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EDAC, amd64: Extend ecc_enabled() to Fam17h

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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>
This commit is contained in:
Yazen Ghannam 2016-11-17 17:57:34 -05:00 committed by Borislav Petkov
parent 627bc29ed9
commit 196b79fcc8
2 changed files with 56 additions and 10 deletions
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50
drivers/edac/amd64_edac.c
View File

@ -2664,21 +2664,51 @@ 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;
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);
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);
}
ecc_en = !!(value & NBCFG_ECC_ENABLE);
amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
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);
if (!ecc_en || !nb_mce_en) {
amd64_notice("%s", ecc_msg);
return false;

16
drivers/edac/amd64_edac.h
View File

@ -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;