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drm/i915: Reserve shadow batch VMA analogue to others 

If not pinned VMA can become an eviction target just before it needs to be
executed which breaks the internal object lifetime rules.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87399
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Tvrtko Ursulin 2015-01-07 17:32:39 +00:00 committed by Daniel Vetter
parent c9dc0f3598
commit 7226572d8e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -1084,6 +1084,7 @@ i915_gem_execbuffer_parse(struct intel_engine_cs *ring,
{
struct drm_i915_private *dev_priv = to_i915(batch_obj->base.dev);
struct drm_i915_gem_object *shadow_batch_obj;
bool need_reloc = false;
int ret;
shadow_batch_obj = i915_gem_batch_pool_get(&dev_priv->mm.batch_pool,
@ -1109,6 +1110,7 @@ i915_gem_execbuffer_parse(struct intel_engine_cs *ring,
vma->exec_entry = shadow_exec_entry;
vma->exec_entry->flags = __EXEC_OBJECT_PURGEABLE;
drm_gem_object_reference(&shadow_batch_obj->base);
i915_gem_execbuffer_reserve_vma(vma, ring, &need_reloc);
list_add_tail(&vma->exec_list, &eb->vmas);
shadow_batch_obj->base.pending_read_domains =