[PATCHv9 12/25] v4l: vb2-vmalloc: add support for dmabuf importing
This patch adds support for importing DMABUF files for
vmalloc allocator in Videobuf2.
Signed-off-by: Tomasz Stanislawski
Signed-off-by: Kyungmin Park
Acked-by: Laurent Pinchart
---
drivers/media/video/videobuf2-vmalloc.c | 56 +++
1 file changed, 56 insertions(+)
diff --git a/drivers/media/video/videobuf2-vmalloc.c
b/drivers/media/video/videobuf2-vmalloc.c
index 6b5ca6c..e91449c 100644
--- a/drivers/media/video/videobuf2-vmalloc.c
+++ b/drivers/media/video/videobuf2-vmalloc.c
@@ -29,6 +29,7 @@ struct vb2_vmalloc_buf {
unsigned intn_pages;
atomic_trefcount;
struct vb2_vmarea_handler handler;
+ struct dma_buf *dbuf;
};
static void vb2_vmalloc_put(void *buf_priv);
@@ -206,11 +207,66 @@ static int vb2_vmalloc_mmap(void *buf_priv, struct
vm_area_struct *vma)
return 0;
}
+/*/
+/* callbacks for DMABUF buffers*/
+/*/
+
+static int vb2_vmalloc_map_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ buf->vaddr = dma_buf_vmap(buf->dbuf);
+
+ return buf->vaddr ? 0 : -EFAULT;
+}
+
+static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ dma_buf_vunmap(buf->dbuf, buf->vaddr);
+ buf->vaddr = NULL;
+}
+
+static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ if (buf->vaddr)
+ dma_buf_vunmap(buf->dbuf, buf->vaddr);
+
+ kfree(buf);
+}
+
+static void *vb2_vmalloc_attach_dmabuf(void *alloc_ctx, struct dma_buf *dbuf,
+ unsigned long size, int write)
+{
+ struct vb2_vmalloc_buf *buf;
+
+ if (dbuf->size < size)
+ return ERR_PTR(-EFAULT);
+
+ buf = kzalloc(sizeof(*buf), GFP_KERNEL);
+ if (!buf)
+ return ERR_PTR(-ENOMEM);
+
+ buf->dbuf = dbuf;
+ buf->write = write;
+ buf->size = size;
+
+ return buf;
+}
+
+
const struct vb2_mem_ops vb2_vmalloc_memops = {
.alloc = vb2_vmalloc_alloc,
.put= vb2_vmalloc_put,
.get_userptr= vb2_vmalloc_get_userptr,
.put_userptr= vb2_vmalloc_put_userptr,
+ .map_dmabuf = vb2_vmalloc_map_dmabuf,
+ .unmap_dmabuf = vb2_vmalloc_unmap_dmabuf,
+ .attach_dmabuf = vb2_vmalloc_attach_dmabuf,
+ .detach_dmabuf = vb2_vmalloc_detach_dmabuf,
.vaddr = vb2_vmalloc_vaddr,
.mmap = vb2_vmalloc_mmap,
.num_users = vb2_vmalloc_num_users,
--
1.7.9.5
[PATCHv9 12/25] v4l: vb2-vmalloc: add support for dmabuf importing
This patch adds support for importing DMABUF files for
vmalloc allocator in Videobuf2.
Signed-off-by: Tomasz Stanislawski t.stanisl...@samsung.com
Signed-off-by: Kyungmin Park kyungmin.p...@samsung.com
Acked-by: Laurent Pinchart laurent.pinch...@ideasonboard.com
---
drivers/media/video/videobuf2-vmalloc.c | 56 +++
1 file changed, 56 insertions(+)
diff --git a/drivers/media/video/videobuf2-vmalloc.c
b/drivers/media/video/videobuf2-vmalloc.c
index 6b5ca6c..e91449c 100644
--- a/drivers/media/video/videobuf2-vmalloc.c
+++ b/drivers/media/video/videobuf2-vmalloc.c
@@ -29,6 +29,7 @@ struct vb2_vmalloc_buf {
unsigned intn_pages;
atomic_trefcount;
struct vb2_vmarea_handler handler;
+ struct dma_buf *dbuf;
};
static void vb2_vmalloc_put(void *buf_priv);
@@ -206,11 +207,66 @@ static int vb2_vmalloc_mmap(void *buf_priv, struct
vm_area_struct *vma)
return 0;
}
+/*/
+/* callbacks for DMABUF buffers*/
+/*/
+
+static int vb2_vmalloc_map_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ buf-vaddr = dma_buf_vmap(buf-dbuf);
+
+ return buf-vaddr ? 0 : -EFAULT;
+}
+
+static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ dma_buf_vunmap(buf-dbuf, buf-vaddr);
+ buf-vaddr = NULL;
+}
+
+static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
+{
+ struct vb2_vmalloc_buf *buf = mem_priv;
+
+ if (buf-vaddr)
+ dma_buf_vunmap(buf-dbuf, buf-vaddr);
+
+ kfree(buf);
+}
+
+static void *vb2_vmalloc_attach_dmabuf(void *alloc_ctx, struct dma_buf *dbuf,
+ unsigned long size, int write)
+{
+ struct vb2_vmalloc_buf *buf;
+
+ if (dbuf-size size)
+ return ERR_PTR(-EFAULT);
+
+ buf = kzalloc(sizeof(*buf), GFP_KERNEL);
+ if (!buf)
+ return ERR_PTR(-ENOMEM);
+
+ buf-dbuf = dbuf;
+ buf-write = write;
+ buf-size = size;
+
+ return buf;
+}
+
+
const struct vb2_mem_ops vb2_vmalloc_memops = {
.alloc = vb2_vmalloc_alloc,
.put= vb2_vmalloc_put,
.get_userptr= vb2_vmalloc_get_userptr,
.put_userptr= vb2_vmalloc_put_userptr,
+ .map_dmabuf = vb2_vmalloc_map_dmabuf,
+ .unmap_dmabuf = vb2_vmalloc_unmap_dmabuf,
+ .attach_dmabuf = vb2_vmalloc_attach_dmabuf,
+ .detach_dmabuf = vb2_vmalloc_detach_dmabuf,
.vaddr = vb2_vmalloc_vaddr,
.mmap = vb2_vmalloc_mmap,
.num_users = vb2_vmalloc_num_users,
--
1.7.9.5
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