From patchwork Fri Feb 3 06:01:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Pubbisetty X-Patchwork-Id: 13127018 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 70385C636D7 for ; Fri, 3 Feb 2023 06:01:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230230AbjBCGB6 (ORCPT ); Fri, 3 Feb 2023 01:01:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230182AbjBCGB5 (ORCPT ); Fri, 3 Feb 2023 01:01:57 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 443776FD2B for ; Thu, 2 Feb 2023 22:01:56 -0800 (PST) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 313606Nb010422; Fri, 3 Feb 2023 06:01:54 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=YL4R8cevUVylwS/jEKSjw8UgDUD0vNtrwQhKqbiw4YI=; b=FYxkU2xEsR4giF9MprAHNUYcIMFviwYB010bqpFjkDSWRv/qlFKwnyrJ+roynkBakeo1 qKcjB2TK02dc6XhiPXrPyJplt1g6d6JGTLs7P18AhaAuUljho/LI7N2KM7DW64RcbCri NvFqWWqbu9wo3JSt7aVCdPZ7GBdZovs/KG1JFljCUYd+PzD2/1yye3plSJeESG+FA6Vb ZSh53NA7I4EjmIOzxV5OXlBd1KThA7Pq3BjeYmfHkOmxTF//HhusYbvIS99s7CgEYM6H g/XrTppbQmL8h1iBU0PXbNTMs6rPLO6yJSLEAQ1Og3XBqtrkC5ciO8EwGFEC4voDFNdd 9A== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ngns4gq4m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 03 Feb 2023 06:01:54 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 31361rtc004869 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 3 Feb 2023 06:01:53 GMT Received: from mpubbise-linux.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 15.2.986.36; Thu, 2 Feb 2023 22:01:51 -0800 From: Manikanta Pubbisetty To: CC: , Manikanta Pubbisetty Subject: [PATCH v4 1/3] ath11k: Fix double free issue during SRNG deinit Date: Fri, 3 Feb 2023 11:31:26 +0530 Message-ID: <20230203060128.19625-2-quic_mpubbise@quicinc.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20230203060128.19625-1-quic_mpubbise@quicinc.com> References: <20230203060128.19625-1-quic_mpubbise@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] 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: nmgUU8hdCxshkhShvFpKpzDgqSqGYWkR X-Proofpoint-ORIG-GUID: nmgUU8hdCxshkhShvFpKpzDgqSqGYWkR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-03_02,2023-02-02_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 mlxscore=0 mlxlogscore=731 impostorscore=0 malwarescore=0 adultscore=0 phishscore=0 clxscore=1015 spamscore=0 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302030055 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Currently struct ath11k_hal::srng_config pointer is not assigned to NULL after freeing the memory in ath11k_hal_srng_deinit(). This could lead to double free issue in a scenario where ath11k_hal_srng_deinit() is invoked back to back. In the current code, although the chances are very low, the above said scenario could happen when hardware recovery has failed and then there is another FW assert where ath11k_hal_srng_deinit() is invoked once again as part of recovery. Addressing this issue is important when low power mode support is enabled in the driver (will be added by a future patch) where this scenario is likely. Fix this by assigning the struct ath11k_hal::srng_config pointer to NULL after freeing the memory. Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16 Signed-off-by: Manikanta Pubbisetty --- drivers/net/wireless/ath/ath11k/hal.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c index 22422237500c..a20bf2792672 100644 --- a/drivers/net/wireless/ath/ath11k/hal.c +++ b/drivers/net/wireless/ath/ath11k/hal.c @@ -1324,6 +1324,7 @@ void ath11k_hal_srng_deinit(struct ath11k_base *ab) ath11k_hal_free_cont_rdp(ab); ath11k_hal_free_cont_wrp(ab); kfree(hal->srng_config); + hal->srng_config = NULL; } EXPORT_SYMBOL(ath11k_hal_srng_deinit); From patchwork Fri Feb 3 06:01:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Pubbisetty X-Patchwork-Id: 13127019 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 D3C86C61DA4 for ; Fri, 3 Feb 2023 06:02:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231160AbjBCGCA (ORCPT ); Fri, 3 Feb 2023 