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 31 /* 32 * This code implements a `root nexus' for Arm Architecture 33 * machines. The function of the root nexus is to serve as an 34 * attachment point for both processors and buses, and to manage 35 * resources which are common to all of them. In particular, 36 * this code implements the core resource managers for interrupt 37 * requests and I/O memory address space. 38 */ 39 40 #include "opt_acpi.h" 41 #include "opt_platform.h" 42 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/bus.h> 49 #include <sys/kernel.h> 50 #include <sys/malloc.h> 51 #include <sys/module.h> 52 #include <machine/bus.h> 53 #include <sys/rman.h> 54 #include <sys/interrupt.h> 55 56 #include <machine/machdep.h> 57 #include <machine/vmparam.h> 58 #include <machine/pcb.h> 59 #include <vm/vm.h> 60 #include <vm/pmap.h> 61 62 #include <machine/resource.h> 63 #include <machine/intr.h> 64 65 #ifdef FDT 66 #include <dev/ofw/ofw_bus_subr.h> 67 #include <dev/ofw/openfirm.h> 68 #include "ofw_bus_if.h" 69 #endif 70 #ifdef DEV_ACPI 71 #include <contrib/dev/acpica/include/acpi.h> 72 #include <dev/acpica/acpivar.h> 73 #include "acpi_bus_if.h" 74 #include "pcib_if.h" 75 #endif 76 77 extern struct bus_space memmap_bus; 78 79 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 80 81 struct nexus_device { 82 struct resource_list nx_resources; 83 }; 84 85 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 86 87 static struct rman mem_rman; 88 static struct rman irq_rman; 89 90 static int nexus_attach(device_t); 91 92 #ifdef FDT 93 static device_probe_t nexus_fdt_probe; 94 static device_attach_t nexus_fdt_attach; 95 #endif 96 #ifdef DEV_ACPI 97 static device_probe_t nexus_acpi_probe; 98 static device_attach_t nexus_acpi_attach; 99 #endif 100 101 static int nexus_print_child(device_t, device_t); 102 static device_t nexus_add_child(device_t, u_int, const char *, int); 103 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 104 rman_res_t, rman_res_t, rman_res_t, u_int); 105 static int nexus_activate_resource(device_t, device_t, int, int, 106 struct resource *); 107 static int nexus_adjust_resource(device_t, device_t, int, struct resource *, 108 rman_res_t, rman_res_t); 109 static int nexus_map_resource(device_t, device_t, int, struct resource *, 110 struct resource_map_request *, struct resource_map *); 111 static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 112 enum intr_polarity pol); 113 static struct resource_list *nexus_get_reslist(device_t, device_t); 114 static int nexus_set_resource(device_t, device_t, int, int, 115 rman_res_t, rman_res_t); 116 static int nexus_deactivate_resource(device_t, device_t, int, int, 117 struct resource *); 118 static int nexus_release_resource(device_t, device_t, int, int, 119 struct resource *); 120 121 static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, 122 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep); 123 static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); 124 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); 125 #ifdef SMP 126 static int nexus_bind_intr(device_t, device_t, struct resource *, int); 127 #endif 128 129 #ifdef FDT 130 static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, 131 int icells, pcell_t *intr); 132 #endif 133 134 static device_method_t nexus_methods[] = { 135 /* Bus interface */ 136 DEVMETHOD(bus_print_child, nexus_print_child), 137 DEVMETHOD(bus_add_child, nexus_add_child), 138 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 139 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 140 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource), 141 DEVMETHOD(bus_map_resource, nexus_map_resource), 142 DEVMETHOD(bus_config_intr, nexus_config_intr), 143 DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 144 DEVMETHOD(bus_set_resource, nexus_set_resource), 145 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 146 DEVMETHOD(bus_release_resource, nexus_release_resource), 147 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 