Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/apb.c
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1 /*- 2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * 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: releng/11.0/sys/mips/atheros/apb.c 299418 2016-05-11 09:42:24Z trasz $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/interrupt.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 #include <sys/malloc.h> 39 #include <sys/pcpu.h> 40 #include <sys/proc.h> 41 #include <sys/pmc.h> 42 #include <sys/pmckern.h> 43 44 #include <machine/bus.h> 45 #include <machine/intr_machdep.h> 46 47 #include <mips/atheros/apbvar.h> 48 #include <mips/atheros/ar71xxreg.h> 49 #include <mips/atheros/ar71xx_setup.h> 50 51 #define APB_INTR_PMC 5 52 53 #undef APB_DEBUG 54 #ifdef APB_DEBUG 55 #define dprintf printf 56 #else 57 #define dprintf(x, arg...) 58 #endif /* APB_DEBUG */ 59 60 #define DEVTOAPB(dev) ((struct apb_ivar *) device_get_ivars(dev)) 61 62 static int apb_activate_resource(device_t, device_t, int, int, 63 struct resource *); 64 static device_t apb_add_child(device_t, u_int, const char *, int); 65 static struct resource * 66 apb_alloc_resource(device_t, device_t, int, int *, rman_res_t, 67 rman_res_t, rman_res_t, u_int); 68 static int apb_attach(device_t); 69 static int apb_deactivate_resource(device_t, device_t, int, int, 70 struct resource *); 71 static struct resource_list * 72 apb_get_resource_list(device_t, device_t); 73 static void apb_hinted_child(device_t, const char *, int); 74 static int apb_filter(void *); 75 static int apb_probe(device_t); 76 static int apb_release_resource(device_t, device_t, int, int, 77 struct resource *); 78 static int apb_setup_intr(device_t, device_t, struct resource *, int, 79 driver_filter_t *, driver_intr_t *, void *, void **); 80 static int apb_teardown_intr(device_t, device_t, struct resource *, 81 void *); 82 83 static void 84 apb_mask_irq(void *source) 85 { 86 unsigned int irq = (unsigned int)source; 87 uint32_t reg; 88 89 reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK); 90 ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg & ~(1 << irq)); 91 92 } 93 94 static void 95 apb_unmask_irq(void *source) 96 { 97 uint32_t reg; 98 unsigned int irq = (unsigned int)source; 99 100 reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK); 101 ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg | (1 << irq)); 102 } 103 104 static int 105 apb_probe(device_t dev) 106 { 107 108 return (BUS_PROBE_NOWILDCARD); 109 } 110 111 static int 112 apb_attach(device_t dev) 113 { 114 struct apb_softc *sc = device_get_softc(dev); 115 int rid = 0; 116 117 device_set_desc(dev, "APB Bus bridge"); 118 119 sc->apb_mem_rman.rm_type = RMAN_ARRAY; 120 sc->apb_mem_rman.rm_descr = "APB memory window"; 121 122 if (rman_init(&sc->apb_mem_rman) != 0 || 123 rman_manage_region(&sc->apb_mem_rman, 124 AR71XX_APB_BASE, 125 AR71XX_APB_BASE + AR71XX_APB_SIZE - 1) != 0) 126 panic("apb_attach: failed to set up memory rman"); 127 128 sc->apb_irq_rman.rm_type = RMAN_ARRAY; 129 sc->apb_irq_rman.rm_descr = "APB IRQ"; 130 131 if (rman_init(&sc->apb_irq_rman) != 0 || 132 rman_manage_region(&sc->apb_irq_rman, 133 APB_IRQ_BASE, APB_IRQ_END) != 0) 134 panic("apb_attach: failed to set up IRQ rman"); 135 136 if ((sc->sc_misc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 137 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 138 device_printf(dev, "unable to allocate IRQ resource\n"); 139 return (ENXIO); 140 } 141 142 if ((bus_setup_intr(dev, sc->sc_misc_irq, INTR_TYPE_MISC, 143 