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 type_show(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 address_show(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 atmaddress_show(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 atmindex_show(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 carrier_show(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 link_rate_show(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_RO(address);
  94 static DEVICE_ATTR_RO(atmaddress);
  95 static DEVICE_ATTR_RO(atmindex);
  96 static DEVICE_ATTR_RO(carrier);
  97 static DEVICE_ATTR_RO(type);
  98 static DEVICE_ATTR_RO(link_rate);
  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(const struct device *cdev, struct kobj_uevent_env *env)
 112 {
 113         const struct atm_dev *adev;
 114
 115         if (!cdev)
 116                 return -ENODEV;
 117
 118         adev = to_atm_dev(cdev);
 119
 120         if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
 121                 return -ENOMEM;
 122
 123         return 0;
 124 }
 125
 126 static void atm_release(struct device *cdev)
 127 {
 128         struct atm_dev *adev = to_atm_dev(cdev);
 129
 130         kfree(adev);
 131 }
 132
 133 static struct class atm_class = {
 134         .name           = "atm",
 135         .dev_release    = atm_release,
 136         .dev_uevent             = atm_uevent,
 137 };
 138
 139 int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
 140 {
 141         struct device *cdev = &adev->class_dev;
 142         int i, j, err;
 143
 144         cdev->class = &atm_class;
 145         cdev->parent = parent;
 146         dev_set_drvdata(cdev, adev);
 147
 148         dev_set_name(cdev, "%s%d", adev->type, adev->number);
 149         err = device_register(cdev);
 150         if (err < 0)
 151                 return err;
 152
 153         for (i = 0; atm_attrs[i]; i++) {
 154                 err = device_create_file(cdev, atm_attrs[i]);
 155                 if (err)
 156                         goto err_out;
 157         }
 158
 159         return 0;
 160
 161 err_out:
 162         for (j = 0; j < i; j++)
 163                 device_remove_file(cdev, atm_attrs[j]);
 164         device_del(cdev);
 165         return err;
 166 }
 167
 168 void atm_unregister_sysfs(struct atm_dev *adev)
 169 {
 170         struct device *cdev = &adev->class_dev;
 171
 172         device_del(cdev);
 173 }
 174
 175 int __init atm_sysfs_init(void)
 176 {
 177         return class_register(&atm_class);
 178 }
 179
 180 void __exit atm_sysfs_exit(void)
 181 {
 182         class_unregister(&atm_class);
 183 }