1 #include "amd64_edac.h"
2 #include <asm/amd_nb.h>
4 static struct edac_pci_ctl_info *pci_ctl;
6 static int report_gart_errors;
7 module_param(report_gart_errors, int, 0644);
10 * Set by command line parameter. If BIOS has enabled the ECC, this override is
11 * cleared to prevent re-enabling the hardware by this driver.
13 static int ecc_enable_override;
14 module_param(ecc_enable_override, int, 0644);
16 static struct msr __percpu *msrs;
19 static struct ecc_settings **ecc_stngs;
22 * Valid scrub rates for the K8 hardware memory scrubber. We map the scrubbing
23 * bandwidth to a valid bit pattern. The 'set' operation finds the 'matching-
26 *FIXME: Produce a better mapping/linearisation.
28 static const struct scrubrate {
29 u32 scrubval; /* bit pattern for scrub rate */
30 u32 bandwidth; /* bandwidth consumed (bytes/sec) */
32 { 0x01, 1600000000UL},
54 { 0x00, 0UL}, /* scrubbing off */
57 int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset,
58 u32 *val, const char *func)
62 err = pci_read_config_dword(pdev, offset, val);
64 amd64_warn("%s: error reading F%dx%03x.\n",
65 func, PCI_FUNC(pdev->devfn), offset);
70 int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset,
71 u32 val, const char *func)
75 err = pci_write_config_dword(pdev, offset, val);
77 amd64_warn("%s: error writing to F%dx%03x.\n",
78 func, PCI_FUNC(pdev->devfn), offset);
84 * Select DCT to which PCI cfg accesses are routed
86 static void f15h_select_dct(struct amd64_pvt *pvt, u8 dct)
90 amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, ®);
91 reg &= (pvt->model == 0x30) ? ~3 : ~1;
93 amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
98 * Depending on the family, F2 DCT reads need special handling:
100 * K8: has a single DCT only and no address offsets >= 0x100
102 * F10h: each DCT has its own set of regs
106 * F16h: has only 1 DCT
108 * F15h: we select which DCT we access using F1x10C[DctCfgSel]
110 static inline int amd64_read_dct_pci_cfg(struct amd64_pvt *pvt, u8 dct,
111 int offset, u32 *val)
115 if (dct || offset >= 0x100)
122 * Note: If ganging is enabled, barring the regs
123 * F2x[1,0]98 and F2x[1,0]9C; reads reads to F2x1xx
124 * return 0. (cf. Section 2.8.1 F10h BKDG)
126 if (dct_ganging_enabled(pvt))
135 * F15h: F2x1xx addresses do not map explicitly to DCT1.
136 * We should select which DCT we access using F1x10C[DctCfgSel]
138 dct = (dct && pvt->model == 0x30) ? 3 : dct;
139 f15h_select_dct(pvt, dct);
150 return amd64_read_pci_cfg(pvt->F2, offset, val);
154 * Memory scrubber control interface. For K8, memory scrubbing is handled by
155 * hardware and can involve L2 cache, dcache as well as the main memory. With
156 * F10, this is extended to L3 cache scrubbing on CPU models sporting that
159 * This causes the "units" for the scrubbing speed to vary from 64 byte blocks
160 * (dram) over to cache lines. This is nasty, so we will use bandwidth in
161 * bytes/sec for the setting.
163 * Currently, we only do dram scrubbing. If the scrubbing is done in software on
164 * other archs, we might not have access to the caches directly.
167 static inline void __f17h_set_scrubval(struct amd64_pvt *pvt, u32 scrubval)
170 * Fam17h supports scrub values between 0x5 and 0x14. Also, the values
171 * are shifted down by 0x5, so scrubval 0x5 is written to the register
172 * as 0x0, scrubval 0x6 as 0x1, etc.
174 if (scrubval >= 0x5 && scrubval <= 0x14) {
176 pci_write_bits32(pvt->F6, F17H_SCR_LIMIT_ADDR, scrubval, 0xF);
177 pci_write_bits32(pvt->F6, F17H_SCR_BASE_ADDR, 1, 0x1);
179 pci_write_bits32(pvt->F6, F17H_SCR_BASE_ADDR, 0, 0x1);
183 * Scan the scrub rate mapping table for a close or matching bandwidth value to
184 * issue. If requested is too big, then use last maximum value found.
186 static int __set_scrub_rate(struct amd64_pvt *pvt, u32 new_bw, u32 min_rate)
192 * map the configured rate (new_bw) to a value specific to the AMD64
193 * memory controller and apply to register. Search for the first
194 * bandwidth entry that is greater or equal than the setting requested
195 * and program that. If at last entry, turn off DRAM scrubbing.
197 * If no suitable bandwidth is found, turn off DRAM scrubbing entirely
198 * by falling back to the last element in scrubrates[].
200 for (i = 0; i < ARRAY_SIZE(scrubrates) - 1; i++) {
202 * skip scrub rates which aren't recommended
203 * (see F10 BKDG, F3x58)
205 if (scrubrates[i].scrubval < min_rate)
208 if (scrubrates[i].bandwidth <= new_bw)
212 scrubval = scrubrates[i].scrubval;
214 if (pvt->fam == 0x17 || pvt->fam == 0x18) {
215 __f17h_set_scrubval(pvt, scrubval);
216 } else if (pvt->fam == 0x15 && pvt->model == 0x60) {
217 f15h_select_dct(pvt, 0);
218 pci_write_bits32(pvt->F2, F15H_M60H_SCRCTRL, scrubval, 0x001F);
219 f15h_select_dct(pvt, 1);
220 pci_write_bits32(pvt->F2, F15H_M60H_SCRCTRL, scrubval, 0x001F);
222 pci_write_bits32(pvt->F3, SCRCTRL, scrubval, 0x001F);
226 return scrubrates[i].bandwidth;
231 static int set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
233 struct amd64_pvt *pvt = mci->pvt_info;
234 u32 min_scrubrate = 0x5;
239 if (pvt->fam == 0x15) {
241 if (pvt->model < 0x10)
242 f15h_select_dct(pvt, 0);
244 if (pvt->model == 0x60)
247 return __set_scrub_rate(pvt, bw, min_scrubrate);
250 static int get_scrub_rate(struct mem_ctl_info *mci)
252 struct amd64_pvt *pvt = mci->pvt_info;
253 int i, retval = -EINVAL;
259 if (pvt->model < 0x10)
260 f15h_select_dct(pvt, 0);
262 if (pvt->model == 0x60)
263 amd64_read_pci_cfg(pvt->F2, F15H_M60H_SCRCTRL, &scrubval);
268 amd64_read_pci_cfg(pvt->F6, F17H_SCR_BASE_ADDR, &scrubval);
269 if (scrubval & BIT(0)) {
270 amd64_read_pci_cfg(pvt->F6, F17H_SCR_LIMIT_ADDR, &scrubval);
279 amd64_read_pci_cfg(pvt->F3, SCRCTRL, &scrubval);
283 scrubval = scrubval & 0x001F;
285 for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
286 if (scrubrates[i].scrubval == scrubval) {
287 retval = scrubrates[i].bandwidth;
295 * returns true if the SysAddr given by sys_addr matches the
296 * DRAM base/limit associated with node_id
298 static bool base_limit_match(struct amd64_pvt *pvt, u64 sys_addr, u8 nid)
302 /* The K8 treats this as a 40-bit value. However, bits 63-40 will be
303 * all ones if the most significant implemented address bit is 1.
304 * Here we discard bits 63-40. See section 3.4.2 of AMD publication
305 * 24592: AMD x86-64 Architecture Programmer's Manual Volume 1
306 * Application Programming.
308 addr = sys_addr & 0x000000ffffffffffull;
310 return ((addr >= get_dram_base(pvt, nid)) &&
311 (addr <= get_dram_limit(pvt, nid)));
315 * Attempt to map a SysAddr to a node. On success, return a pointer to the
316 * mem_ctl_info structure for the node that the SysAddr maps to.
318 * On failure, return NULL.
320 static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
323 struct amd64_pvt *pvt;
328 * Here we use the DRAM Base (section 3.4.4.1) and DRAM Limit (section
329 * 3.4.4.2) registers to map the SysAddr to a node ID.
334 * The value of this field should be the same for all DRAM Base
335 * registers. Therefore we arbitrarily choose to read it from the
336 * register for node 0.
338 intlv_en = dram_intlv_en(pvt, 0);
341 for (node_id = 0; node_id < DRAM_RANGES; node_id++) {
342 if (base_limit_match(pvt, sys_addr, node_id))
348 if (unlikely((intlv_en != 0x01) &&
349 (intlv_en != 0x03) &&
350 (intlv_en != 0x07))) {
351 amd64_warn("DRAM Base[IntlvEn] junk value: 0x%x, BIOS bug?\n", intlv_en);
355 bits = (((u32) sys_addr) >> 12) & intlv_en;
357 for (node_id = 0; ; ) {
358 if ((dram_intlv_sel(pvt, node_id) & intlv_en) == bits)
359 break; /* intlv_sel field matches */
361 if (++node_id >= DRAM_RANGES)
365 /* sanity test for sys_addr */
366 if (unlikely(!base_limit_match(pvt, sys_addr, node_id))) {
367 amd64_warn("%s: sys_addr 0x%llx falls outside base/limit address"
368 "range for node %d with node interleaving enabled.\n",
369 __func__, sys_addr, node_id);
374 return edac_mc_find((int)node_id);
377 edac_dbg(2, "sys_addr 0x%lx doesn't match any node\n",
378 (unsigned long)sys_addr);
384 * compute the CS base address of the @csrow on the DRAM controller @dct.
385 * For details see F2x[5C:40] in the processor's BKDG
387 static void get_cs_base_and_mask(struct amd64_pvt *pvt, int csrow, u8 dct,
388 u64 *base, u64 *mask)
390 u64 csbase, csmask, base_bits, mask_bits;
393 if (pvt->fam == 0xf && pvt->ext_model < K8_REV_F) {
394 csbase = pvt->csels[dct].csbases[csrow];
395 csmask = pvt->csels[dct].csmasks[csrow];
396 base_bits = GENMASK_ULL(31, 21) | GENMASK_ULL(15, 9);
397 mask_bits = GENMASK_ULL(29, 21) | GENMASK_ULL(15, 9);
401 * F16h and F15h, models 30h and later need two addr_shift values:
402 * 8 for high and 6 for low (cf. F16h BKDG).
404 } else if (pvt->fam == 0x16 ||
405 (pvt->fam == 0x15 && pvt->model >= 0x30)) {
406 csbase = pvt->csels[dct].csbases[csrow];
407 csmask = pvt->csels[dct].csmasks[csrow >> 1];
409 *base = (csbase & GENMASK_ULL(15, 5)) << 6;
410 *base |= (csbase & GENMASK_ULL(30, 19)) << 8;
413 /* poke holes for the csmask */
414 *mask &= ~((GENMASK_ULL(15, 5) << 6) |
415 (GENMASK_ULL(30, 19) << 8));
417 *mask |= (csmask & GENMASK_ULL(15, 5)) << 6;
418 *mask |= (csmask & GENMASK_ULL(30, 19)) << 8;
422 csbase = pvt->csels[dct].csbases[csrow];
423 csmask = pvt->csels[dct].csmasks[csrow >> 1];
426 if (pvt->fam == 0x15)
427 base_bits = mask_bits =
428 GENMASK_ULL(30,19) | GENMASK_ULL(13,5);
430 base_bits = mask_bits =
431 GENMASK_ULL(28,19) | GENMASK_ULL(13,5);
434 *base = (csbase & base_bits) << addr_shift;
437 /* poke holes for the csmask */
438 *mask &= ~(mask_bits << addr_shift);
440 *mask |= (csmask & mask_bits) << addr_shift;
443 #define for_each_chip_select(i, dct, pvt) \
444 for (i = 0; i < pvt->csels[dct].b_cnt; i++)
446 #define chip_select_base(i, dct, pvt) \
447 pvt->csels[dct].csbases[i]
449 #define for_each_chip_select_mask(i, dct, pvt) \
450 for (i = 0; i < pvt->csels[dct].m_cnt; i++)
453 * @input_addr is an InputAddr associated with the node given by mci. Return the
454 * csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr).
456 static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr)
458 struct amd64_pvt *pvt;
464 for_each_chip_select(csrow, 0, pvt) {
465 if (!csrow_enabled(csrow, 0, pvt))
468 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
472 if ((input_addr & mask) == (base & mask)) {
473 edac_dbg(2, "InputAddr 0x%lx matches csrow %d (node %d)\n",
474 (unsigned long)input_addr, csrow,
480 edac_dbg(2, "no matching csrow for InputAddr 0x%lx (MC node %d)\n",
481 (unsigned long)input_addr, pvt->mc_node_id);
487 * Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094)
488 * for the node represented by mci. Info is passed back in *hole_base,
489 * *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if
490 * info is invalid. Info may be invalid for either of the following reasons:
492 * - The revision of the node is not E or greater. In this case, the DRAM Hole
493 * Address Register does not exist.
495 * - The DramHoleValid bit is cleared in the DRAM Hole Address Register,
496 * indicating that its contents are not valid.
