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 static devclass_t nexus_devclass; 196 197 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 198 199 static int 200 nexus_probe(device_t dev) 201 { 202 203 device_quiet(dev); /* suppress attach message for neatness */ 204 return (BUS_PROBE_GENERIC); 205 } 206 207 void 208 nexus_init_resources(void) 209 { 210 int irq; 211 212 /* 213 * XXX working notes: 214 * 215 * - IRQ resource creation should be moved to the PIC/APIC driver. 216 * - DRQ resource creation should be moved to the DMAC driver. 217 * - The above should be sorted to probe earlier than any child buses. 218 * 219 * - Leave I/O and memory creation here, as child probes may need them. 220 * (especially eg. ACPI) 221 */ 222 223 /* 224 * IRQ's are on the mainboard on old systems, but on the ISA part 225 * of PCI->ISA bridges. There would be multiple sets of IRQs on 226 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 227 * component, so in a way, PCI can be a partial child of an ISA bus(!). 228 * APIC interrupts are global though. 229 */ 230 irq_rman.rm_start = 0; 231 irq_rman.rm_type = RMAN_ARRAY; 232 irq_rman.rm_descr = "Interrupt request lines"; 233 irq_rman.rm_end = num_io_irqs - 1; 234 if (rman_init(&irq_rman)) 235 panic("nexus_init_resources irq_rman"); 236 237 /* 238 * We search for regions of existing IRQs and add those to the IRQ 239 * resource manager. 240 */ 241 for (irq = 0; irq < num_io_irqs; irq++) 242 if (intr_lookup_source(irq) != NULL) 243 if (rman_manage_region(&irq_rman, irq, irq) != 0) 244 panic("nexus_init_resources irq_rman add"); 245 246 /* 247 * ISA DMA on PCI systems is implemented in the ISA part of each 248 * PCI->ISA bridge and the channels can be duplicated if there are 249 * multiple bridges. (eg: laptops with docking stations) 250 */ 251 drq_rman.rm_start = 0; 252 drq_rman.rm_end = 7; 253 drq_rman.rm_type = RMAN_ARRAY; 254 drq_rman.rm_descr = "DMA request lines"; 255 /* XXX drq 0 not available on some machines */ 256 if (rman_init(&drq_rman) 257 || rman_manage_region(&drq_rman, 258 drq_rman.rm_start, drq_rman.rm_end)) 259 panic("nexus_init_resources drq_rman"); 260 261 /* 262 * However, IO ports and Memory truely are global at this level, 263 * as are APIC interrupts (however many IO APICS there turn out 264 * to be on large systems..) 265 */ 266 port_rman.rm_start = 0; 267 port_rman.rm_end = 0xffff; 268 port_rman.rm_type = RMAN_ARRAY; 269 port_rman.rm_descr = "I/O ports"; 270 if (rman_init(&port_rman) 271 || rman_manage_region(&port_rman, 0, 0xffff)) 272 panic("nexus_init_resources port_rman"); 273 274 mem_rman.rm_start = 0; 275 mem_rman.rm_end = cpu_getmaxphyaddr(); 276 mem_rman.rm_type = RMAN_ARRAY; 277 mem_rman.rm_descr = "I/O memory addresses"; 278 if (rman_init(&mem_rman) 279 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end)) 280 panic("nexus_init_resources mem_rman"); 281 } 282 283 static int 284 nexus_attach(device_t dev) 285 { 286 287 nexus_init_resources(); 288 bus_generic_probe(dev); 289 290 /* 291 * Explicitly add the legacy0 device here. Other platform 292 * types (such as ACPI), use their own nexus(4) subclass 293 * driver to override this routine and add their own root bus. 294 */ 295 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL) 296 panic("legacy: could not attach"); 297 bus_generic_attach(dev); 298 return 0; 299 } 300 301 static int 302 nexus_print_all_resources(device_t dev) 303 { 304 struct nexus_device *ndev = DEVTONX(dev); 305 struct resource_list *rl = &ndev->nx_resources; 306 int retval = 0; 307 308 if (STAILQ_FIRST(rl)) 309 retval += printf(" at"); 310 311 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 312 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 313 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 314 315 return retval; 316 } 317 318 static int 319 nexus_print_child(device_t