01:02:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230182AbjBCGB7 (ORCPT ); Fri, 3 Feb 2023 01:01:59 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27E9F6FD2B for ; Thu, 2 Feb 2023 22:01:58 -0800 (PST) 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 3135HAta025683; Fri, 3 Feb 2023 06:01:56 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=LYSQyu1j/QvH/H/UngGSw+5D4Cyb+dS8pRJY04xaRZ0=; b=TdQo7lwgtM8eNaG9pwUSC47jL/DhEjG4wZMnkGMd9XbEh2AHd1iJa+XTSXOhwu9VXT6I hc7JZ/pSvLm1UGmi7hodfDxC1Dwj9BYoWFHrsvOBlDaULbq4BrsJDeJmQaBuZSlcZMSc XFFKsMdJDkYk8grp5cx65aYMLj7T2hYOtppjpyG7Awp1mvMjtaANm9t/vq5xHK2FZeyq kx5gSJ4Cl80H4ZDYPKYo3rLUlB4+ZjmK3d8AhqbsR7FV7lXfDifUCVA8jT9RHuei+Zpz QNomBZaUtZvFI3TgJQkJ9A9FxuUXQs1uGsVXWzlYsCd0qJX/159g12qom38jqUtw7j0W Lw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ngns2gqna-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 03 Feb 2023 06:01:55 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 31361tr9004912 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 3 Feb 2023 06:01:55 GMT Received: from mpubbise-linux.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 15.2.986.36; Thu, 2 Feb 2023 22:01:53 -0800 From: Manikanta Pubbisetty To: CC: , Manikanta Pubbisetty Subject: [PATCH v4 2/3] ath11k: Move hardware initialization logic to start() Date: Fri, 3 Feb 2023 11:31:27 +0530 Message-ID: <20230203060128.19625-3-quic_mpubbise@quicinc.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20230203060128.19625-1-quic_mpubbise@quicinc.com> References: <20230203060128.19625-1-quic_mpubbise@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] 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: KlCdCfR1hmO4VTydww-R374orWQ2rrk4 X-Proofpoint-ORIG-GUID: KlCdCfR1hmO4VTydww-R374orWQ2rrk4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-03_02,2023-02-02_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 spamscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 mlxscore=0 adultscore=0 mlxlogscore=999 impostorscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302030055 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Currently during recovery, hardware is re-initialized as part of ath11k_core_reconfigure_on_crash(). In order to enable low power mode support in the driver, it is required to move the hardware re-initialization logic to ath11k_ops.start() hook. Since ath11k_ops.start() hook is called during WiFi ON/resume and also during hardware recovery, it is better to defer the hardware initialization to ath11k_ops.start() in the case of hardware recovery. This will help ensure that there is only path for the initialization of the hardware across different scenarios. A future patch will add the support of initializing the hardware from start() hook in WiFi ON/resume cases as well. Commit 38194f3a605e ("ath11k: add synchronization operation between reconfigure of mac80211 and ath11k_base") introduced a similar change that applies just to QCA6390/WCN6855 to defer the initialization of the hardware during recovery by using wait logic. This is no more needed and therefore remove it. Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16 Signed-off-by: Manikanta Pubbisetty --- drivers/net/wireless/ath/ath11k/core.c | 83 +++++++++++--------------- drivers/net/wireless/ath/ath11k/core.h | 6 +- drivers/net/wireless/ath/ath11k/mac.c | 29 +++------ drivers/net/wireless/ath/ath11k/qmi.c | 3 +- 4 files changed, 44 insertions(+), 77 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index 75fdbe4ef83a..5cdac963444e 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -1652,10 +1652,8 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) return ret; } -static int ath11k_core_reconfigure_on_crash(struct ath11k_base *ab) +static void ath11k_core_reconfigure_on_crash(struct ath11k_base *ab) { - int ret; - mutex_lock(&ab->core_lock); ath11k_thermal_unregister(ab); ath11k_hif_irq_disable(ab); @@ -1667,27 +1665,8 @@ static int ath11k_core_reconfigure_on_crash(struct ath11k_base *ab) mutex_unlock(&ab->core_lock); ath11k_dp_free(ab); - ath11k_hal_srng_deinit(ab); ab->free_vdev_map = (1LL << (ab->num_radios * TARGET_NUM_VDEVS(ab))) - 1; - - ret = ath11k_hal_srng_init(ab); - if (ret) - return ret; - - clear_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags); - - ret = ath11k_core_qmi_firmware_ready(ab); - if (ret) - goto err_hal_srng_deinit; - - clear_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags); - - return 0; - -err_hal_srng_deinit: - ath11k_hal_srng_deinit(ab); - return ret; } void ath11k_core_halt(struct ath11k *ar) @@ -1831,19 +1810,9 @@ static void ath11k_core_post_reconfigure_recovery(struct ath11k_base *ab) static void ath11k_core_restart(struct work_struct *work) { struct ath11k_base *ab = container_of(work, struct ath11k_base, restart_work); - int ret; - ret = ath11k_core_reconfigure_on_crash(ab); - if (ret) { - ath11k_err(ab, "failed to reconfigure driver on crash recovery\n"); - return; - } - - if (ab->is_reset) - complete_all(&ab->reconfigure_complete); - - if (!ab->is_reset) - ath11k_core_post_reconfigure_recovery(ab); + ath11k_core_reconfigure_on_crash(ab); + ath11k_core_post_reconfigure_recovery(ab); } static void ath11k_core_reset(struct work_struct *work) @@ -1897,18 +1866,6 @@ static void ath11k_core_reset(struct work_struct *work) ab->is_reset = true; atomic_set(&ab->recovery_count, 0); - reinit_completion(&ab->recovery_start); - atomic_set(&ab->recovery_start_count, 0); - - ath11k_core_pre_reconfigure_recovery(ab); - - reinit_completion(&ab->reconfigure_complete); - ath11k_core_post_reconfigure_recovery(ab); - - ath11k_dbg(ab, ATH11K_DBG_BOOT, "waiting recovery start...\n"); - - time_left = wait_for_completion_timeout(&ab->recovery_start, - ATH11K_RECOVER_START_TIMEOUT_HZ); ath11k_hif_power_down(ab); ath11k_hif_power_up(ab); @@ -2016,8 +1973,6 @@ struct ath11k_base *ath11k_core_alloc(struct device *dev, size_t priv_size, spin_lock_init(&ab->base_lock); mutex_init(&ab->vdev_id_11d_lock); init_completion(&ab->reset_complete); - init_completion(&ab->reconfigure_complete); - init_completion(&ab->recovery_start); INIT_LIST_HEAD(&ab->peers); init_waitqueue_head(&ab->peer_mapping_wq); @@ -2043,5 +1998,37 @@ struct ath11k_base *ath11k_core_alloc(struct device *dev, size_t priv_size, } EXPORT_SYMBOL(ath11k_core_alloc); +int ath11k_core_start_device(struct ath11k_base *ab) +{ + int ret; + + if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) + return 0; + + ath11k_hal_srng_deinit(ab); + + ret = ath11k_hal_srng_init(ab); + if (ret) { + ath11k_err(ab, "failed to init srng: %d\n", ret); + return ret; + } + + clear_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags); + + ret = ath11k_core_qmi_firmware_ready(ab); + if (ret) { + ath11k_err(ab, "failed to init core: %d\n", ret); + goto err_hal_srng_deinit; + } + + clear_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags); + + return 0; + +err_hal_srng_deinit: + ath11k_hal_srng_deinit(ab); + return ret; +} + MODULE_DESCRIPTION("Core module for Qualcomm Atheros 802.11ax wireless LAN cards."); MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index 0830276e5028..582960deb27b 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -60,8 +60,6 @@ extern unsigned int ath11k_frame_mode; #define ATH11K_RESET_MAX_FAIL_COUNT_FIRST 3 #define ATH11K_RESET_MAX_FAIL_COUNT_FINAL 5 #define ATH11K_RESET_FAIL_TIMEOUT_HZ (20 * HZ) -#define ATH11K_RECONFIGURE_TIMEOUT_HZ (10 * HZ) -#define ATH11K_RECOVER_START_TIMEOUT_HZ (20 * HZ) enum ath11k_supported_bw { ATH11K_BW_20 = 0, @@ -935,11 +933,8 @@ struct ath11k_base { struct work_struct reset_work; atomic_t reset_count; atomic_t recovery_count; - atomic_t recovery_start_count; bool is_reset; struct completion reset_complete; - struct completion reconfigure_complete; - struct completion recovery_start; /* continuous recovery fail count */ atomic_t fail_cont_count; unsigned long reset_fail_timeout; @@ -1172,6 +1167,7 @@ void ath11k_core_halt(struct ath11k *ar); int ath11k_core_resume(struct