Nobody uses it, so might as well simplify the code some.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@canonical.com --- diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 36f4b28..ddfe393 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -141,7 +141,6 @@ static void ttm_bo_release_list(struct kref *list_kref)
BUG_ON(atomic_read(&bo->list_kref.refcount)); BUG_ON(atomic_read(&bo->kref.refcount)); - BUG_ON(atomic_read(&bo->cpu_writers)); BUG_ON(bo->sync_obj != NULL); BUG_ON(bo->mem.mm_node != NULL); BUG_ON(!list_empty(&bo->lru)); @@ -1050,16 +1049,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo, } EXPORT_SYMBOL(ttm_bo_mem_space);
-int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) -{ - if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) - return -EBUSY; - - return wait_event_interruptible(bo->event_queue, - atomic_read(&bo->cpu_writers) == 0); -} -EXPORT_SYMBOL(ttm_bo_wait_cpu); - int ttm_bo_move_buffer(struct ttm_buffer_object *bo, struct ttm_placement *placement, bool interruptible, bool no_wait_reserve, @@ -1211,7 +1200,6 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
kref_init(&bo->kref); kref_init(&bo->list_kref); - atomic_set(&bo->cpu_writers, 0); atomic_set(&bo->reserved, 1); init_waitqueue_head(&bo->event_queue); INIT_LIST_HEAD(&bo->lru); @@ -1769,35 +1757,6 @@ int ttm_bo_wait(struct ttm_buffer_object *bo, } 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; - - /* - * Using ttm_bo_reserve makes sure the lru lists are updated. - */ - - ret = ttm_bo_reserve(bo, true, no_wait, false, 0); - 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); - return ret; -} -EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); - -void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) -{ - if (atomic_dec_and_test(&bo->cpu_writers)) - wake_up_all(&bo->event_queue); -} -EXPORT_SYMBOL(ttm_bo_synccpu_write_release); - /** * A buffer object shrink method that tries to swap out the first * buffer object on the bo_global::swap_lru list. diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index f8187ea..626a3f6 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -439,7 +439,6 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, INIT_LIST_HEAD(&fbo->swap); INIT_LIST_HEAD(&fbo->io_reserve_lru); fbo->vm_node = NULL; - atomic_set(&fbo->cpu_writers, 0);
fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); kref_init(&fbo->list_kref); diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/ttm/ttm_execbuf_util.c index 3832fe1..3f48a46 100644 --- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c +++ b/drivers/gpu/drm/ttm/ttm_execbuf_util.c @@ -181,15 +181,6 @@ retry_this_bo: }
entry->reserved = true; - if (unlikely(atomic_read(&bo->cpu_writers) > 0)) { - ttm_eu_backoff_reservation_locked(list); - spin_unlock(&glob->lru_lock); - ttm_eu_list_ref_sub(list); - ret = ttm_bo_wait_cpu(bo, false); - if (ret) - return ret; - goto retry; - } }
ttm_eu_del_from_lru_locked(list); diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index e15f2a8..0853162 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -225,12 +225,6 @@ struct ttm_buffer_object { bool evicted;
/** - * Members protected by the bo::reserved lock only when written to. - */ - - atomic_t cpu_writers; - - /** * Members protected by the bdev::lru_lock. */
@@ -423,31 +417,6 @@ extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched);
/** - * ttm_bo_synccpu_write_grab - * - * @bo: The buffer object: - * @no_wait: Return immediately if buffer is busy. - * - * Synchronizes a buffer object for CPU RW access. This means - * blocking command submission that affects the buffer and - * waiting for buffer idle. This lock is recursive. - * Returns - * -EBUSY if the buffer is busy and no_wait is true. - * -ERESTARTSYS if interrupted by a signal. - */ -extern int -ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait); - -/** - * ttm_bo_synccpu_write_release: - * - * @bo : The buffer object. - * - * Releases a synccpu lock. - */ -extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo); - -/** * ttm_bo_acc_size * * @bdev: Pointer to a ttm_bo_device struct. @@ -513,7 +482,7 @@ extern int ttm_bo_init(struct ttm_bo_device *bdev, void (*destroy) (struct ttm_buffer_object *));
/** - * ttm_bo_synccpu_object_init + * ttm_bo_create * * @bdev: Pointer to a ttm_bo_device struct. * @bo: Pointer to a ttm_buffer_object to be initialized. diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index a05f1b5..75d5da7 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -732,20 +732,6 @@ extern void ttm_bo_mem_put(struct ttm_buffer_object *bo, extern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem);
-/** - * ttm_bo_wait_for_cpu - * - * @bo: Pointer to a struct ttm_buffer_object. - * @no_wait: Don't sleep while waiting. - * - * Wait until a buffer object is no longer sync'ed for CPU access. - * Returns: - * -EBUSY: Buffer object was sync'ed for CPU access. (only if no_wait == 1). - * -ERESTARTSYS: An interruptible sleep was interrupted by a signal. - */ - -extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait); - extern void ttm_bo_global_release(struct drm_global_reference *ref); extern int ttm_bo_global_init(struct drm_global_reference *ref);