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 * Valid scrub rates for the K8 hardware memory scrubber. We map the scrubbing
29 * bandwidth to a valid bit pattern. The 'set' operation finds the 'matching-
32 *FIXME: Produce a better mapping/linearisation.
35 u32 scrubval; /* bit pattern for scrub rate */
36 u32 bandwidth; /* bandwidth consumed (bytes/sec) */
38 { 0x01, 1600000000UL},
60 { 0x00, 0UL}, /* scrubbing off */
63 static int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset,
64 u32 *val, const char *func)
68 err = pci_read_config_dword(pdev, offset, val);
70 amd64_warn("%s: error reading F%dx%03x.\n",
71 func, PCI_FUNC(pdev->devfn), offset);
76 int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset,
77 u32 val, const char *func)
81 err = pci_write_config_dword(pdev, offset, val);
83 amd64_warn("%s: error writing to F%dx%03x.\n",
84 func, PCI_FUNC(pdev->devfn), offset);
91 * Depending on the family, F2 DCT reads need special handling:
93 * K8: has a single DCT only
95 * F10h: each DCT has its own set of regs
99 * F15h: we select which DCT we access using F1x10C[DctCfgSel]
102 static int k8_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
108 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
111 static int f10_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
114 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
118 * Select DCT to which PCI cfg accesses are routed
120 static void f15h_select_dct(struct amd64_pvt *pvt, u8 dct)
124 amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, ®);
127 amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
130 static int f15_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
135 if (addr >= 0x140 && addr <= 0x1a0) {
140 f15h_select_dct(pvt, dct);
142 return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
146 * Memory scrubber control interface. For K8, memory scrubbing is handled by
147 * hardware and can involve L2 cache, dcache as well as the main memory. With
148 * F10, this is extended to L3 cache scrubbing on CPU models sporting that
151 * This causes the "units" for the scrubbing speed to vary from 64 byte blocks
152 * (dram) over to cache lines. This is nasty, so we will use bandwidth in
153 * bytes/sec for the setting.
155 * Currently, we only do dram scrubbing. If the scrubbing is done in software on
156 * other archs, we might not have access to the caches directly.
160 * scan the scrub rate mapping table for a close or matching bandwidth value to
161 * issue. If requested is too big, then use last maximum value found.
163 static int __amd64_set_scrub_rate(struct pci_dev *ctl, u32 new_bw, u32 min_rate)
169 * map the configured rate (new_bw) to a value specific to the AMD64
170 * memory controller and apply to register. Search for the first
171 * bandwidth entry that is greater or equal than the setting requested
172 * and program that. If at last entry, turn off DRAM scrubbing.
174 for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
176 * skip scrub rates which aren't recommended
177 * (see F10 BKDG, F3x58)
179 if (scrubrates[i].scrubval < min_rate)
182 if (scrubrates[i].bandwidth <= new_bw)
186 * if no suitable bandwidth found, turn off DRAM scrubbing
187 * entirely by falling back to the last element in the
192 scrubval = scrubrates[i].scrubval;
194 pci_write_bits32(ctl, SCRCTRL, scrubval, 0x001F);
197 return scrubrates[i].bandwidth;
202 static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
204 struct amd64_pvt *pvt = mci->pvt_info;
205 u32 min_scrubrate = 0x5;
207 if (boot_cpu_data.x86 == 0xf)
210 /* F15h Erratum #505 */
211 if (boot_cpu_data.x86 == 0x15)
212 f15h_select_dct(pvt, 0);
214 return __amd64_set_scrub_rate(pvt->F3, bw, min_scrubrate);
217 static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
219 struct amd64_pvt *pvt = mci->pvt_info;
221 int i, retval = -EINVAL;
223 /* F15h Erratum #505 */
224 if (boot_cpu_data.x86 == 0x15)
225 f15h_select_dct(pvt, 0);
227 amd64_read_pci_cfg(pvt->F3, SCRCTRL, &scrubval);
229 scrubval = scrubval & 0x001F;
231 for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
232 if (scrubrates[i].scrubval == scrubval) {
233 retval = scrubrates[i].bandwidth;
241 * returns true if the SysAddr given by sys_addr matches the
242 * DRAM base/limit associated with node_id
244 static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr,
249 /* The K8 treats this as a 40-bit value. However, bits 63-40 will be
250 * all ones if the most significant implemented address bit is 1.
251 * Here we discard bits 63-40. See section 3.4.2 of AMD publication
252 * 24592: AMD x86-64 Architecture Programmer's Manual Volume 1
253 * Application Programming.
255 addr = sys_addr & 0x000000ffffffffffull;
257 return ((addr >= get_dram_base(pvt, nid)) &&
258 (addr <= get_dram_limit(pvt, nid)));
262 * Attempt to map a SysAddr to a node. On success, return a pointer to the
263 * mem_ctl_info structure for the node that the SysAddr maps to.
265 * On failure, return NULL.
267 static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
270 struct amd64_pvt *pvt;
275 * Here we use the DRAM Base (section 3.4.4.1) and DRAM Limit (section
276 * 3.4.4.2) registers to map the SysAddr to a node ID.
281 * The value of this field should be the same for all DRAM Base
282 * registers. Therefore we arbitrarily choose to read it from the
283 * register for node 0.
285 intlv_en = dram_intlv_en(pvt, 0);
288 for (node_id = 0; node_id < DRAM_RANGES; node_id++) {
289 if (amd64_base_limit_match(pvt, sys_addr, node_id))
295 if (unlikely((intlv_en != 0x01) &&
296 (intlv_en != 0x03) &&
297 (intlv_en != 0x07))) {
298 amd64_warn("DRAM Base[IntlvEn] junk value: 0x%x, BIOS bug?\n", intlv_en);
302 bits = (((u32) sys_addr) >> 12) & intlv_en;
304 for (node_id = 0; ; ) {
305 if ((dram_intlv_sel(pvt, node_id) & intlv_en) == bits)
306 break; /* intlv_sel field matches */
308 if (++node_id >= DRAM_RANGES)
312 /* sanity test for sys_addr */
313 if (unlikely(!amd64_base_limit_match(pvt, sys_addr, node_id))) {
314 amd64_warn("%s: sys_addr 0x%llx falls outside base/limit address"
315 "range for node %d with node interleaving enabled.\n",
316 __func__, sys_addr, node_id);
321 return edac_mc_find((int)node_id);
324 debugf2("sys_addr 0x%lx doesn't match any node\n",
325 (unsigned long)sys_addr);
331 * compute the CS base address of the @csrow on the DRAM controller @dct.
332 * For details see F2x[5C:40] in the processor's BKDG
334 static void get_cs_base_and_mask(struct amd64_pvt *pvt, int csrow, u8 dct,
335 u64 *base, u64 *mask)
337 u64 csbase, csmask, base_bits, mask_bits;
340 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
341 csbase = pvt->csels[dct].csbases[csrow];
342 csmask = pvt->csels[dct].csmasks[csrow];
343 base_bits = GENMASK(21, 31) | GENMASK(9, 15);
344 mask_bits = GENMASK(21, 29) | GENMASK(9, 15);
347 csbase = pvt->csels[dct].csbases[csrow];
348 csmask = pvt->csels[dct].csmasks[csrow >> 1];
351 if (boot_cpu_data.x86 == 0x15)
352 base_bits = mask_bits = GENMASK(19,30) | GENMASK(5,13);
354 base_bits = mask_bits = GENMASK(19,28) | GENMASK(5,13);
357 *base = (csbase & base_bits) << addr_shift;
360 /* poke holes for the csmask */
361 *mask &= ~(mask_bits << addr_shift);
363 *mask |= (csmask & mask_bits) << addr_shift;
366 #define for_each_chip_select(i, dct, pvt) \
367 for (i = 0; i < pvt->csels[dct].b_cnt; i++)
369 #define chip_select_base(i, dct, pvt) \
370 pvt->csels[dct].csbases[i]
372 #define for_each_chip_select_mask(i, dct, pvt) \
373 for (i = 0; i < pvt->csels[dct].m_cnt; i++)
376 * @input_addr is an InputAddr associated with the node given by mci. Return the
377 * csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr).
379 static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr)
381 struct amd64_pvt *pvt;
387 for_each_chip_select(csrow, 0, pvt) {
388 if (!csrow_enabled(csrow, 0, pvt))
391 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
395 if ((input_addr & mask) == (base & mask)) {
396 debugf2("InputAddr 0x%lx matches csrow %d (node %d)\n",
397 (unsigned long)input_addr, csrow,
403 debugf2("no matching csrow for InputAddr 0x%lx (MC node %d)\n",
404 (unsigned long)input_addr, pvt->mc_node_id);
410 * Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094)
411 * for the node represented by mci. Info is passed back in *hole_base,
412 * *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if
413 * info is invalid. Info may be invalid for either of the following reasons:
415 * - The revision of the node is not E or greater. In this case, the DRAM Hole
416 * Address Register does not exist.
418 * - The DramHoleValid bit is cleared in the DRAM Hole Address Register,
419 * indicating that its contents are not valid.
421 * The values passed back in *hole_base, *hole_offset, and *hole_size are
422 * complete 32-bit values despite the fact that the bitfields in the DHAR
423 * only represent bits 31-24 of the base and offset values.
