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, 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, 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 chip_select_base(i, dct, pvt) \
397 pvt->csels[dct].csbases[i]
399 #define for_each_chip_select_mask(i, dct, pvt) \
400 for (i = 0; i < pvt->csels[dct].m_cnt; i++)
403 * @input_addr is an InputAddr associated with the node given by mci. Return the
404 * csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr).
406 static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr)
408 struct amd64_pvt *pvt;
414 for_each_chip_select(csrow, 0, pvt) {
415 if (!csrow_enabled(csrow, 0, pvt))
418 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
422 if ((input_addr & mask) == (base & mask)) {
423 debugf2("InputAddr 0x%lx matches csrow %d (node %d)\n",
424 (unsigned long)input_addr, csrow,
430 debugf2("no matching csrow for InputAddr 0x%lx (MC node %d)\n",
431 (unsigned long)input_addr, pvt->mc_node_id);
437 * Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094)
438 * for the node represented by mci. Info is passed back in *hole_base,
439 * *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if
440 * info is invalid. Info may be invalid for either of the following reasons:
442 * - The revision of the node is not E or greater. In this case, the DRAM Hole
443 * Address Register does not exist.
445 * - The DramHoleValid bit is cleared in the DRAM Hole Address Register,
446 * indicating that its contents are not valid.
448 * The values passed back in *hole_base, *hole_offset, and *hole_size are
449 * complete 32-bit values despite the fact that the bitfields in the DHAR
450 * only represent bits 31-24 of the base and offset values.
452 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
453 u64 *hole_offset, u64 *hole_size)
455 struct amd64_pvt *pvt = mci->pvt_info;
458 /* only revE and later have the DRAM Hole Address Register */
459 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_E) {
460 debugf1(" revision %d for node %d does not support DHAR\n",
461 pvt->ext_model, pvt->mc_node_id);
465 /* valid for Fam10h and above */
466 if (boot_cpu_data.x86 >= 0x10 && !dhar_mem_hoist_valid(pvt)) {
467 debugf1(" Dram Memory Hoisting is DISABLED on this system\n");
471 if (!dhar_valid(pvt)) {
472 debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n",
477 /* This node has Memory Hoisting */
479 /* +------------------+--------------------+--------------------+-----
480 * | memory | DRAM hole | relocated |
481 * | [0, (x - 1)] | [x, 0xffffffff] | addresses from |
483 * | | | [0x100000000, |
484 * | | | (0x100000000+ |
485 * | | | (0xffffffff-x))] |
486 * +------------------+--------------------+--------------------+-----
488 * Above is a diagram of physical memory showing the DRAM hole and the
489 * relocated addresses from the DRAM hole. As shown, the DRAM hole
490 * starts at address x (the base address) and extends through address
491 * 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the
492 * addresses in the hole so that they start at 0x100000000.
495 base = dhar_base(pvt);
498 *hole_size = (0x1ull << 32) - base;
500 if (boot_cpu_data.x86 > 0xf)
501 *hole_offset = f10_dhar_offset(pvt);
503 *hole_offset = k8_dhar_offset(pvt);
505 debugf1(" DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n",
506 pvt->mc_node_id, (unsigned long)*hole_base,
507 (unsigned long)*hole_offset, (unsigned long)*hole_size);
511 EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
514 * Return the DramAddr that the SysAddr given by @sys_addr maps to. It is
515 * assumed that sys_addr maps to the node given by mci.
517 * The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section
518 * 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a
519 * SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled,
520 * then it is also involved in translating a SysAddr to a DramAddr. Sections
521 * 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting.
522 * These parts of the documentation are unclear. I interpret them as follows:
524 * When node n receives a SysAddr, it processes the SysAddr as follows:
526 * 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM
527 * Limit registers for node n. If the SysAddr is not within the range
528 * specified by the base and limit values, then node n ignores the Sysaddr
529 * (since it does not map to node n). Otherwise continue to step 2 below.
531 * 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is
532 * disabled so skip to step 3 below. Otherwise see if the SysAddr is within
533 * the range of relocated addresses (starting at 0x100000000) from the DRAM
534 * hole. If not, skip to step 3 below. Else get the value of the
535 * DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the
536 * offset defined by this value from the SysAddr.
538 * 3. Obtain the base address for node n from the DRAMBase field of the DRAM
539 * Base register for node n. To obtain the DramAddr, subtract the base
540 * address from the SysAddr, as shown near the start of section 3.4.4 (p.70).
542 static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr)
544 struct amd64_pvt *pvt = mci->pvt_info;
545 u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
548 dram_base = get_dram_base(pvt, pvt->mc_node_id);
550 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
553 if ((sys_addr >= (1ull << 32)) &&
554 (sys_addr < ((1ull << 32) + hole_size))) {
555 /* use DHAR to translate SysAddr to DramAddr */
556 dram_addr = sys_addr - hole_offset;
558 debugf2("using DHAR to translate SysAddr 0x%lx to "
560 (unsigned long)sys_addr,
561 (unsigned long)dram_addr);
568 * Translate the SysAddr to a DramAddr as shown near the start of
569 * section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8
570 * only deals with 40-bit values. Therefore we discard bits 63-40 of
571 * sys_addr below. If bit 39 of sys_addr is 1 then the bits we
572 * discard are all 1s. Otherwise the bits we discard are all 0s. See
573 * section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture
574 * Programmer's Manual Volume 1 Application Programming.
576 dram_addr = (sys_addr & GENMASK(0, 39)) - dram_base;
578 debugf2("using DRAM Base register to translate SysAddr 0x%lx to "
579 "DramAddr 0x%lx\n", (unsigned long)sys_addr,
580 (unsigned long)dram_addr);
585 * @intlv_en is the value of the IntlvEn field from a DRAM Base register
586 * (section 3.4.4.1). Return the number of bits from a SysAddr that are used
587 * for node interleaving.
589 static int num_node_interleave_bits(unsigned intlv_en)
591 static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 };
594 BUG_ON(intlv_en > 7);
595 n = intlv_shift_table[intlv_en];
599 /* Translate the DramAddr given by @dram_addr to an InputAddr. */
600 static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr)
602 struct amd64_pvt *pvt;
609 * See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
610 * concerning translating a DramAddr to an InputAddr.
612 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
613 input_addr = ((dram_addr >> intlv_shift) & GENMASK(12, 35)) +
616 debugf2(" Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n",
617 intlv_shift, (unsigned long)dram_addr,
618 (unsigned long)input_addr);
624 * Translate the SysAddr represented by @sys_addr to an InputAddr. It is
625 * assumed that @sys_addr maps to the node given by mci.
627 static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
632 dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr));
634 debugf2("SysAdddr 0x%lx translates to InputAddr 0x%lx\n",
635 (unsigned long)sys_addr, (unsigned long)input_addr);
642 * @input_addr is an InputAddr associated with the node represented by mci.
643 * Translate @input_addr to a DramAddr and return the result.
645 static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
647 struct amd64_pvt *pvt;
648 int node_id, intlv_shift;
653 * Near the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
654 * shows how to translate a DramAddr to an InputAddr. Here we reverse
655 * this procedure. When translating from a DramAddr to an InputAddr, the
656 * bits used for node interleaving are discarded. Here we recover these
657 * bits from the IntlvSel field of the DRAM Limit register (section
658 * 3.4.4.2) for the node that input_addr is associated with.
661 node_id = pvt->mc_node_id;
662 BUG_ON((node_id < 0) || (node_id > 7));
664 intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
666 if (intlv_shift == 0) {
667 debugf1(" InputAddr 0x%lx translates to DramAddr of "
668 "same value\n", (unsigned long)input_addr);
673 bits = ((input_addr & GENMASK(12, 35)) << intlv_shift) +
674 (input_addr & 0xfff);
676 intlv_sel = dram_intlv_sel(pvt, node_id) & ((1 << intlv_shift) - 1);
677 dram_addr = bits + (intlv_sel << 12);
679 debugf1("InputAddr 0x%lx translates to DramAddr 0x%lx "
680 "(%d node interleave bits)\n", (unsigned long)input_addr,
681 (unsigned long)dram_addr, intlv_shift);
687 * @dram_addr is a DramAddr that maps to the node represented by mci. Convert
688 * @dram_addr to a SysAddr.
