diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.c | 29 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 3 |
5 files changed, 40 insertions, 20 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 47a676d..ff4173e 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1729,6 +1729,8 @@ int i915_resume_switcheroo(struct drm_device *dev) * Reset the chip. Useful if a hang is detected. Returns zero on successful * reset or otherwise an error code. * + * Caller must hold the struct_mutex. + * * Procedure is fairly simple: * - reset the chip using the reset reg * - re-init context state @@ -1743,7 +1745,10 @@ int i915_reset(struct drm_i915_private *dev_priv) struct i915_gpu_error *error = &dev_priv->gpu_error; int ret; - mutex_lock(&dev->struct_mutex); + lockdep_assert_held(&dev->struct_mutex); + + if (!test_and_clear_bit(I915_RESET_IN_PROGRESS, &error->flags)) + return test_bit(I915_WEDGED, &error->flags) ? -EIO : 0; /* Clear any previous failed attempts at recovery. Time to try again. */ __clear_bit(I915_WEDGED, &error->flags); @@ -1784,9 +1789,6 @@ int i915_reset(struct drm_i915_private *dev_priv) goto error; } - clear_bit(I915_RESET_IN_PROGRESS, &error->flags); - mutex_unlock(&dev->struct_mutex); - /* * rps/rc6 re-init is necessary to restore state lost after the * reset and the re-install of gt irqs. Skip for ironlake per @@ -1800,7 +1802,6 @@ int i915_reset(struct drm_i915_private *dev_priv) error: set_bit(I915_WEDGED, &error->flags); - mutex_unlock(&dev->struct_mutex); return ret; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 20b7743..15f1977 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3863,7 +3863,9 @@ wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms) schedule_timeout_uninterruptible(remaining_jiffies); } } -static inline bool __i915_request_irq_complete(struct drm_i915_gem_request *req) + +static inline bool +__i915_request_irq_complete(struct drm_i915_gem_request *req) { struct intel_engine_cs *engine = req->engine; @@ -3925,17 +3927,6 @@ static inline bool __i915_request_irq_complete(struct drm_i915_gem_request *req) return true; } - /* We need to check whether any gpu reset happened in between - * the request being submitted and now. If a reset has occurred, - * the seqno will have been advance past ours and our request - * is complete. If we are in the process of handling a reset, - * the request is effectively complete as the rendering will - * be discarded, but we need to return in order to drop the - * struct_mutex. - */ - if (i915_reset_in_progress(&req->i915->gpu_error)) - return true; - return false; } diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 5f89801..64c3706 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -533,6 +533,16 @@ void __i915_add_request(struct drm_i915_gem_request *request, bool flush_caches) engine->submit_request(request); } +static void reset_wait_queue(wait_queue_head_t *q, wait_queue_t *wait) +{ + unsigned long flags; + + spin_lock_irqsave(&q->lock, flags); + if (list_empty(&wait->task_list)) + __add_wait_queue(q, wait); + spin_unlock_irqrestore(&q->lock, flags); +} + static unsigned long local_clock_us(unsigned int *cpu) { unsigned long t; @@ -710,6 +720,25 @@ wakeup: if (__i915_request_irq_complete(req)) break; + /* If the GPU is hung, and we hold the lock, reset the GPU + * and then check for completion. On a full reset, the engine's + * HW seqno will be advanced passed us and we are complete. + * If we do a partial reset, we have to wait for the GPU to + * resume and update the breadcrumb. + * + * If we don't hold the mutex, we can just wait for the worker + * to come along and update the breadcrumb (either directly + * itself, or indirectly by recovering the GPU). + */ + if (flags & I915_WAIT_LOCKED && + i915_reset_in_progress(&req->i915->gpu_error)) { + __set_current_state(TASK_RUNNING); + i915_reset(req->i915); + reset_wait_queue(&req->i915->gpu_error.wait_queue, + &reset); + continue; + } + /* Only spin if we know the GPU is processing this request */ if (i915_spin_request(req, state, 2)) break; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index ed172d7..2c7cb50 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -2521,7 +2521,9 @@ static void i915_reset_and_wakeup(struct drm_i915_private *dev_priv) * pending state and not properly drop locks, resulting in * deadlocks with the reset work. */ + mutex_lock(&dev_priv->drm.struct_mutex); ret = i915_reset(dev_priv); + mutex_unlock(&dev_priv->drm.struct_mutex); intel_finish_reset(dev_priv); diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 8687a84..d2d85fc 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -2229,9 +2229,6 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes) if (ret) return ret; - if (i915_reset_in_progress(&target->i915->gpu_error)) - return -EAGAIN; - i915_gem_request_retire_upto(target); intel_ring_update_space(ring); |
