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  * Implement support for the e7520, E7525, e7320 and i3100 memory controllers.
   8  *
   9  * Datasheets:
  10  *      http://www.intel.in/content/www/in/en/chipsets/e7525-memory-controller-hub-datasheet.html
  11  *      ftp://download.intel.com/design/intarch/datashts/31345803.pdf
  12  *
  13  * Written by Tom Zimmerman
  14  *
  15  * Contributors:
  16  *      Thayne Harbaugh at realmsys.com (?)
  17  *      Wang Zhenyu at intel.com
  18  *      Dave Jiang at mvista.com
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/pci_ids.h>
  26 #include <linux/edac.h>
  27 #include "edac_module.h"
  28
  29 #define EDAC_MOD_STR    "e752x_edac"
  30
  31 static int report_non_memory_errors;
  32 static int force_function_unhide;
  33 static int sysbus_parity = -1;
  34
  35 static struct edac_pci_ctl_info *e752x_pci;
  36
  37 #define e752x_printk(level, fmt, arg...) \
  38         edac_printk(level, "e752x", fmt, ##arg)
  39
  40 #define e752x_mc_printk(mci, level, fmt, arg...) \
  41         edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg)
  42
  43 #ifndef PCI_DEVICE_ID_INTEL_7520_0
  44 #define PCI_DEVICE_ID_INTEL_7520_0      0x3590
  45 #endif                          /* PCI_DEVICE_ID_INTEL_7520_0      */
  46
  47 #ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR
  48 #define PCI_DEVICE_ID_INTEL_7520_1_ERR  0x3591
  49 #endif                          /* PCI_DEVICE_ID_INTEL_7520_1_ERR  */
  50
  51 #ifndef PCI_DEVICE_ID_INTEL_7525_0
  52 #define PCI_DEVICE_ID_INTEL_7525_0      0x359E
  53 #endif                          /* PCI_DEVICE_ID_INTEL_7525_0      */
  54
  55 #ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR
  56 #define PCI_DEVICE_ID_INTEL_7525_1_ERR  0x3593
  57 #endif                          /* PCI_DEVICE_ID_INTEL_7525_1_ERR  */
  58
  59 #ifndef PCI_DEVICE_ID_INTEL_7320_0
  60 #define PCI_DEVICE_ID_INTEL_7320_0      0x3592
  61 #endif                          /* PCI_DEVICE_ID_INTEL_7320_0 */
  62
  63 #ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR
  64 #define PCI_DEVICE_ID_INTEL_7320_1_ERR  0x3593
  65 #endif                          /* PCI_DEVICE_ID_INTEL_7320_1_ERR */
  66
  67 #ifndef PCI_DEVICE_ID_INTEL_3100_0
  68 #define PCI_DEVICE_ID_INTEL_3100_0      0x35B0
  69 #endif                          /* PCI_DEVICE_ID_INTEL_3100_0 */
  70
  71 #ifndef PCI_DEVICE_ID_INTEL_3100_1_ERR
  72 #define PCI_DEVICE_ID_INTEL_3100_1_ERR  0x35B1
  73 #endif                          /* PCI_DEVICE_ID_INTEL_3100_1_ERR */
  74
  75 #define E752X_NR_CSROWS         8       /* number of csrows */
  76
  77 /* E752X register addresses - device 0 function 0 */
  78 #define E752X_MCHSCRB           0x52    /* Memory Scrub register (16b) */
  79                                         /*
  80                                          * 6:5     Scrub Completion Count
  81                                          * 3:2     Scrub Rate (i3100 only)
  82                                          *      01=fast 10=normal
  83                                          * 1:0     Scrub Mode enable
  84                                          *      00=off 10=on
  85                                          */
  86 #define E752X_DRB               0x60    /* DRAM row boundary register (8b) */
  87 #define E752X_DRA               0x70    /* DRAM row attribute register (8b) */
  88                                         /*
  89                                          * 31:30   Device width row 7
  90                                          *      01=x8 10=x4 11=x8 DDR2
  91                                          * 27:26   Device width row 6
  92                                          * 23:22   Device width row 5
  93                                          * 19:20   Device width row 4
  94                                          * 15:14   Device width row 3
  95                                          * 11:10   Device width row 2
  96                                          *  7:6    Device width row 1
  97                                          *  3:2    Device width row 0
  98                                          */
  99 #define E752X_DRC               0x7C    /* DRAM controller mode reg (32b) */
 100                                         /* FIXME:IS THIS RIGHT? */
 101                                         /*
 102                                          * 22    Number channels 0=1,1=2
 103                                          * 19:18 DRB Granularity 32/64MB
 104                                          */
 105 #define E752X_DRM               0x80    /* Dimm mapping register */
 106 #define E752X_DDRCSR            0x9A    /* DDR control and status reg (16b) */
 107                                         /*
 108                                          * 14:12 1 single A, 2 single B, 3 dual
 109                                          */
 110 #define E752X_TOLM              0xC4    /* DRAM top of low memory reg (16b) */
 111 #define E752X_REMAPBASE         0xC6    /* DRAM remap base address reg (16b) */
 112 #define E752X_REMAPLIMIT        0xC8    /* DRAM remap limit address reg (16b) */
 113 #define E752X_REMAPOFFSET       0xCA    /* DRAM remap limit offset reg (16b) */
 114
 115 /* E752X register addresses - device 0 function 1 */
 116 #define E752X_FERR_GLOBAL       0x40    /* Global first error register (32b) */
 117 #define E752X_NERR_GLOBAL       0x44    /* Global next error register (32b) */
 118 #define E752X_HI_FERR           0x50    /* Hub interface first error reg (8b) */
 119 #define E752X_HI_NERR           0x52    /* Hub interface next error reg (8b) */
 120 #define E752X_HI_ERRMASK        0x54    /* Hub interface error mask reg (8b) */
 121 #define E752X_HI_SMICMD         0x5A    /* Hub interface SMI command reg (8b) */
 122 #define E752X_SYSBUS_FERR       0x60    /* System buss first error reg (16b) */
 123 #define E752X_SYSBUS_NERR       0x62    /* System buss next error reg (16b) */
 124 #define E752X_SYSBUS_ERRMASK    0x64    /* System buss error mask reg (16b) */
 125 #define E752X_SYSBUS_SMICMD     0x6A    /* System buss SMI command reg (16b) */
 126 #define E752X_BUF_FERR          0x70    /* Memory buffer first error reg (8b) */
 127 #define E752X_BUF_NERR          0x72    /* Memory buffer next error reg (8b) */
 128 #define E752X_BUF_ERRMASK       0x74    /* Memory buffer error mask reg (8b) */
 129 #define E752X_BUF_SMICMD        0x7A    /* Memory buffer SMI cmd reg (8b) */
 130 #define E752X_DRAM_FERR         0x80    /* DRAM first error register (16b) */
 131 #define E752X_DRAM_NERR         0x82    /* DRAM next error register (16b) */
 132 #define E752X_DRAM_ERRMASK      0x84    /* DRAM error mask register (8b) */
 133 #define E752X_DRAM_SMICMD       0x8A    /* DRAM SMI command register (8b) */
 134 #define E752X_DRAM_RETR_ADD     0xAC    /* DRAM Retry address register (32b) */
 135 #define E752X_DRAM_SEC1_ADD     0xA0    /* DRAM first correctable memory */
 136                                         /*     error address register (32b) */
 137                                         /*
 138                                          * 31    Reserved
