From mboxrd@z Thu Jan 1 00:00:00 1970 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 89184C433F5 for ; Sun, 9 Oct 2022 22:28:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232149AbiJIW15 (ORCPT ); Sun, 9 Oct 2022 18:27:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231910AbiJIWZ4 (ORCPT ); Sun, 9 Oct 2022 18:25:56 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC8AC3DF18; Sun, 9 Oct 2022 15:18:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 1971EB80E00; Sun, 9 Oct 2022 22:16:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 835AFC43470; Sun, 9 Oct 2022 22:16:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665353786; bh=PytxVOSr5jFXPJQvawqoj1wVm66oLH6DZCYSKa7TKrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JniPNqtfYZGR1qnNFSob0OYI4+2u3uX5ZiMHBlZRZx5/FQSC1wBiqRUqsGSB6j874 vCrObr+u2Ml/kLy+7URc+XK8+p6NyvV9PipojCXH40TFq+yXohx6m/ySAQIeiXjGpH WGmPUL7Gbk6xNObM+uEYBdomXC8FPP5u9ae0sQnLjd/Toobk2gbFH1cC+e48ZJWrLb rSVPucs5jD4hldfvjUS0fj9NeV+drJxd/8JYCAP1AbPOBUvMNbosgwBMdDD9L8Wq/U BQVhpiWICkeoUJb4oMX6bmZ0Ieit1FyjkWc3J5aJlc/4awfF+On+CVP8VzdCiOhgwI z4y0ppsjVAAOA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Manikanta Pubbisetty , Kalle Valo , Sasha Levin , kvalo@kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.19 23/73] wifi: ath11k: Register shutdown handler for WCN6750 Date: Sun, 9 Oct 2022 18:14:01 -0400 Message-Id: <20221009221453.1216158-23-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221009221453.1216158-1-sashal@kernel.org> References: <20221009221453.1216158-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Manikanta Pubbisetty [ Upstream commit ac41c2b642b136a1e633379fcb87a9db0ee07f5b ] When the system shuts down, SMMU driver will be stopped and will not assist in IOVA translations. SMMU driver expects all of its consumers to shutdown before shutting down itself. WCN6750 being one of the consumer device should not perform any DMA operations after the SMMU has shutdown which will otherwise result in SMMU faults. SMMU driver will call the shutdown() callback of all its consumer devices and the consumers shall stop further DMA activity after the invocation of their respective shutdown() callbacks. Register the shutdown() callback to the platform core for WCN6750. Change will not impact other AHB ath11k devices. Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 Signed-off-by: Manikanta Pubbisetty Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220720134710.15523-1-quic_mpubbise@quicinc.com Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/ahb.c | 58 ++++++++++++++++++++------ drivers/net/wireless/ath/ath11k/core.c | 2 + 2 files changed, 47 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c index c47414710138..911eee9646a4 100644 --- a/drivers/net/wireless/ath/ath11k/ahb.c +++ b/drivers/net/wireless/ath/ath11k/ahb.c @@ -1088,20 +1088,10 @@ static int ath11k_ahb_probe(struct platform_device *pdev) return ret; } -static int ath11k_ahb_remove(struct platform_device *pdev) +static void ath11k_ahb_remove_prepare(struct ath11k_base *ab) { - struct ath11k_base *ab = platform_get_drvdata(pdev); unsigned long left; - if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) { - ath11k_ahb_power_down(ab); - ath11k_debugfs_soc_destroy(ab); - ath11k_qmi_deinit_service(ab); - goto qmi_fail; - } - - reinit_completion(&ab->driver_recovery); - if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) { left = wait_for_completion_timeout(&ab->driver_recovery, ATH11K_AHB_RECOVERY_TIMEOUT); @@ -1111,19 +1101,60 @@ static int ath11k_ahb_remove(struct platform_device *pdev) set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags); cancel_work_sync(&ab->restart_work); + cancel_work_sync(&ab->qmi.event_work); +} + +static void ath11k_ahb_free_resources(struct ath11k_base *ab) +{ + struct platform_device *pdev = ab->pdev; - ath11k_core_deinit(ab); -qmi_fail: ath11k_ahb_free_irq(ab); ath11k_hal_srng_deinit(ab); ath11k_ahb_fw_resource_deinit(ab); ath11k_ce_free_pipes(ab); ath11k_core_free(ab); platform_set_drvdata(pdev, NULL); +} + +static int ath11k_ahb_remove(struct platform_device *pdev) +{ + struct ath11k_base *ab = platform_get_drvdata(pdev); + + if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) { + ath11k_ahb_power_down(ab); + ath11k_debugfs_soc_destroy(ab); + ath11k_qmi_deinit_service(ab); + goto qmi_fail; + } + + ath11k_ahb_remove_prepare(ab); + ath11k_core_deinit(ab); + +qmi_fail: + ath11k_ahb_free_resources(ab); return 0; } +static void ath11k_ahb_shutdown(struct platform_device *pdev) +{ + struct ath11k_base *ab = platform_get_drvdata(pdev); + + /* platform shutdown() & remove() are mutually exclusive. + * remove() is invoked during rmmod & shutdown() during + * system reboot/shutdown. + */ + ath11k_ahb_remove_prepare(ab); + + if (!(test_bit(ATH11K_FLAG_REGISTERED, &ab->dev_flags))) + goto free_resources; + + ath11k_core_deinit(ab); + +free_resources: + ath11k_ahb_free_resources(ab); +} + static struct platform_driver ath11k_ahb_driver = { .driver = { .name = "ath11k", @@ -1131,6 +1162,7 @@ static struct platform_driver ath11k_ahb_driver = { }, .probe = ath11k_ahb_probe, .remove = ath11k_ahb_remove, + .shutdown = ath11k_ahb_shutdown, }; static int ath11k_ahb_init(void) diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index 6ddc698f4a2d..209345bedd09 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -1635,6 +1635,8 @@ static void ath11k_core_pre_reconfigure_recovery(struct ath11k_base *ab) wake_up(&ab->wmi_ab.tx_credits_wq); wake_up(&ab->peer_mapping_wq); + + reinit_completion(&ab->driver_recovery); } static void ath11k_core_post_reconfigure_recovery(struct ath11k_base *ab) -- 2.35.1