1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 /* 26 * Copyright (c) 2010, Intel Corporation. 27 * All rights reserved. 28 */ 29 /* 30 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 31 */ 32 33 /* 34 * To understand how the apix module interacts with the interrupt subsystem read 35 * the theory statement in uts/i86pc/os/intr.c. 36 */ 37 38 /* 39 * PSMI 1.1 extensions are supported only in 2.6 and later versions. 40 * PSMI 1.2 extensions are supported only in 2.7 and later versions. 41 * PSMI 1.3 and 1.4 extensions are supported in Solaris 10. 42 * PSMI 1.5 extensions are supported in Solaris Nevada. 43 * PSMI 1.6 extensions are supported in Solaris Nevada. 44 * PSMI 1.7 extensions are supported in Solaris Nevada. 45 */ 46 #define PSMI_1_7 47 48 #include <sys/processor.h> 49 #include <sys/time.h> 50 #include <sys/psm.h> 51 #include <sys/smp_impldefs.h> 52 #include <sys/cram.h> 53 #include <sys/acpi/acpi.h> 54 #include <sys/acpica.h> 55 #include <sys/psm_common.h> 56 #include <sys/pit.h> 57 #include <sys/ddi.h> 58 #include <sys/sunddi.h> 59 #include <sys/ddi_impldefs.h> 60 #include <sys/pci.h> 61 #include <sys/promif.h> 62 #include <sys/x86_archext.h> 63 #include <sys/cpc_impl.h> 64 #include <sys/uadmin.h> 65 #include <sys/panic.h> 66 #include <sys/debug.h> 67 #include <sys/archsystm.h> 68 #include <sys/trap.h> 69 #include <sys/machsystm.h> 70 #include <sys/sysmacros.h> 71 #include <sys/cpuvar.h> 72 #include <sys/rm_platter.h> 73 #include <sys/privregs.h> 74 #include <sys/note.h> 75 #include <sys/pci_intr_lib.h> 76 #include <sys/spl.h> 77 #include <sys/clock.h> 78 #include <sys/cyclic.h> 79 #include <sys/dditypes.h> 80 #include <sys/sunddi.h> 81 #include <sys/x_call.h> 82 #include <sys/reboot.h> 83 #include <sys/mach_intr.h> 84 #include <sys/apix.h> 85 #include <sys/apix_irm_impl.h> 86 87 static int apix_probe(); 88 static void apix_init(); 89 static void apix_picinit(void); 90 static int apix_intr_enter(int, int *); 91 static void apix_intr_exit(int, int); 92 static void apix_setspl(int); 93 static int apix_disable_intr(processorid_t); 94 static void apix_enable_intr(processorid_t); 95 static int apix_get_clkvect(int); 96 static int apix_get_ipivect(int, int); 97 static void apix_post_cyclic_setup(void *); 98 static int apix_post_cpu_start(); 99 static int apix_intr_ops(dev_info_t *, ddi_intr_handle_impl_t *, 100 psm_intr_op_t, int *); 101 102 /* 103 * Helper functions for apix_intr_ops() 104 */ 105 static void apix_redistribute_compute(void); 106 static int apix_get_pending(apix_vector_t *); 107 static apix_vector_t *apix_get_req_vector(ddi_intr_handle_impl_t *, ushort_t); 108 static int apix_get_intr_info(ddi_intr_handle_impl_t *, apic_get_intr_t *); 109 static char *apix_get_apic_type(void); 110 static int apix_intx_get_pending(int); 111 static void apix_intx_set_mask(int irqno); 112 static void apix_intx_clear_mask(int irqno); 113 static int apix_intx_get_shared(int irqno); 114 static void apix_intx_set_shared(int irqno, int delta); 115 static apix_vector_t *apix_intx_xlate_vector(dev_info_t *, int, 116 struct intrspec *); 117 static int apix_intx_alloc_vector(dev_info_t *, int, struct intrspec *); 118 119 extern int apic_clkinit(int); 120 121 /* IRM initialization for APIX PSM module */ 122 extern void apix_irm_init(void); 123 124 extern int irm_enable; 125 126 /* 127 * Local static data 128 */ 129 static struct psm_ops apix_ops = { 130 apix_probe, 131 132 apix_init, 133 apix_picinit, 134 apix_intr_enter, 135 apix_intr_exit, 136 apix_setspl, 137 apix_addspl, 138 apix_delspl, 139 apix_disable_intr, 140 apix_enable_intr, 141 NULL, /* psm_softlvl_to_irq */ 142 NULL, /* psm_set_softintr */ 143 144 apic_set_idlecpu, 145 apic_unset_idlecpu, 146 147 apic_clkinit, 148 apix_get_clkvect, 149 NULL, /* psm_hrtimeinit */ 150 apic_gethrtime, 151 152 apic_get_next_processorid, 153 apic_cpu_start, 154 apix_post_cpu_start, 155 apic_shutdown, 156 apix_get_ipivect, 157 apic_send_ipi, 158 159 NULL, /* psm_translate_irq */ 160 NULL, /* psm_notify_error */ 161 NULL, /* psm_notify_func */ 162 apic_timer_reprogram, 163 apic_timer_enable, 164 apic_timer_disable, 165 apix_post_cyclic_setup, 166 apic_preshutdown, 167 apix_intr_ops, /* Advanced DDI Interrupt framework */ 168 apic_state, /* save, restore apic state for S3 */ 169 apic_cpu_ops, /* CPU control interface. */ 170 }; 171 172 struct psm_ops *psmops = &apix_ops; 173 174 static struct psm_info apix_psm_info = { 175 PSM_INFO_VER01_7, /* version */ 176 PSM_OWN_EXCLUSIVE, /* ownership */ 177 &apix_ops, /* operation */ 178 APIX_NAME, /* machine name */ 179 "apix MPv1.4 compatible", 180 }; 181 182 static void *apix_hdlp; 183 184 static int apix_is_enabled = 0; 185 186 /* 187 * Flag to indicate if APIX is to be enabled only for platforms 188 * with specific hw feature(s). 189 */ 190 int apix_hw_chk_enable = 1; 191 192 /* 193 * Hw features that are checked for enabling APIX support. 194 */ 195 #define APIX_SUPPORT_X2APIC 0x00000001 196 uint_t apix_supported_hw = APIX_SUPPORT_X2APIC; 197 198 /* 199 * apix_lock is used for cpu selection and vector re-binding 200 */ 201 lock_t apix_lock; 202 apix_impl_t *apixs[NCPU]; 203 /* 204 * Mapping between device interrupt and the allocated vector. Indexed 205 * by major number. 206 */ 207 apix_dev_vector_t **apix_dev_vector; 208 /* 209 * Mapping between device major number and cpu id. It gets used 210 * when interrupt binding policy round robin with affinity is 211 * applied. With that policy, devices with the same major number 212 * will be bound to the same CPU. 213 */ 214 processorid_t *apix_major_to_cpu; /* major to cpu mapping */ 215 kmutex_t apix_mutex; /* for apix_dev_vector & apix_major_to_cpu */ 216 217 int apix_nipis = 16; /* Maximum number of IPIs */ 218 /* 219 * Maximum number of vectors in a CPU that can be used for interrupt 220 * allocation (including IPIs and the reserved vectors). 221 */ 222 int apix_cpu_nvectors = APIX_NVECTOR; 223 224 /* gcpu.h */ 225 226 extern void apic_do_interrupt(struct regs *rp, trap_trace_rec_t *ttp); 227 extern void apic_change_eoi(); 228 229 /* 230 * This is the loadable module wrapper 231 */ 232 233 int 234 _init(void) 235 { 236 if (apic_coarse_hrtime) 237 apix_ops.psm_gethrtime = &apic_gettime; 238 return (psm_mod_init(&apix_hdlp, &apix_psm_info)); 239 } 240 241 int 242 _fini(void) 243 { 244 return (psm_mod_fini(&apix_hdlp, &apix_psm_info)); 245 } 246 247 int 248 _info(struct modinfo *modinfop) 249 { 250 return (psm_mod_info(&apix_hdlp, &apix_psm_info, modinfop)); 251 } 252 253 static int 254 apix_probe() 255 { 256 int rval; 257 258 if (apix_enable == 0) 259 return (PSM_FAILURE); 260 261 /* check for hw features if specified */ 262 if (apix_hw_chk_enable) { 263 /* check if x2APIC mode is supported */ 264 if ((apix_supported_hw & APIX_SUPPORT_X2APIC) == 265 APIX_SUPPORT_X2APIC) { 266 if (!((apic_local_mode() == LOCAL_X2APIC) || 267 apic_detect_x2apic())) { 268 /* x2APIC mode is not supported in the hw */ 269 apix_enable = 0; 270 } 271 } 272 if (apix_enable == 0) 273 return (PSM_FAILURE); 274 } 275 276 rval = apic_probe_common(apix_psm_info.p_mach_idstring); 277 if (rval == PSM_SUCCESS) 278 apix_is_enabled = 1; 279 else 280 apix_is_enabled = 0; 281 return (rval); 282 } 283 284 /* 285 * Initialize the data structures needed by pcplusmpx module. 286 * Specifically, the data structures used by addspl() and delspl() 287 * routines. 288 */ 289 static void 290 apix_softinit() 291 { 292 int i, *iptr; 293 apix_impl_t *hdlp; 294 int nproc; 295 296 nproc = max(apic_nproc, apic_max_nproc); 297 298 hdlp = kmem_zalloc(nproc * sizeof (apix_impl_t), KM_SLEEP); 299 for (i = 0; i < nproc; i++) { 300 apixs[i] = &hdlp[i]; 301 apixs[i]->x_cpuid = i; 302 LOCK_INIT_CLEAR(&apixs[i]->x_lock); 303 } 304 305 /* cpu 0 is always up (for now) */ 306 apic_cpus[0].aci_status = APIC_CPU_ONLINE | APIC_CPU_INTR_ENABLE; 307 308 iptr = (int *)&apic_irq_table[0]; 309 for (i = 0; i <= APIC_MAX_VECTOR; i++) { 310 apic_level_intr[i] = 0; 311 *iptr++ = NULL; 312 } 313 mutex_init(&airq_mutex, NULL, MUTEX_DEFAULT, NULL); 314 315 apix_dev_vector = kmem_zalloc(sizeof (apix_dev_vector_t *) * devcnt, 316 KM_SLEEP); 317 318 if (apic_intr_policy == INTR_ROUND_ROBIN_WITH_AFFINITY) { 319 apix_major_to_cpu = kmem_zalloc(sizeof (int) * devcnt, 320 KM_SLEEP); 321 for (i = 0; i < devcnt; i++) 322 apix_major_to_cpu[i] = IRQ_UNINIT; 323 } 324 325 mutex_init(&apix_mutex, NULL, MUTEX_DEFAULT, NULL); 326 } 327 328 static int 329 apix_get_pending_spl(void) 330 { 331 int cpuid = CPU->cpu_id; 332 333 return (bsrw_insn(apixs[cpuid]->x_intr_pending)); 334 } 335 336 static uintptr_t 337 apix_get_intr_handler(int cpu, short vec) 338 { 339 apix_vector_t *apix_vector; 340 341 ASSERT(cpu < apic_nproc && vec < APIX_NVECTOR); 342 if (cpu >= apic_nproc) 343 return (NULL); 344 345 apix_vector = apixs[cpu]->x_vectbl[vec]; 346 347 return ((uintptr_t)(apix_vector->v_autovect)); 348 } 349 350 static void 351 apix_init() 352 { 353 extern void (*do_interrupt_common)(struct regs *, trap_trace_rec_t *); 354 355 APIC_VERBOSE(INIT, (CE_CONT, "apix: psm_softinit\n")); 356 357 do_interrupt_common = apix_do_interrupt; 358 addintr = apix_add_avintr; 359 remintr = apix_rem_avintr; 360 get_pending_spl = apix_get_pending_spl; 361 get_intr_handler = apix_get_intr_handler; 362 psm_get_localapicid = apic_get_localapicid; 363 psm_get_ioapicid = apic_get_ioapicid; 364 365 apix_softinit(); 366 367 #if !defined(__amd64) 368 if (cpuid_have_cr8access(CPU)) 369 apic_have_32bit_cr8 = 1; 370 #endif 371 372 /* 373 * Initialize IRM pool parameters 374 */ 375 if (irm_enable) { 376 int i; 377 int lowest_irq; 378 int highest_irq; 379 380 /* number of CPUs present */ 381 apix_irminfo.apix_ncpus = apic_nproc; 382 /* total number of entries in all of the IOAPICs present */ 383 lowest_irq = apic_io_vectbase[0]; 384 highest_irq = apic_io_vectend[0]; 385 for (i = 1; i < apic_io_max; i++) { 386 if (apic_io_vectbase[i] < lowest_irq) 387 lowest_irq = apic_io_vectbase[i]; 388 if (apic_io_vectend[i] > highest_irq) 389 highest_irq = apic_io_vectend[i]; 390 } 391 apix_irminfo.apix_ioapic_max_vectors = 392 highest_irq - lowest_irq + 1; 393 /* 394 * Number of available per-CPU vectors excluding 395 * reserved vectors for Dtrace, int80, system-call, 396 * fast-trap, etc. 397 */ 398 apix_irminfo.apix_per_cpu_vectors = APIX_NAVINTR - 399 APIX_SW_RESERVED_VECTORS; 400 401 /* Number of vectors (pre) allocated (SCI and HPET) */ 402 apix_irminfo.apix_vectors_allocated = 0; 403 if (apic_hpet_vect != -1) 404 apix_irminfo.apix_vectors_allocated++; 405 if (apic_sci_vect != -1) 406 apix_irminfo.apix_vectors_allocated++; 407 } 408 } 409 410 static void 411 apix_init_intr() 412 { 413 processorid_t cpun = psm_get_cpu_id(); 414 uint_t nlvt; 415 uint32_t svr = AV_UNIT_ENABLE | APIC_SPUR_INTR; 416 extern void cmi_cmci_trap(void); 417 418 apic_reg_ops->apic_write_task_reg(APIC_MASK_ALL); 419 420 if (apic_mode == LOCAL_APIC) { 421 /* 422 * We are running APIC in MMIO mode. 423 */ 424 if (apic_flat_model) { 425 apic_reg_ops->apic_write(APIC_FORMAT_REG, 426 APIC_FLAT_MODEL); 427 } else { 428 apic_reg_ops->apic_write(APIC_FORMAT_REG, 429 APIC_CLUSTER_MODEL); 430 } 431 432 apic_reg_ops->apic_write(APIC_DEST_REG, 433 AV_HIGH_ORDER >> cpun); 434 } 435 436 if (apic_directed_EOI_supported()) { 437 /* 438 * Setting the 12th bit in the Spurious Interrupt Vector 439 * Register suppresses broadcast EOIs generated by the local 440 * APIC. The suppression of broadcast EOIs happens only when 441 * interrupts are level-triggered. 442 */ 443 svr |= APIC_SVR_SUPPRESS_BROADCAST_EOI; 444 } 445 446 /* need to enable APIC before unmasking NMI */ 447 apic_reg_ops->apic_write(APIC_SPUR_INT_REG, svr); 448 449 /* 450 * Presence of an invalid vector with delivery mode AV_FIXED can 451 * cause an error interrupt, even if the entry is masked...so 452 * write a valid vector to LVT entries along with the mask bit 453 */ 454 455 /* All APICs have timer and LINT0/1 */ 456 apic_reg_ops->apic_write(APIC_LOCAL_TIMER, AV_MASK|APIC_RESV_IRQ); 457 apic_reg_ops->apic_write(APIC_INT_VECT0, AV_MASK|APIC_RESV_IRQ); 458 apic_reg_ops->apic_write(APIC_INT_VECT1, AV_NMI); /* enable NMI */ 459 460 /* 461 * On integrated APICs, the number of LVT entries is 462 * 'Max LVT entry' + 1; on 82489DX's (non-integrated 463 * APICs), nlvt is "3" (LINT0, LINT1, and timer) 464 */ 465 466 if (apic_cpus[cpun].aci_local_ver < APIC_INTEGRATED_VERS) { 467 nlvt = 3; 468 } else { 469 nlvt = ((apic_reg_ops->apic_read(APIC_VERS_REG) >> 16) & 470 0xFF) + 1; 471 } 472 473 if (nlvt >= 5) { 474 /* Enable performance counter overflow interrupt */ 475 476 if (!is_x86_feature(x86_featureset, X86FSET_MSR)) 477 apic_enable_cpcovf_intr = 0; 478 if (apic_enable_cpcovf_intr) { 479 if (apic_cpcovf_vect == 0) { 480 int ipl = APIC_PCINT_IPL; 481 482 apic_cpcovf_vect = apix_get_ipivect(ipl, -1); 483 ASSERT(apic_cpcovf_vect); 484 485 (void) add_avintr(NULL, ipl, 486 (avfunc)kcpc_hw_overflow_intr, 487 "apic pcint", apic_cpcovf_vect, 488 NULL, NULL, NULL, NULL); 489 kcpc_hw_overflow_intr_installed = 1; 490 kcpc_hw_enable_cpc_intr = 491 apic_cpcovf_mask_clear; 492 } 493 apic_reg_ops->apic_write(APIC_PCINT_VECT, 494 apic_cpcovf_vect); 495 } 496 } 497 498 if (nlvt >= 6) { 499 /* Only mask TM intr if the BIOS apparently doesn't use it */ 500 501 uint32_t lvtval; 502 503 lvtval = apic_reg_ops->apic_read(APIC_THERM_VECT); 504 if (((lvtval & AV_MASK) == AV_MASK) || 505 ((lvtval & AV_DELIV_MODE) != AV_SMI)) { 506 apic_reg_ops->apic_write(APIC_THERM_VECT, 507 AV_MASK|APIC_RESV_IRQ); 508 } 509 } 510 511 /* Enable error interrupt */ 512 513 if (nlvt >= 4 && apic_enable_error_intr) { 514 if (apic_errvect == 0) { 515 int ipl = 0xf; /* get highest priority intr */ 516 apic_errvect = apix_get_ipivect(ipl, -1); 517 ASSERT(apic_errvect); 518 /* 519 * Not PSMI compliant, but we are going to merge 520 * with ON anyway 521 */ 522 (void) add_avintr(NULL, ipl, 523 (avfunc)apic_error_intr, "apic error intr", 524 apic_errvect, NULL, NULL, NULL, NULL); 525 } 526 apic_reg_ops->apic_write(APIC_ERR_VECT, apic_errvect); 527 apic_reg_ops->apic_write(APIC_ERROR_STATUS, 0); 528 apic_reg_ops->apic_write(APIC_ERROR_STATUS, 0); 529 } 530 531 /* Enable CMCI interrupt */ 532 if (cmi_enable_cmci) { 533 mutex_enter(&cmci_cpu_setup_lock); 534 if (cmci_cpu_setup_registered == 0) { 535 mutex_enter(&cpu_lock); 536 register_cpu_setup_func(cmci_cpu_setup, NULL); 537 mutex_exit(&cpu_lock); 538 cmci_cpu_setup_registered = 1; 539 } 540 mutex_exit(&cmci_cpu_setup_lock); 541 542 if (apic_cmci_vect == 0) { 543 int ipl = 0x2; 544 apic_cmci_vect = apix_get_ipivect(ipl, -1); 545 ASSERT(apic_cmci_vect); 546 547 (void) add_avintr(NULL, ipl, 548 (avfunc)cmi_cmci_trap, "apic cmci intr", 549 apic_cmci_vect, NULL, NULL, NULL, NULL); 550 } 551 apic_reg_ops->apic_write(APIC_CMCI_VECT, apic_cmci_vect); 552 } 553 554 apic_reg_ops->apic_write_task_reg(0); 555 } 556 557 static void 558 apix_picinit(void) 559 { 560 int i, j; 561 uint_t isr; 562 563 APIC_VERBOSE(INIT, (CE_CONT, "apix: psm_picinit\n")); 564 565 /* 566 * initialize interrupt remapping before apic 567 * hardware initialization 568 */ 569 apic_intrmap_init(apic_mode); 570 if (apic_vt_ops == psm_vt_ops) 571 apix_mul_ioapic_method = APIC_MUL_IOAPIC_IIR; 572 573 /* 574 * On UniSys Model 6520, the BIOS leaves vector 0x20 isr 575 * bit on without clearing it with EOI. Since softint 576 * uses vector 0x20 to interrupt itself, so softint will 577 * not work on this machine. In order to fix this problem 578 * a check is made to verify all the isr bits are clear. 579 * If not, EOIs are issued to clear the bits. 580 */ 581 for (i = 7; i >= 1; i--) { 582 isr = apic_reg_ops->apic_read(APIC_ISR_REG + (i * 4)); 583 if (isr != 0) 584 for (j = 0; ((j < 32) && (isr != 0)); j++) 585 if (isr & (1 << j)) { 586 apic_reg_ops->apic_write( 587 APIC_EOI_REG, 0); 588 isr &= ~(1 << j); 589 apic_error |= APIC_ERR_BOOT_EOI; 590 } 591 } 592 593 /* set a flag so we know we have run apic_picinit() */ 594 apic_picinit_called = 1; 595 LOCK_INIT_CLEAR(&apic_gethrtime_lock); 596 LOCK_INIT_CLEAR(&apic_ioapic_lock); 597 LOCK_INIT_CLEAR(&apic_error_lock); 598 LOCK_INIT_CLEAR(&apic_mode_switch_lock); 599 600 picsetup(); /* initialise the 8259 */ 601 602 /* add nmi handler - least priority nmi handler */ 603 LOCK_INIT_CLEAR(&apic_nmi_lock); 604 605 if (!psm_add_nmintr(0, (avfunc) apic_nmi_intr, 606 "apix NMI handler", (caddr_t)NULL)) 607 cmn_err(CE_WARN, "apix: Unable to add nmi handler"); 608 609 apix_init_intr(); 610 611 /* enable apic mode if imcr present */ 612 if (apic_imcrp) { 613 outb(APIC_IMCR_P1, (uchar_t)APIC_IMCR_SELECT); 614 outb(APIC_IMCR_P2, (uchar_t)APIC_IMCR_APIC); 615 } 616 617 ioapix_init_intr(IOAPIC_MASK); 618 619 /* setup global IRM pool if applicable */ 620 if (irm_enable) 621 apix_irm_init(); 622 } 623 624 static __inline__ void 625 apix_send_eoi(void) 626 { 627 if (apic_mode == LOCAL_APIC) 628 LOCAL_APIC_WRITE_REG(APIC_EOI_REG, 0); 629 else 630 X2APIC_WRITE(APIC_EOI_REG, 0); 631 } 632 633 /* 634 * platform_intr_enter 635 * 636 * Called at the beginning of the interrupt service routine, but unlike 637 * pcplusmp, does not mask interrupts. An EOI is given to the interrupt 638 * controller to enable other HW interrupts but interrupts are still 639 * masked by the IF flag. 640 * 641 * Return -1 for spurious interrupts 642 * 643 */ 644 static int 645 apix_intr_enter(int ipl, int *vectorp) 646 { 647 struct cpu *cpu = CPU; 648 uint32_t cpuid = CPU->cpu_id; 649 apic_cpus_info_t *cpu_infop; 650 uchar_t vector; 651 apix_vector_t *vecp; 652 int nipl = -1; 653 654 /* 655 * The real vector delivered is (*vectorp + 0x20), but our caller 656 * subtracts 0x20 from the vector before passing it to us. 657 * (That's why APIC_BASE_VECT is 0x20.) 