[PATCH v3 5/6] DPDK-ENIC PMD interface

[Sujith Sankar <ssujith-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>]

Signed-off-by: Sujith Sankar <ssujith-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
---
 lib/librte_pmd_enic/enic_etherdev.c | 613 ++++++++++++++++++++++++++++++++++++
 1 file changed, 613 insertions(+)
 create mode 100644 lib/librte_pmd_enic/enic_etherdev.c

diff --git a/lib/librte_pmd_enic/enic_etherdev.c b/lib/librte_pmd_enic/enic_etherdev.c
new file mode 100644
index 0000000..441c85a
--- /dev/null
+++ b/lib/librte_pmd_enic/enic_etherdev.c
@@ -0,0 +1,613 @@
+/*
+ * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * Copyright (c) 2014, Cisco Systems, Inc. 
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ident "$Id$"
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include <rte_dev.h>
+#include <rte_pci.h>
+#include <rte_ethdev.h>
+#include <rte_string_fns.h>
+
+#include "vnic_intr.h"
+#include "vnic_cq.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_enet.h"
+#include "enic.h"
+
+#define ENICPMD_FUNC_TRACE() \
+    RTE_LOG(DEBUG, PMD, "ENICPMD trace: %s\n", __func__)
+
+/*
+ * The set of PCI devices this driver supports
+ */
+static struct rte_pci_id pci_id_enic_map[] = {
+#define RTE_PCI_DEV_ID_DECL_ENIC(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
+#ifndef PCI_VENDOR_ID_CISCO
+#define PCI_VENDOR_ID_CISCO	0x1137
+#endif
+#include "rte_pci_dev_ids.h"
+RTE_PCI_DEV_ID_DECL_ENIC(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET)
+RTE_PCI_DEV_ID_DECL_ENIC(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF)
+{.vendor_id = 0, /* Sentinal */},
+};
+
+static int enicpmd_fdir_remove_perfect_filter(struct rte_eth_dev *eth_dev,
+		struct rte_fdir_filter *fdir_filter,
+		uint16_t soft_id)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	return enic_fdir_del_fltr(enic, fdir_filter);
+}
+
+static int enicpmd_fdir_add_perfect_filter(struct rte_eth_dev *eth_dev,
+	struct rte_fdir_filter *fdir_filter, uint16_t soft_id,
+	uint8_t queue, uint8_t drop)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	return enic_fdir_add_fltr(enic, fdir_filter, (uint16_t)queue, drop);
+}
+
+static void enicpmd_fdir_info_get(struct rte_eth_dev *eth_dev,
+	struct rte_eth_fdir *fdir)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	*fdir = enic->fdir.stats;
+}
+
+static void enicpmd_dev_tx_queue_release(void *txq)
+{
+	ENICPMD_FUNC_TRACE();
+	enic_free_wq(txq);
+}
+
+static int enicpmd_dev_setup_intr(struct enic *enic)
+{
+	int ret;
+	int index;
+
+	ENICPMD_FUNC_TRACE();
+
+	/* Are we done with the init of all the queues? */
+	for (index = 0; index < enic->cq_count; index++) {
+		if (!enic->cq[index].ctrl)
+			break;
+	}
+
+	if (enic->cq_count != index)
+		return 0;
+
+	ret = enic_alloc_intr_resources(enic);
+	if (ret) {
+		dev_err(enic, "alloc intr failed\n");
+		return ret;
+	}
+	enic_init_vnic_resources(enic);
+
+	ret = enic_setup_finish(enic);
+	if (ret)
+		dev_err(enic, "setup could not be finished\n");
+
+	return ret;
+}
+
+static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx,
+	uint16_t nb_desc,
+	unsigned int socket_id,
+	const struct rte_eth_txconf *tx_conf)
+{
+	int ret;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	eth_dev->data->tx_queues[queue_idx] = (void *)&enic->wq[queue_idx];
+
+	ret = enic_alloc_wq(enic, queue_idx, socket_id, nb_desc);
+	if (ret) {
+		dev_err(enic, "error in allocating wq\n");
+		return ret;
+	}
+
