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/vmparam.h> 65 #include <vm/vm.h> 66 #include <vm/pmap.h> 67 68 #include <machine/metadata.h> 69 #include <machine/nexusvar.h> 70 #include <machine/resource.h> 71 #include <machine/pc/bios.h> 72 73 #ifdef DEV_APIC 74 #include "pcib_if.h" 75 #endif 76 77 #ifdef DEV_ISA 78 #include <isa/isavar.h> 79 #include <isa/isareg.h> 80 #endif 81 #include <sys/rtprio.h> 82 83 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel") 84 85 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 86 87 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 88 89 struct rman irq_rman, drq_rman, port_rman, mem_rman; 90 91 static int nexus_probe(device_t); 92 static int nexus_attach(device_t); 93 static int nexus_print_all_resources(device_t dev); 94 static int nexus_print_child(device_t, device_t); 95 static device_t nexus_add_child(device_t bus, u_int order, const char *name, 96 int unit); 97 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 98 rman_res_t, rman_res_t, rman_res_t, 99 u_int); 100 static int nexus_adjust_resource(device_t, device_t, int, struct resource *, 101 rman_res_t, rman_res_t); 102 #ifdef SMP 103 static int nexus_bind_intr(device_t, device_t, struct resource *, int); 104 #endif 105 static int nexus_config_intr(device_t, int, enum intr_trigger, 106 enum intr_polarity); 107 static int nexus_describe_intr(device_t dev, device_t child, 108 struct resource *irq, void *cookie, 109 const char *descr); 110 static int nexus_activate_resource(device_t, device_t, int, int, 111 struct resource *); 112 static int nexus_deactivate_resource(device_t, device_t, int, int, 113 struct resource *); 114 static int nexus_map_resource(device_t bus, device_t child, int type, 115 struct resource *r, 116 struct resource_map_request *argsp, 117 struct resource_map *map); 118 static int nexus_unmap_resource(device_t bus, device_t child, int type, 119 struct resource *r, struct resource_map *map); 120 static int nexus_release_resource(device_t, device_t, int, int, 121 struct resource *); 122 static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 123 driver_filter_t filter, void (*)(void *), void *, 124 void **); 125 static int nexus_teardown_intr(device_t, device_t, struct resource *, 126 void *); 127 static struct resource_list *nexus_get_reslist(device_t dev, device_t child); 128 static int nexus_set_resource(device_t, device_t, int, int, 129 rman_res_t, rman_res_t); 130 static int nexus_get_resource(device_t, device_t, int, int, 131 rman_res_t *, rman_res_t *); 132 static void nexus_delete_resource(device_t, device_t, int, int); 133 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t, 134 cpuset_t *); 135 #if defined(DEV_APIC) && defined(DEV_PCI) 136 static int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs); 137 static int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs); 138 static int nexus_alloc_msix(device_t pcib, device_t dev, int *irq); 139 static int nexus_release_msix(device_t pcib, device_t dev, int irq); 140 static int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data); 141 #endif 142 143 static device_method_t nexus_methods[] = { 144 /* Device interface */ 145 DEVMETHOD(device_probe, nexus_probe), 146 DEVMETHOD(device_attach, nexus_attach), 147 DEVMETHOD(device_detach, bus_generic_detach), 148 DEVMETHOD(device_shutdown, bus_generic_shutdown), 149 DEVMETHOD(device_suspend, bus_generic_suspend), 150 DEVMETHOD(device_resume, bus_generic_resume), 151 152 /* Bus interface */ 153 DEVMETHOD(bus_print_child, nexus_print_child), 154 DEVMETHOD(bus_add_child, nexus_add_child), 155 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 156 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource), 157 DEVMETHOD(bus_release_resource, nexus_release_resource), 158 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 159 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 160 DEVMETHOD(bus_map_resource, nexus_map_resource), 161 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource), 