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path: root/drivers/media/video/cx18/cx18-queue.c
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Diffstat (limited to 'drivers/media/video/cx18/cx18-queue.c')
-rw-r--r--drivers/media/video/cx18/cx18-queue.c235
1 files changed, 0 insertions, 235 deletions
diff --git a/drivers/media/video/cx18/cx18-queue.c b/drivers/media/video/cx18/cx18-queue.c
deleted file mode 100644
index 8d9441e88c4..00000000000
--- a/drivers/media/video/cx18/cx18-queue.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * cx18 buffer queues
- *
- * Derived from ivtv-queue.c
- *
- * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
- * Copyright (C) 2008 Andy Walls <awalls@radix.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- * 02111-1307 USA
- */
-
-#include "cx18-driver.h"
-#include "cx18-streams.h"
-#include "cx18-queue.h"
-#include "cx18-scb.h"
-
-void cx18_buf_swap(struct cx18_buffer *buf)
-{
- int i;
-
- for (i = 0; i < buf->bytesused; i += 4)
- swab32s((u32 *)(buf->buf + i));
-}
-
-void cx18_queue_init(struct cx18_queue *q)
-{
- INIT_LIST_HEAD(&q->list);
- atomic_set(&q->buffers, 0);
- q->bytesused = 0;
-}
-
-struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
- struct cx18_queue *q, int to_front)
-{
- /* clear the buffer if it is not to be enqueued to the full queue */
- if (q != &s->q_full) {
- buf->bytesused = 0;
- buf->readpos = 0;
- buf->b_flags = 0;
- buf->skipped = 0;
- }
-
- mutex_lock(&s->qlock);
-
- /* q_busy is restricted to a max buffer count imposed by firmware */
- if (q == &s->q_busy &&
- atomic_read(&q->buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
- q = &s->q_free;
-
- if (to_front)
- list_add(&buf->list, &q->list); /* LIFO */
- else
- list_add_tail(&buf->list, &q->list); /* FIFO */
- q->bytesused += buf->bytesused - buf->readpos;
- atomic_inc(&q->buffers);
-
- mutex_unlock(&s->qlock);
- return q;
-}
-
-struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q)
-{
- struct cx18_buffer *buf = NULL;
-
- mutex_lock(&s->qlock);
- if (!list_empty(&q->list)) {
- buf = list_first_entry(&q->list, struct cx18_buffer, list);
- list_del_init(&buf->list);
- q->bytesused -= buf->bytesused - buf->readpos;
- buf->skipped = 0;
- atomic_dec(&q->buffers);
- }
- mutex_unlock(&s->qlock);
- return buf;
-}
-
-struct cx18_buffer *cx18_queue_get_buf(struct cx18_stream *s, u32 id,
- u32 bytesused)
-{
- struct cx18 *cx = s->cx;
- struct cx18_buffer *buf;
- struct cx18_buffer *tmp;
- struct cx18_buffer *ret = NULL;
-
- mutex_lock(&s->qlock);
- list_for_each_entry_safe(buf, tmp, &s->q_busy.list, list) {
- if (buf->id != id) {
- buf->skipped++;
- if (buf->skipped >= atomic_read(&s->q_busy.buffers)-1) {
- /* buffer must have fallen out of rotation */
- CX18_WARN("Skipped %s, buffer %d, %d "
- "times - it must have dropped out of "
- "rotation\n", s->name, buf->id,
- buf->skipped);
- /* move it to q_free */
- list_move_tail(&buf->list, &s->q_free.list);
- buf->bytesused = buf->readpos = buf->b_flags =
- buf->skipped = 0;
- atomic_dec(&s->q_busy.buffers);
- atomic_inc(&s->q_free.buffers);
- }
- continue;
- }
-
- buf->bytesused = bytesused;
- /* Sync the buffer before we release the qlock */
- cx18_buf_sync_for_cpu(s, buf);
- if (s->type == CX18_ENC_STREAM_TYPE_TS) {
- /*
- * TS doesn't use q_full. As we pull the buffer off of
- * the queue here, the caller will have to put it back.
