diff options
| -rw-r--r-- | drivers/atm/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/atm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/atm/adummy.c | 168 |
3 files changed, 176 insertions, 0 deletions
diff --git a/drivers/atm/Kconfig b/drivers/atm/Kconfig index 489de81..01a9f1c 100644 --- a/drivers/atm/Kconfig +++ b/drivers/atm/Kconfig @@ -5,6 +5,13 @@ menu "ATM drivers" depends on NETDEVICES && ATM +config ATM_DUMMY + tristate "Dummy ATM driver" + depends on ATM + help + Dummy ATM driver. Useful for proxy signalling, testing, + and development. If unsure, say N. + config ATM_TCP tristate "ATM over TCP" depends on INET && ATM diff --git a/drivers/atm/Makefile b/drivers/atm/Makefile index 5b77188..b5077ce 100644 --- a/drivers/atm/Makefile +++ b/drivers/atm/Makefile @@ -31,6 +31,7 @@ ifeq ($(CONFIG_ATM_IDT77252_USE_SUNI),y) obj-$(CONFIG_ATM_IDT77252) += suni.o endif +obj-$(CONFIG_ATM_DUMMY) += adummy.o obj-$(CONFIG_ATM_TCP) += atmtcp.o obj-$(CONFIG_ATM_FIRESTREAM) += firestream.o obj-$(CONFIG_ATM_LANAI) += lanai.o diff --git a/drivers/atm/adummy.c b/drivers/atm/adummy.c new file mode 100644 index 0000000..d15c194 --- /dev/null +++ b/drivers/atm/adummy.c @@ -0,0 +1,168 @@ +/* + * adummy.c: a dummy ATM driver + */ + +#include <linux/config.h> +#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, 0); + 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"); |