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
  18         return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
  19 }
  20
  21 static ssize_t show_address(struct device *cdev,
  22                             struct device_attribute *attr, char *buf)
  23 {
  24         struct atm_dev *adev = to_atm_dev(cdev);
  25
  26         return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
  27 }
  28
  29 static ssize_t show_atmaddress(struct device *cdev,
  30                                struct device_attribute *attr, char *buf)
  31 {
  32         unsigned long flags;
  33         struct atm_dev *adev = to_atm_dev(cdev);
  34         struct atm_dev_addr *aaddr;
  35         int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
  36         int i, j, count = 0;
  37
  38         spin_lock_irqsave(&adev->lock, flags);
  39         list_for_each_entry(aaddr, &adev->local, entry) {
  40                 for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
  41                         if (j == *fmt) {
  42                                 count += scnprintf(buf + count,
  43                                                    PAGE_SIZE - count, ".");
  44                                 ++fmt;
  45                                 j = 0;
  46                         }
  47                         count += scnprintf(buf + count,
  48                                            PAGE_SIZE - count, "%02x",
  49                                            aaddr->addr.sas_addr.prv[i]);
  50                 }
  51                 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
  52         }
  53         spin_unlock_irqrestore(&adev->lock, flags);
  54
  55         return count;
  56 }
  57
  58 static ssize_t show_atmindex(struct device *cdev,
  59                              struct device_attribute *attr, char *buf)
  60 {
  61         struct atm_dev *adev = to_atm_dev(cdev);
  62
  63         return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
  64 }
  65
  66 static ssize_t show_carrier(struct device *cdev,
  67                             struct device_attribute *attr, char *buf)
  68 {
  69         struct atm_dev *adev = to_atm_dev(cdev);
  70
  71         return scnprintf(buf, PAGE_SIZE, "%d\n",
  72                          adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  73 }
  74
  75 static ssize_t show_link_rate(struct device *cdev,
  76                               struct device_attribute *attr, char *buf)
  77 {
  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         return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
  96 }
  97
  98 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
  99 static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
 100 static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, 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_atmindex,
 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, struct device *parent)
 147 {
 148         struct device *cdev = &adev->class_dev;
 149         int i, j, err;
 150
 151         cdev->class = &atm_class;
 152         cdev->parent = parent;
 153         dev_set_drvdata(cdev, adev);
 154
 155         dev_set_name(cdev, "%s%d", adev->type, adev->number);
 156         err = device_register(cdev);
 157         if (err < 0)
 158                 return err;
 159
 160         for (i = 0; atm_attrs[i]; i++) {
 161                 err = device_create_file(cdev, atm_attrs[i]);
 162                 if (err)
 163                         goto err_out;
 164         }
 165
 166         return 0;
 167
 168 err_out:
 169         for (j = 0; j < i; j++)
 170                 device_remove_file(cdev, atm_attrs[j]);
 171         device_del(cdev);
 172         return err;
 173 }
 174
 175 void atm_unregister_sysfs(struct atm_dev *adev)
 176 {
 177         struct device *cdev = &adev->class_dev;
 178
 179         device_del(cdev);
 180 }
 181
 182 int __init atm_sysfs_init(void)
 183 {
 184         return class_register(&atm_class);
 185 }
 186
 187 void __exit atm_sysfs_exit(void)
 188 {
 189         class_unregister(&atm_class);
 190 }