Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[linux-2.6] / arch / powerpc / platforms / pseries / eeh_sysfs.c
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 <asm/ppc-pci.h>
27 #include <asm/pci-bridge.h>
28 #include <linux/kobject.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)               \
40 static 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 }                                                        \
53 static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
54
55
56 EEH_SHOW_ATTR(eeh_mode, eeh_mode, "0x%x");
57 EEH_SHOW_ATTR(eeh_config_addr, eeh_config_addr, "0x%x");
58 EEH_SHOW_ATTR(eeh_pe_config_addr, eeh_pe_config_addr, "0x%x");
59 EEH_SHOW_ATTR(eeh_check_count, eeh_check_count, "%d");
60 EEH_SHOW_ATTR(eeh_freeze_count, eeh_freeze_count, "%d");
61 EEH_SHOW_ATTR(eeh_false_positives, eeh_false_positives, "%d");
62
63 void 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
78 void 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