[deliverable/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/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 = kzalloc(sizeof(struct adummy_dev),
						   GFP_KERNEL);
	if (!adummy_dev) {
		printk(KERN_ERR DEV_LABEL ": kzalloc() failed\n");
		err = -ENOMEM;
		goto out;
	}
	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 <chas@cmf.nrl.navy.mil>");
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>
fb296449 CW	16	#include <linux/timer.h>
	17	#include <linux/interrupt.h>
	18	#include <asm/io.h>
	19	#include <asm/byteorder.h>
	20	#include <asm/uaccess.h>
	21
	22	#include <linux/atmdev.h>
	23	#include <linux/atm.h>
	24	#include <linux/sonet.h>
	25
	26	/* version definition */
	27
	28	#define DRV_VERSION "1.0"
	29
	30	#define DEV_LABEL "adummy"
	31
	32	#define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)
	33
	34	struct adummy_dev {
	35	struct atm_dev *atm_dev;
	36
	37	struct list_head entry;
	38	};
	39
	40	/* globals */
	41
	42	static LIST_HEAD(adummy_devs);
	43
	44	static int __init
	45	adummy_start(struct atm_dev *dev)
	46	{
	47	dev->ci_range.vpi_bits = 4;
	48	dev->ci_range.vci_bits = 12;
	49
	50	return 0;
	51	}
	52
	53	static int
	54	adummy_open(struct atm_vcc *vcc)
	55	{
	56	short vpi = vcc->vpi;
	57	int vci = vcc->vci;
	58
	59	if (vci == ATM_VCI_UNSPEC \|\| vpi == ATM_VPI_UNSPEC)
	60	return 0;
	61
	62	set_bit(ATM_VF_ADDR, &vcc->flags);
	63	set_bit(ATM_VF_READY, &vcc->flags);
	64
	65	return 0;
	66	}
	67
	68	static void
	69	adummy_close(struct atm_vcc *vcc)
	70	{
	71	clear_bit(ATM_VF_READY, &vcc->flags);
	72	clear_bit(ATM_VF_ADDR, &vcc->flags);
	73	}
	74
	75	static int
	76	adummy_send(struct atm_vcc vcc, struct sk_buff skb)
	77	{
	78	if (vcc->pop)
	79	vcc->pop(vcc, skb);
80	else
81	dev_kfree_skb_any(skb);
82	atomic_inc(&vcc->stats->tx);
83
84	return 0;
85	}
86
87	static int
88	adummy_proc_read(struct atm_dev dev, loff_t pos, char *page)
89	{
90	int left = *pos;
91
92	if (!left--)
93	return sprintf(page, "version %s\n", DRV_VERSION);
94
95	return 0;
96	}
97
98	static struct atmdev_ops adummy_ops =
99	{
100	.open = adummy_open,
101	.close = adummy_close,
102	.send = adummy_send,
103	.proc_read = adummy_proc_read,
104	.owner = THIS_MODULE
105	};
106
107	static int __init adummy_init(void)
108	{
109	struct atm_dev *atm_dev;
110	struct adummy_dev *adummy_dev;
111	int err = 0;
112
113	printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);
114
0c1cca1d	115	adummy_dev = kzalloc(sizeof(struct adummy_dev),
fb296449 CW	116	GFP_KERNEL);
fb296449 CW	117	if (!adummy_dev) {
0c1cca1d	118	printk(KERN_ERR DEV_LABEL ": kzalloc() failed\n");
fb296449 CW	119	err = -ENOMEM;
	120	goto out;
	121	}
7877327d	122	atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, NULL);
fb296449 CW	123	if (!atm_dev) {
	124	printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
	125	err = -ENODEV;
	126	goto out_kfree;
	127	}
	128
	129	adummy_dev->atm_dev = atm_dev;
	130	atm_dev->dev_data = adummy_dev;
	131
	132	if (adummy_start(atm_dev)) {
	133	printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
	134	err = -ENODEV;
	135	goto out_unregister;
	136	}
	137
	138	list_add(&adummy_dev->entry, &adummy_devs);
	139	out:
	140	return err;
	141
	142	out_unregister:
	143	atm_dev_deregister(atm_dev);
	144	out_kfree:
	145	kfree(adummy_dev);
	146	goto out;
	147	}
	148
	149	static void __exit adummy_cleanup(void)
	150	{
	151	struct adummy_dev adummy_dev, next;
	152
	153	list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
	154	atm_dev_deregister(adummy_dev->atm_dev);
	155	kfree(adummy_dev);
	156	}
	157	}
	158
	159	module_init(adummy_init);
	160	module_exit(adummy_cleanup);
	161
	162	MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
	163	MODULE_DESCRIPTION("dummy ATM driver");
	164	MODULE_LICENSE("GPL");