From patchwork Wed Aug 28 13:16:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Gong X-Patchwork-Id: 11122183 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 87ACA13B1 for ; Thu, 29 Aug 2019 17:50:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5A9F022CF5 for ; Thu, 29 Aug 2019 17:50:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="k/y2k1FF"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="KcEHXpGu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727929AbfH2Rur (ORCPT ); Thu, 29 Aug 2019 13:50:47 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:43962 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727234AbfH2Ruq (ORCPT ); Thu, 29 Aug 2019 13:50:46 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 300A6625F5; Thu, 29 Aug 2019 17:36:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1567100368; bh=mjqi6ia2k3/S9ChbSRXSChEhQXEcvudF1ncvY00WPVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k/y2k1FFSrIpebRHzB5q6Z3pdhqQYI+UBS9sF2WHxpxQVAc5nMgDEyC/YSsO6cDF8 4f5Er55mdG6apOKE3pARDsrjqKY3Jub7mBGGCgJbWFgFj1GpLqqYNKr8hZJFmVc189 FvW0g1gMyxb6AIp23NUh1wGljgEWO5G5rzBEhvEo= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from wgong-HP-Z240-SFF-Workstation.qca.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wgong@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7646588A2D; Wed, 28 Aug 2019 13:16:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1566998206; bh=mjqi6ia2k3/S9ChbSRXSChEhQXEcvudF1ncvY00WPVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KcEHXpGubmJlyujQosZzzy+wNq5m+7rGx8g2gdM7wvMX+OrKEfYMDL1z8fgLzbVEN 3Sry8af+bH/VJlYBEmywEnwoLc74oI2O44pp5WH/wdMYtYzFwqGy8KM2kEHONmeuWk b5+VzeOU8IXBkNffK6JaQ3KswmBgumLQQ5CMNa1A= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 7646588A2D Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=wgong@codeaurora.org From: Wen Gong To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org Subject: [PATCH v3 8/8] ath10k: enable napi on RX path for sdio Date: Wed, 28 Aug 2019 21:16:17 +0800 Message-Id: <1566998177-2658-9-git-send-email-wgong@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1566998177-2658-1-git-send-email-wgong@codeaurora.org> References: <1566998177-2658-1-git-send-email-wgong@codeaurora.org> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org For tcp RX, the quantity of tcp acks to remote is 1/2 of the quantity of tcp data from remote, then it will have many small length packets on TX path of sdio bus, then it reduce the RX packets's bandwidth of tcp. This patch enable napi on RX path, then the RX packet of tcp will not feed to tcp stack immeditely from mac80211 since GRO is enabled by default, it will feed to tcp stack after napi complete, if rx bundle is enabled, then it will feed to tcp stack one time for each bundle of RX. For example, RX bundle size is 32, then tcp stack will receive one large length packet, its length is neary 1500*32, then tcp stack will send a tcp ack for this large packet, this will reduce the tcp acks ratio from 1/2 to 1/32. This results in significant performance improvement for tcp RX. Tcp rx throughout is 240Mbps without this patch, and it arrive 390Mbps with this patch. The cpu usage has no obvious difference with and without NAPI. call stack for each RX packet on GRO path: (skb length is about 1500 bytes) skb_gro_receive ([kernel.kallsyms]) tcp4_gro_receive ([kernel.kallsyms]) inet_gro_receive ([kernel.kallsyms]) dev_gro_receive ([kernel.kallsyms]) napi_gro_receive ([kernel.kallsyms]) ieee80211_deliver_skb ([mac80211]) ieee80211_rx_handlers ([mac80211]) ieee80211_prepare_and_rx_handle ([mac80211]) ieee80211_rx_napi ([mac80211]) ath10k_htt_rx_proc_rx_ind_hl ([ath10k_core]) ath10k_htt_rx_pktlog_completion_handler ([ath10k_core]) ath10k_sdio_napi_poll ([ath10k_sdio]) net_rx_action ([kernel.kallsyms]) softirqentry_text_start ([kernel.kallsyms]) do_softirq ([kernel.kallsyms]) call stack for napi complete and send tcp ack from tcp stack: (skb length is about 1500*32 bytes) _tcp_ack_snd_check ([kernel.kallsyms]) tcp_v4_do_rcv ([kernel.kallsyms]) tcp_v4_rcv ([kernel.kallsyms]) local_deliver_finish ([kernel.kallsyms]) ip_local_deliver ([kernel.kallsyms]) ip_rcv_finish ([kernel.kallsyms]) ip_rcv ([kernel.kallsyms]) netif_receive_skb_core ([kernel.kallsyms]) netif_receive_skb_one_core([kernel.kallsyms]) netif_receive_skb ([kernel.kallsyms]) netif_receive_skb_internal ([kernel.kallsyms]) napi_gro_complete ([kernel.kallsyms]) napi_gro_flush ([kernel.kallsyms]) napi_complete_done ([kernel.kallsyms]) ath10k_sdio_napi_poll ([ath10k_sdio]) net_rx_action ([kernel.kallsyms]) __softirqentry_text_start ([kernel.kallsyms]) do_softirq ([kernel.kallsyms]) Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00007-QCARMSWP-1. Signed-off-by: Wen Gong --- v2:no change v3:change some code style drivers/net/wireless/ath/ath10k/htt.c | 2 ++ drivers/net/wireless/ath/ath10k/htt.h | 3 +++ drivers/net/wireless/ath/ath10k/htt_rx.c | 45 ++++++++++++++++++++++++++------ drivers/net/wireless/ath/ath10k/sdio.c | 33 +++++++++++++++++++++++ 4 files changed, 75 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htt.c b/drivers/net/wireless/ath/ath10k/htt.c index 127b4e4..f69346f 100644 --- a/drivers/net/wireless/ath/ath10k/htt.c +++ b/drivers/net/wireless/ath/ath10k/htt.c @@ -157,6 +157,8 @@ int ath10k_htt_connect(struct ath10k_htt *htt) htt->eid = conn_resp.eid; + skb_queue_head_init(&htt->rx_indication_head); + if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) { ep = &ar->htc.endpoint[htt->eid]; ath10k_htc_setup_tx_req(ep); diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h index 4851a2e..462a25b 100644 --- a/drivers/net/wireless/ath/ath10k/htt.h +++ b/drivers/net/wireless/ath/ath10k/htt.h @@ -1879,6 +1879,8 @@ struct ath10k_htt { struct ath10k *ar; enum ath10k_htc_ep_id eid; + struct sk_buff_head rx_indication_head; + u8 target_version_major; u8 target_version_minor; struct completion target_version_received; @@ -2298,6 +2300,7 @@ int ath10k_htt_tx_mgmt_inc_pending(struct ath10k_htt *htt, bool is_mgmt, void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar, struct sk_buff *skb); int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget); +int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget); void ath10k_htt_set_tx_ops(struct ath10k_htt *htt); void ath10k_htt_set_rx_ops(struct ath10k_htt *htt); #endif diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index 09825b1..71b4afe 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -2263,7 +2263,7 @@ static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt, if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) rx_status->flag |= RX_FLAG_MMIC_ERROR; - ieee80211_rx_ni(ar->hw, skb); + ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi); /* We have delivered the skb to the upper layers (mac80211) so we * must not free it. @@ -3664,14 +3664,12 @@ bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb) break; } case HTT_T2H_MSG_TYPE_RX_IND: - if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) - return