2022-10-17 18:08:37

by Dmitry Osipenko

Subject: [PATCH v7 13/21] media: videobuf2: Prepare to dynamic dma-buf locking specification

Prepare V4L2 memory allocators to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.

Acked-by: Tomasz Figa <[email protected]>
Acked-by: Christian König <[email protected]>
Signed-off-by: Dmitry Osipenko <[email protected]>
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 ++++++-----
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 8 ++++----
drivers/media/common/videobuf2/videobuf2-vmalloc.c | 6 +++---
3 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index 678b359717c4..79f4d8301fbb 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -101,7 +101,7 @@ static void *vb2_dc_vaddr(struct vb2_buffer *vb, void *buf_priv)
if (buf->db_attach) {
struct iosys_map map;

- if (!dma_buf_vmap(buf->db_attach->dmabuf, &map))
+ if (!dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map))
buf->vaddr = map.vaddr;

return buf->vaddr;
@@ -711,7 +711,7 @@ static int vb2_dc_map_dmabuf(void *mem_priv)
}

/* get the associated scatterlist for this buffer */
- sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
+ sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
if (IS_ERR(sgt)) {
pr_err("Error getting dmabuf scatterlist\n");
return -EINVAL;
@@ -722,7 +722,8 @@ static int vb2_dc_map_dmabuf(void *mem_priv)
if (contig_size < buf->size) {
pr_err("contiguous chunk is too small %lu/%lu\n",
contig_size, buf->size);
- dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+ dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt,
+ buf->dma_dir);
return -EFAULT;
}

@@ -750,10 +751,10 @@ static void vb2_dc_unmap_dmabuf(void *mem_priv)
}

if (buf->vaddr) {
- dma_buf_vunmap(buf->db_attach->dmabuf, &map);
+ dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
buf->vaddr = NULL;
}
- dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+ dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);

buf->dma_addr = 0;
buf->dma_sgt = NULL;
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index fa69158a65b1..36ecdea8d707 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -309,7 +309,7 @@ static void *vb2_dma_sg_vaddr(struct vb2_buffer *vb, void *buf_priv)

if (!buf->vaddr) {
if (buf->db_attach) {
- ret = dma_buf_vmap(buf->db_attach->dmabuf, &map);
+ ret = dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map);
buf->vaddr = ret ? NULL : map.vaddr;
} else {
buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1);
@@ -565,7 +565,7 @@ static int vb2_dma_sg_map_dmabuf(void *mem_priv)
}

/* get the associated scatterlist for this buffer */
- sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
+ sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
if (IS_ERR(sgt)) {
pr_err("Error getting dmabuf scatterlist\n");
return -EINVAL;
@@ -594,10 +594,10 @@ static void vb2_dma_sg_unmap_dmabuf(void *mem_priv)
}

if (buf->vaddr) {
- dma_buf_vunmap(buf->db_attach->dmabuf, &map);
+ dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
buf->vaddr = NULL;
}
- dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+ dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);

buf->dma_sgt = NULL;
}
diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
index 948152f1596b..7831bf545874 100644
--- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
+++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
@@ -376,7 +376,7 @@ static int vb2_vmalloc_map_dmabuf(void *mem_priv)
struct iosys_map map;
int ret;

- ret = dma_buf_vmap(buf->dbuf, &map);
+ ret = dma_buf_vmap_unlocked(buf->dbuf, &map);
if (ret)
return -EFAULT;
buf->vaddr = map.vaddr;
@@ -389,7 +389,7 @@ static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
struct vb2_vmalloc_buf *buf = mem_priv;
struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);

- dma_buf_vunmap(buf->dbuf, &map);
+ dma_buf_vunmap_unlocked(buf->dbuf, &map);
buf->vaddr = NULL;
}

@@ -399,7 +399,7 @@ static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);

if (buf->vaddr)
- dma_buf_vunmap(buf->dbuf, &map);
+ dma_buf_vunmap_unlocked(buf->dbuf, &map);

kfree(buf);
}
--
2.37.3

2022-10-24 09:48:01

by Hans Verkuil

Subject: Re: [PATCH v7 13/21] media: videobuf2: Prepare to dynamic dma-buf locking specification

On 10/17/22 19:22, Dmitry Osipenko wrote:
> Prepare V4L2 memory allocators to the common dynamic dma-buf locking
> convention by starting to use the unlocked versions of dma-buf API
> functions.
>
> Acked-by: Tomasz Figa <[email protected]>

Acked-by: Hans Verkuil <[email protected]>

Thanks!

