1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Exceptions for specific devices. Usually work-arounds for fatal design flaws. 4 */ 5 6 #include <linux/delay.h> 7 #include <linux/dmi.h> 8 #include <linux/pci.h> 9 #include <linux/vgaarb.h> 10 #include <asm/hpet.h> 11 #include <asm/pci_x86.h> 12 13 static void pci_fixup_i450nx(struct pci_dev *d) 14 { 15 /* 16 * i450NX -- Find and scan all secondary buses on all PXB's. 17 */ 18 int pxb, reg; 19 u8 busno, suba, subb; 20 21 dev_warn(&d->dev, "Searching for i450NX host bridges\n"); 22 reg = 0xd0; 23 for(pxb = 0; pxb < 2; pxb++) { 24 pci_read_config_byte(d, reg++, &busno); 25 pci_read_config_byte(d, reg++, &suba); 26 pci_read_config_byte(d, reg++, &subb); 27 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, 28 suba, subb); 29 if (busno) 30 pcibios_scan_root(busno); /* Bus A */ 31 if (suba < subb) 32 pcibios_scan_root(suba+1); /* Bus B */ 33 } 34 pcibios_last_bus = -1; 35 } 36 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx); 37 38 static void pci_fixup_i450gx(struct pci_dev *d) 39 { 40 /* 41 * i450GX and i450KX -- Find and scan all secondary buses. 42 * (called separately for each PCI bridge found) 43 */ 44 u8 busno; 45 pci_read_config_byte(d, 0x4a, &busno); 46 dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno); 47 pcibios_scan_root(busno); 48 pcibios_last_bus = -1; 49 } 50 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx); 51 52 static void pci_fixup_umc_ide(struct pci_dev *d) 53 { 54 /* 55 * UM8886BF IDE controller sets region type bits incorrectly, 56 * therefore they look like memory despite of them being I/O. 57 */ 58 int i; 59 60 dev_warn(&d->dev, "Fixing base address flags\n"); 61 for(i = 0; i < 4; i++) 62 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO; 63 } 64 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide); 65 66 static void pci_fixup_latency(struct pci_dev *d) 67 { 68 /* 69 * SiS 5597 and 5598 chipsets require latency timer set to 70 * at most 32 to avoid lockups. 71 */ 72 dev_dbg(&d->dev, "Setting max latency to 32\n"); 73 pcibios_max_latency = 32; 74 } 75 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency); 76 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency); 77 78 static void pci_fixup_piix4_acpi(struct pci_dev *d) 79 { 80 /* 81 * PIIX4 ACPI device: hardwired IRQ9 82 */ 83 d->irq = 9; 84 } 85 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi); 86 87 /* 88 * Addresses issues with problems in the memory write queue timer in 89 * certain VIA Northbridges. This bugfix is per VIA's specifications, 90 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems 91 * to trigger a bug in its integrated ProSavage video card, which 92 * causes screen corruption. We only clear bits 6 and 7 for that chipset, 93 * until VIA can provide us with definitive information on why screen 94 * corruption occurs, and what exactly those bits do. 95 * 96 * VIA 8363,8622,8361 Northbridges: 97 * - bits 5, 6, 7 at offset 0x55 need to be turned off 98 * VIA 8367 (KT266x) Northbridges: 99 * - bits 5, 6, 7 at offset 0x95 need to be turned off 100 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges: 101 * - bits 6, 7 at offset 0x55 need to be turned off 102 */ 103 104 #define VIA_8363_KL133_REVISION_ID 0x81 105 #define VIA_8363_KM133_REVISION_ID 0x84 106 107 static void pci_fixup_via_northbridge_bug(struct pci_dev *d) 108 { 109 u8 v; 110 int where = 0x55; 111 int mask = 0x1f; /* clear bits 5, 6, 7 by default */ 112 113 if (d->device == PCI_DEVICE_ID_VIA_8367_0) { 114 /* fix pci bus latency issues resulted by NB bios error 115 it appears on bug free^Wreduced kt266x's bios forces 116 NB latency to zero */ 117 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0); 118 119 where = 0x95; /* the memory write queue timer register is 120 different for the KT266x's: 0x95 not 0x55 */ 121 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 && 122 (d->revision == VIA_8363_KL133_REVISION_ID || 123 d->revision == VIA_8363_KM133_REVISION_ID)) { 124 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5 125 causes screen corruption on the KL133/KM133 */ 126 } 127 128 pci_read_config_byte(d, where, &v); 129 if (v & ~mask) { 130 dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \ 131 d->device, d->revision, where, v, mask, v & mask); 132 v &= mask; 133 pci_write_config_byte(d, where, v); 134 } 135 } 136 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug); 137 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug); 138 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug); 139 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug); 140 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug); 141 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug); 142 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug); 143 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug); 144 145 /* 146 * For some reasons Intel decided that certain parts of their 147 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges 148 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM, 149 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according 150 * to Intel terminology. These devices do forward all addresses from 151 * system to PCI bus no matter what are their window settings, so they are 152 * "transparent" (or subtractive decoding) from programmers point of view. 153 */ 154 static void pci_fixup_transparent_bridge(struct pci_dev *dev) 155 { 156 if ((dev->device & 0xff00) == 0x2400) 157 dev->transparent = 1; 158 } 159 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, 160 PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge); 161 162 /* 163 * Fixup for C1 Halt Disconnect problem on nForce2 systems. 164 * 165 * From information provided by "Allen Martin" <AMartin@nvidia.com>: 166 * 167 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle 168 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns. 169 * This allows the state-machine and timer to return to a proper state within 170 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not 171 * issue another HALT within 80 ns of the initial HALT, the failure condition 172 * is avoided. 173 */ 174 static void pci_fixup_nforce2(struct pci_dev *dev) 175 { 176 u32 val; 177 178 /* 179 * Chip Old value New value 180 * C17 0x1F0FFF01 0x1F01FF01 181 * C18D 0x9F0FFF01 0x9F01FF01 182 * 183 * Northbridge chip version may be determined by 184 * reading the PCI revision ID (0xC1 or greater is C18D). 185 */ 186 pci_read_config_dword(dev, 0x6c, &val); 187 188 /* 189 * Apply fixup if needed, but don't touch disconnect state 190 */ 191 if ((val & 0x00FF0000) != 0x00010000) { 192 dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n"); 193 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000); 194 } 195 } 196 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2); 197 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2); 198 199 /* Max PCI Express root ports */ 200 #define MAX_PCIEROOT 6 201 static int quirk_aspm_offset[MAX_PCIEROOT << 3]; 202 203 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7)) 204 205 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) 206 { 207 return raw_pci_read(pci_domain_nr(bus), bus->number, 208 devfn, where, size, value); 209 } 210 211 /* 212 * Replace the original pci bus ops for write with a new one that will filter 213 * the request to insure ASPM cannot be enabled. 214 */ 215 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) 216 { 217 u8 offset; 218 219 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)]; 220 221 if ((offset) && (where == offset)) 222 value = value & ~PCI_EXP_LNKCTL_ASPMC; 223 224 return raw_pci_write(pci_domain_nr(bus), bus->number, 225 devfn, where, size, value); 226 } 227 228 static struct pci_ops quirk_pcie_aspm_ops = { 229 .read = quirk_pcie_aspm_read, 230 .write = quirk_pcie_aspm_write, 231 }; 232 233 /* 234 * Prevents PCI Express ASPM (Active State Power Management) being enabled. 