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 (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 25 */ 26 27 #include <sys/note.h> 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/buf.h> 32 #include <sys/uio.h> 33 #include <sys/cred.h> 34 #include <sys/poll.h> 35 #include <sys/mman.h> 36 #include <sys/kmem.h> 37 #include <sys/model.h> 38 #include <sys/file.h> 39 #include <sys/proc.h> 40 #include <sys/open.h> 41 #include <sys/user.h> 42 #include <sys/t_lock.h> 43 #include <sys/vm.h> 44 #include <sys/stat.h> 45 #include <vm/hat.h> 46 #include <vm/seg.h> 47 #include <vm/seg_vn.h> 48 #include <vm/seg_dev.h> 49 #include <vm/as.h> 50 #include <sys/cmn_err.h> 51 #include <sys/cpuvar.h> 52 #include <sys/debug.h> 53 #include <sys/autoconf.h> 54 #include <sys/sunddi.h> 55 #include <sys/esunddi.h> 56 #include <sys/sunndi.h> 57 #include <sys/kstat.h> 58 #include <sys/conf.h> 59 #include <sys/ddi_impldefs.h> /* include implementation structure defs */ 60 #include <sys/ndi_impldefs.h> /* include prototypes */ 61 #include <sys/ddi_periodic.h> 62 #include <sys/hwconf.h> 63 #include <sys/pathname.h> 64 #include <sys/modctl.h> 65 #include <sys/epm.h> 66 #include <sys/devctl.h> 67 #include <sys/callb.h> 68 #include <sys/cladm.h> 69 #include <sys/sysevent.h> 70 #include <sys/dacf_impl.h> 71 #include <sys/ddidevmap.h> 72 #include <sys/bootconf.h> 73 #include <sys/disp.h> 74 #include <sys/atomic.h> 75 #include <sys/promif.h> 76 #include <sys/instance.h> 77 #include <sys/sysevent/eventdefs.h> 78 #include <sys/task.h> 79 #include <sys/project.h> 80 #include <sys/taskq.h> 81 #include <sys/devpolicy.h> 82 #include <sys/ctype.h> 83 #include <net/if.h> 84 #include <sys/rctl.h> 85 #include <sys/zone.h> 86 #include <sys/clock_impl.h> 87 #include <sys/ddi.h> 88 #include <sys/modhash.h> 89 #include <sys/sunldi_impl.h> 90 #include <sys/fs/dv_node.h> 91 #include <sys/fs/snode.h> 92 93 extern pri_t minclsyspri; 94 95 extern rctl_hndl_t rc_project_locked_mem; 96 extern rctl_hndl_t rc_zone_locked_mem; 97 98 #ifdef DEBUG 99 static int sunddi_debug = 0; 100 #endif /* DEBUG */ 101 102 /* ddi_umem_unlock miscellaneous */ 103 104 static void i_ddi_umem_unlock_thread_start(void); 105 106 static kmutex_t ddi_umem_unlock_mutex; /* unlock list mutex */ 107 static kcondvar_t ddi_umem_unlock_cv; /* unlock list block/unblock */ 108 static kthread_t *ddi_umem_unlock_thread; 109 /* 110 * The ddi_umem_unlock FIFO list. NULL head pointer indicates empty list. 111 */ 112 static struct ddi_umem_cookie *ddi_umem_unlock_head = NULL; 113 static struct ddi_umem_cookie *ddi_umem_unlock_tail = NULL; 114 115 /* 116 * DDI(Sun) Function and flag definitions: 117 */ 118 119 #if defined(__x86) 120 /* 121 * Used to indicate which entries were chosen from a range. 122 */ 123 char *chosen_reg = "chosen-reg"; 124 #endif 125 126 /* 127 * Function used to ring system console bell 128 */ 129 void (*ddi_console_bell_func)(clock_t duration); 130 131 /* 132 * Creating register mappings and handling interrupts: 133 */ 134 135 /* 136 * Generic ddi_map: Call parent to fulfill request... 137 */ 138 139 int 140 ddi_map(dev_info_t *dp, ddi_map_req_t *mp, off_t offset, 141 off_t len, caddr_t *addrp) 142 { 143 dev_info_t *pdip; 144 145 ASSERT(dp); 146 pdip = (dev_info_t *)DEVI(dp)->devi_parent; 147 return ((DEVI(pdip)->devi_ops->devo_bus_ops->bus_map)(pdip, 148 dp, mp, offset, len, addrp)); 149 } 150 151 /* 152 * ddi_apply_range: (Called by nexi only.) 153 * Apply ranges in parent node dp, to child regspec rp... 154 */ 155 156 int 157 ddi_apply_range(dev_info_t *dp, dev_info_t *rdip, struct regspec *rp) 158 { 159 return (i_ddi_apply_range(dp, rdip, rp)); 160 } 161 162 int 163 ddi_map_regs(dev_info_t *dip, uint_t rnumber, caddr_t *kaddrp, off_t offset, 164 off_t len) 165 { 166 ddi_map_req_t mr; 167 #if defined(__x86) 168 struct { 169 int bus; 170 int addr; 171 int size; 172 } reg, *reglist; 173 uint_t length; 174 int rc; 175 176 /* 177 * get the 'registers' or the 'reg' property. 178 * We look up the reg property as an array of 179 * int's. 180 */ 181 rc = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip, 182 DDI_PROP_DONTPASS, "registers", (int **)®list, &length); 183 if (rc != DDI_PROP_SUCCESS) 184 rc = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip, 185 DDI_PROP_DONTPASS, "reg", (int **)®list, &length); 186 if (rc == DDI_PROP_SUCCESS) { 187 /* 188 * point to the required entry. 189 */ 190 reg = reglist[rnumber]; 191 reg.addr += offset; 192 if (len != 0) 193 reg.size = len; 194 /* 195 * make a new property containing ONLY the required tuple. 196 */ 197 if (ddi_prop_update_int_array(DDI_DEV_T_NONE, dip, 198 chosen_reg, (int *)®, (sizeof (reg)/sizeof (int))) 199 != DDI_PROP_SUCCESS) { 200 cmn_err(CE_WARN, "%s%d: cannot create '%s' " 201 "property", DEVI(dip)->devi_name, 202 DEVI(dip)->devi_instance, chosen_reg); 203 } 204 /* 205 * free the memory allocated by 206 * ddi_prop_lookup_int_array (). 207 */ 208 ddi_prop_free((void *)reglist); 209 } 210 #endif 211 mr.map_op = DDI_MO_MAP_LOCKED; 212 mr.map_type = DDI_MT_RNUMBER; 213 mr.map_obj.rnumber = rnumber; 214 mr.map_prot = PROT_READ | PROT_WRITE; 215 mr.map_flags = DDI_MF_KERNEL_MAPPING; 216 mr.map_handlep = NULL; 217 mr.map_vers = DDI_MAP_VERSION; 218 219 /* 220 * Call my parent to map in my regs. 221 */ 222 223 return (ddi_map(dip, &mr, offset, len, kaddrp)); 224 } 225 226 void 227 ddi_unmap_regs(dev_info_t *dip, uint_t rnumber, caddr_t *kaddrp, off_t offset, 228 off_t len) 229 { 230 ddi_map_req_t mr; 231 232 mr.map_op = DDI_MO_UNMAP; 233 mr.map_type = DDI_MT_RNUMBER; 234 mr.map_flags = DDI_MF_KERNEL_MAPPING; 235 mr.map_prot = PROT_READ | PROT_WRITE; /* who cares? */ 236 mr.map_obj.rnumber = rnumber; 237 mr.map_handlep = NULL; 238 mr.map_vers = DDI_MAP_VERSION; 239 240 /* 241 * Call my parent to unmap my regs. 242 */ 243 244 (void) ddi_map(dip, &mr, offset, len, kaddrp); 245 *kaddrp = (caddr_t)0; 246 #if defined(__x86) 247 (void) ddi_prop_remove(DDI_DEV_T_NONE, dip, chosen_reg); 248 #endif 249 } 250 251 int 252 ddi_bus_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, 253 off_t offset, off_t len, caddr_t *vaddrp) 254 { 255 return (i_ddi_bus_map(dip, rdip, mp, offset, len, vaddrp)); 256 } 257 258 /* 259 * nullbusmap: The/DDI default bus_map entry point for nexi 260 * not conforming to the reg/range paradigm (i.e. scsi, etc.) 261 * with no HAT/MMU layer to be programmed at this level. 262 * 263 * If the call is to map by rnumber, return an error, 264 * otherwise pass anything else up the tree to my parent. 265 */ 266 int 267 nullbusmap(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, 268 off_t offset, off_t len, caddr_t *vaddrp) 269 { 270 _NOTE(ARGUNUSED(rdip)) 271 if (mp->map_type == DDI_MT_RNUMBER) 272 return (DDI_ME_UNSUPPORTED); 273 274 return (ddi_map(dip, mp, offset, len, vaddrp)); 275 } 276 277 /* 278 * ddi_rnumber_to_regspec: Not for use by leaf drivers. 279 * Only for use by nexi using the reg/range paradigm. 280 */ 281 struct regspec * 282 ddi_rnumber_to_regspec(dev_info_t *dip, int rnumber) 283 { 284 return (i_ddi_rnumber_to_regspec(dip, rnumber)); 285 } 286 287 288 /* 289 * Note that we allow the dip to be nil because we may be called 290 * prior even to the instantiation of the devinfo tree itself - all 291 * regular leaf and nexus drivers should always use a non-nil dip! 292 * 293 * We treat peek in a somewhat cavalier fashion .. assuming that we'll 294 * simply get a synchronous fault as soon as we touch a missing address. 295 * 296 * Poke is rather more carefully handled because we might poke to a write 297 * buffer, "succeed", then only find some time later that we got an 298 * asynchronous fault that indicated that the address we were writing to 299 * was not really backed by hardware. 300 */ 301 302 static int 303 i_ddi_peekpoke(dev_info_t *devi, ddi_ctl_enum_t cmd, size_t size, 304 void *addr, void *value_p) 305 { 306 union { 307 uint64_t u64; 308 uint32_t u32; 309 uint16_t u16; 310 uint8_t u8; 311 } peekpoke_value; 312 313 peekpoke_ctlops_t peekpoke_args; 314 uint64_t dummy_result; 315 int rval; 316 317 /* Note: size is assumed to be correct; it is not checked. */ 318 peekpoke_args.size = size; 319 peekpoke_args.dev_addr = (uintptr_t)addr; 320 peekpoke_args.handle = NULL; 321 peekpoke_args.repcount = 1; 322 peekpoke_args.flags = 0; 323 324 if (cmd == DDI_CTLOPS_POKE) { 325 switch (size) { 326 case sizeof (uint8_t): 327 peekpoke_value.u8 = *(uint8_t *)value_p; 328 break; 329 case sizeof (uint16_t): 330 peekpoke_value.u16 = *(uint16_t *)value_p; 331 break; 332 case sizeof (uint32_t): 333 peekpoke_value.u32 = *(uint32_t *)value_p; 334 break; 335 case sizeof (uint64_t): 336 peekpoke_value.u64 = *(uint64_t *)value_p; 337 break; 338 } 339 } 340 341 peekpoke_args.host_addr = (uintptr_t)&peekpoke_value.u64; 342 343 if (devi != NULL) 344 rval = ddi_ctlops(devi, devi, cmd, &peekpoke_args, 345 &dummy_result); 346 else 347 rval = peekpoke_mem(cmd, &peekpoke_args); 348 349 /* 350 * A NULL value_p is permitted by ddi_peek(9F); discard the result. 351 */ 352 if ((cmd == DDI_CTLOPS_PEEK) & (value_p != NULL)) { 353 switch (size) { 354 case sizeof (uint8_t): 355 *(uint8_t *)value_p = peekpoke_value.u8; 356 break; 357 case sizeof (uint16_t): 358 *(uint16_t *)value_p = peekpoke_value.u16; 359 break; 360 case sizeof (uint32_t): 361 *(uint32_t *)value_p = peekpoke_value.u32; 362 break; 363 case sizeof (uint64_t): 364 *(uint64_t *)value_p = peekpoke_value.u64; 365 break; 366 } 367 } 368 369 return (rval); 370 } 371 372 /* 373 * Keep ddi_peek() and ddi_poke() in case 3rd parties are calling this. 374 * they shouldn't be, but the 9f manpage kind of pseudo exposes it. 375 */ 376 int 377 ddi_peek(dev_info_t *devi, size_t size, void *addr, void *value_p) 378 { 379 switch (size) { 380 case sizeof (uint8_t): 381 case sizeof (uint16_t): 382 case sizeof (uint32_t): 383 case sizeof (uint64_t): 384 break; 385 default: 386 return (DDI_FAILURE); 387 } 388 389 return (i_ddi_peekpoke(devi, DDI_CTLOPS_PEEK, size, addr, value_p)); 390 } 391 392 int 393 ddi_poke(dev_info_t *devi, size_t size, void *addr, void *value_p) 394 { 395 switch (size) { 396 case sizeof (uint8_t): 397 case sizeof (uint16_t): 398 case sizeof (uint32_t): 399 case sizeof (uint64_t): 400 break; 401 default: 402 return (DDI_FAILURE); 403 } 404 405 return (i_ddi_peekpoke(devi, DDI_CTLOPS_POKE, size, addr, value_p)); 406 } 407 408 int 409 ddi_peek8(dev_info_t *dip, int8_t *addr, int8_t *val_p) 410 { 411 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 412 val_p)); 413 } 414 415 int 416 ddi_peek16(dev_info_t *dip, int16_t *addr, int16_t *val_p) 417 { 418 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 419 val_p)); 420 } 421 422 int 423 ddi_peek32(dev_info_t *dip, int32_t *addr, int32_t *val_p) 424 { 425 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 426 val_p)); 427 } 428 429 int 430 ddi_peek64(dev_info_t *dip, int64_t *addr, int64_t *val_p) 431 { 432 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 433 val_p)); 434 } 435 436 437 /* 438 * We need to separate the old interfaces from the new ones and leave them 439 * in here for a while. Previous versions of the OS defined the new interfaces 440 * to the old interfaces. This way we can fix things up so that we can 441 * eventually remove these interfaces. 442 * e.g. A 3rd party module/driver using ddi_peek8 and built against S10 443 * or earlier will actually have a reference to ddi_peekc in the binary. 444 */ 445 #ifdef _ILP32 446 int 447 ddi_peekc(dev_info_t *dip, int8_t *addr, int8_t *val_p) 448 { 449 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 450 val_p)); 451 } 452 453 int 454 ddi_peeks(dev_info_t *dip, int16_t *addr, int16_t *val_p) 455 { 456 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 457 val_p)); 458 } 459 460 int 461 ddi_peekl(dev_info_t *dip, int32_t *addr, int32_t *val_p) 462 { 463 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 464 val_p)); 465 } 466 467 int 468 ddi_peekd(dev_info_t *dip, int64_t *addr, int64_t *val_p) 469 { 470 return (i_ddi_peekpoke(dip, DDI_CTLOPS_PEEK, sizeof (*val_p), addr, 471 val_p)); 472 } 473 #endif /* _ILP32 */ 474 475 int 476 ddi_poke8(dev_info_t *dip, int8_t *addr, int8_t val) 477 { 478 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 479 } 480 481 int 482 ddi_poke16(dev_info_t *dip, int16_t *addr, int16_t val) 483 { 484 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 485 } 486 487 int 488 ddi_poke32(dev_info_t *dip, int32_t *addr, int32_t val) 489 { 490 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 491 } 492 493 int 494 ddi_poke64(dev_info_t *dip, int64_t *addr, int64_t val) 495 { 496 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 497 } 498 499 /* 500 * We need to separate the old interfaces from the new ones and leave them 501 * in here for a while. Previous versions of the OS defined the new interfaces 502 * to the old interfaces. This way we can fix things up so that we can 503 * eventually remove these interfaces. 504 * e.g. A 3rd party module/driver using ddi_poke8 and built against S10 505 * or earlier will actually have a reference to ddi_pokec in the binary. 506 */ 507 #ifdef _ILP32 508 int 509 ddi_pokec(dev_info_t *dip, int8_t *addr, int8_t val) 510 { 511 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 512 } 513 514 int 515 ddi_pokes(dev_info_t *dip, int16_t *addr, int16_t val) 516 { 517 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 518 } 519 520 int 521 ddi_pokel(dev_info_t *dip, int32_t *addr, int32_t val) 522 { 523 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 524 } 525 526 int 527 ddi_poked(dev_info_t *dip, int64_t *addr, int64_t val) 528 { 529 return (i_ddi_peekpoke(dip, DDI_CTLOPS_POKE, sizeof (val), addr, &val)); 530 } 531 #endif /* _ILP32 */ 532 533 /* 534 * ddi_peekpokeio() is used primarily by the mem drivers for moving 535 * data to and from uio structures via peek and poke. Note that we 536 * use "internal" routines ddi_peek and ddi_poke to make this go 537 * slightly faster, avoiding the call overhead .. 538 */ 539 int 540 ddi_peekpokeio(dev_info_t *devi, struct uio *uio, enum uio_rw rw, 541 caddr_t addr, size_t len, uint_t xfersize) 542 { 543 int64_t ibuffer; 544 int8_t w8; 545 size_t sz; 546 int o; 547 548 if (xfersize > sizeof (long)) 549 xfersize = sizeof (long); 550 551 while (len != 0) { 552 if ((len | (uintptr_t)addr) & 1) { 553 sz = sizeof (int8_t); 554 if (rw == UIO_WRITE) { 555 if ((o = uwritec(uio)) == -1) 556 return (DDI_FAILURE); 557 if (ddi_poke8(devi, (int8_t *)addr, 558 (int8_t)o) != DDI_SUCCESS) 559 return (DDI_FAILURE); 560 } else { 561 if (i_ddi_peekpoke(devi, DDI_CTLOPS_PEEK, sz, 562 (int8_t *)addr, &w8) != DDI_SUCCESS) 563 return (DDI_FAILURE); 564 if (ureadc(w8, uio)) 565 return (DDI_FAILURE); 566 } 567 } else { 568 switch (xfersize) { 569 case sizeof (int64_t): 570 if (((len | (uintptr_t)addr) & 571 (sizeof (int64_t) - 1)) == 0) { 572 sz = xfersize; 573 break; 574 } 575 /*FALLTHROUGH*/ 576 case sizeof (int32_t): 577 if (((len | (uintptr_t)addr) & 578 (sizeof (int32_t) - 1)) == 0) { 579 sz = xfersize; 580 break; 581 } 582 /*FALLTHROUGH*/ 583 default: 584 /* 585 * This still assumes that we might have an 586 * I/O bus out there that permits 16-bit 587 * transfers (and that it would be upset by 588 * 32-bit transfers from such locations). 589 */ 590 sz = sizeof (int16_t); 591 break; 592 } 593 594 if (rw == UIO_READ) { 595 if (i_ddi_peekpoke(devi, DDI_CTLOPS_PEEK, sz, 596 addr, &ibuffer) != DDI_SUCCESS) 597 return (DDI_FAILURE); 598 } 599 600 if (uiomove(&ibuffer, sz, rw, uio)) 601 return (DDI_FAILURE); 602 603 if (rw == UIO_WRITE) { 604 if (i_ddi_peekpoke(devi, DDI_CTLOPS_POKE, sz, 605 addr, &ibuffer) != DDI_SUCCESS) 606 return (DDI_FAILURE); 607 } 608 } 609 addr += sz; 610 len -= sz; 611 } 612 return (DDI_SUCCESS); 613 } 614 615 /* 616 * These routines are used by drivers that do layered ioctls 617 * On sparc, they're implemented in assembler to avoid spilling 618 * register windows in the common (copyin) case .. 619 */ 620 #if !defined(__sparc) 621 int 622 ddi_copyin(const void *buf, void *kernbuf, size_t size, int flags) 623 { 624 if (flags & FKIOCTL) 625 return (kcopy(buf, kernbuf, size) ? -1 : 0); 626 return (copyin(buf, kernbuf, size)); 627 } 628 629 int 630 ddi_copyout(const void *buf, void *kernbuf, size_t size, int flags) 631 { 632 if (flags & FKIOCTL) 633 return (kcopy(buf, kernbuf, size) ? -1 : 0); 634 return (copyout(buf, kernbuf, size)); 635 } 636 #endif /* !__sparc */ 637 638 /* 639 * Conversions in nexus pagesize units. We don't duplicate the 640 * 'nil dip' semantics of peek/poke because btopr/btop/ptob are DDI/DKI 641 * routines anyway. 642 */ 643 unsigned long 644 ddi_btop(dev_info_t *dip, unsigned long bytes) 645 { 646 unsigned long pages; 647 648 (void) ddi_ctlops(dip, dip, DDI_CTLOPS_BTOP, &bytes, &pages); 649 return (pages); 650 } 651 652 unsigned long 653 ddi_btopr(dev_info_t *dip, unsigned long bytes) 654 { 655 unsigned long pages; 656 657 (void) ddi_ctlops(dip, dip, DDI_CTLOPS_BTOPR, &bytes, &pages); 658 return (pages); 659 } 660 661 unsigned long 662 ddi_ptob(dev_info_t *dip, unsigned long pages) 663 { 664 unsigned long bytes; 665 666 (void) ddi_ctlops(dip, dip, DDI_CTLOPS_PTOB, &pages, &bytes); 667 return (bytes); 668 } 669 670 unsigned int 671 ddi_enter_critical(void) 672 { 673 return ((uint_t)spl7()); 674 } 675 676 void 677 ddi_exit_critical(unsigned int spl) 678 { 679 splx((int)spl); 680 } 681 682 /* 683 * Nexus ctlops punter 684 */ 685 686 #if !defined(__sparc) 687 /* 688 * Request bus_ctl parent to handle a bus_ctl request 689 * 690 * (The sparc version is in sparc_ddi.s) 691 */ 692 int 693 ddi_ctlops(dev_info_t *d, dev_info_t *r, ddi_ctl_enum_t op, void *a, void *v) 694 { 695 int (*fp)(); 696 697 if (!d || !r) 698 return (DDI_FAILURE); 699 700 if ((d = (dev_info_t *)DEVI(d)->devi_bus_ctl) == NULL) 701 return (DDI_FAILURE); 702 703 fp = DEVI(d)->devi_ops->devo_bus_ops->bus_ctl; 704 return ((*fp)(d, r, op, a, v)); 705 } 706 707 #endif 708 709 /* 710 * DMA/DVMA setup 711 */ 712 713 #if !defined(__sparc) 714 /* 715 * Request bus_dma_ctl parent to fiddle with a dma request. 716 * 717 * (The sparc version is in sparc_subr.s) 718 */ 719 int 720 ddi_dma_mctl(dev_info_t *dip, dev_info_t *rdip, 721 ddi_dma_handle_t handle, enum ddi_dma_ctlops request, 722 off_t *offp, size_t *lenp, caddr_t *objp, uint_t flags) 723 { 724 int (*fp)(); 725 726 if (dip != ddi_root_node()) 727 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_ctl; 728 fp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_ctl; 729 return ((*fp) (dip, rdip, handle, request, offp, lenp, objp, flags)); 730 } 731 #endif 732 733 /* 734 * For all DMA control functions, call the DMA control 735 * routine and return status. 736 * 737 * Just plain assume that the parent is to be called. 738 * If a nexus driver or a thread outside the framework 739 * of a nexus driver or a leaf driver calls these functions, 740 * it is up to them to deal with the fact that the parent's 741 * bus_dma_ctl function will be the first one called. 742 */ 743 744 #define HD ((ddi_dma_impl_t *)h)->dmai_rdip 745 746 /* 747 * This routine is left in place to satisfy link dependencies 748 * for any 3rd party nexus drivers that rely on it. It is never 749 * called, though. 750 */ 751 /*ARGSUSED*/ 752 int 753 ddi_dma_map(dev_info_t *dip, dev_info_t *rdip, 754 struct ddi_dma_req *dmareqp, ddi_dma_handle_t *handlep) 755 { 756 return (DDI_FAILURE); 757 } 758 759 #if !defined(__sparc) 760 761 /* 762 * The SPARC versions of these routines are done in assembler to 763 * save register windows, so they're in sparc_subr.s. 764 */ 765 766 int 767 ddi_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *attr, 768 int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep) 769 { 770 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_attr_t *, 771 int (*)(caddr_t), caddr_t, ddi_dma_handle_t *); 772 773 if (dip != ddi_root_node()) 774 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_allochdl; 775 776 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_allochdl; 777 return ((*funcp)(dip, rdip, attr, waitfp, arg, handlep)); 778 } 779 780 int 781 ddi_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handlep) 782 { 783 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t); 784 785 if (dip != ddi_root_node()) 786 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_allochdl; 787 788 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_freehdl; 789 return ((*funcp)(dip, rdip, handlep)); 790 } 791 792 int 793 ddi_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 794 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 795 ddi_dma_cookie_t *cp, uint_t *ccountp) 796 { 797 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t, 798 struct ddi_dma_req *, ddi_dma_cookie_t *, uint_t *); 799 800 if (dip != ddi_root_node()) 801 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_bindhdl; 802 803 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_bindhdl; 804 return ((*funcp)(dip, rdip, handle, dmareq, cp, ccountp)); 805 } 806 807 int 808 ddi_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 809 ddi_dma_handle_t handle) 810 { 811 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t); 812 813 if (dip != ddi_root_node()) 814 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_unbindhdl; 815 816 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_unbindhdl; 817 return ((*funcp)(dip, rdip, handle)); 818 } 819 820 821 int 822 ddi_dma_flush(dev_info_t *dip, dev_info_t *rdip, 823 ddi_dma_handle_t handle, off_t off, size_t len, 824 uint_t cache_flags) 825 { 826 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t, 827 off_t, size_t, uint_t); 828 829 if (dip != ddi_root_node()) 830 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_flush; 831 832 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_flush; 833 return ((*funcp)(dip, rdip, handle, off, len, cache_flags)); 834 } 835 836 int 837 ddi_dma_win(dev_info_t *dip, dev_info_t *rdip, 838 ddi_dma_handle_t handle, uint_t win, off_t *offp, 839 size_t *lenp, ddi_dma_cookie_t *cookiep, uint_t *ccountp) 840 { 841 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t, 842 uint_t, off_t *, size_t *, ddi_dma_cookie_t *, uint_t *); 843 844 if (dip != ddi_root_node()) 845 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_win; 846 847 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_win; 848 return ((*funcp)(dip, rdip, handle, win, offp, lenp, 849 cookiep, ccountp)); 850 } 851 852 int 853 ddi_dma_sync(ddi_dma_handle_t h, off_t o, size_t l, uint_t whom) 854 { 855 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)h; 856 dev_info_t *dip, *rdip; 857 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t, off_t, 858 size_t, uint_t); 859 860 /* 861 * the DMA nexus driver will set DMP_NOSYNC if the 862 * platform does not require any sync operation. For 863 * example if the memory is uncached or consistent 864 * and without any I/O write buffers involved. 865 */ 866 if ((hp->dmai_rflags & DMP_NOSYNC) == DMP_NOSYNC) 867 return (DDI_SUCCESS); 868 869 dip = rdip = hp->dmai_rdip; 870 if (dip != ddi_root_node()) 871 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_flush; 872 funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_flush; 873 return ((*funcp)(dip, rdip, h, o, l, whom)); 874 } 875 876 int 877 ddi_dma_unbind_handle(ddi_dma_handle_t h) 878 { 879 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)h; 880 dev_info_t *dip, *rdip; 881 int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t); 882 883 dip = rdip = hp->dmai_rdip; 884 if (dip != ddi_root_node()) 885 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_unbindhdl; 886 funcp = DEVI(rdip)->devi_bus_dma_unbindfunc; 887 return ((*funcp)(dip, rdip, h)); 888 } 889 890 #endif /* !__sparc */ 891 892 /* 893 * DMA burst sizes, and transfer minimums 894 */ 895 896 int 897 ddi_dma_burstsizes(ddi_dma_handle_t handle) 898 { 899 ddi_dma_impl_t *dimp = (ddi_dma_impl_t *)handle; 900 901 if (!dimp) 902 return (0); 903 else 904 return (dimp->dmai_burstsizes); 905 } 906 907 /* 908 * Given two DMA attribute structures, apply the attributes 909 * of one to the other, following the rules of attributes 910 * and the wishes of the caller. 911 * 912 * The rules of DMA attribute structures are that you cannot 913 * make things *less* restrictive as you apply one set 914 * of attributes to another. 915 * 916 */ 917 void 918 ddi_dma_attr_merge(ddi_dma_attr_t *attr, ddi_dma_attr_t *mod) 919 { 920 attr->dma_attr_addr_lo = 921 MAX(attr->dma_attr_addr_lo, mod->dma_attr_addr_lo); 922 attr->dma_attr_addr_hi = 923 MIN(attr->dma_attr_addr_hi, mod->dma_attr_addr_hi); 924 attr->dma_attr_count_max = 925 MIN(attr->dma_attr_count_max, mod->dma_attr_count_max); 926 attr->dma_attr_align = 927 MAX(attr->dma_attr_align, mod->dma_attr_align); 928 attr->dma_attr_burstsizes = 929 (uint_t)(attr->dma_attr_burstsizes & mod->dma_attr_burstsizes); 930 attr->dma_attr_minxfer = 931 maxbit(attr->dma_attr_minxfer, mod->dma_attr_minxfer); 932 attr->dma_attr_maxxfer = 933 MIN(attr->dma_attr_maxxfer, mod->dma_attr_maxxfer); 934 attr->dma_attr_seg = MIN(attr->dma_attr_seg, mod->dma_attr_seg); 935 attr->dma_attr_sgllen = MIN((uint_t)attr->dma_attr_sgllen, 936 (uint_t)mod->dma_attr_sgllen); 937 attr->dma_attr_granular = 938 MAX(attr->dma_attr_granular, mod->dma_attr_granular); 939 } 940 941 /* 942 * mmap/segmap interface: 943 */ 944 945 /* 946 * ddi_segmap: setup the default segment driver. Calls the drivers 947 * XXmmap routine to validate the range to be mapped. 948 * Return ENXIO of the range is not valid. Create 949 * a seg_dev segment that contains all of the 950 * necessary information and will reference the 951 * default segment driver routines. It returns zero 952 * on success or non-zero on failure. 953 */ 954 int 955 ddi_segmap(dev_t dev, off_t offset, struct as *asp, caddr_t *addrp, off_t len, 956 uint_t prot, uint_t maxprot, uint_t flags, cred_t *credp) 957 { 958 extern int spec_segmap(dev_t, off_t, struct as *, caddr_t *, 959 off_t, uint_t, uint_t, uint_t, struct cred *); 960 961 return (spec_segmap(dev, offset, asp, addrp, len, 962 prot, maxprot, flags, credp)); 963 } 964 965 /* 966 * ddi_map_fault: Resolve mappings at fault time. Used by segment 967 * drivers. Allows each successive parent to resolve 968 * address translations and add its mappings to the 969 * mapping list supplied in the page structure. It 970 * returns zero on success or non-zero on failure. 971 */ 972 973 int 974 ddi_map_fault(dev_info_t *dip, struct hat *hat, struct seg *seg, 975 caddr_t addr, struct devpage *dp, pfn_t pfn, uint_t prot, uint_t lock) 976 { 977 return (i_ddi_map_fault(dip, dip, hat, seg, addr, dp, pfn, prot, lock)); 978 } 979 980 /* 981 * ddi_device_mapping_check: Called from ddi_segmap_setup. 982 * Invokes platform specific DDI to determine whether attributes specified 983 * in attr(9s) are valid for the region of memory that will be made 984 * available for direct access to user process via the mmap(2) system call. 985 */ 986 int 987 ddi_device_mapping_check(dev_t dev, ddi_device_acc_attr_t *accattrp, 988 uint_t rnumber, uint_t *hat_flags) 989 { 990 ddi_acc_handle_t handle; 991 ddi_map_req_t mr; 992 ddi_acc_hdl_t *hp; 993 int result; 994 dev_info_t *dip; 995 996 /* 997 * we use e_ddi_hold_devi_by_dev to search for the devi. We 998 * release it immediately since it should already be held by 999 * a devfs vnode. 1000 */ 1001 if ((dip = 1002 e_ddi_hold_devi_by_dev(dev, E_DDI_HOLD_DEVI_NOATTACH)) == NULL) 1003 return (-1); 1004 ddi_release_devi(dip); /* for e_ddi_hold_devi_by_dev() */ 1005 1006 /* 1007 * Allocate and initialize the common elements of data 1008 * access handle. 1009 */ 1010 handle = impl_acc_hdl_alloc(KM_SLEEP, NULL); 1011 if (handle == NULL) 1012 return (-1); 1013 1014 hp = impl_acc_hdl_get(handle); 1015 hp->ah_vers = VERS_ACCHDL; 1016 hp->ah_dip = dip; 1017 hp->ah_rnumber = rnumber; 1018 hp->ah_offset = 0; 1019 hp->ah_len = 0; 1020 hp->ah_acc = *accattrp; 1021 1022 /* 1023 * Set up the mapping request and call to parent. 1024 */ 1025 mr.map_op = DDI_MO_MAP_HANDLE; 1026 mr.map_type = DDI_MT_RNUMBER; 1027 mr.map_obj.rnumber = rnumber; 1028 mr.map_prot = PROT_READ | PROT_WRITE; 1029 mr.map_flags = DDI_MF_KERNEL_MAPPING; 1030 mr.map_handlep = hp; 1031 mr.map_vers = DDI_MAP_VERSION; 1032 result = ddi_map(dip, &mr, 0, 0, NULL); 1033 1034 /* 1035 * Region must be mappable, pick up flags from the framework. 1036 */ 1037 *hat_flags = hp->ah_hat_flags; 1038 1039 impl_acc_hdl_free(handle); 1040 1041 /* 1042 * check for end result. 1043 */ 1044 if (result != DDI_SUCCESS) 1045 return (-1); 1046 return (0); 1047 } 1048 1049 1050 /* 1051 * Property functions: See also, ddipropdefs.h. 1052 * 1053 * These functions are the framework for the property functions, 1054 * i.e. they support software defined properties. All implementation 1055 * specific property handling (i.e.: self-identifying devices and 1056 * PROM defined properties are handled in the implementation specific 1057 * functions (defined in ddi_implfuncs.h). 1058 */ 1059 1060 /* 1061 * nopropop: Shouldn't be called, right? 1062 */ 1063 int 1064 nopropop(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int mod_flags, 1065 char *name, caddr_t valuep, int *lengthp) 1066 { 1067 _NOTE(ARGUNUSED(dev, dip, prop_op, mod_flags, name, valuep, lengthp)) 1068 return (DDI_PROP_NOT_FOUND); 1069 } 1070 1071 #ifdef DDI_PROP_DEBUG 1072 int ddi_prop_debug_flag = 0; 1073 1074 int 1075 ddi_prop_debug(int enable) 1076 { 1077 int prev = ddi_prop_debug_flag; 1078 1079 if ((enable != 0) || (prev != 0)) 1080 printf("ddi_prop_debug: debugging %s\n", 1081 enable ? "enabled" : "disabled"); 1082 ddi_prop_debug_flag = enable; 1083 return (prev); 1084 } 1085 1086 #endif /* DDI_PROP_DEBUG */ 1087 1088 /* 1089 * Search a property list for a match, if found return pointer 1090 * to matching prop struct, else return NULL. 1091 */ 1092 1093 ddi_prop_t * 1094 i_ddi_prop_search(dev_t dev, char *name, uint_t flags, ddi_prop_t **list_head) 1095 { 1096 ddi_prop_t *propp; 1097 1098 /* 1099 * find the property in child's devinfo: 1100 * Search order defined by this search function is first matching 1101 * property with input dev == DDI_DEV_T_ANY matching any dev or 1102 * dev == propp->prop_dev, name == propp->name, and the correct 1103 * data type as specified in the flags. If a DDI_DEV_T_NONE dev 1104 * value made it this far then it implies a DDI_DEV_T_ANY search. 1105 */ 1106 if (dev == DDI_DEV_T_NONE) 1107 dev = DDI_DEV_T_ANY; 1108 1109 for (propp = *list_head; propp != NULL; propp = propp->prop_next) { 1110 1111 if (!DDI_STRSAME(propp->prop_name, name)) 1112 continue; 1113 1114 if ((dev != DDI_DEV_T_ANY) && (propp->prop_dev != dev)) 1115 continue; 1116 1117 if (((propp->prop_flags & flags) & DDI_PROP_TYPE_MASK) == 0) 1118 continue; 1119 1120 return (propp); 1121 } 1122 1123 return ((ddi_prop_t *)0); 1124 } 1125 1126 /* 1127 * Search for property within devnames structures 1128 */ 1129 ddi_prop_t * 1130 i_ddi_search_global_prop(dev_t dev, char *name, uint_t flags) 1131 { 1132 major_t major; 1133 struct devnames *dnp; 1134 ddi_prop_t *propp; 1135 1136 /* 1137 * Valid dev_t value is needed to index into the 1138 * correct devnames entry, therefore a dev_t 1139 * value of DDI_DEV_T_ANY is not appropriate. 1140 */ 1141 ASSERT(dev != DDI_DEV_T_ANY); 1142 if (dev == DDI_DEV_T_ANY) { 1143 return ((ddi_prop_t *)0); 1144 } 1145 1146 major = getmajor(dev); 1147 dnp = &(devnamesp[major]); 1148 1149 if (dnp->dn_global_prop_ptr == NULL) 1150 return ((ddi_prop_t *)0); 1151 1152 LOCK_DEV_OPS(&dnp->dn_lock); 1153 1154 for (propp = dnp->dn_global_prop_ptr->prop_list; 1155 propp != NULL; 1156 propp = (ddi_prop_t *)propp->prop_next) { 1157 1158 if (!DDI_STRSAME(propp->prop_name, name)) 1159 continue; 1160 1161 if ((!(flags & DDI_PROP_ROOTNEX_GLOBAL)) && 1162 (!(flags & LDI_DEV_T_ANY)) && (propp->prop_dev != dev)) 1163 continue; 1164 1165 if (((propp->prop_flags & flags) & DDI_PROP_TYPE_MASK) == 0) 1166 continue; 1167 1168 /* Property found, return it */ 1169 UNLOCK_DEV_OPS(&dnp->dn_lock); 1170 return (propp); 1171 } 1172 1173 UNLOCK_DEV_OPS(&dnp->dn_lock); 1174 return ((ddi_prop_t *)0); 1175 } 1176 1177 static char prop_no_mem_msg[] = "can't allocate memory for ddi property <%s>"; 1178 1179 /* 1180 * ddi_prop_search_global: 1181 * Search the global property list within devnames 1182 * for the named property. Return the encoded value. 1183 */ 1184 static int 1185 i_ddi_prop_search_global(dev_t dev, uint_t flags, char *name, 1186 void *valuep, uint_t *lengthp) 1187 { 1188 ddi_prop_t *propp; 1189 caddr_t buffer; 1190 1191 propp = i_ddi_search_global_prop(dev, name, flags); 1192 1193 /* Property NOT found, bail */ 1194 if (propp == (ddi_prop_t *)0) 1195 return (DDI_PROP_NOT_FOUND); 1196 1197 if (propp->prop_flags & DDI_PROP_UNDEF_IT) 1198 return (DDI_PROP_UNDEFINED); 1199 1200 if ((buffer = kmem_alloc(propp->prop_len, 1201 (flags & DDI_PROP_CANSLEEP) ? KM_SLEEP : KM_NOSLEEP)) == NULL) { 1202 cmn_err(CE_CONT, prop_no_mem_msg, name); 1203 return (DDI_PROP_NO_MEMORY); 1204 } 1205 1206 /* 1207 * Return the encoded data 1208 */ 1209 *(caddr_t *)valuep = buffer; 1210 *lengthp = propp->prop_len; 1211 bcopy(propp->prop_val, buffer, propp->prop_len); 1212 1213 return (DDI_PROP_SUCCESS); 1214 } 1215 1216 /* 1217 * ddi_prop_search_common: Lookup and return the encoded value 1218 */ 1219 int 1220 ddi_prop_search_common(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 1221 uint_t flags, char *name, void *valuep, uint_t *lengthp) 1222 { 1223 ddi_prop_t *propp; 1224 int i; 1225 caddr_t buffer; 1226 caddr_t prealloc = NULL; 1227 int plength = 0; 1228 dev_info_t *pdip; 1229 int (*bop)(); 1230 1231 /*CONSTANTCONDITION*/ 1232 while (1) { 1233 1234 mutex_enter(&(DEVI(dip)->devi_lock)); 1235 1236 1237 /* 1238 * find the property in child's devinfo: 1239 * Search order is: 1240 * 1. driver defined properties 1241 * 2. system defined properties 1242 * 3. driver global properties 1243 * 4. boot defined properties 1244 */ 1245 1246 propp = i_ddi_prop_search(dev, name, flags, 1247 &(DEVI(dip)->devi_drv_prop_ptr)); 1248 if (propp == NULL) { 1249 propp = i_ddi_prop_search(dev, name, flags, 1250 &(DEVI(dip)->devi_sys_prop_ptr)); 1251 } 1252 if ((propp == NULL) && DEVI(dip)->devi_global_prop_list) { 1253 propp = i_ddi_prop_search(dev, name, flags, 1254 &DEVI(dip)->devi_global_prop_list->prop_list); 1255 } 1256 1257 if (propp == NULL) { 1258 propp = i_ddi_prop_search(dev, name, flags, 1259 &(DEVI(dip)->devi_hw_prop_ptr)); 1260 } 1261 1262 /* 1263 * Software property found? 1264 */ 1265 if (propp != (ddi_prop_t *)0) { 1266 1267 /* 1268 * If explicit undefine, return now. 1269 */ 1270 if (propp->prop_flags & DDI_PROP_UNDEF_IT) { 1271 mutex_exit(&(DEVI(dip)->devi_lock)); 1272 if (prealloc) 1273 kmem_free(prealloc, plength); 1274 return (DDI_PROP_UNDEFINED); 1275 } 1276 1277 /* 1278 * If we only want to know if it exists, return now 1279 */ 1280 if (prop_op == PROP_EXISTS) { 1281 mutex_exit(&(DEVI(dip)->devi_lock)); 1282 ASSERT(prealloc == NULL); 1283 return (DDI_PROP_SUCCESS); 1284 } 1285 1286 /* 1287 * If length only request or prop length == 0, 1288 * service request and return now. 1289 */ 1290 if ((prop_op == PROP_LEN) ||(propp->prop_len == 0)) { 1291 *lengthp = propp->prop_len; 1292 1293 /* 1294 * if prop_op is PROP_LEN_AND_VAL_ALLOC 1295 * that means prop_len is 0, so set valuep 1296 * also to NULL 1297 */ 1298 if (prop_op == PROP_LEN_AND_VAL_ALLOC) 1299 *(caddr_t *)valuep = NULL; 1300 1301 mutex_exit(&(DEVI(dip)->devi_lock)); 1302 if (prealloc) 1303 kmem_free(prealloc, plength); 1304 return (DDI_PROP_SUCCESS); 1305 } 1306 1307 /* 1308 * If LEN_AND_VAL_ALLOC and the request can sleep, 1309 * drop the mutex, allocate the buffer, and go 1310 * through the loop again. If we already allocated 1311 * the buffer, and the size of the property changed, 1312 * keep trying... 