1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Intel Sandy Bridge -EN/-EP/-EX Memory Controller kernel module 3 * 4 * This driver supports the memory controllers found on the Intel 5 * processor family Sandy Bridge. 6 * 7 * Copyright (c) 2011 by: 8 * Mauro Carvalho Chehab 9 */ 10 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/pci.h> 14 #include <linux/pci_ids.h> 15 #include <linux/slab.h> 16 #include <linux/delay.h> 17 #include <linux/edac.h> 18 #include <linux/mmzone.h> 19 #include <linux/smp.h> 20 #include <linux/bitmap.h> 21 #include <linux/math64.h> 22 #include <linux/mod_devicetable.h> 23 #include <asm/cpu_device_id.h> 24 #include <asm/intel-family.h> 25 #include <asm/processor.h> 26 #include <asm/mce.h> 27 28 #include "edac_module.h" 29 30 /* Static vars */ 31 static LIST_HEAD(sbridge_edac_list); 32 33 /* 34 * Alter this version for the module when modifications are made 35 */ 36 #define SBRIDGE_REVISION " Ver: 1.1.2 " 37 #define EDAC_MOD_STR "sb_edac" 38 39 /* 40 * Debug macros 41 */ 42 #define sbridge_printk(level, fmt, arg...) \ 43 edac_printk(level, "sbridge", fmt, ##arg) 44 45 #define sbridge_mc_printk(mci, level, fmt, arg...) \ 46 edac_mc_chipset_printk(mci, level, "sbridge", fmt, ##arg) 47 48 /* 49 * Get a bit field at register value <v>, from bit <lo> to bit <hi> 50 */ 51 #define GET_BITFIELD(v, lo, hi) \ 52 (((v) & GENMASK_ULL(hi, lo)) >> (lo)) 53 54 /* Devices 12 Function 6, Offsets 0x80 to 0xcc */ 55 static const u32 sbridge_dram_rule[] = { 56 0x80, 0x88, 0x90, 0x98, 0xa0, 57 0xa8, 0xb0, 0xb8, 0xc0, 0xc8, 58 }; 59 60 static const u32 ibridge_dram_rule[] = { 61 0x60, 0x68, 0x70, 0x78, 0x80, 62 0x88, 0x90, 0x98, 0xa0, 0xa8, 63 0xb0, 0xb8, 0xc0, 0xc8, 0xd0, 64 0xd8, 0xe0, 0xe8, 0xf0, 0xf8, 65 }; 66 67 static const u32 knl_dram_rule[] = { 68 0x60, 0x68, 0x70, 0x78, 0x80, /* 0-4 */ 69 0x88, 0x90, 0x98, 0xa0, 0xa8, /* 5-9 */ 70 0xb0, 0xb8, 0xc0, 0xc8, 0xd0, /* 10-14 */ 71 0xd8, 0xe0, 0xe8, 0xf0, 0xf8, /* 15-19 */ 72 0x100, 0x108, 0x110, 0x118, /* 20-23 */ 73 }; 74 75 #define DRAM_RULE_ENABLE(reg) GET_BITFIELD(reg, 0, 0) 76 #define A7MODE(reg) GET_BITFIELD(reg, 26, 26) 77 show_dram_attr(u32 attr)78 static char *show_dram_attr(u32 attr) 79 { 80 switch (attr) { 81 case 0: 82 return "DRAM"; 83 case 1: 84 return "MMCFG"; 85 case 2: 86 return "NXM"; 87 default: 88 return "unknown"; 89 } 90 } 91 92 static const u32 sbridge_interleave_list[] = { 93 0x84, 0x8c, 0x94, 0x9c, 0xa4, 94 0xac, 0xb4, 0xbc, 0xc4, 0xcc, 95 }; 96 97 static const u32 ibridge_interleave_list[] = { 98 0x64, 0x6c, 0x74, 0x7c, 0x84, 99 0x8c, 0x94, 0x9c, 0xa4, 0xac, 100 0xb4, 0xbc, 0xc4, 0xcc, 0xd4, 101 0xdc, 0xe4, 0xec, 0xf4, 0xfc, 102 }; 103 104 static const u32 knl_interleave_list[] = { 105 0x64, 0x6c, 0x74, 0x7c, 0x84, /* 0-4 */ 106 0x8c, 0x94, 0x9c, 0xa4, 0xac, /* 5-9 */ 107 0xb4, 0xbc, 0xc4, 0xcc, 0xd4, /* 10-14 */ 108 0xdc, 0xe4, 0xec, 0xf4, 0xfc, /* 15-19 */ 109 0x104, 0x10c, 0x114, 0x11c, /* 20-23 */ 110 }; 111 #define MAX_INTERLEAVE \ 112 (max_t(unsigned int, ARRAY_SIZE(sbridge_interleave_list), \ 113 max_t(unsigned int, ARRAY_SIZE(ibridge_interleave_list), \ 114 ARRAY_SIZE(knl_interleave_list)))) 115 116 struct interleave_pkg { 117 unsigned char start; 118 unsigned char end; 119 }; 120 121 static const struct interleave_pkg sbridge_interleave_pkg[] = { 122 { 0, 2 }, 123 { 3, 5 }, 124 { 8, 10 }, 125 { 11, 13 }, 126 { 16, 18 }, 127 { 19, 21 }, 128 { 24, 26 }, 129 { 27, 29 }, 130 }; 131 132 static const struct interleave_pkg ibridge_interleave_pkg[] = { 133 { 0, 3 }, 134 { 4, 7 }, 135 { 8, 11 }, 136 { 12, 15 }, 137 { 16, 19 }, 138 { 20, 23 }, 139 { 24, 27 }, 140 { 28, 31 }, 141 }; 142 sad_pkg(const struct interleave_pkg * table,u32 reg,int interleave)143 static inline int sad_pkg(const struct interleave_pkg *table, u32 reg, 144 int interleave) 145 { 146 return GET_BITFIELD(reg, table[interleave].start, 147 table[interleave].end); 148 } 149 150 /* Devices 12 Function 7 */ 151 152 #define TOLM 0x80 153 #define TOHM 0x84 154 #define HASWELL_TOLM 0xd0 155 #define HASWELL_TOHM_0 0xd4 156 #define HASWELL_TOHM_1 0xd8 157 #define KNL_TOLM 0xd0 158 #define KNL_TOHM_0 0xd4 159 #define KNL_TOHM_1 0xd8 160 161 #define GET_TOLM(reg) ((GET_BITFIELD(reg, 0, 3) << 28) | 0x3ffffff) 162 #define GET_TOHM(reg) ((GET_BITFIELD(reg, 0, 20) << 25) | 0x3ffffff) 163 164 /* Device 13 Function 6 */ 165 166 #define SAD_TARGET 0xf0 167 168 #define SOURCE_ID(reg) GET_BITFIELD(reg, 9, 11) 169 170 #define SOURCE_ID_KNL(reg) GET_BITFIELD(reg, 12, 14) 171 172 #define SAD_CONTROL 0xf4 173 174 /* Device 14 function 0 */ 175 176 static const u32 tad_dram_rule[] = { 177 0x40, 0x44, 0x48, 0x4c, 178 0x50, 0x54, 0x58, 0x5c, 179 0x60, 0x64, 0x68, 0x6c, 180 }; 181 #define MAX_TAD ARRAY_SIZE(tad_dram_rule) 182 183 #define TAD_LIMIT(reg) ((GET_BITFIELD(reg, 12, 31) << 26) | 0x3ffffff) 184 #define TAD_SOCK(reg) GET_BITFIELD(reg, 10, 11) 185 #define TAD_CH(reg) GET_BITFIELD(reg, 8, 9) 186 #define TAD_TGT3(reg) GET_BITFIELD(reg, 6, 7) 187 #define TAD_TGT2(reg) GET_BITFIELD(reg, 4, 5) 188 #define TAD_TGT1(reg) GET_BITFIELD(reg, 2, 3) 189 #define TAD_TGT0(reg) GET_BITFIELD(reg, 0, 1) 190 191 /* Device 15, function 0 */ 192 193 #define MCMTR 0x7c 194 #define KNL_MCMTR 0x624 195 196 #define IS_ECC_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 2, 2) 197 #define IS_LOCKSTEP_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 1, 1) 198 #define IS_CLOSE_PG(mcmtr) GET_BITFIELD(mcmtr, 0, 0) 199 200 /* Device 15, function 1 */ 201 202 #define RASENABLES 0xac 203 #define IS_MIRROR_ENABLED(reg) GET_BITFIELD(reg, 0, 0) 204 205 /* Device 15, functions 2-5 */ 206 207 static const int mtr_regs[] = { 208 0x80, 0x84, 0x88, 209 }; 210 211 static const int knl_mtr_reg = 0xb60; 212 213 #define RANK_DISABLE(mtr) GET_BITFIELD(mtr, 16, 19) 214 #define IS_DIMM_PRESENT(mtr) GET_BITFIELD(mtr, 14, 14) 215 #define RANK_CNT_BITS(mtr) GET_BITFIELD(mtr, 12, 13) 216 #define RANK_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 2, 4) 217 #define COL_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 0, 1) 218 219 static const u32 tad_ch_nilv_offset[] = { 220 0x90, 0x94, 0x98, 0x9c, 221 0xa0, 0xa4, 0xa8, 0xac, 222 0xb0, 0xb4, 0xb8, 0xbc, 223 }; 224 #define CHN_IDX_OFFSET(reg) GET_BITFIELD(reg, 28, 29) 225 #define TAD_OFFSET(reg) (GET_BITFIELD(reg, 6, 25) << 26) 226 227 static const u32 rir_way_limit[] = { 228 0x108, 0x10c, 0x110, 0x114, 0x118, 229 }; 230 #define MAX_RIR_RANGES ARRAY_SIZE(rir_way_limit) 231 232 #define IS_RIR_VALID(reg) GET_BITFIELD(reg, 31, 31) 233 #define RIR_WAY(reg) GET_BITFIELD(reg, 28, 29) 234 235 #define MAX_RIR_WAY 8 236 237 static const u32 rir_offset[MAX_RIR_RANGES][MAX_RIR_WAY] = { 238 { 0x120, 0x124, 0x128, 0x12c, 0x130, 0x134, 0x138, 0x13c }, 239 { 0x140, 0x144, 0x148, 0x14c, 0x150, 0x154, 0x158, 0x15c }, 240 { 0x160, 0x164, 0x168, 0x16c, 0x170, 0x174, 0x178, 0x17c }, 241 { 0x180, 0x184, 0x188, 0x18c, 0x190, 0x194, 0x198, 0x19c }, 242 { 0x1a0, 0x1a4, 0x1a8, 0x1ac, 0x1b0, 0x1b4, 0x1b8, 0x1bc }, 243 }; 244 245 #define RIR_RNK_TGT(type, reg) (((type) == BROADWELL) ? \ 246 GET_BITFIELD(reg, 20, 23) : GET_BITFIELD(reg, 16, 19)) 247 248 #define RIR_OFFSET(type, reg) (((type) == HASWELL || (type) == BROADWELL) ? \ 249 GET_BITFIELD(reg, 2, 15) : GET_BITFIELD(reg, 2, 14)) 250 251 /* Device 16, functions 2-7 */ 252 253 /* 254 * FIXME: Implement the error count reads directly 255 */ 256 257 #define RANK_ODD_OV(reg) GET_BITFIELD(reg, 31, 31) 258 #define RANK_ODD_ERR_CNT(reg) GET_BITFIELD(reg, 16, 30) 259 #define RANK_EVEN_OV(reg) GET_BITFIELD(reg, 15, 15) 260 #define RANK_EVEN_ERR_CNT(reg) GET_BITFIELD(reg, 0, 14) 261 262 #if 0 /* Currently unused*/ 263 static const u32 correrrcnt[] = { 264 0x104, 0x108, 0x10c, 0x110, 265 }; 266 267 static const u32 correrrthrsld[] = { 268 0x11c, 0x120, 0x124, 0x128, 269 }; 270 #endif 271 272 #define RANK_ODD_ERR_THRSLD(reg) GET_BITFIELD(reg, 16, 30) 273 #define RANK_EVEN_ERR_THRSLD(reg) GET_BITFIELD(reg, 0, 14) 274 275 276 /* Device 17, function 0 */ 277 278 #define SB_RANK_CFG_A 0x0328 279 280 #define IB_RANK_CFG_A 0x0320 281 282 /* 283 * sbridge structs 284 */ 285 286 #define NUM_CHANNELS 6 /* Max channels per MC */ 287 #define MAX_DIMMS 3 /* Max DIMMS per channel */ 288 #define KNL_MAX_CHAS 38 /* KNL max num. of Cache Home Agents */ 289 #define KNL_MAX_CHANNELS 6 /* KNL max num. of PCI channels */ 290 #define KNL_MAX_EDCS 8 /* Embedded DRAM controllers */ 291 #define CHANNEL_UNSPECIFIED 0xf /* Intel IA32 SDM 15-14 */ 292 293 enum type { 294 SANDY_BRIDGE, 295 IVY_BRIDGE, 296 HASWELL, 297 BROADWELL, 298 KNIGHTS_LANDING, 299 }; 300 301 enum domain { 302 IMC0 = 0, 303 IMC1, 304 SOCK, 305 }; 306 307 enum mirroring_mode { 308 NON_MIRRORING, 309 ADDR_RANGE_MIRRORING, 310 FULL_MIRRORING, 311 }; 312 313 struct sbridge_pvt; 314 struct sbridge_info { 315 enum type type; 316 u32 mcmtr; 317 u32 rankcfgr; 318 u64 (*get_tolm)(struct sbridge_pvt *pvt); 319 u64 (*get_tohm)(struct sbridge_pvt *pvt); 320 u64 (*rir_limit)(u32 reg); 321 u64 (*sad_limit)(u32 reg); 322 u32 (*interleave_mode)(u32 reg); 323 u32 (*dram_attr)(u32 reg); 324 const u32 *dram_rule; 325 const u32 *interleave_list; 326 const struct interleave_pkg *interleave_pkg; 327 u8 max_sad; 328 u8 (*get_node_id)(struct sbridge_pvt *pvt); 329 u8 (*get_ha)(u8 bank); 330 enum mem_type (*get_memory_type)(struct sbridge_pvt *pvt); 331 enum dev_type (*get_width)(struct sbridge_pvt *pvt, u32 mtr); 332 struct pci_dev *pci_vtd; 333 }; 334 335 struct sbridge_channel { 336 u32 ranks; 337 u32 dimms; 338 struct dimm { 339 u32 rowbits; 340 u32 colbits; 341 u32 bank_xor_enable; 342 u32 amap_fine; 343 } dimm[MAX_DIMMS]; 344 }; 345 346 struct pci_id_descr { 347 int dev_id; 348 int optional; 349 enum domain dom; 350 }; 351 352 struct pci_id_table { 353 const struct pci_id_descr *descr; 354 int n_devs_per_imc; 355 int n_devs_per_sock; 356 int n_imcs_per_sock; 357 enum type type; 358 }; 359 360 struct sbridge_dev { 361 struct list_head list; 362 int seg; 363 u8 bus, mc; 364 u8 node_id, source_id; 365 struct pci_dev **pdev; 366 enum domain dom; 367 int n_devs; 368 int i_devs; 369 struct mem_ctl_info *mci; 370 }; 371 372 struct knl_pvt { 373 struct pci_dev *pci_cha[KNL_MAX_CHAS]; 374 struct pci_dev *pci_channel[KNL_MAX_CHANNELS]; 375 struct pci_dev *pci_mc0; 376 struct pci_dev *pci_mc1; 377 struct pci_dev *pci_mc0_misc; 378 struct pci_dev *pci_mc1_misc; 379 struct pci_dev *pci_mc_info; /* tolm, tohm */ 380 }; 381 382 struct sbridge_pvt { 383 /* Devices per socket */ 384 struct pci_dev *pci_ddrio; 385 struct pci_dev *pci_sad0, *pci_sad1; 386 struct pci_dev *pci_br0, *pci_br1; 387 /* Devices per memory controller */ 388 struct pci_dev *pci_ha, *pci_ta, *pci_ras; 389 struct pci_dev *pci_tad[NUM_CHANNELS]; 390 391 struct sbridge_dev *sbridge_dev; 392 393 struct sbridge_info info; 394 struct sbridge_channel channel[NUM_CHANNELS]; 395 396 /* Memory type detection */ 397 bool is_cur_addr_mirrored, is_lockstep, is_close_pg; 398 bool is_chan_hash; 399 enum mirroring_mode mirror_mode; 400 401 /* Memory description */ 402 u64 tolm, tohm; 403 struct knl_pvt knl; 404 }; 405 406 #define PCI_DESCR(device_id, opt, domain) \ 407 .dev_id = (device_id), \ 408 .optional = opt, \ 409 .dom = domain 410 411 static const struct pci_id_descr pci_dev_descr_sbridge[] = { 412 /* Processor Home Agent */ 413 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0, 0, IMC0) }, 414 415 /* Memory controller */ 416 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA, 0, IMC0) }, 417 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS, 0, IMC0) }, 418 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0, 0, IMC0) }, 419 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1, 0, IMC0) }, 420 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2, 0, IMC0) }, 421 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3, 0, IMC0) }, 422 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO, 1, SOCK) }, 423 424 /* System Address Decoder */ 425 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0, 0, SOCK) }, 426 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1, 0, SOCK) }, 427 428 /* Broadcast Registers */ 429 { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_BR, 0, SOCK) }, 430 }; 431 432 #define PCI_ID_TABLE_ENTRY(A, N, M, T) { \ 433 .descr = A, \ 434 .n_devs_per_imc = N, \ 435 .n_devs_per_sock = ARRAY_SIZE(A), \ 436 .n_imcs_per_sock = M, \ 437 .type = T \ 438 } 439 440 static const struct pci_id_table pci_dev_descr_sbridge_table[] = { 441 PCI_ID_TABLE_ENTRY(pci_dev_descr_sbridge, ARRAY_SIZE(pci_dev_descr_sbridge), 1, SANDY_BRIDGE), 442 {0,} /* 0 terminated list. */ 443 }; 444 445 /* This changes depending if 1HA or 2HA: 446 * 1HA: 447 * 0x0eb8 (17.0) is DDRIO0 448 * 2HA: 449 * 0x0ebc (17.4) is DDRIO0 450 */ 451 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0 0x0eb8 452 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0 0x0ebc 453 454 /* pci ids */ 455 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0 0x0ea0 456 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA 0x0ea8 457 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS 0x0e71 458 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0 0x0eaa 459 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1 0x0eab 460 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2 0x0eac 461 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3 0x0ead 462 #define PCI_DEVICE_ID_INTEL_IBRIDGE_SAD 0x0ec8 463 #define PCI_DEVICE_ID_INTEL_IBRIDGE_BR0 0x0ec9 464 #define PCI_DEVICE_ID_INTEL_IBRIDGE_BR1 0x0eca 465 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1 0x0e60 466 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TA 0x0e68 467 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_RAS 0x0e79 468 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0 0x0e6a 469 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1 0x0e6b 470 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD2 0x0e6c 471 #define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD3 0x0e6d 472 473 static const struct pci_id_descr pci_dev_descr_ibridge[] = { 474 /* Processor Home Agent */ 475 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0, 0, IMC0) }, 476 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1, 1, IMC1) }, 477 478 /* Memory controller */ 479 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA, 0, IMC0) }, 480 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS, 0, IMC0) }, 481 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0, 0, IMC0) }, 482 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1, 