From patchwork Wed Apr 5 05:46:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramya Gnanasekar X-Patchwork-Id: 13201151 X-Patchwork-Delegate: kvalo@adurom.com 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 E3400C77B62 for ; Wed, 5 Apr 2023 05:47:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236827AbjDEFrE (ORCPT ); Wed, 5 Apr 2023 01:47:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229542AbjDEFrD (ORCPT ); Wed, 5 Apr 2023 01:47:03 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 695D9170C for ; Tue, 4 Apr 2023 22:47:02 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3353qbNx017884; Wed, 5 Apr 2023 05:46:59 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id; s=qcppdkim1; bh=zHqRbm1u6+B2/ZCZlA19hv32DhFUyke0y5ISbcE5RVE=; b=AZZHnyYZWkFZPV1Va/GJXgPHaVSshyKlFaXl5oBDI5C01Ji2pulS/QGE+n6h9gq7jsv/ 0ak8/FdUMpo1ULwc415Sj+7DBPOMXQcQYqHQTKKCjE9LlCrk81QPeLx+YD53sAPc7EWH 9co9p1U6YQB7BkvACEx/hfH0tZJlkh3qvHuKakWFo+ivMGqud6biecrmMBANhr53zHBs +zvkX8OVLTt9B1Km5QvaIWheUbIKPKZfOPwA9bI/oW5exRRBIA7iMA0GgSlvcR07A9M6 ZwJeZZiI1cmVsb+SCrAWHGWNK0u5CuNUMC6rLb4a89MQ8BsEDVW20xH7mKvU1VzwuuRQ fw== Received: from apblrppmta01.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3prpg21sex-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Apr 2023 05:46:59 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 3355k3Ur015810; Wed, 5 Apr 2023 05:46:55 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3ppdpkqtgx-1; Wed, 05 Apr 2023 05:46:55 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3355ksB9016446; Wed, 5 Apr 2023 05:46:54 GMT Received: from rgnanase-linux.qualcomm.com (rgnanase-linux.qualcomm.com [10.201.162.135]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3355ksdT016444; Wed, 05 Apr 2023 05:46:54 +0000 Received: by rgnanase-linux.qualcomm.com (Postfix, from userid 2378837) id 1C00E1103CFA; Wed, 5 Apr 2023 11:16:54 +0530 (IST) From: Ramya Gnanasekar To: ath12k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Karthik M , Ramya Gnanasekar Subject: [PATCH] wifi: ath12k: add wait operation for tx management packets for flush from mac80211 Date: Wed, 5 Apr 2023 11:16:46 +0530 Message-Id: <20230405054646.7300-1-quic_rgnanase@quicinc.com> X-Mailer: git-send-email 2.17.1 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: gK1kZe-qpfp11YWv4d0yOQy73ySNZud9 X-Proofpoint-ORIG-GUID: gK1kZe-qpfp11YWv4d0yOQy73ySNZud9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-05_02,2023-04-04_05,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 bulkscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 mlxscore=0 spamscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304050053 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Karthik M Transmission of management packets are done in a work queue. Sometimes the workqueue does not finish Tx immediately, then it lead after the next step of vdev delete finished, it start to send the management packet to firmware and lead firmware crash. ieee80211_set_disassoc() have logic of ieee80211_flush_queues() after it send_deauth_disassoc() to ath12k, its purpose is make sure the deauth was actually sent, so it need to change ath12k to match the purpose of mac80211. To address these issues wait for Tx management as well as Tx data packets. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Karthik M Signed-off-by: Ramya Gnanasekar diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c index a89e66653f04..499b81cd938e 100644 --- a/drivers/net/wireless/ath/ath12k/core.c +++ b/drivers/net/wireless/ath/ath12k/core.c @@ -706,6 +706,7 @@ static void ath12k_core_pre_reconfigure_recovery(struct ath12k_base *ab) idr_for_each(&ar->txmgmt_idr, ath12k_mac_tx_mgmt_pending_free, ar); idr_destroy(&ar->txmgmt_idr); + wake_up(&ar->txmgmt_empty_waitq); } wake_up(&ab->wmi_ab.tx_credits_wq); diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h index dffa687ee40e..509a9d4450b4 100644 --- a/drivers/net/wireless/ath/ath12k/core.h +++ b/drivers/net/wireless/ath/ath12k/core.h @@ -532,6 +532,7 @@ struct ath12k { /* protects