658 */ 659 vector = *vectorp = (uchar_t)*vectorp + APIC_BASE_VECT; 660 661 cpu_infop = &apic_cpus[cpuid]; 662 if (vector == APIC_SPUR_INTR) { 663 cpu_infop->aci_spur_cnt++; 664 return (APIC_INT_SPURIOUS); 665 } 666 667 vecp = xv_vector(cpuid, vector); 668 if (vecp == NULL) { 669 if (APIX_IS_FAKE_INTR(vector)) 670 nipl = apix_rebindinfo.i_pri; 671 apix_send_eoi(); 672 return (nipl); 673 } 674 nipl = vecp->v_pri; 675 676 /* if interrupted by the clock, increment apic_nsec_since_boot */ 677 if (vector == (apic_clkvect + APIC_BASE_VECT)) { 678 if (!apic_oneshot) { 679 /* NOTE: this is not MT aware */ 680 apic_hrtime_stamp++; 681 apic_nsec_since_boot += apic_nsec_per_intr; 682 apic_hrtime_stamp++; 683 last_count_read = apic_hertz_count; 684 apix_redistribute_compute(); 685 } 686 687 apix_send_eoi(); 688 689 return (nipl); 690 } 691 692 ASSERT(vecp->v_state != APIX_STATE_OBSOLETED); 693 694 /* pre-EOI handling for level-triggered interrupts */ 695 if (!APIX_IS_DIRECTED_EOI(apix_mul_ioapic_method) && 696 (vecp->v_type & APIX_TYPE_FIXED) && apic_level_intr[vecp->v_inum]) 697 apix_level_intr_pre_eoi(vecp->v_inum); 698 699 /* send back EOI */ 700 apix_send_eoi(); 701 702 cpu_infop->aci_current[nipl] = vector; 703 if ((nipl > ipl) && (nipl > cpu->cpu_base_spl)) { 704 cpu_infop->aci_curipl = (uchar_t)nipl; 705 cpu_infop->aci_ISR_in_progress |= 1 << nipl; 706 } 707 708 #ifdef DEBUG 709 if (vector >= APIX_IPI_MIN) 710 return (nipl); /* skip IPI */ 711 712 APIC_DEBUG_BUF_PUT(vector); 713 APIC_DEBUG_BUF_PUT(vecp->v_inum); 714 APIC_DEBUG_BUF_PUT(nipl); 715 APIC_DEBUG_BUF_PUT(psm_get_cpu_id()); 716 if ((apic_stretch_interrupts) && (apic_stretch_ISR & (1 << nipl))) 717 drv_usecwait(apic_stretch_interrupts); 718 #endif /* DEBUG */ 719 720 return (nipl); 721 } 722 723 /* 724 * Any changes made to this function must also change X2APIC 725 * version of intr_exit. 726 */ 727 static void 728 apix_intr_exit(int prev_ipl, int arg2) 729 { 730 int cpuid = psm_get_cpu_id(); 731 apic_cpus_info_t *cpu_infop = &apic_cpus[cpuid]; 732 apix_impl_t *apixp = apixs[cpuid]; 733 734 UNREFERENCED_1PARAMETER(arg2); 735 736 cpu_infop->aci_curipl = (uchar_t)prev_ipl; 737 /* ISR above current pri could not be in progress */ 738 cpu_infop->aci_ISR_in_progress &= (2 << prev_ipl) - 1; 739 740 if (apixp->x_obsoletes != NULL) { 741 if (APIX_CPU_LOCK_HELD(cpuid)) 742 return; 743 744 APIX_ENTER_CPU_LOCK(cpuid); 745 (void) apix_obsolete_vector(apixp->x_obsoletes); 746 APIX_LEAVE_CPU_LOCK(cpuid); 747 } 748 } 749 750 /* 751 * The pcplusmp setspl code uses the TPR to mask all interrupts at or below the 752 * given ipl, but apix never uses the TPR and we never mask a subset of the 753 * interrupts. They are either all blocked by the IF flag or all can come in. 754 * 755 * For setspl, we mask all interrupts for XC_HI_PIL (15), otherwise, interrupts 756 * can come in if currently enabled by the IF flag. This table shows the state 757 * of the IF flag when we leave this function. 758 * 759 * curr IF | ipl == 15 ipl != 15 760 * --------+--------------------------- 761 * 0 | 0 0 762 * 1 | 0 1 763 */ 764 static void 765 apix_setspl(int ipl) 766 { 767 /* 768 * Interrupts at ipl above this cannot be in progress, so the following 769 * mask is ok. 770 */ 771 apic_cpus[psm_get_cpu_id()].aci_ISR_in_progress &= (2 << ipl) - 1; 772 773 if (ipl == XC_HI_PIL) 774 cli(); 775 } 776 777 int 778 apix_addspl(int virtvec, int ipl, int min_ipl, int max_ipl) 779 { 780 uint32_t cpuid = APIX_VIRTVEC_CPU(virtvec); 781 uchar_t vector = (uchar_t)APIX_VIRTVEC_VECTOR(virtvec); 782 apix_vector_t *vecp = xv_vector(cpuid, vector); 783 784 UNREFERENCED_3PARAMETER(ipl, min_ipl, max_ipl); 785 ASSERT(vecp != NULL && LOCK_HELD(&apix_lock)); 786 787 if (vecp->v_type == APIX_TYPE_FIXED) 788 apix_intx_set_shared(vecp->v_inum, 1); 789 790 /* There are more interrupts, so it's already been enabled */ 791 if (vecp->v_share > 1) 792 return (PSM_SUCCESS); 793 794 /* return if it is not hardware interrupt */ 795 if (vecp->v_type == APIX_TYPE_IPI) 796 return (PSM_SUCCESS); 797 798 /* 799 * if apix_picinit() has not been called yet, just return. 800 * At the end of apic_picinit(), we will call setup_io_intr(). 801 */ 802 if (!apic_picinit_called) 803 return (PSM_SUCCESS); 804 805 (void) apix_setup_io_intr(vecp); 806 807 return (PSM_SUCCESS); 808 } 809 810 int 811 apix_delspl(int virtvec, int ipl, int min_ipl, int max_ipl) 812 { 813 uint32_t cpuid = APIX_VIRTVEC_CPU(virtvec); 814 uchar_t vector = (uchar_t)APIX_VIRTVEC_VECTOR(virtvec); 815 apix_vector_t *vecp = xv_vector(cpuid, vector); 816 817 UNREFERENCED_3PARAMETER(ipl, min_ipl, max_ipl); 818 ASSERT(vecp != NULL && LOCK_HELD(&apix_lock)); 819 820 if (vecp->v_type == APIX_TYPE_FIXED) 821 apix_intx_set_shared(vecp->v_inum, -1); 822 823 /* There are more interrupts */ 824 if (vecp->v_share > 1) 825 return (PSM_SUCCESS); 826 827 /* return if it is not hardware interrupt */ 828 if (vecp->v_type == APIX_TYPE_IPI) 829 return (PSM_SUCCESS); 830 831 if (!apic_picinit_called) { 832 cmn_err(CE_WARN, "apix: delete 0x%x before apic init", 833 virtvec); 834 return (PSM_SUCCESS); 835 } 836 837 apix_disable_vector(vecp); 838 839 return (PSM_SUCCESS); 840 } 841 842 /* 843 * Try and disable all interrupts. We just assign interrupts to other 844 * processors based on policy. If any were bound by user request, we 845 * let them continue and return failure. We do not bother to check 846 * for cache affinity while rebinding. 847 */ 848 static int 849 apix_disable_intr(processorid_t cpun) 850 { 851 apix_impl_t *apixp = apixs[cpun]; 852 apix_vector_t *vecp, *newp; 853 int bindcpu, i, hardbound = 0, errbound = 0, ret, loop, type; 854 855 lock_set(&apix_lock); 856 857 apic_cpus[cpun].aci_status &= ~APIC_CPU_INTR_ENABLE; 858 apic_cpus[cpun].aci_curipl = 0; 859 860 /* if this is for SUSPEND operation, skip rebinding */ 861 if (apic_cpus[cpun].aci_status & APIC_CPU_SUSPEND) { 862 for (i = APIX_AVINTR_MIN; i <= APIX_AVINTR_MAX; i++) { 863 vecp = apixp->x_vectbl[i]; 864 if (!IS_VECT_ENABLED(vecp)) 865 continue; 866 867 apix_disable_vector(vecp); 868 } 869 lock_clear(&apix_lock); 870 return (PSM_SUCCESS); 871 } 872 873 for (i = APIX_AVINTR_MIN; i <= APIX_AVINTR_MAX; i++) { 874 vecp = apixp->x_vectbl[i]; 875 if (!IS_VECT_ENABLED(vecp)) 876 continue; 877 878 if (vecp->v_flags & APIX_VECT_USER_BOUND) { 879 hardbound++; 880 continue; 881 } 882 type = vecp->v_type; 883 884 /* 885 * If there are bound interrupts on this cpu, then 886 * rebind them to other processors. 887 */ 888 loop = 0; 889 do { 890 bindcpu = apic_find_cpu(APIC_CPU_INTR_ENABLE); 891 892 if (type != APIX_TYPE_MSI) 893 newp = apix_set_cpu(vecp, bindcpu, &ret); 894 else 895 newp = apix_grp_set_cpu(vecp, bindcpu, &ret); 896 } while ((newp == NULL) && (loop++ < apic_nproc)); 897 898 if (loop >= apic_nproc) { 899 errbound++; 900 cmn_err(CE_WARN, "apix: failed to rebind vector %x/%x", 901 vecp->v_cpuid, vecp->v_vector); 902 } 903 } 904 905 lock_clear(&apix_lock); 906 907 if (hardbound || errbound) { 908 cmn_err(CE_WARN, "Could not disable interrupts on %d" 909 "due to user bound interrupts or failed operation", 910 cpun); 911 return (PSM_FAILURE); 912 } 913 914 return (PSM_SUCCESS); 915 } 916 917 /* 918 * Bind interrupts to specified CPU 919 */ 920 static void 921 apix_enable_intr(processorid_t cpun) 922 { 923 apix_vector_t *vecp; 924 int i, ret; 925 processorid_t n; 926 927 lock_set(&apix_lock); 928 929 apic_cpus[cpun].aci_status |= APIC_CPU_INTR_ENABLE; 930 931 /* interrupt enabling for system resume */ 932 if (apic_cpus[cpun].aci_status & APIC_CPU_SUSPEND) { 933 for (i = APIX_AVINTR_MIN; i <= APIX_AVINTR_MAX; i++) { 934 vecp = xv_vector(cpun, i); 935 if (!IS_VECT_ENABLED(vecp)) 936 continue; 937 938 apix_enable_vector(vecp); 939 } 940 apic_cpus[cpun].aci_status &= ~APIC_CPU_SUSPEND; 941 } 942 943 for (n = 0; n < apic_nproc; n++) { 944 if (!apic_cpu_in_range(n) || n == cpun || 945 (apic_cpus[n].aci_status & APIC_CPU_INTR_ENABLE) == 0) 946 continue; 947 948 for (i = APIX_AVINTR_MIN; i <= APIX_AVINTR_MAX; i++) { 949 vecp = xv_vector(n, i); 950 if (!IS_VECT_ENABLED(vecp) || 951 vecp->v_bound_cpuid != cpun) 952 continue; 953 954 if (vecp->v_type != APIX_TYPE_MSI) 955 (void) apix_set_cpu(vecp, cpun, &ret); 956 else 957 (void) apix_grp_set_cpu(vecp, cpun, &ret); 958 } 959 } 960 961 lock_clear(&apix_lock); 962 } 963 964 /* 965 * Allocate vector for IPI 966 * type == -1 indicates it is an internal request. Do not change 967 * resv_vector for these requests. 968 */ 969 static int 970 apix_get_ipivect(int ipl, int type) 971 { 972 uchar_t vector; 973 974 if ((vector = apix_alloc_ipi(ipl)) > 0) { 975 if (type != -1) 976 apic_resv_vector[ipl] = vector; 977 return (vector); 978 } 979 apic_error |= APIC_ERR_GET_IPIVECT_FAIL; 980 return (-1); /* shouldn't happen */ 981 } 982 983 static int 984 apix_get_clkvect(int ipl) 985 { 986 int vector; 987 988 if ((vector = apix_get_ipivect(ipl, -1)) == -1) 989 return (-1); 990 991 apic_clkvect = vector - APIC_BASE_VECT; 992 APIC_VERBOSE(IPI, (CE_CONT, "apix: clock vector = %x\n", 993 apic_clkvect)); 994 return (vector); 995 } 996 997 static int 998 apix_post_cpu_start() 999 { 1000 int cpun; 1001 static int cpus_started = 1; 1002 1003 /* We know this CPU + BSP started successfully. */ 1004 cpus_started++; 1005 1006 /* 1007 * On BSP we would have enabled X2APIC, if supported by processor, 1008 * in acpi_probe(), but on AP we do it here. 1009 * 1010 * We enable X2APIC mode only if BSP is running in X2APIC & the 1011 * local APIC mode of the current CPU is MMIO (xAPIC). 