+	return enicpmd_dev_setup_intr(enic);
+}
+
+static int enicpmd_dev_tx_queue_start(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	enic_start_wq(enic, queue_idx);
+
+	return 0;
+}
+
+static int enicpmd_dev_tx_queue_stop(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx)
+{
+	int ret;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	ret = enic_stop_wq(enic, queue_idx);
+	if (ret)
+		dev_err(enic, "error in stopping wq %d\n", queue_idx);
+
+	return ret;
+}
+
+static int enicpmd_dev_rx_queue_start(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	enic_start_rq(enic, queue_idx);
+
+	return 0;
+}
+
+static int enicpmd_dev_rx_queue_stop(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx)
+{
+	int ret;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	ret = enic_stop_rq(enic, queue_idx);
+	if (ret)
+		dev_err(enic, "error in stopping rq %d\n", queue_idx);
+
+	return ret;
+}
+
+static void enicpmd_dev_rx_queue_release(void *rxq)
+{
+	ENICPMD_FUNC_TRACE();
+	enic_free_rq(rxq);
+}
+
+static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
+	uint16_t queue_idx,
+	uint16_t nb_desc,
+	unsigned int socket_id,
+	const struct rte_eth_rxconf *rx_conf,
+	struct rte_mempool *mp)
+{
+	int ret;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	eth_dev->data->rx_queues[queue_idx] = (void *)&enic->rq[queue_idx];
+
+	ret = enic_alloc_rq(enic, queue_idx, socket_id, mp, nb_desc);
+	if (ret) {
+		dev_err(enic, "error in allocating rq\n");
+		return ret;
+	}
+
+	return enicpmd_dev_setup_intr(enic);
+}
+
+static int enicpmd_vlan_filter_set(struct rte_eth_dev *eth_dev,
+	uint16_t vlan_id, int on)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	if (on)
+		enic_add_vlan(enic, vlan_id);
+	else
+		enic_del_vlan(enic, vlan_id);
+	return 0;
+}
+
+static void enicpmd_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	if (mask & ETH_VLAN_STRIP_MASK) {
+		if (eth_dev->data->dev_conf.rxmode.hw_vlan_strip)
+			enic->ig_vlan_strip_en = 1;
+		else
+			enic->ig_vlan_strip_en = 0;
+	}
+	enic_set_rss_nic_cfg(enic);
+
+
+	if (mask & ETH_VLAN_FILTER_MASK) {
+		dev_warning(enic,
+			"Configuration of VLAN filter is not supported\n");
+	}
+
+	if (mask & ETH_VLAN_EXTEND_MASK) {
+		dev_warning(enic,
+			"Configuration of extended VLAN is not supported\n");
+	}
+}
+
+static int enicpmd_dev_configure(struct rte_eth_dev *eth_dev)
+{
+	int ret;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	ret = enic_set_vnic_res(enic);
+	if (ret) {
+		dev_err(enic, "Set vNIC resource num  failed, aborting\n");
+		return ret;
+	}
+
+	if (eth_dev->data->dev_conf.rxmode.split_hdr_size &&
+		eth_dev->data->dev_conf.rxmode.header_split) {
+		/* Enable header-data-split */
+		enic_set_hdr_split_size(enic,
+			eth_dev->data->dev_conf.rxmode.split_hdr_size);
+	}
+
+	enic->hw_ip_checksum = eth_dev->data->dev_conf.rxmode.hw_ip_checksum;
+	return 0;
+}
+
+/* Start the device.
+ * It returns 0 on success.
+ */
+static int enicpmd_dev_start(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	return enic_enable(enic);
+}
+
+/*
+ * Stop device: disable rx and tx functions to allow for reconfiguring.
+ */
+static void enicpmd_dev_stop(struct rte_eth_dev *eth_dev)
+{
+	struct rte_eth_link link;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_disable(enic);
+	memset(&link, 0, sizeof(link));
+	rte_atomic64_cmpset((uint64_t *)&eth_dev->data->dev_link,
+		*(uint64_t *)&eth_dev->data->dev_link,
+		*(uint64_t *)&link);
+}
+
+/*
+ * Stop device.
+ */
+static void enicpmd_dev_close(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_remove(enic);
+}
+
+static int enicpmd_dev_link_update(struct rte_eth_dev *eth_dev,
+	int wait_to_complete)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+	int ret;
+	int link_status = 0;
+
+	ENICPMD_FUNC_TRACE();
+	link_status = enic_get_link_status(enic);
+	ret = (link_status == enic->link_status);
+	enic->link_status = link_status;
+	eth_dev->data->dev_link.link_status = link_status;
+	eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
+	eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
+	return ret;
+}
+
+static void enicpmd_dev_stats_get(struct rte_eth_dev *eth_dev,
+	struct rte_eth_stats *stats)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_dev_stats_get(enic, stats);
+}
+
+static void enicpmd_dev_stats_reset(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_dev_stats_clear(enic);
+}
+
+static void enicpmd_dev_info_get(struct rte_eth_dev *eth_dev,
+	struct rte_eth_dev_info *device_info)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	device_info->max_rx_queues = enic->rq_count;
+	device_info->max_tx_queues = enic->wq_count;
+	device_info->min_rx_bufsize = ENIC_MIN_MTU;
+	device_info->max_rx_pktlen = enic->config.mtu;
+	device_info->max_mac_addrs = 1;
+	device_info->rx_offload_capa =
+		DEV_RX_OFFLOAD_VLAN_STRIP |
+		DEV_RX_OFFLOAD_IPV4_CKSUM |
+		DEV_RX_OFFLOAD_UDP_CKSUM  |
+		DEV_RX_OFFLOAD_TCP_CKSUM;
+	device_info->tx_offload_capa =
+		DEV_TX_OFFLOAD_VLAN_INSERT |
+		DEV_TX_OFFLOAD_IPV4_CKSUM  |
+		DEV_TX_OFFLOAD_UDP_CKSUM   |
+		DEV_TX_OFFLOAD_TCP_CKSUM;
+}
+
+static void enicpmd_dev_promiscuous_enable(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic->promisc = 1;
+	enic_add_packet_filter(enic);
+}
+
+static void enicpmd_dev_promiscuous_disable(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic->promisc = 0;
+	enic_add_packet_filter(enic);
+}
+
+static void enicpmd_dev_allmulticast_enable(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic->allmulti = 1;
+	enic_add_packet_filter(enic);
+}
+
+static void enicpmd_dev_allmulticast_disable(struct rte_eth_dev *eth_dev)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic->allmulti = 0;
+	enic_add_packet_filter(enic);
+}
+
+static void enicpmd_add_mac_addr(struct rte_eth_dev *eth_dev,
+	struct ether_addr *mac_addr,
+	uint32_t index, uint32_t pool)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_set_mac_address(enic, mac_addr->addr_bytes);
+}
+
+static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, uint32_t index)
+{
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+	enic_del_mac_address(enic);
+}
+
+
+static uint16_t enicpmd_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+	uint16_t nb_pkts)
+{
+	unsigned int index;
+	unsigned int frags;
+	unsigned int pkt_len;
+	unsigned int seg_len;
+	unsigned int inc_len;
+	unsigned int nb_segs;
+	struct rte_mbuf *tx_pkt;
+	struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
+	struct enic *enic = vnic_dev_priv(wq->vdev);
+	unsigned char *buf;
+	unsigned short vlan_id;
+	unsigned short ol_flags;
+
+	for (index = 0; index < nb_pkts; index++) {
+		tx_pkt = *tx_pkts++;
+		inc_len = 0;
+		nb_segs = tx_pkt->nb_segs;
+		if (nb_segs > vnic_wq_desc_avail(wq)) {
+			/* wq cleanup and try again */
+			if (!enic_cleanup_wq(enic, wq) ||
+				(nb_segs > vnic_wq_desc_avail(wq)))
+				return index;
+		}
+		pkt_len = tx_pkt->pkt_len;
+		vlan_id = tx_pkt->vlan_tci;
+		ol_flags = tx_pkt->ol_flags;
+		for (frags = 0; inc_len < pkt_len; frags++) {
+			if (!tx_pkt)
+				break;
+			seg_len = tx_pkt->data_len;
+			inc_len += seg_len;
+			if (enic_send_pkt(enic, wq, tx_pkt,
+				    (unsigned short)seg_len, !frags,
+				    (pkt_len == inc_len), ol_flags, vlan_id)) {
+				break;
+			}
+			tx_pkt = tx_pkt->next;
+		}
+	}
+
+	enic_cleanup_wq(enic, wq);
+	return index;
+}
+