ath11k_base *ab); int ath11k_core_suspend(struct ath11k_base *ab); void ath11k_core_pre_reconfigure_recovery(struct ath11k_base *ab); +int ath11k_core_start_device(struct ath11k_base *ab); const struct firmware *ath11k_core_firmware_request(struct ath11k_base *ab, const char *filename); diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index 110a38cce0a7..742fbac3d54f 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -5810,27 +5810,6 @@ static int ath11k_mac_config_mon_status_default(struct ath11k *ar, bool enable) return ret; } -static void ath11k_mac_wait_reconfigure(struct ath11k_base *ab) -{ - int recovery_start_count; - - if (!ab->is_reset) - return; - - recovery_start_count = atomic_inc_return(&ab->recovery_start_count); - ath11k_dbg(ab, ATH11K_DBG_MAC, "recovery start count %d\n", recovery_start_count); - - if (recovery_start_count == ab->num_radios) { - complete(&ab->recovery_start); - ath11k_dbg(ab, ATH11K_DBG_MAC, "recovery started success\n"); - } - - ath11k_dbg(ab, ATH11K_DBG_MAC, "waiting reconfigure...\n"); - - wait_for_completion_timeout(&ab->reconfigure_complete, - ATH11K_RECONFIGURE_TIMEOUT_HZ); -} - static int ath11k_mac_op_start(struct ieee80211_hw *hw) { struct ath11k *ar = hw->priv; @@ -5839,6 +5818,13 @@ static int ath11k_mac_op_start(struct ieee80211_hw *hw) int ret; ath11k_mac_drain_tx(ar); + + ret = ath11k_core_start_device(ab); + if (ret) { + ath11k_err(ab, "failed to start device : %d\n", ret); + return ret; + } + mutex_lock(&ar->conf_mutex); switch (ar->state) { @@ -5847,7 +5833,6 @@ static int ath11k_mac_op_start(struct ieee80211_hw *hw) break; case ATH11K_STATE_RESTARTING: ar->state = ATH11K_STATE_RESTARTED; - ath11k_mac_wait_reconfigure(ab); break; case ATH11K_STATE_RESTARTED: case ATH11K_STATE_WEDGED: diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c index ab923e24b0a9..2e651b0fec8a 100644 --- a/drivers/net/wireless/ath/ath11k/qmi.c +++ b/drivers/net/wireless/ath/ath11k/qmi.c @@ -3165,8 +3165,7 @@ static void ath11k_qmi_driver_event_work(struct work_struct *work) set_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags); set_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags); - if (!ab->is_reset) - ath11k_core_pre_reconfigure_recovery(ab); + ath11k_core_pre_reconfigure_recovery(ab); break; case ATH11K_QMI_EVENT_REQUEST_MEM: ret = ath11k_qmi_event_mem_request(qmi); From patchwork Fri Feb 3 06:01:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Pubbisetty X-Patchwork-Id: 13127020 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 B82DEC61DA4 for ; Fri, 3 Feb 2023 06:02:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229698AbjBCGCD (ORCPT ); Fri, 3 Feb 2023 01:02:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229469AbjBCGCC (ORCPT ); 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Fri, 03 Feb 2023 06:01:57 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 31361vKV005062 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 3 Feb 2023 06:01:57 GMT Received: from mpubbise-linux.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 15.2.986.36; Thu, 2 Feb 2023 22:01:55 -0800 From: Manikanta Pubbisetty To: CC: , Manikanta Pubbisetty Subject: [PATCH v4 3/3] ath11k: Enable low power mode when WLAN is not active Date: Fri, 3 Feb 2023 11:31:28 +0530 Message-ID: <20230203060128.19625-4-quic_mpubbise@quicinc.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20230203060128.19625-1-quic_mpubbise@quicinc.com> References: <20230203060128.19625-1-quic_mpubbise@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] 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-ORIG-GUID: LCFs4Is4UdiweVCucEb8iMNuQZ1M3OLV X-Proofpoint-GUID: LCFs4Is4UdiweVCucEb8iMNuQZ1M3OLV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-03_02,2023-02-02_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 mlxlogscore=999 impostorscore=0 priorityscore=1501 mlxscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302030055 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Currently, WLAN