MAGIC_CHECK(vb->magic,MAGIC_BUFFER);
add_wait_queue(&vb->done, &wait);
- while (vb->state == STATE_ACTIVE || vb->state == STATE_QUEUED) {
+ while (vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) {
if (non_blocking) {
retval = -EAGAIN;
break;
}
set_current_state(intr ? TASK_INTERRUPTIBLE
: TASK_UNINTERRUPTIBLE);
- if (vb->state == STATE_ACTIVE || vb->state == STATE_QUEUED)
+ if (vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)
schedule();
set_current_state(TASK_RUNNING);
if (intr && signal_pending(current)) {
INIT_LIST_HEAD(&q->stream);
}
+/* Locking: Only usage in bttv unsafe find way to remove */
int videobuf_queue_is_busy(struct videobuf_queue *q)
{
int i;
dprintk(1,"busy: buffer #%d mapped\n",i);
return 1;
}
- if (q->bufs[i]->state == STATE_QUEUED) {
+ if (q->bufs[i]->state == VIDEOBUF_QUEUED) {
dprintk(1,"busy: buffer #%d queued\n",i);
return 1;
}
- if (q->bufs[i]->state == STATE_ACTIVE) {
+ if (q->bufs[i]->state == VIDEOBUF_ACTIVE) {
dprintk(1,"busy: buffer #%d avtive\n",i);
return 1;
}
return 0;
}
+/* Locking: Caller holds q->lock */
void videobuf_queue_cancel(struct videobuf_queue *q)
{
unsigned long flags=0;
for (i = 0; i < VIDEO_MAX_FRAME; i++) {
if (NULL == q->bufs[i])
continue;
- if (q->bufs[i]->state == STATE_QUEUED) {
+ if (q->bufs[i]->state == VIDEOBUF_QUEUED) {
list_del(&q->bufs[i]->queue);
- q->bufs[i]->state = STATE_ERROR;
+ q->bufs[i]->state = VIDEOBUF_ERROR;
}
}
if (q->irqlock)
/* --------------------------------------------------------------------- */
+/* Locking: Caller holds q->lock */
enum v4l2_field videobuf_next_field(struct videobuf_queue *q)
{
enum v4l2_field field = q->field;
return field;
}
+/* Locking: Caller holds q->lock */
static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
struct videobuf_buffer *vb, enum v4l2_buf_type type)
{
b->flags |= V4L2_BUF_FLAG_MAPPED;
switch (vb->state) {
- case STATE_PREPARED:
- case STATE_QUEUED:
- case STATE_ACTIVE:
+ case VIDEOBUF_PREPARED:
+ case VIDEOBUF_QUEUED:
+ case VIDEOBUF_ACTIVE:
b->flags |= V4L2_BUF_FLAG_QUEUED;
break;
- case STATE_DONE:
- case STATE_ERROR:
+ case VIDEOBUF_DONE:
+ case VIDEOBUF_ERROR:
b->flags |= V4L2_BUF_FLAG_DONE;
break;
- case STATE_NEEDS_INIT:
- case STATE_IDLE:
+ case VIDEOBUF_NEEDS_INIT:
+ case VIDEOBUF_IDLE:
/* nothing */
break;
}
b->sequence = vb->field_count >> 1;
}
+/* Locking: Caller holds q->lock */
+static int __videobuf_mmap_free(struct videobuf_queue *q)
+{
+ int i;
+ int rc;
+
+ if (!q)
+ return 0;
+
+ MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);
+
+ rc = CALL(q,mmap_free,q);
+ if (rc<0)
+ return rc;
+
+ for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+ if (NULL == q->bufs[i])
+ continue;
+ q->ops->buf_release(q,q->bufs[i]);
+ kfree(q->bufs[i]);
+ q->bufs[i] = NULL;
+ }
+
+ return rc;
+}
+
+int videobuf_mmap_free(struct videobuf_queue *q)
+{
+ int ret;
+ mutex_lock(&q->lock);
+ ret = __videobuf_mmap_free(q);
+ mutex_unlock(&q->lock);