498 * The values passed back in *hole_base, *hole_offset, and *hole_size are
499 * complete 32-bit values despite the fact that the bitfields in the DHAR
500 * only represent bits 31-24 of the base and offset values.
502 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
503 u64 *hole_offset, u64 *hole_size)
505 struct amd64_pvt *pvt = mci->pvt_info;
507 /* only revE and later have the DRAM Hole Address Register */
508 if (pvt->fam == 0xf && pvt->ext_model < K8_REV_E) {
509 edac_dbg(1, " revision %d for node %d does not support DHAR\n",
510 pvt->ext_model, pvt->mc_node_id);
514 /* valid for Fam10h and above */
515 if (pvt->fam >= 0x10 && !dhar_mem_hoist_valid(pvt)) {
516 edac_dbg(1, " Dram Memory Hoisting is DISABLED on this system\n");
520 if (!dhar_valid(pvt)) {
521 edac_dbg(1, " Dram Memory Hoisting is DISABLED on this node %d\n",
526 /* This node has Memory Hoisting */
528 /* +------------------+--------------------+--------------------+-----
529 * | memory | DRAM hole | relocated |
530 * | [0, (x - 1)] | [x, 0xffffffff] | addresses from |
532 * | | | [0x100000000, |
533 * | | | (0x100000000+ |
534 * | | | (0xffffffff-x))] |
535 * +------------------+--------------------+--------------------+-----
537 * Above is a diagram of physical memory showing the DRAM hole and the
538 * relocated addresses from the DRAM hole. As shown, the DRAM hole
539 * starts at address x (the base address) and extends through address
540 * 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the
541 * addresses in the hole so that they start at 0x100000000.
544 *hole_base = dhar_base(pvt);
545 *hole_size = (1ULL << 32) - *hole_base;
547 *hole_offset = (pvt->fam > 0xf) ? f10_dhar_offset(pvt)
548 : k8_dhar_offset(pvt);
550 edac_dbg(1, " DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n",
551 pvt->mc_node_id, (unsigned long)*hole_base,
552 (unsigned long)*hole_offset, (unsigned long)*hole_size);
556 EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
559 * Return the DramAddr that the SysAddr given by @sys_addr maps to. It is
560 * assumed that sys_addr maps to the node given by mci.
562 * The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section
563 * 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a
564 * SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled,
565 * then it is also involved in translating a SysAddr to a DramAddr. Sections
566 * 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting.
567 * These parts of the documentation are unclear. I interpret them as follows:
569 * When node n receives a SysAddr, it processes the SysAddr as follows:
571 * 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM
572 * Limit registers for node n. If the SysAddr is not within the range
573 * specified by the base and limit values, then node n ignores the Sysaddr
574 * (since it does not map to node n). Otherwise continue to step 2 below.
576 * 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is
577 * disabled so skip to step 3 below. Otherwise see if the SysAddr is within
578 * the range of relocated addresses (starting at 0x100000000) from the DRAM
579 * hole. If not, skip to step 3 below. Else get the value of the
580 * DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the
581 * offset defined by this value from the SysAddr.
583 * 3. Obtain the base address for node n from the DRAMBase field of the DRAM
584 * Base register for node n. To obtain the DramAddr, subtract the base
585 * address from the SysAddr, as shown near the start of section 3.4.4 (p.70).
587 static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr)
589 struct amd64_pvt *pvt = mci->pvt_info;
590 u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
593 dram_base = get_dram_base(pvt, pvt->mc_node_id);
595 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
598 if ((sys_addr >= (1ULL << 32)) &&
599 (sys_addr < ((1ULL << 32) + hole_size))) {
600 /* use DHAR to translate SysAddr to DramAddr */
601 dram_addr = sys_addr - hole_offset;
603 edac_dbg(2, "using DHAR to translate SysAddr 0x%lx to DramAddr 0x%lx\n",
604 (unsigned long)sys_addr,
605 (unsigned long)dram_addr);
612 * Translate the SysAddr to a DramAddr as shown near the start of
613 * section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8
614 * only deals with 40-bit values. Therefore we discard bits 63-40 of
615 * sys_addr below. If bit 39 of sys_addr is 1 then the bits we
616 * discard are all 1s. Otherwise the bits we discard are all 0s. See
617 * section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture
618 * Programmer's Manual Volume 1 Application Programming.
620 dram_addr = (sys_addr & GENMASK_ULL(39, 0)) - dram_base;
622 edac_dbg(2, "using DRAM Base register to translate SysAddr 0x%lx to DramAddr 0x%lx\n",
623 (unsigned long)sys_addr, (unsigned long)dram_addr);
628 * @intlv_en is the value of the IntlvEn field from a DRAM Base register
629 * (section 3.4.4.1). Return the number of bits from a SysAddr that are used
630 * for node interleaving.
632 static int num_node_interleave_bits(unsigned intlv_en)
634 static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 };
637 BUG_ON(intlv_en > 7);
638 n = intlv_shift_table[intlv_en];
642 /* Translate the DramAddr given by @dram_addr to an InputAddr. */
643 static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr)
645 struct amd64_pvt *pvt;
652 * See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
653 * concerning translating a DramAddr to an InputAddr.
655 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
656 input_addr = ((dram_addr >> intlv_shift) & GENMASK_ULL(35, 12)) +
659 edac_dbg(2, " Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n",
660 intlv_shift, (unsigned long)dram_addr,
661 (unsigned long)input_addr);
667 * Translate the SysAddr represented by @sys_addr to an InputAddr. It is
668 * assumed that @sys_addr maps to the node given by mci.
670 static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
675 dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr));
677 edac_dbg(2, "SysAddr 0x%lx translates to InputAddr 0x%lx\n",
678 (unsigned long)sys_addr, (unsigned long)input_addr);
683 /* Map the Error address to a PAGE and PAGE OFFSET. */
684 static inline void error_address_to_page_and_offset(u64 error_address,
685 struct err_info *err)
687 err->page = (u32) (error_address >> PAGE_SHIFT);
688 err->offset = ((u32) error_address) & ~PAGE_MASK;
692 * @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address
693 * Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers
694 * of a node that detected an ECC memory error. mci represents the node that
695 * the error address maps to (possibly different from the node that detected
696 * the error). Return the number of the csrow that sys_addr maps to, or -1 on
699 static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
703 csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr));
706 amd64_mc_err(mci, "Failed to translate InputAddr to csrow for "
707 "address 0x%lx\n", (unsigned long)sys_addr);
711 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
714 * Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs
717 static unsigned long determine_edac_cap(struct amd64_pvt *pvt)
719 unsigned long edac_cap = EDAC_FLAG_NONE;
723 u8 i, umc_en_mask = 0, dimm_ecc_en_mask = 0;
725 for (i = 0; i < NUM_UMCS; i++) {
726 if (!(pvt->umc[i].sdp_ctrl & UMC_SDP_INIT))
729 umc_en_mask |= BIT(i);
731 /* UMC Configuration bit 12 (DimmEccEn) */
732 if (pvt->umc[i].umc_cfg & BIT(12))
733 dimm_ecc_en_mask |= BIT(i);
736 if (umc_en_mask == dimm_ecc_en_mask)
737 edac_cap = EDAC_FLAG_SECDED;
739 bit = (pvt->fam > 0xf || pvt->ext_model >= K8_REV_F)
743 if (pvt->dclr0 & BIT(bit))
744 edac_cap = EDAC_FLAG_SECDED;
750 static void debug_display_dimm_sizes(struct amd64_pvt *, u8);
752 static void debug_dump_dramcfg_low(struct amd64_pvt *pvt, u32 dclr, int chan)
754 edac_dbg(1, "F2x%d90 (DRAM Cfg Low): 0x%08x\n", chan, dclr);
756 if (pvt->dram_type == MEM_LRDDR3) {
757 u32 dcsm = pvt->csels[chan].csmasks[0];
759 * It's assumed all LRDIMMs in a DCT are going to be of
760 * same 'type' until proven otherwise. So, use a cs
761 * value of '0' here to get dcsm value.
763 edac_dbg(1, " LRDIMM %dx rank multiply\n", (dcsm & 0x3));
766 edac_dbg(1, "All DIMMs support ECC:%s\n",
767 (dclr & BIT(19)) ? "yes" : "no");
770 edac_dbg(1, " PAR/ERR parity: %s\n",
771 (dclr & BIT(8)) ? "enabled" : "disabled");
773 if (pvt->fam == 0x10)
774 edac_dbg(1, " DCT 128bit mode width: %s\n",
775 (dclr & BIT(11)) ? "128b" : "64b");
777 edac_dbg(1, " x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
778 (dclr & BIT(12)) ? "yes" : "no",
779 (dclr & BIT(13)) ? "yes" : "no",
780 (dclr & BIT(14)) ? "yes" : "no",
781 (dclr & BIT(15)) ? "yes" : "no");
784 static void debug_display_dimm_sizes_df(struct amd64_pvt *pvt, u8 ctrl)
786 int dimm, size0, size1, cs0, cs1;
788 edac_printk(KERN_DEBUG, EDAC_MC, "UMC%d chip selects:\n", ctrl);
790 for (dimm = 0; dimm < 4; dimm++) {
794 if (csrow_enabled(cs0, ctrl, pvt))
795 size0 = pvt->ops->dbam_to_cs(pvt, ctrl, 0, cs0);
800 if (csrow_enabled(cs1, ctrl, pvt))
801 size1 = pvt->ops->dbam_to_cs(pvt, ctrl, 0, cs1);
803 amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
809 static void __dump_misc_regs_df(struct amd64_pvt *pvt)
811 struct amd64_umc *umc;
812 u32 i, tmp, umc_base;
814 for (i = 0; i < NUM_UMCS; i++) {
815 umc_base = get_umc_base(i);
818 edac_dbg(1, "UMC%d DIMM cfg: 0x%x\n", i, umc->dimm_cfg);
819 edac_dbg(1, "UMC%d UMC cfg: 0x%x\n", i, umc->umc_cfg);
820 edac_dbg(1, "UMC%d SDP ctrl: 0x%x\n", i, umc->sdp_ctrl);
821 edac_dbg(1, "UMC%d ECC ctrl: 0x%x\n", i, umc->ecc_ctrl);
823 amd_smn_read(pvt->mc_node_id, umc_base + UMCCH_ECC_BAD_SYMBOL, &tmp);
824 edac_dbg(1, "UMC%d ECC bad symbol: 0x%x\n", i, tmp);
826 amd_smn_read(pvt->mc_node_id, umc_base + UMCCH_UMC_CAP, &tmp);
827 edac_dbg(1, "UMC%d UMC cap: 0x%x\n", i, tmp);
828 edac_dbg(1, "UMC%d UMC cap high: 0x%x\n", i, umc->umc_cap_hi);
830 edac_dbg(1, "UMC%d ECC capable: %s, ChipKill ECC capable: %s\n",
831 i, (umc->umc_cap_hi & BIT(30)) ? "yes" : "no",
832 (umc->umc_cap_hi & BIT(31)) ? "yes" : "no");
833 edac_dbg(1, "UMC%d All DIMMs support ECC: %s\n",
834 i, (umc->umc_cfg & BIT(12)) ? "yes" : "no");
835 edac_dbg(1, "UMC%d x4 DIMMs present: %s\n",
836 i, (umc->dimm_cfg & BIT(6)) ? "yes" : "no");
837 edac_dbg(1, "UMC%d x16 DIMMs present: %s\n",
838 i, (umc->dimm_cfg & BIT(7)) ? "yes" : "no");
840 if (pvt->dram_type == MEM_LRDDR4) {
841 amd_smn_read(pvt->mc_node_id, umc_base + UMCCH_ADDR_CFG, &tmp);
842 edac_dbg(1, "UMC%d LRDIMM %dx rank multiply\n",
843 i, 1 << ((tmp >> 4) & 0x3));
846 debug_display_dimm_sizes_df(pvt, i);
849 edac_dbg(1, "F0x104 (DRAM Hole Address): 0x%08x, base: 0x%08x\n",
850 pvt->dhar, dhar_base(pvt));
853 /* Display and decode various NB registers for debug purposes. */
