1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * This code implements a `root nexus' for Intel Architecture 35 * machines. The function of the root nexus is to serve as an 36 * attachment point for both processors and buses, and to manage 37 * resources which are common to all of them. In particular, 38 * this code implements the core resource managers for interrupt 39 * requests, DMA requests (which rightfully should be a part of the 40 * ISA code but it's easier to do it here for now), I/O port addresses, 41 * and I/O memory address space. 42 */ 43 44 #ifdef __amd64__ 45 #define DEV_APIC 46 #else 47 #include "opt_apic.h" 48 #endif 49 #include "opt_isa.h" 50 #include "opt_pci.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/bus.h> 55 #include <sys/kernel.h> 56 #include <sys/linker.h> 57 #include <sys/malloc.h> 58 #include <sys/module.h> 59 #include <machine/bus.h> 60 #include <machine/intr_machdep.h> 61 #include <sys/rman.h> 62 #include <sys/interrupt.h> 63 64 #include <machine/md_var.h> 65 #include <vm/vm.h> 66 #include <vm/vm_param.h> 67 #include <vm/vm_page.h> 68 #include <vm/vm_phys.h> 69 #include <vm/vm_dumpset.h> 70 #include <vm/pmap.h> 71 72 #include <machine/metadata.h> 73 #include <machine/nexusvar.h> 74 #include <machine/resource.h> 75 #include <machine/pc/bios.h> 76 77 #ifdef DEV_APIC 78 #include "pcib_if.h" 79 #endif 80 81 #ifdef DEV_ISA 82 #include <isa/isavar.h> 83 #include <isa/isareg.h> 84 #endif 85 #include <sys/rtprio.h> 86 87 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel") 88 89 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 90 91 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 92 93 struct rman irq_rman, drq_rman, port_rman, mem_rman; 94 95 static int nexus_probe(device_t); 96 static int nexus_attach(device_t); 97 static int nexus_print_all_resources(device_t dev); 98 static int nexus_print_child(device_t, device_t); 99 static device_t nexus_add_child(device_t bus, u_int order, const char *name, 100 int unit); 101 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 102 rman_res_t, rman_res_t, rman_res_t, 103 u_int); 104 static int nexus_adjust_resource(device_t, device_t, int, struct resource *, 105 rman_res_t, rman_res_t); 106 #ifdef SMP 107 static int nexus_bind_intr(device_t, device_t, struct resource *, int); 108 #endif 109 static int nexus_config_intr(device_t, int, enum intr_trigger, 110 enum intr_polarity); 111 static int nexus_describe_intr(device_t dev, device_t child, 112 struct resource *irq, void *cookie, 113 const char *descr); 114 static int nexus_activate_resource(device_t, device_t, int, int, 115 struct resource *); 116 static int nexus_deactivate_resource(device_t, device_t, int, int, 117 struct resource *); 118 static int nexus_map_resource(device_t bus, device_t child, int type, 119 struct resource *r, 120 struct resource_map_request *argsp, 121 struct resource_map *map); 122 static int nexus_unmap_resource(device_t bus, device_t child, int type, 123 struct resource *r, struct resource_map *map); 124 static int nexus_release_resource(device_t, device_t, int, int, 125 struct resource *); 126 static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 127 driver_filter_t filter, void (*)(void *), void *, 128 void **); 129 static int nexus_teardown_intr(device_t, device_t, struct resource *, 130 void *); 131 static int nexus_suspend_intr(device_t, device_t, struct resource *); 132 static int nexus_resume_intr(device_t, device_t, struct resource *); 133 static struct resource_list *nexus_get_reslist(device_t dev, device_t child); 134 static int nexus_set_resource(device_t, device_t, int, int, 135 rman_res_t, rman_res_t); 136 static int nexus_get_resource(device_t, device_t, int, int, 137 rman_res_t *, rman_res_t *); 138 static void nexus_delete_resource(device_t, device_t, int, int); 139 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t, 140 cpuset_t *); 141 #if defined(DEV_APIC) && defined(DEV_PCI) 142 static int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs); 143 static int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs); 144 static int nexus_alloc_msix(device_t pcib, device_t dev, int *irq); 145 static int nexus_release_msix(device_t pcib, device_t dev, int irq); 146 