1 #include "amd64_edac.h"
2 #include <asm/amd_nb.h>
4 static struct edac_pci_ctl_info *amd64_ctl_pci;
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 * count successfully initialized driver instances for setup_pci_device()
21 static atomic_t drv_instances = ATOMIC_INIT(0);
23 /* Per-node driver instances */
24 static struct mem_ctl_info **mcis;
25 static struct ecc_settings **ecc_stngs;
28 * Address to DRAM bank mapping: see F2x80 for K8 and F2x[1,0]80 for Fam10 and
31 static int ddr2_dbam_revCG[] = {
41 static int ddr2_dbam_revD[] = {
53 static int ddr2_dbam[] = { [0] = 128,
62 static int ddr3_dbam[] = { [0] = -1,
73 * Valid scrub rates for the K8 hardware memory scrubber. We map the scrubbing
74 * bandwidth to a valid bit pattern. The 'set' operation finds the 'matching-
77 *FIXME: Produce a better mapping/linearisation.
82 u32 scrubval; /* bit pattern for scrub rate */
83 u32 bandwidth; /* bandwidth consumed (bytes/sec) */
85 { 0x01, 1600000000UL},
107 { 0x00, 0UL}, /* scrubbing off */
110 static int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset,
111 u32 *val, const char *func)
115 err = pci_read_config_dword(pdev, offset, val);
117 amd64_warn("%s: error reading F%dx%03x.\n",
118 func, PCI_FUNC(pdev->devfn), offset);
123 int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset,
124 u32 val, const char *func)
128 err = pci_write_config_dword(pdev, offset, val);
130 amd64_warn("%s: error writing to F%dx%03x.\n",
131 func, PCI_FUNC(pdev->devfn), offset);
138 * Depending on the family, F2 DCT reads need special handling:
140 * K8: has a single DCT only
142 * F10h: each DCT has its own set of regs
146 * F15h: we select which DCT we access using F1x10C[DctCfgSel]
149 static int k8_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
155 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
158 static int f10_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
161 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
164 static int f15_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
170 if (addr >= 0x140 && addr <= 0x1a0) {
175 amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, ®);
178 amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
180 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
184 * Memory scrubber control interface. For K8, memory scrubbing is handled by
185 * hardware and can involve L2 cache, dcache as well as the main memory. With
186 * F10, this is extended to L3 cache scrubbing on CPU models sporting that
189 * This causes the "units" for the scrubbing speed to vary from 64 byte blocks
190 * (dram) over to cache lines. This is nasty, so we will use bandwidth in
191 * bytes/sec for the setting.
193 * Currently, we only do dram scrubbing. If the scrubbing is done in software on
194 * other archs, we might not have access to the caches directly.
198 * scan the scrub rate mapping table for a close or matching bandwidth value to
199 * issue. If requested is too big, then use last maximum value found.
201 static int __amd64_set_scrub_rate(struct pci_dev *ctl, u32 new_bw, u32 min_rate)
207 * map the configured rate (new_bw) to a value specific to the AMD64
208 * memory controller and apply to register. Search for the first
209 * bandwidth entry that is greater or equal than the setting requested
210 * and program that. If at last entry, turn off DRAM scrubbing.
212 for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
214 * skip scrub rates which aren't recommended
215 * (see F10 BKDG, F3x58)
217 if (scrubrates[i].scrubval < min_rate)
220 if (scrubrates[i].bandwidth <= new_bw)
224 * if no suitable bandwidth found, turn off DRAM scrubbing
225 * entirely by falling back to the last element in the
230 scrubval = scrubrates[i].scrubval;
232 pci_write_bits32(ctl, K8_SCRCTRL, scrubval, 0x001F);
235 return scrubrates[i].bandwidth;
240 static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
242 struct amd64_pvt *pvt = mci->pvt_info;
244 return __amd64_set_scrub_rate(pvt->F3, bw, pvt->min_scrubrate);
247 static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
249 struct amd64_pvt *pvt = mci->pvt_info;
251 int i, retval = -EINVAL;
253 amd64_read_pci_cfg(pvt->F3, K8_SCRCTRL, &scrubval);
255 scrubval = scrubval & 0x001F;
257 amd64_debug("pci-read, sdram scrub control value: %d\n", scrubval);
259 for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
260 if (scrubrates[i].scrubval == scrubval) {
261 retval = scrubrates[i].bandwidth;
269 * returns true if the SysAddr given by sys_addr matches the
270 * DRAM base/limit associated with node_id
272 static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr, int nid)
276 /* The K8 treats this as a 40-bit value. However, bits 63-40 will be
277 * all ones if the most significant implemented address bit is 1.
278 * Here we discard bits 63-40. See section 3.4.2 of AMD publication
279 * 24592: AMD x86-64 Architecture Programmer's Manual Volume 1
280 * Application Programming.
282 addr = sys_addr & 0x000000ffffffffffull;
284 return ((addr >= get_dram_base(pvt, nid)) &&
285 (addr <= get_dram_limit(pvt, nid)));
289 * Attempt to map a SysAddr to a node. On success, return a pointer to the
290 * mem_ctl_info structure for the node that the SysAddr maps to.
292 * On failure, return NULL.
294 static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
297 struct amd64_pvt *pvt;
302 * Here we use the DRAM Base (section 3.4.4.1) and DRAM Limit (section
303 * 3.4.4.2) registers to map the SysAddr to a node ID.
308 * The value of this field should be the same for all DRAM Base
309 * registers. Therefore we arbitrarily choose to read it from the
310 * register for node 0.
312 intlv_en = dram_intlv_en(pvt, 0);
315 for (node_id = 0; node_id < DRAM_RANGES; node_id++) {
316 if (amd64_base_limit_match(pvt, sys_addr, node_id))
322 if (unlikely((intlv_en != 0x01) &&
323 (intlv_en != 0x03) &&
324 (intlv_en != 0x07))) {
325 amd64_warn("DRAM Base[IntlvEn] junk value: 0x%x, BIOS bug?\n", intlv_en);
329 bits = (((u32) sys_addr) >> 12) & intlv_en;
331 for (node_id = 0; ; ) {
332 if ((dram_intlv_sel(pvt, node_id) & intlv_en) == bits)
333 break; /* intlv_sel field matches */
335 if (++node_id >= DRAM_RANGES)
339 /* sanity test for sys_addr */
340 if (unlikely(!amd64_base_limit_match(pvt, sys_addr, node_id))) {
341 amd64_warn("%s: sys_addr 0x%llx falls outside base/limit address"
342 "range for node %d with node interleaving enabled.\n",
343 __func__, sys_addr, node_id);
348 return edac_mc_find(node_id);
351 debugf2("sys_addr 0x%lx doesn't match any node\n",
352 (unsigned long)sys_addr);
358 * compute the CS base address of the @csrow on the DRAM controller @dct.
359 * For details see F2x[5C:40] in the processor's BKDG
361 static void get_cs_base_and_mask(struct amd64_pvt *pvt, int csrow, u8 dct,
362 u64 *base, u64 *mask)
364 u64 csbase, csmask, base_bits, mask_bits;
367 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
368 csbase = pvt->csels[dct].csbases[csrow];
369 csmask = pvt->csels[dct].csmasks[csrow];
370 base_bits = GENMASK(21, 31) | GENMASK(9, 15);
371 mask_bits = GENMASK(21, 29) | GENMASK(9, 15);
374 csbase = pvt->csels[dct].csbases[csrow];
375 csmask = pvt->csels[dct].csmasks[csrow >> 1];
378 if (boot_cpu_data.x86 == 0x15)
379 base_bits = mask_bits = GENMASK(19,30) | GENMASK(5,13);
381 base_bits = mask_bits = GENMASK(19,28) | GENMASK(5,13);
384 *base = (csbase & base_bits) << addr_shift;
387 /* poke holes for the csmask */
388 *mask &= ~(mask_bits << addr_shift);
390 *mask |= (csmask & mask_bits) << addr_shift;
393 #define for_each_chip_select(i, dct, pvt) \
394 for (i = 0; i < pvt->csels[dct].b_cnt; i++)
396 #define for_each_chip_select_mask(i, dct, pvt) \
397 for (i = 0; i < pvt->csels[dct].m_cnt; i++)
400 * @input_addr is an InputAddr associated with the node given by mci. Return the
401 * csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr).
403 static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr)
405 struct amd64_pvt *pvt;
411 for_each_chip_select(csrow, 0, pvt) {
412 if (!csrow_enabled(csrow, 0, pvt))
415 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
419 if ((input_addr & mask) == (base & mask)) {
420 debugf2("InputAddr 0x%lx matches csrow %d (node %d)\n",
421 (unsigned long)input_addr, csrow,
427 debugf2("no matching csrow for InputAddr 0x%lx (MC node %d)\n",
428 (unsigned long)input_addr, pvt->mc_node_id);
434 * Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094)
435 * for the node represented by mci. Info is passed back in *hole_base,
436 * *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if
437 * info is invalid. Info may be invalid for either of the following reasons:
439 * - The revision of the node is not E or greater. In this case, the DRAM Hole
440 * Address Register does not exist.
442 * - The DramHoleValid bit is cleared in the DRAM Hole Address Register,
443 * indicating that its contents are not valid.
445 * The values passed back in *hole_base, *hole_offset, and *hole_size are
446 * complete 32-bit values despite the fact that the bitfields in the DHAR
447 * only represent bits 31-24 of the base and offset values.