854 static void __dump_misc_regs(struct amd64_pvt *pvt)
856 edac_dbg(1, "F3xE8 (NB Cap): 0x%08x\n", pvt->nbcap);
858 edac_dbg(1, " NB two channel DRAM capable: %s\n",
859 (pvt->nbcap & NBCAP_DCT_DUAL) ? "yes" : "no");
861 edac_dbg(1, " ECC capable: %s, ChipKill ECC capable: %s\n",
862 (pvt->nbcap & NBCAP_SECDED) ? "yes" : "no",
863 (pvt->nbcap & NBCAP_CHIPKILL) ? "yes" : "no");
865 debug_dump_dramcfg_low(pvt, pvt->dclr0, 0);
867 edac_dbg(1, "F3xB0 (Online Spare): 0x%08x\n", pvt->online_spare);
869 edac_dbg(1, "F1xF0 (DRAM Hole Address): 0x%08x, base: 0x%08x, offset: 0x%08x\n",
870 pvt->dhar, dhar_base(pvt),
871 (pvt->fam == 0xf) ? k8_dhar_offset(pvt)
872 : f10_dhar_offset(pvt));
874 debug_display_dimm_sizes(pvt, 0);
876 /* everything below this point is Fam10h and above */
880 debug_display_dimm_sizes(pvt, 1);
882 /* Only if NOT ganged does dclr1 have valid info */
883 if (!dct_ganging_enabled(pvt))
884 debug_dump_dramcfg_low(pvt, pvt->dclr1, 1);
887 /* Display and decode various NB registers for debug purposes. */
888 static void dump_misc_regs(struct amd64_pvt *pvt)
891 __dump_misc_regs_df(pvt);
893 __dump_misc_regs(pvt);
895 edac_dbg(1, " DramHoleValid: %s\n", dhar_valid(pvt) ? "yes" : "no");
897 amd64_info("using %s syndromes.\n",
898 ((pvt->ecc_sym_sz == 8) ? "x8" : "x4"));
902 * See BKDG, F2x[1,0][5C:40], F2[1,0][6C:60]
904 static void prep_chip_selects(struct amd64_pvt *pvt)
906 if (pvt->fam == 0xf && pvt->ext_model < K8_REV_F) {
907 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
908 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
909 } else if (pvt->fam == 0x15 && pvt->model == 0x30) {
910 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
911 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
913 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
914 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
919 * Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
921 static void read_dct_base_mask(struct amd64_pvt *pvt)
923 int base_reg0, base_reg1, mask_reg0, mask_reg1, cs;
925 prep_chip_selects(pvt);
928 base_reg0 = get_umc_base(0) + UMCCH_BASE_ADDR;
929 base_reg1 = get_umc_base(1) + UMCCH_BASE_ADDR;
930 mask_reg0 = get_umc_base(0) + UMCCH_ADDR_MASK;
931 mask_reg1 = get_umc_base(1) + UMCCH_ADDR_MASK;
939 for_each_chip_select(cs, 0, pvt) {
940 int reg0 = base_reg0 + (cs * 4);
941 int reg1 = base_reg1 + (cs * 4);
942 u32 *base0 = &pvt->csels[0].csbases[cs];
943 u32 *base1 = &pvt->csels[1].csbases[cs];
946 if (!amd_smn_read(pvt->mc_node_id, reg0, base0))
947 edac_dbg(0, " DCSB0[%d]=0x%08x reg: 0x%x\n",
950 if (!amd_smn_read(pvt->mc_node_id, reg1, base1))
951 edac_dbg(0, " DCSB1[%d]=0x%08x reg: 0x%x\n",
954 if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, base0))
955 edac_dbg(0, " DCSB0[%d]=0x%08x reg: F2x%x\n",
961 if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, base1))
962 edac_dbg(0, " DCSB1[%d]=0x%08x reg: F2x%x\n",
963 cs, *base1, (pvt->fam == 0x10) ? reg1
968 for_each_chip_select_mask(cs, 0, pvt) {
969 int reg0 = mask_reg0 + (cs * 4);
970 int reg1 = mask_reg1 + (cs * 4);
971 u32 *mask0 = &pvt->csels[0].csmasks[cs];
972 u32 *mask1 = &pvt->csels[1].csmasks[cs];
975 if (!amd_smn_read(pvt->mc_node_id, reg0, mask0))
976 edac_dbg(0, " DCSM0[%d]=0x%08x reg: 0x%x\n",
979 if (!amd_smn_read(pvt->mc_node_id, reg1, mask1))
980 edac_dbg(0, " DCSM1[%d]=0x%08x reg: 0x%x\n",
983 if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, mask0))
984 edac_dbg(0, " DCSM0[%d]=0x%08x reg: F2x%x\n",
990 if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, mask1))
991 edac_dbg(0, " DCSM1[%d]=0x%08x reg: F2x%x\n",
992 cs, *mask1, (pvt->fam == 0x10) ? reg1
998 static void determine_memory_type(struct amd64_pvt *pvt)
1000 u32 dram_ctrl, dcsm;
1004 if (pvt->ext_model >= K8_REV_F)
1007 pvt->dram_type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
1011 if (pvt->dchr0 & DDR3_MODE)
1014 pvt->dram_type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
1018 if (pvt->model < 0x60)
1022 * Model 0x60h needs special handling:
1024 * We use a Chip Select value of '0' to obtain dcsm.
1025 * Theoretically, it is possible to populate LRDIMMs of different
1026 * 'Rank' value on a DCT. But this is not the common case. So,
1027 * it's reasonable to assume all DIMMs are going to be of same
1028 * 'type' until proven otherwise.
1030 amd64_read_dct_pci_cfg(pvt, 0, DRAM_CONTROL, &dram_ctrl);
1031 dcsm = pvt->csels[0].csmasks[0];
1033 if (((dram_ctrl >> 8) & 0x7) == 0x2)
1034 pvt->dram_type = MEM_DDR4;
1035 else if (pvt->dclr0 & BIT(16))
1036 pvt->dram_type = MEM_DDR3;
1037 else if (dcsm & 0x3)
1038 pvt->dram_type = MEM_LRDDR3;
1040 pvt->dram_type = MEM_RDDR3;
1049 if ((pvt->umc[0].dimm_cfg | pvt->umc[1].dimm_cfg) & BIT(5))
1050 pvt->dram_type = MEM_LRDDR4;
1051 else if ((pvt->umc[0].dimm_cfg | pvt->umc[1].dimm_cfg) & BIT(4))
1052 pvt->dram_type = MEM_RDDR4;
1054 pvt->dram_type = MEM_DDR4;
1058 WARN(1, KERN_ERR "%s: Family??? 0x%x\n", __func__, pvt->fam);
1059 pvt->dram_type = MEM_EMPTY;
1064 pvt->dram_type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
1067 /* Get the number of DCT channels the memory controller is using. */
1068 static int k8_early_channel_count(struct amd64_pvt *pvt)
1072 if (pvt->ext_model >= K8_REV_F)
1073 /* RevF (NPT) and later */
1074 flag = pvt->dclr0 & WIDTH_128;
1076 /* RevE and earlier */
1077 flag = pvt->dclr0 & REVE_WIDTH_128;
1082 return (flag) ? 2 : 1;
1085 /* On F10h and later ErrAddr is MC4_ADDR[47:1] */
1086 static u64 get_error_address(struct amd64_pvt *pvt, struct mce *m)
1088 u16 mce_nid = amd_get_nb_id(m->extcpu);
1089 struct mem_ctl_info *mci;
1094 mci = edac_mc_find(mce_nid);
1098 pvt = mci->pvt_info;
1100 if (pvt->fam == 0xf) {
1105 addr = m->addr & GENMASK_ULL(end_bit, start_bit);
1108 * Erratum 637 workaround
1110 if (pvt->fam == 0x15) {
1111 u64 cc6_base, tmp_addr;
1115 if ((addr & GENMASK_ULL(47, 24)) >> 24 != 0x00fdf7)
1119 amd64_read_pci_cfg(pvt->F1, DRAM_LOCAL_NODE_LIM, &tmp);
1120 intlv_en = tmp >> 21 & 0x7;
1122 /* add [47:27] + 3 trailing bits */
1123 cc6_base = (tmp & GENMASK_ULL(20, 0)) << 3;
1125 /* reverse and add DramIntlvEn */
1126 cc6_base |= intlv_en ^ 0x7;
1128 /* pin at [47:24] */
1132 return cc6_base | (addr & GENMASK_ULL(23, 0));
1134 amd64_read_pci_cfg(pvt->F1, DRAM_LOCAL_NODE_BASE, &tmp);
1137 tmp_addr = (addr & GENMASK_ULL(23, 12)) << __fls(intlv_en + 1);
1139 /* OR DramIntlvSel into bits [14:12] */
1140 tmp_addr |= (tmp & GENMASK_ULL(23, 21)) >> 9;
1142 /* add remaining [11:0] bits from original MC4_ADDR */
1143 tmp_addr |= addr & GENMASK_ULL(11, 0);
1145 return cc6_base | tmp_addr;
1151 static struct pci_dev *pci_get_related_function(unsigned int vendor,
1152 unsigned int device,
1153 struct pci_dev *related)
1155 struct pci_dev *dev = NULL;
1157 while ((dev = pci_get_device(vendor, device, dev))) {
1158 if (pci_domain_nr(dev->bus) == pci_domain_nr(related->bus) &&
1159 (dev->bus->number == related->bus->number) &&
1160 (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
1167 static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
1169 struct amd_northbridge *nb;
1170 struct pci_dev *f1 = NULL;
1171 unsigned int pci_func;
1172 int off = range << 3;
1175 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off, &pvt->ranges[range].base.lo);
1176 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off, &pvt->ranges[range].lim.lo);
1178 if (pvt->fam == 0xf)
1181 if (!dram_rw(pvt, range))
1184 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off, &pvt->ranges[range].base.hi);
1185 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off, &pvt->ranges[range].lim.hi);
1187 /* F15h: factor in CC6 save area by reading dst node's limit reg */
1188 if (pvt->fam != 0x15)
1191 nb = node_to_amd_nb(dram_dst_node(pvt, range));
1195 if (pvt->model == 0x60)
1196 pci_func = PCI_DEVICE_ID_AMD_15H_M60H_NB_F1;
1197 else if (pvt->model == 0x30)
1198 pci_func = PCI_DEVICE_ID_AMD_15H_M30H_NB_F1;
1200 pci_func = PCI_DEVICE_ID_AMD_15H_NB_F1;
1202 f1 = pci_get_related_function(nb->misc->vendor, pci_func, nb->misc);
1206 amd64_read_pci_cfg(f1, DRAM_LOCAL_NODE_LIM, &llim);
1208 pvt->ranges[range].lim.lo &= GENMASK_ULL(15, 0);
1210 /* {[39:27],111b} */
1211 pvt->ranges[range].lim.lo |= ((llim & 0x1fff) << 3 | 0x7) << 16;
1213 pvt->ranges[range].lim.hi &= GENMASK_ULL(7, 0);
1216 pvt->ranges[range].lim.hi |= llim >> 13;
1221 static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
1222 struct err_info *err)
1224 struct amd64_pvt *pvt = mci->pvt_info;
1226 error_address_to_page_and_offset(sys_addr, err);
1229 * Find out which node the error address belongs to. This may be
1230 * different from the node that detected the error.
1232 err->src_mci = find_mc_by_sys_addr(mci, sys_addr);
1233 if (!err->src_mci) {
1234 amd64_mc_err(mci, "failed to map error addr 0x%lx to a node\n",
1235 (unsigned long)sys_addr);
1236 err->err_code = ERR_NODE;
1240 /* Now map the sys_addr to a CSROW */
1241 err->csrow = sys_addr_to_csrow(err->src_mci, sys_addr);
1242 if (err->csrow < 0) {
1243 err->err_code = ERR_CSROW;
1247 /* CHIPKILL enabled */
1248 if (pvt->nbcfg & NBCFG_CHIPKILL) {
1249 err->channel = get_channel_from_ecc_syndrome(mci, err->syndrome);
1250 if (err->channel < 0) {
1252 * Syndrome didn't map, so we don't know which of the
1253 * 2 DIMMs is in error. So we need to ID 'both' of them
1256 amd64_mc_warn(err->src_mci, "unknown syndrome 0x%04x - "
1257 "possible error reporting race\n",
1259 err->err_code = ERR_CHANNEL;
1264 * non-chipkill ecc mode
1266 * The k8 documentation is unclear about how to determine the
1267 * channel number when using non-chipkill memory. This method
1268 * was obtained from email communication with someone at AMD.
1269 * (Wish the email was placed in this comment - norsk)
1271 err->channel = ((sys_addr & BIT(3)) != 0);
1275 static int ddr2_cs_size(unsigned i, bool dct_width)
1281 else if (!(i & 0x1))
1284 shift = (i + 1) >> 1;
1286 return 128 << (shift + !!dct_width);
1289 static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1290 unsigned cs_mode, int cs_mask_nr)
1292 u32 dclr = dct ? pvt->dclr1 : pvt->dclr0;
1294 if (pvt->ext_model >= K8_REV_F) {
1295 WARN_ON(cs_mode > 11);
1296 return ddr2_cs_size(cs_mode, dclr & WIDTH_128);
1298 else if (pvt->ext_model >= K8_REV_D) {
1300 WARN_ON(cs_mode > 10);
1303 * the below calculation, besides trying to win an obfuscated C
1304 * contest, maps cs_mode values to DIMM chip select sizes. The
1307 * cs_mode CS size (mb)
1308 * ======= ============
1321 * Basically, it calculates a value with which to shift the
1322 * smallest CS size of 32MB.
1324 * ddr[23]_cs_size have a similar purpose.
1326 diff = cs_mode/3 + (unsigned)(cs_mode > 5);
1328 return 32 << (cs_mode - diff);
1331 WARN_ON(cs_mode > 6);
1332 return 32 << cs_mode;
1337 * Get the number of DCT channels in use.
