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| author | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2013-01-15 14:57:05 +0100 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2013-01-15 14:57:05 +0100 |
| commit | 5e45d7dfd74100d622f9cdc70bfd1f9fae1671de (patch) | |
| tree | b12de2542f55d332a73fcd7d863bd2e45fd7d4ef /include/drm | |
| parent | 7a1863084c9d90ce4b67d645bf9b0f1612e68f62 (diff) | |
| download | op-kernel-dev-5e45d7dfd74100d622f9cdc70bfd1f9fae1671de.zip op-kernel-dev-5e45d7dfd74100d622f9cdc70bfd1f9fae1671de.tar.gz | |
drm/ttm: add ttm_bo_reserve_slowpath
Instead of dropping everything, waiting for the bo to be unreserved
and trying over, a better strategy would be to do a blocking wait.
This can be mapped a lot better to a mutex_lock-like call.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/ttm/ttm_bo_driver.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index 6fff432..5af71af 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -821,6 +821,36 @@ extern int ttm_bo_reserve(struct ttm_buffer_object *bo, bool interruptible, bool no_wait, bool use_sequence, uint32_t sequence); +/** + * ttm_bo_reserve_slowpath_nolru: + * @bo: A pointer to a struct ttm_buffer_object. + * @interruptible: Sleep interruptible if waiting. + * @sequence: Set (@bo)->sequence to this value after lock + * + * This is called after ttm_bo_reserve returns -EAGAIN and we backed off + * from all our other reservations. Because there are no other reservations + * held by us, this function cannot deadlock any more. + * + * Will not remove reserved buffers from the lru lists. + * Otherwise identical to ttm_bo_reserve_slowpath. + */ +extern int ttm_bo_reserve_slowpath_nolru(struct ttm_buffer_object *bo, + bool interruptible, + uint32_t sequence); + + +/** + * ttm_bo_reserve_slowpath: + * @bo: A pointer to a struct ttm_buffer_object. + * @interruptible: Sleep interruptible if waiting. + * @sequence: Set (@bo)->sequence to this value after lock + * + * This is called after ttm_bo_reserve returns -EAGAIN and we backed off + * from all our other reservations. Because there are no other reservations + * held by us, this function cannot deadlock any more. + */ +extern int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo, + bool interruptible, uint32_t sequence); /** * ttm_bo_reserve_nolru: |