449 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
450 u64 *hole_offset, u64 *hole_size)
452 struct amd64_pvt *pvt = mci->pvt_info;
455 /* only revE and later have the DRAM Hole Address Register */
456 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_E) {
457 debugf1(" revision %d for node %d does not support DHAR\n",
458 pvt->ext_model, pvt->mc_node_id);
462 /* valid for Fam10h and above */
463 if (boot_cpu_data.x86 >= 0x10 && !dhar_mem_hoist_valid(pvt)) {
464 debugf1(" Dram Memory Hoisting is DISABLED on this system\n");
468 if (!dhar_valid(pvt)) {
469 debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n",
474 /* This node has Memory Hoisting */
476 /* +------------------+--------------------+--------------------+-----
477 * | memory | DRAM hole | relocated |
478 * | [0, (x - 1)] | [x, 0xffffffff] | addresses from |
480 * | | | [0x100000000, |
481 * | | | (0x100000000+ |
482 * | | | (0xffffffff-x))] |
483 * +------------------+--------------------+--------------------+-----
485 * Above is a diagram of physical memory showing the DRAM hole and the
486 * relocated addresses from the DRAM hole. As shown, the DRAM hole
487 * starts at address x (the base address) and extends through address
488 * 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the
489 * addresses in the hole so that they start at 0x100000000.
492 base = dhar_base(pvt);
495 *hole_size = (0x1ull << 32) - base;
497 if (boot_cpu_data.x86 > 0xf)
498 *hole_offset = f10_dhar_offset(pvt);
500 *hole_offset = k8_dhar_offset(pvt);
502 debugf1(" DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n",
503 pvt->mc_node_id, (unsigned long)*hole_base,
504 (unsigned long)*hole_offset, (unsigned long)*hole_size);
508 EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
511 * Return the DramAddr that the SysAddr given by @sys_addr maps to. It is
512 * assumed that sys_addr maps to the node given by mci.
514 * The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section
515 * 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a
516 * SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled,
517 * then it is also involved in translating a SysAddr to a DramAddr. Sections
518 * 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting.
519 * These parts of the documentation are unclear. I interpret them as follows:
521 * When node n receives a SysAddr, it processes the SysAddr as follows:
523 * 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM
524 * Limit registers for node n. If the SysAddr is not within the range
525 * specified by the base and limit values, then node n ignores the Sysaddr
526 * (since it does not map to node n). Otherwise continue to step 2 below.
528 * 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is
529 * disabled so skip to step 3 below. Otherwise see if the SysAddr is within
530 * the range of relocated addresses (starting at 0x100000000) from the DRAM
531 * hole. If not, skip to step 3 below. Else get the value of the
532 * DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the
533 * offset defined by this value from the SysAddr.
535 * 3. Obtain the base address for node n from the DRAMBase field of the DRAM
536 * Base register for node n. To obtain the DramAddr, subtract the base
537 * address from the SysAddr, as shown near the start of section 3.4.4 (p.70).
539 static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr)
541 struct amd64_pvt *pvt = mci->pvt_info;
542 u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
545 dram_base = get_dram_base(pvt, pvt->mc_node_id);
547 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
550 if ((sys_addr >= (1ull << 32)) &&
551 (sys_addr < ((1ull << 32) + hole_size))) {
552 /* use DHAR to translate SysAddr to DramAddr */
553 dram_addr = sys_addr - hole_offset;
555 debugf2("using DHAR to translate SysAddr 0x%lx to "
557 (unsigned long)sys_addr,
558 (unsigned long)dram_addr);
565 * Translate the SysAddr to a DramAddr as shown near the start of
566 * section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8
567 * only deals with 40-bit values. Therefore we discard bits 63-40 of
568 * sys_addr below. If bit 39 of sys_addr is 1 then the bits we
569 * discard are all 1s. Otherwise the bits we discard are all 0s. See
570 * section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture
571 * Programmer's Manual Volume 1 Application Programming.
573 dram_addr = (sys_addr & GENMASK(0, 39)) - dram_base;
575 debugf2("using DRAM Base register to translate SysAddr 0x%lx to "
576 "DramAddr 0x%lx\n", (unsigned long)sys_addr,
577 (unsigned long)dram_addr);
582 * @intlv_en is the value of the IntlvEn field from a DRAM Base register
583 * (section 3.4.4.1). Return the number of bits from a SysAddr that are used
584 * for node interleaving.
586 static int num_node_interleave_bits(unsigned intlv_en)
588 static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 };
591 BUG_ON(intlv_en > 7);
592 n = intlv_shift_table[intlv_en];
596 /* Translate the DramAddr given by @dram_addr to an InputAddr. */
597 static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr)
599 struct amd64_pvt *pvt;
606 * See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
607 * concerning translating a DramAddr to an InputAddr.
609 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
610 input_addr = ((dram_addr >> intlv_shift) & GENMASK(12, 35)) +
613 debugf2(" Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n",
614 intlv_shift, (unsigned long)dram_addr,
615 (unsigned long)input_addr);
621 * Translate the SysAddr represented by @sys_addr to an InputAddr. It is
622 * assumed that @sys_addr maps to the node given by mci.
624 static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
629 dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr));
631 debugf2("SysAdddr 0x%lx translates to InputAddr 0x%lx\n",
632 (unsigned long)sys_addr, (unsigned long)input_addr);
639 * @input_addr is an InputAddr associated with the node represented by mci.
640 * Translate @input_addr to a DramAddr and return the result.
642 static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
644 struct amd64_pvt *pvt;
645 int node_id, intlv_shift;
650 * Near the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
651 * shows how to translate a DramAddr to an InputAddr. Here we reverse
652 * this procedure. When translating from a DramAddr to an InputAddr, the
653 * bits used for node interleaving are discarded. Here we recover these
654 * bits from the IntlvSel field of the DRAM Limit register (section
655 * 3.4.4.2) for the node that input_addr is associated with.
658 node_id = pvt->mc_node_id;
659 BUG_ON((node_id < 0) || (node_id > 7));
661 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
663 if (intlv_shift == 0) {
664 debugf1(" InputAddr 0x%lx translates to DramAddr of "
665 "same value\n", (unsigned long)input_addr);
670 bits = ((input_addr & GENMASK(12, 35)) << intlv_shift) +
671 (input_addr & 0xfff);
673 intlv_sel = dram_intlv_sel(pvt, node_id) & ((1 << intlv_shift) - 1);
674 dram_addr = bits + (intlv_sel << 12);
676 debugf1("InputAddr 0x%lx translates to DramAddr 0x%lx "
677 "(%d node interleave bits)\n", (unsigned long)input_addr,
678 (unsigned long)dram_addr, intlv_shift);
684 * @dram_addr is a DramAddr that maps to the node represented by mci. Convert
685 * @dram_addr to a SysAddr.
687 static u64 dram_addr_to_sys_addr(struct mem_ctl_info *mci, u64 dram_addr)
689 struct amd64_pvt *pvt = mci->pvt_info;
690 u64 hole_base, hole_offset, hole_size, base, sys_addr;
693 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
696 if ((dram_addr >= hole_base) &&
697 (dram_addr < (hole_base + hole_size))) {
698 sys_addr = dram_addr + hole_offset;
700 debugf1("using DHAR to translate DramAddr 0x%lx to "
701 "SysAddr 0x%lx\n", (unsigned long)dram_addr,
702 (unsigned long)sys_addr);
708 base = get_dram_base(pvt, pvt->mc_node_id);
709 sys_addr = dram_addr + base;
712 * The sys_addr we have computed up to this point is a 40-bit value
713 * because the k8 deals with 40-bit values. However, the value we are
714 * supposed to return is a full 64-bit physical address. The AMD
715 * x86-64 architecture specifies that the most significant implemented
716 * address bit through bit 63 of a physical address must be either all
717 * 0s or all 1s. Therefore we sign-extend the 40-bit sys_addr to a
718 * 64-bit value below. See section 3.4.2 of AMD publication 24592:
719 * AMD x86-64 Architecture Programmer's Manual Volume 1 Application
722 sys_addr |= ~((sys_addr & (1ull << 39)) - 1);
724 debugf1(" Node %d, DramAddr 0x%lx to SysAddr 0x%lx\n",
725 pvt->mc_node_id, (unsigned long)dram_addr,
726 (unsigned long)sys_addr);
732 * @input_addr is an InputAddr associated with the node given by mci. Translate
733 * @input_addr to a SysAddr.
735 static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci,
738 return dram_addr_to_sys_addr(mci,
739 input_addr_to_dram_addr(mci, input_addr));
743 * Find the minimum and maximum InputAddr values that map to the given @csrow.
744 * Pass back these values in *input_addr_min and *input_addr_max.