static int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data); 147 #endif 148 149 static device_method_t nexus_methods[] = { 150 /* Device interface */ 151 DEVMETHOD(device_probe, nexus_probe), 152 DEVMETHOD(device_attach, nexus_attach), 153 DEVMETHOD(device_detach, bus_generic_detach), 154 DEVMETHOD(device_shutdown, bus_generic_shutdown), 155 DEVMETHOD(device_suspend, bus_generic_suspend), 156 DEVMETHOD(device_resume, bus_generic_resume), 157 158 /* Bus interface */ 159 DEVMETHOD(bus_print_child, nexus_print_child), 160 DEVMETHOD(bus_add_child, nexus_add_child), 161 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 162 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource), 163 DEVMETHOD(bus_release_resource, nexus_release_resource), 164 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 165 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 166 DEVMETHOD(bus_map_resource, nexus_map_resource), 167 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource), 168 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 169 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 170 DEVMETHOD(bus_suspend_intr, nexus_suspend_intr), 171 DEVMETHOD(bus_resume_intr, nexus_resume_intr), 172 #ifdef SMP 173 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 174 #endif 175 DEVMETHOD(bus_config_intr, nexus_config_intr), 176 DEVMETHOD(bus_describe_intr, nexus_describe_intr), 177 DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 178 DEVMETHOD(bus_set_resource, nexus_set_resource), 179 DEVMETHOD(bus_get_resource, nexus_get_resource), 180 DEVMETHOD(bus_delete_resource, nexus_delete_resource), 181 DEVMETHOD(bus_get_cpus, nexus_get_cpus), 182 183 /* pcib interface */ 184 #if defined(DEV_APIC) && defined(DEV_PCI) 185 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi), 186 DEVMETHOD(pcib_release_msi, nexus_release_msi), 187 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix), 188 DEVMETHOD(pcib_release_msix, nexus_release_msix), 189 DEVMETHOD(pcib_map_msi, nexus_map_msi), 190 #endif 191 { 0, 0 } 192 }; 193 194 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 195 196 DRIVER_MODULE(nexus, root, nexus_driver, 0, 0); 197 198 static int 199 nexus_probe(device_t dev) 200 { 201 202 device_quiet(dev); /* suppress attach message for neatness */ 203 return (BUS_PROBE_GENERIC); 204 } 205 206 void 207 nexus_init_resources(void) 208 { 209 int irq; 210 211 /* 212 * XXX working notes: 213 * 214 * - IRQ resource creation should be moved to the PIC/APIC driver. 215 * - DRQ resource creation should be moved to the DMAC driver. 216 * - The above should be sorted to probe earlier than any child buses. 217 * 218 * - Leave I/O and memory creation here, as child probes may need them. 219 * (especially eg. ACPI) 220 */ 221 222 /* 223 * IRQ's are on the mainboard on old systems, but on the ISA part 224 * of PCI->ISA bridges. There would be multiple sets of IRQs on 225 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 226 * component, so in a way, PCI can be a partial child of an ISA bus(!). 227 * APIC interrupts are global though. 228 */ 229 irq_rman.rm_start = 0; 230 irq_rman.rm_type = RMAN_ARRAY; 231 irq_rman.rm_descr = "Interrupt request lines"; 232 irq_rman.rm_end = num_io_irqs - 1; 233 if (rman_init(&irq_rman)) 234 panic("nexus_init_resources irq_rman"); 235 236 /* 237 * We search for regions of existing IRQs and add those to the IRQ 238 * resource manager. 239 */ 240 for (irq = 0; irq < num_io_irqs; irq++) 241 if (intr_lookup_source(irq) != NULL) 242 if (rman_manage_region(&irq_rman, irq, irq) != 0) 243 panic("nexus_init_resources irq_rman add"); 244 245 /* 246 * ISA DMA on PCI systems is implemented in the ISA part of each 247 * PCI->ISA bridge and the channels can be duplicated if there are 248 * multiple bridges. (eg: laptops with docking stations) 249 */ 250 drq_rman.rm_start = 0; 251 drq_rman.rm_end = 7; 252 drq_rman.rm_type = RMAN_ARRAY; 253 drq_rman.rm_descr = "DMA request lines"; 254 /* XXX drq 0 not available on some machines */ 255 if (rman_init(&drq_rman) 256 || rman_manage_region(&drq_rman, 257 drq_rman.rm_start, drq_rman.rm_end)) 258 panic("nexus_init_resources drq_rman"); 259 260 /* 261 * However, IO ports and Memory truely are global at this level, 262 * as are APIC interrupts (however many IO APICS there turn out 263 * to be on large systems..) 