drivers/edac/e752x_edac.c

   1 /*
   2  * Intel e752x Memory Controller kernel module
   3  * (C) 2004 Linux Networx (http://lnxi.com)
   4  * This file may be distributed under the terms of the
   5  * GNU General Public License.
   6  *
   7  * See "enum e752x_chips" below for supported chipsets
   8  *
   9  * Written by Tom Zimmerman
  10  *
  11  * Contributors:
  12  *      Thayne Harbaugh at realmsys.com (?)
  13  *      Wang Zhenyu at intel.com
  14  *      Dave Jiang at mvista.com
  15  *
  16  * $Id: edac_e752x.c,v 1.5.2.11 2005/10/05 00:43:44 dsp_llnl Exp $
  17  *
  18  */
  19
  20 #include <linux/config.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci_ids.h>
  25 #include <linux/slab.h>
  26 #include "edac_mc.h"
  27
  28 #define e752x_printk(level, fmt, arg...) \
  29         edac_printk(level, "e752x", fmt, ##arg)
  30
  31 #define e752x_mc_printk(mci, level, fmt, arg...) \
  32         edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg)
  33
  34 #ifndef PCI_DEVICE_ID_INTEL_7520_0
  35 #define PCI_DEVICE_ID_INTEL_7520_0      0x3590
  36 #endif                          /* PCI_DEVICE_ID_INTEL_7520_0      */
  37
  38 #ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR
  39 #define PCI_DEVICE_ID_INTEL_7520_1_ERR  0x3591
  40 #endif                          /* PCI_DEVICE_ID_INTEL_7520_1_ERR  */
  41
  42 #ifndef PCI_DEVICE_ID_INTEL_7525_0
  43 #define PCI_DEVICE_ID_INTEL_7525_0      0x359E
  44 #endif                          /* PCI_DEVICE_ID_INTEL_7525_0      */
  45
  46 #ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR
  47 #define PCI_DEVICE_ID_INTEL_7525_1_ERR  0x3593
  48 #endif                          /* PCI_DEVICE_ID_INTEL_7525_1_ERR  */
  49
  50 #ifndef PCI_DEVICE_ID_INTEL_7320_0
  51 #define PCI_DEVICE_ID_INTEL_7320_0      0x3592
  52 #endif                          /* PCI_DEVICE_ID_INTEL_7320_0 */
  53
  54 #ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR
  55 #define PCI_DEVICE_ID_INTEL_7320_1_ERR  0x3593
  56 #endif                          /* PCI_DEVICE_ID_INTEL_7320_1_ERR */
  57
  58 #define E752X_NR_CSROWS         8       /* number of csrows */
  59
  60 /* E752X register addresses - device 0 function 0 */
  61 #define E752X_DRB               0x60    /* DRAM row boundary register (8b) */
  62 #define E752X_DRA               0x70    /* DRAM row attribute register (8b) */
  63                                         /*
  64                                          * 31:30   Device width row 7
  65                                          *      01=x8 10=x4 11=x8 DDR2
  66                                          * 27:26   Device width row 6
  67                                          * 23:22   Device width row 5
  68                                          * 19:20   Device width row 4
  69                                          * 15:14   Device width row 3
  70                                          * 11:10   Device width row 2
  71                                          *  7:6    Device width row 1
  72                                          *  3:2    Device width row 0
  73                                          */
  74 #define E752X_DRC               0x7C    /* DRAM controller mode reg (32b) */
  75                                         /* FIXME:IS THIS RIGHT? */
  76                                         /*
  77                                          * 22    Number channels 0=1,1=2
  78                                          * 19:18 DRB Granularity 32/64MB
  79                                          */
  80 #define E752X_DRM               0x80    /* Dimm mapping register */
  81 #define E752X_DDRCSR            0x9A    /* DDR control and status reg (16b) */
  82                                         /*
  83                                          * 14:12 1 single A, 2 single B, 3 dual
  84                                          */
  85 #define E752X_TOLM              0xC4    /* DRAM top of low memory reg (16b) */
  86 #define E752X_REMAPBASE         0xC6    /* DRAM remap base address reg (16b) */
  87 #define E752X_REMAPLIMIT        0xC8    /* DRAM remap limit address reg (16b) */
  88 #define E752X_REMAPOFFSET       0xCA    /* DRAM remap limit offset reg (16b) */
  89
  90 /* E752X register addresses - device 0 function 1 */
  91 #define E752X_FERR_GLOBAL       0x40    /* Global first error register (32b) */
  92 #define E752X_NERR_GLOBAL       0x44    /* Global next error register (32b) */
  93 #define E752X_HI_FERR           0x50    /* Hub interface first error reg (8b) */
  94 #define E752X_HI_NERR           0x52    /* Hub interface next error reg (8b) */
  95 #define E752X_HI_ERRMASK        0x54    /* Hub interface error mask reg (8b) */
  96 #define E752X_HI_SMICMD         0x5A    /* Hub interface SMI command reg (8b) */
  97 #define E752X_SYSBUS_FERR       0x60    /* System buss first error reg (16b) */
  98 #define E752X_SYSBUS_NERR       0x62    /* System buss next error reg (16b) */
  99 #define E752X_SYSBUS_ERRMASK    0x64    /* System buss error mask reg (16b) */
 100 #define E752X_SYSBUS_SMICMD     0x6A    /* System buss SMI command reg (16b) */
 101 #define E752X_BUF_FERR          0x70    /* Memory buffer first error reg (8b) */
 102 #define E752X_BUF_NERR          0x72    /* Memory buffer next error reg (8b) */
 103 #define E752X_BUF_ERRMASK       0x74    /* Memory buffer error mask reg (8b) */