746 static void find_csrow_limits(struct mem_ctl_info *mci, int csrow,
747 u64 *input_addr_min, u64 *input_addr_max)
749 struct amd64_pvt *pvt;
753 BUG_ON((csrow < 0) || (csrow >= pvt->csels[0].b_cnt));
755 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
757 *input_addr_min = base & ~mask;
758 *input_addr_max = base | mask;
761 /* Map the Error address to a PAGE and PAGE OFFSET. */
762 static inline void error_address_to_page_and_offset(u64 error_address,
763 u32 *page, u32 *offset)
765 *page = (u32) (error_address >> PAGE_SHIFT);
766 *offset = ((u32) error_address) & ~PAGE_MASK;
770 * @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address
771 * Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers
772 * of a node that detected an ECC memory error. mci represents the node that
773 * the error address maps to (possibly different from the node that detected
774 * the error). Return the number of the csrow that sys_addr maps to, or -1 on
777 static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
781 csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr));
784 amd64_mc_err(mci, "Failed to translate InputAddr to csrow for "
785 "address 0x%lx\n", (unsigned long)sys_addr);
789 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
791 static u16 extract_syndrome(struct err_regs *err)
793 return ((err->nbsh >> 15) & 0xff) | ((err->nbsl >> 16) & 0xff00);
797 * Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs
800 static enum edac_type amd64_determine_edac_cap(struct amd64_pvt *pvt)
803 enum dev_type edac_cap = EDAC_FLAG_NONE;
805 bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= K8_REV_F)
809 if (pvt->dclr0 & BIT(bit))
810 edac_cap = EDAC_FLAG_SECDED;
816 static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt);
818 static void amd64_dump_dramcfg_low(u32 dclr, int chan)
820 debugf1("F2x%d90 (DRAM Cfg Low): 0x%08x\n", chan, dclr);
822 debugf1(" DIMM type: %sbuffered; all DIMMs support ECC: %s\n",
823 (dclr & BIT(16)) ? "un" : "",
824 (dclr & BIT(19)) ? "yes" : "no");
826 debugf1(" PAR/ERR parity: %s\n",
827 (dclr & BIT(8)) ? "enabled" : "disabled");
829 if (boot_cpu_data.x86 == 0x10)
830 debugf1(" DCT 128bit mode width: %s\n",
831 (dclr & BIT(11)) ? "128b" : "64b");
833 debugf1(" x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
834 (dclr & BIT(12)) ? "yes" : "no",
835 (dclr & BIT(13)) ? "yes" : "no",
836 (dclr & BIT(14)) ? "yes" : "no",
837 (dclr & BIT(15)) ? "yes" : "no");
840 /* Display and decode various NB registers for debug purposes. */
841 static void dump_misc_regs(struct amd64_pvt *pvt)
843 debugf1("F3xE8 (NB Cap): 0x%08x\n", pvt->nbcap);
845 debugf1(" NB two channel DRAM capable: %s\n",
846 (pvt->nbcap & K8_NBCAP_DCT_DUAL) ? "yes" : "no");
848 debugf1(" ECC capable: %s, ChipKill ECC capable: %s\n",
849 (pvt->nbcap & K8_NBCAP_SECDED) ? "yes" : "no",
850 (pvt->nbcap & K8_NBCAP_CHIPKILL) ? "yes" : "no");
852 amd64_dump_dramcfg_low(pvt->dclr0, 0);
854 debugf1("F3xB0 (Online Spare): 0x%08x\n", pvt->online_spare);
856 debugf1("F1xF0 (DRAM Hole Address): 0x%08x, base: 0x%08x, "
858 pvt->dhar, dhar_base(pvt),
859 (boot_cpu_data.x86 == 0xf) ? k8_dhar_offset(pvt)
860 : f10_dhar_offset(pvt));
862 debugf1(" DramHoleValid: %s\n", dhar_valid(pvt) ? "yes" : "no");
864 amd64_debug_display_dimm_sizes(0, pvt);
866 /* everything below this point is Fam10h and above */
867 if (boot_cpu_data.x86 == 0xf)
870 amd64_debug_display_dimm_sizes(1, pvt);
872 amd64_info("using %s syndromes.\n", ((pvt->syn_type == 8) ? "x8" : "x4"));
874 /* Only if NOT ganged does dclr1 have valid info */
875 if (!dct_ganging_enabled(pvt))
876 amd64_dump_dramcfg_low(pvt->dclr1, 1);
880 * see BKDG, F2x[1,0][5C:40], F2[1,0][6C:60]
882 static void prep_chip_selects(struct amd64_pvt *pvt)
884 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
885 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
886 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
888 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
889 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
894 * Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
896 static void read_dct_base_mask(struct amd64_pvt *pvt)
900 prep_chip_selects(pvt);
902 for_each_chip_select(cs, 0, pvt) {
903 u32 reg0 = DCSB0 + (cs * 4);
904 u32 reg1 = DCSB1 + (cs * 4);
905 u32 *base0 = &pvt->csels[0].csbases[cs];
906 u32 *base1 = &pvt->csels[1].csbases[cs];
908 if (!amd64_read_dct_pci_cfg(pvt, reg0, base0))
909 debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
912 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
915 if (!amd64_read_dct_pci_cfg(pvt, reg1, base1))
916 debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
920 for_each_chip_select_mask(cs, 0, pvt) {
921 u32 reg0 = DCSM0 + (cs * 4);
922 u32 reg1 = DCSM1 + (cs * 4);
923 u32 *mask0 = &pvt->csels[0].csmasks[cs];
924 u32 *mask1 = &pvt->csels[1].csmasks[cs];
926 if (!amd64_read_dct_pci_cfg(pvt, reg0, mask0))
927 debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
930 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
933 if (!amd64_read_dct_pci_cfg(pvt, reg1, mask1))
934 debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
939 static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
943 /* F15h supports only DDR3 */
944 if (boot_cpu_data.x86 >= 0x15)
945 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
946 else if (boot_cpu_data.x86 == 0x10 || pvt->ext_model >= K8_REV_F) {
947 if (pvt->dchr0 & DDR3_MODE)
948 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
950 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
952 type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
955 amd64_info("CS%d: %s\n", cs, edac_mem_types[type]);
960 /* Get the number of DCT channels the memory controller is using. */
961 static int k8_early_channel_count(struct amd64_pvt *pvt)
965 if (pvt->ext_model >= K8_REV_F)
966 /* RevF (NPT) and later */
967 flag = pvt->dclr0 & F10_WIDTH_128;
969 /* RevE and earlier */
970 flag = pvt->dclr0 & REVE_WIDTH_128;
975 return (flag) ? 2 : 1;
978 /* Extract the ERROR ADDRESS for the K8 CPUs */
979 static u64 k8_get_error_address(struct mem_ctl_info *mci,
980 struct err_regs *info)
982 return (((u64) (info->nbeah & 0xff)) << 32) +
983 (info->nbeal & ~0x03);
986 static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
988 u32 off = range << 3;
990 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off, &pvt->ranges[range].base.lo);
991 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off, &pvt->ranges[range].lim.lo);
993 if (boot_cpu_data.x86 == 0xf)
996 if (!dram_rw(pvt, range))
999 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off, &pvt->ranges[range].base.hi);
1000 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off, &pvt->ranges[range].lim.hi);
1003 static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
1004 struct err_regs *err_info, u64 sys_addr)
1006 struct mem_ctl_info *src_mci;
1011 syndrome = extract_syndrome(err_info);
1013 /* CHIPKILL enabled */
1014 if (err_info->nbcfg & K8_NBCFG_CHIPKILL) {
1015 channel = get_channel_from_ecc_syndrome(mci, syndrome);
1018 * Syndrome didn't map, so we don't know which of the
1019 * 2 DIMMs is in error. So we need to ID 'both' of them
1022 amd64_mc_warn(mci, "unknown syndrome 0x%04x - possible "
1023 "error reporting race\n", syndrome);
1024 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1029 * non-chipkill ecc mode
1031 * The k8 documentation is unclear about how to determine the
1032 * channel number when using non-chipkill memory. This method
1033 * was obtained from email communication with someone at AMD.
1034 * (Wish the email was placed in this comment - norsk)
1036 channel = ((sys_addr & BIT(3)) != 0);
1040 * Find out which node the error address belongs to. This may be
1041 * different from the node that detected the error.
1043 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1045 amd64_mc_err(mci, "failed to map error addr 0x%lx to a node\n",
1046 (unsigned long)sys_addr);
1047 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1051 /* Now map the sys_addr to a CSROW */
1052 csrow = sys_addr_to_csrow(src_mci, sys_addr);
1054 edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR);
1056 error_address_to_page_and_offset(sys_addr, &page, &offset);
1058 edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow,
1059 channel, EDAC_MOD_STR);
1063 static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, int cs_mode)
1067 if (pvt->ext_model >= K8_REV_F)
1068 dbam_map = ddr2_dbam;
1069 else if (pvt->ext_model >= K8_REV_D)
1070 dbam_map = ddr2_dbam_revD;
1072 dbam_map = ddr2_dbam_revCG;
1074 return dbam_map[cs_mode];
1078 * Get the number of DCT channels in use.
1081 * number of Memory Channels in operation
1083 * contents of the DCL0_LOW register
1085 static int f10_early_channel_count(struct amd64_pvt *pvt)
1087 int i, j, channels = 0;
1089 /* If we are in 128 bit mode, then we are using 2 channels */
1090 if (pvt->dclr0 & F10_WIDTH_128) {
1096 * Need to check if in unganged mode: In such, there are 2 channels,
1097 * but they are not in 128 bit mode and thus the above 'dclr0' status
1100 * Need to check DCT0[0] and DCT1[0] to see if only one of them has
1101 * their CSEnable bit on. If so, then SINGLE DIMM case.
1103 debugf0("Data width is not 128 bits - need more decoding\n");
1106 * Check DRAM Bank Address Mapping values for each DIMM to see if there
1107 * is more than just one DIMM present in unganged mode. Need to check
1108 * both controllers since DIMMs can be placed in either one.