txmgmt_idr data */ spinlock_t txmgmt_idr_lock; atomic_t num_pending_mgmt_tx; + wait_queue_head_t txmgmt_empty_waitq; /* cycle count is reported twice for each visited channel during scan. * access protected by data_lock diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c index bf7e5b6977b2..0e5cc477ba56 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -4316,6 +4316,21 @@ static int __ath12k_set_antenna(struct ath12k *ar, u32 tx_ant, u32 rx_ant) return 0; } +static void ath12k_mgmt_over_wmi_tx_drop(struct ath12k *ar, struct sk_buff *skb) +{ + int num_mgmt; + + ieee80211_free_txskb(ar->hw, skb); + + num_mgmt = atomic_dec_if_positive(&ar->num_pending_mgmt_tx); + + if (num_mgmt < 0) + WARN_ON_ONCE(1); + + if (!num_mgmt) + wake_up(&ar->txmgmt_empty_waitq); +} + int ath12k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx) { struct sk_buff *msdu = skb; @@ -4332,7 +4347,7 @@ int ath12k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx) info = IEEE80211_SKB_CB(msdu); memset(&info->status, 0, sizeof(info->status)); - ieee80211_free_txskb(ar->hw, msdu); + ath12k_mgmt_over_wmi_tx_drop(ar, skb); return 0; } @@ -4416,7 +4431,7 @@ static void ath12k_mgmt_over_wmi_tx_purge(struct ath12k *ar) struct sk_buff *skb; while ((skb = skb_dequeue(&ar->wmi_mgmt_tx_queue)) != NULL) - ieee80211_free_txskb(ar->hw, skb); + ath12k_mgmt_over_wmi_tx_drop(ar, skb); } static void ath12k_mgmt_over_wmi_tx_work(struct work_struct *work) @@ -4431,7 +4446,7 @@ static void ath12k_mgmt_over_wmi_tx_work(struct work_struct *work) skb_cb = ATH12K_SKB_CB(skb); if (!skb_cb->vif) { ath12k_warn(ar->ab, "no vif found for mgmt frame\n"); - ieee80211_free_txskb(ar->hw, skb); + ath12k_mgmt_over_wmi_tx_drop(ar, skb); continue; } @@ -4442,16 +4457,14 @@ static void ath12k_mgmt_over_wmi_tx_work(struct work_struct *work) if (ret) { ath12k_warn(ar->ab, "failed to tx mgmt frame, vdev_id %d :%d\n", arvif->vdev_id, ret); - ieee80211_free_txskb(ar->hw, skb); - } else { - atomic_inc(&ar->num_pending_mgmt_tx); + ath12k_mgmt_over_wmi_tx_drop(ar, skb); } } else { ath12k_warn(ar->ab, "dropping mgmt frame for vdev %d, is_started %d\n", arvif->vdev_id, arvif->is_started); - ieee80211_free_txskb(ar->hw, skb); + ath12k_mgmt_over_wmi_tx_drop(ar, skb); } } } @@ -4482,6 +4495,7 @@ static int ath12k_mac_mgmt_tx(struct ath12k *ar, struct sk_buff *skb, } skb_queue_tail(q, skb); + atomic_inc(&ar->num_pending_mgmt_tx); ieee80211_queue_work(ar->hw, &ar->wmi_mgmt_tx_work); return 0; @@ -5955,6 +5969,13 @@ static void ath12k_mac_op_flush(struct ieee80211_hw *hw, struct ieee80211_vif *v ATH12K_FLUSH_TIMEOUT); if (time_left == 0) ath12k_warn(ar->ab, "failed to flush transmit queue %ld\n", time_left); + + time_left = wait_event_timeout(ar->txmgmt_empty_waitq, + (atomic_read(&ar->num_pending_mgmt_tx) == 0), + ATH12K_FLUSH_TIMEOUT); + if (time_left == 0) + ath12k_warn(ar->ab, "failed to flush mgmt transmit queue %ld\n", + time_left); } static int @@ -6932,6 +6953,7 @@ int ath12k_mac_register(struct ath12k_base *ab) if (ret) goto err_cleanup; + init_waitqueue_head(&ar->txmgmt_empty_waitq); idr_init(&ar->txmgmt_idr); spin_lock_init(&ar->txmgmt_idr_lock); } diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c index 3e6991120e53..1d303b217758 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.c +++ b/drivers/net/wireless/ath/ath12k/wmi.c @@ -4637,6 +4637,7 @@ static int wmi_process_mgmt_tx_comp(struct ath12k *ar, u32 desc_id, struct sk_buff *msdu; struct ieee80211_tx_info *info; struct ath12k_skb_cb *skb_cb; + int num_mgmt; spin_lock_bh(&ar->txmgmt_idr_lock); msdu = idr_find(&ar->txmgmt_idr, desc_id); @@ -4660,10 +4661,15 @@ static int wmi_process_mgmt_tx_comp(struct ath12k *ar, u32 desc_id, ieee80211_tx_status_irqsafe(ar->hw, msdu); + num_mgmt = atomic_dec_if_positive(&ar->num_pending_mgmt_tx); + /* WARN when we received this event without doing any mgmt tx */ - if (atomic_dec_if_positive(&ar->num_pending_mgmt_tx) < 0) + if (num_mgmt < 0) WARN_ON_ONCE(1); + if (!num_mgmt) + wake_up(&ar->txmgmt_empty_waitq); + return 0; }