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drm/i915: fix regression due to ba3d8d749b 

We don't track gpu flush request in any special way. So even with
obj->write_domain == 0, a gpu flush might be outstanding but no
yet executed. Even worse, the latest request might use the object
only for reading. So and unconditional call to object_wait_rendering
is needed for !pipelined.

Hence revert that patch fully and untangle the flushing from the
synchronization again.

Reported-by: Keith Packard <keithp@keithp.com>
Tested-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Daniel Vetter 2010-11-27 22:30:41 +01:00 коммит произвёл Chris Wilson
Родитель ba84cd1f2b
Коммит de18a29e0f
1 изменённых файлов: 18 добавлений и 25 удалений
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43
drivers/gpu/drm/i915/i915_gem.c
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@ -38,8 +38,7 @@
static uint32_t i915_gem_get_gtt_alignment(struct drm_gem_object *obj);
static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj,
bool pipelined);
static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj);
static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj);
static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj);
static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj,
@ -2594,7 +2593,7 @@ i915_gem_object_put_fence_reg(struct drm_gem_object *obj,
if (reg->gpu) {
int ret;
ret = i915_gem_object_flush_gpu_write_domain(obj, true);
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret)
return ret;
@ -2742,8 +2741,7 @@ i915_gem_clflush_object(struct drm_gem_object *obj)
/** Flushes any GPU write domain for the object if it's dirty. */
static int
i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj,
bool pipelined)
i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
uint32_t old_write_domain;
@ -2762,10 +2760,7 @@ i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj,
obj->read_domains,
old_write_domain);
if (pipelined)
return 0;
return i915_gem_object_wait_rendering(obj, true);
return 0;
}
/** Flushes the GTT write domain for the object if it's dirty. */
@ -2826,18 +2821,15 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write)
if (obj_priv->gtt_space == NULL)
return -EINVAL;
ret = i915_gem_object_flush_gpu_write_domain(obj, false);
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return ret;
ret = i915_gem_object_wait_rendering(obj, true);
if (ret)
return ret;
i915_gem_object_flush_cpu_write_domain(obj);
if (write) {
ret = i915_gem_object_wait_rendering(obj, true);
if (ret)
return ret;
}
old_write_domain = obj->write_domain;
old_read_domains = obj->read_domains;
@ -2875,7 +2867,7 @@ i915_gem_object_set_to_display_plane(struct drm_gem_object *obj,
if (obj_priv->gtt_space == NULL)
return -EINVAL;
ret = i915_gem_object_flush_gpu_write_domain(obj, true);
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret)
return ret;
@ -2924,9 +2916,12 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write)
uint32_t old_write_domain, old_read_domains;
int ret;
ret = i915_gem_object_flush_gpu_write_domain(obj, false);
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return ret;
ret = i915_gem_object_wait_rendering(obj, true);
if (ret)
return ret;
i915_gem_object_flush_gtt_write_domain(obj);
@ -2935,12 +2930,6 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write)
*/
i915_gem_object_set_to_full_cpu_read_domain(obj);
if (write) {
ret = i915_gem_object_wait_rendering(obj, true);
if (ret)
return ret;
}
old_write_domain = obj->write_domain;
old_read_domains = obj->read_domains;
@ -3205,9 +3194,13 @@ i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj,
if (offset == 0 && size == obj->size)
return i915_gem_object_set_to_cpu_domain(obj, 0);
ret = i915_gem_object_flush_gpu_write_domain(obj, false);
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return ret;
ret = i915_gem_object_wait_rendering(obj, true);
if (ret)
return ret;
i915_gem_object_flush_gtt_write_domain(obj);
/* If we're already fully in the CPU read domain, we're done. */