Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linsysfs/linsysfs.c
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1 /*- 2 * Copyright (c) 2006 IronPort Systems 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/11.2/sys/compat/linsysfs/linsysfs.c 325015 2017-10-26 17:45:01Z tijl $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/queue.h> 33 #include <sys/blist.h> 34 #include <sys/conf.h> 35 #include <sys/exec.h> 36 #include <sys/filedesc.h> 37 #include <sys/kernel.h> 38 #include <sys/linker.h> 39 #include <sys/malloc.h> 40 #include <sys/mount.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 #include <sys/resourcevar.h> 44 #include <sys/sbuf.h> 45 #include <sys/smp.h> 46 #include <sys/socket.h> 47 #include <sys/vnode.h> 48 #include <sys/bus.h> 49 #include <sys/pciio.h> 50 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/pcireg.h> 53 54 #include <net/if.h> 55 56 #include <vm/vm.h> 57 #include <vm/pmap.h> 58 #include <vm/vm_map.h> 59 #include <vm/vm_param.h> 60 #include <vm/vm_object.h> 61 #include <vm/swap_pager.h> 62 63 #include <machine/bus.h> 64 65 #include <compat/linux/linux_ioctl.h> 66 #include <compat/linux/linux_mib.h> 67 #include <compat/linux/linux_util.h> 68 #include <fs/pseudofs/pseudofs.h> 69 70 struct scsi_host_queue { 71 TAILQ_ENTRY(scsi_host_queue) scsi_host_next; 72 char *path; 73 char *name; 74 }; 75 76 TAILQ_HEAD(,scsi_host_queue) scsi_host_q; 77 78 static int host_number = 0; 79 80 static int 81 atoi(const char *str) 82 { 83 return (int)strtol(str, (char **)NULL, 10); 84 } 85 86 /* 87 * Filler function for proc_name 88 */ 89 static int 90 linsysfs_scsiname(PFS_FILL_ARGS) 91 { 92 struct scsi_host_queue *scsi_host; 93 int index; 94 95 if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) { 96 index = atoi(&pn->pn_parent->pn_name[4]); 97 } else { 98 sbuf_printf(sb, "unknown\n"); 99 return (0); 100 } 101 TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) { 102 if (index-- == 0) { 103 sbuf_printf(sb, "%s\n", scsi_host->name); 104 return (0); 105 } 106 } 107 sbuf_printf(sb, "unknown\n"); 108 return (0); 109 } 110 111 /* 112 * Filler function for device sym-link 113 */ 114 static int 115 linsysfs_link_scsi_host(PFS_FILL_ARGS) 116 { 117 struct scsi_host_queue *scsi_host; 118 int index; 119 120 if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) { 121 index = atoi(&pn->pn_parent->pn_name[4]); 122 } else { 123 sbuf_printf(sb, "unknown\n"); 124 return (0); 125 } 126 TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) { 127 if (index-- == 0) { 128 sbuf_printf(sb, "../../../devices%s", scsi_host->path); 129 return(0); 130 } 131 } 132 sbuf_printf(sb, "unknown\n"); 133 return (0); 134 } 135 136 static int 137 linsysfs_fill_data(PFS_FILL_ARGS) 138 { 139 sbuf_printf(sb, "%s", (char *)pn->pn_data); 140 return (0); 141 } 142 143 static int 144 linsysfs_fill_vendor(PFS_FILL_ARGS) 145 { 146 sbuf_printf(sb, "0x%04x\n", pci_get_vendor((device_t)pn->pn_data)); 147 return (0); 148 } 149 150 static int 151 linsysfs_fill_device(PFS_FILL_ARGS) 152 { 153 sbuf_printf(sb, "0x%04x\n", pci_get_device((device_t)pn->pn_data)); 154 return (0); 155 } 156 157 static int 158 linsysfs_fill_subvendor(PFS_FILL_ARGS) 159 { 160 sbuf_printf(sb, "0x%04x\n", pci_get_subvendor((device_t)pn->pn_data)); 161 return (0); 162 } 163 164 static int 165 linsysfs_fill_subdevice(PFS_FILL_ARGS) 166 { 167 sbuf_printf(sb, "0x%04x\n", pci_get_subdevice((device_t)pn->pn_data)); 168 return (0); 169 } 170 171 static int 172 linsysfs_fill_revid(PFS_FILL_ARGS) 173 { 