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EDAC/amd64: Support more than two controllers for chip selects handling

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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.

Fix number of DIMMs and Chip Select bases/masks on Family17h, because
AMD Family 17h systems support 2 DIMMs, 4 CS bases, and 2 CS masks per
channel.

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@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/20190821235938.118710-2-Yazen.Ghannam@amd.com
This commit is contained in:
Yazen Ghannam 2019-08-21 23:59:55 +00:00 committed by Borislav Petkov
parent 718d58514e
commit d971e28e2c
2 changed files with 71 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

123
drivers/edac/amd64_edac.c
View File

@ -810,7 +810,7 @@ static void debug_display_dimm_sizes_df(struct amd64_pvt *pvt, u8 ctrl)
edac_printk(KERN_DEBUG, EDAC_MC, "UMC%d chip selects:\n", ctrl);
for (dimm = 0; dimm < 4; dimm++) {
for (dimm = 0; dimm < 2; dimm++) {
size0 = 0;
cs0 = dimm * 2;
@ -942,89 +942,102 @@ 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 = 4;
pvt->csels[umc].m_cnt = 2;
}
} 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)
{
u32 umc_base_reg, umc_mask_reg;
u32 base_reg, mask_reg;
u32 *base, *mask;
int cs, umc;
for_each_umc(umc) {
umc_base_reg = get_umc_base(umc) + UMCCH_BASE_ADDR;
for_each_chip_select(cs, umc, pvt) {
base = &pvt->csels[umc].csbases[cs];
base_reg = umc_base_reg + (cs * 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);
}
umc_mask_reg = get_umc_base(umc) + UMCCH_ADDR_MASK;
for_each_chip_select_mask(cs, umc, pvt) {
mask = &pvt->csels[umc].csmasks[cs];
mask_reg = umc_mask_reg + (cs * 4);
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 (!amd64_read_dct_pci_cfg(pvt, 0, reg0, mask0))
edac_dbg(0, " DCSM0[%d]=0x%08x reg: F2x%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 (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);
}
}

5
drivers/edac/amd64_edac.h
View File

@ -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
@ -351,8 +352,8 @@ 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];