2 * Intel 5100 Memory Controllers kernel module
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
7 * This module is based on the following document:
9 * Intel 5100X Chipset Memory Controller Hub (MCH) - Datasheet
10 * http://download.intel.com/design/chipsets/datashts/318378.pdf
12 * The intel 5100 has two independent channels. EDAC core currently
13 * can not reflect this configuration so instead the chip-select
14 * rows for each respective channel are laid out one after another,
15 * the first half belonging to channel 0, the second half belonging
18 * This driver is for DDR2 DIMMs, and it uses chip select to select among the
19 * several ranks. However, instead of showing memories as ranks, it outputs
20 * them as DIMM's. An internal table creates the association between ranks
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/pci_ids.h>
27 #include <linux/edac.h>
28 #include <linux/delay.h>
29 #include <linux/mmzone.h>
30 #include <linux/debugfs.h>
32 #include "edac_core.h"
33 #include "edac_module.h"
35 /* register addresses */
37 /* device 16, func 1 */
38 #define I5100_MC 0x40 /* Memory Control Register */
39 #define I5100_MC_SCRBEN_MASK (1 << 7)
40 #define I5100_MC_SCRBDONE_MASK (1 << 4)
41 #define I5100_MS 0x44 /* Memory Status Register */
42 #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */
43 #define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */
44 #define I5100_TOLM 0x6c /* Top of Low Memory */
45 #define I5100_MIR0 0x80 /* Memory Interleave Range 0 */
46 #define I5100_MIR1 0x84 /* Memory Interleave Range 1 */
47 #define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */
48 #define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */
49 #define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */
50 #define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16)
51 #define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15)
52 #define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14)
53 #define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12)
54 #define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11)
55 #define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10)
56 #define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6)
57 #define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5)
58 #define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4)
59 #define I5100_FERR_NF_MEM_M1ERR_MASK (1 << 1)
60 #define I5100_FERR_NF_MEM_ANY_MASK \
61 (I5100_FERR_NF_MEM_M16ERR_MASK | \
62 I5100_FERR_NF_MEM_M15ERR_MASK | \
63 I5100_FERR_NF_MEM_M14ERR_MASK | \
64 I5100_FERR_NF_MEM_M12ERR_MASK | \
65 I5100_FERR_NF_MEM_M11ERR_MASK | \
66 I5100_FERR_NF_MEM_M10ERR_MASK | \
67 I5100_FERR_NF_MEM_M6ERR_MASK | \
68 I5100_FERR_NF_MEM_M5ERR_MASK | \
69 I5100_FERR_NF_MEM_M4ERR_MASK | \
70 I5100_FERR_NF_MEM_M1ERR_MASK)
71 #define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */
72 #define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */
73 #define I5100_MEM0EINJMSK0 0x200 /* Injection Mask0 Register Channel 0 */
74 #define I5100_MEM1EINJMSK0 0x208 /* Injection Mask0 Register Channel 1 */
75 #define I5100_MEMXEINJMSK0_EINJEN (1 << 27)
76 #define I5100_MEM0EINJMSK1 0x204 /* Injection Mask1 Register Channel 0 */
77 #define I5100_MEM1EINJMSK1 0x206 /* Injection Mask1 Register Channel 1 */
79 /* Device 19, Function 0 */
80 #define I5100_DINJ0 0x9a
82 /* device 21 and 22, func 0 */
83 #define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */
84 #define I5100_DMIR 0x15c /* DIMM Interleave Range */
85 #define I5100_VALIDLOG 0x18c /* Valid Log Markers */
86 #define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */
87 #define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */
88 #define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */
89 #define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */
90 #define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */
91 #define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */
92 #define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */
94 /* bit field accessors */
96 static inline u32 i5100_mc_scrben(u32 mc)
101 static inline u32 i5100_mc_errdeten(u32 mc)
106 static inline u32 i5100_mc_scrbdone(u32 mc)
111 static inline u16 i5100_spddata_rdo(u16 a)
116 static inline u16 i5100_spddata_sbe(u16 a)
121 static inline u16 i5100_spddata_busy(u16 a)
126 static inline u16 i5100_spddata_data(u16 a)
128 return a & ((1 << 8) - 1);
131 static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba,
134 return ((dti & ((1 << 4) - 1)) << 28) |
135 ((ckovrd & 1) << 27) |
136 ((sa & ((1 << 3) - 1)) << 24) |
137 ((ba & ((1 << 8) - 1)) << 16) |
138 ((data & ((1 << 8) - 1)) << 8) |
142 static inline u16 i5100_tolm_tolm(u16 a)
144 return a >> 12 & ((1 << 4) - 1);
147 static inline u16 i5100_mir_limit(u16 a)
149 return a >> 4 & ((1 << 12) - 1);
152 static inline u16 i5100_mir_way1(u16 a)
157 static inline u16 i5100_mir_way0(u16 a)
162 static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a)
167 static inline u32 i5100_ferr_nf_mem_any(u32 a)
169 return a & I5100_FERR_NF_MEM_ANY_MASK;
172 static inline u32 i5100_nerr_nf_mem_any(u32 a)
174 return i5100_ferr_nf_mem_any(a);
177 static inline u32 i5100_dmir_limit(u32 a)
179 return a >> 16 & ((1 << 11) - 1);
182 static inline u32 i5100_dmir_rank(u32 a, u32 i)
184 return a >> (4 * i) & ((1 << 2) - 1);
187 static inline u16 i5100_mtr_present(u16 a)
192 static inline u16 i5100_mtr_ethrottle(u16 a)
197 static inline u16 i5100_mtr_width(u16 a)
202 static inline u16 i5100_mtr_numbank(u16 a)
207 static inline u16 i5100_mtr_numrow(u16 a)
209 return a >> 2 & ((1 << 2) - 1);
212 static inline u16 i5100_mtr_numcol(u16 a)
214 return a & ((1 << 2) - 1);
218 static inline u32 i5100_validlog_redmemvalid(u32 a)
223 static inline u32 i5100_validlog_recmemvalid(u32 a)
228 static inline u32 i5100_validlog_nrecmemvalid(u32 a)
233 static inline u32 i5100_nrecmema_merr(u32 a)
235 return a >> 15 & ((1 << 5) - 1);
238 static inline u32 i5100_nrecmema_bank(u32 a)
240 return a >> 12 & ((1 << 3) - 1);
243 static inline u32 i5100_nrecmema_rank(u32 a)
245 return a >> 8 & ((1 << 3) - 1);
248 static inline u32 i5100_nrecmema_dm_buf_id(u32 a)
250 return a & ((1 << 8) - 1);
253 static inline u32 i5100_nrecmemb_cas(u32 a)
255 return a >> 16 & ((1 << 13) - 1);
258 static inline u32 i5100_nrecmemb_ras(u32 a)
260 return a & ((1 << 16) - 1);
263 static inline u32 i5100_redmemb_ecc_locator(u32 a)
265 return a & ((1 << 18) - 1);
268 static inline u32 i5100_recmema_merr(u32 a)
270 return i5100_nrecmema_merr(a);
273 static inline u32 i5100_recmema_bank(u32 a)
275 return i5100_nrecmema_bank(a);
278 static inline u32 i5100_recmema_rank(u32 a)
280 return i5100_nrecmema_rank(a);
283 static inline u32 i5100_recmemb_cas(u32 a)
285 return i5100_nrecmemb_cas(a);
288 static inline u32 i5100_recmemb_ras(u32 a)
290 return i5100_nrecmemb_ras(a);
293 /* some generic limits */
294 #define I5100_MAX_RANKS_PER_CHAN 6
295 #define I5100_CHANNELS 2
296 #define I5100_MAX_RANKS_PER_DIMM 4
297 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */
298 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4
299 #define I5100_MAX_RANK_INTERLEAVE 4
300 #define I5100_MAX_DMIRS 5
301 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ)
304 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */
305 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN];
308 * mainboard chip select map -- maps i5100 chip selects to
309 * DIMM slot chip selects. In the case of only 4 ranks per
310 * channel, the mapping is fairly obvious but not unique.
