1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Exceptions for specific devices. Usually work-arounds for fatal design flaws.
4 */
5
6 #include <linux/bitfield.h>
7 #include <linux/delay.h>
8 #include <linux/dmi.h>
9 #include <linux/pci.h>
10 #include <linux/suspend.h>
11 #include <linux/vgaarb.h>
12 #include <asm/amd/node.h>
13 #include <asm/hpet.h>
14 #include <asm/pci_x86.h>
15
pci_fixup_i450nx(struct pci_dev * d)16 static void pci_fixup_i450nx(struct pci_dev *d)
17 {
18 /*
19 * i450NX -- Find and scan all secondary buses on all PXB's.
20 */
21 int pxb, reg;
22 u8 busno, suba, subb;
23
24 dev_warn(&d->dev, "Searching for i450NX host bridges\n");
25 reg = 0xd0;
26 for(pxb = 0; pxb < 2; pxb++) {
27 pci_read_config_byte(d, reg++, &busno);
28 pci_read_config_byte(d, reg++, &suba);
29 pci_read_config_byte(d, reg++, &subb);
30 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno,
31 suba, subb);
32 if (busno)
33 pcibios_scan_root(busno); /* Bus A */
34 if (suba < subb)
35 pcibios_scan_root(suba+1); /* Bus B */
36 }
37 pcibios_last_bus = -1;
38 }
39 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
40
pci_fixup_i450gx(struct pci_dev * d)41 static void pci_fixup_i450gx(struct pci_dev *d)
42 {
43 /*
44 * i450GX and i450KX -- Find and scan all secondary buses.
45 * (called separately for each PCI bridge found)
46 */
47 u8 busno;
48 pci_read_config_byte(d, 0x4a, &busno);
49 dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno);
50 pcibios_scan_root(busno);
51 pcibios_last_bus = -1;
52 }
53 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
54
pci_fixup_umc_ide(struct pci_dev * d)55 static void pci_fixup_umc_ide(struct pci_dev *d)
56 {
57 /*
58 * UM8886BF IDE controller sets region type bits incorrectly,
59 * therefore they look like memory despite of them being I/O.
60 */
61 int i;
62
63 dev_warn(&d->dev, "Fixing base address flags\n");
64 for(i = 0; i < 4; i++)
65 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
66 }
67 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
68
pci_fixup_latency(struct pci_dev * d)69 static void pci_fixup_latency(struct pci_dev *d)
70 {
71 /*
72 * SiS 5597 and 5598 chipsets require latency timer set to
73 * at most 32 to avoid lockups.
74 */
75 dev_dbg(&d->dev, "Setting max latency to 32\n");
76 pcibios_max_latency = 32;
77 }
78 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
79 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
80
pci_fixup_piix4_acpi(struct pci_dev * d)81 static void pci_fixup_piix4_acpi(struct pci_dev *d)
82 {
83 /*
84 * PIIX4 ACPI device: hardwired IRQ9
85 */
86 d->irq = 9;
87 }
88 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
89
90 /*
91 * Addresses issues with problems in the memory write queue timer in
92 * certain VIA Northbridges. This bugfix is per VIA's specifications,
93 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
94 * to trigger a bug in its integrated ProSavage video card, which
95 * causes screen corruption. We only clear bits 6 and 7 for that chipset,
96 * until VIA can provide us with definitive information on why screen
97 * corruption occurs, and what exactly those bits do.
98 *
99 * VIA 8363,8622,8361 Northbridges:
100 * - bits 5, 6, 7 at offset 0x55 need to be turned off
101 * VIA 8367 (KT266x) Northbridges:
102 * - bits 5, 6, 7 at offset 0x95 need to be turned off
103 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
104 * - bits 6, 7 at offset 0x55 need to be turned off
105 */
106
107 #define VIA_8363_KL133_REVISION_ID 0x81
108 #define VIA_8363_KM133_REVISION_ID 0x84
109
pci_fixup_via_northbridge_bug(struct pci_dev * d)110 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
111 {
112 u8 v;
113 int where = 0x55;
114 int mask = 0x1f; /* clear bits 5, 6, 7 by default */
115
116 if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
117 /* fix pci bus latency issues resulted by NB bios error
118 it appears on bug free^Wreduced kt266x's bios forces
119 NB latency to zero */
120 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
121
122 where = 0x95; /* the memory write queue timer register is
123 different for the KT266x's: 0x95 not 0x55 */
124 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
125 (d->revision == VIA_8363_KL133_REVISION_ID ||
126 d->revision == VIA_8363_KM133_REVISION_ID)) {
127 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
128 causes screen corruption on the KL133/KM133 */
129 }
130
131 pci_read_config_byte(d, where, &v);
132 if (v & ~mask) {
133 dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
134 d->device, d->revision, where, v, mask, v & mask);
135 v &= mask;
136 pci_write_config_byte(d, where, v);
137 }
138 }
139 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
140 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
141 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
142 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
143 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
144 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
145 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
146 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
147
148 /*
149 * For some reasons Intel decided that certain parts of their
150 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
151 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
152 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
153 * to Intel terminology. These devices do forward all addresses from
154 * system to PCI bus no matter what are their window settings, so they are
155 * "transparent" (or subtractive decoding) from programmers point of view.
