1 /* 2 * AMD64 class Memory Controller kernel module 3 * 4 * Copyright (c) 2009 SoftwareBitMaker. 5 * Copyright (c) 2009-15 Advanced Micro Devices, Inc. 6 * 7 * This file may be distributed under the terms of the 8 * GNU General Public License. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/ctype.h> 13 #include <linux/init.h> 14 #include <linux/pci.h> 15 #include <linux/pci_ids.h> 16 #include <linux/slab.h> 17 #include <linux/mmzone.h> 18 #include <linux/edac.h> 19 #include <linux/bitfield.h> 20 #include <asm/cpu_device_id.h> 21 #include <asm/msr.h> 22 #include "edac_module.h" 23 #include "mce_amd.h" 24 25 #define amd64_info(fmt, arg...) \ 26 edac_printk(KERN_INFO, "amd64", fmt, ##arg) 27 28 #define amd64_warn(fmt, arg...) \ 29 edac_printk(KERN_WARNING, "amd64", "Warning: " fmt, ##arg) 30 31 #define amd64_err(fmt, arg...) \ 32 edac_printk(KERN_ERR, "amd64", "Error: " fmt, ##arg) 33 34 #define amd64_mc_warn(mci, fmt, arg...) \ 35 edac_mc_chipset_printk(mci, KERN_WARNING, "amd64", fmt, ##arg) 36 37 #define amd64_mc_err(mci, fmt, arg...) \ 38 edac_mc_chipset_printk(mci, KERN_ERR, "amd64", fmt, ##arg) 39 40 /* 41 * Throughout the comments in this code, the following terms are used: 42 * 43 * SysAddr, DramAddr, and InputAddr 44 * 45 * These terms come directly from the amd64 documentation 46 * (AMD publication #26094). They are defined as follows: 47 * 48 * SysAddr: 49 * This is a physical address generated by a CPU core or a device 50 * doing DMA. If generated by a CPU core, a SysAddr is the result of 51 * a virtual to physical address translation by the CPU core's address 52 * translation mechanism (MMU). 53 * 54 * DramAddr: 55 * A DramAddr is derived from a SysAddr by subtracting an offset that 56 * depends on which node the SysAddr maps to and whether the SysAddr 57 * is within a range affected by memory hoisting. The DRAM Base 58 * (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers 59 * determine which node a SysAddr maps to. 60 * 61 * If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr 62 * is within the range of addresses specified by this register, then 63 * a value x from the DHAR is subtracted from the SysAddr to produce a 64 * DramAddr. Here, x represents the base address for the node that 65 * the SysAddr maps to plus an offset due to memory hoisting. See 66 * section 3.4.8 and the comments in amd64_get_dram_hole_info() and 67 * sys_addr_to_dram_addr() below for more information. 68 * 69 * If the SysAddr is not affected by the DHAR then a value y is 70 * subtracted from the SysAddr to produce a DramAddr. Here, y is the 71 * base address for the node that the SysAddr maps to. See section 72 * 3.4.4 and the comments in sys_addr_to_dram_addr() below for more 73 * information. 74 * 75 * InputAddr: 76 * A DramAddr is translated to an InputAddr before being passed to the 77 * memory controller for the node that the DramAddr is associated 78 * with. The memory controller then maps the InputAddr to a csrow. 79 * If node interleaving is not in use, then the InputAddr has the same 80 * value as the DramAddr. Otherwise, the InputAddr is produced by 81 * discarding the bits used for node interleaving from the DramAddr. 