235 * 236 * Save the register offset, where the ASPM control bits are located, 237 * for each PCI Express device that is in the device list of 238 * the root port in an array for fast indexing. Replace the bus ops 239 * with the modified one. 240 */ 241 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev) 242 { 243 int i; 244 struct pci_bus *pbus; 245 struct pci_dev *dev; 246 247 if ((pbus = pdev->subordinate) == NULL) 248 return; 249 250 /* 251 * Check if the DID of pdev matches one of the six root ports. This 252 * check is needed in the case this function is called directly by the 253 * hot-plug driver. 254 */ 255 if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) || 256 (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1)) 257 return; 258 259 if (list_empty(&pbus->devices)) { 260 /* 261 * If no device is attached to the root port at power-up or 262 * after hot-remove, the pbus->devices is empty and this code 263 * will set the offsets to zero and the bus ops to parent's bus 264 * ops, which is unmodified. 265 */ 266 for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i) 267 quirk_aspm_offset[i] = 0; 268 269 pci_bus_set_ops(pbus, pbus->parent->ops); 270 } else { 271 /* 272 * If devices are attached to the root port at power-up or 273 * after hot-add, the code loops through the device list of 274 * each root port to save the register offsets and replace the 275 * bus ops. 276 */ 277 list_for_each_entry(dev, &pbus->devices, bus_list) 278 /* There are 0 to 8 devices attached to this bus */ 279 quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] = 280 dev->pcie_cap + PCI_EXP_LNKCTL; 281 282 pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops); 283 dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n"); 284 } 285 286 } 287 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk); 288 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk); 289 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk); 290 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk); 291 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk); 292 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk); 293 294 /* 295 * Fixup to mark boot BIOS video selected by BIOS before it changes 296 * 297 * From information provided by "Jon Smirl" <jonsmirl@gmail.com> 298 * 299 * The standard boot ROM sequence for an x86 machine uses the BIOS 300 * to select an initial video card for boot display. This boot video 301 * card will have its BIOS copied to 0xC0000 in system RAM. 302 * IORESOURCE_ROM_SHADOW is used to associate the boot video 303 * card with this copy. On laptops this copy has to be used since 304 * the main ROM may be compressed or combined with another image. 305 * See pci_map_rom() for use of this flag. Before marking the device 306 * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set 307 * by either arch code or vga-arbitration; if so only apply the fixup to this 308 * already-determined primary video card. 309 */ 310 311 static void pci_fixup_video(struct pci_dev *pdev) 312 { 313 struct pci_dev *bridge; 314 struct pci_bus *bus; 315 u16 config; 316 struct resource *res; 317 318 /* Is VGA routed to us? */ 319 bus = pdev->bus; 320 while (bus) { 321 bridge = bus->self; 322 323 /* 324 * From information provided by 325 * "David Miller" <davem@davemloft.net> 326 * The bridge control register is valid for PCI header 327 * type BRIDGE, or CARDBUS. Host to PCI controllers use 328 * PCI header type NORMAL. 329 */ 330 if (bridge && (pci_is_bridge(bridge))) { 331 pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, 332 &config); 333 if (!(config & PCI_BRIDGE_CTL_VGA)) 334 return; 335 } 336 bus = bus->parent; 337 } 338 if (!vga_default_device() || pdev == vga_default_device()) { 339 pci_read_config_word(pdev, PCI_COMMAND, &config); 340 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { 341 res = &pdev->resource[PCI_ROM_RESOURCE]; 342 343 pci_disable_rom(pdev); 344 if (res->parent) 345 release_resource(res); 346 347 res->start = 0xC0000; 348 res->end = res->start + 0x20000 - 1; 349 res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | 350 IORESOURCE_PCI_FIXED; 351 dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n", 352 res); 353 } 354 } 355 } 356 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, 357 PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video); 358 359 360 static const struct dmi_system_id msi_k8t_dmi_table[] = { 361 { 362 .ident = "MSI-K8T-Neo2Fir", 363 .matches = { 364 DMI_MATCH(DMI_SYS_VENDOR, "MSI"), 365 DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"), 366 }, 367 }, 368 {} 369 }; 370 371 /* 372 * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound 373 * card if a PCI-soundcard is added. 