2007-05-23 17:16:46 +00:00
|
|
|
/*
|
|
|
|
* 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>
|
2011-05-27 17:27:45 +00:00
|
|
|
#include <linux/stat.h>
|
2007-05-23 17:16:46 +00:00
|
|
|
#include <asm/ppc-pci.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
|
|
|
|
|
|
/**
|
2012-02-27 20:04:02 +00:00
|
|
|
* EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic
|
2007-05-23 17:16:46 +00:00
|
|
|
* @_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); \
|
2012-02-27 20:04:05 +00:00
|
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); \
|
2007-05-23 17:16:46 +00:00
|
|
|
\
|
2012-02-27 20:04:05 +00:00
|
|
|
if (!edev) \
|
|
|
|
return 0; \
|
2007-05-23 17:16:46 +00:00
|
|
|
\
|
2012-02-27 20:04:05 +00:00
|
|
|
return sprintf(buf, _format "\n", edev->_memb); \
|
2007-05-23 17:16:46 +00:00
|
|
|
} \
|
|
|
|
static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
|
|
|
|
|
2012-02-27 20:04:05 +00:00
|
|
|
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");
|
2007-05-23 17:16:46 +00:00
|
|
|
|
2014-09-30 02:38:51 +00:00
|
|
|
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);
|
2014-10-01 04:34:51 +00:00
|
|
|
return sprintf(buf, "%0x08x %0x08x\n",
|
2014-09-30 02:38:51 +00:00
|
|
|
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;
|
|
|
|
|
2014-09-30 02:39:02 +00:00
|
|
|
if (eeh_unfreeze_pe(edev->pe, true))
|
2014-09-30 02:38:51 +00:00
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR_RW(eeh_pe_state);
|
|
|
|
|
2007-05-23 17:16:46 +00:00
|
|
|
void eeh_sysfs_add_device(struct pci_dev *pdev)
|
|
|
|
{
|
2013-07-24 02:25:01 +00:00
|
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
2007-05-23 17:16:46 +00:00
|
|
|
int rc=0;
|
|
|
|
|
2014-06-04 01:49:17 +00:00
|
|
|
if (!eeh_enabled())
|
|
|
|
return;
|
|
|
|
|
2013-07-24 02:25:01 +00:00
|
|
|
if (edev && (edev->mode & EEH_DEV_SYSFS))
|
|
|
|
return;
|
|
|
|
|
2007-05-23 17:16:46 +00:00
|
|
|
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);
|
2014-09-30 02:38:51 +00:00
|
|
|
rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state);
|
2007-05-23 17:16:46 +00:00
|
|
|
|
|
|
|
if (rc)
|
2014-09-30 02:38:51 +00:00
|
|
|
pr_warn("EEH: Unable to create sysfs entries\n");
|
2013-07-24 02:25:01 +00:00
|
|
|
else if (edev)
|
|
|
|
edev->mode |= EEH_DEV_SYSFS;
|
2007-05-23 17:16:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void eeh_sysfs_remove_device(struct pci_dev *pdev)
|
|
|
|
{
|
2013-07-24 02:25:01 +00:00
|
|
|
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
|
|
|
|
|
powerpc/eeh: Use partial hotplug for EEH unaware drivers
When EEH error happens to one specific PE, some devices with drivers
supporting EEH won't except hotplug on the device. However, there
might have other deivces without driver, or with driver without EEH
support. For the case, we need do partial hotplug in order to make
sure that the PE becomes absolutely quite during reset. Otherise,
the PE reset might fail and leads to failure of error recovery.
The current code doesn't handle that 'mixed' case properly, it either
uses the error callbacks to the drivers, or tries hotplug, but doesn't
handle a PE (EEH domain) composed of a combination of the two.
The patch intends to support so-called "partial" hotplug for EEH:
Before we do reset, we stop and remove those PCI devices without
EEH sensitive driver. The corresponding EEH devices are not detached
from its PE, but with special flag. After the reset is done, those
EEH devices with the special flag will be scanned one by one.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-24 02:24:58 +00:00
|
|
|
/*
|
|
|
|
* The parent directory might have been removed. We needn't
|
|
|
|
* continue for that case.
|
|
|
|
*/
|
2013-07-24 02:25:01 +00:00
|
|
|
if (!pdev->dev.kobj.sd) {
|
|
|
|
if (edev)
|
|
|
|
edev->mode &= ~EEH_DEV_SYSFS;
|
powerpc/eeh: Use partial hotplug for EEH unaware drivers
When EEH error happens to one specific PE, some devices with drivers
supporting EEH won't except hotplug on the device. However, there
might have other deivces without driver, or with driver without EEH
support. For the case, we need do partial hotplug in order to make
sure that the PE becomes absolutely quite during reset. Otherise,
the PE reset might fail and leads to failure of error recovery.
The current code doesn't handle that 'mixed' case properly, it either
uses the error callbacks to the drivers, or tries hotplug, but doesn't
handle a PE (EEH domain) composed of a combination of the two.
The patch intends to support so-called "partial" hotplug for EEH:
Before we do reset, we stop and remove those PCI devices without
EEH sensitive driver. The corresponding EEH devices are not detached
from its PE, but with special flag. After the reset is done, those
EEH devices with the special flag will be scanned one by one.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-24 02:24:58 +00:00
|
|
|
return;
|
2013-07-24 02:25:01 +00:00
|
|
|
}
|
powerpc/eeh: Use partial hotplug for EEH unaware drivers
When EEH error happens to one specific PE, some devices with drivers
supporting EEH won't except hotplug on the device. However, there
might have other deivces without driver, or with driver without EEH
support. For the case, we need do partial hotplug in order to make
sure that the PE becomes absolutely quite during reset. Otherise,
the PE reset might fail and leads to failure of error recovery.
The current code doesn't handle that 'mixed' case properly, it either
uses the error callbacks to the drivers, or tries hotplug, but doesn't
handle a PE (EEH domain) composed of a combination of the two.
The patch intends to support so-called "partial" hotplug for EEH:
Before we do reset, we stop and remove those PCI devices without
EEH sensitive driver. The corresponding EEH devices are not detached
from its PE, but with special flag. After the reset is done, those
EEH devices with the special flag will be scanned one by one.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-24 02:24:58 +00:00
|
|
|
|
2007-05-23 17:16:46 +00:00
|
|
|
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);
|
2014-09-30 02:38:51 +00:00
|
|
|
device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state);
|
2013-07-24 02:25:01 +00:00
|
|
|
|
|
|
|
if (edev)
|
|
|
|
edev->mode &= ~EEH_DEV_SYSFS;
|
2007-05-23 17:16:46 +00:00
|
|
|
}
|