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path: root/drivers/edac/edac_mce_amd.c
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Diffstat (limited to 'drivers/edac/edac_mce_amd.c')
-rw-r--r--drivers/edac/edac_mce_amd.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/edac/edac_mce_amd.c b/drivers/edac/edac_mce_amd.c
new file mode 100644
index 000000000000..c8ca7136dacc
--- /dev/null
+++ b/drivers/edac/edac_mce_amd.c
@@ -0,0 +1,422 @@
+#include <linux/module.h>
+#include "edac_mce_amd.h"
+
+static bool report_gart_errors;
+static void (*nb_bus_decoder)(int node_id, struct err_regs *regs);
+
+void amd_report_gart_errors(bool v)
+{
+ report_gart_errors = v;
+}
+EXPORT_SYMBOL_GPL(amd_report_gart_errors);
+
+void amd_register_ecc_decoder(void (*f)(int, struct err_regs *))
+{
+ nb_bus_decoder = f;
+}
+EXPORT_SYMBOL_GPL(amd_register_ecc_decoder);
+
+void amd_unregister_ecc_decoder(void (*f)(int, struct err_regs *))
+{
+ if (nb_bus_decoder) {
+ WARN_ON(nb_bus_decoder != f);
+
+ nb_bus_decoder = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(amd_unregister_ecc_decoder);
+
+/*
+ * string representation for the different MCA reported error types, see F3x48
+ * or MSR0000_0411.
+ */
+const char *tt_msgs[] = { /* transaction type */
+ "instruction",
+ "data",
+ "generic",
+ "reserved"
+};
+EXPORT_SYMBOL_GPL(tt_msgs);
+
+const char *ll_msgs[] = { /* cache level */
+ "L0",
+ "L1",
+ "L2",
+ "L3/generic"
+};
+EXPORT_SYMBOL_GPL(ll_msgs);
+
+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"
+};
+EXPORT_SYMBOL_GPL(rrrr_msgs);
+
+const char *pp_msgs[] = { /* participating processor */
+ "local node originated (SRC)",
+ "local node responded to request (RES)",
+ "local node observed as 3rd party (OBS)",
+ "generic"
+};
+EXPORT_SYMBOL_GPL(pp_msgs);
+
+const char *to_msgs[] = {
+ "no timeout",
+ "timed out"
+};
+EXPORT_SYMBOL_GPL(to_msgs);
+
+const char *ii_msgs[] = { /* memory or i/o */
+ "mem access",
+ "reserved",
+ "i/o access",
+ "generic"
+};
+EXPORT_SYMBOL_GPL(ii_msgs);
+
+/*
+ * Map the 4 or 5 (family-specific) bits of Extended Error code to the
+ * string table.
+ */
+const char *ext_msgs[] = {
+ "K8 ECC error", /* 0_0000b */
+ "CRC error on link", /* 0_0001b */
+ "Sync error packets on link", /* 0_0010b */
+ "Master Abort during link operation", /* 0_0011b */
+ "Target Abort during link operation", /* 0_0100b */
+ "Invalid GART PTE entry during table walk", /* 0_0101b */
+ "Unsupported atomic RMW command received", /* 0_0110b */
+ "WDT error: NB transaction timeout", /* 0_0111b */
+ "ECC/ChipKill ECC error", /* 0_1000b */
+ "SVM DEV Error", /* 0_1001b */
+ "Link Data error", /* 0_1010b */
+ "Link/L3/Probe Filter Protocol error", /* 0_1011b */
+ "NB Internal Arrays Parity error", /* 0_1100b */
+ "DRAM Address/Control Parity error", /* 0_1101b */
+ "Link Transmission error", /* 0_1110b */
+ "GART/DEV Table Walk Data 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 */
+ "ECC error in L3 Cache Data", /* 1_1100b */
+ "L3 Cache Tag error", /* 1_1101b */
+ "L3 Cache LRU Parity error", /* 1_1110b */
+ "Probe Filter error" /* 1_1111b */
+};
+EXPORT_SYMBOL_GPL(ext_msgs);
+
+static void amd_decode_dc_mce(u64 mc0_status)
+{
