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("$FreeBSD$"); 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 /* 179 * Filler function for PCI uevent file 180 */ 181 static int 182 linsysfs_fill_uevent_pci(PFS_FILL_ARGS) 183 { 184 device_t dev; 185 186 dev = (device_t)pn->pn_data; 187 sbuf_printf(sb, "DRIVER=%s\nPCI_CLASS=%X\nPCI_ID=%04X:%04X\n" 188 "PCI_SUBSYS_ID=%04X:%04X\nPCI_SLOT_NAME=%04d:%02x:%02x.%x\n", 189 linux_driver_get_name_dev(dev), pci_get_class(dev), 190 pci_get_vendor(dev), pci_get_device(dev), pci_get_subvendor(dev), 191 pci_get_subdevice(dev), pci_get_domain(dev), pci_get_bus(dev), 192 pci_get_slot(dev), pci_get_function(dev)); 193 return (0); 194 } 195 196 /* 197 * Filler function for drm uevent file 198 */ 199 static int 200 linsysfs_fill_uevent_drm(PFS_FILL_ARGS) 201 { 202 device_t dev; 203 int unit; 204 205 dev = (device_t)pn->pn_data; 206 unit = device_get_unit(dev); 207 sbuf_printf(sb, 208 "MAJOR=226\nMINOR=%d\nDEVNAME=drm/%d\nDEVTYPE=dri_minor\n", unit, 209 unit); 210 return (0); 211 } 212 213 static char * 214 get_full_pfs_path(struct pfs_node *cur) 215 { 216 char *temp, *path; 217 218 temp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 219 path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 220 path[0] = '\0'; 221 222 do { 223 snprintf(temp, MAXPATHLEN, "%s/%s", cur->pn_name, path); 224 strlcpy(path, temp, MAXPATHLEN); 225 cur = cur->pn_parent; 226 } while (cur->pn_parent != NULL); 227 228 path[strlen(path) - 1] = '\0'; /* remove extra slash */ 229 free(temp, M_TEMP); 230 return (path); 231 } 232 233 /* 234 * Filler function for symlink from drm char device to PCI device 235 */ 236 static int 237 linsysfs_fill_vgapci(PFS_FILL_ARGS) 238 { 239 char *path; 240 241 path = get_full_pfs_path((struct pfs_node*)pn->pn_data); 242 sbuf_printf(sb, "../../../%s", path); 243 free(path, M_TEMP); 244 return (0); 245 } 246 247 #define PCI_DEV "pci" 248 #define DRMN_DEV "drmn" 249 static int 250 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, struct pfs_node *chardev, 251 char *path, char *prefix) 252 { 253 struct scsi_host_queue *scsi_host; 254 struct pfs_node *sub_dir, *cur_file, *cur_chardev; 255 int i, nchildren, error; 256 device_t *children, parent; 257 devclass_t devclass; 258 const char *name = NULL; 259 struct pci_devinfo *dinfo; 260 char *device, *host, *new_path, *chardevname; 261 262 new_path = path; 263 chardevname = malloc(16, M_TEMP, M_WAITOK); 264 265 parent = device_get_parent(dev); 266 if (parent) { 267 devclass = device_get_devclass(parent); 268 if (devclass != NULL) 269 name = devclass_get_name(devclass); 270 if (name && strcmp(name, PCI_DEV) == 0) { 271 dinfo = device_get_ivars(dev); 272 if (dinfo) { 273 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 274 new_path = malloc(MAXPATHLEN, M_TEMP, 275 M_WAITOK); 276 new_path[0] = '\000'; 277 strcpy(new_path, path); 278 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 279 device[0] = '\000'; 280 sprintf(device, "%s:%02x:%02x.