/* * amd8111_edac.c, AMD8111 Hyper Transport chip EDAC kernel module * * Copyright (c) 2008 Wind River Systems, Inc. * * Authors: Cao Qingtao <qingtao.cao@windriver.com> * Benjamin Walsh <benjamin.walsh@windriver.com> * Hu Yongqi <yongqi.hu@windriver.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/bitops.h> #include <linux/edac.h> #include <linux/pci_ids.h> #include <asm/io.h> #include "edac_core.h" #include "edac_module.h" #include "amd8111_edac.h" #define AMD8111_EDAC_REVISION " Ver: 1.0.0 " __DATE__ #define AMD8111_EDAC_MOD_STR "amd8111_edac" #define PCI_DEVICE_ID_AMD_8111_PCI 0x7460 enum amd8111_edac_devs { LPC_BRIDGE = 0, }; enum amd8111_edac_pcis { PCI_BRIDGE = 0, }; /* Wrapper functions for accessing PCI configuration space */ static int edac_pci_read_dword(struct pci_dev *dev, int reg, u32 *val32) { int ret; ret = pci_read_config_dword(dev, reg, val32); if (ret != 0) printk(KERN_ERR AMD8111_EDAC_MOD_STR " PCI Access Read Error at 0x%x\n", reg); return ret; } static void edac_pci_read_byte(struct pci_dev *dev, int reg, u8 *val8) { int ret; ret = pci_read_config_byte(dev, reg, val8); if (ret != 0) printk(KERN_ERR AMD8111_EDAC_MOD_STR " PCI Access Read Error at 0x%x\n", reg); } static void edac_pci_write_dword(struct pci_dev *dev, int reg, u32 val32) { int ret; ret = pci_write_config_dword(dev, reg, val32); if (ret != 0) printk(KERN_ERR AMD8111_EDAC_MOD_STR " PCI Access Write Error at 0x%x\n", reg); } static void edac_pci_write_byte(struct pci_dev *dev, int reg, u8 val8) { int ret; ret = pci_write_config_byte(dev, reg, val8); if (ret != 0) printk(KERN_ERR AMD8111_EDAC_MOD_STR " PCI Access Write Error at 0x%x\n", reg); } /* * device-specific methods for amd8111 PCI Bridge Controller * * Error Reporting and Handling for amd8111 chipset could be found * in its datasheet 3.1.2 section, P37 */ static void amd8111_pci_bridge_init(struct amd8111_pci_info *pci_info) { u32 val32; struct pci_dev *dev = pci_info->dev; /* First clear error detection flags on the host interface */ /* Clear SSE/SMA/STA flags in the global status register*/ edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32); if (val32 & PCI_STSCMD_CLEAR_MASK) edac_pci_write_dword(dev, REG_PCI_STSCMD, val32); /* Clear CRC and Link Fail flags in HT Link Control reg */ edac_pci_read_dword(dev, REG_HT_LINK, &val32); if (val32 & HT_LINK_CLEAR_MASK) edac_pci_write_dword(dev, REG_HT_LINK, val32); /* Second clear all fault on the secondary interface */ /* Clear error flags in the memory-base limit reg. */ edac_pci_read_dword(dev, REG_MEM_LIM, &val32); if (val32 & MEM_LIMIT_CLEAR_MASK) edac_pci_write_dword(dev, REG_MEM_LIM, val32); /* Clear Discard Timer Expired flag in Interrupt/Bridge Control reg */ edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32); if (val32 & PCI_INTBRG_CTRL_CLEAR_MASK) edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32); /* Last enable error detections */ if (edac_op_state == EDAC_OPSTATE_POLL) { /* Enable System Error reporting in global status register */ edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32); val32 |= PCI_STSCMD_SERREN; edac_pci_write_dword(dev, REG_PCI_STSCMD, val32); /* Enable CRC Sync flood packets to HyperTransport Link */ edac_pci_read_dword(dev, REG_HT_LINK, &val32); val32 |= HT_LINK_CRCFEN; edac_pci_write_dword(dev, REG_HT_LINK, val32); /* Enable SSE reporting etc in Interrupt control reg */ edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32); val32 |= PCI_INTBRG_CTRL_POLL_MASK; edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32); } } static void amd8111_pci_bridge_exit(struct amd8111_pci_info *pci_info) { u32 val32; struct pci_dev *dev = pci_info->dev; if (edac_op_state == EDAC_OPSTATE_POLL) { /* Disable System Error reporting */ edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32); val32 &= ~PCI_STSCMD_SERREN; edac_pci_write_dword(dev, REG_PCI_STSCMD, val32); /* Disable CRC flood packets */ edac_pci_read_dword(dev, REG_HT_LINK, &val32); val32 &= ~HT_LINK_CRCFEN; edac_pci_write_dword(dev, REG_HT_LINK, val32); /* Disable DTSERREN/MARSP/SERREN in Interrupt Control reg */ edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32); val32 &= ~PCI_INTBRG_CTRL_POLL_MASK; edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32); } } static void amd8111_pci_bridge_check(struct edac_pci_ctl_info *edac_dev) { struct amd8111_pci_info *pci_info = edac_dev->pvt_info; struct pci_dev *dev = pci_info->dev; u32 val32; /* Check out PCI Bridge Status and Command Register */ edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32); if (val32 & PCI_STSCMD_CLEAR_MASK) { printk(KERN_INFO "Error(s) in PCI bridge status and command" "register on device %s\n", pci_info->ctl_name); printk(KERN_INFO "SSE: %d, RMA: %d, RTA: %d\n", (val32 & PCI_STSCMD_SSE) != 0, (val32 & PCI_STSCMD_RMA) != 0, (val32 & PCI_STSCMD_RTA) != 0); val32 |= PCI_STSCMD_CLEAR_MASK; edac_pci_write_dword(dev, REG_PCI_STSCMD, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check out HyperTransport Link Control Register */ edac_pci_read_dword(dev, REG_HT_LINK, &val32); if (val32 & HT_LINK_LKFAIL) { printk(KERN_INFO "Error(s) in hypertransport link control" "register on device %s\n", pci_info->ctl_name); printk(KERN_INFO "LKFAIL: %d\n", (val32 & HT_LINK_LKFAIL) != 0); val32 |= HT_LINK_LKFAIL; edac_pci_write_dword(dev, REG_HT_LINK, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check out PCI Interrupt and Bridge Control Register */ edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32); if (val32 & PCI_INTBRG_CTRL_DTSTAT) { printk(KERN_INFO "Error(s) in PCI interrupt and bridge control" "register on device %s\n", pci_info->ctl_name); printk(KERN_INFO "DTSTAT: %d\n", (val32 & PCI_INTBRG_CTRL_DTSTAT) != 0); val32 |= PCI_INTBRG_CTRL_DTSTAT; edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check out PCI Bridge Memory Base-Limit Register */ edac_pci_read_dword(dev, REG_MEM_LIM, &val32); if (val32 & MEM_LIMIT_CLEAR_MASK) { printk(KERN_INFO "Error(s) in mem limit register on %s device\n", pci_info->ctl_name); printk(KERN_INFO "DPE: %d, RSE: %d, RMA: %d\n" "RTA: %d, STA: %d, MDPE: %d\n", (val32 & MEM_LIMIT_DPE) != 0, (val32 & MEM_LIMIT_RSE) != 0, (val32 & MEM_LIMIT_RMA) != 0, (val32 & MEM_LIMIT_RTA) != 0, (val32 & MEM_LIMIT_STA) != 0, (val32 & MEM_LIMIT_MDPE) != 0); val32 |= MEM_LIMIT_CLEAR_MASK; edac_pci_write_dword(dev, REG_MEM_LIM, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } } static struct resource *legacy_io_res; static int at_compat_reg_broken; #define LEGACY_NR_PORTS 1 /* device-specific methods for amd8111 LPC Bridge device */ static void amd8111_lpc_bridge_init(struct amd8111_dev_info *dev_info) { u8 val8; struct pci_dev *dev = dev_info->dev; /* First clear REG_AT_COMPAT[SERR, IOCHK] if necessary */ legacy_io_res = request_region(REG_AT_COMPAT, LEGACY_NR_PORTS, AMD8111_EDAC_MOD_STR); if (!legacy_io_res) printk(KERN_INFO "%s: failed to request legacy I/O region " "start %d, len %d\n", __func__, REG_AT_COMPAT, LEGACY_NR_PORTS); else { val8 = __do_inb(REG_AT_COMPAT); if (val8 == 0xff) { /* buggy port */ printk(KERN_INFO "%s: port %d is buggy, not supported" " by hardware?