arch/x86/kernel/quirks.c

   1 /*
   2  * This file contains work-arounds for x86 and x86_64 platform bugs.
   3  */
   4 #include <linux/pci.h>
   5 #include <linux/irq.h>
   6
   7 #include <asm/hpet.h>
   8
   9 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
  10
  11 static void quirk_intel_irqbalance(struct pci_dev *dev)
  12 {
  13         u8 config;
  14         u16 word;
  15
  16         /* BIOS may enable hardware IRQ balancing for
  17          * E7520/E7320/E7525(revision ID 0x9 and below)
  18          * based platforms.
  19          * Disable SW irqbalance/affinity on those platforms.
  20          */
  21         if (dev->revision > 0x9)
  22                 return;
  23
  24         /* enable access to config space*/
  25         pci_read_config_byte(dev, 0xf4, &config);
  26         pci_write_config_byte(dev, 0xf4, config|0x2);
  27
  28         /*
  29          * read xTPR register.  We may not have a pci_dev for device 8
  30          * because it might be hidden until the above write.
  31          */
  32         pci_bus_read_config_word(dev->bus, PCI_DEVFN(8, 0), 0x4c, &word);
  33
  34         if (!(word & (1 << 13))) {
  35                 dev_info(&dev->dev, "Intel E7520/7320/7525 detected; "
  36                         "disabling irq balancing and affinity\n");
  37                 noirqdebug_setup("");
  38 #ifdef CONFIG_PROC_FS
  39                 no_irq_affinity = 1;
  40 #endif
  41         }
  42
  43         /* put back the original value for config space*/
  44         if (!(config & 0x2))
  45                 pci_write_config_byte(dev, 0xf4, config);
  46 }
  47 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
  48                         quirk_intel_irqbalance);
  49 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
  50                         quirk_intel_irqbalance);
  51 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
  52                         quirk_intel_irqbalance);
  53 #endif
  54
  55 #if defined(CONFIG_HPET_TIMER)
  56 unsigned long force_hpet_address;
  57
  58 static enum {
  59         NONE_FORCE_HPET_RESUME,
  60         OLD_ICH_FORCE_HPET_RESUME,
  61         ICH_FORCE_HPET_RESUME,
  62         VT8237_FORCE_HPET_RESUME,
  63         NVIDIA_FORCE_HPET_RESUME,
  64         ATI_FORCE_HPET_RESUME,
  65 } force_hpet_resume_type;
  66
  67 static void __iomem *rcba_base;
  68
  69 static void ich_force_hpet_resume(void)
  70 {
  71         u32 val;
  72
  73         if (!force_hpet_address)
  74                 return;
  75
  76         BUG_ON(rcba_base == NULL);
  77
  78         /* read the Function Disable register, dword mode only */
  79         val = readl(rcba_base + 0x3404);
  80         if (!(val & 0x80)) {
  81                 /* HPET disabled in HPTC. Trying to enable */
  82                 writel(val | 0x80, rcba_base + 0x3404);
  83         }
  84
  85         val = readl(rcba_base + 0x3404);
  86         if (!(val & 0x80))
  87                 BUG();
  88         else
  89                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
  90
  91         return;
  92 }
  93
  94 static void ich_force_enable_hpet(struct pci_dev *dev)
  95 {
  96         u32 val;
  97         u32 uninitialized_var(rcba);
  98         int err = 0;
  99
 100         if (hpet_address || force_hpet_address)
 101                 return;
 102
 103         pci_read_config_dword(dev, 0xF0, &rcba);
 104         rcba &= 0xFFFFC000;
 105         if (rcba == 0) {
 106                 dev_printk(KERN_DEBUG, &dev->dev, "RCBA disabled; "
 107                         "cannot force enable HPET\n");
 108                 return;
 109         }
 110
 111         /* use bits 31:14, 16 kB aligned */
 112         rcba_base = ioremap_nocache(rcba, 0x4000);
 113         if (rcba_base == NULL) {
 114                 dev_printk(KERN_DEBUG, &dev->dev, "ioremap failed; "
 115                         "cannot force enable HPET\n");
 116                 return;
 117         }
 118
 119         /* read the Function Disable register, dword mode only */
 120         val = readl(rcba_base + 0x3404);
 121
 122         if (val & 0x80) {
 123                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 124                 val = val & 0x3;
 125                 force_hpet_address = 0xFED00000 | (val << 12);
 126                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 127                         "0x%lx\n", force_hpet_address);
 128                 iounmap(rcba_base);
 129                 return;
 130         }
 131
 132         /* HPET disabled in HPTC. Trying to enable */
 133         writel(val | 0x80, rcba_base + 0x3404);
 134
 135         val = readl(rcba_base + 0x3404);
