diff options
| author | monk.liu <monk.liu@amd.com> | 2016-11-04 23:16:09 +0300 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2016-11-08 21:42:00 +0300 |
| commit | 7392b4bb702b05749539ff0936e94976248240c9 (patch) | |
| tree | 7aa0026cdcaf873f24434f67167e9be18a607e0c /drivers/dma-buf/dma-fence.c | |
| parent | c5ec903d8e8e9a9684ebb5ceef87f6a890d712b1 (diff) | |
| download | linux-7392b4bb702b05749539ff0936e94976248240c9.tar.xz | |
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.c | 21 |
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); |