pci.h revision 1.11.2.4
1 /* $NetBSD: pci.h,v 1.11.2.4 2016/03/19 11:30:30 skrll 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 #ifndef _LINUX_PCI_H_ 33 #define _LINUX_PCI_H_ 34 35 #ifdef _KERNEL_OPT 36 #if defined(i386) || defined(amd64) 37 #include "acpica.h" 38 #else /* !(i386 || amd64) */ 39 #define NACPICA 0 40 #endif /* i386 || amd64 */ 41 #endif 42 43 #include <sys/types.h> 44 #include <sys/param.h> 45 #include <sys/bus.h> 46 #include <sys/cdefs.h> 47 #include <sys/kmem.h> 48 #include <sys/systm.h> 49 50 #include <machine/limits.h> 51 52 #include <dev/pci/pcidevs.h> 53 #include <dev/pci/pcireg.h> 54 #include <dev/pci/pcivar.h> 55 #include <dev/pci/agpvar.h> 56 57 #if NACPICA > 0 58 #include <dev/acpi/acpivar.h> 59 #include <dev/acpi/acpi_pci.h> 60 #else 61 struct acpi_devnode; 62 #endif 63 64 #include <linux/dma-mapping.h> 65 #include <linux/ioport.h> 66 #include <linux/kernel.h> 67 68 struct pci_bus { 69 u_int number; 70 }; 71 72 struct pci_device_id { 73 uint32_t vendor; 74 uint32_t device; 75 uint32_t subvendor; 76 uint32_t subdevice; 77 uint32_t class; 78 uint32_t class_mask; 79 unsigned long driver_data; 80 }; 81 82 #define PCI_ANY_ID ((pcireg_t)-1) 83 84 #define PCI_BASE_CLASS_DISPLAY PCI_CLASS_DISPLAY 85 86 #define PCI_CLASS_DISPLAY_VGA \ 87 ((PCI_CLASS_DISPLAY << 8) | PCI_SUBCLASS_DISPLAY_VGA) 88 #define PCI_CLASS_BRIDGE_ISA \ 89 ((PCI_CLASS_BRIDGE << 8) | PCI_SUBCLASS_BRIDGE_ISA) 90 CTASSERT(PCI_CLASS_BRIDGE_ISA == 0x0601); 91 92 /* XXX This is getting silly... */ 93 #define PCI_VENDOR_ID_ASUSTEK PCI_VENDOR_ASUSTEK 94 #define PCI_VENDOR_ID_ATI PCI_VENDOR_ATI 95 #define PCI_VENDOR_ID_DELL PCI_VENDOR_DELL 96 #define PCI_VENDOR_ID_IBM PCI_VENDOR_IBM 97 #define PCI_VENDOR_ID_HP PCI_VENDOR_HP 98 #define PCI_VENDOR_ID_INTEL PCI_VENDOR_INTEL 99 #define PCI_VENDOR_ID_NVIDIA PCI_VENDOR_NVIDIA 100 #define PCI_VENDOR_ID_SONY PCI_VENDOR_SONY 101 #define PCI_VENDOR_ID_VIA PCI_VENDOR_VIATECH 102 103 #define PCI_DEVICE_ID_ATI_RADEON_QY PCI_PRODUCT_ATI_RADEON_RV100_QY 104 105 #define PCI_DEVFN(DEV, FN) \ 106 (__SHIFTIN((DEV), __BITS(3, 7)) | __SHIFTIN((FN), __BITS(0, 2))) 107 #define PCI_SLOT(DEVFN) __SHIFTOUT((DEVFN), __BITS(3, 7)) 108 #define PCI_FUNC(DEVFN) __SHIFTOUT((DEVFN), __BITS(0, 2)) 109 110 #define PCI_NUM_RESOURCES ((PCI_MAPREG_END - PCI_MAPREG_START) / 4) 111 #define DEVICE_COUNT_RESOURCE PCI_NUM_RESOURCES 112 113 #define PCI_CAP_ID_AGP PCI_CAP_AGP 114 115 typedef int pci_power_t; 116 117 #define PCI_D0 0 118 #define PCI_D1 1 119 #define PCI_D2 2 120 #define PCI_D3hot 3 121 #define PCI_D3cold 4 122 123 #define __pci_iomem 124 125 struct pci_dev { 126 struct pci_attach_args pd_pa; 127 int pd_kludges; /* Gotta lose 'em... */ 128 #define NBPCI_KLUDGE_GET_MUMBLE 0x01 129 #define NBPCI_KLUDGE_MAP_ROM 0x02 130 bus_space_tag_t pd_rom_bst; 131 bus_space_handle_t pd_rom_bsh; 132 bus_size_t pd_rom_size; 133 bus_space_handle_t pd_rom_found_bsh; 134 bus_size_t pd_rom_found_size; 135 void *pd_rom_vaddr; 136 device_t pd_dev; 137 struct drm_device *pd_drm_dev; /* XXX Nouveau kludge! */ 138 struct { 