 104 #define E752X_BUF_SMICMD        0x7A    /* Memory buffer SMI command reg (8b) */
 105 #define E752X_DRAM_FERR         0x80    /* DRAM first error register (16b) */
 106 #define E752X_DRAM_NERR         0x82    /* DRAM next error register (16b) */
 107 #define E752X_DRAM_ERRMASK      0x84    /* DRAM error mask register (8b) */
 108 #define E752X_DRAM_SMICMD       0x8A    /* DRAM SMI command register (8b) */
 109 #define E752X_DRAM_RETR_ADD     0xAC    /* DRAM Retry address register (32b) */
 110 #define E752X_DRAM_SEC1_ADD     0xA0    /* DRAM first correctable memory */
 111                                         /*     error address register (32b) */
 112                                         /*
 113                                          * 31    Reserved
 114                                          * 30:2  CE address (64 byte block 34:6)
 115                                          * 1     Reserved
 116                                          * 0     HiLoCS
 117                                          */
 118 #define E752X_DRAM_SEC2_ADD     0xC8    /* DRAM first correctable memory */
 119                                         /*     error address register (32b) */
 120                                         /*
 121                                          * 31    Reserved
 122                                          * 30:2  CE address (64 byte block 34:6)
 123                                          * 1     Reserved
 124                                          * 0     HiLoCS
 125                                          */
 126 #define E752X_DRAM_DED_ADD      0xA4    /* DRAM first uncorrectable memory */
 127                                         /*     error address register (32b) */
 128                                         /*
 129                                          * 31    Reserved
 130                                          * 30:2  CE address (64 byte block 34:6)
 131                                          * 1     Reserved
 132                                          * 0     HiLoCS
 133                                          */
 134 #define E752X_DRAM_SCRB_ADD     0xA8    /* DRAM first uncorrectable scrub memory */
 135                                         /*     error address register (32b) */
 136                                         /*
 137                                          * 31    Reserved
 138                                          * 30:2  CE address (64 byte block 34:6)
 139                                          * 1     Reserved
 140                                          * 0     HiLoCS
 141                                          */
 142 #define E752X_DRAM_SEC1_SYNDROME 0xC4   /* DRAM first correctable memory */
 143                                         /*     error syndrome register (16b) */
 144 #define E752X_DRAM_SEC2_SYNDROME 0xC6   /* DRAM second correctable memory */
 145                                         /*     error syndrome register (16b) */
 146 #define E752X_DEVPRES1          0xF4    /* Device Present 1 register (8b) */
 147
 148 /* ICH5R register addresses - device 30 function 0 */
 149 #define ICH5R_PCI_STAT          0x06    /* PCI status register (16b) */
 150 #define ICH5R_PCI_2ND_STAT      0x1E    /* PCI status secondary reg (16b) */
 151 #define ICH5R_PCI_BRIDGE_CTL    0x3E    /* PCI bridge control register (16b) */
 152
 153 enum e752x_chips {
 154         E7520 = 0,
 155         E7525 = 1,
 156         E7320 = 2
 157 };
 158
 159 struct e752x_pvt {
 160         struct pci_dev *bridge_ck;
 161         struct pci_dev *dev_d0f0;
 162         struct pci_dev *dev_d0f1;
 163         u32 tolm;
 164         u32 remapbase;
 165         u32 remaplimit;
 166         int mc_symmetric;
 167         u8 map[8];
 168         int map_type;
 169         const struct e752x_dev_info *dev_info;
 170 };
 171
 172 struct e752x_dev_info {
 173         u16 err_dev;
 174         u16 ctl_dev;
 175         const char *ctl_name;
 176 };
 177
 178 struct e752x_error_info {
 179         u32 ferr_global;
 180         u32 nerr_global;
 181         u8 hi_ferr;
 182         u8 hi_nerr;
 183         u16 sysbus_ferr;
 184         u16 sysbus_nerr;
 185         u8 buf_ferr;
 186         u8 buf_nerr;
 187         u16 dram_ferr;
 188         u16 dram_nerr;
 189         u32 dram_sec1_add;
 190         u32 dram_sec2_add;
 191         u16 dram_sec1_syndrome;
 192         u16 dram_sec2_syndrome;
 193         u32 dram_ded_add;
 194         u32 dram_scrb_add;
 195         u32 dram_retr_add;
 196 };
 197
 198 static const struct e752x_dev_info e752x_devs[] = {
 199         [E7520] = {
 200                 .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR,
 201                 .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0,
 202                 .ctl_name = "E7520"
 203         },
 204         [E7525] = {
 205                 .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
 206                 .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0,
 207                 .ctl_name = "E7525"
 208         },
 209         [E7320] = {
 210                 .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
 211                 .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0,
 212                 .ctl_name = "E7320"
 213         },
 214 };
 215
 216 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
