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drm/i915: use new iterator in i915_gem_object_wait_reservation

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Simplifying the code a bit.

Signed-off-by: Christian König <christian.koenig@amd.com>
[mlankhorst: Handle timeout = 0 correctly, use new i915_request_wait_timeout.]
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20211116102431.198905-7-christian.koenig@amd.com
This commit is contained in:
Christian König 2021-10-21 12:35:39 +02:00
parent 7e2e69ed46
commit 2cbb8d4d67
1 changed files with 19 additions and 44 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

63
drivers/gpu/drm/i915/gem/i915_gem_wait.c
View file

@ -25,7 +25,7 @@ i915_gem_object_wait_fence(struct dma_fence *fence,
return timeout;
if (dma_fence_is_i915(fence))
return i915_request_wait(to_request(fence), flags, timeout);
return i915_request_wait_timeout(to_request(fence), flags, timeout);
return dma_fence_wait_timeout(fence,
flags & I915_WAIT_INTERRUPTIBLE,
@ -37,58 +37,29 @@ i915_gem_object_wait_reservation(struct dma_resv *resv,
unsigned int flags,
long timeout)
{
struct dma_fence *excl;
bool prune_fences = false;
struct dma_resv_iter cursor;
struct dma_fence *fence;
long ret = timeout ?: 1;
if (flags & I915_WAIT_ALL) {
struct dma_fence **shared;
unsigned int count, i;
int ret;
dma_resv_iter_begin(&cursor, resv, flags & I915_WAIT_ALL);
dma_resv_for_each_fence_unlocked(&cursor, fence) {
ret = i915_gem_object_wait_fence(fence, flags, timeout);
if (ret <= 0)
break;
ret = dma_resv_get_fences(resv, &excl, &count, &shared);
if (ret)
return ret;
for (i = 0; i < count; i++) {
timeout = i915_gem_object_wait_fence(shared[i],
flags, timeout);
if (timeout < 0)
break;
dma_fence_put(shared[i]);
}
for (; i < count; i++)
dma_fence_put(shared[i]);
kfree(shared);
/*
* If both shared fences and an exclusive fence exist,
* then by construction the shared fences must be later
* than the exclusive fence. If we successfully wait for
* all the shared fences, we know that the exclusive fence
* must all be signaled. If all the shared fences are
* signaled, we can prune the array and recover the
* floating references on the fences/requests.
*/
prune_fences = count && timeout >= 0;
} else {
excl = dma_resv_get_excl_unlocked(resv);
if (timeout)
timeout = ret;
}
if (excl && timeout >= 0)
timeout = i915_gem_object_wait_fence(excl, flags, timeout);
dma_fence_put(excl);
dma_resv_iter_end(&cursor);
/*
* Opportunistically prune the fences iff we know they have *all* been
* signaled.
*/
if (prune_fences)
if (timeout > 0)
dma_resv_prune(resv);
return timeout;
return ret;
}
static void fence_set_priority(struct dma_fence *fence,
@ -177,7 +148,11 @@ i915_gem_object_wait(struct drm_i915_gem_object *obj,
timeout = i915_gem_object_wait_reservation(obj->base.resv,
flags, timeout);
return timeout < 0 ? timeout : 0;
if (timeout < 0)
return timeout;
return !timeout ? -ETIME : 0;
}
static inline unsigned long nsecs_to_jiffies_timeout(const u64 n)