 139                                          * 30:2  CE address (64 byte block 34:6
 140                                          * 1     Reserved
 141                                          * 0     HiLoCS
 142                                          */
 143 #define E752X_DRAM_SEC2_ADD     0xC8    /* DRAM first correctable memory */
 144                                         /*     error address register (32b) */
 145                                         /*
 146                                          * 31    Reserved
 147                                          * 30:2  CE address (64 byte block 34:6)
 148                                          * 1     Reserved
 149                                          * 0     HiLoCS
 150                                          */
 151 #define E752X_DRAM_DED_ADD      0xA4    /* DRAM first uncorrectable memory */
 152                                         /*     error address register (32b) */
 153                                         /*
 154                                          * 31    Reserved
 155                                          * 30:2  CE address (64 byte block 34:6)
 156                                          * 1     Reserved
 157                                          * 0     HiLoCS
 158                                          */
 159 #define E752X_DRAM_SCRB_ADD     0xA8    /* DRAM 1st uncorrectable scrub mem */
 160                                         /*     error address register (32b) */
 161                                         /*
 162                                          * 31    Reserved
 163                                          * 30:2  CE address (64 byte block 34:6
 164                                          * 1     Reserved
 165                                          * 0     HiLoCS
 166                                          */
 167 #define E752X_DRAM_SEC1_SYNDROME 0xC4   /* DRAM first correctable memory */
 168                                         /*     error syndrome register (16b) */
 169 #define E752X_DRAM_SEC2_SYNDROME 0xC6   /* DRAM second correctable memory */
 170                                         /*     error syndrome register (16b) */
 171 #define E752X_DEVPRES1          0xF4    /* Device Present 1 register (8b) */
 172
 173 /* 3100 IMCH specific register addresses - device 0 function 1 */
 174 #define I3100_NSI_FERR          0x48    /* NSI first error reg (32b) */
 175 #define I3100_NSI_NERR          0x4C    /* NSI next error reg (32b) */
 176 #define I3100_NSI_SMICMD        0x54    /* NSI SMI command register (32b) */
 177 #define I3100_NSI_EMASK         0x90    /* NSI error mask register (32b) */
 178
 179 /* ICH5R register addresses - device 30 function 0 */
 180 #define ICH5R_PCI_STAT          0x06    /* PCI status register (16b) */
 181 #define ICH5R_PCI_2ND_STAT      0x1E    /* PCI status secondary reg (16b) */
 182 #define ICH5R_PCI_BRIDGE_CTL    0x3E    /* PCI bridge control register (16b) */
 183
 184 enum e752x_chips {
 185         E7520 = 0,
 186         E7525 = 1,
 187         E7320 = 2,
 188         I3100 = 3
 189 };
 190
 191 /*
 192  * Those chips Support single-rank and dual-rank memories only.
 193  *
 194  * On e752x chips, the odd rows are present only on dual-rank memories.
 195  * Dividing the rank by two will provide the dimm#
 196  *
 197  * i3100 MC has a different mapping: it supports only 4 ranks.
 198  *
 199  * The mapping is (from 1 to n):
 200  *      slot       single-ranked        double-ranked
 201  *      dimm #1 -> rank #4              NA
 202  *      dimm #2 -> rank #3              NA
 203  *      dimm #3 -> rank #2              Ranks 2 and 3
 204  *      dimm #4 -> rank $1              Ranks 1 and 4
 205  *
 206  * FIXME: The current mapping for i3100 considers that it supports up to 8
 207  *        ranks/chanel, but datasheet says that the MC supports only 4 ranks.
 208  */
 209
 210 struct e752x_pvt {
 211         struct pci_dev *dev_d0f0;
 212         struct pci_dev *dev_d0f1;
 213         u32 tolm;
 214         u32 remapbase;
 215         u32 remaplimit;
 216         int mc_symmetric;
 217         u8 map[8];
 218         int map_type;
 219         const struct e752x_dev_info *dev_info;
 220 };
 221
 222 struct e752x_dev_info {
 223         u16 err_dev;
 224         u16 ctl_dev;
 225         const char *ctl_name;
 226 };
 227
 228 struct e752x_error_info {
 229         u32 ferr_global;
 230         u32 nerr_global;
 231         u32 nsi_ferr;   /* 3100 only */
 232         u32 nsi_nerr;   /* 3100 only */
 233         u8 hi_ferr;     /* all but 3100 */
 234         u8 hi_nerr;     /* all but 3100 */
 235         u16 sysbus_ferr;
 236         u16 sysbus_nerr;
 237         u8 buf_ferr;
 238         u8 buf_nerr;
 239         u16 dram_ferr;
 240         u16 dram_nerr;
 241         u32 dram_sec1_add;
 242         u32 dram_sec2_add;
 243         u16 dram_sec1_syndrome;
 244         u16 dram_sec2_syndrome;
 245         u32 dram_ded_add;
 246         u32 dram_scrb_add;
 247         u32 dram_retr_add;
 248 };
 249
 250 static const struct e752x_dev_info e752x_devs[] = {
 251         [E7520] = {
 252                 .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR,
 253                 .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0,
 254                 .ctl_name = "E7520"},
 255         [E7525] = {
 256                 .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
 257                 .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0,
 258                 .ctl_name = "E7525"},
 259         [E7320] = {
 260                 .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
 261                 .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0,
 262                 .ctl_name = "E7320"},
 263         [I3100] = {
 264                 .err_dev = PCI_DEVICE_ID_INTEL_3100_1_ERR,
 265                 .ctl_dev = PCI_DEVICE_ID_INTEL_3100_0,
 266                 .ctl_name = "3100"},
 267 };
 268
 269 /* Valid scrub rates for the e752x/3100 hardware memory scrubber. We
 270  * map the scrubbing bandwidth to a hardware register value. The 'set'
 271  * operation finds the 'matching or higher value'.  Note that scrubbing
 272  * on the e752x can only be enabled/disabled.  The 3100 supports
 273  * a normal and fast mode.
 274  */
 275
 276 #define SDRATE_EOT 0xFFFFFFFF
 277
 278 struct scrubrate {
 279         u32 bandwidth;  /* bandwidth consumed by scrubbing in bytes/sec */
 280         u16 scrubval;   /* register value for scrub rate */
 281 };
 282
 283 /* Rate below assumes same performance as i3100 using PC3200 DDR2 in
 284  * normal mode.  e752x bridges don't support choosing normal or fast mode,
 285  * so the scrubbing bandwidth value isn't all that important - scrubbing is
 286  * either on or off.
 287  */
 288 static const struct scrubrate scrubrates_e752x[] = {
 289         {0,             0x00},  /* Scrubbing Off */
 290         {500000,        0x02},  /* Scrubbing On */
 291         {SDRATE_EOT,    0x00}   /* End of Table */
 292 };
 293
 294 /* Fast mode: 2 GByte PC3200 DDR2 scrubbed in 33s = 63161283 bytes/s
 295  * Normal mode: 125 (32000 / 256) times slower than fast mode.
