tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* ATM driver model support. */
3
4#include <linux/kernel.h>
5#include <linux/slab.h>
6#include <linux/init.h>
7#include <linux/kobject.h>
8#include <linux/atmdev.h>
9#include "common.h"
10#include "resources.h"
11
12#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
13
14static ssize_t show_type(struct device *cdev,
15 struct device_attribute *attr, char *buf)
16{
17 struct atm_dev *adev = to_atm_dev(cdev);
18
19 return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
20}
21
22static ssize_t show_address(struct device *cdev,
23 struct device_attribute *attr, char *buf)
24{
25 struct atm_dev *adev = to_atm_dev(cdev);
26
27 return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
28}
29
30static ssize_t show_atmaddress(struct device *cdev,
31 struct device_attribute *attr, char *buf)
32{
33 unsigned long flags;
34 struct atm_dev *adev = to_atm_dev(cdev);
35 struct atm_dev_addr *aaddr;
36 int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
37 int i, j, count = 0;
38
39 spin_lock_irqsave(&adev->lock, flags);
40 list_for_each_entry(aaddr, &adev->local, entry) {
41 for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
42 if (j == *fmt) {
43 count += scnprintf(buf + count,
44 PAGE_SIZE - count, ".");
45 ++fmt;
46 j = 0;
47 }
48 count += scnprintf(buf + count,
49 PAGE_SIZE - count, "%02x",
50 aaddr->addr.sas_addr.prv[i]);
51 }
52 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
53 }
54 spin_unlock_irqrestore(&adev->lock, flags);
55
56 return count;
57}
58
59static ssize_t show_atmindex(struct device *cdev,
60 struct device_attribute *attr, char *buf)
61{
62 struct atm_dev *adev = to_atm_dev(cdev);
63
64 return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
65}
66
67static ssize_t show_carrier(struct device *cdev,
68 struct device_attribute *attr, char *buf)
69{
70 struct atm_dev *adev = to_atm_dev(cdev);
71
72 return scnprintf(buf, PAGE_SIZE, "%d\n",
73 adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
74}
75
76static ssize_t show_link_rate(struct device *cdev,
77 struct device_attribute *attr, char *buf)
78{
79 struct atm_dev *adev = to_atm_dev(cdev);
80 int link_rate;
81
82 /* show the link rate, not the data rate */
83 switch (adev->link_rate) {
84 case ATM_OC3_PCR:
85 link_rate = 155520000;
86 break;
87 case ATM_OC12_PCR:
88 link_rate = 622080000;
89 break;
90 case ATM_25_PCR:
91 link_rate = 25600000;
92 break;
93 default:
94 link_rate = adev->link_rate * 8 * 53;
95 }
96 return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
97}
98
99static DEVICE_ATTR(address, 0444, show_address, NULL);
100static DEVICE_ATTR(atmaddress, 0444, show_atmaddress, NULL);
101static DEVICE_ATTR(atmindex, 0444, show_atmindex, NULL);
102static DEVICE_ATTR(carrier, 0444, show_carrier, NULL);
103static DEVICE_ATTR(type, 0444, show_type, NULL);
104static DEVICE_ATTR(link_rate, 0444, show_link_rate, NULL);
105
106static struct device_attribute *atm_attrs[] = {
107 &dev_attr_atmaddress,
108 &dev_attr_address,
109 &dev_attr_atmindex,
110 &dev_attr_carrier,
111 &dev_attr_type,
112 &dev_attr_link_rate,
113 NULL
114};
115
116
117static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
118{
119 struct atm_dev *adev;
120
121 if (!cdev)
122 return -ENODEV;
123
124 adev = to_atm_dev(cdev);
125 if (!adev)
126 return -ENODEV;
127
128 if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
129 return -ENOMEM;
130
131 return 0;
132}
133
134static void atm_release(struct device *cdev)
135{
136 struct atm_dev *adev = to_atm_dev(cdev);
137
138 kfree(adev);
139}
140
141static struct class atm_class = {
142 .name = "atm",
143 .dev_release = atm_release,
144 .dev_uevent = atm_uevent,
145};
146
147int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
148{
149 struct device *cdev = &adev->class_dev;
150 int i, j, err;
151
152 cdev->class = &atm_class;
153 cdev->parent = parent;
154 dev_set_drvdata(cdev, adev);
155
156 dev_set_name(cdev, "%s%d", adev->type, adev->number);
157 err = device_register(cdev);
158 if (err < 0)
159 return err;
160
161 for (i = 0; atm_attrs[i]; i++) {
162 err = device_create_file(cdev, atm_attrs[i]);
163 if (err)
164 goto err_out;
165 }
166
167 return 0;
168
169err_out:
170 for (j = 0; j < i; j++)
171 device_remove_file(cdev, atm_attrs[j]);
172 device_del(cdev);
173 return err;
174}
175
176void atm_unregister_sysfs(struct atm_dev *adev)
177{
178 struct device *cdev = &adev->class_dev;
179
180 device_del(cdev);
181}
182
183int __init atm_sysfs_init(void)
184{
185 return class_register(&atm_class);
186}
187
188void __exit atm_sysfs_exit(void)
189{
190 class_unregister(&atm_class);
191}