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