2 * Intel 7300 class Memory Controllers kernel module (Clarksboro)
4 * This file may be distributed under the terms of the
5 * GNU General Public License version 2 only.
7 * Copyright (c) 2010 by:
8 * Mauro Carvalho Chehab <mchehab@redhat.com>
10 * Red Hat Inc. http://www.redhat.com
12 * Intel 7300 Chipset Memory Controller Hub (MCH) - Datasheet
13 * http://www.intel.com/Assets/PDF/datasheet/318082.pdf
15 * TODO: The chipset allow checking for PCI Express errors also. Currently,
16 * the driver covers only memory error errors
18 * This driver uses "csrows" EDAC attribute to represent DIMM slot#
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/pci.h>
24 #include <linux/pci_ids.h>
25 #include <linux/slab.h>
26 #include <linux/edac.h>
27 #include <linux/mmzone.h>
29 #include "edac_core.h"
32 * Alter this version for the I7300 module when modifications are made
34 #define I7300_REVISION " Ver: 1.0.0 " __DATE__
36 #define EDAC_MOD_STR "i7300_edac"
38 #define i7300_printk(level, fmt, arg...) \
39 edac_printk(level, "i7300", fmt, ##arg)
41 #define i7300_mc_printk(mci, level, fmt, arg...) \
42 edac_mc_chipset_printk(mci, level, "i7300", fmt, ##arg)
45 * Memory topology is organized as:
46 * Branch 0 - 2 channels: channels 0 and 1 (FDB0 PCI dev 21.0)
47 * Branch 1 - 2 channels: channels 2 and 3 (FDB1 PCI dev 22.0)
48 * Each channel can have to 8 DIMM sets (called as SLOTS)
49 * Slots should generally be filled in pairs
50 * Except on Single Channel mode of operation
51 * just slot 0/channel0 filled on this mode
52 * On normal operation mode, the two channels on a branch should be
53 * filled together for the same SLOT#
54 * When in mirrored mode, Branch 1 replicate memory at Branch 0, so, the four
55 * channels on both branches should be filled
58 /* Limits for i7300 */
60 #define MAX_BRANCHES 2
61 #define MAX_CH_PER_BRANCH 2
62 #define MAX_CHANNELS (MAX_CH_PER_BRANCH * MAX_BRANCHES)
65 #define to_channel(ch, branch) ((((branch)) << 1) | (ch))
67 #define to_csrow(slot, ch, branch) \
68 (to_channel(ch, branch) | ((slot) << 2))
72 * All 3 functions of Device 16 (0,1,2) share the SAME DID and
73 * uses PCI_DEVICE_ID_INTEL_I7300_MCH_ERR for device 16 (0,1,2),
74 * PCI_DEVICE_ID_INTEL_I7300_MCH_FB0 and PCI_DEVICE_ID_INTEL_I7300_MCH_FB1
75 * for device 21 (0,1).
78 /****************************************************
79 * i7300 Register definitions for memory enumberation
80 ****************************************************/
84 * Function 0: System Address (not documented)
85 * Function 1: Memory Branch Map, Control, Errors Register
88 /* OFFSETS for Function 0 */
89 #define AMBASE 0x48 /* AMB Mem Mapped Reg Region Base */
90 #define MAXCH 0x56 /* Max Channel Number */
91 #define MAXDIMMPERCH 0x57 /* Max DIMM PER Channel Number */
93 /* OFFSETS for Function 1 */
94 #define MC_SETTINGS 0x40
95 #define IS_MIRRORED(mc) ((mc) & (1 << 16))
96 #define IS_ECC_ENABLED(mc) ((mc) & (1 << 5))
97 #define IS_RETRY_ENABLED(mc) ((mc) & (1 << 31))
98 #define IS_SCRBALGO_ENHANCED(mc) ((mc) & (1 << 8))
100 #define MC_SETTINGS_A 0x58
101 #define IS_SINGLE_MODE(mca) ((mca) & (1 << 14))
111 * Note: Other Intel EDAC drivers use AMBPRESENT to identify if the available
112 * memory. From datasheet item 7.3.1 (FB-DIMM technology & organization), it
113 * seems that we cannot use this information directly for the same usage.
114 * Each memory slot may have up to 2 AMB interfaces, one for income and another
115 * for outcome interface to the next slot.
116 * For now, the driver just stores the AMB present registers, but rely only at
117 * the MTR info to detect memory.
118 * Datasheet is also not clear about how to map each AMBPRESENT registers to
119 * one of the 4 available channels.
