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