summaryrefslogtreecommitdiffstats
path: root/arch/s390/pci/pci_sysfs.c
blob: 430c14b006d17b71854ac24345a5e90140e8fdf1 (plain)
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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright IBM Corp. 2012
 *
 * Author(s):
 *   Jan Glauber <jang@linux.vnet.ibm.com>
 */

#define KMSG_COMPONENT "zpci"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/kernel.h>
#include <linux/stat.h>
#include <linux/pci.h>

#include <asm/sclp.h>

#define zpci_attr(name, fmt, member)					\
static ssize_t name##_show(struct device *dev,				\
			   struct device_attribute *attr, char *buf)	\
{									\
	struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));		\
									\
	return sprintf(buf, fmt, zdev->member);				\
}									\
static DEVICE_ATTR_RO(name)

zpci_attr(function_id, "0x%08x\n", fid);
zpci_attr(function_handle, "0x%08x\n", fh);
zpci_attr(pchid, "0x%04x\n", pchid);
zpci_attr(pfgid, "0x%02x\n", pfgid);
zpci_attr(vfn, "0x%04x\n", vfn);
zpci_attr(pft, "0x%02x\n", pft);
zpci_attr(uid, "0x%x\n", uid);
zpci_attr(segment0, "0x%02x\n", pfip[0]);
zpci_attr(segment1, "0x%02x\n", pfip[1]);
zpci_attr(segment2, "0x%02x\n", pfip[2]);
zpci_attr(segment3, "0x%02x\n", pfip[3]);

static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct zpci_dev *zdev = to_zpci(pdev);
	int ret;

	if (!device_remove_file_self(dev, attr))
		return count;

	pci_lock_rescan_remove();
	pci_stop_and_remove_bus_device(pdev);
	ret = zpci_disable_device(zdev);
	if (ret)
		goto error;

	ret = zpci_enable_device(zdev);
	if (ret)
		goto error;

	pci_rescan_bus(zdev->bus);
	pci_unlock_rescan_remove();

	return count;

error:
	pci_unlock_rescan_remove();
	return ret;
}
static DEVICE_ATTR_WO(recover);

static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
				struct bin_attribute *attr, char *buf,
				loff_t off, size_t count)
{
	struct device *dev = kobj_to_dev(kobj);
	struct pci_dev *pdev = to_pci_dev(dev);
	struct zpci_dev *zdev = to_zpci(pdev);

	return memory_read_from_buffer(buf, count, &off, zdev->util_str,
				       sizeof(zdev->util_str));
}
static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN);

static ssize_t report_error_write(struct file *filp, struct kobject *kobj,
				  struct bin_attribute *attr, char *buf,
				  loff_t off, size_t count)
{
	struct zpci_report_error_header *report = (void *) buf;
	struct device *dev = kobj_to_dev(kobj);
	struct pci_dev *pdev = to_pci_dev(dev);
	struct zpci_dev *zdev = to_zpci(pdev);
	int ret;

	if (off || (count < sizeof(*report)))
		return -EINVAL;

	ret = sclp_pci_report(report, zdev->fh, zdev->fid);

	return ret ? ret : count;
}
static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE);

static struct bin_attribute *zpci_bin_attrs[] = {
	&bin_attr_util_string,
	&bin_attr_report_error,
	NULL,
};

static struct attribute *zpci_dev_attrs[] = {
	&dev_attr_function_id.attr,
	&dev_attr_function_handle.attr,
	&dev_attr_pchid.attr,
	&dev_attr_pfgid.attr,
	&dev_attr_pft.attr,
	&dev_attr_vfn.attr,
	&dev_attr_uid.attr,
	&dev_attr_recover.attr,
	NULL,
};
static struct attribute_group zpci_attr_group = {
	.attrs = zpci_dev_attrs,
	.bin_attrs = zpci_bin_attrs,
};

static struct attribute *pfip_attrs[] = {
	&dev_attr_segment0.attr,
	&dev_attr_segment1.attr,
	&dev_attr_segment2.attr,
	&dev_attr_segment3.attr,
	NULL,
};
static struct attribute_group pfip_attr_group = {
	.name = "pfip",
	.attrs = pfip_attrs,
};

const struct attribute_group *zpci_attr_groups[] = {
	&zpci_attr_group,
	&pfip_attr_group,
	NULL,
};