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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/usb/gadget/function/uvc_queue.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/usb/gadget/function/uvc_queue.h')
-rw-r--r-- | kernel/drivers/usb/gadget/function/uvc_queue.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/kernel/drivers/usb/gadget/function/uvc_queue.h b/kernel/drivers/usb/gadget/function/uvc_queue.h new file mode 100644 index 000000000..01ca9eab3 --- /dev/null +++ b/kernel/drivers/usb/gadget/function/uvc_queue.h @@ -0,0 +1,96 @@ +#ifndef _UVC_QUEUE_H_ +#define _UVC_QUEUE_H_ + +#ifdef __KERNEL__ + +#include <linux/kernel.h> +#include <linux/poll.h> +#include <linux/videodev2.h> +#include <media/videobuf2-core.h> + +/* Maximum frame size in bytes, for sanity checking. */ +#define UVC_MAX_FRAME_SIZE (16*1024*1024) +/* Maximum number of video buffers. */ +#define UVC_MAX_VIDEO_BUFFERS 32 + +/* ------------------------------------------------------------------------ + * Structures. + */ + +enum uvc_buffer_state { + UVC_BUF_STATE_IDLE = 0, + UVC_BUF_STATE_QUEUED = 1, + UVC_BUF_STATE_ACTIVE = 2, + UVC_BUF_STATE_DONE = 3, + UVC_BUF_STATE_ERROR = 4, +}; + +struct uvc_buffer { + struct vb2_buffer buf; + struct list_head queue; + + enum uvc_buffer_state state; + void *mem; + unsigned int length; + unsigned int bytesused; +}; + +#define UVC_QUEUE_DISCONNECTED (1 << 0) +#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1) +#define UVC_QUEUE_PAUSED (1 << 2) + +struct uvc_video_queue { + struct vb2_queue queue; + + unsigned int flags; + __u32 sequence; + + unsigned int buf_used; + + spinlock_t irqlock; /* Protects flags and irqqueue */ + struct list_head irqqueue; +}; + +static inline int uvc_queue_streaming(struct uvc_video_queue *queue) +{ + return vb2_is_streaming(&queue->queue); +} + +int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, + struct mutex *lock); + +void uvcg_free_buffers(struct uvc_video_queue *queue); + +int uvcg_alloc_buffers(struct uvc_video_queue *queue, + struct v4l2_requestbuffers *rb); + +int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); + +int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); + +int uvcg_dequeue_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *buf, int nonblocking); + +unsigned int uvcg_queue_poll(struct uvc_video_queue *queue, + struct file *file, poll_table *wait); + +int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); + +#ifndef CONFIG_MMU +unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue, + unsigned long pgoff); +#endif /* CONFIG_MMU */ + +void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect); + +int uvcg_queue_enable(struct uvc_video_queue *queue, int enable); + +struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue, + struct uvc_buffer *buf); + +struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue); + +#endif /* __KERNEL__ */ + +#endif /* _UVC_QUEUE_H_ */ + |