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
  21 #include <linux/config.h>
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24
  25 #include <linux/pci.h>
  26 #include <linux/pci_ids.h>
  27
  28 #include <linux/slab.h>
  29
  30 #include "edac_mc.h"
  31
  32
  33 #define e752x_printk(level, fmt, arg...) \
  34     edac_printk(level, "e752x", fmt, ##arg)
  35
  36
  37 #define e752x_mc_printk(mci, level, fmt, arg...) \
  38     edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg)
  39
  40
  41 #ifndef PCI_DEVICE_ID_INTEL_7520_0
  42 #define PCI_DEVICE_ID_INTEL_7520_0      0x3590
  43 #endif                          /* PCI_DEVICE_ID_INTEL_7520_0      */
  44
  45 #ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR
  46 #define PCI_DEVICE_ID_INTEL_7520_1_ERR  0x3591
  47 #endif                          /* PCI_DEVICE_ID_INTEL_7520_1_ERR  */
  48
  49 #ifndef PCI_DEVICE_ID_INTEL_7525_0
  50 #define PCI_DEVICE_ID_INTEL_7525_0      0x359E
  51 #endif                          /* PCI_DEVICE_ID_INTEL_7525_0      */
  52
  53 #ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR
  54 #define PCI_DEVICE_ID_INTEL_7525_1_ERR  0x3593
  55 #endif                          /* PCI_DEVICE_ID_INTEL_7525_1_ERR  */
  56
  57 #ifndef PCI_DEVICE_ID_INTEL_7320_0
  58 #define PCI_DEVICE_ID_INTEL_7320_0      0x3592
  59 #endif                          /* PCI_DEVICE_ID_INTEL_7320_0 */
  60
  61 #ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR
  62 #define PCI_DEVICE_ID_INTEL_7320_1_ERR  0x3593
  63 #endif                          /* PCI_DEVICE_ID_INTEL_7320_1_ERR */
  64
  65 #define E752X_NR_CSROWS         8       /* number of csrows */
  66
  67
  68 /* E752X register addresses - device 0 function 0 */
  69 #define E752X_DRB               0x60    /* DRAM row boundary register (8b) */
  70 #define E752X_DRA               0x70    /* DRAM row attribute register (8b) */
  71                                         /*
  72                                          * 31:30   Device width row 7
  73                                          *      01=x8 10=x4 11=x8 DDR2
  74                                          * 27:26   Device width row 6
  75                                          * 23:22   Device width row 5
  76                                          * 19:20   Device width row 4
  77                                          * 15:14   Device width row 3
  78                                          * 11:10   Device width row 2
  79                                          *  7:6    Device width row 1
  80                                          *  3:2    Device width row 0
  81                                          */
  82 #define E752X_DRC               0x7C    /* DRAM controller mode reg (32b) */
  83                                         /* FIXME:IS THIS RIGHT? */
  84                                         /*
  85                                          * 22    Number channels 0=1,1=2
  86                                          * 19:18 DRB Granularity 32/64MB
  87                                          */
  88 #define E752X_DRM               0x80    /* Dimm mapping register */
  89 #define E752X_DDRCSR            0x9A    /* DDR control and status reg (16b) */
  90                                         /*
  91                                          * 14:12 1 single A, 2 single B, 3 dual
  92                                          */
  93 #define E752X_TOLM              0xC4    /* DRAM top of low memory reg (16b) */
  94 #define E752X_REMAPBASE         0xC6    /* DRAM remap base address reg (16b) */
  95 #define E752X_REMAPLIMIT        0xC8    /* DRAM remap limit address reg (16b) */
  96 #define E752X_REMAPOFFSET       0xCA    /* DRAM remap limit offset reg (16b) */
  97
  98 /* E752X register addresses - device 0 function 1 */
  99 #define E752X_FERR_GLOBAL       0x40    /* Global first error register (32b) */
 100 #define E752X_NERR_GLOBAL       0x44    /* Global next error register (32b) */
 101 #define E752X_HI_FERR           0x50    /* Hub interface first error reg (8b) */
 102 #define E752X_HI_NERR           0x52    /* Hub interface next error reg (8b) */
 103 #define E752X_HI_ERRMASK        0x54    /* Hub interface error mask reg (8b) */
 104 #define E752X_HI_SMICMD         0x5A    /* Hub interface SMI command reg (8b) */
 105 #define E752X_SYSBUS_FERR       0x60    /* System buss first error reg (16b) */
 106 #define E752X_SYSBUS_NERR       0x62    /* System buss next error reg (16b) */
 107 #define E752X_SYSBUS_ERRMASK    0x64    /* System buss error mask reg (16b) */
 108 #define E752X_SYSBUS_SMICMD     0x6A    /* System buss SMI command reg (16b) */
 109 #define E752X_BUF_FERR          0x70    /* Memory buffer first error reg (8b) */