174 sbuf_printf(sb, "0x%x\n", pci_get_revid((device_t)pn->pn_data)); 175 return (0); 176 } 177 178 static int 179 linsysfs_fill_config(PFS_FILL_ARGS) 180 { 181 uint8_t config[48]; 182 device_t dev; 183 uint32_t reg; 184 185 dev = (device_t)pn->pn_data; 186 bzero(config, sizeof(config)); 187 reg = pci_get_vendor(dev); 188 config[0] = reg; 189 config[1] = reg >> 8; 190 reg = pci_get_device(dev); 191 config[2] = reg; 192 config[3] = reg >> 8; 193 reg = pci_get_revid(dev); 194 config[8] = reg; 195 reg = pci_get_subvendor(dev); 196 config[44] = reg; 197 config[45] = reg >> 8; 198 reg = pci_get_subdevice(dev); 199 config[46] = reg; 200 config[47] = reg >> 8; 201 sbuf_bcat(sb, config, sizeof(config)); 202 return (0); 203 } 204 205 /* 206 * Filler function for PCI uevent file 207 */ 208 static int 209 linsysfs_fill_uevent_pci(PFS_FILL_ARGS) 210 { 211 device_t dev; 212 213 dev = (device_t)pn->pn_data; 214 sbuf_printf(sb, "DRIVER=%s\nPCI_CLASS=%X\nPCI_ID=%04X:%04X\n" 215 "PCI_SUBSYS_ID=%04X:%04X\nPCI_SLOT_NAME=%04d:%02x:%02x.%x\n", 216 linux_driver_get_name_dev(dev), pci_get_class(dev), 217 pci_get_vendor(dev), pci_get_device(dev), pci_get_subvendor(dev), 218 pci_get_subdevice(dev), pci_get_domain(dev), pci_get_bus(dev), 219 pci_get_slot(dev), pci_get_function(dev)); 220 return (0); 221 } 222 223 /* 224 * Filler function for drm uevent file 225 */ 226 static int 227 linsysfs_fill_uevent_drm(PFS_FILL_ARGS) 228 { 229 device_t dev; 230 int unit; 231 232 dev = (device_t)pn->pn_data; 233 unit = device_get_unit(dev); 234 sbuf_printf(sb, 235 "MAJOR=226\nMINOR=%d\nDEVNAME=dri/card%d\nDEVTYPE=dri_minor\n", 236 unit, unit); 237 return (0); 238 } 239 240 static char * 241 get_full_pfs_path(struct pfs_node *cur) 242 { 243 char *temp, *path; 244 245 temp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 246 path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 247 path[0] = '\0'; 248 249 do { 250 snprintf(temp, MAXPATHLEN, "%s/%s", cur->pn_name, path); 251 strlcpy(path, temp, MAXPATHLEN); 252 cur = cur->pn_parent; 253 } while (cur->pn_parent != NULL); 254 255 path[strlen(path) - 1] = '\0'; /* remove extra slash */ 256 free(temp, M_TEMP); 257 return (path); 258 } 259 260 /* 261 * Filler function for symlink from drm char device to PCI device 262 */ 263 static int 264 linsysfs_fill_vgapci(PFS_FILL_ARGS) 265 { 266 char *path; 267 268 path = get_full_pfs_path((struct pfs_node*)pn->pn_data); 269 sbuf_printf(sb, "../../../%s", path); 270 free(path, M_TEMP); 271 return (0); 272 } 273 274 #define PCI_DEV "pci" 275 #define DRMN_DEV "drmn" 276 static int 277 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, 278 struct pfs_node *chardev, struct pfs_node *drm, char *path, char *prefix) 279 { 280 struct scsi_host_queue *scsi_host; 281 struct pfs_node *sub_dir, *cur_file; 282 int i, nchildren, error; 283 device_t *children, parent; 284 devclass_t devclass; 285 const char *name = NULL; 286 struct pci_devinfo *dinfo; 287 char *device, *host, *new_path, *devname; 288 289 new_path = path; 290 devname = malloc(16, M_TEMP, M_WAITOK); 291 292 parent = device_get_parent(dev); 293 if (parent) { 294 devclass = device_get_devclass(parent); 295 if (devclass != NULL) 296 name = devclass_get_name(devclass); 297 if (name && strcmp(name, PCI_DEV) == 0) { 298 dinfo = device_get_ivars(dev); 299 if (dinfo) { 300 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 301 new_path = malloc(MAXPATHLEN, M_TEMP, 302 M_WAITOK); 303 new_path[0] = '\000'; 304 strcpy(new_path, path); 305 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 306 device[0] = '\000'; 307 sprintf(device, "%s:%02x:%02x.