bsd_kernel.c revision 294547
1/* $FreeBSD: head/sys/boot/kshim/bsd_kernel.c 294547 2016-01-22 06:26:11Z wma $ */ 2/*- 3 * Copyright (c) 2013 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <bsd_global.h> 28 29struct usb_process usb_process[USB_PROC_MAX]; 30 31static device_t usb_pci_root; 32 33/*------------------------------------------------------------------------* 34 * Implementation of mutex API 35 *------------------------------------------------------------------------*/ 36 37struct mtx Giant; 38int (*bus_alloc_resource_any_cb)(struct resource *res, device_t dev, 39 int type, int *rid, unsigned int flags); 40int (*ofw_bus_status_ok_cb)(device_t dev); 41int (*ofw_bus_is_compatible_cb)(device_t dev, char *name); 42 43static void 44mtx_system_init(void *arg) 45{ 46 mtx_init(&Giant, "Giant", NULL, MTX_DEF | MTX_RECURSE); 47} 48SYSINIT(mtx_system_init, SI_SUB_LOCK, SI_ORDER_MIDDLE, mtx_system_init, NULL); 49 50int 51bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, 52 bus_size_t boundary, bus_addr_t lowaddr, 53 bus_addr_t highaddr, bus_dma_filter_t *filter, 54 void *filterarg, bus_size_t maxsize, int nsegments, 55 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 56 void *lockfuncarg, bus_dma_tag_t *dmat) 57{ 58 struct bus_dma_tag *ret; 59 60 ret = malloc(sizeof(struct bus_dma_tag), XXX, XXX); 61 if (*dmat == NULL) 62 return (ENOMEM); 63 ret->alignment = alignment; 64 ret->maxsize = maxsize; 65 66 *dmat = ret; 67 68 return (0); 69} 70 71int 72bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, 73 bus_dmamap_t *mapp) 74{ 75 void *addr; 76 77 addr = malloc(dmat->maxsize + dmat->alignment, XXX, XXX); 78 if (addr == 0) 79 return (ENOMEM); 80 81 *mapp = addr; 82 addr = (void*)(((uintptr_t)addr + dmat->alignment - 1) & ~(dmat->alignment - 1)); 83 84 *vaddr = addr; 85 return (0); 86} 87 88int 89bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, 90 bus_size_t buflen, bus_dmamap_callback_t *callback, 91 void *callback_arg, int flags) 92{ 93 bus_dma_segment_t segs[1]; 94 95 segs[0].ds_addr = (uintptr_t)buf; 96 segs[0].ds_len = buflen; 97 98 (*callback)(callback_arg, segs, 1, 0); 99 100 return (0); 101} 102 103void 104bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map) 105{ 106 107 free(map, XXX); 108} 109 110int 111bus_dma_tag_destroy(bus_dma_tag_t dmat) 112{ 113 114 free(dmat, XXX); 115 return (0); 116} 117 118struct resource * 119bus_alloc_resource_any(device_t dev, int type, int *rid, unsigned int flags) 120{ 121 struct resource *res; 122 int ret = EINVAL; 123 124 res = malloc(sizeof(*res), XXX, XXX); 125 if (res == NULL) 126 return (NULL); 127 128 res->__r_i = malloc(sizeof(struct resource_i), XXX, XXX); 129 if (res->__r_i == NULL) { 130 free(res, XXX); 131 return (NULL); 132 } 133 134 if (bus_alloc_resource_any_cb != NULL) 135 ret = (*bus_alloc_resource_any_cb)(res, dev, type, rid, flags); 136 if (ret == 0) 137 return (res); 138 139 free(res->__r_i, XXX); 140 free(res, XXX); 141 return (NULL); 142} 143 144int 145bus_alloc_resources(device_t dev, struct resource_spec *rs, 146 struct resource **res) 147{ 148 int i; 149 150 for (i = 0; rs[i].type != -1; i++) 151 res[i] = NULL; 152 for (i = 0; rs[i].type != -1; i++) { 153 res[i] = bus_alloc_resource_any(dev, 154 rs[i].type, &rs[i].rid, rs[i].flags); 155 if (res[i] == NULL && !