1340 * number of Memory Channels in operation
1342 * contents of the DCL0_LOW register
1344 static int f1x_early_channel_count(struct amd64_pvt *pvt)
1346 int i, j, channels = 0;
1348 /* On F10h, if we are in 128 bit mode, then we are using 2 channels */
1349 if (pvt->fam == 0x10 && (pvt->dclr0 & WIDTH_128))
1353 * Need to check if in unganged mode: In such, there are 2 channels,
1354 * but they are not in 128 bit mode and thus the above 'dclr0' status
1357 * Need to check DCT0[0] and DCT1[0] to see if only one of them has
1358 * their CSEnable bit on. If so, then SINGLE DIMM case.
1360 edac_dbg(0, "Data width is not 128 bits - need more decoding\n");
1363 * Check DRAM Bank Address Mapping values for each DIMM to see if there
1364 * is more than just one DIMM present in unganged mode. Need to check
1365 * both controllers since DIMMs can be placed in either one.
1367 for (i = 0; i < 2; i++) {
1368 u32 dbam = (i ? pvt->dbam1 : pvt->dbam0);
1370 for (j = 0; j < 4; j++) {
1371 if (DBAM_DIMM(j, dbam) > 0) {
1381 amd64_info("MCT channel count: %d\n", channels);
1386 static int f17_early_channel_count(struct amd64_pvt *pvt)
1388 int i, channels = 0;
1390 /* SDP Control bit 31 (SdpInit) is clear for unused UMC channels */
1391 for (i = 0; i < NUM_UMCS; i++)
1392 channels += !!(pvt->umc[i].sdp_ctrl & UMC_SDP_INIT);
1394 amd64_info("MCT channel count: %d\n", channels);
1399 static int ddr3_cs_size(unsigned i, bool dct_width)
1404 if (i == 0 || i == 3 || i == 4)
1410 else if (!(i & 0x1))
1413 shift = (i + 1) >> 1;
1416 cs_size = (128 * (1 << !!dct_width)) << shift;
1421 static int ddr3_lrdimm_cs_size(unsigned i, unsigned rank_multiply)
1426 if (i < 4 || i == 6)
1430 else if (!(i & 0x1))
1433 shift = (i + 1) >> 1;
1436 cs_size = rank_multiply * (128 << shift);
1441 static int ddr4_cs_size(unsigned i)
1450 /* Min cs_size = 1G */
1451 cs_size = 1024 * (1 << (i >> 1));
1456 static int f10_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1457 unsigned cs_mode, int cs_mask_nr)
1459 u32 dclr = dct ? pvt->dclr1 : pvt->dclr0;
1461 WARN_ON(cs_mode > 11);
1463 if (pvt->dchr0 & DDR3_MODE || pvt->dchr1 & DDR3_MODE)
1464 return ddr3_cs_size(cs_mode, dclr & WIDTH_128);
1466 return ddr2_cs_size(cs_mode, dclr & WIDTH_128);
1470 * F15h supports only 64bit DCT interfaces
1472 static int f15_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1473 unsigned cs_mode, int cs_mask_nr)
1475 WARN_ON(cs_mode > 12);
1477 return ddr3_cs_size(cs_mode, false);
1480 /* F15h M60h supports DDR4 mapping as well.. */
1481 static int f15_m60h_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1482 unsigned cs_mode, int cs_mask_nr)
1485 u32 dcsm = pvt->csels[dct].csmasks[cs_mask_nr];
1487 WARN_ON(cs_mode > 12);
1489 if (pvt->dram_type == MEM_DDR4) {
1493 cs_size = ddr4_cs_size(cs_mode);
1494 } else if (pvt->dram_type == MEM_LRDDR3) {
1495 unsigned rank_multiply = dcsm & 0xf;
1497 if (rank_multiply == 3)
1499 cs_size = ddr3_lrdimm_cs_size(cs_mode, rank_multiply);
1501 /* Minimum cs size is 512mb for F15hM60h*/
1505 cs_size = ddr3_cs_size(cs_mode, false);
1512 * F16h and F15h model 30h have only limited cs_modes.
1514 static int f16_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1515 unsigned cs_mode, int cs_mask_nr)
1517 WARN_ON(cs_mode > 12);
1519 if (cs_mode == 6 || cs_mode == 8 ||
1520 cs_mode == 9 || cs_mode == 12)
1523 return ddr3_cs_size(cs_mode, false);
1526 static int f17_base_addr_to_cs_size(struct amd64_pvt *pvt, u8 umc,
1527 unsigned int cs_mode, int csrow_nr)
1529 u32 base_addr = pvt->csels[umc].csbases[csrow_nr];
1531 /* Each mask is used for every two base addresses. */
1532 u32 addr_mask = pvt->csels[umc].csmasks[csrow_nr >> 1];
1534 /* Register [31:1] = Address [39:9]. Size is in kBs here. */
1535 u32 size = ((addr_mask >> 1) - (base_addr >> 1) + 1) >> 1;
1537 edac_dbg(1, "BaseAddr: 0x%x, AddrMask: 0x%x\n", base_addr, addr_mask);
1539 /* Return size in MBs. */
1543 static void read_dram_ctl_register(struct amd64_pvt *pvt)
1546 if (pvt->fam == 0xf)
1549 if (!amd64_read_pci_cfg(pvt->F2, DCT_SEL_LO, &pvt->dct_sel_lo)) {
1550 edac_dbg(0, "F2x110 (DCTSelLow): 0x%08x, High range addrs at: 0x%x\n",
1551 pvt->dct_sel_lo, dct_sel_baseaddr(pvt));
1553 edac_dbg(0, " DCTs operate in %s mode\n",
1554 (dct_ganging_enabled(pvt) ? "ganged" : "unganged"));
1556 if (!dct_ganging_enabled(pvt))
1557 edac_dbg(0, " Address range split per DCT: %s\n",
1558 (dct_high_range_enabled(pvt) ? "yes" : "no"));
1560 edac_dbg(0, " data interleave for ECC: %s, DRAM cleared since last warm reset: %s\n",
1561 (dct_data_intlv_enabled(pvt) ? "enabled" : "disabled"),
1562 (dct_memory_cleared(pvt) ? "yes" : "no"));
1564 edac_dbg(0, " channel interleave: %s, "
1565 "interleave bits selector: 0x%x\n",
1566 (dct_interleave_enabled(pvt) ? "enabled" : "disabled"),
1567 dct_sel_interleave_addr(pvt));
1570 amd64_read_pci_cfg(pvt->F2, DCT_SEL_HI, &pvt->dct_sel_hi);
1574 * Determine channel (DCT) based on the interleaving mode (see F15h M30h BKDG,
1575 * 2.10.12 Memory Interleaving Modes).
1577 static u8 f15_m30h_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
1578 u8 intlv_en, int num_dcts_intlv,
1585 return (u8)(dct_sel);
1587 if (num_dcts_intlv == 2) {
1588 select = (sys_addr >> 8) & 0x3;
1589 channel = select ? 0x3 : 0;
1590 } else if (num_dcts_intlv == 4) {
1591 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1592 switch (intlv_addr) {
1594 channel = (sys_addr >> 8) & 0x3;
1597 channel = (sys_addr >> 9) & 0x3;
1605 * Determine channel (DCT) based on the interleaving mode: F10h BKDG, 2.8.9 Memory
1606 * Interleaving Modes.
1608 static u8 f1x_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
1609 bool hi_range_sel, u8 intlv_en)
1611 u8 dct_sel_high = (pvt->dct_sel_lo >> 1) & 1;
1613 if (dct_ganging_enabled(pvt))
1617 return dct_sel_high;
1620 * see F2x110[DctSelIntLvAddr] - channel interleave mode
1622 if (dct_interleave_enabled(pvt)) {
1623 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1625 /* return DCT select function: 0=DCT0, 1=DCT1 */
1627 return sys_addr >> 6 & 1;
1629 if (intlv_addr & 0x2) {
1630 u8 shift = intlv_addr & 0x1 ? 9 : 6;
1631 u32 temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) & 1;
1633 return ((sys_addr >> shift) & 1) ^ temp;
1636 if (intlv_addr & 0x4) {
1637 u8 shift = intlv_addr & 0x1 ? 9 : 8;
1639 return (sys_addr >> shift) & 1;
1642 return (sys_addr >> (12 + hweight8(intlv_en))) & 1;
1645 if (dct_high_range_enabled(pvt))
1646 return ~dct_sel_high & 1;
1651 /* Convert the sys_addr to the normalized DCT address */
1652 static u64 f1x_get_norm_dct_addr(struct amd64_pvt *pvt, u8 range,
1653 u64 sys_addr, bool hi_rng,
1654 u32 dct_sel_base_addr)
1657 u64 dram_base = get_dram_base(pvt, range);
1658 u64 hole_off = f10_dhar_offset(pvt);
1659 u64 dct_sel_base_off = (u64)(pvt->dct_sel_hi & 0xFFFFFC00) << 16;
1664 * base address of high range is below 4Gb
1665 * (bits [47:27] at [31:11])
1666 * DRAM address space on this DCT is hoisted above 4Gb &&
1669 * remove hole offset from sys_addr
1671 * remove high range offset from sys_addr
1673 if ((!(dct_sel_base_addr >> 16) ||
1674 dct_sel_base_addr < dhar_base(pvt)) &&
1676 (sys_addr >= BIT_64(32)))
1677 chan_off = hole_off;
1679 chan_off = dct_sel_base_off;
1683 * we have a valid hole &&
1688 * remove dram base to normalize to DCT address
1690 if (dhar_valid(pvt) && (sys_addr >= BIT_64(32)))
1691 chan_off = hole_off;
1693 chan_off = dram_base;
1696 return (sys_addr & GENMASK_ULL(47,6)) - (chan_off & GENMASK_ULL(47,23));
1700 * checks if the csrow passed in is marked as SPARED, if so returns the new
1703 static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
1707 if (online_spare_swap_done(pvt, dct) &&
1708 csrow == online_spare_bad_dramcs(pvt, dct)) {
1710 for_each_chip_select(tmp_cs, dct, pvt) {
1711 if (chip_select_base(tmp_cs, dct, pvt) & 0x2) {
1721 * Iterate over the DRAM DCT "base" and "mask" registers looking for a
1722 * SystemAddr match on the specified 'ChannelSelect' and 'NodeID'
1725 * -EINVAL: NOT FOUND
1726 * 0..csrow = Chip-Select Row
1728 static int f1x_lookup_addr_in_dct(u64 in_addr, u8 nid, u8 dct)
1730 struct mem_ctl_info *mci;
1731 struct amd64_pvt *pvt;
1732 u64 cs_base, cs_mask;
1733 int cs_found = -EINVAL;
1736 mci = edac_mc_find(nid);
1740 pvt = mci->pvt_info;
1742 edac_dbg(1, "input addr: 0x%llx, DCT: %d\n", in_addr, dct);
1744 for_each_chip_select(csrow, dct, pvt) {
1745 if (!csrow_enabled(csrow, dct, pvt))
1748 get_cs_base_and_mask(pvt, csrow, dct, &cs_base, &cs_mask);
1750 edac_dbg(1, " CSROW=%d CSBase=0x%llx CSMask=0x%llx\n",
1751 csrow, cs_base, cs_mask);
1755 edac_dbg(1, " (InputAddr & ~CSMask)=0x%llx (CSBase & ~CSMask)=0x%llx\n",
1756 (in_addr & cs_mask), (cs_base & cs_mask));
1758 if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
1759 if (pvt->fam == 0x15 && pvt->model >= 0x30) {
1763 cs_found = f10_process_possible_spare(pvt, dct, csrow);
1765 edac_dbg(1, " MATCH csrow=%d\n", cs_found);
1773 * See F2x10C. Non-interleaved graphics framebuffer memory under the 16G is
1774 * swapped with a region located at the bottom of memory so that the GPU can use
1775 * the interleaved region and thus two channels.
1777 static u64 f1x_swap_interleaved_region(struct amd64_pvt *pvt, u64 sys_addr)
1779 u32 swap_reg, swap_base, swap_limit, rgn_size, tmp_addr;
1781 if (pvt->fam == 0x10) {
1782 /* only revC3 and revE have that feature */
1783 if (pvt->model < 4 || (pvt->model < 0xa && pvt->stepping < 3))
1787 amd64_read_pci_cfg(pvt->F2, SWAP_INTLV_REG, &swap_reg);
1789 if (!(swap_reg & 0x1))
1792 swap_base = (swap_reg >> 3) & 0x7f;
1793 swap_limit = (swap_reg >> 11) & 0x7f;
1794 rgn_size = (swap_reg >> 20) & 0x7f;
1795 tmp_addr = sys_addr >> 27;
1797 if (!(sys_addr >> 34) &&
1798 (((tmp_addr >= swap_base) &&
1799 (tmp_addr <= swap_limit)) ||
1800 (tmp_addr < rgn_size)))
1801 return sys_addr ^ (u64)swap_base << 27;
1806 /* For a given @dram_range, check if @sys_addr falls within it. */
1807 static int f1x_match_to_this_node(struct amd64_pvt *pvt, unsigned range,
1808 u64 sys_addr, int *chan_sel)
1810 int cs_found = -EINVAL;
1814 bool high_range = false;
1816 u8 node_id = dram_dst_node(pvt, range);
1817 u8 intlv_en = dram_intlv_en(pvt, range);
1818 u32 intlv_sel = dram_intlv_sel(pvt, range);
1820 edac_dbg(1, "(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
1821 range, sys_addr, get_dram_limit(pvt, range));
1823 if (dhar_valid(pvt) &&
1824 dhar_base(pvt) <= sys_addr &&
1825 sys_addr < BIT_64(32)) {
1826 amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
1831 if (intlv_en && (intlv_sel != ((sys_addr >> 12) & intlv_en)))
1834 sys_addr = f1x_swap_interleaved_region(pvt, sys_addr);
1836 dct_sel_base = dct_sel_baseaddr(pvt);
1839 * check whether addresses >= DctSelBaseAddr[47:27] are to be used to
1840 * select between DCT0 and DCT1.