156 */
pci_fixup_transparent_bridge(struct pci_dev * dev)157 static void pci_fixup_transparent_bridge(struct pci_dev *dev)
158 {
159 if ((dev->device & 0xff00) == 0x2400)
160 dev->transparent = 1;
161 }
162 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
163 PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge);
164
165 /*
166 * Fixup for C1 Halt Disconnect problem on nForce2 systems.
167 *
168 * From information provided by "Allen Martin" <AMartin@nvidia.com>:
169 *
170 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
171 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
172 * This allows the state-machine and timer to return to a proper state within
173 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not
174 * issue another HALT within 80 ns of the initial HALT, the failure condition
175 * is avoided.
176 */
pci_fixup_nforce2(struct pci_dev * dev)177 static void pci_fixup_nforce2(struct pci_dev *dev)
178 {
179 u32 val;
180
181 /*
182 * Chip Old value New value
183 * C17 0x1F0FFF01 0x1F01FF01
184 * C18D 0x9F0FFF01 0x9F01FF01
185 *
186 * Northbridge chip version may be determined by
187 * reading the PCI revision ID (0xC1 or greater is C18D).
188 */
189 pci_read_config_dword(dev, 0x6c, &val);
190
191 /*
192 * Apply fixup if needed, but don't touch disconnect state
193 */
194 if ((val & 0x00FF0000) != 0x00010000) {
195 dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n");
196 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
197 }
198 }
199 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
200 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
201
202 /* Max PCI Express root ports */
203 #define MAX_PCIEROOT 6
204 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
205
206 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
207
quirk_pcie_aspm_read(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * value)208 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
209 {
210 return raw_pci_read(pci_domain_nr(bus), bus->number,
211 devfn, where, size, value);
212 }
213
214 /*
215 * Replace the original pci bus ops for write with a new one that will filter
216 * the request to insure ASPM cannot be enabled.
217 */
quirk_pcie_aspm_write(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 value)218 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
219 {
220 u8 offset;
221
222 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
223
224 if ((offset) && (where == offset))
225 value = value & ~PCI_EXP_LNKCTL_ASPMC;
226
227 return raw_pci_write(pci_domain_nr(bus), bus->number,
228 devfn, where, size, value);
229 }
230
231 static struct pci_ops quirk_pcie_aspm_ops = {
232 .read = quirk_pcie_aspm_read,
233 .write = quirk_pcie_aspm_write,
234 };
235
236 /*
237 * Prevents PCI Express ASPM (Active State Power Management) being enabled.
238 *
239 * Save the register offset, where the ASPM control bits are located,
240 * for each PCI Express device that is in the device list of
241 * the root port in an array for fast indexing. Replace the bus ops
242 * with the modified one.
243 */
pcie_rootport_aspm_quirk(struct pci_dev * pdev)244 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
245 {
246 int i;
247 struct pci_bus *pbus;
248 struct pci_dev *dev;
249
250 if ((pbus = pdev->subordinate) == NULL)
251 return;
252
253 /*
254 * Check if the DID of pdev matches one of the six root ports. This
255 * check is needed in the case this function is called directly by the
256 * hot-plug driver.
257 */
258 if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
259 (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
260 return;
261
262 if (list_empty(&pbus->devices)) {
263 /*
264 * If no device is attached to the root port at power-up or
265 * after hot-remove, the pbus->devices is empty and this code
266 * will set the offsets to zero and the bus ops to parent's bus
267 * ops, which is unmodified.
268 */
269 for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
270 quirk_aspm_offset[i] = 0;
271
272 pci_bus_set_ops(pbus, pbus->parent->ops);
273 } else {
274 /*
275 * If devices are attached to the root port at power-up or
276 * after hot-add, the code loops through the device list of
277 * each root port to save the register offsets and replace the
278 * bus ops.
279 */
280 list_for_each_entry(dev, &pbus->devices, bus_list)
281 /* There are 0 to 8 devices attached to this bus */
282 quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] =
283 dev->pcie_cap + PCI_EXP_LNKCTL;
284
285 pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops);
286 dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n");
287 }
288
289 }
290 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk);
291 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk);
292 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk);
293 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk);
294 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk);
295 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk);
296
297 /*
298 * PCIe devices underneath Xeon 6 PCIe Root Port bifurcated to x2 have lower
299 * performance with Extended Tags and MRRS > 128B. Work around the performance
300 * problems by disabling Extended Tags and limiting MRRS to 128B.