 217                 unsigned long page)
 218 {
 219         u32 remap;
 220         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 221
 222         debugf3("%s()\n", __func__);
 223
 224         if (page < pvt->tolm)
 225                 return page;
 226
 227         if ((page >= 0x100000) && (page < pvt->remapbase))
 228                 return page;
 229
 230         remap = (page - pvt->tolm) + pvt->remapbase;
 231
 232         if (remap < pvt->remaplimit)
 233                 return remap;
 234
 235         e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
 236         return pvt->tolm - 1;
 237 }
 238
 239 static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
 240                 u32 sec1_add, u16 sec1_syndrome)
 241 {
 242         u32 page;
 243         int row;
 244         int channel;
 245         int i;
 246         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 247
 248         debugf3("%s()\n", __func__);
 249
 250         /* convert the addr to 4k page */
 251         page = sec1_add >> (PAGE_SHIFT - 4);
 252
 253         /* FIXME - check for -1 */
 254         if (pvt->mc_symmetric) {
 255                 /* chip select are bits 14 & 13 */
 256                 row = ((page >> 1) & 3);
 257                 e752x_printk(KERN_WARNING,
 258                         "Test row %d Table %d %d %d %d %d %d %d %d\n", row,
 259                         pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3],
 260                         pvt->map[4], pvt->map[5], pvt->map[6], pvt->map[7]);
 261
 262                 /* test for channel remapping */
 263                 for (i = 0; i < 8; i++) {
 264                         if (pvt->map[i] == row)
 265                                 break;
 266                 }
 267
 268                 e752x_printk(KERN_WARNING, "Test computed row %d\n", i);
 269
 270                 if (i < 8)
 271                         row = i;
 272                 else
 273                         e752x_mc_printk(mci, KERN_WARNING,
 274                                 "row %d not found in remap table\n", row);
 275         } else
 276                 row = edac_mc_find_csrow_by_page(mci, page);
 277
 278         /* 0 = channel A, 1 = channel B */
 279         channel = !(error_one & 1);
 280
 281         if (!pvt->map_type)
 282                 row = 7 - row;
 283
 284         edac_mc_handle_ce(mci, page, 0, sec1_syndrome, row, channel,
 285                 "e752x CE");
 286 }
 287
 288 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
 289                 u32 sec1_add, u16 sec1_syndrome, int *error_found,
 290                 int handle_error)
 291 {
 292         *error_found = 1;
 293
 294         if (handle_error)
 295                 do_process_ce(mci, error_one, sec1_add, sec1_syndrome);
 296 }
 297
 298 static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
 299                 u32 ded_add, u32 scrb_add)
 300 {
 301         u32 error_2b, block_page;
 302         int row;
 303         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 304
 305         debugf3("%s()\n", __func__);
 306
 307         if (error_one & 0x0202) {
 308                 error_2b = ded_add;
 309
 310                 /* convert to 4k address */
 311                 block_page = error_2b >> (PAGE_SHIFT - 4);
 312
 313                 row = pvt->mc_symmetric ?
 314                         /* chip select are bits 14 & 13 */
 315                         ((block_page >> 1) & 3) :
 316                         edac_mc_find_csrow_by_page(mci, block_page);
 317
 318                 edac_mc_handle_ue(mci, block_page, 0, row,
 319                         "e752x UE from Read");
 320         }
 321         if (error_one & 0x0404) {
 322                 error_2b = scrb_add;
 323
 324                 /* convert to 4k address */
 325                 block_page = error_2b >> (PAGE_SHIFT - 4);
 326
 327                 row = pvt->mc_symmetric ?
 328                         /* chip select are bits 14 & 13 */
 329                         ((block_page >> 1) & 3) :
 330                         edac_mc_find_csrow_by_page(mci, block_page);
 331
 332                 edac_mc_handle_ue(mci, block_page, 0, row,
 333                                 "e752x UE from Scruber");
 334         }
 335 }
 336
 337 static inline void process_ue(struct mem_ctl_info *mci, u16 error_one,
 338                 u32 ded_add, u32 scrb_add, int *error_found, int handle_error)
 339 {
 340         *error_found = 1;
 341
 342         if (handle_error)
 343                 do_process_ue(mci, error_one, ded_add, scrb_add);
 344 }
 345
 346 static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
 347                 int *error_found, int handle_error)
 348 {
 349         *error_found = 1;
 350
 351         if (!handle_error)
 352                 return;
 353
 354         debugf3("%s()\n", __func__);
 355         edac_mc_handle_ue_no_info(mci, "e752x UE log memory write");
 356 }
 357
 358 static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
 359                 u32 retry_add)
 360 {
 361         u32 error_1b, page;
 362         int row;
 363         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 364
 365         error_1b = retry_add;
 366         page = error_1b >> (PAGE_SHIFT - 4); /* convert the addr to 4k page */
 367         row = pvt->mc_symmetric ?
