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drm/i915: Apply big hammer to serialise buffer access between rings

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-11-01 12:22:48 +00:00
parent e5c6526036
commit 13b2928933
1 changed files with 52 additions and 23 deletions

75
drivers/gpu/drm/i915/i915_gem.c
View file

@ -3189,7 +3189,8 @@ i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj,
* write domain
*/
if (obj->write_domain &&
obj->write_domain != obj->pending_read_domains) {
(obj->write_domain != obj->pending_read_domains ||
obj_priv->ring != ring)) {
flush_domains |= obj->write_domain;
invalidate_domains |=
obj->pending_read_domains & ~obj->write_domain;
@ -3582,6 +3583,52 @@ i915_gem_execbuffer_pin(struct drm_device *dev,
} while (1);
}
static int
i915_gem_execbuffer_move_to_gpu(struct drm_device *dev,
struct drm_file *file,
struct intel_ring_buffer *ring,
struct drm_gem_object **objects,
int count)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int ret, i;
/* Zero the global flush/invalidate flags. These
* will be modified as new domains are computed
* for each object
*/
dev->invalidate_domains = 0;
dev->flush_domains = 0;
dev_priv->mm.flush_rings = 0;
for (i = 0; i < count; i++)
i915_gem_object_set_to_gpu_domain(objects[i], ring);
if (dev->invalidate_domains | dev->flush_domains) {
#if WATCH_EXEC
DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n",
__func__,
dev->invalidate_domains,
dev->flush_domains);
#endif
i915_gem_flush(dev, file,
dev->invalidate_domains,
dev->flush_domains,
dev_priv->mm.flush_rings);
}
for (i = 0; i < count; i++) {
struct drm_i915_gem_object *obj = to_intel_bo(objects[i]);
/* XXX replace with semaphores */
if (obj->ring && ring != obj->ring) {
ret = i915_gem_object_wait_rendering(&obj->base, true);
if (ret)
return ret;
}
}
return 0;
}
/* Throttle our rendering by waiting until the ring has completed our requests
* emitted over 20 msec ago.
*
@ -3843,28 +3890,10 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
goto err;
}
/* Zero the global flush/invalidate flags. These
* will be modified as new domains are computed
* for each object
*/
dev->invalidate_domains = 0;
dev->flush_domains = 0;
dev_priv->mm.flush_rings = 0;
for (i = 0; i < args->buffer_count; i++)
i915_gem_object_set_to_gpu_domain(object_list[i], ring);
if (dev->invalidate_domains | dev->flush_domains) {
#if WATCH_EXEC
DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n",
__func__,
dev->invalidate_domains,
dev->flush_domains);
#endif
i915_gem_flush(dev, file,
dev->invalidate_domains,
dev->flush_domains,
dev_priv->mm.flush_rings);
}
ret = i915_gem_execbuffer_move_to_gpu(dev, file, ring,
object_list, args->buffer_count);
if (ret)
goto err;
#if WATCH_COHERENCY
for (i = 0; i < args->buffer_count; i++) {