301 *
302 * https://cdrdv2.intel.com/v1/dl/getContent/837176
303 */
limit_mrrs_to_128(struct pci_host_bridge * b,struct pci_dev * pdev)304 static int limit_mrrs_to_128(struct pci_host_bridge *b, struct pci_dev *pdev)
305 {
306 int readrq = pcie_get_readrq(pdev);
307
308 if (readrq > 128)
309 pcie_set_readrq(pdev, 128);
310
311 return 0;
312 }
313
pci_xeon_x2_bifurc_quirk(struct pci_dev * pdev)314 static void pci_xeon_x2_bifurc_quirk(struct pci_dev *pdev)
315 {
316 struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);
317 u32 linkcap;
318
319 pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &linkcap);
320 if (FIELD_GET(PCI_EXP_LNKCAP_MLW, linkcap) != 0x2)
321 return;
322
323 bridge->no_ext_tags = 1;
324 bridge->enable_device = limit_mrrs_to_128;
325 pci_info(pdev, "Disabling Extended Tags and limiting MRRS to 128B (performance reasons due to x2 PCIe link)\n");
326 }
327
328 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db0, pci_xeon_x2_bifurc_quirk);
329 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db1, pci_xeon_x2_bifurc_quirk);
330 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db2, pci_xeon_x2_bifurc_quirk);
331 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db3, pci_xeon_x2_bifurc_quirk);
332 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db6, pci_xeon_x2_bifurc_quirk);
333 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db7, pci_xeon_x2_bifurc_quirk);
334 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db8, pci_xeon_x2_bifurc_quirk);
335 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0db9, pci_xeon_x2_bifurc_quirk);
336
337 /*
338 * Fixup to mark boot BIOS video selected by BIOS before it changes
339 *
340 * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
341 *
342 * The standard boot ROM sequence for an x86 machine uses the BIOS
343 * to select an initial video card for boot display. This boot video
344 * card will have its BIOS copied to 0xC0000 in system RAM.
345 * IORESOURCE_ROM_SHADOW is used to associate the boot video
346 * card with this copy. On laptops this copy has to be used since
347 * the main ROM may be compressed or combined with another image.
348 * See pci_map_rom() for use of this flag. Before marking the device
349 * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set
350 * by either arch code or vga-arbitration; if so only apply the fixup to this
351 * already-determined primary video card.
352 */
353
pci_fixup_video(struct pci_dev * pdev)354 static void pci_fixup_video(struct pci_dev *pdev)
355 {
356 struct pci_dev *bridge;
357 struct pci_bus *bus;
358 u16 config;
359 struct resource *res;
360
361 /* Is VGA routed to us? */
362 bus = pdev->bus;
363 while (bus) {
364 bridge = bus->self;
365
366 /*
367 * From information provided by
368 * "David Miller" <davem@davemloft.net>
369 * The bridge control register is valid for PCI header
370 * type BRIDGE, or CARDBUS. Host to PCI controllers use
371 * PCI header type NORMAL.
372 */
373 if (bridge && (pci_is_bridge(bridge))) {
374 pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
375 &config);
376 if (!(config & PCI_BRIDGE_CTL_VGA))
377 return;
378 }
379 bus = bus->parent;
380 }
381 if (!vga_default_device() || pdev == vga_default_device()) {
382 pci_read_config_word(pdev, PCI_COMMAND, &config);
383 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
384 res = &pdev->resource[PCI_ROM_RESOURCE];
385
386 pci_disable_rom(pdev);
387 if (res->parent)
388 release_resource(res);
389
390 res->start = 0xC0000;
391 res->end = res->start + 0x20000 - 1;
392 res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
393 IORESOURCE_PCI_FIXED;
394 dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n",
395 res);
396 }
397 }
398 }
399 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID,
400 PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
401
402
403 static const struct dmi_system_id msi_k8t_dmi_table[] = {
404 {
405 .ident = "MSI-K8T-Neo2Fir",
406 .matches = {
407 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
408 DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
409 },
410 },
411 {}
412 };
413
414 /*
415 * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
416 * card if a PCI-soundcard is added.
417 *
418 * The BIOS only gives options "DISABLED" and "AUTO". This code sets
419 * the corresponding register-value to enable the soundcard.
420 *
421 * The soundcard is only enabled, if the mainboard is identified
422 * via DMI-tables and the soundcard is detected to be off.
