netdev: Backpointer to net_device structure + * @nfp_fallback: Is the driver used in fallback mode? + * @is_vf: Is the driver attached to a VF? + * @is_nfp3200: Is the driver for a NFP-3200 card? + * @fw_loaded: Is the firmware loaded? + * @ctrl: Local copy of the control register/word. + * @fl_bufsz: Currently configured size of the freelist buffers + * @rx_offset: Offset in the RX buffers where packet data starts + * @cpp: Pointer to the CPP handle + * @nfp_dev_cpp: Pointer to the NFP Device handle + * @ctrl_area: Pointer to the CPP area for the control BAR + * @tx_area: Pointer to the CPP area for the TX queues + * @rx_area: Pointer to the CPP area for the FL/RX queues + * @fw_ver: Firmware version + * @cap: Capabilities advertised by the Firmware + * @max_mtu: Maximum support MTU advertised by the Firmware + * @rss_cfg: RSS configuration + * @rss_key: RSS secret key + * @rss_itbl: RSS indirection table + * @max_tx_rings: Maximum number of TX rings supported by the Firmware + * @max_rx_rings: Maximum number of RX rings supported by the Firmware + * @num_tx_rings: Currently configured number of TX rings + * @num_rx_rings: Currently configured number of RX rings + * @txd_cnt: Size of the TX ring in number of descriptors + * @rxd_cnt: Size of the RX ring in number of descriptors + * @tx_rings: Array of pre-allocated TX ring structures + * @rx_rings: Array of pre-allocated RX ring structures + * @num_irqs: Number of allocated interrupt vectors + * @num_r_vecs: Number of used ring vectors + * @r_vecs: Pre-allocated array of ring vectors + * @irq_entries: Pre-allocated array of MSI-X entries + * @lsc_handler: Handler for Link State Change interrupt + * @lsc_name: Name for Link State Change interrupt + * @exn_handler: Handler for Exception interrupt + * @exn_name: Name for Exception interrupt + * @shared_handler: Handler for shared interrupts + * @shared_name: Name for shared interrupt + * @me_freq_mhz: ME clock_freq (MHz) + * @reconfig_lock: Protects HW reconfiguration request regs/machinery + * @link_up: Is the link up? + * @link_status_lock: Protects @link_up and ensures atomicity with BAR reading + * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter + * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter + * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter + * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter + * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW + * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts + * @qcp_cfg: Pointer to QCP queue used for configuration notification + * @ctrl_bar: Pointer to mapped control BAR + * @tx_bar: Pointer to mapped TX queues + * @rx_bar: Pointer to mapped FL/RX queues + * @debugfs_dir: Device directory in debugfs + */ +struct nfp_net { + struct pci_dev *pdev; + struct net_device *netdev; + + unsigned nfp_fallback:1; + unsigned is_vf:1; + unsigned is_nfp3200:1; + unsigned fw_loaded:1; + + u32 ctrl; + u32 fl_bufsz; + + u32 rx_offset; + +#ifdef CONFIG_PCI_IOV + unsigned int num_vfs; + struct vf_data_storage *vfinfo; + int vf_rate_link_speed; +#endif + + struct nfp_cpp *cpp; + struct platform_device *nfp_dev_cpp; + struct nfp_cpp_area *ctrl_area; + struct nfp_cpp_area *tx_area; + struct nfp_cpp_area *rx_area; + + struct nfp_net_fw_version fw_ver; + u32 cap; + u32 max_mtu; + + u32 rss_cfg; + u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; + u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; + + int max_tx_rings; + int max_rx_rings; + + int num_tx_rings; + int num_rx_rings; + + int stride_tx; + int stride_rx; + + int txd_cnt; + int rxd_cnt; + + struct nfp_net_tx_ring tx_rings[NFP_NET_MAX_TX_RINGS]; + struct nfp_net_rx_ring rx_rings[NFP_NET_MAX_RX_RINGS]; + + u8 num_irqs; + u8 num_r_vecs; + struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS]; + struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS + + NFP_NET_MAX_TX_RINGS]; + + irq_handler_t lsc_handler; + char lsc_name[IFNAMSIZ + 8]; + + irq_handler_t exn_handler; + char exn_name[IFNAMSIZ + 8]; + + irq_handler_t shared_handler; + char shared_name[IFNAMSIZ + 8]; + + u32 me_freq_mhz; + + bool link_up; + spinlock_t link_status_lock; + + spinlock_t reconfig_lock; + + u32 rx_coalesce_usecs; + u32 rx_coalesce_max_frames; + u32 tx_coalesce_usecs; + u32 tx_coalesce_max_frames; + + __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; + u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; + + u8 __iomem *qcp_cfg; + + u8 __iomem *ctrl_bar; + u8 __iomem *q_bar; + u8 __iomem *tx_bar; + u8 __iomem *rx_bar; + + struct dentry *debugfs_dir; +}; + +/* Functions to read/write from/to a BAR + * Performs any endian conversion necessary. + */ +static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) +{ + writeb(val, nn->ctrl_bar + off); +} + +/* NFP-3200 can't handle 16-bit accesses too well - hence no readw/writew */ + +static inline u32 nn_readl(struct nfp_net *nn, int off) +{ + return readl(nn->ctrl_bar + off); +} + +static inline void nn_writel(struct nfp_net *nn, int off, u32 val) +{ + writel(val, nn->ctrl_bar + off); +} + +static inline u64 nn_readq(struct nfp_net *nn, int off) +{ + return readq(nn->ctrl_bar + off); +} + +static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) +{ + writeq(val, nn->ctrl_bar + off); +} + +/* Flush posted PCI writes by reading something without side effects */ +static inline void nn_pci_flush(struct nfp_net *nn) +{ + nn_readl(nn, NFP_NET_CFG_VERSION); +} + +/* Queue Controller Peripheral access functions and definitions. + * + * Some of the BARs of the NFP are mapped to portions of the Queue + * Controller Peripheral (QCP) address space on the NFP. A QCP queue + * has a read and a write pointer (as well as a size and flags, + * indicating overflow etc). The QCP offers a number of different + * operation on queue pointers, but here we only offer function to + * either add to a pointer or to read the pointer value. + */ +#define NFP_QCP_QUEUE_ADDR_SZ 0x800 +#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) +#define NFP_QCP_QUEUE_ADD_RPTR 0x0000 +#define NFP_QCP_QUEUE_ADD_WPTR 0x0004 +#define NFP_QCP_QUEUE_STS_LO 0x0008 +#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff +#define NFP_QCP_QUEUE_STS_HI 0x000c +#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff + +/* The offset of a QCP queues in the PCIe Target (same on NFP3200 and NFP6000 */ +#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) + +/* nfp_qcp_ptr - Read or Write Pointer of a queue */ +enum nfp_qcp_ptr { + NFP_QCP_READ_PTR = 0, + NFP_QCP_WRITE_PTR +}; + +/* There appear to be an *undocumented* upper limit on the value which + * one can add to a queue and that value is either 0x3f or 0x7f. We + * go with 0x3f as a conservative measure. + */ +#define NFP_QCP_MAX_ADD 0x3f + +static inline void _nfp_qcp_ptr_add(u8 __iomem *q, + enum nfp_qcp_ptr ptr, u32 val) +{ + u32 off; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_ADD_RPTR; + else + off = NFP_QCP_QUEUE_ADD_WPTR; + + while (val > NFP_QCP_MAX_ADD) { + writel(NFP_QCP_MAX_ADD, q + off); + val -= NFP_QCP_MAX_ADD; + } + + writel(val, q + off); +} + +/** + * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); +} + +/** + * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); +} + +static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) +{ + u32 off; + u32 val; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_STS_LO; + else + off = NFP_QCP_QUEUE_STS_HI; + + val = readl(q + off); + + if (ptr == NFP_QCP_READ_PTR) + return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; + else + return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; +} + +/** + * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_READ_PTR); +} + +/** + * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); +} + +/* Globals */ +extern const char nfp_net_driver_name[]; +extern const char nfp_net_driver_version[]; + +/* Prototypes */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar); + +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings); +void nfp_net_netdev_free(struct nfp_net *nn); +int nfp_net_netdev_init(struct net_device *netdev); +void nfp_net_netdev_clean(struct net_device *netdev); +void nfp_net_set_ethtool_ops(struct net_device *netdev); +void nfp_net_info(struct nfp_net *nn); +int nfp_net_reconfig(struct nfp_net *nn, u32 update); +void nfp_net_rss_write_itbl(struct nfp_net *nn); +void nfp_net_rss_write_key(struct nfp_net *nn); +void nfp_net_coalesce_write_cfg(struct nfp_net *nn); +int nfp_net_irqs_alloc(struct nfp_net *nn); +void nfp_net_irqs_disable(struct nfp_net *nn); + +#ifdef CONFIG_NFP_NET_DEBUG +void nfp_net_debugfs_create(void); +void nfp_net_debugfs_destroy(void); +void nfp_net_debugfs_adapter_add(struct nfp_net *nn); +void nfp_net_debugfs_adapter_del(struct nfp_net *nn); +#else +static inline void nfp_net_debugfs_create(void) +{ +} + +static inline void nfp_net_debugfs_destroy(void) +{ +} + +static inline void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ +} + +static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ +} +#endif /* CONFIG_NFP_NET_DEBUG */ + +#endif /* _NFP_NET_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c new file mode 100644 index 000000000000..c96d641306d7 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -0,0 +1,2449 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_common.c + * Netronome network device driver: Common functions between PF and VF + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + * Chris Telfer <chris.telfer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/ethtool.h> +#include <linux/log2.h> +#include <linux/if_vlan.h> +#include <linux/random.h> + +#include <linux/ktime.h> + +#include <net/vxlan.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/** + * nfp_net_get_fw_version() - Read and parse the FW version + * @fw_ver: Output fw_version structure to read to + * @ctrl_bar: Mapped address of the control BAR + */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar) +{ + u32 reg; + + reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); + put_unaligned_le32(reg, fw_ver); +} + +/** + * nfp_net_reconfig() - Reconfigure the firmware + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Write the update word to the BAR and ping the reconfig queue. The + * poll until the firmware has acknowledged the update by zeroing the + * update word. + * + * Return: Negative errno on error, 0 on success + */ +int nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int cnt, ret = 0; + u32 new; + + spin_lock_bh(&nn->reconfig_lock); + + nn_writel(nn, NFP_NET_CFG_UPDATE, update); + /* ensure update is written before pinging HW */ + nn_pci_flush(nn); + nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); + + /* Poll update field, waiting for NFP to ack the config */ + for (cnt = 0; ; cnt++) { + new = nn_readl(nn, NFP_NET_CFG_UPDATE); + if (new == 0) + break; + if (new & NFP_NET_CFG_UPDATE_ERR) { + nn_err(nn, "Reconfig error: 0x%08x\n", new); + ret = -EIO; + break; + } else if (cnt >= NFP_NET_POLL_TIMEOUT) { + nn_err(nn, "Reconfig timeout for 0x%08x after %dms\n", + update, cnt); + ret = -EIO; + break; + } + mdelay(1); + } + + spin_unlock_bh(&nn->reconfig_lock); + return ret; +} + +/* Interrupt configuration and handling + */ + +/** + * nfp_net_irq_unmask_msix() - Unmask MSI-X after automasking + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * Clear the MSI-X table mask bit for the given entry bypassing Linux irq + * handling subsystem. Use *only* to reenable automasked vectors. + */ +static void nfp_net_irq_unmask_msix(struct nfp_net *nn, unsigned int entry_nr) +{ + struct list_head *msi_head = &nn->pdev->dev.msi_list; + struct msi_desc *entry; + u32 off; + + /* All MSI-Xs have the same mask_base */ + entry = list_first_entry(msi_head, struct msi_desc, list); + + off = (PCI_MSIX_ENTRY_SIZE * entry_nr) + + PCI_MSIX_ENTRY_VECTOR_CTRL; + writel(0, entry->mask_base + off); + readl(entry->mask_base); +} + +/** + * nfp_net_irq_unmask() - Unmask automasked interrupt + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * If MSI-X auto-masking is enabled clear the mask bit, otherwise + * clear the ICR for the entry. + */ +static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) +{ + if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) { + nfp_net_irq_unmask_msix(nn, entry_nr); + return; + } + + nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); + nn_pci_flush(nn); +} + +/** + * nfp_net_msix_alloc() - Try to allocate MSI-X irqs + * @nn: NFP Network structure + * @nr_vecs: Number of MSI-X vectors to allocate + * + * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. + * + * Return: Number of MSI-X vectors obtained or 0 on error. + */ +static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) +{ + struct pci_dev *pdev = nn->pdev; + int nvecs; + int i; + + for (i = 0; i < nr_vecs; i++) + nn->irq_entries[i].entry = i; + + nvecs = pci_enable_msix_range(pdev, nn->irq_entries, + NFP_NET_NON_Q_VECTORS + 1, nr_vecs); + if (nvecs < 0) { + nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", + NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); + return 0; + } + + return nvecs; +} + +/** + * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want + * @nn: NFP Network structure + * + * We want a vector per CPU (or ring), whatever is smaller plus + * NFP_NET_NON_Q_VECTORS for LSC etc. + * + * Return: Number of interrupts wanted + */ +static int nfp_net_irqs_wanted(struct nfp_net *nn) +{ + int ncpus; + int vecs; + + ncpus = num_online_cpus(); + + vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); + vecs = min_t(int, vecs, ncpus); + + return vecs + NFP_NET_NON_Q_VECTORS; +} + +/** + * nfp_net_irqs_alloc() - allocates MSI-X irqs + * @nn: NFP Network structure + * + * Return: Number of irqs obtained or 0 on error. + */ +int nfp_net_irqs_alloc(struct nfp_net *nn) +{ + int wanted_irqs; + + wanted_irqs = nfp_net_irqs_wanted(nn); + + nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); + if (nn->num_irqs == 0) { + nn_err(nn, "Failed to allocate MSI-X IRQs\n"); + return 0; + } + + nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; + + if (nn->num_irqs < wanted_irqs) + nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", + wanted_irqs, nn->num_irqs); + + return nn->num_irqs; +} + +/** + * nfp_net_irqs_disable() - Disable interrupts + * @nn: NFP Network structure + * + * Undoes what @nfp_net_irqs_alloc() does. + */ +void nfp_net_irqs_disable(struct nfp_net *nn) +{ + pci_disable_msix(nn->pdev); +} + +/** + * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + + napi_schedule_irqoff(&r_vec->napi); + + /* The FW auto-masks any interrupt, either via the MASK bit in + * the MSI-X table or via the per entry ICR field. So there + * is no need to disable interrupts here. + */ + return IRQ_HANDLED; +} + +/** + * nfp_net_read_link_status() - Reread link status from control BAR + * @nn: NFP Network structure + */ +static void nfp_net_read_link_status(struct nfp_net *nn) +{ + unsigned long flags; + bool link_up; + u32 sts; + + spin_lock_irqsave(&nn->link_status_lock, flags); + + sts = nn_readl(nn, NFP_NET_CFG_STS); + link_up = !!(sts & NFP_NET_CFG_STS_LINK); + + if (nn->link_up == link_up) + goto out; + + nn->link_up = link_up; + + if (nn->link_up) { + netif_carrier_on(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Up\n"); + } else { + netif_carrier_off(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Down\n"); + } +out: + spin_unlock_irqrestore(&nn->link_status_lock, flags); +} + +/** + * nfp_net_irq_lsc() - Interrupt service routine for link state changes + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_lsc(int irq, void *data) +{ + struct nfp_net *nn = data; + + nfp_net_read_link_status(nn); + + nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); + + return IRQ_HANDLED; +} + +/** + * nfp_net_irq_exn() - Interrupt service routine for exceptions + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_exn(int irq, void *data) +{ + struct nfp_net *nn = data; + + nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); + /* XXX TO BE IMPLEMENTED */ + return IRQ_HANDLED; +} + +/** + * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring + * @tx_ring: TX ring structure + */ +static void nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + tx_ring->qcidx = tx_ring->idx * nn->stride_tx; + tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); +} + +/** + * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring + * @rx_ring: RX ring structure + */ +static void nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; + rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); + + rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); + rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); +} + +/** + * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. + * @netdev: netdev structure + */ +static void nfp_net_irqs_assign(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct nfp_net_r_vector *r_vec; + int r; + + nn_assert(nn->num_irqs > 0, "num_irqs is zero\n"); + nn_assert(nn->num_r_vecs > 0, "num_r_vecs is zero\n"); + + /* Assumes nn->num_tx_rings == nn->num_rx_rings */ + if (nn->num_tx_rings > nn->num_r_vecs) { + nn_warn(nn, "More rings (%d) than vectors (%d).\n", + nn->num_tx_rings, nn->num_r_vecs); + nn->num_tx_rings = nn->num_r_vecs; + nn->num_rx_rings = nn->num_r_vecs; + } + + nn->lsc_handler = nfp_net_irq_lsc; + nn->exn_handler = nfp_net_irq_exn; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + r_vec->nfp_net = nn; + r_vec->handler = nfp_net_irq_rxtx; + r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; + + cpumask_set_cpu(r, &r_vec->affinity_mask); + + r_vec->tx_ring = &nn->tx_rings[r]; + nn->tx_rings[r].idx = r; + nn->tx_rings[r].r_vec = r_vec; + nfp_net_tx_ring_init(r_vec->tx_ring); + + r_vec->rx_ring = &nn->rx_rings[r]; + nn->rx_rings[r].idx = r; + nn->rx_rings[r].r_vec = r_vec; + nfp_net_rx_ring_init(r_vec->rx_ring); + } +} + +/** + * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @format: printf-style format to construct the interrupt name + * @name: Pointer to allocated space for interrupt name + * @name_sz: Size of space for interrupt name + * @vector_idx: Index of MSI-X vector used for this interrupt + * @handler: IRQ handler to register for this interrupt + */ +static int +nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, + const char *format, char *name, size_t name_sz, + unsigned int vector_idx, irq_handler_t handler) +{ + struct msix_entry *entry; + int err; + + entry = &nn->irq_entries[vector_idx]; + + snprintf(name, name_sz, format, netdev_name(nn->netdev)); + err = request_irq(entry->vector, handler, 0, name, nn); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + entry->vector, err); + return err; + } + nn_writeb(nn, ctrl_offset, vector_idx); + + return 0; +} + +/** + * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @vector_idx: Index of MSI-X vector used for this interrupt + */ +static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, + unsigned int vector_idx) +{ + nn_writeb(nn, ctrl_offset, 0xff); + free_irq(nn->irq_entries[vector_idx].vector, nn); +} + +/* Transmit + * + * One queue controller peripheral queue is used for transmit. The + * driver en-queues packets for transmit by advancing the write + * pointer. The device indicates that packets have transmitted by + * advancing the read pointer. The driver maintains a local copy of + * the read and write pointer in @struct nfp_net_tx_ring. The driver + * keeps @wr_p in sync with the queue controller write pointer and can + * determine how many packets have been transmitted by comparing its + * copy of the read pointer @rd_p with the read pointer maintained by + * the queue controller peripheral. + */ + +/** + * nfp_net_tx_full() - Check if the TX ring is full + * @tx_ring: TX ring to check + * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) + * + * This function checks, based on the *host copy* of read/write + * pointer if a given TX ring is full. The real TX queue may have + * some newly made available slots. + * + * Return: True if the ring is full. + */ +static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) +{ + return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); +} + +/* Wrappers for deciding when to stop and restart TX queues */ +static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) +{ + return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); +} + +static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) +{ + return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); +} + +/** + * nfp_net_tx_ring_stop() - stop tx ring + * @nd_q: netdev queue + * @tx_ring: driver tx queue structure + * + * Safely stop TX ring. Remember that while we are running .start_xmit() + * someone else may be cleaning the TX ring completions so we need to be + * extra careful here. + */ +static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, + struct nfp_net_tx_ring *tx_ring) +{ + netif_tx_stop_queue(nd_q); + + /* We can race with the TX completion out of NAPI so recheck */ + smp_mb(); + if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) + netif_tx_start_queue(nd_q); +} + +/** + * nfp_net_tx_tso() - Set up Tx descriptor for LSO + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to HW TX descriptor + * @skb: Pointer to SKB + * + * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. + * Return error on packet header greater than maximum supported LSO header size. + */ +static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + u32 hdrlen; + u16 mss; + + if (!skb_is_gso(skb)) + return; + + if (!skb->encapsulation) + hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); + else + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; + txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); + + mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; + txd->l4_offset = hdrlen; + txd->mss = cpu_to_le16(mss); + txd->flags |= PCIE_DESC_TX_LSO; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_lso++; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to TX descriptor + * @skb: Pointer to SKB + * + * This function sets the TX checksum flags in the TX descriptor based + * on the configuration and the protocol of the packet to be transmitted. + */ +static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + struct ipv6hdr *ipv6h; + struct iphdr *iph; + u8 l4_hdr; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) + return; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return; + + txd->flags |= PCIE_DESC_TX_CSUM; + if (skb->encapsulation) + txd->flags |= PCIE_DESC_TX_ENCAP; + + iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); + ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); + + if (iph->version == 4) { + txd->flags |= PCIE_DESC_TX_IP4_CSUM; + l4_hdr = iph->protocol; + } else if (ipv6h->version == 6) { + l4_hdr = ipv6h->nexthdr; + } else { + nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", + iph->version); + return; + } + + switch (l4_hdr) { + case IPPROTO_TCP: + txd->flags |= PCIE_DESC_TX_TCP_CSUM; + break; + case IPPROTO_UDP: + txd->flags |= PCIE_DESC_TX_UDP_CSUM; + break; + default: + nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", + l4_hdr); + return; + } + + u64_stats_update_begin(&r_vec->tx_sync); + if (skb->encapsulation) + r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; + else + r_vec->hw_csum_tx += txbuf->pkt_cnt; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx() - Main transmit entry point + * @skb: SKB to transmit + * @netdev: netdev structure + * + * Return: NETDEV_TX_OK on success. + */ +static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + const struct skb_frag_struct *frag; + struct nfp_net_r_vector *r_vec; + struct nfp_net_tx_desc *txd, txdg; + struct nfp_net_tx_buf *txbuf; + struct nfp_net_tx_ring *tx_ring; + struct netdev_queue *nd_q; + dma_addr_t dma_addr; + unsigned int fsize; + int f, nr_frags; + int wr_idx; + u16 qidx; + + qidx = skb_get_queue_mapping(skb); + tx_ring = &nn->tx_rings[qidx]; + r_vec = tx_ring->r_vec; + nd_q = netdev_get_tx_queue(nn->netdev, qidx); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + nr_frags = skb_shinfo(skb)->nr_frags; + + if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { + nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", + qidx, tx_ring->wr_p, tx_ring->rd_p); + netif_tx_stop_queue(nd_q); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_busy++; + u64_stats_update_end(&r_vec->tx_sync); + return NETDEV_TX_BUSY; + } + + /* Start with the head skbuf */ + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), + DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_free; + + wr_idx = tx_ring->wr_p % tx_ring->cnt; + + /* Stash the soft descriptor of the head then initialize it */ + txbuf = &tx_ring->txbufs[wr_idx]; + txbuf->skb = skb; + txbuf->dma_addr = dma_addr; + txbuf->fidx = -1; + txbuf->pkt_cnt = 1; + txbuf->real_len = skb->len; + + /* Build TX descriptor */ + txd = &tx_ring->txds[wr_idx]; + txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; + txd->dma_len = cpu_to_le16(skb_headlen(skb)); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->data_len = cpu_to_le16(skb->len); + + txd->flags = 0; + txd->mss = 0; + txd->l4_offset = 0; + + nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); + + nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); + + if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { + txd->flags |= PCIE_DESC_TX_VLAN; + txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + } + + /* Gather DMA */ + if (nr_frags > 0) { + /* all descs must match except for in addr, length and eop */ + txdg = *txd; + + for (f = 0; f < nr_frags; f++) { + frag = &skb_shinfo(skb)->frags[f]; + fsize = skb_frag_size(frag); + + dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, + fsize, DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_unmap; + + wr_idx = (wr_idx + 1) % tx_ring->cnt; + tx_ring->txbufs[wr_idx].skb = skb; + tx_ring->txbufs[wr_idx].dma_addr = dma_addr; + tx_ring->txbufs[wr_idx].fidx = f; + + txd = &tx_ring->txds[wr_idx]; + *txd = txdg; + txd->dma_len = cpu_to_le16(fsize); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->offset_eop = + (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_gather++; + u64_stats_update_end(&r_vec->tx_sync); + } + + netdev_tx_sent_queue(nd_q, txbuf->real_len); + + tx_ring->wr_p += nr_frags + 1; + if (nfp_net_tx_ring_should_stop(tx_ring)) + nfp_net_tx_ring_stop(nd_q, tx_ring); + + tx_ring->wr_ptr_add += nr_frags + 1; + if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { + /* force memory write before we let HW know */ + wmb(); + nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); + tx_ring->wr_ptr_add = 0; + } + + skb_tx_timestamp(skb); + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + return NETDEV_TX_OK; + +err_unmap: + --f; + while (f >= 0) { + frag = &skb_shinfo(skb)->frags[f]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[wr_idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; + wr_idx = wr_idx - 1; + if (wr_idx < 0) + wr_idx += tx_ring->cnt; + } + dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; +err_free: + nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_errors++; + u64_stats_update_end(&r_vec->tx_sync); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +/** + * nfp_net_tx_complete() - Handled completed TX packets + * @tx_ring: TX ring structure + * + * Return: Number of completed TX descriptors + */ +static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + u32 done_pkts = 0, done_bytes = 0; + struct sk_buff *skb; + int todo, nr_frags; + u32 qcp_rd_p; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + /* Work out how many descriptors have been transmitted */ + qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + + if (qcp_rd_p == tx_ring->qcp_rd_p) + return; + + if (qcp_rd_p > tx_ring->qcp_rd_p) + todo = qcp_rd_p - tx_ring->qcp_rd_p; + else + todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; + + while (todo--) { + idx = tx_ring->rd_p % tx_ring->cnt; + tx_ring->rd_p++; + + skb = tx_ring->txbufs[idx].skb; + if (!skb) + continue; + + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + + done_pkts += tx_ring->txbufs[idx].pkt_cnt; + done_bytes += tx_ring->txbufs[idx].real_len; + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + tx_ring->qcp_rd_p = qcp_rd_p; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_bytes += done_bytes; + r_vec->tx_pkts += done_pkts; + u64_stats_update_end(&r_vec->tx_sync); + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); + if (nfp_net_tx_ring_should_wake(tx_ring)) { + /* Make sure TX thread will see updated tx_ring->rd_p */ + smp_mb(); + + if (unlikely(netif_tx_queue_stopped(nd_q))) + netif_tx_wake_queue(nd_q); + } + + return; +} + +/** + * nfp_net_tx_flush() - Free any untransmitted buffers currently on the TX ring + * @tx_ring: TX ring structure + * + * Assumes that the device is stopped + */ +static void nfp_net_tx_flush(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + struct sk_buff *skb; + int nr_frags; + int fidx; + int idx; + + nn_assert((tx_ring->wr_p - tx_ring->rd_p) <= tx_ring->cnt, + "rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); + + while (tx_ring->rd_p != tx_ring->wr_p) { + idx = tx_ring->rd_p % tx_ring->cnt; + + skb = tx_ring->txbufs[idx].skb; + if (skb) { + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), + DMA_TO_DEVICE); + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), + DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + memset(&tx_ring->txds[idx], 0, sizeof(tx_ring->txds[idx])); + + tx_ring->qcp_rd_p++; + tx_ring->rd_p++; + } + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_reset_queue(nd_q); +} + +static void nfp_net_tx_timeout(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < nn->num_tx_rings; i++) { + if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) + continue; + nn_warn(nn, "TX timeout on ring: %d\n", i); + } + nn_warn(nn, "TX watchdog timeout\n"); +} + +/* Receive processing + */ + +/** + * nfp_net_rx_space() - return the number of free slots on the RX ring + * @rx_ring: RX ring structure + * + * Make sure we leave at least one slot free. + * + * Return: True if there is space on the RX ring + */ +static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring) +{ + return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p); +} + +/** + * nfp_net_rx_alloc_one() - Allocate and map skb for RX + * @rx_ring: RX ring structure of the skb + * @dma_addr: Pointer to storage for DMA address (output param) + * + * This function will allcate a new skb, map it for DMA. + * + * Return: allocated skb or NULL on failure. + */ +static struct sk_buff * +nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct sk_buff *skb; + + skb = netdev_alloc_skb(nn->netdev, nn->fl_bufsz); + if (!skb) { + nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); + return NULL; + } + + *dma_addr = dma_map_single(&nn->pdev->dev, skb->data, + nn->fl_bufsz, DMA_FROM_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { + dev_kfree_skb_any(skb); + nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); + return NULL; + } + + return skb; +} + +/** + * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings + * @rx_ring: RX ring structure + * @skb: Skb to put on rings + * @dma_addr: DMA address of skb mapping + */ +static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring, + struct sk_buff *skb, dma_addr_t dma_addr) +{ + unsigned int wr_idx; + + wr_idx = rx_ring->wr_p % rx_ring->cnt; + + /* Stash SKB and DMA address away */ + rx_ring->rxbufs[wr_idx].skb = skb; + rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; + + /* Fill freelist descriptor */ + rx_ring->rxds[wr_idx].fld.reserved = 0; + rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; + nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr); + + rx_ring->wr_p++; + rx_ring->wr_ptr_add++; + if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) { + /* Update write pointer of the freelist queue. Make + * sure all writes are flushed before telling the hardware. + */ + wmb(); + nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add); + rx_ring->wr_ptr_add = 0; + } +} + +/** + * nfp_net_rx_flush() - Free any buffers currently on the RX ring + * @rx_ring: RX ring to remove buffers from + * + * Assumes that the device is stopped + */ +static void nfp_net_rx_flush(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int idx; + + while (rx_ring->rd_p != rx_ring->wr_p) { + idx = rx_ring->rd_p % rx_ring->cnt; + + if (rx_ring->rxbufs[idx].skb) { + dma_unmap_single(&pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_ring->rxbufs[idx].skb); + rx_ring->rxbufs[idx].dma_addr = 0; + rx_ring->rxbufs[idx].skb = NULL; + } + + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + } +} + +/** + * nfp_net_rx_fill_freelist() - Attempt filling freelist with RX buffers + * @rx_ring: RX ring to fill + * + * Try to fill as many buffers as possible into freelist. Return + * number of buffers added. + * + * Return: Number of freelist buffers added. + */ +static int nfp_net_rx_fill_freelist(struct nfp_net_rx_ring *rx_ring) +{ + struct sk_buff *skb; + dma_addr_t dma_addr; + + while (nfp_net_rx_space(rx_ring)) { + skb = nfp_net_rx_alloc_one(rx_ring, &dma_addr); + if (!skb) { + nfp_net_rx_flush(rx_ring); + return -ENOMEM; + } + nfp_net_rx_give_one(rx_ring, skb, dma_addr); + } + + return 0; +} + +/** + * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors + * @flags: RX descriptor flags field in CPU byte order + */ +static int nfp_net_rx_csum_has_errors(u16 flags) +{ + u16 csum_all_checked, csum_all_ok; + + csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; + csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; + + return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); +} + +/** + * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags + * @nn: NFP Net device + * @r_vec: per-ring structure + * @rxd: Pointer to RX descriptor + * @skb: Pointer to SKB + */ +static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_rx_desc *rxd, struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + if (!(nn->netdev->features & NETIF_F_RXCSUM)) + return; + + if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_error++; + u64_stats_update_end(&r_vec->rx_sync); + return; + } + + /* Assume that the firmware will never report inner CSUM_OK unless outer + * L4 headers were successfully parsed. FW will always report zero UDP + * checksum as CSUM_OK. + */ + if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } + + if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_inner_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } +} + +/** + * nfp_net_set_hash() - Set SKB hash data + * @netdev: adapter's net_device structure + * @skb: SKB to set the hash data on + * @rxd: RX descriptor + * + * The RSS hash and hash-type are pre-pended to the packet data. + * Extract and decode it and set the skb fields. + */ +static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, + struct nfp_net_rx_desc *rxd) +{ + struct nfp_net_rx_hash *rx_hash; + + if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS) || + !(netdev->features & NETIF_F_RXHASH)) + return; + + rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); + + switch (be32_to_cpu(rx_hash->hash_type)) { + case NFP_NET_RSS_IPV4: + case NFP_NET_RSS_IPV6: + case NFP_NET_RSS_IPV6_EX: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3); + break; + default: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4); + break; + } +} + +/** + * nfp_net_rx() - receive up to @budget packets on @rx_ring + * @rx_ring: RX ring to receive from + * @budget: NAPI budget + * + * Note, this function is separated out from the napi poll function to + * more cleanly separate packet receive code from other bookkeeping + * functions performed in the napi poll function. + * + * There are differences between the NFP-3200 firmware and the + * NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue + * to indicate that new packets have arrived. The NFP-6000 does not + * have this queue and uses the DD bit in the RX descriptor. This + * method cannot be used on the NFP-3200 as it causes a race + * condition: The RX ring write pointer on the NFP-3200 is updated + * after packets (and descriptors) have been DMAed. If the DD bit is + * used and subsequently the read pointer is updated this may lead to + * the RX queue to underflow (if the firmware has not yet update the + * write pointer). Therefore we use slightly ugly conditional code + * below to handle the differences. We may, in the future update the + * NFP-3200 firmware to behave the same as the firmware on the + * NFP-6000. + * + * Return: Number of packets received. + */ +static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + unsigned int data_len, meta_len; + int avail = 0, pkts_polled = 0; + struct sk_buff *skb, *new_skb; + struct nfp_net_rx_desc *rxd; + dma_addr_t new_dma_addr; + u32 qcp_wr_p; + int idx; + + if (nn->is_nfp3200) { + /* Work out how many packets arrived */ + qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + idx = rx_ring->rd_p % rx_ring->cnt; + + if (qcp_wr_p == idx) + /* No new packets */ + return 0; + + if (qcp_wr_p > idx) + avail = qcp_wr_p - idx; + else + avail = qcp_wr_p + rx_ring->cnt - idx; + } else { + avail = budget + 1; + } + + while (avail > 0 && pkts_polled < budget) { + idx = rx_ring->rd_p % rx_ring->cnt; + + rxd = &rx_ring->rxds[idx]; + if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) { + if (nn->is_nfp3200) + nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n", + rx_ring->idx, idx, + rxd->vals[0], rxd->vals[1]); + break; + } + /* Memory barrier to ensure that we won't do other reads + * before the DD bit. + */ + dma_rmb(); + + rx_ring->rd_p++; + pkts_polled++; + avail--; + + skb = rx_ring->rxbufs[idx].skb; + + new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr); + if (!new_skb) { + nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[idx].skb, + rx_ring->rxbufs[idx].dma_addr); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_drops++; + u64_stats_update_end(&r_vec->rx_sync); + continue; + } + + nn_assert(le16_to_cpu(rxd->rxd.data_len) <= nn->fl_bufsz, + "RX data larger than freelist buffer (%u > %u) on %d:%u rxd[0]=%#x rxd[1]=%#x\n", + le16_to_cpu(rxd->rxd.data_len), nn->fl_bufsz, + rx_ring->idx, idx, rxd->vals[0], rxd->vals[1]); + + dma_unmap_single(&nn->pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + + nfp_net_rx_give_one(rx_ring, new_skb, new_dma_addr); + + meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; + data_len = le16_to_cpu(rxd->rxd.data_len); + + if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) { + /* The packet data starts after the metadata */ + skb_reserve(skb, meta_len); + } else { + /* The packet data starts at a fixed offset */ + skb_reserve(skb, nn->rx_offset); + } + + /* Adjust the SKB for the dynamic meta data pre-pended */ + skb_put(skb, data_len - meta_len); + + nfp_net_set_hash(nn->netdev, skb, rxd); + + /* Pad small frames to minimum */ + if (skb_put_padto(skb, 60)) + break; + + /* Stats update */ + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_pkts++; + r_vec->rx_bytes += skb->len; + u64_stats_update_end(&r_vec->rx_sync); + + skb_record_rx_queue(skb, rx_ring->idx); + skb->protocol = eth_type_trans(skb, nn->netdev); + + nfp_net_rx_csum(nn, r_vec, rxd, skb); + + if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + le16_to_cpu(rxd->rxd.vlan)); + + napi_gro_receive(&rx_ring->r_vec->napi, skb); + } + + if (nn->is_nfp3200) + nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled); + + return pkts_polled; +} + +/** + * nfp_net_poll() - napi poll function + * @napi: NAPI structure + * @budget: NAPI budget + * + * Return: number of packets polled. + */ +static int nfp_net_poll(struct napi_struct *napi, int budget) +{ + struct nfp_net_r_vector *r_vec = + container_of(napi, struct nfp_net_r_vector, napi); + struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; + struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring; + struct nfp_net *nn = r_vec->nfp_net; + struct netdev_queue *txq; + unsigned int pkts_polled; + + tx_ring = &nn->tx_rings[rx_ring->idx]; + txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + nfp_net_tx_complete(tx_ring); + + pkts_polled = nfp_net_rx(rx_ring, budget); + + if (pkts_polled < budget) { + napi_complete_done(napi, pkts_polled); + nfp_net_irq_unmask(nn, r_vec->irq_idx); + } + + return pkts_polled; +} + +/* Setup and Configuration + */ + +/** + * nfp_net_tx_ring_free() - Free resources allocated to a TX ring + * @tx_ring: TX ring to free + */ +static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), 0); + + kfree(tx_ring->txbufs); + + if (tx_ring->txds) + dma_free_coherent(&pdev->dev, tx_ring->size, + tx_ring->txds, tx_ring->dma); + + tx_ring->cnt = 0; + tx_ring->wr_p = 0; + tx_ring->rd_p = 0; + tx_ring->qcp_rd_p = 0; + + tx_ring->txbufs = NULL; + tx_ring->txds = NULL; + tx_ring->dma = 0; + tx_ring->size = 0; +} + +/** + * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring + * @tx_ring: TX Ring structure to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + tx_ring->cnt = nn->txd_cnt; + + tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; + tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->txds) + goto err_alloc; + + sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; + tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); + if (!tx_ring->txbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), tx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), ilog2(tx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), r_vec->irq_idx); + + netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); + + nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", + tx_ring->idx, tx_ring->qcidx, + tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); + + return 0; + +err_alloc: + nfp_net_tx_ring_free(tx_ring); + return -ENOMEM; +} + +/** + * nfp_net_rx_ring_free() - Free resources allocated to a RX ring + * @rx_ring: RX ring to free + */ +static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), 0); + + kfree(rx_ring->rxbufs); + + if (rx_ring->rxds) + dma_free_coherent(&pdev->dev, rx_ring->size, + rx_ring->rxds, rx_ring->dma); + + rx_ring->cnt = 0; + rx_ring->wr_p = 0; + rx_ring->rd_p = 0; + + rx_ring->rxbufs = NULL; + rx_ring->rxds = NULL; + rx_ring->dma = 0; + rx_ring->size = 0; +} + +/** + * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring + * @rx_ring: RX ring to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + rx_ring->cnt = nn->rxd_cnt; + + rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; + rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->rxds) + goto err_alloc; + + sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; + rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); + if (!rx_ring->rxbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), rx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), ilog2(rx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), r_vec->irq_idx); + + nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", + rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, + rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); + + return 0; + +err_alloc: + nfp_net_rx_ring_free(rx_ring); + return -ENOMEM; +} + +static void __nfp_net_free_rings(struct nfp_net *nn, unsigned int n_free) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + + while (n_free--) { + r_vec = &nn->r_vecs[n_free]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + nfp_net_rx_ring_free(r_vec->rx_ring); + nfp_net_tx_ring_free(r_vec->tx_ring); + + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); + + netif_napi_del(&r_vec->napi); + } +} + +/** + * nfp_net_free_rings() - Free all ring resources + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_free_rings(struct nfp_net *nn) +{ + __nfp_net_free_rings(nn, nn->num_r_vecs); +} + +/** + * nfp_net_alloc_rings() - Allocate resources for RX and TX rings + * @nn: NFP Net device to reconfigure + * + * Return: 0 on success or negative errno on error. + */ +static int nfp_net_alloc_rings(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + int err; + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + /* Setup NAPI */ + netif_napi_add(nn->netdev, &r_vec->napi, + nfp_net_poll, NAPI_POLL_WEIGHT); + + snprintf(r_vec->name, sizeof(r_vec->name), + "%s-rxtx-%d", nn->netdev->name, r); + err = request_irq(entry->vector, r_vec->handler, 0, + r_vec->name, r_vec); + if (err) { + nn_dbg(nn, "Error requesting IRQ %d\n", entry->vector); + goto err_napi_del; + } + + irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); + + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", + r, entry->vector, entry->entry); + + /* Allocate TX ring resources */ + err = nfp_net_tx_ring_alloc(r_vec->tx_ring); + if (err) + goto err_free_irq; + + /* Allocate RX ring resources */ + err = nfp_net_rx_ring_alloc(r_vec->rx_ring); + if (err) + goto err_free_tx; + } + + return 0; + +err_free_tx: + nfp_net_tx_ring_free(r_vec->tx_ring); +err_free_irq: + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); +err_napi_del: + netif_napi_del(&r_vec->napi); + __nfp_net_free_rings(nn, r); + return err; +} + +/** + * nfp_net_rss_write_itbl() - Write RSS indirection table to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_itbl(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, + get_unaligned_le32(nn->rss_itbl + i)); +} + +/** + * nfp_net_rss_write_key() - Write RSS hash key to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_key(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, + get_unaligned_le32(nn->rss_key + i)); +} + +/** + * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW + * @nn: NFP Net device to reconfigure + */ +void nfp_net_coalesce_write_cfg(struct nfp_net *nn) +{ + u8 i; + u32 factor; + u32 value; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* copy RX interrupt coalesce parameters */ + value = (nn->rx_coalesce_max_frames << 16) | + (factor * nn->rx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); + + /* copy TX interrupt coalesce parameters */ + value = (nn->tx_coalesce_max_frames << 16) | + (factor * nn->tx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); +} + +/** + * nfp_net_write_mac_addr() - Write mac address to device registers + * @nn: NFP Net device to reconfigure + * @mac: Six-byte MAC address to be written + * + * We do a bit of byte swapping dance because firmware is LE. + */ +static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) +{ + nn_writel(nn, NFP_NET_CFG_MACADDR + 0, + get_unaligned_be32(nn->netdev->dev_addr)); + /* We can't do writew for NFP-3200 compatibility */ + nn_writel(nn, NFP_NET_CFG_MACADDR + 4, + get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); +} + +/** + * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_clear_config_and_disable(struct nfp_net *nn) +{ + u32 new_ctrl, update; + int err; + + new_ctrl = nn->ctrl; + new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; + update = NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) { + nn_err(nn, "Could not disable device: %d\n", err); + return; + } + + nn->ctrl = new_ctrl; +} + +/** + * nfp_net_start_vec() - Start ring vector + * @nn: NFP Net device structure + * @r_vec: Ring vector to be started + */ +static int nfp_net_start_vec(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) +{ + unsigned int irq_vec; + int err = 0; + + irq_vec = nn->irq_entries[r_vec->irq_idx].vector; + + disable_irq(irq_vec); + + err = nfp_net_rx_fill_freelist(r_vec->rx_ring); + if (err) { + nn_err(nn, "RV%02d: couldn't allocate enough buffers\n", + r_vec->irq_idx); + goto out; + } + + napi_enable(&r_vec->napi); +out: + enable_irq(irq_vec); + + return err; +} + +static int nfp_net_netdev_open(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err, r; + u32 update = 0; + u32 new_ctrl; + + if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { + nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); + return -EBUSY; + } + + new_ctrl = nn->ctrl; + + /* Step 1: Allocate resources for rings and the like + * - Request interrupts + * - Allocate RX and TX ring resources + * - Setup initial RSS table + */ + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", + nn->exn_name, sizeof(nn->exn_name), + NFP_NET_IRQ_EXN_IDX, nn->exn_handler); + if (err) + return err; + + err = nfp_net_alloc_rings(nn); + if (err) + goto err_free_exn; + + err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); + if (err) + goto err_free_rings; + + err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); + if (err) + goto err_free_rings; + + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + nfp_net_rss_write_key(nn); + nfp_net_rss_write_itbl(nn); + nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); + update |= NFP_NET_CFG_UPDATE_RSS; + } + + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_coalesce_write_cfg(nn); + + new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + update |= NFP_NET_CFG_UPDATE_IRQMOD; + } + + /* Step 2: Configure the NFP + * - Enable rings from 0 to tx_rings/rx_rings - 1. + * - Write MAC address (in case it changed) + * - Set the MTU + * - Set the Freelist buffer size + * - Enable the FW + */ + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); + + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); + + nfp_net_write_mac_addr(nn, netdev->dev_addr); + + nn_writel(nn, NFP_NET_CFG_MTU, netdev->mtu); + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); + + /* Enable device */ + new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; + update |= NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + goto err_clear_config; + + nn->ctrl = new_ctrl; + + /* Since reconfiguration requests while NFP is down are ignored we + * have to wipe the entire VXLAN configuration and reinitialize it. + */ + if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { + memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); + memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); + vxlan_get_rx_port(netdev); + } + + /* Step 3: Enable for kernel + * - put some freelist descriptors on each RX ring + * - enable NAPI on each ring + * - enable all TX queues + * - set link state + */ + for (r = 0; r < nn->num_r_vecs; r++) { + err = nfp_net_start_vec(nn, &nn->r_vecs[r]); + if (err) + goto err_disable_napi; + } + + netif_tx_wake_all_queues(netdev); + + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", + nn->lsc_name, sizeof(nn->lsc_name), + NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); + if (err) + goto err_stop_tx; + nfp_net_read_link_status(nn); + + return 0; + +err_stop_tx: + netif_tx_disable(netdev); + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); +err_disable_napi: + while (r--) { + napi_disable(&nn->r_vecs[r].napi); + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + } +err_clear_config: + nfp_net_clear_config_and_disable(nn); +err_free_rings: + nfp_net_free_rings(nn); +err_free_exn: + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + return err; +} + +/** + * nfp_net_netdev_close() - Called when the device is downed + * @netdev: netdev structure + */ +static int nfp_net_netdev_close(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { + nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); + return 0; + } + + /* Step 1: Disable RX and TX rings from the Linux kernel perspective + */ + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); + netif_carrier_off(netdev); + nn->link_up = false; + + for (r = 0; r < nn->num_r_vecs; r++) + napi_disable(&nn->r_vecs[r].napi); + + netif_tx_disable(netdev); + + /* Step 2: Tell NFP + */ + nfp_net_clear_config_and_disable(nn); + + /* Step 3: Free resources + */ + for (r = 0; r < nn->num_r_vecs; r++) { + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); + } + + nfp_net_free_rings(nn); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + + nn_dbg(nn, "%s down", netdev->name); + return 0; +} + +static void nfp_net_set_rx_mode(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + + new_ctrl = nn->ctrl; + + if (netdev->flags & IFF_PROMISC) { + if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) + new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; + else + nn_warn(nn, "FW does not support promiscuous mode\n"); + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; + } + + if (new_ctrl == nn->ctrl) + return; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + if (nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN)) + return; + + nn->ctrl = new_ctrl; +} + +static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 tmp; + + nn_dbg(nn, "New MTU = %d\n", new_mtu); + + if (new_mtu < 68 || new_mtu > nn->max_mtu) { + nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); + return -EINVAL; + } + + netdev->mtu = new_mtu; + + /* Freelist buffer size rounded up to the nearest 1K */ + tmp = new_mtu + ETH_HLEN + VLAN_HLEN + NFP_NET_MAX_PREPEND; + nn->fl_bufsz = roundup(tmp, 1024); + + /* restart if running */ + if (netif_running(netdev)) { + nfp_net_netdev_close(netdev); + nfp_net_netdev_open(netdev); + } + + return 0; +} + +static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; + u64 data[3]; + unsigned int start; + + do { + start = u64_stats_fetch_begin(&r_vec->rx_sync); + data[0] = r_vec->rx_pkts; + data[1] = r_vec->rx_bytes; + data[2] = r_vec->rx_drops; + } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); + stats->rx_packets += data[0]; + stats->rx_bytes += data[1]; + stats->rx_dropped += data[2]; + + do { + start = u64_stats_fetch_begin(&r_vec->tx_sync); + data[0] = r_vec->tx_pkts; + data[1] = r_vec->tx_bytes; + data[2] = r_vec->tx_errors; + } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); + stats->tx_packets += data[0]; + stats->tx_bytes += data[1]; + stats->tx_errors += data[2]; + } + + return stats; +} + +static int nfp_net_set_features(struct net_device *netdev, + netdev_features_t features) +{ + netdev_features_t changed = netdev->features ^ features; + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + int err; + + /* Assume this is not called with features we have not advertised */ + + new_ctrl = nn->ctrl; + + if (changed & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; + } + + if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { + if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) + new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; + } + + if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { + if (features & (NETIF_F_TSO | NETIF_F_TSO6)) + new_ctrl |= NFP_NET_CFG_CTRL_LSO; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_TX) { + if (features & NETIF_F_HW_VLAN_CTAG_TX) + new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; + } + + if (changed & NETIF_F_SG) { + if (features & NETIF_F_SG) + new_ctrl |= NFP_NET_CFG_CTRL_GATHER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; + } + + nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", + netdev->features, features, changed); + + if (new_ctrl == nn->ctrl) + return 0; + + nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + nn->ctrl = new_ctrl; + + return 0; +} + +static netdev_features_t +nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + u8 l4_hdr; + + /* We can't do TSO over double tagged packets (802.1AD) */ + features &= vlan_features_check(skb, features); + + if (!skb->encapsulation) + return features; + + /* Ensure that inner L4 header offset fits into TX descriptor field */ + if (skb_is_gso(skb)) { + u32 hdrlen; + + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) + features &= ~NETIF_F_GSO_MASK; + } + + /* VXLAN/GRE check */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + } + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || + (l4_hdr == IPPROTO_UDP && + (skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + + return features; +} + +/** + * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW + * @nn: NFP Net device to reconfigure + * @idx: Index into the port table where new port should be written + * @port: UDP port to configure (pass zero to remove VXLAN port) + */ +static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) +{ + int i; + + nn->vxlan_ports[idx] = port; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) + return; + + BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) + nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), + be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | + be16_to_cpu(nn->vxlan_ports[i])); + + nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); +} + +/** + * nfp_net_find_vxlan_idx() - find table entry of the port or a free one + * @nn: NFP Network structure + * @port: UDP port to look for + * + * Return: if the port is already in the table -- it's position; + * if the port is not in the table -- free position to use; + * if the table is full -- -ENOSPC. + */ +static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) +{ + int i, free_idx = -ENOSPC; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { + if (nn->vxlan_ports[i] == port) + return i; + if (!nn->vxlan_usecnt[i]) + free_idx = i; + } + + return free_idx; +} + +static void nfp_net_add_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (idx == -ENOSPC) + return; + + if (!nn->vxlan_usecnt[idx]++) + nfp_net_set_vxlan_port(nn, idx, port); +} + +static void nfp_net_del_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (!nn->vxlan_usecnt[idx] || idx == -ENOSPC) + return; + + if (!