162 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 163 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 164 #ifdef SMP 165 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 166 #endif 167 DEVMETHOD(bus_config_intr, nexus_config_intr), 168 DEVMETHOD(bus_describe_intr, nexus_describe_intr), 169 DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 170 DEVMETHOD(bus_set_resource, nexus_set_resource), 171 DEVMETHOD(bus_get_resource, nexus_get_resource), 172 DEVMETHOD(bus_delete_resource, nexus_delete_resource), 173 DEVMETHOD(bus_get_cpus, nexus_get_cpus), 174 175 /* pcib interface */ 176 #if defined(DEV_APIC) && defined(DEV_PCI) 177 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi), 178 DEVMETHOD(pcib_release_msi, nexus_release_msi), 179 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix), 180 DEVMETHOD(pcib_release_msix, nexus_release_msix), 181 DEVMETHOD(pcib_map_msi, nexus_map_msi), 182 #endif 183 184 { 0, 0 } 185 }; 186 187 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 188 static devclass_t nexus_devclass; 189 190 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 191 192 static int 193 nexus_probe(device_t dev) 194 { 195 196 device_quiet(dev); /* suppress attach message for neatness */ 197 return (BUS_PROBE_GENERIC); 198 } 199 200 void 201 nexus_init_resources(void) 202 { 203 int irq; 204 205 /* 206 * XXX working notes: 207 * 208 * - IRQ resource creation should be moved to the PIC/APIC driver. 209 * - DRQ resource creation should be moved to the DMAC driver. 210 * - The above should be sorted to probe earlier than any child buses. 211 * 212 * - Leave I/O and memory creation here, as child probes may need them. 213 * (especially eg. ACPI) 214 */ 215 216 /* 217 * IRQ's are on the mainboard on old systems, but on the ISA part 218 * of PCI->ISA bridges. There would be multiple sets of IRQs on 219 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 220 * component, so in a way, PCI can be a partial child of an ISA bus(!). 221 * APIC interrupts are global though. 222 */ 223 irq_rman.rm_start = 0; 224 irq_rman.rm_type = RMAN_ARRAY; 225 irq_rman.rm_descr = "Interrupt request lines"; 226 irq_rman.rm_end = num_io_irqs - 1; 227 if (rman_init(&irq_rman)) 228 panic("nexus_init_resources irq_rman"); 229 230 /* 231 * We search for regions of existing IRQs and add those to the IRQ 232 * resource manager. 233 */ 234 for (irq = 0; irq < num_io_irqs; irq++) 235 if (intr_lookup_source(irq) != NULL) 236 if (rman_manage_region(&irq_rman, irq, irq) != 0) 237 panic("nexus_init_resources irq_rman add"); 238 239 /* 240 * ISA DMA on PCI systems is implemented in the ISA part of each 241 * PCI->ISA bridge and the channels can be duplicated if there are 242 * multiple bridges. (eg: laptops with docking stations) 243 */ 244 drq_rman.rm_start = 0; 245 drq_rman.rm_end = 7; 246 drq_rman.rm_type = RMAN_ARRAY; 247 drq_rman.rm_descr = "DMA request lines"; 248 /* XXX drq 0 not available on some machines */ 249 if (rman_init(&drq_rman) 250 || rman_manage_region(&drq_rman, 251 drq_rman.rm_start, drq_rman.rm_end)) 252 panic("nexus_init_resources drq_rman"); 253 254 /* 255 * However, IO ports and Memory truely are global at this level, 256 * as are APIC interrupts (however many IO APICS there turn out 257 * to be on large systems..) 258 */ 259 port_rman.rm_start = 0; 260 port_rman.rm_end = 0xffff; 261 port_rman.rm_type = RMAN_ARRAY; 262 port_rman.rm_descr = "I/O ports"; 263 if (rman_init(&port_rman) 264 || rman_manage_region(&port_rman, 0, 0xffff)) 265 panic("nexus_init_resources port_rman"); 266 267 mem_rman.rm_start = 0; 268 #ifndef PAE 269 mem_rman.rm_end = BUS_SPACE_MAXADDR; 270 #else 271 mem_rman.rm_end = ((1ULL << cpu_maxphyaddr) - 1); 272 #endif 273 mem_rman.rm_type = RMAN_ARRAY; 274 mem_rman.rm_descr = "I/O memory addresses"; 275 if (rman_init(&mem_rman) 276 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end)) 277 panic("nexus_init_resources mem_rman"); 278 } 279 280 static int 281 