From patchwork Tue Jun 15 21:14:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jouni Malinen X-Patchwork-Id: 460879 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=ham 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 286AEC48BE5 for ; Tue, 15 Jun 2021 21:15:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F216661350 for ; Tue, 15 Jun 2021 21:15:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231311AbhFOVRG (ORCPT ); Tue, 15 Jun 2021 17:17:06 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:10563 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231346AbhFOVRG (ORCPT ); Tue, 15 Jun 2021 17:17:06 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1623791701; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=PweW9X1A3aOlLVXUb/xcnljlu5UdX6c93+2YDKIb3tU=; b=JwpxUPOeDt5y9+EMGQFqJBqKZpacyInuHOamIXaBa/6EdJM/LV7pcZS56CMqsMRSVmJAR2Nu OzWMkcryQh17evu8z1zH33BMMJDX8ZuL7z+EBwRDtBwfBWa5V9sKQTr+gBIY0tZ4Zgy5PjAh H+9RSz4UUCtC+Q0q5VvJGY5z4t0= 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-n03.prod.us-west-2.postgun.com with SMTP id 60c91851ed59bf69cc3725e3 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 15 Jun 2021 21:14:57 GMT Sender: jouni=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id D6B1BC4360C; Tue, 15 Jun 2021 21:14:57 +0000 (UTC) Received: from jouni.codeaurora.org (85-76-78-13-nat.elisa-mobile.fi [85.76.78.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jouni) by smtp.codeaurora.org (Postfix) with ESMTPSA id 2313AC43144; Tue, 15 Jun 2021 21:14:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 2313AC43144 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=jouni@codeaurora.org From: Jouni Malinen To: Kalle Valo Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, P Praneesh , Sriram R , Jouni Malinen Subject: [PATCH 11/12] ath11k: add branch predictors in dp_tx path Date: Wed, 16 Jun 2021 00:14:06 +0300 Message-Id: <20210615211407.92233-12-jouni@codeaurora.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210615211407.92233-1-jouni@codeaurora.org> References: <20210615211407.92233-1-jouni@codeaurora.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: P Praneesh Add branch prediciton in dp_tx code path in tx and tx completion handler. Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01734-QCAHKSWPL_SILICONZ-1 v2 Co-developed-by: Sriram R Signed-off-by: Sriram R Signed-off-by: P Praneesh Signed-off-by: Jouni Malinen --- drivers/net/wireless/ath/ath11k/dp_tx.c | 45 +++++++++++++------------ drivers/net/wireless/ath/ath11k/mac.c | 2 +- 2 files changed, 24 insertions(+), 23 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/dp_tx.c b/drivers/net/wireless/ath/ath11k/dp_tx.c index 8bba5234f81f..ab9ccf0eb274 100644 --- a/drivers/net/wireless/ath/ath11k/dp_tx.c +++ b/drivers/net/wireless/ath/ath11k/dp_tx.c @@ -95,11 +95,11 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, u8 ring_selector = 0, ring_map = 0; bool tcl_ring_retry; - if (test_bit(ATH11K_FLAG_CRASH_FLUSH, &ar->ab->dev_flags)) + if (unlikely(test_bit(ATH11K_FLAG_CRASH_FLUSH, &ar->ab->dev_flags))) return -ESHUTDOWN; - if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) && - !ieee80211_is_data(hdr->frame_control)) + if (unlikely(!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) && + !ieee80211_is_data(hdr->frame_control))) return -ENOTSUPP; pool_id = skb_get_queue_mapping(skb) & (ATH11K_HW_MAX_QUEUES - 1); @@ -130,7 +130,7 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, DP_TX_IDR_SIZE - 1, GFP_ATOMIC); spin_unlock_bh(&tx_ring->tx_idr_lock); - if (ret < 0) { + if (unlikely(ret < 0)) { if (ring_map == (BIT(DP_TCL_NUM_RING_MAX) - 1)) { atomic_inc(&ab->soc_stats.tx_err.misc_fail); return -ENOSPC; @@ -147,7 +147,7 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, ti.encap_type = ath11k_dp_tx_get_encap_type(arvif, skb); ti.meta_data_flags = arvif->tcl_metadata; - if (ti.encap_type == HAL_TCL_ENCAP_TYPE_RAW) { + if (unlikely(ti.encap_type == HAL_TCL_ENCAP_TYPE_RAW)) { if (skb_cb->flags & ATH11K_SKB_CIPHER_SET) { ti.encrypt_type = ath11k_dp_tx_get_encrypt_type(skb_cb->cipher); @@ -168,8 +168,8 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, ti.bss_ast_idx = arvif->ast_idx; ti.dscp_tid_tbl_idx = 0; - if (skb->ip_summed == CHECKSUM_PARTIAL && - ti.encap_type != HAL_TCL_ENCAP_TYPE_RAW) { + if (likely(skb->ip_summed == CHECKSUM_PARTIAL && + ti.encap_type != HAL_TCL_ENCAP_TYPE_RAW)) { ti.flags0 |= FIELD_PREP(HAL_TCL_DATA_CMD_INFO1_IP4_CKSUM_EN, 1) | FIELD_PREP(HAL_TCL_DATA_CMD_INFO1_UDP4_CKSUM_EN, 