311 * we map -1 -> NC and assume both channels use the same
315 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM];
317 /* memory interleave range */
321 } mir[I5100_CHANNELS];
323 /* adjusted memory interleave range register */
324 unsigned amir[I5100_CHANNELS];
326 /* dimm interleave range */
328 unsigned rank[I5100_MAX_RANK_INTERLEAVE];
330 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS];
332 /* memory technology registers... */
334 unsigned present; /* 0 or 1 */
335 unsigned ethrottle; /* 0 or 1 */
336 unsigned width; /* 4 or 8 bits */
337 unsigned numbank; /* 2 or 3 lines */
338 unsigned numrow; /* 13 .. 16 lines */
339 unsigned numcol; /* 11 .. 12 lines */
340 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN];
342 u64 tolm; /* top of low memory in bytes */
343 unsigned ranksperchan; /* number of ranks per channel */
345 struct pci_dev *mc; /* device 16 func 1 */
346 struct pci_dev *einj; /* device 19 func 0 */
347 struct pci_dev *ch0mm; /* device 21 func 0 */
348 struct pci_dev *ch1mm; /* device 22 func 0 */
350 struct delayed_work i5100_scrubbing;
353 /* Error injection */
356 u8 inject_deviceptr1;
357 u8 inject_deviceptr2;
361 struct dentry *debugfs;
364 static struct dentry *i5100_debugfs;
366 /* map a rank/chan to a slot number on the mainboard */
367 static int i5100_rank_to_slot(const struct mem_ctl_info *mci,
370 const struct i5100_priv *priv = mci->pvt_info;
373 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
375 const int numrank = priv->dimm_numrank[chan][i];
377 for (j = 0; j < numrank; j++)
378 if (priv->dimm_csmap[i][j] == rank)
385 static const char *i5100_err_msg(unsigned err)
387 static const char *merrs[] = {
389 "uncorrectable data ECC on replay", /* 1 */
392 "aliased uncorrectable demand data ECC", /* 4 */
393 "aliased uncorrectable spare-copy data ECC", /* 5 */
394 "aliased uncorrectable patrol data ECC", /* 6 */
398 "non-aliased uncorrectable demand data ECC", /* 10 */
399 "non-aliased uncorrectable spare-copy data ECC", /* 11 */
400 "non-aliased uncorrectable patrol data ECC", /* 12 */
402 "correctable demand data ECC", /* 14 */
403 "correctable spare-copy data ECC", /* 15 */
404 "correctable patrol data ECC", /* 16 */
406 "SPD protocol error", /* 18 */
408 "spare copy initiated", /* 20 */
409 "spare copy completed", /* 21 */
413 for (i = 0; i < ARRAY_SIZE(merrs); i++)
420 /* convert csrow index into a rank (per channel -- 0..5) */
421 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow)
423 const struct i5100_priv *priv = mci->pvt_info;
425 return csrow % priv->ranksperchan;
428 /* convert csrow index into a channel (0..1) */
429 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow)
431 const struct i5100_priv *priv = mci->pvt_info;
433 return csrow / priv->ranksperchan;
436 static void i5100_handle_ce(struct mem_ctl_info *mci,
440 unsigned long syndrome,
447 /* Form out message */
448 snprintf(detail, sizeof(detail),
449 "bank %u, cas %u, ras %u\n",
452 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
458 static void i5100_handle_ue(struct mem_ctl_info *mci,
462 unsigned long syndrome,
469 /* Form out message */
470 snprintf(detail, sizeof(detail),
471 "bank %u, cas %u, ras %u\n",
474 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
480 static void i5100_read_log(struct mem_ctl_info *mci, int chan,
483 struct i5100_priv *priv = mci->pvt_info;
484 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm;
487 unsigned syndrome = 0;
488 unsigned ecc_loc = 0;
495 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw);
497 if (i5100_validlog_redmemvalid(dw)) {
498 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2);
500 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2);
501 ecc_loc = i5100_redmemb_ecc_locator(dw2);
504 if (i5100_validlog_recmemvalid(dw)) {
507 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2);
508 merr = i5100_recmema_merr(dw2);
509 bank = i5100_recmema_bank(dw2);
510 rank = i5100_recmema_rank(dw2);
512 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2);
513 cas = i5100_recmemb_cas(dw2);
514 ras = i5100_recmemb_ras(dw2);
516 /* FIXME: not really sure if this is what merr is...