--nn->vxlan_usecnt[idx]) + nfp_net_set_vxlan_port(nn, idx, 0); +} + +static const struct net_device_ops nfp_net_netdev_ops = { + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_features = nfp_net_set_features, + .ndo_features_check = nfp_net_features_check, + .ndo_add_vxlan_port = nfp_net_add_vxlan_port, + .ndo_del_vxlan_port = nfp_net_del_vxlan_port, +}; + +/** + * nfp_net_info() - Print general info about the NIC + * @nn: NFP Net device to reconfigure + */ +void nfp_net_info(struct nfp_net *nn) +{ + nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx", + nn->is_vf ? "VF " : "", + nn->num_tx_rings, nn->max_tx_rings, + nn->num_rx_rings, nn->max_rx_rings); + nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor, + nn->max_mtu); + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn->cap, + nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", + nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", + nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", + nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", + nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", + nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : ""); +} + +/** + * nfp_net_netdev_alloc() - Allocate netdev and related structure + * @pdev: PCI device + * @max_tx_rings: Maximum number of TX rings supported by device + * @max_rx_rings: Maximum number of RX rings supported by device + * + * This function allocates a netdev device and fills in the initial + * part of the @struct nfp_net structure. + * + * Return: NFP Net device structure, or ERR_PTR on error. + */ +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings) +{ + struct net_device *netdev; + struct nfp_net *nn; + int nqs; + + netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), + max_tx_rings, max_rx_rings); + if (!netdev) + return ERR_PTR(-ENOMEM); + + SET_NETDEV_DEV(netdev, &pdev->dev); + nn = netdev_priv(netdev); + + nn->netdev = netdev; + nn->pdev = pdev; + + nn->max_tx_rings = max_tx_rings; + nn->max_rx_rings = max_rx_rings; + + nqs = netif_get_num_default_rss_queues(); + nn->num_tx_rings = min_t(int, nqs, max_tx_rings); + nn->num_rx_rings = min_t(int, nqs, max_rx_rings); + + nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; + nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; + + spin_lock_init(&nn->reconfig_lock); + spin_lock_init(&nn->link_status_lock); + + return nn; +} + +/** + * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did + * @nn: NFP Net device to reconfigure + */ +void nfp_net_netdev_free(struct nfp_net *nn) +{ + free_netdev(nn->netdev); +} + +/** + * nfp_net_rss_init() - Set the initial RSS parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_rss_init(struct nfp_net *nn) +{ + int i; + + netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + + for (i = 0; i < sizeof(nn->rss_itbl); i++) + nn->rss_itbl[i] = + ethtool_rxfh_indir_default(i, nn->num_rx_rings); + + /* Enable IPv4/IPv6 TCP by default */ + nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | + NFP_NET_CFG_RSS_IPV6_TCP | + NFP_NET_CFG_RSS_TOEPLITZ | + NFP_NET_CFG_RSS_MASK; +} + +/** + * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_irqmod_init(struct nfp_net *nn) +{ + nn->rx_coalesce_usecs = 50; + nn->rx_coalesce_max_frames = 64; + nn->tx_coalesce_usecs = 50; + nn->tx_coalesce_max_frames = 64; +} + +/** + * nfp_net_netdev_init() - Initialise/finalise the netdev structure + * @netdev: netdev structure + * + * Return: 0 on success or negative errno on error. + */ +int nfp_net_netdev_init(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Get some of the read-only fields from the BAR */ + nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); + nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); + + nfp_net_write_mac_addr(nn, nn->netdev->dev_addr); + + /* Set default MTU and Freelist buffer size */ + if (nn->max_mtu < NFP_NET_DEFAULT_MTU) + netdev->mtu = nn->max_mtu; + else + netdev->mtu = NFP_NET_DEFAULT_MTU; + nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ; + + /* Advertise/enable offloads based on capabilities + * + * Note: netdev->features show the currently enabled features + * and netdev->hw_features advertises which features are + * supported. By default we enable most features. + */ + netdev->hw_features = NETIF_F_HIGHDMA; + if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { + netdev->hw_features |= NETIF_F_RXCSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { + netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; + } + if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { + netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + nn->ctrl |= NFP_NET_CFG_CTRL_LSO; + } + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + netdev->hw_features |= NETIF_F_RXHASH; + nfp_net_rss_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_RSS; + } + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && + nn->cap & NFP_NET_CFG_CTRL_NVGRE) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL; + nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; + + netdev->hw_enc_features = netdev->hw_features; + } + + netdev->vlan_features = netdev->hw_features; + + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; + nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + } + + netdev->features = netdev->hw_features; + + /* Advertise but disable TSO by default. */ + netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); + + /* Allow L2 Broadcast and Multicast through by default, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_L2BC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; + if (nn->cap & NFP_NET_CFG_CTRL_L2MC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; + + /* Allow IRQ moderation, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_irqmod_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + } + + /* On NFP-3200 enable MSI-X auto-masking, if supported and the + * interrupts are not shared. + */ + if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO) + nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO; + + /* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */ + if (nn->fw_ver.major >= 2) + nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); + else + nn->rx_offset = NFP_NET_RX_OFFSET; + + /* Stash the re-configuration queue away. First odd queue in TX Bar */ + nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; + + /* Make sure the FW knows the netdev is supposed to be disabled here */ + nn_writel(nn, NFP_NET_CFG_CTRL, 0); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | + NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + /* Finalise the netdev setup */ + ether_setup(netdev); + netdev->netdev_ops = &nfp_net_netdev_ops; + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + nfp_net_set_ethtool_ops(netdev); + nfp_net_irqs_assign(netdev); + + return register_netdev(netdev); +} + +/** + * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. + * @netdev: netdev structure + */ +void nfp_net_netdev_clean(struct net_device *netdev) +{ + unregister_netdev(netdev); +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h new file mode 100644 index 000000000000..8692003aeed8 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -0,0 +1,323 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ctrl.h + * Netronome network device driver: Control BAR layout + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#ifndef _NFP_NET_CTRL_H_ +#define _NFP_NET_CTRL_H_ + +/* IMPORTANT: This header file is shared with the FW, + * no OS specific constructs, please! + */ + +/** + * Configuration BAR size. + * + * The configuration BAR is 8K in size, but on the NFP6000, due to + * THB-350, 32k needs to be reserved. + */ +#define NFP_NET_CFG_BAR_SZ (32 * 1024) + +/** + * Offset in Freelist buffer where packet starts on RX + */ +#define NFP_NET_RX_OFFSET 32 + +/** + * Maximum header size supported for LSO frames + */ +#define NFP_NET_LSO_MAX_HDR_SZ 255 + +/** + * Hash type pre-pended when a RSS hash was computed + */ +#define NFP_NET_RSS_NONE 0 +#define NFP_NET_RSS_IPV4 1 +#define NFP_NET_RSS_IPV6 2 +#define NFP_NET_RSS_IPV6_EX 3 +#define NFP_NET_RSS_IPV4_TCP 4 +#define NFP_NET_RSS_IPV6_TCP 5 +#define NFP_NET_RSS_IPV6_EX_TCP 6 +#define NFP_NET_RSS_IPV4_UDP 7 +#define NFP_NET_RSS_IPV6_UDP 8 +#define NFP_NET_RSS_IPV6_EX_UDP 9 + +/** + * @NFP_NET_TXR_MAX: Maximum number of TX rings + * @NFP_NET_TXR_MASK: Mask for TX rings + * @NFP_NET_RXR_MAX: Maximum number of RX rings + * @NFP_NET_RXR_MASK: Mask for RX rings + */ +#define NFP_NET_TXR_MAX 64 +#define NFP_NET_TXR_MASK (NFP_NET_TXR_MAX - 1) +#define NFP_NET_RXR_MAX 64 +#define NFP_NET_RXR_MASK (NFP_NET_RXR_MAX - 1) + +/** + * Read/Write config words (0x0000 - 0x002c) + * @NFP_NET_CFG_CTRL: Global control + * @NFP_NET_CFG_UPDATE: Indicate which fields are updated + * @NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings + * @NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings + * @NFP_NET_CFG_MTU: Set MTU size + * @NFP_NET_CFG_FLBUFSZ: Set freelist buffer size (must be larger than MTU) + * @NFP_NET_CFG_EXN: MSI-X table entry for exceptions + * @NFP_NET_CFG_LSC: MSI-X table entry for link state changes + * @NFP_NET_CFG_MACADDR: MAC address + * + * TODO: + * - define Error details in UPDATE + */ +#define NFP_NET_CFG_CTRL 0x0000 +#define NFP_NET_CFG_CTRL_ENABLE (0x1 << 0) /* Global enable */ +#define NFP_NET_CFG_CTRL_PROMISC (0x1 << 1) /* Enable Promisc mode */ +#define NFP_NET_CFG_CTRL_L2BC (0x1 << 2) /* Allow L2 Broadcast */ +#define NFP_NET_CFG_CTRL_L2MC (0x1 << 3) /* Allow L2 Multicast */ +#define NFP_NET_CFG_CTRL_RXCSUM (0x1 << 4) /* Enable RX Checksum */ +#define NFP_NET_CFG_CTRL_TXCSUM (0x1 << 5) /* Enable TX Checksum */ +#define NFP_NET_CFG_CTRL_RXVLAN (0x1 << 6) /* Enable VLAN strip */ +#define NFP_NET_CFG_CTRL_TXVLAN (0x1 << 7) /* Enable VLAN insert */ +#define NFP_NET_CFG_CTRL_SCATTER (0x1 << 8) /* Scatter DMA */ +#define NFP_NET_CFG_CTRL_GATHER (0x1 << 9) /* Gather DMA */ +#define NFP_NET_CFG_CTRL_LSO (0x1 << 10) /* LSO/TSO */ +#define NFP_NET_CFG_CTRL_RINGCFG (0x1 << 16) /* Ring runtime changes */ +#define NFP_NET_CFG_CTRL_RSS (0x1 << 17) /* RSS */ +#define NFP_NET_CFG_CTRL_IRQMOD (0x1 << 18) /* Interrupt moderation */ +#define NFP_NET_CFG_CTRL_RINGPRIO (0x1 << 19) /* Ring priorities */ +#define NFP_NET_CFG_CTRL_MSIXAUTO (0x1 << 20) /* MSI-X auto-masking */ +#define NFP_NET_CFG_CTRL_TXRWB (0x1 << 21) /* Write-back of TX ring*/ +#define NFP_NET_CFG_CTRL_L2SWITCH (0x1 << 22) /* L2 Switch */ +#define NFP_NET_CFG_CTRL_L2SWITCH_LOCAL (0x1 << 23) /* Switch to local */ +#define NFP_NET_CFG_CTRL_VXLAN (0x1 << 24) /* VXLAN tunnel support */ +#define NFP_NET_CFG_CTRL_NVGRE (0x1 << 25) /* NVGRE tunnel support */ +#define NFP_NET_CFG_UPDATE 0x0004 +#define NFP_NET_CFG_UPDATE_GEN (0x1 << 0) /* General update */ +#define NFP_NET_CFG_UPDATE_RING (0x1 << 1) /* Ring config change */ +#define NFP_NET_CFG_UPDATE_RSS (0x1 << 2) /* RSS config change */ +#define NFP_NET_CFG_UPDATE_TXRPRIO (0x1 << 3) /* TX Ring prio change */ +#define NFP_NET_CFG_UPDATE_RXRPRIO (0x1 << 4) /* RX Ring prio change */ +#define NFP_NET_CFG_UPDATE_MSIX (0x1 << 5) /* MSI-X change */ +#define NFP_NET_CFG_UPDATE_L2SWITCH (0x1 << 6) /* Switch changes */ +#define NFP_NET_CFG_UPDATE_RESET (0x1 << 7) /* Update due to FLR */ +#define NFP_NET_CFG_UPDATE_IRQMOD (0x1 << 8) /* IRQ mod change */ +#define NFP_NET_CFG_UPDATE_VXLAN (0x1 << 9) /* VXLAN port change */ +#define NFP_NET_CFG_UPDATE_ERR (0x1 << 31) /* A error occurred */ +#define NFP_NET_CFG_TXRS_ENABLE 0x0008 +#define NFP_NET_CFG_RXRS_ENABLE 0x0010 +#define NFP_NET_CFG_MTU 0x0018 +#define NFP_NET_CFG_FLBUFSZ 0x001c +#define NFP_NET_CFG_EXN 0x001f +#define NFP_NET_CFG_LSC 0x0020 +#define NFP_NET_CFG_MACADDR 0x0024 + +/** + * Read-only words (0x0030 - 0x0050): + * @NFP_NET_CFG_VERSION: Firmware version number + * @NFP_NET_CFG_STS: Status + * @NFP_NET_CFG_CAP: Capabilities (same bits as @NFP_NET_CFG_CTRL) + * @NFP_NET_MAX_TXRINGS: Maximum number of TX rings + * @NFP_NET_MAX_RXRINGS: Maximum number of RX rings + * @NFP_NET_MAX_MTU: Maximum support MTU + * @NFP_NET_CFG_START_TXQ: Start Queue Control Queue to use for TX (PF only) + * @NFP_NET_CFG_START_RXQ: Start Queue Control Queue to use for RX (PF only) + * + * TODO: + * - define more STS bits + */ +#define NFP_NET_CFG_VERSION 0x0030 +#define NFP_NET_CFG_VERSION_RESERVED_MASK (0xff << 24) +#define NFP_NET_CFG_VERSION_CLASS_MASK (0xff << 16) +#define NFP_NET_CFG_VERSION_CLASS(x) (((x) & 0xff) << 16) +#define NFP_NET_CFG_VERSION_CLASS_GENERIC 0 +#define NFP_NET_CFG_VERSION_MAJOR_MASK (0xff << 8) +#define NFP_NET_CFG_VERSION_MAJOR(x) (((x) & 0xff) << 8) +#define NFP_NET_CFG_VERSION_MINOR_MASK (0xff << 0) +#define NFP_NET_CFG_VERSION_MINOR(x) (((x) & 0xff) << 0) +#define NFP_NET_CFG_STS 0x0034 +#define NFP_NET_CFG_STS_LINK (0x1 << 0) /* Link up or down */ +#define NFP_NET_CFG_CAP 0x0038 +#define NFP_NET_CFG_MAX_TXRINGS 0x003c +#define NFP_NET_CFG_MAX_RXRINGS 0x0040 +#define NFP_NET_CFG_MAX_MTU 0x0044 +/* Next two words are being used by VFs for solving THB350 issue */ +#define NFP_NET_CFG_START_TXQ 0x0048 +#define NFP_NET_CFG_START_RXQ 0x004c + +/** + * NFP-3200 workaround (0x0050 - 0x0058) + * @NFP_NET_CFG_SPARE_ADDR: DMA address for ME code to use (e.g. YDS-155 fix) + */ +#define NFP_NET_CFG_SPARE_ADDR 0x0050 +/** + * NFP6000/NFP4000 - Prepend configuration + */ +#define NFP_NET_CFG_RX_OFFSET 0x0050 +#define NFP_NET_CFG_RX_OFFSET_DYNAMIC 0 /* Prepend mode */ + +/** + * NFP6000/NFP4000 - VXLAN/UDP encap configuration + * @NFP_NET_CFG_VXLAN_PORT: Base address of table of tunnels' UDP dst ports + * @NFP_NET_CFG_VXLAN_SZ: Size of the UDP port table in bytes + */ +#define NFP_NET_CFG_VXLAN_PORT 0x0060 +#define NFP_NET_CFG_VXLAN_SZ 0x0008 + +/** + * 64B reserved for future use (0x0080 - 0x00c0) + */ +#define NFP_NET_CFG_RESERVED 0x0080 +#define NFP_NET_CFG_RESERVED_SZ 0x0040 + +/** + * RSS configuration (0x0100 - 0x01ac): + * Used only when NFP_NET_CFG_CTRL_RSS is enabled + * @NFP_NET_CFG_RSS_CFG: RSS configuration word + * @NFP_NET_CFG_RSS_KEY: RSS "secret" key + * @NFP_NET_CFG_RSS_ITBL: RSS indirection table + */ +#define NFP_NET_CFG_RSS_BASE 0x0100 +#define NFP_NET_CFG_RSS_CTRL NFP_NET_CFG_RSS_BASE +#define NFP_NET_CFG_RSS_MASK (0x7f) +#define NFP_NET_CFG_RSS_MASK_of(_x) ((_x) & 0x7f) +#define NFP_NET_CFG_RSS_IPV4 (1 << 8) /* RSS for IPv4 */ +#define NFP_NET_CFG_RSS_IPV6 (1 << 9) /* RSS for IPv6 */ +#define NFP_NET_CFG_RSS_IPV4_TCP (1 << 10) /* RSS for IPv4/TCP */ +#define NFP_NET_CFG_RSS_IPV4_UDP (1 << 11) /* RSS for IPv4/UDP */ +#define NFP_NET_CFG_RSS_IPV6_TCP (1 << 12) /* RSS for IPv6/TCP */ +#define NFP_NET_CFG_RSS_IPV6_UDP (1 << 13) /* RSS for IPv6/UDP */ +#define NFP_NET_CFG_RSS_TOEPLITZ (1 << 24) /* Use Toeplitz hash */ +#define NFP_NET_CFG_RSS_KEY (NFP_NET_CFG_RSS_BASE + 0x4) +#define NFP_NET_CFG_RSS_KEY_SZ 0x28 +#define NFP_NET_CFG_RSS_ITBL (NFP_NET_CFG_RSS_BASE + 0x4 + \ + NFP_NET_CFG_RSS_KEY_SZ) +#define NFP_NET_CFG_RSS_ITBL_SZ 0x80 + +/** + * TX ring configuration (0x200 - 0x800) + * @NFP_NET_CFG_TXR_BASE: Base offset for TX ring configuration + * @NFP_NET_CFG_TXR_ADDR: Per TX ring DMA address (8B entries) + * @NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries) + * @NFP_NET_CFG_TXR_SZ: Per TX ring ring size (1B entries) + * @NFP_NET_CFG_TXR_VEC: Per TX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_TXR_PRIO: Per TX ring priority (1B entries) + * @NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet + */ +#define NFP_NET_CFG_TXR_BASE 0x0200 +#define NFP_NET_CFG_TXR_ADDR(_x) (NFP_NET_CFG_TXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_WB_ADDR(_x) (NFP_NET_CFG_TXR_BASE + 0x200 + \ + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_SZ(_x) (NFP_NET_CFG_TXR_BASE + 0x400 + (_x)) +#define NFP_NET_CFG_TXR_VEC(_x) (NFP_NET_CFG_TXR_BASE + 0x440 + (_x)) +#define NFP_NET_CFG_TXR_PRIO(_x) (NFP_NET_CFG_TXR_BASE + 0x480 + (_x)) +#define NFP_NET_CFG_TXR_IRQ_MOD(_x) (NFP_NET_CFG_TXR_BASE + 0x500 + \ + ((_x) * 0x4)) + +/** + * RX ring configuration (0x0800 - 0x0c00) + * @NFP_NET_CFG_RXR_BASE: Base offset for RX ring configuration + * @NFP_NET_CFG_RXR_ADDR: Per RX ring DMA address (8B entries) + * @NFP_NET_CFG_RXR_SZ: Per RX ring ring size (1B entries) + * @NFP_NET_CFG_RXR_VEC: Per RX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_RXR_PRIO: Per RX ring priority (1B entries) + * @NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries) + */ +#define NFP_NET_CFG_RXR_BASE 0x0800 +#define NFP_NET_CFG_RXR_ADDR(_x) (NFP_NET_CFG_RXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_RXR_SZ(_x) (NFP_NET_CFG_RXR_BASE + 0x200 + (_x)) +#define NFP_NET_CFG_RXR_VEC(_x) (NFP_NET_CFG_RXR_BASE + 0x240 + (_x)) +#define NFP_NET_CFG_RXR_PRIO(_x) (NFP_NET_CFG_RXR_BASE + 0x280 + (_x)) +#define NFP_NET_CFG_RXR_IRQ_MOD(_x) (NFP_NET_CFG_RXR_BASE + 0x300 + \ + ((_x) * 0x4)) + +/** + * Interrupt Control/Cause registers (0x0c00 - 0x0d00) + * These registers are only used when MSI-X auto-masking is not + * enabled (@NFP_NET_CFG_CTRL_MSIXAUTO not set). The array is index + * by MSI-X entry and are 1B in size. If an entry is zero, the + * corresponding entry is enabled. If the FW generates an interrupt, + * it writes a cause into the corresponding field. This also masks + * the MSI-X entry and the host driver must clear the register to + * re-enable the interrupt. + */ +#define NFP_NET_CFG_ICR_BASE 0x0c00 +#define NFP_NET_CFG_ICR(_x) (NFP_NET_CFG_ICR_BASE + (_x)) +#define NFP_NET_CFG_ICR_UNMASKED 0x0 +#define NFP_NET_CFG_ICR_RXTX 0x1 +#define NFP_NET_CFG_ICR_LSC 0x2 + +/** + * General device stats (0x0d00 - 0x0d90) + * all counters are 64bit. + */ +#define NFP_NET_CFG_STATS_BASE 0x0d00 +#define NFP_NET_CFG_STATS_RX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x00) +#define NFP_NET_CFG_STATS_RX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x08) +#define NFP_NET_CFG_STATS_RX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x10) +#define NFP_NET_CFG_STATS_RX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x18) +#define NFP_NET_CFG_STATS_RX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x20) +#define NFP_NET_CFG_STATS_RX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x28) +#define NFP_NET_CFG_STATS_RX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x30) +#define NFP_NET_CFG_STATS_RX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x38) +#define NFP_NET_CFG_STATS_RX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x40) + +#define NFP_NET_CFG_STATS_TX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x48) +#define NFP_NET_CFG_STATS_TX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x50) +#define NFP_NET_CFG_STATS_TX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x58) +#define NFP_NET_CFG_STATS_TX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x60) +#define NFP_NET_CFG_STATS_TX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x68) +#define NFP_NET_CFG_STATS_TX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x70) +#define NFP_NET_CFG_STATS_TX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x78) +#define NFP_NET_CFG_STATS_TX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x80) +#define NFP_NET_CFG_STATS_TX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x88) + +/** + * Per ring stats (0x1000 - 0x1800) + * options, 64bit per entry + * @NFP_NET_CFG_TXR_STATS: TX ring statistics (Packet and Byte count) + * @NFP_NET_CFG_RXR_STATS: RX ring statistics (Packet and Byte count) + */ +#define NFP_NET_CFG_TXR_STATS_BASE 0x1000 +#define NFP_NET_CFG_TXR_STATS(_x) (NFP_NET_CFG_TXR_STATS_BASE + \ + ((_x) * 0x10)) +#define NFP_NET_CFG_RXR_STATS_BASE 0x1400 +#define NFP_NET_CFG_RXR_STATS(_x) (NFP_NET_CFG_RXR_STATS_BASE + \ + ((_x) * 0x10)) + +#endif /* _NFP_NET_CTRL_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c new file mode 100644 index 000000000000..4c97c713121c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -0,0 +1,235 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/rtnetlink.h> + +#include "nfp_net.h" + +static struct dentry *nfp_dir; + +static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_rx_ring *rx_ring = file->private; + int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!rx_ring->r_vec || !rx_ring->r_vec->nfp_net) + goto out; + nn = rx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + rxd_cnt = rx_ring->cnt; + + fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl); + fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl); + rx_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_rx); + rx_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + + seq_printf(file, "RX[%02d]: H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d RX_RD=%d RX_WR=%d\n", + rx_ring->idx, rx_ring->rd_p, rx_ring->wr_p, + fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p); + + for (i = 0; i < rxd_cnt; i++) { + rxd = &rx_ring->rxds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x", i, + rxd->vals[0], rxd->vals[1]); + + skb = READ_ONCE(rx_ring->rxbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + + if (rx_ring->rxbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &rx_ring->rxbufs[i].dma_addr); + + if (i == rx_ring->rd_p % rxd_cnt) + seq_puts(file, " H_RD "); + if (i == rx_ring->wr_p % rxd_cnt) + seq_puts(file, " H_WR "); + if (i == fl_rd_p % rxd_cnt) + seq_puts(file, " FL_RD"); + if (i == fl_wr_p % rxd_cnt) + seq_puts(file, " FL_WR"); + if (i == rx_rd_p % rxd_cnt) + seq_puts(file, " RX_RD"); + if (i == rx_wr_p % rxd_cnt) + seq_puts(file, " RX_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); +} + +static const struct file_operations nfp_rx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_rx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_tx_ring *tx_ring = file->private; + struct nfp_net_tx_desc *txd; + int d_rd_p, d_wr_p, txd_cnt; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!tx_ring->r_vec || !tx_ring->r_vec->nfp_net) + goto out; + nn = tx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + txd_cnt = tx_ring->cnt; + + d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); + + seq_printf(file, "TX[%02d]: H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n", + tx_ring->idx, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); + + for (i = 0; i < txd_cnt; i++) { + txd = &tx_ring->txds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, + txd->vals[0], txd->vals[1], + txd->vals[2], txd->vals[3]); + + skb = READ_ONCE(tx_ring->txbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + if (tx_ring->txbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &tx_ring->txbufs[i].dma_addr); + + if (i == tx_ring->rd_p % txd_cnt) + seq_puts(file, " H_RD"); + if (i == tx_ring->wr_p % txd_cnt) + seq_puts(file, " H_WR"); + if (i == d_rd_p % txd_cnt) + seq_puts(file, " D_RD"); + if (i == d_wr_p % txd_cnt) + seq_puts(file, " D_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); +} + +static const struct file_operations nfp_tx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_tx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ + static struct dentry *queues, *tx, *rx; + char int_name[16]; + int i; + + if (IS_ERR_OR_NULL(nfp_dir)) + return; + + nn->debugfs_dir = debugfs_create_dir(pci_name(nn->pdev), nfp_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + /* Create queue debugging sub-tree */ + queues = debugfs_create_dir("queue", nn->debugfs_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + rx = debugfs_create_dir("rx", queues); + tx = debugfs_create_dir("tx", queues); + if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx)) + return; + + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, rx, + &nn->rx_rings[i], &nfp_rx_q_fops); + } + + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, tx, + &nn->tx_rings[i], &nfp_tx_q_fops); + } +} + +void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ + debugfs_remove_recursive(nn->debugfs_dir); + nn->debugfs_dir = NULL; +} + +void nfp_net_debugfs_create(void) +{ + nfp_dir = debugfs_create_dir("nfp_net", NULL); +} + +void nfp_net_debugfs_destroy(void) +{ + debugfs_remove_recursive(nfp_dir); + nfp_dir = NULL; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c new file mode 100644 index 000000000000..9a4084a68db5 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -0,0 +1,640 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ethtool.c + * Netronome network device driver: ethtool support + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/ethtool.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/* Support for stats. Returns netdev, driver, and device stats */ +enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; +struct _nfp_net_et_stats { + char name[ETH_GSTRING_LEN]; + int type; + int sz; + int off; +}; + +#define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ + FIELD_SIZEOF(struct net_device_stats, m), \ + offsetof(struct net_device_stats, m) +/* For stats in the control BAR (other than Q stats) */ +#define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ + sizeof(u64), \ + (m) +static const struct _nfp_net_et_stats nfp_net_et_stats[] = { + /* netdev stats */ + {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, + {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, + {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, + {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, + {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, + {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, + {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, + {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, + {"multicast", NN_ET_NETDEV_STAT(multicast)}, + {"collisions", NN_ET_NETDEV_STAT(collisions)}, + {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, + {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, + {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, + {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, + {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, + {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, + {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, + {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, + /* Stats from the device */ + {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, + {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, + {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, + {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, + {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, + {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, + {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, + {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, + {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, + + {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, + {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, + {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, + {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, + {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, + {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, + {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, + {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, + {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, +}; + +#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) +#define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) +#define NN_ET_RVEC_GATHER_STATS 7 +#define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) +#define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ + NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) + +static void nfp_net_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + struct nfp_net *nn = netdev_priv(netdev); + + strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); + strlcpy(drvinfo->version, nfp_net_driver_version, + sizeof(drvinfo->version)); + + snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), + "%d.%d.%d.