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amd64_edac: Sanitize syndrome extraction 

Remove the two syndrome extraction macros and add a single function
which does the same thing but with proper typechecking. While at it,
make sure to cache ECC syndrome size and dump it in debug output.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Borislav Petkov 2010-03-09 12:46:00 +01:00
parent 9fe6206f40
commit ad6a32e969
2 changed files with 54 additions and 32 deletions
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81
drivers/edac/amd64_edac.c
View File

@ -796,6 +796,11 @@ static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
static u16 extract_syndrome(struct err_regs *err)
{
return ((err->nbsh >> 15) & 0xff) | ((err->nbsl >> 16) & 0xff00);
}
static void amd64_cpu_display_info(struct amd64_pvt *pvt)
{
if (boot_cpu_data.x86 == 0x11)
@ -888,6 +893,9 @@ static void amd64_dump_misc_regs(struct amd64_pvt *pvt)
return;
}
amd64_printk(KERN_INFO, "using %s syndromes.\n",
((pvt->syn_type == 8) ? "x8" : "x4"));
/* Only if NOT ganged does dclr1 have valid info */
if (!dct_ganging_enabled(pvt))
amd64_dump_dramcfg_low(pvt->dclr1, 1);
@ -1101,20 +1109,17 @@ static void k8_read_dram_base_limit(struct amd64_pvt *pvt, int dram)
}
static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct err_regs *info,
u64 sys_addr)
struct err_regs *err_info, u64 sys_addr)
{
struct mem_ctl_info *src_mci;
unsigned short syndrome;
int channel, csrow;
u32 page, offset;
u16 syndrome;
/* Extract the syndrome parts and form a 16-bit syndrome */
syndrome = HIGH_SYNDROME(info->nbsl) << 8;
syndrome |= LOW_SYNDROME(info->nbsh);
syndrome = extract_syndrome(err_info);
/* CHIPKILL enabled */
if (info->nbcfg & K8_NBCFG_CHIPKILL) {
if (err_info->nbcfg & K8_NBCFG_CHIPKILL) {
channel = get_channel_from_ecc_syndrome(mci, syndrome);
if (channel < 0) {
/*
@ -1123,8 +1128,8 @@ static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
* as suspect.
*/
amd64_mc_printk(mci, KERN_WARNING,
"unknown syndrome 0x%x - possible error "
"reporting race\n", syndrome);
"unknown syndrome 0x%04x - possible "
"error reporting race\n", syndrome);
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
@ -1654,13 +1659,13 @@ static int f10_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
* (MCX_ADDR).
*/
static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct err_regs *info,
struct err_regs *err_info,
u64 sys_addr)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 page, offset;
unsigned short syndrome;
int nid, csrow, chan = 0;
u16 syndrome;
csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
@ -1671,8 +1676,7 @@ static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
error_address_to_page_and_offset(sys_addr, &page, &offset);
syndrome = HIGH_SYNDROME(info->nbsl) << 8;
syndrome |= LOW_SYNDROME(info->nbsh);
syndrome = extract_syndrome(err_info);
/*
* We need the syndromes for channel detection only when we're
@ -1878,7 +1882,7 @@ static u16 x8_vectors[] = {
};
static int decode_syndrome(u16 syndrome, u16 *vectors, int num_vecs,
int v_dim)
int v_dim)
{
unsigned int i, err_sym;
@ -1955,23 +1959,23 @@ static int map_err_sym_to_channel(int err_sym, int sym_size)
static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 value = 0;
int err_sym = 0;
int err_sym = -1;
if (boot_cpu_data.x86 == 0x10) {
amd64_read_pci_cfg(pvt->misc_f3_ctl, 0x180, &value);
/* F3x180[EccSymbolSize]=1 => x8 symbols */
if (boot_cpu_data.x86_model > 7 &&
value & BIT(25)) {
err_sym = decode_syndrome(syndrome, x8_vectors,
ARRAY_SIZE(x8_vectors), 8);
return map_err_sym_to_channel(err_sym, 8);
}
if (pvt->syn_type == 8)
err_sym = decode_syndrome(syndrome, x8_vectors,
ARRAY_SIZE(x8_vectors),
pvt->syn_type);
else if (pvt->syn_type == 4)
err_sym = decode_syndrome(syndrome, x4_vectors,
ARRAY_SIZE(x4_vectors),
pvt->syn_type);
else {
amd64_printk(KERN_WARNING, "%s: Illegal syndrome type: %u\n",
__func__, pvt->syn_type);
return err_sym;
}
err_sym = decode_syndrome(syndrome, x4_vectors, ARRAY_SIZE(x4_vectors), 4);
return map_err_sym_to_channel(err_sym, 4);
return map_err_sym_to_channel(err_sym, pvt->syn_type);
}
/*
@ -2284,6 +2288,7 @@ static void amd64_free_mc_sibling_devices(struct amd64_pvt *pvt)
static void amd64_read_mc_registers(struct amd64_pvt *pvt)
{
u64 msr_val;
u32 tmp;
int dram;
/*
@ -2349,10 +2354,22 @@ static void amd64_read_mc_registers(struct amd64_pvt *pvt)
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0);
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCHR_0, &pvt->dchr0);
if (!dct_ganging_enabled(pvt) && boot_cpu_data.x86 >= 0x10) {
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1);
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCHR_1, &pvt->dchr1);
if (boot_cpu_data.x86 >= 0x10) {
if (!dct_ganging_enabled(pvt)) {
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1);
amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCHR_1, &pvt->dchr1);
}
amd64_read_pci_cfg(pvt->misc_f3_ctl, EXT_NB_MCA_CFG, &tmp);
}
if (boot_cpu_data.x86 == 0x10 &&
boot_cpu_data.x86_model > 7 &&
/* F3x180[EccSymbolSize]=1 => x8 symbols */
tmp & BIT(25))
pvt->syn_type = 8;
else
pvt->syn_type = 4;
amd64_dump_misc_regs(pvt);
}

5
drivers/edac/amd64_edac.h
View File

@ -382,6 +382,8 @@ enum {
#define K8_NBCAP_SECDED BIT(3)
#define K8_NBCAP_DCT_DUAL BIT(0)
#define EXT_NB_MCA_CFG 0x180
/* MSRs */
#define K8_MSR_MCGCTL_NBE BIT(4)
@ -471,6 +473,9 @@ struct amd64_pvt {
u32 dram_ctl_select_high; /* DRAM Controller Select High Reg */
u32 online_spare; /* On-Line spare Reg */
/* x4 or x8 syndromes in use */
u8 syn_type;
/* temp storage for when input is received from sysfs */
struct err_regs ctl_error_info;