264 */ 265 port_rman.rm_start = 0; 266 port_rman.rm_end = 0xffff; 267 port_rman.rm_type = RMAN_ARRAY; 268 port_rman.rm_descr = "I/O ports"; 269 if (rman_init(&port_rman) 270 || rman_manage_region(&port_rman, 0, 0xffff)) 271 panic("nexus_init_resources port_rman"); 272 273 mem_rman.rm_start = 0; 274 mem_rman.rm_end = cpu_getmaxphyaddr(); 275 mem_rman.rm_type = RMAN_ARRAY; 276 mem_rman.rm_descr = "I/O memory addresses"; 277 if (rman_init(&mem_rman) 278 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end)) 279 panic("nexus_init_resources mem_rman"); 280 } 281 282 static int 283 nexus_attach(device_t dev) 284 { 285 286 nexus_init_resources(); 287 bus_generic_probe(dev); 288 289 /* 290 * Explicitly add the legacy0 device here. Other platform 291 * types (such as ACPI), use their own nexus(4) subclass 292 * driver to override this routine and add their own root bus. 293 */ 294 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL) 295 panic("legacy: could not attach"); 296 bus_generic_attach(dev); 297 return 0; 298 } 299 300 static int 301 nexus_print_all_resources(device_t dev) 302 { 303 struct nexus_device *ndev = DEVTONX(dev); 304 struct resource_list *rl = &ndev->nx_resources; 305 int retval = 0; 306 307 if (STAILQ_FIRST(rl)) 308 retval += printf(" at"); 309 310 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 311 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 312 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 313 314 return retval; 315 } 316 317 static int 318 nexus_print_child(device_t bus, device_t child) 319 { 320 int retval = 0; 321 322 retval += bus_print_child_header(bus, child); 323 retval += nexus_print_all_resources(child); 324 if (device_get_flags(child)) 325 retval += printf(" flags %#x", device_get_flags(child)); 326 retval += printf("\n"); 327 328 return (retval); 329 } 330 331 static device_t 332 nexus_add_child(device_t bus, u_int order, const char *name, int unit) 333 { 334 device_t child; 335 struct nexus_device *ndev; 336 337 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 338 if (!ndev) 339 return(0); 340 resource_list_init(&ndev->nx_resources); 341 342 child = device_add_child_ordered(bus, order, name, unit); 343 344 /* should we free this in nexus_child_detached? */ 345 device_set_ivars(child, ndev); 346 347 return(child); 348 } 349 350 static struct rman * 351 nexus_rman(int type) 352 { 353 switch (type) { 354 case SYS_RES_IRQ: 355 return (&irq_rman); 356 case SYS_RES_DRQ: 357 return (&drq_rman); 358 case SYS_RES_IOPORT: 359 return (&port_rman); 360 case SYS_RES_MEMORY: 361 return (&mem_rman); 362 default: 363 return (NULL); 364 } 365 } 366 367 /* 368 * Allocate a resource on behalf of child. NB: child is usually going to be a 369 * child of one of our descendants, not a direct child of nexus0. 370 * (Exceptions include npx.) 371 */ 372 static struct resource * 373 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 374 rman_res_t start, rman_res_t end, rman_res_t count, 375 u_int flags) 376 { 377 struct nexus_device *ndev = DEVTONX(child); 378 struct resource *rv; 379 struct resource_list_entry *rle; 380 struct rman *rm; 381 int needactivate = flags & RF_ACTIVE; 382 383 /* 384 * If this is an allocation of the "default" range for a given 385 * RID, and we know what the resources for this device are 386 * (ie. they aren't maintained by a child bus), then work out 387 * the start/end values. 388 */ 389 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { 390 if (device_get_parent(child) != bus || ndev == NULL) 391 return(NULL); 392 rle = resource_list_find(&ndev->nx_resources, type, *rid); 393 if (rle == NULL) 394 return(NULL); 395 start = rle->start; 396 end = rle->end; 397 count = rle->count; 398 } 399 400 flags &= ~RF_ACTIVE; 401 rm = nexus_rman(type); 402 if (rm == NULL) 403 return (NULL); 404 405 rv = rman_reserve_resource(rm, start, end, count, flags, child); 406 if (rv == NULL) 407 return 0; 408 rman_set_rid(rv, *rid); 409 410 if (needactivate) { 411 if (bus_activate_resource(child, type, *rid, rv)) { 412 rman_release_resource(rv); 413 return 0; 414 } 415 } 416 417 return rv; 418 } 419 420 static int 421 nexus_adjust_resource(device_t bus, device_t child, int type, 422 struct resource *r, rman_res_t start, rman_res_t end) 423 { 424 struct rman *rm; 425 426 rm = nexus_rman(type); 427 if (rm == NULL) 428 return (ENXIO); 429 if (!rman_is_region_manager(r, rm)) 430 return (EINVAL); 431 return (rman_adjust_resource(r, start, end)); 432 } 433 434 static int 435 nexus_activate_resource(device_t bus, device_t child, int type, int rid, 436 struct resource *r) 437 { 438 struct resource_map map; 439 int error; 440 441 error = rman_activate_resource(r); 442 if (error != 0) 443 return (error); 444 445 if (!