1012 */ 1013 if (apic_mode == LOCAL_X2APIC && apic_detect_x2apic() && 1014 apic_local_mode() == LOCAL_APIC) { 1015 apic_enable_x2apic(); 1016 } 1017 1018 /* 1019 * Switch back to x2apic IPI sending method for performance when target 1020 * CPU has entered x2apic mode. 1021 */ 1022 if (apic_mode == LOCAL_X2APIC) { 1023 apic_switch_ipi_callback(B_FALSE); 1024 } 1025 1026 splx(ipltospl(LOCK_LEVEL)); 1027 apix_init_intr(); 1028 1029 /* 1030 * since some systems don't enable the internal cache on the non-boot 1031 * cpus, so we have to enable them here 1032 */ 1033 setcr0(getcr0() & ~(CR0_CD | CR0_NW)); 1034 1035 #ifdef DEBUG 1036 APIC_AV_PENDING_SET(); 1037 #else 1038 if (apic_mode == LOCAL_APIC) 1039 APIC_AV_PENDING_SET(); 1040 #endif /* DEBUG */ 1041 1042 /* 1043 * We may be booting, or resuming from suspend; aci_status will 1044 * be APIC_CPU_INTR_ENABLE if coming from suspend, so we add the 1045 * APIC_CPU_ONLINE flag here rather than setting aci_status completely. 1046 */ 1047 cpun = psm_get_cpu_id(); 1048 apic_cpus[cpun].aci_status |= APIC_CPU_ONLINE; 1049 1050 apic_reg_ops->apic_write(APIC_DIVIDE_REG, apic_divide_reg_init); 1051 1052 return (PSM_SUCCESS); 1053 } 1054 1055 /* 1056 * If this module needs a periodic handler for the interrupt distribution, it 1057 * can be added here. The argument to the periodic handler is not currently 1058 * used, but is reserved for future. 1059 */ 1060 static void 1061 apix_post_cyclic_setup(void *arg) 1062 { 1063 UNREFERENCED_1PARAMETER(arg); 1064 1065 cyc_handler_t cyh; 1066 cyc_time_t cyt; 1067 1068 /* cpu_lock is held */ 1069 /* set up a periodic handler for intr redistribution */ 1070 1071 /* 1072 * In peridoc mode intr redistribution processing is done in 1073 * apic_intr_enter during clk intr processing 1074 */ 1075 if (!apic_oneshot) 1076 return; 1077 1078 /* 1079 * Register a periodical handler for the redistribution processing. 1080 * Though we would generally prefer to use the DDI interface for 1081 * periodic handler invocation, ddi_periodic_add(9F), we are 1082 * unfortunately already holding cpu_lock, which ddi_periodic_add will 1083 * attempt to take for us. Thus, we add our own cyclic directly: 1084 */ 1085 cyh.cyh_func = (void (*)(void *))apix_redistribute_compute; 1086 cyh.cyh_arg = NULL; 1087 cyh.cyh_level = CY_LOW_LEVEL; 1088 1089 cyt.cyt_when = 0; 1090 cyt.cyt_interval = apic_redistribute_sample_interval; 1091 1092 apic_cyclic_id = cyclic_add(&cyh, &cyt); 1093 } 1094 1095 /* 1096 * Called the first time we enable x2apic mode on this cpu. 1097 * Update some of the function pointers to use x2apic routines. 1098 */ 1099 void 1100 x2apic_update_psm() 1101 { 1102 struct psm_ops *pops = &apix_ops; 1103 1104 ASSERT(pops != NULL); 1105 1106 /* 1107 * The pcplusmp module's version of x2apic_update_psm makes additional 1108 * changes that we do not have to make here. It needs to make those 1109 * changes because pcplusmp relies on the TPR register and the means of 1110 * addressing that changes when using the local apic versus the x2apic. 1111 * It's also worth noting that the apix driver specific function end up 1112 * being apix_foo as opposed to apic_foo and x2apic_foo. 1113 */ 1114 pops->psm_send_ipi = x2apic_send_ipi; 1115 1116 send_dirintf = pops->psm_send_ipi; 1117 1118 apic_mode = LOCAL_X2APIC; 1119 apic_change_ops(); 1120 } 1121 1122 /* 1123 * This function provides external interface to the nexus for all 1124 * functionalities related to the new DDI interrupt framework. 1125 * 1126 * Input: 1127 * dip - pointer to the dev_info structure of the requested device 1128 * hdlp - pointer to the internal interrupt handle structure for the 1129 * requested interrupt 1130 * intr_op - opcode for this call 1131 * result - pointer to the integer that will hold the result to be 1132 * passed back if return value is PSM_SUCCESS 1133 * 1134 * Output: 1135 * return value is either PSM_SUCCESS or PSM_FAILURE 1136 */ 1137 static int 1138 apix_intr_ops(dev_info_t *dip, ddi_intr_handle_impl_t *hdlp, 1139 psm_intr_op_t intr_op, int *result) 1140 { 1141 int cap; 1142 apix_vector_t *vecp, *newvecp; 1143 struct intrspec *ispec, intr_spec; 1144 processorid_t target; 1145 1146 ispec = &intr_spec; 1147 ispec->intrspec_pri = hdlp->ih_pri; 1148 ispec->intrspec_vec = hdlp->ih_inum; 1149 ispec->intrspec_func = hdlp->ih_cb_func; 1150 1151 switch (intr_op) { 1152 case PSM_INTR_OP_ALLOC_VECTORS: 1153 switch (hdlp->ih_type) { 1154 case DDI_INTR_TYPE_MSI: 1155 /* allocate MSI vectors */ 1156 *result = apix_alloc_msi(dip, hdlp->ih_inum, 1157 hdlp->ih_scratch1, 1158 (int)(uintptr_t)hdlp->ih_scratch2); 1159 break; 1160 case DDI_INTR_TYPE_MSIX: 1161 /* allocate MSI-X vectors */ 1162 *result = apix_alloc_msix(dip, hdlp->ih_inum, 1163 hdlp->ih_scratch1, 1164 (int)(uintptr_t)hdlp->ih_scratch2); 1165 break; 1166 case DDI_INTR_TYPE_FIXED: 1167 /* allocate or share vector for fixed */ 1168 if ((ihdl_plat_t *)hdlp->ih_private == NULL) { 1169 return (PSM_FAILURE); 1170 } 1171 ispec = ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp; 1172 *result = apix_intx_alloc_vector(dip, hdlp->ih_inum, 1173 ispec); 1174 break; 1175 default: 1176 return (PSM_FAILURE); 1177 } 1178 break; 1179 case PSM_INTR_OP_FREE_VECTORS: 1180 apix_free_vectors(dip, hdlp->ih_inum, hdlp->ih_scratch1, 1181 hdlp->ih_type); 1182 break; 1183 case PSM_INTR_OP_XLATE_VECTOR: 1184 /* 1185 * Vectors are allocated by ALLOC and freed by FREE. 1186 * XLATE finds and returns APIX_VIRTVEC_VECTOR(cpu, vector). 1187 */ 1188 *result = APIX_INVALID_VECT; 1189 vecp = apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type); 1190 if (vecp != NULL) { 1191 *result = APIX_VIRTVECTOR(vecp->v_cpuid, 1192 vecp->v_vector); 1193 break; 1194 } 1195 1196 /* 1197 * No vector to device mapping exists. If this is FIXED type 1198 * then check if this IRQ is already mapped for another device 1199 * then return the vector number for it (i.e. shared IRQ case). 1200 * Otherwise, return PSM_FAILURE. 1201 */ 1202 if (hdlp->ih_type == DDI_INTR_TYPE_FIXED) { 1203 vecp = apix_intx_xlate_vector(dip, hdlp->ih_inum, 1204 ispec); 1205 *result = (vecp == NULL) ? APIX_INVALID_VECT : 1206 APIX_VIRTVECTOR(vecp->v_cpuid, vecp->v_vector); 1207 } 1208 if (*result == APIX_INVALID_VECT) 1209 return (PSM_FAILURE); 1210 break; 1211 case PSM_INTR_OP_GET_PENDING: 1212 vecp = apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type); 1213 if (vecp == NULL) 1214 return (PSM_FAILURE); 1215 1216 *result = apix_get_pending(vecp); 1217 break; 1218 case PSM_INTR_OP_CLEAR_MASK: 1219 if (hdlp->ih_type != DDI_INTR_TYPE_FIXED) 1220 return (PSM_FAILURE); 1221 1222 vecp = apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type); 1223 if (vecp == NULL) 1224 return (PSM_FAILURE); 1225 1226 apix_intx_clear_mask(vecp->v_inum); 1227 break; 1228 case PSM_INTR_OP_SET_MASK: 1229 if (hdlp->ih_type != DDI_INTR_TYPE_FIXED) 1230 return (PSM_FAILURE); 1231 1232 vecp = apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type); 1233 if (vecp == NULL) 1234 return (PSM_FAILURE); 1235 1236 apix_intx_set_mask(vecp->v_inum); 1237 break; 1238 case PSM_INTR_OP_GET_SHARED: 1239 if (hdlp->ih_type != DDI_INTR_TYPE_FIXED) 1240 return (PSM_FAILURE); 1241 1242 vecp = apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type); 1243 if (vecp == NULL) 1244 return (PSM_FAILURE); 1245 1246 *result = apix_intx_get_shared(vecp->v_inum); 1247 break; 1248 case PSM_INTR_OP_SET_PRI: 1249 /* 1250 * Called prior to adding the interrupt handler or when 1251 * an interrupt handler is unassigned. 1252 */ 1253 if (hdlp->ih_type == DDI_INTR_TYPE_FIXED) 1254 return (PSM_SUCCESS); 1255 1256 if (apix_get_dev_map(dip, hdlp->ih_inum, hdlp->ih_type) == NULL) 1257 return (PSM_FAILURE); 1258 1259 break; 1260 case PSM_INTR_OP_SET_CPU: 1261 case PSM_INTR_OP_GRP_SET_CPU: 1262 /* 1263 * The interrupt handle given here has been allocated 1264 * specifically for this command, and ih_private carries 1265 * a CPU value. 1266 */ 1267 *result = EINVAL; 1268 target = (int)(intptr_t)hdlp->ih_private; 1269 if (!apic_cpu_in_range(target)) { 1270 DDI_INTR_IMPLDBG((CE_WARN, 1271 "[grp_]set_cpu: cpu out of range: %d\n", target)); 1272 return (PSM_FAILURE); 1273 } 1274 1275 lock_set(&apix_lock); 1276 1277 vecp = apix_get_req_vector(hdlp, hdlp->ih_flags); 1278 if (!IS_VECT_ENABLED(vecp)) { 1279 DDI_INTR_IMPLDBG((CE_WARN, 1280 "[grp]_set_cpu: invalid vector 0x%x\n", 1281 hdlp->ih_vector)); 1282 lock_clear(&apix_lock); 1283 return (PSM_FAILURE); 1284 } 1285 1286 *result = 0; 1287 1288 if (intr_op == PSM_INTR_OP_SET_CPU) 1289 newvecp = apix_set_cpu(vecp, target, result); 1290 else 1291 newvecp = apix_grp_set_cpu(vecp, target, result); 1292 1293 lock_clear(&apix_lock); 1294 1295 if (newvecp == NULL) { 1296 *result = EIO; 1297 return (PSM_FAILURE); 1298 } 1299 newvecp->v_bound_cpuid = target; 1300 hdlp->ih_vector = APIX_VIRTVECTOR(newvecp->v_cpuid, 1301 newvecp->v_vector); 1302 break; 1303 1304 case PSM_INTR_OP_GET_INTR: 1305 /* 1306 * The interrupt handle given here has been allocated 1307 * specifically for this command, and ih_private carries 1308 * a pointer to a apic_get_intr_t. 1309 */ 1310 if (apix_get_intr_info(hdlp, hdlp->ih_private) != PSM_SUCCESS) 1311 return (PSM_FAILURE); 1312 break; 1313 1314 case PSM_INTR_OP_CHECK_MSI: 1315 /* 1316 * Check MSI/X is supported or not at APIC level and 1317 * masked off the MSI/X bits in hdlp->ih_type if not 1318 * supported before return. If MSI/X is supported, 1319 * leave the ih_type unchanged and return. 