690 static u64 dram_addr_to_sys_addr(struct mem_ctl_info *mci, u64 dram_addr)
692 struct amd64_pvt *pvt = mci->pvt_info;
693 u64 hole_base, hole_offset, hole_size, base, sys_addr;
696 ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
699 if ((dram_addr >= hole_base) &&
700 (dram_addr < (hole_base + hole_size))) {
701 sys_addr = dram_addr + hole_offset;
703 debugf1("using DHAR to translate DramAddr 0x%lx to "
704 "SysAddr 0x%lx\n", (unsigned long)dram_addr,
705 (unsigned long)sys_addr);
711 base = get_dram_base(pvt, pvt->mc_node_id);
712 sys_addr = dram_addr + base;
715 * The sys_addr we have computed up to this point is a 40-bit value
716 * because the k8 deals with 40-bit values. However, the value we are
717 * supposed to return is a full 64-bit physical address. The AMD
718 * x86-64 architecture specifies that the most significant implemented
719 * address bit through bit 63 of a physical address must be either all
720 * 0s or all 1s. Therefore we sign-extend the 40-bit sys_addr to a
721 * 64-bit value below. See section 3.4.2 of AMD publication 24592:
722 * AMD x86-64 Architecture Programmer's Manual Volume 1 Application
725 sys_addr |= ~((sys_addr & (1ull << 39)) - 1);
727 debugf1(" Node %d, DramAddr 0x%lx to SysAddr 0x%lx\n",
728 pvt->mc_node_id, (unsigned long)dram_addr,
729 (unsigned long)sys_addr);
735 * @input_addr is an InputAddr associated with the node given by mci. Translate
736 * @input_addr to a SysAddr.
738 static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci,
741 return dram_addr_to_sys_addr(mci,
742 input_addr_to_dram_addr(mci, input_addr));
746 * Find the minimum and maximum InputAddr values that map to the given @csrow.
747 * Pass back these values in *input_addr_min and *input_addr_max.
749 static void find_csrow_limits(struct mem_ctl_info *mci, int csrow,
750 u64 *input_addr_min, u64 *input_addr_max)
752 struct amd64_pvt *pvt;
756 BUG_ON((csrow < 0) || (csrow >= pvt->csels[0].b_cnt));
758 get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
760 *input_addr_min = base & ~mask;
761 *input_addr_max = base | mask;
764 /* Map the Error address to a PAGE and PAGE OFFSET. */
765 static inline void error_address_to_page_and_offset(u64 error_address,
766 u32 *page, u32 *offset)
768 *page = (u32) (error_address >> PAGE_SHIFT);
769 *offset = ((u32) error_address) & ~PAGE_MASK;
773 * @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address
774 * Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers
775 * of a node that detected an ECC memory error. mci represents the node that
776 * the error address maps to (possibly different from the node that detected
777 * the error). Return the number of the csrow that sys_addr maps to, or -1 on
780 static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
784 csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr));
787 amd64_mc_err(mci, "Failed to translate InputAddr to csrow for "
788 "address 0x%lx\n", (unsigned long)sys_addr);
792 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
795 * Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs
798 static enum edac_type amd64_determine_edac_cap(struct amd64_pvt *pvt)
801 enum dev_type edac_cap = EDAC_FLAG_NONE;
803 bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= K8_REV_F)
807 if (pvt->dclr0 & BIT(bit))
808 edac_cap = EDAC_FLAG_SECDED;
814 static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt);
816 static void amd64_dump_dramcfg_low(u32 dclr, int chan)
818 debugf1("F2x%d90 (DRAM Cfg Low): 0x%08x\n", chan, dclr);
820 debugf1(" DIMM type: %sbuffered; all DIMMs support ECC: %s\n",
821 (dclr & BIT(16)) ? "un" : "",
822 (dclr & BIT(19)) ? "yes" : "no");
824 debugf1(" PAR/ERR parity: %s\n",
825 (dclr & BIT(8)) ? "enabled" : "disabled");
827 if (boot_cpu_data.x86 == 0x10)
828 debugf1(" DCT 128bit mode width: %s\n",
829 (dclr & BIT(11)) ? "128b" : "64b");
831 debugf1(" x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
832 (dclr & BIT(12)) ? "yes" : "no",
833 (dclr & BIT(13)) ? "yes" : "no",
834 (dclr & BIT(14)) ? "yes" : "no",
835 (dclr & BIT(15)) ? "yes" : "no");
838 /* Display and decode various NB registers for debug purposes. */
839 static void dump_misc_regs(struct amd64_pvt *pvt)
841 debugf1("F3xE8 (NB Cap): 0x%08x\n", pvt->nbcap);
843 debugf1(" NB two channel DRAM capable: %s\n",
844 (pvt->nbcap & NBCAP_DCT_DUAL) ? "yes" : "no");
846 debugf1(" ECC capable: %s, ChipKill ECC capable: %s\n",
847 (pvt->nbcap & NBCAP_SECDED) ? "yes" : "no",
848 (pvt->nbcap & NBCAP_CHIPKILL) ? "yes" : "no");
850 amd64_dump_dramcfg_low(pvt->dclr0, 0);
852 debugf1("F3xB0 (Online Spare): 0x%08x\n", pvt->online_spare);
854 debugf1("F1xF0 (DRAM Hole Address): 0x%08x, base: 0x%08x, "
856 pvt->dhar, dhar_base(pvt),
857 (boot_cpu_data.x86 == 0xf) ? k8_dhar_offset(pvt)
858 : f10_dhar_offset(pvt));
860 debugf1(" DramHoleValid: %s\n", dhar_valid(pvt) ? "yes" : "no");
862 amd64_debug_display_dimm_sizes(0, pvt);
864 /* everything below this point is Fam10h and above */
865 if (boot_cpu_data.x86 == 0xf)
868 amd64_debug_display_dimm_sizes(1, pvt);
870 amd64_info("using %s syndromes.\n", ((pvt->syn_type == 8) ? "x8" : "x4"));
872 /* Only if NOT ganged does dclr1 have valid info */
873 if (!dct_ganging_enabled(pvt))
874 amd64_dump_dramcfg_low(pvt->dclr1, 1);
878 * see BKDG, F2x[1,0][5C:40], F2[1,0][6C:60]
880 static void prep_chip_selects(struct amd64_pvt *pvt)
882 if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
883 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
884 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
886 pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
887 pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
892 * Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
894 static void read_dct_base_mask(struct amd64_pvt *pvt)
898 prep_chip_selects(pvt);
900 for_each_chip_select(cs, 0, pvt) {
901 u32 reg0 = DCSB0 + (cs * 4);
902 u32 reg1 = DCSB1 + (cs * 4);
903 u32 *base0 = &pvt->csels[0].csbases[cs];
904 u32 *base1 = &pvt->csels[1].csbases[cs];
906 if (!amd64_read_dct_pci_cfg(pvt, reg0, base0))
907 debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
910 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
913 if (!amd64_read_dct_pci_cfg(pvt, reg1, base1))
914 debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
918 for_each_chip_select_mask(cs, 0, pvt) {
919 u32 reg0 = DCSM0 + (cs * 4);
920 u32 reg1 = DCSM1 + (cs * 4);
921 u32 *mask0 = &pvt->csels[0].csmasks[cs];
922 u32 *mask1 = &pvt->csels[1].csmasks[cs];
924 if (!amd64_read_dct_pci_cfg(pvt, reg0, mask0))
925 debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
928 if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
931 if (!amd64_read_dct_pci_cfg(pvt, reg1, mask1))
932 debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
937 static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
941 /* F15h supports only DDR3 */
942 if (boot_cpu_data.x86 >= 0x15)
943 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
944 else if (boot_cpu_data.x86 == 0x10 || pvt->ext_model >= K8_REV_F) {
945 if (pvt->dchr0 & DDR3_MODE)
946 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
948 type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
950 type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
953 amd64_info("CS%d: %s\n", cs, edac_mem_types[type]);
958 /* Get the number of DCT channels the memory controller is using. */
959 static int k8_early_channel_count(struct amd64_pvt *pvt)
963 if (pvt->ext_model >= K8_REV_F)
964 /* RevF (NPT) and later */
965 flag = pvt->dclr0 & F10_WIDTH_128;
967 /* RevE and earlier */
968 flag = pvt->dclr0 & REVE_WIDTH_128;
973 return (flag) ? 2 : 1;
976 /* On F10h and later ErrAddr is MC4_ADDR[47:1] */
977 static u64 get_error_address(struct mce *m)
982 if (boot_cpu_data.x86 == 0xf) {
987 return m->addr & GENMASK(start_bit, end_bit);
990 static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
992 u32 off = range << 3;
994 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off, &pvt->ranges[range].base.lo);
995 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off, &pvt->ranges[range].lim.lo);
997 if (boot_cpu_data.x86 == 0xf)
1000 if (!dram_rw(pvt, range))
1003 amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off, &pvt->ranges[range].base.hi);
1004 amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off, &pvt->ranges[range].lim.hi);
1007 static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
1010 struct mem_ctl_info *src_mci;
1011 struct amd64_pvt *pvt = mci->pvt_info;
1015 /* CHIPKILL enabled */
1016 if (pvt->nbcfg & NBCFG_CHIPKILL) {
1017 channel = get_channel_from_ecc_syndrome(mci, syndrome);
1020 * Syndrome didn't map, so we don't know which of the
1021 * 2 DIMMs is in error. So we need to ID 'both' of them
1024 amd64_mc_warn(mci, "unknown syndrome 0x%04x - possible "
1025 "error reporting race\n", syndrome);
1026 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1031 * non-chipkill ecc mode
1033 * The k8 documentation is unclear about how to determine the
1034 * channel number when using non-chipkill memory. This method
1035 * was obtained from email communication with someone at AMD.