148 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 149 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), 150 #ifdef SMP 151 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 152 #endif 153 { 0, 0 } 154 }; 155 156 static driver_t nexus_driver = { 157 "nexus", 158 nexus_methods, 159 1 /* no softc */ 160 }; 161 162 static int 163 nexus_attach(device_t dev) 164 { 165 166 mem_rman.rm_start = 0; 167 mem_rman.rm_end = BUS_SPACE_MAXADDR; 168 mem_rman.rm_type = RMAN_ARRAY; 169 mem_rman.rm_descr = "I/O memory addresses"; 170 if (rman_init(&mem_rman) || 171 rman_manage_region(&mem_rman, 0, BUS_SPACE_MAXADDR)) 172 panic("nexus_attach mem_rman"); 173 irq_rman.rm_start = 0; 174 irq_rman.rm_end = ~0; 175 irq_rman.rm_type = RMAN_ARRAY; 176 irq_rman.rm_descr = "Interrupts"; 177 if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, 0, ~0)) 178 panic("nexus_attach irq_rman"); 179 180 bus_generic_probe(dev); 181 bus_generic_attach(dev); 182 183 return (0); 184 } 185 186 static int 187 nexus_print_child(device_t bus, device_t child) 188 { 189 int retval = 0; 190 191 retval += bus_print_child_header(bus, child); 192 retval += printf("\n"); 193 194 return (retval); 195 } 196 197 static device_t 198 nexus_add_child(device_t bus, u_int order, const char *name, int unit) 199 { 200 device_t child; 201 struct nexus_device *ndev; 202 203 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 204 if (!ndev) 205 return (0); 206 resource_list_init(&ndev->nx_resources); 207 208 child = device_add_child_ordered(bus, order, name, unit); 209 210 /* should we free this in nexus_child_detached? */ 211 device_set_ivars(child, ndev); 212 213 return (child); 214 } 215 216 /* 217 * Allocate a resource on behalf of child. NB: child is usually going to be a 218 * child of one of our descendants, not a direct child of nexus0. 219 * (Exceptions include footbridge.) 220 */ 221 static struct resource * 222 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 223 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 224 { 225 struct nexus_device *ndev = DEVTONX(child); 226 struct resource *rv; 227 struct resource_list_entry *rle; 228 struct rman *rm; 229 int needactivate = flags & RF_ACTIVE; 230 231 /* 232 * If this is an allocation of the "default" range for a given 233 * RID, and we know what the resources for this device are 234 * (ie. they aren't maintained by a child bus), then work out 235 * the start/end values. 236 */ 237 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { 238 if (device_get_parent(child) != bus || ndev == NULL) 239 return(NULL); 240 rle = resource_list_find(&ndev->nx_resources, type, *rid); 241 if (rle == NULL) 242 return(NULL); 243 start = rle->start; 244 end = rle->end; 245 count = rle->count; 246 } 247 248 switch (type) { 249 case SYS_RES_IRQ: 250 rm = &irq_rman; 251 break; 252 253 case SYS_RES_MEMORY: 254 case SYS_RES_IOPORT: 255 rm = &mem_rman; 256 break; 257 258 default: 259 return (NULL); 260 } 261 262 rv = rman_reserve_resource(rm, start, end, count, flags, child); 263 if (rv == NULL) 264 return (NULL); 265 266 rman_set_rid(rv, *rid); 267 rman_set_bushandle(rv, rman_get_start(rv)); 268 269 if (needactivate) { 270 if (bus_activate_resource(child, type, *rid, rv)) { 271 rman_release_resource(rv); 272 return (NULL); 273 } 274 } 275 276 return (rv); 277 } 278 279 static int 280 nexus_adjust_resource(device_t bus __unused, device_t child __unused, int type, 281 struct resource *r, rman_res_t start, rman_res_t end) 282 { 283 struct rman *rm; 284 285 switch (type) { 286 case SYS_RES_IRQ: 287 rm = &irq_rman; 288 break; 289 case SYS_RES_MEMORY: 290 rm = &mem_rman; 291 break; 292 default: 293 return (EINVAL); 294 } 295 if (rman_is_region_manager(r, rm) == 0) 296 return (EINVAL); 297 return (rman_adjust_resource(r, start, end)); 298 } 299 300 static int 301 nexus_release_resource(device_t bus, device_t child, int type, int rid, 302 struct resource *res) 303 { 304 int error; 305 306 if (rman_get_flags(res) & RF_ACTIVE) { 307 error = bus_deactivate_resource(child, type, rid, res); 308 if (error) 309 return (error); 310 } 311 return (rman_release_resource(res)); 312 } 313 314 static int 315 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 316 enum intr_polarity pol) 317 { 318 319 /* 320 * On arm64 (due to INTRNG), ACPI interrupt configuration is 321 * done in nexus_acpi_map_intr(). 