diff options
| author | Greg Hackmann <ghackmann@google.com> | 2019-06-13 15:34:07 -0700 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2019-06-14 15:00:51 +0530 |
| commit | bb2bb903042517b8fb17b2bc21e00512f2dcac01 (patch) | |
| tree | cae5b81f60ea2d1ceefd2e2d3bfe3fd4e8aa63da /include/uapi/linux/dma-buf.h | |
| parent | ed63bb1d1f8469586006a9ca63c42344401aa2ab (diff) | |
dma-buf: add DMA_BUF_SET_NAME ioctls
This patch adds complimentary DMA_BUF_SET_NAME ioctls, which lets
userspace processes attach a free-form name to each buffer.
This information can be extremely helpful for tracking and accounting
shared buffers. For example, on Android, we know what each buffer will
be used for at allocation time: GL, multimedia, camera, etc. The
userspace allocator can use DMA_BUF_SET_NAME to associate that
information with the buffer, so we can later give developers a
breakdown of how much memory they're allocating for graphics, camera,
etc.
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190613223408.139221-3-fengc@google.com
Diffstat (limited to 'include/uapi/linux/dma-buf.h')
| -rw-r--r-- | include/uapi/linux/dma-buf.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/dma-buf.h b/include/uapi/linux/dma-buf.h index d75df5210a4a..dbc7092e04b5 100644 --- a/include/uapi/linux/dma-buf.h +++ b/include/uapi/linux/dma-buf.h @@ -35,7 +35,10 @@ struct dma_buf_sync { #define DMA_BUF_SYNC_VALID_FLAGS_MASK \ (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END) +#define DMA_BUF_NAME_LEN 32 + #define DMA_BUF_BASE 'b' #define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync) +#define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 1, const char *) #endif |