423 */
pci_fixup_msi_k8t_onboard_sound(struct pci_dev * dev)424 static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
425 {
426 unsigned char val;
427 if (!dmi_check_system(msi_k8t_dmi_table))
428 return; /* only applies to MSI K8T Neo2-FIR */
429
430 pci_read_config_byte(dev, 0x50, &val);
431 if (val & 0x40) {
432 pci_write_config_byte(dev, 0x50, val & (~0x40));
433
434 /* verify the change for status output */
435 pci_read_config_byte(dev, 0x50, &val);
436 if (val & 0x40)
437 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
438 "can't enable onboard soundcard!\n");
439 else
440 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
441 "enabled onboard soundcard\n");
442 }
443 }
444 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
445 pci_fixup_msi_k8t_onboard_sound);
446 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
447 pci_fixup_msi_k8t_onboard_sound);
448
449 /*
450 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
451 *
452 * We pretend to bring them out of full D3 state, and restore the proper
453 * IRQ, PCI cache line size, and BARs, otherwise the device won't function
454 * properly. In some cases, the device will generate an interrupt on
455 * the wrong IRQ line, causing any devices sharing the line it's
456 * *supposed* to use to be disabled by the kernel's IRQ debug code.
457 */
458 static u16 toshiba_line_size;
459
460 static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = {
461 {
462 .ident = "Toshiba PS5 based laptop",
463 .matches = {
464 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
465 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
466 },
467 },
468 {
469 .ident = "Toshiba PSM4 based laptop",
470 .matches = {
471 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
472 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
473 },
474 },
475 {
476 .ident = "Toshiba A40 based laptop",
477 .matches = {
478 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
479 DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
480 },
481 },
482 { }
483 };
484
pci_pre_fixup_toshiba_ohci1394(struct pci_dev * dev)485 static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
486 {
487 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
488 return; /* only applies to certain Toshibas (so far) */
489
490 dev->current_state = PCI_D3cold;
491 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
492 }
493 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
494 pci_pre_fixup_toshiba_ohci1394);
495
pci_post_fixup_toshiba_ohci1394(struct pci_dev * dev)496 static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
497 {
498 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
499 return; /* only applies to certain Toshibas (so far) */
500
501 /* Restore config space on Toshiba laptops */
502 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
503 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
504 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
505 pci_resource_start(dev, 0));
506 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
507 pci_resource_start(dev, 1));
508 }
509 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
510 pci_post_fixup_toshiba_ohci1394);
511
512
513 /*
514 * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
515 * configuration space.
516 */
pci_early_fixup_cyrix_5530(struct pci_dev * dev)517 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
518 {
519 u8 r;
520 /* clear 'F4 Video Configuration Trap' bit */
521 pci_read_config_byte(dev, 0x42, &r);
522 r &= 0xfd;
523 pci_write_config_byte(dev, 0x42, r);
524 }
525 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
526 pci_early_fixup_cyrix_5530);
527 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
528 pci_early_fixup_cyrix_5530);
529
530 /*
531 * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
532 * prevent update of the BAR0, which doesn't look like a normal BAR.
533 */
pci_siemens_interrupt_controller(struct pci_dev * dev)534 static void pci_siemens_interrupt_controller(struct pci_dev *dev)
535 {
536 dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
537 }
538 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
539 pci_siemens_interrupt_controller);
540
541 /*
542 * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
543 * confusing the PCI engine:
544 */
sb600_disable_hpet_bar(struct pci_dev * dev)545 static void sb600_disable_hpet_bar(struct pci_dev *dev)
546 {
547 u8 val;
548
549 /*
550 * The SB600 and SB700 both share the same device
551 * ID, but the PM register 0x55 does something different
552 * for the SB700, so make sure we are dealing with the
553 * SB600 before touching the bit:
554 */
555
556 pci_read_config_byte(dev, 0x08, &val);
557
558 if (val < 0x2F) {
559 outb(0x55, 0xCD6);
560 val = inb(0xCD7);
561
562 /* Set bit 7 in PM register 0x55 */
563 outb(0x55, 0xCD6);
564 outb(val | 0x80, 0xCD7);
565 }
566 }
567 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
568
569 #ifdef CONFIG_HPET_TIMER
sb600_hpet_quirk(struct pci_dev * dev)570 static void sb600_hpet_quirk(struct pci_dev *dev)
571 {
572 struct resource *r = &dev->resource[1];
573
574 if (r->flags & IORESOURCE_MEM && r->start == hpet_address) {
575 r->flags |= IORESOURCE_PCI_FIXED;
576 dev_info(&dev->dev, "reg 0x14 contains HPET; making it immovable\n");
577 }
578 }
579 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x4385, sb600_hpet_quirk);
580 #endif
581
582 /*
583 * Twinhead H12Y needs us to block out a region otherwise we map devices
584 * there and any access kills the box.