1036 * (Wish the email was placed in this comment - norsk)
1038 channel = ((sys_addr & BIT(3)) != 0);
1042 * Find out which node the error address belongs to. This may be
1043 * different from the node that detected the error.
1045 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1047 amd64_mc_err(mci, "failed to map error addr 0x%lx to a node\n",
1048 (unsigned long)sys_addr);
1049 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1053 /* Now map the sys_addr to a CSROW */
1054 csrow = sys_addr_to_csrow(src_mci, sys_addr);
1056 edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR);
1058 error_address_to_page_and_offset(sys_addr, &page, &offset);
1060 edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow,
1061 channel, EDAC_MOD_STR);
1065 static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, int cs_mode)
1069 if (pvt->ext_model >= K8_REV_F)
1070 dbam_map = ddr2_dbam;
1071 else if (pvt->ext_model >= K8_REV_D)
1072 dbam_map = ddr2_dbam_revD;
1074 dbam_map = ddr2_dbam_revCG;
1076 return dbam_map[cs_mode];
1080 * Get the number of DCT channels in use.
1083 * number of Memory Channels in operation
1085 * contents of the DCL0_LOW register
1087 static int f1x_early_channel_count(struct amd64_pvt *pvt)
1089 int i, j, channels = 0;
1091 /* On F10h, if we are in 128 bit mode, then we are using 2 channels */
1092 if (boot_cpu_data.x86 == 0x10 && (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 void f10_read_dram_ctl_register(struct amd64_pvt *pvt)
1144 if (!amd64_read_dct_pci_cfg(pvt, DCT_SEL_LO, &pvt->dct_sel_lo)) {
1145 debugf0("F2x110 (DCTSelLow): 0x%08x, High range addrs at: 0x%x\n",
1146 pvt->dct_sel_lo, dct_sel_baseaddr(pvt));
1148 debugf0(" mode: %s, All DCTs on: %s\n",
1149 (dct_ganging_enabled(pvt) ? "ganged" : "unganged"),
1150 (dct_dram_enabled(pvt) ? "yes" : "no"));
1152 if (!dct_ganging_enabled(pvt))
1153 debugf0(" Address range split per DCT: %s\n",
1154 (dct_high_range_enabled(pvt) ? "yes" : "no"));
1156 debugf0(" data interleave for ECC: %s, "
1157 "DRAM cleared since last warm reset: %s\n",
1158 (dct_data_intlv_enabled(pvt) ? "enabled" : "disabled"),
1159 (dct_memory_cleared(pvt) ? "yes" : "no"));
1161 debugf0(" channel interleave: %s, "
1162 "interleave bits selector: 0x%x\n",
1163 (dct_interleave_enabled(pvt) ? "enabled" : "disabled"),
1164 dct_sel_interleave_addr(pvt));
1167 amd64_read_dct_pci_cfg(pvt, DCT_SEL_HI, &pvt->dct_sel_hi);
1171 * Determine channel (DCT) based on the interleaving mode: F10h BKDG, 2.8.9 Memory
1172 * Interleaving Modes.
1174 static u8 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
1175 bool hi_range_sel, u8 intlv_en)
1177 u32 dct_sel_high = (pvt->dct_sel_lo >> 1) & 1;
1179 if (dct_ganging_enabled(pvt))
1183 return dct_sel_high;
1186 * see F2x110[DctSelIntLvAddr] - channel interleave mode
1188 if (dct_interleave_enabled(pvt)) {
1189 u8 intlv_addr = dct_sel_interleave_addr(pvt);
1191 /* return DCT select function: 0=DCT0, 1=DCT1 */
1193 return sys_addr >> 6 & 1;
1195 if (intlv_addr & 0x2) {
1196 u8 shift = intlv_addr & 0x1 ? 9 : 6;
1197 u32 temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) % 2;
1199 return ((sys_addr >> shift) & 1) ^ temp;
1202 return (sys_addr >> (12 + hweight8(intlv_en))) & 1;
1205 if (dct_high_range_enabled(pvt))
1206 return ~dct_sel_high & 1;
1211 /* Convert the sys_addr to the normalized DCT address */
1212 static u64 f10_get_norm_dct_addr(struct amd64_pvt *pvt, int range,
1213 u64 sys_addr, bool hi_rng,
1214 u32 dct_sel_base_addr)
1217 u64 dram_base = get_dram_base(pvt, range);
1218 u64 hole_off = f10_dhar_offset(pvt);
1219 u32 hole_valid = dhar_valid(pvt);
1220 u64 dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
1225 * base address of high range is below 4Gb
1226 * (bits [47:27] at [31:11])
1227 * DRAM address space on this DCT is hoisted above 4Gb &&
1230 * remove hole offset from sys_addr
1232 * remove high range offset from sys_addr
1234 if ((!(dct_sel_base_addr >> 16) ||
1235 dct_sel_base_addr < dhar_base(pvt)) &&
1237 (sys_addr >= BIT_64(32)))
1238 chan_off = hole_off;
1240 chan_off = dct_sel_base_off;
1244 * we have a valid hole &&
1249 * remove dram base to normalize to DCT address
1251 if (hole_valid && (sys_addr >= BIT_64(32)))
1252 chan_off = hole_off;
1254 chan_off = dram_base;
1257 return (sys_addr & GENMASK(6,47)) - (chan_off & GENMASK(23,47));
1261 * checks if the csrow passed in is marked as SPARED, if so returns the new
1264 static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
1268 if (online_spare_swap_done(pvt, dct) &&
1269 csrow == online_spare_bad_dramcs(pvt, dct)) {
1271 for_each_chip_select(tmp_cs, dct, pvt) {
1272 if (chip_select_base(tmp_cs, dct, pvt) & 0x2) {
1282 * Iterate over the DRAM DCT "base" and "mask" registers looking for a
1283 * SystemAddr match on the specified 'ChannelSelect' and 'NodeID'
1286 * -EINVAL: NOT FOUND
1287 * 0..csrow = Chip-Select Row
1289 static int f10_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct)
1291 struct mem_ctl_info *mci;
1292 struct amd64_pvt *pvt;
1293 u64 cs_base, cs_mask;
1294 int cs_found = -EINVAL;
1301 pvt = mci->pvt_info;
1303 debugf1("input addr: 0x%llx, DCT: %d\n", in_addr, dct);
1305 for_each_chip_select(csrow, dct, pvt) {
1306 if (!csrow_enabled(csrow, dct, pvt))
1309 get_cs_base_and_mask(pvt, csrow, dct, &cs_base, &cs_mask);
1311 debugf1(" CSROW=%d CSBase=0x%llx CSMask=0x%llx\n",
1312 csrow, cs_base, cs_mask);
1316 debugf1(" (InputAddr & ~CSMask)=0x%llx "
1317 "(CSBase & ~CSMask)=0x%llx\n",
1318 (in_addr & cs_mask), (cs_base & cs_mask));
1320 if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
1321 cs_found = f10_process_possible_spare(pvt, dct, csrow);
1323 debugf1(" MATCH csrow=%d\n", cs_found);
1331 * See F2x10C. Non-interleaved graphics framebuffer memory under the 16G is
1332 * swapped with a region located at the bottom of memory so that the GPU can use
1333 * the interleaved region and thus two channels.