apb_filter, NULL, sc, &sc->sc_misc_ih))) { 144 device_printf(dev, 145 "WARNING: unable to register interrupt handler\n"); 146 return (ENXIO); 147 } 148 149 bus_generic_probe(dev); 150 bus_enumerate_hinted_children(dev); 151 bus_generic_attach(dev); 152 153 /* 154 * Unmask performance counter IRQ 155 */ 156 apb_unmask_irq((void*)APB_INTR_PMC); 157 sc->sc_intr_counter[APB_INTR_PMC] = mips_intrcnt_create("apb irq5: pmc"); 158 159 return (0); 160 } 161 162 static struct resource * 163 apb_alloc_resource(device_t bus, device_t child, int type, int *rid, 164 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 165 { 166 struct apb_softc *sc = device_get_softc(bus); 167 struct apb_ivar *ivar = device_get_ivars(child); 168 struct resource *rv; 169 struct resource_list_entry *rle; 170 struct rman *rm; 171 int isdefault, needactivate, passthrough; 172 173 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end)); 174 needactivate = flags & RF_ACTIVE; 175 /* 176 * Pass memory requests to nexus device 177 */ 178 passthrough = (device_get_parent(child) != bus); 179 rle = NULL; 180 181 dprintf("%s: entry (%p, %p, %d, %d, %p, %p, %jd, %d)\n", 182 __func__, bus, child, type, *rid, (void *)(intptr_t)start, 183 (void *)(intptr_t)end, count, flags); 184 185 if (passthrough) 186 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, 187 rid, start, end, count, flags)); 188 189 /* 190 * If this is an allocation of the "default" range for a given RID, 191 * and we know what the resources for this device are (ie. they aren't 192 * maintained by a child bus), then work out the start/end values. 193 */ 194 195 if (isdefault) { 196 rle = resource_list_find(&ivar->resources, type, *rid); 197 if (rle == NULL) { 198 return (NULL); 199 } 200 201 if (rle->res != NULL) { 202 panic("%s: resource entry is busy", __func__); 203 } 204 start = rle->start; 205 end = rle->end; 206 count = rle->count; 207 208 dprintf("%s: default resource (%p, %p, %ld)\n", 209 __func__, (void *)(intptr_t)start, 210 (void *)(intptr_t)end, count); 211 } 212 213 switch (type) { 214 case SYS_RES_IRQ: 215 rm = &sc->apb_irq_rman; 216 break; 217 case SYS_RES_MEMORY: 218 rm = &sc->apb_mem_rman; 219 break; 220 default: 221 printf("%s: unknown resource type %d\n", __func__, type); 222 return (0); 223 } 224 225 rv = rman_reserve_resource(rm, start, end, count, flags, child); 226 if (rv == NULL) { 227 printf("%s: could not reserve resource\n", __func__); 228 return (0); 229 } 230 231 rman_set_rid(rv, *rid); 232 233 if (needactivate) { 234 if (bus_activate_resource(child, type, *rid, rv)) { 235 printf("%s: could not activate resource\n", __func__); 236 rman_release_resource(rv); 237 return (0); 238 } 239 } 240 241 return (rv); 242 } 243 244 static int 245 apb_activate_resource(device_t bus, device_t child, int type, int rid, 246 struct resource *r) 247 { 248 249 /* XXX: should we mask/unmask IRQ here? */ 250 return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child, 251 type, rid, r)); 252 } 253 254 static int 255 apb_deactivate_resource(device_t bus, device_t child, int type, int rid, 256 struct resource *r) 257 { 258 259 /* XXX: should we mask/unmask IRQ here? */ 260 return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child, 261 type, rid, r)); 262 } 263 264 static int 265 apb_release_resource(device_t dev, device_t child, int type, 266 int rid, struct resource *r) 267 { 268 struct resource_list *rl; 269 struct resource_list_entry *rle; 270 271 rl = apb_get_resource_list(dev, child); 272 if (rl == NULL) 273 return (EINVAL); 274 rle = resource_list_find(rl, type, rid); 