1 /* $NetBSD: rumpdev_bus_space.c,v 1.10 2019/01/27 02:08:48 pgoyette Exp $ */
2
3 /*-
4 * Copyright (c) 2013 Antti Kantee. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: rumpdev_bus_space.c,v 1.10 2019/01/27 02:08:48 pgoyette Exp $");
30
31 #include <sys/atomic.h>
32
33 #include <sys/param.h>
34
35 #include <dev/pci/pcivar.h>
36
37 #include "pci_user.h"
38
39 #if defined(RUMPCOMP_USERFEATURE_PCI_IOSPACE) \
40 && (defined(__i386__) || defined(__x86_64__))
41 #define IOSPACE_SUPPORTED
42 #endif
43
44 int
bus_space_map(bus_space_tag_t bst,bus_addr_t address,bus_size_t size,int flags,bus_space_handle_t * handlep)45 bus_space_map(bus_space_tag_t bst, bus_addr_t address, bus_size_t size,
46 int flags, bus_space_handle_t *handlep)
47 {
48 int rv;
49
50 /*
51 * I/O space we just "let it bli" in case someone wants to
52 * map it (e.g. on Xen)
53 *
54 * Memory space needs to be mapped into our guest, so we
55 * make a hypercall to request it.
56 */
57 if (bst == 0) {
58 #ifdef IOSPACE_SUPPORTED
59 *handlep = address;
60 rv = 0;
61 #else
62 rv = ENOTSUP;
63 #endif
64 } else {
65 *handlep = (bus_space_handle_t)rumpcomp_pci_map(address, size);
66 rv = *handlep ? 0 : EINVAL;
67 }
68
69 return rv;
70 }
71
72 uint8_t
bus_space_read_1(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset)73 bus_space_read_1(bus_space_tag_t bst, bus_space_handle_t bsh,
74 bus_size_t offset)
75 {
76 uint8_t rv;
77
78 if (bst == 0) {
79 #ifdef IOSPACE_SUPPORTED
80 unsigned short addr = bsh + offset;
81 __asm__ __volatile__("inb %1, %0" : "=a"(rv) : "d"(addr));
82 #else
83 panic("IO space not supported");
84 #endif
85 } else {
86 rv = *(volatile uint8_t *)(bsh + offset);
87 }
88
89 return rv;
90 }
91
92 uint16_t
bus_space_read_2(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset)93 bus_space_read_2(bus_space_tag_t bst, bus_space_handle_t bsh,
94 bus_size_t offset)
95 {
96 uint16_t rv;
97
98 if (bst == 0) {
99 #ifdef IOSPACE_SUPPORTED
100 unsigned short addr = bsh + offset;
101 __asm__ __volatile__("in %1, %0" : "=a"(rv) : "d"(addr));
102 #else
103 panic("IO space not supported");
104 #endif
105 } else {
106 rv = *(volatile uint16_t *)(bsh + offset);
107 }
108
109 return rv;
110 }
111
112 uint32_t
bus_space_read_4(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset)113 bus_space_read_4(bus_space_tag_t bst, bus_space_handle_t bsh,
114 bus_size_t offset)
115 {
116 uint32_t rv;
117
118 if (bst == 0) {
119 #ifdef IOSPACE_SUPPORTED
120 unsigned short addr = bsh + offset;
121 __asm__ __volatile__("inl %1, %0" : "=a"(rv) : "d"(addr));
122 #else
123 panic("IO space not supported");
124 #endif
125 } else {
126 rv = *(volatile uint32_t *)(bsh + offset);
127 }
128
129 return rv;
130 }
131
132 void
bus_space_read_multi_1(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint8_t * datap,bus_size_t count)133 bus_space_read_multi_1(bus_space_tag_t bst, bus_space_handle_t bsh,
134 bus_size_t offset, uint8_t *datap, bus_size_t count)
135 {
136
137 while (count--) {
138 *datap++ = bus_space_read_1(bst, bsh, offset);
139 bus_space_barrier(bst, bsh, offset, 1, BUS_SPACE_BARRIER_READ);
140 }
141 }
142
143 void
bus_space_read_multi_2(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint16_t * datap,bus_size_t count)144 bus_space_read_multi_2(bus_space_tag_t bst, bus_space_handle_t bsh,
145 bus_size_t offset, uint16_t *datap, bus_size_t count)
146 {
147
148 while (count--) {
149 *datap++ = bus_space_read_2(bst, bsh, offset);
150 bus_space_barrier(bst, bsh, offset, 2, BUS_SPACE_BARRIER_READ);
151 }
152 }
153
154 void
bus_space_read_multi_4(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint32_t * datap,bus_size_t count)155 bus_space_read_multi_4(bus_space_tag_t bst, bus_space_handle_t bsh,
156 bus_size_t offset, uint32_t *datap, bus_size_t count)
157 {
158
159 while (count--) {
160 *datap++ = bus_space_read_4(bst, bsh, offset);
161 bus_space_barrier(bst, bsh, offset, 4, BUS_SPACE_BARRIER_READ);