1313 */ 1314 if ((prop_op == PROP_LEN_AND_VAL_ALLOC) && 1315 (flags & DDI_PROP_CANSLEEP)) { 1316 if (prealloc && (propp->prop_len != plength)) { 1317 kmem_free(prealloc, plength); 1318 prealloc = NULL; 1319 } 1320 if (prealloc == NULL) { 1321 plength = propp->prop_len; 1322 mutex_exit(&(DEVI(dip)->devi_lock)); 1323 prealloc = kmem_alloc(plength, 1324 KM_SLEEP); 1325 continue; 1326 } 1327 } 1328 1329 /* 1330 * Allocate buffer, if required. Either way, 1331 * set `buffer' variable. 1332 */ 1333 i = *lengthp; /* Get callers length */ 1334 *lengthp = propp->prop_len; /* Set callers length */ 1335 1336 switch (prop_op) { 1337 1338 case PROP_LEN_AND_VAL_ALLOC: 1339 1340 if (prealloc == NULL) { 1341 buffer = kmem_alloc(propp->prop_len, 1342 KM_NOSLEEP); 1343 } else { 1344 buffer = prealloc; 1345 } 1346 1347 if (buffer == NULL) { 1348 mutex_exit(&(DEVI(dip)->devi_lock)); 1349 cmn_err(CE_CONT, prop_no_mem_msg, name); 1350 return (DDI_PROP_NO_MEMORY); 1351 } 1352 /* Set callers buf ptr */ 1353 *(caddr_t *)valuep = buffer; 1354 break; 1355 1356 case PROP_LEN_AND_VAL_BUF: 1357 1358 if (propp->prop_len > (i)) { 1359 mutex_exit(&(DEVI(dip)->devi_lock)); 1360 return (DDI_PROP_BUF_TOO_SMALL); 1361 } 1362 1363 buffer = valuep; /* Get callers buf ptr */ 1364 break; 1365 1366 default: 1367 break; 1368 } 1369 1370 /* 1371 * Do the copy. 1372 */ 1373 bcopy(propp->prop_val, buffer, propp->prop_len); 1374 mutex_exit(&(DEVI(dip)->devi_lock)); 1375 return (DDI_PROP_SUCCESS); 1376 } 1377 1378 mutex_exit(&(DEVI(dip)->devi_lock)); 1379 if (prealloc) 1380 kmem_free(prealloc, plength); 1381 prealloc = NULL; 1382 1383 /* 1384 * Prop not found, call parent bus_ops to deal with possible 1385 * h/w layer (possible PROM defined props, etc.) and to 1386 * possibly ascend the hierarchy, if allowed by flags. 1387 */ 1388 pdip = (dev_info_t *)DEVI(dip)->devi_parent; 1389 1390 /* 1391 * One last call for the root driver PROM props? 1392 */ 1393 if (dip == ddi_root_node()) { 1394 return (ddi_bus_prop_op(dev, dip, dip, prop_op, 1395 flags, name, valuep, (int *)lengthp)); 1396 } 1397 1398 /* 1399 * We may have been called to check for properties 1400 * within a single devinfo node that has no parent - 1401 * see make_prop() 1402 */ 1403 if (pdip == NULL) { 1404 ASSERT((flags & 1405 (DDI_PROP_DONTPASS | DDI_PROP_NOTPROM)) == 1406 (DDI_PROP_DONTPASS | DDI_PROP_NOTPROM)); 1407 return (DDI_PROP_NOT_FOUND); 1408 } 1409 1410 /* 1411 * Instead of recursing, we do iterative calls up the tree. 1412 * As a bit of optimization, skip the bus_op level if the 1413 * node is a s/w node and if the parent's bus_prop_op function 1414 * is `ddi_bus_prop_op', because we know that in this case, 1415 * this function does nothing. 1416 * 1417 * 4225415: If the parent isn't attached, or the child 1418 * hasn't been named by the parent yet, use the default 1419 * ddi_bus_prop_op as a proxy for the parent. This 1420 * allows property lookups in any child/parent state to 1421 * include 'prom' and inherited properties, even when 1422 * there are no drivers attached to the child or parent. 1423 */ 1424 1425 bop = ddi_bus_prop_op; 1426 if (i_ddi_devi_attached(pdip) && 1427 (i_ddi_node_state(dip) >= DS_INITIALIZED)) 1428 bop = DEVI(pdip)->devi_ops->devo_bus_ops->bus_prop_op; 1429 1430 i = DDI_PROP_NOT_FOUND; 1431 1432 if ((bop != ddi_bus_prop_op) || ndi_dev_is_prom_node(dip)) { 1433 i = (*bop)(dev, pdip, dip, prop_op, 1434 flags | DDI_PROP_DONTPASS, 1435 name, valuep, lengthp); 1436 } 1437 1438 if ((flags & DDI_PROP_DONTPASS) || 1439 (i != DDI_PROP_NOT_FOUND)) 1440 return (i); 1441 1442 dip = pdip; 1443 } 1444 /*NOTREACHED*/ 1445 } 1446 1447 1448 /* 1449 * ddi_prop_op: The basic property operator for drivers. 1450 * 1451 * In ddi_prop_op, the type of valuep is interpreted based on prop_op: 1452 * 1453 * prop_op valuep 1454 * ------ ------ 1455 * 1456 * PROP_LEN <unused> 1457 * 1458 * PROP_LEN_AND_VAL_BUF Pointer to callers buffer 1459 * 1460 * PROP_LEN_AND_VAL_ALLOC Address of callers pointer (will be set to 1461 * address of allocated buffer, if successful) 1462 */ 1463 int 1464 ddi_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int mod_flags, 1465 char *name, caddr_t valuep, int *lengthp) 1466 { 1467 int i; 1468 1469 ASSERT((mod_flags & DDI_PROP_TYPE_MASK) == 0); 1470 1471 /* 1472 * If this was originally an LDI prop lookup then we bail here. 1473 * The reason is that the LDI property lookup interfaces first call 1474 * a drivers prop_op() entry point to allow it to override 1475 * properties. But if we've made it here, then the driver hasn't 1476 * overriden any properties. We don't want to continue with the 1477 * property search here because we don't have any type inforamtion. 1478 * When we return failure, the LDI interfaces will then proceed to 1479 * call the typed property interfaces to look up the property. 1480 */ 1481 if (mod_flags & DDI_PROP_DYNAMIC) 1482 return (DDI_PROP_NOT_FOUND); 1483 1484 /* 1485 * check for pre-typed property consumer asking for typed property: 1486 * see e_ddi_getprop_int64. 1487 */ 1488 if (mod_flags & DDI_PROP_CONSUMER_TYPED) 1489 mod_flags |= DDI_PROP_TYPE_INT64; 1490 mod_flags |= DDI_PROP_TYPE_ANY; 1491 1492 i = ddi_prop_search_common(dev, dip, prop_op, 1493 mod_flags, name, valuep, (uint_t *)lengthp); 1494 if (i == DDI_PROP_FOUND_1275) 1495 return (DDI_PROP_SUCCESS); 1496 return (i); 1497 } 1498 1499 /* 1500 * ddi_prop_op_nblocks_blksize: The basic property operator for drivers that 1501 * maintain size in number of blksize blocks. Provides a dynamic property 1502 * implementation for size oriented properties based on nblocks64 and blksize 1503 * values passed in by the driver. Fallback to ddi_prop_op if the nblocks64 1504 * is too large. This interface should not be used with a nblocks64 that 1505 * represents the driver's idea of how to represent unknown, if nblocks is 1506 * unknown use ddi_prop_op. 1507 */ 1508 int 1509 ddi_prop_op_nblocks_blksize(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 1510 int mod_flags, char *name, caddr_t valuep, int *lengthp, 1511 uint64_t nblocks64, uint_t blksize) 1512 { 1513 uint64_t size64; 1514 int blkshift; 1515 1516 /* convert block size to shift value */ 1517 ASSERT(BIT_ONLYONESET(blksize)); 1518 blkshift = highbit(blksize) - 1; 1519 1520 /* 1521 * There is no point in supporting nblocks64 values that don't have 1522 * an accurate uint64_t byte count representation. 1523 */ 1524 if (nblocks64 >= (UINT64_MAX >> blkshift)) 1525 return (ddi_prop_op(dev, dip, prop_op, mod_flags, 1526 name, valuep, lengthp)); 1527 1528 size64 = nblocks64 << blkshift; 1529 return (ddi_prop_op_size_blksize(dev, dip, prop_op, mod_flags, 1530 name, valuep, lengthp, size64, blksize)); 1531 } 1532 1533 /* 1534 * ddi_prop_op_nblocks: ddi_prop_op_nblocks_blksize with DEV_BSIZE blksize. 1535 */ 1536 int 1537 ddi_prop_op_nblocks(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 1538 int mod_flags, char *name, caddr_t valuep, int *lengthp, uint64_t nblocks64) 1539 { 1540 return (ddi_prop_op_nblocks_blksize(dev, dip, prop_op, 1541 mod_flags, name, valuep, lengthp, nblocks64, DEV_BSIZE)); 1542 } 1543 1544 /* 1545 * ddi_prop_op_size_blksize: The basic property operator for block drivers that 1546 * maintain size in bytes. Provides a of dynamic property implementation for 1547 * size oriented properties based on size64 value and blksize passed in by the 1548 * driver. Fallback to ddi_prop_op if the size64 is too large. This interface 1549 * should not be used with a size64 that represents the driver's idea of how 1550 * to represent unknown, if size is unknown use ddi_prop_op. 1551 * 1552 * NOTE: the legacy "nblocks"/"size" properties are treated as 32-bit unsigned 1553 * integers. While the most likely interface to request them ([bc]devi_size) 1554 * is declared int (signed) there is no enforcement of this, which means we 1555 * can't enforce limitations here without risking regression. 1556 */ 1557 int 1558 ddi_prop_op_size_blksize(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 1559 int mod_flags, char *name, caddr_t valuep, int *lengthp, uint64_t size64, 1560 uint_t blksize) 1561 { 1562 uint64_t nblocks64; 1563 int callers_length; 1564 caddr_t buffer; 1565 int blkshift; 1566 1567 /* 1568 * This is a kludge to support capture of size(9P) pure dynamic 1569 * properties in snapshots for non-cmlb code (without exposing 1570 * i_ddi_prop_dyn changes). When everyone uses cmlb, this code 1571 * should be removed. 1572 */ 1573 if (i_ddi_prop_dyn_driver_get(dip) == NULL) { 1574 static i_ddi_prop_dyn_t prop_dyn_size[] = { 1575 {"Size", DDI_PROP_TYPE_INT64, S_IFCHR}, 1576 {"Nblocks", DDI_PROP_TYPE_INT64, S_IFBLK}, 1577 {NULL} 1578 }; 1579 i_ddi_prop_dyn_driver_set(dip, prop_dyn_size); 1580 } 1581 1582 /* convert block size to shift value */ 1583 ASSERT(BIT_ONLYONESET(blksize)); 1584 blkshift = highbit(blksize) - 1; 1585 1586 /* compute DEV_BSIZE nblocks value */ 1587 nblocks64 = size64 >> blkshift; 1588 1589 /* get callers length, establish length of our dynamic properties */ 1590 callers_length = *lengthp; 1591 1592 if (strcmp(name, "Nblocks") == 0) 1593 *lengthp = sizeof (uint64_t); 1594 else if (strcmp(name, "Size") == 0) 1595 *lengthp = sizeof (uint64_t); 1596 else if ((strcmp(name, "nblocks") == 0) && (nblocks64 < UINT_MAX)) 1597 *lengthp = sizeof (uint32_t); 1598 else if ((strcmp(name, "size") == 0) && (size64 < UINT_MAX)) 1599 *lengthp = sizeof (uint32_t); 1600 else if ((strcmp(name, "blksize") == 0) && (blksize < UINT_MAX)) 1601 *lengthp = sizeof (uint32_t); 1602 else { 1603 /* fallback to ddi_prop_op */ 1604 return (ddi_prop_op(dev, dip, prop_op, mod_flags, 1605 name, valuep, lengthp)); 1606 } 1607 1608 /* service request for the length of the property */ 1609 if (prop_op == PROP_LEN) 1610 return (DDI_PROP_SUCCESS); 1611 1612 switch (prop_op) { 1613 case PROP_LEN_AND_VAL_ALLOC: 1614 if ((buffer = kmem_alloc(*lengthp, 1615 (mod_flags & DDI_PROP_CANSLEEP) ? 1616 KM_SLEEP : KM_NOSLEEP)) == NULL) 1617 return (DDI_PROP_NO_MEMORY); 1618 1619 *(caddr_t *)valuep = buffer; /* set callers buf ptr */ 1620 break; 1621 1622 case PROP_LEN_AND_VAL_BUF: 1623 /* the length of the property and the request must match */ 1624 if (callers_length != *lengthp) 1625 return (DDI_PROP_INVAL_ARG); 1626 1627 buffer = valuep; /* get callers buf ptr */ 1628 break; 1629 1630 default: 1631 return (DDI_PROP_INVAL_ARG); 1632 } 1633 1634 /* transfer the value into the buffer */ 1635 if (strcmp(name, "Nblocks") == 0) 1636 *((uint64_t *)buffer) = nblocks64; 1637 else if (strcmp(name, "Size") == 0) 1638 *((uint64_t *)buffer) = size64; 1639 else if (strcmp(name, "nblocks") == 0) 1640 *((uint32_t *)buffer) = (uint32_t)nblocks64; 1641 else if (strcmp(name, "size") == 0) 1642 *((uint32_t *)buffer) = (uint32_t)size64; 1643 else if (strcmp(name, "blksize") == 0) 1644 *((uint32_t *)buffer) = (uint32_t)blksize; 1645 return (DDI_PROP_SUCCESS); 1646 } 1647 1648 /* 1649 * ddi_prop_op_size: ddi_prop_op_size_blksize with DEV_BSIZE block size. 1650 */ 1651 int 1652 ddi_prop_op_size(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 1653 int mod_flags, char *name, caddr_t valuep, int *lengthp, uint64_t size64) 1654 { 1655 return (ddi_prop_op_size_blksize(dev, dip, prop_op, 1656 mod_flags, name, valuep, lengthp, size64, DEV_BSIZE)); 1657 } 1658 1659 /* 1660 * Variable length props... 1661 */ 1662 1663 /* 1664 * ddi_getlongprop: Get variable length property len+val into a buffer 1665 * allocated by property provider via kmem_alloc. Requester 1666 * is responsible for freeing returned property via kmem_free. 1667 * 1668 * Arguments: 1669 * 1670 * dev_t: Input: dev_t of property. 1671 * dip: Input: dev_info_t pointer of child. 1672 * flags: Input: Possible flag modifiers are: 1673 * DDI_PROP_DONTPASS: Don't pass to parent if prop not found. 1674 * DDI_PROP_CANSLEEP: Memory allocation may sleep. 1675 * name: Input: name of property. 1676 * valuep: Output: Addr of callers buffer pointer. 1677 * lengthp:Output: *lengthp will contain prop length on exit. 1678 * 1679 * Possible Returns: 1680 * 1681 * DDI_PROP_SUCCESS: Prop found and returned. 1682 * DDI_PROP_NOT_FOUND: Prop not found 1683 * DDI_PROP_UNDEFINED: Prop explicitly undefined. 1684 * DDI_PROP_NO_MEMORY: Prop found, but unable to alloc mem. 1685 */ 1686 1687 int 1688 ddi_getlongprop(dev_t dev, dev_info_t *dip, int flags, 1689 char *name, caddr_t valuep, int *lengthp) 1690 { 1691 return (ddi_prop_op(dev, dip, PROP_LEN_AND_VAL_ALLOC, 1692 flags, name, valuep, lengthp)); 1693 } 1694 1695 /* 1696 * 1697 * ddi_getlongprop_buf: Get long prop into pre-allocated callers 1698 * buffer. (no memory allocation by provider). 1699 * 1700 * dev_t: Input: dev_t of property. 1701 * dip: Input: dev_info_t pointer of child. 1702 * flags: Input: DDI_PROP_DONTPASS or NULL 1703 * name: Input: name of property 1704 * valuep: Input: ptr to callers buffer. 1705 * lengthp:I/O: ptr to length of callers buffer on entry, 1706 * actual length of property on exit. 1707 * 1708 * Possible returns: 1709 * 1710 * DDI_PROP_SUCCESS Prop found and returned 1711 * DDI_PROP_NOT_FOUND Prop not found 1712 * DDI_PROP_UNDEFINED Prop explicitly undefined. 1713 * DDI_PROP_BUF_TOO_SMALL Prop found, callers buf too small, 1714 * no value returned, but actual prop 1715 * length returned in *lengthp 1716 * 1717 */ 1718 1719 int 1720 ddi_getlongprop_buf(dev_t dev, dev_info_t *dip, int flags, 1721 char *name, caddr_t valuep, int *lengthp) 1722 { 1723 return (ddi_prop_op(dev, dip, PROP_LEN_AND_VAL_BUF, 1724 flags, name, valuep, lengthp)); 1725 } 1726 1727 /* 1728 * Integer/boolean sized props. 1729 * 1730 * Call is value only... returns found boolean or int sized prop value or 1731 * defvalue if prop not found or is wrong length or is explicitly undefined. 1732 * Only flag is DDI_PROP_DONTPASS... 1733 * 1734 * By convention, this interface returns boolean (0) sized properties 1735 * as value (int)1. 1736 * 1737 * This never returns an error, if property not found or specifically 1738 * undefined, the input `defvalue' is returned. 1739 */ 1740 1741 int 1742 ddi_getprop(dev_t dev, dev_info_t *dip, int flags, char *name, int defvalue) 1743 { 1744 int propvalue = defvalue; 1745 int proplength = sizeof (int); 1746 int error; 1747 1748 error = ddi_prop_op(dev, dip, PROP_LEN_AND_VAL_BUF, 1749 flags, name, (caddr_t)&propvalue, &proplength); 1750 1751 if ((error == DDI_PROP_SUCCESS) && (proplength == 0)) 1752 propvalue = 1; 1753 1754 return (propvalue); 1755 } 1756 1757 /* 1758 * Get prop length interface: flags are 0 or DDI_PROP_DONTPASS 1759 * if returns DDI_PROP_SUCCESS, length returned in *lengthp. 1760 */ 1761 1762 int 1763 ddi_getproplen(dev_t dev, dev_info_t *dip, int flags, char *name, int *lengthp) 1764 { 1765 return (ddi_prop_op(dev, dip, PROP_LEN, flags, name, NULL, lengthp)); 1766 } 1767 1768 /* 1769 * Allocate a struct prop_driver_data, along with 'size' bytes 1770 * for decoded property data. This structure is freed by 1771 * calling ddi_prop_free(9F). 1772 */ 1773 static void * 1774 ddi_prop_decode_alloc(size_t size, void (*prop_free)(struct prop_driver_data *)) 1775 { 1776 struct prop_driver_data *pdd; 1777 1778 /* 1779 * Allocate a structure with enough memory to store the decoded data. 1780 */ 1781 pdd = kmem_zalloc(sizeof (struct prop_driver_data) + size, KM_SLEEP); 1782 pdd->pdd_size = (sizeof (struct prop_driver_data) + size); 1783 pdd->pdd_prop_free = prop_free; 1784 1785 /* 1786 * Return a pointer to the location to put the decoded data. 1787 */ 1788 return ((void *)((caddr_t)pdd + sizeof (struct prop_driver_data))); 1789 } 1790 1791 /* 1792 * Allocated the memory needed to store the encoded data in the property 1793 * handle. 1794 */ 1795 static int 1796 ddi_prop_encode_alloc(prop_handle_t *ph, size_t size) 1797 { 1798 /* 1799 * If size is zero, then set data to NULL and size to 0. This 1800 * is a boolean property. 1801 */ 1802 if (size == 0) { 1803 ph->ph_size = 0; 1804 ph->ph_data = NULL; 1805 ph->ph_cur_pos = NULL; 1806 ph->ph_save_pos = NULL; 1807 } else { 1808 if (ph->ph_flags == DDI_PROP_DONTSLEEP) { 1809 ph->ph_data = kmem_zalloc(size, KM_NOSLEEP); 1810 if (ph->ph_data == NULL) 1811 return (DDI_PROP_NO_MEMORY); 1812 } else 1813 ph->ph_data = kmem_zalloc(size, KM_SLEEP); 1814 ph->ph_size = size; 1815 ph->ph_cur_pos = ph->ph_data; 1816 ph->ph_save_pos = ph->ph_data; 1817 } 1818 return (DDI_PROP_SUCCESS); 1819 } 1820 1821 /* 1822 * Free the space allocated by the lookup routines. Each lookup routine 1823 * returns a pointer to the decoded data to the driver. The driver then 1824 * passes this pointer back to us. This data actually lives in a struct 1825 * prop_driver_data. We use negative indexing to find the beginning of 1826 * the structure and then free the entire structure using the size and 1827 * the free routine stored in the structure. 1828 */ 1829 void 1830 ddi_prop_free(void *datap) 1831 { 1832 struct prop_driver_data *pdd; 1833 1834 /* 1835 * Get the structure 1836 */ 1837 pdd = (struct prop_driver_data *) 1838 ((caddr_t)datap - sizeof (struct prop_driver_data)); 1839 /* 1840 * Call the free routine to free it 1841 */ 1842 (*pdd->pdd_prop_free)(pdd); 1843 } 1844 1845 /* 1846 * Free the data associated with an array of ints, 1847 * allocated with ddi_prop_decode_alloc(). 1848 */ 1849 static void 1850 ddi_prop_free_ints(struct prop_driver_data *pdd) 1851 { 1852 kmem_free(pdd, pdd->pdd_size); 1853 } 1854 1855 /* 1856 * Free a single string property or a single string contained within 1857 * the argv style return value of an array of strings. 1858 */ 1859 static void 1860 ddi_prop_free_string(struct prop_driver_data *pdd) 1861 { 1862 kmem_free(pdd, pdd->pdd_size); 1863 1864 } 1865 1866 /* 1867 * Free an array of strings. 1868 */ 1869 static void 1870 ddi_prop_free_strings(struct prop_driver_data *pdd) 1871 { 1872 kmem_free(pdd, pdd->pdd_size); 1873 } 1874 1875 /* 1876 * Free the data associated with an array of bytes. 1877 */ 1878 static void 1879 ddi_prop_free_bytes(struct prop_driver_data *pdd) 1880 { 1881 kmem_free(pdd, pdd->pdd_size); 1882 } 1883 1884 /* 1885 * Reset the current location pointer in the property handle to the 1886 * beginning of the data. 1887 */ 1888 void 1889 ddi_prop_reset_pos(prop_handle_t *ph) 1890 { 1891 ph->ph_cur_pos = ph->ph_data; 1892 ph->ph_save_pos = ph->ph_data; 1893 } 1894 1895 /* 1896 * Restore the current location pointer in the property handle to the 1897 * saved position. 1898 */ 1899 void 1900 ddi_prop_save_pos(prop_handle_t *ph) 1901 { 1902 ph->ph_save_pos = ph->ph_cur_pos; 1903 } 1904 1905 /* 1906 * Save the location that the current location pointer is pointing to.. 1907 */ 1908 void 1909 ddi_prop_restore_pos(prop_handle_t *ph) 1910 { 1911 ph->ph_cur_pos = ph->ph_save_pos; 1912 } 1913 1914 /* 1915 * Property encode/decode functions 1916 */ 1917 1918 /* 1919 * Decode a single integer property 1920 */ 1921 static int 1922 ddi_prop_fm_decode_int(prop_handle_t *ph, void *data, uint_t *nelements) 1923 { 1924 int i; 1925 int tmp; 1926 1927 /* 1928 * If there is nothing to decode return an error 1929 */ 1930 if (ph->ph_size == 0) 1931 return (DDI_PROP_END_OF_DATA); 1932 1933 /* 1934 * Decode the property as a single integer and return it 1935 * in data if we were able to decode it. 1936 */ 1937 i = DDI_PROP_INT(ph, DDI_PROP_CMD_DECODE, &tmp); 1938 if (i < DDI_PROP_RESULT_OK) { 1939 switch (i) { 1940 case DDI_PROP_RESULT_EOF: 1941 return (DDI_PROP_END_OF_DATA); 1942 1943 case DDI_PROP_RESULT_ERROR: 1944 return (DDI_PROP_CANNOT_DECODE); 1945 } 1946 } 1947 1948 *(int *)data = tmp; 1949 *nelements = 1; 1950 return (DDI_PROP_SUCCESS); 1951 } 1952 1953 /* 1954 * Decode a single 64 bit integer property 1955 */ 1956 static int 1957 ddi_prop_fm_decode_int64(prop_handle_t *ph, void *data, uint_t *nelements) 1958 { 1959 int i; 1960 int64_t tmp; 1961 1962 /* 1963 * If there is nothing to decode return an error 1964 */ 1965 if (ph->ph_size == 0) 1966 return (DDI_PROP_END_OF_DATA); 1967 1968 /* 1969 * Decode the property as a single integer and return it 1970 * in data if we were able to decode it. 1971 */ 1972 i = DDI_PROP_INT64(ph, DDI_PROP_CMD_DECODE, &tmp); 1973 if (i < DDI_PROP_RESULT_OK) { 1974 switch (i) { 1975 case DDI_PROP_RESULT_EOF: 1976 return (DDI_PROP_END_OF_DATA); 1977 1978 case DDI_PROP_RESULT_ERROR: 1979 return (DDI_PROP_CANNOT_DECODE); 1980 } 1981 } 1982 1983 *(int64_t *)data = tmp; 1984 *nelements = 1; 1985 return (DDI_PROP_SUCCESS); 1986 } 1987 1988 /* 1989 * Decode an array of integers property 1990 */ 1991 static int 1992 ddi_prop_fm_decode_ints(prop_handle_t *ph, void *data, uint_t *nelements) 1993 { 1994 int i; 1995 int cnt = 0; 1996 int *tmp; 1997 int *intp; 1998 int n; 1999 2000 /* 2001 * Figure out how many array elements there are by going through the 2002 * data without decoding it first and counting. 2003 */ 2004 for (;;) { 2005 i = DDI_PROP_INT(ph, DDI_PROP_CMD_SKIP, NULL); 2006 if (i < 0) 2007 break; 2008 cnt++; 2009 } 2010 2011 /* 2012 * If there are no elements return an error 2013 */ 2014 if (cnt == 0) 2015 return (DDI_PROP_END_OF_DATA); 2016 2017 /* 2018 * If we cannot skip through the data, we cannot decode it 2019 */ 2020 if (i == DDI_PROP_RESULT_ERROR) 2021 return (DDI_PROP_CANNOT_DECODE); 2022 2023 /* 2024 * Reset the data pointer to the beginning of the encoded data 2025 */ 2026 ddi_prop_reset_pos(ph); 2027 2028 /* 2029 * Allocated memory to store the decoded value in. 2030 */ 2031 intp = ddi_prop_decode_alloc((cnt * sizeof (int)), 2032 ddi_prop_free_ints); 2033 2034 /* 2035 * Decode each element and place it in the space we just allocated 2036 */ 2037 tmp = intp; 2038 for (n = 0; n < cnt; n++, tmp++) { 2039 i = DDI_PROP_INT(ph, DDI_PROP_CMD_DECODE, tmp); 2040 if (i < DDI_PROP_RESULT_OK) { 2041 /* 2042 * Free the space we just allocated 2043 * and return an error. 2044 */ 2045 ddi_prop_free(intp); 2046 switch (i) { 2047 case DDI_PROP_RESULT_EOF: 2048 return (DDI_PROP_END_OF_DATA); 2049 2050 case DDI_PROP_RESULT_ERROR: 2051 return (DDI_PROP_CANNOT_DECODE); 2052 } 2053 } 2054 } 2055 2056 *nelements = cnt; 2057 *(int **)data = intp; 2058 2059 return (DDI_PROP_SUCCESS); 2060 } 2061 2062 /* 2063 * Decode a 64 bit integer array property 2064 */ 2065 static int 2066 ddi_prop_fm_decode_int64_array(prop_handle_t *ph, void *data, uint_t *nelements) 2067 { 2068 int i; 2069 int n; 2070 int cnt = 0; 2071 int64_t *tmp; 2072 int64_t *intp; 2073 2074 /* 2075 * Count the number of array elements by going 2076 * through the data without decoding it. 2077 */ 2078 for (;;) { 2079 i = DDI_PROP_INT64(ph, DDI_PROP_CMD_SKIP, NULL); 2080 if (i < 0) 2081 break; 2082 cnt++; 2083 } 2084 2085 /* 2086 * If there are no elements return an error 2087 */ 2088 if (cnt == 0) 2089 return (DDI_PROP_END_OF_DATA); 2090 2091 /* 2092 * If we cannot skip through the data, we cannot decode it 2093 */ 2094 if (i == DDI_PROP_RESULT_ERROR) 2095 return (DDI_PROP_CANNOT_DECODE); 2096 2097 /* 2098 * Reset the data pointer to the beginning of the encoded data 2099 */ 2100 ddi_prop_reset_pos(ph); 2101 2102 /* 2103 * Allocate memory to store the decoded value. 2104 */ 2105 intp = ddi_prop_decode_alloc((cnt * sizeof (int64_t)), 2106 ddi_prop_free_ints); 2107 2108 /* 2109 * Decode each element and place it in the space allocated 2110 */ 2111 tmp = intp; 2112 for (n = 0; n < cnt; n++, tmp++) { 2113 i = DDI_PROP_INT64(ph, DDI_PROP_CMD_DECODE, tmp); 2114 if (i < DDI_PROP_RESULT_OK) { 2115 /* 2116 * Free the space we just allocated 2117 * and return an error. 2118 */ 2119 ddi_prop_free(intp); 2120 switch (i) { 2121 case DDI_PROP_RESULT_EOF: 2122 return (DDI_PROP_END_OF_DATA); 2123 2124 case DDI_PROP_RESULT_ERROR: 2125 return (DDI_PROP_CANNOT_DECODE); 2126 } 2127 } 2128 } 2129 2130 *nelements = cnt; 2131 *(int64_t **)data = intp; 2132 2133 return (DDI_PROP_SUCCESS); 2134 } 2135 2136 /* 2137 * Encode an array of integers property (Can be one element) 2138 */ 2139 int 2140 ddi_prop_fm_encode_ints(prop_handle_t *ph, void *data, uint_t nelements) 2141 { 2142 int i; 2143 int *tmp; 2144 int cnt; 2145 int size; 2146 2147 /* 2148 * If there is no data, we cannot do anything 2149 */ 2150 if (nelements == 0) 2151 return (DDI_PROP_CANNOT_ENCODE); 2152 2153 /* 2154 * Get the size of an encoded int. 2155 */ 2156 size = DDI_PROP_INT(ph, DDI_PROP_CMD_GET_ESIZE, NULL); 2157 2158 if (size < DDI_PROP_RESULT_OK) { 2159 switch (size) { 2160 case DDI_PROP_RESULT_EOF: 2161 return (DDI_PROP_END_OF_DATA); 2162 2163 case DDI_PROP_RESULT_ERROR: 2164 return (DDI_PROP_CANNOT_ENCODE); 2165 } 2166 } 2167 2168 /* 2169 * Allocate space in the handle to store the encoded int. 2170 */ 2171 if (ddi_prop_encode_alloc(ph, size * nelements) != 2172 DDI_PROP_SUCCESS) 2173 return (DDI_PROP_NO_MEMORY); 2174 2175 /* 2176 * Encode the array of ints. 2177 */ 2178 tmp = (int *)data; 2179 for (cnt = 0; cnt < nelements; cnt++, tmp++) { 2180 i = DDI_PROP_INT(ph, DDI_PROP_CMD_ENCODE, tmp); 2181 if (i < DDI_PROP_RESULT_OK) { 2182 switch (i) { 2183 case DDI_PROP_RESULT_EOF: 2184 return (DDI_PROP_END_OF_DATA); 2185 2186 case DDI_PROP_RESULT_ERROR: 2187 return (DDI_PROP_CANNOT_ENCODE); 2188 } 2189 } 2190 } 2191 2192 return (DDI_PROP_SUCCESS); 2193 } 2194 2195 2196 /* 2197 * Encode a 64 bit integer array property 2198 */ 2199 int 2200 ddi_prop_fm_encode_int64(prop_handle_t *ph, void *data, uint_t nelements) 2201 { 2202 int i; 2203 int cnt; 2204 int size; 2205 int64_t *tmp; 2206 2207 /* 2208 * If there is no data, we cannot do anything 2209 */ 2210 if (nelements == 0) 2211 return (DDI_PROP_CANNOT_ENCODE); 2212 2213 /* 2214 * Get the size of an encoded 64 bit int. 2215 */ 2216 size = DDI_PROP_INT64(ph, DDI_PROP_CMD_GET_ESIZE, NULL); 2217 2218 if (size < DDI_PROP_RESULT_OK) { 2219 switch (size) { 2220 case DDI_PROP_RESULT_EOF: 2221 return (DDI_PROP_END_OF_DATA); 2222 2223 case DDI_PROP_RESULT_ERROR: 2224 return (DDI_PROP_CANNOT_ENCODE); 2225 } 2226 } 2227 2228 /* 2229 * Allocate space in the handle to store the encoded int. 2230 */ 2231 if (ddi_prop_encode_alloc(ph, size * nelements) != 2232 DDI_PROP_SUCCESS) 2233 return (DDI_PROP_NO_MEMORY); 2234 2235 /* 2236 * Encode the array of ints. 2237 */ 2238 tmp = (int64_t *)data; 2239 for (cnt = 0; cnt < nelements; cnt++, tmp++) { 2240 i = DDI_PROP_INT64(ph, DDI_PROP_CMD_ENCODE, tmp); 2241 if (i < DDI_PROP_RESULT_OK) { 2242 switch (i) { 2243 case DDI_PROP_RESULT_EOF: 2244 return (DDI_PROP_END_OF_DATA); 2245 2246 case DDI_PROP_RESULT_ERROR: 2247 return (DDI_PROP_CANNOT_ENCODE); 2248 } 2249 } 2250 } 2251 2252 return (DDI_PROP_SUCCESS); 2253 } 2254 2255 /* 2256 * Decode a single string property 2257 */ 2258 static int 2259 ddi_prop_fm_decode_string(prop_handle_t *ph, void *data, uint_t *nelements) 2260 { 2261 char *tmp; 2262 char *str; 2263 int i; 2264 int size; 2265 2266 /* 2267 * If there is nothing to decode return an error 2268 */ 2269 if (ph->ph_size == 0) 2270 return (DDI_PROP_END_OF_DATA); 2271 2272 /* 2273 * Get the decoded size of the encoded string. 2274 */ 2275 size = DDI_PROP_STR(ph, DDI_PROP_CMD_GET_DSIZE, NULL); 2276 if (size < DDI_PROP_RESULT_OK) { 2277 switch (size) { 2278 case DDI_PROP_RESULT_EOF: 2279 return (DDI_PROP_END_OF_DATA); 2280 2281 case DDI_PROP_RESULT_ERROR: 2282 return (DDI_PROP_CANNOT_DECODE); 2283 } 2284 } 2285 2286 /* 2287 * Allocated memory to store the decoded value in. 2288 */ 2289 str = ddi_prop_decode_alloc((size_t)size, ddi_prop_free_string); 2290 2291 ddi_prop_reset_pos(ph); 2292 2293 /* 2294 * Decode the str and place it in the space we just allocated 2295 */ 2296 tmp = str; 2297 i = DDI_PROP_STR(ph, DDI_PROP_CMD_DECODE, tmp); 2298 if (i < DDI_PROP_RESULT_OK) { 2299 /* 2300 * Free the space we just allocated 2301 * and return an error. 2302 */ 2303 ddi_prop_free(str); 2304 switch (i) { 2305 case DDI_PROP_RESULT_EOF: 2306 return (DDI_PROP_END_OF_DATA); 2307 2308 case DDI_PROP_RESULT_ERROR: 2309 return (DDI_PROP_CANNOT_DECODE); 2310 } 2311 } 2312 2313 *(char **)data = str; 2314 *nelements = 1; 2315 2316 return (DDI_PROP_SUCCESS); 2317 } 2318 2319 /* 2320 * Decode an array of strings. 2321 */ 2322 int 2323 ddi_prop_fm_decode_strings(prop_handle_t *ph, void *data, uint_t *nelements) 2324 { 2325 int cnt = 0; 2326 char **strs; 2327 char **tmp; 2328 char *ptr; 2329 int i; 2330 int n; 2331 int size; 2332 size_t nbytes; 2333 2334 /* 2335 * Figure out how many array elements there are by going through the 2336 * data without decoding it first and counting. 2337 */ 2338 for (;;) { 2339 i = DDI_PROP_STR(ph, DDI_PROP_CMD_SKIP, NULL); 2340 if (i < 0) 2341 break; 2342 cnt++; 2343 } 2344 2345 /* 2346 * If there are no elements return an error 2347 */ 2348 if (cnt == 0) 2349 return (DDI_PROP_END_OF_DATA); 2350 2351 /* 2352 * If we cannot skip through the data, we cannot decode it 2353 */ 2354 if (i == DDI_PROP_RESULT_ERROR) 2355 return (DDI_PROP_CANNOT_DECODE); 2356 2357 /* 2358 * Reset the data pointer to the beginning of the encoded data 2359 */ 2360 ddi_prop_reset_pos(ph); 2361 2362 /* 2363 * Figure out how much memory we need for the sum total 2364 */ 2365 nbytes = (cnt + 1) * sizeof (char *); 2366 2367 for (n = 0; n < cnt; n++) { 2368 /* 2369 * Get the decoded size of the current encoded string. 2370 */ 2371 size = DDI_PROP_STR(ph, DDI_PROP_CMD_GET_DSIZE, NULL); 2372 if (size < DDI_PROP_RESULT_OK) { 2373 switch (size) { 2374 case DDI_PROP_RESULT_EOF: 2375 return (DDI_PROP_END_OF_DATA); 2376 2377 case DDI_PROP_RESULT_ERROR: 2378 return (DDI_PROP_CANNOT_DECODE); 2379 } 2380 } 2381 2382 nbytes += size; 2383 } 2384 2385 /* 2386 * Allocate memory in which to store the decoded strings. 2387 */ 2388 strs = ddi_prop_decode_alloc(nbytes, ddi_prop_free_strings); 2389 2390 /* 2391 * Set up pointers for each string by figuring out yet 2392 * again how long each string is. 2393 */ 2394 ddi_prop_reset_pos(ph); 2395 ptr = (caddr_t)strs + ((cnt + 1) * sizeof (char *)); 2396 for (tmp = strs, n = 0; n < cnt; n++, tmp++) { 2397 /* 2398 * Get the decoded size of the current encoded string. 2399 */ 2400 size = DDI_PROP_STR(ph, DDI_PROP_CMD_GET_DSIZE, NULL); 2401 if (size < DDI_PROP_RESULT_OK) { 2402 ddi_prop_free(strs); 2403 switch (size) { 2404 case DDI_PROP_RESULT_EOF: 2405 return (DDI_PROP_END_OF_DATA); 2406 2407 case DDI_PROP_RESULT_ERROR: 2408 return (DDI_PROP_CANNOT_DECODE); 2409 } 2410 } 2411 2412 *tmp = ptr; 2413 ptr += size; 2414 } 2415 2416 /* 2417 * String array is terminated by a NULL 2418 */ 2419 *tmp = NULL; 2420 2421 /* 2422 * Finally, we can decode each string 2423 */ 2424 ddi_prop_reset_pos(ph); 2425 for (tmp = strs, n = 0; n < cnt; n++, tmp++) { 2426 i = DDI_PROP_STR(ph, DDI_PROP_CMD_DECODE, *tmp); 2427 if (i < DDI_PROP_RESULT_OK) { 2428 /* 2429 * Free the space we just allocated 2430 * and return an error 2431 */ 2432 ddi_prop_free(strs); 2433 switch (i) { 2434 case DDI_PROP_RESULT_EOF: 2435 return (DDI_PROP_END_OF_DATA); 2436 2437 case DDI_PROP_RESULT_ERROR: 2438 return (DDI_PROP_CANNOT_DECODE); 2439 } 2440 } 2441 } 2442 2443 *(char ***)data = strs; 2444 *nelements = cnt; 2445 2446 return (DDI_PROP_SUCCESS); 2447 } 2448 2449 /* 2450 * Encode a string. 2451 */ 2452 int 2453 ddi_prop_fm_encode_string(prop_handle_t *ph, void *data, uint_t nelements) 2454 { 2455 char **tmp; 2456 int size; 2457 int i; 2458 2459 /* 2460 * If there is no data, we cannot do anything 2461 */ 2462 if (nelements == 0) 2463 return (DDI_PROP_CANNOT_ENCODE); 2464 2465 /* 2466 * Get the size of the encoded string. 2467 */ 2468 tmp = (char **)data; 2469 size = DDI_PROP_STR(ph, DDI_PROP_CMD_GET_ESIZE, *tmp); 2470 if (size < DDI_PROP_RESULT_OK) { 2471 switch (size) { 2472 case DDI_PROP_RESULT_EOF: 2473 return (DDI_PROP_END_OF_DATA); 2474 2475 case DDI_PROP_RESULT_ERROR: 2476 return (DDI_PROP_CANNOT_ENCODE); 2477 } 2478 } 2479 2480 /* 2481 * Allocate space in the handle to store the encoded string. 2482 */ 2483 if (ddi_prop_encode_alloc(ph, size) != DDI_PROP_SUCCESS) 2484 return (DDI_PROP_NO_MEMORY); 2485 2486 ddi_prop_reset_pos(ph); 2487 2488 /* 2489 * Encode the string. 2490 */ 2491 tmp = (char **)data; 2492 i = DDI_PROP_STR(ph, DDI_PROP_CMD_ENCODE, *tmp); 2493 if (i < DDI_PROP_RESULT_OK) { 2494 switch (i) { 2495 case DDI_PROP_RESULT_EOF: 2496 return (DDI_PROP_END_OF_DATA); 2497 2498 case DDI_PROP_RESULT_ERROR: 2499 return (DDI_PROP_CANNOT_ENCODE); 2500 } 2501 } 2502 2503 return (DDI_PROP_SUCCESS); 2504 } 2505 2506 2507 /* 2508 * Encode an array of strings. 2509 */ 2510 int 2511 ddi_prop_fm_encode_strings(prop_handle_t *ph, void *data, uint_t nelements) 2512 { 2513 int cnt = 0; 2514 char **tmp; 2515 int size; 2516 uint_t total_size; 2517 int i; 2518 2519 /* 2520 * If there is no data, we cannot do anything 2521 */ 2522 if (nelements == 0) 2523 return (DDI_PROP_CANNOT_ENCODE); 2524 2525 /* 2526 * Get the total size required to encode all the strings. 2527 */ 2528 total_size = 0; 2529 tmp = (char **)data; 2530 for (cnt = 0; cnt < nelements; cnt++, tmp++) { 2531 size = DDI_PROP_STR(ph, DDI_PROP_CMD_GET_ESIZE, *tmp); 2532 if (size < DDI_PROP_RESULT_OK) { 2533 switch (size) { 2534 case DDI_PROP_RESULT_EOF: 2535 return (DDI_PROP_END_OF_DATA); 2536 2537 case DDI_PROP_RESULT_ERROR: 2538 return (DDI_PROP_CANNOT_ENCODE); 2539 } 2540 } 2541 total_size += (uint_t)size; 2542 } 2543 2544 /* 2545 * Allocate space in the handle to store the encoded strings. 2546 */ 2547 if (ddi_prop_encode_alloc(ph, total_size) != DDI_PROP_SUCCESS) 2548 return (DDI_PROP_NO_MEMORY); 2549 2550 ddi_prop_reset_pos(ph); 2551 2552 /* 2553 * Encode the array of strings. 2554 */ 2555 tmp = (char **)data; 2556 for (cnt = 0; cnt < nelements; cnt++, tmp++) { 2557 i = DDI_PROP_STR(ph, DDI_PROP_CMD_ENCODE, *tmp); 2558 if (i < DDI_PROP_RESULT_OK) { 2559 switch (i) { 2560 case DDI_PROP_RESULT_EOF: 2561 return (DDI_PROP_END_OF_DATA); 2562 2563 case DDI_PROP_RESULT_ERROR: 2564 return (DDI_PROP_CANNOT_ENCODE); 2565 } 2566 } 2567 } 2568 2569 return (DDI_PROP_SUCCESS); 2570 } 2571 2572 2573 /* 2574 * Decode an array of bytes. 2575 */ 2576 static int 2577 ddi_prop_fm_decode_bytes(prop_handle_t *ph, void *data, uint_t *nelements) 2578 { 2579 uchar_t *tmp; 2580 int nbytes; 2581 int i; 2582 2583 /* 2584 * If there are no elements return an error 2585 */ 2586 if (ph->ph_size == 0) 2587 return (DDI_PROP_END_OF_DATA); 2588 2589 /* 2590 * Get the size of the encoded array of bytes. 