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 "v0.0.5"
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, 0xd8 + (i) * 4, &(reg))
27 #define I10NM_GET_SAD(d, offset, i, reg)\
28 pci_read_config_dword((d)->sad_all, (offset) + (i) * 8, &(reg))
29 #define I10NM_GET_HBM_IMC_BAR(d, reg) \
30 pci_read_config_dword((d)->uracu, 0xd4, &(reg))
31 #define I10NM_GET_CAPID3_CFG(d, reg) \
32 pci_read_config_dword((d)->pcu_cr3, 0x90, &(reg))
33 #define I10NM_GET_DIMMMTR(m, i, j) \
34 readl((m)->mbase + ((m)->hbm_mc ? 0x80c : 0x2080c) + \
35 (i) * (m)->chan_mmio_sz + (j) * 4)
36 #define I10NM_GET_MCDDRTCFG(m, i) \
37 readl((m)->mbase + ((m)->hbm_mc ? 0x970 : 0x20970) + \
38 (i) * (m)->chan_mmio_sz)
39 #define I10NM_GET_MCMTR(m, i) \
40 readl((m)->mbase + ((m)->hbm_mc ? 0xef8 : 0x20ef8) + \
41 (i) * (m)->chan_mmio_sz)
42 #define I10NM_GET_AMAP(m, i) \
43 readl((m)->mbase + ((m)->hbm_mc ? 0x814 : 0x20814) + \
44 (i) * (m)->chan_mmio_sz)
45 #define I10NM_GET_REG32(m, i, offset) \
46 readl((m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
47 #define I10NM_GET_REG64(m, i, offset) \
48 readq((m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
49 #define I10NM_SET_REG32(m, i, offset, v) \
50 writel(v, (m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
51
52 #define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23)
53 #define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12)
54 #define I10NM_GET_IMC_MMIO_SIZE(reg) ((GET_BITFIELD(reg, 13, 23) - \
55 GET_BITFIELD(reg, 0, 10) + 1) << 12)
56 #define I10NM_GET_HBM_IMC_MMIO_OFFSET(reg) \
57 ((GET_BITFIELD(reg, 0, 10) << 12) + 0x140000)
58
59 #define I10NM_HBM_IMC_MMIO_SIZE 0x9000
60 #define I10NM_IS_HBM_PRESENT(reg) GET_BITFIELD(reg, 27, 30)
61 #define I10NM_IS_HBM_IMC(reg) GET_BITFIELD(reg, 29, 29)
62
63 #define I10NM_MAX_SAD 16
64 #define I10NM_SAD_ENABLE(reg) GET_BITFIELD(reg, 0, 0)
65 #define I10NM_SAD_NM_CACHEABLE(reg) GET_BITFIELD(reg, 5, 5)
66
67 #define RETRY_RD_ERR_LOG_UC BIT(1)
68 #define RETRY_RD_ERR_LOG_NOOVER BIT(14)
69 #define RETRY_RD_ERR_LOG_EN BIT(15)
70 #define RETRY_RD_ERR_LOG_NOOVER_UC (BIT(14) | BIT(1))
71 #define RETRY_RD_ERR_LOG_OVER_UC_V (BIT(2) | BIT(1) | BIT(0))
72
73 static struct list_head *i10nm_edac_list;
74
75 static struct res_config *res_cfg;
76 static int retry_rd_err_log;
77
78 static u32 offsets_scrub_icx[] = {0x22c60, 0x22c54, 0x22c5c, 0x22c58, 0x22c28, 0x20ed8};
79 static u32 offsets_scrub_spr[] = {0x22c60, 0x22c54, 0x22f08, 0x22c58, 0x22c28, 0x20ed8};
80 static u32 offsets_demand_icx[] = {0x22e54, 0x22e60, 0x22e64, 0x22e58, 0x22e5c, 0x20ee0};
81 static u32 offsets_demand_spr[] = {0x22e54, 0x22e60, 0x22f10, 0x22e58, 0x22e5c, 0x20ee0};
82
__enable_retry_rd_err_log(struct skx_imc * imc,int chan,bool enable)83 static void __enable_retry_rd_err_log(struct skx_imc *imc, int chan, bool enable)
84 {
85 u32 s, d;
86
87 if (!imc->mbase)
88 return;
89
90 s = I10NM_GET_REG32(imc, chan, res_cfg->offsets_scrub[0]);
91 d = I10NM_GET_REG32(imc, chan, res_cfg->offsets_demand[0]);
92
93 if (enable) {
94 /* Save default configurations */
95 imc->chan[chan].retry_rd_err_log_s = s;
96 imc->chan[chan].retry_rd_err_log_d = d;
97
98 s &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