 368                 ((page >> 1) & 3) : /* chip select are bits 14 & 13 */
 369                 edac_mc_find_csrow_by_page(mci, page);
 370         e752x_mc_printk(mci, KERN_WARNING,
 371                 "CE page 0x%lx, row %d : Memory read retry\n",
 372                 (long unsigned int) page, row);
 373 }
 374
 375 static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error,
 376                 u32 retry_add, int *error_found, int handle_error)
 377 {
 378         *error_found = 1;
 379
 380         if (handle_error)
 381                 do_process_ded_retry(mci, error, retry_add);
 382 }
 383
 384 static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error,
 385                 int *error_found, int handle_error)
 386 {
 387         *error_found = 1;
 388
 389         if (handle_error)
 390                 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n");
 391 }
 392
 393 static char *global_message[11] = {
 394         "PCI Express C1", "PCI Express C", "PCI Express B1",
 395         "PCI Express B", "PCI Express A1", "PCI Express A",
 396         "DMA Controler", "HUB Interface", "System Bus",
 397         "DRAM Controler", "Internal Buffer"
 398 };
 399
 400 static char *fatal_message[2] = { "Non-Fatal ", "Fatal " };
 401
 402 static void do_global_error(int fatal, u32 errors)
 403 {
 404         int i;
 405
 406         for (i = 0; i < 11; i++) {
 407                 if (errors & (1 << i))
 408                         e752x_printk(KERN_WARNING, "%sError %s\n",
 409                                 fatal_message[fatal], global_message[i]);
 410         }
 411 }
 412
 413 static inline void global_error(int fatal, u32 errors, int *error_found,
 414                 int handle_error)
 415 {
 416         *error_found = 1;
 417
 418         if (handle_error)
 419                 do_global_error(fatal, errors);
 420 }
 421
 422 static char *hub_message[7] = {
 423         "HI Address or Command Parity", "HI Illegal Access",
 424         "HI Internal Parity", "Out of Range Access",
 425         "HI Data Parity", "Enhanced Config Access",
 426         "Hub Interface Target Abort"
 427 };
 428
 429 static void do_hub_error(int fatal, u8 errors)
 430 {
 431         int i;
 432
 433         for (i = 0; i < 7; i++) {
 434                 if (errors & (1 << i))
 435                         e752x_printk(KERN_WARNING, "%sError %s\n",
 436                                 fatal_message[fatal], hub_message[i]);
 437         }
 438 }
 439
 440 static inline void hub_error(int fatal, u8 errors, int *error_found,
 441                 int handle_error)
 442 {
 443         *error_found = 1;
 444
 445         if (handle_error)
 446                 do_hub_error(fatal, errors);
 447 }
 448
 449 static char *membuf_message[4] = {
 450         "Internal PMWB to DRAM parity",
 451         "Internal PMWB to System Bus Parity",
 452         "Internal System Bus or IO to PMWB Parity",
 453         "Internal DRAM to PMWB Parity"
 454 };
 455
 456 static void do_membuf_error(u8 errors)
 457 {
 458         int i;
 459
 460         for (i = 0; i < 4; i++) {
 461                 if (errors & (1 << i))
 462                         e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n",
 463                                 membuf_message[i]);
 464         }
 465 }
 466
 467 static inline void membuf_error(u8 errors, int *error_found, int handle_error)
 468 {
 469         *error_found = 1;
 470
 471         if (handle_error)
 472                 do_membuf_error(errors);
 473 }
 474
 475 #if 0
 476 char *sysbus_message[10] = {
 477         "Addr or Request Parity",
 478         "Data Strobe Glitch",
 479         "Addr Strobe Glitch",
 480         "Data Parity",
 481         "Addr Above TOM",
 482         "Non DRAM Lock Error",
 483         "MCERR", "BINIT",
 484         "Memory Parity",
 485         "IO Subsystem Parity"
 486 };
 487 #endif  /*  0  */
 488
 489 static void do_sysbus_error(int fatal, u32 errors)
 490 {
 491         int i;
 492
 493         for (i = 0; i < 10; i++) {
 494                 if (errors & (1 << i))
 495                         e752x_printk(KERN_WARNING, "%sError System Bus %s\n",
 496                                 fatal_message[fatal], global_message[i]);
 497         }
 498 }
 499
 500 static inline void sysbus_error(int fatal, u32 errors, int *error_found,
 501                 int handle_error)
 502 {
 503         *error_found = 1;
 504
 505         if (handle_error)
 506                 do_sysbus_error(fatal, errors);
 507 }
 508
 509 static void e752x_check_hub_interface(struct e752x_error_info *info,
 510                 int *error_found, int handle_error)
 511 {
 512         u8 stat8;
 513
 514         //pci_read_config_byte(dev,E752X_HI_FERR,&stat8);
 515
 516         stat8 = info->hi_ferr;
 517
 518         if(stat8 & 0x7f) { /* Error, so process */
 519                 stat8 &= 0x7f;
 520
 521                 if(stat8 & 0x2b)
 522                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 523
 524                 if(stat8 & 0x54)
 525                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 526         }
 527
 528         //pci_read_config_byte(dev,E752X_HI_NERR,&stat8);
 529
 530         stat8 = info->hi_nerr;
 531
 532         if(stat8 & 0x7f) { /* Error, so process */
 533                 stat8 &= 0x7f;
 534
 535                 if (stat8 & 0x2b)
 536                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 537
 538                 if(stat8 & 0x54)