 110 #define E752X_BUF_NERR          0x72    /* Memory buffer next error reg (8b) */
 111 #define E752X_BUF_ERRMASK       0x74    /* Memory buffer error mask reg (8b) */
 112 #define E752X_BUF_SMICMD        0x7A    /* Memory buffer SMI command reg (8b) */
 113 #define E752X_DRAM_FERR         0x80    /* DRAM first error register (16b) */
 114 #define E752X_DRAM_NERR         0x82    /* DRAM next error register (16b) */
 115 #define E752X_DRAM_ERRMASK      0x84    /* DRAM error mask register (8b) */
 116 #define E752X_DRAM_SMICMD       0x8A    /* DRAM SMI command register (8b) */
 117 #define E752X_DRAM_RETR_ADD     0xAC    /* DRAM Retry address register (32b) */
 118 #define E752X_DRAM_SEC1_ADD     0xA0    /* 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_SEC2_ADD     0xC8    /* DRAM first correctable 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_DED_ADD      0xA4    /* DRAM first uncorrectable 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_SCRB_ADD     0xA8    /* DRAM first uncorrectable scrub memory */
 143                                         /*     error address register (32b) */
 144                                         /*
 145                                          * 31    Reserved
 146                                          * 30:2  CE address (64 byte block 34:6)
 147                                          * 1     Reserved
 148                                          * 0     HiLoCS
 149                                          */
 150 #define E752X_DRAM_SEC1_SYNDROME 0xC4   /* DRAM first correctable memory */
 151                                         /*     error syndrome register (16b) */
 152 #define E752X_DRAM_SEC2_SYNDROME 0xC6   /* DRAM second correctable memory */
 153                                         /*     error syndrome register (16b) */
 154 #define E752X_DEVPRES1          0xF4    /* Device Present 1 register (8b) */
 155
 156 /* ICH5R register addresses - device 30 function 0 */
 157 #define ICH5R_PCI_STAT          0x06    /* PCI status register (16b) */
 158 #define ICH5R_PCI_2ND_STAT      0x1E    /* PCI status secondary reg (16b) */
 159 #define ICH5R_PCI_BRIDGE_CTL    0x3E    /* PCI bridge control register (16b) */
 160
 161 enum e752x_chips {
 162         E7520 = 0,
 163         E7525 = 1,
 164         E7320 = 2
 165 };
 166
 167
 168 struct e752x_pvt {
 169         struct pci_dev *bridge_ck;
 170         struct pci_dev *dev_d0f0;
 171         struct pci_dev *dev_d0f1;
 172         u32 tolm;
 173         u32 remapbase;
 174         u32 remaplimit;
 175         int mc_symmetric;
 176         u8 map[8];
 177         int map_type;
 178         const struct e752x_dev_info *dev_info;
 179 };
 180
 181
 182 struct e752x_dev_info {
 183         u16 err_dev;
 184         u16 ctl_dev;
 185         const char *ctl_name;
 186 };
 187
 188 struct e752x_error_info {
 189         u32 ferr_global;
 190         u32 nerr_global;
 191         u8 hi_ferr;
 192         u8 hi_nerr;
 193         u16 sysbus_ferr;
 194         u16 sysbus_nerr;
 195         u8 buf_ferr;
 196         u8 buf_nerr;
 197         u16 dram_ferr;
 198         u16 dram_nerr;
 199         u32 dram_sec1_add;
 200         u32 dram_sec2_add;
 201         u16 dram_sec1_syndrome;
 202         u16 dram_sec2_syndrome;
 203         u32 dram_ded_add;
 204         u32 dram_scrb_add;
 205         u32 dram_retr_add;
 206 };
 207
 208 static const struct e752x_dev_info e752x_devs[] = {
 209         [E7520] = {
 210                    .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR,
 211                    .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0,
 212                    .ctl_name = "E7520"},
 213         [E7525] = {
 214                    .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
 215                    .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0,
 216                    .ctl_name = "E7525"},
 217         [E7320] = {
 218                    .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
 219                    .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0,
 220                    .ctl_name = "E7320"},
 221 };
 222
 223
 224 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
 225                                       unsigned long page)
 226 {
 227         u32 remap;
 228         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 229
 230         debugf3("%s()\n", __func__);
 231
 232         if (page < pvt->tolm)
 233                 return page;
 234         if ((page >= 0x100000) && (page < pvt->remapbase))
 235                 return page;
 236         remap = (page - pvt->tolm) + pvt->remapbase;
 237         if (remap < pvt->remaplimit)