82 * See section 3.4.4 for more information. 83 * 84 * The memory controller for a given node uses its DRAM CS Base and 85 * DRAM CS Mask registers to map an InputAddr to a csrow. See 86 * sections 3.5.4 and 3.5.5 for more information. 87 */ 88 89 #define EDAC_AMD64_VERSION "3.5.0" 90 #define EDAC_MOD_STR "amd64_edac" 91 92 /* Extended Model from CPUID, for CPU Revision numbers */ 93 #define K8_REV_D 1 94 #define K8_REV_E 2 95 #define K8_REV_F 4 96 97 /* Hardware limit on ChipSelect rows per MC and processors per system */ 98 #define NUM_CHIPSELECTS 8 99 #define DRAM_RANGES 8 100 #define NUM_CONTROLLERS 12 101 102 #define ON true 103 #define OFF false 104 105 /* 106 * PCI-defined configuration space registers 107 */ 108 #define PCI_DEVICE_ID_AMD_15H_NB_F1 0x1601 109 #define PCI_DEVICE_ID_AMD_15H_NB_F2 0x1602 110 #define PCI_DEVICE_ID_AMD_15H_M30H_NB_F1 0x141b 111 #define PCI_DEVICE_ID_AMD_15H_M30H_NB_F2 0x141c 112 #define PCI_DEVICE_ID_AMD_15H_M60H_NB_F1 0x1571 113 #define PCI_DEVICE_ID_AMD_15H_M60H_NB_F2 0x1572 114 #define PCI_DEVICE_ID_AMD_16H_NB_F1 0x1531 115 #define PCI_DEVICE_ID_AMD_16H_NB_F2 0x1532 116 #define PCI_DEVICE_ID_AMD_16H_M30H_NB_F1 0x1581 117 #define PCI_DEVICE_ID_AMD_16H_M30H_NB_F2 0x1582 118 119 /* 120 * Function 1 - Address Map 121 */ 122 #define DRAM_BASE_LO 0x40 123 #define DRAM_LIMIT_LO 0x44 124 125 /* 126 * F15 M30h D18F1x2[1C:00] 127 */ 128 #define DRAM_CONT_BASE 0x200 129 #define DRAM_CONT_LIMIT 0x204 130 131 /* 132 * F15 M30h D18F1x2[4C:40] 133 */ 134 #define DRAM_CONT_HIGH_OFF 0x240 135 136 #define dram_rw(pvt, i) ((u8)(pvt->ranges[i].base.lo & 0x3)) 137 #define dram_intlv_sel(pvt, i) ((u8)((pvt->ranges[i].lim.lo >> 8) & 0x7)) 138 #define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7)) 139 140 #define DHAR 0xf0 141 #define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1)) 142 #define dhar_base(pvt) ((pvt)->dhar & 0xff000000) 143 #define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16) 144 145 /* NOTE: Extra mask bit vs K8 */ 146 #define f10_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff80) << 16) 147 148 #define DCT_CFG_SEL 0x10C 149 150 #define DRAM_LOCAL_NODE_BASE 0x120 151 #define DRAM_LOCAL_NODE_LIM 0x124 152 153 #define DRAM_BASE_HI 0x140 154 #define DRAM_LIMIT_HI 0x144 155 156 157 /* 158 * Function 2 - DRAM controller 159 */ 160 #define DCSB0 0x40 161 #define DCSB1 0x140 162 #define DCSB_CS_ENABLE BIT(0) 163 164 #define DCSM0 0x60 165 #define DCSM1 0x160 166 167 #define csrow_enabled(i, dct, pvt) ((pvt)->csels[(dct)].csbases[(i)] & DCSB_CS_ENABLE) 168 #define csrow_sec_enabled(i, dct, pvt) ((pvt)->csels[(dct)].csbases_sec[(i)] & DCSB_CS_ENABLE) 169 170 #define DRAM_CONTROL 0x78 171 172 #define DBAM0 0x80 173 #define DBAM1 0x180 174 175 /* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */ 176 #define DBAM_DIMM(i, reg) ((((reg) >> (4*(i)))) & 0xF) 177 178 #define DBAM_MAX_VALUE 11 179 180 #define DCLR0 0x90 181 #define DCLR1 0x190 182 #define REVE_WIDTH_128 BIT(16) 183 #define WIDTH_128 BIT(11) 184 185 #define DCHR0 0x94 186 #define DCHR1 0x194 187 #define DDR3_MODE BIT(8) 188 189 #define DCT_SEL_LO 0x110 190 #define