include/linux/atmdev.h

   1 /* atmdev.h - ATM device driver declarations and various related items */
   2 #ifndef LINUX_ATMDEV_H
   3 #define LINUX_ATMDEV_H
   4
   5
   6 #include <linux/wait.h> /* wait_queue_head_t */
   7 #include <linux/time.h> /* struct timeval */
   8 #include <linux/net.h>
   9 #include <linux/bug.h>
  10 #include <linux/skbuff.h> /* struct sk_buff */
  11 #include <linux/uio.h>
  12 #include <net/sock.h>
  13 #include <linux/atomic.h>
  14 #include <uapi/linux/atmdev.h>
  15
  16 #ifdef CONFIG_PROC_FS
  17 #include <linux/proc_fs.h>
  18
  19 extern struct proc_dir_entry *atm_proc_root;
  20 #endif
  21
  22 #ifdef CONFIG_COMPAT
  23 #include <linux/compat.h>
  24 struct compat_atm_iobuf {
  25         int length;
  26         compat_uptr_t buffer;
  27 };
  28 #endif
  29
  30 struct k_atm_aal_stats {
  31 #define __HANDLE_ITEM(i) atomic_t i
  32         __AAL_STAT_ITEMS
  33 #undef __HANDLE_ITEM
  34 };
  35
  36
  37 struct k_atm_dev_stats {
  38         struct k_atm_aal_stats aal0;
  39         struct k_atm_aal_stats aal34;
  40         struct k_atm_aal_stats aal5;
  41 };
  42
  43 struct device;
  44
  45 enum {
  46         ATM_VF_ADDR,            /* Address is in use. Set by anybody, cleared
  47                                    by device driver. */
  48         ATM_VF_READY,           /* VC is ready to transfer data. Set by device
  49                                    driver, cleared by anybody. */
  50         ATM_VF_PARTIAL,         /* resources are bound to PVC (partial PVC
  51                                    setup), controlled by socket layer */
  52         ATM_VF_REGIS,           /* registered with demon, controlled by SVC
  53                                    socket layer */
  54         ATM_VF_BOUND,           /* local SAP is set, controlled by SVC socket
  55                                    layer */
  56         ATM_VF_RELEASED,        /* demon has indicated/requested release,
  57                                    controlled by SVC socket layer */
  58         ATM_VF_HASQOS,          /* QOS parameters have been set */
  59         ATM_VF_LISTEN,          /* socket is used for listening */
  60         ATM_VF_META,            /* SVC socket isn't used for normal data
  61                                    traffic and doesn't depend on signaling
  62                                    to be available */
  63         ATM_VF_SESSION,         /* VCC is p2mp session control descriptor */
  64         ATM_VF_HASSAP,          /* SAP has been set */
  65         ATM_VF_CLOSE,           /* asynchronous close - treat like VF_RELEASED*/
  66         ATM_VF_WAITING,         /* waiting for reply from sigd */
  67         ATM_VF_IS_CLIP,         /* in use by CLIP protocol */
  68 };
  69
  70
  71 #define ATM_VF2VS(flags) \
  72     (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
  73      test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
  74      test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
  75      test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
  76      test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
  77
  78
  79 enum {
  80         ATM_DF_REMOVED,         /* device was removed from atm_devs list */
  81 };
  82
  83
  84 #define ATM_PHY_SIG_LOST    0   /* no carrier/light */
  85 #define ATM_PHY_SIG_UNKNOWN 1   /* carrier/light status is unknown */
  86 #define ATM_PHY_SIG_FOUND   2   /* carrier/light okay */
  87
  88 #define ATM_ATMOPT_CLP  1       /* set CLP bit */
  89
  90 struct atm_vcc {
  91         /* struct sock has to be the first member of atm_vcc */
  92         struct sock     sk;
  93         unsigned long   flags;          /* VCC flags (ATM_VF_*) */
  94         short           vpi;            /* VPI and VCI (types must be equal */
  95                                         /* with sockaddr) */
  96         int             vci;
  97         unsigned long   aal_options;    /* AAL layer options */
  98         unsigned long   atm_options;    /* ATM layer options */
  99         struct atm_dev  *dev;           /* device back pointer */
 100         struct atm_qos  qos;            /* QOS */
 101         struct atm_sap  sap;            /* SAP */
 102         void (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