374 * 375 * The BIOS only gives options "DISABLED" and "AUTO". This code sets 376 * the corresponding register-value to enable the soundcard. 377 * 378 * The soundcard is only enabled, if the mainboard is identified 379 * via DMI-tables and the soundcard is detected to be off. 380 */ 381 static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev) 382 { 383 unsigned char val; 384 if (!dmi_check_system(msi_k8t_dmi_table)) 385 return; /* only applies to MSI K8T Neo2-FIR */ 386 387 pci_read_config_byte(dev, 0x50, &val); 388 if (val & 0x40) { 389 pci_write_config_byte(dev, 0x50, val & (~0x40)); 390 391 /* verify the change for status output */ 392 pci_read_config_byte(dev, 0x50, &val); 393 if (val & 0x40) 394 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; " 395 "can't enable onboard soundcard!\n"); 396 else 397 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; " 398 "enabled onboard soundcard\n"); 399 } 400 } 401 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, 402 pci_fixup_msi_k8t_onboard_sound); 403 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, 404 pci_fixup_msi_k8t_onboard_sound); 405 406 /* 407 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A. 408 * 409 * We pretend to bring them out of full D3 state, and restore the proper 410 * IRQ, PCI cache line size, and BARs, otherwise the device won't function 411 * properly. In some cases, the device will generate an interrupt on 412 * the wrong IRQ line, causing any devices sharing the line it's 413 * *supposed* to use to be disabled by the kernel's IRQ debug code. 414 */ 415 static u16 toshiba_line_size; 416 417 static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = { 418 { 419 .ident = "Toshiba PS5 based laptop", 420 .matches = { 421 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 422 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"), 423 }, 424 }, 425 { 426 .ident = "Toshiba PSM4 based laptop", 427 .matches = { 428 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 429 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"), 430 }, 431 }, 432 { 433 .ident = "Toshiba A40 based laptop", 434 .matches = { 435 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 436 DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"), 437 }, 438 }, 439 { } 440 }; 441 442 static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev) 443 { 444 if (!dmi_check_system(toshiba_ohci1394_dmi_table)) 445 return; /* only applies to certain Toshibas (so far) */ 446 447 dev->current_state = PCI_D3cold; 448 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size); 449 } 450 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032, 451 pci_pre_fixup_toshiba_ohci1394); 452 453 static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev) 454 { 455 if (!dmi_check_system(toshiba_ohci1394_dmi_table)) 456 return; /* only applies to certain Toshibas (so far) */ 457 458 /* Restore config space on Toshiba laptops */ 459 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size); 460 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq); 461 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 462 pci_resource_start(dev, 0)); 463 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 464 pci_resource_start(dev, 1)); 465 } 466 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032, 467 pci_post_fixup_toshiba_ohci1394); 468 469 470 /* 471 * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device 472 * configuration space. 