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
get_umc_base(u8 channel)404 static inline u32 get_umc_base(u8 channel)
405 {
406 /* chY: 0xY50000 */
407 return 0x50000 + (channel << 20);
408 }
409
get_dram_base(struct amd64_pvt * pvt,u8 i)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
get_dram_limit(struct amd64_pvt * pvt,u8 i)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
extract_syndrome(u64 status)430 static inline u16 extract_syndrome(u64 status)
431 {
432 return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00);
433 }
434
dct_sel_interleave_addr(struct amd64_pvt * pvt)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 */
disable_caches(void * dummy)486 static inline void disable_caches(void *dummy)
487 {
488 write_cr0(read_cr0() | X86_CR0_CD);
489 wbinvd();
490 }
491
enable_caches(void * dummy)492 static inline void enable_caches(void *dummy)
493 {
494 write_cr0(read_cr0() & ~X86_CR0_CD);
495 }
496
dram_intlv_en(struct amd64_pvt * pvt,unsigned int i)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
dhar_valid(struct amd64_pvt * pvt)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
dct_sel_baseaddr(struct amd64_pvt * pvt)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