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Release 4.14 drivers/edac/amd8131_edac.c

Directory: drivers/edac
/*
 * amd8131_edac.c, AMD8131 hypertransport 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/io.h>
#include <linux/bitops.h>
#include <linux/edac.h>
#include <linux/pci_ids.h>

#include "edac_module.h"
#include "amd8131_edac.h"


#define AMD8131_EDAC_REVISION	" Ver: 1.0.0"

#define AMD8131_EDAC_MOD_STR	"amd8131_edac"

/* Wrapper functions for accessing PCI configuration space */

static void 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 AMD8131_EDAC_MOD_STR " PCI Access Read Error at 0x%x\n", reg); }

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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 AMD8131_EDAC_MOD_STR " PCI Access Write Error at 0x%x\n", reg); }

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static char * const bridge_str[] = { [NORTH_A] = "NORTH A", [NORTH_B] = "NORTH B", [SOUTH_A] = "SOUTH A", [SOUTH_B] = "SOUTH B", [NO_BRIDGE] = "NO BRIDGE", }; /* Support up to two AMD8131 chipsets on a platform */ static struct amd8131_dev_info amd8131_devices[] = { { .inst = NORTH_A, .devfn = DEVFN_PCIX_BRIDGE_NORTH_A, .ctl_name = "AMD8131_PCIX_NORTH_A", }, { .inst = NORTH_B, .devfn = DEVFN_PCIX_BRIDGE_NORTH_B, .ctl_name = "AMD8131_PCIX_NORTH_B", }, { .inst = SOUTH_A, .devfn = DEVFN_PCIX_BRIDGE_SOUTH_A, .ctl_name = "AMD8131_PCIX_SOUTH_A", }, { .inst = SOUTH_B, .devfn = DEVFN_PCIX_BRIDGE_SOUTH_B, .ctl_name = "AMD8131_PCIX_SOUTH_B", }, {.inst = NO_BRIDGE,}, };
static void amd8131_pcix_init(struct amd8131_dev_info *dev_info) { u32 val32; struct pci_dev *dev = dev_info->dev; /* First clear error detection flags */ edac_pci_read_dword(dev, REG_MEM_LIM, &val32); if (val32 & MEM_LIMIT_MASK) edac_pci_write_dword(dev, REG_MEM_LIM, val32); /* Clear Discard Timer Timedout flag */ edac_pci_read_dword(dev, REG_INT_CTLR, &val32); if (val32 & INT_CTLR_DTS) edac_pci_write_dword(dev, REG_INT_CTLR, val32); /* Clear CRC Error flag on link side A */ edac_pci_read_dword(dev, REG_LNK_CTRL_A, &val32); if (val32 & LNK_CTRL_CRCERR_A) edac_pci_write_dword(dev, REG_LNK_CTRL_A, val32); /* Clear CRC Error flag on link side B */ edac_pci_read_dword(dev, REG_LNK_CTRL_B, &val32); if (val32 & LNK_CTRL_CRCERR_B) edac_pci_write_dword(dev, REG_LNK_CTRL_B, val32); /* * Then enable all error detections. * * Setup Discard Timer Sync Flood Enable, * System Error Enable and Parity Error Enable. */ edac_pci_read_dword(dev, REG_INT_CTLR, &val32); val32 |= INT_CTLR_PERR | INT_CTLR_SERR | INT_CTLR_DTSE; edac_pci_write_dword(dev, REG_INT_CTLR, val32); /* Enable overall SERR Error detection */ edac_pci_read_dword(dev, REG_STS_CMD, &val32); val32 |= STS_CMD_SERREN; edac_pci_write_dword(dev, REG_STS_CMD, val32); /* Setup CRC Flood Enable for link side A */ edac_pci_read_dword(dev, REG_LNK_CTRL_A, &val32); val32 |= LNK_CTRL_CRCFEN; edac_pci_write_dword(dev, REG_LNK_CTRL_A, val32); /* Setup CRC Flood Enable for link side B */ edac_pci_read_dword(dev, REG_LNK_CTRL_B, &val32); val32 |= LNK_CTRL_CRCFEN; edac_pci_write_dword(dev, REG_LNK_CTRL_B, val32); }

