Hi Am 08.01.23 um 22:04 schrieb Dmitry Osipenko:
Add new common evict() callback to drm_gem_object_funcs and corresponding drm_gem_object_evict() helper. This is a first step on a way to providing common GEM-shrinker API for DRM drivers. Suggested-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx> with my comments below addressed.
--- drivers/gpu/drm/drm_gem.c | 16 ++++++++++++++++ include/drm/drm_gem.h | 12 ++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index c6bca5ac6e0f..dbb48fc9dff3 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1471,3 +1471,19 @@ drm_gem_lru_scan(struct drm_gem_lru *lru, return freed; } EXPORT_SYMBOL(drm_gem_lru_scan); + +/** + * drm_gem_object_evict - helper to evict backing pages for a GEM object + * @obj: obj in question + */ +bool
Please use int and return an errno code. No newline here, please.
+drm_gem_object_evict(struct drm_gem_object *obj)
+{
+ dma_resv_assert_held(obj->resv);
+
+ if (obj->funcs->evict)
+ return obj->funcs->evict(obj);
+
+ return false;
+}
+EXPORT_SYMBOL(drm_gem_object_evict);
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index f1f00fc2dba6..8e5c22f25691 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -172,6 +172,16 @@ struct drm_gem_object_funcs {
* This is optional but necessary for mmap support.
*/
const struct vm_operations_struct *vm_ops;
+
+ /**
+ * @evict:
+ *
+ * Evicts gem object out from memory. Used by the drm_gem_object_evict()
+ * helper. Returns true on success, false otherwise.
+ *
+ * This callback is optional.
+ */
+ bool (*evict)(struct drm_gem_object *obj);
This should be declared between mmap and evict. Again, please use int and return an errno code.
};/**@@ -481,4 +491,6 @@ unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned long *remaining, bool (*shrink)(struct drm_gem_object *obj));+bool drm_gem_object_evict(struct drm_gem_object *obj);
drm_gem_evict() should be the correct name; like drm_gem_vmap() and drm_gem_pin(), etc.
Best regards Thomas
+ #endif /* __DRM_GEM_H__ */
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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