322 */ 323 return (0); 324 } 325 326 static int 327 nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, 328 driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) 329 { 330 int error; 331 332 if ((rman_get_flags(res) & RF_SHAREABLE) == 0) 333 flags |= INTR_EXCL; 334 335 /* We depend here on rman_activate_resource() being idempotent. */ 336 error = rman_activate_resource(res); 337 if (error) 338 return (error); 339 340 error = intr_setup_irq(child, res, filt, intr, arg, flags, cookiep); 341 342 return (error); 343 } 344 345 static int 346 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 347 { 348 349 return (intr_teardown_irq(child, r, ih)); 350 } 351 352 #ifdef SMP 353 static int 354 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 355 { 356 357 return (intr_bind_irq(child, irq, cpu)); 358 } 359 #endif 360 361 static bus_space_tag_t 362 nexus_get_bus_tag(device_t bus __unused, device_t child __unused) 363 { 364 365 return(&memmap_bus); 366 } 367 368 static int 369 nexus_activate_resource(device_t bus, device_t child, int type, int rid, 370 struct resource *r) 371 { 372 struct resource_map map; 373 int err; 374 375 if ((err = rman_activate_resource(r)) != 0) 376 return (err); 377 378 /* 379 * If this is a memory resource, map it into the kernel. 380 */ 381 switch (type) { 382 case SYS_RES_IOPORT: 383 case SYS_RES_MEMORY: 384 if ((rman_get_flags(r) & RF_UNMAPPED) == 0) { 385 err = nexus_map_resource(bus, child, type, r, NULL, 386 &map); 387 if (err != 0) { 388 rman_deactivate_resource(r); 389 return (err); 390 } 391 392 rman_set_mapping(r, &map); 393 } 394 break; 395 case SYS_RES_IRQ: 396 err = intr_activate_irq(child, r); 397 if (err != 0) { 398 rman_deactivate_resource(r); 399 return (err); 400 } 401 } 402 return (0); 403 } 404 405 static struct resource_list * 406 nexus_get_reslist(device_t dev, device_t child) 407 { 408 struct nexus_device *ndev = DEVTONX(child); 409 410 return (&ndev->nx_resources); 411 } 412 413 static int 414 nexus_set_resource(device_t dev, device_t child, int type, int rid, 415 rman_res_t start, rman_res_t count) 416 { 417 struct nexus_device *ndev = DEVTONX(child); 418 struct resource_list *rl = &ndev->nx_resources; 419 420 /* XXX this should return a success/failure indicator */ 421 resource_list_add(rl, type, rid, start, start + count - 1, count); 422 423 return(0); 424 } 425 426 static int 427 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 428 struct resource *r) 429 { 430 bus_size_t psize; 431 bus_space_handle_t vaddr; 432 433 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 434 psize = (bus_size_t)rman_get_size(r); 435 vaddr = rman_get_bushandle(r); 436 437 if (vaddr != 0) { 438 bus_space_unmap(&memmap_bus, vaddr, psize); 439 rman_set_virtual(r, NULL); 440 rman_set_bushandle(r, 0); 441 } 442 } else if (type == SYS_RES_IRQ) { 443 intr_deactivate_irq(child, r); 444 } 445 446 return (rman_deactivate_resource(r)); 447 } 448 449 static int 450 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, 451 struct resource_map_request *argsp, struct resource_map *map) 452 { 453 struct resource_map_request args; 454 rman_res_t end, length, start; 455 456 /* Resources must be active to be mapped. */ 457 if ((rman_get_flags(r) & RF_ACTIVE) == 0) 458 return (ENXIO); 459 460 /* Mappings are only supported on I/O and memory resources. */ 461 switch (type) { 462 case SYS_RES_IOPORT: 463 case SYS_RES_MEMORY: 464 break; 465 default: 466 return (EINVAL); 467 } 468 469 resource_init_map_request(&args); 470 if (argsp != NULL) 471 bcopy(argsp, &args, imin(argsp->size, args.size)); 472 start = rman_get_start(r) + args.offset; 473 if (args.length == 0) 474 length = rman_get_size(r); 475 else 476 length = args.length; 477 end = start + length - 1; 478 if (start > rman_get_end(r) || start < rman_get_start(r)) 479 return (EINVAL); 480 if (end > rman_get_end(r) || end < start) 481 return (EINVAL); 482 483 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 484 map->r_bustag = &memmap_bus; 485 map->r_size = length; 486 487 /* 488 * The handle is the virtual address. 