99 s |= RETRY_RD_ERR_LOG_EN;
100 d &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
101 d |= RETRY_RD_ERR_LOG_EN;
102 } else {
103 /* Restore default configurations */
104 if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_UC)
105 s |= RETRY_RD_ERR_LOG_UC;
106 if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_NOOVER)
107 s |= RETRY_RD_ERR_LOG_NOOVER;
108 if (!(imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_EN))
109 s &= ~RETRY_RD_ERR_LOG_EN;
110 if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_UC)
111 d |= RETRY_RD_ERR_LOG_UC;
112 if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_NOOVER)
113 d |= RETRY_RD_ERR_LOG_NOOVER;
114 if (!(imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_EN))
115 d &= ~RETRY_RD_ERR_LOG_EN;
116 }
117
118 I10NM_SET_REG32(imc, chan, res_cfg->offsets_scrub[0], s);
119 I10NM_SET_REG32(imc, chan, res_cfg->offsets_demand[0], d);
120 }
121
enable_retry_rd_err_log(bool enable)122 static void enable_retry_rd_err_log(bool enable)
123 {
124 struct skx_dev *d;
125 int i, j;
126
127 edac_dbg(2, "\n");
128
129 list_for_each_entry(d, i10nm_edac_list, list)
130 for (i = 0; i < I10NM_NUM_IMC; i++)
131 for (j = 0; j < I10NM_NUM_CHANNELS; j++)
132 __enable_retry_rd_err_log(&d->imc[i], j, enable);
133 }
134
show_retry_rd_err_log(struct decoded_addr * res,char * msg,int len,bool scrub_err)135 static void show_retry_rd_err_log(struct decoded_addr *res, char *msg,
136 int len, bool scrub_err)
137 {
138 struct skx_imc *imc = &res->dev->imc[res->imc];
139 u32 log0, log1, log2, log3, log4;
140 u32 corr0, corr1, corr2, corr3;
141 u64 log2a, log5;
142 u32 *offsets;
143 int n;
144
145 if (!imc->mbase)
146 return;
147
148 offsets = scrub_err ? res_cfg->offsets_scrub : res_cfg->offsets_demand;
149
150 log0 = I10NM_GET_REG32(imc, res->channel, offsets[0]);
151 log1 = I10NM_GET_REG32(imc, res->channel, offsets[1]);
152 log3 = I10NM_GET_REG32(imc, res->channel, offsets[3]);
153 log4 = I10NM_GET_REG32(imc, res->channel, offsets[4]);
154 log5 = I10NM_GET_REG64(imc, res->channel, offsets[5]);
155
156 if (res_cfg->type == SPR) {
157 log2a = I10NM_GET_REG64(imc, res->channel, offsets[2]);
158 n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.16llx %.8x %.8x %.16llx]",
159 log0, log1, log2a, log3, log4, log5);
160 } else {
161 log2 = I10NM_GET_REG32(imc, res->channel, offsets[2]);
162 n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.8x %.8x %.8x %.16llx]",
163 log0, log1, log2, log3, log4, log5);
164 }
165
166 corr0 = I10NM_GET_REG32(imc, res->channel, 0x22c18);
167 corr1 = I10NM_GET_REG32(imc, res->channel, 0x22c1c);
168 corr2 = I10NM_GET_REG32(imc, res->channel, 0x22c20);
169 corr3 = I10NM_GET_REG32(imc, res->channel, 0x22c24);
170
171 if (len - n > 0)
172 snprintf(msg + n, len - n,
173 " correrrcnt[%.4x %.4x %.4x %.4x %.4x %.4x %.4x %.4x]",
174 corr0 & 0xffff, corr0 >> 16,
175 corr1 & 0xffff, corr1 >> 16,
176 corr2 & 0xffff, corr2 >> 16,
177 corr3 & 0xffff, corr3 >> 16);
178
179 /* Clear status bits */
180 if (retry_rd_err_log == 2 && (log0 & RETRY_RD_ERR_LOG_OVER_UC_V)) {
181 log0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V;
182 I10NM_SET_REG32(imc, res->channel, offsets[0], log0);
183 }
184 }
