1 /* $NetBSD: linux_pci.c,v 1.6 2018/08/28 03:41:39 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: linux_pci.c,v 1.6 2018/08/28 03:41:39 riastradh Exp $"); 34 35 #include <linux/pci.h> 36 37 #include <drm/drm_agp_netbsd.h> 38 39 device_t 40 pci_dev_dev(struct pci_dev *pdev) 41 { 42 43 return pdev->pd_dev; 44 } 45 46 /* XXX Nouveau kludge! */ 47 struct drm_device * 48 pci_get_drvdata(struct pci_dev *pdev) 49 { 50 51 return pdev->pd_drm_dev; 52 } 53 54 void 55 linux_pci_dev_init(struct pci_dev *pdev, device_t dev, device_t parent, 56 const struct pci_attach_args *pa, int kludges) 57 { 58 const uint32_t subsystem_id = pci_conf_read(pa->pa_pc, pa->pa_tag, 59 PCI_SUBSYS_ID_REG); 60 unsigned i; 61 62 memset(pdev, 0, sizeof(*pdev)); /* paranoia */ 63 64 pdev->pd_pa = *pa; 65 pdev->pd_kludges = kludges; 66 pdev->pd_rom_vaddr = NULL; 67 pdev->pd_dev = dev; 68 #if (NACPICA > 0) 69 pdev->pd_ad = acpi_pcidev_find(0 /*XXX segment*/, pa->pa_bus, 70 pa->pa_device, pa->pa_function); 71 #else 72 pdev->pd_ad = NULL; 73 #endif 74 pdev->pd_saved_state = NULL; 75 pdev->pd_intr_handles = NULL; 76 pdev->bus = kmem_zalloc(sizeof(*pdev->bus), KM_NOSLEEP); 77 pdev->bus->pb_pc = pa->pa_pc; 78 pdev->bus->pb_dev = parent; 79 pdev->bus->number = pa->pa_bus; 80 pdev->devfn = PCI_DEVFN(pa->pa_device, pa->pa_function); 81 pdev->vendor = PCI_VENDOR(pa->pa_id); 82 pdev->device = PCI_PRODUCT(pa->pa_id); 83 pdev->subsystem_vendor = PCI_SUBSYS_VENDOR(subsystem_id); 84 pdev->subsystem_device = PCI_SUBSYS_ID(subsystem_id); 85 pdev->revision = PCI_REVISION(pa->pa_class); 86 pdev->class = __SHIFTOUT(pa->pa_class, 0xffffff00UL); /* ? */ 87 88 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 89 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 90 const int reg = PCI_BAR(i); 91 92 pdev->pd_resources[i].type = pci_mapreg_type(pa->pa_pc, 93 pa->pa_tag, reg); 94 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 95 pdev->pd_resources[i].type, 96 &pdev->pd_resources[i].addr, 97 &pdev->pd_resources[i].size, 98 &pdev->pd_resources[i].flags)) { 99 pdev->pd_resources[i].addr = 0; 100 pdev->pd_resources[i].size = 0; 101 pdev->pd_resources[i].flags = 0; 102 } 103 pdev->pd_resources[i].kva = NULL; 104 pdev->pd_resources[i].mapped = false; 105 } 106 } 107 108 int 109 pci_find_capability(struct pci_dev *pdev, int cap) 110 { 111 112 return pci_get_capability(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, cap, 113 NULL, NULL); 114 } 115 116 int 117 pci_read_config_dword(struct pci_dev *pdev, int reg, uint32_t *valuep) 118 { 119 120 KASSERT(!ISSET(reg, 3)); 121 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg); 122 return 0; 123 } 124 125 int 126 pci_read_config_word(struct pci_dev *pdev, int reg, uint16_t *valuep) 127 { 128 129 KASSERT(!ISSET(reg, 1)); 130 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 131 (reg &~ 2)) >> (8 * (reg & 2)); 132 return 0; 133 } 134 135 int 136 pci_read_config_byte(struct pci_dev *pdev, int reg, uint8_t *valuep) 137 { 138 139 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 140 (reg &~ 3)) >> (8 * (reg & 3)); 141 return 0; 142 } 143 144 int 145 pci_write_config_dword(struct pci_dev *pdev, int reg, uint32_t value) 146 { 147 148 KASSERT(!ISSET(reg, 3)); 149 