1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains work-arounds for many known PCI hardware bugs.
4 * Devices present only on certain architectures (host bridges et cetera)
5 * should be handled in arch-specific code.
7 * Note: any quirks for hotpluggable devices must _NOT_ be declared __init.
11 * Init/reset quirks for USB host controllers should be in the USB quirks
12 * file, where their drivers can use them.
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/export.h>
18 #include <linux/pci.h>
19 #include <linux/init.h>
20 #include <linux/delay.h>
21 #include <linux/acpi.h>
22 #include <linux/dmi.h>
23 #include <linux/ioport.h>
24 #include <linux/sched.h>
25 #include <linux/ktime.h>
27 #include <linux/nvme.h>
28 #include <linux/platform_data/x86/apple.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/suspend.h>
31 #include <linux/switchtec.h>
32 #include <asm/dma.h> /* isa_dma_bridge_buggy */
35 static ktime_t fixup_debug_start(struct pci_dev *dev,
36 void (*fn)(struct pci_dev *dev))
39 pci_info(dev, "calling %pS @ %i\n", fn, task_pid_nr(current));
44 static void fixup_debug_report(struct pci_dev *dev, ktime_t calltime,
45 void (*fn)(struct pci_dev *dev))
47 ktime_t delta, rettime;
48 unsigned long long duration;
50 rettime = ktime_get();
51 delta = ktime_sub(rettime, calltime);
52 duration = (unsigned long long) ktime_to_ns(delta) >> 10;
53 if (initcall_debug || duration > 10000)
54 pci_info(dev, "%pS took %lld usecs\n", fn, duration);
57 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
58 struct pci_fixup *end)
63 if ((f->class == (u32) (dev->class >> f->class_shift) ||
64 f->class == (u32) PCI_ANY_ID) &&
65 (f->vendor == dev->vendor ||
66 f->vendor == (u16) PCI_ANY_ID) &&
67 (f->device == dev->device ||
68 f->device == (u16) PCI_ANY_ID)) {
69 void (*hook)(struct pci_dev *dev);
70 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
71 hook = offset_to_ptr(&f->hook_offset);
75 calltime = fixup_debug_start(dev, hook);
77 fixup_debug_report(dev, calltime, hook);
81 extern struct pci_fixup __start_pci_fixups_early[];
82 extern struct pci_fixup __end_pci_fixups_early[];
83 extern struct pci_fixup __start_pci_fixups_header[];
84 extern struct pci_fixup __end_pci_fixups_header[];
85 extern struct pci_fixup __start_pci_fixups_final[];
86 extern struct pci_fixup __end_pci_fixups_final[];
87 extern struct pci_fixup __start_pci_fixups_enable[];
88 extern struct pci_fixup __end_pci_fixups_enable[];
89 extern struct pci_fixup __start_pci_fixups_resume[];
90 extern struct pci_fixup __end_pci_fixups_resume[];
91 extern struct pci_fixup __start_pci_fixups_resume_early[];
92 extern struct pci_fixup __end_pci_fixups_resume_early[];
93 extern struct pci_fixup __start_pci_fixups_suspend[];
94 extern struct pci_fixup __end_pci_fixups_suspend[];
95 extern struct pci_fixup __start_pci_fixups_suspend_late[];
96 extern struct pci_fixup __end_pci_fixups_suspend_late[];
98 static bool pci_apply_fixup_final_quirks;
100 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
102 struct pci_fixup *start, *end;
105 case pci_fixup_early:
106 start = __start_pci_fixups_early;
107 end = __end_pci_fixups_early;
110 case pci_fixup_header:
111 start = __start_pci_fixups_header;
112 end = __end_pci_fixups_header;
115 case pci_fixup_final:
116 if (!pci_apply_fixup_final_quirks)
118 start = __start_pci_fixups_final;
119 end = __end_pci_fixups_final;
122 case pci_fixup_enable:
123 start = __start_pci_fixups_enable;
124 end = __end_pci_fixups_enable;
127 case pci_fixup_resume:
128 start = __start_pci_fixups_resume;
129 end = __end_pci_fixups_resume;
132 case pci_fixup_resume_early:
133 start = __start_pci_fixups_resume_early;
134 end = __end_pci_fixups_resume_early;
137 case pci_fixup_suspend:
138 start = __start_pci_fixups_suspend;
139 end = __end_pci_fixups_suspend;
142 case pci_fixup_suspend_late:
143 start = __start_pci_fixups_suspend_late;
144 end = __end_pci_fixups_suspend_late;
148 /* stupid compiler warning, you would think with an enum... */
151 pci_do_fixups(dev, start, end);
153 EXPORT_SYMBOL(pci_fixup_device);
155 static int __init pci_apply_final_quirks(void)
157 struct pci_dev *dev = NULL;
161 if (pci_cache_line_size)
162 pr_info("PCI: CLS %u bytes\n", pci_cache_line_size << 2);
164 pci_apply_fixup_final_quirks = true;
165 for_each_pci_dev(dev) {
166 pci_fixup_device(pci_fixup_final, dev);
168 * If arch hasn't set it explicitly yet, use the CLS
169 * value shared by all PCI devices. If there's a
170 * mismatch, fall back to the default value.
172 if (!pci_cache_line_size) {
173 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &tmp);
176 if (!tmp || cls == tmp)
179 pci_info(dev, "CLS mismatch (%u != %u), using %u bytes\n",
181 pci_dfl_cache_line_size << 2);
182 pci_cache_line_size = pci_dfl_cache_line_size;
186 if (!pci_cache_line_size) {
187 pr_info("PCI: CLS %u bytes, default %u\n", cls << 2,
188 pci_dfl_cache_line_size << 2);
189 pci_cache_line_size = cls ? cls : pci_dfl_cache_line_size;
194 fs_initcall_sync(pci_apply_final_quirks);
197 * Decoding should be disabled for a PCI device during BAR sizing to avoid
198 * conflict. But doing so may cause problems on host bridge and perhaps other
199 * key system devices. For devices that need to have mmio decoding always-on,
200 * we need to set the dev->mmio_always_on bit.
202 static void quirk_mmio_always_on(struct pci_dev *dev)
204 dev->mmio_always_on = 1;
206 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_ANY_ID, PCI_ANY_ID,
207 PCI_CLASS_BRIDGE_HOST, 8, quirk_mmio_always_on);
210 * The Mellanox Tavor device gives false positive parity errors. Disable
211 * parity error reporting.
213 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR, pci_disable_parity);
214 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE, pci_disable_parity);
217 * Deal with broken BIOSes that neglect to enable passive release,
218 * which can cause problems in combination with the 82441FX/PPro MTRRs
220 static void quirk_passive_release(struct pci_dev *dev)
222 struct pci_dev *d = NULL;
226 * We have to make sure a particular bit is set in the PIIX3
227 * ISA bridge, so we have to go out and find it.
229 while ((d = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
230 pci_read_config_byte(d, 0x82, &dlc);
232 pci_info(d, "PIIX3: Enabling Passive Release\n");
234 pci_write_config_byte(d, 0x82, dlc);
238 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
239 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
242 * The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a
243 * workaround but VIA don't answer queries. If you happen to have good
244 * contacts at VIA ask them for me please -- Alan
246 * This appears to be BIOS not version dependent. So presumably there is a
249 static void quirk_isa_dma_hangs(struct pci_dev *dev)
251 if (!isa_dma_bridge_buggy) {
252 isa_dma_bridge_buggy = 1;
253 pci_info(dev, "Activating ISA DMA hang workarounds\n");
257 * It's not totally clear which chipsets are the problematic ones. We know
258 * 82C586 and 82C596 variants are affected.
260 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0, quirk_isa_dma_hangs);
261 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596, quirk_isa_dma_hangs);
262 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, quirk_isa_dma_hangs);
263 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma_hangs);
264 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs);
265 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs);
266 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs);
269 * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear
270 * for some HT machines to use C4 w/o hanging.
272 static void quirk_tigerpoint_bm_sts(struct pci_dev *dev)
277 pci_read_config_dword(dev, 0x40, &pmbase);
278 pmbase = pmbase & 0xff80;
282 pci_info(dev, FW_BUG "TigerPoint LPC.BM_STS cleared\n");
286 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TGP_LPC, quirk_tigerpoint_bm_sts);
288 /* Chipsets where PCI->PCI transfers vanish or hang */
289 static void quirk_nopcipci(struct pci_dev *dev)
291 if ((pci_pci_problems & PCIPCI_FAIL) == 0) {
292 pci_info(dev, "Disabling direct PCI/PCI transfers\n");
293 pci_pci_problems |= PCIPCI_FAIL;
296 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, quirk_nopcipci);
297 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_496, quirk_nopcipci);
299 static void quirk_nopciamd(struct pci_dev *dev)
302 pci_read_config_byte(dev, 0x08, &rev);
305 pci_info(dev, "Chipset erratum: Disabling direct PCI/AGP transfers\n");
306 pci_pci_problems |= PCIAGP_FAIL;
309 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8151_0, quirk_nopciamd);
311 /* Triton requires workarounds to be used by the drivers */
312 static void quirk_triton(struct pci_dev *dev)
314 if ((pci_pci_problems&PCIPCI_TRITON) == 0) {
315 pci_info(dev, "Limiting direct PCI/PCI transfers\n");
316 pci_pci_problems |= PCIPCI_TRITON;
319 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437, quirk_triton);
320 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437VX, quirk_triton);
321 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439, quirk_triton);
322 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439TX, quirk_triton);
325 * VIA Apollo KT133 needs PCI latency patch
326 * Made according to a Windows driver-based patch by George E. Breese;
327 * see PCI Latency Adjust on http://www.viahardware.com/download/viatweak.shtm
328 * Also see http://www.au-ja.org/review-kt133a-1-en.phtml for the info on
329 * which Mr Breese based his work.
331 * Updated based on further information from the site and also on
332 * information provided by VIA
334 static void quirk_vialatency(struct pci_dev *dev)
340 * Ok, we have a potential problem chipset here. Now see if we have
341 * a buggy southbridge.
343 p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
347 * 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A;
349 * Check for buggy part revisions
351 if (p->revision < 0x40 || p->revision > 0x42)
354 p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
355 if (p == NULL) /* No problem parts */
358 /* Check for buggy part revisions */
359 if (p->revision < 0x10 || p->revision > 0x12)
364 * Ok we have the problem. Now set the PCI master grant to occur
365 * every master grant. The apparent bug is that under high PCI load
366 * (quite common in Linux of course) you can get data loss when the
367 * CPU is held off the bus for 3 bus master requests. This happens
368 * to include the IDE controllers....
370 * VIA only apply this fix when an SB Live! is present but under
371 * both Linux and Windows this isn't enough, and we have seen
372 * corruption without SB Live! but with things like 3 UDMA IDE
373 * controllers. So we ignore that bit of the VIA recommendation..
375 pci_read_config_byte(dev, 0x76, &busarb);
378 * Set bit 4 and bit 5 of byte 76 to 0x01
379 * "Master priority rotation on every PCI master grant"
383 pci_write_config_byte(dev, 0x76, busarb);
384 pci_info(dev, "Applying VIA southbridge workaround\n");
388 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency);
389 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency);
390 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, quirk_vialatency);
391 /* Must restore this on a resume from RAM */
392 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency);
393 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency);
394 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, quirk_vialatency);
396 /* VIA Apollo VP3 needs ETBF on BT848/878 */
397 static void quirk_viaetbf(struct pci_dev *dev)
399 if ((pci_pci_problems&PCIPCI_VIAETBF) == 0) {
400 pci_info(dev, "Limiting direct PCI/PCI transfers\n");
401 pci_pci_problems |= PCIPCI_VIAETBF;
404 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_viaetbf);
406 static void quirk_vsfx(struct pci_dev *dev)
408 if ((pci_pci_problems&PCIPCI_VSFX) == 0) {
409 pci_info(dev, "Limiting direct PCI/PCI transfers\n");
410 pci_pci_problems |= PCIPCI_VSFX;
413 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576, quirk_vsfx);
416 * ALi Magik requires workarounds to be used by the drivers that DMA to AGP
417 * space. Latency must be set to 0xA and Triton workaround applied too.
418 * [Info kindly provided by ALi]
420 static void quirk_alimagik(struct pci_dev *dev)
422 if ((pci_pci_problems&PCIPCI_ALIMAGIK) == 0) {
423 pci_info(dev, "Limiting direct PCI/PCI transfers\n");
424 pci_pci_problems |= PCIPCI_ALIMAGIK|PCIPCI_TRITON;
427 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1647, quirk_alimagik);
428 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1651, quirk_alimagik);
430 /* Natoma has some interesting boundary conditions with Zoran stuff at least */
431 static void quirk_natoma(struct pci_dev *dev)
433 if ((pci_pci_problems&PCIPCI_NATOMA) == 0) {
434 pci_info(dev, "Limiting direct PCI/PCI transfers\n");
435 pci_pci_problems |= PCIPCI_NATOMA;
438 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_natoma);
439 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_0, quirk_natoma);
440 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_1, quirk_natoma);
441 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_0, quirk_natoma);
442 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_1, quirk_natoma);
443 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_2, quirk_natoma);
446 * This chip can cause PCI parity errors if config register 0xA0 is read
447 * while DMAs are occurring.
449 static void quirk_citrine(struct pci_dev *dev)
451 dev->cfg_size = 0xA0;
453 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, quirk_citrine);
456 * This chip can cause bus lockups if config addresses above 0x600
457 * are read or written.
459 static void quirk_nfp6000(struct pci_dev *dev)
461 dev->cfg_size = 0x600;
463 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP4000, quirk_nfp6000);
464 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000, quirk_nfp6000);
465 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP5000, quirk_nfp6000);
466 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000_VF, quirk_nfp6000);
468 /* On IBM Crocodile ipr SAS adapters, expand BAR to system page size */
469 static void quirk_extend_bar_to_page(struct pci_dev *dev)
473 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
474 struct resource *r = &dev->resource[i];
476 if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {
477 r->end = PAGE_SIZE - 1;
479 r->flags |= IORESOURCE_UNSET;
480 pci_info(dev, "expanded BAR %d to page size: %pR\n",
485 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, 0x034a, quirk_extend_bar_to_page);
488 * S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
489 * If it's needed, re-allocate the region.
491 static void quirk_s3_64M(struct pci_dev *dev)
493 struct resource *r = &dev->resource[0];
495 if ((r->start & 0x3ffffff) || r->end != r->start + 0x3ffffff) {
496 r->flags |= IORESOURCE_UNSET;
501 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_868, quirk_s3_64M);
502 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_968, quirk_s3_64M);
504 static void quirk_io(struct pci_dev *dev, int pos, unsigned int size,
508 struct pci_bus_region bus_region;
509 struct resource *res = dev->resource + pos;
511 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + (pos << 2), ®ion);
516 res->name = pci_name(dev);
517 res->flags = region & ~PCI_BASE_ADDRESS_IO_MASK;
519 (IORESOURCE_IO | IORESOURCE_PCI_FIXED | IORESOURCE_SIZEALIGN);
520 region &= ~(size - 1);
522 /* Convert from PCI bus to resource space */
523 bus_region.start = region;
524 bus_region.end = region + size - 1;
525 pcibios_bus_to_resource(dev->bus, res, &bus_region);
527 pci_info(dev, FW_BUG "%s quirk: reg 0x%x: %pR\n",
528 name, PCI_BASE_ADDRESS_0 + (pos << 2), res);
532 * Some CS5536 BIOSes (for example, the Soekris NET5501 board w/ comBIOS
533 * ver. 1.33 20070103) don't set the correct ISA PCI region header info.
534 * BAR0 should be 8 bytes; instead, it may be set to something like 8k
535 * (which conflicts w/ BAR1's memory range).
537 * CS553x's ISA PCI BARs may also be read-only (ref:
538 * https://bugzilla.kernel.org/show_bug.cgi?id=85991 - Comment #4 forward).
540 static void quirk_cs5536_vsa(struct pci_dev *dev)
542 static char *name = "CS5536 ISA bridge";
544 if (pci_resource_len(dev, 0) != 8) {
545 quirk_io(dev, 0, 8, name); /* SMB */
546 quirk_io(dev, 1, 256, name); /* GPIO */
547 quirk_io(dev, 2, 64, name); /* MFGPT */
548 pci_info(dev, "%s bug detected (incorrect header); workaround applied\n",
552 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, quirk_cs5536_vsa);
554 static void quirk_io_region(struct pci_dev *dev, int port,
555 unsigned int size, int nr, const char *name)
558 struct pci_bus_region bus_region;
559 struct resource *res = dev->resource + nr;
561 pci_read_config_word(dev, port, ®ion);
562 region &= ~(size - 1);
567 res->name = pci_name(dev);
568 res->flags = IORESOURCE_IO;
570 /* Convert from PCI bus to resource space */
571 bus_region.start = region;
572 bus_region.end = region + size - 1;
573 pcibios_bus_to_resource(dev->bus, res, &bus_region);
575 if (!pci_claim_resource(dev, nr))
576 pci_info(dev, "quirk: %pR claimed by %s\n", res, name);
580 * ATI Northbridge setups MCE the processor if you even read somewhere
581 * between 0x3b0->0x3bb or read 0x3d3
583 static void quirk_ati_exploding_mce(struct pci_dev *dev)
585 pci_info(dev, "ATI Northbridge, reserving I/O ports 0x3b0 to 0x3bb\n");
586 /* Mae rhaid i ni beidio ag edrych ar y lleoliadiau I/O hyn */
587 request_region(0x3b0, 0x0C, "RadeonIGP");
588 request_region(0x3d3, 0x01, "RadeonIGP");
590 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_exploding_mce);
593 * In the AMD NL platform, this device ([1022:7912]) has a class code of
594 * PCI_CLASS_SERIAL_USB_XHCI (0x0c0330), which means the xhci driver will
597 * But the dwc3 driver is a more specific driver for this device, and we'd
598 * prefer to use it instead of xhci. To prevent xhci from claiming the
599 * device, change the class code to 0x0c03fe, which the PCI r3.0 spec
600 * defines as "USB device (not host controller)". The dwc3 driver can then
601 * claim it based on its Vendor and Device ID.
603 static void quirk_amd_nl_class(struct pci_dev *pdev)
605 u32 class = pdev->class;
607 /* Use "USB Device (not host controller)" class */
608 pdev->class = PCI_CLASS_SERIAL_USB_DEVICE;
609 pci_info(pdev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n",
612 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,
616 * Synopsys USB 3.x host HAPS platform has a class code of
617 * PCI_CLASS_SERIAL_USB_XHCI, and xhci driver can claim it. However, these
618 * devices should use dwc3-haps driver. Change these devices' class code to
619 * PCI_CLASS_SERIAL_USB_DEVICE to prevent the xhci-pci driver from claiming
622 static void quirk_synopsys_haps(struct pci_dev *pdev)
624 u32 class = pdev->class;
626 switch (pdev->device) {
627 case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3:
628 case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI:
629 case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31:
630 pdev->class = PCI_CLASS_SERIAL_USB_DEVICE;
631 pci_info(pdev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n",
636 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_ANY_ID,
637 PCI_CLASS_SERIAL_USB_XHCI, 0,
638 quirk_synopsys_haps);
641 * Let's make the southbridge information explicit instead of having to
642 * worry about people probing the ACPI areas, for example.. (Yes, it
643 * happens, and if you read the wrong ACPI register it will put the machine
644 * to sleep with no way of waking it up again. Bummer).
646 * ALI M7101: Two IO regions pointed to by words at
647 * 0xE0 (64 bytes of ACPI registers)
648 * 0xE2 (32 bytes of SMB registers)
650 static void quirk_ali7101_acpi(struct pci_dev *dev)
652 quirk_io_region(dev, 0xE0, 64, PCI_BRIDGE_RESOURCES, "ali7101 ACPI");
653 quirk_io_region(dev, 0xE2, 32, PCI_BRIDGE_RESOURCES+1, "ali7101 SMB");
655 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, quirk_ali7101_acpi);
657 static void piix4_io_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
660 u32 mask, size, base;
662 pci_read_config_dword(dev, port, &devres);
663 if ((devres & enable) != enable)
665 mask = (devres >> 16) & 15;
666 base = devres & 0xffff;
669 unsigned int bit = size >> 1;
670 if ((bit & mask) == bit)
675 * For now we only print it out. Eventually we'll want to
676 * reserve it (at least if it's in the 0x1000+ range), but
677 * let's get enough confirmation reports first.
680 pci_info(dev, "%s PIO at %04x-%04x\n", name, base, base + size - 1);
683 static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
686 u32 mask, size, base;
688 pci_read_config_dword(dev, port, &devres);
689 if ((devres & enable) != enable)
691 base = devres & 0xffff0000;
692 mask = (devres & 0x3f) << 16;
695 unsigned int bit = size >> 1;
696 if ((bit & mask) == bit)
702 * For now we only print it out. Eventually we'll want to
703 * reserve it, but let's get enough confirmation reports first.
706 pci_info(dev, "%s MMIO at %04x-%04x\n", name, base, base + size - 1);
710 * PIIX4 ACPI: Two IO regions pointed to by longwords at
711 * 0x40 (64 bytes of ACPI registers)
712 * 0x90 (16 bytes of SMB registers)
713 * and a few strange programmable PIIX4 device resources.
715 static void quirk_piix4_acpi(struct pci_dev *dev)
719 quirk_io_region(dev, 0x40, 64, PCI_BRIDGE_RESOURCES, "PIIX4 ACPI");
720 quirk_io_region(dev, 0x90, 16, PCI_BRIDGE_RESOURCES+1, "PIIX4 SMB");
722 /* Device resource A has enables for some of the other ones */
723 pci_read_config_dword(dev, 0x5c, &res_a);
725 piix4_io_quirk(dev, "PIIX4 devres B", 0x60, 3 << 21);
726 piix4_io_quirk(dev, "PIIX4 devres C", 0x64, 3 << 21);
728 /* Device resource D is just bitfields for static resources */
730 /* Device 12 enabled? */
731 if (res_a & (1 << 29)) {
732 piix4_io_quirk(dev, "PIIX4 devres E", 0x68, 1 << 20);
733 piix4_mem_quirk(dev, "PIIX4 devres F", 0x6c, 1 << 7);
735 /* Device 13 enabled? */
736 if (res_a & (1 << 30)) {
737 piix4_io_quirk(dev, "PIIX4 devres G", 0x70, 1 << 20);
738 piix4_mem_quirk(dev, "PIIX4 devres H", 0x74, 1 << 7);
740 piix4_io_quirk(dev, "PIIX4 devres I", 0x78, 1 << 20);
741 piix4_io_quirk(dev, "PIIX4 devres J", 0x7c, 1 << 20);
743 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, quirk_piix4_acpi);
744 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3, quirk_piix4_acpi);
746 #define ICH_PMBASE 0x40
747 #define ICH_ACPI_CNTL 0x44
748 #define ICH4_ACPI_EN 0x10
749 #define ICH6_ACPI_EN 0x80
750 #define ICH4_GPIOBASE 0x58
751 #define ICH4_GPIO_CNTL 0x5c
752 #define ICH4_GPIO_EN 0x10
753 #define ICH6_GPIOBASE 0x48
754 #define ICH6_GPIO_CNTL 0x4c
755 #define ICH6_GPIO_EN 0x10
758 * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
759 * 0x40 (128 bytes of ACPI, GPIO & TCO registers)
760 * 0x58 (64 bytes of GPIO I/O space)
762 static void quirk_ich4_lpc_acpi(struct pci_dev *dev)
767 * The check for PCIBIOS_MIN_IO is to ensure we won't create a conflict
768 * with low legacy (and fixed) ports. We don't know the decoding
769 * priority and can't tell whether the legacy device or the one created
770 * here is really at that address. This happens on boards with broken
773 pci_read_config_byte(dev, ICH_ACPI_CNTL, &enable);
774 if (enable & ICH4_ACPI_EN)
775 quirk_io_region(dev, ICH_PMBASE, 128, PCI_BRIDGE_RESOURCES,
776 "ICH4 ACPI/GPIO/TCO");
778 pci_read_config_byte(dev, ICH4_GPIO_CNTL, &enable);
779 if (enable & ICH4_GPIO_EN)
780 quirk_io_region(dev, ICH4_GPIOBASE, 64, PCI_BRIDGE_RESOURCES+1,
783 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, quirk_ich4_lpc_acpi);
784 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, quirk_ich4_lpc_acpi);
785 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, quirk_ich4_lpc_acpi);
786 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, quirk_ich4_lpc_acpi);
787 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, quirk_ich4_lpc_acpi);
788 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, quirk_ich4_lpc_acpi);
789 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, quirk_ich4_lpc_acpi);
790 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, quirk_ich4_lpc_acpi);
791 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, quirk_ich4_lpc_acpi);
792 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, quirk_ich4_lpc_acpi);
794 static void ich6_lpc_acpi_gpio(struct pci_dev *dev)
798 pci_read_config_byte(dev, ICH_ACPI_CNTL, &enable);
799 if (enable & ICH6_ACPI_EN)
800 quirk_io_region(dev, ICH_PMBASE, 128, PCI_BRIDGE_RESOURCES,
801 "ICH6 ACPI/GPIO/TCO");
803 pci_read_config_byte(dev, ICH6_GPIO_CNTL, &enable);
804 if (enable & ICH6_GPIO_EN)
805 quirk_io_region(dev, ICH6_GPIOBASE, 64, PCI_BRIDGE_RESOURCES+1,
809 static void ich6_lpc_generic_decode(struct pci_dev *dev, unsigned int reg,
810 const char *name, int dynsize)
815 pci_read_config_dword(dev, reg, &val);
823 * This is not correct. It is 16, 32 or 64 bytes depending on
824 * register D31:F0:ADh bits 5:4.
826 * But this gets us at least _part_ of it.
