diff options
author | Borislav Petkov <borislav.petkov@amd.com> | 2009-10-13 17:26:55 (GMT) |
---|---|---|
committer | Borislav Petkov <borislav.petkov@amd.com> | 2009-12-07 18:14:27 (GMT) |
commit | 6ba5dcdc44624677bba0bef1dcb93a524f88f8c1 (patch) | |
tree | aa2aa4c95882b4451c2bf99c5228d81dd76e641d /drivers | |
parent | f6d6ae965760906d79ab29bc38507608c5971549 (diff) | |
download | linux-fsl-qoriq-6ba5dcdc44624677bba0bef1dcb93a524f88f8c1.tar.xz |
amd64_edac: wrap-up pci config read error handling
Add a pci config read wrapper for signaling pci config space access
errors instead of them being visible only on a debug build. This is
important on amd64_edac since it uses all those pci config register
values to access the DRAM/DIMM configuration of the nodes.
In addition, the wrapper makes a _lot_ (look at the diffstat!) of
error handling code superfluous and improves much of the overall code
readability by removing error handling details out of the way.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/edac/amd64_edac.c | 213 | ||||
-rw-r--r-- | drivers/edac/amd64_edac.h | 16 |
2 files changed, 70 insertions, 159 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 70c7d5f..3e5ece6 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -164,11 +164,9 @@ static int amd64_get_scrub_rate(struct mem_ctl_info *mci, u32 *bw) { struct amd64_pvt *pvt = mci->pvt_info; u32 scrubval = 0; - int status = -1, i, ret = 0; + int status = -1, i; - ret = pci_read_config_dword(pvt->misc_f3_ctl, K8_SCRCTRL, &scrubval); - if (ret) - debugf0("Reading K8_SCRCTRL failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_SCRCTRL, &scrubval); scrubval = scrubval & 0x001F; @@ -909,26 +907,10 @@ static void amd64_dump_misc_regs(struct amd64_pvt *pvt) /* Read in both of DBAM registers */ static void amd64_read_dbam_reg(struct amd64_pvt *pvt) { - int err = 0; - unsigned int reg; + amd64_read_pci_cfg(pvt->dram_f2_ctl, DBAM0, &pvt->dbam0); - reg = DBAM0; - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam0); - if (err) - goto err_reg; - - if (boot_cpu_data.x86 >= 0x10) { - reg = DBAM1; - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam1); - - if (err) - goto err_reg; - } - - return; - -err_reg: - debugf0("Error reading F2x%03x.\n", reg); + if (boot_cpu_data.x86 >= 0x10) + amd64_read_pci_cfg(pvt->dram_f2_ctl, DBAM1, &pvt->dbam1); } /* @@ -991,28 +973,21 @@ static void amd64_set_dct_base_and_mask(struct amd64_pvt *pvt) */ static void amd64_read_dct_base_mask(struct amd64_pvt *pvt) { - int cs, reg, err = 0; + int cs, reg; amd64_set_dct_base_and_mask(pvt); for (cs = 0; cs < pvt->cs_count; cs++) { reg = K8_DCSB0 + (cs * 4); - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, - &pvt->dcsb0[cs]); - if (unlikely(err)) - debugf0("Reading K8_DCSB0[%d] failed\n", cs); - else + if (!amd64_read_pci_cfg(pvt->dram_f2_ctl, reg, &pvt->dcsb0[cs])) debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n", cs, pvt->dcsb0[cs], reg); /* If DCT are NOT ganged, then read in DCT1's base */ if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) { reg = F10_DCSB1 + (cs * 4); - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, - &pvt->dcsb1[cs]); - if (unlikely(err)) - debugf0("Reading F10_DCSB1[%d] failed\n", cs); - else + if (!amd64_read_pci_cfg(pvt->dram_f2_ctl, reg, + &pvt->dcsb1[cs])) debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n", cs, pvt->dcsb1[cs], reg); } else { @@ -1022,26 +997,20 @@ static void amd64_read_dct_base_mask(struct amd64_pvt *pvt) for (cs = 0; cs < pvt->num_dcsm; cs++) { reg = K8_DCSM0 + (cs * 4); - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, - &pvt->dcsm0[cs]); - if (unlikely(err)) - debugf0("Reading K8_DCSM0 failed\n"); - else + if (!amd64_read_pci_cfg(pvt->dram_f2_ctl, reg, &pvt->dcsm0[cs])) debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n", cs, pvt->dcsm0[cs], reg); /* If DCT are NOT ganged, then read in DCT1's mask */ if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) { reg = F10_DCSM1 + (cs * 4); - err = pci_read_config_dword(pvt->dram_f2_ctl, reg, - &pvt->dcsm1[cs]); - if (unlikely(err)) - debugf0("Reading F10_DCSM1[%d] failed\n", cs); - else + if (!amd64_read_pci_cfg(pvt->dram_f2_ctl, reg, + &pvt->dcsm1[cs])) debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n", cs, pvt->dcsm1[cs], reg); - } else + } else { pvt->dcsm1[cs] = 0; + } } } @@ -1078,7 +1047,7 @@ static int k8_early_channel_count(struct amd64_pvt *pvt) { int flag, err = 0; - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); + err = amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); if (err) return err; @@ -1114,22 +1083,15 @@ static void k8_read_dram_base_limit(struct amd64_pvt *pvt, int dram) { u32 low; u32 off = dram << 3; /* 8 bytes between DRAM entries */ - int err; - err = pci_read_config_dword(pvt->addr_f1_ctl, - K8_DRAM_BASE_LOW + off, &low); - if (err) - debugf0("Reading K8_DRAM_BASE_LOW failed\n"); + amd64_read_pci_cfg(pvt->addr_f1_ctl, K8_DRAM_BASE_LOW + off, &low); /* Extract parts into separate data entries */ pvt->dram_base[dram] = ((u64) low & 0xFFFF0000) << 8; pvt->dram_IntlvEn[dram] = (low >> 8) & 0x7; pvt->dram_rw_en[dram] = (low & 0x3); - err = pci_read_config_dword(pvt->addr_f1_ctl, - K8_DRAM_LIMIT_LOW + off, &low); - if (err) - debugf0("Reading K8_DRAM_LIMIT_LOW failed\n"); + amd64_read_pci_cfg(pvt->addr_f1_ctl, K8_DRAM_LIMIT_LOW + off, &low); /* * Extract parts into separate data entries. Limit is the HIGHEST memory @@ -1248,16 +1210,13 @@ static int k8_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map) static int f10_early_channel_count(struct amd64_pvt *pvt) { int dbams[] = { DBAM0, DBAM1 }; - int err = 0, channels = 0; - int i, j; + int i, j, channels = 0; u32 dbam; - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); - if (err) + if (amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0)) goto err_reg; - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1); - if (err) + if (amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1)) goto err_reg; /* If we are in 128 bit mode, then we are using 2 channels */ @@ -1283,8 +1242,7 @@ static int f10_early_channel_count(struct amd64_pvt *pvt) * both controllers since DIMMs can be placed in either one. */ for (i = 0; i < ARRAY_SIZE(dbams); i++) { - err = pci_read_config_dword(pvt->dram_f2_ctl, dbams[i], &dbam); - if (err) + if (amd64_read_pci_cfg(pvt->dram_f2_ctl, dbams[i], &dbam)) goto err_reg; for (j = 0; j < 4; j++) { @@ -1314,7 +1272,7 @@ static void amd64_setup(struct amd64_pvt *pvt) { u32 reg; - pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); + amd64_read_pci_cfg(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); pvt->flags.cf8_extcfg = !!(reg & F10_NB_CFG_LOW_ENABLE_EXT_CFG); reg |= F10_NB_CFG_LOW_ENABLE_EXT_CFG; @@ -1326,7 +1284,7 @@ static void amd64_teardown(struct amd64_pvt *pvt) { u32 reg; - pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); + amd64_read_pci_cfg(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, ®); reg &= ~F10_NB_CFG_LOW_ENABLE_EXT_CFG; if (pvt->flags.cf8_extcfg) @@ -1355,10 +1313,10 @@ static void f10_read_dram_base_limit(struct amd64_pvt *pvt, int dram) high_offset = F10_DRAM_BASE_HIGH + (dram << 3); /* read the 'raw' DRAM BASE Address register */ - pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_base); + amd64_read_pci_cfg(pvt->addr_f1_ctl, low_offset, &low_base); /* Read from the ECS data register */ - pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_base); + amd64_read_pci_cfg(pvt->addr_f1_ctl, high_offset, &high_base); /* Extract parts into separate data entries */ pvt->dram_rw_en[dram] = (low_base & 0x3); @@ -1375,10 +1333,10 @@ static void f10_read_dram_base_limit(struct amd64_pvt *pvt, int dram) high_offset = F10_DRAM_LIMIT_HIGH + (dram << 3); /* read the 'raw' LIMIT registers */ - pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_limit); + amd64_read_pci_cfg(pvt->addr_f1_ctl, low_offset, &low_limit); /* Read from the ECS data register for the