(rman_get_flags(r) & RF_UNMAPPED) && 446 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 447 error = nexus_map_resource(bus, child, type, r, NULL, &map); 448 if (error) { 449 rman_deactivate_resource(r); 450 return (error); 451 } 452 453 rman_set_mapping(r,&map); 454 } 455 return (0); 456 } 457 458 static int 459 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 460 struct resource *r) 461 { 462 struct resource_map map; 463 int error; 464 465 error = rman_deactivate_resource(r); 466 if (error) 467 return (error); 468 469 if (!(rman_get_flags(r) & RF_UNMAPPED) && 470 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 471 rman_get_mapping(r, &map); 472 nexus_unmap_resource(bus, child, type, r, &map); 473 } 474 return (0); 475 } 476 477 static int 478 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, 479 struct resource_map_request *argsp, struct resource_map *map) 480 { 481 struct resource_map_request args; 482 rman_res_t end, length, start; 483 484 /* Resources must be active to be mapped. */ 485 if (!(rman_get_flags(r) & RF_ACTIVE)) 486 return (ENXIO); 487 488 /* Mappings are only supported on I/O and memory resources. */ 489 switch (type) { 490 case SYS_RES_IOPORT: 491 case SYS_RES_MEMORY: 492 break; 493 default: 494 return (EINVAL); 495 } 496 497 resource_init_map_request(&args); 498 if (argsp != NULL) 499 bcopy(argsp, &args, imin(argsp->size, args.size)); 500 start = rman_get_start(r) + args.offset; 501 if (args.length == 0) 502 length = rman_get_size(r); 503 else 504 length = args.length; 505 end = start + length - 1; 506 if (start > rman_get_end(r) || start < rman_get_start(r)) 507 return (EINVAL); 508 if (end > rman_get_end(r) || end < start) 509 return (EINVAL); 510 511 /* 512 * If this is a memory resource, map it into the kernel. 513 */ 514 switch (type) { 515 case SYS_RES_IOPORT: 516 map->r_bushandle = start; 517 map->r_bustag = X86_BUS_SPACE_IO; 518 map->r_size = length; 519 map->r_vaddr = NULL; 520 break; 521 case SYS_RES_MEMORY: 522 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 523 map->r_bustag = X86_BUS_SPACE_MEM; 524 map->r_size = length; 525 526 /* 527 * The handle is the virtual address. 528 */ 529 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 530 break; 531 } 532 return (0); 533 } 534 535 static int 536 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r, 537 struct resource_map *map) 538 { 539 540 /* 541 * If this is a memory resource, unmap it. 542 */ 543 switch (type) { 544 case SYS_RES_MEMORY: 545 pmap_unmapdev(map->r_vaddr, map->r_size); 546 /* FALLTHROUGH */ 547 case SYS_RES_IOPORT: 548 break; 549 default: 550 return (EINVAL); 551 } 552 return (0); 553 } 554 555 static int 556 nexus_release_resource(device_t bus, device_t child, int type, int rid, 557 struct resource *r) 558 { 559 560 if (rman_get_flags(r) & RF_ACTIVE) { 561 int error = bus_deactivate_resource(child, type, rid, r); 562 if (error) 563 return error; 564 } 565 return (rman_release_resource(r)); 566 } 567 568 /* 569 * Currently this uses the really grody interface from kern/kern_intr.c 570 * (which really doesn't belong in kern/anything.c). Eventually, all of 571 * the code in kern_intr.c and machdep_intr.c should get moved here, since 572 * this is going to be the official interface. 573 */ 574 static int 575 nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 576 int flags, driver_filter_t filter, void (*ihand)(void *), 577 void *arg, void **cookiep) 578 { 579 int error, domain; 580 581 /* somebody tried to setup an irq that failed to allocate! */ 582 if (irq == NULL) 583 panic("nexus_setup_intr: NULL irq resource!"); 584 585 *cookiep = NULL; 586 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 587 flags |= INTR_EXCL; 588 589 /* 590 * We depend here on rman_activate_resource() being idempotent. 