1320 * 1321 * hdlp->ih_type passed in from the nexus has all the 1322 * interrupt types supported by the device. 1323 */ 1324 if (apic_support_msi == 0) { /* uninitialized */ 1325 /* 1326 * if apic_support_msi is not set, call 1327 * apic_check_msi_support() to check whether msi 1328 * is supported first 1329 */ 1330 if (apic_check_msi_support() == PSM_SUCCESS) 1331 apic_support_msi = 1; /* supported */ 1332 else 1333 apic_support_msi = -1; /* not-supported */ 1334 } 1335 if (apic_support_msi == 1) { 1336 if (apic_msix_enable) 1337 *result = hdlp->ih_type; 1338 else 1339 *result = hdlp->ih_type & ~DDI_INTR_TYPE_MSIX; 1340 } else 1341 *result = hdlp->ih_type & ~(DDI_INTR_TYPE_MSI | 1342 DDI_INTR_TYPE_MSIX); 1343 break; 1344 case PSM_INTR_OP_GET_CAP: 1345 cap = DDI_INTR_FLAG_PENDING; 1346 if (hdlp->ih_type == DDI_INTR_TYPE_FIXED) 1347 cap |= DDI_INTR_FLAG_MASKABLE; 1348 *result = cap; 1349 break; 1350 case PSM_INTR_OP_APIC_TYPE: 1351 ((apic_get_type_t *)(hdlp->ih_private))->avgi_type = 1352 apix_get_apic_type(); 1353 ((apic_get_type_t *)(hdlp->ih_private))->avgi_num_intr = 1354 APIX_IPI_MIN; 1355 ((apic_get_type_t *)(hdlp->ih_private))->avgi_num_cpu = 1356 apic_nproc; 1357 hdlp->ih_ver = apic_get_apic_version(); 1358 break; 1359 case PSM_INTR_OP_SET_CAP: 1360 default: 1361 return (PSM_FAILURE); 1362 } 1363 1364 return (PSM_SUCCESS); 1365 } 1366 1367 static void 1368 apix_cleanup_busy(void) 1369 { 1370 int i, j; 1371 apix_vector_t *vecp; 1372 1373 for (i = 0; i < apic_nproc; i++) { 1374 if (!apic_cpu_in_range(i)) 1375 continue; 1376 apic_cpus[i].aci_busy = 0; 1377 for (j = APIX_AVINTR_MIN; j < APIX_AVINTR_MAX; j++) { 1378 if ((vecp = xv_vector(i, j)) != NULL) 1379 vecp->v_busy = 0; 1380 } 1381 } 1382 } 1383 1384 static void 1385 apix_redistribute_compute(void) 1386 { 1387 int i, j, max_busy; 1388 1389 if (!apic_enable_dynamic_migration) 1390 return; 1391 1392 if (++apic_nticks == apic_sample_factor_redistribution) { 1393 /* 1394 * Time to call apic_intr_redistribute(). 1395 * reset apic_nticks. This will cause max_busy 1396 * to be calculated below and if it is more than 1397 * apic_int_busy, we will do the whole thing 1398 */ 1399 apic_nticks = 0; 1400 } 1401 max_busy = 0; 1402 for (i = 0; i < apic_nproc; i++) { 1403 if (!apic_cpu_in_range(i)) 1404 continue; 1405 /* 1406 * Check if curipl is non zero & if ISR is in 1407 * progress 1408 */ 1409 if (((j = apic_cpus[i].aci_curipl) != 0) && 1410 (apic_cpus[i].aci_ISR_in_progress & (1 << j))) { 1411 1412 int vect; 1413 apic_cpus[i].aci_busy++; 1414 vect = apic_cpus[i].aci_current[j]; 1415 apixs[i]->x_vectbl[vect]->v_busy++; 1416 } 1417 1418 if (!apic_nticks && 1419 (apic_cpus[i].aci_busy > max_busy)) 1420 max_busy = apic_cpus[i].aci_busy; 1421 } 1422 if (!apic_nticks) { 1423 if (max_busy > apic_int_busy_mark) { 1424 /* 1425 * We could make the following check be 1426 * skipped > 1 in which case, we get a 1427 * redistribution at half the busy mark (due to 1428 * double interval). Need to be able to collect 1429 * more empirical data to decide if that is a 1430 * good strategy. Punt for now. 1431 */ 1432 apix_cleanup_busy(); 1433 apic_skipped_redistribute = 0; 1434 } else 1435 apic_skipped_redistribute++; 1436 } 1437 } 1438 1439 /* 1440 * intr_ops() service routines 1441 */ 1442 1443 static int 1444 apix_get_pending(apix_vector_t *vecp) 1445 { 1446 int bit, index, irr, pending; 1447 1448 /* need to get on the bound cpu */ 1449 mutex_enter(&cpu_lock); 1450 affinity_set(vecp->v_cpuid); 1451 1452 index = vecp->v_vector / 32; 1453 bit = vecp->v_vector % 32; 1454 irr = apic_reg_ops->apic_read(APIC_IRR_REG + index); 1455 1456 affinity_clear(); 1457 mutex_exit(&cpu_lock); 1458 1459 pending = (irr & (1 << bit)) ? 1 : 0; 1460 if (!pending && vecp->v_type == APIX_TYPE_FIXED) 1461 pending = apix_intx_get_pending(vecp->v_inum); 1462 1463 return (pending); 1464 } 1465 1466 static apix_vector_t * 1467 apix_get_req_vector(ddi_intr_handle_impl_t *hdlp, ushort_t flags) 1468 { 1469 apix_vector_t *vecp; 1470 processorid_t cpuid; 1471 int32_t virt_vec = 0; 1472 1473 switch (flags & PSMGI_INTRBY_FLAGS) { 1474 case PSMGI_INTRBY_IRQ: 1475 return (apix_intx_get_vector(hdlp->ih_vector)); 1476 case PSMGI_INTRBY_VEC: 1477 virt_vec = (virt_vec == 0) ? hdlp->ih_vector : virt_vec; 1478 1479 cpuid = APIX_VIRTVEC_CPU(virt_vec); 1480 if (!apic_cpu_in_range(cpuid)) 1481 return (NULL); 1482 1483 vecp = xv_vector(cpuid, APIX_VIRTVEC_VECTOR(virt_vec)); 1484 break; 1485 case PSMGI_INTRBY_DEFAULT: 1486 vecp = apix_get_dev_map(hdlp->ih_dip, hdlp->ih_inum, 1487 hdlp->ih_type); 1488 break; 1489 default: 1490 return (NULL); 1491 } 1492 1493 return (vecp); 1494 } 1495 1496 static int 1497 apix_get_intr_info(ddi_intr_handle_impl_t *hdlp, 1498 apic_get_intr_t *intr_params_p) 1499 { 1500 apix_vector_t *vecp; 1501 struct autovec *av_dev; 1502 int i; 1503 1504 vecp = apix_get_req_vector(hdlp, intr_params_p->avgi_req_flags); 1505 if (IS_VECT_FREE(vecp)) { 1506 intr_params_p->avgi_num_devs = 0; 1507 intr_params_p->avgi_cpu_id = 0; 1508 intr_params_p->avgi_req_flags = 0; 1509 return (PSM_SUCCESS); 1510 } 1511 1512 if (intr_params_p->avgi_req_flags & PSMGI_REQ_CPUID) { 1513 intr_params_p->avgi_cpu_id = vecp->v_cpuid; 1514 1515 /* Return user bound info for intrd. */ 1516 if (intr_params_p->avgi_cpu_id & IRQ_USER_BOUND) { 1517 intr_params_p->avgi_cpu_id &= ~IRQ_USER_BOUND; 1518 intr_params_p->avgi_cpu_id |= PSMGI_CPU_USER_BOUND; 1519 } 1520 } 1521 1522 if (intr_params_p->avgi_req_flags & PSMGI_REQ_VECTOR) 1523 intr_params_p->avgi_vector = vecp->v_vector; 1524 1525 if (intr_params_p->avgi_req_flags & 1526 (PSMGI_REQ_NUM_DEVS | PSMGI_REQ_GET_DEVS)) 1527 /* Get number of devices from apic_irq table shared field. */ 1528 intr_params_p->avgi_num_devs = vecp->v_share; 1529 1530 if (intr_params_p->avgi_req_flags & PSMGI_REQ_GET_DEVS) { 1531 1532 intr_params_p->avgi_req_flags |= PSMGI_REQ_NUM_DEVS; 1533 1534 /* Some devices have NULL dip. Don't count these. */ 1535 if (intr_params_p->avgi_num_devs > 0) { 1536 for (i = 0, av_dev = vecp->v_autovect; av_dev; 1537 av_dev = av_dev->av_link) { 1538 if (av_dev->av_vector && av_dev->av_dip) 1539 i++; 1540 } 1541 intr_params_p->avgi_num_devs = 1542 (uint8_t)MIN(intr_params_p->avgi_num_devs, i); 1543 } 1544 1545 /* There are no viable dips to return. */ 1546 if (intr_params_p->avgi_num_devs == 0) { 1547 intr_params_p->avgi_dip_list = NULL; 1548 1549 } else { /* Return list of dips */ 1550 1551 /* Allocate space in array for that number of devs. */ 1552 intr_params_p->avgi_dip_list = kmem_zalloc( 1553 intr_params_p->avgi_num_devs * 1554 sizeof (dev_info_t *), 1555 KM_NOSLEEP); 1556 if (intr_params_p->avgi_dip_list == NULL) { 1557 DDI_INTR_IMPLDBG((CE_WARN, 1558 "apix_get_vector_intr_info: no memory")); 1559 return (PSM_FAILURE); 1560 } 1561 1562 /* 1563 * Loop through the device list of the autovec table 1564 * filling in the dip array. 1565 * 1566 * Note that the autovect table may have some special 1567 * entries which contain NULL dips. These will be 1568 * ignored. 1569 */ 1570 for (i = 0, av_dev = vecp->v_autovect; av_dev; 1571 av_dev = av_dev->av_link) { 1572 if (av_dev->av_vector && av_dev->av_dip) 1573 intr_params_p->avgi_dip_list[i++] = 1574 av_dev->av_dip; 1575 } 1576 } 1577 } 1578 1579 return (PSM_SUCCESS); 1580 } 1581 1582 static char * 1583 apix_get_apic_type(void) 1584 { 1585 return (apix_psm_info.p_mach_idstring); 1586 } 1587 1588 apix_vector_t * 1589 apix_set_cpu(apix_vector_t *vecp, int new_cpu, int *result) 1590 { 1591 apix_vector_t *newp = NULL; 1592 dev_info_t *dip; 1593 int inum, cap_ptr; 1594 ddi_acc_handle_t handle; 1595 ddi_intr_msix_t *msix_p = NULL; 1596 ushort_t msix_ctrl; 1597 uintptr_t off; 1598 uint32_t mask; 1599 1600 ASSERT(LOCK_HELD(&apix_lock)); 1601 *result = ENXIO; 1602 1603 /* Fail if this is an MSI intr and is part of a group. */ 1604 if (vecp->v_type == APIX_TYPE_MSI) { 1605 if (i_ddi_intr_get_current_nintrs(APIX_GET_DIP(vecp)) > 1) 1606 return (NULL); 1607 else 1608 return (apix_grp_set_cpu(vecp, new_cpu, result)); 1609 } 1610 1611 /* 1612 * Mask MSI-X. It's unmasked when MSI-X gets enabled. 