diff options
| -rw-r--r-- | MAINTAINERS | 10 | ||||
| -rw-r--r-- | arch/x86/include/asm/msr.h | 23 | ||||
| -rw-r--r-- | arch/x86/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/lib/msr-on-cpu.c | 97 | ||||
| -rw-r--r-- | arch/x86/lib/msr.c | 183 | ||||
| -rw-r--r-- | drivers/edac/Kconfig | 26 | ||||
| -rw-r--r-- | drivers/edac/Makefile | 7 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac.c | 3354 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac.h | 644 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac_dbg.c | 255 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac_err_types.c | 161 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac_inj.c | 185 | ||||
| -rw-r--r-- | drivers/edac/edac_core.h | 9 |
13 files changed, 4853 insertions, 103 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 84285b5ba359..ccdb57524e3c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1979,6 +1979,16 @@ F: Documentation/edac.txt F: drivers/edac/edac_* F: include/linux/edac.h +EDAC-AMD64 +P: Doug Thompson +M: dougthompson@xmission.com +P: Borislav Petkov +M: borislav.petkov@amd.com +L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers) +W: bluesmoke.sourceforge.net +S: Supported +F: drivers/edac/amd64_edac* + EDAC-E752X P: Mark Gross M: mark.gross@intel.com diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index 638bf6241807..22603764e7db 100644 --- a/arch/x86/include/asm/msr.h +++ b/arch/x86/include/asm/msr.h @@ -12,6 +12,17 @@ #include <asm/asm.h> #include <asm/errno.h> +#include <asm/cpumask.h> + +struct msr { + union { + struct { + u32 l; + u32 h; + }; + u64 q; + }; +}; static inline unsigned long long native_read_tscp(unsigned int *aux) { @@ -216,6 +227,8 @@ do { \ #ifdef CONFIG_SMP int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); +void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs); +void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs); int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); #else /* CONFIG_SMP */ @@ -229,6 +242,16 @@ static inline int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) wrmsr(msr_no, l, h); return 0; } +static inline void rdmsr_on_cpus(const cpumask_t *m, u32 msr_no, + struct msr *msrs) +{ + rdmsr_on_cpu(0, msr_no, &(msrs[0].l), &(msrs[0].h)); +} +static inline void wrmsr_on_cpus(const cpumask_t *m, u32 msr_no, + struct msr *msrs) +{ + wrmsr_on_cpu(0, msr_no, msrs[0].l, msrs[0].h); +} static inline int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) { diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index 55e11aa6d66c..f9d35632666b 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -2,7 +2,7 @@ # Makefile for x86 specific library files. # -obj-$(CONFIG_SMP) := msr-on-cpu.o +obj-$(CONFIG_SMP) := msr.o lib-y := delay.o lib-y += thunk_$(BITS).o diff --git a/arch/x86/lib/msr-on-cpu.c b/arch/x86/lib/msr-on-cpu.c deleted file mode 100644 index 321cf720dbb6..000000000000 --- a/arch/x86/lib/msr-on-cpu.c +++ /dev/null @@ -1,97 +0,0 @@ -#include <linux/module.h> -#include <linux/preempt.h> -#include <linux/smp.h> -#include <asm/msr.h> - -struct msr_info { - u32 msr_no; - u32 l, h; - int err; -}; - -static void __rdmsr_on_cpu(void *info) -{ - struct msr_info *rv = info; - - rdmsr(rv->msr_no, rv->l, rv->h); -} - -static void __wrmsr_on_cpu(void *info) -{ - struct msr_info *rv = info; - - wrmsr(rv->msr_no, rv->l, rv->h); -} - -int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) -{ - int err; - struct msr_info rv; - - rv.msr_no = msr_no; - err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1); - *l = rv.l; - *h = rv.h; - - return err; -} - -int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) -{ - int err; - struct msr_info rv; - - rv.msr_no = msr_no; - rv.l = l; - rv.h = h; - err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1); - - return err; -} - -/* These "safe" variants are slower and should be used when the target MSR - may not actually exist. */ -static void __rdmsr_safe_on_cpu(void *info) -{ - struct msr_info *rv = info; - - rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h); -} - -static void __wrmsr_safe_on_cpu(void *info) -{ - struct msr_info *rv = info; - - rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h); -} - -int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) -{ - int err; - struct msr_info rv; - - rv.msr_no = msr_no; - err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1); - *l = rv.l; - *h = rv.h; - - return err ? err : rv.err; -} - -int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) -{ - int err; - struct msr_info rv; - - rv.msr_no = msr_no; - rv.l = l; - rv.h = h; - err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1); - - return err ? err : rv.err; -} - -EXPORT_SYMBOL(rdmsr_on_cpu); -EXPORT_SYMBOL(wrmsr_on_cpu); -EXPORT_SYMBOL(rdmsr_safe_on_cpu); -EXPORT_SYMBOL(wrmsr_safe_on_cpu); diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c new file mode 100644 index 000000000000..1440b9c0547e --- /dev/null +++ b/arch/x86/lib/msr.c @@ -0,0 +1,183 @@ +#include <linux/module.h> +#include <linux/preempt.h> +#include <linux/smp.h> +#include <asm/msr.h> + +struct msr_info { + u32 msr_no; + struct msr reg; + struct msr *msrs; + int off; + int err; +}; + +static void __rdmsr_on_cpu(void *info) +{ + struct msr_info *rv = info; + struct msr *reg; + int this_cpu = raw_smp_processor_id(); + + if (rv->msrs) + reg = &rv->msrs[this_cpu - rv->off]; + else + reg = &rv->reg; + + rdmsr(rv->msr_no, reg->l, reg->h); +} + +static void __wrmsr_on_cpu(void *info) +{ + struct msr_info *rv = info; + struct msr *reg; + int this_cpu = raw_smp_processor_id(); + + if (rv->msrs) + reg = &rv->msrs[this_cpu - rv->off]; + else + reg = &rv->reg; + + wrmsr(rv->msr_no, reg->l, reg->h); +} + +int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) +{ + int err; + struct msr_info rv; + + memset(&rv, 0, sizeof(rv)); + + rv.msr_no = msr_no; + err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1); + *l = rv.reg.l; + *h = rv.reg.h; + + return err; +} +EXPORT_SYMBOL(rdmsr_on_cpu); + +int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) +{ + int err; + struct msr_info rv; + + memset(&rv, 0, sizeof(rv)); + + rv.msr_no = msr_no; + rv.reg.l = l; + rv.reg.h = h; + err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1); + + return err; +} +EXPORT_SYMBOL(wrmsr_on_cpu); + +/* rdmsr on a bunch of CPUs + * + * @mask: which CPUs + * @msr_no: which MSR + * @msrs: array of MSR values + * + */ +void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs) +{ + struct msr_info rv; + int this_cpu; + + memset(&rv, 0, sizeof(rv)); + + rv.off = cpumask_first(mask); + rv.msrs = msrs; + rv.msr_no = msr_no; + + preempt_disable(); + /* + * FIXME: handle the CPU we're executing on separately for now until + * smp_call_function_many has been fixed to not skip it. + */ + this_cpu = raw_smp_processor_id(); + smp_call_function_single(this_cpu, __rdmsr_on_cpu, &rv, 1); + + smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1); + preempt_enable(); +} +EXPORT_SYMBOL(rdmsr_on_cpus); + +/* + * wrmsr on a bunch of CPUs + * + * @mask: which CPUs + * @msr_no: which MSR + * @msrs: array of MSR values + * + */ +void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs) +{ + struct msr_info rv; + int this_cpu; + + memset(&rv, 0, sizeof(rv)); + + rv.off = cpumask_first(mask); + rv.msrs = msrs; + rv.msr_no = msr_no; + + preempt_disable(); + /* + * FIXME: handle the CPU we're executing on separately for now until + * smp_call_function_many has been fixed to not skip it. + */ + this_cpu = raw_smp_processor_id(); + smp_call_function_single(this_cpu, __wrmsr_on_cpu, &rv, 1); + + smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1); + preempt_enable(); +} +EXPORT_SYMBOL(wrmsr_on_cpus); + +/* These "safe" variants are slower and should be used when the target MSR + may not actually exist. */ +static void __rdmsr_safe_on_cpu(void *info) +{ + struct msr_info *rv = info; + + rv->err = rdmsr_safe(rv->msr_no, &rv->reg.l, &rv->reg.h); +} + +static void __wrmsr_safe_on_cpu(void *info) +{ + struct msr_info *rv = info; + + rv->err = wrmsr_safe(rv->msr_no, rv->reg.l, rv->reg.h); +} + +int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) +{ + int err; + struct msr_info rv; + + memset(&rv, 0, sizeof(rv)); + + rv.msr_no = msr_no; + err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1); + *l = rv.reg.l; + *h = rv.reg.h; + + return err ? err : rv.err; +} +EXPORT_SYMBOL(rdmsr_safe_on_cpu); + +int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) +{ + int err; + struct msr_info rv; + + memset(&rv, 0, sizeof(rv)); + + rv.msr_no = msr_no; + rv.reg.l = l; + rv.reg.h = h; + err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1); + + return err ? err : rv.err; +} +EXPORT_SYMBOL(wrmsr_safe_on_cpu); diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig index 956982f8739b..ab4f3592a11c 100644 --- a/drivers/edac/Kconfig +++ b/drivers/edac/Kconfig @@ -49,7 +49,6 @@ config EDAC_DEBUG_VERBOSE config EDAC_MM_EDAC tristate "Main Memory EDAC (Error Detection And Correction) reporting" - default y help Some systems are able to detect and correct errors in main memory. EDAC can report statistics on memory error @@ -58,6 +57,31 @@ config EDAC_MM_EDAC occurred so that a particular failing memory module can be replaced. If unsure, select 'Y'. +config EDAC_AMD64 + tristate "AMD64 (Opteron, Athlon64) K8, F10h, F11h" + depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI + help + Support for error detection and correction on the AMD 64 + Families of Memory Controllers (K8, F10h and F11h) + +config EDAC_AMD64_ERROR_INJECTION + bool "Sysfs Error Injection facilities" + depends on EDAC_AMD64 + help + Recent Opterons (Family 10h and later) provide for Memory Error + Injection into the ECC detection circuits. The amd64_edac module + allows the operator/user to inject Uncorrectable and Correctable + errors into DRAM. + + When enabled, in each of the respective memory controller directories + (/sys/devices/system/edac/mc/mcX), there are 3 input files: + + - inject_section (0..3, 16-byte section of 64-byte cacheline), + - inject_word (0..8, 16-bit word of 16-byte section), + - inject_ecc_vector (hex ecc vector: select bits of inject word) + + In addition, there are two control files, inject_read and inject_write, + which trigger the DRAM ECC Read and Write respectively. config EDAC_AMD76X tristate "AMD 76x (760, 762, 768)" diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile index 59076819135d..633dc5604ee3 100644 --- a/drivers/edac/Makefile +++ b/drivers/edac/Makefile @@ -30,6 +30,13 @@ obj-$(CONFIG_EDAC_I3000) += i3000_edac.o obj-$(CONFIG_EDAC_X38) += x38_edac.o obj-$(CONFIG_EDAC_I82860) += i82860_edac.o obj-$(CONFIG_EDAC_R82600) += r82600_edac.o + +amd64_edac_mod-y := amd64_edac_err_types.o amd64_edac.o +amd64_edac_mod-$(CONFIG_EDAC_DEBUG) += amd64_edac_dbg.o +amd64_edac_mod-$(CONFIG_EDAC_AMD64_ERROR_INJECTION) += amd64_edac_inj.o + +obj-$(CONFIG_EDAC_AMD64) += amd64_edac_mod.o + obj-$(CONFIG_EDAC_PASEMI) += pasemi_edac.o obj-$(CONFIG_EDAC_MPC85XX) += mpc85xx_edac.o obj-$(CONFIG_EDAC_MV64X60) += mv64x60_edac.o diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c new file mode 100644 index 000000000000..c36bf40568cf --- /dev/null +++ b/drivers/edac/amd64_edac.c @@ -0,0 +1,3354 @@ +#include "amd64_edac.h" +#include <asm/k8.h> + +static struct edac_pci_ctl_info *amd64_ctl_pci; + +static int report_gart_errors; +module_param(report_gart_errors, int, 0644); + +/* + * Set by command line parameter. If BIOS has enabled the ECC, this override is + * cleared to prevent re-enabling the hardware by this driver. + */ +static int ecc_enable_override; +module_param(ecc_enable_override, int, 0644); + +/* Lookup table for all possible MC control instances */ +struct amd64_pvt; +static struct mem_ctl_info *mci_lookup[MAX_NUMNODES]; +static struct amd64_pvt *pvt_lookup[MAX_NUMNODES]; + +/* + * Memory scrubber control interface. For K8, memory scrubbing is handled by + * hardware and can involve L2 cache, dcache as well as the main memory. With + * F10, this is extended to L3 cache scrubbing on CPU models sporting that + * functionality. + * + * This causes the "units" for the scrubbing speed to vary from 64 byte blocks + * (dram) over to cache lines. This is nasty, so we will use bandwidth in + * bytes/sec for the setting. + * + * Currently, we only do dram scrubbing. If the scrubbing is done in software on + * other archs, we might not have access to the caches directly. + */ + +/* + * scan the scrub rate mapping table for a close or matching bandwidth value to + * issue. If requested is too big, then use last maximum value found. + */ +static int amd64_search_set_scrub_rate(struct pci_dev *ctl, u32 new_bw, + u32 min_scrubrate) +{ + u32 scrubval; + int i; + + /* + * map the configured rate (new_bw) to a value specific to the AMD64 + * memory controller and apply to register. Search for the first + * bandwidth entry that is greater or equal than the setting requested + * and program that. If at last entry, turn off DRAM scrubbing. + */ + for (i = 0; i < ARRAY_SIZE(scrubrates); i++) { + /* + * skip scrub rates which aren't recommended + * (see F10 BKDG, F3x58) + */ + if (scrubrates[i].scrubval < min_scrubrate) + continue; + + if (scrubrates[i].bandwidth <= new_bw) + break; + + /* + * if no suitable bandwidth found, turn off DRAM scrubbing + * entirely by falling back to the last element in the + * scrubrates array. + */ + } + + scrubval = scrubrates[i].scrubval; + if (scrubval) + edac_printk(KERN_DEBUG, EDAC_MC, + "Setting scrub rate bandwidth: %u\n", + scrubrates[i].bandwidth); + else + edac_printk(KERN_DEBUG, EDAC_MC, "Turning scrubbing off.\n"); + + pci_write_bits32(ctl, K8_SCRCTRL, scrubval, 0x001F); + + return 0; +} + +static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 *bandwidth) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u32 min_scrubrate = 0x0; + + switch (boot_cpu_data.x86) { + case 0xf: + min_scrubrate = K8_MIN_SCRUB_RATE_BITS; + break; + case 0x10: + min_scrubrate = F10_MIN_SCRUB_RATE_BITS; + break; + case 0x11: + min_scrubrate = F11_MIN_SCRUB_RATE_BITS; + break; + + default: + amd64_printk(KERN_ERR, "Unsupported family!\n"); + break; + } + return amd64_search_set_scrub_rate(pvt->misc_f3_ctl, *bandwidth, + min_scrubrate); +} + +static int amd64_get_scrub_rate(struct mem_ctl_info *mci, u32 *bw) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u32 scrubval = 0; + int status = -1, i, ret = 0; + + ret = pci_read_config_dword(pvt->misc_f3_ctl, K8_SCRCTRL, &scrubval); + if (ret) + debugf0("Reading K8_SCRCTRL failed\n"); + + scrubval = scrubval & 0x001F; + + edac_printk(KERN_DEBUG, EDAC_MC, + "pci-read, sdram scrub control value: %d \n", scrubval); + + for (i = 0; ARRAY_SIZE(scrubrates); i++) { + if (scrubrates[i].scrubval == scrubval) { + *bw = scrubrates[i].bandwidth; + status = 0; + break; + } + } + + return status; +} + +/* Map from a CSROW entry to the mask entry that operates on it */ +static inline u32 amd64_map_to_dcs_mask(struct amd64_pvt *pvt, int csrow) +{ + return csrow >> (pvt->num_dcsm >> 3); +} + +/* return the 'base' address the i'th CS entry of the 'dct' DRAM controller */ +static u32 amd64_get_dct_base(struct amd64_pvt *pvt, int dct, int csrow) +{ + if (dct == 0) + return pvt->dcsb0[csrow]; + else + return pvt->dcsb1[csrow]; +} + +/* + * Return the 'mask' address the i'th CS entry. This function is needed because + * there number of DCSM registers on Rev E and prior vs Rev F and later is + * different. + */ +static u32 amd64_get_dct_mask(struct amd64_pvt *pvt, int dct, int csrow) +{ + if (dct == 0) + return pvt->dcsm0[amd64_map_to_dcs_mask(pvt, csrow)]; + else + return pvt->dcsm1[amd64_map_to_dcs_mask(pvt, csrow)]; +} + + +/* + * In *base and *limit, pass back the full 40-bit base and limit physical + * addresses for the node given by node_id. This information is obtained from + * DRAM Base (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers. The + * base and limit addresses are of type SysAddr, as defined at the start of + * section 3.4.4 (p. 70). They are the lowest and highest physical addresses + * in the address range they represent. + */ +static void amd64_get_base_and_limit(struct amd64_pvt *pvt, int node_id, + u64 *base, u64 *limit) +{ + *base = pvt->dram_base[node_id]; + *limit = pvt->dram_limit[node_id]; +} + +/* + * Return 1 if the SysAddr given by sys_addr matches the base/limit associated + * with node_id + */ +static int amd64_base_limit_match(struct amd64_pvt *pvt, + u64 sys_addr, int node_id) +{ + u64 base, limit, addr; + + amd64_get_base_and_limit(pvt, node_id, &base, &limit); + + /* The K8 treats this as a 40-bit value. However, bits 63-40 will be + * all ones if the most significant implemented address bit is 1. + * Here we discard bits 63-40. See section 3.4.2 of AMD publication + * 24592: AMD x86-64 Architecture Programmer's Manual Volume 1 + * Application Programming. + */ + addr = sys_addr & 0x000000ffffffffffull; + + return (addr >= base) && (addr <= limit); +} + +/* + * Attempt to map a SysAddr to a node. On success, return a pointer to the + * mem_ctl_info structure for the node that the SysAddr maps to. + * + * On failure, return NULL. + */ +static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci, + u64 sys_addr) +{ + struct amd64_pvt *pvt; + int node_id; + u32 intlv_en, bits; + + /* + * Here we use the DRAM Base (section 3.4.4.1) and DRAM Limit (section + * 3.4.4.2) registers to map the SysAddr to a node ID. + */ + pvt = mci->pvt_info; + + /* + * The value of this field should be the same for all DRAM Base + * registers. Therefore we arbitrarily choose to read it from the + * register for node 0. + */ + intlv_en = pvt->dram_IntlvEn[0]; + + if (intlv_en == 0) { + for (node_id = 0; ; ) { + if (amd64_base_limit_match(pvt, sys_addr, node_id)) + break; + + if (++node_id >= DRAM_REG_COUNT) + goto err_no_match; + } + goto found; + } + + if (unlikely((intlv_en != (0x01 << 8)) && + (intlv_en != (0x03 << 8)) && + (intlv_en != (0x07 << 8)))) { + amd64_printk(KERN_WARNING, "junk value of 0x%x extracted from " + "IntlvEn field of DRAM Base Register for node 0: " + "This probably indicates a BIOS bug.