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drm/i915: Avoid BUG_ONs on VT switch with a wedged chipset. 

Instead, just warn that bad things are happening and do our best to clean up
the mess without the GPU's help.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Eric Anholt 2008-11-13 15:00:55 -08:00 committed by Dave Airlie
parent cdfbc41f6d
commit 28dfe52a6e
1 changed files with 39 additions and 14 deletions
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53
drivers/gpu/drm/i915/i915_gem.c
View File

@ -31,6 +31,8 @@
#include "i915_drv.h"
#include <linux/swap.h>
#define I915_GEM_GPU_DOMAINS (~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT))
static int
i915_gem_object_set_domain(struct drm_gem_object *obj,
uint32_t read_domains,
@ -2299,29 +2301,52 @@ i915_gem_idle(struct drm_device *dev)
i915_gem_retire_requests(dev);
/* Active and flushing should now be empty as we've
* waited for a sequence higher than any pending execbuffer
*/
BUG_ON(!list_empty(&dev_priv->mm.active_list));
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
if (!dev_priv->mm.wedged) {
/* Active and flushing should now be empty as we've
* waited for a sequence higher than any pending execbuffer
*/
WARN_ON(!list_empty(&dev_priv->mm.active_list));
WARN_ON(!list_empty(&dev_priv->mm.flushing_list));
/* Request should now be empty as we've also waited
* for the last request in the list
*/
WARN_ON(!list_empty(&dev_priv->mm.request_list));
}
/* Request should now be empty as we've also waited
* for the last request in the list
/* Empty the active and flushing lists to inactive. If there's
* anything left at this point, it means that we're wedged and
* nothing good's going to happen by leaving them there. So strip
* the GPU domains and just stuff them onto inactive.
*/
BUG_ON(!list_empty(&dev_priv->mm.request_list));
while (!list_empty(&dev_priv->mm.active_list)) {
struct drm_i915_gem_object *obj_priv;
/* Move all buffers out of the GTT. */
obj_priv = list_first_entry(&dev_priv->mm.active_list,
struct drm_i915_gem_object,
list);
obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS;
i915_gem_object_move_to_inactive(obj_priv->obj);
}
while (!list_empty(&dev_priv->mm.flushing_list)) {
struct drm_i915_gem_object *obj_priv;
obj_priv = list_first_entry(&dev_priv->mm.active_list,
struct drm_i915_gem_object,
list);
obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS;
i915_gem_object_move_to_inactive(obj_priv->obj);
}
/* Move all inactive buffers out of the GTT. */
ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list);
WARN_ON(!list_empty(&dev_priv->mm.inactive_list));
if (ret) {
mutex_unlock(&dev->struct_mutex);
return ret;
}
BUG_ON(!list_empty(&dev_priv->mm.active_list));
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
BUG_ON(!list_empty(&dev_priv->mm.inactive_list));
BUG_ON(!list_empty(&dev_priv->mm.request_list));
i915_gem_cleanup_ringbuffer(dev);
mutex_unlock(&dev->struct_mutex);