1 /* $OpenBSD: xen.c,v 1.57 2016/07/29 21:27:43 mikeb Exp $ */ 2 3 /* 4 * Copyright (c) 2015 Mike Belopuhov 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 21 /* Xen requires locked atomic operations */ 22 #ifndef MULTIPROCESSOR 23 #define _XENMPATOMICS 24 #define MULTIPROCESSOR 25 #endif 26 #include <sys/atomic.h> 27 #ifdef _XENMPATOMICS 28 #undef MULTIPROCESSOR 29 #undef _XENMPATOMICS 30 #endif 31 32 #include <sys/systm.h> 33 #include <sys/proc.h> 34 #include <sys/signal.h> 35 #include <sys/signalvar.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/task.h> 40 #include <sys/syslog.h> 41 42 #include <machine/bus.h> 43 #include <machine/cpu.h> 44 #include <machine/cpufunc.h> 45 46 #include <uvm/uvm_extern.h> 47 48 #include <machine/i82489var.h> 49 50 #include <dev/rndvar.h> 51 52 #include <dev/pv/pvvar.h> 53 #include <dev/pv/pvreg.h> 54 #include <dev/pv/xenreg.h> 55 #include <dev/pv/xenvar.h> 56 57 struct xen_softc *xen_sc; 58 59 int xen_init_hypercall(struct xen_softc *); 60 int xen_getfeatures(struct xen_softc *); 61 int xen_init_info_page(struct xen_softc *); 62 int xen_init_cbvec(struct xen_softc *); 63 int xen_init_interrupts(struct xen_softc *); 64 int xen_init_grant_tables(struct xen_softc *); 65 struct xen_gntent * 66 xen_grant_table_grow(struct xen_softc *); 67 int xen_grant_table_alloc(struct xen_softc *, grant_ref_t *); 68 void xen_grant_table_free(struct xen_softc *, grant_ref_t); 69 void xen_grant_table_enter(struct xen_softc *, grant_ref_t, paddr_t, 70 int, int); 71 void xen_grant_table_remove(struct xen_softc *, grant_ref_t); 72 void xen_disable_emulated_devices(struct xen_softc *); 73 74 int xen_match(struct device *, void *, void *); 75 void xen_attach(struct device *, struct device *, void *); 76 void xen_deferred(struct device *); 77 void xen_control(void *); 78 void xen_resume(struct device *); 79 int xen_activate(struct device *, int); 80 int xen_probe_devices(struct xen_softc *); 81 82 int xen_bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 83 bus_size_t, int, bus_dmamap_t *); 84 void xen_bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 85 int xen_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 86 struct proc *, int); 87 int xen_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, 88 int); 89 void xen_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 90 void xen_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 91 bus_size_t, int); 92 93 int xs_attach(struct xen_softc *); 94 95 struct cfdriver xen_cd = { 96 NULL, "xen", DV_DULL 97 }; 98 99 const struct cfattach xen_ca = { 100 sizeof(struct xen_softc), xen_match, xen_attach, NULL, xen_activate 101 }; 102 103 struct bus_dma_tag xen_bus_dma_tag = { 104 NULL, 105 xen_bus_dmamap_create, 106 xen_bus_dmamap_destroy, 107 xen_bus_dmamap_load, 108 xen_bus_dmamap_load_mbuf, 109 NULL, 110 NULL, 111 xen_bus_dmamap_unload, 112 xen_bus_dmamap_sync, 113 _bus_dmamem_alloc, 114 NULL, 115 _bus_dmamem_free, 116 _bus_dmamem_map, 117 _bus_dmamem_unmap, 118 NULL, 119 }; 120 121 int 122 xen_match(struct device *parent, void *match, void *aux) 123 { 124 struct pv_attach_args *pva = aux; 125 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_XEN]; 126 127 if (hv->hv_base == 0) 128 return (0); 129 130 return (1); 131 } 132 133 void 134 xen_attach(struct device *parent, struct device *self, void *aux) 135 { 136 struct pv_attach_args *pva = (struct pv_attach_args *)aux; 137 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_XEN]; 138 struct xen_softc *sc = (struct xen_softc *)self; 139 140 sc->sc_base = hv->hv_base; 141 142 if (xen_init_hypercall(sc)) 143 return; 144 145 /* Wire it up to the global */ 146 xen_sc = sc; 147 148 if (xen_getfeatures(sc)) 149 return; 150 151 if (xen_init_info_page(sc)) 152 return; 153 154 xen_init_cbvec(sc); 155 156 if (xen_init_interrupts(sc)) 157 return; 158 159 if (xen_init_grant_tables(sc)) 160 return; 161 162 if (xs_attach(sc)) 163 return; 164 165 xen_probe_devices(sc); 166 167 /* pvbus(4) key/value interface */ 168 hv->hv_kvop = xs_kvop; 169 hv->hv_arg = sc; 170 171 xen_disable_emulated_devices(sc); 172 173 config_mountroot(self, xen_deferred); 174 } 175 176 void 177 xen_deferred(struct device *self) 178 { 179 struct xen_softc *sc = (struct xen_softc *)self; 180 181 if (!