139 pcireg_t type; 140 bus_addr_t addr; 141 bus_size_t size; 142 int flags; 143 bus_space_tag_t bst; 144 bus_space_handle_t bsh; 145 void __pci_iomem *kva; 146 } pd_resources[PCI_NUM_RESOURCES]; 147 struct pci_conf_state *pd_saved_state; 148 struct acpi_devnode *pd_ad; 149 struct pci_bus *bus; 150 uint32_t devfn; 151 uint16_t vendor; 152 uint16_t device; 153 uint16_t subsystem_vendor; 154 uint16_t subsystem_device; 155 uint8_t revision; 156 uint32_t class; 157 bool msi_enabled; 158 }; 159 160 static inline device_t 161 pci_dev_dev(struct pci_dev *pdev) 162 { 163 return pdev->pd_dev; 164 } 165 166 /* XXX Nouveau kludge! */ 167 static inline struct drm_device * 168 pci_get_drvdata(struct pci_dev *pdev) 169 { 170 return pdev->pd_drm_dev; 171 } 172 173 static inline void 174 linux_pci_dev_init(struct pci_dev *pdev, device_t dev, 175 const struct pci_attach_args *pa, int kludges) 176 { 177 const uint32_t subsystem_id = pci_conf_read(pa->pa_pc, pa->pa_tag, 178 PCI_SUBSYS_ID_REG); 179 unsigned i; 180 181 pdev->pd_pa = *pa; 182 pdev->pd_kludges = kludges; 183 pdev->pd_rom_vaddr = NULL; 184 pdev->pd_dev = dev; 185 #if (NACPICA > 0) 186 pdev->pd_ad = acpi_pcidev_find(0 /*XXX segment*/, pa->pa_bus, 187 pa->pa_device, pa->pa_function); 188 #else 189 pdev->pd_ad = NULL; 190 #endif 191 pdev->bus = kmem_zalloc(sizeof(struct pci_bus), KM_NOSLEEP); 192 pdev->bus->number = pa->pa_bus; 193 pdev->devfn = PCI_DEVFN(pa->pa_device, pa->pa_function); 194 pdev->vendor = PCI_VENDOR(pa->pa_id); 195 pdev->device = PCI_PRODUCT(pa->pa_id); 196 pdev->subsystem_vendor = PCI_SUBSYS_VENDOR(subsystem_id); 197 pdev->subsystem_device = PCI_SUBSYS_ID(subsystem_id); 198 pdev->revision = PCI_REVISION(pa->pa_class); 199 pdev->class = __SHIFTOUT(pa->pa_class, 0xffffff00UL); /* ? */ 200 201 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 202 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 203 const int reg = PCI_BAR(i); 204 205 pdev->pd_resources[i].type = pci_mapreg_type(pa->pa_pc, 206 pa->pa_tag, reg); 207 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 208 pdev->pd_resources[i].type, 209 &pdev->pd_resources[i].addr, 210 &pdev->pd_resources[i].size, 211 &pdev->pd_resources[i].flags)) { 212 pdev->pd_resources[i].addr = 0; 213 pdev->pd_resources[i].size = 0; 214 pdev->pd_resources[i].flags = 0; 215 } 216 pdev->pd_resources[i].kva = NULL; 217 } 218 } 219 220 static inline int 221 pci_find_capability(struct pci_dev *pdev, int cap) 222 { 223 return pci_get_capability(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, cap, 224 NULL, NULL); 225 } 226 227 static inline int 228 pci_read_config_dword(struct pci_dev *pdev, int reg, uint32_t *valuep) 229 { 230 KASSERT(!ISSET(reg, 3)); 231 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg); 232 return 0; 233 } 234 235 static inline int 236 pci_read_config_word(struct pci_dev *pdev, int reg, uint16_t *valuep) 237 { 238 KASSERT(!ISSET(reg, 1)); 239 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 240 (reg &~ 2)) >> (8 * (reg & 2)); 241 return 0; 242 } 243 244 static inline int 