519 msg = i5100_err_msg(ferr);
521 msg = i5100_err_msg(nerr);
523 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg);
526 if (i5100_validlog_nrecmemvalid(dw)) {
529 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2);
530 merr = i5100_nrecmema_merr(dw2);
531 bank = i5100_nrecmema_bank(dw2);
532 rank = i5100_nrecmema_rank(dw2);
534 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2);
535 cas = i5100_nrecmemb_cas(dw2);
536 ras = i5100_nrecmemb_ras(dw2);
538 /* FIXME: not really sure if this is what merr is...
541 msg = i5100_err_msg(ferr);
543 msg = i5100_err_msg(nerr);
545 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg);
548 pci_write_config_dword(pdev, I5100_VALIDLOG, dw);
551 static void i5100_check_error(struct mem_ctl_info *mci)
553 struct i5100_priv *priv = mci->pvt_info;
556 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw);
557 if (i5100_ferr_nf_mem_any(dw)) {
559 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2);
561 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw),
562 i5100_ferr_nf_mem_any(dw),
563 i5100_nerr_nf_mem_any(dw2));
565 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, dw2);
567 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw);
570 /* The i5100 chipset will scrub the entire memory once, then
571 * set a done bit. Continuous scrubbing is achieved by enqueing
572 * delayed work to a workqueue, checking every few minutes if
573 * the scrubbing has completed and if so reinitiating it.
576 static void i5100_refresh_scrubbing(struct work_struct *work)
578 struct delayed_work *i5100_scrubbing = container_of(work,
581 struct i5100_priv *priv = container_of(i5100_scrubbing,
586 pci_read_config_dword(priv->mc, I5100_MC, &dw);
588 if (priv->scrub_enable) {
590 pci_read_config_dword(priv->mc, I5100_MC, &dw);
592 if (i5100_mc_scrbdone(dw)) {
593 dw |= I5100_MC_SCRBEN_MASK;
594 pci_write_config_dword(priv->mc, I5100_MC, dw);
595 pci_read_config_dword(priv->mc, I5100_MC, &dw);
598 schedule_delayed_work(&(priv->i5100_scrubbing),
599 I5100_SCRUB_REFRESH_RATE);
603 * The bandwidth is based on experimentation, feel free to refine it.