+ return ret;
+}
+
+/* Locking: Caller holds q->lock */
+static int __videobuf_mmap_setup(struct videobuf_queue *q,
+ unsigned int bcount, unsigned int bsize,
+ enum v4l2_memory memory)
+{
+ unsigned int i;
+ int err;
+
+ MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);
+
+ err = __videobuf_mmap_free(q);
+ if (0 != err)
+ return err;
+
+ /* Allocate and initialize buffers */
+ for (i = 0; i < bcount; i++) {
+ q->bufs[i] = videobuf_alloc(q);
+
+ if (q->bufs[i] == NULL)
+ break;
+
+ q->bufs[i]->i = i;
+ q->bufs[i]->input = UNSET;
+ q->bufs[i]->memory = memory;
+ q->bufs[i]->bsize = bsize;
+ switch (memory) {
+ case V4L2_MEMORY_MMAP:
+ q->bufs[i]->boff = bsize * i;
+ break;
+ case V4L2_MEMORY_USERPTR:
+ case V4L2_MEMORY_OVERLAY:
+ /* nothing */
+ break;
+ }
+ }
+
+ if (!i)
+ return -ENOMEM;
+
+ dprintk(1,"mmap setup: %d buffers, %d bytes each\n",
+ i, bsize);
+
+ return i;
+}
+
+int videobuf_mmap_setup(struct videobuf_queue *q,
+ unsigned int bcount, unsigned int bsize,
+ enum v4l2_memory memory)
+{
+ int ret;
+ mutex_lock(&q->lock);
+ ret = __videobuf_mmap_setup(q, bcount, bsize, memory);
+ mutex_unlock(&q->lock);
+ return ret;
+}
+
int videobuf_reqbufs(struct videobuf_queue *q,
struct v4l2_requestbuffers *req)
{
unsigned int size,count;
int retval;
- if (req->type != q->type) {
- dprintk(1,"reqbufs: queue type invalid\n");
- return -EINVAL;
- }
if (req->count < 1) {
dprintk(1,"reqbufs: count invalid (%d)\n",req->count);
return -EINVAL;
}
+
if (req->memory != V4L2_MEMORY_MMAP &&
req->memory != V4L2_MEMORY_USERPTR &&
req->memory != V4L2_MEMORY_OVERLAY) {
}
mutex_lock(&q->lock);
+ if (req->type != q->type) {
+ dprintk(1,"reqbufs: queue type invalid\n");
+ retval = -EINVAL;
+ goto done;
+ }
+
if (q->streaming) {
dprintk(1,"reqbufs: streaming already exists\n");
retval = -EBUSY;
dprintk(1,"reqbufs: bufs=%d, size=0x%x [%d pages total]\n",
count, size, (count*size)>>PAGE_SHIFT);
- retval = videobuf_mmap_setup(q,count,size,req->memory);
+ retval = __videobuf_mmap_setup(q,count,size,req->memory);
if (retval < 0) {
dprintk(1,"reqbufs: mmap setup returned %d\n",retval);
goto done;
int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)
{
+ int ret = -EINVAL;
+
+ mutex_lock(&q->lock);
if (unlikely(b->type != q->type)) {
dprintk(1,"querybuf: Wrong type.\n");
- return -EINVAL;
+ goto done;
}
if (unlikely(b->index < 0 || b->index >= VIDEO_MAX_FRAME)) {
dprintk(1,"querybuf: index out of range.\n");
- return -EINVAL;
+ goto done;
}
if (unlikely(NULL == q->bufs[b->index])) {
dprintk(1,"querybuf: buffer is null.\n");
- return -EINVAL;
+ goto done;
}
+
videobuf_status(q,b,q->bufs[b->index],q->type);
- return 0;
+
+ ret = 0;
+done:
+ mutex_unlock(&q->lock);
+ return ret;
}
int videobuf_qbuf(struct videobuf_queue *q,
dprintk(1,"qbuf: memory type is wrong.\n");
goto done;
}
- if (buf->state != STATE_NEEDS_INIT && buf->state != STATE_IDLE) {
+ if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) {