%x", 308 prefix, 309 dinfo->cfg.bus, 310 dinfo->cfg.slot, 311 dinfo->cfg.func); 312 strcat(new_path, "/"); 313 strcat(new_path, device); 314 dir = pfs_create_dir(dir, device, 315 NULL, NULL, NULL, 0); 316 cur_file = pfs_create_file(dir, "vendor", 317 &linsysfs_fill_vendor, NULL, NULL, NULL, 318 PFS_RD); 319 cur_file->pn_data = (void*)dev; 320 cur_file = pfs_create_file(dir, "device", 321 &linsysfs_fill_device, NULL, NULL, NULL, 322 PFS_RD); 323 cur_file->pn_data = (void*)dev; 324 cur_file = pfs_create_file(dir, 325 "subsystem_vendor", 326 &linsysfs_fill_subvendor, NULL, NULL, NULL, 327 PFS_RD); 328 cur_file->pn_data = (void*)dev; 329 cur_file = pfs_create_file(dir, 330 "subsystem_device", 331 &linsysfs_fill_subdevice, NULL, NULL, NULL, 332 PFS_RD); 333 cur_file->pn_data = (void*)dev; 334 cur_file = pfs_create_file(dir, "revision", 335 &linsysfs_fill_revid, NULL, NULL, NULL, 336 PFS_RD); 337 cur_file->pn_data = (void*)dev; 338 cur_file = pfs_create_file(dir, "config", 339 &linsysfs_fill_config, NULL, NULL, NULL, 340 PFS_RD); 341 cur_file->pn_data = (void*)dev; 342 cur_file = pfs_create_file(dir, "uevent", 343 &linsysfs_fill_uevent_pci, NULL, NULL, 344 NULL, PFS_RD); 345 cur_file->pn_data = (void*)dev; 346 cur_file = pfs_create_link(dir, "subsystem", 347 &linsysfs_fill_data, NULL, NULL, NULL, 0); 348 /* libdrm just checks that the link ends in "/pci" */ 349 cur_file->pn_data = "/sys/bus/pci"; 350 351 if (dinfo->cfg.baseclass == PCIC_STORAGE) { 352 /* DJA only make this if needed */ 353 sprintf(host, "host%d", host_number++); 354 strcat(new_path, "/"); 355 strcat(new_path, host); 356 pfs_create_dir(dir, host, 357 NULL, NULL, NULL, 0); 358 scsi_host = malloc(sizeof( 359 struct scsi_host_queue), 360 M_DEVBUF, M_NOWAIT); 361 scsi_host->path = malloc( 362 strlen(new_path) + 1, 363 M_DEVBUF, M_NOWAIT); 364 scsi_host->path[0] = '\000'; 365 bcopy(new_path, scsi_host->path, 366 strlen(new_path) + 1); 367 scsi_host->name = "unknown"; 368 369 sub_dir = pfs_create_dir(scsi, host, 370 NULL, NULL, NULL, 0); 371 pfs_create_link(sub_dir, "device", 372 &linsysfs_link_scsi_host, 373 NULL, NULL, NULL, 0); 374 pfs_create_file(sub_dir, "proc_name", 375 &linsysfs_scsiname, 376 NULL, NULL, NULL, PFS_RD); 377 scsi_host->name 378 = linux_driver_get_name_dev(dev); 379 TAILQ_INSERT_TAIL(&scsi_host_q, 380 scsi_host, scsi_host_next); 381 } 382 free(device, M_TEMP); 383 free(host, M_TEMP); 384 } 385 } 386 387 devclass = device_get_devclass(dev); 388 if (devclass != NULL) 389 name = devclass_get_name(devclass); 390 else 391 name = NULL; 392 if (name != NULL && strcmp(name, DRMN_DEV) == 0 && 393 device_get_unit(dev) >= 0) { 394 dinfo = device_get_ivars(parent); 395 if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) { 396 sprintf(devname, "226:%d", 397 device_get_unit(dev)); 398 sub_dir = pfs_create_dir(chardev, 399 devname, NULL, NULL, NULL, 0); 400 cur_file = pfs_create_link(sub_dir, 401 "device", &linsysfs_fill_vgapci, NULL, 402 NULL, NULL, PFS_RD); 403 cur_file->pn_data = (void*)dir; 404 cur_file = pfs_create_file(sub_dir, 405 "uevent", &linsysfs_fill_uevent_drm, NULL, 406 NULL, NULL, PFS_RD); 407 cur_file->pn_data = (void*)dev; 408 sprintf(devname, "card%d", 409 device_get_unit(dev)); 410 sub_dir = pfs_create_dir(drm, 411 devname, NULL, NULL, NULL, 0); 412 cur_file = pfs_create_link(sub_dir, 413 "device", &linsysfs_fill_vgapci, NULL, 414 NULL, NULL, PFS_RD); 415 cur_file->pn_data = (void*)dir; 416 } 417 } 