From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0A89F189BBD; Thu, 1 Aug 2024 00:14:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471298; cv=none; b=bTpfMPmOhm2lea90DrIFpzi8Smlr09DlSssuJJ8ef8fwl7zh2+QFru2ecjtjpHzHTjv7IBWvb6XNuLTzQ7lgLZxkw7WvODGzaEaY8zB7v9NDC4w2VumMvNzLtFfy1udPJtwwDp2+fdD1/CjLms9NpinjJYz78LbcPNmZtJD9zA4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471298; c=relaxed/simple; bh=dam+d36SAZLr3CX830BlK3Vb4G+3I/Cxso1OcgrzSHk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=boV2zyAC8GoIBGcDkYOOF362H1pLuBk+xOabtZf3n4hBRpO5GMfvYVy+oDj467i+Vn5eJjVH1rB8IBqsg+TWX64Gb9q6XnbyakRwuq4gBkqUuuVWoMPuG3NHnvjLNR1Tz3b/uRI+edw4uK11R/mVhkEhXioIwEJlEAUfVZXaTwg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bnOsXhTN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bnOsXhTN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CDD72C116B1; Thu, 1 Aug 2024 00:14:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722471297; bh=dam+d36SAZLr3CX830BlK3Vb4G+3I/Cxso1OcgrzSHk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bnOsXhTN8W84DqjvDNcYP1Tk6FZcZeJKMtYFbeuF41rLNkOy1OtS9q+wQtfxm8iPv XJhWjCGdq3iPu2YX0nG6eFHr9ILxu4p96CWTz13o0OElyiDLaxKPoH+nT9YjasH+rK K2jDr65LdhnvqWldlRx7Mlxl075uUrsEpJlaTZMUOc9TStkoO1nZvun4pqEZ3na42s bC6z2zhCeK2ZZyYnafJzPrC/tTJF6P6Y8591Zj5Z7Vf31cp0UWS75jXWpfSVJe8K2+ 9Qys5U/on/L9B4D7tllkOnXcELvUbk4wi3islbt7HxiwmtyKX1DPizWkVgbap7k2RD d0lEtzGqxWgjQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Richard Maina , Bjorn Andersson , Chris Lew , Sasha Levin , mathieu.poirier@linaro.org, linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org Subject: [PATCH AUTOSEL 6.10 061/121] remoteproc: qcom_q6v5_pas: Add hwspinlock bust on stop Date: Wed, 31 Jul 2024 19:59:59 -0400 Message-ID: <20240801000834.3930818-61-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801000834.3930818-1-sashal@kernel.org> References: <20240801000834.3930818-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.10.2 Content-Transfer-Encoding: 8bit From: Richard Maina [ Upstream commit 568b13b65078e2b557ccf47674a354cecd1db641 ] When remoteproc goes down unexpectedly this results in a state where any acquired hwspinlocks will remain locked possibly resulting in deadlock. In order to ensure all locks are freed we include a call to qcom_smem_bust_hwspin_lock_by_host() during remoteproc shutdown. For qcom_q6v5_pas remoteprocs, each remoteproc has an assigned smem host_id. Remoteproc can pass this id to smem to try and bust the lock on remoteproc stop. This edge case only occurs with q6v5_pas watchdog crashes. The error fatal case has handling to clear the hwspinlock before the error fatal interrupt is triggered. Signed-off-by: Richard Maina Reviewed-by: Bjorn Andersson Signed-off-by: Chris Lew Link: https://lore.kernel.org/r/20240529-hwspinlock-bust-v3-4-c8b924ffa5a2@quicinc.com Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- drivers/remoteproc/qcom_q6v5_pas.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c index 54d8005d40a34..8458bcfe9e19e 100644 --- a/drivers/remoteproc/qcom_q6v5_pas.c +++ b/drivers/remoteproc/qcom_q6v5_pas.c @@ -52,6 +52,7 @@ struct adsp_data { const char *ssr_name; const char *sysmon_name; int ssctl_id; + unsigned int smem_host_id; int region_assign_idx; int region_assign_count; @@ -81,6 +82,7 @@ struct qcom_adsp { int lite_pas_id; unsigned int minidump_id; int crash_reason_smem; + unsigned int smem_host_id; bool decrypt_shutdown; const char *info_name; @@ -399,6 +401,9 @@ static int adsp_stop(struct rproc *rproc) if (handover) qcom_pas_handover(&adsp->q6v5); + if (adsp->smem_host_id) + ret = qcom_smem_bust_hwspin_lock_by_host(adsp->smem_host_id); + return ret; } @@ -727,6 +732,7 @@ static int adsp_probe(struct platform_device *pdev) adsp->pas_id = desc->pas_id; adsp->lite_pas_id = desc->lite_pas_id; adsp->info_name = desc->sysmon_name; + adsp->smem_host_id = desc->smem_host_id; adsp->decrypt_shutdown = desc->decrypt_shutdown; adsp->region_assign_idx = desc->region_assign_idx; adsp->region_assign_count = min_t(int, MAX_ASSIGN_COUNT, desc->region_assign_count); @@ -1196,6 +1202,7 @@ static const struct adsp_data sm8550_adsp_resource = { .ssr_name = "lpass", .sysmon_name = "adsp", .ssctl_id = 0x14, + .smem_host_id = 2, }; static const struct adsp_data sm8550_cdsp_resource = { @@ -1216,6 +1223,7 @@ static const struct adsp_data sm8550_cdsp_resource = { .ssr_name = "cdsp", .sysmon_name = "cdsp", .ssctl_id = 0x17, + .smem_host_id = 5, }; static const struct adsp_data sm8550_mpss_resource = { @@ -1236,6 +1244,7 @@ static const struct adsp_data sm8550_mpss_resource = { .ssr_name = "mpss", .sysmon_name = "modem", .ssctl_id = 0x12, + .smem_host_id = 1, .region_assign_idx = 2, .region_assign_count = 1, .region_assign_vmid = QCOM_SCM_VMID_MSS_MSA, @@ -1275,6 +1284,7 @@ static const struct adsp_data sm8650_cdsp_resource = { .ssr_name = "cdsp", .sysmon_name = "cdsp", .ssctl_id = 0x17, + .smem_host_id = 5, .region_assign_idx = 2, .region_assign_count = 1, .region_assign_shared = true, @@ -1299,6 +1309,7 @@ static const struct adsp_data sm8650_mpss_resource = { .ssr_name = "mpss", .sysmon_name = "modem", .ssctl_id = 0x12, + .smem_host_id = 1, .region_assign_idx = 2, .region_assign_count = 3, .region_assign_vmid = QCOM_SCM_VMID_MSS_MSA, -- 2.43.0