1 /* $NetBSD: linux_pci.c,v 1.8 2020/02/03 16:22:52 jmcneill 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 #ifdef _KERNEL_OPT 33 #include "opt_pci.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: linux_pci.c,v 1.8 2020/02/03 16:22:52 jmcneill Exp $"); 38 39 #include <linux/pci.h> 40 41 #include <drm/drm_agp_netbsd.h> 42 43 device_t 44 pci_dev_dev(struct pci_dev *pdev) 45 { 46 47 return pdev->pd_dev; 48 } 49 50 /* XXX Nouveau kludge! */ 51 struct drm_device * 52 pci_get_drvdata(struct pci_dev *pdev) 53 { 54 55 return pdev->pd_drm_dev; 56 } 57 58 void 59 linux_pci_dev_init(struct pci_dev *pdev, device_t dev, device_t parent, 60 const struct pci_attach_args *pa, int kludges) 61 { 62 const uint32_t subsystem_id = pci_conf_read(pa->pa_pc, pa->pa_tag, 63 PCI_SUBSYS_ID_REG); 64 unsigned i; 65 66 memset(pdev, 0, sizeof(*pdev)); /* paranoia */ 67 68 pdev->pd_pa = *pa; 69 pdev->pd_kludges = kludges; 70 pdev->pd_rom_vaddr = NULL; 71 pdev->pd_dev = dev; 72 #if (NACPICA > 0) 73 #ifdef __HAVE_PCI_GET_SEGMENT 74 const int seg = pci_get_segment(pa->pa_pc); 75 #else 76 const int seg = 0; 77 #endif 78 pdev->pd_ad = acpi_pcidev_find(seg, pa->pa_bus, 79 pa->pa_device, pa->pa_function); 80 #else 81 pdev->pd_ad = NULL; 82 #endif 83 pdev->pd_saved_state = NULL; 84 pdev->pd_intr_handles = NULL; 85 pdev->bus = kmem_zalloc(sizeof(*pdev->bus), KM_NOSLEEP); 86 pdev->bus->pb_pc = pa->pa_pc; 87 pdev->bus->pb_dev = parent; 88 pdev->bus->number = pa->pa_bus; 89 pdev->devfn = PCI_DEVFN(pa->pa_device, pa->pa_function); 90 pdev->vendor = PCI_VENDOR(pa->pa_id); 91 pdev->device = PCI_PRODUCT(pa->pa_id); 92 pdev->subsystem_vendor = PCI_SUBSYS_VENDOR(subsystem_id); 93 pdev->subsystem_device = PCI_SUBSYS_ID(subsystem_id); 94 pdev->revision = PCI_REVISION(pa->pa_class); 95 pdev->class = __SHIFTOUT(pa->pa_class, 0xffffff00UL); /* ? */ 96 97 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 98 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 99 const int reg = PCI_BAR(i); 100 101 pdev->pd_resources[i].type = pci_mapreg_type(pa->pa_pc, 102 pa->pa_tag, reg); 103 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 104 pdev->pd_resources[i].type, 105 &pdev->pd_resources[i].addr, 106 &pdev->pd_resources[i].size, 107 &pdev->pd_resources[i].flags)) { 108 pdev->pd_resources[i].addr = 0; 109 pdev->pd_resources[i].size = 0; 110 pdev->pd_resources[i].flags = 0; 111 } 112 pdev->pd_resources[i].kva = NULL; 113 pdev->pd_resources[i].mapped = false; 114 } 115 } 116 117 int 118 pci_find_capability(struct pci_dev *pdev, int cap) 119 { 120 121 return pci_get_capability(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, cap, 122 NULL, NULL); 123 } 124 125 int 126 pci_read_config_dword(struct pci_dev *pdev, int reg, uint32_t *valuep) 127 { 128 129 KASSERT(!ISSET(reg, 3)); 130 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg); 131 return 0; 132 } 133 134 int 135 pci_read_config_word(struct pci_dev *pdev, int reg, uint16_t *valuep) 136 { 137 138 KASSERT(!ISSET(reg, 1)); 139 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 140 (reg &~ 2)) >> (8 * (reg & 2)); 141 return 0; 142 } 143 144 int 145 pci_read_config_byte(struct pci_dev *pdev, int reg, uint8_t *valuep) 146 { 147 148 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 149 (reg &~ 3)) >> (8 * (reg & 3)); 150 return 0; 151 } 152 153 int 154 pci_write_config_dword(struct pci_dev *pdev, int reg, uint32_t value) 155 { 156 157 KASSERT(!ISSET(reg, 3)); 158 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, value); 159 return 0; 160 } 161 162 int 163 pci_bus_read_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 164 uint32_t *valuep) 165 { 166 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 167 PCI_FUNC(devfn)); 168 169 KASSERT(!ISSET(reg, 1)); 170 *valuep = pci_conf_read(bus->pb_pc, tag, reg & ~3) >> (8 * (reg & 3)); 171 return 0; 172 } 173 174 int 175 pci_bus_read_config_word(struct pci_bus *bus, unsigned devfn, int reg, 176 uint16_t *valuep) 177 { 178 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 179 PCI_FUNC(devfn)); 180 181 KASSERT(!ISSET(reg, 1)); 182 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 2) >> (8 * (reg & 2)); 183 return 0; 184 } 185 186 int 187 pci_bus_read_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 188 uint8_t *valuep) 189 { 190 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 191 PCI_FUNC(devfn)); 192 193 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 3) >> (8 * (reg & 3)); 194 return 0; 195 } 196 197 int 198 pci_bus_write_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 199 uint32_t value) 200 { 201 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 202 PCI_FUNC(devfn)); 203 204 KASSERT(!ISSET(reg, 3)); 205 pci_conf_write(bus->pb_pc, tag, reg, value); 206 return 0; 207 } 208 209 static void 210 pci_rmw_config(pci_chipset_tag_t pc, pcitag_t tag, int reg, unsigned int bytes, 211 uint32_t value) 212 { 213 const uint32_t mask = ~((~0UL) << (8 * bytes)); 214 const int reg32 = (reg &~ 3); 215 const unsigned int shift = (8 * (reg & 3)); 216 uint32_t value32; 217 218 KASSERT(bytes <= 4); 219 KASSERT(!ISSET(value, ~mask)); 220 value32 = pci_conf_read(pc, tag, reg32); 221 value32 &=~ (mask << shift); 222 value32 |= (value << shift); 223 pci_conf_write(pc, tag, reg32, value32); 224 } 225 226 int 227 pci_write_config_word(struct pci_dev *pdev, int reg, uint16_t value) 228 { 229 230 KASSERT(!ISSET(reg, 1)); 231 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 2, value); 232 return 0; 233 } 234 235 int 236 pci_write_config_byte(struct pci_dev *pdev, int reg, uint8_t value) 237 { 238 239 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 1, value); 240 return 0; 241 } 242 243 int 244 pci_bus_write_config_word(struct pci_bus *bus, unsigned devfn, int reg, 245 uint16_t value) 246 { 247 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 248 PCI_FUNC(devfn)); 249 250 KASSERT(!ISSET(reg, 1)); 251 pci_rmw_config(bus->pb_pc, tag, reg, 2, value); 252 return 0; 253 } 254 255 int 256 pci_bus_write_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 257 uint8_t value) 258 { 259 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 260 PCI_FUNC(devfn)); 261 262 pci_rmw_config(bus->pb_pc, tag, reg, 1, value); 263 return 0; 264 } 265 266 int 267 pci_enable_msi(struct pci_dev *pdev) 268 { 269 const struct pci_attach_args *const pa = &pdev->pd_pa; 270 271 if (pci_msi_alloc_exact(pa, &pdev->pd_intr_handles, 1)) 272 return -EINVAL; 273 274 pdev->msi_enabled = 1; 275 return 0; 276 } 277 278 void 279 pci_disable_msi(struct pci_dev *pdev __unused) 280 { 281 const struct pci_attach_args *const pa = &pdev->pd_pa; 282 283 if (pdev->pd_intr_handles != NULL) { 284 pci_intr_release(pa->pa_pc, pdev->pd_intr_handles, 1); 285 pdev->pd_intr_handles = NULL; 286 } 287 pdev->msi_enabled = 0; 288 } 289 290 void 291 pci_set_master(struct pci_dev *pdev) 292 { 293 pcireg_t csr; 294 295 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 296 PCI_COMMAND_STATUS_REG); 297 csr |= PCI_COMMAND_MASTER_ENABLE; 298 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 299 PCI_COMMAND_STATUS_REG, csr); 300 } 301 302 void 303 pci_clear_master(struct pci_dev *pdev) 304 { 305 pcireg_t csr; 306 307 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 308 PCI_COMMAND_STATUS_REG); 309 csr &= ~(pcireg_t)PCI_COMMAND_MASTER_ENABLE; 310 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 311 PCI_COMMAND_STATUS_REG, csr); 312 } 313 314 bus_addr_t 315 pcibios_align_resource(void *p, const struct resource *resource, 316 bus_addr_t addr, bus_size_t size) 317 { 318 panic("pcibios_align_resource has accessed unaligned neurons!"); 319 } 320 321 int 322 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *resource, 323 bus_size_t size, bus_size_t align, bus_addr_t start, int type __unused, 324 bus_addr_t (*align_fn)(void *, const struct resource *, bus_addr_t, 325 bus_size_t) __unused, 326 struct pci_dev *pdev) 327 { 328 const struct pci_attach_args *const pa = &pdev->pd_pa; 329 bus_space_tag_t bst; 330 int error; 331 332 switch (resource->flags) { 333 case IORESOURCE_MEM: 334 bst = pa->pa_memt; 335 break; 336 337 case IORESOURCE_IO: 338 bst = pa->pa_iot; 339 break; 340 341 default: 342 panic("I don't know what kind of resource you want!"); 343 } 344 345 resource->r_bst = bst; 346 error = bus_space_alloc(bst, start, __type_max(bus_addr_t), 347 size, align, 0, 0, &resource->start, &resource->r_bsh); 348 if (error) 349 return error; 350 351 resource->size = size; 352 return 0; 353 } 354 355 /* 356 * XXX Mega-kludgerific! pci_get_bus_and_slot and pci_get_class are 357 * defined only for their single purposes in i915drm, in 358 * i915_get_bridge_dev and intel_detect_pch. We can't define them more 359 * generally without adapting pci_find_device (and pci_enumerate_bus 360 * internally) to pass a cookie through. 361 */ 362 363 static int 364 pci_kludgey_match_bus0_dev0_func0(const struct pci_attach_args *pa) 365 { 366 367 if (pa->pa_bus != 0) 368 return 0; 369 if (pa->pa_device != 0) 370 return 0; 371 if (pa->pa_function != 0) 372 return 0; 373 374 return 1; 375 } 376 377 struct pci_dev * 378 pci_get_bus_and_slot(int bus, int slot) 379 { 380 struct pci_attach_args pa; 381 382 KASSERT(bus == 0); 383 KASSERT(slot == PCI_DEVFN(0, 0)); 384 385 if (!pci_find_device(&pa, &pci_kludgey_match_bus0_dev0_func0)) 386 return NULL; 387 388 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 389 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 390 391 return pdev; 392 } 393 394 static int 395 pci_kludgey_match_isa_bridge(const struct pci_attach_args *pa) 396 { 397 398 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 399 return 0; 400 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_BRIDGE_ISA) 401 return 0; 402 403 return 1; 404 } 405 406 void 407 pci_dev_put(struct pci_dev *pdev) 408 { 409 