0, IMC0) }, 483 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2, 0, IMC0) }, 484 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3, 0, IMC0) }, 485 486 /* Optional, mode 2HA */ 487 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TA, 1, IMC1) }, 488 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_RAS, 1, IMC1) }, 489 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0, 1, IMC1) }, 490 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1, 1, IMC1) }, 491 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD2, 1, IMC1) }, 492 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD3, 1, IMC1) }, 493 494 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0, 1, SOCK) }, 495 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0, 1, SOCK) }, 496 497 /* System Address Decoder */ 498 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_SAD, 0, SOCK) }, 499 500 /* Broadcast Registers */ 501 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_BR0, 1, SOCK) }, 502 { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_BR1, 0, SOCK) }, 503 504 }; 505 506 static const struct pci_id_table pci_dev_descr_ibridge_table[] = { 507 PCI_ID_TABLE_ENTRY(pci_dev_descr_ibridge, 12, 2, IVY_BRIDGE), 508 {0,} /* 0 terminated list. */ 509 }; 510 511 /* Haswell support */ 512 /* EN processor: 513 * - 1 IMC 514 * - 3 DDR3 channels, 2 DPC per channel 515 * EP processor: 516 * - 1 or 2 IMC 517 * - 4 DDR4 channels, 3 DPC per channel 518 * EP 4S processor: 519 * - 2 IMC 520 * - 4 DDR4 channels, 3 DPC per channel 521 * EX processor: 522 * - 2 IMC 523 * - each IMC interfaces with a SMI 2 channel 524 * - each SMI channel interfaces with a scalable memory buffer 525 * - each scalable memory buffer supports 4 DDR3/DDR4 channels, 3 DPC 526 */ 527 #define HASWELL_DDRCRCLKCONTROLS 0xa10 /* Ditto on Broadwell */ 528 #define HASWELL_HASYSDEFEATURE2 0x84 529 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_VTD_MISC 0x2f28 530 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0 0x2fa0 531 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1 0x2f60 532 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA 0x2fa8 533 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TM 0x2f71 534 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA 0x2f68 535 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TM 0x2f79 536 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0 0x2ffc 537 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1 0x2ffd 538 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0 0x2faa 539 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1 0x2fab 540 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2 0x2fac 541 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3 0x2fad 542 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0 0x2f6a 543 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1 0x2f6b 544 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD2 0x2f6c 545 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD3 0x2f6d 546 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0 0x2fbd 547 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO1 0x2fbf 548 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO2 0x2fb9 549 #define PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO3 0x2fbb 550 static const struct pci_id_descr pci_dev_descr_haswell[] = { 551 /* first item must be the HA */ 552 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0, 0, IMC0) }, 553 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1, 1, IMC1) }, 554 555 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA, 0, IMC0) }, 556 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TM, 0, IMC0) }, 557 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0, 0, IMC0) }, 558 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1, 0, IMC0) }, 559 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2, 1, IMC0) }, 560 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3, 1, IMC0) }, 561 562 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA, 1, IMC1) }, 563 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TM, 1, IMC1) }, 564 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0, 1, IMC1) }, 565 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1, 1, IMC1) }, 566 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD2, 1, IMC1) }, 567 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD3, 1, IMC1) }, 568 569 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0, 0, SOCK) }, 570 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1, 0, SOCK) }, 571 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0, 1, SOCK) }, 572 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO1, 1, SOCK) }, 573 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO2, 1, SOCK) }, 574 { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO3, 1, SOCK) }, 575 }; 576 577 static const struct pci_id_table pci_dev_descr_haswell_table[] = { 578 PCI_ID_TABLE_ENTRY(pci_dev_descr_haswell, 13, 2, HASWELL), 579 {0,} /* 0 terminated list. */ 580 }; 581 582 /* Knight's Landing Support */ 583 /* 584 * KNL's memory channels are swizzled between memory controllers. 585 * MC0 is mapped to CH3,4,5 and MC1 is mapped to CH0,1,2 586 */ 587 #define knl_channel_remap(mc, chan) ((mc) ? (chan) : (chan) + 3) 588 589 /* Memory controller, TAD tables, error injection - 2-8-0, 2-9-0 (2 of these) */ 590 #define PCI_DEVICE_ID_INTEL_KNL_IMC_MC 0x7840 591 /* DRAM channel stuff; bank addrs, dimmmtr, etc.. 2-8-2 - 2-9-4 (6 of these) */ 592 #define PCI_DEVICE_ID_INTEL_KNL_IMC_CHAN 0x7843 593 /* kdrwdbu TAD limits/offsets, MCMTR - 2-10-1, 2-11-1 (2 of these) */ 594 #define PCI_DEVICE_ID_INTEL_KNL_IMC_TA 0x7844 595 /* CHA broadcast registers, dram rules - 1-29-0 (1 of these) */ 596 #define PCI_DEVICE_ID_INTEL_KNL_IMC_SAD0 0x782a 597 /* SAD target - 1-29-1 (1 of these) */ 598 #define PCI_DEVICE_ID_INTEL_KNL_IMC_SAD1 0x782b 599 /* Caching / Home Agent */ 600 #define PCI_DEVICE_ID_INTEL_KNL_IMC_CHA 0x782c 601 /* Device with TOLM and TOHM, 0-5-0 (1 of these) */ 602 #define PCI_DEVICE_ID_INTEL_KNL_IMC_TOLHM 0x7810 603 604 /* 605 * KNL differs from SB, IB, and Haswell in that it has multiple 606 * instances of the same device with the same device ID, so we handle that 607 * by creating as many copies in the table as we expect to find. 608 * (Like device ID must be grouped together.) 609 */ 610 611 static const struct pci_id_descr pci_dev_descr_knl[] = { 612 [0 ... 1] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_MC, 0, IMC0)}, 613 [2 ... 7] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_CHAN, 0, IMC0) }, 614 [8] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_TA, 0, IMC0) }, 615 [9] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_TOLHM, 0, IMC0) }, 616 [10] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_SAD0, 0, SOCK) }, 617 [11] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_SAD1, 0, SOCK) }, 618 [12 ... 49] = { PCI_DESCR(PCI_DEVICE_ID_INTEL_KNL_IMC_CHA, 0, SOCK) }, 619 }; 620 621 static const struct pci_id_table pci_dev_descr_knl_table[] = { 622 PCI_ID_TABLE_ENTRY(pci_dev_descr_knl, ARRAY_SIZE(pci_dev_descr_knl), 1, KNIGHTS_LANDING), 623 {0,} 624 }; 625 626 /* 627 * Broadwell support 628 * 629 * DE processor: 630 * - 1 IMC 631 * - 2 DDR3 channels, 2 DPC per channel 632 * EP processor: 633 * - 1 or 2 IMC 634 * - 4 DDR4 channels, 3 DPC per channel 635 * EP 4S processor: 636 * - 2 IMC 637 * - 4 DDR4 channels, 3 DPC per channel 638 * EX processor: 639 * - 2 IMC 640 * - each IMC interfaces with a SMI 2 channel 641 * - each SMI channel interfaces with a scalable memory buffer 642 * - each scalable memory buffer supports 4 DDR3/DDR4 channels, 3 DPC 643 */ 644 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_VTD_MISC 0x6f28 645 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0 0x6fa0 646 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1 0x6f60 647 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA 0x6fa8 648 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TM 0x6f71 649 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TA 0x6f68 650 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TM 0x6f79 651 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0 0x6ffc 652 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1 0x6ffd 653 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0 0x6faa 654 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1 0x6fab 655 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2 0x6fac 656 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3 0x6fad 657 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD0 0x6f6a 658 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD1 0x6f6b 659 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD2 0x6f6c 660 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD3 0x6f6d 661 #define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0 0x6faf 662 663 static const struct pci_id_descr pci_dev_descr_broadwell[] = { 664 /* first item must be the HA */ 665 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0, 0, IMC0) }, 666 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1, 1, IMC1) }, 667 668 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA, 0, IMC0) }, 669 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TM, 0, IMC0) }, 670 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0, 0, IMC0) }, 671 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1, 0, IMC0) }, 672 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2, 1, IMC0) }, 673 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3, 1, IMC0) }, 674 675 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TA, 1, IMC1) }, 676 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TM, 1, IMC1) }, 677 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD0, 1, IMC1) }, 678 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD1, 1, IMC1) }, 679 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD2, 1, IMC1) }, 680 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD3, 1, IMC1) }, 681 682 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0, 0, SOCK) }, 683 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1, 0, SOCK) }, 684 { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0, 1, SOCK) }, 685 }; 686 687 static const struct pci_id_table pci_dev_descr_broadwell_table[] = { 688 PCI_ID_TABLE_ENTRY(pci_dev_descr_broadwell, 10, 2, BROADWELL), 689 {0,} /* 0 terminated list. */ 690 }; 691 692 693 /**************************************************************************** 694 Ancillary status routines 695 ****************************************************************************/ 696 numrank(enum type type,u32 mtr)697 static inline int numrank(enum type type, u32 mtr) 698 { 699 int ranks = (1 << RANK_CNT_BITS(mtr)); 700 int max = 4; 701 702 if (type == HASWELL || type == BROADWELL || type == KNIGHTS_LANDING) 703 max = 8; 704 705 if (ranks > max) { 706 edac_dbg(0, "Invalid number of ranks: %d (max = %i) raw value = %x (%04x)\n", 707 ranks, max, (unsigned int)RANK_CNT_BITS(mtr), mtr); 708 return -EINVAL; 709 } 710 711 return ranks; 712 } 713 numrow(u32 mtr)714 static inline int numrow(u32 mtr) 715 { 716 int rows = (RANK_WIDTH_BITS(mtr) + 12); 717 718 if (rows < 13 || rows > 18) { 719 edac_dbg(0, "Invalid number of rows: %d (should be between 14 and 17) raw value = %x (%04x)\n", 720 rows, (unsigned int)RANK_WIDTH_BITS(mtr), mtr); 721 return -EINVAL; 722 } 723 724 return 1 << rows; 725 } 726 numcol(u32 mtr)727 static inline int numcol(u32 mtr) 728 { 729 int cols = (COL_WIDTH_BITS(mtr) + 10); 730 731 if (cols > 12) { 732 edac_dbg(0, "Invalid number of cols: %d (max = 4) raw value = %x (%04x)\n", 733 cols, (unsigned int)COL_WIDTH_BITS(mtr), mtr); 734 return -EINVAL; 735 } 736 737 return 1 << cols; 738 } 739 get_sbridge_dev(int seg,u8 bus,enum domain dom,int multi_bus,struct sbridge_dev * prev)740 static struct sbridge_dev *get_sbridge_dev(int seg, u8 bus, enum domain dom, 741 int multi_bus, 742 struct sbridge_dev *prev) 743 { 744 struct sbridge_dev *sbridge_dev; 745 746 /* 747 * If we have devices scattered across several busses that pertain 748 * to the same memory controller, we'll lump them all together. 749 */ 750 if (multi_bus) { 751 return list_first_entry_or_null(&sbridge_edac_list, 752 struct sbridge_dev, list); 753 } 754 755 sbridge_dev = list_entry(prev ? prev->list.next 756 : sbridge_edac_list.next, struct sbridge_dev, list); 757 758 list_for_each_entry_from(sbridge_dev, &sbridge_edac_list, list) { 759 if ((sbridge_dev->seg == seg) && (sbridge_dev->bus == bus) && 760 (dom == SOCK || dom == sbridge_dev->dom)) 761 return sbridge_dev; 762 } 763 764 return NULL; 765 } 766 alloc_sbridge_dev(int seg,u8 bus,enum domain dom,const struct pci_id_table * table)767 static struct sbridge_dev *alloc_sbridge_dev(int seg, u8 bus, enum domain dom, 768 const struct pci_id_table *table) 769 { 770 struct sbridge_dev *sbridge_dev; 771 772 sbridge_dev = kzalloc(sizeof(*sbridge_dev), GFP_KERNEL); 773 if (!sbridge_dev) 774 return NULL; 775 776 sbridge_dev->pdev = kcalloc(table->n_devs_per_imc, 777 sizeof(*sbridge_dev->pdev), 778 GFP_KERNEL); 779 if (!sbridge_dev->pdev) { 780 kfree(sbridge_dev); 781 return NULL; 782 } 783 784 sbridge_dev->seg = seg; 785 sbridge_dev->bus = bus; 786 sbridge_dev->dom = dom; 787 sbridge_dev->n_devs = table->n_devs_per_imc; 788 list_add_tail(&sbridge_dev->list, &sbridge_edac_list); 789 790 return sbridge_dev; 791 } 792 free_sbridge_dev(struct sbridge_dev * sbridge_dev)793 static void free_sbridge_dev(struct sbridge_dev *sbridge_dev) 794 { 795 list_del(&sbridge_dev->list); 796 kfree(sbridge_dev->pdev); 797 kfree(sbridge_dev); 798 } 799 sbridge_get_tolm(struct sbridge_pvt * pvt)800 static u64 sbridge_get_tolm(struct sbridge_pvt *pvt) 801 { 802 u32 reg; 803 804 /* Address range is 32:28 */ 805 pci_read_config_dword(pvt->pci_sad1, TOLM, ®); 806 return GET_TOLM(reg); 807 } 808 sbridge_get_tohm(struct sbridge_pvt * pvt)809 static u64 sbridge_get_tohm(struct sbridge_pvt *pvt) 810 { 811 u32 reg; 812 813 pci_read_config_dword(pvt->pci_sad1, TOHM, ®); 814 return GET_TOHM(reg); 815 } 816 ibridge_get_tolm(struct sbridge_pvt * pvt)817 static u64 ibridge_get_tolm(struct sbridge_pvt *pvt) 818 { 819 u32 reg; 820 821 pci_read_config_dword(pvt->pci_br1, TOLM, ®); 822 823 return GET_TOLM(reg); 824 } 825 ibridge_get_tohm(struct sbridge_pvt * pvt)826 static u64 ibridge_get_tohm(struct sbridge_pvt *pvt) 827 { 828 u32 reg; 829 830 pci_read_config_dword(pvt->pci_br1, TOHM, ®); 