162 }
163 }
164
165 void
bus_space_write_1(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint8_t v)166 bus_space_write_1(bus_space_tag_t bst, bus_space_handle_t bsh,
167 bus_size_t offset, uint8_t v)
168 {
169
170 if (bst == 0) {
171 #ifdef IOSPACE_SUPPORTED
172 unsigned short addr = bsh + offset;
173 __asm__ __volatile__("outb %0, %1" :: "a"(v), "d"(addr));
174 #else
175 panic("IO space not supported");
176 #endif
177 } else {
178 *(volatile uint8_t *)(bsh + offset) = v;
179 }
180 }
181
182 void
bus_space_write_2(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint16_t v)183 bus_space_write_2(bus_space_tag_t bst, bus_space_handle_t bsh,
184 bus_size_t offset, uint16_t v)
185 {
186
187 if (bst == 0) {
188 #ifdef IOSPACE_SUPPORTED
189 unsigned short addr = bsh + offset;
190 __asm__ __volatile__("out %0, %1" :: "a"(v), "d"(addr));
191 #else
192 panic("IO space not supported");
193 #endif
194 } else {
195 *(volatile uint16_t *)(bsh + offset) = v;
196 }
197 }
198
199 void
bus_space_write_4(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,uint32_t v)200 bus_space_write_4(bus_space_tag_t bst, bus_space_handle_t bsh,
201 bus_size_t offset, uint32_t v)
202 {
203
204 if (bst == 0) {
205 #ifdef IOSPACE_SUPPORTED
206 unsigned short addr = bsh + offset;
207 __asm__ __volatile__("outl %0, %1" :: "a"(v), "d"(addr));
208 #else
209 panic("IO space not supported");
210 #endif
211 } else {
212 *(volatile uint32_t *)(bsh + offset) = v;
213 }
214 }
215
216 void
bus_space_write_multi_1(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,const uint8_t * datap,bus_size_t count)217 bus_space_write_multi_1(bus_space_tag_t bst, bus_space_handle_t bsh,
218 bus_size_t offset, const uint8_t *datap, bus_size_t count)
219 {
220
221 while (count--) {
222 const uint8_t value = *datap++;
223
224 bus_space_write_1(bst, bsh, offset, value);
225 bus_space_barrier(bst, bsh, offset, 1, BUS_SPACE_BARRIER_WRITE);
226 }
227 }
228
229 void
bus_space_write_multi_2(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,const uint16_t * datap,bus_size_t count)230 bus_space_write_multi_2(bus_space_tag_t bst, bus_space_handle_t bsh,
231 bus_size_t offset, const uint16_t *datap, bus_size_t count)
232 {
233
234 while (count--) {
235 const uint16_t value = *datap++;
236
237 bus_space_write_2(bst, bsh, offset, value);
238 bus_space_barrier(bst, bsh, offset, 2, BUS_SPACE_BARRIER_WRITE);
239 }
240 }
241
242 void
bus_space_write_multi_4(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,const uint32_t * datap,bus_size_t count)243 bus_space_write_multi_4(bus_space_tag_t bst, bus_space_handle_t bsh,
244 bus_size_t offset, const uint32_t *datap, bus_size_t count)
245 {
246
247 while (count--) {
248 const uint32_t value = *datap++;
249
250 bus_space_write_4(bst, bsh, offset, value);
251 bus_space_barrier(bst, bsh, offset, 4, BUS_SPACE_BARRIER_WRITE);
252 }
253 }
254
255 paddr_t
bus_space_mmap(bus_space_tag_t bst,bus_addr_t addr,off_t off,int prot,int flags)256 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off,
257 int prot, int flags)
258 {
259
260 panic("%s: unimplemented", __func__);
261 }
262
263 int
bus_space_subregion(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nhandlep)264 bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh,
265 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep)
266 {
267
268 *nhandlep = bsh + offset;
269 return 0;
270 }
271
272 void
bus_space_unmap(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t size)273 bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh,
274 bus_size_t size)
275 {
276
277 if (bst == 0)
278 return;
279
280 panic("%s: unimplemented", __func__);
281 }
282
283 void
bus_space_barrier(bus_space_tag_t bst,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)284 bus_space_barrier(bus_space_tag_t bst, bus_space_handle_t bsh,
285 bus_size_t offset, bus_size_t len, int flags)
286 {
287
288 /* weelll ... */
289 membar_sync();
290 }
291