410 if (pdev == NULL) 411 return; 412 413 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_GET_MUMBLE)); 414 kmem_free(pdev->bus, sizeof(*pdev->bus)); 415 kmem_free(pdev, sizeof(*pdev)); 416 } 417 418 struct pci_dev * /* XXX i915 kludge */ 419 pci_get_class(uint32_t class_subclass_shifted __unused, struct pci_dev *from) 420 { 421 struct pci_attach_args pa; 422 423 KASSERT(class_subclass_shifted == (PCI_CLASS_BRIDGE_ISA << 8)); 424 425 if (from != NULL) { 426 pci_dev_put(from); 427 return NULL; 428 } 429 430 if (!pci_find_device(&pa, &pci_kludgey_match_isa_bridge)) 431 return NULL; 432 433 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 434 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 435 436 return pdev; 437 } 438 439 void 440 pci_unmap_rom(struct pci_dev *pdev, void __pci_rom_iomem *vaddr __unused) 441 { 442 443 /* XXX Disable the ROM address decoder. */ 444 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 445 KASSERT(vaddr == pdev->pd_rom_vaddr); 446 bus_space_unmap(pdev->pd_rom_bst, pdev->pd_rom_bsh, pdev->pd_rom_size); 447 pdev->pd_kludges &= ~NBPCI_KLUDGE_MAP_ROM; 448 pdev->pd_rom_vaddr = NULL; 449 } 450 451 /* XXX Whattakludge! Should move this in sys/arch/. */ 452 static int 453 pci_map_rom_md(struct pci_dev *pdev) 454 { 455 #if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) 456 const bus_addr_t rom_base = 0xc0000; 457 const bus_size_t rom_size = 0x20000; 458 bus_space_handle_t rom_bsh; 459 int error; 460 461 if (PCI_CLASS(pdev->pd_pa.pa_class) != PCI_CLASS_DISPLAY) 462 return ENXIO; 463 if (PCI_SUBCLASS(pdev->pd_pa.pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 464 return ENXIO; 465 /* XXX Check whether this is the primary VGA card? */ 466 error = bus_space_map(pdev->pd_pa.pa_memt, rom_base, rom_size, 467 (BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE), &rom_bsh); 468 if (error) 469 return ENXIO; 470 471 pdev->pd_rom_bst = pdev->pd_pa.pa_memt; 472 pdev->pd_rom_bsh = rom_bsh; 473 pdev->pd_rom_size = rom_size; 474 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 475 476 return 0; 477 #else 478 return ENXIO; 479 #endif 480 } 481 482 void __pci_rom_iomem * 483 pci_map_rom(struct pci_dev *pdev, size_t *sizep) 484 { 485 486 KASSERT(!ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 487 488 if (pci_mapreg_map(&pdev->pd_pa, PCI_MAPREG_ROM, PCI_MAPREG_TYPE_ROM, 489 (BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR), 490 &pdev->pd_rom_bst, &pdev->pd_rom_bsh, NULL, &pdev->pd_rom_size) 491 != 0) 492 goto fail_mi; 493 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 494 495 /* XXX This type is obviously wrong in general... */ 496 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 497 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 498 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 499 pci_unmap_rom(pdev, NULL); 500 goto fail_mi; 501 } 502 goto success; 503 504 fail_mi: 505 if (pci_map_rom_md(pdev) != 0) 506 goto fail_md; 507 508 /* XXX This type is obviously wrong in general... */ 509 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 510 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 511 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 512 pci_unmap_rom(pdev, NULL); 513 goto fail_md; 514 } 515 516 success: 517 