blob: ef9135f0354c435b9635ccdab105134da5bb21a7 [file] [log] [blame]
From 0db55a75c4aa5aa7b59cee36b635a1086aad22cc Mon Sep 17 00:00:00 2001
From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Date: Fri, 15 May 2020 20:34:06 +0800
Subject: [PATCH] EDAC/skx: Use the mcmtr register to retrieve
close_pg/bank_xor_enable
commit 1032095053b34d474aa20f2625d97dd306e0991b upstream.
The skx_edac driver wrongly uses the mtr register to retrieve two fields
close_pg and bank_xor_enable. Fix it by using the correct mcmtr register
to get the two fields.
Cc: <stable@vger.kernel.org>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Reported-by: Matthew Riley <mattdr@google.com>
Acked-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20200515210146.1337-1-tony.luck@intel.com
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
index 6f06aec4877c..217ba0f7fd7a 100644
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -160,7 +160,7 @@ static int i10nm_get_dimm_config(struct mem_ctl_info *mci)
mtr, mcddrtcfg, imc->mc, i, j);
if (IS_DIMM_PRESENT(mtr))
- ndimms += skx_get_dimm_info(mtr, 0, dimm,
+ ndimms += skx_get_dimm_info(mtr, 0, 0, dimm,
imc, i, j);
else if (IS_NVDIMM_PRESENT(mcddrtcfg, j))
ndimms += skx_get_nvdimm_info(dimm, imc, i, j,
diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index a5c8fa3a249a..1c27e1856f0a 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -151,27 +151,23 @@ static const struct x86_cpu_id skx_cpuids[] = {
};
MODULE_DEVICE_TABLE(x86cpu, skx_cpuids);
-#define SKX_GET_MTMTR(dev, reg) \
- pci_read_config_dword((dev), 0x87c, &(reg))
-
-static bool skx_check_ecc(struct pci_dev *pdev)
+static bool skx_check_ecc(u32 mcmtr)
{
- u32 mtmtr;
-
- SKX_GET_MTMTR(pdev, mtmtr);
-
- return !!GET_BITFIELD(mtmtr, 2, 2);
+ return !!GET_BITFIELD(mcmtr, 2, 2);
}
static int skx_get_dimm_config(struct mem_ctl_info *mci)
{
struct skx_pvt *pvt = mci->pvt_info;
+ u32 mtr, mcmtr, amap, mcddrtcfg;
struct skx_imc *imc = pvt->imc;
- u32 mtr, amap, mcddrtcfg;
struct dimm_info *dimm;
int i, j;
int ndimms;
+ /* Only the mcmtr on the first channel is effective */
+ pci_read_config_dword(imc->chan[0].cdev, 0x87c, &mcmtr);
+
for (i = 0; i < SKX_NUM_CHANNELS; i++) {
ndimms = 0;
pci_read_config_dword(imc->chan[i].cdev, 0x8C, &amap);
@@ -182,14 +178,14 @@ static int skx_get_dimm_config(struct mem_ctl_info *mci)
pci_read_config_dword(imc->chan[i].cdev,
0x80 + 4 * j, &mtr);
if (IS_DIMM_PRESENT(mtr)) {
- ndimms += skx_get_dimm_info(mtr, amap, dimm, imc, i, j);
+ ndimms += skx_get_dimm_info(mtr, mcmtr, amap, dimm, imc, i, j);
} else if (IS_NVDIMM_PRESENT(mcddrtcfg, j)) {
ndimms += skx_get_nvdimm_info(dimm, imc, i, j,
EDAC_MOD_STR);
nvdimm_count++;
}
}
- if (ndimms && !skx_check_ecc(imc->chan[0].cdev)) {
+ if (ndimms && !skx_check_ecc(mcmtr)) {
skx_printk(KERN_ERR, "ECC is disabled on imc %d\n", imc->mc);
return -ENODEV;
}
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index 2e503cf8bc91..b8b7405a5ac4 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -283,7 +283,7 @@ static int skx_get_dimm_attr(u32 reg, int lobit, int hibit, int add,
#define numrow(reg) skx_get_dimm_attr(reg, 2, 4, 12, 1, 6, "rows")
#define numcol(reg) skx_get_dimm_attr(reg, 0, 1, 10, 0, 2, "cols")
-int skx_get_dimm_info(u32 mtr, u32 amap, struct dimm_info *dimm,
+int skx_get_dimm_info(u32 mtr, u32 mcmtr, u32 amap, struct dimm_info *dimm,
struct skx_imc *imc, int chan, int dimmno)
{
int banks = 16, ranks, rows, cols, npages;
@@ -303,8 +303,8 @@ int skx_get_dimm_info(u32 mtr, u32 amap, struct dimm_info *dimm,
imc->mc, chan, dimmno, size, npages,
banks, 1 << ranks, rows, cols);
- imc->chan[chan].dimms[dimmno].close_pg = GET_BITFIELD(mtr, 0, 0);
- imc->chan[chan].dimms[dimmno].bank_xor_enable = GET_BITFIELD(mtr, 9, 9);
+ imc->chan[chan].dimms[dimmno].close_pg = GET_BITFIELD(mcmtr, 0, 0);
+ imc->chan[chan].dimms[dimmno].bank_xor_enable = GET_BITFIELD(mcmtr, 9, 9);
imc->chan[chan].dimms[dimmno].fine_grain_bank = GET_BITFIELD(amap, 0, 0);
imc->chan[chan].dimms[dimmno].rowbits = rows;
imc->chan[chan].dimms[dimmno].colbits = cols;
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index d18fa98669af..3207606ea10b 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -126,7 +126,7 @@ int skx_get_all_bus_mappings(unsigned int did, int off, enum type,
int skx_get_hi_lo(unsigned int did, int off[], u64 *tolm, u64 *tohm);
-int skx_get_dimm_info(u32 mtr, u32 amap, struct dimm_info *dimm,
+int skx_get_dimm_info(u32 mtr, u32 mcmtr, u32 amap, struct dimm_info *dimm,
struct skx_imc *imc, int chan, int dimmno);
int skx_get_nvdimm_info(struct dimm_info *dimm, struct skx_imc *imc,
--
2.27.0