diff options
| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2019-08-21 23:59:56 +0000 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-08-23 06:58:31 +0200 |
| commit | f8be8e5680225ac9caf07d4545f8529b7395327f (patch) | |
| tree | 75dfff0355105f0bbecc4d3ee865884be327056c /drivers/edac | |
| parent | d971e28e2ce4696fcc32998c8aced5e47701fffe (diff) | |
| download | linux-f8be8e5680225ac9caf07d4545f8529b7395327f.tar.bz2 | |
EDAC/amd64: Recognize DRAM device type ECC capability
AMD Family 17h systems support x4 and x16 DRAM devices. However, the
device type is not checked when setting mci.edac_ctl_cap.
Set the appropriate capability flag based on the device type.
Default to x8 DRAM device when neither the x4 or x16 bits are set.
[ bp: reverse cpk_en check to save an indentation level. ]
Fixes: 2d09d8f301f5 ("EDAC, amd64: Determine EDAC MC capabilities on Fam17h")
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20190821235938.118710-3-Yazen.Ghannam@amd.com
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/amd64_edac.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index dd60cf5a3d96..ffe56a8fe39d 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -3150,12 +3150,15 @@ static bool ecc_enabled(struct pci_dev *F3, u16 nid) static inline void f17h_determine_edac_ctl_cap(struct mem_ctl_info *mci, struct amd64_pvt *pvt) { - u8 i, ecc_en = 1, cpk_en = 1; + u8 i, ecc_en = 1, cpk_en = 1, dev_x4 = 1, dev_x16 = 1; for_each_umc(i) { if (pvt->umc[i].sdp_ctrl & UMC_SDP_INIT) { ecc_en &= !!(pvt->umc[i].umc_cap_hi & UMC_ECC_ENABLED); cpk_en &= !!(pvt->umc[i].umc_cap_hi & UMC_ECC_CHIPKILL_CAP); + + dev_x4 &= !!(pvt->umc[i].dimm_cfg & BIT(6)); + dev_x16 &= !!(pvt->umc[i].dimm_cfg & BIT(7)); } } @@ -3163,8 +3166,15 @@ f17h_determine_edac_ctl_cap(struct mem_ctl_info *mci, struct amd64_pvt *pvt) if (ecc_en) { mci->edac_ctl_cap |= EDAC_FLAG_SECDED; - if (cpk_en) + if (!cpk_en) + return; + + if (dev_x4) mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED; + else if (dev_x16) + mci->edac_ctl_cap |= EDAC_FLAG_S16ECD16ED; + else + mci->edac_ctl_cap |= EDAC_FLAG_S8ECD8ED; } } |