(rs[i].flags & RF_OPTIONAL)) { 156 bus_release_resources(dev, rs, res); 157 return (ENXIO); 158 } 159 } 160 return (0); 161} 162 163void 164bus_release_resources(device_t dev, const struct resource_spec *rs, 165 struct resource **res) 166{ 167 int i; 168 169 for (i = 0; rs[i].type != -1; i++) 170 if (res[i] != NULL) { 171 bus_release_resource( 172 dev, rs[i].type, rs[i].rid, res[i]); 173 res[i] = NULL; 174 } 175} 176 177int 178bus_setup_intr(device_t dev, struct resource *r, int flags, 179 driver_filter_t filter, driver_intr_t handler, void *arg, void **cookiep) 180{ 181 182 dev->dev_irq_filter = filter; 183 dev->dev_irq_fn = handler; 184 dev->dev_irq_arg = arg; 185 186 return (0); 187} 188 189int 190bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 191{ 192 193 dev->dev_irq_filter = NULL; 194 dev->dev_irq_fn = NULL; 195 dev->dev_irq_arg = NULL; 196 197 return (0); 198} 199 200int 201bus_release_resource(device_t dev, int type, int rid, struct resource *r) 202{ 203 /* Resource releasing is not supported */ 204 return (EINVAL); 205} 206 207int 208bus_generic_attach(device_t dev) 209{ 210 device_t child; 211 212 TAILQ_FOREACH(child, &dev->dev_children, dev_link) { 213 device_probe_and_attach(child); 214 } 215 216 return (0); 217} 218 219bus_space_tag_t 220rman_get_bustag(struct resource *r) 221{ 222 223 return (r->r_bustag); 224} 225 226bus_space_handle_t 227rman_get_bushandle(struct resource *r) 228{ 229 230 return (r->r_bushandle); 231} 232 233u_long 234rman_get_size(struct resource *r) 235{ 236 237 return (r->__r_i->r_end - r->__r_i->r_start + 1); 238} 239 240int 241ofw_bus_status_okay(device_t dev) 242{ 243 if (ofw_bus_status_ok_cb == NULL) 244 return (0); 245 246 return ((*ofw_bus_status_ok_cb)(dev)); 247} 248 249int 250ofw_bus_is_compatible(device_t dev, char *name) 251{ 252 if (ofw_bus_is_compatible_cb == NULL) 253 return (0); 254 255 return ((*ofw_bus_is_compatible_cb)(dev, name)); 256} 257 258void 259mtx_init(struct mtx *mtx, const char *name, const char *type, int opt) 260{ 261 mtx->owned = 0; 262 mtx->parent = mtx; 263} 264 265void 266mtx_lock(struct mtx *mtx) 267{ 268 mtx = mtx->parent; 269 mtx->owned++; 270} 271 272void 273mtx_unlock(struct mtx *mtx) 274{ 275 mtx = mtx->parent; 276 mtx->owned--; 277} 278 279int 280mtx_owned(struct mtx *mtx) 281{ 282 mtx = mtx->parent; 283 return (mtx->owned != 0); 284} 285 286void 287mtx_destroy(struct mtx *mtx) 288{ 289 /* NOP */ 290} 291 292/*------------------------------------------------------------------------* 293 * Implementation of shared/exclusive mutex API 294 *------------------------------------------------------------------------*/ 295 296void 297sx_init_flags(struct sx *sx, const char *name, int flags) 298{ 299 sx->owned = 0; 300} 301 302void 303sx_destroy(struct sx *sx) 304{ 305 /* NOP */ 306} 307 308void 309sx_xlock(struct sx *sx) 310{ 311 sx->owned++; 312} 313 314void 315sx_xunlock(struct sx *sx) 316{ 317 sx->owned--; 318} 319 320int 321sx_xlocked(struct sx *sx) 322{ 323 return (sx->owned != 0); 324} 325 326/*------------------------------------------------------------------------* 327 * Implementaiton of condition variable API 328 *------------------------------------------------------------------------*/ 329 330void 331cv_init(struct cv *cv, const char *desc) 332{ 333 cv->sleeping = 0; 334} 335 336void 337cv_destroy(struct cv *cv) 338{ 339 /* NOP */ 340} 341 342void 343cv_wait(struct cv *cv, struct mtx *mtx) 344{ 345 cv_timedwait(cv, mtx, -1); 346} 347 348int 349cv_timedwait(struct cv *cv, struct mtx *mtx, int timo) 350{ 351 int start = ticks; 352 int delta; 353 int time = 0; 354 355 if (cv->sleeping) 356 return (EWOULDBLOCK); /* not allowed */ 357 358 cv->sleeping = 1; 359 360 while (cv->sleeping) { 361 if (timo >= 0) { 362 delta = ticks - start; 363 if (delta >= timo || delta < 0) 364 break; 365 } 366 mtx_unlock(mtx); 367 368 usb_idle(); 369 370 if (++time >= (1000000 / hz)) { 371 time = 0; 372 callout_process(1); 373 } 374 375 /* Sleep for 1 us */ 376 delay(1); 377 378 mtx_lock(mtx); 379 } 380 381 if (cv->sleeping) { 382 cv->sleeping = 0; 383 return (EWOULDBLOCK); /* not allowed */ 384 } 385 return (0); 386} 387 388void 389cv_signal(struct cv *cv) 390{ 391 cv->sleeping = 0; 392} 393 394void 395cv_broadcast(struct cv *cv) 