nexus.c revision 119970
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 * $FreeBSD: head/sys/ia64/ia64/nexus.c 119970 2003-09-10 22:49:38Z marcel $ 30 */ 31 32/* 33 * This code implements a `root nexus' for Intel Architecture 34 * machines. The function of the root nexus is to serve as an 35 * attachment point for both processors and buses, and to manage 36 * resources which are common to all of them. In particular, 37 * this code implements the core resource managers for interrupt 38 * requests, DMA requests (which rightfully should be a part of the 39 * ISA code but it's easier to do it here for now), I/O port addresses, 40 * and I/O memory address space. 41 */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/bus.h> 46#include <sys/kernel.h> 47#include <sys/malloc.h> 48#include <sys/module.h> 49#include <machine/bus.h> 50#include <sys/rman.h> 51#include <sys/interrupt.h> 52 53#include <vm/vm.h> 54#include <vm/pmap.h> 55 56#include <machine/intr.h> 57#include <machine/nexusvar.h> 58#include <machine/pmap.h> 59#include <machine/resource.h> 60#include <machine/sapicvar.h> 61#include <machine/vmparam.h> 62 63#include <isa/isareg.h> 64#include <sys/rtprio.h> 65 66static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 67struct nexus_device { 68 struct resource_list nx_resources; 69 int nx_pcibus; 70}; 71 72#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 73 74static struct rman irq_rman, drq_rman, port_rman, mem_rman; 75 76static int nexus_probe(device_t); 77static int nexus_attach(device_t); 78static int nexus_print_resources(struct resource_list *rl, const char *name, int type, 79 const char *format); 80static int nexus_print_all_resources(device_t dev); 81static int nexus_print_child(device_t, device_t); 82static device_t nexus_add_child(device_t bus, int order, const char *name, 83 int unit); 84static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 85 u_long, u_long, u_long, u_int); 86static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); 87static int nexus_write_ivar(device_t, device_t, int, uintptr_t); 88static int nexus_activate_resource(device_t, device_t, int, int, 89 struct resource *); 90static int nexus_deactivate_resource(device_t, device_t, int, int, 91 struct resource *); 92static int nexus_release_resource(device_t, device_t, int, int, 93 struct resource *); 94static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 95 void (*)(void *), void *, void **); 96static int nexus_teardown_intr(device_t, device_t, struct resource *, 97 void *); 98static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); 99static int nexus_get_resource(device_t, device_t, int, int, u_long *, 100 u_long *); 101static void nexus_delete_resource(device_t, device_t, int, int); 102static int nexus_config_intr(device_t, int, enum intr_trigger, 103 enum intr_polarity); 104 105static device_method_t nexus_methods[] = { 106 /* Device interface */ 107 DEVMETHOD(device_probe, nexus_probe), 108 DEVMETHOD(device_attach, nexus_attach), 109 DEVMETHOD(device_detach, bus_generic_detach), 110 DEVMETHOD(device_shutdown, bus_generic_shutdown), 111 DEVMETHOD(device_suspend, bus_generic_suspend), 112 DEVMETHOD(device_resume, bus_generic_resume), 113 114 /* Bus interface */ 115 DEVMETHOD(bus_print_child, nexus_print_child), 116 DEVMETHOD(bus_add_child, nexus_add_child), 117 DEVMETHOD(bus_read_ivar, nexus_read_ivar), 118 DEVMETHOD(bus_write_ivar, nexus_write_ivar), 119 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 120 DEVMETHOD(bus_release_resource, nexus_release_resource), 121 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 122 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 123 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 124 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 125 DEVMETHOD(bus_set_resource, nexus_set_resource), 126 DEVMETHOD(bus_get_resource, nexus_get_resource), 127 DEVMETHOD(bus_delete_resource, nexus_delete_resource), 128 DEVMETHOD(bus_config_intr, nexus_config_intr), 129 130 { 0, 0 } 131}; 132 133static driver_t nexus_driver = { 134 "nexus", 135 nexus_methods, 136 1, /* no softc */ 137}; 138static devclass_t nexus_devclass; 139 140DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 141 142static int 143nexus_probe(device_t dev) 144{ 145 146 device_quiet(dev); /* suppress attach message for neatness */ 147 148 /* 149 * XXX working notes: 150 * 151 * - IRQ resource creation should be moved to the PIC/APIC driver. 