+ u32 ec = mc0_status & 0xffff;
+ u32 xec = (mc0_status >> 16) & 0xf;
+
+ pr_emerg(" Data Cache Error");
+
+ if (xec == 1 && TLB_ERROR(ec))
+ pr_cont(": %s TLB multimatch.\n", LL_MSG(ec));
+ else if (xec == 0) {
+ if (mc0_status & (1ULL << 40))
+ pr_cont(" during Data Scrub.\n");
+ else if (TLB_ERROR(ec))
+ pr_cont(": %s TLB parity error.\n", LL_MSG(ec));
+ else if (MEM_ERROR(ec)) {
+ u8 ll = ec & 0x3;
+ u8 tt = (ec >> 2) & 0x3;
+ u8 rrrr = (ec >> 4) & 0xf;
+
+ /* see F10h BKDG (31116), Table 92. */
+ if (ll == 0x1) {
+ if (tt != 0x1)
+ goto wrong_dc_mce;
+
+ pr_cont(": Data/Tag %s error.\n", RRRR_MSG(ec));
+
+ } else if (ll == 0x2 && rrrr == 0x3)
+ pr_cont(" during L1 linefill from L2.\n");
+ else
+ goto wrong_dc_mce;
+ } else if (BUS_ERROR(ec) && boot_cpu_data.x86 == 0xf)
+ pr_cont(" during system linefill.\n");
+ else
+ goto wrong_dc_mce;
+ } else
+ goto wrong_dc_mce;
+
+ return;
+
+wrong_dc_mce:
+ pr_warning("Corrupted DC MCE info?\n");
+}
+
+static void amd_decode_ic_mce(u64 mc1_status)
+{
+ u32 ec = mc1_status & 0xffff;
+ u32 xec = (mc1_status >> 16) & 0xf;
+
+ pr_emerg(" Instruction Cache Error");
+
+ if (xec == 1 && TLB_ERROR(ec))
+ pr_cont(": %s TLB multimatch.\n", LL_MSG(ec));
+ else if (xec == 0) {
+ if (TLB_ERROR(ec))
+ pr_cont(": %s TLB Parity error.\n", LL_MSG(ec));
+ else if (BUS_ERROR(ec)) {
+ if (boot_cpu_data.x86 == 0xf &&
+ (mc1_status & (1ULL << 58)))
+ pr_cont(" during system linefill.\n");
+ else
+ pr_cont(" during attempted NB data read.\n");
+ } else if (MEM_ERROR(ec)) {
+ u8 ll = ec & 0x3;
+ u8 rrrr = (ec >> 4) & 0xf;
+
+ if (ll == 0x2)
+ pr_cont(" during a linefill from L2.\n");
+ else if (ll == 0x1) {
+
+ switch (rrrr) {
+ case 0x5:
+ pr_cont(": Parity error during "
+ "data load.\n");
+ break;
+
+ case 0x7:
+ pr_cont(": Copyback Parity/Victim"
+ " error.\n");
+ break;
+
+ case 0x8:
+ pr_cont(": Tag Snoop error.\n");
+ break;
+
+ default:
+ goto wrong_ic_mce;
+ break;
+ }
+ }
+ } else
+ goto wrong_ic_mce;
+ } else
+ goto wrong_ic_mce;
+
+ return;
+
+wrong_ic_mce:
+ pr_warning("Corrupted IC MCE info?\n");
+}
+
+static void amd_decode_bu_mce(u64 mc2_status)
+{
+ u32 ec = mc2_status & 0xffff;
+ u32 xec = (mc2_status >> 16) & 0xf;
+
+ pr_emerg(" Bus Unit Error");
+
+ if (xec == 0x1)
+ pr_cont(" in the write data buffers.\n");
+ else if (xec == 0x3)
+ pr_cont(" in the victim data buffers.\n");
+ else if (xec == 0x2 && MEM_ERROR(ec))
+ pr_cont(": %s error in the L2 cache tags.\n", RRRR_MSG(ec));
+ else if (xec == 0x0) {
+ if (TLB_ERROR(ec))
+ pr_cont(": %s error in a Page Descriptor Cache or "
+ "Guest TLB.\n", TT_MSG(ec));
+ else if (BUS_ERROR(ec))
+ pr_cont(": %s/ECC error in data read from NB: %s.\n",
+ RRRR_MSG(ec), PP_MSG(ec));
+ else if (MEM_ERROR(ec)) {
+ u8 rrrr = (ec >> 4) & 0xf;
+
+ if (rrrr >= 0x7)
+ pr_cont(": %s error during data copyback.\n",
+ RRRR_MSG(ec));
+ else if (rrrr <= 0x1)
+ pr_cont(": %s parity/ECC error during data "
+ "access from L2.\n", RRRR_MSG(ec));
+ else
+ goto wrong_bu_mce;
+ } else
+ goto wrong_bu_mce;
+ } else
+ goto wrong_bu_mce;
+
+ return;
+
+wrong_bu_mce:
+ pr_warning("Corrupted BU MCE info?\n");
+}
+
+static void amd_decode_ls_mce(u64 mc3_status)
+{
+ u32 ec = mc3_status & 0xffff;
