[PATCH 05/16] drm/msm/adreno: Coredump on GPU/GMU init failures

[Akhil P Oommen <akhilpo@oss.qualcomm.com>]

Capture coredump on GPU or GMU errors during initialization to help in
debugging the issues. To be consistent with the locks while calling
msm_gpu_crashstate_capture(), call pm_runtime_get(gpu) always with
msm_gpu->lock.

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c      | 1 +
 drivers/gpu/drm/msm/adreno/adreno_device.c | 7 +++++--
 drivers/gpu/drm/msm/adreno/adreno_gpu.c    | 2 ++
 drivers/gpu/drm/msm/msm_gpu.c              | 5 +++--
 drivers/gpu/drm/msm/msm_gpu.h              | 2 ++
 5 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 690d3e53e273..6d511dc54e43 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -1240,6 +1240,7 @@ int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
 	/* On failure, shut down the GMU to leave it in a good state */
 	if (ret) {
 		disable_irq(gmu->gmu_irq);
+		msm_gpu_crashstate_capture(gpu, NULL, NULL, NULL, NULL);
 		a6xx_rpmh_stop(gmu);
 		pm_runtime_put(gmu->gxpd);
 		pm_runtime_put(gmu->dev);
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 4edfe80c5be7..85b3e1f0e4fa 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -105,6 +105,7 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
 	 */
 	pm_runtime_enable(&pdev->dev);
 
+	mutex_lock(&gpu->lock);
 	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0) {
 		pm_runtime_put_noidle(&pdev->dev);
@@ -112,15 +113,15 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
 		goto err_disable_rpm;
 	}
 
-	mutex_lock(&gpu->lock);
 	ret = msm_gpu_hw_init(gpu);
-	mutex_unlock(&gpu->lock);
 	if (ret) {
+		msm_gpu_crashstate_capture(gpu, NULL, NULL, NULL, NULL);
 		DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret);
 		goto err_put_rpm;
 	}
 
 	pm_runtime_put_autosuspend(&pdev->dev);
+	mutex_unlock(&gpu->lock);
 
 #ifdef CONFIG_DEBUG_FS
 	if (gpu->funcs->debugfs_init) {
@@ -136,6 +137,8 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
 err_disable_rpm:
 	pm_runtime_disable(&pdev->dev);
 
+	mutex_unlock(&gpu->lock);
+
 	return NULL;
 }
 
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 1bc0e570bd12..10d9e5f40640 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -391,9 +391,11 @@ int adreno_get_param(struct msm_gpu *gpu, struct msm_context *ctx,
 		return 0;
 	case MSM_PARAM_TIMESTAMP:
 		if (adreno_gpu->funcs->get_timestamp) {
+			mutex_lock(&gpu->lock);
 			pm_runtime_get_sync(&gpu->pdev->dev);
 			*value = (uint64_t) adreno_gpu->funcs->get_timestamp(gpu);
 			pm_runtime_put_autosuspend(&gpu->pdev->dev);
+			mutex_unlock(&gpu->lock);
 
 			return 0;
 		}
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 995549d0bbbc..472db2c916f9 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -361,7 +361,7 @@ static void crashstate_get_vm_logs(struct msm_gpu_state *state, struct msm_gem_v
 	mutex_unlock(&vm->mmu_lock);
 }
 
-static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
+void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 		struct msm_gem_submit *submit, struct msm_gpu_fault_info *fault_info,
 		char *comm, char *cmd)
 {
@@ -886,7 +886,8 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
 
 	pm_runtime_get_sync(&gpu->pdev->dev);
 
-	msm_gpu_hw_init(gpu);
+	if (msm_gpu_hw_init(gpu))
+		msm_gpu_crashstate_capture(gpu, NULL, NULL, NULL, NULL);
 
 	submit->seqno = submit->hw_fence->seqno;
 
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 666cf499b7ec..eb5b3a7b81f9 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -747,6 +747,8 @@ static inline void msm_gpu_crashstate_put(struct msm_gpu *gpu)
 }
 
 void msm_gpu_fault_crashstate_capture(struct msm_gpu *gpu, struct msm_gpu_fault_info *fault_info);
+void msm_gpu_crashstate_capture(struct msm_gpu *gpu, struct msm_gem_submit *submit,
+		struct msm_gpu_fault_info *fault_info, char *comm, char *cmd);
 
 /*
  * Simple macro to semi-cleanly add the MAP_PRIV flag for targets that can

-- 
2.51.0