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drm/i915: Reserve shadow batch VMA analogue to others

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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 =