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drm/i915: release the GTT mmaps when going into D3

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So we'll get a fault when someone tries to access the mmap, then we'll
wake up from D3.

v2: - Rebase
v3: - Use gtt active/inactive

Testcase: igt/pm_pc8/gem-mmap-gtt
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
[danvet: Add comment + WARN as discussed with Paulo on irc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2013-12-13 15:22:31 -02:00 committed by Daniel Vetter
parent 16a3d6ef9f
commit 48018a57a8
3 changed files with 19 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_drv.c
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@ -917,6 +917,8 @@ static int i915_runtime_suspend(struct device *device)
DRM_DEBUG_KMS("Suspending device\n");
i915_gem_release_all_mmaps(dev_priv);
del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
dev_priv->pm.suspended = true;
intel_opregion_notify_adapter(dev, PCI_D3cold);

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -2015,6 +2015,7 @@ void i915_gem_object_unpin(struct drm_i915_gem_object *obj);
int __must_check i915_vma_unbind(struct i915_vma *vma);
int __must_check i915_gem_object_ggtt_unbind(struct drm_i915_gem_object *obj);
int i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
void i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
void i915_gem_lastclose(struct drm_device *dev);

16
drivers/gpu/drm/i915/i915_gem.c
View File

@ -1465,6 +1465,22 @@ out:
return ret;
}
void i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv)
{
struct i915_vma *vma;
/*
* Only the global gtt is relevant for gtt memory mappings, so restrict
* list traversal to objects bound into the global address space. Note
* that the active list should be empty, but better safe than sorry.
*/
WARN_ON(!list_empty(&dev_priv->gtt.base.active_list));
list_for_each_entry(vma, &dev_priv->gtt.base.active_list, mm_list)
i915_gem_release_mmap(vma->obj);
list_for_each_entry(vma, &dev_priv->gtt.base.inactive_list, mm_list)
i915_gem_release_mmap(vma->obj);
}
/**
* i915_gem_release_mmap - remove physical page mappings
* @obj: obj in question