831 832 return GET_TOHM(reg); 833 } 834 rir_limit(u32 reg)835 static u64 rir_limit(u32 reg) 836 { 837 return ((u64)GET_BITFIELD(reg, 1, 10) << 29) | 0x1fffffff; 838 } 839 sad_limit(u32 reg)840 static u64 sad_limit(u32 reg) 841 { 842 return (GET_BITFIELD(reg, 6, 25) << 26) | 0x3ffffff; 843 } 844 interleave_mode(u32 reg)845 static u32 interleave_mode(u32 reg) 846 { 847 return GET_BITFIELD(reg, 1, 1); 848 } 849 dram_attr(u32 reg)850 static u32 dram_attr(u32 reg) 851 { 852 return GET_BITFIELD(reg, 2, 3); 853 } 854 knl_sad_limit(u32 reg)855 static u64 knl_sad_limit(u32 reg) 856 { 857 return (GET_BITFIELD(reg, 7, 26) << 26) | 0x3ffffff; 858 } 859 knl_interleave_mode(u32 reg)860 static u32 knl_interleave_mode(u32 reg) 861 { 862 return GET_BITFIELD(reg, 1, 2); 863 } 864 865 static const char * const knl_intlv_mode[] = { 866 "[8:6]", "[10:8]", "[14:12]", "[32:30]" 867 }; 868 get_intlv_mode_str(u32 reg,enum type t)869 static const char *get_intlv_mode_str(u32 reg, enum type t) 870 { 871 if (t == KNIGHTS_LANDING) 872 return knl_intlv_mode[knl_interleave_mode(reg)]; 873 else 874 return interleave_mode(reg) ? "[8:6]" : "[8:6]XOR[18:16]"; 875 } 876 dram_attr_knl(u32 reg)877 static u32 dram_attr_knl(u32 reg) 878 { 879 return GET_BITFIELD(reg, 3, 4); 880 } 881 882 get_memory_type(struct sbridge_pvt * pvt)883 static enum mem_type get_memory_type(struct sbridge_pvt *pvt) 884 { 885 u32 reg; 886 enum mem_type mtype; 887 888 if (pvt->pci_ddrio) { 889 pci_read_config_dword(pvt->pci_ddrio, pvt->info.rankcfgr, 890 ®); 891 if (GET_BITFIELD(reg, 11, 11)) 892 /* FIXME: Can also be LRDIMM */ 893 mtype = MEM_RDDR3; 894 else 895 mtype = MEM_DDR3; 896 } else 897 mtype = MEM_UNKNOWN; 898 899 return mtype; 900 } 901 haswell_get_memory_type(struct sbridge_pvt * pvt)902 static enum mem_type haswell_get_memory_type(struct sbridge_pvt *pvt) 903 { 904 u32 reg; 905 bool registered = false; 906 enum mem_type mtype = MEM_UNKNOWN; 907 908 if (!pvt->pci_ddrio) 909 goto out; 910 911 pci_read_config_dword(pvt->pci_ddrio, 912 HASWELL_DDRCRCLKCONTROLS, ®); 913 /* Is_Rdimm */ 914 if (GET_BITFIELD(reg, 16, 16)) 915 registered = true; 916 917 pci_read_config_dword(pvt->pci_ta, MCMTR, ®); 918 if (GET_BITFIELD(reg, 14, 14)) { 919 if (registered) 920 mtype = MEM_RDDR4; 921 else 922 mtype = MEM_DDR4; 923 } else { 924 if (registered) 925 mtype = MEM_RDDR3; 926 else 927 mtype = MEM_DDR3; 928 } 929 930 out: 931 return mtype; 932 } 933 knl_get_width(struct sbridge_pvt * pvt,u32 mtr)934 static enum dev_type knl_get_width(struct sbridge_pvt *pvt, u32 mtr) 935 { 936 /* for KNL value is fixed */ 937 return DEV_X16; 938 } 939 sbridge_get_width(struct sbridge_pvt * pvt,u32 mtr)940 static enum dev_type sbridge_get_width(struct sbridge_pvt *pvt, u32 mtr) 941 { 942 /* there's no way to figure out */ 943 return DEV_UNKNOWN; 944 } 945 __ibridge_get_width(u32 mtr)946 static enum dev_type __ibridge_get_width(u32 mtr) 947 { 948 enum dev_type type = DEV_UNKNOWN; 949 950 switch (mtr) { 951 case 2: 952 type = DEV_X16; 953 break; 954 case 1: 955 type = DEV_X8; 956 break; 957 case 0: 958 type = DEV_X4; 959 break; 960 } 961 962 return type; 963 } 964 ibridge_get_width(struct sbridge_pvt * pvt,u32 mtr)965 static enum dev_type ibridge_get_width(struct sbridge_pvt *pvt, u32 mtr) 966 { 967 /* 968 * ddr3_width on the documentation but also valid for DDR4 on 969 * Haswell 970 */ 971 return __ibridge_get_width(GET_BITFIELD(mtr, 7, 8)); 972 } 973 broadwell_get_width(struct sbridge_pvt * pvt,u32 mtr)974 static enum dev_type broadwell_get_width(struct sbridge_pvt *pvt, u32 mtr) 975 { 976 /* ddr3_width on the documentation but also valid for DDR4 */ 977 return __ibridge_get_width(GET_BITFIELD(mtr, 8, 9)); 978 } 979 knl_get_memory_type(struct sbridge_pvt * pvt)980 static enum mem_type knl_get_memory_type(struct sbridge_pvt *pvt) 981 { 982 /* DDR4 RDIMMS and LRDIMMS are supported */ 983 return MEM_RDDR4; 984 } 985 get_node_id(struct sbridge_pvt * pvt)986 static u8 get_node_id(struct sbridge_pvt *pvt) 987 { 988 u32 reg; 989 pci_read_config_dword(pvt->pci_br0, SAD_CONTROL, ®); 990 return GET_BITFIELD(reg, 0, 2); 991 } 992 haswell_get_node_id(struct sbridge_pvt * pvt)993 static u8 haswell_get_node_id(struct sbridge_pvt *pvt) 994 { 995 u32 reg; 996 997 pci_read_config_dword(pvt->pci_sad1, SAD_CONTROL, ®); 998 return GET_BITFIELD(reg, 0, 3); 999 } 1000 knl_get_node_id(struct sbridge_pvt * pvt)1001 static u8 knl_get_node_id(struct sbridge_pvt *pvt) 1002 { 1003 u32 reg; 1004 1005 pci_read_config_dword(pvt->pci_sad1, SAD_CONTROL, ®); 1006 return GET_BITFIELD(reg, 0, 2); 1007 } 1008 1009 /* 1010 * Use the reporting bank number to determine which memory 1011 * controller (also known as "ha" for "home agent"). Sandy 1012 * Bridge only has one memory controller per socket, so the 1013 * answer is always zero. 1014 */ sbridge_get_ha(u8 bank)1015 static u8 sbridge_get_ha(u8 bank) 1016 { 1017 return 0; 1018 } 1019 1020 /* 1021 * On Ivy Bridge, Haswell and Broadwell the error may be in a 1022 * home agent bank (7, 8), or one of the per-channel memory 1023 * controller banks (9 .. 16). 1024 */ ibridge_get_ha(u8 bank)1025 static u8 ibridge_get_ha(u8 bank) 1026 { 1027 switch (bank) { 1028 case 7 ... 8: 1029 return bank - 7; 1030 case 9 ... 16: 1031 return (bank - 9) / 4; 1032 default: 1033 return 0xff; 1034 } 1035 } 1036 1037 /* Not used, but included for safety/symmetry */ knl_get_ha(u8 bank)1038 static u8 knl_get_ha(u8 bank) 1039 { 1040 return 0xff; 1041 } 1042 haswell_get_tolm(struct sbridge_pvt * pvt)1043 static u64 haswell_get_tolm(struct sbridge_pvt *pvt) 1044 { 1045 u32 reg; 1046 1047 pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOLM, ®); 1048 return (GET_BITFIELD(reg, 26, 31) << 26) | 0x3ffffff; 1049 } 1050 haswell_get_tohm(struct sbridge_pvt * pvt)1051 static u64 haswell_get_tohm(struct sbridge_pvt *pvt) 1052 { 1053 u64 rc; 1054 u32 reg; 1055 1056 pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOHM_0, ®); 1057 rc = GET_BITFIELD(reg, 26, 31); 1058 pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOHM_1, ®); 1059 rc = ((reg << 6) | rc) << 26; 1060 1061 return rc | 0x3ffffff; 1062 } 1063 knl_get_tolm(struct sbridge_pvt * pvt)1064 static u64 knl_get_tolm(struct sbridge_pvt *pvt) 1065 { 1066 u32 reg; 1067 1068 pci_read_config_dword(pvt->knl.pci_mc_info, KNL_TOLM, ®); 1069 return (GET_BITFIELD(reg, 26, 31) << 26) | 0x3ffffff; 1070 } 1071 knl_get_tohm(struct sbridge_pvt * pvt)1072 static u64 knl_get_tohm(struct sbridge_pvt *pvt) 1073 { 1074 u64 rc; 1075 u32 reg_lo, reg_hi; 1076 1077 pci_read_config_dword(pvt->knl.pci_mc_info, KNL_TOHM_0, ®_lo); 1078 pci_read_config_dword(pvt->knl.pci_mc_info, KNL_TOHM_1, ®_hi); 1079 rc = ((u64)reg_hi << 32) | reg_lo; 1080 return rc | 0x3ffffff; 1081 } 1082 1083 haswell_rir_limit(u32 reg)1084 static u64 haswell_rir_limit(u32 reg) 1085 { 1086 return (((u64)GET_BITFIELD(reg, 1, 11) + 1) << 29) - 1; 1087 } 1088 sad_pkg_socket(u8 pkg)1089 static inline u8 sad_pkg_socket(u8 pkg) 1090 { 1091 /* on Ivy Bridge, nodeID is SASS, where A is HA and S is node id */ 1092 return ((pkg >> 3) << 2) | (pkg & 0x3); 1093 } 1094 sad_pkg_ha(u8 pkg)1095 static inline u8 sad_pkg_ha(u8 pkg) 1096 { 1097 return (pkg >> 2) & 0x1; 1098 } 1099 haswell_chan_hash(int idx,u64 addr)1100 static int haswell_chan_hash(int idx, u64 addr) 1101 { 1102 int i; 1103 1104 /* 1105 * XOR even bits from 12:26 to bit0 of idx, 1106 * odd bits from 13:27 to bit1 1107 */ 1108 for (i = 12; i < 28; i += 2) 1109 idx ^= (addr >> i) & 3; 1110 1111 return idx; 1112 } 1113 1114 /* Low bits of TAD limit, and some metadata. */ 1115 static const u32 knl_tad_dram_limit_lo[] = { 1116 0x400, 0x500, 0x600, 0x700, 1117 0x800, 0x900, 0xa00, 0xb00, 1118 }; 1119 1120 /* Low bits of TAD offset. */ 1121 static const u32 knl_tad_dram_offset_lo[] = { 1122 0x404, 0x504, 0x604, 0x704, 1123 0x804, 0x904, 0xa04, 0xb04, 1124 }; 1125 1126 /* High 16 bits of TAD limit and offset. */ 1127 static const u32 knl_tad_dram_hi[] = { 1128 0x408, 0x508, 0x608, 0x708, 1129 0x808, 0x908, 0xa08, 0xb08, 1130 }; 1131 1132 /* Number of ways a tad entry is interleaved. */ 1133 static const u32 knl_tad_ways[] = { 1134 8, 6, 4, 3, 2, 1, 1135 }; 1136 1137 /* 1138 * Retrieve the n'th Target Address Decode table entry 1139 * from the memory controller's TAD table. 1140 * 1141 * @pvt: driver private data 1142 * @entry: which entry you want to retrieve 1143 * @mc: which memory controller (0 or 1) 1144 * @offset: output tad range offset 1145 * @limit: output address of first byte above tad range 1146 * @ways: output number of interleave ways 1147 * 1148 * The offset value has curious semantics. It's a sort of running total 1149 * of the sizes of all the memory regions that aren't mapped in this 1150 * tad table. 1151 */ knl_get_tad(const struct sbridge_pvt * pvt,const int entry,const int mc,u64 * offset,u64 * limit,int * ways)1152 static int knl_get_tad(const struct sbridge_pvt *pvt, 1153 const int entry, 1154 const int mc, 1155 u64 *offset, 1156 u64 *limit, 1157 int *ways) 1158 { 1159 u32 reg_limit_lo, reg_offset_lo, reg_hi; 1160 struct pci_dev *pci_mc; 1161 int way_id; 1162 1163 switch (mc) { 1164 case 0: 1165 pci_mc = pvt->knl.pci_mc0; 1166 break; 1167 case 1: 1168 pci_mc = pvt->knl.pci_mc1; 1169 break; 1170 default: 1171 WARN_ON(1); 1172 return -EINVAL; 1173 } 1174 1175 pci_read_config_dword(pci_mc, 1176 knl_tad_dram_limit_lo[entry], ®_limit_lo); 1177 pci_read_config_dword(pci_mc, 1178 knl_tad_dram_offset_lo[entry], ®_offset_lo); 1179 pci_read_config_dword(pci_mc, 1180 knl_tad_dram_hi[entry], ®_hi); 1181 1182 /* Is this TAD entry enabled? */ 1183 if (!GET_BITFIELD(reg_limit_lo, 0, 0)) 1184 return -ENODEV; 1185 1186 way_id = GET_BITFIELD(reg_limit_lo, 3, 5); 1187 1188 if (way_id < ARRAY_SIZE(knl_tad_ways)) { 1189 *ways = knl_tad_ways[way_id]; 1190 } else { 1191 *ways = 0; 1192 sbridge_printk(KERN_ERR, 1193 "Unexpected value %d in mc_tad_limit_lo wayness field\n", 1194 way_id); 1195 return -ENODEV; 1196 } 1197 1198 /* 1199 * The least significant 6 bits of base and limit are truncated. 1200 * For limit, we fill the missing bits with 1s. 1201 */ 1202 *offset = ((u64) GET_BITFIELD(reg_offset_lo, 6, 31) << 6) | 1203 ((u64) GET_BITFIELD(reg_hi, 0, 15) << 32); 1204 *limit = ((u64) GET_BITFIELD(reg_limit_lo, 6, 31) << 6) | 63 | 1205 ((u64) GET_BITFIELD(reg_hi, 16, 31) << 32); 1206 1207 return 0; 1208 } 1209 1210 /* Determine which memory controller is responsible for a given channel. */ knl_channel_mc(int channel)1211 static int knl_channel_mc(int channel) 1212 { 1213 WARN_ON(channel < 0 || channel >= 6); 1214 1215 return channel < 3 ? 1 : 0; 1216 } 1217 1218 /* 1219 * Get the Nth entry from EDC_ROUTE_TABLE register. 1220 * (This is the per-tile mapping of logical interleave targets to 1221 * physical EDC modules.) 1222 * 1223 * entry 0: 0:2 1224 * 1: 3:5 1225 * 2: 6:8 1226 * 3: 9:11 1227 * 4: 12:14 1228 * 5: 15:17 1229 * 6: 18:20 1230 * 7: 21:23 1231 * reserved: 24:31 1232 */ knl_get_edc_route(int entry,u32 reg)1233 static u32 knl_get_edc_route(int entry, u32 reg) 1234 { 1235 WARN_ON(entry >= KNL_MAX_EDCS); 1236 return GET_BITFIELD(reg, entry*3, (entry*3)+2); 1237 } 1238 1239 /* 1240 * Get the Nth entry from MC_ROUTE_TABLE register. 1241 * (This is the per-tile mapping of logical interleave targets to 1242 * physical DRAM channels modules.) 1243 * 1244 * entry 0: mc 0:2 channel 18:19 1245 * 1: mc 3:5 channel 20:21 1246 * 2: mc 6:8 channel 22:23 1247 * 3: mc 9:11 channel 24:25 1248 * 4: mc 12:14 channel 26:27 1249 * 5: mc 15:17 channel 28:29 1250 * reserved: 30:31 1251 * 1252 * Though we have 3 bits to identify the MC, we should only see 1253 * the values 0 or 1. 1254 */ 1255 knl_get_mc_route(int entry,u32 reg)1256 static u32 knl_get_mc_route(int entry, u32 reg) 1257 { 1258 int mc, chan; 1259 1260 WARN_ON(entry >= KNL_MAX_CHANNELS); 1261 1262 mc = GET_BITFIELD(reg, entry*3, (entry*3)+2); 1263 chan = GET_BITFIELD(reg, (entry*2) + 18, (entry*2) + 18 + 1); 1264 1265 return knl_channel_remap(mc, chan); 1266 } 1267 1268 /* 1269 * Render the EDC_ROUTE register in human-readable form. 1270 * Output string s should be at least KNL_MAX_EDCS*2 bytes. 1271 */ knl_show_edc_route(u32 reg,char * s)1272 static void knl_show_edc_route(u32 reg, char *s) 1273 { 1274 int i; 1275 1276 for (i = 0; i < KNL_MAX_EDCS; i++) { 1277 s[i*2] = knl_get_edc_route(i, reg) + '0'; 1278 s[i*2+1] = '-'; 1279 } 1280 1281 s[KNL_MAX_EDCS*2 - 1] = '\0'; 1282 } 1283 1284 /* 1285 * Render the MC_ROUTE register in human-readable form. 1286 * Output string s should be at least KNL_MAX_CHANNELS*2 bytes. 1287 */ knl_show_mc_route(u32 reg,char * s)1288 static void knl_show_mc_route(u32 reg, char *s) 1289 { 1290 int i; 1291 1292 for (i = 0; i < KNL_MAX_CHANNELS; i++) { 1293 s[i*2] = knl_get_mc_route(i, reg) + '0'; 1294 s[i*2+1] = '-'; 1295 } 1296 1297 s[KNL_MAX_CHANNELS*2 - 1] = '\0'; 1298 } 1299 1300 #define KNL_EDC_ROUTE 0xb8 1301 #define KNL_MC_ROUTE 0xb4 1302 1303 /* Is this dram rule backed by regular DRAM in flat mode? */ 1304 #define KNL_EDRAM(reg) GET_BITFIELD(reg, 29, 29) 1305 1306 /* Is this dram rule cached? */ 1307 #define KNL_CACHEABLE(reg) GET_BITFIELD(reg, 28, 28) 1308 1309 /* Is this rule backed by edc ? */ 1310 #define KNL_EDRAM_ONLY(reg) GET_BITFIELD(reg, 29, 29) 1311 1312 /* Is this rule backed by DRAM, cacheable in EDRAM? */ 1313 #define KNL_CACHEABLE(reg) GET_BITFIELD(reg, 28, 28) 1314 1315 /* Is this rule mod3? */ 1316 #define KNL_MOD3(reg) GET_BITFIELD(reg, 27, 27) 1317 1318 /* 1319 * Figure out how big our RAM modules are. 1320 * 1321 * The DIMMMTR register in KNL doesn't tell us the size of the DIMMs, so we 1322 * have to figure this out from the SAD rules, interleave lists, route tables, 1323 * and TAD rules. 1324 * 1325 * SAD rules can have holes in them (e.g. the 3G-4G hole), so we have to 1326 * inspect the TAD rules to figure out how large the SAD regions really are. 1327 * 1328 * When we know the real size of a SAD region and how many ways it's 1329 * interleaved, we know the individual contribution of each channel to 1330 * TAD is size/ways. 1331 * 1332 * Finally, we have to check whether each channel participates in each SAD 1333 * region. 1334 * 1335 * Fortunately, KNL only supports one DIMM per channel, so once we know how 1336 * much memory the channel uses, we know the DIMM is at least that large. 