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Message-Id: <20190425145554.5091-1-bp@alien8.de>
Date: Thu, 25 Apr 2019 16:55:54 +0200
From: Borislav Petkov <bp@...en8.de>
To: linux-edac <linux-edac@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Yazen Ghannam <yazen.ghannam@....com>
Subject: [PATCH] Revert "EDAC/amd64: Support more than two controllers for chip select handling"
From: Borislav Petkov <bp@...e.de>
This reverts commit 0a227af521d6df5286550b62f4b591417170b4ea.
Unfortunately, this commit caused wrong detection of chip select sizes
on some F17h client machines:
--- 00-rc6+ 2019-02-14 14:28:03.126622904 +0100
+++ 01-rc4+ 2019-04-14 21:06:16.060614790 +0200
EDAC amd64: MC: 0: 0MB 1: 0MB
-EDAC amd64: MC: 2: 16383MB 3: 16383MB
+EDAC amd64: MC: 2: 0MB 3: 2097151MB
EDAC amd64: MC: 4: 0MB 5: 0MB
EDAC amd64: MC: 6: 0MB 7: 0MB
EDAC MC: UMC1 chip selects:
EDAC amd64: MC: 0: 0MB 1: 0MB
-EDAC amd64: MC: 2: 16383MB 3: 16383MB
+EDAC amd64: MC: 2: 0MB 3: 2097151MB
EDAC amd64: MC: 4: 0MB 5: 0MB
EDAC amd64: MC: 6: 0MB 7: 0M
Revert it for now until it has been solved properly.
Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Yazen Ghannam <yazen.ghannam@....com>
---
drivers/edac/amd64_edac.c | 113 ++++++++++++++++++--------------------
drivers/edac/amd64_edac.h | 5 +-
2 files changed, 56 insertions(+), 62 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 4c0239aeff2f..e2a99466faaa 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -941,94 +941,89 @@ 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 cs;
+ int base_reg0, base_reg1, mask_reg0, mask_reg1, cs;
prep_chip_selects(pvt);
- if (pvt->umc)
- return read_umc_base_mask(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;
+ }
for_each_chip_select(cs, 0, pvt) {
- int reg0 = DCSB0 + (cs * 4);
- int reg1 = DCSB1 + (cs * 4);
+ int reg0 = base_reg0 + (cs * 4);
+ int reg1 = base_reg1 + (cs * 4);
u32 *base0 = &pvt->csels[0].csbases[cs];
u32 *base1 = &pvt->csels[1].csbases[cs];
- 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->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 (pvt->fam == 0xf)
- continue;
+ 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 (!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 = DCSM0 + (cs * 4);
- int reg1 = DCSM1 + (cs * 4);
+ int reg0 = mask_reg0 + (cs * 4);
+ int reg1 = mask_reg1 + (cs * 4);
u32 *mask0 = &pvt->csels[0].csmasks[cs];
u32 *mask1 = &pvt->csels[1].csmasks[cs];
- 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->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 (pvt->fam == 0xf)
- continue;
+ 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, 1, reg0, mask1))
- edac_dbg(0, " DCSM1[%d]=0x%08x reg: F2x%x\n",
- cs, *mask1, (pvt->fam == 0x10) ? reg1
- : reg0);
+ 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);
+ }
}
}
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 4dce6a2ac75f..8f66472f7adc 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -96,7 +96,6 @@
/* 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
@@ -352,8 +351,8 @@ 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/UMC */
- struct chip_select csels[NUM_CONTROLLERS];
+ /* one for each DCT */
+ struct chip_select csels[2];
/* DRAM base and limit pairs F1x[78,70,68,60,58,50,48,40] */
struct dram_range ranges[DRAM_RANGES];
--
2.21.0
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