 296  */
 297 static const struct scrubrate scrubrates_i3100[] = {
 298         {0,             0x00},  /* Scrubbing Off */
 299         {500000,        0x0a},  /* Normal mode - 32k clocks */
 300         {62500000,      0x06},  /* Fast mode - 256 clocks */
 301         {SDRATE_EOT,    0x00}   /* End of Table */
 302 };
 303
 304 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
 305                                 unsigned long page)
 306 {
 307         u32 remap;
 308         struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
 309
 310         edac_dbg(3, "\n");
 311
 312         if (page < pvt->tolm)
 313                 return page;
 314
 315         if ((page >= 0x100000) && (page < pvt->remapbase))
 316                 return page;
 317
 318         remap = (page - pvt->tolm) + pvt->remapbase;
 319
 320         if (remap < pvt->remaplimit)
 321                 return remap;
 322
 323         e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
 324         return pvt->tolm - 1;
 325 }
 326
 327 static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
 328                         u32 sec1_add, u16 sec1_syndrome)
 329 {
 330         u32 page;
 331         int row;
 332         int channel;
 333         int i;
 334         struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
 335
 336         edac_dbg(3, "\n");
 337
 338         /* convert the addr to 4k page */
 339         page = sec1_add >> (PAGE_SHIFT - 4);
 340
 341         /* FIXME - check for -1 */
 342         if (pvt->mc_symmetric) {
 343                 /* chip select are bits 14 & 13 */
 344                 row = ((page >> 1) & 3);
 345                 e752x_printk(KERN_WARNING,
 346                         "Test row %d Table %d %d %d %d %d %d %d %d\n", row,
 347                         pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3],
 348                         pvt->map[4], pvt->map[5], pvt->map[6],
 349                         pvt->map[7]);
 350
 351                 /* test for channel remapping */
 352                 for (i = 0; i < 8; i++) {
 353                         if (pvt->map[i] == row)
 354                                 break;
 355                 }
 356
 357                 e752x_printk(KERN_WARNING, "Test computed row %d\n", i);
 358
 359                 if (i < 8)
 360                         row = i;
 361                 else
 362                         e752x_mc_printk(mci, KERN_WARNING,
 363                                         "row %d not found in remap table\n",
 364                                         row);
 365         } else
 366                 row = edac_mc_find_csrow_by_page(mci, page);
 367
 368         /* 0 = channel A, 1 = channel B */
 369         channel = !(error_one & 1);
 370
 371         /* e752x mc reads 34:6 of the DRAM linear address */
 372         edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
 373                              page, offset_in_page(sec1_add << 4), sec1_syndrome,
 374                              row, channel, -1,
 375                              "e752x CE", "");
 376 }
 377
 378 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
 379                         u32 sec1_add, u16 sec1_syndrome, int *error_found,
 380                         int handle_error)
 381 {
 382         *error_found = 1;
 383
 384         if (handle_error)
 385                 do_process_ce(mci, error_one, sec1_add, sec1_syndrome);
 386 }
 387
 388 static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
 389                         u32 ded_add, u32 scrb_add)
 390 {
 391         u32 error_2b, block_page;
 392         int row;
 393         struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
 394
 395         edac_dbg(3, "\n");
 396
 397         if (error_one & 0x0202) {
 398                 error_2b = ded_add;
 399
 400                 /* convert to 4k address */
 401                 block_page = error_2b >> (PAGE_SHIFT - 4);
 402
 403                 row = pvt->mc_symmetric ?
 404                 /* chip select are bits 14 & 13 */
 405                         ((block_page >> 1) & 3) :
 406                         edac_mc_find_csrow_by_page(mci, block_page);
 407
 408                 /* e752x mc reads 34:6 of the DRAM linear address */
 409                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
 410                                         block_page,
 411                                         offset_in_page(error_2b << 4), 0,
 412                                          row, -1, -1,
 413                                         "e752x UE from Read", "");
 414
 415         }
 416         if (error_one & 0x0404) {
 417                 error_2b = scrb_add;
 418
 419                 /* convert to 4k address */
 420                 block_page = error_2b >> (PAGE_SHIFT - 4);
 421
 422                 row = pvt->mc_symmetric ?
 423                 /* chip select are bits 14 & 13 */
 424                         ((block_page >> 1) & 3) :
 425                         edac_mc_find_csrow_by_page(mci, block_page);
 426
 427                 /* e752x mc reads 34:6 of the DRAM linear address */
 428                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
 429                                         block_page,
 430                                         offset_in_page(error_2b << 4), 0,
 431                                         row, -1, -1,
 432                                         "e752x UE from Scruber", "");
 433         }
 434 }
 435
 436 static inline void process_ue(struct mem_ctl_info *mci, u16 error_one,
 437                         u32 ded_add, u32 scrb_add, int *error_found,
 438                         int handle_error)
 439 {
 440         *error_found = 1;
 441
 442         if (handle_error)
 443                 do_process_ue(mci, error_one, ded_add, scrb_add);
 444 }
 445
 446 static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
 447                                          int *error_found, int handle_error)
 448 {
 449         *error_found = 1;
 450
 451         if (!handle_error)
 452                 return;
 453
 454         edac_dbg(3, "\n");
 455         edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
 456                              -1, -1, -1,
 457                              "e752x UE log memory write", "");
 458 }
 459
 460 static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
 461                                  u32 retry_add)
 462 {
 463         u32 error_1b, page;
 464         int row;
 465         struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
 466
 467         error_1b = retry_add;
 468         page = error_1b >> (PAGE_SHIFT - 4);  /* convert the addr to 4k page */
 469
 470         /* chip select are bits 14 & 13 */
 471         row = pvt->mc_symmetric ? ((page >> 1) & 3) :
 472                 edac_mc_find_csrow_by_page(mci, page);
 473
 474         e752x_mc_printk(mci, KERN_WARNING,
 475                         "CE page 0x%lx, row %d : Memory read retry\n",
 476                         (long unsigned int)page, row);
 477 }
 478
 479 static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error,
 480                                 u32 retry_add, int *error_found,
 481                                 int handle_error)
 482 {
 483         *error_found = 1;
 484
 485         if (handle_error)
 486                 do_process_ded_retry(mci, error, retry_add);
 487 }
 488
 489 static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error,
 490                                         int *error_found, int handle_error)
 491 {
 492         *error_found = 1;
 493
 494         if (handle_error)
 495                 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n");
 496 }
 497
 498 static char *global_message[11] = {
 499         "PCI Express C1",
 500         "PCI Express C",
 501         "PCI Express B1",
 502         "PCI Express B",
 503         "PCI Express A1",
 504         "PCI Express A",
 505         "DMA Controller",
 506         "HUB or NS Interface",
 507         "System Bus",
 508         "DRAM Controller",  /* 9th entry */
 509         "Internal Buffer"