(sc->sc_flags & XSF_CBVEC)) { 182 DPRINTF("%s: callback vector hasn't been established\n", 183 sc->sc_dev.dv_xname); 184 return; 185 } 186 187 xen_intr_enable(); 188 189 if (xs_watch(sc, "control", "shutdown", &sc->sc_ctltsk, 190 xen_control, sc)) 191 printf("%s: failed to setup shutdown control watch\n", 192 sc->sc_dev.dv_xname); 193 } 194 195 void 196 xen_control(void *arg) 197 { 198 struct xen_softc *sc = arg; 199 struct xs_transaction xst; 200 char action[128]; 201 int error; 202 203 memset(&xst, 0, sizeof(xst)); 204 xst.xst_id = 0; 205 xst.xst_sc = sc->sc_xs; 206 207 error = xs_getprop(sc, "control", "shutdown", action, sizeof(action)); 208 if (error) { 209 if (error != ENOENT) 210 printf("%s: failed to process control event\n", 211 sc->sc_dev.dv_xname); 212 return; 213 } 214 215 if (strlen(action) == 0) 216 return; 217 218 /* Acknowledge the event */ 219 xs_setprop(sc, "control", "shutdown", "", 0); 220 221 if (strcmp(action, "halt") == 0 || strcmp(action, "poweroff") == 0) { 222 extern int allowpowerdown; 223 224 if (allowpowerdown == 0) 225 return; 226 227 suspend_randomness(); 228 229 log(LOG_KERN | LOG_NOTICE, "Shutting down in response to " 230 "request from Xen host\n"); 231 prsignal(initprocess, SIGUSR2); 232 } else if (strcmp(action, "reboot") == 0) { 233 extern int allowpowerdown; 234 235 if (allowpowerdown == 0) 236 return; 237 238 suspend_randomness(); 239 240 log(LOG_KERN | LOG_NOTICE, "Rebooting in response to request " 241 "from Xen host\n"); 242 prsignal(initprocess, SIGINT); 243 } else if (strcmp(action, "crash") == 0) { 244 panic("xen told us to do this"); 245 } else if (strcmp(action, "suspend") == 0) { 246 /* Not implemented yet */ 247 } else { 248 printf("%s: unknown shutdown event \"%s\"\n", 249 sc->sc_dev.dv_xname, action); 250 } 251 } 252 253 void 254 xen_resume(struct device *self) 255 { 256 } 257 258 int 259 xen_activate(struct device *self, int act) 260 { 261 int rv = 0; 262 263 switch (act) { 264 case DVACT_RESUME: 265 xen_resume(self); 266 break; 267 } 268 return (rv); 269 } 270 271 int 272 xen_init_hypercall(struct xen_softc *sc) 273 { 274 extern void *xen_hypercall_page; 275 uint32_t regs[4]; 276 paddr_t pa; 277 278 /* Get hypercall page configuration MSR */ 279 CPUID(sc->sc_base + CPUID_OFFSET_XEN_HYPERCALL, 280 regs[0], regs[1], regs[2], regs[3]); 281 282 /* We don't support more than one hypercall page */ 283 if (regs[0] != 1) { 284 printf(": requested %d hypercall pages\n", regs[0]); 285 return (-1); 286 } 287 288 sc->sc_hc = &xen_hypercall_page; 289 290 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_hc, &pa)) { 291 printf(": hypercall page PA extraction failed\n"); 292 return (-1); 293 } 294 wrmsr(regs[1], pa); 295 296 return (0); 297 } 298 299 int 300 xen_hypercall(struct xen_softc *sc, int op, int argc, ...) 301 { 302 va_list ap; 303 ulong argv[5]; 304 int i; 305 306 if (argc < 0 || argc > 5) 307 return (-1); 308 va_start(ap, argc); 309 for (i = 0; i < argc; i++) 310 argv[i] = (ulong)va_arg(ap, ulong); 311 return (xen_hypercallv(sc, op, argc, argv)); 312 } 313 314 int 315 xen_hypercallv(struct xen_softc *sc, int op, int argc, ulong *argv) 316 { 317 ulong hcall; 318 int rv = 0; 319 320 hcall = (ulong)sc->sc_hc + op * 32; 321 322 #if defined(XEN_DEBUG) && disabled 323 { 324 int i; 325 326 printf("hypercall %d", op); 327 if (argc > 0) { 328 printf(", args {"); 329 for (i = 0; i < argc; i++) 330 printf(" %#lx", argv[i]); 331 printf(" }\n"); 332 } else 333 printf("\n"); 334 } 335 #endif 336 337 switch (argc) { 338 case 0: { 339 HYPERCALL_RES1; 340 __asm__ volatile ( \ 341 HYPERCALL_LABEL \ 342 : HYPERCALL_OUT1 \ 343 : HYPERCALL_PTR(hcall) \ 344 : HYPERCALL_CLOBBER \ 345 ); 346 HYPERCALL_RET(rv); 347 break; 348 } 349 case 1: { 350 HYPERCALL_RES1; HYPERCALL_RES2; 351 HYPERCALL_ARG1(argv[0]); 352 __asm__ volatile ( \ 353 HYPERCALL_LABEL \ 354 : HYPERCALL_OUT1 HYPERCALL_OUT2 \ 355 : HYPERCALL_IN1 \ 356 , HYPERCALL_PTR(hcall) \ 357 : HYPERCALL_CLOBBER \ 358 ); 359 HYPERCALL_RET(rv); 360 break; 361 } 362 case 2: { 363 HYPERCALL_RES1; HYPERCALL_RES2; HYPERCALL_RES3; 364 HYPERCALL_ARG1(argv[0]); HYPERCALL_ARG2(argv[1]); 365 __asm__ volatile ( \ 366 HYPERCALL_LABEL \ 367 : HYPERCALL_OUT1 HYPERCALL_OUT2 \ 368 HYPERCALL_OUT3 \ 369 : HYPERCALL_IN1 HYPERCALL_IN2 \ 370 , HYPERCALL_PTR(hcall) \ 371 : HYPERCALL_CLOBBER \ 372 ); 373 HYPERCALL_RET(rv); 374 break; 375 } 376 case 3: { 377 HYPERCALL_RES1; HYPERCALL_RES2; HYPERCALL_RES3; 378 HYPERCALL_RES4; 379 HYPERCALL_ARG1(argv[0]); HYPERCALL_ARG2(argv[1]); 380 HYPERCALL_ARG3(argv[2]); 381 __asm__ volatile ( \ 382 HYPERCALL_LABEL \ 383 : HYPERCALL_OUT1 HYPERCALL_OUT2 \ 384 HYPERCALL_OUT3 HYPERCALL_OUT4 \ 385 : HYPERCALL_IN1 HYPERCALL_IN2 \ 386 HYPERCALL_IN3 \ 387 , HYPERCALL_PTR(hcall) \ 388 : HYPERCALL_CLOBBER \ 389 ); 390 