blob: ac2c10822be07c41e5f3995dee1f260099ce3bc2 [file] [log] [blame]
Chas Williamsfb2964492005-11-29 16:17:11 -08001/*
2 * adummy.c: a dummy ATM driver
3 */
4
Chas Williamsfb2964492005-11-29 16:17:11 -08005#include <linux/module.h>
6#include <linux/version.h>
7#include <linux/kernel.h>
8#include <linux/skbuff.h>
9#include <linux/pci.h>
10#include <linux/errno.h>
11#include <linux/types.h>
12#include <linux/string.h>
13#include <linux/delay.h>
14#include <linux/init.h>
15#include <linux/mm.h>
16#include <linux/sched.h>
17#include <linux/timer.h>
18#include <linux/interrupt.h>
19#include <asm/io.h>
20#include <asm/byteorder.h>
21#include <asm/uaccess.h>
22
23#include <linux/atmdev.h>
24#include <linux/atm.h>
25#include <linux/sonet.h>
26
27/* version definition */
28
29#define DRV_VERSION "1.0"
30
31#define DEV_LABEL "adummy"
32
33#define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)
34
35struct adummy_dev {
36 struct atm_dev *atm_dev;
37
38 struct list_head entry;
39};
40
41/* globals */
42
43static LIST_HEAD(adummy_devs);
44
45static int __init
46adummy_start(struct atm_dev *dev)
47{
48 dev->ci_range.vpi_bits = 4;
49 dev->ci_range.vci_bits = 12;
50
51 return 0;
52}
53
54static int
55adummy_open(struct atm_vcc *vcc)
56{
57 short vpi = vcc->vpi;
58 int vci = vcc->vci;
59
60 if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
61 return 0;
62
63 set_bit(ATM_VF_ADDR, &vcc->flags);
64 set_bit(ATM_VF_READY, &vcc->flags);
65
66 return 0;
67}
68
69static void
70adummy_close(struct atm_vcc *vcc)
71{
72 clear_bit(ATM_VF_READY, &vcc->flags);
73 clear_bit(ATM_VF_ADDR, &vcc->flags);
74}
75
76static int
77adummy_send(struct atm_vcc *vcc, struct sk_buff *skb)
78{
79 if (vcc->pop)
80 vcc->pop(vcc, skb);
81 else
82 dev_kfree_skb_any(skb);
83 atomic_inc(&vcc->stats->tx);
84
85 return 0;
86}
87
88static int
89adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
90{
91 int left = *pos;
92
93 if (!left--)
94 return sprintf(page, "version %s\n", DRV_VERSION);
95
96 return 0;
97}
98
99static struct atmdev_ops adummy_ops =
100{
101 .open = adummy_open,
102 .close = adummy_close,
103 .send = adummy_send,
104 .proc_read = adummy_proc_read,
105 .owner = THIS_MODULE
106};
107
108static int __init adummy_init(void)
109{
110 struct atm_dev *atm_dev;
111 struct adummy_dev *adummy_dev;
112 int err = 0;
113
114 printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);
115
Om Narasimhan0c1cca12006-10-03 16:27:18 -0700116 adummy_dev = kzalloc(sizeof(struct adummy_dev),
Chas Williamsfb2964492005-11-29 16:17:11 -0800117 GFP_KERNEL);
118 if (!adummy_dev) {
Om Narasimhan0c1cca12006-10-03 16:27:18 -0700119 printk(KERN_ERR DEV_LABEL ": kzalloc() failed\n");
Chas Williamsfb2964492005-11-29 16:17:11 -0800120 err = -ENOMEM;
121 goto out;
122 }
Al Viro78773272005-12-15 09:18:55 +0000123 atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, NULL);
Chas Williamsfb2964492005-11-29 16:17:11 -0800124 if (!atm_dev) {
125 printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
126 err = -ENODEV;
127 goto out_kfree;
128 }
129
130 adummy_dev->atm_dev = atm_dev;
131 atm_dev->dev_data = adummy_dev;
132
133 if (adummy_start(atm_dev)) {
134 printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
135 err = -ENODEV;
136 goto out_unregister;
137 }
138
139 list_add(&adummy_dev->entry, &adummy_devs);
140out:
141 return err;
142
143out_unregister:
144 atm_dev_deregister(atm_dev);
145out_kfree:
146 kfree(adummy_dev);
147 goto out;
148}
149
150static void __exit adummy_cleanup(void)
151{
152 struct adummy_dev *adummy_dev, *next;
153
154 list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
155 atm_dev_deregister(adummy_dev->atm_dev);
156 kfree(adummy_dev);
157 }
158}
159
160module_init(adummy_init);
161module_exit(adummy_cleanup);
162
163MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
164MODULE_DESCRIPTION("dummy ATM driver");
165MODULE_LICENSE("GPL");