835 * Just print it out for now. We should reserve it after more
838 pci_info(dev, "%s PIO at %04x-%04x\n", name, base, base+size-1);
841 static void quirk_ich6_lpc(struct pci_dev *dev)
843 /* Shared ACPI/GPIO decode with all ICH6+ */
844 ich6_lpc_acpi_gpio(dev);
846 /* ICH6-specific generic IO decode */
847 ich6_lpc_generic_decode(dev, 0x84, "LPC Generic IO decode 1", 0);
848 ich6_lpc_generic_decode(dev, 0x88, "LPC Generic IO decode 2", 1);
850 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0, quirk_ich6_lpc);
851 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, quirk_ich6_lpc);
853 static void ich7_lpc_generic_decode(struct pci_dev *dev, unsigned int reg,
859 pci_read_config_dword(dev, reg, &val);
865 /* IO base in bits 15:2, mask in bits 23:18, both are dword-based */
867 mask = (val >> 16) & 0xfc;
871 * Just print it out for now. We should reserve it after more
874 pci_info(dev, "%s PIO at %04x (mask %04x)\n", name, base, mask);
877 /* ICH7-10 has the same common LPC generic IO decode registers */
878 static void quirk_ich7_lpc(struct pci_dev *dev)
880 /* We share the common ACPI/GPIO decode with ICH6 */
881 ich6_lpc_acpi_gpio(dev);
883 /* And have 4 ICH7+ generic decodes */
884 ich7_lpc_generic_decode(dev, 0x84, "ICH7 LPC Generic IO decode 1");
885 ich7_lpc_generic_decode(dev, 0x88, "ICH7 LPC Generic IO decode 2");
886 ich7_lpc_generic_decode(dev, 0x8c, "ICH7 LPC Generic IO decode 3");
887 ich7_lpc_generic_decode(dev, 0x90, "ICH7 LPC Generic IO decode 4");
889 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0, quirk_ich7_lpc);
890 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1, quirk_ich7_lpc);
891 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, quirk_ich7_lpc);
892 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_0, quirk_ich7_lpc);
893 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_2, quirk_ich7_lpc);
894 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_3, quirk_ich7_lpc);
895 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1, quirk_ich7_lpc);
896 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4, quirk_ich7_lpc);
897 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_2, quirk_ich7_lpc);
898 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_4, quirk_ich7_lpc);
899 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7, quirk_ich7_lpc);
900 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_8, quirk_ich7_lpc);
901 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_1, quirk_ich7_lpc);
904 * VIA ACPI: One IO region pointed to by longword at
905 * 0x48 or 0x20 (256 bytes of ACPI registers)
907 static void quirk_vt82c586_acpi(struct pci_dev *dev)
909 if (dev->revision & 0x10)
910 quirk_io_region(dev, 0x48, 256, PCI_BRIDGE_RESOURCES,
913 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_vt82c586_acpi);
916 * VIA VT82C686 ACPI: Three IO region pointed to by (long)words at
917 * 0x48 (256 bytes of ACPI registers)
918 * 0x70 (128 bytes of hardware monitoring register)
919 * 0x90 (16 bytes of SMB registers)
921 static void quirk_vt82c686_acpi(struct pci_dev *dev)
923 quirk_vt82c586_acpi(dev);
925 quirk_io_region(dev, 0x70, 128, PCI_BRIDGE_RESOURCES+1,
928 quirk_io_region(dev, 0x90, 16, PCI_BRIDGE_RESOURCES+2, "vt82c686 SMB");
930 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_vt82c686_acpi);
933 * VIA VT8235 ISA Bridge: Two IO regions pointed to by words at
934 * 0x88 (128 bytes of power management registers)
935 * 0xd0 (16 bytes of SMB registers)
937 static void quirk_vt8235_acpi(struct pci_dev *dev)
939 quirk_io_region(dev, 0x88, 128, PCI_BRIDGE_RESOURCES, "vt8235 PM");
940 quirk_io_region(dev, 0xd0, 16, PCI_BRIDGE_RESOURCES+1, "vt8235 SMB");
942 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_vt8235_acpi);
945 * TI XIO2000a PCIe-PCI Bridge erroneously reports it supports fast
946 * back-to-back: Disable fast back-to-back on the secondary bus segment
948 static void quirk_xio2000a(struct pci_dev *dev)
950 struct pci_dev *pdev;
953 pci_warn(dev, "TI XIO2000a quirk detected; secondary bus fast back-to-back transfers disabled\n");
954 list_for_each_entry(pdev, &dev->subordinate->devices, bus_list) {
955 pci_read_config_word(pdev, PCI_COMMAND, &command);
956 if (command & PCI_COMMAND_FAST_BACK)
957 pci_write_config_word(pdev, PCI_COMMAND, command & ~PCI_COMMAND_FAST_BACK);
960 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XIO2000A,
963 #ifdef CONFIG_X86_IO_APIC
965 #include <asm/io_apic.h>
968 * VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
969 * devices to the external APIC.
971 * TODO: When we have device-specific interrupt routers, this code will go
974 static void quirk_via_ioapic(struct pci_dev *dev)
979 tmp = 0; /* nothing routed to external APIC */
981 tmp = 0x1f; /* all known bits (4-0) routed to external APIC */
983 pci_info(dev, "%sbling VIA external APIC routing\n",
984 tmp == 0 ? "Disa" : "Ena");
986 /* Offset 0x58: External APIC IRQ output control */
987 pci_write_config_byte(dev, 0x58, tmp);
989 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_ioapic);
990 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_ioapic);
993 * VIA 8237: Some BIOSes don't set the 'Bypass APIC De-Assert Message' Bit.
994 * This leads to doubled level interrupt rates.
995 * Set this bit to get rid of cycle wastage.
996 * Otherwise uncritical.
998 static void quirk_via_vt8237_bypass_apic_deassert(struct pci_dev *dev)
1001 #define BYPASS_APIC_DEASSERT 8
1003 pci_read_config_byte(dev, 0x5B, &misc_control2);
1004 if (!(misc_control2 & BYPASS_APIC_DEASSERT)) {
1005 pci_info(dev, "Bypassing VIA 8237 APIC De-Assert Message\n");
1006 pci_write_config_byte(dev, 0x5B, misc_control2|BYPASS_APIC_DEASSERT);
1009 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_vt8237_bypass_apic_deassert);
1010 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_vt8237_bypass_apic_deassert);
1013 * The AMD IO-APIC can hang the box when an APIC IRQ is masked.
1014 * We check all revs >= B0 (yet not in the pre production!) as the bug
1015 * is currently marked NoFix
1017 * We have multiple reports of hangs with this chipset that went away with
1018 * noapic specified. For the moment we assume it's the erratum. We may be wrong
1019 * of course. However the advice is demonstrably good even if so.
1021 static void quirk_amd_ioapic(struct pci_dev *dev)
1023 if (dev->revision >= 0x02) {
1024 pci_warn(dev, "I/O APIC: AMD Erratum #22 may be present. In the event of instability try\n");
1025 pci_warn(dev, " : booting with the \"noapic\" option\n");
1028 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, quirk_amd_ioapic);
1029 #endif /* CONFIG_X86_IO_APIC */
1031 #if defined(CONFIG_ARM64) && defined(CONFIG_PCI_ATS)
1033 static void quirk_cavium_sriov_rnm_link(struct pci_dev *dev)
1035 /* Fix for improper SR-IOV configuration on Cavium cn88xx RNM device */
1036 if (dev->subsystem_device == 0xa118)
1037 dev->sriov->link = dev->devfn;
1039 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CAVIUM, 0xa018, quirk_cavium_sriov_rnm_link);
1043 * Some settings of MMRBC can lead to data corruption so block changes.
1044 * See AMD 8131 HyperTransport PCI-X Tunnel Revision Guide
1046 static void quirk_amd_8131_mmrbc(struct pci_dev *dev)
1048 if (dev->subordinate && dev->revision <= 0x12) {
1049 pci_info(dev, "AMD8131 rev %x detected; disabling PCI-X MMRBC\n",
1051 dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MMRBC;
1054 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_amd_8131_mmrbc);
1057 * FIXME: it is questionable that quirk_via_acpi() is needed. It shows up
1058 * as an ISA bridge, and does not support the PCI_INTERRUPT_LINE register
1059 * at all. Therefore it seems like setting the pci_dev's IRQ to the value
1060 * of the ACPI SCI interrupt is only done for convenience.
1063 static void quirk_via_acpi(struct pci_dev *d)
1067 /* VIA ACPI device: SCI IRQ line in PCI config byte 0x42 */
1068 pci_read_config_byte(d, 0x42, &irq);
1070 if (irq && (irq != 2))
1073 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_acpi);
1074 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_acpi);
1076 /* VIA bridges which have VLink */
1077 static int via_vlink_dev_lo = -1, via_vlink_dev_hi = 18;
1079 static void quirk_via_bridge(struct pci_dev *dev)
1081 /* See what bridge we have and find the device ranges */
1082 switch (dev->device) {
1083 case PCI_DEVICE_ID_VIA_82C686:
1085 * The VT82C686 is special; it attaches to PCI and can have
1086 * any device number. All its subdevices are functions of
1087 * that single device.
1089 via_vlink_dev_lo = PCI_SLOT(dev->devfn);
1090 via_vlink_dev_hi = PCI_SLOT(dev->devfn);
1092 case PCI_DEVICE_ID_VIA_8237:
1093 case PCI_DEVICE_ID_VIA_8237A:
1094 via_vlink_dev_lo = 15;
1096 case PCI_DEVICE_ID_VIA_8235:
1097 via_vlink_dev_lo = 16;
1099 case PCI_DEVICE_ID_VIA_8231:
1100 case PCI_DEVICE_ID_VIA_8233_0:
1101 case PCI_DEVICE_ID_VIA_8233A:
1102 case PCI_DEVICE_ID_VIA_8233C_0:
1103 via_vlink_dev_lo = 17;
1107 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_bridge);
1108 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, quirk_via_bridge);
1109 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_0, quirk_via_bridge);
1110 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233A, quirk_via_bridge);
1111 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233C_0, quirk_via_bridge);
1112 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_via_bridge);
1113 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_bridge);
1114 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237A, quirk_via_bridge);
1117 * quirk_via_vlink - VIA VLink IRQ number update
1120 * If the device we are dealing with is on a PIC IRQ we need to ensure that
1121 * the IRQ line register which usually is not relevant for PCI cards, is
1122 * actually written so that interrupts get sent to the right place.
1124 * We only do this on systems where a VIA south bridge was detected, and
1125 * only for VIA devices on the motherboard (see quirk_via_bridge above).
1127 static void quirk_via_vlink(struct pci_dev *dev)
1131 /* Check if we have VLink at all */
1132 if (via_vlink_dev_lo == -1)
1137 /* Don't quirk interrupts outside the legacy IRQ range */
1138 if (!new_irq || new_irq > 15)
1141 /* Internal device ? */
1142 if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) > via_vlink_dev_hi ||
1143 PCI_SLOT(dev->devfn) < via_vlink_dev_lo)
1147 * This is an internal VLink device on a PIC interrupt. The BIOS
1148 * ought to have set this but may not have, so we redo it.
1150 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
1151 if (new_irq != irq) {
1152 pci_info(dev, "VIA VLink IRQ fixup, from %d to %d\n",
1154 udelay(15); /* unknown if delay really needed */
1155 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
1158 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_vlink);
1161 * VIA VT82C598 has its device ID settable and many BIOSes set it to the ID
1162 * of VT82C597 for backward compatibility. We need to switch it off to be
1163 * able to recognize the real type of the chip.
1165 static void quirk_vt82c598_id(struct pci_dev *dev)
1167 pci_write_config_byte(dev, 0xfc, 0);
1168 pci_read_config_word(dev, PCI_DEVICE_ID, &dev->device);
1170 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id);
1173 * CardBus controllers have a legacy base address that enables them to
1174 * respond as i82365 pcmcia controllers. We don't want them to do this
1175 * even if the Linux CardBus driver is not loaded, because the Linux i82365
1176 * driver does not (and should not) handle CardBus.
1178 static void quirk_cardbus_legacy(struct pci_dev *dev)
1180 pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0);
1182 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
1183 PCI_CLASS_BRIDGE_CARDBUS, 8, quirk_cardbus_legacy);
1184 DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_ANY_ID, PCI_ANY_ID,
1185 PCI_CLASS_BRIDGE_CARDBUS, 8, quirk_cardbus_legacy);
1188 * Following the PCI ordering rules is optional on the AMD762. I'm not sure
1189 * what the designers were smoking but let's not inhale...
1191 * To be fair to AMD, it follows the spec by default, it's BIOS people who
1194 static void quirk_amd_ordering(struct pci_dev *dev)
1197 pci_read_config_dword(dev, 0x4C, &pcic);
1198 if ((pcic & 6) != 6) {
1200 pci_warn(dev, "BIOS failed to enable PCI standards compliance; fixing this error\n");
1201 pci_write_config_dword(dev, 0x4C, pcic);
1202 pci_read_config_dword(dev, 0x84, &pcic);
1203 pcic |= (1 << 23); /* Required in this mode */
1204 pci_write_config_dword(dev, 0x84, pcic);
1207 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering);
1208 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering);
1211 * DreamWorks-provided workaround for Dunord I-3000 problem
1213 * This card decodes and responds to addresses not apparently assigned to
1214 * it. We force a larger allocation to ensure that nothing gets put too
1217 static void quirk_dunord(struct pci_dev *dev)
1219 struct resource *r = &dev->resource[1];
1221 r->flags |= IORESOURCE_UNSET;
1225 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD, PCI_DEVICE_ID_DUNORD_I3000, quirk_dunord);
1228 * i82380FB mobile docking controller: its PCI-to-PCI bridge is subtractive
1229 * decoding (transparent), and does indicate this in the ProgIf.
1230 * Unfortunately, the ProgIf value is wrong - 0x80 instead of 0x01.
1232 static void quirk_transparent_bridge(struct pci_dev *dev)
1234 dev->transparent = 1;
1236 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82380FB, quirk_transparent_bridge);
1237 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA, 0x605, quirk_transparent_bridge);
1240 * Common misconfiguration of the MediaGX/Geode PCI master that will reduce
1241 * PCI bandwidth from 70MB/s to 25MB/s. See the GXM/GXLV/GX1 datasheets
1242 * found at http://www.national.com/analog for info on what these bits do.
1245 static void quirk_mediagx_master(struct pci_dev *dev)
1249 pci_read_config_byte(dev, 0x41, ®);
1252 pci_info(dev, "Fixup for MediaGX/Geode Slave Disconnect Boundary (0x41=0x%02x)\n",
1254 pci_write_config_byte(dev, 0x41, reg);
1257 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master);
1258 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master);
1261 * Ensure C0 rev restreaming is off. This is normally done by the BIOS but
1262 * in the odd case it is not the results are corruption hence the presence
1265 static void quirk_disable_pxb(struct pci_dev *pdev)
1269 if (pdev->revision != 0x04) /* Only C0 requires this */
1271 pci_read_config_word(pdev, 0x40, &config);
1272 if (config & (1<<6)) {
1274 pci_write_config_word(pdev, 0x40, config);
1275 pci_info(pdev, "C0 revision 450NX. Disabling PCI restreaming\n");
1278 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, quirk_disable_pxb);
1279 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, quirk_disable_pxb);
1281 static void quirk_amd_ide_mode(struct pci_dev *pdev)
1283 /* set SBX00/Hudson-2 SATA in IDE mode to AHCI mode */
1286 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &tmp);
1288 pci_read_config_byte(pdev, 0x40, &tmp);
1289 pci_write_config_byte(pdev, 0x40, tmp|1);
1290 pci_write_config_byte(pdev, 0x9, 1);
1291 pci_write_config_byte(pdev, 0xa, 6);
1292 pci_write_config_byte(pdev, 0x40, tmp);
1294 pdev->class = PCI_CLASS_STORAGE_SATA_AHCI;
1295 pci_info(pdev, "set SATA to AHCI mode\n");
1298 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
1299 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
1300 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
1301 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
1302 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SATA_IDE, quirk_amd_ide_mode);
1303 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SATA_IDE, quirk_amd_ide_mode);
1304 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);
1305 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);
1307 /* Serverworks CSB5 IDE does not fully support native mode */
1308 static void quirk_svwks_csb5ide(struct pci_dev *pdev)
1311 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
1315 pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
1316 /* PCI layer will sort out resources */
1319 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide);
1321 /* Intel 82801CAM ICH3-M datasheet says IDE modes must be the same */
1322 static void quirk_ide_samemode(struct pci_dev *pdev)
1326 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
1328 if (((prog & 1) && !(prog & 4)) || ((prog & 4) && !(prog & 1))) {
1329 pci_info(pdev, "IDE mode mismatch; forcing legacy mode\n");
1332 pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
1335 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);
1337 /* Some ATA devices break if put into D3 */
1338 static void quirk_no_ata_d3(struct pci_dev *pdev)
1340 pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
1342 /* Quirk the legacy ATA devices only. The AHCI ones are ok */
1343 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_ANY_ID,
1344 PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
1345 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
1346 PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
1347 /* ALi loses some register settings that we cannot then restore */
1348 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID,
1349 PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
1350 /* VIA comes back fine but we need to keep it alive or ACPI GTM failures
1351 occur when mode detecting */
1352 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_VIA, PCI_ANY_ID,
1353 PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
1356 * This was originally an Alpha-specific thing, but it really fits here.
1357 * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
1359 static void quirk_eisa_bridge(struct pci_dev *dev)
1361 dev->class = PCI_CLASS_BRIDGE_EISA << 8;
1363 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82375, quirk_eisa_bridge);
1366 * On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
1367 * is not activated. The myth is that Asus said that they do not want the
1368 * users to be irritated by just another PCI Device in the Win98 device
1369 * manager. (see the file prog/hotplug/README.p4b in the lm_sensors
1370 * package 2.7.0 for details)
1372 * The SMBus PCI Device can be activated by setting a bit in the ICH LPC
1373 * bridge. Unfortunately, this device has no subvendor/subdevice ID. So it
1374 * becomes necessary to do this tweak in two steps -- the chosen trigger
1375 * is either the Host bridge (preferred) or on-board VGA controller.
1377 * Note that we used to unhide the SMBus that way on Toshiba laptops
1378 * (Satellite A40 and Tecra M2) but then found that the thermal management
1379 * was done by SMM code, which could cause unsynchronized concurrent
1380 * accesses to the SMBus registers, with potentially bad effects. Thus you
1381 * should be very careful when adding new entries: if SMM is accessing the
1382 * Intel SMBus, this is a very good reason to leave it hidden.
1384 * Likewise, many recent laptops use ACPI for thermal management. If the
1385 * ACPI DSDT code accesses the SMBus, then Linux should not access it
1386 * natively, and keeping the SMBus hidden is the right thing to do. If you
1387 * are about to add an entry in the table below, please first disassemble
1388 * the DSDT and double-check that there is no code accessing the SMBus.
1390 static int asus_hides_smbus;
1392 static void asus_hides_smbus_hostbridge(struct pci_dev *dev)
1394 if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
1395 if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
1396 switch (dev->subsystem_device) {
1397 case 0x8025: /* P4B-LX */
1398 case 0x8070: /* P4B */
1399 case 0x8088: /* P4B533 */
1400 case 0x1626: /* L3C notebook */
1401 asus_hides_smbus = 1;
1403 else if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
1404 switch (dev->subsystem_device) {
1405 case 0x80b1: /* P4GE-V */
1406 case 0x80b2: /* P4PE */
1407 case 0x8093: /* P4B533-V */
1408 asus_hides_smbus = 1;
1410 else if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
1411 switch (dev->subsystem_device) {
1412 case 0x8030: /* P4T533 */
1413 asus_hides_smbus = 1;
1415 else if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
1416 switch (dev->subsystem_device) {
1417 case 0x8070: /* P4G8X Deluxe */
1418 asus_hides_smbus = 1;
1420 else if (dev->device == PCI_DEVICE_ID_INTEL_E7501_MCH)
1421 switch (dev->subsystem_device) {
1422 case 0x80c9: /* PU-DLS */
1423 asus_hides_smbus = 1;
1425 else if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
1426 switch (dev->subsystem_device) {
1427 case 0x1751: /* M2N notebook */
1428 case 0x1821: /* M5N notebook */
1429 case 0x1897: /* A6L notebook */
1430 asus_hides_smbus = 1;
1432 else if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
1433 switch (dev->subsystem_device) {
1434 case 0x184b: /* W1N notebook */
1435 case 0x186a: /* M6Ne notebook */
1436 asus_hides_smbus = 1;
1438 else if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
1439 switch (dev->subsystem_device) {
1440 case 0x80f2: /* P4P800-X */
1441 asus_hides_smbus = 1;
1443 else if (dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB)
1444 switch (dev->subsystem_device) {
1445 case 0x1882: /* M6V notebook */
1446 case 0x1977: /* A6VA notebook */
1447 asus_hides_smbus = 1;
1449 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
1450 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
1451 switch (dev->subsystem_device) {
1452 case 0x088C: /* HP Compaq nc8000 */
1453 case 0x0890: /* HP Compaq nc6000 */
1454 asus_hides_smbus = 1;
1456 else if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
1457 switch (dev->subsystem_device) {
1458 case 0x12bc: /* HP D330L */
1459 case 0x12bd: /* HP D530 */
1460 case 0x006a: /* HP Compaq nx9500 */
1461 asus_hides_smbus = 1;
1463 else if (dev->device == PCI_DEVICE_ID_INTEL_82875_HB)
1464 switch (dev->subsystem_device) {
1465 case 0x12bf: /* HP xw4100 */
1466 asus_hides_smbus = 1;
1468 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG)) {
1469 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
1470 switch (dev->subsystem_device) {
1471 case 0xC00C: /* Samsung P35 notebook */
1472 asus_hides_smbus = 1;
1474 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) {
1475 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
1476 switch (dev->subsystem_device) {
1477 case 0x0058: /* Compaq Evo N620c */
1478 asus_hides_smbus = 1;
1480 else if (dev->device == PCI_DEVICE_ID_INTEL_82810_IG3)
1481 switch (dev->subsystem_device) {
1482 case 0xB16C: /* Compaq Deskpro EP 401963-001 (PCA# 010174) */
1483 /* Motherboard doesn't have Host bridge
1484 * subvendor/subdevice IDs, therefore checking
1485 * its on-board VGA controller */
1486 asus_hides_smbus = 1;
1488 else if (dev->device == PCI_DEVICE_ID_INTEL_82801DB_2)
1489 switch (dev->subsystem_device) {
1490 case 0x00b8: /* Compaq Evo D510 CMT */
1491 case 0x00b9: /* Compaq Evo D510 SFF */
1492 case 0x00ba: /* Compaq Evo D510 USDT */
1493 /* Motherboard doesn't have Host bridge
1494 * subvendor/subdevice IDs and on-board VGA
1495 * controller is disabled if an AGP card is
1496 * inserted, therefore checking USB UHCI
1498 asus_hides_smbus = 1;
1500 else if (dev->device == PCI_DEVICE_ID_INTEL_82815_CGC)
1501 switch (dev->subsystem_device) {
1502 case 0x001A: /* Compaq Deskpro EN SSF P667 815E */
1503 /* Motherboard doesn't have host bridge
1504 * subvendor/subdevice IDs, therefore checking
1505 * its on-board VGA controller */
1506 asus_hides_smbus = 1;
1510 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge);
1511 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_HB, asus_hides_smbus_hostbridge);
1512 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82850_HB, asus_hides_smbus_hostbridge);
1513 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB, asus_hides_smbus_hostbridge);
1514 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82875_HB, asus_hides_smbus_hostbridge);
1515 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_7205_0, asus_hides_smbus_hostbridge);
1516 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7501_MCH, asus_hides_smbus_hostbridge);
1517 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855PM_HB, asus_hides_smbus_hostbridge);
1518 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855GM_HB, asus_hides_smbus_hostbridge);
1519 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82915GM_HB, asus_hides_smbus_hostbridge);
1521 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82810_IG3, asus_hides_smbus_hostbridge);
1522 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_2, asus_hides_smbus_hostbridge);
1523 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_CGC, asus_hides_smbus_hostbridge);
1525 static void asus_hides_smbus_lpc(struct pci_dev *dev)
1529 if (likely(!asus_hides_smbus))
1532 pci_read_config_word(dev, 0xF2, &val);
1534 pci_write_config_word(dev, 0xF2, val & (~0x8));
1535 pci_read_config_word(dev, 0xF2, &val);
1537 pci_info(dev, "i801 SMBus device continues to play 'hide and seek'! 0x%x\n",
1540 pci_info(dev, "Enabled i801 SMBus device\n");
1543 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, asus_hides_smbus_lpc);
1544 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc);
1545 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc);
1546 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, asus_hides_smbus_lpc);
1547 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, asus_hides_smbus_lpc);
1548 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc);
1549 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, asus_hides_smbus_lpc);
1550 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, asus_hides_smbus_lpc);
1551 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc);
1552 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc);
1553 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, asus_hides_smbus_lpc);
1554 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, asus_hides_smbus_lpc);
1555 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc);
1556 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, asus_hides_smbus_lpc);
1558 /* It appears we just have one such device. If not, we have a warning */
1559 static void __iomem *asus_rcba_base;
1560 static void asus_hides_smbus_lpc_ich6_suspend(struct pci_dev *dev)
1564 if (likely(!asus_hides_smbus))
1566 WARN_ON(asus_rcba_base);
1568 pci_read_config_dword(dev, 0xF0, &rcba);
1569 /* use bits 31:14, 16 kB aligned */
1570 asus_rcba_base = ioremap(rcba & 0xFFFFC000, 0x4000);
1571 if (asus_rcba_base == NULL)
1575 static void asus_hides_smbus_lpc_ich6_resume_early(struct pci_dev *dev)
1579 if (likely(!asus_hides_smbus || !asus_rcba_base))
1582 /* read the Function Disable register, dword mode only */
1583 val = readl(asus_rcba_base + 0x3418);
1585 /* enable the SMBus device */
1586 writel(val & 0xFFFFFFF7, asus_rcba_base + 0x3418);
1589 static void asus_hides_smbus_lpc_ich6_resume(struct pci_dev *dev)
1591 if (likely(!asus_hides_smbus || !asus_rcba_base))
1594 iounmap(asus_rcba_base);
1595 asus_rcba_base = NULL;
1596 pci_info(dev, "Enabled ICH6/i801 SMBus device\n");
1599 static void asus_hides_smbus_lpc_ich6(struct pci_dev *dev)
1601 asus_hides_smbus_lpc_ich6_suspend(dev);
1602 asus_hides_smbus_lpc_ich6_resume_early(dev);
1603 asus_hides_smbus_lpc_ich6_resume(dev);
1605 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6);
1606 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6_suspend);
1607 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6_resume);
1608 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6_resume_early);
1610 /* SiS 96x south bridge: BIOS typically hides SMBus device... */
1611 static void quirk_sis_96x_smbus(struct pci_dev *dev)
1614 pci_read_config_byte(dev, 0x77, &val);
1616 pci_info(dev, "Enabling SiS 96x SMBus\n");
1617 pci_write_config_byte(dev, 0x77, val & ~0x10);
1620 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus);
1621 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus);
1622 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus);
1623 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus);
1624 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus);
1625 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus);
1626 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus);
1627 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus);
1630 * ... This is further complicated by the fact that some SiS96x south
1631 * bridges pretend to be 85C503/5513 instead. In that case see if we
1632 * spotted a compatible north bridge to make sure.
