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