121 #define AMBPRESENT_0 0x64
122 #define AMBPRESENT_1 0x66
124 const static u16 mtr_regs [MAX_SLOTS] = {
125 0x80, 0x84, 0x88, 0x8c,
126 0x82, 0x86, 0x8a, 0x8e
129 /* Defines to extract the vaious fields from the
130 * MTRx - Memory Technology Registers
132 #define MTR_DIMMS_PRESENT(mtr) ((mtr) & (1 << 8))
133 #define MTR_DIMMS_ETHROTTLE(mtr) ((mtr) & (1 << 7))
134 #define MTR_DRAM_WIDTH(mtr) (((mtr) & (1 << 6)) ? 8 : 4)
135 #define MTR_DRAM_BANKS(mtr) (((mtr) & (1 << 5)) ? 8 : 4)
136 #define MTR_DIMM_RANKS(mtr) (((mtr) & (1 << 4)) ? 1 : 0)
137 #define MTR_DIMM_ROWS(mtr) (((mtr) >> 2) & 0x3)
138 #define MTR_DRAM_BANKS_ADDR_BITS 2
139 #define MTR_DIMM_ROWS_ADDR_BITS(mtr) (MTR_DIMM_ROWS(mtr) + 13)
140 #define MTR_DIMM_COLS(mtr) ((mtr) & 0x3)
141 #define MTR_DIMM_COLS_ADDR_BITS(mtr) (MTR_DIMM_COLS(mtr) + 10)
143 #ifdef CONFIG_EDAC_DEBUG
145 static const char *numrow_toString[] = {
153 static const char *numcol_toString[] = {
154 "1,024 - 10 columns",
155 "2,048 - 11 columns",
156 "4,096 - 12 columns",
161 /************************************************
162 * i7300 Register definitions for error detection
163 ************************************************/
166 * Device 16.1: FBD Error Registers
168 #define FERR_FAT_FBD 0x98
169 static const char *ferr_fat_fbd_name[] = {
170 [22] = "Non-Redundant Fast Reset Timeout",
171 [2] = ">Tmid Thermal event with intelligent throttling disabled",
172 [1] = "Memory or FBD configuration CRC read error",
173 [0] = "Memory Write error on non-redundant retry or "
174 "FBD configuration Write error on retry",
176 #define GET_FBD_FAT_IDX(fbderr) (fbderr & (3 << 28))
177 #define FERR_FAT_FBD_ERR_MASK ((1 << 0) | (1 << 1) | (1 << 2) | (1 << 3))
179 #define FERR_NF_FBD 0xa0
180 static const char *ferr_nf_fbd_name[] = {
181 [24] = "DIMM-Spare Copy Completed",
182 [23] = "DIMM-Spare Copy Initiated",
183 [22] = "Redundant Fast Reset Timeout",
184 [21] = "Memory Write error on redundant retry",
185 [18] = "SPD protocol Error",
186 [17] = "FBD Northbound parity error on FBD Sync Status",
187 [16] = "Correctable Patrol Data ECC",
188 [15] = "Correctable Resilver- or Spare-Copy Data ECC",
189 [14] = "Correctable Mirrored Demand Data ECC",
190 [13] = "Correctable Non-Mirrored Demand Data ECC",
191 [11] = "Memory or FBD configuration CRC read error",
192 [10] = "FBD Configuration Write error on first attempt",
193 [9] = "Memory Write error on first attempt",
194 [8] = "Non-Aliased Uncorrectable Patrol Data ECC",
195 [7] = "Non-Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
196 [6] = "Non-Aliased Uncorrectable Mirrored Demand Data ECC",
197 [5] = "Non-Aliased Uncorrectable Non-Mirrored Demand Data ECC",
198 [4] = "Aliased Uncorrectable Patrol Data ECC",
199 [3] = "Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
200 [2] = "Aliased Uncorrectable Mirrored Demand Data ECC",
201 [1] = "Aliased Uncorrectable Non-Mirrored Demand Data ECC",
202 [0] = "Uncorrectable Data ECC on Replay",
204 #define GET_FBD_NF_IDX(fbderr) (fbderr & (3 << 28))
205 #define FERR_NF_FBD_ERR_MASK ((1 << 24) | (1 << 23) | (1 << 22) | (1 << 21) |\
206 (1 << 18) | (1 << 17) | (1 << 16) | (1 << 15) |\
207 (1 << 14) | (1 << 13) | (1 << 11) | (1 << 10) |\
208 (1 << 9) | (1 << 8) | (1 << 7) | (1 << 6) |\
209 (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) |\
212 #define EMASK_FBD 0xa8
213 #define EMASK_FBD_ERR_MASK ((1 << 27) | (1 << 26) | (1 << 25) | (1 << 24) |\
214 (1 << 22) | (1 << 21) | (1 << 20) | (1 << 19) |\
215 (1 << 18) | (1 << 17) | (1 << 16) | (1 << 14) |\
216 (1 << 13) | (1 << 12) | (1 << 11) | (1 << 10) |\
217 (1 << 9) | (1 << 8) | (1 << 7) | (1 << 6) |\
218 (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) |\
222 * Device 16.2: Global Error Registers
225 #define FERR_GLOBAL_HI 0x48
226 static const char *ferr_global_hi_name[] = {
227 [3] = "FSB 3 Fatal Error",
228 [2] = "FSB 2 Fatal Error",