 103         void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
 104         void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
 105         int (*push_oam)(struct atm_vcc *vcc,void *cell);
 106         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 107         void            *dev_data;      /* per-device data */
 108         void            *proto_data;    /* per-protocol data */
 109         struct k_atm_aal_stats *stats;  /* pointer to AAL stats group */
 110         struct module *owner;           /* owner of ->push function */
 111         /* SVC part --- may move later ------------------------------------- */
 112         short           itf;            /* interface number */
 113         struct sockaddr_atmsvc local;
 114         struct sockaddr_atmsvc remote;
 115         /* Multipoint part ------------------------------------------------- */
 116         struct atm_vcc  *session;       /* session VCC descriptor */
 117         /* Other stuff ----------------------------------------------------- */
 118         void            *user_back;     /* user backlink - not touched by */
 119                                         /* native ATM stack. Currently used */
 120                                         /* by CLIP and sch_atm. */
 121 };
 122
 123 static inline struct atm_vcc *atm_sk(struct sock *sk)
 124 {
 125         return (struct atm_vcc *)sk;
 126 }
 127
 128 static inline struct atm_vcc *ATM_SD(struct socket *sock)
 129 {
 130         return atm_sk(sock->sk);
 131 }
 132
 133 static inline struct sock *sk_atm(struct atm_vcc *vcc)
 134 {
 135         return (struct sock *)vcc;
 136 }
 137
 138 struct atm_dev_addr {
 139         struct sockaddr_atmsvc addr;    /* ATM address */
 140         struct list_head entry;         /* next address */
 141 };
 142
 143 enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
 144
 145 struct atm_dev {
 146         const struct atmdev_ops *ops;   /* device operations; NULL if unused */
 147         const struct atmphy_ops *phy;   /* PHY operations, may be undefined */
 148                                         /* (NULL) */
 149         const char      *type;          /* device type name */
 150         int             number;         /* device index */
 151         void            *dev_data;      /* per-device data */
 152         void            *phy_data;      /* private PHY date */
 153         unsigned long   flags;          /* device flags (ATM_DF_*) */
 154         struct list_head local;         /* local ATM addresses */
 155         struct list_head lecs;          /* LECS ATM addresses learned via ILMI */
 156         unsigned char   esi[ESI_LEN];   /* ESI ("MAC" addr) */
 157         struct atm_cirange ci_range;    /* VPI/VCI range */
 158         struct k_atm_dev_stats stats;   /* statistics */
 159         char            signal;         /* signal status (ATM_PHY_SIG_*) */
 160         int             link_rate;      /* link rate (default: OC3) */
 161         atomic_t        refcnt;         /* reference count */
 162         spinlock_t      lock;           /* protect internal members */
 163 #ifdef CONFIG_PROC_FS
 164         struct proc_dir_entry *proc_entry; /* proc entry */
 165         char *proc_name;                /* proc entry name */
 166 #endif
 167         struct device class_dev;        /* sysfs device */
 168         struct list_head dev_list;      /* linkage */
 169 };
 170
 171
 172 /* OF: send_Oam Flags */
 173
 174 #define ATM_OF_IMMED  1         /* Attempt immediate delivery */
 175 #define ATM_OF_INRATE 2         /* Attempt in-rate delivery */
 176
 177
 178 /*
 179  * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
 180  */
 181
 182 struct atmdev_ops { /* only send is required */
 183         void (*dev_close)(struct atm_dev *dev);
 184         int (*open)(struct atm_vcc *vcc);
 185         void (*close)(struct atm_vcc *vcc);
 186         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 187 #ifdef CONFIG_COMPAT
 188         int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
 189                             void __user *arg);
 190 #endif
 191         int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
 192             void __user *optval,int optlen);
 193         int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
