From: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Group functions by buffer type.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
---
drivers/media/video/videobuf2-dma-contig.c | 92 ++++++++++++++++-----------
1 files changed, 54 insertions(+), 38 deletions(-)
diff --git a/drivers/media/video/videobuf2-dma-contig.c
b/drivers/media/video/videobuf2-dma-contig.c
index ff0a662..476e536 100644
--- a/drivers/media/video/videobuf2-dma-contig.c
+++ b/drivers/media/video/videobuf2-dma-contig.c
@@ -20,14 +20,56 @@
struct vb2_dc_buf {
struct device *dev;
void *vaddr;
- dma_addr_t dma_addr;
unsigned long size;
- struct vm_area_struct *vma;
- atomic_t refcount;
+ dma_addr_t dma_addr;
+
+ /* MMAP related */
struct vb2_vmarea_handler handler;
+ atomic_t refcount;
+
+ /* USERPTR related */
+ struct vm_area_struct *vma;
};
-static void vb2_dc_put(void *buf_priv);
+/*********************************************/
+/* callbacks for all buffers */
+/*********************************************/
+
+static void *vb2_dc_cookie(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+
+ return &buf->dma_addr;
+}
+
+static void *vb2_dc_vaddr(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+
+ return buf->vaddr;
+}
+
+static unsigned int vb2_dc_num_users(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+
+ return atomic_read(&buf->refcount);
+}
+
+/*********************************************/
+/* callbacks for MMAP buffers */
+/*********************************************/
+
+static void vb2_dc_put(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+
+ if (!atomic_dec_and_test(&buf->refcount))
+ return;
+
+ dma_free_coherent(buf->dev, buf->size, buf->vaddr, buf->dma_addr);
+ kfree(buf);
+}
static void *vb2_dc_alloc(void *alloc_ctx, unsigned long size)
{
@@ -57,40 +99,6 @@ static void *vb2_dc_alloc(void *alloc_ctx, unsigned long
size)
return buf;
}
-static void vb2_dc_put(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- if (atomic_dec_and_test(&buf->refcount)) {
- dma_free_coherent(buf->dev, buf->size, buf->vaddr,
- buf->dma_addr);
- kfree(buf);
- }
-}
-
-static void *vb2_dc_cookie(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- return &buf->dma_addr;
-}
-
-static void *vb2_dc_vaddr(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
- if (!buf)
- return 0;
-
- return buf->vaddr;
-}
-
-static unsigned int vb2_dc_num_users(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- return atomic_read(&buf->refcount);
-}
-
static int vb2_dc_mmap(void *buf_priv, struct vm_area_struct *vma)
{
struct vb2_dc_buf *buf = buf_priv;
@@ -104,6 +112,10 @@ static int vb2_dc_mmap(void *buf_priv, struct
vm_area_struct *vma)
&vb2_common_vm_ops, &buf->handler);
}
+/*********************************************/
+/* callbacks for USERPTR buffers */
+/*********************************************/
+
static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned long vaddr,
unsigned long size, int write)
{
@@ -142,6 +154,10 @@ static void vb2_dc_put_userptr(void *mem_priv)
kfree(buf);
}
+/*********************************************/
+/* DMA CONTIG exported functions */
+/*********************************************/
+
const struct vb2_mem_ops vb2_dma_contig_memops = {
.alloc = vb2_dc_alloc,
.put = vb2_dc_put,
--
1.7.5.4
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