1613 */ 1614 if (vecp->v_type == APIX_TYPE_MSIX && IS_VECT_ENABLED(vecp)) { 1615 if ((dip = APIX_GET_DIP(vecp)) == NULL) 1616 return (NULL); 1617 inum = vecp->v_devp->dv_inum; 1618 1619 handle = i_ddi_get_pci_config_handle(dip); 1620 cap_ptr = i_ddi_get_msi_msix_cap_ptr(dip); 1621 msix_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSIX_CTRL); 1622 if ((msix_ctrl & PCI_MSIX_FUNCTION_MASK) == 0) { 1623 /* 1624 * Function is not masked, then mask "inum"th 1625 * entry in the MSI-X table 1626 */ 1627 msix_p = i_ddi_get_msix(dip); 1628 off = (uintptr_t)msix_p->msix_tbl_addr + (inum * 1629 PCI_MSIX_VECTOR_SIZE) + PCI_MSIX_VECTOR_CTRL_OFFSET; 1630 mask = ddi_get32(msix_p->msix_tbl_hdl, (uint32_t *)off); 1631 ddi_put32(msix_p->msix_tbl_hdl, (uint32_t *)off, 1632 mask | 1); 1633 } 1634 } 1635 1636 *result = 0; 1637 if ((newp = apix_rebind(vecp, new_cpu, 1)) == NULL) 1638 *result = EIO; 1639 1640 /* Restore mask bit */ 1641 if (msix_p != NULL) 1642 ddi_put32(msix_p->msix_tbl_hdl, (uint32_t *)off, mask); 1643 1644 return (newp); 1645 } 1646 1647 /* 1648 * Set cpu for MSIs 1649 */ 1650 apix_vector_t * 1651 apix_grp_set_cpu(apix_vector_t *vecp, int new_cpu, int *result) 1652 { 1653 apix_vector_t *newp, *vp; 1654 uint32_t orig_cpu = vecp->v_cpuid; 1655 int orig_vect = vecp->v_vector; 1656 int i, num_vectors, cap_ptr, msi_mask_off; 1657 uint32_t msi_pvm; 1658 ushort_t msi_ctrl; 1659 ddi_acc_handle_t handle; 1660 dev_info_t *dip; 1661 1662 APIC_VERBOSE(INTR, (CE_CONT, "apix_grp_set_cpu: oldcpu: %x, vector: %x," 1663 " newcpu:%x\n", vecp->v_cpuid, vecp->v_vector, new_cpu)); 1664 1665 ASSERT(LOCK_HELD(&apix_lock)); 1666 1667 *result = ENXIO; 1668 1669 if (vecp->v_type != APIX_TYPE_MSI) { 1670 DDI_INTR_IMPLDBG((CE_WARN, "set_grp: intr not MSI\n")); 1671 return (NULL); 1672 } 1673 1674 if ((dip = APIX_GET_DIP(vecp)) == NULL) 1675 return (NULL); 1676 1677 num_vectors = i_ddi_intr_get_current_nintrs(dip); 1678 if ((num_vectors < 1) || ((num_vectors - 1) & orig_vect)) { 1679 APIC_VERBOSE(INTR, (CE_WARN, 1680 "set_grp: base vec not part of a grp or not aligned: " 1681 "vec:0x%x, num_vec:0x%x\n", orig_vect, num_vectors)); 1682 return (NULL); 1683 } 1684 1685 if (vecp->v_inum != apix_get_min_dev_inum(dip, vecp->v_type)) 1686 return (NULL); 1687 1688 *result = EIO; 1689 for (i = 1; i < num_vectors; i++) { 1690 if ((vp = xv_vector(orig_cpu, orig_vect + i)) == NULL) 1691 return (NULL); 1692 #ifdef DEBUG 1693 /* 1694 * Sanity check: CPU and dip is the same for all entries. 1695 * May be called when first msi to be enabled, at this time 1696 * add_avintr() is not called for other msi 1697 */ 1698 if ((vp->v_share != 0) && 1699 ((APIX_GET_DIP(vp) != dip) || 1700 (vp->v_cpuid != vecp->v_cpuid))) { 1701 APIC_VERBOSE(INTR, (CE_WARN, 1702 "set_grp: cpu or dip for vec 0x%x difft than for " 1703 "vec 0x%x\n", orig_vect, orig_vect + i)); 1704 APIC_VERBOSE(INTR, (CE_WARN, 1705 " cpu: %d vs %d, dip: 0x%p vs 0x%p\n", orig_cpu, 1706 vp->v_cpuid, (void *)dip, 1707 (void *)APIX_GET_DIP(vp))); 1708 return (NULL); 1709 } 1710 #endif /* DEBUG */ 1711 } 1712 1713 cap_ptr = i_ddi_get_msi_msix_cap_ptr(dip); 1714 handle = i_ddi_get_pci_config_handle(dip); 1715 msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL); 1716 1717 /* MSI Per vector masking is supported. */ 1718 if (msi_ctrl & PCI_MSI_PVM_MASK) { 1719 if (msi_ctrl & PCI_MSI_64BIT_MASK) 1720 msi_mask_off = cap_ptr + PCI_MSI_64BIT_MASKBITS; 1721 else 1722 msi_mask_off = cap_ptr + PCI_MSI_32BIT_MASK; 1723 msi_pvm = pci_config_get32(handle, msi_mask_off); 1724 pci_config_put32(handle, msi_mask_off, (uint32_t)-1); 1725 APIC_VERBOSE(INTR, (CE_CONT, 1726 "set_grp: pvm supported. Mask set to 0x%x\n", 1727 pci_config_get32(handle, msi_mask_off))); 1728 } 1729 1730 if ((newp = apix_rebind(vecp, new_cpu, num_vectors)) != NULL) 1731 *result = 0; 1732 1733 /* Reenable vectors if per vector masking is supported. */ 1734 if (msi_ctrl & PCI_MSI_PVM_MASK) { 1735 pci_config_put32(handle, msi_mask_off, msi_pvm); 1736 APIC_VERBOSE(INTR, (CE_CONT, 1737 "set_grp: pvm supported. Mask restored to 0x%x\n", 1738 pci_config_get32(handle, msi_mask_off))); 1739 } 1740 1741 return (newp); 1742 } 1743 1744 void 1745 apix_intx_set_vector(int irqno, uint32_t cpuid, uchar_t vector) 1746 { 1747 apic_irq_t *irqp; 1748 1749 mutex_enter(&airq_mutex); 1750 irqp = apic_irq_table[irqno]; 1751 irqp->airq_cpu = cpuid; 1752 irqp->airq_vector = vector; 1753 apic_record_rdt_entry(irqp, irqno); 1754 mutex_exit(&airq_mutex); 1755 } 1756 1757 apix_vector_t * 1758 apix_intx_get_vector(int irqno) 1759 { 1760 apic_irq_t *irqp; 1761 uint32_t cpuid; 1762 uchar_t vector; 1763 1764 mutex_enter(&airq_mutex); 1765 irqp = apic_irq_table[irqno & 0xff]; 1766 if (IS_IRQ_FREE(irqp) || (irqp->airq_cpu == IRQ_UNINIT)) { 1767 mutex_exit(&airq_mutex); 1768 return (NULL); 1769 } 1770 cpuid = irqp->airq_cpu; 1771 vector = irqp->airq_vector; 1772 mutex_exit(&airq_mutex); 1773 1774 return (xv_vector(cpuid, vector)); 1775 } 1776 1777 /* 1778 * Must called with interrupts disabled and apic_ioapic_lock held 1779 */ 1780 void 1781 apix_intx_enable(int irqno) 1782 { 1783 uchar_t ioapicindex, intin; 1784 apic_irq_t *irqp = apic_irq_table[irqno]; 1785 ioapic_rdt_t irdt; 1786 apic_cpus_info_t *cpu_infop; 1787 apix_vector_t *vecp = xv_vector(irqp->airq_cpu, irqp->airq_vector); 1788 1789 ASSERT(LOCK_HELD(&apic_ioapic_lock) && !IS_IRQ_FREE(irqp)); 1790 1791 ioapicindex = irqp->airq_ioapicindex; 1792 intin = irqp->airq_intin_no; 1793 cpu_infop = &apic_cpus[irqp->airq_cpu]; 1794 1795 irdt.ir_lo = AV_PDEST | AV_FIXED | irqp->airq_rdt_entry; 1796 irdt.ir_hi = cpu_infop->aci_local_id; 1797 1798 apic_vt_ops->apic_intrmap_alloc_entry(&vecp->v_intrmap_private, NULL, 1799 vecp->v_type, 1, ioapicindex); 1800 apic_vt_ops->apic_intrmap_map_entry(vecp->v_intrmap_private, 1801 (void *)&irdt, vecp->v_type, 1); 1802 apic_vt_ops->apic_intrmap_record_rdt(vecp->v_intrmap_private, &irdt); 1803 1804 /* write RDT entry high dword - destination */ 1805 WRITE_IOAPIC_RDT_ENTRY_HIGH_DWORD(ioapicindex, intin, 1806 irdt.ir_hi); 1807 1808 /* Write the vector, trigger, and polarity portion of the RDT */ 1809 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapicindex, intin, irdt.ir_lo); 1810 1811 vecp->v_state = APIX_STATE_ENABLED; 1812 1813 APIC_VERBOSE_IOAPIC((CE_CONT, "apix_intx_enable: ioapic 0x%x" 1814 " intin 0x%x rdt_low 0x%x rdt_high 0x%x\n", 1815 ioapicindex, intin, irdt.ir_lo, irdt.ir_hi)); 1816 } 1817 1818 /* 1819 * Must called with interrupts disabled and apic_ioapic_lock held 1820 */ 1821 void 1822 apix_intx_disable(int irqno) 1823 { 1824 apic_irq_t *irqp = apic_irq_table[irqno]; 1825 int ioapicindex, intin; 1826 1827 ASSERT(LOCK_HELD(&apic_ioapic_lock) && !IS_IRQ_FREE(irqp)); 1828 /* 1829 * The assumption here is that this is safe, even for 1830 * systems with IOAPICs that suffer from the hardware 1831 * erratum because all devices have been quiesced before 1832 * they unregister their interrupt handlers. If that 1833 * assumption turns out to be false, this mask operation 1834 * can induce the same erratum result we're trying to 1835 * avoid. 1836 */ 1837 ioapicindex = irqp->airq_ioapicindex; 1838 intin = irqp->airq_intin_no; 1839 ioapic_write(ioapicindex, APIC_RDT_CMD + 2 * intin, AV_MASK); 1840 1841 APIC_VERBOSE_IOAPIC((CE_CONT, "apix_intx_disable: ioapic 0x%x" 1842 " intin 0x%x\n", ioapicindex, intin)); 1843 } 1844 1845 void 1846 apix_intx_free(int irqno) 1847 { 1848 apic_irq_t *irqp; 1849 1850 mutex_enter(&airq_mutex); 1851 irqp = apic_irq_table[irqno]; 1852 1853 if (IS_IRQ_FREE(irqp)) { 1854 mutex_exit(&airq_mutex); 1855 return; 1856 } 1857 1858 irqp->airq_mps_intr_index = FREE_INDEX; 1859 irqp->airq_cpu = IRQ_UNINIT; 1860 irqp->airq_vector = APIX_INVALID_VECT; 1861 mutex_exit(&airq_mutex); 1862 } 1863 1864 #ifdef DEBUG 1865 int apix_intr_deliver_timeouts = 0; 1866 int apix_intr_rirr_timeouts = 0; 1867 int apix_intr_rirr_reset_failure = 0; 1868 #endif 1869 int apix_max_reps_irr_pending = 10; 1870 1871 #define GET_RDT_BITS(ioapic, intin, bits) \ 1872 (READ_IOAPIC_RDT_ENTRY_LOW_DWORD((ioapic), (intin)) & (bits)) 1873 #define APIX_CHECK_IRR_DELAY drv_usectohz(5000) 1874 1875 int 1876 apix_intx_rebind(int irqno, processorid_t cpuid, uchar_t vector) 1877 { 1878 apic_irq_t *irqp = apic_irq_table[irqno]; 1879 ulong_t iflag; 1880 int waited, ioapic_ix, intin_no, level, repeats, rdt_entry, masked; 1881 1882 ASSERT(irqp != NULL); 1883 1884 iflag = intr_clear(); 1885 lock_set(&apic_ioapic_lock); 1886 1887 ioapic_ix = irqp->airq_ioapicindex; 1888 intin_no = irqp->airq_intin_no; 1889 level = apic_level_intr[irqno]; 1890 1891 /* 1892 * Wait for the delivery status bit to be cleared. This should 1893 * be a very small amount of time. 1894 */ 1895 repeats = 0; 1896 do { 1897 repeats++; 1898 1899 for (waited = 0; waited < apic_max_reps_clear_pending; 1900 waited++) { 1901 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_PENDING) == 0) 1902 break; 1903 } 1904 if (!level) 1905 break; 1906 1907 /* 1908 * Mask the RDT entry for level-triggered interrupts. 1909 */ 1910 irqp->airq_rdt_entry |= AV_MASK; 1911 rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1912 intin_no); 1913 if ((masked = (rdt_entry & AV_MASK)) == 0) { 1914 /* Mask it */ 1915 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no, 1916 AV_MASK | rdt_entry); 1917 } 1918 1919 /* 1920 * If there was a race and an interrupt was injected 1921 * just before we masked, check for that case here. 1922 * Then, unmask the RDT entry and try again. If we're 1923 * on our last try, don't unmask (because we want the 1924 * RDT entry to remain masked for the rest of the 1925 * function). 