include/linux/atmdev.h

   1 /* atmdev.h - ATM device driver declarations and various related items */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #ifndef LINUX_ATMDEV_H
   7 #define LINUX_ATMDEV_H
   8
   9
  10 #include <linux/config.h>
  11 #include <linux/atmapi.h>
  12 #include <linux/atm.h>
  13 #include <linux/atmioc.h>
  14
  15
  16 #define ESI_LEN         6
  17
  18 #define ATM_OC3_PCR     (155520000/270*260/8/53)
  19                         /* OC3 link rate:  155520000 bps
  20                            SONET overhead: /270*260 (9 section, 1 path)
  21                            bits per cell:  /8/53
  22                            max cell rate:  353207.547 cells/sec */
  23 #define ATM_25_PCR      ((25600000/8-8000)/54)
  24                         /* 25 Mbps ATM cell rate (59111) */
  25 #define ATM_OC12_PCR    (622080000/1080*1040/8/53)
  26                         /* OC12 link rate: 622080000 bps
  27                            SONET overhead: /1080*1040
  28                            bits per cell:  /8/53
  29                            max cell rate:  1412830.188 cells/sec */
  30 #define ATM_DS3_PCR     (8000*12)
  31                         /* DS3: 12 cells in a 125 usec time slot */
  32
  33 #define atm_sk(__sk) ((struct atm_vcc *)(__sk)->sk_protinfo)
  34 #define ATM_SD(s)       (atm_sk((s)->sk))
  35
  36
  37 #define __AAL_STAT_ITEMS \
  38     __HANDLE_ITEM(tx);                  /* TX okay */ \
  39     __HANDLE_ITEM(tx_err);              /* TX errors */ \
  40     __HANDLE_ITEM(rx);                  /* RX okay */ \
  41     __HANDLE_ITEM(rx_err);              /* RX errors */ \
  42     __HANDLE_ITEM(rx_drop);             /* RX out of memory */
  43
  44 struct atm_aal_stats {
  45 #define __HANDLE_ITEM(i) int i
  46         __AAL_STAT_ITEMS
  47 #undef __HANDLE_ITEM
  48 };
  49
  50
  51 struct atm_dev_stats {
  52         struct atm_aal_stats aal0;
  53         struct atm_aal_stats aal34;
  54         struct atm_aal_stats aal5;
  55 } __ATM_API_ALIGN;
  56
  57
  58 #define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc)
  59                                         /* get link rate */
  60 #define ATM_GETNAMES    _IOW('a',ATMIOC_ITF+3,struct atm_iobuf)
  61                                         /* get interface names (numbers) */
  62 #define ATM_GETTYPE     _IOW('a',ATMIOC_ITF+4,struct atmif_sioc)
  63                                         /* get interface type name */
  64 #define ATM_GETESI      _IOW('a',ATMIOC_ITF+5,struct atmif_sioc)
  65                                         /* get interface ESI */
  66 #define ATM_GETADDR     _IOW('a',ATMIOC_ITF+6,struct atmif_sioc)
  67                                         /* get itf's local ATM addr. list */
  68 #define ATM_RSTADDR     _IOW('a',ATMIOC_ITF+7,struct atmif_sioc)
  69                                         /* reset itf's ATM address list */
  70 #define ATM_ADDADDR     _IOW('a',ATMIOC_ITF+8,struct atmif_sioc)
  71                                         /* add a local ATM address */
  72 #define ATM_DELADDR     _IOW('a',ATMIOC_ITF+9,struct atmif_sioc)
  73                                         /* remove a local ATM address */
  74 #define ATM_GETCIRANGE  _IOW('a',ATMIOC_ITF+10,struct atmif_sioc)
  75                                         /* get connection identifier range */
  76 #define ATM_SETCIRANGE  _IOW('a',ATMIOC_ITF+11,struct atmif_sioc)
  77                                         /* set connection identifier range */
  78 #define ATM_SETESI      _IOW('a',ATMIOC_ITF+12,struct atmif_sioc)
  79                                         /* set interface ESI */
  80 #define ATM_SETESIF     _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
  81                                         /* force interface ESI */
  82 #define ATM_GETSTAT     _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
  83                                         /* get AAL layer statistics */
  84 #define ATM_GETSTATZ    _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
  85                                         /* get AAL layer statistics and zero */
  86 #define ATM_GETLOOP     _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc)
  87                                         /* get loopback mode */
  88 #define ATM_SETLOOP     _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc)
  89                                         /* set loopback mode */