+ u32 xec = (mc3_status >> 16) & 0xf;
+
+ pr_emerg(" Load Store Error");
+
+ if (xec == 0x0) {
+ u8 rrrr = (ec >> 4) & 0xf;
+
+ if (!BUS_ERROR(ec) || (rrrr != 0x3 && rrrr != 0x4))
+ goto wrong_ls_mce;
+
+ pr_cont(" during %s.\n", RRRR_MSG(ec));
+ }
+ return;
+
+wrong_ls_mce:
+ pr_warning("Corrupted LS MCE info?\n");
+}
+
+void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)
+{
+ u32 ec = ERROR_CODE(regs->nbsl);
+ u32 xec = EXT_ERROR_CODE(regs->nbsl);
+
+ if (!handle_errors)
+ return;
+
+ pr_emerg(" Northbridge Error, node %d", node_id);
+
+ /*
+ * F10h, revD can disable ErrCpu[3:0] so check that first and also the
+ * value encoding has changed so interpret those differently
+ */
+ if ((boot_cpu_data.x86 == 0x10) &&
+ (boot_cpu_data.x86_model > 8)) {
+ if (regs->nbsh & K8_NBSH_ERR_CPU_VAL)
+ pr_cont(", core: %u\n", (u8)(regs->nbsh & 0xf));
+ } else {
+ pr_cont(", core: %d\n", ilog2((regs->nbsh & 0xf)));
+ }
+
+
+ pr_emerg("%s.\n", EXT_ERR_MSG(xec));
+
+ if (BUS_ERROR(ec) && nb_bus_decoder)
+ nb_bus_decoder(node_id, regs);
+}
+EXPORT_SYMBOL_GPL(amd_decode_nb_mce);
+
+static void amd_decode_fr_mce(u64 mc5_status)
+{
+ /* we have only one error signature so match all fields at once. */
+ if ((mc5_status & 0xffff) == 0x0f0f)
+ pr_emerg(" FR Error: CPU Watchdog timer expire.\n");
+ else
+ pr_warning("Corrupted FR MCE info?\n");
+}
+
+static inline void amd_decode_err_code(unsigned int ec)
+{
+ if (TLB_ERROR(ec)) {
+ /*
+ * 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)
+ return;
+
+ pr_emerg(" Transaction: %s, Cache Level %s\n",
+ TT_MSG(ec), LL_MSG(ec));
+ } else if (MEM_ERROR(ec)) {
+ pr_emerg(" Transaction: %s, Type: %s, Cache Level: %s",
+ RRRR_MSG(ec), TT_MSG(ec), LL_MSG(ec));
+ } else if (BUS_ERROR(ec)) {
+ pr_emerg(" Transaction type: %s(%s), %s, Cache Level: %s, "
+ "Participating Processor: %s\n",
+ RRRR_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec),
+ PP_MSG(ec));
+ } else
+ pr_warning("Huh? Unknown MCE error 0x%x\n", ec);
+}
+
+void decode_mce(struct mce *m)
+{
+ struct err_regs regs;
+ int node, ecc;
+
+ pr_emerg("MC%d_STATUS: ", m->bank);
+
+ pr_cont("%sorrected error, report: %s, MiscV: %svalid, "
+ "CPU context corrupt: %s",
+ ((m->status & MCI_STATUS_UC) ? "Unc" : "C"),
+ ((m->status & MCI_STATUS_EN) ? "yes" : "no"),
+ ((m->status & MCI_STATUS_MISCV) ? "" : "in"),
+ ((m->status & MCI_STATUS_PCC) ? "yes" : "no"));
+
+ /* do the two bits[14:13] together */
+ ecc = m->status & (3ULL << 45);
+ if (ecc)
+ pr_cont(", %sECC Error", ((ecc == 2) ? "C" : "U"));
+
+ pr_cont("\n");
+
+ switch (m->bank) {
+ case 0:
+ amd_decode_dc_mce(m->status);
+ break;
+
+ case 1:
+ amd_decode_ic_mce(m->status);
+ break;
+
+ case 2:
+ amd_decode_bu_mce(m->status);
+ break;
+
+ case 3:
+ amd_decode_ls_mce(m->status);
+ break;
+
+ case 4:
+ regs.nbsl = (u32) m->status;
+ regs.nbsh = (u32)(m->status >> 32);
+ regs.nbeal = (u32) m->addr;
+ regs.nbeah = (u32)(m->addr >> 32);
+ node = per_cpu(cpu_llc_id, m->extcpu);
+
+ amd_decode_nb_mce(node, &regs, 1);
+ break;
+
+ case 5:
+ amd_decode_fr_mce(m->status);
+ break;
+
+ default:
+ break;
+ }
+
+ amd_decode_err_code(m->status & 0xffff);
+}
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