 539                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 540         }
 541 }
 542
 543 static void e752x_check_sysbus(struct e752x_error_info *info,
 544                 int *error_found, int handle_error)
 545 {
 546         u32 stat32, error32;
 547
 548         //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32);
 549         stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16);
 550
 551         if (stat32 == 0)
 552                 return;  /* no errors */
 553
 554         error32 = (stat32 >> 16) & 0x3ff;
 555         stat32 = stat32 & 0x3ff;
 556
 557         if(stat32 & 0x083)
 558                 sysbus_error(1, stat32 & 0x083, error_found, handle_error);
 559
 560         if(stat32 & 0x37c)
 561                 sysbus_error(0, stat32 & 0x37c, error_found, handle_error);
 562
 563         if(error32 & 0x083)
 564                 sysbus_error(1, error32 & 0x083, error_found, handle_error);
 565
 566         if(error32 & 0x37c)
 567                 sysbus_error(0, error32 & 0x37c, error_found, handle_error);
 568 }
 569
 570 static void e752x_check_membuf (struct e752x_error_info *info,
 571                 int *error_found, int handle_error)
 572 {
 573         u8 stat8;
 574
 575         stat8 = info->buf_ferr;
 576
 577         if (stat8 & 0x0f) { /* Error, so process */
 578                 stat8 &= 0x0f;
 579                 membuf_error(stat8, error_found, handle_error);
 580         }
 581
 582         stat8 = info->buf_nerr;
 583
 584         if (stat8 & 0x0f) { /* Error, so process */
 585                 stat8 &= 0x0f;
 586                 membuf_error(stat8, error_found, handle_error);
 587         }
 588 }
 589
 590 static void e752x_check_dram (struct mem_ctl_info *mci,
 591                 struct e752x_error_info *info, int *error_found,
 592                 int handle_error)
 593 {
 594         u16 error_one, error_next;
 595
 596         error_one = info->dram_ferr;
 597         error_next = info->dram_nerr;
 598
 599         /* decode and report errors */
 600         if(error_one & 0x0101)  /* check first error correctable */
 601                 process_ce(mci, error_one, info->dram_sec1_add,
 602                            info->dram_sec1_syndrome, error_found,
 603                            handle_error);
 604
 605         if(error_next & 0x0101)  /* check next error correctable */
 606                 process_ce(mci, error_next, info->dram_sec2_add,
 607                            info->dram_sec2_syndrome, error_found,
 608                            handle_error);
 609
 610         if(error_one & 0x4040)
 611                 process_ue_no_info_wr(mci, error_found, handle_error);
 612
 613         if(error_next & 0x4040)
 614                 process_ue_no_info_wr(mci, error_found, handle_error);
 615
 616         if(error_one & 0x2020)
 617                 process_ded_retry(mci, error_one, info->dram_retr_add,
 618                                   error_found, handle_error);
 619
 620         if(error_next & 0x2020)
 621                 process_ded_retry(mci, error_next, info->dram_retr_add,
 622                                   error_found, handle_error);
 623
 624         if(error_one & 0x0808)
 625                 process_threshold_ce(mci, error_one, error_found,
 626                                      handle_error);
 627
 628         if(error_next & 0x0808)
 629                 process_threshold_ce(mci, error_next, error_found,
 630                                      handle_error);
 631
 632         if(error_one & 0x0606)
 633                 process_ue(mci, error_one, info->dram_ded_add,
 634                            info->dram_scrb_add, error_found, handle_error);
 635
 636         if(error_next & 0x0606)
 637                 process_ue(mci, error_next, info->dram_ded_add,
 638                            info->dram_scrb_add, error_found, handle_error);
 639 }
 640
 641 static void e752x_get_error_info (struct mem_ctl_info *mci,
 642                 struct e752x_error_info *info)
 643 {
 644         struct pci_dev *dev;
 645         struct e752x_pvt *pvt;
 646
 647         memset(info, 0, sizeof(*info));
 648         pvt = (struct e752x_pvt *) mci->pvt_info;
 649         dev = pvt->dev_d0f1;
 650         pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global);
 651
 652         if (info->ferr_global) {
 653                 pci_read_config_byte(dev, E752X_HI_FERR, &info->hi_ferr);
 654                 pci_read_config_word(dev, E752X_SYSBUS_FERR,
 655                                 &info->sysbus_ferr);
 656                 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr);
 657                 pci_read_config_word(dev, E752X_DRAM_FERR,
 658                                 &info->dram_ferr);
 659                 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD,
 660                                 &info->dram_sec1_add);
 661                 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME,
 662                                 &info->dram_sec1_syndrome);
 663                 pci_read_config_dword(dev, E752X_DRAM_DED_ADD,
 664                                 &info->dram_ded_add);
 665                 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD,
 666                                 &info->dram_scrb_add);
 667                 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD,
 668                                 &info->dram_retr_add);
 669
 670                 if (info->hi_ferr & 0x7f)
 671                         pci_write_config_byte(dev, E752X_HI_FERR,