418 } 419 420 error = device_get_children(dev, &children, &nchildren); 421 if (error == 0) { 422 for (i = 0; i < nchildren; i++) 423 if (children[i]) 424 linsysfs_run_bus(children[i], dir, scsi, 425 chardev, drm, new_path, prefix); 426 free(children, M_TEMP); 427 } 428 if (new_path != path) 429 free(new_path, M_TEMP); 430 free(devname, M_TEMP); 431 432 return (1); 433 } 434 435 /* 436 * Filler function for sys/devices/system/cpu/online 437 */ 438 static int 439 linsysfs_cpuonline(PFS_FILL_ARGS) 440 { 441 442 sbuf_printf(sb, "%d-%d\n", CPU_FIRST(), mp_maxid); 443 return (0); 444 } 445 446 /* 447 * Filler function for sys/devices/system/cpu/cpuX/online 448 */ 449 static int 450 linsysfs_cpuxonline(PFS_FILL_ARGS) 451 { 452 453 sbuf_printf(sb, "1\n"); 454 return (0); 455 } 456 457 static void 458 linsysfs_listcpus(struct pfs_node *dir) 459 { 460 struct pfs_node *cpu; 461 char *name; 462 int i, count, len; 463 464 len = 1; 465 count = mp_maxcpus; 466 while (count > 10) { 467 count /= 10; 468 len++; 469 } 470 len += sizeof("cpu"); 471 name = malloc(len, M_TEMP, M_WAITOK); 472 473 for (i = 0; i < mp_ncpus; ++i) { 474 /* /sys/devices/system/cpu/cpuX */ 475 sprintf(name, "cpu%d", i); 476 cpu = pfs_create_dir(dir, name, NULL, NULL, NULL, 0); 477 478 pfs_create_file(cpu, "online", &linsysfs_cpuxonline, 479 NULL, NULL, NULL, PFS_RD); 480 } 481 free(name, M_TEMP); 482 } 483 484 /* 485 * Constructor 486 */ 487 static int 488 linsysfs_init(PFS_INIT_ARGS) 489 { 490 struct pfs_node *root; 491 struct pfs_node *class; 492 struct pfs_node *dir, *sys, *cpu; 493 struct pfs_node *drm; 494 struct pfs_node *pci; 495 struct pfs_node *scsi; 496 struct pfs_node *devdir, *chardev; 497 devclass_t devclass; 498 device_t dev; 499 500 TAILQ_INIT(&scsi_host_q); 501 502 root = pi->pi_root; 503 504 /* /sys/class/... */ 505 class = pfs_create_dir(root, "class", NULL, NULL, NULL, 0); 506 scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0); 507 drm = pfs_create_dir(class, "drm", NULL, NULL, NULL, 0); 508 509 /* /sys/dev/... */ 510 devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0); 511 chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0); 512 513 /* /sys/devices/... */ 514 dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0); 515 pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0); 516 517 devclass = devclass_find("root"); 518 if (devclass == NULL) { 519 return (0); 520 } 521 522 dev = devclass_get_device(devclass, 0); 523 linsysfs_run_bus(dev, pci, scsi, chardev, drm, "/pci0000:00", "0000"); 524 525 /* /sys/devices/system */ 526 sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0); 527 528 /* /sys/devices/system/cpu */ 529 cpu = pfs_create_dir(sys, "cpu", NULL, NULL, NULL, 0); 530 531 pfs_create_file(cpu, "online", &linsysfs_cpuonline, 532 NULL, NULL, NULL, PFS_RD); 533 534 linsysfs_listcpus(cpu); 535 536 return (0); 537 } 538 539 /* 540 * Destructor 541 */ 542 static int 543 linsysfs_uninit(PFS_INIT_ARGS) 544 { 545 struct scsi_host_queue *scsi_host, *scsi_host_tmp; 546 547 TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next, 548 scsi_host_tmp) { 549 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next); 550 free(scsi_host->path, M_TEMP); 551 free(scsi_host, M_TEMP); 552 } 553 554 return (0); 555 } 556 557 PSEUDOFS(linsysfs, 1, PR_ALLOW_MOUNT_LINSYSFS); 558 #if defined(__amd64__) 559 MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1); 560 #else 561 MODULE_DEPEND(linsysfs, linux, 1, 1, 1); 562 #endif
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