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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* $OpenBSD: tc_dma_3000_500.c,v 1.7 2017/10/29 08:50:43 mpi Exp $ */
/* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define _ALPHA_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <machine/alpha_cpu.h>
#include <machine/bus.h>
#include <dev/tc/tcvar.h>
#include <alpha/tc/tc_conf.h>
#include <alpha/tc/tc_3000_500.h>
#include <alpha/tc/tc_sgmap.h>
#include <alpha/tc/tc_dma_3000_500.h>
#define KV(x) (ALPHA_PHYS_TO_K0SEG(x))
struct alpha_sgmap tc_dma_sgmap; /* sgmap shared by all slots */
struct alpha_bus_dma_tag tc_dmat_sgmap = {
NULL, /* _cookie, not used */
0, /* _wbase */
0x1000000, /* _wsize (256MB: 32K entries) */
NULL, /* _next_window */
0, /* _boundary */
&tc_dma_sgmap, /* _sgmap */
NULL, /* _get_tag, not used */
alpha_sgmap_dmamap_create,
alpha_sgmap_dmamap_destroy,
tc_bus_dmamap_load_sgmap,
tc_bus_dmamap_load_mbuf_sgmap,
tc_bus_dmamap_load_uio_sgmap,
tc_bus_dmamap_load_raw_sgmap,
tc_bus_dmamap_unload_sgmap,
_bus_dmamap_sync,
_bus_dmamem_alloc,
_bus_dmamem_free,
_bus_dmamem_map,
_bus_dmamem_unmap,
_bus_dmamem_mmap,
};
void
tc_dma_init_3000_500(nslots)
int nslots;
{
int i;
struct alpha_bus_dma_tag *t;
for (i = 0; i < nslots; i++) {
/*
* Note that the use of sgmap on a slot is global, so we
* can not afford reverting to direct dma (by making
* _next_window point to the direct tag).
* On the other hand, the sgmap allows for 256MB of
* DMA transfers being programmed at the same time for all
* the slots, which should not be a liability.
*/
tc_3000_500_ioslot(i, IOSLOT_S, !0);
}
/*
* The TURBOchannel sgmap is shared by all slots.
* We need a valid bus_dma_tag_t to pass alpha_sgmap_init() in order
* to allocate the sgmap fill page, so pick the first.
*/
t = &tc_dmat_sgmap;
alpha_sgmap_init(t, t->_sgmap, "tc_sgmap",
t->_wbase, 0, t->_wsize,
SGMAP_PTE_SPACING * sizeof(SGMAP_PTE_TYPE),
(void *)TC_3000_500_SCMAP, 0);
}
/*
* Return the DMA tag for the given slot.
*/
bus_dma_tag_t
tc_dma_get_tag_3000_500(slot)
int slot;
{
return &tc_dmat_sgmap;
}
/*
* Load a TURBOchannel SGMAP-mapped DMA map with a linear buffer.
*/
int
tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
return (tc_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap));
}
/*
* Load a TURBOchannel SGMAP-mapped DMA map with an mbuf chain.
*/
int
tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m;
int flags;
{
return (tc_sgmap_load_mbuf(t, map, m, flags, t->_sgmap));
}
/*
* Load a TURBOchannel SGMAP-mapped DMA map with a uio.
*/
int
tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
return (tc_sgmap_load_uio(t, map, uio, flags, t->_sgmap));
}
/*
* Load a TURBOchannel SGMAP-mapped DMA map with raw memory.
*/
int
tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t size;
int flags;
{
return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap));
}
/*
* Unload a TURBOchannel SGMAP-mapped DMA map.
*/
void
tc_bus_dmamap_unload_sgmap(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
/*
* Invalidate any SGMAP page table entries used by this
* mapping.
*/
tc_sgmap_unload(t, map, t->_sgmap);
/*
* Do the generic bits of the unload.
*/
_bus_dmamap_unload(t, map);
}
|