dct_high_range_enabled(pvt) ((pvt)->dct_sel_lo & BIT(0)) 191 #define dct_interleave_enabled(pvt) ((pvt)->dct_sel_lo & BIT(2)) 192 193 #define dct_ganging_enabled(pvt) ((boot_cpu_data.x86 == 0x10) && ((pvt)->dct_sel_lo & BIT(4))) 194 195 #define dct_data_intlv_enabled(pvt) ((pvt)->dct_sel_lo & BIT(5)) 196 #define dct_memory_cleared(pvt) ((pvt)->dct_sel_lo & BIT(10)) 197 198 #define SWAP_INTLV_REG 0x10c 199 200 #define DCT_SEL_HI 0x114 201 202 #define F15H_M60H_SCRCTRL 0x1C8 203 204 /* 205 * Function 3 - Misc Control 206 */ 207 #define NBCTL 0x40 208 209 #define NBCFG 0x44 210 #define NBCFG_CHIPKILL BIT(23) 211 #define NBCFG_ECC_ENABLE BIT(22) 212 213 /* F3x48: NBSL */ 214 #define F10_NBSL_EXT_ERR_ECC 0x8 215 #define NBSL_PP_OBS 0x2 216 217 #define SCRCTRL 0x58 218 219 #define F10_ONLINE_SPARE 0xB0 220 #define online_spare_swap_done(pvt, c) (((pvt)->online_spare >> (1 + 2 * (c))) & 0x1) 221 #define online_spare_bad_dramcs(pvt, c) (((pvt)->online_spare >> (4 + 4 * (c))) & 0x7) 222 223 #define F10_NB_ARRAY_ADDR 0xB8 224 #define F10_NB_ARRAY_DRAM BIT(31) 225 226 /* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */ 227 #define SET_NB_ARRAY_ADDR(section) (((section) & 0x3) << 1) 228 229 #define F10_NB_ARRAY_DATA 0xBC 230 #define F10_NB_ARR_ECC_WR_REQ BIT(17) 231 #define SET_NB_DRAM_INJECTION_WRITE(inj) \ 232 (BIT(((inj.word) & 0xF) + 20) | \ 233 F10_NB_ARR_ECC_WR_REQ | inj.bit_map) 234 #define SET_NB_DRAM_INJECTION_READ(inj) \ 235 (BIT(((inj.word) & 0xF) + 20) | \ 236 BIT(16) | inj.bit_map) 237 238 239 #define NBCAP 0xE8 240 #define NBCAP_CHIPKILL BIT(4) 241 #define NBCAP_SECDED BIT(3) 242 #define NBCAP_DCT_DUAL BIT(0) 243 244 #define EXT_NB_MCA_CFG 0x180 245 246 /* MSRs */ 247 #define MSR_MCGCTL_NBE BIT(4) 248 249 /* F17h */ 250 251 /* F0: */ 252 #define DF_DHAR 0x104 253 254 /* UMC CH register offsets */ 255 #define UMCCH_BASE_ADDR 0x0 256 #define UMCCH_BASE_ADDR_SEC 0x10 257 #define UMCCH_ADDR_MASK 0x20 258 #define UMCCH_ADDR_MASK_SEC 0x28 259 #define UMCCH_ADDR_MASK_SEC_DDR5 0x30 260 #define UMCCH_ADDR_CFG 0x30 261 #define UMCCH_ADDR_CFG_DDR5 0x40 262 #define UMCCH_DIMM_CFG 0x80 263 #define UMCCH_DIMM_CFG_DDR5 0x90 264 #define UMCCH_UMC_CFG 0x100 265 #define UMCCH_SDP_CTRL 0x104 266 #define UMCCH_ECC_CTRL 0x14C 267 #define UMCCH_ECC_BAD_SYMBOL 0xD90 268 #define UMCCH_UMC_CAP 0xDF0 269 #define UMCCH_UMC_CAP_HI 0xDF4 270 271 /* UMC CH bitfields */ 272 #define UMC_ECC_CHIPKILL_CAP BIT(31) 273 #define UMC_ECC_ENABLED BIT(30) 274 275 #define UMC_SDP_INIT BIT(31) 276 277 /* Error injection control structure */ 278 struct error_injection { 279 u32 section; 280 u32 word; 281 u32 bit_map; 282 }; 283 284 /* low and high part of PCI config space regs */ 285 struct reg_pair { 286 u32 lo, hi; 287 }; 288 289 /* 290 * See F1x[1, 0][7C:40] DRAM Base/Limit Registers 291 */ 292 struct dram_range { 293 struct reg_pair base; 294 struct reg_pair lim; 295 }; 296 297 /* A DCT chip selects collection */ 298 struct chip_select { 299 u32 csbases[NUM_CHIPSELECTS]; 300 u32 csbases_sec[NUM_CHIPSELECTS]; 301 u8 b_cnt; 302 303 u32 csmasks[NUM_CHIPSELECTS]; 304 u32 csmasks_sec[NUM_CHIPSELECTS]; 305 u8 m_cnt; 306 }; 307 308 struct amd64_umc { 309 u32 dimm_cfg; /* DIMM