275 if (rle == NULL) 276 return (EINVAL); 277 rman_release_resource(r); 278 rle->res = NULL; 279 280 return (0); 281 } 282 283 static int 284 apb_setup_intr(device_t bus, device_t child, struct resource *ires, 285 int flags, driver_filter_t *filt, driver_intr_t *handler, 286 void *arg, void **cookiep) 287 { 288 struct apb_softc *sc = device_get_softc(bus); 289 struct intr_event *event; 290 int irq, error; 291 292 irq = rman_get_start(ires); 293 294 if (irq > APB_IRQ_END) 295 panic("%s: bad irq %d", __func__, irq); 296 297 event = sc->sc_eventstab[irq]; 298 if (event == NULL) { 299 error = intr_event_create(&event, (void *)irq, 0, irq, 300 apb_mask_irq, apb_unmask_irq, 301 NULL, NULL, 302 "apb intr%d:", irq); 303 304 if (error == 0) { 305 sc->sc_eventstab[irq] = event; 306 sc->sc_intr_counter[irq] = 307 mips_intrcnt_create(event->ie_name); 308 } 309 else 310 return (error); 311 } 312 313 intr_event_add_handler(event, device_get_nameunit(child), filt, 314 handler, arg, intr_priority(flags), flags, cookiep); 315 mips_intrcnt_setname(sc->sc_intr_counter[irq], event->ie_fullname); 316 317 apb_unmask_irq((void*)irq); 318 319 return (0); 320 } 321 322 static int 323 apb_teardown_intr(device_t dev, device_t child, struct resource *ires, 324 void *cookie) 325 { 326 struct apb_softc *sc = device_get_softc(dev); 327 int irq, result; 328 329 irq = rman_get_start(ires); 330 if (irq > APB_IRQ_END) 331 panic("%s: bad irq %d", __func__, irq); 332 333 if (sc->sc_eventstab[irq] == NULL) 334 panic("Trying to teardown unoccupied IRQ"); 335 336 apb_mask_irq((void*)irq); 337 338 result = intr_event_remove_handler(cookie); 339 if (!result) 340 sc->sc_eventstab[irq] = NULL; 341 342 return (result); 343 } 344 345 static int 346 apb_filter(void *arg) 347 { 348 struct apb_softc *sc = arg; 349 struct intr_event *event; 350 uint32_t reg, irq; 351 struct thread *td; 352 struct trapframe *tf; 353 354 reg = ATH_READ_REG(AR71XX_MISC_INTR_STATUS); 355 for (irq = 0; irq < APB_NIRQS; irq++) { 356 if (reg & (1 << irq)) { 357 358 switch (ar71xx_soc) { 359 case AR71XX_SOC_AR7240: 360 case AR71XX_SOC_AR7241: 361 case AR71XX_SOC_AR7242: 362 case AR71XX_SOC_AR9330: 363 case AR71XX_SOC_AR9331: 364 case AR71XX_SOC_AR9341: 365 case AR71XX_SOC_AR9342: 366 case AR71XX_SOC_AR9344: 367 case AR71XX_SOC_QCA9533: 368 case AR71XX_SOC_QCA9533_V2: 369 case AR71XX_SOC_QCA9556: 370 case AR71XX_SOC_QCA9558: 371 /* ACK/clear the given interrupt */ 372 ATH_WRITE_REG(AR71XX_MISC_INTR_STATUS, 373 (1 << irq)); 374 break; 375 default: 376 /* fallthrough */ 377 break; 378 } 379 380 event = sc->sc_eventstab[irq]; 381 /* always count interrupts; spurious or otherwise */ 382 mips_intrcnt_inc(sc->sc_intr_counter[irq]); 383 if (!event || TAILQ_EMPTY(&event->ie_handlers)) { 384 if (irq == APB_INTR_PMC) { 385 td = PCPU_GET(curthread); 386 tf = td->td_intr_frame; 387 388 if (pmc_intr) 389 (*pmc_intr)(PCPU_GET(cpuid), tf); 390 continue; 391 } 392 /* Ignore timer interrupts */ 393 if (irq != 0 && irq != 8 && irq != 9 && irq != 10) 394 printf("Stray APB IRQ %d\n", irq); 395 continue; 396 } 397 398 intr_event_handle(event, PCPU_GET(curthread)->td_intr_frame); 399 } 400 } 401 402 return (FILTER_HANDLED); 403 } 404 405 static void 406 apb_hinted_child(device_t bus, const char *dname, int dunit) 407 { 408 device_t child; 409 long maddr; 410 int msize; 411 int irq; 412 int result; 413 int mem_hints_count; 414 415 child = BUS_ADD_CHILD(bus, 0, dname, dunit); 416 417 /* 418 * Set hard-wired resources for hinted child using 419 * specific RIDs. 420 */ 421 mem_hints_count = 