585 *
586 * See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
587 *
588 * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
589 */
twinhead_reserve_killing_zone(struct pci_dev * dev)590 static void twinhead_reserve_killing_zone(struct pci_dev *dev)
591 {
592 if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) {
593 pr_info("Reserving memory on Twinhead H12Y\n");
594 request_mem_region(0xFFB00000, 0x100000, "twinhead");
595 }
596 }
597 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);
598
599 /*
600 * Device [8086:2fc0]
601 * Erratum HSE43
602 * CONFIG_TDP_NOMINAL CSR Implemented at Incorrect Offset
603 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
604 *
605 * Devices [8086:6f60,6fa0,6fc0]
606 * Erratum BDF2
607 * PCI BARs in the Home Agent Will Return Non-Zero Values During Enumeration
608 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
609 */
pci_invalid_bar(struct pci_dev * dev)610 static void pci_invalid_bar(struct pci_dev *dev)
611 {
612 dev->non_compliant_bars = 1;
613 }
614 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar);
615 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar);
616 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar);
617 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar);
618 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ec, pci_invalid_bar);
619 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ed, pci_invalid_bar);
620 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26c, pci_invalid_bar);
621 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26d, pci_invalid_bar);
622
623 /*
624 * Device [1022:7808]
625 * 23. USB Wake on Connect/Disconnect with Low Speed Devices
626 * https://support.amd.com/TechDocs/46837.pdf
627 * Appendix A2
628 * https://support.amd.com/TechDocs/42413.pdf
629 */
pci_fixup_amd_ehci_pme(struct pci_dev * dev)630 static void pci_fixup_amd_ehci_pme(struct pci_dev *dev)
631 {
632 dev_info(&dev->dev, "PME# does not work under D3, disabling it\n");
633 dev->pme_support &= ~((PCI_PM_CAP_PME_D3hot | PCI_PM_CAP_PME_D3cold)
634 >> PCI_PM_CAP_PME_SHIFT);
635 }
636 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme);
637
638 /*
639 * Device [1022:7914]
640 * When in D0, PME# doesn't get asserted when plugging USB 2.0 device.
641 */
pci_fixup_amd_fch_xhci_pme(struct pci_dev * dev)642 static void pci_fixup_amd_fch_xhci_pme(struct pci_dev *dev)
643 {
644 dev_info(&dev->dev, "PME# does not work under D0, disabling it\n");
645 dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
646 }
647 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7914, pci_fixup_amd_fch_xhci_pme);
648
649 /*
650 * Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff]
651 *
652 * Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to
653 * the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used
654 * for soft poweroff and suspend-to-RAM.
655 *
656 * As far as we know, this is related to the address space, not to the Root
657 * Port itself. Attaching the quirk to the Root Port is a convenience, but
658 * it could probably also be a standalone DMI quirk.
659 *
660 * https://bugzilla.kernel.org/show_bug.cgi?id=103211
661 */
quirk_apple_mbp_poweroff(struct pci_dev * pdev)662 static void quirk_apple_mbp_poweroff(struct pci_dev *pdev)
663 {
664 struct device *dev = &pdev->dev;
665 struct resource *res;
666
667 if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") &&
668 !dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) ||
669 pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0))
670 return;
671
672 res = request_mem_region(0x7fa00000, 0x200000,
673 "MacBook Pro poweroff workaround");
674 if (res)
675 dev_info(dev, "claimed %s %pR\n", res->name, res);
676 else
677 dev_info(dev, "can't work around MacBook Pro poweroff issue\n");
678 }
679 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff);
680
681 /*
682 * VMD-enabled root ports will change the source ID for all messages
683 * to the VMD device. Rather than doing device matching with the source
684 * ID, the AER driver should traverse the child device tree, reading
685 * AER registers to find the faulting device.
686 */
quirk_no_aersid(struct pci_dev * pdev)687 static void quirk_no_aersid(struct pci_dev *pdev)
688 {
689 /* VMD Domain */
690 if (is_vmd(pdev->bus) && pci_is_root_bus(pdev->bus))
691 pdev->bus->bus_flags |= PCI_BUS_FLAGS_NO_AERSID;
692 }
693 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
694 PCI_CLASS_BRIDGE_PCI, 8, quirk_no_aersid);
695
quirk_intel_th_dnv(struct pci_dev * dev)696 static void quirk_intel_th_dnv(struct pci_dev *dev)
697 {
698 struct resource *r = &dev->resource[4];
699
700 /*
701 * Denverton reports 2k of RTIT_BAR (intel_th resource 4), which
702 * appears to be 4 MB in reality.