473 */ 474 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev) 475 { 476 u8 r; 477 /* clear 'F4 Video Configuration Trap' bit */ 478 pci_read_config_byte(dev, 0x42, &r); 479 r &= 0xfd; 480 pci_write_config_byte(dev, 0x42, r); 481 } 482 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, 483 pci_early_fixup_cyrix_5530); 484 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, 485 pci_early_fixup_cyrix_5530); 486 487 /* 488 * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller: 489 * prevent update of the BAR0, which doesn't look like a normal BAR. 490 */ 491 static void pci_siemens_interrupt_controller(struct pci_dev *dev) 492 { 493 dev->resource[0].flags |= IORESOURCE_PCI_FIXED; 494 } 495 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015, 496 pci_siemens_interrupt_controller); 497 498 /* 499 * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from 500 * confusing the PCI engine: 501 */ 502 static void sb600_disable_hpet_bar(struct pci_dev *dev) 503 { 504 u8 val; 505 506 /* 507 * The SB600 and SB700 both share the same device 508 * ID, but the PM register 0x55 does something different 509 * for the SB700, so make sure we are dealing with the 510 * SB600 before touching the bit: 511 */ 512 513 pci_read_config_byte(dev, 0x08, &val); 514 515 if (val < 0x2F) { 516 outb(0x55, 0xCD6); 517 val = inb(0xCD7); 518 519 /* Set bit 7 in PM register 0x55 */ 520 outb(0x55, 0xCD6); 521 outb(val | 0x80, 0xCD7); 522 } 523 } 524 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar); 525 526 #ifdef CONFIG_HPET_TIMER 527 static void sb600_hpet_quirk(struct pci_dev *dev) 528 { 529 struct resource *r = &dev->resource[1]; 530 531 if (r->flags & IORESOURCE_MEM && r->start == hpet_address) { 532 r->flags |= IORESOURCE_PCI_FIXED; 533 dev_info(&dev->dev, "reg 0x14 contains HPET; making it immovable\n"); 534 } 535 } 536 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x4385, sb600_hpet_quirk); 537 #endif 538 539 /* 540 * Twinhead H12Y needs us to block out a region otherwise we map devices 541 * there and any access kills the box. 542 * 543 * See: https://bugzilla.kernel.org/show_bug.cgi?id=10231 544 * 545 * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor) 546 */ 547 static void twinhead_reserve_killing_zone(struct pci_dev *dev) 548 { 549 if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) { 550 pr_info("Reserving memory on Twinhead H12Y\n"); 551 request_mem_region(0xFFB00000, 0x100000, "twinhead"); 552 } 553 } 554 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone); 555 556 /* 557 * Device [8086:2fc0] 558 * Erratum HSE43 559 * CONFIG_TDP_NOMINAL CSR Implemented at Incorrect Offset 560 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html 561 * 562 * Devices [8086:6f60,6fa0,6fc0] 563 * Erratum BDF2 564 * PCI BARs in the Home Agent Will Return Non-Zero Values During Enumeration 565 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html 566 */ 567 static void pci_invalid_bar(struct pci_dev *dev) 568 { 569 dev->non_compliant_bars = 1; 570 } 571 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar); 572 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar); 573 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar); 574 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar); 575 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ec, pci_invalid_bar); 576 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ed, pci_invalid_bar); 577 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26c, pci_invalid_bar); 578 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26d, pci_invalid_bar); 579 580 /* 581 * Device [1022:7808] 582 * 23. USB Wake on Connect/Disconnect with Low Speed Devices 583 * https://support.amd.com/TechDocs/46837.pdf 584 * Appendix A2 585 * https://support.amd.com/TechDocs/42413.pdf 586 */ 587 static void pci_fixup_amd_ehci_pme(struct pci_dev *dev) 588 { 589 dev_info(&dev->dev, "PME# does not work under D3, disabling it\n"); 590 dev->pme_support &= ~((PCI_PM_CAP_PME_D3hot | PCI_PM_CAP_PME_D3cold) 591 >> PCI_PM_CAP_PME_SHIFT); 592 } 593 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme); 594 595 /* 596 * Device [1022:7914] 597 * When in D0, PME# doesn't get asserted when plugging USB 2.0 device. 