185
pci_get_dev_wrapper(int dom,unsigned int bus,unsigned int dev,unsigned int fun)186 static struct pci_dev *pci_get_dev_wrapper(int dom, unsigned int bus,
187 unsigned int dev, unsigned int fun)
188 {
189 struct pci_dev *pdev;
190
191 pdev = pci_get_domain_bus_and_slot(dom, bus, PCI_DEVFN(dev, fun));
192 if (!pdev) {
193 edac_dbg(2, "No device %02x:%02x.%x\n",
194 bus, dev, fun);
195 return NULL;
196 }
197
198 if (unlikely(pci_enable_device(pdev) < 0)) {
199 edac_dbg(2, "Failed to enable device %02x:%02x.%x\n",
200 bus, dev, fun);
201 pci_dev_put(pdev);
202 return NULL;
203 }
204
205 return pdev;
206 }
207
i10nm_check_2lm(struct res_config * cfg)208 static bool i10nm_check_2lm(struct res_config *cfg)
209 {
210 struct skx_dev *d;
211 u32 reg;
212 int i;
213
214 list_for_each_entry(d, i10nm_edac_list, list) {
215 d->sad_all = pci_get_dev_wrapper(d->seg, d->bus[1],
216 PCI_SLOT(cfg->sad_all_devfn),
217 PCI_FUNC(cfg->sad_all_devfn));
218 if (!d->sad_all)
219 continue;
220
221 for (i = 0; i < I10NM_MAX_SAD; i++) {
222 I10NM_GET_SAD(d, cfg->sad_all_offset, i, reg);
223 if (I10NM_SAD_ENABLE(reg) && I10NM_SAD_NM_CACHEABLE(reg)) {
224 edac_dbg(2, "2-level memory configuration.\n");
225 return true;
226 }
227 }
228 }
229
230 return false;
231 }
232
i10nm_get_ddr_munits(void)233 static int i10nm_get_ddr_munits(void)
234 {
235 struct pci_dev *mdev;
236 void __iomem *mbase;
237 unsigned long size;
238 struct skx_dev *d;
239 int i, j = 0;
240 u32 reg, off;
241 u64 base;
242
243 list_for_each_entry(d, i10nm_edac_list, list) {
244 d->util_all = pci_get_dev_wrapper(d->seg, d->bus[1], 29, 1);
245 if (!d->util_all)
246 return -ENODEV;
247
248 d->uracu = pci_get_dev_wrapper(d->seg, d->bus[0], 0, 1);
249 if (!d->uracu)
250 return -ENODEV;
251
252 if (I10NM_GET_SCK_BAR(d, reg)) {
253 i10nm_printk(KERN_ERR, "Failed to socket bar\n");
254 return -ENODEV;
255 }
256
257 base = I10NM_GET_SCK_MMIO_BASE(reg);
258 edac_dbg(2, "socket%d mmio base 0x%llx (reg 0x%x)\n",
259 j++, base, reg);
260
261 for (i = 0; i < I10NM_NUM_DDR_IMC; i++) {
262 mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
263 12 + i, 0);
264 if (i == 0 && !mdev) {
265 i10nm_printk(KERN_ERR, "No IMC found\n");
266 return -ENODEV;
267 }
268 if (!mdev)
269 continue;
270
271 d->imc[i].mdev = mdev;
272
273 if (I10NM_GET_IMC_BAR(d, i, reg)) {
274 i10nm_printk(KERN_ERR, "Failed to get mc bar\n");
275 return -ENODEV;
276 }
277
278 off = I10NM_GET_IMC_MMIO_OFFSET(reg);
279 size = I10NM_GET_IMC_MMIO_SIZE(reg);
280 edac_dbg(2, "mc%d mmio base 0x%llx size 0x%lx (reg 0x%x)\n",
281 i, base + off, size, reg);
282
283 mbase = ioremap(base + off, size);
284 if (!mbase) {
285 i10nm_printk(KERN_ERR, "Failed to ioremap 0x%llx\n",
286 base + off);
287 return -ENODEV;
288 }
289
290 d->imc[i].mbase = mbase;
291 }
292 }
293
294 return 0;
295 }
296
i10nm_check_hbm_imc(struct skx_dev * d)297 static bool i10nm_check_hbm_imc(struct skx_dev *d)
298 {
299 u32 reg;
300
301 if (I10NM_GET_CAPID3_CFG(d, reg)) {
302 i10nm_printk(KERN_ERR, "Failed to get capid3_cfg\n");
303 return false;
304 }
305
306 return I10NM_IS_HBM_PRESENT(reg) != 0;
307 }
308
i10nm_get_hbm_munits(void)309 static int i10nm_get_hbm_munits(void)
310 {
311 struct pci_dev *mdev;