nexus_attach(device_t dev) 282 { 283 284 nexus_init_resources(); 285 bus_generic_probe(dev); 286 287 /* 288 * Explicitly add the legacy0 device here. Other platform 289 * types (such as ACPI), use their own nexus(4) subclass 290 * driver to override this routine and add their own root bus. 291 */ 292 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL) 293 panic("legacy: could not attach"); 294 bus_generic_attach(dev); 295 return 0; 296 } 297 298 static int 299 nexus_print_all_resources(device_t dev) 300 { 301 struct nexus_device *ndev = DEVTONX(dev); 302 struct resource_list *rl = &ndev->nx_resources; 303 int retval = 0; 304 305 if (STAILQ_FIRST(rl)) 306 retval += printf(" at"); 307 308 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 309 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 310 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 311 312 return retval; 313 } 314 315 static int 316 nexus_print_child(device_t bus, device_t child) 317 { 318 int retval = 0; 319 320 retval += bus_print_child_header(bus, child); 321 retval += nexus_print_all_resources(child); 322 if (device_get_flags(child)) 323 retval += printf(" flags %#x", device_get_flags(child)); 324 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 325 326 return (retval); 327 } 328 329 static device_t 330 nexus_add_child(device_t bus, u_int order, const char *name, int unit) 331 { 332 device_t child; 333 struct nexus_device *ndev; 334 335 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 336 if (!ndev) 337 return(0); 338 resource_list_init(&ndev->nx_resources); 339 340 child = device_add_child_ordered(bus, order, name, unit); 341 342 /* should we free this in nexus_child_detached? */ 343 device_set_ivars(child, ndev); 344 345 return(child); 346 } 347 348 static struct rman * 349 nexus_rman(int type) 350 { 351 switch (type) { 352 case SYS_RES_IRQ: 353 return (&irq_rman); 354 case SYS_RES_DRQ: 355 return (&drq_rman); 356 case SYS_RES_IOPORT: 357 return (&port_rman); 358 case SYS_RES_MEMORY: 359 return (&mem_rman); 360 default: 361 return (NULL); 362 } 363 } 364 365 /* 366 * Allocate a resource on behalf of child. NB: child is usually going to be a 367 * child of one of our descendants, not a direct child of nexus0. 368 * (Exceptions include npx.) 369 */ 370 static struct resource * 371 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 372 rman_res_t start, rman_res_t end, rman_res_t count, 373 u_int flags) 374 { 375 struct nexus_device *ndev = DEVTONX(child); 376 struct resource *rv; 377 struct resource_list_entry *rle; 378 struct rman *rm; 379 int needactivate = flags & RF_ACTIVE; 380 381 /* 382 * If this is an allocation of the "default" range for a given 383 * RID, and we know what the resources for this device are 384 * (ie. they aren't maintained by a child bus), then work out 385 * the start/end values. 386 */ 387 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { 388 if (device_get_parent(child) != bus || ndev == NULL) 389 return(NULL); 390 rle = resource_list_find(&ndev->nx_resources, type, *rid); 391 if (rle == NULL) 392 return(NULL); 393 start = rle->start; 394 end = rle->end; 395 count = rle->count; 396 } 397 398 flags &= ~RF_ACTIVE; 399 rm = nexus_rman(type); 400 if (rm == NULL) 401 return (NULL); 402 403 rv = rman_reserve_resource(rm, start, end, count, flags, child); 404 if (rv == NULL) 405 return 0; 406 rman_set_rid(rv, *rid); 407 408 if (needactivate) { 409 if (bus_activate_resource(child, type, *rid, rv)) { 410 rman_release_resource(rv); 411 return 0; 412 } 413 } 414 415 return rv; 416 } 417 418 static int 419 nexus_adjust_resource(device_t bus, device_t child, int type, 420 struct resource *r, rman_res_t start, rman_res_t end) 421 { 422 struct rman *rm; 423 424 rm = nexus_rman(type); 425 if (rm == NULL) 426 return (ENXIO); 427 if (!rman_is_region_manager(r, rm)) 428 return (EINVAL); 429 return (rman_adjust_resource(r, start, end)); 430 } 431 432 static int 433 nexus_activate_resource(device_t bus, device_t child, int type, int rid, 434 struct resource *r) 435 { 436 struct resource_map map; 437 int error; 438 439 error = rman_activate_resource(r); 440 if (error != 0) 441 return (error); 442 443 if (!(rman_get_flags(r) & RF_UNMAPPED) && 444 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 445 error = nexus_map_resource(bus, child, type, r, NULL, &map); 446 if (error) { 447 rman_deactivate_resource(r); 448 return (error); 449 } 450 451 rman_set_mapping(r,&map); 452 } 453 return (0); 454 } 455 456 static int 457 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 458 struct resource *r) 459 { 460 struct resource_map map; 461 int error; 462 463 error = rman_deactivate_resource(r); 464 if (error) 465 return (error); 466 467 if (!(rman_get_flags(r) & RF_UNMAPPED) && 468 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 469 rman_get_mapping(r, &map); 470 nexus_unmap_resource(bus, child, type, r, &map); 471 } 472 return (0); 473 } 474 475 static int 476 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, 477 struct resource_map_request *argsp, struct resource_map *map) 478 { 479 struct resource_map_request args; 480 rman_res_t end, length, start; 481 482 /* Resources must be active to be mapped. */ 483 if (!(rman_get_flags(r) & RF_ACTIVE)) 484 return (ENXIO); 485 486 /* Mappings are only supported on I/O and memory resources. */ 487 switch (type) { 488 case SYS_RES_IOPORT: 489 case SYS_RES_MEMORY: 490 break; 491 default: 492 return (EINVAL); 493 } 494 495 resource_init_map_request(&args); 496 if (argsp != NULL) 497 bcopy(argsp, &args, imin(argsp->size, args.size)); 498 start = rman_get_start(r) + args.offset; 499 if (args.length == 0) 500 length = rman_get_size(r); 501 else 502 length = args.length; 503 end = start + length - 1; 504 if (start > rman_get_end(r) || start < rman_get_start(r)) 505 return (EINVAL); 506 if (end > rman_get_end(r) || end < start) 507 return (EINVAL); 508 509 /* 510 * If this is a memory resource, map it into the kernel. 511 */ 512 switch (type) { 513 case SYS_RES_IOPORT: 514 map->r_bushandle = start; 515 map->r_bustag = X86_BUS_SPACE_IO; 516 map->r_size = length; 517 map->r_vaddr = NULL; 518 break; 519 case SYS_RES_MEMORY: 520 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 521 map->r_bustag = X86_BUS_SPACE_MEM; 522 map->r_size = length; 523 524 /* 525 * The handle is the virtual address. 526 */ 527 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 528 break; 529 } 530 return (0); 531 } 532 533 static int 534 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r, 535 struct resource_map *map) 536 { 537 538 /* 539 * If this is a memory resource, unmap it. 540 */ 541 switch (type) { 542 case SYS_RES_MEMORY: 543 pmap_unmapdev((vm_offset_t)map->r_vaddr, map->r_size); 544 /* FALLTHROUGH */ 545 case SYS_RES_IOPORT: 546 break; 547 default: 548 return (EINVAL); 549 } 550 return (0); 551 } 552 553 static int 554 nexus_release_resource(device_t bus, device_t child, int type, int rid, 555 struct resource *r) 556 { 557 558 if (rman_get_flags(r) & RF_ACTIVE) { 559 int error = bus_deactivate_resource(child, type, rid, r); 560 if (error) 561 return error; 562 } 563 return (rman_release_resource(r)); 564 } 565 566 /* 567 * Currently this uses the really grody interface from kern/kern_intr.c 568 * (which really doesn't belong in kern/anything.c). Eventually, all of 569 * the code in kern_intr.c and machdep_intr.c should get moved here, since 570 * this is going to be the official interface. 571 */ 572 static int 573 nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 574 int flags, driver_filter_t filter, void (*ihand)(void *), 575 void *arg, void **cookiep) 576 { 577 int error, domain; 578 579 /* somebody tried to setup an irq that failed to allocate! */ 580 if (irq == NULL) 581 panic("nexus_setup_intr: NULL irq resource!"); 582 583 *cookiep = NULL; 584 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 585 flags |= INTR_EXCL; 586 587 /* 588 * We depend here on rman_activate_resource() being idempotent. 