245 pci_read_config_byte(struct pci_dev *pdev, int reg, uint8_t *valuep) 246 { 247 *valuep = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 248 (reg &~ 3)) >> (8 * (reg & 3)); 249 return 0; 250 } 251 252 static inline int 253 pci_write_config_dword(struct pci_dev *pdev, int reg, uint32_t value) 254 { 255 KASSERT(!ISSET(reg, 3)); 256 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, reg, value); 257 return 0; 258 } 259 260 static inline void 261 pci_rmw_config(struct pci_dev *pdev, int reg, unsigned int bytes, 262 uint32_t value) 263 { 264 const uint32_t mask = ~((~0UL) << (8 * bytes)); 265 const int reg32 = (reg &~ 3); 266 const unsigned int shift = (8 * (reg & 3)); 267 uint32_t value32; 268 269 KASSERT(bytes <= 4); 270 KASSERT(!ISSET(value, ~mask)); 271 pci_read_config_dword(pdev, reg32, &value32); 272 value32 &=~ (mask << shift); 273 value32 |= (value << shift); 274 pci_write_config_dword(pdev, reg32, value32); 275 } 276 277 static inline int 278 pci_write_config_word(struct pci_dev *pdev, int reg, uint16_t value) 279 { 280 KASSERT(!ISSET(reg, 1)); 281 pci_rmw_config(pdev, reg, 2, value); 282 return 0; 283 } 284 285 static inline int 286 pci_write_config_byte(struct pci_dev *pdev, int reg, uint8_t value) 287 { 288 pci_rmw_config(pdev, reg, 1, value); 289 return 0; 290 } 291 292 /* 293 * XXX pci msi 294 */ 295 static inline int 296 pci_enable_msi(struct pci_dev *pdev) 297 { 298 return -ENOSYS; 299 } 300 301 static inline void 302 pci_disable_msi(struct pci_dev *pdev __unused) 303 { 304 KASSERT(pdev->msi_enabled); 305 } 306 307 static inline void 308 pci_set_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 |= 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 static inline void 320 pci_clear_master(struct pci_dev *pdev) 321 { 322 pcireg_t csr; 323 324 csr = pci_conf_read(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 325 PCI_COMMAND_STATUS_REG); 326 csr &= ~(pcireg_t)PCI_COMMAND_MASTER_ENABLE; 327 pci_conf_write(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 328 PCI_COMMAND_STATUS_REG, csr); 329 } 330 331 #define PCIBIOS_MIN_MEM 0x100000 /* XXX bogus x86 kludge bollocks */ 332 333 static inline bus_addr_t 334 pcibios_align_resource(void *p, const struct resource *resource, 335 bus_addr_t addr, bus_size_t size) 336 { 337 panic("pcibios_align_resource has accessed unaligned neurons!"); 338 } 339 340 static inline int 341 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *resource, 342 bus_size_t size, bus_size_t align, bus_addr_t start, int type __unused, 343 bus_addr_t (*align_fn)(void *, const struct resource *, bus_addr_t, 344 bus_size_t) __unused, 345 struct pci_dev *pdev) 346 { 347 const struct pci_attach_args *const pa = &pdev->pd_pa; 348 bus_space_tag_t bst; 349 int error; 350 351 switch (resource->flags) { 352 case IORESOURCE_MEM: 353 bst = pa->pa_memt; 354 break; 355 356 case IORESOURCE_IO: 357 bst = pa->pa_iot; 358 break; 359 360 default: 361 panic("I don't know what kind of resource you want!"); 362 } 363 364 resource->r_bst = bst; 365 error = bus_space_alloc(bst, start, __type_max(bus_addr_t), 366 size, align, 0, 0, &resource->start, &resource->r_bsh); 367 if (error) 368 return error; 369 370 resource->size = size; 371 return 0; 372 } 373 374 /* 375 * XXX Mega-kludgerific! pci_get_bus_and_slot and pci_get_class are 376 * defined only for their single purposes in i915drm, in 377 * i915_get_bridge_dev and intel_detect_pch. We can't define them more 378 * generally without adapting pci_find_device (and pci_enumerate_bus 379 * internally) to pass a cookie through. 380 */ 381 382 static inline int /* XXX inline? */ 383 pci_kludgey_match_bus0_dev0_func0(const struct pci_attach_args *pa) 384 { 385 386 if (pa->pa_bus != 0) 387 return 0; 388 if (pa->pa_device != 0) 389 return 0; 390 if (pa->pa_function != 0) 391 return 0; 392 393 return 1; 394 } 395 396 static inline struct pci_dev * 397 pci_get_bus_and_slot(int bus, int slot) 398 { 399 struct pci_attach_args pa; 400 401 KASSERT(bus == 0); 402 KASSERT(slot == PCI_DEVFN(0, 0)); 403 404 if (!pci_find_device(&pa, &pci_kludgey_match_bus0_dev0_func0)) 405 return NULL; 406 407 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 408 linux_pci_dev_init(pdev, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 409 410 return pdev; 411 } 412 413 static inline int /* XXX inline? */ 414 pci_kludgey_match_isa_bridge(const struct pci_attach_args *pa) 415 { 416 417 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 418 return 0; 419 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_BRIDGE_ISA) 420 return 0; 421 422 return 1; 423 } 424 425 static inline void 426 pci_dev_put(struct pci_dev *pdev) 427 { 428 429 if (pdev == NULL) 430 return; 431 432 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_GET_MUMBLE)); 433 kmem_free(pdev, sizeof(*pdev)); 434 } 435 436 static inline struct pci_dev * 437 pci_get_class(uint32_t class_subclass_shifted __unused, struct pci_dev *from) 438 { 439 struct pci_attach_args pa; 440 441 KASSERT(class_subclass_shifted == (PCI_CLASS_BRIDGE_ISA << 8)); 442 443 if (from != NULL) { 444 pci_dev_put(from); 445 return NULL; 446 } 447 448 if (!pci_find_device(&pa, &pci_kludgey_match_isa_bridge)) 449 return NULL; 450 451 struct pci_dev *const pdev = kmem_zalloc(sizeof(*pdev), KM_SLEEP); 452 linux_pci_dev_init(pdev, NULL, &pa, NBPCI_KLUDGE_GET_MUMBLE); 453 454 return pdev; 455 } 456 457 #define __pci_rom_iomem 458 459 static inline void 460 pci_unmap_rom(struct pci_dev *pdev, void __pci_rom_iomem *vaddr __unused) 461 { 462 463 /* XXX Disable the ROM address decoder. */ 464 KASSERT(ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 465 KASSERT(vaddr == pdev->pd_rom_vaddr); 466 bus_space_unmap(pdev->pd_rom_bst, pdev->pd_rom_bsh, pdev->pd_rom_size); 467 pdev->pd_kludges &= ~NBPCI_KLUDGE_MAP_ROM; 468 pdev->pd_rom_vaddr = NULL; 469 } 470 471 /* XXX Whattakludge! Should move this in sys/arch/. */ 472 static int 473 pci_map_rom_md(struct pci_dev *pdev) 474 { 475 #if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) 476 const bus_addr_t rom_base = 0xc0000; 477 const bus_size_t rom_size = 0x20000; 478 