396{ 397 cv->sleeping = 0; 398} 399 400/*------------------------------------------------------------------------* 401 * Implementation of callout API 402 *------------------------------------------------------------------------*/ 403 404static void callout_proc_msg(struct usb_proc_msg *); 405 406volatile int ticks = 0; 407 408static LIST_HEAD(, callout) head_callout = LIST_HEAD_INITIALIZER(&head_callout); 409 410static struct mtx mtx_callout; 411static struct usb_proc_msg callout_msg[2]; 412 413static void 414callout_system_init(void *arg) 415{ 416 mtx_init(&mtx_callout, "callout-mtx", NULL, MTX_DEF | MTX_RECURSE); 417 418 callout_msg[0].pm_callback = &callout_proc_msg; 419 callout_msg[1].pm_callback = &callout_proc_msg; 420} 421SYSINIT(callout_system_init, SI_SUB_LOCK, SI_ORDER_MIDDLE, callout_system_init, NULL); 422 423static void 424callout_callback(struct callout *c) 425{ 426 mtx_lock(c->mtx); 427 428 mtx_lock(&mtx_callout); 429 if (c->entry.le_prev != NULL) { 430 LIST_REMOVE(c, entry); 431 c->entry.le_prev = NULL; 432 } 433 mtx_unlock(&mtx_callout); 434 435 if (c->func) 436 (c->func) (c->arg); 437 438 if (!(c->flags & CALLOUT_RETURNUNLOCKED)) 439 mtx_unlock(c->mtx); 440} 441 442void 443callout_process(int timeout) 444{ 445 ticks += timeout; 446 usb_proc_msignal(usb_process + 2, &callout_msg[0], &callout_msg[1]); 447} 448 449static void 450callout_proc_msg(struct usb_proc_msg *pmsg) 451{ 452 struct callout *c; 453 int delta; 454 455repeat: 456 mtx_lock(&mtx_callout); 457 458 LIST_FOREACH(c, &head_callout, entry) { 459 460 delta = c->timeout - ticks; 461 if (delta < 0) { 462 mtx_unlock(&mtx_callout); 463 464 callout_callback(c); 465 466 goto repeat; 467 } 468 } 469 mtx_unlock(&mtx_callout); 470} 471 472void 473callout_init_mtx(struct callout *c, struct mtx *mtx, int flags) 474{ 475 memset(c, 0, sizeof(*c)); 476 477 if (mtx == NULL) 478 mtx = &Giant; 479 480 c->mtx = mtx; 481 c->flags = (flags & CALLOUT_RETURNUNLOCKED); 482} 483 484void 485callout_reset(struct callout *c, int to_ticks, 486 void (*func) (void *), void *arg) 487{ 488 callout_stop(c); 489 490 c->func = func; 491 c->arg = arg; 492 c->timeout = ticks + to_ticks; 493 494 mtx_lock(&mtx_callout); 495 LIST_INSERT_HEAD(&head_callout, c, entry); 496 mtx_unlock(&mtx_callout); 497} 498 499void 500callout_stop(struct callout *c) 501{ 502 mtx_lock(&mtx_callout); 503 504 if (c->entry.le_prev != NULL) { 505 LIST_REMOVE(c, entry); 506 c->entry.le_prev = NULL; 507 } 508 mtx_unlock(&mtx_callout); 509 510 c->func = NULL; 511 c->arg = NULL; 512} 513 514void 515callout_drain(struct callout *c) 516{ 517 if (c->mtx == NULL) 518 return; /* not initialised */ 519 520 mtx_lock(c->mtx); 521 callout_stop(c); 522 mtx_unlock(c->mtx); 523} 524 525int 526callout_pending(struct callout *c) 527{ 528 int retval; 529 530 mtx_lock(&mtx_callout); 531 retval = (c->entry.le_prev != NULL); 532 mtx_unlock(&mtx_callout); 533 534 return (retval); 535} 536 537/*------------------------------------------------------------------------* 538 * Implementation of device API 539 *------------------------------------------------------------------------*/ 540 541static const char unknown_string[] = { "unknown" }; 542 543static TAILQ_HEAD(, module_data) module_head = 544 TAILQ_HEAD_INITIALIZER(module_head); 545 546static uint8_t 547devclass_equal(const char *a, const char *b) 548{ 549 char ta, tb; 550 551 if (a == b) 552 return (1); 553 554 while (1) { 555 ta = *a; 556 tb = *b; 557 if (ta != tb) 558 return (0); 559 if (ta == 0) 560 break; 561 a++; 562 b++; 563 } 564 return (1); 565} 566 567int 568bus_generic_resume(device_t dev) 569{ 570 return (0); 571} 572 573int 574bus_generic_shutdown(device_t dev) 575{ 576 return (0); 577} 578 579int 580bus_generic_suspend(device_t dev) 581{ 582 return (0); 583} 584 585int 