summaryrefslogtreecommitdiffstats
path: root/drivers/edac/edac_mce_amd.c
blob: 8fc91a019620d57fab83e04ed34fac8d826f0e32 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
#include <linux/module.h>
#include "edac_mce_amd.h"

static bool report_gart_errors;
static void (*nb_bus_decoder)(int node_id, struct err_regs *regs);

void amd_report_gart_errors(bool v)
{
	report_gart_errors = v;
}
EXPORT_SYMBOL_GPL(amd_report_gart_errors);

void amd_register_ecc_decoder(void (*f)(int, struct err_regs *))
{
	nb_bus_decoder = f;
}
EXPORT_SYMBOL_GPL(amd_register_ecc_decoder);

void amd_unregister_ecc_decoder(void (*f)(int, struct err_regs *))
{
	if (nb_bus_decoder) {
		WARN_ON(nb_bus_decoder != f);

		nb_bus_decoder = NULL;
	}
}
EXPORT_SYMBOL_GPL(amd_unregister_ecc_decoder);

/*
 * string representation for the different MCA reported error types, see F3x48
 * or MSR0000_0411.
 */
const char *tt_msgs[] = {        /* transaction type */
	"instruction",
	"data",
	"generic",
	"reserved"
};
EXPORT_SYMBOL_GPL(tt_msgs);

const char *ll_msgs[] = {	/* cache level */
	"L0",
	"L1",
	"L2",
	"L3/generic"
};
EXPORT_SYMBOL_GPL(ll_msgs);

const char *rrrr_msgs[] = {
	"generic",
	"generic read",
	"generic write",
	"data read",
	"data write",
	"inst fetch",
	"prefetch",
	"evict",
	"snoop",
	"reserved RRRR= 9",
	"reserved RRRR= 10",
	"reserved RRRR= 11",
	"reserved RRRR= 12",
	"reserved RRRR= 13",
	"reserved RRRR= 14",
	"reserved RRRR= 15"
};
EXPORT_SYMBOL_GPL(rrrr_msgs);

const char *pp_msgs[] = {	/* participating processor */
	"local node originated (SRC)",
	"local node responded to request (RES)",
	"local node observed as 3rd party (OBS)",
	"generic"
};
EXPORT_SYMBOL_GPL(pp_msgs);

const char *to_msgs[] = {
	"no timeout",
	"timed out"
};
EXPORT_SYMBOL_GPL(to_msgs);

const char *ii_msgs[] = {	/* memory or i/o */
	"mem access",
	"reserved",
	"i/o access",
	"generic"
};
EXPORT_SYMBOL_GPL(ii_msgs);

/*
 * Map the 4 or 5 (family-specific) bits of Extended Error code to the
 * string table.
 */
const char *ext_msgs[] = {
	"K8 ECC error",					/* 0_0000b */
	"CRC error on link",				/* 0_0001b */
	"Sync error packets on link",			/* 0_0010b */
	"Master Abort during link operation",		/* 0_0011b */
	"Target Abort during link operation",		/* 0_0100b */
	"Invalid GART PTE entry during table walk",	/* 0_0101b */
	"Unsupported atomic RMW command received",	/* 0_0110b */
	"WDT error: NB transaction timeout",		/* 0_0111b */
	"ECC/ChipKill ECC error",			/* 0_1000b */
	"SVM DEV Error",				/* 0_1001b */
	"Link Data error",				/* 0_1010b */
	"Link/L3/Probe Filter Protocol error",		/* 0_1011b */
	"NB Internal Arrays Parity error",		/* 0_1100b */
	"DRAM Address/Control Parity error",		/* 0_1101b */
	"Link Transmission error",			/* 0_1110b */
	"GART/DEV Table Walk Data error"		/* 0_1111b */
	"Res 0x100 error",				/* 1_0000b */
	"Res 0x101 error",				/* 1_0001b */
	"Res 0x102 error",				/* 1_0010b */
	"Res 0x103 error",				/* 1_0011b */
	"Res 0x104 error",				/* 1_0100b */
	"Res 0x105 error",				/* 1_0101b */
	"Res 0x106 error",				/* 1_0110b */
	"Res 0x107 error",				/* 1_0111b */
	"Res 0x108 error",				/* 1_1000b */
	"Res 0x109 error",				/* 1_1001b */
	"Res 0x10A error",				/* 1_1010b */
	"Res 0x10B error",				/* 1_1011b */
	"ECC error in L3 Cache Data",			/* 1_1100b */
	"L3 Cache Tag error",				/* 1_1101b */
	"L3 Cache LRU Parity error",			/* 1_1110b */
	"Probe Filter error"				/* 1_1111b */
};
EXPORT_SYMBOL_GPL(ext_msgs);

static void amd_decode_dc_mce(u64 mc0_status)
{
	u32 ec  = mc0_status & 0xffff;
	u32 xec = (mc0_status >> 16) & 0xf;

	pr_emerg(" Data Cache Error");

	if (xec == 1 && TLB_ERROR(ec))
		pr_cont(": %s TLB multimatch.\n", LL_MSG(ec));
	else if (xec == 0) {
		if (mc0_status & (1ULL << 40))
			pr_cont(" during Data Scrub.\n");
		else if (TLB_ERROR(ec))
			pr_cont(": %s TLB parity error.\n", LL_MSG(ec));
		else if (MEM_ERROR(ec)) {
			u8 ll   = ec & 0x3;
			u8 tt   = (ec >> 2) & 0x3;
			u8 rrrr = (ec >> 4) & 0xf;

