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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/powerpc/platforms/pseries/eeh_sysfs.c
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/*

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 * Sysfs entries for PCI Error Recovery for PAPR-compliant platform.

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 * Copyright IBM Corporation 2007

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 * Copyright Linas Vepstas <[email protected]> 2007

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 *

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 * All rights reserved.

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or (at

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 * your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or

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 * NON INFRINGEMENT.  See the GNU General Public License for more

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 * details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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 *

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 * Send comments and feedback to Linas Vepstas <[email protected]>

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 */

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#include <linux/pci.h>

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#include <asm/ppc-pci.h>

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#include <asm/pci-bridge.h>

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/**

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 * EEH_SHOW_ATTR -- create sysfs entry for eeh statistic

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 * @_name: name of file in sysfs directory

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 * @_memb: name of member in struct pci_dn to access

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 * @_format: printf format for display

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 *

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 * All of the attributes look very similar, so just

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 * auto-gen a cut-n-paste routine to display them.

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 */

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#define EEH_SHOW_ATTR(_name,_memb,_format)               \

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static ssize_t eeh_show_##_name(struct device *dev,      \

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		struct device_attribute *attr, char *buf)          \

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{                                                        \

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	struct pci_dev *pdev = to_pci_dev(dev);               \

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	struct device_node *dn = pci_device_to_OF_node(pdev); \

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	struct pci_dn *pdn;                                   \

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	                                                      \

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	if (!dn || PCI_DN(dn) == NULL)                        \

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		return 0;                                          \

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	                                                      \

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	pdn = PCI_DN(dn);                                     \

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	return sprintf(buf, _format "\n", pdn->_memb);        \

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}                                                        \

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static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);

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EEH_SHOW_ATTR(eeh_mode, eeh_mode, "0x%x");

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EEH_SHOW_ATTR(eeh_config_addr, eeh_config_addr, "0x%x");

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EEH_SHOW_ATTR(eeh_pe_config_addr, eeh_pe_config_addr, "0x%x");

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EEH_SHOW_ATTR(eeh_check_count, eeh_check_count, "%d");

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EEH_SHOW_ATTR(eeh_freeze_count, eeh_freeze_count, "%d");

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EEH_SHOW_ATTR(eeh_false_positives, eeh_false_positives, "%d");

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void eeh_sysfs_add_device(struct pci_dev *pdev)

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{

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	int rc=0;

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_check_count);

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_false_positives);

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	rc += device_create_file(&pdev->dev, &dev_attr_eeh_freeze_count);

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	if (rc)

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		printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");

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}

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void eeh_sysfs_remove_device(struct pci_dev *pdev)

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{

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	device_remove_file(&pdev->dev, &dev_attr_eeh_mode);

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	device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);

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	device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);

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	device_remove_file(&pdev->dev, &dev_attr_eeh_check_count);

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	device_remove_file(&pdev->dev, &dev_attr_eeh_false_positives);

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	device_remove_file(&pdev->dev, &dev_attr_eeh_freeze_count);

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}

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