%x", 281 prefix, 282 dinfo->cfg.bus, 283 dinfo->cfg.slot, 284 dinfo->cfg.func); 285 strcat(new_path, "/"); 286 strcat(new_path, device); 287 dir = pfs_create_dir(dir, device, 288 NULL, NULL, NULL, 0); 289 cur_file = pfs_create_file(dir, "vendor", 290 &linsysfs_fill_vendor, NULL, NULL, NULL, 291 PFS_RD); 292 cur_file->pn_data = (void*)dev; 293 cur_file = pfs_create_file(dir, "device", 294 &linsysfs_fill_device, NULL, NULL, NULL, 295 PFS_RD); 296 cur_file->pn_data = (void*)dev; 297 cur_file = pfs_create_file(dir, 298 "subsystem_vendor", 299 &linsysfs_fill_subvendor, NULL, NULL, NULL, 300 PFS_RD); 301 cur_file->pn_data = (void*)dev; 302 cur_file = pfs_create_file(dir, 303 "subsystem_device", 304 &linsysfs_fill_subdevice, NULL, NULL, NULL, 305 PFS_RD); 306 cur_file->pn_data = (void*)dev; 307 cur_file = pfs_create_file(dir, "revision", 308 &linsysfs_fill_revid, NULL, NULL, NULL, 309 PFS_RD); 310 cur_file->pn_data = (void*)dev; 311 cur_file = pfs_create_file(dir, "uevent", 312 &linsysfs_fill_uevent_pci, NULL, NULL, 313 NULL, PFS_RD); 314 cur_file->pn_data = (void*)dev; 315 cur_file = pfs_create_link(dir, "subsystem", 316 &linsysfs_fill_data, NULL, NULL, NULL, 0); 317 /* libdrm just checks that the link ends in "/pci" */ 318 cur_file->pn_data = "/sys/bus/pci"; 319 320 if (dinfo->cfg.baseclass == PCIC_STORAGE) { 321 /* DJA only make this if needed */ 322 sprintf(host, "host%d", host_number++); 323 strcat(new_path, "/"); 324 strcat(new_path, host); 325 pfs_create_dir(dir, host, 326 NULL, NULL, NULL, 0); 327 scsi_host = malloc(sizeof( 328 struct scsi_host_queue), 329 M_DEVBUF, M_NOWAIT); 330 scsi_host->path = malloc( 331 strlen(new_path) + 1, 332 M_DEVBUF, M_NOWAIT); 333 scsi_host->path[0] = '\000'; 334 bcopy(new_path, scsi_host->path, 335 strlen(new_path) + 1); 336 scsi_host->name = "unknown"; 337 338 sub_dir = pfs_create_dir(scsi, host, 339 NULL, NULL, NULL, 0); 340 pfs_create_link(sub_dir, "device", 341 &linsysfs_link_scsi_host, 342 NULL, NULL, NULL, 0); 343 pfs_create_file(sub_dir, "proc_name", 344 &linsysfs_scsiname, 345 NULL, NULL, NULL, PFS_RD); 346 scsi_host->name 347 = linux_driver_get_name_dev(dev); 348 TAILQ_INSERT_TAIL(&scsi_host_q, 349 scsi_host, scsi_host_next); 350 } 351 free(device, M_TEMP); 352 free(host, M_TEMP); 353 } 354 } 355 356 devclass = device_get_devclass(dev); 357 if (devclass != NULL) 358 name = devclass_get_name(devclass); 359 else 360 name = NULL; 361 if (name != NULL && strcmp(name, DRMN_DEV) == 0 && 362 device_get_unit(dev) >= 0) { 363 dinfo = device_get_ivars(parent); 364 if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) { 365 sprintf(chardevname, "226:%d", 366 device_get_unit(dev)); 367 cur_chardev = pfs_create_dir(chardev, 368 chardevname, NULL, NULL, NULL, 0); 369 cur_file = pfs_create_link(cur_chardev, 370 "device", &linsysfs_fill_vgapci, NULL, 371 NULL, NULL, PFS_RD); 372 cur_file->pn_data = (void*)dir; 373 cur_file = pfs_create_file(cur_chardev, 374 "uevent", &linsysfs_fill_uevent_drm, NULL, 375 NULL, NULL, PFS_RD); 376 cur_file->pn_data = (void*)dev; 377 } 378 } 379 } 380 381 error = device_get_children(dev, &children, &nchildren); 382 if (error == 0) { 383 for (i = 0; i < nchildren; i++) 384 if (children[i]) 385 linsysfs_run_bus(children[i], dir, scsi, 386 chardev, new_path, prefix); 387 free(children, M_TEMP); 