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linux-next/drivers/edac/amd8111_edac.c
Thomas Gleixner 4505153954 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 136 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:06 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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>
*/
#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_module.h"
#include "amd8111_edac.h"
#define AMD8111_EDAC_REVISION " Ver: 1.0.0"
#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];
int ret = -ENODEV;
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);
goto err;
}
if (pci_enable_device(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);
goto err_dev_put;
}
/*
* 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) {
ret = -ENOMEM;
goto err_dev_put;
}
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);
goto err_edac_free_ctl;
}
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;
err_edac_free_ctl:
edac_device_free_ctl_info(dev_info->edac_dev);
err_dev_put:
pci_dev_put(dev_info->dev);
err:
return ret;
}
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];
int ret = -ENODEV;
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);
goto err;
}
if (pci_enable_device(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);
goto err_dev_put;
}
/*
* 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) {
ret = -ENOMEM;
goto err_dev_put;
}
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);
goto err_edac_free_ctl;
}
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;
err_edac_free_ctl:
edac_pci_free_ctl_info(pci_info->edac_dev);
err_dev_put:
pci_dev_put(pci_info->dev);
err:
return ret;
}
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");
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