chip is powered once during driver probe and is kept ON (powered) always even when WLAN is not active; keeping the chip powered ON all the time will consume extra power which is not desirable for a battery operated device. Same is the case with non-WoW suspend, chip will never be put into low power mode when the system is suspended resulting in higher battery drain. As per the recommendation, sending a PDEV suspend WMI command followed by a QMI MODE OFF command will cease all WLAN activity and put the device in low power mode. When WLAN interfaces are brought up, sending a QMI MISSION MODE command would be sufficient to bring the chip out of low power. This is a better approach than doing hif_power_down()/hif_power_up() for every WiFi ON/OFF sequence since the turnaround time for entry/exit of low power mode is much less. Overhead is just the time taken for sending QMI MODE OFF & QMI MISSION MODE commands instead of going through the entire chip boot & QMI init sequence. Currently the changes are applicable only for WCN6750. This can be extended to other targets with a future patch. Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16 Signed-off-by: Manikanta Pubbisetty --- drivers/net/wireless/ath/ath11k/ahb.c | 45 +++++ drivers/net/wireless/ath/ath11k/core.c | 225 ++++++++++++++++++++----- drivers/net/wireless/ath/ath11k/core.h | 4 + drivers/net/wireless/ath/ath11k/hif.h | 11 ++ drivers/net/wireless/ath/ath11k/mac.c | 8 +- drivers/net/wireless/ath/ath11k/pci.c | 26 +++ 6 files changed, 275 insertions(+), 44 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c index cd48eca494ed..708a49f82297 100644 --- a/drivers/net/wireless/ath/ath11k/ahb.c +++ b/drivers/net/wireless/ath/ath11k/ahb.c @@ -194,6 +194,47 @@ static const struct ath11k_pci_ops ath11k_ahb_pci_ops_wcn6750 = { .window_read32 = ath11k_ahb_window_read32_wcn6750, }; +static int ath11k_ahb_core_start_wcn6750(struct ath11k_base *ab) +{ + /* Initialize the hardware/firmware only for the first PDEV + * or during hardware recovery. + */ + if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) && + ath11k_core_any_pdevs_on(ab)) + return 0; + + return ath11k_core_start_device(ab); +} + +static void ath11k_ahb_core_stop_wcn6750(struct ath11k_base *ab) +{ + return ath11k_core_stop_device(ab); +} + +static int ath11k_ahb_core_start_ipq8074(struct ath11k_base *ab) +{ + /* TODO: Currently initializing the hardware/firmware only + * during hardware recovery. Support to shutdown/turn-on + * the hardware during Wi-Fi OFF/ON will be added later. + */ + if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) + return 0; + + return ath11k_core_start_device(ab); +} + +static void ath11k_ahb_core_stop_ipq8074(struct ath11k_base *ab) +{ + /* TODO: Currently stopping the hardware/firmware only + * during driver unload. Support to shutdown/turn-on + * the hardware during Wi-Fi OFF/ON will be added later. + */ + if (!test_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags)) + return; + + return ath11k_core_stop_device(ab); +} + static inline u32 ath11k_ahb_read32(struct ath11k_base *ab, u32 offset) { return ioread32(ab->mem + offset); @@ -793,6 +834,8 @@ static const struct ath11k_hif_ops ath11k_ahb_hif_ops_ipq8074 = { .map_service_to_pipe = ath11k_ahb_map_service_to_pipe, .power_down = ath11k_ahb_power_down, .power_up = ath11k_ahb_power_up, + .core_start = ath11k_ahb_core_start_ipq8074, + .core_stop = ath11k_ahb_core_stop_ipq8074, }; static const struct ath11k_hif_ops ath11k_ahb_hif_ops_wcn6750 = { @@ -812,6 +855,8 @@ static const struct ath11k_hif_ops ath11k_ahb_hif_ops_wcn6750 = { .resume = ath11k_ahb_hif_resume, .ce_irq_enable = ath11k_pci_enable_ce_irqs_except_wake_irq, .ce_irq_disable = ath11k_pci_disable_ce_irqs_except_wake_irq, + .core_start = ath11k_ahb_core_start_wcn6750, + .core_stop = ath11k_ahb_core_stop_wcn6750, }; static int ath11k_core_get_rproc(struct ath11k_base *ab) diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index 5cdac963444e..0e41a54c1bdb 