- */
- list_del_init(&buf->list);
- } else {
- /* Move buffer from q_busy to q_full */
- list_move_tail(&buf->list, &s->q_full.list);
- set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags);
- s->q_full.bytesused += buf->bytesused;
- atomic_inc(&s->q_full.buffers);
- }
- atomic_dec(&s->q_busy.buffers);
-
- ret = buf;
- break;
- }
- mutex_unlock(&s->qlock);
- return ret;
-}
-
-/* Move all buffers of a queue to q_free, while flushing the buffers */
-static void cx18_queue_flush(struct cx18_stream *s, struct cx18_queue *q)
-{
- struct cx18_buffer *buf;
-
- if (q == &s->q_free)
- return;
-
- mutex_lock(&s->qlock);
- while (!list_empty(&q->list)) {
- buf = list_first_entry(&q->list, struct cx18_buffer, list);
- list_move_tail(&buf->list, &s->q_free.list);
- buf->bytesused = buf->readpos = buf->b_flags = buf->skipped = 0;
- atomic_inc(&s->q_free.buffers);
- }
- cx18_queue_init(q);
- mutex_unlock(&s->qlock);
-}
-
-void cx18_flush_queues(struct cx18_stream *s)
-{
- cx18_queue_flush(s, &s->q_busy);
- cx18_queue_flush(s, &s->q_full);
-}
-
-int cx18_stream_alloc(struct cx18_stream *s)
-{
- struct cx18 *cx = s->cx;
- int i;
-
- if (s->buffers == 0)
- return 0;
-
- CX18_DEBUG_INFO("Allocate %s stream: %d x %d buffers (%dkB total)\n",
- s->name, s->buffers, s->buf_size,
- s->buffers * s->buf_size / 1024);
-
- if (((char __iomem *)&cx->scb->cpu_mdl[cx->mdl_offset + s->buffers] -
- (char __iomem *)cx->scb) > SCB_RESERVED_SIZE) {
- unsigned bufsz = (((char __iomem *)cx->scb) + SCB_RESERVED_SIZE -
- ((char __iomem *)cx->scb->cpu_mdl));
-
- CX18_ERR("Too many buffers, cannot fit in SCB area\n");
- CX18_ERR("Max buffers = %zd\n",
- bufsz / sizeof(struct cx18_mdl));
- return -ENOMEM;
- }
-
- s->mdl_offset = cx->mdl_offset;
-
- /* allocate stream buffers. Initially all buffers are in q_free. */
- for (i = 0; i < s->buffers; i++) {
- struct cx18_buffer *buf = kzalloc(sizeof(struct cx18_buffer),
- GFP_KERNEL|__GFP_NOWARN);
-
- if (buf == NULL)
- break;
- buf->buf = kmalloc(s->buf_size, GFP_KERNEL|__GFP_NOWARN);
- if (buf->buf == NULL) {
- kfree(buf);
- break;
- }
- buf->id = cx->buffer_id++;
- INIT_LIST_HEAD(&buf->list);
- buf->dma_handle = pci_map_single(s->cx->dev,
- buf->buf, s->buf_size, s->dma);
- cx18_buf_sync_for_cpu(s, buf);
- cx18_enqueue(s, buf, &s->q_free);
- }
- if (i == s->buffers) {
- cx->mdl_offset += s->buffers;
- return 0;
- }
- CX18_ERR("Couldn't allocate buffers for %s stream\n", s->name);
- cx18_stream_free(s);
- return -ENOMEM;
-}
-
-void cx18_stream_free(struct cx18_stream *s)
-{
- struct cx18_buffer *buf;
-
- /* move all buffers to q_free */
- cx18_flush_queues(s);
-
- /* empty q_free */
- while ((buf = cx18_dequeue(s, &s->q_free))) {
- pci_unmap_single(s->cx->dev, buf->dma_handle,
- s->buf_size, s->dma);
- kfree(buf->buf);
- kfree(buf);
- }
-}
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