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drm/ttm: Allow execbuf util reserves without ticket

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If no reservation ticket is given to the execbuf reservation utilities,
try reservation with non-blocking semantics.
This is intended for eviction paths that use the execbuf reservation
utilities for convenience rather than for deadlock avoidance.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
This commit is contained in:
Thomas Hellstrom
2013-11-15 00:02:54 -08:00
parent a3483353ca
commit 8d17fb4455
2 changed files with 21 additions and 14 deletions
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3
include/drm/ttm/ttm_execbuf_util.h
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@@ -70,7 +70,8 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
/**
* function ttm_eu_reserve_buffers
*
* @ticket: [out] ww_acquire_ctx returned by call.
* @ticket: [out] ww_acquire_ctx filled in by call, or NULL if only
* non-blocking reserves should be tried.
* @list: thread private list of ttm_validate_buffer structs.
*
* Tries to reserve bos pointed to by the list entries for validation.