229 [1] = "FSB 1 Fatal Error",
230 [0] = "FSB 0 Fatal Error",
232 #define ferr_global_hi_is_fatal(errno) 1
234 #define FERR_GLOBAL_LO 0x40
235 static const char *ferr_global_lo_name[] = {
236 [31] = "Internal MCH Fatal Error",
237 [30] = "Intel QuickData Technology Device Fatal Error",
238 [29] = "FSB1 Fatal Error",
239 [28] = "FSB0 Fatal Error",
240 [27] = "FBD Channel 3 Fatal Error",
241 [26] = "FBD Channel 2 Fatal Error",
242 [25] = "FBD Channel 1 Fatal Error",
243 [24] = "FBD Channel 0 Fatal Error",
244 [23] = "PCI Express Device 7Fatal Error",
245 [22] = "PCI Express Device 6 Fatal Error",
246 [21] = "PCI Express Device 5 Fatal Error",
247 [20] = "PCI Express Device 4 Fatal Error",
248 [19] = "PCI Express Device 3 Fatal Error",
249 [18] = "PCI Express Device 2 Fatal Error",
250 [17] = "PCI Express Device 1 Fatal Error",
251 [16] = "ESI Fatal Error",
252 [15] = "Internal MCH Non-Fatal Error",
253 [14] = "Intel QuickData Technology Device Non Fatal Error",
254 [13] = "FSB1 Non-Fatal Error",
255 [12] = "FSB 0 Non-Fatal Error",
256 [11] = "FBD Channel 3 Non-Fatal Error",
257 [10] = "FBD Channel 2 Non-Fatal Error",
258 [9] = "FBD Channel 1 Non-Fatal Error",
259 [8] = "FBD Channel 0 Non-Fatal Error",
260 [7] = "PCI Express Device 7 Non-Fatal Error",
261 [6] = "PCI Express Device 6 Non-Fatal Error",
262 [5] = "PCI Express Device 5 Non-Fatal Error",
263 [4] = "PCI Express Device 4 Non-Fatal Error",
264 [3] = "PCI Express Device 3 Non-Fatal Error",
265 [2] = "PCI Express Device 2 Non-Fatal Error",
266 [1] = "PCI Express Device 1 Non-Fatal Error",
267 [0] = "ESI Non-Fatal Error",
269 #define ferr_global_lo_is_fatal(errno) ((errno < 16) ? 0 : 1)
271 /* Device name and register DID (Device ID) */
272 struct i7300_dev_info {
273 const char *ctl_name; /* name for this device */
274 u16 fsb_mapping_errors; /* DID for the branchmap,control */
277 /* Table of devices attributes supported by this driver */
278 static const struct i7300_dev_info i7300_devs[] = {
281 .fsb_mapping_errors = PCI_DEVICE_ID_INTEL_I7300_MCH_ERR,
285 struct i7300_dimm_info {
286 int megabytes; /* size, 0 means not present */
289 /* driver private data structure */
291 struct pci_dev *pci_dev_16_0_fsb_ctlr; /* 16.0 */
292 struct pci_dev *pci_dev_16_1_fsb_addr_map; /* 16.1 */
293 struct pci_dev *pci_dev_16_2_fsb_err_regs; /* 16.2 */
294 struct pci_dev *pci_dev_2x_0_fbd_branch[MAX_BRANCHES]; /* 21.0 and 22.0 */
296 u16 tolm; /* top of low memory */
297 u64 ambase; /* AMB BAR */
299 u32 mc_settings; /* Report several settings */
302 u16 mir[MAX_MIR]; /* Memory Interleave Reg*/
304 u16 mtr[MAX_SLOTS][MAX_BRANCHES]; /* Memory Technlogy Reg */
305 u16 ambpresent[MAX_CHANNELS]; /* AMB present regs */
307 /* DIMM information matrix, allocating architecture maximums */
308 struct i7300_dimm_info dimm_info[MAX_SLOTS][MAX_CHANNELS];
311 /* FIXME: Why do we need to have this static? */
312 static struct edac_pci_ctl_info *i7300_pci;
314 /********************************************
315 * i7300 Functions related to error detection
316 ********************************************/
318 const char *get_err_from_table(const char *table[], int size, int pos)
326 #define GET_ERR_FROM_TABLE(table, pos) \
327 get_err_from_table(table, ARRAY_SIZE(table), pos)
330 * i7300_process_error_global Retrieve the hardware error information from
331 * the hardware and cache it in the 'info'
334 static void i7300_process_error_global(struct mem_ctl_info *mci)
336 struct i7300_pvt *pvt;
338 unsigned long errors;
339 const char *specific;
344 /* read in the 1st FATAL error register */
345 pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
346 FERR_GLOBAL_HI, &value);
347 if (unlikely(value)) {
349 errnum = find_first_bit(&errors,
350 ARRAY_SIZE(ferr_global_hi_name));
351 specific = GET_ERR_FROM_TABLE(ferr_global_hi_name, errnum);
352 is_fatal = ferr_global_hi_is_fatal(errnum);
354 /* Clear the error bit */
