From patchwork Thu Aug 17 15:52:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 13356742 X-Patchwork-Delegate: nbd@nbd.name 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 E9986C3DA57 for ; Thu, 17 Aug 2023 15:53:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353372AbjHQPx1 (ORCPT ); Thu, 17 Aug 2023 11:53:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353354AbjHQPxI (ORCPT ); Thu, 17 Aug 2023 11:53:08 -0400 Received: from nbd.name (nbd.name [46.4.11.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DCC530C6 for ; Thu, 17 Aug 2023 08:53:06 -0700 (PDT) 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=VxuMiLESlxD/eircJaV3C6BGo2rJ4Tnp6brldfuFYQc=; b=QYEeGgwzrl/6pzn2Q99zO2w+jy PtmhD4N7MQYfG98PCrKZGK007mGbWechIv7TPNjcfDFQs5ouDOlC8xe9M1tIOANMJzKlGdrm/zxWJ SLmfZiykTVV15/pf5uSLBqdvSjfwec8uaxb1BpQCgxsESOQyrY4qsTvXkZ6xIsRKu3qk=; Received: from 134.101.185.184.dynamic-pppoe.dt.ipv4.wtnet.de ([134.101.185.184] helo=Maecks.fritz.box) by ds12 with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (Exim 4.94.2) (envelope-from ) id 1qWfJ2-00AmKH-6o for linux-wireless@vger.kernel.org; Thu, 17 Aug 2023 17:53:04 +0200 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 3/5] wifi: mt76: mt7603: improve stuck beacon handling Date: Thu, 17 Aug 2023 17:52:56 +0200 Message-ID: <20230817155258.62636-3-nbd@nbd.name> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230817155258.62636-1-nbd@nbd.name> References: <20230817155258.62636-1-nbd@nbd.name> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Before preparing the new beacon, check the queue status, flush out all previous beacons and buffered multicast packets, then (if necessary) try to recover more gracefully from a stuck beacon condition by making a less invasive attempt at getting the MAC un-stuck. Fixes: c8846e101502 ("mt76: add driver for MT7603E and MT7628/7688") Signed-off-by: Felix Fietkau --- .../wireless/mediatek/mt76/mt7603/beacon.c | 76 ++++++++++++++----- .../net/wireless/mediatek/mt76/mt7603/regs.h | 5 ++ 2 files changed, 60 insertions(+), 21 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/beacon.c b/drivers/net/wireless/mediatek/mt76/mt7603/beacon.c index 888678732f29..c223f7c19e6d 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7603/beacon.c +++ b/drivers/net/wireless/mediatek/mt76/mt7603/beacon.c @@ -9,6 +9,23 @@ struct beacon_bc_data { int count[MT7603_MAX_INTERFACES]; }; +static void +mt7603_mac_stuck_beacon_recovery(struct mt7603_dev *dev) +{ + if (dev->beacon_check % 5 != 4) + return; + + mt76_clear(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_EN); + mt76_set(dev, MT_SCH_4, MT_SCH_4_RESET); + mt76_clear(dev, MT_SCH_4, MT_SCH_4_RESET); + mt76_set(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_EN); + + mt76_set(dev, MT_WF_CFG_OFF_WOCCR, MT_WF_CFG_OFF_WOCCR_TMAC_GC_DIS); + mt76_set(dev, MT_ARB_SCR, MT_ARB_SCR_TX_DISABLE); + mt76_clear(dev, MT_ARB_SCR, MT_ARB_SCR_TX_DISABLE); + mt76_clear(dev, MT_WF_CFG_OFF_WOCCR, MT_WF_CFG_OFF_WOCCR_TMAC_GC_DIS); +} + static void mt7603_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif) { @@ -16,6 +33,8 @@ mt7603_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif) struct mt76_dev *mdev = &dev->mt76; struct mt7603_vif *mvif = (struct mt7603_vif *)vif->drv_priv; struct sk_buff *skb = NULL; + u32 om_idx = mvif->idx; + u32 val; if (!