1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
* Copyright IBM Corporation 2007
* Copyright Linas Vepstas <linas@austin.ibm.com> 2007
*
* Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
*/
#include <linux/pci.h>
#include <linux/stat.h>
#include <asm/ppc-pci.h>
#include <asm/pci-bridge.h>
/**
* EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic
* @_name: name of file in sysfs directory
* @_memb: name of member in struct eeh_dev 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); \
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); \
\
if (!edev) \
return 0; \
\
return sprintf(buf, _format "\n", edev->_memb); \
} \
static DEVICE_ATTR(_name, 0444, eeh_show_##_name, NULL);
EEH_SHOW_ATTR(eeh_mode, mode, "0x%x");
EEH_SHOW_ATTR(eeh_pe_config_addr, pe_config_addr, "0x%x");
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);
return sprintf(buf, "0x%08x 0x%08x\n",
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;
if (eeh_unfreeze_pe(edev->pe))
return -EIO;
eeh_pe_state_clear(edev->pe, EEH_PE_ISOLATED, true);
return count;
}
static DEVICE_ATTR_RW(eeh_pe_state);
#if defined(CONFIG_PCI_IOV) && defined(CONFIG_PPC_PSERIES)
static ssize_t eeh_notify_resume_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);
struct pci_dn *pdn = pci_get_pdn(pdev);
if (!edev || !edev->pe)
return -ENODEV;
return sprintf(buf, "%d\n", pdn->last_allow_rc);
}
static ssize_t eeh_notify_resume_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 || !eeh_ops->notify_resume)
return -ENODEV;
if (eeh_ops->notify_resume(edev))
return -EIO;
return count;
}
static DEVICE_ATTR_RW(eeh_notify_resume);
static int eeh_notify_resume_add(struct pci_dev *pdev)
{
struct device_node *np;
int rc = 0;
np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);
if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))
rc = device_create_file(&pdev->dev, &dev_attr_eeh_notify_resume);
return rc;
}
static void eeh_notify_resume_remove(struct pci_dev *pdev)
{
struct device_node *np;
np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);
if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))
device_remove_file(&pdev->dev, &dev_attr_eeh_notify_resume);
}
#else
static inline int eeh_notify_resume_add(struct pci_dev *pdev) { return 0; }
static inline void eeh_notify_resume_remove(struct pci_dev *pdev) { }
#endif /* CONFIG_PCI_IOV && CONFIG PPC_PSERIES*/
void eeh_sysfs_add_device(struct pci_dev *pdev)
{
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
int rc=0;
if (!eeh_enabled())
return;
if (edev && (edev->mode & EEH_DEV_SYSFS))
return;
rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state);
rc += eeh_notify_resume_add(pdev);
if (rc)
pr_warn("EEH: Unable to create sysfs entries\n");
else if (edev)
edev->mode |= EEH_DEV_SYSFS;
}
void eeh_sysfs_remove_device(struct pci_dev *pdev)
{
struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
if (!edev) {
WARN_ON(eeh_enabled());
return;
}
edev->mode &= ~EEH_DEV_SYSFS;
/*
* The parent directory might have been removed. We needn't
* continue for that case.
*/
if (!pdev->dev.kobj.sd)
return;
device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state);
eeh_notify_resume_remove(pdev);
}
|