1842 if (dct_high_range_enabled(pvt) &&
1843 !dct_ganging_enabled(pvt) &&
1844 ((sys_addr >> 27) >= (dct_sel_base >> 11)))
1847 channel = f1x_determine_channel(pvt, sys_addr, high_range, intlv_en);
1849 chan_addr = f1x_get_norm_dct_addr(pvt, range, sys_addr,
1850 high_range, dct_sel_base);
1852 /* Remove node interleaving, see F1x120 */
1854 chan_addr = ((chan_addr >> (12 + hweight8(intlv_en))) << 12) |
1855 (chan_addr & 0xfff);
1857 /* remove channel interleave */
1858 if (dct_interleave_enabled(pvt) &&
1859 !dct_high_range_enabled(pvt) &&
1860 !dct_ganging_enabled(pvt)) {
1862 if (dct_sel_interleave_addr(pvt) != 1) {
1863 if (dct_sel_interleave_addr(pvt) == 0x3)
1865 chan_addr = ((chan_addr >> 10) << 9) |
1866 (chan_addr & 0x1ff);
1868 /* A[6] or hash 6 */
1869 chan_addr = ((chan_addr >> 7) << 6) |
1873 chan_addr = ((chan_addr >> 13) << 12) |
1874 (chan_addr & 0xfff);
1877 edac_dbg(1, " Normalized DCT addr: 0x%llx\n", chan_addr);
1879 cs_found = f1x_lookup_addr_in_dct(chan_addr, node_id, channel);
1882 *chan_sel = channel;
1887 static int f15_m30h_match_to_this_node(struct amd64_pvt *pvt, unsigned range,
1888 u64 sys_addr, int *chan_sel)
1890 int cs_found = -EINVAL;
1891 int num_dcts_intlv = 0;
1892 u64 chan_addr, chan_offset;
1893 u64 dct_base, dct_limit;
1894 u32 dct_cont_base_reg, dct_cont_limit_reg, tmp;
1895 u8 channel, alias_channel, leg_mmio_hole, dct_sel, dct_offset_en;
1897 u64 dhar_offset = f10_dhar_offset(pvt);
1898 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1899 u8 node_id = dram_dst_node(pvt, range);
1900 u8 intlv_en = dram_intlv_en(pvt, range);
1902 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &dct_cont_base_reg);
1903 amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &dct_cont_limit_reg);
1905 dct_offset_en = (u8) ((dct_cont_base_reg >> 3) & BIT(0));
1906 dct_sel = (u8) ((dct_cont_base_reg >> 4) & 0x7);
1908 edac_dbg(1, "(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
1909 range, sys_addr, get_dram_limit(pvt, range));
1911 if (!(get_dram_base(pvt, range) <= sys_addr) &&
1912 !(get_dram_limit(pvt, range) >= sys_addr))
1915 if (dhar_valid(pvt) &&
1916 dhar_base(pvt) <= sys_addr &&
1917 sys_addr < BIT_64(32)) {
1918 amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
1923 /* Verify sys_addr is within DCT Range. */
1924 dct_base = (u64) dct_sel_baseaddr(pvt);
1925 dct_limit = (dct_cont_limit_reg >> 11) & 0x1FFF;
1927 if (!(dct_cont_base_reg & BIT(0)) &&
1928 !(dct_base <= (sys_addr >> 27) &&
1929 dct_limit >= (sys_addr >> 27)))
1932 /* Verify number of dct's that participate in channel interleaving. */
1933 num_dcts_intlv = (int) hweight8(intlv_en);
1935 if (!(num_dcts_intlv % 2 == 0) || (num_dcts_intlv > 4))
1938 if (pvt->model >= 0x60)
1939 channel = f1x_determine_channel(pvt, sys_addr, false, intlv_en);
1941 channel = f15_m30h_determine_channel(pvt, sys_addr, intlv_en,
1942 num_dcts_intlv, dct_sel);
1944 /* Verify we stay within the MAX number of channels allowed */
1948 leg_mmio_hole = (u8) (dct_cont_base_reg >> 1 & BIT(0));
1950 /* Get normalized DCT addr */
1951 if (leg_mmio_hole && (sys_addr >= BIT_64(32)))
1952 chan_offset = dhar_offset;
1954 chan_offset = dct_base << 27;
1956 chan_addr = sys_addr - chan_offset;
1958 /* remove channel interleave */
1959 if (num_dcts_intlv == 2) {
1960 if (intlv_addr == 0x4)
1961 chan_addr = ((chan_addr >> 9) << 8) |
1963 else if (intlv_addr == 0x5)
1964 chan_addr = ((chan_addr >> 10) << 9) |
1965 (chan_addr & 0x1ff);
1969 } else if (num_dcts_intlv == 4) {
1970 if (intlv_addr == 0x4)
1971 chan_addr = ((chan_addr >> 10) << 8) |
1973 else if (intlv_addr == 0x5)
1974 chan_addr = ((chan_addr >> 11) << 9) |
1975 (chan_addr & 0x1ff);
1980 if (dct_offset_en) {
1981 amd64_read_pci_cfg(pvt->F1,
1982 DRAM_CONT_HIGH_OFF + (int) channel * 4,
1984 chan_addr += (u64) ((tmp >> 11) & 0xfff) << 27;
1987 f15h_select_dct(pvt, channel);
1989 edac_dbg(1, " Normalized DCT addr: 0x%llx\n", chan_addr);
1993 * if channel = 3, then alias it to 1. This is because, in F15 M30h,
1994 * there is support for 4 DCT's, but only 2 are currently functional.
1995 * They are DCT0 and DCT3. But we have read all registers of DCT3 into
1996 * pvt->csels[1]. So we need to use '1' here to get correct info.
1997 * Refer F15 M30h BKDG Section 2.10 and 2.10.3 for clarifications.
1999 alias_channel = (channel == 3) ? 1 : channel;
2001 cs_found = f1x_lookup_addr_in_dct(chan_addr, node_id, alias_channel);
2004 *chan_sel = alias_channel;
2009 static int f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt,
2013 int cs_found = -EINVAL;
2016 for (range = 0; range < DRAM_RANGES; range++) {
2017 if (!dram_rw(pvt, range))
2020 if (pvt->fam == 0x15 && pvt->model >= 0x30)
2021 cs_found = f15_m30h_match_to_this_node(pvt, range,
2025 else if ((get_dram_base(pvt, range) <= sys_addr) &&
2026 (get_dram_limit(pvt, range) >= sys_addr)) {
2027 cs_found = f1x_match_to_this_node(pvt, range,
2028 sys_addr, chan_sel);
2037 * For reference see "2.8.5 Routing DRAM Requests" in F10 BKDG. This code maps
2038 * a @sys_addr to NodeID, DCT (channel) and chip select (CSROW).
2040 * The @sys_addr is usually an error address received from the hardware
2043 static void f1x_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
2044 struct err_info *err)
2046 struct amd64_pvt *pvt = mci->pvt_info;
2048 error_address_to_page_and_offset(sys_addr, err);
2050 err->csrow = f1x_translate_sysaddr_to_cs(pvt, sys_addr, &err->channel);
2051 if (err->csrow < 0) {
2052 err->err_code = ERR_CSROW;
2057 * We need the syndromes for channel detection only when we're
2058 * ganged. Otherwise @chan should already contain the channel at
2061 if (dct_ganging_enabled(pvt))
2062 err->channel = get_channel_from_ecc_syndrome(mci, err->syndrome);
2066 * debug routine to display the memory sizes of all logical DIMMs and its
2069 static void debug_display_dimm_sizes(struct amd64_pvt *pvt, u8 ctrl)
2071 int dimm, size0, size1;
2072 u32 *dcsb = ctrl ? pvt->csels[1].csbases : pvt->csels[0].csbases;
2073 u32 dbam = ctrl ? pvt->dbam1 : pvt->dbam0;
2075 if (pvt->fam == 0xf) {
2076 /* K8 families < revF not supported yet */
2077 if (pvt->ext_model < K8_REV_F)
2083 if (pvt->fam == 0x10) {
2084 dbam = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->dbam1
2086 dcsb = (ctrl && !dct_ganging_enabled(pvt)) ?
2087 pvt->csels[1].csbases :
2088 pvt->csels[0].csbases;
2091 dcsb = pvt->csels[1].csbases;
2093 edac_dbg(1, "F2x%d80 (DRAM Bank Address Mapping): 0x%08x\n",
2096 edac_printk(KERN_DEBUG, EDAC_MC, "DCT%d chip selects:\n", ctrl);
2098 /* Dump memory sizes for DIMM and its CSROWs */
2099 for (dimm = 0; dimm < 4; dimm++) {
2102 if (dcsb[dimm*2] & DCSB_CS_ENABLE)
2104 * For F15m60h, we need multiplier for LRDIMM cs_size
2105 * calculation. We pass dimm value to the dbam_to_cs
2106 * mapper so we can find the multiplier from the
2107 * corresponding DCSM.
2109 size0 = pvt->ops->dbam_to_cs(pvt, ctrl,
2110 DBAM_DIMM(dimm, dbam),
2114 if (dcsb[dimm*2 + 1] & DCSB_CS_ENABLE)
2115 size1 = pvt->ops->dbam_to_cs(pvt, ctrl,
2116 DBAM_DIMM(dimm, dbam),
2119 amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
2121 dimm * 2 + 1, size1);
2125 static struct amd64_family_type family_types[] = {
2128 .f1_id = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
2129 .f2_id = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
2131 .early_channel_count = k8_early_channel_count,
2132 .map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
2133 .dbam_to_cs = k8_dbam_to_chip_select,
2138 .f1_id = PCI_DEVICE_ID_AMD_10H_NB_MAP,
2139 .f2_id = PCI_DEVICE_ID_AMD_10H_NB_DRAM,
2141 .early_channel_count = f1x_early_channel_count,
2142 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2143 .dbam_to_cs = f10_dbam_to_chip_select,
2148 .f1_id = PCI_DEVICE_ID_AMD_15H_NB_F1,
2149 .f2_id = PCI_DEVICE_ID_AMD_15H_NB_F2,
2151 .early_channel_count = f1x_early_channel_count,
2152 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2153 .dbam_to_cs = f15_dbam_to_chip_select,
2157 .ctl_name = "F15h_M30h",
2158 .f1_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F1,
2159 .f2_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F2,
2161 .early_channel_count = f1x_early_channel_count,
2162 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2163 .dbam_to_cs = f16_dbam_to_chip_select,
2167 .ctl_name = "F15h_M60h",
2168 .f1_id = PCI_DEVICE_ID_AMD_15H_M60H_NB_F1,
2169 .f2_id = PCI_DEVICE_ID_AMD_15H_M60H_NB_F2,
2171 .early_channel_count = f1x_early_channel_count,
2172 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2173 .dbam_to_cs = f15_m60h_dbam_to_chip_select,
2178 .f1_id = PCI_DEVICE_ID_AMD_16H_NB_F1,
2179 .f2_id = PCI_DEVICE_ID_AMD_16H_NB_F2,
2181 .early_channel_count = f1x_early_channel_count,
2182 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2183 .dbam_to_cs = f16_dbam_to_chip_select,
2187 .ctl_name = "F16h_M30h",
2188 .f1_id = PCI_DEVICE_ID_AMD_16H_M30H_NB_F1,
2189 .f2_id = PCI_DEVICE_ID_AMD_16H_M30H_NB_F2,
2191 .early_channel_count = f1x_early_channel_count,
2192 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
2193 .dbam_to_cs = f16_dbam_to_chip_select,
2198 .f0_id = PCI_DEVICE_ID_AMD_17H_DF_F0,
2199 .f6_id = PCI_DEVICE_ID_AMD_17H_DF_F6,
2201 .early_channel_count = f17_early_channel_count,
2202 .dbam_to_cs = f17_base_addr_to_cs_size,
2206 .ctl_name = "F17h_M10h",
2207 .f0_id = PCI_DEVICE_ID_AMD_17H_M10H_DF_F0,
2208 .f6_id = PCI_DEVICE_ID_AMD_17H_M10H_DF_F6,
2210 .early_channel_count = f17_early_channel_count,
2211 .dbam_to_cs = f17_base_addr_to_cs_size,
2217 * These are tables of eigenvectors (one per line) which can be used for the
2218 * construction of the syndrome tables. The modified syndrome search algorithm
2219 * uses those to find the symbol in error and thus the DIMM.
2221 * Algorithm courtesy of Ross LaFetra from AMD.
