1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for Intel(R) 10nm server memory controller. 4 * Copyright (c) 2019, Intel Corporation. 5 * 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/io.h> 10 #include <asm/cpu_device_id.h> 11 #include <asm/intel-family.h> 12 #include <asm/mce.h> 13 #include "edac_module.h" 14 #include "skx_common.h" 15 16 #define I10NM_REVISION "v0.0.6" 17 #define EDAC_MOD_STR "i10nm_edac" 18 19 /* Debug macros */ 20 #define i10nm_printk(level, fmt, arg...) \ 21 edac_printk(level, "i10nm", fmt, ##arg) 22 23 #define I10NM_GET_SCK_BAR(d, reg) \ 24 pci_read_config_dword((d)->uracu, 0xd0, &(reg)) 25 #define I10NM_GET_IMC_BAR(d, i, reg) \ 26 pci_read_config_dword((d)->uracu, \ 27 (res_cfg->type == GNR ? 0xd4 : 0xd8) + (i) * 4, &(reg)) 28 #define I10NM_GET_SAD(d, offset, i, reg)\ 29 pci_read_config_dword((d)->sad_all, (offset) + (i) * \ 30 (res_cfg->type == GNR ? 12 : 8), &(reg)) 31 #define I10NM_GET_HBM_IMC_BAR(d, reg) \ 32 pci_read_config_dword((d)->uracu, 0xd4, &(reg)) 33 #define I10NM_GET_CAPID3_CFG(d, reg) \ 34 pci_read_config_dword((d)->pcu_cr3, \ 35 res_cfg->type == GNR ? 0x290 : 0x90, &(reg)) 36 #define I10NM_GET_CAPID5_CFG(d, reg) \ 37 pci_read_config_dword((d)->pcu_cr3, \ 38 res_cfg->type == GNR ? 0x298 : 0x98, &(reg)) 39 #define I10NM_GET_DIMMMTR(m, i, j) \ 40 readl((m)->mbase + ((m)->hbm_mc ? 0x80c : \ 41 (res_cfg->type == GNR ? 0xc0c : 0x2080c)) + \ 42 (i) * (m)->chan_mmio_sz + (j) * 4) 43 #define I10NM_GET_MCDDRTCFG(m, i) \ 44 readl((m)->mbase + ((m)->hbm_mc ? 0x970 : 0x20970) + \ 45 (i) * (m)->chan_mmio_sz) 46 #define I10NM_GET_MCMTR(m, i) \ 47 readl((m)->mbase + ((m)->hbm_mc ? 0xef8 : \ 48 (res_cfg->type == GNR ? 0xaf8 : 0x20ef8)) + \ 49 (i) * (m)->chan_mmio_sz) 50 #define I10NM_GET_AMAP(m, i) \ 51 readl((m)->mbase + ((m)->hbm_mc ? 0x814 : \ 52 (res_cfg->type == GNR ? 0xc14 : 0x20814)) + \ 53 (i) * (m)->chan_mmio_sz) 54 #define I10NM_GET_REG32(m, i, offset) \ 55 readl((m)->mbase + (i) * (m)->chan_mmio_sz + (offset)) 56 #define I10NM_GET_REG64(m, i, offset) \ 57 readq((m)->mbase + (i) * (m)->chan_mmio_sz + (offset)) 58 #define I10NM_SET_REG32(m, i, offset, v) \ 59 writel(v, (m)->mbase + (i) * (m)->chan_mmio_sz + (offset)) 60 61 #define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23) 62 #define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12) 63 #define I10NM_GET_IMC_MMIO_SIZE(reg) ((GET_BITFIELD(reg, 13, 23) - \ 64 GET_BITFIELD(reg, 0, 10) + 1) << 12) 65 #define I10NM_GET_HBM_IMC_MMIO_OFFSET(reg) \ 66 ((GET_BITFIELD(reg, 0, 10) << 12) + 0x140000) 67 68 #define I10NM_GNR_IMC_MMIO_OFFSET 0x24c000 69 #define I10NM_GNR_IMC_MMIO_SIZE 0x4000 70 #define I10NM_HBM_IMC_MMIO_SIZE 0x9000 71 #define I10NM_DDR_IMC_CH_CNT(reg) GET_BITFIELD(reg, 21, 24) 72 #define I10NM_IS_HBM_PRESENT(reg) GET_BITFIELD(reg, 27, 30) 73 #define I10NM_IS_HBM_IMC(reg) GET_BITFIELD(reg, 29, 29) 74 75 #define I10NM_MAX_SAD 16 76 #define I10NM_SAD_ENABLE(reg) GET_BITFIELD(reg, 0, 0) 77 #define I10NM_SAD_NM_CACHEABLE(reg) GET_BITFIELD(reg, 5, 5) 78 79 #define RETRY_RD_ERR_LOG_UC BIT(1) 80 #define RETRY_RD_ERR_LOG_NOOVER BIT(14) 81 #define RETRY_RD_ERR_LOG_EN BIT(15) 82 #define RETRY_RD_ERR_LOG_NOOVER_UC (BIT(14) | BIT(1)) 83 #define RETRY_RD_ERR_LOG_OVER_UC_V (BIT(2) | BIT(1) | BIT(0)) 84 85 static struct list_head *i10nm_edac_list; 86 87 static struct res_config *res_cfg; 88 static int retry_rd_err_log; 89 static int decoding_via_mca; 90 static bool mem_cfg_2lm; 91 92 static u32 offsets_scrub_icx[] = {0x22c60, 0x22c54, 0x22c5c, 0x22c58, 0x22c28, 0x20ed8}; 93 static u32 offsets_scrub_spr[] = {0x22c60, 0x22c54, 0x22f08, 0x22c58, 0x22c28, 0x20ed8}; 94 static u32 offsets_scrub_spr_hbm0[] = {0x2860, 0x2854, 0x2b08, 0x2858, 0x2828, 0x0ed8}; 95 static u32 offsets_scrub_spr_hbm1[] = {0x2c60, 0x2c54, 0x2f08, 0x2c58, 0x2c28, 0x0fa8}; 96 static u32 offsets_demand_icx[] = {0x22e54, 0x22e60, 0x22e64, 0x22e58, 0x22e5c, 0x20ee0}; 97 static u32 offsets_demand_spr[] = {0x22e54, 0x22e60, 0x22f10, 0x22e58, 0x22e5c, 0x20ee0}; 98 static u32 offsets_demand2_spr[] = {0x22c70, 0x22d80, 0x22f18, 0x22d58, 0x22c64, 0x20f10}; 99 static u32 offsets_demand_spr_hbm0[] = {0x2a54, 0x2a60, 0x2b10, 0x2a58, 0x2a5c, 0x0ee0}; 100 static u32 offsets_demand_spr_hbm1[] = {0x2e54, 0x2e60, 0x2f10, 0x2e58, 0x2e5c, 0x0fb0}; 101 102 static