1110 for (i = 0; i < 2; i++) {
1111 u32 dbam = (i ? pvt->dbam1 : pvt->dbam0);
1113 for (j = 0; j < 4; j++) {
1114 if (DBAM_DIMM(j, dbam) > 0) {
1124 amd64_info("MCT channel count: %d\n", channels);
1129 static int f10_dbam_to_chip_select(struct amd64_pvt *pvt, int cs_mode)
1133 if (pvt->dchr0 & DDR3_MODE || pvt->dchr1 & DDR3_MODE)
1134 dbam_map = ddr3_dbam;
1136 dbam_map = ddr2_dbam;
1138 return dbam_map[cs_mode];
1141 static u64 f10_get_error_address(struct mem_ctl_info *mci,
1142 struct err_regs *info)
1144 return (((u64) (info->nbeah & 0xffff)) << 32) +
1145 (info->nbeal & ~0x01);
1148 static void f10_read_dram_ctl_register(struct amd64_pvt *pvt)
1151 if (!amd64_read_dct_pci_cfg(pvt, DCT_SEL_LO, &pvt->dct_sel_lo)) {
1152 debugf0("F2x110 (DCTSelLow): 0x%08x, High range addrs at: 0x%x\n",
1153 pvt->dct_sel_lo, dct_sel_baseaddr(pvt));
1155 debugf0(" mode: %s, All DCTs on: %s\n",
1156 (dct_ganging_enabled(pvt) ? "ganged" : "unganged"),
1157 (dct_dram_enabled(pvt) ? "yes" : "no"));
1159 if (!dct_ganging_enabled(pvt))
1160 debugf0(" Address range split per DCT: %s\n",
1161 (dct_high_range_enabled(pvt) ? "yes" : "no"));
1163 debugf0(" data interleave for ECC: %s, "
1164 "DRAM cleared since last warm reset: %s\n",
1165 (dct_data_intlv_enabled(pvt) ? "enabled" : "disabled"),
1166 (dct_memory_cleared(pvt) ? "yes" : "no"));
1168 debugf0(" channel interleave: %s, "
1169 "interleave bits selector: 0x%x\n",
1170 (dct_interleave_enabled(pvt) ? "enabled" : "disabled"),
1171 dct_sel_interleave_addr(pvt));
1174 amd64_read_dct_pci_cfg(pvt, DCT_SEL_HI, &pvt->dct_sel_hi);
1178 * Determine channel (DCT) based on the interleaving mode: F10h BKDG, 2.8.9 Memory
1179 * Interleaving Modes.
1181 static u8 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
1182 bool hi_range_sel, u8 intlv_en)
1184 u32 dct_sel_high = (pvt->dct_sel_lo >> 1) & 1;
1186 if (dct_ganging_enabled(pvt))
1190 return dct_sel_high;
1193 * see F2x110[DctSelIntLvAddr] - channel interleave mode
1195 if (dct_interleave_enabled(pvt)) {
1196 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1198 /* return DCT select function: 0=DCT0, 1=DCT1 */
1200 return sys_addr >> 6 & 1;
1202 if (intlv_addr & 0x2) {
1203 u8 shift = intlv_addr & 0x1 ? 9 : 6;
1204 u32 temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) % 2;
1206 return ((sys_addr >> shift) & 1) ^ temp;
1209 return (sys_addr >> (12 + hweight8(intlv_en))) & 1;
1212 if (dct_high_range_enabled(pvt))
1213 return ~dct_sel_high & 1;
1218 /* Convert the sys_addr to the normalized DCT address */
1219 static u64 f10_get_norm_dct_addr(struct amd64_pvt *pvt, int range,
1220 u64 sys_addr, bool hi_rng,
1221 u32 dct_sel_base_addr)
1224 u64 dram_base = get_dram_base(pvt, range);
1225 u64 hole_off = f10_dhar_offset(pvt);
1226 u32 hole_valid = dhar_valid(pvt);
1227 u64 dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
1232 * base address of high range is below 4Gb
1233 * (bits [47:27] at [31:11])
1234 * DRAM address space on this DCT is hoisted above 4Gb &&
1237 * remove hole offset from sys_addr
1239 * remove high range offset from sys_addr
1241 if ((!(dct_sel_base_addr >> 16) ||
1242 dct_sel_base_addr < dhar_base(pvt)) &&
1244 (sys_addr >= BIT_64(32)))
1245 chan_off = hole_off;
1247 chan_off = dct_sel_base_off;
1251 * we have a valid hole &&
1256 * remove dram base to normalize to DCT address
1258 if (hole_valid && (sys_addr >= BIT_64(32)))
1259 chan_off = hole_off;
1261 chan_off = dram_base;
1264 return (sys_addr & GENMASK(6,47)) - (chan_off & GENMASK(23,47));
1267 /* Hack for the time being - Can we get this from BIOS?? */
1268 #define CH0SPARE_RANK 0
1269 #define CH1SPARE_RANK 1
1272 * checks if the csrow passed in is marked as SPARED, if so returns the new
1275 static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
1280 /* Depending on channel, isolate respective SPARING info */
1282 swap_done = F10_ONLINE_SPARE_SWAPDONE1(pvt->online_spare);
1283 bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS1(pvt->online_spare);
1284 if (swap_done && (csrow == bad_dram_cs))
1285 csrow = CH1SPARE_RANK;
1287 swap_done = F10_ONLINE_SPARE_SWAPDONE0(pvt->online_spare);
1288 bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS0(pvt->online_spare);
1289 if (swap_done && (csrow == bad_dram_cs))
1290 csrow = CH0SPARE_RANK;
1296 * Iterate over the DRAM DCT "base" and "mask" registers looking for a
1297 * SystemAddr match on the specified 'ChannelSelect' and 'NodeID'
1300 * -EINVAL: NOT FOUND
1301 * 0..csrow = Chip-Select Row
1303 static int f10_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct)
1305 struct mem_ctl_info *mci;
1306 struct amd64_pvt *pvt;
1307 u64 cs_base, cs_mask;
1308 int cs_found = -EINVAL;
1315 pvt = mci->pvt_info;
1317 debugf1("input addr: 0x%llx, DCT: %d\n", in_addr, dct);
1319 for_each_chip_select(csrow, dct, pvt) {
1320 if (!csrow_enabled(csrow, dct, pvt))
1323 get_cs_base_and_mask(pvt, csrow, dct, &cs_base, &cs_mask);
1325 debugf1(" CSROW=%d CSBase=0x%llx CSMask=0x%llx\n",
1326 csrow, cs_base, cs_mask);
1330 debugf1(" (InputAddr & ~CSMask)=0x%llx "
1331 "(CSBase & ~CSMask)=0x%llx\n",
1332 (in_addr & cs_mask), (cs_base & cs_mask));
1334 if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
1335 cs_found = f10_process_possible_spare(pvt, dct, csrow);
1337 debugf1(" MATCH csrow=%d\n", cs_found);
1344 /* For a given @dram_range, check if @sys_addr falls within it. */
1345 static int f10_match_to_this_node(struct amd64_pvt *pvt, int range,
1346 u64 sys_addr, int *nid, int *chan_sel)
1348 int cs_found = -EINVAL;
1350 u32 tmp, dct_sel_base;
1352 bool high_range = false;
1354 u8 node_id = dram_dst_node(pvt, range);
1355 u8 intlv_en = dram_intlv_en(pvt, range);
1356 u32 intlv_sel = dram_intlv_sel(pvt, range);
1358 debugf1("(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
1359 range, sys_addr, get_dram_limit(pvt, range));
1362 (intlv_sel != ((sys_addr >> 12) & intlv_en)))
1365 dct_sel_base = dct_sel_baseaddr(pvt);
1368 * check whether addresses >= DctSelBaseAddr[47:27] are to be used to
1369 * select between DCT0 and DCT1.
1371 if (dct_high_range_enabled(pvt) &&
1372 !dct_ganging_enabled(pvt) &&
1373 ((sys_addr >> 27) >= (dct_sel_base >> 11)))
1376 channel = f10_determine_channel(pvt, sys_addr, high_range, intlv_en);
1378 chan_addr = f10_get_norm_dct_addr(pvt, range, sys_addr,
1379 high_range, dct_sel_base);
1381 /* remove Node ID (in case of node interleaving) */
1382 tmp = chan_addr & 0xFC0;
1384 chan_addr = ((chan_addr >> hweight8(intlv_en)) & GENMASK(12, 47)) | tmp;
1386 /* remove channel interleave and hash */
1387 if (dct_interleave_enabled(pvt) &&
1388 !dct_high_range_enabled(pvt) &&
1389 !dct_ganging_enabled(pvt)) {
1390 if (dct_sel_interleave_addr(pvt) != 1)
1391 chan_addr = (chan_addr >> 1) & GENMASK(6, 63);
1393 tmp = chan_addr & 0xFC0;
1394 chan_addr = ((chan_addr & GENMASK(14, 63)) >> 1) | tmp;
1398 debugf1(" (ChannelAddrLong=0x%llx)\n", chan_addr);
1400 cs_found = f10_lookup_addr_in_dct(chan_addr, node_id, channel);
1402 if (cs_found >= 0) {
1404 *chan_sel = channel;
1409 static int f10_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
1410 int *node, int *chan_sel)
1412 int range, cs_found = -EINVAL;
1414 for (range = 0; range < DRAM_RANGES; range++) {
1416 if (!dram_rw(pvt, range))
1419 if ((get_dram_base(pvt, range) <= sys_addr) &&
1420 (get_dram_limit(pvt, range) >= sys_addr)) {
1422 cs_found = f10_match_to_this_node(pvt, range,
1433 * For reference see "2.8.5 Routing DRAM Requests" in F10 BKDG. This code maps
1434 * a @sys_addr to NodeID, DCT (channel) and chip select (CSROW).