HYPERCALL_RET(rv); 391 break; 392 } 393 case 4: { 394 HYPERCALL_RES1; HYPERCALL_RES2; HYPERCALL_RES3; 395 HYPERCALL_RES4; HYPERCALL_RES5; 396 HYPERCALL_ARG1(argv[0]); HYPERCALL_ARG2(argv[1]); 397 HYPERCALL_ARG3(argv[2]); HYPERCALL_ARG4(argv[3]); 398 __asm__ volatile ( \ 399 HYPERCALL_LABEL \ 400 : HYPERCALL_OUT1 HYPERCALL_OUT2 \ 401 HYPERCALL_OUT3 HYPERCALL_OUT4 \ 402 HYPERCALL_OUT5 \ 403 : HYPERCALL_IN1 HYPERCALL_IN2 \ 404 HYPERCALL_IN3 HYPERCALL_IN4 \ 405 , HYPERCALL_PTR(hcall) \ 406 : HYPERCALL_CLOBBER \ 407 ); 408 HYPERCALL_RET(rv); 409 break; 410 } 411 case 5: { 412 HYPERCALL_RES1; HYPERCALL_RES2; HYPERCALL_RES3; 413 HYPERCALL_RES4; HYPERCALL_RES5; HYPERCALL_RES6; 414 HYPERCALL_ARG1(argv[0]); HYPERCALL_ARG2(argv[1]); 415 HYPERCALL_ARG3(argv[2]); HYPERCALL_ARG4(argv[3]); 416 HYPERCALL_ARG5(argv[4]); 417 __asm__ volatile ( \ 418 HYPERCALL_LABEL \ 419 : HYPERCALL_OUT1 HYPERCALL_OUT2 \ 420 HYPERCALL_OUT3 HYPERCALL_OUT4 \ 421 HYPERCALL_OUT5 HYPERCALL_OUT6 \ 422 : HYPERCALL_IN1 HYPERCALL_IN2 \ 423 HYPERCALL_IN3 HYPERCALL_IN4 \ 424 HYPERCALL_IN5 \ 425 , HYPERCALL_PTR(hcall) \ 426 : HYPERCALL_CLOBBER \ 427 ); 428 HYPERCALL_RET(rv); 429 break; 430 } 431 default: 432 DPRINTF("%s: wrong number of arguments: %d\n", __func__, argc); 433 rv = -1; 434 break; 435 } 436 return (rv); 437 } 438 439 int 440 xen_getfeatures(struct xen_softc *sc) 441 { 442 struct xen_feature_info xfi; 443 444 memset(&xfi, 0, sizeof(xfi)); 445 if (xen_hypercall(sc, XC_VERSION, 2, XENVER_get_features, &xfi) < 0) { 446 printf(": failed to fetch features\n"); 447 return (-1); 448 } 449 sc->sc_features = xfi.submap; 450 #ifdef XEN_DEBUG 451 printf(": features %b", sc->sc_features, 452 "\20\014DOM0\013PIRQ\012PVCLOCK\011CBVEC\010GNTFLAGS\007HMA" 453 "\006PTUPD\005PAE4G\004SUPERVISOR\003AUTOPMAP\002WDT\001WPT"); 454 #else 455 printf(": features %#x", sc->sc_features); 456 #endif 457 return (0); 458 } 459 460 #ifdef XEN_DEBUG 461 void 462 xen_print_info_page(void) 463 { 464 struct xen_softc *sc = xen_sc; 465 struct shared_info *s = sc->sc_ipg; 466 struct vcpu_info *v; 467 int i; 468 469 virtio_membar_sync(); 470 for (i = 0; i < XEN_LEGACY_MAX_VCPUS; i++) { 471 v = &s->vcpu_info[i]; 472 if (!v->evtchn_upcall_pending && !v->evtchn_upcall_mask && 473 !v->evtchn_pending_sel && !v->time.version && 474 !v->time.tsc_timestamp && !v->time.system_time && 475 !v->time.tsc_to_system_mul && !v->time.tsc_shift) 476 continue; 477 printf("vcpu%d:\n" 478 " upcall_pending=%02x upcall_mask=%02x pending_sel=%#lx\n" 479 " time version=%u tsc=%llu system=%llu\n" 480 " time mul=%u shift=%d\n", 481 i, v->evtchn_upcall_pending, v->evtchn_upcall_mask, 482 v->evtchn_pending_sel, v->time.version, 483 v->time.tsc_timestamp, v->time.system_time, 484 v->time.tsc_to_system_mul, v->time.tsc_shift); 485 } 486 printf("pending events: "); 487 for (i = 0; i < nitems(s->evtchn_pending); i++) { 488 if (s->evtchn_pending[i] == 0) 489 continue; 490 printf(" %d:%#lx", i, s->evtchn_pending[i]); 491 } 492 printf("\nmasked events: "); 493 for (i = 0; i < nitems(s->evtchn_mask); i++) { 494 if (s->evtchn_mask[i] == 0xffffffffffffffffULL) 495 continue; 496 printf(" %d:%#lx", i, s->evtchn_mask[i]); 497 } 498 printf("\nwc ver=%u sec=%u nsec=%u\n", s->wc_version, s->wc_sec, 499 s->wc_nsec); 500 printf("arch maxpfn=%lu framelist=%lu nmi=%lu\n", s->arch.max_pfn, 501 s->arch.pfn_to_mfn_frame_list, s->arch.nmi_reason); 502 } 503 #endif /* XEN_DEBUG */ 504 505 int 506 xen_init_info_page(struct xen_softc *sc) 507 { 508 struct xen_add_to_physmap xatp; 509 paddr_t pa; 510 511 sc->sc_ipg = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT | M_ZERO); 512 if (sc->sc_ipg == NULL) { 513 printf(": failed to allocate shared info page\n"); 514 return (-1); 515 } 516 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_ipg, &pa)) { 517 printf(": shared info page PA extraction failed\n"); 518 free(sc->sc_ipg, M_DEVBUF, PAGE_SIZE); 519 return (-1); 520 } 521 xatp.domid = DOMID_SELF; 522 xatp.idx = 0; 523 xatp.space = XENMAPSPACE_shared_info; 524 xatp.gpfn = atop(pa); 525 if (xen_hypercall(sc, XC_MEMORY, 2, XENMEM_add_to_physmap, &xatp)) { 526 printf(": failed to register shared info page\n"); 527 free(sc->sc_ipg, M_DEVBUF, PAGE_SIZE); 528 return (-1); 529 } 530 return (0); 531 } 532 533 int 534 xen_init_cbvec(struct xen_softc *sc) 535 { 536 struct xen_hvm_param xhp; 537 538 if ((sc->sc_features & XENFEAT_CBVEC) == 0) 539 return (ENOENT); 540 541 xhp.domid = DOMID_SELF; 542 xhp.index = HVM_PARAM_CALLBACK_IRQ; 543 xhp.value = HVM_CALLBACK_VECTOR(LAPIC_XEN_VECTOR); 