KASSERT(pdev->pd_rom_found_size <= SIZE_T_MAX); 518 *sizep = pdev->pd_rom_found_size; 519 pdev->pd_rom_vaddr = bus_space_vaddr(pdev->pd_rom_bst, 520 pdev->pd_rom_found_bsh); 521 return pdev->pd_rom_vaddr; 522 523 fail_md: 524 return NULL; 525 } 526 527 void __pci_rom_iomem * 528 pci_platform_rom(struct pci_dev *pdev __unused, size_t *sizep) 529 { 530 531 *sizep = 0; 532 return NULL; 533 } 534 535 int 536 pci_enable_rom(struct pci_dev *pdev) 537 { 538 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 539 const pcitag_t tag = pdev->pd_pa.pa_tag; 540 pcireg_t addr; 541 int s; 542 543 /* XXX Don't do anything if the ROM isn't there. */ 544 545 s = splhigh(); 546 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 547 addr |= PCI_MAPREG_ROM_ENABLE; 548 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 549 splx(s); 550 551 return 0; 552 } 553 554 void 555 pci_disable_rom(struct pci_dev *pdev) 556 { 557 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 558 const pcitag_t tag = pdev->pd_pa.pa_tag; 559 pcireg_t addr; 560 int s; 561 562 s = splhigh(); 563 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 564 addr &= ~(pcireg_t)PCI_MAPREG_ROM_ENABLE; 565 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 566 splx(s); 567 } 568 569 bus_addr_t 570 pci_resource_start(struct pci_dev *pdev, unsigned i) 571 { 572 573 KASSERT(i < PCI_NUM_RESOURCES); 574 return pdev->pd_resources[i].addr; 575 } 576 577 bus_size_t 578 pci_resource_len(struct pci_dev *pdev, unsigned i) 579 { 580 581 KASSERT(i < PCI_NUM_RESOURCES); 582 return pdev->pd_resources[i].size; 583 } 584 585 bus_addr_t 586 pci_resource_end(struct pci_dev *pdev, unsigned i) 587 { 588 589 return pci_resource_start(pdev, i) + (pci_resource_len(pdev, i) - 1); 590 } 591 592 int 593 pci_resource_flags(struct pci_dev *pdev, unsigned i) 594 { 595 596 KASSERT(i < PCI_NUM_RESOURCES); 597 return pdev->pd_resources[i].flags; 598 } 599 600 void __pci_iomem * 601 pci_iomap(struct pci_dev *pdev, unsigned i, bus_size_t size) 602 { 603 int error; 604 605 KASSERT(i < PCI_NUM_RESOURCES); 606 KASSERT(pdev->pd_resources[i].kva == NULL); 607 608 if (PCI_MAPREG_TYPE(pdev->pd_resources[i].type) != PCI_MAPREG_TYPE_MEM) 609 return NULL; 610 if (pdev->pd_resources[i].size < size) 611 return NULL; 612 error = bus_space_map(pdev->pd_pa.pa_memt, pdev->pd_resources[i].addr, 613 size, BUS_SPACE_MAP_LINEAR | pdev->pd_resources[i].flags, 614 &pdev->pd_resources[i].bsh); 615 if (error) 616 return NULL; 617 /* XXX Synchronize with drm_agp_borrow_hook in drm_agpsupport.c. */ 618 pdev->pd_resources[i].bst = pdev->pd_pa.pa_memt; 619 pdev->pd_resources[i].kva = bus_space_vaddr(pdev->pd_resources[i].bst, 620 pdev->pd_resources[i].bsh); 621 pdev->pd_resources[i].mapped = true; 622 623 return pdev->pd_resources[i].kva; 624 } 625 626 void 627 pci_iounmap(struct pci_dev *pdev, void __pci_iomem *kva) 628 { 629 unsigned i; 630 631 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 632 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 633 if (pdev->pd_resources[i].kva == kva) 634 break; 635 } 636 KASSERT(i < PCI_NUM_RESOURCES); 637 638 pdev->pd_resources[i].kva = NULL; 639 bus_space_unmap(pdev->pd_resources[i].bst, pdev->pd_resources[i].bsh, 640 pdev->pd_resources[i].size); 641 } 642 643 void 644 