1337 * (The BIOS might possibly choose not to map all available memory, in which 1338 * case we will underreport the size of the DIMM.) 1339 * 1340 * In theory, we could try to determine the EDC sizes as well, but that would 1341 * only work in flat mode, not in cache mode. 1342 * 1343 * @mc_sizes: Output sizes of channels (must have space for KNL_MAX_CHANNELS 1344 * elements) 1345 */ knl_get_dimm_capacity(struct sbridge_pvt * pvt,u64 * mc_sizes)1346 static int knl_get_dimm_capacity(struct sbridge_pvt *pvt, u64 *mc_sizes) 1347 { 1348 u64 sad_base, sad_limit = 0; 1349 u64 tad_base, tad_size, tad_limit, tad_deadspace, tad_livespace; 1350 int sad_rule = 0; 1351 int tad_rule = 0; 1352 int intrlv_ways, tad_ways; 1353 u32 first_pkg, pkg; 1354 int i; 1355 u64 sad_actual_size[2]; /* sad size accounting for holes, per mc */ 1356 u32 dram_rule, interleave_reg; 1357 u32 mc_route_reg[KNL_MAX_CHAS]; 1358 u32 edc_route_reg[KNL_MAX_CHAS]; 1359 int edram_only; 1360 char edc_route_string[KNL_MAX_EDCS*2]; 1361 char mc_route_string[KNL_MAX_CHANNELS*2]; 1362 int cur_reg_start; 1363 int mc; 1364 int channel; 1365 int participants[KNL_MAX_CHANNELS]; 1366 1367 for (i = 0; i < KNL_MAX_CHANNELS; i++) 1368 mc_sizes[i] = 0; 1369 1370 /* Read the EDC route table in each CHA. */ 1371 cur_reg_start = 0; 1372 for (i = 0; i < KNL_MAX_CHAS; i++) { 1373 pci_read_config_dword(pvt->knl.pci_cha[i], 1374 KNL_EDC_ROUTE, &edc_route_reg[i]); 1375 1376 if (i > 0 && edc_route_reg[i] != edc_route_reg[i-1]) { 1377 knl_show_edc_route(edc_route_reg[i-1], 1378 edc_route_string); 1379 if (cur_reg_start == i-1) 1380 edac_dbg(0, "edc route table for CHA %d: %s\n", 1381 cur_reg_start, edc_route_string); 1382 else 1383 edac_dbg(0, "edc route table for CHA %d-%d: %s\n", 1384 cur_reg_start, i-1, edc_route_string); 1385 cur_reg_start = i; 1386 } 1387 } 1388 knl_show_edc_route(edc_route_reg[i-1], edc_route_string); 1389 if (cur_reg_start == i-1) 1390 edac_dbg(0, "edc route table for CHA %d: %s\n", 1391 cur_reg_start, edc_route_string); 1392 else 1393 edac_dbg(0, "edc route table for CHA %d-%d: %s\n", 1394 cur_reg_start, i-1, edc_route_string); 1395 1396 /* Read the MC route table in each CHA. */ 1397 cur_reg_start = 0; 1398 for (i = 0; i < KNL_MAX_CHAS; i++) { 1399 pci_read_config_dword(pvt->knl.pci_cha[i], 1400 KNL_MC_ROUTE, &mc_route_reg[i]); 1401 1402 if (i > 0 && mc_route_reg[i] != mc_route_reg[i-1]) { 1403 knl_show_mc_route(mc_route_reg[i-1], mc_route_string); 1404 if (cur_reg_start == i-1) 1405 edac_dbg(0, "mc route table for CHA %d: %s\n", 1406 cur_reg_start, mc_route_string); 1407 else 1408 edac_dbg(0, "mc route table for CHA %d-%d: %s\n", 1409 cur_reg_start, i-1, mc_route_string); 1410 cur_reg_start = i; 1411 } 1412 } 1413 knl_show_mc_route(mc_route_reg[i-1], mc_route_string); 1414 if (cur_reg_start == i-1) 1415 edac_dbg(0, "mc route table for CHA %d: %s\n", 1416 cur_reg_start, mc_route_string); 1417 else 1418 edac_dbg(0, "mc route table for CHA %d-%d: %s\n", 1419 cur_reg_start, i-1, mc_route_string); 1420 1421 /* Process DRAM rules */ 1422 for (sad_rule = 0; sad_rule < pvt->info.max_sad; sad_rule++) { 1423 /* previous limit becomes the new base */ 1424 sad_base = sad_limit; 1425 1426 pci_read_config_dword(pvt->pci_sad0, 1427 pvt->info.dram_rule[sad_rule], &dram_rule); 1428 1429 if (!DRAM_RULE_ENABLE(dram_rule)) 1430 break; 1431 1432 edram_only = KNL_EDRAM_ONLY(dram_rule); 1433 1434 sad_limit = pvt->info.sad_limit(dram_rule)+1; 1435 1436 pci_read_config_dword(pvt->pci_sad0, 1437 pvt->info.interleave_list[sad_rule], &interleave_reg); 1438 1439 /* 1440 * Find out how many ways this dram rule is interleaved. 1441 * We stop when we see the first channel again. 1442 */ 1443 first_pkg = sad_pkg(pvt->info.interleave_pkg, 1444 interleave_reg, 0); 1445 for (intrlv_ways = 1; intrlv_ways < 8; intrlv_ways++) { 1446 pkg = sad_pkg(pvt->info.interleave_pkg, 1447 interleave_reg, intrlv_ways); 1448 1449 if ((pkg & 0x8) == 0) { 1450 /* 1451 * 0 bit means memory is non-local, 1452 * which KNL doesn't support 1453 */ 1454 edac_dbg(0, "Unexpected interleave target %d\n", 1455 pkg); 1456 return -1; 1457 } 1458 1459 if (pkg == first_pkg) 1460 break; 1461 } 1462 if (KNL_MOD3(dram_rule)) 1463 intrlv_ways *= 3; 1464 1465 edac_dbg(3, "dram rule %d (base 0x%llx, limit 0x%llx), %d way interleave%s\n", 1466 sad_rule, 1467 sad_base, 1468 sad_limit, 1469 intrlv_ways, 1470 edram_only ? ", EDRAM" : ""); 1471 1472 /* 1473 * Find out how big the SAD region really is by iterating 1474 * over TAD tables (SAD regions may contain holes). 1475 * Each memory controller might have a different TAD table, so 1476 * we have to look at both. 1477 * 1478 * Livespace is the memory that's mapped in this TAD table, 1479 * deadspace is the holes (this could be the MMIO hole, or it 1480 * could be memory that's mapped by the other TAD table but 1481 * not this one). 1482 */ 1483 for (mc = 0; mc < 2; mc++) { 1484 sad_actual_size[mc] = 0; 1485 tad_livespace = 0; 1486 for (tad_rule = 0; 1487 tad_rule < ARRAY_SIZE( 1488 knl_tad_dram_limit_lo); 1489 tad_rule++) { 1490 if (knl_get_tad(pvt, 1491 tad_rule, 1492 mc, 1493 &tad_deadspace, 1494 &tad_limit, 1495 &tad_ways)) 1496 break; 1497 1498 tad_size = (tad_limit+1) - 1499 (tad_livespace + tad_deadspace); 1500 tad_livespace += tad_size; 1501 tad_base = (tad_limit+1) - tad_size; 1502 1503 if (tad_base < sad_base) { 1504 if (tad_limit > sad_base) 1505 edac_dbg(0, "TAD region overlaps lower SAD boundary -- TAD tables may be configured incorrectly.\n"); 1506 } else if (tad_base < sad_limit) { 1507 if (tad_limit+1 > sad_limit) { 1508 edac_dbg(0, "TAD region overlaps upper SAD boundary -- TAD tables may be configured incorrectly.\n"); 1509 } else { 1510 /* TAD region is completely inside SAD region */ 1511 edac_dbg(3, "TAD region %d 0x%llx - 0x%llx (%lld bytes) table%d\n", 1512 tad_rule, tad_base, 1513 tad_limit, tad_size, 1514 mc); 1515 sad_actual_size[mc] += tad_size; 1516 } 1517 } 1518 } 1519 } 1520 1521 for (mc = 0; mc < 2; mc++) { 1522 edac_dbg(3, " total TAD DRAM footprint in table%d : 0x%llx (%lld bytes)\n", 1523 mc, sad_actual_size[mc], sad_actual_size[mc]); 1524 } 1525 1526 /* Ignore EDRAM rule */ 1527 if (edram_only) 1528 continue; 1529 1530 /* Figure out which channels participate in interleave. */ 1531 for (channel = 0; channel < KNL_MAX_CHANNELS; channel++) 1532 participants[channel] = 0; 1533 1534 /* For each channel, does at least one CHA have 1535 * this channel mapped to the given target? 1536 */ 1537 for (channel = 0; channel < KNL_MAX_CHANNELS; channel++) { 1538 int target; 1539 int cha; 1540 1541 for (target = 0; target < KNL_MAX_CHANNELS; target++) { 1542 for (cha = 0; cha < KNL_MAX_CHAS; cha++) { 1543 if (knl_get_mc_route(target, 1544 mc_route_reg[cha]) == channel 1545 && !participants[channel]) { 1546 participants[channel] = 1; 1547 break; 1548 } 1549 } 1550 } 1551 } 1552 1553 for (channel = 0; channel < KNL_MAX_CHANNELS; channel++) { 1554 mc = knl_channel_mc(channel); 1555 if (participants[channel]) { 1556 edac_dbg(4, "mc channel %d contributes %lld bytes via sad entry %d\n", 1557 channel, 1558 sad_actual_size[mc]/intrlv_ways, 1559 sad_rule); 1560 mc_sizes[channel] += 1561 sad_actual_size[mc]/intrlv_ways; 1562 } 1563 } 1564 } 1565 1566 return 0; 1567 } 1568 get_source_id(struct mem_ctl_info * mci)1569 static void get_source_id(struct mem_ctl_info *mci) 1570 { 1571 struct sbridge_pvt *pvt = mci->pvt_info; 1572 u32 reg; 1573 1574 if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL || 1575 pvt->info.type == KNIGHTS_LANDING) 1576 pci_read_config_dword(pvt->pci_sad1, SAD_TARGET, ®); 1577 else 1578 pci_read_config_dword(pvt->pci_br0, SAD_TARGET, ®); 1579 1580 if (pvt->info.type == KNIGHTS_LANDING) 1581 pvt->sbridge_dev->source_id = SOURCE_ID_KNL(reg); 1582 else 1583 pvt->sbridge_dev->source_id = SOURCE_ID(reg); 1584 } 1585 __populate_dimms(struct mem_ctl_info * mci,u64 knl_mc_sizes[KNL_MAX_CHANNELS],enum edac_type mode)1586 static int __populate_dimms(struct mem_ctl_info *mci, 1587 u64 knl_mc_sizes[KNL_MAX_CHANNELS], 1588 enum edac_type mode) 1589 { 1590 struct sbridge_pvt *pvt = mci->pvt_info; 1591 int channels = pvt->info.type == KNIGHTS_LANDING ? KNL_MAX_CHANNELS 1592 : NUM_CHANNELS; 1593 unsigned int i, j, banks, ranks, rows, cols, npages; 1594 struct dimm_info *dimm; 1595 enum mem_type mtype; 1596 u64 size; 1597 1598 mtype = pvt->info.get_memory_type(pvt); 1599 if (mtype == MEM_RDDR3 || mtype == MEM_RDDR4) 1600 edac_dbg(0, "Memory is registered\n"); 1601 else if (mtype == MEM_UNKNOWN) 1602 edac_dbg(0, "Cannot determine memory type\n"); 1603 else 1604 edac_dbg(0, "Memory is unregistered\n"); 1605 1606 if (mtype == MEM_DDR4 || mtype == MEM_RDDR4) 1607 banks = 16; 1608 else 1609 banks = 8; 1610 1611 for (i = 0; i < channels; i++) { 1612 u32 mtr, amap = 0; 1613 1614 int max_dimms_per_channel; 1615 1616 if (pvt->info.type == KNIGHTS_LANDING) { 1617 max_dimms_per_channel = 1; 1618 if (!pvt->knl.pci_channel[i]) 1619 continue; 1620 } else { 1621 max_dimms_per_channel = ARRAY_SIZE(mtr_regs); 1622 if (!pvt->pci_tad[i]) 1623 continue; 1624 pci_read_config_dword(pvt->pci_tad[i], 0x8c, &amap); 1625 } 1626 1627 for (j = 0; j < max_dimms_per_channel; j++) { 1628 dimm = edac_get_dimm(mci, i, j, 0); 1629 if (pvt->info.type == KNIGHTS_LANDING) { 1630 pci_read_config_dword(pvt->knl.pci_channel[i], 1631 knl_mtr_reg, &mtr); 1632 } else { 1633 pci_read_config_dword(pvt->pci_tad[i], 1634 mtr_regs[j], &mtr); 1635 } 1636 edac_dbg(4, "Channel #%d MTR%d = %x\n", i, j, mtr); 1637 1638 if (IS_DIMM_PRESENT(mtr)) { 1639 if (!IS_ECC_ENABLED(pvt->info.mcmtr)) { 1640 sbridge_printk(KERN_ERR, "CPU SrcID #%d, Ha #%d, Channel #%d has DIMMs, but ECC is disabled\n", 1641 pvt->sbridge_dev->source_id, 1642 pvt->sbridge_dev->dom, i); 1643 return -ENODEV; 1644 } 1645 pvt->channel[i].dimms++; 1646 1647 ranks = numrank(pvt->info.type, mtr); 1648 1649 if (pvt->info.type == KNIGHTS_LANDING) { 1650 /* For DDR4, this is fixed. */ 1651 cols = 1 << 10; 1652 rows = knl_mc_sizes[i] / 1653 ((u64) cols * ranks * banks * 8); 1654 } else { 1655 rows = numrow(mtr); 1656 cols = numcol(mtr); 1657 } 1658 1659 size = ((u64)rows * cols * banks * ranks) >> (20 - 3); 1660 npages = MiB_TO_PAGES(size); 1661 1662 edac_dbg(0, "mc#%d: ha %d channel %d, dimm %d, %lld MiB (%d pages) bank: %d, rank: %d, row: %#x, col: %#x\n", 1663 pvt->sbridge_dev->mc, pvt->sbridge_dev->dom, i, j, 1664 size, npages, 1665 banks, ranks, rows, cols); 1666 1667 dimm->nr_pages = npages; 1668 dimm->grain = 32; 1669 dimm->dtype = pvt->info.get_width(pvt, mtr); 1670 dimm->mtype = mtype; 1671 dimm->edac_mode = mode; 1672 pvt->channel[i].dimm[j].rowbits = order_base_2(rows); 1673 pvt->channel[i].dimm[j].colbits = order_base_2(cols); 1674 pvt->channel[i].dimm[j].bank_xor_enable = 1675 GET_BITFIELD(pvt->info.mcmtr, 9, 9); 1676 pvt->channel[i].dimm[j].amap_fine = GET_BITFIELD(amap, 0, 0); 1677 snprintf(dimm->label, sizeof(dimm->label), 1678 "CPU_SrcID#%u_Ha#%u_Chan#%u_DIMM#%u", 1679 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom, i, j); 1680 } 1681 } 1682 } 1683 1684 return 0; 1685 } 1686 get_dimm_config(struct mem_ctl_info * mci)1687 static int get_dimm_config(struct mem_ctl_info *mci) 1688 { 1689 struct sbridge_pvt *pvt = mci->pvt_info; 1690 u64 knl_mc_sizes[KNL_MAX_CHANNELS]; 1691 enum edac_type mode; 1692 u32 reg; 1693 1694 pvt->sbridge_dev->node_id = pvt->info.get_node_id(pvt); 1695 edac_dbg(0, "mc#%d: Node ID: %d, source ID: %d\n", 1696 pvt->sbridge_dev->mc, 1697 pvt->sbridge_dev->node_id, 1698 pvt->sbridge_dev->source_id); 1699 1700 /* KNL doesn't support mirroring or lockstep, 1701 * and is always closed page 1702 */ 1703 if (pvt->info.type == KNIGHTS_LANDING) { 1704 mode = EDAC_S4ECD4ED; 1705 pvt->mirror_mode = NON_MIRRORING; 1706 pvt->is_cur_addr_mirrored = false; 1707 1708 if (knl_get_dimm_capacity(pvt, knl_mc_sizes) != 0) 1709 return -1; 1710 if (pci_read_config_dword(pvt->pci_ta, KNL_MCMTR, &pvt->info.mcmtr)) { 1711 edac_dbg(0, "Failed to read KNL_MCMTR register\n"); 1712 return -ENODEV; 1713 } 1714 } else { 1715 if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL) { 1716 if (pci_read_config_dword(pvt->pci_ha, HASWELL_HASYSDEFEATURE2, ®)) { 1717 edac_dbg(0, "Failed to read HASWELL_HASYSDEFEATURE2 register\n"); 1718 return -ENODEV; 1719 } 1720 pvt->is_chan_hash = GET_BITFIELD(reg, 21, 21); 1721 if (GET_BITFIELD(reg, 28, 28)) { 1722 pvt->mirror_mode = ADDR_RANGE_MIRRORING; 1723 edac_dbg(0, "Address range partial memory mirroring is enabled\n"); 1724 goto next; 1725 } 1726 } 1727 if (pci_read_config_dword(pvt->pci_ras, RASENABLES, ®)) { 1728 edac_dbg(0, "Failed to read RASENABLES register\n"); 1729 return -ENODEV; 1730 } 1731 if (IS_MIRROR_ENABLED(reg)) { 1732 pvt->mirror_mode = FULL_MIRRORING; 1733 edac_dbg(0, "Full memory mirroring is enabled\n"); 1734 } else { 1735 pvt->mirror_mode = NON_MIRRORING; 1736 edac_dbg(0, "Memory mirroring is disabled\n"); 1737 } 1738 1739 next: 1740 if (pci_read_config_dword(pvt->pci_ta, MCMTR, &pvt->info.mcmtr)) { 1741 edac_dbg(0, "Failed to read MCMTR register\n"); 1742 return -ENODEV; 1743 } 1744 if (IS_LOCKSTEP_ENABLED(pvt->info.mcmtr)) { 1745 edac_dbg(0, "Lockstep is enabled\n"); 1746 mode = EDAC_S8ECD8ED; 1747 pvt->is_lockstep = true; 1748 } else { 1749 edac_dbg(0, "Lockstep is disabled\n"); 1750 mode = EDAC_S4ECD4ED; 1751 pvt->is_lockstep = false; 1752 } 1753 if (IS_CLOSE_PG(pvt->info.mcmtr)) { 1754 edac_dbg(0, "address map is on closed page mode\n"); 1755 pvt->is_close_pg = true; 1756 } else { 1757 edac_dbg(0, "address map is on open page mode\n"); 1758 pvt->is_close_pg = false; 1759 } 1760 } 1761 1762 return __populate_dimms(mci, knl_mc_sizes, mode); 1763 } 1764 get_memory_layout(const struct mem_ctl_info * mci)1765 static void get_memory_layout(const struct mem_ctl_info *mci) 1766 { 1767 struct sbridge_pvt *pvt = mci->pvt_info; 1768 int i, j, k, n_sads, n_tads, sad_interl; 1769 u32 reg; 1770 u64 limit, prv = 0; 1771 u64 tmp_mb; 1772 u32 gb, mb; 1773 u32 rir_way; 1774 1775 /* 1776 * Step 1) Get TOLM/TOHM ranges 1777 */ 1778 1779 pvt->tolm = pvt->info.get_tolm(pvt); 1780 tmp_mb = (1 + pvt->tolm) >> 20; 1781 1782 gb = div_u64_rem(tmp_mb, 1024, &mb); 1783 edac_dbg(0, "TOLM: %u.%03u GB (0x%016Lx)\n", 1784 gb, (mb*1000)/1024, (u64)pvt->tolm); 1785 1786 /* Address range is already 45:25 */ 1787 pvt->tohm = pvt->info.get_tohm(pvt); 1788 tmp_mb = (1 + pvt->tohm) >> 20; 1789 1790 gb = div_u64_rem(tmp_mb, 1024, &mb); 1791 edac_dbg(0, "TOHM: %u.%03u GB (0x%016Lx)\n", 1792 gb, (mb*1000)/1024, (u64)pvt->tohm); 1793 1794 /* 1795 * Step 2) Get SAD range and SAD Interleave list 1796 * TAD registers contain the interleave wayness. However, it 1797 * seems simpler to just discover it indirectly, with the 1798 * algorithm bellow. 