1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Omnitek Scatter-Gather DMA Controller
4 *
5 * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
6 * All rights reserved.
7 */
8
9#ifndef COBALT_OMNITEK_H
10#define COBALT_OMNITEK_H
11
12#include <linux/scatterlist.h>
13#include "cobalt-driver.h"
14
15struct sg_dma_descriptor {
16 u32 pci_l;
17 u32 pci_h;
18
19 u32 local;
20 u32 reserved0;
21
22 u32 next_l;
23 u32 next_h;
24
25 u32 bytes;
26 u32 reserved1;
27};
28
29int omni_sg_dma_init(struct cobalt *cobalt);
30void omni_sg_dma_abort_channel(struct cobalt_stream *s);
31void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc);
32bool is_dma_done(struct cobalt_stream *s);
33
34int descriptor_list_create(struct cobalt *cobalt,
35 struct scatterlist *scatter_list, bool to_pci, unsigned sglen,
36 unsigned size, unsigned width, unsigned stride,
37 struct sg_dma_desc_info *desc);
38
39void descriptor_list_chain(struct sg_dma_desc_info *this,
40 struct sg_dma_desc_info *next);
41void descriptor_list_loopback(struct sg_dma_desc_info *desc);
42void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc);
43
44void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes);
45void descriptor_list_free(struct sg_dma_desc_info *desc);
46
47void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc);
48void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc);
49
50#endif
51

source code of linux/drivers/media/pci/cobalt/cobalt-omnitek.h