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static void amd8131_pcix_exit(struct amd8131_dev_info *dev_info) { u32 val32; struct pci_dev *dev = dev_info->dev; /* Disable SERR, PERR and DTSE Error detection */ edac_pci_read_dword(dev, REG_INT_CTLR, &val32); val32 &= ~(INT_CTLR_PERR | INT_CTLR_SERR | INT_CTLR_DTSE); edac_pci_write_dword(dev, REG_INT_CTLR, val32); /* Disable overall System Error detection */ edac_pci_read_dword(dev, REG_STS_CMD, &val32); val32 &= ~STS_CMD_SERREN; edac_pci_write_dword(dev, REG_STS_CMD, val32); /* Disable CRC Sync Flood on link side A */ edac_pci_read_dword(dev, REG_LNK_CTRL_A, &val32); val32 &= ~LNK_CTRL_CRCFEN; edac_pci_write_dword(dev, REG_LNK_CTRL_A, val32); /* Disable CRC Sync Flood on link side B */ edac_pci_read_dword(dev, REG_LNK_CTRL_B, &val32); val32 &= ~LNK_CTRL_CRCFEN; edac_pci_write_dword(dev, REG_LNK_CTRL_B, val32); }

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static void amd8131_pcix_check(struct edac_pci_ctl_info *edac_dev) { struct amd8131_dev_info *dev_info = edac_dev->pvt_info; struct pci_dev *dev = dev_info->dev; u32 val32; /* Check PCI-X Bridge Memory Base-Limit Register for errors */ edac_pci_read_dword(dev, REG_MEM_LIM, &val32); if (val32 & MEM_LIMIT_MASK) { printk(KERN_INFO "Error(s) in mem limit register " "on %s bridge\n", dev_info->ctl_name); printk(KERN_INFO "DPE: %d, RSE: %d, RMA: %d\n" "RTA: %d, STA: %d, MDPE: %d\n", val32 & MEM_LIMIT_DPE, val32 & MEM_LIMIT_RSE, val32 & MEM_LIMIT_RMA, val32 & MEM_LIMIT_RTA, val32 & MEM_LIMIT_STA, val32 & MEM_LIMIT_MDPE); val32 |= MEM_LIMIT_MASK; edac_pci_write_dword(dev, REG_MEM_LIM, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check if Discard Timer timed out */ edac_pci_read_dword(dev, REG_INT_CTLR, &val32); if (val32 & INT_CTLR_DTS) { printk(KERN_INFO "Error(s) in interrupt and control register " "on %s bridge\n", dev_info->ctl_name); printk(KERN_INFO "DTS: %d\n", val32 & INT_CTLR_DTS); val32 |= INT_CTLR_DTS; edac_pci_write_dword(dev, REG_INT_CTLR, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check if CRC error happens on link side A */ edac_pci_read_dword(dev, REG_LNK_CTRL_A, &val32); if (val32 & LNK_CTRL_CRCERR_A) { printk(KERN_INFO "Error(s) in link conf and control register " "on %s bridge\n", dev_info->ctl_name); printk(KERN_INFO "CRCERR: %d\n", val32 & LNK_CTRL_CRCERR_A); val32 |= LNK_CTRL_CRCERR_A; edac_pci_write_dword(dev, REG_LNK_CTRL_A, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } /* Check if CRC error happens on link side B */ edac_pci_read_dword(dev, REG_LNK_CTRL_B, &val32); if (val32 & LNK_CTRL_CRCERR_B) { printk(KERN_INFO "Error(s) in link conf and control register " "on %s bridge\n", dev_info->ctl_name); printk(KERN_INFO "CRCERR: %d\n", val32 & LNK_CTRL_CRCERR_B); val32 |= LNK_CTRL_CRCERR_B; edac_pci_write_dword(dev, REG_LNK_CTRL_B, val32); edac_pci_handle_npe(edac_dev, edac_dev->ctl_name); } }