 510 };
 511
 512 #define DRAM_ENTRY      9
 513
 514 static char *fatal_message[2] = { "Non-Fatal ", "Fatal " };
 515
 516 static void do_global_error(int fatal, u32 errors)
 517 {
 518         int i;
 519
 520         for (i = 0; i < 11; i++) {
 521                 if (errors & (1 << i)) {
 522                         /* If the error is from DRAM Controller OR
 523                          * we are to report ALL errors, then
 524                          * report the error
 525                          */
 526                         if ((i == DRAM_ENTRY) || report_non_memory_errors)
 527                                 e752x_printk(KERN_WARNING, "%sError %s\n",
 528                                         fatal_message[fatal],
 529                                         global_message[i]);
 530                 }
 531         }
 532 }
 533
 534 static inline void global_error(int fatal, u32 errors, int *error_found,
 535                                 int handle_error)
 536 {
 537         *error_found = 1;
 538
 539         if (handle_error)
 540                 do_global_error(fatal, errors);
 541 }
 542
 543 static char *hub_message[7] = {
 544         "HI Address or Command Parity", "HI Illegal Access",
 545         "HI Internal Parity", "Out of Range Access",
 546         "HI Data Parity", "Enhanced Config Access",
 547         "Hub Interface Target Abort"
 548 };
 549
 550 static void do_hub_error(int fatal, u8 errors)
 551 {
 552         int i;
 553
 554         for (i = 0; i < 7; i++) {
 555                 if (errors & (1 << i))
 556                         e752x_printk(KERN_WARNING, "%sError %s\n",
 557                                 fatal_message[fatal], hub_message[i]);
 558         }
 559 }
 560
 561 static inline void hub_error(int fatal, u8 errors, int *error_found,
 562                         int handle_error)
 563 {
 564         *error_found = 1;
 565
 566         if (handle_error)
 567                 do_hub_error(fatal, errors);
 568 }
 569
 570 #define NSI_FATAL_MASK          0x0c080081
 571 #define NSI_NON_FATAL_MASK      0x23a0ba64
 572 #define NSI_ERR_MASK            (NSI_FATAL_MASK | NSI_NON_FATAL_MASK)
 573
 574 static char *nsi_message[30] = {
 575         "NSI Link Down",        /* NSI_FERR/NSI_NERR bit 0, fatal error */
 576         "",                                             /* reserved */
 577         "NSI Parity Error",                             /* bit 2, non-fatal */
 578         "",                                             /* reserved */
 579         "",                                             /* reserved */
 580         "Correctable Error Message",                    /* bit 5, non-fatal */
 581         "Non-Fatal Error Message",                      /* bit 6, non-fatal */
 582         "Fatal Error Message",                          /* bit 7, fatal */
 583         "",                                             /* reserved */
 584         "Receiver Error",                               /* bit 9, non-fatal */
 585         "",                                             /* reserved */
 586         "Bad TLP",                                      /* bit 11, non-fatal */
 587         "Bad DLLP",                                     /* bit 12, non-fatal */
 588         "REPLAY_NUM Rollover",                          /* bit 13, non-fatal */
 589         "",                                             /* reserved */
 590         "Replay Timer Timeout",                         /* bit 15, non-fatal */
 591         "",                                             /* reserved */
 592         "",                                             /* reserved */
 593         "",                                             /* reserved */
 594         "Data Link Protocol Error",                     /* bit 19, fatal */
 595         "",                                             /* reserved */
 596         "Poisoned TLP",                                 /* bit 21, non-fatal */
 597         "",                                             /* reserved */
 598         "Completion Timeout",                           /* bit 23, non-fatal */
 599         "Completer Abort",                              /* bit 24, non-fatal */
 600         "Unexpected Completion",                        /* bit 25, non-fatal */
 601         "Receiver Overflow",                            /* bit 26, fatal */
 602         "Malformed TLP",                                /* bit 27, fatal */
 603         "",                                             /* reserved */
 604         "Unsupported Request"                           /* bit 29, non-fatal */
 605 };
 606
 607 static void do_nsi_error(int fatal, u32 errors)
 608 {
 609         int i;
 610
 611         for (i = 0; i < 30; i++) {
 612                 if (errors & (1 << i))
 613                         printk(KERN_WARNING "%sError %s\n",
 614                                fatal_message[fatal], nsi_message[i]);
 615         }
 616 }
 617
 618 static inline void nsi_error(int fatal, u32 errors, int *error_found,
 619                 int handle_error)
 620 {
 621         *error_found = 1;
 622
 623         if (handle_error)
 624                 do_nsi_error(fatal, errors);
 625 }
 626
 627 static char *membuf_message[4] = {
 628         "Internal PMWB to DRAM parity",
 629         "Internal PMWB to System Bus Parity",
 630         "Internal System Bus or IO to PMWB Parity",
 631         "Internal DRAM to PMWB Parity"
 632 };
 633
 634 static void do_membuf_error(u8 errors)
 635 {
 636         int i;
 637
 638         for (i = 0; i < 4; i++) {
 639                 if (errors & (1 << i))
 640                         e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n",
 641                                 membuf_message[i]);
 642         }
 643 }
 644
 645 static inline void membuf_error(u8 errors, int *error_found, int handle_error)
 646 {
 647         *error_found = 1;
 648
 649         if (handle_error)
 650                 do_membuf_error(errors);
 651 }
 652
 653 static char *sysbus_message[10] = {
 654         "Addr or Request Parity",
 655         "Data Strobe Glitch",
 656         "Addr Strobe Glitch",
 657         "Data Parity",
 658         "Addr Above TOM",
 659         "Non DRAM Lock Error",
 660         "MCERR", "BINIT",
 661         "Memory Parity",
 662         "IO Subsystem Parity"
 663 };
 664
 665 static void do_sysbus_error(int fatal, u32 errors)
 666 {
 667         int i;
 668
 669         for (i = 0; i < 10; i++) {
 670                 if (errors & (1 << i))
 671                         e752x_printk(KERN_WARNING, "%sError System Bus %s\n",
 672                                 fatal_message[fatal], sysbus_message[i]);
 673         }
 674 }
 675
 676 static inline void sysbus_error(int fatal, u32 errors, int *error_found,
 677                                 int handle_error)
 678 {
 679         *error_found = 1;
 680
 681         if (handle_error)
 682                 do_sysbus_error(fatal, errors);
 683 }
 684
 685 static void e752x_check_hub_interface(struct e752x_error_info *info,
 686                                 int *error_found, int handle_error)
 687 {
 688         u8 stat8;
 689
 690         //pci_read_config_byte(dev,E752X_HI_FERR,&stat8);
 691
 692         stat8 = info->hi_ferr;
 693
 694         if (stat8 & 0x7f) {     /* Error, so process */
 695                 stat8 &= 0x7f;
 696
 697                 if (stat8 & 0x2b)
 698                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 699
 700                 if (stat8 & 0x54)
 701                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 702         }
 703         //pci_read_config_byte(dev,E752X_HI_NERR,&stat8);
 704
 705         stat8 = info->hi_nerr;
 706
 707         if (stat8 & 0x7f) {     /* Error, so process */
 708                 stat8 &= 0x7f;
 709
 710                 if (stat8 & 0x2b)
 711                         hub_error(1, stat8 & 0x2b, error_found, handle_error);
 712
 713                 if (stat8 & 0x54)
 714                         hub_error(0, stat8 & 0x54, error_found, handle_error);
 715         }
 716 }