2591 */ 2592 nbytes = DDI_PROP_BYTES(ph, DDI_PROP_CMD_GET_DSIZE, 2593 data, ph->ph_size); 2594 if (nbytes < DDI_PROP_RESULT_OK) { 2595 switch (nbytes) { 2596 case DDI_PROP_RESULT_EOF: 2597 return (DDI_PROP_END_OF_DATA); 2598 2599 case DDI_PROP_RESULT_ERROR: 2600 return (DDI_PROP_CANNOT_DECODE); 2601 } 2602 } 2603 2604 /* 2605 * Allocated memory to store the decoded value in. 2606 */ 2607 tmp = ddi_prop_decode_alloc(nbytes, ddi_prop_free_bytes); 2608 2609 /* 2610 * Decode each element and place it in the space we just allocated 2611 */ 2612 i = DDI_PROP_BYTES(ph, DDI_PROP_CMD_DECODE, tmp, nbytes); 2613 if (i < DDI_PROP_RESULT_OK) { 2614 /* 2615 * Free the space we just allocated 2616 * and return an error 2617 */ 2618 ddi_prop_free(tmp); 2619 switch (i) { 2620 case DDI_PROP_RESULT_EOF: 2621 return (DDI_PROP_END_OF_DATA); 2622 2623 case DDI_PROP_RESULT_ERROR: 2624 return (DDI_PROP_CANNOT_DECODE); 2625 } 2626 } 2627 2628 *(uchar_t **)data = tmp; 2629 *nelements = nbytes; 2630 2631 return (DDI_PROP_SUCCESS); 2632 } 2633 2634 /* 2635 * Encode an array of bytes. 2636 */ 2637 int 2638 ddi_prop_fm_encode_bytes(prop_handle_t *ph, void *data, uint_t nelements) 2639 { 2640 int size; 2641 int i; 2642 2643 /* 2644 * If there are no elements, then this is a boolean property, 2645 * so just create a property handle with no data and return. 2646 */ 2647 if (nelements == 0) { 2648 (void) ddi_prop_encode_alloc(ph, 0); 2649 return (DDI_PROP_SUCCESS); 2650 } 2651 2652 /* 2653 * Get the size of the encoded array of bytes. 2654 */ 2655 size = DDI_PROP_BYTES(ph, DDI_PROP_CMD_GET_ESIZE, (uchar_t *)data, 2656 nelements); 2657 if (size < DDI_PROP_RESULT_OK) { 2658 switch (size) { 2659 case DDI_PROP_RESULT_EOF: 2660 return (DDI_PROP_END_OF_DATA); 2661 2662 case DDI_PROP_RESULT_ERROR: 2663 return (DDI_PROP_CANNOT_DECODE); 2664 } 2665 } 2666 2667 /* 2668 * Allocate space in the handle to store the encoded bytes. 2669 */ 2670 if (ddi_prop_encode_alloc(ph, (uint_t)size) != DDI_PROP_SUCCESS) 2671 return (DDI_PROP_NO_MEMORY); 2672 2673 /* 2674 * Encode the array of bytes. 2675 */ 2676 i = DDI_PROP_BYTES(ph, DDI_PROP_CMD_ENCODE, (uchar_t *)data, 2677 nelements); 2678 if (i < DDI_PROP_RESULT_OK) { 2679 switch (i) { 2680 case DDI_PROP_RESULT_EOF: 2681 return (DDI_PROP_END_OF_DATA); 2682 2683 case DDI_PROP_RESULT_ERROR: 2684 return (DDI_PROP_CANNOT_ENCODE); 2685 } 2686 } 2687 2688 return (DDI_PROP_SUCCESS); 2689 } 2690 2691 /* 2692 * OBP 1275 integer, string and byte operators. 2693 * 2694 * DDI_PROP_CMD_DECODE: 2695 * 2696 * DDI_PROP_RESULT_ERROR: cannot decode the data 2697 * DDI_PROP_RESULT_EOF: end of data 2698 * DDI_PROP_OK: data was decoded 2699 * 2700 * DDI_PROP_CMD_ENCODE: 2701 * 2702 * DDI_PROP_RESULT_ERROR: cannot encode the data 2703 * DDI_PROP_RESULT_EOF: end of data 2704 * DDI_PROP_OK: data was encoded 2705 * 2706 * DDI_PROP_CMD_SKIP: 2707 * 2708 * DDI_PROP_RESULT_ERROR: cannot skip the data 2709 * DDI_PROP_RESULT_EOF: end of data 2710 * DDI_PROP_OK: data was skipped 2711 * 2712 * DDI_PROP_CMD_GET_ESIZE: 2713 * 2714 * DDI_PROP_RESULT_ERROR: cannot get encoded size 2715 * DDI_PROP_RESULT_EOF: end of data 2716 * > 0: the encoded size 2717 * 2718 * DDI_PROP_CMD_GET_DSIZE: 2719 * 2720 * DDI_PROP_RESULT_ERROR: cannot get decoded size 2721 * DDI_PROP_RESULT_EOF: end of data 2722 * > 0: the decoded size 2723 */ 2724 2725 /* 2726 * OBP 1275 integer operator 2727 * 2728 * OBP properties are a byte stream of data, so integers may not be 2729 * properly aligned. Therefore we need to copy them one byte at a time. 2730 */ 2731 int 2732 ddi_prop_1275_int(prop_handle_t *ph, uint_t cmd, int *data) 2733 { 2734 int i; 2735 2736 switch (cmd) { 2737 case DDI_PROP_CMD_DECODE: 2738 /* 2739 * Check that there is encoded data 2740 */ 2741 if (ph->ph_cur_pos == NULL || ph->ph_size == 0) 2742 return (DDI_PROP_RESULT_ERROR); 2743 if (ph->ph_flags & PH_FROM_PROM) { 2744 i = MIN(ph->ph_size, PROP_1275_INT_SIZE); 2745 if ((int *)ph->ph_cur_pos > ((int *)ph->ph_data + 2746 ph->ph_size - i)) 2747 return (DDI_PROP_RESULT_ERROR); 2748 } else { 2749 if (ph->ph_size < sizeof (int) || 2750 ((int *)ph->ph_cur_pos > ((int *)ph->ph_data + 2751 ph->ph_size - sizeof (int)))) 2752 return (DDI_PROP_RESULT_ERROR); 2753 } 2754 2755 /* 2756 * Copy the integer, using the implementation-specific 2757 * copy function if the property is coming from the PROM. 2758 */ 2759 if (ph->ph_flags & PH_FROM_PROM) { 2760 *data = impl_ddi_prop_int_from_prom( 2761 (uchar_t *)ph->ph_cur_pos, 2762 (ph->ph_size < PROP_1275_INT_SIZE) ? 2763 ph->ph_size : PROP_1275_INT_SIZE); 2764 } else { 2765 bcopy(ph->ph_cur_pos, data, sizeof (int)); 2766 } 2767 2768 /* 2769 * Move the current location to the start of the next 2770 * bit of undecoded data. 2771 */ 2772 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + 2773 PROP_1275_INT_SIZE; 2774 return (DDI_PROP_RESULT_OK); 2775 2776 case DDI_PROP_CMD_ENCODE: 2777 /* 2778 * Check that there is room to encoded the data 2779 */ 2780 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 2781 ph->ph_size < PROP_1275_INT_SIZE || 2782 ((int *)ph->ph_cur_pos > ((int *)ph->ph_data + 2783 ph->ph_size - sizeof (int)))) 2784 return (DDI_PROP_RESULT_ERROR); 2785 2786 /* 2787 * Encode the integer into the byte stream one byte at a 2788 * time. 2789 */ 2790 bcopy(data, ph->ph_cur_pos, sizeof (int)); 2791 2792 /* 2793 * Move the current location to the start of the next bit of 2794 * space where we can store encoded data. 2795 */ 2796 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + PROP_1275_INT_SIZE; 2797 return (DDI_PROP_RESULT_OK); 2798 2799 case DDI_PROP_CMD_SKIP: 2800 /* 2801 * Check that there is encoded data 2802 */ 2803 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 2804 ph->ph_size < PROP_1275_INT_SIZE) 2805 return (DDI_PROP_RESULT_ERROR); 2806 2807 2808 if ((caddr_t)ph->ph_cur_pos == 2809 (caddr_t)ph->ph_data + ph->ph_size) { 2810 return (DDI_PROP_RESULT_EOF); 2811 } else if ((caddr_t)ph->ph_cur_pos > 2812 (caddr_t)ph->ph_data + ph->ph_size) { 2813 return (DDI_PROP_RESULT_EOF); 2814 } 2815 2816 /* 2817 * Move the current location to the start of the next bit of 2818 * undecoded data. 2819 */ 2820 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + PROP_1275_INT_SIZE; 2821 return (DDI_PROP_RESULT_OK); 2822 2823 case DDI_PROP_CMD_GET_ESIZE: 2824 /* 2825 * Return the size of an encoded integer on OBP 2826 */ 2827 return (PROP_1275_INT_SIZE); 2828 2829 case DDI_PROP_CMD_GET_DSIZE: 2830 /* 2831 * Return the size of a decoded integer on the system. 2832 */ 2833 return (sizeof (int)); 2834 2835 default: 2836 #ifdef DEBUG 2837 panic("ddi_prop_1275_int: %x impossible", cmd); 2838 /*NOTREACHED*/ 2839 #else 2840 return (DDI_PROP_RESULT_ERROR); 2841 #endif /* DEBUG */ 2842 } 2843 } 2844 2845 /* 2846 * 64 bit integer operator. 2847 * 2848 * This is an extension, defined by Sun, to the 1275 integer 2849 * operator. This routine handles the encoding/decoding of 2850 * 64 bit integer properties. 2851 */ 2852 int 2853 ddi_prop_int64_op(prop_handle_t *ph, uint_t cmd, int64_t *data) 2854 { 2855 2856 switch (cmd) { 2857 case DDI_PROP_CMD_DECODE: 2858 /* 2859 * Check that there is encoded data 2860 */ 2861 if (ph->ph_cur_pos == NULL || ph->ph_size == 0) 2862 return (DDI_PROP_RESULT_ERROR); 2863 if (ph->ph_flags & PH_FROM_PROM) { 2864 return (DDI_PROP_RESULT_ERROR); 2865 } else { 2866 if (ph->ph_size < sizeof (int64_t) || 2867 ((int64_t *)ph->ph_cur_pos > 2868 ((int64_t *)ph->ph_data + 2869 ph->ph_size - sizeof (int64_t)))) 2870 return (DDI_PROP_RESULT_ERROR); 2871 } 2872 /* 2873 * Copy the integer, using the implementation-specific 2874 * copy function if the property is coming from the PROM. 2875 */ 2876 if (ph->ph_flags & PH_FROM_PROM) { 2877 return (DDI_PROP_RESULT_ERROR); 2878 } else { 2879 bcopy(ph->ph_cur_pos, data, sizeof (int64_t)); 2880 } 2881 2882 /* 2883 * Move the current location to the start of the next 2884 * bit of undecoded data. 2885 */ 2886 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + 2887 sizeof (int64_t); 2888 return (DDI_PROP_RESULT_OK); 2889 2890 case DDI_PROP_CMD_ENCODE: 2891 /* 2892 * Check that there is room to encoded the data 2893 */ 2894 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 2895 ph->ph_size < sizeof (int64_t) || 2896 ((int64_t *)ph->ph_cur_pos > ((int64_t *)ph->ph_data + 2897 ph->ph_size - sizeof (int64_t)))) 2898 return (DDI_PROP_RESULT_ERROR); 2899 2900 /* 2901 * Encode the integer into the byte stream one byte at a 2902 * time. 2903 */ 2904 bcopy(data, ph->ph_cur_pos, sizeof (int64_t)); 2905 2906 /* 2907 * Move the current location to the start of the next bit of 2908 * space where we can store encoded data. 2909 */ 2910 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + 2911 sizeof (int64_t); 2912 return (DDI_PROP_RESULT_OK); 2913 2914 case DDI_PROP_CMD_SKIP: 2915 /* 2916 * Check that there is encoded data 2917 */ 2918 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 2919 ph->ph_size < sizeof (int64_t)) 2920 return (DDI_PROP_RESULT_ERROR); 2921 2922 if ((caddr_t)ph->ph_cur_pos == 2923 (caddr_t)ph->ph_data + ph->ph_size) { 2924 return (DDI_PROP_RESULT_EOF); 2925 } else if ((caddr_t)ph->ph_cur_pos > 2926 (caddr_t)ph->ph_data + ph->ph_size) { 2927 return (DDI_PROP_RESULT_EOF); 2928 } 2929 2930 /* 2931 * Move the current location to the start of 2932 * the next bit of undecoded data. 2933 */ 2934 ph->ph_cur_pos = (uchar_t *)ph->ph_cur_pos + 2935 sizeof (int64_t); 2936 return (DDI_PROP_RESULT_OK); 2937 2938 case DDI_PROP_CMD_GET_ESIZE: 2939 /* 2940 * Return the size of an encoded integer on OBP 2941 */ 2942 return (sizeof (int64_t)); 2943 2944 case DDI_PROP_CMD_GET_DSIZE: 2945 /* 2946 * Return the size of a decoded integer on the system. 2947 */ 2948 return (sizeof (int64_t)); 2949 2950 default: 2951 #ifdef DEBUG 2952 panic("ddi_prop_int64_op: %x impossible", cmd); 2953 /*NOTREACHED*/ 2954 #else 2955 return (DDI_PROP_RESULT_ERROR); 2956 #endif /* DEBUG */ 2957 } 2958 } 2959 2960 /* 2961 * OBP 1275 string operator. 2962 * 2963 * OBP strings are NULL terminated. 2964 */ 2965 int 2966 ddi_prop_1275_string(prop_handle_t *ph, uint_t cmd, char *data) 2967 { 2968 int n; 2969 char *p; 2970 char *end; 2971 2972 switch (cmd) { 2973 case DDI_PROP_CMD_DECODE: 2974 /* 2975 * Check that there is encoded data 2976 */ 2977 if (ph->ph_cur_pos == NULL || ph->ph_size == 0) { 2978 return (DDI_PROP_RESULT_ERROR); 2979 } 2980 2981 /* 2982 * Match DDI_PROP_CMD_GET_DSIZE logic for when to stop and 2983 * how to NULL terminate result. 2984 */ 2985 p = (char *)ph->ph_cur_pos; 2986 end = (char *)ph->ph_data + ph->ph_size; 2987 if (p >= end) 2988 return (DDI_PROP_RESULT_EOF); 2989 2990 while (p < end) { 2991 *data++ = *p; 2992 if (*p++ == 0) { /* NULL from OBP */ 2993 ph->ph_cur_pos = p; 2994 return (DDI_PROP_RESULT_OK); 2995 } 2996 } 2997 2998 /* 2999 * If OBP did not NULL terminate string, which happens 3000 * (at least) for 'true'/'false' boolean values, account for 3001 * the space and store null termination on decode. 3002 */ 3003 ph->ph_cur_pos = p; 3004 *data = 0; 3005 return (DDI_PROP_RESULT_OK); 3006 3007 case DDI_PROP_CMD_ENCODE: 3008 /* 3009 * Check that there is room to encoded the data 3010 */ 3011 if (ph->ph_cur_pos == NULL || ph->ph_size == 0) { 3012 return (DDI_PROP_RESULT_ERROR); 3013 } 3014 3015 n = strlen(data) + 1; 3016 if ((char *)ph->ph_cur_pos > ((char *)ph->ph_data + 3017 ph->ph_size - n)) { 3018 return (DDI_PROP_RESULT_ERROR); 3019 } 3020 3021 /* 3022 * Copy the NULL terminated string 3023 */ 3024 bcopy(data, ph->ph_cur_pos, n); 3025 3026 /* 3027 * Move the current location to the start of the next bit of 3028 * space where we can store encoded data. 3029 */ 3030 ph->ph_cur_pos = (char *)ph->ph_cur_pos + n; 3031 return (DDI_PROP_RESULT_OK); 3032 3033 case DDI_PROP_CMD_SKIP: 3034 /* 3035 * Check that there is encoded data 3036 */ 3037 if (ph->ph_cur_pos == NULL || ph->ph_size == 0) { 3038 return (DDI_PROP_RESULT_ERROR); 3039 } 3040 3041 /* 3042 * Return the string length plus one for the NULL 3043 * We know the size of the property, we need to 3044 * ensure that the string is properly formatted, 3045 * since we may be looking up random OBP data. 3046 */ 3047 p = (char *)ph->ph_cur_pos; 3048 end = (char *)ph->ph_data + ph->ph_size; 3049 if (p >= end) 3050 return (DDI_PROP_RESULT_EOF); 3051 3052 while (p < end) { 3053 if (*p++ == 0) { /* NULL from OBP */ 3054 ph->ph_cur_pos = p; 3055 return (DDI_PROP_RESULT_OK); 3056 } 3057 } 3058 3059 /* 3060 * Accommodate the fact that OBP does not always NULL 3061 * terminate strings. 3062 */ 3063 ph->ph_cur_pos = p; 3064 return (DDI_PROP_RESULT_OK); 3065 3066 case DDI_PROP_CMD_GET_ESIZE: 3067 /* 3068 * Return the size of the encoded string on OBP. 3069 */ 3070 return (strlen(data) + 1); 3071 3072 case DDI_PROP_CMD_GET_DSIZE: 3073 /* 3074 * Return the string length plus one for the NULL. 3075 * We know the size of the property, we need to 3076 * ensure that the string is properly formatted, 3077 * since we may be looking up random OBP data. 3078 */ 3079 p = (char *)ph->ph_cur_pos; 3080 end = (char *)ph->ph_data + ph->ph_size; 3081 if (p >= end) 3082 return (DDI_PROP_RESULT_EOF); 3083 3084 for (n = 0; p < end; n++) { 3085 if (*p++ == 0) { /* NULL from OBP */ 3086 ph->ph_cur_pos = p; 3087 return (n + 1); 3088 } 3089 } 3090 3091 /* 3092 * If OBP did not NULL terminate string, which happens for 3093 * 'true'/'false' boolean values, account for the space 3094 * to store null termination here. 3095 */ 3096 ph->ph_cur_pos = p; 3097 return (n + 1); 3098 3099 default: 3100 #ifdef DEBUG 3101 panic("ddi_prop_1275_string: %x impossible", cmd); 3102 /*NOTREACHED*/ 3103 #else 3104 return (DDI_PROP_RESULT_ERROR); 3105 #endif /* DEBUG */ 3106 } 3107 } 3108 3109 /* 3110 * OBP 1275 byte operator 3111 * 3112 * Caller must specify the number of bytes to get. OBP encodes bytes 3113 * as a byte so there is a 1-to-1 translation. 3114 */ 3115 int 3116 ddi_prop_1275_bytes(prop_handle_t *ph, uint_t cmd, uchar_t *data, 3117 uint_t nelements) 3118 { 3119 switch (cmd) { 3120 case DDI_PROP_CMD_DECODE: 3121 /* 3122 * Check that there is encoded data 3123 */ 3124 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 3125 ph->ph_size < nelements || 3126 ((char *)ph->ph_cur_pos > ((char *)ph->ph_data + 3127 ph->ph_size - nelements))) 3128 return (DDI_PROP_RESULT_ERROR); 3129 3130 /* 3131 * Copy out the bytes 3132 */ 3133 bcopy(ph->ph_cur_pos, data, nelements); 3134 3135 /* 3136 * Move the current location 3137 */ 3138 ph->ph_cur_pos = (char *)ph->ph_cur_pos + nelements; 3139 return (DDI_PROP_RESULT_OK); 3140 3141 case DDI_PROP_CMD_ENCODE: 3142 /* 3143 * Check that there is room to encode the data 3144 */ 3145 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 3146 ph->ph_size < nelements || 3147 ((char *)ph->ph_cur_pos > ((char *)ph->ph_data + 3148 ph->ph_size - nelements))) 3149 return (DDI_PROP_RESULT_ERROR); 3150 3151 /* 3152 * Copy in the bytes 3153 */ 3154 bcopy(data, ph->ph_cur_pos, nelements); 3155 3156 /* 3157 * Move the current location to the start of the next bit of 3158 * space where we can store encoded data. 3159 */ 3160 ph->ph_cur_pos = (char *)ph->ph_cur_pos + nelements; 3161 return (DDI_PROP_RESULT_OK); 3162 3163 case DDI_PROP_CMD_SKIP: 3164 /* 3165 * Check that there is encoded data 3166 */ 3167 if (ph->ph_cur_pos == NULL || ph->ph_size == 0 || 3168 ph->ph_size < nelements) 3169 return (DDI_PROP_RESULT_ERROR); 3170 3171 if ((char *)ph->ph_cur_pos > ((char *)ph->ph_data + 3172 ph->ph_size - nelements)) 3173 return (DDI_PROP_RESULT_EOF); 3174 3175 /* 3176 * Move the current location 3177 */ 3178 ph->ph_cur_pos = (char *)ph->ph_cur_pos + nelements; 3179 return (DDI_PROP_RESULT_OK); 3180 3181 case DDI_PROP_CMD_GET_ESIZE: 3182 /* 3183 * The size in bytes of the encoded size is the 3184 * same as the decoded size provided by the caller. 3185 */ 3186 return (nelements); 3187 3188 case DDI_PROP_CMD_GET_DSIZE: 3189 /* 3190 * Just return the number of bytes specified by the caller. 3191 */ 3192 return (nelements); 3193 3194 default: 3195 #ifdef DEBUG 3196 panic("ddi_prop_1275_bytes: %x impossible", cmd); 3197 /*NOTREACHED*/ 3198 #else 3199 return (DDI_PROP_RESULT_ERROR); 3200 #endif /* DEBUG */ 3201 } 3202 } 3203 3204 /* 3205 * Used for properties that come from the OBP, hardware configuration files, 3206 * or that are created by calls to ddi_prop_update(9F). 3207 */ 3208 static struct prop_handle_ops prop_1275_ops = { 3209 ddi_prop_1275_int, 3210 ddi_prop_1275_string, 3211 ddi_prop_1275_bytes, 3212 ddi_prop_int64_op 3213 }; 3214 3215 3216 /* 3217 * Interface to create/modify a managed property on child's behalf... 3218 * Flags interpreted are: 3219 * DDI_PROP_CANSLEEP: Allow memory allocation to sleep. 3220 * DDI_PROP_SYSTEM_DEF: Manipulate system list rather than driver list. 3221 * 3222 * Use same dev_t when modifying or undefining a property. 3223 * Search for properties with DDI_DEV_T_ANY to match first named 3224 * property on the list. 3225 * 3226 * Properties are stored LIFO and subsequently will match the first 3227 * `matching' instance. 3228 */ 3229 3230 /* 3231 * ddi_prop_add: Add a software defined property 3232 */ 3233 3234 /* 3235 * define to get a new ddi_prop_t. 3236 * km_flags are KM_SLEEP or KM_NOSLEEP. 3237 */ 3238 3239 #define DDI_NEW_PROP_T(km_flags) \ 3240 (kmem_zalloc(sizeof (ddi_prop_t), km_flags)) 3241 3242 static int 3243 ddi_prop_add(dev_t dev, dev_info_t *dip, int flags, 3244 char *name, caddr_t value, int length) 3245 { 3246 ddi_prop_t *new_propp, *propp; 3247 ddi_prop_t **list_head = &(DEVI(dip)->devi_drv_prop_ptr); 3248 int km_flags = KM_NOSLEEP; 3249 int name_buf_len; 3250 3251 /* 3252 * If dev_t is DDI_DEV_T_ANY or name's length is zero return error. 3253 */ 3254 3255 if (dev == DDI_DEV_T_ANY || name == (char *)0 || strlen(name) == 0) 3256 return (DDI_PROP_INVAL_ARG); 3257 3258 if (flags & DDI_PROP_CANSLEEP) 3259 km_flags = KM_SLEEP; 3260 3261 if (flags & DDI_PROP_SYSTEM_DEF) 3262 list_head = &(DEVI(dip)->devi_sys_prop_ptr); 3263 else if (flags & DDI_PROP_HW_DEF) 3264 list_head = &(DEVI(dip)->devi_hw_prop_ptr); 3265 3266 if ((new_propp = DDI_NEW_PROP_T(km_flags)) == NULL) { 3267 cmn_err(CE_CONT, prop_no_mem_msg, name); 3268 return (DDI_PROP_NO_MEMORY); 3269 } 3270 3271 /* 3272 * If dev is major number 0, then we need to do a ddi_name_to_major 3273 * to get the real major number for the device. This needs to be 3274 * done because some drivers need to call ddi_prop_create in their 3275 * attach routines but they don't have a dev. By creating the dev 3276 * ourself if the major number is 0, drivers will not have to know what 3277 * their major number. They can just create a dev with major number 3278 * 0 and pass it in. For device 0, we will be doing a little extra 3279 * work by recreating the same dev that we already have, but its the 3280 * price you pay :-). 3281 * 3282 * This fixes bug #1098060. 3283 */ 3284 if (getmajor(dev) == DDI_MAJOR_T_UNKNOWN) { 3285 new_propp->prop_dev = 3286 makedevice(ddi_name_to_major(DEVI(dip)->devi_binding_name), 3287 getminor(dev)); 3288 } else 3289 new_propp->prop_dev = dev; 3290 3291 /* 3292 * Allocate space for property name and copy it in... 3293 */ 3294 3295 name_buf_len = strlen(name) + 1; 3296 new_propp->prop_name = kmem_alloc(name_buf_len, km_flags); 3297 if (new_propp->prop_name == 0) { 3298 kmem_free(new_propp, sizeof (ddi_prop_t)); 3299 cmn_err(CE_CONT, prop_no_mem_msg, name); 3300 return (DDI_PROP_NO_MEMORY); 3301 } 3302 bcopy(name, new_propp->prop_name, name_buf_len); 3303 3304 /* 3305 * Set the property type 3306 */ 3307 new_propp->prop_flags = flags & DDI_PROP_TYPE_MASK; 3308 3309 /* 3310 * Set length and value ONLY if not an explicit property undefine: 3311 * NOTE: value and length are zero for explicit undefines. 3312 */ 3313 3314 if (flags & DDI_PROP_UNDEF_IT) { 3315 new_propp->prop_flags |= DDI_PROP_UNDEF_IT; 3316 } else { 3317 if ((new_propp->prop_len = length) != 0) { 3318 new_propp->prop_val = kmem_alloc(length, km_flags); 3319 if (new_propp->prop_val == 0) { 3320 kmem_free(new_propp->prop_name, name_buf_len); 3321 kmem_free(new_propp, sizeof (ddi_prop_t)); 3322 cmn_err(CE_CONT, prop_no_mem_msg, name); 3323 return (DDI_PROP_NO_MEMORY); 3324 } 3325 bcopy(value, new_propp->prop_val, length); 3326 } 3327 } 3328 3329 /* 3330 * Link property into beginning of list. (Properties are LIFO order.) 3331 */ 3332 3333 mutex_enter(&(DEVI(dip)->devi_lock)); 3334 propp = *list_head; 3335 new_propp->prop_next = propp; 3336 *list_head = new_propp; 3337 mutex_exit(&(DEVI(dip)->devi_lock)); 3338 return (DDI_PROP_SUCCESS); 3339 } 3340 3341 3342 /* 3343 * ddi_prop_change: Modify a software managed property value 3344 * 3345 * Set new length and value if found. 3346 * returns DDI_PROP_INVAL_ARG if dev is DDI_DEV_T_ANY or 3347 * input name is the NULL string. 3348 * returns DDI_PROP_NO_MEMORY if unable to allocate memory 3349 * 3350 * Note: an undef can be modified to be a define, 3351 * (you can't go the other way.) 3352 */ 3353 3354 static int 3355 ddi_prop_change(dev_t dev, dev_info_t *dip, int flags, 3356 char *name, caddr_t value, int length) 3357 { 3358 ddi_prop_t *propp; 3359 ddi_prop_t **ppropp; 3360 caddr_t p = NULL; 3361 3362 if ((dev == DDI_DEV_T_ANY) || (name == NULL) || (strlen(name) == 0)) 3363 return (DDI_PROP_INVAL_ARG); 3364 3365 /* 3366 * Preallocate buffer, even if we don't need it... 3367 */ 3368 if (length != 0) { 3369 p = kmem_alloc(length, (flags & DDI_PROP_CANSLEEP) ? 3370 KM_SLEEP : KM_NOSLEEP); 3371 if (p == NULL) { 3372 cmn_err(CE_CONT, prop_no_mem_msg, name); 3373 return (DDI_PROP_NO_MEMORY); 3374 } 3375 } 3376 3377 /* 3378 * If the dev_t value contains DDI_MAJOR_T_UNKNOWN for the major 3379 * number, a real dev_t value should be created based upon the dip's 3380 * binding driver. See ddi_prop_add... 3381 */ 3382 if (getmajor(dev) == DDI_MAJOR_T_UNKNOWN) 3383 dev = makedevice( 3384 ddi_name_to_major(DEVI(dip)->devi_binding_name), 3385 getminor(dev)); 3386 3387 /* 3388 * Check to see if the property exists. If so we modify it. 3389 * Else we create it by calling ddi_prop_add(). 3390 */ 3391 mutex_enter(&(DEVI(dip)->devi_lock)); 3392 ppropp = &DEVI(dip)->devi_drv_prop_ptr; 3393 if (flags & DDI_PROP_SYSTEM_DEF) 3394 ppropp = &DEVI(dip)->devi_sys_prop_ptr; 3395 else if (flags & DDI_PROP_HW_DEF) 3396 ppropp = &DEVI(dip)->devi_hw_prop_ptr; 3397 3398 if ((propp = i_ddi_prop_search(dev, name, flags, ppropp)) != NULL) { 3399 /* 3400 * Need to reallocate buffer? If so, do it 3401 * carefully (reuse same space if new prop 3402 * is same size and non-NULL sized). 3403 */ 3404 if (length != 0) 3405 bcopy(value, p, length); 3406 3407 if (propp->prop_len != 0) 3408 kmem_free(propp->prop_val, propp->prop_len); 3409 3410 propp->prop_len = length; 3411 propp->prop_val = p; 3412 propp->prop_flags &= ~DDI_PROP_UNDEF_IT; 3413 mutex_exit(&(DEVI(dip)->devi_lock)); 3414 return (DDI_PROP_SUCCESS); 3415 } 3416 3417 mutex_exit(&(DEVI(dip)->devi_lock)); 3418 if (length != 0) 3419 kmem_free(p, length); 3420 3421 return (ddi_prop_add(dev, dip, flags, name, value, length)); 3422 } 3423 3424 /* 3425 * Common update routine used to update and encode a property. Creates 3426 * a property handle, calls the property encode routine, figures out if 3427 * the property already exists and updates if it does. Otherwise it 3428 * creates if it does not exist. 3429 */ 3430 int 3431 ddi_prop_update_common(dev_t match_dev, dev_info_t *dip, int flags, 3432 char *name, void *data, uint_t nelements, 3433 int (*prop_create)(prop_handle_t *, void *data, uint_t nelements)) 3434 { 3435 prop_handle_t ph; 3436 int rval; 3437 uint_t ourflags; 3438 3439 /* 3440 * If dev_t is DDI_DEV_T_ANY or name's length is zero, 3441 * return error. 3442 */ 3443 if (match_dev == DDI_DEV_T_ANY || name == NULL || strlen(name) == 0) 3444 return (DDI_PROP_INVAL_ARG); 3445 3446 /* 3447 * Create the handle 3448 */ 3449 ph.ph_data = NULL; 3450 ph.ph_cur_pos = NULL; 3451 ph.ph_save_pos = NULL; 3452 ph.ph_size = 0; 3453 ph.ph_ops = &prop_1275_ops; 3454 3455 /* 3456 * ourflags: 3457 * For compatibility with the old interfaces. The old interfaces 3458 * didn't sleep by default and slept when the flag was set. These 3459 * interfaces to the opposite. So the old interfaces now set the 3460 * DDI_PROP_DONTSLEEP flag by default which tells us not to sleep. 3461 * 3462 * ph.ph_flags: 3463 * Blocked data or unblocked data allocation 3464 * for ph.ph_data in ddi_prop_encode_alloc() 3465 */ 3466 if (flags & DDI_PROP_DONTSLEEP) { 3467 ourflags = flags; 3468 ph.ph_flags = DDI_PROP_DONTSLEEP; 3469 } else { 3470 ourflags = flags | DDI_PROP_CANSLEEP; 3471 ph.ph_flags = DDI_PROP_CANSLEEP; 3472 } 3473 3474 /* 3475 * Encode the data and store it in the property handle by 3476 * calling the prop_encode routine. 3477 */ 3478 if ((rval = (*prop_create)(&ph, data, nelements)) != 3479 DDI_PROP_SUCCESS) { 3480 if (rval == DDI_PROP_NO_MEMORY) 3481 cmn_err(CE_CONT, prop_no_mem_msg, name); 3482 if (ph.ph_size != 0) 3483 kmem_free(ph.ph_data, ph.ph_size); 3484 return (rval); 3485 } 3486 3487 /* 3488 * The old interfaces use a stacking approach to creating 3489 * properties. If we are being called from the old interfaces, 3490 * the DDI_PROP_STACK_CREATE flag will be set, so we just do a 3491 * create without checking. 3492 */ 3493 if (flags & DDI_PROP_STACK_CREATE) { 3494 rval = ddi_prop_add(match_dev, dip, 3495 ourflags, name, ph.ph_data, ph.ph_size); 3496 } else { 3497 rval = ddi_prop_change(match_dev, dip, 3498 ourflags, name, ph.ph_data, ph.ph_size); 3499 } 3500 3501 /* 3502 * Free the encoded data allocated in the prop_encode routine. 3503 */ 3504 if (ph.ph_size != 0) 3505 kmem_free(ph.ph_data, ph.ph_size); 3506 3507 return (rval); 3508 } 3509 3510 3511 /* 3512 * ddi_prop_create: Define a managed property: 3513 * See above for details. 3514 */ 3515 3516 int 3517 ddi_prop_create(dev_t dev, dev_info_t *dip, int flag, 3518 char *name, caddr_t value, int length) 3519 { 3520 if (!(flag & DDI_PROP_CANSLEEP)) { 3521 flag |= DDI_PROP_DONTSLEEP; 3522 #ifdef DDI_PROP_DEBUG 3523 if (length != 0) 3524 cmn_err(CE_NOTE, "!ddi_prop_create: interface obsolete," 3525 "use ddi_prop_update (prop = %s, node = %s%d)", 3526 name, ddi_driver_name(dip), ddi_get_instance(dip)); 3527 #endif /* DDI_PROP_DEBUG */ 3528 } 3529 flag &= ~DDI_PROP_SYSTEM_DEF; 3530 flag |= DDI_PROP_STACK_CREATE | DDI_PROP_TYPE_ANY; 3531 return (ddi_prop_update_common(dev, dip, flag, name, 3532 value, length, ddi_prop_fm_encode_bytes)); 3533 } 3534 3535 int 3536 e_ddi_prop_create(dev_t dev, dev_info_t *dip, int flag, 3537 char *name, caddr_t value, int length) 3538 { 3539 if (!(flag & DDI_PROP_CANSLEEP)) 3540 flag |= DDI_PROP_DONTSLEEP; 3541 flag |= DDI_PROP_SYSTEM_DEF | DDI_PROP_STACK_CREATE | DDI_PROP_TYPE_ANY; 3542 return (ddi_prop_update_common(dev, dip, flag, 3543 name, value, length, ddi_prop_fm_encode_bytes)); 3544 } 3545 3546 int 3547 ddi_prop_modify(dev_t dev, dev_info_t *dip, int flag, 3548 char *name, caddr_t value, int length) 3549 { 3550 ASSERT((flag & DDI_PROP_TYPE_MASK) == 0); 3551 3552 /* 3553 * If dev_t is DDI_DEV_T_ANY or name's length is zero, 3554 * return error. 3555 */ 3556 if (dev == DDI_DEV_T_ANY || name == NULL || strlen(name) == 0) 3557 return (DDI_PROP_INVAL_ARG); 3558 3559 if (!(flag & DDI_PROP_CANSLEEP)) 3560 flag |= DDI_PROP_DONTSLEEP; 3561 flag &= ~DDI_PROP_SYSTEM_DEF; 3562 if (ddi_prop_exists(dev, dip, (flag | DDI_PROP_NOTPROM), name) == 0) 3563 return (DDI_PROP_NOT_FOUND); 3564 3565 return (ddi_prop_update_common(dev, dip, 3566 (flag | DDI_PROP_TYPE_BYTE), name, 3567 value, length, ddi_prop_fm_encode_bytes)); 3568 } 3569 3570 int 3571 e_ddi_prop_modify(dev_t dev, dev_info_t *dip, int flag, 3572 char *name, caddr_t value, int length) 3573 { 3574 ASSERT((flag & DDI_PROP_TYPE_MASK) == 0); 3575 3576 /* 3577 * If dev_t is DDI_DEV_T_ANY or name's length is zero, 3578 * return error. 3579 */ 3580 if (dev == DDI_DEV_T_ANY || name == NULL || strlen(name) == 0) 3581 return (DDI_PROP_INVAL_ARG); 3582 3583 if (ddi_prop_exists(dev, dip, (flag | DDI_PROP_SYSTEM_DEF), name) == 0) 3584 return (DDI_PROP_NOT_FOUND); 3585 3586 if (!(flag & DDI_PROP_CANSLEEP)) 3587 flag |= DDI_PROP_DONTSLEEP; 3588 return (ddi_prop_update_common(dev, dip, 3589 (flag | DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_BYTE), 3590 name, value, length, ddi_prop_fm_encode_bytes)); 3591 } 3592 3593 3594 /* 3595 * Common lookup routine used to lookup and decode a property. 3596 * Creates a property handle, searches for the raw encoded data, 3597 * fills in the handle, and calls the property decode functions 3598 * passed in. 3599 * 3600 * This routine is not static because ddi_bus_prop_op() which lives in 3601 * ddi_impl.c calls it. No driver should be calling this routine. 3602 */ 3603 int 3604 ddi_prop_lookup_common(dev_t match_dev, dev_info_t *dip, 3605 uint_t flags, char *name, void *data, uint_t *nelements, 3606 int (*prop_decoder)(prop_handle_t *, void *data, uint_t *nelements)) 3607 { 3608 int rval; 3609 uint_t ourflags; 3610 prop_handle_t ph; 3611 3612 if ((match_dev == DDI_DEV_T_NONE) || 3613 (name == NULL) || (strlen(name) == 0)) 3614 return (DDI_PROP_INVAL_ARG); 3615 3616 ourflags = (flags & DDI_PROP_DONTSLEEP) ? flags : 3617 flags | DDI_PROP_CANSLEEP; 3618 3619 /* 3620 * Get the encoded data 3621 */ 3622 bzero(&ph, sizeof (prop_handle_t)); 3623 3624 if ((flags & DDI_UNBND_DLPI2) || (flags & DDI_PROP_ROOTNEX_GLOBAL)) { 3625 /* 3626 * For rootnex and unbound dlpi style-2 devices, index into 3627 * the devnames' array and search the global 3628 * property list. 3629 */ 3630 ourflags &= ~DDI_UNBND_DLPI2; 3631 rval = i_ddi_prop_search_global(match_dev, 3632 ourflags, name, &ph.ph_data, &ph.ph_size); 3633 } else { 3634 rval = ddi_prop_search_common(match_dev, dip, 3635 PROP_LEN_AND_VAL_ALLOC, ourflags, name, 3636 &ph.ph_data, &ph.ph_size); 3637 3638 } 3639 3640 if (rval != DDI_PROP_SUCCESS && rval != DDI_PROP_FOUND_1275) { 3641 ASSERT(ph.ph_data == NULL); 3642 ASSERT(ph.ph_size == 0); 3643 return (rval); 3644 } 3645 3646 /* 3647 * If the encoded data came from a OBP or software 3648 * use the 1275 OBP decode/encode routines. 3649 */ 3650 ph.ph_cur_pos = ph.ph_data; 3651 ph.ph_save_pos = ph.ph_data; 3652 ph.ph_ops = &prop_1275_ops; 3653 ph.ph_flags = (rval == DDI_PROP_FOUND_1275) ? PH_FROM_PROM : 0; 3654 3655 rval = (*prop_decoder)(&ph, data, nelements); 3656 3657 /* 3658 * Free the encoded data 3659 */ 3660 if (ph.ph_size != 0) 3661 kmem_free(ph.ph_data, ph.ph_size); 3662 3663 return (rval); 3664 } 3665 3666 /* 3667 * Lookup and return an array of composite properties. The driver must 3668 * provide the decode routine. 3669 */ 3670 int 3671 ddi_prop_lookup(dev_t match_dev, dev_info_t *dip, 3672 uint_t flags, char *name, void *data, uint_t *nelements, 3673 int (*prop_decoder)(prop_handle_t *, void *data, uint_t *nelements)) 3674 { 3675 return (ddi_prop_lookup_common(match_dev, dip, 3676 (flags | DDI_PROP_TYPE_COMPOSITE), name, 3677 data, nelements, prop_decoder)); 3678 } 3679 3680 /* 3681 * Return 1 if a property exists (no type checking done). 3682 * Return 0 if it does not exist. 3683 */ 3684 int 3685 ddi_prop_exists(dev_t match_dev, dev_info_t *dip, uint_t flags, char *name) 3686 { 3687 int i; 3688 uint_t x = 0; 3689 3690 i = ddi_prop_search_common(match_dev, dip, PROP_EXISTS, 3691 flags | DDI_PROP_TYPE_MASK, name, NULL, &x); 3692 return (i == DDI_PROP_SUCCESS || i == DDI_PROP_FOUND_1275); 3693 } 3694 3695 3696 /* 3697 * Update an array of composite properties. The driver must 3698 * provide the encode routine. 3699 */ 3700 int 3701 ddi_prop_update(dev_t match_dev, dev_info_t *dip, 3702 char *name, void *data, uint_t nelements, 3703 int (*prop_create)(prop_handle_t *, void *data, uint_t nelements)) 3704 { 3705 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_COMPOSITE, 3706 name, data, nelements, prop_create)); 3707 } 3708 3709 /* 3710 * Get a single integer or boolean property and return it. 3711 * If the property does not exists, or cannot be decoded, 3712 * then return the defvalue passed in. 3713 * 3714 * This routine always succeeds. 3715 */ 3716 int 3717 ddi_prop_get_int(dev_t match_dev, dev_info_t *dip, uint_t flags, 3718 char *name, int defvalue) 3719 { 3720 int data; 3721 uint_t nelements; 3722 int rval; 3723 3724 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3725 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3726 #ifdef DEBUG 3727 if (dip != NULL) { 3728 cmn_err(CE_WARN, "ddi_prop_get_int: invalid flag" 3729 " 0x%x (prop = %s, node = %s%d)", flags, 3730 name, ddi_driver_name(dip), ddi_get_instance(dip)); 3731 } 3732 #endif /* DEBUG */ 3733 flags &= DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3734 LDI_DEV_T_ANY | DDI_UNBND_DLPI2; 3735 } 3736 3737 if ((rval = ddi_prop_lookup_common(match_dev, dip, 3738 (flags | DDI_PROP_TYPE_INT), name, &data, &nelements, 3739 ddi_prop_fm_decode_int)) != DDI_PROP_SUCCESS) { 3740 if (rval == DDI_PROP_END_OF_DATA) 3741 data = 1; 3742 else 3743 data = defvalue; 3744 } 3745 return (data); 3746 } 3747 3748 /* 3749 * Get a single 64 bit integer or boolean property and return it. 3750 * If the property does not exists, or cannot be decoded, 3751 * then return the defvalue passed in. 3752 * 3753 * This routine always succeeds. 3754 */ 3755 int64_t 3756 ddi_prop_get_int64(dev_t match_dev, dev_info_t *dip, uint_t flags, 3757 char *name, int64_t defvalue) 3758 { 3759 int64_t data; 3760 uint_t nelements; 3761 int rval; 3762 3763 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3764 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3765 #ifdef DEBUG 3766 if (dip != NULL) { 3767 cmn_err(CE_WARN, "ddi_prop_get_int64: invalid flag" 3768 " 0x%x (prop = %s, node = %s%d)", flags, 3769 name, ddi_driver_name(dip), ddi_get_instance(dip)); 3770 } 3771 #endif /* DEBUG */ 3772 return (DDI_PROP_INVAL_ARG); 3773 } 3774 3775 if ((rval = ddi_prop_lookup_common(match_dev, dip, 3776 (flags | DDI_PROP_TYPE_INT64 | DDI_PROP_NOTPROM), 3777 name, &data, &nelements, ddi_prop_fm_decode_int64)) 3778 != DDI_PROP_SUCCESS) { 3779 if (rval == DDI_PROP_END_OF_DATA) 3780 data = 1; 3781 else 3782 data = defvalue; 3783 } 3784 return (data); 3785 } 3786 3787 /* 3788 * Get an array of integer property 3789 */ 3790 int 3791 ddi_prop_lookup_int_array(dev_t match_dev, dev_info_t *dip, uint_t flags, 3792 char *name, int **data, uint_t *nelements) 3793 { 3794 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3795 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3796 #ifdef DEBUG 3797 if (dip != NULL) { 3798 cmn_err(CE_WARN, "ddi_prop_lookup_int_array: " 3799 "invalid flag 0x%x (prop = %s, node = %s%d)", 3800 flags, name, ddi_driver_name(dip), 3801 ddi_get_instance(dip)); 3802 } 3803 #endif /* DEBUG */ 3804 flags &= DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3805 LDI_DEV_T_ANY | DDI_UNBND_DLPI2; 3806 } 3807 3808 return (ddi_prop_lookup_common(match_dev, dip, 3809 (flags | DDI_PROP_TYPE_INT), name, data, 3810 nelements, ddi_prop_fm_decode_ints)); 3811 } 3812 3813 /* 3814 * Get an array of 64 bit integer properties 3815 */ 3816 int 3817 ddi_prop_lookup_int64_array(dev_t match_dev, dev_info_t *dip, uint_t flags, 3818 char *name, int64_t **data, uint_t *nelements) 3819 { 3820 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3821 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3822 #ifdef DEBUG 3823 if (dip != NULL) { 3824 cmn_err(CE_WARN, "ddi_prop_lookup_int64_array: " 3825 "invalid flag 0x%x (prop = %s, node = %s%d)", 3826 flags, name, ddi_driver_name(dip), 3827 ddi_get_instance(dip)); 3828 } 3829 #endif /* DEBUG */ 3830 return (DDI_PROP_INVAL_ARG); 3831 } 3832 3833 return (ddi_prop_lookup_common(match_dev, dip, 3834 (flags | DDI_PROP_TYPE_INT64 | DDI_PROP_NOTPROM), 3835 name, data, nelements, ddi_prop_fm_decode_int64_array)); 3836 } 3837 3838 /* 3839 * Update a single integer property. If the property exists on the drivers 3840 * property list it updates, else it creates it. 3841 */ 3842 int 3843 ddi_prop_update_int(dev_t match_dev, dev_info_t *dip, 3844 char *name, int data) 3845 { 3846 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_INT, 3847 name, &data, 1, ddi_prop_fm_encode_ints)); 3848 } 3849 3850 /* 3851 * Update a single 64 bit integer property. 