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drm/ttm: optionally move duplicates to a separate list

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This patch adds an optional list_head parameter to ttm_eu_reserve_buffers.
If specified duplicates in the execbuf list are no longer reported as errors,
but moved to this list instead.

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2014-12-03 15:46:48 +01:00
committed by Alex Deucher
parent 5e5c21cac1
commit aa35071c59
7 changed files with 26 additions and 8 deletions
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9
include/drm/ttm/ttm_execbuf_util.h
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@@ -68,6 +68,7 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
* non-blocking reserves should be tried.
* @list: thread private list of ttm_validate_buffer structs.
* @intr: should the wait be interruptible
* @dups: [out] optional list of duplicates.
*
* Tries to reserve bos pointed to by the list entries for validation.
* If the function returns 0, all buffers are marked as "unfenced",
@@ -83,6 +84,11 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
* calling process receives a signal while waiting. In that case, no
* buffers on the list will be reserved upon return.
*
* If dups is non NULL all buffers already reserved by the current thread
* (e.g. duplicates) are added to this list, otherwise -EALREADY is returned
* on the first already reserved buffer and all buffers from the list are
* unreserved again.
*
* Buffers reserved by this function should be unreserved by
* a call to either ttm_eu_backoff_reservation() or
* ttm_eu_fence_buffer_objects() when command submission is complete or
@@ -90,7 +96,8 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
*/
extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
struct list_head *list, bool intr);
struct list_head *list, bool intr,
struct list_head *dups);
/**
* function ttm_eu_fence_buffer_objects.