1335 static u64 f10_swap_interleaved_region(struct amd64_pvt *pvt, u64 sys_addr)
1337 u32 swap_reg, swap_base, swap_limit, rgn_size, tmp_addr;
1339 if (boot_cpu_data.x86 == 0x10) {
1340 /* only revC3 and revE have that feature */
1341 if (boot_cpu_data.x86_model < 4 ||
1342 (boot_cpu_data.x86_model < 0xa &&
1343 boot_cpu_data.x86_mask < 3))
1347 amd64_read_dct_pci_cfg(pvt, SWAP_INTLV_REG, &swap_reg);
1349 if (!(swap_reg & 0x1))
1352 swap_base = (swap_reg >> 3) & 0x7f;
1353 swap_limit = (swap_reg >> 11) & 0x7f;
1354 rgn_size = (swap_reg >> 20) & 0x7f;
1355 tmp_addr = sys_addr >> 27;
1357 if (!(sys_addr >> 34) &&
1358 (((tmp_addr >= swap_base) &&
1359 (tmp_addr <= swap_limit)) ||
1360 (tmp_addr < rgn_size)))
1361 return sys_addr ^ (u64)swap_base << 27;
1366 /* For a given @dram_range, check if @sys_addr falls within it. */
1367 static int f10_match_to_this_node(struct amd64_pvt *pvt, int range,
1368 u64 sys_addr, int *nid, int *chan_sel)
1370 int cs_found = -EINVAL;
1374 bool high_range = false;
1376 u8 node_id = dram_dst_node(pvt, range);
1377 u8 intlv_en = dram_intlv_en(pvt, range);
1378 u32 intlv_sel = dram_intlv_sel(pvt, range);
1380 debugf1("(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
1381 range, sys_addr, get_dram_limit(pvt, range));
1384 (intlv_sel != ((sys_addr >> 12) & intlv_en)))
1387 sys_addr = f10_swap_interleaved_region(pvt, sys_addr);
1389 dct_sel_base = dct_sel_baseaddr(pvt);
1392 * check whether addresses >= DctSelBaseAddr[47:27] are to be used to
1393 * select between DCT0 and DCT1.
1395 if (dct_high_range_enabled(pvt) &&
1396 !dct_ganging_enabled(pvt) &&
1397 ((sys_addr >> 27) >= (dct_sel_base >> 11)))
1400 channel = f10_determine_channel(pvt, sys_addr, high_range, intlv_en);
1402 chan_addr = f10_get_norm_dct_addr(pvt, range, sys_addr,
1403 high_range, dct_sel_base);
1405 /* Remove node interleaving, see F1x120 */
1407 chan_addr = ((chan_addr >> (12 + hweight8(intlv_en))) << 12) |
1408 (chan_addr & 0xfff);
1410 /* remove channel interleave */
1411 if (dct_interleave_enabled(pvt) &&
1412 !dct_high_range_enabled(pvt) &&
1413 !dct_ganging_enabled(pvt)) {
1415 if (dct_sel_interleave_addr(pvt) != 1) {
1416 if (dct_sel_interleave_addr(pvt) == 0x3)
1418 chan_addr = ((chan_addr >> 10) << 9) |
1419 (chan_addr & 0x1ff);
1421 /* A[6] or hash 6 */
1422 chan_addr = ((chan_addr >> 7) << 6) |
1426 chan_addr = ((chan_addr >> 13) << 12) |
1427 (chan_addr & 0xfff);
1430 debugf1(" Normalized DCT addr: 0x%llx\n", chan_addr);
1432 cs_found = f10_lookup_addr_in_dct(chan_addr, node_id, channel);
1434 if (cs_found >= 0) {
1436 *chan_sel = channel;
1441 static int f10_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
1442 int *node, int *chan_sel)
1444 int range, cs_found = -EINVAL;
1446 for (range = 0; range < DRAM_RANGES; range++) {
1448 if (!dram_rw(pvt, range))
1451 if ((get_dram_base(pvt, range) <= sys_addr) &&
1452 (get_dram_limit(pvt, range) >= sys_addr)) {
1454 cs_found = f10_match_to_this_node(pvt, range,
1465 * For reference see "2.8.5 Routing DRAM Requests" in F10 BKDG. This code maps
1466 * a @sys_addr to NodeID, DCT (channel) and chip select (CSROW).
1468 * The @sys_addr is usually an error address received from the hardware
1471 static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
1474 struct amd64_pvt *pvt = mci->pvt_info;
1476 int nid, csrow, chan = 0;
1478 csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
1481 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1485 error_address_to_page_and_offset(sys_addr, &page, &offset);
1488 * We need the syndromes for channel detection only when we're
1489 * ganged. Otherwise @chan should already contain the channel at
1492 if (dct_ganging_enabled(pvt))
1493 chan = get_channel_from_ecc_syndrome(mci, syndrome);
1496 edac_mc_handle_ce(mci, page, offset, syndrome, csrow, chan,
1500 * Channel unknown, report all channels on this CSROW as failed.
1502 for (chan = 0; chan < mci->csrows[csrow].nr_channels; chan++)
1503 edac_mc_handle_ce(mci, page, offset, syndrome,
1504 csrow, chan, EDAC_MOD_STR);
1508 * debug routine to display the memory sizes of all logical DIMMs and its
1511 static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt)
1513 int dimm, size0, size1, factor = 0;
1514 u32 *dcsb = ctrl ? pvt->csels[1].csbases : pvt->csels[0].csbases;
1515 u32 dbam = ctrl ? pvt->dbam1 : pvt->dbam0;
1517 if (boot_cpu_data.x86 == 0xf) {
1518 if (pvt->dclr0 & F10_WIDTH_128)
1521 /* K8 families < revF not supported yet */
1522 if (pvt->ext_model < K8_REV_F)
1528 dbam = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->dbam1 : pvt->dbam0;
1529 dcsb = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->csels[1].csbases
1530 : pvt->csels[0].csbases;
1532 debugf1("F2x%d80 (DRAM Bank Address Mapping): 0x%08x\n", ctrl, dbam);
1534 edac_printk(KERN_DEBUG, EDAC_MC, "DCT%d chip selects:\n", ctrl);
1536 /* Dump memory sizes for DIMM and its CSROWs */
1537 for (dimm = 0; dimm < 4; dimm++) {
1540 if (dcsb[dimm*2] & DCSB_CS_ENABLE)
1541 size0 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
1544 if (dcsb[dimm*2 + 1] & DCSB_CS_ENABLE)
1545 size1 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
1547 amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
1548 dimm * 2, size0 << factor,
1549 dimm * 2 + 1, size1 << factor);
1553 static struct amd64_family_type amd64_family_types[] = {
1556 .f1_id = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
1557 .f3_id = PCI_DEVICE_ID_AMD_K8_NB_MISC,
1559 .early_channel_count = k8_early_channel_count,
1560 .map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
1561 .dbam_to_cs = k8_dbam_to_chip_select,
1562 .read_dct_pci_cfg = k8_read_dct_pci_cfg,
1567 .f1_id = PCI_DEVICE_ID_AMD_10H_NB_MAP,
1568 .f3_id = PCI_DEVICE_ID_AMD_10H_NB_MISC,
1570 .early_channel_count = f1x_early_channel_count,
1571 .read_dram_ctl_register = f10_read_dram_ctl_register,
1572 .map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow,
1573 .dbam_to_cs = f10_dbam_to_chip_select,
1574 .read_dct_pci_cfg = f10_read_dct_pci_cfg,
1580 .early_channel_count = f1x_early_channel_count,
1581 .read_dct_pci_cfg = f15_read_dct_pci_cfg,
1586 static struct pci_dev *pci_get_related_function(unsigned int vendor,
1587 unsigned int device,
1588 struct pci_dev *related)
1590 struct pci_dev *dev = NULL;
1592 dev = pci_get_device(vendor, device, dev);
1594 if ((dev->bus->number == related->bus->number) &&
1595 (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
1597 dev = pci_get_device(vendor, device, dev);
1604 * These are tables of eigenvectors (one per line) which can be used for the
1605 * construction of the syndrome tables. The modified syndrome search algorithm
1606 * uses those to find the symbol in error and thus the DIMM.