425 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
426 u64 *hole_offset, u64 *hole_size)
428 struct amd64_pvt *pvt = mci->pvt_info;
431 /* only revE and later have the DRAM Hole Address Register */
432 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_E) {
433 debugf1(" revision %d for node %d does not support DHAR\n",
434 pvt->ext_model, pvt->mc_node_id);
438 /* valid for Fam10h and above */
439 if (boot_cpu_data.x86 >= 0x10 && !dhar_mem_hoist_valid(pvt)) {
440 debugf1(" Dram Memory Hoisting is DISABLED on this system\n");
444 if (!dhar_valid(pvt)) {
445 debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n",
450 /* This node has Memory Hoisting */
452 /* +------------------+--------------------+--------------------+-----
453 * | memory | DRAM hole | relocated |
454 * | [0, (x - 1)] | [x, 0xffffffff] | addresses from |
456 * | | | [0x100000000, |
457 * | | | (0x100000000+ |
458 * | | | (0xffffffff-x))] |
459 * +------------------+--------------------+--------------------+-----
461 * Above is a diagram of physical memory showing the DRAM hole and the
462 * relocated addresses from the DRAM hole. As shown, the DRAM hole
463 * starts at address x (the base address) and extends through address
464 * 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the
465 * addresses in the hole so that they start at 0x100000000.
468 base = dhar_base(pvt);
471 *hole_size = (0x1ull << 32) - base;
473 if (boot_cpu_data.x86 > 0xf)
474 *hole_offset = f10_dhar_offset(pvt);
476 *hole_offset = k8_dhar_offset(pvt);
478 debugf1(" DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n",
479 pvt->mc_node_id, (unsigned long)*hole_base,
480 (unsigned long)*hole_offset, (unsigned long)*hole_size);
484 EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
487 * Return the DramAddr that the SysAddr given by @sys_addr maps to. It is
488 * assumed that sys_addr maps to the node given by mci.
490 * The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section
491 * 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a
492 * SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled,
493 * then it is also involved in translating a SysAddr to a DramAddr. Sections
494 * 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting.
495 * These parts of the documentation are unclear. I interpret them as follows:
497 * When node n receives a SysAddr, it processes the SysAddr as follows:
499 * 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM
500 * Limit registers for node n. If the SysAddr is not within the range
501 * specified by the base and limit values, then node n ignores the Sysaddr
502 * (since it does not map to node n). Otherwise continue to step 2 below.
504 * 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is
505 * disabled so skip to step 3 below. Otherwise see if the SysAddr is within
506 * the range of relocated addresses (starting at 0x100000000) from the DRAM
507 * hole. If not, skip to step 3 below. Else get the value of the
508 * DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the
509 * offset defined by this value from the SysAddr.
511 * 3. Obtain the base address for node n from the DRAMBase field of the DRAM
512 * Base register for node n. To obtain the DramAddr, subtract the base
513 * address from the SysAddr, as shown near the start of section 3.4.4 (p.70).
515 static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr)
517 struct amd64_pvt *pvt = mci->pvt_info;
518 u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
521 dram_base = get_dram_base(pvt, pvt->mc_node_id);
523 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
526 if ((sys_addr >= (1ull << 32)) &&
527 (sys_addr < ((1ull << 32) + hole_size))) {
528 /* use DHAR to translate SysAddr to DramAddr */
529 dram_addr = sys_addr - hole_offset;
531 debugf2("using DHAR to translate SysAddr 0x%lx to "
533 (unsigned long)sys_addr,
534 (unsigned long)dram_addr);
541 * Translate the SysAddr to a DramAddr as shown near the start of
542 * section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8
543 * only deals with 40-bit values. Therefore we discard bits 63-40 of
544 * sys_addr below. If bit 39 of sys_addr is 1 then the bits we
545 * discard are all 1s. Otherwise the bits we discard are all 0s. See
546 * section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture
547 * Programmer's Manual Volume 1 Application Programming.
549 dram_addr = (sys_addr & GENMASK(0, 39)) - dram_base;
551 debugf2("using DRAM Base register to translate SysAddr 0x%lx to "
552 "DramAddr 0x%lx\n", (unsigned long)sys_addr,
553 (unsigned long)dram_addr);
558 * @intlv_en is the value of the IntlvEn field from a DRAM Base register
559 * (section 3.4.4.1). Return the number of bits from a SysAddr that are used
560 * for node interleaving.
562 static int num_node_interleave_bits(unsigned intlv_en)
564 static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 };
567 BUG_ON(intlv_en > 7);
568 n = intlv_shift_table[intlv_en];
572 /* Translate the DramAddr given by @dram_addr to an InputAddr. */
573 static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr)
575 struct amd64_pvt *pvt;
582 * See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
583 * concerning translating a DramAddr to an InputAddr.
585 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
586 input_addr = ((dram_addr >> intlv_shift) & GENMASK(12, 35)) +
589 debugf2(" Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n",
590 intlv_shift, (unsigned long)dram_addr,
591 (unsigned long)input_addr);
597 * Translate the SysAddr represented by @sys_addr to an InputAddr. It is
598 * assumed that @sys_addr maps to the node given by mci.
600 static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
605 dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr));
607 debugf2("SysAdddr 0x%lx translates to InputAddr 0x%lx\n",
608 (unsigned long)sys_addr, (unsigned long)input_addr);
615 * @input_addr is an InputAddr associated with the node represented by mci.
616 * Translate @input_addr to a DramAddr and return the result.
618 static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
620 struct amd64_pvt *pvt;
621 unsigned node_id, intlv_shift;
626 * Near the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
627 * shows how to translate a DramAddr to an InputAddr. Here we reverse
628 * this procedure. When translating from a DramAddr to an InputAddr, the
629 * bits used for node interleaving are discarded. Here we recover these
630 * bits from the IntlvSel field of the DRAM Limit register (section
631 * 3.4.4.2) for the node that input_addr is associated with.
634 node_id = pvt->mc_node_id;
638 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
639 if (intlv_shift == 0) {
640 debugf1(" InputAddr 0x%lx translates to DramAddr of "
641 "same value\n", (unsigned long)input_addr);
646 bits = ((input_addr & GENMASK(12, 35)) << intlv_shift) +
647 (input_addr & 0xfff);
649 intlv_sel = dram_intlv_sel(pvt, node_id) & ((1 << intlv_shift) - 1);
650 dram_addr = bits + (intlv_sel << 12);
652 debugf1("InputAddr 0x%lx translates to DramAddr 0x%lx "
653 "(%d node interleave bits)\n", (unsigned long)input_addr,
654 (unsigned long)dram_addr, intlv_shift);
660 * @dram_addr is a DramAddr that maps to the node represented by mci. Convert
661 * @dram_addr to a SysAddr.
663 static u64 dram_addr_to_sys_addr(struct mem_ctl_info *mci, u64 dram_addr)
665 struct amd64_pvt *pvt = mci->pvt_info;
666 u64 hole_base, hole_offset, hole_size, base, sys_addr;
669 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
672 if ((dram_addr >= hole_base) &&
673 (dram_addr < (hole_base + hole_size))) {
674 sys_addr = dram_addr + hole_offset;
676 debugf1("using DHAR to translate DramAddr 0x%lx to "
677 "SysAddr 0x%lx\n", (unsigned long)dram_addr,
678 (unsigned long)sys_addr);
684 base = get_dram_base(pvt, pvt->mc_node_id);
685 sys_addr = dram_addr + base;
688 * The sys_addr we have computed up to this point is a 40-bit value
689 * because the k8 deals with 40-bit values. However, the value we are
690 * supposed to return is a full 64-bit physical address. The AMD
691 * x86-64 architecture specifies that the most significant implemented
692 * address bit through bit 63 of a physical address must be either all
693 * 0s or all 1s. Therefore we sign-extend the 40-bit sys_addr to a
694 * 64-bit value below. See section 3.4.2 of AMD publication 24592:
695 * AMD x86-64 Architecture Programmer's Manual Volume 1 Application
698 sys_addr |= ~((sys_addr & (1ull << 39)) - 1);
700 debugf1(" Node %d, DramAddr 0x%lx to SysAddr 0x%lx\n",
701 pvt->mc_node_id, (unsigned long)dram_addr,
702 (unsigned long)sys_addr);
708 * @input_addr is an InputAddr associated with the node given by mci. Translate
709 * @input_addr to a SysAddr.
711 static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci,
714 return dram_addr_to_sys_addr(mci,
715 input_addr_to_dram_addr(mci, input_addr));
719 * Find the minimum and maximum InputAddr values that map to the given @csrow.
720 * Pass back these values in *input_addr_min and *input_addr_max.