1633 * (pci_find_device() doesn't work yet)
1635 * We can also enable the sis96x bit in the discovery register..
1637 #define SIS_DETECT_REGISTER 0x40
1639 static void quirk_sis_503(struct pci_dev *dev)
1644 pci_read_config_byte(dev, SIS_DETECT_REGISTER, ®);
1645 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg | (1 << 6));
1646 pci_read_config_word(dev, PCI_DEVICE_ID, &devid);
1647 if (((devid & 0xfff0) != 0x0960) && (devid != 0x0018)) {
1648 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg);
1653 * Ok, it now shows up as a 96x. Run the 96x quirk by hand in case
1654 * it has already been processed. (Depends on link order, which is
1655 * apparently not guaranteed)
1657 dev->device = devid;
1658 quirk_sis_96x_smbus(dev);
1660 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503);
1661 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503);
1664 * On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
1665 * and MC97 modem controller are disabled when a second PCI soundcard is
1666 * present. This patch, tweaking the VT8237 ISA bridge, enables them.
1669 static void asus_hides_ac97_lpc(struct pci_dev *dev)
1672 int asus_hides_ac97 = 0;
1674 if (likely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
1675 if (dev->device == PCI_DEVICE_ID_VIA_8237)
1676 asus_hides_ac97 = 1;
1679 if (!asus_hides_ac97)
1682 pci_read_config_byte(dev, 0x50, &val);
1684 pci_write_config_byte(dev, 0x50, val & (~0xc0));
1685 pci_read_config_byte(dev, 0x50, &val);
1687 pci_info(dev, "Onboard AC97/MC97 devices continue to play 'hide and seek'! 0x%x\n",
1690 pci_info(dev, "Enabled onboard AC97/MC97 devices\n");
1693 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc);
1694 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc);
1696 #if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
1699 * If we are using libata we can drive this chip properly but must do this
1700 * early on to make the additional device appear during the PCI scanning.
1702 static void quirk_jmicron_ata(struct pci_dev *pdev)
1704 u32 conf1, conf5, class;
1707 /* Only poke fn 0 */
1708 if (PCI_FUNC(pdev->devfn))
1711 pci_read_config_dword(pdev, 0x40, &conf1);
1712 pci_read_config_dword(pdev, 0x80, &conf5);
1714 conf1 &= ~0x00CFF302; /* Clear bit 1, 8, 9, 12-19, 22, 23 */
1715 conf5 &= ~(1 << 24); /* Clear bit 24 */
1717 switch (pdev->device) {
1718 case PCI_DEVICE_ID_JMICRON_JMB360: /* SATA single port */
1719 case PCI_DEVICE_ID_JMICRON_JMB362: /* SATA dual ports */
1720 case PCI_DEVICE_ID_JMICRON_JMB364: /* SATA dual ports */
1721 /* The controller should be in single function ahci mode */
1722 conf1 |= 0x0002A100; /* Set 8, 13, 15, 17 */
1725 case PCI_DEVICE_ID_JMICRON_JMB365:
1726 case PCI_DEVICE_ID_JMICRON_JMB366:
1727 /* Redirect IDE second PATA port to the right spot */
1730 case PCI_DEVICE_ID_JMICRON_JMB361:
1731 case PCI_DEVICE_ID_JMICRON_JMB363:
1732 case PCI_DEVICE_ID_JMICRON_JMB369:
1733 /* Enable dual function mode, AHCI on fn 0, IDE fn1 */
1734 /* Set the class codes correctly and then direct IDE 0 */
1735 conf1 |= 0x00C2A1B3; /* Set 0, 1, 4, 5, 7, 8, 13, 15, 17, 22, 23 */
1738 case PCI_DEVICE_ID_JMICRON_JMB368:
1739 /* The controller should be in single function IDE mode */
1740 conf1 |= 0x00C00000; /* Set 22, 23 */
1744 pci_write_config_dword(pdev, 0x40, conf1);
1745 pci_write_config_dword(pdev, 0x80, conf5);
1747 /* Update pdev accordingly */
1748 pci_read_config_byte(pdev, PCI_HEADER_TYPE, &hdr);
1749 pdev->hdr_type = hdr & 0x7f;
1750 pdev->multifunction = !!(hdr & 0x80);
1752 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class);
1753 pdev->class = class >> 8;
1755 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
1756 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
1757 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
1758 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
1759 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB364, quirk_jmicron_ata);
1760 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
1761 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);
1762 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, quirk_jmicron_ata);
1763 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB369, quirk_jmicron_ata);
1764 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
1765 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
1766 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
1767 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
1768 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB364, quirk_jmicron_ata);
1769 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
1770 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);
1771 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, quirk_jmicron_ata);
1772 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB369, quirk_jmicron_ata);
1776 static void quirk_jmicron_async_suspend(struct pci_dev *dev)
1778 if (dev->multifunction) {
1779 device_disable_async_suspend(&dev->dev);
1780 pci_info(dev, "async suspend disabled to avoid multi-function power-on ordering issue\n");
1783 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE, 8, quirk_jmicron_async_suspend);
1784 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_CLASS_STORAGE_SATA_AHCI, 0, quirk_jmicron_async_suspend);
1785 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_JMICRON, 0x2362, quirk_jmicron_async_suspend);
1786 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_JMICRON, 0x236f, quirk_jmicron_async_suspend);
1788 #ifdef CONFIG_X86_IO_APIC
1789 static void quirk_alder_ioapic(struct pci_dev *pdev)
1793 if ((pdev->class >> 8) != 0xff00)
1797 * The first BAR is the location of the IO-APIC... we must
1798 * not touch this (and it's already covered by the fixmap), so
1799 * forcibly insert it into the resource tree.
1801 if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
1802 insert_resource(&iomem_resource, &pdev->resource[0]);
1805 * The next five BARs all seem to be rubbish, so just clean
1808 for (i = 1; i < PCI_STD_NUM_BARS; i++)
1809 memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
1811 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic);
1814 static void quirk_pcie_mch(struct pci_dev *pdev)
1818 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_pcie_mch);
1819 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch);
1820 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_pcie_mch);
1822 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, quirk_pcie_mch);
1825 * HiSilicon KunPeng920 and KunPeng930 have devices appear as PCI but are
1826 * actually on the AMBA bus. These fake PCI devices can support SVA via
1827 * SMMU stall feature, by setting dma-can-stall for ACPI platforms.
1829 * Normally stalling must not be enabled for PCI devices, since it would
1830 * break the PCI requirement for free-flowing writes and may lead to
1831 * deadlock. We expect PCI devices to support ATS and PRI if they want to
1832 * be fault-tolerant, so there's no ACPI binding to describe anything else,
1833 * even when a "PCI" device turns out to be a regular old SoC device
1834 * dressed up as a RCiEP and normal rules don't apply.
1836 static void quirk_huawei_pcie_sva(struct pci_dev *pdev)
1838 struct property_entry properties[] = {
1839 PROPERTY_ENTRY_BOOL("dma-can-stall"),
1843 if (pdev->revision != 0x21 && pdev->revision != 0x30)
1846 pdev->pasid_no_tlp = 1;
1849 * Set the dma-can-stall property on ACPI platforms. Device tree
1850 * can set it directly.
1852 if (!pdev->dev.of_node &&
1853 device_add_properties(&pdev->dev, properties))
1854 pci_warn(pdev, "could not add stall property");
1856 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa250, quirk_huawei_pcie_sva);
1857 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa251, quirk_huawei_pcie_sva);
1858 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa255, quirk_huawei_pcie_sva);
1859 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa256, quirk_huawei_pcie_sva);
1860 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa258, quirk_huawei_pcie_sva);
1861 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa259, quirk_huawei_pcie_sva);
1864 * It's possible for the MSI to get corrupted if SHPC and ACPI are used
1865 * together on certain PXH-based systems.
1867 static void quirk_pcie_pxh(struct pci_dev *dev)
1870 pci_warn(dev, "PXH quirk detected; SHPC device MSI disabled\n");
1872 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_0, quirk_pcie_pxh);
1873 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_1, quirk_pcie_pxh);
1874 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_pcie_pxh);
1875 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_pcie_pxh);
1876 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_pcie_pxh);
1879 * Some Intel PCI Express chipsets have trouble with downstream device
1882 static void quirk_intel_pcie_pm(struct pci_dev *dev)
1884 pci_pm_d3hot_delay = 120;
1887 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e2, quirk_intel_pcie_pm);
1888 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e3, quirk_intel_pcie_pm);
1889 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e4, quirk_intel_pcie_pm);
1890 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e5, quirk_intel_pcie_pm);
1891 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e6, quirk_intel_pcie_pm);
1892 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e7, quirk_intel_pcie_pm);
1893 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25f7, quirk_intel_pcie_pm);
1894 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25f8, quirk_intel_pcie_pm);
1895 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25f9, quirk_intel_pcie_pm);
1896 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25fa, quirk_intel_pcie_pm);
1897 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2601, quirk_intel_pcie_pm);
1898 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2602, quirk_intel_pcie_pm);
1899 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2603, quirk_intel_pcie_pm);
1900 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2604, quirk_intel_pcie_pm);
1901 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2605, quirk_intel_pcie_pm);
1902 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2606, quirk_intel_pcie_pm);
1903 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2607, quirk_intel_pcie_pm);
1904 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2608, quirk_intel_pcie_pm);
1905 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2609, quirk_intel_pcie_pm);
1906 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
1907 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);
1909 static void quirk_d3hot_delay(struct pci_dev *dev, unsigned int delay)
1911 if (dev->d3hot_delay >= delay)
1914 dev->d3hot_delay = delay;
1915 pci_info(dev, "extending delay after power-on from D3hot to %d msec\n",
1919 static void quirk_radeon_pm(struct pci_dev *dev)
1921 if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
1922 dev->subsystem_device == 0x00e2)
1923 quirk_d3hot_delay(dev, 20);
1925 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);
1928 * Ryzen5/7 XHCI controllers fail upon resume from runtime suspend or s2idle.
1929 * https://bugzilla.kernel.org/show_bug.cgi?id=205587
1931 * The kernel attempts to transition these devices to D3cold, but that seems
1932 * to be ineffective on the platforms in question; the PCI device appears to
1933 * remain on in D3hot state. The D3hot-to-D0 transition then requires an
1934 * extended delay in order to succeed.
1936 static void quirk_ryzen_xhci_d3hot(struct pci_dev *dev)
1938 quirk_d3hot_delay(dev, 20);
1940 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e0, quirk_ryzen_xhci_d3hot);
1941 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e1, quirk_ryzen_xhci_d3hot);
1942 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1639, quirk_ryzen_xhci_d3hot);
1944 #ifdef CONFIG_X86_IO_APIC
1945 static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
1947 noioapicreroute = 1;
1948 pr_info("%s detected: disable boot interrupt reroute\n", d->ident);
1953 static const struct dmi_system_id boot_interrupt_dmi_table[] = {
1955 * Systems to exclude from boot interrupt reroute quirks
1958 .callback = dmi_disable_ioapicreroute,
1959 .ident = "ASUSTek Computer INC. M2N-LR",
1961 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer INC."),
1962 DMI_MATCH(DMI_PRODUCT_NAME, "M2N-LR"),
1969 * Boot interrupts on some chipsets cannot be turned off. For these chipsets,
1970 * remap the original interrupt in the Linux kernel to the boot interrupt, so
1971 * that a PCI device's interrupt handler is installed on the boot interrupt
1974 static void quirk_reroute_to_boot_interrupts_intel(struct pci_dev *dev)
1976 dmi_check_system(boot_interrupt_dmi_table);
1977 if (noioapicquirk || noioapicreroute)
1980 dev->irq_reroute_variant = INTEL_IRQ_REROUTE_VARIANT;
1981 pci_info(dev, "rerouting interrupts for [%04x:%04x]\n",
1982 dev->vendor, dev->device);
1984 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80333_0, quirk_reroute_to_boot_interrupts_intel);
1985 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80333_1, quirk_reroute_to_boot_interrupts_intel);
1986 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0, quirk_reroute_to_boot_interrupts_intel);
1987 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_reroute_to_boot_interrupts_intel);
1988 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_reroute_to_boot_interrupts_intel);
1989 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_reroute_to_boot_interrupts_intel);
1990 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_0, quirk_reroute_to_boot_interrupts_intel);
1991 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_1, quirk_reroute_to_boot_interrupts_intel);
1992 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80333_0, quirk_reroute_to_boot_interrupts_intel);
1993 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80333_1, quirk_reroute_to_boot_interrupts_intel);
1994 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0, quirk_reroute_to_boot_interrupts_intel);
1995 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_reroute_to_boot_interrupts_intel);
1996 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_reroute_to_boot_interrupts_intel);
1997 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_reroute_to_boot_interrupts_intel);
1998 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_0, quirk_reroute_to_boot_interrupts_intel);
1999 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_1, quirk_reroute_to_boot_interrupts_intel);
2002 * On some chipsets we can disable the generation of legacy INTx boot
2007 * IO-APIC1 on 6300ESB generates boot interrupts, see Intel order no
2008 * 300641-004US, section 5.7.3.
2010 * Core IO on Xeon E5 1600/2600/4600, see Intel order no 326509-003.
2011 * Core IO on Xeon E5 v2, see Intel order no 329188-003.
2012 * Core IO on Xeon E7 v2, see Intel order no 329595-002.
2013 * Core IO on Xeon E5 v3, see Intel order no 330784-003.
2014 * Core IO on Xeon E7 v3, see Intel order no 332315-001US.
2015 * Core IO on Xeon E5 v4, see Intel order no 333810-002US.
2016 * Core IO on Xeon E7 v4, see Intel order no 332315-001US.
2017 * Core IO on Xeon D-1500, see Intel order no 332051-001.
2018 * Core IO on Xeon Scalable, see Intel order no 610950.
2020 #define INTEL_6300_IOAPIC_ABAR 0x40 /* Bus 0, Dev 29, Func 5 */
2021 #define INTEL_6300_DISABLE_BOOT_IRQ (1<<14)
2023 #define INTEL_CIPINTRC_CFG_OFFSET 0x14C /* Bus 0, Dev 5, Func 0 */
2024 #define INTEL_CIPINTRC_DIS_INTX_ICH (1<<25)
2026 static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
2028 u16 pci_config_word;
2029 u32 pci_config_dword;
2034 switch (dev->device) {
2035 case PCI_DEVICE_ID_INTEL_ESB_10:
2036 pci_read_config_word(dev, INTEL_6300_IOAPIC_ABAR,
2038 pci_config_word |= INTEL_6300_DISABLE_BOOT_IRQ;
2039 pci_write_config_word(dev, INTEL_6300_IOAPIC_ABAR,
2042 case 0x3c28: /* Xeon E5 1600/2600/4600 */
2043 case 0x0e28: /* Xeon E5/E7 V2 */
2044 case 0x2f28: /* Xeon E5/E7 V3,V4 */
2045 case 0x6f28: /* Xeon D-1500 */
2046 case 0x2034: /* Xeon Scalable Family */
2047 pci_read_config_dword(dev, INTEL_CIPINTRC_CFG_OFFSET,
2049 pci_config_dword |= INTEL_CIPINTRC_DIS_INTX_ICH;
2050 pci_write_config_dword(dev, INTEL_CIPINTRC_CFG_OFFSET,
2056 pci_info(dev, "disabled boot interrupts on device [%04x:%04x]\n",
2057 dev->vendor, dev->device);
2060 * Device 29 Func 5 Device IDs of IO-APIC
2061 * containing ABAR—APIC1 Alternate Base Address Register
2063 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10,
2064 quirk_disable_intel_boot_interrupt);
2065 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10,
2066 quirk_disable_intel_boot_interrupt);
2069 * Device 5 Func 0 Device IDs of Core IO modules/hubs
2070 * containing Coherent Interface Protocol Interrupt Control
2072 * Device IDs obtained from volume 2 datasheets of commented
2075 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x3c28,
2076 quirk_disable_intel_boot_interrupt);
2077 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0e28,
2078 quirk_disable_intel_boot_interrupt);
2079 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2f28,
2080 quirk_disable_intel_boot_interrupt);
2081 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x6f28,
2082 quirk_disable_intel_boot_interrupt);
2083 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2034,
2084 quirk_disable_intel_boot_interrupt);
2085 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x3c28,
2086 quirk_disable_intel_boot_interrupt);
2087 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x0e28,
2088 quirk_disable_intel_boot_interrupt);
2089 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x2f28,
2090 quirk_disable_intel_boot_interrupt);
2091 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x6f28,
2092 quirk_disable_intel_boot_interrupt);
2093 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x2034,
2094 quirk_disable_intel_boot_interrupt);
2096 /* Disable boot interrupts on HT-1000 */
2097 #define BC_HT1000_FEATURE_REG 0x64
2098 #define BC_HT1000_PIC_REGS_ENABLE (1<<0)
2099 #define BC_HT1000_MAP_IDX 0xC00
2100 #define BC_HT1000_MAP_DATA 0xC01
2102 static void quirk_disable_broadcom_boot_interrupt(struct pci_dev *dev)
2104 u32 pci_config_dword;
2110 pci_read_config_dword(dev, BC_HT1000_FEATURE_REG, &pci_config_dword);
2111 pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword |
2112 BC_HT1000_PIC_REGS_ENABLE);
2114 for (irq = 0x10; irq < 0x10 + 32; irq++) {
2115 outb(irq, BC_HT1000_MAP_IDX);
2116 outb(0x00, BC_HT1000_MAP_DATA);
2119 pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword);
2121 pci_info(dev, "disabled boot interrupts on device [%04x:%04x]\n",
2122 dev->vendor, dev->device);
2124 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB, quirk_disable_broadcom_boot_interrupt);
2125 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB, quirk_disable_broadcom_boot_interrupt);
2127 /* Disable boot interrupts on AMD and ATI chipsets */
2130 * NOIOAMODE needs to be disabled to disable "boot interrupts". For AMD 8131
2131 * rev. A0 and B0, NOIOAMODE needs to be disabled anyway to fix IO-APIC mode
2132 * (due to an erratum).
2134 #define AMD_813X_MISC 0x40
2135 #define AMD_813X_NOIOAMODE (1<<0)
2136 #define AMD_813X_REV_B1 0x12
2137 #define AMD_813X_REV_B2 0x13
2139 static void quirk_disable_amd_813x_boot_interrupt(struct pci_dev *dev)
2141 u32 pci_config_dword;
2145 if ((dev->revision == AMD_813X_REV_B1) ||
2146 (dev->revision == AMD_813X_REV_B2))
2149 pci_read_config_dword(dev, AMD_813X_MISC, &pci_config_dword);
2150 pci_config_dword &= ~AMD_813X_NOIOAMODE;
2151 pci_write_config_dword(dev, AMD_813X_MISC, pci_config_dword);
2153 pci_info(dev, "disabled boot interrupts on device [%04x:%04x]\n",
2154 dev->vendor, dev->device);
2156 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
2157 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
2158 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
2159 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
2161 #define AMD_8111_PCI_IRQ_ROUTING 0x56
2163 static void quirk_disable_amd_8111_boot_interrupt(struct pci_dev *dev)
2165 u16 pci_config_word;
2170 pci_read_config_word(dev, AMD_8111_PCI_IRQ_ROUTING, &pci_config_word);
2171 if (!pci_config_word) {
2172 pci_info(dev, "boot interrupts on device [%04x:%04x] already disabled\n",
2173 dev->vendor, dev->device);
2176 pci_write_config_word(dev, AMD_8111_PCI_IRQ_ROUTING, 0);
2177 pci_info(dev, "disabled boot interrupts on device [%04x:%04x]\n",
2178 dev->vendor, dev->device);
2180 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS, quirk_disable_amd_8111_boot_interrupt);
2181 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS, quirk_disable_amd_8111_boot_interrupt);
2182 #endif /* CONFIG_X86_IO_APIC */
2185 * Toshiba TC86C001 IDE controller reports the standard 8-byte BAR0 size
2186 * but the PIO transfers won't work if BAR0 falls at the odd 8 bytes.
2187 * Re-allocate the region if needed...
2189 static void quirk_tc86c001_ide(struct pci_dev *dev)
2191 struct resource *r = &dev->resource[0];
2193 if (r->start & 0x8) {
2194 r->flags |= IORESOURCE_UNSET;
2199 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA_2,
2200 PCI_DEVICE_ID_TOSHIBA_TC86C001_IDE,
2201 quirk_tc86c001_ide);
2204 * PLX PCI 9050 PCI Target bridge controller has an erratum that prevents the
2205 * local configuration registers accessible via BAR0 (memory) or BAR1 (i/o)
2206 * being read correctly if bit 7 of the base address is set.
2207 * The BAR0 or BAR1 region may be disabled (size 0) or enabled (size 128).
2208 * Re-allocate the regions to a 256-byte boundary if necessary.
2210 static void quirk_plx_pci9050(struct pci_dev *dev)
2214 /* Fixed in revision 2 (PCI 9052). */
2215 if (dev->revision >= 2)
2217 for (bar = 0; bar <= 1; bar++)
2218 if (pci_resource_len(dev, bar) == 0x80 &&
2219 (pci_resource_start(dev, bar) & 0x80)) {
2220 struct resource *r = &dev->resource[bar];
2221 pci_info(dev, "Re-allocating PLX PCI 9050 BAR %u to length 256 to avoid bit 7 bug\n",
2223 r->flags |= IORESOURCE_UNSET;
2228 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2231 * The following Meilhaus (vendor ID 0x1402) device IDs (amongst others)
2232 * may be using the PLX PCI 9050: 0x0630, 0x0940, 0x0950, 0x0960, 0x100b,
2233 * 0x1400, 0x140a, 0x140b, 0x14e0, 0x14ea, 0x14eb, 0x1604, 0x1608, 0x160c,
2234 * 0x168f, 0x2000, 0x2600, 0x3000, 0x810a, 0x810b.
2236 * Currently, device IDs 0x2000 and 0x2600 are used by the Comedi "me_daq"
2239 DECLARE_PCI_FIXUP_HEADER(0x1402, 0x2000, quirk_plx_pci9050);
2240 DECLARE_PCI_FIXUP_HEADER(0x1402, 0x2600, quirk_plx_pci9050);
2242 static void quirk_netmos(struct pci_dev *dev)
2244 unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;
2245 unsigned int num_serial = dev->subsystem_device & 0xf;
2248 * These Netmos parts are multiport serial devices with optional
2249 * parallel ports. Even when parallel ports are present, they
2250 * are identified as class SERIAL, which means the serial driver
2251 * will claim them. To prevent this, mark them as class OTHER.
2252 * These combo devices should be claimed by parport_serial.
2254 * The subdevice ID is of the form 0x00PS, where <P> is the number
2255 * of parallel ports and <S> is the number of serial ports.
2257 switch (dev->device) {
2258 case PCI_DEVICE_ID_NETMOS_9835:
2259 /* Well, this rule doesn't hold for the following 9835 device */
2260 if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
2261 dev->subsystem_device == 0x0299)
2264 case PCI_DEVICE_ID_NETMOS_9735:
2265 case PCI_DEVICE_ID_NETMOS_9745:
2266 case PCI_DEVICE_ID_NETMOS_9845:
2267 case PCI_DEVICE_ID_NETMOS_9855:
2269 pci_info(dev, "Netmos %04x (%u parallel, %u serial); changing class SERIAL to OTHER (use parport_serial)\n",
2270 dev->device, num_parallel, num_serial);
2271 dev->class = (PCI_CLASS_COMMUNICATION_OTHER << 8) |
2272 (dev->class & 0xff);
2276 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID,
2277 PCI_CLASS_COMMUNICATION_SERIAL, 8, quirk_netmos);
2279 static void quirk_e100_interrupt(struct pci_dev *dev)
2285 switch (dev->device) {
2286 /* PCI IDs taken from drivers/net/e100.c */
2288 case 0x1030 ... 0x1034:
2289 case 0x1038 ... 0x103E:
2290 case 0x1050 ... 0x1057:
2292 case 0x1064 ... 0x106B:
2293 case 0x1091 ... 0x1095:
2306 * Some firmware hands off the e100 with interrupts enabled,
2307 * which can cause a flood of interrupts if packets are
2308 * received before the driver attaches to the device. So
2309 * disable all e100 interrupts here. The driver will
2310 * re-enable them when it's ready.
2312 pci_read_config_word(dev, PCI_COMMAND, &command);
2314 if (!(command & PCI_COMMAND_MEMORY) || !pci_resource_start(dev, 0))
2318 * Check that the device is in the D0 power state. If it's not,
2319 * there is no point to look any further.
2322 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
2323 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0)
2327 /* Convert from PCI bus to resource space. */
2328 csr = ioremap(pci_resource_start(dev, 0), 8);
2330 pci_warn(dev, "Can't map e100 registers\n");
2334 cmd_hi = readb(csr + 3);
2336 pci_warn(dev, "Firmware left e100 interrupts enabled; disabling\n");
2342 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
2343 PCI_CLASS_NETWORK_ETHERNET, 8, quirk_e100_interrupt);
2346 * The 82575 and 82598 may experience data corruption issues when transitioning
2347 * out of L0S. To prevent this we need to disable L0S on the PCIe link.
2349 static void quirk_disable_aspm_l0s(struct pci_dev *dev)
2351 pci_info(dev, "Disabling L0s\n");
2352 pci_disable_link_state(dev, PCIE_LINK_STATE_L0S);
2354 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10a7, quirk_disable_aspm_l0s);
2355 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10a9, quirk_disable_aspm_l0s);
2356 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10b6, quirk_disable_aspm_l0s);
2357 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c6, quirk_disable_aspm_l0s);
2358 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c7, quirk_disable_aspm_l0s);
2359 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c8, quirk_disable_aspm_l0s);
2360 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10d6, quirk_disable_aspm_l0s);
2361 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10db, quirk_disable_aspm_l0s);
2362 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10dd, quirk_disable_aspm_l0s);
2363 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10e1, quirk_disable_aspm_l0s);
2364 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10ec, quirk_disable_aspm_l0s);
2365 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10f1, quirk_disable_aspm_l0s);
2366 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10f4, quirk_disable_aspm_l0s);
2367 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1508, quirk_disable_aspm_l0s);
2369 static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev)
2371 pci_info(dev, "Disabling ASPM L0s/L1\n");
2372 pci_disable_link_state(dev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
2376 * ASM1083/1085 PCIe-PCI bridge devices cause AER timeout errors on the
2377 * upstream PCIe root port when ASPM is enabled. At least L0s mode is affected;
2378 * disable both L0s and L1 for now to be safe.
