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drm/i915: Lazily migrate the objects after hibernation

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Now that we mark the object domains for having been restored from the
hibernation image, we not need to flush everything during resume and
can instead rely on the normal domain tracking to flush only when
required. The only caveat here are objects that are pinned for use by
the hardware, whose contents must be coherent for when the device
resumes reading from then (shortly afterwards with the driver assuming
the objects are in the correct domain).

References: https://bugs.freedesktop.org/show_bug.cgi?id=94722
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Cc: David Weinehall <david.weinehall@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Tested-by: David Weinehall <david.weinehall@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463207195-22076-3-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-05-14 07:26:34 +01:00
parent 461fb99c15
commit 975f7ff42e
1 changed files with 2 additions and 6 deletions
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8
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -3245,7 +3245,6 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
struct i915_ggtt *ggtt = &dev_priv->ggtt;
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
bool flush;
i915_check_and_clear_faults(dev_priv);
@ -3255,19 +3254,16 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
/* Cache flush objects bound into GGTT and rebind them. */
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
flush = false;
list_for_each_entry(vma, &obj->vma_list, obj_link) {
if (vma->vm != &ggtt->base)
continue;
WARN_ON(i915_vma_bind(vma, obj->cache_level,
PIN_UPDATE));
flush = true;
}
if (flush)
i915_gem_clflush_object(obj, obj->pin_display);
if (obj->pin_display)
WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
}
if (INTEL_INFO(dev)->gen >= 8) {