int uvc_request_buffers(struct uvc_video_queue *queue,
struct v4l2_requestbuffers *rb)
{
int ret;
mutex_lock(&queue->mutex);
ret = vb2_reqbufs(&queue->queue, rb);
mutex_unlock(&queue->mutex);
return ret ? ret : rb->count;
}
static int fimc_lite_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct fimc_lite *fimc = video_drvdata(file);
int ret;
reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
ret = vb2_reqbufs(&fimc->vb_queue, reqbufs);
if (!ret)
fimc->reqbufs_count = reqbufs->count;
return ret;
}
/**
* __vb2_cleanup_fileio() - free resourced used by file io emulator
* @q: videobuf2 queue
*/
static int __vb2_cleanup_fileio(struct vb2_queue *q)
{
struct vb2_fileio_data *fileio = q->fileio;
if (fileio) {
vb2_core_streamoff(q, q->type);
q->fileio = NULL;
fileio->req.count = 0;
vb2_reqbufs(q, &fileio->req);
kfree(fileio);
dprintk(3, "file io emulator closed\n");
}
return 0;
}
static int fimc_cap_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct fimc_ctx *ctx = priv;
struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
int ret;
ret = vb2_reqbufs(&cap->vbq, reqbufs);
if (!ret)
cap->reqbufs_count = reqbufs->count;
return ret;
}
int fimc_is_video_reqbufs(struct file *file,
struct fimc_is_video_ctx *vctx,
struct v4l2_requestbuffers *request)
{
int ret = 0;
struct fimc_is_framemgr *framemgr;
struct fimc_is_queue *queue;
BUG_ON(!vctx);
BUG_ON(!request);
queue = GET_VCTX_QUEUE(vctx, request);
if (test_bit(FIMC_IS_QUEUE_STREAM_ON, &queue->state)) {
err("video is stream on, not applied");
ret = -EINVAL;
goto p_err;
}
ret = vb2_reqbufs(queue->vbq, request);
if (ret) {
err("vb2_reqbufs is fail(%d)", ret);
goto p_err;
}
framemgr = &queue->framemgr;
queue->buf_maxcount = request->count;
if (queue->buf_maxcount == 0) {
queue->buf_refcount = 0;
clear_bit(FIMC_IS_QUEUE_BUFFER_READY, &queue->state);
clear_bit(FIMC_IS_QUEUE_BUFFER_PREPARED, &queue->state);
fimc_is_frame_close(framemgr);
} else {
if (queue->buf_maxcount < queue->buf_rdycount) {
err("buffer count is not invalid(%d < %d)",
queue->buf_maxcount, queue->buf_rdycount);
ret = -EINVAL;
goto p_err;
}
if (!queue->buf_rdycount)
set_bit(FIMC_IS_QUEUE_BUFFER_READY, &queue->state);
fimc_is_frame_open(framemgr, queue->buf_maxcount);
}
p_err:
return ret;
}
int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_requestbuffers *reqbufs)
{
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type);
ret = vb2_reqbufs(vq, reqbufs);
/* If count == 0, then the owner has released all buffers and he
is no longer owner of the queue. Otherwise we have an owner. */
if (ret == 0)
vq->owner = reqbufs->count ? file->private_data : NULL;
return ret;
}
static int at91sam9x5_video_vidioc_reqbufs(struct file *filp,
void *fh, struct v4l2_requestbuffers *b)
{
struct video_device *vdev = filp->private_data;
struct at91sam9x5_video_priv *priv = video_get_drvdata(vdev);
struct vb2_queue *q = &priv->queue;
if (b->type != q->type) {
dev_err(&priv->pdev->dev, "invalid buffer type (%d != %d)\n",
b->type, q->type);
return -EINVAL;
}
return vb2_reqbufs(q, b);
}
static int camera_v4l2_reqbufs(struct file *filep, void *fh,
struct v4l2_requestbuffers *req)
{
int ret;
struct msm_session *session;
struct camera_v4l2_private *sp = fh_to_private(fh);
struct msm_video_device *pvdev = video_drvdata(filep);
unsigned int session_id = pvdev->vdev->num;
session = msm_session_find(session_id);
if (WARN_ON(!session))
return -EIO;
mutex_lock(&session->lock);
ret = vb2_reqbufs(&sp->vb2_q, req);
mutex_unlock(&session->lock);
return ret;
}
static int gsc_capture_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct gsc_dev *gsc = video_drvdata(file);
struct gsc_capture_device *cap = &gsc->cap;
struct gsc_frame *frame;
int ret;
frame = ctx_get_frame(cap->ctx, reqbufs->type);
ret = vb2_reqbufs(&cap->vbq, reqbufs);
if (!ret)
cap->reqbufs_cnt = reqbufs->count;
return ret;
}
static int fimc_is_isp_video_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *buf)
{
struct fimc_is_dev *is_dev = video_drvdata(file);
struct fimc_is_video_dev *video = file->private_data;
int ret;
ret = vb2_reqbufs(&video->vbq, buf);
if (!ret)
is_dev->video[FIMC_IS_VIDEO_NUM_BAYER].num_buf = buf->count;
if (buf->count == 0)
is_dev->video[FIMC_IS_VIDEO_NUM_BAYER].buf_ref_cnt = 0;
printk(KERN_INFO "%s(num_buf : %d)\n", __func__,
is_dev->video[FIMC_IS_VIDEO_NUM_BAYER].num_buf);
return ret;
}
/**
* __vb2_cleanup_fileio() - free resourced used by file io emulator
* @q: videobuf2 queue
*/
static int __vb2_cleanup_fileio(struct vb2_queue *q)
{
struct vb2_fileio_data *fileio = q->fileio;
if (fileio) {
/*
* Hack fileio context to enable direct calls to vb2 ioctl
* interface.