2380 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x1080, quirk_disable_aspm_l0s_l1);
2383 * Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain
2384 * Link bit cleared after starting the link retrain process to allow this
2385 * process to finish.
2387 * Affected devices: PI7C9X110, PI7C9X111SL, PI7C9X130. See also the
2388 * Pericom Errata Sheet PI7C9X111SLB_errata_rev1.2_102711.pdf.
2390 static void quirk_enable_clear_retrain_link(struct pci_dev *dev)
2392 dev->clear_retrain_link = 1;
2393 pci_info(dev, "Enable PCIe Retrain Link quirk\n");
2395 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PERICOM, 0xe110, quirk_enable_clear_retrain_link);
2396 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PERICOM, 0xe111, quirk_enable_clear_retrain_link);
2397 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PERICOM, 0xe130, quirk_enable_clear_retrain_link);
2399 static void fixup_rev1_53c810(struct pci_dev *dev)
2401 u32 class = dev->class;
2404 * rev 1 ncr53c810 chips don't set the class at all which means
2405 * they don't get their resources remapped. Fix that here.
2410 dev->class = PCI_CLASS_STORAGE_SCSI << 8;
2411 pci_info(dev, "NCR 53c810 rev 1 PCI class overridden (%#08x -> %#08x)\n",
2414 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810);
2416 /* Enable 1k I/O space granularity on the Intel P64H2 */
2417 static void quirk_p64h2_1k_io(struct pci_dev *dev)
2421 pci_read_config_word(dev, 0x40, &en1k);
2424 pci_info(dev, "Enable I/O Space to 1KB granularity\n");
2425 dev->io_window_1k = 1;
2428 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1460, quirk_p64h2_1k_io);
2431 * Under some circumstances, AER is not linked with extended capabilities.
2432 * Force it to be linked by setting the corresponding control bit in the
2435 static void quirk_nvidia_ck804_pcie_aer_ext_cap(struct pci_dev *dev)
2439 if (pci_read_config_byte(dev, 0xf41, &b) == 0) {
2441 pci_write_config_byte(dev, 0xf41, b | 0x20);
2442 pci_info(dev, "Linking AER extended capability\n");
2446 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
2447 quirk_nvidia_ck804_pcie_aer_ext_cap);
2448 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
2449 quirk_nvidia_ck804_pcie_aer_ext_cap);
2451 static void quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
2454 * Disable PCI Bus Parking and PCI Master read caching on CX700
2455 * which causes unspecified timing errors with a VT6212L on the PCI
2456 * bus leading to USB2.0 packet loss.
2458 * This quirk is only enabled if a second (on the external PCI bus)
2459 * VT6212L is found -- the CX700 core itself also contains a USB
2460 * host controller with the same PCI ID as the VT6212L.
2463 /* Count VT6212L instances */
2464 struct pci_dev *p = pci_get_device(PCI_VENDOR_ID_VIA,
2465 PCI_DEVICE_ID_VIA_8235_USB_2, NULL);
2469 * p should contain the first (internal) VT6212L -- see if we have
2470 * an external one by searching again.
2472 p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p);
2477 if (pci_read_config_byte(dev, 0x76, &b) == 0) {
2479 /* Turn off PCI Bus Parking */
2480 pci_write_config_byte(dev, 0x76, b ^ 0x40);
2482 pci_info(dev, "Disabling VIA CX700 PCI parking\n");
2486 if (pci_read_config_byte(dev, 0x72, &b) == 0) {
2488 /* Turn off PCI Master read caching */
2489 pci_write_config_byte(dev, 0x72, 0x0);
2491 /* Set PCI Master Bus time-out to "1x16 PCLK" */
2492 pci_write_config_byte(dev, 0x75, 0x1);
2494 /* Disable "Read FIFO Timer" */
2495 pci_write_config_byte(dev, 0x77, 0x0);
2497 pci_info(dev, "Disabling VIA CX700 PCI caching\n");
2501 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);
2503 static void quirk_brcm_5719_limit_mrrs(struct pci_dev *dev)
2507 pci_read_config_dword(dev, 0xf4, &rev);
2509 /* Only CAP the MRRS if the device is a 5719 A0 */
2510 if (rev == 0x05719000) {
2511 int readrq = pcie_get_readrq(dev);
2513 pcie_set_readrq(dev, 2048);
2516 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_BROADCOM,
2517 PCI_DEVICE_ID_TIGON3_5719,
2518 quirk_brcm_5719_limit_mrrs);
2521 * Originally in EDAC sources for i82875P: Intel tells BIOS developers to
2522 * hide device 6 which configures the overflow device access containing the
2523 * DRBs - this is where we expose device 6.
2524 * http://www.x86-secret.com/articles/tweak/pat/patsecrets-2.htm
2526 static void quirk_unhide_mch_dev6(struct pci_dev *dev)
2530 if (pci_read_config_byte(dev, 0xF4, ®) == 0 && !(reg & 0x02)) {
2531 pci_info(dev, "Enabling MCH 'Overflow' Device\n");
2532 pci_write_config_byte(dev, 0xF4, reg | 0x02);
2535 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB,
2536 quirk_unhide_mch_dev6);
2537 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82875_HB,
2538 quirk_unhide_mch_dev6);
2540 #ifdef CONFIG_PCI_MSI
2542 * Some chipsets do not support MSI. We cannot easily rely on setting
2543 * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually some
2544 * other buses controlled by the chipset even if Linux is not aware of it.
2545 * Instead of setting the flag on all buses in the machine, simply disable
2548 static void quirk_disable_all_msi(struct pci_dev *dev)
2551 pci_warn(dev, "MSI quirk detected; MSI disabled\n");
2553 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_disable_all_msi);
2554 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS400_200, quirk_disable_all_msi);
2555 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS480, quirk_disable_all_msi);
2556 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3336, quirk_disable_all_msi);
2557 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3351, quirk_disable_all_msi);
2558 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3364, quirk_disable_all_msi);
2559 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8380_0, quirk_disable_all_msi);
2560 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, 0x0761, quirk_disable_all_msi);
2561 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SAMSUNG, 0xa5e3, quirk_disable_all_msi);
2563 /* Disable MSI on chipsets that are known to not support it */
2564 static void quirk_disable_msi(struct pci_dev *dev)
2566 if (dev->subordinate) {
2567 pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n");
2568 dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
2571 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
2572 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
2573 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi);
2576 * The APC bridge device in AMD 780 family northbridges has some random
2577 * OEM subsystem ID in its vendor ID register (erratum 18), so instead
2578 * we use the possible vendor/device IDs of the host bridge for the
2579 * declared quirk, and search for the APC bridge by slot number.
2581 static void quirk_amd_780_apc_msi(struct pci_dev *host_bridge)
2583 struct pci_dev *apc_bridge;
2585 apc_bridge = pci_get_slot(host_bridge->bus, PCI_DEVFN(1, 0));
2587 if (apc_bridge->device == 0x9602)
2588 quirk_disable_msi(apc_bridge);
2589 pci_dev_put(apc_bridge);
2592 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9600, quirk_amd_780_apc_msi);
2593 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9601, quirk_amd_780_apc_msi);
2596 * Go through the list of HyperTransport capabilities and return 1 if a HT
2597 * MSI capability is found and enabled.
2599 static int msi_ht_cap_enabled(struct pci_dev *dev)
2601 int pos, ttl = PCI_FIND_CAP_TTL;
2603 pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
2604 while (pos && ttl--) {
2607 if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
2609 pci_info(dev, "Found %s HT MSI Mapping\n",
2610 flags & HT_MSI_FLAGS_ENABLE ?
2611 "enabled" : "disabled");
2612 return (flags & HT_MSI_FLAGS_ENABLE) != 0;
2615 pos = pci_find_next_ht_capability(dev, pos,
2616 HT_CAPTYPE_MSI_MAPPING);
2621 /* Check the HyperTransport MSI mapping to know whether MSI is enabled or not */
2622 static void quirk_msi_ht_cap(struct pci_dev *dev)
2624 if (!msi_ht_cap_enabled(dev))
2625 quirk_disable_msi(dev);
2627 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
2631 * The nVidia CK804 chipset may have 2 HT MSI mappings. MSI is supported
2632 * if the MSI capability is set in any of these mappings.
2634 static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
2636 struct pci_dev *pdev;
2639 * Check HT MSI cap on this chipset and the root one. A single one
2640 * having MSI is enough to be sure that MSI is supported.
2642 pdev = pci_get_slot(dev->bus, 0);
2645 if (!msi_ht_cap_enabled(pdev))
2646 quirk_msi_ht_cap(dev);
2649 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
2650 quirk_nvidia_ck804_msi_ht_cap);
2652 /* Force enable MSI mapping capability on HT bridges */
2653 static void ht_enable_msi_mapping(struct pci_dev *dev)
2655 int pos, ttl = PCI_FIND_CAP_TTL;
2657 pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
2658 while (pos && ttl--) {
2661 if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
2663 pci_info(dev, "Enabling HT MSI Mapping\n");
2665 pci_write_config_byte(dev, pos + HT_MSI_FLAGS,
2666 flags | HT_MSI_FLAGS_ENABLE);
2668 pos = pci_find_next_ht_capability(dev, pos,
2669 HT_CAPTYPE_MSI_MAPPING);
2672 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS,
2673 PCI_DEVICE_ID_SERVERWORKS_HT1000_PXB,
2674 ht_enable_msi_mapping);
2675 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE,
2676 ht_enable_msi_mapping);
2679 * The P5N32-SLI motherboards from Asus have a problem with MSI
2680 * for the MCP55 NIC. It is not yet determined whether the MSI problem
2681 * also affects other devices. As for now, turn off MSI for this device.
2683 static void nvenet_msi_disable(struct pci_dev *dev)
2685 const char *board_name = dmi_get_system_info(DMI_BOARD_NAME);
2688 (strstr(board_name, "P5N32-SLI PREMIUM") ||
2689 strstr(board_name, "P5N32-E SLI"))) {
2690 pci_info(dev, "Disabling MSI for MCP55 NIC on P5N32-SLI\n");
2694 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
2695 PCI_DEVICE_ID_NVIDIA_NVENET_15,
2696 nvenet_msi_disable);
2699 * PCIe spec r4.0 sec 7.7.1.2 and sec 7.7.2.2 say that if MSI/MSI-X is enabled,
2700 * then the device can't use INTx interrupts. Tegra's PCIe root ports don't
2701 * generate MSI interrupts for PME and AER events instead only INTx interrupts
2702 * are generated. Though Tegra's PCIe root ports can generate MSI interrupts
2703 * for other events, since PCIe specification doesn't support using a mix of
2704 * INTx and MSI/MSI-X, it is required to disable MSI interrupts to avoid port
2705 * service drivers registering their respective ISRs for MSIs.
2707 static void pci_quirk_nvidia_tegra_disable_rp_msi(struct pci_dev *dev)
2711 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad0,
2712 PCI_CLASS_BRIDGE_PCI, 8,
2713 pci_quirk_nvidia_tegra_disable_rp_msi);
2714 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad1,
2715 PCI_CLASS_BRIDGE_PCI, 8,
2716 pci_quirk_nvidia_tegra_disable_rp_msi);
2717 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad2,
2718 PCI_CLASS_BRIDGE_PCI, 8,
2719 pci_quirk_nvidia_tegra_disable_rp_msi);
2720 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf0,
2721 PCI_CLASS_BRIDGE_PCI, 8,
2722 pci_quirk_nvidia_tegra_disable_rp_msi);
2723 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1,
2724 PCI_CLASS_BRIDGE_PCI, 8,
2725 pci_quirk_nvidia_tegra_disable_rp_msi);
2726 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1c,
2727 PCI_CLASS_BRIDGE_PCI, 8,
2728 pci_quirk_nvidia_tegra_disable_rp_msi);
2729 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1d,
2730 PCI_CLASS_BRIDGE_PCI, 8,
2731 pci_quirk_nvidia_tegra_disable_rp_msi);
2732 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e12,
2733 PCI_CLASS_BRIDGE_PCI, 8,
2734 pci_quirk_nvidia_tegra_disable_rp_msi);
2735 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e13,
2736 PCI_CLASS_BRIDGE_PCI, 8,
2737 pci_quirk_nvidia_tegra_disable_rp_msi);
2738 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0fae,
2739 PCI_CLASS_BRIDGE_PCI, 8,
2740 pci_quirk_nvidia_tegra_disable_rp_msi);
2741 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0faf,
2742 PCI_CLASS_BRIDGE_PCI, 8,
2743 pci_quirk_nvidia_tegra_disable_rp_msi);
2744 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e5,
2745 PCI_CLASS_BRIDGE_PCI, 8,
2746 pci_quirk_nvidia_tegra_disable_rp_msi);
2747 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e6,
2748 PCI_CLASS_BRIDGE_PCI, 8,
2749 pci_quirk_nvidia_tegra_disable_rp_msi);
2752 * Some versions of the MCP55 bridge from Nvidia have a legacy IRQ routing
2753 * config register. This register controls the routing of legacy
2754 * interrupts from devices that route through the MCP55. If this register
2755 * is misprogrammed, interrupts are only sent to the BSP, unlike
2756 * conventional systems where the IRQ is broadcast to all online CPUs. Not
2757 * having this register set properly prevents kdump from booting up
2758 * properly, so let's make sure that we have it set correctly.
2759 * Note that this is an undocumented register.
2761 static void nvbridge_check_legacy_irq_routing(struct pci_dev *dev)
2765 if (!pci_find_capability(dev, PCI_CAP_ID_HT))
2768 pci_read_config_dword(dev, 0x74, &cfg);
2770 if (cfg & ((1 << 2) | (1 << 15))) {
2771 pr_info("Rewriting IRQ routing register on MCP55\n");
2772 cfg &= ~((1 << 2) | (1 << 15));
2773 pci_write_config_dword(dev, 0x74, cfg);
2776 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
2777 PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V0,
2778 nvbridge_check_legacy_irq_routing);
2779 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
2780 PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V4,
2781 nvbridge_check_legacy_irq_routing);
2783 static int ht_check_msi_mapping(struct pci_dev *dev)
2785 int pos, ttl = PCI_FIND_CAP_TTL;
2788 /* Check if there is HT MSI cap or enabled on this device */
2789 pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
2790 while (pos && ttl--) {
2795 if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
2797 if (flags & HT_MSI_FLAGS_ENABLE) {
2804 pos = pci_find_next_ht_capability(dev, pos,
2805 HT_CAPTYPE_MSI_MAPPING);
2811 static int host_bridge_with_leaf(struct pci_dev *host_bridge)
2813 struct pci_dev *dev;
2818 dev_no = host_bridge->devfn >> 3;
2819 for (i = dev_no + 1; i < 0x20; i++) {
2820 dev = pci_get_slot(host_bridge->bus, PCI_DEVFN(i, 0));
2824 /* found next host bridge? */
2825 pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
2831 if (ht_check_msi_mapping(dev)) {
2842 #define PCI_HT_CAP_SLAVE_CTRL0 4 /* link control */
2843 #define PCI_HT_CAP_SLAVE_CTRL1 8 /* link control to */
2845 static int is_end_of_ht_chain(struct pci_dev *dev)
2851 pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
2856 pci_read_config_word(dev, pos + PCI_CAP_FLAGS, &flags);
2858 ctrl_off = ((flags >> 10) & 1) ?
2859 PCI_HT_CAP_SLAVE_CTRL0 : PCI_HT_CAP_SLAVE_CTRL1;
2860 pci_read_config_word(dev, pos + ctrl_off, &ctrl);
2862 if (ctrl & (1 << 6))
2869 static void nv_ht_enable_msi_mapping(struct pci_dev *dev)
2871 struct pci_dev *host_bridge;
2876 dev_no = dev->devfn >> 3;
2877 for (i = dev_no; i >= 0; i--) {
2878 host_bridge = pci_get_slot(dev->bus, PCI_DEVFN(i, 0));
2882 pos = pci_find_ht_capability(host_bridge, HT_CAPTYPE_SLAVE);
2887 pci_dev_put(host_bridge);
2893 /* don't enable end_device/host_bridge with leaf directly here */
2894 if (host_bridge == dev && is_end_of_ht_chain(host_bridge) &&
2895 host_bridge_with_leaf(host_bridge))
2898 /* root did that ! */
2899 if (msi_ht_cap_enabled(host_bridge))
2902 ht_enable_msi_mapping(dev);
2905 pci_dev_put(host_bridge);
2908 static void ht_disable_msi_mapping(struct pci_dev *dev)
2910 int pos, ttl = PCI_FIND_CAP_TTL;
2912 pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
2913 while (pos && ttl--) {
2916 if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
2918 pci_info(dev, "Disabling HT MSI Mapping\n");
2920 pci_write_config_byte(dev, pos + HT_MSI_FLAGS,
2921 flags & ~HT_MSI_FLAGS_ENABLE);
2923 pos = pci_find_next_ht_capability(dev, pos,
2924 HT_CAPTYPE_MSI_MAPPING);
2928 static void __nv_msi_ht_cap_quirk(struct pci_dev *dev, int all)
2930 struct pci_dev *host_bridge;
2934 if (!pci_msi_enabled())
2937 /* check if there is HT MSI cap or enabled on this device */
2938 found = ht_check_msi_mapping(dev);
2945 * HT MSI mapping should be disabled on devices that are below
2946 * a non-Hypertransport host bridge. Locate the host bridge...
2948 host_bridge = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus), 0,
2950 if (host_bridge == NULL) {
2951 pci_warn(dev, "nv_msi_ht_cap_quirk didn't locate host bridge\n");
2955 pos = pci_find_ht_capability(host_bridge, HT_CAPTYPE_SLAVE);
2957 /* Host bridge is to HT */
2959 /* it is not enabled, try to enable it */
2961 ht_enable_msi_mapping(dev);
2963 nv_ht_enable_msi_mapping(dev);
2968 /* HT MSI is not enabled */
2972 /* Host bridge is not to HT, disable HT MSI mapping on this device */
2973 ht_disable_msi_mapping(dev);
2976 pci_dev_put(host_bridge);
2979 static void nv_msi_ht_cap_quirk_all(struct pci_dev *dev)
2981 return __nv_msi_ht_cap_quirk(dev, 1);
2983 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
2984 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
2986 static void nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
2988 return __nv_msi_ht_cap_quirk(dev, 0);
2990 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
2991 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
2993 static void quirk_msi_intx_disable_bug(struct pci_dev *dev)
2995 dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
2998 static void quirk_msi_intx_disable_ati_bug(struct pci_dev *dev)
3003 * SB700 MSI issue will be fixed at HW level from revision A21;
3004 * we need check PCI REVISION ID of SMBus controller to get SB700
3007 p = pci_get_device(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
3012 if ((p->revision < 0x3B) && (p->revision >= 0x30))
3013 dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
3017 static void quirk_msi_intx_disable_qca_bug(struct pci_dev *dev)
3019 /* AR816X/AR817X/E210X MSI is fixed at HW level from revision 0x18 */
3020 if (dev->revision < 0x18) {
3021 pci_info(dev, "set MSI_INTX_DISABLE_BUG flag\n");
3022 dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
3025 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3026 PCI_DEVICE_ID_TIGON3_5780,
3027 quirk_msi_intx_disable_bug);
3028 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3029 PCI_DEVICE_ID_TIGON3_5780S,
3030 quirk_msi_intx_disable_bug);
3031 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3032 PCI_DEVICE_ID_TIGON3_5714,
3033 quirk_msi_intx_disable_bug);
3034 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3035 PCI_DEVICE_ID_TIGON3_5714S,
3036 quirk_msi_intx_disable_bug);
3037 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3038 PCI_DEVICE_ID_TIGON3_5715,
3039 quirk_msi_intx_disable_bug);
3040 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
3041 PCI_DEVICE_ID_TIGON3_5715S,
3042 quirk_msi_intx_disable_bug);
3044 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4390,
3045 quirk_msi_intx_disable_ati_bug);
3046 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4391,
3047 quirk_msi_intx_disable_ati_bug);
3048 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4392,
3049 quirk_msi_intx_disable_ati_bug);
3050 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4393,
3051 quirk_msi_intx_disable_ati_bug);
3052 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4394,
3053 quirk_msi_intx_disable_ati_bug);
3055 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4373,
3056 quirk_msi_intx_disable_bug);
3057 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4374,
3058 quirk_msi_intx_disable_bug);
3059 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375,
3060 quirk_msi_intx_disable_bug);
3062 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1062,
3063 quirk_msi_intx_disable_bug);
3064 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1063,
3065 quirk_msi_intx_disable_bug);
3066 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x2060,
3067 quirk_msi_intx_disable_bug);
3068 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x2062,
3069 quirk_msi_intx_disable_bug);
3070 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1073,
3071 quirk_msi_intx_disable_bug);
3072 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1083,
3073 quirk_msi_intx_disable_bug);
3074 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1090,
3075 quirk_msi_intx_disable_qca_bug);
3076 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1091,
3077 quirk_msi_intx_disable_qca_bug);
3078 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x10a0,
3079 quirk_msi_intx_disable_qca_bug);
3080 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x10a1,
3081 quirk_msi_intx_disable_qca_bug);
3082 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0xe091,
3083 quirk_msi_intx_disable_qca_bug);
3086 * Amazon's Annapurna Labs 1c36:0031 Root Ports don't support MSI-X, so it
3087 * should be disabled on platforms where the device (mistakenly) advertises it.
3089 * Notice that this quirk also disables MSI (which may work, but hasn't been
3090 * tested), since currently there is no standard way to disable only MSI-X.
3092 * The 0031 device id is reused for other non Root Port device types,
3093 * therefore the quirk is registered for the PCI_CLASS_BRIDGE_PCI class.
3095 static void quirk_al_msi_disable(struct pci_dev *dev)
3098 pci_warn(dev, "Disabling MSI/MSI-X\n");
3100 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031,
3101 PCI_CLASS_BRIDGE_PCI, 8, quirk_al_msi_disable);
3102 #endif /* CONFIG_PCI_MSI */
3105 * Allow manual resource allocation for PCI hotplug bridges via
3106 * pci=hpmemsize=nnM and pci=hpiosize=nnM parameters. For some PCI-PCI
3107 * hotplug bridges, like PLX 6254 (former HINT HB6), kernel fails to
3108 * allocate resources when hotplug device is inserted and PCI bus is
3111 static void quirk_hotplug_bridge(struct pci_dev *dev)
3113 dev->is_hotplug_bridge = 1;
3115 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HINT, 0x0020, quirk_hotplug_bridge);
3118 * This is a quirk for the Ricoh MMC controller found as a part of some
3119 * multifunction chips.
3121 * This is very similar and based on the ricoh_mmc driver written by
3122 * Philip Langdale. Thank you for these magic sequences.
3124 * These chips implement the four main memory card controllers (SD, MMC,
3125 * MS, xD) and one or both of CardBus or FireWire.
3127 * It happens that they implement SD and MMC support as separate
3128 * controllers (and PCI functions). The Linux SDHCI driver supports MMC
3129 * cards but the chip detects MMC cards in hardware and directs them to the
3130 * MMC controller - so the SDHCI driver never sees them.
3132 * To get around this, we must disable the useless MMC controller. At that
3133 * point, the SDHCI controller will start seeing them. It seems to be the
3134 * case that the relevant PCI registers to deactivate the MMC controller
3135 * live on PCI function 0, which might be the CardBus controller or the
3136 * FireWire controller, depending on the particular chip in question
3138 * This has to be done early, because as soon as we disable the MMC controller
3139 * other PCI functions shift up one level, e.g. function #2 becomes function
3140 * #1, and this will confuse the PCI core.
3142 #ifdef CONFIG_MMC_RICOH_MMC
3143 static void ricoh_mmc_fixup_rl5c476(struct pci_dev *dev)
3150 * Disable via CardBus interface
3152 * This must be done via function #0
3154 if (PCI_FUNC(dev->devfn))
3157 pci_read_config_byte(dev, 0xB7, &disable);
3161 pci_read_config_byte(dev, 0x8E, &write_enable);
3162 pci_write_config_byte(dev, 0x8E, 0xAA);
3163 pci_read_config_byte(dev, 0x8D, &write_target);
3164 pci_write_config_byte(dev, 0x8D, 0xB7);
3165 pci_write_config_byte(dev, 0xB7, disable | 0x02);
3166 pci_write_config_byte(dev, 0x8E, write_enable);
3167 pci_write_config_byte(dev, 0x8D, write_target);
3169 pci_notice(dev, "proprietary Ricoh MMC controller disabled (via CardBus function)\n");
3170 pci_notice(dev, "MMC cards are now supported by standard SDHCI controller\n");
3172 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, ricoh_mmc_fixup_rl5c476);
3173 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, ricoh_mmc_fixup_rl5c476);
3175 static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
3181 * Disable via FireWire interface
3183 * This must be done via function #0
3185 if (PCI_FUNC(dev->devfn))
3188 * RICOH 0xe822 and 0xe823 SD/MMC card readers fail to recognize
3189 * certain types of SD/MMC cards. Lowering the SD base clock
3190 * frequency from 200Mhz to 50Mhz fixes this issue.
3192 * 0x150 - SD2.0 mode enable for changing base clock
3193 * frequency to 50Mhz
3194 * 0xe1 - Base clock frequency
3195 * 0x32 - 50Mhz new clock frequency
3196 * 0xf9 - Key register for 0x150
3197 * 0xfc - key register for 0xe1
3199 if (dev->device == PCI_DEVICE_ID_RICOH_R5CE822 ||
3200 dev->device == PCI_DEVICE_ID_RICOH_R5CE823) {
3201 pci_write_config_byte(dev, 0xf9, 0xfc);
3202 pci_write_config_byte(dev, 0x150, 0x10);
3203 pci_write_config_byte(dev, 0xf9, 0x00);
3204 pci_write_config_byte(dev, 0xfc, 0x01);
3205 pci_write_config_byte(dev, 0xe1, 0x32);
3206 pci_write_config_byte(dev, 0xfc, 0x00);
3208 pci_notice(dev, "MMC controller base frequency changed to 50Mhz.\n");
3211 pci_read_config_byte(dev, 0xCB, &disable);
3216 pci_read_config_byte(dev, 0xCA, &write_enable);
3217 pci_write_config_byte(dev, 0xCA, 0x57);
3218 pci_write_config_byte(dev, 0xCB, disable | 0x02);
3219 pci_write_config_byte(dev, 0xCA, write_enable);
3221 pci_notice(dev, "proprietary Ricoh MMC controller disabled (via FireWire function)\n");
3222 pci_notice(dev, "MMC cards are now supported by standard SDHCI controller\n");
3225 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
3226 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
3227 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);
3228 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);
3229 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);
3230 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);
3231 #endif /*CONFIG_MMC_RICOH_MMC*/
3233 #ifdef CONFIG_DMAR_TABLE
3234 #define VTUNCERRMSK_REG 0x1ac
3235 #define VTD_MSK_SPEC_ERRORS (1 << 31)
3237 * This is a quirk for masking VT-d spec-defined errors to platform error
3238 * handling logic. Without this, platforms using Intel 7500, 5500 chipsets
3239 * (and the derivative chipsets like X58 etc) seem to generate NMI/SMI (based
3240 * on the RAS config settings of the platform) when a VT-d fault happens.
