mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 12:06:41 +07:00
7531473c30
Obviously I had wrong format given to the PE state output from /sys/bus/pci/devices/xxxx/eeh_pe_state with some typoes, which was introduced by commit2013add4ce. The patch fixes it up. Fixes:2013add4ce("powerpc/eeh: Show hex prefix for PE state sysfs") Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
|
|
* Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
|
|
* Copyright IBM Corporation 2007
|
|
* Copyright Linas Vepstas <linas@austin.ibm.com> 2007
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* 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, GOOD TITLE or
|
|
* NON INFRINGEMENT. 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/stat.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include <asm/pci-bridge.h>
|
|
|
|
/**
|
|
* EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic
|
|
* @_name: name of file in sysfs directory
|
|
* @_memb: name of member in struct pci_dn to access
|
|
* @_format: printf format for display
|
|
*
|
|
* All of the attributes look very similar, so just
|
|
* auto-gen a cut-n-paste routine to display them.
|
|
*/
|
|
#define EEH_SHOW_ATTR(_name,_memb,_format) \
|
|
static ssize_t eeh_show_##_name(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct pci_dev *pdev = to_pci_dev(dev); \
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); \
|
|
\
|
|
if (!edev) \
|
|
return 0; \
|
|
\
|
|
return sprintf(buf, _format "\n", edev->_memb); \
|
|
} \
|
|
static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
|
|
|
|
EEH_SHOW_ATTR(eeh_mode, mode, "0x%x");
|
|
EEH_SHOW_ATTR(eeh_config_addr, config_addr, "0x%x");
|
|
EEH_SHOW_ATTR(eeh_pe_config_addr, pe_config_addr, "0x%x");
|
|
|
|
static ssize_t eeh_pe_state_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
|
int state;
|
|
|
|
if (!edev || !edev->pe)
|
|
return -ENODEV;
|
|
|
|
state = eeh_ops->get_state(edev->pe, NULL);
|
|
return sprintf(buf, "0x%08x 0x%08x\n",
|
|
state, edev->pe->state);
|
|
}
|
|
|
|
static ssize_t eeh_pe_state_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
|
|
|
if (!edev || !edev->pe)
|
|
return -ENODEV;
|
|
|
|
/* Nothing to do if it's not frozen */
|
|
if (!(edev->pe->state & EEH_PE_ISOLATED))
|
|
return count;
|
|
|
|
if (eeh_unfreeze_pe(edev->pe, true))
|
|
return -EIO;
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(eeh_pe_state);
|
|
|
|
void eeh_sysfs_add_device(struct pci_dev *pdev)
|
|
{
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
|
int rc=0;
|
|
|
|
if (!eeh_enabled())
|
|
return;
|
|
|
|
if (edev && (edev->mode & EEH_DEV_SYSFS))
|
|
return;
|
|
|
|
rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
|
|
rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
|
|
rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
|
|
rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state);
|
|
|
|
if (rc)
|
|
pr_warn("EEH: Unable to create sysfs entries\n");
|
|
else if (edev)
|
|
edev->mode |= EEH_DEV_SYSFS;
|
|
}
|
|
|
|
void eeh_sysfs_remove_device(struct pci_dev *pdev)
|
|
{
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
|
|
|
/*
|
|
* The parent directory might have been removed. We needn't
|
|
* continue for that case.
|
|
*/
|
|
if (!pdev->dev.kobj.sd) {
|
|
if (edev)
|
|
edev->mode &= ~EEH_DEV_SYSFS;
|
|
return;
|
|
}
|
|
|
|
device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
|
|
device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
|
|
device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
|
|
device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state);
|
|
|
|
if (edev)
|
|
edev->mode &= ~EEH_DEV_SYSFS;
|
|
}
|