linux_pci.c revision 1.15
1 /* $NetBSD: linux_pci.c,v 1.15 2021/12/19 09:49:39 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 #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 1.15 2021/12/19 09:49:39 riastradh 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 void 51 pci_set_drvdata(struct pci_dev *pdev, void *drvdata) 52 { 53 pdev->pd_drvdata = drvdata; 54 } 55 56 void * 57 pci_get_drvdata(struct pci_dev *pdev) 58 { 59 return pdev->pd_drvdata; 60 } 61 62 void 63 linux_pci_dev_init(struct pci_dev *pdev, device_t dev, device_t parent, 64 const struct pci_attach_args *pa, int kludges) 65 { 66 const uint32_t subsystem_id = pci_conf_read(pa->pa_pc, pa->pa_tag, 67 PCI_SUBSYS_ID_REG); 68 unsigned i; 69 70 memset(pdev, 0, sizeof(*pdev)); /* paranoia */ 71 72 pdev->pd_pa = *pa; 73 pdev->pd_kludges = kludges; 74 pdev->pd_rom_vaddr = NULL; 75 pdev->pd_dev = dev; 76 #if (NACPICA > 0) 77 #ifdef __HAVE_PCI_GET_SEGMENT 78 const int seg = pci_get_segment(pa->pa_pc); 79 #else 80 const int seg = 0; 81 #endif 82 pdev->pd_ad = acpi_pcidev_find(seg, pa->pa_bus, 83 pa->pa_device, pa->pa_function); 84 #else 85 pdev->pd_ad = NULL; 86 #endif 87 pdev->pd_saved_state = NULL; 88 pdev->pd_intr_handles = NULL; 89 pdev->pd_drvdata = NULL; 90 pdev->bus = kmem_zalloc(sizeof(*pdev->bus), KM_NOSLEEP); 91 pdev->bus->pb_pc = pa->pa_pc; 92 pdev->bus->pb_dev = parent; 93 pdev->bus->number = pa->pa_bus; 94 pdev->devfn = PCI_DEVFN(pa->pa_device, pa->pa_function); 95 pdev->vendor = PCI_VENDOR(pa->pa_id); 96 pdev->device = PCI_PRODUCT(pa->pa_id); 97 pdev->subsystem_vendor = PCI_SUBSYS_VENDOR(subsystem_id); 98 pdev->subsystem_device = PCI_SUBSYS_ID(subsystem_id); 99 pdev->revision = PCI_REVISION(pa->pa_class); 100 pdev->class = __SHIFTOUT(pa->pa_class, 0xffffff00UL); /* ? */ 101 102 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 103 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 104 const int reg = PCI_BAR(i); 105 106 pdev->pd_resources[i].type = pci_mapreg_type(pa->pa_pc, 107 pa->pa_tag, reg); 108 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 109 pdev->pd_resources[i].type, 110 &pdev->pd_resources[i].addr, 111 &pdev->pd_resources[i].size, 112 &pdev->pd_resources[i].flags)) { 113 pdev->pd_resources[i].addr = 0; 114 pdev->pd_resources[i].size = 0; 115 pdev->pd_resources[i].flags = 0; 116 } 117 pdev->pd_resources[i].kva = NULL; 118 pdev->pd_resources[i].mapped = false; 119 } 120 } 121 122 int 123 pci_find_capability(struct pci_dev *pdev, int cap) 124 { 125 126 return pci_get_capability(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, cap, 127 NULL, NULL); 128 } 129 130 int 131 pci_read_config_dword(struct pci_dev *pdev, int reg, uint32_t *valuep) 132 { 133 134 KASSERT(!ISSET(reg, 3)); 135 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg); 136 return 0; 137 } 138 139 int 140 pci_read_config_word(struct pci_dev *pdev, int reg, uint16_t *valuep) 141 { 142 143 KASSERT(!ISSET(reg, 1)); 144 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 145 (reg &~ 2)) >> (8 * (reg & 2)); 146 return 0; 147 } 148 149 int 150 pci_read_config_byte(struct pci_dev *pdev, int reg, uint8_t *valuep) 151 { 152 153 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 154 (reg &~ 3)) >> (8 * (reg & 3)); 155 return 0; 156 } 157 158 int 159 pci_write_config_dword(struct