1799 */ 1800 prv = 0; 1801 for (n_sads = 0; n_sads < pvt->info.max_sad; n_sads++) { 1802 /* SAD_LIMIT Address range is 45:26 */ 1803 pci_read_config_dword(pvt->pci_sad0, pvt->info.dram_rule[n_sads], 1804 ®); 1805 limit = pvt->info.sad_limit(reg); 1806 1807 if (!DRAM_RULE_ENABLE(reg)) 1808 continue; 1809 1810 if (limit <= prv) 1811 break; 1812 1813 tmp_mb = (limit + 1) >> 20; 1814 gb = div_u64_rem(tmp_mb, 1024, &mb); 1815 edac_dbg(0, "SAD#%d %s up to %u.%03u GB (0x%016Lx) Interleave: %s reg=0x%08x\n", 1816 n_sads, 1817 show_dram_attr(pvt->info.dram_attr(reg)), 1818 gb, (mb*1000)/1024, 1819 ((u64)tmp_mb) << 20L, 1820 get_intlv_mode_str(reg, pvt->info.type), 1821 reg); 1822 prv = limit; 1823 1824 pci_read_config_dword(pvt->pci_sad0, pvt->info.interleave_list[n_sads], 1825 ®); 1826 sad_interl = sad_pkg(pvt->info.interleave_pkg, reg, 0); 1827 for (j = 0; j < 8; j++) { 1828 u32 pkg = sad_pkg(pvt->info.interleave_pkg, reg, j); 1829 if (j > 0 && sad_interl == pkg) 1830 break; 1831 1832 edac_dbg(0, "SAD#%d, interleave #%d: %d\n", 1833 n_sads, j, pkg); 1834 } 1835 } 1836 1837 if (pvt->info.type == KNIGHTS_LANDING) 1838 return; 1839 1840 /* 1841 * Step 3) Get TAD range 1842 */ 1843 prv = 0; 1844 for (n_tads = 0; n_tads < MAX_TAD; n_tads++) { 1845 pci_read_config_dword(pvt->pci_ha, tad_dram_rule[n_tads], ®); 1846 limit = TAD_LIMIT(reg); 1847 if (limit <= prv) 1848 break; 1849 tmp_mb = (limit + 1) >> 20; 1850 1851 gb = div_u64_rem(tmp_mb, 1024, &mb); 1852 edac_dbg(0, "TAD#%d: up to %u.%03u GB (0x%016Lx), socket interleave %d, memory interleave %d, TGT: %d, %d, %d, %d, reg=0x%08x\n", 1853 n_tads, gb, (mb*1000)/1024, 1854 ((u64)tmp_mb) << 20L, 1855 (u32)(1 << TAD_SOCK(reg)), 1856 (u32)TAD_CH(reg) + 1, 1857 (u32)TAD_TGT0(reg), 1858 (u32)TAD_TGT1(reg), 1859 (u32)TAD_TGT2(reg), 1860 (u32)TAD_TGT3(reg), 1861 reg); 1862 prv = limit; 1863 } 1864 1865 /* 1866 * Step 4) Get TAD offsets, per each channel 1867 */ 1868 for (i = 0; i < NUM_CHANNELS; i++) { 1869 if (!pvt->channel[i].dimms) 1870 continue; 1871 for (j = 0; j < n_tads; j++) { 1872 pci_read_config_dword(pvt->pci_tad[i], 1873 tad_ch_nilv_offset[j], 1874 ®); 1875 tmp_mb = TAD_OFFSET(reg) >> 20; 1876 gb = div_u64_rem(tmp_mb, 1024, &mb); 1877 edac_dbg(0, "TAD CH#%d, offset #%d: %u.%03u GB (0x%016Lx), reg=0x%08x\n", 1878 i, j, 1879 gb, (mb*1000)/1024, 1880 ((u64)tmp_mb) << 20L, 1881 reg); 1882 } 1883 } 1884 1885 /* 1886 * Step 6) Get RIR Wayness/Limit, per each channel 1887 */ 1888 for (i = 0; i < NUM_CHANNELS; i++) { 1889 if (!pvt->channel[i].dimms) 1890 continue; 1891 for (j = 0; j < MAX_RIR_RANGES; j++) { 1892 pci_read_config_dword(pvt->pci_tad[i], 1893 rir_way_limit[j], 1894 ®); 1895 1896 if (!IS_RIR_VALID(reg)) 1897 continue; 1898 1899 tmp_mb = pvt->info.rir_limit(reg) >> 20; 1900 rir_way = 1 << RIR_WAY(reg); 1901 gb = div_u64_rem(tmp_mb, 1024, &mb); 1902 edac_dbg(0, "CH#%d RIR#%d, limit: %u.%03u GB (0x%016Lx), way: %d, reg=0x%08x\n", 1903 i, j, 1904 gb, (mb*1000)/1024, 1905 ((u64)tmp_mb) << 20L, 1906 rir_way, 1907 reg); 1908 1909 for (k = 0; k < rir_way; k++) { 1910 pci_read_config_dword(pvt->pci_tad[i], 1911 rir_offset[j][k], 1912 ®); 1913 tmp_mb = RIR_OFFSET(pvt->info.type, reg) << 6; 1914 1915 gb = div_u64_rem(tmp_mb, 1024, &mb); 1916 edac_dbg(0, "CH#%d RIR#%d INTL#%d, offset %u.%03u GB (0x%016Lx), tgt: %d, reg=0x%08x\n", 1917 i, j, k, 1918 gb, (mb*1000)/1024, 1919 ((u64)tmp_mb) << 20L, 1920 (u32)RIR_RNK_TGT(pvt->info.type, reg), 1921 reg); 1922 } 1923 } 1924 } 1925 } 1926 get_mci_for_node_id(u8 node_id,u8 ha)1927 static struct mem_ctl_info *get_mci_for_node_id(u8 node_id, u8 ha) 1928 { 1929 struct sbridge_dev *sbridge_dev; 1930 1931 list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) { 1932 if (sbridge_dev->node_id == node_id && sbridge_dev->dom == ha) 1933 return sbridge_dev->mci; 1934 } 1935 return NULL; 1936 } 1937 1938 static u8 sb_close_row[] = { 1939 15, 16, 17, 18, 20, 21, 22, 28, 10, 11, 12, 13, 29, 30, 31, 32, 33 1940 }; 1941 1942 static u8 sb_close_column[] = { 1943 3, 4, 5, 14, 19, 23, 24, 25, 26, 27 1944 }; 1945 1946 static u8 sb_open_row[] = { 1947 14, 15, 16, 20, 28, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33 1948 }; 1949 1950 static u8 sb_open_column[] = { 1951 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 1952 }; 1953 1954 static u8 sb_open_fine_column[] = { 1955 3, 4, 5, 7, 8, 9, 10, 11, 12, 13 1956 }; 1957 sb_bits(u64 addr,int nbits,u8 * bits)1958 static int sb_bits(u64 addr, int nbits, u8 *bits) 1959 { 1960 int i, res = 0; 1961 1962 for (i = 0; i < nbits; i++) 1963 res |= ((addr >> bits[i]) & 1) << i; 1964 return res; 1965 } 1966 sb_bank_bits(u64 addr,int b0,int b1,int do_xor,int x0,int x1)1967 static int sb_bank_bits(u64 addr, int b0, int b1, int do_xor, int x0, int x1) 1968 { 1969 int ret = GET_BITFIELD(addr, b0, b0) | (GET_BITFIELD(addr, b1, b1) << 1); 1970 1971 if (do_xor) 1972 ret ^= GET_BITFIELD(addr, x0, x0) | (GET_BITFIELD(addr, x1, x1) << 1); 1973 1974 return ret; 1975 } 1976 sb_decode_ddr4(struct mem_ctl_info * mci,int ch,u8 rank,u64 rank_addr,char * msg)1977 static bool sb_decode_ddr4(struct mem_ctl_info *mci, int ch, u8 rank, 1978 u64 rank_addr, char *msg) 1979 { 1980 int dimmno = 0; 1981 int row, col, bank_address, bank_group; 1982 struct sbridge_pvt *pvt; 1983 u32 bg0 = 0, rowbits = 0, colbits = 0; 1984 u32 amap_fine = 0, bank_xor_enable = 0; 1985 1986 dimmno = (rank < 12) ? rank / 4 : 2; 1987 pvt = mci->pvt_info; 1988 amap_fine = pvt->channel[ch].dimm[dimmno].amap_fine; 1989 bg0 = amap_fine ? 6 : 13; 1990 rowbits = pvt->channel[ch].dimm[dimmno].rowbits; 1991 colbits = pvt->channel[ch].dimm[dimmno].colbits; 1992 bank_xor_enable = pvt->channel[ch].dimm[dimmno].bank_xor_enable; 1993 1994 if (pvt->is_lockstep) { 1995 pr_warn_once("LockStep row/column decode is not supported yet!\n"); 1996 msg[0] = '\0'; 1997 return false; 1998 } 1999 2000 if (pvt->is_close_pg) { 2001 row = sb_bits(rank_addr, rowbits, sb_close_row); 2002 col = sb_bits(rank_addr, colbits, sb_close_column); 2003 col |= 0x400; /* C10 is autoprecharge, always set */ 2004 bank_address = sb_bank_bits(rank_addr, 8, 9, bank_xor_enable, 22, 28); 2005 bank_group = sb_bank_bits(rank_addr, 6, 7, bank_xor_enable, 20, 21); 2006 } else { 2007 row = sb_bits(rank_addr, rowbits, sb_open_row); 2008 if (amap_fine) 2009 col = sb_bits(rank_addr, colbits, sb_open_fine_column); 2010 else 2011 col = sb_bits(rank_addr, colbits, sb_open_column); 2012 bank_address = sb_bank_bits(rank_addr, 18, 19, bank_xor_enable, 22, 23); 2013 bank_group = sb_bank_bits(rank_addr, bg0, 17, bank_xor_enable, 20, 21); 2014 } 2015 2016 row &= (1u << rowbits) - 1; 2017 2018 sprintf(msg, "row:0x%x col:0x%x bank_addr:%d bank_group:%d", 2019 row, col, bank_address, bank_group); 2020 return true; 2021 } 2022 sb_decode_ddr3(struct mem_ctl_info * mci,int ch,u8 rank,u64 rank_addr,char * msg)2023 static bool sb_decode_ddr3(struct mem_ctl_info *mci, int ch, u8 rank, 2024 u64 rank_addr, char *msg) 2025 { 2026 pr_warn_once("DDR3 row/column decode not support yet!\n"); 2027 msg[0] = '\0'; 2028 return false; 2029 } 2030 get_memory_error_data(struct mem_ctl_info * mci,u64 addr,u8 * socket,u8 * ha,long * channel_mask,u8 * rank,char ** area_type,char * msg)2031 static int get_memory_error_data(struct mem_ctl_info *mci, 2032 u64 addr, 2033 u8 *socket, u8 *ha, 2034 long *channel_mask, 2035 u8 *rank, 2036 char **area_type, char *msg) 2037 { 2038 struct mem_ctl_info *new_mci; 2039 struct sbridge_pvt *pvt = mci->pvt_info; 2040 struct pci_dev *pci_ha; 2041 int n_rir, n_sads, n_tads, sad_way, sck_xch; 2042 int sad_interl, idx, base_ch; 2043 int interleave_mode, shiftup = 0; 2044 unsigned int sad_interleave[MAX_INTERLEAVE]; 2045 u32 reg, dram_rule; 2046 u8 ch_way, sck_way, pkg, sad_ha = 0, rankid = 0; 2047 u32 tad_offset; 2048 u32 rir_way; 2049 u32 mb, gb; 2050 u64 ch_addr, offset, limit = 0, prv = 0; 2051 u64 rank_addr; 2052 enum mem_type mtype; 2053 2054 /* 2055 * Step 0) Check if the address is at special memory ranges 2056 * The check bellow is probably enough to fill all cases where 2057 * the error is not inside a memory, except for the legacy 2058 * range (e. g. VGA addresses). It is unlikely, however, that the 2059 * memory controller would generate an error on that range. 2060 */ 2061 if ((addr > (u64) pvt->tolm) && (addr < (1LL << 32))) { 2062 sprintf(msg, "Error at TOLM area, on addr 0x%08Lx", addr); 2063 return -EINVAL; 2064 } 2065 if (addr >= (u64)pvt->tohm) { 2066 sprintf(msg, "Error at MMIOH area, on addr 0x%016Lx", addr); 2067 return -EINVAL; 2068 } 2069 2070 /* 2071 * Step 1) Get socket 2072 */ 2073 for (n_sads = 0; n_sads < pvt->info.max_sad; n_sads++) { 2074 pci_read_config_dword(pvt->pci_sad0, pvt->info.dram_rule[n_sads], 2075 ®); 2076 2077 if (!DRAM_RULE_ENABLE(reg)) 2078 continue; 2079 2080 limit = pvt->info.sad_limit(reg); 2081 if (limit <= prv) { 2082 sprintf(msg, "Can't discover the memory socket"); 2083 return -EINVAL; 2084 } 2085 if (addr <= limit) 2086 break; 2087 prv = limit; 2088 } 2089 if (n_sads == pvt->info.max_sad) { 2090 sprintf(msg, "Can't discover the memory socket"); 2091 return -EINVAL; 2092 } 2093 dram_rule = reg; 2094 *area_type = show_dram_attr(pvt->info.dram_attr(dram_rule)); 2095 interleave_mode = pvt->info.interleave_mode(dram_rule); 2096 2097 pci_read_config_dword(pvt->pci_sad0, pvt->info.interleave_list[n_sads], 2098 ®); 2099 2100 if (pvt->info.type == SANDY_BRIDGE) { 2101 sad_interl = sad_pkg(pvt->info.interleave_pkg, reg, 0); 2102 for (sad_way = 0; sad_way < 8; sad_way++) { 2103 u32 pkg = sad_pkg(pvt->info.interleave_pkg, reg, sad_way); 2104 if (sad_way > 0 && sad_interl == pkg) 2105 break; 2106 sad_interleave[sad_way] = pkg; 2107 edac_dbg(0, "SAD interleave #%d: %d\n", 2108 sad_way, sad_interleave[sad_way]); 2109 } 2110 edac_dbg(0, "mc#%d: Error detected on SAD#%d: address 0x%016Lx < 0x%016Lx, Interleave [%d:6]%s\n", 2111 pvt->sbridge_dev->mc, 2112 n_sads, 2113 addr, 2114 limit, 2115 sad_way + 7, 2116 !interleave_mode ? "" : "XOR[18:16]"); 2117 if (interleave_mode) 2118 idx = ((addr >> 6) ^ (addr >> 16)) & 7; 2119 else 2120 idx = (addr >> 6) & 7; 2121 switch (sad_way) { 2122 case 1: 2123 idx = 0; 2124 break; 2125 case 2: 2126 idx = idx & 1; 2127 break; 2128 case 4: 2129 idx = idx & 3; 2130 break; 2131 case 8: 2132 break; 2133 default: 2134 sprintf(msg, "Can't discover socket interleave"); 2135 return -EINVAL; 2136 } 2137 *socket = sad_interleave[idx]; 2138 edac_dbg(0, "SAD interleave index: %d (wayness %d) = CPU socket %d\n", 2139 idx, sad_way, *socket); 2140 } else if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL) { 2141 int bits, a7mode = A7MODE(dram_rule); 2142 2143 if (a7mode) { 2144 /* A7 mode swaps P9 with P6 */ 2145 bits = GET_BITFIELD(addr, 7, 8) << 1; 2146 bits |= GET_BITFIELD(addr, 9, 9); 2147 } else 2148 bits = GET_BITFIELD(addr, 6, 8); 2149 2150 if (interleave_mode == 0) { 2151 /* interleave mode will XOR {8,7,6} with {18,17,16} */ 2152 idx = GET_BITFIELD(addr, 16, 18); 2153 idx ^= bits; 2154 } else 2155 idx = bits; 2156 2157 pkg = sad_pkg(pvt->info.interleave_pkg, reg, idx); 2158 *socket = sad_pkg_socket(pkg); 2159 sad_ha = sad_pkg_ha(pkg); 2160 2161 if (a7mode) { 2162 /* MCChanShiftUpEnable */ 2163 pci_read_config_dword(pvt->pci_ha, HASWELL_HASYSDEFEATURE2, ®); 2164 shiftup = GET_BITFIELD(reg, 22, 22); 2165 } 2166 2167 edac_dbg(0, "SAD interleave package: %d = CPU socket %d, HA %i, shiftup: %i\n", 2168 idx, *socket, sad_ha, shiftup); 2169 } else { 2170 /* Ivy Bridge's SAD mode doesn't support XOR interleave mode */ 2171 idx = (addr >> 6) & 7; 2172 pkg = sad_pkg(pvt->info.interleave_pkg, reg, idx); 2173 *socket = sad_pkg_socket(pkg); 2174 sad_ha = sad_pkg_ha(pkg); 2175 edac_dbg(0, "SAD interleave package: %d = CPU socket %d, HA %d\n", 2176 idx, *socket, sad_ha); 2177 } 2178 2179 *ha = sad_ha; 2180 2181 /* 2182 * Move to the proper node structure, in order to access the 2183 * right PCI registers 2184 */ 2185 new_mci = get_mci_for_node_id(*socket, sad_ha); 2186 if (!new_mci) { 2187 sprintf(msg, "Struct for socket #%u wasn't initialized", 2188 *socket); 2189 return -EINVAL; 2190 } 2191 mci = new_mci; 2192 pvt = mci->pvt_info; 2193 2194 /* 2195 * Step 2) Get memory channel 2196 */ 2197 prv = 0; 2198 pci_ha = pvt->pci_ha; 2199 for (n_tads = 0; n_tads < MAX_TAD; n_tads++) { 2200 pci_read_config_dword(pci_ha, tad_dram_rule[n_tads], ®); 2201 limit = TAD_LIMIT(reg); 2202 if (limit <= prv) { 2203 sprintf(msg, "Can't discover the memory channel"); 2204 return -EINVAL; 2205 } 2206 if (addr <= limit) 2207 break; 2208 prv = limit; 2209 } 2210 if (n_tads == MAX_TAD) { 2211 sprintf(msg, "Can't discover the memory channel"); 2212 return -EINVAL; 2213 } 2214 2215 ch_way = TAD_CH(reg) + 1; 2216 sck_way = TAD_SOCK(reg); 2217 2218 if (ch_way == 3) 2219 idx = addr >> 6; 2220 else { 2221 idx = (addr >> (6 + sck_way + shiftup)) & 0x3; 2222 if (pvt->is_chan_hash) 2223 idx = haswell_chan_hash(idx, addr); 2224 } 2225 idx = idx % ch_way; 2226 2227 /* 2228 * FIXME: Shouldn't we use CHN_IDX_OFFSET() here, when ch_way == 3 ??? 2229 */ 2230 switch (idx) { 2231 case 0: 2232 base_ch = TAD_TGT0(reg); 2233 break; 2234 case 1: 2235 base_ch = TAD_TGT1(reg); 2236 break; 2237 case 2: 2238 base_ch = TAD_TGT2(reg); 2239 break; 2240 case 3: 2241 base_ch = TAD_TGT3(reg); 2242 break; 2243 default: 2244 sprintf(msg, "Can't discover the TAD target"); 2245 return -EINVAL; 2246 } 2247 *channel_mask = 1 << base_ch; 2248 2249 pci_read_config_dword(pvt->pci_tad[base_ch], tad_ch_nilv_offset[n_tads], &tad_offset); 2250 2251 if (pvt->mirror_mode == FULL_MIRRORING || 2252 (pvt->mirror_mode == ADDR_RANGE_MIRRORING && n_tads == 0)) { 2253 *channel_mask |= 1 << ((base_ch + 2) % 4); 2254 switch(ch_way) { 2255 case 2: 2256 case 4: 2257 sck_xch = (1 << sck_way) * (ch_way >> 1); 2258 break; 2259 default: 2260 sprintf(msg, "Invalid mirror set. Can't decode addr"); 2261 return -EINVAL; 2262 } 2263 2264 pvt->is_cur_addr_mirrored = true; 2265 } else { 2266 sck_xch = (1 << sck_way) * ch_way; 2267 pvt->is_cur_addr_mirrored = false; 2268 } 2269 2270 if (pvt->is_lockstep) 2271 *channel_mask |= 1 << ((base_ch + 1) % 4); 2272 2273 offset = TAD_OFFSET(tad_offset); 2274 2275 edac_dbg(0, "TAD#%d: address 0x%016Lx < 0x%016Lx, socket interleave %d, channel interleave %d (offset 0x%08Lx), index %d, base ch: %d, ch mask: 0x%02lx\n", 2276 n_tads, 2277 addr, 2278 limit, 2279 sck_way, 2280 ch_way, 2281 offset, 2282 idx, 2283 base_ch, 2284 *channel_mask); 2285 2286 /* Calculate channel address */ 2287 /* Remove the TAD offset */ 2288 2289 if (offset > addr) { 2290 sprintf(msg, "Can't calculate ch addr: TAD offset 0x%08Lx is too high for addr 0x%08Lx!", 2291 offset, addr); 2292 return -EINVAL; 2293 } 2294 2295 ch_addr = addr - offset; 2296 ch_addr >>= (6 + shiftup); 2297 ch_addr /= sck_xch; 2298 ch_addr <<= (6 + shiftup); 2299 ch_addr |= addr & ((1 << (6 + shiftup)) - 1); 2300 2301 /* 2302 * Step 3) Decode rank 2303 */ 2304 for (n_rir = 0; n_rir < MAX_RIR_RANGES; n_rir++) { 2305 pci_read_config_dword(pvt->pci_tad[base_ch], rir_way_limit[n_rir], ®); 2306 2307 if (!IS_RIR_VALID(reg)) 2308 continue; 2309 2310 limit = pvt->info.rir_limit(reg); 2311 gb = div_u64_rem(limit >> 20, 1024, &mb); 2312 edac_dbg(0, "RIR#%d, limit: %u.