void __enable_retry_rd_err_log(struct skx_imc *imc, int chan, bool enable, 103 u32 *offsets_scrub, u32 *offsets_demand, 104 u32 *offsets_demand2) 105 { 106 u32 s, d, d2; 107 108 s = I10NM_GET_REG32(imc, chan, offsets_scrub[0]); 109 d = I10NM_GET_REG32(imc, chan, offsets_demand[0]); 110 if (offsets_demand2) 111 d2 = I10NM_GET_REG32(imc, chan, offsets_demand2[0]); 112 113 if (enable) { 114 /* Save default configurations */ 115 imc->chan[chan].retry_rd_err_log_s = s; 116 imc->chan[chan].retry_rd_err_log_d = d; 117 if (offsets_demand2) 118 imc->chan[chan].retry_rd_err_log_d2 = d2; 119 120 s &= ~RETRY_RD_ERR_LOG_NOOVER_UC; 121 s |= RETRY_RD_ERR_LOG_EN; 122 d &= ~RETRY_RD_ERR_LOG_NOOVER_UC; 123 d |= RETRY_RD_ERR_LOG_EN; 124 125 if (offsets_demand2) { 126 d2 &= ~RETRY_RD_ERR_LOG_UC; 127 d2 |= RETRY_RD_ERR_LOG_NOOVER; 128 d2 |= RETRY_RD_ERR_LOG_EN; 129 } 130 } else { 131 /* Restore default configurations */ 132 if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_UC) 133 s |= RETRY_RD_ERR_LOG_UC; 134 if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_NOOVER) 135 s |= RETRY_RD_ERR_LOG_NOOVER; 136 if (!(imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_EN)) 137 s &= ~RETRY_RD_ERR_LOG_EN; 138 if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_UC) 139 d |= RETRY_RD_ERR_LOG_UC; 140 if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_NOOVER) 141 d |= RETRY_RD_ERR_LOG_NOOVER; 142 if (!(imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_EN)) 143 d &= ~RETRY_RD_ERR_LOG_EN; 144 145 if (offsets_demand2) { 146 if (imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_UC) 147 d2 |= RETRY_RD_ERR_LOG_UC; 148 if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_NOOVER)) 149 d2 &= ~RETRY_RD_ERR_LOG_NOOVER; 150 if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_EN)) 151 d2 &= ~RETRY_RD_ERR_LOG_EN; 152 } 153 } 154 155 I10NM_SET_REG32(imc, chan, offsets_scrub[0], s); 156 I10NM_SET_REG32(imc, chan, offsets_demand[0], d); 157 if (offsets_demand2) 158 I10NM_SET_REG32(imc, chan, offsets_demand2[0], d2); 159 } 160 161 static void enable_retry_rd_err_log(bool enable) 162 { 163 int i, j, imc_num, chan_num; 164 struct skx_imc *imc; 165 struct skx_dev *d; 166 167 edac_dbg(2, "\n"); 168 169 list_for_each_entry(d, i10nm_edac_list, list) { 170 imc_num = res_cfg->ddr_imc_num; 171 chan_num = res_cfg->ddr_chan_num; 172 173 for (i = 0; i < imc_num; i++) { 174 imc = &d->imc[i]; 175 if (!imc->mbase) 176 continue; 177 178 for (j = 0; j < chan_num; j++) 179 __enable_retry_rd_err_log(imc, j, enable, 180 res_cfg->offsets_scrub, 181 res_cfg->offsets_demand, 182 res_cfg->offsets_demand2); 183 } 184 185 imc_num += res_cfg->hbm_imc_num; 186 chan_num = res_cfg->hbm_chan_num; 187 188 for (; i < imc_num; i++) { 189 imc = &d->imc[i]; 190 if (!imc->mbase || !imc->hbm_mc) 191 continue; 192 193 for (j = 0; j < chan_num; j++) { 194 __enable_retry_rd_err_log(imc, j, enable, 195 res_cfg->offsets_scrub_hbm0, 196 res_cfg->offsets_demand_hbm0, 197 NULL); 198 __enable_retry_rd_err_log(imc, j, enable, 199 res_cfg->offsets_scrub_hbm1, 200 res_cfg->offsets_demand_hbm1, 201 NULL); 202 } 203 } 204 } 205 } 206 207 static void show_retry_rd_err_log(struct decoded_addr *res, char *msg, 208 int len, bool scrub_err) 209 { 210 struct skx_imc *imc = &res->dev->imc[res->imc]; 211 u32 log0, log1, log2, log3, log4; 212 u32 corr0, corr1, corr2, corr3; 213 u32 lxg0, lxg1, lxg3, lxg4; 214 u32 *xffsets = NULL; 215 u64 log2a, log5; 216 u64 lxg2a, lxg5; 217 u32 *offsets; 218 int n, pch; 219 220 if (!imc->mbase) 221 return; 222 223 if (imc->hbm_mc) { 224 pch = res->cs & 1; 225 226 if (pch) 227 offsets = scrub_err ? res_cfg->offsets_scrub_hbm1 : 228 res_cfg->offsets_demand_hbm1; 229 else 230 offsets = scrub_err ? res_cfg->offsets_scrub_hbm0 : 231 res_cfg->offsets_demand_hbm0; 232 } else { 233 if (scrub_err) { 234 offsets = res_cfg->offsets_scrub; 235 } else { 236 offsets = res_cfg->offsets_demand; 237 xffsets = res_cfg->offsets_demand2; 238 } 239 } 240 241 log0 = I10NM_GET_REG32(imc, res->channel, offsets[0]); 242 log1 = I10NM_GET_REG32(imc, res->channel, offsets[1]); 243 log3 = I10NM_GET_REG32(imc, res->channel, offsets[3]); 244 log4 = I10NM_GET_REG32(imc, res->channel, offsets[4]); 245 log5 = I10NM_GET_REG64(imc, res->channel, offsets[5]); 246 247 if (xffsets) { 248 