355 pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
356 FERR_GLOBAL_HI, value);
361 pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
362 FERR_GLOBAL_LO, &value);
363 if (unlikely(value)) {
365 errnum = find_first_bit(&errors,
366 ARRAY_SIZE(ferr_global_lo_name));
367 specific = GET_ERR_FROM_TABLE(ferr_global_lo_name, errnum);
368 is_fatal = ferr_global_lo_is_fatal(errnum);
370 /* Clear the error bit */
371 pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
372 FERR_GLOBAL_LO, value);
379 i7300_mc_printk(mci, KERN_EMERG, "%s misc error: %s\n",
380 is_fatal ? "Fatal" : "NOT fatal", specific);
384 * i7300_process_fbd_error Retrieve the hardware error information from
385 * the hardware and cache it in the 'info'
388 static void i7300_process_fbd_error(struct mem_ctl_info *mci)
390 struct i7300_pvt *pvt;
393 unsigned long errors;
394 const char *specific;
399 /* read in the 1st FATAL error register */
400 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
401 FERR_FAT_FBD, &value);
402 if (unlikely(value & FERR_FAT_FBD_ERR_MASK)) {
403 errors = value & FERR_FAT_FBD_ERR_MASK ;
404 errnum = find_first_bit(&errors,
405 ARRAY_SIZE(ferr_fat_fbd_name));
406 specific = GET_ERR_FROM_TABLE(ferr_fat_fbd_name, errnum);
409 branch = (GET_FBD_FAT_IDX(value) == 2) ? 1 : 0;
414 /* read in the 1st NON-FATAL error register */
415 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
416 FERR_NF_FBD, &value);
417 if (unlikely(value & FERR_NF_FBD_ERR_MASK)) {
418 errors = value & FERR_NF_FBD_ERR_MASK;
419 errnum = find_first_bit(&errors,
420 ARRAY_SIZE(ferr_nf_fbd_name));
421 specific = GET_ERR_FROM_TABLE(ferr_nf_fbd_name, errnum);
424 /* Clear the error bit */
425 pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
426 FERR_GLOBAL_LO, value);
433 i7300_mc_printk(mci, KERN_EMERG, "%s FBD error on branch %d: %s\n",
434 is_fatal ? "Fatal" : "NOT fatal", branch, specific);
438 * i7300_check_error Retrieve the hardware error information from
439 * the hardware and cache it in the 'info'
442 static void i7300_check_error(struct mem_ctl_info *mci)
444 i7300_process_error_global(mci);
445 i7300_process_fbd_error(mci);
449 * i7300_clear_error Retrieve any error from the hardware
450 * but do NOT process that error.
451 * Used for 'clearing' out of previous errors
452 * Called by the Core module.
454 static void i7300_clear_error(struct mem_ctl_info *mci)
456 struct i7300_pvt *pvt = mci->pvt_info;
459 * All error values are RWC - we need to read and write 1 to the
460 * bit that we want to cleanup
463 /* Clear global error registers */
464 pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
465 FERR_GLOBAL_HI, &value);
466 pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
467 FERR_GLOBAL_HI, value);
469 pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
470 FERR_GLOBAL_LO, &value);
471 pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
472 FERR_GLOBAL_LO, value);
474 /* Clear FBD error registers */
475 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
476 FERR_FAT_FBD, &value);
477 pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
478 FERR_FAT_FBD, value);
480 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
481 FERR_NF_FBD, &value);
482 pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
487 * i7300_enable_error_reporting
488 * Turn on the memory reporting features of the hardware
490 static void i7300_enable_error_reporting(struct mem_ctl_info *mci)
492 struct i7300_pvt *pvt = mci->pvt_info;
495 /* Read the FBD Error Mask Register */
496 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
497 EMASK_FBD, &fbd_error_mask);
499 /* Enable with a '0' */
500 fbd_error_mask &= ~(EMASK_FBD_ERR_MASK);
502 pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
503 EMASK_FBD, fbd_error_mask);
506 /************************************************
507 * i7300 Functions related to memory enumberation