pci_save_state(struct pci_dev *pdev) 645 { 646 647 KASSERT(pdev->pd_saved_state == NULL); 648 pdev->pd_saved_state = kmem_alloc(sizeof(*pdev->pd_saved_state), 649 KM_SLEEP); 650 pci_conf_capture(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 651 pdev->pd_saved_state); 652 } 653 654 void 655 pci_restore_state(struct pci_dev *pdev) 656 { 657 658 KASSERT(pdev->pd_saved_state != NULL); 659 pci_conf_restore(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 660 pdev->pd_saved_state); 661 kmem_free(pdev->pd_saved_state, sizeof(*pdev->pd_saved_state)); 662 pdev->pd_saved_state = NULL; 663 } 664 665 bool 666 pci_is_pcie(struct pci_dev *pdev) 667 { 668 669 return (pci_find_capability(pdev, PCI_CAP_PCIEXPRESS) != 0); 670 } 671 672 bool 673 pci_dma_supported(struct pci_dev *pdev, uintmax_t mask) 674 { 675 676 /* XXX Cop-out. */ 677 if (mask > DMA_BIT_MASK(32)) 678 return pci_dma64_available(&pdev->pd_pa); 679 else 680 return true; 681 } 682 683 bool 684 pci_is_root_bus(struct pci_bus *bus) 685 { 686 687 /* XXX Cop-out. */ 688 return false; 689 } 690 691 int 692 pci_domain_nr(struct pci_bus *bus) 693 { 694 695 return device_unit(bus->pb_dev); 696 } 697 698 /* 699 * We explicitly rename pci_enable/disable_device so that you have to 700 * review each use of them, since NetBSD's PCI API does _not_ respect 701 * our local enablecnt here, but there are different parts of NetBSD 702 * that automatically enable/disable like PMF, so you have to decide 703 * for each one whether to call it or not. 704 */ 705 706 int 707 linux_pci_enable_device(struct pci_dev *pdev) 708 { 709 const struct pci_attach_args *pa = &pdev->pd_pa; 710 pcireg_t csr; 711 int s; 712 713 if (pdev->pd_enablecnt++) 714 return 0; 715 716 s = splhigh(); 717 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 718 /* If someone else (firmware) already enabled it, credit them. */ 719 if (csr & (PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE)) 720 pdev->pd_enablecnt++; 721 csr |= PCI_COMMAND_IO_ENABLE; 722 csr |= PCI_COMMAND_MEM_ENABLE; 723 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 724 splx(s); 725 726 return 0; 727 } 728 729 void 730 linux_pci_disable_device(struct pci_dev *pdev) 731 { 732 const struct pci_attach_args *pa = &pdev->pd_pa; 733 pcireg_t csr; 734 int s; 735 736 if (--pdev->pd_enablecnt) 737 return; 738 739 s = splhigh(); 740 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 741 csr &= ~PCI_COMMAND_IO_ENABLE; 742 csr &= ~PCI_COMMAND_MEM_ENABLE; 743 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 744 splx(s); 745 } 746 747 void 748 linux_pci_dev_destroy(struct pci_dev *pdev) 749 { 750 unsigned i; 751 752 if (pdev->bus != NULL) { 753 kmem_free(pdev->bus, sizeof(*pdev->bus)); 754 pdev->bus = NULL; 755 } 756 if (ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)) { 757 pci_unmap_rom(pdev, pdev->pd_rom_vaddr); 758 pdev->pd_rom_vaddr = 0; 759 } 760 for (i = 0; i < __arraycount(pdev->pd_resources); i++) { 761 if (!pdev->pd_resources[i].mapped) 762 continue; 763 bus_space_unmap(pdev->pd_resources[i].bst, 764 pdev->pd_resources[i].bsh, pdev->pd_resources[i].size); 765 } 766 767 /* There is no way these should be still in use. */ 768 KASSERT(pdev->pd_saved_state == NULL); 769 KASSERT(pdev->pd_intr_handles == NULL); 770 } 771