[linux.git] / drivers / atm / adummy.c

/*
 * adummy.c: a dummy ATM driver
 */

#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/pci.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>

#include <linux/atmdev.h>
#include <linux/atm.h>
#include <linux/sonet.h>

/* version definition */

#define DRV_VERSION "1.0"

#define DEV_LABEL "adummy"

#define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)

struct adummy_dev {
	struct atm_dev *atm_dev;

	struct list_head entry;
};

/* globals */

static LIST_HEAD(adummy_devs);

static int __init
adummy_start(struct atm_dev *dev)
{
	dev->ci_range.vpi_bits = 4;
	dev->ci_range.vci_bits = 12;

	return 0;
}

static int
adummy_open(struct atm_vcc *vcc)
{
	short vpi = vcc->vpi;
	int vci = vcc->vci;

	if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
		return 0;

	set_bit(ATM_VF_ADDR, &vcc->flags);
	set_bit(ATM_VF_READY, &vcc->flags);

	return 0;
}

static void
adummy_close(struct atm_vcc *vcc)
{
	clear_bit(ATM_VF_READY, &vcc->flags);
	clear_bit(ATM_VF_ADDR, &vcc->flags);
}

static int
adummy_send(struct atm_vcc *vcc, struct sk_buff *skb)
{
	if (vcc->pop)
		vcc->pop(vcc, skb);
	else
		dev_kfree_skb_any(skb);
	atomic_inc(&vcc->stats->tx);

	return 0;
}

static int
adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
{
	int left = *pos;

	if (!left--)
		return sprintf(page, "version %s\n", DRV_VERSION);

	return 0;
}

static struct atmdev_ops adummy_ops =
{
	.open =		adummy_open,
	.close =	adummy_close,	
	.send =		adummy_send,
	.proc_read =	adummy_proc_read,
	.owner =	THIS_MODULE
};

static int __init adummy_init(void)
{
	struct atm_dev *atm_dev;
	struct adummy_dev *adummy_dev;
	int err = 0;

	printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);

	adummy_dev = (struct adummy_dev *) kmalloc(sizeof(struct adummy_dev),
						   GFP_KERNEL);
	if (!adummy_dev) {
		printk(KERN_ERR DEV_LABEL ": kmalloc() failed\n");
		err = -ENOMEM;
		goto out;
	}
	memset(adummy_dev, 0, sizeof(struct adummy_dev));

	atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, NULL);
	if (!atm_dev) {
		printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
		err = -ENODEV;
		goto out_kfree;
	}

	adummy_dev->atm_dev = atm_dev;
	atm_dev->dev_data = adummy_dev;

	if (adummy_start(atm_dev)) {
		printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
		err = -ENODEV;
		goto out_unregister;
	}

	list_add(&adummy_dev->entry, &adummy_devs);
out:
	return err;

out_unregister:
	atm_dev_deregister(atm_dev);
out_kfree:
	kfree(adummy_dev);
	goto out;
}

static void __exit adummy_cleanup(void)
{
	struct adummy_dev *adummy_dev, *next;

	list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
		atm_dev_deregister(adummy_dev->atm_dev);
		kfree(adummy_dev);
	}
}

module_init(adummy_init);
module_exit(adummy_cleanup);

MODULE_AUTHOR("chas williams <[email protected]>");
MODULE_DESCRIPTION("dummy ATM driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
fb296449 CW	1	/*
	2	* adummy.c: a dummy ATM driver
	3	*/
	4
fb296449 CW	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>
	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
	35	struct adummy_dev {
	36	struct atm_dev *atm_dev;
	37
	38	struct list_head entry;
	39	};
	40
	41	/* globals */
	42
	43	static LIST_HEAD(adummy_devs);
	44
	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;
	50
	51	return 0;
	52	}
	53
	54	static int
	55	adummy_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
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	}
75
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);
84
85	return 0;
86	}
87
88	static int
89	adummy_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
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	};
107
108	static 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
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));
124
7877327d	125	atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, NULL);
fb296449 CW	126	if (!atm_dev) {
	127	printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
	128	err = -ENODEV;
	129	goto out_kfree;
	130	}
	131
	132	adummy_dev->atm_dev = atm_dev;
	133	atm_dev->dev_data = adummy_dev;
	134
	135	if (adummy_start(atm_dev)) {
	136	printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
	137	err = -ENODEV;
	138	goto out_unregister;
	139	}
	140
	141	list_add(&adummy_dev->entry, &adummy_devs);
	142	out:
	143	return err;
	144
	145	out_unregister:
	146	atm_dev_deregister(atm_dev);
	147	out_kfree:
	148	kfree(adummy_dev);
	149	goto out;
	150	}
	151
	152	static void __exit adummy_cleanup(void)
	153	{
	154	struct adummy_dev adummy_dev, next;
	155
	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	}
	161
	162	module_init(adummy_init);
	163	module_exit(adummy_cleanup);
	164
	165	MODULE_AUTHOR("chas williams <[email protected]>");
	166	MODULE_DESCRIPTION("dummy ATM driver");
	167	MODULE_LICENSE("GPL");