722 static void find_csrow_limits(struct mem_ctl_info *mci, int csrow,
723 u64 *input_addr_min, u64 *input_addr_max)
725 struct amd64_pvt *pvt;
729 BUG_ON((csrow < 0) || (csrow >= pvt->csels[0].b_cnt));
731 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
733 *input_addr_min = base & ~mask;
734 *input_addr_max = base | mask;
737 /* Map the Error address to a PAGE and PAGE OFFSET. */
738 static inline void error_address_to_page_and_offset(u64 error_address,
739 u32 *page, u32 *offset)
741 *page = (u32) (error_address >> PAGE_SHIFT);
742 *offset = ((u32) error_address) & ~PAGE_MASK;
746 * @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address
747 * Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers
748 * of a node that detected an ECC memory error. mci represents the node that
749 * the error address maps to (possibly different from the node that detected
750 * the error). Return the number of the csrow that sys_addr maps to, or -1 on
753 static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
757 csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr));
760 amd64_mc_err(mci, "Failed to translate InputAddr to csrow for "
761 "address 0x%lx\n", (unsigned long)sys_addr);
765 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
768 * Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs
771 static unsigned long amd64_determine_edac_cap(struct amd64_pvt *pvt)
774 unsigned long edac_cap = EDAC_FLAG_NONE;
776 bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= K8_REV_F)
780 if (pvt->dclr0 & BIT(bit))
781 edac_cap = EDAC_FLAG_SECDED;
786 static void amd64_debug_display_dimm_sizes(struct amd64_pvt *, u8);
788 static void amd64_dump_dramcfg_low(u32 dclr, int chan)
790 debugf1("F2x%d90 (DRAM Cfg Low): 0x%08x\n", chan, dclr);
792 debugf1(" DIMM type: %sbuffered; all DIMMs support ECC: %s\n",
793 (dclr & BIT(16)) ? "un" : "",
794 (dclr & BIT(19)) ? "yes" : "no");
796 debugf1(" PAR/ERR parity: %s\n",
797 (dclr & BIT(8)) ? "enabled" : "disabled");
799 if (boot_cpu_data.x86 == 0x10)
800 debugf1(" DCT 128bit mode width: %s\n",
801 (dclr & BIT(11)) ? "128b" : "64b");
803 debugf1(" x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
804 (dclr & BIT(12)) ? "yes" : "no",
805 (dclr & BIT(13)) ? "yes" : "no",
806 (dclr & BIT(14)) ? "yes" : "no",
807 (dclr & BIT(15)) ? "yes" : "no");
810 /* Display and decode various NB registers for debug purposes. */
811 static void dump_misc_regs(struct amd64_pvt *pvt)
813 debugf1("F3xE8 (NB Cap): 0x%08x\n", pvt->nbcap);
815 debugf1(" NB two channel DRAM capable: %s\n",
816 (pvt->nbcap & NBCAP_DCT_DUAL) ? "yes" : "no");
818 debugf1(" ECC capable: %s, ChipKill ECC capable: %s\n",
819 (pvt->nbcap & NBCAP_SECDED) ? "yes" : "no",
820 (pvt->nbcap & NBCAP_CHIPKILL) ? "yes" : "no");
822 amd64_dump_dramcfg_low(pvt->dclr0, 0);
824 debugf1("F3xB0 (Online Spare): 0x%08x\n", pvt->online_spare);
826 debugf1("F1xF0 (DRAM Hole Address): 0x%08x, base: 0x%08x, "
828 pvt->dhar, dhar_base(pvt),
829 (boot_cpu_data.x86 == 0xf) ? k8_dhar_offset(pvt)
830 : f10_dhar_offset(pvt));
832 debugf1(" DramHoleValid: %s\n", dhar_valid(pvt) ? "yes" : "no");
834 amd64_debug_display_dimm_sizes(pvt, 0);
836 /* everything below this point is Fam10h and above */
837 if (boot_cpu_data.x86 == 0xf)
840 amd64_debug_display_dimm_sizes(pvt, 1);
842 amd64_info("using %s syndromes.\n", ((pvt->ecc_sym_sz == 8) ? "x8" : "x4"));
844 /* Only if NOT ganged does dclr1 have valid info */
845 if (!dct_ganging_enabled(pvt))
846 amd64_dump_dramcfg_low(pvt->dclr1, 1);
850 * see BKDG, F2x[1,0][5C:40], F2[1,0][6C:60]
852 static void prep_chip_selects(struct amd64_pvt *pvt)
854 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
855 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
856 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
858 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
859 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
864 * Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
866 static void read_dct_base_mask(struct amd64_pvt *pvt)
870 prep_chip_selects(pvt);
872 for_each_chip_select(cs, 0, pvt) {
873 int reg0 = DCSB0 + (cs * 4);
874 int reg1 = DCSB1 + (cs * 4);
875 u32 *base0 = &pvt->csels[0].csbases[cs];
876 u32 *base1 = &pvt->csels[1].csbases[cs];
878 if (!amd64_read_dct_pci_cfg(pvt, reg0, base0))
879 debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
882 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
885 if (!amd64_read_dct_pci_cfg(pvt, reg1, base1))
886 debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
890 for_each_chip_select_mask(cs, 0, pvt) {
891 int reg0 = DCSM0 + (cs * 4);
892 int reg1 = DCSM1 + (cs * 4);
893 u32 *mask0 = &pvt->csels[0].csmasks[cs];
894 u32 *mask1 = &pvt->csels[1].csmasks[cs];
896 if (!amd64_read_dct_pci_cfg(pvt, reg0, mask0))
897 debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
900 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
903 if (!amd64_read_dct_pci_cfg(pvt, reg1, mask1))
904 debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
909 static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
913 /* F15h supports only DDR3 */
914 if (boot_cpu_data.x86 >= 0x15)
915 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
916 else if (boot_cpu_data.x86 == 0x10 || pvt->ext_model >= K8_REV_F) {
917 if (pvt->dchr0 & DDR3_MODE)
918 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
920 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
922 type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
925 amd64_info("CS%d: %s\n", cs, edac_mem_types[type]);
930 /* Get the number of DCT channels the memory controller is using. */
931 static int k8_early_channel_count(struct amd64_pvt *pvt)
935 if (pvt->ext_model >= K8_REV_F)
936 /* RevF (NPT) and later */
937 flag = pvt->dclr0 & WIDTH_128;
939 /* RevE and earlier */
940 flag = pvt->dclr0 & REVE_WIDTH_128;
945 return (flag) ? 2 : 1;
948 /* On F10h and later ErrAddr is MC4_ADDR[47:1] */
949 static u64 get_error_address(struct mce *m)
951 struct cpuinfo_x86 *c = &boot_cpu_data;
961 addr = m->addr & GENMASK(start_bit, end_bit);
964 * Erratum 637 workaround
966 if (c->x86 == 0x15) {
967 struct amd64_pvt *pvt;
968 u64 cc6_base, tmp_addr;
970 u8 mce_nid, intlv_en;
972 if ((addr & GENMASK(24, 47)) >> 24 != 0x00fdf7)
975 mce_nid = amd_get_nb_id(m->extcpu);
976 pvt = mcis[mce_nid]->pvt_info;
978 amd64_read_pci_cfg(pvt->F1, DRAM_LOCAL_NODE_LIM, &tmp);
979 intlv_en = tmp >> 21 & 0x7;
981 /* add [47:27] + 3 trailing bits */
982 cc6_base = (tmp & GENMASK(0, 20)) << 3;
984 /* reverse and add DramIntlvEn */
985 cc6_base |= intlv_en ^ 0x7;
991 return cc6_base | (addr & GENMASK(0, 23));
993 amd64_read_pci_cfg(pvt->F1, DRAM_LOCAL_NODE_BASE, &tmp);
996 tmp_addr = (addr & GENMASK(12, 23)) << __fls(intlv_en + 1);
998 /* OR DramIntlvSel into bits [14:12] */
999 tmp_addr |= (tmp & GENMASK(21, 23)) >> 9;
1001 /* add remaining [11:0] bits from original MC4_ADDR */
1002 tmp_addr |= addr & GENMASK(0, 11);
1004 return cc6_base | tmp_addr;
1010 static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
1012 struct cpuinfo_x86 *c = &boot_cpu_data;
1013 int off = range << 3;
1015 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off, &pvt->ranges[range].base.lo);
1016 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off, &pvt->ranges[range].lim.lo);
1021 if (!dram_rw(pvt, range))
1024 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off, &pvt->ranges[range].base.hi);
1025 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off, &pvt->ranges[range].lim.hi);
1027 /* Factor in CC6 save area by reading dst node's limit reg */
1028 if (c->x86 == 0x15) {
1029 struct pci_dev *f1 = NULL;
1030 u8 nid = dram_dst_node(pvt, range);
1033 f1 = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0x18 + nid, 1));
1037 amd64_read_pci_cfg(f1, DRAM_LOCAL_NODE_LIM, &llim);
1039 pvt->ranges[range].lim.lo &= GENMASK(0, 15);
1041 /* {[39:27],111b} */
1042 pvt->ranges[range].lim.lo |= ((llim & 0x1fff) << 3 | 0x7) << 16;
1044 pvt->ranges[range].lim.hi &= GENMASK(0, 7);
1047 pvt->ranges[range].lim.hi |= llim >> 13;
1053 static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
1056 struct mem_ctl_info *src_mci;
1057 struct amd64_pvt *pvt = mci->pvt_info;
1061 /* CHIPKILL enabled */
1062 if (pvt->nbcfg & NBCFG_CHIPKILL) {
1063 channel = get_channel_from_ecc_syndrome(mci, syndrome);
1066 * Syndrome didn't map, so we don't know which of the
1067 * 2 DIMMs is in error. So we need to ID 'both' of them
1070 amd64_mc_warn(mci, "unknown syndrome 0x%04x - possible "
1071 "error reporting race\n", syndrome);
1072 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1077 * non-chipkill ecc mode
1079 * The k8 documentation is unclear about how to determine the
1080 * channel number when using non-chipkill memory. This method
1081 * was obtained from email communication with someone at AMD.
1082 * (Wish the email was placed in this comment - norsk)
1084 channel = ((sys_addr & BIT(3)) != 0);
1088 * Find out which node the error address belongs to. This may be
1089 * different from the node that detected the error.
1091 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1093 amd64_mc_err(mci, "failed to map error addr 0x%lx to a node\n",
1094 (unsigned long)sys_addr);
1095 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1099 /* Now map the sys_addr to a CSROW */
1100 csrow = sys_addr_to_csrow(src_mci, sys_addr);
1102 edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR);
1104 error_address_to_page_and_offset(sys_addr, &page, &offset);
1106 edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow,
1107 channel, EDAC_MOD_STR);
1111 static int ddr2_cs_size(unsigned i, bool dct_width)
1117 else if (!(i & 0x1))
1120 shift = (i + 1) >> 1;
1122 return 128 << (shift + !!dct_width);
1125 static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1128 u32 dclr = dct ? pvt->dclr1 : pvt->dclr0;
1130 if (pvt->ext_model >= K8_REV_F) {
1131 WARN_ON(cs_mode > 11);
1132 return ddr2_cs_size(cs_mode, dclr & WIDTH_128);
1134 else if (pvt->ext_model >= K8_REV_D) {
1135 WARN_ON(cs_mode > 10);
1137 if (cs_mode == 3 || cs_mode == 8)
1138 return 32 << (cs_mode - 1);
1140 return 32 << cs_mode;
1143 WARN_ON(cs_mode > 6);
1144 return 32 << cs_mode;
1149 * Get the number of DCT channels in use.