2223 static const u16 x4_vectors[] = {
2224 0x2f57, 0x1afe, 0x66cc, 0xdd88,
2225 0x11eb, 0x3396, 0x7f4c, 0xeac8,
2226 0x0001, 0x0002, 0x0004, 0x0008,
2227 0x1013, 0x3032, 0x4044, 0x8088,
2228 0x106b, 0x30d6, 0x70fc, 0xe0a8,
2229 0x4857, 0xc4fe, 0x13cc, 0x3288,
2230 0x1ac5, 0x2f4a, 0x5394, 0xa1e8,
2231 0x1f39, 0x251e, 0xbd6c, 0x6bd8,
2232 0x15c1, 0x2a42, 0x89ac, 0x4758,
2233 0x2b03, 0x1602, 0x4f0c, 0xca08,
2234 0x1f07, 0x3a0e, 0x6b04, 0xbd08,
2235 0x8ba7, 0x465e, 0x244c, 0x1cc8,
2236 0x2b87, 0x164e, 0x642c, 0xdc18,
2237 0x40b9, 0x80de, 0x1094, 0x20e8,
2238 0x27db, 0x1eb6, 0x9dac, 0x7b58,
2239 0x11c1, 0x2242, 0x84ac, 0x4c58,
2240 0x1be5, 0x2d7a, 0x5e34, 0xa718,
2241 0x4b39, 0x8d1e, 0x14b4, 0x28d8,
2242 0x4c97, 0xc87e, 0x11fc, 0x33a8,
2243 0x8e97, 0x497e, 0x2ffc, 0x1aa8,
2244 0x16b3, 0x3d62, 0x4f34, 0x8518,
2245 0x1e2f, 0x391a, 0x5cac, 0xf858,
2246 0x1d9f, 0x3b7a, 0x572c, 0xfe18,
2247 0x15f5, 0x2a5a, 0x5264, 0xa3b8,
2248 0x1dbb, 0x3b66, 0x715c, 0xe3f8,
2249 0x4397, 0xc27e, 0x17fc, 0x3ea8,
2250 0x1617, 0x3d3e, 0x6464, 0xb8b8,
2251 0x23ff, 0x12aa, 0xab6c, 0x56d8,
2252 0x2dfb, 0x1ba6, 0x913c, 0x7328,
2253 0x185d, 0x2ca6, 0x7914, 0x9e28,
2254 0x171b, 0x3e36, 0x7d7c, 0xebe8,
2255 0x4199, 0x82ee, 0x19f4, 0x2e58,
2256 0x4807, 0xc40e, 0x130c, 0x3208,
2257 0x1905, 0x2e0a, 0x5804, 0xac08,
2258 0x213f, 0x132a, 0xadfc, 0x5ba8,
2259 0x19a9, 0x2efe, 0xb5cc, 0x6f88,
2262 static const u16 x8_vectors[] = {
2263 0x0145, 0x028a, 0x2374, 0x43c8, 0xa1f0, 0x0520, 0x0a40, 0x1480,
2264 0x0211, 0x0422, 0x0844, 0x1088, 0x01b0, 0x44e0, 0x23c0, 0xed80,
2265 0x1011, 0x0116, 0x022c, 0x0458, 0x08b0, 0x8c60, 0x2740, 0x4e80,
2266 0x0411, 0x0822, 0x1044, 0x0158, 0x02b0, 0x2360, 0x46c0, 0xab80,
2267 0x0811, 0x1022, 0x012c, 0x0258, 0x04b0, 0x4660, 0x8cc0, 0x2780,
2268 0x2071, 0x40e2, 0xa0c4, 0x0108, 0x0210, 0x0420, 0x0840, 0x1080,
2269 0x4071, 0x80e2, 0x0104, 0x0208, 0x0410, 0x0820, 0x1040, 0x2080,
2270 0x8071, 0x0102, 0x0204, 0x0408, 0x0810, 0x1020, 0x2040, 0x4080,
2271 0x019d, 0x03d6, 0x136c, 0x2198, 0x50b0, 0xb2e0, 0x0740, 0x0e80,
2272 0x0189, 0x03ea, 0x072c, 0x0e58, 0x1cb0, 0x56e0, 0x37c0, 0xf580,
2273 0x01fd, 0x0376, 0x06ec, 0x0bb8, 0x1110, 0x2220, 0x4440, 0x8880,
2274 0x0163, 0x02c6, 0x1104, 0x0758, 0x0eb0, 0x2be0, 0x6140, 0xc280,
2275 0x02fd, 0x01c6, 0x0b5c, 0x1108, 0x07b0, 0x25a0, 0x8840, 0x6180,
2276 0x0801, 0x012e, 0x025c, 0x04b8, 0x1370, 0x26e0, 0x57c0, 0xb580,
2277 0x0401, 0x0802, 0x015c, 0x02b8, 0x22b0, 0x13e0, 0x7140, 0xe280,
2278 0x0201, 0x0402, 0x0804, 0x01b8, 0x11b0, 0x31a0, 0x8040, 0x7180,
2279 0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080,
2280 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
2281 0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000,
2284 static int decode_syndrome(u16 syndrome, const u16 *vectors, unsigned num_vecs,
2287 unsigned int i, err_sym;
2289 for (err_sym = 0; err_sym < num_vecs / v_dim; err_sym++) {
2291 unsigned v_idx = err_sym * v_dim;
2292 unsigned v_end = (err_sym + 1) * v_dim;
2294 /* walk over all 16 bits of the syndrome */
2295 for (i = 1; i < (1U << 16); i <<= 1) {
2297 /* if bit is set in that eigenvector... */
2298 if (v_idx < v_end && vectors[v_idx] & i) {
2299 u16 ev_comp = vectors[v_idx++];
2301 /* ... and bit set in the modified syndrome, */
2311 /* can't get to zero, move to next symbol */
2316 edac_dbg(0, "syndrome(%x) not found\n", syndrome);
2320 static int map_err_sym_to_channel(int err_sym, int sym_size)
2333 return err_sym >> 4;
2339 /* imaginary bits not in a DIMM */
2341 WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
2353 return err_sym >> 3;
2359 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
2361 struct amd64_pvt *pvt = mci->pvt_info;
2364 if (pvt->ecc_sym_sz == 8)
2365 err_sym = decode_syndrome(syndrome, x8_vectors,
2366 ARRAY_SIZE(x8_vectors),
2368 else if (pvt->ecc_sym_sz == 4)
2369 err_sym = decode_syndrome(syndrome, x4_vectors,
2370 ARRAY_SIZE(x4_vectors),
2373 amd64_warn("Illegal syndrome type: %u\n", pvt->ecc_sym_sz);
2377 return map_err_sym_to_channel(err_sym, pvt->ecc_sym_sz);
2380 static void __log_ecc_error(struct mem_ctl_info *mci, struct err_info *err,
2383 enum hw_event_mc_err_type err_type;
2387 err_type = HW_EVENT_ERR_CORRECTED;
2388 else if (ecc_type == 1)
2389 err_type = HW_EVENT_ERR_UNCORRECTED;
2390 else if (ecc_type == 3)
2391 err_type = HW_EVENT_ERR_DEFERRED;
2393 WARN(1, "Something is rotten in the state of Denmark.\n");
2397 switch (err->err_code) {
2402 string = "Failed to map error addr to a node";
2405 string = "Failed to map error addr to a csrow";
2408 string = "Unknown syndrome - possible error reporting race";
2411 string = "MCA_SYND not valid - unknown syndrome and csrow";
2414 string = "Cannot decode normalized address";
2417 string = "WTF error";
2421 edac_mc_handle_error(err_type, mci, 1,
2422 err->page, err->offset, err->syndrome,
2423 err->csrow, err->channel, -1,
2427 static inline void decode_bus_error(int node_id, struct mce *m)
2429 struct mem_ctl_info *mci;
2430 struct amd64_pvt *pvt;
2431 u8 ecc_type = (m->status >> 45) & 0x3;
2432 u8 xec = XEC(m->status, 0x1f);
2433 u16 ec = EC(m->status);
2435 struct err_info err;
2437 mci = edac_mc_find(node_id);
2441 pvt = mci->pvt_info;
2443 /* Bail out early if this was an 'observed' error */
2444 if (PP(ec) == NBSL_PP_OBS)
2447 /* Do only ECC errors */
2448 if (xec && xec != F10_NBSL_EXT_ERR_ECC)
2451 memset(&err, 0, sizeof(err));
2453 sys_addr = get_error_address(pvt, m);
2456 err.syndrome = extract_syndrome(m->status);
2458 pvt->ops->map_sysaddr_to_csrow(mci, sys_addr, &err);
2460 __log_ecc_error(mci, &err, ecc_type);
2464 * To find the UMC channel represented by this bank we need to match on its
2465 * instance_id. The instance_id of a bank is held in the lower 32 bits of its
2468 static int find_umc_channel(struct amd64_pvt *pvt, struct mce *m)
2470 u32 umc_instance_id[] = {0x50f00, 0x150f00};
2471 u32 instance_id = m->ipid & GENMASK(31, 0);
2472 int i, channel = -1;
2474 for (i = 0; i < ARRAY_SIZE(umc_instance_id); i++)
2475 if (umc_instance_id[i] == instance_id)
2481 static void decode_umc_error(int node_id, struct mce *m)
2483 u8 ecc_type = (m->status >> 45) & 0x3;
2484 struct mem_ctl_info *mci;
2485 struct amd64_pvt *pvt;
2486 struct err_info err;
2489 mci = edac_mc_find(node_id);
2493 pvt = mci->pvt_info;
2495 memset(&err, 0, sizeof(err));
2497 if (m->status & MCI_STATUS_DEFERRED)
2500 err.channel = find_umc_channel(pvt, m);
2501 if (err.channel < 0) {
2502 err.err_code = ERR_CHANNEL;
2506 if (umc_normaddr_to_sysaddr(m->addr, pvt->mc_node_id, err.channel, &sys_addr)) {
2507 err.err_code = ERR_NORM_ADDR;
2511 error_address_to_page_and_offset(sys_addr, &err);
2513 if (!(m->status & MCI_STATUS_SYNDV)) {
2514 err.err_code = ERR_SYND;
2518 if (ecc_type == 2) {
2519 u8 length = (m->synd >> 18) & 0x3f;
2522 err.syndrome = (m->synd >> 32) & GENMASK(length - 1, 0);
2524 err.err_code = ERR_CHANNEL;
2527 err.csrow = m->synd & 0x7;
2530 __log_ecc_error(mci, &err, ecc_type);
2534 * Use pvt->F3 which contains the F3 CPU PCI device to get the related
2535 * F1 (AddrMap) and F2 (Dct) devices. Return negative value on error.
2536 * Reserve F0 and F6 on systems with a UMC.
2539 reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 pci_id1, u16 pci_id2)
2542 pvt->F0 = pci_get_related_function(pvt->F3->vendor, pci_id1, pvt->F3);
2544 amd64_err("F0 not found, device 0x%x (broken BIOS?)\n", pci_id1);
2548 pvt->F6 = pci_get_related_function(pvt->F3->vendor, pci_id2, pvt->F3);
2550 pci_dev_put(pvt->F0);
2553 amd64_err("F6 not found: device 0x%x (broken BIOS?)\n", pci_id2);
2557 edac_dbg(1, "F0: %s\n", pci_name(pvt->F0));
2558 edac_dbg(1, "F3: %s\n", pci_name(pvt->F3));
2559 edac_dbg(1, "F6: %s\n", pci_name(pvt->F6));
2564 /* Reserve the ADDRESS MAP Device */
2565 pvt->F1 = pci_get_related_function(pvt->F3->vendor, pci_id1, pvt->F3);
2567 amd64_err("F1 not found: device 0x%x (broken BIOS?)\n", pci_id1);
2571 /* Reserve the DCT Device */
2572 pvt->F2 = pci_get_related_function(pvt->F3->vendor, pci_id2, pvt->F3);
2574 pci_dev_put(pvt->F1);
2577 amd64_err("F2 not found: device 0x%x (broken BIOS?)\n", pci_id2);
2581 edac_dbg(1, "F1: %s\n", pci_name(pvt->F1));
2582 edac_dbg(1, "F2: %s\n", pci_name(pvt->F2));
2583 edac_dbg(1, "F3: %s\n", pci_name(pvt->F3));
2588 static void free_mc_sibling_devs(struct amd64_pvt *pvt)
2591 pci_dev_put(pvt->F0);
2592 pci_dev_put(pvt->F6);
2594 pci_dev_put(pvt->F1);
2595 pci_dev_put(pvt->F2);
2599 static void determine_ecc_sym_sz(struct amd64_pvt *pvt)
2601 pvt->ecc_sym_sz = 4;
2606 for (i = 0; i < NUM_UMCS; i++) {
2607 /* Check enabled channels only: */
2608 if ((pvt->umc[i].sdp_ctrl & UMC_SDP_INIT) &&
2609 (pvt->umc[i].ecc_ctrl & BIT(7))) {
2610 pvt->ecc_sym_sz = 8;
2618 if (pvt->fam >= 0x10) {
2621 amd64_read_pci_cfg(pvt->F3, EXT_NB_MCA_CFG, &tmp);
2622 /* F16h has only DCT0, so no need to read dbam1. */
2623 if (pvt->fam != 0x16)
2624 amd64_read_dct_pci_cfg(pvt, 1, DBAM0, &pvt->dbam1);
2626 /* F10h, revD and later can do x8 ECC too. */
2627 if ((pvt->fam > 0x10 || pvt->model > 7) && tmp & BIT(25))
2628 pvt->ecc_sym_sz = 8;
2633 * Retrieve the hardware registers of the memory controller.