\n", intlv_en); + return NULL; + } + + bits = (((u32) sys_addr) >> 12) & intlv_en; + + for (node_id = 0; ; ) { + if ((pvt->dram_limit[node_id] & intlv_en) == bits) + break; /* intlv_sel field matches */ + + if (++node_id >= DRAM_REG_COUNT) + goto err_no_match; + } + + /* sanity test for sys_addr */ + if (unlikely(!amd64_base_limit_match(pvt, sys_addr, node_id))) { + amd64_printk(KERN_WARNING, + "%s(): sys_addr 0x%lx falls outside base/limit " + "address range for node %d with node interleaving " + "enabled.\n", __func__, (unsigned long)sys_addr, + node_id); + return NULL; + } + +found: + return edac_mc_find(node_id); + +err_no_match: + debugf2("sys_addr 0x%lx doesn't match any node\n", + (unsigned long)sys_addr); + + return NULL; +} + +/* + * Extract the DRAM CS base address from selected csrow register. + */ +static u64 base_from_dct_base(struct amd64_pvt *pvt, int csrow) +{ + return ((u64) (amd64_get_dct_base(pvt, 0, csrow) & pvt->dcsb_base)) << + pvt->dcs_shift; +} + +/* + * Extract the mask from the dcsb0[csrow] entry in a CPU revision-specific way. + */ +static u64 mask_from_dct_mask(struct amd64_pvt *pvt, int csrow) +{ + u64 dcsm_bits, other_bits; + u64 mask; + + /* Extract bits from DRAM CS Mask. */ + dcsm_bits = amd64_get_dct_mask(pvt, 0, csrow) & pvt->dcsm_mask; + + other_bits = pvt->dcsm_mask; + other_bits = ~(other_bits << pvt->dcs_shift); + + /* + * The extracted bits from DCSM belong in the spaces represented by + * the cleared bits in other_bits. + */ + mask = (dcsm_bits << pvt->dcs_shift) | other_bits; + + return mask; +} + +/* + * @input_addr is an InputAddr associated with the node given by mci. Return the + * csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr). + */ +static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr) +{ + struct amd64_pvt *pvt; + int csrow; + u64 base, mask; + + pvt = mci->pvt_info; + + /* + * Here we use the DRAM CS Base and DRAM CS Mask registers. For each CS + * base/mask register pair, test the condition shown near the start of + * section 3.5.4 (p. 84, BKDG #26094, K8, revA-E). + */ + for (csrow = 0; csrow < CHIPSELECT_COUNT; csrow++) { + + /* This DRAM chip select is disabled on this node */ + if ((pvt->dcsb0[csrow] & K8_DCSB_CS_ENABLE) == 0) + continue; + + base = base_from_dct_base(pvt, csrow); + mask = ~mask_from_dct_mask(pvt, csrow); + + if ((input_addr & mask) == (base & mask)) { + debugf2("InputAddr 0x%lx matches csrow %d (node %d)\n", + (unsigned long)input_addr, csrow, + pvt->mc_node_id); + + return csrow; + } + } + + debugf2("no matching csrow for InputAddr 0x%lx (MC node %d)\n", + (unsigned long)input_addr, pvt->mc_node_id); + + return -1; +} + +/* + * Return the base value defined by the DRAM Base register for the node + * represented by mci. This function returns the full 40-bit value despite the + * fact that the register only stores bits 39-24 of the value. See section + * 3.4.4.1 (BKDG #26094, K8, revA-E) + */ +static inline u64 get_dram_base(struct mem_ctl_info *mci) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return pvt->dram_base[pvt->mc_node_id]; +} + +/* + * Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094) + * for the node represented by mci. Info is passed back in *hole_base, + * *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if + * info is invalid. Info may be invalid for either of the following reasons: + * + * - The revision of the node is not E or greater. In this case, the DRAM Hole + * Address Register does not exist. + * + * - The DramHoleValid bit is cleared in the DRAM Hole Address Register, + * indicating that its contents are not valid. + * + * The values passed back in *hole_base, *hole_offset, and *hole_size are + * complete 32-bit values despite the fact that the bitfields in the DHAR + * only represent bits 31-24 of the base and offset values. + */ +int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base, + u64 *hole_offset, u64 *hole_size) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u64 base; + + /* only revE and later have the DRAM Hole Address Register */ + if (boot_cpu_data.x86 == 0xf && pvt->ext_model < OPTERON_CPU_REV_E) { + debugf1(" revision %d for node %d does not support DHAR\n", + pvt->ext_model, pvt->mc_node_id); + return 1; + } + + /* only valid for Fam10h */ + if (boot_cpu_data.x86 == 0x10 && + (pvt->dhar & F10_DRAM_MEM_HOIST_VALID) == 0) { + debugf1(" Dram Memory Hoisting is DISABLED on this system\n"); + return 1; + } + + if ((pvt->dhar & DHAR_VALID) == 0) { + debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n", + pvt->mc_node_id); + return 1; + } + + /* This node has Memory Hoisting */ + + /* +------------------+--------------------+--------------------+----- + * | memory | DRAM hole | relocated | + * | [0, (x - 1)] | [x, 0xffffffff] | addresses from | + * | | | DRAM hole | + * | | | [0x100000000, | + * | | | (0x100000000+ | + * | | | (0xffffffff-x))] | + * +------------------+--------------------+--------------------+----- + * + * Above is a diagram of physical memory showing the DRAM hole and the + * relocated addresses from the DRAM hole. As shown, the DRAM hole + * starts at address x (the base address) and extends through address + * 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the + * addresses in the hole so that they start at 0x100000000. + */ + + base = dhar_base(pvt->dhar); + + *hole_base = base; + *hole_size = (0x1ull << 32) - base; + + if (boot_cpu_data.x86 > 0xf) + *hole_offset = f10_dhar_offset(pvt->dhar); + else + *hole_offset = k8_dhar_offset(pvt->dhar); + + debugf1(" DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n", + pvt->mc_node_id, (unsigned long)*hole_base, + (unsigned long)*hole_offset, (unsigned long)*hole_size); + + return 0; +} +EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info); + +/* + * Return the DramAddr that the SysAddr given by @sys_addr maps to. It is + * assumed that sys_addr maps to the node given by mci. + * + * The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section + * 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a + * SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled, + * then it is also involved in translating a SysAddr to a DramAddr. Sections + * 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting. + * These parts of the documentation are unclear. I interpret them as follows: + * + * When node n receives a SysAddr, it processes the SysAddr as follows: + * + * 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM + * Limit registers for node n. If the SysAddr is not within the range + * specified by the base and limit values, then node n ignores the Sysaddr + * (since it does not map to node n). Otherwise continue to step 2 below. + * + * 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is + * disabled so skip to step 3 below. Otherwise see if the SysAddr is within + * the range of relocated addresses (starting at 0x100000000) from the DRAM + * hole. If not, skip to step 3 below. Else get the value of the + * DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the + * offset defined by this value from the SysAddr. + * + * 3. Obtain the base address for node n from the DRAMBase field of the DRAM + * Base register for node n. To obtain the DramAddr, subtract the base + * address from the SysAddr, as shown near the start of section 3.4.4 (p.70). + */ +static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr) +{ + u64 dram_base, hole_base, hole_offset, hole_size, dram_addr; + int ret = 0; + + dram_base = get_dram_base(mci); + + ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset, + &hole_size); + if (!ret) { + if ((sys_addr >= (1ull << 32)) && + (sys_addr < ((1ull << 32) + hole_size))) { + /* use DHAR to translate SysAddr to DramAddr */ + dram_addr = sys_addr - hole_offset; + + debugf2("using DHAR to translate SysAddr 0x%lx to " + "DramAddr 0x%lx\n", + (unsigned long)sys_addr, + (unsigned long)dram_addr); + + return dram_addr; + } + } + + /* + * Translate the SysAddr to a DramAddr as shown near the start of + * section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8 + * only deals with 40-bit values. Therefore we discard bits 63-40 of + * sys_addr below. If bit 39 of sys_addr is 1 then the bits we + * discard are all 1s. Otherwise the bits we discard are all 0s. See + * section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture + * Programmer's Manual Volume 1 Application Programming. + */ + dram_addr = (sys_addr & 0xffffffffffull) - dram_base; + + debugf2("using DRAM Base register to translate SysAddr 0x%lx to " + "DramAddr 0x%lx\n", (unsigned long)sys_addr, + (unsigned long)dram_addr); + return dram_addr; +} + +/* + * @intlv_en is the value of the IntlvEn field from a DRAM Base register + * (section 3.4.4.1). Return the number of bits from a SysAddr that are used + * for node interleaving. + */ +static int num_node_interleave_bits(unsigned intlv_en) +{ + static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 }; + int n; + + BUG_ON(intlv_en > 7); + n = intlv_shift_table[intlv_en]; + return n; +} + +/* Translate the DramAddr given by @dram_addr to an InputAddr. */ +static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr) +{ + struct amd64_pvt *pvt; + int intlv_shift; + u64 input_addr; + + pvt = mci->pvt_info; + + /* + * See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E) + * concerning translating a DramAddr to an InputAddr. + */ + intlv_shift = num_node_interleave_bits(pvt->dram_IntlvEn[0]); + input_addr = ((dram_addr >> intlv_shift) & 0xffffff000ull) + + (dram_addr & 0xfff); + + debugf2(" Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n", + intlv_shift, (unsigned long)dram_addr, + (unsigned long)input_addr); + + return input_addr; +} + +/* + * Translate the SysAddr represented by @sys_addr to an InputAddr. It is + * assumed that @sys_addr maps to the node given by mci. + */ +static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr) +{ + u64 input_addr; + + input_addr = + dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr)); + + debugf2("SysAdddr 0x%lx translates to InputAddr 0x%lx\n", + (unsigned long)sys_addr, (unsigned long)input_addr); + + return input_addr; +} + + +/* + * @input_addr is an InputAddr associated with the node represented by mci. + * Translate @input_addr to a DramAddr and return the result. + */ +static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr) +{ + struct amd64_pvt *pvt; + int node_id, intlv_shift; + u64 bits, dram_addr; + u32 intlv_sel; + + /* + * Near the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E) + * shows how to translate a DramAddr to an InputAddr. Here we reverse + * this procedure. When translating from a DramAddr to an InputAddr, the + * bits used for node interleaving are discarded. Here we recover these + * bits from the IntlvSel field of the DRAM Limit register (section + * 3.4.4.2) for the node that input_addr is associated with. + */ + pvt = mci->pvt_info; + node_id = pvt->mc_node_id; + BUG_ON((node_id < 0) || (node_id > 7)); + + intlv_shift = num_node_interleave_bits(pvt->dram_IntlvEn[0]); + + if (intlv_shift == 0) { + debugf1(" InputAddr 0x%lx translates to DramAddr of " + "same value\n", (unsigned long)input_addr); + + return input_addr; + } + + bits = ((input_addr & 0xffffff000ull) << intlv_shift) + + (input_addr & 0xfff); + + intlv_sel = pvt->dram_IntlvSel[node_id] & ((1 << intlv_shift) - 1); + dram_addr = bits + (intlv_sel << 12); + + debugf1("InputAddr 0x%lx translates to DramAddr 0x%lx " + "(%d node interleave bits)\n", (unsigned long)input_addr, + (unsigned long)dram_addr, intlv_shift); + + return dram_addr; +} + +/* + * @dram_addr is a DramAddr that maps to the node represented by mci. Convert + * @dram_addr to a SysAddr. + */ +static u64 dram_addr_to_sys_addr(struct mem_ctl_info *mci, u64 dram_addr) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u64 hole_base, hole_offset, hole_size, base, limit, sys_addr; + int ret = 0; + + ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset, + &hole_size); + if (!ret) { + if ((dram_addr >= hole_base) && + (dram_addr < (hole_base + hole_size))) { + sys_addr = dram_addr + hole_offset; + + debugf1("using DHAR to translate DramAddr 0x%lx to " + "SysAddr 0x%lx\n", (unsigned long)dram_addr, + (unsigned long)sys_addr); + + return sys_addr; + } + } + + amd64_get_base_and_limit(pvt, pvt->mc_node_id, &base, &limit); + sys_addr = dram_addr + base; + + /* + * The sys_addr we have computed up to this point is a 40-bit value + * because the k8 deals with 40-bit values. However, the value we are + * supposed to return is a full 64-bit physical address. The AMD + * x86-64 architecture specifies that the most significant implemented + * address bit through bit 63 of a physical address must be either all + * 0s or all 1s. Therefore we sign-extend the 40-bit sys_addr to a + * 64-bit value below. See section 3.4.2 of AMD publication 24592: + * AMD x86-64 Architecture Programmer's Manual Volume 1 Application + * Programming. + */ + sys_addr |= ~((sys_addr & (1ull << 39)) - 1); + + debugf1(" Node %d, DramAddr 0x%lx to SysAddr 0x%lx\n", + pvt->mc_node_id, (unsigned long)dram_addr, + (unsigned long)sys_addr); + + return sys_addr; +} + +/* + * @input_addr is an InputAddr associated with the node given by mci. Translate + * @input_addr to a SysAddr. + */ +static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci, + u64 input_addr) +{ + return dram_addr_to_sys_addr(mci, + input_addr_to_dram_addr(mci, input_addr)); +} + +/* + * Find the minimum and maximum InputAddr values that map to the given @csrow. + * Pass back these values in *input_addr_min and *input_addr_max. + */ +static void find_csrow_limits(struct mem_ctl_info *mci, int csrow, + u64 *input_addr_min, u64 *input_addr_max) +{ + struct amd64_pvt *pvt; + u64 base, mask; + + pvt = mci->pvt_info; + BUG_ON((csrow < 0) || (csrow >= CHIPSELECT_COUNT)); + + base = base_from_dct_base(pvt, csrow); + mask = mask_from_dct_mask(pvt, csrow); + + *input_addr_min = base & ~mask; + *input_addr_max = base | mask | pvt->dcs_mask_notused; +} + +/* + * Extract error address from MCA NB Address Low (section 3.6.4.5) and MCA NB + * Address High (section 3.6.4.6) register values and return the result. Address + * is located in the info structure (nbeah and nbeal), the encoding is device + * specific. + */ +static u64 extract_error_address(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return pvt->ops->get_error_address(mci, info); +} + + +/* Map the Error address to a PAGE and PAGE OFFSET. */ +static inline void error_address_to_page_and_offset(u64 error_address, + u32 *page, u32 *offset) +{ + *page = (u32) (error_address >> PAGE_SHIFT); + *offset = ((u32) error_address) & ~PAGE_MASK; +} + +/* + * @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address + * Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers + * of a node that detected an ECC memory error. mci represents the node that + * the error address maps to (possibly different from the node that detected + * the error). Return the number of the csrow that sys_addr maps to, or -1 on + * error. + */ +static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr) +{ + int csrow; + + csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr)); + + if (csrow == -1) + amd64_mc_printk(mci, KERN_ERR, + "Failed to translate InputAddr to csrow for " + "address 0x%lx\n", (unsigned long)sys_addr); + return csrow; +} + +static int get_channel_from_ecc_syndrome(unsigned short syndrome); + +static void amd64_cpu_display_info(struct amd64_pvt *pvt) +{ + if (boot_cpu_data.x86 == 0x11) + edac_printk(KERN_DEBUG, EDAC_MC, "F11h CPU detected\n"); + else if (boot_cpu_data.x86 == 0x10) + edac_printk(KERN_DEBUG, EDAC_MC, "F10h CPU detected\n"); + else if (boot_cpu_data.x86 == 0xf) + edac_printk(KERN_DEBUG, EDAC_MC, "%s detected\n", + (pvt->ext_model >= OPTERON_CPU_REV_F) ? + "Rev F or later" : "Rev E or earlier"); + else + /* we'll hardly ever ever get here */ + edac_printk(KERN_ERR, EDAC_MC, "Unknown cpu!\n"); +} + +/* + * Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs + * are ECC capable. + */ +static enum edac_type amd64_determine_edac_cap(struct amd64_pvt *pvt) +{ + int bit; + enum dev_type edac_cap = EDAC_NONE; + + bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= OPTERON_CPU_REV_F) + ? 