net/atm/atm_sysfs.c

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