591 */ 592 error = rman_activate_resource(irq); 593 if (error) 594 return (error); 595 if (bus_get_domain(child, &domain) != 0) 596 domain = 0; 597 598 error = intr_add_handler(device_get_nameunit(child), 599 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain); 600 if (error == 0) 601 rman_set_irq_cookie(irq, *cookiep); 602 603 return (error); 604 } 605 606 static int 607 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 608 { 609 int error; 610 611 error = intr_remove_handler(ih); 612 if (error == 0) 613 rman_set_irq_cookie(r, NULL); 614 return (error); 615 } 616 617 static int 618 nexus_suspend_intr(device_t dev, device_t child, struct resource *irq) 619 { 620 return (intr_event_suspend_handler(rman_get_irq_cookie(irq))); 621 } 622 623 static int 624 nexus_resume_intr(device_t dev, device_t child, struct resource *irq) 625 { 626 return (intr_event_resume_handler(rman_get_irq_cookie(irq))); 627 } 628 629 #ifdef SMP 630 static int 631 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 632 { 633 return (intr_bind(rman_get_start(irq), cpu)); 634 } 635 #endif 636 637 static int 638 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 639 enum intr_polarity pol) 640 { 641 return (intr_config_intr(irq, trig, pol)); 642 } 643 644 static int 645 nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 646 void *cookie, const char *descr) 647 { 648 649 return (intr_describe(rman_get_start(irq), cookie, descr)); 650 } 651 652 static struct resource_list * 653 nexus_get_reslist(device_t dev, device_t child) 654 { 655 struct nexus_device *ndev = DEVTONX(child); 656 657 return (&ndev->nx_resources); 658 } 659 660 static int 661 nexus_set_resource(device_t dev, device_t child, int type, int rid, 662 rman_res_t start, rman_res_t count) 663 { 664 struct nexus_device *ndev = DEVTONX(child); 665 struct resource_list *rl = &ndev->nx_resources; 666 667 /* XXX this should return a success/failure indicator */ 668 resource_list_add(rl, type, rid, start, start + count - 1, count); 669 return(0); 670 } 671 672 static int 673 nexus_get_resource(device_t dev, device_t child, int type, int rid, 674 rman_res_t *startp, rman_res_t *countp) 675 { 676 struct nexus_device *ndev = DEVTONX(child); 677 struct resource_list *rl = &ndev->nx_resources; 678 struct resource_list_entry *rle; 679 680 rle = resource_list_find(rl, type, rid); 681 if (!rle) 682 return(ENOENT); 683 if (startp) 684 *startp = rle->start; 685 if (countp) 686 *countp = rle->count; 687 return(0); 688 } 689 690 static void 691 nexus_delete_resource(device_t dev, device_t child, int type, int rid) 692 { 693 struct nexus_device *ndev = DEVTONX(child); 694 struct resource_list *rl = &ndev->nx_resources; 695 696 resource_list_delete(rl, type, rid); 697 } 698 699 static int 700 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 701 cpuset_t *cpuset) 702 { 703 704 switch (op) { 705 #ifdef SMP 706 case INTR_CPUS: 707 if (setsize != sizeof(cpuset_t)) 708 return (EINVAL); 709 *cpuset = intr_cpus; 710 return (0); 711 #endif 712 default: 713 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 714 } 715 } 716 717 /* Called from the MSI code to add new IRQs to the IRQ rman. */ 718 void 719 nexus_add_irq(u_long irq) 720 { 721 722 if (rman_manage_region(&irq_rman, irq, irq) != 0) 723 panic("%s: failed", __func__); 724 } 725 726 #if defined(DEV_APIC) && defined(DEV_PCI) 727 static int 728 nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 729 { 730 731 return (msix_alloc(dev, irq)); 732 } 733 734 static int 735 nexus_release_msix(device_t pcib, device_t dev, int irq) 736 { 737 738 return (msix_release(irq)); 739 } 740 741 static int 742 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 743 { 744 745 return (msi_alloc(dev, count, maxcount, irqs)); 746 } 747 748 static int 749 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 750 { 751 752 return (msi_release(irqs, count)); 753 } 754 755 static int 756 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 757 { 758 759 return (msi_map(irq, addr, data)); 760 } 761 #endif /* DEV_APIC && DEV_PCI */ 762 