%d", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor); + strlcpy(drvinfo->bus_info, pci_name(nn->pdev), + sizeof(drvinfo->bus_info)); + + drvinfo->n_stats = NN_ET_STATS_LEN; + drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + + ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; + ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; + ring->rx_pending = nn->rxd_cnt; + ring->tx_pending = nn->txd_cnt; +} + +static int nfp_net_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 rxd_cnt, txd_cnt; + + if (netif_running(netdev)) { + /* Some NIC drivers allow reconfiguration on the fly, + * some down the interface, change and then up it + * again. For now we don't allow changes when the + * device is up. + */ + nn_warn(nn, "Can't change rings while device is up\n"); + return -EBUSY; + } + + /* We don't have separate queues/rings for small/large frames. */ + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + /* Round up to supported values */ + rxd_cnt = roundup_pow_of_two(ring->rx_pending); + rxd_cnt = max_t(u32, rxd_cnt, NFP_NET_MIN_RX_DESCS); + rxd_cnt = min_t(u32, rxd_cnt, NFP_NET_MAX_RX_DESCS); + + txd_cnt = roundup_pow_of_two(ring->tx_pending); + txd_cnt = max_t(u32, txd_cnt, NFP_NET_MIN_TX_DESCS); + txd_cnt = min_t(u32, txd_cnt, NFP_NET_MAX_TX_DESCS); + + if (nn->rxd_cnt != rxd_cnt || nn->txd_cnt != txd_cnt) + nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", + nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); + + nn->rxd_cnt = rxd_cnt; + nn->txd_cnt = txd_cnt; + + return 0; +} + +static void nfp_net_get_strings(struct net_device *netdev, + u32 stringset, u8 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + u8 *p = data; + int i; + + switch (stringset) { + case ETH_SS_STATS: + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_r_vecs; i++) { + sprintf(p, "rvec_%u_rx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_busy", i); + p += ETH_GSTRING_LEN; + } + strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_gather", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_lso", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(p, "txq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "txq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(p, "rxq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rxq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + break; + } +} + +static void nfp_net_get_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; + struct nfp_net *nn = netdev_priv(netdev); + struct rtnl_link_stats64 *netdev_stats; + struct rtnl_link_stats64 temp = {}; + u64 tmp[NN_ET_RVEC_GATHER_STATS]; + u8 __iomem *io_p; + int i, j, k; + u8 *p; + + netdev_stats = dev_get_stats(netdev, &temp); + + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + switch (nfp_net_et_stats[i].type) { + case NETDEV_ET_STATS: + p = (char *)netdev_stats + nfp_net_et_stats[i].off; + data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? + *(u64 *)p : *(u32 *)p; + break; + + case NFP_NET_DEV_ET_STATS: + io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; + data[i] = readq(io_p); + break; + } + } + for (j = 0; j < nn->num_r_vecs; j++) { + unsigned int start; + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); + data[i++] = nn->r_vecs[j].rx_pkts; + tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; + tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; + tmp[2] = nn->r_vecs[j].hw_csum_rx_error; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); + data[i++] = nn->r_vecs[j].tx_pkts; + data[i++] = nn->r_vecs[j].tx_busy; + tmp[3] = nn->r_vecs[j].hw_csum_tx; + tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; + tmp[5] = nn->r_vecs[j].tx_gather; + tmp[6] = nn->r_vecs[j].tx_lso; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); + + for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) + gathered_stats[k] += tmp[k]; + } + for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) + data[i++] = gathered_stats[j]; + for (j = 0; j < nn->num_tx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; + data[i++] = readq(io_p); + } + for (j = 0; j < nn->num_rx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; + data[i++] = readq(io_p); + } +} + +static int nfp_net_get_sset_count(struct net_device *netdev, int sset) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (sset) { + case ETH_SS_STATS: + return NN_ET_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +/* RX network flow classification (RSS, filters, etc) + */ +static u32 ethtool_flow_to_nfp_flag(u32 flow_type) +{ + static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = { + [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP, + [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP, + [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP, + [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP, + [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4, + [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6, + }; + + if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp)) + return 0; + + return xlate_ethtool_to_nfp[flow_type]; +} + +static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, + struct ethtool_rxnfc *cmd) +{ + u32 nfp_rss_flag; + + cmd->data = 0; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + if (nn->rss_cfg & nfp_rss_flag) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + + return 0; +} + +static int nfp_net_get_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd, u32 *rule_locs) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_GRXRINGS: + cmd->data = nn->num_rx_rings; + return 0; + case ETHTOOL_GRXFH: + return nfp_net_get_rss_hash_opts(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, + struct ethtool_rxnfc *nfc) +{ + u32 new_rss_cfg = nn->rss_cfg; + u32 nfp_rss_flag; + int err; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + /* RSS only supports IP SA/DA and L4 src/dst ports */ + if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | + RXH_L4_B_0_1 | RXH_L4_B_2_3)) + return -EINVAL; + + /* We need at least the IP SA/DA fields for hashing */ + if (!(nfc->data & RXH_IP_SRC) || + !(nfc->data & RXH_IP_DST)) + return -EINVAL; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~nfp_rss_flag; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= nfp_rss_flag; + break; + default: + return -EINVAL; + } + + new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; + new_rss_cfg |= NFP_NET_CFG_RSS_MASK; + + if (new_rss_cfg == nn->rss_cfg) + return 0; + + writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); + if (err) + return err; + + nn->rss_cfg = new_rss_cfg; + + nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); + return 0; +} + +static int nfp_net_set_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_SRXFH: + return nfp_net_set_rss_hash_opt(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return 0; + + return ARRAY_SIZE(nn->rss_itbl); +} + +static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev) +{ + return NFP_NET_CFG_RSS_KEY_SZ; +} + +static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, + u8 *hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + if (indir) + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + indir[i] = nn->rss_itbl[i]; + if (key) + memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + if (hfunc) + *hfunc = ETH_RSS_HASH_TOP; + + return 0; +} + +static int nfp_net_set_rxfh(struct net_device *netdev, + const u32 *indir, const u8 *key, + const u8 hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || + !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP)) + return -EOPNOTSUPP; + + if (!key && !indir) + return 0; + + if (key) { + memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ); + nfp_net_rss_write_key(nn); + } + if (indir) { + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + nn->rss_itbl[i] = indir[i]; + + nfp_net_rss_write_itbl(nn); + } + + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); +} + +/* Dump BAR registers + */ +static int nfp_net_get_regs_len(struct net_device *netdev) +{ + return NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_regs(struct net_device *netdev, + struct ethtool_regs *regs, void *p) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 *regs_buf = p; + int i; + + regs->version = nn_readl(nn, NFP_NET_CFG_VERSION); + + for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) + regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); +} + +static int nfp_net_get_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; + ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; + ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; + ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; + + return 0; +} + +static int nfp_net_set_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int factor; + + if (ec->rx_coalesce_usecs_irq || + ec->rx_max_coalesced_frames_irq || + ec->tx_coalesce_usecs_irq || + ec->tx_max_coalesced_frames_irq || + ec->stats_block_coalesce_usecs || + ec->use_adaptive_rx_coalesce || + ec->use_adaptive_tx_coalesce || + ec->pkt_rate_low || + ec->rx_coalesce_usecs_low || + ec->rx_max_coalesced_frames_low || + ec->tx_coalesce_usecs_low || + ec->tx_max_coalesced_frames_low || + ec->pkt_rate_high || + ec->rx_coalesce_usecs_high || + ec->rx_max_coalesced_frames_high || + ec->tx_coalesce_usecs_high || + ec->tx_max_coalesced_frames_high || + ec->rate_sample_interval) + return -ENOTSUPP; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* Each pair of (usecs, max_frames) fields specifies that interrupts + * should be coalesced until + * (usecs > 0 && time_since_first_completion >= usecs) || + * (max_frames > 0 && completed_frames >= max_frames) + * + * It is illegal to set both usecs and max_frames to zero as this would + * cause interrupts to never be generated. To disable coalescing, set + * usecs = 0 and max_frames = 1. + * + * Some implementations ignore the value of max_frames and use the + * condition time_since_first_completion >= usecs + */ + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + /* ensure valid configuration */ + if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) + return -EINVAL; + + if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) + return -EINVAL; + + if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + /* configuration is valid */ + nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; + nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; + nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; + nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; + + /* write configuration to device */ + nfp_net_coalesce_write_cfg(nn); + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); +} + +static const struct ethtool_ops nfp_net_ethtool_ops = { + .get_drvinfo = nfp_net_get_drvinfo, + .get_ringparam = nfp_net_get_ringparam, + .set_ringparam = nfp_net_set_ringparam, + .get_strings = nfp_net_get_strings, + .get_ethtool_stats = nfp_net_get_stats, + .get_sset_count = nfp_net_get_sset_count, + .get_rxnfc = nfp_net_get_rxnfc, + .set_rxnfc = nfp_net_set_rxnfc, + .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, + .get_rxfh_key_size = nfp_net_get_rxfh_key_size, + .get_rxfh = nfp_net_get_rxfh, + .set_rxfh = nfp_net_set_rxfh, + .get_regs_len = nfp_net_get_regs_len, + .get_regs = nfp_net_get_regs, + .get_coalesce = nfp_net_get_coalesce, + .set_coalesce = nfp_net_set_coalesce, +}; + +void nfp_net_set_ethtool_ops(struct net_device *netdev) +{ + netdev->ethtool_ops = &nfp_net_ethtool_ops; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c new file mode 100644 index 000000000000..e2b22b8a20f1 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c @@ -0,0 +1,385 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_netvf_main.c + * Netronome virtual function network device driver: Main entry point + * Author: Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/etherdevice.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +const char nfp_net_driver_name[] = "nfp_netvf"; +const char nfp_net_driver_version[] = "0.1"; +#define PCI_DEVICE_NFP6000VF 0x6003 +static const struct pci_device_id nfp_netvf_pci_device_ids[] = { + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { 0, } /* Required last entry. */ +}; +MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids); + +static void nfp_netvf_get_mac_addr(struct nfp_net *nn) +{ + u8 mac_addr[ETH_ALEN]; + + put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]); + /* We can't do readw for NFP-3200 compatibility */ + put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16, + &mac_addr[4]); + + if (!is_valid_ether_addr(mac_addr)) { + eth_hw_addr_random(nn->netdev); + return; + } + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); +} + +static int nfp_netvf_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + struct nfp_net_fw_version fw_ver; + int max_tx_rings, max_rx_rings; + u32 tx_bar_off, rx_bar_off; + u32 tx_bar_sz, rx_bar_sz; + int tx_bar_no, rx_bar_no; + u8 __iomem *ctrl_bar; + struct nfp_net *nn; + int is_nfp3200; + u32 startq; + int stride; + int err; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + err = pci_request_regions(pdev, nfp_net_driver_name); + if (err) { + dev_err(&pdev->dev, "Unable to allocate device memory.\n"); + goto err_pci_disable; + } + + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + is_nfp3200 = 0; + break; + default: + err = -ENODEV; + goto err_pci_regions; + } + + pci_set_master(pdev); + + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS)); + if (err) + goto err_pci_regions; + + /* Map the Control BAR. + * + * Irrespective of the advertised BAR size we only map the + * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code + * the identical for PF and VF drivers. + */ + ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CRTL_BAR), + NFP_NET_CFG_BAR_SZ); + if (!ctrl_bar) { + dev_err(&pdev->dev, + "Failed to map resource %d\n", NFP_NET_CRTL_BAR); + err = -EIO; + goto err_pci_regions; + } + + nfp_net_get_fw_version(&fw_ver, ctrl_bar); + if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) { + dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + + /* Determine stride */ + if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n"); + } else { + switch (fw_ver.major) { + case 1 ... 3: + if (is_nfp3200) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + } else { + stride = 4; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = tx_bar_no; + } + break; + default: + dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, + fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + } + + /* Find out how many rings are supported */ + max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS); + max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS); + + tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride; + rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride; + + /* Sanity checks */ + if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) { + dev_err(&pdev->dev, + "TX BAR too small for number of TX rings. Adjusting\n"); + tx_bar_sz = pci_resource_len(pdev, tx_bar_no); + max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) { + dev_err(&pdev->dev, + "RX BAR too small for number of RX rings. Adjusting\n"); + rx_bar_sz = pci_resource_len(pdev, rx_bar_no); + max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + + /* XXX Implement a workaround for THB-350 here. Ideally, we + * have a different PCI ID for A rev VFs. + */ + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tx_bar_off = NFP_PCIE_QUEUE(startq); + startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + rx_bar_off = NFP_PCIE_QUEUE(startq); + break; + default: + err = -ENODEV; + goto err_ctrl_unmap; + } + + /* Allocate and initialise the netdev */ + nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings); + if (IS_ERR(nn)) { + err = PTR_ERR(nn); + goto err_ctrl_unmap; + } + + nn->fw_ver = fw_ver; + nn->ctrl_bar = ctrl_bar; + nn->is_vf = 1; + nn->is_nfp3200 = is_nfp3200; + nn->stride_tx = stride; + nn->stride_rx = stride; + + if (rx_bar_no == tx_bar_no) { + u32 bar_off, bar_sz; + resource_size_t map_addr; + + /* Make a single overlapping BAR mapping */ + if (tx_bar_off < rx_bar_off) + bar_off = tx_bar_off; + else + bar_off = rx_bar_off; + + if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz)) + bar_sz = (tx_bar_off + tx_bar_sz) - bar_off; + else + bar_sz = (rx_bar_off + rx_bar_sz) - bar_off; + + map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off; + nn->q_bar = ioremap_nocache(map_addr, bar_sz); + if (!nn->q_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* TX queues */ + nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off); + /* RX queues */ + nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off); + } else { + resource_size_t map_addr; + + /* TX queues */ + map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off; + nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz); + if (!nn->tx_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* RX queues */ + map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off; + nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz); + if (!nn->rx_bar) { + nn_err(nn, "Failed to map resource %d\n", rx_bar_no); + err = -EIO; + goto err_unmap_tx; + } + } + + nfp_netvf_get_mac_addr(nn); + + err = nfp_net_irqs_alloc(nn); + if (!err) { + nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n"); + err = -EIO; + goto err_unmap_rx; + } + + /* Get ME clock frequency from ctrl BAR + * XXX for now frequency is hardcoded until we figure out how + * to get the value from nfp-hwinfo into ctrl bar + */ + nn->me_freq_mhz = 1200; + + err = nfp_net_netdev_init(nn->netdev); + if (err) + goto err_irqs_disable; + + pci_set_drvdata(pdev, nn); + + nfp_net_info(nn); + nfp_net_debugfs_adapter_add(nn); + + return 0; + +err_irqs_disable: + nfp_net_irqs_disable(nn); +err_unmap_rx: + if (!nn->q_bar) + iounmap(nn->rx_bar); +err_unmap_tx: + if (!nn->q_bar) + iounmap(nn->tx_bar); + else + iounmap(nn->q_bar); +err_netdev_free: + pci_set_drvdata(pdev, NULL); + nfp_net_netdev_free(nn); +err_ctrl_unmap: + iounmap(ctrl_bar); +err_pci_regions: + pci_release_regions(pdev); +err_pci_disable: + pci_disable_device(pdev); + return err; +} + +static void nfp_netvf_pci_remove(struct pci_dev *pdev) +{ + struct nfp_net *nn = pci_get_drvdata(pdev); + + /* Note, the order is slightly different from above as we need + * to keep the nn pointer around till we have freed everything. + */ + nfp_net_debugfs_adapter_del(nn); + + nfp_net_netdev_clean(nn->netdev); + + nfp_net_irqs_disable(nn); + + if (!nn->q_bar) { + iounmap(nn->rx_bar); + iounmap(nn->tx_bar); + } else { + iounmap(nn->q_bar); + } + iounmap(nn->ctrl_bar); + + pci_set_drvdata(pdev, NULL); + + nfp_net_netdev_free(nn); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver nfp_netvf_pci_driver = { + .name = nfp_net_driver_name, + .id_table = nfp_netvf_pci_device_ids, + .probe = nfp_netvf_pci_probe, + .remove = nfp_netvf_pci_remove, +}; + +static int __init nfp_netvf_init(void) +{ + int err; + + pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n", + nfp_net_driver_name); + + nfp_net_debugfs_create(); + err = pci_register_driver(&nfp_netvf_pci_driver); + if (err) { + nfp_net_debugfs_destroy(); + return err; + } + + return 0; +} + +static void __exit nfp_netvf_exit(void) +{ + pci_unregister_driver(&nfp_netvf_pci_driver); + nfp_net_debugfs_destroy(); +} + +module_init(nfp_netvf_init); +module_exit(nfp_netvf_exit); + +MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NFP VF network device driver"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* Re: [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-11-25 15:39 ` [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski @ 2015-11-30 15:42 ` David Miller 0 siblings, 0 replies; 17+ messages in thread From: David Miller @ 2015-11-30 15:42 UTC (permalink / raw) To: jakub.kicinski; +Cc: netdev, simon.horman, rolf.neugebauer From: Jakub Kicinski <jakub.kicinski@netronome.com> Date: Wed, 25 Nov 2015 15:39:04 +0000 > +config NFP_NET_DEBUG > + bool "Debug support for Netronome(R) NFP3200/NFP6000 NIC drivers" > + depends on NFP_NET || NFP_NETVF > + ---help--- > + Enable extra sanity checks and debugfs support in > + Netronome(R) NFP3200/NFP6000 NIC PF and VF drivers. > + Note: selecting this option may adversely impact > + performance. ... > +#ifdef CONFIG_NFP_NET_DEBUG > +#define nn_assert(cond, fmt, args...) \ > + do { \ > + if (unlikely(!(cond))) { \ > + pr_err("assertion %s failed\n", #cond); \ > + pr_err(fmt, ## args); \ > + BUG(); \ > + } \ > + } while (0) > +#else > +#define nn_assert(cond, fmt, args...) do { } while (0) > +#endif This is really not appropriate. Use WARN_ON() et al. as appropriate to assert things, and in particular _AVOID_ BUG() in pretty much all cases and attempt to continue running somehow with error handling paths etc. Use of BUG() is discouraged in all except the most extreme cases where the kernel cannot continue to execute at all. Thanks. ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver 2015-10-27 18:15 [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski ` (2 preceding siblings ...) 2015-11-25 15:39 ` [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski @ 2015-12-01 14:55 ` Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski ` (2 more replies) 3 siblings, 3 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-12-01 14:55 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski This patchset adds support for VFs of Netronome's NFP-4000 and NFP-6000 based NICs. We are currently also preparing the submission for the PF driver, but it is not quite ready yet. The PF driver can be found on GitHub: https://github.com/Netronome/nfp-drv-kmods Jakub Kicinski (2): pci_ids: add Netronome Systems vendor net: add driver for Netronome NFP4000/NFP6000 NIC VFs MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 36 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 748 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2432 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 ++++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 ++++ include/linux/pci_ids.h | 2 + 13 files changed, 4823 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c -- 1.9.1 ^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH net-next v5 1/2] pci_ids: add Netronome Systems vendor 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski @ 2015-12-01 14:55 ` Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-12-03 19:18 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver David Miller 2 siblings, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-12-01 14:55 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add PCI vendor id for Netronome Systems. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- include/linux/pci_ids.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index d9ba49cedc5d..1acbefc4bbda 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2495,6 +2495,8 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF2 0x1700 #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff +#define PCI_VENDOR_ID_NETRONOME 0x19ee + #define PCI_VENDOR_ID_QMI 0x1a32 #define PCI_VENDOR_ID_AZWAVE 0x1a3b -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH net-next v5 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski @ 2015-12-01 14:55 ` Jakub Kicinski 2015-12-03 19:18 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver David Miller 2 siblings, 0 replies; 17+ messages in thread From: Jakub Kicinski @ 2015-12-01 14:55 UTC (permalink / raw) To: netdev; +Cc: simon.horman, rolf.neugebauer, Jakub Kicinski Add driver for Virtual Functions for the Netronome's NFP-4000 and NFP-6000 based NICs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> --- v5: - remove useless asserts and convert remaining ones to properly handled warnings MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/netronome/Kconfig | 36 + drivers/net/ethernet/netronome/Makefile | 5 + drivers/net/ethernet/netronome/nfp/Makefile | 8 + drivers/net/ethernet/netronome/nfp/nfp_net.h | 748 ++++++ .../net/ethernet/netronome/nfp/nfp_net_common.c | 2432 ++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 323 +++ .../net/ethernet/netronome/nfp/nfp_net_debugfs.c | 235 ++ .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 640 ++++++ .../net/ethernet/netronome/nfp/nfp_netvf_main.c | 385 ++++ 12 files changed, 4821 insertions(+) create mode 100644 drivers/net/ethernet/netronome/Kconfig create mode 100644 drivers/net/ethernet/netronome/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/Makefile create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_common.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c diff --git a/MAINTAINERS b/MAINTAINERS index 9981db3f03ed..79029b4bfc80 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7364,6 +7364,13 @@ F: include/net/netrom.h F: include/uapi/linux/netrom.h F: net/netrom/ +NETRONOME ETHERNET DRIVERS +M: Jakub Kicinski <jakub.kicinski@netronome.com> +M: Rolf Neugebauer <rolf.neugebauer@netronome.com> +L: oss-drivers@netronome.com +S: Maintained +F: drivers/net/ethernet/netronome/ + NETWORK BLOCK DEVICE (NBD) M: Markus Pargmann <mpa@pengutronix.de> S: Maintained diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 955d06b9cdba..e57304397d33 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -121,6 +121,7 @@ config FEALNX cards. <http://www.myson.com.tw/> source "drivers/net/ethernet/natsemi/Kconfig" +source "drivers/net/ethernet/netronome/Kconfig" source "drivers/net/ethernet/8390/Kconfig" config NET_NETX diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 4a2ee98738f0..99ede51adf10 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_NET_VENDOR_MOXART) += moxa/ obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/ obj-$(CONFIG_FEALNX) += fealnx.o obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/ +obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/ obj-$(CONFIG_NET_NETX) += netx-eth.o obj-$(CONFIG_NET_VENDOR_NUVOTON) += nuvoton/ obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/ diff --git a/drivers/net/ethernet/netronome/Kconfig b/drivers/net/ethernet/netronome/Kconfig new file mode 100644 index 000000000000..9508ad782c30 --- /dev/null +++ b/drivers/net/ethernet/netronome/Kconfig @@ -0,0 +1,36 @@ +# +# Netronome device configuration +# + +config NET_VENDOR_NETRONOME + bool "Netronome(R) devices" + default y + ---help--- + If you have a Netronome(R) network (Ethernet) card or device, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Netronome(R) cards. If you say Y, you will be + asked for your specific card in the following questions. + +if NET_VENDOR_NETRONOME + +config NFP_NETVF + tristate "Netronome(R) NFP4000/NFP6000 VF NIC driver" + depends on PCI && PCI_MSI + depends on VXLAN || VXLAN=n + ---help--- + This driver supports SR-IOV virtual functions of + the Netronome(R) NFP4000/NFP6000 cards working as + a advanced Ethernet NIC. + +config NFP_NET_DEBUG + bool "Debug support for Netronome(R) NFP3200/NFP6000 NIC drivers" + depends on NFP_NET || NFP_NETVF + ---help--- + Enable extra sanity checks and debugfs support in + Netronome(R) NFP3200/NFP6000 NIC PF and VF drivers. + Note: selecting this option may adversely impact + performance. + +endif diff --git a/drivers/net/ethernet/netronome/Makefile b/drivers/net/ethernet/netronome/Makefile new file mode 100644 index 000000000000..dcb7b383f634 --- /dev/null +++ b/drivers/net/ethernet/netronome/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Netronome network device drivers +# + +obj-$(CONFIG_NFP_NETVF) += nfp/ diff --git a/drivers/net/ethernet/netronome/nfp/Makefile b/drivers/net/ethernet/netronome/nfp/Makefile new file mode 100644 index 000000000000..68178819ff12 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/Makefile @@ -0,0 +1,8 @@ +obj-$(CONFIG_NFP_NETVF) += nfp_netvf.o + +nfp_netvf-objs := \ + nfp_net_common.o \ + nfp_net_ethtool.o \ + nfp_netvf_main.o + +nfp_netvf-$(CONFIG_NFP_NET_DEBUG) += nfp_net_debugfs.o diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h new file mode 100644 index 000000000000..ab264e1bccd0 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -0,0 +1,748 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net.h + * Declarations for Netronome network device driver. + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#ifndef _NFP_NET_H_ +#define _NFP_NET_H_ + +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <asm-generic/io-64-nonatomic-hi-lo.h> + +#include "nfp_net_ctrl.h" + +#define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args) +#define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args) +#define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) +#define nn_dbg(nn, fmt, args...) netdev_dbg((nn)->netdev, fmt, ## args) +#define nn_warn_ratelimit(nn, fmt, args...) \ + do { \ + if (unlikely(net_ratelimit())) \ + netdev_warn((nn)->netdev, fmt, ## args); \ + } while (0) + +/* Max time to wait for NFP to respond on updates (in ms) */ +#define NFP_NET_POLL_TIMEOUT 5000 + +/* Bar allocation */ +#define NFP_NET_CRTL_BAR 0 +#define NFP_NET_Q0_BAR 2 +#define NFP_NET_Q1_BAR 4 /* OBSOLETE */ + +/* Max bits in DMA address */ +#define NFP_NET_MAX_DMA_BITS 40 + +/* Default size for MTU and freelist buffer sizes */ +#define NFP_NET_DEFAULT_MTU 1500 +#define NFP_NET_DEFAULT_RX_BUFSZ 2048 + +/* Maximum number of bytes prepended to a packet */ +#define NFP_NET_MAX_PREPEND 64 + +/* Interrupt definitions */ +#define NFP_NET_NON_Q_VECTORS 2 +#define NFP_NET_IRQ_LSC_IDX 0 +#define NFP_NET_IRQ_EXN_IDX 1 + +/* Queue/Ring definitions */ +#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ +#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ + +#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ +#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ +#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ +#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ + +#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ +#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ + +#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ + +/* Offload definitions */ +#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) + +/* Forward declarations */ +struct nfp_net; +struct nfp_net_r_vector; + +/* Convenience macro for writing dma address into RX/TX descriptors */ +#define nfp_desc_set_dma_addr(desc, dma_addr) \ + do { \ + __typeof(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ + __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ + } while (0) + +/* TX descriptor format */ + +#define PCIE_DESC_TX_EOP BIT(7) +#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) +#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) + +/* Flags in the host TX descriptor */ +#define PCIE_DESC_TX_CSUM BIT(7) +#define PCIE_DESC_TX_IP4_CSUM BIT(6) +#define PCIE_DESC_TX_TCP_CSUM BIT(5) +#define PCIE_DESC_TX_UDP_CSUM BIT(4) +#define PCIE_DESC_TX_VLAN BIT(3) +#define PCIE_DESC_TX_LSO BIT(2) +#define PCIE_DESC_TX_ENCAP BIT(1) +#define PCIE_DESC_TX_O_IP4_CSUM BIT(0) + +struct nfp_net_tx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of host buf address */ + __le16 dma_len; /* Length to DMA for this desc */ + u8 offset_eop; /* Offset in buf where pkt starts + + * highest bit is eop flag. + */ + __le32 dma_addr_lo; /* Low 32bit of host buf addr */ + + __le16 mss; /* MSS to be used for LSO */ + u8 l4_offset; /* LSO, where the L4 data starts */ + u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ + + __le16 vlan; /* VLAN tag to add if indicated */ + __le16 data_len; /* Length of frame + meta data */ + } __packed; + __le32 vals[4]; + }; +}; + +/** + * struct nfp_net_tx_buf - software TX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) + * @pkt_cnt: Number of packets to be produced out of the skb associated + * with this buffer (valid only on the head's buffer). + * Will be 1 for all non-TSO packets. + * @real_len: Number of bytes which to be produced out of the skb (valid only + * on the head's buffer). Equal to skb->len for non-TSO packets. + */ +struct nfp_net_tx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; + short int fidx; + u16 pkt_cnt; + u32 real_len; +}; + +/** + * struct nfp_net_tx_ring - TX ring structure + * @r_vec: Back pointer to ring vector structure + * @idx: Ring index from Linux's perspective + * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue + * @qcp_q: Pointer to base of the QCP TX queue + * @cnt: Size of the queue in number of descriptors + * @wr_p: TX ring write pointer (free running) + * @rd_p: TX ring read pointer (free running) + * @qcp_rd_p: Local copy of QCP TX queue read pointer + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for .xmit_more delayed kick) + * @txbufs: Array of transmitted TX buffers, to free on transmit + * @txds: Virtual address of TX ring in host memory + * @dma: DMA address of the TX ring + * @size: Size, in bytes, of the TX ring (needed to free) + */ +struct nfp_net_tx_ring { + struct nfp_net_r_vector *r_vec; + + u32 idx; + int qcidx; + u8 __iomem *qcp_q; + + u32 cnt; + u32 wr_p; + u32 rd_p; + u32 qcp_rd_p; + + u32 wr_ptr_add; + + struct nfp_net_tx_buf *txbufs; + struct nfp_net_tx_desc *txds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/* RX and freelist descriptor format */ + +#define PCIE_DESC_RX_DD BIT(7) +#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) + +/* Flags in the RX descriptor */ +#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) +#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) +#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) +#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) +#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) +#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) +#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) +#define PCIE_DESC_RX_SPARE cpu_to_le16(BIT(8)) +#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) +#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) +#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) +#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) +#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) +#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) +#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) +#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) + +#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ + PCIE_DESC_RX_TCP_CSUM | \ + PCIE_DESC_RX_UDP_CSUM | \ + PCIE_DESC_RX_I_IP4_CSUM | \ + PCIE_DESC_RX_I_TCP_CSUM | \ + PCIE_DESC_RX_I_UDP_CSUM) +#define PCIE_DESC_RX_CSUM_OK_SHIFT 1 +#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) +#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ + PCIE_DESC_RX_CSUM_OK_SHIFT) + +struct nfp_net_rx_desc { + union { + struct { + u8 dma_addr_hi; /* High bits of the buf address */ + __le16 reserved; /* Must be zero */ + u8 meta_len_dd; /* Must be zero */ + + __le32 dma_addr_lo; /* Low bits of the buffer address */ + } __packed fld; + + struct { + __le16 data_len; /* Length of the frame + meta data */ + u8 reserved; + u8 meta_len_dd; /* Length of meta data prepended + + * descriptor done flag. + */ + + __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ + __le16 vlan; /* VLAN if stripped */ + } __packed rxd; + + __le32 vals[2]; + }; +}; + +struct nfp_net_rx_hash { + __be32 hash_type; + __be32 hash; +}; + +/** + * struct nfp_net_rx_buf - software RX buffer descriptor + * @skb: sk_buff associated with this buffer + * @dma_addr: DMA mapping address of the buffer + */ +struct nfp_net_rx_buf { + struct sk_buff *skb; + dma_addr_t dma_addr; +}; + +/** + * struct nfp_net_rx_ring - RX ring structure + * @r_vec: Back pointer to ring vector structure + * @cnt: Size of the queue in number of descriptors + * @wr_p: FL/RX ring write pointer (free running) + * @rd_p: FL/RX ring read pointer (free running) + * @idx: Ring index from Linux's perspective + * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist + * @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue + * @qcp_fl: Pointer to base of the QCP freelist queue + * @qcp_rx: Pointer to base of the QCP RX queue + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for free list batching) + * @rxbufs: Array of transmitted FL/RX buffers + * @rxds: Virtual address of FL/RX ring in host memory + * @dma: DMA address of the FL/RX ring + * @size: Size, in bytes, of the FL/RX ring (needed to free) + */ +struct nfp_net_rx_ring { + struct nfp_net_r_vector *r_vec; + + u32 cnt; + u32 wr_p; + u32 rd_p; + + u16 idx; + u16 wr_ptr_add; + + int fl_qcidx; + int rx_qcidx; + u8 __iomem *qcp_fl; + u8 __iomem *qcp_rx; + + struct nfp_net_rx_buf *rxbufs; + struct nfp_net_rx_desc *rxds; + + dma_addr_t dma; + unsigned int size; +} ____cacheline_aligned; + +/** + * struct nfp_net_r_vector - Per ring interrupt vector configuration + * @nfp_net: Backpointer to nfp_net structure + * @napi: NAPI structure for this ring vec + * @tx_ring: Pointer to TX ring + * @rx_ring: Pointer to RX ring + * @irq_idx: Index into MSI-X table + * @rx_sync: Seqlock for atomic updates of RX stats + * @rx_pkts: Number of received packets + * @rx_bytes: Number of received bytes + * @rx_drops: Number of packets dropped on RX due to lack of resources + * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK + * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK + * @hw_csum_rx_error: Counter of packets with bad checksums + * @tx_sync: Seqlock for atomic updates of TX stats + * @tx_pkts: Number of Transmitted packets + * @tx_bytes: Number of Transmitted bytes + * @hw_csum_tx: Counter of packets with TX checksum offload requested + * @hw_csum_tx_inner: Counter of inner TX checksum offload requests + * @tx_gather: Counter of packets with Gather DMA + * @tx_lso: Counter of LSO packets sent + * @tx_errors: How many TX errors were encountered + * @tx_busy: How often was TX busy (no space)? + * @handler: Interrupt handler for this ring vector + * @name: Name of the interrupt vector + * @affinity_mask: SMP affinity mask for this vector + * + * This structure ties RX and TX rings to interrupt vectors and a NAPI + * context. This currently only supports one RX and TX ring per + * interrupt vector but might be extended in the future to allow + * association of multiple rings per vector. + */ +struct nfp_net_r_vector { + struct nfp_net *nfp_net; + struct napi_struct napi; + + struct nfp_net_tx_ring *tx_ring; + struct nfp_net_rx_ring *rx_ring; + + int irq_idx; + + struct u64_stats_sync rx_sync; + u64 rx_pkts; + u64 rx_bytes; + u64 rx_drops; + u64 hw_csum_rx_ok; + u64 hw_csum_rx_inner_ok; + u64 hw_csum_rx_error; + + struct u64_stats_sync tx_sync; + u64 tx_pkts; + u64 tx_bytes; + u64 hw_csum_tx; + u64 hw_csum_tx_inner; + u64 tx_gather; + u64 tx_lso; + u64 tx_errors; + u64 tx_busy; + + irq_handler_t handler; + char name[IFNAMSIZ + 8]; + cpumask_t affinity_mask; +} ____cacheline_aligned; + +/* Firmware version as it is written in the 32bit value in the BAR */ +struct nfp_net_fw_version { + u8 minor; + u8 major; + u8 class; + u8 resv; +} __packed; + +static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, + u8 resv, u8 class, u8 major, u8 minor) +{ + return fw_ver->resv == resv && + fw_ver->class == class && + fw_ver->major == major && + fw_ver->minor == minor; +} + +/** + * struct nfp_net - NFP network device structure + * @pdev: Backpointer to PCI device + * @netdev: Backpointer to net_device structure + * @nfp_fallback: Is the driver used in fallback mode? + * @is_vf: Is the driver attached to a VF? + * @is_nfp3200: Is the driver for a NFP-3200 card? + * @fw_loaded: Is the firmware loaded? + * @ctrl: Local copy of the control register/word. + * @fl_bufsz: Currently configured size of the freelist buffers + * @rx_offset: Offset in the RX buffers where packet data starts + * @cpp: Pointer to the CPP handle + * @nfp_dev_cpp: Pointer to the NFP Device handle + * @ctrl_area: Pointer to the CPP area for the control BAR + * @tx_area: Pointer to the CPP area for the TX queues + * @rx_area: Pointer to the CPP area for the FL/RX queues + * @fw_ver: Firmware version + * @cap: Capabilities advertised by the Firmware + * @max_mtu: Maximum support MTU advertised by the Firmware + * @rss_cfg: RSS configuration + * @rss_key: RSS secret key + * @rss_itbl: RSS indirection table + * @max_tx_rings: Maximum number of TX rings supported by the Firmware + * @max_rx_rings: Maximum number of RX rings supported by the Firmware + * @num_tx_rings: Currently configured number of TX rings + * @num_rx_rings: Currently configured number of RX rings + * @txd_cnt: Size of the TX ring in number of descriptors + * @rxd_cnt: Size of the RX ring in number of descriptors + * @tx_rings: Array of pre-allocated TX ring structures + * @rx_rings: Array of pre-allocated RX ring structures + * @num_irqs: Number of allocated interrupt vectors + * @num_r_vecs: Number of used ring vectors + * @r_vecs: Pre-allocated array of ring vectors + * @irq_entries: Pre-allocated array of MSI-X entries + * @lsc_handler: Handler for Link State Change interrupt + * @lsc_name: Name for Link State Change interrupt + * @exn_handler: Handler for Exception interrupt + * @exn_name: Name for Exception interrupt + * @shared_handler: Handler for shared interrupts + * @shared_name: Name for shared interrupt + * @me_freq_mhz: ME clock_freq (MHz) + * @reconfig_lock: Protects HW reconfiguration request regs/machinery + * @link_up: Is the link up? + * @link_status_lock: Protects @link_up and ensures atomicity with BAR reading + * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter + * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter + * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter + * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter + * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW + * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts + * @qcp_cfg: Pointer to QCP queue used for configuration notification + * @ctrl_bar: Pointer to mapped control BAR + * @tx_bar: Pointer to mapped TX queues + * @rx_bar: Pointer to mapped FL/RX queues + * @debugfs_dir: Device directory in debugfs + */ +struct nfp_net { + struct pci_dev *pdev; + struct net_device *netdev; + + unsigned nfp_fallback:1; + unsigned is_vf:1; + unsigned is_nfp3200:1; + unsigned fw_loaded:1; + + u32 ctrl; + u32 fl_bufsz; + + u32 rx_offset; + +#ifdef CONFIG_PCI_IOV + unsigned int num_vfs; + struct vf_data_storage *vfinfo; + int vf_rate_link_speed; +#endif + + struct nfp_cpp *cpp; + struct platform_device *nfp_dev_cpp; + struct nfp_cpp_area *ctrl_area; + struct nfp_cpp_area *tx_area; + struct nfp_cpp_area *rx_area; + + struct nfp_net_fw_version fw_ver; + u32 cap; + u32 max_mtu; + + u32 rss_cfg; + u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; + u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; + + int max_tx_rings; + int max_rx_rings; + + int num_tx_rings; + int num_rx_rings; + + int stride_tx; + int stride_rx; + + int txd_cnt; + int rxd_cnt; + + struct nfp_net_tx_ring tx_rings[NFP_NET_MAX_TX_RINGS]; + struct nfp_net_rx_ring rx_rings[NFP_NET_MAX_RX_RINGS]; + + u8 num_irqs; + u8 num_r_vecs; + struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS]; + struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS + + NFP_NET_MAX_TX_RINGS]; + + irq_handler_t lsc_handler; + char lsc_name[IFNAMSIZ + 8]; + + irq_handler_t exn_handler; + char exn_name[IFNAMSIZ + 8]; + + irq_handler_t shared_handler; + char shared_name[IFNAMSIZ + 8]; + + u32 me_freq_mhz; + + bool link_up; + spinlock_t link_status_lock; + + spinlock_t reconfig_lock; + + u32 rx_coalesce_usecs; + u32 rx_coalesce_max_frames; + u32 tx_coalesce_usecs; + u32 tx_coalesce_max_frames; + + __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; + u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; + + u8 __iomem *qcp_cfg; + + u8 __iomem *ctrl_bar; + u8 __iomem *q_bar; + u8 __iomem *tx_bar; + u8 __iomem *rx_bar; + + struct dentry *debugfs_dir; +}; + +/* Functions to read/write from/to a BAR + * Performs any endian conversion necessary. + */ +static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) +{ + writeb(val, nn->ctrl_bar + off); +} + +/* NFP-3200 can't handle 16-bit accesses too well - hence no readw/writew */ + +static inline u32 nn_readl(struct nfp_net *nn, int off) +{ + return readl(nn->ctrl_bar + off); +} + +static inline void nn_writel(struct nfp_net *nn, int off, u32 val) +{ + writel(val, nn->ctrl_bar + off); +} + +static inline u64 nn_readq(struct nfp_net *nn, int off) +{ + return readq(nn->ctrl_bar + off); +} + +static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) +{ + writeq(val, nn->ctrl_bar + off); +} + +/* Flush posted PCI writes by reading something without side effects */ +static inline void nn_pci_flush(struct nfp_net *nn) +{ + nn_readl(nn, NFP_NET_CFG_VERSION); +} + +/* Queue Controller Peripheral access functions and definitions. + * + * Some of the BARs of the NFP are mapped to portions of the Queue + * Controller Peripheral (QCP) address space on the NFP. A QCP queue + * has a read and a write pointer (as well as a size and flags, + * indicating overflow etc). The QCP offers a number of different + * operation on queue pointers, but here we only offer function to + * either add to a pointer or to read the pointer value. + */ +#define NFP_QCP_QUEUE_ADDR_SZ 0x800 +#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) +#define NFP_QCP_QUEUE_ADD_RPTR 0x0000 +#define NFP_QCP_QUEUE_ADD_WPTR 0x0004 +#define NFP_QCP_QUEUE_STS_LO 0x0008 +#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff +#define NFP_QCP_QUEUE_STS_HI 0x000c +#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff + +/* The offset of a QCP queues in the PCIe Target (same on NFP3200 and NFP6000 */ +#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) + +/* nfp_qcp_ptr - Read or Write Pointer of a queue */ +enum nfp_qcp_ptr { + NFP_QCP_READ_PTR = 0, + NFP_QCP_WRITE_PTR +}; + +/* There appear to be an *undocumented* upper limit on the value which + * one can add to a queue and that value is either 0x3f or 0x7f. We + * go with 0x3f as a conservative measure. + */ +#define NFP_QCP_MAX_ADD 0x3f + +static inline void _nfp_qcp_ptr_add(u8 __iomem *q, + enum nfp_qcp_ptr ptr, u32 val) +{ + u32 off; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_ADD_RPTR; + else + off = NFP_QCP_QUEUE_ADD_WPTR; + + while (val > NFP_QCP_MAX_ADD) { + writel(NFP_QCP_MAX_ADD, q + off); + val -= NFP_QCP_MAX_ADD; + } + + writel(val, q + off); +} + +/** + * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); +} + +/** + * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + * + * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. + */ +static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) +{ + _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); +} + +static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) +{ + u32 off; + u32 val; + + if (ptr == NFP_QCP_READ_PTR) + off = NFP_QCP_QUEUE_STS_LO; + else + off = NFP_QCP_QUEUE_STS_HI; + + val = readl(q + off); + + if (ptr == NFP_QCP_READ_PTR) + return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; + else + return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; +} + +/** + * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_READ_PTR); +} + +/** + * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); +} + +/* Globals */ +extern const char nfp_net_driver_name[]; +extern const char nfp_net_driver_version[]; + +/* Prototypes */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar); + +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings); +void nfp_net_netdev_free(struct nfp_net *nn); +int nfp_net_netdev_init(struct net_device *netdev); +void nfp_net_netdev_clean(struct net_device *netdev); +void nfp_net_set_ethtool_ops(struct net_device *netdev); +void nfp_net_info(struct nfp_net *nn); +int nfp_net_reconfig(struct nfp_net *nn, u32 update); +void nfp_net_rss_write_itbl(struct nfp_net *nn); +void nfp_net_rss_write_key(struct nfp_net *nn); +void nfp_net_coalesce_write_cfg(struct nfp_net *nn); +int nfp_net_irqs_alloc(struct nfp_net *nn); +void nfp_net_irqs_disable(struct nfp_net *nn); + +#ifdef CONFIG_NFP_NET_DEBUG +void nfp_net_debugfs_create(void); +void nfp_net_debugfs_destroy(void); +void nfp_net_debugfs_adapter_add(struct nfp_net *nn); +void nfp_net_debugfs_adapter_del(struct nfp_net *nn); +#else +static inline void nfp_net_debugfs_create(void) +{ +} + +static inline void nfp_net_debugfs_destroy(void) +{ +} + +static inline void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ +} + +static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ +} +#endif /* CONFIG_NFP_NET_DEBUG */ + +#endif /* _NFP_NET_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c new file mode 100644 index 000000000000..038ac6b14a60 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -0,0 +1,2432 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_common.c + * Netronome network device driver: Common functions between PF and VF + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + * Chris Telfer <chris.telfer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/ethtool.h> +#include <linux/log2.h> +#include <linux/if_vlan.h> +#include <linux/random.h> + +#include <linux/ktime.h> + +#include <net/vxlan.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/** + * nfp_net_get_fw_version() - Read and parse the FW version + * @fw_ver: Output fw_version structure to read to + * @ctrl_bar: Mapped address of the control BAR + */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar) +{ + u32 reg; + + reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); + put_unaligned_le32(reg, fw_ver); +} + +/** + * nfp_net_reconfig() - Reconfigure the firmware + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Write the update word to the BAR and ping the reconfig queue. The + * poll until the firmware has acknowledged the update by zeroing the + * update word. + * + * Return: Negative errno on error, 0 on success + */ +int nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int cnt, ret = 0; + u32 new; + + spin_lock_bh(&nn->reconfig_lock); + + nn_writel(nn, NFP_NET_CFG_UPDATE, update); + /* ensure update is written before pinging HW */ + nn_pci_flush(nn); + nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); + + /* Poll update field, waiting for NFP to ack the config */ + for (cnt = 0; ; cnt++) { + new = nn_readl(nn, NFP_NET_CFG_UPDATE); + if (new == 0) + break; + if (new & NFP_NET_CFG_UPDATE_ERR) { + nn_err(nn, "Reconfig error: 0x%08x\n", new); + ret = -EIO; + break; + } else if (cnt >= NFP_NET_POLL_TIMEOUT) { + nn_err(nn, "Reconfig timeout for 0x%08x after %dms\n", + update, cnt); + ret = -EIO; + break; + } + mdelay(1); + } + + spin_unlock_bh(&nn->reconfig_lock); + return ret; +} + +/* Interrupt configuration and handling + */ + +/** + * nfp_net_irq_unmask_msix() - Unmask MSI-X after automasking + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * Clear the MSI-X table mask bit for the given entry bypassing Linux irq + * handling subsystem. Use *only* to reenable automasked vectors. + */ +static void nfp_net_irq_unmask_msix(struct nfp_net *nn, unsigned int entry_nr) +{ + struct list_head *msi_head = &nn->pdev->dev.msi_list; + struct msi_desc *entry; + u32 off; + + /* All MSI-Xs have the same mask_base */ + entry = list_first_entry(msi_head, struct msi_desc, list); + + off = (PCI_MSIX_ENTRY_SIZE * entry_nr) + + PCI_MSIX_ENTRY_VECTOR_CTRL; + writel(0, entry->mask_base + off); + readl(entry->mask_base); +} + +/** + * nfp_net_irq_unmask() - Unmask automasked interrupt + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * If MSI-X auto-masking is enabled clear the mask bit, otherwise + * clear the ICR for the entry. + */ +static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) +{ + if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) { + nfp_net_irq_unmask_msix(nn, entry_nr); + return; + } + + nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); + nn_pci_flush(nn); +} + +/** + * nfp_net_msix_alloc() - Try to allocate MSI-X irqs + * @nn: NFP Network structure + * @nr_vecs: Number of MSI-X vectors to allocate + * + * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. + * + * Return: Number of MSI-X vectors obtained or 0 on error. + */ +static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) +{ + struct pci_dev *pdev = nn->pdev; + int nvecs; + int i; + + for (i = 0; i < nr_vecs; i++) + nn->irq_entries[i].entry = i; + + nvecs = pci_enable_msix_range(pdev, nn->irq_entries, + NFP_NET_NON_Q_VECTORS + 1, nr_vecs); + if (nvecs < 0) { + nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", + NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); + return 0; + } + + return nvecs; +} + +/** + * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want + * @nn: NFP Network structure + * + * We want a vector per CPU (or ring), whatever is smaller plus + * NFP_NET_NON_Q_VECTORS for LSC etc. + * + * Return: Number of interrupts wanted + */ +static int nfp_net_irqs_wanted(struct nfp_net *nn) +{ + int ncpus; + int vecs; + + ncpus = num_online_cpus(); + + vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); + vecs = min_t(int, vecs, ncpus); + + return vecs + NFP_NET_NON_Q_VECTORS; +} + +/** + * nfp_net_irqs_alloc() - allocates MSI-X irqs + * @nn: NFP Network structure + * + * Return: Number of irqs obtained or 0 on error. + */ +int nfp_net_irqs_alloc(struct nfp_net *nn) +{ + int wanted_irqs; + + wanted_irqs = nfp_net_irqs_wanted(nn); + + nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); + if (nn->num_irqs == 0) { + nn_err(nn, "Failed to allocate MSI-X IRQs\n"); + return 0; + } + + nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; + + if (nn->num_irqs < wanted_irqs) + nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", + wanted_irqs, nn->num_irqs); + + return nn->num_irqs; +} + +/** + * nfp_net_irqs_disable() - Disable interrupts + * @nn: NFP Network structure + * + * Undoes what @nfp_net_irqs_alloc() does. + */ +void nfp_net_irqs_disable(struct nfp_net *nn) +{ + pci_disable_msix(nn->pdev); +} + +/** + * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + + napi_schedule_irqoff(&r_vec->napi); + + /* The FW auto-masks any interrupt, either via the MASK bit in + * the MSI-X table or via the per entry ICR field. So there + * is no need to disable interrupts here. + */ + return IRQ_HANDLED; +} + +/** + * nfp_net_read_link_status() - Reread link status from control BAR + * @nn: NFP Network structure + */ +static void nfp_net_read_link_status(struct nfp_net *nn) +{ + unsigned long flags; + bool link_up; + u32 sts; + + spin_lock_irqsave(&nn->link_status_lock, flags); + + sts = nn_readl(nn, NFP_NET_CFG_STS); + link_up = !!(sts & NFP_NET_CFG_STS_LINK); + + if (nn->link_up == link_up) + goto out; + + nn->link_up = link_up; + + if (nn->link_up) { + netif_carrier_on(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Up\n"); + } else { + netif_carrier_off(nn->netdev); + netdev_info(nn->netdev, "NIC Link is Down\n"); + } +out: + spin_unlock_irqrestore(&nn->link_status_lock, flags); +} + +/** + * nfp_net_irq_lsc() - Interrupt service routine for link state changes + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_lsc(int irq, void *data) +{ + struct nfp_net *nn = data; + + nfp_net_read_link_status(nn); + + nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); + + return IRQ_HANDLED; +} + +/** + * nfp_net_irq_exn() - Interrupt service routine for exceptions + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_exn(int irq, void *data) +{ + struct nfp_net *nn = data; + + nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); + /* XXX TO BE IMPLEMENTED */ + return IRQ_HANDLED; +} + +/** + * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring + * @tx_ring: TX ring structure + */ +static void nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + tx_ring->qcidx = tx_ring->idx * nn->stride_tx; + tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); +} + +/** + * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring + * @rx_ring: RX ring structure + */ +static void nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + + rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; + rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); + + rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); + rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); +} + +/** + * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. + * @netdev: netdev structure + */ +static void nfp_net_irqs_assign(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct nfp_net_r_vector *r_vec; + int r; + + /* Assumes nn->num_tx_rings == nn->num_rx_rings */ + if (nn->num_tx_rings > nn->num_r_vecs) { + nn_warn(nn, "More rings (%d) than vectors (%d).\n", + nn->num_tx_rings, nn->num_r_vecs); + nn->num_tx_rings = nn->num_r_vecs; + nn->num_rx_rings = nn->num_r_vecs; + } + + nn->lsc_handler = nfp_net_irq_lsc; + nn->exn_handler = nfp_net_irq_exn; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + r_vec->nfp_net = nn; + r_vec->handler = nfp_net_irq_rxtx; + r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; + + cpumask_set_cpu(r, &r_vec->affinity_mask); + + r_vec->tx_ring = &nn->tx_rings[r]; + nn->tx_rings[r].idx = r; + nn->tx_rings[r].r_vec = r_vec; + nfp_net_tx_ring_init(r_vec->tx_ring); + + r_vec->rx_ring = &nn->rx_rings[r]; + nn->rx_rings[r].idx = r; + nn->rx_rings[r].r_vec = r_vec; + nfp_net_rx_ring_init(r_vec->rx_ring); + } +} + +/** + * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @format: printf-style format to construct the interrupt name + * @name: Pointer to allocated space for interrupt name + * @name_sz: Size of space for interrupt name + * @vector_idx: Index of MSI-X vector used for this interrupt + * @handler: IRQ handler to register for this interrupt + */ +static int +nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, + const char *format, char *name, size_t name_sz, + unsigned int vector_idx, irq_handler_t handler) +{ + struct msix_entry *entry; + int err; + + entry = &nn->irq_entries[vector_idx]; + + snprintf(name, name_sz, format, netdev_name(nn->netdev)); + err = request_irq(entry->vector, handler, 0, name, nn); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + entry->vector, err); + return err; + } + nn_writeb(nn, ctrl_offset, vector_idx); + + return 0; +} + +/** + * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @vector_idx: Index of MSI-X vector used for this interrupt + */ +static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, + unsigned int vector_idx) +{ + nn_writeb(nn, ctrl_offset, 0xff); + free_irq(nn->irq_entries[vector_idx].vector, nn); +} + +/* Transmit + * + * One queue controller peripheral queue is used for transmit. The + * driver en-queues packets for transmit by advancing the write + * pointer. The device indicates that packets have transmitted by + * advancing the read pointer. The driver maintains a local copy of + * the read and write pointer in @struct nfp_net_tx_ring. The driver + * keeps @wr_p in sync with the queue controller write pointer and can + * determine how many packets have been transmitted by comparing its + * copy of the read pointer @rd_p with the read pointer maintained by + * the queue controller peripheral. + */ + +/** + * nfp_net_tx_full() - Check if the TX ring is full + * @tx_ring: TX ring to check + * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) + * + * This function checks, based on the *host copy* of read/write + * pointer if a given TX ring is full. The real TX queue may have + * some newly made available slots. + * + * Return: True if the ring is full. + */ +static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) +{ + return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); +} + +/* Wrappers for deciding when to stop and restart TX queues */ +static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) +{ + return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); +} + +static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) +{ + return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); +} + +/** + * nfp_net_tx_ring_stop() - stop tx ring + * @nd_q: netdev queue + * @tx_ring: driver tx queue structure + * + * Safely stop TX ring. Remember that while we are running .start_xmit() + * someone else may be cleaning the TX ring completions so we need to be + * extra careful here. + */ +static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, + struct nfp_net_tx_ring *tx_ring) +{ + netif_tx_stop_queue(nd_q); + + /* We can race with the TX completion out of NAPI so recheck */ + smp_mb(); + if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) + netif_tx_start_queue(nd_q); +} + +/** + * nfp_net_tx_tso() - Set up Tx descriptor for LSO + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to HW TX descriptor + * @skb: Pointer to SKB + * + * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. + * Return error on packet header greater than maximum supported LSO header size. + */ +static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + u32 hdrlen; + u16 mss; + + if (!skb_is_gso(skb)) + return; + + if (!skb->encapsulation) + hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); + else + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; + txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); + + mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; + txd->l4_offset = hdrlen; + txd->mss = cpu_to_le16(mss); + txd->flags |= PCIE_DESC_TX_LSO; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_lso++; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor + * @nn: NFP Net device + * @r_vec: per-ring structure + * @txbuf: Pointer to driver soft TX descriptor + * @txd: Pointer to TX descriptor + * @skb: Pointer to SKB + * + * This function sets the TX checksum flags in the TX descriptor based + * on the configuration and the protocol of the packet to be transmitted. + */ +static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_buf *txbuf, + struct nfp_net_tx_desc *txd, struct sk_buff *skb) +{ + struct ipv6hdr *ipv6h; + struct iphdr *iph; + u8 l4_hdr; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) + return; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return; + + txd->flags |= PCIE_DESC_TX_CSUM; + if (skb->encapsulation) + txd->flags |= PCIE_DESC_TX_ENCAP; + + iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); + ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); + + if (iph->version == 4) { + txd->flags |= PCIE_DESC_TX_IP4_CSUM; + l4_hdr = iph->protocol; + } else if (ipv6h->version == 6) { + l4_hdr = ipv6h->nexthdr; + } else { + nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", + iph->version); + return; + } + + switch (l4_hdr) { + case IPPROTO_TCP: + txd->flags |= PCIE_DESC_TX_TCP_CSUM; + break; + case IPPROTO_UDP: + txd->flags |= PCIE_DESC_TX_UDP_CSUM; + break; + default: + nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", + l4_hdr); + return; + } + + u64_stats_update_begin(&r_vec->tx_sync); + if (skb->encapsulation) + r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; + else + r_vec->hw_csum_tx += txbuf->pkt_cnt; + u64_stats_update_end(&r_vec->tx_sync); +} + +/** + * nfp_net_tx() - Main transmit entry point + * @skb: SKB to transmit + * @netdev: netdev structure + * + * Return: NETDEV_TX_OK on success. + */ +static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + const struct skb_frag_struct *frag; + struct nfp_net_r_vector *r_vec; + struct nfp_net_tx_desc *txd, txdg; + struct nfp_net_tx_buf *txbuf; + struct nfp_net_tx_ring *tx_ring; + struct netdev_queue *nd_q; + dma_addr_t dma_addr; + unsigned int fsize; + int f, nr_frags; + int wr_idx; + u16 qidx; + + qidx = skb_get_queue_mapping(skb); + tx_ring = &nn->tx_rings[qidx]; + r_vec = tx_ring->r_vec; + nd_q = netdev_get_tx_queue(nn->netdev, qidx); + + nr_frags = skb_shinfo(skb)->nr_frags; + + if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { + nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", + qidx, tx_ring->wr_p, tx_ring->rd_p); + netif_tx_stop_queue(nd_q); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_busy++; + u64_stats_update_end(&r_vec->tx_sync); + return NETDEV_TX_BUSY; + } + + /* Start with the head skbuf */ + dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), + DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_free; + + wr_idx = tx_ring->wr_p % tx_ring->cnt; + + /* Stash the soft descriptor of the head then initialize it */ + txbuf = &tx_ring->txbufs[wr_idx]; + txbuf->skb = skb; + txbuf->dma_addr = dma_addr; + txbuf->fidx = -1; + txbuf->pkt_cnt = 1; + txbuf->real_len = skb->len; + + /* Build TX descriptor */ + txd = &tx_ring->txds[wr_idx]; + txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; + txd->dma_len = cpu_to_le16(skb_headlen(skb)); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->data_len = cpu_to_le16(skb->len); + + txd->flags = 0; + txd->mss = 0; + txd->l4_offset = 0; + + nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); + + nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); + + if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { + txd->flags |= PCIE_DESC_TX_VLAN; + txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + } + + /* Gather DMA */ + if (nr_frags > 0) { + /* all descs must match except for in addr, length and eop */ + txdg = *txd; + + for (f = 0; f < nr_frags; f++) { + frag = &skb_shinfo(skb)->frags[f]; + fsize = skb_frag_size(frag); + + dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, + fsize, DMA_TO_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, dma_addr)) + goto err_unmap; + + wr_idx = (wr_idx + 1) % tx_ring->cnt; + tx_ring->txbufs[wr_idx].skb = skb; + tx_ring->txbufs[wr_idx].dma_addr = dma_addr; + tx_ring->txbufs[wr_idx].fidx = f; + + txd = &tx_ring->txds[wr_idx]; + *txd = txdg; + txd->dma_len = cpu_to_le16(fsize); + nfp_desc_set_dma_addr(txd, dma_addr); + txd->offset_eop = + (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; + } + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_gather++; + u64_stats_update_end(&r_vec->tx_sync); + } + + netdev_tx_sent_queue(nd_q, txbuf->real_len); + + tx_ring->wr_p += nr_frags + 1; + if (nfp_net_tx_ring_should_stop(tx_ring)) + nfp_net_tx_ring_stop(nd_q, tx_ring); + + tx_ring->wr_ptr_add += nr_frags + 1; + if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { + /* force memory write before we let HW know */ + wmb(); + nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); + tx_ring->wr_ptr_add = 0; + } + + skb_tx_timestamp(skb); + + return NETDEV_TX_OK; + +err_unmap: + --f; + while (f >= 0) { + frag = &skb_shinfo(skb)->frags[f]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[wr_idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; + wr_idx = wr_idx - 1; + if (wr_idx < 0) + wr_idx += tx_ring->cnt; + } + dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + tx_ring->txbufs[wr_idx].skb = NULL; + tx_ring->txbufs[wr_idx].dma_addr = 0; + tx_ring->txbufs[wr_idx].fidx = -2; +err_free: + nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_errors++; + u64_stats_update_end(&r_vec->tx_sync); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +/** + * nfp_net_tx_complete() - Handled completed TX packets + * @tx_ring: TX ring structure + * + * Return: Number of completed TX descriptors + */ +static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + u32 done_pkts = 0, done_bytes = 0; + struct sk_buff *skb; + int todo, nr_frags; + u32 qcp_rd_p; + int fidx; + int idx; + + /* Work out how many descriptors have been transmitted */ + qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + + if (qcp_rd_p == tx_ring->qcp_rd_p) + return; + + if (qcp_rd_p > tx_ring->qcp_rd_p) + todo = qcp_rd_p - tx_ring->qcp_rd_p; + else + todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; + + while (todo--) { + idx = tx_ring->rd_p % tx_ring->cnt; + tx_ring->rd_p++; + + skb = tx_ring->txbufs[idx].skb; + if (!skb) + continue; + + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), DMA_TO_DEVICE); + + done_pkts += tx_ring->txbufs[idx].pkt_cnt; + done_bytes += tx_ring->txbufs[idx].real_len; + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&nn->pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + tx_ring->qcp_rd_p = qcp_rd_p; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_bytes += done_bytes; + r_vec->tx_pkts += done_pkts; + u64_stats_update_end(&r_vec->tx_sync); + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); + if (nfp_net_tx_ring_should_wake(tx_ring)) { + /* Make sure TX thread will see updated tx_ring->rd_p */ + smp_mb(); + + if (unlikely(netif_tx_queue_stopped(nd_q))) + netif_tx_wake_queue(nd_q); + } + + WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, + "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", + tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); +} + +/** + * nfp_net_tx_flush() - Free any untransmitted buffers currently on the TX ring + * @tx_ring: TX ring structure + * + * Assumes that the device is stopped + */ +static void nfp_net_tx_flush(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + const struct skb_frag_struct *frag; + struct netdev_queue *nd_q; + struct sk_buff *skb; + int nr_frags; + int fidx; + int idx; + + while (tx_ring->rd_p != tx_ring->wr_p) { + idx = tx_ring->rd_p % tx_ring->cnt; + + skb = tx_ring->txbufs[idx].skb; + if (skb) { + nr_frags = skb_shinfo(skb)->nr_frags; + fidx = tx_ring->txbufs[idx].fidx; + + if (fidx == -1) { + /* unmap head */ + dma_unmap_single(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_headlen(skb), + DMA_TO_DEVICE); + } else { + /* unmap fragment */ + frag = &skb_shinfo(skb)->frags[fidx]; + dma_unmap_page(&pdev->dev, + tx_ring->txbufs[idx].dma_addr, + skb_frag_size(frag), + DMA_TO_DEVICE); + } + + /* check for last gather fragment */ + if (fidx == nr_frags - 1) + dev_kfree_skb_any(skb); + + tx_ring->txbufs[idx].dma_addr = 0; + tx_ring->txbufs[idx].skb = NULL; + tx_ring->txbufs[idx].fidx = -2; + } + + memset(&tx_ring->txds[idx], 0, sizeof(tx_ring->txds[idx])); + + tx_ring->qcp_rd_p++; + tx_ring->rd_p++; + } + + nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + netdev_tx_reset_queue(nd_q); +} + +static void nfp_net_tx_timeout(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + for (i = 0; i < nn->num_tx_rings; i++) { + if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) + continue; + nn_warn(nn, "TX timeout on ring: %d\n", i); + } + nn_warn(nn, "TX watchdog timeout\n"); +} + +/* Receive processing + */ + +/** + * nfp_net_rx_space() - return the number of free slots on the RX ring + * @rx_ring: RX ring structure + * + * Make sure we leave at least one slot free. + * + * Return: True if there is space on the RX ring + */ +static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring) +{ + return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p); +} + +/** + * nfp_net_rx_alloc_one() - Allocate and map skb for RX + * @rx_ring: RX ring structure of the skb + * @dma_addr: Pointer to storage for DMA address (output param) + * + * This function will allcate a new skb, map it for DMA. + * + * Return: allocated skb or NULL on failure. + */ +static struct sk_buff * +nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct sk_buff *skb; + + skb = netdev_alloc_skb(nn->netdev, nn->fl_bufsz); + if (!skb) { + nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); + return NULL; + } + + *dma_addr = dma_map_single(&nn->pdev->dev, skb->data, + nn->fl_bufsz, DMA_FROM_DEVICE); + if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { + dev_kfree_skb_any(skb); + nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); + return NULL; + } + + return skb; +} + +/** + * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings + * @rx_ring: RX ring structure + * @skb: Skb to put on rings + * @dma_addr: DMA address of skb mapping + */ +static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring, + struct sk_buff *skb, dma_addr_t dma_addr) +{ + unsigned int wr_idx; + + wr_idx = rx_ring->wr_p % rx_ring->cnt; + + /* Stash SKB and DMA address away */ + rx_ring->rxbufs[wr_idx].skb = skb; + rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; + + /* Fill freelist descriptor */ + rx_ring->rxds[wr_idx].fld.reserved = 0; + rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; + nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr); + + rx_ring->wr_p++; + rx_ring->wr_ptr_add++; + if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) { + /* Update write pointer of the freelist queue. Make + * sure all writes are flushed before telling the hardware. + */ + wmb(); + nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add); + rx_ring->wr_ptr_add = 0; + } +} + +/** + * nfp_net_rx_flush() - Free any buffers currently on the RX ring + * @rx_ring: RX ring to remove buffers from + * + * Assumes that the device is stopped + */ +static void nfp_net_rx_flush(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net *nn = rx_ring->r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int idx; + + while (rx_ring->rd_p != rx_ring->wr_p) { + idx = rx_ring->rd_p % rx_ring->cnt; + + if (rx_ring->rxbufs[idx].skb) { + dma_unmap_single(&pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_ring->rxbufs[idx].skb); + rx_ring->rxbufs[idx].dma_addr = 0; + rx_ring->rxbufs[idx].skb = NULL; + } + + memset(&rx_ring->rxds[idx], 0, sizeof(rx_ring->rxds[idx])); + + rx_ring->rd_p++; + } +} + +/** + * nfp_net_rx_fill_freelist() - Attempt filling freelist with RX buffers + * @rx_ring: RX ring to fill + * + * Try to fill as many buffers as possible into freelist. Return + * number of buffers added. + * + * Return: Number of freelist buffers added. + */ +static int nfp_net_rx_fill_freelist(struct nfp_net_rx_ring *rx_ring) +{ + struct sk_buff *skb; + dma_addr_t dma_addr; + + while (nfp_net_rx_space(rx_ring)) { + skb = nfp_net_rx_alloc_one(rx_ring, &dma_addr); + if (!skb) { + nfp_net_rx_flush(rx_ring); + return -ENOMEM; + } + nfp_net_rx_give_one(rx_ring, skb, dma_addr); + } + + return 0; +} + +/** + * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors + * @flags: RX descriptor flags field in CPU byte order + */ +static int nfp_net_rx_csum_has_errors(u16 flags) +{ + u16 csum_all_checked, csum_all_ok; + + csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; + csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; + + return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); +} + +/** + * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags + * @nn: NFP Net device + * @r_vec: per-ring structure + * @rxd: Pointer to RX descriptor + * @skb: Pointer to SKB + */ +static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct nfp_net_rx_desc *rxd, struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + if (!(nn->netdev->features & NETIF_F_RXCSUM)) + return; + + if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_error++; + u64_stats_update_end(&r_vec->rx_sync); + return; + } + + /* Assume that the firmware will never report inner CSUM_OK unless outer + * L4 headers were successfully parsed. FW will always report zero UDP + * checksum as CSUM_OK. + */ + if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } + + if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || + rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { + __skb_incr_checksum_unnecessary(skb); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->hw_csum_rx_inner_ok++; + u64_stats_update_end(&r_vec->rx_sync); + } +} + +/** + * nfp_net_set_hash() - Set SKB hash data + * @netdev: adapter's net_device structure + * @skb: SKB to set the hash data on + * @rxd: RX descriptor + * + * The RSS hash and hash-type are pre-pended to the packet data. + * Extract and decode it and set the skb fields. + */ +static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, + struct nfp_net_rx_desc *rxd) +{ + struct nfp_net_rx_hash *rx_hash; + + if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS) || + !(netdev->features & NETIF_F_RXHASH)) + return; + + rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); + + switch (be32_to_cpu(rx_hash->hash_type)) { + case NFP_NET_RSS_IPV4: + case NFP_NET_RSS_IPV6: + case NFP_NET_RSS_IPV6_EX: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3); + break; + default: + skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4); + break; + } +} + +/** + * nfp_net_rx() - receive up to @budget packets on @rx_ring + * @rx_ring: RX ring to receive from + * @budget: NAPI budget + * + * Note, this function is separated out from the napi poll function to + * more cleanly separate packet receive code from other bookkeeping + * functions performed in the napi poll function. + * + * There are differences between the NFP-3200 firmware and the + * NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue + * to indicate that new packets have arrived. The NFP-6000 does not + * have this queue and uses the DD bit in the RX descriptor. This + * method cannot be used on the NFP-3200 as it causes a race + * condition: The RX ring write pointer on the NFP-3200 is updated + * after packets (and descriptors) have been DMAed. If the DD bit is + * used and subsequently the read pointer is updated this may lead to + * the RX queue to underflow (if the firmware has not yet update the + * write pointer). Therefore we use slightly ugly conditional code + * below to handle the differences. We may, in the future update the + * NFP-3200 firmware to behave the same as the firmware on the + * NFP-6000. + * + * Return: Number of packets received. + */ +static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + unsigned int data_len, meta_len; + int avail = 0, pkts_polled = 0; + struct sk_buff *skb, *new_skb; + struct nfp_net_rx_desc *rxd; + dma_addr_t new_dma_addr; + u32 qcp_wr_p; + int idx; + + if (nn->is_nfp3200) { + /* Work out how many packets arrived */ + qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + idx = rx_ring->rd_p % rx_ring->cnt; + + if (qcp_wr_p == idx) + /* No new packets */ + return 0; + + if (qcp_wr_p > idx) + avail = qcp_wr_p - idx; + else + avail = qcp_wr_p + rx_ring->cnt - idx; + } else { + avail = budget + 1; + } + + while (avail > 0 && pkts_polled < budget) { + idx = rx_ring->rd_p % rx_ring->cnt; + + rxd = &rx_ring->rxds[idx]; + if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) { + if (nn->is_nfp3200) + nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n", + rx_ring->idx, idx, + rxd->vals[0], rxd->vals[1]); + break; + } + /* Memory barrier to ensure that we won't do other reads + * before the DD bit. + */ + dma_rmb(); + + rx_ring->rd_p++; + pkts_polled++; + avail--; + + skb = rx_ring->rxbufs[idx].skb; + + new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr); + if (!new_skb) { + nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[idx].skb, + rx_ring->rxbufs[idx].dma_addr); + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_drops++; + u64_stats_update_end(&r_vec->rx_sync); + continue; + } + + dma_unmap_single(&nn->pdev->dev, + rx_ring->rxbufs[idx].dma_addr, + nn->fl_bufsz, DMA_FROM_DEVICE); + + nfp_net_rx_give_one(rx_ring, new_skb, new_dma_addr); + + meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; + data_len = le16_to_cpu(rxd->rxd.data_len); + + if (WARN_ON_ONCE(data_len > nn->fl_bufsz)) { + dev_kfree_skb_any(skb); + continue; + } + + if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) { + /* The packet data starts after the metadata */ + skb_reserve(skb, meta_len); + } else { + /* The packet data starts at a fixed offset */ + skb_reserve(skb, nn->rx_offset); + } + + /* Adjust the SKB for the dynamic meta data pre-pended */ + skb_put(skb, data_len - meta_len); + + nfp_net_set_hash(nn->netdev, skb, rxd); + + /* Pad small frames to minimum */ + if (skb_put_padto(skb, 60)) + break; + + /* Stats update */ + u64_stats_update_begin(&r_vec->rx_sync); + r_vec->rx_pkts++; + r_vec->rx_bytes += skb->len; + u64_stats_update_end(&r_vec->rx_sync); + + skb_record_rx_queue(skb, rx_ring->idx); + skb->protocol = eth_type_trans(skb, nn->netdev); + + nfp_net_rx_csum(nn, r_vec, rxd, skb); + + if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + le16_to_cpu(rxd->rxd.vlan)); + + napi_gro_receive(&rx_ring->r_vec->napi, skb); + } + + if (nn->is_nfp3200) + nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled); + + return pkts_polled; +} + +/** + * nfp_net_poll() - napi poll function + * @napi: NAPI structure + * @budget: NAPI budget + * + * Return: number of packets polled. + */ +static int nfp_net_poll(struct napi_struct *napi, int budget) +{ + struct nfp_net_r_vector *r_vec = + container_of(napi, struct nfp_net_r_vector, napi); + struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; + struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring; + struct nfp_net *nn = r_vec->nfp_net; + struct netdev_queue *txq; + unsigned int pkts_polled; + + tx_ring = &nn->tx_rings[rx_ring->idx]; + txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx); + nfp_net_tx_complete(tx_ring); + + pkts_polled = nfp_net_rx(rx_ring, budget); + + if (pkts_polled < budget) { + napi_complete_done(napi, pkts_polled); + nfp_net_irq_unmask(nn, r_vec->irq_idx); + } + + return pkts_polled; +} + +/* Setup and Configuration + */ + +/** + * nfp_net_tx_ring_free() - Free resources allocated to a TX ring + * @tx_ring: TX ring to free + */ +static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), 0); + + kfree(tx_ring->txbufs); + + if (tx_ring->txds) + dma_free_coherent(&pdev->dev, tx_ring->size, + tx_ring->txds, tx_ring->dma); + + tx_ring->cnt = 0; + tx_ring->wr_p = 0; + tx_ring->rd_p = 0; + tx_ring->qcp_rd_p = 0; + + tx_ring->txbufs = NULL; + tx_ring->txds = NULL; + tx_ring->dma = 0; + tx_ring->size = 0; +} + +/** + * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring + * @tx_ring: TX Ring structure to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring) +{ + struct nfp_net_r_vector *r_vec = tx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + tx_ring->cnt = nn->txd_cnt; + + tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; + tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->txds) + goto err_alloc; + + sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; + tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); + if (!tx_ring->txbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), tx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), ilog2(tx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), r_vec->irq_idx); + + netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); + + nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", + tx_ring->idx, tx_ring->qcidx, + tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); + + return 0; + +err_alloc: + nfp_net_tx_ring_free(tx_ring); + return -ENOMEM; +} + +/** + * nfp_net_rx_ring_free() - Free resources allocated to a RX ring + * @rx_ring: RX ring to free + */ +static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), 0); + + kfree(rx_ring->rxbufs); + + if (rx_ring->rxds) + dma_free_coherent(&pdev->dev, rx_ring->size, + rx_ring->rxds, rx_ring->dma); + + rx_ring->cnt = 0; + rx_ring->wr_p = 0; + rx_ring->rd_p = 0; + + rx_ring->rxbufs = NULL; + rx_ring->rxds = NULL; + rx_ring->dma = 0; + rx_ring->size = 0; +} + +/** + * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring + * @rx_ring: RX ring to allocate + * + * Return: 0 on success, negative errno otherwise. + */ +static int nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring) +{ + struct nfp_net_r_vector *r_vec = rx_ring->r_vec; + struct nfp_net *nn = r_vec->nfp_net; + struct pci_dev *pdev = nn->pdev; + int sz; + + rx_ring->cnt = nn->rxd_cnt; + + rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; + rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->rxds) + goto err_alloc; + + sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; + rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); + if (!rx_ring->rxbufs) + goto err_alloc; + + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), rx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), ilog2(rx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), r_vec->irq_idx); + + nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", + rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, + rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); + + return 0; + +err_alloc: + nfp_net_rx_ring_free(rx_ring); + return -ENOMEM; +} + +static void __nfp_net_free_rings(struct nfp_net *nn, unsigned int n_free) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + + while (n_free--) { + r_vec = &nn->r_vecs[n_free]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + nfp_net_rx_ring_free(r_vec->rx_ring); + nfp_net_tx_ring_free(r_vec->tx_ring); + + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); + + netif_napi_del(&r_vec->napi); + } +} + +/** + * nfp_net_free_rings() - Free all ring resources + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_free_rings(struct nfp_net *nn) +{ + __nfp_net_free_rings(nn, nn->num_r_vecs); +} + +/** + * nfp_net_alloc_rings() - Allocate resources for RX and TX rings + * @nn: NFP Net device to reconfigure + * + * Return: 0 on success or negative errno on error. + */ +static int nfp_net_alloc_rings(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + struct msix_entry *entry; + int err; + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + entry = &nn->irq_entries[r_vec->irq_idx]; + + /* Setup NAPI */ + netif_napi_add(nn->netdev, &r_vec->napi, + nfp_net_poll, NAPI_POLL_WEIGHT); + + snprintf(r_vec->name, sizeof(r_vec->name), + "%s-rxtx-%d", nn->netdev->name, r); + err = request_irq(entry->vector, r_vec->handler, 0, + r_vec->name, r_vec); + if (err) { + nn_dbg(nn, "Error requesting IRQ %d\n", entry->vector); + goto err_napi_del; + } + + irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); + + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", + r, entry->vector, entry->entry); + + /* Allocate TX ring resources */ + err = nfp_net_tx_ring_alloc(r_vec->tx_ring); + if (err) + goto err_free_irq; + + /* Allocate RX ring resources */ + err = nfp_net_rx_ring_alloc(r_vec->rx_ring); + if (err) + goto err_free_tx; + } + + return 0; + +err_free_tx: + nfp_net_tx_ring_free(r_vec->tx_ring); +err_free_irq: + irq_set_affinity_hint(entry->vector, NULL); + free_irq(entry->vector, r_vec); +err_napi_del: + netif_napi_del(&r_vec->napi); + __nfp_net_free_rings(nn, r); + return err; +} + +/** + * nfp_net_rss_write_itbl() - Write RSS indirection table to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_itbl(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, + get_unaligned_le32(nn->rss_itbl + i)); +} + +/** + * nfp_net_rss_write_key() - Write RSS hash key to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_key(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, + get_unaligned_le32(nn->rss_key + i)); +} + +/** + * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW + * @nn: NFP Net device to reconfigure + */ +void nfp_net_coalesce_write_cfg(struct nfp_net *nn) +{ + u8 i; + u32 factor; + u32 value; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* copy RX interrupt coalesce parameters */ + value = (nn->rx_coalesce_max_frames << 16) | + (factor * nn->rx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); + + /* copy TX interrupt coalesce parameters */ + value = (nn->tx_coalesce_max_frames << 16) | + (factor * nn->tx_coalesce_usecs); + for (i = 0; i < nn->num_r_vecs; i++) + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); +} + +/** + * nfp_net_write_mac_addr() - Write mac address to device registers + * @nn: NFP Net device to reconfigure + * @mac: Six-byte MAC address to be written + * + * We do a bit of byte swapping dance because firmware is LE. + */ +static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) +{ + nn_writel(nn, NFP_NET_CFG_MACADDR + 0, + get_unaligned_be32(nn->netdev->dev_addr)); + /* We can't do writew for NFP-3200 compatibility */ + nn_writel(nn, NFP_NET_CFG_MACADDR + 4, + get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); +} + +/** + * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_clear_config_and_disable(struct nfp_net *nn) +{ + u32 new_ctrl, update; + int err; + + new_ctrl = nn->ctrl; + new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; + update = NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) { + nn_err(nn, "Could not disable device: %d\n", err); + return; + } + + nn->ctrl = new_ctrl; +} + +/** + * nfp_net_start_vec() - Start ring vector + * @nn: NFP Net device structure + * @r_vec: Ring vector to be started + */ +static int nfp_net_start_vec(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) +{ + unsigned int irq_vec; + int err = 0; + + irq_vec = nn->irq_entries[r_vec->irq_idx].vector; + + disable_irq(irq_vec); + + err = nfp_net_rx_fill_freelist(r_vec->rx_ring); + if (err) { + nn_err(nn, "RV%02d: couldn't allocate enough buffers\n", + r_vec->irq_idx); + goto out; + } + + napi_enable(&r_vec->napi); +out: + enable_irq(irq_vec); + + return err; +} + +static int nfp_net_netdev_open(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err, r; + u32 update = 0; + u32 new_ctrl; + + if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { + nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); + return -EBUSY; + } + + new_ctrl = nn->ctrl; + + /* Step 1: Allocate resources for rings and the like + * - Request interrupts + * - Allocate RX and TX ring resources + * - Setup initial RSS table + */ + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", + nn->exn_name, sizeof(nn->exn_name), + NFP_NET_IRQ_EXN_IDX, nn->exn_handler); + if (err) + return err; + + err = nfp_net_alloc_rings(nn); + if (err) + goto err_free_exn; + + err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); + if (err) + goto err_free_rings; + + err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); + if (err) + goto err_free_rings; + + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + nfp_net_rss_write_key(nn); + nfp_net_rss_write_itbl(nn); + nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); + update |= NFP_NET_CFG_UPDATE_RSS; + } + + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_coalesce_write_cfg(nn); + + new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + update |= NFP_NET_CFG_UPDATE_IRQMOD; + } + + /* Step 2: Configure the NFP + * - Enable rings from 0 to tx_rings/rx_rings - 1. + * - Write MAC address (in case it changed) + * - Set the MTU + * - Set the Freelist buffer size + * - Enable the FW + */ + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); + + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? + 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); + + nfp_net_write_mac_addr(nn, netdev->dev_addr); + + nn_writel(nn, NFP_NET_CFG_MTU, netdev->mtu); + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); + + /* Enable device */ + new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; + update |= NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + goto err_clear_config; + + nn->ctrl = new_ctrl; + + /* Since reconfiguration requests while NFP is down are ignored we + * have to wipe the entire VXLAN configuration and reinitialize it. + */ + if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { + memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); + memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); + vxlan_get_rx_port(netdev); + } + + /* Step 3: Enable for kernel + * - put some freelist descriptors on each RX ring + * - enable NAPI on each ring + * - enable all TX queues + * - set link state + */ + for (r = 0; r < nn->num_r_vecs; r++) { + err = nfp_net_start_vec(nn, &nn->r_vecs[r]); + if (err) + goto err_disable_napi; + } + + netif_tx_wake_all_queues(netdev); + + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", + nn->lsc_name, sizeof(nn->lsc_name), + NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); + if (err) + goto err_stop_tx; + nfp_net_read_link_status(nn); + + return 0; + +err_stop_tx: + netif_tx_disable(netdev); + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); +err_disable_napi: + while (r--) { + napi_disable(&nn->r_vecs[r].napi); + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + } +err_clear_config: + nfp_net_clear_config_and_disable(nn); +err_free_rings: + nfp_net_free_rings(nn); +err_free_exn: + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + return err; +} + +/** + * nfp_net_netdev_close() - Called when the device is downed + * @netdev: netdev structure + */ +static int nfp_net_netdev_close(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { + nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); + return 0; + } + + /* Step 1: Disable RX and TX rings from the Linux kernel perspective + */ + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); + netif_carrier_off(netdev); + nn->link_up = false; + + for (r = 0; r < nn->num_r_vecs; r++) + napi_disable(&nn->r_vecs[r].napi); + + netif_tx_disable(netdev); + + /* Step 2: Tell NFP + */ + nfp_net_clear_config_and_disable(nn); + + /* Step 3: Free resources + */ + for (r = 0; r < nn->num_r_vecs; r++) { + nfp_net_rx_flush(nn->r_vecs[r].rx_ring); + nfp_net_tx_flush(nn->r_vecs[r].tx_ring); + } + + nfp_net_free_rings(nn); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + + nn_dbg(nn, "%s down", netdev->name); + return 0; +} + +static void nfp_net_set_rx_mode(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + + new_ctrl = nn->ctrl; + + if (netdev->flags & IFF_PROMISC) { + if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) + new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; + else + nn_warn(nn, "FW does not support promiscuous mode\n"); + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; + } + + if (new_ctrl == nn->ctrl) + return; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + if (nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN)) + return; + + nn->ctrl = new_ctrl; +} + +static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 tmp; + + nn_dbg(nn, "New MTU = %d\n", new_mtu); + + if (new_mtu < 68 || new_mtu > nn->max_mtu) { + nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); + return -EINVAL; + } + + netdev->mtu = new_mtu; + + /* Freelist buffer size rounded up to the nearest 1K */ + tmp = new_mtu + ETH_HLEN + VLAN_HLEN + NFP_NET_MAX_PREPEND; + nn->fl_bufsz = roundup(tmp, 1024); + + /* restart if running */ + if (netif_running(netdev)) { + nfp_net_netdev_close(netdev); + nfp_net_netdev_open(netdev); + } + + return 0; +} + +static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + for (r = 0; r < nn->num_r_vecs; r++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; + u64 data[3]; + unsigned int start; + + do { + start = u64_stats_fetch_begin(&r_vec->rx_sync); + data[0] = r_vec->rx_pkts; + data[1] = r_vec->rx_bytes; + data[2] = r_vec->rx_drops; + } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); + stats->rx_packets += data[0]; + stats->rx_bytes += data[1]; + stats->rx_dropped += data[2]; + + do { + start = u64_stats_fetch_begin(&r_vec->tx_sync); + data[0] = r_vec->tx_pkts; + data[1] = r_vec->tx_bytes; + data[2] = r_vec->tx_errors; + } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); + stats->tx_packets += data[0]; + stats->tx_bytes += data[1]; + stats->tx_errors += data[2]; + } + + return stats; +} + +static int nfp_net_set_features(struct net_device *netdev, + netdev_features_t features) +{ + netdev_features_t changed = netdev->features ^ features; + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + int err; + + /* Assume this is not called with features we have not advertised */ + + new_ctrl = nn->ctrl; + + if (changed & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; + } + + if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { + if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) + new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; + } + + if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { + if (features & (NETIF_F_TSO | NETIF_F_TSO6)) + new_ctrl |= NFP_NET_CFG_CTRL_LSO; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_TX) { + if (features & NETIF_F_HW_VLAN_CTAG_TX) + new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; + } + + if (changed & NETIF_F_SG) { + if (features & NETIF_F_SG) + new_ctrl |= NFP_NET_CFG_CTRL_GATHER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; + } + + nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", + netdev->features, features, changed); + + if (new_ctrl == nn->ctrl) + return 0; + + nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + nn->ctrl = new_ctrl; + + return 0; +} + +static netdev_features_t +nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + u8 l4_hdr; + + /* We can't do TSO over double tagged packets (802.1AD) */ + features &= vlan_features_check(skb, features); + + if (!skb->encapsulation) + return features; + + /* Ensure that inner L4 header offset fits into TX descriptor field */ + if (skb_is_gso(skb)) { + u32 hdrlen; + + hdrlen = skb_inner_transport_header(skb) - skb->data + + inner_tcp_hdrlen(skb); + + if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) + features &= ~NETIF_F_GSO_MASK; + } + + /* VXLAN/GRE check */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + } + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || + (l4_hdr == IPPROTO_UDP && + (skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + + return features; +} + +/** + * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW + * @nn: NFP Net device to reconfigure + * @idx: Index into the port table where new port should be written + * @port: UDP port to configure (pass zero to remove VXLAN port) + */ +static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) +{ + int i; + + nn->vxlan_ports[idx] = port; + + if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) + return; + + BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) + nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), + be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | + be16_to_cpu(nn->vxlan_ports[i])); + + nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); +} + +/** + * nfp_net_find_vxlan_idx() - find table entry of the port or a free one + * @nn: NFP Network structure + * @port: UDP port to look for + * + * Return: if the port is already in the table -- it's position; + * if the port is not in the table -- free position to use; + * if the table is full -- -ENOSPC. + */ +static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) +{ + int i, free_idx = -ENOSPC; + + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { + if (nn->vxlan_ports[i] == port) + return i; + if (!nn->vxlan_usecnt[i]) + free_idx = i; + } + + return free_idx; +} + +static void nfp_net_add_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (idx == -ENOSPC) + return; + + if (!nn->vxlan_usecnt[idx]++) + nfp_net_set_vxlan_port(nn, idx, port); +} + +static void nfp_net_del_vxlan_port(struct net_device *netdev, + sa_family_t sa_family, __be16 port) +{ + struct nfp_net *nn = netdev_priv(netdev); + int idx; + + idx = nfp_net_find_vxlan_idx(nn, port); + if (!nn->vxlan_usecnt[idx] || idx == -ENOSPC) + return; + + if (!--nn->vxlan_usecnt[idx]) + nfp_net_set_vxlan_port(nn, idx, 0); +} + +static const struct net_device_ops nfp_net_netdev_ops = { + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_features = nfp_net_set_features, + .ndo_features_check = nfp_net_features_check, + .ndo_add_vxlan_port = nfp_net_add_vxlan_port, + .ndo_del_vxlan_port = nfp_net_del_vxlan_port, +}; + +/** + * nfp_net_info() - Print general info about the NIC + * @nn: NFP Net device to reconfigure + */ +void nfp_net_info(struct nfp_net *nn) +{ + nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx", + nn->is_vf ? "VF " : "", + nn->num_tx_rings, nn->max_tx_rings, + nn->num_rx_rings, nn->max_rx_rings); + nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor, + nn->max_mtu); + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn->cap, + nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", + nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", + nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", + nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", + nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", + nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : ""); +} + +/** + * nfp_net_netdev_alloc() - Allocate netdev and related structure + * @pdev: PCI device + * @max_tx_rings: Maximum number of TX rings supported by device + * @max_rx_rings: Maximum number of RX rings supported by device + * + * This function allocates a netdev device and fills in the initial + * part of the @struct nfp_net structure. + * + * Return: NFP Net device structure, or ERR_PTR on error. + */ +struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, + int max_tx_rings, int max_rx_rings) +{ + struct net_device *netdev; + struct nfp_net *nn; + int nqs; + + netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), + max_tx_rings, max_rx_rings); + if (!netdev) + return ERR_PTR(-ENOMEM); + + SET_NETDEV_DEV(netdev, &pdev->dev); + nn = netdev_priv(netdev); + + nn->netdev = netdev; + nn->pdev = pdev; + + nn->max_tx_rings = max_tx_rings; + nn->max_rx_rings = max_rx_rings; + + nqs = netif_get_num_default_rss_queues(); + nn->num_tx_rings = min_t(int, nqs, max_tx_rings); + nn->num_rx_rings = min_t(int, nqs, max_rx_rings); + + nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; + nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; + + spin_lock_init(&nn->reconfig_lock); + spin_lock_init(&nn->link_status_lock); + + return nn; +} + +/** + * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did + * @nn: NFP Net device to reconfigure + */ +void nfp_net_netdev_free(struct nfp_net *nn) +{ + free_netdev(nn->netdev); +} + +/** + * nfp_net_rss_init() - Set the initial RSS parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_rss_init(struct nfp_net *nn) +{ + int i; + + netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + + for (i = 0; i < sizeof(nn->rss_itbl); i++) + nn->rss_itbl[i] = + ethtool_rxfh_indir_default(i, nn->num_rx_rings); + + /* Enable IPv4/IPv6 TCP by default */ + nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | + NFP_NET_CFG_RSS_IPV6_TCP | + NFP_NET_CFG_RSS_TOEPLITZ | + NFP_NET_CFG_RSS_MASK; +} + +/** + * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_irqmod_init(struct nfp_net *nn) +{ + nn->rx_coalesce_usecs = 50; + nn->rx_coalesce_max_frames = 64; + nn->tx_coalesce_usecs = 50; + nn->tx_coalesce_max_frames = 64; +} + +/** + * nfp_net_netdev_init() - Initialise/finalise the netdev structure + * @netdev: netdev structure + * + * Return: 0 on success or negative errno on error. + */ +int nfp_net_netdev_init(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Get some of the read-only fields from the BAR */ + nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); + nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); + + nfp_net_write_mac_addr(nn, nn->netdev->dev_addr); + + /* Set default MTU and Freelist buffer size */ + if (nn->max_mtu < NFP_NET_DEFAULT_MTU) + netdev->mtu = nn->max_mtu; + else + netdev->mtu = NFP_NET_DEFAULT_MTU; + nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ; + + /* Advertise/enable offloads based on capabilities + * + * Note: netdev->features show the currently enabled features + * and netdev->hw_features advertises which features are + * supported. By default we enable most features. + */ + netdev->hw_features = NETIF_F_HIGHDMA; + if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { + netdev->hw_features |= NETIF_F_RXCSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { + netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; + } + if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { + netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + nn->ctrl |= NFP_NET_CFG_CTRL_LSO; + } + if (nn->cap & NFP_NET_CFG_CTRL_RSS) { + netdev->hw_features |= NETIF_F_RXHASH; + nfp_net_rss_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_RSS; + } + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && + nn->cap & NFP_NET_CFG_CTRL_NVGRE) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL; + nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; + + netdev->hw_enc_features = netdev->hw_features; + } + + netdev->vlan_features = netdev->hw_features; + + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; + nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + } + + netdev->features = netdev->hw_features; + + /* Advertise but disable TSO by default. */ + netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); + + /* Allow L2 Broadcast and Multicast through by default, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_L2BC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; + if (nn->cap & NFP_NET_CFG_CTRL_L2MC) + nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; + + /* Allow IRQ moderation, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_irqmod_init(nn); + nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + } + + /* On NFP-3200 enable MSI-X auto-masking, if supported and the + * interrupts are not shared. + */ + if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO) + nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO; + + /* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */ + if (nn->fw_ver.major >= 2) + nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); + else + nn->rx_offset = NFP_NET_RX_OFFSET; + + /* Stash the re-configuration queue away. First odd queue in TX Bar */ + nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; + + /* Make sure the FW knows the netdev is supposed to be disabled here */ + nn_writel(nn, NFP_NET_CFG_CTRL, 0); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | + NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + /* Finalise the netdev setup */ + ether_setup(netdev); + netdev->netdev_ops = &nfp_net_netdev_ops; + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + nfp_net_set_ethtool_ops(netdev); + nfp_net_irqs_assign(netdev); + + return register_netdev(netdev); +} + +/** + * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. + * @netdev: netdev structure + */ +void nfp_net_netdev_clean(struct net_device *netdev) +{ + unregister_netdev(netdev); +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h new file mode 100644 index 000000000000..8692003aeed8 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -0,0 +1,323 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ctrl.h + * Netronome network device driver: Control BAR layout + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#ifndef _NFP_NET_CTRL_H_ +#define _NFP_NET_CTRL_H_ + +/* IMPORTANT: This header file is shared with the FW, + * no OS specific constructs, please! + */ + +/** + * Configuration BAR size. + * + * The configuration BAR is 8K in size, but on the NFP6000, due to + * THB-350, 32k needs to be reserved. + */ +#define NFP_NET_CFG_BAR_SZ (32 * 1024) + +/** + * Offset in Freelist buffer where packet starts on RX + */ +#define NFP_NET_RX_OFFSET 32 + +/** + * Maximum header size supported for LSO frames + */ +#define NFP_NET_LSO_MAX_HDR_SZ 255 + +/** + * Hash type pre-pended when a RSS hash was computed + */ +#define NFP_NET_RSS_NONE 0 +#define NFP_NET_RSS_IPV4 1 +#define NFP_NET_RSS_IPV6 2 +#define NFP_NET_RSS_IPV6_EX 3 +#define NFP_NET_RSS_IPV4_TCP 4 +#define NFP_NET_RSS_IPV6_TCP 5 +#define NFP_NET_RSS_IPV6_EX_TCP 6 +#define NFP_NET_RSS_IPV4_UDP 7 +#define NFP_NET_RSS_IPV6_UDP 8 +#define NFP_NET_RSS_IPV6_EX_UDP 9 + +/** + * @NFP_NET_TXR_MAX: Maximum number of TX rings + * @NFP_NET_TXR_MASK: Mask for TX rings + * @NFP_NET_RXR_MAX: Maximum number of RX rings + * @NFP_NET_RXR_MASK: Mask for RX rings + */ +#define NFP_NET_TXR_MAX 64 +#define NFP_NET_TXR_MASK (NFP_NET_TXR_MAX - 1) +#define NFP_NET_RXR_MAX 64 +#define NFP_NET_RXR_MASK (NFP_NET_RXR_MAX - 1) + +/** + * Read/Write config words (0x0000 - 0x002c) + * @NFP_NET_CFG_CTRL: Global control + * @NFP_NET_CFG_UPDATE: Indicate which fields are updated + * @NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings + * @NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings + * @NFP_NET_CFG_MTU: Set MTU size + * @NFP_NET_CFG_FLBUFSZ: Set freelist buffer size (must be larger than MTU) + * @NFP_NET_CFG_EXN: MSI-X table entry for exceptions + * @NFP_NET_CFG_LSC: MSI-X table entry for link state changes + * @NFP_NET_CFG_MACADDR: MAC address + * + * TODO: + * - define Error details in UPDATE + */ +#define NFP_NET_CFG_CTRL 0x0000 +#define NFP_NET_CFG_CTRL_ENABLE (0x1 << 0) /* Global enable */ +#define NFP_NET_CFG_CTRL_PROMISC (0x1 << 1) /* Enable Promisc mode */ +#define NFP_NET_CFG_CTRL_L2BC (0x1 << 2) /* Allow L2 Broadcast */ +#define NFP_NET_CFG_CTRL_L2MC (0x1 << 3) /* Allow L2 Multicast */ +#define NFP_NET_CFG_CTRL_RXCSUM (0x1 << 4) /* Enable RX Checksum */ +#define NFP_NET_CFG_CTRL_TXCSUM (0x1 << 5) /* Enable TX Checksum */ +#define NFP_NET_CFG_CTRL_RXVLAN (0x1 << 6) /* Enable VLAN strip */ +#define NFP_NET_CFG_CTRL_TXVLAN (0x1 << 7) /* Enable VLAN insert */ +#define NFP_NET_CFG_CTRL_SCATTER (0x1 << 8) /* Scatter DMA */ +#define NFP_NET_CFG_CTRL_GATHER (0x1 << 9) /* Gather DMA */ +#define NFP_NET_CFG_CTRL_LSO (0x1 << 10) /* LSO/TSO */ +#define NFP_NET_CFG_CTRL_RINGCFG (0x1 << 16) /* Ring runtime changes */ +#define NFP_NET_CFG_CTRL_RSS (0x1 << 17) /* RSS */ +#define NFP_NET_CFG_CTRL_IRQMOD (0x1 << 18) /* Interrupt moderation */ +#define NFP_NET_CFG_CTRL_RINGPRIO (0x1 << 19) /* Ring priorities */ +#define NFP_NET_CFG_CTRL_MSIXAUTO (0x1 << 20) /* MSI-X auto-masking */ +#define NFP_NET_CFG_CTRL_TXRWB (0x1 << 21) /* Write-back of TX ring*/ +#define NFP_NET_CFG_CTRL_L2SWITCH (0x1 << 22) /* L2 Switch */ +#define NFP_NET_CFG_CTRL_L2SWITCH_LOCAL (0x1 << 23) /* Switch to local */ +#define NFP_NET_CFG_CTRL_VXLAN (0x1 << 24) /* VXLAN tunnel support */ +#define NFP_NET_CFG_CTRL_NVGRE (0x1 << 25) /* NVGRE tunnel support */ +#define NFP_NET_CFG_UPDATE 0x0004 +#define NFP_NET_CFG_UPDATE_GEN (0x1 << 0) /* General update */ +#define NFP_NET_CFG_UPDATE_RING (0x1 << 1) /* Ring config change */ +#define NFP_NET_CFG_UPDATE_RSS (0x1 << 2) /* RSS config change */ +#define NFP_NET_CFG_UPDATE_TXRPRIO (0x1 << 3) /* TX Ring prio change */ +#define NFP_NET_CFG_UPDATE_RXRPRIO (0x1 << 4) /* RX Ring prio change */ +#define NFP_NET_CFG_UPDATE_MSIX (0x1 << 5) /* MSI-X change */ +#define NFP_NET_CFG_UPDATE_L2SWITCH (0x1 << 6) /* Switch changes */ +#define NFP_NET_CFG_UPDATE_RESET (0x1 << 7) /* Update due to FLR */ +#define NFP_NET_CFG_UPDATE_IRQMOD (0x1 << 8) /* IRQ mod change */ +#define NFP_NET_CFG_UPDATE_VXLAN (0x1 << 9) /* VXLAN port change */ +#define NFP_NET_CFG_UPDATE_ERR (0x1 << 31) /* A error occurred */ +#define NFP_NET_CFG_TXRS_ENABLE 0x0008 +#define NFP_NET_CFG_RXRS_ENABLE 0x0010 +#define NFP_NET_CFG_MTU 0x0018 +#define NFP_NET_CFG_FLBUFSZ 0x001c +#define NFP_NET_CFG_EXN 0x001f +#define NFP_NET_CFG_LSC 0x0020 +#define NFP_NET_CFG_MACADDR 0x0024 + +/** + * Read-only words (0x0030 - 0x0050): + * @NFP_NET_CFG_VERSION: Firmware version number + * @NFP_NET_CFG_STS: Status + * @NFP_NET_CFG_CAP: Capabilities (same bits as @NFP_NET_CFG_CTRL) + * @NFP_NET_MAX_TXRINGS: Maximum number of TX rings + * @NFP_NET_MAX_RXRINGS: Maximum number of RX rings + * @NFP_NET_MAX_MTU: Maximum support MTU + * @NFP_NET_CFG_START_TXQ: Start Queue Control Queue to use for TX (PF only) + * @NFP_NET_CFG_START_RXQ: Start Queue Control Queue to use for RX (PF only) + * + * TODO: + * - define more STS bits + */ +#define NFP_NET_CFG_VERSION 0x0030 +#define NFP_NET_CFG_VERSION_RESERVED_MASK (0xff << 24) +#define NFP_NET_CFG_VERSION_CLASS_MASK (0xff << 16) +#define NFP_NET_CFG_VERSION_CLASS(x) (((x) & 0xff) << 16) +#define NFP_NET_CFG_VERSION_CLASS_GENERIC 0 +#define NFP_NET_CFG_VERSION_MAJOR_MASK (0xff << 8) +#define NFP_NET_CFG_VERSION_MAJOR(x) (((x) & 0xff) << 8) +#define NFP_NET_CFG_VERSION_MINOR_MASK (0xff << 0) +#define NFP_NET_CFG_VERSION_MINOR(x) (((x) & 0xff) << 0) +#define NFP_NET_CFG_STS 0x0034 +#define NFP_NET_CFG_STS_LINK (0x1 << 0) /* Link up or down */ +#define NFP_NET_CFG_CAP 0x0038 +#define NFP_NET_CFG_MAX_TXRINGS 0x003c +#define NFP_NET_CFG_MAX_RXRINGS 0x0040 +#define NFP_NET_CFG_MAX_MTU 0x0044 +/* Next two words are being used by VFs for solving THB350 issue */ +#define NFP_NET_CFG_START_TXQ 0x0048 +#define NFP_NET_CFG_START_RXQ 0x004c + +/** + * NFP-3200 workaround (0x0050 - 0x0058) + * @NFP_NET_CFG_SPARE_ADDR: DMA address for ME code to use (e.g. YDS-155 fix) + */ +#define NFP_NET_CFG_SPARE_ADDR 0x0050 +/** + * NFP6000/NFP4000 - Prepend configuration + */ +#define NFP_NET_CFG_RX_OFFSET 0x0050 +#define NFP_NET_CFG_RX_OFFSET_DYNAMIC 0 /* Prepend mode */ + +/** + * NFP6000/NFP4000 - VXLAN/UDP encap configuration + * @NFP_NET_CFG_VXLAN_PORT: Base address of table of tunnels' UDP dst ports + * @NFP_NET_CFG_VXLAN_SZ: Size of the UDP port table in bytes + */ +#define NFP_NET_CFG_VXLAN_PORT 0x0060 +#define NFP_NET_CFG_VXLAN_SZ 0x0008 + +/** + * 64B reserved for future use (0x0080 - 0x00c0) + */ +#define NFP_NET_CFG_RESERVED 0x0080 +#define NFP_NET_CFG_RESERVED_SZ 0x0040 + +/** + * RSS configuration (0x0100 - 0x01ac): + * Used only when NFP_NET_CFG_CTRL_RSS is enabled + * @NFP_NET_CFG_RSS_CFG: RSS configuration word + * @NFP_NET_CFG_RSS_KEY: RSS "secret" key + * @NFP_NET_CFG_RSS_ITBL: RSS indirection table + */ +#define NFP_NET_CFG_RSS_BASE 0x0100 +#define NFP_NET_CFG_RSS_CTRL NFP_NET_CFG_RSS_BASE +#define NFP_NET_CFG_RSS_MASK (0x7f) +#define NFP_NET_CFG_RSS_MASK_of(_x) ((_x) & 0x7f) +#define NFP_NET_CFG_RSS_IPV4 (1 << 8) /* RSS for IPv4 */ +#define NFP_NET_CFG_RSS_IPV6 (1 << 9) /* RSS for IPv6 */ +#define NFP_NET_CFG_RSS_IPV4_TCP (1 << 10) /* RSS for IPv4/TCP */ +#define NFP_NET_CFG_RSS_IPV4_UDP (1 << 11) /* RSS for IPv4/UDP */ +#define NFP_NET_CFG_RSS_IPV6_TCP (1 << 12) /* RSS for IPv6/TCP */ +#define NFP_NET_CFG_RSS_IPV6_UDP (1 << 13) /* RSS for IPv6/UDP */ +#define NFP_NET_CFG_RSS_TOEPLITZ (1 << 24) /* Use Toeplitz hash */ +#define NFP_NET_CFG_RSS_KEY (NFP_NET_CFG_RSS_BASE + 0x4) +#define NFP_NET_CFG_RSS_KEY_SZ 0x28 +#define NFP_NET_CFG_RSS_ITBL (NFP_NET_CFG_RSS_BASE + 0x4 + \ + NFP_NET_CFG_RSS_KEY_SZ) +#define NFP_NET_CFG_RSS_ITBL_SZ 0x80 + +/** + * TX ring configuration (0x200 - 0x800) + * @NFP_NET_CFG_TXR_BASE: Base offset for TX ring configuration + * @NFP_NET_CFG_TXR_ADDR: Per TX ring DMA address (8B entries) + * @NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries) + * @NFP_NET_CFG_TXR_SZ: Per TX ring ring size (1B entries) + * @NFP_NET_CFG_TXR_VEC: Per TX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_TXR_PRIO: Per TX ring priority (1B entries) + * @NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet + */ +#define NFP_NET_CFG_TXR_BASE 0x0200 +#define NFP_NET_CFG_TXR_ADDR(_x) (NFP_NET_CFG_TXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_WB_ADDR(_x) (NFP_NET_CFG_TXR_BASE + 0x200 + \ + ((_x) * 0x8)) +#define NFP_NET_CFG_TXR_SZ(_x) (NFP_NET_CFG_TXR_BASE + 0x400 + (_x)) +#define NFP_NET_CFG_TXR_VEC(_x) (NFP_NET_CFG_TXR_BASE + 0x440 + (_x)) +#define NFP_NET_CFG_TXR_PRIO(_x) (NFP_NET_CFG_TXR_BASE + 0x480 + (_x)) +#define NFP_NET_CFG_TXR_IRQ_MOD(_x) (NFP_NET_CFG_TXR_BASE + 0x500 + \ + ((_x) * 0x4)) + +/** + * RX ring configuration (0x0800 - 0x0c00) + * @NFP_NET_CFG_RXR_BASE: Base offset for RX ring configuration + * @NFP_NET_CFG_RXR_ADDR: Per RX ring DMA address (8B entries) + * @NFP_NET_CFG_RXR_SZ: Per RX ring ring size (1B entries) + * @NFP_NET_CFG_RXR_VEC: Per RX ring MSI-X table entry (1B entries) + * @NFP_NET_CFG_RXR_PRIO: Per RX ring priority (1B entries) + * @NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries) + */ +#define NFP_NET_CFG_RXR_BASE 0x0800 +#define NFP_NET_CFG_RXR_ADDR(_x) (NFP_NET_CFG_RXR_BASE + ((_x) * 0x8)) +#define NFP_NET_CFG_RXR_SZ(_x) (NFP_NET_CFG_RXR_BASE + 0x200 + (_x)) +#define NFP_NET_CFG_RXR_VEC(_x) (NFP_NET_CFG_RXR_BASE + 0x240 + (_x)) +#define NFP_NET_CFG_RXR_PRIO(_x) (NFP_NET_CFG_RXR_BASE + 0x280 + (_x)) +#define NFP_NET_CFG_RXR_IRQ_MOD(_x) (NFP_NET_CFG_RXR_BASE + 0x300 + \ + ((_x) * 0x4)) + +/** + * Interrupt Control/Cause registers (0x0c00 - 0x0d00) + * These registers are only used when MSI-X auto-masking is not + * enabled (@NFP_NET_CFG_CTRL_MSIXAUTO not set). The array is index + * by MSI-X entry and are 1B in size. If an entry is zero, the + * corresponding entry is enabled. If the FW generates an interrupt, + * it writes a cause into the corresponding field. This also masks + * the MSI-X entry and the host driver must clear the register to + * re-enable the interrupt. + */ +#define NFP_NET_CFG_ICR_BASE 0x0c00 +#define NFP_NET_CFG_ICR(_x) (NFP_NET_CFG_ICR_BASE + (_x)) +#define NFP_NET_CFG_ICR_UNMASKED 0x0 +#define NFP_NET_CFG_ICR_RXTX 0x1 +#define NFP_NET_CFG_ICR_LSC 0x2 + +/** + * General device stats (0x0d00 - 0x0d90) + * all counters are 64bit. + */ +#define NFP_NET_CFG_STATS_BASE 0x0d00 +#define NFP_NET_CFG_STATS_RX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x00) +#define NFP_NET_CFG_STATS_RX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x08) +#define NFP_NET_CFG_STATS_RX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x10) +#define NFP_NET_CFG_STATS_RX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x18) +#define NFP_NET_CFG_STATS_RX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x20) +#define NFP_NET_CFG_STATS_RX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x28) +#define NFP_NET_CFG_STATS_RX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x30) +#define NFP_NET_CFG_STATS_RX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x38) +#define NFP_NET_CFG_STATS_RX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x40) + +#define NFP_NET_CFG_STATS_TX_DISCARDS (NFP_NET_CFG_STATS_BASE + 0x48) +#define NFP_NET_CFG_STATS_TX_ERRORS (NFP_NET_CFG_STATS_BASE + 0x50) +#define NFP_NET_CFG_STATS_TX_OCTETS (NFP_NET_CFG_STATS_BASE + 0x58) +#define NFP_NET_CFG_STATS_TX_UC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x60) +#define NFP_NET_CFG_STATS_TX_MC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x68) +#define NFP_NET_CFG_STATS_TX_BC_OCTETS (NFP_NET_CFG_STATS_BASE + 0x70) +#define NFP_NET_CFG_STATS_TX_FRAMES (NFP_NET_CFG_STATS_BASE + 0x78) +#define NFP_NET_CFG_STATS_TX_MC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x80) +#define NFP_NET_CFG_STATS_TX_BC_FRAMES (NFP_NET_CFG_STATS_BASE + 0x88) + +/** + * Per ring stats (0x1000 - 0x1800) + * options, 64bit per entry + * @NFP_NET_CFG_TXR_STATS: TX ring statistics (Packet and Byte count) + * @NFP_NET_CFG_RXR_STATS: RX ring statistics (Packet and Byte count) + */ +#define NFP_NET_CFG_TXR_STATS_BASE 0x1000 +#define NFP_NET_CFG_TXR_STATS(_x) (NFP_NET_CFG_TXR_STATS_BASE + \ + ((_x) * 0x10)) +#define NFP_NET_CFG_RXR_STATS_BASE 0x1400 +#define NFP_NET_CFG_RXR_STATS(_x) (NFP_NET_CFG_RXR_STATS_BASE + \ + ((_x) * 0x10)) + +#endif /* _NFP_NET_CTRL_H_ */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c new file mode 100644 index 000000000000..4c97c713121c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -0,0 +1,235 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/rtnetlink.h> + +#include "nfp_net.h" + +static struct dentry *nfp_dir; + +static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_rx_ring *rx_ring = file->private; + int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; + struct nfp_net_rx_desc *rxd; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!rx_ring->r_vec || !rx_ring->r_vec->nfp_net) + goto out; + nn = rx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + rxd_cnt = rx_ring->cnt; + + fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl); + fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl); + rx_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_rx); + rx_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); + + seq_printf(file, "RX[%02d]: H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d RX_RD=%d RX_WR=%d\n", + rx_ring->idx, rx_ring->rd_p, rx_ring->wr_p, + fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p); + + for (i = 0; i < rxd_cnt; i++) { + rxd = &rx_ring->rxds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x", i, + rxd->vals[0], rxd->vals[1]); + + skb = READ_ONCE(rx_ring->rxbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + + if (rx_ring->rxbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &rx_ring->rxbufs[i].dma_addr); + + if (i == rx_ring->rd_p % rxd_cnt) + seq_puts(file, " H_RD "); + if (i == rx_ring->wr_p % rxd_cnt) + seq_puts(file, " H_WR "); + if (i == fl_rd_p % rxd_cnt) + seq_puts(file, " FL_RD"); + if (i == fl_wr_p % rxd_cnt) + seq_puts(file, " FL_WR"); + if (i == rx_rd_p % rxd_cnt) + seq_puts(file, " RX_RD"); + if (i == rx_wr_p % rxd_cnt) + seq_puts(file, " RX_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); +} + +static const struct file_operations nfp_rx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_rx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) +{ + struct nfp_net_tx_ring *tx_ring = file->private; + struct nfp_net_tx_desc *txd; + int d_rd_p, d_wr_p, txd_cnt; + struct sk_buff *skb; + struct nfp_net *nn; + int i; + + rtnl_lock(); + + if (!tx_ring->r_vec || !tx_ring->r_vec->nfp_net) + goto out; + nn = tx_ring->r_vec->nfp_net; + if (!netif_running(nn->netdev)) + goto out; + + txd_cnt = tx_ring->cnt; + + d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); + d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); + + seq_printf(file, "TX[%02d]: H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n", + tx_ring->idx, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); + + for (i = 0; i < txd_cnt; i++) { + txd = &tx_ring->txds[i]; + seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, + txd->vals[0], txd->vals[1], + txd->vals[2], txd->vals[3]); + + skb = READ_ONCE(tx_ring->txbufs[i].skb); + if (skb) + seq_printf(file, " skb->head=%p skb->data=%p", + skb->head, skb->data); + if (tx_ring->txbufs[i].dma_addr) + seq_printf(file, " dma_addr=%pad", + &tx_ring->txbufs[i].dma_addr); + + if (i == tx_ring->rd_p % txd_cnt) + seq_puts(file, " H_RD"); + if (i == tx_ring->wr_p % txd_cnt) + seq_puts(file, " H_WR"); + if (i == d_rd_p % txd_cnt) + seq_puts(file, " D_RD"); + if (i == d_wr_p % txd_cnt) + seq_puts(file, " D_WR"); + + seq_putc(file, '\n'); + } +out: + rtnl_unlock(); + return 0; +} + +static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) +{ + return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); +} + +static const struct file_operations nfp_tx_q_fops = { + .owner = THIS_MODULE, + .open = nfp_net_debugfs_tx_q_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + +void nfp_net_debugfs_adapter_add(struct nfp_net *nn) +{ + static struct dentry *queues, *tx, *rx; + char int_name[16]; + int i; + + if (IS_ERR_OR_NULL(nfp_dir)) + return; + + nn->debugfs_dir = debugfs_create_dir(pci_name(nn->pdev), nfp_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + /* Create queue debugging sub-tree */ + queues = debugfs_create_dir("queue", nn->debugfs_dir); + if (IS_ERR_OR_NULL(nn->debugfs_dir)) + return; + + rx = debugfs_create_dir("rx", queues); + tx = debugfs_create_dir("tx", queues); + if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx)) + return; + + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, rx, + &nn->rx_rings[i], &nfp_rx_q_fops); + } + + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(int_name, "%d", i); + debugfs_create_file(int_name, S_IRUSR, tx, + &nn->tx_rings[i], &nfp_tx_q_fops); + } +} + +void nfp_net_debugfs_adapter_del(struct nfp_net *nn) +{ + debugfs_remove_recursive(nn->debugfs_dir); + nn->debugfs_dir = NULL; +} + +void nfp_net_debugfs_create(void) +{ + nfp_dir = debugfs_create_dir("nfp_net", NULL); +} + +void nfp_net_debugfs_destroy(void) +{ + debugfs_remove_recursive(nfp_dir); + nfp_dir = NULL; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c new file mode 100644 index 000000000000..9a4084a68db5 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -0,0 +1,640 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_ethtool.c + * Netronome network device driver: ethtool support + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + */ + +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/ethtool.