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static struct amd8131_info amd8131_chipset = { .err_dev = PCI_DEVICE_ID_AMD_8131_APIC, .devices = amd8131_devices, .init = amd8131_pcix_init, .exit = amd8131_pcix_exit, .check = amd8131_pcix_check, }; /* * There are 4 PCIX Bridges on ATCA-6101 that share the same PCI Device ID, * so amd8131_probe() would be called by kernel 4 times, with different * address of pci_dev for each of them each time. */
static int amd8131_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct amd8131_dev_info *dev_info; for (dev_info = amd8131_chipset.devices; dev_info->inst != NO_BRIDGE; dev_info++) if (dev_info->devfn == dev->devfn) break; if (dev_info->inst == NO_BRIDGE) /* should never happen */ return -ENODEV; /* * We can't call pci_get_device() as we are used to do because * there are 4 of them but pci_dev_get() instead. */ dev_info->dev = pci_dev_get(dev); if (pci_enable_device(dev_info->dev)) { pci_dev_put(dev_info->dev); printk(KERN_ERR "failed to enable:" "vendor %x, device %x, devfn %x, name %s\n", PCI_VENDOR_ID_AMD, amd8131_chipset.err_dev, dev_info->devfn, dev_info->ctl_name); return -ENODEV; } /* * we do not allocate extra private structure for * edac_pci_ctl_info, but make use of existing * one instead. */ dev_info->edac_idx = edac_pci_alloc_index(); dev_info->edac_dev = edac_pci_alloc_ctl_info(0, dev_info->ctl_name); 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 = AMD8131_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 = amd8131_chipset.check; if (amd8131_chipset.init) amd8131_chipset.init(dev_info); if (edac_pci_add_device(dev_info->edac_dev, dev_info->edac_idx) > 0) { printk(KERN_ERR "failed edac_pci_add_device() for %s\n", dev_info->ctl_name); edac_pci_free_ctl_info(dev_info->edac_dev); return -ENODEV; } printk(KERN_INFO "added one device on AMD8131 " "vendor %x, device %x, devfn %x, name %s\n", PCI_VENDOR_ID_AMD, amd8131_chipset.err_dev, dev_info->devfn, dev_info->ctl_name); return 0; }

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static void amd8131_remove(struct pci_dev *dev) { struct amd8131_dev_info *dev_info; for (dev_info = amd8131_chipset.devices; dev_info->inst != NO_BRIDGE; dev_info++) if (dev_info->devfn == dev->devfn) break; if (dev_info->inst == NO_BRIDGE) /* should never happen */ return; if (dev_info->edac_dev) { edac_pci_del_device(dev_info->edac_dev->dev); edac_pci_free_ctl_info(dev_info->edac_dev); } if (amd8131_chipset.exit) amd8131_chipset.exit(dev_info); pci_dev_put(dev_info->dev); }

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static const struct pci_device_id amd8131_edac_pci_tbl[] = { { PCI_VEND_DEV(AMD, 8131_BRIDGE), .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .class = 0, .class_mask = 0, .driver_data = 0, }, { 0, } /* table is NULL-terminated */ }; MODULE_DEVICE_TABLE(pci, amd8131_edac_pci_tbl); static struct pci_driver amd8131_edac_driver = { .name = AMD8131_EDAC_MOD_STR, .probe = amd8131_probe, .remove = amd8131_remove, .id_table = amd8131_edac_pci_tbl, };
static int __init amd8131_edac_init(void) { printk(KERN_INFO "AMD8131 EDAC driver " AMD8131_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; return pci_register_driver(&amd8131_edac_driver); }

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static void __exit amd8131_edac_exit(void) { pci_unregister_driver(&amd8131_edac_driver); }

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module_init(amd8131_edac_init); module_exit(amd8131_edac_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Cao Qingtao <qingtao.cao@windriver.com>\n"); MODULE_DESCRIPTION("AMD8131 HyperTransport PCI-X Tunnel EDAC kernel module");

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Directory: drivers/edac
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