pci_dev *pdev, int reg, uint32_t value) 160 { 161 162 KASSERT(!ISSET(reg, 3)); 163 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, value); 164 return 0; 165 } 166 167 int 168 pci_bus_read_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 169 uint32_t *valuep) 170 { 171 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 172 PCI_FUNC(devfn)); 173 174 KASSERT(!ISSET(reg, 1)); 175 *valuep = pci_conf_read(bus->pb_pc, tag, reg & ~3) >> (8 * (reg & 3)); 176 return 0; 177 } 178 179 int 180 pci_bus_read_config_word(struct pci_bus *bus, unsigned devfn, int reg, 181 uint16_t *valuep) 182 { 183 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 184 PCI_FUNC(devfn)); 185 186 KASSERT(!ISSET(reg, 1)); 187 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 2) >> (8 * (reg & 2)); 188 return 0; 189 } 190 191 int 192 pci_bus_read_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 193 uint8_t *valuep) 194 { 195 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 196 PCI_FUNC(devfn)); 197 198 *valuep = pci_conf_read(bus->pb_pc, tag, reg &~ 3) >> (8 * (reg & 3)); 199 return 0; 200 } 201 202 int 203 pci_bus_write_config_dword(struct pci_bus *bus, unsigned devfn, int reg, 204 uint32_t value) 205 { 206 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 207 PCI_FUNC(devfn)); 208 209 KASSERT(!ISSET(reg, 3)); 210 pci_conf_write(bus->pb_pc, tag, reg, value); 211 return 0; 212 } 213 214 static void 215 pci_rmw_config(pci_chipset_tag_t pc, pcitag_t tag, int reg, unsigned int bytes, 216 uint32_t value) 217 { 218 const uint32_t mask = ~((~0UL) << (8 * bytes)); 219 const int reg32 = (reg &~ 3); 220 const unsigned int shift = (8 * (reg & 3)); 221 uint32_t value32; 222 223 KASSERT(bytes <= 4); 224 KASSERT(!ISSET(value, ~mask)); 225 value32 = pci_conf_read(pc, tag, reg32); 226 value32 &=~ (mask << shift); 227 value32 |= (value << shift); 228 pci_conf_write(pc, tag, reg32, value32); 229 } 230 231 int 232 pci_write_config_word(struct pci_dev *pdev, int reg, uint16_t value) 233 { 234 235 KASSERT(!ISSET(reg, 1)); 236 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 2, value); 237 return 0; 238 } 239 240 int 241 pci_write_config_byte(struct pci_dev *pdev, int reg, uint8_t value) 242 { 243 244 pci_rmw_config(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, 1, value); 245 return 0; 246 } 247 248 int 249 pci_bus_write_config_word(struct pci_bus *bus, unsigned devfn, int reg, 250 uint16_t value) 251 { 252 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 253 PCI_FUNC(devfn)); 254 255 KASSERT(!ISSET(reg, 1)); 256 pci_rmw_config(bus->pb_pc, tag, reg, 2, value); 257 return 0; 258 } 259 260 int 261 pci_bus_write_config_byte(struct pci_bus *bus, unsigned devfn, int reg, 262 uint8_t value) 263 { 264 pcitag_t tag = pci_make_tag(bus->pb_pc, bus->number, PCI_SLOT(devfn), 265 PCI_FUNC(devfn)); 266 267 pci_rmw_config(bus->pb_pc, tag, reg, 1, value); 268 return 0; 269 } 270 271 int 272 pci_enable_msi(struct pci_dev *pdev) 273 { 274 const struct pci_attach_args *const pa = &pdev->pd_pa; 275 276 if (pci_msi_alloc_exact(pa, &pdev->pd_intr_handles, 1)) 277 return -EINVAL; 278 279 pdev->msi_enabled = 1; 280 return 0; 281 } 282 283 void 284 pci_disable_msi(struct pci_dev *pdev __unused) 285 { 286 const struct pci_attach_args *const pa = &pdev->pd_pa; 287 288 if (pdev->pd_intr_handles != NULL) { 289 pci_intr_release(pa->pa_pc, pdev->pd_intr_handles, 1); 290 pdev->pd_intr_handles = NULL; 291 } 292 pdev->msi_enabled = 0; 293 } 294 295 void 296 pci_set_master(struct pci_dev *pdev) 297 { 298 pcireg_t csr; 299 300 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 301 PCI_COMMAND_STATUS_REG); 302 csr |= PCI_COMMAND_MASTER_ENABLE; 303 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 304 PCI_COMMAND_STATUS_REG, csr); 305 } 306 307 void 308 pci_clear_master(struct pci_dev *pdev) 309 { 310 pcireg_t csr; 311 312 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 313 PCI_COMMAND_STATUS_REG); 314 csr &= ~(pcireg_t)PCI_COMMAND_MASTER_ENABLE; 315 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 316 PCI_COMMAND_STATUS_REG, csr); 317 } 318 319 bus_addr_t 320 pcibios_align_resource(void *p, const struct resource *resource, 321 bus_addr_t addr, bus_size_t size) 322 { 323 panic("pcibios_align_resource has accessed unaligned neurons!"); 324 } 325 326 int 327 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *resource, 328 bus_size_t size, bus_size_t align, bus_addr_t start, int type __unused, 329 bus_addr_t (*align_fn)(void *, const struct resource *, bus_addr_t, 330 bus_size_t) __unused, 331 struct pci_dev *pdev) 332 { 333 const struct pci_attach_args *const pa = &pdev->pd_pa; 334 bus_space_tag_t bst; 335 int error; 336 337 switch (resource->flags) { 338 case IORESOURCE_MEM: 339 bst = pa->pa_memt; 340 break; 341 342 case IORESOURCE_IO: 343 bst = pa->pa_iot; 344 break; 345 346 default: 347 panic("I don't know what kind of resource you want!"); 348 } 349 350 resource->r_bst = bst; 351 error = bus_space_alloc(bst, start, __type_max(bus_addr_t), 352 size, align, 0, 0, &resource->start, &resource->r_bsh); 353 if (error) 354 return error; 355 356 resource->end = start + (size - 1); 357 return 0; 358 } 359 360 /* 361 * XXX Mega-kludgerific! pci_get_bus_and_slot and pci_get_class are 362 * defined only for their single purposes in i915drm, in 363 * i915_get_bridge_dev and intel_detect_pch. We can't define them more 364 * generally without adapting pci_find_device (and pci_enumerate_bus 365 * internally) to pass a cookie through. 366 */ 367 368 static int 369 pci_kludgey_match_bus0_dev0_func0(const struct pci_attach_args *pa) 370 { 371 372 /* XXX domain */ 373 if (pa->pa_bus != 0) 374 return 0; 375 if (pa->pa_device != 0) 376 return 0; 377 if (pa->pa_function != 0) 378 return 0; 379 380 return 1; 381 } 382 383 struct pci_dev * 384 pci_get_domain_bus_and_slot(int domain, int bus, int slot) 385 { 386 struct pci_attach_args pa; 387 388 KASSERT(domain == 0); 389 KASSERT(bus == 0); 390 KASSERT(slot == PCI_DEVFN(0, 0)); 391 392 if (!pci_find_device(&pa, &pci_kludgey_match_bus0_dev0_func0)) 393 return NULL; 394 395 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 396 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 397 398 return pdev; 399 } 400 401 static int 402 pci_kludgey_match_isa_bridge(const struct pci_attach_args *pa) 403 { 404 405 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 406 return 0; 407 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_BRIDGE_ISA) 408 return 0; 409 410 return 1; 411 } 412 413 void 414 pci_dev_put(struct pci_dev *pdev) 415 { 416 417 if (pdev == NULL) 418 return; 419 420 