589 */ 590 error = rman_activate_resource(irq); 591 if (error) 592 return (error); 593 if (bus_get_domain(child, &domain) != 0) 594 domain = 0; 595 596 error = intr_add_handler(device_get_nameunit(child), 597 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain); 598 599 return (error); 600 } 601 602 static int 603 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 604 { 605 return (intr_remove_handler(ih)); 606 } 607 608 #ifdef SMP 609 static int 610 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 611 { 612 return (intr_bind(rman_get_start(irq), cpu)); 613 } 614 #endif 615 616 static int 617 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 618 enum intr_polarity pol) 619 { 620 return (intr_config_intr(irq, trig, pol)); 621 } 622 623 static int 624 nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 625 void *cookie, const char *descr) 626 { 627 628 return (intr_describe(rman_get_start(irq), cookie, descr)); 629 } 630 631 static struct resource_list * 632 nexus_get_reslist(device_t dev, device_t child) 633 { 634 struct nexus_device *ndev = DEVTONX(child); 635 636 return (&ndev->nx_resources); 637 } 638 639 static int 640 nexus_set_resource(device_t dev, device_t child, int type, int rid, 641 rman_res_t start, rman_res_t count) 642 { 643 struct nexus_device *ndev = DEVTONX(child); 644 struct resource_list *rl = &ndev->nx_resources; 645 646 /* XXX this should return a success/failure indicator */ 647 resource_list_add(rl, type, rid, start, start + count - 1, count); 648 return(0); 649 } 650 651 static int 652 nexus_get_resource(device_t dev, device_t child, int type, int rid, 653 rman_res_t *startp, rman_res_t *countp) 654 { 655 struct nexus_device *ndev = DEVTONX(child); 656 struct resource_list *rl = &ndev->nx_resources; 657 struct resource_list_entry *rle; 658 659 rle = resource_list_find(rl, type, rid); 660 if (!rle) 661 return(ENOENT); 662 if (startp) 663 *startp = rle->start; 664 if (countp) 665 *countp = rle->count; 666 return(0); 667 } 668 669 static void 670 nexus_delete_resource(device_t dev, device_t child, int type, int rid) 671 { 672 struct nexus_device *ndev = DEVTONX(child); 673 struct resource_list *rl = &ndev->nx_resources; 674 675 resource_list_delete(rl, type, rid); 676 } 677 678 static int 679 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 680 cpuset_t *cpuset) 681 { 682 683 switch (op) { 684 #ifdef SMP 685 case INTR_CPUS: 686 if (setsize != sizeof(cpuset_t)) 687 return (EINVAL); 688 *cpuset = intr_cpus; 689 return (0); 690 #endif 691 default: 692 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 693 } 694 } 695 696 /* Called from the MSI code to add new IRQs to the IRQ rman. */ 697 void 698 nexus_add_irq(u_long irq) 699 { 700 701 if (rman_manage_region(&irq_rman, irq, irq) != 0) 702 panic("%s: failed", __func__); 703 } 704 705 #if defined(DEV_APIC) && defined(DEV_PCI) 706 static int 707 nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 708 { 709 710 return (msix_alloc(dev, irq)); 711 } 712 713 static int 714 nexus_release_msix(device_t pcib, device_t dev, int irq) 715 { 716 717 return (msix_release(irq)); 718 } 719 720 static int 721 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 722 { 723 724 return (msi_alloc(dev, count, maxcount, irqs)); 725 } 726 727 static int 728 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 729 { 730 731 return (msi_release(irqs, count)); 732 } 733 734 static int 735 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 736 { 737 738 return (msi_map(irq, addr, data)); 739 } 740 #endif /* DEV_APIC && DEV_PCI */ 741 742 /* Placeholder for system RAM. */ 743 static void 744 ram_identify(driver_t *driver, device_t parent) 745 { 746 747 if (resource_disabled("ram", 0)) 748 return; 749 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 750 panic("ram_identify"); 751 } 752 753 static int 754 ram_probe(device_t dev) 755 { 756 757 device_quiet(dev); 758 device_set_desc(dev, "System RAM"); 759 return (0); 760 } 761 762 static int 