linux_pci.c revision 1.6.10.1
1 /* $NetBSD: linux_pci.c,v 1.6.10.1 2020/01/25 22:38:50 ad 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 1.6.10.1 2020/01/25 22:38:50 ad 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 #ifdef notyet 270 const struct pci_attach_args *const pa = &pdev->pd_pa; 271 272 if (pci_msi_alloc_exact(pa, &pdev->pd_intr_handles, 1)) 273 return -EINVAL; 274 275 pdev->msi_enabled = 1; 276 return 0; 277 #else 278 return -ENOSYS; 279 #endif 280 } 281 282 void 283 pci_disable_msi(struct pci_dev *pdev __unused) 284 { 285 const struct pci_attach_args *const pa = &pdev->pd_pa; 286 287 if (pdev->pd_intr_handles != NULL) { 288 pci_intr_release(pa->pa_pc, pdev->pd_intr_handles, 1); 289 pdev->pd_intr_handles = NULL; 290 } 291 pdev->msi_enabled = 0; 292 } 293 294 void 295 pci_set_master(struct pci_dev *pdev) 296 { 297 pcireg_t csr; 298 299 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 300 PCI_COMMAND_STATUS_REG); 301 csr |= PCI_COMMAND_MASTER_ENABLE; 302 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 303 PCI_COMMAND_STATUS_REG, csr); 304 } 305 306 void 307 pci_clear_master(struct pci_dev *pdev) 308 { 309 pcireg_t csr; 310 311 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 312 PCI_COMMAND_STATUS_REG); 313 csr &= ~(pcireg_t)PCI_COMMAND_MASTER_ENABLE; 314 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 315 PCI_COMMAND_STATUS_REG, csr); 316 } 317 318 bus_addr_t 319 pcibios_align_resource(void *p, const struct resource *resource, 320 bus_addr_t addr, bus_size_t size) 321 { 322 panic("pcibios_align_resource has accessed unaligned neurons!"); 323 } 324 325 int 326 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *resource, 327 bus_size_t size, bus_size_t align, bus_addr_t start, int type __unused, 328 bus_addr_t (*align_fn)(void *, const struct resource *, bus_addr_t, 329 bus_size_t) __unused, 330 struct pci_dev *pdev) 331 { 332 const struct pci_attach_args *const pa = &pdev->pd_pa; 333 bus_space_tag_t bst; 334 int error; 335 336 switch (resource->flags) { 337 case IORESOURCE_MEM: 338 bst = pa->pa_memt; 339 break; 340 341 case IORESOURCE_IO: 342 bst = pa->pa_iot; 343 break; 344 345 default: 346 panic("I don't know what kind of resource you want!"); 347 } 348 349 resource->r_bst = bst; 350 error = bus_space_alloc(bst, start, __type_max(bus_addr_t), 351 size, align, 0, 0, &resource->start, &resource->r_bsh); 352 if (error) 353 return error; 354 355 resource->size = size; 356 return 0; 357 } 358 359 /* 360 * XXX Mega-kludgerific! pci_get_bus_and_slot and pci_get_class are 361 * defined only for their single purposes in i915drm, in 362 * i915_get_bridge_dev and intel_detect_pch. We can't define them more 363 * generally without adapting pci_find_device (and pci_enumerate_bus 364 * internally) to pass a cookie through. 365 */ 366 367 static int 368 pci_kludgey_match_bus0_dev0_func0(const struct pci_attach_args *pa) 369 { 370 371 if (pa->pa_bus != 0) 372 return 0; 373 if (pa->pa_device != 0) 374 return 0; 375 if (pa->pa_function != 0) 376 return 0; 377 378 return 1; 379 } 380 381 struct pci_dev * 382 pci_get_bus_and_slot(int bus, int slot) 383 { 384 struct pci_attach_args pa; 385 386 KASSERT(bus == 0); 387 KASSERT(slot == PCI_DEVFN(0, 0)); 388 389 if (!pci_find_device(&pa, &pci_kludgey_match_bus0_dev0_func0)) 390 return NULL; 391 392 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 393 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 