1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 IronPort Systems 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/ctype.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/mount.h> 38 #include <sys/sbuf.h> 39 #include <sys/smp.h> 40 #include <sys/bus.h> 41 #include <sys/pciio.h> 42 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 46 #include <compat/linux/linux_util.h> 47 #include <fs/pseudofs/pseudofs.h> 48 49 #include <compat/linsysfs/linsysfs.h> 50 51 MALLOC_DEFINE(M_LINSYSFS, "linsysfs", "Linsysfs structures"); 52 53 struct scsi_host_queue { 54 TAILQ_ENTRY(scsi_host_queue) scsi_host_next; 55 char *path; 56 char *name; 57 }; 58 59 TAILQ_HEAD(,scsi_host_queue) scsi_host_q; 60 61 static int host_number = 0; 62 63 static int 64 atoi(const char *str) 65 { 66 return (int)strtol(str, (char **)NULL, 10); 67 } 68 69 /* 70 * Filler function for proc_name 71 */ 72 static int 73 linsysfs_scsiname(PFS_FILL_ARGS) 74 { 75 struct scsi_host_queue *scsi_host; 76 int index; 77 78 if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) { 79 index = atoi(&pn->pn_parent->pn_name[4]); 80 } else { 81 sbuf_printf(sb, "unknown\n"); 82 return (0); 83 } 84 TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) { 85 if (index-- == 0) { 86 sbuf_printf(sb, "%s\n", scsi_host->name); 87 return (0); 88 } 89 } 90 sbuf_printf(sb, "unknown\n"); 91 return (0); 92 } 93 94 /* 95 * Filler function for device sym-link 96 */ 97 static int 98 linsysfs_link_scsi_host(PFS_FILL_ARGS) 99 { 100 struct scsi_host_queue *scsi_host; 101 int index; 102 103 if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) { 104 index = atoi(&pn->pn_parent->pn_name[4]); 105 } else { 106 sbuf_printf(sb, "unknown\n"); 107 return (0); 108 } 109 TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) { 110 if (index-- == 0) { 111 sbuf_printf(sb, "../../../devices%s", scsi_host->path); 112 return(0); 113 } 114 } 115 sbuf_printf(sb, "unknown\n"); 116 return (0); 117 } 118 119 static int 120 linsysfs_fill_data(PFS_FILL_ARGS) 121 { 122 sbuf_printf(sb, "%s", (char *)pn->pn_data); 123 return (0); 124 } 125 126 static int 127 linsysfs_fill_vendor(PFS_FILL_ARGS) 128 { 129 sbuf_printf(sb, "0x%04x\n", pci_get_vendor((device_t)pn->pn_data)); 130 return (0); 131 } 132 133 static int 134 linsysfs_fill_device(PFS_FILL_ARGS) 135 { 136 sbuf_printf(sb, "0x%04x\n", pci_get_device((device_t)pn->pn_data)); 137 return (0); 138 } 139 140 static int 141 linsysfs_fill_subvendor(PFS_FILL_ARGS) 142 { 143 sbuf_printf(sb, "0x%04x\n", pci_get_subvendor((device_t)pn->pn_data)); 144 return (0); 145 } 146 147 static int 148 linsysfs_fill_subdevice(PFS_FILL_ARGS) 149 { 150 sbuf_printf(sb, "0x%04x\n", pci_get_subdevice((device_t)pn->pn_data)); 151 return (0); 152 } 153 154 static int 155 linsysfs_fill_revid(PFS_FILL_ARGS) 156 { 157 sbuf_printf(sb, "0x%x\n", pci_get_revid((device_t)pn->pn_data)); 158 return (0); 159 } 160 161 static int 162 linsysfs_fill_config(PFS_FILL_ARGS) 163 { 164 uint8_t config[48]; 165 device_t dev; 166 uint32_t reg; 167 168 dev = (device_t)pn->pn_data; 169 bzero(config, sizeof(config)); 170 reg = pci_get_vendor(dev); 171 config[0] = reg; 172 config[1] = reg >> 8; 173 reg = pci_get_device(dev); 174 config[2] = reg; 175 config[3] = reg >> 8; 176 reg = pci_get_revid(dev); 177 config[8] = reg; 178 reg = pci_get_subvendor(dev); 179 config[44] = reg; 180 config[45] = reg >> 8; 181 reg = pci_get_subdevice(dev); 182 config[46] = reg; 183 config[47] = reg >> 8; 184 sbuf_bcat(sb, config, sizeof(config)); 185 return (0); 186 } 187 188 /* 189 * Filler function for PCI uevent file 190 */ 191 static int 192 linsysfs_fill_uevent_pci(PFS_FILL_ARGS) 193 { 194 device_t dev; 195 196 dev = (device_t)pn->pn_data; 197 sbuf_printf(sb, "DRIVER=%s\nPCI_CLASS=%X\nPCI_ID=%04X:%04X\n" 198 "PCI_SUBSYS_ID=%04X:%04X\nPCI_SLOT_NAME=%04d:%02x:%02x.