508 ************************************************/
511 * determine_mtr(pvt, csrow, channel)
513 * return the proper MTR register as determine by the csrow and desired channel
515 static int decode_mtr(struct i7300_pvt *pvt,
516 int slot, int ch, int branch,
517 struct i7300_dimm_info *dinfo,
518 struct csrow_info *p_csrow)
520 int mtr, ans, addrBits, channel;
522 channel = to_channel(ch, branch);
524 mtr = pvt->mtr[slot][branch];
525 ans = MTR_DIMMS_PRESENT(mtr) ? 1 : 0;
527 debugf2("\tMTR%d CH%d: DIMMs are %s (mtr)\n",
529 ans ? "Present" : "NOT Present");
531 /* Determine if there is a DIMM present in this DIMM slot */
534 if (!amb_present || !ans)
541 /* Start with the number of bits for a Bank
543 addrBits = MTR_DRAM_BANKS_ADDR_BITS;
544 /* Add thenumber of ROW bits */
545 addrBits += MTR_DIMM_ROWS_ADDR_BITS(mtr);
546 /* add the number of COLUMN bits */
547 addrBits += MTR_DIMM_COLS_ADDR_BITS(mtr);
548 /* add the number of RANK bits */
549 addrBits += MTR_DIMM_RANKS(mtr);
551 addrBits += 6; /* add 64 bits per DIMM */
552 addrBits -= 20; /* divide by 2^^20 */
553 addrBits -= 3; /* 8 bits per bytes */
555 dinfo->megabytes = 1 << addrBits;
557 debugf2("\t\tWIDTH: x%d\n", MTR_DRAM_WIDTH(mtr));
559 debugf2("\t\tELECTRICAL THROTTLING is %s\n",
560 MTR_DIMMS_ETHROTTLE(mtr) ? "enabled" : "disabled");
562 debugf2("\t\tNUMBANK: %d bank(s)\n", MTR_DRAM_BANKS(mtr));
563 debugf2("\t\tNUMRANK: %s\n", MTR_DIMM_RANKS(mtr) ? "double" : "single");
564 debugf2("\t\tNUMROW: %s\n", numrow_toString[MTR_DIMM_ROWS(mtr)]);
565 debugf2("\t\tNUMCOL: %s\n", numcol_toString[MTR_DIMM_COLS(mtr)]);
566 debugf2("\t\tSIZE: %d MB\n", dinfo->megabytes);
569 p_csrow->nr_pages = dinfo->megabytes << 8;
570 p_csrow->mtype = MEM_FB_DDR2;
573 * The type of error detection actually depends of the
574 * mode of operation. When it is just one single memory chip, at
575 * socket 0, channel 0, it uses 8-byte-over-32-byte SECDED+ code.
576 * In normal or mirrored mode, it uses Lockstep mode,
577 * with the possibility of using an extended algorithm for x8 memories
578 * See datasheet Sections 7.3.6 to 7.3.8
581 if (IS_SINGLE_MODE(pvt->mc_settings_a)) {
582 p_csrow->edac_mode = EDAC_SECDED;
583 debugf2("\t\tECC code is 8-byte-over-32-byte SECDED+ code\n");
585 debugf2("\t\tECC code is on Lockstep mode\n");
586 if (MTR_DRAM_WIDTH(mtr))
587 p_csrow->edac_mode = EDAC_S8ECD8ED;
589 p_csrow->edac_mode = EDAC_S4ECD4ED;
592 /* ask what device type on this row */
593 if (MTR_DRAM_WIDTH(mtr)) {
594 debugf2("\t\tScrub algorithm for x8 is on %s mode\n",
595 IS_SCRBALGO_ENHANCED(pvt->mc_settings) ?
596 "enhanced" : "normal");
598 p_csrow->dtype = DEV_X8;
600 p_csrow->dtype = DEV_X4;
608 * also will output a DIMM matrix map, if debug is enabled, for viewing
609 * how the DIMMs are populated
611 static void print_dimm_size(struct i7300_pvt *pvt)
613 struct i7300_dimm_info *dinfo;
614 char *p, *mem_buffer;
619 mem_buffer = p = kmalloc(space, GFP_KERNEL);
621 i7300_printk(KERN_ERR, "MC: %s:%s() kmalloc() failed\n",
626 n = snprintf(p, space, " ");
629 for (channel = 0; channel < MAX_CHANNELS; channel++) {
630 n = snprintf(p, space, "channel %d | ", channel);
634 debugf2("%s\n", mem_buffer);
637 n = snprintf(p, space, "-------------------------------"
638 "------------------------------");
641 debugf2("%s\n", mem_buffer);
645 for (slot = 0; slot < MAX_SLOTS; slot++) {
646 n = snprintf(p, space, "csrow/SLOT %d ", slot);
650 for (channel = 0; channel < MAX_CHANNELS; channel++) {
651 dinfo = &pvt->dimm_info[slot][channel];
652 n = snprintf(p, space, "%4d MB | ", dinfo->megabytes);
657 debugf2("%s\n", mem_buffer);
662 n = snprintf(p, space, "-------------------------------"
663 "------------------------------");
666 debugf2("%s\n", mem_buffer);
674 * i7300_init_csrows Initialize the 'csrows' table within
675 * the mci control structure with the
676 * addressing of memory.
