From patchwork Wed Dec 15 17:38:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 524491 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 C9B5AC433F5 for ; Wed, 15 Dec 2021 17:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234979AbhLORiw (ORCPT ); Wed, 15 Dec 2021 12:38:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234766AbhLORiw (ORCPT ); Wed, 15 Dec 2021 12:38:52 -0500 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1C0DC06173F for ; Wed, 15 Dec 2021 09:38:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=No23zpZ5I2BhKviUpveWFlAOy4WRUk+ss6gHkGcTI1c=; b=tWvLCz2qDYUyoO7a1atydIPBwn CsBncTJE6GcJfG1bQDiVjyEKCyUVGvnEInuK2sUSnU79USiTWQw7asEXcevaZY0uPTleR2LycMpkY 1qNsHKqN1NDzlA9Ff8GKEtpR9EAFzgSuJ4ihgNCILcTeQqze2KZEhu+41x4ySTtbrCBM=; Received: from p54ae911a.dip0.t-ipconnect.de ([84.174.145.26] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1mxYEr-0000He-Lv for linux-wireless@vger.kernel.org; Wed, 15 Dec 2021 18:38:49 +0100 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 2/3] mt76: mt7915: process txfree and txstatus without allocating skbs Date: Wed, 15 Dec 2021 18:38:38 +0100 Message-Id: <20211215173839.20853-2-nbd@nbd.name> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211215173839.20853-1-nbd@nbd.name> References: <20211215173839.20853-1-nbd@nbd.name> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Reduces pressure on the memory allocator Signed-off-by: Felix Fietkau --- .../net/wireless/mediatek/mt76/mt7915/mac.c | 36 +++++++++++++++---- .../wireless/mediatek/mt76/mt7915/mt7915.h | 1 + .../net/wireless/mediatek/mt76/mt7915/pci.c | 1 + 3 files changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index a1556fe2f421..f25b36ff31ff 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -1373,15 +1373,16 @@ mt7915_txwi_free(struct mt7915_dev *dev, struct mt76_txwi_cache *t, } static void -mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb) +mt7915_mac_tx_free(struct mt7915_dev *dev, void *data, int len) { - struct mt7915_tx_free *free = (struct mt7915_tx_free *)skb->data; + struct mt7915_tx_free *free = (struct mt7915_tx_free *)data; struct mt76_dev *mdev = &dev->mt76; struct mt76_phy *mphy_ext = mdev->phy2; struct mt76_txwi_cache *txwi; struct ieee80211_sta *sta = NULL; LIST_HEAD(free_list); - struct sk_buff *tmp; + struct sk_buff *skb, *tmp; + void *end = data + len; u8 i, count; bool wake = false; @@ -1399,6 +1400,9 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb) * Should avoid accessing WTBL to get Tx airtime, and use it instead. */ count = FIELD_GET(MT_TX_FREE_MSDU_CNT, le16_to_cpu(free->ctrl)); + if (WARN_ON_ONCE((void *)&free->info[count] > end)) + return; + for (i = 0; i < count; i++) { u32 msdu, info = le32_to_cpu(free->info[i]); @@ -1441,8 +1445,6 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb) mt76_worker_schedule(&dev->mt76.tx_worker); - napi_consume_skb(skb, 1); - list_for_each_entry_safe(skb, tmp, &free_list, list) { skb_list_del_init(skb); napi_consume_skb(skb, 1); @@ -1617,6 +1619,27 @@ static void mt7915_mac_add_txs(struct mt7915_dev *dev, void *data) rcu_read_unlock(); } +bool mt7915_rx_check(struct mt76_dev *mdev, void *data, int len) +{ + struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76); + __le32 *rxd = (__le32 *)data; + __le32 *end = (__le32 *)&rxd[len / 4]; + enum rx_pkt_type type; + + type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0])); + switch (type) { + case PKT_TYPE_TXRX_NOTIFY: + mt7915_mac_tx_free(dev, data, len); + return false; + case PKT_TYPE_TXS: + for (rxd += 2; rxd + 8 <= end; rxd += 8) + mt7915_mac_add_txs(dev, rxd); + return false; + default: + return true; + } +} + void mt7915_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, struct sk_buff *skb) { @@ -1629,7 +1652,8 @@ void mt7915_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, switch (type) { case PKT_TYPE_TXRX_NOTIFY: - mt7915_mac_tx_free(dev, skb); + mt7915_mac_tx_free(dev, skb->data, skb->len); + napi_consume_skb(skb, 1); break; case PKT_TYPE_RX_EVENT: mt7915_mcu_rx_event(dev, skb); diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h index c6c846d1900b..10e43307e486 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h @@ -519,6 +519,7 @@ void mt7915_tx_token_put(struct mt7915_dev *dev); int mt7915_init_tx_queues(struct mt7915_phy *phy, int idx, int n_desc); void mt7915_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, struct sk_buff *skb); +bool mt7915_rx_check(struct mt76_dev *mdev, void *data, int len); void mt7915_sta_ps(struct mt76_dev *mdev, struct ieee80211_sta *sta, bool ps); void mt7915_stats_work(struct work_struct *work); int mt76_dfs_start_rdd(struct mt7915_dev *dev, bool force); diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/pci.c b/drivers/net/wireless/mediatek/mt76/mt7915/pci.c index 0af4cdb897b7..8130ea43971f 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/pci.c @@ -230,6 +230,7 @@ static int mt7915_pci_probe(struct pci_dev *pdev, .tx_prepare_skb = mt7915_tx_prepare_skb, .tx_complete_skb = mt7915_tx_complete_skb, .rx_skb = mt7915_queue_rx_skb, + .rx_check = mt7915_rx_check, .rx_poll_complete = mt7915_rx_poll_complete, .sta_ps = mt7915_sta_ps, .sta_add = mt7915_mac_sta_add,