net/atm/atm_sysfs.c

   1 /* ATM driver model support. */
   2
   3 #include <linux/config.h>
   4 #include <linux/kernel.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 class_device *cdev, 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 class_device *cdev, char *buf)
  20 {
  21         char *pos = buf;
  22         struct atm_dev *adev = to_atm_dev(cdev);
  23         int i;
  24
  25         for (i = 0; i < (ESI_LEN - 1); i++)
  26                 pos += sprintf(pos, "%02x:", adev->esi[i]);
  27         pos += sprintf(pos, "%02x\n", adev->esi[i]);
  28
  29         return pos - buf;
  30 }
  31
  32 static ssize_t show_atmaddress(struct class_device *cdev, char *buf)
  33 {
  34         unsigned long flags;
  35         char *pos = buf;
  36         struct atm_dev *adev = to_atm_dev(cdev);
  37         struct atm_dev_addr *aaddr;
  38         int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
  39         int i, j;
  40
  41         spin_lock_irqsave(&adev->lock, flags);
  42         list_for_each_entry(aaddr, &adev->local, entry) {
  43                 for(i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
  44                         if (j == *fmt) {
  45                                 pos += sprintf(pos, ".");
  46                                 ++fmt;
  47                                 j = 0;
  48                         }
  49                         pos += sprintf(pos, "%02x", aaddr->addr.sas_addr.prv[i]);
  50                 }
  51                 pos += sprintf(pos, "\n");
  52         }
  53         spin_unlock_irqrestore(&adev->lock, flags);
  54
  55         return pos - buf;
  56 }
  57
  58 static ssize_t show_carrier(struct class_device *cdev, char *buf)
  59 {
  60         char *pos = buf;
  61         struct atm_dev *adev = to_atm_dev(cdev);
  62
  63         pos += sprintf(pos, "%d\n",
  64                        adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  65
  66         return pos - buf;
  67 }
  68
  69 static ssize_t show_link_rate(struct class_device *cdev, char *buf)
  70 {
  71         char *pos = buf;
  72         struct atm_dev *adev = to_atm_dev(cdev);
  73         int link_rate;
  74
  75         /* show the link rate, not the data rate */
  76         switch (adev->link_rate) {
  77                 case ATM_OC3_PCR:
  78                         link_rate = 155520000;
  79                         break;
  80                 case ATM_OC12_PCR:
  81                         link_rate = 622080000;
  82                         break;
  83                 case ATM_25_PCR:
  84                         link_rate = 25600000;
  85                         break;
  86                 default:
  87                         link_rate = adev->link_rate * 8 * 53;
  88         }
  89         pos += sprintf(pos, "%d\n", link_rate);
  90
  91         return pos - buf;
  92 }
  93
  94 static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
  95 static CLASS_DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
  96 static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
  97 static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
  98 static CLASS_DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
  99
 100 static struct class_device_attribute *atm_attrs[] = {
 101         &class_device_attr_atmaddress,
 102         &class_device_attr_address,
 103         &class_device_attr_carrier,
 104         &class_device_attr_type,
 105         &class_device_attr_link_rate,
 106         NULL
 107 };
 108
 109 static int atm_uevent(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
 110 {
 111         struct atm_dev *adev;
 112         int i = 0, len = 0;
 113
 114         if (!cdev)
 115                 return -ENODEV;
 116
 117         adev = to_atm_dev(cdev);
 118         if (!adev)
 119                 return -ENODEV;
 120
 121         if (add_uevent_var(envp, num_envp, &i, buf, size, &len,
 122                            "NAME=%s%d", adev->type, adev->number))
 123                 return -ENOMEM;
 124
 125         envp[i] = NULL;
 126         return 0;
 127 }
 128
 129 static void atm_release(struct class_device *cdev)
 130 {
 131         struct atm_dev *adev = to_atm_dev(cdev);
 132
 133         kfree(adev);
 134 }
 135
 136 static struct class atm_class = {
 137         .name           = "atm",
 138         .release        = atm_release,
 139         .uevent         = atm_uevent,
 140 };
 141
 142 int atm_register_sysfs(struct atm_dev *adev)
 143 {
 144         struct class_device *cdev = &adev->class_dev;
 145         int i, err;
 146
 147         cdev->class = &atm_class;
 148         class_set_devdata(cdev, adev);
 149
 150         snprintf(cdev->class_id, BUS_ID_SIZE, "%s%d", adev->type, adev->number);
 151         err = class_device_register(cdev);
 152         if (err < 0)
 153                 return err;
 154
 155         for (i = 0; atm_attrs[i]; i++)
 156                 class_device_create_file(cdev, atm_attrs[i]);
 157
 158         return 0;
 159 }
 160
 161 void atm_unregister_sysfs(struct atm_dev *adev)
 162 {
 163         struct class_device *cdev = &adev->class_dev;
 164
 165         class_device_del(cdev);
 166 }
 167
 168 int __init atm_sysfs_init(void)
 169 {
 170         return class_register(&atm_class);
 171 }
 172
 173 void __exit atm_sysfs_exit(void)
 174 {
 175         class_unregister(&atm_class);
 176 }