3852 * Update the driver property list if it exists, else create it. 3853 */ 3854 int 3855 ddi_prop_update_int64(dev_t match_dev, dev_info_t *dip, 3856 char *name, int64_t data) 3857 { 3858 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_INT64, 3859 name, &data, 1, ddi_prop_fm_encode_int64)); 3860 } 3861 3862 int 3863 e_ddi_prop_update_int(dev_t match_dev, dev_info_t *dip, 3864 char *name, int data) 3865 { 3866 return (ddi_prop_update_common(match_dev, dip, 3867 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_INT, 3868 name, &data, 1, ddi_prop_fm_encode_ints)); 3869 } 3870 3871 int 3872 e_ddi_prop_update_int64(dev_t match_dev, dev_info_t *dip, 3873 char *name, int64_t data) 3874 { 3875 return (ddi_prop_update_common(match_dev, dip, 3876 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_INT64, 3877 name, &data, 1, ddi_prop_fm_encode_int64)); 3878 } 3879 3880 /* 3881 * Update an array of integer property. If the property exists on the drivers 3882 * property list it updates, else it creates it. 3883 */ 3884 int 3885 ddi_prop_update_int_array(dev_t match_dev, dev_info_t *dip, 3886 char *name, int *data, uint_t nelements) 3887 { 3888 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_INT, 3889 name, data, nelements, ddi_prop_fm_encode_ints)); 3890 } 3891 3892 /* 3893 * Update an array of 64 bit integer properties. 3894 * Update the driver property list if it exists, else create it. 3895 */ 3896 int 3897 ddi_prop_update_int64_array(dev_t match_dev, dev_info_t *dip, 3898 char *name, int64_t *data, uint_t nelements) 3899 { 3900 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_INT64, 3901 name, data, nelements, ddi_prop_fm_encode_int64)); 3902 } 3903 3904 int 3905 e_ddi_prop_update_int64_array(dev_t match_dev, dev_info_t *dip, 3906 char *name, int64_t *data, uint_t nelements) 3907 { 3908 return (ddi_prop_update_common(match_dev, dip, 3909 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_INT64, 3910 name, data, nelements, ddi_prop_fm_encode_int64)); 3911 } 3912 3913 int 3914 e_ddi_prop_update_int_array(dev_t match_dev, dev_info_t *dip, 3915 char *name, int *data, uint_t nelements) 3916 { 3917 return (ddi_prop_update_common(match_dev, dip, 3918 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_INT, 3919 name, data, nelements, ddi_prop_fm_encode_ints)); 3920 } 3921 3922 /* 3923 * Get a single string property. 3924 */ 3925 int 3926 ddi_prop_lookup_string(dev_t match_dev, dev_info_t *dip, uint_t flags, 3927 char *name, char **data) 3928 { 3929 uint_t x; 3930 3931 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3932 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3933 #ifdef DEBUG 3934 if (dip != NULL) { 3935 cmn_err(CE_WARN, "%s: invalid flag 0x%x " 3936 "(prop = %s, node = %s%d); invalid bits ignored", 3937 "ddi_prop_lookup_string", flags, name, 3938 ddi_driver_name(dip), ddi_get_instance(dip)); 3939 } 3940 #endif /* DEBUG */ 3941 flags &= DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3942 LDI_DEV_T_ANY | DDI_UNBND_DLPI2; 3943 } 3944 3945 return (ddi_prop_lookup_common(match_dev, dip, 3946 (flags | DDI_PROP_TYPE_STRING), name, data, 3947 &x, ddi_prop_fm_decode_string)); 3948 } 3949 3950 /* 3951 * Get an array of strings property. 3952 */ 3953 int 3954 ddi_prop_lookup_string_array(dev_t match_dev, dev_info_t *dip, uint_t flags, 3955 char *name, char ***data, uint_t *nelements) 3956 { 3957 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3958 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 3959 #ifdef DEBUG 3960 if (dip != NULL) { 3961 cmn_err(CE_WARN, "ddi_prop_lookup_string_array: " 3962 "invalid flag 0x%x (prop = %s, node = %s%d)", 3963 flags, name, ddi_driver_name(dip), 3964 ddi_get_instance(dip)); 3965 } 3966 #endif /* DEBUG */ 3967 flags &= DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 3968 LDI_DEV_T_ANY | DDI_UNBND_DLPI2; 3969 } 3970 3971 return (ddi_prop_lookup_common(match_dev, dip, 3972 (flags | DDI_PROP_TYPE_STRING), name, data, 3973 nelements, ddi_prop_fm_decode_strings)); 3974 } 3975 3976 /* 3977 * Update a single string property. 3978 */ 3979 int 3980 ddi_prop_update_string(dev_t match_dev, dev_info_t *dip, 3981 char *name, char *data) 3982 { 3983 return (ddi_prop_update_common(match_dev, dip, 3984 DDI_PROP_TYPE_STRING, name, &data, 1, 3985 ddi_prop_fm_encode_string)); 3986 } 3987 3988 int 3989 e_ddi_prop_update_string(dev_t match_dev, dev_info_t *dip, 3990 char *name, char *data) 3991 { 3992 return (ddi_prop_update_common(match_dev, dip, 3993 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_STRING, 3994 name, &data, 1, ddi_prop_fm_encode_string)); 3995 } 3996 3997 3998 /* 3999 * Update an array of strings property. 4000 */ 4001 int 4002 ddi_prop_update_string_array(dev_t match_dev, dev_info_t *dip, 4003 char *name, char **data, uint_t nelements) 4004 { 4005 return (ddi_prop_update_common(match_dev, dip, 4006 DDI_PROP_TYPE_STRING, name, data, nelements, 4007 ddi_prop_fm_encode_strings)); 4008 } 4009 4010 int 4011 e_ddi_prop_update_string_array(dev_t match_dev, dev_info_t *dip, 4012 char *name, char **data, uint_t nelements) 4013 { 4014 return (ddi_prop_update_common(match_dev, dip, 4015 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_STRING, 4016 name, data, nelements, 4017 ddi_prop_fm_encode_strings)); 4018 } 4019 4020 4021 /* 4022 * Get an array of bytes property. 4023 */ 4024 int 4025 ddi_prop_lookup_byte_array(dev_t match_dev, dev_info_t *dip, uint_t flags, 4026 char *name, uchar_t **data, uint_t *nelements) 4027 { 4028 if (flags & ~(DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 4029 LDI_DEV_T_ANY | DDI_UNBND_DLPI2 | DDI_PROP_ROOTNEX_GLOBAL)) { 4030 #ifdef DEBUG 4031 if (dip != NULL) { 4032 cmn_err(CE_WARN, "ddi_prop_lookup_byte_array: " 4033 " invalid flag 0x%x (prop = %s, node = %s%d)", 4034 flags, name, ddi_driver_name(dip), 4035 ddi_get_instance(dip)); 4036 } 4037 #endif /* DEBUG */ 4038 flags &= DDI_PROP_DONTPASS | DDI_PROP_NOTPROM | 4039 LDI_DEV_T_ANY | DDI_UNBND_DLPI2; 4040 } 4041 4042 return (ddi_prop_lookup_common(match_dev, dip, 4043 (flags | DDI_PROP_TYPE_BYTE), name, data, 4044 nelements, ddi_prop_fm_decode_bytes)); 4045 } 4046 4047 /* 4048 * Update an array of bytes property. 4049 */ 4050 int 4051 ddi_prop_update_byte_array(dev_t match_dev, dev_info_t *dip, 4052 char *name, uchar_t *data, uint_t nelements) 4053 { 4054 if (nelements == 0) 4055 return (DDI_PROP_INVAL_ARG); 4056 4057 return (ddi_prop_update_common(match_dev, dip, DDI_PROP_TYPE_BYTE, 4058 name, data, nelements, ddi_prop_fm_encode_bytes)); 4059 } 4060 4061 4062 int 4063 e_ddi_prop_update_byte_array(dev_t match_dev, dev_info_t *dip, 4064 char *name, uchar_t *data, uint_t nelements) 4065 { 4066 if (nelements == 0) 4067 return (DDI_PROP_INVAL_ARG); 4068 4069 return (ddi_prop_update_common(match_dev, dip, 4070 DDI_PROP_SYSTEM_DEF | DDI_PROP_TYPE_BYTE, 4071 name, data, nelements, ddi_prop_fm_encode_bytes)); 4072 } 4073 4074 4075 /* 4076 * ddi_prop_remove_common: Undefine a managed property: 4077 * Input dev_t must match dev_t when defined. 4078 * Returns DDI_PROP_NOT_FOUND, possibly. 4079 * DDI_PROP_INVAL_ARG is also possible if dev is 4080 * DDI_DEV_T_ANY or incoming name is the NULL string. 4081 */ 4082 int 4083 ddi_prop_remove_common(dev_t dev, dev_info_t *dip, char *name, int flag) 4084 { 4085 ddi_prop_t **list_head = &(DEVI(dip)->devi_drv_prop_ptr); 4086 ddi_prop_t *propp; 4087 ddi_prop_t *lastpropp = NULL; 4088 4089 if ((dev == DDI_DEV_T_ANY) || (name == (char *)0) || 4090 (strlen(name) == 0)) { 4091 return (DDI_PROP_INVAL_ARG); 4092 } 4093 4094 if (flag & DDI_PROP_SYSTEM_DEF) 4095 list_head = &(DEVI(dip)->devi_sys_prop_ptr); 4096 else if (flag & DDI_PROP_HW_DEF) 4097 list_head = &(DEVI(dip)->devi_hw_prop_ptr); 4098 4099 mutex_enter(&(DEVI(dip)->devi_lock)); 4100 4101 for (propp = *list_head; propp != NULL; propp = propp->prop_next) { 4102 if (DDI_STRSAME(propp->prop_name, name) && 4103 (dev == propp->prop_dev)) { 4104 /* 4105 * Unlink this propp allowing for it to 4106 * be first in the list: 4107 */ 4108 4109 if (lastpropp == NULL) 4110 *list_head = propp->prop_next; 4111 else 4112 lastpropp->prop_next = propp->prop_next; 4113 4114 mutex_exit(&(DEVI(dip)->devi_lock)); 4115 4116 /* 4117 * Free memory and return... 4118 */ 4119 kmem_free(propp->prop_name, 4120 strlen(propp->prop_name) + 1); 4121 if (propp->prop_len != 0) 4122 kmem_free(propp->prop_val, propp->prop_len); 4123 kmem_free(propp, sizeof (ddi_prop_t)); 4124 return (DDI_PROP_SUCCESS); 4125 } 4126 lastpropp = propp; 4127 } 4128 mutex_exit(&(DEVI(dip)->devi_lock)); 4129 return (DDI_PROP_NOT_FOUND); 4130 } 4131 4132 int 4133 ddi_prop_remove(dev_t dev, dev_info_t *dip, char *name) 4134 { 4135 return (ddi_prop_remove_common(dev, dip, name, 0)); 4136 } 4137 4138 int 4139 e_ddi_prop_remove(dev_t dev, dev_info_t *dip, char *name) 4140 { 4141 return (ddi_prop_remove_common(dev, dip, name, DDI_PROP_SYSTEM_DEF)); 4142 } 4143 4144 /* 4145 * e_ddi_prop_list_delete: remove a list of properties 4146 * Note that the caller needs to provide the required protection 4147 * (eg. devi_lock if these properties are still attached to a devi) 4148 */ 4149 void 4150 e_ddi_prop_list_delete(ddi_prop_t *props) 4151 { 4152 i_ddi_prop_list_delete(props); 4153 } 4154 4155 /* 4156 * ddi_prop_remove_all_common: 4157 * Used before unloading a driver to remove 4158 * all properties. (undefines all dev_t's props.) 4159 * Also removes `explicitly undefined' props. 4160 * No errors possible. 4161 */ 4162 void 4163 ddi_prop_remove_all_common(dev_info_t *dip, int flag) 4164 { 4165 ddi_prop_t **list_head; 4166 4167 mutex_enter(&(DEVI(dip)->devi_lock)); 4168 if (flag & DDI_PROP_SYSTEM_DEF) { 4169 list_head = &(DEVI(dip)->devi_sys_prop_ptr); 4170 } else if (flag & DDI_PROP_HW_DEF) { 4171 list_head = &(DEVI(dip)->devi_hw_prop_ptr); 4172 } else { 4173 list_head = &(DEVI(dip)->devi_drv_prop_ptr); 4174 } 4175 i_ddi_prop_list_delete(*list_head); 4176 *list_head = NULL; 4177 mutex_exit(&(DEVI(dip)->devi_lock)); 4178 } 4179 4180 4181 /* 4182 * ddi_prop_remove_all: Remove all driver prop definitions. 4183 */ 4184 4185 void 4186 ddi_prop_remove_all(dev_info_t *dip) 4187 { 4188 i_ddi_prop_dyn_driver_set(dip, NULL); 4189 ddi_prop_remove_all_common(dip, 0); 4190 } 4191 4192 /* 4193 * e_ddi_prop_remove_all: Remove all system prop definitions. 4194 */ 4195 4196 void 4197 e_ddi_prop_remove_all(dev_info_t *dip) 4198 { 4199 ddi_prop_remove_all_common(dip, (int)DDI_PROP_SYSTEM_DEF); 4200 } 4201 4202 4203 /* 4204 * ddi_prop_undefine: Explicitly undefine a property. Property 4205 * searches which match this property return 4206 * the error code DDI_PROP_UNDEFINED. 4207 * 4208 * Use ddi_prop_remove to negate effect of 4209 * ddi_prop_undefine 4210 * 4211 * See above for error returns. 4212 */ 4213 4214 int 4215 ddi_prop_undefine(dev_t dev, dev_info_t *dip, int flag, char *name) 4216 { 4217 if (!(flag & DDI_PROP_CANSLEEP)) 4218 flag |= DDI_PROP_DONTSLEEP; 4219 flag |= DDI_PROP_STACK_CREATE | DDI_PROP_UNDEF_IT | DDI_PROP_TYPE_ANY; 4220 return (ddi_prop_update_common(dev, dip, flag, 4221 name, NULL, 0, ddi_prop_fm_encode_bytes)); 4222 } 4223 4224 int 4225 e_ddi_prop_undefine(dev_t dev, dev_info_t *dip, int flag, char *name) 4226 { 4227 if (!(flag & DDI_PROP_CANSLEEP)) 4228 flag |= DDI_PROP_DONTSLEEP; 4229 flag |= DDI_PROP_SYSTEM_DEF | DDI_PROP_STACK_CREATE | 4230 DDI_PROP_UNDEF_IT | DDI_PROP_TYPE_ANY; 4231 return (ddi_prop_update_common(dev, dip, flag, 4232 name, NULL, 0, ddi_prop_fm_encode_bytes)); 4233 } 4234 4235 /* 4236 * Support for gathering dynamic properties in devinfo snapshot. 4237 */ 4238 void 4239 i_ddi_prop_dyn_driver_set(dev_info_t *dip, i_ddi_prop_dyn_t *dp) 4240 { 4241 DEVI(dip)->devi_prop_dyn_driver = dp; 4242 } 4243 4244 i_ddi_prop_dyn_t * 4245 i_ddi_prop_dyn_driver_get(dev_info_t *dip) 4246 { 4247 return (DEVI(dip)->devi_prop_dyn_driver); 4248 } 4249 4250 void 4251 i_ddi_prop_dyn_parent_set(dev_info_t *dip, i_ddi_prop_dyn_t *dp) 4252 { 4253 DEVI(dip)->devi_prop_dyn_parent = dp; 4254 } 4255 4256 i_ddi_prop_dyn_t * 4257 i_ddi_prop_dyn_parent_get(dev_info_t *dip) 4258 { 4259 return (DEVI(dip)->devi_prop_dyn_parent); 4260 } 4261 4262 void 4263 i_ddi_prop_dyn_cache_invalidate(dev_info_t *dip, i_ddi_prop_dyn_t *dp) 4264 { 4265 /* for now we invalidate the entire cached snapshot */ 4266 if (dip && dp) 4267 i_ddi_di_cache_invalidate(); 4268 } 4269 4270 /* ARGSUSED */ 4271 void 4272 ddi_prop_cache_invalidate(dev_t dev, dev_info_t *dip, char *name, int flags) 4273 { 4274 /* for now we invalidate the entire cached snapshot */ 4275 i_ddi_di_cache_invalidate(); 4276 } 4277 4278 4279 /* 4280 * Code to search hardware layer (PROM), if it exists, on behalf of child. 4281 * 4282 * if input dip != child_dip, then call is on behalf of child 4283 * to search PROM, do it via ddi_prop_search_common() and ascend only 4284 * if allowed. 4285 * 4286 * if input dip == ch_dip (child_dip), call is on behalf of root driver, 4287 * to search for PROM defined props only. 4288 * 4289 * Note that the PROM search is done only if the requested dev 4290 * is either DDI_DEV_T_ANY or DDI_DEV_T_NONE. PROM properties 4291 * have no associated dev, thus are automatically associated with 4292 * DDI_DEV_T_NONE. 4293 * 4294 * Modifying flag DDI_PROP_NOTPROM inhibits the search in the h/w layer. 4295 * 4296 * Returns DDI_PROP_FOUND_1275 if found to indicate to framework 4297 * that the property resides in the prom. 4298 */ 4299 int 4300 impl_ddi_bus_prop_op(dev_t dev, dev_info_t *dip, dev_info_t *ch_dip, 4301 ddi_prop_op_t prop_op, int mod_flags, 4302 char *name, caddr_t valuep, int *lengthp) 4303 { 4304 int len; 4305 caddr_t buffer; 4306 4307 /* 4308 * If requested dev is DDI_DEV_T_NONE or DDI_DEV_T_ANY, then 4309 * look in caller's PROM if it's a self identifying device... 4310 * 4311 * Note that this is very similar to ddi_prop_op, but we 4312 * search the PROM instead of the s/w defined properties, 4313 * and we are called on by the parent driver to do this for 4314 * the child. 4315 */ 4316 4317 if (((dev == DDI_DEV_T_NONE) || (dev == DDI_DEV_T_ANY)) && 4318 ndi_dev_is_prom_node(ch_dip) && 4319 ((mod_flags & DDI_PROP_NOTPROM) == 0)) { 4320 len = prom_getproplen((pnode_t)DEVI(ch_dip)->devi_nodeid, name); 4321 if (len == -1) { 4322 return (DDI_PROP_NOT_FOUND); 4323 } 4324 4325 /* 4326 * If exists only request, we're done 4327 */ 4328 if (prop_op == PROP_EXISTS) { 4329 return (DDI_PROP_FOUND_1275); 4330 } 4331 4332 /* 4333 * If length only request or prop length == 0, get out 4334 */ 4335 if ((prop_op == PROP_LEN) || (len == 0)) { 4336 *lengthp = len; 4337 return (DDI_PROP_FOUND_1275); 4338 } 4339 4340 /* 4341 * Allocate buffer if required... (either way `buffer' 4342 * is receiving address). 4343 */ 4344 4345 switch (prop_op) { 4346 4347 case PROP_LEN_AND_VAL_ALLOC: 4348 4349 buffer = kmem_alloc((size_t)len, 4350 mod_flags & DDI_PROP_CANSLEEP ? 4351 KM_SLEEP : KM_NOSLEEP); 4352 if (buffer == NULL) { 4353 return (DDI_PROP_NO_MEMORY); 4354 } 4355 *(caddr_t *)valuep = buffer; 4356 break; 4357 4358 case PROP_LEN_AND_VAL_BUF: 4359 4360 if (len > (*lengthp)) { 4361 *lengthp = len; 4362 return (DDI_PROP_BUF_TOO_SMALL); 4363 } 4364 4365 buffer = valuep; 4366 break; 4367 4368 default: 4369 break; 4370 } 4371 4372 /* 4373 * Call the PROM function to do the copy. 4374 */ 4375 (void) prom_getprop((pnode_t)DEVI(ch_dip)->devi_nodeid, 4376 name, buffer); 4377 4378 *lengthp = len; /* return the actual length to the caller */ 4379 (void) impl_fix_props(dip, ch_dip, name, len, buffer); 4380 return (DDI_PROP_FOUND_1275); 4381 } 4382 4383 return (DDI_PROP_NOT_FOUND); 4384 } 4385 4386 /* 4387 * The ddi_bus_prop_op default bus nexus prop op function. 4388 * 4389 * Code to search hardware layer (PROM), if it exists, 4390 * on behalf of child, then, if appropriate, ascend and check 4391 * my own software defined properties... 4392 */ 4393 int 4394 ddi_bus_prop_op(dev_t dev, dev_info_t *dip, dev_info_t *ch_dip, 4395 ddi_prop_op_t prop_op, int mod_flags, 4396 char *name, caddr_t valuep, int *lengthp) 4397 { 4398 int error; 4399 4400 error = impl_ddi_bus_prop_op(dev, dip, ch_dip, prop_op, mod_flags, 4401 name, valuep, lengthp); 4402 4403 if (error == DDI_PROP_SUCCESS || error == DDI_PROP_FOUND_1275 || 4404 error == DDI_PROP_BUF_TOO_SMALL) 4405 return (error); 4406 4407 if (error == DDI_PROP_NO_MEMORY) { 4408 cmn_err(CE_CONT, prop_no_mem_msg, name); 4409 return (DDI_PROP_NO_MEMORY); 4410 } 4411 4412 /* 4413 * Check the 'options' node as a last resort 4414 */ 4415 if ((mod_flags & DDI_PROP_DONTPASS) != 0) 4416 return (DDI_PROP_NOT_FOUND); 4417 4418 if (ch_dip == ddi_root_node()) { 4419 /* 4420 * As a last resort, when we've reached 4421 * the top and still haven't found the 4422 * property, see if the desired property 4423 * is attached to the options node. 4424 * 4425 * The options dip is attached right after boot. 4426 */ 4427 ASSERT(options_dip != NULL); 4428 /* 4429 * Force the "don't pass" flag to *just* see 4430 * what the options node has to offer. 4431 */ 4432 return (ddi_prop_search_common(dev, options_dip, prop_op, 4433 mod_flags|DDI_PROP_DONTPASS, name, valuep, 4434 (uint_t *)lengthp)); 4435 } 4436 4437 /* 4438 * Otherwise, continue search with parent's s/w defined properties... 4439 * NOTE: Using `dip' in following call increments the level. 4440 */ 4441 4442 return (ddi_prop_search_common(dev, dip, prop_op, mod_flags, 4443 name, valuep, (uint_t *)lengthp)); 4444 } 4445 4446 /* 4447 * External property functions used by other parts of the kernel... 4448 */ 4449 4450 /* 4451 * e_ddi_getlongprop: See comments for ddi_get_longprop. 4452 */ 4453 4454 int 4455 e_ddi_getlongprop(dev_t dev, vtype_t type, char *name, int flags, 4456 caddr_t valuep, int *lengthp) 4457 { 4458 _NOTE(ARGUNUSED(type)) 4459 dev_info_t *devi; 4460 ddi_prop_op_t prop_op = PROP_LEN_AND_VAL_ALLOC; 4461 int error; 4462 4463 if ((devi = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 4464 return (DDI_PROP_NOT_FOUND); 4465 4466 error = cdev_prop_op(dev, devi, prop_op, flags, name, valuep, lengthp); 4467 ddi_release_devi(devi); 4468 return (error); 4469 } 4470 4471 /* 4472 * e_ddi_getlongprop_buf: See comments for ddi_getlongprop_buf. 4473 */ 4474 4475 int 4476 e_ddi_getlongprop_buf(dev_t dev, vtype_t type, char *name, int flags, 4477 caddr_t valuep, int *lengthp) 4478 { 4479 _NOTE(ARGUNUSED(type)) 4480 dev_info_t *devi; 4481 ddi_prop_op_t prop_op = PROP_LEN_AND_VAL_BUF; 4482 int error; 4483 4484 if ((devi = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 4485 return (DDI_PROP_NOT_FOUND); 4486 4487 error = cdev_prop_op(dev, devi, prop_op, flags, name, valuep, lengthp); 4488 ddi_release_devi(devi); 4489 return (error); 4490 } 4491 4492 /* 4493 * e_ddi_getprop: See comments for ddi_getprop. 4494 */ 4495 int 4496 e_ddi_getprop(dev_t dev, vtype_t type, char *name, int flags, int defvalue) 4497 { 4498 _NOTE(ARGUNUSED(type)) 4499 dev_info_t *devi; 4500 ddi_prop_op_t prop_op = PROP_LEN_AND_VAL_BUF; 4501 int propvalue = defvalue; 4502 int proplength = sizeof (int); 4503 int error; 4504 4505 if ((devi = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 4506 return (defvalue); 4507 4508 error = cdev_prop_op(dev, devi, prop_op, 4509 flags, name, (caddr_t)&propvalue, &proplength); 4510 ddi_release_devi(devi); 4511 4512 if ((error == DDI_PROP_SUCCESS) && (proplength == 0)) 4513 propvalue = 1; 4514 4515 return (propvalue); 4516 } 4517 4518 /* 4519 * e_ddi_getprop_int64: 4520 * 4521 * This is a typed interfaces, but predates typed properties. With the 4522 * introduction of typed properties the framework tries to ensure 4523 * consistent use of typed interfaces. This is why TYPE_INT64 is not 4524 * part of TYPE_ANY. E_ddi_getprop_int64 is a special case where a 4525 * typed interface invokes legacy (non-typed) interfaces: 4526 * cdev_prop_op(), prop_op(9E), ddi_prop_op(9F)). In this case the 4527 * fact that TYPE_INT64 is not part of TYPE_ANY matters. To support 4528 * this type of lookup as a single operation we invoke the legacy 4529 * non-typed interfaces with the special CONSUMER_TYPED bit set. The 4530 * framework ddi_prop_op(9F) implementation is expected to check for 4531 * CONSUMER_TYPED and, if set, expand type bits beyond TYPE_ANY 4532 * (currently TYPE_INT64). 4533 */ 4534 int64_t 4535 e_ddi_getprop_int64(dev_t dev, vtype_t type, char *name, 4536 int flags, int64_t defvalue) 4537 { 4538 _NOTE(ARGUNUSED(type)) 4539 dev_info_t *devi; 4540 ddi_prop_op_t prop_op = PROP_LEN_AND_VAL_BUF; 4541 int64_t propvalue = defvalue; 4542 int proplength = sizeof (propvalue); 4543 int error; 4544 4545 if ((devi = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 4546 return (defvalue); 4547 4548 error = cdev_prop_op(dev, devi, prop_op, flags | 4549 DDI_PROP_CONSUMER_TYPED, name, (caddr_t)&propvalue, &proplength); 4550 ddi_release_devi(devi); 4551 4552 if ((error == DDI_PROP_SUCCESS) && (proplength == 0)) 4553 propvalue = 1; 4554 4555 return (propvalue); 4556 } 4557 4558 /* 4559 * e_ddi_getproplen: See comments for ddi_getproplen. 4560 */ 4561 int 4562 e_ddi_getproplen(dev_t dev, vtype_t type, char *name, int flags, int *lengthp) 4563 { 4564 _NOTE(ARGUNUSED(type)) 4565 dev_info_t *devi; 4566 ddi_prop_op_t prop_op = PROP_LEN; 4567 int error; 4568 4569 if ((devi = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 4570 return (DDI_PROP_NOT_FOUND); 4571 4572 error = cdev_prop_op(dev, devi, prop_op, flags, name, NULL, lengthp); 4573 ddi_release_devi(devi); 4574 return (error); 4575 } 4576 4577 /* 4578 * Routines to get at elements of the dev_info structure 4579 */ 4580 4581 /* 4582 * ddi_binding_name: Return the driver binding name of the devinfo node 4583 * This is the name the OS used to bind the node to a driver. 4584 */ 4585 char * 4586 ddi_binding_name(dev_info_t *dip) 4587 { 4588 return (DEVI(dip)->devi_binding_name); 4589 } 4590 4591 /* 4592 * ddi_driver_major: Return the major number of the driver that 4593 * the supplied devinfo is bound to. If not yet bound, 4594 * DDI_MAJOR_T_NONE. 4595 * 4596 * When used by the driver bound to 'devi', this 4597 * function will reliably return the driver major number. 4598 * Other ways of determining the driver major number, such as 4599 * major = ddi_name_to_major(ddi_get_name(devi)); 4600 * major = ddi_name_to_major(ddi_binding_name(devi)); 4601 * can return a different result as the driver/alias binding 4602 * can change dynamically, and thus should be avoided. 4603 */ 4604 major_t 4605 ddi_driver_major(dev_info_t *devi) 4606 { 4607 return (DEVI(devi)->devi_major); 4608 } 4609 4610 /* 4611 * ddi_driver_name: Return the normalized driver name. this is the 4612 * actual driver name 4613 */ 4614 const char * 4615 ddi_driver_name(dev_info_t *devi) 4616 { 4617 major_t major; 4618 4619 if ((major = ddi_driver_major(devi)) != DDI_MAJOR_T_NONE) 4620 return (ddi_major_to_name(major)); 4621 4622 return (ddi_node_name(devi)); 4623 } 4624 4625 /* 4626 * i_ddi_set_binding_name: Set binding name. 4627 * 4628 * Set the binding name to the given name. 4629 * This routine is for use by the ddi implementation, not by drivers. 4630 */ 4631 void 4632 i_ddi_set_binding_name(dev_info_t *dip, char *name) 4633 { 4634 DEVI(dip)->devi_binding_name = name; 4635 4636 } 4637 4638 /* 4639 * ddi_get_name: A synonym of ddi_binding_name() ... returns a name 4640 * the implementation has used to bind the node to a driver. 4641 */ 4642 char * 4643 ddi_get_name(dev_info_t *dip) 4644 { 4645 return (DEVI(dip)->devi_binding_name); 4646 } 4647 4648 /* 4649 * ddi_node_name: Return the name property of the devinfo node 4650 * This may differ from ddi_binding_name if the node name 4651 * does not define a binding to a driver (i.e. generic names). 4652 */ 4653 char * 4654 ddi_node_name(dev_info_t *dip) 4655 { 4656 return (DEVI(dip)->devi_node_name); 4657 } 4658 4659 4660 /* 4661 * ddi_get_nodeid: Get nodeid stored in dev_info structure. 4662 */ 4663 int 4664 ddi_get_nodeid(dev_info_t *dip) 4665 { 4666 return (DEVI(dip)->devi_nodeid); 4667 } 4668 4669 int 4670 ddi_get_instance(dev_info_t *dip) 4671 { 4672 return (DEVI(dip)->devi_instance); 4673 } 4674 4675 struct dev_ops * 4676 ddi_get_driver(dev_info_t *dip) 4677 { 4678 return (DEVI(dip)->devi_ops); 4679 } 4680 4681 void 4682 ddi_set_driver(dev_info_t *dip, struct dev_ops *devo) 4683 { 4684 DEVI(dip)->devi_ops = devo; 4685 } 4686 4687 /* 4688 * ddi_set_driver_private/ddi_get_driver_private: 4689 * Get/set device driver private data in devinfo. 4690 */ 4691 void 4692 ddi_set_driver_private(dev_info_t *dip, void *data) 4693 { 4694 DEVI(dip)->devi_driver_data = data; 4695 } 4696 4697 void * 4698 ddi_get_driver_private(dev_info_t *dip) 4699 { 4700 return (DEVI(dip)->devi_driver_data); 4701 } 4702 4703 /* 4704 * ddi_get_parent, ddi_get_child, ddi_get_next_sibling 4705 */ 4706 4707 dev_info_t * 4708 ddi_get_parent(dev_info_t *dip) 4709 { 4710 return ((dev_info_t *)DEVI(dip)->devi_parent); 4711 } 4712 4713 dev_info_t * 4714 ddi_get_child(dev_info_t *dip) 4715 { 4716 return ((dev_info_t *)DEVI(dip)->devi_child); 4717 } 4718 4719 dev_info_t * 4720 ddi_get_next_sibling(dev_info_t *dip) 4721 { 4722 return ((dev_info_t *)DEVI(dip)->devi_sibling); 4723 } 4724 4725 dev_info_t * 4726 ddi_get_next(dev_info_t *dip) 4727 { 4728 return ((dev_info_t *)DEVI(dip)->devi_next); 4729 } 4730 4731 void 4732 ddi_set_next(dev_info_t *dip, dev_info_t *nextdip) 4733 { 4734 DEVI(dip)->devi_next = DEVI(nextdip); 4735 } 4736 4737 /* 4738 * ddi_root_node: Return root node of devinfo tree 4739 */ 4740 4741 dev_info_t * 4742 ddi_root_node(void) 4743 { 4744 extern dev_info_t *top_devinfo; 4745 4746 return (top_devinfo); 4747 } 4748 4749 /* 4750 * Miscellaneous functions: 4751 */ 4752 4753 /* 4754 * Implementation specific hooks 4755 */ 4756 4757 void 4758 ddi_report_dev(dev_info_t *d) 4759 { 4760 char *b; 4761 4762 (void) ddi_ctlops(d, d, DDI_CTLOPS_REPORTDEV, (void *)0, (void *)0); 4763 4764 /* 4765 * If this devinfo node has cb_ops, it's implicitly accessible from 4766 * userland, so we print its full name together with the instance 4767 * number 'abbreviation' that the driver may use internally. 4768 */ 4769 if (DEVI(d)->devi_ops->devo_cb_ops != (struct cb_ops *)0 && 4770 (b = kmem_zalloc(MAXPATHLEN, KM_NOSLEEP))) { 4771 cmn_err(CE_CONT, "?%s%d is %s\n", 4772 ddi_driver_name(d), ddi_get_instance(d), 4773 ddi_pathname(d, b)); 4774 kmem_free(b, MAXPATHLEN); 4775 } 4776 } 4777 4778 /* 4779 * ddi_ctlops() is described in the assembler not to buy a new register 4780 * window when it's called and can reduce cost in climbing the device tree 4781 * without using the tail call optimization. 4782 */ 4783 int 4784 ddi_dev_regsize(dev_info_t *dev, uint_t rnumber, off_t *result) 4785 { 4786 int ret; 4787 4788 ret = ddi_ctlops(dev, dev, DDI_CTLOPS_REGSIZE, 4789 (void *)&rnumber, (void *)result); 4790 4791 return (ret == DDI_SUCCESS ? DDI_SUCCESS : DDI_FAILURE); 4792 } 4793 4794 int 4795 ddi_dev_nregs(dev_info_t *dev, int *result) 4796 { 4797 return (ddi_ctlops(dev, dev, DDI_CTLOPS_NREGS, 0, (void *)result)); 4798 } 4799 4800 int 4801 ddi_dev_is_sid(dev_info_t *d) 4802 { 4803 return (ddi_ctlops(d, d, DDI_CTLOPS_SIDDEV, (void *)0, (void *)0)); 4804 } 4805 4806 int 4807 ddi_slaveonly(dev_info_t *d) 4808 { 4809 return (ddi_ctlops(d, d, DDI_CTLOPS_SLAVEONLY, (void *)0, (void *)0)); 4810 } 4811 4812 int 4813 ddi_dev_affinity(dev_info_t *a, dev_info_t *b) 4814 { 4815 return (ddi_ctlops(a, a, DDI_CTLOPS_AFFINITY, (void *)b, (void *)0)); 4816 } 4817 4818 int 4819 ddi_streams_driver(dev_info_t *dip) 4820 { 4821 if (i_ddi_devi_attached(dip) && 4822 (DEVI(dip)->devi_ops->devo_cb_ops != NULL) && 4823 (DEVI(dip)->devi_ops->devo_cb_ops->cb_str != NULL)) 4824 return (DDI_SUCCESS); 4825 return (DDI_FAILURE); 4826 } 4827 4828 /* 4829 * callback free list 4830 */ 4831 4832 static int ncallbacks; 4833 static int nc_low = 170; 4834 static int nc_med = 512; 4835 static int nc_high = 2048; 4836 static struct ddi_callback *callbackq; 4837 static struct ddi_callback *callbackqfree; 4838 4839 /* 4840 * set/run callback lists 4841 */ 4842 struct cbstats { 4843 kstat_named_t cb_asked; 4844 kstat_named_t cb_new; 4845 kstat_named_t cb_run; 4846 kstat_named_t cb_delete; 4847 kstat_named_t cb_maxreq; 4848 kstat_named_t cb_maxlist; 4849 kstat_named_t cb_alloc; 4850 kstat_named_t cb_runouts; 4851 kstat_named_t cb_L2; 4852 kstat_named_t cb_grow; 4853 } cbstats = { 4854 {"asked", KSTAT_DATA_UINT32}, 4855 {"new", KSTAT_DATA_UINT32}, 4856 {"run", KSTAT_DATA_UINT32}, 4857 {"delete", KSTAT_DATA_UINT32}, 4858 {"maxreq", KSTAT_DATA_UINT32}, 4859 {"maxlist", KSTAT_DATA_UINT32}, 4860 {"alloc", KSTAT_DATA_UINT32}, 4861 {"runouts", KSTAT_DATA_UINT32}, 4862 {"L2", KSTAT_DATA_UINT32}, 4863 {"grow", KSTAT_DATA_UINT32}, 4864 }; 4865 4866 #define nc_asked cb_asked.value.ui32 4867 #define nc_new cb_new.value.ui32 4868 #define nc_run cb_run.value.ui32 4869 #define nc_delete cb_delete.value.ui32 4870 #define nc_maxreq cb_maxreq.value.ui32 4871 #define nc_maxlist cb_maxlist.value.ui32 4872 #define nc_alloc cb_alloc.value.ui32 4873 #define nc_runouts cb_runouts.value.ui32 4874 #define nc_L2 cb_L2.value.ui32 4875 #define nc_grow cb_grow.value.ui32 4876 4877 static kmutex_t ddi_callback_mutex; 4878 4879 /* 4880 * callbacks are handled using a L1/L2 cache. The L1 cache 4881 * comes out of kmem_cache_alloc and can expand/shrink dynamically. If 4882 * we can't get callbacks from the L1 cache [because pageout is doing 4883 * I/O at the time freemem is 0], we allocate callbacks out of the 4884 * L2 cache. The L2 cache is static and depends on the memory size. 4885 * [We might also count the number of devices at probe time and 4886 * allocate one structure per device and adjust for deferred attach] 4887 */ 4888 void 4889 impl_ddi_callback_init(void) 4890 { 4891 int i; 4892 uint_t physmegs; 4893 kstat_t *ksp; 4894 4895 physmegs = physmem >> (20 - PAGESHIFT); 4896 if (physmegs < 48) { 4897 ncallbacks = nc_low; 4898 } else if (physmegs < 128) { 4899 ncallbacks = nc_med; 4900 } else { 4901 ncallbacks = nc_high; 4902 } 4903 4904 /* 4905 * init free list 4906 */ 4907 callbackq = kmem_zalloc( 4908 ncallbacks * sizeof (struct ddi_callback), KM_SLEEP); 4909 for (i = 0; i < ncallbacks-1; i++) 4910 callbackq[i].c_nfree = &callbackq[i+1]; 4911 callbackqfree = callbackq; 4912 4913 /* init kstats */ 4914 if (ksp = kstat_create("unix", 0, "cbstats", "misc", KSTAT_TYPE_NAMED, 4915 sizeof (cbstats) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL)) { 4916 ksp->ks_data = (void *) &cbstats; 4917 kstat_install(ksp); 4918 } 4919 4920 } 4921 4922 static void 4923 callback_insert(int (*funcp)(caddr_t), caddr_t arg, uintptr_t *listid, 4924 int count) 4925 { 4926 struct ddi_callback *list, *marker, *new; 4927 size_t size = sizeof (struct ddi_callback); 4928 4929 list = marker = (struct ddi_callback *)*listid; 4930 while (list != NULL) { 4931 if (list->c_call == funcp && list->c_arg == arg) { 4932 list->c_count += count; 4933 return; 4934 } 4935 marker = list; 4936 list = list->c_nlist; 4937 } 4938 new = kmem_alloc(size, KM_NOSLEEP); 4939 if (new == NULL) { 4940 new = callbackqfree; 4941 if (new == NULL) { 4942 new = kmem_alloc_tryhard(sizeof (struct ddi_callback), 4943 &size, KM_NOSLEEP | KM_PANIC); 4944 cbstats.nc_grow++; 4945 } else { 4946 callbackqfree = new->c_nfree; 4947 cbstats.nc_L2++; 4948 } 4949 } 4950 if (marker != NULL) { 4951 marker->c_nlist = new; 4952 } else { 4953 *listid = (uintptr_t)new; 4954 } 4955 new->c_size = size; 4956 new->c_nlist = NULL; 4957 new->c_call = funcp; 4958 new->c_arg = arg; 4959 new->c_count = count; 4960 cbstats.nc_new++; 4961 cbstats.nc_alloc++; 4962 if (cbstats.nc_alloc > cbstats.nc_maxlist) 4963 cbstats.nc_maxlist = cbstats.nc_alloc; 4964 } 4965 4966 void 4967 ddi_set_callback(int (*funcp)(caddr_t), caddr_t arg, uintptr_t *listid) 4968 { 4969 mutex_enter(&ddi_callback_mutex); 4970 cbstats.nc_asked++; 4971 if ((cbstats.nc_asked - cbstats.nc_run) > cbstats.nc_maxreq) 4972 cbstats.nc_maxreq = (cbstats.nc_asked - cbstats.nc_run); 4973 (void) callback_insert(funcp, arg, listid, 1); 4974 mutex_exit(&ddi_callback_mutex); 4975 } 4976 4977 static void 4978 real_callback_run(void *Queue) 4979 { 4980 int (*funcp)(caddr_t); 4981 caddr_t arg; 4982 int count, rval; 4983 uintptr_t *listid; 4984 struct ddi_callback *list, *marker; 4985 int check_pending = 1; 4986 int pending = 0; 4987 4988 do { 4989 mutex_enter(&ddi_callback_mutex); 4990 listid = Queue; 4991 list = (struct ddi_callback *)*listid; 4992 if (list == NULL) { 4993 mutex_exit(&ddi_callback_mutex); 4994 return; 4995 } 4996 if (check_pending) { 4997 marker = list; 4998 while (marker != NULL) { 4999 pending += marker->c_count; 5000 marker = marker->c_nlist; 5001 } 5002 check_pending = 0; 5003 } 5004 ASSERT(pending > 0); 5005 ASSERT(list->c_count > 0); 5006 funcp = list->c_call; 5007 arg = list->c_arg; 5008 count = list->c_count; 5009 *(uintptr_t *)Queue = (uintptr_t)list->c_nlist; 5010 if (list >= &callbackq[0] && 5011 list <= &callbackq[ncallbacks-1]) { 5012 list->c_nfree = callbackqfree; 5013 callbackqfree = list; 5014 } else 5015 kmem_free(list, list->c_size); 5016 5017 cbstats.nc_delete++; 5018 cbstats.nc_alloc--; 5019 mutex_exit(&ddi_callback_mutex); 5020 5021 do { 5022 if ((rval = (*funcp)(arg)) == 0) { 5023 pending -= count; 5024 mutex_enter(&ddi_callback_mutex); 5025 (void) callback_insert(funcp, arg, listid, 5026 count); 5027 cbstats.nc_runouts++; 5028 } else { 5029 pending--; 5030 mutex_enter(&ddi_callback_mutex); 5031 cbstats.nc_run++; 5032 } 5033 mutex_exit(&ddi_callback_mutex); 5034 } while (rval != 0 && (--count > 0)); 5035 } while (pending > 0); 5036 } 5037 5038 void 5039 ddi_run_callback(uintptr_t *listid) 5040 { 5041 softcall(real_callback_run, listid); 5042 } 5043 5044 /* 5045 * ddi_periodic_t 5046 * ddi_periodic_add(void (*func)(void *), void *arg, hrtime_t interval, 5047 * int level) 5048 * 5049 * INTERFACE LEVEL 5050 * Solaris DDI specific (Solaris DDI) 5051 * 5052 * PARAMETERS 5053 * func: the callback function 5054 * 5055 * The callback function will be invoked. The function is invoked 5056 * in kernel context if the argument level passed is the zero. 5057 * Otherwise it's invoked in interrupt context at the specified 5058 * level. 5059 * 5060 * arg: the argument passed to the callback function 5061 * 5062 * interval: interval time 5063 * 5064 * level : callback interrupt level 5065 * 5066 * If the value is the zero, the callback function is invoked 5067 * in kernel context. If the value is more than the zero, but 5068 * less than or equal to ten, the callback function is invoked in 5069 * interrupt context at the specified interrupt level, which may 5070 * be used for real time applications. 