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -1392,7 +1392,6 @@ static int ath11k_core_soc_create(struct ath11k_base *ab) static void ath11k_core_soc_destroy(struct ath11k_base *ab) { ath11k_debugfs_soc_destroy(ab); - ath11k_dp_free(ab); ath11k_reg_free(ab); ath11k_qmi_deinit_service(ab); } @@ -1413,31 +1412,14 @@ static int ath11k_core_pdev_create(struct ath11k_base *ab) goto err_pdev_debug; } - ret = ath11k_mac_register(ab); - if (ret) { - ath11k_err(ab, "failed register the radio with mac80211: %d\n", ret); - goto err_dp_pdev_free; - } - - ret = ath11k_thermal_register(ab); - if (ret) { - ath11k_err(ab, "could not register thermal device: %d\n", - ret); - goto err_mac_unregister; - } - ret = ath11k_spectral_init(ab); if (ret) { ath11k_err(ab, "failed to init spectral %d\n", ret); - goto err_thermal_unregister; + goto err_dp_pdev_free; } return 0; -err_thermal_unregister: - ath11k_thermal_unregister(ab); -err_mac_unregister: - ath11k_mac_unregister(ab); err_dp_pdev_free: ath11k_dp_pdev_free(ab); err_pdev_debug: @@ -1448,11 +1430,8 @@ static int ath11k_core_pdev_create(struct ath11k_base *ab) static void ath11k_core_pdev_destroy(struct ath11k_base *ab) { - ath11k_spectral_deinit(ab); ath11k_thermal_unregister(ab); ath11k_mac_unregister(ab); - ath11k_hif_irq_disable(ab); - ath11k_dp_pdev_free(ab); ath11k_debugfs_pdev_destroy(ab); } @@ -1584,26 +1563,20 @@ static int ath11k_core_start_firmware(struct ath11k_base *ab, return ret; } -int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) +static int ath11k_core_setup_resources(struct ath11k_base *ab) { int ret; - ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL); - if (ret) { - ath11k_err(ab, "failed to start firmware: %d\n", ret); - return ret; - } - ret = ath11k_ce_init_pipes(ab); if (ret) { ath11k_err(ab, "failed to initialize CE: %d\n", ret); - goto err_firmware_stop; + return ret; } ret = ath11k_dp_alloc(ab); if (ret) { ath11k_err(ab, "failed to init DP: %d\n", ret); - goto err_firmware_stop; + return ret; } switch (ath11k_crypto_mode) { @@ -1617,17 +1590,47 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) break; default: ath11k_info(ab, "invalid crypto_mode: %d\n", ath11k_crypto_mode); - return -EINVAL; + ret = -EINVAL; + goto err_dp_free; } if (ath11k_frame_mode == ATH11K_HW_TXRX_RAW) set_bit(ATH11K_FLAG_RAW_MODE, &ab->dev_flags); + return 0; + +err_dp_free: + ath11k_dp_free(ab); + + return ret; +} + +static void ath11k_core_free_resources(struct ath11k_base *ab) +{ + ath11k_dp_free(ab); +} + +static int ath11k_core_setup_device(struct ath11k_base *ab) +{ + int ret; + + ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL); + if (ret) { + ath11k_err(ab, "failed to start firmware: %d\n", ret); + return ret; + } + + ret = ath11k_core_setup_resources(ab); + if (ret) { + ath11k_err(ab, "failed to setup resources: %d\n", ret); + goto err_firmware_stop; + } + mutex_lock(&ab->core_lock); ret = ath11k_core_start(ab); if (ret) { ath11k_err(ab, "failed to start core: %d\n", ret); - goto err_dp_free; + goto err_free_resources; } ret = ath11k_core_pdev_create(ab); @@ -1635,7 +1638,10 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) ath11k_err(ab, "failed to create pdev core: %d\n", ret); goto err_core_stop; } + ath11k_hif_irq_enable(ab); + ath11k_hif_core_stop(ab); + mutex_unlock(&ab->core_lock); return 0; @@ -1643,8 +1649,8 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) err_core_stop: ath11k_core_stop(ab); ath11k_mac_destroy(ab); -err_dp_free: - ath11k_dp_free(ab); +err_free_resources: + ath11k_core_free_resources(ab); mutex_unlock(&ab->core_lock); err_firmware_stop: ath11k_qmi_firmware_stop(ab); @@ -1652,10 +1658,43 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) return ret; } +int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab) +{ + int ret; + + ret = ath11k_core_setup_device(ab); + if (ret) { + ath11k_err(ab, "failed to setup device: %d\n", ret); + return ret; + } + + ret = ath11k_mac_register(ab); + if (ret) { + ath11k_err(ab, "failed register the radio with mac80211: %d\n", ret); + goto err_free_device; + } + + ret = ath11k_thermal_register(ab); + if (ret) { + ath11k_err(ab, "could not register thermal device: %d\n", + ret); + goto err_mac_unregister; + } + + return 0; + +err_mac_unregister: + ath11k_mac_unregister(ab); +err_free_device: + ath11k_core_stop_device(ab); + ath11k_mac_destroy(ab); + + return ret; +} + static void ath11k_core_reconfigure_on_crash(struct ath11k_base *ab) { mutex_lock(&ab->core_lock); - ath11k_thermal_unregister(ab); ath11k_hif_irq_disable(ab); ath11k_dp_pdev_free(ab); ath11k_spectral_deinit(ab); @@ -1930,7 +1969,6 @@ void ath11k_core_deinit(struct ath11k_base *ab) mutex_lock(&ab->core_lock); ath11k_core_pdev_destroy(ab); - ath11k_core_stop(ab); mutex_unlock(&ab->core_lock); @@ -1998,37 +2036,140 @@ struct ath11k_base *ath11k_core_alloc(struct device *dev, size_t priv_size, } EXPORT_SYMBOL(ath11k_core_alloc); +static int ath11k_core_suspend_target(struct ath11k_base *ab, u32 suspend_opt) +{ + struct ath11k *ar; + struct ath11k_pdev *pdev; + unsigned long time_left; + int ret; + int i; + + for (i = 0; i < ab->num_radios; i++) { + pdev = &ab->pdevs[i]; + ar = pdev->ar; + + reinit_completion(&ab->htc_suspend); + + ret = ath11k_wmi_pdev_suspend(ar, suspend_opt, pdev->pdev_id); + if (ret) { + ath11k_warn(ab, "could not suspend target (%d)\n", ret); + return ret; + } + + time_left = wait_for_completion_timeout(&ab->htc_suspend, 3 * HZ); + + if (!time_left) { + ath11k_warn(ab, "suspend timed out - target pause event never came\n"); + return -ETIMEDOUT; + } + } + + return 0; +} + +void ath11k_core_stop_device(struct ath11k_base *ab) +{ + if (ab->core_stopped) + return; + + ath11k_spectral_deinit(ab); + ath11k_core_suspend_target(ab, WMI_PDEV_SUSPEND_AND_DISABLE_INTR); + ath11k_hif_irq_disable(ab); + ath11k_dp_pdev_free(ab); + ath11k_hif_stop(ab); + + if (!test_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags)) + ath11k_qmi_firmware_stop(ab); + + ath11k_wmi_detach(ab); + ath11k_dp_pdev_reo_cleanup(ab); + ath11k_dp_free(ab); + + ab->core_stopped = true; +} +EXPORT_SYMBOL(ath11k_core_stop_device); + +int ath11k_core_any_pdevs_on(struct ath11k_base *ab) +{ + struct ath11k_pdev *pdev; + struct ath11k *ar; + int i; + + for (i = 0; i < ab->num_radios; i++) { + pdev = &ab->pdevs[i]; + ar = pdev->ar; + if (!ar) + continue; + + if (ar->state == ATH11K_STATE_ON) + return true; + } + + return false; +} +EXPORT_SYMBOL(ath11k_core_any_pdevs_on); + int ath11k_core_start_device(struct ath11k_base *ab) { int ret; - if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) - return 0; + mutex_lock(&ab->core_lock); ath11k_hal_srng_deinit(ab); ret = ath11k_hal_srng_init(ab); if (ret) { ath11k_err(ab, "failed to init srng: %d\n", ret); - return ret; + goto err_unlock; } clear_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags); - ret = ath11k_core_qmi_firmware_ready(ab); + ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL); if (ret) { - ath11k_err(ab, "failed to init core: %d\n", ret); + ath11k_err(ab, "failed to start firmware: %d\n", ret); goto err_hal_srng_deinit; } + ret = ath11k_core_setup_resources(ab); + if (ret) { + ath11k_err(ab, "failed to setup resources: %d\n", ret); + goto err_firmware_stop; + } + + ret = ath11k_core_start(ab); + if (ret) { + ath11k_err(ab, "failed to start core: %d\n", ret); + goto err_free_resources; + } + + ret = ath11k_core_pdev_create(ab); + if (ret) { + ath11k_err(ab, "failed to create pdev core: %d\n", ret); + goto err_core_stop; + } + + ath11k_hif_irq_enable(ab); clear_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags); + mutex_unlock(&ab->core_lock); + + ab->core_stopped = false; return 0; +err_core_stop: + ath11k_core_stop(ab); +err_free_resources: + ath11k_core_free_resources(ab); +err_firmware_stop: + ath11k_qmi_firmware_stop(ab); err_hal_srng_deinit: ath11k_hal_srng_deinit(ab); +err_unlock: + mutex_unlock(&ab->core_lock); return