%03u GB (0x%016Lx), way: %d\n", 2313 n_rir, 2314 gb, (mb*1000)/1024, 2315 limit, 2316 1 << RIR_WAY(reg)); 2317 if (ch_addr <= limit) 2318 break; 2319 } 2320 if (n_rir == MAX_RIR_RANGES) { 2321 sprintf(msg, "Can't discover the memory rank for ch addr 0x%08Lx", 2322 ch_addr); 2323 return -EINVAL; 2324 } 2325 rir_way = RIR_WAY(reg); 2326 2327 if (pvt->is_close_pg) 2328 idx = (ch_addr >> 6); 2329 else 2330 idx = (ch_addr >> 13); /* FIXME: Datasheet says to shift by 15 */ 2331 idx %= 1 << rir_way; 2332 2333 pci_read_config_dword(pvt->pci_tad[base_ch], rir_offset[n_rir][idx], ®); 2334 *rank = RIR_RNK_TGT(pvt->info.type, reg); 2335 2336 if (pvt->info.type == BROADWELL) { 2337 if (pvt->is_close_pg) 2338 shiftup = 6; 2339 else 2340 shiftup = 13; 2341 2342 rank_addr = ch_addr >> shiftup; 2343 rank_addr /= (1 << rir_way); 2344 rank_addr <<= shiftup; 2345 rank_addr |= ch_addr & GENMASK_ULL(shiftup - 1, 0); 2346 rank_addr -= RIR_OFFSET(pvt->info.type, reg); 2347 2348 mtype = pvt->info.get_memory_type(pvt); 2349 rankid = *rank; 2350 if (mtype == MEM_DDR4 || mtype == MEM_RDDR4) 2351 sb_decode_ddr4(mci, base_ch, rankid, rank_addr, msg); 2352 else 2353 sb_decode_ddr3(mci, base_ch, rankid, rank_addr, msg); 2354 } else { 2355 msg[0] = '\0'; 2356 } 2357 2358 edac_dbg(0, "RIR#%d: channel address 0x%08Lx < 0x%08Lx, RIR interleave %d, index %d\n", 2359 n_rir, 2360 ch_addr, 2361 limit, 2362 rir_way, 2363 idx); 2364 2365 return 0; 2366 } 2367 get_memory_error_data_from_mce(struct mem_ctl_info * mci,const struct mce * m,u8 * socket,u8 * ha,long * channel_mask,char * msg)2368 static int get_memory_error_data_from_mce(struct mem_ctl_info *mci, 2369 const struct mce *m, u8 *socket, 2370 u8 *ha, long *channel_mask, 2371 char *msg) 2372 { 2373 u32 reg, channel = GET_BITFIELD(m->status, 0, 3); 2374 struct mem_ctl_info *new_mci; 2375 struct sbridge_pvt *pvt; 2376 struct pci_dev *pci_ha; 2377 bool tad0; 2378 2379 if (channel >= NUM_CHANNELS) { 2380 sprintf(msg, "Invalid channel 0x%x", channel); 2381 return -EINVAL; 2382 } 2383 2384 pvt = mci->pvt_info; 2385 if (!pvt->info.get_ha) { 2386 sprintf(msg, "No get_ha()"); 2387 return -EINVAL; 2388 } 2389 *ha = pvt->info.get_ha(m->bank); 2390 if (*ha != 0 && *ha != 1) { 2391 sprintf(msg, "Impossible bank %d", m->bank); 2392 return -EINVAL; 2393 } 2394 2395 *socket = m->socketid; 2396 new_mci = get_mci_for_node_id(*socket, *ha); 2397 if (!new_mci) { 2398 strcpy(msg, "mci socket got corrupted!"); 2399 return -EINVAL; 2400 } 2401 2402 pvt = new_mci->pvt_info; 2403 pci_ha = pvt->pci_ha; 2404 pci_read_config_dword(pci_ha, tad_dram_rule[0], ®); 2405 tad0 = m->addr <= TAD_LIMIT(reg); 2406 2407 *channel_mask = 1 << channel; 2408 if (pvt->mirror_mode == FULL_MIRRORING || 2409 (pvt->mirror_mode == ADDR_RANGE_MIRRORING && tad0)) { 2410 *channel_mask |= 1 << ((channel + 2) % 4); 2411 pvt->is_cur_addr_mirrored = true; 2412 } else { 2413 pvt->is_cur_addr_mirrored = false; 2414 } 2415 2416 if (pvt->is_lockstep) 2417 *channel_mask |= 1 << ((channel + 1) % 4); 2418 2419 return 0; 2420 } 2421 2422 /**************************************************************************** 2423 Device initialization routines: put/get, init/exit 2424 ****************************************************************************/ 2425 2426 /* 2427 * sbridge_put_all_devices 'put' all the devices that we have 2428 * reserved via 'get' 2429 */ sbridge_put_devices(struct sbridge_dev * sbridge_dev)2430 static void sbridge_put_devices(struct sbridge_dev *sbridge_dev) 2431 { 2432 int i; 2433 2434 edac_dbg(0, "\n"); 2435 for (i = 0; i < sbridge_dev->n_devs; i++) { 2436 struct pci_dev *pdev = sbridge_dev->pdev[i]; 2437 if (!pdev) 2438 continue; 2439 edac_dbg(0, "Removing dev %02x:%02x.%d\n", 2440 pdev->bus->number, 2441 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); 2442 pci_dev_put(pdev); 2443 } 2444 } 2445 sbridge_put_all_devices(void)2446 static void sbridge_put_all_devices(void) 2447 { 2448 struct sbridge_dev *sbridge_dev, *tmp; 2449 2450 list_for_each_entry_safe(sbridge_dev, tmp, &sbridge_edac_list, list) { 2451 sbridge_put_devices(sbridge_dev); 2452 free_sbridge_dev(sbridge_dev); 2453 } 2454 } 2455 sbridge_get_onedevice(struct pci_dev ** prev,u8 * num_mc,const struct pci_id_table * table,const unsigned devno,const int multi_bus)2456 static int sbridge_get_onedevice(struct pci_dev **prev, 2457 u8 *num_mc, 2458 const struct pci_id_table *table, 2459 const unsigned devno, 2460 const int multi_bus) 2461 { 2462 struct sbridge_dev *sbridge_dev = NULL; 2463 const struct pci_id_descr *dev_descr = &table->descr[devno]; 2464 struct pci_dev *pdev = NULL; 2465 int seg = 0; 2466 u8 bus = 0; 2467 int i = 0; 2468 2469 sbridge_printk(KERN_DEBUG, 2470 "Seeking for: PCI ID %04x:%04x\n", 2471 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2472 2473 pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 2474 dev_descr->dev_id, *prev); 2475 2476 if (!pdev) { 2477 if (*prev) { 2478 *prev = pdev; 2479 return 0; 2480 } 2481 2482 if (dev_descr->optional) 2483 return 0; 2484 2485 /* if the HA wasn't found */ 2486 if (devno == 0) 2487 return -ENODEV; 2488 2489 sbridge_printk(KERN_INFO, 2490 "Device not found: %04x:%04x\n", 2491 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2492 2493 /* End of list, leave */ 2494 return -ENODEV; 2495 } 2496 seg = pci_domain_nr(pdev->bus); 2497 bus = pdev->bus->number; 2498 2499 next_imc: 2500 sbridge_dev = get_sbridge_dev(seg, bus, dev_descr->dom, 2501 multi_bus, sbridge_dev); 2502 if (!sbridge_dev) { 2503 /* If the HA1 wasn't found, don't create EDAC second memory controller */ 2504 if (dev_descr->dom == IMC1 && devno != 1) { 2505 edac_dbg(0, "Skip IMC1: %04x:%04x (since HA1 was absent)\n", 2506 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2507 pci_dev_put(pdev); 2508 return 0; 2509 } 2510 2511 if (dev_descr->dom == SOCK) 2512 goto out_imc; 2513 2514 sbridge_dev = alloc_sbridge_dev(seg, bus, dev_descr->dom, table); 2515 if (!sbridge_dev) { 2516 pci_dev_put(pdev); 2517 return -ENOMEM; 2518 } 2519 (*num_mc)++; 2520 } 2521 2522 if (sbridge_dev->pdev[sbridge_dev->i_devs]) { 2523 sbridge_printk(KERN_ERR, 2524 "Duplicated device for %04x:%04x\n", 2525 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2526 pci_dev_put(pdev); 2527 return -ENODEV; 2528 } 2529 2530 sbridge_dev->pdev[sbridge_dev->i_devs++] = pdev; 2531 2532 /* pdev belongs to more than one IMC, do extra gets */ 2533 if (++i > 1) 2534 pci_dev_get(pdev); 2535 2536 if (dev_descr->dom == SOCK && i < table->n_imcs_per_sock) 2537 goto next_imc; 2538 2539 out_imc: 2540 /* Be sure that the device is enabled */ 2541 if (unlikely(pci_enable_device(pdev) < 0)) { 2542 sbridge_printk(KERN_ERR, 2543 "Couldn't enable %04x:%04x\n", 2544 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2545 return -ENODEV; 2546 } 2547 2548 edac_dbg(0, "Detected %04x:%04x\n", 2549 PCI_VENDOR_ID_INTEL, dev_descr->dev_id); 2550 2551 /* 2552 * As stated on drivers/pci/search.c, the reference count for 2553 * @from is always decremented if it is not %NULL. So, as we need 2554 * to get all devices up to null, we need to do a get for the device 2555 */ 2556 pci_dev_get(pdev); 2557 2558 *prev = pdev; 2559 2560 return 0; 2561 } 2562 2563 /* 2564 * sbridge_get_all_devices - Find and perform 'get' operation on the MCH's 2565 * devices we want to reference for this driver. 2566 * @num_mc: pointer to the memory controllers count, to be incremented in case 2567 * of success. 2568 * @table: model specific table 2569 * 2570 * returns 0 in case of success or error code 2571 */ sbridge_get_all_devices(u8 * num_mc,const struct pci_id_table * table)2572 static int sbridge_get_all_devices(u8 *num_mc, 2573 const struct pci_id_table *table) 2574 { 2575 int i, rc; 2576 struct pci_dev *pdev = NULL; 2577 int allow_dups = 0; 2578 int multi_bus = 0; 2579 2580 if (table->type == KNIGHTS_LANDING) 2581 allow_dups = multi_bus = 1; 2582 while (table && table->descr) { 2583 for (i = 0; i < table->n_devs_per_sock; i++) { 2584 if (!allow_dups || i == 0 || 2585 table->descr[i].dev_id != 2586 table->descr[i-1].dev_id) { 2587 pdev = NULL; 2588 } 2589 do { 2590 rc = sbridge_get_onedevice(&pdev, num_mc, 2591 table, i, multi_bus); 2592 if (rc < 0) { 2593 if (i == 0) { 2594 i = table->n_devs_per_sock; 2595 break; 2596 } 2597 sbridge_put_all_devices(); 2598 return -ENODEV; 2599 } 2600 } while (pdev && !allow_dups); 2601 } 2602 table++; 2603 } 2604 2605 return 0; 2606 } 2607 2608 /* 2609 * Device IDs for {SBRIDGE,IBRIDGE,HASWELL,BROADWELL}_IMC_HA0_TAD0 are in 2610 * the format: XXXa. So we can convert from a device to the corresponding 2611 * channel like this 2612 */ 2613 #define TAD_DEV_TO_CHAN(dev) (((dev) & 0xf) - 0xa) 2614 sbridge_mci_bind_devs(struct mem_ctl_info * mci,struct sbridge_dev * sbridge_dev)2615 static int sbridge_mci_bind_devs(struct mem_ctl_info *mci, 2616 struct sbridge_dev *sbridge_dev) 2617 { 2618 struct sbridge_pvt *pvt = mci->pvt_info; 2619 struct pci_dev *pdev; 2620 u8 saw_chan_mask = 0; 2621 int i; 2622 2623 for (i = 0; i < sbridge_dev->n_devs; i++) { 2624 pdev = sbridge_dev->pdev[i]; 2625 if (!pdev) 2626 continue; 2627 2628 switch (pdev->device) { 2629 case PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0: 2630 pvt->pci_sad0 = pdev; 2631 break; 2632 case PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1: 2633 pvt->pci_sad1 = pdev; 2634 break; 2635 case PCI_DEVICE_ID_INTEL_SBRIDGE_BR: 2636 pvt->pci_br0 = pdev; 2637 break; 2638 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0: 2639 pvt->pci_ha = pdev; 2640 break; 2641 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA: 2642 pvt->pci_ta = pdev; 2643 break; 2644 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS: 2645 pvt->pci_ras = pdev; 2646 break; 2647 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0: 2648 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1: 2649 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2: 2650 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3: 2651 { 2652 int id = TAD_DEV_TO_CHAN(pdev->device); 2653 pvt->pci_tad[id] = pdev; 2654 saw_chan_mask |= 1 << id; 2655 } 2656 break; 2657 case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO: 2658 pvt->pci_ddrio = pdev; 2659 break; 2660 default: 2661 goto error; 2662 } 2663 2664 edac_dbg(0, "Associated PCI %02x:%02x, bus %d with dev = %p\n", 2665 pdev->vendor, pdev->device, 2666 sbridge_dev->bus, 2667 pdev); 2668 } 2669 2670 /* Check if everything were registered */ 2671 if (!pvt->pci_sad0 || !pvt->pci_sad1 || !pvt->pci_ha || 2672 !pvt->pci_ras || !pvt->pci_ta) 2673 goto enodev; 2674 2675 if (saw_chan_mask != 0x0f) 2676 goto enodev; 2677 return 0; 2678 2679 enodev: 2680 sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); 2681 return -ENODEV; 2682 2683 error: 2684 sbridge_printk(KERN_ERR, "Unexpected device %02x:%02x\n", 2685 PCI_VENDOR_ID_INTEL, pdev->device); 2686 return -EINVAL; 2687 } 2688 ibridge_mci_bind_devs(struct mem_ctl_info * mci,struct sbridge_dev * sbridge_dev)2689 static int ibridge_mci_bind_devs(struct mem_ctl_info *mci, 2690 struct sbridge_dev *sbridge_dev) 2691 { 2692 struct sbridge_pvt *pvt = mci->pvt_info; 2693 struct pci_dev *pdev; 2694 u8 saw_chan_mask = 0; 2695 int i; 2696 2697 for (i = 0; i < sbridge_dev->n_devs; i++) { 2698 pdev = sbridge_dev->pdev[i]; 2699 if (!pdev) 2700 continue; 2701 2702 switch (pdev->device) { 2703 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0: 2704 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1: 2705 pvt->pci_ha = pdev; 2706 break; 2707 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA: 2708 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TA: 2709 pvt->pci_ta = pdev; 2710 break; 2711 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS: 2712 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_RAS: 2713 pvt->pci_ras = pdev; 2714 break; 2715 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0: 2716 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1: 2717 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2: 2718 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3: 2719 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0: 2720 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1: 2721 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD2: 2722 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD3: 2723 { 2724 int id = TAD_DEV_TO_CHAN(pdev->device); 2725 pvt->pci_tad[id] = pdev; 2726 saw_chan_mask |= 1 << id; 2727 } 2728 break; 2729 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0: 2730 pvt->pci_ddrio = pdev; 2731 break; 2732 case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0: 2733 pvt->pci_ddrio = pdev; 2734 break; 2735 case PCI_DEVICE_ID_INTEL_IBRIDGE_SAD: 2736 pvt->pci_sad0 = pdev; 2737 break; 2738 case PCI_DEVICE_ID_INTEL_IBRIDGE_BR0: 2739 pvt->pci_br0 = pdev; 2740 break; 2741 case PCI_DEVICE_ID_INTEL_IBRIDGE_BR1: 2742 pvt->pci_br1 = pdev; 2743 break; 2744 default: 2745 goto error; 2746 } 2747 2748 edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", 2749 sbridge_dev->bus, 2750 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2751 pdev); 2752 } 2753 2754 /* Check if everything were registered */ 2755 if (!pvt->pci_sad0 || !pvt->pci_ha || !pvt->pci_br0 || 2756 !pvt->pci_br1 || !pvt->pci_ras || !pvt->pci_ta) 2757 goto enodev; 2758 2759 if (saw_chan_mask != 0x0f && /* -EN/-EX */ 2760 saw_chan_mask != 0x03) /* -EP */ 2761 goto enodev; 2762 return 0; 2763 2764 enodev: 2765 sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); 2766 return -ENODEV; 2767 2768 error: 2769 sbridge_printk(KERN_ERR, 2770 "Unexpected device %02x:%02x\n", PCI_VENDOR_ID_INTEL, 2771 pdev->device); 2772 return -EINVAL; 2773 } 2774 haswell_mci_bind_devs(struct mem_ctl_info * mci,struct sbridge_dev * sbridge_dev)2775 static int