The patch titled
videobuf-dma-contig: zero copy USERPTR V3 comments
has been added to the -mm tree. Its filename is
videobuf-dma-contig-zero-copy-userptr-support-v3-comments.patch
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------------------------------------------------------
Subject: videobuf-dma-contig: zero copy USERPTR V3 comments
From: Magnus Damm <damm@xxxxxxxxxx>
This patch adds function descriptions to V3 of the V4L2
videobuf-dma-contig USERPTR zero copy patch.
Signed-off-by: Magnus Damm <damm@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Cc: Hans Verkuil <hverkuil@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/media/video/videobuf-dma-contig.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff -puN drivers/media/video/videobuf-dma-contig.c~videobuf-dma-contig-zero-copy-userptr-support-v3-comments drivers/media/video/videobuf-dma-contig.c
--- a/drivers/media/video/videobuf-dma-contig.c~videobuf-dma-contig-zero-copy-userptr-support-v3-comments
+++ a/drivers/media/video/videobuf-dma-contig.c
@@ -110,6 +110,12 @@ static struct vm_operations_struct video
.close = videobuf_vm_close,
};
+/**
+ * videobuf_dma_contig_user_put() - reset pointer to user space buffer
+ * @mem: per-buffer private videobuf-dma-contig data
+ *
+ * This function resets the user space pointer
+ */
static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
{
mem->is_userptr = 0;
@@ -117,6 +123,16 @@ static void videobuf_dma_contig_user_put
mem->size = 0;
}
+/**
+ * videobuf_dma_contig_user_get() - setup user space memory pointer
+ * @mem: per-buffer private videobuf-dma-contig data
+ * @vb: video buffer to map
+ *
+ * This function validates and sets up a pointer to user space memory.
+ * Only physically contiguous pfn-mapped memory is accepted.
+ *
+ * Returns 0 if successful.
+ */
static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
struct videobuf_buffer *vb)
{
_
Patches currently in -mm which might be from damm@xxxxxxxxxx are
linux-next.patch
videobuf-dma-contig-zero-copy-userptr-support-v3.patch
videobuf-dma-contig-zero-copy-userptr-support-v3-comments.patch
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