diff options
| author | Philipp Zabel <p.zabel@pengutronix.de> | 2017-03-17 17:34:49 +0100 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2017-03-17 23:51:36 +0530 |
| commit | d5b72a2123dfaf9416b1a1177b4be041f8a8b6d4 (patch) | |
| tree | 13688abc1a544a75f611e0e8256c528762ddc518 | |
| parent | bb7d78568814a31a11fa14f1479a9fe51f1582ad (diff) | |
dma-fence: add dma_fence_match_context helper
Add a helper to check if all fences in a fence array are from a given
context. For convenience, the function can also handle being given a
non-array fence.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1489768492-25190-1-git-send-email-p.zabel@pengutronix.de
| -rw-r--r-- | drivers/dma-buf/dma-fence-array.c | 26 | ||||
| -rw-r--r-- | include/linux/dma-fence-array.h | 2 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-fence-array.c b/drivers/dma-buf/dma-fence-array.c index 67eb7c8fb88c..0350829ba62e 100644 --- a/drivers/dma-buf/dma-fence-array.c +++ b/drivers/dma-buf/dma-fence-array.c @@ -144,3 +144,29 @@ struct dma_fence_array *dma_fence_array_create(int num_fences, return array; } EXPORT_SYMBOL(dma_fence_array_create); + +/** + * dma_fence_match_context - Check if all fences are from the given context + * @fence: [in] fence or fence array + * @context: [in] fence context to check all fences against + * + * Checks the provided fence or, for a fence array, all fences in the array + * against the given context. Returns false if any fence is from a different + * context. + */ +bool dma_fence_match_context(struct dma_fence *fence, u64 context) +{ + struct dma_fence_array *array = to_dma_fence_array(fence); + unsigned i; + + if (!dma_fence_is_array(fence)) + return fence->context == context; + + for (i = 0; i < array->num_fences; i++) { + if (array->fences[i]->context != context) + return false; + } + + return true; +} +EXPORT_SYMBOL(dma_fence_match_context); diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h index 5900945f962d..332a5420243c 100644 --- a/include/linux/dma-fence-array.h +++ b/include/linux/dma-fence-array.h @@ -83,4 +83,6 @@ struct dma_fence_array *dma_fence_array_create(int num_fences, u64 context, unsigned seqno, bool signal_on_any); +bool dma_fence_match_context(struct dma_fence *fence, u64 context); + #endif /* __LINUX_DMA_FENCE_ARRAY_H */ |