 717
 718 static void e752x_check_ns_interface(struct e752x_error_info *info,
 719                                 int *error_found, int handle_error)
 720 {
 721         u32 stat32;
 722
 723         stat32 = info->nsi_ferr;
 724         if (stat32 & NSI_ERR_MASK) { /* Error, so process */
 725                 if (stat32 & NSI_FATAL_MASK)    /* check for fatal errors */
 726                         nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
 727                                   handle_error);
 728                 if (stat32 & NSI_NON_FATAL_MASK) /* check for non-fatal ones */
 729                         nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
 730                                   handle_error);
 731         }
 732         stat32 = info->nsi_nerr;
 733         if (stat32 & NSI_ERR_MASK) {
 734                 if (stat32 & NSI_FATAL_MASK)
 735                         nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
 736                                   handle_error);
 737                 if (stat32 & NSI_NON_FATAL_MASK)
 738                         nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
 739                                   handle_error);
 740         }
 741 }
 742
 743 static void e752x_check_sysbus(struct e752x_error_info *info,
 744                         int *error_found, int handle_error)
 745 {
 746         u32 stat32, error32;
 747
 748         //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32);
 749         stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16);
 750
 751         if (stat32 == 0)
 752                 return;         /* no errors */
 753
 754         error32 = (stat32 >> 16) & 0x3ff;
 755         stat32 = stat32 & 0x3ff;
 756
 757         if (stat32 & 0x087)
 758                 sysbus_error(1, stat32 & 0x087, error_found, handle_error);
 759
 760         if (stat32 & 0x378)
 761                 sysbus_error(0, stat32 & 0x378, error_found, handle_error);
 762
 763         if (error32 & 0x087)
 764                 sysbus_error(1, error32 & 0x087, error_found, handle_error);
 765
 766         if (error32 & 0x378)
 767                 sysbus_error(0, error32 & 0x378, error_found, handle_error);
 768 }
 769
 770 static void e752x_check_membuf(struct e752x_error_info *info,
 771                         int *error_found, int handle_error)
 772 {
 773         u8 stat8;
 774
 775         stat8 = info->buf_ferr;
 776
 777         if (stat8 & 0x0f) {     /* Error, so process */
 778                 stat8 &= 0x0f;
 779                 membuf_error(stat8, error_found, handle_error);
 780         }
 781
 782         stat8 = info->buf_nerr;
 783
 784         if (stat8 & 0x0f) {     /* Error, so process */
 785                 stat8 &= 0x0f;
 786                 membuf_error(stat8, error_found, handle_error);
 787         }
 788 }
 789
 790 static void e752x_check_dram(struct mem_ctl_info *mci,
 791                         struct e752x_error_info *info, int *error_found,
 792                         int handle_error)
 793 {
 794         u16 error_one, error_next;
 795
 796         error_one = info->dram_ferr;
 797         error_next = info->dram_nerr;
 798
 799         /* decode and report errors */
 800         if (error_one & 0x0101) /* check first error correctable */
 801                 process_ce(mci, error_one, info->dram_sec1_add,
 802                         info->dram_sec1_syndrome, error_found, handle_error);
 803
 804         if (error_next & 0x0101)        /* check next error correctable */
 805                 process_ce(mci, error_next, info->dram_sec2_add,
 806                         info->dram_sec2_syndrome, error_found, handle_error);
 807
 808         if (error_one & 0x4040)
 809                 process_ue_no_info_wr(mci, error_found, handle_error);
 810
 811         if (error_next & 0x4040)
 812                 process_ue_no_info_wr(mci, error_found, handle_error);
 813
 814         if (error_one & 0x2020)
 815                 process_ded_retry(mci, error_one, info->dram_retr_add,
 816                                 error_found, handle_error);
 817
 818         if (error_next & 0x2020)
 819                 process_ded_retry(mci, error_next, info->dram_retr_add,
 820                                 error_found, handle_error);
 821
 822         if (error_one & 0x0808)
 823                 process_threshold_ce(mci, error_one, error_found, handle_error);
 824
 825         if (error_next & 0x0808)
 826                 process_threshold_ce(mci, error_next, error_found,
 827                                 handle_error);
 828
 829         if (error_one & 0x0606)
 830                 process_ue(mci, error_one, info->dram_ded_add,
 831                         info->dram_scrb_add, error_found, handle_error);
 832
 833         if (error_next & 0x0606)
 834                 process_ue(mci, error_next, info->dram_ded_add,
 835                         info->dram_scrb_add, error_found, handle_error);
 836 }
 837
 838 static void e752x_get_error_info(struct mem_ctl_info *mci,
 839                                  struct e752x_error_info *info)
 840 {
 841         struct pci_dev *dev;
 842         struct e752x_pvt *pvt;
 843
 844         memset(info, 0, sizeof(*info));
 845         pvt = (struct e752x_pvt *)mci->pvt_info;
 846         dev = pvt->dev_d0f1;
 847         pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global);
 848
 849         if (info->ferr_global) {
 850                 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
 851                         pci_read_config_dword(dev, I3100_NSI_FERR,
 852                                              &info->nsi_ferr);
 853                         info->hi_ferr = 0;
 854                 } else {
 855                         pci_read_config_byte(dev, E752X_HI_FERR,
 856                                              &info->hi_ferr);
 857                         info->nsi_ferr = 0;
 858                 }
 859                 pci_read_config_word(dev, E752X_SYSBUS_FERR,
 860                                 &info->sysbus_ferr);
 861                 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr);
 862                 pci_read_config_word(dev, E752X_DRAM_FERR, &info->dram_ferr);
 863                 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD,
 864                                 &info->dram_sec1_add);
 865                 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME,
 866                                 &info->dram_sec1_syndrome);
 867                 pci_read_config_dword(dev, E752X_DRAM_DED_ADD,
 868                                 &info->dram_ded_add);
 869                 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD,
 870                                 &info->dram_scrb_add);
 871                 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD,
 872                                 &info->dram_retr_add);
 873
 874                 /* ignore the reserved bits just in case */
 875                 if (info->hi_ferr & 0x7f)
 876                         pci_write_config_byte(dev, E752X_HI_FERR,
 877                                         info->hi_ferr);
 878
 879                 if (info->nsi_ferr & NSI_ERR_MASK)
 880                         pci_write_config_dword(dev, I3100_NSI_FERR,
 881                                         info->nsi_ferr);
 882
 883                 if (info->sysbus_ferr)
 884                         pci_write_config_word(dev, E752X_SYSBUS_FERR,
 885                                         info->sysbus_ferr);
 886
 887                 if (info->buf_ferr & 0x0f)
 888                         pci_write_config_byte(dev, E752X_BUF_FERR,
 889                                         info->buf_ferr);
 890
 891                 if (info->dram_ferr)
 892                         pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_FERR,
 893                                          info->dram_ferr, info->dram_ferr);
 894
 895                 pci_write_config_dword(dev, E752X_FERR_GLOBAL,
 896                                 info->ferr_global);
 897         }
 898
 899         pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global);