dprintk(1,"qbuf: buffer is already queued or active.\n");
goto done;
}
dprintk(1,"qbuf: buffer length is not enough\n");
goto done;
}
- if (STATE_NEEDS_INIT != buf->state && buf->baddr != b->m.userptr)
+ if (VIDEOBUF_NEEDS_INIT != buf->state && buf->baddr != b->m.userptr)
q->ops->buf_release(q,buf);
buf->baddr = b->m.userptr;
break;
goto done;
}
switch (buf->state) {
- case STATE_ERROR:
+ case VIDEOBUF_ERROR:
dprintk(1,"dqbuf: state is error\n");
retval = -EIO;
CALL(q,sync,q, buf);
- buf->state = STATE_IDLE;
+ buf->state = VIDEOBUF_IDLE;
break;
- case STATE_DONE:
+ case VIDEOBUF_DONE:
dprintk(1,"dqbuf: state is done\n");
CALL(q,sync,q, buf);
- buf->state = STATE_IDLE;
+ buf->state = VIDEOBUF_IDLE;
break;
default:
dprintk(1,"dqbuf: state invalid\n");
if (q->irqlock)
spin_lock_irqsave(q->irqlock,flags);
list_for_each_entry(buf, &q->stream, stream)
- if (buf->state == STATE_PREPARED)
+ if (buf->state == VIDEOBUF_PREPARED)
q->ops->buf_queue(q,buf);
if (q->irqlock)
spin_unlock_irqrestore(q->irqlock,flags);
return retval;
}
-int videobuf_streamoff(struct videobuf_queue *q)
+/* Locking: Caller holds q->lock */
+static int __videobuf_streamoff(struct videobuf_queue *q)
{
- int retval = -EINVAL;
-
- mutex_lock(&q->lock);
if (!q->streaming)
- goto done;
+ return -EINVAL;
+
videobuf_queue_cancel(q);
q->streaming = 0;
- retval = 0;
- done:
+ return 0;
+}
+
+int videobuf_streamoff(struct videobuf_queue *q)
+{
+ int retval;
+
+ mutex_lock(&q->lock);
+ retval = __videobuf_streamoff(q);
mutex_unlock(&q->lock);
+
return retval;
}
+/* Locking: Caller holds q->lock */
static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q,
char __user *data,
size_t count, loff_t *ppos)
retval = videobuf_waiton(q->read_buf,0,0);
if (0 == retval) {
CALL(q,sync,q,q->read_buf);
- if (STATE_ERROR == q->read_buf->state)
+ if (VIDEOBUF_ERROR == q->read_buf->state)
retval = -EIO;
else
retval = q->read_buf->size;
CALL(q,sync,q,q->read_buf);
- if (STATE_ERROR == q->read_buf->state) {
+ if (VIDEOBUF_ERROR == q->read_buf->state) {
/* catch I/O errors */
q->ops->buf_release(q,q->read_buf);
kfree(q->read_buf);
return retval;
}
-int videobuf_read_start(struct videobuf_queue *q)
+/* Locking: Caller holds q->lock */
+int __videobuf_read_start(struct videobuf_queue *q)
{
enum v4l2_field field;
unsigned long flags=0;
count = VIDEO_MAX_FRAME;
size = PAGE_ALIGN(size);
- err = videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);
+ err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);
if (err < 0)
return err;
return 0;
}
-void videobuf_read_stop(struct videobuf_queue *q)
+static void __videobuf_read_stop(struct videobuf_queue *q)
{
int i;
+
videobuf_queue_cancel(q);
- videobuf_mmap_free(q);
+ __videobuf_mmap_free(q);
INIT_LIST_HEAD(&q->stream);
for (i = 0; i < VIDEO_MAX_FRAME; i++) {
if (NULL == q->bufs[i])
}
q->read_buf = NULL;
q->reading = 0;
+
}
+int videobuf_read_start(struct videobuf_queue *q)
+{
+ int rc;