\n", __func__, REG_AT_COMPAT); at_compat_reg_broken = 1; release_region(REG_AT_COMPAT, LEGACY_NR_PORTS); legacy_io_res = NULL; } else { u8 out8 = 0; if (val8 & AT_COMPAT_SERR) out8 = AT_COMPAT_CLRSERR; if (val8 & AT_COMPAT_IOCHK) out8 |= AT_COMPAT_CLRIOCHK; if (out8 > 0) __do_outb(out8, REG_AT_COMPAT); } } /* Second clear error flags on LPC bridge */ edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8); if (val8 & IO_CTRL_1_CLEAR_MASK) edac_pci_write_byte(dev, REG_IO_CTRL_1, val8); } static void amd8111_lpc_bridge_exit(struct amd8111_dev_info *dev_info) { if (legacy_io_res) release_region(REG_AT_COMPAT, LEGACY_NR_PORTS); } static void amd8111_lpc_bridge_check(struct edac_device_ctl_info *edac_dev) { struct amd8111_dev_info *dev_info = edac_dev->pvt_info; struct pci_dev *dev = dev_info->dev; u8 val8; edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8); if (val8 & IO_CTRL_1_CLEAR_MASK) { printk(KERN_INFO "Error(s) in IO control register on %s device\n", dev_info->ctl_name); printk(KERN_INFO "LPC ERR: %d, PW2LPC: %d\n", (val8 & IO_CTRL_1_LPC_ERR) != 0, (val8 & IO_CTRL_1_PW2LPC) != 0); val8 |= IO_CTRL_1_CLEAR_MASK; edac_pci_write_byte(dev, REG_IO_CTRL_1, val8); edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name); } if (at_compat_reg_broken == 0) { u8 out8 = 0; val8 = __do_inb(REG_AT_COMPAT); if (val8 & AT_COMPAT_SERR) out8 = AT_COMPAT_CLRSERR; if (val8 & AT_COMPAT_IOCHK) out8 |= AT_COMPAT_CLRIOCHK; if (out8 > 0) { __do_outb(out8, REG_AT_COMPAT); edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name); } } } /* General devices represented by edac_device_ctl_info */ static struct amd8111_dev_info amd8111_devices[] = { [LPC_BRIDGE] = { .err_dev = PCI_DEVICE_ID_AMD_8111_LPC, .ctl_name = "lpc", .init = amd8111_lpc_bridge_init, .exit = amd8111_lpc_bridge_exit, .check = amd8111_lpc_bridge_check, }, {0}, }; /* PCI controllers represented by edac_pci_ctl_info */ static struct amd8111_pci_info amd8111_pcis[] = { [PCI_BRIDGE] = { .err_dev = PCI_DEVICE_ID_AMD_8111_PCI, .ctl_name = "AMD8111_PCI_Controller", .init = amd8111_pci_bridge_init, .exit = amd8111_pci_bridge_exit, .check = amd8111_pci_bridge_check, }, {0}, }; static int amd8111_dev_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct amd8111_dev_info *dev_info = &amd8111_devices[id->driver_data]; dev_info->dev = pci_get_device(PCI_VENDOR_ID_AMD, dev_info->err_dev, NULL); if (!dev_info->dev) { printk(KERN_ERR "EDAC device not found:" "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, dev_info->err_dev, dev_info->ctl_name); return -ENODEV; } if (pci_enable_device(dev_info->dev)) { pci_dev_put(dev_info->dev); printk(KERN_ERR "failed to enable:" "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, dev_info->err_dev, dev_info->ctl_name); return -ENODEV; } /* * we do not allocate extra private structure for * edac_device_ctl_info, but make use of existing * one instead. */ dev_info->edac_idx = edac_device_alloc_index(); dev_info->edac_dev = edac_device_alloc_ctl_info(0, dev_info->ctl_name, 1, NULL, 0, 0, NULL, 0, dev_info->edac_idx); if (!dev_info->edac_dev) return -ENOMEM; dev_info->edac_dev->pvt_info = dev_info; dev_info->edac_dev->dev = &dev_info->dev->dev; dev_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR; dev_info->edac_dev->ctl_name = dev_info->ctl_name; dev_info->edac_dev->dev_name = dev_name(&dev_info->dev->dev); if (edac_op_state == EDAC_OPSTATE_POLL) dev_info->edac_dev->edac_check = dev_info->check; if (dev_info->init) dev_info->init(dev_info); if (edac_device_add_device(dev_info->edac_dev) > 0) { printk(KERN_ERR "failed to add edac_dev for %s\n", dev_info->ctl_name); edac_device_free_ctl_info(dev_info->edac_dev); return -ENODEV; } printk(KERN_INFO "added one edac_dev on AMD8111 " "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, dev_info->err_dev, dev_info->ctl_name); return 0; } static void amd8111_dev_remove(struct pci_dev *dev) { struct amd8111_dev_info *dev_info; for (dev_info = amd8111_devices; dev_info->err_dev; dev_info++) if (dev_info->dev->device == dev->device) break; if (!dev_info->err_dev) /* should never happen */ return; if (dev_info->edac_dev) { edac_device_del_device(dev_info->edac_dev->dev); edac_device_free_ctl_info(dev_info->edac_dev); } if (dev_info->exit) dev_info->exit(dev_info); pci_dev_put(dev_info->dev); } static int amd8111_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct amd8111_pci_info *pci_info = &amd8111_pcis[id->driver_data]; pci_info->dev = pci_get_device(PCI_VENDOR_ID_AMD, pci_info->err_dev, NULL); if (!pci_info->dev) { printk(KERN_ERR "EDAC device not found:" "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, pci_info->err_dev, pci_info->ctl_name); return -ENODEV; } if (pci_enable_device(pci_info->dev)) { pci_dev_put(pci_info->dev); printk(KERN_ERR "failed to enable:" "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, pci_info->err_dev, pci_info->ctl_name); return -ENODEV; } /* * we do not allocate extra private structure for * edac_pci_ctl_info, but make use of existing * one instead. */ pci_info->edac_idx = edac_pci_alloc_index(); pci_info->edac_dev = edac_pci_alloc_ctl_info(0, pci_info->ctl_name); if (!pci_info->edac_dev) return -ENOMEM; pci_info->edac_dev->pvt_info = pci_info; pci_info->edac_dev->dev = &pci_info->dev->dev; pci_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR; pci_info->edac_dev->ctl_name = pci_info->ctl_name; pci_info->edac_dev->dev_name = dev_name(&pci_info->dev->dev); if (edac_op_state == EDAC_OPSTATE_POLL) pci_info->edac_dev->edac_check = pci_info->check; if (pci_info->init) pci_info->init(pci_info); if (edac_pci_add_device(pci_info->edac_dev, pci_info->edac_idx) > 0) { printk(KERN_ERR "failed to add edac_pci for %s\n", pci_info->ctl_name); edac_pci_free_ctl_info(pci_info->edac_dev); return -ENODEV; } printk(KERN_INFO "added one edac_pci on AMD8111 " "vendor %x, device %x, name %s\n", PCI_VENDOR_ID_AMD, pci_info->err_dev, pci_info->ctl_name); return 0; } static void amd8111_pci_remove(struct pci_dev *dev) { struct amd8111_pci_info *pci_info; for (pci_info = amd8111_pcis; pci_info->err_dev; pci_info++) if (pci_info->dev->device == dev->device) break; if (!pci_info->err_dev) /* should never happen */ return; if (pci_info->edac_dev) { edac_pci_del_device(pci_info->edac_dev->dev); edac_pci_free_ctl_info(pci_info->edac_dev); } if (pci_info->exit) pci_info->exit(pci_info); pci_dev_put(pci_info->dev); } /* PCI Device ID talbe for general EDAC device */ static const struct pci_device_id amd8111_edac_dev_tbl[] = { { PCI_VEND_DEV(AMD, 8111_LPC), .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .class = 0, .class_mask = 0, .driver_data = LPC_BRIDGE, }, { 0, } /* table is NULL-terminated */ }; MODULE_DEVICE_TABLE(pci, amd8111_edac_dev_tbl); static struct pci_driver amd8111_edac_dev_driver = { .name = "AMD8111_EDAC_DEV", .probe = amd8111_dev_probe, .remove = amd8111_dev_remove, .id_table = amd8111_edac_dev_tbl, }; /* PCI Device ID table for EDAC PCI controller */ static const struct pci_device_id amd8111_edac_pci_tbl[] = { { PCI_VEND_DEV(AMD, 8111_PCI), .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .class = 0, .class_mask = 0, .driver_data = PCI_BRIDGE, }, { 0, } /* table is NULL-terminated */ }; MODULE_DEVICE_TABLE(pci, amd8111_edac_pci_tbl); static struct pci_driver amd8111_edac_pci_driver = { .name = "AMD8111_EDAC_PCI", .probe = amd8111_pci_probe, .remove = amd8111_pci_remove, .id_table = amd8111_edac_pci_tbl, }; static int __init amd8111_edac_init(void) { int val; printk(KERN_INFO "AMD8111 EDAC driver " AMD8111_EDAC_REVISION "\n"); printk(KERN_INFO "\t(c) 2008 Wind River Systems, Inc.\n"); /* Only POLL mode supported so far */ edac_op_state = EDAC_OPSTATE_POLL; val = pci_register_driver(&amd8111_edac_dev_driver); val |= pci_register_driver(&amd8111_edac_pci_driver); return val; } static void __exit amd8111_edac_exit(void) { pci_unregister_driver(&amd8111_edac_pci_driver); pci_unregister_driver(&amd8111_edac_dev_driver); } module_init(amd8111_edac_init); module_exit(amd8111_edac_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Cao Qingtao <qingtao.cao@windriver.com>\n"); MODULE_DESCRIPTION("AMD8111 HyperTransport I/O Hub EDAC kernel module");