lxg0 = I10NM_GET_REG32(imc, res->channel, xffsets[0]); 249 lxg1 = I10NM_GET_REG32(imc, res->channel, xffsets[1]); 250 lxg3 = I10NM_GET_REG32(imc, res->channel, xffsets[3]); 251 lxg4 = I10NM_GET_REG32(imc, res->channel, xffsets[4]); 252 lxg5 = I10NM_GET_REG64(imc, res->channel, xffsets[5]); 253 } 254 255 if (res_cfg->type == SPR) { 256 log2a = I10NM_GET_REG64(imc, res->channel, offsets[2]); 257 n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.16llx %.8x %.8x %.16llx", 258 log0, log1, log2a, log3, log4, log5); 259 260 if (len - n > 0) { 261 if (xffsets) { 262 lxg2a = I10NM_GET_REG64(imc, res->channel, xffsets[2]); 263 n += snprintf(msg + n, len - n, " %.8x %.8x %.16llx %.8x %.8x %.16llx]", 264 lxg0, lxg1, lxg2a, lxg3, lxg4, lxg5); 265 } else { 266 n += snprintf(msg + n, len - n, "]"); 267 } 268 } 269 } else { 270 log2 = I10NM_GET_REG32(imc, res->channel, offsets[2]); 271 n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.8x %.8x %.8x %.16llx]", 272 log0, log1, log2, log3, log4, log5); 273 } 274 275 if (imc->hbm_mc) { 276 if (pch) { 277 corr0 = I10NM_GET_REG32(imc, res->channel, 0x2c18); 278 corr1 = I10NM_GET_REG32(imc, res->channel, 0x2c1c); 279 corr2 = I10NM_GET_REG32(imc, res->channel, 0x2c20); 280 corr3 = I10NM_GET_REG32(imc, res->channel, 0x2c24); 281 } else { 282 corr0 = I10NM_GET_REG32(imc, res->channel, 0x2818); 283 corr1 = I10NM_GET_REG32(imc, res->channel, 0x281c); 284 corr2 = I10NM_GET_REG32(imc, res->channel, 0x2820); 285 corr3 = I10NM_GET_REG32(imc, res->channel, 0x2824); 286 } 287 } else { 288 corr0 = I10NM_GET_REG32(imc, res->channel, 0x22c18); 289 corr1 = I10NM_GET_REG32(imc, res->channel, 0x22c1c); 290 corr2 = I10NM_GET_REG32(imc, res->channel, 0x22c20); 291 corr3 = I10NM_GET_REG32(imc, res->channel, 0x22c24); 292 } 293 294 if (len - n > 0) 295 snprintf(msg + n, len - n, 296 " correrrcnt[%.4x %.4x %.4x %.4x %.4x %.4x %.4x %.4x]", 297 corr0 & 0xffff, corr0 >> 16, 298 corr1 & 0xffff, corr1 >> 16, 299 corr2 & 0xffff, corr2 >> 16, 300 corr3 & 0xffff, corr3 >> 16); 301 302 /* Clear status bits */ 303 if (retry_rd_err_log == 2) { 304 if (log0 & RETRY_RD_ERR_LOG_OVER_UC_V) { 305 log0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V; 306 I10NM_SET_REG32(imc, res->channel, offsets[0], log0); 307 } 308 309 if (xffsets && (lxg0 & RETRY_RD_ERR_LOG_OVER_UC_V)) { 310 lxg0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V; 311 I10NM_SET_REG32(imc, res->channel, xffsets[0], lxg0); 312 } 313 } 314 } 315 316 static struct pci_dev *pci_get_dev_wrapper(int dom, unsigned int bus, 317 unsigned int dev, unsigned int fun) 318 { 319 struct pci_dev *pdev; 320 321 pdev = pci_get_domain_bus_and_slot(dom, bus, PCI_DEVFN(dev, fun)); 322 if (!pdev) { 323 edac_dbg(2, "No device %02x:%02x.%x\n", 324 bus, dev, fun); 325 return NULL; 326 } 327 328 if (unlikely(pci_enable_device(pdev) < 0)) { 329 edac_dbg(2, "Failed to enable device %02x:%02x.%x\n", 330 bus, dev, fun); 331 pci_dev_put(pdev); 332 return NULL; 333 } 334 335 return pdev; 336 } 337 338 /** 339 * i10nm_get_imc_num() - Get the number of present DDR memory controllers. 340 * 341 * @cfg : The pointer to the structure of EDAC resource configurations. 342 * 343 * For Granite Rapids CPUs, the number of present DDR memory controllers read 344 * at runtime overwrites the value statically configured in @cfg->ddr_imc_num. 345 * For other CPUs, the number of present DDR memory controllers is statically 346 * configured in @cfg->ddr_imc_num. 347 * 348 * RETURNS : 0 on success, < 0 on failure. 349 */ 350 static int i10nm_get_imc_num(struct res_config *cfg) 351 { 352 int n, imc_num, chan_num = 0; 353 struct skx_dev *d; 354 u32 reg; 355 356 list_for_each_entry(d, i10nm_edac_list, list) { 357 d->pcu_cr3 = pci_get_dev_wrapper(d->seg, d->bus[res_cfg->pcu_cr3_bdf.bus], 358 res_cfg->pcu_cr3_bdf.dev, 359 res_cfg->pcu_cr3_bdf.fun); 360 if (!d->pcu_cr3) 361 continue; 362 363 if (I10NM_GET_CAPID5_CFG(d, reg)) 364 continue; 365 366 n = I10NM_DDR_IMC_CH_CNT(reg); 367 368 if (!chan_num) { 369 chan_num = n; 370 edac_dbg(2, "Get DDR CH number: %d\n", chan_num); 371 } else if (chan_num != n) { 372 i10nm_printk(KERN_NOTICE, "Get DDR CH numbers: %d, %d\n", chan_num, n); 373 } 374 } 375 376 switch (cfg->type) { 377 case GNR: 378 /* 379 * One channel per DDR memory controller for Granite Rapids CPUs. 380 */ 381 imc_num = chan_num; 382 383 if (!imc_num) { 384 i10nm_printk(KERN_ERR, "Invalid DDR MC number\n"); 385 return -ENODEV; 386 } 387 388 if (imc_num > I10NM_NUM_DDR_IMC) { 389 i10nm_printk(KERN_ERR, "Need to make I10NM_NUM_DDR_IMC >= %d\n", imc_num); 390 return -EINVAL; 391 } 392 393 if (cfg->ddr_imc_num != imc_num) { 394 /* 395 * Store the number of present DDR memory controllers. 