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, value); 150 return 0; 151 } 152 153 int 154 pci_bus_read_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 155 uint32_t *valuep) 156 { 157 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 158 PCI_FUNC(devfn)); 159 160 KASSERT(!ISSET(reg, 1)); 161 *valuep = pci_conf_read(bus->pb_pc, tag, reg & ~3) >> (8 * (reg & 3)); 162 return 0; 163 } 164 165 int 166 pci_bus_read_config_word(struct pci_bus *bus, unsigned devfn, int reg, 167 uint16_t *valuep) 168 { 169 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 170 PCI_FUNC(devfn)); 171 172 KASSERT(!ISSET(reg, 1)); 173 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 2) >> (8 * (reg & 2)); 174 return 0; 175 } 176 177 int 178 pci_bus_read_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 179 uint8_t *valuep) 180 { 181 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 182 PCI_FUNC(devfn)); 183 184 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 3) >> (8 * (reg & 3)); 185 return 0; 186 } 187 188 int 189 pci_bus_write_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 190 uint32_t value) 191 { 192 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 193 PCI_FUNC(devfn)); 194 195 KASSERT(!ISSET(reg, 3)); 196 pci_conf_write(bus->pb_pc, tag, reg, value); 197 return 0; 198 } 199 200 static void 201 pci_rmw_config(pci_chipset_tag_t pc, pcitag_t tag, int reg, unsigned int bytes, 202 uint32_t value) 203 { 204 const uint32_t mask = ~((~0UL) << (8 * bytes)); 205 const int reg32 = (reg &~ 3); 206 const unsigned int shift = (8 * (reg & 3)); 207 uint32_t value32; 208 209 KASSERT(bytes <= 4); 210 KASSERT(!ISSET(value, ~mask)); 211 value32 = pci_conf_read(pc, tag, reg32); 212 value32 &=~ (mask << shift); 213 value32 |= (value << shift); 214 pci_conf_write(pc, tag, reg32, value32); 215 } 216 217 int 218 pci_write_config_word(struct pci_dev *pdev, int reg, uint16_t value) 219 { 220 221 KASSERT(!ISSET(reg, 1)); 222 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 2, value); 223 return 0; 224 } 225 226 int 227 pci_write_config_byte(struct pci_dev *pdev, int reg, uint8_t value) 228 { 229 230 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 1, value); 231 return 0; 232 } 233 234 int 235 pci_bus_write_config_word(struct pci_bus *bus, unsigned devfn, int reg, 236 uint16_t value) 237 { 238 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 239 PCI_FUNC(devfn)); 240 241 KASSERT(!ISSET(reg, 1)); 242 pci_rmw_config(bus->pb_pc, tag, reg, 2, value); 243 return 0; 244 } 245 246 int 247 pci_bus_write_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 248 uint8_t value) 249 { 250 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 251 PCI_FUNC(devfn)); 252 253 pci_rmw_config(bus->pb_pc, tag, reg, 1, value); 254 return 0; 255 } 256 257 int 258 pci_enable_msi(struct pci_dev *pdev) 259 { 260 #ifdef notyet 261 const struct pci_attach_args *const pa = &pdev->pd_pa; 262 263 if (pci_msi_alloc_exact(pa, &pdev->pd_intr_handles, 1)) 264 return -EINVAL; 265 266 pdev->msi_enabled = 1; 267 return 0; 268 #else 269 return -ENOSYS; 270 #endif 271 } 272 273 void 274 pci_disable_msi(struct pci_dev *pdev __unused) 275 { 276 const struct pci_attach_args *const pa = &pdev->pd_pa; 277 278 if (pdev->pd_intr_handles != NULL) { 279 pci_intr_release(pa->pa_pc, pdev->pd_intr_handles, 1); 280 pdev->pd_intr_handles = NULL; 281 } 282 pdev->msi_enabled = 0; 283 } 284 285 void 286 pci_set_master(struct pci_dev *pdev) 287 { 288 pcireg_t csr; 289 290 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 291 PCI_COMMAND_STATUS_REG); 292 csr |= PCI_COMMAND_MASTER_ENABLE; 293 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 294 PCI_COMMAND_STATUS_REG, csr); 295 } 296 297 void 298 pci_clear_master(struct pci_dev *pdev) 299 { 300 pcireg_t csr; 301 302 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 303 PCI_COMMAND_STATUS_REG); 304 csr &= ~(pcireg_t)PCI_COMMAND_MASTER_ENABLE; 305 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 306 PCI_COMMAND_STATUS_REG, csr); 307 } 308 309 bus_addr_t 310 pcibios_align_resource(void *p, const struct resource *resource, 311 bus_addr_t addr, bus_size_t size) 312 { 313 panic("pcibios_align_resource has accessed unaligned neurons!"); 314 } 315 316 int 317 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *resource, 318 bus_size_t size, bus_size_t align, bus_addr_t start, int type __unused, 319 bus_addr_t (*align_fn)(void *, const struct resource *, bus_addr_t, 320 bus_size_t) __unused, 321 struct pci_dev *pdev) 322 { 323 const struct pci_attach_args *const pa = &pdev->pd_pa; 324 bus_space_tag_t bst; 325 int error; 326 327 switch (resource->flags) { 328 case IORESOURCE_MEM: 329 bst = pa->pa_memt; 330 break; 331 332 case IORESOURCE_IO: 333 bst = pa->pa_iot; 334 break; 335 336 default: 337 panic("I don't know what kind of resource you want!"); 338 } 339 340 resource->r_bst = bst; 341 error = bus_space_alloc(bst, start, __type_max(bus_addr_t), 342 size, align, 0, 0, &resource->start, &resource->r_bsh); 343 if (error) 344 return error; 345 346 resource->size = size; 347 return 0; 348 } 349 350 /* 351 * XXX Mega-kludgerific! pci_get_bus_and_slot and pci_get_class are 352 * defined only for their single purposes in i915drm, in 353 * i915_get_bridge_dev and intel_detect_pch. We can't define them more 354 * generally without adapting pci_find_device (and pci_enumerate_bus 355 * internally) to pass a cookie through. 356 */ 357 358 static int 359 pci_kludgey_match_bus0_dev0_func0(const struct pci_attach_args *pa) 360 { 361 362 if (pa->pa_bus != 0) 363 return 0; 364 if (pa->pa_device != 0) 365 return 0; 366 if (pa->pa_function != 0) 367 return 0; 368 369 return 1; 370 } 371 372 struct pci_dev * 373 pci_get_bus_and_slot(int bus, int slot) 374 { 375 struct pci_attach_args pa; 376 377 KASSERT(bus == 0); 378 KASSERT(slot == PCI_DEVFN(0, 0)); 379 380 if (!pci_find_device(&pa, &pci_kludgey_match_bus0_dev0_func0)) 381 return NULL; 382 383 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 384 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 385 386 return pdev; 387 } 388 389 static int 390 pci_kludgey_match_isa_bridge(const struct pci_attach_args *pa) 391 { 392 393 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 394 return 0; 395 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_BRIDGE_ISA) 396 return 0; 397 398 return 1; 399 } 400 401 void 402 pci_dev_put(struct pci_dev *pdev) 403 { 404 405 if (pdev == NULL) 406 return; 407 408 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_GET_MUMBLE)); 