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dma-buf: return index of the first signaled fence (v2) 

Return the index of the first signaled fence.  This information
is useful in some APIs like Vulkan.

v2: rebase on drm-next (fence -> dma_fence)

Signed-off-by: monk.liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
 [sumits: fix warnings]
Link: http://patchwork.freedesktop.org/patch/msgid/1478290570-30982-1-git-send-email-alexander.deucher@amd.com
hifive-unleashed-5.1
monk.liu 2016-11-04 16:16:09 -04:00 committed by Sumit Semwal
parent c5ec903d8e
commit 7392b4bb70
2 changed files with 18 additions and 6 deletions
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21
drivers/dma-buf/dma-fence.c
View File

@ -403,14 +403,18 @@ out:
EXPORT_SYMBOL(dma_fence_default_wait);
static bool
dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count)
dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count,
uint32_t *idx)
{
int i;
for (i = 0; i < count; ++i) {
struct dma_fence *fence = fences[i];
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) {
if (idx)
*idx = i;
return true;
}
}
return false;
}
@ -422,6 +426,8 @@ dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count)
* @count: [in] number of fences to wait on
* @intr: [in] if true, do an interruptible wait
* @timeout: [in] timeout value in jiffies, or MAX_SCHEDULE_TIMEOUT
* @idx: [out] the first signaled fence index, meaningful only on
* positive return
*
* Returns -EINVAL on custom fence wait implementation, -ERESTARTSYS if
* interrupted, 0 if the wait timed out, or the remaining timeout in jiffies
@ -433,7 +439,7 @@ dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count)
*/
signed long
dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
bool intr, signed long timeout)
bool intr, signed long timeout, uint32_t *idx)
{
struct default_wait_cb *cb;
signed long ret = timeout;
@ -444,8 +450,11 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
if (timeout == 0) {
for (i = 0; i < count; ++i)
if (dma_fence_is_signaled(fences[i]))
if (dma_fence_is_signaled(fences[i])) {
if (idx)
*idx = i;
return 1;
}
return 0;
}
@ -468,6 +477,8 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
if (dma_fence_add_callback(fence, &cb[i].base,
dma_fence_default_wait_cb)) {
/* This fence is already signaled */
if (idx)
*idx = i;
goto fence_rm_cb;
}
}
@ -478,7 +489,7 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
else
set_current_state(TASK_UNINTERRUPTIBLE);
if (dma_fence_test_signaled_any(fences, count))
if (dma_fence_test_signaled_any(fences, count, idx))
break;
ret = schedule_timeout(ret);

3
include/linux/dma-fence.h
View File

@ -382,7 +382,8 @@ signed long dma_fence_wait_timeout(struct dma_fence *,
bool intr, signed long timeout);
signed long dma_fence_wait_any_timeout(struct dma_fence **fences,
uint32_t count,
bool intr, signed long timeout);
bool intr, signed long timeout,
uint32_t *idx);
/**
* dma_fence_wait - sleep until the fence gets signaled