2635 static void __read_mc_regs_df(struct amd64_pvt *pvt)
2637 u8 nid = pvt->mc_node_id;
2638 struct amd64_umc *umc;
2641 /* Read registers from each UMC */
2642 for (i = 0; i < NUM_UMCS; i++) {
2644 umc_base = get_umc_base(i);
2647 amd_smn_read(nid, umc_base + UMCCH_DIMM_CFG, &umc->dimm_cfg);
2648 amd_smn_read(nid, umc_base + UMCCH_UMC_CFG, &umc->umc_cfg);
2649 amd_smn_read(nid, umc_base + UMCCH_SDP_CTRL, &umc->sdp_ctrl);
2650 amd_smn_read(nid, umc_base + UMCCH_ECC_CTRL, &umc->ecc_ctrl);
2651 amd_smn_read(nid, umc_base + UMCCH_UMC_CAP_HI, &umc->umc_cap_hi);
2656 * Retrieve the hardware registers of the memory controller (this includes the
2657 * 'Address Map' and 'Misc' device regs)
2659 static void read_mc_regs(struct amd64_pvt *pvt)
2665 * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since
2666 * those are Read-As-Zero.
2668 rdmsrl(MSR_K8_TOP_MEM1, pvt->top_mem);
2669 edac_dbg(0, " TOP_MEM: 0x%016llx\n", pvt->top_mem);
2671 /* Check first whether TOP_MEM2 is enabled: */
2672 rdmsrl(MSR_K8_SYSCFG, msr_val);
2673 if (msr_val & BIT(21)) {
2674 rdmsrl(MSR_K8_TOP_MEM2, pvt->top_mem2);
2675 edac_dbg(0, " TOP_MEM2: 0x%016llx\n", pvt->top_mem2);
2677 edac_dbg(0, " TOP_MEM2 disabled\n");
2681 __read_mc_regs_df(pvt);
2682 amd64_read_pci_cfg(pvt->F0, DF_DHAR, &pvt->dhar);
2687 amd64_read_pci_cfg(pvt->F3, NBCAP, &pvt->nbcap);
2689 read_dram_ctl_register(pvt);
2691 for (range = 0; range < DRAM_RANGES; range++) {
2694 /* read settings for this DRAM range */
2695 read_dram_base_limit_regs(pvt, range);
2697 rw = dram_rw(pvt, range);
2701 edac_dbg(1, " DRAM range[%d], base: 0x%016llx; limit: 0x%016llx\n",
2703 get_dram_base(pvt, range),
2704 get_dram_limit(pvt, range));
2706 edac_dbg(1, " IntlvEn=%s; Range access: %s%s IntlvSel=%d DstNode=%d\n",
2707 dram_intlv_en(pvt, range) ? "Enabled" : "Disabled",
2708 (rw & 0x1) ? "R" : "-",
2709 (rw & 0x2) ? "W" : "-",
2710 dram_intlv_sel(pvt, range),
2711 dram_dst_node(pvt, range));
2714 amd64_read_pci_cfg(pvt->F1, DHAR, &pvt->dhar);
2715 amd64_read_dct_pci_cfg(pvt, 0, DBAM0, &pvt->dbam0);
2717 amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
2719 amd64_read_dct_pci_cfg(pvt, 0, DCLR0, &pvt->dclr0);
2720 amd64_read_dct_pci_cfg(pvt, 0, DCHR0, &pvt->dchr0);
2722 if (!dct_ganging_enabled(pvt)) {
2723 amd64_read_dct_pci_cfg(pvt, 1, DCLR0, &pvt->dclr1);
2724 amd64_read_dct_pci_cfg(pvt, 1, DCHR0, &pvt->dchr1);
2728 read_dct_base_mask(pvt);
2730 determine_memory_type(pvt);
2731 edac_dbg(1, " DIMM type: %s\n", edac_mem_types[pvt->dram_type]);
2733 determine_ecc_sym_sz(pvt);
2735 dump_misc_regs(pvt);
2739 * NOTE: CPU Revision Dependent code
2742 * @csrow_nr ChipSelect Row Number (0..NUM_CHIPSELECTS-1)
2743 * k8 private pointer to -->
2744 * DRAM Bank Address mapping register
2746 * DCL register where dual_channel_active is
2748 * The DBAM register consists of 4 sets of 4 bits each definitions:
2751 * 0-3 CSROWs 0 and 1
2752 * 4-7 CSROWs 2 and 3
2753 * 8-11 CSROWs 4 and 5
2754 * 12-15 CSROWs 6 and 7
2756 * Values range from: 0 to 15
2757 * The meaning of the values depends on CPU revision and dual-channel state,
2758 * see relevant BKDG more info.
2760 * The memory controller provides for total of only 8 CSROWs in its current
2761 * architecture. Each "pair" of CSROWs normally represents just one DIMM in
2762 * single channel or two (2) DIMMs in dual channel mode.
2764 * The following code logic collapses the various tables for CSROW based on CPU
2768 * The number of PAGE_SIZE pages on the specified CSROW number it
2772 static u32 get_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr_orig)
2774 u32 dbam = dct ? pvt->dbam1 : pvt->dbam0;
2775 int csrow_nr = csrow_nr_orig;
2776 u32 cs_mode, nr_pages;
2781 cs_mode = DBAM_DIMM(csrow_nr, dbam);
2783 nr_pages = pvt->ops->dbam_to_cs(pvt, dct, cs_mode, csrow_nr);
2784 nr_pages <<= 20 - PAGE_SHIFT;
2786 edac_dbg(0, "csrow: %d, channel: %d, DBAM idx: %d\n",
2787 csrow_nr_orig, dct, cs_mode);
2788 edac_dbg(0, "nr_pages/channel: %u\n", nr_pages);
2794 * Initialize the array of csrow attribute instances, based on the values
2795 * from pci config hardware registers.
2797 static int init_csrows(struct mem_ctl_info *mci)
2799 struct amd64_pvt *pvt = mci->pvt_info;
2800 enum edac_type edac_mode = EDAC_NONE;
2801 struct csrow_info *csrow;
2802 struct dimm_info *dimm;
2803 int i, j, empty = 1;
2808 amd64_read_pci_cfg(pvt->F3, NBCFG, &val);
2812 edac_dbg(0, "node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2813 pvt->mc_node_id, val,
2814 !!(val & NBCFG_CHIPKILL), !!(val & NBCFG_ECC_ENABLE));
2818 * We iterate over DCT0 here but we look at DCT1 in parallel, if needed.
2820 for_each_chip_select(i, 0, pvt) {
2821 bool row_dct0 = !!csrow_enabled(i, 0, pvt);
2822 bool row_dct1 = false;
2824 if (pvt->fam != 0xf)
2825 row_dct1 = !!csrow_enabled(i, 1, pvt);
2827 if (!row_dct0 && !row_dct1)
2830 csrow = mci->csrows[i];
2833 edac_dbg(1, "MC node: %d, csrow: %d\n",
2834 pvt->mc_node_id, i);
2837 nr_pages = get_csrow_nr_pages(pvt, 0, i);
2838 csrow->channels[0]->dimm->nr_pages = nr_pages;
2841 /* K8 has only one DCT */
2842 if (pvt->fam != 0xf && row_dct1) {
2843 int row_dct1_pages = get_csrow_nr_pages(pvt, 1, i);
2845 csrow->channels[1]->dimm->nr_pages = row_dct1_pages;
2846 nr_pages += row_dct1_pages;
2849 edac_dbg(1, "Total csrow%d pages: %u\n", i, nr_pages);
2851 /* Determine DIMM ECC mode: */
2853 if (mci->edac_ctl_cap & EDAC_FLAG_S4ECD4ED)
2854 edac_mode = EDAC_S4ECD4ED;
2855 else if (mci->edac_ctl_cap & EDAC_FLAG_SECDED)
2856 edac_mode = EDAC_SECDED;
2858 } else if (pvt->nbcfg & NBCFG_ECC_ENABLE) {
2859 edac_mode = (pvt->nbcfg & NBCFG_CHIPKILL)
2864 for (j = 0; j < pvt->channel_count; j++) {
2865 dimm = csrow->channels[j]->dimm;
2866 dimm->mtype = pvt->dram_type;
2867 dimm->edac_mode = edac_mode;
2874 /* get all cores on this DCT */
2875 static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, u16 nid)
2879 for_each_online_cpu(cpu)
2880 if (amd_get_nb_id(cpu) == nid)
2881 cpumask_set_cpu(cpu, mask);
2884 /* check MCG_CTL on all the cpus on this node */
2885 static bool nb_mce_bank_enabled_on_node(u16 nid)
2891 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
2892 amd64_warn("%s: Error allocating mask\n", __func__);
2896 get_cpus_on_this_dct_cpumask(mask, nid);
2898 rdmsr_on_cpus(mask, MSR_IA32_MCG_CTL, msrs);
2900 for_each_cpu(cpu, mask) {
2901 struct msr *reg = per_cpu_ptr(msrs, cpu);
2902 nbe = reg->l & MSR_MCGCTL_NBE;
2904 edac_dbg(0, "core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
2906 (nbe ? "enabled" : "disabled"));
2914 free_cpumask_var(mask);
2918 static int toggle_ecc_err_reporting(struct ecc_settings *s, u16 nid, bool on)
2920 cpumask_var_t cmask;
2923 if (!zalloc_cpumask_var(&cmask, GFP_KERNEL)) {
2924 amd64_warn("%s: error allocating mask\n", __func__);
2928 get_cpus_on_this_dct_cpumask(cmask, nid);
2930 rdmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2932 for_each_cpu(cpu, cmask) {
2934 struct msr *reg = per_cpu_ptr(msrs, cpu);
2937 if (reg->l & MSR_MCGCTL_NBE)
2938 s->flags.nb_mce_enable = 1;
2940 reg->l |= MSR_MCGCTL_NBE;
2943 * Turn off NB MCE reporting only when it was off before
2945 if (!s->flags.nb_mce_enable)
2946 reg->l &= ~MSR_MCGCTL_NBE;
2949 wrmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2951 free_cpumask_var(cmask);
2956 static bool enable_ecc_error_reporting(struct ecc_settings *s, u16 nid,
2960 u32 value, mask = 0x3; /* UECC/CECC enable */
2962 if (toggle_ecc_err_reporting(s, nid, ON)) {
2963 amd64_warn("Error enabling ECC reporting over MCGCTL!\n");
2967 amd64_read_pci_cfg(F3, NBCTL, &value);
2969 s->old_nbctl = value & mask;
2970 s->nbctl_valid = true;
2973 amd64_write_pci_cfg(F3, NBCTL, value);
2975 amd64_read_pci_cfg(F3, NBCFG, &value);
2977 edac_dbg(0, "1: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
2978 nid, value, !!(value & NBCFG_ECC_ENABLE));
2980 if (!(value & NBCFG_ECC_ENABLE)) {
2981 amd64_warn("DRAM ECC disabled on this node, enabling...\n");
2983 s->flags.nb_ecc_prev = 0;
2985 /* Attempt to turn on DRAM ECC Enable */
2986 value |= NBCFG_ECC_ENABLE;
2987 amd64_write_pci_cfg(F3, NBCFG, value);
2989 amd64_read_pci_cfg(F3, NBCFG, &value);
2991 if (!(value & NBCFG_ECC_ENABLE)) {
2992 amd64_warn("Hardware rejected DRAM ECC enable,"
2993 "check memory DIMM configuration.\n");
2996 amd64_info("Hardware accepted DRAM ECC Enable\n");
2999 s->flags.nb_ecc_prev = 1;
3002 edac_dbg(0, "2: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
3003 nid, value, !!(value & NBCFG_ECC_ENABLE));
3008 static void restore_ecc_error_reporting(struct ecc_settings *s, u16 nid,
3011 u32 value, mask = 0x3; /* UECC/CECC enable */
3013 if (!s->nbctl_valid)
3016 amd64_read_pci_cfg(F3, NBCTL, &value);
3018 value |= s->old_nbctl;
3020 amd64_write_pci_cfg(F3, NBCTL, value);
3022 /* restore previous BIOS DRAM ECC "off" setting we force-enabled */
3023 if (!s->flags.nb_ecc_prev) {
3024 amd64_read_pci_cfg(F3, NBCFG, &value);
3025 value &= ~NBCFG_ECC_ENABLE;
3026 amd64_write_pci_cfg(F3, NBCFG, value);
3029 /* restore the NB Enable MCGCTL bit */
3030 if (toggle_ecc_err_reporting(s, nid, OFF))
3031 amd64_warn("Error restoring NB MCGCTL settings!\n");
3035 * EDAC requires that the BIOS have ECC enabled before
3036 * taking over the processing of ECC errors. A command line
3037 * option allows to force-enable hardware ECC later in
3038 * enable_ecc_error_reporting().