605 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth)
607 struct i5100_priv *priv = mci->pvt_info;
610 pci_read_config_dword(priv->mc, I5100_MC, &dw);
612 priv->scrub_enable = 1;
613 dw |= I5100_MC_SCRBEN_MASK;
614 schedule_delayed_work(&(priv->i5100_scrubbing),
615 I5100_SCRUB_REFRESH_RATE);
617 priv->scrub_enable = 0;
618 dw &= ~I5100_MC_SCRBEN_MASK;
619 cancel_delayed_work(&(priv->i5100_scrubbing));
621 pci_write_config_dword(priv->mc, I5100_MC, dw);
623 pci_read_config_dword(priv->mc, I5100_MC, &dw);
625 bandwidth = 5900000 * i5100_mc_scrben(dw);
630 static int i5100_get_scrub_rate(struct mem_ctl_info *mci)
632 struct i5100_priv *priv = mci->pvt_info;
635 pci_read_config_dword(priv->mc, I5100_MC, &dw);
637 return 5900000 * i5100_mc_scrben(dw);
640 static struct pci_dev *pci_get_device_func(unsigned vendor,
644 struct pci_dev *ret = NULL;
647 ret = pci_get_device(vendor, device, ret);
652 if (PCI_FUNC(ret->devfn) == func)
659 static unsigned long i5100_npages(struct mem_ctl_info *mci, int csrow)
661 struct i5100_priv *priv = mci->pvt_info;
662 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow);
663 const unsigned chan = i5100_csrow_to_chan(mci, csrow);
667 if (!priv->mtr[chan][chan_rank].present)
671 I5100_DIMM_ADDR_LINES +
672 priv->mtr[chan][chan_rank].numcol +
673 priv->mtr[chan][chan_rank].numrow +
674 priv->mtr[chan][chan_rank].numbank;
676 return (unsigned long)
677 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE);
680 static void i5100_init_mtr(struct mem_ctl_info *mci)
682 struct i5100_priv *priv = mci->pvt_info;
683 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
686 for (i = 0; i < I5100_CHANNELS; i++) {
688 struct pci_dev *pdev = mms[i];
690 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) {
691 const unsigned addr =
692 (j < 4) ? I5100_MTR_0 + j * 2 :
693 I5100_MTR_4 + (j - 4) * 2;
696 pci_read_config_word(pdev, addr, &w);
698 priv->mtr[i][j].present = i5100_mtr_present(w);
699 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w);
700 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w);
701 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w);
702 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w);
703 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w);
709 * FIXME: make this into a real i2c adapter (so that dimm-decode
712 static int i5100_read_spd_byte(const struct mem_ctl_info *mci,
713 u8 ch, u8 slot, u8 addr, u8 *byte)
715 struct i5100_priv *priv = mci->pvt_info;
719 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
720 if (i5100_spddata_busy(w))
723 pci_write_config_dword(priv->mc, I5100_SPDCMD,
724 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr,
727 /* wait up to 100ms */
728 et = jiffies + HZ / 10;
731 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
732 if (!i5100_spddata_busy(w))
737 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w))
740 *byte = i5100_spddata_data(w);
746 * fill dimm chip select map
749 * o not the only way to may chip selects to dimm slots
750 * o investigate if there is some way to obtain this map from the bios
752 static void i5100_init_dimm_csmap(struct mem_ctl_info *mci)
754 struct i5100_priv *priv = mci->pvt_info;
757 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
760 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++)
761 priv->dimm_csmap[i][j] = -1; /* default NC */
764 /* only 2 chip selects per slot... */
765 if (priv->ranksperchan == 4) {
766 priv->dimm_csmap[0][0] = 0;
767 priv->dimm_csmap[0][1] = 3;
768 priv->dimm_csmap[1][0] = 1;
769 priv->dimm_csmap[1][1] = 2;
770 priv->dimm_csmap[2][0] = 2;
771 priv->dimm_csmap[3][0] = 3;
773 priv->dimm_csmap[0][0] = 0;
774 priv->dimm_csmap[0][1] = 1;
775 priv->dimm_csmap[1][0] = 2;
776 priv->dimm_csmap[1][1] = 3;
777 priv->dimm_csmap[2][0] = 4;
778 priv->dimm_csmap[2][1] = 5;
782 static void i5100_init_dimm_layout(struct pci_dev *pdev,