5071 * 5072 * This value must be in range of 0-10, which can be a numeric 5073 * number or a pre-defined macro (DDI_IPL_0, ... , DDI_IPL_10). 5074 * 5075 * DESCRIPTION 5076 * ddi_periodic_add(9F) schedules the specified function to be 5077 * periodically invoked in the interval time. 5078 * 5079 * As well as timeout(9F), the exact time interval over which the function 5080 * takes effect cannot be guaranteed, but the value given is a close 5081 * approximation. 5082 * 5083 * Drivers waiting on behalf of processes with real-time constraints must 5084 * pass non-zero value with the level argument to ddi_periodic_add(9F). 5085 * 5086 * RETURN VALUES 5087 * ddi_periodic_add(9F) returns a non-zero opaque value (ddi_periodic_t), 5088 * which must be used for ddi_periodic_delete(9F) to specify the request. 5089 * 5090 * CONTEXT 5091 * ddi_periodic_add(9F) can be called in user or kernel context, but 5092 * it cannot be called in interrupt context, which is different from 5093 * timeout(9F). 5094 */ 5095 ddi_periodic_t 5096 ddi_periodic_add(void (*func)(void *), void *arg, hrtime_t interval, int level) 5097 { 5098 /* 5099 * Sanity check of the argument level. 5100 */ 5101 if (level < DDI_IPL_0 || level > DDI_IPL_10) 5102 cmn_err(CE_PANIC, 5103 "ddi_periodic_add: invalid interrupt level (%d).", level); 5104 5105 /* 5106 * Sanity check of the context. ddi_periodic_add() cannot be 5107 * called in either interrupt context or high interrupt context. 5108 */ 5109 if (servicing_interrupt()) 5110 cmn_err(CE_PANIC, 5111 "ddi_periodic_add: called in (high) interrupt context."); 5112 5113 return ((ddi_periodic_t)i_timeout(func, arg, interval, level)); 5114 } 5115 5116 /* 5117 * void 5118 * ddi_periodic_delete(ddi_periodic_t req) 5119 * 5120 * INTERFACE LEVEL 5121 * Solaris DDI specific (Solaris DDI) 5122 * 5123 * PARAMETERS 5124 * req: ddi_periodic_t opaque value ddi_periodic_add(9F) returned 5125 * previously. 5126 * 5127 * DESCRIPTION 5128 * ddi_periodic_delete(9F) cancels the ddi_periodic_add(9F) request 5129 * previously requested. 5130 * 5131 * ddi_periodic_delete(9F) will not return until the pending request 5132 * is canceled or executed. 5133 * 5134 * As well as untimeout(9F), calling ddi_periodic_delete(9F) for a 5135 * timeout which is either running on another CPU, or has already 5136 * completed causes no problems. However, unlike untimeout(9F), there is 5137 * no restrictions on the lock which might be held across the call to 5138 * ddi_periodic_delete(9F). 5139 * 5140 * Drivers should be structured with the understanding that the arrival of 5141 * both an interrupt and a timeout for that interrupt can occasionally 5142 * occur, in either order. 5143 * 5144 * CONTEXT 5145 * ddi_periodic_delete(9F) can be called in user or kernel context, but 5146 * it cannot be called in interrupt context, which is different from 5147 * untimeout(9F). 5148 */ 5149 void 5150 ddi_periodic_delete(ddi_periodic_t req) 5151 { 5152 /* 5153 * Sanity check of the context. ddi_periodic_delete() cannot be 5154 * called in either interrupt context or high interrupt context. 5155 */ 5156 if (servicing_interrupt()) 5157 cmn_err(CE_PANIC, 5158 "ddi_periodic_delete: called in (high) interrupt context."); 5159 5160 i_untimeout((timeout_t)req); 5161 } 5162 5163 dev_info_t * 5164 nodevinfo(dev_t dev, int otyp) 5165 { 5166 _NOTE(ARGUNUSED(dev, otyp)) 5167 return ((dev_info_t *)0); 5168 } 5169 5170 /* 5171 * A driver should support its own getinfo(9E) entry point. This function 5172 * is provided as a convenience for ON drivers that don't expect their 5173 * getinfo(9E) entry point to be called. A driver that uses this must not 5174 * call ddi_create_minor_node. 5175 */ 5176 int 5177 ddi_no_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 5178 { 5179 _NOTE(ARGUNUSED(dip, infocmd, arg, result)) 5180 return (DDI_FAILURE); 5181 } 5182 5183 /* 5184 * A driver should support its own getinfo(9E) entry point. This function 5185 * is provided as a convenience for ON drivers that where the minor number 5186 * is the instance. Drivers that do not have 1:1 mapping must implement 5187 * their own getinfo(9E) function. 5188 */ 5189 int 5190 ddi_getinfo_1to1(dev_info_t *dip, ddi_info_cmd_t infocmd, 5191 void *arg, void **result) 5192 { 5193 _NOTE(ARGUNUSED(dip)) 5194 int instance; 5195 5196 if (infocmd != DDI_INFO_DEVT2INSTANCE) 5197 return (DDI_FAILURE); 5198 5199 instance = getminor((dev_t)(uintptr_t)arg); 5200 *result = (void *)(uintptr_t)instance; 5201 return (DDI_SUCCESS); 5202 } 5203 5204 int 5205 ddifail(dev_info_t *devi, ddi_attach_cmd_t cmd) 5206 { 5207 _NOTE(ARGUNUSED(devi, cmd)) 5208 return (DDI_FAILURE); 5209 } 5210 5211 int 5212 ddi_no_dma_map(dev_info_t *dip, dev_info_t *rdip, 5213 struct ddi_dma_req *dmareqp, ddi_dma_handle_t *handlep) 5214 { 5215 _NOTE(ARGUNUSED(dip, rdip, dmareqp, handlep)) 5216 return (DDI_DMA_NOMAPPING); 5217 } 5218 5219 int 5220 ddi_no_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *attr, 5221 int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep) 5222 { 5223 _NOTE(ARGUNUSED(dip, rdip, attr, waitfp, arg, handlep)) 5224 return (DDI_DMA_BADATTR); 5225 } 5226 5227 int 5228 ddi_no_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, 5229 ddi_dma_handle_t handle) 5230 { 5231 _NOTE(ARGUNUSED(dip, rdip, handle)) 5232 return (DDI_FAILURE); 5233 } 5234 5235 int 5236 ddi_no_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 5237 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 5238 ddi_dma_cookie_t *cp, uint_t *ccountp) 5239 { 5240 _NOTE(ARGUNUSED(dip, rdip, handle, dmareq, cp, ccountp)) 5241 return (DDI_DMA_NOMAPPING); 5242 } 5243 5244 int 5245 ddi_no_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 5246 ddi_dma_handle_t handle) 5247 { 5248 _NOTE(ARGUNUSED(dip, rdip, handle)) 5249 return (DDI_FAILURE); 5250 } 5251 5252 int 5253 ddi_no_dma_flush(dev_info_t *dip, dev_info_t *rdip, 5254 ddi_dma_handle_t handle, off_t off, size_t len, 5255 uint_t cache_flags) 5256 { 5257 _NOTE(ARGUNUSED(dip, rdip, handle, off, len, cache_flags)) 5258 return (DDI_FAILURE); 5259 } 5260 5261 int 5262 ddi_no_dma_win(dev_info_t *dip, dev_info_t *rdip, 5263 ddi_dma_handle_t handle, uint_t win, off_t *offp, 5264 size_t *lenp, ddi_dma_cookie_t *cookiep, uint_t *ccountp) 5265 { 5266 _NOTE(ARGUNUSED(dip, rdip, handle, win, offp, lenp, cookiep, ccountp)) 5267 return (DDI_FAILURE); 5268 } 5269 5270 int 5271 ddi_no_dma_mctl(dev_info_t *dip, dev_info_t *rdip, 5272 ddi_dma_handle_t handle, enum ddi_dma_ctlops request, 5273 off_t *offp, size_t *lenp, caddr_t *objp, uint_t flags) 5274 { 5275 _NOTE(ARGUNUSED(dip, rdip, handle, request, offp, lenp, objp, flags)) 5276 return (DDI_FAILURE); 5277 } 5278 5279 void 5280 ddivoid(void) 5281 {} 5282 5283 int 5284 nochpoll(dev_t dev, short events, int anyyet, short *reventsp, 5285 struct pollhead **pollhdrp) 5286 { 5287 _NOTE(ARGUNUSED(dev, events, anyyet, reventsp, pollhdrp)) 5288 return (ENXIO); 5289 } 5290 5291 cred_t * 5292 ddi_get_cred(void) 5293 { 5294 return (CRED()); 5295 } 5296 5297 clock_t 5298 ddi_get_lbolt(void) 5299 { 5300 return ((clock_t)lbolt_hybrid()); 5301 } 5302 5303 int64_t 5304 ddi_get_lbolt64(void) 5305 { 5306 return (lbolt_hybrid()); 5307 } 5308 5309 time_t 5310 ddi_get_time(void) 5311 { 5312 time_t now; 5313 5314 if ((now = gethrestime_sec()) == 0) { 5315 timestruc_t ts; 5316 mutex_enter(&tod_lock); 5317 ts = tod_get(); 5318 mutex_exit(&tod_lock); 5319 return (ts.tv_sec); 5320 } else { 5321 return (now); 5322 } 5323 } 5324 5325 pid_t 5326 ddi_get_pid(void) 5327 { 5328 return (ttoproc(curthread)->p_pid); 5329 } 5330 5331 kt_did_t 5332 ddi_get_kt_did(void) 5333 { 5334 return (curthread->t_did); 5335 } 5336 5337 /* 5338 * This function returns B_TRUE if the caller can reasonably expect that a call 5339 * to cv_wait_sig(9F), cv_timedwait_sig(9F), or qwait_sig(9F) could be awakened 5340 * by user-level signal. If it returns B_FALSE, then the caller should use 5341 * other means to make certain that the wait will not hang "forever." 5342 * 5343 * It does not check the signal mask, nor for reception of any particular 5344 * signal. 5345 * 5346 * Currently, a thread can receive a signal if it's not a kernel thread and it 5347 * is not in the middle of exit(2) tear-down. Threads that are in that 5348 * tear-down effectively convert cv_wait_sig to cv_wait, cv_timedwait_sig to 5349 * cv_timedwait, and qwait_sig to qwait. 5350 */ 5351 boolean_t 5352 ddi_can_receive_sig(void) 5353 { 5354 proc_t *pp; 5355 5356 if (curthread->t_proc_flag & TP_LWPEXIT) 5357 return (B_FALSE); 5358 if ((pp = ttoproc(curthread)) == NULL) 5359 return (B_FALSE); 5360 return (pp->p_as != &kas); 5361 } 5362 5363 /* 5364 * Swap bytes in 16-bit [half-]words 5365 */ 5366 void 5367 swab(void *src, void *dst, size_t nbytes) 5368 { 5369 uchar_t *pf = (uchar_t *)src; 5370 uchar_t *pt = (uchar_t *)dst; 5371 uchar_t tmp; 5372 int nshorts; 5373 5374 nshorts = nbytes >> 1; 5375 5376 while (--nshorts >= 0) { 5377 tmp = *pf++; 5378 *pt++ = *pf++; 5379 *pt++ = tmp; 5380 } 5381 } 5382 5383 static void 5384 ddi_append_minor_node(dev_info_t *ddip, struct ddi_minor_data *dmdp) 5385 { 5386 int circ; 5387 struct ddi_minor_data *dp; 5388 5389 ndi_devi_enter(ddip, &circ); 5390 if ((dp = DEVI(ddip)->devi_minor) == (struct ddi_minor_data *)NULL) { 5391 DEVI(ddip)->devi_minor = dmdp; 5392 } else { 5393 while (dp->next != (struct ddi_minor_data *)NULL) 5394 dp = dp->next; 5395 dp->next = dmdp; 5396 } 5397 ndi_devi_exit(ddip, circ); 5398 } 5399 5400 /* 5401 * Part of the obsolete SunCluster DDI Hooks. 5402 * Keep for binary compatibility 5403 */ 5404 minor_t 5405 ddi_getiminor(dev_t dev) 5406 { 5407 return (getminor(dev)); 5408 } 5409 5410 static int 5411 i_log_devfs_minor_create(dev_info_t *dip, char *minor_name) 5412 { 5413 int se_flag; 5414 int kmem_flag; 5415 int se_err; 5416 char *pathname, *class_name; 5417 sysevent_t *ev = NULL; 5418 sysevent_id_t eid; 5419 sysevent_value_t se_val; 5420 sysevent_attr_list_t *ev_attr_list = NULL; 5421 5422 /* determine interrupt context */ 5423 se_flag = (servicing_interrupt()) ? SE_NOSLEEP : SE_SLEEP; 5424 kmem_flag = (se_flag == SE_SLEEP) ? KM_SLEEP : KM_NOSLEEP; 5425 5426 i_ddi_di_cache_invalidate(); 5427 5428 #ifdef DEBUG 5429 if ((se_flag == SE_NOSLEEP) && sunddi_debug) { 5430 cmn_err(CE_CONT, "ddi_create_minor_node: called from " 5431 "interrupt level by driver %s", 5432 ddi_driver_name(dip)); 5433 } 5434 #endif /* DEBUG */ 5435 5436 ev = sysevent_alloc(EC_DEVFS, ESC_DEVFS_MINOR_CREATE, EP_DDI, se_flag); 5437 if (ev == NULL) { 5438 goto fail; 5439 } 5440 5441 pathname = kmem_alloc(MAXPATHLEN, kmem_flag); 5442 if (pathname == NULL) { 5443 sysevent_free(ev); 5444 goto fail; 5445 } 5446 5447 (void) ddi_pathname(dip, pathname); 5448 ASSERT(strlen(pathname)); 5449 se_val.value_type = SE_DATA_TYPE_STRING; 5450 se_val.value.sv_string = pathname; 5451 if (sysevent_add_attr(&ev_attr_list, DEVFS_PATHNAME, 5452 &se_val, se_flag) != 0) { 5453 kmem_free(pathname, MAXPATHLEN); 5454 sysevent_free(ev); 5455 goto fail; 5456 } 5457 kmem_free(pathname, MAXPATHLEN); 5458 5459 /* add the device class attribute */ 5460 if ((class_name = i_ddi_devi_class(dip)) != NULL) { 5461 se_val.value_type = SE_DATA_TYPE_STRING; 5462 se_val.value.sv_string = class_name; 5463 if (sysevent_add_attr(&ev_attr_list, 5464 DEVFS_DEVI_CLASS, &se_val, SE_SLEEP) != 0) { 5465 sysevent_free_attr(ev_attr_list); 5466 goto fail; 5467 } 5468 } 5469 5470 /* 5471 * allow for NULL minor names 5472 */ 5473 if (minor_name != NULL) { 5474 se_val.value.sv_string = minor_name; 5475 if (sysevent_add_attr(&ev_attr_list, DEVFS_MINOR_NAME, 5476 &se_val, se_flag) != 0) { 5477 sysevent_free_attr(ev_attr_list); 5478 sysevent_free(ev); 5479 goto fail; 5480 } 5481 } 5482 5483 if (sysevent_attach_attributes(ev, ev_attr_list) != 0) { 5484 sysevent_free_attr(ev_attr_list); 5485 sysevent_free(ev); 5486 goto fail; 5487 } 5488 5489 if ((se_err = log_sysevent(ev, se_flag, &eid)) != 0) { 5490 if (se_err == SE_NO_TRANSPORT) { 5491 cmn_err(CE_WARN, "/devices or /dev may not be current " 5492 "for driver %s (%s). Run devfsadm -i %s", 5493 ddi_driver_name(dip), "syseventd not responding", 5494 ddi_driver_name(dip)); 5495 } else { 5496 sysevent_free(ev); 5497 goto fail; 5498 } 5499 } 5500 5501 sysevent_free(ev); 5502 return (DDI_SUCCESS); 5503 fail: 5504 cmn_err(CE_WARN, "/devices or /dev may not be current " 5505 "for driver %s. Run devfsadm -i %s", 5506 ddi_driver_name(dip), ddi_driver_name(dip)); 5507 return (DDI_SUCCESS); 5508 } 5509 5510 /* 5511 * failing to remove a minor node is not of interest 5512 * therefore we do not generate an error message 5513 */ 5514 static int 5515 i_log_devfs_minor_remove(dev_info_t *dip, char *minor_name) 5516 { 5517 char *pathname, *class_name; 5518 sysevent_t *ev; 5519 sysevent_id_t eid; 5520 sysevent_value_t se_val; 5521 sysevent_attr_list_t *ev_attr_list = NULL; 5522 5523 /* 5524 * only log ddi_remove_minor_node() calls outside the scope 5525 * of attach/detach reconfigurations and when the dip is 5526 * still initialized. 5527 */ 5528 if (DEVI_IS_ATTACHING(dip) || DEVI_IS_DETACHING(dip) || 5529 (i_ddi_node_state(dip) < DS_INITIALIZED)) { 5530 return (DDI_SUCCESS); 5531 } 5532 5533 i_ddi_di_cache_invalidate(); 5534 5535 ev = sysevent_alloc(EC_DEVFS, ESC_DEVFS_MINOR_REMOVE, EP_DDI, SE_SLEEP); 5536 if (ev == NULL) { 5537 return (DDI_SUCCESS); 5538 } 5539 5540 pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5541 if (pathname == NULL) { 5542 sysevent_free(ev); 5543 return (DDI_SUCCESS); 5544 } 5545 5546 (void) ddi_pathname(dip, pathname); 5547 ASSERT(strlen(pathname)); 5548 se_val.value_type = SE_DATA_TYPE_STRING; 5549 se_val.value.sv_string = pathname; 5550 if (sysevent_add_attr(&ev_attr_list, DEVFS_PATHNAME, 5551 &se_val, SE_SLEEP) != 0) { 5552 kmem_free(pathname, MAXPATHLEN); 5553 sysevent_free(ev); 5554 return (DDI_SUCCESS); 5555 } 5556 5557 kmem_free(pathname, MAXPATHLEN); 5558 5559 /* 5560 * allow for NULL minor names 5561 */ 5562 if (minor_name != NULL) { 5563 se_val.value.sv_string = minor_name; 5564 if (sysevent_add_attr(&ev_attr_list, DEVFS_MINOR_NAME, 5565 &se_val, SE_SLEEP) != 0) { 5566 sysevent_free_attr(ev_attr_list); 5567 goto fail; 5568 } 5569 } 5570 5571 if ((class_name = i_ddi_devi_class(dip)) != NULL) { 5572 /* add the device class, driver name and instance attributes */ 5573 5574 se_val.value_type = SE_DATA_TYPE_STRING; 5575 se_val.value.sv_string = class_name; 5576 if (sysevent_add_attr(&ev_attr_list, 5577 DEVFS_DEVI_CLASS, &se_val, SE_SLEEP) != 0) { 5578 sysevent_free_attr(ev_attr_list); 5579 goto fail; 5580 } 5581 5582 se_val.value_type = SE_DATA_TYPE_STRING; 5583 se_val.value.sv_string = (char *)ddi_driver_name(dip); 5584 if (sysevent_add_attr(&ev_attr_list, 5585 DEVFS_DRIVER_NAME, &se_val, SE_SLEEP) != 0) { 5586 sysevent_free_attr(ev_attr_list); 5587 goto fail; 5588 } 5589 5590 se_val.value_type = SE_DATA_TYPE_INT32; 5591 se_val.value.sv_int32 = ddi_get_instance(dip); 5592 if (sysevent_add_attr(&ev_attr_list, 5593 DEVFS_INSTANCE, &se_val, SE_SLEEP) != 0) { 5594 sysevent_free_attr(ev_attr_list); 5595 goto fail; 5596 } 5597 5598 } 5599 5600 if (sysevent_attach_attributes(ev, ev_attr_list) != 0) { 5601 sysevent_free_attr(ev_attr_list); 5602 } else { 5603 (void) log_sysevent(ev, SE_SLEEP, &eid); 5604 } 5605 fail: 5606 sysevent_free(ev); 5607 return (DDI_SUCCESS); 5608 } 5609 5610 /* 5611 * Derive the device class of the node. 5612 * Device class names aren't defined yet. Until this is done we use 5613 * devfs event subclass names as device class names. 5614 */ 5615 static int 5616 derive_devi_class(dev_info_t *dip, char *node_type, int flag) 5617 { 5618 int rv = DDI_SUCCESS; 5619 5620 if (i_ddi_devi_class(dip) == NULL) { 5621 if (strncmp(node_type, DDI_NT_BLOCK, 5622 sizeof (DDI_NT_BLOCK) - 1) == 0 && 5623 (node_type[sizeof (DDI_NT_BLOCK) - 1] == '\0' || 5624 node_type[sizeof (DDI_NT_BLOCK) - 1] == ':') && 5625 strcmp(node_type, DDI_NT_FD) != 0) { 5626 5627 rv = i_ddi_set_devi_class(dip, ESC_DISK, flag); 5628 5629 } else if (strncmp(node_type, DDI_NT_NET, 5630 sizeof (DDI_NT_NET) - 1) == 0 && 5631 (node_type[sizeof (DDI_NT_NET) - 1] == '\0' || 5632 node_type[sizeof (DDI_NT_NET) - 1] == ':')) { 5633 5634 rv = i_ddi_set_devi_class(dip, ESC_NETWORK, flag); 5635 5636 } else if (strncmp(node_type, DDI_NT_PRINTER, 5637 sizeof (DDI_NT_PRINTER) - 1) == 0 && 5638 (node_type[sizeof (DDI_NT_PRINTER) - 1] == '\0' || 5639 node_type[sizeof (DDI_NT_PRINTER) - 1] == ':')) { 5640 5641 rv = i_ddi_set_devi_class(dip, ESC_PRINTER, flag); 5642 5643 } else if (strncmp(node_type, DDI_PSEUDO, 5644 sizeof (DDI_PSEUDO) -1) == 0 && 5645 (strncmp(ESC_LOFI, ddi_node_name(dip), 5646 sizeof (ESC_LOFI) -1) == 0)) { 5647 rv = i_ddi_set_devi_class(dip, ESC_LOFI, flag); 5648 } 5649 } 5650 5651 return (rv); 5652 } 5653 5654 /* 5655 * Check compliance with PSARC 2003/375: 5656 * 5657 * The name must contain only characters a-z, A-Z, 0-9 or _ and it must not 5658 * exceed IFNAMSIZ (16) characters in length. 5659 */ 5660 static boolean_t 5661 verify_name(char *name) 5662 { 5663 size_t len = strlen(name); 5664 char *cp; 5665 5666 if (len == 0 || len > IFNAMSIZ) 5667 return (B_FALSE); 5668 5669 for (cp = name; *cp != '\0'; cp++) { 5670 if (!isalnum(*cp) && *cp != '_') 5671 return (B_FALSE); 5672 } 5673 5674 return (B_TRUE); 5675 } 5676 5677 /* 5678 * ddi_create_minor_common: Create a ddi_minor_data structure and 5679 * attach it to the given devinfo node. 5680 */ 5681 5682 int 5683 ddi_create_minor_common(dev_info_t *dip, char *name, int spec_type, 5684 minor_t minor_num, char *node_type, int flag, ddi_minor_type mtype, 5685 const char *read_priv, const char *write_priv, mode_t priv_mode) 5686 { 5687 struct ddi_minor_data *dmdp; 5688 major_t major; 5689 5690 if (spec_type != S_IFCHR && spec_type != S_IFBLK) 5691 return (DDI_FAILURE); 5692 5693 if (name == NULL) 5694 return (DDI_FAILURE); 5695 5696 /* 5697 * Log a message if the minor number the driver is creating 5698 * is not expressible on the on-disk filesystem (currently 5699 * this is limited to 18 bits both by UFS). The device can 5700 * be opened via devfs, but not by device special files created 5701 * via mknod(). 5702 */ 5703 if (minor_num > L_MAXMIN32) { 5704 cmn_err(CE_WARN, 5705 "%s%d:%s minor 0x%x too big for 32-bit applications", 5706 ddi_driver_name(dip), ddi_get_instance(dip), 5707 name, minor_num); 5708 return (DDI_FAILURE); 5709 } 5710 5711 /* dip must be bound and attached */ 5712 major = ddi_driver_major(dip); 5713 ASSERT(major != DDI_MAJOR_T_NONE); 5714 5715 /* 5716 * Default node_type to DDI_PSEUDO and issue notice in debug mode 5717 */ 5718 if (node_type == NULL) { 5719 node_type = DDI_PSEUDO; 5720 NDI_CONFIG_DEBUG((CE_NOTE, "!illegal node_type NULL for %s%d " 5721 " minor node %s; default to DDI_PSEUDO", 5722 ddi_driver_name(dip), ddi_get_instance(dip), name)); 5723 } 5724 5725 /* 5726 * If the driver is a network driver, ensure that the name falls within 5727 * the interface naming constraints specified by PSARC/2003/375. 5728 */ 5729 if (strcmp(node_type, DDI_NT_NET) == 0) { 5730 if (!verify_name(name)) 5731 return (DDI_FAILURE); 5732 5733 if (mtype == DDM_MINOR) { 5734 struct devnames *dnp = &devnamesp[major]; 5735 5736 /* Mark driver as a network driver */ 5737 LOCK_DEV_OPS(&dnp->dn_lock); 5738 dnp->dn_flags |= DN_NETWORK_DRIVER; 5739 5740 /* 5741 * If this minor node is created during the device 5742 * attachment, this is a physical network device. 5743 * Mark the driver as a physical network driver. 5744 */ 5745 if (DEVI_IS_ATTACHING(dip)) 5746 dnp->dn_flags |= DN_NETWORK_PHYSDRIVER; 5747 UNLOCK_DEV_OPS(&dnp->dn_lock); 5748 } 5749 } 5750 5751 if (mtype == DDM_MINOR) { 5752 if (derive_devi_class(dip, node_type, KM_NOSLEEP) != 5753 DDI_SUCCESS) 5754 return (DDI_FAILURE); 5755 } 5756 5757 /* 5758 * Take care of minor number information for the node. 5759 */ 5760 5761 if ((dmdp = kmem_zalloc(sizeof (struct ddi_minor_data), 5762 KM_NOSLEEP)) == NULL) { 5763 return (DDI_FAILURE); 5764 } 5765 if ((dmdp->ddm_name = i_ddi_strdup(name, KM_NOSLEEP)) == NULL) { 5766 kmem_free(dmdp, sizeof (struct ddi_minor_data)); 5767 return (DDI_FAILURE); 5768 } 5769 dmdp->dip = dip; 5770 dmdp->ddm_dev = makedevice(major, minor_num); 5771 dmdp->ddm_spec_type = spec_type; 5772 dmdp->ddm_node_type = node_type; 5773 dmdp->type = mtype; 5774 if (flag & CLONE_DEV) { 5775 dmdp->type = DDM_ALIAS; 5776 dmdp->ddm_dev = makedevice(ddi_driver_major(clone_dip), major); 5777 } 5778 if (flag & PRIVONLY_DEV) { 5779 dmdp->ddm_flags |= DM_NO_FSPERM; 5780 } 5781 if (read_priv || write_priv) { 5782 dmdp->ddm_node_priv = 5783 devpolicy_priv_by_name(read_priv, write_priv); 5784 } 5785 dmdp->ddm_priv_mode = priv_mode; 5786 5787 ddi_append_minor_node(dip, dmdp); 5788 5789 /* 5790 * only log ddi_create_minor_node() calls which occur 5791 * outside the scope of attach(9e)/detach(9e) reconfigurations 5792 */ 5793 if (!(DEVI_IS_ATTACHING(dip) || DEVI_IS_DETACHING(dip)) && 5794 mtype != DDM_INTERNAL_PATH) { 5795 (void) i_log_devfs_minor_create(dip, name); 5796 } 5797 5798 /* 5799 * Check if any dacf rules match the creation of this minor node 5800 */ 5801 dacfc_match_create_minor(name, node_type, dip, dmdp, flag); 5802 return (DDI_SUCCESS); 5803 } 5804 5805 int 5806 ddi_create_minor_node(dev_info_t *dip, char *name, int spec_type, 5807 minor_t minor_num, char *node_type, int flag) 5808 { 5809 return (ddi_create_minor_common(dip, name, spec_type, minor_num, 5810 node_type, flag, DDM_MINOR, NULL, NULL, 0)); 5811 } 5812 5813 int 5814 ddi_create_priv_minor_node(dev_info_t *dip, char *name, int spec_type, 5815 minor_t minor_num, char *node_type, int flag, 5816 const char *rdpriv, const char *wrpriv, mode_t priv_mode) 5817 { 5818 return (ddi_create_minor_common(dip, name, spec_type, minor_num, 5819 node_type, flag, DDM_MINOR, rdpriv, wrpriv, priv_mode)); 5820 } 5821 5822 int 5823 ddi_create_default_minor_node(dev_info_t *dip, char *name, int spec_type, 5824 minor_t minor_num, char *node_type, int flag) 5825 { 5826 return (ddi_create_minor_common(dip, name, spec_type, minor_num, 5827 node_type, flag, DDM_DEFAULT, NULL, NULL, 0)); 5828 } 5829 5830 /* 5831 * Internal (non-ddi) routine for drivers to export names known 5832 * to the kernel (especially ddi_pathname_to_dev_t and friends) 5833 * but not exported externally to /dev 5834 */ 5835 int 5836 ddi_create_internal_pathname(dev_info_t *dip, char *name, int spec_type, 5837 minor_t minor_num) 5838 { 5839 return (ddi_create_minor_common(dip, name, spec_type, minor_num, 5840 "internal", 0, DDM_INTERNAL_PATH, NULL, NULL, 0)); 5841 } 5842 5843 void 5844 ddi_remove_minor_node(dev_info_t *dip, char *name) 5845 { 5846 int circ; 5847 struct ddi_minor_data *dmdp, *dmdp1; 5848 struct ddi_minor_data **dmdp_prev; 5849 5850 ndi_devi_enter(dip, &circ); 5851 dmdp_prev = &DEVI(dip)->devi_minor; 5852 dmdp = DEVI(dip)->devi_minor; 5853 while (dmdp != NULL) { 5854 dmdp1 = dmdp->next; 5855 if ((name == NULL || (dmdp->ddm_name != NULL && 5856 strcmp(name, dmdp->ddm_name) == 0))) { 5857 if (dmdp->ddm_name != NULL) { 5858 if (dmdp->type != DDM_INTERNAL_PATH) 5859 (void) i_log_devfs_minor_remove(dip, 5860 dmdp->ddm_name); 5861 kmem_free(dmdp->ddm_name, 5862 strlen(dmdp->ddm_name) + 1); 5863 } 5864 /* 5865 * Release device privilege, if any. 5866 * Release dacf client data associated with this minor 5867 * node by storing NULL. 5868 */ 5869 if (dmdp->ddm_node_priv) 5870 dpfree(dmdp->ddm_node_priv); 5871 dacf_store_info((dacf_infohdl_t)dmdp, NULL); 5872 kmem_free(dmdp, sizeof (struct ddi_minor_data)); 5873 *dmdp_prev = dmdp1; 5874 /* 5875 * OK, we found it, so get out now -- if we drive on, 5876 * we will strcmp against garbage. See 1139209. 5877 */ 5878 if (name != NULL) 5879 break; 5880 } else { 5881 dmdp_prev = &dmdp->next; 5882 } 5883 dmdp = dmdp1; 5884 } 5885 ndi_devi_exit(dip, circ); 5886 } 5887 5888 5889 int 5890 ddi_in_panic() 5891 { 5892 return (panicstr != NULL); 5893 } 5894 5895 5896 /* 5897 * Find first bit set in a mask (returned counting from 1 up) 5898 */ 5899 5900 int 5901 ddi_ffs(long mask) 5902 { 5903 return (ffs(mask)); 5904 } 5905 5906 /* 5907 * Find last bit set. Take mask and clear 5908 * all but the most significant bit, and 5909 * then let ffs do the rest of the work. 5910 * 5911 * Algorithm courtesy of Steve Chessin. 5912 */ 5913 5914 int 5915 ddi_fls(long mask) 5916 { 5917 while (mask) { 5918 long nx; 5919 5920 if ((nx = (mask & (mask - 1))) == 0) 5921 break; 5922 mask = nx; 5923 } 5924 return (ffs(mask)); 5925 } 5926 5927 /* 5928 * The ddi_soft_state_* routines comprise generic storage management utilities 5929 * for driver soft state structures (in "the old days," this was done with 5930 * statically sized array - big systems and dynamic loading and unloading 5931 * make heap allocation more attractive). 5932 */ 5933 5934 /* 5935 * Allocate a set of pointers to 'n_items' objects of size 'size' 5936 * bytes. Each pointer is initialized to nil. 5937 * 5938 * The 'size' and 'n_items' values are stashed in the opaque 5939 * handle returned to the caller. 5940 * 5941 * This implementation interprets 'set of pointers' to mean 'array 5942 * of pointers' but note that nothing in the interface definition 5943 * precludes an implementation that uses, for example, a linked list. 5944 * However there should be a small efficiency gain from using an array 5945 * at lookup time. 5946 * 5947 * NOTE As an optimization, we make our growable array allocations in 5948 * powers of two (bytes), since that's how much kmem_alloc (currently) 5949 * gives us anyway. It should save us some free/realloc's .. 5950 * 5951 * As a further optimization, we make the growable array start out 5952 * with MIN_N_ITEMS in it. 5953 */ 5954 5955 #define MIN_N_ITEMS 8 /* 8 void *'s == 32 bytes */ 5956 5957 int 5958 ddi_soft_state_init(void **state_p, size_t size, size_t n_items) 5959 { 5960 i_ddi_soft_state *ss; 5961 5962 if (state_p == NULL || size == 0) 5963 return (EINVAL); 5964 5965 ss = kmem_zalloc(sizeof (*ss), KM_SLEEP); 5966 mutex_init(&ss->lock, NULL, MUTEX_DRIVER, NULL); 5967 ss->size = size; 5968 5969 if (n_items < MIN_N_ITEMS) 5970 ss->n_items = MIN_N_ITEMS; 5971 else { 5972 int bitlog; 5973 5974 if ((bitlog = ddi_fls(n_items)) == ddi_ffs(n_items)) 5975 bitlog--; 5976 ss->n_items = 1 << bitlog; 5977 } 5978 5979 ASSERT(ss->n_items >= n_items); 5980 5981 ss->array = kmem_zalloc(ss->n_items * sizeof (void *), KM_SLEEP); 5982 5983 *state_p = ss; 5984 return (0); 5985 } 5986 5987 /* 5988 * Allocate a state structure of size 'size' to be associated 5989 * with item 'item'. 5990 * 5991 * In this implementation, the array is extended to 5992 * allow the requested offset, if needed. 5993 */ 5994 int 5995 ddi_soft_state_zalloc(void *state, int item) 5996 { 5997 i_ddi_soft_state *ss = (i_ddi_soft_state *)state; 5998 void **array; 5999 void *new_element; 6000 6001 if ((state == NULL) || (item < 0)) 6002 return (DDI_FAILURE); 6003 6004 mutex_enter(&ss->lock); 6005 if (ss->size == 0) { 6006 mutex_exit(&ss->lock); 6007 cmn_err(CE_WARN, "ddi_soft_state_zalloc: bad handle: %s", 6008 mod_containing_pc(caller())); 6009 return (DDI_FAILURE); 6010 } 6011 6012 array = ss->array; /* NULL if ss->n_items == 0 */ 6013 ASSERT(ss->n_items != 0 && array != NULL); 6014 6015 /* 6016 * refuse to tread on an existing element 6017 */ 6018 if (item < ss->n_items && array[item] != NULL) { 6019 mutex_exit(&ss->lock); 6020 return (DDI_FAILURE); 6021 } 6022 6023 /* 6024 * Allocate a new element to plug in 6025 */ 6026 new_element = kmem_zalloc(ss->size, KM_SLEEP); 6027 6028 /* 6029 * Check if the array is big enough, if not, grow it. 6030 */ 6031 if (item >= ss->n_items) { 6032 void **new_array; 6033 size_t new_n_items; 6034 struct i_ddi_soft_state *dirty; 6035 6036 /* 6037 * Allocate a new array of the right length, copy 6038 * all the old pointers to the new array, then 6039 * if it exists at all, put the old array on the 6040 * dirty list. 6041 * 6042 * Note that we can't kmem_free() the old array. 6043 * 6044 * Why -- well the 'get' operation is 'mutex-free', so we 6045 * can't easily catch a suspended thread that is just about 6046 * to dereference the array we just grew out of. So we 6047 * cons up a header and put it on a list of 'dirty' 6048 * pointer arrays. (Dirty in the sense that there may 6049 * be suspended threads somewhere that are in the middle 6050 * of referencing them). Fortunately, we -can- garbage 6051 * collect it all at ddi_soft_state_fini time. 6052 */ 6053 new_n_items = ss->n_items; 6054 while (new_n_items < (1 + item)) 6055 new_n_items <<= 1; /* double array size .. */ 6056 6057 ASSERT(new_n_items >= (1 + item)); /* sanity check! */ 6058 6059 new_array = kmem_zalloc(new_n_items * sizeof (void *), 6060 KM_SLEEP); 6061 /* 6062 * Copy the pointers into the new array 6063 */ 6064 bcopy(array, new_array, ss->n_items * sizeof (void *)); 6065 6066 /* 6067 * Save the old array on the dirty list 6068 */ 6069 dirty = kmem_zalloc(sizeof (*dirty), KM_SLEEP); 6070 dirty->array = ss->array; 6071 dirty->n_items = ss->n_items; 6072 dirty->next = ss->next; 6073 ss->next = dirty; 6074 6075 ss->array = (array = new_array); 6076 ss->n_items = new_n_items; 6077 } 6078 6079 ASSERT(array != NULL && item < ss->n_items && array[item] == NULL); 6080 6081 array[item] = new_element; 6082 6083 mutex_exit(&ss->lock); 6084 return (DDI_SUCCESS); 6085 } 6086 6087 /* 6088 * Fetch a pointer to the allocated soft state structure. 6089 * 6090 * This is designed to be cheap. 6091 * 6092 * There's an argument that there should be more checking for 6093 * nil pointers and out of bounds on the array.. but we do a lot 6094 * of that in the alloc/free routines. 6095 * 6096 * An array has the convenience that we don't need to lock read-access 6097 * to it c.f. a linked list. However our "expanding array" strategy 6098 * means that we should hold a readers lock on the i_ddi_soft_state 6099 * structure. 6100 * 6101 * However, from a performance viewpoint, we need to do it without 6102 * any locks at all -- this also makes it a leaf routine. The algorithm 6103 * is 'lock-free' because we only discard the pointer arrays at 6104 * ddi_soft_state_fini() time. 6105 */ 6106 void * 6107 ddi_get_soft_state(void *state, int item) 6108 { 6109 i_ddi_soft_state *ss = (i_ddi_soft_state *)state; 6110 6111 ASSERT((ss != NULL) && (item >= 0)); 6112 6113 if (item < ss->n_items && ss->array != NULL) 6114 return (ss->array[item]); 6115 return (NULL); 6116 } 6117 6118 /* 6119 * Free the state structure corresponding to 'item.' Freeing an 6120 * element that has either gone or was never allocated is not 6121 * considered an error. Note that we free the state structure, but 6122 * we don't shrink our pointer array, or discard 'dirty' arrays, 6123 * since even a few pointers don't really waste too much memory. 6124 * 6125 * Passing an item number that is out of bounds, or a null pointer will 6126 * provoke an error message. 6127 */ 6128 void 6129 ddi_soft_state_free(void *state, int item) 6130 { 6131 i_ddi_soft_state *ss = (i_ddi_soft_state *)state; 6132 void **array; 6133 void *element; 6134 static char msg[] = "ddi_soft_state_free:"; 6135 6136 if (ss == NULL) { 6137 cmn_err(CE_WARN, "%s null handle: %s", 6138 msg, mod_containing_pc(caller())); 6139 return; 6140 } 6141 6142 element = NULL; 6143 6144 mutex_enter(&ss->lock); 6145 6146 if ((array = ss->array) == NULL || ss->size == 0) { 6147 cmn_err(CE_WARN, "%s bad handle: %s", 6148 msg, mod_containing_pc(caller())); 6149 } else if (item < 0 || item >= ss->n_items) { 6150 cmn_err(CE_WARN, "%s item %d not in range [0..%lu]: %s", 6151 msg, item, ss->n_items - 1, mod_containing_pc(caller())); 6152 } else if (array[item] != NULL) { 6153 element = array[item]; 6154 array[item] = NULL; 6155 } 6156 6157 mutex_exit(&ss->lock); 6158 6159 if (element) 6160 kmem_free(element, ss->size); 6161 } 6162 6163 /* 6164 * Free the entire set of pointers, and any 6165 * soft state structures contained therein. 6166 * 6167 * Note that we don't grab the ss->lock mutex, even though 6168 * we're inspecting the various fields of the data structure. 6169 * 6170 * There is an implicit assumption that this routine will 6171 * never run concurrently with any of the above on this 6172 * particular state structure i.e. by the time the driver 6173 * calls this routine, there should be no other threads 6174 * running in the driver. 6175 */ 6176 void 6177 ddi_soft_state_fini(void **state_p) 6178 { 6179 i_ddi_soft_state *ss, *dirty; 6180 int item; 6181 static char msg[] = "ddi_soft_state_fini:"; 6182 6183 if (state_p == NULL || 6184 (ss = (i_ddi_soft_state *)(*state_p)) == NULL) { 6185 cmn_err(CE_WARN, "%s null handle: %s", 6186 msg, mod_containing_pc(caller())); 6187 return; 6188 } 6189 6190 if (ss->size == 0) { 6191 cmn_err(CE_WARN, "%s bad handle: %s", 6192 msg, mod_containing_pc(caller())); 6193 return; 6194 } 6195 6196 if (ss->n_items > 0) { 6197 for (item = 0; item < ss->n_items; item++) 6198 ddi_soft_state_free(ss, item); 6199 kmem_free(ss->array, ss->n_items * sizeof (void *)); 6200 } 6201 6202 /* 6203 * Now delete any dirty arrays from previous 'grow' operations 6204 */ 6205 for (dirty = ss->next; dirty; dirty = ss->next) { 6206 ss->next = dirty->next; 6207 kmem_free(dirty->array, dirty->n_items * sizeof (void *)); 6208 kmem_free(dirty, sizeof (*dirty)); 6209 } 6210 6211 mutex_destroy(&ss->lock); 6212 kmem_free(ss, sizeof (*ss)); 6213 6214 *state_p = NULL; 6215 } 6216 6217 #define SS_N_ITEMS_PER_HASH 16 6218 #define SS_MIN_HASH_SZ 16 6219 #define SS_MAX_HASH_SZ 4096 6220 6221 int 6222 ddi_soft_state_bystr_init(ddi_soft_state_bystr **state_p, size_t size, 6223 int n_items) 6224 { 6225 i_ddi_soft_state_bystr *sss; 6226 int hash_sz; 6227 6228 ASSERT(state_p && size && n_items); 6229 if ((state_p == NULL) || (size == 0) || (n_items == 0)) 6230 return (EINVAL); 6231 6232 /* current implementation is based on hash, convert n_items to hash */ 6233 hash_sz = n_items / SS_N_ITEMS_PER_HASH; 6234 if (hash_sz < SS_MIN_HASH_SZ) 6235 hash_sz = SS_MIN_HASH_SZ; 6236 else if (hash_sz > SS_MAX_HASH_SZ) 6237 hash_sz = SS_MAX_HASH_SZ; 6238 6239 /* allocate soft_state pool */ 6240 sss = kmem_zalloc(sizeof (*sss), KM_SLEEP); 6241 sss->ss_size = size; 6242 sss->ss_mod_hash = mod_hash_create_strhash("soft_state_bystr", 6243 hash_sz, mod_hash_null_valdtor); 6244 *state_p = (ddi_soft_state_bystr *)sss; 6245 return (0); 6246 } 6247 6248 int 6249 ddi_soft_state_bystr_zalloc(ddi_soft_state_bystr *state, const char *str) 6250 { 6251 i_ddi_soft_state_bystr *sss = (i_ddi_soft_state_bystr *)state; 6252 void *sso; 6253 char *dup_str; 6254 6255 ASSERT(sss && str && sss->ss_mod_hash); 6256 if ((sss == NULL) || (str == NULL) || (sss->ss_mod_hash == NULL)) 6257 return (DDI_FAILURE); 6258 sso = kmem_zalloc(sss->ss_size, KM_SLEEP); 6259 dup_str = i_ddi_strdup((char *)str, KM_SLEEP); 6260 if (mod_hash_insert(sss->ss_mod_hash, 6261 (mod_hash_key_t)dup_str, (mod_hash_val_t)sso) == 0) 6262 return (DDI_SUCCESS); 6263 6264 /* 6265 * The only error from an strhash insert is caused by a duplicate key. 6266 * We refuse to tread on an existing elements, so free and fail. 6267 */ 6268 kmem_free(dup_str, strlen(dup_str) + 1); 6269 kmem_free(sso, sss->ss_size); 6270 return (DDI_FAILURE); 6271 } 6272 6273 void * 6274 ddi_soft_state_bystr_get(ddi_soft_state_bystr *state, const char *str) 6275 { 6276 i_ddi_soft_state_bystr *sss = (i_ddi_soft_state_bystr *)state; 6277 void *sso; 6278 6279 ASSERT(sss && str && sss->ss_mod_hash); 6280 if ((sss == NULL) || (str == NULL) || (sss->ss_mod_hash == NULL)) 6281 return (NULL); 6282 6283 if (mod_hash_find(sss->ss_mod_hash, 6284 (mod_hash_key_t)str, (mod_hash_val_t *)&sso) == 0) 6285 return (sso); 6286 return (NULL); 6287 } 6288 6289 void 6290 ddi_soft_state_bystr_free(ddi_soft_state_bystr *state, const char *str) 6291 { 6292 i_ddi_soft_state_bystr *sss = (i_ddi_soft_state_bystr *)state; 6293 void *sso; 6294 6295 ASSERT(sss && str && sss->ss_mod_hash); 6296 if ((sss == NULL) || (str == NULL) || (sss->ss_mod_hash == NULL)) 6297 return; 6298 6299 (void) mod_hash_remove(sss->ss_mod_hash, 6300 (mod_hash_key_t)str, (mod_hash_val_t *)&sso); 6301 kmem_free(sso, sss->ss_size); 6302 } 6303 6304 void 6305 ddi_soft_state_bystr_fini(ddi_soft_state_bystr **state_p) 6306 { 6307 i_ddi_soft_state_bystr *sss; 6308 6309 ASSERT(state_p); 6310 if (state_p == NULL) 6311 return; 6312 6313 sss = (i_ddi_soft_state_bystr *)(*state_p); 6314 if (sss == NULL) 6315 return; 6316 6317 ASSERT(sss->ss_mod_hash); 6318 if (sss->ss_mod_hash) { 6319 mod_hash_destroy_strhash(sss->ss_mod_hash); 6320 sss->ss_mod_hash = NULL; 6321 } 6322 6323 kmem_free(sss, sizeof (*sss)); 6324 *state_p = NULL; 6325 } 6326 6327 /* 6328 * The ddi_strid_* routines provide string-to-index management utilities. 