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7
8#define KMSG_COMPONENT "zpci"
9#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
10
11#include <linux/kernel.h>
12#include <linux/stat.h>
13#include <linux/pci.h>
14
15#include <asm/sclp.h>
16
17#define zpci_attr(name, fmt, member) \
18static ssize_t name##_show(struct device *dev, \
19 struct device_attribute *attr, char *buf) \
20{ \
21 struct zpci_dev *zdev = to_zpci(to_pci_dev(dev)); \
22 \
23 return sprintf(buf, fmt, zdev->member); \
24} \
25static DEVICE_ATTR_RO(name)
26
27zpci_attr(function_id, "0x%08x\n", fid);
28zpci_attr(function_handle, "0x%08x\n", fh);
29zpci_attr(pchid, "0x%04x\n", pchid);
30zpci_attr(pfgid, "0x%02x\n", pfgid);
31zpci_attr(vfn, "0x%04x\n", vfn);
32zpci_attr(pft, "0x%02x\n", pft);
33zpci_attr(uid, "0x%x\n", uid);
34zpci_attr(segment0, "0x%02x\n", pfip[0]);
35zpci_attr(segment1, "0x%02x\n", pfip[1]);
36zpci_attr(segment2, "0x%02x\n", pfip[2]);
37zpci_attr(segment3, "0x%02x\n", pfip[3]);
38
39static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
40 const char *buf, size_t count)
41{
42 struct pci_dev *pdev = to_pci_dev(dev);
43 struct zpci_dev *zdev = to_zpci(pdev);
44 int ret;
45
46 if (!device_remove_file_self(dev, attr))
47 return count;
48
49 pci_lock_rescan_remove();
50 pci_stop_and_remove_bus_device(pdev);
51 ret = zpci_disable_device(zdev);
52 if (ret)
53 goto error;
54
55 ret = zpci_enable_device(zdev);
56 if (ret)
57 goto error;
58
59 pci_rescan_bus(zdev->bus);
60 pci_unlock_rescan_remove();
61
62 return count;
63
64error:
65 pci_unlock_rescan_remove();
66 return ret;
67}
68static DEVICE_ATTR_WO(recover);
69
70static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
71 struct bin_attribute *attr, char *buf,
72 loff_t off, size_t count)
73{
74 struct device *dev = kobj_to_dev(kobj);
75 struct pci_dev *pdev = to_pci_dev(dev);
76 struct zpci_dev *zdev = to_zpci(pdev);
77
78 return memory_read_from_buffer(buf, count, &off, zdev->util_str,
79 sizeof(zdev->util_str));
80}
81static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN);
82
83static ssize_t report_error_write(struct file *filp, struct kobject *kobj,
84 struct bin_attribute *attr, char *buf,
85 loff_t off, size_t count)
86{
87 struct zpci_report_error_header *report = (void *) buf;
88 struct device *dev = kobj_to_dev(kobj);
89 struct pci_dev *pdev = to_pci_dev(dev);
90 struct zpci_dev *zdev = to_zpci(pdev);
91 int ret;
92
93 if (off || (count < sizeof(*report)))
94 return -EINVAL;
95
96 ret = sclp_pci_report(report, zdev->fh, zdev->fid);
97
98 return ret ? ret : count;
99}
100static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE);
101
102static struct bin_attribute *zpci_bin_attrs[] = {
103 &bin_attr_util_string,
104 &bin_attr_report_error,
105 NULL,
106};
107
108static struct attribute *zpci_dev_attrs[] = {
109 &dev_attr_function_id.attr,
110 &dev_attr_function_handle.attr,
111 &dev_attr_pchid.attr,
112 &dev_attr_pfgid.attr,
113 &dev_attr_pft.attr,
114 &dev_attr_vfn.attr,
115 &dev_attr_uid.attr,
116 &dev_attr_recover.attr,
117 NULL,
118};
119static struct attribute_group zpci_attr_group = {
120 .attrs = zpci_dev_attrs,
121 .bin_attrs = zpci_bin_attrs,
122};
123
124static struct attribute *pfip_attrs[] = {
125 &dev_attr_segment0.attr,
126 &dev_attr_segment1.attr,
127 &dev_attr_segment2.attr,
128 &dev_attr_segment3.attr,
129 NULL,
130};
131static struct attribute_group pfip_attr_group = {
132 .name = "pfip",
133 .attrs = pfip_attrs,
134};
135
136const struct attribute_group *zpci_attr_groups[] = {
137 &zpci_attr_group,
138 &pfip_attr_group,
139 NULL,
140};
141