152 * - DRQ resource creation should be moved to the DMAC driver. 153 * - The above should be sorted to probe earlier than any child busses. 154 * 155 * - Leave I/O and memory creation here, as child probes may need them. 156 * (especially eg. ACPI) 157 */ 158 159 /* 160 * IRQ's are on the mainboard on old systems, but on the ISA part 161 * of PCI->ISA bridges. There would be multiple sets of IRQs on 162 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 163 * component, so in a way, PCI can be a partial child of an ISA bus(!). 164 * APIC interrupts are global though. 165 * 166 * XXX We depend on the AT PIC driver correctly claiming IRQ 2 167 * to prevent its reuse elsewhere in the !APIC_IO case. 168 */ 169 irq_rman.rm_start = 0; 170 irq_rman.rm_type = RMAN_ARRAY; 171 irq_rman.rm_descr = "Interrupt request lines"; 172 irq_rman.rm_end = 255; 173 if (rman_init(&irq_rman) 174 || rman_manage_region(&irq_rman, 175 irq_rman.rm_start, irq_rman.rm_end)) 176 panic("nexus_probe irq_rman"); 177 178 /* 179 * ISA DMA on PCI systems is implemented in the ISA part of each 180 * PCI->ISA bridge and the channels can be duplicated if there are 181 * multiple bridges. (eg: laptops with docking stations) 182 */ 183 drq_rman.rm_start = 0; 184 drq_rman.rm_end = 7; 185 drq_rman.rm_type = RMAN_ARRAY; 186 drq_rman.rm_descr = "DMA request lines"; 187 /* XXX drq 0 not available on some machines */ 188 if (rman_init(&drq_rman) 189 || rman_manage_region(&drq_rman, 190 drq_rman.rm_start, drq_rman.rm_end)) 191 panic("nexus_probe drq_rman"); 192 193 /* 194 * However, IO ports and Memory truely are global at this level, 195 * as are APIC interrupts (however many IO APICS there turn out 196 * to be on large systems..) 197 */ 198 port_rman.rm_start = 0; 199 port_rman.rm_end = 0xffff; 200 port_rman.rm_type = RMAN_ARRAY; 201 port_rman.rm_descr = "I/O ports"; 202 if (rman_init(&port_rman) 203 || rman_manage_region(&port_rman, 0, 0xffff)) 204 panic("nexus_probe port_rman"); 205 206 mem_rman.rm_start = 0; 207 mem_rman.rm_end = ~0u; 208 mem_rman.rm_type = RMAN_ARRAY; 209 mem_rman.rm_descr = "I/O memory addresses"; 210 if (rman_init(&mem_rman) 211 || rman_manage_region(&mem_rman, 0, ~0)) 212 panic("nexus_probe mem_rman"); 213 214 return bus_generic_probe(dev); 215} 216 217static int 218nexus_attach(device_t dev) 219{ 220 /* 221 * Mask the legacy PICs - we will use the I/O SAPIC for interrupt. 222 */ 223 outb(IO_ICU1+1, 0xff); 224 outb(IO_ICU2+1, 0xff); 225 226 bus_generic_attach(dev); 227 return 0; 228} 229 230static int 231nexus_print_resources(struct resource_list *rl, const char *name, int type, 232 const char *format) 233{ 234 struct resource_list_entry *rle; 235 int printed, retval; 236 237 printed = 0; 238 retval = 0; 239 /* Yes, this is kinda cheating */ 240 SLIST_FOREACH(rle, rl, link) { 241 if (rle->type == type) { 242 if (printed == 0) 243 retval += printf(" %s ", name); 244 else if (printed > 0) 245 retval += printf(","); 246 printed++; 247 retval += printf(format, rle->start); 248 if (rle->count > 1) { 249 retval += printf("-"); 250 retval += printf(format, rle->start + 251 rle->count - 1); 252 } 253 } 254 } 255 return retval; 256} 257 258static int 259nexus_print_all_resources(device_t dev) 260{ 261 struct nexus_device *ndev = DEVTONX(dev); 262 struct resource_list *rl = &ndev->nx_resources; 263 int retval = 0; 264 265 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1) 266 retval += printf(" at"); 267 268 retval += nexus_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 269 retval += nexus_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 