bus_space_handle_t rom_bsh; 479 int error; 480 481 if (PCI_CLASS(pdev->pd_pa.pa_class) != PCI_CLASS_DISPLAY) 482 return ENXIO; 483 if (PCI_SUBCLASS(pdev->pd_pa.pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 484 return ENXIO; 485 /* XXX Check whether this is the primary VGA card? */ 486 error = bus_space_map(pdev->pd_pa.pa_memt, rom_base, rom_size, 487 (BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE), &rom_bsh); 488 if (error) 489 return ENXIO; 490 491 pdev->pd_rom_bst = pdev->pd_pa.pa_memt; 492 pdev->pd_rom_bsh = rom_bsh; 493 pdev->pd_rom_size = rom_size; 494 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 495 496 return 0; 497 #else 498 return ENXIO; 499 #endif 500 } 501 502 static inline void __pci_rom_iomem * 503 pci_map_rom(struct pci_dev *pdev, size_t *sizep) 504 { 505 506 KASSERT(!ISSET(pdev->pd_kludges, NBPCI_KLUDGE_MAP_ROM)); 507 508 if (pci_mapreg_map(&pdev->pd_pa, PCI_MAPREG_ROM, PCI_MAPREG_TYPE_ROM, 509 (BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR), 510 &pdev->pd_rom_bst, &pdev->pd_rom_bsh, NULL, &pdev->pd_rom_size) 511 != 0) 512 goto fail_mi; 513 pdev->pd_kludges |= NBPCI_KLUDGE_MAP_ROM; 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_mi; 521 } 522 goto success; 523 524 fail_mi: 525 if (pci_map_rom_md(pdev) != 0) 526 goto fail_md; 527 528 /* XXX This type is obviously wrong in general... */ 529 if (pci_find_rom(&pdev->pd_pa, pdev->pd_rom_bst, pdev->pd_rom_bsh, 530 pdev->pd_rom_size, PCI_ROM_CODE_TYPE_X86, 531 &pdev->pd_rom_found_bsh, &pdev->pd_rom_found_size)) { 532 pci_unmap_rom(pdev, NULL); 533 goto fail_md; 534 } 535 536 success: 537 KASSERT(pdev->pd_rom_found_size <= SIZE_T_MAX); 538 *sizep = pdev->pd_rom_found_size; 539 pdev->pd_rom_vaddr = bus_space_vaddr(pdev->pd_rom_bst, 540 pdev->pd_rom_found_bsh); 541 return pdev->pd_rom_vaddr; 542 543 fail_md: 544 return NULL; 545 } 546 547 static inline void __pci_rom_iomem * 548 pci_platform_rom(struct pci_dev *pdev __unused, size_t *sizep) 549 { 550 551 *sizep = 0; 552 return NULL; 553 } 554 555 static inline int 556 pci_enable_rom(struct pci_dev *pdev) 557 { 558 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 559 const pcitag_t tag = pdev->pd_pa.pa_tag; 560 pcireg_t addr; 561 int s; 562 563 /* XXX Don't do anything if the ROM isn't there. */ 564 565 s = splhigh(); 566 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 567 addr |= PCI_MAPREG_ROM_ENABLE; 568 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 569 splx(s); 570 571 return 0; 572 } 573 574 static inline void 575 pci_disable_rom(struct pci_dev *pdev) 576 { 577 const pci_chipset_tag_t pc = pdev->pd_pa.pa_pc; 578 const pcitag_t tag = pdev->pd_pa.pa_tag; 579 pcireg_t addr; 580 int s; 581 582 s = splhigh(); 583 addr = pci_conf_read(pc, tag, PCI_MAPREG_ROM); 584 addr &= ~(pcireg_t)PCI_MAPREG_ROM_ENABLE; 585 pci_conf_write(pc, tag, PCI_MAPREG_ROM, addr); 586 splx(s); 587 } 588 589 static inline bus_addr_t 590 pci_resource_start(struct pci_dev *pdev, unsigned i) 591 { 592 593 KASSERT(i < PCI_NUM_RESOURCES); 594 return pdev->pd_resources[i].addr; 