312 void __iomem *mbase;
313 u32 reg, off, mcmtr;
314 struct skx_dev *d;
315 int i, lmc;
316 u64 base;
317
318 list_for_each_entry(d, i10nm_edac_list, list) {
319 d->pcu_cr3 = pci_get_dev_wrapper(d->seg, d->bus[1], 30, 3);
320 if (!d->pcu_cr3)
321 return -ENODEV;
322
323 if (!i10nm_check_hbm_imc(d)) {
324 i10nm_printk(KERN_DEBUG, "No hbm memory\n");
325 return -ENODEV;
326 }
327
328 if (I10NM_GET_SCK_BAR(d, reg)) {
329 i10nm_printk(KERN_ERR, "Failed to get socket bar\n");
330 return -ENODEV;
331 }
332 base = I10NM_GET_SCK_MMIO_BASE(reg);
333
334 if (I10NM_GET_HBM_IMC_BAR(d, reg)) {
335 i10nm_printk(KERN_ERR, "Failed to get hbm mc bar\n");
336 return -ENODEV;
337 }
338 base += I10NM_GET_HBM_IMC_MMIO_OFFSET(reg);
339
340 lmc = I10NM_NUM_DDR_IMC;
341
342 for (i = 0; i < I10NM_NUM_HBM_IMC; i++) {
343 mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
344 12 + i / 4, 1 + i % 4);
345 if (i == 0 && !mdev) {
346 i10nm_printk(KERN_ERR, "No hbm mc found\n");
347 return -ENODEV;
348 }
349 if (!mdev)
350 continue;
351
352 d->imc[lmc].mdev = mdev;
353 off = i * I10NM_HBM_IMC_MMIO_SIZE;
354
355 edac_dbg(2, "hbm mc%d mmio base 0x%llx size 0x%x\n",
356 lmc, base + off, I10NM_HBM_IMC_MMIO_SIZE);
357
358 mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE);
359 if (!mbase) {
360 pci_dev_put(d->imc[lmc].mdev);
361 d->imc[lmc].mdev = NULL;
362
363 i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n",
364 base + off);
365 return -ENOMEM;
366 }
367
368 d->imc[lmc].mbase = mbase;
369 d->imc[lmc].hbm_mc = true;
370
371 mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0);
372 if (!I10NM_IS_HBM_IMC(mcmtr)) {
373 iounmap(d->imc[lmc].mbase);
374 d->imc[lmc].mbase = NULL;
375 d->imc[lmc].hbm_mc = false;
376 pci_dev_put(d->imc[lmc].mdev);
377 d->imc[lmc].mdev = NULL;
378
379 i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n");
380 return -ENODEV;
381 }
382
383 lmc++;
384 }
385 }
386
387 return 0;
388 }
389
390 static struct res_config i10nm_cfg0 = {
391 .type = I10NM,
392 .decs_did = 0x3452,
393 .busno_cfg_offset = 0xcc,
394 .ddr_chan_mmio_sz = 0x4000,
395 .sad_all_devfn = PCI_DEVFN(29, 0),
396 .sad_all_offset = 0x108,
397 .offsets_scrub = offsets_scrub_icx,
398 .offsets_demand = offsets_demand_icx,
399 };
400
401 static struct res_config i10nm_cfg1 = {
402 .type = I10NM,
403 .decs_did = 0x3452,
404 .busno_cfg_offset = 0xd0,
405 .ddr_chan_mmio_sz = 0x4000,
406 .sad_all_devfn = PCI_DEVFN(29, 0),
407 .sad_all_offset = 0x108,
408 .offsets_scrub = offsets_scrub_icx,
409 .offsets_demand = offsets_demand_icx,
410 };
411
412 static struct res_config spr_cfg = {
413 .type = SPR,
414 .decs_did = 0x3252,
415 .busno_cfg_offset = 0xd0,
416 .ddr_chan_mmio_sz = 0x8000,
417 .hbm_chan_mmio_sz = 0x4000,
418 .support_ddr5 = true,
419 .sad_all_devfn = PCI_DEVFN(10, 0),
420 .sad_all_offset = 0x300,
421 .offsets_scrub = offsets_scrub_spr,
422 .offsets_demand = offsets_demand_spr,
423 };
424
425 static const struct x86_cpu_id i10nm_cpuids[] = {
426 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
427 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
428 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
429 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