0; 422 if (resource_long_value(dname, dunit, "maddr", &maddr) == 0) 423 mem_hints_count++; 424 if (resource_int_value(dname, dunit, "msize", &msize) == 0) 425 mem_hints_count++; 426 427 /* check if all info for mem resource has been provided */ 428 if ((mem_hints_count > 0) && (mem_hints_count < 2)) { 429 printf("Either maddr or msize hint is missing for %s%d\n", 430 dname, dunit); 431 } else if (mem_hints_count) { 432 result = bus_set_resource(child, SYS_RES_MEMORY, 0, 433 maddr, msize); 434 if (result != 0) 435 device_printf(bus, 436 "warning: bus_set_resource() failed\n"); 437 } 438 439 if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 440 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 441 if (result != 0) 442 device_printf(bus, 443 "warning: bus_set_resource() failed\n"); 444 } 445 } 446 447 static device_t 448 apb_add_child(device_t bus, u_int order, const char *name, int unit) 449 { 450 device_t child; 451 struct apb_ivar *ivar; 452 453 ivar = malloc(sizeof(struct apb_ivar), M_DEVBUF, M_WAITOK | M_ZERO); 454 resource_list_init(&ivar->resources); 455 456 child = device_add_child_ordered(bus, order, name, unit); 457 if (child == NULL) { 458 printf("Can't add child %s%d ordered\n", name, unit); 459 return (0); 460 } 461 462 device_set_ivars(child, ivar); 463 464 return (child); 465 } 466 467 /* 468 * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource 469 * Provides pointer to resource_list for these routines 470 */ 471 static struct resource_list * 472 apb_get_resource_list(device_t dev, device_t child) 473 { 474 struct apb_ivar *ivar; 475 476 ivar = device_get_ivars(child); 477 return (&(ivar->resources)); 478 } 479 480 static int 481 apb_print_all_resources(device_t dev) 482 { 483 struct apb_ivar *ndev = DEVTOAPB(dev); 484 struct resource_list *rl = &ndev->resources; 485 int retval = 0; 486 487 if (STAILQ_FIRST(rl)) 488 retval += printf(" at"); 489 490 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx"); 491 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 492 493 return (retval); 494 } 495 496 static int 497 apb_print_child(device_t bus, device_t child) 498 { 499 int retval = 0; 500 501 retval += bus_print_child_header(bus, child); 502 retval += apb_print_all_resources(child); 503 if (device_get_flags(child)) 504 retval += printf(" flags %#x", device_get_flags(child)); 505 retval += printf(" on %s\n", device_get_nameunit(bus)); 506 507 return (retval); 508 } 509 510 511 static device_method_t apb_methods[] = { 512 DEVMETHOD(bus_activate_resource, apb_activate_resource), 513 DEVMETHOD(bus_add_child, apb_add_child), 514 DEVMETHOD(bus_alloc_resource, apb_alloc_resource), 515 DEVMETHOD(bus_deactivate_resource, apb_deactivate_resource), 516 DEVMETHOD(bus_get_resource_list, apb_get_resource_list), 517 DEVMETHOD(bus_hinted_child, apb_hinted_child), 518 DEVMETHOD(bus_release_resource, apb_release_resource), 519 DEVMETHOD(bus_setup_intr, apb_setup_intr), 520 DEVMETHOD(bus_teardown_intr, apb_teardown_intr), 521 DEVMETHOD(device_attach, apb_attach), 522 DEVMETHOD(device_probe, apb_probe), 523 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 524 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 525 DEVMETHOD(bus_print_child, apb_print_child), 526 527 DEVMETHOD_END 528 }; 529 530 static driver_t apb_driver = { 531 "apb", 532 apb_methods, 533 sizeof(struct apb_softc), 534 }; 535 static devclass_t apb_devclass; 536 537 DRIVER_MODULE(apb, nexus, apb_driver, apb_devclass, 0, 0);
Cache object: 538fe657071850ac3308ef6ff2405270
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