Commit | Line | Data |
---|---|---|
e1d04c97 LV |
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> | |
b56eade5 | 26 | #include <linux/stat.h> |
e1d04c97 LV |
27 | #include <asm/ppc-pci.h> |
28 | #include <asm/pci-bridge.h> | |
e1d04c97 LV |
29 | |
30 | /** | |
29f8bf1b | 31 | * EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic |
e1d04c97 LV |
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); \ | |
44da8edc | 44 | struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); \ |
e1d04c97 | 45 | \ |
44da8edc GS |
46 | if (!edev) \ |
47 | return 0; \ | |
e1d04c97 | 48 | \ |
44da8edc | 49 | return sprintf(buf, _format "\n", edev->_memb); \ |
e1d04c97 LV |
50 | } \ |
51 | static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL); | |
52 | ||
44da8edc GS |
53 | EEH_SHOW_ATTR(eeh_mode, mode, "0x%x"); |
54 | EEH_SHOW_ATTR(eeh_config_addr, config_addr, "0x%x"); | |
55 | EEH_SHOW_ATTR(eeh_pe_config_addr, pe_config_addr, "0x%x"); | |
e1d04c97 | 56 | |
940376b3 GS |
57 | static ssize_t eeh_pe_state_show(struct device *dev, |
58 | struct device_attribute *attr, char *buf) | |
59 | { | |
60 | struct pci_dev *pdev = to_pci_dev(dev); | |
61 | struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); | |
62 | int state; | |
63 | ||
64 | if (!edev || !edev->pe) | |
65 | return -ENODEV; | |
66 | ||
67 | state = eeh_ops->get_state(edev->pe, NULL); | |
7531473c | 68 | return sprintf(buf, "0x%08x 0x%08x\n", |
940376b3 GS |
69 | state, edev->pe->state); |
70 | } | |
71 | ||
72 | static ssize_t eeh_pe_state_store(struct device *dev, | |
73 | struct device_attribute *attr, | |
74 | const char *buf, size_t count) | |
75 | { | |
76 | struct pci_dev *pdev = to_pci_dev(dev); | |
77 | struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); | |
940376b3 GS |
78 | |
79 | if (!edev || !edev->pe) | |
80 | return -ENODEV; | |
81 | ||
82 | /* Nothing to do if it's not frozen */ | |
83 | if (!(edev->pe->state & EEH_PE_ISOLATED)) | |
84 | return count; | |
85 | ||
c9dd0143 | 86 | if (eeh_unfreeze_pe(edev->pe, true)) |
940376b3 | 87 | return -EIO; |
940376b3 GS |
88 | |
89 | return count; | |
90 | } | |
91 | ||
92 | static DEVICE_ATTR_RW(eeh_pe_state); | |
93 | ||
e1d04c97 LV |
94 | void eeh_sysfs_add_device(struct pci_dev *pdev) |
95 | { | |
ab55d218 | 96 | struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); |
e1d04c97 LV |
97 | int rc=0; |
98 | ||
2213fb14 WY |
99 | if (!eeh_enabled()) |
100 | return; | |
101 | ||
ab55d218 GS |
102 | if (edev && (edev->mode & EEH_DEV_SYSFS)) |
103 | return; | |
104 | ||
e1d04c97 LV |
105 | rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode); |
106 | rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr); | |
107 | rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); | |
940376b3 | 108 | rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state); |
e1d04c97 LV |
109 | |
110 | if (rc) | |
940376b3 | 111 | pr_warn("EEH: Unable to create sysfs entries\n"); |
ab55d218 GS |
112 | else if (edev) |
113 | edev->mode |= EEH_DEV_SYSFS; | |
e1d04c97 LV |
114 | } |
115 | ||
116 | void eeh_sysfs_remove_device(struct pci_dev *pdev) | |
117 | { | |
ab55d218 GS |
118 | struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); |
119 | ||
f5c57710 GS |
120 | /* |
121 | * The parent directory might have been removed. We needn't | |
122 | * continue for that case. | |
123 | */ | |
ab55d218 GS |
124 | if (!pdev->dev.kobj.sd) { |
125 | if (edev) | |
126 | edev->mode &= ~EEH_DEV_SYSFS; | |
f5c57710 | 127 | return; |
ab55d218 | 128 | } |
f5c57710 | 129 | |
e1d04c97 LV |
130 | device_remove_file(&pdev->dev, &dev_attr_eeh_mode); |
131 | device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr); | |
132 | device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); | |
940376b3 | 133 | device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state); |
ab55d218 GS |
134 | |
135 | if (edev) | |
136 | edev->mode &= ~EEH_DEV_SYSFS; | |
e1d04c97 | 137 | } |