19 + : 17; + + if (pvt->dclr0 >> BIT(bit)) + edac_cap = EDAC_FLAG_SECDED; + + return edac_cap; +} + + +static void f10_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt, + int ganged); + +/* Display and decode various NB registers for debug purposes. */ +static void amd64_dump_misc_regs(struct amd64_pvt *pvt) +{ + int ganged; + + debugf1(" nbcap:0x%8.08x DctDualCap=%s DualNode=%s 8-Node=%s\n", + pvt->nbcap, + (pvt->nbcap & K8_NBCAP_DCT_DUAL) ? "True" : "False", + (pvt->nbcap & K8_NBCAP_DUAL_NODE) ? "True" : "False", + (pvt->nbcap & K8_NBCAP_8_NODE) ? "True" : "False"); + debugf1(" ECC Capable=%s ChipKill Capable=%s\n", + (pvt->nbcap & K8_NBCAP_SECDED) ? "True" : "False", + (pvt->nbcap & K8_NBCAP_CHIPKILL) ? "True" : "False"); + debugf1(" DramCfg0-low=0x%08x DIMM-ECC=%s Parity=%s Width=%s\n", + pvt->dclr0, + (pvt->dclr0 & BIT(19)) ? "Enabled" : "Disabled", + (pvt->dclr0 & BIT(8)) ? "Enabled" : "Disabled", + (pvt->dclr0 & BIT(11)) ? "128b" : "64b"); + debugf1(" DIMM x4 Present: L0=%s L1=%s L2=%s L3=%s DIMM Type=%s\n", + (pvt->dclr0 & BIT(12)) ? "Y" : "N", + (pvt->dclr0 & BIT(13)) ? "Y" : "N", + (pvt->dclr0 & BIT(14)) ? "Y" : "N", + (pvt->dclr0 & BIT(15)) ? "Y" : "N", + (pvt->dclr0 & BIT(16)) ? "UN-Buffered" : "Buffered"); + + + debugf1(" online-spare: 0x%8.08x\n", pvt->online_spare); + + if (boot_cpu_data.x86 == 0xf) { + debugf1(" dhar: 0x%8.08x Base=0x%08x Offset=0x%08x\n", + pvt->dhar, dhar_base(pvt->dhar), + k8_dhar_offset(pvt->dhar)); + debugf1(" DramHoleValid=%s\n", + (pvt->dhar & DHAR_VALID) ? "True" : "False"); + + debugf1(" dbam-dkt: 0x%8.08x\n", pvt->dbam0); + + /* everything below this point is Fam10h and above */ + return; + + } else { + debugf1(" dhar: 0x%8.08x Base=0x%08x Offset=0x%08x\n", + pvt->dhar, dhar_base(pvt->dhar), + f10_dhar_offset(pvt->dhar)); + debugf1(" DramMemHoistValid=%s DramHoleValid=%s\n", + (pvt->dhar & F10_DRAM_MEM_HOIST_VALID) ? + "True" : "False", + (pvt->dhar & DHAR_VALID) ? + "True" : "False"); + } + + /* Only if NOT ganged does dcl1 have valid info */ + if (!dct_ganging_enabled(pvt)) { + debugf1(" DramCfg1-low=0x%08x DIMM-ECC=%s Parity=%s " + "Width=%s\n", pvt->dclr1, + (pvt->dclr1 & BIT(19)) ? "Enabled" : "Disabled", + (pvt->dclr1 & BIT(8)) ? "Enabled" : "Disabled", + (pvt->dclr1 & BIT(11)) ? "128b" : "64b"); + debugf1(" DIMM x4 Present: L0=%s L1=%s L2=%s L3=%s " + "DIMM Type=%s\n", + (pvt->dclr1 & BIT(12)) ? "Y" : "N", + (pvt->dclr1 & BIT(13)) ? "Y" : "N", + (pvt->dclr1 & BIT(14)) ? "Y" : "N", + (pvt->dclr1 & BIT(15)) ? "Y" : "N", + (pvt->dclr1 & BIT(16)) ? "UN-Buffered" : "Buffered"); + } + + /* + * Determine if ganged and then dump memory sizes for first controller, + * and if NOT ganged dump info for 2nd controller. + */ + ganged = dct_ganging_enabled(pvt); + + f10_debug_display_dimm_sizes(0, pvt, ganged); + + if (!ganged) + f10_debug_display_dimm_sizes(1, pvt, ganged); +} + +/* Read in both of DBAM registers */ +static void amd64_read_dbam_reg(struct amd64_pvt *pvt) +{ + int err = 0; + unsigned int reg; + + reg = DBAM0; + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam0); + if (err) + goto err_reg; + + if (boot_cpu_data.x86 >= 0x10) { + reg = DBAM1; + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam1); + + if (err) + goto err_reg; + } + +err_reg: + debugf0("Error reading F2x%03x.\n", reg); +} + +/* + * NOTE: CPU Revision Dependent code: Rev E and Rev F + * + * Set the DCSB and DCSM mask values depending on the CPU revision value. Also + * set the shift factor for the DCSB and DCSM values. + * + * ->dcs_mask_notused, RevE: + * + * To find the max InputAddr for the csrow, start with the base address and set + * all bits that are "don't care" bits in the test at the start of section + * 3.5.4 (p. 84). + * + * The "don't care" bits are all set bits in the mask and all bits in the gaps + * between bit ranges [35:25] and [19:13]. The value REV_E_DCS_NOTUSED_BITS + * represents bits [24:20] and [12:0], which are all bits in the above-mentioned + * gaps. + * + * ->dcs_mask_notused, RevF and later: + * + * To find the max InputAddr for the csrow, start with the base address and set + * all bits that are "don't care" bits in the test at the start of NPT section + * 4.5.4 (p. 87). + * + * The "don't care" bits are all set bits in the mask and all bits in the gaps + * between bit ranges [36:27] and [21:13]. + * + * The value REV_F_F1Xh_DCS_NOTUSED_BITS represents bits [26:22] and [12:0], + * which are all bits in the above-mentioned gaps. + */ +static void amd64_set_dct_base_and_mask(struct amd64_pvt *pvt) +{ + if (pvt->ext_model >= OPTERON_CPU_REV_F) { + pvt->dcsb_base = REV_F_F1Xh_DCSB_BASE_BITS; + pvt->dcsm_mask = REV_F_F1Xh_DCSM_MASK_BITS; + pvt->dcs_mask_notused = REV_F_F1Xh_DCS_NOTUSED_BITS; + pvt->dcs_shift = REV_F_F1Xh_DCS_SHIFT; + + switch (boot_cpu_data.x86) { + case 0xf: + pvt->num_dcsm = REV_F_DCSM_COUNT; + break; + + case 0x10: + pvt->num_dcsm = F10_DCSM_COUNT; + break; + + case 0x11: + pvt->num_dcsm = F11_DCSM_COUNT; + break; + + default: + amd64_printk(KERN_ERR, "Unsupported family!\n"); + break; + } + } else { + pvt->dcsb_base = REV_E_DCSB_BASE_BITS; + pvt->dcsm_mask = REV_E_DCSM_MASK_BITS; + pvt->dcs_mask_notused = REV_E_DCS_NOTUSED_BITS; + pvt->dcs_shift = REV_E_DCS_SHIFT; + pvt->num_dcsm = REV_E_DCSM_COUNT; + } +} + +/* + * Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask hw registers + */ +static void amd64_read_dct_base_mask(struct amd64_pvt *pvt) +{ + int cs, reg, err = 0; + + amd64_set_dct_base_and_mask(pvt); + + for (cs = 0; cs < CHIPSELECT_COUNT; cs++) { + reg = K8_DCSB0 + (cs * 4); + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, + &pvt->dcsb0[cs]); + if (unlikely(err)) + debugf0("Reading K8_DCSB0[%d] failed\n", cs); + else + debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n", + cs, pvt->dcsb0[cs], reg); + + /* If DCT are NOT ganged, then read in DCT1's base */ + if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) { + reg = F10_DCSB1 + (cs * 4); + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, + &pvt->dcsb1[cs]); + if (unlikely(err)) + debugf0("Reading F10_DCSB1[%d] failed\n", cs); + else + debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n", + cs, pvt->dcsb1[cs], reg); + } else { + pvt->dcsb1[cs] = 0; + } + } + + for (cs = 0; cs < pvt->num_dcsm; cs++) { + reg = K8_DCSB0 + (cs * 4); + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, + &pvt->dcsm0[cs]); + if (unlikely(err)) + debugf0("Reading K8_DCSM0 failed\n"); + else + debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n", + cs, pvt->dcsm0[cs], reg); + + /* If DCT are NOT ganged, then read in DCT1's mask */ + if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) { + reg = F10_DCSM1 + (cs * 4); + err = pci_read_config_dword(pvt->dram_f2_ctl, reg, + &pvt->dcsm1[cs]); + if (unlikely(err)) + debugf0("Reading F10_DCSM1[%d] failed\n", cs); + else + debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n", + cs, pvt->dcsm1[cs], reg); + } else + pvt->dcsm1[cs] = 0; + } +} + +static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt) +{ + enum mem_type type; + + if (boot_cpu_data.x86 >= 0x10 || pvt->ext_model >= OPTERON_CPU_REV_F) { + /* Rev F and later */ + type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2; + } else { + /* Rev E and earlier */ + type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR; + } + + debugf1(" Memory type is: %s\n", + (type == MEM_DDR2) ? "MEM_DDR2" : + (type == MEM_RDDR2) ? "MEM_RDDR2" : + (type == MEM_DDR) ? "MEM_DDR" : "MEM_RDDR"); + + return type; +} + +/* + * Read the DRAM Configuration Low register. It differs between CG, D & E revs + * and the later RevF memory controllers (DDR vs DDR2) + * + * Return: + * number of memory channels in operation + * Pass back: + * contents of the DCL0_LOW register + */ +static int k8_early_channel_count(struct amd64_pvt *pvt) +{ + int flag, err = 0; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); + if (err) + return err; + + if ((boot_cpu_data.x86_model >> 4) >= OPTERON_CPU_REV_F) { + /* RevF (NPT) and later */ + flag = pvt->dclr0 & F10_WIDTH_128; + } else { + /* RevE and earlier */ + flag = pvt->dclr0 & REVE_WIDTH_128; + } + + /* not used */ + pvt->dclr1 = 0; + + return (flag) ? 2 : 1; +} + +/* extract the ERROR ADDRESS for the K8 CPUs */ +static u64 k8_get_error_address(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + return (((u64) (info->nbeah & 0xff)) << 32) + + (info->nbeal & ~0x03); +} + +/* + * Read the Base and Limit registers for K8 based Memory controllers; extract + * fields from the 'raw' reg into separate data fields + * + * Isolates: BASE, LIMIT, IntlvEn, IntlvSel, RW_EN + */ +static void k8_read_dram_base_limit(struct amd64_pvt *pvt, int dram) +{ + u32 low; + u32 off = dram << 3; /* 8 bytes between DRAM entries */ + int err; + + err = pci_read_config_dword(pvt->addr_f1_ctl, + K8_DRAM_BASE_LOW + off, &low); + if (err) + debugf0("Reading K8_DRAM_BASE_LOW failed\n"); + + /* Extract parts into separate data entries */ + pvt->dram_base[dram] = ((u64) low & 0xFFFF0000) << 8; + pvt->dram_IntlvEn[dram] = (low >> 8) & 0x7; + pvt->dram_rw_en[dram] = (low & 0x3); + + err = pci_read_config_dword(pvt->addr_f1_ctl, + K8_DRAM_LIMIT_LOW + off, &low); + if (err) + debugf0("Reading K8_DRAM_LIMIT_LOW failed\n"); + + /* + * Extract parts into separate data entries. Limit is the HIGHEST memory + * location of the region, so lower 24 bits need to be all ones + */ + pvt->dram_limit[dram] = (((u64) low & 0xFFFF0000) << 8) | 0x00FFFFFF; + pvt->dram_IntlvSel[dram] = (low >> 8) & 0x7; + pvt->dram_DstNode[dram] = (low & 0x7); +} + +static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + u64 SystemAddress) +{ + struct mem_ctl_info *src_mci; + unsigned short syndrome; + int channel, csrow; + u32 page, offset; + + /* Extract the syndrome parts and form a 16-bit syndrome */ + syndrome = EXTRACT_HIGH_SYNDROME(info->nbsl) << 8; + syndrome |= EXTRACT_LOW_SYNDROME(info->nbsh); + + /* CHIPKILL enabled */ + if (info->nbcfg & K8_NBCFG_CHIPKILL) { + channel = get_channel_from_ecc_syndrome(syndrome); + if (channel < 0) { + /* + * Syndrome didn't map, so we don't know which of the + * 2 DIMMs is in error. So we need to ID 'both' of them + * as suspect. + */ + amd64_mc_printk(mci, KERN_WARNING, + "unknown syndrome 0x%x - possible error " + "reporting race\n", syndrome); + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + return; + } + } else { + /* + * non-chipkill ecc mode + * + * The k8 documentation is unclear about how to determine the + * channel number when using non-chipkill memory. This method + * was obtained from email communication with someone at AMD. + * (Wish the email was placed in this comment - norsk) + */ + channel = ((SystemAddress & BIT(3)) != 0); + } + + /* + * Find out which node the error address belongs to. This may be + * different from the node that detected the error. + */ + src_mci = find_mc_by_sys_addr(mci, SystemAddress); + if (src_mci) { + amd64_mc_printk(mci, KERN_ERR, + "failed to map error address 0x%lx to a node\n", + (unsigned long)SystemAddress); + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + return; + } + + /* Now map the SystemAddress to a CSROW */ + csrow = sys_addr_to_csrow(src_mci, SystemAddress); + if (csrow < 0) { + edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR); + } else { + error_address_to_page_and_offset(SystemAddress, &page, &offset); + + edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow, + channel, EDAC_MOD_STR); + } +} + +/* + * determrine the number of PAGES in for this DIMM's size based on its DRAM + * Address Mapping. + * + * First step is to calc the number of bits to shift a value of 1 left to + * indicate show many pages. Start with the DBAM value as the starting bits, + * then proceed to adjust those shift bits, based on CPU rev and the table. + * See BKDG on the DBAM + */ +static int k8_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map) +{ + int nr_pages; + + if (pvt->ext_model >= OPTERON_CPU_REV_F) { + nr_pages = 1 << (revf_quad_ddr2_shift[dram_map] - PAGE_SHIFT); + } else { + /* + * RevE and less section; this line is tricky. It collapses the + * table used by RevD and later to one that matches revisions CG + * and earlier. + */ + dram_map -= (pvt->ext_model >= OPTERON_CPU_REV_D) ? + (dram_map > 8 ? 4 : (dram_map > 5 ? + 3 : (dram_map > 2 ? 1 : 0))) : 0; + + /* 25 shift is 32MiB minimum DIMM size in RevE and prior */ + nr_pages = 1 << (dram_map + 25 - PAGE_SHIFT); + } + + return nr_pages; +} + +/* + * Get the number of DCT channels in use. + * + * Return: + * number of Memory Channels in operation + * Pass back: + * contents of the DCL0_LOW register + */ +static int f10_early_channel_count(struct amd64_pvt *pvt) +{ + int err = 0, channels = 0; + u32 dbam; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); + if (err) + goto err_reg; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1); + if (err) + goto err_reg; + + /* If we are in 128 bit mode, then we are using 2 channels */ + if (pvt->dclr0 & F10_WIDTH_128) { + debugf0("Data WIDTH is 128 bits - 2 channels\n"); + channels = 2; + return channels; + } + + /* + * Need to check if in UN-ganged mode: In such, there are 2 channels, + * but they are NOT in 128 bit mode and thus the above 'dcl0' status bit + * will be OFF. + * + * Need to check DCT0[0] and DCT1[0] to see if only one of them has + * their CSEnable bit on. If so, then SINGLE DIMM case. + */ + debugf0("Data WIDTH is NOT 128 bits - need more decoding\n"); + + /* + * Check DRAM Bank Address Mapping values for each DIMM to see if there + * is more than just one DIMM present in unganged mode. Need to check + * both controllers since DIMMs can be placed in either one. + */ + channels = 0; + err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM0, &dbam); + if (err) + goto err_reg; + + if (DBAM_DIMM(0, dbam) > 0) + channels++; + if (DBAM_DIMM(1, dbam) > 0) + channels++; + if (DBAM_DIMM(2, dbam) > 0) + channels++; + if (DBAM_DIMM(3, dbam) > 0) + channels++; + + /* If more than 2 DIMMs are present, then we have 2 channels */ + if (channels > 2) + channels = 2; + else if (channels == 0) { + /* No DIMMs on DCT0, so look at DCT1 */ + err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM1, &dbam); + if (err) + goto err_reg; + + if (DBAM_DIMM(0, dbam) > 0) + channels++; + if (DBAM_DIMM(1, dbam) > 0) + channels++; + if (DBAM_DIMM(2, dbam) > 0) + channels++; + if (DBAM_DIMM(3, dbam) > 0) + channels++; + + if (channels > 2) + channels = 2; + } + + /* If we found ALL 0 values, then assume just ONE DIMM-ONE Channel */ + if (channels == 0) + channels = 1; + + debugf0("DIMM count= %d\n", channels); + + return channels; + +err_reg: + return -1; + +} + +static int f10_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map) +{ + return 1 << (revf_quad_ddr2_shift[dram_map] - PAGE_SHIFT); +} + +/* Enable extended configuration access via 0xCF8 feature */ +static void amd64_setup(struct amd64_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); + + pvt->flags.cf8_extcfg = !!(reg & F10_NB_CFG_LOW_ENABLE_EXT_CFG); + reg |= F10_NB_CFG_LOW_ENABLE_EXT_CFG; + pci_write_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, reg); +} + +/* Restore the extended configuration access via 0xCF8 feature */ +static void amd64_teardown(struct amd64_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); + + reg &= ~F10_NB_CFG_LOW_ENABLE_EXT_CFG; + if (pvt->flags.cf8_extcfg) + reg |= F10_NB_CFG_LOW_ENABLE_EXT_CFG; + pci_write_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, reg); +} + +static u64 f10_get_error_address(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + return (((u64) (info->nbeah & 0xffff)) << 32) + + (info->nbeal & ~0x01); +} + +/* + * Read the Base and Limit registers for F10 based Memory controllers. Extract + * fields from the 'raw' reg into separate data fields. + * + * Isolates: BASE, LIMIT, IntlvEn, IntlvSel, RW_EN. + */ +static void f10_read_dram_base_limit(struct amd64_pvt *pvt, int dram) +{ + u32 high_offset, low_offset, high_base, low_base, high_limit, low_limit; + + low_offset = K8_DRAM_BASE_LOW + (dram << 3); + high_offset = F10_DRAM_BASE_HIGH + (dram << 3); + + /* read the 'raw' DRAM BASE Address register */ + pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_base); + + /* Read from the ECS data register */ + pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_base); + + /* Extract parts into separate data entries */ + pvt->dram_rw_en[dram] = (low_base & 0x3); + + if (pvt->dram_rw_en[dram] == 0) + return; + + pvt->dram_IntlvEn[dram] = (low_base >> 8) & 0x7; + + pvt->dram_base[dram] = (((((u64) high_base & 0x000000FF) << 32) | + ((u64) low_base & 0xFFFF0000))) << 8; + + low_offset = K8_DRAM_LIMIT_LOW + (dram << 3); + high_offset = F10_DRAM_LIMIT_HIGH + (dram << 3); + + /* read the 'raw' LIMIT registers */ + pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_limit); + + /* Read from the ECS data register for the HIGH portion */ + pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_limit); + + debugf0(" HW Regs: BASE=0x%08x-%08x LIMIT= 0x%08x-%08x\n", + high_base, low_base, high_limit, low_limit); + + pvt->dram_DstNode[dram] = (low_limit & 0x7); + pvt->dram_IntlvSel[dram] = (low_limit >> 8) & 0x7; + + /* + * Extract address values and form a LIMIT address. Limit is the HIGHEST + * memory location of the region, so low 24 bits need to be all ones. + */ + low_limit |= 0x0000FFFF; + pvt->dram_limit[dram] = + ((((u64) high_limit << 32) + (u64) low_limit) << 8) | (0xFF); +} + +static void f10_read_dram_ctl_register(struct amd64_pvt *pvt) +{ + int err = 0; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_LOW, + &pvt->dram_ctl_select_low); + if (err) { + debugf0("Reading F10_DCTL_SEL_LOW failed\n"); + } else { + debugf0("DRAM_DCTL_SEL_LOW=0x%x DctSelBaseAddr=0x%x\n", + pvt->dram_ctl_select_low, dct_sel_baseaddr(pvt)); + + debugf0(" DRAM DCTs are=%s DRAM Is=%s DRAM-Ctl-" + "sel-hi-range=%s\n", + (dct_ganging_enabled(pvt) ? "GANGED" : "NOT GANGED"), + (dct_dram_enabled(pvt) ? "Enabled" : "Disabled"), + (dct_high_range_enabled(pvt) ? "Enabled" : "Disabled")); + + debugf0(" DctDatIntLv=%s MemCleared=%s DctSelIntLvAddr=0x%x\n", + (dct_data_intlv_enabled(pvt) ? "Enabled" : "Disabled"), + (dct_memory_cleared(pvt) ? "True " : "False "), + dct_sel_interleave_addr(pvt)); + } + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_HIGH, + &pvt->dram_ctl_select_high); + if (err) + debugf0("Reading F10_DCTL_SEL_HIGH failed\n"); +} + +/* + * determine channel based on the interleaving mode: F10h BKDG, 2.8.9 Memory + * Interleaving Modes. + */ +static u32 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr, + int hi_range_sel, u32 intlv_en) +{ + u32 cs, temp, dct_sel_high = (pvt->dram_ctl_select_low >> 1) & 1; + + if (dct_ganging_enabled(pvt)) + cs = 0; + else if (hi_range_sel) + cs = dct_sel_high; + else if (dct_interleave_enabled(pvt)) { + /* + * see F2x110[DctSelIntLvAddr] - channel interleave mode + */ + if (dct_sel_interleave_addr(pvt) == 0) + cs = sys_addr >> 6 & 1; + else if ((dct_sel_interleave_addr(pvt) >> 1) & 1) { + temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) % 2; + + if (dct_sel_interleave_addr(pvt) & 1) + cs = (sys_addr >> 9 & 1) ^ temp; + else + cs = (sys_addr >> 6 & 1) ^ temp; + } else if (intlv_en & 4) + cs = sys_addr >> 15 & 1; + else if (intlv_en & 2) + cs = sys_addr >> 14 & 1; + else if (intlv_en & 1) + cs = sys_addr >> 13 & 1; + else + cs = sys_addr >> 12 & 1; + } else if (dct_high_range_enabled(pvt) && !dct_ganging_enabled(pvt)) + cs = ~dct_sel_high & 1; + else + cs = 0; + + return cs; +} + +static inline u32 f10_map_intlv_en_to_shift(u32 intlv_en) +{ + if (intlv_en == 1) + return 1; + else if (intlv_en == 3) + return 2; + else if (intlv_en == 7) + return 3; + + return 0; +} + +/* See F10h BKDG, 2.8.10.2 DctSelBaseOffset Programming */ +static inline u64 f10_get_base_addr_offset(u64 sys_addr, int hi_range_sel, + u32 dct_sel_base_addr, + u64 dct_sel_base_off, + u32 hole_valid, u32 hole_off, + u64 dram_base) +{ + u64 chan_off; + + if (hi_range_sel) { + if (!