 194             void __user *optval,unsigned int optlen);
 195         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 196         int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
 197         void (*phy_put)(struct atm_dev *dev,unsigned char value,
 198             unsigned long addr);
 199         unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
 200         int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
 201         int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
 202         struct module *owner;
 203 };
 204
 205 struct atmphy_ops {
 206         int (*start)(struct atm_dev *dev);
 207         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 208         void (*interrupt)(struct atm_dev *dev);
 209         int (*stop)(struct atm_dev *dev);
 210 };
 211
 212 struct atm_skb_data {
 213         struct atm_vcc  *vcc;           /* ATM VCC */
 214         unsigned long   atm_options;    /* ATM layer options */
 215 };
 216
 217 #define VCC_HTABLE_SIZE 32
 218
 219 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
 220 extern rwlock_t vcc_sklist_lock;
 221
 222 #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
 223
 224 struct atm_dev *atm_dev_register(const char *type, struct device *parent,
 225                                  const struct atmdev_ops *ops,
 226                                  int number, /* -1 == pick first available */
 227                                  unsigned long *flags);
 228 struct atm_dev *atm_dev_lookup(int number);
 229 void atm_dev_deregister(struct atm_dev *dev);
 230
 231 /* atm_dev_signal_change
 232  *
 233  * Propagate lower layer signal change in atm_dev->signal to netdevice.
 234  * The event will be sent via a notifier call chain.
 235  */
 236 void atm_dev_signal_change(struct atm_dev *dev, char signal);
 237
 238 void vcc_insert_socket(struct sock *sk);
 239
 240 void atm_dev_release_vccs(struct atm_dev *dev);
 241
 242
 243 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
 244 {
 245         atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 246 }
 247
 248
 249 static inline void atm_return(struct atm_vcc *vcc,int truesize)
 250 {
 251         atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 252 }
 253
 254
 255 static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
 256 {
 257         return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
 258                sk_atm(vcc)->sk_sndbuf;
 259 }
 260
 261
 262 static inline void atm_dev_hold(struct atm_dev *dev)
 263 {
 264         atomic_inc(&dev->refcnt);
 265 }
 266
 267
 268 static inline void atm_dev_put(struct atm_dev *dev)
 269 {
 270         if (atomic_dec_and_test(&dev->refcnt)) {
 271                 BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
 272                 if (dev->ops->dev_close)
 273                         dev->ops->dev_close(dev);
 274                 put_device(&dev->class_dev);
 275         }
 276 }
 277
 278
 279 int atm_charge(struct atm_vcc *vcc,int truesize);
 280 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
 281     gfp_t gfp_flags);
 282 int atm_pcr_goal(const struct atm_trafprm *tp);
 283
 284 void vcc_release_async(struct atm_vcc *vcc, int reply);
 285
 286 struct atm_ioctl {
 287         struct module *owner;
 288         /* A module reference is kept if appropriate over this call.
 289          * Return -ENOIOCTLCMD if you don't handle it. */
 290         int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
 291         struct list_head list;
 292 };
 293
 294 /**
 295  * register_atm_ioctl - register handler for ioctl operations
 296  *
 297  * Special (non-device) handlers of ioctl's should
 298  * register here. If you're a normal device, you should
 299  * set .ioctl in your atmdev_ops instead.
 300  */
 301 void register_atm_ioctl(struct atm_ioctl *);
 302
 303 /**
 304  * deregister_atm_ioctl - remove the ioctl handler
 305  */
 306 void deregister_atm_ioctl(struct atm_ioctl *);
 307
 308
 309 /* register_atmdevice_notifier - register atm_dev notify events
 310  *
 311  * Clients like br2684 will register notify events
 312  * Currently we notify of signal found/lost
 313  */
 314 int register_atmdevice_notifier(struct notifier_block *nb);
 315 void unregister_atmdevice_notifier(struct notifier_block *nb);
 316
 317 #endif