ia64/linux-2.6.18-xen.hg

view drivers/atm/adummy.c @ 0:831230e53067

Import 2.6.18 from kernel.org tarball.
author Ian Campbell <ian.campbell@xensource.com>
date Wed Apr 11 14:15:44 2007 +0100 (2007-04-11)
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1 /*
2 * adummy.c: a dummy ATM driver
3 */
5 #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>
23 #include <linux/atmdev.h>
24 #include <linux/atm.h>
25 #include <linux/sonet.h>
27 /* version definition */
29 #define DRV_VERSION "1.0"
31 #define DEV_LABEL "adummy"
33 #define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)
35 struct adummy_dev {
36 struct atm_dev *atm_dev;
38 struct list_head entry;
39 };
41 /* globals */
43 static LIST_HEAD(adummy_devs);
45 static int __init
46 adummy_start(struct atm_dev *dev)
47 {
48 dev->ci_range.vpi_bits = 4;
49 dev->ci_range.vci_bits = 12;
51 return 0;
52 }
54 static int
55 adummy_open(struct atm_vcc *vcc)
56 {
57 short vpi = vcc->vpi;
58 int vci = vcc->vci;
60 if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
61 return 0;
63 set_bit(ATM_VF_ADDR, &vcc->flags);
64 set_bit(ATM_VF_READY, &vcc->flags);
66 return 0;
67 }
69 static void
70 adummy_close(struct atm_vcc *vcc)
71 {
72 clear_bit(ATM_VF_READY, &vcc->flags);
73 clear_bit(ATM_VF_ADDR, &vcc->flags);
74 }
76 static int
77 adummy_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);
85 return 0;
86 }
88 static int
89 adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
90 {
91 int left = *pos;
93 if (!left--)
94 return sprintf(page, "version %s\n", DRV_VERSION);
96 return 0;
97 }
99 static 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 };
108 static int __init adummy_init(void)
109 {
110 struct atm_dev *atm_dev;
111 struct adummy_dev *adummy_dev;
112 int err = 0;
114 printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);
116 adummy_dev = (struct adummy_dev *) kmalloc(sizeof(struct adummy_dev),
117 GFP_KERNEL);
118 if (!adummy_dev) {
119 printk(KERN_ERR DEV_LABEL ": kmalloc() failed\n");
120 err = -ENOMEM;
121 goto out;
122 }
123 memset(adummy_dev, 0, sizeof(struct adummy_dev));
125 atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, NULL);
126 if (!atm_dev) {
127 printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
128 err = -ENODEV;
129 goto out_kfree;
130 }
132 adummy_dev->atm_dev = atm_dev;
133 atm_dev->dev_data = adummy_dev;
135 if (adummy_start(atm_dev)) {
136 printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
137 err = -ENODEV;
138 goto out_unregister;
139 }
141 list_add(&adummy_dev->entry, &adummy_devs);
142 out:
143 return err;
145 out_unregister:
146 atm_dev_deregister(atm_dev);
147 out_kfree:
148 kfree(adummy_dev);
149 goto out;
150 }
152 static void __exit adummy_cleanup(void)
153 {
154 struct adummy_dev *adummy_dev, *next;
156 list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
157 atm_dev_deregister(adummy_dev->atm_dev);
158 kfree(adummy_dev);
159 }
160 }
162 module_init(adummy_init);
163 module_exit(adummy_cleanup);
165 MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
166 MODULE_DESCRIPTION("dummy ATM driver");
167 MODULE_LICENSE("GPL");