Configuration reg */ 310 u32 umc_cfg; /* Configuration reg */ 311 u32 sdp_ctrl; /* SDP Control reg */ 312 u32 ecc_ctrl; /* DRAM ECC Control reg */ 313 u32 umc_cap_hi; /* Capabilities High reg */ 314 315 /* cache the dram_type */ 316 enum mem_type dram_type; 317 }; 318 319 struct amd64_family_flags { 320 /* 321 * Indicates that the system supports the new register offsets, etc. 322 * first introduced with Family 19h Model 10h. 323 */ 324 __u64 zn_regs_v2 : 1, 325 326 __reserved : 63; 327 }; 328 329 struct amd64_pvt { 330 struct low_ops *ops; 331 332 /* pci_device handles which we utilize */ 333 struct pci_dev *F1, *F2, *F3; 334 335 u16 mc_node_id; /* MC index of this MC node */ 336 u8 fam; /* CPU family */ 337 u8 model; /* ... model */ 338 u8 stepping; /* ... stepping */ 339 340 int ext_model; /* extended model value of this node */ 341 342 /* Raw registers */ 343 u32 dclr0; /* DRAM Configuration Low DCT0 reg */ 344 u32 dclr1; /* DRAM Configuration Low DCT1 reg */ 345 u32 dchr0; /* DRAM Configuration High DCT0 reg */ 346 u32 dchr1; /* DRAM Configuration High DCT1 reg */ 347 u32 nbcap; /* North Bridge Capabilities */ 348 u32 nbcfg; /* F10 North Bridge Configuration */ 349 u32 ext_nbcfg; /* Extended F10 North Bridge Configuration */ 350 u32 dhar; /* DRAM Hoist reg */ 351 u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */ 352 u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */ 353 354 /* one for each DCT/UMC */ 355 struct chip_select csels[NUM_CONTROLLERS]; 356 357 /* DRAM base and limit pairs F1x[78,70,68,60,58,50,48,40] */ 358 struct dram_range ranges[DRAM_RANGES]; 359 360 u64 top_mem; /* top of memory below 4GB */ 361 u64 top_mem2; /* top of memory above 4GB */ 362 363 u32 dct_sel_lo; /* DRAM Controller Select Low */ 364 u32 dct_sel_hi; /* DRAM Controller Select High */ 365 u32 online_spare; /* On-Line spare Reg */ 366 367 /* x4, x8, or x16 syndromes in use */ 368 u8 ecc_sym_sz; 369 370 const char *ctl_name; 371 u16 f1_id, f2_id; 372 /* Maximum number of memory controllers per die/node. */ 373 u8 max_mcs; 374 375 struct amd64_family_flags flags; 376 /* place to store error injection parameters prior to issue */ 377 struct error_injection injection; 378 379 /* 380 * cache the dram_type 381 * 382 * NOTE: Don't use this for Family 17h and later. 383 * Use dram_type in struct amd64_umc instead. 384 */ 385 enum mem_type dram_type; 386 387 struct amd64_umc *umc; /* UMC registers */ 388 }; 389 390 enum err_codes { 391 DECODE_OK = 0, 392 ERR_NODE = -1, 393 ERR_CSROW = -2, 394 ERR_CHANNEL = -3, 395 ERR_SYND = -4, 396 ERR_NORM_ADDR = -5, 397 }; 398 399 struct err_info { 400 int err_code; 401 struct mem_ctl_info *src_mci; 402 int csrow; 403 int channel; 404 u16 syndrome; 405 u32 page; 406 u32 offset; 407 }; 408 409 static inline u32 get_umc_base(u8 channel) 410 { 411 /* chY: 0xY50000 */ 412 return 0x50000 + (channel << 20); 413 } 414 415 static inline u64 get_dram_base(struct amd64_pvt *pvt, u8 i) 416 { 417 u64 addr = ((u64)pvt->ranges[i].base.lo & 0xffff0000) << 8; 418 419 if (boot_cpu_data.x86 == 0xf) 420 return addr; 421 422 return (((u64)pvt->ranges[i].base.hi & 0x000000ff) << 40) | addr; 423 } 424 425 static inline