1608 * Algorithm courtesy of Ross LaFetra from AMD.
1610 static u16 x4_vectors[] = {
1611 0x2f57, 0x1afe, 0x66cc, 0xdd88,
1612 0x11eb, 0x3396, 0x7f4c, 0xeac8,
1613 0x0001, 0x0002, 0x0004, 0x0008,
1614 0x1013, 0x3032, 0x4044, 0x8088,
1615 0x106b, 0x30d6, 0x70fc, 0xe0a8,
1616 0x4857, 0xc4fe, 0x13cc, 0x3288,
1617 0x1ac5, 0x2f4a, 0x5394, 0xa1e8,
1618 0x1f39, 0x251e, 0xbd6c, 0x6bd8,
1619 0x15c1, 0x2a42, 0x89ac, 0x4758,
1620 0x2b03, 0x1602, 0x4f0c, 0xca08,
1621 0x1f07, 0x3a0e, 0x6b04, 0xbd08,
1622 0x8ba7, 0x465e, 0x244c, 0x1cc8,
1623 0x2b87, 0x164e, 0x642c, 0xdc18,
1624 0x40b9, 0x80de, 0x1094, 0x20e8,
1625 0x27db, 0x1eb6, 0x9dac, 0x7b58,
1626 0x11c1, 0x2242, 0x84ac, 0x4c58,
1627 0x1be5, 0x2d7a, 0x5e34, 0xa718,
1628 0x4b39, 0x8d1e, 0x14b4, 0x28d8,
1629 0x4c97, 0xc87e, 0x11fc, 0x33a8,
1630 0x8e97, 0x497e, 0x2ffc, 0x1aa8,
1631 0x16b3, 0x3d62, 0x4f34, 0x8518,
1632 0x1e2f, 0x391a, 0x5cac, 0xf858,
1633 0x1d9f, 0x3b7a, 0x572c, 0xfe18,
1634 0x15f5, 0x2a5a, 0x5264, 0xa3b8,
1635 0x1dbb, 0x3b66, 0x715c, 0xe3f8,
1636 0x4397, 0xc27e, 0x17fc, 0x3ea8,
1637 0x1617, 0x3d3e, 0x6464, 0xb8b8,
1638 0x23ff, 0x12aa, 0xab6c, 0x56d8,
1639 0x2dfb, 0x1ba6, 0x913c, 0x7328,
1640 0x185d, 0x2ca6, 0x7914, 0x9e28,
1641 0x171b, 0x3e36, 0x7d7c, 0xebe8,
1642 0x4199, 0x82ee, 0x19f4, 0x2e58,
1643 0x4807, 0xc40e, 0x130c, 0x3208,
1644 0x1905, 0x2e0a, 0x5804, 0xac08,
1645 0x213f, 0x132a, 0xadfc, 0x5ba8,
1646 0x19a9, 0x2efe, 0xb5cc, 0x6f88,
1649 static u16 x8_vectors[] = {
1650 0x0145, 0x028a, 0x2374, 0x43c8, 0xa1f0, 0x0520, 0x0a40, 0x1480,
1651 0x0211, 0x0422, 0x0844, 0x1088, 0x01b0, 0x44e0, 0x23c0, 0xed80,
1652 0x1011, 0x0116, 0x022c, 0x0458, 0x08b0, 0x8c60, 0x2740, 0x4e80,
1653 0x0411, 0x0822, 0x1044, 0x0158, 0x02b0, 0x2360, 0x46c0, 0xab80,
1654 0x0811, 0x1022, 0x012c, 0x0258, 0x04b0, 0x4660, 0x8cc0, 0x2780,
1655 0x2071, 0x40e2, 0xa0c4, 0x0108, 0x0210, 0x0420, 0x0840, 0x1080,
1656 0x4071, 0x80e2, 0x0104, 0x0208, 0x0410, 0x0820, 0x1040, 0x2080,
1657 0x8071, 0x0102, 0x0204, 0x0408, 0x0810, 0x1020, 0x2040, 0x4080,
1658 0x019d, 0x03d6, 0x136c, 0x2198, 0x50b0, 0xb2e0, 0x0740, 0x0e80,
1659 0x0189, 0x03ea, 0x072c, 0x0e58, 0x1cb0, 0x56e0, 0x37c0, 0xf580,
1660 0x01fd, 0x0376, 0x06ec, 0x0bb8, 0x1110, 0x2220, 0x4440, 0x8880,
1661 0x0163, 0x02c6, 0x1104, 0x0758, 0x0eb0, 0x2be0, 0x6140, 0xc280,
1662 0x02fd, 0x01c6, 0x0b5c, 0x1108, 0x07b0, 0x25a0, 0x8840, 0x6180,
1663 0x0801, 0x012e, 0x025c, 0x04b8, 0x1370, 0x26e0, 0x57c0, 0xb580,
1664 0x0401, 0x0802, 0x015c, 0x02b8, 0x22b0, 0x13e0, 0x7140, 0xe280,
1665 0x0201, 0x0402, 0x0804, 0x01b8, 0x11b0, 0x31a0, 0x8040, 0x7180,
1666 0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080,
1667 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
1668 0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000,
1671 static int decode_syndrome(u16 syndrome, u16 *vectors, int num_vecs,
1674 unsigned int i, err_sym;
1676 for (err_sym = 0; err_sym < num_vecs / v_dim; err_sym++) {
1678 int v_idx = err_sym * v_dim;
1679 int v_end = (err_sym + 1) * v_dim;
1681 /* walk over all 16 bits of the syndrome */
1682 for (i = 1; i < (1U << 16); i <<= 1) {
1684 /* if bit is set in that eigenvector... */
1685 if (v_idx < v_end && vectors[v_idx] & i) {
1686 u16 ev_comp = vectors[v_idx++];
1688 /* ... and bit set in the modified syndrome, */
1698 /* can't get to zero, move to next symbol */
1703 debugf0("syndrome(%x) not found\n", syndrome);
1707 static int map_err_sym_to_channel(int err_sym, int sym_size)
1720 return err_sym >> 4;
1726 /* imaginary bits not in a DIMM */
1728 WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
1740 return err_sym >> 3;
1746 static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
1748 struct amd64_pvt *pvt = mci->pvt_info;
1751 if (pvt->syn_type == 8)
1752 err_sym = decode_syndrome(syndrome, x8_vectors,
1753 ARRAY_SIZE(x8_vectors),
1755 else if (pvt->syn_type == 4)
1756 err_sym = decode_syndrome(syndrome, x4_vectors,
1757 ARRAY_SIZE(x4_vectors),
1760 amd64_warn("Illegal syndrome type: %u\n", pvt->syn_type);
1764 return map_err_sym_to_channel(err_sym, pvt->syn_type);
1768 * Handle any Correctable Errors (CEs) that have occurred. Check for valid ERROR
1769 * ADDRESS and process.
1771 static void amd64_handle_ce(struct mem_ctl_info *mci, struct mce *m)
1773 struct amd64_pvt *pvt = mci->pvt_info;
1777 /* Ensure that the Error Address is VALID */
1778 if (!(m->status & MCI_STATUS_ADDRV)) {
1779 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1780 edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
1784 sys_addr = get_error_address(m);
1785 syndrome = extract_syndrome(m->status);
1787 amd64_mc_err(mci, "CE ERROR_ADDRESS= 0x%llx\n", sys_addr);
1789 pvt->ops->map_sysaddr_to_csrow(mci, sys_addr, syndrome);
1792 /* Handle any Un-correctable Errors (UEs) */
1793 static void amd64_handle_ue(struct mem_ctl_info *mci, struct mce *m)
1795 struct mem_ctl_info *log_mci, *src_mci = NULL;
1802 if (!(m->status & MCI_STATUS_ADDRV)) {
1803 amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
1804 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1808 sys_addr = get_error_address(m);
1811 * Find out which node the error address belongs to. This may be
1812 * different from the node that detected the error.