*/
q->fileio = NULL;
vb2_streamoff(q, q->type);
fileio->req.count = 0;
vb2_reqbufs(q, &fileio->req);
kfree(fileio);
dprintk(3, "file io emulator closed\n");
}
return 0;
}
static int wfdioc_reqbufs(struct file *filp, void *fh,
struct v4l2_requestbuffers *b)
{
int rc = 0;
struct wfd_inst *inst = filp->private_data;
unsigned long flags;
int i;
if (b->type != V4L2_CAP_VIDEO_CAPTURE ||
b->memory != V4L2_MEMORY_USERPTR) {
WFD_MSG_ERR("Only V4L2_CAP_VIDEO_CAPTURE and "
"V4L2_CAP_VIDEO_CAPTURE are supported\n");
return -EINVAL;
}
if (b->count < MIN_BUF_COUNT)
b->count = MIN_BUF_COUNT;
spin_lock_irqsave(&inst->inst_lock, flags);
if (inst->minfo) {
for (i = 0; i < inst->buf_count; ++i)
kfree(inst->minfo[i]);
}
kfree(inst->minfo);
inst->buf_count = b->count;
inst->minfo = kzalloc(sizeof(struct mem_info *) * inst->buf_count,
GFP_KERNEL);
for (i = 0; i < inst->buf_count; ++i)
inst->minfo[i] = kzalloc(sizeof(struct mem_info), GFP_KERNEL);
spin_unlock_irqrestore(&inst->inst_lock, flags);
rc = vb2_reqbufs(&inst->vid_bufq, b);
if (rc) {
WFD_MSG_ERR("Failed in videobuf_reqbufs, rc = %d\n", rc);
spin_lock_irqsave(&inst->inst_lock, flags);
if (inst->minfo) {
for (i = 0; i < inst->buf_count; ++i)
kfree(inst->minfo[i]);
}
kfree(inst->minfo);
inst->minfo = NULL;
spin_unlock_irqrestore(&inst->inst_lock, flags);
}
return rc;
}
static int
xvip_dma_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
{
struct v4l2_fh *vfh = file->private_data;
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
int ret;
mutex_lock(&dma->lock);
if (dma->queue.owner && dma->queue.owner != vfh) {
ret = -EBUSY;
goto done;
}
ret = vb2_reqbufs(&dma->queue, rb);
if (ret < 0)
goto done;
dma->queue.owner = vfh;
done:
mutex_unlock(&dma->lock);
return ret ? ret : rb->count;
}
/**
* __vb2_init_fileio() - initialize file io emulator
* @q: videobuf2 queue
* @read: mode selector (1 means read, 0 means write)
*/
static int __vb2_init_fileio(struct vb2_queue *q, int read)
{
struct vb2_fileio_data *fileio;
int i, ret;
unsigned int count = 0;
/*
* Sanity check
*/
if ((read && !(q->io_modes & VB2_READ)) ||
(!read && !(q->io_modes & VB2_WRITE)))
BUG();
/*
* Check if device supports mapping buffers to kernel virtual space.
*/
if (!q->mem_ops->vaddr)
return -EBUSY;
/*
* Check if streaming api has not been already activated.
