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