diff options
| -rw-r--r-- | drivers/media/video/uvc/uvc_queue.c | 34 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_v4l2.c | 17 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvcvideo.h | 4 |
3 files changed, 54 insertions, 1 deletions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index f14581bd707f..109a06384a8f 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -424,7 +424,7 @@ int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma) break; } - if (i == queue->count || size != queue->buf_size) { + if (i == queue->count || PAGE_ALIGN(size) != queue->buf_size) { ret = -EINVAL; goto done; } @@ -436,6 +436,7 @@ int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma) vma->vm_flags |= VM_IO; addr = (unsigned long)queue->mem + buffer->buf.m.offset; +#ifdef CONFIG_MMU while (size > 0) { page = vmalloc_to_page((void *)addr); if ((ret = vm_insert_page(vma, start, page)) < 0) @@ -445,6 +446,7 @@ int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma) addr += PAGE_SIZE; size -= PAGE_SIZE; } +#endif vma->vm_ops = &uvc_vm_ops; vma->vm_private_data = buffer; @@ -488,6 +490,36 @@ done: return mask; } +#ifndef CONFIG_MMU +/* + * Get unmapped area. + * + * NO-MMU arch need this function to make mmap() work correctly. + */ +unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, + unsigned long pgoff) +{ + struct uvc_buffer *buffer; + unsigned int i; + unsigned long ret; + + mutex_lock(&queue->mutex); + for (i = 0; i < queue->count; ++i) { + buffer = &queue->buffer[i]; + if ((buffer->buf.m.offset >> PAGE_SHIFT) == pgoff) + break; + } + if (i == queue->count) { + ret = -EINVAL; + goto done; + } + ret = (unsigned long)queue->mem + buffer->buf.m.offset; +done: + mutex_unlock(&queue->mutex); + return ret; +} +#endif + /* * Enable or disable the video buffers queue. * diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 6e8aad44c4bd..543a80395b7f 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -1114,6 +1114,20 @@ static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) return uvc_queue_poll(&stream->queue, file, wait); } +#ifndef CONFIG_MMU +static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, + unsigned long addr, unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct uvc_fh *handle = file->private_data; + struct uvc_streaming *stream = handle->stream; + + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); + + return uvc_queue_get_unmapped_area(&stream->queue, pgoff); +} +#endif + const struct v4l2_file_operations uvc_fops = { .owner = THIS_MODULE, .open = uvc_v4l2_open, @@ -1122,5 +1136,8 @@ const struct v4l2_file_operations uvc_fops = { .read = uvc_v4l2_read, .mmap = uvc_v4l2_mmap, .poll = uvc_v4l2_poll, +#ifndef CONFIG_MMU + .get_unmapped_area = uvc_v4l2_get_unmapped_area, +#endif }; diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index 38dd4e18a2ca..0275613c5f33 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -600,6 +600,10 @@ extern int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, poll_table *wait); +#ifndef CONFIG_MMU +extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, + unsigned long pgoff); +#endif extern int uvc_queue_allocated(struct uvc_video_queue *queue); static inline int uvc_queue_streaming(struct uvc_video_queue *queue) { |