 238                 return remap;
 239         e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
 240         return pvt->tolm - 1;
 241 }
 242
 243 static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
 244                        u32 sec1_add, u16 sec1_syndrome)
 245 {
 246         u32 page;
 247         int row;
 248         int channel;
 249         int i;
 250         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 251
 252         debugf3("%s()\n", __func__);
 253
 254         /* convert the addr to 4k page */
 255         page = sec1_add >> (PAGE_SHIFT - 4);
 256
 257         /* FIXME - check for -1 */
 258         if (pvt->mc_symmetric) {
 259                 /* chip select are bits 14 & 13 */
 260                 row = ((page >> 1) & 3);
 261                 e752x_printk(KERN_WARNING,
 262                              "Test row %d Table %d %d %d %d %d %d %d %d\n",
 263                              row, pvt->map[0], pvt->map[1], pvt->map[2],
 264                              pvt->map[3], pvt->map[4], pvt->map[5],
 265                              pvt->map[6], pvt->map[7]);
 266
 267                 /* test for channel remapping */
 268                 for (i = 0; i < 8; i++) {
 269                         if (pvt->map[i] == row)
 270                                 break;
 271                 }
 272                 e752x_printk(KERN_WARNING, "Test computed row %d\n", i);
 273                 if (i < 8)
 274                         row = i;
 275                 else
 276                         e752x_mc_printk(mci, KERN_WARNING,
 277                             "row %d not found in remap table\n", row);
 278         } else
 279                 row = edac_mc_find_csrow_by_page(mci, page);
 280         /* 0 = channel A, 1 = channel B */
 281         channel = !(error_one & 1);
 282
 283         if (!pvt->map_type)
 284                 row = 7 - row;
 285         edac_mc_handle_ce(mci, page, 0, sec1_syndrome, row, channel,
 286             "e752x CE");
 287 }
 288
 289
 290 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
 291                 u32 sec1_add, u16 sec1_syndrome, int *error_found,
 292                 int handle_error)
 293 {
 294         *error_found = 1;
 295
 296         if (handle_error)
 297                 do_process_ce(mci, error_one, sec1_add, sec1_syndrome);
 298 }
 299
 300 static void do_process_ue(struct mem_ctl_info *mci, u16 error_one, u32 ded_add,
 301                 u32 scrb_add)
 302 {
 303         u32 error_2b, block_page;
 304         int row;
 305         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 306
 307         debugf3("%s()\n", __func__);
 308
 309         if (error_one & 0x0202) {
 310                 error_2b = ded_add;
 311                 /* convert to 4k address */
 312                 block_page = error_2b >> (PAGE_SHIFT - 4);
 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                 edac_mc_handle_ue(mci, block_page, 0, row,
 318                                        "e752x UE from Read");
 319         }
 320         if (error_one & 0x0404) {
 321                 error_2b = scrb_add;
 322                 /* convert to 4k address */
 323                 block_page = error_2b >> (PAGE_SHIFT - 4);
 324                 row = pvt->mc_symmetric ?
 325                     /* chip select are bits 14 & 13 */
 326                     ((block_page >> 1) & 3) :
 327                     edac_mc_find_csrow_by_page(mci, block_page);
 328                 edac_mc_handle_ue(mci, block_page, 0, row,
 329                                        "e752x UE from Scruber");
 330         }
 331 }
 332
 333 static inline void process_ue(struct mem_ctl_info *mci, u16 error_one,
 334                 u32 ded_add, u32 scrb_add, int *error_found, int handle_error)
 335 {
 336         *error_found = 1;
 337
 338         if (handle_error)
 339                 do_process_ue(mci, error_one, ded_add, scrb_add);
 340 }
 341
 342 static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
 343                 int *error_found, int handle_error)
 344 {
 345         *error_found = 1;
 346
 347         if (!handle_error)
 348                 return;
 349
 350         debugf3("%s()\n", __func__);
 351         edac_mc_handle_ue_no_info(mci, "e752x UE log memory write");
 352 }
 353
 354 static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
 355                 u32 retry_add)
 356 {
 357         u32 error_1b, page;
 358         int row;
 359         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 360
 361         error_1b = retry_add;
 362         page = error_1b >> (PAGE_SHIFT - 4);    /* convert the addr to 4k page */
 363         row = pvt->mc_symmetric ?