 672                                         info->hi_ferr);
 673
 674                 if (info->sysbus_ferr)
 675                         pci_write_config_word(dev, E752X_SYSBUS_FERR,
 676                                         info->sysbus_ferr);
 677
 678                 if (info->buf_ferr & 0x0f)
 679                         pci_write_config_byte(dev, E752X_BUF_FERR,
 680                                         info->buf_ferr);
 681
 682                 if (info->dram_ferr)
 683                         pci_write_bits16(pvt->bridge_ck, E752X_DRAM_FERR,
 684                                         info->dram_ferr, info->dram_ferr);
 685
 686                 pci_write_config_dword(dev, E752X_FERR_GLOBAL,
 687                                 info->ferr_global);
 688         }
 689
 690         pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global);
 691
 692         if (info->nerr_global) {
 693                 pci_read_config_byte(dev, E752X_HI_NERR, &info->hi_nerr);
 694                 pci_read_config_word(dev, E752X_SYSBUS_NERR,
 695                                 &info->sysbus_nerr);
 696                 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr);
 697                 pci_read_config_word(dev, E752X_DRAM_NERR,
 698                                 &info->dram_nerr);
 699                 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD,
 700                                 &info->dram_sec2_add);
 701                 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME,
 702                                 &info->dram_sec2_syndrome);
 703
 704                 if (info->hi_nerr & 0x7f)
 705                         pci_write_config_byte(dev, E752X_HI_NERR,
 706                                         info->hi_nerr);
 707
 708                 if (info->sysbus_nerr)
 709                         pci_write_config_word(dev, E752X_SYSBUS_NERR,
 710                                         info->sysbus_nerr);
 711
 712                 if (info->buf_nerr & 0x0f)
 713                         pci_write_config_byte(dev, E752X_BUF_NERR,
 714                                         info->buf_nerr);
 715
 716                 if (info->dram_nerr)
 717                         pci_write_bits16(pvt->bridge_ck, E752X_DRAM_NERR,
 718                                         info->dram_nerr, info->dram_nerr);
 719
 720                 pci_write_config_dword(dev, E752X_NERR_GLOBAL,
 721                                 info->nerr_global);
 722         }
 723 }
 724
 725 static int e752x_process_error_info (struct mem_ctl_info *mci,
 726                 struct e752x_error_info *info, int handle_errors)
 727 {
 728         u32 error32, stat32;
 729         int error_found;
 730
 731         error_found = 0;
 732         error32 = (info->ferr_global >> 18) & 0x3ff;
 733         stat32 = (info->ferr_global >> 4) & 0x7ff;
 734
 735         if (error32)
 736                 global_error(1, error32, &error_found, handle_errors);
 737
 738         if (stat32)
 739                 global_error(0, stat32, &error_found, handle_errors);
 740
 741         error32 = (info->nerr_global >> 18) & 0x3ff;
 742         stat32 = (info->nerr_global >> 4) & 0x7ff;
 743
 744         if (error32)
 745                 global_error(1, error32, &error_found, handle_errors);
 746
 747         if (stat32)
 748                 global_error(0, stat32, &error_found, handle_errors);
 749
 750         e752x_check_hub_interface(info, &error_found, handle_errors);
 751         e752x_check_sysbus(info, &error_found, handle_errors);
 752         e752x_check_membuf(info, &error_found, handle_errors);
 753         e752x_check_dram(mci, info, &error_found, handle_errors);
 754         return error_found;
 755 }
 756
 757 static void e752x_check(struct mem_ctl_info *mci)
 758 {
 759         struct e752x_error_info info;
 760
 761         debugf3("%s()\n", __func__);
 762         e752x_get_error_info(mci, &info);
 763         e752x_process_error_info(mci, &info, 1);
 764 }
 765
 766 static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
 767 {
 768         int rc = -ENODEV;
 769         int index;
 770         u16 pci_data;
 771         u8 stat8;
 772         struct mem_ctl_info *mci = NULL;
 773         struct e752x_pvt *pvt = NULL;
 774         u16 ddrcsr;
 775         u32 drc;
 776         int drc_chan;   /* Number of channels 0=1chan,1=2chan */
 777         int drc_drbg;   /* DRB granularity 0=64mb, 1=128mb */
 778         int drc_ddim;   /* DRAM Data Integrity Mode 0=none,2=edac */
 779         u32 dra;
 780         unsigned long last_cumul_size;
 781         struct pci_dev *dev = NULL;
 782         struct e752x_error_info discard;
 783
 784         debugf0("%s(): mci\n", __func__);
 785         debugf0("Starting Probe1\n");
 786
 787         /* enable device 0 function 1 */
 788         pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
 789         stat8 |= (1 << 5);
 790         pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
 791
 792         /* need to find out the number of channels */
 793         pci_read_config_dword(pdev, E752X_DRC, &drc);
 794         pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr);
 795         /* FIXME: should check >>12 or 0xf, true for all? */
 796         /* Dual channel = 1, Single channel = 0 */
 797         drc_chan = (((ddrcsr >> 12) & 3) == 3);
 798         drc_drbg = drc_chan + 1;        /* 128 in dual mode, 64 in single */
 799         drc_ddim = (drc >> 20) & 0x3;
 800
 801         mci = edac_mc_alloc(sizeof(*pvt), E752X_NR_CSROWS, drc_chan + 1);
