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Commit a8198eea authored by Chris Wilson's avatar Chris Wilson Committed by Keith Packard
Browse files

drm/i915: Introduce i915_gem_object_finish_gpu() 



... reincarnated from i915_gem_object_flush_gpu(). The semantic
difference is that after calling finish_gpu() the object no longer
resides in any GPU domain, and so will cause the GPU caches to be
invalidated if it is ever used again.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 284d9529

drivers/gpu/drm/i915/i915_drv.h

+1 −1
Original line number Diff line number Diff line
@@ -1190,7 +1190,7 @@ void i915_gem_clflush_object(struct drm_i915_gem_object *obj); 
int __must_check i915_gem_object_set_domain(struct drm_i915_gem_object *obj,

					    uint32_t read_domains,

					    uint32_t write_domain);

int __must_check i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj);

int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj);

int __must_check i915_gem_init_ringbuffer(struct drm_device *dev);

void i915_gem_cleanup_ringbuffer(struct drm_device *dev);

void i915_gem_do_init(struct drm_device *dev,

drivers/gpu/drm/i915/i915_gem.c

+19 −10
Original line number Diff line number Diff line
@@ -2165,23 +2165,29 @@ i915_gem_object_unbind(struct drm_i915_gem_object *obj) 
		return -EINVAL;

	}



	ret = i915_gem_object_finish_gpu(obj);

	if (ret == -ERESTARTSYS)

		return ret;

	/* Continue on if we fail due to EIO, the GPU is hung so we

	 * should be safe and we need to cleanup or else we might

	 * cause memory corruption through use-after-free.

	 */



	/* blow away mappings if mapped through GTT */

	i915_gem_release_mmap(obj);



	/* Move the object to the CPU domain to ensure that

	 * any possible CPU writes while it's not in the GTT

	 * are flushed when we go to remap it. This will

	 * also ensure that all pending GPU writes are finished

	 * before we unbind.

	 * are flushed when we go to remap it.

	 */

	if (ret == 0)

		ret = i915_gem_object_set_to_cpu_domain(obj, 1);

	if (ret == -ERESTARTSYS)

		return ret;

	/* Continue on if we fail due to EIO, the GPU is hung so we

	 * should be safe and we need to cleanup or else we might

	 * cause memory corruption through use-after-free.

	 */

	if (ret) {

		/* In the event of a disaster, abandon all caches and

		 * hope for the best.

		 */

		i915_gem_clflush_object(obj);

		obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;

	}
@@ -3045,11 +3051,11 @@ i915_gem_object_set_to_display_plane(struct drm_i915_gem_object *obj, 
}



int

i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj)

i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj)

{

	int ret;



	if (!obj->active)

	if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0)

		return 0;



	if (obj->base.write_domain & I915_GEM_GPU_DOMAINS) {
@@ -3058,6 +3064,9 @@ i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj) 
			return ret;

	}



	/* Ensure that we invalidate the GPU's caches and TLBs. */

	obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;



	return i915_gem_object_wait_rendering(obj);

}

drivers/gpu/drm/i915/intel_display.c

+1 −1
Original line number Diff line number Diff line
@@ -1971,7 +1971,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, 
		 * This should only fail upon a hung GPU, in which case we

		 * can safely continue.

		 */

		ret = i915_gem_object_flush_gpu(obj);

		ret = i915_gem_object_finish_gpu(obj);

		(void) ret;

	}