static struct vc4_bo *
vc4_bo_from_cache(struct vc4_screen *screen, uint32_t size, const char *name)
{
struct vc4_bo_cache *cache = &screen->bo_cache;
uint32_t page_index = size / 4096 - 1;
if (cache->size_list_size <= page_index)
return NULL;
struct vc4_bo *bo = NULL;
mtx_lock(&cache->lock);
if (!list_empty(&cache->size_list[page_index])) {
bo = LIST_ENTRY(struct vc4_bo, cache->size_list[page_index].next,
size_list);
/* Check that the BO has gone idle. If not, then we want to
* allocate something new instead, since we assume that the
* user will proceed to CPU map it and fill it with stuff.
*/
if (!vc4_bo_wait(bo, 0, NULL)) {
mtx_unlock(&cache->lock);
return NULL;
}
pipe_reference_init(&bo->reference, 1);
vc4_bo_remove_from_cache(cache, bo);
bo->name = name;
}
static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev,
uint32_t size)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
uint32_t page_index = bo_page_index(size);
struct vc4_bo *bo = NULL;
size = roundup(size, PAGE_SIZE);
mutex_lock(&vc4->bo_lock);
if (page_index >= vc4->bo_cache.size_list_size)
goto out;
if (list_empty(&vc4->bo_cache.size_list[page_index]))
goto out;
bo = list_first_entry(&vc4->bo_cache.size_list[page_index],
struct vc4_bo, size_head);
vc4_bo_remove_from_cache(bo);
kref_init(&bo->base.base.refcount);
out:
mutex_unlock(&vc4->bo_lock);
return bo;
}
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);
}
}