(dct_sel_base_addr & 0xFFFFF800) && + hole_valid && (sys_addr >= 0x100000000ULL)) + chan_off = hole_off << 16; + else + chan_off = dct_sel_base_off; + } else { + if (hole_valid && (sys_addr >= 0x100000000ULL)) + chan_off = hole_off << 16; + else + chan_off = dram_base & 0xFFFFF8000000ULL; + } + + return (sys_addr & 0x0000FFFFFFFFFFC0ULL) - + (chan_off & 0x0000FFFFFF800000ULL); +} + +/* Hack for the time being - Can we get this from BIOS?? */ +#define CH0SPARE_RANK 0 +#define CH1SPARE_RANK 1 + +/* + * checks if the csrow passed in is marked as SPARED, if so returns the new + * spare row + */ +static inline int f10_process_possible_spare(int csrow, + u32 cs, struct amd64_pvt *pvt) +{ + u32 swap_done; + u32 bad_dram_cs; + + /* Depending on channel, isolate respective SPARING info */ + if (cs) { + swap_done = F10_ONLINE_SPARE_SWAPDONE1(pvt->online_spare); + bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS1(pvt->online_spare); + if (swap_done && (csrow == bad_dram_cs)) + csrow = CH1SPARE_RANK; + } else { + swap_done = F10_ONLINE_SPARE_SWAPDONE0(pvt->online_spare); + bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS0(pvt->online_spare); + if (swap_done && (csrow == bad_dram_cs)) + csrow = CH0SPARE_RANK; + } + return csrow; +} + +/* + * Iterate over the DRAM DCT "base" and "mask" registers looking for a + * SystemAddr match on the specified 'ChannelSelect' and 'NodeID' + * + * Return: + * -EINVAL: NOT FOUND + * 0..csrow = Chip-Select Row + */ +static int f10_lookup_addr_in_dct(u32 in_addr, u32 nid, u32 cs) +{ + struct mem_ctl_info *mci; + struct amd64_pvt *pvt; + u32 cs_base, cs_mask; + int cs_found = -EINVAL; + int csrow; + + mci = mci_lookup[nid]; + if (!mci) + return cs_found; + + pvt = mci->pvt_info; + + debugf1("InputAddr=0x%x channelselect=%d\n", in_addr, cs); + + for (csrow = 0; csrow < CHIPSELECT_COUNT; csrow++) { + + cs_base = amd64_get_dct_base(pvt, cs, csrow); + if (!(cs_base & K8_DCSB_CS_ENABLE)) + continue; + + /* + * We have an ENABLED CSROW, Isolate just the MASK bits of the + * target: [28:19] and [13:5], which map to [36:27] and [21:13] + * of the actual address. + */ + cs_base &= REV_F_F1Xh_DCSB_BASE_BITS; + + /* + * Get the DCT Mask, and ENABLE the reserved bits: [18:16] and + * [4:0] to become ON. Then mask off bits [28:0] ([36:8]) + */ + cs_mask = amd64_get_dct_mask(pvt, cs, csrow); + + debugf1(" CSROW=%d CSBase=0x%x RAW CSMask=0x%x\n", + csrow, cs_base, cs_mask); + + cs_mask = (cs_mask | 0x0007C01F) & 0x1FFFFFFF; + + debugf1(" Final CSMask=0x%x\n", cs_mask); + debugf1(" (InputAddr & ~CSMask)=0x%x " + "(CSBase & ~CSMask)=0x%x\n", + (in_addr & ~cs_mask), (cs_base & ~cs_mask)); + + if ((in_addr & ~cs_mask) == (cs_base & ~cs_mask)) { + cs_found = f10_process_possible_spare(csrow, cs, pvt); + + debugf1(" MATCH csrow=%d\n", cs_found); + break; + } + } + return cs_found; +} + +/* For a given @dram_range, check if @sys_addr falls within it. */ +static int f10_match_to_this_node(struct amd64_pvt *pvt, int dram_range, + u64 sys_addr, int *nid, int *chan_sel) +{ + int node_id, cs_found = -EINVAL, high_range = 0; + u32 intlv_en, intlv_sel, intlv_shift, hole_off; + u32 hole_valid, tmp, dct_sel_base, channel; + u64 dram_base, chan_addr, dct_sel_base_off; + + dram_base = pvt->dram_base[dram_range]; + intlv_en = pvt->dram_IntlvEn[dram_range]; + + node_id = pvt->dram_DstNode[dram_range]; + intlv_sel = pvt->dram_IntlvSel[dram_range]; + + debugf1("(dram=%d) Base=0x%llx SystemAddr= 0x%llx Limit=0x%llx\n", + dram_range, dram_base, sys_addr, pvt->dram_limit[dram_range]); + + /* + * This assumes that one node's DHAR is the same as all the other + * nodes' DHAR. + */ + hole_off = (pvt->dhar & 0x0000FF80); + hole_valid = (pvt->dhar & 0x1); + dct_sel_base_off = (pvt->dram_ctl_select_high & 0xFFFFFC00) << 16; + + debugf1(" HoleOffset=0x%x HoleValid=0x%x IntlvSel=0x%x\n", + hole_off, hole_valid, intlv_sel); + + if (intlv_en || + (intlv_sel != ((sys_addr >> 12) & intlv_en))) + return -EINVAL; + + dct_sel_base = dct_sel_baseaddr(pvt); + + /* + * check whether addresses >= DctSelBaseAddr[47:27] are to be used to + * select between DCT0 and DCT1. + */ + if (dct_high_range_enabled(pvt) && + !dct_ganging_enabled(pvt) && + ((sys_addr >> 27) >= (dct_sel_base >> 11))) + high_range = 1; + + channel = f10_determine_channel(pvt, sys_addr, high_range, intlv_en); + + chan_addr = f10_get_base_addr_offset(sys_addr, high_range, dct_sel_base, + dct_sel_base_off, hole_valid, + hole_off, dram_base); + + intlv_shift = f10_map_intlv_en_to_shift(intlv_en); + + /* remove Node ID (in case of memory interleaving) */ + tmp = chan_addr & 0xFC0; + + chan_addr = ((chan_addr >> intlv_shift) & 0xFFFFFFFFF000ULL) | tmp; + + /* remove channel interleave and hash */ + if (dct_interleave_enabled(pvt) && + !dct_high_range_enabled(pvt) && + !dct_ganging_enabled(pvt)) { + if (dct_sel_interleave_addr(pvt) != 1) + chan_addr = (chan_addr >> 1) & 0xFFFFFFFFFFFFFFC0ULL; + else { + tmp = chan_addr & 0xFC0; + chan_addr = ((chan_addr & 0xFFFFFFFFFFFFC000ULL) >> 1) + | tmp; + } + } + + debugf1(" (ChannelAddrLong=0x%llx) >> 8 becomes InputAddr=0x%x\n", + chan_addr, (u32)(chan_addr >> 8)); + + cs_found = f10_lookup_addr_in_dct(chan_addr >> 8, node_id, channel); + + if (cs_found >= 0) { + *nid = node_id; + *chan_sel = channel; + } + return cs_found; +} + +static int f10_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr, + int *node, int *chan_sel) +{ + int dram_range, cs_found = -EINVAL; + u64 dram_base, dram_limit; + + for (dram_range = 0; dram_range < DRAM_REG_COUNT; dram_range++) { + + if (!pvt->dram_rw_en[dram_range]) + continue; + + dram_base = pvt->dram_base[dram_range]; + dram_limit = pvt->dram_limit[dram_range]; + + if ((dram_base <= sys_addr) && (sys_addr <= dram_limit)) { + + cs_found = f10_match_to_this_node(pvt, dram_range, + sys_addr, node, + chan_sel); + if (cs_found >= 0) + break; + } + } + return cs_found; +} + +/* + * This the F10h reference code from AMD to map a @sys_addr to NodeID, + * CSROW, Channel. + * + * The @sys_addr is usually an error address received from the hardware. + */ +static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + u64 sys_addr) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u32 page, offset; + unsigned short syndrome; + int nid, csrow, chan = 0; + + csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan); + + if (csrow >= 0) { + error_address_to_page_and_offset(sys_addr, &page, &offset); + + syndrome = EXTRACT_HIGH_SYNDROME(info->nbsl) << 8; + syndrome |= EXTRACT_LOW_SYNDROME(info->nbsh); + + /* + * Is CHIPKILL on? If so, then we can attempt to use the + * syndrome to isolate which channel the error was on. + */ + if (pvt->nbcfg & K8_NBCFG_CHIPKILL) + chan = get_channel_from_ecc_syndrome(syndrome); + + if (chan >= 0) { + edac_mc_handle_ce(mci, page, offset, syndrome, + csrow, chan, EDAC_MOD_STR); + } else { + /* + * Channel unknown, report all channels on this + * CSROW as failed. + */ + for (chan = 0; chan < mci->csrows[csrow].nr_channels; + chan++) { + edac_mc_handle_ce(mci, page, offset, + syndrome, + csrow, chan, + EDAC_MOD_STR); + } + } + + } else { + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + } +} + +/* + * Input (@index) is the DBAM DIMM value (1 of 4) used as an index into a shift + * table (revf_quad_ddr2_shift) which starts at 128MB DIMM size. Index of 0 + * indicates an empty DIMM slot, as reported by Hardware on empty slots. + * + * Normalize to 128MB by subracting 27 bit shift. + */ +static int map_dbam_to_csrow_size(int index) +{ + int mega_bytes = 0; + + if (index > 0 && index <= DBAM_MAX_VALUE) + mega_bytes = ((128 << (revf_quad_ddr2_shift[index]-27))); + + return mega_bytes; +} + +/* + * debug routine to display the memory sizes of a DIMM (ganged or not) and it + * CSROWs as well + */ +static void f10_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt, + int ganged) +{ + int dimm, size0, size1; + u32 dbam; + u32 *dcsb; + + debugf1(" dbam%d: 0x%8.08x CSROW is %s\n", ctrl, + ctrl ? pvt->dbam1 : pvt->dbam0, + ganged ? "GANGED - dbam1 not used" : "NON-GANGED"); + + dbam = ctrl ? pvt->dbam1 : pvt->dbam0; + dcsb = ctrl ? pvt->dcsb1 : pvt->dcsb0; + + /* Dump memory sizes for DIMM and its CSROWs */ + for (dimm = 0; dimm < 4; dimm++) { + + size0 = 0; + if (dcsb[dimm*2] & K8_DCSB_CS_ENABLE) + size0 = map_dbam_to_csrow_size(DBAM_DIMM(dimm, dbam)); + + size1 = 0; + if (dcsb[dimm*2 + 1] & K8_DCSB_CS_ENABLE) + size1 = map_dbam_to_csrow_size(DBAM_DIMM(dimm, dbam)); + + debugf1(" CTRL-%d DIMM-%d=%5dMB CSROW-%d=%5dMB " + "CSROW-%d=%5dMB\n", + ctrl, + dimm, + size0 + size1, + dimm * 2, + size0, + dimm * 2 + 1, + size1); + } +} + +/* + * Very early hardware probe on pci_probe thread to determine if this module + * supports the hardware. + * + * Return: + * 0 for OK + * 1 for error + */ +static int f10_probe_valid_hardware(struct amd64_pvt *pvt) +{ + int ret = 0; + + /* + * If we are on a DDR3 machine, we don't know yet if + * we support that properly at this time + */ + if ((pvt->dchr0 & F10_DCHR_Ddr3Mode) || + (pvt->dchr1 & F10_DCHR_Ddr3Mode)) { + + amd64_printk(KERN_WARNING, + "%s() This machine is running with DDR3 memory. " + "This is not currently supported. " + "DCHR0=0x%x DCHR1=0x%x\n", + __func__, pvt->dchr0, pvt->dchr1); + + amd64_printk(KERN_WARNING, + " Contact '%s' module MAINTAINER to help add" + " support.\n", + EDAC_MOD_STR); + + ret = 1; + + } + return ret; +} + +/* + * There currently are 3 types type of MC devices for AMD Athlon/Opterons + * (as per PCI DEVICE_IDs): + * + * Family K8: That is the Athlon64 and Opteron CPUs. They all have the same PCI + * DEVICE ID, even though there is differences between the different Revisions + * (CG,D,E,F). + * + * Family F10h and F11h. + * + */ +static struct amd64_family_type amd64_family_types[] = { + [K8_CPUS] = { + .ctl_name = "RevF", + .addr_f1_ctl = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP, + .misc_f3_ctl = PCI_DEVICE_ID_AMD_K8_NB_MISC, + .ops = { + .early_channel_count = k8_early_channel_count, + .get_error_address = k8_get_error_address, + .read_dram_base_limit = k8_read_dram_base_limit, + .map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow, + .dbam_map_to_pages = k8_dbam_map_to_pages, + } + }, + [F10_CPUS] = { + .ctl_name = "Family 10h", + .addr_f1_ctl = PCI_DEVICE_ID_AMD_10H_NB_MAP, + .misc_f3_ctl = PCI_DEVICE_ID_AMD_10H_NB_MISC, + .ops = { + .probe_valid_hardware = f10_probe_valid_hardware, + .early_channel_count = f10_early_channel_count, + .get_error_address = f10_get_error_address, + .read_dram_base_limit = f10_read_dram_base_limit, + .read_dram_ctl_register = f10_read_dram_ctl_register, + .map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow, + .dbam_map_to_pages = f10_dbam_map_to_pages, + } + }, + [F11_CPUS] = { + .ctl_name = "Family 11h", + .addr_f1_ctl = PCI_DEVICE_ID_AMD_11H_NB_MAP, + .misc_f3_ctl = PCI_DEVICE_ID_AMD_11H_NB_MISC, + .ops = { + .probe_valid_hardware = f10_probe_valid_hardware, + .early_channel_count = f10_early_channel_count, + .get_error_address = f10_get_error_address, + .read_dram_base_limit = f10_read_dram_base_limit, + .read_dram_ctl_register = f10_read_dram_ctl_register, + .map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow, + .dbam_map_to_pages = f10_dbam_map_to_pages, + } + }, +}; + +static struct pci_dev *pci_get_related_function(unsigned int vendor, + unsigned int device, + struct pci_dev *related) +{ + struct pci_dev *dev = NULL; + + dev = pci_get_device(vendor, device, dev); + while (dev) { + if ((dev->bus->number == related->bus->number) && + (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn))) + break; + dev = pci_get_device(vendor, device, dev); + } + + return dev; +} + +/* + * syndrome mapping table for ECC ChipKill devices + * + * The comment in each row is the token (nibble) number that is in error. + * The least significant nibble of the syndrome is the mask for the bits + * that are in error (need to be toggled) for the particular nibble. + * + * Each row contains 16 entries. + * The first entry (0th) is the channel number for that row of syndromes. + * The remaining 15 entries are the syndromes for the respective Error + * bit mask index. + * + * 1st index entry is 0x0001 mask, indicating that the rightmost bit is the + * bit in error. + * The 2nd index entry is 0x0010 that the second bit is damaged. + * The 3rd index entry is 0x0011 indicating that the rightmost 2 bits + * are damaged. + * Thus so on until index 15, 0x1111, whose entry has the syndrome + * indicating that all 4 bits are damaged. + * + * A search is performed on this table looking for a given syndrome. + * + * See the AMD documentation for ECC syndromes. This ECC table is valid + * across all the versions of the AMD64 processors. + * + * A fast lookup is to use the LAST four bits of the 16-bit syndrome as a + * COLUMN index, then search all ROWS of that column, looking for a match + * with the input syndrome. The ROW value will be the token number. + * + * The 0'th entry on that row, can be returned as the CHANNEL (0 or 1) of this + * error. + */ +#define NUMBER_ECC_ROWS 36 +static const unsigned short ecc_chipkill_syndromes[NUMBER_ECC_ROWS][16] = { + /* Channel 0 syndromes */ + {/*0*/ 0, 0xe821, 0x7c32, 0x9413, 0xbb44, 0x5365, 0xc776, 0x2f57, + 0xdd88, 0x35a9, 0xa1ba, 0x499b, 0x66cc, 0x8eed, 0x1afe, 0xf2df }, + {/*1*/ 0, 0x5d31, 0xa612, 0xfb23, 0x9584, 0xc8b5, 0x3396, 0x6ea7, + 0xeac8, 0xb7f9, 0x4cda, 0x11eb, 0x7f4c, 0x227d, 0xd95e, 0x846f }, + {/*2*/ 0, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, + 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f }, + {/*3*/ 0, 0x2021, 0x3032, 0x1013, 0x4044, 0x6065, 0x7076, 0x5057, + 0x8088, 0xa0a9, 0xb0ba, 0x909b, 0xc0cc, 0xe0ed, 0xf0fe, 0xd0df }, + {/*4*/ 0, 0x5041, 0xa082, 0xf0c3, 0x9054, 0xc015, 0x30d6, 0x6097, + 0xe0a8, 0xb0e9, 0x402a, 0x106b, 0x70fc, 0x20bd, 0xd07e, 0x803f }, + {/*5*/ 0, 0xbe21, 0xd732, 0x6913, 0x2144, 0x9f65, 0xf676, 0x4857, + 0x3288, 0x8ca9, 0xe5ba, 0x5b9b, 0x13cc, 0xaded, 0xc4fe, 0x7adf }, + {/*6*/ 0, 0x4951, 0x8ea2, 0xc7f3, 0x5394, 0x1ac5, 0xdd36, 0x9467, + 0xa1e8, 0xe8b9, 0x2f4a, 0x661b, 0xf27c, 0xbb2d, 0x7cde, 0x358f }, + {/*7*/ 0, 0x74e1, 0x9872, 0xec93, 0xd6b4, 0xa255, 0x4ec6, 0x3a27, + 0x6bd8, 0x1f39, 0xf3aa, 0x874b, 0xbd6c, 0xc98d, 0x251e, 0x51ff }, + {/*8*/ 0, 0x15c1, 0x2a42, 0x3f83, 0xcef4, 0xdb35, 0xe4b6, 0xf177, + 0x4758, 0x5299, 0x6d1a, 0x78db, 0x89ac, 0x9c6d, 0xa3ee, 0xb62f }, + {/*9*/ 0, 0x3d01, 0x1602, 0x2b03, 0x8504, 0xb805, 0x9306, 0xae07, + 0xca08, 0xf709, 0xdc0a, 0xe10b, 0x4f0c, 0x720d, 0x590e, 0x640f }, + {/*a*/ 0, 0x9801, 0xec02, 0x7403, 0x6b04, 0xf305, 0x8706, 0x1f07, + 0xbd08, 0x2509, 0x510a, 0xc90b, 0xd60c, 0x4e0d, 0x3a0e, 0xa20f }, + {/*b*/ 0, 0xd131, 0x6212, 0xb323, 0x3884, 0xe9b5, 0x5a96, 0x8ba7, + 0x1cc8, 0xcdf9, 0x7eda, 0xafeb, 0x244c, 0xf57d, 0x465e, 0x976f }, + {/*c*/ 0, 0xe1d1, 0x7262, 0x93b3, 0xb834, 0x59e5, 0xca56, 0x2b87, + 0xdc18, 0x3dc9, 0xae7a, 0x4fab, 0x542c, 0x85fd, 0x164e, 0xf79f }, + {/*d*/ 0, 0x6051, 0xb0a2, 0xd0f3, 0x1094, 0x70c5, 0xa036, 0xc067, + 0x20e8, 0x40b9, 0x904a, 0x601b, 0x307c, 0x502d, 0x80de, 0xe08f }, + {/*e*/ 0, 0xa4c1, 0xf842, 0x5c83, 0xe6f4, 0x4235, 0x1eb6, 0xba77, + 0x7b58, 0xdf99, 0x831a, 0x27db, 0x9dac, 0x396d, 0x65ee, 0xc12f }, + {/*f*/ 0, 0x11c1, 0x2242, 0x3383, 0xc8f4, 0xd935, 0xeab6, 0xfb77, + 0x4c58, 0x5d99, 0x6e1a, 0x7fdb, 0x84ac, 0x956d, 0xa6ee, 0xb72f }, + + /* Channel 1 syndromes */ + {/*10*/ 1, 0x45d1, 0x8a62, 0xcfb3, 0x5e34, 0x1be5, 0xd456, 0x9187, + 0xa718, 0xe2c9, 0x2d7a, 0x68ab, 0xf92c, 0xbcfd, 0x734e, 0x369f }, + {/*11*/ 1, 0x63e1, 0xb172, 0xd293, 0x14b4, 0x7755, 0xa5c6, 0xc627, + 0x28d8, 0x4b39, 0x99aa, 0xfa4b, 0x3c6c, 0x5f8d, 0x8d1e, 0xeeff }, + {/*12*/ 1, 0xb741, 0xd982, 0x6ec3, 0x2254, 0x9515, 0xfbd6, 0x4c97, + 0x33a8, 0x84e9, 0xea2a, 0x5d6b, 0x11fc, 0xa6bd, 0xc87e, 0x7f3f }, + {/*13*/ 1, 0xdd41, 0x6682, 0xbbc3, 0x3554, 0xe815, 0x53d6, 0xce97, + 0x1aa8, 0xc7e9, 0x7c2a, 0xa1fb, 0x2ffc, 0xf2bd, 0x497e, 0x943f }, + {/*14*/ 1, 0x2bd1, 0x3d62, 0x16b3, 0x4f34, 0x64e5, 0x7256, 0x5987, + 0x8518, 0xaec9, 0xb87a, 0x93ab, 0xca2c, 0xe1fd, 0xf74e, 0xdc9f }, + {/*15*/ 1, 0x83c1, 0xc142, 0x4283, 0xa4f4, 0x2735, 0x65b6, 0xe677, + 0xf858, 0x7b99, 0x391a, 0xbadb, 0x5cac, 0xdf6d, 0x9dee, 0x1e2f }, + {/*16*/ 1, 0x8fd1, 0xc562, 0x4ab3, 0xa934, 0x26e5, 0x6c56, 0xe387, + 0xfe18, 0x71c9, 0x3b7a, 0xb4ab, 0x572c, 0xd8fd, 0x924e, 0x1d9f }, + {/*17*/ 1, 0x4791, 0x89e2, 0xce73, 0x5264, 0x15f5, 0xdb86, 0x9c17, + 0xa3b8, 0xe429, 0x2a5a, 0x6dcb, 0xf1dc, 0xb64d, 0x783e, 0x3faf }, + {/*18*/ 1, 0x5781, 0xa9c2, 0xfe43, 0x92a4, 0xc525, 0x3b66, 0x6ce7, + 0xe3f8, 0xb479, 0x4a3a, 0x1dbb, 0x715c, 0x26dd, 0xd89e, 0x8f1f }, + {/*19*/ 1, 0xbf41, 0xd582, 0x6ac3, 0x2954, 0x9615, 0xfcd6, 0x4397, + 0x3ea8, 0x81e9, 0xeb2a, 0x546b, 0x17fc, 0xa8bd, 0xc27e, 0x7d3f }, + {/*1a*/ 1, 0x9891, 0xe1e2, 0x7273, 0x6464, 0xf7f5, 