3241 * The resulting SMI caused the system to hang.
3243 * VT-d spec-related errors are already handled by the VT-d OS code, so no
3244 * need to report the same error through other channels.
3246 static void vtd_mask_spec_errors(struct pci_dev *dev)
3250 pci_read_config_dword(dev, VTUNCERRMSK_REG, &word);
3251 pci_write_config_dword(dev, VTUNCERRMSK_REG, word | VTD_MSK_SPEC_ERRORS);
3253 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors);
3254 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
3257 static void fixup_ti816x_class(struct pci_dev *dev)
3259 u32 class = dev->class;
3261 /* TI 816x devices do not have class code set when in PCIe boot mode */
3262 dev->class = PCI_CLASS_MULTIMEDIA_VIDEO << 8;
3263 pci_info(dev, "PCI class overridden (%#08x -> %#08x)\n",
3266 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
3267 PCI_CLASS_NOT_DEFINED, 8, fixup_ti816x_class);
3270 * Some PCIe devices do not work reliably with the claimed maximum
3271 * payload size supported.
3273 static void fixup_mpss_256(struct pci_dev *dev)
3275 dev->pcie_mpss = 1; /* 256 bytes */
3277 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SOLARFLARE,
3278 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0, fixup_mpss_256);
3279 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SOLARFLARE,
3280 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_1, fixup_mpss_256);
3281 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SOLARFLARE,
3282 PCI_DEVICE_ID_SOLARFLARE_SFC4000B, fixup_mpss_256);
3283 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ASMEDIA, 0x0612, fixup_mpss_256);
3286 * Intel 5000 and 5100 Memory controllers have an erratum with read completion
3287 * coalescing (which is enabled by default on some BIOSes) and MPS of 256B.
3288 * Since there is no way of knowing what the PCIe MPS on each fabric will be
3289 * until all of the devices are discovered and buses walked, read completion
3290 * coalescing must be disabled. Unfortunately, it cannot be re-enabled because
3291 * it is possible to hotplug a device with MPS of 256B.
3293 static void quirk_intel_mc_errata(struct pci_dev *dev)
3298 if (pcie_bus_config == PCIE_BUS_TUNE_OFF ||
3299 pcie_bus_config == PCIE_BUS_DEFAULT)
3303 * Intel erratum specifies bits to change but does not say what
3304 * they are. Keeping them magical until such time as the registers
3305 * and values can be explained.
3307 err = pci_read_config_word(dev, 0x48, &rcc);
3309 pci_err(dev, "Error attempting to read the read completion coalescing register\n");
3313 if (!(rcc & (1 << 10)))
3318 err = pci_write_config_word(dev, 0x48, rcc);
3320 pci_err(dev, "Error attempting to write the read completion coalescing register\n");
3324 pr_info_once("Read completion coalescing disabled due to hardware erratum relating to 256B MPS\n");
3326 /* Intel 5000 series memory controllers and ports 2-7 */
3327 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25c0, quirk_intel_mc_errata);
3328 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d0, quirk_intel_mc_errata);
3329 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d4, quirk_intel_mc_errata);
3330 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d8, quirk_intel_mc_errata);
3331 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e2, quirk_intel_mc_errata);
3332 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e3, quirk_intel_mc_errata);
3333 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e4, quirk_intel_mc_errata);
3334 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e5, quirk_intel_mc_errata);
3335 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e6, quirk_intel_mc_errata);
3336 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e7, quirk_intel_mc_errata);
3337 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f7, quirk_intel_mc_errata);
3338 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f8, quirk_intel_mc_errata);
3339 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f9, quirk_intel_mc_errata);
3340 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25fa, quirk_intel_mc_errata);
3341 /* Intel 5100 series memory controllers and ports 2-7 */
3342 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65c0, quirk_intel_mc_errata);
3343 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e2, quirk_intel_mc_errata);
3344 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e3, quirk_intel_mc_errata);
3345 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e4, quirk_intel_mc_errata);
3346 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e5, quirk_intel_mc_errata);
3347 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e6, quirk_intel_mc_errata);
3348 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e7, quirk_intel_mc_errata);
3349 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f7, quirk_intel_mc_errata);
3350 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f8, quirk_intel_mc_errata);
3351 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f9, quirk_intel_mc_errata);
3352 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65fa, quirk_intel_mc_errata);
3355 * Ivytown NTB BAR sizes are misreported by the hardware due to an erratum.
3356 * To work around this, query the size it should be configured to by the
3357 * device and modify the resource end to correspond to this new size.
3359 static void quirk_intel_ntb(struct pci_dev *dev)
3364 rc = pci_read_config_byte(dev, 0x00D0, &val);
3368 dev->resource[2].end = dev->resource[2].start + ((u64) 1 << val) - 1;
3370 rc = pci_read_config_byte(dev, 0x00D1, &val);
3374 dev->resource[4].end = dev->resource[4].start + ((u64) 1 << val) - 1;
3376 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e08, quirk_intel_ntb);
3377 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e0d, quirk_intel_ntb);
3380 * Some BIOS implementations leave the Intel GPU interrupts enabled, even
3381 * though no one is handling them (e.g., if the i915 driver is never
3382 * loaded). Additionally the interrupt destination is not set up properly
3383 * and the interrupt ends up -somewhere-.
3385 * These spurious interrupts are "sticky" and the kernel disables the
3386 * (shared) interrupt line after 100,000+ generated interrupts.
3388 * Fix it by disabling the still enabled interrupts. This resolves crashes
3389 * often seen on monitor unplug.
3391 #define I915_DEIER_REG 0x4400c
3392 static void disable_igfx_irq(struct pci_dev *dev)
3394 void __iomem *regs = pci_iomap(dev, 0, 0);
3396 pci_warn(dev, "igfx quirk: Can't iomap PCI device\n");
3400 /* Check if any interrupt line is still enabled */
3401 if (readl(regs + I915_DEIER_REG) != 0) {
3402 pci_warn(dev, "BIOS left Intel GPU interrupts enabled; disabling\n");
3404 writel(0, regs + I915_DEIER_REG);
3407 pci_iounmap(dev, regs);
3409 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0042, disable_igfx_irq);
3410 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0046, disable_igfx_irq);
3411 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x004a, disable_igfx_irq);
3412 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
3413 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0106, disable_igfx_irq);
3414 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
3415 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0152, disable_igfx_irq);
3418 * PCI devices which are on Intel chips can skip the 10ms delay
3419 * before entering D3 mode.
3421 static void quirk_remove_d3hot_delay(struct pci_dev *dev)
3423 dev->d3hot_delay = 0;
3425 /* C600 Series devices do not need 10ms d3hot_delay */
3426 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0412, quirk_remove_d3hot_delay);
3427 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c00, quirk_remove_d3hot_delay);
3428 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c0c, quirk_remove_d3hot_delay);
3429 /* Lynxpoint-H PCH devices do not need 10ms d3hot_delay */
3430 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c02, quirk_remove_d3hot_delay);
3431 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c18, quirk_remove_d3hot_delay);
3432 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c1c, quirk_remove_d3hot_delay);
3433 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c20, quirk_remove_d3hot_delay);
3434 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c22, quirk_remove_d3hot_delay);
3435 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c26, quirk_remove_d3hot_delay);
3436 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c2d, quirk_remove_d3hot_delay);
3437 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c31, quirk_remove_d3hot_delay);
3438 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c3a, quirk_remove_d3hot_delay);
3439 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c3d, quirk_remove_d3hot_delay);
3440 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c4e, quirk_remove_d3hot_delay);
3441 /* Intel Cherrytrail devices do not need 10ms d3hot_delay */
3442 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2280, quirk_remove_d3hot_delay);
3443 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2298, quirk_remove_d3hot_delay);
3444 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x229c, quirk_remove_d3hot_delay);
3445 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b0, quirk_remove_d3hot_delay);
3446 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b5, quirk_remove_d3hot_delay);
3447 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b7, quirk_remove_d3hot_delay);
3448 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b8, quirk_remove_d3hot_delay);
3449 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22d8, quirk_remove_d3hot_delay);
3450 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22dc, quirk_remove_d3hot_delay);
3453 * Some devices may pass our check in pci_intx_mask_supported() if
3454 * PCI_COMMAND_INTX_DISABLE works though they actually do not properly
3455 * support this feature.
3457 static void quirk_broken_intx_masking(struct pci_dev *dev)
3459 dev->broken_intx_masking = 1;
3461 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x0030,
3462 quirk_broken_intx_masking);
3463 DECLARE_PCI_FIXUP_FINAL(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */
3464 quirk_broken_intx_masking);
3465 DECLARE_PCI_FIXUP_FINAL(0x1b7c, 0x0004, /* Ceton InfiniTV4 */
3466 quirk_broken_intx_masking);
3469 * Realtek RTL8169 PCI Gigabit Ethernet Controller (rev 10)
3470 * Subsystem: Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC
3472 * RTL8110SC - Fails under PCI device assignment using DisINTx masking.
3474 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, 0x8169,
3475 quirk_broken_intx_masking);
3478 * Intel i40e (XL710/X710) 10/20/40GbE NICs all have broken INTx masking,
3479 * DisINTx can be set but the interrupt status bit is non-functional.
3481 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1572, quirk_broken_intx_masking);
3482 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1574, quirk_broken_intx_masking);
3483 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1580, quirk_broken_intx_masking);
3484 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1581, quirk_broken_intx_masking);
3485 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1583, quirk_broken_intx_masking);
3486 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1584, quirk_broken_intx_masking);
3487 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1585, quirk_broken_intx_masking);
3488 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1586, quirk_broken_intx_masking);
3489 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1587, quirk_broken_intx_masking);
3490 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1588, quirk_broken_intx_masking);
3491 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1589, quirk_broken_intx_masking);
3492 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158a, quirk_broken_intx_masking);
3493 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158b, quirk_broken_intx_masking);
3494 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0, quirk_broken_intx_masking);
3495 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1, quirk_broken_intx_masking);
3496 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d2, quirk_broken_intx_masking);
3498 static u16 mellanox_broken_intx_devs[] = {
3499 PCI_DEVICE_ID_MELLANOX_HERMON_SDR,
3500 PCI_DEVICE_ID_MELLANOX_HERMON_DDR,
3501 PCI_DEVICE_ID_MELLANOX_HERMON_QDR,
3502 PCI_DEVICE_ID_MELLANOX_HERMON_DDR_GEN2,
3503 PCI_DEVICE_ID_MELLANOX_HERMON_QDR_GEN2,
3504 PCI_DEVICE_ID_MELLANOX_HERMON_EN,
3505 PCI_DEVICE_ID_MELLANOX_HERMON_EN_GEN2,
3506 PCI_DEVICE_ID_MELLANOX_CONNECTX_EN,
3507 PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_T_GEN2,
3508 PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_GEN2,
3509 PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_5_GEN2,
3510 PCI_DEVICE_ID_MELLANOX_CONNECTX2,
3511 PCI_DEVICE_ID_MELLANOX_CONNECTX3,
3512 PCI_DEVICE_ID_MELLANOX_CONNECTX3_PRO,
3515 #define CONNECTX_4_CURR_MAX_MINOR 99
3516 #define CONNECTX_4_INTX_SUPPORT_MINOR 14
3519 * Check ConnectX-4/LX FW version to see if it supports legacy interrupts.
3520 * If so, don't mark it as broken.
3521 * FW minor > 99 means older FW version format and no INTx masking support.
3522 * FW minor < 14 means new FW version format and no INTx masking support.
3524 static void mellanox_check_broken_intx_masking(struct pci_dev *pdev)
3526 __be32 __iomem *fw_ver;
3534 for (i = 0; i < ARRAY_SIZE(mellanox_broken_intx_devs); i++) {
3535 if (pdev->device == mellanox_broken_intx_devs[i]) {
3536 pdev->broken_intx_masking = 1;
3542 * Getting here means Connect-IB cards and up. Connect-IB has no INTx
3543 * support so shouldn't be checked further
3545 if (pdev->device == PCI_DEVICE_ID_MELLANOX_CONNECTIB)
3548 if (pdev->device != PCI_DEVICE_ID_MELLANOX_CONNECTX4 &&
3549 pdev->device != PCI_DEVICE_ID_MELLANOX_CONNECTX4_LX)
3552 /* For ConnectX-4 and ConnectX-4LX, need to check FW support */
3553 if (pci_enable_device_mem(pdev)) {
3554 pci_warn(pdev, "Can't enable device memory\n");
3558 fw_ver = ioremap(pci_resource_start(pdev, 0), 4);
3560 pci_warn(pdev, "Can't map ConnectX-4 initialization segment\n");
3564 /* Reading from resource space should be 32b aligned */
3565 fw_maj_min = ioread32be(fw_ver);
3566 fw_sub_min = ioread32be(fw_ver + 1);
3567 fw_major = fw_maj_min & 0xffff;
3568 fw_minor = fw_maj_min >> 16;
3569 fw_subminor = fw_sub_min & 0xffff;
3570 if (fw_minor > CONNECTX_4_CURR_MAX_MINOR ||
3571 fw_minor < CONNECTX_4_INTX_SUPPORT_MINOR) {
3572 pci_warn(pdev, "ConnectX-4: FW %u.%u.%u doesn't support INTx masking, disabling. Please upgrade FW to %d.14.1100 and up for INTx support\n",
3573 fw_major, fw_minor, fw_subminor, pdev->device ==
3574 PCI_DEVICE_ID_MELLANOX_CONNECTX4 ? 12 : 14);
3575 pdev->broken_intx_masking = 1;
3581 pci_disable_device(pdev);
3583 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_ANY_ID,
3584 mellanox_check_broken_intx_masking);
3586 static void quirk_no_bus_reset(struct pci_dev *dev)
3588 dev->dev_flags |= PCI_DEV_FLAGS_NO_BUS_RESET;
3592 * Some NVIDIA GPU devices do not work with bus reset, SBR needs to be
3593 * prevented for those affected devices.
3595 static void quirk_nvidia_no_bus_reset(struct pci_dev *dev)
3597 if ((dev->device & 0xffc0) == 0x2340)
3598 quirk_no_bus_reset(dev);
3600 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
3601 quirk_nvidia_no_bus_reset);
3604 * Some Atheros AR9xxx and QCA988x chips do not behave after a bus reset.
3605 * The device will throw a Link Down error on AER-capable systems and
3606 * regardless of AER, config space of the device is never accessible again
3607 * and typically causes the system to hang or reset when access is attempted.
3610 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0030, quirk_no_bus_reset);
3611 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset);
3612 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset);
3613 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset);
3614 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset);
3615 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003e, quirk_no_bus_reset);
3618 * Root port on some Cavium CN8xxx chips do not successfully complete a bus
3619 * reset when used with certain child devices. After the reset, config
3620 * accesses to the child may fail.
3622 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset);
3625 * Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS
3626 * automatically disables LTSSM when Secondary Bus Reset is received and
3627 * the device stops working. Prevent bus reset for these devices. With
3628 * this change, the device can be assigned to VMs with VFIO, but it will
3629 * leak state between VMs. Reference
3630 * https://e2e.ti.com/support/processors/f/791/t/954382
3632 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005, quirk_no_bus_reset);
3634 static void quirk_no_pm_reset(struct pci_dev *dev)
3637 * We can't do a bus reset on root bus devices, but an ineffective
3638 * PM reset may be better than nothing.
3640 if (!pci_is_root_bus(dev->bus))
3641 dev->dev_flags |= PCI_DEV_FLAGS_NO_PM_RESET;
3645 * Some AMD/ATI GPUS (HD8570 - Oland) report that a D3hot->D0 transition
3646 * causes a reset (i.e., they advertise NoSoftRst-). This transition seems
3647 * to have no effect on the device: it retains the framebuffer contents and
3648 * monitor sync. Advertising this support makes other layers, like VFIO,
3649 * assume pci_reset_function() is viable for this device. Mark it as
3650 * unavailable to skip it when testing reset methods.
3652 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
3653 PCI_CLASS_DISPLAY_VGA, 8, quirk_no_pm_reset);
3656 * Thunderbolt controllers with broken MSI hotplug signaling:
3657 * Entire 1st generation (Light Ridge, Eagle Ridge, Light Peak) and part
3658 * of the 2nd generation (Cactus Ridge 4C up to revision 1, Port Ridge).
3660 static void quirk_thunderbolt_hotplug_msi(struct pci_dev *pdev)
3662 if (pdev->is_hotplug_bridge &&
3663 (pdev->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C ||
3664 pdev->revision <= 1))
3667 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
3668 quirk_thunderbolt_hotplug_msi);
3669 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EAGLE_RIDGE,
3670 quirk_thunderbolt_hotplug_msi);
3671 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_PEAK,
3672 quirk_thunderbolt_hotplug_msi);
3673 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
3674 quirk_thunderbolt_hotplug_msi);
3675 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
3676 quirk_thunderbolt_hotplug_msi);
3680 * Apple: Shutdown Cactus Ridge Thunderbolt controller.
3682 * On Apple hardware the Cactus Ridge Thunderbolt controller needs to be
3683 * shutdown before suspend. Otherwise the native host interface (NHI) will not
3684 * be present after resume if a device was plugged in before suspend.
3686 * The Thunderbolt controller consists of a PCIe switch with downstream
3687 * bridges leading to the NHI and to the tunnel PCI bridges.
3689 * This quirk cuts power to the whole chip. Therefore we have to apply it
3690 * during suspend_noirq of the upstream bridge.
3692 * Power is automagically restored before resume. No action is needed.
3694 static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev)
3696 acpi_handle bridge, SXIO, SXFP, SXLV;
3698 if (!x86_apple_machine)
3700 if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM)
3704 * SXIO/SXFP/SXLF turns off power to the Thunderbolt controller.
3705 * We don't know how to turn it back on again, but firmware does,
3706 * so we can only use SXIO/SXFP/SXLF if we're suspending via
3709 if (!pm_suspend_via_firmware())
3712 bridge = ACPI_HANDLE(&dev->dev);
3717 * SXIO and SXLV are present only on machines requiring this quirk.
3718 * Thunderbolt bridges in external devices might have the same
3719 * device ID as those on the host, but they will not have the
3720 * associated ACPI methods. This implicitly checks that we are at
3723 if (ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXIO", &SXIO))
3724 || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXFP", &SXFP))
3725 || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXLV", &SXLV)))
3727 pci_info(dev, "quirk: cutting power to Thunderbolt controller...\n");
3729 /* magic sequence */
3730 acpi_execute_simple_method(SXIO, NULL, 1);
3731 acpi_execute_simple_method(SXFP, NULL, 0);
3733 acpi_execute_simple_method(SXLV, NULL, 0);
3734 acpi_execute_simple_method(SXIO, NULL, 0);
3735 acpi_execute_simple_method(SXLV, NULL, 0);
3737 DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL,
3738 PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
3739 quirk_apple_poweroff_thunderbolt);
3743 * Following are device-specific reset methods which can be used to
3744 * reset a single function if other methods (e.g. FLR, PM D0->D3) are
3747 static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, bool probe)
3750 * http://www.intel.com/content/dam/doc/datasheet/82599-10-gbe-controller-datasheet.pdf
3752 * The 82599 supports FLR on VFs, but FLR support is reported only
3753 * in the PF DEVCAP (sec 9.3.10.4), not in the VF DEVCAP (sec 9.5).
3754 * Thus we must call pcie_flr() directly without first checking if it is
3762 #define SOUTH_CHICKEN2 0xc2004
3763 #define PCH_PP_STATUS 0xc7200
3764 #define PCH_PP_CONTROL 0xc7204
3765 #define MSG_CTL 0x45010
3766 #define NSDE_PWR_STATE 0xd0100
3767 #define IGD_OPERATION_TIMEOUT 10000 /* set timeout 10 seconds */
3769 static int reset_ivb_igd(struct pci_dev *dev, bool probe)
3771 void __iomem *mmio_base;
3772 unsigned long timeout;
3778 mmio_base = pci_iomap(dev, 0, 0);
3782 iowrite32(0x00000002, mmio_base + MSG_CTL);
3785 * Clobbering SOUTH_CHICKEN2 register is fine only if the next
3786 * driver loaded sets the right bits. However, this's a reset and
3787 * the bits have been set by i915 previously, so we clobber
3788 * SOUTH_CHICKEN2 register directly here.
3790 iowrite32(0x00000005, mmio_base + SOUTH_CHICKEN2);
3792 val = ioread32(mmio_base + PCH_PP_CONTROL) & 0xfffffffe;
3793 iowrite32(val, mmio_base + PCH_PP_CONTROL);
3795 timeout = jiffies + msecs_to_jiffies(IGD_OPERATION_TIMEOUT);
3797 val = ioread32(mmio_base + PCH_PP_STATUS);
3798 if ((val & 0xb0000000) == 0)
3799 goto reset_complete;
3801 } while (time_before(jiffies, timeout));
3802 pci_warn(dev, "timeout during reset\n");
3805 iowrite32(0x00000002, mmio_base + NSDE_PWR_STATE);
3807 pci_iounmap(dev, mmio_base);
3811 /* Device-specific reset method for Chelsio T4-based adapters */
3812 static int reset_chelsio_generic_dev(struct pci_dev *dev, bool probe)
3818 * If this isn't a Chelsio T4-based device, return -ENOTTY indicating
3819 * that we have no device-specific reset method.
3821 if ((dev->device & 0xf000) != 0x4000)
3825 * If this is the "probe" phase, return 0 indicating that we can
3826 * reset this device.
3832 * T4 can wedge if there are DMAs in flight within the chip and Bus
3833 * Master has been disabled. We need to have it on till the Function
3834 * Level Reset completes. (BUS_MASTER is disabled in
3835 * pci_reset_function()).
3837 pci_read_config_word(dev, PCI_COMMAND, &old_command);
3838 pci_write_config_word(dev, PCI_COMMAND,
3839 old_command | PCI_COMMAND_MASTER);
3842 * Perform the actual device function reset, saving and restoring
3843 * configuration information around the reset.
3845 pci_save_state(dev);
3848 * T4 also suffers a Head-Of-Line blocking problem if MSI-X interrupts
3849 * are disabled when an MSI-X interrupt message needs to be delivered.
3850 * So we briefly re-enable MSI-X interrupts for the duration of the
3851 * FLR. The pci_restore_state() below will restore the original
3854 pci_read_config_word(dev, dev->msix_cap+PCI_MSIX_FLAGS, &msix_flags);
3855 if ((msix_flags & PCI_MSIX_FLAGS_ENABLE) == 0)
3856 pci_write_config_word(dev, dev->msix_cap+PCI_MSIX_FLAGS,
3858 PCI_MSIX_FLAGS_ENABLE |
3859 PCI_MSIX_FLAGS_MASKALL);
3864 * Restore the configuration information (BAR values, etc.) including
3865 * the original PCI Configuration Space Command word, and return
3868 pci_restore_state(dev);
3869 pci_write_config_word(dev, PCI_COMMAND, old_command);
3873 #define PCI_DEVICE_ID_INTEL_82599_SFP_VF 0x10ed
3874 #define PCI_DEVICE_ID_INTEL_IVB_M_VGA 0x0156
3875 #define PCI_DEVICE_ID_INTEL_IVB_M2_VGA 0x0166
3878 * The Samsung SM961/PM961 controller can sometimes enter a fatal state after
3879 * FLR where config space reads from the device return -1. We seem to be
3880 * able to avoid this condition if we disable the NVMe controller prior to
3881 * FLR. This quirk is generic for any NVMe class device requiring similar
3882 * assistance to quiesce the device prior to FLR.
3884 * NVMe specification: https://nvmexpress.org/resources/specifications/
3886 * Chapter 2: Required and optional PCI config registers
3887 * Chapter 3: NVMe control registers
3888 * Chapter 7.3: Reset behavior
3890 static int nvme_disable_and_flr(struct pci_dev *dev, bool probe)
3896 if (dev->class != PCI_CLASS_STORAGE_EXPRESS ||
3897 pcie_reset_flr(dev, PCI_RESET_PROBE) || !pci_resource_start(dev, 0))
3903 bar = pci_iomap(dev, 0, NVME_REG_CC + sizeof(cfg));
3907 pci_read_config_word(dev, PCI_COMMAND, &cmd);
3908 pci_write_config_word(dev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);
3910 cfg = readl(bar + NVME_REG_CC);
3912 /* Disable controller if enabled */
3913 if (cfg & NVME_CC_ENABLE) {
3914 u32 cap = readl(bar + NVME_REG_CAP);
3915 unsigned long timeout;
3918 * Per nvme_disable_ctrl() skip shutdown notification as it
3919 * could complete commands to the admin queue. We only intend
3920 * to quiesce the device before reset.
3922 cfg &= ~(NVME_CC_SHN_MASK | NVME_CC_ENABLE);
3924 writel(cfg, bar + NVME_REG_CC);
3927 * Some controllers require an additional delay here, see
3928 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY. None of those are yet
3929 * supported by this quirk.
3932 /* Cap register provides max timeout in 500ms increments */
3933 timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies;
3936 u32 status = readl(bar + NVME_REG_CSTS);
3938 /* Ready status becomes zero on disable complete */
3939 if (!(status & NVME_CSTS_RDY))
3944 if (time_after(jiffies, timeout)) {
3945 pci_warn(dev, "Timeout waiting for NVMe ready status to clear after disable\n");
3951 pci_iounmap(dev, bar);
3959 * Intel DC P3700 NVMe controller will timeout waiting for ready status
3960 * to change after NVMe enable if the driver starts interacting with the
3961 * device too soon after FLR. A 250ms delay after FLR has heuristically
3962 * proven to produce reliably working results for device assignment cases.