haswell_mci_bind_devs(struct mem_ctl_info *mci, 2776 struct sbridge_dev *sbridge_dev) 2777 { 2778 struct sbridge_pvt *pvt = mci->pvt_info; 2779 struct pci_dev *pdev; 2780 u8 saw_chan_mask = 0; 2781 int i; 2782 2783 /* there's only one device per system; not tied to any bus */ 2784 if (pvt->info.pci_vtd == NULL) 2785 /* result will be checked later */ 2786 pvt->info.pci_vtd = pci_get_device(PCI_VENDOR_ID_INTEL, 2787 PCI_DEVICE_ID_INTEL_HASWELL_IMC_VTD_MISC, 2788 NULL); 2789 2790 for (i = 0; i < sbridge_dev->n_devs; i++) { 2791 pdev = sbridge_dev->pdev[i]; 2792 if (!pdev) 2793 continue; 2794 2795 switch (pdev->device) { 2796 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0: 2797 pvt->pci_sad0 = pdev; 2798 break; 2799 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1: 2800 pvt->pci_sad1 = pdev; 2801 break; 2802 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0: 2803 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1: 2804 pvt->pci_ha = pdev; 2805 break; 2806 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA: 2807 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA: 2808 pvt->pci_ta = pdev; 2809 break; 2810 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TM: 2811 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TM: 2812 pvt->pci_ras = pdev; 2813 break; 2814 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0: 2815 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1: 2816 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2: 2817 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3: 2818 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0: 2819 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1: 2820 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD2: 2821 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD3: 2822 { 2823 int id = TAD_DEV_TO_CHAN(pdev->device); 2824 pvt->pci_tad[id] = pdev; 2825 saw_chan_mask |= 1 << id; 2826 } 2827 break; 2828 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0: 2829 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO1: 2830 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO2: 2831 case PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO3: 2832 if (!pvt->pci_ddrio) 2833 pvt->pci_ddrio = pdev; 2834 break; 2835 default: 2836 break; 2837 } 2838 2839 edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", 2840 sbridge_dev->bus, 2841 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2842 pdev); 2843 } 2844 2845 /* Check if everything were registered */ 2846 if (!pvt->pci_sad0 || !pvt->pci_ha || !pvt->pci_sad1 || 2847 !pvt->pci_ras || !pvt->pci_ta || !pvt->info.pci_vtd) 2848 goto enodev; 2849 2850 if (saw_chan_mask != 0x0f && /* -EN/-EX */ 2851 saw_chan_mask != 0x03) /* -EP */ 2852 goto enodev; 2853 return 0; 2854 2855 enodev: 2856 sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); 2857 return -ENODEV; 2858 } 2859 broadwell_mci_bind_devs(struct mem_ctl_info * mci,struct sbridge_dev * sbridge_dev)2860 static int broadwell_mci_bind_devs(struct mem_ctl_info *mci, 2861 struct sbridge_dev *sbridge_dev) 2862 { 2863 struct sbridge_pvt *pvt = mci->pvt_info; 2864 struct pci_dev *pdev; 2865 u8 saw_chan_mask = 0; 2866 int i; 2867 2868 /* there's only one device per system; not tied to any bus */ 2869 if (pvt->info.pci_vtd == NULL) 2870 /* result will be checked later */ 2871 pvt->info.pci_vtd = pci_get_device(PCI_VENDOR_ID_INTEL, 2872 PCI_DEVICE_ID_INTEL_BROADWELL_IMC_VTD_MISC, 2873 NULL); 2874 2875 for (i = 0; i < sbridge_dev->n_devs; i++) { 2876 pdev = sbridge_dev->pdev[i]; 2877 if (!pdev) 2878 continue; 2879 2880 switch (pdev->device) { 2881 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0: 2882 pvt->pci_sad0 = pdev; 2883 break; 2884 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1: 2885 pvt->pci_sad1 = pdev; 2886 break; 2887 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0: 2888 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1: 2889 pvt->pci_ha = pdev; 2890 break; 2891 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA: 2892 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TA: 2893 pvt->pci_ta = pdev; 2894 break; 2895 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TM: 2896 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TM: 2897 pvt->pci_ras = pdev; 2898 break; 2899 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0: 2900 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1: 2901 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2: 2902 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3: 2903 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD0: 2904 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD1: 2905 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD2: 2906 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA1_TAD3: 2907 { 2908 int id = TAD_DEV_TO_CHAN(pdev->device); 2909 pvt->pci_tad[id] = pdev; 2910 saw_chan_mask |= 1 << id; 2911 } 2912 break; 2913 case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0: 2914 pvt->pci_ddrio = pdev; 2915 break; 2916 default: 2917 break; 2918 } 2919 2920 edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", 2921 sbridge_dev->bus, 2922 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2923 pdev); 2924 } 2925 2926 /* Check if everything were registered */ 2927 if (!pvt->pci_sad0 || !pvt->pci_ha || !pvt->pci_sad1 || 2928 !pvt->pci_ras || !pvt->pci_ta || !pvt->info.pci_vtd) 2929 goto enodev; 2930 2931 if (saw_chan_mask != 0x0f && /* -EN/-EX */ 2932 saw_chan_mask != 0x03) /* -EP */ 2933 goto enodev; 2934 return 0; 2935 2936 enodev: 2937 sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); 2938 return -ENODEV; 2939 } 2940 knl_mci_bind_devs(struct mem_ctl_info * mci,struct sbridge_dev * sbridge_dev)2941 static int knl_mci_bind_devs(struct mem_ctl_info *mci, 2942 struct sbridge_dev *sbridge_dev) 2943 { 2944 struct sbridge_pvt *pvt = mci->pvt_info; 2945 struct pci_dev *pdev; 2946 int dev, func; 2947 2948 int i; 2949 int devidx; 2950 2951 for (i = 0; i < sbridge_dev->n_devs; i++) { 2952 pdev = sbridge_dev->pdev[i]; 2953 if (!pdev) 2954 continue; 2955 2956 /* Extract PCI device and function. */ 2957 dev = (pdev->devfn >> 3) & 0x1f; 2958 func = pdev->devfn & 0x7; 2959 2960 switch (pdev->device) { 2961 case PCI_DEVICE_ID_INTEL_KNL_IMC_MC: 2962 if (dev == 8) 2963 pvt->knl.pci_mc0 = pdev; 2964 else if (dev == 9) 2965 pvt->knl.pci_mc1 = pdev; 2966 else { 2967 sbridge_printk(KERN_ERR, 2968 "Memory controller in unexpected place! (dev %d, fn %d)\n", 2969 dev, func); 2970 continue; 2971 } 2972 break; 2973 2974 case PCI_DEVICE_ID_INTEL_KNL_IMC_SAD0: 2975 pvt->pci_sad0 = pdev; 2976 break; 2977 2978 case PCI_DEVICE_ID_INTEL_KNL_IMC_SAD1: 2979 pvt->pci_sad1 = pdev; 2980 break; 2981 2982 case PCI_DEVICE_ID_INTEL_KNL_IMC_CHA: 2983 /* There are one of these per tile, and range from 2984 * 1.14.0 to 1.18.5. 2985 */ 2986 devidx = ((dev-14)*8)+func; 2987 2988 if (devidx < 0 || devidx >= KNL_MAX_CHAS) { 2989 sbridge_printk(KERN_ERR, 2990 "Caching and Home Agent in unexpected place! (dev %d, fn %d)\n", 2991 dev, func); 2992 continue; 2993 } 2994 2995 WARN_ON(pvt->knl.pci_cha[devidx] != NULL); 2996 2997 pvt->knl.pci_cha[devidx] = pdev; 2998 break; 2999 3000 case PCI_DEVICE_ID_INTEL_KNL_IMC_CHAN: 3001 devidx = -1; 3002 3003 /* 3004 * MC0 channels 0-2 are device 9 function 2-4, 3005 * MC1 channels 3-5 are device 8 function 2-4. 3006 */ 3007 3008 if (dev == 9) 3009 devidx = func-2; 3010 else if (dev == 8) 3011 devidx = 3 + (func-2); 3012 3013 if (devidx < 0 || devidx >= KNL_MAX_CHANNELS) { 3014 sbridge_printk(KERN_ERR, 3015 "DRAM Channel Registers in unexpected place! (dev %d, fn %d)\n", 3016 dev, func); 3017 continue; 3018 } 3019 3020 WARN_ON(pvt->knl.pci_channel[devidx] != NULL); 3021 pvt->knl.pci_channel[devidx] = pdev; 3022 break; 3023 3024 case PCI_DEVICE_ID_INTEL_KNL_IMC_TOLHM: 3025 pvt->knl.pci_mc_info = pdev; 3026 break; 3027 3028 case PCI_DEVICE_ID_INTEL_KNL_IMC_TA: 3029 pvt->pci_ta = pdev; 3030 break; 3031 3032 default: 3033 sbridge_printk(KERN_ERR, "Unexpected device %d\n", 3034 pdev->device); 3035 break; 3036 } 3037 } 3038 3039 if (!pvt->knl.pci_mc0 || !pvt->knl.pci_mc1 || 3040 !pvt->pci_sad0 || !pvt->pci_sad1 || 3041 !pvt->pci_ta) { 3042 goto enodev; 3043 } 3044 3045 for (i = 0; i < KNL_MAX_CHANNELS; i++) { 3046 if (!pvt->knl.pci_channel[i]) { 3047 sbridge_printk(KERN_ERR, "Missing channel %d\n", i); 3048 goto enodev; 3049 } 3050 } 3051 3052 for (i = 0; i < KNL_MAX_CHAS; i++) { 3053 if (!pvt->knl.pci_cha[i]) { 3054 sbridge_printk(KERN_ERR, "Missing CHA %d\n", i); 3055 goto enodev; 3056 } 3057 } 3058 3059 return 0; 3060 3061 enodev: 3062 sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); 3063 return -ENODEV; 3064 } 3065 3066 /**************************************************************************** 3067 Error check routines 3068 ****************************************************************************/ 3069 3070 /* 3071 * While Sandy Bridge has error count registers, SMI BIOS read values from 3072 * and resets the counters. So, they are not reliable for the OS to read 3073 * from them. So, we have no option but to just trust on whatever MCE is 3074 * telling us about the errors. 3075 */ sbridge_mce_output_error(struct mem_ctl_info * mci,const struct mce * m)3076 static void sbridge_mce_output_error(struct mem_ctl_info *mci, 3077 const struct mce *m) 3078 { 3079 struct mem_ctl_info *new_mci; 3080 struct sbridge_pvt *pvt = mci->pvt_info; 3081 enum hw_event_mc_err_type tp_event; 3082 char *optype, msg[256], msg_full[512]; 3083 bool ripv = GET_BITFIELD(m->mcgstatus, 0, 0); 3084 bool overflow = GET_BITFIELD(m->status, 62, 62); 3085 bool uncorrected_error = GET_BITFIELD(m->status, 61, 61); 3086 bool recoverable; 3087 u32 core_err_cnt = GET_BITFIELD(m->status, 38, 52); 3088 u32 mscod = GET_BITFIELD(m->status, 16, 31); 3089 u32 errcode = GET_BITFIELD(m->status, 0, 15); 3090 u32 channel = GET_BITFIELD(m->status, 0, 3); 3091 u32 optypenum = GET_BITFIELD(m->status, 4, 6); 3092 /* 3093 * Bits 5-0 of MCi_MISC give the least significant bit that is valid. 3094 * A value 6 is for cache line aligned address, a value 12 is for page 3095 * aligned address reported by patrol scrubber. 3096 */ 3097 u32 lsb = GET_BITFIELD(m->misc, 0, 5); 3098 long channel_mask, first_channel; 3099 u8 rank = 0xff, socket, ha; 3100 int rc, dimm; 3101 char *area_type = "DRAM"; 3102 3103 if (pvt->info.type != SANDY_BRIDGE) 3104 recoverable = true; 3105 else 3106 recoverable = GET_BITFIELD(m->status, 56, 56); 3107 3108 if (uncorrected_error) { 3109 core_err_cnt = 1; 3110 if (ripv) { 3111 tp_event = HW_EVENT_ERR_UNCORRECTED; 3112 } else { 3113 tp_event = HW_EVENT_ERR_FATAL; 3114 } 3115 } else { 3116 tp_event = HW_EVENT_ERR_CORRECTED; 3117 } 3118 3119 /* 3120 * According with Table 15-9 of the Intel Architecture spec vol 3A, 3121 * memory errors should fit in this mask: 3122 * 000f 0000 1mmm cccc (binary) 3123 * where: 3124 * f = Correction Report Filtering Bit. If 1, subsequent errors 3125 * won't be shown 3126 * mmm = error type 3127 * cccc = channel 3128 * If the mask doesn't match, report an error to the parsing logic 3129 */ 3130 switch (optypenum) { 3131 case 0: 3132 optype = "generic undef request error"; 3133 break; 3134 case 1: 3135 optype = "memory read error"; 3136 break; 3137 case 2: 3138 optype = "memory write error"; 3139 break; 3140 case 3: 3141 optype = "addr/cmd error"; 3142 break; 3143 case 4: 3144 optype = "memory scrubbing error"; 3145 break; 3146 default: 3147 optype = "reserved"; 3148 break; 3149 } 3150 3151 if (pvt->info.type == KNIGHTS_LANDING) { 3152 if (channel == 14) { 3153 edac_dbg(0, "%s%s err_code:%04x:%04x EDRAM bank %d\n", 3154 overflow ? " OVERFLOW" : "", 3155 (uncorrected_error && recoverable) 3156 ? " recoverable" : "", 3157 mscod, errcode, 3158 m->bank); 3159 } else { 3160 char A = *("A"); 3161 3162 /* 3163 * Reported channel is in range 0-2, so we can't map it 3164 * back to mc. To figure out mc we check machine check 3165 * bank register that reported this error. 3166 * bank15 means mc0 and bank16 means mc1. 3167 */ 3168 channel = knl_channel_remap(m->bank == 16, channel); 3169 channel_mask = 1 << channel; 3170 3171 snprintf(msg, sizeof(msg), 3172 "%s%s err_code:%04x:%04x channel:%d (DIMM_%c)", 3173 overflow ? " OVERFLOW" : "", 3174 (uncorrected_error && recoverable) 3175 ? " recoverable" : " ", 3176 mscod, errcode, channel, A + channel); 3177 edac_mc_handle_error(tp_event, mci, core_err_cnt, 3178 m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0, 3179 channel, 0, -1, 3180 optype, msg); 3181 } 3182 return; 3183 } else if (lsb < 12) { 3184 rc = get_memory_error_data(mci, m->addr, &socket, &ha, 3185 &channel_mask, &rank, 3186 &area_type, msg); 3187 } else { 3188 rc = get_memory_error_data_from_mce(mci, m, &socket, &ha, 3189 &channel_mask, msg); 3190 } 3191 3192 if (rc < 0) 3193 goto err_parsing; 3194 new_mci = get_mci_for_node_id(socket, ha); 3195 if (!new_mci) { 3196 strcpy(msg, "Error: socket got corrupted!"); 3197 goto err_parsing; 3198 } 3199 mci = new_mci; 3200 pvt = mci->pvt_info; 3201 3202 first_channel = find_first_bit(&channel_mask, NUM_CHANNELS); 3203 3204 if (rank == 0xff) 3205 dimm = -1; 3206 else if (rank < 4) 3207 dimm = 0; 3208 else if (rank < 8) 3209 dimm = 1; 3210 else 3211 dimm = 2; 3212 3213 /* 3214 * FIXME: On some memory configurations (mirror, lockstep), the 3215 * Memory Controller can't point the error to a single DIMM. The 3216 * EDAC core should be handling the channel mask, in order to point 3217 * to the group of dimm's where the error may be happening. 3218 */ 3219 if (!pvt->is_lockstep && !pvt->is_cur_addr_mirrored && !pvt->is_close_pg) 3220 channel = first_channel; 3221 snprintf(msg_full, sizeof(msg_full), 3222 "%s%s area:%s err_code:%04x:%04x socket:%d ha:%d channel_mask:%ld rank:%d %s", 3223 overflow ? " OVERFLOW" : "", 3224 (uncorrected_error && recoverable) ? " recoverable" : "", 3225 area_type, 3226 mscod, errcode, 3227 socket, ha, 3228 channel_mask, 3229 rank, msg); 3230 3231 edac_dbg(0, "%s\n", msg_full); 3232 3233 /* FIXME: need support for channel mask */ 3234 3235 if (channel == CHANNEL_UNSPECIFIED) 3236 channel = -1; 3237 3238 /* Call the helper to output message */ 3239 edac_mc_handle_error(tp_event, mci, core_err_cnt, 3240 m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0, 3241 channel, dimm, -1, 3242 optype, msg_full); 3243 return; 3244 err_parsing: 3245 edac_mc_handle_error(tp_event, mci, core_err_cnt, 0, 0, 0, 3246 -1, -1, -1, 3247 msg, ""); 3248 3249 } 3250 3251 /* 3252 * Check that logging is enabled and that this is the right type 3253 * of error for us to handle. 