bus, device_t child) 320 { 321 int retval = 0; 322 323 retval += bus_print_child_header(bus, child); 324 retval += nexus_print_all_resources(child); 325 if (device_get_flags(child)) 326 retval += printf(" flags %#x", device_get_flags(child)); 327 retval += printf("\n"); 328 329 return (retval); 330 } 331 332 static device_t 333 nexus_add_child(device_t bus, u_int order, const char *name, int unit) 334 { 335 device_t child; 336 struct nexus_device *ndev; 337 338 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 339 if (!ndev) 340 return(0); 341 resource_list_init(&ndev->nx_resources); 342 343 child = device_add_child_ordered(bus, order, name, unit); 344 345 /* should we free this in nexus_child_detached? */ 346 device_set_ivars(child, ndev); 347 348 return(child); 349 } 350 351 static struct rman * 352 nexus_rman(int type) 353 { 354 switch (type) { 355 case SYS_RES_IRQ: 356 return (&irq_rman); 357 case SYS_RES_DRQ: 358 return (&drq_rman); 359 case SYS_RES_IOPORT: 360 return (&port_rman); 361 case SYS_RES_MEMORY: 362 return (&mem_rman); 363 default: 364 return (NULL); 365 } 366 } 367 368 /* 369 * Allocate a resource on behalf of child. NB: child is usually going to be a 370 * child of one of our descendants, not a direct child of nexus0. 371 * (Exceptions include npx.) 372 */ 373 static struct resource * 374 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 375 rman_res_t start, rman_res_t end, rman_res_t count, 376 u_int flags) 377 { 378 struct nexus_device *ndev = DEVTONX(child); 379 struct resource *rv; 380 struct resource_list_entry *rle; 381 struct rman *rm; 382 int needactivate = flags & RF_ACTIVE; 383 384 /* 385 * If this is an allocation of the "default" range for a given 386 * RID, and we know what the resources for this device are 387 * (ie. they aren't maintained by a child bus), then work out 388 * the start/end values. 389 */ 390 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { 391 if (device_get_parent(child) != bus || ndev == NULL) 392 return(NULL); 393 rle = resource_list_find(&ndev->nx_resources, type, *rid); 394 if (rle == NULL) 395 return(NULL); 396 start = rle->start; 397 end = rle->end; 398 count = rle->count; 399 } 400 401 flags &= ~RF_ACTIVE; 402 rm = nexus_rman(type); 403 if (rm == NULL) 404 return (NULL); 405 406 rv = rman_reserve_resource(rm, start, end, count, flags, child); 407 if (rv == NULL) 408 return 0; 409 rman_set_rid(rv, *rid); 410 411 if (needactivate) { 412 if (bus_activate_resource(child, type, *rid, rv)) { 413 rman_release_resource(rv); 414 return 0; 415 } 416 } 417 418 return rv; 419 } 420 421 static int 422 nexus_adjust_resource(device_t bus, device_t child, int type, 423 struct resource *r, rman_res_t start, rman_res_t end) 424 { 425 struct rman *rm; 426 427 rm = nexus_rman(type); 428 if (rm == NULL) 429 return (ENXIO); 430 if (!rman_is_region_manager(r, rm)) 431 return (EINVAL); 432 return (rman_adjust_resource(r, start, end)); 433 } 434 435 static int 436 nexus_activate_resource(device_t bus, device_t child, int type, int rid, 437 struct resource *r) 438 { 439 struct resource_map map; 440 int error; 441 442 error = rman_activate_resource(r); 443 if (error != 0) 444 return (error); 445 446 if (!(rman_get_flags(r) & RF_UNMAPPED) && 447 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 448 error = nexus_map_resource(bus, child, type, r, NULL, &map); 449 if (error) { 450 rman_deactivate_resource(r); 451 return (error); 452 } 453 454 rman_set_mapping(r,&map); 455 } 456 return (0); 457 } 458 459 static int 460 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 461 struct resource *r) 462 { 463 struct resource_map map; 464 int error; 465 466 error = rman_deactivate_resource(r); 467 if (error) 468 return (error); 469 470 if (!