(mdev->beacon_mask & BIT(mvif->idx))) return; @@ -24,20 +43,33 @@ mt7603_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif) if (!skb) return; - mt76_tx_queue_skb(dev, dev->mphy.q_tx[MT_TXQ_BEACON], - MT_TXQ_BEACON, skb, &mvif->sta.wcid, NULL); + if (om_idx) + om_idx |= 0x10; + val = MT_DMA_FQCR0_BUSY | MT_DMA_FQCR0_MODE | + FIELD_PREP(MT_DMA_FQCR0_TARGET_BSS, om_idx) | + FIELD_PREP(MT_DMA_FQCR0_DEST_PORT_ID, 3) | + FIELD_PREP(MT_DMA_FQCR0_DEST_QUEUE_ID, 8); spin_lock_bh(&dev->ps_lock); - mt76_wr(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY | - FIELD_PREP(MT_DMA_FQCR0_TARGET_WCID, mvif->sta.wcid.idx) | - FIELD_PREP(MT_DMA_FQCR0_TARGET_QID, - dev->mphy.q_tx[MT_TXQ_CAB]->hw_idx) | - FIELD_PREP(MT_DMA_FQCR0_DEST_PORT_ID, 3) | - FIELD_PREP(MT_DMA_FQCR0_DEST_QUEUE_ID, 8)); - if (!mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY, 0, 5000)) + mt76_wr(dev, MT_DMA_FQCR0, val | + FIELD_PREP(MT_DMA_FQCR0_TARGET_QID, MT_TX_HW_QUEUE_BCN)); + if (!mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY, 0, 5000)) { dev->beacon_check = MT7603_WATCHDOG_TIMEOUT; + goto out; + } + + mt76_wr(dev, MT_DMA_FQCR0, val | + FIELD_PREP(MT_DMA_FQCR0_TARGET_QID, MT_TX_HW_QUEUE_BMC)); + if (!mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY, 0, 5000)) { + dev->beacon_check = MT7603_WATCHDOG_TIMEOUT; + goto out; + } + mt76_tx_queue_skb(dev, dev->mphy.q_tx[MT_TXQ_BEACON], + MT_TXQ_BEACON, skb, &mvif->sta.wcid, NULL); + +out: spin_unlock_bh(&dev->ps_lock); } @@ -81,6 +113,18 @@ void mt7603_pre_tbtt_tasklet(struct tasklet_struct *t) data.dev = dev; __skb_queue_head_init(&data.q); + /* Flush all previous CAB queue packets and beacons */ + mt76_wr(dev, MT_WF_ARB_CAB_FLUSH, GENMASK(30, 16) | BIT(0)); + + mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_CAB], false); + mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BEACON], false); + + if (dev->mphy.q_tx[MT_TXQ_BEACON]->queued > 0) + dev->beacon_check++; + else + dev->beacon_check = 0; + mt7603_mac_stuck_beacon_recovery(dev); + q = dev->mphy.q_tx[MT_TXQ_BEACON]; spin_lock(&q->lock); ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev), @@ -89,14 +133,9 @@ void mt7603_pre_tbtt_tasklet(struct tasklet_struct *t) mt76_queue_kick(dev, q); spin_unlock(&q->lock); - /* Flush all previous CAB queue packets */ - mt76_wr(dev, MT_WF_ARB_CAB_FLUSH, GENMASK(30, 16) | BIT(0)); - - mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_CAB], false); - mt76_csa_check(mdev); if (mdev->csa_complete) - goto out; + return; q = dev->mphy.q_tx[MT_TXQ_CAB]; do { @@ -108,7 +147,7 @@ void mt7603_pre_tbtt_tasklet(struct tasklet_struct *t) skb_queue_len(&data.q) < 8); if (skb_queue_empty(&data.q)) - goto out; + return; for (i = 0; i < ARRAY_SIZE(data.tail); i++) { if (!data.tail[i]) @@ -136,11 +175,6 @@ void mt7603_pre_tbtt_tasklet(struct tasklet_struct *t) MT_WF_ARB_CAB_START_BSSn(0) | (MT_WF_ARB_CAB_START_BSS0n(1) * ((1 << (MT7603_MAX_INTERFACES - 1)) - 1))); - -out: - mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BEACON], false); - if (dev->mphy.q_tx[MT_TXQ_BEACON]->queued > hweight8(mdev->beacon_mask)) - dev->beacon_check++; } void mt7603_beacon_set_timer(struct mt7603_dev *dev, int idx, int intval) diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/regs.h b/drivers/net/wireless/mediatek/mt76/mt7603/regs.h index a39c9a0fcb1c..524bceb8e958 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7603/regs.h +++ b/drivers/net/wireless/mediatek/mt76/mt7603/regs.h @@ -469,6 +469,11 @@ enum { #define MT_WF_SEC_BASE 0x21a00 #define MT_WF_SEC(ofs) (MT_WF_SEC_BASE + (ofs)) +#define MT_WF_CFG_OFF_BASE 0x21e00 +#define MT_WF_CFG_OFF(ofs) (MT_WF_CFG_OFF_BASE + (ofs)) +#define MT_WF_CFG_OFF_WOCCR MT_WF_CFG_OFF(0x004) +#define MT_WF_CFG_OFF_WOCCR_TMAC_GC_DIS BIT(4) + #define MT_SEC_SCR MT_WF_SEC(0x004) #define MT_SEC_SCR_MASK_ORDER GENMASK(1, 0)