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path: root/drivers/edac/sb_edac.c
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Diffstat (limited to 'drivers/edac/sb_edac.c')
-rw-r--r--drivers/edac/sb_edac.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 93f0d41..468447a 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -362,6 +362,7 @@ struct sbridge_pvt {
/* Memory type detection */
bool is_mirrored, is_lockstep, is_close_pg;
+ bool is_chan_hash;
/* Fifo double buffers */
struct mce mce_entry[MCE_LOG_LEN];
@@ -1060,6 +1061,20 @@ static inline u8 sad_pkg_ha(u8 pkg)
return (pkg >> 2) & 0x1;
}
+static int haswell_chan_hash(int idx, u64 addr)
+{
+ int i;
+
+ /*
+ * XOR even bits from 12:26 to bit0 of idx,
+ * odd bits from 13:27 to bit1
+ */
+ for (i = 12; i < 28; i += 2)
+ idx ^= (addr >> i) & 3;
+
+ return idx;
+}
+
/****************************************************************************
Memory check routines
****************************************************************************/
@@ -1616,6 +1631,10 @@ static int get_dimm_config(struct mem_ctl_info *mci)
KNL_MAX_CHANNELS : NUM_CHANNELS;
u64 knl_mc_sizes[KNL_MAX_CHANNELS];
+ if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL) {
+ pci_read_config_dword(pvt->pci_ha0, HASWELL_HASYSDEFEATURE2, &reg);
+ pvt->is_chan_hash = GET_BITFIELD(reg, 21, 21);
+ }
if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL ||
pvt->info.type == KNIGHTS_LANDING)
pci_read_config_dword(pvt->pci_sad1, SAD_TARGET, &reg);
@@ -2118,12 +2137,15 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
}
ch_way = TAD_CH(reg) + 1;
- sck_way = 1 << TAD_SOCK(reg);
+ sck_way = TAD_SOCK(reg);
if (ch_way == 3)
idx = addr >> 6;
- else
+ else {
idx = (addr >> (6 + sck_way + shiftup)) & 0x3;
+ if (pvt->is_chan_hash)
+ idx = haswell_chan_hash(idx, addr);
+ }
idx = idx % ch_way;
/*
@@ -2157,7 +2179,7 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
switch(ch_way) {
case 2:
case 4:
- sck_xch = 1 << sck_way * (ch_way >> 1);
+ sck_xch = (1 << sck_way) * (ch_way >> 1);
break;
default:
sprintf(msg, "Invalid mirror set. Can't decode addr");
@@ -2193,7 +2215,7 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
ch_addr = addr - offset;
ch_addr >>= (6 + shiftup);
- ch_addr /= ch_way * sck_way;
+ ch_addr /= sck_xch;
ch_addr <<= (6 + shiftup);
ch_addr |= addr & ((1 << (6 + shiftup)) - 1);