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/*
* Copyright (c) 2026 Abdelkader Boudih <freebsd@seuros.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef _DEV_VIDEO_VIDEO_INTERNAL_H_
#define _DEV_VIDEO_VIDEO_INTERNAL_H_
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/sx.h>
#include <sys/queue.h>
#include <sys/selinfo.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <dev/video/video.h>
MALLOC_DECLARE(M_VIDEO);
#define VIDEO_MAX_BUFFERS 8
#define VIDEO_READ_BUFFERS 3
enum video_buf_state {
VB_IDLE,
VB_QUEUED,
VB_ACTIVE,
VB_DONE,
VB_ERROR,
};
struct video_buf {
STAILQ_ENTRY(video_buf) entry;
struct video_buf_pool *pool;
struct video_device *vd;
uint32_t index;
enum video_buf_state state;
void *buf;
size_t length;
size_t bytesused;
uint32_t sequence;
struct timeval timestamp;
uint32_t flags;
};
STAILQ_HEAD(video_buf_list, video_buf);
/*
* All buffers must stay carved out of one OBJT_PHYS vm_object, mapped into
* the kernel map and handed to userspace mmap as that same object. Giving
* each buffer its own object breaks the mmap path.
*/
struct video_buf_pool {
vm_object_t obj;
vm_offset_t kva;
u_int nbufs;
size_t buf_size;
size_t map_size;
struct video_buf bufs[VIDEO_MAX_BUFFERS];
};
struct video_file {
struct video_device *vd;
bool is_owner;
bool reading; /* read(2) in progress */
size_t read_offset;
struct video_buf *read_buf;
};
enum video_mode {
VMODE_NONE,
VMODE_READ,
VMODE_MMAP,
};
/* Lock order: cfg_sx -> mtx. */
struct video_device {
device_t dev;
struct cdev *cdev;
int unit;
struct sx cfg_sx;
struct mtx mtx;
bool dying;
struct video_file *owner;
enum video_mode mode;
bool streaming;
bool stopping;
struct video_format format;
struct video_buf_pool *pool;
struct video_buf_list queued;
struct video_buf_list done;
u_int readers; /* copies in flight from pool */
struct selinfo sel;
};
#endif /* _DEV_VIDEO_VIDEO_INTERNAL_H_ */
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