+
+ mutex_lock(&q->lock);
+ rc = __videobuf_read_start(q);
+ mutex_unlock(&q->lock);
+
+ return rc;
+}
+
+void videobuf_read_stop(struct videobuf_queue *q)
+{
+ mutex_lock(&q->lock);
+ __videobuf_read_stop(q);
+ mutex_unlock(&q->lock);
+}
+
+void videobuf_stop(struct videobuf_queue *q)
+{
+ mutex_lock(&q->lock);
+
+ if (q->streaming)
+ __videobuf_streamoff(q);
+
+ if (q->reading)
+ __videobuf_read_stop(q);
+
+ mutex_unlock(&q->lock);
+}
+
+
ssize_t videobuf_read_stream(struct videobuf_queue *q,
char __user *data, size_t count, loff_t *ppos,
int vbihack, int nonblocking)
if (q->streaming)
goto done;
if (!q->reading) {
- retval = videobuf_read_start(q);
+ retval = __videobuf_read_start(q);
if (retval < 0)
goto done;
}
break;
}
- if (q->read_buf->state == STATE_DONE) {
+ if (q->read_buf->state == VIDEOBUF_DONE) {
rc = CALL (q,copy_stream, q, data + retval, count,
retval, vbihack, nonblocking);
if (rc < 0) {
struct videobuf_buffer, stream);
} else {
if (!q->reading)
- videobuf_read_start(q);
+ __videobuf_read_start(q);
if (!q->reading) {
rc = POLLERR;
} else if (NULL == q->read_buf) {
if (0 == rc) {
poll_wait(file, &buf->done, wait);
- if (buf->state == STATE_DONE ||
- buf->state == STATE_ERROR)
+ if (buf->state == VIDEOBUF_DONE ||
+ buf->state == VIDEOBUF_ERROR)
rc = POLLIN|POLLRDNORM;
}
mutex_unlock(&q->lock);
return rc;
}
-int videobuf_mmap_setup(struct videobuf_queue *q,
- unsigned int bcount, unsigned int bsize,
- enum v4l2_memory memory)
-{
- unsigned int i;
- int err;
-
- MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);
-
- err = videobuf_mmap_free(q);
- if (0 != err)
- return err;
-
- /* Allocate and initialize buffers */
- for (i = 0; i < bcount; i++) {
- q->bufs[i] = videobuf_alloc(q);
-
- if (q->bufs[i] == NULL)
- break;
-
- q->bufs[i]->i = i;
- q->bufs[i]->input = UNSET;
- q->bufs[i]->memory = memory;
- q->bufs[i]->bsize = bsize;
- switch (memory) {
- case V4L2_MEMORY_MMAP:
- q->bufs[i]->boff = bsize * i;
- break;
- case V4L2_MEMORY_USERPTR:
- case V4L2_MEMORY_OVERLAY:
- /* nothing */
- break;
- }
- }
-
- if (!i)
- return -ENOMEM;
-
- dprintk(1,"mmap setup: %d buffers, %d bytes each\n",
- i, bsize);
-
- return i;
-}
-
-int videobuf_mmap_free(struct videobuf_queue *q)
-{
- int i;
- int rc;
-
- if (!q)
- return 0;
-
- MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);
-
- rc = CALL(q,mmap_free,q);
- if (rc<0)
- return rc;
-
- for (i = 0; i < VIDEO_MAX_FRAME; i++) {
- if (NULL == q->bufs[i])
- continue;
- q->ops->buf_release(q,q->bufs[i]);
- kfree(q->bufs[i]);
- q->bufs[i] = NULL;
- }
-
- return rc;
-}
-
int videobuf_mmap_mapper(struct videobuf_queue *q,
struct vm_area_struct *vma)
{
EXPORT_SYMBOL_GPL(videobuf_read_start);
EXPORT_SYMBOL_GPL(videobuf_read_stop);
+EXPORT_SYMBOL_GPL(videobuf_stop);
EXPORT_SYMBOL_GPL(videobuf_read_stream);
EXPORT_SYMBOL_GPL(videobuf_read_one);
EXPORT_SYMBOL_GPL(videobuf_poll_stream);
projects / linux-2.6-omap-h63xx.git / blobdiff