3254 */ sbridge_mce_check_error(struct notifier_block * nb,unsigned long val,void * data)3255 static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val, 3256 void *data) 3257 { 3258 struct mce *mce = (struct mce *)data; 3259 struct mem_ctl_info *mci; 3260 char *type; 3261 3262 if (mce->kflags & MCE_HANDLED_CEC) 3263 return NOTIFY_DONE; 3264 3265 /* 3266 * Just let mcelog handle it if the error is 3267 * outside the memory controller. A memory error 3268 * is indicated by bit 7 = 1 and bits = 8-11,13-15 = 0. 3269 * bit 12 has an special meaning. 3270 */ 3271 if ((mce->status & 0xefff) >> 7 != 1) 3272 return NOTIFY_DONE; 3273 3274 /* Check ADDRV bit in STATUS */ 3275 if (!GET_BITFIELD(mce->status, 58, 58)) 3276 return NOTIFY_DONE; 3277 3278 /* Check MISCV bit in STATUS */ 3279 if (!GET_BITFIELD(mce->status, 59, 59)) 3280 return NOTIFY_DONE; 3281 3282 /* Check address type in MISC (physical address only) */ 3283 if (GET_BITFIELD(mce->misc, 6, 8) != 2) 3284 return NOTIFY_DONE; 3285 3286 mci = get_mci_for_node_id(mce->socketid, IMC0); 3287 if (!mci) 3288 return NOTIFY_DONE; 3289 3290 if (mce->mcgstatus & MCG_STATUS_MCIP) 3291 type = "Exception"; 3292 else 3293 type = "Event"; 3294 3295 sbridge_mc_printk(mci, KERN_DEBUG, "HANDLING MCE MEMORY ERROR\n"); 3296 3297 sbridge_mc_printk(mci, KERN_DEBUG, "CPU %d: Machine Check %s: %Lx " 3298 "Bank %d: %016Lx\n", mce->extcpu, type, 3299 mce->mcgstatus, mce->bank, mce->status); 3300 sbridge_mc_printk(mci, KERN_DEBUG, "TSC %llx ", mce->tsc); 3301 sbridge_mc_printk(mci, KERN_DEBUG, "ADDR %llx ", mce->addr); 3302 sbridge_mc_printk(mci, KERN_DEBUG, "MISC %llx ", mce->misc); 3303 3304 sbridge_mc_printk(mci, KERN_DEBUG, "PROCESSOR %u:%x TIME %llu SOCKET " 3305 "%u APIC %x\n", mce->cpuvendor, mce->cpuid, 3306 mce->time, mce->socketid, mce->apicid); 3307 3308 sbridge_mce_output_error(mci, mce); 3309 3310 /* Advice mcelog that the error were handled */ 3311 mce->kflags |= MCE_HANDLED_EDAC; 3312 return NOTIFY_OK; 3313 } 3314 3315 static struct notifier_block sbridge_mce_dec = { 3316 .notifier_call = sbridge_mce_check_error, 3317 .priority = MCE_PRIO_EDAC, 3318 }; 3319 3320 /**************************************************************************** 3321 EDAC register/unregister logic 3322 ****************************************************************************/ 3323 sbridge_unregister_mci(struct sbridge_dev * sbridge_dev)3324 static void sbridge_unregister_mci(struct sbridge_dev *sbridge_dev) 3325 { 3326 struct mem_ctl_info *mci = sbridge_dev->mci; 3327 3328 if (unlikely(!mci || !mci->pvt_info)) { 3329 edac_dbg(0, "MC: dev = %p\n", &sbridge_dev->pdev[0]->dev); 3330 3331 sbridge_printk(KERN_ERR, "Couldn't find mci handler\n"); 3332 return; 3333 } 3334 3335 edac_dbg(0, "MC: mci = %p, dev = %p\n", 3336 mci, &sbridge_dev->pdev[0]->dev); 3337 3338 /* Remove MC sysfs nodes */ 3339 edac_mc_del_mc(mci->pdev); 3340 3341 edac_dbg(1, "%s: free mci struct\n", mci->ctl_name); 3342 kfree(mci->ctl_name); 3343 edac_mc_free(mci); 3344 sbridge_dev->mci = NULL; 3345 } 3346 sbridge_register_mci(struct sbridge_dev * sbridge_dev,enum type type)3347 static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type) 3348 { 3349 struct mem_ctl_info *mci; 3350 struct edac_mc_layer layers[2]; 3351 struct sbridge_pvt *pvt; 3352 struct pci_dev *pdev = sbridge_dev->pdev[0]; 3353 int rc; 3354 3355 /* allocate a new MC control structure */ 3356 layers[0].type = EDAC_MC_LAYER_CHANNEL; 3357 layers[0].size = type == KNIGHTS_LANDING ? 3358 KNL_MAX_CHANNELS : NUM_CHANNELS; 3359 layers[0].is_virt_csrow = false; 3360 layers[1].type = EDAC_MC_LAYER_SLOT; 3361 layers[1].size = type == KNIGHTS_LANDING ? 1 : MAX_DIMMS; 3362 layers[1].is_virt_csrow = true; 3363 mci = edac_mc_alloc(sbridge_dev->mc, ARRAY_SIZE(layers), layers, 3364 sizeof(*pvt)); 3365 3366 if (unlikely(!mci)) 3367 return -ENOMEM; 3368 3369 edac_dbg(0, "MC: mci = %p, dev = %p\n", 3370 mci, &pdev->dev); 3371 3372 pvt = mci->pvt_info; 3373 memset(pvt, 0, sizeof(*pvt)); 3374 3375 /* Associate sbridge_dev and mci for future usage */ 3376 pvt->sbridge_dev = sbridge_dev; 3377 sbridge_dev->mci = mci; 3378 3379 mci->mtype_cap = type == KNIGHTS_LANDING ? 3380 MEM_FLAG_DDR4 : MEM_FLAG_DDR3; 3381 mci->edac_ctl_cap = EDAC_FLAG_NONE; 3382 mci->edac_cap = EDAC_FLAG_NONE; 3383 mci->mod_name = EDAC_MOD_STR; 3384 mci->dev_name = pci_name(pdev); 3385 mci->ctl_page_to_phys = NULL; 3386 3387 pvt->info.type = type; 3388 switch (type) { 3389 case IVY_BRIDGE: 3390 pvt->info.rankcfgr = IB_RANK_CFG_A; 3391 pvt->info.get_tolm = ibridge_get_tolm; 3392 pvt->info.get_tohm = ibridge_get_tohm; 3393 pvt->info.dram_rule = ibridge_dram_rule; 3394 pvt->info.get_memory_type = get_memory_type; 3395 pvt->info.get_node_id = get_node_id; 3396 pvt->info.get_ha = ibridge_get_ha; 3397 pvt->info.rir_limit = rir_limit; 3398 pvt->info.sad_limit = sad_limit; 3399 pvt->info.interleave_mode = interleave_mode; 3400 pvt->info.dram_attr = dram_attr; 3401 pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); 3402 pvt->info.interleave_list = ibridge_interleave_list; 3403 pvt->info.interleave_pkg = ibridge_interleave_pkg; 3404 pvt->info.get_width = ibridge_get_width; 3405 3406 /* Store pci devices at mci for faster access */ 3407 rc = ibridge_mci_bind_devs(mci, sbridge_dev); 3408 if (unlikely(rc < 0)) 3409 goto fail0; 3410 get_source_id(mci); 3411 mci->ctl_name = kasprintf(GFP_KERNEL, "Ivy Bridge SrcID#%d_Ha#%d", 3412 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom); 3413 break; 3414 case SANDY_BRIDGE: 3415 pvt->info.rankcfgr = SB_RANK_CFG_A; 3416 pvt->info.get_tolm = sbridge_get_tolm; 3417 pvt->info.get_tohm = sbridge_get_tohm; 3418 pvt->info.dram_rule = sbridge_dram_rule; 3419 pvt->info.get_memory_type = get_memory_type; 3420 pvt->info.get_node_id = get_node_id; 3421 pvt->info.get_ha = sbridge_get_ha; 3422 pvt->info.rir_limit = rir_limit; 3423 pvt->info.sad_limit = sad_limit; 3424 pvt->info.interleave_mode = interleave_mode; 3425 pvt->info.dram_attr = dram_attr; 3426 pvt->info.max_sad = ARRAY_SIZE(sbridge_dram_rule); 3427 pvt->info.interleave_list = sbridge_interleave_list; 3428 pvt->info.interleave_pkg = sbridge_interleave_pkg; 3429 pvt->info.get_width = sbridge_get_width; 3430 3431 /* Store pci devices at mci for faster access */ 3432 rc = sbridge_mci_bind_devs(mci, sbridge_dev); 3433 if (unlikely(rc < 0)) 3434 goto fail0; 3435 get_source_id(mci); 3436 mci->ctl_name = kasprintf(GFP_KERNEL, "Sandy Bridge SrcID#%d_Ha#%d", 3437 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom); 3438 break; 3439 case HASWELL: 3440 /* rankcfgr isn't used */ 3441 pvt->info.get_tolm = haswell_get_tolm; 3442 pvt->info.get_tohm = haswell_get_tohm; 3443 pvt->info.dram_rule = ibridge_dram_rule; 3444 pvt->info.get_memory_type = haswell_get_memory_type; 3445 pvt->info.get_node_id = haswell_get_node_id; 3446 pvt->info.get_ha = ibridge_get_ha; 3447 pvt->info.rir_limit = haswell_rir_limit; 3448 pvt->info.sad_limit = sad_limit; 3449 pvt->info.interleave_mode = interleave_mode; 3450 pvt->info.dram_attr = dram_attr; 3451 pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); 3452 pvt->info.interleave_list = ibridge_interleave_list; 3453 pvt->info.interleave_pkg = ibridge_interleave_pkg; 3454 pvt->info.get_width = ibridge_get_width; 3455 3456 /* Store pci devices at mci for faster access */ 3457 rc = haswell_mci_bind_devs(mci, sbridge_dev); 3458 if (unlikely(rc < 0)) 3459 goto fail0; 3460 get_source_id(mci); 3461 mci->ctl_name = kasprintf(GFP_KERNEL, "Haswell SrcID#%d_Ha#%d", 3462 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom); 3463 break; 3464 case BROADWELL: 3465 /* rankcfgr isn't used */ 3466 pvt->info.get_tolm = haswell_get_tolm; 3467 pvt->info.get_tohm = haswell_get_tohm; 3468 pvt->info.dram_rule = ibridge_dram_rule; 3469 pvt->info.get_memory_type = haswell_get_memory_type; 3470 pvt->info.get_node_id = haswell_get_node_id; 3471 pvt->info.get_ha = ibridge_get_ha; 3472 pvt->info.rir_limit = haswell_rir_limit; 3473 pvt->info.sad_limit = sad_limit; 3474 pvt->info.interleave_mode = interleave_mode; 3475 pvt->info.dram_attr = dram_attr; 3476 pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); 3477 pvt->info.interleave_list = ibridge_interleave_list; 3478 pvt->info.interleave_pkg = ibridge_interleave_pkg; 3479 pvt->info.get_width = broadwell_get_width; 3480 3481 /* Store pci devices at mci for faster access */ 3482 rc = broadwell_mci_bind_devs(mci, sbridge_dev); 3483 if (unlikely(rc < 0)) 3484 goto fail0; 3485 get_source_id(mci); 3486 mci->ctl_name = kasprintf(GFP_KERNEL, "Broadwell SrcID#%d_Ha#%d", 3487 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom); 3488 break; 3489 case KNIGHTS_LANDING: 3490 /* pvt->info.rankcfgr == ??? */ 3491 pvt->info.get_tolm = knl_get_tolm; 3492 pvt->info.get_tohm = knl_get_tohm; 3493 pvt->info.dram_rule = knl_dram_rule; 3494 pvt->info.get_memory_type = knl_get_memory_type; 3495 pvt->info.get_node_id = knl_get_node_id; 3496 pvt->info.get_ha = knl_get_ha; 3497 pvt->info.rir_limit = NULL; 3498 pvt->info.sad_limit = knl_sad_limit; 3499 pvt->info.interleave_mode = knl_interleave_mode; 3500 pvt->info.dram_attr = dram_attr_knl; 3501 pvt->info.max_sad = ARRAY_SIZE(knl_dram_rule); 3502 pvt->info.interleave_list = knl_interleave_list; 3503 pvt->info.interleave_pkg = ibridge_interleave_pkg; 3504 pvt->info.get_width = knl_get_width; 3505 3506 rc = knl_mci_bind_devs(mci, sbridge_dev); 3507 if (unlikely(rc < 0)) 3508 goto fail0; 3509 get_source_id(mci); 3510 mci->ctl_name = kasprintf(GFP_KERNEL, "Knights Landing SrcID#%d_Ha#%d", 3511 pvt->sbridge_dev->source_id, pvt->sbridge_dev->dom); 3512 break; 3513 } 3514 3515 if (!mci->ctl_name) { 3516 rc = -ENOMEM; 3517 goto fail0; 3518 } 3519 3520 /* Get dimm basic config and the memory layout */ 3521 rc = get_dimm_config(mci); 3522 if (rc < 0) { 3523 edac_dbg(0, "MC: failed to get_dimm_config()\n"); 3524 goto fail; 3525 } 3526 get_memory_layout(mci); 3527 3528 /* record ptr to the generic device */ 3529 mci->pdev = &pdev->dev; 3530 3531 /* add this new MC control structure to EDAC's list of MCs */ 3532 if (unlikely(edac_mc_add_mc(mci))) { 3533 edac_dbg(0, "MC: failed edac_mc_add_mc()\n"); 3534 rc = -EINVAL; 3535 goto fail; 3536 } 3537 3538 return 0; 3539 3540 fail: 3541 kfree(mci->ctl_name); 3542 fail0: 3543 edac_mc_free(mci); 3544 sbridge_dev->mci = NULL; 3545 return rc; 3546 } 3547 3548 static const struct x86_cpu_id sbridge_cpuids[] = { 3549 X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &pci_dev_descr_sbridge_table), 3550 X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE_X, &pci_dev_descr_ibridge_table), 3551 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, &pci_dev_descr_haswell_table), 3552 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, &pci_dev_descr_broadwell_table), 3553 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D, &pci_dev_descr_broadwell_table), 3554 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &pci_dev_descr_knl_table), 3555 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &pci_dev_descr_knl_table), 3556 { } 3557 }; 3558 MODULE_DEVICE_TABLE(x86cpu, sbridge_cpuids); 3559 3560 /* 3561 * sbridge_probe Get all devices and register memory controllers 3562 * present. 3563 * return: 3564 * 0 for FOUND a device 3565 * < 0 for error code 3566 */ 3567 sbridge_probe(const struct x86_cpu_id * id)3568 static int sbridge_probe(const struct x86_cpu_id *id) 3569 { 3570 int rc; 3571 u8 mc, num_mc = 0; 3572 struct sbridge_dev *sbridge_dev; 3573 struct pci_id_table *ptable = (struct pci_id_table *)id->driver_data; 3574 3575 /* get the pci devices we want to reserve for our use */ 3576 rc = sbridge_get_all_devices(&num_mc, ptable); 3577 3578 if (unlikely(rc < 0)) { 3579 edac_dbg(0, "couldn't get all devices\n"); 3580 goto fail0; 3581 } 3582 3583 mc = 0; 3584 3585 list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) { 3586 edac_dbg(0, "Registering MC#%d (%d of %d)\n", 3587 mc, mc + 1, num_mc); 3588 3589 sbridge_dev->mc = mc++; 3590 rc = sbridge_register_mci(sbridge_dev, ptable->type); 3591 if (unlikely(rc < 0)) 3592 goto fail1; 3593 } 3594 3595 sbridge_printk(KERN_INFO, "%s\n", SBRIDGE_REVISION); 3596 3597 return 0; 3598 3599 fail1: 3600 list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) 3601 sbridge_unregister_mci(sbridge_dev); 3602 3603 sbridge_put_all_devices(); 3604 fail0: 3605 return rc; 3606 } 3607 3608 /* 3609 * sbridge_remove cleanup 3610 * 3611 */ sbridge_remove(void)3612 static void sbridge_remove(void) 3613 { 3614 struct sbridge_dev *sbridge_dev; 3615 3616 edac_dbg(0, "\n"); 3617 3618 list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) 3619 sbridge_unregister_mci(sbridge_dev); 3620 3621 /* Release PCI resources */ 3622 sbridge_put_all_devices(); 3623 } 3624 3625 /* 3626 * sbridge_init Module entry function 3627 * Try to initialize this module for its devices 3628 */ sbridge_init(void)3629 static int __init sbridge_init(void) 3630 { 3631 const struct x86_cpu_id *id; 3632 const char *owner; 3633 int rc; 3634 3635 edac_dbg(2, "\n"); 3636 3637 if (ghes_get_devices()) 3638 return -EBUSY; 3639 3640 owner = edac_get_owner(); 3641 if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) 3642 return -EBUSY; 3643 3644 if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) 3645 return -ENODEV; 3646 3647 id = x86_match_cpu(sbridge_cpuids); 3648 if (!id) 3649 return -ENODEV; 3650 3651 /* Ensure that the OPSTATE is set correctly for POLL or NMI */ 3652 opstate_init(); 3653 3654 rc = sbridge_probe(id); 3655 3656 if (rc >= 0) { 3657 mce_register_decode_chain(&sbridge_mce_dec); 3658 return 0; 3659 } 3660 3661 sbridge_printk(KERN_ERR, "Failed to register device with error %d.\n", 3662 rc); 3663 3664 return rc; 3665 } 3666 3667 /* 3668 * sbridge_exit() Module exit function 3669 * Unregister the driver 3670 */ sbridge_exit(void)3671 static void __exit sbridge_exit(void) 3672 { 3673 edac_dbg(2, "\n"); 3674 sbridge_remove(); 3675 mce_unregister_decode_chain(&sbridge_mce_dec); 3676 } 3677 3678 module_init(sbridge_init); 3679 module_exit(sbridge_exit); 3680 3681 module_param(edac_op_state, int, 0444); 3682 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); 3683 3684 MODULE_LICENSE("GPL"); 3685 MODULE_AUTHOR("Mauro Carvalho Chehab"); 3686 MODULE_AUTHOR("Red Hat Inc. (https://www.redhat.com)"); 3687 MODULE_DESCRIPTION("MC Driver for Intel Sandy Bridge and Ivy Bridge memory controllers - " 3688 SBRIDGE_REVISION); 3689