 900
 901         if (info->nerr_global) {
 902                 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
 903                         pci_read_config_dword(dev, I3100_NSI_NERR,
 904                                              &info->nsi_nerr);
 905                         info->hi_nerr = 0;
 906                 } else {
 907                         pci_read_config_byte(dev, E752X_HI_NERR,
 908                                              &info->hi_nerr);
 909                         info->nsi_nerr = 0;
 910                 }
 911                 pci_read_config_word(dev, E752X_SYSBUS_NERR,
 912                                 &info->sysbus_nerr);
 913                 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr);
 914                 pci_read_config_word(dev, E752X_DRAM_NERR, &info->dram_nerr);
 915                 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD,
 916                                 &info->dram_sec2_add);
 917                 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME,
 918                                 &info->dram_sec2_syndrome);
 919
 920                 if (info->hi_nerr & 0x7f)
 921                         pci_write_config_byte(dev, E752X_HI_NERR,
 922                                         info->hi_nerr);
 923
 924                 if (info->nsi_nerr & NSI_ERR_MASK)
 925                         pci_write_config_dword(dev, I3100_NSI_NERR,
 926                                         info->nsi_nerr);
 927
 928                 if (info->sysbus_nerr)
 929                         pci_write_config_word(dev, E752X_SYSBUS_NERR,
 930                                         info->sysbus_nerr);
 931
 932                 if (info->buf_nerr & 0x0f)
 933                         pci_write_config_byte(dev, E752X_BUF_NERR,
 934                                         info->buf_nerr);
 935
 936                 if (info->dram_nerr)
 937                         pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_NERR,
 938                                          info->dram_nerr, info->dram_nerr);
 939
 940                 pci_write_config_dword(dev, E752X_NERR_GLOBAL,
 941                                 info->nerr_global);
 942         }
 943 }
 944
 945 static int e752x_process_error_info(struct mem_ctl_info *mci,
 946                                 struct e752x_error_info *info,
 947                                 int handle_errors)
 948 {
 949         u32 error32, stat32;
 950         int error_found;
 951
 952         error_found = 0;
 953         error32 = (info->ferr_global >> 18) & 0x3ff;
 954         stat32 = (info->ferr_global >> 4) & 0x7ff;
 955
 956         if (error32)
 957                 global_error(1, error32, &error_found, handle_errors);
 958
 959         if (stat32)
 960                 global_error(0, stat32, &error_found, handle_errors);
 961
 962         error32 = (info->nerr_global >> 18) & 0x3ff;
 963         stat32 = (info->nerr_global >> 4) & 0x7ff;
 964
 965         if (error32)
 966                 global_error(1, error32, &error_found, handle_errors);
 967
 968         if (stat32)
 969                 global_error(0, stat32, &error_found, handle_errors);
 970
 971         e752x_check_hub_interface(info, &error_found, handle_errors);
 972         e752x_check_ns_interface(info, &error_found, handle_errors);
 973         e752x_check_sysbus(info, &error_found, handle_errors);
 974         e752x_check_membuf(info, &error_found, handle_errors);
 975         e752x_check_dram(mci, info, &error_found, handle_errors);
 976         return error_found;
 977 }
 978
 979 static void e752x_check(struct mem_ctl_info *mci)
 980 {
 981         struct e752x_error_info info;
 982
 983         edac_dbg(3, "\n");
 984         e752x_get_error_info(mci, &info);
 985         e752x_process_error_info(mci, &info, 1);
 986 }
 987
 988 /* Program byte/sec bandwidth scrub rate to hardware */
 989 static int set_sdram_scrub_rate(struct mem_ctl_info *mci, u32 new_bw)
 990 {
 991         const struct scrubrate *scrubrates;
 992         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
 993         struct pci_dev *pdev = pvt->dev_d0f0;
 994         int i;
 995
 996         if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
 997                 scrubrates = scrubrates_i3100;
 998         else
 999                 scrubrates = scrubrates_e752x;
1000
1001         /* Translate the desired scrub rate to a e752x/3100 register value.
1002          * Search for the bandwidth that is equal or greater than the
1003          * desired rate and program the cooresponding register value.
1004          */
1005         for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1006                 if (scrubrates[i].bandwidth >= new_bw)
1007                         break;
1008
1009         if (scrubrates[i].bandwidth == SDRATE_EOT)
1010                 return -1;
1011
1012         pci_write_config_word(pdev, E752X_MCHSCRB, scrubrates[i].scrubval);
1013
1014         return scrubrates[i].bandwidth;
1015 }
1016
1017 /* Convert current scrub rate value into byte/sec bandwidth */
1018 static int get_sdram_scrub_rate(struct mem_ctl_info *mci)
1019 {
1020         const struct scrubrate *scrubrates;
1021         struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
1022         struct pci_dev *pdev = pvt->dev_d0f0;
1023         u16 scrubval;
1024         int i;
1025
1026         if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
1027                 scrubrates = scrubrates_i3100;
1028         else
1029                 scrubrates = scrubrates_e752x;
1030
1031         /* Find the bandwidth matching the memory scrubber configuration */
1032         pci_read_config_word(pdev, E752X_MCHSCRB, &scrubval);
1033         scrubval = scrubval & 0x0f;
1034
1035         for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1036                 if (scrubrates[i].scrubval == scrubval)
1037                         break;
1038
1039         if (scrubrates[i].bandwidth == SDRATE_EOT) {
1040                 e752x_printk(KERN_WARNING,
1041                         "Invalid sdram scrub control value: 0x%x\n", scrubval);
1042                 return -1;
1043         }
1044         return scrubrates[i].bandwidth;
1045
1046 }
1047
1048 /* Return 1 if dual channel mode is active.  Else return 0. */
1049 static inline int dual_channel_active(u16 ddrcsr)
1050 {
1051         return (((ddrcsr >> 12) & 3) == 3);
1052 }
1053
1054 /* Remap csrow index numbers if map_type is "reverse"
1055  */
1056 static inline int remap_csrow_index(struct mem_ctl_info *mci, int index)
1057 {
1058         struct e752x_pvt *pvt = mci->pvt_info;
1059
1060         if (!pvt->map_type)
1061                 return (7 - index);
1062
1063         return (index);
1064 }
1065
1066 static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
1067                         u16 ddrcsr)
1068 {
1069         struct csrow_info *csrow;
1070         enum edac_type edac_mode;
1071         unsigned long last_cumul_size;
1072         int index, mem_dev, drc_chan;
1073         int drc_drbg;           /* DRB granularity 0=64mb, 1=128mb */
1074         int drc_ddim;           /* DRAM Data Integrity Mode 0=none, 2=edac */
1075         u8 value;
1076         u32 dra, drc, cumul_size, i, nr_pages;
1077
1078         dra = 0;
1079         for (index = 0; index < 4; index++) {
1080                 u8 dra_reg;
1081                 pci_read_config_byte(pdev, E752X_DRA + index, &dra_reg);
1082                 dra |= dra_reg << (index * 8);
1083         }
1084         pci_read_config_dword(pdev, E752X_DRC, &drc);
1085         drc_chan = dual_channel_active(ddrcsr) ? 1 : 0;
1086         drc_drbg = drc_chan + 1;        /* 128 in dual mode, 64 in single */
1087         drc_ddim = (drc >> 20) & 0x3;
1088
1089         /* The dram row boundary (DRB) reg values are boundary address for
1090          * each DRAM row with a granularity of 64 or 128MB (single/dual
1091          * channel operation).  DRB regs are cumulative; therefore DRB7 will
1092          * contain the total memory contained in all eight rows.
