diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-dma-sg.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-dma-sg.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c index 0566e94a5a1d..b1838abb6d00 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c @@ -107,6 +107,9 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, struct sg_table *sgt; int ret; int num_pages; + DEFINE_DMA_ATTRS(attrs); + + dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); if (WARN_ON(alloc_ctx == NULL)) return NULL; @@ -140,9 +143,13 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, buf->dev = get_device(conf->dev); sgt = &buf->sg_table; - if (dma_map_sg(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir) == 0) + /* + * No need to sync to the device, this will happen later when the + * prepare() memop is called. + */ + if (dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->nents, + buf->dma_dir, &attrs) == 0) goto fail_map; - dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); buf->handler.refcount = &buf->refcount; buf->handler.put = vb2_dma_sg_put; @@ -175,9 +182,13 @@ static void vb2_dma_sg_put(void *buf_priv) int i = buf->num_pages; if (atomic_dec_and_test(&buf->refcount)) { + DEFINE_DMA_ATTRS(attrs); + + dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); dprintk(1, "%s: Freeing buffer of %d pages\n", __func__, buf->num_pages); - dma_unmap_sg(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); + dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->nents, + buf->dma_dir, &attrs); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->num_pages); sg_free_table(buf->dma_sgt); @@ -228,6 +239,9 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, int num_pages_from_user; struct vm_area_struct *vma; struct sg_table *sgt; + DEFINE_DMA_ATTRS(attrs); + + dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); buf = kzalloc(sizeof *buf, GFP_KERNEL); if (!buf) @@ -296,9 +310,13 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, goto userptr_fail_alloc_table_from_pages; sgt = &buf->sg_table; - if (dma_map_sg(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir) == 0) + /* + * No need to sync to the device, this will happen later when the + * prepare() memop is called. + */ + if (dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->nents, + buf->dma_dir, &attrs) == 0) goto userptr_fail_map; - dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); return buf; userptr_fail_map: @@ -327,10 +345,13 @@ static void vb2_dma_sg_put_userptr(void *buf_priv) struct vb2_dma_sg_buf *buf = buf_priv; struct sg_table *sgt = &buf->sg_table; int i = buf->num_pages; + DEFINE_DMA_ATTRS(attrs); + + dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); dprintk(1, "%s: Releasing userspace buffer of %d pages\n", __func__, buf->num_pages); - dma_unmap_sg(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); + dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir, &attrs); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->num_pages); sg_free_table(buf->dma_sgt); |