 364             ((page >> 1) & 3) : /* chip select are bits 14 & 13 */
 365             edac_mc_find_csrow_by_page(mci, page);
 366         e752x_mc_printk(mci, KERN_WARNING,
 367             "CE page 0x%lx, row %d : Memory read retry\n",
 368             (long unsigned int) page, row);
 369 }
 370
 371 static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error,
 372                 u32 retry_add, int *error_found, int handle_error)
 373 {
 374         *error_found = 1;
 375
 376         if (handle_error)
 377                 do_process_ded_retry(mci, error, retry_add);
 378 }
 379
 380 static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error,
 381                 int *error_found, int handle_error)
 382 {
 383         *error_found = 1;
 384
 385         if (handle_error)
 386                 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n");
 387 }
 388
 389 static char *global_message[11] = {
 390         "PCI Express C1", "PCI Express C", "PCI Express B1",
 391         "PCI Express B", "PCI Express A1", "PCI Express A",
 392         "DMA Controler", "HUB Interface", "System Bus",
 393         "DRAM Controler", "Internal Buffer"
 394 };
 395
 396 static char *fatal_message[2] = { "Non-Fatal ", "Fatal " };
 397
 398 static void do_global_error(int fatal, u32 errors)
 399 {
 400         int i;
 401
 402         for (i = 0; i < 11; i++) {
 403                 if (errors & (1 << i))
 404                         e752x_printk(KERN_WARNING, "%sError %s\n",
 405                                fatal_message[fatal], global_message[i]);
 406         }
 407 }
 408
 409 static inline void global_error(int fatal, u32 errors, int *error_found,
 410                 int handle_error)
 411 {
 412         *error_found = 1;
 413
 414         if (handle_error)
 415                 do_global_error(fatal, errors);
 416 }
 417
 418 static char *hub_message[7] = {
 419         "HI Address or Command Parity", "HI Illegal Access",
 420         "HI Internal Parity", "Out of Range Access",
 421         "HI Data Parity", "Enhanced Config Access",
 422         "Hub Interface Target Abort"
 423 };
 424
 425 static void do_hub_error(int fatal, u8 errors)
 426 {
 427         int i;
 428
 429         for (i = 0; i < 7; i++) {
 430                 if (errors & (1 << i))
 431                         e752x_printk(KERN_WARNING, "%sError %s\n",
 432                                fatal_message[fatal], hub_message[i]);
 433         }
 434 }
 435
 436 static inline void hub_error(int fatal, u8 errors, int *error_found,
 437                 int handle_error)
 438 {
 439         *error_found = 1;
 440
 441         if (handle_error)
 442                 do_hub_error(fatal, errors);
 443 }
 444
 445 static char *membuf_message[4] = {
 446         "Internal PMWB to DRAM parity",
 447         "Internal PMWB to System Bus Parity",
 448         "Internal System Bus or IO to PMWB Parity",
 449         "Internal DRAM to PMWB Parity"
 450 };
 451
 452 static void do_membuf_error(u8 errors)
 453 {
 454         int i;
 455
 456         for (i = 0; i < 4; i++) {
 457                 if (errors & (1 << i))
 458                         e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n",
 459                                membuf_message[i]);
 460         }
 461 }
 462
 463 static inline void membuf_error(u8 errors, int *error_found, int handle_error)
 464 {
 465         *error_found = 1;
 466
 467         if (handle_error)
 468                 do_membuf_error(errors);
 469 }
 470
 471 #if 0
 472 char *sysbus_message[10] = {
 473         "Addr or Request Parity",
 474         "Data Strobe Glitch",
 475         "Addr Strobe Glitch",
 476         "Data Parity",
 477         "Addr Above TOM",
 478         "Non DRAM Lock Error",
 479         "MCERR", "BINIT",
 480         "Memory Parity",
 481         "IO Subsystem Parity"
 482 };
 483 #endif  /*  0  */
 484
 485 static void do_sysbus_error(int fatal, u32 errors)
 486 {
 487         int i;
 488
 489         for (i = 0; i < 10; i++) {
 490                 if (errors & (1 << i))
 491                         e752x_printk(KERN_WARNING, "%sError System Bus %s\n",
 492                                fatal_message[fatal], global_message[i]);
 493         }
 494 }
 495
 496 static inline void sysbus_error(int fatal, u32 errors, int *error_found,
 497                 int handle_error)
 498 {
 499         *error_found = 1;
 500
 501         if (handle_error)
 502                 do_sysbus_error(fatal, errors);
 503 }
 504
 505 static void e752x_check_hub_interface (struct e752x_error_info *info,
 506                 int *error_found, int handle_error)
 507 {
 508         u8 stat8;
 509
 510         //pci_read_config_byte(dev,E752X_HI_FERR,&stat8);
 511         stat8 = info->hi_ferr;
 512         if(stat8 & 0x7f) { /* Error, so process */
 513                 stat8 &= 0x7f;
 514                 if(stat8 & 0x2b)
 515                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 516                 if(stat8 & 0x54)
 517                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 518         }
 519         //pci_read_config_byte(dev,E752X_HI_NERR,&stat8);
 520         stat8 = info->hi_nerr;
 521         if(stat8 & 0x7f) { /* Error, so process */
 522                 stat8 &= 0x7f;
 523                 if (stat8 & 0x2b)
 524                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 525                 if(stat8 & 0x54)
 526                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 527         }
 528 }
