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drm/ttm: kill fence_lock

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No users are left, kill it off! :D
Conversion to the reservation api is next on the list, after
that the functionality can be restored with rcu.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
This commit is contained in:
Maarten Lankhorst
2014-01-21 13:07:31 +01:00
parent 7040138ff8
commit dd7cfd6412
17 changed files with 41 additions and 146 deletions
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81
drivers/gpu/drm/ttm/ttm_bo.c
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@@ -415,24 +415,20 @@ static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
spin_lock(&glob->lru_lock);
ret = __ttm_bo_reserve(bo, false, true, false, NULL);
spin_lock(&bdev->fence_lock);
(void) ttm_bo_wait(bo, false, false, true);
if (!ret && !bo->sync_obj) {
spin_unlock(&bdev->fence_lock);
put_count = ttm_bo_del_from_lru(bo);
spin_unlock(&glob->lru_lock);
ttm_bo_cleanup_memtype_use(bo);
ttm_bo_list_ref_sub(bo, put_count, true);
return;
}
if (bo->sync_obj)
sync_obj = driver->sync_obj_ref(bo->sync_obj);
spin_unlock(&bdev->fence_lock);
if (!ret) {
(void) ttm_bo_wait(bo, false, false, true);
if (!bo->sync_obj) {
put_count = ttm_bo_del_from_lru(bo);
spin_unlock(&glob->lru_lock);
ttm_bo_cleanup_memtype_use(bo);
ttm_bo_list_ref_sub(bo, put_count, true);
return;
}
sync_obj = driver->sync_obj_ref(bo->sync_obj);
/*
* Make NO_EVICT bos immediately available to
@@ -481,7 +477,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
int put_count;
int ret;
spin_lock(&bdev->fence_lock);
ret = ttm_bo_wait(bo, false, false, true);
if (ret && !no_wait_gpu) {
@@ -493,7 +488,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
* no new sync objects can be attached.
*/
sync_obj = driver->sync_obj_ref(bo->sync_obj);
spin_unlock(&bdev->fence_lock);
__ttm_bo_unreserve(bo);
spin_unlock(&glob->lru_lock);
@@ -523,11 +517,9 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
* remove sync_obj with ttm_bo_wait, the wait should be
* finished, and no new wait object should have been added.
*/
spin_lock(&bdev->fence_lock);
ret = ttm_bo_wait(bo, false, false, true);
WARN_ON(ret);
}
spin_unlock(&bdev->fence_lock);
if (ret || unlikely(list_empty(&bo->ddestroy))) {
__ttm_bo_unreserve(bo);
@@ -665,9 +657,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
struct ttm_placement placement;
int ret = 0;
spin_lock(&bdev->fence_lock);
ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
spin_unlock(&bdev->fence_lock);
if (unlikely(ret != 0)) {
if (ret != -ERESTARTSYS) {
@@ -958,7 +948,6 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
{
int ret = 0;
struct ttm_mem_reg mem;
struct ttm_bo_device *bdev = bo->bdev;
lockdep_assert_held(&bo->resv->lock.base);
@@ -967,9 +956,7 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
* Have the driver move function wait for idle when necessary,
* instead of doing it here.
*/
spin_lock(&bdev->fence_lock);
ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
spin_unlock(&bdev->fence_lock);
if (ret)
return ret;
mem.num_pages = bo->num_pages;
@@ -1459,7 +1446,6 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
bdev->glob = glob;
bdev->need_dma32 = need_dma32;
bdev->val_seq = 0;
spin_lock_init(&bdev->fence_lock);
mutex_lock(&glob->device_list_mutex);
list_add_tail(&bdev->device_list, &glob->device_list);
mutex_unlock(&glob->device_list_mutex);
@@ -1517,7 +1503,6 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
bool lazy, bool interruptible, bool no_wait)
{
struct ttm_bo_driver *driver = bo->bdev->driver;
struct ttm_bo_device *bdev = bo->bdev;
void *sync_obj;
int ret = 0;
@@ -1526,53 +1511,33 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
if (likely(bo->sync_obj == NULL))
return 0;
while (bo->sync_obj) {
if (bo->sync_obj) {
if (driver->sync_obj_signaled(bo->sync_obj)) {
void *tmp_obj = bo->sync_obj;
bo->sync_obj = NULL;
driver->sync_obj_unref(&bo->sync_obj);
clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
spin_unlock(&bdev->fence_lock);
driver->sync_obj_unref(&tmp_obj);
spin_lock(&bdev->fence_lock);
continue;
return 0;
}
if (no_wait)
return -EBUSY;
sync_obj = driver->sync_obj_ref(bo->sync_obj);
spin_unlock(&bdev->fence_lock);
ret = driver->sync_obj_wait(sync_obj,
lazy, interruptible);
if (unlikely(ret != 0)) {
driver->sync_obj_unref(&sync_obj);
spin_lock(&bdev->fence_lock);
return ret;
}
spin_lock(&bdev->fence_lock);
if (likely(bo->sync_obj == sync_obj)) {
void *tmp_obj = bo->sync_obj;
bo->sync_obj = NULL;
if (likely(ret == 0)) {
clear_bit(TTM_BO_PRIV_FLAG_MOVING,
&bo->priv_flags);
spin_unlock(&bdev->fence_lock);
driver->sync_obj_unref(&sync_obj);
driver->sync_obj_unref(&tmp_obj);
spin_lock(&bdev->fence_lock);
} else {
spin_unlock(&bdev->fence_lock);
driver->sync_obj_unref(&sync_obj);
spin_lock(&bdev->fence_lock);
driver->sync_obj_unref(&bo->sync_obj);
}
driver->sync_obj_unref(&sync_obj);
}
return 0;
return ret;
}
EXPORT_SYMBOL(ttm_bo_wait);
int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
{
struct ttm_bo_device *bdev = bo->bdev;
int ret = 0;
/*
@@ -1582,9 +1547,7 @@ int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
ret = ttm_bo_reserve(bo, true, no_wait, false, NULL);
if (unlikely(ret != 0))
return ret;
spin_lock(&bdev->fence_lock);
ret = ttm_bo_wait(bo, false, true, no_wait);
spin_unlock(&bdev->fence_lock);
if (likely(ret == 0))
atomic_inc(&bo->cpu_writers);
ttm_bo_unreserve(bo);
@@ -1641,9 +1604,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
* Wait for GPU, then move to system cached.
*/
spin_lock(&bo->bdev->fence_lock);
ret = ttm_bo_wait(bo, false, false, false);
spin_unlock(&bo->bdev->fence_lock);
if (unlikely(ret != 0))
goto out;