598 */ 599 static void pci_fixup_amd_fch_xhci_pme(struct pci_dev *dev) 600 { 601 dev_info(&dev->dev, "PME# does not work under D0, disabling it\n"); 602 dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT); 603 } 604 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7914, pci_fixup_amd_fch_xhci_pme); 605 606 /* 607 * Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff] 608 * 609 * Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to 610 * the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used 611 * for soft poweroff and suspend-to-RAM. 612 * 613 * As far as we know, this is related to the address space, not to the Root 614 * Port itself. Attaching the quirk to the Root Port is a convenience, but 615 * it could probably also be a standalone DMI quirk. 616 * 617 * https://bugzilla.kernel.org/show_bug.cgi?id=103211 618 */ 619 static void quirk_apple_mbp_poweroff(struct pci_dev *pdev) 620 { 621 struct device *dev = &pdev->dev; 622 struct resource *res; 623 624 if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") && 625 !dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) || 626 pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0)) 627 return; 628 629 res = request_mem_region(0x7fa00000, 0x200000, 630 "MacBook Pro poweroff workaround"); 631 if (res) 632 dev_info(dev, "claimed %s %pR\n", res->name, res); 633 else 634 dev_info(dev, "can't work around MacBook Pro poweroff issue\n"); 635 } 636 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff); 637 638 /* 639 * VMD-enabled root ports will change the source ID for all messages 640 * to the VMD device. Rather than doing device matching with the source 641 * ID, the AER driver should traverse the child device tree, reading 642 * AER registers to find the faulting device. 643 */ 644 static void quirk_no_aersid(struct pci_dev *pdev) 645 { 646 /* VMD Domain */ 647 if (is_vmd(pdev->bus) && pci_is_root_bus(pdev->bus)) 648 pdev->bus->bus_flags |= PCI_BUS_FLAGS_NO_AERSID; 649 } 650 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, 651 PCI_CLASS_BRIDGE_PCI, 8, quirk_no_aersid); 652 653 static void quirk_intel_th_dnv(struct pci_dev *dev) 654 { 655 struct resource *r = &dev->resource[4]; 656 657 /* 658 * Denverton reports 2k of RTIT_BAR (intel_th resource 4), which 659 * appears to be 4 MB in reality. 660 */ 661 if (r->end == r->start + 0x7ff) { 662 r->start = 0; 663 r->end = 0x3fffff; 664 r->flags |= IORESOURCE_UNSET; 665 } 666 } 667 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x19e1, quirk_intel_th_dnv); 668 669 #ifdef CONFIG_PHYS_ADDR_T_64BIT 670 671 #define AMD_141b_MMIO_BASE(x) (0x80 + (x) * 0x8) 672 #define AMD_141b_MMIO_BASE_RE_MASK BIT(0) 673 #define AMD_141b_MMIO_BASE_WE_MASK BIT(1) 674 #define AMD_141b_MMIO_BASE_MMIOBASE_MASK GENMASK(31,8) 675 676 #define AMD_141b_MMIO_LIMIT(x) (0x84 + (x) * 0x8) 677 #define AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK GENMASK(31,8) 678 679 #define AMD_141b_MMIO_HIGH(x) (0x180 + (x) * 0x4) 680 #define AMD_141b_MMIO_HIGH_MMIOBASE_MASK GENMASK(7,0) 681 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT 16 682 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK GENMASK(23,16) 683 684 /* 685 * The PCI Firmware Spec, rev 3.2, notes that ACPI should optionally allow 686 * configuring host bridge windows using the _PRS and _SRS methods. 687 * 688 * But this is rarely implemented, so we manually enable a large 64bit BAR for 689 * PCIe device on AMD Family 15h (Models 00h-1fh, 30h-3fh, 60h-7fh) Processors 690 * here. 691 */ 692 static void pci_amd_enable_64bit_bar(struct pci_dev *dev) 693 { 694 static const char *name = "PCI Bus 0000:00"; 695 struct resource *res, *conflict; 696 u32 base, limit, high; 697 struct pci_dev *other; 698 unsigned i; 699 700 if (!(pci_probe & PCI_BIG_ROOT_WINDOW)) 701 return; 702 703 /* Check that we are the only device of that type */ 704 other = pci_get_device(dev->vendor, dev->device, NULL); 705 if (other != dev || 706 (other = pci_get_device(dev->vendor, dev->device, other))) { 707 /* This is a multi-socket system, don't touch it for now */ 708 pci_dev_put(other); 709 return; 710 } 711 712 for (i = 0; i < 8; i++) { 713 pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base); 714 pci_read_config_dword(dev, AMD_141b_MMIO_HIGH(i), &high); 715 716 /* Is this slot free? */ 717 if (!