586bus_generic_print_child(device_t dev, device_t child) 587{ 588 return (0); 589} 590 591void 592bus_generic_driver_added(device_t dev, driver_t *driver) 593{ 594 return; 595} 596 597device_t 598device_get_parent(device_t dev) 599{ 600 return (dev ? dev->dev_parent : NULL); 601} 602 603void 604device_set_interrupt(device_t dev, driver_filter_t *filter, 605 driver_intr_t *fn, void *arg) 606{ 607 dev->dev_irq_filter = filter; 608 dev->dev_irq_fn = fn; 609 dev->dev_irq_arg = arg; 610} 611 612void 613device_run_interrupts(device_t parent) 614{ 615 device_t child; 616 617 if (parent == NULL) 618 return; 619 620 TAILQ_FOREACH(child, &parent->dev_children, dev_link) { 621 int status; 622 if (child->dev_irq_filter != NULL) 623 status = child->dev_irq_filter(child->dev_irq_arg); 624 else 625 status = FILTER_SCHEDULE_THREAD; 626 627 if (status == FILTER_SCHEDULE_THREAD) { 628 if (child->dev_irq_fn != NULL) 629 (child->dev_irq_fn) (child->dev_irq_arg); 630 } 631 } 632} 633 634void 635device_set_ivars(device_t dev, void *ivars) 636{ 637 dev->dev_aux = ivars; 638} 639 640void * 641device_get_ivars(device_t dev) 642{ 643 return (dev ? dev->dev_aux : NULL); 644} 645 646int 647device_get_unit(device_t dev) 648{ 649 return (dev ? dev->dev_unit : 0); 650} 651 652int 653bus_generic_detach(device_t dev) 654{ 655 device_t child; 656 int error; 657 658 if (!dev->dev_attached) 659 return (EBUSY); 660 661 TAILQ_FOREACH(child, &dev->dev_children, dev_link) { 662 if ((error = device_detach(child)) != 0) 663 return (error); 664 } 665 return (0); 666} 667 668const char * 669device_get_nameunit(device_t dev) 670{ 671 if (dev && dev->dev_nameunit[0]) 672 return (dev->dev_nameunit); 673 674 return (unknown_string); 675} 676 677static uint8_t 678devclass_create(devclass_t *dc_pp) 679{ 680 if (dc_pp == NULL) { 681 return (1); 682 } 683 if (dc_pp[0] == NULL) { 684 dc_pp[0] = malloc(sizeof(**(dc_pp)), 685 M_DEVBUF, M_WAITOK | M_ZERO); 686 687 if (dc_pp[0] == NULL) { 688 return (1); 689 } 690 } 691 return (0); 692} 693 694static const struct module_data * 695devclass_find_create(const char *classname) 696{ 697 const struct module_data *mod; 698 699 TAILQ_FOREACH(mod, &module_head, entry) { 700 if (devclass_equal(mod->mod_name, classname)) { 701 if (devclass_create(mod->devclass_pp)) { 702 continue; 703 } 704 return (mod); 705 } 706 } 707 return (NULL); 708} 709 710static uint8_t 711devclass_add_device(const struct module_data *mod, device_t dev) 712{ 713 device_t *pp_dev; 714 device_t *end; 715 uint8_t unit; 716 717 pp_dev = mod->devclass_pp[0]->dev_list; 718 end = pp_dev + DEVCLASS_MAXUNIT; 719 unit = 0; 720 721 while (pp_dev != end) { 722 if (*pp_dev == NULL) { 723 *pp_dev = dev; 724 dev->dev_unit = unit; 725 dev->dev_module = mod; 726 snprintf(dev->dev_nameunit, 727 sizeof(dev->dev_nameunit), 728 "%s%d", device_get_name(dev), unit); 729 return (0); 730 } 731 pp_dev++; 732 unit++; 733 } 734 DPRINTF("Could not add device to devclass.\n"); 735 return (1); 736} 737 738static void 739devclass_delete_device(const struct module_data *mod, device_t dev) 740{ 741 if (mod == NULL) { 742 return; 743 } 744 mod->devclass_pp[0]->dev_list[dev->dev_unit] = NULL; 745 dev->dev_module = NULL; 746} 747 748static device_t 749make_device(device_t parent, const char *name) 750{ 751 device_t dev = NULL; 752 const struct module_data *mod = NULL; 753 754 if (name) { 755 756 mod = devclass_find_create(name); 757 758 if (!mod) { 759 760 DPRINTF("%s:%d:%s: can't find device " 761 "class %s\n", __FILE__, __LINE__, 762 __FUNCTION__, name); 763 764 goto done; 765 } 766 } 767 dev = malloc(sizeof(*dev), 768 M_DEVBUF, M_WAITOK | M_ZERO); 769 770 if (dev == NULL) 771 goto done; 772 773 dev->dev_parent = parent; 774 TAILQ_INIT(&dev->dev_children); 775 776 if (name) { 777 dev->dev_fixed_class = 1; 778 if (devclass_add_device(mod, dev)) { 779 goto error; 780 } 781 } 782done: 783 return (dev); 784 785error: 786 if (dev) { 787 free(dev, M_DEVBUF); 788 } 789 return (NULL); 790} 791 792device_t 793device_add_child(device_t dev, const char *name, int unit) 794{ 795 device_t child; 796 797 if (unit != -1) { 798 device_printf(dev, "Unit is not -1\n"); 799 } 800 child = make_device(dev, name); 801 if (child == NULL) { 802 device_printf(dev, "Could not add child '%s'\n", name); 803 goto done; 804 } 805 if (dev == NULL) { 806 /* no parent */ 807 goto done; 808 } 809 TAILQ_INSERT_TAIL(&dev->dev_children, child, dev_link); 810done: 811 return (child); 812} 813 814int 815device_delete_child(device_t dev, device_t child) 816{ 817 int error = 0; 818 device_t grandchild; 819 820 /* remove children first */ 821 822 while ((grandchild = TAILQ_FIRST(&child->dev_children))) { 823 error = device_delete_child(child, grandchild); 824 if (error) { 825 device_printf(dev, "Error deleting child!\n"); 826 goto done; 827 } 828 } 829 830 error = device_detach(child); 831 832 if (error) 833 goto done; 834 835 devclass_delete_device(child->dev_module, child); 836 837 if (dev != NULL) { 838 /* remove child from parent */ 839 TAILQ_REMOVE(&dev->dev_children, child, dev_link); 840 } 841 free(child, M_DEVBUF); 842 843done: 844 return (error); 845} 846 847int 848device_delete_children(device_t dev) 849{ 850 device_t child; 851 int error = 0; 852 853 while ((child = TAILQ_FIRST(&dev->dev_children))) { 854 error = device_delete_child(dev, child); 855 if (error) { 856 device_printf(dev, "Error deleting child!\n"); 857 break; 858 } 859 } 860 return (error); 861} 862 863void 864device_quiet(device_t dev) 865{ 866 dev->dev_quiet = 1; 867} 868 869const char * 870device_get_desc(device_t dev) 871{ 872 if (dev) 873 return &(dev->dev_desc[0]); 874 return (unknown_string); 875} 876 877static int 878default_method(void) 879{ 880 /* do nothing */ 881 DPRINTF("Default method called\n"); 882 return (0); 883} 884 885void * 886device_get_method(device_t dev, const char *what) 887{ 888 const struct device_method *mtod; 889 890 mtod = dev->dev_module->driver->methods; 891 while (mtod->func != NULL) { 892 if (devclass_equal(mtod->desc, what)) { 893 return (mtod->func); 894 } 895 mtod++; 896 } 897 return ((void *)&default_method); 898} 899 900const char * 901device_get_name(device_t dev) 902{ 903 if (dev == NULL) 904 return (unknown_string); 905 906 return (dev->dev_module->driver->name); 907} 908 909static int 910device_allocate_softc(device_t dev) 911{ 912 const struct module_data *mod; 913 914 mod = dev->dev_module; 915 916 if ((dev->dev_softc_alloc == 0) && 917 (mod->driver->size != 0)) { 918 dev->dev_sc = malloc(mod->driver->size, 919 M_DEVBUF, M_WAITOK | M_ZERO); 920 921 if (dev->dev_sc == NULL) 922 return (ENOMEM); 923 924 dev->dev_softc_alloc = 1; 925 } 926 return (0); 927} 928 929int 930device_probe_and_attach(device_t dev) 931{ 932 const struct module_data *mod; 933 const char *bus_name_parent; 934 935 bus_name_parent = device_get_name(device_get_parent(dev)); 936 937 if (dev->dev_attached) 938 return (0); /* fail-safe */ 939 940 if (dev->dev_fixed_class) { 941 942 mod = dev->dev_module; 943 944 if (DEVICE_PROBE(dev) <= 0) { 945 946 if (device_allocate_softc(dev) == 0) { 947 948 if (DEVICE_ATTACH(dev) == 0) { 949 /* success */ 950 dev->dev_attached = 1; 951 return (0); 952 } 953 } 954 } 955 device_detach(dev); 956 957 goto error; 958 } 959 /* 960 * Else find a module for our device, if any 961 */ 962 963 TAILQ_FOREACH(mod, &module_head, entry) { 964 if (devclass_equal(mod->bus_name, bus_name_parent)) { 965 if (devclass_create(mod->devclass_pp)) { 966 continue; 967 } 968 if (devclass_add_device(mod, dev)) { 969 continue; 970 } 971 if (DEVICE_PROBE(dev) <= 