*
*/
-void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type)
+static void
+uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type)
{
mutex_init(&queue->mutex);
spin_lock_init(&queue->irqlock);
queue->type = type;
}
+/*
+ * Free the video buffers.
+ *
+ * This function must be called with the queue lock held.
+ */
+static int uvc_free_buffers(struct uvc_video_queue *queue)
+{
+ unsigned int i;
+
+ for (i = 0; i < queue->count; ++i) {
+ if (queue->buffer[i].vma_use_count != 0)
+ return -EBUSY;
+ }
+
+ if (queue->count) {
+ vfree(queue->mem);
+ queue->count = 0;
+ }
+
+ return 0;
+}
+
/*
* Allocate the video buffers.
*
*
* Buffers will be individually mapped, so they must all be page aligned.
*/
-int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers,
- unsigned int buflength)
+static int
+uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers,
+ unsigned int buflength)
{
unsigned int bufsize = PAGE_ALIGN(buflength);
unsigned int i;
return ret;
}
-/*
- * Free the video buffers.
- *
- * This function must be called with the queue lock held.
- */
-int uvc_free_buffers(struct uvc_video_queue *queue)
-{
- unsigned int i;
-
- for (i = 0; i < queue->count; ++i) {
- if (queue->buffer[i].vma_use_count != 0)
- return -EBUSY;
- }
-
- if (queue->count) {
- vfree(queue->mem);
- queue->count = 0;
- }
-
- return 0;
-}
-
static void __uvc_query_buffer(struct uvc_buffer *buf,
struct v4l2_buffer *v4l2_buf)
{
}
}
-int uvc_query_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf)
+static int
+uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf)
{
int ret = 0;
* Queue a video buffer. Attempting to queue a buffer that has already been
* queued will return -EINVAL.
*/
-int uvc_queue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf)
+static int
+uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf)
{
struct uvc_buffer *buf;
unsigned long flags;
* Dequeue a video buffer. If nonblocking is false, block until a buffer is
* available.
*/
-int uvc_dequeue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf, int nonblocking)
+static int
+uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf,
+ int nonblocking)
{
struct uvc_buffer *buf;
int ret = 0;
* This function implements video queue polling and is intended to be used by
* the device poll handler.
*/
-unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
- poll_table *wait)
+static unsigned int
+uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
+ poll_table *wait)
{
struct uvc_buffer *buf;
unsigned int mask = 0;
* This function implements video buffer memory mapping and is intended to be
* used by the device mmap handler.
*/
-int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
+static int
+uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
{
struct uvc_buffer *uninitialized_var(buffer);
struct page *page;
return ret;
}
+/*
+ * Cancel the video buffers queue.
+ *
+ * Cancelling the queue marks all buffers on the irq queue as erroneous,
+ * wakes them up and removes them from the queue.
+ *
+ * If the disconnect parameter is set, further calls to uvc_queue_buffer will
+ * fail with -ENODEV.
+ *
+ * This function acquires the irq spinlock and can be called from interrupt
+ * context.
+ */
+static void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
+{
+ struct uvc_buffer *buf;
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ while (!list_empty(&queue->irqqueue)) {
+ buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
+ queue);
+ list_del(&buf->queue);
+ buf->state = UVC_BUF_STATE_ERROR;
+ wake_up(&buf->wait);
+ }
+ /* This must be protected by the irqlock spinlock to avoid race
+ * conditions between uvc_queue_buffer and the disconnection event that
+ * could result in an interruptible wait in uvc_dequeue_buffer. Do not
+ * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED
+ * state outside the queue code.
+ */
+ if (disconnect)
+ queue->flags |= UVC_QUEUE_DISCONNECTED;
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+}
+
/*
* Enable or disable the video buffers queue.
*
* This function can't be called from interrupt context. Use
* uvc_queue_cancel() instead.
*/
-int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
+static int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
{
unsigned int i;
int ret = 0;
return ret;
}
-/*
- * Cancel the video buffers queue.
- *
- * Cancelling the queue marks all buffers on the irq queue as erroneous,
- * wakes them up and removes them from the queue.
- *
- * If the disconnect parameter is set, further calls to uvc_queue_buffer will
- * fail with -ENODEV.
- *
- * This function acquires the irq spinlock and can be called from interrupt
- * context.
- */
-void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
-{
- struct uvc_buffer *buf;
- unsigned long flags;
-
- spin_lock_irqsave(&queue->irqlock, flags);
- while (!list_empty(&queue->irqqueue)) {
- buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
- queue);
- list_del(&buf->queue);
- buf->state = UVC_BUF_STATE_ERROR;
- wake_up(&buf->wait);
- }
- /* This must be protected by the irqlock spinlock to avoid race
- * conditions between uvc_queue_buffer and the disconnection event that
- * could result in an interruptible wait in uvc_dequeue_buffer. Do not
- * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED
- * state outside the queue code.
- */
- if (disconnect)
- queue->flags |= UVC_QUEUE_DISCONNECTED;
- spin_unlock_irqrestore(&queue->irqlock, flags);
-}
-
-struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
- struct uvc_buffer *buf)
+static struct uvc_buffer *
+uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf)
{
struct uvc_buffer *nextbuf;
unsigned long flags;
return nextbuf;
}
-struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue)
+static struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue)
{
struct uvc_buffer *buf = NULL;
struct list_head irqqueue;
};
-extern void uvc_queue_init(struct uvc_video_queue *queue,
- enum v4l2_buf_type type);
-extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
- unsigned int nbuffers, unsigned int buflength);
-extern int uvc_free_buffers(struct uvc_video_queue *queue);
-extern int uvc_query_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf);
-extern int uvc_queue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf);
-extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf, int nonblocking);
-extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
-extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
-extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
- struct uvc_buffer *buf);
-extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
- struct file *file, poll_table *wait);
-extern int uvc_queue_mmap(struct uvc_video_queue *queue,
- struct vm_area_struct *vma);
static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
return queue->flags & UVC_QUEUE_STREAMING;
}
-extern struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue);
#endif /* __KERNEL__ */
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff