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authorMaarten Lankhorst <maarten.lankhorst@canonical.com>2012-11-06 14:39:43 +0100
committerDave Airlie <airlied@redhat.com>2012-11-20 16:17:35 +1000
commit654aa79259a19f0d5e3cf9cb20aff56dc3b041b7 (patch)
tree406029f079300aac57d3463cf952b68d122619e9 /include/drm
parent6c1e963cc5771c93d4ed7aa8bdd4322a7c918e9b (diff)
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drm/ttm: alter cpu_writers to return -EBUSY in ttm_execbuf_util reservations
This is similar to other platforms that don't allow command submission to buffers locked on the cpu. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/ttm/ttm_bo_api.h5
-rw-r--r--include/drm/ttm/ttm_bo_driver.h14
2 files changed, 3 insertions, 16 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 5ff938df5fc..c6cae733dde 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -424,8 +424,9 @@ extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev,
* @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.
+ * command submission that affects the buffer will return -EBUSY
+ * until ttm_bo_synccpu_write_release is called.
+ *
* Returns
* -EBUSY if the buffer is busy and no_wait is true.
* -ERESTARTSYS if interrupted by a signal.
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 4789beee3b7..dd96442cdc2 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -726,20 +726,6 @@ 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);