linux/arch/powerpc/platforms/pseries/eeh_sysfs.c
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   1/*
   2 * Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
   3 * Copyright IBM Corporation 2007
   4 * Copyright Linas Vepstas <linas@austin.ibm.com> 2007
   5 *
   6 * All rights reserved.
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or (at
  11 * your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful, but
  14 * WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  16 * NON INFRINGEMENT.  See the GNU General Public License for more
  17 * details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 *
  23 * Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
  24 */
  25#include <linux/pci.h>
  26#include <linux/stat.h>
  27#include <asm/ppc-pci.h>
  28#include <asm/pci-bridge.h>
  29
  30/**
  31 * EEH_SHOW_ATTR -- create sysfs entry for eeh statistic
  32 * @_name: name of file in sysfs directory
  33 * @_memb: name of member in struct pci_dn to access
  34 * @_format: printf format for display
  35 *
  36 * All of the attributes look very similar, so just
  37 * auto-gen a cut-n-paste routine to display them.
  38 */
  39#define EEH_SHOW_ATTR(_name,_memb,_format)               \
  40static ssize_t eeh_show_##_name(struct device *dev,      \
  41                struct device_attribute *attr, char *buf)          \
  42{                                                        \
  43        struct pci_dev *pdev = to_pci_dev(dev);               \
  44        struct device_node *dn = pci_device_to_OF_node(pdev); \
  45        struct pci_dn *pdn;                                   \
  46                                                              \
  47        if (!dn || PCI_DN(dn) == NULL)                        \
  48                return 0;                                          \
  49                                                              \
  50        pdn = PCI_DN(dn);                                     \
  51        return sprintf(buf, _format "\n", pdn->_memb);        \
  52}                                                        \
  53static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
  54
  55
  56EEH_SHOW_ATTR(eeh_mode, eeh_mode, "0x%x");
  57EEH_SHOW_ATTR(eeh_config_addr, eeh_config_addr, "0x%x");
  58EEH_SHOW_ATTR(eeh_pe_config_addr, eeh_pe_config_addr, "0x%x");
  59EEH_SHOW_ATTR(eeh_check_count, eeh_check_count, "%d");
  60EEH_SHOW_ATTR(eeh_freeze_count, eeh_freeze_count, "%d");
  61EEH_SHOW_ATTR(eeh_false_positives, eeh_false_positives, "%d");
  62
  63void eeh_sysfs_add_device(struct pci_dev *pdev)
  64{
  65        int rc=0;
  66
  67        rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
  68        rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
  69        rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
  70        rc += device_create_file(&pdev->dev, &dev_attr_eeh_check_count);
  71        rc += device_create_file(&pdev->dev, &dev_attr_eeh_false_positives);
  72        rc += device_create_file(&pdev->dev, &dev_attr_eeh_freeze_count);
  73
  74        if (rc)
  75                printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");
  76}
  77
  78void eeh_sysfs_remove_device(struct pci_dev *pdev)
  79{
  80        device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
  81        device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
  82        device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
  83        device_remove_file(&pdev->dev, &dev_attr_eeh_check_count);
  84        device_remove_file(&pdev->dev, &dev_attr_eeh_false_positives);
  85        device_remove_file(&pdev->dev, &dev_attr_eeh_freeze_count);
  86}
  87
  88