544 if (xen_hypercall(sc, XC_HVM, 2, HVMOP_set_param, &xhp)) { 545 /* Will retry with the xspd(4) PCI interrupt */ 546 return (ENOENT); 547 } 548 DPRINTF(", idtvec %d", LAPIC_XEN_VECTOR); 549 550 sc->sc_flags |= XSF_CBVEC; 551 552 return (0); 553 } 554 555 int 556 xen_init_interrupts(struct xen_softc *sc) 557 { 558 int i; 559 560 sc->sc_irq = LAPIC_XEN_VECTOR; 561 562 /* 563 * Clear all pending events and mask all interrupts 564 */ 565 for (i = 0; i < nitems(sc->sc_ipg->evtchn_pending); i++) { 566 sc->sc_ipg->evtchn_pending[i] = 0; 567 sc->sc_ipg->evtchn_mask[i] = ~0UL; 568 } 569 570 SLIST_INIT(&sc->sc_intrs); 571 572 return (0); 573 } 574 575 static int 576 xen_evtchn_hypercall(struct xen_softc *sc, int cmd, void *arg, size_t len) 577 { 578 struct evtchn_op compat; 579 int error; 580 581 error = xen_hypercall(sc, XC_EVTCHN, 2, cmd, arg); 582 if (error == -ENOXENSYS) { 583 memset(&compat, 0, sizeof(compat)); 584 compat.cmd = cmd; 585 memcpy(&compat.u, arg, len); 586 error = xen_hypercall(sc, XC_OEVTCHN, 1, &compat); 587 } 588 return (error); 589 } 590 591 static inline struct xen_intsrc * 592 xen_lookup_intsrc(struct xen_softc *sc, evtchn_port_t port) 593 { 594 struct xen_intsrc *xi; 595 596 SLIST_FOREACH(xi, &sc->sc_intrs, xi_entry) 597 if (xi->xi_port == port) 598 break; 599 return (xi); 600 } 601 602 void 603 xen_intr_ack(void) 604 { 605 struct xen_softc *sc = xen_sc; 606 struct shared_info *s = sc->sc_ipg; 607 struct cpu_info *ci = curcpu(); 608 struct vcpu_info *v = &s->vcpu_info[CPU_INFO_UNIT(ci)]; 609 610 v->evtchn_upcall_pending = 0; 611 virtio_membar_sync(); 612 } 613 614 void 615 xen_intr(void) 616 { 617 struct xen_softc *sc = xen_sc; 618 struct xen_intsrc *xi; 619 struct shared_info *s = sc->sc_ipg; 620 struct cpu_info *ci = curcpu(); 621 struct vcpu_info *v = &s->vcpu_info[CPU_INFO_UNIT(ci)]; 622 ulong pending, selector; 623 int port, bit, row; 624 625 v->evtchn_upcall_pending = 0; 626 selector = atomic_swap_ulong(&v->evtchn_pending_sel, 0); 627 628 for (row = 0; selector > 0; selector >>= 1, row++) { 629 if ((selector & 1) == 0) 630 continue; 631 pending = sc->sc_ipg->evtchn_pending[row] & 632 ~(sc->sc_ipg->evtchn_mask[row]); 633 for (bit = 0; pending > 0; pending >>= 1, bit++) { 634 if ((pending & 1) == 0) 635 continue; 636 sc->sc_ipg->evtchn_pending[row] &= ~(1 << bit); 637 virtio_membar_producer(); 638 port = (row * LONG_BIT) + bit; 639 if ((xi = xen_lookup_intsrc(sc, port)) == NULL) { 640 printf("%s: unhandled interrupt on port %u\n", 641 sc->sc_dev.dv_xname, port); 642 continue; 643 } 644 xi->xi_evcnt.ec_count++; 645 task_add(xi->xi_taskq, &xi->xi_task); 646 } 647 } 648 } 649 650 void 651 xen_intr_schedule(xen_intr_handle_t xih) 652 { 653 struct xen_softc *sc = xen_sc; 654 struct xen_intsrc *xi; 655 656 if ((xi = xen_lookup_intsrc(sc, (evtchn_port_t)xih)) != NULL) 657 task_add(xi->xi_taskq, &xi->xi_task); 658 } 659 660 void 661 xen_intr_signal(xen_intr_handle_t xih) 662 { 663 struct xen_softc *sc = xen_sc; 664 struct xen_intsrc *xi; 665 struct evtchn_send es; 666 667 if ((xi = xen_lookup_intsrc(sc, (evtchn_port_t)xih)) != NULL) { 668 es.port = xi->xi_port; 669 xen_evtchn_hypercall(sc, EVTCHNOP_send, &es, sizeof(es)); 670 } 671 } 672 673 int 674 xen_intr_establish(evtchn_port_t port, xen_intr_handle_t *xih, int domain, 675 void (*handler)(void *), void *arg, char *name) 676 { 677 struct xen_softc *sc = xen_sc; 678 struct xen_intsrc *xi; 679 struct evtchn_alloc_unbound eau; 680 #ifdef notyet 681 struct evtchn_bind_vcpu ebv; 682 #endif 683 #if defined(XEN_DEBUG) && disabled 684 struct evtchn_status es; 685 #endif 686 687 if (port && xen_lookup_intsrc(sc, port)) { 688 DPRINTF("%s: interrupt handler has already been established " 689 "for port %u\n", sc->sc_dev.dv_xname, port); 690 return (-1); 691 } 692 693 xi = malloc(sizeof(*xi), M_DEVBUF, M_NOWAIT | M_ZERO); 694 if (xi == NULL) 695 return (-1); 696 697 xi->xi_port = (evtchn_port_t)*xih; 698 699 xi->xi_taskq = taskq_create(name, 1, IPL_NET, TASKQ_MPSAFE); 700 if (!xi->xi_taskq) { 701 printf("%s: failed to create interrupt task for %s\n", 702 sc->sc_dev.dv_xname, name); 703 free(xi, M_DEVBUF, sizeof(*xi)); 704 return (-1); 705 } 706 task_set(&xi->xi_task, handler, arg); 707 708 if (port == 0) { 709 /* We're being asked to allocate a new event port */ 710 memset(&eau, 0, sizeof(eau)); 711 eau.dom = DOMID_SELF; 712 eau.remote_dom = domain; 713 if (xen_evtchn_hypercall(sc, EVTCHNOP_alloc_unbound, &eau, 714 sizeof(eau)) != 0) { 715 DPRINTF("%s: failed to allocate new event port\n", 716 sc->sc_dev.dv_xname); 717 free(xi, M_DEVBUF, sizeof(*xi)); 718 return (-1); 719 } 720 *xih = xi->xi_port = eau.port; 721 } else { 722 *xih = xi->xi_port = port; 723 /* 724 * The Event Channel API didn't open this port, so it is not 725 * responsible for closing it automatically on unbind. 