diff options
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-queue.h')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-queue.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/media/video/ivtv/ivtv-queue.h b/drivers/media/video/ivtv/ivtv-queue.h new file mode 100644 index 00000000000..903edd4b438 --- /dev/null +++ b/drivers/media/video/ivtv/ivtv-queue.h @@ -0,0 +1,64 @@ +/* + buffer queues. + Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> + Copyright (C) 2004 Chris Kennedy <c@groovy.org> + Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> + + 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 + */ + +#define IVTV_DMA_UNMAPPED ((u32) -1) + +/* ivtv_buffer utility functions */ +static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf) +{ + if (s->dma != PCI_DMA_NONE) + pci_dma_sync_single_for_cpu(s->itv->dev, buf->dma_handle, + s->buf_size + 256, s->dma); +} + +static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf) +{ + if (s->dma != PCI_DMA_NONE) + pci_dma_sync_single_for_device(s->itv->dev, buf->dma_handle, + s->buf_size + 256, s->dma); +} + +int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes); +void ivtv_buf_swap(struct ivtv_buffer *buf); + +/* ivtv_queue utility functions */ +void ivtv_queue_init(struct ivtv_queue *q); +void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q); +struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q); +int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal, + struct ivtv_queue *to, int needed_bytes); +void ivtv_flush_queues(struct ivtv_stream *s); + +/* ivtv_stream utility functions */ +int ivtv_stream_alloc(struct ivtv_stream *s); +void ivtv_stream_free(struct ivtv_stream *s); + +static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s) +{ + pci_dma_sync_single_for_cpu(s->itv->dev, s->SG_handle, + sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE); +} + +static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s) +{ + pci_dma_sync_single_for_device(s->itv->dev, s->SG_handle, + sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE); +} |