 136         if (!(val & 0x80)) {
 137                 err = 1;
 138         } else {
 139                 val = val & 0x3;
 140                 force_hpet_address = 0xFED00000 | (val << 12);
 141         }
 142
 143         if (err) {
 144                 force_hpet_address = 0;
 145                 iounmap(rcba_base);
 146                 dev_printk(KERN_DEBUG, &dev->dev,
 147                         "Failed to force enable HPET\n");
 148         } else {
 149                 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
 150                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 151                         "0x%lx\n", force_hpet_address);
 152         }
 153 }
 154
 155 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
 156                          ich_force_enable_hpet);
 157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
 158                          ich_force_enable_hpet);
 159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
 160                          ich_force_enable_hpet);
 161 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
 162                          ich_force_enable_hpet);
 163 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
 164                          ich_force_enable_hpet);
 165 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
 166                          ich_force_enable_hpet);
 167 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
 168                          ich_force_enable_hpet);
 169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4,
 170                          ich_force_enable_hpet);
 171 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
 172                          ich_force_enable_hpet);
 173 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x3a16,   /* ICH10 */
 174                          ich_force_enable_hpet);
 175
 176 static struct pci_dev *cached_dev;
 177
 178 static void hpet_print_force_info(void)
 179 {
 180         printk(KERN_INFO "HPET not enabled in BIOS. "
 181                "You might try hpet=force boot option\n");
 182 }
 183
 184 static void old_ich_force_hpet_resume(void)
 185 {
 186         u32 val;
 187         u32 uninitialized_var(gen_cntl);
 188
 189         if (!force_hpet_address || !cached_dev)
 190                 return;
 191
 192         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 193         gen_cntl &= (~(0x7 << 15));
 194         gen_cntl |= (0x4 << 15);
 195
 196         pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
 197         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 198         val = gen_cntl >> 15;
 199         val &= 0x7;
 200         if (val == 0x4)
 201                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 202         else
 203                 BUG();
 204 }
 205
 206 static void old_ich_force_enable_hpet(struct pci_dev *dev)
 207 {
 208         u32 val;
 209         u32 uninitialized_var(gen_cntl);
 210
 211         if (hpet_address || force_hpet_address)
 212                 return;
 213
 214         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 215         /*
 216          * Bit 17 is HPET enable bit.
 217          * Bit 16:15 control the HPET base address.
 218          */
 219         val = gen_cntl >> 15;
 220         val &= 0x7;
 221         if (val & 0x4) {
 222                 val &= 0x3;
 223                 force_hpet_address = 0xFED00000 | (val << 12);
 224                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 225                         force_hpet_address);
 226                 return;
 227         }
 228
 229         /*
 230          * HPET is disabled. Trying enabling at FED00000 and check
 231          * whether it sticks
 232          */
 233         gen_cntl &= (~(0x7 << 15));
 234         gen_cntl |= (0x4 << 15);
 235         pci_write_config_dword(dev, 0xD0, gen_cntl);
 236
 237         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 238
 239         val = gen_cntl >> 15;
 240         val &= 0x7;
 241         if (val & 0x4) {
 242                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 243                 val &= 0x3;
 244                 force_hpet_address = 0xFED00000 | (val << 12);
 245                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 246                         "0x%lx\n", force_hpet_address);
 247                 cached_dev = dev;
 248                 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
 249                 return;
 250         }
 251
 252         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 253 }
 254
 255 /*
 256  * Undocumented chipset features. Make sure that the user enforced
 257  * this.