			/* see F10h BKDG (31116), Table 92. */
			if (ll == 0x1) {
				if (tt != 0x1)
					goto wrong_dc_mce;

				pr_cont(": Data/Tag %s error.\n", RRRR_MSG(ec));

			} else if (ll == 0x2 && rrrr == 0x3)
				pr_cont(" during L1 linefill from L2.\n");
			else
				goto wrong_dc_mce;
		} else if (BUS_ERROR(ec) && boot_cpu_data.x86 == 0xf)
			pr_cont(" during system linefill.\n");
		else
			goto wrong_dc_mce;
	} else
		goto wrong_dc_mce;

	return;

wrong_dc_mce:
	pr_warning("Corrupted DC MCE info?\n");
}

static void amd_decode_ic_mce(u64 mc1_status)
{
	u32 ec  = mc1_status & 0xffff;
	u32 xec = (mc1_status >> 16) & 0xf;

	pr_emerg(" Instruction Cache Error");

	if (xec == 1 && TLB_ERROR(ec))
		pr_cont(": %s TLB multimatch.\n", LL_MSG(ec));
	else if (xec == 0) {
		if (TLB_ERROR(ec))
			pr_cont(": %s TLB Parity error.\n", LL_MSG(ec));
		else if (BUS_ERROR(ec)) {
			if (boot_cpu_data.x86 == 0xf &&
			    (mc1_status & (1ULL << 58)))
				pr_cont(" during system linefill.\n");
			else
				pr_cont(" during attempted NB data read.\n");
		} else if (MEM_ERROR(ec)) {
			u8 ll   = ec & 0x3;
			u8 rrrr = (ec >> 4) & 0xf;

			if (ll == 0x2)
				pr_cont(" during a linefill from L2.\n");
			else if (ll == 0x1) {

				switch (rrrr) {
				case 0x5:
					pr_cont(": Parity error during "
					       "data load.\n");
					break;

				case 0x7:
					pr_cont(": Copyback Parity/Victim"
						" error.\n");
					break;

				case 0x8:
					pr_cont(": Tag Snoop error.\n");
					break;

				default:
					goto wrong_ic_mce;
					break;
				}
			}
		} else
			goto wrong_ic_mce;
	} else
		goto wrong_ic_mce;

	return;

wrong_ic_mce:
	pr_warning("Corrupted IC MCE info?\n");
}

static void amd_decode_bu_mce(u64 mc2_status)
{
	u32 ec = mc2_status & 0xffff;
	u32 xec = (mc2_status >> 16) & 0xf;

	pr_emerg(" Bus Unit Error");

	if (xec == 0x1)
		pr_cont(" in the write data buffers.\n");
	else if (xec == 0x3)
		pr_cont(" in the victim data buffers.\n");
	else if (xec == 0x2 && MEM_ERROR(ec))
		pr_cont(": %s error in the L2 cache tags.\n", RRRR_MSG(ec));
	else if (xec == 0x0) {
		if (TLB_ERROR(ec))
			pr_cont(": %s error in a Page Descriptor Cache or "
				"Guest TLB.\n", TT_MSG(ec));
		else if (BUS_ERROR(ec))
			pr_cont(": %s/ECC error in data read from NB: %s.\n",
				RRRR_MSG(ec), PP_MSG(ec));
		else if (MEM_ERROR(ec)) {
			u8 rrrr = (ec >> 4) & 0xf;

			if (rrrr >= 0x7)
				pr_cont(": %s error during data copyback.\n",
					RRRR_MSG(ec));
			else if (rrrr <= 0x1)
				pr_cont(": %s parity/ECC error during data "
					"access from L2.\n", RRRR_MSG(ec));
			else
				goto wrong_bu_mce;
		} else
			goto wrong_bu_mce;
	} else
		goto wrong_bu_mce;

	return;

wrong_bu_mce:
	pr_warning("Corrupted BU MCE info?\n");
}

static void amd_decode_ls_mce(u64 mc3_status)
{
	u32 ec  = mc3_status & 0xffff;
	u32 xec = (mc3_status >> 16) & 0xf;

	pr_emerg(" Load Store Error");

	if (xec == 0x0) {
		u8 rrrr = (ec >> 4) & 0xf;

		if (!BUS_ERROR(ec) || (rrrr != 0x3 && rrrr != 0x4))
			goto wrong_ls_mce;

		pr_cont(" during %s.\n", RRRR_MSG(ec));
	}
	return;

wrong_ls_mce:
	pr_warning("Corrupted LS MCE info?\n");
}

void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)
{
	u32 ec  = ERROR_CODE(regs->nbsl);
	u32 xec = EXT_ERROR_CODE(regs->nbsl);

	if (!handle_errors)
		return;

