From patchwork Tue Aug 20 11:55:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Gong X-Patchwork-Id: 11103677 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 8C8BC1399 for ; Tue, 20 Aug 2019 11:55:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 60D3422CF7 for ; Tue, 20 Aug 2019 11:55:39 +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="Uy+wqag7"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="PAMxjOun" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729706AbfHTLzi (ORCPT ); Tue, 20 Aug 2019 07:55:38 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:49626 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727006AbfHTLzi (ORCPT ); Tue, 20 Aug 2019 07:55:38 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 6283360C5F; Tue, 20 Aug 2019 11:55:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1566302137; bh=wfgb6GZ2CDs1kZUOhQPBlZHljosC+rhic3FDWz2Cnec=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Uy+wqag7hKS4HFPqmjfUoDpdQyq09v/aS0B0T+/6AoOxK8H3Im7ZkUVcbnKPlqw9F vleDrXlVoyjUCgRPhJ8nrEBDr+aRhOn2B+sXPzRu+BXqKRdNOjEqIFRGt9heEqfmhA bQQXPd0t10gnPgIrobmk1zMvDDXusfjrgckpeTH8= 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 E4E2660F3D; Tue, 20 Aug 2019 11:55:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1566302135; bh=wfgb6GZ2CDs1kZUOhQPBlZHljosC+rhic3FDWz2Cnec=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PAMxjOunZVj/922DYYJ9yBO0if7uW8Z60DNQsGrZtkm/rwC7icDt8c+VAmHmxjsb2 38yPdR0C8KlsFjCteBDQwcDrFjyLLjlWNha18eaXS0klWtcSvM/1cJALnDsn238c/S 9iRu0d6/MyR6reRUeRY1l748Ip8mZ2KMsmhjDMdE= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E4E2660F3D 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 7/7] ath10k: enable napi on RX path for sdio Date: Tue, 20 Aug 2019 19:55:08 +0800 Message-Id: <1566302108-18219-8-git-send-email-wgong@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1566302108-18219-1-git-send-email-wgong@codeaurora.org> References: <1566302108-18219-1-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 --- drivers/net/wireless/ath/ath10k/htt.c | 2 ++ drivers/net/wireless/ath/ath10k/htt.h | 3 +++ drivers/net/wireless/ath/ath10k/htt_rx.c | 46 ++++++++++++++++++++++++++------ drivers/net/wireless/ath/ath10k/sdio.c | 33 +++++++++++++++++++++++ 4 files changed, 76 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htt.c b/drivers/net/wireless/ath/ath10k/htt.c index 38b5141..04ca13c 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 d2e5ea6..321bd2c 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; @@ -2299,6 +2301,7 @@ 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 8651a3b..7a01d12 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 = { @@ -3898,6 +3896,38 @@ 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; + + while (quota < budget) { + 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)); + quota++; + } + 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 4d6da04..e6ff129 100644 --- a/drivers/net/wireless/ath/ath10k/sdio.c +++ b/drivers/net/wireless/ath/ath10k/sdio.c @@ -1406,6 +1406,9 @@ 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); } @@ -1824,6 +1827,8 @@ 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. @@ -1962,6 +1967,9 @@ 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 @@ -2138,6 +2146,26 @@ 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 = 0; + + 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) { @@ -2163,6 +2191,8 @@ 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, @@ -2283,6 +2313,9 @@ 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);