net/atm/atm_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* ATM driver model support. */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/slab.h>
   6 #include <linux/init.h>
   7 #include <linux/kobject.h>
   8 #include <linux/atmdev.h>
   9 #include "common.h"
  10 #include "resources.h"
  11
  12 #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
  13
  14 static ssize_t show_type(struct device *cdev,
  15                          struct device_attribute *attr, char *buf)
  16 {
  17         struct atm_dev *adev = to_atm_dev(cdev);
  18
  19         return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
  20 }
  21
  22 static ssize_t show_address(struct device *cdev,
  23                             struct device_attribute *attr, char *buf)
  24 {
  25         struct atm_dev *adev = to_atm_dev(cdev);
  26
  27         return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
  28 }
  29
  30 static ssize_t show_atmaddress(struct device *cdev,
  31                                struct device_attribute *attr, char *buf)
  32 {
  33         unsigned long flags;
  34         struct atm_dev *adev = to_atm_dev(cdev);
  35         struct atm_dev_addr *aaddr;
  36         int count = 0;
  37
  38         spin_lock_irqsave(&adev->lock, flags);
  39         list_for_each_entry(aaddr, &adev->local, entry) {
  40                 count += scnprintf(buf + count, PAGE_SIZE - count,
  41                                    "%1phN.%2phN.%10phN.%6phN.%1phN\n",
  42                                    &aaddr->addr.sas_addr.prv[0],
  43                                    &aaddr->addr.sas_addr.prv[1],
  44                                    &aaddr->addr.sas_addr.prv[3],
  45                                    &aaddr->addr.sas_addr.prv[13],
  46                                    &aaddr->addr.sas_addr.prv[19]);
  47         }
  48         spin_unlock_irqrestore(&adev->lock, flags);
  49
  50         return count;
  51 }
  52
  53 static ssize_t show_atmindex(struct device *cdev,
  54                              struct device_attribute *attr, char *buf)
  55 {
  56         struct atm_dev *adev = to_atm_dev(cdev);
  57
  58         return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
  59 }
  60
  61 static ssize_t show_carrier(struct device *cdev,
  62                             struct device_attribute *attr, char *buf)
  63 {
  64         struct atm_dev *adev = to_atm_dev(cdev);
  65
  66         return scnprintf(buf, PAGE_SIZE, "%d\n",
  67                          adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  68 }
  69
  70 static ssize_t show_link_rate(struct device *cdev,
  71                               struct device_attribute *attr, char *buf)
  72 {
  73         struct atm_dev *adev = to_atm_dev(cdev);
  74         int link_rate;
  75
  76         /* show the link rate, not the data rate */
  77         switch (adev->link_rate) {
  78         case ATM_OC3_PCR:
  79                 link_rate = 155520000;
  80                 break;
  81         case ATM_OC12_PCR:
  82                 link_rate = 622080000;
  83                 break;
  84         case ATM_25_PCR:
  85                 link_rate = 25600000;
  86                 break;
  87         default:
  88                 link_rate = adev->link_rate * 8 * 53;
  89         }
  90         return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
  91 }
  92
  93 static DEVICE_ATTR(address, 0444, show_address, NULL);
  94 static DEVICE_ATTR(atmaddress, 0444, show_atmaddress, NULL);
  95 static DEVICE_ATTR(atmindex, 0444, show_atmindex, NULL);
  96 static DEVICE_ATTR(carrier, 0444, show_carrier, NULL);
  97 static DEVICE_ATTR(type, 0444, show_type, NULL);
  98 static DEVICE_ATTR(link_rate, 0444, show_link_rate, NULL);
  99
 100 static struct device_attribute *atm_attrs[] = {
 101         &dev_attr_atmaddress,
 102         &dev_attr_address,
 103         &dev_attr_atmindex,
 104         &dev_attr_carrier,
 105         &dev_attr_type,
 106         &dev_attr_link_rate,
 107         NULL
 108 };
 109
 110
 111 static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
 112 {
 113         struct atm_dev *adev;
 114
 115         if (!cdev)
 116                 return -ENODEV;
 117
 118         adev = to_atm_dev(cdev);
 119         if (!adev)
 120                 return -ENODEV;
 121
 122         if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
 123                 return -ENOMEM;
 124
 125         return 0;
 126 }
 127
 128 static void atm_release(struct device *cdev)
 129 {
 130         struct atm_dev *adev = to_atm_dev(cdev);
 131
 132         kfree(adev);
 133 }
 134
 135 static struct class atm_class = {
 136         .name           = "atm",
 137         .dev_release    = atm_release,
 138         .dev_uevent             = atm_uevent,
 139 };
 140
 141 int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
 142 {
 143         struct device *cdev = &adev->class_dev;
 144         int i, j, err;
 145
 146         cdev->class = &atm_class;
 147         cdev->parent = parent;
 148         dev_set_drvdata(cdev, adev);
 149
 150         dev_set_name(cdev, "%s%d", adev->type, adev->number);
 151         err = device_register(cdev);
 152         if (err < 0)
 153                 return err;
 154
 155         for (i = 0; atm_attrs[i]; i++) {
 156                 err = device_create_file(cdev, atm_attrs[i]);
 157                 if (err)
 158                         goto err_out;
 159         }
 160
 161         return 0;
 162
 163 err_out:
 164         for (j = 0; j < i; j++)
 165                 device_remove_file(cdev, atm_attrs[j]);
 166         device_del(cdev);
 167         return err;
 168 }
 169
 170 void atm_unregister_sysfs(struct atm_dev *adev)
 171 {
 172         struct device *cdev = &adev->class_dev;
 173
 174         device_del(cdev);
 175 }
 176
 177 int __init atm_sysfs_init(void)
 178 {
 179         return class_register(&atm_class);
 180 }
 181
 182 void __exit atm_sysfs_exit(void)
 183 {
 184         class_unregister(&atm_class);
 185 }