  90 #define ATM_QUERYLOOP   _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc)
  91                                         /* query supported loopback modes */
  92 #define ATM_SETSC       _IOW('a',ATMIOC_SPECIAL+1,int)
  93                                         /* enable or disable single-copy */
  94 #define ATM_SETBACKEND  _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t)
  95                                         /* set backend handler */
  96 #define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
  97                                         /* use backend to make new if */
  98
  99 /*
 100  * These are backend handkers that can be set via the ATM_SETBACKEND call
 101  * above.  In the future we may support dynamic loading of these - for now,
 102  * they're just being used to share the ATMIOC_BACKEND ioctls
 103  */
 104 #define ATM_BACKEND_RAW         0
 105 #define ATM_BACKEND_PPP         1       /* PPPoATM - RFC2364 */
 106 #define ATM_BACKEND_BR2684      2       /* Bridged RFC1483/2684 */
 107
 108 /* for ATM_GETTYPE */
 109 #define ATM_ITFTYP_LEN  8       /* maximum length of interface type name */
 110
 111 /*
 112  * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP
 113  */
 114
 115 /* Point of loopback                            CPU-->SAR-->PHY-->line--> ... */
 116 #define __ATM_LM_NONE   0       /* no loop back     ^     ^     ^      ^      */
 117 #define __ATM_LM_AAL    1       /* loop back PDUs --'     |     |      |      */
 118 #define __ATM_LM_ATM    2       /* loop back ATM cells ---'     |      |      */
 119 /* RESERVED             4       loop back on PHY side  ---'                   */
 120 #define __ATM_LM_PHY    8       /* loop back bits (digital) ----'      |      */
 121 #define __ATM_LM_ANALOG 16      /* loop back the analog signal --------'      */
 122
 123 /* Direction of loopback */
 124 #define __ATM_LM_MKLOC(n)       ((n))       /* Local (i.e. loop TX to RX) */
 125 #define __ATM_LM_MKRMT(n)       ((n) << 8)  /* Remote (i.e. loop RX to TX) */
 126
 127 #define __ATM_LM_XTLOC(n)       ((n) & 0xff)
 128 #define __ATM_LM_XTRMT(n)       (((n) >> 8) & 0xff)
 129
 130 #define ATM_LM_NONE     0       /* no loopback */
 131
 132 #define ATM_LM_LOC_AAL  __ATM_LM_MKLOC(__ATM_LM_AAL)
 133 #define ATM_LM_LOC_ATM  __ATM_LM_MKLOC(__ATM_LM_ATM)
 134 #define ATM_LM_LOC_PHY  __ATM_LM_MKLOC(__ATM_LM_PHY)
 135 #define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG)
 136
 137 #define ATM_LM_RMT_AAL  __ATM_LM_MKRMT(__ATM_LM_AAL)
 138 #define ATM_LM_RMT_ATM  __ATM_LM_MKRMT(__ATM_LM_ATM)
 139 #define ATM_LM_RMT_PHY  __ATM_LM_MKRMT(__ATM_LM_PHY)
 140 #define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG)
 141
 142 /*
 143  * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that
 144  * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x)
 145  */
 146
 147
 148 struct atm_iobuf {
 149         int length;
 150         void __user *buffer;
 151 };
 152
 153 /* for ATM_GETCIRANGE / ATM_SETCIRANGE */
 154
 155 #define ATM_CI_MAX      -1              /* use maximum range of VPI/VCI */
 156
 157 struct atm_cirange {
 158         signed char     vpi_bits;       /* 1..8, ATM_CI_MAX (-1) for maximum */
 159         signed char     vci_bits;       /* 1..16, ATM_CI_MAX (-1) for maximum */
 160 };
 161
 162 /* for ATM_SETSC; actually taken from the ATM_VF number space */
 163
 164 #define ATM_SC_RX       1024            /* enable RX single-copy */
 165 #define ATM_SC_TX       2048            /* enable TX single-copy */
 166
 167 #define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out
 168                                   anyway */
 169
 170 /* MF: change_qos (Modify) flags */
 171
 172 #define ATM_MF_IMMED     1      /* Block until change is effective */
 173 #define ATM_MF_INC_RSV   2      /* Change reservation on increase */
 174 #define ATM_MF_INC_SHP   4      /* Change shaping on increase */
 175 #define ATM_MF_DEC_RSV   8      /* Change reservation on decrease */
 176 #define ATM_MF_DEC_SHP  16      /* Change shaping on decrease */
 177 #define ATM_MF_BWD      32      /* Set the backward direction parameters */
 178
 179 #define ATM_MF_SET      (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \
 180                           ATM_MF_DEC_SHP | ATM_MF_BWD)
 181
 182 /*
 183  * ATM_VS_* are used to express VC state in a human-friendly way.
