[PATCH v3 5/6] EDAC/amd64: Support more than two Controllers for Chip Select handling
From: Ghannam, Yazen
Date: Thu Feb 28 2019 - 10:36:32 EST
From: Yazen Ghannam <yazen.ghannam@xxxxxxx>
The struct chip_select array that's used for saving Chip Select bases
and masks is fixed at length of two. There should be one struct
chip_select for each controller, so this array should be increased to
support systems that may have more than two controllers.
Increase the size of the struct chip_select array to eight, which is the
largest number of controllers per die currently supported on AMD
systems.
Also, carve out the Family 17h+ reading of the bases/masks into a
separate function. This effectively reverts the original bases/masks
reading code to before Family 17h support was added.
Signed-off-by: Yazen Ghannam <yazen.ghannam@xxxxxxx>
---
Link:
https://lkml.kernel.org/r/20190226172532.12924-5-Yazen.Ghannam@xxxxxxx
v2->v3:
* Reword commit message a bit.
v1->v2:
* No change.
drivers/edac/amd64_edac.c | 113 ++++++++++++++++++++------------------
drivers/edac/amd64_edac.h | 5 +-
2 files changed, 62 insertions(+), 56 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 2da69010ea8e..c05995685cfa 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -911,89 +911,94 @@ static void prep_chip_selects(struct amd64_pvt *pvt)
} else if (pvt->fam == 0x15 && pvt->model == 0x30) {
pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
+ } else if (pvt->fam >= 0x17) {
+ int umc;
+
+ for_each_umc(umc) {
+ pvt->csels[umc].b_cnt = 8;
+ pvt->csels[umc].m_cnt = 4;
+ }
+
} else {
pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
}
}
+static void read_umc_base_mask(struct amd64_pvt *pvt)
+{
+ int cs, umc;
+
+ for_each_umc(umc) {
+ u32 umc_base_reg = get_umc_base(umc) + UMCCH_BASE_ADDR;
+ u32 umc_mask_reg = get_umc_base(umc) + UMCCH_ADDR_MASK;
+
+ for_each_chip_select(cs, 0, pvt) {
+ u32 *base = &pvt->csels[umc].csbases[cs];
+ u32 *mask = &pvt->csels[umc].csmasks[cs];
+
+ u32 base_reg = umc_base_reg + (cs * 4);
+ u32 mask_reg = umc_mask_reg + ((cs >> 1) * 4);
+
+ if (!amd_smn_read(pvt->mc_node_id, base_reg, base))
+ edac_dbg(0, " DCSB%d[%d]=0x%08x reg: 0x%x\n",
+ umc, cs, *base, base_reg);
+
+ if (!amd_smn_read(pvt->mc_node_id, mask_reg, mask))
+ edac_dbg(0, " DCSM%d[%d]=0x%08x reg: 0x%x\n",
+ umc, cs, *mask, mask_reg);
+ }
+ }
+}
+
/*
* Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
*/
static void read_dct_base_mask(struct amd64_pvt *pvt)
{
- int base_reg0, base_reg1, mask_reg0, mask_reg1, cs;
+ int cs;
prep_chip_selects(pvt);
- if (pvt->umc) {
- base_reg0 = get_umc_base(0) + UMCCH_BASE_ADDR;
- base_reg1 = get_umc_base(1) + UMCCH_BASE_ADDR;
- mask_reg0 = get_umc_base(0) + UMCCH_ADDR_MASK;
- mask_reg1 = get_umc_base(1) + UMCCH_ADDR_MASK;
- } else {
- base_reg0 = DCSB0;
- base_reg1 = DCSB1;
- mask_reg0 = DCSM0;
- mask_reg1 = DCSM1;
- }
+ if (pvt->umc)
+ return read_umc_base_mask(pvt);
for_each_chip_select(cs, 0, pvt) {
- int reg0 = base_reg0 + (cs * 4);
- int reg1 = base_reg1 + (cs * 4);