6329 */ 6330 /* allocate and initialize an strid set */ 6331 int 6332 ddi_strid_init(ddi_strid **strid_p, int n_items) 6333 { 6334 i_ddi_strid *ss; 6335 int hash_sz; 6336 6337 if (strid_p == NULL) 6338 return (DDI_FAILURE); 6339 6340 /* current implementation is based on hash, convert n_items to hash */ 6341 hash_sz = n_items / SS_N_ITEMS_PER_HASH; 6342 if (hash_sz < SS_MIN_HASH_SZ) 6343 hash_sz = SS_MIN_HASH_SZ; 6344 else if (hash_sz > SS_MAX_HASH_SZ) 6345 hash_sz = SS_MAX_HASH_SZ; 6346 6347 ss = kmem_alloc(sizeof (*ss), KM_SLEEP); 6348 ss->strid_chunksz = n_items; 6349 ss->strid_spacesz = n_items; 6350 ss->strid_space = id_space_create("strid", 1, n_items); 6351 ss->strid_bystr = mod_hash_create_strhash("strid_bystr", hash_sz, 6352 mod_hash_null_valdtor); 6353 ss->strid_byid = mod_hash_create_idhash("strid_byid", hash_sz, 6354 mod_hash_null_valdtor); 6355 *strid_p = (ddi_strid *)ss; 6356 return (DDI_SUCCESS); 6357 } 6358 6359 /* allocate an id mapping within the specified set for str, return id */ 6360 static id_t 6361 i_ddi_strid_alloc(ddi_strid *strid, char *str) 6362 { 6363 i_ddi_strid *ss = (i_ddi_strid *)strid; 6364 id_t id; 6365 char *s; 6366 6367 ASSERT(ss && str); 6368 if ((ss == NULL) || (str == NULL)) 6369 return (0); 6370 6371 /* 6372 * Allocate an id using VM_FIRSTFIT in order to keep allocated id 6373 * range as compressed as possible. This is important to minimize 6374 * the amount of space used when the id is used as a ddi_soft_state 6375 * index by the caller. 6376 * 6377 * If the id list is exhausted, increase the size of the list 6378 * by the chuck size specified in ddi_strid_init and reattempt 6379 * the allocation 6380 */ 6381 if ((id = id_allocff_nosleep(ss->strid_space)) == (id_t)-1) { 6382 id_space_extend(ss->strid_space, ss->strid_spacesz, 6383 ss->strid_spacesz + ss->strid_chunksz); 6384 ss->strid_spacesz += ss->strid_chunksz; 6385 if ((id = id_allocff_nosleep(ss->strid_space)) == (id_t)-1) 6386 return (0); 6387 } 6388 6389 /* 6390 * NOTE: since we create and destroy in unison we can save space by 6391 * using bystr key as the byid value. This means destroy must occur 6392 * in (byid, bystr) order. 6393 */ 6394 s = i_ddi_strdup(str, KM_SLEEP); 6395 if (mod_hash_insert(ss->strid_bystr, (mod_hash_key_t)s, 6396 (mod_hash_val_t)(intptr_t)id) != 0) { 6397 ddi_strid_free(strid, id); 6398 return (0); 6399 } 6400 if (mod_hash_insert(ss->strid_byid, (mod_hash_key_t)(intptr_t)id, 6401 (mod_hash_val_t)s) != 0) { 6402 ddi_strid_free(strid, id); 6403 return (0); 6404 } 6405 6406 /* NOTE: s if freed on mod_hash_destroy by mod_hash_strval_dtor */ 6407 return (id); 6408 } 6409 6410 /* allocate an id mapping within the specified set for str, return id */ 6411 id_t 6412 ddi_strid_alloc(ddi_strid *strid, char *str) 6413 { 6414 return (i_ddi_strid_alloc(strid, str)); 6415 } 6416 6417 /* return the id within the specified strid given the str */ 6418 id_t 6419 ddi_strid_str2id(ddi_strid *strid, char *str) 6420 { 6421 i_ddi_strid *ss = (i_ddi_strid *)strid; 6422 id_t id = 0; 6423 mod_hash_val_t hv; 6424 6425 ASSERT(ss && str); 6426 if (ss && str && (mod_hash_find(ss->strid_bystr, 6427 (mod_hash_key_t)str, &hv) == 0)) 6428 id = (int)(intptr_t)hv; 6429 return (id); 6430 } 6431 6432 /* return str within the specified strid given the id */ 6433 char * 6434 ddi_strid_id2str(ddi_strid *strid, id_t id) 6435 { 6436 i_ddi_strid *ss = (i_ddi_strid *)strid; 6437 char *str = NULL; 6438 mod_hash_val_t hv; 6439 6440 ASSERT(ss && id > 0); 6441 if (ss && (id > 0) && (mod_hash_find(ss->strid_byid, 6442 (mod_hash_key_t)(uintptr_t)id, &hv) == 0)) 6443 str = (char *)hv; 6444 return (str); 6445 } 6446 6447 /* free the id mapping within the specified strid */ 6448 void 6449 ddi_strid_free(ddi_strid *strid, id_t id) 6450 { 6451 i_ddi_strid *ss = (i_ddi_strid *)strid; 6452 char *str; 6453 6454 ASSERT(ss && id > 0); 6455 if ((ss == NULL) || (id <= 0)) 6456 return; 6457 6458 /* bystr key is byid value: destroy order must be (byid, bystr) */ 6459 str = ddi_strid_id2str(strid, id); 6460 (void) mod_hash_destroy(ss->strid_byid, (mod_hash_key_t)(uintptr_t)id); 6461 id_free(ss->strid_space, id); 6462 6463 if (str) 6464 (void) mod_hash_destroy(ss->strid_bystr, (mod_hash_key_t)str); 6465 } 6466 6467 /* destroy the strid set */ 6468 void 6469 ddi_strid_fini(ddi_strid **strid_p) 6470 { 6471 i_ddi_strid *ss; 6472 6473 ASSERT(strid_p); 6474 if (strid_p == NULL) 6475 return; 6476 6477 ss = (i_ddi_strid *)(*strid_p); 6478 if (ss == NULL) 6479 return; 6480 6481 /* bystr key is byid value: destroy order must be (byid, bystr) */ 6482 if (ss->strid_byid) 6483 mod_hash_destroy_hash(ss->strid_byid); 6484 if (ss->strid_byid) 6485 mod_hash_destroy_hash(ss->strid_bystr); 6486 if (ss->strid_space) 6487 id_space_destroy(ss->strid_space); 6488 kmem_free(ss, sizeof (*ss)); 6489 *strid_p = NULL; 6490 } 6491 6492 /* 6493 * This sets the devi_addr entry in the dev_info structure 'dip' to 'name'. 6494 * Storage is double buffered to prevent updates during devi_addr use - 6495 * double buffering is adaquate for reliable ddi_deviname() consumption. 6496 * The double buffer is not freed until dev_info structure destruction 6497 * (by i_ddi_free_node). 6498 */ 6499 void 6500 ddi_set_name_addr(dev_info_t *dip, char *name) 6501 { 6502 char *buf = DEVI(dip)->devi_addr_buf; 6503 char *newaddr; 6504 6505 if (buf == NULL) { 6506 buf = kmem_zalloc(2 * MAXNAMELEN, KM_SLEEP); 6507 DEVI(dip)->devi_addr_buf = buf; 6508 } 6509 6510 if (name) { 6511 ASSERT(strlen(name) < MAXNAMELEN); 6512 newaddr = (DEVI(dip)->devi_addr == buf) ? 6513 (buf + MAXNAMELEN) : buf; 6514 (void) strlcpy(newaddr, name, MAXNAMELEN); 6515 } else 6516 newaddr = NULL; 6517 6518 DEVI(dip)->devi_addr = newaddr; 6519 } 6520 6521 char * 6522 ddi_get_name_addr(dev_info_t *dip) 6523 { 6524 return (DEVI(dip)->devi_addr); 6525 } 6526 6527 void 6528 ddi_set_parent_data(dev_info_t *dip, void *pd) 6529 { 6530 DEVI(dip)->devi_parent_data = pd; 6531 } 6532 6533 void * 6534 ddi_get_parent_data(dev_info_t *dip) 6535 { 6536 return (DEVI(dip)->devi_parent_data); 6537 } 6538 6539 /* 6540 * ddi_name_to_major: returns the major number of a named module, 6541 * derived from the current driver alias binding. 6542 * 6543 * Caveat: drivers should avoid the use of this function, in particular 6544 * together with ddi_get_name/ddi_binding name, as per 6545 * major = ddi_name_to_major(ddi_get_name(devi)); 6546 * ddi_name_to_major() relies on the state of the device/alias binding, 6547 * which can and does change dynamically as aliases are administered 6548 * over time. An attached device instance cannot rely on the major 6549 * number returned by ddi_name_to_major() to match its own major number. 6550 * 6551 * For driver use, ddi_driver_major() reliably returns the major number 6552 * for the module to which the device was bound at attach time over 6553 * the life of the instance. 6554 * major = ddi_driver_major(dev_info_t *) 6555 */ 6556 major_t 6557 ddi_name_to_major(char *name) 6558 { 6559 return (mod_name_to_major(name)); 6560 } 6561 6562 /* 6563 * ddi_major_to_name: Returns the module name bound to a major number. 6564 */ 6565 char * 6566 ddi_major_to_name(major_t major) 6567 { 6568 return (mod_major_to_name(major)); 6569 } 6570 6571 /* 6572 * Return the name of the devinfo node pointed at by 'dip' in the buffer 6573 * pointed at by 'name.' A devinfo node is named as a result of calling 6574 * ddi_initchild(). 6575 * 6576 * Note: the driver must be held before calling this function! 6577 */ 6578 char * 6579 ddi_deviname(dev_info_t *dip, char *name) 6580 { 6581 char *addrname; 6582 char none = '\0'; 6583 6584 if (dip == ddi_root_node()) { 6585 *name = '\0'; 6586 return (name); 6587 } 6588 6589 if (i_ddi_node_state(dip) < DS_BOUND) { 6590 addrname = &none; 6591 } else { 6592 /* 6593 * Use ddi_get_name_addr() without checking state so we get 6594 * a unit-address if we are called after ddi_set_name_addr() 6595 * by nexus DDI_CTL_INITCHILD code, but before completing 6596 * node promotion to DS_INITIALIZED. We currently have 6597 * two situations where we are called in this state: 6598 * o For framework processing of a path-oriented alias. 6599 * o If a SCSA nexus driver calls ddi_devid_register() 6600 * from it's tran_tgt_init(9E) implementation. 6601 */ 6602 addrname = ddi_get_name_addr(dip); 6603 if (addrname == NULL) 6604 addrname = &none; 6605 } 6606 6607 if (*addrname == '\0') { 6608 (void) sprintf(name, "/%s", ddi_node_name(dip)); 6609 } else { 6610 (void) sprintf(name, "/%s@%s", ddi_node_name(dip), addrname); 6611 } 6612 6613 return (name); 6614 } 6615 6616 /* 6617 * Spits out the name of device node, typically name@addr, for a given node, 6618 * using the driver name, not the nodename. 6619 * 6620 * Used by match_parent. Not to be used elsewhere. 6621 */ 6622 char * 6623 i_ddi_parname(dev_info_t *dip, char *name) 6624 { 6625 char *addrname; 6626 6627 if (dip == ddi_root_node()) { 6628 *name = '\0'; 6629 return (name); 6630 } 6631 6632 ASSERT(i_ddi_node_state(dip) >= DS_INITIALIZED); 6633 6634 if (*(addrname = ddi_get_name_addr(dip)) == '\0') 6635 (void) sprintf(name, "%s", ddi_binding_name(dip)); 6636 else 6637 (void) sprintf(name, "%s@%s", ddi_binding_name(dip), addrname); 6638 return (name); 6639 } 6640 6641 static char * 6642 pathname_work(dev_info_t *dip, char *path) 6643 { 6644 char *bp; 6645 6646 if (dip == ddi_root_node()) { 6647 *path = '\0'; 6648 return (path); 6649 } 6650 (void) pathname_work(ddi_get_parent(dip), path); 6651 bp = path + strlen(path); 6652 (void) ddi_deviname(dip, bp); 6653 return (path); 6654 } 6655 6656 char * 6657 ddi_pathname(dev_info_t *dip, char *path) 6658 { 6659 return (pathname_work(dip, path)); 6660 } 6661 6662 char * 6663 ddi_pathname_minor(struct ddi_minor_data *dmdp, char *path) 6664 { 6665 if (dmdp->dip == NULL) 6666 *path = '\0'; 6667 else { 6668 (void) ddi_pathname(dmdp->dip, path); 6669 if (dmdp->ddm_name) { 6670 (void) strcat(path, ":"); 6671 (void) strcat(path, dmdp->ddm_name); 6672 } 6673 } 6674 return (path); 6675 } 6676 6677 static char * 6678 pathname_work_obp(dev_info_t *dip, char *path) 6679 { 6680 char *bp; 6681 char *obp_path; 6682 6683 /* 6684 * look up the "obp-path" property, return the path if it exists 6685 */ 6686 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 6687 "obp-path", &obp_path) == DDI_PROP_SUCCESS) { 6688 (void) strcpy(path, obp_path); 6689 ddi_prop_free(obp_path); 6690 return (path); 6691 } 6692 6693 /* 6694 * stop at root, no obp path 6695 */ 6696 if (dip == ddi_root_node()) { 6697 return (NULL); 6698 } 6699 6700 obp_path = pathname_work_obp(ddi_get_parent(dip), path); 6701 if (obp_path == NULL) 6702 return (NULL); 6703 6704 /* 6705 * append our component to parent's obp path 6706 */ 6707 bp = path + strlen(path); 6708 if (*(bp - 1) != '/') 6709 (void) strcat(bp++, "/"); 6710 (void) ddi_deviname(dip, bp); 6711 return (path); 6712 } 6713 6714 /* 6715 * return the 'obp-path' based path for the given node, or NULL if the node 6716 * does not have a different obp path. NOTE: Unlike ddi_pathname, this 6717 * function can't be called from interrupt context (since we need to 6718 * lookup a string property). 6719 */ 6720 char * 6721 ddi_pathname_obp(dev_info_t *dip, char *path) 6722 { 6723 ASSERT(!servicing_interrupt()); 6724 if (dip == NULL || path == NULL) 6725 return (NULL); 6726 6727 /* split work into a separate function to aid debugging */ 6728 return (pathname_work_obp(dip, path)); 6729 } 6730 6731 int 6732 ddi_pathname_obp_set(dev_info_t *dip, char *component) 6733 { 6734 dev_info_t *pdip; 6735 char *obp_path = NULL; 6736 int rc = DDI_FAILURE; 6737 6738 if (dip == NULL) 6739 return (DDI_FAILURE); 6740 6741 obp_path = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 6742 6743 pdip = ddi_get_parent(dip); 6744 6745 if (ddi_pathname_obp(pdip, obp_path) == NULL) { 6746 (void) ddi_pathname(pdip, obp_path); 6747 } 6748 6749 if (component) { 6750 (void) strncat(obp_path, "/", MAXPATHLEN); 6751 (void) strncat(obp_path, component, MAXPATHLEN); 6752 } 6753 rc = ndi_prop_update_string(DDI_DEV_T_NONE, dip, "obp-path", 6754 obp_path); 6755 6756 if (obp_path) 6757 kmem_free(obp_path, MAXPATHLEN); 6758 6759 return (rc); 6760 } 6761 6762 /* 6763 * Given a dev_t, return the pathname of the corresponding device in the 6764 * buffer pointed at by "path." The buffer is assumed to be large enough 6765 * to hold the pathname of the device (MAXPATHLEN). 6766 * 6767 * The pathname of a device is the pathname of the devinfo node to which 6768 * the device "belongs," concatenated with the character ':' and the name 6769 * of the minor node corresponding to the dev_t. If spec_type is 0 then 6770 * just the pathname of the devinfo node is returned without driving attach 6771 * of that node. For a non-zero spec_type, an attach is performed and a 6772 * search of the minor list occurs. 6773 * 6774 * It is possible that the path associated with the dev_t is not 6775 * currently available in the devinfo tree. In order to have a 6776 * dev_t, a device must have been discovered before, which means 6777 * that the path is always in the instance tree. The one exception 6778 * to this is if the dev_t is associated with a pseudo driver, in 6779 * which case the device must exist on the pseudo branch of the 6780 * devinfo tree as a result of parsing .conf files. 6781 */ 6782 int 6783 ddi_dev_pathname(dev_t devt, int spec_type, char *path) 6784 { 6785 int circ; 6786 major_t major = getmajor(devt); 6787 int instance; 6788 dev_info_t *dip; 6789 char *minorname; 6790 char *drvname; 6791 6792 if (major >= devcnt) 6793 goto fail; 6794 if (major == clone_major) { 6795 /* clone has no minor nodes, manufacture the path here */ 6796 if ((drvname = ddi_major_to_name(getminor(devt))) == NULL) 6797 goto fail; 6798 6799 (void) snprintf(path, MAXPATHLEN, "%s:%s", CLONE_PATH, drvname); 6800 return (DDI_SUCCESS); 6801 } 6802 6803 /* extract instance from devt (getinfo(9E) DDI_INFO_DEVT2INSTANCE). */ 6804 if ((instance = dev_to_instance(devt)) == -1) 6805 goto fail; 6806 6807 /* reconstruct the path given the major/instance */ 6808 if (e_ddi_majorinstance_to_path(major, instance, path) != DDI_SUCCESS) 6809 goto fail; 6810 6811 /* if spec_type given we must drive attach and search minor nodes */ 6812 if ((spec_type == S_IFCHR) || (spec_type == S_IFBLK)) { 6813 /* attach the path so we can search minors */ 6814 if ((dip = e_ddi_hold_devi_by_path(path, 0)) == NULL) 6815 goto fail; 6816 6817 /* Add minorname to path. */ 6818 ndi_devi_enter(dip, &circ); 6819 minorname = i_ddi_devtspectype_to_minorname(dip, 6820 devt, spec_type); 6821 if (minorname) { 6822 (void) strcat(path, ":"); 6823 (void) strcat(path, minorname); 6824 } 6825 ndi_devi_exit(dip, circ); 6826 ddi_release_devi(dip); 6827 if (minorname == NULL) 6828 goto fail; 6829 } 6830 ASSERT(strlen(path) < MAXPATHLEN); 6831 return (DDI_SUCCESS); 6832 6833 fail: *path = 0; 6834 return (DDI_FAILURE); 6835 } 6836 6837 /* 6838 * Given a major number and an instance, return the path. 6839 * This interface does NOT drive attach. 6840 */ 6841 int 6842 e_ddi_majorinstance_to_path(major_t major, int instance, char *path) 6843 { 6844 struct devnames *dnp; 6845 dev_info_t *dip; 6846 6847 if ((major >= devcnt) || (instance == -1)) { 6848 *path = 0; 6849 return (DDI_FAILURE); 6850 } 6851 6852 /* look for the major/instance in the instance tree */ 6853 if (e_ddi_instance_majorinstance_to_path(major, instance, 6854 path) == DDI_SUCCESS) { 6855 ASSERT(strlen(path) < MAXPATHLEN); 6856 return (DDI_SUCCESS); 6857 } 6858 6859 /* 6860 * Not in instance tree, find the instance on the per driver list and 6861 * construct path to instance via ddi_pathname(). This is how paths 6862 * down the 'pseudo' branch are constructed. 6863 */ 6864 dnp = &(devnamesp[major]); 6865 LOCK_DEV_OPS(&(dnp->dn_lock)); 6866 for (dip = dnp->dn_head; dip; 6867 dip = (dev_info_t *)DEVI(dip)->devi_next) { 6868 /* Skip if instance does not match. */ 6869 if (DEVI(dip)->devi_instance != instance) 6870 continue; 6871 6872 /* 6873 * An ndi_hold_devi() does not prevent DS_INITIALIZED->DS_BOUND 6874 * node demotion, so it is not an effective way of ensuring 6875 * that the ddi_pathname result has a unit-address. Instead, 6876 * we reverify the node state after calling ddi_pathname(). 6877 */ 6878 if (i_ddi_node_state(dip) >= DS_INITIALIZED) { 6879 (void) ddi_pathname(dip, path); 6880 if (i_ddi_node_state(dip) < DS_INITIALIZED) 6881 continue; 6882 UNLOCK_DEV_OPS(&(dnp->dn_lock)); 6883 ASSERT(strlen(path) < MAXPATHLEN); 6884 return (DDI_SUCCESS); 6885 } 6886 } 6887 UNLOCK_DEV_OPS(&(dnp->dn_lock)); 6888 6889 /* can't reconstruct the path */ 6890 *path = 0; 6891 return (DDI_FAILURE); 6892 } 6893 6894 #define GLD_DRIVER_PPA "SUNW,gld_v0_ppa" 6895 6896 /* 6897 * Given the dip for a network interface return the ppa for that interface. 6898 * 6899 * In all cases except GLD v0 drivers, the ppa == instance. 6900 * In the case of GLD v0 drivers, the ppa is equal to the attach order. 6901 * So for these drivers when the attach routine calls gld_register(), 6902 * the GLD framework creates an integer property called "gld_driver_ppa" 6903 * that can be queried here. 6904 * 6905 * The only time this function is used is when a system is booting over nfs. 6906 * In this case the system has to resolve the pathname of the boot device 6907 * to it's ppa. 6908 */ 6909 int 6910 i_ddi_devi_get_ppa(dev_info_t *dip) 6911 { 6912 return (ddi_prop_get_int(DDI_DEV_T_ANY, dip, 6913 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 6914 GLD_DRIVER_PPA, ddi_get_instance(dip))); 6915 } 6916 6917 /* 6918 * i_ddi_devi_set_ppa() should only be called from gld_register() 6919 * and only for GLD v0 drivers 6920 */ 6921 void 6922 i_ddi_devi_set_ppa(dev_info_t *dip, int ppa) 6923 { 6924 (void) e_ddi_prop_update_int(DDI_DEV_T_NONE, dip, GLD_DRIVER_PPA, ppa); 6925 } 6926 6927 6928 /* 6929 * Private DDI Console bell functions. 6930 */ 6931 void 6932 ddi_ring_console_bell(clock_t duration) 6933 { 6934 if (ddi_console_bell_func != NULL) 6935 (*ddi_console_bell_func)(duration); 6936 } 6937 6938 void 6939 ddi_set_console_bell(void (*bellfunc)(clock_t duration)) 6940 { 6941 ddi_console_bell_func = bellfunc; 6942 } 6943 6944 int 6945 ddi_dma_alloc_handle(dev_info_t *dip, ddi_dma_attr_t *attr, 6946 int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep) 6947 { 6948 int (*funcp)() = ddi_dma_allochdl; 6949 ddi_dma_attr_t dma_attr; 6950 struct bus_ops *bop; 6951 6952 if (attr == (ddi_dma_attr_t *)0) 6953 return (DDI_DMA_BADATTR); 6954 6955 dma_attr = *attr; 6956 6957 bop = DEVI(dip)->devi_ops->devo_bus_ops; 6958 if (bop && bop->bus_dma_allochdl) 6959 funcp = bop->bus_dma_allochdl; 6960 6961 return ((*funcp)(dip, dip, &dma_attr, waitfp, arg, handlep)); 6962 } 6963 6964 void 6965 ddi_dma_free_handle(ddi_dma_handle_t *handlep) 6966 { 6967 ddi_dma_handle_t h = *handlep; 6968 (void) ddi_dma_freehdl(HD, HD, h); 6969 } 6970 6971 static uintptr_t dma_mem_list_id = 0; 6972 6973 6974 int 6975 ddi_dma_mem_alloc(ddi_dma_handle_t handle, size_t length, 6976 ddi_device_acc_attr_t *accattrp, uint_t flags, 6977 int (*waitfp)(caddr_t), caddr_t arg, caddr_t *kaddrp, 6978 size_t *real_length, ddi_acc_handle_t *handlep) 6979 { 6980 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 6981 dev_info_t *dip = hp->dmai_rdip; 6982 ddi_acc_hdl_t *ap; 6983 ddi_dma_attr_t *attrp = &hp->dmai_attr; 6984 uint_t sleepflag, xfermodes; 6985 int (*fp)(caddr_t); 6986 int rval; 6987 6988 if (waitfp == DDI_DMA_SLEEP) 6989 fp = (int (*)())KM_SLEEP; 6990 else if (waitfp == DDI_DMA_DONTWAIT) 6991 fp = (int (*)())KM_NOSLEEP; 6992 else 6993 fp = waitfp; 6994 *handlep = impl_acc_hdl_alloc(fp, arg); 6995 if (*handlep == NULL) 6996 return (DDI_FAILURE); 6997 6998 /* check if the cache attributes are supported */ 6999 if (i_ddi_check_cache_attr(flags) == B_FALSE) 7000 return (DDI_FAILURE); 7001 7002 /* 7003 * Transfer the meaningful bits to xfermodes. 7004 * Double-check if the 3rd party driver correctly sets the bits. 7005 * If not, set DDI_DMA_STREAMING to keep compatibility. 7006 */ 7007 xfermodes = flags & (DDI_DMA_CONSISTENT | DDI_DMA_STREAMING); 7008 if (xfermodes == 0) { 7009 xfermodes = DDI_DMA_STREAMING; 7010 } 7011 7012 /* 7013 * initialize the common elements of data access handle 7014 */ 7015 ap = impl_acc_hdl_get(*handlep); 7016 ap->ah_vers = VERS_ACCHDL; 7017 ap->ah_dip = dip; 7018 ap->ah_offset = 0; 7019 ap->ah_len = 0; 7020 ap->ah_xfermodes = flags; 7021 ap->ah_acc = *accattrp; 7022 7023 sleepflag = ((waitfp == DDI_DMA_SLEEP) ? 1 : 0); 7024 if (xfermodes == DDI_DMA_CONSISTENT) { 7025 rval = i_ddi_mem_alloc(dip, attrp, length, sleepflag, 7026 flags, accattrp, kaddrp, NULL, ap); 7027 *real_length = length; 7028 } else { 7029 rval = i_ddi_mem_alloc(dip, attrp, length, sleepflag, 7030 flags, accattrp, kaddrp, real_length, ap); 7031 } 7032 if (rval == DDI_SUCCESS) { 7033 ap->ah_len = (off_t)(*real_length); 7034 ap->ah_addr = *kaddrp; 7035 } else { 7036 impl_acc_hdl_free(*handlep); 7037 *handlep = (ddi_acc_handle_t)NULL; 7038 if (waitfp != DDI_DMA_SLEEP && waitfp != DDI_DMA_DONTWAIT) { 7039 ddi_set_callback(waitfp, arg, &dma_mem_list_id); 7040 } 7041 rval = DDI_FAILURE; 7042 } 7043 return (rval); 7044 } 7045 7046 void 7047 ddi_dma_mem_free(ddi_acc_handle_t *handlep) 7048 { 7049 ddi_acc_hdl_t *ap; 7050 7051 ap = impl_acc_hdl_get(*handlep); 7052 ASSERT(ap); 7053 7054 i_ddi_mem_free((caddr_t)ap->ah_addr, ap); 7055 7056 /* 7057 * free the handle 7058 */ 7059 impl_acc_hdl_free(*handlep); 7060 *handlep = (ddi_acc_handle_t)NULL; 7061 7062 if (dma_mem_list_id != 0) { 7063 ddi_run_callback(&dma_mem_list_id); 7064 } 7065 } 7066 7067 int 7068 ddi_dma_buf_bind_handle(ddi_dma_handle_t handle, struct buf *bp, 7069 uint_t flags, int (*waitfp)(caddr_t), caddr_t arg, 7070 ddi_dma_cookie_t *cookiep, uint_t *ccountp) 7071 { 7072 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7073 dev_info_t *dip, *rdip; 7074 struct ddi_dma_req dmareq; 7075 int (*funcp)(); 7076 7077 dmareq.dmar_flags = flags; 7078 dmareq.dmar_fp = waitfp; 7079 dmareq.dmar_arg = arg; 7080 dmareq.dmar_object.dmao_size = (uint_t)bp->b_bcount; 7081 7082 if (bp->b_flags & B_PAGEIO) { 7083 dmareq.dmar_object.dmao_type = DMA_OTYP_PAGES; 7084 dmareq.dmar_object.dmao_obj.pp_obj.pp_pp = bp->b_pages; 7085 dmareq.dmar_object.dmao_obj.pp_obj.pp_offset = 7086 (uint_t)(((uintptr_t)bp->b_un.b_addr) & MMU_PAGEOFFSET); 7087 } else { 7088 dmareq.dmar_object.dmao_obj.virt_obj.v_addr = bp->b_un.b_addr; 7089 if (bp->b_flags & B_SHADOW) { 7090 dmareq.dmar_object.dmao_obj.virt_obj.v_priv = 7091 bp->b_shadow; 7092 dmareq.dmar_object.dmao_type = DMA_OTYP_BUFVADDR; 7093 } else { 7094 dmareq.dmar_object.dmao_type = 7095 (bp->b_flags & (B_PHYS | B_REMAPPED)) ? 7096 DMA_OTYP_BUFVADDR : DMA_OTYP_VADDR; 7097 dmareq.dmar_object.dmao_obj.virt_obj.v_priv = NULL; 7098 } 7099 7100 /* 7101 * If the buffer has no proc pointer, or the proc 7102 * struct has the kernel address space, or the buffer has 7103 * been marked B_REMAPPED (meaning that it is now 7104 * mapped into the kernel's address space), then 7105 * the address space is kas (kernel address space). 7106 */ 7107 if ((bp->b_proc == NULL) || (bp->b_proc->p_as == &kas) || 7108 (bp->b_flags & B_REMAPPED)) { 7109 dmareq.dmar_object.dmao_obj.virt_obj.v_as = 0; 7110 } else { 7111 dmareq.dmar_object.dmao_obj.virt_obj.v_as = 7112 bp->b_proc->p_as; 7113 } 7114 } 7115 7116 dip = rdip = hp->dmai_rdip; 7117 if (dip != ddi_root_node()) 7118 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_bindhdl; 7119 funcp = DEVI(rdip)->devi_bus_dma_bindfunc; 7120 return ((*funcp)(dip, rdip, handle, &dmareq, cookiep, ccountp)); 7121 } 7122 7123 int 7124 ddi_dma_addr_bind_handle(ddi_dma_handle_t handle, struct as *as, 7125 caddr_t addr, size_t len, uint_t flags, int (*waitfp)(caddr_t), 7126 caddr_t arg, ddi_dma_cookie_t *cookiep, uint_t *ccountp) 7127 { 7128 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7129 dev_info_t *dip, *rdip; 7130 struct ddi_dma_req dmareq; 7131 int (*funcp)(); 7132 7133 if (len == (uint_t)0) { 7134 return (DDI_DMA_NOMAPPING); 7135 } 7136 dmareq.dmar_flags = flags; 7137 dmareq.dmar_fp = waitfp; 7138 dmareq.dmar_arg = arg; 7139 dmareq.dmar_object.dmao_size = len; 7140 dmareq.dmar_object.dmao_type = DMA_OTYP_VADDR; 7141 dmareq.dmar_object.dmao_obj.virt_obj.v_as = as; 7142 dmareq.dmar_object.dmao_obj.virt_obj.v_addr = addr; 7143 dmareq.dmar_object.dmao_obj.virt_obj.v_priv = NULL; 7144 7145 dip = rdip = hp->dmai_rdip; 7146 if (dip != ddi_root_node()) 7147 dip = (dev_info_t *)DEVI(dip)->devi_bus_dma_bindhdl; 7148 funcp = DEVI(rdip)->devi_bus_dma_bindfunc; 7149 return ((*funcp)(dip, rdip, handle, &dmareq, cookiep, ccountp)); 7150 } 7151 7152 void 7153 ddi_dma_nextcookie(ddi_dma_handle_t handle, ddi_dma_cookie_t *cookiep) 7154 { 7155 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7156 ddi_dma_cookie_t *cp; 7157 7158 cp = hp->dmai_cookie; 7159 ASSERT(cp); 7160 7161 cookiep->dmac_notused = cp->dmac_notused; 7162 cookiep->dmac_type = cp->dmac_type; 7163 cookiep->dmac_address = cp->dmac_address; 7164 cookiep->dmac_size = cp->dmac_size; 7165 hp->dmai_cookie++; 7166 } 7167 7168 int 7169 ddi_dma_numwin(ddi_dma_handle_t handle, uint_t *nwinp) 7170 { 7171 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7172 if ((hp->dmai_rflags & DDI_DMA_PARTIAL) == 0) { 7173 return (DDI_FAILURE); 7174 } else { 7175 *nwinp = hp->dmai_nwin; 7176 return (DDI_SUCCESS); 7177 } 7178 } 7179 7180 int 7181 ddi_dma_getwin(ddi_dma_handle_t h, uint_t win, off_t *offp, 7182 size_t *lenp, ddi_dma_cookie_t *cookiep, uint_t *ccountp) 7183 { 7184 int (*funcp)() = ddi_dma_win; 7185 struct bus_ops *bop; 7186 7187 bop = DEVI(HD)->devi_ops->devo_bus_ops; 7188 if (bop && bop->bus_dma_win) 7189 funcp = bop->bus_dma_win; 7190 7191 return ((*funcp)(HD, HD, h, win, offp, lenp, cookiep, ccountp)); 7192 } 7193 7194 int 7195 ddi_dma_set_sbus64(ddi_dma_handle_t h, ulong_t burstsizes) 7196 { 7197 return (ddi_dma_mctl(HD, HD, h, DDI_DMA_SET_SBUS64, 0, 7198 &burstsizes, 0, 0)); 7199 } 7200 7201 int 7202 i_ddi_dma_fault_check(ddi_dma_impl_t *hp) 7203 { 7204 return (hp->dmai_fault); 7205 } 7206 7207 int 7208 ddi_check_dma_handle(ddi_dma_handle_t handle) 7209 { 7210 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7211 int (*check)(ddi_dma_impl_t *); 7212 7213 if ((check = hp->dmai_fault_check) == NULL) 7214 check = i_ddi_dma_fault_check; 7215 7216 return (((*check)(hp) == DDI_SUCCESS) ? DDI_SUCCESS : DDI_FAILURE); 7217 } 7218 7219 void 7220 i_ddi_dma_set_fault(ddi_dma_handle_t handle) 7221 { 7222 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7223 void (*notify)(ddi_dma_impl_t *); 7224 7225 if (!hp->dmai_fault) { 7226 hp->dmai_fault = 1; 7227 if ((notify = hp->dmai_fault_notify) != NULL) 7228 (*notify)(hp); 7229 } 7230 } 7231 7232 void 7233 i_ddi_dma_clr_fault(ddi_dma_handle_t handle) 7234 { 7235 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 7236 void (*notify)(ddi_dma_impl_t *); 7237 7238 if (hp->dmai_fault) { 7239 hp->dmai_fault = 0; 7240 if ((notify = hp->dmai_fault_notify) != NULL) 7241 (*notify)(hp); 7242 } 7243 } 7244 7245 /* 7246 * register mapping routines. 7247 */ 7248 int 7249 ddi_regs_map_setup(dev_info_t *dip, uint_t rnumber, caddr_t *addrp, 7250 offset_t offset, offset_t len, ddi_device_acc_attr_t *accattrp, 7251 ddi_acc_handle_t *handle) 7252 { 7253 ddi_map_req_t mr; 7254 ddi_acc_hdl_t *hp; 7255 int result; 7256 7257 /* 7258 * Allocate and initialize the common elements of data access handle. 7259 */ 7260 *handle = impl_acc_hdl_alloc(KM_SLEEP, NULL); 7261 hp = impl_acc_hdl_get(*handle); 7262 hp->ah_vers = VERS_ACCHDL; 7263 hp->ah_dip = dip; 7264 hp->ah_rnumber = rnumber; 7265 hp->ah_offset = offset; 7266 hp->ah_len = len; 7267 hp->ah_acc = *accattrp; 7268 7269 /* 7270 * Set up the mapping request and call to parent. 7271 */ 7272 mr.map_op = DDI_MO_MAP_LOCKED; 7273 mr.map_type = DDI_MT_RNUMBER; 7274 mr.map_obj.rnumber = rnumber; 7275 mr.map_prot = PROT_READ | PROT_WRITE; 7276 mr.map_flags = DDI_MF_KERNEL_MAPPING; 7277 mr.map_handlep = hp; 7278 mr.map_vers = DDI_MAP_VERSION; 7279 result = ddi_map(dip, &mr, offset, len, addrp); 7280 7281 /* 7282 * check for end result 7283 */ 7284 if (result != DDI_SUCCESS) { 7285 impl_acc_hdl_free(*handle); 7286 *handle = (ddi_acc_handle_t)NULL; 7287 } else { 7288 hp->ah_addr = *addrp; 7289 } 7290 7291 return (result); 7292 } 7293 7294 void 7295 ddi_regs_map_free(ddi_acc_handle_t *handlep) 7296 { 7297 ddi_map_req_t mr; 7298 ddi_acc_hdl_t *hp; 7299 7300 hp = impl_acc_hdl_get(*handlep); 7301 ASSERT(hp); 7302 7303 mr.map_op = DDI_MO_UNMAP; 7304 mr.map_type = DDI_MT_RNUMBER; 7305 mr.map_obj.rnumber = hp->ah_rnumber; 7306 mr.map_prot = PROT_READ | PROT_WRITE; 7307 mr.map_flags = DDI_MF_KERNEL_MAPPING; 7308 mr.map_handlep = hp; 7309 mr.map_vers = DDI_MAP_VERSION; 7310 7311 /* 7312 * Call my parent to unmap my regs. 7313 */ 7314 (void) ddi_map(hp->ah_dip, &mr, hp->ah_offset, 7315 hp->ah_len, &hp->ah_addr); 7316 /* 7317 * free the handle 7318 */ 7319 impl_acc_hdl_free(*handlep); 7320 *handlep = (ddi_acc_handle_t)NULL; 7321 } 7322 7323 int 7324 ddi_device_zero(ddi_acc_handle_t handle, caddr_t dev_addr, size_t bytecount, 7325 ssize_t dev_advcnt, uint_t dev_datasz) 7326 { 7327 uint8_t *b; 7328 uint16_t *w; 7329 uint32_t *l; 7330 uint64_t *ll; 7331 7332 /* check for total byte count is multiple of data transfer size */ 7333 if (bytecount != ((bytecount / dev_datasz) * dev_datasz)) 7334 return (DDI_FAILURE); 7335 7336 switch (dev_datasz) { 7337 case DDI_DATA_SZ01_ACC: 7338 for (b = (uint8_t *)dev_addr; 7339 bytecount != 0; bytecount -= 1, b += dev_advcnt) 7340 ddi_put8(handle, b, 0); 7341 break; 7342 case DDI_DATA_SZ02_ACC: 7343 for (w = (uint16_t *)dev_addr; 7344 bytecount != 0; bytecount -= 2, w += dev_advcnt) 7345 ddi_put16(handle, w, 0); 7346 break; 7347 case DDI_DATA_SZ04_ACC: 7348 for (l = (uint32_t *)dev_addr; 7349 bytecount != 0; bytecount -= 4, l += dev_advcnt) 7350 ddi_put32(handle, l, 0); 7351 break; 7352 case DDI_DATA_SZ08_ACC: 7353 for (ll = (uint64_t *)dev_addr; 7354 bytecount != 0; bytecount -= 8, ll += dev_advcnt) 7355 ddi_put64(handle, ll, 0x0ll); 7356 break; 7357 default: 7358 return (DDI_FAILURE); 7359 } 7360 return (DDI_SUCCESS); 7361 } 7362 7363 int 7364 ddi_device_copy( 7365 ddi_acc_handle_t src_handle, caddr_t src_addr, ssize_t src_advcnt, 7366 ddi_acc_handle_t dest_handle, caddr_t dest_addr, ssize_t dest_advcnt, 7367 size_t bytecount, uint_t dev_datasz) 7368 { 7369 uint8_t *b_src, *b_dst; 7370 uint16_t *w_src, *w_dst; 7371 uint32_t *l_src, *l_dst; 7372 uint64_t *ll_src, *ll_dst; 7373 7374 /* check for total byte count is multiple of data transfer size */ 7375 if (bytecount != ((bytecount / dev_datasz) * dev_datasz)) 7376 return (DDI_FAILURE); 7377 7378 switch (dev_datasz) { 7379 case DDI_DATA_SZ01_ACC: 7380 b_src = (uint8_t *)src_addr; 7381 b_dst = (uint8_t *)dest_addr; 7382 7383 for (; bytecount != 0; bytecount -= 1) { 7384 ddi_put8(dest_handle, b_dst, 7385 ddi_get8(src_handle, b_src)); 7386 b_dst += dest_advcnt; 7387 b_src += src_advcnt; 7388 } 7389 break; 7390 case DDI_DATA_SZ02_ACC: 7391 w_src = (uint16_t *)src_addr; 7392 w_dst = (uint16_t *)dest_addr; 7393 7394 for (; bytecount != 0; bytecount -= 2) { 7395 ddi_put16(dest_handle, w_dst, 7396 ddi_get16(src_handle, w_src)); 7397 w_dst += dest_advcnt; 7398 w_src += src_advcnt; 7399 } 7400 break; 7401 case DDI_DATA_SZ04_ACC: 7402 l_src = (uint32_t *)src_addr; 7403 l_dst = (uint32_t *)dest_addr; 7404 7405 for (; bytecount != 0; bytecount -= 4) { 7406 ddi_put32(dest_handle, l_dst, 7407 ddi_get32(src_handle, l_src)); 7408 l_dst += dest_advcnt; 7409 l_src += src_advcnt; 7410 } 7411 break; 7412 case DDI_DATA_SZ08_ACC: 7413 ll_src = (uint64_t *)src_addr; 7414 ll_dst = (uint64_t *)dest_addr; 7415 7416 for (; bytecount != 0; bytecount -= 8) { 7417 ddi_put64(dest_handle, ll_dst, 7418 ddi_get64(src_handle, ll_src)); 7419 ll_dst += dest_advcnt; 7420 ll_src += src_advcnt; 7421 } 7422 break; 7423 default: 7424 return (DDI_FAILURE); 7425 } 7426 return (DDI_SUCCESS); 7427 } 7428 7429 #define swap16(value) \ 7430 ((((value) & 0xff) << 8) | ((value) >> 8)) 7431 7432 #define swap32(value) \ 7433 (((uint32_t)swap16((uint16_t)((value) & 0xffff)) << 16) | \ 7434 (uint32_t)swap16((uint16_t)((value) >> 16))) 7435 7436 #define swap64(value) \ 7437 (((uint64_t)swap32((uint32_t)((value) & 0xffffffff)) \ 7438 << 32) | \ 7439 (uint64_t)swap32((uint32_t)((value) >> 32))) 7440 7441 uint16_t 7442 ddi_swap16(uint16_t value) 7443 { 7444 return (swap16(value)); 7445 } 7446 7447 uint32_t 7448 ddi_swap32(uint32_t value) 7449 { 7450 return (swap32(value)); 7451 } 7452 7453 uint64_t 7454 ddi_swap64(uint64_t value) 7455 { 7456 return (swap64(value)); 7457 } 7458 7459 /* 7460 * Convert a binding name to a driver name. 7461 * A binding name is the name used to determine the driver for a 7462 * device - it may be either an alias for the driver or the name 7463 * of the driver itself. 7464 */ 7465 char * 7466 i_binding_to_drv_name(char *bname) 7467 { 7468 major_t major_no; 7469 7470 ASSERT(bname != NULL); 7471 7472 if ((major_no = ddi_name_to_major(bname)) == -1) 7473 return (NULL); 7474 return (ddi_major_to_name(major_no)); 7475 } 7476 7477 /* 7478 * Search for minor name that has specified dev_t and spec_type. 7479 * If spec_type is zero then any dev_t match works. Since we 7480 * are returning a pointer to the minor name string, we require the 7481 * caller to do the locking. 7482 */ 7483 char * 7484 i_ddi_devtspectype_to_minorname(dev_info_t *dip, dev_t dev, int spec_type) 7485 { 7486 struct ddi_minor_data *dmdp; 7487 7488 /* 7489 * The did layered driver currently intentionally returns a 7490 * devinfo ptr for an underlying sd instance based on a did 7491 * dev_t. In this case it is not an error. 