From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDBE4C433EF for ; Mon, 10 Jan 2022 09:00:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242599AbiAJJAd (ORCPT ); Mon, 10 Jan 2022 04:00:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242214AbiAJI60 (ORCPT ); Mon, 10 Jan 2022 03:58:26 -0500 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A03AC034004 for ; Mon, 10 Jan 2022 00:58:26 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id s1so25356080wra.6 for ; Mon, 10 Jan 2022 00:58:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=30uDwdMU4+NZJId6kH+K386QkFdKEcjUqwjVlz0QiGI=; b=KprInw2zUZDxT+u3RZiuvBHm4nDQTH3QY7cco9eAfAG6yNciIwq6wmU1M0D4lgg+wt 5R60X+IjOqOKrKeI+cyvroAg+o+9WwLmS4irEavhWQQkmRI//XLfBW1oz1cnHRND/YCk dNRncD/WTQxA6vYTmr9+6Q/YSdSisYJ1SQATIgLZvGsXVLKktnj9zjpnEm5Ik0XBKtfy CRKCQNtEcZ0qt7ZBtRARg32pWG3aFBMP3Cc+QZsBnoBkm/ZRmTagZ5gKCWXpt7LZvfGJ 3LzSapwa49t5GDlpGTMPfBSPzkiGlEzNfDH9tsCV40qrgKXDKLzcunDtIq5BUPdDpwmr lP8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :content-transfer-encoding:in-reply-to:user-agent; bh=30uDwdMU4+NZJId6kH+K386QkFdKEcjUqwjVlz0QiGI=; b=LyX5mk4lFJXPxvYrjkcDN/Dlq/yWy+Sxid7OCmg+syko44NXx6KvggwSXGpdPqRWPl Rwh72LVdYOz7sQMvBc3+He37bPfgUiJ5gl1U5BuJsyI00iWfoaDYb4YOATK9oN0x/dLy ijsqxolbYC71nfcA7KXeCQieVmBHosBnoUY3Z3n40JoCjOBKjzFb68CSwUmbRbcEBN31 Y433ewyGZ385HkEy8QNixYZ1CiDdzqAFOR6kinLLUYdD1fkBvyZhbUI125D2o7/uEOzd xQgU91eCZlNNehAy0f327zWgkPTmKOJo2+mq38CrZ6NgQ+QmwFvxCsfeHYZHES32M8+v skwg== X-Gm-Message-State: AOAM5338nnai6XejH2LmVzpKKqUTLdrLkP5n/9JGTzlL9sLI/VTbf1u4 /JC64UNEiFs1CF4Qvuol1pc= X-Google-Smtp-Source: ABdhPJwlZ30E1GRnxb8pj7HVb/1P5za/nsMCemSOj+DtjbTr3cWfgPFCTgLGn1+gElm0nnQAgKaPMA== X-Received: by 2002:a5d:4685:: with SMTP id u5mr1673344wrq.588.1641805104869; Mon, 10 Jan 2022 00:58:24 -0800 (PST) Received: from gmail.com ([81.168.73.77]) by smtp.gmail.com with ESMTPSA id d22sm6074904wmq.17.2022.01.10.00.58.23 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 10 Jan 2022 00:58:24 -0800 (PST) Date: Mon, 10 Jan 2022 08:58:21 +0000 From: Martin Habets To: =?iso-8859-1?B?zfFpZ28=?= Huguet , davem@davemloft.net, kuba@kernel.org Cc: ecree.xilinx@gmail.com, netdev@vger.kernel.org, dinang@xilinx.com Subject: [PATCH net-next] sfc: The size of the RX recycle ring should be more flexible Message-ID: <20220110085820.zi73go4etyyrkixr@gmail.com> Mail-Followup-To: =?iso-8859-1?B?zfFpZ28=?= Huguet , davem@davemloft.net, kuba@kernel.org, ecree.xilinx@gmail.com, netdev@vger.kernel.org, dinang@xilinx.com References: <20211120083107.z2cm7tkl2rsri2v7@gmail.com> <20220102092207.rxz7kpjii4ermnfo@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20220102092207.rxz7kpjii4ermnfo@gmail.com> User-Agent: NeoMutt/20170113 (1.7.2) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Ideally the size would depend on the link speed, but the recycle ring is created when the interface is brought up before the driver knows the link speed. So size it for the maximum speed of a given NIC. PowerPC is only supported on SFN7xxx and SFN8xxx NICs. With this patch on a 40G NIC the number of calls to alloc_pages and friends went down from about 18% to under 2%. On a 10G NIC the number of calls to alloc_pages and friends went down from about 15% to 0 (perf did not capture any calls during the 60 second test). On a 100G NIC the number of calls to alloc_pages and friends went down from about 23% to 4%. Reported-by: Íñigo Huguet Signed-off-by: Martin Habets --- drivers/net/ethernet/sfc/ef10.c | 31 +++++++++++++++++++++++++++++++ drivers/net/ethernet/sfc/ef100_nic.c | 9 +++++++++ drivers/net/ethernet/sfc/net_driver.h | 2 ++ drivers/net/ethernet/sfc/nic_common.h | 5 +++++ drivers/net/ethernet/sfc/rx_common.c | 18 +----------------- drivers/net/ethernet/sfc/rx_common.h | 6 ++++++ drivers/net/ethernet/sfc/siena.c | 8 ++++++++ 7 files changed, 62 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c index cf366ed2557c..dc3f95503d9c 