409 kmem_free(pdev->bus, sizeof(*pdev->bus)); 410 kmem_free(pdev, sizeof(*pdev)); 411 } 412 413 struct pci_dev * /* XXX i915 kludge */ 414 pci_get_class(uint32_t class_subclass_shifted __unused, struct pci_dev *from) 415 { 416 struct pci_attach_args pa; 417 418 KASSERT(class_subclass_shifted == (PCI_CLASS_BRIDGE_ISA << 8)); 419 420 if (from != NULL) { 421 pci_dev_put(from); 422 return NULL; 423 } 424 425 if (!pci_find_device(&pa, &pci_kludgey_match_isa_bridge)) 426 return NULL; 427 428 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 429 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 430 431 return pdev; 432 } 433 434 void 435 pci_unmap_rom(struct pci_dev *pdev, void __pci_rom_iomem *vaddr __unused) 436 { 437 438 /* XXX Disable the ROM address decoder. */ 439 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 440 KASSERT(vaddr == pdev->pd_rom_vaddr); 441 bus_space_unmap(pdev->pd_rom_bst, pdev->pd_rom_bsh, pdev->pd_rom_size); 442 pdev->pd_kludges &= ~NBPCI_KLUDGE_MAP_ROM; 443 pdev->pd_rom_vaddr = NULL; 444 } 445 446 /* XXX Whattakludge! Should move this in sys/arch/. */ 447 static int 448 pci_map_rom_md(struct pci_dev *pdev) 449 { 450 #if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) 451 const bus_addr_t rom_base = 0xc0000; 452 const bus_size_t rom_size = 0x20000; 453 bus_space_handle_t rom_bsh; 454 int error; 455 456 if (PCI_CLASS(pdev->pd_pa.pa_class) != PCI_CLASS_DISPLAY) 457 return ENXIO; 458 if (PCI_SUBCLASS(pdev->pd_pa.pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 459 return ENXIO; 460 /* XXX Check whether this is the primary VGA card? */ 461 error = bus_space_map(pdev->pd_pa.pa_memt, rom_base, rom_size, 462 (BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE), &rom_bsh); 463 if (error) 464 return ENXIO; 465 466 pdev->pd_rom_bst = pdev->pd_pa.pa_memt; 467 pdev->pd_rom_bsh = rom_bsh; 468 pdev->pd_rom_size = rom_size; 469 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 470 471 return 0; 472 #else 473 return ENXIO; 474 #endif 475 } 476 477 void __pci_rom_iomem * 478 pci_map_rom(struct pci_dev *pdev, size_t *sizep) 479 { 480 481 KASSERT(!ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 482 483 if (pci_mapreg_map(&pdev->pd_pa, PCI_MAPREG_ROM, PCI_MAPREG_TYPE_ROM, 484 (BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR), 485 &pdev->pd_rom_bst, &pdev->pd_rom_bsh, NULL, &pdev->pd_rom_size) 486 != 0) 487 goto fail_mi; 488 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 489 490 /* XXX This type is obviously wrong in general... */ 491 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 492 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 493 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 494 pci_unmap_rom(pdev, NULL); 495 goto fail_mi; 496 } 497 goto success; 498 499 fail_mi: 500 if (pci_map_rom_md(pdev) != 0) 501 goto fail_md; 502 503 /* XXX This type is obviously wrong in general... */ 504 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 505 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 506 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 507 pci_unmap_rom(pdev, NULL); 508 goto fail_md; 509 } 510 511 success: 512 KASSERT(pdev->pd_rom_found_size <= SIZE_T_MAX); 513 *sizep = pdev->pd_rom_found_size; 514 pdev->pd_rom_vaddr = bus_space_vaddr(pdev->pd_rom_bst, 515 pdev->pd_rom_found_bsh); 516 return pdev->pd_rom_vaddr; 517 518 fail_md: 519 return NULL; 520 } 521 522 void __pci_rom_iomem * 523 pci_platform_rom(struct pci_dev *pdev __unused, size_t *sizep) 524 { 525 526 *sizep = 0; 527 return NULL; 528 } 529 530 int 531 pci_enable_rom(struct pci_dev *pdev) 532 { 533 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 534 const pcitag_t tag = pdev->pd_pa.pa_tag; 535 pcireg_t addr; 536 int s; 537 538 /* XXX Don't do anything if the ROM isn't there. */ 539 540 s = splhigh(); 541 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 542 addr |= PCI_MAPREG_ROM_ENABLE; 543 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 544 splx(s); 545 546 return 0; 547 } 548 549 void 550 pci_disable_rom(struct pci_dev *pdev) 551 { 552 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 553 const pcitag_t tag = pdev->pd_pa.pa_tag; 554 pcireg_t addr; 555 int s; 556 557 s = splhigh(); 558 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 559 addr &= ~(pcireg_t)PCI_MAPREG_ROM_ENABLE; 560 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 561 splx(s); 562 } 563 564 bus_addr_t 565 pci_resource_start(struct pci_dev *pdev, unsigned i) 566 { 567 568 KASSERT(i < PCI_NUM_RESOURCES); 569 return pdev->pd_resources[i].addr; 570 } 571 572 bus_size_t 573 pci_resource_len(struct pci_dev *pdev, unsigned i) 574 { 575 576 KASSERT(i < PCI_NUM_RESOURCES); 577 return pdev->pd_resources[i].size; 578 } 579 580 bus_addr_t 581 pci_resource_end(struct pci_dev *pdev, unsigned i) 582 { 583 584 return pci_resource_start(pdev, i) + (pci_resource_len(pdev, i) - 1); 585 } 586 587 int 588 pci_resource_flags(struct pci_dev *pdev, unsigned i) 589 { 590 591 KASSERT(i < PCI_NUM_RESOURCES); 592 return pdev->pd_resources[i].flags; 593 } 594 595 void __pci_iomem * 596 pci_iomap(struct pci_dev *pdev, unsigned i, bus_size_t size) 597 { 598 int error; 599 600 KASSERT(i < PCI_NUM_RESOURCES); 601 KASSERT(pdev->pd_resources[i].kva == NULL); 602 603 if (PCI_MAPREG_TYPE(pdev->pd_resources[i].type) != PCI_MAPREG_TYPE_MEM) 604 return NULL; 605 if (pdev->pd_resources[i].size < size) 606 return NULL; 607 error = bus_space_map(pdev->pd_pa.pa_memt, pdev->pd_resources[i].addr, 608 size, BUS_SPACE_MAP_LINEAR | pdev->pd_resources[i].flags, 609 &pdev->pd_resources[i].bsh); 610 if (error) 611 return NULL; 612 /* XXX Synchronize with drm_agp_borrow_hook in drm_agpsupport.c. */ 613 pdev->pd_resources[i].bst = pdev->pd_pa.pa_memt; 614 pdev->pd_resources[i].kva = bus_space_vaddr(pdev->pd_resources[i].bst, 615 pdev->pd_resources[i].bsh); 616 pdev->pd_resources[i].mapped = true; 617 618 return pdev->pd_resources[i].kva; 619 } 620 621 void 622 pci_iounmap(struct pci_dev *pdev, void __pci_iomem *kva) 623 { 624 unsigned i; 625 626 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 627 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 628 if (pdev->pd_resources[i].kva == kva) 629 break; 630 } 631 KASSERT(i < PCI_NUM_RESOURCES); 632 633 pdev->pd_resources[i].kva = NULL; 634 bus_space_unmap(pdev->pd_resources[i].bst, pdev->pd_resources[i].bsh, 635 pdev->pd_resources[i].size); 636 } 637 638 void 639 pci_save_state(struct pci_dev *pdev) 640 { 641 642 KASSERT(pdev->pd_saved_state == NULL); 643 pdev->pd_saved_state = kmem_alloc(sizeof(*pdev->pd_saved_state), 644 KM_SLEEP); 645 pci_conf_capture(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 646 pdev->pd_saved_state); 647 } 648 649 void 650 pci_restore_state(struct pci_dev *pdev) 651 { 652 653 KASSERT(pdev->pd_saved_state != NULL); 654 pci_conf_restore(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 655 pdev->pd_saved_state); 656 kmem_free(pdev->pd_saved_state, sizeof(*pdev->pd_saved_state)); 657 pdev->pd_saved_state = NULL; 658 } 659 660 bool 661 pci_is_pcie(struct pci_dev *pdev) 662 { 663 664 return (pci_find_capability(pdev, PCI_CAP_PCIEXPRESS) != 0); 665 } 666 667 bool 668 pci_dma_supported(struct pci_dev *pdev, uintmax_t mask) 669 { 670 671 /* XXX Cop-out. */ 672 if (mask > DMA_BIT_MASK(32)) 673 return pci_dma64_available(&pdev->pd_pa); 674 else 675 return true; 676 } 677 678 bool 679 pci_is_root_bus(struct pci_bus *bus) 680 { 681 682 /* XXX Cop-out. */ 683 return false; 684 } 685 686 int 687 pci_domain_nr(struct pci_bus *bus) 688 { 689 690 return device_unit(bus->pb_dev); 691 } 692 693 /* 694 * We explicitly rename pci_enable/disable_device so that you have to 695 * review each use of them, since NetBSD's PCI API does _not_ respect 696 * our local enablecnt here, but there are different parts of NetBSD 697 * that automatically enable/disable like PMF, so you have to decide 698 * for each one whether to call it or not. 699 */ 700 701 int 702 linux_pci_enable_device(struct pci_dev *pdev) 703 { 704 const struct pci_attach_args *pa = &pdev->pd_pa; 705 pcireg_t csr; 706 int s; 707 708 if (pdev->pd_enablecnt++) 709 return 0; 710 711 s = splhigh(); 712 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 713 /* If someone else (firmware) already enabled it, credit them. */ 714 if (csr & (PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE)) 715 pdev->pd_enablecnt++; 716 csr |= PCI_COMMAND_IO_ENABLE; 717 csr |= PCI_COMMAND_MEM_ENABLE; 718 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 719 splx(s); 720 721 return 0; 722 } 723 724 void 725 linux_pci_disable_device(struct pci_dev *pdev) 726 { 727 const struct pci_attach_args *pa = &pdev->pd_pa; 728 pcireg_t csr; 729 int s; 730 731 if (--pdev->pd_enablecnt) 732 return; 733 734 s = splhigh(); 735 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 736 csr &= ~PCI_COMMAND_IO_ENABLE; 737 csr &= ~PCI_COMMAND_MEM_ENABLE; 738 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 739 splx(s); 740 } 741 742 void 743 linux_pci_dev_destroy(struct pci_dev *pdev) 744 { 745 unsigned i; 746 747 if (pdev->bus != NULL) { 748 kmem_free(pdev->bus, sizeof(*pdev->bus)); 749 pdev->bus = NULL; 750 } 751 if (ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)) { 752 pci_unmap_rom(pdev, pdev->pd_rom_vaddr); 753 pdev->pd_rom_vaddr = 0; 754 } 755 for (i = 0; i < __arraycount(pdev->pd_resources); i++) { 756 if (!pdev->pd_resources[i].mapped) 757 continue; 758 bus_space_unmap(pdev->pd_resources[i].bst, 759 pdev->pd_resources[i].bsh, pdev->pd_resources[i].size); 760 } 761 762 /* There is no way these should be still in use. */ 763 KASSERT(pdev->pd_saved_state == NULL); 764 KASSERT(pdev->pd_intr_handles == NULL); 765 } 766