7492 * 7493 * The did layered driver is associated with Sun Cluster. 7494 */ 7495 ASSERT((ddi_driver_major(dip) == getmajor(dev)) || 7496 (strcmp(ddi_major_to_name(getmajor(dev)), "did") == 0)); 7497 7498 ASSERT(DEVI_BUSY_OWNED(dip)); 7499 for (dmdp = DEVI(dip)->devi_minor; dmdp; dmdp = dmdp->next) { 7500 if (((dmdp->type == DDM_MINOR) || 7501 (dmdp->type == DDM_INTERNAL_PATH) || 7502 (dmdp->type == DDM_DEFAULT)) && 7503 (dmdp->ddm_dev == dev) && 7504 ((((spec_type & (S_IFCHR|S_IFBLK))) == 0) || 7505 (dmdp->ddm_spec_type == spec_type))) 7506 return (dmdp->ddm_name); 7507 } 7508 7509 return (NULL); 7510 } 7511 7512 /* 7513 * Find the devt and spectype of the specified minor_name. 7514 * Return DDI_FAILURE if minor_name not found. Since we are 7515 * returning everything via arguments we can do the locking. 7516 */ 7517 int 7518 i_ddi_minorname_to_devtspectype(dev_info_t *dip, char *minor_name, 7519 dev_t *devtp, int *spectypep) 7520 { 7521 int circ; 7522 struct ddi_minor_data *dmdp; 7523 7524 /* deal with clone minor nodes */ 7525 if (dip == clone_dip) { 7526 major_t major; 7527 /* 7528 * Make sure minor_name is a STREAMS driver. 7529 * We load the driver but don't attach to any instances. 7530 */ 7531 7532 major = ddi_name_to_major(minor_name); 7533 if (major == DDI_MAJOR_T_NONE) 7534 return (DDI_FAILURE); 7535 7536 if (ddi_hold_driver(major) == NULL) 7537 return (DDI_FAILURE); 7538 7539 if (STREAMSTAB(major) == NULL) { 7540 ddi_rele_driver(major); 7541 return (DDI_FAILURE); 7542 } 7543 ddi_rele_driver(major); 7544 7545 if (devtp) 7546 *devtp = makedevice(clone_major, (minor_t)major); 7547 7548 if (spectypep) 7549 *spectypep = S_IFCHR; 7550 7551 return (DDI_SUCCESS); 7552 } 7553 7554 ndi_devi_enter(dip, &circ); 7555 for (dmdp = DEVI(dip)->devi_minor; dmdp; dmdp = dmdp->next) { 7556 if (((dmdp->type != DDM_MINOR) && 7557 (dmdp->type != DDM_INTERNAL_PATH) && 7558 (dmdp->type != DDM_DEFAULT)) || 7559 strcmp(minor_name, dmdp->ddm_name)) 7560 continue; 7561 7562 if (devtp) 7563 *devtp = dmdp->ddm_dev; 7564 7565 if (spectypep) 7566 *spectypep = dmdp->ddm_spec_type; 7567 7568 ndi_devi_exit(dip, circ); 7569 return (DDI_SUCCESS); 7570 } 7571 ndi_devi_exit(dip, circ); 7572 7573 return (DDI_FAILURE); 7574 } 7575 7576 static kmutex_t devid_gen_mutex; 7577 static short devid_gen_number; 7578 7579 #ifdef DEBUG 7580 7581 static int devid_register_corrupt = 0; 7582 static int devid_register_corrupt_major = 0; 7583 static int devid_register_corrupt_hint = 0; 7584 static int devid_register_corrupt_hint_major = 0; 7585 7586 static int devid_lyr_debug = 0; 7587 7588 #define DDI_DEBUG_DEVID_DEVTS(msg, ndevs, devs) \ 7589 if (devid_lyr_debug) \ 7590 ddi_debug_devid_devts(msg, ndevs, devs) 7591 7592 #else 7593 7594 #define DDI_DEBUG_DEVID_DEVTS(msg, ndevs, devs) 7595 7596 #endif /* DEBUG */ 7597 7598 7599 #ifdef DEBUG 7600 7601 static void 7602 ddi_debug_devid_devts(char *msg, int ndevs, dev_t *devs) 7603 { 7604 int i; 7605 7606 cmn_err(CE_CONT, "%s:\n", msg); 7607 for (i = 0; i < ndevs; i++) { 7608 cmn_err(CE_CONT, " 0x%lx\n", devs[i]); 7609 } 7610 } 7611 7612 static void 7613 ddi_debug_devid_paths(char *msg, int npaths, char **paths) 7614 { 7615 int i; 7616 7617 cmn_err(CE_CONT, "%s:\n", msg); 7618 for (i = 0; i < npaths; i++) { 7619 cmn_err(CE_CONT, " %s\n", paths[i]); 7620 } 7621 } 7622 7623 static void 7624 ddi_debug_devid_devts_per_path(char *path, int ndevs, dev_t *devs) 7625 { 7626 int i; 7627 7628 cmn_err(CE_CONT, "dev_ts per path %s\n", path); 7629 for (i = 0; i < ndevs; i++) { 7630 cmn_err(CE_CONT, " 0x%lx\n", devs[i]); 7631 } 7632 } 7633 7634 #endif /* DEBUG */ 7635 7636 /* 7637 * Register device id into DDI framework. 7638 * Must be called when the driver is bound. 7639 */ 7640 static int 7641 i_ddi_devid_register(dev_info_t *dip, ddi_devid_t devid) 7642 { 7643 impl_devid_t *i_devid = (impl_devid_t *)devid; 7644 size_t driver_len; 7645 const char *driver_name; 7646 char *devid_str; 7647 major_t major; 7648 7649 if ((dip == NULL) || 7650 ((major = ddi_driver_major(dip)) == DDI_MAJOR_T_NONE)) 7651 return (DDI_FAILURE); 7652 7653 /* verify that the devid is valid */ 7654 if (ddi_devid_valid(devid) != DDI_SUCCESS) 7655 return (DDI_FAILURE); 7656 7657 /* Updating driver name hint in devid */ 7658 driver_name = ddi_driver_name(dip); 7659 driver_len = strlen(driver_name); 7660 if (driver_len > DEVID_HINT_SIZE) { 7661 /* Pick up last four characters of driver name */ 7662 driver_name += driver_len - DEVID_HINT_SIZE; 7663 driver_len = DEVID_HINT_SIZE; 7664 } 7665 bzero(i_devid->did_driver, DEVID_HINT_SIZE); 7666 bcopy(driver_name, i_devid->did_driver, driver_len); 7667 7668 #ifdef DEBUG 7669 /* Corrupt the devid for testing. */ 7670 if (devid_register_corrupt) 7671 i_devid->did_id[0] += devid_register_corrupt; 7672 if (devid_register_corrupt_major && 7673 (major == devid_register_corrupt_major)) 7674 i_devid->did_id[0] += 1; 7675 if (devid_register_corrupt_hint) 7676 i_devid->did_driver[0] += devid_register_corrupt_hint; 7677 if (devid_register_corrupt_hint_major && 7678 (major == devid_register_corrupt_hint_major)) 7679 i_devid->did_driver[0] += 1; 7680 #endif /* DEBUG */ 7681 7682 /* encode the devid as a string */ 7683 if ((devid_str = ddi_devid_str_encode(devid, NULL)) == NULL) 7684 return (DDI_FAILURE); 7685 7686 /* add string as a string property */ 7687 if (ndi_prop_update_string(DDI_DEV_T_NONE, dip, 7688 DEVID_PROP_NAME, devid_str) != DDI_SUCCESS) { 7689 cmn_err(CE_WARN, "%s%d: devid property update failed", 7690 ddi_driver_name(dip), ddi_get_instance(dip)); 7691 ddi_devid_str_free(devid_str); 7692 return (DDI_FAILURE); 7693 } 7694 7695 /* keep pointer to devid string for interrupt context fma code */ 7696 if (DEVI(dip)->devi_devid_str) 7697 ddi_devid_str_free(DEVI(dip)->devi_devid_str); 7698 DEVI(dip)->devi_devid_str = devid_str; 7699 return (DDI_SUCCESS); 7700 } 7701 7702 int 7703 ddi_devid_register(dev_info_t *dip, ddi_devid_t devid) 7704 { 7705 int rval; 7706 7707 rval = i_ddi_devid_register(dip, devid); 7708 if (rval == DDI_SUCCESS) { 7709 /* 7710 * Register devid in devid-to-path cache 7711 */ 7712 if (e_devid_cache_register(dip, devid) == DDI_SUCCESS) { 7713 mutex_enter(&DEVI(dip)->devi_lock); 7714 DEVI(dip)->devi_flags |= DEVI_CACHED_DEVID; 7715 mutex_exit(&DEVI(dip)->devi_lock); 7716 } else if (ddi_get_name_addr(dip)) { 7717 /* 7718 * We only expect cache_register DDI_FAILURE when we 7719 * can't form the full path because of NULL devi_addr. 7720 */ 7721 cmn_err(CE_WARN, "%s%d: failed to cache devid", 7722 ddi_driver_name(dip), ddi_get_instance(dip)); 7723 } 7724 } else { 7725 cmn_err(CE_WARN, "%s%d: failed to register devid", 7726 ddi_driver_name(dip), ddi_get_instance(dip)); 7727 } 7728 return (rval); 7729 } 7730 7731 /* 7732 * Remove (unregister) device id from DDI framework. 7733 * Must be called when device is detached. 7734 */ 7735 static void 7736 i_ddi_devid_unregister(dev_info_t *dip) 7737 { 7738 if (DEVI(dip)->devi_devid_str) { 7739 ddi_devid_str_free(DEVI(dip)->devi_devid_str); 7740 DEVI(dip)->devi_devid_str = NULL; 7741 } 7742 7743 /* remove the devid property */ 7744 (void) ndi_prop_remove(DDI_DEV_T_NONE, dip, DEVID_PROP_NAME); 7745 } 7746 7747 void 7748 ddi_devid_unregister(dev_info_t *dip) 7749 { 7750 mutex_enter(&DEVI(dip)->devi_lock); 7751 DEVI(dip)->devi_flags &= ~DEVI_CACHED_DEVID; 7752 mutex_exit(&DEVI(dip)->devi_lock); 7753 e_devid_cache_unregister(dip); 7754 i_ddi_devid_unregister(dip); 7755 } 7756 7757 /* 7758 * Allocate and initialize a device id. 7759 */ 7760 int 7761 ddi_devid_init( 7762 dev_info_t *dip, 7763 ushort_t devid_type, 7764 ushort_t nbytes, 7765 void *id, 7766 ddi_devid_t *ret_devid) 7767 { 7768 impl_devid_t *i_devid; 7769 int sz = sizeof (*i_devid) + nbytes - sizeof (char); 7770 int driver_len; 7771 const char *driver_name; 7772 7773 switch (devid_type) { 7774 case DEVID_SCSI3_WWN: 7775 /*FALLTHRU*/ 7776 case DEVID_SCSI_SERIAL: 7777 /*FALLTHRU*/ 7778 case DEVID_ATA_SERIAL: 7779 /*FALLTHRU*/ 7780 case DEVID_ENCAP: 7781 if (nbytes == 0) 7782 return (DDI_FAILURE); 7783 if (id == NULL) 7784 return (DDI_FAILURE); 7785 break; 7786 case DEVID_FAB: 7787 if (nbytes != 0) 7788 return (DDI_FAILURE); 7789 if (id != NULL) 7790 return (DDI_FAILURE); 7791 nbytes = sizeof (int) + 7792 sizeof (struct timeval32) + sizeof (short); 7793 sz += nbytes; 7794 break; 7795 default: 7796 return (DDI_FAILURE); 7797 } 7798 7799 if ((i_devid = kmem_zalloc(sz, KM_SLEEP)) == NULL) 7800 return (DDI_FAILURE); 7801 7802 i_devid->did_magic_hi = DEVID_MAGIC_MSB; 7803 i_devid->did_magic_lo = DEVID_MAGIC_LSB; 7804 i_devid->did_rev_hi = DEVID_REV_MSB; 7805 i_devid->did_rev_lo = DEVID_REV_LSB; 7806 DEVID_FORMTYPE(i_devid, devid_type); 7807 DEVID_FORMLEN(i_devid, nbytes); 7808 7809 /* Fill in driver name hint */ 7810 driver_name = ddi_driver_name(dip); 7811 driver_len = strlen(driver_name); 7812 if (driver_len > DEVID_HINT_SIZE) { 7813 /* Pick up last four characters of driver name */ 7814 driver_name += driver_len - DEVID_HINT_SIZE; 7815 driver_len = DEVID_HINT_SIZE; 7816 } 7817 7818 bcopy(driver_name, i_devid->did_driver, driver_len); 7819 7820 /* Fill in id field */ 7821 if (devid_type == DEVID_FAB) { 7822 char *cp; 7823 uint32_t hostid; 7824 struct timeval32 timestamp32; 7825 int i; 7826 int *ip; 7827 short gen; 7828 7829 /* increase the generation number */ 7830 mutex_enter(&devid_gen_mutex); 7831 gen = devid_gen_number++; 7832 mutex_exit(&devid_gen_mutex); 7833 7834 cp = i_devid->did_id; 7835 7836 /* Fill in host id (big-endian byte ordering) */ 7837 hostid = zone_get_hostid(NULL); 7838 *cp++ = hibyte(hiword(hostid)); 7839 *cp++ = lobyte(hiword(hostid)); 7840 *cp++ = hibyte(loword(hostid)); 7841 *cp++ = lobyte(loword(hostid)); 7842 7843 /* 7844 * Fill in timestamp (big-endian byte ordering) 7845 * 7846 * (Note that the format may have to be changed 7847 * before 2038 comes around, though it's arguably 7848 * unique enough as it is..) 7849 */ 7850 uniqtime32(×tamp32); 7851 ip = (int *)×tamp32; 7852 for (i = 0; 7853 i < sizeof (timestamp32) / sizeof (int); i++, ip++) { 7854 int val; 7855 val = *ip; 7856 *cp++ = hibyte(hiword(val)); 7857 *cp++ = lobyte(hiword(val)); 7858 *cp++ = hibyte(loword(val)); 7859 *cp++ = lobyte(loword(val)); 7860 } 7861 7862 /* fill in the generation number */ 7863 *cp++ = hibyte(gen); 7864 *cp++ = lobyte(gen); 7865 } else 7866 bcopy(id, i_devid->did_id, nbytes); 7867 7868 /* return device id */ 7869 *ret_devid = (ddi_devid_t)i_devid; 7870 return (DDI_SUCCESS); 7871 } 7872 7873 int 7874 ddi_devid_get(dev_info_t *dip, ddi_devid_t *ret_devid) 7875 { 7876 return (i_ddi_devi_get_devid(DDI_DEV_T_ANY, dip, ret_devid)); 7877 } 7878 7879 int 7880 i_ddi_devi_get_devid(dev_t dev, dev_info_t *dip, ddi_devid_t *ret_devid) 7881 { 7882 char *devidstr; 7883 7884 ASSERT(dev != DDI_DEV_T_NONE); 7885 7886 /* look up the property, devt specific first */ 7887 if (ddi_prop_lookup_string(dev, dip, DDI_PROP_DONTPASS, 7888 DEVID_PROP_NAME, &devidstr) != DDI_PROP_SUCCESS) { 7889 if ((dev == DDI_DEV_T_ANY) || 7890 (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, 7891 DDI_PROP_DONTPASS, DEVID_PROP_NAME, &devidstr) != 7892 DDI_PROP_SUCCESS)) { 7893 return (DDI_FAILURE); 7894 } 7895 } 7896 7897 /* convert to binary form */ 7898 if (ddi_devid_str_decode(devidstr, ret_devid, NULL) == -1) { 7899 ddi_prop_free(devidstr); 7900 return (DDI_FAILURE); 7901 } 7902 ddi_prop_free(devidstr); 7903 return (DDI_SUCCESS); 7904 } 7905 7906 /* 7907 * Return a copy of the device id for dev_t 7908 */ 7909 int 7910 ddi_lyr_get_devid(dev_t dev, ddi_devid_t *ret_devid) 7911 { 7912 dev_info_t *dip; 7913 int rval; 7914 7915 /* get the dip */ 7916 if ((dip = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 7917 return (DDI_FAILURE); 7918 7919 rval = i_ddi_devi_get_devid(dev, dip, ret_devid); 7920 7921 ddi_release_devi(dip); /* e_ddi_hold_devi_by_dev() */ 7922 return (rval); 7923 } 7924 7925 /* 7926 * Return a copy of the minor name for dev_t and spec_type 7927 */ 7928 int 7929 ddi_lyr_get_minor_name(dev_t dev, int spec_type, char **minor_name) 7930 { 7931 char *buf; 7932 int circ; 7933 dev_info_t *dip; 7934 char *nm; 7935 int rval; 7936 7937 if ((dip = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) { 7938 *minor_name = NULL; 7939 return (DDI_FAILURE); 7940 } 7941 7942 /* Find the minor name and copy into max size buf */ 7943 buf = kmem_alloc(MAXNAMELEN, KM_SLEEP); 7944 ndi_devi_enter(dip, &circ); 7945 nm = i_ddi_devtspectype_to_minorname(dip, dev, spec_type); 7946 if (nm) 7947 (void) strcpy(buf, nm); 7948 ndi_devi_exit(dip, circ); 7949 ddi_release_devi(dip); /* e_ddi_hold_devi_by_dev() */ 7950 7951 if (nm) { 7952 /* duplicate into min size buf for return result */ 7953 *minor_name = i_ddi_strdup(buf, KM_SLEEP); 7954 rval = DDI_SUCCESS; 7955 } else { 7956 *minor_name = NULL; 7957 rval = DDI_FAILURE; 7958 } 7959 7960 /* free max size buf and return */ 7961 kmem_free(buf, MAXNAMELEN); 7962 return (rval); 7963 } 7964 7965 int 7966 ddi_lyr_devid_to_devlist( 7967 ddi_devid_t devid, 7968 char *minor_name, 7969 int *retndevs, 7970 dev_t **retdevs) 7971 { 7972 ASSERT(ddi_devid_valid(devid) == DDI_SUCCESS); 7973 7974 if (e_devid_cache_to_devt_list(devid, minor_name, 7975 retndevs, retdevs) == DDI_SUCCESS) { 7976 ASSERT(*retndevs > 0); 7977 DDI_DEBUG_DEVID_DEVTS("ddi_lyr_devid_to_devlist", 7978 *retndevs, *retdevs); 7979 return (DDI_SUCCESS); 7980 } 7981 7982 if (e_ddi_devid_discovery(devid) == DDI_FAILURE) { 7983 return (DDI_FAILURE); 7984 } 7985 7986 if (e_devid_cache_to_devt_list(devid, minor_name, 7987 retndevs, retdevs) == DDI_SUCCESS) { 7988 ASSERT(*retndevs > 0); 7989 DDI_DEBUG_DEVID_DEVTS("ddi_lyr_devid_to_devlist", 7990 *retndevs, *retdevs); 7991 return (DDI_SUCCESS); 7992 } 7993 7994 return (DDI_FAILURE); 7995 } 7996 7997 void 7998 ddi_lyr_free_devlist(dev_t *devlist, int ndevs) 7999 { 8000 kmem_free(devlist, sizeof (dev_t) * ndevs); 8001 } 8002 8003 /* 8004 * Note: This will need to be fixed if we ever allow processes to 8005 * have more than one data model per exec. 8006 */ 8007 model_t 8008 ddi_mmap_get_model(void) 8009 { 8010 return (get_udatamodel()); 8011 } 8012 8013 model_t 8014 ddi_model_convert_from(model_t model) 8015 { 8016 return ((model & DDI_MODEL_MASK) & ~DDI_MODEL_NATIVE); 8017 } 8018 8019 /* 8020 * ddi interfaces managing storage and retrieval of eventcookies. 8021 */ 8022 8023 /* 8024 * Invoke bus nexus driver's implementation of the 8025 * (*bus_remove_eventcall)() interface to remove a registered 8026 * callback handler for "event". 8027 */ 8028 int 8029 ddi_remove_event_handler(ddi_callback_id_t id) 8030 { 8031 ndi_event_callbacks_t *cb = (ndi_event_callbacks_t *)id; 8032 dev_info_t *ddip; 8033 8034 ASSERT(cb); 8035 if (!cb) { 8036 return (DDI_FAILURE); 8037 } 8038 8039 ddip = NDI_EVENT_DDIP(cb->ndi_evtcb_cookie); 8040 return (ndi_busop_remove_eventcall(ddip, id)); 8041 } 8042 8043 /* 8044 * Invoke bus nexus driver's implementation of the 8045 * (*bus_add_eventcall)() interface to register a callback handler 8046 * for "event". 8047 */ 8048 int 8049 ddi_add_event_handler(dev_info_t *dip, ddi_eventcookie_t event, 8050 void (*handler)(dev_info_t *, ddi_eventcookie_t, void *, void *), 8051 void *arg, ddi_callback_id_t *id) 8052 { 8053 return (ndi_busop_add_eventcall(dip, dip, event, handler, arg, id)); 8054 } 8055 8056 8057 /* 8058 * Return a handle for event "name" by calling up the device tree 8059 * hierarchy via (*bus_get_eventcookie)() interface until claimed 8060 * by a bus nexus or top of dev_info tree is reached. 8061 */ 8062 int 8063 ddi_get_eventcookie(dev_info_t *dip, char *name, 8064 ddi_eventcookie_t *event_cookiep) 8065 { 8066 return (ndi_busop_get_eventcookie(dip, dip, 8067 name, event_cookiep)); 8068 } 8069 8070 /* 8071 * This procedure is provided as the general callback function when 8072 * umem_lockmemory calls as_add_callback for long term memory locking. 8073 * When as_unmap, as_setprot, or as_free encounter segments which have 8074 * locked memory, this callback will be invoked. 8075 */ 8076 void 8077 umem_lock_undo(struct as *as, void *arg, uint_t event) 8078 { 8079 _NOTE(ARGUNUSED(as, event)) 8080 struct ddi_umem_cookie *cp = (struct ddi_umem_cookie *)arg; 8081 8082 /* 8083 * Call the cleanup function. Decrement the cookie reference 8084 * count, if it goes to zero, return the memory for the cookie. 8085 * The i_ddi_umem_unlock for this cookie may or may not have been 8086 * called already. It is the responsibility of the caller of 8087 * umem_lockmemory to handle the case of the cleanup routine 8088 * being called after a ddi_umem_unlock for the cookie 8089 * was called. 8090 */ 8091 8092 (*cp->callbacks.cbo_umem_lock_cleanup)((ddi_umem_cookie_t)cp); 8093 8094 /* remove the cookie if reference goes to zero */ 8095 if (atomic_dec_ulong_nv((ulong_t *)(&(cp->cook_refcnt))) == 0) { 8096 kmem_free(cp, sizeof (struct ddi_umem_cookie)); 8097 } 8098 } 8099 8100 /* 8101 * The following two Consolidation Private routines provide generic 8102 * interfaces to increase/decrease the amount of device-locked memory. 8103 * 8104 * To keep project_rele and project_hold consistent, i_ddi_decr_locked_memory() 8105 * must be called every time i_ddi_incr_locked_memory() is called. 8106 */ 8107 int 8108 /* ARGSUSED */ 8109 i_ddi_incr_locked_memory(proc_t *procp, rctl_qty_t inc) 8110 { 8111 ASSERT(procp != NULL); 8112 mutex_enter(&procp->p_lock); 8113 if (rctl_incr_locked_mem(procp, NULL, inc, 1)) { 8114 mutex_exit(&procp->p_lock); 8115 return (ENOMEM); 8116 } 8117 mutex_exit(&procp->p_lock); 8118 return (0); 8119 } 8120 8121 /* 8122 * To keep project_rele and project_hold consistent, i_ddi_incr_locked_memory() 8123 * must be called every time i_ddi_decr_locked_memory() is called. 8124 */ 8125 /* ARGSUSED */ 8126 void 8127 i_ddi_decr_locked_memory(proc_t *procp, rctl_qty_t dec) 8128 { 8129 ASSERT(procp != NULL); 8130 mutex_enter(&procp->p_lock); 8131 rctl_decr_locked_mem(procp, NULL, dec, 1); 8132 mutex_exit(&procp->p_lock); 8133 } 8134 8135 /* 8136 * The cookie->upd_max_lock_rctl flag is used to determine if we should 8137 * charge device locked memory to the max-locked-memory rctl. Tracking 8138 * device locked memory causes the rctl locks to get hot under high-speed 8139 * I/O such as RDSv3 over IB. If there is no max-locked-memory rctl limit, 8140 * we bypass charging the locked memory to the rctl altogether. The cookie's 8141 * flag tells us if the rctl value should be updated when unlocking the memory, 8142 * in case the rctl gets changed after the memory was locked. Any device 8143 * locked memory in that rare case will not be counted toward the rctl limit. 8144 * 8145 * When tracking the locked memory, the kproject_t parameter is always NULL 8146 * in the code paths: 8147 * i_ddi_incr_locked_memory -> rctl_incr_locked_mem 8148 * i_ddi_decr_locked_memory -> rctl_decr_locked_mem 8149 * Thus, we always use the tk_proj member to check the projp setting. 8150 */ 8151 static void 8152 init_lockedmem_rctl_flag(struct ddi_umem_cookie *cookie) 8153 { 8154 proc_t *p; 8155 kproject_t *projp; 8156 zone_t *zonep; 8157 8158 ASSERT(cookie); 8159 p = cookie->procp; 8160 ASSERT(p); 8161 8162 zonep = p->p_zone; 8163 projp = p->p_task->tk_proj; 8164 8165 ASSERT(zonep); 8166 ASSERT(projp); 8167 8168 if (zonep->zone_locked_mem_ctl == UINT64_MAX && 8169 projp->kpj_data.kpd_locked_mem_ctl == UINT64_MAX) 8170 cookie->upd_max_lock_rctl = 0; 8171 else 8172 cookie->upd_max_lock_rctl = 1; 8173 } 8174 8175 /* 8176 * This routine checks if the max-locked-memory resource ctl is 8177 * exceeded, if not increments it, grabs a hold on the project. 8178 * Returns 0 if successful otherwise returns error code 8179 */ 8180 static int 8181 umem_incr_devlockmem(struct ddi_umem_cookie *cookie) 8182 { 8183 proc_t *procp; 8184 int ret; 8185 8186 ASSERT(cookie); 8187 if (cookie->upd_max_lock_rctl == 0) 8188 return (0); 8189 8190 procp = cookie->procp; 8191 ASSERT(procp); 8192 8193 if ((ret = i_ddi_incr_locked_memory(procp, 8194 cookie->size)) != 0) { 8195 return (ret); 8196 } 8197 return (0); 8198 } 8199 8200 /* 8201 * Decrements the max-locked-memory resource ctl and releases 8202 * the hold on the project that was acquired during umem_incr_devlockmem 8203 */ 8204 static void 8205 umem_decr_devlockmem(struct ddi_umem_cookie *cookie) 8206 { 8207 proc_t *proc; 8208 8209 if (cookie->upd_max_lock_rctl == 0) 8210 return; 8211 8212 proc = (proc_t *)cookie->procp; 8213 if (!proc) 8214 return; 8215 8216 i_ddi_decr_locked_memory(proc, cookie->size); 8217 } 8218 8219 /* 8220 * A consolidation private function which is essentially equivalent to 8221 * ddi_umem_lock but with the addition of arguments ops_vector and procp. 8222 * A call to as_add_callback is done if DDI_UMEMLOCK_LONGTERM is set, and 8223 * the ops_vector is valid. 8224 * 8225 * Lock the virtual address range in the current process and create a 8226 * ddi_umem_cookie (of type UMEM_LOCKED). This can be used to pass to 8227 * ddi_umem_iosetup to create a buf or do devmap_umem_setup/remap to export 8228 * to user space. 8229 * 8230 * Note: The resource control accounting currently uses a full charge model 8231 * in other words attempts to lock the same/overlapping areas of memory 8232 * will deduct the full size of the buffer from the projects running 8233 * counter for the device locked memory. 8234 * 8235 * addr, size should be PAGESIZE aligned 8236 * 8237 * flags - DDI_UMEMLOCK_READ, DDI_UMEMLOCK_WRITE or both 8238 * identifies whether the locked memory will be read or written or both 8239 * DDI_UMEMLOCK_LONGTERM must be set when the locking will 8240 * be maintained for an indefinitely long period (essentially permanent), 8241 * rather than for what would be required for a typical I/O completion. 8242 * When DDI_UMEMLOCK_LONGTERM is set, umem_lockmemory will return EFAULT 8243 * if the memory pertains to a regular file which is mapped MAP_SHARED. 8244 * This is to prevent a deadlock if a file truncation is attempted after 8245 * after the locking is done. 8246 * 8247 * Returns 0 on success 8248 * EINVAL - for invalid parameters 8249 * EPERM, ENOMEM and other error codes returned by as_pagelock 8250 * ENOMEM - is returned if the current request to lock memory exceeds 8251 * *.max-locked-memory resource control value. 8252 * EFAULT - memory pertains to a regular file mapped shared and 8253 * and DDI_UMEMLOCK_LONGTERM flag is set 8254 * EAGAIN - could not start the ddi_umem_unlock list processing thread 8255 */ 8256 int 8257 umem_lockmemory(caddr_t addr, size_t len, int flags, ddi_umem_cookie_t *cookie, 8258 struct umem_callback_ops *ops_vector, 8259 proc_t *procp) 8260 { 8261 int error; 8262 struct ddi_umem_cookie *p; 8263 void (*driver_callback)() = NULL; 8264 struct as *as; 8265 struct seg *seg; 8266 vnode_t *vp; 8267 8268 /* Allow device drivers to not have to reference "curproc" */ 8269 if (procp == NULL) 8270 procp = curproc; 8271 as = procp->p_as; 8272 *cookie = NULL; /* in case of any error return */ 8273 8274 /* These are the only three valid flags */ 8275 if ((flags & ~(DDI_UMEMLOCK_READ | DDI_UMEMLOCK_WRITE | 8276 DDI_UMEMLOCK_LONGTERM)) != 0) 8277 return (EINVAL); 8278 8279 /* At least one (can be both) of the two access flags must be set */ 8280 if ((flags & (DDI_UMEMLOCK_READ | DDI_UMEMLOCK_WRITE)) == 0) 8281 return (EINVAL); 8282 8283 /* addr and len must be page-aligned */ 8284 if (((uintptr_t)addr & PAGEOFFSET) != 0) 8285 return (EINVAL); 8286 8287 if ((len & PAGEOFFSET) != 0) 8288 return (EINVAL); 8289 8290 /* 8291 * For longterm locking a driver callback must be specified; if 8292 * not longterm then a callback is optional. 8293 */ 8294 if (ops_vector != NULL) { 8295 if (ops_vector->cbo_umem_callback_version != 8296 UMEM_CALLBACK_VERSION) 8297 return (EINVAL); 8298 else 8299 driver_callback = ops_vector->cbo_umem_lock_cleanup; 8300 } 8301 if ((driver_callback == NULL) && (flags & DDI_UMEMLOCK_LONGTERM)) 8302 return (EINVAL); 8303 8304 /* 8305 * Call i_ddi_umem_unlock_thread_start if necessary. It will 8306 * be called on first ddi_umem_lock or umem_lockmemory call. 8307 */ 8308 if (ddi_umem_unlock_thread == NULL) 8309 i_ddi_umem_unlock_thread_start(); 8310 8311 /* Allocate memory for the cookie */ 8312 p = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP); 8313 8314 /* Convert the flags to seg_rw type */ 8315 if (flags & DDI_UMEMLOCK_WRITE) { 8316 p->s_flags = S_WRITE; 8317 } else { 8318 p->s_flags = S_READ; 8319 } 8320 8321 /* Store procp in cookie for later iosetup/unlock */ 8322 p->procp = (void *)procp; 8323 8324 /* 8325 * Store the struct as pointer in cookie for later use by 8326 * ddi_umem_unlock. The proc->p_as will be stale if ddi_umem_unlock 8327 * is called after relvm is called. 8328 */ 8329 p->asp = as; 8330 8331 /* 8332 * The size field is needed for lockmem accounting. 8333 */ 8334 p->size = len; 8335 init_lockedmem_rctl_flag(p); 8336 8337 if (umem_incr_devlockmem(p) != 0) { 8338 /* 8339 * The requested memory cannot be locked 8340 */ 8341 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8342 *cookie = (ddi_umem_cookie_t)NULL; 8343 return (ENOMEM); 8344 } 8345 8346 /* Lock the pages corresponding to addr, len in memory */ 8347 error = as_pagelock(as, &(p->pparray), addr, len, p->s_flags); 8348 if (error != 0) { 8349 umem_decr_devlockmem(p); 8350 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8351 *cookie = (ddi_umem_cookie_t)NULL; 8352 return (error); 8353 } 8354 8355 /* 8356 * For longterm locking the addr must pertain to a seg_vn segment or 8357 * or a seg_spt segment. 8358 * If the segment pertains to a regular file, it cannot be 8359 * mapped MAP_SHARED. 8360 * This is to prevent a deadlock if a file truncation is attempted 8361 * after the locking is done. 8362 * Doing this after as_pagelock guarantees persistence of the as; if 8363 * an unacceptable segment is found, the cleanup includes calling 8364 * as_pageunlock before returning EFAULT. 8365 * 8366 * segdev is allowed here as it is already locked. This allows 8367 * for memory exported by drivers through mmap() (which is already 8368 * locked) to be allowed for LONGTERM. 8369 */ 8370 if (flags & DDI_UMEMLOCK_LONGTERM) { 8371 extern struct seg_ops segspt_shmops; 8372 extern struct seg_ops segdev_ops; 8373 AS_LOCK_ENTER(as, RW_READER); 8374 for (seg = as_segat(as, addr); ; seg = AS_SEGNEXT(as, seg)) { 8375 if (seg == NULL || seg->s_base > addr + len) 8376 break; 8377 if (seg->s_ops == &segdev_ops) 8378 continue; 8379 if (((seg->s_ops != &segvn_ops) && 8380 (seg->s_ops != &segspt_shmops)) || 8381 ((SEGOP_GETVP(seg, addr, &vp) == 0 && 8382 vp != NULL && vp->v_type == VREG) && 8383 (SEGOP_GETTYPE(seg, addr) & MAP_SHARED))) { 8384 as_pageunlock(as, p->pparray, 8385 addr, len, p->s_flags); 8386 AS_LOCK_EXIT(as); 8387 umem_decr_devlockmem(p); 8388 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8389 *cookie = (ddi_umem_cookie_t)NULL; 8390 return (EFAULT); 8391 } 8392 } 8393 AS_LOCK_EXIT(as); 8394 } 8395 8396 8397 /* Initialize the fields in the ddi_umem_cookie */ 8398 p->cvaddr = addr; 8399 p->type = UMEM_LOCKED; 8400 if (driver_callback != NULL) { 8401 /* i_ddi_umem_unlock and umem_lock_undo may need the cookie */ 8402 p->cook_refcnt = 2; 8403 p->callbacks = *ops_vector; 8404 } else { 8405 /* only i_ddi_umme_unlock needs the cookie */ 8406 p->cook_refcnt = 1; 8407 } 8408 8409 *cookie = (ddi_umem_cookie_t)p; 8410 8411 /* 8412 * If a driver callback was specified, add an entry to the 8413 * as struct callback list. The as_pagelock above guarantees 8414 * the persistence of as. 8415 */ 8416 if (driver_callback) { 8417 error = as_add_callback(as, umem_lock_undo, p, AS_ALL_EVENT, 8418 addr, len, KM_SLEEP); 8419 if (error != 0) { 8420 as_pageunlock(as, p->pparray, 8421 addr, len, p->s_flags); 8422 umem_decr_devlockmem(p); 8423 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8424 *cookie = (ddi_umem_cookie_t)NULL; 8425 } 8426 } 8427 return (error); 8428 } 8429 8430 /* 8431 * Unlock the pages locked by ddi_umem_lock or umem_lockmemory and free 8432 * the cookie. Called from i_ddi_umem_unlock_thread. 8433 */ 8434 8435 static void 8436 i_ddi_umem_unlock(struct ddi_umem_cookie *p) 8437 { 8438 uint_t rc; 8439 8440 /* 8441 * There is no way to determine whether a callback to 8442 * umem_lock_undo was registered via as_add_callback. 8443 * (i.e. umem_lockmemory was called with DDI_MEMLOCK_LONGTERM and 8444 * a valid callback function structure.) as_delete_callback 8445 * is called to delete a possible registered callback. If the 8446 * return from as_delete_callbacks is AS_CALLBACK_DELETED, it 8447 * indicates that there was a callback registered, and that is was 8448 * successfully deleted. Thus, the cookie reference count 8449 * will never be decremented by umem_lock_undo. Just return the 8450 * memory for the cookie, since both users of the cookie are done. 8451 * A return of AS_CALLBACK_NOTFOUND indicates a callback was 8452 * never registered. A return of AS_CALLBACK_DELETE_DEFERRED 8453 * indicates that callback processing is taking place and, and 8454 * umem_lock_undo is, or will be, executing, and thus decrementing 8455 * the cookie reference count when it is complete. 8456 * 8457 * This needs to be done before as_pageunlock so that the 8458 * persistence of as is guaranteed because of the locked pages. 8459 * 8460 */ 8461 rc = as_delete_callback(p->asp, p); 8462 8463 8464 /* 8465 * The proc->p_as will be stale if i_ddi_umem_unlock is called 8466 * after relvm is called so use p->asp. 8467 */ 8468 as_pageunlock(p->asp, p->pparray, p->cvaddr, p->size, p->s_flags); 8469 8470 /* 8471 * Now that we have unlocked the memory decrement the 8472 * *.max-locked-memory rctl 8473 */ 8474 umem_decr_devlockmem(p); 8475 8476 if (rc == AS_CALLBACK_DELETED) { 8477 /* umem_lock_undo will not happen, return the cookie memory */ 8478 ASSERT(p->cook_refcnt == 2); 8479 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8480 } else { 8481 /* 8482 * umem_undo_lock may happen if as_delete_callback returned 8483 * AS_CALLBACK_DELETE_DEFERRED. In that case, decrement the 8484 * reference count, atomically, and return the cookie 8485 * memory if the reference count goes to zero. The only 8486 * other value for rc is AS_CALLBACK_NOTFOUND. In that 8487 * case, just return the cookie memory. 8488 */ 8489 if ((rc != AS_CALLBACK_DELETE_DEFERRED) || 8490 (atomic_dec_ulong_nv((ulong_t *)(&(p->cook_refcnt))) 8491 == 0)) { 8492 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8493 } 8494 } 8495 } 8496 8497 /* 8498 * i_ddi_umem_unlock_thread - deferred ddi_umem_unlock list handler. 8499 * 8500 * Call i_ddi_umem_unlock for entries in the ddi_umem_unlock list 8501 * until it is empty. Then, wait for more to be added. This thread is awoken 8502 * via calls to ddi_umem_unlock. 8503 */ 8504 8505 static void 8506 i_ddi_umem_unlock_thread(void) 8507 { 8508 struct ddi_umem_cookie *ret_cookie; 8509 callb_cpr_t cprinfo; 8510 8511 /* process the ddi_umem_unlock list */ 8512 CALLB_CPR_INIT(&cprinfo, &ddi_umem_unlock_mutex, 8513 callb_generic_cpr, "unlock_thread"); 8514 for (;;) { 8515 mutex_enter(&ddi_umem_unlock_mutex); 8516 if (ddi_umem_unlock_head != NULL) { /* list not empty */ 8517 ret_cookie = ddi_umem_unlock_head; 8518 /* take if off the list */ 8519 if ((ddi_umem_unlock_head = 8520 ddi_umem_unlock_head->unl_forw) == NULL) { 8521 ddi_umem_unlock_tail = NULL; 8522 } 8523 mutex_exit(&ddi_umem_unlock_mutex); 8524 /* unlock the pages in this cookie */ 8525 (void) i_ddi_umem_unlock(ret_cookie); 8526 } else { /* list is empty, wait for next ddi_umem_unlock */ 8527 CALLB_CPR_SAFE_BEGIN(&cprinfo); 8528 cv_wait(&ddi_umem_unlock_cv, &ddi_umem_unlock_mutex); 8529 CALLB_CPR_SAFE_END(&cprinfo, &ddi_umem_unlock_mutex); 8530 mutex_exit(&ddi_umem_unlock_mutex); 8531 } 8532 } 8533 /* ddi_umem_unlock_thread does not exit */ 8534 /* NOTREACHED */ 8535 } 8536 8537 /* 8538 * Start the thread that will process the ddi_umem_unlock list if it is 8539 * not already started (i_ddi_umem_unlock_thread). 8540 */ 8541 static void 8542 i_ddi_umem_unlock_thread_start(void) 8543 { 8544 mutex_enter(&ddi_umem_unlock_mutex); 8545 if (ddi_umem_unlock_thread == NULL) { 8546 ddi_umem_unlock_thread = thread_create(NULL, 0, 8547 i_ddi_umem_unlock_thread, NULL, 0, &p0, 8548 TS_RUN, minclsyspri); 8549 } 8550 mutex_exit(&ddi_umem_unlock_mutex); 8551 } 8552 8553 /* 8554 * Lock the virtual address range in the current process and create a 8555 * ddi_umem_cookie (of type UMEM_LOCKED). This can be used to pass to 8556 * ddi_umem_iosetup to create a buf or do devmap_umem_setup/remap to export 8557 * to user space. 8558 * 8559 * Note: The resource control accounting currently uses a full charge model 8560 * in other words attempts to lock the same/overlapping areas of memory 8561 * will deduct the full size of the buffer from the projects running 8562 * counter for the device locked memory. This applies to umem_lockmemory too. 8563 * 8564 * addr, size should be PAGESIZE aligned 8565 * flags - DDI_UMEMLOCK_READ, DDI_UMEMLOCK_WRITE or both 8566 * identifies whether the locked memory will be read or written or both 8567 * 8568 * Returns 0 on success 8569 * EINVAL - for invalid parameters 8570 * EPERM, ENOMEM and other error codes returned by as_pagelock 8571 * ENOMEM - is returned if the current request to lock memory exceeds 8572 * *.max-locked-memory resource control value. 8573 * EAGAIN - could not start the ddi_umem_unlock list processing thread 8574 */ 8575 int 8576 ddi_umem_lock(caddr_t addr, size_t len, int flags, ddi_umem_cookie_t *cookie) 8577 { 8578 int error; 8579 struct ddi_umem_cookie *p; 8580 8581 *cookie = NULL; /* in case of any error return */ 8582 8583 /* These are the only two valid flags */ 8584 if ((flags & ~(DDI_UMEMLOCK_READ | DDI_UMEMLOCK_WRITE)) != 0) { 8585 return (EINVAL); 8586 } 8587 8588 /* At least one of the two flags (or both) must be set */ 8589 if ((flags & (DDI_UMEMLOCK_READ | DDI_UMEMLOCK_WRITE)) == 0) { 8590 return (EINVAL); 8591 } 8592 8593 /* addr and len must be page-aligned */ 8594 if (((uintptr_t)addr & PAGEOFFSET) != 0) { 8595 return (EINVAL); 8596 } 8597 8598 if ((len & PAGEOFFSET) != 0) { 8599 return (EINVAL); 8600 } 8601 8602 /* 8603 * Call i_ddi_umem_unlock_thread_start if necessary. It will 8604 * be called on first ddi_umem_lock or umem_lockmemory call. 8605 */ 8606 if (ddi_umem_unlock_thread == NULL) 8607 i_ddi_umem_unlock_thread_start(); 8608 8609 /* Allocate memory for the cookie */ 8610 p = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP); 8611 8612 /* Convert the flags to seg_rw type */ 8613 if (flags & DDI_UMEMLOCK_WRITE) { 8614 p->s_flags = S_WRITE; 8615 } else { 8616 p->s_flags = S_READ; 8617 } 8618 8619 /* Store curproc in cookie for later iosetup/unlock */ 8620 p->procp = (void *)curproc; 8621 8622 /* 8623 * Store the struct as pointer in cookie for later use by 8624 * ddi_umem_unlock. The proc->p_as will be stale if ddi_umem_unlock 8625 * is called after relvm is called. 8626 */ 8627 p->asp = curproc->p_as; 8628 /* 8629 * The size field is needed for lockmem accounting. 