	/*
	 * GART TLB error reporting is disabled by default. Bail out early.
	 */
	if (TLB_ERROR(ec) && !report_gart_errors)
		return;

	pr_emerg(" Northbridge Error, node %d", node_id);

	/*
	 * F10h, revD can disable ErrCpu[3:0] so check that first and also the
	 * value encoding has changed so interpret those differently
	 */
	if ((boot_cpu_data.x86 == 0x10) &&
	    (boot_cpu_data.x86_model > 7)) {
		if (regs->nbsh & K8_NBSH_ERR_CPU_VAL)
			pr_cont(", core: %u\n", (u8)(regs->nbsh & 0xf));
	} else {
		pr_cont(", core: %d\n", fls((regs->nbsh & 0xf) - 1));
	}

	pr_emerg("%s.\n", EXT_ERR_MSG(xec));

	if (BUS_ERROR(ec) && nb_bus_decoder)
		nb_bus_decoder(node_id, regs);
}
EXPORT_SYMBOL_GPL(amd_decode_nb_mce);

static void amd_decode_fr_mce(u64 mc5_status)
{
	/* we have only one error signature so match all fields at once. */
	if ((mc5_status & 0xffff) == 0x0f0f)
		pr_emerg(" FR Error: CPU Watchdog timer expire.\n");
	else
		pr_warning("Corrupted FR MCE info?\n");
}

static inline void amd_decode_err_code(unsigned int ec)
{
	if (TLB_ERROR(ec)) {
		pr_emerg(" Transaction: %s, Cache Level %s\n",
			 TT_MSG(ec), LL_MSG(ec));
	} else if (MEM_ERROR(ec)) {
		pr_emerg(" Transaction: %s, Type: %s, Cache Level: %s",
			 RRRR_MSG(ec), TT_MSG(ec), LL_MSG(ec));
	} else if (BUS_ERROR(ec)) {
		pr_emerg(" Transaction type: %s(%s), %s, Cache Level: %s, "
			 "Participating Processor: %s\n",
			  RRRR_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec),
			  PP_MSG(ec));
	} else
		pr_warning("Huh? Unknown MCE error 0x%x\n", ec);
}

static int amd_decode_mce(struct notifier_block *nb, unsigned long val,
			   void *data)
{
	struct mce *m = (struct mce *)data;
	struct err_regs regs;
	int node, ecc;

	pr_emerg("MC%d_STATUS: ", m->bank);

	pr_cont("%sorrected error, report: %s, MiscV: %svalid, "
		 "CPU context corrupt: %s",
		 ((m->status & MCI_STATUS_UC) ? "Unc"  : "C"),
		 ((m->status & MCI_STATUS_EN) ? "yes"  : "no"),
		 ((m->status & MCI_STATUS_MISCV) ? ""  : "in"),
		 ((m->status & MCI_STATUS_PCC) ? "yes" : "no"));

	/* do the two bits[14:13] together */
	ecc = m->status & (3ULL << 45);
	if (ecc)
		pr_cont(", %sECC Error", ((ecc == 2) ? "C" : "U"));

	pr_cont("\n");

	switch (m->bank) {
	case 0:
		amd_decode_dc_mce(m->status);
		break;

	case 1:
		amd_decode_ic_mce(m->status);
		break;

	case 2:
		amd_decode_bu_mce(m->status);
		break;

	case 3:
		amd_decode_ls_mce(m->status);
		break;

	case 4:
		regs.nbsl  = (u32) m->status;
		regs.nbsh  = (u32)(m->status >> 32);
		regs.nbeal = (u32) m->addr;
		regs.nbeah = (u32)(m->addr >> 32);
		node       = amd_get_nb_id(m->extcpu);

		amd_decode_nb_mce(node, &regs, 1);
		break;

	case 5:
		amd_decode_fr_mce(m->status);
		break;

	default:
		break;
	}

	amd_decode_err_code(m->status & 0xffff);

	return NOTIFY_STOP;
}

static struct notifier_block amd_mce_dec_nb = {
	.notifier_call	= amd_decode_mce,
};

static int __init mce_amd_init(void)
{
	/*
	 * We can decode MCEs for Opteron and later CPUs:
	 */
	if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
	    (boot_cpu_data.x86 >= 0xf))
		atomic_notifier_chain_register(&x86_mce_decoder_chain, &amd_mce_dec_nb);

	return 0;
}
early_initcall(mce_amd_init);

#ifdef MODULE
static void __exit mce_amd_exit(void)
{
	atomic_notifier_chain_unregister(&x86_mce_decoder_chain, &amd_mce_dec_nb);
}

MODULE_DESCRIPTION("AMD MCE decoder");
MODULE_ALIAS("edac-mce-amd");
MODULE_LICENSE("GPL");
module_exit(mce_amd_exit);
#endif