(base & (AMD_141b_MMIO_BASE_RE_MASK | 718 AMD_141b_MMIO_BASE_WE_MASK))) 719 break; 720 721 base >>= 8; 722 base |= high << 24; 723 724 /* Abort if a slot already configures a 64bit BAR. */ 725 if (base > 0x10000) 726 return; 727 } 728 if (i == 8) 729 return; 730 731 res = kzalloc(sizeof(*res), GFP_KERNEL); 732 if (!res) 733 return; 734 735 /* 736 * Allocate a 256GB window directly below the 0xfd00000000 hardware 737 * limit (see AMD Family 15h Models 30h-3Fh BKDG, sec 2.4.6). 738 */ 739 res->name = name; 740 res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM | 741 IORESOURCE_MEM_64 | IORESOURCE_WINDOW; 742 res->start = 0xbd00000000ull; 743 res->end = 0xfd00000000ull - 1; 744 745 conflict = request_resource_conflict(&iomem_resource, res); 746 if (conflict) { 747 kfree(res); 748 if (conflict->name != name) 749 return; 750 751 /* We are resuming from suspend; just reenable the window */ 752 res = conflict; 753 } else { 754 dev_info(&dev->dev, "adding root bus resource %pR (tainting kernel)\n", 755 res); 756 add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); 757 pci_bus_add_resource(dev->bus, res, 0); 758 } 759 760 base = ((res->start >> 8) & AMD_141b_MMIO_BASE_MMIOBASE_MASK) | 761 AMD_141b_MMIO_BASE_RE_MASK | AMD_141b_MMIO_BASE_WE_MASK; 762 limit = ((res->end + 1) >> 8) & AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK; 763 high = ((res->start >> 40) & AMD_141b_MMIO_HIGH_MMIOBASE_MASK) | 764 ((((res->end + 1) >> 40) << AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT) 765 & AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK); 766 767 pci_write_config_dword(dev, AMD_141b_MMIO_HIGH(i), high); 768 pci_write_config_dword(dev, AMD_141b_MMIO_LIMIT(i), limit); 769 pci_write_config_dword(dev, AMD_141b_MMIO_BASE(i), base); 770 } 771 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar); 772 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar); 773 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar); 774 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar); 775 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar); 776 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar); 777 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar); 778 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar); 779 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar); 780 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar); 781 782 #define RS690_LOWER_TOP_OF_DRAM2 0x30 783 #define RS690_LOWER_TOP_OF_DRAM2_VALID 0x1 784 #define RS690_UPPER_TOP_OF_DRAM2 0x31 785 #define RS690_HTIU_NB_INDEX 0xA8 786 #define RS690_HTIU_NB_INDEX_WR_ENABLE 0x100 787 #define RS690_HTIU_NB_DATA 0xAC 788 789 /* 790 * Some BIOS implementations support RAM above 4GB, but do not configure the 791 * PCI host to respond to bus master accesses for these addresses. These 792 * implementations set the TOP_OF_DRAM_SLOT1 register correctly, so PCI DMA 793 * works as expected for addresses below 4GB. 794 * 795 * Reference: "AMD RS690 ASIC Family Register Reference Guide" (pg. 2-57) 796 * https://www.amd.com/system/files/TechDocs/43372_rs690_rrg_3.00o.pdf 797 */ 798 static void rs690_fix_64bit_dma(struct pci_dev *pdev) 799 { 800 u32 val = 0; 801 phys_addr_t top_of_dram = __pa(high_memory - 1) + 1; 802 803 if (top_of_dram <= (1ULL << 32)) 804 return; 805 806 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX, 807 RS690_LOWER_TOP_OF_DRAM2); 808 pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val); 809 810 if (val) 811 return; 812 813 pci_info(pdev, "Adjusting top of DRAM to %pa for 64-bit DMA support\n", &top_of_dram); 814 815 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX, 816 RS690_UPPER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE); 817 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32); 818 819 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX, 820 RS690_LOWER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE); 821 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, 822 top_of_dram | RS690_LOWER_TOP_OF_DRAM2_VALID); 823 } 824 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma); 825 826 #endif 827