From patchwork Thu Apr 25 09:03:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karthikeyan Periyasamy X-Patchwork-Id: 792657 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E13984D0E for ; Thu, 25 Apr 2024 09:03:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714035814; cv=none; b=fF0OqyckXs+AX88e2Z1+BockhXWOTcfuVCi4G7fEo+Gcuui2XNS6mRD6ePSoZViggey4qrCdgzDz1k67EoZrPEwUtkjpa59rMs1h1EdrI5MaPvKAlvV27yt/owZXgYwzpvdtjQF7XkDA7AEV6aVU696FG6xp6li9now9M8eCrlM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714035814; c=relaxed/simple; bh=wONvwaQHU0falPX8nmRhH52zgYkHClyqGeGPQe/j9+E=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NXAYq2fpJJlPVgwXqvIg2c5anbyhA3ieVIiqoVX4heVjswIg/TWx/xRPKAxXY5fTRnL7lpT9rpr44SSpyjibW53lN81RKzMzyZRncAZR5CBGkmkjWb8bTSUhiLZw9lIrYAyKFpDhUtmD3JcyLLhegh3dk/xj7ZPPicgg2Pqcl3w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=eOT8aeBk; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="eOT8aeBk" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43P84qnL024296; Thu, 25 Apr 2024 09:03:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= qcppdkim1; bh=zsHjv04qDE/+0VQVNuH2rrg4LLOp8V8XxZ5z/DGPlKc=; b=eO T8aeBk0voakr2Tp3+TA885CVpPibLhD1cGIKSmhgf2Qboln6snjDG1S/43Kj1w5g Oa+e4/SFgg4xalk1WwOLDiXTKYNXkiDinZPitJ846llysLLdFNfJUTsfI0auVoWZ A/KGLjCAf8+ieUaIQsDRROoU8N8ELVwib32aZXkKuUyeAwkzSeP8XBpfQ8FSpVLP CV/naYUoBoVLI/sNoCXGQJ4Sx95h2X1fP8YkPG04PYMc8/lpRIiMMkP7wYqhdBgl EFNNgA8O7Mhfd1fsnh6l6XbhGakyM/2aNBYIe/2FBLbEdas9NapoTJZhZ/7TwLav TgaEOhKJK/19oFu8dt/w== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xqenp9ft8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Apr 2024 09:03:27 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 43P93RYG012717 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Apr 2024 09:03:27 GMT Received: from hu-periyasa-blr.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 25 Apr 2024 02:03:25 -0700 From: Karthikeyan Periyasamy To: CC: , Karthikeyan Periyasamy Subject: [PATCH v3 3/3] wifi: ath12k: Add lock to protect the hardware state Date: Thu, 25 Apr 2024 14:33:07 +0530 Message-ID: <20240425090307.3233434-4-quic_periyasa@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240425090307.3233434-1-quic_periyasa@quicinc.com> References: <20240425090307.3233434-1-quic_periyasa@quicinc.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: rbCqvXsdgjj34qZUhFczliS8kaxLT7xM X-Proofpoint-ORIG-GUID: rbCqvXsdgjj34qZUhFczliS8kaxLT7xM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-25_09,2024-04-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 phishscore=0 clxscore=1015 bulkscore=0 lowpriorityscore=0 impostorscore=0 mlxscore=0 priorityscore=1501 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404250063 Currently, hardware state is not protected across the reconfigure operations. However, in single wiphy models, multiple radio/links is exposed as a MAC hardware (ieee80211_hw) through the driver hardware abstraction (ath12k_hw) layer. In such scenario, we need to protect hardware state across the multiple radio/link at the driver hardware abstraction (ath12k_hw) layer. Therefore, introduce a new mutex in the ath12k_hw layer. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Karthikeyan Periyasamy --- drivers/net/wireless/ath/ath12k/core.c | 4 ++++ drivers/net/wireless/ath/ath12k/core.h | 6 ++++++ drivers/net/wireless/ath/ath12k/mac.c | 16 ++++++++++++++++ 3 files changed, 26 insertions(+) diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c index a685cfd6fd92..e9aabdb9341c 100644 --- a/drivers/net/wireless/ath/ath12k/core.c +++ b/drivers/net/wireless/ath/ath12k/core.c @@ -1048,6 +1048,8 @@ static void ath12k_core_post_reconfigure_recovery(struct ath12k_base *ab) if (!ah || ah->state == ATH12K_HW_STATE_OFF) continue; + mutex_lock(&ah->hw_mutex); + switch (ah->state) { case ATH12K_HW_STATE_ON: ah->state = ATH12K_HW_STATE_RESTARTING; @@ -1078,6 +1080,8 @@ static void ath12k_core_post_reconfigure_recovery(struct ath12k_base *ab) "device is wedged, will not restart hw %d\n", i); break; } + + mutex_unlock(&ah->hw_mutex); } complete(&ab->driver_recovery); diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h index c4eb8b25398c..d833361948b7 100644 --- a/drivers/net/wireless/ath/ath12k/core.h +++ b/drivers/net/wireless/ath/ath12k/core.h @@ -636,11 +636,17 @@ struct ath12k { struct ath12k_hw { struct ieee80211_hw *hw; struct ath12k_base *ab; + + /* Protect the write operation of the hardware state ath12k_hw::state + * between hardware start<=>reconfigure<=>stop transitions. + */ + struct mutex hw_mutex; enum ath12k_hw_state state; bool regd_updated; bool use_6ghz_regd; u8 num_radio; + /* Keep last */ struct ath12k radio[] __aligned(sizeof(void *)); }; diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c index 710ed8fa79fd..2626328056dd 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -5615,10 +5615,13 @@ static void ath12k_mac_wait_reconfigure(struct ath12k_base *ab) static int ath12k_mac_start(struct ath12k *ar) { + struct ath12k_hw *ah = ar->ah; struct ath12k_base *ab = ar->ab; struct ath12k_pdev *pdev = ar->pdev; int ret; + lockdep_assert_held(&ah->hw_mutex); + mutex_lock(&ar->conf_mutex); ret = ath12k_wmi_pdev_set_param(ar, WMI_PDEV_PARAM_PMF_QOS, @@ -5733,6 +5736,8 @@ static int ath12k_mac_op_start(struct ieee80211_hw *hw) ath12k_drain_tx(ah); + guard(mutex)(&ah->hw_mutex); + switch (ah->state) { case ATH12K_HW_STATE_OFF: ah->state = ATH12K_HW_STATE_ON; @@ -5831,9 +5836,12 @@ int ath12k_mac_rfkill_enable_radio(struct ath12k *ar, bool enable) static void ath12k_mac_stop(struct ath12k *ar) { + struct ath12k_hw *ah = ar->ah; struct htt_ppdu_stats_info *ppdu_stats, *tmp; int ret; + lockdep_assert_held(&ah->hw_mutex); + mutex_lock(&ar->conf_mutex); ret = ath12k_mac_config_mon_status_default(ar, false); if (ret && (ret != -EOPNOTSUPP)) @@ -5869,10 +5877,14 @@ static void ath12k_mac_op_stop(struct ieee80211_hw *hw) ath12k_drain_tx(ah); + mutex_lock(&ah->hw_mutex); + ah->state = ATH12K_HW_STATE_OFF; for_each_ar(ah, ar, i) ath12k_mac_stop(ar); + + mutex_unlock(&ah->hw_mutex); } static u8 @@ -7921,6 +7933,8 @@ ath12k_mac_op_reconfig_complete(struct ieee80211_hw *hw, if (reconfig_type != IEEE80211_RECONFIG_TYPE_RESTART) return; + guard(mutex)(&ah->hw_mutex); + if (ah->state != ATH12K_HW_STATE_RESTARTED) return; @@ -8923,6 +8937,8 @@ static struct ath12k_hw *ath12k_mac_hw_allocate(struct ath12k_base *ab, ah->ab = ab; ah->num_radio = num_pdev_map; + mutex_init(&ah->hw_mutex); + for (i = 0; i < num_pdev_map; i++) { ab = pdev_map[i].ab; pdev_idx = pdev_map[i].pdev_idx;