1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
#-
# Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
# All rights reserved.
#
# This software was developed by SRI International and the University of
# Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
# ("CTSRD"), as part of the DARPA CRASH research programme.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
#include <machine/bus.h>
#ifdef FDT
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#endif
#include <dev/xdma/xdma.h>
INTERFACE xdma;
#
# Request a transfer.
#
METHOD int channel_request {
device_t dev;
struct xdma_channel *xchan;
struct xdma_request *req;
};
#
# Prepare xDMA channel for a scatter-gather transfer.
#
METHOD int channel_prep_sg {
device_t dev;
struct xdma_channel *xchan;
};
#
# Query DMA engine driver for the amount of free entries
# (descriptors) are available.
#
METHOD int channel_capacity {
device_t dev;
struct xdma_channel *xchan;
uint32_t *capacity;
};
#
# Submit sglist list to DMA engine driver.
#
METHOD int channel_submit_sg {
device_t dev;
struct xdma_channel *xchan;
struct xdma_sglist *sg;
uint32_t sg_n;
};
#
# Notify driver we have machine-dependend data.
#
METHOD int ofw_md_data {
device_t dev;
pcell_t *cells;
int ncells;
void **data;
};
#
# Allocate both virtual and harware channels.
#
METHOD int channel_alloc {
device_t dev;
struct xdma_channel *xchan;
};
#
# Free the real hardware channel.
#
METHOD int channel_free {
device_t dev;
struct xdma_channel *xchan;
};
#
# Begin, pause or terminate the channel operation.
#
METHOD int channel_control {
device_t dev;
struct xdma_channel *xchan;
int cmd;
};
|
