AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-06 05:36:39 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/i915: Remove completed fences after a wait

Browse Source 
If we wait upon the full (i.e. all shared fences, or upon an exclusive
fence) reservation object successfully, we know that all fences beneath
it have been signaled, so long as no new fences were added whilst we
slept. If the reservation_object remains the same, as detected by its
seqcount, we can then reap all the fences upon completion.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170217151304.16665-6-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-17 15:13:04 +00:00
parent 6ef98ea0da
commit e54ca97747
1 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/i915/i915_gem.c
View File

@ -427,7 +427,9 @@ i915_gem_object_wait_reservation(struct reservation_object *resv,
long timeout,
struct intel_rps_client *rps)
{
unsigned int seq = __read_seqcount_begin(&resv->seq);
struct dma_fence *excl;
bool prune_fences = false;
if (flags & I915_WAIT_ALL) {
struct dma_fence **shared;
@ -452,15 +454,26 @@ i915_gem_object_wait_reservation(struct reservation_object *resv,
for (; i < count; i++)
dma_fence_put(shared[i]);
kfree(shared);
prune_fences = count && timeout >= 0;
} else {
excl = reservation_object_get_excl_rcu(resv);
}
if (excl && timeout >= 0)
if (excl && timeout >= 0) {
timeout = i915_gem_object_wait_fence(excl, flags, timeout, rps);
prune_fences = timeout >= 0;
}
dma_fence_put(excl);
if (prune_fences && !__read_seqcount_retry(&resv->seq, seq)) {
reservation_object_lock(resv, NULL);
if (!__read_seqcount_retry(&resv->seq, seq))
reservation_object_add_excl_fence(resv, NULL);
reservation_object_unlock(resv);
}
return timeout;
}