1 /*- 2 * Copyright (c) 2015-2016 Svatopluk Kraus 3 * Copyright (c) 2015-2016 Michal Meloun 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * New-style Interrupt Framework 33 * 34 * TODO: - add support for disconnected PICs. 35 * - to support IPI (PPI) enabling on other CPUs if already started. 36 * - to complete things for removable PICs. 37 */ 38 39 #include "opt_ddb.h" 40 #include "opt_hwpmc_hooks.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/syslog.h> 46 #include <sys/malloc.h> 47 #include <sys/proc.h> 48 #include <sys/queue.h> 49 #include <sys/bus.h> 50 #include <sys/interrupt.h> 51 #include <sys/conf.h> 52 #include <sys/cpuset.h> 53 #include <sys/rman.h> 54 #include <sys/sched.h> 55 #include <sys/smp.h> 56 #include <sys/vmmeter.h> 57 #ifdef HWPMC_HOOKS 58 #include <sys/pmckern.h> 59 #endif 60 61 #include <machine/atomic.h> 62 #include <machine/intr.h> 63 #include <machine/cpu.h> 64 #include <machine/smp.h> 65 #include <machine/stdarg.h> 66 67 #ifdef DDB 68 #include <ddb/ddb.h> 69 #endif 70 71 #include "pic_if.h" 72 #include "msi_if.h" 73 74 #define INTRNAME_LEN (2*MAXCOMLEN + 1) 75 76 #ifdef DEBUG 77 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 78 printf(fmt,##args); } while (0) 79 #else 80 #define debugf(fmt, args...) 81 #endif 82 83 MALLOC_DECLARE(M_INTRNG); 84 MALLOC_DEFINE(M_INTRNG, "intr", "intr interrupt handling"); 85 86 /* Main interrupt handler called from assembler -> 'hidden' for C code. */ 87 void intr_irq_handler(struct trapframe *tf); 88 89 /* Root interrupt controller stuff. */ 90 device_t intr_irq_root_dev; 91 static intr_irq_filter_t *irq_root_filter; 92 static void *irq_root_arg; 93 static u_int irq_root_ipicount; 94 95 struct intr_pic_child { 96 SLIST_ENTRY(intr_pic_child) pc_next; 97 struct intr_pic *pc_pic; 98 intr_child_irq_filter_t *pc_filter; 99 void *pc_filter_arg; 100 uintptr_t pc_start; 101 uintptr_t pc_length; 102 }; 103 104 /* Interrupt controller definition. */ 105 struct intr_pic { 106 SLIST_ENTRY(intr_pic) pic_next; 107 intptr_t pic_xref; /* hardware identification */ 108 device_t pic_dev; 109 /* Only one of FLAG_PIC or FLAG_MSI may be set */ 110 #define FLAG_PIC (1 << 0) 111 #define FLAG_MSI (1 << 1) 112 #define FLAG_TYPE_MASK (FLAG_PIC | FLAG_MSI) 113 u_int pic_flags; 114 struct mtx pic_child_lock; 115 SLIST_HEAD(, intr_pic_child) pic_children; 116 }; 117 118 static struct mtx pic_list_lock; 119 static SLIST_HEAD(, intr_pic) pic_list; 120 121 static struct intr_pic *pic_lookup(device_t dev, intptr_t xref, int flags); 122 123 /* Interrupt source definition. */ 124 static struct mtx isrc_table_lock; 125 static struct intr_irqsrc *irq_sources[NIRQ]; 126 u_int irq_next_free; 127 128 #ifdef SMP 129 static boolean_t irq_assign_cpu = FALSE; 130 #endif 131 132 /* 133 * - 2 counters for each I/O interrupt. 134 * - MAXCPU counters for each IPI counters for SMP. 135 */ 136 #ifdef SMP 137 #define INTRCNT_COUNT (NIRQ * 2 + INTR_IPI_COUNT * MAXCPU) 138 #else 139 #define INTRCNT_COUNT (NIRQ * 2) 140 #endif 141 142 /* Data for MI statistics reporting. */ 143 u_long intrcnt[INTRCNT_COUNT]; 144 char intrnames[INTRCNT_COUNT * INTRNAME_LEN]; 145 size_t sintrcnt = sizeof(intrcnt); 146 size_t sintrnames = sizeof(intrnames); 147 static u_int intrcnt_index; 148 149 static struct intr_irqsrc *intr_map_get_isrc(u_int res_id); 150 static void intr_map_set_isrc(u_int res_id, struct intr_irqsrc *isrc); 151 static struct intr_map_data * intr_map_get_map_data(u_int res_id); 152 static void intr_map_copy_map_data(u_int res_id, device_t *dev, intptr_t *xref, 153 struct intr_map_data **data); 154 155 /* 156 * Interrupt framework initialization routine. 157 */ 158 static void 159 intr_irq_init(void *dummy __unused) 160 { 161 162 SLIST_INIT(&pic_list); 163 mtx_init(&pic_list_lock, "intr pic list", NULL, MTX_DEF); 164 165 mtx_init(&isrc_table_lock, "intr isrc table", NULL, MTX_DEF); 166 } 167 SYSINIT(intr_irq_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_irq_init, NULL); 168 169 static void 170 intrcnt_setname(const char *name, int index) 171 { 172 173 snprintf(intrnames + INTRNAME_LEN * index, INTRNAME_LEN, "%-*s", 174 INTRNAME_LEN - 1, name); 175 } 176 177 /* 178 * Update name for interrupt source with interrupt event. 179 */ 180 static void 181 intrcnt_updatename(struct intr_irqsrc *isrc) 182 { 183 184 /* QQQ: What about stray counter name? */ 185 mtx_assert(&isrc_table_lock, MA_OWNED); 186 intrcnt_setname(isrc->isrc_event->ie_fullname, isrc->isrc_index); 187 } 188 189 /* 190 * Virtualization for interrupt source interrupt counter increment. 191 */ 192 static inline void 193 isrc_increment_count(struct intr_irqsrc *isrc) 194 { 195 196 if (isrc->isrc_flags & INTR_ISRCF_PPI) 197 atomic_add_long(&isrc->isrc_count[0], 1); 198 else 199 isrc->isrc_count[0]++; 200 } 201 202 /* 203 * Virtualization for interrupt source interrupt stray counter increment. 204 */ 205 static inline void 206 isrc_increment_straycount(struct intr_irqsrc *isrc) 207 { 208 209 isrc->isrc_count[1]++; 210 } 211 212 /* 213 * Virtualization for interrupt source interrupt name update. 