 184  */
 185
 186 #define ATM_VS_IDLE     0       /* VC is not used */
 187 #define ATM_VS_CONNECTED 1      /* VC is connected */
 188 #define ATM_VS_CLOSING  2       /* VC is closing */
 189 #define ATM_VS_LISTEN   3       /* VC is listening for incoming setups */
 190 #define ATM_VS_INUSE    4       /* VC is in use (registered with atmsigd) */
 191 #define ATM_VS_BOUND    5       /* VC is bound */
 192
 193 #define ATM_VS2TXT_MAP \
 194     "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND"
 195
 196 #define ATM_VF2TXT_MAP \
 197     "ADDR",     "READY",        "PARTIAL",      "REGIS", \
 198     "RELEASED", "HASQOS",       "LISTEN",       "META", \
 199     "256",      "512",          "1024",         "2048", \
 200     "SESSION",  "HASSAP",       "BOUND",        "CLOSE"
 201
 202
 203 #ifdef __KERNEL__
 204
 205 #include <linux/wait.h> /* wait_queue_head_t */
 206 #include <linux/time.h> /* struct timeval */
 207 #include <linux/net.h>
 208 #include <linux/skbuff.h> /* struct sk_buff */
 209 #include <linux/uio.h>
 210 #include <net/sock.h>
 211 #include <asm/atomic.h>
 212
 213 #ifdef CONFIG_PROC_FS
 214 #include <linux/proc_fs.h>
 215
 216 extern struct proc_dir_entry *atm_proc_root;
 217 #endif
 218
 219
 220 struct k_atm_aal_stats {
 221 #define __HANDLE_ITEM(i) atomic_t i
 222         __AAL_STAT_ITEMS
 223 #undef __HANDLE_ITEM
 224 };
 225
 226
 227 struct k_atm_dev_stats {
 228         struct k_atm_aal_stats aal0;
 229         struct k_atm_aal_stats aal34;
 230         struct k_atm_aal_stats aal5;
 231 };
 232
 233
 234 enum {
 235         ATM_VF_ADDR,            /* Address is in use. Set by anybody, cleared
 236                                    by device driver. */
 237         ATM_VF_READY,           /* VC is ready to transfer data. Set by device
 238                                    driver, cleared by anybody. */
 239         ATM_VF_PARTIAL,         /* resources are bound to PVC (partial PVC
 240                                    setup), controlled by socket layer */
 241         ATM_VF_REGIS,           /* registered with demon, controlled by SVC
 242                                    socket layer */
 243         ATM_VF_BOUND,           /* local SAP is set, controlled by SVC socket
 244                                    layer */
 245         ATM_VF_RELEASED,        /* demon has indicated/requested release,
 246                                    controlled by SVC socket layer */
 247         ATM_VF_HASQOS,          /* QOS parameters have been set */
 248         ATM_VF_LISTEN,          /* socket is used for listening */
 249         ATM_VF_META,            /* SVC socket isn't used for normal data
 250                                    traffic and doesn't depend on signaling
 251                                    to be available */
 252         ATM_VF_SESSION,         /* VCC is p2mp session control descriptor */
 253         ATM_VF_HASSAP,          /* SAP has been set */
 254         ATM_VF_CLOSE,           /* asynchronous close - treat like VF_RELEASED*/
 255         ATM_VF_WAITING,         /* waiting for reply from sigd */
 256         ATM_VF_IS_CLIP,         /* in use by CLIP protocol */
 257 };
 258
 259
 260 #define ATM_VF2VS(flags) \
 261     (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
 262      test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
 263      test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
 264      test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
 265      test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
 266
 267
 268 enum {
 269         ATM_DF_CLOSE,           /* close device when last VCC is closed */
 270 };
 271
 272
 273 #define ATM_PHY_SIG_LOST    0   /* no carrier/light */
 274 #define ATM_PHY_SIG_UNKNOWN 1   /* carrier/light status is unknown */
 275 #define ATM_PHY_SIG_FOUND   2   /* carrier/light okay */
 276
 277 #define ATM_ATMOPT_CLP  1       /* set CLP bit */
 278
 279 struct atm_vcc {