394 395 return pdev; 396 } 397 398 static int 399 pci_kludgey_match_isa_bridge(const struct pci_attach_args *pa) 400 { 401 402 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 403 return 0; 404 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_BRIDGE_ISA) 405 return 0; 406 407 return 1; 408 } 409 410 void 411 pci_dev_put(struct pci_dev *pdev) 412 { 413 414 if (pdev == NULL) 415 return; 416 417 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_GET_MUMBLE)); 418 kmem_free(pdev->bus, sizeof(*pdev->bus)); 419 kmem_free(pdev, sizeof(*pdev)); 420 } 421 422 struct pci_dev * /* XXX i915 kludge */ 423 pci_get_class(uint32_t class_subclass_shifted __unused, struct pci_dev *from) 424 { 425 struct pci_attach_args pa; 426 427 KASSERT(class_subclass_shifted == (PCI_CLASS_BRIDGE_ISA << 8)); 428 429 if (from != NULL) { 430 pci_dev_put(from); 431 return NULL; 432 } 433 434 if (!pci_find_device(&pa, &pci_kludgey_match_isa_bridge)) 435 return NULL; 436 437 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 438 linux_pci_dev_init(pdev, NULL, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 439 440 return pdev; 441 } 442 443 void 444 pci_unmap_rom(struct pci_dev *pdev, void __pci_rom_iomem *vaddr __unused) 445 { 446 447 /* XXX Disable the ROM address decoder. */ 448 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 449 KASSERT(vaddr == pdev->pd_rom_vaddr); 450 bus_space_unmap(pdev->pd_rom_bst, pdev->pd_rom_bsh, pdev->pd_rom_size); 451 pdev->pd_kludges &= ~NBPCI_KLUDGE_MAP_ROM; 452 pdev->pd_rom_vaddr = NULL; 453 } 454 455 /* XXX Whattakludge! Should move this in sys/arch/. */ 456 static int 457 pci_map_rom_md(struct pci_dev *pdev) 458 { 459 #if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) 460 const bus_addr_t rom_base = 0xc0000; 461 const bus_size_t rom_size = 0x20000; 462 bus_space_handle_t rom_bsh; 463 int error; 464 465 if (PCI_CLASS(pdev->pd_pa.pa_class) != PCI_CLASS_DISPLAY) 466 return ENXIO; 467 if (PCI_SUBCLASS(pdev->pd_pa.pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 468 return ENXIO; 469 /* XXX Check whether this is the primary VGA card? */ 470 error = bus_space_map(pdev->pd_pa.pa_memt, rom_base, rom_size, 471 (BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE), &rom_bsh); 472 if (error) 473 return ENXIO; 474 475 pdev->pd_rom_bst = pdev->pd_pa.pa_memt; 476 pdev->pd_rom_bsh = rom_bsh; 477 pdev->pd_rom_size = rom_size; 478 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 479 480 return 0; 481 #else 482 return ENXIO; 483 #endif 484 } 485 486 void __pci_rom_iomem * 487 pci_map_rom(struct pci_dev *pdev, size_t *sizep) 488 { 489 490 KASSERT(!ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 491 492 if (pci_mapreg_map(&pdev->pd_pa, PCI_MAPREG_ROM, PCI_MAPREG_TYPE_ROM, 493 (BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR), 494 &pdev->pd_rom_bst, &pdev->pd_rom_bsh, NULL, &pdev->pd_rom_size) 495 != 0) 496 goto fail_mi; 497 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 498 499 /* XXX This type is obviously wrong in general... */ 500 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 501 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 502 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 503 pci_unmap_rom(pdev, NULL); 504 goto fail_mi; 505 } 506 goto success; 507 508 fail_mi: 509 if (pci_map_rom_md(pdev) != 0) 510 goto fail_md; 511 512 /* XXX This type is obviously wrong in general... */ 