1436 * The @sys_addr is usually an error address received from the hardware
1439 static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
1440 struct err_regs *err_info,
1443 struct amd64_pvt *pvt = mci->pvt_info;
1445 int nid, csrow, chan = 0;
1448 csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
1451 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1455 error_address_to_page_and_offset(sys_addr, &page, &offset);
1457 syndrome = extract_syndrome(err_info);
1460 * We need the syndromes for channel detection only when we're
1461 * ganged. Otherwise @chan should already contain the channel at
1464 if (dct_ganging_enabled(pvt) && (pvt->nbcfg & K8_NBCFG_CHIPKILL))
1465 chan = get_channel_from_ecc_syndrome(mci, syndrome);
1468 edac_mc_handle_ce(mci, page, offset, syndrome, csrow, chan,
1472 * Channel unknown, report all channels on this CSROW as failed.
1474 for (chan = 0; chan < mci->csrows[csrow].nr_channels; chan++)
1475 edac_mc_handle_ce(mci, page, offset, syndrome,
1476 csrow, chan, EDAC_MOD_STR);
1480 * debug routine to display the memory sizes of all logical DIMMs and its
1483 static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt)
1485 int dimm, size0, size1, factor = 0;
1486 u32 *dcsb = ctrl ? pvt->csels[1].csbases : pvt->csels[0].csbases;
1487 u32 dbam = ctrl ? pvt->dbam1 : pvt->dbam0;
1489 if (boot_cpu_data.x86 == 0xf) {
1490 if (pvt->dclr0 & F10_WIDTH_128)
1493 /* K8 families < revF not supported yet */
1494 if (pvt->ext_model < K8_REV_F)
1500 dbam = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->dbam1 : pvt->dbam0;
1501 dcsb = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->csels[1].csbases
1502 : pvt->csels[0].csbases;
1504 debugf1("F2x%d80 (DRAM Bank Address Mapping): 0x%08x\n", ctrl, dbam);
1506 edac_printk(KERN_DEBUG, EDAC_MC, "DCT%d chip selects:\n", ctrl);
1508 /* Dump memory sizes for DIMM and its CSROWs */
1509 for (dimm = 0; dimm < 4; dimm++) {
1512 if (dcsb[dimm*2] & DCSB_CS_ENABLE)
1513 size0 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
1516 if (dcsb[dimm*2 + 1] & DCSB_CS_ENABLE)
1517 size1 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
1519 amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
1520 dimm * 2, size0 << factor,
1521 dimm * 2 + 1, size1 << factor);
1525 static struct amd64_family_type amd64_family_types[] = {
1528 .f1_id = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
1529 .f3_id = PCI_DEVICE_ID_AMD_K8_NB_MISC,
1531 .early_channel_count = k8_early_channel_count,
1532 .get_error_address = k8_get_error_address,
1533 .map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
1534 .dbam_to_cs = k8_dbam_to_chip_select,
1535 .read_dct_pci_cfg = k8_read_dct_pci_cfg,
1540 .f1_id = PCI_DEVICE_ID_AMD_10H_NB_MAP,
1541 .f3_id = PCI_DEVICE_ID_AMD_10H_NB_MISC,
1543 .early_channel_count = f10_early_channel_count,
1544 .get_error_address = f10_get_error_address,
1545 .read_dram_ctl_register = f10_read_dram_ctl_register,
1546 .map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow,
1547 .dbam_to_cs = f10_dbam_to_chip_select,
1548 .read_dct_pci_cfg = f10_read_dct_pci_cfg,
1554 .read_dct_pci_cfg = f15_read_dct_pci_cfg,
1559 static struct pci_dev *pci_get_related_function(unsigned int vendor,
1560 unsigned int device,
1561 struct pci_dev *related)
1563 struct pci_dev *dev = NULL;
1565 dev = pci_get_device(vendor, device, dev);
1567 if ((dev->bus->number == related->bus->number) &&
1568 (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
1570 dev = pci_get_device(vendor, device, dev);
1577 * These are tables of eigenvectors (one per line) which can be used for the
1578 * construction of the syndrome tables. The modified syndrome search algorithm
1579 * uses those to find the symbol in error and thus the DIMM.
1581 * Algorithm courtesy of Ross LaFetra from AMD.
1583 static u16 x4_vectors[] = {
1584 0x2f57, 0x1afe, 0x66cc, 0xdd88,
1585 0x11eb, 0x3396, 0x7f4c, 0xeac8,
1586 0x0001, 0x0002, 0x0004, 0x0008,
1587 0x1013, 0x3032, 0x4044, 0x8088,
1588 0x106b, 0x30d6, 0x70fc, 0xe0a8,
1589 0x4857, 0xc4fe, 0x13cc, 0x3288,
1590 0x1ac5, 0x2f4a, 0x5394, 0xa1e8,
1591 0x1f39, 0x251e, 0xbd6c, 0x6bd8,
1592 0x15c1, 0x2a42, 0x89ac, 0x4758,
1593 0x2b03, 0x1602, 0x4f0c, 0xca08,
1594 0x1f07, 0x3a0e, 0x6b04, 0xbd08,
1595 0x8ba7, 0x465e, 0x244c, 0x1cc8,
1596 0x2b87, 0x164e, 0x642c, 0xdc18,
1597 0x40b9, 0x80de, 0x1094, 0x20e8,
1598 0x27db, 0x1eb6, 0x9dac, 0x7b58,
1599 0x11c1, 0x2242, 0x84ac, 0x4c58,
1600 0x1be5, 0x2d7a, 0x5e34, 0xa718,
1601 0x4b39, 0x8d1e, 0x14b4, 0x28d8,
1602 0x4c97, 0xc87e, 0x11fc, 0x33a8,
1603 0x8e97, 0x497e, 0x2ffc, 0x1aa8,
1604 0x16b3, 0x3d62, 0x4f34, 0x8518,
1605 0x1e2f, 0x391a, 0x5cac, 0xf858,
1606 0x1d9f, 0x3b7a, 0x572c, 0xfe18,
1607 0x15f5, 0x2a5a, 0x5264, 0xa3b8,
1608 0x1dbb, 0x3b66, 0x715c, 0xe3f8,
1609 0x4397, 0xc27e, 0x17fc, 0x3ea8,
1610 0x1617, 0x3d3e, 0x6464, 0xb8b8,
1611 0x23ff, 0x12aa, 0xab6c, 0x56d8,
1612 0x2dfb, 0x1ba6, 0x913c, 0x7328,
1613 0x185d, 0x2ca6, 0x7914, 0x9e28,
1614 0x171b, 0x3e36, 0x7d7c, 0xebe8,
1615 0x4199, 0x82ee, 0x19f4, 0x2e58,
1616 0x4807, 0xc40e, 0x130c, 0x3208,
1617 0x1905, 0x2e0a, 0x5804, 0xac08,
1618 0x213f, 0x132a, 0xadfc, 0x5ba8,
1619 0x19a9, 0x2efe, 0xb5cc, 0x6f88,
1622 static u16 x8_vectors[] = {
1623 0x0145, 0x028a, 0x2374, 0x43c8, 0xa1f0, 0x0520, 0x0a40, 0x1480,
1624 0x0211, 0x0422, 0x0844, 0x1088, 0x01b0, 0x44e0, 0x23c0, 0xed80,
1625 0x1011, 0x0116, 0x022c, 0x0458, 0x08b0, 0x8c60, 0x2740, 0x4e80,
1626 0x0411, 0x0822, 0x1044, 0x0158, 0x02b0, 0x2360, 0x46c0, 0xab80,
1627 0x0811, 0x1022, 0x012c, 0x0258, 0x04b0, 0x4660, 0x8cc0, 0x2780,
1628 0x2071, 0x40e2, 0xa0c4, 0x0108, 0x0210, 0x0420, 0x0840, 0x1080,
1629 0x4071, 0x80e2, 0x0104, 0x0208, 0x0410, 0x0820, 0x1040, 0x2080,
1630 0x8071, 0x0102, 0x0204, 0x0408, 0x0810, 0x1020, 0x2040, 0x4080,
1631 0x019d, 0x03d6, 0x136c, 0x2198, 0x50b0, 0xb2e0, 0x0740, 0x0e80,
1632 0x0189, 0x03ea, 0x072c, 0x0e58, 0x1cb0, 0x56e0, 0x37c0, 0xf580,
1633 0x01fd, 0x0376, 0x06ec, 0x0bb8, 0x1110, 0x2220, 0x4440, 0x8880,
1634 0x0163, 0x02c6, 0x1104, 0x0758, 0x0eb0, 0x2be0, 0x6140, 0xc280,
1635 0x02fd, 0x01c6, 0x0b5c, 0x1108, 0x07b0, 0x25a0, 0x8840, 0x6180,
1636 0x0801, 0x012e, 0x025c, 0x04b8, 0x1370, 0x26e0, 0x57c0, 0xb580,
1637 0x0401, 0x0802, 0x015c, 0x02b8, 0x22b0, 0x13e0, 0x7140, 0xe280,
1638 0x0201, 0x0402, 0x0804, 0x01b8, 0x11b0, 0x31a0, 0x8040, 0x7180,
1639 0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080,
1640 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
1641 0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000,
1644 static int decode_syndrome(u16 syndrome, u16 *vectors, int num_vecs,
1647 unsigned int i, err_sym;
1649 for (err_sym = 0; err_sym < num_vecs / v_dim; err_sym++) {
1651 int v_idx = err_sym * v_dim;
1652 int v_end = (err_sym + 1) * v_dim;
1654 /* walk over all 16 bits of the syndrome */
1655 for (i = 1; i < (1U << 16); i <<= 1) {
1657 /* if bit is set in that eigenvector... */
1658 if (v_idx < v_end && vectors[v_idx] & i) {
1659 u16 ev_comp = vectors[v_idx++];
1661 /* ... and bit set in the modified syndrome, */
1671 /* can't get to zero, move to next symbol */
1676 debugf0("syndrome(%x) not found\n", syndrome);
1680 static int map_err_sym_to_channel(int err_sym, int sym_size)
1693 return err_sym >> 4;
1699 /* imaginary bits not in a DIMM */
1701 WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
1713 return err_sym >> 3;
1719 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
1721 struct amd64_pvt *pvt = mci->pvt_info;
1724 if (pvt->syn_type == 8)
1725 err_sym = decode_syndrome(syndrome, x8_vectors,
1726 ARRAY_SIZE(x8_vectors),
1728 else if (pvt->syn_type == 4)
1729 err_sym = decode_syndrome(syndrome, x4_vectors,
1730 ARRAY_SIZE(x4_vectors),
1733 amd64_warn("Illegal syndrome type: %u\n", pvt->syn_type);
1737 return map_err_sym_to_channel(err_sym, pvt->syn_type);
1741 * Handle any Correctable Errors (CEs) that have occurred. Check for valid ERROR
1742 * ADDRESS and process.