*/
if (q->streaming || q->num_buffers > 0)
return -EBUSY;
/*
* Start with count 1, driver can increase it in queue_setup()
*/
count = 1;
dprintk(3, "setting up file io: mode %s, count %d, flags %08x\n",
(read) ? "read" : "write", count, q->io_flags);
fileio = kzalloc(sizeof(struct vb2_fileio_data), GFP_KERNEL);
if (fileio == NULL)
return -ENOMEM;
fileio->flags = q->io_flags;
/*
* Request buffers and use MMAP type to force driver
* to allocate buffers by itself.
*/
fileio->req.count = count;
fileio->req.memory = V4L2_MEMORY_MMAP;
fileio->req.type = q->type;
ret = vb2_reqbufs(q, &fileio->req);
if (ret)
goto err_kfree;
/*
* Check if plane_count is correct
* (multiplane buffers are not supported).
*/
if (q->bufs[0]->num_planes != 1) {
fileio->req.count = 0;
ret = -EBUSY;
goto err_reqbufs;
}
/*
* Get kernel address of each buffer.
*/
for (i = 0; i < q->num_buffers; i++) {
fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0);
if (fileio->bufs[i].vaddr == NULL)
goto err_reqbufs;
fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0);
}
/*
* Read mode requires pre queuing of all buffers.
*/
if (read) {
/*
* Queue all buffers.
*/
for (i = 0; i < q->num_buffers; i++) {
struct v4l2_buffer *b = &fileio->b;
memset(b, 0, sizeof(*b));
b->type = q->type;
b->memory = q->memory;
b->index = i;
ret = vb2_qbuf(q, b);
if (ret)
goto err_reqbufs;
fileio->bufs[i].queued = 1;
}
/*
* Start streaming.
*/
ret = vb2_streamon(q, q->type);
if (ret)
goto err_reqbufs;
}
q->fileio = fileio;
return ret;
err_reqbufs:
vb2_reqbufs(q, &fileio->req);
err_kfree:
kfree(fileio);
return ret;
}
int fimc_is_video_reqbufs(struct file *file,
struct fimc_is_video_ctx *vctx,
struct v4l2_requestbuffers *request)
{
int ret = 0;
struct fimc_is_queue *queue;
struct fimc_is_framemgr *framemgr;
BUG_ON(!vctx);
BUG_ON(!request);
if (!(vctx->state & (BIT(FIMC_IS_VIDEO_S_FORMAT) | BIT(FIMC_IS_VIDEO_STOP) | BIT(FIMC_IS_VIDEO_S_BUFS)))) {
err("[V%02d] invalid reqbufs is requested(%lX)", vctx->video->id, vctx->state);
return -EINVAL;
}
queue = GET_QUEUE(vctx);
if (test_bit(FIMC_IS_QUEUE_STREAM_ON, &queue->state)) {
err("video is stream on, not applied");
ret = -EINVAL;
goto p_err;
}
ret = CALL_QOPS(queue, request_bufs, GET_DEVICE(vctx), request->count);
if (ret) {
err("request_bufs is fail(%d)", ret);
goto p_err;
}
ret = vb2_reqbufs(queue->vbq, request);
if (ret) {
err("vb2_reqbufs is fail(%d)", ret);
goto p_err;
}
framemgr = &queue->framemgr;
queue->buf_maxcount = request->count;
if (queue->buf_maxcount == 0) {
queue->buf_req = 0;
queue->buf_pre = 0;
queue->buf_que = 0;
queue->buf_com = 0;
queue->buf_dqe = 0;
queue->buf_refcount = 0;
clear_bit(FIMC_IS_QUEUE_BUFFER_READY, &queue->state);
clear_bit(FIMC_IS_QUEUE_BUFFER_PREPARED, &queue->state);
fimc_is_frame_close(framemgr);
} else {
if (queue->buf_maxcount < queue->buf_rdycount) {
err("buffer count is not invalid(%d < %d)",
queue->buf_maxcount, queue->buf_rdycount);
ret = -EINVAL;
goto p_err;
}
ret = fimc_is_frame_open(framemgr, queue->buf_maxcount);
if (ret) {
err("[V%02d] fimc_is_frame_open is fail(%d)", vctx->video->id, ret);
goto p_err;
}
}
vctx->state = BIT(FIMC_IS_VIDEO_S_BUFS);
p_err:
return ret;
}
static int __vb2_init_fileio(struct vb2_queue *q, int read)
{
struct vb2_fileio_data *fileio;
int i, ret;
unsigned int count = 0;
if ((read && !(q->io_modes & VB2_READ)) ||
(!read && !(q->io_modes & VB2_WRITE)))
BUG();
if (!q->mem_ops->vaddr)
return -EBUSY;
if (q->streaming || q->num_buffers > 0)
return -EBUSY;
count = 1;
dprintk(3, "setting up file io: mode %s, count %d, flags %08x\n",
(read) ? "read" : "write", count, q->io_flags);