u64 get_dram_limit(struct amd64_pvt *pvt, u8 i) 426 { 427 u64 lim = (((u64)pvt->ranges[i].lim.lo & 0xffff0000) << 8) | 0x00ffffff; 428 429 if (boot_cpu_data.x86 == 0xf) 430 return lim; 431 432 return (((u64)pvt->ranges[i].lim.hi & 0x000000ff) << 40) | lim; 433 } 434 435 static inline u16 extract_syndrome(u64 status) 436 { 437 return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00); 438 } 439 440 static inline u8 dct_sel_interleave_addr(struct amd64_pvt *pvt) 441 { 442 if (pvt->fam == 0x15 && pvt->model >= 0x30) 443 return (((pvt->dct_sel_hi >> 9) & 0x1) << 2) | 444 ((pvt->dct_sel_lo >> 6) & 0x3); 445 446 return ((pvt)->dct_sel_lo >> 6) & 0x3; 447 } 448 /* 449 * per-node ECC settings descriptor 450 */ 451 struct ecc_settings { 452 u32 old_nbctl; 453 bool nbctl_valid; 454 455 struct flags { 456 unsigned long nb_mce_enable:1; 457 unsigned long nb_ecc_prev:1; 458 } flags; 459 }; 460 461 /* 462 * Each of the PCI Device IDs types have their own set of hardware accessor 463 * functions and per device encoding/decoding logic. 464 */ 465 struct low_ops { 466 void (*map_sysaddr_to_csrow)(struct mem_ctl_info *mci, u64 sys_addr, 467 struct err_info *err); 468 int (*dbam_to_cs)(struct amd64_pvt *pvt, u8 dct, 469 unsigned int cs_mode, int cs_mask_nr); 470 int (*hw_info_get)(struct amd64_pvt *pvt); 471 bool (*ecc_enabled)(struct amd64_pvt *pvt); 472 void (*setup_mci_misc_attrs)(struct mem_ctl_info *mci); 473 void (*dump_misc_regs)(struct amd64_pvt *pvt); 474 void (*get_err_info)(struct mce *m, struct err_info *err); 475 }; 476 477 int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset, 478 u32 *val, const char *func); 479 int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset, 480 u32 val, const char *func); 481 482 #define amd64_read_pci_cfg(pdev, offset, val) \ 483 __amd64_read_pci_cfg_dword(pdev, offset, val, __func__) 484 485 #define amd64_write_pci_cfg(pdev, offset, val) \ 486 __amd64_write_pci_cfg_dword(pdev, offset, val, __func__) 487 488 #define to_mci(k) container_of(k, struct mem_ctl_info, dev) 489 490 /* Injection helpers */ 491 static inline void disable_caches(void *dummy) 492 { 493 write_cr0(read_cr0() | X86_CR0_CD); 494 wbinvd(); 495 } 496 497 static inline void enable_caches(void *dummy) 498 { 499 write_cr0(read_cr0() & ~X86_CR0_CD); 500 } 501 502 static inline u8 dram_intlv_en(struct amd64_pvt *pvt, unsigned int i) 503 { 504 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 505 u32 tmp; 506 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &tmp); 507 return (u8) tmp & 0xF; 508 } 509 return (u8) (pvt->ranges[i].base.lo >> 8) & 0x7; 510 } 511 512 static inline u8 dhar_valid(struct amd64_pvt *pvt) 513 { 514 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 515 u32 tmp; 516 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp); 517 return (tmp >> 1) & BIT(0); 518 } 519 return (pvt)->dhar & BIT(0); 520 } 521 522 static inline u32 dct_sel_baseaddr(struct amd64_pvt *pvt) 523 { 524 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 525 u32 tmp; 526 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp); 527 return (tmp >> 11) & 0x1FFF; 528 } 529 return (pvt)->dct_sel_lo & 0xFFFFF800; 530 } 531