430 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_D, X86_STEPPINGS(0x0, 0xf), &i10nm_cfg1),
431 X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SAPPHIRERAPIDS_X, X86_STEPPINGS(0x0, 0xf), &spr_cfg),
432 {}
433 };
434 MODULE_DEVICE_TABLE(x86cpu, i10nm_cpuids);
435
i10nm_check_ecc(struct skx_imc * imc,int chan)436 static bool i10nm_check_ecc(struct skx_imc *imc, int chan)
437 {
438 u32 mcmtr;
439
440 mcmtr = I10NM_GET_MCMTR(imc, chan);
441 edac_dbg(1, "ch%d mcmtr reg %x\n", chan, mcmtr);
442
443 return !!GET_BITFIELD(mcmtr, 2, 2);
444 }
445
i10nm_get_dimm_config(struct mem_ctl_info * mci,struct res_config * cfg)446 static int i10nm_get_dimm_config(struct mem_ctl_info *mci,
447 struct res_config *cfg)
448 {
449 struct skx_pvt *pvt = mci->pvt_info;
450 struct skx_imc *imc = pvt->imc;
451 u32 mtr, amap, mcddrtcfg;
452 struct dimm_info *dimm;
453 int i, j, ndimms;
454
455 for (i = 0; i < imc->num_channels; i++) {
456 if (!imc->mbase)
457 continue;
458
459 ndimms = 0;
460 amap = I10NM_GET_AMAP(imc, i);
461 mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i);
462 for (j = 0; j < imc->num_dimms; j++) {
463 dimm = edac_get_dimm(mci, i, j, 0);
464 mtr = I10NM_GET_DIMMMTR(imc, i, j);
465 edac_dbg(1, "dimmmtr 0x%x mcddrtcfg 0x%x (mc%d ch%d dimm%d)\n",
466 mtr, mcddrtcfg, imc->mc, i, j);
467
468 if (IS_DIMM_PRESENT(mtr))
469 ndimms += skx_get_dimm_info(mtr, 0, amap, dimm,
470 imc, i, j, cfg);
471 else if (IS_NVDIMM_PRESENT(mcddrtcfg, j))
472 ndimms += skx_get_nvdimm_info(dimm, imc, i, j,
473 EDAC_MOD_STR);
474 }
475 if (ndimms && !i10nm_check_ecc(imc, i)) {
476 i10nm_printk(KERN_ERR, "ECC is disabled on imc %d channel %d\n",
477 imc->mc, i);
478 return -ENODEV;
479 }
480 }
481
482 return 0;
483 }
484
485 static struct notifier_block i10nm_mce_dec = {
486 .notifier_call = skx_mce_check_error,
487 .priority = MCE_PRIO_EDAC,
488 };
489
490 #ifdef CONFIG_EDAC_DEBUG
491 /*
492 * Debug feature.
493 * Exercise the address decode logic by writing an address to
494 * /sys/kernel/debug/edac/i10nm_test/addr.
495 */
496 static struct dentry *i10nm_test;
497
debugfs_u64_set(void * data,u64 val)498 static int debugfs_u64_set(void *data, u64 val)
499 {
500 struct mce m;
501
502 pr_warn_once("Fake error to 0x%llx injected via debugfs\n", val);
503
504 memset(&m, 0, sizeof(m));
505 /* ADDRV + MemRd + Unknown channel */
506 m.status = MCI_STATUS_ADDRV + 0x90;
507 /* One corrected error */
508 m.status |= BIT_ULL(MCI_STATUS_CEC_SHIFT);
509 m.addr = val;
510 skx_mce_check_error(NULL, 0, &m);
511
512 return 0;
513 }
514 DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
515
setup_i10nm_debug(void)516 static void setup_i10nm_debug(void)
517 {
518 i10nm_test = edac_debugfs_create_dir("i10nm_test");
519 if (!i10nm_test)
520 return;
521
522 if (!edac_debugfs_create_file("addr", 0200, i10nm_test,
523 NULL, &fops_u64_wo)) {
524 debugfs_remove(i10nm_test);
525 i10nm_test = NULL;
526 }
527 }
528
teardown_i10nm_debug(void)529 static void teardown_i10nm_debug(void)
530 {
531 debugfs_remove_recursive(i10nm_test);
532 }
533 #else
setup_i10nm_debug(void)534 static inline void setup_i10nm_debug(void) {}
teardown_i10nm_debug(void)535 static inline void teardown_i10nm_debug(void) {}
