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_atmindex(struct device *cdev,
  63                              struct device_attribute *attr, char *buf)
  64 {
  65         struct atm_dev *adev = to_atm_dev(cdev);
  66
  67         return sprintf(buf, "%d\n", adev->number);
  68 }
  69
  70 static ssize_t show_carrier(struct device *cdev,
  71                             struct device_attribute *attr, char *buf)
  72 {
  73         char *pos = buf;
  74         struct atm_dev *adev = to_atm_dev(cdev);
  75
  76         pos += sprintf(pos, "%d\n",
  77                        adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  78
  79         return pos - buf;
  80 }
  81
  82 static ssize_t show_link_rate(struct device *cdev,
  83                               struct device_attribute *attr, char *buf)
  84 {
  85         char *pos = buf;
  86         struct atm_dev *adev = to_atm_dev(cdev);
  87         int link_rate;
  88
  89         /* show the link rate, not the data rate */
  90         switch (adev->link_rate) {
  91         case ATM_OC3_PCR:
  92                 link_rate = 155520000;
  93                 break;
  94         case ATM_OC12_PCR:
  95                 link_rate = 622080000;
  96                 break;
  97         case ATM_25_PCR:
  98                 link_rate = 25600000;
  99                 break;
 100         default:
 101                 link_rate = adev->link_rate * 8 * 53;
 102         }
 103         pos += sprintf(pos, "%d\n", link_rate);
 104
 105         return pos - buf;
 106 }
 107
 108 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 109 static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
 110 static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL);
 111 static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
 112 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 113 static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
 114
 115 static struct device_attribute *atm_attrs[] = {
 116         &dev_attr_atmaddress,
 117         &dev_attr_address,
 118         &dev_attr_atmindex,
 119         &dev_attr_carrier,
 120         &dev_attr_type,
 121         &dev_attr_link_rate,
 122         NULL
 123 };
 124
 125
 126 static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
 127 {
 128         struct atm_dev *adev;
 129
 130         if (!cdev)
 131                 return -ENODEV;
 132
 133         adev = to_atm_dev(cdev);
 134         if (!adev)
 135                 return -ENODEV;
 136
 137         if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
 138                 return -ENOMEM;
 139
 140         return 0;
 141 }
 142
 143 static void atm_release(struct device *cdev)
 144 {
 145         struct atm_dev *adev = to_atm_dev(cdev);
 146
 147         kfree(adev);
 148 }
 149
 150 static struct class atm_class = {
 151         .name           = "atm",
 152         .dev_release    = atm_release,
 153         .dev_uevent             = atm_uevent,
 154 };
 155
 156 int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
 157 {
 158         struct device *cdev = &adev->class_dev;
 159         int i, j, err;
 160
 161         cdev->class = &atm_class;
 162         cdev->parent = parent;
 163         dev_set_drvdata(cdev, adev);
 164
 165         dev_set_name(cdev, "%s%d", adev->type, adev->number);
 166         err = device_register(cdev);
 167         if (err < 0)
 168                 return err;
 169
 170         for (i = 0; atm_attrs[i]; i++) {
 171                 err = device_create_file(cdev, atm_attrs[i]);
 172                 if (err)
 173                         goto err_out;
 174         }
 175
 176         return 0;
 177
 178 err_out:
 179         for (j = 0; j < i; j++)
 180                 device_remove_file(cdev, atm_attrs[j]);
 181         device_del(cdev);
 182         return err;
 183 }
 184
 185 void atm_unregister_sysfs(struct atm_dev *adev)
 186 {
 187         struct device *cdev = &adev->class_dev;
 188
 189         device_del(cdev);
 190 }
 191
 192 int __init atm_sysfs_init(void)
 193 {
 194         return class_register(&atm_class);
 195 }
 196
 197 void __exit atm_sysfs_exit(void)
 198 {
 199         class_unregister(&atm_class);
 200 }