214 */ 215 static void 216 isrc_update_name(struct intr_irqsrc *isrc, const char *name) 217 { 218 char str[INTRNAME_LEN]; 219 220 mtx_assert(&isrc_table_lock, MA_OWNED); 221 222 if (name != NULL) { 223 snprintf(str, INTRNAME_LEN, "%s: %s", isrc->isrc_name, name); 224 intrcnt_setname(str, isrc->isrc_index); 225 snprintf(str, INTRNAME_LEN, "stray %s: %s", isrc->isrc_name, 226 name); 227 intrcnt_setname(str, isrc->isrc_index + 1); 228 } else { 229 snprintf(str, INTRNAME_LEN, "%s:", isrc->isrc_name); 230 intrcnt_setname(str, isrc->isrc_index); 231 snprintf(str, INTRNAME_LEN, "stray %s:", isrc->isrc_name); 232 intrcnt_setname(str, isrc->isrc_index + 1); 233 } 234 } 235 236 /* 237 * Virtualization for interrupt source interrupt counters setup. 238 */ 239 static void 240 isrc_setup_counters(struct intr_irqsrc *isrc) 241 { 242 u_int index; 243 244 /* 245 * XXX - it does not work well with removable controllers and 246 * interrupt sources !!! 247 */ 248 index = atomic_fetchadd_int(&intrcnt_index, 2); 249 isrc->isrc_index = index; 250 isrc->isrc_count = &intrcnt[index]; 251 isrc_update_name(isrc, NULL); 252 } 253 254 /* 255 * Virtualization for interrupt source interrupt counters release. 256 */ 257 static void 258 isrc_release_counters(struct intr_irqsrc *isrc) 259 { 260 261 panic("%s: not implemented", __func__); 262 } 263 264 #ifdef SMP 265 /* 266 * Virtualization for interrupt source IPI counters setup. 267 */ 268 u_long * 269 intr_ipi_setup_counters(const char *name) 270 { 271 u_int index, i; 272 char str[INTRNAME_LEN]; 273 274 index = atomic_fetchadd_int(&intrcnt_index, MAXCPU); 275 for (i = 0; i < MAXCPU; i++) { 276 snprintf(str, INTRNAME_LEN, "cpu%d:%s", i, name); 277 intrcnt_setname(str, index + i); 278 } 279 return (&intrcnt[index]); 280 } 281 #endif 282 283 /* 284 * Main interrupt dispatch handler. It's called straight 285 * from the assembler, where CPU interrupt is served. 286 */ 287 void 288 intr_irq_handler(struct trapframe *tf) 289 { 290 struct trapframe * oldframe; 291 struct thread * td; 292 293 KASSERT(irq_root_filter != NULL, ("%s: no filter", __func__)); 294 295 VM_CNT_INC(v_intr); 296 critical_enter(); 297 td = curthread; 298 oldframe = td->td_intr_frame; 299 td->td_intr_frame = tf; 300 irq_root_filter(irq_root_arg); 301 td->td_intr_frame = oldframe; 302 critical_exit(); 303 #ifdef HWPMC_HOOKS 304 if (pmc_hook && TRAPF_USERMODE(tf) && 305 (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 306 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, tf); 307 #endif 308 } 309 310 int 311 intr_child_irq_handler(struct intr_pic *parent, uintptr_t irq) 312 { 313 struct intr_pic_child *child; 314 bool found; 315 316 found = false; 317 mtx_lock_spin(&parent->pic_child_lock); 318 SLIST_FOREACH(child, &parent->pic_children, pc_next) { 319 if (child->pc_start <= irq && 320 irq < (child->pc_start + child->pc_length)) { 321 found = true; 322 break; 323 } 324 } 325 mtx_unlock_spin(&parent->pic_child_lock); 326 327 if (found) 328 return (child->pc_filter(child->pc_filter_arg, irq)); 329 330 return (FILTER_STRAY); 331 } 332 333 /* 334 * interrupt controller dispatch function for interrupts. It should 335 * be called straight from the interrupt controller, when associated interrupt 336 * source is learned. 337 */ 338 int 339 intr_isrc_dispatch(struct intr_irqsrc *isrc, struct trapframe *tf) 340 { 341 342 KASSERT(isrc != NULL, ("%s: no source", __func__)); 343 344 isrc_increment_count(isrc); 345 346 #ifdef INTR_SOLO 347 if (isrc->isrc_filter != NULL) { 348 int error; 349 error = isrc->isrc_filter(isrc->isrc_arg, tf); 350 PIC_POST_FILTER(isrc->isrc_dev, isrc); 351 if (error == FILTER_HANDLED) 352 return (0); 353 } else 354 #endif 355 if (isrc->isrc_event != NULL) { 356 if (intr_event_handle(isrc->isrc_event, tf) == 0) 357 return (0); 358 } 359 360 isrc_increment_straycount(isrc); 361 return (EINVAL); 362 } 363 364 /* 365 * Alloc unique interrupt number (resource handle) for interrupt source. 366 * 367 * There could be various strategies how to allocate free interrupt number 368 * (resource handle) for new interrupt source. 369 * 370 * 1. Handles are always allocated forward, so handles are not recycled 371 * immediately. However, if only one free handle left which is reused 372 * constantly... 373 */ 374 static inline int 375 isrc_alloc_irq(struct intr_irqsrc *isrc) 376 { 377 u_int maxirqs, irq; 378 379 mtx_assert(&isrc_table_lock, MA_OWNED); 380 381 maxirqs = nitems(irq_sources); 382 if (irq_next_free >= maxirqs) 383 return (ENOSPC); 384 385 for (irq = irq_next_free; irq < maxirqs; irq++) { 386 if (irq_sources[irq] == NULL) 387 goto found; 388 } 389 for (irq = 0; irq < irq_next_free; irq++) { 390 if (irq_sources[irq] == NULL) 391 goto found; 392 } 393 394 irq_next_free = maxirqs; 395 return (ENOSPC); 396 397 found: 398 isrc->isrc_irq = irq; 399 irq_sources[irq] = isrc; 400 401 irq_next_free = irq + 1; 402 if (irq_next_free >= maxirqs) 403 irq_next_free = 0; 404 return (0); 405 } 406 407 /* 408 * Free unique interrupt number (resource handle) from interrupt source. 409 */ 410 static inline int 411 isrc_free_irq(struct intr_irqsrc *isrc) 412 { 413 414 mtx_assert(&isrc_table_lock, MA_OWNED); 415 416 if (isrc->isrc_irq >= nitems(irq_sources)) 417 return (EINVAL); 418 if (irq_sources[isrc->isrc_irq] != isrc) 419 return (EINVAL); 420 421 irq_sources[isrc->isrc_irq] = NULL; 422 isrc->isrc_irq = INTR_IRQ_INVALID; /* just to be safe */ 423 return (0); 424 } 425 426 /* 427 * Initialize interrupt source and register it into global interrupt table. 428 */ 429 int 430 intr_isrc_register(struct intr_irqsrc *isrc, device_t dev, u_int flags, 431 const char *fmt, ...) 