 280         unsigned long   flags;          /* VCC flags (ATM_VF_*) */
 281         short           vpi;            /* VPI and VCI (types must be equal */
 282                                         /* with sockaddr) */
 283         int             vci;
 284         unsigned long   aal_options;    /* AAL layer options */
 285         unsigned long   atm_options;    /* ATM layer options */
 286         struct atm_dev  *dev;           /* device back pointer */
 287         struct atm_qos  qos;            /* QOS */
 288         struct atm_sap  sap;            /* SAP */
 289         void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
 290         void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
 291         int (*push_oam)(struct atm_vcc *vcc,void *cell);
 292         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 293         void            *dev_data;      /* per-device data */
 294         void            *proto_data;    /* per-protocol data */
 295         struct k_atm_aal_stats *stats;  /* pointer to AAL stats group */
 296         struct sock     *sk;            /* socket backpointer */
 297         /* SVC part --- may move later ------------------------------------- */
 298         short           itf;            /* interface number */
 299         struct sockaddr_atmsvc local;
 300         struct sockaddr_atmsvc remote;
 301         /* Multipoint part ------------------------------------------------- */
 302         struct atm_vcc  *session;       /* session VCC descriptor */
 303         /* Other stuff ----------------------------------------------------- */
 304         void            *user_back;     /* user backlink - not touched by */
 305                                         /* native ATM stack. Currently used */
 306                                         /* by CLIP and sch_atm. */
 307 };
 308
 309
 310 struct atm_dev_addr {
 311         struct sockaddr_atmsvc addr;    /* ATM address */
 312         struct atm_dev_addr *next;      /* next address */
 313 };
 314
 315 struct atm_dev {
 316         const struct atmdev_ops *ops;   /* device operations; NULL if unused */
 317         const struct atmphy_ops *phy;   /* PHY operations, may be undefined */
 318                                         /* (NULL) */
 319         const char      *type;          /* device type name */
 320         int             number;         /* device index */
 321         void            *dev_data;      /* per-device data */
 322         void            *phy_data;      /* private PHY date */
 323         unsigned long   flags;          /* device flags (ATM_DF_*) */
 324         struct atm_dev_addr *local;     /* local ATM addresses */
 325         unsigned char   esi[ESI_LEN];   /* ESI ("MAC" addr) */
 326         struct atm_cirange ci_range;    /* VPI/VCI range */
 327         struct k_atm_dev_stats stats;   /* statistics */
 328         char            signal;         /* signal status (ATM_PHY_SIG_*) */
 329         int             link_rate;      /* link rate (default: OC3) */
 330         atomic_t        refcnt;         /* reference count */
 331         spinlock_t      lock;           /* protect internal members */
 332 #ifdef CONFIG_PROC_FS
 333         struct proc_dir_entry *proc_entry; /* proc entry */
 334         char *proc_name;                /* proc entry name */
 335 #endif
 336         struct list_head dev_list;      /* linkage */
 337 };
 338
 339
 340 /* OF: send_Oam Flags */
 341
 342 #define ATM_OF_IMMED  1         /* Attempt immediate delivery */
 343 #define ATM_OF_INRATE 2         /* Attempt in-rate delivery */
 344
 345
 346 /*
 347  * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
 348  */
 349
 350 struct atmdev_ops { /* only send is required */
 351         void (*dev_close)(struct atm_dev *dev);
 352         int (*open)(struct atm_vcc *vcc);
 353         void (*close)(struct atm_vcc *vcc);
 354         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 355         int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
 356             void __user *optval,int optlen);
 357         int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
 358             void __user *optval,int optlen);
 359         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 360         int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
 361         void (*phy_put)(struct atm_dev *dev,unsigned char value,
 362             unsigned long addr);
 363         unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
 364         int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
 365         int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
 366         struct module *owner;
 367 };
 368
 369 struct atmphy_ops {
 370         int (*start)(struct atm_dev *dev);
 371         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 372         void (*interrupt)(struct atm_dev *dev);
 373         int (*stop)(struct atm_dev *dev);
 374 };
 375
 376 struct atm_skb_data {
 377         struct atm_vcc  *vcc;           /* ATM VCC */
 378         unsigned long   atm_options;    /* ATM layer options */
 379 };
 380
 381 #define VCC_HTABLE_SIZE 32
 382
 383 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
 384 extern rwlock_t vcc_sklist_lock;
 385
 386 #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
 387
 388 struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops,
 389     int number,unsigned long *flags); /* number == -1: pick first available */
 390 struct atm_dev *atm_dev_lookup(int number);
 391 void atm_dev_deregister(struct atm_dev *dev);
 392 void shutdown_atm_dev(struct atm_dev *dev);
 393 void vcc_insert_socket(struct sock *sk);
 394 void vcc_remove_socket(struct sock *sk);
 395
 396
 397 /*
 398  * This is approximately the algorithm used by alloc_skb.
 399  *
 400  */
 401
 402 static inline int atm_guess_pdu2truesize(int size)
 403 {
 404         return (SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info));
 405 }
 406
 407
 408 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
 409 {
 410         atomic_add(truesize, &vcc->sk->sk_rmem_alloc);
 411 }
 412
 413
 414 static inline void atm_return(struct atm_vcc *vcc,int truesize)
 415 {
 416         atomic_sub(truesize, &vcc->sk->sk_rmem_alloc);
 417 }
 418
 419
 420 static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
 421 {
 422         return (size + atomic_read(&vcc->sk->sk_wmem_alloc)) <
 423                vcc->sk->sk_sndbuf;
 424 }
 425
 426
 427 static inline void atm_dev_hold(struct atm_dev *dev)
 428 {
 429         atomic_inc(&dev->refcnt);
 430 }
 431
 432
 433 static inline void atm_dev_put(struct atm_dev *dev)
 434 {
 435         atomic_dec(&dev->refcnt);
 436
 437         if ((atomic_read(&dev->refcnt) == 1) &&
 438             test_bit(ATM_DF_CLOSE,&dev->flags))
 439                 shutdown_atm_dev(dev);
 440 }
 441
 442
 443 int atm_charge(struct atm_vcc *vcc,int truesize);
 444 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
 445     int gfp_flags);
 446 int atm_pcr_goal(struct atm_trafprm *tp);
 447
 448 void vcc_release_async(struct atm_vcc *vcc, int reply);
 449
 450 struct atm_ioctl {
 451         struct module *owner;
 452         /* A module reference is kept if appropriate over this call.
 453          * Return -ENOIOCTLCMD if you don't handle it. */
 454         int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
 455         struct list_head list;
 456 };
 457
 458 /**
 459  * register_atm_ioctl - register handler for ioctl operations
 460  *
 461  * Special (non-device) handlers of ioctl's should
 462  * register here. If you're a normal device, you should
 463  * set .ioctl in your atmdev_ops instead.
 464  */
 465 void register_atm_ioctl(struct atm_ioctl *);
 466
 467 /**
 468  * deregister_atm_ioctl - remove the ioctl handler
 469  */
 470 void deregister_atm_ioctl(struct atm_ioctl *);
 471
 472 #endif /* __KERNEL__ */
 473
 474 #endif