ret; } +EXPORT_SYMBOL(ath11k_core_start_device); MODULE_DESCRIPTION("Core module for Qualcomm Atheros 802.11ax wireless LAN cards."); MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index 582960deb27b..ef4ab36f84e2 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -973,6 +973,8 @@ struct ath11k_base { const struct ath11k_pci_ops *ops; } pci; + bool core_stopped; + /* must be last */ u8 drv_priv[] __aligned(sizeof(void *)); }; @@ -1168,6 +1170,8 @@ int ath11k_core_resume(struct ath11k_base *ab); int ath11k_core_suspend(struct ath11k_base *ab); void ath11k_core_pre_reconfigure_recovery(struct ath11k_base *ab); int ath11k_core_start_device(struct ath11k_base *ab); +void ath11k_core_stop_device(struct ath11k_base *ab); +int ath11k_core_any_pdevs_on(struct ath11k_base *ab); const struct firmware *ath11k_core_firmware_request(struct ath11k_base *ab, const char *filename); diff --git a/drivers/net/wireless/ath/ath11k/hif.h b/drivers/net/wireless/ath/ath11k/hif.h index 659b80d2abd4..395b3dbf79b8 100644 --- a/drivers/net/wireless/ath/ath11k/hif.h +++ b/drivers/net/wireless/ath/ath11k/hif.h @@ -30,6 +30,8 @@ struct ath11k_hif_ops { void (*ce_irq_enable)(struct ath11k_base *ab); void (*ce_irq_disable)(struct ath11k_base *ab); void (*get_ce_msi_idx)(struct ath11k_base *ab, u32 ce_id, u32 *msi_idx); + int (*core_start)(struct ath11k_base *ab); + void (*core_stop)(struct ath11k_base *ab); }; static inline void ath11k_hif_ce_irq_enable(struct ath11k_base *ab) @@ -145,4 +147,13 @@ static inline void ath11k_get_ce_msi_idx(struct ath11k_base *ab, u32 ce_id, *msi_data_idx = ce_id; } +static inline int ath11k_hif_core_start(struct ath11k_base *ab) +{ + return ab->hif.ops->core_start(ab); +} + +static inline void ath11k_hif_core_stop(struct ath11k_base *ab) +{ + return ab->hif.ops->core_stop(ab); +} #endif /* _HIF_H_ */ diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index 742fbac3d54f..a3929ce6cd0f 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -5819,9 +5819,9 @@ static int ath11k_mac_op_start(struct ieee80211_hw *hw) ath11k_mac_drain_tx(ar); - ret = ath11k_core_start_device(ab); + ret = ath11k_hif_core_start(ab); if (ret) { - ath11k_err(ab, "failed to start device : %d\n", ret); + ath11k_err(ab, "failed to start core : %d\n", ret); return ret; } @@ -5982,6 +5982,10 @@ static void ath11k_mac_op_stop(struct ieee80211_hw *hw) synchronize_rcu(); atomic_set(&ar->num_pending_mgmt_tx, 0); + + /* If all PDEVs on the SoC are down, then power down the device */ + if (!ath11k_core_any_pdevs_on(ar->ab)) + ath11k_hif_core_stop(ar->ab); } static void diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 776362d151cb..c95e25cd4fa6 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -682,6 +682,30 @@ static int ath11k_pci_start(struct ath11k_base *ab) return 0; } +static int ath11k_pci_core_start(struct ath11k_base *ab) +{ + /* TODO: Currently initializing the hardware/firmware only + * during hardware recovery. Support to shutdown/turn-on + * the hardware during Wi-Fi OFF/ON will be added later. + */ + if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) + return 0; + + return ath11k_core_start_device(ab); +} + +static void ath11k_pci_core_stop(struct ath11k_base *ab) +{ + /* TODO: Currently stopping the hardware/firmware only + * during driver unload. Support to shutdown/turn-on + * the hardware during Wi-Fi OFF/ON will be added later. + */ + if (!test_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags)) + return; + + return ath11k_core_stop_device(ab); +} + static const struct ath11k_hif_ops ath11k_pci_hif_ops = { .start = ath11k_pci_start, .stop = ath11k_pcic_stop, @@ -700,6 +724,8 @@ static const struct ath11k_hif_ops ath11k_pci_hif_ops = { .ce_irq_enable = ath11k_pci_hif_ce_irq_enable, .ce_irq_disable = ath11k_pci_hif_ce_irq_disable, .get_ce_msi_idx = ath11k_pcic_get_ce_msi_idx, + .core_start = ath11k_pci_core_start, + .core_stop = ath11k_pci_core_stop, }; static void ath11k_pci_read_hw_version(struct ath11k_base *ab, u32 *major, u32 *minor)