 258  */
 259 static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
 260 {
 261         if (hpet_force_user)
 262                 old_ich_force_enable_hpet(dev);
 263 }
 264
 265 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
 266                          old_ich_force_enable_hpet_user);
 267 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
 268                          old_ich_force_enable_hpet_user);
 269 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
 270                          old_ich_force_enable_hpet_user);
 271 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
 272                          old_ich_force_enable_hpet_user);
 273 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
 274                          old_ich_force_enable_hpet_user);
 275 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
 276                          old_ich_force_enable_hpet);
 277 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
 278                          old_ich_force_enable_hpet);
 279
 280
 281 static void vt8237_force_hpet_resume(void)
 282 {
 283         u32 val;
 284
 285         if (!force_hpet_address || !cached_dev)
 286                 return;
 287
 288         val = 0xfed00000 | 0x80;
 289         pci_write_config_dword(cached_dev, 0x68, val);
 290
 291         pci_read_config_dword(cached_dev, 0x68, &val);
 292         if (val & 0x80)
 293                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 294         else
 295                 BUG();
 296 }
 297
 298 static void vt8237_force_enable_hpet(struct pci_dev *dev)
 299 {
 300         u32 uninitialized_var(val);
 301
 302         if (hpet_address || force_hpet_address)
 303                 return;
 304
 305         if (!hpet_force_user) {
 306                 hpet_print_force_info();
 307                 return;
 308         }
 309
 310         pci_read_config_dword(dev, 0x68, &val);
 311         /*
 312          * Bit 7 is HPET enable bit.
 313          * Bit 31:10 is HPET base address (contrary to what datasheet claims)
 314          */
 315         if (val & 0x80) {
 316                 force_hpet_address = (val & ~0x3ff);
 317                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 318                         force_hpet_address);
 319                 return;
 320         }
 321
 322         /*
 323          * HPET is disabled. Trying enabling at FED00000 and check
 324          * whether it sticks
 325          */
 326         val = 0xfed00000 | 0x80;
 327         pci_write_config_dword(dev, 0x68, val);
 328
 329         pci_read_config_dword(dev, 0x68, &val);
 330         if (val & 0x80) {
 331                 force_hpet_address = (val & ~0x3ff);
 332                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 333                         "0x%lx\n", force_hpet_address);
 334                 cached_dev = dev;
 335                 force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
 336                 return;
 337         }
 338
 339         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 340 }
 341
 342 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
 343                          vt8237_force_enable_hpet);
 344 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 345                          vt8237_force_enable_hpet);
 346 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700,
 347                          vt8237_force_enable_hpet);
 348
 349 static void ati_force_hpet_resume(void)
 350 {
 351         pci_write_config_dword(cached_dev, 0x14, 0xfed00000);
 352         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 353 }
 354
 355 static u32 ati_ixp4x0_rev(struct pci_dev *dev)
 356 {
 357         int err = 0;
 358         u32 d = 0;
 359         u8  b = 0;
 360
 361         err = pci_read_config_byte(dev, 0xac, &b);
 362         b &= ~(1<<5);
 363         err |= pci_write_config_byte(dev, 0xac, b);
 364         err |= pci_read_config_dword(dev, 0x70, &d);
 365         d |= 1<<8;
 366         err |= pci_write_config_dword(dev, 0x70, d);
 367         err |= pci_read_config_dword(dev, 0x8, &d);
 368         d &= 0xff;
 369         dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
 370
 371         WARN_ON_ONCE(err);
 372
 373         return d;
 374 }
 375
 376 static void ati_force_enable_hpet(struct pci_dev *dev)
 377 {
 378         u32 d, val;
 379         u8  b;
 380
 381         if (hpet_address || force_hpet_address)
 382                 return;
 383
