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authorYazen Ghannam <Yazen.Ghannam@amd.com>2016-11-17 17:57:34 -0500
committerBorislav Petkov <bp@suse.de>2016-11-24 21:07:03 +0100
commit196b79fcc8ed4e3c565a746b06125596bee06b62 (patch)
tree827918d113130cb7fd987f87e6a41ffd38548045 /drivers
parent627bc29ed90ca50dbf7a4e7b43c267a2920bbadb (diff)
downloadlinux-196b79fcc8ed4e3c565a746b06125596bee06b62.tar.bz2
EDAC, amd64: Extend ecc_enabled() to Fam17h
Update the ecc_enabled() function to work on Fam17h. This entails reading a different set of registers and using the SMN (System Management Network) rather than PCI devices. Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com> Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com> Cc: linux-edac <linux-edac@vger.kernel.org> Cc: x86-ml <x86@kernel.org> Link: http://lkml.kernel.org/r/1479423463-8536-9-git-send-email-Yazen.Ghannam@amd.com [ Fixup ecc_en assignment and get_umc_base(). ] Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/edac/amd64_edac.c50
-rw-r--r--drivers/edac/amd64_edac.h16
2 files changed, 56 insertions, 10 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index ca1d63aa4e59..870f56713c22 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2664,20 +2664,50 @@ static const char *ecc_msg =
static bool ecc_enabled(struct pci_dev *F3, u16 nid)
{
- u32 value;
- u8 ecc_en = 0;
bool nb_mce_en = false;
+ u8 ecc_en = 0, i;
+ u32 value;
- amd64_read_pci_cfg(F3, NBCFG, &value);
+ if (boot_cpu_data.x86 >= 0x17) {
+ u8 umc_en_mask = 0, ecc_en_mask = 0;
- ecc_en = !!(value & NBCFG_ECC_ENABLE);
- amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
+ for (i = 0; i < NUM_UMCS; i++) {
+ u32 base = get_umc_base(i);
+
+ /* Only check enabled UMCs. */
+ if (amd_smn_read(nid, base + UMCCH_SDP_CTRL, &value))
+ continue;
+
+ if (!(value & UMC_SDP_INIT))
+ continue;
+
+ umc_en_mask |= BIT(i);
+
+ if (amd_smn_read(nid, base + UMCCH_UMC_CAP_HI, &value))
+ continue;
+
+ if (value & UMC_ECC_ENABLED)
+ ecc_en_mask |= BIT(i);
+ }
+
+ /* Check whether at least one UMC is enabled: */
+ if (umc_en_mask)
+ ecc_en = umc_en_mask == ecc_en_mask;
+
+ /* Assume UMC MCA banks are enabled. */
+ nb_mce_en = true;
+ } else {
+ amd64_read_pci_cfg(F3, NBCFG, &value);
- nb_mce_en = nb_mce_bank_enabled_on_node(nid);
- if (!nb_mce_en)
- amd64_notice("NB MCE bank disabled, set MSR "
- "0x%08x[4] on node %d to enable.\n",
- MSR_IA32_MCG_CTL, nid);
+ ecc_en = !!(value & NBCFG_ECC_ENABLE);
+
+ nb_mce_en = nb_mce_bank_enabled_on_node(nid);
+ if (!nb_mce_en)
+ amd64_notice("NB MCE bank disabled, set MSR 0x%08x[4] on node %d to enable.\n",
+ MSR_IA32_MCG_CTL, nid);
+ }
+
+ amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
if (!ecc_en || !nb_mce_en) {
amd64_notice("%s", ecc_msg);
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index c08870479054..96c1f5d6d130 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -248,6 +248,16 @@
/* MSRs */
#define MSR_MCGCTL_NBE BIT(4)
+/* UMC CH register offsets */
+#define UMCCH_SDP_CTRL 0x104
+#define UMCCH_UMC_CAP_HI 0xDF4
+
+/* UMC CH bitfields */
+#define UMC_ECC_ENABLED BIT(30)
+#define UMC_SDP_INIT BIT(31)
+
+#define NUM_UMCS 2
+
enum amd_families {
K8_CPUS = 0,
F10_CPUS,
@@ -354,6 +364,12 @@ struct err_info {
u32 offset;
};
+static inline u32 get_umc_base(u8 channel)
+{
+ /* ch0: 0x50000, ch1: 0x150000 */
+ return 0x50000 + (!!channel << 20);
+}
+
static inline u64 get_dram_base(struct amd64_pvt *pvt, u8 i)
{
u64 addr = ((u64)pvt->ranges[i].base.lo & 0xffff0000) << 8;