680 * 1 no actual memory found on this MC
682 static int i7300_init_csrows(struct mem_ctl_info *mci)
684 struct i7300_pvt *pvt;
685 struct i7300_dimm_info *dinfo;
686 struct csrow_info *p_csrow;
689 int ch, branch, slot, channel;
693 empty = 1; /* Assume NO memory */
695 debugf2("Memory Technology Registers:\n");
697 /* Get the AMB present registers for the four channels */
698 for (branch = 0; branch < MAX_BRANCHES; branch++) {
699 /* Read and dump branch 0's MTRs */
700 channel = to_channel(0, branch);
701 pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch], AMBPRESENT_0,
702 &pvt->ambpresent[channel]);
703 debugf2("\t\tAMB-present CH%d = 0x%x:\n",
704 channel, pvt->ambpresent[channel]);
706 channel = to_channel(1, branch);
707 pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch], AMBPRESENT_1,
708 &pvt->ambpresent[channel]);
709 debugf2("\t\tAMB-present CH%d = 0x%x:\n",
710 channel, pvt->ambpresent[channel]);
713 /* Get the set of MTR[0-7] regs by each branch */
714 for (slot = 0; slot < MAX_SLOTS; slot++) {
715 int where = mtr_regs[slot];
716 for (branch = 0; branch < MAX_BRANCHES; branch++) {
717 pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch],
719 &pvt->mtr[slot][branch]);
720 for (ch = 0; ch < MAX_BRANCHES; ch++) {
721 int channel = to_channel(ch, branch);
723 dinfo = &pvt->dimm_info[slot][channel];
724 p_csrow = &mci->csrows[slot];
726 mtr = decode_mtr(pvt, slot, ch, branch,
728 /* if no DIMMS on this row, continue */
729 if (!MTR_DIMMS_PRESENT(mtr))
732 p_csrow->csrow_idx = slot;
734 /* FAKE OUT VALUES, FIXME */
735 p_csrow->first_page = 0 + slot * 20;
736 p_csrow->last_page = 9 + slot * 20;
737 p_csrow->page_mask = 0xfff;
747 static void decode_mir(int mir_no, u16 mir[MAX_MIR])
750 debugf2("MIR%d: limit= 0x%x Branch(es) that participate: %s %s\n",
752 (mir[mir_no] >> 4) & 0xfff,
753 (mir[mir_no] & 1) ? "B0" : "",
754 (mir[mir_no] & 2) ? "B1": "");
758 * i7300_get_mc_regs read in the necessary registers and
761 * Fills in the private data members
763 static int i7300_get_mc_regs(struct mem_ctl_info *mci)
765 struct i7300_pvt *pvt;
771 pci_read_config_dword(pvt->pci_dev_16_0_fsb_ctlr, AMBASE,
772 (u32 *) &pvt->ambase);
774 debugf2("AMBASE= 0x%lx\n", (long unsigned int)pvt->ambase);
776 /* Get the Branch Map regs */
777 pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, TOLM, &pvt->tolm);
779 debugf2("TOLM (number of 256M regions) =%u (0x%x)\n", pvt->tolm,
782 actual_tolm = (u32) ((1000l * pvt->tolm) >> (30 - 28));
783 debugf2("Actual TOLM byte addr=%u.%03u GB (0x%x)\n",
784 actual_tolm/1000, actual_tolm % 1000, pvt->tolm << 28);
786 /* Get memory controller settings */
787 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS,
789 pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS_A,
790 &pvt->mc_settings_a);
792 if (IS_SINGLE_MODE(pvt->mc_settings_a))
793 debugf0("Memory controller operating on single mode\n");
795 debugf0("Memory controller operating on %s mode\n",
796 IS_MIRRORED(pvt->mc_settings) ? "mirrored" : "non-mirrored");
798 debugf0("Error detection is %s\n",
799 IS_ECC_ENABLED(pvt->mc_settings) ? "enabled" : "disabled");
800 debugf0("Retry is %s\n",
801 IS_RETRY_ENABLED(pvt->mc_settings) ? "enabled" : "disabled");
803 /* Get Memory Interleave Range registers */
804 pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR0, &pvt->mir[0]);
805 pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR1, &pvt->mir[1]);
806 pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR2, &pvt->mir[2]);
808 /* Decode the MIR regs */
809 for (i = 0; i < MAX_MIR; i++)
810 decode_mir(i, pvt->mir);
812 rc = i7300_init_csrows(mci);
