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authormonk.liu <monk.liu@amd.com>2016-11-04 16:16:09 -0400
committerSumit Semwal <sumit.semwal@linaro.org>2016-11-09 00:12:00 +0530
commit7392b4bb702b05749539ff0936e94976248240c9 (patch)
tree7aa0026cdcaf873f24434f67167e9be18a607e0c /drivers/dma-buf/dma-fence.c
parentc5ec903d8e8e9a9684ebb5ceef87f6a890d712b1 (diff)
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
Diffstat (limited to 'drivers/dma-buf/dma-fence.c')
-rw-r--r--drivers/dma-buf/dma-fence.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 3a7bf009c21c..cda40cbd8c43 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -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);