0x8586, 0x1617, + 0xb8b8, 0x2b29, 0x595a, 0xcacb, 0xdcdc, 0x4f4d, 0x3d3e, 0xaeaf }, + {/*1b*/ 1, 0xcce1, 0x4472, 0x8893, 0xfdb4, 0x3f55, 0xb9c6, 0x7527, + 0x56d8, 0x9a39, 0x12aa, 0xde4b, 0xab6c, 0x678d, 0xef1e, 0x23ff }, + {/*1c*/ 1, 0xa761, 0xf9b2, 0x5ed3, 0xe214, 0x4575, 0x1ba6, 0xbcc7, + 0x7328, 0xd449, 0x8a9a, 0x2dfb, 0x913c, 0x365d, 0x688e, 0xcfef }, + {/*1d*/ 1, 0xff61, 0x55b2, 0xaad3, 0x7914, 0x8675, 0x2ca6, 0xd3c7, + 0x9e28, 0x6149, 0xcb9a, 0x34fb, 0xe73c, 0x185d, 0xb28e, 0x4def }, + {/*1e*/ 1, 0x5451, 0xa8a2, 0xfcf3, 0x9694, 0xc2c5, 0x3e36, 0x6a67, + 0xebe8, 0xbfb9, 0x434a, 0x171b, 0x7d7c, 0x292d, 0xd5de, 0x818f }, + {/*1f*/ 1, 0x6fc1, 0xb542, 0xda83, 0x19f4, 0x7635, 0xacb6, 0xc377, + 0x2e58, 0x4199, 0x9b1a, 0xf4db, 0x37ac, 0x586d, 0x82ee, 0xed2f }, + + /* ECC bits are also in the set of tokens and they too can go bad + * first 2 cover channel 0, while the second 2 cover channel 1 + */ + {/*20*/ 0, 0xbe01, 0xd702, 0x6903, 0x2104, 0x9f05, 0xf606, 0x4807, + 0x3208, 0x8c09, 0xe50a, 0x5b0b, 0x130c, 0xad0d, 0xc40e, 0x7a0f }, + {/*21*/ 0, 0x4101, 0x8202, 0xc303, 0x5804, 0x1905, 0xda06, 0x9b07, + 0xac08, 0xed09, 0x2e0a, 0x6f0b, 0x640c, 0xb50d, 0x760e, 0x370f }, + {/*22*/ 1, 0xc441, 0x4882, 0x8cc3, 0xf654, 0x3215, 0xbed6, 0x7a97, + 0x5ba8, 0x9fe9, 0x132a, 0xd76b, 0xadfc, 0x69bd, 0xe57e, 0x213f }, + {/*23*/ 1, 0x7621, 0x9b32, 0xed13, 0xda44, 0xac65, 0x4176, 0x3757, + 0x6f88, 0x19a9, 0xf4ba, 0x829b, 0xb5cc, 0xc3ed, 0x2efe, 0x58df } +}; + +/* + * Given the syndrome argument, scan each of the channel tables for a syndrome + * match. Depending on which table it is found, return the channel number. + */ +static int get_channel_from_ecc_syndrome(unsigned short syndrome) +{ + int row; + int column; + + /* Determine column to scan */ + column = syndrome & 0xF; + + /* Scan all rows, looking for syndrome, or end of table */ + for (row = 0; row < NUMBER_ECC_ROWS; row++) { + if (ecc_chipkill_syndromes[row][column] == syndrome) + return ecc_chipkill_syndromes[row][0]; + } + + debugf0("syndrome(%x) not found\n", syndrome); + return -1; +} + +/* + * Check for valid error in the NB Status High register. If so, proceed to read + * NB Status Low, NB Address Low and NB Address High registers and store data + * into error structure. + * + * Returns: + * - 1: if hardware regs contains valid error info + * - 0: if no valid error is indicated + */ +static int amd64_get_error_info_regs(struct mem_ctl_info *mci, + struct amd64_error_info_regs *regs) +{ + struct amd64_pvt *pvt; + struct pci_dev *misc_f3_ctl; + int err = 0; + + pvt = mci->pvt_info; + misc_f3_ctl = pvt->misc_f3_ctl; + + err = pci_read_config_dword(misc_f3_ctl, K8_NBSH, ®s->nbsh); + if (err) + goto err_reg; + + if (!(regs->nbsh & K8_NBSH_VALID_BIT)) + return 0; + + /* valid error, read remaining error information registers */ + err = pci_read_config_dword(misc_f3_ctl, K8_NBSL, ®s->nbsl); + if (err) + goto err_reg; + + err = pci_read_config_dword(misc_f3_ctl, K8_NBEAL, ®s->nbeal); + if (err) + goto err_reg; + + err = pci_read_config_dword(misc_f3_ctl, K8_NBEAH, ®s->nbeah); + if (err) + goto err_reg; + + err = pci_read_config_dword(misc_f3_ctl, K8_NBCFG, ®s->nbcfg); + if (err) + goto err_reg; + + return 1; + +err_reg: + debugf0("Reading error info register failed\n"); + return 0; +} + +/* + * This function is called to retrieve the error data from hardware and store it + * in the info structure. + * + * Returns: + * - 1: if a valid error is found + * - 0: if no error is found + */ +static int amd64_get_error_info(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + struct amd64_pvt *pvt; + struct amd64_error_info_regs regs; + + pvt = mci->pvt_info; + + if (!amd64_get_error_info_regs(mci, info)) + return 0; + + /* + * Here's the problem with the K8's EDAC reporting: There are four + * registers which report pieces of error information. They are shared + * between CEs and UEs. Furthermore, contrary to what is stated in the + * BKDG, the overflow bit is never used! Every error always updates the + * reporting registers. + * + * Can you see the race condition? All four error reporting registers + * must be read before a new error updates them! There is no way to read + * all four registers atomically. The best than can be done is to detect + * that a race has occured and then report the error without any kind of + * precision. + * + * What is still positive is that errors are still reported and thus + * problems can still be detected - just not localized because the + * syndrome and address are spread out across registers. + * + * Grrrrr!!!!! Here's hoping that AMD fixes this in some future K8 rev. + * UEs and CEs should have separate register sets with proper overflow + * bits that are used! At very least the problem can be fixed by + * honoring the ErrValid bit in 'nbsh' and not updating registers - just + * set the overflow bit - unless the current error is CE and the new + * error is UE which would be the only situation for overwriting the + * current values. + */ + + regs = *info; + + /* Use info from the second read - most current */ + if (unlikely(!amd64_get_error_info_regs(mci, info))) + return 0; + + /* clear the error bits in hardware */ + pci_write_bits32(pvt->misc_f3_ctl, K8_NBSH, 0, K8_NBSH_VALID_BIT); + + /* Check for the possible race condition */ + if ((regs.nbsh != info->nbsh) || + (regs.nbsl != info->nbsl) || + (regs.nbeah != info->nbeah) || + (regs.nbeal != info->nbeal)) { + amd64_mc_printk(mci, KERN_WARNING, + "hardware STATUS read access race condition " + "detected!\n"); + return 0; + } + return 1; +} + +static inline void amd64_decode_gart_tlb_error(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + u32 err_code; + u32 ec_tt; /* error code transaction type (2b) */ + u32 ec_ll; /* error code cache level (2b) */ + + err_code = EXTRACT_ERROR_CODE(info->nbsl); + ec_ll = EXTRACT_LL_CODE(err_code); + ec_tt = EXTRACT_TT_CODE(err_code); + + amd64_mc_printk(mci, KERN_ERR, + "GART TLB event: transaction type(%s), " + "cache level(%s)\n", tt_msgs[ec_tt], ll_msgs[ec_ll]); +} + +static inline void amd64_decode_mem_cache_error(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + u32 err_code; + u32 ec_rrrr; /* error code memory transaction (4b) */ + u32 ec_tt; /* error code transaction type (2b) */ + u32 ec_ll; /* error code cache level (2b) */ + + err_code = EXTRACT_ERROR_CODE(info->nbsl); + ec_ll = EXTRACT_LL_CODE(err_code); + ec_tt = EXTRACT_TT_CODE(err_code); + ec_rrrr = EXTRACT_RRRR_CODE(err_code); + + amd64_mc_printk(mci, KERN_ERR, + "cache hierarchy error: memory transaction type(%s), " + "transaction type(%s), cache level(%s)\n", + rrrr_msgs[ec_rrrr], tt_msgs[ec_tt], ll_msgs[ec_ll]); +} + + +/* + * Handle any Correctable Errors (CEs) that have occurred. Check for valid ERROR + * ADDRESS and process. + */ +static void amd64_handle_ce(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u64 SystemAddress; + + /* Ensure that the Error Address is VALID */ + if ((info->nbsh & K8_NBSH_VALID_ERROR_ADDR) == 0) { + amd64_mc_printk(mci, KERN_ERR, + "HW has no ERROR_ADDRESS available\n"); + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + return; + } + + SystemAddress = extract_error_address(mci, info); + + amd64_mc_printk(mci, KERN_ERR, + "CE ERROR_ADDRESS= 0x%llx\n", SystemAddress); + + pvt->ops->map_sysaddr_to_csrow(mci, info, SystemAddress); +} + +/* Handle any Un-correctable Errors (UEs) */ +static void amd64_handle_ue(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + int csrow; + u64 SystemAddress; + u32 page, offset; + struct mem_ctl_info *log_mci, *src_mci = NULL; + + log_mci = mci; + + if ((info->nbsh & K8_NBSH_VALID_ERROR_ADDR) == 0) { + amd64_mc_printk(mci, KERN_CRIT, + "HW has no ERROR_ADDRESS available\n"); + edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR); + return; + } + + SystemAddress = extract_error_address(mci, info); + + /* + * Find out which node the error address belongs to. This may be + * different from the node that detected the error. + */ + src_mci = find_mc_by_sys_addr(mci, SystemAddress); + if (!src_mci) { + amd64_mc_printk(mci, KERN_CRIT, + "ERROR ADDRESS (0x%lx) value NOT mapped to a MC\n", + (unsigned long)SystemAddress); + edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR); + return; + } + + log_mci = src_mci; + + csrow = sys_addr_to_csrow(log_mci, SystemAddress); + if (csrow < 0) { + amd64_mc_printk(mci, KERN_CRIT, + "ERROR_ADDRESS (0x%lx) value NOT mapped to 'csrow'\n", + (unsigned long)SystemAddress); + edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR); + } else { + error_address_to_page_and_offset(SystemAddress, &page, &offset); + edac_mc_handle_ue(log_mci, page, offset, csrow, EDAC_MOD_STR); + } +} + +static void amd64_decode_bus_error(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + u32 err_code, ext_ec; + u32 ec_pp; /* error code participating processor (2p) */ + u32 ec_to; /* error code timed out (1b) */ + u32 ec_rrrr; /* error code memory transaction (4b) */ + u32 ec_ii; /* error code memory or I/O (2b) */ + u32 ec_ll; /* error code cache level (2b) */ + + ext_ec = EXTRACT_EXT_ERROR_CODE(info->nbsl); + err_code = EXTRACT_ERROR_CODE(info->nbsl); + + ec_ll = EXTRACT_LL_CODE(err_code); + ec_ii = EXTRACT_II_CODE(err_code); + ec_rrrr = EXTRACT_RRRR_CODE(err_code); + ec_to = EXTRACT_TO_CODE(err_code); + ec_pp = EXTRACT_PP_CODE(err_code); + + amd64_mc_printk(mci, KERN_ERR, + "BUS ERROR:\n" + " time-out(%s) mem or i/o(%s)\n" + " participating processor(%s)\n" + " memory transaction type(%s)\n" + " cache level(%s) Error Found by: %s\n", + to_msgs[ec_to], + ii_msgs[ec_ii], + pp_msgs[ec_pp], + rrrr_msgs[ec_rrrr], + ll_msgs[ec_ll], + (info->nbsh & K8_NBSH_ERR_SCRUBER) ? + "Scrubber" : "Normal Operation"); + + /* If this was an 'observed' error, early out */ + if (ec_pp == K8_NBSL_PP_OBS) + return; /* We aren't the node involved */ + + /* Parse out the extended error code for ECC events */ + switch (ext_ec) { + /* F10 changed to one Extended ECC error code */ + case F10_NBSL_EXT_ERR_RES: /* Reserved field */ + case F10_NBSL_EXT_ERR_ECC: /* F10 ECC ext err code */ + break; + + default: + amd64_mc_printk(mci, KERN_ERR, "NOT ECC: no special error " + "handling for this error\n"); + return; + } + + if (info->nbsh & K8_NBSH_CECC) + amd64_handle_ce(mci, info); + else if (info->nbsh & K8_NBSH_UECC) + amd64_handle_ue(mci, info); + + /* + * If main error is CE then overflow must be CE. If main error is UE + * then overflow is unknown. We'll call the overflow a CE - if + * panic_on_ue is set then we're already panic'ed and won't arrive + * here. Else, then apparently someone doesn't think that UE's are + * catastrophic. + */ + if (info->nbsh & K8_NBSH_OVERFLOW) + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR + "Error Overflow set"); +} + +int amd64_process_error_info(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + int handle_errors) +{ + struct amd64_pvt *pvt; + struct amd64_error_info_regs *regs; + u32 err_code, ext_ec; + int gart_tlb_error = 0; + + pvt = mci->pvt_info; + + /* If caller doesn't want us to process the error, return */ + if (!handle_errors) + return 1; + + regs = info; + + debugf1("NorthBridge ERROR: mci(0x%p)\n", mci); + debugf1(" MC node(%d) Error-Address(0x%.8x-%.8x)\n", + pvt->mc_node_id, regs->nbeah, regs->nbeal); + debugf1(" nbsh(0x%.8x) nbsl(0x%.8x)\n", + regs->nbsh, regs->nbsl); + debugf1(" Valid Error=%s Overflow=%s\n", + (regs->nbsh & K8_NBSH_VALID_BIT) ? "True" : "False", + (regs->nbsh & K8_NBSH_OVERFLOW) ? "True" : "False"); + debugf1(" Err Uncorrected=%s MCA Error Reporting=%s\n", + (regs->nbsh & K8_NBSH_UNCORRECTED_ERR) ? + "True" : "False", + (regs->nbsh & K8_NBSH_ERR_ENABLE) ? + "True" : "False"); + debugf1(" MiscErr Valid=%s ErrAddr Valid=%s PCC=%s\n", + (regs->nbsh & K8_NBSH_MISC_ERR_VALID) ? + "True" : "False", + (regs->nbsh & K8_NBSH_VALID_ERROR_ADDR) ? + "True" : "False", + (regs->nbsh & K8_NBSH_PCC) ? + "True" : "False"); + debugf1(" CECC=%s UECC=%s Found by Scruber=%s\n", + (regs->nbsh & K8_NBSH_CECC) ? + "True" : "False", + (regs->nbsh & K8_NBSH_UECC) ? + "True" : "False", + (regs->nbsh & K8_NBSH_ERR_SCRUBER) ? + "True" : "False"); + debugf1(" CORE0=%s CORE1=%s CORE2=%s CORE3=%s\n", + (regs->nbsh & K8_NBSH_CORE0) ? "True" : "False", + (regs->nbsh & K8_NBSH_CORE1) ? "True" : "False", + (regs->nbsh & K8_NBSH_CORE2) ? "True" : "False", + (regs->nbsh & K8_NBSH_CORE3) ? "True" : "False"); + + + err_code = EXTRACT_ERROR_CODE(regs->nbsl); + + /* Determine which error type: + * 1) GART errors - non-fatal, developmental events + * 2) MEMORY errors + * 3) BUS errors + * 4) Unknown error + */ + if (TEST_TLB_ERROR(err_code)) { + /* + * GART errors are intended to help graphics driver developers + * to detect bad GART PTEs. It is recommended by AMD to disable + * GART table walk error reporting by default[1] (currently + * being disabled in mce_cpu_quirks()) and according to the + * comment in mce_cpu_quirks(), such GART errors can be + * incorrectly triggered. We may see these errors anyway and + * unless requested by the user, they won't be reported. + * + * [1] section 13.10.1 on BIOS and Kernel Developers Guide for + * AMD NPT family 0Fh processors + */ + if (report_gart_errors == 0) + return 1; + + /* + * Only if GART error reporting is requested should we generate + * any logs. + */ + gart_tlb_error = 1; + + debugf1("GART TLB error\n"); + amd64_decode_gart_tlb_error(mci, info); + } else if (TEST_MEM_ERROR(err_code)) { + debugf1("Memory/Cache error\n"); + amd64_decode_mem_cache_error(mci, info); + } else if (TEST_BUS_ERROR(err_code)) { + debugf1("Bus (Link/DRAM) error\n"); + amd64_decode_bus_error(mci, info); + } else { + /* shouldn't reach here! */ + amd64_mc_printk(mci, KERN_WARNING, + "%s(): unknown MCE error 0x%x\n", __func__, + err_code); + } + + ext_ec = EXTRACT_EXT_ERROR_CODE(regs->nbsl); + amd64_mc_printk(mci, KERN_ERR, + "ExtErr=(0x%x) %s\n", ext_ec, ext_msgs[ext_ec]); + + if (((ext_ec >= F10_NBSL_EXT_ERR_CRC && + ext_ec <= F10_NBSL_EXT_ERR_TGT) || + (ext_ec == F10_NBSL_EXT_ERR_RMW)) && + EXTRACT_LDT_LINK(info->nbsh)) { + + amd64_mc_printk(mci, KERN_ERR, + "Error on hypertransport link: %s\n", + htlink_msgs[ + EXTRACT_LDT_LINK(info->nbsh)]); + } + + /* + * Check the UE bit of the NB status high register, if set generate some + * logs. If NOT a GART error, then process the event as a NO-INFO event. + * If it was a GART error, skip that process. + */ + if (regs->nbsh & K8_NBSH_UNCORRECTED_ERR) { + amd64_mc_printk(mci, KERN_CRIT, "uncorrected error\n"); + if (!gart_tlb_error) + edac_mc_handle_ue_no_info(mci, "UE bit is set\n"); + } + + if (regs->nbsh & K8_NBSH_PCC) + amd64_mc_printk(mci, KERN_CRIT, + "PCC (processor context corrupt) set\n"); + + return 1; +} +EXPORT_SYMBOL_GPL(amd64_process_error_info); + +/* + * The main polling 'check' function, called FROM the edac core to perform the + * error checking and if an error is encountered, error processing. + */ +static void amd64_check(struct mem_ctl_info *mci) +{ + struct amd64_error_info_regs info; + + if (amd64_get_error_info(mci, &info)) + amd64_process_error_info(mci, &info, 1); +} + +/* + * Input: + * 1) struct amd64_pvt which contains pvt->dram_f2_ctl pointer + * 2) AMD Family index value + * + * Ouput: + * Upon return of 0, the following filled in: + * + * struct pvt->addr_f1_ctl + * struct pvt->misc_f3_ctl + * + * Filled in with related device funcitions of 'dram_f2_ctl' + * These devices are "reserved" via the pci_get_device() + * + * Upon return of 1 (error status): + * + * Nothing reserved + */ +static int amd64_reserve_mc_sibling_devices(struct amd64_pvt *pvt, int mc_idx) +{ + const struct amd64_family_type *amd64_dev = &amd64_family_types[mc_idx]; + + /* Reserve the ADDRESS MAP Device */ + pvt->addr_f1_ctl = pci_get_related_function(pvt->dram_f2_ctl->vendor, + amd64_dev->addr_f1_ctl, + pvt->dram_f2_ctl); + + if (!pvt->addr_f1_ctl) { + amd64_printk(KERN_ERR, "error address map device not found: " + "vendor %x device 0x%x (broken BIOS?)\n", + PCI_VENDOR_ID_AMD, amd64_dev->addr_f1_ctl); + return 1; + } + + /* Reserve the MISC Device */ + pvt->misc_f3_ctl = pci_get_related_function(pvt->dram_f2_ctl->vendor, + amd64_dev->misc_f3_ctl, + pvt->dram_f2_ctl); + + if (!pvt->misc_f3_ctl) { + pci_dev_put(pvt->addr_f1_ctl); + pvt->addr_f1_ctl = NULL; + + amd64_printk(KERN_ERR, "error miscellaneous device not found: " + "vendor %x device 0x%x (broken BIOS?)\n", + PCI_VENDOR_ID_AMD, amd64_dev->misc_f3_ctl); + return 1; + } + + debugf1(" Addr Map device PCI Bus ID:\t%s\n", + pci_name(pvt->addr_f1_ctl)); + debugf1(" DRAM MEM-CTL PCI Bus ID:\t%s\n", + pci_name(pvt->dram_f2_ctl)); + debugf1(" Misc device PCI Bus ID:\t%s\n", + pci_name(pvt->misc_f3_ctl)); + + return 0; +} + +static void amd64_free_mc_sibling_devices(struct amd64_pvt *pvt) +{ + pci_dev_put(pvt->addr_f1_ctl); + pci_dev_put(pvt->misc_f3_ctl); +} + +/* + * Retrieve the hardware registers of the memory controller (this includes the + * 'Address Map' and 'Misc' device regs) + */ +static void amd64_read_mc_registers(struct amd64_pvt *pvt) +{ + u64 msr_val; + int dram, err = 0; + + /* + * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since + * those are Read-As-Zero + */ + rdmsrl(MSR_K8_TOP_MEM1, msr_val); + pvt->top_mem = msr_val >> 23; + debugf0(" TOP_MEM=0x%08llx\n", pvt->top_mem); + + /* check first whether TOP_MEM2 is enabled */ + rdmsrl(MSR_K8_SYSCFG, msr_val); + if (msr_val & (1U << 21)) { + rdmsrl(MSR_K8_TOP_MEM2, msr_val); + pvt->top_mem2 = msr_val >> 23; + debugf0(" TOP_MEM2=0x%08llx\n", pvt->top_mem2); + } else + debugf0(" TOP_MEM2 disabled.