HIGH portion */ - pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_limit); + amd64_read_pci_cfg(pvt->addr_f1_ctl, high_offset, &high_limit); debugf0(" HW Regs: BASE=0x%08x-%08x LIMIT= 0x%08x-%08x\n", high_base, low_base, high_limit, low_limit); @@ -1397,13 +1355,9 @@ static void f10_read_dram_base_limit(struct amd64_pvt *pvt, int dram) static void f10_read_dram_ctl_register(struct amd64_pvt *pvt) { - int err = 0; - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_LOW, - &pvt->dram_ctl_select_low); - if (err) { - debugf0("Reading F2x110 (DCTL Sel. Low) failed\n"); - } else { + if (!amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCTL_SEL_LOW, + &pvt->dram_ctl_select_low)) { debugf0("F2x110 (DCTL Sel. Low): 0x%08x, " "High range addresses at: 0x%x\n", pvt->dram_ctl_select_low, @@ -1428,10 +1382,8 @@ static void f10_read_dram_ctl_register(struct amd64_pvt *pvt) dct_sel_interleave_addr(pvt)); } - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_HIGH, - &pvt->dram_ctl_select_high); - if (err) - debugf0("Reading F2x114 (DCT Sel. High) failed\n"); + amd64_read_pci_cfg(pvt->dram_f2_ctl, F10_DCTL_SEL_HIGH, + &pvt->dram_ctl_select_high); } /* @@ -2082,40 +2034,24 @@ static int amd64_get_error_info_regs(struct mem_ctl_info *mci, { struct amd64_pvt *pvt; struct pci_dev *misc_f3_ctl; - int err = 0; pvt = mci->pvt_info; misc_f3_ctl = pvt->misc_f3_ctl; - err = pci_read_config_dword(misc_f3_ctl, K8_NBSH, ®s->nbsh); - if (err) - goto err_reg; + if (amd64_read_pci_cfg(misc_f3_ctl, K8_NBSH, ®s->nbsh)) + return 0; if (!(regs->nbsh & K8_NBSH_VALID_BIT)) return 0; /* valid error, read remaining error information registers */ - err = pci_read_config_dword(misc_f3_ctl, K8_NBSL, ®s->nbsl); - if (err) - goto err_reg; - - err = pci_read_config_dword(misc_f3_ctl, K8_NBEAL, ®s->nbeal); - if (err) - goto err_reg; - - err = pci_read_config_dword(misc_f3_ctl, K8_NBEAH, ®s->nbeah); - if (err) - goto err_reg; - - err = pci_read_config_dword(misc_f3_ctl, K8_NBCFG, ®s->nbcfg); - if (err) - goto err_reg; + if (amd64_read_pci_cfg(misc_f3_ctl, K8_NBSL, ®s->nbsl) || + amd64_read_pci_cfg(misc_f3_ctl, K8_NBEAL, ®s->nbeal) || + amd64_read_pci_cfg(misc_f3_ctl, K8_NBEAH, ®s->nbeah) || + amd64_read_pci_cfg(misc_f3_ctl, K8_NBCFG, ®s->nbcfg)) + return 0; return 1; - -err_reg: - debugf0("Reading error info register failed\n"); - return 0; } /* @@ -2393,7 +2329,7 @@ static void amd64_free_mc_sibling_devices(struct amd64_pvt *pvt) static void amd64_read_mc_registers(struct amd64_pvt *pvt) { u64 msr_val; - int dram, err = 0; + int dram; /* * Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since @@ -2412,9 +2348,7 @@ static void amd64_read_mc_registers(struct amd64_pvt *pvt) amd64_cpu_display_info(pvt); - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCAP, &pvt->nbcap); - if (err) - goto err_reg; + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCAP, &pvt->nbcap); if (pvt->ops->read_dram_ctl_register) pvt->ops->read_dram_ctl_register(pvt); @@ -2451,44 +2385,20 @@ static void amd64_read_mc_registers(struct amd64_pvt *pvt) amd64_read_dct_base_mask(pvt); - err = pci_read_config_dword(pvt->addr_f1_ctl, K8_DHAR, &pvt->dhar); - if (err) - goto err_reg; - + amd64_read_pci_cfg(pvt->addr_f1_ctl, K8_DHAR, &pvt->dhar); amd64_read_dbam_reg(pvt); - err = pci_read_config_dword(pvt->misc_f3_ctl, - F10_ONLINE_SPARE, &pvt->online_spare); - if (err) - goto err_reg; + amd64_read_pci_cfg(pvt->misc_f3_ctl, + F10_ONLINE_SPARE, &pvt->online_spare); - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); - if (err) - goto err_reg; - - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCHR_0, &pvt->dchr0); - if (err) - goto err_reg; + 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)) { - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_1, - &pvt->dclr1); - if (err) - goto err_reg; - - err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCHR_1, - &pvt->dchr1); - if (err) - goto err_reg; + 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_dump_misc_regs(pvt); - - return; - -err_reg: - debugf0("Reading an MC register failed\n"); - } /* @@ -2562,13 +2472,11 @@ static int amd64_init_csrows(struct mem_ctl_info *mci) struct csrow_info *csrow; struct amd64_pvt *pvt; u64 input_addr_min, input_addr_max, sys_addr; - int i, err = 0, empty = 1; + int i, empty = 1; pvt = mci->pvt_info; - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &pvt->nbcfg); - if (err) - debugf0("Reading K8_NBCFG failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCFG, &pvt->nbcfg); debugf0("NBCFG= 0x%x CHIPKILL= %s DRAM ECC= %s\n", pvt->nbcfg, (pvt->nbcfg & K8_NBCFG_CHIPKILL) ? "Enabled" : "Disabled", @@ -2734,7 +2642,6 @@ static int amd64_toggle_ecc_err_reporting(struct amd64_pvt *pvt, bool on) static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) { struct amd64_pvt *pvt = mci->pvt_info; - int err = 0; u32 value, mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn; if (!ecc_enable_override) @@ -2744,9 +2651,7 @@ static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) "'ecc_enable_override' parameter is active, " "Enabling AMD ECC hardware now: CAUTION\n"); - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCTL, &value); - if (err) - debugf0("Reading K8_NBCTL failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCTL, &value); /* turn on UECCn and CECCEn bits */ pvt->old_nbctl = value & mask; @@ -2759,9 +2664,7 @@ static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) amd64_printk(KERN_WARNING, "Error enabling ECC reporting over " "MCGCTL!\n"); - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); - if (err) - debugf0("Reading K8_NBCFG failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCFG, &value); debugf0("NBCFG(1)= 0x%x CHIPKILL= %s ECC_ENABLE= %s\n", value, (value & K8_NBCFG_CHIPKILL) ? "Enabled" : "Disabled", @@ -2776,9 +2679,7 @@ static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) value |= K8_NBCFG_ECC_ENABLE; pci_write_config_dword(pvt->misc_f3_ctl, K8_NBCFG, value); - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); - if (err) - debugf0("Reading K8_NBCFG failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCFG, &value); if (!(value & K8_NBCFG_ECC_ENABLE)) { amd64_printk(KERN_WARNING, @@ -2798,15 +2699,12 @@ static void amd64_enable_ecc_error_reporting(struct mem_ctl_info *mci) static void amd64_restore_ecc_error_reporting(struct amd64_pvt *pvt) { - int err = 0; u32 value, mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn; if (!pvt->nbctl_mcgctl_saved) return; - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCTL, &value); - if (err) - debugf0("Reading K8_NBCTL failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCTL, &value); value &= ~mask; value |= pvt->old_nbctl; @@ -2832,13 +2730,10 @@ static const char *ecc_warning = static int amd64_check_ecc_enabled(struct amd64_pvt *pvt) { u32 value; - int err = 0; u8 ecc_enabled = 0; bool nb_mce_en = false; - err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value); - if (err) - debugf0("Reading K8_NBCTL failed\n"); + amd64_read_pci_cfg(pvt->misc_f3_ctl, K8_NBCFG, &value); ecc_enabled = !!(value & K8_NBCFG_ECC_ENABLE); if (!ecc_enabled) diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h index bba6c94..16f2df4 100644 --- a/drivers/edac/amd64_edac.h +++ b/drivers/edac/amd64_edac.h @@ -565,6 +565,22 @@ static inline struct low_ops *family_ops(int index) return &amd64_family_types[index].ops; } +static inline int amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset, + u32 *val, const char *func) +{ + int err = 0; + + err = pci_read_config_dword(pdev, offset, val); + if (err) + amd64_printk(KERN_WARNING, "%s: error reading F%dx%x.\n", + func, PCI_FUNC(pdev->devfn), offset); + + return err; +} + +#define amd64_read_pci_cfg(pdev, offset, val) \ + amd64_read_pci_cfg_dword(pdev, offset, val, __func__) + /* * For future CPU versions, verify the following as new 'slow' rates appear and * modify the necessary skip values for the supported CPU. |