1152 * number of Memory Channels in operation
1154 * contents of the DCL0_LOW register
1156 static int f1x_early_channel_count(struct amd64_pvt *pvt)
1158 int i, j, channels = 0;
1160 /* On F10h, if we are in 128 bit mode, then we are using 2 channels */
1161 if (boot_cpu_data.x86 == 0x10 && (pvt->dclr0 & WIDTH_128))
1165 * Need to check if in unganged mode: In such, there are 2 channels,
1166 * but they are not in 128 bit mode and thus the above 'dclr0' status
1169 * Need to check DCT0[0] and DCT1[0] to see if only one of them has
1170 * their CSEnable bit on. If so, then SINGLE DIMM case.
1172 debugf0("Data width is not 128 bits - need more decoding\n");
1175 * Check DRAM Bank Address Mapping values for each DIMM to see if there
1176 * is more than just one DIMM present in unganged mode. Need to check
1177 * both controllers since DIMMs can be placed in either one.
1179 for (i = 0; i < 2; i++) {
1180 u32 dbam = (i ? pvt->dbam1 : pvt->dbam0);
1182 for (j = 0; j < 4; j++) {
1183 if (DBAM_DIMM(j, dbam) > 0) {
1193 amd64_info("MCT channel count: %d\n", channels);
1198 static int ddr3_cs_size(unsigned i, bool dct_width)
1203 if (i == 0 || i == 3 || i == 4)
1209 else if (!(i & 0x1))
1212 shift = (i + 1) >> 1;
1215 cs_size = (128 * (1 << !!dct_width)) << shift;
1220 static int f10_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1223 u32 dclr = dct ? pvt->dclr1 : pvt->dclr0;
1225 WARN_ON(cs_mode > 11);
1227 if (pvt->dchr0 & DDR3_MODE || pvt->dchr1 & DDR3_MODE)
1228 return ddr3_cs_size(cs_mode, dclr & WIDTH_128);
1230 return ddr2_cs_size(cs_mode, dclr & WIDTH_128);
1234 * F15h supports only 64bit DCT interfaces
1236 static int f15_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
1239 WARN_ON(cs_mode > 12);
1241 return ddr3_cs_size(cs_mode, false);
1244 static void read_dram_ctl_register(struct amd64_pvt *pvt)
1247 if (boot_cpu_data.x86 == 0xf)
1250 if (!amd64_read_dct_pci_cfg(pvt, DCT_SEL_LO, &pvt->dct_sel_lo)) {
1251 debugf0("F2x110 (DCTSelLow): 0x%08x, High range addrs at: 0x%x\n",
1252 pvt->dct_sel_lo, dct_sel_baseaddr(pvt));
1254 debugf0(" DCTs operate in %s mode.\n",
1255 (dct_ganging_enabled(pvt) ? "ganged" : "unganged"));
1257 if (!dct_ganging_enabled(pvt))
1258 debugf0(" Address range split per DCT: %s\n",
1259 (dct_high_range_enabled(pvt) ? "yes" : "no"));
1261 debugf0(" data interleave for ECC: %s, "
1262 "DRAM cleared since last warm reset: %s\n",
1263 (dct_data_intlv_enabled(pvt) ? "enabled" : "disabled"),
1264 (dct_memory_cleared(pvt) ? "yes" : "no"));
1266 debugf0(" channel interleave: %s, "
1267 "interleave bits selector: 0x%x\n",
1268 (dct_interleave_enabled(pvt) ? "enabled" : "disabled"),
1269 dct_sel_interleave_addr(pvt));
1272 amd64_read_dct_pci_cfg(pvt, DCT_SEL_HI, &pvt->dct_sel_hi);
1276 * Determine channel (DCT) based on the interleaving mode: F10h BKDG, 2.8.9 Memory
1277 * Interleaving Modes.
1279 static u8 f1x_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
1280 bool hi_range_sel, u8 intlv_en)
1282 u8 dct_sel_high = (pvt->dct_sel_lo >> 1) & 1;
1284 if (dct_ganging_enabled(pvt))
1288 return dct_sel_high;
1291 * see F2x110[DctSelIntLvAddr] - channel interleave mode
1293 if (dct_interleave_enabled(pvt)) {
1294 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1296 /* return DCT select function: 0=DCT0, 1=DCT1 */
1298 return sys_addr >> 6 & 1;
1300 if (intlv_addr & 0x2) {
1301 u8 shift = intlv_addr & 0x1 ? 9 : 6;
1302 u32 temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) % 2;
1304 return ((sys_addr >> shift) & 1) ^ temp;
1307 return (sys_addr >> (12 + hweight8(intlv_en))) & 1;
1310 if (dct_high_range_enabled(pvt))
1311 return ~dct_sel_high & 1;
1316 /* Convert the sys_addr to the normalized DCT address */
1317 static u64 f1x_get_norm_dct_addr(struct amd64_pvt *pvt, unsigned range,
1318 u64 sys_addr, bool hi_rng,
1319 u32 dct_sel_base_addr)
1322 u64 dram_base = get_dram_base(pvt, range);
1323 u64 hole_off = f10_dhar_offset(pvt);
1324 u64 dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
1329 * base address of high range is below 4Gb
1330 * (bits [47:27] at [31:11])
1331 * DRAM address space on this DCT is hoisted above 4Gb &&
1334 * remove hole offset from sys_addr
1336 * remove high range offset from sys_addr
1338 if ((!(dct_sel_base_addr >> 16) ||
1339 dct_sel_base_addr < dhar_base(pvt)) &&
1341 (sys_addr >= BIT_64(32)))
1342 chan_off = hole_off;
1344 chan_off = dct_sel_base_off;
1348 * we have a valid hole &&
1353 * remove dram base to normalize to DCT address
1355 if (dhar_valid(pvt) && (sys_addr >= BIT_64(32)))
1356 chan_off = hole_off;
1358 chan_off = dram_base;
1361 return (sys_addr & GENMASK(6,47)) - (chan_off & GENMASK(23,47));
1365 * checks if the csrow passed in is marked as SPARED, if so returns the new
1368 static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
1372 if (online_spare_swap_done(pvt, dct) &&
1373 csrow == online_spare_bad_dramcs(pvt, dct)) {
1375 for_each_chip_select(tmp_cs, dct, pvt) {
1376 if (chip_select_base(tmp_cs, dct, pvt) & 0x2) {
1386 * Iterate over the DRAM DCT "base" and "mask" registers looking for a
1387 * SystemAddr match on the specified 'ChannelSelect' and 'NodeID'
1390 * -EINVAL: NOT FOUND
1391 * 0..csrow = Chip-Select Row
1393 static int f1x_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct)
1395 struct mem_ctl_info *mci;
1396 struct amd64_pvt *pvt;
1397 u64 cs_base, cs_mask;
1398 int cs_found = -EINVAL;
1405 pvt = mci->pvt_info;
1407 debugf1("input addr: 0x%llx, DCT: %d\n", in_addr, dct);
1409 for_each_chip_select(csrow, dct, pvt) {
1410 if (!csrow_enabled(csrow, dct, pvt))
1413 get_cs_base_and_mask(pvt, csrow, dct, &cs_base, &cs_mask);
1415 debugf1(" CSROW=%d CSBase=0x%llx CSMask=0x%llx\n",
1416 csrow, cs_base, cs_mask);
1420 debugf1(" (InputAddr & ~CSMask)=0x%llx "
1421 "(CSBase & ~CSMask)=0x%llx\n",
1422 (in_addr & cs_mask), (cs_base & cs_mask));
1424 if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
1425 cs_found = f10_process_possible_spare(pvt, dct, csrow);
1427 debugf1(" MATCH csrow=%d\n", cs_found);
1435 * See F2x10C. Non-interleaved graphics framebuffer memory under the 16G is
1436 * swapped with a region located at the bottom of memory so that the GPU can use
1437 * the interleaved region and thus two channels.
1439 static u64 f1x_swap_interleaved_region(struct amd64_pvt *pvt, u64 sys_addr)
1441 u32 swap_reg, swap_base, swap_limit, rgn_size, tmp_addr;
1443 if (boot_cpu_data.x86 == 0x10) {
1444 /* only revC3 and revE have that feature */
1445 if (boot_cpu_data.x86_model < 4 ||
1446 (boot_cpu_data.x86_model < 0xa &&
1447 boot_cpu_data.x86_mask < 3))
1451 amd64_read_dct_pci_cfg(pvt, SWAP_INTLV_REG, &swap_reg);
1453 if (!(swap_reg & 0x1))
1456 swap_base = (swap_reg >> 3) & 0x7f;
1457 swap_limit = (swap_reg >> 11) & 0x7f;
1458 rgn_size = (swap_reg >> 20) & 0x7f;
1459 tmp_addr = sys_addr >> 27;
1461 if (!(sys_addr >> 34) &&
1462 (((tmp_addr >= swap_base) &&
1463 (tmp_addr <= swap_limit)) ||
1464 (tmp_addr < rgn_size)))
1465 return sys_addr ^ (u64)swap_base << 27;
1470 /* For a given @dram_range, check if @sys_addr falls within it. */
1471 static int f1x_match_to_this_node(struct amd64_pvt *pvt, unsigned range,
1472 u64 sys_addr, int *nid, int *chan_sel)
1474 int cs_found = -EINVAL;
1478 bool high_range = false;
1480 u8 node_id = dram_dst_node(pvt, range);
1481 u8 intlv_en = dram_intlv_en(pvt, range);
1482 u32 intlv_sel = dram_intlv_sel(pvt, range);
1484 debugf1("(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
1485 range, sys_addr, get_dram_limit(pvt, range));
1487 if (dhar_valid(pvt) &&
1488 dhar_base(pvt) <= sys_addr &&
1489 sys_addr < BIT_64(32)) {
1490 amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
1495 if (intlv_en && (intlv_sel != ((sys_addr >> 12) & intlv_en)))
1498 sys_addr = f1x_swap_interleaved_region(pvt, sys_addr);
1500 dct_sel_base = dct_sel_baseaddr(pvt);
1503 * check whether addresses >= DctSelBaseAddr[47:27] are to be used to
1504 * select between DCT0 and DCT1.