1926 */ 1927 rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1928 intin_no); 1929 if ((masked == 0) && ((rdt_entry & AV_PENDING) != 0) && 1930 (repeats < apic_max_reps_clear_pending)) { 1931 /* Unmask it */ 1932 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1933 intin_no, rdt_entry & ~AV_MASK); 1934 irqp->airq_rdt_entry &= ~AV_MASK; 1935 } 1936 } while ((rdt_entry & AV_PENDING) && 1937 (repeats < apic_max_reps_clear_pending)); 1938 1939 #ifdef DEBUG 1940 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_PENDING) != 0) 1941 apix_intr_deliver_timeouts++; 1942 #endif 1943 1944 if (!level || !APIX_IS_MASK_RDT(apix_mul_ioapic_method)) 1945 goto done; 1946 1947 /* 1948 * wait for remote IRR to be cleared for level-triggered 1949 * interrupts 1950 */ 1951 repeats = 0; 1952 do { 1953 repeats++; 1954 1955 for (waited = 0; waited < apic_max_reps_clear_pending; 1956 waited++) { 1957 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_REMOTE_IRR) 1958 == 0) 1959 break; 1960 } 1961 1962 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_REMOTE_IRR) != 0) { 1963 lock_clear(&apic_ioapic_lock); 1964 intr_restore(iflag); 1965 1966 delay(APIX_CHECK_IRR_DELAY); 1967 1968 iflag = intr_clear(); 1969 lock_set(&apic_ioapic_lock); 1970 } 1971 } while (repeats < apix_max_reps_irr_pending); 1972 1973 if (repeats >= apix_max_reps_irr_pending) { 1974 #ifdef DEBUG 1975 apix_intr_rirr_timeouts++; 1976 #endif 1977 1978 /* 1979 * If we waited and the Remote IRR bit is still not cleared, 1980 * AND if we've invoked the timeout APIC_REPROGRAM_MAX_TIMEOUTS 1981 * times for this interrupt, try the last-ditch workaround: 1982 */ 1983 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_REMOTE_IRR) != 0) { 1984 /* 1985 * Trying to clear the bit through normal 1986 * channels has failed. So as a last-ditch 1987 * effort, try to set the trigger mode to 1988 * edge, then to level. This has been 1989 * observed to work on many systems. 1990 */ 1991 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1992 intin_no, 1993 READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1994 intin_no) & ~AV_LEVEL); 1995 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1996 intin_no, 1997 READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, 1998 intin_no) | AV_LEVEL); 1999 } 2000 2001 if (GET_RDT_BITS(ioapic_ix, intin_no, AV_REMOTE_IRR) != 0) { 2002 #ifdef DEBUG 2003 apix_intr_rirr_reset_failure++; 2004 #endif 2005 lock_clear(&apic_ioapic_lock); 2006 intr_restore(iflag); 2007 prom_printf("apix: Remote IRR still " 2008 "not clear for IOAPIC %d intin %d.\n" 2009 "\tInterrupts to this pin may cease " 2010 "functioning.\n", ioapic_ix, intin_no); 2011 return (1); /* return failure */ 2012 } 2013 } 2014 2015 done: 2016 /* change apic_irq_table */ 2017 lock_clear(&apic_ioapic_lock); 2018 intr_restore(iflag); 2019 apix_intx_set_vector(irqno, cpuid, vector); 2020 iflag = intr_clear(); 2021 lock_set(&apic_ioapic_lock); 2022 2023 /* reprogramme IO-APIC RDT entry */ 2024 apix_intx_enable(irqno); 2025 2026 lock_clear(&apic_ioapic_lock); 2027 intr_restore(iflag); 2028 2029 return (0); 2030 } 2031 2032 static int 2033 apix_intx_get_pending(int irqno) 2034 { 2035 apic_irq_t *irqp; 2036 int intin, ioapicindex, pending; 2037 ulong_t iflag; 2038 2039 mutex_enter(&airq_mutex); 2040 irqp = apic_irq_table[irqno]; 2041 if (IS_IRQ_FREE(irqp)) { 2042 mutex_exit(&airq_mutex); 2043 return (0); 2044 } 2045 2046 /* check IO-APIC delivery status */ 2047 intin = irqp->airq_intin_no; 2048 ioapicindex = irqp->airq_ioapicindex; 2049 mutex_exit(&airq_mutex); 2050 2051 iflag = intr_clear(); 2052 lock_set(&apic_ioapic_lock); 2053 2054 pending = (READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapicindex, intin) & 2055 AV_PENDING) ? 1 : 0; 2056 2057 lock_clear(&apic_ioapic_lock); 2058 intr_restore(iflag); 2059 2060 return (pending); 2061 } 2062 2063 /* 2064 * This function will mask the interrupt on the I/O APIC 2065 */ 2066 static void 2067 apix_intx_set_mask(int irqno) 2068 { 2069 int intin, ioapixindex, rdt_entry; 2070 ulong_t iflag; 2071 apic_irq_t *irqp; 2072 2073 mutex_enter(&airq_mutex); 2074 irqp = apic_irq_table[irqno]; 2075 2076 ASSERT(irqp->airq_mps_intr_index != FREE_INDEX); 2077 2078 intin = irqp->airq_intin_no; 2079 ioapixindex = irqp->airq_ioapicindex; 2080 mutex_exit(&airq_mutex); 2081 2082 iflag = intr_clear(); 2083 lock_set(&apic_ioapic_lock); 2084 2085 rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapixindex, intin); 2086 2087 /* clear mask */ 2088 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapixindex, intin, 2089 (AV_MASK | rdt_entry)); 2090 2091 lock_clear(&apic_ioapic_lock); 2092 intr_restore(iflag); 2093 } 2094 2095 /* 2096 * This function will clear the mask for the interrupt on the I/O APIC 2097 */ 2098 static void 2099 apix_intx_clear_mask(int irqno) 2100 { 2101 int intin, ioapixindex, rdt_entry; 2102 ulong_t iflag; 2103 apic_irq_t *irqp; 2104 2105 mutex_enter(&airq_mutex); 2106 irqp = apic_irq_table[irqno]; 2107 2108 ASSERT(irqp->airq_mps_intr_index != FREE_INDEX); 2109 2110 intin = irqp->airq_intin_no; 2111 ioapixindex = irqp->airq_ioapicindex; 2112 mutex_exit(&airq_mutex); 2113 2114 iflag = intr_clear(); 2115 lock_set(&apic_ioapic_lock); 2116 2117 rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapixindex, intin); 2118 2119 /* clear mask */ 2120 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapixindex, intin, 2121 ((~AV_MASK) & rdt_entry)); 2122 2123 lock_clear(&apic_ioapic_lock); 2124 intr_restore(iflag); 2125 } 2126 2127 /* 2128 * For level-triggered interrupt, mask the IRQ line. Mask means 2129 * new interrupts will not be delivered. The interrupt already 2130 * accepted by a local APIC is not affected 2131 */ 2132 void 2133 apix_level_intr_pre_eoi(int irq) 2134 { 2135 apic_irq_t *irqp = apic_irq_table[irq]; 2136 int apic_ix, intin_ix; 2137 2138 if (irqp == NULL) 2139 return; 2140 2141 ASSERT(apic_level_intr[irq] == TRIGGER_MODE_LEVEL); 2142 2143 lock_set(&apic_ioapic_lock); 2144 2145 intin_ix = irqp->airq_intin_no; 2146 apic_ix = irqp->airq_ioapicindex; 2147 2148 if (irqp->airq_cpu != CPU->cpu_id) { 2149 if (!APIX_IS_MASK_RDT(apix_mul_ioapic_method)) 2150 ioapic_write_eoi(apic_ix, irqp->airq_vector); 2151 lock_clear(&apic_ioapic_lock); 2152 return; 2153 } 2154 2155 if (apix_mul_ioapic_method == APIC_MUL_IOAPIC_IOXAPIC) { 2156 /* 2157 * This is a IOxAPIC and there is EOI register: 2158 * Change the vector to reserved unused vector, so that 2159 * the EOI from Local APIC won't clear the Remote IRR for 2160 * this level trigger interrupt. Instead, we'll manually 2161 * clear it in apix_post_hardint() after ISR handling. 2162 */ 2163 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_ix, 2164 (irqp->airq_rdt_entry & (~0xff)) | APIX_RESV_VECTOR); 2165 } else { 2166 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_ix, 2167 AV_MASK | irqp->airq_rdt_entry); 2168 } 2169 2170 lock_clear(&apic_ioapic_lock); 2171 } 2172 2173 /* 2174 * For level-triggered interrupt, unmask the IRQ line 2175 * or restore the original vector number. 2176 */ 2177 void 2178 apix_level_intr_post_dispatch(int irq) 2179 { 2180 apic_irq_t *irqp = apic_irq_table[irq]; 2181 int apic_ix, intin_ix; 2182 2183 if (irqp == NULL) 2184 return; 2185 2186 lock_set(&apic_ioapic_lock); 2187 2188 intin_ix = irqp->airq_intin_no; 2189 apic_ix = irqp->airq_ioapicindex; 2190 2191 if (APIX_IS_DIRECTED_EOI(apix_mul_ioapic_method)) { 2192 /* 2193 * Already sent EOI back to Local APIC. 2194 * Send EOI to IO-APIC 2195 */ 2196 ioapic_write_eoi(apic_ix, irqp->airq_vector); 2197 } else { 2198 /* clear the mask or restore the vector */ 2199 WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_ix, 2200 irqp->airq_rdt_entry); 2201 2202 /* send EOI to IOxAPIC */ 2203 if (apix_mul_ioapic_method == APIC_MUL_IOAPIC_IOXAPIC) 2204 ioapic_write_eoi(apic_ix, irqp->airq_vector); 2205 } 2206 2207 lock_clear(&apic_ioapic_lock); 2208 } 2209 2210 static int 2211 apix_intx_get_shared(int irqno) 2212 { 2213 apic_irq_t *irqp; 2214 int share; 2215 2216 mutex_enter(&airq_mutex); 2217 irqp = apic_irq_table[irqno]; 2218 if (IS_IRQ_FREE(irqp) || (irqp->airq_cpu == IRQ_UNINIT)) { 2219 mutex_exit(&airq_mutex); 2220 return (0); 2221 } 2222 share = irqp->airq_share; 2223 mutex_exit(&airq_mutex); 2224 2225 return (share); 2226 } 2227 2228 static void 2229 apix_intx_set_shared(int irqno, int delta) 2230 { 2231 apic_irq_t *irqp; 2232 2233 mutex_enter(&airq_mutex); 2234 irqp = apic_irq_table[irqno]; 2235 if (IS_IRQ_FREE(irqp)) { 2236 mutex_exit(&airq_mutex); 2237 return; 2238 } 2239 irqp->airq_share += delta; 2240 mutex_exit(&airq_mutex); 2241 } 2242 2243 /* 2244 * Setup IRQ table. Return IRQ no or -1 on failure 2245 */ 2246 static int 2247 apix_intx_setup(dev_info_t *dip, int inum, int irqno, 2248 struct apic_io_intr *intrp, struct intrspec *ispec, iflag_t *iflagp) 2249 { 2250 int origirq = ispec->intrspec_vec; 2251 int newirq; 2252 short intr_index; 2253 uchar_t ipin, ioapic, ioapicindex; 2254 apic_irq_t *irqp; 2255 2256 UNREFERENCED_1PARAMETER(inum); 2257 2258 if (intrp != NULL) { 2259 intr_index = (short)(intrp - apic_io_intrp); 2260 ioapic = intrp->intr_destid; 2261 ipin = intrp->intr_destintin; 2262 2263 /* Find ioapicindex. If destid was ALL, we will exit with 0. */ 2264 for (ioapicindex = apic_io_max - 1; ioapicindex; ioapicindex--) 2265 if (apic_io_id[ioapicindex] == ioapic) 2266 break; 2267 ASSERT((ioapic == apic_io_id[ioapicindex]) || 2268 (ioapic == INTR_ALL_APIC)); 2269 2270 /* check whether this intin# has been used by another irqno */ 2271 if ((newirq = apic_find_intin(ioapicindex, ipin)) != -1) 2272 return (newirq); 2273 2274 } else if (iflagp != NULL) { /* ACPI */ 2275 intr_index = ACPI_INDEX; 2276 ioapicindex = acpi_find_ioapic(irqno); 2277 ASSERT(ioapicindex != 0xFF); 2278 ioapic = apic_io_id[ioapicindex]; 2279 ipin = irqno - apic_io_vectbase[ioapicindex]; 2280 2281 if (apic_irq_table[irqno] && 2282 apic_irq_table[irqno]->airq_mps_intr_index == ACPI_INDEX) { 2283 ASSERT(apic_irq_table[irqno]->airq_intin_no == ipin && 2284 apic_irq_table[irqno]->airq_ioapicindex == 2285 ioapicindex); 2286 return (irqno); 2287 } 2288 2289 } else { /* default configuration */ 2290 intr_index = DEFAULT_INDEX; 2291 ioapicindex = 0; 2292 ioapic = apic_io_id[ioapicindex]; 2293 ipin = (uchar_t)irqno; 2294 } 2295 2296 /* allocate a new IRQ no */ 2297 if ((irqp = apic_irq_table[irqno]) == NULL) { 2298 irqp = kmem_zalloc(sizeof (apic_irq_t), KM_SLEEP); 2299 apic_irq_table[irqno] = irqp; 2300 } else { 2301 if (irqp->airq_mps_intr_index != FREE_INDEX) { 2302 newirq = apic_allocate_irq(apic_first_avail_irq); 2303 if (newirq == -1) { 2304 return (-1); 2305 } 2306 irqno = newirq; 2307 irqp = apic_irq_table[irqno]; 2308 ASSERT(irqp != NULL); 2309 } 2310 } 2311 apic_max_device_irq = max(irqno, apic_max_device_irq); 2312 apic_min_device_irq = min(irqno, apic_min_device_irq); 2313 2314 irqp->airq_mps_intr_index = intr_index; 2315 irqp->airq_ioapicindex = ioapicindex; 2316 irqp->airq_intin_no = ipin; 2317 irqp->airq_dip = dip; 2318 irqp->airq_origirq = (uchar_t)origirq; 2319 if (iflagp != NULL) 2320 irqp->airq_iflag = *iflagp; 2321 irqp->airq_cpu = IRQ_UNINIT; 2322 irqp->airq_vector = 0; 2323 2324 return (irqno); 2325 } 2326 2327 /* 2328 * Setup IRQ table for non-pci devices. Return IRQ no or -1 on error 2329 */ 2330 static int 2331 apix_intx_setup_nonpci(dev_info_t *dip, int inum, int bustype, 2332 struct intrspec *ispec) 2333 { 2334 int irqno = ispec->intrspec_vec; 2335 int newirq, i; 2336 iflag_t intr_flag; 2337 ACPI_SUBTABLE_HEADER *hp; 2338 ACPI_MADT_INTERRUPT_OVERRIDE *isop; 2339 struct apic_io_intr *intrp; 2340 2341 if (!apic_enable_acpi || apic_use_acpi_madt_only) { 2342 int busid; 2343 2344 if (bustype == 0) 2345 bustype = eisa_level_intr_mask ? BUS_EISA : BUS_ISA; 2346 2347 /* loop checking BUS_ISA/BUS_EISA */ 2348 for (i = 0; i < 2; i++) { 2349 if (((busid = apic_find_bus_id(bustype)) != -1) && 2350 ((intrp = apic_find_io_intr_w_busid(irqno, busid)) 2351 != NULL)) { 2352 return (apix_intx_setup(dip, inum, irqno, 2353 intrp, ispec, NULL)); 2354 } 2355 bustype = (bustype == BUS_EISA) ? BUS_ISA : BUS_EISA; 2356 } 2357 2358 /* fall back to default configuration */ 2359 return (-1); 2360 } 2361 2362 /* search iso entries first */ 2363 if (acpi_iso_cnt != 0) { 2364 hp = (ACPI_SUBTABLE_HEADER *)acpi_isop; 2365 i = 0; 2366 while (i < acpi_iso_cnt) { 2367 if (hp->Type == ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) { 2368 isop = (ACPI_MADT_INTERRUPT_OVERRIDE *) hp; 2369 if (isop->Bus == 0 && 2370 isop->SourceIrq == irqno) { 2371 newirq = isop->GlobalIrq; 2372 intr_flag.intr_po = isop->IntiFlags & 2373 ACPI_MADT_POLARITY_MASK; 2374 intr_flag.intr_el = (isop->IntiFlags & 2375 ACPI_MADT_TRIGGER_MASK) >> 2; 2376 intr_flag.bustype = BUS_ISA; 2377 2378 return (apix_intx_setup(dip, inum, 2379 newirq, NULL, ispec, &intr_flag)); 2380 } 2381 i++; 2382 } 2383 hp = (ACPI_SUBTABLE_HEADER *)(((char *)hp) + 2384 hp->Length); 2385 } 2386 } 2387 intr_flag.intr_po = INTR_PO_ACTIVE_HIGH; 2388 intr_flag.intr_el = INTR_EL_EDGE; 2389 intr_flag.bustype = BUS_ISA; 2390 return (apix_intx_setup(dip, inum, irqno, NULL, ispec, &intr_flag)); 2391 } 2392 2393 2394 /* 2395 * Setup IRQ table for pci devices. Return IRQ no or -1 on error 2396 */ 2397 static int 2398 apix_intx_setup_pci(dev_info_t *dip, int inum, int bustype, 2399 struct intrspec *ispec) 2400 { 2401 int busid, devid, pci_irq; 2402 ddi_acc_handle_t cfg_handle; 2403 uchar_t ipin; 2404 iflag_t intr_flag; 2405 struct apic_io_intr *intrp; 2406 2407 if (acpica_get_bdf(dip, &busid, &devid, NULL) != 0) 2408 return (-1); 2409 2410 if (busid == 0 && apic_pci_bus_total == 1) 2411 busid = (int)apic_single_pci_busid; 2412 2413 if (pci_config_setup(dip, &cfg_handle) != DDI_SUCCESS) 2414 return (-1); 2415 ipin = pci_config_get8(cfg_handle, PCI_CONF_IPIN) - PCI_INTA; 2416 pci_config_teardown(&cfg_handle); 2417 2418 if (apic_enable_acpi && !apic_use_acpi_madt_only) { /* ACPI */ 2419 if (apic_acpi_translate_pci_irq(dip, busid, devid, 2420 ipin, &pci_irq, &intr_flag) != ACPI_PSM_SUCCESS) 2421 return (-1); 2422 2423 intr_flag.bustype = (uchar_t)bustype; 2424 return (apix_intx_setup(dip, inum, pci_irq, NULL, ispec, 2425 &intr_flag)); 2426 } 2427 2428 /* MP configuration table */ 2429 pci_irq = ((devid & 0x1f) << 2) | (ipin & 0x3); 2430 if ((intrp = apic_find_io_intr_w_busid(pci_irq, busid)) == NULL) { 2431 pci_irq = apic_handle_pci_pci_bridge(dip, devid, ipin, &intrp); 2432 if (pci_irq == -1) 2433 return (-1); 2434 } 2435 2436 return (apix_intx_setup(dip, inum, pci_irq, intrp, ispec, NULL)); 2437 } 2438 2439 /* 2440 * Translate and return IRQ no 2441 */ 2442 static int 2443 apix_intx_xlate_irq(dev_info_t *dip, int inum, struct intrspec *ispec) 2444 { 2445 int newirq, irqno = ispec->intrspec_vec; 2446 int parent_is_pci_or_pciex = 0, child_is_pciex = 0; 2447 int bustype = 0, dev_len; 2448 char dev_type[16]; 2449 2450 if (apic_defconf) { 2451 mutex_enter(&airq_mutex); 2452 goto defconf; 2453 } 2454 2455 if ((dip == NULL) || (!apic_irq_translate && !apic_enable_acpi)) { 2456 mutex_enter(&airq_mutex); 2457 goto nonpci; 2458 } 2459 2460 /* 2461 * use ddi_getlongprop_buf() instead of ddi_prop_lookup_string() 2462 * to avoid extra buffer allocation. 2463 */ 2464 dev_len = sizeof (dev_type); 2465 if (ddi_getlongprop_buf(DDI_DEV_T_ANY, ddi_get_parent(dip), 2466 DDI_PROP_DONTPASS, "device_type", (caddr_t)dev_type, 2467 &dev_len) == DDI_PROP_SUCCESS) { 2468 if ((strcmp(dev_type, "pci") == 0) || 2469 (strcmp(dev_type, "pciex") == 0)) 2470 parent_is_pci_or_pciex = 1; 2471 } 2472 2473 if (ddi_getlongprop_buf(DDI_DEV_T_ANY, dip, 2474 DDI_PROP_DONTPASS, "compatible", (caddr_t)dev_type, 2475 &dev_len) == DDI_PROP_SUCCESS) { 2476 if (strstr(dev_type, "pciex")) 2477 child_is_pciex = 1; 2478 } 2479 2480 mutex_enter(&airq_mutex); 2481 2482 if (parent_is_pci_or_pciex) { 2483 bustype = child_is_pciex ? BUS_PCIE : BUS_PCI; 2484 newirq = apix_intx_setup_pci(dip, inum, bustype, ispec); 2485 if (newirq != -1) 2486 goto done; 2487 bustype = 0; 2488 } else if (strcmp(dev_type, "isa") == 0) 2489 bustype = BUS_ISA; 2490 else if (strcmp(dev_type, "eisa") == 0) 2491 bustype = BUS_EISA; 2492 2493 nonpci: 2494 newirq = apix_intx_setup_nonpci(dip, inum, bustype, ispec); 2495 if (newirq != -1) 2496 goto done; 2497 2498 defconf: 2499 newirq = apix_intx_setup(dip, inum, irqno, NULL, ispec, NULL); 2500 if (newirq == -1) { 2501 mutex_exit(&airq_mutex); 2502 return (-1); 2503 } 2504 done: 2505 ASSERT(apic_irq_table[newirq]); 2506 mutex_exit(&airq_mutex); 2507 return (newirq); 2508 } 2509 2510 static int 2511 apix_intx_alloc_vector(dev_info_t *dip, int inum, struct intrspec *ispec) 2512 { 2513 int irqno; 2514 apix_vector_t *vecp; 2515 2516 if ((irqno = apix_intx_xlate_irq(dip, inum, ispec)) == -1) 2517 return (0); 2518 2519 if ((vecp = apix_alloc_intx(dip, inum, irqno)) == NULL) 2520 return (0); 2521 2522 DDI_INTR_IMPLDBG((CE_CONT, "apix_intx_alloc_vector: dip=0x%p name=%s " 2523 "irqno=0x%x cpuid=%d vector=0x%x\n", 2524 (void *)dip, ddi_driver_name(dip), irqno, 2525 vecp->v_cpuid, vecp->v_vector)); 2526 2527 return (1); 2528 } 2529 2530 /* 2531 * Return the vector number if the translated IRQ for this device 2532 * has a vector mapping setup. If no IRQ setup exists or no vector is 2533 * allocated to it then return 0. 2534 */ 2535 static apix_vector_t * 2536 apix_intx_xlate_vector(dev_info_t *dip, int inum, struct intrspec *ispec) 2537 { 2538 int irqno; 2539 apix_vector_t *vecp; 2540 2541 /* get the IRQ number */ 2542 if ((irqno = apix_intx_xlate_irq(dip, inum, ispec)) == -1) 2543 return (NULL); 2544 2545 /* get the vector number if a vector is allocated to this irqno */ 2546 vecp = apix_intx_get_vector(irqno); 2547 2548 return (vecp); 2549 } 2550 2551 /* stub function */ 2552 int 2553 apix_loaded(void) 2554 { 2555 return (apix_is_enabled); 2556 } 2557