726 */ 727 xi->xi_noclose = 1; 728 } 729 730 #ifdef notyet 731 /* Bind interrupt to VCPU#0 */ 732 memset(&ebv, 0, sizeof(ebv)); 733 ebv.port = xi->xi_port; 734 ebv.vcpu = 0; 735 if (xen_evtchn_hypercall(sc, EVTCHNOP_bind_vcpu, &ebv, sizeof(ebv))) { 736 printf("%s: failed to bind interrupt on port %u to vcpu%d\n", 737 sc->sc_dev.dv_xname, ebv.port, ebv.vcpu); 738 } 739 #endif 740 741 evcount_attach(&xi->xi_evcnt, name, &sc->sc_irq); 742 743 SLIST_INSERT_HEAD(&sc->sc_intrs, xi, xi_entry); 744 745 /* Mask the event port */ 746 setbit((char *)&sc->sc_ipg->evtchn_mask[0], xi->xi_port); 747 748 #if defined(XEN_DEBUG) && disabled 749 memset(&es, 0, sizeof(es)); 750 es.dom = DOMID_SELF; 751 es.port = xi->xi_port; 752 if (xen_evtchn_hypercall(sc, EVTCHNOP_status, &es, sizeof(es))) { 753 printf("%s: failed to obtain status for port %d\n", 754 sc->sc_dev.dv_xname, es.port); 755 } 756 printf("%s: port %u bound to vcpu%u", sc->sc_dev.dv_xname, 757 es.port, es.vcpu); 758 if (es.status == EVTCHNSTAT_interdomain) 759 printf(": domain %d port %u\n", es.u.interdomain.dom, 760 es.u.interdomain.port); 761 else if (es.status == EVTCHNSTAT_unbound) 762 printf(": domain %d\n", es.u.unbound.dom); 763 else if (es.status == EVTCHNSTAT_pirq) 764 printf(": pirq %u\n", es.u.pirq); 765 else if (es.status == EVTCHNSTAT_virq) 766 printf(": virq %u\n", es.u.virq); 767 else 768 printf("\n"); 769 #endif 770 771 return (0); 772 } 773 774 int 775 xen_intr_disestablish(xen_intr_handle_t xih) 776 { 777 struct xen_softc *sc = xen_sc; 778 evtchn_port_t port = (evtchn_port_t)xih; 779 struct evtchn_close ec; 780 struct xen_intsrc *xi; 781 782 if ((xi = xen_lookup_intsrc(sc, port)) == NULL) 783 return (-1); 784 785 evcount_detach(&xi->xi_evcnt); 786 787 SLIST_REMOVE(&sc->sc_intrs, xi, xen_intsrc, xi_entry); 788 789 setbit((char *)&sc->sc_ipg->evtchn_mask[0], xi->xi_port); 790 clrbit((char *)&sc->sc_ipg->evtchn_pending[0], xi->xi_port); 791 virtio_membar_sync(); 792 793 if (!xi->xi_noclose) { 794 ec.port = xi->xi_port; 795 if (xen_evtchn_hypercall(sc, EVTCHNOP_close, &ec, sizeof(ec))) { 796 DPRINTF("%s: failed to close event port %u\n", 797 sc->sc_dev.dv_xname, xi->xi_port); 798 } 799 } 800 801 free(xi, M_DEVBUF, sizeof(*xi)); 802 return (0); 803 } 804 805 void 806 xen_intr_enable(void) 807 { 808 struct xen_softc *sc = xen_sc; 809 struct xen_intsrc *xi; 810 struct evtchn_unmask eu; 811 812 SLIST_FOREACH(xi, &sc->sc_intrs, xi_entry) { 813 if (!xi->xi_masked) { 814 eu.port = xi->xi_port; 815 if (xen_evtchn_hypercall(sc, EVTCHNOP_unmask, &eu, 816 sizeof(eu))) 817 printf("%s: unmasking port %u failed\n", 818 sc->sc_dev.dv_xname, xi->xi_port); 819 virtio_membar_sync(); 820 if (isset((char *)&sc->sc_ipg->evtchn_mask[0], 821 xi->xi_port)) 822 printf("%s: port %u is still masked\n", 823 sc->sc_dev.dv_xname, xi->xi_port); 824 } 825 } 826 } 827 828 void 829 xen_intr_mask(xen_intr_handle_t xih) 830 { 831 struct xen_softc *sc = xen_sc; 832 evtchn_port_t port = (evtchn_port_t)xih; 833 struct xen_intsrc *xi; 834 835 if ((xi = xen_lookup_intsrc(sc, port)) != NULL) { 836 xi->xi_masked = 1; 837 setbit((char *)&sc->sc_ipg->evtchn_mask[0], xi->xi_port); 838 virtio_membar_sync(); 839 } 840 } 841 842 int 843 xen_intr_unmask(xen_intr_handle_t xih) 844 { 845 struct xen_softc *sc = xen_sc; 846 evtchn_port_t port = (evtchn_port_t)xih; 847 struct xen_intsrc *xi; 848 struct evtchn_unmask eu; 849 850 if ((xi = xen_lookup_intsrc(sc, port)) != NULL) { 851 xi->xi_masked = 0; 852 if (!isset((char *)&sc->sc_ipg->evtchn_mask[0], xi->xi_port)) 853 return (0); 854 eu.port = xi->xi_port; 855 return (xen_evtchn_hypercall(sc, EVTCHNOP_unmask, &eu, 856 sizeof(eu))); 857 } 858 return (0); 859 } 860 861 int 862 xen_init_grant_tables(struct xen_softc *sc) 863 { 864 struct gnttab_query_size gqs; 865 866 gqs.dom = DOMID_SELF; 867 if (xen_hypercall(sc, XC_GNTTAB, 3, GNTTABOP_query_size, &gqs, 1)) { 868 printf(": failed the query for grant table pages\n"); 869 return (-1); 870 } 871 if (gqs.nr_frames == 0 || gqs.nr_frames > gqs.max_nr_frames) { 872 printf(": invalid number of grant table pages: %u/%u\n", 873 gqs.nr_frames, gqs.max_nr_frames); 874 return (-1); 875 } 876 877 sc->sc_gntmax = gqs.max_nr_frames; 878 879 sc->sc_gnt = mallocarray(sc->sc_gntmax + 