%x\n", 199 linux_driver_get_name_dev(dev), pci_get_class(dev), 200 pci_get_vendor(dev), pci_get_device(dev), pci_get_subvendor(dev), 201 pci_get_subdevice(dev), pci_get_domain(dev), pci_get_bus(dev), 202 pci_get_slot(dev), pci_get_function(dev)); 203 return (0); 204 } 205 206 /* 207 * Filler function for drm uevent file 208 */ 209 static int 210 linsysfs_fill_uevent_drm(PFS_FILL_ARGS) 211 { 212 device_t dev; 213 int unit; 214 215 dev = (device_t)pn->pn_data; 216 unit = device_get_unit(dev); 217 sbuf_printf(sb, 218 "MAJOR=226\nMINOR=%d\nDEVNAME=dri/card%d\nDEVTYPE=dri_minor\n", 219 unit, unit); 220 return (0); 221 } 222 223 static char * 224 get_full_pfs_path(struct pfs_node *cur) 225 { 226 char *temp, *path; 227 228 temp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 229 path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 230 path[0] = '\0'; 231 232 do { 233 snprintf(temp, MAXPATHLEN, "%s/%s", cur->pn_name, path); 234 strlcpy(path, temp, MAXPATHLEN); 235 cur = cur->pn_parent; 236 } while (cur->pn_parent != NULL); 237 238 path[strlen(path) - 1] = '\0'; /* remove extra slash */ 239 free(temp, M_TEMP); 240 return (path); 241 } 242 243 /* 244 * Filler function for symlink from drm char device to PCI device 245 */ 246 static int 247 linsysfs_fill_vgapci(PFS_FILL_ARGS) 248 { 249 char *path; 250 251 path = get_full_pfs_path((struct pfs_node*)pn->pn_data); 252 sbuf_printf(sb, "../../../%s", path); 253 free(path, M_TEMP); 254 return (0); 255 } 256 257 #undef PCI_DEV 258 #define PCI_DEV "pci" 259 #define DRMN_DEV "drmn" 260 static int 261 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, 262 struct pfs_node *chardev, struct pfs_node *drm, char *path, char *prefix) 263 { 264 struct scsi_host_queue *scsi_host; 265 struct pfs_node *sub_dir, *cur_file; 266 int i, nchildren, error; 267 device_t *children, parent; 268 devclass_t devclass; 269 const char *name = NULL; 270 struct pci_devinfo *dinfo; 271 char *device, *host, *new_path, *devname; 272 273 new_path = path; 274 devname = malloc(16, M_TEMP, M_WAITOK); 275 276 parent = device_get_parent(dev); 277 if (parent) { 278 devclass = device_get_devclass(parent); 279 if (devclass != NULL) 280 name = devclass_get_name(devclass); 281 if (name && strcmp(name, PCI_DEV) == 0) { 282 dinfo = device_get_ivars(dev); 283 if (dinfo) { 284 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 285 new_path = malloc(MAXPATHLEN, M_TEMP, 286 M_WAITOK); 287 new_path[0] = '\000'; 288 strcpy(new_path, path); 289 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 290 device[0] = '\000'; 291 sprintf(device, "%s:%02x:%02x.%x", 292 prefix, 293 dinfo->cfg.bus, 294 dinfo->cfg.slot, 295 dinfo->cfg.func); 296 strcat(new_path, "/"); 297 strcat(new_path, device); 298 dir = pfs_create_dir(dir, device, 299 NULL, NULL, NULL, 0); 300 cur_file = pfs_create_file(dir, "vendor", 301 &linsysfs_fill_vendor, NULL, NULL, NULL, 302 PFS_RD); 303 cur_file->pn_data = (void*)dev; 304 cur_file = pfs_create_file(dir, "device", 305 &linsysfs_fill_device, NULL, NULL, NULL, 306 PFS_RD); 307 cur_file->pn_data = (void*)dev; 308 cur_file = pfs_create_file(dir, 309 "subsystem_vendor", 310 &linsysfs_fill_subvendor, NULL, NULL, NULL, 311 PFS_RD); 312 cur_file->pn_data = (void*)dev; 313 