3964 static int delay_250ms_after_flr(struct pci_dev *dev, bool probe)
3967 return pcie_reset_flr(dev, PCI_RESET_PROBE);
3969 pcie_reset_flr(dev, PCI_RESET_DO_RESET);
3976 #define PCI_DEVICE_ID_HINIC_VF 0x375E
3977 #define HINIC_VF_FLR_TYPE 0x1000
3978 #define HINIC_VF_FLR_CAP_BIT (1UL << 30)
3979 #define HINIC_VF_OP 0xE80
3980 #define HINIC_VF_FLR_PROC_BIT (1UL << 18)
3981 #define HINIC_OPERATION_TIMEOUT 15000 /* 15 seconds */
3983 /* Device-specific reset method for Huawei Intelligent NIC virtual functions */
3984 static int reset_hinic_vf_dev(struct pci_dev *pdev, bool probe)
3986 unsigned long timeout;
3993 bar = pci_iomap(pdev, 0, 0);
3997 /* Get and check firmware capabilities */
3998 val = ioread32be(bar + HINIC_VF_FLR_TYPE);
3999 if (!(val & HINIC_VF_FLR_CAP_BIT)) {
4000 pci_iounmap(pdev, bar);
4004 /* Set HINIC_VF_FLR_PROC_BIT for the start of FLR */
4005 val = ioread32be(bar + HINIC_VF_OP);
4006 val = val | HINIC_VF_FLR_PROC_BIT;
4007 iowrite32be(val, bar + HINIC_VF_OP);
4012 * The device must recapture its Bus and Device Numbers after FLR
4013 * in order generate Completions. Issue a config write to let the
4014 * device capture this information.
4016 pci_write_config_word(pdev, PCI_VENDOR_ID, 0);
4018 /* Firmware clears HINIC_VF_FLR_PROC_BIT when reset is complete */
4019 timeout = jiffies + msecs_to_jiffies(HINIC_OPERATION_TIMEOUT);
4021 val = ioread32be(bar + HINIC_VF_OP);
4022 if (!(val & HINIC_VF_FLR_PROC_BIT))
4023 goto reset_complete;
4025 } while (time_before(jiffies, timeout));
4027 val = ioread32be(bar + HINIC_VF_OP);
4028 if (!(val & HINIC_VF_FLR_PROC_BIT))
4029 goto reset_complete;
4031 pci_warn(pdev, "Reset dev timeout, FLR ack reg: %#010x\n", val);
4034 pci_iounmap(pdev, bar);
4039 static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
4040 { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
4041 reset_intel_82599_sfp_virtfn },
4042 { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M_VGA,
4044 { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M2_VGA,
4046 { PCI_VENDOR_ID_SAMSUNG, 0xa804, nvme_disable_and_flr },
4047 { PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
4048 { PCI_VENDOR_ID_INTEL, 0x0a54, delay_250ms_after_flr },
4049 { PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
4050 reset_chelsio_generic_dev },
4051 { PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HINIC_VF,
4052 reset_hinic_vf_dev },
4057 * These device-specific reset methods are here rather than in a driver
4058 * because when a host assigns a device to a guest VM, the host may need
4059 * to reset the device but probably doesn't have a driver for it.
4061 int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
4063 const struct pci_dev_reset_methods *i;
4065 for (i = pci_dev_reset_methods; i->reset; i++) {
4066 if ((i->vendor == dev->vendor ||
4067 i->vendor == (u16)PCI_ANY_ID) &&
4068 (i->device == dev->device ||
4069 i->device == (u16)PCI_ANY_ID))
4070 return i->reset(dev, probe);
4076 static void quirk_dma_func0_alias(struct pci_dev *dev)
4078 if (PCI_FUNC(dev->devfn) != 0)
4079 pci_add_dma_alias(dev, PCI_DEVFN(PCI_SLOT(dev->devfn), 0), 1);
4083 * https://bugzilla.redhat.com/show_bug.cgi?id=605888
4085 * Some Ricoh devices use function 0 as the PCIe requester ID for DMA.
4087 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe832, quirk_dma_func0_alias);
4088 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe476, quirk_dma_func0_alias);
4090 static void quirk_dma_func1_alias(struct pci_dev *dev)
4092 if (PCI_FUNC(dev->devfn) != 1)
4093 pci_add_dma_alias(dev, PCI_DEVFN(PCI_SLOT(dev->devfn), 1), 1);
4097 * Marvell 88SE9123 uses function 1 as the requester ID for DMA. In some
4098 * SKUs function 1 is present and is a legacy IDE controller, in other
4099 * SKUs this function is not present, making this a ghost requester.
4100 * https://bugzilla.kernel.org/show_bug.cgi?id=42679
4102 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9120,
4103 quirk_dma_func1_alias);
4104 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9123,
4105 quirk_dma_func1_alias);
4106 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9128,
4107 quirk_dma_func1_alias);
4108 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c14 */
4109 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9130,
4110 quirk_dma_func1_alias);
4111 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9170,
4112 quirk_dma_func1_alias);
4113 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c47 + c57 */
4114 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9172,
4115 quirk_dma_func1_alias);
4116 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c59 */
4117 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x917a,
4118 quirk_dma_func1_alias);
4119 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c78 */
4120 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9182,
4121 quirk_dma_func1_alias);
4122 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c134 */
4123 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9183,
4124 quirk_dma_func1_alias);
4125 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c46 */
4126 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x91a0,
4127 quirk_dma_func1_alias);
4128 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c135 */
4129 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9215,
4130 quirk_dma_func1_alias);
4131 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c127 */
4132 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9220,
4133 quirk_dma_func1_alias);
4134 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c49 */
4135 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9230,
4136 quirk_dma_func1_alias);
4137 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0642,
4138 quirk_dma_func1_alias);
4139 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0645,
4140 quirk_dma_func1_alias);
4141 /* https://bugs.gentoo.org/show_bug.cgi?id=497630 */
4142 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_JMICRON,
4143 PCI_DEVICE_ID_JMICRON_JMB388_ESD,
4144 quirk_dma_func1_alias);
4145 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c117 */
4146 DECLARE_PCI_FIXUP_HEADER(0x1c28, /* Lite-On */
4147 0x0122, /* Plextor M6E (Marvell 88SS9183)*/
4148 quirk_dma_func1_alias);
4151 * Some devices DMA with the wrong devfn, not just the wrong function.
4152 * quirk_fixed_dma_alias() uses this table to create fixed aliases, where
4153 * the alias is "fixed" and independent of the device devfn.
4155 * For example, the Adaptec 3405 is a PCIe card with an Intel 80333 I/O
4156 * processor. To software, this appears as a PCIe-to-PCI/X bridge with a
4157 * single device on the secondary bus. In reality, the single exposed
4158 * device at 0e.0 is the Address Translation Unit (ATU) of the controller
4159 * that provides a bridge to the internal bus of the I/O processor. The
4160 * controller supports private devices, which can be hidden from PCI config
4161 * space. In the case of the Adaptec 3405, a private device at 01.0
4162 * appears to be the DMA engine, which therefore needs to become a DMA
4163 * alias for the device.
4165 static const struct pci_device_id fixed_dma_alias_tbl[] = {
4166 { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x0285,
4167 PCI_VENDOR_ID_ADAPTEC2, 0x02bb), /* Adaptec 3405 */
4168 .driver_data = PCI_DEVFN(1, 0) },
4169 { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x0285,
4170 PCI_VENDOR_ID_ADAPTEC2, 0x02bc), /* Adaptec 3805 */
4171 .driver_data = PCI_DEVFN(1, 0) },
4175 static void quirk_fixed_dma_alias(struct pci_dev *dev)
4177 const struct pci_device_id *id;
4179 id = pci_match_id(fixed_dma_alias_tbl, dev);
4181 pci_add_dma_alias(dev, id->driver_data, 1);
4183 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ADAPTEC2, 0x0285, quirk_fixed_dma_alias);
4186 * A few PCIe-to-PCI bridges fail to expose a PCIe capability, resulting in
4187 * using the wrong DMA alias for the device. Some of these devices can be
4188 * used as either forward or reverse bridges, so we need to test whether the
4189 * device is operating in the correct mode. We could probably apply this
4190 * quirk to PCI_ANY_ID, but for now we'll just use known offenders. The test
4191 * is for a non-root, non-PCIe bridge where the upstream device is PCIe and
4192 * is not a PCIe-to-PCI bridge, then @pdev is actually a PCIe-to-PCI bridge.
4194 static void quirk_use_pcie_bridge_dma_alias(struct pci_dev *pdev)
4196 if (!pci_is_root_bus(pdev->bus) &&
4197 pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
4198 !pci_is_pcie(pdev) && pci_is_pcie(pdev->bus->self) &&
4199 pci_pcie_type(pdev->bus->self) != PCI_EXP_TYPE_PCI_BRIDGE)
4200 pdev->dev_flags |= PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS;
4202 /* ASM1083/1085, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c46 */
4203 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080,
4204 quirk_use_pcie_bridge_dma_alias);
4205 /* Tundra 8113, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c43 */
4206 DECLARE_PCI_FIXUP_HEADER(0x10e3, 0x8113, quirk_use_pcie_bridge_dma_alias);
4207 /* ITE 8892, https://bugzilla.kernel.org/show_bug.cgi?id=73551 */
4208 DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias);
4209 /* ITE 8893 has the same problem as the 8892 */
4210 DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8893, quirk_use_pcie_bridge_dma_alias);
4211 /* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */
4212 DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);
4215 * MIC x200 NTB forwards PCIe traffic using multiple alien RIDs. They have to
4216 * be added as aliases to the DMA device in order to allow buffer access
4217 * when IOMMU is enabled. Following devfns have to match RIT-LUT table
4218 * programmed in the EEPROM.
4220 static void quirk_mic_x200_dma_alias(struct pci_dev *pdev)
4222 pci_add_dma_alias(pdev, PCI_DEVFN(0x10, 0x0), 1);
4223 pci_add_dma_alias(pdev, PCI_DEVFN(0x11, 0x0), 1);
4224 pci_add_dma_alias(pdev, PCI_DEVFN(0x12, 0x3), 1);
4226 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2260, quirk_mic_x200_dma_alias);
4227 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264, quirk_mic_x200_dma_alias);
4230 * Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices
4231 * exposing computational units via Non Transparent Bridges (NTB, PEX 87xx).
4233 * Similarly to MIC x200, we need to add DMA aliases to allow buffer access
4234 * when IOMMU is enabled. These aliases allow computational unit access to
4235 * host memory. These aliases mark the whole VCA device as one IOMMU
4238 * All possible slot numbers (0x20) are used, since we are unable to tell
4239 * what slot is used on other side. This quirk is intended for both host
4240 * and computational unit sides. The VCA devices have up to five functions
4241 * (four for DMA channels and one additional).
4243 static void quirk_pex_vca_alias(struct pci_dev *pdev)
4245 const unsigned int num_pci_slots = 0x20;
4248 for (slot = 0; slot < num_pci_slots; slot++)
4249 pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x0), 5);
4251 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2954, quirk_pex_vca_alias);
4252 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2955, quirk_pex_vca_alias);
4253 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2956, quirk_pex_vca_alias);
4254 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2958, quirk_pex_vca_alias);
4255 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2959, quirk_pex_vca_alias);
4256 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x295A, quirk_pex_vca_alias);
4259 * The IOMMU and interrupt controller on Broadcom Vulcan/Cavium ThunderX2 are
4260 * associated not at the root bus, but at a bridge below. This quirk avoids
4261 * generating invalid DMA aliases.
4263 static void quirk_bridge_cavm_thrx2_pcie_root(struct pci_dev *pdev)
4265 pdev->dev_flags |= PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT;
4267 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
4268 quirk_bridge_cavm_thrx2_pcie_root);
4269 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
4270 quirk_bridge_cavm_thrx2_pcie_root);
4273 * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
4274 * class code. Fix it.
4276 static void quirk_tw686x_class(struct pci_dev *pdev)
4278 u32 class = pdev->class;
4280 /* Use "Multimedia controller" class */
4281 pdev->class = (PCI_CLASS_MULTIMEDIA_OTHER << 8) | 0x01;
4282 pci_info(pdev, "TW686x PCI class overridden (%#08x -> %#08x)\n",
4283 class, pdev->class);
4285 DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6864, PCI_CLASS_NOT_DEFINED, 8,
4286 quirk_tw686x_class);
4287 DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6865, PCI_CLASS_NOT_DEFINED, 8,
4288 quirk_tw686x_class);
4289 DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6868, PCI_CLASS_NOT_DEFINED, 8,
4290 quirk_tw686x_class);
4291 DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6869, PCI_CLASS_NOT_DEFINED, 8,
4292 quirk_tw686x_class);
4295 * Some devices have problems with Transaction Layer Packets with the Relaxed
4296 * Ordering Attribute set. Such devices should mark themselves and other
4297 * device drivers should check before sending TLPs with RO set.
4299 static void quirk_relaxedordering_disable(struct pci_dev *dev)
4301 dev->dev_flags |= PCI_DEV_FLAGS_NO_RELAXED_ORDERING;
4302 pci_info(dev, "Disable Relaxed Ordering Attributes to avoid PCIe Completion erratum\n");
4306 * Intel Xeon processors based on Broadwell/Haswell microarchitecture Root
4307 * Complex have a Flow Control Credit issue which can cause performance
4308 * problems with Upstream Transaction Layer Packets with Relaxed Ordering set.
4310 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f01, PCI_CLASS_NOT_DEFINED, 8,
4311 quirk_relaxedordering_disable);
4312 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f02, PCI_CLASS_NOT_DEFINED, 8,
4313 quirk_relaxedordering_disable);
4314 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f03, PCI_CLASS_NOT_DEFINED, 8,
4315 quirk_relaxedordering_disable);
4316 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f04, PCI_CLASS_NOT_DEFINED, 8,
4317 quirk_relaxedordering_disable);
4318 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f05, PCI_CLASS_NOT_DEFINED, 8,
4319 quirk_relaxedordering_disable);
4320 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f06, PCI_CLASS_NOT_DEFINED, 8,
4321 quirk_relaxedordering_disable);
4322 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f07, PCI_CLASS_NOT_DEFINED, 8,
4323 quirk_relaxedordering_disable);
4324 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f08, PCI_CLASS_NOT_DEFINED, 8,
4325 quirk_relaxedordering_disable);
4326 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f09, PCI_CLASS_NOT_DEFINED, 8,
4327 quirk_relaxedordering_disable);
4328 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0a, PCI_CLASS_NOT_DEFINED, 8,
4329 quirk_relaxedordering_disable);
4330 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0b, PCI_CLASS_NOT_DEFINED, 8,
4331 quirk_relaxedordering_disable);
4332 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0c, PCI_CLASS_NOT_DEFINED, 8,
4333 quirk_relaxedordering_disable);
4334 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0d, PCI_CLASS_NOT_DEFINED, 8,
4335 quirk_relaxedordering_disable);
4336 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0e, PCI_CLASS_NOT_DEFINED, 8,
4337 quirk_relaxedordering_disable);
4338 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f01, PCI_CLASS_NOT_DEFINED, 8,
4339 quirk_relaxedordering_disable);
4340 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f02, PCI_CLASS_NOT_DEFINED, 8,
4341 quirk_relaxedordering_disable);
4342 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f03, PCI_CLASS_NOT_DEFINED, 8,
4343 quirk_relaxedordering_disable);
4344 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f04, PCI_CLASS_NOT_DEFINED, 8,
4345 quirk_relaxedordering_disable);
4346 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f05, PCI_CLASS_NOT_DEFINED, 8,
4347 quirk_relaxedordering_disable);
4348 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f06, PCI_CLASS_NOT_DEFINED, 8,
4349 quirk_relaxedordering_disable);
4350 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f07, PCI_CLASS_NOT_DEFINED, 8,
4351 quirk_relaxedordering_disable);
4352 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f08, PCI_CLASS_NOT_DEFINED, 8,
4353 quirk_relaxedordering_disable);
4354 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f09, PCI_CLASS_NOT_DEFINED, 8,
4355 quirk_relaxedordering_disable);
4356 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0a, PCI_CLASS_NOT_DEFINED, 8,
4357 quirk_relaxedordering_disable);
4358 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0b, PCI_CLASS_NOT_DEFINED, 8,
4359 quirk_relaxedordering_disable);
4360 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0c, PCI_CLASS_NOT_DEFINED, 8,
4361 quirk_relaxedordering_disable);
4362 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0d, PCI_CLASS_NOT_DEFINED, 8,
4363 quirk_relaxedordering_disable);
4364 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0e, PCI_CLASS_NOT_DEFINED, 8,
4365 quirk_relaxedordering_disable);
4368 * The AMD ARM A1100 (aka "SEATTLE") SoC has a bug in its PCIe Root Complex
4369 * where Upstream Transaction Layer Packets with the Relaxed Ordering
4370 * Attribute clear are allowed to bypass earlier TLPs with Relaxed Ordering
4371 * set. This is a violation of the PCIe 3.0 Transaction Ordering Rules
4372 * outlined in Section 2.4.1 (PCI Express(r) Base Specification Revision 3.0
4373 * November 10, 2010). As a result, on this platform we can't use Relaxed
4374 * Ordering for Upstream TLPs.
4376 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a00, PCI_CLASS_NOT_DEFINED, 8,
4377 quirk_relaxedordering_disable);
4378 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a01, PCI_CLASS_NOT_DEFINED, 8,
4379 quirk_relaxedordering_disable);
4380 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a02, PCI_CLASS_NOT_DEFINED, 8,
4381 quirk_relaxedordering_disable);
4384 * Per PCIe r3.0, sec 2.2.9, "Completion headers must supply the same
4385 * values for the Attribute as were supplied in the header of the
4386 * corresponding Request, except as explicitly allowed when IDO is used."
4388 * If a non-compliant device generates a completion with a different
4389 * attribute than the request, the receiver may accept it (which itself
4390 * seems non-compliant based on sec 2.3.2), or it may handle it as a
4391 * Malformed TLP or an Unexpected Completion, which will probably lead to a
4392 * device access timeout.
4394 * If the non-compliant device generates completions with zero attributes
4395 * (instead of copying the attributes from the request), we can work around
4396 * this by disabling the "Relaxed Ordering" and "No Snoop" attributes in
4397 * upstream devices so they always generate requests with zero attributes.
4399 * This affects other devices under the same Root Port, but since these
4400 * attributes are performance hints, there should be no functional problem.
4402 * Note that Configuration Space accesses are never supposed to have TLP
4403 * Attributes, so we're safe waiting till after any Configuration Space
4404 * accesses to do the Root Port fixup.
4406 static void quirk_disable_root_port_attributes(struct pci_dev *pdev)
4408 struct pci_dev *root_port = pcie_find_root_port(pdev);
4411 pci_warn(pdev, "PCIe Completion erratum may cause device errors\n");
4415 pci_info(root_port, "Disabling No Snoop/Relaxed Ordering Attributes to avoid PCIe Completion erratum in %s\n",
4416 dev_name(&pdev->dev));
4417 pcie_capability_clear_and_set_word(root_port, PCI_EXP_DEVCTL,
4418 PCI_EXP_DEVCTL_RELAX_EN |
4419 PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
4423 * The Chelsio T5 chip fails to copy TLP Attributes from a Request to the
4424 * Completion it generates.
4426 static void quirk_chelsio_T5_disable_root_port_attributes(struct pci_dev *pdev)
4429 * This mask/compare operation selects for Physical Function 4 on a
4430 * T5. We only need to fix up the Root Port once for any of the
4431 * PFs. PF[0..3] have PCI Device IDs of 0x50xx, but PF4 is uniquely
4432 * 0x54xx so we use that one.
4434 if ((pdev->device & 0xff00) == 0x5400)
4435 quirk_disable_root_port_attributes(pdev);
4437 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
4438 quirk_chelsio_T5_disable_root_port_attributes);
4441 * pci_acs_ctrl_enabled - compare desired ACS controls with those provided
4443 * @acs_ctrl_req: Bitmask of desired ACS controls
4444 * @acs_ctrl_ena: Bitmask of ACS controls enabled or provided implicitly by
4445 * the hardware design
4447 * Return 1 if all ACS controls in the @acs_ctrl_req bitmask are included
4448 * in @acs_ctrl_ena, i.e., the device provides all the access controls the
4449 * caller desires. Return 0 otherwise.
4451 static int pci_acs_ctrl_enabled(u16 acs_ctrl_req, u16 acs_ctrl_ena)
4453 if ((acs_ctrl_req & acs_ctrl_ena) == acs_ctrl_req)
4459 * AMD has indicated that the devices below do not support peer-to-peer
4460 * in any system where they are found in the southbridge with an AMD
4461 * IOMMU in the system. Multifunction devices that do not support
4462 * peer-to-peer between functions can claim to support a subset of ACS.
4463 * Such devices effectively enable request redirect (RR) and completion
4464 * redirect (CR) since all transactions are redirected to the upstream
4471 * 1002:4385 SBx00 SMBus Controller
4472 * 1002:439c SB7x0/SB8x0/SB9x0 IDE Controller
4473 * 1002:4383 SBx00 Azalia (Intel HDA)
4474 * 1002:439d SB7x0/SB8x0/SB9x0 LPC host controller
4475 * 1002:4384 SBx00 PCI to PCI Bridge
4476 * 1002:4399 SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
4478 * https://bugzilla.kernel.org/show_bug.cgi?id=81841#c15
4480 * 1022:780f [AMD] FCH PCI Bridge
4481 * 1022:7809 [AMD] FCH USB OHCI Controller
4483 static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags)
4486 struct acpi_table_header *header = NULL;
4489 /* Targeting multifunction devices on the SB (appears on root bus) */
4490 if (!dev->multifunction || !pci_is_root_bus(dev->bus))
4493 /* The IVRS table describes the AMD IOMMU */
4494 status = acpi_get_table("IVRS", 0, &header);
4495 if (ACPI_FAILURE(status))
4498 acpi_put_table(header);
4500 /* Filter out flags not applicable to multifunction */
4501 acs_flags &= (PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC | PCI_ACS_DT);
4503 return pci_acs_ctrl_enabled(acs_flags, PCI_ACS_RR | PCI_ACS_CR);
4509 static bool pci_quirk_cavium_acs_match(struct pci_dev *dev)
4511 if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
4514 switch (dev->device) {
4516 * Effectively selects all downstream ports for whole ThunderX1
4517 * (which represents 8 SoCs).
4519 case 0xa000 ... 0xa7ff: /* ThunderX1 */
4520 case 0xaf84: /* ThunderX2 */
4521 case 0xb884: /* ThunderX3 */
4528 static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
4530 if (!pci_quirk_cavium_acs_match(dev))
4534 * Cavium Root Ports don't advertise an ACS capability. However,
4535 * the RTL internally implements similar protection as if ACS had
4536 * Source Validation, Request Redirection, Completion Redirection,
4537 * and Upstream Forwarding features enabled. Assert that the
4538 * hardware implements and enables equivalent ACS functionality for
4541 return pci_acs_ctrl_enabled(acs_flags,
4542 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4545 static int pci_quirk_xgene_acs(struct pci_dev *dev, u16 acs_flags)
4548 * X-Gene Root Ports matching this quirk do not allow peer-to-peer
4549 * transactions with others, allowing masking out these bits as if they
4550 * were unimplemented in the ACS capability.
4552 return pci_acs_ctrl_enabled(acs_flags,
4553 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4557 * Many Zhaoxin Root Ports and Switch Downstream Ports have no ACS capability.
4558 * But the implementation could block peer-to-peer transactions between them
4559 * and provide ACS-like functionality.
4561 static int pci_quirk_zhaoxin_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
4563 if (!pci_is_pcie(dev) ||
4564 ((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) &&
4565 (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
4568 switch (dev->device) {
4569 case 0x0710 ... 0x071e:
4571 case 0x0723 ... 0x0732:
4572 return pci_acs_ctrl_enabled(acs_flags,
4573 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4580 * Many Intel PCH Root Ports do provide ACS-like features to disable peer
4581 * transactions and validate bus numbers in requests, but do not provide an
4582 * actual PCIe ACS capability. This is the list of device IDs known to fall
4583 * into that category as provided by Intel in Red Hat bugzilla 1037684.
4585 static const u16 pci_quirk_intel_pch_acs_ids[] = {
4587 0x3b42, 0x3b43, 0x3b44, 0x3b45, 0x3b46, 0x3b47, 0x3b48, 0x3b49,
4588 0x3b4a, 0x3b4b, 0x3b4c, 0x3b4d, 0x3b4e, 0x3b4f, 0x3b50, 0x3b51,
4589 /* Cougarpoint PCH */
4590 0x1c10, 0x1c11, 0x1c12, 0x1c13, 0x1c14, 0x1c15, 0x1c16, 0x1c17,
4591 0x1c18, 0x1c19, 0x1c1a, 0x1c1b, 0x1c1c, 0x1c1d, 0x1c1e, 0x1c1f,
4592 /* Pantherpoint PCH */
4593 0x1e10, 0x1e11, 0x1e12, 0x1e13, 0x1e14, 0x1e15, 0x1e16, 0x1e17,
4594 0x1e18, 0x1e19, 0x1e1a, 0x1e1b, 0x1e1c, 0x1e1d, 0x1e1e, 0x1e1f,
4595 /* Lynxpoint-H PCH */
4596 0x8c10, 0x8c11, 0x8c12, 0x8c13, 0x8c14, 0x8c15, 0x8c16, 0x8c17,
4597 0x8c18, 0x8c19, 0x8c1a, 0x8c1b, 0x8c1c, 0x8c1d, 0x8c1e, 0x8c1f,
4598 /* Lynxpoint-LP PCH */
4599 0x9c10, 0x9c11, 0x9c12, 0x9c13, 0x9c14, 0x9c15, 0x9c16, 0x9c17,
4600 0x9c18, 0x9c19, 0x9c1a, 0x9c1b,
4602 0x9c90, 0x9c91, 0x9c92, 0x9c93, 0x9c94, 0x9c95, 0x9c96, 0x9c97,
4603 0x9c98, 0x9c99, 0x9c9a, 0x9c9b,
4604 /* Patsburg (X79) PCH */
4605 0x1d10, 0x1d12, 0x1d14, 0x1d16, 0x1d18, 0x1d1a, 0x1d1c, 0x1d1e,
4606 /* Wellsburg (X99) PCH */
4607 0x8d10, 0x8d11, 0x8d12, 0x8d13, 0x8d14, 0x8d15, 0x8d16, 0x8d17,
4608 0x8d18, 0x8d19, 0x8d1a, 0x8d1b, 0x8d1c, 0x8d1d, 0x8d1e,
4609 /* Lynx Point (9 series) PCH */
4610 0x8c90, 0x8c92, 0x8c94, 0x8c96, 0x8c98, 0x8c9a, 0x8c9c, 0x8c9e,
4613 static bool pci_quirk_intel_pch_acs_match(struct pci_dev *dev)
4617 /* Filter out a few obvious non-matches first */
4618 if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
4621 for (i = 0; i < ARRAY_SIZE(pci_quirk_intel_pch_acs_ids); i++)
4622 if (pci_quirk_intel_pch_acs_ids[i] == dev->device)
4628 static int pci_quirk_intel_pch_acs(struct pci_dev *dev, u16 acs_flags)
4630 if (!pci_quirk_intel_pch_acs_match(dev))
4633 if (dev->dev_flags & PCI_DEV_FLAGS_ACS_ENABLED_QUIRK)
4634 return pci_acs_ctrl_enabled(acs_flags,
4635 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4637 return pci_acs_ctrl_enabled(acs_flags, 0);
4641 * These QCOM Root Ports do provide ACS-like features to disable peer
4642 * transactions and validate bus numbers in requests, but do not provide an
4643 * actual PCIe ACS capability. Hardware supports source validation but it
4644 * will report the issue as Completer Abort instead of ACS Violation.