1744 static void amd64_handle_ce(struct mem_ctl_info *mci,
1745 struct err_regs *info)
1747 struct amd64_pvt *pvt = mci->pvt_info;
1750 /* Ensure that the Error Address is VALID */
1751 if (!(info->nbsh & K8_NBSH_VALID_ERROR_ADDR)) {
1752 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1753 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1757 sys_addr = pvt->ops->get_error_address(mci, info);
1759 amd64_mc_err(mci, "CE ERROR_ADDRESS= 0x%llx\n", sys_addr);
1761 pvt->ops->map_sysaddr_to_csrow(mci, info, sys_addr);
1764 /* Handle any Un-correctable Errors (UEs) */
1765 static void amd64_handle_ue(struct mem_ctl_info *mci,
1766 struct err_regs *info)
1768 struct amd64_pvt *pvt = mci->pvt_info;
1769 struct mem_ctl_info *log_mci, *src_mci = NULL;
1776 if (!(info->nbsh & K8_NBSH_VALID_ERROR_ADDR)) {
1777 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1778 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1782 sys_addr = pvt->ops->get_error_address(mci, info);
1785 * Find out which node the error address belongs to. This may be
1786 * different from the node that detected the error.
1788 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1790 amd64_mc_err(mci, "ERROR ADDRESS (0x%lx) NOT mapped to a MC\n",
1791 (unsigned long)sys_addr);
1792 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1798 csrow = sys_addr_to_csrow(log_mci, sys_addr);
1800 amd64_mc_err(mci, "ERROR_ADDRESS (0x%lx) NOT mapped to CS\n",
1801 (unsigned long)sys_addr);
1802 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1804 error_address_to_page_and_offset(sys_addr, &page, &offset);
1805 edac_mc_handle_ue(log_mci, page, offset, csrow, EDAC_MOD_STR);
1809 static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
1810 struct err_regs *info)
1812 u16 ec = EC(info->nbsl);
1813 u8 xec = XEC(info->nbsl, 0x1f);
1814 int ecc_type = (info->nbsh >> 13) & 0x3;
1816 /* Bail early out if this was an 'observed' error */
1817 if (PP(ec) == K8_NBSL_PP_OBS)
1820 /* Do only ECC errors */
1821 if (xec && xec != F10_NBSL_EXT_ERR_ECC)
1825 amd64_handle_ce(mci, info);
1826 else if (ecc_type == 1)
1827 amd64_handle_ue(mci, info);
1830 void amd64_decode_bus_error(int node_id, struct mce *m, u32 nbcfg)
1832 struct mem_ctl_info *mci = mcis[node_id];
1833 struct err_regs regs;
1835 regs.nbsl = (u32) m->status;
1836 regs.nbsh = (u32)(m->status >> 32);
1837 regs.nbeal = (u32) m->addr;
1838 regs.nbeah = (u32)(m->addr >> 32);
1841 __amd64_decode_bus_error(mci, ®s);
1844 * Check the UE bit of the NB status high register, if set generate some
1845 * logs. If NOT a GART error, then process the event as a NO-INFO event.
1846 * If it was a GART error, skip that process.
1848 * FIXME: this should go somewhere else, if at all.
1850 if (regs.nbsh & K8_NBSH_UC_ERR && !report_gart_errors)
1851 edac_mc_handle_ue_no_info(mci, "UE bit is set");
1856 * Use pvt->F2 which contains the F2 CPU PCI device to get the related
1857 * F1 (AddrMap) and F3 (Misc) devices. Return negative value on error.
1859 static int reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 f1_id, u16 f3_id)
1861 /* Reserve the ADDRESS MAP Device */
1862 pvt->F1 = pci_get_related_function(pvt->F2->vendor, f1_id, pvt->F2);
1864 amd64_err("error address map device not found: "
1865 "vendor %x device 0x%x (broken BIOS?)\n",
1866 PCI_VENDOR_ID_AMD, f1_id);
1870 /* Reserve the MISC Device */
1871 pvt->F3 = pci_get_related_function(pvt->F2->vendor, f3_id, pvt->F2);
1873 pci_dev_put(pvt->F1);
1876 amd64_err("error F3 device not found: "
1877 "vendor %x device 0x%x (broken BIOS?)\n",
1878 PCI_VENDOR_ID_AMD, f3_id);
1882 debugf1("F1: %s\n", pci_name(pvt->F1));
1883 debugf1("F2: %s\n", pci_name(pvt->F2));
1884 debugf1("F3: %s\n", pci_name(pvt->F3));
1889 static void free_mc_sibling_devs(struct amd64_pvt *pvt)
1891 pci_dev_put(pvt->F1);
1892 pci_dev_put(pvt->F3);
1896 * Retrieve the hardware registers of the memory controller (this includes the
1897 * 'Address Map' and 'Misc' device regs)
1899 static void read_mc_regs(struct amd64_pvt *pvt)
1906 * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since
1907 * those are Read-As-Zero
1909 rdmsrl(MSR_K8_TOP_MEM1, pvt->top_mem);
1910 debugf0(" TOP_MEM: 0x%016llx\n", pvt->top_mem);
1912 /* check first whether TOP_MEM2 is enabled */
1913 rdmsrl(MSR_K8_SYSCFG, msr_val);
1914 if (msr_val & (1U << 21)) {
1915 rdmsrl(MSR_K8_TOP_MEM2, pvt->top_mem2);
1916 debugf0(" TOP_MEM2: 0x%016llx\n", pvt->top_mem2);
1918 debugf0(" TOP_MEM2 disabled.\n");
1920 amd64_read_pci_cfg(pvt->F3, K8_NBCAP, &pvt->nbcap);
1922 if (pvt->ops->read_dram_ctl_register)
1923 pvt->ops->read_dram_ctl_register(pvt);
1925 for (range = 0; range < DRAM_RANGES; range++) {
1928 /* read settings for this DRAM range */
1929 read_dram_base_limit_regs(pvt, range);
1931 rw = dram_rw(pvt, range);
1935 debugf1(" DRAM range[%d], base: 0x%016llx; limit: 0x%016llx\n",
1937 get_dram_base(pvt, range),
1938 get_dram_limit(pvt, range));
1940 debugf1(" IntlvEn=%s; Range access: %s%s IntlvSel=%d DstNode=%d\n",
1941 dram_intlv_en(pvt, range) ? "Enabled" : "Disabled",
1942 (rw & 0x1) ? "R" : "-",
1943 (rw & 0x2) ? "W" : "-",
1944 dram_intlv_sel(pvt, range),
1945 dram_dst_node(pvt, range));
1948 read_dct_base_mask(pvt);
1950 amd64_read_pci_cfg(pvt->F1, DHAR, &pvt->dhar);
1951 amd64_read_dct_pci_cfg(pvt, DBAM0, &pvt->dbam0);
1953 amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
1955 amd64_read_dct_pci_cfg(pvt, DCLR0, &pvt->dclr0);
1956 amd64_read_dct_pci_cfg(pvt, DCHR0, &pvt->dchr0);
1958 if (!dct_ganging_enabled(pvt)) {
1959 amd64_read_dct_pci_cfg(pvt, DCLR1, &pvt->dclr1);
1960 amd64_read_dct_pci_cfg(pvt, DCHR1, &pvt->dchr1);
1963 if (boot_cpu_data.x86 >= 0x10) {
1964 amd64_read_pci_cfg(pvt->F3, EXT_NB_MCA_CFG, &tmp);
1965 amd64_read_dct_pci_cfg(pvt, DBAM1, &pvt->dbam1);
1968 if (boot_cpu_data.x86 == 0x10 &&
1969 boot_cpu_data.x86_model > 7 &&
1970 /* F3x180[EccSymbolSize]=1 => x8 symbols */
1976 dump_misc_regs(pvt);
1980 * NOTE: CPU Revision Dependent code
1983 * @csrow_nr ChipSelect Row Number (0..NUM_CHIPSELECTS-1)
1984 * k8 private pointer to -->
1985 * DRAM Bank Address mapping register
1987 * DCL register where dual_channel_active is
1989 * The DBAM register consists of 4 sets of 4 bits each definitions:
1992 * 0-3 CSROWs 0 and 1
1993 * 4-7 CSROWs 2 and 3
1994 * 8-11 CSROWs 4 and 5
1995 * 12-15 CSROWs 6 and 7
1997 * Values range from: 0 to 15
1998 * The meaning of the values depends on CPU revision and dual-channel state,
1999 * see relevant BKDG more info.
