diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-core.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index db1235dcb32..7d833eefaf4 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -54,10 +54,15 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb) void *mem_priv; int plane; - /* Allocate memory for all planes in this buffer */ + /* + * Allocate memory for all planes in this buffer + * NOTE: mmapped areas should be page aligned + */ for (plane = 0; plane < vb->num_planes; ++plane) { + unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]); + mem_priv = call_memop(q, alloc, q->alloc_ctx[plane], - q->plane_sizes[plane]); + size, q->gfp_flags); if (IS_ERR_OR_NULL(mem_priv)) goto free; @@ -403,7 +408,7 @@ static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b) * Clear any buffer state related flags. */ b->flags &= ~V4L2_BUFFER_MASK_FLAGS; - b->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + b->flags |= q->timestamp_type; switch (vb->state) { case VB2_BUF_STATE_QUEUED: @@ -855,7 +860,7 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state) return; dprintk(4, "Done processing on buffer %d, state: %d\n", - vb->v4l2_buf.index, vb->state); + vb->v4l2_buf.index, state); /* sync buffers */ for (plane = 0; plane < vb->num_planes; ++plane) @@ -1852,6 +1857,7 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) struct vb2_buffer *vb; unsigned int buffer, plane; int ret; + unsigned long length; if (q->memory != V4L2_MEMORY_MMAP) { dprintk(1, "Queue is not currently set up for mmap\n"); @@ -1886,6 +1892,18 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) vb = q->bufs[buffer]; + /* + * MMAP requires page_aligned buffers. + * The buffer length was page_aligned at __vb2_buf_mem_alloc(), + * so, we need to do the same here. + */ + length = PAGE_ALIGN(vb->v4l2_planes[plane].length); + if (length < (vma->vm_end - vma->vm_start)) { + dprintk(1, + "MMAP invalid, as it would overflow buffer length\n"); + return -EINVAL; + } + ret = call_memop(q, mmap, vb->planes[plane].mem_priv, vma); if (ret) return ret; @@ -2039,9 +2057,13 @@ int vb2_queue_init(struct vb2_queue *q) WARN_ON(!q->type) || WARN_ON(!q->io_modes) || WARN_ON(!q->ops->queue_setup) || - WARN_ON(!q->ops->buf_queue)) + WARN_ON(!q->ops->buf_queue) || + WARN_ON(q->timestamp_type & ~V4L2_BUF_FLAG_TIMESTAMP_MASK)) return -EINVAL; + /* Warn that the driver should choose an appropriate timestamp type */ + WARN_ON(q->timestamp_type == V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN); + INIT_LIST_HEAD(&q->queued_list); INIT_LIST_HEAD(&q->done_list); spin_lock_init(&q->done_lock); |