783 struct mem_ctl_info *mci)
785 struct i5100_priv *priv = mci->pvt_info;
788 for (i = 0; i < I5100_CHANNELS; i++) {
791 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) {
794 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0)
795 priv->dimm_numrank[i][j] = 0;
797 priv->dimm_numrank[i][j] = (rank & 3) + 1;
801 i5100_init_dimm_csmap(mci);
804 static void i5100_init_interleaving(struct pci_dev *pdev,
805 struct mem_ctl_info *mci)
809 struct i5100_priv *priv = mci->pvt_info;
810 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
813 pci_read_config_word(pdev, I5100_TOLM, &w);
814 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024;
816 pci_read_config_word(pdev, I5100_MIR0, &w);
817 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28;
818 priv->mir[0].way[1] = i5100_mir_way1(w);
819 priv->mir[0].way[0] = i5100_mir_way0(w);
821 pci_read_config_word(pdev, I5100_MIR1, &w);
822 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28;
823 priv->mir[1].way[1] = i5100_mir_way1(w);
824 priv->mir[1].way[0] = i5100_mir_way0(w);
826 pci_read_config_word(pdev, I5100_AMIR_0, &w);
828 pci_read_config_word(pdev, I5100_AMIR_1, &w);
831 for (i = 0; i < I5100_CHANNELS; i++) {
834 for (j = 0; j < 5; j++) {
837 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw);
839 priv->dmir[i][j].limit =
840 (u64) i5100_dmir_limit(dw) << 28;
841 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++)
842 priv->dmir[i][j].rank[k] =
843 i5100_dmir_rank(dw, k);
850 static void i5100_init_csrows(struct mem_ctl_info *mci)
853 struct i5100_priv *priv = mci->pvt_info;
855 for (i = 0; i < mci->tot_dimms; i++) {
856 struct dimm_info *dimm;
857 const unsigned long npages = i5100_npages(mci, i);
858 const unsigned chan = i5100_csrow_to_chan(mci, i);
859 const unsigned rank = i5100_csrow_to_rank(mci, i);
864 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
867 dimm->nr_pages = npages;
869 dimm->dtype = (priv->mtr[chan][rank].width == 4) ?
871 dimm->mtype = MEM_RDDR2;
872 dimm->edac_mode = EDAC_SECDED;
873 snprintf(dimm->label, sizeof(dimm->label), "DIMM%u",
874 i5100_rank_to_slot(mci, chan, rank));
876 edac_dbg(2, "dimm channel %d, rank %d, size %ld\n",
877 chan, rank, (long)PAGES_TO_MiB(npages));
881 /****************************************************************************
882 * Error injection routines
883 ****************************************************************************/
885 static void i5100_do_inject(struct mem_ctl_info *mci)
887 struct i5100_priv *priv = mci->pvt_info;
895 * 01 Lower half of cache line
896 * 10 Upper half of cache line
897 * 11 Both upper and lower parts of cache line
899 * 25:19 - XORMASK1 for deviceptr1
900 * 9:5 - SEC2RAM for deviceptr2
901 * 4:0 - FIR2RAM for deviceptr1
903 mask0 = ((priv->inject_hlinesel & 0x3) << 28) |
904 I5100_MEMXEINJMSK0_EINJEN |
905 ((priv->inject_eccmask1 & 0xffff) << 10) |
906 ((priv->inject_deviceptr2 & 0x1f) << 5) |
907 (priv->inject_deviceptr1 & 0x1f);
910 * 15:0 - XORMASK2 for deviceptr2
912 mask1 = priv->inject_eccmask2;
914 if (priv->inject_channel == 0) {
915 pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0);
916 pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1);
918 pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0);
919 pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1);
922 /* Error Injection Response Function
923 * Intel 5100 Memory Controller Hub Chipset (318378) datasheet
924 * hints about this register but carry no data about them. All
925 * data regarding device 19 is based on experimentation and the
926 * Intel 7300 Chipset Memory Controller Hub (318082) datasheet
927 * which appears to be accurate for the i5100 in this area.
929 * The injection code don't work without setting this register.
930 * The register needs to be flipped off then on else the hardware
931 * will only preform the first injection.