 529
 530 static void e752x_check_sysbus (struct e752x_error_info *info, int *error_found,
 531                 int handle_error)
 532 {
 533         u32 stat32, error32;
 534
 535         //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32);
 536         stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16);
 537
 538         if (stat32 == 0)
 539                 return;  /* no errors */
 540
 541         error32 = (stat32 >> 16) & 0x3ff;
 542         stat32 = stat32 & 0x3ff;
 543         if(stat32 & 0x083)
 544                 sysbus_error(1, stat32 & 0x083, error_found, handle_error);
 545         if(stat32 & 0x37c)
 546                 sysbus_error(0, stat32 & 0x37c, error_found, handle_error);
 547         if(error32 & 0x083)
 548                 sysbus_error(1, error32 & 0x083, error_found, handle_error);
 549         if(error32 & 0x37c)
 550                 sysbus_error(0, error32 & 0x37c, error_found, handle_error);
 551 }
 552
 553 static void e752x_check_membuf (struct e752x_error_info *info, int *error_found,
 554                 int handle_error)
 555 {
 556         u8 stat8;
 557
 558         stat8 = info->buf_ferr;
 559         if (stat8 & 0x0f) { /* Error, so process */
 560                 stat8 &= 0x0f;
 561                 membuf_error(stat8, error_found, handle_error);
 562         }
 563         stat8 = info->buf_nerr;
 564         if (stat8 & 0x0f) { /* Error, so process */
 565                 stat8 &= 0x0f;
 566                 membuf_error(stat8, error_found, handle_error);
 567         }
 568 }
 569
 570 static void e752x_check_dram (struct mem_ctl_info *mci,
 571                 struct e752x_error_info *info, int *error_found, int handle_error)
 572 {
 573         u16 error_one, error_next;
 574
 575         error_one = info->dram_ferr;
 576         error_next = info->dram_nerr;
 577
 578         /* decode and report errors */
 579         if(error_one & 0x0101)  /* check first error correctable */
 580                 process_ce(mci, error_one, info->dram_sec1_add,
 581                            info->dram_sec1_syndrome, error_found,
 582                            handle_error);
 583
 584         if(error_next & 0x0101)  /* check next error correctable */
 585                 process_ce(mci, error_next, info->dram_sec2_add,
 586                            info->dram_sec2_syndrome, error_found,
 587                            handle_error);
 588
 589         if(error_one & 0x4040)
 590                 process_ue_no_info_wr(mci, error_found, handle_error);
 591
 592         if(error_next & 0x4040)
 593                 process_ue_no_info_wr(mci, error_found, handle_error);
 594
 595         if(error_one & 0x2020)
 596                 process_ded_retry(mci, error_one, info->dram_retr_add,
 597                                   error_found, handle_error);
 598
 599         if(error_next & 0x2020)
 600                 process_ded_retry(mci, error_next, info->dram_retr_add,
 601                                   error_found, handle_error);
 602
 603         if(error_one & 0x0808)
 604                 process_threshold_ce(mci, error_one, error_found,
 605                                      handle_error);
 606
 607         if(error_next & 0x0808)
 608                 process_threshold_ce(mci, error_next, error_found,
 609                                      handle_error);
 610
 611         if(error_one & 0x0606)
 612                 process_ue(mci, error_one, info->dram_ded_add,
 613                            info->dram_scrb_add, error_found, handle_error);
 614
 615         if(error_next & 0x0606)
 616                 process_ue(mci, error_next, info->dram_ded_add,
 617                            info->dram_scrb_add, error_found, handle_error);
 618 }
 619
 620 static void e752x_get_error_info (struct mem_ctl_info *mci,
 621                                   struct e752x_error_info *info)
 622 {
 623         struct pci_dev *dev;
 624         struct e752x_pvt *pvt;
 625
 626         memset(info, 0, sizeof(*info));
 627         pvt = (struct e752x_pvt *) mci->pvt_info;
 628         dev = pvt->dev_d0f1;
 629
 630         pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global);
 631
 632         if (info->ferr_global) {
 633                 pci_read_config_byte(dev, E752X_HI_FERR, &info->hi_ferr);
 634                 pci_read_config_word(dev, E752X_SYSBUS_FERR,
 635                                 &info->sysbus_ferr);
 636                 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr);
 637                 pci_read_config_word(dev, E752X_DRAM_FERR,
 638                                 &info->dram_ferr);
 639                 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD,
 640                                 &info->dram_sec1_add);
 641                 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME,
 642                                 &info->dram_sec1_syndrome);
 643                 pci_read_config_dword(dev, E752X_DRAM_DED_ADD,
 644                                 &info->dram_ded_add);
 645                 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD,
 646                                 &info->dram_scrb_add);
 647                 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD,
 648                                 &info->dram_retr_add);
 649
 650                 if (info->hi_ferr & 0x7f)
 651                         pci_write_config_byte(dev, E752X_HI_FERR,
 652                                         info->hi_ferr);
 653
 654                 if (info->sysbus_ferr)