536 #endif /*CONFIG_EDAC_DEBUG*/
537
i10nm_init(void)538 static int __init i10nm_init(void)
539 {
540 u8 mc = 0, src_id = 0, node_id = 0;
541 const struct x86_cpu_id *id;
542 struct res_config *cfg;
543 const char *owner;
544 struct skx_dev *d;
545 int rc, i, off[3] = {0xd0, 0xc8, 0xcc};
546 u64 tolm, tohm;
547
548 edac_dbg(2, "\n");
549
550 owner = edac_get_owner();
551 if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
552 return -EBUSY;
553
554 if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
555 return -ENODEV;
556
557 id = x86_match_cpu(i10nm_cpuids);
558 if (!id)
559 return -ENODEV;
560
561 cfg = (struct res_config *)id->driver_data;
562 res_cfg = cfg;
563
564 rc = skx_get_hi_lo(0x09a2, off, &tolm, &tohm);
565 if (rc)
566 return rc;
567
568 rc = skx_get_all_bus_mappings(cfg, &i10nm_edac_list);
569 if (rc < 0)
570 goto fail;
571 if (rc == 0) {
572 i10nm_printk(KERN_ERR, "No memory controllers found\n");
573 return -ENODEV;
574 }
575
576 skx_set_mem_cfg(i10nm_check_2lm(cfg));
577
578 rc = i10nm_get_ddr_munits();
579
580 if (i10nm_get_hbm_munits() && rc)
581 goto fail;
582
583 list_for_each_entry(d, i10nm_edac_list, list) {
584 rc = skx_get_src_id(d, 0xf8, &src_id);
585 if (rc < 0)
586 goto fail;
587
588 rc = skx_get_node_id(d, &node_id);
589 if (rc < 0)
590 goto fail;
591
592 edac_dbg(2, "src_id = %d node_id = %d\n", src_id, node_id);
593 for (i = 0; i < I10NM_NUM_IMC; i++) {
594 if (!d->imc[i].mdev)
595 continue;
596
597 d->imc[i].mc = mc++;
598 d->imc[i].lmc = i;
599 d->imc[i].src_id = src_id;
600 d->imc[i].node_id = node_id;
601 if (d->imc[i].hbm_mc) {
602 d->imc[i].chan_mmio_sz = cfg->hbm_chan_mmio_sz;
603 d->imc[i].num_channels = I10NM_NUM_HBM_CHANNELS;
604 d->imc[i].num_dimms = I10NM_NUM_HBM_DIMMS;
605 } else {
606 d->imc[i].chan_mmio_sz = cfg->ddr_chan_mmio_sz;
607 d->imc[i].num_channels = I10NM_NUM_DDR_CHANNELS;
608 d->imc[i].num_dimms = I10NM_NUM_DDR_DIMMS;
609 }
610
611 rc = skx_register_mci(&d->imc[i], d->imc[i].mdev,
612 "Intel_10nm Socket", EDAC_MOD_STR,
613 i10nm_get_dimm_config, cfg);
614 if (rc < 0)
615 goto fail;
616 }
617 }
618
619 rc = skx_adxl_get();
620 if (rc)
621 goto fail;
622
623 opstate_init();
624 mce_register_decode_chain(&i10nm_mce_dec);
625 setup_i10nm_debug();
626
627 if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
628 skx_set_decode(NULL, show_retry_rd_err_log);
629 if (retry_rd_err_log == 2)
630 enable_retry_rd_err_log(true);
631 }
632
633 i10nm_printk(KERN_INFO, "%s\n", I10NM_REVISION);
634
635 return 0;
636 fail:
637 skx_remove();
638 return rc;
639 }
640
i10nm_exit(void)641 static void __exit i10nm_exit(void)
642 {
643 edac_dbg(2, "\n");
644
645 if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
646 skx_set_decode(NULL, NULL);
647 if (retry_rd_err_log == 2)
648 enable_retry_rd_err_log(false);
649 }
650
651 teardown_i10nm_debug();
652 mce_unregister_decode_chain(&i10nm_mce_dec);
653 skx_adxl_put();
654 skx_remove();
655 }
656
657 module_init(i10nm_init);
658 module_exit(i10nm_exit);
659
660 module_param(retry_rd_err_log, int, 0444);
661 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.)");
662
663 MODULE_LICENSE("GPL v2");
664 MODULE_DESCRIPTION("MC Driver for Intel 10nm server processors");
665