 802
 803         if (mci == NULL) {
 804                 rc = -ENOMEM;
 805                 goto fail;
 806         }
 807
 808         debugf3("%s(): init mci\n", __func__);
 809         mci->mtype_cap = MEM_FLAG_RDDR;
 810         mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED |
 811             EDAC_FLAG_S4ECD4ED;
 812         /* FIXME - what if different memory types are in different csrows? */
 813         mci->mod_name = EDAC_MOD_STR;
 814         mci->mod_ver = "$Revision: 1.5.2.11 $";
 815         mci->pdev = pdev;
 816
 817         debugf3("%s(): init pvt\n", __func__);
 818         pvt = (struct e752x_pvt *) mci->pvt_info;
 819         pvt->dev_info = &e752x_devs[dev_idx];
 820         pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
 821                                         pvt->dev_info->err_dev,
 822                                         pvt->bridge_ck);
 823
 824         if (pvt->bridge_ck == NULL)
 825                 pvt->bridge_ck = pci_scan_single_device(pdev->bus,
 826                                         PCI_DEVFN(0, 1));
 827
 828         if (pvt->bridge_ck == NULL) {
 829                 e752x_printk(KERN_ERR, "error reporting device not found:"
 830                         "vendor %x device 0x%x (broken BIOS?)\n",
 831                         PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
 832                 goto fail;
 833         }
 834
 835         pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
 836         debugf3("%s(): more mci init\n", __func__);
 837         mci->ctl_name = pvt->dev_info->ctl_name;
 838         mci->edac_check = e752x_check;
 839         mci->ctl_page_to_phys = ctl_page_to_phys;
 840
 841         /* find out the device types */
 842         pci_read_config_dword(pdev, E752X_DRA, &dra);
 843
 844         /*
 845          * The dram row boundary (DRB) reg values are boundary address for
 846          * each DRAM row with a granularity of 64 or 128MB (single/dual
 847          * channel operation).  DRB regs are cumulative; therefore DRB7 will
 848          * contain the total memory contained in all eight rows.
 849          */
 850         for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) {
 851                 u8 value;
 852                 u32 cumul_size;
 853
 854                 /* mem_dev 0=x8, 1=x4 */
 855                 int mem_dev = (dra >> (index * 4 + 2)) & 0x3;
 856                 struct csrow_info *csrow = &mci->csrows[index];
 857
 858                 mem_dev = (mem_dev == 2);
 859                 pci_read_config_byte(mci->pdev, E752X_DRB + index, &value);
 860                 /* convert a 128 or 64 MiB DRB to a page size. */
 861                 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
 862                 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
 863                         cumul_size);
 864
 865                 if (cumul_size == last_cumul_size)
 866                         continue; /* not populated */
 867
 868                 csrow->first_page = last_cumul_size;
 869                 csrow->last_page = cumul_size - 1;
 870                 csrow->nr_pages = cumul_size - last_cumul_size;
 871                 last_cumul_size = cumul_size;
 872                 csrow->grain = 1 << 12;  /* 4KiB - resolution of CELOG */
 873                 csrow->mtype = MEM_RDDR;  /* only one type supported */
 874                 csrow->dtype = mem_dev ? DEV_X4 : DEV_X8;
 875
 876                 /*
 877                  * if single channel or x8 devices then SECDED
 878                  * if dual channel and x4 then S4ECD4ED
 879                  */
 880                 if (drc_ddim) {
 881                         if (drc_chan && mem_dev) {
 882                                 csrow->edac_mode = EDAC_S4ECD4ED;
 883                                 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
 884                         } else {
 885                                 csrow->edac_mode = EDAC_SECDED;
 886                                 mci->edac_cap |= EDAC_FLAG_SECDED;
 887                         }
 888                 } else
 889                         csrow->edac_mode = EDAC_NONE;
 890         }
 891
 892         /* Fill in the memory map table */
 893         {
 894                 u8 value;
 895                 u8 last = 0;
 896                 u8 row = 0;
 897
 898                 for (index = 0; index < 8; index += 2) {
 899                         pci_read_config_byte(mci->pdev, E752X_DRB + index,
 900                                         &value);
 901
 902                         /* test if there is a dimm in this slot */
 903                         if (value == last) {
 904                                 /* no dimm in the slot, so flag it as empty */
 905                                 pvt->map[index] = 0xff;
 906                                 pvt->map[index + 1] = 0xff;
 907                         } else { /* there is a dimm in the slot */
 908                                 pvt->map[index] = row;
 909                                 row++;
 910                                 last = value;
 911                                 /* test the next value to see if the dimm is
 912                                    double sided */
 913                                 pci_read_config_byte(mci->pdev,
 914                                                 E752X_DRB + index + 1,
 915                                                 &value);
 916                                 pvt->map[index + 1] = (value == last) ?
