diff options
Diffstat (limited to 'drivers/edac/e752x_edac.c')
| -rw-r--r-- | drivers/edac/e752x_edac.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c index 4fbc5892bc2..12e7677b834 100644 --- a/drivers/edac/e752x_edac.c +++ b/drivers/edac/e752x_edac.c @@ -29,6 +29,7 @@ #define EDAC_MOD_STR "e752x_edac" static int force_function_unhide; +static int sysbus_parity = -1; static struct edac_pci_ctl_info *e752x_pci; @@ -1049,6 +1050,37 @@ fail: return 1; } +/* Setup system bus parity mask register. + * Sysbus parity supported on: + * e7320/e7520/e7525 + Xeon + * i3100 + Xeon/Celeron + * Sysbus parity not supported on: + * i3100 + Pentium M/Celeron M/Core Duo/Core2 Duo + */ +static void e752x_init_sysbus_parity_mask(struct e752x_pvt *pvt) +{ + char *cpu_id = cpu_data(0).x86_model_id; + struct pci_dev *dev = pvt->dev_d0f1; + int enable = 1; + + /* Allow module paramter override, else see if CPU supports parity */ + if (sysbus_parity != -1) { + enable = sysbus_parity; + } else if (cpu_id[0] && + ((strstr(cpu_id, "Pentium") && strstr(cpu_id, " M ")) || + (strstr(cpu_id, "Celeron") && strstr(cpu_id, " M ")) || + (strstr(cpu_id, "Core") && strstr(cpu_id, "Duo")))) { + e752x_printk(KERN_INFO, "System Bus Parity not " + "supported by CPU, disabling\n"); + enable = 0; + } + + if (enable) + pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0000); + else + pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0309); +} + static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt) { struct pci_dev *dev; @@ -1062,7 +1094,9 @@ static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt) pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00); pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00); } - pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x00); + + e752x_init_sysbus_parity_mask(pvt); + pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00); pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00); pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00); @@ -1291,3 +1325,7 @@ MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:" " 1=force unhide and hope BIOS doesn't fight driver for Dev0:Fun1 access"); module_param(edac_op_state, int, 0444); MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); + +module_param(sysbus_parity, int, 0444); +MODULE_PARM_DESC(sysbus_parity, "0=disable system bus parity checking," + " 1=enable system bus parity checking, default=auto-detect"); |