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", aaddr->addr.sas_addr.prv[i]);
  52                 }
  53                 pos += sprintf(pos, "\n");
  54         }
  55         spin_unlock_irqrestore(&adev->lock, flags);
  56
  57         return pos - buf;
  58 }
  59
  60 static ssize_t show_carrier(struct device *cdev,
  61                             struct device_attribute *attr, char *buf)
  62 {
  63         char *pos = buf;
  64         struct atm_dev *adev = to_atm_dev(cdev);
  65
  66         pos += sprintf(pos, "%d\n",
  67                        adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
  68
  69         return pos - buf;
  70 }
  71
  72 static ssize_t show_link_rate(struct device *cdev,
  73                               struct device_attribute *attr, char *buf)
  74 {
  75         char *pos = buf;
  76         struct atm_dev *adev = to_atm_dev(cdev);
  77         int link_rate;
  78
  79         /* show the link rate, not the data rate */
  80         switch (adev->link_rate) {
  81                 case ATM_OC3_PCR:
  82                         link_rate = 155520000;
  83                         break;
  84                 case ATM_OC12_PCR:
  85                         link_rate = 622080000;
  86                         break;
  87                 case ATM_25_PCR:
  88                         link_rate = 25600000;
  89                         break;
  90                 default:
  91                         link_rate = adev->link_rate * 8 * 53;
  92         }
  93         pos += sprintf(pos, "%d\n", link_rate);
  94
  95         return pos - buf;
  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(carrier, S_IRUGO, show_carrier, NULL);
 101 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 102 static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
 103
 104 static struct device_attribute *atm_attrs[] = {
 105         &dev_attr_atmaddress,
 106         &dev_attr_address,
 107         &dev_attr_carrier,
 108         &dev_attr_type,
 109         &dev_attr_link_rate,
 110         NULL
 111 };
 112
 113
 114 static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
 115 {
 116         struct atm_dev *adev;
 117
 118         if (!cdev)
 119                 return -ENODEV;
 120
 121         adev = to_atm_dev(cdev);
 122         if (!adev)
 123                 return -ENODEV;
 124
 125         if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
 126                 return -ENOMEM;
 127
 128         return 0;
 129 }
 130
 131 static void atm_release(struct device *cdev)
 132 {
 133         struct atm_dev *adev = to_atm_dev(cdev);
 134
 135         kfree(adev);
 136 }
 137
 138 static struct class atm_class = {
 139         .name           = "atm",
 140         .dev_release    = atm_release,
 141         .dev_uevent             = atm_uevent,
 142 };
 143
 144 int atm_register_sysfs(struct atm_dev *adev)
 145 {
 146         struct device *cdev = &adev->class_dev;
 147         int i, j, err;
 148
 149         cdev->class = &atm_class;
 150         dev_set_drvdata(cdev, adev);
 151
 152         snprintf(cdev->bus_id, BUS_ID_SIZE, "%s%d", adev->type, adev->number);
 153         err = device_register(cdev);
 154         if (err < 0)
 155                 return err;
 156
 157         for (i = 0; atm_attrs[i]; i++) {
 158                 err = device_create_file(cdev, atm_attrs[i]);
 159                 if (err)
 160                         goto err_out;
 161         }
 162
 163         return 0;
 164
 165 err_out:
 166         for (j = 0; j < i; j++)
 167                 device_remove_file(cdev, atm_attrs[j]);
 168         device_del(cdev);
 169         return err;
 170 }
 171
 172 void atm_unregister_sysfs(struct atm_dev *adev)
 173 {
 174         struct device *cdev = &adev->class_dev;
 175
 176         device_del(cdev);
 177 }
 178
 179 int __init atm_sysfs_init(void)
 180 {
 181         return class_register(&atm_class);
 182 }
 183
 184 void __exit atm_sysfs_exit(void)
 185 {
 186         class_unregister(&atm_class);
 187 }