1) | FIELD_PREP(HAL_TCL_DATA_CMD_INFO1_UDP6_CKSUM_EN, 1) | @@ -206,7 +206,7 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, } ti.paddr = dma_map_single(ab->dev, skb->data, skb->len, DMA_TO_DEVICE); - if (dma_mapping_error(ab->dev, ti.paddr)) { + if (unlikely(dma_mapping_error(ab->dev, ti.paddr))) { atomic_inc(&ab->soc_stats.tx_err.misc_fail); ath11k_warn(ab, "failed to DMA map data Tx buffer\n"); ret = -ENOMEM; @@ -226,7 +226,7 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, ath11k_hal_srng_access_begin(ab, tcl_ring); hal_tcl_desc = (void *)ath11k_hal_srng_src_get_next_entry(ab, tcl_ring); - if (!hal_tcl_desc) { + if (unlikely(!hal_tcl_desc)) { /* NOTE: It is highly unlikely we'll be running out of tcl_ring * desc because the desc is directly enqueued onto hw queue. */ @@ -240,8 +240,8 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif, * checking this ring earlier for each pkt tx. * Restart ring selection if some rings are not checked yet. */ - if (ring_map != (BIT(DP_TCL_NUM_RING_MAX) - 1) && - !ar->ab->hw_params.tcl_0_only) { + if (unlikely(ring_map != (BIT(DP_TCL_NUM_RING_MAX) - 1) && + !ar->ab->hw_params.tcl_0_only)) { tcl_ring_retry = true; ring_selector++; } @@ -322,7 +322,7 @@ ath11k_dp_tx_htt_tx_complete_buf(struct ath11k_base *ab, spin_lock_bh(&tx_ring->tx_idr_lock); msdu = idr_find(&tx_ring->txbuf_idr, ts->msdu_id); - if (!msdu) { + if (unlikely(!msdu)) { ath11k_warn(ab, "htt tx completion for unknown msdu_id %d\n", ts->msdu_id); spin_unlock_bh(&tx_ring->tx_idr_lock); @@ -432,12 +432,12 @@ static void ath11k_dp_tx_complete_msdu(struct ath11k *ar, rcu_read_lock(); - if (!rcu_dereference(ab->pdevs_active[ar->pdev_idx])) { + if (unlikely(!rcu_dereference(ab->pdevs_active[ar->pdev_idx]))) { dev_kfree_skb_any(msdu); goto exit; } - if (!skb_cb->vif) { + if (unlikely(!skb_cb->vif)) { dev_kfree_skb_any(msdu); goto exit; } @@ -460,7 +460,7 @@ static void ath11k_dp_tx_complete_msdu(struct ath11k *ar, (info->flags & IEEE80211_TX_CTL_NO_ACK)) info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; - if (ath11k_debugfs_is_extd_tx_stats_enabled(ar)) { + if (unlikely(ath11k_debugfs_is_extd_tx_stats_enabled(ar))) { if (ts->flags & HAL_TX_STATUS_FLAGS_FIRST_MSDU) { if (ar->last_ppdu_id == 0) { ar->last_ppdu_id = ts->ppdu_id; @@ -500,11 +500,11 @@ static inline void ath11k_dp_tx_status_parse(struct ath11k_base *ab, { ts->buf_rel_source = FIELD_GET(HAL_WBM_RELEASE_INFO0_REL_SRC_MODULE, desc->info0); - if (ts->buf_rel_source != HAL_WBM_REL_SRC_MODULE_FW && - ts->buf_rel_source != HAL_WBM_REL_SRC_MODULE_TQM) + if (unlikely(ts->buf_rel_source != HAL_WBM_REL_SRC_MODULE_FW && + ts->buf_rel_source != HAL_WBM_REL_SRC_MODULE_TQM)) return; - if (ts->buf_rel_source == HAL_WBM_REL_SRC_MODULE_FW) + if (unlikely(ts->buf_rel_source == HAL_WBM_REL_SRC_MODULE_FW)) return; ts->status = FIELD_GET(HAL_WBM_RELEASE_INFO0_TQM_RELEASE_REASON, @@ -551,8 +551,9 @@ void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id) ATH11K_TX_COMPL_NEXT(tx_ring->tx_status_head); } - if ((ath11k_hal_srng_dst_peek(ab, status_ring) != NULL) && - (ATH11K_TX_COMPL_NEXT(tx_ring->tx_status_head) == tx_ring->tx_status_tail)) { + if (unlikely((ath11k_hal_srng_dst_peek(ab, status_ring) != NULL) && + (ATH11K_TX_COMPL_NEXT(tx_ring->tx_status_head) == + tx_ring->tx_status_tail))) { /* TODO: Process pending tx_status messages when kfifo_is_full() */ ath11k_warn(ab, "Unable to process some of the tx_status ring desc because status_fifo is full\n"); } @@ -575,7 +576,7 @@ void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id) mac_id = FIELD_GET(DP_TX_DESC_ID_MAC_ID, desc_id); msdu_id = FIELD_GET(DP_TX_DESC_ID_MSDU_ID, desc_id); - if (ts.buf_rel_source == HAL_WBM_REL_SRC_MODULE_FW) { + if (unlikely(ts.buf_rel_source == HAL_WBM_REL_SRC_MODULE_FW)) { ath11k_dp_tx_process_htt_tx_complete(ab, (void *)tx_status, mac_id, msdu_id, @@ -585,7 +586,7 @@ void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id) spin_lock_bh(&tx_ring->tx_idr_lock); msdu = idr_find(&tx_ring->txbuf_idr, msdu_id); - if (!msdu) { + if (unlikely(!msdu)) { ath11k_warn(ab, "tx completion for unknown msdu_id %d\n", msdu_id); spin_unlock_bh(&tx_ring->tx_idr_lock); diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index eb52332dbe3f..32e90b13fac0 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -4333,7 +4333,7 @@ static void ath11k_mac_op_tx(struct ieee80211_hw *hw, } ret = ath11k_dp_tx(ar, arvif, skb); - if (ret) { + if (unlikely(ret)) { ath11k_warn(ar->ab, "failed to transmit frame %d\n", ret); ieee80211_free_txskb(ar->hw, skb); }