396 */ 397 cfg->ddr_imc_num = imc_num; 398 edac_dbg(2, "Set DDR MC number: %d", imc_num); 399 } 400 401 return 0; 402 default: 403 /* 404 * For other CPUs, the number of present DDR memory controllers 405 * is statically pre-configured in cfg->ddr_imc_num. 406 */ 407 return 0; 408 } 409 } 410 411 static bool i10nm_check_2lm(struct res_config *cfg) 412 { 413 struct skx_dev *d; 414 u32 reg; 415 int i; 416 417 list_for_each_entry(d, i10nm_edac_list, list) { 418 d->sad_all = pci_get_dev_wrapper(d->seg, d->bus[res_cfg->sad_all_bdf.bus], 419 res_cfg->sad_all_bdf.dev, 420 res_cfg->sad_all_bdf.fun); 421 if (!d->sad_all) 422 continue; 423 424 for (i = 0; i < I10NM_MAX_SAD; i++) { 425 I10NM_GET_SAD(d, cfg->sad_all_offset, i, reg); 426 if (I10NM_SAD_ENABLE(reg) && I10NM_SAD_NM_CACHEABLE(reg)) { 427 edac_dbg(2, "2-level memory configuration.\n"); 428 return true; 429 } 430 } 431 } 432 433 return false; 434 } 435 436 /* 437 * Check whether the error comes from DDRT by ICX/Tremont/SPR model specific error code. 438 * Refer to SDM vol3B 17.11.3/17.13.2 Intel IMC MC error codes for IA32_MCi_STATUS. 439 */ 440 static bool i10nm_mscod_is_ddrt(u32 mscod) 441 { 442 switch (res_cfg->type) { 443 case I10NM: 444 switch (mscod) { 445 case 0x0106: case 0x0107: 446 case 0x0800: case 0x0804: 447 case 0x0806 ... 0x0808: 448 case 0x080a ... 0x080e: 449 case 0x0810: case 0x0811: 450 case 0x0816: case 0x081e: 451 case 0x081f: 452 return true; 453 } 454 455 break; 456 case SPR: 457 switch (mscod) { 458 case 0x0800: case 0x0804: 459 case 0x0806 ... 0x0808: 460 case 0x080a ... 0x080e: 461 case 0x0810: case 0x0811: 462 case 0x0816: case 0x081e: 463 case 0x081f: 464 return true; 465 } 466 467 break; 468 default: 469 return false; 470 } 471 472 return false; 473 } 474 475 static bool i10nm_mc_decode_available(struct mce *mce) 476 { 477 #define ICX_IMCx_CHy 0x06666000 478 u8 bank; 479 480 if (!decoding_via_mca || mem_cfg_2lm) 481 return false; 482 483 if ((mce->status & (MCI_STATUS_MISCV | MCI_STATUS_ADDRV)) 484 != (MCI_STATUS_MISCV | MCI_STATUS_ADDRV)) 485 return false; 486 487 bank = mce->bank; 488 489 switch (res_cfg->type) { 490 case I10NM: 491 /* Check whether the bank is one of {13,14,17,18,21,22,25,26} */ 492 if (!(ICX_IMCx_CHy & (1 << bank))) 493 return false; 494 break; 495 case SPR: 496 if (bank < 13 || bank > 20) 497 return false; 498 break; 499 default: 500 return false; 501 } 502 503 /* DDRT errors can't be decoded from MCA bank registers */ 504 if (MCI_MISC_ECC_MODE(mce->misc) == MCI_MISC_ECC_DDRT) 505 return false; 506 507 if (i10nm_mscod_is_ddrt(MCI_STATUS_MSCOD(mce->status))) 508 return false; 509 510 return true; 511 } 512 513 static bool i10nm_mc_decode(struct decoded_addr *res) 514 { 515 struct mce *m = res->mce; 516 struct skx_dev *d; 517 u8 bank; 518 519 if (!i10nm_mc_decode_available(m)) 520 return false; 521 522 list_for_each_entry(d, i10nm_edac_list, list) { 523 if (d->imc[0].src_id == m->socketid) { 524 res->socket = m->socketid; 525 res->dev = d; 526 break; 527 } 528 } 529 530 switch (res_cfg->type) { 531 case I10NM: 532 bank = m->bank - 13; 533 res->imc = bank / 4; 534 res->channel = bank % 2; 535 res->column = GET_BITFIELD(m->misc, 9, 18) << 2; 536 res->row = GET_BITFIELD(m->misc, 19, 39); 537 res->bank_group = GET_BITFIELD(m->misc, 40, 41); 538 res->bank_address = GET_BITFIELD(m->misc, 42, 43); 539 res->bank_group |= GET_BITFIELD(m->misc, 44, 44) << 2; 540 res->rank = GET_BITFIELD(m->misc, 56, 58); 541 res->dimm = res->rank >> 2; 542 res->rank = res->rank % 4; 543 break; 544 case SPR: 545 bank = m->bank - 13; 546 res->imc = bank / 2; 547 res->channel = bank % 2; 548 res->column = GET_BITFIELD(m->misc, 9, 18) << 2; 549 res->row = GET_BITFIELD(m->misc, 19, 36); 550 res->bank_group = GET_BITFIELD(m->misc, 37, 38); 551 res->bank_address = GET_BITFIELD(m->misc, 39, 40); 552 res->bank_group |= GET_BITFIELD(m->misc, 41, 41) << 2; 553 res->rank = GET_BITFIELD(m->misc, 57, 57); 554 res->dimm = GET_BITFIELD(m->misc, 58, 58); 555 break; 556 default: 557 return false; 558 } 559 560 if (!res->dev) { 561 skx_printk(KERN_ERR, "No device for src_id %d imc %d\n", 562 m->socketid, res->imc); 563 return false; 564 } 565 566 return true; 567 } 568 569 /** 570 * get_gnr_mdev() - Get the PCI device of the @logical_idx-th DDR memory controller. 