489 */ 490 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 491 return (0); 492 } 493 494 #ifdef FDT 495 static device_method_t nexus_fdt_methods[] = { 496 /* Device interface */ 497 DEVMETHOD(device_probe, nexus_fdt_probe), 498 DEVMETHOD(device_attach, nexus_fdt_attach), 499 500 /* OFW interface */ 501 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), 502 503 DEVMETHOD_END, 504 }; 505 506 #define nexus_baseclasses nexus_fdt_baseclasses 507 DEFINE_CLASS_1(nexus, nexus_fdt_driver, nexus_fdt_methods, 1, nexus_driver); 508 #undef nexus_baseclasses 509 510 EARLY_DRIVER_MODULE(nexus_fdt, root, nexus_fdt_driver, 0, 0, 511 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); 512 513 static int 514 nexus_fdt_probe(device_t dev) 515 { 516 517 if (arm64_bus_method != ARM64_BUS_FDT) 518 return (ENXIO); 519 520 device_quiet(dev); 521 return (BUS_PROBE_DEFAULT); 522 } 523 524 static int 525 nexus_fdt_attach(device_t dev) 526 { 527 528 nexus_add_child(dev, 10, "ofwbus", 0); 529 return (nexus_attach(dev)); 530 } 531 532 static int 533 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, 534 pcell_t *intr) 535 { 536 u_int irq; 537 struct intr_map_data_fdt *fdt_data; 538 size_t len; 539 540 len = sizeof(*fdt_data) + icells * sizeof(pcell_t); 541 fdt_data = (struct intr_map_data_fdt *)intr_alloc_map_data( 542 INTR_MAP_DATA_FDT, len, M_WAITOK | M_ZERO); 543 fdt_data->iparent = iparent; 544 fdt_data->ncells = icells; 545 memcpy(fdt_data->cells, intr, icells * sizeof(pcell_t)); 546 irq = intr_map_irq(NULL, iparent, (struct intr_map_data *)fdt_data); 547 return (irq); 548 } 549 #endif 550 551 #ifdef DEV_ACPI 552 static int nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol); 553 554 static device_method_t nexus_acpi_methods[] = { 555 /* Device interface */ 556 DEVMETHOD(device_probe, nexus_acpi_probe), 557 DEVMETHOD(device_attach, nexus_acpi_attach), 558 559 /* ACPI interface */ 560 DEVMETHOD(acpi_bus_map_intr, nexus_acpi_map_intr), 561 562 DEVMETHOD_END, 563 }; 564 565 #define nexus_baseclasses nexus_acpi_baseclasses 566 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, 567 nexus_driver); 568 #undef nexus_baseclasses 569 570 EARLY_DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0, 571 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); 572 573 static int 574 nexus_acpi_probe(device_t dev) 575 { 576 577 if (arm64_bus_method != ARM64_BUS_ACPI || acpi_identify() != 0) 578 return (ENXIO); 579 580 device_quiet(dev); 581 return (BUS_PROBE_LOW_PRIORITY); 582 } 583 584 static int 585 nexus_acpi_attach(device_t dev) 586 { 587 588 nexus_add_child(dev, 10, "acpi", 0); 589 return (nexus_attach(dev)); 590 } 591 592 static int 593 nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol) 594 { 595 struct intr_map_data_acpi *acpi_data; 596 size_t len; 597 598 len = sizeof(*acpi_data); 599 acpi_data = (struct intr_map_data_acpi *)intr_alloc_map_data( 600 INTR_MAP_DATA_ACPI, len, M_WAITOK | M_ZERO); 601 acpi_data->irq = irq; 602 acpi_data->pol = pol; 603 acpi_data->trig = trig; 604 605 /* 606 * TODO: This will only handle a single interrupt controller. 607 * ACPI will map multiple controllers into a single virtual IRQ 608 * space. Each controller has a System Vector Base to hold the 609 * first irq it handles in this space. As such the correct way 610 * to handle interrupts with ACPI is to search through the 611 * controllers for the largest base value that is no larger than 612 * the IRQ value. 613 */ 614 irq = intr_map_irq(NULL, ACPI_INTR_XREF, 615 (struct intr_map_data *)acpi_data); 616 return (irq); 617 } 618 #endif 619