703 */
704 if (r->end == r->start + 0x7ff) {
705 r->start = 0;
706 r->end = 0x3fffff;
707 r->flags |= IORESOURCE_UNSET;
708 }
709 }
710 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x19e1, quirk_intel_th_dnv);
711
712 #ifdef CONFIG_PHYS_ADDR_T_64BIT
713
714 #define AMD_141b_MMIO_BASE(x) (0x80 + (x) * 0x8)
715 #define AMD_141b_MMIO_BASE_RE_MASK BIT(0)
716 #define AMD_141b_MMIO_BASE_WE_MASK BIT(1)
717 #define AMD_141b_MMIO_BASE_MMIOBASE_MASK GENMASK(31,8)
718
719 #define AMD_141b_MMIO_LIMIT(x) (0x84 + (x) * 0x8)
720 #define AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK GENMASK(31,8)
721
722 #define AMD_141b_MMIO_HIGH(x) (0x180 + (x) * 0x4)
723 #define AMD_141b_MMIO_HIGH_MMIOBASE_MASK GENMASK(7,0)
724 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT 16
725 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK GENMASK(23,16)
726
727 /*
728 * The PCI Firmware Spec, rev 3.2, notes that ACPI should optionally allow
729 * configuring host bridge windows using the _PRS and _SRS methods.
730 *
731 * But this is rarely implemented, so we manually enable a large 64bit BAR for
732 * PCIe device on AMD Family 15h (Models 00h-1fh, 30h-3fh, 60h-7fh) Processors
733 * here.
734 */
pci_amd_enable_64bit_bar(struct pci_dev * dev)735 static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
736 {
737 static const char *name = "PCI Bus 0000:00";
738 struct resource *res, *conflict;
739 u32 base, limit, high;
740 struct pci_dev *other;
741 unsigned i;
742
743 if (!(pci_probe & PCI_BIG_ROOT_WINDOW))
744 return;
745
746 /* Check that we are the only device of that type */
747 other = pci_get_device(dev->vendor, dev->device, NULL);
748 if (other != dev ||
749 (other = pci_get_device(dev->vendor, dev->device, other))) {
750 /* This is a multi-socket system, don't touch it for now */
751 pci_dev_put(other);
752 return;
753 }
754
755 for (i = 0; i < 8; i++) {
756 pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base);
757 pci_read_config_dword(dev, AMD_141b_MMIO_HIGH(i), &high);
758
759 /* Is this slot free? */
760 if (!(base & (AMD_141b_MMIO_BASE_RE_MASK |
761 AMD_141b_MMIO_BASE_WE_MASK)))
762 break;
763
764 base >>= 8;
765 base |= high << 24;
766
767 /* Abort if a slot already configures a 64bit BAR. */
768 if (base > 0x10000)
769 return;
770 }
771 if (i == 8)
772 return;
773
774 res = kzalloc(sizeof(*res), GFP_KERNEL);
775 if (!res)
776 return;
777
778 /*
779 * Allocate a 256GB window directly below the 0xfd00000000 hardware
780 * limit (see AMD Family 15h Models 30h-3Fh BKDG, sec 2.4.6).
781 */
782 res->name = name;
783 res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
784 IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
785 res->start = 0xbd00000000ull;
786 res->end = 0xfd00000000ull - 1;
787
788 conflict = request_resource_conflict(&iomem_resource, res);
789 if (conflict) {
790 kfree(res);
791 if (conflict->name != name)
792 return;
793
794 /* We are resuming from suspend; just reenable the window */
795 res = conflict;
796 } else {
797 dev_info(&dev->dev, "adding root bus resource %pR (tainting kernel)\n",
798 res);
799 add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
800 pci_bus_add_resource(dev->bus, res);
801 }
802
803 base = ((res->start >> 8) & AMD_141b_MMIO_BASE_MMIOBASE_MASK) |
804 AMD_141b_MMIO_BASE_RE_MASK | AMD_141b_MMIO_BASE_WE_MASK;
805 limit = ((res->end + 1) >> 8) & AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK;
806 high = ((res->start >> 40) & AMD_141b_MMIO_HIGH_MMIOBASE_MASK) |
807 ((((res->end + 1) >> 40) << AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT)
808 & AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK);
809
810 pci_write_config_dword(dev, AMD_141b_MMIO_HIGH(i), high);
811 pci_write_config_dword(dev, AMD_141b_MMIO_LIMIT(i), limit);
812 pci_write_config_dword(dev, AMD_141b_MMIO_BASE(i), base);
813 }
814 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
815 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
816 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
817 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
818 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
819 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
820 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
821 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
822 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
823 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
824
825 #define RS690_LOWER_TOP_OF_DRAM2 0x30
826 #define RS690_LOWER_TOP_OF_DRAM2_VALID 0x1
827 #define RS690_UPPER_TOP_OF_DRAM2 0x31
828 #define RS690_HTIU_NB_INDEX 0xA8
829 #define RS690_HTIU_NB_INDEX_WR_ENABLE 0x100
830 #define RS690_HTIU_NB_DATA 0xAC
831
832 /*
833 * Some BIOS implementations support RAM above 4GB, but do not configure the
834 * PCI host to respond to bus master accesses for these addresses. These
835 * implementations set the TOP_OF_DRAM_SLOT1 register correctly, so PCI DMA
836 * works as expected for addresses below 4GB.