270 retval += nexus_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 271 272 return retval; 273} 274 275static int 276nexus_print_child(device_t bus, device_t child) 277{ 278 struct nexus_device *ndev = DEVTONX(child); 279 int retval = 0; 280 281 retval += bus_print_child_header(bus, child); 282 retval += nexus_print_all_resources(child); 283 if (ndev->nx_pcibus != -1) 284 retval += printf(" pcibus %d", ndev->nx_pcibus); 285 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 286 287 return (retval); 288} 289 290static device_t 291nexus_add_child(device_t bus, int order, const char *name, int unit) 292{ 293 device_t child; 294 struct nexus_device *ndev; 295 296 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 297 if (!ndev) 298 return(0); 299 resource_list_init(&ndev->nx_resources); 300 ndev->nx_pcibus = -1; 301 302 child = device_add_child_ordered(bus, order, name, unit); 303 304 /* should we free this in nexus_child_detached? */ 305 device_set_ivars(child, ndev); 306 307 return(child); 308} 309 310static int 311nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 312{ 313 struct nexus_device *ndev = DEVTONX(child); 314 315 switch (which) { 316 case NEXUS_IVAR_PCIBUS: 317 *result = ndev->nx_pcibus; 318 break; 319 default: 320 return ENOENT; 321 } 322 return 0; 323} 324 325 326static int 327nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 328{ 329 struct nexus_device *ndev = DEVTONX(child); 330 331 switch (which) { 332 case NEXUS_IVAR_PCIBUS: 333 ndev->nx_pcibus = value; 334 break; 335 default: 336 return ENOENT; 337 } 338 return 0; 339} 340 341 342/* 343 * Allocate a resource on behalf of child. NB: child is usually going to be a 344 * child of one of our descendants, not a direct child of nexus0. 345 * (Exceptions include npx.) 346 */ 347static struct resource * 348nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 349 u_long start, u_long end, u_long count, u_int flags) 350{ 351 struct nexus_device *ndev = DEVTONX(child); 352 struct resource *rv; 353 struct resource_list_entry *rle; 354 struct rman *rm; 355 int needactivate = flags & RF_ACTIVE; 356 357 /* 358 * If this is an allocation of the "default" range for a given RID, and 359 * we know what the resources for this device are (ie. they aren't maintained 360 * by a child bus), then work out the start/end values. 361 */ 362 if ((start == 0UL) && (end == ~0UL) && (count == 1)) { 363 if (ndev == NULL) 364 return(NULL); 365 rle = resource_list_find(&ndev->nx_resources, type, *rid); 366 if (rle == NULL) 367 return(NULL); 368 start = rle->start; 369 end = rle->end; 370 count = rle->count; 371 } 372 373 flags &= ~RF_ACTIVE; 374 375 switch (type) { 376 case SYS_RES_IRQ: 377 rm = &irq_rman; 378 break; 379 380 case SYS_RES_DRQ: 381 rm = &drq_rman; 382 break; 383 384 case SYS_RES_IOPORT: 385 rm = &port_rman; 386 break; 387 388 case SYS_RES_MEMORY: 389 rm = &mem_rman; 390 break; 391 392 default: 393 return 0; 394 } 395 396 rv = rman_reserve_resource(rm, start, end, count, flags, child); 397 if (rv == 0) 398 return 0; 399 400 if (type == SYS_RES_MEMORY) { 401 rman_set_bustag(rv, IA64_BUS_SPACE_MEM); 402 } else if (type == SYS_RES_IOPORT) { 403 rman_set_bustag(rv, IA64_BUS_SPACE_IO); 404 /* IBM-PC: the type of bus_space_handle_t is u_int */ 405 rman_set_bushandle(rv, rv->r_start); 406 } 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 418static int 419nexus_activate_resource(device_t bus, device_t child, int type, int rid, 420 struct resource *r) 421{ 422 /* 423 * If this is a memory resource, map it into the kernel. 