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 <asm/msr.h> 20 #include "edac_core.h" 21 #include "mce_amd.h" 22 23 #define amd64_debug(fmt, arg...) \ 24 edac_printk(KERN_DEBUG, "amd64", fmt, ##arg) 25 26 #define amd64_info(fmt, arg...) \ 27 edac_printk(KERN_INFO, "amd64", fmt, ##arg) 28 29 #define amd64_notice(fmt, arg...) \ 30 edac_printk(KERN_NOTICE, "amd64", fmt, ##arg) 31 32 #define amd64_warn(fmt, arg...) \ 33 edac_printk(KERN_WARNING, "amd64", fmt, ##arg) 34 35 #define amd64_err(fmt, arg...) \ 36 edac_printk(KERN_ERR, "amd64", fmt, ##arg) 37 38 #define amd64_mc_warn(mci, fmt, arg...) \ 39 edac_mc_chipset_printk(mci, KERN_WARNING, "amd64", fmt, ##arg) 40 41 #define amd64_mc_err(mci, fmt, arg...) \ 42 edac_mc_chipset_printk(mci, KERN_ERR, "amd64", fmt, ##arg) 43 44 /* 45 * Throughout the comments in this code, the following terms are used: 46 * 47 * SysAddr, DramAddr, and InputAddr 48 * 49 * These terms come directly from the amd64 documentation 50 * (AMD publication #26094). They are defined as follows: 51 * 52 * SysAddr: 53 * This is a physical address generated by a CPU core or a device 54 * doing DMA. If generated by a CPU core, a SysAddr is the result of 55 * a virtual to physical address translation by the CPU core's address 56 * translation mechanism (MMU). 57 * 58 * DramAddr: 59 * A DramAddr is derived from a SysAddr by subtracting an offset that 60 * depends on which node the SysAddr maps to and whether the SysAddr 61 * is within a range affected by memory hoisting. The DRAM Base 62 * (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers 63 * determine which node a SysAddr maps to. 64 * 65 * If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr 66 * is within the range of addresses specified by this register, then 67 * a value x from the DHAR is subtracted from the SysAddr to produce a 68 * DramAddr. Here, x represents the base address for the node that 69 * the SysAddr maps to plus an offset due to memory hoisting. See 70 * section 3.4.8 and the comments in amd64_get_dram_hole_info() and 71 * sys_addr_to_dram_addr() below for more information. 72 * 73 * If the SysAddr is not affected by the DHAR then a value y is 74 * subtracted from the SysAddr to produce a DramAddr. Here, y is the 75 * base address for the node that the SysAddr maps to. See section 76 * 3.4.4 and the comments in sys_addr_to_dram_addr() below for more 77 * information. 78 * 79 * InputAddr: 80 * A DramAddr is translated to an InputAddr before being passed to the 81 * memory controller for the node that the DramAddr is associated 82 * with. The memory controller then maps the InputAddr to a csrow. 83 * If node interleaving is not in use, then the InputAddr has the same 84 * value as the DramAddr. Otherwise, the InputAddr is produced by 85 * discarding the bits used for node interleaving from the DramAddr. 86 * See section 3.4.4 for more information. 87 * 88 * The memory controller for a given node uses its DRAM CS Base and 89 * DRAM CS Mask registers to map an InputAddr to a csrow. See 90 * sections 3.5.4 and 3.5.5 for more information. 