1506 if (dct_high_range_enabled(pvt) &&
1507 !dct_ganging_enabled(pvt) &&
1508 ((sys_addr >> 27) >= (dct_sel_base >> 11)))
1511 channel = f1x_determine_channel(pvt, sys_addr, high_range, intlv_en);
1513 chan_addr = f1x_get_norm_dct_addr(pvt, range, sys_addr,
1514 high_range, dct_sel_base);
1516 /* Remove node interleaving, see F1x120 */
1518 chan_addr = ((chan_addr >> (12 + hweight8(intlv_en))) << 12) |
1519 (chan_addr & 0xfff);
1521 /* remove channel interleave */
1522 if (dct_interleave_enabled(pvt) &&
1523 !dct_high_range_enabled(pvt) &&
1524 !dct_ganging_enabled(pvt)) {
1526 if (dct_sel_interleave_addr(pvt) != 1) {
1527 if (dct_sel_interleave_addr(pvt) == 0x3)
1529 chan_addr = ((chan_addr >> 10) << 9) |
1530 (chan_addr & 0x1ff);
1532 /* A[6] or hash 6 */
1533 chan_addr = ((chan_addr >> 7) << 6) |
1537 chan_addr = ((chan_addr >> 13) << 12) |
1538 (chan_addr & 0xfff);
1541 debugf1(" Normalized DCT addr: 0x%llx\n", chan_addr);
1543 cs_found = f1x_lookup_addr_in_dct(chan_addr, node_id, channel);
1545 if (cs_found >= 0) {
1547 *chan_sel = channel;
1552 static int f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
1553 int *node, int *chan_sel)
1555 int cs_found = -EINVAL;
1558 for (range = 0; range < DRAM_RANGES; range++) {
1560 if (!dram_rw(pvt, range))
1563 if ((get_dram_base(pvt, range) <= sys_addr) &&
1564 (get_dram_limit(pvt, range) >= sys_addr)) {
1566 cs_found = f1x_match_to_this_node(pvt, range,
1577 * For reference see "2.8.5 Routing DRAM Requests" in F10 BKDG. This code maps
1578 * a @sys_addr to NodeID, DCT (channel) and chip select (CSROW).
1580 * The @sys_addr is usually an error address received from the hardware
1583 static void f1x_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
1586 struct amd64_pvt *pvt = mci->pvt_info;
1588 int nid, csrow, chan = 0;
1590 csrow = f1x_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
1593 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1597 error_address_to_page_and_offset(sys_addr, &page, &offset);
1600 * We need the syndromes for channel detection only when we're
1601 * ganged. Otherwise @chan should already contain the channel at
1604 if (dct_ganging_enabled(pvt))
1605 chan = get_channel_from_ecc_syndrome(mci, syndrome);
1608 edac_mc_handle_ce(mci, page, offset, syndrome, csrow, chan,
1612 * Channel unknown, report all channels on this CSROW as failed.
1614 for (chan = 0; chan < mci->csrows[csrow].nr_channels; chan++)
1615 edac_mc_handle_ce(mci, page, offset, syndrome,
1616 csrow, chan, EDAC_MOD_STR);
1620 * debug routine to display the memory sizes of all logical DIMMs and its
1623 static void amd64_debug_display_dimm_sizes(struct amd64_pvt *pvt, u8 ctrl)
1625 int dimm, size0, size1, factor = 0;
1626 u32 *dcsb = ctrl ? pvt->csels[1].csbases : pvt->csels[0].csbases;
1627 u32 dbam = ctrl ? pvt->dbam1 : pvt->dbam0;
1629 if (boot_cpu_data.x86 == 0xf) {
1630 if (pvt->dclr0 & WIDTH_128)
1633 /* K8 families < revF not supported yet */
1634 if (pvt->ext_model < K8_REV_F)
1640 dbam = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->dbam1 : pvt->dbam0;
1641 dcsb = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->csels[1].csbases
1642 : pvt->csels[0].csbases;
1644 debugf1("F2x%d80 (DRAM Bank Address Mapping): 0x%08x\n", ctrl, dbam);
1646 edac_printk(KERN_DEBUG, EDAC_MC, "DCT%d chip selects:\n", ctrl);
1648 /* Dump memory sizes for DIMM and its CSROWs */
1649 for (dimm = 0; dimm < 4; dimm++) {
1652 if (dcsb[dimm*2] & DCSB_CS_ENABLE)
1653 size0 = pvt->ops->dbam_to_cs(pvt, ctrl,
1654 DBAM_DIMM(dimm, dbam));
1657 if (dcsb[dimm*2 + 1] & DCSB_CS_ENABLE)
1658 size1 = pvt->ops->dbam_to_cs(pvt, ctrl,
1659 DBAM_DIMM(dimm, dbam));
1661 amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
1662 dimm * 2, size0 << factor,
1663 dimm * 2 + 1, size1 << factor);
1667 static struct amd64_family_type amd64_family_types[] = {
1670 .f1_id = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
1671 .f3_id = PCI_DEVICE_ID_AMD_K8_NB_MISC,
1673 .early_channel_count = k8_early_channel_count,
1674 .map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
1675 .dbam_to_cs = k8_dbam_to_chip_select,
1676 .read_dct_pci_cfg = k8_read_dct_pci_cfg,
1681 .f1_id = PCI_DEVICE_ID_AMD_10H_NB_MAP,
1682 .f3_id = PCI_DEVICE_ID_AMD_10H_NB_MISC,
1684 .early_channel_count = f1x_early_channel_count,
1685 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
1686 .dbam_to_cs = f10_dbam_to_chip_select,
1687 .read_dct_pci_cfg = f10_read_dct_pci_cfg,
1692 .f1_id = PCI_DEVICE_ID_AMD_15H_NB_F1,
1693 .f3_id = PCI_DEVICE_ID_AMD_15H_NB_F3,
1695 .early_channel_count = f1x_early_channel_count,
1696 .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
1697 .dbam_to_cs = f15_dbam_to_chip_select,
1698 .read_dct_pci_cfg = f15_read_dct_pci_cfg,
1703 static struct pci_dev *pci_get_related_function(unsigned int vendor,
1704 unsigned int device,
1705 struct pci_dev *related)
1707 struct pci_dev *dev = NULL;
1709 dev = pci_get_device(vendor, device, dev);
1711 if ((dev->bus->number == related->bus->number) &&
1712 (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
1714 dev = pci_get_device(vendor, device, dev);
1721 * These are tables of eigenvectors (one per line) which can be used for the
1722 * construction of the syndrome tables. The modified syndrome search algorithm
1723 * uses those to find the symbol in error and thus the DIMM.
1725 * Algorithm courtesy of Ross LaFetra from AMD.
1727 static u16 x4_vectors[] = {
1728 0x2f57, 0x1afe, 0x66cc, 0xdd88,
1729 0x11eb, 0x3396, 0x7f4c, 0xeac8,
1730 0x0001, 0x0002, 0x0004, 0x0008,
1731 0x1013, 0x3032, 0x4044, 0x8088,
1732 0x106b, 0x30d6, 0x70fc, 0xe0a8,
1733 0x4857, 0xc4fe, 0x13cc, 0x3288,
1734 0x1ac5, 0x2f4a, 0x5394, 0xa1e8,
1735 0x1f39, 0x251e, 0xbd6c, 0x6bd8,
1736 0x15c1, 0x2a42, 0x89ac, 0x4758,
1737 0x2b03, 0x1602, 0x4f0c, 0xca08,
1738 0x1f07, 0x3a0e, 0x6b04, 0xbd08,
1739 0x8ba7, 0x465e, 0x244c, 0x1cc8,
1740 0x2b87, 0x164e, 0x642c, 0xdc18,
1741 0x40b9, 0x80de, 0x1094, 0x20e8,
1742 0x27db, 0x1eb6, 0x9dac, 0x7b58,
1743 0x11c1, 0x2242, 0x84ac, 0x4c58,
1744 0x1be5, 0x2d7a, 0x5e34, 0xa718,
1745 0x4b39, 0x8d1e, 0x14b4, 0x28d8,
1746 0x4c97, 0xc87e, 0x11fc, 0x33a8,
1747 0x8e97, 0x497e, 0x2ffc, 0x1aa8,
1748 0x16b3, 0x3d62, 0x4f34, 0x8518,
1749 0x1e2f, 0x391a, 0x5cac, 0xf858,
1750 0x1d9f, 0x3b7a, 0x572c, 0xfe18,
1751 0x15f5, 0x2a5a, 0x5264, 0xa3b8,
1752 0x1dbb, 0x3b66, 0x715c, 0xe3f8,
1753 0x4397, 0xc27e, 0x17fc, 0x3ea8,
1754 0x1617, 0x3d3e, 0x6464, 0xb8b8,
1755 0x23ff, 0x12aa, 0xab6c, 0x56d8,
1756 0x2dfb, 0x1ba6, 0x913c, 0x7328,
1757 0x185d, 0x2ca6, 0x7914, 0x9e28,
1758 0x171b, 0x3e36, 0x7d7c, 0xebe8,
1759 0x4199, 0x82ee, 0x19f4, 0x2e58,
1760 0x4807, 0xc40e, 0x130c, 0x3208,
1761 0x1905, 0x2e0a, 0x5804, 0xac08,
1762 0x213f, 0x132a, 0xadfc, 0x5ba8,
1763 0x19a9, 0x2efe, 0xb5cc, 0x6f88,
1766 static u16 x8_vectors[] = {
1767 0x0145, 0x028a, 0x2374, 0x43c8, 0xa1f0, 0x0520, 0x0a40, 0x1480,
1768 0x0211, 0x0422, 0x0844, 0x1088, 0x01b0, 0x44e0, 0x23c0, 0xed80,
1769 0x1011, 0x0116, 0x022c, 0x0458, 0x08b0, 0x8c60, 0x2740, 0x4e80,
1770 0x0411, 0x0822, 0x1044, 0x0158, 0x02b0, 0x2360, 0x46c0, 0xab80,
1771 0x0811, 0x1022, 0x012c, 0x0258, 0x04b0, 0x4660, 0x8cc0, 0x2780,
1772 0x2071, 0x40e2, 0xa0c4, 0x0108, 0x0210, 0x0420, 0x0840, 0x1080,
1773 0x4071, 0x80e2, 0x0104, 0x0208, 0x0410, 0x0820, 0x1040, 0x2080,
1774 0x8071, 0x0102, 0x0204, 0x0408, 0x0810, 0x1020, 0x2040, 0x4080,
1775 0x019d, 0x03d6, 0x136c, 0x2198, 0x50b0, 0xb2e0, 0x0740, 0x0e80,
1776 0x0189, 0x03ea, 0x072c, 0x0e58, 0x1cb0, 0x56e0, 0x37c0, 0xf580,
1777 0x01fd, 0x0376, 0x06ec, 0x0bb8, 0x1110, 0x2220, 0x4440, 0x8880,
1778 0x0163, 0x02c6, 0x1104, 0x0758, 0x0eb0, 0x2be0, 0x6140, 0xc280,