 655                         pci_write_config_word(dev, E752X_SYSBUS_FERR,
 656                                         info->sysbus_ferr);
 657
 658                 if (info->buf_ferr & 0x0f)
 659                         pci_write_config_byte(dev, E752X_BUF_FERR,
 660                                         info->buf_ferr);
 661
 662                 if (info->dram_ferr)
 663                         pci_write_bits16(pvt->bridge_ck, E752X_DRAM_FERR,
 664                                         info->dram_ferr, info->dram_ferr);
 665
 666                 pci_write_config_dword(dev, E752X_FERR_GLOBAL,
 667                                 info->ferr_global);
 668         }
 669
 670         pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global);
 671
 672         if (info->nerr_global) {
 673                 pci_read_config_byte(dev, E752X_HI_NERR, &info->hi_nerr);
 674                 pci_read_config_word(dev, E752X_SYSBUS_NERR,
 675                                 &info->sysbus_nerr);
 676                 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr);
 677                 pci_read_config_word(dev, E752X_DRAM_NERR,
 678                                 &info->dram_nerr);
 679                 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD,
 680                                 &info->dram_sec2_add);
 681                 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME,
 682                                 &info->dram_sec2_syndrome);
 683
 684                 if (info->hi_nerr & 0x7f)
 685                         pci_write_config_byte(dev, E752X_HI_NERR,
 686                                         info->hi_nerr);
 687
 688                 if (info->sysbus_nerr)
 689                         pci_write_config_word(dev, E752X_SYSBUS_NERR,
 690                                         info->sysbus_nerr);
 691
 692                 if (info->buf_nerr & 0x0f)
 693                         pci_write_config_byte(dev, E752X_BUF_NERR,
 694                                         info->buf_nerr);
 695
 696                 if (info->dram_nerr)
 697                         pci_write_bits16(pvt->bridge_ck, E752X_DRAM_NERR,
 698                                         info->dram_nerr, info->dram_nerr);
 699
 700                 pci_write_config_dword(dev, E752X_NERR_GLOBAL,
 701                                 info->nerr_global);
 702         }
 703 }
 704
 705 static int e752x_process_error_info (struct mem_ctl_info *mci,
 706                 struct e752x_error_info *info, int handle_errors)
 707 {
 708         u32 error32, stat32;
 709         int error_found;
 710
 711         error_found = 0;
 712         error32 = (info->ferr_global >> 18) & 0x3ff;
 713         stat32 = (info->ferr_global >> 4) & 0x7ff;
 714
 715         if (error32)
 716                 global_error(1, error32, &error_found, handle_errors);
 717
 718         if (stat32)
 719                 global_error(0, stat32, &error_found, handle_errors);
 720
 721         error32 = (info->nerr_global >> 18) & 0x3ff;
 722         stat32 = (info->nerr_global >> 4) & 0x7ff;
 723
 724         if (error32)
 725                 global_error(1, error32, &error_found, handle_errors);
 726
 727         if (stat32)
 728                 global_error(0, stat32, &error_found, handle_errors);
 729
 730         e752x_check_hub_interface(info, &error_found, handle_errors);
 731         e752x_check_sysbus(info, &error_found, handle_errors);
 732         e752x_check_membuf(info, &error_found, handle_errors);
 733         e752x_check_dram(mci, info, &error_found, handle_errors);
 734         return error_found;
 735 }
 736
 737 static void e752x_check(struct mem_ctl_info *mci)
 738 {
 739         struct e752x_error_info info;
 740         debugf3("%s()\n", __func__);
 741         e752x_get_error_info(mci, &info);
 742         e752x_process_error_info(mci, &info, 1);
 743 }
 744
 745 static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
 746 {
 747         int rc = -ENODEV;
 748         int index;
 749         u16 pci_data;
 750         u8 stat8;
 751         struct mem_ctl_info *mci = NULL;
 752         struct e752x_pvt *pvt = NULL;
 753         u16 ddrcsr;
 754         u32 drc;
 755         int drc_chan;           /* Number of channels 0=1chan,1=2chan */
 756         int drc_drbg;           /* DRB granularity 0=64mb,1=128mb */
 757         int drc_ddim;           /* DRAM Data Integrity Mode 0=none,2=edac */
 758         u32 dra;
 759         unsigned long last_cumul_size;
 760         struct pci_dev *dev = NULL;
 761         struct e752x_error_info discard;
 762
 763         debugf0("%s(): mci\n", __func__);
 764         debugf0("Starting Probe1\n");
 765
 766         /* enable device 0 function 1 */
 767         pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
 768         stat8 |= (1 << 5);
 769         pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
 770
 771         /* need to find out the number of channels */
 772         pci_read_config_dword(pdev, E752X_DRC, &drc);
 773         pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr);
 774         /* FIXME: should check >>12 or 0xf, true for all? */
 775         /* Dual channel = 1, Single channel = 0 */
 776         drc_chan = (((ddrcsr >> 12) & 3) == 3);
 777         drc_drbg = drc_chan + 1;        /* 128 in dual mode, 64 in single */
 778         drc_ddim = (drc >> 20) & 0x3;
 779
 780         mci = edac_mc_alloc(sizeof(*pvt), E752X_NR_CSROWS, drc_chan + 1);
 781
 782         if (mci == NULL) {