816 /* Go and determine the size of each DIMM and place in an
818 print_dimm_size(pvt);
823 /*************************************************
824 * i7300 Functions related to device probe/release
825 *************************************************/
828 * i7300_put_devices 'put' all the devices that we have
831 static void i7300_put_devices(struct mem_ctl_info *mci)
833 struct i7300_pvt *pvt;
838 /* Decrement usage count for devices */
839 for (branch = 0; branch < MAX_CH_PER_BRANCH; branch++)
840 pci_dev_put(pvt->pci_dev_2x_0_fbd_branch[branch]);
841 pci_dev_put(pvt->pci_dev_16_2_fsb_err_regs);
842 pci_dev_put(pvt->pci_dev_16_1_fsb_addr_map);
846 * i7300_get_devices Find and perform 'get' operation on the MCH's
847 * device/functions we want to reference for this driver
849 * Need to 'get' device 16 func 1 and func 2
851 static int i7300_get_devices(struct mem_ctl_info *mci, int dev_idx)
853 struct i7300_pvt *pvt;
854 struct pci_dev *pdev;
858 /* Attempt to 'get' the MCH register we want */
860 while (!pvt->pci_dev_16_1_fsb_addr_map || !pvt->pci_dev_16_2_fsb_err_regs) {
861 pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
862 PCI_DEVICE_ID_INTEL_I7300_MCH_ERR, pdev);
864 /* End of list, leave */
865 i7300_printk(KERN_ERR,
866 "'system address,Process Bus' "
868 "vendor 0x%x device 0x%x ERR funcs "
871 PCI_DEVICE_ID_INTEL_I7300_MCH_ERR);
875 /* Store device 16 funcs 1 and 2 */
876 switch (PCI_FUNC(pdev->devfn)) {
878 pvt->pci_dev_16_1_fsb_addr_map = pdev;
881 pvt->pci_dev_16_2_fsb_err_regs = pdev;
886 debugf1("System Address, processor bus- PCI Bus ID: %s %x:%x\n",
887 pci_name(pvt->pci_dev_16_0_fsb_ctlr),
888 pvt->pci_dev_16_0_fsb_ctlr->vendor, pvt->pci_dev_16_0_fsb_ctlr->device);
889 debugf1("Branchmap, control and errors - PCI Bus ID: %s %x:%x\n",
890 pci_name(pvt->pci_dev_16_1_fsb_addr_map),
891 pvt->pci_dev_16_1_fsb_addr_map->vendor, pvt->pci_dev_16_1_fsb_addr_map->device);
892 debugf1("FSB Error Regs - PCI Bus ID: %s %x:%x\n",
893 pci_name(pvt->pci_dev_16_2_fsb_err_regs),
894 pvt->pci_dev_16_2_fsb_err_regs->vendor, pvt->pci_dev_16_2_fsb_err_regs->device);
896 pvt->pci_dev_2x_0_fbd_branch[0] = pci_get_device(PCI_VENDOR_ID_INTEL,
897 PCI_DEVICE_ID_INTEL_I7300_MCH_FB0,
899 if (!pvt->pci_dev_2x_0_fbd_branch[0]) {
900 i7300_printk(KERN_ERR,
901 "MC: 'BRANCH 0' device not found:"
902 "vendor 0x%x device 0x%x Func 0 (broken BIOS?)\n",
903 PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_FB0);
907 pvt->pci_dev_2x_0_fbd_branch[1] = pci_get_device(PCI_VENDOR_ID_INTEL,
908 PCI_DEVICE_ID_INTEL_I7300_MCH_FB1,
910 if (!pvt->pci_dev_2x_0_fbd_branch[1]) {
911 i7300_printk(KERN_ERR,
912 "MC: 'BRANCH 1' device not found:"
913 "vendor 0x%x device 0x%x Func 0 "
916 PCI_DEVICE_ID_INTEL_I7300_MCH_FB1);
923 i7300_put_devices(mci);
928 * i7300_probe1 Probe for ONE instance of device to see if it is
931 * 0 for FOUND a device
934 static int i7300_probe1(struct pci_dev *pdev, int dev_idx)
936 struct mem_ctl_info *mci;
937 struct i7300_pvt *pvt;
939 int num_dimms_per_channel;
942 if (dev_idx >= ARRAY_SIZE(i7300_devs))
945 debugf0("MC: " __FILE__ ": %s(), pdev bus %u dev=0x%x fn=0x%x\n",
948 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
950 /* We only are looking for func 0 of the set */
951 if (PCI_FUNC(pdev->devfn) != 0)
954 /* As we don't have a motherboard identification routine to determine
955 * actual number of slots/dimms per channel, we thus utilize the
956 * resource as specified by the chipset. Thus, we might have
957 * have more DIMMs per channel than actually on the mobo, but this
958 * allows the driver to support upto the chipset max, without
959 * some fancy mobo determination.