1779 0x02fd, 0x01c6, 0x0b5c, 0x1108, 0x07b0, 0x25a0, 0x8840, 0x6180,
1780 0x0801, 0x012e, 0x025c, 0x04b8, 0x1370, 0x26e0, 0x57c0, 0xb580,
1781 0x0401, 0x0802, 0x015c, 0x02b8, 0x22b0, 0x13e0, 0x7140, 0xe280,
1782 0x0201, 0x0402, 0x0804, 0x01b8, 0x11b0, 0x31a0, 0x8040, 0x7180,
1783 0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080,
1784 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
1785 0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000,
1788 static int decode_syndrome(u16 syndrome, u16 *vectors, unsigned num_vecs,
1791 unsigned int i, err_sym;
1793 for (err_sym = 0; err_sym < num_vecs / v_dim; err_sym++) {
1795 unsigned v_idx = err_sym * v_dim;
1796 unsigned v_end = (err_sym + 1) * v_dim;
1798 /* walk over all 16 bits of the syndrome */
1799 for (i = 1; i < (1U << 16); i <<= 1) {
1801 /* if bit is set in that eigenvector... */
1802 if (v_idx < v_end && vectors[v_idx] & i) {
1803 u16 ev_comp = vectors[v_idx++];
1805 /* ... and bit set in the modified syndrome, */
1815 /* can't get to zero, move to next symbol */
1820 debugf0("syndrome(%x) not found\n", syndrome);
1824 static int map_err_sym_to_channel(int err_sym, int sym_size)
1837 return err_sym >> 4;
1843 /* imaginary bits not in a DIMM */
1845 WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
1857 return err_sym >> 3;
1863 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
1865 struct amd64_pvt *pvt = mci->pvt_info;
1868 if (pvt->ecc_sym_sz == 8)
1869 err_sym = decode_syndrome(syndrome, x8_vectors,
1870 ARRAY_SIZE(x8_vectors),
1872 else if (pvt->ecc_sym_sz == 4)
1873 err_sym = decode_syndrome(syndrome, x4_vectors,
1874 ARRAY_SIZE(x4_vectors),
1877 amd64_warn("Illegal syndrome type: %u\n", pvt->ecc_sym_sz);
1881 return map_err_sym_to_channel(err_sym, pvt->ecc_sym_sz);
1885 * Handle any Correctable Errors (CEs) that have occurred. Check for valid ERROR
1886 * ADDRESS and process.
1888 static void amd64_handle_ce(struct mem_ctl_info *mci, struct mce *m)
1890 struct amd64_pvt *pvt = mci->pvt_info;
1894 /* Ensure that the Error Address is VALID */
1895 if (!(m->status & MCI_STATUS_ADDRV)) {
1896 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1897 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1901 sys_addr = get_error_address(m);
1902 syndrome = extract_syndrome(m->status);
1904 amd64_mc_err(mci, "CE ERROR_ADDRESS= 0x%llx\n", sys_addr);
1906 pvt->ops->map_sysaddr_to_csrow(mci, sys_addr, syndrome);
1909 /* Handle any Un-correctable Errors (UEs) */
1910 static void amd64_handle_ue(struct mem_ctl_info *mci, struct mce *m)
1912 struct mem_ctl_info *log_mci, *src_mci = NULL;
1919 if (!(m->status & MCI_STATUS_ADDRV)) {
1920 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1921 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1925 sys_addr = get_error_address(m);
1928 * Find out which node the error address belongs to. This may be
1929 * different from the node that detected the error.
1931 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1933 amd64_mc_err(mci, "ERROR ADDRESS (0x%lx) NOT mapped to a MC\n",
1934 (unsigned long)sys_addr);
1935 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1941 csrow = sys_addr_to_csrow(log_mci, sys_addr);
1943 amd64_mc_err(mci, "ERROR_ADDRESS (0x%lx) NOT mapped to CS\n",
1944 (unsigned long)sys_addr);
1945 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1947 error_address_to_page_and_offset(sys_addr, &page, &offset);
1948 edac_mc_handle_ue(log_mci, page, offset, csrow, EDAC_MOD_STR);
1952 static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
1955 u16 ec = EC(m->status);
1956 u8 xec = XEC(m->status, 0x1f);
1957 u8 ecc_type = (m->status >> 45) & 0x3;
1959 /* Bail early out if this was an 'observed' error */
1960 if (PP(ec) == NBSL_PP_OBS)
1963 /* Do only ECC errors */
1964 if (xec && xec != F10_NBSL_EXT_ERR_ECC)
1968 amd64_handle_ce(mci, m);
1969 else if (ecc_type == 1)
1970 amd64_handle_ue(mci, m);
1973 void amd64_decode_bus_error(int node_id, struct mce *m)
1975 __amd64_decode_bus_error(mcis[node_id], m);
1979 * Use pvt->F2 which contains the F2 CPU PCI device to get the related
1980 * F1 (AddrMap) and F3 (Misc) devices. Return negative value on error.
1982 static int reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 f1_id, u16 f3_id)
1984 /* Reserve the ADDRESS MAP Device */
1985 pvt->F1 = pci_get_related_function(pvt->F2->vendor, f1_id, pvt->F2);
1987 amd64_err("error address map device not found: "
1988 "vendor %x device 0x%x (broken BIOS?)\n",
1989 PCI_VENDOR_ID_AMD, f1_id);
1993 /* Reserve the MISC Device */
1994 pvt->F3 = pci_get_related_function(pvt->F2->vendor, f3_id, pvt->F2);
1996 pci_dev_put(pvt->F1);
1999 amd64_err("error F3 device not found: "
2000 "vendor %x device 0x%x (broken BIOS?)\n",
2001 PCI_VENDOR_ID_AMD, f3_id);
2005 debugf1("F1: %s\n", pci_name(pvt->F1));
2006 debugf1("F2: %s\n", pci_name(pvt->F2));
2007 debugf1("F3: %s\n", pci_name(pvt->F3));
2012 static void free_mc_sibling_devs(struct amd64_pvt *pvt)
2014 pci_dev_put(pvt->F1);
2015 pci_dev_put(pvt->F3);
2019 * Retrieve the hardware registers of the memory controller (this includes the
2020 * 'Address Map' and 'Misc' device regs)
2022 static void read_mc_regs(struct amd64_pvt *pvt)
2024 struct cpuinfo_x86 *c = &boot_cpu_data;
2030 * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since
2031 * those are Read-As-Zero
2033 rdmsrl(MSR_K8_TOP_MEM1, pvt->top_mem);
2034 debugf0(" TOP_MEM: 0x%016llx\n", pvt->top_mem);
2036 /* check first whether TOP_MEM2 is enabled */
2037 rdmsrl(MSR_K8_SYSCFG, msr_val);
2038 if (msr_val & (1U << 21)) {
2039 rdmsrl(MSR_K8_TOP_MEM2, pvt->top_mem2);
2040 debugf0(" TOP_MEM2: 0x%016llx\n", pvt->top_mem2);
2042 debugf0(" TOP_MEM2 disabled.\n");
2044 amd64_read_pci_cfg(pvt->F3, NBCAP, &pvt->nbcap);
2046 read_dram_ctl_register(pvt);
2048 for (range = 0; range < DRAM_RANGES; range++) {
2051 /* read settings for this DRAM range */
2052 read_dram_base_limit_regs(pvt, range);
2054 rw = dram_rw(pvt, range);
2058 debugf1(" DRAM range[%d], base: 0x%016llx; limit: 0x%016llx\n",
2060 get_dram_base(pvt, range),
2061 get_dram_limit(pvt, range));
2063 debugf1(" IntlvEn=%s; Range access: %s%s IntlvSel=%d DstNode=%d\n",
2064 dram_intlv_en(pvt, range) ? "Enabled" : "Disabled",
2065 (rw & 0x1) ? "R" : "-",
2066 (rw & 0x2) ? "W" : "-",
2067 dram_intlv_sel(pvt, range),
2068 dram_dst_node(pvt, range));
2071 read_dct_base_mask(pvt);
2073 amd64_read_pci_cfg(pvt->F1, DHAR, &pvt->dhar);
2074 amd64_read_dct_pci_cfg(pvt, DBAM0, &pvt->dbam0);
2076 amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
2078 amd64_read_dct_pci_cfg(pvt, DCLR0, &pvt->dclr0);
2079 amd64_read_dct_pci_cfg(pvt, DCHR0, &pvt->dchr0);
2081 if (!dct_ganging_enabled(pvt)) {
2082 amd64_read_dct_pci_cfg(pvt, DCLR1, &pvt->dclr1);
2083 amd64_read_dct_pci_cfg(pvt, DCHR1, &pvt->dchr1);
2086 pvt->ecc_sym_sz = 4;
2088 if (c->x86 >= 0x10) {
2089 amd64_read_pci_cfg(pvt->F3, EXT_NB_MCA_CFG, &tmp);
2090 amd64_read_dct_pci_cfg(pvt, DBAM1, &pvt->dbam1);
2092 /* F10h, revD and later can do x8 ECC too */
2093 if ((c->x86 > 0x10 || c->x86_model > 7) && tmp & BIT(25))
2094 pvt->ecc_sym_sz = 8;
2096 dump_misc_regs(pvt);
2100 * NOTE: CPU Revision Dependent code
2103 * @csrow_nr ChipSelect Row Number (0..NUM_CHIPSELECTS-1)
2104 * k8 private pointer to -->
2105 * DRAM Bank Address mapping register
2107 * DCL register where dual_channel_active is
2109 * The DBAM register consists of 4 sets of 4 bits each definitions:
2112 * 0-3 CSROWs 0 and 1
2113 * 4-7 CSROWs 2 and 3
2114 * 8-11 CSROWs 4 and 5
2115 * 12-15 CSROWs 6 and 7
2117 * Values range from: 0 to 15
2118 * The meaning of the values depends on CPU revision and dual-channel state,
2119 * see relevant BKDG more info.