424 */ 425 if (rman_get_bustag(r) == IA64_BUS_SPACE_MEM) { 426 vm_offset_t paddr = rman_get_start(r); 427 vm_offset_t psize = rman_get_size(r); 428 caddr_t vaddr = 0; 429 430 vaddr = pmap_mapdev(paddr, psize); 431 rman_set_virtual(r, vaddr); 432 rman_set_bushandle(r, (bus_space_handle_t) paddr); 433 } 434 return (rman_activate_resource(r)); 435} 436 437static int 438nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 439 struct resource *r) 440{ 441 442 return (rman_deactivate_resource(r)); 443} 444 445static int 446nexus_release_resource(device_t bus, device_t child, int type, int rid, 447 struct resource *r) 448{ 449 if (rman_get_flags(r) & RF_ACTIVE) { 450 int error = bus_deactivate_resource(child, type, rid, r); 451 if (error) 452 return error; 453 } 454 return (rman_release_resource(r)); 455} 456 457/* 458 * Currently this uses the really grody interface from kern/kern_intr.c 459 * (which really doesn't belong in kern/anything.c). Eventually, all of 460 * the code in kern_intr.c and machdep_intr.c should get moved here, since 461 * this is going to be the official interface. 462 */ 463static int 464nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 465 int flags, void (*ihand)(void *), void *arg, void **cookiep) 466{ 467 driver_t *driver; 468 int error; 469 470 /* somebody tried to setup an irq that failed to allocate! */ 471 if (irq == NULL) 472 panic("nexus_setup_intr: NULL irq resource!"); 473 474 *cookiep = 0; 475 if ((irq->r_flags & RF_SHAREABLE) == 0) 476 flags |= INTR_EXCL; 477 478 driver = device_get_driver(child); 479 480 /* 481 * We depend here on rman_activate_resource() being idempotent. 482 */ 483 error = rman_activate_resource(irq); 484 if (error) 485 return (error); 486 487 error = ia64_setup_intr(device_get_nameunit(child), irq->r_start, 488 ihand, arg, flags, cookiep, 0); 489 490 return (error); 491} 492 493static int 494nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 495{ 496#if 0 497 return (inthand_remove(ih)); 498#else 499 return 0; 500#endif 501} 502 503static int 504nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 505{ 506 struct nexus_device *ndev = DEVTONX(child); 507 struct resource_list *rl = &ndev->nx_resources; 508 509 /* XXX this should return a success/failure indicator */ 510 resource_list_add(rl, type, rid, start, start + count - 1, count); 511 return(0); 512} 513 514static int 515nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 516{ 517 struct nexus_device *ndev = DEVTONX(child); 518 struct resource_list *rl = &ndev->nx_resources; 519 struct resource_list_entry *rle; 520 521 rle = resource_list_find(rl, type, rid); 522 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", 523 type, rid, startp, countp, rle); 524 if (!rle) 525 return(ENOENT); 526 if (startp) 527 *startp = rle->start; 528 if (countp) 529 *countp = rle->count; 530 return(0); 531} 532 533static void 534nexus_delete_resource(device_t dev, device_t child, int type, int rid) 535{ 536 struct nexus_device *ndev = DEVTONX(child); 537 struct resource_list *rl = &ndev->nx_resources; 538 539 resource_list_delete(rl, type, rid); 540} 541 542static int 543nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 544 enum intr_polarity pol) 545{ 546 547 return (sapic_config_intr(irq, trig, pol)); 548} 549 550#if 0 551 552/* 553 * Placeholder which claims PnP 'devices' which describe system 554 * resources. 555 */ 556static struct isa_pnp_id sysresource_ids[] = { 557 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 558 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 559 { 0 } 560}; 561 562static int 563sysresource_probe(device_t dev) 564{ 565 int result; 566 567 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 568 device_quiet(dev); 569 } 570 return(result); 571} 572 573static int 574sysresource_attach(device_t dev) 575{ 576 return(0); 577} 578 579static device_method_t sysresource_methods[] = { 580 /* Device interface */ 581 DEVMETHOD(device_probe, sysresource_probe), 582 DEVMETHOD(device_attach, sysresource_attach), 583 DEVMETHOD(device_detach, bus_generic_detach), 584 DEVMETHOD(device_shutdown, bus_generic_shutdown), 585 DEVMETHOD(device_suspend, bus_generic_suspend), 586 DEVMETHOD(device_resume, bus_generic_resume), 587 { 0, 0 } 588}; 589 590static driver_t sysresource_driver = { 591 "sysresource", 592 sysresource_methods, 593 1, /* no softc */ 594}; 595 596static devclass_t sysresource_devclass; 597 598DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 599 600#endif 601