432 { 433 int error; 434 va_list ap; 435 436 bzero(isrc, sizeof(struct intr_irqsrc)); 437 isrc->isrc_dev = dev; 438 isrc->isrc_irq = INTR_IRQ_INVALID; /* just to be safe */ 439 isrc->isrc_flags = flags; 440 441 va_start(ap, fmt); 442 vsnprintf(isrc->isrc_name, INTR_ISRC_NAMELEN, fmt, ap); 443 va_end(ap); 444 445 mtx_lock(&isrc_table_lock); 446 error = isrc_alloc_irq(isrc); 447 if (error != 0) { 448 mtx_unlock(&isrc_table_lock); 449 return (error); 450 } 451 /* 452 * Setup interrupt counters, but not for IPI sources. Those are setup 453 * later and only for used ones (up to INTR_IPI_COUNT) to not exhaust 454 * our counter pool. 455 */ 456 if ((isrc->isrc_flags & INTR_ISRCF_IPI) == 0) 457 isrc_setup_counters(isrc); 458 mtx_unlock(&isrc_table_lock); 459 return (0); 460 } 461 462 /* 463 * Deregister interrupt source from global interrupt table. 464 */ 465 int 466 intr_isrc_deregister(struct intr_irqsrc *isrc) 467 { 468 int error; 469 470 mtx_lock(&isrc_table_lock); 471 if ((isrc->isrc_flags & INTR_ISRCF_IPI) == 0) 472 isrc_release_counters(isrc); 473 error = isrc_free_irq(isrc); 474 mtx_unlock(&isrc_table_lock); 475 return (error); 476 } 477 478 #ifdef SMP 479 /* 480 * A support function for a PIC to decide if provided ISRC should be inited 481 * on given cpu. The logic of INTR_ISRCF_BOUND flag and isrc_cpu member of 482 * struct intr_irqsrc is the following: 483 * 484 * If INTR_ISRCF_BOUND is set, the ISRC should be inited only on cpus 485 * set in isrc_cpu. If not, the ISRC should be inited on every cpu and 486 * isrc_cpu is kept consistent with it. Thus isrc_cpu is always correct. 487 */ 488 bool 489 intr_isrc_init_on_cpu(struct intr_irqsrc *isrc, u_int cpu) 490 { 491 492 if (isrc->isrc_handlers == 0) 493 return (false); 494 if ((isrc->isrc_flags & (INTR_ISRCF_PPI | INTR_ISRCF_IPI)) == 0) 495 return (false); 496 if (isrc->isrc_flags & INTR_ISRCF_BOUND) 497 return (CPU_ISSET(cpu, &isrc->isrc_cpu)); 498 499 CPU_SET(cpu, &isrc->isrc_cpu); 500 return (true); 501 } 502 #endif 503 504 #ifdef INTR_SOLO 505 /* 506 * Setup filter into interrupt source. 507 */ 508 static int 509 iscr_setup_filter(struct intr_irqsrc *isrc, const char *name, 510 intr_irq_filter_t *filter, void *arg, void **cookiep) 511 { 512 513 if (filter == NULL) 514 return (EINVAL); 515 516 mtx_lock(&isrc_table_lock); 517 /* 518 * Make sure that we do not mix the two ways 519 * how we handle interrupt sources. 520 */ 521 if (isrc->isrc_filter != NULL || isrc->isrc_event != NULL) { 522 mtx_unlock(&isrc_table_lock); 523 return (EBUSY); 524 } 525 isrc->isrc_filter = filter; 526 isrc->isrc_arg = arg; 527 isrc_update_name(isrc, name); 528 mtx_unlock(&isrc_table_lock); 529 530 *cookiep = isrc; 531 return (0); 532 } 533 #endif 534 535 /* 536 * Interrupt source pre_ithread method for MI interrupt framework. 537 */ 538 static void 539 intr_isrc_pre_ithread(void *arg) 540 { 541 struct intr_irqsrc *isrc = arg; 542 543 PIC_PRE_ITHREAD(isrc->isrc_dev, isrc); 544 } 545 546 /* 547 * Interrupt source post_ithread method for MI interrupt framework. 548 */ 549 static void 550 intr_isrc_post_ithread(void *arg) 551 { 552 struct intr_irqsrc *isrc = arg; 553 554 PIC_POST_ITHREAD(isrc->isrc_dev, isrc); 555 } 556 557 /* 558 * Interrupt source post_filter method for MI interrupt framework. 559 */ 560 static void 561 intr_isrc_post_filter(void *arg) 562 { 563 struct intr_irqsrc *isrc = arg; 564 565 PIC_POST_FILTER(isrc->isrc_dev, isrc); 566 } 567 568 /* 569 * Interrupt source assign_cpu method for MI interrupt framework. 570 */ 571 static int 572 intr_isrc_assign_cpu(void *arg, int cpu) 573 { 574 #ifdef SMP 575 struct intr_irqsrc *isrc = arg; 576 int error; 577 578 if (isrc->isrc_dev != intr_irq_root_dev) 579 return (EINVAL); 580 581 mtx_lock(&isrc_table_lock); 582 if (cpu == NOCPU) { 583 CPU_ZERO(&isrc->isrc_cpu); 584 isrc->isrc_flags &= ~INTR_ISRCF_BOUND; 585 } else { 586 CPU_SETOF(cpu, &isrc->isrc_cpu); 587 isrc->isrc_flags |= INTR_ISRCF_BOUND; 588 } 589 590 /* 591 * In NOCPU case, it's up to PIC to either leave ISRC on same CPU or 592 * re-balance it to another CPU or enable it on more CPUs. However, 593 * PIC is expected to change isrc_cpu appropriately to keep us well 594 * informed if the call is successful. 595 */ 596 if (irq_assign_cpu) { 597 error = PIC_BIND_INTR(isrc->isrc_dev, isrc); 598 if (error) { 599 CPU_ZERO(&isrc->isrc_cpu); 600 mtx_unlock(&isrc_table_lock); 601 return (error); 602 } 603 } 604 mtx_unlock(&isrc_table_lock); 605 return (0); 606 #else 607 return (EOPNOTSUPP); 608 #endif 609 } 610 611 /* 612 * Create interrupt event for interrupt source. 613 */ 614 static int 615 isrc_event_create(struct intr_irqsrc *isrc) 616 { 617 struct intr_event *ie; 618 int error; 619 620 error = intr_event_create(&ie, isrc, 0, isrc->isrc_irq, 621 intr_isrc_pre_ithread, intr_isrc_post_ithread, intr_isrc_post_filter, 622 intr_isrc_assign_cpu, "%s:", isrc->isrc_name); 623 if (error) 624 return (error); 625 626 mtx_lock(&isrc_table_lock); 627 /* 628 * Make sure that we do not mix the two ways 629 * how we handle interrupt sources. Let contested event wins. 630 */ 631 #ifdef INTR_SOLO 632 if (isrc->isrc_filter != NULL || isrc->isrc_event != NULL) { 633 #else 634 if (isrc->isrc_event != NULL) { 635 #endif 636 mtx_unlock(&isrc_table_lock); 637 intr_event_destroy(ie); 638 return (isrc->isrc_event != NULL ? EBUSY : 0); 639 } 640 isrc->isrc_event = ie; 641 mtx_unlock(&isrc_table_lock); 642 643 return (0); 644 } 645 #ifdef notyet 646 /* 647 * Destroy interrupt event for interrupt source. 