/* Called on the last userspace/kernel unreference of the BO. Returns
* it to the BO cache if possible, otherwise frees it.
*/
void vc4_free_object(struct drm_gem_object *gem_bo)
{
struct drm_device *dev = gem_bo->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_bo *bo = to_vc4_bo(gem_bo);
struct list_head *cache_list;
mutex_lock(&vc4->bo_lock);
/* If the object references someone else's memory, we can't cache it.
*/
if (gem_bo->import_attach) {
vc4_bo_destroy(bo);
goto out;
}
/* Don't cache if it was publicly named. */
if (gem_bo->name) {
vc4_bo_destroy(bo);
goto out;
}
/* If this object was partially constructed but CMA allocation
* had failed, just free it.
*/
if (!bo->base.vaddr) {
vc4_bo_destroy(bo);
goto out;
}
cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
if (!cache_list) {
vc4_bo_destroy(bo);
goto out;
}
if (bo->validated_shader) {
kfree(bo->validated_shader->texture_samples);
kfree(bo->validated_shader);
bo->validated_shader = NULL;
}
bo->free_time = jiffies;
list_add(&bo->size_head, cache_list);
list_add(&bo->unref_head, &vc4->bo_cache.time_list);
vc4->bo_stats.num_cached++;
vc4->bo_stats.size_cached += gem_bo->size;
vc4_bo_cache_free_old(dev);
out:
mutex_unlock(&vc4->bo_lock);
}
void vc4_bo_cache_purge(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
mutex_lock(&vc4->bo_lock);
while (!list_empty(&vc4->bo_cache.time_list)) {
struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
struct vc4_bo, unref_head);
vc4_bo_remove_from_cache(bo);
vc4_bo_destroy(bo);
}
mutex_unlock(&vc4->bo_lock);
}
/* Must be called with bo_lock held. */
static void vc4_bo_cache_free_old(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
unsigned long expire_time = jiffies - msecs_to_jiffies(1000);
while (!list_empty(&vc4->bo_cache.time_list)) {
struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
struct vc4_bo, unref_head);
if (time_before(expire_time, bo->free_time)) {
mod_timer(&vc4->bo_cache.time_timer,
round_jiffies_up(jiffies +
msecs_to_jiffies(1000)));
return;
}
vc4_bo_remove_from_cache(bo);
vc4_bo_destroy(bo);
}
}