4645 * Hardware doesn't support peer-to-peer and each Root Port is a Root
4646 * Complex with unique segment numbers. It is not possible for one Root
4647 * Port to pass traffic to another Root Port. All PCIe transactions are
4648 * terminated inside the Root Port.
4650 static int pci_quirk_qcom_rp_acs(struct pci_dev *dev, u16 acs_flags)
4652 return pci_acs_ctrl_enabled(acs_flags,
4653 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4657 * Each of these NXP Root Ports is in a Root Complex with a unique segment
4658 * number and does provide isolation features to disable peer transactions
4659 * and validate bus numbers in requests, but does not provide an ACS
4662 static int pci_quirk_nxp_rp_acs(struct pci_dev *dev, u16 acs_flags)
4664 return pci_acs_ctrl_enabled(acs_flags,
4665 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4668 static int pci_quirk_al_acs(struct pci_dev *dev, u16 acs_flags)
4670 if (pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
4674 * Amazon's Annapurna Labs root ports don't include an ACS capability,
4675 * but do include ACS-like functionality. The hardware doesn't support
4676 * peer-to-peer transactions via the root port and each has a unique
4679 * Additionally, the root ports cannot send traffic to each other.
4681 acs_flags &= ~(PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4683 return acs_flags ? 0 : 1;
4687 * Sunrise Point PCH root ports implement ACS, but unfortunately as shown in
4688 * the datasheet (Intel 100 Series Chipset Family PCH Datasheet, Vol. 2,
4689 * 12.1.46, 12.1.47)[1] this chipset uses dwords for the ACS capability and
4690 * control registers whereas the PCIe spec packs them into words (Rev 3.0,
4691 * 7.16 ACS Extended Capability). The bit definitions are correct, but the
4692 * control register is at offset 8 instead of 6 and we should probably use
4693 * dword accesses to them. This applies to the following PCI Device IDs, as
4694 * found in volume 1 of the datasheet[2]:
4696 * 0xa110-0xa11f Sunrise Point-H PCI Express Root Port #{0-16}
4697 * 0xa167-0xa16a Sunrise Point-H PCI Express Root Port #{17-20}
4699 * N.B. This doesn't fix what lspci shows.
4701 * The 100 series chipset specification update includes this as errata #23[3].
4703 * The 200 series chipset (Union Point) has the same bug according to the
4704 * specification update (Intel 200 Series Chipset Family Platform Controller
4705 * Hub, Specification Update, January 2017, Revision 001, Document# 335194-001,
4706 * Errata 22)[4]. Per the datasheet[5], root port PCI Device IDs for this
4709 * 0xa290-0xa29f PCI Express Root port #{0-16}
4710 * 0xa2e7-0xa2ee PCI Express Root port #{17-24}
4712 * Mobile chipsets are also affected, 7th & 8th Generation
4713 * Specification update confirms ACS errata 22, status no fix: (7th Generation
4714 * Intel Processor Family I/O for U/Y Platforms and 8th Generation Intel
4715 * Processor Family I/O for U Quad Core Platforms Specification Update,
4716 * August 2017, Revision 002, Document#: 334660-002)[6]
4717 * Device IDs from I/O datasheet: (7th Generation Intel Processor Family I/O
4718 * for U/Y Platforms and 8th Generation Intel ® Processor Family I/O for U
4719 * Quad Core Platforms, Vol 1 of 2, August 2017, Document#: 334658-003)[7]
4721 * 0x9d10-0x9d1b PCI Express Root port #{1-12}
4723 * [1] https://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-2.html
4724 * [2] https://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-1.html
4725 * [3] https://www.intel.com/content/www/us/en/chipsets/100-series-chipset-spec-update.html
4726 * [4] https://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-spec-update.html
4727 * [5] https://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-datasheet-vol-1.html
4728 * [6] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-spec-update.html
4729 * [7] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-datasheet-vol-1.html
4731 static bool pci_quirk_intel_spt_pch_acs_match(struct pci_dev *dev)
4733 if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
4736 switch (dev->device) {
4737 case 0xa110 ... 0xa11f: case 0xa167 ... 0xa16a: /* Sunrise Point */
4738 case 0xa290 ... 0xa29f: case 0xa2e7 ... 0xa2ee: /* Union Point */
4739 case 0x9d10 ... 0x9d1b: /* 7th & 8th Gen Mobile */
4746 #define INTEL_SPT_ACS_CTRL (PCI_ACS_CAP + 4)
4748 static int pci_quirk_intel_spt_pch_acs(struct pci_dev *dev, u16 acs_flags)
4753 if (!pci_quirk_intel_spt_pch_acs_match(dev))
4760 /* see pci_acs_flags_enabled() */
4761 pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
4762 acs_flags &= (cap | PCI_ACS_EC);
4764 pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);
4766 return pci_acs_ctrl_enabled(acs_flags, ctrl);
4769 static int pci_quirk_mf_endpoint_acs(struct pci_dev *dev, u16 acs_flags)
4772 * SV, TB, and UF are not relevant to multifunction endpoints.
4774 * Multifunction devices are only required to implement RR, CR, and DT
4775 * in their ACS capability if they support peer-to-peer transactions.
4776 * Devices matching this quirk have been verified by the vendor to not
4777 * perform peer-to-peer with other functions, allowing us to mask out
4778 * these bits as if they were unimplemented in the ACS capability.
4780 return pci_acs_ctrl_enabled(acs_flags,
4781 PCI_ACS_SV | PCI_ACS_TB | PCI_ACS_RR |
4782 PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_DT);
4785 static int pci_quirk_rciep_acs(struct pci_dev *dev, u16 acs_flags)
4788 * Intel RCiEP's are required to allow p2p only on translated
4789 * addresses. Refer to Intel VT-d specification, r3.1, sec 3.16,
4790 * "Root-Complex Peer to Peer Considerations".
4792 if (pci_pcie_type(dev) != PCI_EXP_TYPE_RC_END)
4795 return pci_acs_ctrl_enabled(acs_flags,
4796 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4799 static int pci_quirk_brcm_acs(struct pci_dev *dev, u16 acs_flags)
4802 * iProc PAXB Root Ports don't advertise an ACS capability, but
4803 * they do not allow peer-to-peer transactions between Root Ports.
4804 * Allow each Root Port to be in a separate IOMMU group by masking
4807 return pci_acs_ctrl_enabled(acs_flags,
4808 PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
4811 static const struct pci_dev_acs_enabled {
4814 int (*acs_enabled)(struct pci_dev *dev, u16 acs_flags);
4815 } pci_dev_acs_enabled[] = {
4816 { PCI_VENDOR_ID_ATI, 0x4385, pci_quirk_amd_sb_acs },
4817 { PCI_VENDOR_ID_ATI, 0x439c, pci_quirk_amd_sb_acs },
4818 { PCI_VENDOR_ID_ATI, 0x4383, pci_quirk_amd_sb_acs },
4819 { PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs },
4820 { PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs },
4821 { PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs },
4822 { PCI_VENDOR_ID_AMD, 0x780f, pci_quirk_amd_sb_acs },
4823 { PCI_VENDOR_ID_AMD, 0x7809, pci_quirk_amd_sb_acs },
4824 { PCI_VENDOR_ID_SOLARFLARE, 0x0903, pci_quirk_mf_endpoint_acs },
4825 { PCI_VENDOR_ID_SOLARFLARE, 0x0923, pci_quirk_mf_endpoint_acs },
4826 { PCI_VENDOR_ID_SOLARFLARE, 0x0A03, pci_quirk_mf_endpoint_acs },
4827 { PCI_VENDOR_ID_INTEL, 0x10C6, pci_quirk_mf_endpoint_acs },
4828 { PCI_VENDOR_ID_INTEL, 0x10DB, pci_quirk_mf_endpoint_acs },
4829 { PCI_VENDOR_ID_INTEL, 0x10DD, pci_quirk_mf_endpoint_acs },
4830 { PCI_VENDOR_ID_INTEL, 0x10E1, pci_quirk_mf_endpoint_acs },
4831 { PCI_VENDOR_ID_INTEL, 0x10F1, pci_quirk_mf_endpoint_acs },
4832 { PCI_VENDOR_ID_INTEL, 0x10F7, pci_quirk_mf_endpoint_acs },
4833 { PCI_VENDOR_ID_INTEL, 0x10F8, pci_quirk_mf_endpoint_acs },
4834 { PCI_VENDOR_ID_INTEL, 0x10F9, pci_quirk_mf_endpoint_acs },
4835 { PCI_VENDOR_ID_INTEL, 0x10FA, pci_quirk_mf_endpoint_acs },
4836 { PCI_VENDOR_ID_INTEL, 0x10FB, pci_quirk_mf_endpoint_acs },
4837 { PCI_VENDOR_ID_INTEL, 0x10FC, pci_quirk_mf_endpoint_acs },
4838 { PCI_VENDOR_ID_INTEL, 0x1507, pci_quirk_mf_endpoint_acs },
4839 { PCI_VENDOR_ID_INTEL, 0x1514, pci_quirk_mf_endpoint_acs },
4840 { PCI_VENDOR_ID_INTEL, 0x151C, pci_quirk_mf_endpoint_acs },
4841 { PCI_VENDOR_ID_INTEL, 0x1529, pci_quirk_mf_endpoint_acs },
4842 { PCI_VENDOR_ID_INTEL, 0x152A, pci_quirk_mf_endpoint_acs },
4843 { PCI_VENDOR_ID_INTEL, 0x154D, pci_quirk_mf_endpoint_acs },
4844 { PCI_VENDOR_ID_INTEL, 0x154F, pci_quirk_mf_endpoint_acs },
4845 { PCI_VENDOR_ID_INTEL, 0x1551, pci_quirk_mf_endpoint_acs },
4846 { PCI_VENDOR_ID_INTEL, 0x1558, pci_quirk_mf_endpoint_acs },
4848 { PCI_VENDOR_ID_INTEL, 0x1509, pci_quirk_mf_endpoint_acs },
4849 { PCI_VENDOR_ID_INTEL, 0x150E, pci_quirk_mf_endpoint_acs },
4850 { PCI_VENDOR_ID_INTEL, 0x150F, pci_quirk_mf_endpoint_acs },
4851 { PCI_VENDOR_ID_INTEL, 0x1510, pci_quirk_mf_endpoint_acs },
4852 { PCI_VENDOR_ID_INTEL, 0x1511, pci_quirk_mf_endpoint_acs },
4853 { PCI_VENDOR_ID_INTEL, 0x1516, pci_quirk_mf_endpoint_acs },
4854 { PCI_VENDOR_ID_INTEL, 0x1527, pci_quirk_mf_endpoint_acs },
4856 { PCI_VENDOR_ID_INTEL, 0x10C9, pci_quirk_mf_endpoint_acs },
4857 { PCI_VENDOR_ID_INTEL, 0x10E6, pci_quirk_mf_endpoint_acs },
4858 { PCI_VENDOR_ID_INTEL, 0x10E7, pci_quirk_mf_endpoint_acs },
4859 { PCI_VENDOR_ID_INTEL, 0x10E8, pci_quirk_mf_endpoint_acs },
4860 { PCI_VENDOR_ID_INTEL, 0x150A, pci_quirk_mf_endpoint_acs },
4861 { PCI_VENDOR_ID_INTEL, 0x150D, pci_quirk_mf_endpoint_acs },
4862 { PCI_VENDOR_ID_INTEL, 0x1518, pci_quirk_mf_endpoint_acs },
4863 { PCI_VENDOR_ID_INTEL, 0x1526, pci_quirk_mf_endpoint_acs },
4865 { PCI_VENDOR_ID_INTEL, 0x10A7, pci_quirk_mf_endpoint_acs },
4866 { PCI_VENDOR_ID_INTEL, 0x10A9, pci_quirk_mf_endpoint_acs },
4867 { PCI_VENDOR_ID_INTEL, 0x10D6, pci_quirk_mf_endpoint_acs },
4869 { PCI_VENDOR_ID_INTEL, 0x1521, pci_quirk_mf_endpoint_acs },
4870 { PCI_VENDOR_ID_INTEL, 0x1522, pci_quirk_mf_endpoint_acs },
4871 { PCI_VENDOR_ID_INTEL, 0x1523, pci_quirk_mf_endpoint_acs },
4872 { PCI_VENDOR_ID_INTEL, 0x1524, pci_quirk_mf_endpoint_acs },
4873 /* 82571 (Quads omitted due to non-ACS switch) */
4874 { PCI_VENDOR_ID_INTEL, 0x105E, pci_quirk_mf_endpoint_acs },
4875 { PCI_VENDOR_ID_INTEL, 0x105F, pci_quirk_mf_endpoint_acs },
4876 { PCI_VENDOR_ID_INTEL, 0x1060, pci_quirk_mf_endpoint_acs },
4877 { PCI_VENDOR_ID_INTEL, 0x10D9, pci_quirk_mf_endpoint_acs },
4879 { PCI_VENDOR_ID_INTEL, 0x15b7, pci_quirk_mf_endpoint_acs },
4880 { PCI_VENDOR_ID_INTEL, 0x15b8, pci_quirk_mf_endpoint_acs },
4881 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_rciep_acs },
4882 /* QCOM QDF2xxx root ports */
4883 { PCI_VENDOR_ID_QCOM, 0x0400, pci_quirk_qcom_rp_acs },
4884 { PCI_VENDOR_ID_QCOM, 0x0401, pci_quirk_qcom_rp_acs },
4885 /* HXT SD4800 root ports. The ACS design is same as QCOM QDF2xxx */
4886 { PCI_VENDOR_ID_HXT, 0x0401, pci_quirk_qcom_rp_acs },
4887 /* Intel PCH root ports */
4888 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
4889 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_spt_pch_acs },
4890 { 0x19a2, 0x710, pci_quirk_mf_endpoint_acs }, /* Emulex BE3-R */
4891 { 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */
4892 /* Cavium ThunderX */
4893 { PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs },
4894 /* Cavium multi-function devices */
4895 { PCI_VENDOR_ID_CAVIUM, 0xA026, pci_quirk_mf_endpoint_acs },
4896 { PCI_VENDOR_ID_CAVIUM, 0xA059, pci_quirk_mf_endpoint_acs },
4897 { PCI_VENDOR_ID_CAVIUM, 0xA060, pci_quirk_mf_endpoint_acs },
4899 { PCI_VENDOR_ID_AMCC, 0xE004, pci_quirk_xgene_acs },
4900 /* Ampere Computing */
4901 { PCI_VENDOR_ID_AMPERE, 0xE005, pci_quirk_xgene_acs },
4902 { PCI_VENDOR_ID_AMPERE, 0xE006, pci_quirk_xgene_acs },
4903 { PCI_VENDOR_ID_AMPERE, 0xE007, pci_quirk_xgene_acs },
4904 { PCI_VENDOR_ID_AMPERE, 0xE008, pci_quirk_xgene_acs },
4905 { PCI_VENDOR_ID_AMPERE, 0xE009, pci_quirk_xgene_acs },
4906 { PCI_VENDOR_ID_AMPERE, 0xE00A, pci_quirk_xgene_acs },
4907 { PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs },
4908 { PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs },
4909 /* Broadcom multi-function device */
4910 { PCI_VENDOR_ID_BROADCOM, 0x16D7, pci_quirk_mf_endpoint_acs },
4911 { PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs },
4912 /* Amazon Annapurna Labs */
4913 { PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs },
4914 /* Zhaoxin multi-function devices */
4915 { PCI_VENDOR_ID_ZHAOXIN, 0x3038, pci_quirk_mf_endpoint_acs },
4916 { PCI_VENDOR_ID_ZHAOXIN, 0x3104, pci_quirk_mf_endpoint_acs },
4917 { PCI_VENDOR_ID_ZHAOXIN, 0x9083, pci_quirk_mf_endpoint_acs },
4918 /* NXP root ports, xx=16, 12, or 08 cores */
4919 /* LX2xx0A : without security features + CAN-FD */
4920 { PCI_VENDOR_ID_NXP, 0x8d81, pci_quirk_nxp_rp_acs },
4921 { PCI_VENDOR_ID_NXP, 0x8da1, pci_quirk_nxp_rp_acs },
4922 { PCI_VENDOR_ID_NXP, 0x8d83, pci_quirk_nxp_rp_acs },
4923 /* LX2xx0C : security features + CAN-FD */
4924 { PCI_VENDOR_ID_NXP, 0x8d80, pci_quirk_nxp_rp_acs },
4925 { PCI_VENDOR_ID_NXP, 0x8da0, pci_quirk_nxp_rp_acs },
4926 { PCI_VENDOR_ID_NXP, 0x8d82, pci_quirk_nxp_rp_acs },
4927 /* LX2xx0E : security features + CAN */
4928 { PCI_VENDOR_ID_NXP, 0x8d90, pci_quirk_nxp_rp_acs },
4929 { PCI_VENDOR_ID_NXP, 0x8db0, pci_quirk_nxp_rp_acs },
4930 { PCI_VENDOR_ID_NXP, 0x8d92, pci_quirk_nxp_rp_acs },
4931 /* LX2xx0N : without security features + CAN */
4932 { PCI_VENDOR_ID_NXP, 0x8d91, pci_quirk_nxp_rp_acs },
4933 { PCI_VENDOR_ID_NXP, 0x8db1, pci_quirk_nxp_rp_acs },
4934 { PCI_VENDOR_ID_NXP, 0x8d93, pci_quirk_nxp_rp_acs },
4935 /* LX2xx2A : without security features + CAN-FD */
4936 { PCI_VENDOR_ID_NXP, 0x8d89, pci_quirk_nxp_rp_acs },
4937 { PCI_VENDOR_ID_NXP, 0x8da9, pci_quirk_nxp_rp_acs },
4938 { PCI_VENDOR_ID_NXP, 0x8d8b, pci_quirk_nxp_rp_acs },
4939 /* LX2xx2C : security features + CAN-FD */
4940 { PCI_VENDOR_ID_NXP, 0x8d88, pci_quirk_nxp_rp_acs },
4941 { PCI_VENDOR_ID_NXP, 0x8da8, pci_quirk_nxp_rp_acs },
4942 { PCI_VENDOR_ID_NXP, 0x8d8a, pci_quirk_nxp_rp_acs },
4943 /* LX2xx2E : security features + CAN */
4944 { PCI_VENDOR_ID_NXP, 0x8d98, pci_quirk_nxp_rp_acs },
4945 { PCI_VENDOR_ID_NXP, 0x8db8, pci_quirk_nxp_rp_acs },
4946 { PCI_VENDOR_ID_NXP, 0x8d9a, pci_quirk_nxp_rp_acs },
4947 /* LX2xx2N : without security features + CAN */
4948 { PCI_VENDOR_ID_NXP, 0x8d99, pci_quirk_nxp_rp_acs },
4949 { PCI_VENDOR_ID_NXP, 0x8db9, pci_quirk_nxp_rp_acs },
4950 { PCI_VENDOR_ID_NXP, 0x8d9b, pci_quirk_nxp_rp_acs },
4951 /* Zhaoxin Root/Downstream Ports */
4952 { PCI_VENDOR_ID_ZHAOXIN, PCI_ANY_ID, pci_quirk_zhaoxin_pcie_ports_acs },
4957 * pci_dev_specific_acs_enabled - check whether device provides ACS controls
4959 * @acs_flags: Bitmask of desired ACS controls
4962 * -ENOTTY: No quirk applies to this device; we can't tell whether the
4963 * device provides the desired controls
4964 * 0: Device does not provide all the desired controls
4965 * >0: Device provides all the controls in @acs_flags
4967 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags)
4969 const struct pci_dev_acs_enabled *i;
4973 * Allow devices that do not expose standard PCIe ACS capabilities
4974 * or control to indicate their support here. Multi-function express
4975 * devices which do not allow internal peer-to-peer between functions,
4976 * but do not implement PCIe ACS may wish to return true here.
4978 for (i = pci_dev_acs_enabled; i->acs_enabled; i++) {
4979 if ((i->vendor == dev->vendor ||
4980 i->vendor == (u16)PCI_ANY_ID) &&
4981 (i->device == dev->device ||
4982 i->device == (u16)PCI_ANY_ID)) {
4983 ret = i->acs_enabled(dev, acs_flags);
4992 /* Config space offset of Root Complex Base Address register */
4993 #define INTEL_LPC_RCBA_REG 0xf0
4994 /* 31:14 RCBA address */
4995 #define INTEL_LPC_RCBA_MASK 0xffffc000
4997 #define INTEL_LPC_RCBA_ENABLE (1 << 0)
4999 /* Backbone Scratch Pad Register */
5000 #define INTEL_BSPR_REG 0x1104
5001 /* Backbone Peer Non-Posted Disable */
5002 #define INTEL_BSPR_REG_BPNPD (1 << 8)
5003 /* Backbone Peer Posted Disable */
5004 #define INTEL_BSPR_REG_BPPD (1 << 9)
5006 /* Upstream Peer Decode Configuration Register */
5007 #define INTEL_UPDCR_REG 0x1014
5008 /* 5:0 Peer Decode Enable bits */
5009 #define INTEL_UPDCR_REG_MASK 0x3f
5011 static int pci_quirk_enable_intel_lpc_acs(struct pci_dev *dev)
5013 u32 rcba, bspr, updcr;
5014 void __iomem *rcba_mem;
5017 * Read the RCBA register from the LPC (D31:F0). PCH root ports
5018 * are D28:F* and therefore get probed before LPC, thus we can't
5019 * use pci_get_slot()/pci_read_config_dword() here.
5021 pci_bus_read_config_dword(dev->bus, PCI_DEVFN(31, 0),
5022 INTEL_LPC_RCBA_REG, &rcba);
5023 if (!(rcba & INTEL_LPC_RCBA_ENABLE))
5026 rcba_mem = ioremap(rcba & INTEL_LPC_RCBA_MASK,
5027 PAGE_ALIGN(INTEL_UPDCR_REG));
5032 * The BSPR can disallow peer cycles, but it's set by soft strap and
5033 * therefore read-only. If both posted and non-posted peer cycles are
5034 * disallowed, we're ok. If either are allowed, then we need to use
5035 * the UPDCR to disable peer decodes for each port. This provides the
5036 * PCIe ACS equivalent of PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF
5038 bspr = readl(rcba_mem + INTEL_BSPR_REG);
5039 bspr &= INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD;
5040 if (bspr != (INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD)) {
5041 updcr = readl(rcba_mem + INTEL_UPDCR_REG);
5042 if (updcr & INTEL_UPDCR_REG_MASK) {
5043 pci_info(dev, "Disabling UPDCR peer decodes\n");
5044 updcr &= ~INTEL_UPDCR_REG_MASK;
5045 writel(updcr, rcba_mem + INTEL_UPDCR_REG);
5053 /* Miscellaneous Port Configuration register */
5054 #define INTEL_MPC_REG 0xd8
5055 /* MPC: Invalid Receive Bus Number Check Enable */
5056 #define INTEL_MPC_REG_IRBNCE (1 << 26)
5058 static void pci_quirk_enable_intel_rp_mpc_acs(struct pci_dev *dev)
5063 * When enabled, the IRBNCE bit of the MPC register enables the
5064 * equivalent of PCI ACS Source Validation (PCI_ACS_SV), which
5065 * ensures that requester IDs fall within the bus number range
5066 * of the bridge. Enable if not already.