388 } 389 if (new_path != path) 390 free(new_path, M_TEMP); 391 free(chardevname, M_TEMP); 392 393 return (1); 394 } 395 396 /* 397 * Filler function for sys/devices/system/cpu/online 398 */ 399 static int 400 linsysfs_cpuonline(PFS_FILL_ARGS) 401 { 402 403 sbuf_printf(sb, "%d-%d\n", CPU_FIRST(), mp_maxid); 404 return (0); 405 } 406 407 /* 408 * Filler function for sys/devices/system/cpu/cpuX/online 409 */ 410 static int 411 linsysfs_cpuxonline(PFS_FILL_ARGS) 412 { 413 414 sbuf_printf(sb, "1\n"); 415 return (0); 416 } 417 418 static void 419 linsysfs_listcpus(struct pfs_node *dir) 420 { 421 struct pfs_node *cpu; 422 char *name; 423 int i, count, len; 424 425 len = 1; 426 count = mp_maxcpus; 427 while (count > 10) { 428 count /= 10; 429 len++; 430 } 431 len += sizeof("cpu"); 432 name = malloc(len, M_TEMP, M_WAITOK); 433 434 for (i = 0; i < mp_ncpus; ++i) { 435 /* /sys/devices/system/cpu/cpuX */ 436 sprintf(name, "cpu%d", i); 437 cpu = pfs_create_dir(dir, name, NULL, NULL, NULL, 0); 438 439 pfs_create_file(cpu, "online", &linsysfs_cpuxonline, 440 NULL, NULL, NULL, PFS_RD); 441 } 442 free(name, M_TEMP); 443 } 444 445 /* 446 * Constructor 447 */ 448 static int 449 linsysfs_init(PFS_INIT_ARGS) 450 { 451 struct pfs_node *root; 452 struct pfs_node *dir, *sys, *cpu; 453 struct pfs_node *pci; 454 struct pfs_node *scsi; 455 struct pfs_node *devdir, *chardev; 456 devclass_t devclass; 457 device_t dev; 458 459 TAILQ_INIT(&scsi_host_q); 460 461 root = pi->pi_root; 462 463 /* /sys/class/... */ 464 scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0); 465 scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0); 466 467 /* /sys/devices */ 468 dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0); 469 470 /* /sys/devices/pci0000:00 */ 471 pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0); 472 473 /* /sys/dev/char */ 474 devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0); 475 chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0); 476 477 devclass = devclass_find("root"); 478 if (devclass == NULL) { 479 return (0); 480 } 481 482 dev = devclass_get_device(devclass, 0); 483 linsysfs_run_bus(dev, pci, scsi, chardev, "/pci0000:00", "0000"); 484 485 /* /sys/devices/system */ 486 sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0); 487 488 /* /sys/devices/system/cpu */ 489 cpu = pfs_create_dir(sys, "cpu", NULL, NULL, NULL, 0); 490 491 pfs_create_file(cpu, "online", &linsysfs_cpuonline, 492 NULL, NULL, NULL, PFS_RD); 493 494 linsysfs_listcpus(cpu); 495 496 return (0); 497 } 498 499 /* 500 * Destructor 501 */ 502 static int 503 linsysfs_uninit(PFS_INIT_ARGS) 504 { 505 struct scsi_host_queue *scsi_host, *scsi_host_tmp; 506 507 TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next, 508 scsi_host_tmp) { 509 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next); 510 free(scsi_host->path, M_TEMP); 511 free(scsi_host, M_TEMP); 512 } 513 514 return (0); 515 } 516 517 PSEUDOFS(linsysfs, 1, PR_ALLOW_MOUNT_LINSYSFS); 518 #if defined(__amd64__) 519 MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1); 520 #else 521 MODULE_DEPEND(linsysfs, linux, 1, 1, 1); 522 #endif 523