\n"); + + amd64_cpu_display_info(pvt); + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCAP, &pvt->nbcap); + if (err) + goto err_reg; + + if (pvt->ops->read_dram_ctl_register) + pvt->ops->read_dram_ctl_register(pvt); + + for (dram = 0; dram < DRAM_REG_COUNT; dram++) { + /* + * Call CPU specific READ function to get the DRAM Base and + * Limit values from the DCT. + */ + pvt->ops->read_dram_base_limit(pvt, dram); + + /* + * Only print out debug info on rows with both R and W Enabled. + * Normal processing, compiler should optimize this whole 'if' + * debug output block away. + */ + if (pvt->dram_rw_en[dram] != 0) { + debugf1(" DRAM_BASE[%d]: 0x%8.08x-%8.08x " + "DRAM_LIMIT: 0x%8.08x-%8.08x\n", + dram, + (u32)(pvt->dram_base[dram] >> 32), + (u32)(pvt->dram_base[dram] & 0xFFFFFFFF), + (u32)(pvt->dram_limit[dram] >> 32), + (u32)(pvt->dram_limit[dram] & 0xFFFFFFFF)); + debugf1(" IntlvEn=%s %s %s " + "IntlvSel=%d DstNode=%d\n", + pvt->dram_IntlvEn[dram] ? + "Enabled" : "Disabled", + (pvt->dram_rw_en[dram] & 0x2) ? "W" : "!W", + (pvt->dram_rw_en[dram] & 0x1) ? "R" : "!R", + pvt->dram_IntlvSel[dram], + pvt->dram_DstNode[dram]); + } + } + + amd64_read_dct_base_mask(pvt); + + err = pci_read_config_dword(pvt->addr_f1_ctl, K8_DHAR, &pvt->dhar); + if (err) + goto err_reg; + + amd64_read_dbam_reg(pvt); + + err = pci_read_config_dword(pvt->misc_f3_ctl, + F10_ONLINE_SPARE, &pvt->online_spare); + if (err) + goto err_reg; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); + if (err) + goto err_reg; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCHR_0, &pvt->dchr0); + if (err) + goto err_reg; + + if (!dct_ganging_enabled(pvt)) { + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_1, + &pvt->dclr1); + if (err) + goto err_reg; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCHR_1, + &pvt->dchr1); + if (err) + goto err_reg; + } + + amd64_dump_misc_regs(pvt); + +err_reg: + debugf0("Reading an MC register failed\n"); + +} + +/* + * NOTE: CPU Revision Dependent code + * + * Input: + * @csrow_nr ChipSelect Row Number (0..CHIPSELECT_COUNT-1) + * k8 private pointer to --> + * DRAM Bank Address mapping register + * node_id + * DCL register where dual_channel_active is + * + * The DBAM register consists of 4 sets of 4 bits each definitions: + * + * Bits: CSROWs + * 0-3 CSROWs 0 and 1 + * 4-7 CSROWs 2 and 3 + * 8-11 CSROWs 4 and 5 + * 12-15 CSROWs 6 and 7 + * + * Values range from: 0 to 15 + * The meaning of the values depends on CPU revision and dual-channel state, + * see relevant BKDG more info. + * + * The memory controller provides for total of only 8 CSROWs in its current + * architecture. Each "pair" of CSROWs normally represents just one DIMM in + * single channel or two (2) DIMMs in dual channel mode. + * + * The following code logic collapses the various tables for CSROW based on CPU + * revision. + * + * Returns: + * The number of PAGE_SIZE pages on the specified CSROW number it + * encompasses + * + */ +static u32 amd64_csrow_nr_pages(int csrow_nr, struct amd64_pvt *pvt) +{ + u32 dram_map, nr_pages; + + /* + * The math on this doesn't look right on the surface because x/2*4 can + * be simplified to x*2 but this expression makes use of the fact that + * it is integral math where 1/2=0. This intermediate value becomes the + * number of bits to shift the DBAM register to extract the proper CSROW + * field. + */ + dram_map = (pvt->dbam0 >> ((csrow_nr / 2) * 4)) & 0xF; + + nr_pages = pvt->ops->dbam_map_to_pages(pvt, dram_map); + + /* + * If dual channel then double the memory size of single channel. + * Channel count is 1 or 2 + */ + nr_pages <<= (pvt->channel_count - 1); + + debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, dram_map); + debugf0(" nr_pages= %u channel-count = %d\n", + nr_pages, pvt->channel_count); + + return nr_pages; +} + +/* + * Initialize the array of csrow attribute instances, based on the values + * from pci config hardware registers. + */ +static int amd64_init_csrows(struct mem_ctl_info *mci) +{ + struct csrow_info *csrow; + struct amd64_pvt *pvt; + u64 input_addr_min, input_addr_max, sys_addr; + int i, err = 0, empty = 1; + + pvt = mci->pvt_info; + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &pvt->nbcfg); + if (err) + debugf0("Reading K8_NBCFG failed\n"); + + debugf0("NBCFG= 0x%x CHIPKILL= %s DRAM ECC= %s\n", pvt->nbcfg, + (pvt->nbcfg & K8_NBCFG_CHIPKILL) ? "Enabled" : "Disabled", + (pvt->nbcfg & K8_NBCFG_ECC_ENABLE) ? "Enabled" : "Disabled" + ); + + for (i = 0; i < CHIPSELECT_COUNT; i++) { + csrow = &mci->csrows[i]; + + if ((pvt->dcsb0[i] & K8_DCSB_CS_ENABLE) == 0) { + debugf1("----CSROW %d EMPTY for node %d\n", i, + pvt->mc_node_id); + continue; + } + + debugf1("----CSROW %d VALID for MC node %d\n", + i, pvt->mc_node_id); + + empty = 0; + csrow->nr_pages = amd64_csrow_nr_pages(i, pvt); + find_csrow_limits(mci, i, &input_addr_min, &input_addr_max); + sys_addr = input_addr_to_sys_addr(mci, input_addr_min); + csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT); + sys_addr = input_addr_to_sys_addr(mci, input_addr_max); + csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT); + csrow->page_mask = ~mask_from_dct_mask(pvt, i); + /* 8 bytes of resolution */ + + csrow->mtype = amd64_determine_memory_type(pvt); + + debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i); + debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n", + (unsigned long)input_addr_min, + (unsigned long)input_addr_max); + debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n", + (unsigned long)sys_addr, csrow->page_mask); + debugf1(" nr_pages: %u first_page: 0x%lx " + "last_page: 0x%lx\n", + (unsigned)csrow->nr_pages, + csrow->first_page, csrow->last_page); + + /* + * determine whether CHIPKILL or JUST ECC or NO ECC is operating + */ + if (pvt->nbcfg & K8_NBCFG_ECC_ENABLE) + csrow->edac_mode = + (pvt->nbcfg & K8_NBCFG_CHIPKILL) ? + EDAC_S4ECD4ED : EDAC_SECDED; + else + csrow->edac_mode = EDAC_NONE; + } + + return empty; +} + +/* + * Only if 'ecc_enable_override' is set AND BIOS had ECC disabled, do "we" + * enable it. + */ +static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) +{ + struct amd64_pvt *pvt = mci->pvt_info; + const cpumask_t *cpumask = cpumask_of_node(pvt->mc_node_id); + int cpu, idx = 0, err = 0; + struct msr msrs[cpumask_weight(cpumask)]; + u32 value; + u32 mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn; + + if (!ecc_enable_override) + return; + + memset(msrs, 0, sizeof(msrs)); + + amd64_printk(KERN_WARNING, + "'ecc_enable_override' parameter is active, " + "Enabling AMD ECC hardware now: CAUTION\n"); + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCTL, &value); + if (err) + debugf0("Reading K8_NBCTL failed\n"); + + /* turn on UECCn and CECCEn bits */ + pvt->old_nbctl = value & mask; + pvt->nbctl_mcgctl_saved = 1; + + value |= mask; + pci_write_config_dword(pvt->misc_f3_ctl, K8_NBCTL, value); + + rdmsr_on_cpus(cpumask, K8_MSR_MCGCTL, msrs); + + for_each_cpu(cpu, cpumask) { + if (msrs[idx].l & K8_MSR_MCGCTL_NBE) + set_bit(idx, &pvt->old_mcgctl); + + msrs[idx].l |= K8_MSR_MCGCTL_NBE; + idx++; + } + wrmsr_on_cpus(cpumask, K8_MSR_MCGCTL, msrs); + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); + if (err) + debugf0("Reading K8_NBCFG failed\n"); + + debugf0("NBCFG(1)= 0x%x CHIPKILL= %s ECC_ENABLE= %s\n", value, + (value & K8_NBCFG_CHIPKILL) ? "Enabled" : "Disabled", + (value & K8_NBCFG_ECC_ENABLE) ? "Enabled" : "Disabled"); + + if (!(value & K8_NBCFG_ECC_ENABLE)) { + amd64_printk(KERN_WARNING, + "This node reports that DRAM ECC is " + "currently Disabled; ENABLING now\n"); + + /* Attempt to turn on DRAM ECC Enable */ + value |= K8_NBCFG_ECC_ENABLE; + pci_write_config_dword(pvt->misc_f3_ctl, K8_NBCFG, value); + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); + if (err) + debugf0("Reading K8_NBCFG failed\n"); + + if (!(value & K8_NBCFG_ECC_ENABLE)) { + amd64_printk(KERN_WARNING, + "Hardware rejects Enabling DRAM ECC checking\n" + "Check memory DIMM configuration\n"); + } else { + amd64_printk(KERN_DEBUG, + "Hardware accepted DRAM ECC Enable\n"); + } + } + debugf0("NBCFG(2)= 0x%x CHIPKILL= %s ECC_ENABLE= %s\n", value, + (value & K8_NBCFG_CHIPKILL) ? "Enabled" : "Disabled", + (value & K8_NBCFG_ECC_ENABLE) ? "Enabled" : "Disabled"); + + pvt->ctl_error_info.nbcfg = value; +} + +static void amd64_restore_ecc_error_reporting(struct amd64_pvt *pvt) +{ + const cpumask_t *cpumask = cpumask_of_node(pvt->mc_node_id); + int cpu, idx = 0, err = 0; + struct msr msrs[cpumask_weight(cpumask)]; + u32 value; + u32 mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn; + + if (!pvt->nbctl_mcgctl_saved) + return; + + memset(msrs, 0, sizeof(msrs)); + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCTL, &value); + if (err) + debugf0("Reading K8_NBCTL failed\n"); + value &= ~mask; + value |= pvt->old_nbctl; + + /* restore the NB Enable MCGCTL bit */ + pci_write_config_dword(pvt->misc_f3_ctl, K8_NBCTL, value); + + rdmsr_on_cpus(cpumask, K8_MSR_MCGCTL, msrs); + + for_each_cpu(cpu, cpumask) { + msrs[idx].l &= ~K8_MSR_MCGCTL_NBE; + msrs[idx].l |= + test_bit(idx, &pvt->old_mcgctl) << K8_MSR_MCGCTL_NBE; + idx++; + } + + wrmsr_on_cpus(cpumask, K8_MSR_MCGCTL, msrs); +} + +static void check_mcg_ctl(void *ret) +{ + u64 msr_val = 0; + u8 nbe; + + rdmsrl(MSR_IA32_MCG_CTL, msr_val); + nbe = msr_val & K8_MSR_MCGCTL_NBE; + + debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n", + raw_smp_processor_id(), msr_val, + (nbe ? "enabled" : "disabled")); + + if (!nbe) + *(int *)ret = 0; +} + +/* check MCG_CTL on all the cpus on this node */ +static int amd64_mcg_ctl_enabled_on_cpus(const cpumask_t *mask) +{ + int ret = 1; + preempt_disable(); + smp_call_function_many(mask, check_mcg_ctl, &ret, 1); + preempt_enable(); + + return ret; +} + +/* + * EDAC requires that the BIOS have ECC enabled before taking over the + * processing of ECC errors. This is because the BIOS can properly initialize + * the memory system completely. A command line option allows to force-enable + * hardware ECC later in amd64_enable_ecc_error_reporting(). + */ +static int amd64_check_ecc_enabled(struct amd64_pvt *pvt) +{ + u32 value; + int err = 0, ret = 0; + u8 ecc_enabled = 0; + + err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); + if (err) + debugf0("Reading K8_NBCTL failed\n"); + + ecc_enabled = !!(value & K8_NBCFG_ECC_ENABLE); + + ret = amd64_mcg_ctl_enabled_on_cpus(cpumask_of_node(pvt->mc_node_id)); + + debugf0("K8_NBCFG=0x%x, DRAM ECC is %s\n", value, + (value & K8_NBCFG_ECC_ENABLE ? "enabled" : "disabled")); + + if (!ecc_enabled || !ret) { + if (!ecc_enabled) { + amd64_printk(KERN_WARNING, "This node reports that " + "Memory ECC is currently " + "disabled.\n"); + + amd64_printk(KERN_WARNING, "bit 0x%lx in register " + "F3x%x of the MISC_CONTROL device (%s) " + "should be enabled\n", K8_NBCFG_ECC_ENABLE, + K8_NBCFG, pci_name(pvt->misc_f3_ctl)); + } + if (!ret) { + amd64_printk(KERN_WARNING, "bit 0x%016lx in MSR 0x%08x " + "of node %d should be enabled\n", + K8_MSR_MCGCTL_NBE, MSR_IA32_MCG_CTL, + pvt->mc_node_id); + } + if (!ecc_enable_override) { + amd64_printk(KERN_WARNING, "WARNING: ECC is NOT " + "currently enabled by the BIOS. Module " + "will NOT be loaded.\n" + " Either Enable ECC in the BIOS, " + "or use the 'ecc_enable_override' " + "parameter.\n" + " Might be a BIOS bug, if BIOS says " + "ECC is enabled\n" + " Use of the override can cause " + "unknown side effects.\n"); + ret = -ENODEV; + } + } else { + amd64_printk(KERN_INFO, + "ECC is enabled by BIOS, Proceeding " + "with EDAC module initialization\n"); + + /* CLEAR the override, since BIOS controlled it */ + ecc_enable_override = 0; + } + + return ret; +} + +struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) + + ARRAY_SIZE(amd64_inj_attrs) + + 1]; + +struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } }; + +static void amd64_set_mc_sysfs_attributes(struct mem_ctl_info *mci) +{ + unsigned int i = 0, j = 0; + + for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++) + sysfs_attrs[i] = amd64_dbg_attrs[i]; + + for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++) + sysfs_attrs[i] = amd64_inj_attrs[j]; + + sysfs_attrs[i] = terminator; + + mci->mc_driver_sysfs_attributes = sysfs_attrs; +} + +static void amd64_setup_mci_misc_attributes(struct mem_ctl_info *mci) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2; + mci->edac_ctl_cap = EDAC_FLAG_NONE; + mci->edac_cap = EDAC_FLAG_NONE; + + if (pvt->nbcap & K8_NBCAP_SECDED) + mci->edac_ctl_cap |= EDAC_FLAG_SECDED; + + if (pvt->nbcap & K8_NBCAP_CHIPKILL) + mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED; + + mci->edac_cap = amd64_determine_edac_cap(pvt); + mci->mod_name = EDAC_MOD_STR; + mci->mod_ver = EDAC_AMD64_VERSION; + mci->ctl_name = get_amd_family_name(pvt->mc_type_index); + mci->dev_name = pci_name(pvt->dram_f2_ctl); + mci->ctl_page_to_phys = NULL; + + /* IMPORTANT: Set the polling 'check' function in this module */ + mci->edac_check = amd64_check; + + /* memory scrubber interface */ + mci->set_sdram_scrub_rate = amd64_set_scrub_rate; + mci->get_sdram_scrub_rate = amd64_get_scrub_rate; +} + +/* + * Init stuff for this DRAM Controller device. + * + * Due to a hardware feature on Fam10h CPUs, the Enable Extended Configuration + * Space feature MUST be enabled on ALL Processors prior to actually reading + * from the ECS registers. Since the loading of the module can occur on any + * 'core', and cores don't 'see' all the other processors ECS data when the + * others are NOT enabled. Our solution is to first enable ECS access in this + * routine on all processors, gather some data in a amd64_pvt structure and + * later come back in a finish-setup function to perform that final + * initialization. See also amd64_init_2nd_stage() for that. + */ +static int amd64_probe_one_instance(struct pci_dev *dram_f2_ctl, + int mc_type_index) +{ + struct amd64_pvt *pvt = NULL; + int err = 0, ret; + + ret = -ENOMEM; + pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL); + if (!pvt) + goto err_exit; + + pvt->mc_node_id = get_mc_node_id_from_pdev(dram_f2_ctl); + + pvt->dram_f2_ctl = dram_f2_ctl; + pvt->ext_model = boot_cpu_data.x86_model >> 4; + pvt->mc_type_index = mc_type_index; + pvt->ops = family_ops(mc_type_index); + pvt->old_mcgctl = 0; + + /* + * We have the dram_f2_ctl device as an argument, now go reserve its + * sibling devices from the PCI system. + */ + ret = -ENODEV; + err = amd64_reserve_mc_sibling_devices(pvt, mc_type_index); + if (err) + goto err_free; + + ret = -EINVAL; + err = amd64_check_ecc_enabled(pvt); + if (err) + goto err_put; + + /* + * Key operation here: setup of HW prior to performing ops on it. Some + * setup is required to access ECS data. After this is performed, the + * 'teardown' function must be called upon error and normal exit paths. + */ + if (boot_cpu_data.x86 >= 0x10) + amd64_setup(pvt); + + /* + * Save the pointer to the private data for use in 2nd initialization + * stage + */ + pvt_lookup[pvt->mc_node_id] = pvt; + + return 0; + +err_put: + amd64_free_mc_sibling_devices(pvt); + +err_free: + kfree(pvt); + +err_exit: + return ret; +} + +/* + * This is the finishing stage of the init code. Needs to be performed after all + * MCs' hardware have been prepped for accessing extended config space. + */ +static int amd64_init_2nd_stage(struct amd64_pvt *pvt) +{ + int node_id = pvt->mc_node_id; + struct mem_ctl_info *mci; + int ret, err = 0; + + amd64_read_mc_registers(pvt); + + ret = -ENODEV; + if (pvt->ops->probe_valid_hardware) { + err = pvt->ops->probe_valid_hardware(pvt); + if (err) + goto err_exit; + } + + /* + * We need to determine how many memory channels there are. Then use + * that information for calculating the size of the dynamic instance + * tables in the 'mci' structure + */ + pvt->channel_count = pvt->ops->early_channel_count(pvt); + if (pvt->channel_count < 0) + goto err_exit; + + ret = -ENOMEM; + mci = edac_mc_alloc(0, CHIPSELECT_COUNT, pvt->channel_count, node_id); + if (!mci) + goto err_exit; + + mci->pvt_info = pvt; + + mci->dev = &pvt->dram_f2_ctl->dev; + amd64_setup_mci_misc_attributes(mci); + + if (amd64_init_csrows(mci)) + mci->edac_cap = EDAC_FLAG_NONE; + + amd64_enable_ecc_error_reporting(mci); + amd64_set_mc_sysfs_attributes(mci); + + ret = -ENODEV; + if (edac_mc_add_mc(mci)) { + debugf1("failed edac_mc_add_mc()\n"); + goto err_add_mc; + } + + mci_lookup[node_id] = mci; + pvt_lookup[node_id] = NULL; + return 0; + +err_add_mc: + edac_mc_free(mci); + +err_exit: + debugf0("failure to init 2nd stage: ret=%d\n", ret); + + amd64_restore_ecc_error_reporting(pvt); + + if (boot_cpu_data.x86 > 0xf) + amd64_teardown(pvt); + + amd64_free_mc_sibling_devices(pvt); + + kfree(pvt_lookup[pvt->mc_node_id]); + pvt_lookup[node_id] = NULL; + + return ret; +} + + +static int __devinit amd64_init_one_instance(struct pci_dev *pdev, + const struct pci_device_id *mc_type) +{ + int ret = 0; + + debugf0("(MC node=%d,mc_type='%s')\n", + get_mc_node_id_from_pdev(pdev), + get_amd_family_name(mc_type->driver_data)); + + ret = pci_enable_device(pdev); + if (ret < 0) + ret = -EIO; + else + ret = amd64_probe_one_instance(pdev, mc_type->driver_data); + + if (ret < 0) + debugf0("ret=%d\n", ret); + + return ret; +} + +static void __devexit amd64_remove_one_instance(struct pci_dev *pdev) +{ + struct mem_ctl_info *mci; + struct amd64_pvt *pvt; + + /* Remove from EDAC CORE tracking list */ + mci = edac_mc_del_mc(&pdev->dev); + if (!mci) + return; + + pvt = mci->pvt_info; + + amd64_restore_ecc_error_reporting(pvt); + + if (boot_cpu_data.x86 > 0xf) + amd64_teardown(pvt); + + amd64_free_mc_sibling_devices(pvt); + + kfree(pvt); + mci->pvt_info = NULL; + + mci_lookup[pvt->mc_node_id] = NULL; + + /* Free the EDAC CORE resources */ + edac_mc_free(mci); +} + +/* + * This table is part of the interface for loading drivers for PCI devices. The + * PCI core identifies what devices are on a system during boot, and then + * inquiry this table to see if this driver is for a given device found. + */ +static const struct pci_device_id amd64_pci_table[] __devinitdata = { + { + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .class = 0, + .class_mask = 0, + .driver_data = K8_CPUS + }, + { + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_10H_NB_DRAM, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .class = 0, + .class_mask = 0, + .driver_data = F10_CPUS + }, + { + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_11H_NB_DRAM, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .class = 0, + .class_mask = 0, + .driver_data = F11_CPUS + }, + {0, } +}; +MODULE_DEVICE_TABLE(pci, amd64_pci_table); + +static struct pci_driver amd64_pci_driver = { + .name = EDAC_MOD_STR, + .probe = amd64_init_one_instance, + .remove = __devexit_p(amd64_remove_one_instance), + .id_table = amd64_pci_table, +}; + +static void amd64_setup_pci_device(void) +{ + struct mem_ctl_info *mci; + struct amd64_pvt *pvt; + + if (amd64_ctl_pci) + return; + + mci = mci_lookup[0]; + if (mci) { + + pvt = mci->pvt_info; + amd64_ctl_pci = + edac_pci_create_generic_ctl(&pvt->dram_f2_ctl->dev, + EDAC_MOD_STR); + + if (!amd64_ctl_pci) { + pr_warning("%s(): Unable to create PCI control\n", + __func__); + + pr_warning("%s(): PCI error report via EDAC not set\n", + __func__); + } + } +} + +static int __init amd64_edac_init(void) +{ + int nb, err = -ENODEV; + + edac_printk(KERN_INFO, EDAC_MOD_STR, EDAC_AMD64_VERSION "\n"); + + opstate_init(); + + if (cache_k8_northbridges() < 0) + goto err_exit; + + err = pci_register_driver(&amd64_pci_driver); + if (err) + return err; + + /* + * At this point, the array 'pvt_lookup[]' contains pointers to alloc'd + * amd64_pvt structs. These will be used in the 2nd stage init function + * to finish initialization of the MC instances. + */ + for (nb = 0; nb < num_k8_northbridges; nb++) { + if (!pvt_lookup[nb]) + continue; + + err = amd64_init_2nd_stage(pvt_lookup[nb]); + if (err) + goto err_exit; + } + + amd64_setup_pci_device(); + + return 0; + +err_exit: + debugf0("'finish_setup' stage failed\n"); + pci_unregister_driver(&amd64_pci_driver); + + return err; +} + +static void __exit amd64_edac_exit(void) +{ + if (amd64_ctl_pci) + edac_pci_release_generic_ctl(amd64_ctl_pci); + + pci_unregister_driver(&amd64_pci_driver); +} + +module_init(amd64_edac_init); +module_exit(amd64_edac_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, " + "Dave Peterson, Thayne Harbaugh"); +MODULE_DESCRIPTION("MC support for AMD64 memory controllers - " + EDAC_AMD64_VERSION); + +module_param(edac_op_state, int, 0444); +MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h new file mode 100644 index 000000000000..a159957e167b --- /dev/null +++ b/drivers/edac/amd64_edac.h @@ -0,0 +1,644 @@ +/* + * AMD64 class Memory Controller kernel module + * + * Copyright (c) 2009 SoftwareBitMaker. + * Copyright (c) 2009 Advanced Micro Devices, Inc. + * + * This file may be distributed under the terms of the + * GNU General Public License. + * + * Originally Written by Thayne Harbaugh + * + * Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>: + * - K8 CPU Revision D and greater support + * + * Changes by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>: + * - Module largely rewritten, with new (and hopefully correct) + * code for dealing with node and chip select interleaving, + * various code cleanup, and bug fixes + * - Added support for memory hoisting using DRAM hole address + * register + * + * Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>: + * -K8 Rev (1207) revision support added, required Revision + * specific mini-driver code to support Rev F as well as + * prior revisions + * + * Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>: + * -Family 10h revision support added. New PCI Device IDs, + * indicating new changes. Actual registers modified + * were slight, less than the Rev E to Rev F transition + * but changing the PCI Device ID was the proper thing to + * do, as it provides for almost automactic family + * detection. The mods to Rev F required more family + * information detection. + * + * Changes/Fixes by Borislav Petkov <borislav.petkov@amd.com>: + * - misc fixes and code cleanups + * + * This module is based on the following documents + * (available from http://www.amd.com/): + * + * Title: BIOS and Kernel Developer's Guide for AMD Athlon 64 and AMD + * Opteron Processors + * AMD publication #: 26094 + *` Revision: 3.26 + * + * Title: BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh + * Processors + * AMD publication #: 32559 + * Revision: 3.00 + * Issue Date: May 2006 + * + * Title: BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h + * Processors + * AMD publication #: 31116 + * Revision: 3.00 + * Issue Date: September 07, 2007 + * + * Sections in the first 2 documents are no longer in sync with each other. + * The Family 10h BKDG was totally re-written from scratch with a new + * presentation model. + * Therefore, comments that refer to a Document section might be off. + */ + +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/slab.h> +#include <linux/mmzone.h> +#include <linux/edac.h> +#include <asm/msr.h> +#include "edac_core.h" + +#define amd64_printk(level, fmt, arg...) \ + edac_printk(level, "amd64", fmt, ##arg) + +#define amd64_mc_printk(mci, level, fmt, arg...) \ + edac_mc_chipset_printk(mci, level, "amd64", fmt, ##arg) + +/* + * Throughout the comments in this code, the following terms are used: + * + * SysAddr, DramAddr, and InputAddr + * + * These terms come directly from the amd64 documentation + * (AMD publication #26094). They are defined as follows: + * + * SysAddr: + * This is a physical address generated by a CPU core or a device + * doing DMA. If generated by a CPU core, a SysAddr is the result of + * a virtual to physical address translation by the CPU core's address + * translation mechanism (MMU). + * + * DramAddr: + * A DramAddr is derived from a SysAddr by subtracting an offset that + * depends on which node the SysAddr maps to and whether the SysAddr + * is within a range affected by memory hoisting. The DRAM Base + * (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers + * determine which node a SysAddr maps to. + * + * If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr + * is within the range of addresses specified by this register, then + * a value x from the DHAR is subtracted from the SysAddr to produce a + * DramAddr. Here, x represents the base address for the node that + * the SysAddr maps to plus an offset due to memory hoisting. See + * section 3.4.8 and the comments in amd64_get_dram_hole_info() and + * sys_addr_to_dram_addr() below for more information. + * + * If the SysAddr is not affected by the DHAR then a value y is + * subtracted from the SysAddr to produce a DramAddr. Here, y is the + * base address for the node that the SysAddr maps to. See section + * 3.4.4 and the comments in sys_addr_to_dram_addr() below for more + * information. + * + * InputAddr: + * A DramAddr is translated to an InputAddr before being passed to the + * memory controller for the node that the DramAddr is associated + * with. The memory controller then maps the InputAddr to a csrow. + * If node interleaving is not in use, then the InputAddr has the same + * value as the DramAddr. Otherwise, the InputAddr is produced by + * discarding the bits used for node interleaving from the DramAddr. + * See section 3.4.4 for more information. + * + * The memory controller for a given node uses its DRAM CS Base and + * DRAM CS Mask registers to map an InputAddr to a csrow. See + * sections 3.5.4 and 3.5.5 for more information. + */ + +#define EDAC_AMD64_VERSION " Ver: 3.2.0 " __DATE__ +#define EDAC_MOD_STR "amd64_edac" + +/* Extended Model from CPUID, for CPU Revision numbers */ +#define OPTERON_CPU_LE_REV_C 0 +#define OPTERON_CPU_REV_D 1 +#define OPTERON_CPU_REV_E 2 + +/* NPT processors have the following Extended Models */ +#define OPTERON_CPU_REV_F 4 +#define OPTERON_CPU_REV_FA 5 + +/* Hardware limit on ChipSelect rows per MC and processors per system */ +#define CHIPSELECT_COUNT 8 +#define DRAM_REG_COUNT 8 + + +/* + * PCI-defined configuration space registers + */ + + +/* + * Function 1 - Address Map + */ +#define K8_DRAM_BASE_LOW 0x40 +#define K8_DRAM_LIMIT_LOW 0x44 +#define K8_DHAR 0xf0 + +#define DHAR_VALID BIT(0) +#define F10_DRAM_MEM_HOIST_VALID BIT(1) + +#define DHAR_BASE_MASK 0xff000000 +#define dhar_base(dhar) (dhar & DHAR_BASE_MASK) + +#define K8_DHAR_OFFSET_MASK 0x0000ff00 +#define k8_dhar_offset(dhar) ((dhar & K8_DHAR_OFFSET_MASK) << 16) + +#define F10_DHAR_OFFSET_MASK 0x0000ff80 + /* NOTE: Extra mask bit vs K8 */ +#define f10_dhar_offset(dhar) ((dhar & F10_DHAR_OFFSET_MASK) << 16) + + +/* F10 High BASE/LIMIT registers */ +#define F10_DRAM_BASE_HIGH 0x140 +#define F10_DRAM_LIMIT_HIGH 0x144 + + +/* + * Function 2 - DRAM controller + */ +#define K8_DCSB0 0x40 +#define F10_DCSB1 0x140 + +#define K8_DCSB_CS_ENABLE BIT(0) +#define K8_DCSB_NPT_SPARE BIT(1) +#define K8_DCSB_NPT_TESTFAIL BIT(2) + +/* + * REV E: select [31:21] and [15:9] from DCSB and the shift amount to form + * the address + */ +#define REV_E_DCSB_BASE_BITS (0xFFE0FE00ULL) +#define REV_E_DCS_SHIFT 4 +#define REV_E_DCSM_COUNT 8 + +#define REV_F_F1Xh_DCSB_BASE_BITS (0x1FF83FE0ULL) +#define REV_F_F1Xh_DCS_SHIFT 8 + +/* + * REV F and later: selects [28:19] and [13:5] from DCSB and the shift amount + * to form the address + */ +#define REV_F_DCSB_BASE_BITS (0x1FF83FE0ULL) +#define REV_F_DCS_SHIFT 8 +#define REV_F_DCSM_COUNT 4 +#define F10_DCSM_COUNT 4 +#define F11_DCSM_COUNT 2 + +/* DRAM CS Mask Registers */ +#define K8_DCSM0 0x60 +#define F10_DCSM1 0x160 + +/* REV E: select [29:21] and [15:9] from DCSM */ +#define REV_E_DCSM_MASK_BITS 0x3FE0FE00 + +/* unused bits [24:20] and [12:0] */ +#define REV_E_DCS_NOTUSED_BITS 0x01F01FFF + +/* REV F and later: select [28:19] and [13:5] from DCSM */ +#define REV_F_F1Xh_DCSM_MASK_BITS 0x1FF83FE0 + +/* unused bits [26:22] and [12:0] */ +#define REV_F_F1Xh_DCS_NOTUSED_BITS 0x07C01FFF + +#define DBAM0 0x80 +#define DBAM1 0x180 + +/* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */ +#define DBAM_DIMM(i, reg) ((((reg) >> (4*i))) & 0xF) + +#define DBAM_MAX_VALUE 11 + + +#define F10_DCLR_0 0x90 +#define F10_DCLR_1 0x190 +#define REVE_WIDTH_128 BIT(16) +#define F10_WIDTH_128 BIT(11) + + +#define F10_DCHR_0 0x94 +#define F10_DCHR_1 0x194 + +#define F10_DCHR_FOUR_RANK_DIMM BIT(18) +#define F10_DCHR_Ddr3Mode BIT(8) +#define F10_DCHR_MblMode BIT(6) + + +#define F10_DCTL_SEL_LOW 0x110 + +#define dct_sel_baseaddr(pvt) \ + ((pvt->dram_ctl_select_low) & 0xFFFFF800) + +#define dct_sel_interleave_addr(pvt) \ + (((pvt->dram_ctl_select_low) >> 6) & 0x3) + +enum { + F10_DCTL_SEL_LOW_DctSelHiRngEn = BIT(0), + F10_DCTL_SEL_LOW_DctSelIntLvEn = BIT(2), + F10_DCTL_SEL_LOW_DctGangEn = BIT(4), + F10_DCTL_SEL_LOW_DctDatIntLv = BIT(5), + F10_DCTL_SEL_LOW_DramEnable = BIT(8), + F10_DCTL_SEL_LOW_MemCleared = BIT(10), +}; + +#define dct_high_range_enabled(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelHiRngEn) + +#define dct_interleave_enabled(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelIntLvEn) + +#define dct_ganging_enabled(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctGangEn) + +#define dct_data_intlv_enabled(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctDatIntLv) + +#define dct_dram_enabled(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DramEnable) + +#define dct_memory_cleared(pvt) \ + (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_MemCleared) + + +#define F10_DCTL_SEL_HIGH 0x114 + + +/* + * Function 3 - Misc Control + */ +#define K8_NBCTL 0x40 + +/* Correctable ECC error reporting enable */ +#define K8_NBCTL_CECCEn BIT(0) + +/* UnCorrectable ECC error reporting enable */ +#define K8_NBCTL_UECCEn BIT(1) + +#define K8_NBCFG 0x44 +#define K8_NBCFG_CHIPKILL BIT(23) +#define K8_NBCFG_ECC_ENABLE BIT(22) + +#define K8_NBSL 0x48 + + +#define EXTRACT_HIGH_SYNDROME(x) (((x) >> 24) & 0xff) +#define EXTRACT_EXT_ERROR_CODE(x) (((x) >> 16) & 0x1f) + +/* Family F10h: Normalized Extended Error Codes */ +#define F10_NBSL_EXT_ERR_RES 0x0 +#define F10_NBSL_EXT_ERR_CRC 0x1 +#define F10_NBSL_EXT_ERR_SYNC 0x2 +#define F10_NBSL_EXT_ERR_MST 0x3 +#define F10_NBSL_EXT_ERR_TGT 0x4 +#define F10_NBSL_EXT_ERR_GART 0x5 +#define F10_NBSL_EXT_ERR_RMW 0x6 +#define F10_NBSL_EXT_ERR_WDT 0x7 +#define F10_NBSL_EXT_ERR_ECC 0x8 +#define F10_NBSL_EXT_ERR_DEV 0x9 +#define F10_NBSL_EXT_ERR_LINK_DATA 0xA + +/* Next two are overloaded values */ +#define F10_NBSL_EXT_ERR_LINK_PROTO 0xB +#define F10_NBSL_EXT_ERR_L3_PROTO 0xB + +#define F10_NBSL_EXT_ERR_NB_ARRAY 0xC +#define F10_NBSL_EXT_ERR_DRAM_PARITY 0xD +#define F10_NBSL_EXT_ERR_LINK_RETRY 0xE + +/* Next two are overloaded values */ +#define F10_NBSL_EXT_ERR_GART_WALK 0xF +#define F10_NBSL_EXT_ERR_DEV_WALK 0xF + +/* 0x10 to 0x1B: Reserved */ +#define F10_NBSL_EXT_ERR_L3_DATA 0x1C +#define F10_NBSL_EXT_ERR_L3_TAG 0x1D +#define F10_NBSL_EXT_ERR_L3_LRU 0x1E + +/* K8: Normalized Extended Error Codes */ +#define K8_NBSL_EXT_ERR_ECC 0x0 +#define K8_NBSL_EXT_ERR_CRC 0x1 +#define K8_NBSL_EXT_ERR_SYNC 0x2 +#define K8_NBSL_EXT_ERR_MST 0x3 +#define K8_NBSL_EXT_ERR_TGT 0x4 +#define K8_NBSL_EXT_ERR_GART 0x5 +#define K8_NBSL_EXT_ERR_RMW 0x6 +#define K8_NBSL_EXT_ERR_WDT 0x7 +#define K8_NBSL_EXT_ERR_CHIPKILL_ECC 0x8 +#define K8_NBSL_EXT_ERR_DRAM_PARITY 0xD + +#define EXTRACT_ERROR_CODE(x) ((x) & 0xffff) +#define TEST_TLB_ERROR(x) (((x) & 0xFFF0) == 0x0010) +#define TEST_MEM_ERROR(x) (((x) & 0xFF00) == 0x0100) +#define TEST_BUS_ERROR(x) (((x) & 0xF800) == 0x0800) +#define EXTRACT_TT_CODE(x) (((x) >> 2) & 0x3) +#define EXTRACT_II_CODE(x) (((x) >> 2) & 0x3) +#define EXTRACT_LL_CODE(x) (((x) >> 0) & 0x3) +#define EXTRACT_RRRR_CODE(x) (((x) >> 4) & 0xf) +#define EXTRACT_TO_CODE(x) (((x) >> 8) & 0x1) +#define EXTRACT_PP_CODE(x) (((x) >> 9) & 0x3) + +/* + * The following are for BUS type errors AFTER values have been normalized by + * shifting right + */ +#define K8_NBSL_PP_SRC 0x0 +#define K8_NBSL_PP_RES 0x1 +#define K8_NBSL_PP_OBS 0x2 +#define K8_NBSL_PP_GENERIC 0x3 + + +#define K8_NBSH 0x4C + +#define K8_NBSH_VALID_BIT BIT(31) +#define K8_NBSH_OVERFLOW BIT(30) +#define K8_NBSH_UNCORRECTED_ERR BIT(29) +#define K8_NBSH_ERR_ENABLE BIT(28) +#define K8_NBSH_MISC_ERR_VALID BIT(27) +#define K8_NBSH_VALID_ERROR_ADDR BIT(26) +#define K8_NBSH_PCC BIT(25) +#define K8_NBSH_CECC BIT(14) +#define K8_NBSH_UECC BIT(13) +#define K8_NBSH_ERR_SCRUBER BIT(8) +#define K8_NBSH_CORE3 BIT(3) +#define K8_NBSH_CORE2 BIT(2) +#define K8_NBSH_CORE1 BIT(1) +#define K8_NBSH_CORE0 BIT(0) + +#define EXTRACT_LDT_LINK(x) (((x) >> 4) & 0x7) +#define EXTRACT_ERR_CPU_MAP(x) ((x) & 0xF) +#define EXTRACT_LOW_SYNDROME(x) (((x) >> 15) & 0xff) + + +#define K8_NBEAL 0x50 +#define K8_NBEAH 0x54 +#define K8_SCRCTRL 0x58 + +#define F10_NB_CFG_LOW 0x88 +#define F10_NB_CFG_LOW_ENABLE_EXT_CFG BIT(14) + +#define F10_NB_CFG_HIGH 0x8C + +#define F10_ONLINE_SPARE 0xB0 +#define F10_ONLINE_SPARE_SWAPDONE0(x) ((x) & BIT(1)) +#define F10_ONLINE_SPARE_SWAPDONE1(x) ((x) & BIT(3)) +#define F10_ONLINE_SPARE_BADDRAM_CS0(x) (((x) >> 4) & 0x00000007) +#define F10_ONLINE_SPARE_BADDRAM_CS1(x) (((x) >> 8) & 0x00000007) + +#define F10_NB_ARRAY_ADDR 0xB8 + +#define F10_NB_ARRAY_DRAM_ECC 0x80000000 + +/* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */ +#define SET_NB_ARRAY_ADDRESS(section) (((section) & 0x3) << 1) + +#define F10_NB_ARRAY_DATA 0xBC + +#define SET_NB_DRAM_INJECTION_WRITE(word, bits) \ + (BIT(((word) & 0xF) + 20) | \ + BIT(17) | \ + ((bits) & 0xF)) + +#define SET_NB_DRAM_INJECTION_READ(word, bits) \ + (BIT(((word) & 0xF) + 20) | \ + BIT(16) | \ + ((bits) & 0xF)) + +#define K8_NBCAP 0xE8 +#define K8_NBCAP_CORES (BIT(12)|BIT(13)) +#define K8_NBCAP_CHIPKILL BIT(4) +#define K8_NBCAP_SECDED BIT(3) +#define K8_NBCAP_8_NODE BIT(2) +#define K8_NBCAP_DUAL_NODE BIT(1) +#define K8_NBCAP_DCT_DUAL BIT(0) + +/* + * MSR Regs + */ +#define K8_MSR_MCGCTL 0x017b +#define K8_MSR_MCGCTL_NBE BIT(4) + +#define K8_MSR_MC4CTL 0x0410 +#define K8_MSR_MC4STAT 0x0411 +#define K8_MSR_MC4ADDR 0x0412 + +/* AMD sets the first MC device at device ID 0x18. */ +static inline int get_mc_node_id_from_pdev(struct pci_dev *pdev) +{ + return PCI_SLOT(pdev->devfn) - 0x18; +} + +enum amd64_chipset_families { + K8_CPUS = 0, + F10_CPUS, + F11_CPUS, +}; + +/* + * Structure to hold: + * + * 1) dynamically read status and error address HW registers + * 2) sysfs entered values + * 3) MCE values + * + * Depends on entry into the modules + */ +struct amd64_error_info_regs { + u32 nbcfg; + u32 nbsh; + u32 nbsl; + u32 nbeah; + u32 nbeal; +}; + +/* Error injection control structure */ +struct error_injection { + u32 section; + u32 word; + u32 bit_map; +}; + +struct amd64_pvt { + /* pci_device handles which we utilize */ + struct pci_dev *addr_f1_ctl; + struct pci_dev *dram_f2_ctl; + struct pci_dev *misc_f3_ctl; + + int mc_node_id; /* MC index of this MC node */ + int ext_model; /* extended model value of this node */ + + struct low_ops *ops; /* pointer to per PCI Device ID func table */ + + int channel_count; + + /* Raw registers */ + u32 dclr0; /* DRAM Configuration Low DCT0 reg */ + u32 dclr1; /* DRAM Configuration Low DCT1 reg */ + u32 dchr0; /* DRAM Configuration High DCT0 reg */ + u32 dchr1; /* DRAM Configuration High DCT1 reg */ + u32 nbcap; /* North Bridge Capabilities */ + u32 nbcfg; /* F10 North Bridge Configuration */ + u32 ext_nbcfg; /* Extended F10 North Bridge Configuration */ + u32 dhar; /* DRAM Hoist reg */ + u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */ + u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */ + + /* DRAM CS Base Address Registers F2x[1,0][5C:40] */ + u32 dcsb0[CHIPSELECT_COUNT]; + u32 dcsb1[CHIPSELECT_COUNT]; + + /* DRAM CS Mask Registers F2x[1,0][6C:60] */ + u32 dcsm0[CHIPSELECT_COUNT]; + u32 dcsm1[CHIPSELECT_COUNT]; + + /* + * Decoded parts of DRAM BASE and LIMIT Registers + * F1x[78,70,68,60,58,50,48,40] + */ + u64 dram_base[DRAM_REG_COUNT]; + u64 dram_limit[DRAM_REG_COUNT]; + u8 dram_IntlvSel[DRAM_REG_COUNT]; + u8 dram_IntlvEn[DRAM_REG_COUNT]; + u8 dram_DstNode[DRAM_REG_COUNT]; + u8 dram_rw_en[DRAM_REG_COUNT]; + + /* + * The following fields are set at (load) run time, after CPU revision + * has been determined, since the dct_base and dct_mask registers vary + * based on revision + */ + u32 dcsb_base; /* DCSB base bits */ + u32 dcsm_mask; /* DCSM mask bits */ + u32 num_dcsm; /* Number of DCSM registers */ + u32 dcs_mask_notused; /* DCSM notused mask bits */ + u32 dcs_shift; /* DCSB and DCSM shift value */ + + u64 top_mem; /* top of memory below 4GB */ + u64 top_mem2; /* top of memory above 4GB */ + + u32 dram_ctl_select_low; /* DRAM Controller Select Low Reg */ + u32 dram_ctl_select_high; /* DRAM Controller Select High Reg */ + u32 online_spare; /* On-Line spare Reg */ + + /* temp storage for when input is received from sysfs */ + struct amd64_error_info_regs ctl_error_info; + + /* place to store error injection parameters prior to issue */ + struct error_injection injection; + + /* Save old hw registers' values before we modified them */ + u32 nbctl_mcgctl_saved; /* When true, following 2 are valid */ + u32 old_nbctl; + unsigned long old_mcgctl; /* per core on this node */ + + /* MC Type Index value: socket F vs Family 10h */ + u32 mc_type_index; + + /* misc settings */ + struct flags { + unsigned long cf8_extcfg:1; + } flags; +}; + +struct scrubrate { + u32 scrubval; /* bit pattern for scrub rate */ + u32 bandwidth; /* bandwidth consumed (bytes/sec) */ +}; + +extern struct scrubrate scrubrates[23]; +extern u32 revf_quad_ddr2_shift[16]; +extern const char *tt_msgs[4]; +extern const char *ll_msgs[4]; +extern const char *rrrr_msgs[16]; +extern const char *to_msgs[2]; +extern const char *pp_msgs[4]; +extern const char *ii_msgs[4]; +extern const char *ext_msgs[32]; +extern const char *htlink_msgs[8]; + +#ifdef CONFIG_EDAC_DEBUG +#define NUM_DBG_ATTRS 9 +#else +#define NUM_DBG_ATTRS 0 +#endif + +#ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION +#define NUM_INJ_ATTRS 5 +#else +#define NUM_INJ_ATTRS 0 +#endif + +extern struct mcidev_sysfs_attribute amd64_dbg_attrs[NUM_DBG_ATTRS], + amd64_inj_attrs[NUM_INJ_ATTRS]; + +/* + * Each of the PCI Device IDs types have their own set of hardware accessor + * functions and per device encoding/decoding logic. + */ +struct low_ops { + int (*probe_valid_hardware)(struct amd64_pvt *pvt); + int (*early_channel_count)(struct amd64_pvt *pvt); + + u64 (*get_error_address)(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info); + void (*read_dram_base_limit)(struct amd64_pvt *pvt, int dram); + void (*read_dram_ctl_register)(struct amd64_pvt *pvt); + void (*map_sysaddr_to_csrow)(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + u64 SystemAddr); + int (*dbam_map_to_pages)(struct amd64_pvt *pvt, int dram_map); +}; + +struct amd64_family_type { + const char *ctl_name; + u16 addr_f1_ctl; + u16 misc_f3_ctl; + struct low_ops ops; +}; + +static struct amd64_family_type amd64_family_types[]; + +static inline const char *get_amd_family_name(int index) +{ + return amd64_family_types[index].ctl_name; +} + +static inline struct low_ops *family_ops(int index) +{ + return &amd64_family_types[index].ops; +} + +/* + * For future CPU versions, verify the following as new 'slow' rates appear and + * modify the necessary skip values for the supported CPU. + */ +#define K8_MIN_SCRUB_RATE_BITS 0x0 +#define F10_MIN_SCRUB_RATE_BITS 0x5 +#define F11_MIN_SCRUB_RATE_BITS 0x6 + +int amd64_process_error_info(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + int handle_errors); +int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base, + u64 *hole_offset, u64 *hole_size); diff --git a/drivers/edac/amd64_edac_dbg.c b/drivers/edac/amd64_edac_dbg.c new file mode 100644 index 000000000000..0a41b248a4ad --- /dev/null +++ b/drivers/edac/amd64_edac_dbg.c @@ -0,0 +1,255 @@ +#include "amd64_edac.h" + +/* + * accept a hex value and store it into the virtual error register file, field: + * nbeal and nbeah. Assume virtual error values have already been set for: NBSL, + * NBSH and NBCFG. Then proceed to map the error values to a MC, CSROW and + * CHANNEL + */ +static ssize_t amd64_nbea_store(struct mem_ctl_info *mci, const char *data, + size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long long value; + int ret = 0; + + ret = strict_strtoull(data, 16, &value); + if (ret != -EINVAL) { + debugf0("received NBEA= 0x%llx\n", value); + + /* place the value into the virtual error packet */ + pvt->ctl_error_info.nbeal = (u32) value; + value >>= 32; + pvt->ctl_error_info.nbeah = (u32) value; + + /* Process the Mapping request */ + /* TODO: Add race prevention */ + amd64_process_error_info(mci, &pvt->ctl_error_info, 1); + + return count; + } + return ret; +} + +/* display back what the last NBEA (MCA NB Address (MC4_ADDR)) was written */ +static ssize_t amd64_nbea_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u64 value; + + value = pvt->ctl_error_info.nbeah; + value <<= 32; + value |= pvt->ctl_error_info.nbeal; + + return sprintf(data, "%llx\n", value); +} + +/* store the NBSL (MCA NB Status Low (MC4_STATUS)) value user desires */ +static ssize_t amd64_nbsl_store(struct mem_ctl_info *mci, const char *data, + size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 16, &value); + if (ret != -EINVAL) { + debugf0("received NBSL= 0x%lx\n", value); + + pvt->ctl_error_info.nbsl = (u32) value; + + return count; + } + return ret; +} + +/* display back what the last NBSL value written */ +static ssize_t amd64_nbsl_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u32 value; + + value = pvt->ctl_error_info.nbsl; + + return sprintf(data, "%x\n", value); +} + +/* store the NBSH (MCA NB Status High) value user desires */ +static ssize_t amd64_nbsh_store(struct mem_ctl_info *mci, const char *data, + size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 16, &value); + if (ret != -EINVAL) { + debugf0("received NBSH= 0x%lx\n", value); + + pvt->ctl_error_info.nbsh = (u32) value; + + return count; + } + return ret; +} + +/* display back what the last NBSH value written */ +static ssize_t amd64_nbsh_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + u32 value; + + value = pvt->ctl_error_info.nbsh; + + return sprintf(data, "%x\n", value); +} + +/* accept and store the NBCFG (MCA NB Configuration) value user desires */ +static ssize_t amd64_nbcfg_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 16, &value); + if (ret != -EINVAL) { + debugf0("received NBCFG= 0x%lx\n", value); + + pvt->ctl_error_info.nbcfg = (u32) value; + + return count; + } + return ret; +} + +/* various show routines for the controls of a MCI */ +static ssize_t amd64_nbcfg_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return sprintf(data, "%x\n", pvt->ctl_error_info.nbcfg); +} + + +static ssize_t amd64_dhar_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return sprintf(data, "%x\n", pvt->dhar); +} + + +static ssize_t amd64_dbam_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return sprintf(data, "%x\n", pvt->dbam0); +} + + +static ssize_t amd64_topmem_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return sprintf(data, "%llx\n", pvt->top_mem); +} + + +static ssize_t amd64_topmem2_show(struct mem_ctl_info *mci, char *data) +{ + struct amd64_pvt *pvt = mci->pvt_info; + + return sprintf(data, "%llx\n", pvt->top_mem2); +} + +static ssize_t amd64_hole_show(struct mem_ctl_info *mci, char *data) +{ + u64 hole_base = 0; + u64 hole_offset = 0; + u64 hole_size = 0; + + amd64_get_dram_hole_info(mci, &hole_base, &hole_offset, &hole_size); + + return sprintf(data, "%llx %llx %llx\n", hole_base, hole_offset, + hole_size); +} + +/* + * update NUM_DBG_ATTRS in case you add new members + */ +struct mcidev_sysfs_attribute amd64_dbg_attrs[] = { + + { + .attr = { + .name = "nbea_ctl", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = amd64_nbea_show, + .store = amd64_nbea_store, + }, + { + .attr = { + .name = "nbsl_ctl", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = amd64_nbsl_show, + .store = amd64_nbsl_store, + }, + { + .attr = { + .name = "nbsh_ctl", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = amd64_nbsh_show, + .store = amd64_nbsh_store, + }, + { + .attr = { + .name = "nbcfg_ctl", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = amd64_nbcfg_show, + .store = amd64_nbcfg_store, + }, + { + .attr = { + .name = "dhar", + .mode = (S_IRUGO) + }, + .show = amd64_dhar_show, + .store = NULL, + }, + { + .attr = { + .name = "dbam", + .mode = (S_IRUGO) + }, + .show = amd64_dbam_show, + .store = NULL, + }, + { + .attr = { + .name = "topmem", + .mode = (S_IRUGO) + }, + .show = amd64_topmem_show, + .store = NULL, + }, + { + .attr = { + .name = "topmem2", + .mode = (S_IRUGO) + }, + .show = amd64_topmem2_show, + .store = NULL, + }, + { + .attr = { + .name = "dram_hole", + .mode = (S_IRUGO) + }, + .show = amd64_hole_show, + .store = NULL, + }, +}; diff --git a/drivers/edac/amd64_edac_err_types.c b/drivers/edac/amd64_edac_err_types.c new file mode 100644 index 000000000000..f212ff12a9d8 --- /dev/null +++ b/drivers/edac/amd64_edac_err_types.c @@ -0,0 +1,161 @@ +#include "amd64_edac.h" + +/* + * See F2x80 for K8 and F2x[1,0]80 for Fam10 and later. The table below is only + * for DDR2 DRAM mapping. + */ +u32 revf_quad_ddr2_shift[] = { + 0, /* 0000b NULL DIMM (128mb) */ + 28, /* 0001b 256mb */ + 29, /* 0010b 512mb */ + 29, /* 0011b 512mb */ + 29, /* 0100b 512mb */ + 30, /* 0101b 1gb */ + 30, /* 0110b 1gb */ + 31, /* 0111b 2gb */ + 31, /* 1000b 2gb */ + 32, /* 1001b 4gb */ + 32, /* 1010b 4gb */ + 33, /* 1011b 8gb */ + 0, /* 1100b future */ + 0, /* 1101b future */ + 0, /* 1110b future */ + 0 /* 1111b future */ +}; + +/* + * Valid scrub rates for the K8 hardware memory scrubber. We map the scrubbing + * bandwidth to a valid bit pattern. The 'set' operation finds the 'matching- + * or higher value'. + * + *FIXME: Produce a better mapping/linearisation. + */ + +struct scrubrate scrubrates[] = { + { 0x01, 1600000000UL}, + { 0x02, 800000000UL}, + { 0x03, 400000000UL}, + { 0x04, 200000000UL}, + { 0x05, 100000000UL}, + { 0x06, 50000000UL}, + { 0x07, 25000000UL}, + { 0x08, 12284069UL}, + { 0x09, 6274509UL}, + { 0x0A, 3121951UL}, + { 0x0B, 1560975UL}, + { 0x0C, 781440UL}, + { 0x0D, 390720UL}, + { 0x0E, 195300UL}, + { 0x0F, 97650UL}, + { 0x10, 48854UL}, + { 0x11, 24427UL}, + { 0x12, 12213UL}, + { 0x13, 6101UL}, + { 0x14, 3051UL}, + { 0x15, 1523UL}, + { 0x16, 761UL}, + { 0x00, 0UL}, /* scrubbing off */ +}; + +/* + * string representation for the different MCA reported error types, see F3x48 + * or MSR0000_0411. + */ +const char *tt_msgs[] = { /* transaction type */ + "instruction", + "data", + "generic", + "reserved" +}; + +const char *ll_msgs[] = { /* cache level */ + "L0", + "L1", + "L2", + "L3/generic" +}; + +const char *rrrr_msgs[] = { + "generic", + "generic read", + "generic write", + "data read", + "data write", + "inst fetch", + "prefetch", + "evict", + "snoop", + "reserved RRRR= 9", + "reserved RRRR= 10", + "reserved RRRR= 11", + "reserved RRRR= 12", + "reserved RRRR= 13", + "reserved RRRR= 14", + "reserved RRRR= 15" +}; + +const char *pp_msgs[] = { /* participating processor */ + "local node originated (SRC)", + "local node responded to request (RES)", + "local node observed as 3rd party (OBS)", + "generic" +}; + +const char *to_msgs[] = { + "no timeout", + "timed out" +}; + +const char *ii_msgs[] = { /* memory or i/o */ + "mem access", + "reserved", + "i/o access", + "generic" +}; + +/* Map the 5 bits of Extended Error code to the string table. */ +const char *ext_msgs[] = { /* extended error */ + "K8 ECC error/F10 reserved", /* 0_0000b */ + "CRC error", /* 0_0001b */ + "sync error", /* 0_0010b */ + "mst abort", /* 0_0011b */ + "tgt abort", /* 0_0100b */ + "GART error", /* 0_0101b */ + "RMW error", /* 0_0110b */ + "Wdog timer error", /* 0_0111b */ + "F10-ECC/K8-Chipkill error", /* 0_1000b */ + "DEV Error", /* 0_1001b */ + "Link Data error", /* 0_1010b */ + "Link or L3 Protocol error", /* 0_1011b */ + "NB Array error", /* 0_1100b */ + "DRAM Parity error", /* 0_1101b */ + "Link Retry/GART Table Walk/DEV Table Walk error", /* 0_1110b */ + "Res 0x0ff error", /* 0_1111b */ + "Res 0x100 error", /* 1_0000b */ + "Res 0x101 error", /* 1_0001b */ + "Res 0x102 error", /* 1_0010b */ + "Res 0x103 error", /* 1_0011b */ + "Res 0x104 error", /* 1_0100b */ + "Res 0x105 error", /* 1_0101b */ + "Res 0x106 error", /* 1_0110b */ + "Res 0x107 error", /* 1_0111b */ + "Res 0x108 error", /* 1_1000b */ + "Res 0x109 error", /* 1_1001b */ + "Res 0x10A error", /* 1_1010b */ + "Res 0x10B error", /* 1_1011b */ + "L3 Cache Data error", /* 1_1100b */ + "L3 CacheTag error", /* 1_1101b */ + "L3 Cache LRU error", /* 1_1110b */ + "Res 0x1FF error" /* 1_1111b */ +}; + +const char *htlink_msgs[] = { + "none", + "1", + "2", + "1 2", + "3", + "1 3", + "2 3", + "1 2 3" +}; diff --git a/drivers/edac/amd64_edac_inj.c b/drivers/edac/amd64_edac_inj.c new file mode 100644 index 000000000000..d3675b76b3a7 --- /dev/null +++ b/drivers/edac/amd64_edac_inj.c @@ -0,0 +1,185 @@ +#include "amd64_edac.h" + +/* + * store error injection section value which refers to one of 4 16-byte sections + * within a 64-byte cacheline + * + * range: 0..3 + */ +static ssize_t amd64_inject_section_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 10, &value); + if (ret != -EINVAL) { + pvt->injection.section = (u32) value; + return count; + } + return ret; +} + +/* + * store error injection word value which refers to one of 9 16-bit word of the + * 16-byte (128-bit + ECC bits) section + * + * range: 0..8 + */ +static ssize_t amd64_inject_word_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 10, &value); + if (ret != -EINVAL) { + + value = (value <= 8) ? value : 0; + pvt->injection.word = (u32) value; + + return count; + } + return ret; +} + +/* + * store 16 bit error injection vector which enables injecting errors to the + * corresponding bit within the error injection word above. When used during a + * DRAM ECC read, it holds the contents of the of the DRAM ECC bits. + */ +static ssize_t amd64_inject_ecc_vector_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + int ret = 0; + + ret = strict_strtoul(data, 16, &value); + if (ret != -EINVAL) { + + pvt->injection.bit_map = (u32) value & 0xFFFF; + + return count; + } + return ret; +} + +/* + * Do a DRAM ECC read. Assemble staged values in the pvt area, format into + * fields needed by the injection registers and read the NB Array Data Port. + */ +static ssize_t amd64_inject_read_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + u32 section, word_bits; + int ret = 0; + + ret = strict_strtoul(data, 10, &value); + if (ret != -EINVAL) { + + /* Form value to choose 16-byte section of cacheline */ + section = F10_NB_ARRAY_DRAM_ECC | + SET_NB_ARRAY_ADDRESS(pvt->injection.section); + pci_write_config_dword(pvt->misc_f3_ctl, + F10_NB_ARRAY_ADDR, section); + + word_bits = SET_NB_DRAM_INJECTION_READ(pvt->injection.word, + pvt->injection.bit_map); + + /* Issue 'word' and 'bit' along with the READ request */ + pci_write_config_dword(pvt->misc_f3_ctl, + F10_NB_ARRAY_DATA, word_bits); + + debugf0("section=0x%x word_bits=0x%x\n", section, word_bits); + + return count; + } + return ret; +} + +/* + * Do a DRAM ECC write. Assemble staged values in the pvt area and format into + * fields needed by the injection registers. + */ +static ssize_t amd64_inject_write_store(struct mem_ctl_info *mci, + const char *data, size_t count) +{ + struct amd64_pvt *pvt = mci->pvt_info; + unsigned long value; + u32 section, word_bits; + int ret = 0; + + ret = strict_strtoul(data, 10, &value); + if (ret != -EINVAL) { + + /* Form value to choose 16-byte section of cacheline */ + section = F10_NB_ARRAY_DRAM_ECC | + SET_NB_ARRAY_ADDRESS(pvt->injection.section); + pci_write_config_dword(pvt->misc_f3_ctl, + F10_NB_ARRAY_ADDR, section); + + word_bits = SET_NB_DRAM_INJECTION_WRITE(pvt->injection.word, + pvt->injection.bit_map); + + /* Issue 'word' and 'bit' along with the READ request */ + pci_write_config_dword(pvt->misc_f3_ctl, + F10_NB_ARRAY_DATA, word_bits); + + debugf0("section=0x%x word_bits=0x%x\n", section, word_bits); + + return count; + } + return ret; +} + +/* + * update NUM_INJ_ATTRS in case you add new members + */ +struct mcidev_sysfs_attribute amd64_inj_attrs[] = { + + { + .attr = { + .name = "inject_section", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = NULL, + .store = amd64_inject_section_store, + }, + { + .attr = { + .name = "inject_word", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = NULL, + .store = amd64_inject_word_store, + }, + { + .attr = { + .name = "inject_ecc_vector", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = NULL, + .store = amd64_inject_ecc_vector_store, + }, + { + .attr = { + .name = "inject_write", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = NULL, + .store = amd64_inject_write_store, + }, + { + .attr = { + .name = "inject_read", + .mode = (S_IRUGO | S_IWUSR) + }, + .show = NULL, + .store = amd64_inject_read_store, + }, +}; diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h index 6ad95c8d6363..48d3b1409834 100644 --- a/drivers/edac/edac_core.h +++ b/drivers/edac/edac_core.h @@ -76,10 +76,11 @@ extern int edac_debug_level; #ifndef CONFIG_EDAC_DEBUG_VERBOSE -#define edac_debug_printk(level, fmt, arg...) \ - do { \ - if (level <= edac_debug_level) \ - edac_printk(KERN_DEBUG, EDAC_DEBUG, fmt, ##arg); \ +#define edac_debug_printk(level, fmt, arg...) \ + do { \ + if (level <= edac_debug_level) \ + edac_printk(KERN_DEBUG, EDAC_DEBUG, \ + "%s: " fmt, __func__, ##arg); \ } while (0) #else /* CONFIG_EDAC_DEBUG_VERBOSE */ #define edac_debug_printk(level, fmt, arg...) \ |