1, sizeof(struct xen_gntent), 880 M_DEVBUF, M_ZERO | M_NOWAIT); 881 if (sc->sc_gnt == NULL) { 882 printf(": failed to allocate grant table lookup table\n"); 883 return (-1); 884 } 885 886 mtx_init(&sc->sc_gntmtx, IPL_NET); 887 888 if (xen_grant_table_grow(sc) == NULL) { 889 free(sc->sc_gnt, M_DEVBUF, sc->sc_gntmax * 890 sizeof(struct xen_gntent)); 891 return (-1); 892 } 893 894 printf(", %u grant table frames", sc->sc_gntmax); 895 896 xen_bus_dma_tag._cookie = sc; 897 898 return (0); 899 } 900 901 struct xen_gntent * 902 xen_grant_table_grow(struct xen_softc *sc) 903 { 904 struct xen_add_to_physmap xatp; 905 struct xen_gntent *ge; 906 paddr_t pa; 907 908 if (sc->sc_gntcnt == sc->sc_gntmax) { 909 printf("%s: grant table frame allotment limit reached\n", 910 sc->sc_dev.dv_xname); 911 return (NULL); 912 } 913 914 mtx_enter(&sc->sc_gntmtx); 915 916 ge = &sc->sc_gnt[sc->sc_gntcnt]; 917 ge->ge_table = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 918 if (ge->ge_table == NULL) { 919 free(ge, M_DEVBUF, sizeof(*ge)); 920 mtx_leave(&sc->sc_gntmtx); 921 return (NULL); 922 } 923 if (!pmap_extract(pmap_kernel(), (vaddr_t)ge->ge_table, &pa)) { 924 printf("%s: grant table page PA extraction failed\n", 925 sc->sc_dev.dv_xname); 926 km_free(ge->ge_table, PAGE_SIZE, &kv_any, &kp_zero); 927 free(ge, M_DEVBUF, sizeof(*ge)); 928 mtx_leave(&sc->sc_gntmtx); 929 return (NULL); 930 } 931 xatp.domid = DOMID_SELF; 932 xatp.idx = sc->sc_gntcnt; 933 xatp.space = XENMAPSPACE_grant_table; 934 xatp.gpfn = atop(pa); 935 if (xen_hypercall(sc, XC_MEMORY, 2, XENMEM_add_to_physmap, &xatp)) { 936 printf("%s: failed to add a grant table page\n", 937 sc->sc_dev.dv_xname); 938 km_free(ge->ge_table, PAGE_SIZE, &kv_any, &kp_zero); 939 free(ge, M_DEVBUF, sizeof(*ge)); 940 mtx_leave(&sc->sc_gntmtx); 941 return (NULL); 942 } 943 ge->ge_start = sc->sc_gntcnt * GNTTAB_NEPG; 944 /* First page has 8 reserved entries */ 945 ge->ge_reserved = ge->ge_start == 0 ? GNTTAB_NR_RESERVED_ENTRIES : 0; 946 ge->ge_free = GNTTAB_NEPG - ge->ge_reserved; 947 ge->ge_next = ge->ge_reserved; 948 mtx_init(&ge->ge_mtx, IPL_NET); 949 950 sc->sc_gntcnt++; 951 mtx_leave(&sc->sc_gntmtx); 952 953 return (ge); 954 } 955 956 int 957 xen_grant_table_alloc(struct xen_softc *sc, grant_ref_t *ref) 958 { 959 struct xen_gntent *ge; 960 int i; 961 962 /* Start with a previously allocated table page */ 963 ge = &sc->sc_gnt[sc->sc_gntcnt - 1]; 964 if (ge->ge_free > 0) { 965 mtx_enter(&ge->ge_mtx); 966 if (ge->ge_free > 0) 967 goto search; 968 mtx_leave(&ge->ge_mtx); 969 } 970 971 /* Try other existing table pages */ 972 for (i = 0; i < sc->sc_gntcnt; i++) { 973 ge = &sc->sc_gnt[i]; 974 if (ge->ge_free == 0) 975 continue; 976 mtx_enter(&ge->ge_mtx); 977 if (ge->ge_free > 0) 978 goto search; 979 mtx_leave(&ge->ge_mtx); 980 } 981 982 alloc: 983 /* Allocate a new table page */ 984 if ((ge = xen_grant_table_grow(sc)) == NULL) 985 return (-1); 986 987 mtx_enter(&ge->ge_mtx); 988 if (ge->ge_free == 0) { 989 /* We were not fast enough... */ 990 mtx_leave(&ge->ge_mtx); 991 goto alloc; 992 } 993 994 search: 995 for (i = ge->ge_next; 996 /* Math works here because GNTTAB_NEPG is a power of 2 */ 997 i != ((ge->ge_next + GNTTAB_NEPG - 1) & (GNTTAB_NEPG - 1)); 998 i++) { 999 if (i == GNTTAB_NEPG) 1000 i = 0; 1001 if (ge->ge_reserved && i < ge->ge_reserved) 1002 continue; 1003 if (ge->ge_table[i].flags != GTF_invalid && 1004 ge->ge_table[i].frame != 0) 1005 continue; 1006 *ref = ge->ge_start + i; 1007 /* XXX Mark as taken */ 1008 ge->ge_table[i].frame = 0xffffffff; 1009 if ((ge->ge_next = i + 1) == GNTTAB_NEPG) 1010 ge->ge_next = ge->ge_reserved; 1011 ge->ge_free--; 1012 mtx_leave(&ge->ge_mtx); 1013 return (0); 1014 } 1015 mtx_leave(&ge->ge_mtx); 1016 1017 panic("page full, sc %p gnt %p (%d) ge %p", sc, sc->sc_gnt, 1018 sc->sc_gntcnt, ge); 1019 return (-1); 1020 } 1021 1022 void 1023 xen_grant_table_free(struct xen_softc *sc, grant_ref_t ref) 1024 { 1025 struct xen_gntent *ge; 1026 1027 #ifdef XEN_DEBUG 1028 if (ref > sc->sc_gntcnt * GNTTAB_NEPG) 1029 panic("unmanaged ref %u sc %p gnt %p (%d)", ref, sc, 1030 sc->sc_gnt, sc->sc_gntcnt); 1031 #endif 1032 ge = &sc->sc_gnt[ref / GNTTAB_NEPG]; 1033 mtx_enter(&ge->ge_mtx); 1034 #ifdef XEN_DEBUG 1035 if (ref < ge->ge_start || ref > ge->ge_start + GNTTAB_NEPG) { 1036 mtx_leave(&ge->ge_mtx); 1037 panic("out of bounds ref %u ge %p start %u sc %p gnt %p", 1038 ref, ge, ge->ge_start, sc, sc->sc_gnt); 1039 } 1040 #endif 1041 ref -= ge->ge_start; 1042 if (ge->ge_table[ref].flags != GTF_invalid) { 1043 mtx_leave(&ge->ge_mtx); 1044 #ifdef XEN_DEBUG 1045 panic("ref %u is still in use, sc %p gnt %p", ref + 1046 ge->ge_start, sc, sc->sc_gnt); 1047 #else 1048 printf("%s: reference %u is still in use\n", 1049 sc->sc_dev.dv_xname, ref + ge->ge_start); 1050 #endif 1051 } 1052 ge->ge_table[ref].frame = 0; 1053 ge->ge_next = ref; 1054 ge->ge_free++; 1055 mtx_leave(&ge->ge_mtx); 1056 } 1057 1058 void 1059 xen_grant_table_enter(struct xen_softc *sc, grant_ref_t ref, paddr_t pa, 1060 int domain, int flags) 1061 { 1062 struct xen_gntent *ge; 1063 1064 #ifdef XEN_DEBUG 1065 if (ref > sc->sc_gntcnt * GNTTAB_NEPG) 1066 panic("unmanaged ref %u sc %p gnt %p (%d)", ref, sc, 1067 sc->sc_gnt, sc->sc_gntcnt); 1068 #endif 1069 ge = &sc->sc_gnt[ref / GNTTAB_NEPG]; 1070 #ifdef XEN_DEBUG 1071 if (ref < ge->ge_start || ref > ge->ge_start + GNTTAB_NEPG) { 1072 panic("out of bounds ref %u ge %p start %u sc %p gnt %p", 1073 ref, ge, ge->ge_start, sc, sc->sc_gnt); 1074 } 1075 #endif 1076 ref -= ge->ge_start; 1077 ge->ge_table[ref].frame = atop(pa); 1078 ge->ge_table[ref].domid = domain; 1079 virtio_membar_sync(); 1080 ge->ge_table[ref].flags = GTF_permit_access | flags; 1081 virtio_membar_sync(); 1082 } 1083 1084 void 1085 xen_grant_table_remove(struct xen_softc *sc, grant_ref_t ref) 1086 { 1087 struct xen_gntent *ge; 1088 uint32_t flags, *ptr; 1089 int loop; 1090 1091 #ifdef XEN_DEBUG 1092 if (ref > sc->sc_gntcnt * GNTTAB_NEPG) 1093 panic("unmanaged ref %u sc %p gnt %p (%d)", ref, sc, 1094 sc->sc_gnt, sc->sc_gntcnt); 1095 #endif 1096 ge = &sc->sc_gnt[ref / GNTTAB_NEPG]; 1097 #ifdef XEN_DEBUG 1098 if (ref < ge->ge_start || ref > ge->ge_start + GNTTAB_NEPG) { 1099 panic("out of bounds ref %u ge %p start %u sc %p gnt %p", 1100 ref, ge, ge->ge_start, sc, sc->sc_gnt); 1101 } 1102 #endif 1103 ref -= ge->ge_start; 1104 /* Invalidate the grant reference */ 1105 virtio_membar_sync(); 1106 ptr = (uint32_t *)&ge->ge_table[ref]; 1107 flags = (ge->ge_table[ref].flags & ~(GTF_reading|GTF_writing)) | 1108 (ge->ge_table[ref].domid << 16); 1109 loop = 0; 1110 while (atomic_cas_uint(ptr, flags, GTF_invalid) != flags) { 1111 if (loop++ > 10000000) { 1112 printf("%s: grant table reference %u is held " 1113 "by domain %d\n", sc->sc_dev.dv_xname, ref + 1114 ge->ge_start, ge->ge_table[ref].domid); 1115 return; 1116 } 1117 CPU_BUSY_CYCLE(); 1118 } 1119 ge->ge_table[ref].frame = 0xffffffff; 1120 } 1121 1122 int 1123 xen_bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments, 1124 bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp) 1125 { 1126 struct xen_softc *sc = t->_cookie; 1127 struct xen_gntmap *gm; 1128 int i, error; 1129 1130 if (maxsegsz < PAGE_SIZE) 1131 return (EINVAL); 1132 1133 /* Allocate a dma map structure */ 1134 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, 1135 flags, dmamp); 1136 if (error) 1137 return (error); 1138 /* Allocate an array of grant table pa<->ref maps */ 1139 gm = mallocarray(nsegments, sizeof(struct xen_gntmap), M_DEVBUF, 1140 M_ZERO | ((flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)); 1141 if (gm == NULL) { 1142 _bus_dmamap_destroy(t, *dmamp); 1143 *dmamp = NULL; 1144 return (ENOMEM); 1145 } 1146 /* Wire it to the dma map */ 1147 (*dmamp)->_dm_cookie = gm; 1148 /* Claim references from the grant table */ 1149 for (i = 0; i < (*dmamp)->_dm_segcnt; i++) { 1150 if (xen_grant_table_alloc(sc, &gm[i].gm_ref)) { 1151 xen_bus_dmamap_destroy(t, *dmamp); 1152 *dmamp = NULL; 1153 return (ENOBUFS); 1154 } 1155 } 1156 return (0); 1157 } 1158 1159 void 1160 xen_bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map) 1161 { 1162 struct xen_softc *sc = t->_cookie; 1163 struct xen_gntmap *gm; 1164 int i; 1165 1166 gm = map->_dm_cookie; 1167 for (i = 0; i < map->_dm_segcnt; i++) { 1168 if (gm[i].gm_ref == 0) 1169 continue; 1170 xen_grant_table_free(sc, gm[i].gm_ref); 1171 } 1172 free(gm, M_DEVBUF, map->_dm_segcnt * sizeof(struct xen_gntmap)); 1173 _bus_dmamap_destroy(t, map); 1174 } 1175 1176 int 1177 xen_bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 1178 bus_size_t buflen, struct proc *p, int flags) 1179 { 1180 struct xen_softc *sc = t->_cookie; 1181 struct xen_gntmap *gm = map->_dm_cookie; 1182 int i, domain, error; 1183 1184 domain = flags >> 16; 1185 flags &= 0xffff; 1186 error = _bus_dmamap_load(t, map, buf, buflen, p, flags); 1187 if (error) 1188 return (error); 1189 for (i = 0; i < map->dm_nsegs; i++) { 1190 xen_grant_table_enter(sc, gm[i].gm_ref, map->dm_segs[i].ds_addr, 1191 domain, flags & BUS_DMA_WRITE ? GTF_readonly : 0); 1192 gm[i].gm_paddr = map->dm_segs[i].ds_addr; 1193 map->dm_segs[i].ds_addr = gm[i].gm_ref; 1194 } 1195 return (0); 1196 } 1197 1198 int 1199 xen_bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0, 1200 int flags) 1201 { 1202 struct xen_softc *sc = t->_cookie; 1203 struct xen_gntmap *gm = map->_dm_cookie; 1204 int i, domain, error; 1205 1206 domain = flags >> 16; 1207 flags &= 0xffff; 1208 error = _bus_dmamap_load_mbuf(t, map, m0, flags); 1209 if (error) 1210 return (error); 1211 for (i = 0; i < map->dm_nsegs; i++) { 1212 xen_grant_table_enter(sc, gm[i].gm_ref, map->dm_segs[i].ds_addr, 1213 domain, flags & BUS_DMA_WRITE ? GTF_readonly : 0); 1214 gm[i].gm_paddr = map->dm_segs[i].ds_addr; 1215 map->dm_segs[i].ds_addr = gm[i].gm_ref; 1216 } 1217 return (0); 1218 } 1219 1220 void 1221 xen_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 1222 { 1223 struct xen_softc *sc = t->_cookie; 1224 struct xen_gntmap *gm = map->_dm_cookie; 1225 int i; 1226 1227 for (i = 0; i < map->dm_nsegs; i++) { 1228 if (gm[i].gm_paddr == 0) 1229 continue; 1230 xen_grant_table_remove(sc, gm[i].gm_ref); 1231 map->dm_segs[i].ds_addr = gm[i].gm_paddr; 1232 gm[i].gm_paddr = 0; 1233 } 1234 _bus_dmamap_unload(t, map); 1235 } 1236 1237 void 1238 xen_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t addr, 1239 bus_size_t size, int op) 1240 { 1241 if ((op == (BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE)) || 1242 (op == (BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE))) 1243 virtio_membar_sync(); 1244 } 1245 1246 static int 1247 atoi(char *cp, int *res) 1248 { 1249 *res = 0; 1250 do { 1251 if (*cp < '0' || *cp > '9') 1252 return (-1); 1253 *res *= 10; 1254 *res += *cp - '0'; 1255 } while (*(++cp) != '\0'); 1256 return (0); 1257 } 1258 1259 static int 1260 xen_attach_print(void *aux, const char *name) 1261 { 1262 struct xen_attach_args *xa = aux; 1263 1264 if (name) 1265 printf("\"%s\" at %s: %s", xa->xa_name, name, xa->xa_node); 1266 1267 return (UNCONF); 1268 } 1269 1270 int 1271 xen_probe_devices(struct xen_softc *sc) 1272 { 1273 struct xen_attach_args xa; 1274 struct xs_transaction xst; 1275 struct iovec *iovp1 = NULL, *iovp2 = NULL; 1276 int i, j, error = 0, iov1_cnt = 0, iov2_cnt = 0; 1277 char domid[16]; 1278 char path[256]; 1279 1280 memset(&xst, 0, sizeof(xst)); 1281 xst.xst_id = 0; 1282 xst.xst_sc = sc->sc_xs; 1283 xst.xst_flags |= XST_POLL; 1284 1285 if ((error = xs_cmd(&xst, XS_LIST, "device", &iovp1, &iov1_cnt)) != 0) 1286 return (error); 1287 1288 for (i = 0; i < iov1_cnt; i++) { 1289 if (strcmp("suspend", (char *)iovp1[i].iov_base) == 0) 1290 continue; 1291 snprintf(path, sizeof(path), "device/%s", 1292 (char *)iovp1[i].iov_base); 1293 if ((error = xs_cmd(&xst, XS_LIST, path, &iovp2, 1294 &iov2_cnt)) != 0) { 1295 xs_resfree(&xst, iovp1, iov1_cnt); 1296 return (error); 1297 } 1298 for (j = 0; j < iov2_cnt; j++) { 1299 xa.xa_parent = sc; 1300 xa.xa_dmat = &xen_bus_dma_tag; 1301 strlcpy(xa.xa_name, (char *)iovp1[i].iov_base, 1302 sizeof(xa.xa_name)); 1303 snprintf(xa.xa_node, sizeof(xa.xa_node), "device/%s/%s", 1304 (char *)iovp1[i].iov_base, 1305 (char *)iovp2[j].iov_base); 1306 if (xs_getprop(sc, xa.xa_node, "backend-id", domid, 1307 sizeof(domid)) || 1308 xs_getprop(sc, xa.xa_node, "backend", xa.xa_backend, 1309 sizeof(xa.xa_backend))) { 1310 printf("%s: failed to identify \"backend\" " 1311 "for \"%s\"\n", sc->sc_dev.dv_xname, 1312 xa.xa_node); 1313 } else if (atoi(domid, &xa.xa_domid)) { 1314 printf("%s: non-numeric backend domain id " 1315 "\"%s\" for \"%s\"\n", sc->sc_dev.dv_xname, 1316 domid, xa.xa_node); 1317 } 1318 config_found((struct device *)sc, &xa, 1319 xen_attach_print); 1320 } 1321 xs_resfree(&xst, iovp2, iov2_cnt); 1322 } 1323 1324 return (error); 1325 } 1326 1327 #include <machine/pio.h> 1328 1329 #define XMI_PORT 0x10 1330 #define XMI_MAGIC 0x49d2 1331 #define XMI_UNPLUG_IDE 0x01 1332 #define XMI_UNPLUG_NIC 0x02 1333 #define XMI_UNPLUG_IDESEC 0x04 1334 1335 void 1336 xen_disable_emulated_devices(struct xen_softc *sc) 1337 { 1338 #if defined(__i386__) || defined(__amd64__) 1339 ushort unplug = 0; 1340 1341 if (inw(XMI_PORT) != XMI_MAGIC) { 1342 printf("%s: failed to disable emulated devices\n", 1343 sc->sc_dev.dv_xname); 1344 return; 1345 } 1346 if (sc->sc_flags & XSF_UNPLUG_IDE) 1347 unplug |= XMI_UNPLUG_IDE; 1348 if (sc->sc_flags & XSF_UNPLUG_IDESEC) 1349 unplug |= XMI_UNPLUG_IDESEC; 1350 if (sc->sc_flags & XSF_UNPLUG_NIC) 1351 unplug |= XMI_UNPLUG_NIC; 1352 if (unplug) 1353 outw(XMI_PORT, unplug); 1354 #endif /* __i386__ || __amd64__ */ 1355 } 1356