595 } 596 597 static inline bus_size_t 598 pci_resource_len(struct pci_dev *pdev, unsigned i) 599 { 600 601 KASSERT(i < PCI_NUM_RESOURCES); 602 return pdev->pd_resources[i].size; 603 } 604 605 static inline bus_addr_t 606 pci_resource_end(struct pci_dev *pdev, unsigned i) 607 { 608 609 return pci_resource_start(pdev, i) + (pci_resource_len(pdev, i) - 1); 610 } 611 612 static inline int 613 pci_resource_flags(struct pci_dev *pdev, unsigned i) 614 { 615 616 KASSERT(i < PCI_NUM_RESOURCES); 617 return pdev->pd_resources[i].flags; 618 } 619 620 static inline void __pci_iomem * 621 pci_iomap(struct pci_dev *pdev, unsigned i, bus_size_t size) 622 { 623 int error; 624 625 KASSERT(i < PCI_NUM_RESOURCES); 626 KASSERT(pdev->pd_resources[i].kva == NULL); 627 628 if (PCI_MAPREG_TYPE(pdev->pd_resources[i].type) != PCI_MAPREG_TYPE_MEM) 629 return NULL; 630 if (pdev->pd_resources[i].size < size) 631 return NULL; 632 error = bus_space_map(pdev->pd_pa.pa_memt, pdev->pd_resources[i].addr, 633 size, BUS_SPACE_MAP_LINEAR | pdev->pd_resources[i].flags, 634 &pdev->pd_resources[i].bsh); 635 if (error) { 636 /* Horrible hack: try asking the fake AGP device. */ 637 if (!agp_i810_borrow(pdev->pd_resources[i].addr, size, 638 &pdev->pd_resources[i].bsh)) 639 return NULL; 640 } 641 pdev->pd_resources[i].bst = pdev->pd_pa.pa_memt; 642 pdev->pd_resources[i].kva = bus_space_vaddr(pdev->pd_resources[i].bst, 643 pdev->pd_resources[i].bsh); 644 645 return pdev->pd_resources[i].kva; 646 } 647 648 static inline void 649 pci_iounmap(struct pci_dev *pdev, void __pci_iomem *kva) 650 { 651 unsigned i; 652 653 CTASSERT(__arraycount(pdev->pd_resources) == PCI_NUM_RESOURCES); 654 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 655 if (pdev->pd_resources[i].kva == kva) 656 break; 657 } 658 KASSERT(i < PCI_NUM_RESOURCES); 659 660 pdev->pd_resources[i].kva = NULL; 661 bus_space_unmap(pdev->pd_resources[i].bst, pdev->pd_resources[i].bsh, 662 pdev->pd_resources[i].size); 663 } 664 665 static inline void 666 pci_save_state(struct pci_dev *pdev) 667 { 668 669 KASSERT(pdev->pd_saved_state == NULL); 670 pdev->pd_saved_state = kmem_alloc(sizeof(*pdev->pd_saved_state), 671 KM_SLEEP); 672 pci_conf_capture(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 673 pdev->pd_saved_state); 674 } 675 676 static inline void 677 pci_restore_state(struct pci_dev *pdev) 678 { 679 680 KASSERT(pdev->pd_saved_state != NULL); 681 pci_conf_restore(pdev->pd_pa.pa_pc, pdev->pd_pa.pa_tag, 682 pdev->pd_saved_state); 683 kmem_free(pdev->pd_saved_state, sizeof(*pdev->pd_saved_state)); 684 pdev->pd_saved_state = NULL; 685 } 686 687 static inline bool 688 pci_is_pcie(struct pci_dev *pdev) 689 { 690 691 return (pci_find_capability(pdev, PCI_CAP_PCIEXPRESS) != 0); 692 } 693 694 static inline bool 695 pci_dma_supported(struct pci_dev *pdev, uintmax_t mask) 696 { 697 698 /* XXX Cop-out. */ 699 if (mask > DMA_BIT_MASK(32)) 700 return pci_dma64_available(&pdev->pd_pa); 701 else 702 return true; 703 } 704 705 #endif /* _LINUX_PCI_H_ */ 706
Indexes created Tue Sep 30 20:09:53 GMT 2025