763 ram_attach(device_t dev) 764 { 765 struct bios_smap *smapbase, *smap, *smapend; 766 struct resource *res; 767 vm_paddr_t *p; 768 caddr_t kmdp; 769 uint32_t smapsize; 770 int error, rid; 771 772 /* Retrieve the system memory map from the loader. */ 773 kmdp = preload_search_by_type("elf kernel"); 774 if (kmdp == NULL) 775 kmdp = preload_search_by_type(ELF_KERN_STR); 776 smapbase = (struct bios_smap *)preload_search_info(kmdp, 777 MODINFO_METADATA | MODINFOMD_SMAP); 778 if (smapbase != NULL) { 779 smapsize = *((u_int32_t *)smapbase - 1); 780 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 781 782 rid = 0; 783 for (smap = smapbase; smap < smapend; smap++) { 784 if (smap->type != SMAP_TYPE_MEMORY || 785 smap->length == 0) 786 continue; 787 #ifdef __i386__ 788 /* 789 * Resources use long's to track resources, so 790 * we can't include memory regions above 4GB. 791 */ 792 if (smap->base > ~0ul) 793 continue; 794 #endif 795 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 796 smap->base, smap->length); 797 if (error) 798 panic( 799 "ram_attach: resource %d failed set with %d", 800 rid, error); 801 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 802 0); 803 if (res == NULL) 804 panic("ram_attach: resource %d failed to attach", 805 rid); 806 rid++; 807 } 808 return (0); 809 } 810 811 /* 812 * If the system map is not available, fall back to using 813 * dump_avail[]. We use the dump_avail[] array rather than 814 * phys_avail[] for the memory map as phys_avail[] contains 815 * holes for kernel memory, page 0, the message buffer, and 816 * the dcons buffer. We test the end address in the loop 817 * instead of the start since the start address for the first 818 * segment is 0. 819 */ 820 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 821 #ifdef PAE 822 /* 823 * Resources use long's to track resources, so we can't 824 * include memory regions above 4GB. 825 */ 826 if (p[0] > ~0ul) 827 break; 828 #endif 829 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 830 p[1] - p[0]); 831 if (error) 832 panic("ram_attach: resource %d failed set with %d", rid, 833 error); 834 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 835 if (res == NULL) 836 panic("ram_attach: resource %d failed to attach", rid); 837 } 838 return (0); 839 } 840 841 static device_method_t ram_methods[] = { 842 /* Device interface */ 843 DEVMETHOD(device_identify, ram_identify), 844 DEVMETHOD(device_probe, ram_probe), 845 DEVMETHOD(device_attach, ram_attach), 846 { 0, 0 } 847 }; 848 849 static driver_t ram_driver = { 850 "ram", 851 ram_methods, 852 1, /* no softc */ 853 }; 854 855 static devclass_t ram_devclass; 856 857 DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, 0, 0); 858 859 #ifdef DEV_ISA 860 /* 861 * Placeholder which claims PnP 'devices' which describe system 862 * resources. 863 */ 864 static struct isa_pnp_id sysresource_ids[] = { 865 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 866 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 867 { 0 } 868 }; 869 870 static int 871 sysresource_probe(device_t dev) 872 { 873 int result; 874 875 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 876 device_quiet(dev); 877 } 878 return(result); 879 } 880 881 static int 882 sysresource_attach(device_t dev) 883 { 884 return(0); 885 } 886 887 static device_method_t sysresource_methods[] = { 888 /* Device interface */ 889 DEVMETHOD(device_probe, sysresource_probe), 890 DEVMETHOD(device_attach, sysresource_attach), 891 DEVMETHOD(device_detach, bus_generic_detach), 892 DEVMETHOD(device_shutdown, bus_generic_shutdown), 893 DEVMETHOD(device_suspend, bus_generic_suspend), 894 DEVMETHOD(device_resume, bus_generic_resume), 895 { 0, 0 } 896 }; 897 898 static driver_t sysresource_driver = { 899 "sysresource", 900 sysresource_methods, 901 1, /* no softc */ 902 }; 903 904 static devclass_t sysresource_devclass; 905 906 DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 907 ISA_PNP_INFO(sysresource_ids); 908 #endif /* DEV_ISA */ 909