933 * Stop condition bits 7:4
934 * 1010 - Stop after one injection
935 * 1011 - Never stop injecting faults
937 * Start condition bits 3:0
939 * 1011 - Start immediately
941 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa);
942 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab);
945 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
946 static ssize_t inject_enable_write(struct file *file, const char __user *data,
947 size_t count, loff_t *ppos)
949 struct device *dev = file->private_data;
950 struct mem_ctl_info *mci = to_mci(dev);
952 i5100_do_inject(mci);
957 static const struct file_operations i5100_inject_enable_fops = {
959 .write = inject_enable_write,
960 .llseek = generic_file_llseek,
963 static int i5100_setup_debugfs(struct mem_ctl_info *mci)
965 struct i5100_priv *priv = mci->pvt_info;
970 priv->debugfs = edac_debugfs_create_dir_at(mci->bus->name, i5100_debugfs);
975 edac_debugfs_create_x8("inject_channel", S_IRUGO | S_IWUSR, priv->debugfs,
976 &priv->inject_channel);
977 edac_debugfs_create_x8("inject_hlinesel", S_IRUGO | S_IWUSR, priv->debugfs,
978 &priv->inject_hlinesel);
979 edac_debugfs_create_x8("inject_deviceptr1", S_IRUGO | S_IWUSR, priv->debugfs,
980 &priv->inject_deviceptr1);
981 edac_debugfs_create_x8("inject_deviceptr2", S_IRUGO | S_IWUSR, priv->debugfs,
982 &priv->inject_deviceptr2);
983 edac_debugfs_create_x16("inject_eccmask1", S_IRUGO | S_IWUSR, priv->debugfs,
984 &priv->inject_eccmask1);
985 edac_debugfs_create_x16("inject_eccmask2", S_IRUGO | S_IWUSR, priv->debugfs,
986 &priv->inject_eccmask2);
987 edac_debugfs_create_file("inject_enable", S_IWUSR, priv->debugfs,
988 &mci->dev, &i5100_inject_enable_fops);
994 static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
997 struct mem_ctl_info *mci;
998 struct edac_mc_layer layers[2];
999 struct i5100_priv *priv;
1000 struct pci_dev *ch0mm, *ch1mm, *einj;
1005 if (PCI_FUNC(pdev->devfn) != 1)
1008 rc = pci_enable_device(pdev);
1015 pci_read_config_dword(pdev, I5100_MC, &dw);
1016 if (!i5100_mc_errdeten(dw)) {
1017 printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
1022 /* figure out how many ranks, from strapped state of 48GB_Mode input */
1023 pci_read_config_dword(pdev, I5100_MS, &dw);
1024 ranksperch = !!(dw & (1 << 8)) * 2 + 4;
1026 /* enable error reporting... */
1027 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw);
1028 dw &= ~I5100_FERR_NF_MEM_ANY_MASK;
1029 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw);
1031 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */
1032 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1033 PCI_DEVICE_ID_INTEL_5100_21, 0);
1039 rc = pci_enable_device(ch0mm);
1045 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */
1046 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1047 PCI_DEVICE_ID_INTEL_5100_22, 0);
1050 goto bail_disable_ch0;
1053 rc = pci_enable_device(ch1mm);
1059 layers[0].type = EDAC_MC_LAYER_CHANNEL;
1061 layers[0].is_virt_csrow = false;
1062 layers[1].type = EDAC_MC_LAYER_SLOT;
1063 layers[1].size = ranksperch;
1064 layers[1].is_virt_csrow = true;
1065 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers,
1069 goto bail_disable_ch1;
1073 /* device 19, func 0, Error injection */
1074 einj = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1075 PCI_DEVICE_ID_INTEL_5100_19, 0);