0) { 972 973 if (device_allocate_softc(dev) == 0) { 974 975 if (DEVICE_ATTACH(dev) == 0) { 976 /* success */ 977 dev->dev_attached = 1; 978 return (0); 979 } 980 } 981 } 982 /* else try next driver */ 983 984 device_detach(dev); 985 } 986 } 987 988error: 989 return (ENODEV); 990} 991 992int 993device_detach(device_t dev) 994{ 995 const struct module_data *mod = dev->dev_module; 996 int error; 997 998 if (dev->dev_attached) { 999 1000 error = DEVICE_DETACH(dev); 1001 if (error) { 1002 return error; 1003 } 1004 dev->dev_attached = 0; 1005 } 1006 device_set_softc(dev, NULL); 1007 1008 if (dev->dev_fixed_class == 0) 1009 devclass_delete_device(mod, dev); 1010 1011 return (0); 1012} 1013 1014void 1015device_set_softc(device_t dev, void *softc) 1016{ 1017 if (dev->dev_softc_alloc) { 1018 free(dev->dev_sc, M_DEVBUF); 1019 dev->dev_sc = NULL; 1020 } 1021 dev->dev_sc = softc; 1022 dev->dev_softc_alloc = 0; 1023} 1024 1025void * 1026device_get_softc(device_t dev) 1027{ 1028 if (dev == NULL) 1029 return (NULL); 1030 1031 return (dev->dev_sc); 1032} 1033 1034int 1035device_is_attached(device_t dev) 1036{ 1037 return (dev->dev_attached); 1038} 1039 1040void 1041device_set_desc(device_t dev, const char *desc) 1042{ 1043 snprintf(dev->dev_desc, sizeof(dev->dev_desc), "%s", desc); 1044} 1045 1046void 1047device_set_desc_copy(device_t dev, const char *desc) 1048{ 1049 device_set_desc(dev, desc); 1050} 1051 1052void * 1053devclass_get_softc(devclass_t dc, int unit) 1054{ 1055 return (device_get_softc(devclass_get_device(dc, unit))); 1056} 1057 1058int 1059devclass_get_maxunit(devclass_t dc) 1060{ 1061 int max_unit = 0; 1062 1063 if (dc) { 1064 max_unit = DEVCLASS_MAXUNIT; 1065 while (max_unit--) { 1066 if (dc->dev_list[max_unit]) { 1067 break; 1068 } 1069 } 1070 max_unit++; 1071 } 1072 return (max_unit); 1073} 1074 1075device_t 1076devclass_get_device(devclass_t dc, int unit) 1077{ 1078 return (((unit < 0) || (unit >= DEVCLASS_MAXUNIT) || (dc == NULL)) ? 1079 NULL : dc->dev_list[unit]); 1080} 1081 1082devclass_t 1083devclass_find(const char *classname) 1084{ 1085 const struct module_data *mod; 1086 1087 TAILQ_FOREACH(mod, &module_head, entry) { 1088 if (devclass_equal(mod->driver->name, classname)) 1089 return (mod->devclass_pp[0]); 1090 } 1091 return (NULL); 1092} 1093 1094void 1095module_register(void *data) 1096{ 1097 struct module_data *mdata = data; 1098 1099 TAILQ_INSERT_TAIL(&module_head, mdata, entry); 1100} 1101 1102/*------------------------------------------------------------------------* 1103 * System startup 1104 *------------------------------------------------------------------------*/ 1105 1106static void 1107sysinit_run(const void **ppdata) 1108{ 1109 const struct sysinit *psys; 1110 1111 while ((psys = *ppdata) != NULL) { 1112 (psys->func) (psys->data); 1113 ppdata++; 1114 } 1115} 1116 1117/*------------------------------------------------------------------------* 1118 * USB process API 1119 *------------------------------------------------------------------------*/ 1120 1121static int usb_do_process(struct usb_process *); 1122static int usb_proc_level = -1; 1123static struct mtx usb_proc_mtx; 1124 1125void 1126usb_idle(void) 1127{ 1128 int old_level = usb_proc_level; 1129 int old_giant = Giant.owned; 1130 int worked; 1131 1132 device_run_interrupts(usb_pci_root); 1133 1134 do { 1135 worked = 0; 1136 Giant.owned = 0; 1137 1138 while (++usb_proc_level < USB_PROC_MAX) 1139 worked |= usb_do_process(usb_process + usb_proc_level); 1140 1141 usb_proc_level = old_level; 1142 Giant.owned = old_giant; 1143 1144 } while (worked); 1145} 1146 1147void 1148usb_init(void) 1149{ 1150 sysinit_run(sysinit_data); 1151} 1152 1153void 1154usb_uninit(void) 1155{ 1156 sysinit_run(sysuninit_data); 1157} 1158 1159static void 1160usb_process_init_sub(struct