+static uint16_t enicpmd_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+	uint16_t nb_pkts)
+{
+	struct vnic_rq *rq = (struct vnic_rq *)rx_queue;
+	unsigned int work_done;
+
+	if (enic_poll(rq, rx_pkts, (unsigned int)nb_pkts, &work_done))
+		dev_err(enic, "error in enicpmd poll\n");
+
+	return work_done;
+}
+
+static struct eth_dev_ops enicpmd_eth_dev_ops = {
+	.dev_configure        = enicpmd_dev_configure,
+	.dev_start            = enicpmd_dev_start,
+	.dev_stop             = enicpmd_dev_stop,
+	.dev_set_link_up      = NULL,
+	.dev_set_link_down    = NULL,
+	.dev_close            = enicpmd_dev_close,
+	.promiscuous_enable   = enicpmd_dev_promiscuous_enable,
+	.promiscuous_disable  = enicpmd_dev_promiscuous_disable,
+	.allmulticast_enable  = enicpmd_dev_allmulticast_enable,
+	.allmulticast_disable = enicpmd_dev_allmulticast_disable,
+	.link_update          = enicpmd_dev_link_update,
+	.stats_get            = enicpmd_dev_stats_get,
+	.stats_reset          = enicpmd_dev_stats_reset,
+	.queue_stats_mapping_set = NULL,
+	.dev_infos_get        = enicpmd_dev_info_get,
+	.mtu_set              = NULL,
+	.vlan_filter_set      = enicpmd_vlan_filter_set,
+	.vlan_tpid_set        = NULL,
+	.vlan_offload_set     = enicpmd_vlan_offload_set,
+	.vlan_strip_queue_set = NULL,
+	.rx_queue_start       = enicpmd_dev_rx_queue_start,
+	.rx_queue_stop        = enicpmd_dev_rx_queue_stop,
+	.tx_queue_start       = enicpmd_dev_tx_queue_start,
+	.tx_queue_stop        = enicpmd_dev_tx_queue_stop,
+	.rx_queue_setup       = enicpmd_dev_rx_queue_setup,
+	.rx_queue_release     = enicpmd_dev_rx_queue_release,
+	.rx_queue_count       = NULL,
+	.rx_descriptor_done   = NULL,
+	.tx_queue_setup       = enicpmd_dev_tx_queue_setup,
+	.tx_queue_release     = enicpmd_dev_tx_queue_release,
+	.dev_led_on           = NULL,
+	.dev_led_off          = NULL,
+	.flow_ctrl_get        = NULL,
+	.flow_ctrl_set        = NULL,
+	.priority_flow_ctrl_set = NULL,
+	.mac_addr_add         = enicpmd_add_mac_addr,
+	.mac_addr_remove      = enicpmd_remove_mac_addr,
+	.fdir_add_signature_filter    = NULL,
+	.fdir_update_signature_filter = NULL,
+	.fdir_remove_signature_filter = NULL,
+	.fdir_infos_get               = enicpmd_fdir_info_get,
+	.fdir_add_perfect_filter      = enicpmd_fdir_add_perfect_filter,
+	.fdir_update_perfect_filter   = enicpmd_fdir_add_perfect_filter,
+	.fdir_remove_perfect_filter   = enicpmd_fdir_remove_perfect_filter,
+	.fdir_set_masks               = NULL,
+};
+
+struct enic *enicpmd_list_head = NULL;
+/* Initialize the driver
+ * It returns 0 on success.
+ */
+static int eth_enicpmd_dev_init(
+	__attribute__((unused))struct eth_driver *eth_drv,
+	struct rte_eth_dev *eth_dev)
+{
+	struct rte_pci_device *pdev;
+	struct rte_pci_addr *addr;
+	struct enic *enic = pmd_priv(eth_dev);
+
+	ENICPMD_FUNC_TRACE();
+
+	enic->rte_dev = eth_dev;
+	eth_dev->dev_ops = &enicpmd_eth_dev_ops;
+	eth_dev->rx_pkt_burst = &enicpmd_recv_pkts;
+	eth_dev->tx_pkt_burst = &enicpmd_xmit_pkts;
+
+	pdev = eth_dev->pci_dev;
+	enic->pdev = pdev;
+	addr = &pdev->addr;
+
+	snprintf(enic->bdf_name, ENICPMD_BDF_LENGTH, "%04x:%02x:%02x.%x",
+		addr->domain, addr->bus, addr->devid, addr->function);
+
+	return enic_probe(enic);
+}
+
+static struct eth_driver rte_enic_pmd = {
+	{
+		.name = "rte_enic_pmd",
+		.id_table = pci_id_enic_map,
+		.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
+	},
+	.eth_dev_init = eth_enicpmd_dev_init,
+	.dev_private_size = sizeof(struct enic),
+};
+
+/* Driver initialization routine.
+ * Invoked once at EAL init time.
+ * Register as the [Poll Mode] Driver of Cisco ENIC device.
+ */
+int rte_enic_pmd_init(const char *name __rte_unused,
+	const char *params __rte_unused)
+{
+	ENICPMD_FUNC_TRACE();
+
+	rte_eth_driver_register(&rte_enic_pmd);
+	return 0;
+}
+
+static struct rte_driver rte_enic_driver = {
+	.type = PMD_PDEV,
+	.init = rte_enic_pmd_init,
+};
+
+PMD_REGISTER_DRIVER(rte_enic_driver);
+
-- 
1.9.1