[PATCHv3 4/8] videobuf2: move cache_hints handling to allocators

Sergey Senozhatsky
2021-07-09T09:20:50Z

This moves cache hints handling from videobuf2 core down
to allocators level, because allocators do the sync/flush
caches eventually and may take better decisions. Besides,
allocators already decide whether cache sync/flush should
be done or can be skipped. This patch moves the scattered
buffer cache sync logic to one common place.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
drivers/media/common/videobuf2/videobuf2-core.c | 6 ------
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 6 ++++++
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 6 ++++++
3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 76210c006958..55af63d54f23 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -328,9 +328,6 @@ static void __vb2_buf_mem_prepare(struct vb2_buffer *vb)
return;

vb->synced = 1;
- if (vb->skip_cache_sync_on_prepare)
- return;
-
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
}
@@ -347,9 +344,6 @@ static void __vb2_buf_mem_finish(struct vb2_buffer *vb)
return;

vb->synced = 0;
- if (vb->skip_cache_sync_on_finish)
- return;
-
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, finish, vb->planes[plane].mem_priv);
}
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index 019c3843dc6d..1e218bc440c6 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -101,6 +101,9 @@ static void vb2_dc_prepare(void *buf_priv)
struct vb2_dc_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;

+ if (buf->vb->skip_cache_sync_on_prepare)
+ return;
+
if (!sgt)
return;

@@ -112,6 +115,9 @@ static void vb2_dc_finish(void *buf_priv)
struct vb2_dc_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;

+ if (buf->vb->skip_cache_sync_on_finish)
+ return;
+
if (!sgt)
return;

diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 50265080cfc8..33ee63a99139 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -204,6 +204,9 @@ static void vb2_dma_sg_prepare(void *buf_priv)
struct vb2_dma_sg_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;

+ if (buf->vb->skip_cache_sync_on_prepare)
+ return;
+
dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir);
}

@@ -212,6 +215,9 @@ static void vb2_dma_sg_finish(void *buf_priv)
struct vb2_dma_sg_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;

+ if (buf->vb->skip_cache_sync_on_finish)
+ return;
+
dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir);
}

--
2.32.0.93.g670b81a890-goog