diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-dma-sg.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-dma-sg.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c index 25c3b360e1a..16ae3dcc7e2 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c @@ -21,6 +21,15 @@ #include <media/videobuf2-memops.h> #include <media/videobuf2-dma-sg.h> +static int debug; +module_param(debug, int, 0644); + +#define dprintk(level, fmt, arg...) \ + do { \ + if (debug >= level) \ + printk(KERN_DEBUG "vb2-dma-sg: " fmt, ## arg); \ + } while (0) + struct vb2_dma_sg_buf { void *vaddr; struct page **pages; @@ -33,7 +42,7 @@ struct vb2_dma_sg_buf { static void vb2_dma_sg_put(void *buf_priv); -static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size) +static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags) { struct vb2_dma_sg_buf *buf; int i; @@ -46,7 +55,8 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size) buf->write = 0; buf->offset = 0; buf->sg_desc.size = size; - buf->sg_desc.num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; + /* size is already page aligned */ + buf->sg_desc.num_pages = size >> PAGE_SHIFT; buf->sg_desc.sglist = vzalloc(buf->sg_desc.num_pages * sizeof(*buf->sg_desc.sglist)); @@ -60,7 +70,8 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size) goto fail_pages_array_alloc; for (i = 0; i < buf->sg_desc.num_pages; ++i) { - buf->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO | __GFP_NOWARN); + buf->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO | + __GFP_NOWARN | gfp_flags); if (NULL == buf->pages[i]) goto fail_pages_alloc; sg_set_page(&buf->sg_desc.sglist[i], @@ -73,7 +84,7 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size) atomic_inc(&buf->refcount); - printk(KERN_DEBUG "%s: Allocated buffer of %d pages\n", + dprintk(1, "%s: Allocated buffer of %d pages\n", __func__, buf->sg_desc.num_pages); return buf; @@ -96,7 +107,7 @@ static void vb2_dma_sg_put(void *buf_priv) int i = buf->sg_desc.num_pages; if (atomic_dec_and_test(&buf->refcount)) { - printk(KERN_DEBUG "%s: Freeing buffer of %d pages\n", __func__, + dprintk(1, "%s: Freeing buffer of %d pages\n", __func__, buf->sg_desc.num_pages); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->sg_desc.num_pages); @@ -162,7 +173,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, return buf; userptr_fail_get_user_pages: - printk(KERN_DEBUG "get_user_pages requested/got: %d/%d]\n", + dprintk(1, "get_user_pages requested/got: %d/%d]\n", num_pages_from_user, buf->sg_desc.num_pages); while (--num_pages_from_user >= 0) put_page(buf->pages[num_pages_from_user]); @@ -185,7 +196,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv) struct vb2_dma_sg_buf *buf = buf_priv; int i = buf->sg_desc.num_pages; - printk(KERN_DEBUG "%s: Releasing userspace buffer of %d pages\n", + dprintk(1, "%s: Releasing userspace buffer of %d pages\n", __func__, buf->sg_desc.num_pages); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->sg_desc.num_pages); |