648 */ 649 static void 650 isrc_event_destroy(struct intr_irqsrc *isrc) 651 { 652 struct intr_event *ie; 653 654 mtx_lock(&isrc_table_lock); 655 ie = isrc->isrc_event; 656 isrc->isrc_event = NULL; 657 mtx_unlock(&isrc_table_lock); 658 659 if (ie != NULL) 660 intr_event_destroy(ie); 661 } 662 #endif 663 /* 664 * Add handler to interrupt source. 665 */ 666 static int 667 isrc_add_handler(struct intr_irqsrc *isrc, const char *name, 668 driver_filter_t filter, driver_intr_t handler, void *arg, 669 enum intr_type flags, void **cookiep) 670 { 671 int error; 672 673 if (isrc->isrc_event == NULL) { 674 error = isrc_event_create(isrc); 675 if (error) 676 return (error); 677 } 678 679 error = intr_event_add_handler(isrc->isrc_event, name, filter, handler, 680 arg, intr_priority(flags), flags, cookiep); 681 if (error == 0) { 682 mtx_lock(&isrc_table_lock); 683 intrcnt_updatename(isrc); 684 mtx_unlock(&isrc_table_lock); 685 } 686 687 return (error); 688 } 689 690 /* 691 * Lookup interrupt controller locked. 692 */ 693 static inline struct intr_pic * 694 pic_lookup_locked(device_t dev, intptr_t xref, int flags) 695 { 696 struct intr_pic *pic; 697 698 mtx_assert(&pic_list_lock, MA_OWNED); 699 700 if (dev == NULL && xref == 0) 701 return (NULL); 702 703 /* Note that pic->pic_dev is never NULL on registered PIC. */ 704 SLIST_FOREACH(pic, &pic_list, pic_next) { 705 if ((pic->pic_flags & FLAG_TYPE_MASK) != 706 (flags & FLAG_TYPE_MASK)) 707 continue; 708 709 if (dev == NULL) { 710 if (xref == pic->pic_xref) 711 return (pic); 712 } else if (xref == 0 || pic->pic_xref == 0) { 713 if (dev == pic->pic_dev) 714 return (pic); 715 } else if (xref == pic->pic_xref && dev == pic->pic_dev) 716 return (pic); 717 } 718 return (NULL); 719 } 720 721 /* 722 * Lookup interrupt controller. 723 */ 724 static struct intr_pic * 725 pic_lookup(device_t dev, intptr_t xref, int flags) 726 { 727 struct intr_pic *pic; 728 729 mtx_lock(&pic_list_lock); 730 pic = pic_lookup_locked(dev, xref, flags); 731 mtx_unlock(&pic_list_lock); 732 return (pic); 733 } 734 735 /* 736 * Create interrupt controller. 737 */ 738 static struct intr_pic * 739 pic_create(device_t dev, intptr_t xref, int flags) 740 { 741 struct intr_pic *pic; 742 743 mtx_lock(&pic_list_lock); 744 pic = pic_lookup_locked(dev, xref, flags); 745 if (pic != NULL) { 746 mtx_unlock(&pic_list_lock); 747 return (pic); 748 } 749 pic = malloc(sizeof(*pic), M_INTRNG, M_NOWAIT | M_ZERO); 750 if (pic == NULL) { 751 mtx_unlock(&pic_list_lock); 752 return (NULL); 753 } 754 pic->pic_xref = xref; 755 pic->pic_dev = dev; 756 pic->pic_flags = flags; 757 mtx_init(&pic->pic_child_lock, "pic child lock", NULL, MTX_SPIN); 758 SLIST_INSERT_HEAD(&pic_list, pic, pic_next); 759 mtx_unlock(&pic_list_lock); 760 761 return (pic); 762 } 763 #ifdef notyet 764 /* 765 * Destroy interrupt controller. 766 */ 767 static void 768 pic_destroy(device_t dev, intptr_t xref, int flags) 769 { 770 struct intr_pic *pic; 771 772 mtx_lock(&pic_list_lock); 773 pic = pic_lookup_locked(dev, xref, flags); 774 if (pic == NULL) { 775 mtx_unlock(&pic_list_lock); 776 return; 777 } 778 SLIST_REMOVE(&pic_list, pic, intr_pic, pic_next); 779 mtx_unlock(&pic_list_lock); 780 781 free(pic, M_INTRNG); 782 } 783 #endif 784 /* 785 * Register interrupt controller. 786 */ 787 struct intr_pic * 788 intr_pic_register(device_t dev, intptr_t xref) 789 { 790 struct intr_pic *pic; 791 792 if (dev == NULL) 793 return (NULL); 794 pic = pic_create(dev, xref, FLAG_PIC); 795 if (pic == NULL) 796 return (NULL); 797 798 debugf("PIC %p registered for %s <dev %p, xref %x>\n", pic, 799 device_get_nameunit(dev), dev, xref); 800 return (pic); 801 } 802 803 /* 804 * Unregister interrupt controller. 805 */ 806 int 807 intr_pic_deregister(device_t dev, intptr_t xref) 808 { 809 810 panic("%s: not implemented", __func__); 811 } 812 813 /* 814 * Mark interrupt controller (itself) as a root one. 815 * 816 * Note that only an interrupt controller can really know its position 817 * in interrupt controller's tree. So root PIC must claim itself as a root. 818 * 819 * In FDT case, according to ePAPR approved version 1.1 from 08 April 2011, 820 * page 30: 821 * "The root of the interrupt tree is determined when traversal 822 * of the interrupt tree reaches an interrupt controller node without 823 * an interrupts property and thus no explicit interrupt parent." 824 */ 825 int 826 intr_pic_claim_root(device_t dev, intptr_t xref, intr_irq_filter_t *filter, 827 void *arg, u_int ipicount) 828 { 829 struct intr_pic *pic; 830 831 pic = pic_lookup(dev, xref, FLAG_PIC); 832 if (pic == NULL) { 833 device_printf(dev, "not registered\n"); 834 return (EINVAL); 835 } 836 837 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_PIC, 838 ("%s: Found a non-PIC controller: %s", __func__, 839 device_get_name(pic->pic_dev))); 840 841 if (filter == NULL) { 842 device_printf(dev, "filter missing\n"); 843 return (EINVAL); 844 } 845 846 /* 847 * Only one interrupt controllers could be on the root for now. 848 * Note that we further suppose that there is not threaded interrupt 849 * routine (handler) on the root. See intr_irq_handler(). 850 */ 851 if (intr_irq_root_dev != NULL) { 852 device_printf(dev, "another root already set\n"); 853 return (EBUSY); 854 } 855 856 intr_irq_root_dev = dev; 857 irq_root_filter = filter; 858 irq_root_arg = arg; 859 irq_root_ipicount = ipicount; 860 861 debugf("irq root set to %s\n", device_get_nameunit(dev)); 862 return (0); 863 } 864 865 /* 866 * Add a handler to manage a sub range of a parents interrupts. 