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drm/msm: Support evicting GEM objects to swap

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Now that tracking is wired up for potentially evictable GEM objects,
wire up shrinker and the remaining GEM bits for unpinning backing pages
of inactive objects.

Disabled by default for now, with an 'enable_eviction' module param to
enable so that we can get some more testing on the range of generations
(and iommu pairings) supported.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20210405174532.1441497-9-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark
2021-04-05 10:45:31 -07:00
parent 81d4d597d4
commit 63f17ef834
3 changed files with 75 additions and 1 deletions
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23
drivers/gpu/drm/msm/msm_gem.c
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@ -759,6 +759,29 @@ void msm_gem_purge(struct drm_gem_object *obj)
0, (loff_t)-1);
}
/**
* Unpin the backing pages and make them available to be swapped out.
*/
void msm_gem_evict(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
struct msm_gem_object *msm_obj = to_msm_bo(obj);
GEM_WARN_ON(!msm_gem_is_locked(obj));
GEM_WARN_ON(is_unevictable(msm_obj));
GEM_WARN_ON(!msm_obj->evictable);
GEM_WARN_ON(msm_obj->active_count);
/* Get rid of any iommu mapping(s): */
put_iova_spaces(obj, false);
drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
put_pages(obj);
update_inactive(msm_obj);
}
void msm_gem_vunmap(struct drm_gem_object *obj)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);