2001 * The memory controller provides for total of only 8 CSROWs in its current
2002 * architecture. Each "pair" of CSROWs normally represents just one DIMM in
2003 * single channel or two (2) DIMMs in dual channel mode.
2005 * The following code logic collapses the various tables for CSROW based on CPU
2009 * The number of PAGE_SIZE pages on the specified CSROW number it
2013 static u32 amd64_csrow_nr_pages(int csrow_nr, struct amd64_pvt *pvt)
2015 u32 cs_mode, nr_pages;
2018 * The math on this doesn't look right on the surface because x/2*4 can
2019 * be simplified to x*2 but this expression makes use of the fact that
2020 * it is integral math where 1/2=0. This intermediate value becomes the
2021 * number of bits to shift the DBAM register to extract the proper CSROW
2024 cs_mode = (pvt->dbam0 >> ((csrow_nr / 2) * 4)) & 0xF;
2026 nr_pages = pvt->ops->dbam_to_cs(pvt, cs_mode) << (20 - PAGE_SHIFT);
2029 * If dual channel then double the memory size of single channel.
2030 * Channel count is 1 or 2
2032 nr_pages <<= (pvt->channel_count - 1);
2034 debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode);
2035 debugf0(" nr_pages= %u channel-count = %d\n",
2036 nr_pages, pvt->channel_count);
2042 * Initialize the array of csrow attribute instances, based on the values
2043 * from pci config hardware registers.
2045 static int init_csrows(struct mem_ctl_info *mci)
2047 struct csrow_info *csrow;
2048 struct amd64_pvt *pvt = mci->pvt_info;
2049 u64 input_addr_min, input_addr_max, sys_addr, base, mask;
2053 amd64_read_pci_cfg(pvt->F3, K8_NBCFG, &val);
2056 pvt->ctl_error_info.nbcfg = val;
2058 debugf0("node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2059 pvt->mc_node_id, val,
2060 !!(val & K8_NBCFG_CHIPKILL), !!(val & K8_NBCFG_ECC_ENABLE));
2062 for_each_chip_select(i, 0, pvt) {
2063 csrow = &mci->csrows[i];
2065 if (!csrow_enabled(i, 0, pvt)) {
2066 debugf1("----CSROW %d EMPTY for node %d\n", i,
2071 debugf1("----CSROW %d VALID for MC node %d\n",
2072 i, pvt->mc_node_id);
2075 csrow->nr_pages = amd64_csrow_nr_pages(i, pvt);
2076 find_csrow_limits(mci, i, &input_addr_min, &input_addr_max);
2077 sys_addr = input_addr_to_sys_addr(mci, input_addr_min);
2078 csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT);
2079 sys_addr = input_addr_to_sys_addr(mci, input_addr_max);
2080 csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT);
2082 get_cs_base_and_mask(pvt, i, 0, &base, &mask);
2083 csrow->page_mask = ~mask;
2084 /* 8 bytes of resolution */
2086 csrow->mtype = amd64_determine_memory_type(pvt, i);
2088 debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i);
2089 debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n",
2090 (unsigned long)input_addr_min,
2091 (unsigned long)input_addr_max);
2092 debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n",
2093 (unsigned long)sys_addr, csrow->page_mask);
2094 debugf1(" nr_pages: %u first_page: 0x%lx "
2095 "last_page: 0x%lx\n",
2096 (unsigned)csrow->nr_pages,
2097 csrow->first_page, csrow->last_page);
2100 * determine whether CHIPKILL or JUST ECC or NO ECC is operating
2102 if (pvt->nbcfg & K8_NBCFG_ECC_ENABLE)
2104 (pvt->nbcfg & K8_NBCFG_CHIPKILL) ?
2105 EDAC_S4ECD4ED : EDAC_SECDED;
2107 csrow->edac_mode = EDAC_NONE;
2113 /* get all cores on this DCT */
2114 static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, int nid)
2118 for_each_online_cpu(cpu)
2119 if (amd_get_nb_id(cpu) == nid)
2120 cpumask_set_cpu(cpu, mask);
2123 /* check MCG_CTL on all the cpus on this node */
2124 static bool amd64_nb_mce_bank_enabled_on_node(int nid)
2130 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
2131 amd64_warn("%s: Error allocating mask\n", __func__);
2135 get_cpus_on_this_dct_cpumask(mask, nid);
2137 rdmsr_on_cpus(mask, MSR_IA32_MCG_CTL, msrs);
2139 for_each_cpu(cpu, mask) {
2140 struct msr *reg = per_cpu_ptr(msrs, cpu);
2141 nbe = reg->l & K8_MSR_MCGCTL_NBE;
2143 debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
2145 (nbe ? "enabled" : "disabled"));
2153 free_cpumask_var(mask);
2157 static int toggle_ecc_err_reporting(struct ecc_settings *s, u8 nid, bool on)
2159 cpumask_var_t cmask;
2162 if (!zalloc_cpumask_var(&cmask, GFP_KERNEL)) {
2163 amd64_warn("%s: error allocating mask\n", __func__);
2167 get_cpus_on_this_dct_cpumask(cmask, nid);
2169 rdmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2171 for_each_cpu(cpu, cmask) {
2173 struct msr *reg = per_cpu_ptr(msrs, cpu);
2176 if (reg->l & K8_MSR_MCGCTL_NBE)
2177 s->flags.nb_mce_enable = 1;
2179 reg->l |= K8_MSR_MCGCTL_NBE;
2182 * Turn off NB MCE reporting only when it was off before
2184 if (!s->flags.nb_mce_enable)
2185 reg->l &= ~K8_MSR_MCGCTL_NBE;
2188 wrmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2190 free_cpumask_var(cmask);
2195 static bool enable_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2199 u32 value, mask = 0x3; /* UECC/CECC enable */
2201 if (toggle_ecc_err_reporting(s, nid, ON)) {
2202 amd64_warn("Error enabling ECC reporting over MCGCTL!\n");
2206 amd64_read_pci_cfg(F3, NBCTL, &value);
2208 s->old_nbctl = value & mask;
2209 s->nbctl_valid = true;
2212 amd64_write_pci_cfg(F3, NBCTL, value);
2214 amd64_read_pci_cfg(F3, K8_NBCFG, &value);
2216 debugf0("1: node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2218 !!(value & K8_NBCFG_CHIPKILL), !!(value & K8_NBCFG_ECC_ENABLE));
2220 if (!(value & K8_NBCFG_ECC_ENABLE)) {
2221 amd64_warn("DRAM ECC disabled on this node, enabling...\n");
2223 s->flags.nb_ecc_prev = 0;
2225 /* Attempt to turn on DRAM ECC Enable */
2226 value |= K8_NBCFG_ECC_ENABLE;
2227 amd64_write_pci_cfg(F3, K8_NBCFG, value);
2229 amd64_read_pci_cfg(F3, K8_NBCFG, &value);
2231 if (!(value & K8_NBCFG_ECC_ENABLE)) {
2232 amd64_warn("Hardware rejected DRAM ECC enable,"
2233 "check memory DIMM configuration.\n");
2236 amd64_info("Hardware accepted DRAM ECC Enable\n");
2239 s->flags.nb_ecc_prev = 1;
2242 debugf0("2: node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2244 !!(value & K8_NBCFG_CHIPKILL), !!(value & K8_NBCFG_ECC_ENABLE));
2249 static void restore_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2252 u32 value, mask = 0x3; /* UECC/CECC enable */
2255 if (!s->nbctl_valid)
2258 amd64_read_pci_cfg(F3, NBCTL, &value);
2260 value |= s->old_nbctl;
2262 amd64_write_pci_cfg(F3, NBCTL, value);
2264 /* restore previous BIOS DRAM ECC "off" setting we force-enabled */
2265 if (!s->flags.nb_ecc_prev) {
2266 amd64_read_pci_cfg(F3, K8_NBCFG, &value);
2267 value &= ~K8_NBCFG_ECC_ENABLE;
2268 amd64_write_pci_cfg(F3, K8_NBCFG, value);
2271 /* restore the NB Enable MCGCTL bit */
2272 if (toggle_ecc_err_reporting(s, nid, OFF))
2273 amd64_warn("Error restoring NB MCGCTL settings!\n");
2277 * EDAC requires that the BIOS have ECC enabled before
2278 * taking over the processing of ECC errors. A command line
2279 * option allows to force-enable hardware ECC later in
2280 * enable_ecc_error_reporting().