1814 src_mci = find_mc_by_sys_addr(mci, sys_addr);
1816 amd64_mc_err(mci, "ERROR ADDRESS (0x%lx) NOT mapped to a MC\n",
1817 (unsigned long)sys_addr);
1818 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1824 csrow = sys_addr_to_csrow(log_mci, sys_addr);
1826 amd64_mc_err(mci, "ERROR_ADDRESS (0x%lx) NOT mapped to CS\n",
1827 (unsigned long)sys_addr);
1828 edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
1830 error_address_to_page_and_offset(sys_addr, &page, &offset);
1831 edac_mc_handle_ue(log_mci, page, offset, csrow, EDAC_MOD_STR);
1835 static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
1838 u16 ec = EC(m->status);
1839 u8 xec = XEC(m->status, 0x1f);
1840 u8 ecc_type = (m->status >> 45) & 0x3;
1842 /* Bail early out if this was an 'observed' error */
1843 if (PP(ec) == NBSL_PP_OBS)
1846 /* Do only ECC errors */
1847 if (xec && xec != F10_NBSL_EXT_ERR_ECC)
1851 amd64_handle_ce(mci, m);
1852 else if (ecc_type == 1)
1853 amd64_handle_ue(mci, m);
1856 void amd64_decode_bus_error(int node_id, struct mce *m, u32 nbcfg)
1858 struct mem_ctl_info *mci = mcis[node_id];
1860 __amd64_decode_bus_error(mci, m);
1864 * Use pvt->F2 which contains the F2 CPU PCI device to get the related
1865 * F1 (AddrMap) and F3 (Misc) devices. Return negative value on error.
1867 static int reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 f1_id, u16 f3_id)
1869 /* Reserve the ADDRESS MAP Device */
1870 pvt->F1 = pci_get_related_function(pvt->F2->vendor, f1_id, pvt->F2);
1872 amd64_err("error address map device not found: "
1873 "vendor %x device 0x%x (broken BIOS?)\n",
1874 PCI_VENDOR_ID_AMD, f1_id);
1878 /* Reserve the MISC Device */
1879 pvt->F3 = pci_get_related_function(pvt->F2->vendor, f3_id, pvt->F2);
1881 pci_dev_put(pvt->F1);
1884 amd64_err("error F3 device not found: "
1885 "vendor %x device 0x%x (broken BIOS?)\n",
1886 PCI_VENDOR_ID_AMD, f3_id);
1890 debugf1("F1: %s\n", pci_name(pvt->F1));
1891 debugf1("F2: %s\n", pci_name(pvt->F2));
1892 debugf1("F3: %s\n", pci_name(pvt->F3));
1897 static void free_mc_sibling_devs(struct amd64_pvt *pvt)
1899 pci_dev_put(pvt->F1);
1900 pci_dev_put(pvt->F3);
1904 * Retrieve the hardware registers of the memory controller (this includes the
1905 * 'Address Map' and 'Misc' device regs)
1907 static void read_mc_regs(struct amd64_pvt *pvt)
1914 * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since
1915 * those are Read-As-Zero
1917 rdmsrl(MSR_K8_TOP_MEM1, pvt->top_mem);
1918 debugf0(" TOP_MEM: 0x%016llx\n", pvt->top_mem);
1920 /* check first whether TOP_MEM2 is enabled */
1921 rdmsrl(MSR_K8_SYSCFG, msr_val);
1922 if (msr_val & (1U << 21)) {
1923 rdmsrl(MSR_K8_TOP_MEM2, pvt->top_mem2);
1924 debugf0(" TOP_MEM2: 0x%016llx\n", pvt->top_mem2);
1926 debugf0(" TOP_MEM2 disabled.\n");
1928 amd64_read_pci_cfg(pvt->F3, NBCAP, &pvt->nbcap);
1930 if (pvt->ops->read_dram_ctl_register)
1931 pvt->ops->read_dram_ctl_register(pvt);
1933 for (range = 0; range < DRAM_RANGES; range++) {
1936 /* read settings for this DRAM range */
1937 read_dram_base_limit_regs(pvt, range);
1939 rw = dram_rw(pvt, range);
1943 debugf1(" DRAM range[%d], base: 0x%016llx; limit: 0x%016llx\n",
1945 get_dram_base(pvt, range),
1946 get_dram_limit(pvt, range));
1948 debugf1(" IntlvEn=%s; Range access: %s%s IntlvSel=%d DstNode=%d\n",
1949 dram_intlv_en(pvt, range) ? "Enabled" : "Disabled",
1950 (rw & 0x1) ? "R" : "-",
1951 (rw & 0x2) ? "W" : "-",
1952 dram_intlv_sel(pvt, range),
1953 dram_dst_node(pvt, range));
1956 read_dct_base_mask(pvt);
1958 amd64_read_pci_cfg(pvt->F1, DHAR, &pvt->dhar);
1959 amd64_read_dct_pci_cfg(pvt, DBAM0, &pvt->dbam0);
1961 amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
1963 amd64_read_dct_pci_cfg(pvt, DCLR0, &pvt->dclr0);
1964 amd64_read_dct_pci_cfg(pvt, DCHR0, &pvt->dchr0);
1966 if (!dct_ganging_enabled(pvt)) {
1967 amd64_read_dct_pci_cfg(pvt, DCLR1, &pvt->dclr1);
1968 amd64_read_dct_pci_cfg(pvt, DCHR1, &pvt->dchr1);
1971 if (boot_cpu_data.x86 >= 0x10) {
1972 amd64_read_pci_cfg(pvt->F3, EXT_NB_MCA_CFG, &tmp);
1973 amd64_read_dct_pci_cfg(pvt, DBAM1, &pvt->dbam1);
1976 if (boot_cpu_data.x86 == 0x10 &&
1977 boot_cpu_data.x86_model > 7 &&
1978 /* F3x180[EccSymbolSize]=1 => x8 symbols */
1984 dump_misc_regs(pvt);
1988 * NOTE: CPU Revision Dependent code
1991 * @csrow_nr ChipSelect Row Number (0..NUM_CHIPSELECTS-1)
1992 * k8 private pointer to -->
1993 * DRAM Bank Address mapping register
1995 * DCL register where dual_channel_active is
1997 * The DBAM register consists of 4 sets of 4 bits each definitions:
2000 * 0-3 CSROWs 0 and 1
2001 * 4-7 CSROWs 2 and 3
2002 * 8-11 CSROWs 4 and 5
2003 * 12-15 CSROWs 6 and 7
2005 * Values range from: 0 to 15
2006 * The meaning of the values depends on CPU revision and dual-channel state,
2007 * see relevant BKDG more info.
2009 * The memory controller provides for total of only 8 CSROWs in its current
2010 * architecture. Each "pair" of CSROWs normally represents just one DIMM in
2011 * single channel or two (2) DIMMs in dual channel mode.
2013 * The following code logic collapses the various tables for CSROW based on CPU
2017 * The number of PAGE_SIZE pages on the specified CSROW number it
2021 static u32 amd64_csrow_nr_pages(int csrow_nr, struct amd64_pvt *pvt)
2023 u32 cs_mode, nr_pages;
2026 * The math on this doesn't look right on the surface because x/2*4 can
2027 * be simplified to x*2 but this expression makes use of the fact that
2028 * it is integral math where 1/2=0. This intermediate value becomes the
2029 * number of bits to shift the DBAM register to extract the proper CSROW
2032 cs_mode = (pvt->dbam0 >> ((csrow_nr / 2) * 4)) & 0xF;
2034 nr_pages = pvt->ops->dbam_to_cs(pvt, cs_mode) << (20 - PAGE_SHIFT);
2037 * If dual channel then double the memory size of single channel.
2038 * Channel count is 1 or 2
2040 nr_pages <<= (pvt->channel_count - 1);
2042 debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode);
2043 debugf0(" nr_pages= %u channel-count = %d\n",
2044 nr_pages, pvt->channel_count);
2050 * Initialize the array of csrow attribute instances, based on the values
2051 * from pci config hardware registers.