Hans

> Acked-by: Christian König <[email protected]>
> Signed-off-by: Dmitry Osipenko <[email protected]>
> ---
> drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 ++++++-----
> drivers/media/common/videobuf2/videobuf2-dma-sg.c | 8 ++++----
> drivers/media/common/videobuf2/videobuf2-vmalloc.c | 6 +++---
> 3 files changed, 13 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> index 678b359717c4..79f4d8301fbb 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> @@ -101,7 +101,7 @@ static void *vb2_dc_vaddr(struct vb2_buffer *vb, void *buf_priv)
> if (buf->db_attach) {
> struct iosys_map map;
>
> - if (!dma_buf_vmap(buf->db_attach->dmabuf, &map))
> + if (!dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map))
> buf->vaddr = map.vaddr;
>
> return buf->vaddr;
> @@ -711,7 +711,7 @@ static int vb2_dc_map_dmabuf(void *mem_priv)
> }
>
> /* get the associated scatterlist for this buffer */
> - sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
> + sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
> if (IS_ERR(sgt)) {
> pr_err("Error getting dmabuf scatterlist\n");
> return -EINVAL;
> @@ -722,7 +722,8 @@ static int vb2_dc_map_dmabuf(void *mem_priv)
> if (contig_size < buf->size) {
> pr_err("contiguous chunk is too small %lu/%lu\n",
> contig_size, buf->size);
> - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
> + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt,
> + buf->dma_dir);
> return -EFAULT;
> }
>
> @@ -750,10 +751,10 @@ static void vb2_dc_unmap_dmabuf(void *mem_priv)
> }
>
> if (buf->vaddr) {
> - dma_buf_vunmap(buf->db_attach->dmabuf, &map);
> + dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
> buf->vaddr = NULL;
> }
> - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
> + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);
>
> buf->dma_addr = 0;
> buf->dma_sgt = NULL;
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> index fa69158a65b1..36ecdea8d707 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> @@ -309,7 +309,7 @@ static void *vb2_dma_sg_vaddr(struct vb2_buffer *vb, void *buf_priv)
>
> if (!buf->vaddr) {
> if (buf->db_attach) {
> - ret = dma_buf_vmap(buf->db_attach->dmabuf, &map);
> + ret = dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map);
> buf->vaddr = ret ? NULL : map.vaddr;
> } else {
> buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1);
> @@ -565,7 +565,7 @@ static int vb2_dma_sg_map_dmabuf(void *mem_priv)
> }
>
> /* get the associated scatterlist for this buffer */
> - sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
> + sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
> if (IS_ERR(sgt)) {
> pr_err("Error getting dmabuf scatterlist\n");
> return -EINVAL;
> @@ -594,10 +594,10 @@ static void vb2_dma_sg_unmap_dmabuf(void *mem_priv)
> }
>
> if (buf->vaddr) {
> - dma_buf_vunmap(buf->db_attach->dmabuf, &map);
> + dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
> buf->vaddr = NULL;
> }
> - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
> + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);
>
> buf->dma_sgt = NULL;
> }
> diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> index 948152f1596b..7831bf545874 100644
> --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> @@ -376,7 +376,7 @@ static int vb2_vmalloc_map_dmabuf(void *mem_priv)
> struct iosys_map map;
> int ret;
>
> - ret = dma_buf_vmap(buf->dbuf, &map);
> + ret = dma_buf_vmap_unlocked(buf->dbuf, &map);
> if (ret)
> return -EFAULT;
> buf->vaddr = map.vaddr;
> @@ -389,7 +389,7 @@ static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
> struct vb2_vmalloc_buf *buf = mem_priv;
> struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>
> - dma_buf_vunmap(buf->dbuf, &map);
> + dma_buf_vunmap_unlocked(buf->dbuf, &map);
> buf->vaddr = NULL;
> }
>
> @@ -399,7 +399,7 @@ static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
> struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>
> if (buf->vaddr)
> - dma_buf_vunmap(buf->dbuf, &map);
> + dma_buf_vunmap_unlocked(buf->dbuf, &map);
>
> kfree(buf);
> }