867 */ 868 struct intr_pic * 869 intr_pic_add_handler(device_t parent, struct intr_pic *pic, 870 intr_child_irq_filter_t *filter, void *arg, uintptr_t start, 871 uintptr_t length) 872 { 873 struct intr_pic *parent_pic; 874 struct intr_pic_child *newchild; 875 #ifdef INVARIANTS 876 struct intr_pic_child *child; 877 #endif 878 879 /* Find the parent PIC */ 880 parent_pic = pic_lookup(parent, 0, FLAG_PIC); 881 if (parent_pic == NULL) 882 return (NULL); 883 884 newchild = malloc(sizeof(*newchild), M_INTRNG, M_WAITOK | M_ZERO); 885 newchild->pc_pic = pic; 886 newchild->pc_filter = filter; 887 newchild->pc_filter_arg = arg; 888 newchild->pc_start = start; 889 newchild->pc_length = length; 890 891 mtx_lock_spin(&parent_pic->pic_child_lock); 892 #ifdef INVARIANTS 893 SLIST_FOREACH(child, &parent_pic->pic_children, pc_next) { 894 KASSERT(child->pc_pic != pic, ("%s: Adding a child PIC twice", 895 __func__)); 896 } 897 #endif 898 SLIST_INSERT_HEAD(&parent_pic->pic_children, newchild, pc_next); 899 mtx_unlock_spin(&parent_pic->pic_child_lock); 900 901 return (pic); 902 } 903 904 static int 905 intr_resolve_irq(device_t dev, intptr_t xref, struct intr_map_data *data, 906 struct intr_irqsrc **isrc) 907 { 908 struct intr_pic *pic; 909 struct intr_map_data_msi *msi; 910 911 if (data == NULL) 912 return (EINVAL); 913 914 pic = pic_lookup(dev, xref, 915 (data->type == INTR_MAP_DATA_MSI) ? FLAG_MSI : FLAG_PIC); 916 if (pic == NULL) 917 return (ESRCH); 918 919 switch (data->type) { 920 case INTR_MAP_DATA_MSI: 921 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 922 ("%s: Found a non-MSI controller: %s", __func__, 923 device_get_name(pic->pic_dev))); 924 msi = (struct intr_map_data_msi *)data; 925 *isrc = msi->isrc; 926 return (0); 927 928 default: 929 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_PIC, 930 ("%s: Found a non-PIC controller: %s", __func__, 931 device_get_name(pic->pic_dev))); 932 return (PIC_MAP_INTR(pic->pic_dev, data, isrc)); 933 934 } 935 } 936 937 int 938 intr_activate_irq(device_t dev, struct resource *res) 939 { 940 device_t map_dev; 941 intptr_t map_xref; 942 struct intr_map_data *data; 943 struct intr_irqsrc *isrc; 944 u_int res_id; 945 int error; 946 947 KASSERT(rman_get_start(res) == rman_get_end(res), 948 ("%s: more interrupts in resource", __func__)); 949 950 res_id = (u_int)rman_get_start(res); 951 if (intr_map_get_isrc(res_id) != NULL) 952 panic("Attempt to double activation of resource id: %u\n", 953 res_id); 954 intr_map_copy_map_data(res_id, &map_dev, &map_xref, &data); 955 error = intr_resolve_irq(map_dev, map_xref, data, &isrc); 956 if (error != 0) { 957 free(data, M_INTRNG); 958 /* XXX TODO DISCONECTED PICs */ 959 /* if (error == EINVAL) return(0); */ 960 return (error); 961 } 962 intr_map_set_isrc(res_id, isrc); 963 rman_set_virtual(res, data); 964 return (PIC_ACTIVATE_INTR(isrc->isrc_dev, isrc, res, data)); 965 } 966 967 int 968 intr_deactivate_irq(device_t dev, struct resource *res) 969 { 970 struct intr_map_data *data; 971 struct intr_irqsrc *isrc; 972 u_int res_id; 973 int error; 974 975 KASSERT(rman_get_start(res) == rman_get_end(res), 976 ("%s: more interrupts in resource", __func__)); 977 978 res_id = (u_int)rman_get_start(res); 979 isrc = intr_map_get_isrc(res_id); 980 if (isrc == NULL) 981 panic("Attempt to deactivate non-active resource id: %u\n", 982 res_id); 983 984 data = rman_get_virtual(res); 985 error = PIC_DEACTIVATE_INTR(isrc->isrc_dev, isrc, res, data); 986 intr_map_set_isrc(res_id, NULL); 987 rman_set_virtual(res, NULL); 988 free(data, M_INTRNG); 989 return (error); 990 } 991 992 int 993 intr_setup_irq(device_t dev, struct resource *res, driver_filter_t filt, 994 driver_intr_t hand, void *arg, int flags, void **cookiep) 995 { 996 int error; 997 struct intr_map_data *data; 998 struct intr_irqsrc *isrc; 999 const char *name; 1000 u_int res_id; 1001 1002 KASSERT(rman_get_start(res) == rman_get_end(res), 1003 ("%s: more interrupts in resource", __func__)); 1004 1005 res_id = (u_int)rman_get_start(res); 1006 isrc = intr_map_get_isrc(res_id); 1007 if (isrc == NULL) { 1008 /* XXX TODO DISCONECTED PICs */ 1009 return (EINVAL); 1010 } 1011 1012 data = rman_get_virtual(res); 1013 name = device_get_nameunit(dev); 1014 1015 #ifdef INTR_SOLO 1016 /* 1017 * Standard handling is done through MI interrupt framework. However, 1018 * some interrupts could request solely own special handling. This 1019 * non standard handling can be used for interrupt controllers without 1020 * handler (filter only), so in case that interrupt controllers are 1021 * chained, MI interrupt framework is called only in leaf controller. 1022 * 1023 * Note that root interrupt controller routine is served as well, 1024 * however in intr_irq_handler(), i.e. main system dispatch routine. 