2053 static int init_csrows(struct mem_ctl_info *mci)
2055 struct csrow_info *csrow;
2056 struct amd64_pvt *pvt = mci->pvt_info;
2057 u64 input_addr_min, input_addr_max, sys_addr, base, mask;
2061 amd64_read_pci_cfg(pvt->F3, NBCFG, &val);
2065 debugf0("node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
2066 pvt->mc_node_id, val,
2067 !!(val & NBCFG_CHIPKILL), !!(val & NBCFG_ECC_ENABLE));
2069 for_each_chip_select(i, 0, pvt) {
2070 csrow = &mci->csrows[i];
2072 if (!csrow_enabled(i, 0, pvt)) {
2073 debugf1("----CSROW %d EMPTY for node %d\n", i,
2078 debugf1("----CSROW %d VALID for MC node %d\n",
2079 i, pvt->mc_node_id);
2082 csrow->nr_pages = amd64_csrow_nr_pages(i, pvt);
2083 find_csrow_limits(mci, i, &input_addr_min, &input_addr_max);
2084 sys_addr = input_addr_to_sys_addr(mci, input_addr_min);
2085 csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT);
2086 sys_addr = input_addr_to_sys_addr(mci, input_addr_max);
2087 csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT);
2089 get_cs_base_and_mask(pvt, i, 0, &base, &mask);
2090 csrow->page_mask = ~mask;
2091 /* 8 bytes of resolution */
2093 csrow->mtype = amd64_determine_memory_type(pvt, i);
2095 debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i);
2096 debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n",
2097 (unsigned long)input_addr_min,
2098 (unsigned long)input_addr_max);
2099 debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n",
2100 (unsigned long)sys_addr, csrow->page_mask);
2101 debugf1(" nr_pages: %u first_page: 0x%lx "
2102 "last_page: 0x%lx\n",
2103 (unsigned)csrow->nr_pages,
2104 csrow->first_page, csrow->last_page);
2107 * determine whether CHIPKILL or JUST ECC or NO ECC is operating
2109 if (pvt->nbcfg & NBCFG_ECC_ENABLE)
2111 (pvt->nbcfg & NBCFG_CHIPKILL) ?
2112 EDAC_S4ECD4ED : EDAC_SECDED;
2114 csrow->edac_mode = EDAC_NONE;
2120 /* get all cores on this DCT */
2121 static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, int nid)
2125 for_each_online_cpu(cpu)
2126 if (amd_get_nb_id(cpu) == nid)
2127 cpumask_set_cpu(cpu, mask);
2130 /* check MCG_CTL on all the cpus on this node */
2131 static bool amd64_nb_mce_bank_enabled_on_node(int nid)
2137 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
2138 amd64_warn("%s: Error allocating mask\n", __func__);
2142 get_cpus_on_this_dct_cpumask(mask, nid);
2144 rdmsr_on_cpus(mask, MSR_IA32_MCG_CTL, msrs);
2146 for_each_cpu(cpu, mask) {
2147 struct msr *reg = per_cpu_ptr(msrs, cpu);
2148 nbe = reg->l & MSR_MCGCTL_NBE;
2150 debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
2152 (nbe ? "enabled" : "disabled"));
2160 free_cpumask_var(mask);
2164 static int toggle_ecc_err_reporting(struct ecc_settings *s, u8 nid, bool on)
2166 cpumask_var_t cmask;
2169 if (!zalloc_cpumask_var(&cmask, GFP_KERNEL)) {
2170 amd64_warn("%s: error allocating mask\n", __func__);
2174 get_cpus_on_this_dct_cpumask(cmask, nid);
2176 rdmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2178 for_each_cpu(cpu, cmask) {
2180 struct msr *reg = per_cpu_ptr(msrs, cpu);
2183 if (reg->l & MSR_MCGCTL_NBE)
2184 s->flags.nb_mce_enable = 1;
2186 reg->l |= MSR_MCGCTL_NBE;
2189 * Turn off NB MCE reporting only when it was off before
2191 if (!s->flags.nb_mce_enable)
2192 reg->l &= ~MSR_MCGCTL_NBE;
2195 wrmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
2197 free_cpumask_var(cmask);
2202 static bool enable_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2206 u32 value, mask = 0x3; /* UECC/CECC enable */
2208 if (toggle_ecc_err_reporting(s, nid, ON)) {
2209 amd64_warn("Error enabling ECC reporting over MCGCTL!\n");
2213 amd64_read_pci_cfg(F3, NBCTL, &value);
2215 s->old_nbctl = value & mask;
2216 s->nbctl_valid = true;
2219 amd64_write_pci_cfg(F3, NBCTL, value);
2221 amd64_read_pci_cfg(F3, NBCFG, &value);
2223 debugf0("1: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
2224 nid, value, !!(value & NBCFG_ECC_ENABLE));
2226 if (!(value & NBCFG_ECC_ENABLE)) {
2227 amd64_warn("DRAM ECC disabled on this node, enabling...\n");
2229 s->flags.nb_ecc_prev = 0;
2231 /* Attempt to turn on DRAM ECC Enable */
2232 value |= NBCFG_ECC_ENABLE;
2233 amd64_write_pci_cfg(F3, NBCFG, value);
2235 amd64_read_pci_cfg(F3, NBCFG, &value);
2237 if (!(value & NBCFG_ECC_ENABLE)) {
2238 amd64_warn("Hardware rejected DRAM ECC enable,"
2239 "check memory DIMM configuration.\n");
2242 amd64_info("Hardware accepted DRAM ECC Enable\n");
2245 s->flags.nb_ecc_prev = 1;
2248 debugf0("2: node %d, NBCFG=0x%08x[DramEccEn: %d]\n",
2249 nid, value, !!(value & NBCFG_ECC_ENABLE));
2254 static void restore_ecc_error_reporting(struct ecc_settings *s, u8 nid,
2257 u32 value, mask = 0x3; /* UECC/CECC enable */
2260 if (!s->nbctl_valid)
2263 amd64_read_pci_cfg(F3, NBCTL, &value);
2265 value |= s->old_nbctl;
2267 amd64_write_pci_cfg(F3, NBCTL, value);
2269 /* restore previous BIOS DRAM ECC "off" setting we force-enabled */
2270 if (!s->flags.nb_ecc_prev) {
2271 amd64_read_pci_cfg(F3, NBCFG, &value);
2272 value &= ~NBCFG_ECC_ENABLE;
2273 amd64_write_pci_cfg(F3, NBCFG, value);
2276 /* restore the NB Enable MCGCTL bit */
2277 if (toggle_ecc_err_reporting(s, nid, OFF))
2278 amd64_warn("Error restoring NB MCGCTL settings!\n");
2282 * EDAC requires that the BIOS have ECC enabled before
2283 * taking over the processing of ECC errors. A command line
2284 * option allows to force-enable hardware ECC later in
2285 * enable_ecc_error_reporting().
2287 static const char *ecc_msg =
2288 "ECC disabled in the BIOS or no ECC capability, module will not load.\n"
2289 " Either enable ECC checking or force module loading by setting "
2290 "'ecc_enable_override'.\n"
2291 " (Note that use of the override may cause unknown side effects.)\n";
2293 static bool ecc_enabled(struct pci_dev *F3, u8 nid)
2297 bool nb_mce_en = false;
2299 amd64_read_pci_cfg(F3, NBCFG, &value);
2301 ecc_en = !!(value & NBCFG_ECC_ENABLE);
2302 amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
2304 nb_mce_en = amd64_nb_mce_bank_enabled_on_node(nid);
2306 amd64_notice("NB MCE bank disabled, set MSR "
2307 "0x%08x[4] on node %d to enable.\n",
2308 MSR_IA32_MCG_CTL, nid);
2310 if (!ecc_en || !nb_mce_en) {
2311 amd64_notice("%s", ecc_msg);
2317 struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +
2318 ARRAY_SIZE(amd64_inj_attrs) +
2321 struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } };
2323 static void set_mc_sysfs_attrs(struct mem_ctl_info *mci)
2325 unsigned int i = 0, j = 0;
2327 for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)
2328 sysfs_attrs[i] = amd64_dbg_attrs[i];
2330 if (boot_cpu_data.x86 >= 0x10)
2331 for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)
2332 sysfs_attrs[i] = amd64_inj_attrs[j];
2334 sysfs_attrs[i] = terminator;
2336 mci->mc_driver_sysfs_attributes = sysfs_attrs;
2339 static void setup_mci_misc_attrs(struct mem_ctl_info *mci)
2341 struct amd64_pvt *pvt = mci->pvt_info;
2343 mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;
2344 mci->edac_ctl_cap = EDAC_FLAG_NONE;
2346 if (pvt->nbcap & NBCAP_SECDED)
2347 mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
2349 if (pvt->nbcap & NBCAP_CHIPKILL)
2350 mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
2352 mci->edac_cap = amd64_determine_edac_cap(pvt);
2353 mci->mod_name = EDAC_MOD_STR;
2354 mci->mod_ver = EDAC_AMD64_VERSION;
2355 mci->ctl_name = pvt->ctl_name;
2356 mci->dev_name = pci_name(pvt->F2);
2357 mci->ctl_page_to_phys = NULL;
2359 /* memory scrubber interface */
2360 mci->set_sdram_scrub_rate = amd64_set_scrub_rate;
2361 mci->get_sdram_scrub_rate = amd64_get_scrub_rate;
2365 * returns a pointer to the family descriptor on success, NULL otherwise.