571 * 572 * @d : The pointer to the structure of CPU socket EDAC device. 573 * @logical_idx : The logical index of the present memory controller (0 ~ max present MC# - 1). 574 * @physical_idx : To store the corresponding physical index of @logical_idx. 575 * 576 * RETURNS : The PCI device of the @logical_idx-th DDR memory controller, NULL on failure. 577 */ 578 static struct pci_dev *get_gnr_mdev(struct skx_dev *d, int logical_idx, int *physical_idx) 579 { 580 #define GNR_MAX_IMC_PCI_CNT 28 581 582 struct pci_dev *mdev; 583 int i, logical = 0; 584 585 /* 586 * Detect present memory controllers from { PCI device: 8-5, function 7-1 } 587 */ 588 for (i = 0; i < GNR_MAX_IMC_PCI_CNT; i++) { 589 mdev = pci_get_dev_wrapper(d->seg, 590 d->bus[res_cfg->ddr_mdev_bdf.bus], 591 res_cfg->ddr_mdev_bdf.dev + i / 7, 592 res_cfg->ddr_mdev_bdf.fun + i % 7); 593 594 if (mdev) { 595 if (logical == logical_idx) { 596 *physical_idx = i; 597 return mdev; 598 } 599 600 pci_dev_put(mdev); 601 logical++; 602 } 603 } 604 605 return NULL; 606 } 607 608 /** 609 * get_ddr_munit() - Get the resource of the i-th DDR memory controller. 610 * 611 * @d : The pointer to the structure of CPU socket EDAC device. 612 * @i : The index of the CPU socket relative DDR memory controller. 613 * @offset : To store the MMIO offset of the i-th DDR memory controller. 614 * @size : To store the MMIO size of the i-th DDR memory controller. 615 * 616 * RETURNS : The PCI device of the i-th DDR memory controller, NULL on failure. 617 */ 618 static struct pci_dev *get_ddr_munit(struct skx_dev *d, int i, u32 *offset, unsigned long *size) 619 { 620 struct pci_dev *mdev; 621 int physical_idx; 622 u32 reg; 623 624 switch (res_cfg->type) { 625 case GNR: 626 if (I10NM_GET_IMC_BAR(d, 0, reg)) { 627 i10nm_printk(KERN_ERR, "Failed to get mc0 bar\n"); 628 return NULL; 629 } 630 631 mdev = get_gnr_mdev(d, i, &physical_idx); 632 if (!mdev) 633 return NULL; 634 635 *offset = I10NM_GET_IMC_MMIO_OFFSET(reg) + 636 I10NM_GNR_IMC_MMIO_OFFSET + 637 physical_idx * I10NM_GNR_IMC_MMIO_SIZE; 638 *size = I10NM_GNR_IMC_MMIO_SIZE; 639 640 break; 641 default: 642 if (I10NM_GET_IMC_BAR(d, i, reg)) { 643 i10nm_printk(KERN_ERR, "Failed to get mc%d bar\n", i); 644 return NULL; 645 } 646 647 mdev = pci_get_dev_wrapper(d->seg, 648 d->bus[res_cfg->ddr_mdev_bdf.bus], 649 res_cfg->ddr_mdev_bdf.dev + i, 650 res_cfg->ddr_mdev_bdf.fun); 651 if (!mdev) 652 return NULL; 653 654 *offset = I10NM_GET_IMC_MMIO_OFFSET(reg); 655 *size = I10NM_GET_IMC_MMIO_SIZE(reg); 656 } 657 658 return mdev; 659 } 660 661 static int i10nm_get_ddr_munits(void) 662 { 663 struct pci_dev *mdev; 664 void __iomem *mbase; 665 unsigned long size; 666 struct skx_dev *d; 667 int i, j = 0; 668 u32 reg, off; 669 u64 base; 670 671 list_for_each_entry(d, i10nm_edac_list, list) { 672 d->util_all = pci_get_dev_wrapper(d->seg, d->bus[res_cfg->util_all_bdf.bus], 673 res_cfg->util_all_bdf.dev, 674 res_cfg->util_all_bdf.fun); 675 if (!d->util_all) 676 return -ENODEV; 677 678 d->uracu = pci_get_dev_wrapper(d->seg, d->bus[res_cfg->uracu_bdf.bus], 679 res_cfg->uracu_bdf.dev, 680 res_cfg->uracu_bdf.fun); 681 if (!d->uracu) 682 return -ENODEV; 683 684 if (I10NM_GET_SCK_BAR(d, reg)) { 685 i10nm_printk(KERN_ERR, "Failed to socket bar\n"); 686 return -ENODEV; 687 } 688 689 base = I10NM_GET_SCK_MMIO_BASE(reg); 690 edac_dbg(2, "socket%d mmio base 0x%llx (reg 0x%x)\n", 691 j++, base, reg); 692 693 for (i = 0; i < res_cfg->ddr_imc_num; i++) { 694 mdev = get_ddr_munit(d, i, &off, &size); 695 696 if (i == 0 && !mdev) { 697 i10nm_printk(KERN_ERR, "No IMC found\n"); 698 return -ENODEV; 699 } 700 if (!mdev) 701 continue; 702 703 d->imc[i].mdev = mdev; 704 705 edac_dbg(2, "mc%d mmio base 0x%llx size 0x%lx (reg 0x%x)\n", 706 i, base + off, size, reg); 707 708 mbase = ioremap(base + off, size); 709 if (!mbase) { 710 i10nm_printk(KERN_ERR, "Failed to ioremap 0x%llx\n", 711 base + off); 712 return -ENODEV; 713 } 714 715 d->imc[i].mbase = mbase; 716 } 717 } 718 719 return 0; 720 } 721 722 static bool i10nm_check_hbm_imc(struct skx_dev *d) 723 { 724 u32 reg; 725 726 if (I10NM_GET_CAPID3_CFG(d, reg)) { 727 i10nm_printk(KERN_ERR, "Failed to get capid3_cfg\n"); 728 return false; 729 } 730 731 return I10NM_IS_HBM_PRESENT(reg) != 0; 732 } 733 734 static int i10nm_get_hbm_munits(void) 735 { 736 struct pci_dev *mdev; 737 void __iomem *mbase; 738 u32 reg, off, mcmtr; 739 struct skx_dev *d; 740 int i, lmc; 741 u64 base; 742 743 list_for_each_entry(d, i10nm_edac_list, list) { 744 if (!d->pcu_cr3) 745 return -ENODEV; 746 747 if (!i10nm_check_hbm_imc(d)) { 748 i10nm_printk(KERN_DEBUG, "No hbm memory\n"); 749 return -ENODEV; 750 } 751 752 if (I10NM_GET_SCK_BAR(d, reg)) { 753 i10nm_printk(KERN_ERR, "Failed to get socket bar\n"); 754 return -ENODEV; 755 } 756 base = I10NM_GET_SCK_MMIO_BASE(reg); 757 758 if (I10NM_GET_HBM_IMC_BAR(d, reg)) { 759 i10nm_printk(KERN_ERR, "Failed to get hbm mc bar\n"); 760 return -ENODEV; 761 } 762 base += I10NM_GET_HBM_IMC_MMIO_OFFSET(reg); 763 764 lmc = res_cfg->ddr_imc_num; 765 766 for (i = 0; i < res_cfg->hbm_imc_num; i++) { 767 mdev = pci_get_dev_wrapper(d->seg, d->bus[res_cfg->hbm_mdev_bdf.bus], 768 res_cfg->hbm_mdev_bdf.dev + i / 4, 769 res_cfg->hbm_mdev_bdf.fun + i % 4); 770 771 if (i == 0 && !mdev) { 772 i10nm_printk(KERN_ERR, "No hbm mc found\n"); 773 return -ENODEV; 774 } 775 if (!mdev) 776 continue; 777 778 d->imc[lmc].mdev = mdev; 779 off = i * I10NM_HBM_IMC_MMIO_SIZE; 780 781 edac_dbg(2, "hbm mc%d mmio base 0x%llx size 0x%x\n", 782 lmc, base + off, I10NM_HBM_IMC_MMIO_SIZE); 783 784 mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE); 785 if (!mbase) { 786 pci_dev_put(d->imc[lmc].mdev); 787 d->imc[lmc].mdev = NULL; 788 789 i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n", 790 base + off); 791 return -ENOMEM; 792 } 793 794 d->imc[lmc].mbase = mbase; 795 d->imc[lmc].hbm_mc = true; 796 797 mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0); 798 if (!I10NM_IS_HBM_IMC(mcmtr)) { 799 iounmap(d->imc[lmc].mbase); 800 d->imc[lmc].mbase = NULL; 801 d->imc[lmc].hbm_mc = false; 802 pci_dev_put(d->imc[lmc].mdev); 803 d->imc[lmc].mdev = NULL; 804 805 i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n"); 806 return -ENODEV; 807 } 808 809 lmc++; 810 } 811 } 812 813 return 0; 814 } 815 816 static struct res_config i10nm_cfg0 = { 817 .type = I10NM, 818 .decs_did = 0x3452, 819 .busno_cfg_offset = 0xcc, 820 .ddr_imc_num = 4, 821 .ddr_chan_num = 2, 822 .ddr_dimm_num = 2, 823 .ddr_chan_mmio_sz = 0x4000, 824 .sad_all_bdf = {1, 29, 0}, 825 .pcu_cr3_bdf = {1, 30, 3}, 826 .util_all_bdf = {1, 29, 1}, 827 .uracu_bdf = {0, 0, 1}, 828 .ddr_mdev_bdf = {0, 12, 0}, 829 .hbm_mdev_bdf = {0, 12, 1}, 830 .sad_all_offset = 0x108, 831 .offsets_scrub = offsets_scrub_icx, 832 .offsets_demand = offsets_demand_icx, 833 }; 834 835 static struct res_config i10nm_cfg1 = { 836 .type = I10NM, 837 .decs_did = 0x3452, 838 .busno_cfg_offset = 0xd0, 839 .ddr_imc_num = 4, 840 .ddr_chan_num = 2, 841 .ddr_dimm_num = 2, 842 .ddr_chan_mmio_sz = 0x4000, 843 .sad_all_bdf = {1, 29, 0}, 844 .pcu_cr3_bdf = {1, 30, 3}, 845 .util_all_bdf = {1, 29, 1}, 846 .uracu_bdf = {0, 0, 1}, 847 .ddr_mdev_bdf = {0, 12, 0}, 848 .hbm_mdev_bdf = {0, 12, 1}, 849 .sad_all_offset = 0x108, 850 .offsets_scrub = offsets_scrub_icx, 851 .offsets_demand = offsets_demand_icx, 852 }; 853 854 static struct res_config spr_cfg = { 855 .type = SPR, 856 .decs_did = 0x3252, 857 .busno_cfg_offset = 0xd0, 858 .ddr_imc_num = 4, 859 .ddr_chan_num = 2, 860 .ddr_dimm_num = 2, 861 .hbm_imc_num = 16, 862 .hbm_chan_num = 2, 863 .hbm_dimm_num = 1, 864 .ddr_chan_mmio_sz = 0x8000, 865 .hbm_chan_mmio_sz = 0x4000, 866 .support_ddr5 = true, 867 .sad_all_bdf = {1, 10, 0}, 868 .pcu_cr3_bdf = {1, 30, 3}, 869 .util_all_bdf = {1, 29, 1}, 870 .uracu_bdf = {0, 0, 1}, 871 .ddr_mdev_bdf = {0, 12, 0}, 872 .hbm_mdev_bdf = {0, 12, 1}, 873 .sad_all_offset = 0x300, 874 .offsets_scrub = offsets_scrub_spr, 875 .offsets_scrub_hbm0 = offsets_scrub_spr_hbm0, 876 .offsets_scrub_hbm1 = offsets_scrub_spr_hbm1, 877 .offsets_demand = offsets_demand_spr, 878 .offsets_demand2 = offsets_demand2_spr, 879 .offsets_demand_hbm0 = offsets_demand_spr_hbm0, 880 .offsets_demand_hbm1 = offsets_demand_spr_hbm1, 881 }; 882 883 static struct res_config gnr_cfg = { 884 .type = GNR, 885 .decs_did = 0x3252, 886 .busno_cfg_offset = 0xd0, 887 .ddr_imc_num = 12, 888 .ddr_chan_num = 1, 889 .ddr_dimm_num = 2, 890 .ddr_chan_mmio_sz = 0x4000, 891 .support_ddr5 = true, 892 .sad_all_bdf = {0, 13, 0}, 893 .pcu_cr3_bdf = {0, 5, 0}, 894 .util_all_bdf = {0, 13, 1}, 895 .uracu_bdf = {0, 0, 1}, 896 .ddr_mdev_bdf = {0, 5, 1}, 897 .sad_all_offset = 0x300, 898 }; 899 900 static const struct x86_cpu_id i10nm_cpuids[] = { 901 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0), 902 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1), 903 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0), 904 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1), 905 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_D, X86_STEPPINGS(0x0, 0xf), &i10nm_cfg1), 906 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SAPPHIRERAPIDS_X, X86_STEPPINGS(0x0, 0xf), &spr_cfg), 907 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(EMERALDRAPIDS_X, X86_STEPPINGS(0x0, 0xf), &spr_cfg), 908 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(GRANITERAPIDS_X, X86_STEPPINGS(0x0, 0xf), &gnr_cfg), 909 {} 910 }; 911 MODULE_DEVICE_TABLE(x86cpu, i10nm_cpuids); 912 913 static bool i10nm_check_ecc(struct skx_imc *imc, int chan) 914 { 915 u32 mcmtr; 916 917 mcmtr = I10NM_GET_MCMTR(imc, chan); 918 edac_dbg(1, "ch%d mcmtr reg %x\n", chan, mcmtr); 919 920 return !!GET_BITFIELD(mcmtr, 2, 2); 921 } 922 923 static int i10nm_get_dimm_config(struct mem_ctl_info *mci, 924 struct res_config *cfg) 925 { 926 struct skx_pvt *pvt = mci->pvt_info; 927 struct skx_imc *imc = pvt->imc; 928 u32 mtr, amap, mcddrtcfg = 0; 929 struct dimm_info *dimm; 930 int i, j, ndimms; 931 932 for (i = 0; i < imc->num_channels; i++) { 933 if (!imc->mbase) 934 continue; 935 936 ndimms = 0; 937 amap = I10NM_GET_AMAP(imc, i); 938 939 if (res_cfg->type != GNR) 940 mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i); 941 942 for (j = 0; j < imc->num_dimms; j++) { 943 dimm = edac_get_dimm(mci, i, j, 0); 944 mtr = I10NM_GET_DIMMMTR(imc, i, j); 945 edac_dbg(1, "dimmmtr 0x%x mcddrtcfg 0x%x (mc%d ch%d dimm%d)\n", 946 mtr, mcddrtcfg, imc->mc, i, j); 947 948 if (IS_DIMM_PRESENT(mtr)) 949 ndimms += skx_get_dimm_info(mtr, 0, amap, dimm, 950 imc, i, j, cfg); 951 else if (IS_NVDIMM_PRESENT(mcddrtcfg, j)) 952 ndimms += skx_get_nvdimm_info(dimm, imc, i, j, 953 EDAC_MOD_STR); 954 } 955 if (ndimms && !i10nm_check_ecc(imc, i)) { 956 i10nm_printk(KERN_ERR, "ECC is disabled on imc %d channel %d\n", 957 imc->mc, i); 958 return -ENODEV; 959 } 960 } 961 962 return 0; 963 } 964 965 static struct notifier_block i10nm_mce_dec = { 966 .notifier_call = skx_mce_check_error, 967 .priority = MCE_PRIO_EDAC, 968 }; 969 970 #ifdef CONFIG_EDAC_DEBUG 971 /* 972 * Debug feature. 973 * Exercise the address decode logic by writing an address to 974 * /sys/kernel/debug/edac/i10nm_test/addr. 975 */ 976 static struct dentry *i10nm_test; 977 978 static int debugfs_u64_set(void *data, u64 val) 979 { 980 struct mce m; 981 982 pr_warn_once("Fake error to 0x%llx injected via debugfs\n", val); 983 984 memset(&m, 0, sizeof(m)); 985 /* ADDRV + MemRd + Unknown channel */ 986 m.status = MCI_STATUS_ADDRV + 0x90; 987 /* One corrected error */ 988 m.status |= BIT_ULL(MCI_STATUS_CEC_SHIFT); 989 m.addr = val; 990 skx_mce_check_error(NULL, 0, &m); 991 992 return 0; 993 } 994 DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n"); 995 996 static void setup_i10nm_debug(void) 997 { 998 i10nm_test = edac_debugfs_create_dir("i10nm_test"); 999 if (!i10nm_test) 1000 return; 1001 1002 if (!edac_debugfs_create_file("addr", 0200, i10nm_test, 1003 NULL, &fops_u64_wo)) { 1004 debugfs_remove(i10nm_test); 1005 i10nm_test = NULL; 1006 } 1007 } 1008 1009 static void teardown_i10nm_debug(void) 1010 { 1011 debugfs_remove_recursive(i10nm_test); 1012 } 1013 #else 1014 static inline void setup_i10nm_debug(void) {} 1015 static inline void teardown_i10nm_debug(void) {} 1016 #endif /*CONFIG_EDAC_DEBUG*/ 1017 1018 static int __init i10nm_init(void) 1019 { 1020 u8 mc = 0, src_id = 0, node_id = 0; 1021 const struct x86_cpu_id *id; 1022 struct res_config *cfg; 1023 const char *owner; 1024 struct skx_dev *d; 1025 int rc, i, off[3] = {0xd0, 0xc8, 0xcc}; 1026 u64 tolm, tohm; 1027 int imc_num; 1028 1029 edac_dbg(2, "\n"); 1030 1031 if (ghes_get_devices()) 1032 return -EBUSY; 1033 1034 owner = edac_get_owner(); 1035 if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) 1036 return -EBUSY; 1037 1038 if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) 1039 return -ENODEV; 1040 1041 id = x86_match_cpu(i10nm_cpuids); 1042 if (!id) 1043 return -ENODEV; 1044 1045 cfg = (struct res_config *)id->driver_data; 1046 res_cfg = cfg; 1047 1048 rc = skx_get_hi_lo(0x09a2, off, &tolm, &tohm); 1049 if (rc) 1050 return rc; 1051 1052 rc = skx_get_all_bus_mappings(cfg, &i10nm_edac_list); 1053 if (rc < 0) 1054 goto fail; 1055 if (rc == 0) { 1056 i10nm_printk(KERN_ERR, "No memory controllers found\n"); 1057 return -ENODEV; 1058 } 1059 1060 rc = i10nm_get_imc_num(cfg); 1061 if (rc < 0) 1062 goto fail; 1063 1064 mem_cfg_2lm = i10nm_check_2lm(cfg); 1065 skx_set_mem_cfg(mem_cfg_2lm); 1066 1067 rc = i10nm_get_ddr_munits(); 1068 1069 if (i10nm_get_hbm_munits() && rc) 1070 goto fail; 1071 1072 imc_num = res_cfg->ddr_imc_num + res_cfg->hbm_imc_num; 1073 1074 list_for_each_entry(d, i10nm_edac_list, list) { 1075 rc = skx_get_src_id(d, 0xf8, &src_id); 1076 if (rc < 0) 1077 goto fail; 1078 1079 rc = skx_get_node_id(d, &node_id); 1080 if (rc < 0) 1081 goto fail; 1082 1083 edac_dbg(2, "src_id = %d node_id = %d\n", src_id, node_id); 1084 for (i = 0; i < imc_num; i++) { 1085 if (!d->imc[i].mdev) 1086 continue; 1087 1088 d->imc[i].mc = mc++; 1089 d->imc[i].lmc = i; 1090 d->imc[i].src_id = src_id; 1091 d->imc[i].node_id = node_id; 1092 if (d->imc[i].hbm_mc) { 1093 d->imc[i].chan_mmio_sz = cfg->hbm_chan_mmio_sz; 1094 d->imc[i].num_channels = cfg->hbm_chan_num; 1095 d->imc[i].num_dimms = cfg->hbm_dimm_num; 1096 } else { 1097 d->imc[i].chan_mmio_sz = cfg->ddr_chan_mmio_sz; 1098 d->imc[i].num_channels = cfg->ddr_chan_num; 1099 d->imc[i].num_dimms = cfg->ddr_dimm_num; 1100 } 1101 1102 rc = skx_register_mci(&d->imc[i], d->imc[i].mdev, 1103 "Intel_10nm Socket", EDAC_MOD_STR, 1104 i10nm_get_dimm_config, cfg); 1105 if (rc < 0) 1106 goto fail; 1107 } 1108 } 1109 1110 rc = skx_adxl_get(); 1111 if (rc) 1112 goto fail; 1113 1114 opstate_init(); 1115 mce_register_decode_chain(&i10nm_mce_dec); 1116 setup_i10nm_debug(); 1117 1118 if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) { 1119 skx_set_decode(i10nm_mc_decode, show_retry_rd_err_log); 1120 if (retry_rd_err_log == 2) 1121 enable_retry_rd_err_log(true); 1122 } else { 1123 skx_set_decode(i10nm_mc_decode, NULL); 1124 } 1125 1126 i10nm_printk(KERN_INFO, "%s\n", I10NM_REVISION); 1127 1128 return 0; 1129 fail: 1130 skx_remove(); 1131 return rc; 1132 } 1133 1134 static void __exit i10nm_exit(void) 1135 { 1136 edac_dbg(2, "\n"); 1137 1138 if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) { 1139 skx_set_decode(NULL, NULL); 1140 if (retry_rd_err_log == 2) 1141 enable_retry_rd_err_log(false); 1142 } 1143 1144 teardown_i10nm_debug(); 1145 mce_unregister_decode_chain(&i10nm_mce_dec); 1146 skx_adxl_put(); 1147 skx_remove(); 1148 } 1149 1150 module_init(i10nm_init); 1151 module_exit(i10nm_exit); 1152 1153 static int set_decoding_via_mca(const char *buf, const struct kernel_param *kp) 1154 { 1155 unsigned long val; 1156 int ret; 1157 1158 ret = kstrtoul(buf, 0, &val); 1159 1160 if (ret || val > 1) 1161 return -EINVAL; 1162 1163 if (val && mem_cfg_2lm) { 1164 i10nm_printk(KERN_NOTICE, "Decoding errors via MCA banks for 2LM isn't supported yet\n"); 1165 return -EIO; 1166 } 1167 1168 ret = param_set_int(buf, kp); 1169 1170 return ret; 1171 } 1172 1173 static const struct kernel_param_ops decoding_via_mca_param_ops = { 1174 .set = set_decoding_via_mca, 1175 .get = param_get_int, 1176 }; 1177 1178 module_param_cb(decoding_via_mca, &decoding_via_mca_param_ops, &decoding_via_mca, 0644); 1179 MODULE_PARM_DESC(decoding_via_mca, "decoding_via_mca: 0=off(default), 1=enable"); 1180 1181 module_param(retry_rd_err_log, int, 0444); 1182 MODULE_PARM_DESC(retry_rd_err_log, "retry_rd_err_log: 0=off(default), 1=bios(Linux doesn't reset any control bits, but just reports values.), 2=linux(Linux tries to take control and resets mode bits, clear valid/UC bits after reading.)"); 1183 1184 MODULE_LICENSE("GPL v2"); 1185 MODULE_DESCRIPTION("MC Driver for Intel 10nm server processors"); 1186