513 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 514 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 515 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 516 pci_unmap_rom(pdev, NULL); 517 goto fail_md; 518 } 519 520 success: 521 KASSERT(pdev->pd_rom_found_size <= SIZE_T_MAX); 522 *sizep = pdev->pd_rom_found_size; 523 pdev->pd_rom_vaddr = bus_space_vaddr(pdev->pd_rom_bst, 524 pdev->pd_rom_found_bsh); 525 return pdev->pd_rom_vaddr; 526 527 fail_md: 528 return NULL; 529 } 530 531 void __pci_rom_iomem * 532 pci_platform_rom(struct pci_dev *pdev __unused, size_t *sizep) 533 { 534 535 *sizep = 0; 536 return NULL; 537 } 538 539 int 540 pci_enable_rom(struct pci_dev *pdev) 541 { 542 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 543 const pcitag_t tag = pdev->pd_pa.pa_tag; 544 pcireg_t addr; 545 int s; 546 547 /* XXX Don't do anything if the ROM isn't there. */ 548 549 s = splhigh(); 550 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 551 addr |= PCI_MAPREG_ROM_ENABLE; 552 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 553 splx(s); 554 555 return 0; 556 } 557 558 void 559 pci_disable_rom(struct pci_dev *pdev) 560 { 561 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 562 const pcitag_t tag = pdev->pd_pa.pa_tag; 563 pcireg_t addr; 564 int s; 565 566 s = splhigh(); 567 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 568 addr &= ~(pcireg_t)PCI_MAPREG_ROM_ENABLE; 569 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 570 splx(s); 571 } 572 573 bus_addr_t 574 pci_resource_start(struct pci_dev *pdev, unsigned i) 575 { 576 577 KASSERT(i < PCI_NUM_RESOURCES); 578 return pdev->pd_resources[i].addr; 579 } 580 581 bus_size_t 582 pci_resource_len(struct pci_dev *pdev, unsigned i) 583 { 584 585 KASSERT(i < PCI_NUM_RESOURCES); 586 return pdev->pd_resources[i].size; 587 } 588 589 bus_addr_t 590 pci_resource_end(struct pci_dev *pdev, unsigned i) 591 { 592 593 return pci_resource_start(pdev, i) + (pci_resource_len(pdev, i) - 1); 594 } 595 596 int 597 pci_resource_flags(struct pci_dev *pdev, unsigned i) 598 { 599 600 KASSERT(i < PCI_NUM_RESOURCES); 601 return pdev->pd_resources[i].flags; 602 } 603 604 void __pci_iomem * 605 pci_iomap(struct pci_dev *pdev, unsigned i, bus_size_t size) 606 { 607 int error; 608 609 KASSERT(i < PCI_NUM_RESOURCES); 610 KASSERT(pdev->pd_resources[i].kva == NULL); 611 612 if (PCI_MAPREG_TYPE(pdev->pd_resources[i].type) != PCI_MAPREG_TYPE_MEM) 613 return NULL; 614 if (pdev->pd_resources[i].size < size) 615 return NULL; 616 error = bus_space_map(pdev->pd_pa.pa_memt, pdev->pd_resources[i].addr, 617 size, BUS_SPACE_MAP_LINEAR | pdev->pd_resources[i].flags, 618 &pdev->pd_resources[i].bsh); 619 if (error) 620 return NULL; 621 /* XXX Synchronize with drm_agp_borrow_hook in drm_agpsupport.c. */ 622 pdev->pd_resources[i].bst = pdev->pd_pa.pa_memt; 623 pdev->pd_resources[i].kva = bus_space_vaddr(pdev->pd_resources[i].bst, 624 pdev->pd_resources[i].bsh); 625 pdev->pd_resources[i].mapped = true; 626 627 return pdev->pd_resources[i].kva; 628 } 629 630 void 631 pci_iounmap(struct pci_dev *pdev, void __pci_iomem *kva) 632 { 633 unsigned i; 634 635 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 636 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 637 if (pdev->pd_resources[i].kva == kva) 638 break; 639 } 640 KASSERT(i < PCI_NUM_RESOURCES); 641 642 pdev->pd_resources[i].kva = NULL; 643 