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[34.150.221.228]) by smtp.gmail.com with ESMTPSA id y11-20020a05620a25cb00b006ef1a8f1b81sm1985277qko.5.2022.11.11.11.50.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Nov 2022 11:50:13 -0800 (PST) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Subject: [PATCH 1/2] adreno: Shutdown the GPU properly Date: Fri, 11 Nov 2022 19:49:56 +0000 Message-Id: <20221111194957.4046771-1-joel@joelfernandes.org> X-Mailer: git-send-email 2.38.1.493.g58b659f92b-goog MIME-Version: 1.0 X-Mailman-Approved-At: Fri, 11 Nov 2022 20:58:22 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Clark , Emma Anholt , Akhil P Oommen , freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Ricardo Ribalda , Vladimir Lypak , Abhinav Kumar , Steven Rostedt , Dmitry Baryshkov , dri-devel@lists.freedesktop.org, Ross Zwisler , "Joel Fernandes \(Google\)" , Sean Paul Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" During kexec on ARM device, we notice that device_shutdown() only calls pm_runtime_force_suspend() while shutting down the GPU. This means the GPU kthread is still running and further, there maybe active submits. This causes all kinds of issues during a kexec reboot: Warning from shutdown path: [ 292.509662] WARNING: CPU: 0 PID: 6304 at [...] adreno_runtime_suspend+0x3c/0x44 [ 292.509863] Hardware name: Google Lazor (rev3 - 8) with LTE (DT) [ 292.509872] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 292.509881] pc : adreno_runtime_suspend+0x3c/0x44 [ 292.509891] lr : pm_generic_runtime_suspend+0x30/0x44 [ 292.509905] sp : ffffffc014473bf0 [...] [ 292.510043] Call trace: [ 292.510051] adreno_runtime_suspend+0x3c/0x44 [ 292.510061] pm_generic_runtime_suspend+0x30/0x44 [ 292.510071] pm_runtime_force_suspend+0x54/0xc8 [ 292.510081] adreno_shutdown+0x1c/0x28 [ 292.510090] platform_shutdown+0x2c/0x38 [ 292.510104] device_shutdown+0x158/0x210 [ 292.510119] kernel_restart_prepare+0x40/0x4c And here from GPU kthread, an SError OOPs: [ 192.648789] el1h_64_error+0x7c/0x80 [ 192.648812] el1_interrupt+0x20/0x58 [ 192.648833] el1h_64_irq_handler+0x18/0x24 [ 192.648854] el1h_64_irq+0x7c/0x80 [ 192.648873] local_daif_inherit+0x10/0x18 [ 192.648900] el1h_64_sync_handler+0x48/0xb4 [ 192.648921] el1h_64_sync+0x7c/0x80 [ 192.648941] a6xx_gmu_set_oob+0xbc/0x1fc [ 192.648968] a6xx_hw_init+0x44/0xe38 [ 192.648991] msm_gpu_hw_init+0x48/0x80 [ 192.649013] msm_gpu_submit+0x5c/0x1a8 [ 192.649034] msm_job_run+0xb0/0x11c [ 192.649058] drm_sched_main+0x170/0x434 [ 192.649086] kthread+0x134/0x300 [ 192.649114] ret_from_fork+0x10/0x20 Fix by calling adreno_system_suspend() in the device_shutdown() path. Cc: Rob Clark Cc: Steven Rostedt Cc: Ricardo Ribalda Cc: Ross Zwisler Signed-off-by: Joel Fernandes (Google) --- drivers/gpu/drm/msm/adreno/adreno_device.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 24b489b6129a..f0cff62812c3 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -607,9 +607,12 @@ static int adreno_remove(struct platform_device *pdev) return 0; } +static int adreno_system_suspend(struct device *dev); static void adreno_shutdown(struct platform_device *pdev) { - pm_runtime_force_suspend(&pdev->dev); + struct msm_gpu *gpu = dev_to_gpu(&pdev->dev); + + WARN_ON_ONCE(adreno_system_suspend(&pdev->dev)); } static const struct of_device_id dt_match[] = {