1093          */
1094         for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) {
1095                 /* mem_dev 0=x8, 1=x4 */
1096                 mem_dev = (dra >> (index * 4 + 2)) & 0x3;
1097                 csrow = mci->csrows[remap_csrow_index(mci, index)];
1098
1099                 mem_dev = (mem_dev == 2);
1100                 pci_read_config_byte(pdev, E752X_DRB + index, &value);
1101                 /* convert a 128 or 64 MiB DRB to a page size. */
1102                 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
1103                 edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
1104                 if (cumul_size == last_cumul_size)
1105                         continue;       /* not populated */
1106
1107                 csrow->first_page = last_cumul_size;
1108                 csrow->last_page = cumul_size - 1;
1109                 nr_pages = cumul_size - last_cumul_size;
1110                 last_cumul_size = cumul_size;
1111
1112                 /*
1113                 * if single channel or x8 devices then SECDED
1114                 * if dual channel and x4 then S4ECD4ED
1115                 */
1116                 if (drc_ddim) {
1117                         if (drc_chan && mem_dev) {
1118                                 edac_mode = EDAC_S4ECD4ED;
1119                                 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
1120                         } else {
1121                                 edac_mode = EDAC_SECDED;
1122                                 mci->edac_cap |= EDAC_FLAG_SECDED;
1123                         }
1124                 } else
1125                         edac_mode = EDAC_NONE;
1126                 for (i = 0; i < csrow->nr_channels; i++) {
1127                         struct dimm_info *dimm = csrow->channels[i]->dimm;
1128
1129                         edac_dbg(3, "Initializing rank at (%i,%i)\n", index, i);
1130                         dimm->nr_pages = nr_pages / csrow->nr_channels;
1131                         dimm->grain = 1 << 12;  /* 4KiB - resolution of CELOG */
1132                         dimm->mtype = MEM_RDDR; /* only one type supported */
1133                         dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
1134                         dimm->edac_mode = edac_mode;
1135                 }
1136         }
1137 }
1138
1139 static void e752x_init_mem_map_table(struct pci_dev *pdev,
1140                                 struct e752x_pvt *pvt)
1141 {
1142         int index;
1143         u8 value, last, row;
1144
1145         last = 0;
1146         row = 0;
1147
1148         for (index = 0; index < 8; index += 2) {
1149                 pci_read_config_byte(pdev, E752X_DRB + index, &value);
1150                 /* test if there is a dimm in this slot */
1151                 if (value == last) {
1152                         /* no dimm in the slot, so flag it as empty */
1153                         pvt->map[index] = 0xff;
1154                         pvt->map[index + 1] = 0xff;
1155                 } else {        /* there is a dimm in the slot */
1156                         pvt->map[index] = row;
1157                         row++;
1158                         last = value;
1159                         /* test the next value to see if the dimm is double
1160                          * sided
1161                          */
1162                         pci_read_config_byte(pdev, E752X_DRB + index + 1,
1163                                         &value);
1164
1165                         /* the dimm is single sided, so flag as empty */
1166                         /* this is a double sided dimm to save the next row #*/
1167                         pvt->map[index + 1] = (value == last) ? 0xff :  row;
1168                         row++;
1169                         last = value;
1170                 }
1171         }
1172 }
1173
1174 /* Return 0 on success or 1 on failure. */
1175 static int e752x_get_devs(struct pci_dev *pdev, int dev_idx,
1176                         struct e752x_pvt *pvt)
1177 {
1178         pvt->dev_d0f1 = pci_get_device(PCI_VENDOR_ID_INTEL,
1179                                 pvt->dev_info->err_dev, NULL);
1180
1181         if (pvt->dev_d0f1 == NULL) {
1182                 pvt->dev_d0f1 = pci_scan_single_device(pdev->bus,
1183                                                         PCI_DEVFN(0, 1));
1184                 pci_dev_get(pvt->dev_d0f1);
1185         }
1186
1187         if (pvt->dev_d0f1 == NULL) {
1188                 e752x_printk(KERN_ERR, "error reporting device not found:"
1189                         "vendor %x device 0x%x (broken BIOS?)\n",
1190                         PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
1191                 return 1;
1192         }
1193
1194         pvt->dev_d0f0 = pci_get_device(PCI_VENDOR_ID_INTEL,
1195                                 e752x_devs[dev_idx].ctl_dev,
1196                                 NULL);
1197
1198         if (pvt->dev_d0f0 == NULL)
1199                 goto fail;
1200
1201         return 0;
1202
1203 fail:
1204         pci_dev_put(pvt->dev_d0f1);
1205         return 1;
1206 }
1207
1208 /* Setup system bus parity mask register.
1209  * Sysbus parity supported on:
1210  * e7320/e7520/e7525 + Xeon
1211  */
1212 static void e752x_init_sysbus_parity_mask(struct e752x_pvt *pvt)
1213 {
1214         char *cpu_id = cpu_data(0).x86_model_id;
1215         struct pci_dev *dev = pvt->dev_d0f1;
1216         int enable = 1;
1217
1218         /* Allow module parameter override, else see if CPU supports parity */
1219         if (sysbus_parity != -1) {
1220                 enable = sysbus_parity;
1221         } else if (cpu_id[0] && !strstr(cpu_id, "Xeon")) {
1222                 e752x_printk(KERN_INFO, "System Bus Parity not "
1223                              "supported by CPU, disabling\n");
1224                 enable = 0;
1225         }
1226
1227         if (enable)
1228                 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0000);
1229         else
1230                 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0309);
1231 }
1232
1233 static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt)
1234 {
1235         struct pci_dev *dev;
1236
1237         dev = pvt->dev_d0f1;
1238         /* Turn off error disable & SMI in case the BIOS turned it on */
1239         if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
1240                 pci_write_config_dword(dev, I3100_NSI_EMASK, 0);
1241                 pci_write_config_dword(dev, I3100_NSI_SMICMD, 0);
1242         } else {
1243                 pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00);
1244                 pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00);
1245         }
1246
1247         e752x_init_sysbus_parity_mask(pvt);
1248
1249         pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00);
1250         pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00);
1251         pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00);
1252         pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00);
1253         pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00);
1254 }
1255
1256 static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
1257 {
1258         u16 pci_data;
1259         u8 stat8;
1260         struct mem_ctl_info *mci;
1261         struct edac_mc_layer layers[2];
1262         struct e752x_pvt *pvt;
1263         u16 ddrcsr;
1264         int drc_chan;           /* Number of channels 0=1chan,1=2chan */
1265         struct e752x_error_info discard;
1266
1267         edac_dbg(0, "mci\n");
1268         edac_dbg(0, "Starting Probe1\n");
1269
1270         /* check to see if device 0 function 1 is enabled; if it isn't, we
1271          * assume the BIOS has reserved it for a reason and is expecting
1272          * exclusive access, we take care not to violate that assumption and
1273          * fail the probe. */
1274         pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
1275         if (!force_function_unhide && !(stat8 & (1 << 5))) {
1276                 printk(KERN_INFO "Contact your BIOS vendor to see if the "
1277                         "E752x error registers can be safely un-hidden\n");
1278                 return -ENODEV;
1279         }
1280         stat8 |= (1 << 5);
1281         pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
1282
1283         pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr);
1284         /* FIXME: should check >>12 or 0xf, true for all? */
1285         /* Dual channel = 1, Single channel = 0 */
1286         drc_chan = dual_channel_active(ddrcsr);
1287
1288         layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
1289         layers[0].size = E752X_NR_CSROWS;
1290         layers[0].is_virt_csrow = true;
1291         layers[1].type = EDAC_MC_LAYER_CHANNEL;
1292         layers[1].size = drc_chan + 1;
1293         layers[1].is_virt_csrow = false;
1294         mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
1295         if (mci == NULL)
1296                 return -ENOMEM;
1297
1298         edac_dbg(3, "init mci\n");
1299         mci->mtype_cap = MEM_FLAG_RDDR;
1300         /* 3100 IMCH supports SECDEC only */
1301         mci->edac_ctl_cap = (dev_idx == I3100) ? EDAC_FLAG_SECDED :
1302                 (EDAC_FLAG_NONE | EDAC_FLAG_SECDED | EDAC_FLAG_S4ECD4ED);
1303         /* FIXME - what if different memory types are in different csrows? */
1304         mci->mod_name = EDAC_MOD_STR;
1305         mci->pdev = &pdev->dev;
1306
1307         edac_dbg(3, "init pvt\n");
1308         pvt = (struct e752x_pvt *)mci->pvt_info;
1309         pvt->dev_info = &e752x_devs[dev_idx];
1310         pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
1311
1312         if (e752x_get_devs(pdev, dev_idx, pvt)) {
1313                 edac_mc_free(mci);
1314                 return -ENODEV;
1315         }
1316
1317         edac_dbg(3, "more mci init\n");
1318         mci->ctl_name = pvt->dev_info->ctl_name;
1319         mci->dev_name = pci_name(pdev);
1320         mci->edac_check = e752x_check;
1321         mci->ctl_page_to_phys = ctl_page_to_phys;
1322         mci->set_sdram_scrub_rate = set_sdram_scrub_rate;
1323         mci->get_sdram_scrub_rate = get_sdram_scrub_rate;
1324
1325         /* set the map type.  1 = normal, 0 = reversed
1326          * Must be set before e752x_init_csrows in case csrow mapping
1327          * is reversed.