ath10k_htt_rx_proc_rx_ind_hl(htt, - &resp->rx_ind_hl, - skb, - HTT_RX_PN_CHECK, - HTT_RX_NON_TKIP_MIC); - else + if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) { ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind); + } else { + skb_queue_tail(&htt->rx_indication_head, skb); + return false; + } break; case HTT_T2H_MSG_TYPE_PEER_MAP: { struct htt_peer_map_event ev = { @@ -3894,6 +3892,37 @@ static int ath10k_htt_rx_deliver_msdu(struct ath10k *ar, int quota, int budget) return quota; } +int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget) +{ + struct htt_resp *resp; + struct ath10k_htt *htt = &ar->htt; + struct sk_buff *skb; + bool release; + int quota = 0; + + for (quota = 0; quota < budget; quota++) { + skb = skb_dequeue(&htt->rx_indication_head); + if (!skb) + break; + + resp = (struct htt_resp *)skb->data; + + release = ath10k_htt_rx_proc_rx_ind_hl(htt, + &resp->rx_ind_hl, + skb, + HTT_RX_PN_CHECK, + HTT_RX_NON_TKIP_MIC); + + if (release) + dev_kfree_skb_any(skb); + + ath10k_dbg(ar, ATH10K_DBG_HTT, "rx indication poll pending count:%d\n", + skb_queue_len(&htt->rx_indication_head)); + } + return quota; +} +EXPORT_SYMBOL(ath10k_htt_rx_hl_indication); + int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget) { struct ath10k_htt *htt = &ar->htt; diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c index c641f1b..23e92ea 100644 --- a/drivers/net/wireless/ath/ath10k/sdio.c +++ b/drivers/net/wireless/ath/ath10k/sdio.c @@ -1400,6 +1400,9 @@ static void ath10k_rx_indication_async_work(struct work_struct *work) spin_lock_bh(&ar_sdio->wr_async_lock_rx); } + if (test_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags)) + napi_schedule(&ar->napi); + spin_unlock_bh(&ar_sdio->wr_async_lock_rx); } @@ -1813,6 +1816,8 @@ static int ath10k_sdio_hif_start(struct ath10k *ar) struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar); int ret; + napi_enable(&ar->napi); + /* Sleep 20 ms before HIF interrupts are disabled. * This will give target plenty of time to process the BMI done * request before interrupts are disabled. @@ -1951,6 +1956,9 @@ static void ath10k_sdio_hif_stop(struct ath10k *ar) } spin_unlock_bh(&ar_sdio->wr_async_lock); + + napi_synchronize(&ar->napi); + napi_disable(&ar->napi); } #ifdef CONFIG_PM @@ -2127,6 +2135,26 @@ static SIMPLE_DEV_PM_OPS(ath10k_sdio_pm_ops, ath10k_sdio_pm_suspend, #endif /* CONFIG_PM_SLEEP */ +static int ath10k_sdio_napi_poll(struct napi_struct *ctx, int budget) +{ + struct ath10k *ar = container_of(ctx, struct ath10k, napi); + int done; + + done = ath10k_htt_rx_hl_indication(ar, budget); + ath10k_dbg(ar, ATH10K_DBG_SDIO, "napi poll: done: %d,budget:%d\n", done, budget); + + if (done < budget) + napi_complete_done(ctx, done); + + return done; +} + +void ath10k_sdio_init_napi(struct ath10k *ar) +{ + netif_napi_add(&ar->napi_dev, &ar->napi, ath10k_sdio_napi_poll, + ATH10K_NAPI_BUDGET); +} + static int ath10k_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id) { @@ -2152,6 +2180,8 @@ static int ath10k_sdio_probe(struct sdio_func *func, return -ENOMEM; } + ath10k_sdio_init_napi(ar); + ath10k_dbg(ar, ATH10K_DBG_BOOT, "sdio new func %d vendor 0x%x device 0x%x block 0x%x/0x%x\n", func->num, func->vendor, func->device, @@ -2272,6 +2302,9 @@ static void ath10k_sdio_remove(struct sdio_func *func) func->num, func->vendor, func->device); ath10k_core_unregister(ar); + + netif_napi_del(&ar->napi); + ath10k_core_destroy(ar); flush_workqueue(ar_sdio->workqueue);