91 */ 92 93 #define EDAC_AMD64_VERSION "3.4.0" 94 #define EDAC_MOD_STR "amd64_edac" 95 96 /* Extended Model from CPUID, for CPU Revision numbers */ 97 #define K8_REV_D 1 98 #define K8_REV_E 2 99 #define K8_REV_F 4 100 101 /* Hardware limit on ChipSelect rows per MC and processors per system */ 102 #define NUM_CHIPSELECTS 8 103 #define DRAM_RANGES 8 104 105 #define ON true 106 #define OFF false 107 108 /* 109 * PCI-defined configuration space registers 110 */ 111 #define PCI_DEVICE_ID_AMD_15H_NB_F1 0x1601 112 #define PCI_DEVICE_ID_AMD_15H_NB_F2 0x1602 113 #define PCI_DEVICE_ID_AMD_15H_M30H_NB_F1 0x141b 114 #define PCI_DEVICE_ID_AMD_15H_M30H_NB_F2 0x141c 115 #define PCI_DEVICE_ID_AMD_15H_M60H_NB_F1 0x1571 116 #define PCI_DEVICE_ID_AMD_15H_M60H_NB_F2 0x1572 117 #define PCI_DEVICE_ID_AMD_16H_NB_F1 0x1531 118 #define PCI_DEVICE_ID_AMD_16H_NB_F2 0x1532 119 #define PCI_DEVICE_ID_AMD_16H_M30H_NB_F1 0x1581 120 #define PCI_DEVICE_ID_AMD_16H_M30H_NB_F2 0x1582 121 122 /* 123 * Function 1 - Address Map 124 */ 125 #define DRAM_BASE_LO 0x40 126 #define DRAM_LIMIT_LO 0x44 127 128 /* 129 * F15 M30h D18F1x2[1C:00] 130 */ 131 #define DRAM_CONT_BASE 0x200 132 #define DRAM_CONT_LIMIT 0x204 133 134 /* 135 * F15 M30h D18F1x2[4C:40] 136 */ 137 #define DRAM_CONT_HIGH_OFF 0x240 138 139 #define dram_rw(pvt, i) ((u8)(pvt->ranges[i].base.lo & 0x3)) 140 #define dram_intlv_sel(pvt, i) ((u8)((pvt->ranges[i].lim.lo >> 8) & 0x7)) 141 #define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7)) 142 143 #define DHAR 0xf0 144 #define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1)) 145 #define dhar_base(pvt) ((pvt)->dhar & 0xff000000) 146 #define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16) 147 148 /* NOTE: Extra mask bit vs K8 */ 149 #define f10_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff80) << 16) 150 151 #define DCT_CFG_SEL 0x10C 152 153 #define DRAM_LOCAL_NODE_BASE 0x120 154 #define DRAM_LOCAL_NODE_LIM 0x124 155 156 #define DRAM_BASE_HI 0x140 157 #define DRAM_LIMIT_HI 0x144 158 159 160 /* 161 * Function 2 - DRAM controller 162 */ 163 #define DCSB0 0x40 164 #define DCSB1 0x140 165 #define DCSB_CS_ENABLE BIT(0) 166 167 #define DCSM0 0x60 168 #define DCSM1 0x160 169 170 #define csrow_enabled(i, dct, pvt) ((pvt)->csels[(dct)].csbases[(i)] & DCSB_CS_ENABLE) 171 172 #define DRAM_CONTROL 0x78 173 174 #define DBAM0 0x80 175 #define DBAM1 0x180 176 177 /* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */ 178 #define DBAM_DIMM(i, reg) ((((reg) >> (4*(i)))) & 0xF) 179 180 #define DBAM_MAX_VALUE 11 181 182 #define DCLR0 0x90 183 #define DCLR1 0x190 184 #define REVE_WIDTH_128 BIT(16) 185 #define WIDTH_128 BIT(11) 186 187 #define DCHR0 0x94 188 #define DCHR1 0x194 189 #define DDR3_MODE BIT(8) 190 191 #define DCT_SEL_LO 0x110 192 #define dct_high_range_enabled(pvt) ((pvt)->dct_sel_lo & BIT(0)) 193 #define dct_interleave_enabled(pvt) ((pvt)->dct_sel_lo & BIT(2)) 194 195 #define dct_ganging_enabled(pvt) ((boot_cpu_data.x86 == 0x10) && ((pvt)->dct_sel_lo & BIT(4))) 196 197 #define dct_data_intlv_enabled(pvt) ((pvt)->dct_sel_lo & BIT(5)) 198 #define dct_memory_cleared(pvt) ((pvt)->dct_sel_lo & BIT(10)) 199 200 #define SWAP_INTLV_REG 0x10c 201 202 #define DCT_SEL_HI 0x114 203 204 #define F15H_M60H_SCRCTRL 0x1C8 205 206 /* 207 * Function 3 - Misc Control 208 */ 209 #define NBCTL 0x40 210 211 #define NBCFG 0x44 212 #define NBCFG_CHIPKILL BIT(23) 213 #define NBCFG_ECC_ENABLE BIT(22) 214 215 /* F3x48: NBSL */ 216 #define F10_NBSL_EXT_ERR_ECC 0x8 217 #define NBSL_PP_OBS 0x2 218 219 #define SCRCTRL 0x58 220 221 #define F10_ONLINE_SPARE 0xB0 222 #define online_spare_swap_done(pvt, c) (((pvt)->online_spare >> (1 + 2 * (c))) & 0x1) 223 #define online_spare_bad_dramcs(pvt, c) (((pvt)->online_spare >> (4 + 4 * (c))) & 0x7) 224 225 #define F10_NB_ARRAY_ADDR 0xB8 226 #define F10_NB_ARRAY_DRAM BIT(31) 227 228 /* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */ 229 #define SET_NB_ARRAY_ADDR(section) (((section) & 0x3) << 1) 230 231 #define F10_NB_ARRAY_DATA 0xBC 232 #define F10_NB_ARR_ECC_WR_REQ BIT(17) 233 #define SET_NB_DRAM_INJECTION_WRITE(inj) \ 234 (BIT(((inj.word) & 0xF) + 20) | \ 235 F10_NB_ARR_ECC_WR_REQ | inj.bit_map) 236 #define SET_NB_DRAM_INJECTION_READ(inj) \ 237 (BIT(((inj.word) & 0xF) + 20) | \ 238 BIT(16) | inj.bit_map) 239 240 241 #define NBCAP 0xE8 242 #define NBCAP_CHIPKILL BIT(4) 243 #define NBCAP_SECDED BIT(3) 244 #define NBCAP_DCT_DUAL BIT(0) 245 246 #define EXT_NB_MCA_CFG 0x180 247 248 /* MSRs */ 249 #define MSR_MCGCTL_NBE BIT(4) 250 251 enum amd_families { 252 K8_CPUS = 0, 253 F10_CPUS, 254 F15_CPUS, 255 F15_M30H_CPUS, 256 F15_M60H_CPUS, 257 F16_CPUS, 258 F16_M30H_CPUS, 259 NUM_FAMILIES, 260 }; 261 262 /* Error injection control structure */ 263 struct error_injection { 264 u32 section; 265 u32 word; 266 u32 bit_map; 267 }; 268 269 /* low and high part of PCI config space regs */ 270 struct reg_pair { 271 u32 lo, hi; 272 }; 273 274 /* 275 * See F1x[1, 0][7C:40] DRAM Base/Limit Registers 276 */ 277 struct dram_range { 278 struct reg_pair base; 279 struct reg_pair lim; 280 }; 281 282 /* A DCT chip selects collection */ 283 struct chip_select { 284 u32 csbases[NUM_CHIPSELECTS]; 285 u8 b_cnt; 286 287 u32 csmasks[NUM_CHIPSELECTS]; 288 u8 m_cnt; 289 }; 290 291 struct amd64_pvt { 292 struct low_ops *ops; 293 294 /* pci_device handles which we utilize */ 295 struct pci_dev *F1, *F2, *F3; 296 297 u16 mc_node_id; /* MC index of this MC node */ 298 u8 fam; /* CPU family */ 299 u8 model; /* ... model */ 300 u8 stepping; /* ... stepping */ 301 302 int ext_model; /* extended model value of this node */ 303 int channel_count; 304 305 /* Raw registers */ 306 u32 dclr0; /* DRAM Configuration Low DCT0 reg */ 307 u32 dclr1; /* DRAM Configuration Low DCT1 reg */ 308 u32 dchr0; /* DRAM Configuration High DCT0 reg */ 309 u32 dchr1; /* DRAM Configuration High DCT1 reg */ 310 u32 nbcap; /* North Bridge Capabilities */ 311 u32 nbcfg; /* F10 North Bridge Configuration */ 312 u32 ext_nbcfg; /* Extended F10 North Bridge Configuration */ 313 u32 dhar; /* DRAM Hoist reg */ 314 u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */ 315 u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */ 316 317 /* one for each DCT */ 318 struct chip_select csels[2]; 319 320 /* DRAM base and limit pairs F1x[78,70,68,60,58,50,48,40] */ 321 struct dram_range ranges[DRAM_RANGES]; 322 323 u64 top_mem; /* top of memory below 4GB */ 324 u64 top_mem2; /* top of memory above 4GB */ 325 326 u32 dct_sel_lo; /* DRAM Controller Select Low */ 327 u32 dct_sel_hi; /* DRAM Controller Select High */ 328 u32 online_spare; /* On-Line spare Reg */ 329 330 /* x4 or x8 syndromes in use */ 331 u8 ecc_sym_sz; 332 333 /* place to store error injection parameters prior to issue */ 334 struct error_injection injection; 335 336 /* cache the dram_type */ 337 enum mem_type dram_type; 338 }; 339 340 enum err_codes { 341 DECODE_OK = 0, 342 ERR_NODE = -1, 343 ERR_CSROW = -2, 344 ERR_CHANNEL = -3, 345 }; 346 347 struct err_info { 348 int err_code; 349 struct mem_ctl_info *src_mci; 350 int csrow; 351 int channel; 352 u16 syndrome; 353 u32 page; 354 u32 offset; 355 }; 356 357 static inline u64 get_dram_base(struct amd64_pvt *pvt, u8 i) 358 { 359 u64 addr = ((u64)pvt->ranges[i].base.lo & 0xffff0000) << 8; 360 361 if (boot_cpu_data.x86 == 0xf) 362 return addr; 363 364 return (((u64)pvt->ranges[i].base.hi & 0x000000ff) << 40) | addr; 365 } 366 367 static inline u64 get_dram_limit(struct amd64_pvt *pvt, u8 i) 368 { 369 u64 lim = (((u64)pvt->ranges[i].lim.lo & 0xffff0000) << 8) | 0x00ffffff; 370 371 if (boot_cpu_data.x86 == 0xf) 372 return lim; 373 374 return (((u64)pvt->ranges[i].lim.hi & 0x000000ff) << 40) | lim; 375 } 376 377 static inline u16 extract_syndrome(u64 status) 378 { 379 return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00); 380 } 381 382 static inline u8 dct_sel_interleave_addr(struct amd64_pvt *pvt) 383 { 384 if (pvt->fam == 0x15 && pvt->model >= 0x30) 385 return (((pvt->dct_sel_hi >> 9) & 0x1) << 2) | 386 ((pvt->dct_sel_lo >> 6) & 0x3); 387 388 return ((pvt)->dct_sel_lo >> 6) & 0x3; 389 } 390 /* 391 * per-node ECC settings descriptor 392 */ 393 struct ecc_settings { 394 u32 old_nbctl; 395 bool nbctl_valid; 396 397 struct flags { 398 unsigned long nb_mce_enable:1; 399 unsigned long nb_ecc_prev:1; 400 } flags; 401 }; 402 403 #ifdef CONFIG_EDAC_DEBUG 404 extern const struct attribute_group amd64_edac_dbg_group; 405 #endif 406 407 #ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION 408 extern const struct attribute_group amd64_edac_inj_group; 409 #endif 410 411 /* 412 * Each of the PCI Device IDs types have their own set of hardware accessor 413 * functions and per device encoding/decoding logic. 414 */ 415 struct low_ops { 416 int (*early_channel_count) (struct amd64_pvt *pvt); 417 void (*map_sysaddr_to_csrow) (struct mem_ctl_info *mci, u64 sys_addr, 418 struct err_info *); 419 int (*dbam_to_cs) (struct amd64_pvt *pvt, u8 dct, 420 unsigned cs_mode, int cs_mask_nr); 421 }; 422 423 struct amd64_family_type { 424 const char *ctl_name; 425 u16 f1_id, f3_id; 426 struct low_ops ops; 427 }; 428 429 int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset, 430 u32 *val, const char *func); 431 int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset, 432 u32 val, const char *func); 433 434 #define amd64_read_pci_cfg(pdev, offset, val) \ 435 __amd64_read_pci_cfg_dword(pdev, offset, val, __func__) 436 437 #define amd64_write_pci_cfg(pdev, offset, val) \ 438 __amd64_write_pci_cfg_dword(pdev, offset, val, __func__) 439 440 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base, 441 u64 *hole_offset, u64 *hole_size); 442 443 #define to_mci(k) container_of(k, struct mem_ctl_info, dev) 444 445 /* Injection helpers */ 446 static inline void disable_caches(void *dummy) 447 { 448 write_cr0(read_cr0() | X86_CR0_CD); 449 wbinvd(); 450 } 451 452 static inline void enable_caches(void *dummy) 453 { 454 write_cr0(read_cr0() & ~X86_CR0_CD); 455 } 456 457 static inline u8 dram_intlv_en(struct amd64_pvt *pvt, unsigned int i) 458 { 459 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 460 u32 tmp; 461 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &tmp); 462 return (u8) tmp & 0xF; 463 } 464 return (u8) (pvt->ranges[i].base.lo >> 8) & 0x7; 465 } 466 467 static inline u8 dhar_valid(struct amd64_pvt *pvt) 468 { 469 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 470 u32 tmp; 471 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp); 472 return (tmp >> 1) & BIT(0); 473 } 474 return (pvt)->dhar & BIT(0); 475 } 476 477 static inline u32 dct_sel_baseaddr(struct amd64_pvt *pvt) 478 { 479 if (pvt->fam == 0x15 && pvt->model >= 0x30) { 480 u32 tmp; 481 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp); 482 return (tmp >> 11) & 0x1FFF; 483 } 484 return (pvt)->dct_sel_lo & 0xFFFFF800; 485 } 486