 384         if (!hpet_force_user) {
 385                 hpet_print_force_info();
 386                 return;
 387         }
 388
 389         d = ati_ixp4x0_rev(dev);
 390         if (d  < 0x82)
 391                 return;
 392
 393         /* base address */
 394         pci_write_config_dword(dev, 0x14, 0xfed00000);
 395         pci_read_config_dword(dev, 0x14, &val);
 396
 397         /* enable interrupt */
 398         outb(0x72, 0xcd6); b = inb(0xcd7);
 399         b |= 0x1;
 400         outb(0x72, 0xcd6); outb(b, 0xcd7);
 401         outb(0x72, 0xcd6); b = inb(0xcd7);
 402         if (!(b & 0x1))
 403                 return;
 404         pci_read_config_dword(dev, 0x64, &d);
 405         d |= (1<<10);
 406         pci_write_config_dword(dev, 0x64, d);
 407         pci_read_config_dword(dev, 0x64, &d);
 408         if (!(d & (1<<10)))
 409                 return;
 410
 411         force_hpet_address = val;
 412         force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
 413         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 414                    force_hpet_address);
 415         cached_dev = dev;
 416 }
 417 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
 418                          ati_force_enable_hpet);
 419
 420 /*
 421  * Undocumented chipset feature taken from LinuxBIOS.
 422  */
 423 static void nvidia_force_hpet_resume(void)
 424 {
 425         pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
 426         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 427 }
 428
 429 static void nvidia_force_enable_hpet(struct pci_dev *dev)
 430 {
 431         u32 uninitialized_var(val);
 432
 433         if (hpet_address || force_hpet_address)
 434                 return;
 435
 436         if (!hpet_force_user) {
 437                 hpet_print_force_info();
 438                 return;
 439         }
 440
 441         pci_write_config_dword(dev, 0x44, 0xfed00001);
 442         pci_read_config_dword(dev, 0x44, &val);
 443         force_hpet_address = val & 0xfffffffe;
 444         force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
 445         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 446                 force_hpet_address);
 447         cached_dev = dev;
 448         return;
 449 }
 450
 451 /* ISA Bridges */
 452 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
 453                         nvidia_force_enable_hpet);
 454 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
 455                         nvidia_force_enable_hpet);
 456
 457 /* LPC bridges */
 458 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0260,
 459                         nvidia_force_enable_hpet);
 460 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
 461                         nvidia_force_enable_hpet);
 462 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
 463                         nvidia_force_enable_hpet);
 464 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
 465                         nvidia_force_enable_hpet);
 466 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
 467                         nvidia_force_enable_hpet);
 468 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
 469                         nvidia_force_enable_hpet);
 470 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
 471                         nvidia_force_enable_hpet);
 472 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
 473                         nvidia_force_enable_hpet);
 474 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
 475                         nvidia_force_enable_hpet);
 476
 477 void force_hpet_resume(void)
 478 {
 479         switch (force_hpet_resume_type) {
 480         case ICH_FORCE_HPET_RESUME:
 481                 ich_force_hpet_resume();
 482                 return;
 483         case OLD_ICH_FORCE_HPET_RESUME:
 484                 old_ich_force_hpet_resume();
 485                 return;
 486         case VT8237_FORCE_HPET_RESUME:
 487                 vt8237_force_hpet_resume();
 488                 return;
 489         case NVIDIA_FORCE_HPET_RESUME:
 490                 nvidia_force_hpet_resume();
 491                 return;
 492         case ATI_FORCE_HPET_RESUME:
 493                 ati_force_hpet_resume();
 494                 return;
 495         default:
 496                 break;
 497         }
 498 }
 499
 500 /*
 501  * HPET MSI on some boards (ATI SB700/SB800) has side effect on
 502  * floppy DMA. Disable HPET MSI on such platforms.
