From patchwork Wed Aug 25 09:37:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: P Praneesh X-Patchwork-Id: 503237 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 597AFC43214 for ; Wed, 25 Aug 2021 09:39:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4402F61100 for ; Wed, 25 Aug 2021 09:39:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239901AbhHYJkA (ORCPT ); Wed, 25 Aug 2021 05:40:00 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:14298 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239914AbhHYJj5 (ORCPT ); Wed, 25 Aug 2021 05:39:57 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1629884352; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=Wop+K36uB00RQ8N8wL7zesMhmTejxin3L+U++FK+EC0=; b=F9ei/vV6hMxtTHrUN2HtcwPh0XylPkuuqK9qwPqONgYcJGTZ4+JzaJIEfVcvNsSi8t9SBOT5 /SZGEQL0tePgsNQZoEOu7gTOQwxo0iJUprss/axpnMzx5J7m3RyIfW5j8a/fycBpIXnfLiVV lrLAhaCZjMpJPK5YP3fFUbgxV0M= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-east-1.postgun.com with SMTP id 61260fb81567234b8cbd5b33 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 25 Aug 2021 09:39:04 GMT Sender: ppranees=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0968CC43616; Wed, 25 Aug 2021 09:39:04 +0000 (UTC) Received: from ppranees-linux.qualcomm.com (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: ppranees) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5805DC4361A; Wed, 25 Aug 2021 09:39:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 5805DC4361A Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: P Praneesh To: kvalo@codeaurora.org Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, P Praneesh , Sriram R , Jouni Malinen Subject: [PATCH v2 07/12] ath11k: add branch predictors in process_rx Date: Wed, 25 Aug 2021 15:07:52 +0530 Message-Id: <1629884277-18759-8-git-send-email-ppranees@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1629884277-18759-1-git-send-email-ppranees@codeaurora.org> References: <1629884277-18759-1-git-send-email-ppranees@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org In datapath, add branch predictors where required in the process rx(). This protects high value rx path without having performance overhead. Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1 Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01695-QCAHKSWPL_SILICONZ-1 Co-developed-by: Sriram R Signed-off-by: Sriram R Signed-off-by: Jouni Malinen Signed-off-by: P Praneesh --- drivers/net/wireless/ath/ath11k/dp_rx.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index e105bdc..5d805881 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -2535,13 +2535,13 @@ static void ath11k_dp_rx_process_received_packets(struct ath11k_base *ab, rcu_read_lock(); ar = ab->pdevs[mac_id].ar; - if (!rcu_dereference(ab->pdevs_active[mac_id])) { + if (unlikely(!rcu_dereference(ab->pdevs_active[mac_id]))) { __skb_queue_purge(msdu_list); rcu_read_unlock(); return; } - if (test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags)) { + if (unlikely(test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags))) { __skb_queue_purge(msdu_list); rcu_read_unlock(); return; @@ -2549,7 +2549,7 @@ static void ath11k_dp_rx_process_received_packets(struct ath11k_base *ab, while ((msdu = __skb_dequeue(msdu_list))) { ret = ath11k_dp_rx_process_msdu(ar, msdu, msdu_list); - if (ret) { + if (unlikely(ret)) { ath11k_dbg(ab, ATH11K_DBG_DATA, "Unable to process msdu %d", ret); dev_kfree_skb_any(msdu); @@ -2604,7 +2604,7 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id, rx_ring = &ar->dp.rx_refill_buf_ring; spin_lock_bh(&rx_ring->idr_lock); msdu = idr_find(&rx_ring->bufs_idr, buf_id); - if (!msdu) { + if (unlikely(!msdu)) { ath11k_warn(ab, "frame rx with invalid buf_id %d\n", buf_id); spin_unlock_bh(&rx_ring->idr_lock); @@ -2623,8 +2623,8 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id, push_reason = FIELD_GET(HAL_REO_DEST_RING_INFO0_PUSH_REASON, desc->info0); - if (push_reason != - HAL_REO_DEST_RING_PUSH_REASON_ROUTING_INSTRUCTION) { + if (unlikely(push_reason != + HAL_REO_DEST_RING_PUSH_REASON_ROUTING_INSTRUCTION)) { dev_kfree_skb_any(msdu); ab->soc_stats.hal_reo_error[dp->reo_dst_ring[ring_id].ring_id]++; continue; @@ -2659,7 +2659,7 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id, * head pointer so that we can reap complete MPDU in the current * rx processing. */ - if (!done && ath11k_hal_srng_dst_num_free(ab, srng, true)) { + if (unlikely(!done && ath11k_hal_srng_dst_num_free(ab, srng, true))) { ath11k_hal_srng_access_end(ab, srng); goto try_again; } @@ -2668,7 +2668,7 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id, spin_unlock_bh(&srng->lock); - if (!total_msdu_reaped) + if (unlikely(!total_msdu_reaped)) goto exit; for (i = 0; i < ab->num_radios; i++) {