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drm/i915: Remove inactive LRU tracking from set_domain_ioctl 

As the userspace mappings are torn down on every GPU write, we prefer to
track when the buffer is activated (via a fresh i915_gem_fault). This
makes the LRU conceptually simpler. With coherent mappings, the
remaining use-case for set_domain_ioctl is GPU synchronisation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-11-12 16:02:21 +00:00
parent d9e86c0ee6
commit c6748e09ee
1 changed files with 0 additions and 17 deletions
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17
drivers/gpu/drm/i915/i915_gem.c
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@ -1018,7 +1018,6 @@ int
i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_set_domain *args = data;
struct drm_i915_gem_object *obj;
uint32_t read_domains = args->read_domains;
@ -1051,21 +1050,9 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
goto unlock;
}
intel_mark_busy(dev, obj);
if (read_domains & I915_GEM_DOMAIN_GTT) {
ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
/* Update the LRU on the fence for the CPU access that's
* about to occur.
*/
if (obj->fence_reg != I915_FENCE_REG_NONE) {
struct drm_i915_fence_reg *reg =
&dev_priv->fence_regs[obj->fence_reg];
list_move_tail(&reg->lru_list,
&dev_priv->mm.fence_list);
}
/* Silently promote "you're not bound, there was nothing to do"
* to success, since the client was just asking us to
* make sure everything was done.
@ -1076,10 +1063,6 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
}
/* Maintain LRU order of "inactive" objects */
if (ret == 0 && i915_gem_object_is_inactive(obj))
list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
drm_gem_object_unreference(&obj->base);
unlock:
mutex_unlock(&dev->struct_mutex);