net/atm/atm_sysfs.c

   1 /* ATM driver model support. */
   2
   3 #include <linux/kernel.h>
   4 #include <linux/slab.h>
   5 #include <linux/init.h>
   6 #include <linux/kobject.h>
   7 #include <linux/atmdev.h>
   8 #include "common.h"
   9 #include "resources.h"
  10
  11 #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
  12
  13 static ssize_t show_type(struct device *cdev,
  14                          struct device_attribute *attr, char *buf)
  15 {
  16         struct atm_dev *adev = to_atm_dev(cdev);
  17         return sprintf(buf, "%s\n", adev->type);
  18 }
  19
  20 static ssize_t show_address(struct device *cdev,
  21                             struct device_attribute *attr, char *buf)
  22 {
  23         char *pos = buf;
  24         struct atm_dev *adev = to_atm_dev(cdev);
  25         int i;
  26
  27         for (i = 0; i < (ESI_LEN - 1); i++)
  28                 pos += sprintf(pos, "%02x:", adev->esi[i]);
  29         pos += sprintf(pos, "%02x\n", adev->esi[i]);
  30
  31         return pos - buf;
  32 }
  33
  34 static ssize_t show_atmaddress(struct device *cdev,
  35                                struct device_attribute *attr, char *buf)
  36 {
  37         unsigned long flags;
  38         char *pos = buf;
  39         struct atm_dev *adev = to_atm_dev(cdev);
  40         struct atm_dev_addr *aaddr;
  41         int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
  42         int i, j;
  43
  44         spin_lock_irqsave(&adev->lock, flags);
  45         list_for_each_entry(aaddr, &adev->local, entry) {
  46                 for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
  47                         if (j == *fmt) {
  48                                 pos += sprintf(pos, ".");
  49                                 ++fmt;
  50                                 j = 0;
  51                         }
  52                         pos += sprintf(pos, "%02x",
  53                                        aaddr->addr.sas_addr.prv[i]);
  54                 }
  55                 pos += sprintf(pos, "\n");
  56         }
  57         spin_unlock_irqrestore(&adev->lock, flags);
  58
  59         return pos - buf;
  60 }
  61
  62 static ssize_t show_carrier(struct device *cdev,
  63                             struct device_attribute *attr, char *buf)
  64 {
  65         char *pos = buf;
  66         struct atm_dev *adev = to_atm_dev(cdev);
  67
  68         pos += sprintf(pos, "%d\n",
  69                        adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  70
  71         return pos - buf;
  72 }
  73
  74 static ssize_t show_link_rate(struct device *cdev,
  75                               struct device_attribute *attr, char *buf)
  76 {
  77         char *pos = buf;
  78         struct atm_dev *adev = to_atm_dev(cdev);
  79         int link_rate;
  80
  81         /* show the link rate, not the data rate */
  82         switch (adev->link_rate) {
  83         case ATM_OC3_PCR:
  84                 link_rate = 155520000;
  85                 break;
  86         case ATM_OC12_PCR:
  87                 link_rate = 622080000;
  88                 break;
  89         case ATM_25_PCR:
  90                 link_rate = 25600000;
  91                 break;
  92         default:
  93                 link_rate = adev->link_rate * 8 * 53;
  94         }
  95         pos += sprintf(pos, "%d\n", link_rate);
  96
  97         return pos - buf;
  98 }
  99
 100 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 101 static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
 102 static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
 103 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 104 static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
 105
 106 static struct device_attribute *atm_attrs[] = {
 107         &dev_attr_atmaddress,
 108         &dev_attr_address,
 109         &dev_attr_carrier,
 110         &dev_attr_type,
 111         &dev_attr_link_rate,
 112         NULL
 113 };
 114
 115
 116 static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
 117 {
 118         struct atm_dev *adev;
 119
 120         if (!cdev)
 121                 return -ENODEV;
 122
 123         adev = to_atm_dev(cdev);
 124         if (!adev)
 125                 return -ENODEV;
 126
 127         if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
 128                 return -ENOMEM;
 129
 130         return 0;
 131 }
 132
 133 static void atm_release(struct device *cdev)
 134 {
 135         struct atm_dev *adev = to_atm_dev(cdev);
 136
 137         kfree(adev);
 138 }
 139
 140 static struct class atm_class = {
 141         .name           = "atm",
 142         .dev_release    = atm_release,
 143         .dev_uevent             = atm_uevent,
 144 };
 145
 146 int atm_register_sysfs(struct atm_dev *adev)
 147 {
 148         struct device *cdev = &adev->class_dev;
 149         int i, j, err;
 150
 151         cdev->class = &atm_class;
 152         dev_set_drvdata(cdev, adev);
 153
 154         dev_set_name(cdev, "%s%d", adev->type, adev->number);
 155         err = device_register(cdev);
 156         if (err < 0)
 157                 return err;
 158
 159         for (i = 0; atm_attrs[i]; i++) {
 160                 err = device_create_file(cdev, atm_attrs[i]);
 161                 if (err)
 162                         goto err_out;
 163         }
 164
 165         return 0;
 166
 167 err_out:
 168         for (j = 0; j < i; j++)
 169                 device_remove_file(cdev, atm_attrs[j]);
 170         device_del(cdev);
 171         return err;
 172 }
 173
 174 void atm_unregister_sysfs(struct atm_dev *adev)
 175 {
 176         struct device *cdev = &adev->class_dev;
 177
 178         device_del(cdev);
 179 }
 180
 181 int __init atm_sysfs_init(void)
 182 {
 183         return class_register(&atm_class);
 184 }
 185
 186 void __exit atm_sysfs_exit(void)
 187 {
 188         class_unregister(&atm_class);
 189 }