 503  * See erratum #27 (Misinterpreted MSI Requests May Result in
 504  * Corrupted LPC DMA Data) in AMD Publication #46837,
 505  * "SB700 Family Product Errata", Rev. 1.0, March 2010.
 506  */
 507 static void force_disable_hpet_msi(struct pci_dev *unused)
 508 {
 509         hpet_msi_disable = 1;
 510 }
 511
 512 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
 513                          force_disable_hpet_msi);
 514
 515 #endif
 516
 517 #if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
 518 /* Set correct numa_node information for AMD NB functions */
 519 static void quirk_amd_nb_node(struct pci_dev *dev)
 520 {
 521         struct pci_dev *nb_ht;
 522         unsigned int devfn;
 523         u32 node;
 524         u32 val;
 525
 526         devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
 527         nb_ht = pci_get_slot(dev->bus, devfn);
 528         if (!nb_ht)
 529                 return;
 530
 531         pci_read_config_dword(nb_ht, 0x60, &val);
 532         node = val & 7;
 533         /*
 534          * Some hardware may return an invalid node ID,
 535          * so check it first:
 536          */
 537         if (node_online(node))
 538                 set_dev_node(&dev->dev, node);
 539         pci_dev_put(nb_ht);
 540 }
 541
 542 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
 543                         quirk_amd_nb_node);
 544 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
 545                         quirk_amd_nb_node);
 546 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
 547                         quirk_amd_nb_node);
 548 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC,
 549                         quirk_amd_nb_node);
 550 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_HT,
 551                         quirk_amd_nb_node);
 552 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MAP,
 553                         quirk_amd_nb_node);
 554 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_DRAM,
 555                         quirk_amd_nb_node);
 556 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC,
 557                         quirk_amd_nb_node);
 558 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_LINK,
 559                         quirk_amd_nb_node);
 560 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F0,
 561                         quirk_amd_nb_node);
 562 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F1,
 563                         quirk_amd_nb_node);
 564 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F2,
 565                         quirk_amd_nb_node);
 566 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F3,
 567                         quirk_amd_nb_node);
 568 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F4,
 569                         quirk_amd_nb_node);
 570 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F5,
 571                         quirk_amd_nb_node);
 572
 573 #endif
 574
 575 #ifdef CONFIG_PCI
 576 /*
 577  * Processor does not ensure DRAM scrub read/write sequence
 578  * is atomic wrt accesses to CC6 save state area. Therefore
 579  * if a concurrent scrub read/write access is to same address
 580  * the entry may appear as if it is not written. This quirk
 581  * applies to Fam16h models 00h-0Fh
 582  *
 583  * See "Revision Guide" for AMD F16h models 00h-0fh,
 584  * document 51810 rev. 3.04, Nov 2013
 585  */
 586 static void amd_disable_seq_and_redirect_scrub(struct pci_dev *dev)
 587 {
 588         u32 val;
 589
 590         /*
 591          * Suggested workaround:
 592          * set D18F3x58[4:0] = 00h and set D18F3x5C[0] = 0b
 593          */
 594         pci_read_config_dword(dev, 0x58, &val);
 595         if (val & 0x1F) {
 596                 val &= ~(0x1F);
 597                 pci_write_config_dword(dev, 0x58, val);
 598         }
 599
 600         pci_read_config_dword(dev, 0x5C, &val);
 601         if (val & BIT(0)) {
 602                 val &= ~BIT(0);
 603                 pci_write_config_dword(dev, 0x5c, val);
 604         }
 605 }
 606
 607 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F3,
 608                         amd_disable_seq_and_redirect_scrub);
 609
 610 #endif