 917                                         0xff :  /* the dimm is single sided,
 918                                                  * so flag as empty
 919                                                  */
 920                                         row;    /* this is a double sided dimm
 921                                                  * to save the next row #
 922                                                  */
 923                                 row++;
 924                                 last = value;
 925                         }
 926                 }
 927         }
 928
 929         /* set the map type.  1 = normal, 0 = reversed */
 930         pci_read_config_byte(mci->pdev, E752X_DRM, &stat8);
 931         pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
 932
 933         mci->edac_cap |= EDAC_FLAG_NONE;
 934         debugf3("%s(): tolm, remapbase, remaplimit\n", __func__);
 935
 936         /* load the top of low memory, remap base, and remap limit vars */
 937         pci_read_config_word(mci->pdev, E752X_TOLM, &pci_data);
 938         pvt->tolm = ((u32) pci_data) << 4;
 939         pci_read_config_word(mci->pdev, E752X_REMAPBASE, &pci_data);
 940         pvt->remapbase = ((u32) pci_data) << 14;
 941         pci_read_config_word(mci->pdev, E752X_REMAPLIMIT, &pci_data);
 942         pvt->remaplimit = ((u32) pci_data) << 14;
 943         e752x_printk(KERN_INFO,
 944                 "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
 945                 pvt->remapbase, pvt->remaplimit);
 946
 947         if (edac_mc_add_mc(mci)) {
 948                 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
 949                 goto fail;
 950         }
 951
 952         dev = pci_get_device(PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].ctl_dev,
 953                         NULL);
 954         pvt->dev_d0f0 = dev;
 955         /* find the error reporting device and clear errors */
 956         dev = pvt->dev_d0f1 = pci_dev_get(pvt->bridge_ck);
 957         /* Turn off error disable & SMI in case the BIOS turned it on */
 958         pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00);
 959         pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00);
 960         pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x00);
 961         pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00);
 962         pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00);
 963         pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00);
 964         pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00);
 965         pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00);
 966
 967         e752x_get_error_info(mci, &discard); /* clear other MCH errors */
 968
 969         /* get this far and it's successful */
 970         debugf3("%s(): success\n", __func__);
 971         return 0;
 972
 973 fail:
 974         if (mci) {
 975                 if (pvt->dev_d0f0)
 976                         pci_dev_put(pvt->dev_d0f0);
 977
 978                 if (pvt->dev_d0f1)
 979                         pci_dev_put(pvt->dev_d0f1);
 980
 981                 if (pvt->bridge_ck)
 982                         pci_dev_put(pvt->bridge_ck);
 983
 984                 edac_mc_free(mci);
 985         }
 986
 987         return rc;
 988 }
 989
 990 /* returns count (>= 0), or negative on error */
 991 static int __devinit e752x_init_one(struct pci_dev *pdev,
 992                 const struct pci_device_id *ent)
 993 {
 994         debugf0("%s()\n", __func__);
 995
 996         /* wake up and enable device */
 997         if(pci_enable_device(pdev) < 0)
 998                 return -EIO;
 999
1000         return e752x_probe1(pdev, ent->driver_data);
1001 }
1002
1003 static void __devexit e752x_remove_one(struct pci_dev *pdev)
1004 {
1005         struct mem_ctl_info *mci;
1006         struct e752x_pvt *pvt;
1007
1008         debugf0("%s()\n", __func__);
1009
1010         if ((mci = edac_mc_del_mc(pdev)) == NULL)
1011                 return;
1012
1013         pvt = (struct e752x_pvt *) mci->pvt_info;
1014         pci_dev_put(pvt->dev_d0f0);
1015         pci_dev_put(pvt->dev_d0f1);
1016         pci_dev_put(pvt->bridge_ck);
1017         edac_mc_free(mci);
1018 }
1019
1020 static const struct pci_device_id e752x_pci_tbl[] __devinitdata = {
1021         {
1022                 PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1023                 E7520
1024         },
1025         {
1026                 PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1027                 E7525
1028         },
1029         {
1030                 PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1031                 E7320
1032         },
1033         {
1034                 0,
1035         }       /* 0 terminated list. */
1036 };
1037
1038 MODULE_DEVICE_TABLE(pci, e752x_pci_tbl);
1039
1040 static struct pci_driver e752x_driver = {
1041         .name = EDAC_MOD_STR,
1042         .probe = e752x_init_one,
1043         .remove = __devexit_p(e752x_remove_one),
1044         .id_table = e752x_pci_tbl,
1045 };
1046
1047 static int __init e752x_init(void)
1048 {
1049         int pci_rc;
1050
1051         debugf3("%s()\n", __func__);
1052         pci_rc = pci_register_driver(&e752x_driver);
1053         return (pci_rc < 0) ? pci_rc : 0;
1054 }
1055
1056 static void __exit e752x_exit(void)
1057 {
1058         debugf3("%s()\n", __func__);
1059         pci_unregister_driver(&e752x_driver);
1060 }
1061
1062 module_init(e752x_init);
1063 module_exit(e752x_exit);
1064
1065 MODULE_LICENSE("GPL");
1066 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n");
1067 MODULE_DESCRIPTION("MC support for Intel e752x memory controllers");