diff options
| -rw-r--r-- | drivers/gpu/drm/drm_gem.c | 18 | ||||
| -rw-r--r-- | include/drm/drm_gem.h | 12 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index aa15c52ae182..9b2e7864dbd0 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1459,3 +1459,21 @@ tail: return freed; } EXPORT_SYMBOL(drm_gem_lru_scan); + +/** + * drm_gem_evict - helper to evict backing pages for a GEM object + * @obj: obj in question + */ +int drm_gem_evict(struct drm_gem_object *obj) +{ + dma_resv_assert_held(obj->resv); + + if (!dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ)) + return -EBUSY; + + if (obj->funcs->evict) + return obj->funcs->evict(obj); + + return 0; +} +EXPORT_SYMBOL(drm_gem_evict); diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 772a4adf5287..c76e651f2d44 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -165,6 +165,16 @@ struct drm_gem_object_funcs { int (*mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma); /** + * @evict: + * + * Evicts gem object out from memory. Used by the drm_gem_object_evict() + * helper. Returns 0 on success, -errno otherwise. + * + * This callback is optional. + */ + int (*evict)(struct drm_gem_object *obj); + + /** * @vm_ops: * * Virtual memory operations used with mmap. @@ -479,4 +489,6 @@ void drm_gem_lru_move_tail(struct drm_gem_lru *lru, struct drm_gem_object *obj); unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned nr_to_scan, bool (*shrink)(struct drm_gem_object *obj)); +int drm_gem_evict(struct drm_gem_object *obj); + #endif /* __DRM_GEM_H__ */ |