usb_process *up) 1161{ 1162 TAILQ_INIT(&up->up_qhead); 1163 1164 cv_init(&up->up_cv, "-"); 1165 cv_init(&up->up_drain, "usbdrain"); 1166 1167 up->up_mtx = &usb_proc_mtx; 1168} 1169 1170static void 1171usb_process_init(void *arg) 1172{ 1173 uint8_t x; 1174 1175 mtx_init(&usb_proc_mtx, "usb-proc-mtx", NULL, MTX_DEF | MTX_RECURSE); 1176 1177 for (x = 0; x != USB_PROC_MAX; x++) 1178 usb_process_init_sub(&usb_process[x]); 1179 1180} 1181SYSINIT(usb_process_init, SI_SUB_LOCK, SI_ORDER_MIDDLE, usb_process_init, NULL); 1182 1183static int 1184usb_do_process(struct usb_process *up) 1185{ 1186 struct usb_proc_msg *pm; 1187 int worked = 0; 1188 1189 mtx_lock(&usb_proc_mtx); 1190 1191repeat: 1192 pm = TAILQ_FIRST(&up->up_qhead); 1193 1194 if (pm != NULL) { 1195 1196 worked = 1; 1197 1198 (pm->pm_callback) (pm); 1199 1200 if (pm == TAILQ_FIRST(&up->up_qhead)) { 1201 /* nothing changed */ 1202 TAILQ_REMOVE(&up->up_qhead, pm, pm_qentry); 1203 pm->pm_qentry.tqe_prev = NULL; 1204 } 1205 goto repeat; 1206 } 1207 mtx_unlock(&usb_proc_mtx); 1208 1209 return (worked); 1210} 1211 1212void * 1213usb_proc_msignal(struct usb_process *up, void *_pm0, void *_pm1) 1214{ 1215 struct usb_proc_msg *pm0 = _pm0; 1216 struct usb_proc_msg *pm1 = _pm1; 1217 struct usb_proc_msg *pm2; 1218 usb_size_t d; 1219 uint8_t t; 1220 1221 t = 0; 1222 1223 if (pm0->pm_qentry.tqe_prev) { 1224 t |= 1; 1225 } 1226 if (pm1->pm_qentry.tqe_prev) { 1227 t |= 2; 1228 } 1229 if (t == 0) { 1230 /* 1231 * No entries are queued. Queue "pm0" and use the existing 1232 * message number. 1233 */ 1234 pm2 = pm0; 1235 } else if (t == 1) { 1236 /* Check if we need to increment the message number. */ 1237 if (pm0->pm_num == up->up_msg_num) { 1238 up->up_msg_num++; 1239 } 1240 pm2 = pm1; 1241 } else if (t == 2) { 1242 /* Check if we need to increment the message number. */ 1243 if (pm1->pm_num == up->up_msg_num) { 1244 up->up_msg_num++; 1245 } 1246 pm2 = pm0; 1247 } else if (t == 3) { 1248 /* 1249 * Both entries are queued. Re-queue the entry closest to 1250 * the end. 1251 */ 1252 d = (pm1->pm_num - pm0->pm_num); 1253 1254 /* Check sign after subtraction */ 1255 if (d & 0x80000000) { 1256 pm2 = pm0; 1257 } else { 1258 pm2 = pm1; 1259 } 1260 1261 TAILQ_REMOVE(&up->up_qhead, pm2, pm_qentry); 1262 } else { 1263 pm2 = NULL; /* panic - should not happen */ 1264 } 1265 1266 /* Put message last on queue */ 1267 1268 pm2->pm_num = up->up_msg_num; 1269 TAILQ_INSERT_TAIL(&up->up_qhead, pm2, pm_qentry); 1270 1271 return (pm2); 1272} 1273 1274/*------------------------------------------------------------------------* 1275 * usb_proc_is_gone 1276 * 1277 * Return values: 1278 * 0: USB process is running 1279 * Else: USB process is tearing down 1280 *------------------------------------------------------------------------*/ 1281uint8_t 1282usb_proc_is_gone(struct usb_process *up) 1283{ 1284 return (0); 1285} 1286 1287/*------------------------------------------------------------------------* 1288 * usb_proc_mwait 1289 * 1290 * This function will return when the USB process message pointed to 1291 * by "pm" is no longer on a queue. This function must be called 1292 * having "usb_proc_mtx" locked. 1293 *------------------------------------------------------------------------*/ 1294void 1295usb_proc_mwait(struct usb_process *up, void *_pm0, void *_pm1) 1296{ 1297 struct usb_proc_msg *pm0 = _pm0; 1298 struct usb_proc_msg *pm1 = _pm1; 1299 1300 /* Just remove the messages from the queue. */ 1301 if (pm0->pm_qentry.tqe_prev) { 1302 TAILQ_REMOVE(&up->up_qhead, pm0, pm_qentry); 1303 pm0->pm_qentry.tqe_prev = NULL; 1304 } 1305 if (pm1->pm_qentry.tqe_prev) { 1306 TAILQ_REMOVE(&up->up_qhead, pm1, pm_qentry); 1307 pm1->pm_qentry.tqe_prev = NULL; 1308 } 1309} 1310 1311/*------------------------------------------------------------------------* 