diff options
Diffstat (limited to 'net/atm/atm_sysfs.c')
| -rw-r--r-- | net/atm/atm_sysfs.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c new file mode 100644 index 000000000..aa1b57161 --- /dev/null +++ b/net/atm/atm_sysfs.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0 +/* ATM driver model support. */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/kobject.h> +#include <linux/atmdev.h> +#include "common.h" +#include "resources.h" + +#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev) + +static ssize_t show_type(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type); +} + +static ssize_t show_address(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi); +} + +static ssize_t show_atmaddress(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + unsigned long flags; + struct atm_dev *adev = to_atm_dev(cdev); + struct atm_dev_addr *aaddr; + int count = 0; + + spin_lock_irqsave(&adev->lock, flags); + list_for_each_entry(aaddr, &adev->local, entry) { + count += scnprintf(buf + count, PAGE_SIZE - count, + "%1phN.%2phN.%10phN.%6phN.%1phN\n", + &aaddr->addr.sas_addr.prv[0], + &aaddr->addr.sas_addr.prv[1], + &aaddr->addr.sas_addr.prv[3], + &aaddr->addr.sas_addr.prv[13], + &aaddr->addr.sas_addr.prv[19]); + } + spin_unlock_irqrestore(&adev->lock, flags); + + return count; +} + +static ssize_t show_atmindex(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number); +} + +static ssize_t show_carrier(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + return scnprintf(buf, PAGE_SIZE, "%d\n", + adev->signal == ATM_PHY_SIG_LOST ? 0 : 1); +} + +static ssize_t show_link_rate(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + int link_rate; + + /* show the link rate, not the data rate */ + switch (adev->link_rate) { + case ATM_OC3_PCR: + link_rate = 155520000; + break; + case ATM_OC12_PCR: + link_rate = 622080000; + break; + case ATM_25_PCR: + link_rate = 25600000; + break; + default: + link_rate = adev->link_rate * 8 * 53; + } + return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate); +} + +static DEVICE_ATTR(address, 0444, show_address, NULL); +static DEVICE_ATTR(atmaddress, 0444, show_atmaddress, NULL); +static DEVICE_ATTR(atmindex, 0444, show_atmindex, NULL); +static DEVICE_ATTR(carrier, 0444, show_carrier, NULL); +static DEVICE_ATTR(type, 0444, show_type, NULL); +static DEVICE_ATTR(link_rate, 0444, show_link_rate, NULL); + +static struct device_attribute *atm_attrs[] = { + &dev_attr_atmaddress, + &dev_attr_address, + &dev_attr_atmindex, + &dev_attr_carrier, + &dev_attr_type, + &dev_attr_link_rate, + NULL +}; + + +static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env) +{ + struct atm_dev *adev; + + if (!cdev) + return -ENODEV; + + adev = to_atm_dev(cdev); + if (!adev) + return -ENODEV; + + if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number)) + return -ENOMEM; + + return 0; +} + +static void atm_release(struct device *cdev) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + kfree(adev); +} + +static struct class atm_class = { + .name = "atm", + .dev_release = atm_release, + .dev_uevent = atm_uevent, +}; + +int atm_register_sysfs(struct atm_dev *adev, struct device *parent) +{ + struct device *cdev = &adev->class_dev; + int i, j, err; + + cdev->class = &atm_class; + cdev->parent = parent; + dev_set_drvdata(cdev, adev); + + dev_set_name(cdev, "%s%d", adev->type, adev->number); + err = device_register(cdev); + if (err < 0) + return err; + + for (i = 0; atm_attrs[i]; i++) { + err = device_create_file(cdev, atm_attrs[i]); + if (err) + goto err_out; + } + + return 0; + +err_out: + for (j = 0; j < i; j++) + device_remove_file(cdev, atm_attrs[j]); + device_del(cdev); + return err; +} + +void atm_unregister_sysfs(struct atm_dev *adev) +{ + struct device *cdev = &adev->class_dev; + + device_del(cdev); +} + +int __init atm_sysfs_init(void) +{ + return class_register(&atm_class); +} + +void __exit atm_sysfs_exit(void) +{ + class_unregister(&atm_class); +} |