(rman_get_flags(r) & RF_UNMAPPED) && 471 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) { 472 rman_get_mapping(r, &map); 473 nexus_unmap_resource(bus, child, type, r, &map); 474 } 475 return (0); 476 } 477 478 static int 479 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, 480 struct resource_map_request *argsp, struct resource_map *map) 481 { 482 struct resource_map_request args; 483 rman_res_t end, length, start; 484 485 /* Resources must be active to be mapped. */ 486 if (!(rman_get_flags(r) & RF_ACTIVE)) 487 return (ENXIO); 488 489 /* Mappings are only supported on I/O and memory resources. */ 490 switch (type) { 491 case SYS_RES_IOPORT: 492 case SYS_RES_MEMORY: 493 break; 494 default: 495 return (EINVAL); 496 } 497 498 resource_init_map_request(&args); 499 if (argsp != NULL) 500 bcopy(argsp, &args, imin(argsp->size, args.size)); 501 start = rman_get_start(r) + args.offset; 502 if (args.length == 0) 503 length = rman_get_size(r); 504 else 505 length = args.length; 506 end = start + length - 1; 507 if (start > rman_get_end(r) || start < rman_get_start(r)) 508 return (EINVAL); 509 if (end > rman_get_end(r) || end < start) 510 return (EINVAL); 511 512 /* 513 * If this is a memory resource, map it into the kernel. 514 */ 515 switch (type) { 516 case SYS_RES_IOPORT: 517 map->r_bushandle = start; 518 map->r_bustag = X86_BUS_SPACE_IO; 519 map->r_size = length; 520 map->r_vaddr = NULL; 521 break; 522 case SYS_RES_MEMORY: 523 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 524 map->r_bustag = X86_BUS_SPACE_MEM; 525 map->r_size = length; 526 527 /* 528 * The handle is the virtual address. 529 */ 530 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 531 break; 532 } 533 return (0); 534 } 535 536 static int 537 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r, 538 struct resource_map *map) 539 { 540 541 /* 542 * If this is a memory resource, unmap it. 543 */ 544 switch (type) { 545 case SYS_RES_MEMORY: 546 pmap_unmapdev((vm_offset_t)map->r_vaddr, map->r_size); 547 /* FALLTHROUGH */ 548 case SYS_RES_IOPORT: 549 break; 550 default: 551 return (EINVAL); 552 } 553 return (0); 554 } 555 556 static int 557 nexus_release_resource(device_t bus, device_t child, int type, int rid, 558 struct resource *r) 559 { 560 561 if (rman_get_flags(r) & RF_ACTIVE) { 562 int error = bus_deactivate_resource(child, type, rid, r); 563 if (error) 564 return error; 565 } 566 return (rman_release_resource(r)); 567 } 568 569 /* 570 * Currently this uses the really grody interface from kern/kern_intr.c 571 * (which really doesn't belong in kern/anything.c). Eventually, all of 572 * the code in kern_intr.c and machdep_intr.c should get moved here, since 573 * this is going to be the official interface. 574 */ 575 static int 576 nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 577 int flags, driver_filter_t filter, void (*ihand)(void *), 578 void *arg, void **cookiep) 579 { 580 int error, domain; 581 582 /* somebody tried to setup an irq that failed to allocate! */ 583 if (irq == NULL) 584 panic("nexus_setup_intr: NULL irq resource!"); 585 586 *cookiep = NULL; 587 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 588 flags |= INTR_EXCL; 589 590 /* 591 * We depend here on rman_activate_resource() being idempotent. 592 */ 593 error = rman_activate_resource(irq); 594 if (error) 595 return (error); 596 if (bus_get_domain(child, &domain) != 0) 597 domain = 0; 598 599 error = intr_add_handler(device_get_nameunit(child), 600 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain); 601 if (error == 0) 602 rman_set_irq_cookie(irq, *cookiep); 603 604 return (error); 605 } 606 607 static int 608 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 609 { 610 int error; 611 612 error = intr_remove_handler(ih); 613 if (error == 0) 614 rman_set_irq_cookie(r, NULL); 615 return (error); 616 } 617 618 static int 619 nexus_suspend_intr(device_t dev, device_t child, struct resource *irq) 620 { 621 return (intr_event_suspend_handler(rman_get_irq_cookie(irq))); 622 } 623 624 static int 625 nexus_resume_intr(device_t dev, device_t child, struct resource *irq) 626 { 627 return (intr_event_resume_handler(rman_get_irq_cookie(irq))); 628 } 629 630 #ifdef SMP 631 static int 632 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 633 { 634 return (intr_bind(rman_get_start(irq), cpu)); 635 } 636 #endif 637 638 static int 639 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 640 enum intr_polarity pol) 641 { 642 return (intr_config_intr(irq, trig, pol)); 643 } 644 645 static int 646 nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 647 void *cookie, const char *descr) 648 { 649 650 return (intr_describe(rman_get_start(irq), cookie, descr)); 651 } 652 653 static struct resource_list * 654 nexus_get_reslist(device_t dev, device_t child) 655 { 656 struct nexus_device *ndev = DEVTONX(child); 657 658 return (&ndev->nx_resources); 659 } 660 661 static int 662 nexus_set_resource(device_t dev, device_t child, int type, int rid, 663 rman_res_t start, rman_res_t count) 664 { 665 struct nexus_device *ndev = DEVTONX(child); 666 struct resource_list *rl = &ndev->nx_resources; 667 668 /* XXX this should return a success/failure indicator */ 669 resource_list_add(rl, type, rid, start, start + count - 1, count); 670 return(0); 671 } 672 673 static int 674 nexus_get_resource(device_t dev, device_t child, int type, int rid, 675 rman_res_t *startp, rman_res_t *countp) 676 { 677 struct nexus_device *ndev = DEVTONX(child); 678 struct resource_list *rl = &ndev->nx_resources; 679 struct resource_list_entry *rle; 680 681 rle = resource_list_find(rl, type, rid); 682 if (!rle) 683 return(ENOENT); 684 if (startp) 685 *startp = rle->start; 686 if (countp) 687 *countp = rle->count; 688 return(0); 689 } 690 691 static void 692 nexus_delete_resource(device_t dev, device_t child, int type, int rid) 693 { 694 struct nexus_device *ndev = DEVTONX(child); 695 struct resource_list *rl = &ndev->nx_resources; 696 697 resource_list_delete(rl, type, rid); 698 } 699 700 static int 701 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 702 cpuset_t *cpuset) 703 { 704 705 switch (op) { 706 #ifdef SMP 707 case INTR_CPUS: 708 if (setsize != sizeof(cpuset_t)) 709 return (EINVAL); 710 *cpuset = intr_cpus; 711 return (0); 712 #endif 713 default: 714 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 715 } 716 } 717 718 /* Called from the MSI code to add new IRQs to the IRQ rman. */ 719 void 720 nexus_add_irq(u_long irq) 721 { 722 723 if (rman_manage_region(&irq_rman, irq, irq) != 0) 724 panic("%s: failed", __func__); 725 } 726 727 #if defined(DEV_APIC) && defined(DEV_PCI) 728 static int 729 nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 730 { 731 732 return (msix_alloc(dev, irq)); 733 } 734 735 static int 736 nexus_release_msix(device_t pcib, device_t dev, int irq) 737 { 738 739 return (msix_release(irq)); 740 } 741 742 static int 743 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 744 { 745 746 return (msi_alloc(dev, count, maxcount, irqs)); 747 } 748 749 static int 750 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 751 { 752 753 return (msi_release(irqs, count)); 754 } 755 756 static int 757 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 758 { 759 760 return (msi_map(irq, addr, data)); 761 } 762 #endif /* DEV_APIC && DEV_PCI */ 763 764 /* Placeholder for system RAM. */ 765 static void 766 ram_identify(driver_t *driver, device_t parent) 767 { 768 769 if (resource_disabled("ram", 0)) 770 return; 771 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 772 panic("ram_identify"); 773 } 774 775 static int 776 ram_probe(device_t dev) 777 { 778 779 device_quiet(dev); 780 device_set_desc(dev, "System RAM"); 781 return (0); 782 } 783 784 static int 785 ram_attach(device_t dev) 786 { 787 struct bios_smap *smapbase, *smap, *smapend; 788 struct resource *res; 789 rman_res_t length; 790 vm_paddr_t *p; 791 caddr_t kmdp; 792 uint32_t smapsize; 793 int error, rid; 794 795 /* Retrieve the system memory map from the loader. */ 796 kmdp = preload_search_by_type("elf kernel"); 797 if (kmdp == NULL) 798 kmdp = preload_search_by_type(ELF_KERN_STR); 799 smapbase = (struct bios_smap *)preload_search_info(kmdp, 800 MODINFO_METADATA | MODINFOMD_SMAP); 801 if (smapbase != NULL) { 802 smapsize = *((u_int32_t *)smapbase - 1); 803 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 804 805 rid = 0; 806 for (smap = smapbase; smap < smapend; smap++) { 807 if (smap->type != SMAP_TYPE_MEMORY || 808 smap->length == 0) 809 continue; 810 if (smap->base > mem_rman.rm_end) 811 continue; 812 length = smap->base + smap->length > mem_rman.rm_end ? 813 mem_rman.rm_end - smap->base : smap->length; 814 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 815 smap->base, length); 816 if (error) 817 panic( 818 "ram_attach: resource %d failed set with %d", 819 rid, error); 820 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 821 0); 822 if (res == NULL) 823 panic("ram_attach: resource %d failed to attach", 824 rid); 825 rid++; 826 } 827 return (0); 828 } 829 830 /* 831 * If the system map is not available, fall back to using 832 * dump_avail[]. We use the dump_avail[] array rather than 833 * phys_avail[] for the memory map as phys_avail[] contains 834 * holes for kernel memory, page 0, the message buffer, and 835 * the dcons buffer. We test the end address in the loop 836 * instead of the start since the start address for the first 837 * segment is 0. 838 */ 839 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 840 if (p[0] > mem_rman.rm_end) 841 break; 842 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) - 843 p[0]; 844 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 845 length); 846 if (error) 847 panic("ram_attach: resource %d failed set with %d", rid, 848 error); 849 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 850 if (res == NULL) 851 panic("ram_attach: resource %d failed to attach", rid); 852 } 853 return (0); 854 } 855 856 static device_method_t ram_methods[] = { 857 /* Device interface */ 858 DEVMETHOD(device_identify, ram_identify), 859 DEVMETHOD(device_probe, ram_probe), 860 DEVMETHOD(device_attach, ram_attach), 861 { 0, 0 } 862 }; 863 864 static driver_t ram_driver = { 865 "ram", 866 ram_methods, 867 1, /* no softc */ 868 }; 869 870 static devclass_t ram_devclass; 871 872 DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, 0, 0); 873 874 #ifdef DEV_ISA 875 /* 876 * Placeholder which claims PnP 'devices' which describe system 877 * resources. 878 */ 879 static struct isa_pnp_id sysresource_ids[] = { 880 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 881 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 882 { 0 } 883 }; 884 885 static int 886 sysresource_probe(device_t dev) 887 { 888 int result; 889 890 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 891 device_quiet(dev); 892 } 893 return(result); 894 } 895 896 static int 897 sysresource_attach(device_t dev) 898 { 899 return(0); 900 } 901 902 static device_method_t sysresource_methods[] = { 903 /* Device interface */ 904 DEVMETHOD(device_probe, sysresource_probe), 905 DEVMETHOD(device_attach, sysresource_attach), 906 DEVMETHOD(device_detach, bus_generic_detach), 907 DEVMETHOD(device_shutdown, bus_generic_shutdown), 908 DEVMETHOD(device_suspend, bus_generic_suspend), 909 DEVMETHOD(device_resume, bus_generic_resume), 910 { 0, 0 } 911 }; 912 913 static driver_t sysresource_driver = { 914 "sysresource", 915 sysresource_methods, 916 1, /* no softc */ 917 }; 918 919 static devclass_t sysresource_devclass; 920 921 DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 922 ISA_PNP_INFO(sysresource_ids); 923 #endif /* DEV_ISA */ 924