1312 * SYSTEM attach 1313 *------------------------------------------------------------------------*/ 1314 1315#ifdef USB_PCI_PROBE_LIST 1316static device_method_t pci_methods[] = { 1317 DEVMETHOD_END 1318}; 1319 1320static driver_t pci_driver = { 1321 .name = "pci", 1322 .methods = pci_methods, 1323}; 1324 1325static devclass_t pci_devclass; 1326 1327DRIVER_MODULE(pci, pci, pci_driver, pci_devclass, 0, 0); 1328 1329static const char *usb_pci_devices[] = { 1330 USB_PCI_PROBE_LIST 1331}; 1332 1333#define USB_PCI_USB_MAX (sizeof(usb_pci_devices) / sizeof(void *)) 1334 1335static device_t usb_pci_dev[USB_PCI_USB_MAX]; 1336 1337static void 1338usb_pci_mod_load(void *arg) 1339{ 1340 uint32_t x; 1341 1342 usb_pci_root = device_add_child(NULL, "pci", -1); 1343 if (usb_pci_root == NULL) 1344 return; 1345 1346 for (x = 0; x != USB_PCI_USB_MAX; x++) { 1347 usb_pci_dev[x] = device_add_child(usb_pci_root, usb_pci_devices[x], -1); 1348 if (usb_pci_dev[x] == NULL) 1349 continue; 1350 if (device_probe_and_attach(usb_pci_dev[x])) { 1351 device_printf(usb_pci_dev[x], 1352 "WARNING: Probe and attach failed!\n"); 1353 } 1354 } 1355} 1356SYSINIT(usb_pci_mod_load, SI_SUB_RUN_SCHEDULER, SI_ORDER_MIDDLE, usb_pci_mod_load, 0); 1357 1358static void 1359usb_pci_mod_unload(void *arg) 1360{ 1361 uint32_t x; 1362 1363 for (x = 0; x != USB_PCI_USB_MAX; x++) { 1364 if (usb_pci_dev[x]) { 1365 device_detach(usb_pci_dev[x]); 1366 device_delete_child(usb_pci_root, usb_pci_dev[x]); 1367 } 1368 } 1369 if (usb_pci_root) 1370 device_delete_child(NULL, usb_pci_root); 1371} 1372SYSUNINIT(usb_pci_mod_unload, SI_SUB_RUN_SCHEDULER, SI_ORDER_MIDDLE, usb_pci_mod_unload, 0); 1373#endif 1374 1375/*------------------------------------------------------------------------* 1376 * MALLOC API 1377 *------------------------------------------------------------------------*/ 1378 1379#ifndef HAVE_MALLOC 1380#define USB_POOL_ALIGN 8 1381 1382static uint8_t usb_pool[USB_POOL_SIZE] __aligned(USB_POOL_ALIGN); 1383static uint32_t usb_pool_rem = USB_POOL_SIZE; 1384static uint32_t usb_pool_entries; 1385 1386struct malloc_hdr { 1387 TAILQ_ENTRY(malloc_hdr) entry; 1388 uint32_t size; 1389} __aligned(USB_POOL_ALIGN); 1390 1391static TAILQ_HEAD(, malloc_hdr) malloc_head = 1392 TAILQ_HEAD_INITIALIZER(malloc_head); 1393 1394void * 1395usb_malloc(unsigned long size) 1396{ 1397 struct malloc_hdr *hdr; 1398 1399 size = (size + USB_POOL_ALIGN - 1) & ~(USB_POOL_ALIGN - 1); 1400 size += sizeof(struct malloc_hdr); 1401 1402 TAILQ_FOREACH(hdr, &malloc_head, entry) { 1403 if (hdr->size == size) 1404 break; 1405 } 1406 1407 if (hdr) { 1408 DPRINTF("MALLOC: Entries = %d; Remainder = %d; Size = %d\n", 1409 (int)usb_pool_entries, (int)usb_pool_rem, (int)size); 1410 1411 TAILQ_REMOVE(&malloc_head, hdr, entry); 1412 memset(hdr + 1, 0, hdr->size - sizeof(*hdr)); 1413 return (hdr + 1); 1414 } 1415 if (usb_pool_rem >= size) { 1416 hdr = (void *)(usb_pool + USB_POOL_SIZE - usb_pool_rem); 1417 hdr->size = size; 1418 1419 usb_pool_rem -= size; 1420 usb_pool_entries++; 1421 1422 DPRINTF("MALLOC: Entries = %d; Remainder = %d; Size = %d\n", 1423 (int)usb_pool_entries, (int)usb_pool_rem, (int)size); 1424 1425 memset(hdr + 1, 0, hdr->size - sizeof(*hdr)); 1426 return (hdr + 1); 1427 } 1428 return (NULL); 1429} 1430 1431void 1432usb_free(void *arg) 1433{ 1434 struct malloc_hdr *hdr; 1435 1436 if (arg == NULL) 1437 return; 1438 1439 hdr = arg; 1440 hdr--; 1441 1442 TAILQ_INSERT_TAIL(&malloc_head, hdr, entry); 1443} 1444#endif 1445 1446char * 1447usb_strdup(const char *str) 1448{ 1449 char *tmp; 1450 int len; 1451 1452 len = 1 + strlen(str); 1453 1454 tmp = malloc(len,XXX,XXX); 1455 if (tmp == NULL) 1456 return (NULL); 1457 1458 memcpy(tmp, str, len); 1459 return (tmp); 1460} 1461