bus_space_unmap(pdev->pd_resources[i].bst, pdev->pd_resources[i].bsh, 644 pdev->pd_resources[i].size); 645 } 646 647 void 648 pci_save_state(struct pci_dev *pdev) 649 { 650 651 KASSERT(pdev->pd_saved_state == NULL); 652 pdev->pd_saved_state = kmem_alloc(sizeof(*pdev->pd_saved_state), 653 KM_SLEEP); 654 pci_conf_capture(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 655 pdev->pd_saved_state); 656 } 657 658 void 659 pci_restore_state(struct pci_dev *pdev) 660 { 661 662 KASSERT(pdev->pd_saved_state != NULL); 663 pci_conf_restore(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 664 pdev->pd_saved_state); 665 kmem_free(pdev->pd_saved_state, sizeof(*pdev->pd_saved_state)); 666 pdev->pd_saved_state = NULL; 667 } 668 669 bool 670 pci_is_pcie(struct pci_dev *pdev) 671 { 672 673 return (pci_find_capability(pdev, PCI_CAP_PCIEXPRESS) != 0); 674 } 675 676 bool 677 pci_dma_supported(struct pci_dev *pdev, uintmax_t mask) 678 { 679 680 /* XXX Cop-out. */ 681 if (mask > DMA_BIT_MASK(32)) 682 return pci_dma64_available(&pdev->pd_pa); 683 else 684 return true; 685 } 686 687 bool 688 pci_is_root_bus(struct pci_bus *bus) 689 { 690 691 /* XXX Cop-out. */ 692 return false; 693 } 694 695 int 696 pci_domain_nr(struct pci_bus *bus) 697 { 698 699 return device_unit(bus->pb_dev); 700 } 701 702 /* 703 * We explicitly rename pci_enable/disable_device so that you have to 704 * review each use of them, since NetBSD's PCI API does _not_ respect 705 * our local enablecnt here, but there are different parts of NetBSD 706 * that automatically enable/disable like PMF, so you have to decide 707 * for each one whether to call it or not. 708 */ 709 710 int 711 linux_pci_enable_device(struct pci_dev *pdev) 712 { 713 const struct pci_attach_args *pa = &pdev->pd_pa; 714 pcireg_t csr; 715 int s; 716 717 if (pdev->pd_enablecnt++) 718 return 0; 719 720 s = splhigh(); 721 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 722 /* If someone else (firmware) already enabled it, credit them. */ 723 if (csr & (PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE)) 724 pdev->pd_enablecnt++; 725 csr |= PCI_COMMAND_IO_ENABLE; 726 csr |= PCI_COMMAND_MEM_ENABLE; 727 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 728 splx(s); 729 730 return 0; 731 } 732 733 void 734 linux_pci_disable_device(struct pci_dev *pdev) 735 { 736 const struct pci_attach_args *pa = &pdev->pd_pa; 737 pcireg_t csr; 738 int s; 739 740 if (--pdev->pd_enablecnt) 741 return; 742 743 s = splhigh(); 744 csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 745 csr &= ~PCI_COMMAND_IO_ENABLE; 746 csr &= ~PCI_COMMAND_MEM_ENABLE; 747 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, csr); 748 splx(s); 749 } 750 751 void 752 linux_pci_dev_destroy(struct pci_dev *pdev) 753 { 754 unsigned i; 755 756 if (pdev->bus != NULL) { 757 kmem_free(pdev->bus, sizeof(*pdev->bus)); 758 pdev->bus = NULL; 759 } 760 if (ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)) { 761 pci_unmap_rom(pdev, pdev->pd_rom_vaddr); 762 pdev->pd_rom_vaddr = 0; 763 } 764 for (i = 0; i < __arraycount(pdev->pd_resources); i++) { 765 if (!pdev->pd_resources[i].mapped) 766 continue; 767 bus_space_unmap(pdev->pd_resources[i].bst, 768 pdev->pd_resources[i].bsh, pdev->pd_resources[i].size); 769 } 770 771 /* There is no way these should be still in use. */ 772 KASSERT(pdev->pd_saved_state == NULL); 773 KASSERT(pdev->pd_intr_handles == NULL); 774 } 775
Indexes created Mon Sep 22 13:09:51 GMT 2025