drm/i915: Mark shadow batch buffers as purgeable
By adding a new exec_entry flag, we cleanly mark the shadow objects
as purgeable after they are on the active list.
v2:
- Move 'shadow_batch_obj->madv = I915_MADV_WILLNEED' inside _get
fnc (danvet, from v4 6/7 feedback)
v3:
- Remove duplicate 'madv = I915_MADV_WILLNEED' (danvet, from v6 4/5)
Issue: VIZ-4719
Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-By: Jon Bloomfield <jon.bloomfield@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 5973e20..86de372 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -37,6 +37,7 @@
#define __EXEC_OBJECT_HAS_FENCE (1<<30)
#define __EXEC_OBJECT_NEEDS_MAP (1<<29)
#define __EXEC_OBJECT_NEEDS_BIAS (1<<28)
+#define __EXEC_OBJECT_PURGEABLE (1<<27)
#define BATCH_OFFSET_BIAS (256*1024)
@@ -226,7 +227,12 @@
if (entry->flags & __EXEC_OBJECT_HAS_PIN)
vma->pin_count--;
- entry->flags &= ~(__EXEC_OBJECT_HAS_FENCE | __EXEC_OBJECT_HAS_PIN);
+ if (entry->flags & __EXEC_OBJECT_PURGEABLE)
+ obj->madv = I915_MADV_DONTNEED;
+
+ entry->flags &= ~(__EXEC_OBJECT_HAS_FENCE |
+ __EXEC_OBJECT_HAS_PIN |
+ __EXEC_OBJECT_PURGEABLE);
}
static void eb_destroy(struct eb_vmas *eb)
@@ -1436,6 +1442,7 @@
vma = i915_gem_obj_to_ggtt(shadow_batch_obj);
vma->exec_entry = &shadow_exec_entry;
+ vma->exec_entry->flags = __EXEC_OBJECT_PURGEABLE;
drm_gem_object_reference(&shadow_batch_obj->base);
list_add_tail(&vma->exec_list, &eb->vmas);