8630 */ 8631 p->size = len; 8632 init_lockedmem_rctl_flag(p); 8633 8634 if (umem_incr_devlockmem(p) != 0) { 8635 /* 8636 * The requested memory cannot be locked 8637 */ 8638 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8639 *cookie = (ddi_umem_cookie_t)NULL; 8640 return (ENOMEM); 8641 } 8642 8643 /* Lock the pages corresponding to addr, len in memory */ 8644 error = as_pagelock(((proc_t *)p->procp)->p_as, &(p->pparray), 8645 addr, len, p->s_flags); 8646 if (error != 0) { 8647 umem_decr_devlockmem(p); 8648 kmem_free(p, sizeof (struct ddi_umem_cookie)); 8649 *cookie = (ddi_umem_cookie_t)NULL; 8650 return (error); 8651 } 8652 8653 /* Initialize the fields in the ddi_umem_cookie */ 8654 p->cvaddr = addr; 8655 p->type = UMEM_LOCKED; 8656 p->cook_refcnt = 1; 8657 8658 *cookie = (ddi_umem_cookie_t)p; 8659 return (error); 8660 } 8661 8662 /* 8663 * Add the cookie to the ddi_umem_unlock list. Pages will be 8664 * unlocked by i_ddi_umem_unlock_thread. 8665 */ 8666 8667 void 8668 ddi_umem_unlock(ddi_umem_cookie_t cookie) 8669 { 8670 struct ddi_umem_cookie *p = (struct ddi_umem_cookie *)cookie; 8671 8672 ASSERT(p->type == UMEM_LOCKED); 8673 ASSERT(CPU_ON_INTR(CPU) == 0); /* cannot be high level */ 8674 ASSERT(ddi_umem_unlock_thread != NULL); 8675 8676 p->unl_forw = (struct ddi_umem_cookie *)NULL; /* end of list */ 8677 /* 8678 * Queue the unlock request and notify i_ddi_umem_unlock thread 8679 * if it's called in the interrupt context. Otherwise, unlock pages 8680 * immediately. 8681 */ 8682 if (servicing_interrupt()) { 8683 /* queue the unlock request and notify the thread */ 8684 mutex_enter(&ddi_umem_unlock_mutex); 8685 if (ddi_umem_unlock_head == NULL) { 8686 ddi_umem_unlock_head = ddi_umem_unlock_tail = p; 8687 cv_broadcast(&ddi_umem_unlock_cv); 8688 } else { 8689 ddi_umem_unlock_tail->unl_forw = p; 8690 ddi_umem_unlock_tail = p; 8691 } 8692 mutex_exit(&ddi_umem_unlock_mutex); 8693 } else { 8694 /* unlock the pages right away */ 8695 (void) i_ddi_umem_unlock(p); 8696 } 8697 } 8698 8699 /* 8700 * Create a buf structure from a ddi_umem_cookie 8701 * cookie - is a ddi_umem_cookie for from ddi_umem_lock and ddi_umem_alloc 8702 * (only UMEM_LOCKED & KMEM_NON_PAGEABLE types supported) 8703 * off, len - identifies the portion of the memory represented by the cookie 8704 * that the buf points to. 8705 * NOTE: off, len need to follow the alignment/size restrictions of the 8706 * device (dev) that this buf will be passed to. Some devices 8707 * will accept unrestricted alignment/size, whereas others (such as 8708 * st) require some block-size alignment/size. It is the caller's 8709 * responsibility to ensure that the alignment/size restrictions 8710 * are met (we cannot assert as we do not know the restrictions) 8711 * 8712 * direction - is one of B_READ or B_WRITE and needs to be compatible with 8713 * the flags used in ddi_umem_lock 8714 * 8715 * The following three arguments are used to initialize fields in the 8716 * buf structure and are uninterpreted by this routine. 8717 * 8718 * dev 8719 * blkno 8720 * iodone 8721 * 8722 * sleepflag - is one of DDI_UMEM_SLEEP or DDI_UMEM_NOSLEEP 8723 * 8724 * Returns a buf structure pointer on success (to be freed by freerbuf) 8725 * NULL on any parameter error or memory alloc failure 8726 * 8727 */ 8728 struct buf * 8729 ddi_umem_iosetup(ddi_umem_cookie_t cookie, off_t off, size_t len, 8730 int direction, dev_t dev, daddr_t blkno, 8731 int (*iodone)(struct buf *), int sleepflag) 8732 { 8733 struct ddi_umem_cookie *p = (struct ddi_umem_cookie *)cookie; 8734 struct buf *bp; 8735 8736 /* 8737 * check for valid cookie offset, len 8738 */ 8739 if ((off + len) > p->size) { 8740 return (NULL); 8741 } 8742 8743 if (len > p->size) { 8744 return (NULL); 8745 } 8746 8747 /* direction has to be one of B_READ or B_WRITE */ 8748 if ((direction != B_READ) && (direction != B_WRITE)) { 8749 return (NULL); 8750 } 8751 8752 /* These are the only two valid sleepflags */ 8753 if ((sleepflag != DDI_UMEM_SLEEP) && (sleepflag != DDI_UMEM_NOSLEEP)) { 8754 return (NULL); 8755 } 8756 8757 /* 8758 * Only cookies of type UMEM_LOCKED and KMEM_NON_PAGEABLE are supported 8759 */ 8760 if ((p->type != UMEM_LOCKED) && (p->type != KMEM_NON_PAGEABLE)) { 8761 return (NULL); 8762 } 8763 8764 /* If type is KMEM_NON_PAGEABLE procp is NULL */ 8765 ASSERT((p->type == KMEM_NON_PAGEABLE) ? 8766 (p->procp == NULL) : (p->procp != NULL)); 8767 8768 bp = kmem_alloc(sizeof (struct buf), sleepflag); 8769 if (bp == NULL) { 8770 return (NULL); 8771 } 8772 bioinit(bp); 8773 8774 bp->b_flags = B_BUSY | B_PHYS | direction; 8775 bp->b_edev = dev; 8776 bp->b_lblkno = blkno; 8777 bp->b_iodone = iodone; 8778 bp->b_bcount = len; 8779 bp->b_proc = (proc_t *)p->procp; 8780 ASSERT(((uintptr_t)(p->cvaddr) & PAGEOFFSET) == 0); 8781 bp->b_un.b_addr = (caddr_t)((uintptr_t)(p->cvaddr) + off); 8782 if (p->pparray != NULL) { 8783 bp->b_flags |= B_SHADOW; 8784 ASSERT(((uintptr_t)(p->cvaddr) & PAGEOFFSET) == 0); 8785 bp->b_shadow = p->pparray + btop(off); 8786 } 8787 return (bp); 8788 } 8789 8790 /* 8791 * Fault-handling and related routines 8792 */ 8793 8794 ddi_devstate_t 8795 ddi_get_devstate(dev_info_t *dip) 8796 { 8797 if (DEVI_IS_DEVICE_OFFLINE(dip)) 8798 return (DDI_DEVSTATE_OFFLINE); 8799 else if (DEVI_IS_DEVICE_DOWN(dip) || DEVI_IS_BUS_DOWN(dip)) 8800 return (DDI_DEVSTATE_DOWN); 8801 else if (DEVI_IS_BUS_QUIESCED(dip)) 8802 return (DDI_DEVSTATE_QUIESCED); 8803 else if (DEVI_IS_DEVICE_DEGRADED(dip)) 8804 return (DDI_DEVSTATE_DEGRADED); 8805 else 8806 return (DDI_DEVSTATE_UP); 8807 } 8808 8809 void 8810 ddi_dev_report_fault(dev_info_t *dip, ddi_fault_impact_t impact, 8811 ddi_fault_location_t location, const char *message) 8812 { 8813 struct ddi_fault_event_data fd; 8814 ddi_eventcookie_t ec; 8815 8816 /* 8817 * Assemble all the information into a fault-event-data structure 8818 */ 8819 fd.f_dip = dip; 8820 fd.f_impact = impact; 8821 fd.f_location = location; 8822 fd.f_message = message; 8823 fd.f_oldstate = ddi_get_devstate(dip); 8824 8825 /* 8826 * Get eventcookie from defining parent. 8827 */ 8828 if (ddi_get_eventcookie(dip, DDI_DEVI_FAULT_EVENT, &ec) != 8829 DDI_SUCCESS) 8830 return; 8831 8832 (void) ndi_post_event(dip, dip, ec, &fd); 8833 } 8834 8835 char * 8836 i_ddi_devi_class(dev_info_t *dip) 8837 { 8838 return (DEVI(dip)->devi_device_class); 8839 } 8840 8841 int 8842 i_ddi_set_devi_class(dev_info_t *dip, char *devi_class, int flag) 8843 { 8844 struct dev_info *devi = DEVI(dip); 8845 8846 mutex_enter(&devi->devi_lock); 8847 8848 if (devi->devi_device_class) 8849 kmem_free(devi->devi_device_class, 8850 strlen(devi->devi_device_class) + 1); 8851 8852 if ((devi->devi_device_class = i_ddi_strdup(devi_class, flag)) 8853 != NULL) { 8854 mutex_exit(&devi->devi_lock); 8855 return (DDI_SUCCESS); 8856 } 8857 8858 mutex_exit(&devi->devi_lock); 8859 8860 return (DDI_FAILURE); 8861 } 8862 8863 8864 /* 8865 * Task Queues DDI interfaces. 8866 */ 8867 8868 /* ARGSUSED */ 8869 ddi_taskq_t * 8870 ddi_taskq_create(dev_info_t *dip, const char *name, int nthreads, 8871 pri_t pri, uint_t cflags) 8872 { 8873 char full_name[TASKQ_NAMELEN]; 8874 const char *tq_name; 8875 int nodeid = 0; 8876 8877 if (dip == NULL) 8878 tq_name = name; 8879 else { 8880 nodeid = ddi_get_instance(dip); 8881 8882 if (name == NULL) 8883 name = "tq"; 8884 8885 (void) snprintf(full_name, sizeof (full_name), "%s_%s", 8886 ddi_driver_name(dip), name); 8887 8888 tq_name = full_name; 8889 } 8890 8891 return ((ddi_taskq_t *)taskq_create_instance(tq_name, nodeid, nthreads, 8892 pri == TASKQ_DEFAULTPRI ? minclsyspri : pri, 8893 nthreads, INT_MAX, TASKQ_PREPOPULATE)); 8894 } 8895 8896 void 8897 ddi_taskq_destroy(ddi_taskq_t *tq) 8898 { 8899 taskq_destroy((taskq_t *)tq); 8900 } 8901 8902 int 8903 ddi_taskq_dispatch(ddi_taskq_t *tq, void (* func)(void *), 8904 void *arg, uint_t dflags) 8905 { 8906 taskqid_t id = taskq_dispatch((taskq_t *)tq, func, arg, 8907 dflags == DDI_SLEEP ? TQ_SLEEP : TQ_NOSLEEP); 8908 8909 return (id != TASKQID_INVALID ? DDI_SUCCESS : DDI_FAILURE); 8910 } 8911 8912 void 8913 ddi_taskq_wait(ddi_taskq_t *tq) 8914 { 8915 taskq_wait((taskq_t *)tq); 8916 } 8917 8918 void 8919 ddi_taskq_suspend(ddi_taskq_t *tq) 8920 { 8921 taskq_suspend((taskq_t *)tq); 8922 } 8923 8924 boolean_t 8925 ddi_taskq_suspended(ddi_taskq_t *tq) 8926 { 8927 return (taskq_suspended((taskq_t *)tq)); 8928 } 8929 8930 void 8931 ddi_taskq_resume(ddi_taskq_t *tq) 8932 { 8933 taskq_resume((taskq_t *)tq); 8934 } 8935 8936 int 8937 ddi_parse( 8938 const char *ifname, 8939 char *alnum, 8940 uint_t *nump) 8941 { 8942 const char *p; 8943 int l; 8944 ulong_t num; 8945 boolean_t nonum = B_TRUE; 8946 char c; 8947 8948 l = strlen(ifname); 8949 for (p = ifname + l; p != ifname; l--) { 8950 c = *--p; 8951 if (!isdigit(c)) { 8952 (void) strlcpy(alnum, ifname, l + 1); 8953 if (ddi_strtoul(p + 1, NULL, 10, &num) != 0) 8954 return (DDI_FAILURE); 8955 break; 8956 } 8957 nonum = B_FALSE; 8958 } 8959 if (l == 0 || nonum) 8960 return (DDI_FAILURE); 8961 8962 *nump = num; 8963 return (DDI_SUCCESS); 8964 } 8965 8966 /* 8967 * Default initialization function for drivers that don't need to quiesce. 8968 */ 8969 /* ARGSUSED */ 8970 int 8971 ddi_quiesce_not_needed(dev_info_t *dip) 8972 { 8973 return (DDI_SUCCESS); 8974 } 8975 8976 /* 8977 * Initialization function for drivers that should implement quiesce() 8978 * but haven't yet. 8979 */ 8980 /* ARGSUSED */ 8981 int 8982 ddi_quiesce_not_supported(dev_info_t *dip) 8983 { 8984 return (DDI_FAILURE); 8985 } 8986 8987 char * 8988 ddi_strdup(const char *str, int flag) 8989 { 8990 int n; 8991 char *ptr; 8992 8993 ASSERT(str != NULL); 8994 ASSERT((flag == KM_SLEEP) || (flag == KM_NOSLEEP)); 8995 8996 n = strlen(str); 8997 if ((ptr = kmem_alloc(n + 1, flag)) == NULL) 8998 return (NULL); 8999 bcopy(str, ptr, n + 1); 9000 return (ptr); 9001 } 9002 9003 char * 9004 strdup(const char *str) 9005 { 9006 return (ddi_strdup(str, KM_SLEEP)); 9007 } 9008 9009 void 9010 strfree(char *str) 9011 { 9012 ASSERT(str != NULL); 9013 kmem_free(str, strlen(str) + 1); 9014 } 9015 9016 /* 9017 * Generic DDI callback interfaces. 9018 */ 9019 9020 int 9021 ddi_cb_register(dev_info_t *dip, ddi_cb_flags_t flags, ddi_cb_func_t cbfunc, 9022 void *arg1, void *arg2, ddi_cb_handle_t *ret_hdlp) 9023 { 9024 ddi_cb_t *cbp; 9025 9026 ASSERT(dip != NULL); 9027 ASSERT(DDI_CB_FLAG_VALID(flags)); 9028 ASSERT(cbfunc != NULL); 9029 ASSERT(ret_hdlp != NULL); 9030 9031 /* Sanity check the context */ 9032 ASSERT(!servicing_interrupt()); 9033 if (servicing_interrupt()) 9034 return (DDI_FAILURE); 9035 9036 /* Validate parameters */ 9037 if ((dip == NULL) || !DDI_CB_FLAG_VALID(flags) || 9038 (cbfunc == NULL) || (ret_hdlp == NULL)) 9039 return (DDI_EINVAL); 9040 9041 /* Check for previous registration */ 9042 if (DEVI(dip)->devi_cb_p != NULL) 9043 return (DDI_EALREADY); 9044 9045 /* Allocate and initialize callback */ 9046 cbp = kmem_zalloc(sizeof (ddi_cb_t), KM_SLEEP); 9047 cbp->cb_dip = dip; 9048 cbp->cb_func = cbfunc; 9049 cbp->cb_arg1 = arg1; 9050 cbp->cb_arg2 = arg2; 9051 cbp->cb_flags = flags; 9052 DEVI(dip)->devi_cb_p = cbp; 9053 9054 /* If adding an IRM callback, notify IRM */ 9055 if (flags & DDI_CB_FLAG_INTR) 9056 i_ddi_irm_set_cb(dip, B_TRUE); 9057 9058 *ret_hdlp = (ddi_cb_handle_t)&(DEVI(dip)->devi_cb_p); 9059 return (DDI_SUCCESS); 9060 } 9061 9062 int 9063 ddi_cb_unregister(ddi_cb_handle_t hdl) 9064 { 9065 ddi_cb_t *cbp; 9066 dev_info_t *dip; 9067 9068 ASSERT(hdl != NULL); 9069 9070 /* Sanity check the context */ 9071 ASSERT(!servicing_interrupt()); 9072 if (servicing_interrupt()) 9073 return (DDI_FAILURE); 9074 9075 /* Validate parameters */ 9076 if ((hdl == NULL) || ((cbp = *(ddi_cb_t **)hdl) == NULL) || 9077 ((dip = cbp->cb_dip) == NULL)) 9078 return (DDI_EINVAL); 9079 9080 /* If removing an IRM callback, notify IRM */ 9081 if (cbp->cb_flags & DDI_CB_FLAG_INTR) 9082 i_ddi_irm_set_cb(dip, B_FALSE); 9083 9084 /* Destroy the callback */ 9085 kmem_free(cbp, sizeof (ddi_cb_t)); 9086 DEVI(dip)->devi_cb_p = NULL; 9087 9088 return (DDI_SUCCESS); 9089 } 9090 9091 /* 9092 * Platform independent DR routines 9093 */ 9094 9095 static int 9096 ndi2errno(int n) 9097 { 9098 int err = 0; 9099 9100 switch (n) { 9101 case NDI_NOMEM: 9102 err = ENOMEM; 9103 break; 9104 case NDI_BUSY: 9105 err = EBUSY; 9106 break; 9107 case NDI_FAULT: 9108 err = EFAULT; 9109 break; 9110 case NDI_FAILURE: 9111 err = EIO; 9112 break; 9113 case NDI_SUCCESS: 9114 break; 9115 case NDI_BADHANDLE: 9116 default: 9117 err = EINVAL; 9118 break; 9119 } 9120 return (err); 9121 } 9122 9123 /* 9124 * Prom tree node list 9125 */ 9126 struct ptnode { 9127 pnode_t nodeid; 9128 struct ptnode *next; 9129 }; 9130 9131 /* 9132 * Prom tree walk arg 9133 */ 9134 struct pta { 9135 dev_info_t *pdip; 9136 devi_branch_t *bp; 9137 uint_t flags; 9138 dev_info_t *fdip; 9139 struct ptnode *head; 9140 }; 9141 9142 static void 9143 visit_node(pnode_t nodeid, struct pta *ap) 9144 { 9145 struct ptnode **nextp; 9146 int (*select)(pnode_t, void *, uint_t); 9147 9148 ASSERT(nodeid != OBP_NONODE && nodeid != OBP_BADNODE); 9149 9150 select = ap->bp->create.prom_branch_select; 9151 9152 ASSERT(select); 9153 9154 if (select(nodeid, ap->bp->arg, 0) == DDI_SUCCESS) { 9155 9156 for (nextp = &ap->head; *nextp; nextp = &(*nextp)->next) 9157 ; 9158 9159 *nextp = kmem_zalloc(sizeof (struct ptnode), KM_SLEEP); 9160 9161 (*nextp)->nodeid = nodeid; 9162 } 9163 9164 if ((ap->flags & DEVI_BRANCH_CHILD) == DEVI_BRANCH_CHILD) 9165 return; 9166 9167 nodeid = prom_childnode(nodeid); 9168 while (nodeid != OBP_NONODE && nodeid != OBP_BADNODE) { 9169 visit_node(nodeid, ap); 9170 nodeid = prom_nextnode(nodeid); 9171 } 9172 } 9173 9174 /* 9175 * NOTE: The caller of this function must check for device contracts 9176 * or LDI callbacks against this dip before setting the dip offline. 9177 */ 9178 static int 9179 set_infant_dip_offline(dev_info_t *dip, void *arg) 9180 { 9181 char *path = (char *)arg; 9182 9183 ASSERT(dip); 9184 ASSERT(arg); 9185 9186 if (i_ddi_node_state(dip) >= DS_ATTACHED) { 9187 (void) ddi_pathname(dip, path); 9188 cmn_err(CE_WARN, "Attempt to set offline flag on attached " 9189 "node: %s", path); 9190 return (DDI_FAILURE); 9191 } 9192 9193 mutex_enter(&(DEVI(dip)->devi_lock)); 9194 if (!DEVI_IS_DEVICE_OFFLINE(dip)) 9195 DEVI_SET_DEVICE_OFFLINE(dip); 9196 mutex_exit(&(DEVI(dip)->devi_lock)); 9197 9198 return (DDI_SUCCESS); 9199 } 9200 9201 typedef struct result { 9202 char *path; 9203 int result; 9204 } result_t; 9205 9206 static int 9207 dip_set_offline(dev_info_t *dip, void *arg) 9208 { 9209 int end; 9210 result_t *resp = (result_t *)arg; 9211 9212 ASSERT(dip); 9213 ASSERT(resp); 9214 9215 /* 9216 * We stop the walk if e_ddi_offline_notify() returns 9217 * failure, because this implies that one or more consumers 9218 * (either LDI or contract based) has blocked the offline. 9219 * So there is no point in conitnuing the walk 9220 */ 9221 if (e_ddi_offline_notify(dip) == DDI_FAILURE) { 9222 resp->result = DDI_FAILURE; 9223 return (DDI_WALK_TERMINATE); 9224 } 9225 9226 /* 9227 * If set_infant_dip_offline() returns failure, it implies 9228 * that we failed to set a particular dip offline. This 9229 * does not imply that the offline as a whole should fail. 9230 * We want to do the best we can, so we continue the walk. 9231 */ 9232 if (set_infant_dip_offline(dip, resp->path) == DDI_SUCCESS) 9233 end = DDI_SUCCESS; 9234 else 9235 end = DDI_FAILURE; 9236 9237 e_ddi_offline_finalize(dip, end); 9238 9239 return (DDI_WALK_CONTINUE); 9240 } 9241 9242 /* 9243 * The call to e_ddi_offline_notify() exists for the 9244 * unlikely error case that a branch we are trying to 9245 * create already exists and has device contracts or LDI 9246 * event callbacks against it. 9247 * 9248 * We allow create to succeed for such branches only if 9249 * no constraints block the offline. 9250 */ 9251 static int 9252 branch_set_offline(dev_info_t *dip, char *path) 9253 { 9254 int circ; 9255 int end; 9256 result_t res; 9257 9258 9259 if (e_ddi_offline_notify(dip) == DDI_FAILURE) { 9260 return (DDI_FAILURE); 9261 } 9262 9263 if (set_infant_dip_offline(dip, path) == DDI_SUCCESS) 9264 end = DDI_SUCCESS; 9265 else 9266 end = DDI_FAILURE; 9267 9268 e_ddi_offline_finalize(dip, end); 9269 9270 if (end == DDI_FAILURE) 9271 return (DDI_FAILURE); 9272 9273 res.result = DDI_SUCCESS; 9274 res.path = path; 9275 9276 ndi_devi_enter(dip, &circ); 9277 ddi_walk_devs(ddi_get_child(dip), dip_set_offline, &res); 9278 ndi_devi_exit(dip, circ); 9279 9280 return (res.result); 9281 } 9282 9283 /*ARGSUSED*/ 9284 static int 9285 create_prom_branch(void *arg, int has_changed) 9286 { 9287 int circ; 9288 int exists, rv; 9289 pnode_t nodeid; 9290 struct ptnode *tnp; 9291 dev_info_t *dip; 9292 struct pta *ap = arg; 9293 devi_branch_t *bp; 9294 char *path; 9295 9296 ASSERT(ap); 9297 ASSERT(ap->fdip == NULL); 9298 ASSERT(ap->pdip && ndi_dev_is_prom_node(ap->pdip)); 9299 9300 bp = ap->bp; 9301 9302 nodeid = ddi_get_nodeid(ap->pdip); 9303 if (nodeid == OBP_NONODE || nodeid == OBP_BADNODE) { 9304 cmn_err(CE_WARN, "create_prom_branch: invalid " 9305 "nodeid: 0x%x", nodeid); 9306 return (EINVAL); 9307 } 9308 9309 ap->head = NULL; 9310 9311 nodeid = prom_childnode(nodeid); 9312 while (nodeid != OBP_NONODE && nodeid != OBP_BADNODE) { 9313 visit_node(nodeid, ap); 9314 nodeid = prom_nextnode(nodeid); 9315 } 9316 9317 if (ap->head == NULL) 9318 return (ENODEV); 9319 9320 path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 9321 rv = 0; 9322 while ((tnp = ap->head) != NULL) { 9323 ap->head = tnp->next; 9324 9325 ndi_devi_enter(ap->pdip, &circ); 9326 9327 /* 9328 * Check if the branch already exists. 9329 */ 9330 exists = 0; 9331 dip = e_ddi_nodeid_to_dip(tnp->nodeid); 9332 if (dip != NULL) { 9333 exists = 1; 9334 9335 /* Parent is held busy, so release hold */ 9336 ndi_rele_devi(dip); 9337 #ifdef DEBUG 9338 cmn_err(CE_WARN, "create_prom_branch: dip(%p) exists" 9339 " for nodeid 0x%x", (void *)dip, tnp->nodeid); 9340 #endif 9341 } else { 9342 dip = i_ddi_create_branch(ap->pdip, tnp->nodeid); 9343 } 9344 9345 kmem_free(tnp, sizeof (struct ptnode)); 9346 9347 /* 9348 * Hold the branch if it is not already held 9349 */ 9350 if (dip && !exists) { 9351 e_ddi_branch_hold(dip); 9352 } 9353 9354 ASSERT(dip == NULL || e_ddi_branch_held(dip)); 9355 9356 /* 9357 * Set all dips in the newly created branch offline so that 9358 * only a "configure" operation can attach 9359 * the branch 9360 */ 9361 if (dip == NULL || branch_set_offline(dip, path) 9362 == DDI_FAILURE) { 9363 ndi_devi_exit(ap->pdip, circ); 9364 rv = EIO; 9365 continue; 9366 } 9367 9368 ASSERT(ddi_get_parent(dip) == ap->pdip); 9369 9370 ndi_devi_exit(ap->pdip, circ); 9371 9372 if (ap->flags & DEVI_BRANCH_CONFIGURE) { 9373 int error = e_ddi_branch_configure(dip, &ap->fdip, 0); 9374 if (error && rv == 0) 9375 rv = error; 9376 } 9377 9378 /* 9379 * Invoke devi_branch_callback() (if it exists) only for 9380 * newly created branches 9381 */ 9382 if (bp->devi_branch_callback && !exists) 9383 bp->devi_branch_callback(dip, bp->arg, 0); 9384 } 9385 9386 kmem_free(path, MAXPATHLEN); 9387 9388 return (rv); 9389 } 9390 9391 static int 9392 sid_node_create(dev_info_t *pdip, devi_branch_t *bp, dev_info_t **rdipp) 9393 { 9394 int rv, circ, len; 9395 int i, flags, ret; 9396 dev_info_t *dip; 9397 char *nbuf; 9398 char *path; 9399 static const char *noname = "<none>"; 9400 9401 ASSERT(pdip); 9402 ASSERT(DEVI_BUSY_OWNED(pdip)); 9403 9404 flags = 0; 9405 9406 /* 9407 * Creating the root of a branch ? 9408 */ 9409 if (rdipp) { 9410 *rdipp = NULL; 9411 flags = DEVI_BRANCH_ROOT; 9412 } 9413 9414 ndi_devi_alloc_sleep(pdip, (char *)noname, DEVI_SID_NODEID, &dip); 9415 rv = bp->create.sid_branch_create(dip, bp->arg, flags); 9416 9417 nbuf = kmem_alloc(OBP_MAXDRVNAME, KM_SLEEP); 9418 9419 if (rv == DDI_WALK_ERROR) { 9420 cmn_err(CE_WARN, "e_ddi_branch_create: Error setting" 9421 " properties on devinfo node %p", (void *)dip); 9422 goto fail; 9423 } 9424 9425 len = OBP_MAXDRVNAME; 9426 if (ddi_getlongprop_buf(DDI_DEV_T_ANY, dip, 9427 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "name", nbuf, &len) 9428 != DDI_PROP_SUCCESS) { 9429 cmn_err(CE_WARN, "e_ddi_branch_create: devinfo node %p has" 9430 "no name property", (void *)dip); 9431 goto fail; 9432 } 9433 9434 ASSERT(i_ddi_node_state(dip) == DS_PROTO); 9435 if (ndi_devi_set_nodename(dip, nbuf, 0) != NDI_SUCCESS) { 9436 cmn_err(CE_WARN, "e_ddi_branch_create: cannot set name (%s)" 9437 " for devinfo node %p", nbuf, (void *)dip); 9438 goto fail; 9439 } 9440 9441 kmem_free(nbuf, OBP_MAXDRVNAME); 9442 9443 /* 9444 * Ignore bind failures just like boot does 9445 */ 9446 (void) ndi_devi_bind_driver(dip, 0); 9447 9448 switch (rv) { 9449 case DDI_WALK_CONTINUE: 9450 case DDI_WALK_PRUNESIB: 9451 ndi_devi_enter(dip, &circ); 9452 9453 i = DDI_WALK_CONTINUE; 9454 for (; i == DDI_WALK_CONTINUE; ) { 9455 i = sid_node_create(dip, bp, NULL); 9456 } 9457 9458 ASSERT(i == DDI_WALK_ERROR || i == DDI_WALK_PRUNESIB); 9459 if (i == DDI_WALK_ERROR) 9460 rv = i; 9461 /* 9462 * If PRUNESIB stop creating siblings 9463 * of dip's child. Subsequent walk behavior 9464 * is determined by rv returned by dip. 9465 */ 9466 9467 ndi_devi_exit(dip, circ); 9468 break; 9469 case DDI_WALK_TERMINATE: 9470 /* 9471 * Don't create children and ask our parent 9472 * to not create siblings either. 9473 */ 9474 rv = DDI_WALK_PRUNESIB; 9475 break; 9476 case DDI_WALK_PRUNECHILD: 9477 /* 9478 * Don't create children, but ask parent to continue 9479 * with siblings. 9480 */ 9481 rv = DDI_WALK_CONTINUE; 9482 break; 9483 default: 9484 ASSERT(0); 9485 break; 9486 } 9487 9488 if (rdipp) 9489 *rdipp = dip; 9490 9491 /* 9492 * Set device offline - only the "configure" op should cause an attach. 9493 * Note that it is safe to set the dip offline without checking 9494 * for either device contract or layered driver (LDI) based constraints 9495 * since there cannot be any contracts or LDI opens of this device. 9496 * This is because this node is a newly created dip with the parent busy 9497 * held, so no other thread can come in and attach this dip. A dip that 9498 * has never been attached cannot have contracts since by definition 9499 * a device contract (an agreement between a process and a device minor 9500 * node) can only be created against a device that has minor nodes 9501 * i.e is attached. Similarly an LDI open will only succeed if the 9502 * dip is attached. We assert below that the dip is not attached. 9503 */ 9504 ASSERT(i_ddi_node_state(dip) < DS_ATTACHED); 9505 path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 9506 ret = set_infant_dip_offline(dip, path); 9507 ASSERT(ret == DDI_SUCCESS); 9508 kmem_free(path, MAXPATHLEN); 9509 9510 return (rv); 9511 fail: 9512 (void) ndi_devi_free(dip); 9513 kmem_free(nbuf, OBP_MAXDRVNAME); 9514 return (DDI_WALK_ERROR); 9515 } 9516 9517 static int 9518 create_sid_branch( 9519 dev_info_t *pdip, 9520 devi_branch_t *bp, 9521 dev_info_t **dipp, 9522 uint_t flags) 9523 { 9524 int rv = 0, state = DDI_WALK_CONTINUE; 9525 dev_info_t *rdip; 9526 9527 while (state == DDI_WALK_CONTINUE) { 9528 int circ; 9529 9530 ndi_devi_enter(pdip, &circ); 9531 9532 state = sid_node_create(pdip, bp, &rdip); 9533 if (rdip == NULL) { 9534 ndi_devi_exit(pdip, circ); 9535 ASSERT(state == DDI_WALK_ERROR); 9536 break; 9537 } 9538 9539 e_ddi_branch_hold(rdip); 9540 9541 ndi_devi_exit(pdip, circ); 9542 9543 if (flags & DEVI_BRANCH_CONFIGURE) { 9544 int error = e_ddi_branch_configure(rdip, dipp, 0); 9545 if (error && rv == 0) 9546 rv = error; 9547 } 9548 9549 /* 9550 * devi_branch_callback() is optional 9551 */ 9552 if (bp->devi_branch_callback) 9553 bp->devi_branch_callback(rdip, bp->arg, 0); 9554 } 9555 9556 ASSERT(state == DDI_WALK_ERROR || state == DDI_WALK_PRUNESIB); 9557 9558 return (state == DDI_WALK_ERROR ? EIO : rv); 9559 } 9560 9561 int 9562 e_ddi_branch_create( 9563 dev_info_t *pdip, 9564 devi_branch_t *bp, 9565 dev_info_t **dipp, 9566 uint_t flags) 9567 { 9568 int prom_devi, sid_devi, error; 9569 9570 if (pdip == NULL || bp == NULL || bp->type == 0) 9571 return (EINVAL); 9572 9573 prom_devi = (bp->type == DEVI_BRANCH_PROM) ? 1 : 0; 9574 sid_devi = (bp->type == DEVI_BRANCH_SID) ? 1 : 0; 9575 9576 if (prom_devi && bp->create.prom_branch_select == NULL) 9577 return (EINVAL); 9578 else if (sid_devi && bp->create.sid_branch_create == NULL) 9579 return (EINVAL); 9580 else if (!prom_devi && !sid_devi) 9581 return (EINVAL); 9582 9583 if (flags & DEVI_BRANCH_EVENT) 9584 return (EINVAL); 9585 9586 if (prom_devi) { 9587 struct pta pta = {0}; 9588 9589 pta.pdip = pdip; 9590 pta.bp = bp; 9591 pta.flags = flags; 9592 9593 error = prom_tree_access(create_prom_branch, &pta, NULL); 9594 9595 if (dipp) 9596 *dipp = pta.fdip; 9597 else if (pta.fdip) 9598 ndi_rele_devi(pta.fdip); 9599 } else { 9600 error = create_sid_branch(pdip, bp, dipp, flags); 9601 } 9602 9603 return (error); 9604 } 9605 9606 int 9607 e_ddi_branch_configure(dev_info_t *rdip, dev_info_t **dipp, uint_t flags) 9608 { 9609 int rv; 9610 char *devnm; 9611 dev_info_t *pdip; 9612 9613 if (dipp) 9614 *dipp = NULL; 9615 9616 if (rdip == NULL || flags != 0 || (flags & DEVI_BRANCH_EVENT)) 9617 return (EINVAL); 9618 9619 pdip = ddi_get_parent(rdip); 9620 9621 ndi_hold_devi(pdip); 9622 9623 if (!e_ddi_branch_held(rdip)) { 9624 ndi_rele_devi(pdip); 9625 cmn_err(CE_WARN, "e_ddi_branch_configure: " 9626 "dip(%p) not held", (void *)rdip); 9627 return (EINVAL); 9628 } 9629 9630 if (i_ddi_node_state(rdip) < DS_INITIALIZED) { 9631 /* 9632 * First attempt to bind a driver. If we fail, return 9633 * success (On some platforms, dips for some device 9634 * types (CPUs) may not have a driver) 9635 */ 9636 if (ndi_devi_bind_driver(rdip, 0) != NDI_SUCCESS) { 9637 ndi_rele_devi(pdip); 9638 return (0); 9639 } 9640 9641 if (ddi_initchild(pdip, rdip) != DDI_SUCCESS) { 9642 rv = NDI_FAILURE; 9643 goto out; 9644 } 9645 } 9646 9647 ASSERT(i_ddi_node_state(rdip) >= DS_INITIALIZED); 9648 9649 devnm = kmem_alloc(MAXNAMELEN + 1, KM_SLEEP); 9650 9651 (void) ddi_deviname(rdip, devnm); 9652 9653 if ((rv = ndi_devi_config_one(pdip, devnm+1, &rdip, 9654 NDI_DEVI_ONLINE | NDI_CONFIG)) == NDI_SUCCESS) { 9655 /* release hold from ndi_devi_config_one() */ 9656 ndi_rele_devi(rdip); 9657 } 9658 9659 kmem_free(devnm, MAXNAMELEN + 1); 9660 out: 9661 if (rv != NDI_SUCCESS && dipp && rdip) { 9662 ndi_hold_devi(rdip); 9663 *dipp = rdip; 9664 } 9665 ndi_rele_devi(pdip); 9666 return (ndi2errno(rv)); 9667 } 9668 9669 void 9670 e_ddi_branch_hold(dev_info_t *rdip) 9671 { 9672 if (e_ddi_branch_held(rdip)) { 9673 cmn_err(CE_WARN, "e_ddi_branch_hold: branch already held"); 9674 return; 9675 } 9676 9677 mutex_enter(&DEVI(rdip)->devi_lock); 9678 if ((DEVI(rdip)->devi_flags & DEVI_BRANCH_HELD) == 0) { 9679 DEVI(rdip)->devi_flags |= DEVI_BRANCH_HELD; 9680 DEVI(rdip)->devi_ref++; 9681 } 9682 ASSERT(DEVI(rdip)->devi_ref > 0); 9683 mutex_exit(&DEVI(rdip)->devi_lock); 9684 } 9685 9686 int 9687 e_ddi_branch_held(dev_info_t *rdip) 9688 { 9689 int rv = 0; 9690 9691 mutex_enter(&DEVI(rdip)->devi_lock); 9692 if ((DEVI(rdip)->devi_flags & DEVI_BRANCH_HELD) && 9693 DEVI(rdip)->devi_ref > 0) { 9694 rv = 1; 9695 } 9696 mutex_exit(&DEVI(rdip)->devi_lock); 9697 9698 return (rv); 9699 } 9700 9701 void 9702 e_ddi_branch_rele(dev_info_t *rdip) 9703 { 9704 mutex_enter(&DEVI(rdip)->devi_lock); 9705 DEVI(rdip)->devi_flags &= ~DEVI_BRANCH_HELD; 9706 DEVI(rdip)->devi_ref--; 9707 mutex_exit(&DEVI(rdip)->devi_lock); 9708 } 9709 9710 int 9711 e_ddi_branch_unconfigure( 9712 dev_info_t *rdip, 9713 dev_info_t **dipp, 9714 uint_t flags) 9715 { 9716 int circ, rv; 9717 int destroy; 9718 char *devnm; 9719 uint_t nflags; 9720 dev_info_t *pdip; 9721 9722 if (dipp) 9723 *dipp = NULL; 9724 9725 if (rdip == NULL) 9726 return (EINVAL); 9727 9728 pdip = ddi_get_parent(rdip); 9729 9730 ASSERT(pdip); 9731 9732 /* 9733 * Check if caller holds pdip busy - can cause deadlocks during 9734 * devfs_clean() 9735 */ 9736 if (DEVI_BUSY_OWNED(pdip)) { 9737 cmn_err(CE_WARN, "e_ddi_branch_unconfigure: failed: parent" 9738 " devinfo node(%p) is busy held", (void *)pdip); 9739 return (EINVAL); 9740 } 9741 9742 destroy = (flags & DEVI_BRANCH_DESTROY) ? 1 : 0; 9743 9744 devnm = kmem_alloc(MAXNAMELEN + 1, KM_SLEEP); 9745 9746 ndi_devi_enter(pdip, &circ); 9747 (void) ddi_deviname(rdip, devnm); 9748 ndi_devi_exit(pdip, circ); 9749 9750 /* 9751 * ddi_deviname() returns a component name with / prepended. 9752 */ 9753 (void) devfs_clean(pdip, devnm + 1, DV_CLEAN_FORCE); 9754 9755 ndi_devi_enter(pdip, &circ); 9756 9757 /* 9758 * Recreate device name as it may have changed state (init/uninit) 9759 * when parent busy lock was dropped for devfs_clean() 9760 */ 9761 (void) ddi_deviname(rdip, devnm); 9762 9763 if (!e_ddi_branch_held(rdip)) { 9764 kmem_free(devnm, MAXNAMELEN + 1); 9765 ndi_devi_exit(pdip, circ); 9766 cmn_err(CE_WARN, "e_ddi_%s_branch: dip(%p) not held", 9767 destroy ? "destroy" : "unconfigure", (void *)rdip); 9768 return (EINVAL); 9769 } 9770 9771 /* 9772 * Release hold on the branch. This is ok since we are holding the 9773 * parent busy. If rdip is not removed, we must do a hold on the 9774 * branch before returning. 9775 */ 9776 e_ddi_branch_rele(rdip); 9777 9778 nflags = NDI_DEVI_OFFLINE; 9779 if (destroy || (flags & DEVI_BRANCH_DESTROY)) { 9780 nflags |= NDI_DEVI_REMOVE; 9781 destroy = 1; 9782 } else { 9783 nflags |= NDI_UNCONFIG; /* uninit but don't remove */ 9784 } 9785 9786 if (flags & DEVI_BRANCH_EVENT) 9787 nflags |= NDI_POST_EVENT; 9788 9789 if (i_ddi_devi_attached(pdip) && 9790 (i_ddi_node_state(rdip) >= DS_INITIALIZED)) { 9791 rv = ndi_devi_unconfig_one(pdip, devnm+1, dipp, nflags); 9792 } else { 9793 rv = e_ddi_devi_unconfig(rdip, dipp, nflags); 9794 if (rv == NDI_SUCCESS) { 9795 ASSERT(!destroy || ddi_get_child(rdip) == NULL); 9796 rv = ndi_devi_offline(rdip, nflags); 9797 } 9798 } 9799 9800 if (!destroy || rv != NDI_SUCCESS) { 9801 /* The dip still exists, so do a hold */ 9802 e_ddi_branch_hold(rdip); 9803 } 9804 out: 9805 kmem_free(devnm, MAXNAMELEN + 1); 9806 ndi_devi_exit(pdip, circ); 9807 return (ndi2errno(rv)); 9808 } 9809 9810 int 9811 e_ddi_branch_destroy(dev_info_t *rdip, dev_info_t **dipp, uint_t flag) 9812 { 9813 return (e_ddi_branch_unconfigure(rdip, dipp, 9814 flag|DEVI_BRANCH_DESTROY)); 9815 } 9816 9817 /* 9818 * Number of chains for hash table 9819 */ 9820 #define NUMCHAINS 17 9821 9822 /* 9823 * Devinfo busy arg 9824 */ 9825 struct devi_busy { 9826 int dv_total; 9827 int s_total; 9828 mod_hash_t *dv_hash; 9829 mod_hash_t *s_hash; 9830 int (*callback)(dev_info_t *, void *, uint_t); 9831 void *arg; 9832 }; 9833 9834 static int 9835 visit_dip(dev_info_t *dip, void *arg) 9836 { 9837 uintptr_t sbusy, dvbusy, ref; 9838 struct devi_busy *bsp = arg; 9839 9840 ASSERT(bsp->callback); 9841 9842 /* 9843 * A dip cannot be busy if its reference count is 0 9844 */ 9845 if ((ref = e_ddi_devi_holdcnt(dip)) == 0) { 9846 return (bsp->callback(dip, bsp->arg, 0)); 9847 } 9848 9849 if (mod_hash_find(bsp->dv_hash, dip, (mod_hash_val_t *)&dvbusy)) 9850 dvbusy = 0; 9851 9852 /* 9853 * To catch device opens currently maintained on specfs common snodes. 9854 */ 9855 if (mod_hash_find(bsp->s_hash, dip, (mod_hash_val_t *)&sbusy)) 9856 sbusy = 0; 9857 9858 #ifdef DEBUG 9859 if (ref < sbusy || ref < dvbusy) { 9860 cmn_err(CE_WARN, "dip(%p): sopen = %lu, dvopen = %lu " 9861 "dip ref = %lu\n", (void *)dip, sbusy, dvbusy, ref); 9862 } 9863 #endif 9864 9865 dvbusy = (sbusy > dvbusy) ? sbusy : dvbusy; 9866 9867 return (bsp->callback(dip, bsp->arg, dvbusy)); 9868 } 9869 9870 static int 9871 visit_snode(struct snode *sp, void *arg) 9872 { 9873 uintptr_t sbusy; 9874 dev_info_t *dip; 9875 int count; 9876 struct devi_busy *bsp = arg; 9877 9878 ASSERT(sp); 9879 9880 /* 9881 * The stable lock is held. This prevents 9882 * the snode and its associated dip from 9883 * going away. 9884 */ 9885 dip = NULL; 9886 count = spec_devi_open_count(sp, &dip); 9887 9888 if (count <= 0) 9889 return (DDI_WALK_CONTINUE); 9890 9891 ASSERT(dip); 9892 9893 if (mod_hash_remove(bsp->s_hash, dip, (mod_hash_val_t *)&sbusy)) 9894 sbusy = count; 9895 else 9896 sbusy += count; 9897 9898 if (mod_hash_insert(bsp->s_hash, dip, (mod_hash_val_t)sbusy)) { 9899 cmn_err(CE_WARN, "%s: s_hash insert failed: dip=0x%p, " 9900 "sbusy = %lu", "e_ddi_branch_referenced", 9901 (void *)dip, sbusy); 9902 } 9903 9904 bsp->s_total += count; 9905 9906 return (DDI_WALK_CONTINUE); 9907 } 9908 9909 static void 9910 visit_dvnode(struct dv_node *dv, void *arg) 9911 { 9912 uintptr_t dvbusy; 9913 uint_t count; 9914 struct vnode *vp; 9915 struct devi_busy *bsp = arg; 9916 9917 ASSERT(dv && dv->dv_devi); 9918 9919 vp = DVTOV(dv); 9920 9921 mutex_enter(&vp->v_lock); 9922 count = vp->v_count; 9923 mutex_exit(&vp->v_lock); 9924 9925 if (!count) 9926 return; 9927 9928 if (mod_hash_remove(bsp->dv_hash, dv->dv_devi, 9929 (mod_hash_val_t *)&dvbusy)) 9930 dvbusy = count; 9931 else 9932 dvbusy += count; 9933 9934 if (mod_hash_insert(bsp->dv_hash, dv->dv_devi, 9935 (mod_hash_val_t)dvbusy)) { 9936 cmn_err(CE_WARN, "%s: dv_hash insert failed: dip=0x%p, " 9937 "dvbusy=%lu", "e_ddi_branch_referenced", 9938 (void *)dv->dv_devi, dvbusy); 9939 } 9940 9941 bsp->dv_total += count; 9942 } 9943 9944 /* 9945 * Returns reference count on success or -1 on failure. 9946 */ 9947 int 9948 e_ddi_branch_referenced( 9949 dev_info_t *rdip, 9950 int (*callback)(dev_info_t *dip, void *arg, uint_t ref), 9951 void *arg) 9952 { 9953 int circ; 9954 char *path; 9955 dev_info_t *pdip; 9956 struct devi_busy bsa = {0}; 9957 9958 ASSERT(rdip); 9959 9960 path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 9961 9962 ndi_hold_devi(rdip); 9963 9964 pdip = ddi_get_parent(rdip); 9965 9966 ASSERT(pdip); 9967 9968 /* 9969 * Check if caller holds pdip busy - can cause deadlocks during 9970 * devfs_walk() 9971 */ 9972 if (!e_ddi_branch_held(rdip) || DEVI_BUSY_OWNED(pdip)) { 9973 cmn_err(CE_WARN, "e_ddi_branch_referenced: failed: " 9974 "devinfo branch(%p) not held or parent busy held", 9975 (void *)rdip); 9976 ndi_rele_devi(rdip); 9977 kmem_free(path, MAXPATHLEN); 9978 return (-1); 9979 } 9980 9981 ndi_devi_enter(pdip, &circ); 9982 (void) ddi_pathname(rdip, path); 9983 ndi_devi_exit(pdip, circ); 9984 9985 bsa.dv_hash = mod_hash_create_ptrhash("dv_node busy hash", NUMCHAINS, 9986 mod_hash_null_valdtor, sizeof (struct dev_info)); 9987 9988 bsa.s_hash = mod_hash_create_ptrhash("snode busy hash", NUMCHAINS, 9989 mod_hash_null_valdtor, sizeof (struct snode)); 9990 9991 if (devfs_walk(path, visit_dvnode, &bsa)) { 9992 cmn_err(CE_WARN, "e_ddi_branch_referenced: " 9993 "devfs walk failed for: %s", path); 9994 kmem_free(path, MAXPATHLEN); 9995 bsa.s_total = bsa.dv_total = -1; 9996 goto out; 9997 } 9998 9999 kmem_free(path, MAXPATHLEN); 10000 10001 /* 10002 * Walk the snode table to detect device opens, which are currently 10003 * maintained on specfs common snodes. 10004 */ 10005 spec_snode_walk(visit_snode, &bsa); 10006 10007 if (callback == NULL) 10008 goto out; 10009 10010 bsa.callback = callback; 10011 bsa.arg = arg; 10012 10013 if (visit_dip(rdip, &bsa) == DDI_WALK_CONTINUE) { 10014 ndi_devi_enter(rdip, &circ); 10015 ddi_walk_devs(ddi_get_child(rdip), visit_dip, &bsa); 10016 ndi_devi_exit(rdip, circ); 10017 } 10018 10019 out: 10020 ndi_rele_devi(rdip); 10021 mod_hash_destroy_ptrhash(bsa.s_hash); 10022 mod_hash_destroy_ptrhash(bsa.dv_hash); 10023 return (bsa.s_total > bsa.dv_total ? bsa.s_total : bsa.dv_total); 10024 } 10025