1 /* $NetBSD: tc_dma_3000_500.c,v 1.24 2021/07/18 05:12:27 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
34
35 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.24 2021/07/18 05:12:27 thorpej Exp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/device.h>
40 #include <sys/kernel.h>
41 #include <sys/kmem.h>
42
43 #define _ALPHA_BUS_DMA_PRIVATE
44 #include <sys/bus.h>
45
46 #include <dev/tc/tcvar.h>
47 #include <alpha/tc/tc_sgmap.h>
48 #include <alpha/tc/tc_dma_3000_500.h>
49
50 struct alpha_bus_dma_tag tc_dmat_sgmap = {
51 NULL, /* _cookie */
52 0, /* _wbase */
53 0, /* _wsize */
54 NULL, /* _next_window */
55 0, /* _boundary */
56 NULL, /* _sgmap */
57 PAGE_SIZE, /* _sgmap_minalign */
58 0, /* _pfthresh */
59 NULL, /* _get_tag */
60 tc_bus_dmamap_create_sgmap,
61 tc_bus_dmamap_destroy_sgmap,
62 tc_bus_dmamap_load_sgmap,
63 tc_bus_dmamap_load_mbuf_sgmap,
64 tc_bus_dmamap_load_uio_sgmap,
65 tc_bus_dmamap_load_raw_sgmap,
66 tc_bus_dmamap_unload_sgmap,
67 _bus_dmamap_sync,
68 _bus_dmamem_alloc,
69 _bus_dmamem_free,
70 _bus_dmamem_map,
71 _bus_dmamem_unmap,
72 _bus_dmamem_mmap,
73 };
74
75 struct tc_dma_slot_info {
76 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */
77 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */
78 };
79 struct tc_dma_slot_info *tc_dma_slot_info;
80
81 void
tc_dma_init_3000_500(int nslots)82 tc_dma_init_3000_500(int nslots)
83 {
84 extern struct alpha_bus_dma_tag tc_dmat_direct;
85 size_t sisize;
86 int i;
87
88 /* Allocate per-slot DMA info. */
89 sisize = nslots * sizeof(struct tc_dma_slot_info);
90 tc_dma_slot_info = kmem_zalloc(sisize, KM_SLEEP);
91
92 /* Default all slots to direct-mapped. */
93 for (i = 0; i < nslots; i++)
94 memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct,
95 sizeof(tc_dma_slot_info[i].tdsi_dmat));
96 }
97
98 /*
99 * Return the DMA tag for the given slot.
100 */
101 bus_dma_tag_t
tc_dma_get_tag_3000_500(int slot)102 tc_dma_get_tag_3000_500(int slot)
103 {
104
105 return (&tc_dma_slot_info[slot].tdsi_dmat);
106 }
107
108 /*
109 * Create a TURBOchannel SGMAP-mapped DMA map.
110 */
111 int
tc_bus_dmamap_create_sgmap(bus_dma_tag_t t,bus_size_t size,int nsegments,bus_size_t maxsegsz,bus_size_t boundary,int flags,bus_dmamap_t * dmamp)112 tc_bus_dmamap_create_sgmap(
113 bus_dma_tag_t t,
114 bus_size_t size,
115 int nsegments,
116 bus_size_t maxsegsz,
117 bus_size_t boundary,
118 int flags,
119 bus_dmamap_t *dmamp)
120 {
121 int error;
122
123 error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
124 boundary, flags, dmamp);
125 if (error)
126 return (error);
127
128 (void)*dmamp;
129
130 /* XXX BUS_DMA_ALLOCNOW */
131
132 return (error);
133 }
134
135 /*
136 * Destroy a TURBOchannel SGMAP-mapped DMA map.
137 */
138 void
tc_bus_dmamap_destroy_sgmap(bus_dma_tag_t t,bus_dmamap_t map)139 tc_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map)
140 {
141
142 KASSERT(map->dm_mapsize == 0);
143
144 _bus_dmamap_destroy(t, map);
145 }
146
147 /*
148 * Load a TURBOchannel SGMAP-mapped DMA map with a linear buffer.
149 */
150 int
tc_bus_dmamap_load_sgmap(bus_dma_tag_t t,bus_dmamap_t map,void * buf,bus_size_t buflen,struct proc * p,int flags)151 tc_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags)
152 {
153 struct tc_dma_slot_info *tdsi = t->_cookie;
154
155 return (tc_sgmap_load(t, map, buf, buflen, p, flags,
156 &tdsi->tdsi_sgmap));
157 }
158
159 /*
160 * Load a TURBOchannel SGMAP-mapped DMA map with an mbuf chain.
161 */
162 int
tc_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t,bus_dmamap_t map,struct mbuf * m,int flags)163 tc_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags)
164 {
165 struct tc_dma_slot_info *tdsi = t->_cookie;
166
167 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap));
168 }
169
170 /*
171 * Load a TURBOchannel SGMAP-mapped DMA map with a uio.
172 */
173 int
tc_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t,bus_dmamap_t map,struct uio * uio,int flags)174 tc_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags)
175 {
176 struct tc_dma_slot_info *tdsi = t->_cookie;
177
178 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap));
179 }
180
181 /*
182 * Load a TURBOchannel SGMAP-mapped DMA map with raw memory.
183 */
184 int
tc_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t,bus_dmamap_t map,bus_dma_segment_t * segs,int nsegs,bus_size_t size,int flags)185 tc_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
186 {
187 struct tc_dma_slot_info *tdsi = t->_cookie;
188
189 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags,
190 &tdsi->tdsi_sgmap));
191 }
192
193 /*
194 * Unload a TURBOchannel SGMAP-mapped DMA map.
195 */
196 void
tc_bus_dmamap_unload_sgmap(bus_dma_tag_t t,bus_dmamap_t map)197 tc_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map)
198 {
199 struct tc_dma_slot_info *tdsi = t->_cookie;
200
201 /*
202 * Invalidate any SGMAP page table entries used by this
203 * mapping.
204 */
205 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap);
206
207 /*
208 * Do the generic bits of the unload.
209 */
210 _bus_dmamap_unload_common(t, map);
211 }
212