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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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
Indexes created Sat Sep 20 22:09:52 GMT 2025