 783                 rc = -ENOMEM;
 784                 goto fail;
 785         }
 786
 787         debugf3("%s(): init mci\n", __func__);
 788
 789         mci->mtype_cap = MEM_FLAG_RDDR;
 790         mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED |
 791             EDAC_FLAG_S4ECD4ED;
 792         /* FIXME - what if different memory types are in different csrows? */
 793         mci->mod_name = EDAC_MOD_STR;
 794         mci->mod_ver = "$Revision: 1.5.2.11 $";
 795         mci->pdev = pdev;
 796
 797         debugf3("%s(): init pvt\n", __func__);
 798         pvt = (struct e752x_pvt *) mci->pvt_info;
 799         pvt->dev_info = &e752x_devs[dev_idx];
 800         pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
 801                                          pvt->dev_info->err_dev,
 802                                          pvt->bridge_ck);
 803         if (pvt->bridge_ck == NULL)
 804                 pvt->bridge_ck = pci_scan_single_device(pdev->bus,
 805                                                         PCI_DEVFN(0, 1));
 806         if (pvt->bridge_ck == NULL) {
 807                 e752x_printk(KERN_ERR, "error reporting device not found:"
 808                        "vendor %x device 0x%x (broken BIOS?)\n",
 809                        PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
 810                 goto fail;
 811         }
 812         pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
 813
 814         debugf3("%s(): more mci init\n", __func__);
 815         mci->ctl_name = pvt->dev_info->ctl_name;
 816         mci->edac_check = e752x_check;
 817         mci->ctl_page_to_phys = ctl_page_to_phys;
 818
 819         /* find out the device types */
 820         pci_read_config_dword(pdev, E752X_DRA, &dra);
 821
 822         /*
 823          * The dram row boundary (DRB) reg values are boundary address for
 824          * each DRAM row with a granularity of 64 or 128MB (single/dual
 825          * channel operation).  DRB regs are cumulative; therefore DRB7 will
 826          * contain the total memory contained in all eight rows.
 827          */
 828         for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) {
 829                 u8 value;
 830                 u32 cumul_size;
 831                 /* mem_dev 0=x8, 1=x4 */
 832                 int mem_dev = (dra >> (index * 4 + 2)) & 0x3;
 833                 struct csrow_info *csrow = &mci->csrows[index];
 834
 835                 mem_dev = (mem_dev == 2);
 836                 pci_read_config_byte(mci->pdev, E752X_DRB + index, &value);
 837                 /* convert a 128 or 64 MiB DRB to a page size. */
 838                 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
 839                 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
 840                         cumul_size);
 841                 if (cumul_size == last_cumul_size)
 842                         continue;       /* not populated */
 843
 844                 csrow->first_page = last_cumul_size;
 845                 csrow->last_page = cumul_size - 1;
 846                 csrow->nr_pages = cumul_size - last_cumul_size;
 847                 last_cumul_size = cumul_size;
 848                 csrow->grain = 1 << 12; /* 4KiB - resolution of CELOG */
 849                 csrow->mtype = MEM_RDDR;        /* only one type supported */
 850                 csrow->dtype = mem_dev ? DEV_X4 : DEV_X8;
 851
 852                 /*
 853                  * if single channel or x8 devices then SECDED
 854                  * if dual channel and x4 then S4ECD4ED
 855                  */
 856                 if (drc_ddim) {
 857                         if (drc_chan && mem_dev) {
 858                                 csrow->edac_mode = EDAC_S4ECD4ED;
 859                                 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
 860                         } else {
 861                                 csrow->edac_mode = EDAC_SECDED;
 862                                 mci->edac_cap |= EDAC_FLAG_SECDED;
 863                         }
 864                 } else
 865                         csrow->edac_mode = EDAC_NONE;
 866         }
 867
 868         /* Fill in the memory map table */
 869         {
 870                 u8 value;
 871                 u8 last = 0;
 872                 u8 row = 0;
 873                 for (index = 0; index < 8; index += 2) {
 874
 875                         pci_read_config_byte(mci->pdev, E752X_DRB + index,
 876                                              &value);
 877                         /* test if there is a dimm in this slot */
 878                         if (value == last) {
 879                                 /* no dimm in the slot, so flag it as empty */
 880                                 pvt->map[index] = 0xff;
 881                                 pvt->map[index + 1] = 0xff;
 882                         } else {        /* there is a dimm in the slot */
 883                                 pvt->map[index] = row;
 884                                 row++;
 885                                 last = value;
 886                                 /* test the next value to see if the dimm is
 887                                    double sided */
 888                                 pci_read_config_byte(mci->pdev,
 889                                                      E752X_DRB + index + 1,
 890                                                      &value);
 891                                 pvt->map[index + 1] = (value == last) ?