5068 pci_read_config_dword(dev, INTEL_MPC_REG, &mpc);
5069 if (!(mpc & INTEL_MPC_REG_IRBNCE)) {
5070 pci_info(dev, "Enabling MPC IRBNCE\n");
5071 mpc |= INTEL_MPC_REG_IRBNCE;
5072 pci_write_config_word(dev, INTEL_MPC_REG, mpc);
5077 * Currently this quirk does the equivalent of
5078 * PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF
5080 * TODO: This quirk also needs to do equivalent of PCI_ACS_TB,
5081 * if dev->external_facing || dev->untrusted
5083 static int pci_quirk_enable_intel_pch_acs(struct pci_dev *dev)
5085 if (!pci_quirk_intel_pch_acs_match(dev))
5088 if (pci_quirk_enable_intel_lpc_acs(dev)) {
5089 pci_warn(dev, "Failed to enable Intel PCH ACS quirk\n");
5093 pci_quirk_enable_intel_rp_mpc_acs(dev);
5095 dev->dev_flags |= PCI_DEV_FLAGS_ACS_ENABLED_QUIRK;
5097 pci_info(dev, "Intel PCH root port ACS workaround enabled\n");
5102 static int pci_quirk_enable_intel_spt_pch_acs(struct pci_dev *dev)
5107 if (!pci_quirk_intel_spt_pch_acs_match(dev))
5114 pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
5115 pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);
5117 ctrl |= (cap & PCI_ACS_SV);
5118 ctrl |= (cap & PCI_ACS_RR);
5119 ctrl |= (cap & PCI_ACS_CR);
5120 ctrl |= (cap & PCI_ACS_UF);
5122 if (pci_ats_disabled() || dev->external_facing || dev->untrusted)
5123 ctrl |= (cap & PCI_ACS_TB);
5125 pci_write_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, ctrl);
5127 pci_info(dev, "Intel SPT PCH root port ACS workaround enabled\n");
5132 static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev)
5137 if (!pci_quirk_intel_spt_pch_acs_match(dev))
5144 pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
5145 pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);
5147 ctrl &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC);
5149 pci_write_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, ctrl);
5151 pci_info(dev, "Intel SPT PCH root port workaround: disabled ACS redirect\n");
5156 static const struct pci_dev_acs_ops {
5159 int (*enable_acs)(struct pci_dev *dev);
5160 int (*disable_acs_redir)(struct pci_dev *dev);
5161 } pci_dev_acs_ops[] = {
5162 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
5163 .enable_acs = pci_quirk_enable_intel_pch_acs,
5165 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
5166 .enable_acs = pci_quirk_enable_intel_spt_pch_acs,
5167 .disable_acs_redir = pci_quirk_disable_intel_spt_pch_acs_redir,
5171 int pci_dev_specific_enable_acs(struct pci_dev *dev)
5173 const struct pci_dev_acs_ops *p;
5176 for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
5177 p = &pci_dev_acs_ops[i];
5178 if ((p->vendor == dev->vendor ||
5179 p->vendor == (u16)PCI_ANY_ID) &&
5180 (p->device == dev->device ||
5181 p->device == (u16)PCI_ANY_ID) &&
5183 ret = p->enable_acs(dev);
5192 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
5194 const struct pci_dev_acs_ops *p;
5197 for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
5198 p = &pci_dev_acs_ops[i];
5199 if ((p->vendor == dev->vendor ||
5200 p->vendor == (u16)PCI_ANY_ID) &&
5201 (p->device == dev->device ||
5202 p->device == (u16)PCI_ANY_ID) &&
5203 p->disable_acs_redir) {
5204 ret = p->disable_acs_redir(dev);
5214 * The PCI capabilities list for Intel DH895xCC VFs (device ID 0x0443) with
5215 * QuickAssist Technology (QAT) is prematurely terminated in hardware. The
5216 * Next Capability pointer in the MSI Capability Structure should point to
5217 * the PCIe Capability Structure but is incorrectly hardwired as 0 terminating
5220 static void quirk_intel_qat_vf_cap(struct pci_dev *pdev)
5225 struct pci_cap_saved_state *state;
5227 /* Bail if the hardware bug is fixed */
5228 if (pdev->pcie_cap || pci_find_capability(pdev, PCI_CAP_ID_EXP))
5231 /* Bail if MSI Capability Structure is not found for some reason */
5232 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
5237 * Bail if Next Capability pointer in the MSI Capability Structure
5238 * is not the expected incorrect 0x00.
5240 pci_read_config_byte(pdev, pos + 1, &next_cap);
5245 * PCIe Capability Structure is expected to be at 0x50 and should
5246 * terminate the list (Next Capability pointer is 0x00). Verify
5247 * Capability Id and Next Capability pointer is as expected.
5248 * Open-code some of set_pcie_port_type() and pci_cfg_space_size_ext()
5249 * to correctly set kernel data structures which have already been
5250 * set incorrectly due to the hardware bug.
5253 pci_read_config_word(pdev, pos, ®16);
5254 if (reg16 == (0x0000 | PCI_CAP_ID_EXP)) {
5256 #ifndef PCI_EXP_SAVE_REGS
5257 #define PCI_EXP_SAVE_REGS 7
5259 int size = PCI_EXP_SAVE_REGS * sizeof(u16);
5261 pdev->pcie_cap = pos;
5262 pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, ®16);
5263 pdev->pcie_flags_reg = reg16;
5264 pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, ®16);
5265 pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;
5267 pdev->cfg_size = PCI_CFG_SPACE_EXP_SIZE;
5268 if (pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status) !=
5269 PCIBIOS_SUCCESSFUL || (status == 0xffffffff))
5270 pdev->cfg_size = PCI_CFG_SPACE_SIZE;
5272 if (pci_find_saved_cap(pdev, PCI_CAP_ID_EXP))
5276 state = kzalloc(sizeof(*state) + size, GFP_KERNEL);
5280 state->cap.cap_nr = PCI_CAP_ID_EXP;
5281 state->cap.cap_extended = 0;
5282 state->cap.size = size;
5283 cap = (u16 *)&state->cap.data[0];
5284 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &cap[i++]);
5285 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &cap[i++]);
5286 pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &cap[i++]);
5287 pcie_capability_read_word(pdev, PCI_EXP_RTCTL, &cap[i++]);
5288 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL2, &cap[i++]);
5289 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL2, &cap[i++]);
5290 pcie_capability_read_word(pdev, PCI_EXP_SLTCTL2, &cap[i++]);
5291 hlist_add_head(&state->next, &pdev->saved_cap_space);
5294 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap);
5297 * FLR may cause the following to devices to hang:
5299 * AMD Starship/Matisse HD Audio Controller 0x1487
5300 * AMD Starship USB 3.0 Host Controller 0x148c
5301 * AMD Matisse USB 3.0 Host Controller 0x149c
5302 * Intel 82579LM Gigabit Ethernet Controller 0x1502
5303 * Intel 82579V Gigabit Ethernet Controller 0x1503
5306 static void quirk_no_flr(struct pci_dev *dev)
5308 dev->dev_flags |= PCI_DEV_FLAGS_NO_FLR_RESET;
5310 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1487, quirk_no_flr);
5311 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x148c, quirk_no_flr);
5312 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x149c, quirk_no_flr);
5313 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_no_flr);
5314 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_no_flr);
5316 static void quirk_no_ext_tags(struct pci_dev *pdev)
5318 struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);
5323 bridge->no_ext_tags = 1;
5324 pci_info(pdev, "disabling Extended Tags (this device can't handle them)\n");
5326 pci_walk_bus(bridge->bus, pci_configure_extended_tags, NULL);
5328 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0132, quirk_no_ext_tags);
5329 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0140, quirk_no_ext_tags);
5330 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0141, quirk_no_ext_tags);
5331 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0142, quirk_no_ext_tags);
5332 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0144, quirk_no_ext_tags);
5333 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0420, quirk_no_ext_tags);
5334 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0422, quirk_no_ext_tags);
5336 #ifdef CONFIG_PCI_ATS
5338 * Some devices require additional driver setup to enable ATS. Don't use
5339 * ATS for those devices as ATS will be enabled before the driver has had a
5340 * chance to load and configure the device.
5342 static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
5344 if ((pdev->device == 0x7312 && pdev->revision != 0x00) ||
5345 (pdev->device == 0x7340 && pdev->revision != 0xc5) ||
5346 (pdev->device == 0x7341 && pdev->revision != 0x00))
5349 if (pdev->device == 0x15d8) {
5350 if (pdev->revision == 0xcf &&
5351 pdev->subsystem_vendor == 0xea50 &&
5352 (pdev->subsystem_device == 0xce19 ||
5353 pdev->subsystem_device == 0xcc10 ||
5354 pdev->subsystem_device == 0xcc08))
5361 pci_info(pdev, "disabling ATS\n");
5365 /* AMD Stoney platform GPU */
5366 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_amd_harvest_no_ats);
5367 /* AMD Iceland dGPU */
5368 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_amd_harvest_no_ats);
5369 /* AMD Navi10 dGPU */
5370 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7312, quirk_amd_harvest_no_ats);
5371 /* AMD Navi14 dGPU */
5372 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats);
5373 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7341, quirk_amd_harvest_no_ats);
5374 /* AMD Raven platform iGPU */
5375 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x15d8, quirk_amd_harvest_no_ats);
5376 #endif /* CONFIG_PCI_ATS */
5378 /* Freescale PCIe doesn't support MSI in RC mode */
5379 static void quirk_fsl_no_msi(struct pci_dev *pdev)
5381 if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT)
5384 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_no_msi);
5387 * Although not allowed by the spec, some multi-function devices have
5388 * dependencies of one function (consumer) on another (supplier). For the
5389 * consumer to work in D0, the supplier must also be in D0. Create a
5390 * device link from the consumer to the supplier to enforce this
5391 * dependency. Runtime PM is allowed by default on the consumer to prevent
5392 * it from permanently keeping the supplier awake.
5394 static void pci_create_device_link(struct pci_dev *pdev, unsigned int consumer,
5395 unsigned int supplier, unsigned int class,
5396 unsigned int class_shift)
5398 struct pci_dev *supplier_pdev;
5400 if (PCI_FUNC(pdev->devfn) != consumer)
5403 supplier_pdev = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
5405 PCI_DEVFN(PCI_SLOT(pdev->devfn), supplier));
5406 if (!supplier_pdev || (supplier_pdev->class >> class_shift) != class) {
5407 pci_dev_put(supplier_pdev);
5411 if (device_link_add(&pdev->dev, &supplier_pdev->dev,
5412 DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME))
5413 pci_info(pdev, "D0 power state depends on %s\n",
5414 pci_name(supplier_pdev));
5416 pci_err(pdev, "Cannot enforce power dependency on %s\n",
5417 pci_name(supplier_pdev));
5419 pm_runtime_allow(&pdev->dev);
5420 pci_dev_put(supplier_pdev);
5424 * Create device link for GPUs with integrated HDA controller for streaming
5425 * audio to attached displays.
5427 static void quirk_gpu_hda(struct pci_dev *hda)
5429 pci_create_device_link(hda, 1, 0, PCI_BASE_CLASS_DISPLAY, 16);
5431 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
5432 PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
5433 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMD, PCI_ANY_ID,
5434 PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
5435 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
5436 PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
5439 * Create device link for GPUs with integrated USB xHCI Host
5440 * controller to VGA.
5442 static void quirk_gpu_usb(struct pci_dev *usb)
5444 pci_create_device_link(usb, 2, 0, PCI_BASE_CLASS_DISPLAY, 16);
5446 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
5447 PCI_CLASS_SERIAL_USB, 8, quirk_gpu_usb);
5448 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
5449 PCI_CLASS_SERIAL_USB, 8, quirk_gpu_usb);
5452 * Create device link for GPUs with integrated Type-C UCSI controller
5453 * to VGA. Currently there is no class code defined for UCSI device over PCI
5454 * so using UNKNOWN class for now and it will be updated when UCSI
5455 * over PCI gets a class code.
5457 #define PCI_CLASS_SERIAL_UNKNOWN 0x0c80
5458 static void quirk_gpu_usb_typec_ucsi(struct pci_dev *ucsi)
5460 pci_create_device_link(ucsi, 3, 0, PCI_BASE_CLASS_DISPLAY, 16);
5462 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
5463 PCI_CLASS_SERIAL_UNKNOWN, 8,
5464 quirk_gpu_usb_typec_ucsi);
5465 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
5466 PCI_CLASS_SERIAL_UNKNOWN, 8,
5467 quirk_gpu_usb_typec_ucsi);
5470 * Enable the NVIDIA GPU integrated HDA controller if the BIOS left it
5471 * disabled. https://devtalk.nvidia.com/default/topic/1024022
5473 static void quirk_nvidia_hda(struct pci_dev *gpu)
5478 /* There was no integrated HDA controller before MCP89 */
5479 if (gpu->device < PCI_DEVICE_ID_NVIDIA_GEFORCE_320M)
5482 /* Bit 25 at offset 0x488 enables the HDA controller */
5483 pci_read_config_dword(gpu, 0x488, &val);
5487 pci_info(gpu, "Enabling HDA controller\n");
5488 pci_write_config_dword(gpu, 0x488, val | BIT(25));
5490 /* The GPU becomes a multi-function device when the HDA is enabled */
5491 pci_read_config_byte(gpu, PCI_HEADER_TYPE, &hdr_type);
5492 gpu->multifunction = !!(hdr_type & 0x80);
5494 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
5495 PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda);
5496 DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
5497 PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda);
5500 * Some IDT switches incorrectly flag an ACS Source Validation error on
5501 * completions for config read requests even though PCIe r4.0, sec
5502 * 6.12.1.1, says that completions are never affected by ACS Source
5503 * Validation. Here's the text of IDT 89H32H8G3-YC, erratum #36:
5505 * Item #36 - Downstream port applies ACS Source Validation to Completions
5506 * Section 6.12.1.1 of the PCI Express Base Specification 3.1 states that
5507 * completions are never affected by ACS Source Validation. However,
5508 * completions received by a downstream port of the PCIe switch from a
5509 * device that has not yet captured a PCIe bus number are incorrectly
5510 * dropped by ACS Source Validation by the switch downstream port.
5512 * The workaround suggested by IDT is to issue a config write to the
5513 * downstream device before issuing the first config read. This allows the
5514 * downstream device to capture its bus and device numbers (see PCIe r4.0,
5515 * sec 2.2.9), thus avoiding the ACS error on the completion.
5517 * However, we don't know when the device is ready to accept the config
5518 * write, so we do config reads until we receive a non-Config Request Retry
5519 * Status, then do the config write.
5521 * To avoid hitting the erratum when doing the config reads, we disable ACS
5522 * SV around this process.
5524 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *l, int timeout)
5529 struct pci_dev *bridge = bus->self;
5531 pos = bridge->acs_cap;
5533 /* Disable ACS SV before initial config reads */
5535 pci_read_config_word(bridge, pos + PCI_ACS_CTRL, &ctrl);
5536 if (ctrl & PCI_ACS_SV)
5537 pci_write_config_word(bridge, pos + PCI_ACS_CTRL,
5538 ctrl & ~PCI_ACS_SV);
5541 found = pci_bus_generic_read_dev_vendor_id(bus, devfn, l, timeout);
5543 /* Write Vendor ID (read-only) so the endpoint latches its bus/dev */
5545 pci_bus_write_config_word(bus, devfn, PCI_VENDOR_ID, 0);
5547 /* Re-enable ACS_SV if it was previously enabled */
5548 if (ctrl & PCI_ACS_SV)
5549 pci_write_config_word(bridge, pos + PCI_ACS_CTRL, ctrl);
5555 * Microsemi Switchtec NTB uses devfn proxy IDs to move TLPs between
5556 * NT endpoints via the internal switch fabric. These IDs replace the
5557 * originating requestor ID TLPs which access host memory on peer NTB
5558 * ports. Therefore, all proxy IDs must be aliased to the NTB device
5559 * to permit access when the IOMMU is turned on.
5561 static void quirk_switchtec_ntb_dma_alias(struct pci_dev *pdev)
5564 struct ntb_info_regs __iomem *mmio_ntb;
5565 struct ntb_ctrl_regs __iomem *mmio_ctrl;
5570 if (pci_enable_device(pdev)) {
5571 pci_err(pdev, "Cannot enable Switchtec device\n");
5575 mmio = pci_iomap(pdev, 0, 0);
5577 pci_disable_device(pdev);
5578 pci_err(pdev, "Cannot iomap Switchtec device\n");
5582 pci_info(pdev, "Setting Switchtec proxy ID aliases\n");
5584 mmio_ntb = mmio + SWITCHTEC_GAS_NTB_OFFSET;
5585 mmio_ctrl = (void __iomem *) mmio_ntb + SWITCHTEC_NTB_REG_CTRL_OFFSET;
5587 partition = ioread8(&mmio_ntb->partition_id);
5589 partition_map = ioread32(&mmio_ntb->ep_map);
5590 partition_map |= ((u64) ioread32(&mmio_ntb->ep_map + 4)) << 32;
5591 partition_map &= ~(1ULL << partition);
5593 for (pp = 0; pp < (sizeof(partition_map) * 8); pp++) {
5594 struct ntb_ctrl_regs __iomem *mmio_peer_ctrl;
5598 if (!(partition_map & (1ULL << pp)))
5601 pci_dbg(pdev, "Processing partition %d\n", pp);
5603 mmio_peer_ctrl = &mmio_ctrl[pp];
5605 table_sz = ioread16(&mmio_peer_ctrl->req_id_table_size);
5607 pci_warn(pdev, "Partition %d table_sz 0\n", pp);
5611 if (table_sz > 512) {
5613 "Invalid Switchtec partition %d table_sz %d\n",
5618 for (te = 0; te < table_sz; te++) {
5622 rid_entry = ioread32(&mmio_peer_ctrl->req_id_table[te]);
5623 devfn = (rid_entry >> 1) & 0xFF;
5625 "Aliasing Partition %d Proxy ID %02x.%d\n",
5626 pp, PCI_SLOT(devfn), PCI_FUNC(devfn));
5627 pci_add_dma_alias(pdev, devfn, 1);
5631 pci_iounmap(pdev, mmio);
5632 pci_disable_device(pdev);
5634 #define SWITCHTEC_QUIRK(vid) \
5635 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_MICROSEMI, vid, \
5636 PCI_CLASS_BRIDGE_OTHER, 8, quirk_switchtec_ntb_dma_alias)
5638 SWITCHTEC_QUIRK(0x8531); /* PFX 24xG3 */
5639 SWITCHTEC_QUIRK(0x8532); /* PFX 32xG3 */
5640 SWITCHTEC_QUIRK(0x8533); /* PFX 48xG3 */
5641 SWITCHTEC_QUIRK(0x8534); /* PFX 64xG3 */
5642 SWITCHTEC_QUIRK(0x8535); /* PFX 80xG3 */
5643 SWITCHTEC_QUIRK(0x8536); /* PFX 96xG3 */
5644 SWITCHTEC_QUIRK(0x8541); /* PSX 24xG3 */
5645 SWITCHTEC_QUIRK(0x8542); /* PSX 32xG3 */
5646 SWITCHTEC_QUIRK(0x8543); /* PSX 48xG3 */
5647 SWITCHTEC_QUIRK(0x8544); /* PSX 64xG3 */
5648 SWITCHTEC_QUIRK(0x8545); /* PSX 80xG3 */
5649 SWITCHTEC_QUIRK(0x8546); /* PSX 96xG3 */
5650 SWITCHTEC_QUIRK(0x8551); /* PAX 24XG3 */
5651 SWITCHTEC_QUIRK(0x8552); /* PAX 32XG3 */
5652 SWITCHTEC_QUIRK(0x8553); /* PAX 48XG3 */
5653 SWITCHTEC_QUIRK(0x8554); /* PAX 64XG3 */
5654 SWITCHTEC_QUIRK(0x8555); /* PAX 80XG3 */
5655 SWITCHTEC_QUIRK(0x8556); /* PAX 96XG3 */
5656 SWITCHTEC_QUIRK(0x8561); /* PFXL 24XG3 */
5657 SWITCHTEC_QUIRK(0x8562); /* PFXL 32XG3 */
5658 SWITCHTEC_QUIRK(0x8563); /* PFXL 48XG3 */
5659 SWITCHTEC_QUIRK(0x8564); /* PFXL 64XG3 */
5660 SWITCHTEC_QUIRK(0x8565); /* PFXL 80XG3 */
5661 SWITCHTEC_QUIRK(0x8566); /* PFXL 96XG3 */
5662 SWITCHTEC_QUIRK(0x8571); /* PFXI 24XG3 */
5663 SWITCHTEC_QUIRK(0x8572); /* PFXI 32XG3 */
5664 SWITCHTEC_QUIRK(0x8573); /* PFXI 48XG3 */
5665 SWITCHTEC_QUIRK(0x8574); /* PFXI 64XG3 */
5666 SWITCHTEC_QUIRK(0x8575); /* PFXI 80XG3 */
5667 SWITCHTEC_QUIRK(0x8576); /* PFXI 96XG3 */
5668 SWITCHTEC_QUIRK(0x4000); /* PFX 100XG4 */
5669 SWITCHTEC_QUIRK(0x4084); /* PFX 84XG4 */
5670 SWITCHTEC_QUIRK(0x4068); /* PFX 68XG4 */
5671 SWITCHTEC_QUIRK(0x4052); /* PFX 52XG4 */
5672 SWITCHTEC_QUIRK(0x4036); /* PFX 36XG4 */
5673 SWITCHTEC_QUIRK(0x4028); /* PFX 28XG4 */
5674 SWITCHTEC_QUIRK(0x4100); /* PSX 100XG4 */
5675 SWITCHTEC_QUIRK(0x4184); /* PSX 84XG4 */
5676 SWITCHTEC_QUIRK(0x4168); /* PSX 68XG4 */
5677 SWITCHTEC_QUIRK(0x4152); /* PSX 52XG4 */
5678 SWITCHTEC_QUIRK(0x4136); /* PSX 36XG4 */
5679 SWITCHTEC_QUIRK(0x4128); /* PSX 28XG4 */
5680 SWITCHTEC_QUIRK(0x4200); /* PAX 100XG4 */
5681 SWITCHTEC_QUIRK(0x4284); /* PAX 84XG4 */
5682 SWITCHTEC_QUIRK(0x4268); /* PAX 68XG4 */
5683 SWITCHTEC_QUIRK(0x4252); /* PAX 52XG4 */
5684 SWITCHTEC_QUIRK(0x4236); /* PAX 36XG4 */
5685 SWITCHTEC_QUIRK(0x4228); /* PAX 28XG4 */
5688 * The PLX NTB uses devfn proxy IDs to move TLPs between NT endpoints.
5689 * These IDs are used to forward responses to the originator on the other
5690 * side of the NTB. Alias all possible IDs to the NTB to permit access when
5691 * the IOMMU is turned on.
5693 static void quirk_plx_ntb_dma_alias(struct pci_dev *pdev)
5695 pci_info(pdev, "Setting PLX NTB proxy ID aliases\n");
5696 /* PLX NTB may use all 256 devfns */
5697 pci_add_dma_alias(pdev, 0, 256);
5699 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b0, quirk_plx_ntb_dma_alias);
5700 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b1, quirk_plx_ntb_dma_alias);
5703 * On Lenovo Thinkpad P50 SKUs with a Nvidia Quadro M1000M, the BIOS does
5704 * not always reset the secondary Nvidia GPU between reboots if the system
5705 * is configured to use Hybrid Graphics mode. This results in the GPU
5706 * being left in whatever state it was in during the *previous* boot, which
5707 * causes spurious interrupts from the GPU, which in turn causes us to
5708 * disable the wrong IRQ and end up breaking the touchpad. Unsurprisingly,
5709 * this also completely breaks nouveau.
5711 * Luckily, it seems a simple reset of the Nvidia GPU brings it back to a
5712 * clean state and fixes all these issues.
5714 * When the machine is configured in Dedicated display mode, the issue
5715 * doesn't occur. Fortunately the GPU advertises NoReset+ when in this
5716 * mode, so we can detect that and avoid resetting it.
5718 static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
5723 if (pdev->subsystem_vendor != PCI_VENDOR_ID_LENOVO ||
5724 pdev->subsystem_device != 0x222e ||
5725 !pci_reset_supported(pdev))
5728 if (pci_enable_device_mem(pdev))
5732 * Based on nvkm_device_ctor() in
5733 * drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
5735 map = pci_iomap(pdev, 0, 0x23000);
5737 pci_err(pdev, "Can't map MMIO space\n");
5742 * Make sure the GPU looks like it's been POSTed before resetting
5745 if (ioread32(map + 0x2240c) & 0x2) {
5746 pci_info(pdev, FW_BUG "GPU left initialized by EFI, resetting\n");
5747 ret = pci_reset_bus(pdev);
5749 pci_err(pdev, "Failed to reset GPU: %d\n", ret);
5754 pci_disable_device(pdev);
5756 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
5757 PCI_CLASS_DISPLAY_VGA, 8,
5758 quirk_reset_lenovo_thinkpad_p50_nvgpu);
5761 * Device [1b21:2142]
5762 * When in D0, PME# doesn't get asserted when plugging USB 3.0 device.
5764 static void pci_fixup_no_d0_pme(struct pci_dev *dev)
5766 pci_info(dev, "PME# does not work under D0, disabling it\n");
5767 dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
5769 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme);
5772 * Device 12d8:0x400e [OHCI] and 12d8:0x400f [EHCI]
5774 * These devices advertise PME# support in all power states but don't
5775 * reliably assert it.
5777 * These devices also advertise MSI, but documentation (PI7C9X440SL.pdf)
5778 * says "The MSI Function is not implemented on this device" in chapters
5779 * 7.3.27, 7.3.29-7.3.31.
5781 static void pci_fixup_no_msi_no_pme(struct pci_dev *dev)
5783 #ifdef CONFIG_PCI_MSI
5784 pci_info(dev, "MSI is not implemented on this device, disabling it\n");
5787 pci_info(dev, "PME# is unreliable, disabling it\n");
5788 dev->pme_support = 0;
5790 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_PERICOM, 0x400e, pci_fixup_no_msi_no_pme);
5791 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_PERICOM, 0x400f, pci_fixup_no_msi_no_pme);
5793 static void apex_pci_fixup_class(struct pci_dev *pdev)
5795 pdev->class = (PCI_CLASS_SYSTEM_OTHER << 8) | pdev->class;
5797 DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a,
5798 PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
5801 * Pericom PI7C9X2G404/PI7C9X2G304/PI7C9X2G303 switch erratum E5 -
5802 * ACS P2P Request Redirect is not functional
5804 * When ACS P2P Request Redirect is enabled and bandwidth is not balanced
5805 * between upstream and downstream ports, packets are queued in an internal
5806 * buffer until CPLD packet. The workaround is to use the switch in store and
5809 #define PI7C9X2Gxxx_MODE_REG 0x74
5810 #define PI7C9X2Gxxx_STORE_FORWARD_MODE BIT(0)
5811 static void pci_fixup_pericom_acs_store_forward(struct pci_dev *pdev)
5813 struct pci_dev *upstream;
5816 /* Downstream ports only */
5817 if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM)
5820 /* Check for ACS P2P Request Redirect use */
5823 pci_read_config_word(pdev, pdev->acs_cap + PCI_ACS_CTRL, &val);
5824 if (!(val & PCI_ACS_RR))
5827 upstream = pci_upstream_bridge(pdev);
5831 pci_read_config_word(upstream, PI7C9X2Gxxx_MODE_REG, &val);
5832 if (!(val & PI7C9X2Gxxx_STORE_FORWARD_MODE)) {
5833 pci_info(upstream, "Setting PI7C9X2Gxxx store-forward mode to avoid ACS erratum\n");
5834 pci_write_config_word(upstream, PI7C9X2Gxxx_MODE_REG, val |
5835 PI7C9X2Gxxx_STORE_FORWARD_MODE);
5839 * Apply fixup on enable and on resume, in order to apply the fix up whenever
5840 * ACS configuration changes or switch mode is reset
5842 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2404,
5843 pci_fixup_pericom_acs_store_forward);
5844 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2404,
5845 pci_fixup_pericom_acs_store_forward);
5846 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2304,
5847 pci_fixup_pericom_acs_store_forward);
5848 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2304,
5849 pci_fixup_pericom_acs_store_forward);
5850 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303,
5851 pci_fixup_pericom_acs_store_forward);
5852 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
5853 pci_fixup_pericom_acs_store_forward);
5855 static void nvidia_ion_ahci_fixup(struct pci_dev *pdev)
5857 pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
5859 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);