amd64_edac: add helper to dump relevant registers

Borislav:

- cleanup/fix comments
- fix function return value patterns
- cleanup dbg calls

Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

1 files changed, 142 insertions, 0 deletions

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 28f85c9e3afc..3d6d0007ed5d 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -729,3 +729,145 @@ static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 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);
+}
+