2121 * The memory controller provides for total of only 8 CSROWs in its current
2122 * architecture. Each "pair" of CSROWs normally represents just one DIMM in
2123 * single channel or two (2) DIMMs in dual channel mode.
2125 * The following code logic collapses the various tables for CSROW based on CPU
2129 * The number of PAGE_SIZE pages on the specified CSROW number it
2133 static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr)
2135 u32 cs_mode, nr_pages;
2136 u32 dbam = dct ? pvt->dbam1 : pvt->dbam0;
2139 * The math on this doesn't look right on the surface because x/2*4 can
2140 * be simplified to x*2 but this expression makes use of the fact that
2141 * it is integral math where 1/2=0. This intermediate value becomes the
2142 * number of bits to shift the DBAM register to extract the proper CSROW
2145 cs_mode = (dbam >> ((csrow_nr / 2) * 4)) & 0xF;
2147 nr_pages = pvt->ops->dbam_to_cs(pvt, dct, cs_mode) << (20 - PAGE_SHIFT);
2149 debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode);
2150 debugf0(" nr_pages= %u channel-count = %d\n",
2151 nr_pages, pvt->channel_count);
2157 * Initialize the array of csrow attribute instances, based on the values
2158 * from pci config hardware registers.
2160 static int init_csrows(struct mem_ctl_info *mci)
2162 struct csrow_info *csrow;
2163 struct amd64_pvt *pvt = mci->pvt_info;
2164 u64 input_addr_min, input_addr_max, sys_addr, base, mask;
2168 amd64_read_pci_cfg(pvt->F3, NBCFG, &val);
2172 debugf0("node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2173 pvt->mc_node_id, val,
2174 !!(val & NBCFG_CHIPKILL), !!(val & NBCFG_ECC_ENABLE));
2176 for_each_chip_select(i, 0, pvt) {
2177 csrow = &mci->csrows[i];
2179 if (!csrow_enabled(i, 0, pvt) && !csrow_enabled(i, 1, pvt)) {
2180 debugf1("----CSROW %d EMPTY for node %d\n", i,
2185 debugf1("----CSROW %d VALID for MC node %d\n",
2186 i, pvt->mc_node_id);
2189 if (csrow_enabled(i, 0, pvt))
2190 csrow->nr_pages = amd64_csrow_nr_pages(pvt, 0, i);
2191 if (csrow_enabled(i, 1, pvt))
2192 csrow->nr_pages += amd64_csrow_nr_pages(pvt, 1, i);
2193 find_csrow_limits(mci, i, &input_addr_min, &input_addr_max);
2194 sys_addr = input_addr_to_sys_addr(mci, input_addr_min);
2195 csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT);
2196 sys_addr = input_addr_to_sys_addr(mci, input_addr_max);
2197 csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT);
2199 get_cs_base_and_mask(pvt, i, 0, &base, &mask);
2200 csrow->page_mask = ~mask;
2201 /* 8 bytes of resolution */
2203 csrow->mtype = amd64_determine_memory_type(pvt, i);
2205 debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i);
2206 debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n",
2207 (unsigned long)input_addr_min,
2208 (unsigned long)input_addr_max);
2209 debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n",
2210 (unsigned long)sys_addr, csrow->page_mask);
2211 debugf1(" nr_pages: %u first_page: 0x%lx "
2212 "last_page: 0x%lx\n",
2213 (unsigned)csrow->nr_pages,
2214 csrow->first_page, csrow->last_page);
2217 * determine whether CHIPKILL or JUST ECC or NO ECC is operating
2219 if (pvt->nbcfg & NBCFG_ECC_ENABLE)
2221 (pvt->nbcfg & NBCFG_CHIPKILL) ?
2222 EDAC_S4ECD4ED : EDAC_SECDED;
2224 csrow->edac_mode = EDAC_NONE;
2230 /* get all cores on this DCT */
2231 static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, unsigned nid)
2235 for_each_online_cpu(cpu)
2236 if (amd_get_nb_id(cpu) == nid)
2237 cpumask_set_cpu(cpu, mask);
2240 /* check MCG_CTL on all the cpus on this node */
2241 static bool amd64_nb_mce_bank_enabled_on_node(unsigned nid)
2247 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
2248 amd64_warn("%s: Error allocating mask\n", __func__);
2252 get_cpus_on_this_dct_cpumask(mask, nid);
2254 rdmsr_on_cpus(mask, MSR_IA32_MCG_CTL, msrs);
2256 for_each_cpu(cpu, mask) {
2257 struct msr *reg = per_cpu_ptr(msrs, cpu);
2258 nbe = reg->l & MSR_MCGCTL_NBE;
2260 debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
2262 (nbe ? "enabled" : "disabled"));
2270 free_cpumask_var(mask);
2274 static int toggle_ecc_err_reporting(struct ecc_settings *s, u8 nid, bool on)
2276 cpumask_var_t cmask;
2279 if (!zalloc_cpumask_var(&cmask, GFP_KERNEL)) {
2280 amd64_warn("%s: error allocating mask\n", __func__);
2284 get_cpus_on_this_dct_cpumask(cmask, nid);
2286 rdmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2288 for_each_cpu(cpu, cmask) {
2290 struct msr *reg = per_cpu_ptr(msrs, cpu);
2293 if (reg->l & MSR_MCGCTL_NBE)
2294 s->flags.nb_mce_enable = 1;
2296 reg->l |= MSR_MCGCTL_NBE;
2299 * Turn off NB MCE reporting only when it was off before
2301 if (!s->flags.nb_mce_enable)
2302 reg->l &= ~MSR_MCGCTL_NBE;
2305 wrmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2307 free_cpumask_var(cmask);
2312 static bool enable_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2316 u32 value, mask = 0x3; /* UECC/CECC enable */
2318 if (toggle_ecc_err_reporting(s, nid, ON)) {
2319 amd64_warn("Error enabling ECC reporting over MCGCTL!\n");
2323 amd64_read_pci_cfg(F3, NBCTL, &value);
2325 s->old_nbctl = value & mask;
2326 s->nbctl_valid = true;
2329 amd64_write_pci_cfg(F3, NBCTL, value);
2331 amd64_read_pci_cfg(F3, NBCFG, &value);
2333 debugf0("1: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
2334 nid, value, !!(value & NBCFG_ECC_ENABLE));
2336 if (!(value & NBCFG_ECC_ENABLE)) {
2337 amd64_warn("DRAM ECC disabled on this node, enabling...\n");
2339 s->flags.nb_ecc_prev = 0;
2341 /* Attempt to turn on DRAM ECC Enable */
2342 value |= NBCFG_ECC_ENABLE;
2343 amd64_write_pci_cfg(F3, NBCFG, value);
2345 amd64_read_pci_cfg(F3, NBCFG, &value);
2347 if (!(value & NBCFG_ECC_ENABLE)) {
2348 amd64_warn("Hardware rejected DRAM ECC enable,"
2349 "check memory DIMM configuration.\n");
2352 amd64_info("Hardware accepted DRAM ECC Enable\n");
2355 s->flags.nb_ecc_prev = 1;
2358 debugf0("2: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
2359 nid, value, !!(value & NBCFG_ECC_ENABLE));
2364 static void restore_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2367 u32 value, mask = 0x3; /* UECC/CECC enable */
2370 if (!s->nbctl_valid)
2373 amd64_read_pci_cfg(F3, NBCTL, &value);
2375 value |= s->old_nbctl;
2377 amd64_write_pci_cfg(F3, NBCTL, value);
2379 /* restore previous BIOS DRAM ECC "off" setting we force-enabled */
2380 if (!s->flags.nb_ecc_prev) {
2381 amd64_read_pci_cfg(F3, NBCFG, &value);
2382 value &= ~NBCFG_ECC_ENABLE;
2383 amd64_write_pci_cfg(F3, NBCFG, value);
2386 /* restore the NB Enable MCGCTL bit */
2387 if (toggle_ecc_err_reporting(s, nid, OFF))
2388 amd64_warn("Error restoring NB MCGCTL settings!\n");
2392 * EDAC requires that the BIOS have ECC enabled before
2393 * taking over the processing of ECC errors. A command line
2394 * option allows to force-enable hardware ECC later in
2395 * enable_ecc_error_reporting().
