From: Jordan Crouse Date: Mon, 28 Nov 2016 19:28:27 +0000 (-0700) Subject: drm/msm: gpu: Return error on hw_init failure X-Git-Tag: v4.10-rc1~154^2~19^2~7 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c4a8d4756061f72cba52af1e3035c07769cee679;p=karo-tx-linux.git drm/msm: gpu: Return error on hw_init failure When the GPU hardware init function fails (like say, ME_INIT timed out) return error instead of blindly continuing on. This gives us a small chance of saving the system before it goes boom. Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark --- diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c index a224fdbcb5f0..ff6489444423 100644 --- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c @@ -41,7 +41,7 @@ extern bool hang_debug; static void a3xx_dump(struct msm_gpu *gpu); -static void a3xx_me_init(struct msm_gpu *gpu) +static bool a3xx_me_init(struct msm_gpu *gpu) { struct msm_ringbuffer *ring = gpu->rb; @@ -65,7 +65,7 @@ static void a3xx_me_init(struct msm_gpu *gpu) OUT_RING(ring, 0x00000000); gpu->funcs->flush(gpu); - gpu->funcs->idle(gpu); + return gpu->funcs->idle(gpu); } static int a3xx_hw_init(struct msm_gpu *gpu) @@ -294,9 +294,7 @@ static int a3xx_hw_init(struct msm_gpu *gpu) /* clear ME_HALT to start micro engine */ gpu_write(gpu, REG_AXXX_CP_ME_CNTL, 0); - a3xx_me_init(gpu); - - return 0; + return a3xx_me_init(gpu) ? 0 : -EINVAL; } static void a3xx_recover(struct msm_gpu *gpu) @@ -337,17 +335,22 @@ static void a3xx_destroy(struct msm_gpu *gpu) kfree(a3xx_gpu); } -static void a3xx_idle(struct msm_gpu *gpu) +static bool a3xx_idle(struct msm_gpu *gpu) { /* wait for ringbuffer to drain: */ - adreno_idle(gpu); + if (!adreno_idle(gpu)) + return false; /* then wait for GPU to finish: */ if (spin_until(!(gpu_read(gpu, REG_A3XX_RBBM_STATUS) & - A3XX_RBBM_STATUS_GPU_BUSY))) + A3XX_RBBM_STATUS_GPU_BUSY))) { DRM_ERROR("%s: timeout waiting for GPU to idle!\n", gpu->name); - /* TODO maybe we need to reset GPU here to recover from hang? */ + /* TODO maybe we need to reset GPU here to recover from hang? */ + return false; + } + + return true; } static irqreturn_t a3xx_irq(struct msm_gpu *gpu) diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c index 5745cc81eeda..2abf2627f822 100644 --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c @@ -113,7 +113,7 @@ static void a4xx_enable_hwcg(struct msm_gpu *gpu) } -static void a4xx_me_init(struct msm_gpu *gpu) +static bool a4xx_me_init(struct msm_gpu *gpu) { struct msm_ringbuffer *ring = gpu->rb; @@ -137,7 +137,7 @@ static void a4xx_me_init(struct msm_gpu *gpu) OUT_RING(ring, 0x00000000); gpu->funcs->flush(gpu); - gpu->funcs->idle(gpu); + return gpu->funcs->idle(gpu); } static int a4xx_hw_init(struct msm_gpu *gpu) @@ -292,9 +292,7 @@ static int a4xx_hw_init(struct msm_gpu *gpu) /* clear ME_HALT to start micro engine */ gpu_write(gpu, REG_A4XX_CP_ME_CNTL, 0); - a4xx_me_init(gpu); - - return 0; + return a4xx_me_init(gpu) ? 0 : -EINVAL; } static void a4xx_recover(struct msm_gpu *gpu) @@ -335,17 +333,21 @@ static void a4xx_destroy(struct msm_gpu *gpu) kfree(a4xx_gpu); } -static void a4xx_idle(struct msm_gpu *gpu) +static bool a4xx_idle(struct msm_gpu *gpu) { /* wait for ringbuffer to drain: */ - adreno_idle(gpu); + if (!adreno_idle(gpu)) + return false; /* then wait for GPU to finish: */ if (spin_until(!(gpu_read(gpu, REG_A4XX_RBBM_STATUS) & - A4XX_RBBM_STATUS_GPU_BUSY))) + A4XX_RBBM_STATUS_GPU_BUSY))) { DRM_ERROR("%s: timeout waiting for GPU to idle!\n", gpu->name); + /* TODO maybe we need to reset GPU here to recover from hang? */ + return false; + } - /* TODO maybe we need to reset GPU here to recover from hang? */ + return true; } static irqreturn_t a4xx_irq(struct msm_gpu *gpu) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 3d4eb08d8c28..04080f9b7e09 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -218,19 +218,18 @@ void adreno_flush(struct msm_gpu *gpu) adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_WPTR, wptr); } -void adreno_idle(struct msm_gpu *gpu) +bool adreno_idle(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); uint32_t wptr = get_wptr(gpu->rb); - int ret; /* wait for CP to drain ringbuffer: */ - ret = spin_until(get_rptr(adreno_gpu) == wptr); - - if (ret) - DRM_ERROR("%s: timeout waiting to drain ringbuffer!\n", gpu->name); + if (!spin_until(get_rptr(adreno_gpu) == wptr)) + return true; /* TODO maybe we need to reset GPU here to recover from hang? */ + DRM_ERROR("%s: timeout waiting to drain ringbuffer!\n", gpu->name); + return false; } #ifdef CONFIG_DEBUG_FS diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h index cccc1a508295..d0f9e1e3acd6 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h @@ -182,7 +182,7 @@ void adreno_recover(struct msm_gpu *gpu); void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit, struct msm_file_private *ctx); void adreno_flush(struct msm_gpu *gpu); -void adreno_idle(struct msm_gpu *gpu); +bool adreno_idle(struct msm_gpu *gpu); #ifdef CONFIG_DEBUG_FS void adreno_show(struct msm_gpu *gpu, struct seq_file *m); #endif diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 6a7e78b317f2..10954135130d 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -50,7 +50,7 @@ struct msm_gpu_funcs { void (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit, struct msm_file_private *ctx); void (*flush)(struct msm_gpu *gpu); - void (*idle)(struct msm_gpu *gpu); + bool (*idle)(struct msm_gpu *gpu); irqreturn_t (*irq)(struct msm_gpu *irq); uint32_t (*last_fence)(struct msm_gpu *gpu); void (*recover)(struct msm_gpu *gpu);