1081 rc = pci_enable_device(einj);
1084 goto bail_disable_einj;
1088 mci->pdev = &pdev->dev;
1090 priv = mci->pvt_info;
1091 priv->ranksperchan = ranksperch;
1093 priv->ch0mm = ch0mm;
1094 priv->ch1mm = ch1mm;
1097 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing);
1099 /* If scrubbing was already enabled by the bios, start maintaining it */
1100 pci_read_config_dword(pdev, I5100_MC, &dw);
1101 if (i5100_mc_scrben(dw)) {
1102 priv->scrub_enable = 1;
1103 schedule_delayed_work(&(priv->i5100_scrubbing),
1104 I5100_SCRUB_REFRESH_RATE);
1107 i5100_init_dimm_layout(pdev, mci);
1108 i5100_init_interleaving(pdev, mci);
1110 mci->mtype_cap = MEM_FLAG_FB_DDR2;
1111 mci->edac_ctl_cap = EDAC_FLAG_SECDED;
1112 mci->edac_cap = EDAC_FLAG_SECDED;
1113 mci->mod_name = "i5100_edac.c";
1114 mci->mod_ver = "not versioned";
1115 mci->ctl_name = "i5100";
1116 mci->dev_name = pci_name(pdev);
1117 mci->ctl_page_to_phys = NULL;
1119 mci->edac_check = i5100_check_error;
1120 mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
1121 mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
1123 priv->inject_channel = 0;
1124 priv->inject_hlinesel = 0;
1125 priv->inject_deviceptr1 = 0;
1126 priv->inject_deviceptr2 = 0;
1127 priv->inject_eccmask1 = 0;
1128 priv->inject_eccmask2 = 0;
1130 i5100_init_csrows(mci);
1132 /* this strange construction seems to be in every driver, dunno why */
1133 switch (edac_op_state) {
1134 case EDAC_OPSTATE_POLL:
1135 case EDAC_OPSTATE_NMI:
1138 edac_op_state = EDAC_OPSTATE_POLL;
1142 if (edac_mc_add_mc(mci)) {
1147 i5100_setup_debugfs(mci);
1152 priv->scrub_enable = 0;
1153 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1157 pci_disable_device(einj);
1163 pci_disable_device(ch1mm);
1169 pci_disable_device(ch0mm);
1175 pci_disable_device(pdev);
1181 static void i5100_remove_one(struct pci_dev *pdev)
1183 struct mem_ctl_info *mci;
1184 struct i5100_priv *priv;
1186 mci = edac_mc_del_mc(&pdev->dev);
1191 priv = mci->pvt_info;
1193 edac_debugfs_remove_recursive(priv->debugfs);
1195 priv->scrub_enable = 0;
1196 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1198 pci_disable_device(pdev);
1199 pci_disable_device(priv->ch0mm);
1200 pci_disable_device(priv->ch1mm);
1201 pci_disable_device(priv->einj);
1202 pci_dev_put(priv->ch0mm);
1203 pci_dev_put(priv->ch1mm);
1204 pci_dev_put(priv->einj);
1209 static const struct pci_device_id i5100_pci_tbl[] = {
1210 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */
1211 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) },
1214 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl);
1216 static struct pci_driver i5100_driver = {
1217 .name = KBUILD_BASENAME,
1218 .probe = i5100_init_one,
1219 .remove = i5100_remove_one,
1220 .id_table = i5100_pci_tbl,
1223 static int __init i5100_init(void)
1227 i5100_debugfs = edac_debugfs_create_dir_at("i5100_edac", NULL);
1229 pci_rc = pci_register_driver(&i5100_driver);
1230 return (pci_rc < 0) ? pci_rc : 0;
1233 static void __exit i5100_exit(void)
1235 edac_debugfs_remove(i5100_debugfs);
1237 pci_unregister_driver(&i5100_driver);
1240 module_init(i5100_init);
1241 module_exit(i5100_exit);
1243 MODULE_LICENSE("GPL");
1245 ("Arthur Jones <ajones@riverbed.com>");
1246 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers");