linux/include/linux/atmdev.h
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   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
  19extern struct proc_dir_entry *atm_proc_root;
  20#endif
  21
  22#ifdef CONFIG_COMPAT
  23#include <linux/compat.h>
  24struct compat_atm_iobuf {
  25        int length;
  26        compat_uptr_t buffer;
  27};
  28#endif
  29
  30struct k_atm_aal_stats {
  31#define __HANDLE_ITEM(i) atomic_t i
  32        __AAL_STAT_ITEMS
  33#undef __HANDLE_ITEM
  34};
  35
  36
  37struct 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
  43struct device;
  44
  45enum {
  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
  79enum {
  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
  90struct 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
 123static inline struct atm_vcc *atm_sk(struct sock *sk)
 124{
 125        return (struct atm_vcc *)sk;
 126}
 127
 128static inline struct atm_vcc *ATM_SD(struct socket *sock)
 129{
 130        return atm_sk(sock->sk);
 131}
 132
 133static inline struct sock *sk_atm(struct atm_vcc *vcc)
 134{
 135        return (struct sock *)vcc;
 136}
 137
 138struct atm_dev_addr {
 139        struct sockaddr_atmsvc addr;    /* ATM address */
 140        struct list_head entry;         /* next address */
 141};
 142
 143enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
 144
 145struct 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
 182struct 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
 205struct 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
 212struct 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
 219extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
 220extern rwlock_t vcc_sklist_lock;
 221
 222#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
 223
 224struct 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);
 228struct atm_dev *atm_dev_lookup(int number);
 229void 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 */
 236void atm_dev_signal_change(struct atm_dev *dev, char signal);
 237
 238void vcc_insert_socket(struct sock *sk);
 239
 240void atm_dev_release_vccs(struct atm_dev *dev);
 241
 242
 243static 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
 249static inline void atm_return(struct atm_vcc *vcc,int truesize)
 250{
 251        atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 252}
 253
 254
 255static 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
 262static inline void atm_dev_hold(struct atm_dev *dev)
 263{
 264        atomic_inc(&dev->refcnt);
 265}
 266
 267
 268static 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
 279int atm_charge(struct atm_vcc *vcc,int truesize);
 280struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
 281    gfp_t gfp_flags);
 282int atm_pcr_goal(const struct atm_trafprm *tp);
 283
 284void vcc_release_async(struct atm_vcc *vcc, int reply);
 285
 286struct 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 */
 301void register_atm_ioctl(struct atm_ioctl *);
 302
 303/**
 304 * deregister_atm_ioctl - remove the ioctl handler
 305 */
 306void 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 */
 314int register_atmdevice_notifier(struct notifier_block *nb);
 315void unregister_atmdevice_notifier(struct notifier_block *nb);
 316
 317#endif
 318
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