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_GET_MUMBLE)); 421 kmem_free(pdev->bus, sizeof(*pdev->bus)); 422 kmem_free(pdev, sizeof(*pdev)); 423 } 424 425 struct pci_dev * /* XXX i915 kludge */ 426 pci_get_class(uint32_t class_subclass_shifted __unused, struct pci_dev *from) 427 { 428 struct pci_attach_args pa; 429 430 KASSERT(class_subclass_shifted == (PCI_CLASS_BRIDGE_ISA << 8)); 431 432 if (from != NULL) { 433 pci_dev_put(from); 434 return NULL; 435 } 436 437 if (!pci_find_device(&pa, &pci_kludgey_match_isa_bridge)) 438 return NULL; 439 440 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 441 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 442 443 return pdev; 444 } 445 446 void 447 pci_unmap_rom(struct pci_dev *pdev, void __pci_rom_iomem *vaddr __unused) 448 { 449 450 /* XXX Disable the ROM address decoder. */ 451 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 452 KASSERT(vaddr == pdev->pd_rom_vaddr); 453 bus_space_unmap(pdev->pd_rom_bst, pdev->pd_rom_bsh, pdev->pd_rom_size); 454 pdev->pd_kludges &= ~NBPCI_KLUDGE_MAP_ROM; 455 pdev->pd_rom_vaddr = NULL; 456 } 457 458 /* XXX Whattakludge! Should move this in sys/arch/. */ 459 static int 460 pci_map_rom_md(struct pci_dev *pdev) 461 { 462 #if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) 463 const bus_addr_t rom_base = 0xc0000; 464 const bus_size_t rom_size = 0x20000; 465 bus_space_handle_t rom_bsh; 466 int error; 467 468 if (PCI_CLASS(pdev->pd_pa.pa_class) != PCI_CLASS_DISPLAY) 469 return ENXIO; 470 if (PCI_SUBCLASS(pdev->pd_pa.pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 471 return ENXIO; 472 /* XXX Check whether this is the primary VGA card? */ 473 error = bus_space_map(pdev->pd_pa.pa_memt, rom_base, rom_size, 474 (BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE), &rom_bsh); 475 if (error) 476 return ENXIO; 477 478 pdev->pd_rom_bst = pdev->pd_pa.pa_memt; 479 pdev->pd_rom_bsh = rom_bsh; 480 pdev->pd_rom_size = rom_size; 481 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 482 483 return 0; 484 #else 485 return ENXIO; 486 #endif 487 } 488 489 void __pci_rom_iomem * 490 pci_map_rom(struct pci_dev *pdev, size_t *sizep) 491 { 492 493 KASSERT(!ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 494 495 if (pci_mapreg_map(&pdev->pd_pa, PCI_MAPREG_ROM, PCI_MAPREG_TYPE_ROM, 496 (BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR), 497 &pdev->pd_rom_bst, &pdev->pd_rom_bsh, NULL, &pdev->pd_rom_size) 498 != 0) 499 goto fail_mi; 500 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 501 502 /* XXX This type is obviously wrong in general... */ 503 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 504 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 505 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 506 pci_unmap_rom(pdev, NULL); 507 goto fail_mi; 508 } 509 goto success; 510 511 fail_mi: 512 if (pci_map_rom_md(pdev) != 0) 513 goto fail_md; 514 515 /* XXX This type is obviously wrong in general... */ 516 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 517 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 518 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 519 pci_unmap_rom(pdev, NULL); 520 goto fail_md; 521 } 522 523 success: 524 KASSERT(pdev->pd_rom_found_size <= SIZE_T_MAX); 525 *sizep = pdev->pd_rom_found_size; 526 