fileio = kzalloc(sizeof(struct vb2_fileio_data), GFP_KERNEL);
if (fileio == NULL)
return -ENOMEM;
fileio->flags = q->io_flags;
fileio->req.count = count;
fileio->req.memory = V4L2_MEMORY_MMAP;
fileio->req.type = q->type;
ret = vb2_reqbufs(q, &fileio->req);
if (ret)
goto err_kfree;
if (q->bufs[0]->num_planes != 1) {
fileio->req.count = 0;
ret = -EBUSY;
goto err_reqbufs;
}
for (i = 0; i < q->num_buffers; i++) {
fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0);
if (fileio->bufs[i].vaddr == NULL)
goto err_reqbufs;
fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0);
}
if (read) {
for (i = 0; i < q->num_buffers; i++) {
struct v4l2_buffer *b = &fileio->b;
memset(b, 0, sizeof(*b));
b->type = q->type;
b->memory = q->memory;
b->index = i;
ret = vb2_qbuf(q, b);
if (ret)
goto err_reqbufs;
fileio->bufs[i].queued = 1;
}
ret = vb2_streamon(q, q->type);
if (ret)
goto err_reqbufs;
}
q->fileio = fileio;
return ret;
err_reqbufs:
vb2_reqbufs(q, &fileio->req);
err_kfree:
kfree(fileio);
return ret;
}
/* Reqeust buffers */
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct s5p_mfc_dev *dev = video_drvdata(file);
struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
int ret = 0;
if (reqbufs->memory != V4L2_MEMORY_MMAP) {
mfc_err("Only V4L2_MEMORY_MAP is supported\n");
return -EINVAL;
}
if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
/* Can only request buffers after an instance has been opened.*/
if (ctx->state == MFCINST_INIT) {
ctx->src_bufs_cnt = 0;
if (reqbufs->count == 0) {
mfc_debug(2, "Freeing buffers\n");
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_src, reqbufs);
s5p_mfc_clock_off();
return ret;
}
/* Decoding */
if (ctx->output_state != QUEUE_FREE) {
mfc_err("Bufs have already been requested\n");
return -EINVAL;
}
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_src, reqbufs);
s5p_mfc_clock_off();
if (ret) {
mfc_err("vb2_reqbufs on output failed\n");
return ret;
}
mfc_debug(2, "vb2_reqbufs: %d\n", ret);
ctx->output_state = QUEUE_BUFS_REQUESTED;
}
} else if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
ctx->dst_bufs_cnt = 0;
if (reqbufs->count == 0) {
mfc_debug(2, "Freeing buffers\n");
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
s5p_mfc_clock_off();
return ret;
}
if (ctx->capture_state != QUEUE_FREE) {
mfc_err("Bufs have already been requested\n");
return -EINVAL;
}
ctx->capture_state = QUEUE_BUFS_REQUESTED;
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
s5p_mfc_clock_off();
if (ret) {
mfc_err("vb2_reqbufs on capture failed\n");
return ret;
}
if (reqbufs->count < ctx->dpb_count) {
mfc_err("Not enough buffers allocated\n");
reqbufs->count = 0;
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
s5p_mfc_clock_off();
return -ENOMEM;
}
ctx->total_dpb_count = reqbufs->count;
ret = s5p_mfc_hw_call(dev->mfc_ops, alloc_codec_buffers, ctx);
if (ret) {
mfc_err("Failed to allocate decoding buffers\n");
reqbufs->count = 0;
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
s5p_mfc_clock_off();
return -ENOMEM;
}
if (ctx->dst_bufs_cnt == ctx->total_dpb_count) {
ctx->capture_state = QUEUE_BUFS_MMAPED;
} else {
mfc_err("Not all buffers passed to buf_init\n");
reqbufs->count = 0;
s5p_mfc_clock_on();
ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers,
ctx);
s5p_mfc_clock_off();
return -ENOMEM;
}
if (s5p_mfc_ctx_ready(ctx))
set_work_bit_irqsave(ctx);
s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
s5p_mfc_wait_for_done_ctx(ctx,
S5P_MFC_R2H_CMD_INIT_BUFFERS_RET, 0);
}
return ret;
}
static int myvivi_vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *p)
{//上面我们定义的队列为:myvivi_vb_vidqueue
return vb2_reqbufs(&myvivi_vb_vidqueue, p);
}