2397 static const char *ecc_msg =
2398 "ECC disabled in the BIOS or no ECC capability, module will not load.\n"
2399 " Either enable ECC checking or force module loading by setting "
2400 "'ecc_enable_override'.\n"
2401 " (Note that use of the override may cause unknown side effects.)\n";
2403 static bool ecc_enabled(struct pci_dev *F3, u8 nid)
2407 bool nb_mce_en = false;
2409 amd64_read_pci_cfg(F3, NBCFG, &value);
2411 ecc_en = !!(value & NBCFG_ECC_ENABLE);
2412 amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
2414 nb_mce_en = amd64_nb_mce_bank_enabled_on_node(nid);
2416 amd64_notice("NB MCE bank disabled, set MSR "
2417 "0x%08x[4] on node %d to enable.\n",
2418 MSR_IA32_MCG_CTL, nid);
2420 if (!ecc_en || !nb_mce_en) {
2421 amd64_notice("%s", ecc_msg);
2427 struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +
2428 ARRAY_SIZE(amd64_inj_attrs) +
2431 struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } };
2433 static void set_mc_sysfs_attrs(struct mem_ctl_info *mci)
2435 unsigned int i = 0, j = 0;
2437 for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)
2438 sysfs_attrs[i] = amd64_dbg_attrs[i];
2440 if (boot_cpu_data.x86 >= 0x10)
2441 for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)
2442 sysfs_attrs[i] = amd64_inj_attrs[j];
2444 sysfs_attrs[i] = terminator;
2446 mci->mc_driver_sysfs_attributes = sysfs_attrs;
2449 static void setup_mci_misc_attrs(struct mem_ctl_info *mci,
2450 struct amd64_family_type *fam)
2452 struct amd64_pvt *pvt = mci->pvt_info;
2454 mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;
2455 mci->edac_ctl_cap = EDAC_FLAG_NONE;
2457 if (pvt->nbcap & NBCAP_SECDED)
2458 mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
2460 if (pvt->nbcap & NBCAP_CHIPKILL)
2461 mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
2463 mci->edac_cap = amd64_determine_edac_cap(pvt);
2464 mci->mod_name = EDAC_MOD_STR;
2465 mci->mod_ver = EDAC_AMD64_VERSION;
2466 mci->ctl_name = fam->ctl_name;
2467 mci->dev_name = pci_name(pvt->F2);
2468 mci->ctl_page_to_phys = NULL;
2470 /* memory scrubber interface */
2471 mci->set_sdram_scrub_rate = amd64_set_scrub_rate;
2472 mci->get_sdram_scrub_rate = amd64_get_scrub_rate;
2476 * returns a pointer to the family descriptor on success, NULL otherwise.
2478 static struct amd64_family_type *amd64_per_family_init(struct amd64_pvt *pvt)
2480 u8 fam = boot_cpu_data.x86;
2481 struct amd64_family_type *fam_type = NULL;
2485 fam_type = &amd64_family_types[K8_CPUS];
2486 pvt->ops = &amd64_family_types[K8_CPUS].ops;
2490 fam_type = &amd64_family_types[F10_CPUS];
2491 pvt->ops = &amd64_family_types[F10_CPUS].ops;
2495 fam_type = &amd64_family_types[F15_CPUS];
2496 pvt->ops = &amd64_family_types[F15_CPUS].ops;
2500 amd64_err("Unsupported family!\n");
2504 pvt->ext_model = boot_cpu_data.x86_model >> 4;
2506 amd64_info("%s %sdetected (node %d).\n", fam_type->ctl_name,
2508 (pvt->ext_model >= K8_REV_F ? "revF or later "
2509 : "revE or earlier ")
2510 : ""), pvt->mc_node_id);
2514 static int amd64_init_one_instance(struct pci_dev *F2)
2516 struct amd64_pvt *pvt = NULL;
2517 struct amd64_family_type *fam_type = NULL;
2518 struct mem_ctl_info *mci = NULL;
2520 u8 nid = get_node_id(F2);
2523 pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
2527 pvt->mc_node_id = nid;
2531 fam_type = amd64_per_family_init(pvt);
2536 err = reserve_mc_sibling_devs(pvt, fam_type->f1_id, fam_type->f3_id);
2543 * We need to determine how many memory channels there are. Then use
2544 * that information for calculating the size of the dynamic instance
2545 * tables in the 'mci' structure.
2548 pvt->channel_count = pvt->ops->early_channel_count(pvt);
2549 if (pvt->channel_count < 0)
2553 mci = edac_mc_alloc(0, pvt->csels[0].b_cnt, pvt->channel_count, nid);
2557 mci->pvt_info = pvt;
2558 mci->dev = &pvt->F2->dev;
2560 setup_mci_misc_attrs(mci, fam_type);
2562 if (init_csrows(mci))
2563 mci->edac_cap = EDAC_FLAG_NONE;
2565 set_mc_sysfs_attrs(mci);
2568 if (edac_mc_add_mc(mci)) {
2569 debugf1("failed edac_mc_add_mc()\n");
2573 /* register stuff with EDAC MCE */
2574 if (report_gart_errors)
2575 amd_report_gart_errors(true);
2577 amd_register_ecc_decoder(amd64_decode_bus_error);
2581 atomic_inc(&drv_instances);
2589 free_mc_sibling_devs(pvt);
2598 static int __devinit amd64_probe_one_instance(struct pci_dev *pdev,
2599 const struct pci_device_id *mc_type)
2601 u8 nid = get_node_id(pdev);
2602 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2603 struct ecc_settings *s;
2606 ret = pci_enable_device(pdev);
2608 debugf0("ret=%d\n", ret);
2613 s = kzalloc(sizeof(struct ecc_settings), GFP_KERNEL);
2619 if (!ecc_enabled(F3, nid)) {
2622 if (!ecc_enable_override)
2625 amd64_warn("Forcing ECC on!\n");
2627 if (!enable_ecc_error_reporting(s, nid, F3))
2631 ret = amd64_init_one_instance(pdev);
2633 amd64_err("Error probing instance: %d\n", nid);
2634 restore_ecc_error_reporting(s, nid, F3);
2641 ecc_stngs[nid] = NULL;
2647 static void __devexit amd64_remove_one_instance(struct pci_dev *pdev)
2649 struct mem_ctl_info *mci;
2650 struct amd64_pvt *pvt;
2651 u8 nid = get_node_id(pdev);
2652 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2653 struct ecc_settings *s = ecc_stngs[nid];
2655 /* Remove from EDAC CORE tracking list */
2656 mci = edac_mc_del_mc(&pdev->dev);
2660 pvt = mci->pvt_info;
2662 restore_ecc_error_reporting(s, nid, F3);
2664 free_mc_sibling_devs(pvt);
2666 /* unregister from EDAC MCE */
2667 amd_report_gart_errors(false);
2668 amd_unregister_ecc_decoder(amd64_decode_bus_error);
2670 kfree(ecc_stngs[nid]);
2671 ecc_stngs[nid] = NULL;
2673 /* Free the EDAC CORE resources */
2674 mci->pvt_info = NULL;
2682 * This table is part of the interface for loading drivers for PCI devices. The
2683 * PCI core identifies what devices are on a system during boot, and then
2684 * inquiry this table to see if this driver is for a given device found.
2686 static const struct pci_device_id amd64_pci_table[] __devinitdata = {
2688 .vendor = PCI_VENDOR_ID_AMD,
2689 .device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
2690 .subvendor = PCI_ANY_ID,
2691 .subdevice = PCI_ANY_ID,
2696 .vendor = PCI_VENDOR_ID_AMD,
2697 .device = PCI_DEVICE_ID_AMD_10H_NB_DRAM,
2698 .subvendor = PCI_ANY_ID,
2699 .subdevice = PCI_ANY_ID,
2704 .vendor = PCI_VENDOR_ID_AMD,
2705 .device = PCI_DEVICE_ID_AMD_15H_NB_F2,
2706 .subvendor = PCI_ANY_ID,
2707 .subdevice = PCI_ANY_ID,
2714 MODULE_DEVICE_TABLE(pci, amd64_pci_table);
2716 static struct pci_driver amd64_pci_driver = {
2717 .name = EDAC_MOD_STR,
2718 .probe = amd64_probe_one_instance,
2719 .remove = __devexit_p(amd64_remove_one_instance),
2720 .id_table = amd64_pci_table,
2723 static void setup_pci_device(void)
2725 struct mem_ctl_info *mci;
2726 struct amd64_pvt *pvt;
2734 pvt = mci->pvt_info;
2736 edac_pci_create_generic_ctl(&pvt->F2->dev, EDAC_MOD_STR);
2738 if (!amd64_ctl_pci) {
2739 pr_warning("%s(): Unable to create PCI control\n",
2742 pr_warning("%s(): PCI error report via EDAC not set\n",
2748 static int __init amd64_edac_init(void)
2752 printk(KERN_INFO "AMD64 EDAC driver v%s\n", EDAC_AMD64_VERSION);
2756 if (amd_cache_northbridges() < 0)
2760 mcis = kzalloc(amd_nb_num() * sizeof(mcis[0]), GFP_KERNEL);
2761 ecc_stngs = kzalloc(amd_nb_num() * sizeof(ecc_stngs[0]), GFP_KERNEL);
2762 if (!(mcis && ecc_stngs))
2765 msrs = msrs_alloc();
2769 err = pci_register_driver(&amd64_pci_driver);
2774 if (!atomic_read(&drv_instances))
2775 goto err_no_instances;
2781 pci_unregister_driver(&amd64_pci_driver);
2798 static void __exit amd64_edac_exit(void)
2801 edac_pci_release_generic_ctl(amd64_ctl_pci);
2803 pci_unregister_driver(&amd64_pci_driver);
2815 module_init(amd64_edac_init);
2816 module_exit(amd64_edac_exit);
2818 MODULE_LICENSE("GPL");
2819 MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "
2820 "Dave Peterson, Thayne Harbaugh");
2821 MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "
2822 EDAC_AMD64_VERSION);
2824 module_param(edac_op_state, int, 0444);
2825 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");