3040 static const char *ecc_msg =
3041 "ECC disabled in the BIOS or no ECC capability, module will not load.\n"
3042 " Either enable ECC checking or force module loading by setting "
3043 "'ecc_enable_override'.\n"
3044 " (Note that use of the override may cause unknown side effects.)\n";
3046 static bool ecc_enabled(struct pci_dev *F3, u16 nid)
3048 bool nb_mce_en = false;
3052 if (boot_cpu_data.x86 >= 0x17) {
3053 u8 umc_en_mask = 0, ecc_en_mask = 0;
3055 for (i = 0; i < NUM_UMCS; i++) {
3056 u32 base = get_umc_base(i);
3058 /* Only check enabled UMCs. */
3059 if (amd_smn_read(nid, base + UMCCH_SDP_CTRL, &value))
3062 if (!(value & UMC_SDP_INIT))
3065 umc_en_mask |= BIT(i);
3067 if (amd_smn_read(nid, base + UMCCH_UMC_CAP_HI, &value))
3070 if (value & UMC_ECC_ENABLED)
3071 ecc_en_mask |= BIT(i);
3074 /* Check whether at least one UMC is enabled: */
3076 ecc_en = umc_en_mask == ecc_en_mask;
3078 edac_dbg(0, "Node %d: No enabled UMCs.\n", nid);
3080 /* Assume UMC MCA banks are enabled. */
3083 amd64_read_pci_cfg(F3, NBCFG, &value);
3085 ecc_en = !!(value & NBCFG_ECC_ENABLE);
3087 nb_mce_en = nb_mce_bank_enabled_on_node(nid);
3089 edac_dbg(0, "NB MCE bank disabled, set MSR 0x%08x[4] on node %d to enable.\n",
3090 MSR_IA32_MCG_CTL, nid);
3093 amd64_info("Node %d: DRAM ECC %s.\n",
3094 nid, (ecc_en ? "enabled" : "disabled"));
3096 if (!ecc_en || !nb_mce_en) {
3097 amd64_info("%s", ecc_msg);
3104 f17h_determine_edac_ctl_cap(struct mem_ctl_info *mci, struct amd64_pvt *pvt)
3106 u8 i, ecc_en = 1, cpk_en = 1;
3108 for (i = 0; i < NUM_UMCS; i++) {
3109 if (pvt->umc[i].sdp_ctrl & UMC_SDP_INIT) {
3110 ecc_en &= !!(pvt->umc[i].umc_cap_hi & UMC_ECC_ENABLED);
3111 cpk_en &= !!(pvt->umc[i].umc_cap_hi & UMC_ECC_CHIPKILL_CAP);
3115 /* Set chipkill only if ECC is enabled: */
3117 mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
3120 mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
3124 static void setup_mci_misc_attrs(struct mem_ctl_info *mci,
3125 struct amd64_family_type *fam)
3127 struct amd64_pvt *pvt = mci->pvt_info;
3129 mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;
3130 mci->edac_ctl_cap = EDAC_FLAG_NONE;
3133 f17h_determine_edac_ctl_cap(mci, pvt);
3135 if (pvt->nbcap & NBCAP_SECDED)
3136 mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
3138 if (pvt->nbcap & NBCAP_CHIPKILL)
3139 mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
3142 mci->edac_cap = determine_edac_cap(pvt);
3143 mci->mod_name = EDAC_MOD_STR;
3144 mci->ctl_name = fam->ctl_name;
3145 mci->dev_name = pci_name(pvt->F3);
3146 mci->ctl_page_to_phys = NULL;
3148 /* memory scrubber interface */
3149 mci->set_sdram_scrub_rate = set_scrub_rate;
3150 mci->get_sdram_scrub_rate = get_scrub_rate;
3154 * returns a pointer to the family descriptor on success, NULL otherwise.
3156 static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
3158 struct amd64_family_type *fam_type = NULL;
3160 pvt->ext_model = boot_cpu_data.x86_model >> 4;
3161 pvt->stepping = boot_cpu_data.x86_stepping;
3162 pvt->model = boot_cpu_data.x86_model;
3163 pvt->fam = boot_cpu_data.x86;
3167 fam_type = &family_types[K8_CPUS];
3168 pvt->ops = &family_types[K8_CPUS].ops;
3172 fam_type = &family_types[F10_CPUS];
3173 pvt->ops = &family_types[F10_CPUS].ops;
3177 if (pvt->model == 0x30) {
3178 fam_type = &family_types[F15_M30H_CPUS];
3179 pvt->ops = &family_types[F15_M30H_CPUS].ops;
3181 } else if (pvt->model == 0x60) {
3182 fam_type = &family_types[F15_M60H_CPUS];
3183 pvt->ops = &family_types[F15_M60H_CPUS].ops;
3187 fam_type = &family_types[F15_CPUS];
3188 pvt->ops = &family_types[F15_CPUS].ops;
3192 if (pvt->model == 0x30) {
3193 fam_type = &family_types[F16_M30H_CPUS];
3194 pvt->ops = &family_types[F16_M30H_CPUS].ops;
3197 fam_type = &family_types[F16_CPUS];
3198 pvt->ops = &family_types[F16_CPUS].ops;
3202 if (pvt->model >= 0x10 && pvt->model <= 0x2f) {
3203 fam_type = &family_types[F17_M10H_CPUS];
3204 pvt->ops = &family_types[F17_M10H_CPUS].ops;
3209 fam_type = &family_types[F17_CPUS];
3210 pvt->ops = &family_types[F17_CPUS].ops;
3212 if (pvt->fam == 0x18)
3213 family_types[F17_CPUS].ctl_name = "F18h";
3217 amd64_err("Unsupported family!\n");
3221 amd64_info("%s %sdetected (node %d).\n", fam_type->ctl_name,
3223 (pvt->ext_model >= K8_REV_F ? "revF or later "
3224 : "revE or earlier ")
3225 : ""), pvt->mc_node_id);
3229 static const struct attribute_group *amd64_edac_attr_groups[] = {
3230 #ifdef CONFIG_EDAC_DEBUG
3231 &amd64_edac_dbg_group,
3233 #ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION
3234 &amd64_edac_inj_group,
3239 static int init_one_instance(unsigned int nid)
3241 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
3242 struct amd64_family_type *fam_type = NULL;
3243 struct mem_ctl_info *mci = NULL;
3244 struct edac_mc_layer layers[2];
3245 struct amd64_pvt *pvt = NULL;
3246 u16 pci_id1, pci_id2;
3250 pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
3254 pvt->mc_node_id = nid;
3258 fam_type = per_family_init(pvt);
3262 if (pvt->fam >= 0x17) {
3263 pvt->umc = kcalloc(NUM_UMCS, sizeof(struct amd64_umc), GFP_KERNEL);
3269 pci_id1 = fam_type->f0_id;
3270 pci_id2 = fam_type->f6_id;
3272 pci_id1 = fam_type->f1_id;
3273 pci_id2 = fam_type->f2_id;
3276 err = reserve_mc_sibling_devs(pvt, pci_id1, pci_id2);
3283 * We need to determine how many memory channels there are. Then use
3284 * that information for calculating the size of the dynamic instance
3285 * tables in the 'mci' structure.
3288 pvt->channel_count = pvt->ops->early_channel_count(pvt);
3289 if (pvt->channel_count < 0)
3293 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
3294 layers[0].size = pvt->csels[0].b_cnt;
3295 layers[0].is_virt_csrow = true;
3296 layers[1].type = EDAC_MC_LAYER_CHANNEL;
3299 * Always allocate two channels since we can have setups with DIMMs on
3300 * only one channel. Also, this simplifies handling later for the price
3301 * of a couple of KBs tops.
3304 layers[1].is_virt_csrow = false;
3306 mci = edac_mc_alloc(nid, ARRAY_SIZE(layers), layers, 0);
3310 mci->pvt_info = pvt;
3311 mci->pdev = &pvt->F3->dev;
3313 setup_mci_misc_attrs(mci, fam_type);
3315 if (init_csrows(mci))
3316 mci->edac_cap = EDAC_FLAG_NONE;
3319 if (edac_mc_add_mc_with_groups(mci, amd64_edac_attr_groups)) {
3320 edac_dbg(1, "failed edac_mc_add_mc()\n");
3330 free_mc_sibling_devs(pvt);
3333 if (pvt->fam >= 0x17)
3343 static int probe_one_instance(unsigned int nid)
3345 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
3346 struct ecc_settings *s;
3350 s = kzalloc(sizeof(struct ecc_settings), GFP_KERNEL);
3356 if (!ecc_enabled(F3, nid)) {
3359 if (!ecc_enable_override)
3362 if (boot_cpu_data.x86 >= 0x17) {
3363 amd64_warn("Forcing ECC on is not recommended on newer systems. Please enable ECC in BIOS.");
3366 amd64_warn("Forcing ECC on!\n");
3368 if (!enable_ecc_error_reporting(s, nid, F3))
3372 ret = init_one_instance(nid);
3374 amd64_err("Error probing instance: %d\n", nid);
3376 if (boot_cpu_data.x86 < 0x17)
3377 restore_ecc_error_reporting(s, nid, F3);
3386 ecc_stngs[nid] = NULL;
3392 static void remove_one_instance(unsigned int nid)
3394 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
3395 struct ecc_settings *s = ecc_stngs[nid];
3396 struct mem_ctl_info *mci;
3397 struct amd64_pvt *pvt;
3399 mci = find_mci_by_dev(&F3->dev);
3402 /* Remove from EDAC CORE tracking list */
3403 mci = edac_mc_del_mc(&F3->dev);
3407 pvt = mci->pvt_info;
3409 restore_ecc_error_reporting(s, nid, F3);
3411 free_mc_sibling_devs(pvt);
3413 kfree(ecc_stngs[nid]);
3414 ecc_stngs[nid] = NULL;
3416 /* Free the EDAC CORE resources */
3417 mci->pvt_info = NULL;
3423 static void setup_pci_device(void)
3425 struct mem_ctl_info *mci;
3426 struct amd64_pvt *pvt;
3431 mci = edac_mc_find(0);
3435 pvt = mci->pvt_info;
3437 pci_ctl = edac_pci_create_generic_ctl(&pvt->F0->dev, EDAC_MOD_STR);
3439 pci_ctl = edac_pci_create_generic_ctl(&pvt->F2->dev, EDAC_MOD_STR);
3441 pr_warn("%s(): Unable to create PCI control\n", __func__);
3442 pr_warn("%s(): PCI error report via EDAC not set\n", __func__);
3446 static const struct x86_cpu_id amd64_cpuids[] = {
3447 { X86_VENDOR_AMD, 0xF, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3448 { X86_VENDOR_AMD, 0x10, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3449 { X86_VENDOR_AMD, 0x15, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3450 { X86_VENDOR_AMD, 0x16, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3451 { X86_VENDOR_AMD, 0x17, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3452 { X86_VENDOR_HYGON, 0x18, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
3455 MODULE_DEVICE_TABLE(x86cpu, amd64_cpuids);
3457 static int __init amd64_edac_init(void)
3463 owner = edac_get_owner();
3464 if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
3467 if (!x86_match_cpu(amd64_cpuids))
3470 if (amd_cache_northbridges() < 0)
3476 ecc_stngs = kcalloc(amd_nb_num(), sizeof(ecc_stngs[0]), GFP_KERNEL);
3480 msrs = msrs_alloc();
3484 for (i = 0; i < amd_nb_num(); i++) {
3485 err = probe_one_instance(i);
3487 /* unwind properly */
3489 remove_one_instance(i);
3495 if (!edac_has_mcs()) {
3500 /* register stuff with EDAC MCE */
3501 if (report_gart_errors)
3502 amd_report_gart_errors(true);
3504 if (boot_cpu_data.x86 >= 0x17)
3505 amd_register_ecc_decoder(decode_umc_error);
3507 amd_register_ecc_decoder(decode_bus_error);
3511 #ifdef CONFIG_X86_32
3512 amd64_err("%s on 32-bit is unsupported. USE AT YOUR OWN RISK!\n", EDAC_MOD_STR);
3515 printk(KERN_INFO "AMD64 EDAC driver v%s\n", EDAC_AMD64_VERSION);
3530 static void __exit amd64_edac_exit(void)
3535 edac_pci_release_generic_ctl(pci_ctl);
3537 /* unregister from EDAC MCE */
3538 amd_report_gart_errors(false);
3540 if (boot_cpu_data.x86 >= 0x17)
3541 amd_unregister_ecc_decoder(decode_umc_error);
3543 amd_unregister_ecc_decoder(decode_bus_error);
3545 for (i = 0; i < amd_nb_num(); i++)
3546 remove_one_instance(i);
3555 module_init(amd64_edac_init);
3556 module_exit(amd64_edac_exit);
3558 MODULE_LICENSE("GPL");
3559 MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "
3560 "Dave Peterson, Thayne Harbaugh");
3561 MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "
3562 EDAC_AMD64_VERSION);
3564 module_param(edac_op_state, int, 0444);
3565 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");