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dma-buf: Remove range-based flush

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This patch removes range-based information used for optimizations in
begin_cpu_access and end_cpu_access.

We don't have any user nor implementation using range-based flush. It seems a
consensus that if we ever want something like that again (or even more robust
using 2D, 3D sub-range regions) we can use the upcoming dma-buf sync ioctl for
such.

Cc: Sumit Semwal <[email protected]>
Cc: Daniel Vetter <[email protected]>
Signed-off-by: Tiago Vignatti <[email protected]>
Reviewed-by: Stéphane Marchesin <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Tiago Vignatti 2015-12-22 19:36:45 -02:00 • committed by Daniel Vetter
commit 831e9da7dc
8 changed files with 24 additions and 38 deletions
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13
drivers/dma-buf/dma-buf.c
View file

@ -539,13 +539,11 @@ EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment);
* preparations. Coherency is only guaranteed in the specified range for the
* specified access direction.
* @dmabuf: [in] buffer to prepare cpu access for.
* @start: [in] start of range for cpu access.
* @len: [in] length of range for cpu access.
* @direction: [in] length of range for cpu access.
*
* Can return negative error values, returns 0 on success.
*/
int dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start, size_t len,
int dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
enum dma_data_direction direction)
{
int ret = 0;
@ -554,8 +552,7 @@ int dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start, size_t len,
return -EINVAL;
if (dmabuf->ops->begin_cpu_access)
ret = dmabuf->ops->begin_cpu_access(dmabuf, start,
len, direction);
ret = dmabuf->ops->begin_cpu_access(dmabuf, direction);
return ret;
}
@ -567,19 +564,17 @@ EXPORT_SYMBOL_GPL(dma_buf_begin_cpu_access);
* actions. Coherency is only guaranteed in the specified range for the
* specified access direction.
* @dmabuf: [in] buffer to complete cpu access for.
* @start: [in] start of range for cpu access.
* @len: [in] length of range for cpu access.
* @direction: [in] length of range for cpu access.
*
* This call must always succeed.
*/
void dma_buf_end_cpu_access(struct dma_buf *dmabuf, size_t start, size_t len,
void dma_buf_end_cpu_access(struct dma_buf *dmabuf,
enum dma_data_direction direction)
{
WARN_ON(!dmabuf);
if (dmabuf->ops->end_cpu_access)
dmabuf->ops->end_cpu_access(dmabuf, start, len, direction);
dmabuf->ops->end_cpu_access(dmabuf, direction);
}
EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access);