961 num_dimms_per_channel = MAX_SLOTS;
962 num_channels = MAX_CHANNELS;
963 num_csrows = MAX_SLOTS * MAX_CHANNELS;
965 debugf0("MC: %s(): Number of - Channels= %d DIMMS= %d CSROWS= %d\n",
966 __func__, num_channels, num_dimms_per_channel, num_csrows);
968 /* allocate a new MC control structure */
969 mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, 0);
974 debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci);
976 mci->dev = &pdev->dev; /* record ptr to the generic device */
979 pvt->pci_dev_16_0_fsb_ctlr = pdev; /* Record this device in our private */
981 /* 'get' the pci devices we want to reserve for our use */
982 if (i7300_get_devices(mci, dev_idx))
986 mci->mtype_cap = MEM_FLAG_FB_DDR2;
987 mci->edac_ctl_cap = EDAC_FLAG_NONE;
988 mci->edac_cap = EDAC_FLAG_NONE;
989 mci->mod_name = "i7300_edac.c";
990 mci->mod_ver = I7300_REVISION;
991 mci->ctl_name = i7300_devs[dev_idx].ctl_name;
992 mci->dev_name = pci_name(pdev);
993 mci->ctl_page_to_phys = NULL;
995 /* Set the function pointer to an actual operation function */
996 mci->edac_check = i7300_check_error;
998 /* initialize the MC control structure 'csrows' table
999 * with the mapping and control information */
1000 if (i7300_get_mc_regs(mci)) {
1001 debugf0("MC: Setting mci->edac_cap to EDAC_FLAG_NONE\n"
1002 " because i7300_init_csrows() returned nonzero "
1004 mci->edac_cap = EDAC_FLAG_NONE; /* no csrows found */
1006 debugf1("MC: Enable error reporting now\n");
1007 i7300_enable_error_reporting(mci);
1010 /* add this new MC control structure to EDAC's list of MCs */
1011 if (edac_mc_add_mc(mci)) {
1012 debugf0("MC: " __FILE__
1013 ": %s(): failed edac_mc_add_mc()\n", __func__);
1014 /* FIXME: perhaps some code should go here that disables error
1015 * reporting if we just enabled it
1020 i7300_clear_error(mci);
1022 /* allocating generic PCI control info */
1023 i7300_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
1026 "%s(): Unable to create PCI control\n",
1029 "%s(): PCI error report via EDAC not setup\n",
1035 /* Error exit unwinding stack */
1038 i7300_put_devices(mci);
1046 * i7300_init_one constructor for one instance of device
1052 static int __devinit i7300_init_one(struct pci_dev *pdev,
1053 const struct pci_device_id *id)
1057 debugf0("MC: " __FILE__ ": %s()\n", __func__);
1059 /* wake up device */
1060 rc = pci_enable_device(pdev);
1064 /* now probe and enable the device */
1065 return i7300_probe1(pdev, id->driver_data);
1069 * i7300_remove_one destructor for one instance of device
1072 static void __devexit i7300_remove_one(struct pci_dev *pdev)
1074 struct mem_ctl_info *mci;
1076 debugf0(__FILE__ ": %s()\n", __func__);
1079 edac_pci_release_generic_ctl(i7300_pci);
1081 mci = edac_mc_del_mc(&pdev->dev);
1085 /* retrieve references to resources, and free those resources */
1086 i7300_put_devices(mci);
1092 * pci_device_id table for which devices we are looking for
1094 * The "E500P" device is the first device supported.
1096 static const struct pci_device_id i7300_pci_tbl[] __devinitdata = {
1097 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_ERR)},
1098 {0,} /* 0 terminated list. */
1101 MODULE_DEVICE_TABLE(pci, i7300_pci_tbl);
1104 * i7300_driver pci_driver structure for this module
1107 static struct pci_driver i7300_driver = {
1108 .name = "i7300_edac",
1109 .probe = i7300_init_one,
1110 .remove = __devexit_p(i7300_remove_one),
1111 .id_table = i7300_pci_tbl,
1115 * i7300_init Module entry function
1116 * Try to initialize this module for its devices
1118 static int __init i7300_init(void)
1122 debugf2("MC: " __FILE__ ": %s()\n", __func__);
1124 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
1127 pci_rc = pci_register_driver(&i7300_driver);
1129 return (pci_rc < 0) ? pci_rc : 0;
1133 * i7300_exit() Module exit function
1134 * Unregister the driver
1136 static void __exit i7300_exit(void)
1138 debugf2("MC: " __FILE__ ": %s()\n", __func__);
1139 pci_unregister_driver(&i7300_driver);
1142 module_init(i7300_init);
1143 module_exit(i7300_exit);
1145 MODULE_LICENSE("GPL");
1146 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
1147 MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
1148 MODULE_DESCRIPTION("MC Driver for Intel I7300 memory controllers - "
1151 module_param(edac_op_state, int, 0444);
1152 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");