1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <devfsadm.h> 30 #include <stdio.h> 31 #include <strings.h> 32 #include <stdlib.h> 33 #include <stdarg.h> 34 #include <limits.h> 35 #include <unistd.h> 36 #include <config_admin.h> 37 #include <cfg_link.h> 38 #include <sys/types.h> 39 #include <sys/mkdev.h> 40 #include <sys/hotplug/pci/pcihp.h> 41 42 #ifdef DEBUG 43 #define dprint(args) devfsadm_errprint args 44 /* 45 * for use in print routine arg list as a shorthand way to locate node via 46 * "prtconf -D" to avoid messy and cluttered debugging code 47 * don't forget the corresponding "%s%d" format 48 */ 49 #define DRVINST(node) di_driver_name(node), di_instance(node) 50 #else 51 #define dprint(args) 52 #endif 53 54 55 static int scsi_cfg_creat_cb(di_minor_t minor, di_node_t node); 56 static int sbd_cfg_creat_cb(di_minor_t minor, di_node_t node); 57 static int usb_cfg_creat_cb(di_minor_t minor, di_node_t node); 58 static char *get_roothub(const char *path, void *cb_arg); 59 static int pci_cfg_creat_cb(di_minor_t minor, di_node_t node); 60 static int ib_cfg_creat_cb(di_minor_t minor, di_node_t node); 61 static int sata_cfg_creat_cb(di_minor_t minor, di_node_t node); 62 63 static di_node_t pci_cfg_chassis_node(di_node_t, di_prom_handle_t); 64 static char *pci_cfg_slotname(di_node_t, di_prom_handle_t, minor_t); 65 static int pci_cfg_ap_node(minor_t, di_node_t, di_prom_handle_t, 66 char *, int, int); 67 static int pci_cfg_iob_name(di_minor_t, di_node_t, di_prom_handle_t, 68 char *, int); 69 static minor_t pci_cfg_pcidev(di_node_t, di_prom_handle_t); 70 static int pci_cfg_ap_path(di_minor_t, di_node_t, di_prom_handle_t, 71 char *, int, char **); 72 static char *pci_cfg_info_data(char *); 73 static int pci_cfg_is_ap_path(di_node_t, di_prom_handle_t); 74 static int pci_cfg_ap_legacy(di_minor_t, di_node_t, di_prom_handle_t, 75 char *, int); 76 static void pci_cfg_rm_invalid_links(char *, char *); 77 static void pci_cfg_rm_link(char *); 78 static void pci_cfg_rm_all(char *); 79 static char *pci_cfg_devpath(di_node_t, di_minor_t); 80 static di_node_t pci_cfg_snapshot(di_node_t, di_minor_t, 81 di_node_t *, di_minor_t *); 82 83 /* flag definitions for di_propall_*(); value "0" is always the default flag */ 84 #define DIPROP_PRI_NODE 0x0 85 #define DIPROP_PRI_PROM 0x1 86 static int di_propall_lookup_ints(di_prom_handle_t, int, 87 dev_t, di_node_t, const char *, int **); 88 static int di_propall_lookup_strings(di_prom_handle_t, int, 89 dev_t, di_node_t, const char *, char **); 90 91 92 /* 93 * NOTE: The CREATE_DEFER flag is private to this module. 94 * NOT to be used by other modules 95 */ 96 static devfsadm_create_t cfg_create_cbt[] = { 97 { "attachment-point", DDI_NT_SCSI_ATTACHMENT_POINT, NULL, 98 TYPE_EXACT | CREATE_DEFER, ILEVEL_0, scsi_cfg_creat_cb 99 }, 100 { "attachment-point", DDI_NT_SBD_ATTACHMENT_POINT, NULL, 101 TYPE_EXACT, ILEVEL_0, sbd_cfg_creat_cb 102 }, 103 { "fc-attachment-point", DDI_NT_FC_ATTACHMENT_POINT, NULL, 104 TYPE_EXACT | CREATE_DEFER, ILEVEL_0, scsi_cfg_creat_cb 105 }, 106 { "attachment-point", DDI_NT_USB_ATTACHMENT_POINT, NULL, 107 TYPE_EXACT, ILEVEL_0, usb_cfg_creat_cb 108 }, 109 { "attachment-point", DDI_NT_PCI_ATTACHMENT_POINT, NULL, 110 TYPE_EXACT, ILEVEL_0, pci_cfg_creat_cb 111 }, 112 { "attachment-point", DDI_NT_IB_ATTACHMENT_POINT, NULL, 113 TYPE_EXACT, ILEVEL_0, ib_cfg_creat_cb 114 }, 115 { "attachment-point", DDI_NT_SATA_ATTACHMENT_POINT, NULL, 116 TYPE_EXACT, ILEVEL_0, sata_cfg_creat_cb 117 } 118 }; 119 120 DEVFSADM_CREATE_INIT_V0(cfg_create_cbt); 121 122 static devfsadm_remove_t cfg_remove_cbt[] = { 123 { "attachment-point", SCSI_CFG_LINK_RE, RM_POST, 124 ILEVEL_0, devfsadm_rm_all 125 }, 126 { "attachment-point", SBD_CFG_LINK_RE, RM_POST, 127 ILEVEL_0, devfsadm_rm_all 128 }, 129 { "fc-attachment-point", SCSI_CFG_LINK_RE, RM_POST, 130 ILEVEL_0, devfsadm_rm_all 131 }, 132 { "attachment-point", USB_CFG_LINK_RE, RM_POST|RM_HOT|RM_ALWAYS, 133 ILEVEL_0, devfsadm_rm_all 134 }, 135 { "attachment-point", PCI_CFG_LINK_RE, RM_POST, 136 ILEVEL_0, devfsadm_rm_all 137 }, 138 { "attachment-point", PCI_CFG_PATH_LINK_RE, RM_POST|RM_HOT, 139 ILEVEL_0, pci_cfg_rm_all 140 }, 141 { "attachment-point", IB_CFG_LINK_RE, RM_POST|RM_HOT|RM_ALWAYS, 142 ILEVEL_0, devfsadm_rm_all 143 }, 144 { "attachment-point", SATA_CFG_LINK_RE, RM_POST|RM_HOT|RM_ALWAYS, 145 ILEVEL_0, devfsadm_rm_all 146 } 147 }; 148 149 DEVFSADM_REMOVE_INIT_V0(cfg_remove_cbt); 150 151 static int 152 scsi_cfg_creat_cb(di_minor_t minor, di_node_t node) 153 { 154 char path[PATH_MAX + 1]; 155 char *c_num = NULL, *devfs_path, *mn; 156 devfsadm_enumerate_t rules[3] = { 157 {"^r?dsk$/^c([0-9]+)", 1, MATCH_PARENT}, 158 {"^cfg$/^c([0-9]+)$", 1, MATCH_ADDR}, 159 {"^scsi$/^.+$/^c([0-9]+)", 1, MATCH_PARENT} 160 }; 161 162 mn = di_minor_name(minor); 163 164 if ((devfs_path = di_devfs_path(node)) == NULL) { 165 return (DEVFSADM_CONTINUE); 166 } 167 (void) strcpy(path, devfs_path); 168 (void) strcat(path, ":"); 169 (void) strcat(path, mn); 170 di_devfs_path_free(devfs_path); 171 172 if (devfsadm_enumerate_int(path, 1, &c_num, rules, 3) 173 == DEVFSADM_FAILURE) { 174 /* 175 * Unlike the disks module we don't retry on failure. 176 * If we have multiple "c" numbers for a single physical 177 * controller due to bug 4045879, we will not assign a 178 * c-number/symlink for the controller. 179 */ 180 return (DEVFSADM_CONTINUE); 181 } 182 183 (void) strcpy(path, CFG_DIRNAME); 184 (void) strcat(path, "/c"); 185 (void) strcat(path, c_num); 186 187 free(c_num); 188 189 (void) devfsadm_mklink(path, node, minor, 0); 190 191 return (DEVFSADM_CONTINUE); 192 } 193 194 static int 195 sbd_cfg_creat_cb(di_minor_t minor, di_node_t node) 196 { 197 char path[PATH_MAX + 1]; 198 199 (void) strcpy(path, CFG_DIRNAME); 200 (void) strcat(path, "/"); 201 (void) strcat(path, di_minor_name(minor)); 202 (void) devfsadm_mklink(path, node, minor, 0); 203 return (DEVFSADM_CONTINUE); 204 } 205 206 207 static int 208 usb_cfg_creat_cb(di_minor_t minor, di_node_t node) 209 { 210 char *cp, path[PATH_MAX + 1]; 211 devfsadm_enumerate_t rules[1] = 212 {"^cfg$/^usb([0-9]+)$", 1, MATCH_CALLBACK, NULL, get_roothub}; 213 214 if ((cp = di_devfs_path(node)) == NULL) { 215 return (DEVFSADM_CONTINUE); 216 } 217 218 (void) snprintf(path, sizeof (path), "%s:%s", cp, di_minor_name(minor)); 219 di_devfs_path_free(cp); 220 221 if (devfsadm_enumerate_int(path, 0, &cp, rules, 1)) { 222 return (DEVFSADM_CONTINUE); 223 } 224 225 /* create usbN and the symlink */ 226 (void) snprintf(path, sizeof (path), "%s/usb%s/%s", CFG_DIRNAME, cp, 227 di_minor_name(minor)); 228 free(cp); 229 230 (void) devfsadm_mklink(path, node, minor, 0); 231 232 return (DEVFSADM_CONTINUE); 233 } 234 235 236 static int 237 sata_cfg_creat_cb(di_minor_t minor, di_node_t node) 238 { 239 char path[PATH_MAX + 1], l_path[PATH_MAX], *buf, *devfspath; 240 char *minor_nm; 241 devfsadm_enumerate_t rules[1] = 242 {"^cfg$/^sata([0-9]+)$", 1, MATCH_ADDR}; 243 244 minor_nm = di_minor_name(minor); 245 if (minor_nm == NULL) 246 return (DEVFSADM_CONTINUE); 247 248 devfspath = di_devfs_path(node); 249 if (devfspath == NULL) 250 return (DEVFSADM_CONTINUE); 251 252 (void) strlcpy(path, devfspath, sizeof (path)); 253 (void) strlcat(path, ":", sizeof (path)); 254 (void) strlcat(path, minor_nm, sizeof (path)); 255 di_devfs_path_free(devfspath); 256 257 /* build the physical path from the components */ 258 if (devfsadm_enumerate_int(path, 0, &buf, rules, 1) == 259 DEVFSADM_FAILURE) { 260 return (DEVFSADM_CONTINUE); 261 } 262 263 (void) snprintf(l_path, sizeof (l_path), "%s/sata%s/%s", CFG_DIRNAME, 264 buf, minor_nm); 265 free(buf); 266 267 (void) devfsadm_mklink(l_path, node, minor, 0); 268 269 return (DEVFSADM_CONTINUE); 270 } 271 272 273 /* 274 * get_roothub: 275 * figure out the root hub path to calculate /dev/cfg/usbN 276 */ 277 /* ARGSUSED */ 278 static char * 279 get_roothub(const char *path, void *cb_arg) 280 { 281 int i, count = 0; 282 char *physpath, *cp; 283 284 /* make a copy */ 285 if ((physpath = strdup(path)) == NULL) { 286 return (NULL); 287 } 288 289 /* 290 * physpath must always have a minor name component 291 */ 292 if ((cp = strrchr(physpath, ':')) == NULL) { 293 free(physpath); 294 return (NULL); 295 } 296 *cp++ = '\0'; 297 298 /* 299 * No '.' in the minor name indicates a roothub port. 300 */ 301 if (strchr(cp, '.') == NULL) { 302 /* roothub device */ 303 return (physpath); 304 } 305 306 while (*cp) { 307 if (*cp == '.') 308 count++; 309 cp++; 310 } 311 312 /* Remove as many trailing path components as there are '.'s */ 313 for (i = 0; i < count; i++) { 314 if ((cp = strrchr(physpath, '/')) == NULL || (cp == physpath)) { 315 free(physpath); 316 return (NULL); 317 } 318 *cp = '\0'; 319 } 320 321 return (physpath); 322 } 323 324 325 /* 326 * returns an allocted string containing the device path for <node> and 327 * <minor> 328 */ 329 static char * 330 pci_cfg_devpath(di_node_t node, di_minor_t minor) 331 { 332 char *path; 333 char *bufp; 334 char *minor_nm; 335 int buflen; 336 337 path = di_devfs_path(node); 338 minor_nm = di_minor_name(minor); 339 buflen = snprintf(NULL, 0, "%s:%s", path, minor_nm); 340 341 bufp = malloc(sizeof (char) * buflen); 342 if (bufp == NULL) 343 goto OUT; 344 (void) snprintf(bufp, buflen, "%s:%s", path, minor_nm); 345 346 OUT: 347 di_devfs_path_free(path); 348 return (bufp); 349 } 350 351 352 static int 353 di_propall_lookup_ints(di_prom_handle_t ph, int flags, 354 dev_t dev, di_node_t node, const char *prop_name, int **prop_data) 355 { 356 int rv; 357 358 if (flags & DIPROP_PRI_PROM) { 359 rv = di_prom_prop_lookup_ints(ph, node, prop_name, prop_data); 360 if (rv < 0) 361 rv = di_prop_lookup_ints(dev, node, prop_name, 362 prop_data); 363 } else { 364 rv = di_prop_lookup_ints(dev, node, prop_name, prop_data); 365 if (rv < 0) 366 rv = di_prom_prop_lookup_ints(ph, node, prop_name, 367 prop_data); 368 } 369 return (rv); 370 } 371 372 373 static int 374 di_propall_lookup_strings(di_prom_handle_t ph, int flags, 375 dev_t dev, di_node_t node, const char *prop_name, char **prop_data) 376 { 377 int rv; 378 379 if (flags & DIPROP_PRI_PROM) { 380 rv = di_prom_prop_lookup_strings(ph, node, prop_name, 381 prop_data); 382 if (rv < 0) 383 rv = di_prop_lookup_strings(dev, node, prop_name, 384 prop_data); 385 } else { 386 rv = di_prop_lookup_strings(dev, node, prop_name, prop_data); 387 if (rv < 0) 388 rv = di_prom_prop_lookup_strings(ph, node, prop_name, 389 prop_data); 390 } 391 return (rv); 392 } 393 394 395 static di_node_t 396 pci_cfg_chassis_node(di_node_t node, di_prom_handle_t ph) 397 { 398 di_node_t curnode = node; 399 int *firstchas; 400 401 do { 402 if (di_propall_lookup_ints(ph, 0, DDI_DEV_T_ANY, curnode, 403 PROP_FIRST_CHAS, &firstchas) >= 0) 404 return (curnode); 405 } while ((curnode = di_parent_node(curnode)) != DI_NODE_NIL); 406 407 return (DI_NODE_NIL); 408 } 409 410 411 /* 412 * yet another redundant common routine to: 413 * decode the ieee1275 "slot-names" property and returns the string matching 414 * the pci device number <pci_dev>, if any. 415 * 416 * callers must NOT free the returned string 417 * 418 * "slot-names" format: [int][string1][string2]...[stringN] 419 * - each bit position in [int] represent a pci device number 420 * - [string1]...[stringN] are concatenated null-terminated strings 421 * - the number of bits set in [int] == the number of strings that follow 422 * - each bit that is set corresponds to a string in the following segment 423 */ 424 static char * 425 pci_cfg_slotname(di_node_t node, di_prom_handle_t ph, minor_t pci_dev) 426 { 427 #ifdef DEBUG 428 char *fnm = "pci_cfg_slotname"; 429 #endif 430 int *snp; 431 int snlen; 432 int snentlen = sizeof (int); 433 int i, max, len, place, curplace; 434 char *str; 435 436 snlen = di_propall_lookup_ints(ph, 0, DDI_DEV_T_ANY, node, 437 PROP_SLOT_NAMES, &snp); 438 if (snlen < 1) 439 return (NULL); 440 if ((snp[0] & (1 << pci_dev)) == 0) 441 return (NULL); 442 443 /* 444 * pci device number must be less than the amount of bits in the first 445 * [int] component of slot-names 446 */ 447 if (pci_dev >= snentlen * 8) { 448 dprint(("%s: pci_dev out of range for %s%d\n", 449 fnm, DRVINST(node))); 450 return (NULL); 451 } 452 453 place = 0; 454 for (i = 0; i < pci_dev; i++) { 455 if (snp[0] & (1 << i)) 456 place++; 457 } 458 459 max = (snlen * snentlen) - snentlen; 460 str = (char *)&snp[1]; 461 i = 0; 462 curplace = 0; 463 while (i < max && curplace < place) { 464 len = strlen(str); 465 if (len <= 0) 466 break; 467 str += len + 1; 468 i += len + 1; 469 curplace++; 470 } 471 /* the following condition indicates a badly formed slot-names */ 472 if (i >= max || *str == '\0') { 473 dprint(("%s: badly formed slot-names for %s%d\n", 474 fnm, DRVINST(node))); 475 str = NULL; 476 } 477 return (str); 478 } 479 480 481 /* 482 * returns non-zero if we can return a valid attachment point name for <node>, 483 * for its slot identified by child pci device number <pci_dev>, through <buf> 484 * 485 * prioritized naming scheme: 486 * 1) <PROP_SLOT_NAMES property> (see pci_cfg_slotname()) 487 * 2) <device-type><PROP_PHYS_SLOT property> 488 * 3) <drv name><drv inst>.<device-type><pci_dev> 489 * 490 * where <device-type> is derived from the PROP_DEV_TYPE property: 491 * if its value is "pciex" then <device-type> is "pcie" 492 * else the raw value is used 493 * 494 * if <flags> contains APNODE_DEFNAME, then scheme (3) is used 495 */ 496 static int 497 pci_cfg_ap_node(minor_t pci_dev, di_node_t node, di_prom_handle_t ph, 498 char *buf, int bufsz, int flags) 499 { 500 int *nump; 501 int rv; 502 char *str, *devtype; 503 504 rv = di_propall_lookup_strings(ph, 0, DDI_DEV_T_ANY, node, 505 PROP_DEV_TYPE, &devtype); 506 if (rv < 1) 507 return (0); 508 509 if (strcmp(devtype, PROPVAL_PCIEX) == 0) 510 devtype = DEVTYPE_PCIE; 511 512 if (flags & APNODE_DEFNAME) 513 goto DEF; 514 515 str = pci_cfg_slotname(node, ph, pci_dev); 516 if (str != NULL) { 517 (void) strlcpy(buf, str, bufsz); 518 return (1); 519 } 520 521 if (di_propall_lookup_ints(ph, 0, DDI_DEV_T_ANY, node, PROP_PHYS_SLOT, 522 &nump) > 0) { 523 if (*nump > 0) { 524 (void) snprintf(buf, bufsz, "%s%d", devtype, *nump); 525 return (1); 526 } 527 } 528 DEF: 529 (void) snprintf(buf, bufsz, "%s%d.%s%d", 530 di_driver_name(node), di_instance(node), devtype, pci_dev); 531 532 return (1); 533 } 534 535 536 /* 537 * returns non-zero if we can return a valid expansion chassis name for <node> 538 * through <buf> 539 * 540 * prioritized naming scheme: 541 * 1) <IOB_PRE string><PROP_SERID property: sun specific portion> 542 * 2) <IOB_PRE string><full PROP_SERID property in hex> 543 * 3) <IOB_PRE string> 544 * 545 * PROP_SERID encoding <64-bit int: msb ... lsb>: 546 * <24 bits: vendor id><40 bits: serial number> 547 * 548 * sun encoding of 40 bit serial number: 549 * first byte = device type indicator (ignored in naming scheme) 550 * next 4 bytes = 4 ascii characters 551 */ 552 /*ARGSUSED*/ 553 static int 554 pci_cfg_iob_name(di_minor_t minor, di_node_t node, di_prom_handle_t ph, 555 char *buf, int bufsz) 556 { 557 int64_t *seridp; 558 int64_t serid; 559 char *idstr; 560 561 if (di_prop_lookup_int64(DDI_DEV_T_ANY, node, PROP_SERID, 562 &seridp) < 1) { 563 (void) strlcpy(buf, IOB_PRE, bufsz); 564 return (1); 565 } 566 serid = *seridp; 567 568 if (serid >> 40 != VENDID_SUN) { 569 (void) snprintf(buf, bufsz, "%s%llx", IOB_PRE, serid); 570 return (1); 571 } 572 573 serid &= SIZE2MASK64(40); 574 idstr = (char *)&serid; 575 idstr[sizeof (serid) - 1] = '\0'; 576 /* skip device type indicator */ 577 idstr++; 578 (void) snprintf(buf, bufsz, "%s%s", IOB_PRE, idstr); 579 return (1); 580 } 581 582 583 static minor_t 584 pci_cfg_pcidev(di_node_t node, di_prom_handle_t ph) 585 { 586 int rv; 587 int *regp; 588 589 rv = di_propall_lookup_ints(ph, 0, DDI_DEV_T_ANY, node, PROP_REG, 590 ®p); 591 592 if (rv < 1) { 593 dprint(("pci_cfg_pcidev: property %s not found " 594 "for %s%d\n", PROP_REG, DRVINST(node))); 595 return (rv); 596 } 597 598 return (REG_PCIDEV(regp)); 599 } 600 601 602 /* 603 * returns non-zero when it can successfully return an attachment point 604 * through <ap_path> whose length is less than <ap_pathsz>; returns the full 605 * path of the AP through <pathret> which may be larger than <ap_pathsz>. 606 * Callers need to free <pathret>. If it cannot return the full path through 607 * <pathret> it will be set to NULL 608 * 609 * The ap path reflects a subset of the device path from an onboard host slot 610 * up to <node>. We traverse up the device tree starting from <node>, naming 611 * each component using pci_cfg_ap_node(). If we detect that a certain 612 * segment is contained within an expansion chassis, then we skip any bus 613 * nodes in between our current node and the topmost node of the chassis, 614 * which is identified by the PROP_FIRST_CHAS property, and prepend the name 615 * of the expansion chassis as given by pci_cfg_iob_name() 616 * 617 * This scheme is always used for <pathret>. If however, the size of 618 * <pathret> is greater than <ap_pathsz> then only the default name as given 619 * by pci_cfg_ap_node() for <node> will be used 620 */ 621 static int 622 pci_cfg_ap_path(di_minor_t minor, di_node_t node, di_prom_handle_t ph, 623 char *ap_path, int ap_pathsz, char **pathret) 624 { 625 #ifdef DEBUG 626 char *fnm = "pci_cfg_ap_path"; 627 #endif 628 #define seplen (sizeof (AP_PATH_SEP) - 1) 629 #define iob_pre_len (sizeof (IOB_PRE) - 1) 630 #define ap_path_iob_sep_len (sizeof (AP_PATH_IOB_SEP) - 1) 631 632 char *bufptr; 633 char buf[MAXPATHLEN]; 634 char pathbuf[MAXPATHLEN]; 635 int bufsz; 636 char *pathptr; 637 char *pathend = NULL; 638 int len; 639 int rv = 0; 640 int chasflag = 0; 641 di_node_t curnode = node; 642 di_node_t chasnode = DI_NODE_NIL; 643 minor_t pci_dev; 644 645 buf[0] = '\0'; 646 pathbuf[0] = '\0'; 647 pathptr = &pathbuf[sizeof (pathbuf) - 1]; 648 *pathptr = '\0'; 649 650 /* 651 * as we traverse up the device tree, we prepend components of our 652 * path inside pathbuf, using pathptr and decrementing 653 */ 654 pci_dev = PCIHP_AP_MINOR_NUM_TO_PCI_DEVNUM(di_minor_devt(minor)); 655 do { 656 bufptr = buf; 657 bufsz = sizeof (buf); 658 659 chasnode = pci_cfg_chassis_node(curnode, ph); 660 if (chasnode != DI_NODE_NIL) { 661 rv = pci_cfg_iob_name(minor, chasnode, ph, 662 bufptr, bufsz); 663 if (rv == 0) { 664 dprint(("%s: cannot create iob name " 665 "for %s%d\n", fnm, DRVINST(node))); 666 *pathptr = '\0'; 667 goto OUT; 668 } 669 670 (void) strncat(bufptr, AP_PATH_IOB_SEP, bufsz); 671 len = strlen(bufptr); 672 bufptr += len; 673 bufsz -= len - 1; 674 675 /* set chasflag when the leaf node is within an iob */ 676 if ((curnode == node) != NULL) 677 chasflag = 1; 678 } 679 rv = pci_cfg_ap_node(pci_dev, curnode, ph, bufptr, bufsz, 0); 680 if (rv == 0) { 681 dprint(("%s: cannot create ap node name " 682 "for %s%d\n", fnm, DRVINST(node))); 683 *pathptr = '\0'; 684 goto OUT; 685 } 686 687 /* 688 * if we can't fit the entire path in our pathbuf, then use 689 * the default short name and nullify pathptr; also, since 690 * we prepend in the buffer, we must avoid adding a null char 691 */ 692 if (curnode != node) { 693 pathptr -= seplen; 694 if (pathptr < pathbuf) { 695 pathptr = pathbuf; 696 *pathptr = '\0'; 697 goto DEF; 698 } 699 (void) memcpy(pathptr, AP_PATH_SEP, seplen); 700 } 701 len = strlen(buf); 702 pathptr -= len; 703 if (pathptr < pathbuf) { 704 pathptr = pathbuf; 705 *pathptr = '\0'; 706 goto DEF; 707 } 708 (void) memcpy(pathptr, buf, len); 709 710 /* remember the leaf component */ 711 if (curnode == node) 712 pathend = pathptr; 713 714 /* 715 * go no further than the hosts' onboard slots 716 */ 717 if (chasnode == DI_NODE_NIL) 718 break; 719 curnode = chasnode; 720 721 /* 722 * the pci device number of the current node is used to 723 * identify which slot of the parent's bus (next iteration) 724 * the current node is on 725 */ 726 pci_dev = pci_cfg_pcidev(curnode, ph); 727 } while ((curnode = di_parent_node(curnode)) != DI_NODE_NIL); 728 729 pathbuf[sizeof (pathbuf) - 1] = '\0'; 730 if (strlen(pathptr) < ap_pathsz) { 731 (void) strlcpy(ap_path, pathptr, ap_pathsz); 732 rv = 1; 733 goto OUT; 734 } 735 736 DEF: 737 /* 738 * when our name won't fit <ap_pathsz> we use the endpoint/leaf 739 * <node>'s name ONLY IF it has a serialid# which will make the apid 740 * globally unique 741 */ 742 if (chasflag && pathend != NULL) { 743 if ((strncmp(pathend + iob_pre_len, AP_PATH_IOB_SEP, 744 ap_path_iob_sep_len) != 0) && 745 (strlen(pathend) < ap_pathsz)) { 746 (void) strlcpy(ap_path, pathend, ap_pathsz); 747 rv = 1; 748 goto OUT; 749 } 750 } 751 752 /* 753 * if our name still won't fit <ap_pathsz>, then use the leaf <node>'s 754 * default name 755 */ 756 rv = pci_cfg_ap_node(pci_dev, node, ph, buf, bufsz, APNODE_DEFNAME); 757 if (rv == 0) { 758 dprint(("%s: cannot create default ap node name for %s%d\n", 759 fnm, DRVINST(node))); 760 *pathptr = '\0'; 761 goto OUT; 762 } 763 if (strlen(buf) < ap_pathsz) { 764 (void) strlcpy(ap_path, buf, ap_pathsz); 765 rv = 1; 766 goto OUT; 767 } 768 769 /* 770 * in this case, cfgadm goes through an expensive process to generate 771 * a purely dynamic logical apid: the framework will look through 772 * the device tree for attachment point minor nodes and will invoke 773 * each plugin responsible for that attachment point class, and if 774 * the plugin returns a logical apid that matches the queried apid 775 * or matches the default apid generated by the cfgadm framework for 776 * that driver/class (occurs when plugin returns an empty logical apid) 777 * then that is what it will use 778 * 779 * it is doubly expensive because the cfgadm pci plugin itself will 780 * also search the entire device tree in the absence of a link 781 */ 782 rv = 0; 783 dprint(("%s: cannot create apid for %s%d within length of %d\n", 784 fnm, DRVINST(node), ap_pathsz)); 785 786 OUT: 787 ap_path[ap_pathsz - 1] = '\0'; 788 *pathret = (*pathptr == '\0') ? NULL : strdup(pathptr); 789 return (rv); 790 791 #undef seplen 792 #undef iob_pre_len 793 #undef ap_path_iob_sep_len 794 } 795 796 797 /* 798 * the PROP_AP_NAMES property contains the first integer section of the 799 * ieee1275 "slot-names" property and functions as a bitmask; see comment for 800 * pci_cfg_slotname() 801 * 802 * we use the name of the attachment point minor node if its pci device 803 * number (encoded in the minor number) is allowed by PROP_AP_NAMES 804 * 805 * returns non-zero if we return a valid attachment point through <path> 806 */ 807 static int 808 pci_cfg_ap_legacy(di_minor_t minor, di_node_t node, di_prom_handle_t ph, 809 char *ap_path, int ap_pathsz) 810 { 811 minor_t pci_dev; 812 int *anp; 813 814 if (di_propall_lookup_ints(ph, 0, DDI_DEV_T_ANY, node, PROP_AP_NAMES, 815 &anp) < 1) 816 return (0); 817 818 pci_dev = PCIHP_AP_MINOR_NUM_TO_PCI_DEVNUM(di_minor_devt(minor)); 819 if ((*anp & (1 << pci_dev)) == 0) 820 return (0); 821 822 (void) strlcpy(ap_path, di_minor_name(minor), ap_pathsz); 823 return (1); 824 } 825 826 827 /* 828 * determine if <node> qualifies for a path style apid 829 */ 830 static int 831 pci_cfg_is_ap_path(di_node_t node, di_prom_handle_t ph) 832 { 833 char *devtype; 834 di_node_t curnode = node; 835 836 do { 837 if (di_propall_lookup_strings(ph, 0, DDI_DEV_T_ANY, curnode, 838 PROP_DEV_TYPE, &devtype) > 0) 839 if (strcmp(devtype, PROPVAL_PCIEX) == 0) 840 return (1); 841 } while ((curnode = di_parent_node(curnode)) != DI_NODE_NIL); 842 843 return (0); 844 } 845 846 847 /* 848 * takes a full path as returned by <pathret> from pci_cfg_ap_path() and 849 * returns an allocated string intendend to be stored in a devlink info (dli) 850 * file 851 * 852 * data format: "Location: <transformed path>" 853 * where <transformed path> is <path> with occurrances of AP_PATH_SEP 854 * replaced by "/" 855 */ 856 static char * 857 pci_cfg_info_data(char *path) 858 { 859 #define head "Location: " 860 #define headlen (sizeof (head) - 1) 861 #define seplen (sizeof (AP_PATH_SEP) - 1) 862 863 char *sep, *prev, *np; 864 char *newpath; 865 int pathlen = strlen(path); 866 int len; 867 868 newpath = malloc(sizeof (char) * (headlen + pathlen + 1)); 869 np = newpath; 870 (void) strcpy(np, head); 871 np += headlen; 872 873 prev = path; 874 while ((sep = strstr(prev, AP_PATH_SEP)) != NULL) { 875 len = sep - prev; 876 (void) memcpy(np, prev, len); 877 np += len; 878 *np++ = '/'; 879 prev = sep + seplen; 880 } 881 (void) strcpy(np, prev); 882 return (newpath); 883 884 #undef head 885 #undef headlen 886 #undef seplen 887 } 888 889 890 static void 891 pci_cfg_rm_link(char *file) 892 { 893 char *dlipath; 894 895 dlipath = di_dli_name(file); 896 (void) unlink(dlipath); 897 898 devfsadm_rm_all(file); 899 free(dlipath); 900 } 901 902 /* 903 * removes all registered devlinks to physical path <physpath> except for 904 * the devlink <valid> if not NULL; 905 * <physpath> must include the minor node 906 */ 907 static void 908 pci_cfg_rm_invalid_links(char *physpath, char *valid) 909 { 910 char **dnp; 911 char *cp, *vcp; 912 int i, dnlen; 913 914 dnp = devfsadm_lookup_dev_names(physpath, NULL, &dnlen); 915 if (dnp == NULL) 916 return; 917 918 if (valid != NULL) { 919 if (strncmp(valid, DEV "/", DEV_LEN + 1) == 0) 920 vcp = valid + DEV_LEN + 1; 921 else 922 vcp = valid; 923 } 924 925 for (i = 0; i < dnlen; i++) { 926 if (strncmp(dnp[i], DEV "/", DEV_LEN + 1) == 0) 927 cp = dnp[i] + DEV_LEN + 1; 928 else 929 cp = dnp[i]; 930 931 if (valid != NULL) { 932 if (strcmp(vcp, cp) == 0) 933 continue; 934 } 935 pci_cfg_rm_link(cp); 936 } 937 devfsadm_free_dev_names(dnp, dnlen); 938 } 939 940 941 /* 942 * takes a complete devinfo snapshot and returns the root node; 943 * callers must do a di_fini() on the returned node; 944 * if the snapshot failed, DI_NODE_NIL is returned instead 945 * 946 * if <pci_node> is not DI_NODE_NIL, it will search for the same devinfo node 947 * in the new snapshot and return it through <ret_node> if it is found, 948 * else DI_NODE_NIL is returned instead 949 * 950 * in addition, if <pci_minor> is not DI_MINOR_NIL, it will also return 951 * the matching minor in the new snapshot through <ret_minor> if it is found, 952 * else DI_MINOR_NIL is returned instead 953 */ 954 static di_node_t 955 pci_cfg_snapshot(di_node_t pci_node, di_minor_t pci_minor, 956 di_node_t *ret_node, di_minor_t *ret_minor) 957 { 958 di_node_t root_node; 959 di_node_t node; 960 di_minor_t minor; 961 int pci_inst; 962 dev_t pci_devt; 963 964 *ret_node = DI_NODE_NIL; 965 *ret_minor = DI_MINOR_NIL; 966 967 root_node = di_init("/", DINFOCPYALL); 968 if (root_node == DI_NODE_NIL) 969 return (DI_NODE_NIL); 970 971 /* 972 * narrow down search by driver, then instance, then minor 973 */ 974 if (pci_node == DI_NODE_NIL) 975 return (root_node); 976 977 pci_inst = di_instance(pci_node); 978 node = di_drv_first_node(di_driver_name(pci_node), root_node); 979 do { 980 if (pci_inst == di_instance(node)) { 981 *ret_node = node; 982 break; 983 } 984 } while ((node = di_drv_next_node(node)) != DI_NODE_NIL); 985 986 if (node == DI_NODE_NIL) 987 return (root_node); 988 989 /* 990 * found node, now search minors 991 */ 992 if (pci_minor == DI_MINOR_NIL) 993 return (root_node); 994 995 pci_devt = di_minor_devt(pci_minor); 996 minor = DI_MINOR_NIL; 997 while ((minor = di_minor_next(node, minor)) != DI_MINOR_NIL) { 998 if (pci_devt == di_minor_devt(minor)) { 999 *ret_minor = minor; 1000 break; 1001 } 1002 } 1003 return (root_node); 1004 } 1005 1006 1007 static int 1008 pci_cfg_creat_cb(di_minor_t pci_minor, di_node_t pci_node) 1009 { 1010 #ifdef DEBUG 1011 char *fnm = "pci_cfg_creat_cb"; 1012 #endif 1013 #define ap_pathsz (sizeof (ap_path)) 1014 1015 char ap_path[CFGA_LOG_EXT_LEN]; 1016 char linkbuf[MAXPATHLEN]; 1017 char *fullpath = NULL; 1018 char *pathinfo = NULL; 1019 char *devpath = NULL; 1020 int rv, fd; 1021 size_t sz; 1022 di_prom_handle_t ph; 1023 di_node_t node; 1024 di_node_t root_node = DI_NODE_NIL; 1025 di_minor_t minor; 1026 1027 ph = di_prom_init(); 1028 if (ph == DI_PROM_HANDLE_NIL) { 1029 dprint(("%s: di_prom_init() failed for %s%d\n", 1030 fnm, DRVINST(pci_node))); 1031 goto OUT; 1032 } 1033 1034 /* 1035 * Since incoming nodes from hotplug events are from snapshots that 1036 * do NOT contain parent/ancestor data, we must retake our own 1037 * snapshot and search for the target node 1038 */ 1039 root_node = pci_cfg_snapshot(pci_node, pci_minor, &node, &minor); 1040 if (root_node == DI_NODE_NIL || node == DI_NODE_NIL || 1041 minor == DI_MINOR_NIL) { 1042 dprint(("%s: devinfo snapshot or search failed for %s%d\n", 1043 fnm, DRVINST(pci_node))); 1044 goto OUT; 1045 } 1046 1047 if (pci_cfg_is_ap_path(node, ph)) { 1048 rv = pci_cfg_ap_path(minor, node, ph, ap_path, ap_pathsz, 1049 &fullpath); 1050 if (rv == 0) 1051 goto OUT; 1052 1053 (void) snprintf(linkbuf, sizeof (linkbuf), "%s/%s", 1054 CFG_DIRNAME, ap_path); 1055 1056 /* 1057 * We must remove existing links because we may have invalid 1058 * apids that are valid links. Since these are not dangling, 1059 * devfsadm will not invoke the remove callback on them. 1060 * 1061 * What are "invalid apids with valid links"? Consider swapping 1062 * an attachment point bus with another while the system is 1063 * down, on the same device path bound to the same drivers 1064 * but with the new AP bus having different properties 1065 * (e.g. serialid#). If the previous apid is not removed, 1066 * there will now be two different links pointing to the same 1067 * attachment point, but only one reflects the correct 1068 * logical apid 1069 */ 1070 devpath = pci_cfg_devpath(node, minor); 1071 if (devpath == NULL) 1072 goto OUT; 1073 pci_cfg_rm_invalid_links(devpath, linkbuf); 1074 free(devpath); 1075 1076 (void) devfsadm_mklink(linkbuf, node, minor, 0); 1077 1078 /* 1079 * we store the full logical path of the attachment point for 1080 * cfgadm to display in its info field which is useful when 1081 * the full logical path exceeds the size limit for logical 1082 * apids (CFGA_LOG_EXT_LEN) 1083 * 1084 * for the cfgadm pci plugin to do the same would be expensive 1085 * (i.e. devinfo snapshot + top down exhaustive minor search + 1086 * equivalent of pci_cfg_ap_path() on every invocation) 1087 * 1088 * note that if we do not create a link (pci_cfg_ap_path() is 1089 * not successful), that is what cfgadm will do anyways to 1090 * create a purely dynamic apid 1091 */ 1092 pathinfo = pci_cfg_info_data(fullpath); 1093 fd = di_dli_openw(linkbuf); 1094 if (fd < 0) 1095 goto OUT; 1096 1097 sz = strlen(pathinfo) + 1; 1098 rv = write(fd, pathinfo, sz); 1099 if (rv < sz) { 1100 dprint(("%s: could not write full pathinfo to dli " 1101 "file for %s%d\n", fnm, DRVINST(node))); 1102 goto OUT; 1103 } 1104 di_dli_close(fd); 1105 } else { 1106 rv = pci_cfg_ap_legacy(minor, node, ph, ap_path, 1107 ap_pathsz); 1108 if (rv == 0) 1109 goto OUT; 1110 1111 (void) snprintf(linkbuf, sizeof (linkbuf), "%s/%s", 1112 CFG_DIRNAME, ap_path); 1113 (void) devfsadm_mklink(linkbuf, node, minor, 0); 1114 } 1115 1116 OUT: 1117 if (fullpath != NULL) 1118 free(fullpath); 1119 if (pathinfo != NULL) 1120 free(pathinfo); 1121 if (ph != DI_PROM_HANDLE_NIL) 1122 di_prom_fini(ph); 1123 if (root_node != DI_NODE_NIL) 1124 di_fini(root_node); 1125 return (DEVFSADM_CONTINUE); 1126 1127 #undef ap_pathsz 1128 } 1129 1130 1131 static void 1132 pci_cfg_rm_all(char *file) 1133 { 1134 pci_cfg_rm_link(file); 1135 } 1136 1137 1138 /* 1139 * ib_cfg_creat_cb() creates two types of links 1140 * One for the fabric as /dev/cfg/ib 1141 * Another for each HCA seen in the fabric as /dev/cfg/hca:<HCA-GUID> 1142 */ 1143 static int 1144 ib_cfg_creat_cb(di_minor_t minor, di_node_t node) 1145 { 1146 char *cp; 1147 char path[PATH_MAX + 1]; 1148 1149 if ((cp = di_devfs_path(node)) == NULL) { 1150 return (DEVFSADM_CONTINUE); 1151 } 1152 1153 (void) snprintf(path, sizeof (path), "%s:%s", cp, di_minor_name(minor)); 1154 di_devfs_path_free(cp); 1155 1156 /* create fabric or hca:GUID and the symlink */ 1157 if (strstr(path, "ib:fabric") != NULL) { 1158 (void) snprintf(path, sizeof (path), "%s/ib", CFG_DIRNAME); 1159 } else { 1160 (void) snprintf(path, sizeof (path), "%s/hca:%s", CFG_DIRNAME, 1161 di_minor_name(minor)); 1162 } 1163 1164 (void) devfsadm_mklink(path, node, minor, 0); 1165 return (DEVFSADM_CONTINUE); 1166 } 1167