763 /* Placeholder for system RAM. */ 764 static void 765 ram_identify(driver_t *driver, device_t parent) 766 { 767 768 if (resource_disabled("ram", 0)) 769 return; 770 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 771 panic("ram_identify"); 772 } 773 774 static int 775 ram_probe(device_t dev) 776 { 777 778 device_quiet(dev); 779 device_set_desc(dev, "System RAM"); 780 return (0); 781 } 782 783 static int 784 ram_attach(device_t dev) 785 { 786 struct bios_smap *smapbase, *smap, *smapend; 787 struct resource *res; 788 rman_res_t length; 789 vm_paddr_t *p; 790 caddr_t kmdp; 791 uint32_t smapsize; 792 int error, rid; 793 794 /* Retrieve the system memory map from the loader. */ 795 kmdp = preload_search_by_type("elf kernel"); 796 if (kmdp == NULL) 797 kmdp = preload_search_by_type(ELF_KERN_STR); 798 smapbase = (struct bios_smap *)preload_search_info(kmdp, 799 MODINFO_METADATA | MODINFOMD_SMAP); 800 if (smapbase != NULL) { 801 smapsize = *((u_int32_t *)smapbase - 1); 802 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 803 804 rid = 0; 805 for (smap = smapbase; smap < smapend; smap++) { 806 if (smap->type != SMAP_TYPE_MEMORY || 807 smap->length == 0) 808 continue; 809 if (smap->base > mem_rman.rm_end) 810 continue; 811 length = smap->base + smap->length > mem_rman.rm_end ? 812 mem_rman.rm_end - smap->base : smap->length; 813 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 814 smap->base, length); 815 if (error) 816 panic( 817 "ram_attach: resource %d failed set with %d", 818 rid, error); 819 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 820 0); 821 if (res == NULL) 822 panic("ram_attach: resource %d failed to attach", 823 rid); 824 rid++; 825 } 826 return (0); 827 } 828 829 /* 830 * If the system map is not available, fall back to using 831 * dump_avail[]. We use the dump_avail[] array rather than 832 * phys_avail[] for the memory map as phys_avail[] contains 833 * holes for kernel memory, page 0, the message buffer, and 834 * the dcons buffer. We test the end address in the loop 835 * instead of the start since the start address for the first 836 * segment is 0. 837 */ 838 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 839 if (p[0] > mem_rman.rm_end) 840 break; 841 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) - 842 p[0]; 843 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 844 length); 845 if (error) 846 panic("ram_attach: resource %d failed set with %d", rid, 847 error); 848 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 849 if (res == NULL) 850 panic("ram_attach: resource %d failed to attach", rid); 851 } 852 return (0); 853 } 854 855 static device_method_t ram_methods[] = { 856 /* Device interface */ 857 DEVMETHOD(device_identify, ram_identify), 858 DEVMETHOD(device_probe, ram_probe), 859 DEVMETHOD(device_attach, ram_attach), 860 { 0, 0 } 861 }; 862 863 static driver_t ram_driver = { 864 "ram", 865 ram_methods, 866 1, /* no softc */ 867 }; 868 869 DRIVER_MODULE(ram, nexus, ram_driver, 0, 0); 870 871 #ifdef DEV_ISA 872 /* 873 * Placeholder which claims PnP 'devices' which describe system 874 * resources. 875 */ 876 static struct isa_pnp_id sysresource_ids[] = { 877 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 878 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 879 { 0 } 880 }; 881 882 static int 883 sysresource_probe(device_t dev) 884 { 885 int result; 886 887 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 888 device_quiet(dev); 889 } 890 return(result); 891 } 892 893 static int 894 sysresource_attach(device_t dev) 895 { 896 return(0); 897 } 898 899 static device_method_t sysresource_methods[] = { 900 /* Device interface */ 901 DEVMETHOD(device_probe, sysresource_probe), 902 DEVMETHOD(device_attach, sysresource_attach), 903 DEVMETHOD(device_detach, bus_generic_detach), 904 DEVMETHOD(device_shutdown, bus_generic_shutdown), 905 DEVMETHOD(device_suspend, bus_generic_suspend), 906 DEVMETHOD(device_resume, bus_generic_resume), 907 { 0, 0 } 908 }; 909 910 static driver_t sysresource_driver = { 911 "sysresource", 912 sysresource_methods, 913 1, /* no softc */ 914 }; 915 916 DRIVER_MODULE(sysresource, isa, sysresource_driver, 0, 0); 917 ISA_PNP_INFO(sysresource_ids); 918 #endif /* DEV_ISA */ 919