2367 static struct amd64_family_type *amd64_per_family_init(struct amd64_pvt *pvt)
2369 u8 fam = boot_cpu_data.x86;
2370 struct amd64_family_type *fam_type = NULL;
2374 fam_type = &amd64_family_types[K8_CPUS];
2375 pvt->ops = &amd64_family_types[K8_CPUS].ops;
2376 pvt->ctl_name = fam_type->ctl_name;
2377 pvt->min_scrubrate = K8_MIN_SCRUB_RATE_BITS;
2380 fam_type = &amd64_family_types[F10_CPUS];
2381 pvt->ops = &amd64_family_types[F10_CPUS].ops;
2382 pvt->ctl_name = fam_type->ctl_name;
2383 pvt->min_scrubrate = F10_MIN_SCRUB_RATE_BITS;
2387 amd64_err("Unsupported family!\n");
2391 pvt->ext_model = boot_cpu_data.x86_model >> 4;
2393 amd64_info("%s %sdetected (node %d).\n", pvt->ctl_name,
2395 (pvt->ext_model >= K8_REV_F ? "revF or later "
2396 : "revE or earlier ")
2397 : ""), pvt->mc_node_id);
2401 static int amd64_init_one_instance(struct pci_dev *F2)
2403 struct amd64_pvt *pvt = NULL;
2404 struct amd64_family_type *fam_type = NULL;
2405 struct mem_ctl_info *mci = NULL;
2407 u8 nid = get_node_id(F2);
2410 pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
2414 pvt->mc_node_id = nid;
2418 fam_type = amd64_per_family_init(pvt);
2423 err = reserve_mc_sibling_devs(pvt, fam_type->f1_id, fam_type->f3_id);
2430 * We need to determine how many memory channels there are. Then use
2431 * that information for calculating the size of the dynamic instance
2432 * tables in the 'mci' structure.
2435 pvt->channel_count = pvt->ops->early_channel_count(pvt);
2436 if (pvt->channel_count < 0)
2440 mci = edac_mc_alloc(0, pvt->csels[0].b_cnt, pvt->channel_count, nid);
2444 mci->pvt_info = pvt;
2445 mci->dev = &pvt->F2->dev;
2447 setup_mci_misc_attrs(mci);
2449 if (init_csrows(mci))
2450 mci->edac_cap = EDAC_FLAG_NONE;
2452 set_mc_sysfs_attrs(mci);
2455 if (edac_mc_add_mc(mci)) {
2456 debugf1("failed edac_mc_add_mc()\n");
2460 /* register stuff with EDAC MCE */
2461 if (report_gart_errors)
2462 amd_report_gart_errors(true);
2464 amd_register_ecc_decoder(amd64_decode_bus_error);
2468 atomic_inc(&drv_instances);
2476 free_mc_sibling_devs(pvt);
2485 static int __devinit amd64_probe_one_instance(struct pci_dev *pdev,
2486 const struct pci_device_id *mc_type)
2488 u8 nid = get_node_id(pdev);
2489 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2490 struct ecc_settings *s;
2493 ret = pci_enable_device(pdev);
2495 debugf0("ret=%d\n", ret);
2500 s = kzalloc(sizeof(struct ecc_settings), GFP_KERNEL);
2506 if (!ecc_enabled(F3, nid)) {
2509 if (!ecc_enable_override)
2512 amd64_warn("Forcing ECC on!\n");
2514 if (!enable_ecc_error_reporting(s, nid, F3))
2518 ret = amd64_init_one_instance(pdev);
2520 amd64_err("Error probing instance: %d\n", nid);
2521 restore_ecc_error_reporting(s, nid, F3);
2528 ecc_stngs[nid] = NULL;
2534 static void __devexit amd64_remove_one_instance(struct pci_dev *pdev)
2536 struct mem_ctl_info *mci;
2537 struct amd64_pvt *pvt;
2538 u8 nid = get_node_id(pdev);
2539 struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
2540 struct ecc_settings *s = ecc_stngs[nid];
2542 /* Remove from EDAC CORE tracking list */
2543 mci = edac_mc_del_mc(&pdev->dev);
2547 pvt = mci->pvt_info;
2549 restore_ecc_error_reporting(s, nid, F3);
2551 free_mc_sibling_devs(pvt);
2553 /* unregister from EDAC MCE */
2554 amd_report_gart_errors(false);
2555 amd_unregister_ecc_decoder(amd64_decode_bus_error);
2557 kfree(ecc_stngs[nid]);
2558 ecc_stngs[nid] = NULL;
2560 /* Free the EDAC CORE resources */
2561 mci->pvt_info = NULL;
2569 * This table is part of the interface for loading drivers for PCI devices. The
2570 * PCI core identifies what devices are on a system during boot, and then
2571 * inquiry this table to see if this driver is for a given device found.
2573 static const struct pci_device_id amd64_pci_table[] __devinitdata = {
2575 .vendor = PCI_VENDOR_ID_AMD,
2576 .device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
2577 .subvendor = PCI_ANY_ID,
2578 .subdevice = PCI_ANY_ID,
2583 .vendor = PCI_VENDOR_ID_AMD,
2584 .device = PCI_DEVICE_ID_AMD_10H_NB_DRAM,
2585 .subvendor = PCI_ANY_ID,
2586 .subdevice = PCI_ANY_ID,
2592 MODULE_DEVICE_TABLE(pci, amd64_pci_table);
2594 static struct pci_driver amd64_pci_driver = {
2595 .name = EDAC_MOD_STR,
2596 .probe = amd64_probe_one_instance,
2597 .remove = __devexit_p(amd64_remove_one_instance),
2598 .id_table = amd64_pci_table,
2601 static void setup_pci_device(void)
2603 struct mem_ctl_info *mci;
2604 struct amd64_pvt *pvt;
2612 pvt = mci->pvt_info;
2614 edac_pci_create_generic_ctl(&pvt->F2->dev, EDAC_MOD_STR);
2616 if (!amd64_ctl_pci) {
2617 pr_warning("%s(): Unable to create PCI control\n",
2620 pr_warning("%s(): PCI error report via EDAC not set\n",
2626 static int __init amd64_edac_init(void)
2630 edac_printk(KERN_INFO, EDAC_MOD_STR, EDAC_AMD64_VERSION "\n");
2634 if (amd_cache_northbridges() < 0)
2638 mcis = kzalloc(amd_nb_num() * sizeof(mcis[0]), GFP_KERNEL);
2639 ecc_stngs = kzalloc(amd_nb_num() * sizeof(ecc_stngs[0]), GFP_KERNEL);
2640 if (!(mcis && ecc_stngs))
2643 msrs = msrs_alloc();
2647 err = pci_register_driver(&amd64_pci_driver);
2652 if (!atomic_read(&drv_instances))
2653 goto err_no_instances;
2659 pci_unregister_driver(&amd64_pci_driver);
2676 static void __exit amd64_edac_exit(void)
2679 edac_pci_release_generic_ctl(amd64_ctl_pci);
2681 pci_unregister_driver(&amd64_pci_driver);
2693 module_init(amd64_edac_init);
2694 module_exit(amd64_edac_exit);
2696 MODULE_LICENSE("GPL");
2697 MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "
2698 "Dave Peterson, Thayne Harbaugh");
2699 MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "
2700 EDAC_AMD64_VERSION);
2702 module_param(edac_op_state, int, 0444);
2703 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");