2282 static const char *ecc_msg =
2283 "ECC disabled in the BIOS or no ECC capability, module will not load.\n"
2284 " Either enable ECC checking or force module loading by setting "
2285 "'ecc_enable_override'.\n"
2286 " (Note that use of the override may cause unknown side effects.)\n";
2288 static bool ecc_enabled(struct pci_dev *F3, u8 nid)
2292 bool nb_mce_en = false;
2294 amd64_read_pci_cfg(F3, K8_NBCFG, &value);
2296 ecc_en = !!(value & K8_NBCFG_ECC_ENABLE);
2297 amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
2299 nb_mce_en = amd64_nb_mce_bank_enabled_on_node(nid);
2301 amd64_notice("NB MCE bank disabled, set MSR "
2302 "0x%08x[4] on node %d to enable.\n",
2303 MSR_IA32_MCG_CTL, nid);
2305 if (!ecc_en || !nb_mce_en) {
2306 amd64_notice("%s", ecc_msg);
2312 struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +
2313 ARRAY_SIZE(amd64_inj_attrs) +
2316 struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } };
2318 static void set_mc_sysfs_attrs(struct mem_ctl_info *mci)
2320 unsigned int i = 0, j = 0;
2322 for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)
2323 sysfs_attrs[i] = amd64_dbg_attrs[i];
2325 if (boot_cpu_data.x86 >= 0x10)
2326 for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)
2327 sysfs_attrs[i] = amd64_inj_attrs[j];
2329 sysfs_attrs[i] = terminator;
2331 mci->mc_driver_sysfs_attributes = sysfs_attrs;
2334 static void setup_mci_misc_attrs(struct mem_ctl_info *mci)
2336 struct amd64_pvt *pvt = mci->pvt_info;
2338 mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;
2339 mci->edac_ctl_cap = EDAC_FLAG_NONE;
2341 if (pvt->nbcap & K8_NBCAP_SECDED)
2342 mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
2344 if (pvt->nbcap & K8_NBCAP_CHIPKILL)
2345 mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
2347 mci->edac_cap = amd64_determine_edac_cap(pvt);
2348 mci->mod_name = EDAC_MOD_STR;
2349 mci->mod_ver = EDAC_AMD64_VERSION;
2350 mci->ctl_name = pvt->ctl_name;
2351 mci->dev_name = pci_name(pvt->F2);
2352 mci->ctl_page_to_phys = NULL;
2354 /* memory scrubber interface */
2355 mci->set_sdram_scrub_rate = amd64_set_scrub_rate;
2356 mci->get_sdram_scrub_rate = amd64_get_scrub_rate;
2360 * returns a pointer to the family descriptor on success, NULL otherwise.
2362 static struct amd64_family_type *amd64_per_family_init(struct amd64_pvt *pvt)
2364 u8 fam = boot_cpu_data.x86;
2365 struct amd64_family_type *fam_type = NULL;
2369 fam_type = &amd64_family_types[K8_CPUS];
2370 pvt->ops = &amd64_family_types[K8_CPUS].ops;
2371 pvt->ctl_name = fam_type->ctl_name;
2372 pvt->min_scrubrate = K8_MIN_SCRUB_RATE_BITS;
2375 fam_type = &amd64_family_types[F10_CPUS];
2376 pvt->ops = &amd64_family_types[F10_CPUS].ops;
2377 pvt->ctl_name = fam_type->ctl_name;
2378 pvt->min_scrubrate = F10_MIN_SCRUB_RATE_BITS;
2382 amd64_err("Unsupported family!\n");
2386 pvt->ext_model = boot_cpu_data.x86_model >> 4;
2388 amd64_info("%s %sdetected (node %d).\n", pvt->ctl_name,
2390 (pvt->ext_model >= K8_REV_F ? "revF or later "
2391 : "revE or earlier ")
2392 : ""), pvt->mc_node_id);
2396 static int amd64_init_one_instance(struct pci_dev *F2)
2398 struct amd64_pvt *pvt = NULL;
2399 struct amd64_family_type *fam_type = NULL;
2400 struct mem_ctl_info *mci = NULL;
2402 u8 nid = get_node_id(F2);
2405 pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
2409 pvt->mc_node_id = nid;
2413 fam_type = amd64_per_family_init(pvt);
2418 err = reserve_mc_sibling_devs(pvt, fam_type->f1_id, fam_type->f3_id);
2425 * We need to determine how many memory channels there are. Then use
2426 * that information for calculating the size of the dynamic instance
2427 * tables in the 'mci' structure.
2430 pvt->channel_count = pvt->ops->early_channel_count(pvt);
2431 if (pvt->channel_count < 0)
2435 mci = edac_mc_alloc(0, pvt->csels[0].b_cnt, pvt->channel_count, nid);
2439 mci->pvt_info = pvt;
2440 mci->dev = &pvt->F2->dev;
2442 setup_mci_misc_attrs(mci);
2444 if (init_csrows(mci))
2445 mci->edac_cap = EDAC_FLAG_NONE;
2447 set_mc_sysfs_attrs(mci);
2450 if (edac_mc_add_mc(mci)) {
2451 debugf1("failed edac_mc_add_mc()\n");
2455 /* register stuff with EDAC MCE */
2456 if (report_gart_errors)
2457 amd_report_gart_errors(true);
2459 amd_register_ecc_decoder(amd64_decode_bus_error);
2463 atomic_inc(&drv_instances);
2471 free_mc_sibling_devs(pvt);
2480 static int __devinit amd64_probe_one_instance(struct pci_dev *pdev,
2481 const struct pci_device_id *mc_type)
2483 u8 nid = get_node_id(pdev);
2484 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2485 struct ecc_settings *s;
2488 ret = pci_enable_device(pdev);
2490 debugf0("ret=%d\n", ret);
2495 s = kzalloc(sizeof(struct ecc_settings), GFP_KERNEL);
2501 if (!ecc_enabled(F3, nid)) {
2504 if (!ecc_enable_override)
2507 amd64_warn("Forcing ECC on!\n");
2509 if (!enable_ecc_error_reporting(s, nid, F3))
2513 ret = amd64_init_one_instance(pdev);
2515 amd64_err("Error probing instance: %d\n", nid);
2516 restore_ecc_error_reporting(s, nid, F3);
2523 ecc_stngs[nid] = NULL;
2529 static void __devexit amd64_remove_one_instance(struct pci_dev *pdev)
2531 struct mem_ctl_info *mci;
2532 struct amd64_pvt *pvt;
2533 u8 nid = get_node_id(pdev);
2534 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2535 struct ecc_settings *s = ecc_stngs[nid];
2537 /* Remove from EDAC CORE tracking list */
2538 mci = edac_mc_del_mc(&pdev->dev);
2542 pvt = mci->pvt_info;
2544 restore_ecc_error_reporting(s, nid, F3);
2546 free_mc_sibling_devs(pvt);
2548 /* unregister from EDAC MCE */
2549 amd_report_gart_errors(false);
2550 amd_unregister_ecc_decoder(amd64_decode_bus_error);
2552 kfree(ecc_stngs[nid]);
2553 ecc_stngs[nid] = NULL;
2555 /* Free the EDAC CORE resources */
2556 mci->pvt_info = NULL;
2564 * This table is part of the interface for loading drivers for PCI devices. The
2565 * PCI core identifies what devices are on a system during boot, and then
2566 * inquiry this table to see if this driver is for a given device found.
2568 static const struct pci_device_id amd64_pci_table[] __devinitdata = {
2570 .vendor = PCI_VENDOR_ID_AMD,
2571 .device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
2572 .subvendor = PCI_ANY_ID,
2573 .subdevice = PCI_ANY_ID,
2578 .vendor = PCI_VENDOR_ID_AMD,
2579 .device = PCI_DEVICE_ID_AMD_10H_NB_DRAM,
2580 .subvendor = PCI_ANY_ID,
2581 .subdevice = PCI_ANY_ID,
2587 MODULE_DEVICE_TABLE(pci, amd64_pci_table);
2589 static struct pci_driver amd64_pci_driver = {
2590 .name = EDAC_MOD_STR,
2591 .probe = amd64_probe_one_instance,
2592 .remove = __devexit_p(amd64_remove_one_instance),
2593 .id_table = amd64_pci_table,
2596 static void setup_pci_device(void)
2598 struct mem_ctl_info *mci;
2599 struct amd64_pvt *pvt;
2607 pvt = mci->pvt_info;
2609 edac_pci_create_generic_ctl(&pvt->F2->dev, EDAC_MOD_STR);
2611 if (!amd64_ctl_pci) {
2612 pr_warning("%s(): Unable to create PCI control\n",
2615 pr_warning("%s(): PCI error report via EDAC not set\n",
2621 static int __init amd64_edac_init(void)
2625 edac_printk(KERN_INFO, EDAC_MOD_STR, EDAC_AMD64_VERSION "\n");
2629 if (amd_cache_northbridges() < 0)
2633 mcis = kzalloc(amd_nb_num() * sizeof(mcis[0]), GFP_KERNEL);
2634 ecc_stngs = kzalloc(amd_nb_num() * sizeof(ecc_stngs[0]), GFP_KERNEL);
2635 if (!(mcis && ecc_stngs))
2638 msrs = msrs_alloc();
2642 err = pci_register_driver(&amd64_pci_driver);
2647 if (!atomic_read(&drv_instances))
2648 goto err_no_instances;
2654 pci_unregister_driver(&amd64_pci_driver);
2671 static void __exit amd64_edac_exit(void)
2674 edac_pci_release_generic_ctl(amd64_ctl_pci);
2676 pci_unregister_driver(&amd64_pci_driver);
2688 module_init(amd64_edac_init);
2689 module_exit(amd64_edac_exit);
2691 MODULE_LICENSE("GPL");
2692 MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "
2693 "Dave Peterson, Thayne Harbaugh");
2694 MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "
2695 EDAC_AMD64_VERSION);
2697 module_param(edac_op_state, int, 0444);
2698 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");