100644 --- a/drivers/net/ethernet/sfc/ef10.c +++ b/drivers/net/ethernet/sfc/ef10.c @@ -3990,6 +3990,35 @@ static unsigned int ef10_check_caps(const struct efx_nic *efx, } } +static unsigned int efx_ef10_recycle_ring_size(const struct efx_nic *efx) +{ + unsigned int ret; + + /* There is no difference between PFs and VFs. The side is based on + * the maximum link speed of a given NIC. + */ + switch (efx->pci_dev->device & 0xfff) { + case 0x0903: /* Farmingdale can do up to 10G */ +#ifdef CONFIG_PPC64 + ret = 4 * EFX_RECYCLE_RING_SIZE_10G; +#else + ret = EFX_RECYCLE_RING_SIZE_10G; +#endif + break; + case 0x0923: /* Greenport can do up to 40G */ + case 0x0a03: /* Medford can do up to 40G */ +#ifdef CONFIG_PPC64 + ret = 16 * EFX_RECYCLE_RING_SIZE_10G; +#else + ret = 4 * EFX_RECYCLE_RING_SIZE_10G; +#endif + break; + default: /* Medford2 can do up to 100G */ + ret = 10 * EFX_RECYCLE_RING_SIZE_10G; + } + return ret; +} + #define EF10_OFFLOAD_FEATURES \ (NETIF_F_IP_CSUM | \ NETIF_F_HW_VLAN_CTAG_FILTER | \ @@ -4106,6 +4135,7 @@ const struct efx_nic_type efx_hunt_a0_vf_nic_type = { .check_caps = ef10_check_caps, .print_additional_fwver = efx_ef10_print_additional_fwver, .sensor_event = efx_mcdi_sensor_event, + .rx_recycle_ring_size = efx_ef10_recycle_ring_size, }; const struct efx_nic_type efx_hunt_a0_nic_type = { @@ -4243,4 +4273,5 @@ const struct efx_nic_type efx_hunt_a0_nic_type = { .check_caps = ef10_check_caps, .print_additional_fwver = efx_ef10_print_additional_fwver, .sensor_event = efx_mcdi_sensor_event, + .rx_recycle_ring_size = efx_ef10_recycle_ring_size, }; diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c index f79b14a119ae..a07cbf45a326 100644 --- a/drivers/net/ethernet/sfc/ef100_nic.c +++ b/drivers/net/ethernet/sfc/ef100_nic.c @@ -23,6 +23,7 @@ #include "ef100_rx.h" #include "ef100_tx.h" #include "ef100_netdev.h" +#include "rx_common.h" #define EF100_MAX_VIS 4096 #define EF100_NUM_MCDI_BUFFERS 1 @@ -696,6 +697,12 @@ static unsigned int ef100_check_caps(const struct efx_nic *efx, } } +static unsigned int efx_ef100_recycle_ring_size(const struct efx_nic *efx) +{ + /* Maximum link speed for Riverhead is 100G */ + return 10 * EFX_RECYCLE_RING_SIZE_10G; +} + /* NIC level access functions */ #define EF100_OFFLOAD_FEATURES (NETIF_F_HW_CSUM | NETIF_F_RXCSUM | \ @@ -770,6 +777,7 @@ const struct efx_nic_type ef100_pf_nic_type = { .rx_push_rss_context_config = efx_mcdi_rx_push_rss_context_config, .rx_pull_rss_context_config = efx_mcdi_rx_pull_rss_context_config, .rx_restore_rss_contexts = efx_mcdi_rx_restore_rss_contexts, + .rx_recycle_ring_size = efx_ef100_recycle_ring_size, .reconfigure_mac = ef100_reconfigure_mac, .reconfigure_port = efx_mcdi_port_reconfigure, @@ -849,6 +857,7 @@ const struct efx_nic_type ef100_vf_nic_type = { .rx_pull_rss_config = efx_mcdi_rx_pull_rss_config, .rx_push_rss_config = efx_mcdi_pf_rx_push_rss_config, .rx_restore_rss_contexts = efx_mcdi_rx_restore_rss_contexts, + .rx_recycle_ring_size = efx_ef100_recycle_ring_size, .reconfigure_mac = ef100_reconfigure_mac, .test_nvram = efx_new_mcdi_nvram_test_all, diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index cc15ee8812d9..c75dc75e2857 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -1282,6 +1282,7 @@ struct efx_udp_tunnel { * @udp_tnl_has_port: Check if a port has been added as UDP tunnel * @print_additional_fwver: Dump NIC-specific additional FW version info * @sensor_event: Handle a sensor event from MCDI + * @rx_recycle_ring_size: Size of the RX recycle ring * @revision: Hardware architecture revision * @txd_ptr_tbl_base: TX descriptor ring base address * @rxd_ptr_tbl_base: RX descriptor ring base address @@ -1460,6 +1461,7 @@ struct efx_nic_type { size_t (*print_additional_fwver)(struct efx_nic *efx, char *buf, size_t len); void (*sensor_event)(struct efx_nic *efx, efx_qword_t *ev); + unsigned int (*rx_recycle_ring_size)(const struct efx_nic *efx); int revision; unsigned int txd_ptr_tbl_base; diff --git a/drivers/net/ethernet/sfc/nic_common.h b/drivers/net/ethernet/sfc/nic_common.h index b9cafe9cd568..0cef35c0c559 100644 --- a/drivers/net/ethernet/sfc/nic_common.h +++ b/drivers/net/ethernet/sfc/nic_common.h @@ -195,6 +195,11 @@ static inline void efx_sensor_event(struct efx_nic *efx, efx_qword_t *ev) efx->type->sensor_event(efx, ev); } +static inline unsigned int efx_rx_recycle_ring_size(const struct efx_nic *efx) +{ + return efx->type->rx_recycle_ring_size(efx); +} + /* Some statistics are computed as A - B where A and B each increase * linearly with some hardware counter(s) and the counters are read * asynchronously. If the counters contributing to B are always read diff --git a/drivers/net/ethernet/sfc/rx_common.c b/drivers/net/ethernet/sfc/rx_common.c index 633ca77a26fd..1b22c7be0088 100644 --- a/drivers/net/ethernet/sfc/rx_common.c +++ b/drivers/net/ethernet/sfc/rx_common.c @@ -23,13 +23,6 @@ module_param(rx_refill_threshold, uint, 0444); MODULE_PARM_DESC(rx_refill_threshold, "RX descriptor ring refill threshold (%)"); -/* Number of RX buffers to recycle pages for. When creating the RX page recycle - * ring, this number is divided by the number of buffers per page to calculate - * the number of pages to store in the RX page recycle ring. - */ -#define EFX_RECYCLE_RING_SIZE_IOMMU 4096 -#define EFX_RECYCLE_RING_SIZE_NOIOMMU (2 * EFX_RX_PREFERRED_BATCH) - /* RX maximum head room required. * * This must be at least 1 to prevent overflow, plus one packet-worth @@ -141,16 +134,7 @@ static void efx_init_rx_recycle_ring(struct efx_rx_queue *rx_queue) unsigned int bufs_in_recycle_ring, page_ring_size; struct efx_nic *efx = rx_queue->efx; - /* Set the RX recycle ring size */ -#ifdef CONFIG_PPC64 - bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU; -#else - if (iommu_present(&pci_bus_type)) - bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU; - else - bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_NOIOMMU; -#endif /* CONFIG_PPC64 */ - + bufs_in_recycle_ring = efx_rx_recycle_ring_size(efx); page_ring_size = roundup_pow_of_two(bufs_in_recycle_ring / efx->rx_bufs_per_page); rx_queue->page_ring = kcalloc(page_ring_size, diff --git a/drivers/net/ethernet/sfc/rx_common.h b/drivers/net/ethernet/sfc/rx_common.h index 207ccd8ba062..fbd2769307f9 100644 --- a/drivers/net/ethernet/sfc/rx_common.h +++ b/drivers/net/ethernet/sfc/rx_common.h @@ -18,6 +18,12 @@ #define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \ EFX_RX_USR_BUF_SIZE) +/* Number of RX buffers to recycle pages for. When creating the RX page recycle + * ring, this number is divided by the number of buffers per page to calculate + * the number of pages to store in the RX page recycle ring. + */ +#define EFX_RECYCLE_RING_SIZE_10G 256 + static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf) { return page_address(buf->page) + buf->page_offset; diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c index 16347a6d0c47..ce3060e15b54 100644 --- a/drivers/net/ethernet/sfc/siena.c +++ b/drivers/net/ethernet/sfc/siena.c @@ -25,6 +25,7 @@ #include "mcdi_port_common.h" #include "selftest.h" #include "siena_sriov.h" +#include "rx_common.h" /* Hardware control for SFC9000 family including SFL9021 (aka Siena). */ @@ -958,6 +959,12 @@ static unsigned int siena_check_caps(const struct efx_nic *efx, return 0; } +static unsigned int efx_siena_recycle_ring_size(const struct efx_nic *efx) +{ + /* Maximum link speed is 10G */ + return EFX_RECYCLE_RING_SIZE_10G; +} + /************************************************************************** * * Revision-dependent attributes used by efx.c and nic.c @@ -1098,4 +1105,5 @@ const struct efx_nic_type siena_a0_nic_type = { .rx_hash_key_size = 16, .check_caps = siena_check_caps, .sensor_event = efx_mcdi_sensor_event, + .rx_recycle_ring_size = efx_siena_recycle_ring_size, };