1/*
2 * Copyright IBM Corp. 2012
3 *
4 * Author(s):
5 *   Jan Glauber <jang@linux.vnet.ibm.com>
6 */
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#define zpci_attr(name, fmt, member)					\
16static ssize_t name##_show(struct device *dev,				\
17			   struct device_attribute *attr, char *buf)	\
18{									\
19	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));		\
20									\
21	return sprintf(buf, fmt, zdev->member);				\
22}									\
23static DEVICE_ATTR_RO(name)
24
25zpci_attr(function_id, "0x%08x\n", fid);
26zpci_attr(function_handle, "0x%08x\n", fh);
27zpci_attr(pchid, "0x%04x\n", pchid);
28zpci_attr(pfgid, "0x%02x\n", pfgid);
29zpci_attr(vfn, "0x%04x\n", vfn);
30zpci_attr(pft, "0x%02x\n", pft);
31zpci_attr(uid, "0x%x\n", uid);
32zpci_attr(segment0, "0x%02x\n", pfip[0]);
33zpci_attr(segment1, "0x%02x\n", pfip[1]);
34zpci_attr(segment2, "0x%02x\n", pfip[2]);
35zpci_attr(segment3, "0x%02x\n", pfip[3]);
36
37static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
38			     const char *buf, size_t count)
39{
40	struct pci_dev *pdev = to_pci_dev(dev);
41	struct zpci_dev *zdev = get_zdev(pdev);
42	int ret;
43
44	if (!device_remove_file_self(dev, attr))
45		return count;
46
47	pci_stop_and_remove_bus_device(pdev);
48	ret = zpci_disable_device(zdev);
49	if (ret)
50		return ret;
51
52	ret = zpci_enable_device(zdev);
53	if (ret)
54		return ret;
55
56	pci_rescan_bus(zdev->bus);
57	return count;
58}
59static DEVICE_ATTR_WO(recover);
60
61static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
62				struct bin_attribute *attr, char *buf,
63				loff_t off, size_t count)
64{
65	struct device *dev = kobj_to_dev(kobj);
66	struct pci_dev *pdev = to_pci_dev(dev);
67	struct zpci_dev *zdev = get_zdev(pdev);
68
69	return memory_read_from_buffer(buf, count, &off, zdev->util_str,
70				       sizeof(zdev->util_str));
71}
72static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN);
73static struct bin_attribute *zpci_bin_attrs[] = {
74	&bin_attr_util_string,
75	NULL,
76};
77
78static struct attribute *zpci_dev_attrs[] = {
79	&dev_attr_function_id.attr,
80	&dev_attr_function_handle.attr,
81	&dev_attr_pchid.attr,
82	&dev_attr_pfgid.attr,
83	&dev_attr_pft.attr,
84	&dev_attr_vfn.attr,
85	&dev_attr_uid.attr,
86	&dev_attr_recover.attr,
87	NULL,
88};
89static struct attribute_group zpci_attr_group = {
90	.attrs = zpci_dev_attrs,
91	.bin_attrs = zpci_bin_attrs,
92};
93
94static struct attribute *pfip_attrs[] = {
95	&dev_attr_segment0.attr,
96	&dev_attr_segment1.attr,
97	&dev_attr_segment2.attr,
98	&dev_attr_segment3.attr,
99	NULL,
100};
101static struct attribute_group pfip_attr_group = {
102	.name = "pfip",
103	.attrs = pfip_attrs,
104};
105
106const struct attribute_group *zpci_attr_groups[] = {
107	&zpci_attr_group,
108	&pfip_attr_group,
109	NULL,
110};
111