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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
cdda479f LP |
2 | #ifndef _UVC_QUEUE_H_ |
3 | #define _UVC_QUEUE_H_ | |
4 | ||
5 | #ifdef __KERNEL__ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/poll.h> | |
9 | #include <linux/videodev2.h> | |
c139990e | 10 | #include <media/videobuf2-v4l2.h> |
cdda479f LP |
11 | |
12 | /* Maximum frame size in bytes, for sanity checking. */ | |
13 | #define UVC_MAX_FRAME_SIZE (16*1024*1024) | |
14 | /* Maximum number of video buffers. */ | |
15 | #define UVC_MAX_VIDEO_BUFFERS 32 | |
16 | ||
17 | /* ------------------------------------------------------------------------ | |
18 | * Structures. | |
19 | */ | |
20 | ||
21 | enum uvc_buffer_state { | |
22 | UVC_BUF_STATE_IDLE = 0, | |
23 | UVC_BUF_STATE_QUEUED = 1, | |
24 | UVC_BUF_STATE_ACTIVE = 2, | |
25 | UVC_BUF_STATE_DONE = 3, | |
26 | UVC_BUF_STATE_ERROR = 4, | |
27 | }; | |
28 | ||
29 | struct uvc_buffer { | |
2d700715 | 30 | struct vb2_v4l2_buffer buf; |
cdda479f | 31 | struct list_head queue; |
d6925225 | 32 | |
cdda479f | 33 | enum uvc_buffer_state state; |
d6925225 BS |
34 | void *mem; |
35 | unsigned int length; | |
36 | unsigned int bytesused; | |
cdda479f LP |
37 | }; |
38 | ||
d6925225 BS |
39 | #define UVC_QUEUE_DISCONNECTED (1 << 0) |
40 | #define UVC_QUEUE_DROP_INCOMPLETE (1 << 1) | |
41 | #define UVC_QUEUE_PAUSED (1 << 2) | |
cdda479f LP |
42 | |
43 | struct uvc_video_queue { | |
d6925225 | 44 | struct vb2_queue queue; |
cdda479f | 45 | |
cdda479f LP |
46 | unsigned int flags; |
47 | __u32 sequence; | |
48 | ||
cdda479f | 49 | unsigned int buf_used; |
cdda479f | 50 | |
d6925225 | 51 | spinlock_t irqlock; /* Protects flags and irqqueue */ |
cdda479f LP |
52 | struct list_head irqqueue; |
53 | }; | |
54 | ||
cdda479f LP |
55 | static inline int uvc_queue_streaming(struct uvc_video_queue *queue) |
56 | { | |
d6925225 | 57 | return vb2_is_streaming(&queue->queue); |
cdda479f | 58 | } |
cdda479f | 59 | |
d8e96c4b HV |
60 | int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, |
61 | struct mutex *lock); | |
3a83c16e AP |
62 | |
63 | void uvcg_free_buffers(struct uvc_video_queue *queue); | |
64 | ||
65 | int uvcg_alloc_buffers(struct uvc_video_queue *queue, | |
66 | struct v4l2_requestbuffers *rb); | |
67 | ||
68 | int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); | |
69 | ||
70 | int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); | |
71 | ||
72 | int uvcg_dequeue_buffer(struct uvc_video_queue *queue, | |
73 | struct v4l2_buffer *buf, int nonblocking); | |
74 | ||
75 | unsigned int uvcg_queue_poll(struct uvc_video_queue *queue, | |
76 | struct file *file, poll_table *wait); | |
77 | ||
78 | int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); | |
79 | ||
80 | #ifndef CONFIG_MMU | |
81 | unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue, | |
82 | unsigned long pgoff); | |
83 | #endif /* CONFIG_MMU */ | |
84 | ||
85 | void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect); | |
86 | ||
87 | int uvcg_queue_enable(struct uvc_video_queue *queue, int enable); | |
88 | ||
89 | struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue, | |
90 | struct uvc_buffer *buf); | |
91 | ||
92 | struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue); | |
93 | ||
cdda479f LP |
94 | #endif /* __KERNEL__ */ |
95 | ||
96 | #endif /* _UVC_QUEUE_H_ */ | |
97 |