1025 */ 1026 if (flags & INTR_SOLO && hand != NULL) { 1027 debugf("irq %u cannot solo on %s\n", irq, name); 1028 return (EINVAL); 1029 } 1030 1031 if (flags & INTR_SOLO) { 1032 error = iscr_setup_filter(isrc, name, (intr_irq_filter_t *)filt, 1033 arg, cookiep); 1034 debugf("irq %u setup filter error %d on %s\n", irq, error, 1035 name); 1036 } else 1037 #endif 1038 { 1039 error = isrc_add_handler(isrc, name, filt, hand, arg, flags, 1040 cookiep); 1041 debugf("irq %u add handler error %d on %s\n", irq, error, name); 1042 } 1043 if (error != 0) 1044 return (error); 1045 1046 mtx_lock(&isrc_table_lock); 1047 error = PIC_SETUP_INTR(isrc->isrc_dev, isrc, res, data); 1048 if (error == 0) { 1049 isrc->isrc_handlers++; 1050 if (isrc->isrc_handlers == 1) 1051 PIC_ENABLE_INTR(isrc->isrc_dev, isrc); 1052 } 1053 mtx_unlock(&isrc_table_lock); 1054 if (error != 0) 1055 intr_event_remove_handler(*cookiep); 1056 return (error); 1057 } 1058 1059 int 1060 intr_teardown_irq(device_t dev, struct resource *res, void *cookie) 1061 { 1062 int error; 1063 struct intr_map_data *data; 1064 struct intr_irqsrc *isrc; 1065 u_int res_id; 1066 1067 KASSERT(rman_get_start(res) == rman_get_end(res), 1068 ("%s: more interrupts in resource", __func__)); 1069 1070 res_id = (u_int)rman_get_start(res); 1071 isrc = intr_map_get_isrc(res_id); 1072 if (isrc == NULL || isrc->isrc_handlers == 0) 1073 return (EINVAL); 1074 1075 data = rman_get_virtual(res); 1076 1077 #ifdef INTR_SOLO 1078 if (isrc->isrc_filter != NULL) { 1079 if (isrc != cookie) 1080 return (EINVAL); 1081 1082 mtx_lock(&isrc_table_lock); 1083 isrc->isrc_filter = NULL; 1084 isrc->isrc_arg = NULL; 1085 isrc->isrc_handlers = 0; 1086 PIC_DISABLE_INTR(isrc->isrc_dev, isrc); 1087 PIC_TEARDOWN_INTR(isrc->isrc_dev, isrc, res, data); 1088 isrc_update_name(isrc, NULL); 1089 mtx_unlock(&isrc_table_lock); 1090 return (0); 1091 } 1092 #endif 1093 if (isrc != intr_handler_source(cookie)) 1094 return (EINVAL); 1095 1096 error = intr_event_remove_handler(cookie); 1097 if (error == 0) { 1098 mtx_lock(&isrc_table_lock); 1099 isrc->isrc_handlers--; 1100 if (isrc->isrc_handlers == 0) 1101 PIC_DISABLE_INTR(isrc->isrc_dev, isrc); 1102 PIC_TEARDOWN_INTR(isrc->isrc_dev, isrc, res, data); 1103 intrcnt_updatename(isrc); 1104 mtx_unlock(&isrc_table_lock); 1105 } 1106 return (error); 1107 } 1108 1109 int 1110 intr_describe_irq(device_t dev, struct resource *res, void *cookie, 1111 const char *descr) 1112 { 1113 int error; 1114 struct intr_irqsrc *isrc; 1115 u_int res_id; 1116 1117 KASSERT(rman_get_start(res) == rman_get_end(res), 1118 ("%s: more interrupts in resource", __func__)); 1119 1120 res_id = (u_int)rman_get_start(res); 1121 isrc = intr_map_get_isrc(res_id); 1122 if (isrc == NULL || isrc->isrc_handlers == 0) 1123 return (EINVAL); 1124 #ifdef INTR_SOLO 1125 if (isrc->isrc_filter != NULL) { 1126 if (isrc != cookie) 1127 return (EINVAL); 1128 1129 mtx_lock(&isrc_table_lock); 1130 isrc_update_name(isrc, descr); 1131 mtx_unlock(&isrc_table_lock); 1132 return (0); 1133 } 1134 #endif 1135 error = intr_event_describe_handler(isrc->isrc_event, cookie, descr); 1136 if (error == 0) { 1137 mtx_lock(&isrc_table_lock); 1138 intrcnt_updatename(isrc); 1139 mtx_unlock(&isrc_table_lock); 1140 } 1141 return (error); 1142 } 1143 1144 #ifdef SMP 1145 int 1146 intr_bind_irq(device_t dev, struct resource *res, int cpu) 1147 { 1148 struct intr_irqsrc *isrc; 1149 u_int res_id; 1150 1151 KASSERT(rman_get_start(res) == rman_get_end(res), 1152 ("%s: more interrupts in resource", __func__)); 1153 1154 res_id = (u_int)rman_get_start(res); 1155 isrc = intr_map_get_isrc(res_id); 1156 if (isrc == NULL || isrc->isrc_handlers == 0) 1157 return (EINVAL); 1158 #ifdef INTR_SOLO 1159 if (isrc->isrc_filter != NULL) 1160 return (intr_isrc_assign_cpu(isrc, cpu)); 1161 #endif 1162 return (intr_event_bind(isrc->isrc_event, cpu)); 1163 } 1164 1165 /* 1166 * Return the CPU that the next interrupt source should use. 1167 * For now just returns the next CPU according to round-robin. 1168 */ 1169 u_int 1170 intr_irq_next_cpu(u_int last_cpu, cpuset_t *cpumask) 1171 { 1172 1173 if (!irq_assign_cpu || mp_ncpus == 1) 1174 return (PCPU_GET(cpuid)); 1175 1176 do { 1177 last_cpu++; 1178 if (last_cpu > mp_maxid) 1179 last_cpu = 0; 1180 } while (!CPU_ISSET(last_cpu, cpumask)); 1181 return (last_cpu); 1182 } 1183 1184 /* 1185 * Distribute all the interrupt sources among the available 1186 * CPUs once the AP's have been launched. 1187 */ 1188 static void 1189 intr_irq_shuffle(void *arg __unused) 1190 { 1191 struct intr_irqsrc *isrc; 1192 u_int i; 1193 1194 if (mp_ncpus == 1) 1195 return; 1196 1197 mtx_lock(&isrc_table_lock); 1198 irq_assign_cpu = TRUE; 1199 for (i = 0; i < NIRQ; i++) { 1200 isrc = irq_sources[i]; 1201 if (isrc == NULL || isrc->isrc_handlers == 0 || 1202 isrc->isrc_flags & (INTR_ISRCF_PPI | INTR_ISRCF_IPI)) 1203 continue; 1204 1205 if (isrc->isrc_event != NULL && 1206 isrc->isrc_flags & INTR_ISRCF_BOUND && 1207 isrc->isrc_event->ie_cpu != CPU_FFS(&isrc->isrc_cpu) - 1) 1208 panic("%s: CPU inconsistency", __func__); 1209 1210 if ((isrc->isrc_flags & INTR_ISRCF_BOUND) == 0) 1211 CPU_ZERO(&isrc->isrc_cpu); /* start again */ 1212 1213 /* 1214 * We are in wicked position here if the following call fails 1215 * for bound ISRC. The best thing we can do is to clear 1216 * isrc_cpu so inconsistency with ie_cpu will be detectable. 1217 */ 1218 if (PIC_BIND_INTR(isrc->isrc_dev, isrc) != 0) 1219 CPU_ZERO(&isrc->isrc_cpu); 1220 } 1221 mtx_unlock(&isrc_table_lock); 1222 } 1223 SYSINIT(intr_irq_shuffle, SI_SUB_SMP, SI_ORDER_SECOND, intr_irq_shuffle, NULL); 1224 1225 #else 1226 u_int 1227 intr_irq_next_cpu(u_int current_cpu, cpuset_t *cpumask) 1228 { 1229 1230 return (PCPU_GET(cpuid)); 1231 } 1232 #endif 1233 1234 /* 1235 * Allocate memory for new intr_map_data structure. 1236 * Initialize common fields. 