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +/* Support for stats. Returns netdev, driver, and device stats */ +enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; +struct _nfp_net_et_stats { + char name[ETH_GSTRING_LEN]; + int type; + int sz; + int off; +}; + +#define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ + FIELD_SIZEOF(struct net_device_stats, m), \ + offsetof(struct net_device_stats, m) +/* For stats in the control BAR (other than Q stats) */ +#define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ + sizeof(u64), \ + (m) +static const struct _nfp_net_et_stats nfp_net_et_stats[] = { + /* netdev stats */ + {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, + {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, + {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, + {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, + {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, + {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, + {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, + {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, + {"multicast", NN_ET_NETDEV_STAT(multicast)}, + {"collisions", NN_ET_NETDEV_STAT(collisions)}, + {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, + {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, + {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, + {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, + {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, + {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, + {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, + {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, + /* Stats from the device */ + {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, + {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, + {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, + {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, + {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, + {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, + {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, + {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, + {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, + + {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, + {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, + {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, + {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, + {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, + {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, + {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, + {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, + {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, +}; + +#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) +#define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) +#define NN_ET_RVEC_GATHER_STATS 7 +#define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) +#define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ + NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) + +static void nfp_net_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + struct nfp_net *nn = netdev_priv(netdev); + + strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); + strlcpy(drvinfo->version, nfp_net_driver_version, + sizeof(drvinfo->version)); + + snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), + "%d.%d.%d.%d", + nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor); + strlcpy(drvinfo->bus_info, pci_name(nn->pdev), + sizeof(drvinfo->bus_info)); + + drvinfo->n_stats = NN_ET_STATS_LEN; + drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + + ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; + ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; + ring->rx_pending = nn->rxd_cnt; + ring->tx_pending = nn->txd_cnt; +} + +static int nfp_net_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 rxd_cnt, txd_cnt; + + if (netif_running(netdev)) { + /* Some NIC drivers allow reconfiguration on the fly, + * some down the interface, change and then up it + * again. For now we don't allow changes when the + * device is up. + */ + nn_warn(nn, "Can't change rings while device is up\n"); + return -EBUSY; + } + + /* We don't have separate queues/rings for small/large frames. */ + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + /* Round up to supported values */ + rxd_cnt = roundup_pow_of_two(ring->rx_pending); + rxd_cnt = max_t(u32, rxd_cnt, NFP_NET_MIN_RX_DESCS); + rxd_cnt = min_t(u32, rxd_cnt, NFP_NET_MAX_RX_DESCS); + + txd_cnt = roundup_pow_of_two(ring->tx_pending); + txd_cnt = max_t(u32, txd_cnt, NFP_NET_MIN_TX_DESCS); + txd_cnt = min_t(u32, txd_cnt, NFP_NET_MAX_TX_DESCS); + + if (nn->rxd_cnt != rxd_cnt || nn->txd_cnt != txd_cnt) + nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", + nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); + + nn->rxd_cnt = rxd_cnt; + nn->txd_cnt = txd_cnt; + + return 0; +} + +static void nfp_net_get_strings(struct net_device *netdev, + u32 stringset, u8 *data) +{ + struct nfp_net *nn = netdev_priv(netdev); + u8 *p = data; + int i; + + switch (stringset) { + case ETH_SS_STATS: + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_r_vecs; i++) { + sprintf(p, "rvec_%u_rx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rvec_%u_tx_busy", i); + p += ETH_GSTRING_LEN; + } + strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_gather", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + strncpy(p, "tx_lso", ETH_GSTRING_LEN); + p += ETH_GSTRING_LEN; + for (i = 0; i < nn->num_tx_rings; i++) { + sprintf(p, "txq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "txq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + for (i = 0; i < nn->num_rx_rings; i++) { + sprintf(p, "rxq_%u_pkts", i); + p += ETH_GSTRING_LEN; + sprintf(p, "rxq_%u_bytes", i); + p += ETH_GSTRING_LEN; + } + break; + } +} + +static void nfp_net_get_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; + struct nfp_net *nn = netdev_priv(netdev); + struct rtnl_link_stats64 *netdev_stats; + struct rtnl_link_stats64 temp = {}; + u64 tmp[NN_ET_RVEC_GATHER_STATS]; + u8 __iomem *io_p; + int i, j, k; + u8 *p; + + netdev_stats = dev_get_stats(netdev, &temp); + + for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { + switch (nfp_net_et_stats[i].type) { + case NETDEV_ET_STATS: + p = (char *)netdev_stats + nfp_net_et_stats[i].off; + data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? + *(u64 *)p : *(u32 *)p; + break; + + case NFP_NET_DEV_ET_STATS: + io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; + data[i] = readq(io_p); + break; + } + } + for (j = 0; j < nn->num_r_vecs; j++) { + unsigned int start; + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); + data[i++] = nn->r_vecs[j].rx_pkts; + tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; + tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; + tmp[2] = nn->r_vecs[j].hw_csum_rx_error; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); + + do { + start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); + data[i++] = nn->r_vecs[j].tx_pkts; + data[i++] = nn->r_vecs[j].tx_busy; + tmp[3] = nn->r_vecs[j].hw_csum_tx; + tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; + tmp[5] = nn->r_vecs[j].tx_gather; + tmp[6] = nn->r_vecs[j].tx_lso; + } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); + + for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) + gathered_stats[k] += tmp[k]; + } + for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) + data[i++] = gathered_stats[j]; + for (j = 0; j < nn->num_tx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; + data[i++] = readq(io_p); + } + for (j = 0; j < nn->num_rx_rings; j++) { + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); + data[i++] = readq(io_p); + io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; + data[i++] = readq(io_p); + } +} + +static int nfp_net_get_sset_count(struct net_device *netdev, int sset) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (sset) { + case ETH_SS_STATS: + return NN_ET_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +/* RX network flow classification (RSS, filters, etc) + */ +static u32 ethtool_flow_to_nfp_flag(u32 flow_type) +{ + static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = { + [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP, + [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP, + [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP, + [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP, + [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4, + [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6, + }; + + if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp)) + return 0; + + return xlate_ethtool_to_nfp[flow_type]; +} + +static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, + struct ethtool_rxnfc *cmd) +{ + u32 nfp_rss_flag; + + cmd->data = 0; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + cmd->data |= RXH_IP_SRC | RXH_IP_DST; + if (nn->rss_cfg & nfp_rss_flag) + cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; + + return 0; +} + +static int nfp_net_get_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd, u32 *rule_locs) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_GRXRINGS: + cmd->data = nn->num_rx_rings; + return 0; + case ETHTOOL_GRXFH: + return nfp_net_get_rss_hash_opts(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, + struct ethtool_rxnfc *nfc) +{ + u32 new_rss_cfg = nn->rss_cfg; + u32 nfp_rss_flag; + int err; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + /* RSS only supports IP SA/DA and L4 src/dst ports */ + if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | + RXH_L4_B_0_1 | RXH_L4_B_2_3)) + return -EINVAL; + + /* We need at least the IP SA/DA fields for hashing */ + if (!(nfc->data & RXH_IP_SRC) || + !(nfc->data & RXH_IP_DST)) + return -EINVAL; + + nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type); + if (!nfp_rss_flag) + return -EINVAL; + + switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { + case 0: + new_rss_cfg &= ~nfp_rss_flag; + break; + case (RXH_L4_B_0_1 | RXH_L4_B_2_3): + new_rss_cfg |= nfp_rss_flag; + break; + default: + return -EINVAL; + } + + new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; + new_rss_cfg |= NFP_NET_CFG_RSS_MASK; + + if (new_rss_cfg == nn->rss_cfg) + return 0; + + writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); + if (err) + return err; + + nn->rss_cfg = new_rss_cfg; + + nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); + return 0; +} + +static int nfp_net_set_rxnfc(struct net_device *netdev, + struct ethtool_rxnfc *cmd) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (cmd->cmd) { + case ETHTOOL_SRXFH: + return nfp_net_set_rss_hash_opt(nn, cmd); + default: + return -EOPNOTSUPP; + } +} + +static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return 0; + + return ARRAY_SIZE(nn->rss_itbl); +} + +static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev) +{ + return NFP_NET_CFG_RSS_KEY_SZ; +} + +static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, + u8 *hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) + return -EOPNOTSUPP; + + if (indir) + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + indir[i] = nn->rss_itbl[i]; + if (key) + memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); + if (hfunc) + *hfunc = ETH_RSS_HASH_TOP; + + return 0; +} + +static int nfp_net_set_rxfh(struct net_device *netdev, + const u32 *indir, const u8 *key, + const u8 hfunc) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || + !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP)) + return -EOPNOTSUPP; + + if (!key && !indir) + return 0; + + if (key) { + memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ); + nfp_net_rss_write_key(nn); + } + if (indir) { + for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) + nn->rss_itbl[i] = indir[i]; + + nfp_net_rss_write_itbl(nn); + } + + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); +} + +/* Dump BAR registers + */ +static int nfp_net_get_regs_len(struct net_device *netdev) +{ + return NFP_NET_CFG_BAR_SZ; +} + +static void nfp_net_get_regs(struct net_device *netdev, + struct ethtool_regs *regs, void *p) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 *regs_buf = p; + int i; + + regs->version = nn_readl(nn, NFP_NET_CFG_VERSION); + + for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) + regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); +} + +static int nfp_net_get_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; + ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; + ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; + ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; + + return 0; +} + +static int nfp_net_set_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ec) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int factor; + + if (ec->rx_coalesce_usecs_irq || + ec->rx_max_coalesced_frames_irq || + ec->tx_coalesce_usecs_irq || + ec->tx_max_coalesced_frames_irq || + ec->stats_block_coalesce_usecs || + ec->use_adaptive_rx_coalesce || + ec->use_adaptive_tx_coalesce || + ec->pkt_rate_low || + ec->rx_coalesce_usecs_low || + ec->rx_max_coalesced_frames_low || + ec->tx_coalesce_usecs_low || + ec->tx_max_coalesced_frames_low || + ec->pkt_rate_high || + ec->rx_coalesce_usecs_high || + ec->rx_max_coalesced_frames_high || + ec->tx_coalesce_usecs_high || + ec->tx_max_coalesced_frames_high || + ec->rate_sample_interval) + return -ENOTSUPP; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->me_freq_mhz / 16; + + /* Each pair of (usecs, max_frames) fields specifies that interrupts + * should be coalesced until + * (usecs > 0 && time_since_first_completion >= usecs) || + * (max_frames > 0 && completed_frames >= max_frames) + * + * It is illegal to set both usecs and max_frames to zero as this would + * cause interrupts to never be generated. To disable coalescing, set + * usecs = 0 and max_frames = 1. + * + * Some implementations ignore the value of max_frames and use the + * condition time_since_first_completion >= usecs + */ + + if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) + return -EINVAL; + + /* ensure valid configuration */ + if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) + return -EINVAL; + + if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) + return -EINVAL; + + if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) + return -EINVAL; + + /* configuration is valid */ + nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; + nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; + nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; + nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; + + /* write configuration to device */ + nfp_net_coalesce_write_cfg(nn); + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); +} + +static const struct ethtool_ops nfp_net_ethtool_ops = { + .get_drvinfo = nfp_net_get_drvinfo, + .get_ringparam = nfp_net_get_ringparam, + .set_ringparam = nfp_net_set_ringparam, + .get_strings = nfp_net_get_strings, + .get_ethtool_stats = nfp_net_get_stats, + .get_sset_count = nfp_net_get_sset_count, + .get_rxnfc = nfp_net_get_rxnfc, + .set_rxnfc = nfp_net_set_rxnfc, + .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, + .get_rxfh_key_size = nfp_net_get_rxfh_key_size, + .get_rxfh = nfp_net_get_rxfh, + .set_rxfh = nfp_net_set_rxfh, + .get_regs_len = nfp_net_get_regs_len, + .get_regs = nfp_net_get_regs, + .get_coalesce = nfp_net_get_coalesce, + .set_coalesce = nfp_net_set_coalesce, +}; + +void nfp_net_set_ethtool_ops(struct net_device *netdev) +{ + netdev->ethtool_ops = &nfp_net_ethtool_ops; +} diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c new file mode 100644 index 000000000000..e2b22b8a20f1 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c @@ -0,0 +1,385 @@ +/* + * Copyright (C) 2015 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_netvf_main.c + * Netronome virtual function network device driver: Main entry point + * Author: Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/etherdevice.h> + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" + +const char nfp_net_driver_name[] = "nfp_netvf"; +const char nfp_net_driver_version[] = "0.1"; +#define PCI_DEVICE_NFP6000VF 0x6003 +static const struct pci_device_id nfp_netvf_pci_device_ids[] = { + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { 0, } /* Required last entry. */ +}; +MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids); + +static void nfp_netvf_get_mac_addr(struct nfp_net *nn) +{ + u8 mac_addr[ETH_ALEN]; + + put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]); + /* We can't do readw for NFP-3200 compatibility */ + put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16, + &mac_addr[4]); + + if (!is_valid_ether_addr(mac_addr)) { + eth_hw_addr_random(nn->netdev); + return; + } + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); +} + +static int nfp_netvf_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + struct nfp_net_fw_version fw_ver; + int max_tx_rings, max_rx_rings; + u32 tx_bar_off, rx_bar_off; + u32 tx_bar_sz, rx_bar_sz; + int tx_bar_no, rx_bar_no; + u8 __iomem *ctrl_bar; + struct nfp_net *nn; + int is_nfp3200; + u32 startq; + int stride; + int err; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + err = pci_request_regions(pdev, nfp_net_driver_name); + if (err) { + dev_err(&pdev->dev, "Unable to allocate device memory.\n"); + goto err_pci_disable; + } + + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + is_nfp3200 = 0; + break; + default: + err = -ENODEV; + goto err_pci_regions; + } + + pci_set_master(pdev); + + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS)); + if (err) + goto err_pci_regions; + + /* Map the Control BAR. + * + * Irrespective of the advertised BAR size we only map the + * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code + * the identical for PF and VF drivers. + */ + ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CRTL_BAR), + NFP_NET_CFG_BAR_SZ); + if (!ctrl_bar) { + dev_err(&pdev->dev, + "Failed to map resource %d\n", NFP_NET_CRTL_BAR); + err = -EIO; + goto err_pci_regions; + } + + nfp_net_get_fw_version(&fw_ver, ctrl_bar); + if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) { + dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + + /* Determine stride */ + if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) || + nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n"); + } else { + switch (fw_ver.major) { + case 1 ... 3: + if (is_nfp3200) { + stride = 2; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = NFP_NET_Q1_BAR; + } else { + stride = 4; + tx_bar_no = NFP_NET_Q0_BAR; + rx_bar_no = tx_bar_no; + } + break; + default: + dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, + fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + } + + /* Find out how many rings are supported */ + max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS); + max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS); + + tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride; + rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride; + + /* Sanity checks */ + if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) { + dev_err(&pdev->dev, + "TX BAR too small for number of TX rings. Adjusting\n"); + tx_bar_sz = pci_resource_len(pdev, tx_bar_no); + max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) { + dev_err(&pdev->dev, + "RX BAR too small for number of RX rings. Adjusting\n"); + rx_bar_sz = pci_resource_len(pdev, rx_bar_no); + max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2; + } + + /* XXX Implement a workaround for THB-350 here. Ideally, we + * have a different PCI ID for A rev VFs. + */ + switch (pdev->device) { + case PCI_DEVICE_NFP6000VF: + startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tx_bar_off = NFP_PCIE_QUEUE(startq); + startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + rx_bar_off = NFP_PCIE_QUEUE(startq); + break; + default: + err = -ENODEV; + goto err_ctrl_unmap; + } + + /* Allocate and initialise the netdev */ + nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings); + if (IS_ERR(nn)) { + err = PTR_ERR(nn); + goto err_ctrl_unmap; + } + + nn->fw_ver = fw_ver; + nn->ctrl_bar = ctrl_bar; + nn->is_vf = 1; + nn->is_nfp3200 = is_nfp3200; + nn->stride_tx = stride; + nn->stride_rx = stride; + + if (rx_bar_no == tx_bar_no) { + u32 bar_off, bar_sz; + resource_size_t map_addr; + + /* Make a single overlapping BAR mapping */ + if (tx_bar_off < rx_bar_off) + bar_off = tx_bar_off; + else + bar_off = rx_bar_off; + + if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz)) + bar_sz = (tx_bar_off + tx_bar_sz) - bar_off; + else + bar_sz = (rx_bar_off + rx_bar_sz) - bar_off; + + map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off; + nn->q_bar = ioremap_nocache(map_addr, bar_sz); + if (!nn->q_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* TX queues */ + nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off); + /* RX queues */ + nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off); + } else { + resource_size_t map_addr; + + /* TX queues */ + map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off; + nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz); + if (!nn->tx_bar) { + nn_err(nn, "Failed to map resource %d\n", tx_bar_no); + err = -EIO; + goto err_netdev_free; + } + + /* RX queues */ + map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off; + nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz); + if (!nn->rx_bar) { + nn_err(nn, "Failed to map resource %d\n", rx_bar_no); + err = -EIO; + goto err_unmap_tx; + } + } + + nfp_netvf_get_mac_addr(nn); + + err = nfp_net_irqs_alloc(nn); + if (!err) { + nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n"); + err = -EIO; + goto err_unmap_rx; + } + + /* Get ME clock frequency from ctrl BAR + * XXX for now frequency is hardcoded until we figure out how + * to get the value from nfp-hwinfo into ctrl bar + */ + nn->me_freq_mhz = 1200; + + err = nfp_net_netdev_init(nn->netdev); + if (err) + goto err_irqs_disable; + + pci_set_drvdata(pdev, nn); + + nfp_net_info(nn); + nfp_net_debugfs_adapter_add(nn); + + return 0; + +err_irqs_disable: + nfp_net_irqs_disable(nn); +err_unmap_rx: + if (!nn->q_bar) + iounmap(nn->rx_bar); +err_unmap_tx: + if (!nn->q_bar) + iounmap(nn->tx_bar); + else + iounmap(nn->q_bar); +err_netdev_free: + pci_set_drvdata(pdev, NULL); + nfp_net_netdev_free(nn); +err_ctrl_unmap: + iounmap(ctrl_bar); +err_pci_regions: + pci_release_regions(pdev); +err_pci_disable: + pci_disable_device(pdev); + return err; +} + +static void nfp_netvf_pci_remove(struct pci_dev *pdev) +{ + struct nfp_net *nn = pci_get_drvdata(pdev); + + /* Note, the order is slightly different from above as we need + * to keep the nn pointer around till we have freed everything. + */ + nfp_net_debugfs_adapter_del(nn); + + nfp_net_netdev_clean(nn->netdev); + + nfp_net_irqs_disable(nn); + + if (!nn->q_bar) { + iounmap(nn->rx_bar); + iounmap(nn->tx_bar); + } else { + iounmap(nn->q_bar); + } + iounmap(nn->ctrl_bar); + + pci_set_drvdata(pdev, NULL); + + nfp_net_netdev_free(nn); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver nfp_netvf_pci_driver = { + .name = nfp_net_driver_name, + .id_table = nfp_netvf_pci_device_ids, + .probe = nfp_netvf_pci_probe, + .remove = nfp_netvf_pci_remove, +}; + +static int __init nfp_netvf_init(void) +{ + int err; + + pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n", + nfp_net_driver_name); + + nfp_net_debugfs_create(); + err = pci_register_driver(&nfp_netvf_pci_driver); + if (err) { + nfp_net_debugfs_destroy(); + return err; + } + + return 0; +} + +static void __exit nfp_netvf_exit(void) +{ + pci_unregister_driver(&nfp_netvf_pci_driver); + nfp_net_debugfs_destroy(); +} + +module_init(nfp_netvf_init); +module_exit(nfp_netvf_exit); + +MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NFP VF network device driver"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 17+ messages in thread
* Re: [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski @ 2015-12-03 19:18 ` David Miller 2 siblings, 0 replies; 17+ messages in thread From: David Miller @ 2015-12-03 19:18 UTC (permalink / raw) To: jakub.kicinski; +Cc: netdev, simon.horman, rolf.neugebauer From: Jakub Kicinski <jakub.kicinski@netronome.com> Date: Tue, 1 Dec 2015 14:55:20 +0000 > This patchset adds support for VFs of Netronome's NFP-4000 and NFP-6000 > based NICs. We are currently also preparing the submission for the PF > driver, but it is not quite ready yet. The PF driver can be found on > GitHub: > > https://github.com/Netronome/nfp-drv-kmods Series applied, thanks. ^ permalink raw reply [flat|nested] 17+ messages in thread
end of thread, other threads:[~2015-12-03 19:28 UTC | newest] Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-10-27 18:15 [PATCHv2 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-10-27 18:15 ` [PATCHv2 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-10-30 10:27 ` David Miller 2015-11-23 11:04 ` [PATCH net-next v3 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-11-23 11:04 ` [PATCH net-next v3 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-11-24 19:25 ` David Miller 2015-11-24 19:53 ` Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-11-25 15:39 ` [PATCH net-next v4 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-11-30 15:42 ` David Miller 2015-12-01 14:55 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 1/2] pci_ids: add Netronome Systems vendor Jakub Kicinski 2015-12-01 14:55 ` [PATCH net-next v5 2/2] net: add driver for Netronome NFP4000/NFP6000 NIC VFs Jakub Kicinski 2015-12-03 19:18 ` [PATCH net-next v5 0/2] Netronome NFP4000/NFP6000 NIC VF driver David Miller
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).