+ int reg0 = DCSB0 + (cs * 4);
+ int reg1 = DCSB1 + (cs * 4);
u32 *base0 = &pvt->csels[0].csbases[cs];
u32 *base1 = &pvt->csels[1].csbases[cs];
- if (pvt->umc) {
- if (!amd_smn_read(pvt->mc_node_id, reg0, base0))
- edac_dbg(0, " DCSB0[%d]=0x%08x reg: 0x%x\n",
- cs, *base0, reg0);
+ if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, base0))
+ edac_dbg(0, " DCSB0[%d]=0x%08x reg: F2x%x\n",
+ cs, *base0, reg0);
- if (!amd_smn_read(pvt->mc_node_id, reg1, base1))
- edac_dbg(0, " DCSB1[%d]=0x%08x reg: 0x%x\n",
- cs, *base1, reg1);
- } else {
- if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, base0))
- edac_dbg(0, " DCSB0[%d]=0x%08x reg: F2x%x\n",
- cs, *base0, reg0);
-
- if (pvt->fam == 0xf)
- continue;
+ if (pvt->fam == 0xf)
+ continue;
- if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, base1))
- edac_dbg(0, " DCSB1[%d]=0x%08x reg: F2x%x\n",
- cs, *base1, (pvt->fam == 0x10) ? reg1
- : reg0);
- }
+ if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, base1))
+ edac_dbg(0, " DCSB1[%d]=0x%08x reg: F2x%x\n",
+ cs, *base1, (pvt->fam == 0x10) ? reg1
+ : reg0);
}
for_each_chip_select_mask(cs, 0, pvt) {
- int reg0 = mask_reg0 + (cs * 4);
- int reg1 = mask_reg1 + (cs * 4);
+ int reg0 = DCSM0 + (cs * 4);
+ int reg1 = DCSM1 + (cs * 4);
u32 *mask0 = &pvt->csels[0].csmasks[cs];
u32 *mask1 = &pvt->csels[1].csmasks[cs];
- if (pvt->umc) {
- if (!amd_smn_read(pvt->mc_node_id, reg0, mask0))
- edac_dbg(0, " DCSM0[%d]=0x%08x reg: 0x%x\n",
- cs, *mask0, reg0);
-
- if (!amd_smn_read(pvt->mc_node_id, reg1, mask1))
- edac_dbg(0, " DCSM1[%d]=0x%08x reg: 0x%x\n",
- cs, *mask1, reg1);
- } else {
- if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, mask0))
- edac_dbg(0, " DCSM0[%d]=0x%08x reg: F2x%x\n",
- cs, *mask0, reg0);
+ if (!amd64_read_dct_pci_cfg(pvt, 0, reg0, mask0))
+ edac_dbg(0, " DCSM0[%d]=0x%08x reg: F2x%x\n",
+ cs, *mask0, reg0);
- if (pvt->fam == 0xf)
- continue;
+ if (pvt->fam == 0xf)
+ continue;
- if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, mask1))
- edac_dbg(0, " DCSM1[%d]=0x%08x reg: F2x%x\n",
- cs, *mask1, (pvt->fam == 0x10) ? reg1
- : reg0);
- }
+ if (!amd64_read_dct_pci_cfg(pvt, 1, reg0, mask1))
+ edac_dbg(0, " DCSM1[%d]=0x%08x reg: F2x%x\n",
+ cs, *mask1, (pvt->fam == 0x10) ? reg1
+ : reg0);
}
}
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 44d81eccfe0a..2191ddfb066f 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -96,6 +96,7 @@
/* Hardware limit on ChipSelect rows per MC and processors per system */
#define NUM_CHIPSELECTS 8
#define DRAM_RANGES 8
+#define NUM_CONTROLLERS 8
#define ON true
#define OFF false
@@ -357,8 +358,8 @@ struct amd64_pvt {
u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */
u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */
- /* one for each DCT */
- struct chip_select csels[2];
+ /* one for each DCT/UMC */
+ struct chip_select csels[NUM_CONTROLLERS];
/* DRAM base and limit pairs F1x[78,70,68,60,58,50,48,40] */
struct dram_range ranges[DRAM_RANGES];
--
2.17.1