projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a0adaf3 HV |
1 | /* |
| 2 | buffer queues. | |
| 3 | Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> | |
| 4 | Copyright (C) 2004 Chris Kennedy <c@groovy.org> | |
| 5 | Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> | |
| 6 | ||
| 7 | This program is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation; either version 2 of the License, or | |
| 10 | (at your option) any later version. | |
| 11 | ||
| 12 | This program is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with this program; if not, write to the Free Software | |
| 19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 20 | */ | |
| 21 | ||
| 612570f2 HV |
22 | #ifndef IVTV_QUEUE_H |
| 23 | #define IVTV_QUEUE_H | |
| 24 | ||
| 1a0adaf3 | 25 | #define IVTV_DMA_UNMAPPED ((u32) -1) |
| d526afe0 | 26 | #define SLICED_VBI_PIO 0 |
| 1a0adaf3 HV |
27 | |
| 28 | /* ivtv_buffer utility functions */ | |
| dc02d50a HV |
29 | |
| 30 | static inline int ivtv_might_use_pio(struct ivtv_stream *s) | |
| 31 | { | |
| 32 | return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI); | |
| 33 | } | |
| 34 | ||
| 35 | static inline int ivtv_use_pio(struct ivtv_stream *s) | |
| 36 | { | |
| 37 | struct ivtv *itv = s->itv; | |
| 38 | ||
| 39 | return s->dma == PCI_DMA_NONE || | |
| 40 | (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set); | |
| 41 | } | |
| 42 | ||
| 43 | static inline int ivtv_might_use_dma(struct ivtv_stream *s) | |
| 44 | { | |
| 45 | return s->dma != PCI_DMA_NONE; | |
| 46 | } | |
| 47 | ||
| 48 | static inline int ivtv_use_dma(struct ivtv_stream *s) | |
| 49 | { | |
| 50 | return !ivtv_use_pio(s); | |
| 51 | } | |
| 52 | ||
| 1a0adaf3 HV |
53 | static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf) |
| 54 | { | |
| dc02d50a | 55 | if (ivtv_use_dma(s)) |
| 8ac05ae3 | 56 | pci_dma_sync_single_for_cpu(s->itv->pdev, buf->dma_handle, |
| 1a0adaf3 HV |
57 | s->buf_size + 256, s->dma); |
| 58 | } | |
| 59 | ||
| 60 | static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf) | |
| 61 | { | |
| dc02d50a | 62 | if (ivtv_use_dma(s)) |
| 8ac05ae3 | 63 | pci_dma_sync_single_for_device(s->itv->pdev, buf->dma_handle, |
| 1a0adaf3 HV |
64 | s->buf_size + 256, s->dma); |
| 65 | } | |
| 66 | ||
| 67 | int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes); | |
| 68 | void ivtv_buf_swap(struct ivtv_buffer *buf); | |
| 69 | ||
| 70 | /* ivtv_queue utility functions */ | |
| 71 | void ivtv_queue_init(struct ivtv_queue *q); | |
| 72 | void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q); | |
| 73 | struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q); | |
| 74 | int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal, | |
| 75 | struct ivtv_queue *to, int needed_bytes); | |
| 76 | void ivtv_flush_queues(struct ivtv_stream *s); | |
| 77 | ||
| 78 | /* ivtv_stream utility functions */ | |
| 79 | int ivtv_stream_alloc(struct ivtv_stream *s); | |
| 80 | void ivtv_stream_free(struct ivtv_stream *s); | |
| 81 | ||
| 82 | static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s) | |
| 83 | { | |
| dc02d50a | 84 | if (ivtv_use_dma(s)) |
| 8ac05ae3 | 85 | pci_dma_sync_single_for_cpu(s->itv->pdev, s->sg_handle, |
| 37093b1e | 86 | sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE); |
| 1a0adaf3 HV |
87 | } |
| 88 | ||
| 89 | static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s) | |
| 90 | { | |
| dc02d50a | 91 | if (ivtv_use_dma(s)) |
| 8ac05ae3 | 92 | pci_dma_sync_single_for_device(s->itv->pdev, s->sg_handle, |
| 37093b1e | 93 | sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE); |
| 1a0adaf3 | 94 | } |
| 612570f2 HV |
95 | |
| 96 | #endif |