1237 */ 1238 struct intr_map_data * 1239 intr_alloc_map_data(enum intr_map_data_type type, size_t len, int flags) 1240 { 1241 struct intr_map_data *data; 1242 1243 data = malloc(len, M_INTRNG, flags); 1244 data->type = type; 1245 data->len = len; 1246 return (data); 1247 } 1248 1249 void intr_free_intr_map_data(struct intr_map_data *data) 1250 { 1251 1252 free(data, M_INTRNG); 1253 } 1254 1255 1256 /* 1257 * Register a MSI/MSI-X interrupt controller 1258 */ 1259 int 1260 intr_msi_register(device_t dev, intptr_t xref) 1261 { 1262 struct intr_pic *pic; 1263 1264 if (dev == NULL) 1265 return (EINVAL); 1266 pic = pic_create(dev, xref, FLAG_MSI); 1267 if (pic == NULL) 1268 return (ENOMEM); 1269 1270 debugf("PIC %p registered for %s <dev %p, xref %jx>\n", pic, 1271 device_get_nameunit(dev), dev, (uintmax_t)xref); 1272 return (0); 1273 } 1274 1275 int 1276 intr_alloc_msi(device_t pci, device_t child, intptr_t xref, int count, 1277 int maxcount, int *irqs) 1278 { 1279 struct intr_irqsrc **isrc; 1280 struct intr_pic *pic; 1281 device_t pdev; 1282 struct intr_map_data_msi *msi; 1283 int err, i; 1284 1285 pic = pic_lookup(NULL, xref, FLAG_MSI); 1286 if (pic == NULL) 1287 return (ESRCH); 1288 1289 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 1290 ("%s: Found a non-MSI controller: %s", __func__, 1291 device_get_name(pic->pic_dev))); 1292 1293 isrc = malloc(sizeof(*isrc) * count, M_INTRNG, M_WAITOK); 1294 err = MSI_ALLOC_MSI(pic->pic_dev, child, count, maxcount, &pdev, isrc); 1295 if (err != 0) { 1296 free(isrc, M_INTRNG); 1297 return (err); 1298 } 1299 1300 for (i = 0; i < count; i++) { 1301 msi = (struct intr_map_data_msi *)intr_alloc_map_data( 1302 INTR_MAP_DATA_MSI, sizeof(*msi), M_WAITOK | M_ZERO); 1303 msi-> isrc = isrc[i]; 1304 irqs[i] = intr_map_irq(pic->pic_dev, xref, 1305 (struct intr_map_data *)msi); 1306 1307 } 1308 free(isrc, M_INTRNG); 1309 1310 return (err); 1311 } 1312 1313 int 1314 intr_release_msi(device_t pci, device_t child, intptr_t xref, int count, 1315 int *irqs) 1316 { 1317 struct intr_irqsrc **isrc; 1318 struct intr_pic *pic; 1319 struct intr_map_data_msi *msi; 1320 int i, err; 1321 1322 pic = pic_lookup(NULL, xref, FLAG_MSI); 1323 if (pic == NULL) 1324 return (ESRCH); 1325 1326 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 1327 ("%s: Found a non-MSI controller: %s", __func__, 1328 device_get_name(pic->pic_dev))); 1329 1330 isrc = malloc(sizeof(*isrc) * count, M_INTRNG, M_WAITOK); 1331 1332 for (i = 0; i < count; i++) { 1333 msi = (struct intr_map_data_msi *) 1334 intr_map_get_map_data(irqs[i]); 1335 KASSERT(msi->hdr.type == INTR_MAP_DATA_MSI, 1336 ("%s: irq %d map data is not MSI", __func__, 1337 irqs[i])); 1338 isrc[i] = msi->isrc; 1339 } 1340 1341 err = MSI_RELEASE_MSI(pic->pic_dev, child, count, isrc); 1342 1343 for (i = 0; i < count; i++) { 1344 if (isrc[i] != NULL) 1345 intr_unmap_irq(irqs[i]); 1346 } 1347 1348 free(isrc, M_INTRNG); 1349 return (err); 1350 } 1351 1352 int 1353 intr_alloc_msix(device_t pci, device_t child, intptr_t xref, int *irq) 1354 { 1355 struct intr_irqsrc *isrc; 1356 struct intr_pic *pic; 1357 device_t pdev; 1358 struct intr_map_data_msi *msi; 1359 int err; 1360 1361 pic = pic_lookup(NULL, xref, FLAG_MSI); 1362 if (pic == NULL) 1363 return (ESRCH); 1364 1365 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 1366 ("%s: Found a non-MSI controller: %s", __func__, 1367 device_get_name(pic->pic_dev))); 1368 1369 1370 err = MSI_ALLOC_MSIX(pic->pic_dev, child, &pdev, &isrc); 1371 if (err != 0) 1372 return (err); 1373 1374 msi = (struct intr_map_data_msi *)intr_alloc_map_data( 1375 INTR_MAP_DATA_MSI, sizeof(*msi), M_WAITOK | M_ZERO); 1376 msi->isrc = isrc; 1377 *irq = intr_map_irq(pic->pic_dev, xref, (struct intr_map_data *)msi); 1378 return (0); 1379 } 1380 1381 int 1382 intr_release_msix(device_t pci, device_t child, intptr_t xref, int irq) 1383 { 1384 struct intr_irqsrc *isrc; 1385 struct intr_pic *pic; 1386 struct intr_map_data_msi *msi; 1387 int err; 1388 1389 pic = pic_lookup(NULL, xref, FLAG_MSI); 1390 if (pic == NULL) 1391 return (ESRCH); 1392 1393 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 1394 ("%s: Found a non-MSI controller: %s", __func__, 1395 device_get_name(pic->pic_dev))); 1396 1397 msi = (struct intr_map_data_msi *) 1398 intr_map_get_map_data(irq); 1399 KASSERT(msi->hdr.type == INTR_MAP_DATA_MSI, 1400 ("%s: irq %d map data is not MSI", __func__, 1401 irq)); 1402 isrc = msi->isrc; 1403 if (isrc == NULL) { 1404 intr_unmap_irq(irq); 1405 return (EINVAL); 1406 } 1407 1408 err = MSI_RELEASE_MSIX(pic->pic_dev, child, isrc); 1409 intr_unmap_irq(irq); 1410 1411 return (err); 1412 } 1413 1414 int 1415 intr_map_msi(device_t pci, device_t child, intptr_t xref, int irq, 1416 uint64_t *addr, uint32_t *data) 1417 { 1418 struct intr_irqsrc *isrc; 1419 struct intr_pic *pic; 1420 int err; 1421 1422 pic = pic_lookup(NULL, xref, FLAG_MSI); 1423 if (pic == NULL) 1424 return (ESRCH); 1425 1426 KASSERT((pic->pic_flags & FLAG_TYPE_MASK) == FLAG_MSI, 1427 ("%s: Found a non-MSI controller: %s", __func__, 1428 device_get_name(pic->pic_dev))); 1429 1430 isrc = intr_map_get_isrc(irq); 1431 if (isrc == NULL) 1432 return (EINVAL); 1433 1434 err = MSI_MAP_MSI(pic->pic_dev, child, isrc, addr, data); 1435 return (err); 1436 } 1437 1438 1439 void dosoftints(void); 1440 void 1441 dosoftints(void) 1442 { 1443 } 1444 1445 #ifdef SMP 1446 /* 1447 * Init interrupt controller on another CPU. 1448 */ 1449 void 1450 intr_pic_init_secondary(void) 1451 { 1452 1453 /* 1454 * QQQ: Only root PIC is aware of other CPUs ??? 