1328          */
1329         pci_read_config_byte(pdev, E752X_DRM, &stat8);
1330         pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
1331
1332         e752x_init_csrows(mci, pdev, ddrcsr);
1333         e752x_init_mem_map_table(pdev, pvt);
1334
1335         if (dev_idx == I3100)
1336                 mci->edac_cap = EDAC_FLAG_SECDED; /* the only mode supported */
1337         else
1338                 mci->edac_cap |= EDAC_FLAG_NONE;
1339         edac_dbg(3, "tolm, remapbase, remaplimit\n");
1340
1341         /* load the top of low memory, remap base, and remap limit vars */
1342         pci_read_config_word(pdev, E752X_TOLM, &pci_data);
1343         pvt->tolm = ((u32) pci_data) << 4;
1344         pci_read_config_word(pdev, E752X_REMAPBASE, &pci_data);
1345         pvt->remapbase = ((u32) pci_data) << 14;
1346         pci_read_config_word(pdev, E752X_REMAPLIMIT, &pci_data);
1347         pvt->remaplimit = ((u32) pci_data) << 14;
1348         e752x_printk(KERN_INFO,
1349                         "tolm = %x, remapbase = %x, remaplimit = %x\n",
1350                         pvt->tolm, pvt->remapbase, pvt->remaplimit);
1351
1352         /* Here we assume that we will never see multiple instances of this
1353          * type of memory controller.  The ID is therefore hardcoded to 0.
1354          */
1355         if (edac_mc_add_mc(mci)) {
1356                 edac_dbg(3, "failed edac_mc_add_mc()\n");
1357                 goto fail;
1358         }
1359
1360         e752x_init_error_reporting_regs(pvt);
1361         e752x_get_error_info(mci, &discard);    /* clear other MCH errors */
1362
1363         /* allocating generic PCI control info */
1364         e752x_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
1365         if (!e752x_pci) {
1366                 printk(KERN_WARNING
1367                         "%s(): Unable to create PCI control\n", __func__);
1368                 printk(KERN_WARNING
1369                         "%s(): PCI error report via EDAC not setup\n",
1370                         __func__);
1371         }
1372
1373         /* get this far and it's successful */
1374         edac_dbg(3, "success\n");
1375         return 0;
1376
1377 fail:
1378         pci_dev_put(pvt->dev_d0f0);
1379         pci_dev_put(pvt->dev_d0f1);
1380         edac_mc_free(mci);
1381
1382         return -ENODEV;
1383 }
1384
1385 /* returns count (>= 0), or negative on error */
1386 static int e752x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1387 {
1388         edac_dbg(0, "\n");
1389
1390         /* wake up and enable device */
1391         if (pci_enable_device(pdev) < 0)
1392                 return -EIO;
1393
1394         return e752x_probe1(pdev, ent->driver_data);
1395 }
1396
1397 static void e752x_remove_one(struct pci_dev *pdev)
1398 {
1399         struct mem_ctl_info *mci;
1400         struct e752x_pvt *pvt;
1401
1402         edac_dbg(0, "\n");
1403
1404         if (e752x_pci)
1405                 edac_pci_release_generic_ctl(e752x_pci);
1406
1407         if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
1408                 return;
1409
1410         pvt = (struct e752x_pvt *)mci->pvt_info;
1411         pci_dev_put(pvt->dev_d0f0);
1412         pci_dev_put(pvt->dev_d0f1);
1413         edac_mc_free(mci);
1414 }
1415
1416 static const struct pci_device_id e752x_pci_tbl[] = {
1417         {
1418          PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1419          E7520},
1420         {
1421          PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1422          E7525},
1423         {
1424          PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1425          E7320},
1426         {
1427          PCI_VEND_DEV(INTEL, 3100_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1428          I3100},
1429         {
1430          0,
1431          }                      /* 0 terminated list. */
1432 };
1433
1434 MODULE_DEVICE_TABLE(pci, e752x_pci_tbl);
1435
1436 static struct pci_driver e752x_driver = {
1437         .name = EDAC_MOD_STR,
1438         .probe = e752x_init_one,
1439         .remove = e752x_remove_one,
1440         .id_table = e752x_pci_tbl,
1441 };
1442
1443 static int __init e752x_init(void)
1444 {
1445         int pci_rc;
1446
1447         edac_dbg(3, "\n");
1448
1449        /* Ensure that the OPSTATE is set correctly for POLL or NMI */
1450        opstate_init();
1451
1452         pci_rc = pci_register_driver(&e752x_driver);
1453         return (pci_rc < 0) ? pci_rc : 0;
1454 }
1455
1456 static void __exit e752x_exit(void)
1457 {
1458         edac_dbg(3, "\n");
1459         pci_unregister_driver(&e752x_driver);
1460 }
1461
1462 module_init(e752x_init);
1463 module_exit(e752x_exit);
1464
1465 MODULE_LICENSE("GPL");
1466 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n");
1467 MODULE_DESCRIPTION("MC support for Intel e752x/3100 memory controllers");
1468
1469 module_param(force_function_unhide, int, 0444);
1470 MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:"
1471                  " 1=force unhide and hope BIOS doesn't fight driver for "
1472                 "Dev0:Fun1 access");
1473
1474 module_param(edac_op_state, int, 0444);
1475 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
1476
1477 module_param(sysbus_parity, int, 0444);
1478 MODULE_PARM_DESC(sysbus_parity, "0=disable system bus parity checking,"
1479                 " 1=enable system bus parity checking, default=auto-detect");
1480 module_param(report_non_memory_errors, int, 0644);
1481 MODULE_PARM_DESC(report_non_memory_errors, "0=disable non-memory error "
1482                 "reporting, 1=enable non-memory error reporting");