cur_file = pfs_create_file(dir, 314 "subsystem_device", 315 &linsysfs_fill_subdevice, NULL, NULL, NULL, 316 PFS_RD); 317 cur_file->pn_data = (void*)dev; 318 cur_file = pfs_create_file(dir, "revision", 319 &linsysfs_fill_revid, NULL, NULL, NULL, 320 PFS_RD); 321 cur_file->pn_data = (void*)dev; 322 cur_file = pfs_create_file(dir, "config", 323 &linsysfs_fill_config, NULL, NULL, NULL, 324 PFS_RD); 325 cur_file->pn_data = (void*)dev; 326 cur_file = pfs_create_file(dir, "uevent", 327 &linsysfs_fill_uevent_pci, NULL, NULL, 328 NULL, PFS_RD); 329 cur_file->pn_data = (void*)dev; 330 cur_file = pfs_create_link(dir, "subsystem", 331 &linsysfs_fill_data, NULL, NULL, NULL, 0); 332 /* libdrm just checks that the link ends in "/pci" */ 333 cur_file->pn_data = "/sys/bus/pci"; 334 335 if (dinfo->cfg.baseclass == PCIC_STORAGE) { 336 /* DJA only make this if needed */ 337 sprintf(host, "host%d", host_number++); 338 strcat(new_path, "/"); 339 strcat(new_path, host); 340 pfs_create_dir(dir, host, 341 NULL, NULL, NULL, 0); 342 scsi_host = malloc(sizeof( 343 struct scsi_host_queue), 344 M_DEVBUF, M_NOWAIT); 345 scsi_host->path = malloc( 346 strlen(new_path) + 1, 347 M_DEVBUF, M_NOWAIT); 348 scsi_host->path[0] = '\000'; 349 bcopy(new_path, scsi_host->path, 350 strlen(new_path) + 1); 351 scsi_host->name = "unknown"; 352 353 sub_dir = pfs_create_dir(scsi, host, 354 NULL, NULL, NULL, 0); 355 pfs_create_link(sub_dir, "device", 356 &linsysfs_link_scsi_host, 357 NULL, NULL, NULL, 0); 358 pfs_create_file(sub_dir, "proc_name", 359 &linsysfs_scsiname, 360 NULL, NULL, NULL, PFS_RD); 361 scsi_host->name 362 = linux_driver_get_name_dev(dev); 363 TAILQ_INSERT_TAIL(&scsi_host_q, 364 scsi_host, scsi_host_next); 365 } 366 free(device, M_TEMP); 367 free(host, M_TEMP); 368 } 369 } 370 371 devclass = device_get_devclass(dev); 372 if (devclass != NULL) 373 name = devclass_get_name(devclass); 374 else 375 name = NULL; 376 if (name != NULL && strcmp(name, DRMN_DEV) == 0 && 377 device_get_unit(dev) >= 0) { 378 dinfo = device_get_ivars(parent); 379 if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) { 380 pfs_create_dir(dir, "drm", NULL, NULL, NULL, 0); 381 sprintf(devname, "226:%d", 382 device_get_unit(dev)); 383 sub_dir = pfs_create_dir(chardev, 384 devname, NULL, NULL, NULL, 0); 385 cur_file = pfs_create_link(sub_dir, 386 "device", &linsysfs_fill_vgapci, NULL, 387 NULL, NULL, PFS_RD); 388 cur_file->pn_data = (void*)dir; 389 cur_file = pfs_create_file(sub_dir, 390 "uevent", &linsysfs_fill_uevent_drm, NULL, 391 NULL, NULL, PFS_RD); 392 cur_file->pn_data = (void*)dev; 393 sprintf(devname, "card%d", 394 device_get_unit(dev)); 395 sub_dir = pfs_create_dir(drm, 396 devname, NULL, NULL, NULL, 0); 397 cur_file = pfs_create_link(sub_dir, 398 "device", &linsysfs_fill_vgapci, NULL, 399 NULL, NULL, PFS_RD); 400 cur_file->pn_data = (void*)dir; 401 } 402 } 403 } 404 405 error = device_get_children(dev, &children, &nchildren); 406 if (error == 0) { 407 for (i = 0; i < nchildren; i++) 408 if (children[i]) 409 linsysfs_run_bus(children[i], dir, scsi, 410 chardev, drm, new_path, prefix); 411 free(children, M_TEMP); 412 } 413 if (new_path != path) 414 free(new_path, M_TEMP); 415 free(devname, M_TEMP); 416 417 return (1); 418 } 419 420 /* 421 * Filler function for sys/devices/system/cpu/{online,possible,present} 422 */ 423 static int 424 linsysfs_cpuonline(PFS_FILL_ARGS) 425 { 426 427 sbuf_printf(sb, "%d-%d\n", CPU_FIRST(), mp_maxid); 428 return (0); 429 } 430 431 /* 432 * Filler function for sys/devices/system/cpu/cpuX/online 433 */ 