1455 */ 1456 KASSERT(intr_irq_root_dev != NULL, ("%s: no root attached", __func__)); 1457 1458 //mtx_lock(&isrc_table_lock); 1459 PIC_INIT_SECONDARY(intr_irq_root_dev); 1460 //mtx_unlock(&isrc_table_lock); 1461 } 1462 #endif 1463 1464 #ifdef DDB 1465 DB_SHOW_COMMAND(irqs, db_show_irqs) 1466 { 1467 u_int i, irqsum; 1468 u_long num; 1469 struct intr_irqsrc *isrc; 1470 1471 for (irqsum = 0, i = 0; i < NIRQ; i++) { 1472 isrc = irq_sources[i]; 1473 if (isrc == NULL) 1474 continue; 1475 1476 num = isrc->isrc_count != NULL ? isrc->isrc_count[0] : 0; 1477 db_printf("irq%-3u <%s>: cpu %02lx%s cnt %lu\n", i, 1478 isrc->isrc_name, isrc->isrc_cpu.__bits[0], 1479 isrc->isrc_flags & INTR_ISRCF_BOUND ? " (bound)" : "", num); 1480 irqsum += num; 1481 } 1482 db_printf("irq total %u\n", irqsum); 1483 } 1484 #endif 1485 1486 /* 1487 * Interrupt mapping table functions. 1488 * 1489 * Please, keep this part separately, it can be transformed to 1490 * extension of standard resources. 1491 */ 1492 struct intr_map_entry 1493 { 1494 device_t dev; 1495 intptr_t xref; 1496 struct intr_map_data *map_data; 1497 struct intr_irqsrc *isrc; 1498 /* XXX TODO DISCONECTED PICs */ 1499 /*int flags */ 1500 }; 1501 1502 /* XXX Convert irq_map[] to dynamicaly expandable one. */ 1503 static struct intr_map_entry *irq_map[2 * NIRQ]; 1504 static int irq_map_count = nitems(irq_map); 1505 static int irq_map_first_free_idx; 1506 static struct mtx irq_map_lock; 1507 1508 static struct intr_irqsrc * 1509 intr_map_get_isrc(u_int res_id) 1510 { 1511 struct intr_irqsrc *isrc; 1512 1513 mtx_lock(&irq_map_lock); 1514 if ((res_id >= irq_map_count) || (irq_map[res_id] == NULL)) { 1515 mtx_unlock(&irq_map_lock); 1516 return (NULL); 1517 } 1518 isrc = irq_map[res_id]->isrc; 1519 mtx_unlock(&irq_map_lock); 1520 return (isrc); 1521 } 1522 1523 static void 1524 intr_map_set_isrc(u_int res_id, struct intr_irqsrc *isrc) 1525 { 1526 1527 mtx_lock(&irq_map_lock); 1528 if ((res_id >= irq_map_count) || (irq_map[res_id] == NULL)) { 1529 mtx_unlock(&irq_map_lock); 1530 return; 1531 } 1532 irq_map[res_id]->isrc = isrc; 1533 mtx_unlock(&irq_map_lock); 1534 } 1535 1536 /* 1537 * Get a copy of intr_map_entry data 1538 */ 1539 static struct intr_map_data * 1540 intr_map_get_map_data(u_int res_id) 1541 { 1542 struct intr_map_data *data; 1543 1544 data = NULL; 1545 mtx_lock(&irq_map_lock); 1546 if (res_id >= irq_map_count || irq_map[res_id] == NULL) 1547 panic("Attempt to copy invalid resource id: %u\n", res_id); 1548 data = irq_map[res_id]->map_data; 1549 mtx_unlock(&irq_map_lock); 1550 1551 return (data); 1552 } 1553 1554 /* 1555 * Get a copy of intr_map_entry data 1556 */ 1557 static void 1558 intr_map_copy_map_data(u_int res_id, device_t *map_dev, intptr_t *map_xref, 1559 struct intr_map_data **data) 1560 { 1561 size_t len; 1562 1563 len = 0; 1564 mtx_lock(&irq_map_lock); 1565 if (res_id >= irq_map_count || irq_map[res_id] == NULL) 1566 panic("Attempt to copy invalid resource id: %u\n", res_id); 1567 if (irq_map[res_id]->map_data != NULL) 1568 len = irq_map[res_id]->map_data->len; 1569 mtx_unlock(&irq_map_lock); 1570 1571 if (len == 0) 1572 *data = NULL; 1573 else 1574 *data = malloc(len, M_INTRNG, M_WAITOK | M_ZERO); 1575 mtx_lock(&irq_map_lock); 1576 if (irq_map[res_id] == NULL) 1577 panic("Attempt to copy invalid resource id: %u\n", res_id); 1578 if (len != 0) { 1579 if (len != irq_map[res_id]->map_data->len) 1580 panic("Resource id: %u has changed.\n", res_id); 1581 memcpy(*data, irq_map[res_id]->map_data, len); 1582 } 1583 *map_dev = irq_map[res_id]->dev; 1584 *map_xref = irq_map[res_id]->xref; 1585 mtx_unlock(&irq_map_lock); 1586 } 1587 1588 1589 /* 1590 * Allocate and fill new entry in irq_map table. 1591 */ 1592 u_int 1593 intr_map_irq(device_t dev, intptr_t xref, struct intr_map_data *data) 1594 { 1595 u_int i; 1596 struct intr_map_entry *entry; 1597 1598 /* Prepare new entry first. */ 1599 entry = malloc(sizeof(*entry), M_INTRNG, M_WAITOK | M_ZERO); 1600 1601 entry->dev = dev; 1602 entry->xref = xref; 1603 entry->map_data = data; 1604 entry->isrc = NULL; 1605 1606 mtx_lock(&irq_map_lock); 1607 for (i = irq_map_first_free_idx; i < irq_map_count; i++) { 1608 if (irq_map[i] == NULL) { 1609 irq_map[i] = entry; 1610 irq_map_first_free_idx = i + 1; 1611 mtx_unlock(&irq_map_lock); 1612 return (i); 1613 } 1614 } 1615 mtx_unlock(&irq_map_lock); 1616 1617 /* XXX Expand irq_map table */ 1618 panic("IRQ mapping table is full."); 1619 } 1620 1621 /* 1622 * Remove and free mapping entry. 1623 */ 1624 void 1625 intr_unmap_irq(u_int res_id) 1626 { 1627 struct intr_map_entry *entry; 1628 1629 mtx_lock(&irq_map_lock); 1630 if ((res_id >= irq_map_count) || (irq_map[res_id] == NULL)) 1631 panic("Attempt to unmap invalid resource id: %u\n", res_id); 1632 entry = irq_map[res_id]; 1633 irq_map[res_id] = NULL; 1634 irq_map_first_free_idx = res_id; 1635 mtx_unlock(&irq_map_lock); 1636 intr_free_intr_map_data(entry->map_data); 1637 free(entry, M_INTRNG); 1638 } 1639 1640 /* 1641 * Clone mapping entry. 1642 */ 1643 u_int 1644 intr_map_clone_irq(u_int old_res_id) 1645 { 1646 device_t map_dev; 1647 intptr_t map_xref; 1648 struct intr_map_data *data; 1649 1650 intr_map_copy_map_data(old_res_id, &map_dev, &map_xref, &data); 1651 return (intr_map_irq(map_dev, map_xref, data)); 1652 } 1653 1654 static void 1655 intr_map_init(void *dummy __unused) 1656 { 1657 1658 mtx_init(&irq_map_lock, "intr map table", NULL, MTX_DEF); 1659 } 1660 SYSINIT(intr_map_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_map_init, NULL); 1661