[PATCH] dma-buf: add dma_data_direction to unmap dma_buf_op
Sumit Semwal
sumit.semwal at ti.com
Fri Jan 27 01:43:28 PST 2012
Some exporters may use DMA map/unmap APIs in dma-buf ops, which require
enum dma_data_direction for both map and unmap operations.
Thus, the unmap dma_buf_op also needs to have enum dma_data_direction as
a parameter.
Reported-by: Tomasz Stanislawski <t.stanislaws at samsung.com>
Signed-off-by: Sumit Semwal <sumit.semwal at ti.com>
---
drivers/base/dma-buf.c | 7 +++++--
include/linux/dma-buf.h | 8 +++++---
2 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 8afe2dd..c9a945f 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -271,16 +271,19 @@ EXPORT_SYMBOL_GPL(dma_buf_map_attachment);
* dma_buf_ops.
* @attach: [in] attachment to unmap buffer from
* @sg_table: [in] scatterlist info of the buffer to unmap
+ * @direction: [in] direction of DMA transfer
*
*/
void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
- struct sg_table *sg_table)
+ struct sg_table *sg_table,
+ enum dma_data_direction direction)
{
if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
return;
mutex_lock(&attach->dmabuf->lock);
- attach->dmabuf->ops->unmap_dma_buf(attach, sg_table);
+ attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,
+ direction);
mutex_unlock(&attach->dmabuf->lock);
}
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 86f6241..847b026 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -63,7 +63,8 @@ struct dma_buf_ops {
struct sg_table * (*map_dma_buf)(struct dma_buf_attachment *,
enum dma_data_direction);
void (*unmap_dma_buf)(struct dma_buf_attachment *,
- struct sg_table *);
+ struct sg_table *,
+ enum dma_data_direction);
/* TODO: Add try_map_dma_buf version, to return immed with -EBUSY
* if the call would block.
*/
@@ -122,7 +123,8 @@ void dma_buf_put(struct dma_buf *dmabuf);
struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *,
enum dma_data_direction);
-void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *);
+void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *,
+ enum dma_data_direction);
#else
static inline struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
@@ -166,7 +168,7 @@ static inline struct sg_table *dma_buf_map_attachment(
}
static inline void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
- struct sg_table *sg)
+ struct sg_table *sg, enum dma_data_direction write)
{
return;
}
--
1.7.5.4
More information about the dri-devel
mailing list