837 *
838 * Reference: "AMD RS690 ASIC Family Register Reference Guide" (pg. 2-57)
839 * https://www.amd.com/system/files/TechDocs/43372_rs690_rrg_3.00o.pdf
840 */
rs690_fix_64bit_dma(struct pci_dev * pdev)841 static void rs690_fix_64bit_dma(struct pci_dev *pdev)
842 {
843 u32 val = 0;
844 phys_addr_t top_of_dram = __pa(high_memory - 1) + 1;
845
846 if (top_of_dram <= (1ULL << 32))
847 return;
848
849 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
850 RS690_LOWER_TOP_OF_DRAM2);
851 pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val);
852
853 if (val)
854 return;
855
856 pci_info(pdev, "Adjusting top of DRAM to %pa for 64-bit DMA support\n", &top_of_dram);
857
858 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
859 RS690_UPPER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
860 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32);
861
862 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
863 RS690_LOWER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
864 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA,
865 top_of_dram | RS690_LOWER_TOP_OF_DRAM2_VALID);
866 }
867 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
868
869 #endif
870
871 #ifdef CONFIG_AMD_NODE
872
873 #define AMD_15B8_RCC_DEV2_EPF0_STRAP2 0x10136008
874 #define AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK 0x00000080L
875
quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev * dev)876 static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev)
877 {
878 u32 data;
879
880 if (!amd_smn_read(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, &data)) {
881 data &= ~AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK;
882 if (amd_smn_write(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, data))
883 pci_err(dev, "Failed to write data 0x%x\n", data);
884 } else {
885 pci_err(dev, "Failed to read data\n");
886 }
887 }
888 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b8, quirk_clear_strap_no_soft_reset_dev2_f0);
889 #endif
890
891 /*
892 * When returning from D3cold to D0, firmware on some Google Coral and Reef
893 * family Chromebooks with Intel Apollo Lake SoC clobbers the headers of
894 * both the L1 PM Substates capability and the previous capability for the
895 * "Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port B #1".
896 *
897 * Save those values at enumeration-time and restore them at resume.
898 */
899
900 static u16 prev_cap, l1ss_cap;
901 static u32 prev_header, l1ss_header;
902
chromeos_save_apl_pci_l1ss_capability(struct pci_dev * dev)903 static void chromeos_save_apl_pci_l1ss_capability(struct pci_dev *dev)
904 {
905 int pos = PCI_CFG_SPACE_SIZE, prev = 0;
906 u32 header, pheader = 0;
907
908 while (pos) {
909 pci_read_config_dword(dev, pos, &header);
910 if (PCI_EXT_CAP_ID(header) == PCI_EXT_CAP_ID_L1SS) {
911 prev_cap = prev;
912 prev_header = pheader;
913 l1ss_cap = pos;
914 l1ss_header = header;
915 return;
916 }
917
918 prev = pos;
919 pheader = header;
920 pos = PCI_EXT_CAP_NEXT(header);
921 }
922 }
923
chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev * dev)924 static void chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev *dev)
925 {
926 u32 header;
927
928 if (!prev_cap || !prev_header || !l1ss_cap || !l1ss_header)
929 return;
930
931 /* Fixup the header of L1SS Capability if missing */
932 pci_read_config_dword(dev, l1ss_cap, &header);
933 if (header != l1ss_header) {
934 pci_write_config_dword(dev, l1ss_cap, l1ss_header);
935 pci_info(dev, "restore L1SS Capability header (was %#010x now %#010x)\n",
936 header, l1ss_header);
937 }
938
939 /* Fixup the link to L1SS Capability if missing */
940 pci_read_config_dword(dev, prev_cap, &header);
941 if (header != prev_header) {
942 pci_write_config_dword(dev, prev_cap, prev_header);
943 pci_info(dev, "restore previous Capability header (was %#010x now %#010x)\n",
944 header, prev_header);
945 }
946 }
947 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_save_apl_pci_l1ss_capability);
948 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_fixup_apl_pci_l1ss_capability);
949
950 /*
951 * Disable D3cold on Asus B1400 PCI-NVMe bridge
952 *
953 * On this platform with VMD off, the NVMe device cannot successfully power
954 * back on from D3cold. This appears to be an untested transition by the
955 * vendor: Windows leaves the NVMe and parent bridge in D0 during suspend.
956 *
957 * We disable D3cold on the parent bridge for simplicity, and the fact that
958 * both parent bridge and NVMe device share the same power resource.