 892                                     0xff :      /* the dimm is single sided,
 893                                                    so flag as empty */
 894                                     row;        /* this is a double sided dimm
 895                                                    to save the next row # */
 896                                 row++;
 897                                 last = value;
 898                         }
 899                 }
 900         }
 901
 902         /* set the map type.  1 = normal, 0 = reversed */
 903         pci_read_config_byte(mci->pdev, E752X_DRM, &stat8);
 904         pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
 905
 906         mci->edac_cap |= EDAC_FLAG_NONE;
 907
 908         debugf3("%s(): tolm, remapbase, remaplimit\n", __func__);
 909         /* load the top of low memory, remap base, and remap limit vars */
 910         pci_read_config_word(mci->pdev, E752X_TOLM, &pci_data);
 911         pvt->tolm = ((u32) pci_data) << 4;
 912         pci_read_config_word(mci->pdev, E752X_REMAPBASE, &pci_data);
 913         pvt->remapbase = ((u32) pci_data) << 14;
 914         pci_read_config_word(mci->pdev, E752X_REMAPLIMIT, &pci_data);
 915         pvt->remaplimit = ((u32) pci_data) << 14;
 916         e752x_printk(KERN_INFO,
 917                      "tolm = %x, remapbase = %x, remaplimit = %x\n",
 918                      pvt->tolm, pvt->remapbase, pvt->remaplimit);
 919
 920         if (edac_mc_add_mc(mci)) {
 921                 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
 922                 goto fail;
 923         }
 924
 925         dev = pci_get_device(PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].ctl_dev,
 926                              NULL);
 927         pvt->dev_d0f0 = dev;
 928         /* find the error reporting device and clear errors */
 929         dev = pvt->dev_d0f1 = pci_dev_get(pvt->bridge_ck);
 930         /* Turn off error disable & SMI in case the BIOS turned it on */
 931         pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00);
 932         pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00);
 933         pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x00);
 934         pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00);
 935         pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00);
 936         pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00);
 937         pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00);
 938         pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00);
 939         /* clear other MCH errors */
 940         e752x_get_error_info(mci, &discard);
 941
 942         /* get this far and it's successful */
 943         debugf3("%s(): success\n", __func__);
 944         return 0;
 945
 946 fail:
 947         if (mci) {
 948                 if (pvt->dev_d0f0)
 949                         pci_dev_put(pvt->dev_d0f0);
 950                 if (pvt->dev_d0f1)
 951                         pci_dev_put(pvt->dev_d0f1);
 952                 if (pvt->bridge_ck)
 953                         pci_dev_put(pvt->bridge_ck);
 954                 edac_mc_free(mci);
 955         }
 956         return rc;
 957 }
 958
 959 /* returns count (>= 0), or negative on error */
 960 static int __devinit e752x_init_one(struct pci_dev *pdev,
 961                                     const struct pci_device_id *ent)
 962 {
 963         debugf0("%s()\n", __func__);
 964
 965         /* wake up and enable device */
 966         if(pci_enable_device(pdev) < 0)
 967                 return -EIO;
 968         return e752x_probe1(pdev, ent->driver_data);
 969 }
 970
 971
 972 static void __devexit e752x_remove_one(struct pci_dev *pdev)
 973 {
 974         struct mem_ctl_info *mci;
 975         struct e752x_pvt *pvt;
 976
 977         debugf0("%s()\n", __func__);
 978
 979         if ((mci = edac_mc_del_mc(pdev)) == NULL)
 980                 return;
 981
 982         pvt = (struct e752x_pvt *) mci->pvt_info;
 983         pci_dev_put(pvt->dev_d0f0);
 984         pci_dev_put(pvt->dev_d0f1);
 985         pci_dev_put(pvt->bridge_ck);
 986         edac_mc_free(mci);
 987 }
 988
 989
 990 static const struct pci_device_id e752x_pci_tbl[] __devinitdata = {
 991         {PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 992          E7520},
 993         {PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 994          E7525},
 995         {PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 996          E7320},
 997         {0,}                    /* 0 terminated list. */
 998 };
 999
1000 MODULE_DEVICE_TABLE(pci, e752x_pci_tbl);
1001
1002
1003 static struct pci_driver e752x_driver = {
1004         .name = EDAC_MOD_STR,
1005         .probe = e752x_init_one,
1006         .remove = __devexit_p(e752x_remove_one),
1007         .id_table = e752x_pci_tbl,
1008 };
1009
1010
1011 static int __init e752x_init(void)
1012 {
1013         int pci_rc;
1014
1015         debugf3("%s()\n", __func__);
1016         pci_rc = pci_register_driver(&e752x_driver);
1017         return (pci_rc < 0) ? pci_rc : 0;
1018 }
1019
1020
1021 static void __exit e752x_exit(void)
1022 {
1023         debugf3("%s()\n", __func__);
1024         pci_unregister_driver(&e752x_driver);
1025 }
1026
1027
1028 module_init(e752x_init);
1029 module_exit(e752x_exit);
1030
1031 MODULE_LICENSE("GPL");
1032 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n");
1033 MODULE_DESCRIPTION("MC support for Intel e752x memory controllers");