434 static int 435 linsysfs_cpuxonline(PFS_FILL_ARGS) 436 { 437 438 sbuf_printf(sb, "1\n"); 439 return (0); 440 } 441 442 static void 443 linsysfs_listcpus(struct pfs_node *dir) 444 { 445 struct pfs_node *cpu; 446 char *name; 447 int i, count, len; 448 449 len = 1; 450 count = mp_maxcpus; 451 while (count > 10) { 452 count /= 10; 453 len++; 454 } 455 len += sizeof("cpu"); 456 name = malloc(len, M_TEMP, M_WAITOK); 457 458 for (i = 0; i < mp_ncpus; ++i) { 459 /* /sys/devices/system/cpu/cpuX */ 460 sprintf(name, "cpu%d", i); 461 cpu = pfs_create_dir(dir, name, NULL, NULL, NULL, 0); 462 463 pfs_create_file(cpu, "online", &linsysfs_cpuxonline, 464 NULL, NULL, NULL, PFS_RD); 465 } 466 free(name, M_TEMP); 467 } 468 469 /* 470 * Constructor 471 */ 472 static int 473 linsysfs_init(PFS_INIT_ARGS) 474 { 475 struct pfs_node *root; 476 struct pfs_node *class; 477 struct pfs_node *dir, *sys, *cpu; 478 struct pfs_node *drm; 479 struct pfs_node *pci; 480 struct pfs_node *scsi; 481 struct pfs_node *devdir, *chardev; 482 struct pfs_node *kernel; 483 devclass_t devclass; 484 device_t dev; 485 486 TAILQ_INIT(&scsi_host_q); 487 488 root = pi->pi_root; 489 490 /* /sys/bus/... */ 491 dir = pfs_create_dir(root, "bus", NULL, NULL, NULL, 0); 492 493 /* /sys/class/... */ 494 class = pfs_create_dir(root, "class", NULL, NULL, NULL, 0); 495 scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0); 496 drm = pfs_create_dir(class, "drm", NULL, NULL, NULL, 0); 497 pfs_create_dir(class, "power_supply", NULL, NULL, NULL, 0); 498 499 /* /sys/class/net/.. */ 500 net = pfs_create_dir(class, "net", NULL, NULL, NULL, 0); 501 502 /* /sys/dev/... */ 503 devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0); 504 chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0); 505 506 /* /sys/devices/... */ 507 dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0); 508 pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0); 509 510 devclass = devclass_find("root"); 511 if (devclass == NULL) { 512 return (0); 513 } 514 515 dev = devclass_get_device(devclass, 0); 516 linsysfs_run_bus(dev, pci, scsi, chardev, drm, "/pci0000:00", "0000"); 517 518 /* /sys/devices/system */ 519 sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0); 520 521 /* /sys/devices/system/cpu */ 522 cpu = pfs_create_dir(sys, "cpu", NULL, NULL, NULL, 0); 523 524 pfs_create_file(cpu, "online", &linsysfs_cpuonline, 525 NULL, NULL, NULL, PFS_RD); 526 pfs_create_file(cpu, "possible", &linsysfs_cpuonline, 527 NULL, NULL, NULL, PFS_RD); 528 pfs_create_file(cpu, "present", &linsysfs_cpuonline, 529 NULL, NULL, NULL, PFS_RD); 530 531 linsysfs_listcpus(cpu); 532 533 /* /sys/kernel */ 534 kernel = pfs_create_dir(root, "kernel", NULL, NULL, NULL, 0); 535 /* /sys/kernel/debug, mountpoint for lindebugfs. */ 536 pfs_create_dir(kernel, "debug", NULL, NULL, NULL, 0); 537 538 linsysfs_net_init(); 539 540 return (0); 541 } 542 543 /* 544 * Destructor 545 */ 546 static int 547 linsysfs_uninit(PFS_INIT_ARGS) 548 { 549 struct scsi_host_queue *scsi_host, *scsi_host_tmp; 550 551 TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next, 552 scsi_host_tmp) { 553 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next); 554 free(scsi_host->path, M_TEMP); 555 free(scsi_host, M_TEMP); 556 } 557 558 linsysfs_net_uninit(); 559 560 return (0); 561 } 562 563 PSEUDOFS(linsysfs, 1, VFCF_JAIL); 564 #if defined(__aarch64__) || defined(__amd64__) 565 MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1); 566 #else 567 MODULE_DEPEND(linsysfs, linux, 1, 1, 1); 568 #endif 569