959 *
960 * This is only needed on BIOS versions before 308; the newer versions flip
961 * StorageD3Enable from 1 to 0.
962 */
963 static const struct dmi_system_id asus_nvme_broken_d3cold_table[] = {
964 {
965 .matches = {
966 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
967 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.304"),
968 },
969 },
970 {
971 .matches = {
972 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
973 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.305"),
974 },
975 },
976 {
977 .matches = {
978 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
979 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.306"),
980 },
981 },
982 {
983 .matches = {
984 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
985 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.307"),
986 },
987 },
988 {}
989 };
990
asus_disable_nvme_d3cold(struct pci_dev * pdev)991 static void asus_disable_nvme_d3cold(struct pci_dev *pdev)
992 {
993 if (dmi_check_system(asus_nvme_broken_d3cold_table) > 0)
994 pci_d3cold_disable(pdev);
995 }
996 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x9a09, asus_disable_nvme_d3cold);
997
998 #ifdef CONFIG_SUSPEND
999 /*
1000 * Root Ports on some AMD SoCs advertise PME_Support for D3hot and D3cold, but
1001 * if the SoC is put into a hardware sleep state by the amd-pmc driver, the
1002 * Root Ports don't generate wakeup interrupts for USB devices.
1003 *
1004 * When suspending, remove D3hot and D3cold from the PME_Support advertised
1005 * by the Root Port so we don't use those states if we're expecting wakeup
1006 * interrupts. Restore the advertised PME_Support when resuming.
1007 */
amd_rp_pme_suspend(struct pci_dev * dev)1008 static void amd_rp_pme_suspend(struct pci_dev *dev)
1009 {
1010 struct pci_dev *rp;
1011
1012 /*
1013 * If system suspend is not in progress, we're doing runtime suspend, so
1014 * amd-pmc will not be involved so PMEs during D3 work as advertised.
1015 *
1016 * The PMEs *do* work if amd-pmc doesn't put the SoC in the hardware
1017 * sleep state, but we assume amd-pmc is always present.
1018 */
1019 if (!pm_suspend_in_progress())
1020 return;
1021
1022 rp = pcie_find_root_port(dev);
1023 if (!rp || !rp->pm_cap)
1024 return;
1025
1026 rp->pme_support &= ~((PCI_PM_CAP_PME_D3hot|PCI_PM_CAP_PME_D3cold) >>
1027 PCI_PM_CAP_PME_SHIFT);
1028 dev_info_once(&rp->dev, "quirk: disabling D3cold for suspend\n");
1029 }
1030
amd_rp_pme_resume(struct pci_dev * dev)1031 static void amd_rp_pme_resume(struct pci_dev *dev)
1032 {
1033 struct pci_dev *rp;
1034 u16 pmc;
1035
1036 rp = pcie_find_root_port(dev);
1037 if (!rp || !rp->pm_cap)
1038 return;
1039
1040 pci_read_config_word(rp, rp->pm_cap + PCI_PM_PMC, &pmc);
1041 rp->pme_support = FIELD_GET(PCI_PM_CAP_PME_MASK, pmc);
1042 }
1043 /* Rembrandt (yellow_carp) */
1044 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x162e, amd_rp_pme_suspend);
1045 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x162e, amd_rp_pme_resume);
1046 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x162f, amd_rp_pme_suspend);
1047 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x162f, amd_rp_pme_resume);
1048 /* Phoenix (pink_sardine) */
1049 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x1668, amd_rp_pme_suspend);
1050 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1668, amd_rp_pme_resume);
1051 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_suspend);
1052 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_resume);
1053
1054 /*
1055 * Putting PCIe root ports on Ryzen SoCs with USB4 controllers into D3hot
1056 * may cause problems when the system attempts wake up from s2idle.
1057 *
1058 * On the TUXEDO Sirius 16 Gen 1 with a specific old BIOS this manifests as
1059 * a system hang.
1060 */
1061 static const struct dmi_system_id quirk_tuxeo_rp_d3_dmi_table[] = {
1062 {
1063 .matches = {
1064 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
1065 DMI_EXACT_MATCH(DMI_BOARD_NAME, "APX958"),
1066 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "V1.00A00_20240108"),
1067 },
1068 },
1069 {}
1070 };
1071
quirk_tuxeo_rp_d3(struct pci_dev * pdev)1072 static void quirk_tuxeo_rp_d3(struct pci_dev *pdev)
1073 {
1074 struct pci_dev *root_pdev;
1075
1076 if (dmi_check_system(quirk_tuxeo_rp_d3_dmi_table)) {
1077 root_pdev = pcie_find_root_port(pdev);
1078 if (root_pdev)
1079 root_pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
1080 }
1081 }
1082 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1502, quirk_tuxeo_rp_d3);
1083 #endif /* CONFIG_SUSPEND */
1084