pdev->pd_rom_vaddr = bus_space_vaddr(pdev->pd_rom_bst, 527 pdev->pd_rom_found_bsh); 528 return pdev->pd_rom_vaddr; 529 530 fail_md: 531 return NULL; 532 } 533 534 void __pci_rom_iomem * 535 pci_platform_rom(struct pci_dev *pdev __unused, size_t *sizep) 536 { 537 538 *sizep = 0; 539 return NULL; 540 } 541 542 int 543 pci_enable_rom(struct pci_dev *pdev) 544 { 545 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 546 const pcitag_t tag = pdev->pd_pa.pa_tag; 547 pcireg_t addr; 548 int s; 549 550 /* XXX Don't do anything if the ROM isn't there. */ 551 552 s = splhigh(); 553 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 554 addr |= PCI_MAPREG_ROM_ENABLE; 555 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 556 splx(s); 557 558 return 0; 559 } 560 561 void 562 pci_disable_rom(struct pci_dev *pdev) 563 { 564 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 565 const pcitag_t tag = pdev->pd_pa.pa_tag; 566 pcireg_t addr; 567 int s; 568 569 s = splhigh(); 570 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 571 addr &= ~(pcireg_t)PCI_MAPREG_ROM_ENABLE; 572 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 573 splx(s); 574 } 575 576 bus_addr_t 577 pci_resource_start(struct pci_dev *pdev, unsigned i) 578 { 579 580 KASSERT(i < PCI_NUM_RESOURCES); 581 return pdev->pd_resources[i].addr; 582 } 583 584 bus_size_t 585 pci_resource_len(struct pci_dev *pdev, unsigned i) 586 { 587 588 KASSERT(i < PCI_NUM_RESOURCES); 589 return pdev->pd_resources[i].size; 590 } 591 592 bus_addr_t 593 pci_resource_end(struct pci_dev *pdev, unsigned i) 594 { 595 596 return pci_resource_start(pdev, i) + (pci_resource_len(pdev, i) - 1); 597 } 598 599 int 600 pci_resource_flags(struct pci_dev *pdev, unsigned i) 601 { 602 603 KASSERT(i < PCI_NUM_RESOURCES); 604 return pdev->pd_resources[i].flags; 605 } 606 607 void __pci_iomem * 608 pci_iomap(struct pci_dev *pdev, unsigned i, bus_size_t size) 609 { 610 int error; 611 612 KASSERT(i < PCI_NUM_RESOURCES); 613 KASSERT(pdev->pd_resources[i].kva == NULL); 614 615 if (PCI_MAPREG_TYPE(pdev->pd_resources[i].type) != PCI_MAPREG_TYPE_MEM) 616 return NULL; 617 if (pdev->pd_resources[i].size < size) 618 return NULL; 619 error = bus_space_map(pdev->pd_pa.pa_memt, pdev->pd_resources[i].addr, 620 size, BUS_SPACE_MAP_LINEAR | pdev->pd_resources[i].flags, 621 &pdev->pd_resources[i].bsh); 622 if (error) 623 return NULL; 624 /* XXX Synchronize with drm_agp_borrow_hook in drm_agpsupport.c. */ 625 pdev->pd_resources[i].bst = pdev->pd_pa.pa_memt; 626 pdev->pd_resources[i].kva = bus_space_vaddr(pdev->pd_resources[i].bst, 627 pdev->pd_resources[i].bsh); 628 pdev->pd_resources[i].mapped = true; 629 630 return pdev->pd_resources[i].kva; 631 } 632 633 void 634 pci_iounmap(struct pci_dev *pdev, void __pci_iomem *kva) 635 { 636 unsigned i; 637 638 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 639 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 640 if (pdev->pd_resources[i].kva == kva) 641 break; 642 } 643 KASSERT(i < PCI_NUM_RESOURCES); 644 645 pdev->pd_resources[i].kva = NULL; 646 bus_space_unmap(pdev->pd_resources[i].bst, pdev->pd_resources[i].bsh, 647 pdev->pd_resources[i].size); 648 } 649 650 void 651 pci_save_state(struct pci_dev *pdev) 652 { 653 654 KASSERT(pdev->pd_saved_state == NULL); 655 pdev->pd_saved_state = kmem_alloc(sizeof(*pdev->pd_saved_state), 656 KM_SLEEP); 657 pci_conf_capture(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 658 pdev->pd_saved_state); 659 } 660 661 void 662 pci_restore_state(struct pci_dev *pdev) 663 { 664 665 KASSERT(pdev->pd_saved_state != NULL); 666 pci_conf_restore(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 667 pdev->pd_saved_state); 668 kmem_free(pdev->pd_saved_state, sizeof(*pdev->pd_saved_state)); 669 pdev->pd_saved_state = NULL; 670 } 671 672 bool 673 pci_is_pcie(struct pci_dev *pdev) 674 { 675 676 return (pci_find_capability(pdev, PCI_CAP_PCIEXPRESS) != 0); 677 } 678 679 bool 680 pci_dma_supported(struct pci_dev *pdev, uintmax_t mask) 681 { 682 683 /* XXX Cop-out. */ 684 if (mask > DMA_BIT_MASK(32)) 685 return pci_dma64_available(&pdev->pd_pa); 686 else 687 return true; 688 } 689 690 bool 691 pci_is_thunderbolt_attached(struct pci_dev *pdev) 692 { 693 694 /* XXX Cop-out. */ 695 return false; 696 } 697 698 bool 699 pci_is_root_bus(struct pci_bus *bus) 700 { 701 702 /* XXX Cop-out. */ 703 return false; 704 } 705 706 int 707 pci_domain_nr(struct pci_bus *bus) 708 { 709 710 return device_unit(bus->pb_dev); 711 } 712 713 /* 714 * We explicitly rename pci_enable/disable_device so that you have to 715 * review each use of them, since NetBSD's PCI API does _not_ respect 716 * our local enablecnt here, but there are different parts of NetBSD 717 * that automatically enable/disable like PMF, so you have to decide 718 * for each one whether to call it or not. 719 */ 720 721 int 722 linux_pci_enable_device(struct pci_dev *pdev) 723 { 724 const struct pci_attach_args *pa = &pdev->pd_pa; 725 pcireg_t csr; 726 int s; 727 728 if (pdev->pd_enablecnt++) 729 return 0; 730 731 s = splhigh(); 732 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 733 /* If someone else (firmware) already enabled it, credit them. */ 734 if (csr & (PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE)) 735 pdev->pd_enablecnt++; 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 return 0; 742 } 743 744 void 745 linux_pci_disable_device(struct pci_dev *pdev) 746 { 747 const struct pci_attach_args *pa = &pdev->pd_pa; 748 pcireg_t csr; 749 int s; 750 751 if (--pdev->pd_enablecnt) 752 return; 753 754 s = splhigh(); 755 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 756 csr &= ~PCI_COMMAND_IO_ENABLE; 757 csr &= ~PCI_COMMAND_MEM_ENABLE; 758 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 759 splx(s); 760 } 761 762 void 763 linux_pci_dev_destroy(struct pci_dev *pdev) 764 { 765 unsigned i; 766 767 if (pdev->bus != NULL) { 768 kmem_free(pdev->bus, sizeof(*pdev->bus)); 769 pdev->bus = NULL; 770 } 771 if (ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)) { 772 pci_unmap_rom(pdev, pdev->pd_rom_vaddr); 773 pdev->pd_rom_vaddr = 0; 774 } 775 for (i = 0; i < __arraycount(pdev->pd_resources); i++) { 776 if (!pdev->pd_resources[i].mapped) 777 continue; 778 bus_space_unmap(pdev->pd_resources[i].bst, 779 pdev->pd_resources[i].bsh, pdev->pd_resources[i].size); 780 } 781 782 /* There is no way these should be still in use. */ 783 KASSERT(pdev->pd_saved_state == NULL); 784 KASSERT(pdev->pd_intr_handles == NULL); 785 } 786 787 bool 788 dev_is_pci(struct pci_dev *pdev) 789 { 790 return pdev != NULL; 791 } 792
Indexes created Mon Sep 22 13:09:51 GMT 2025