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/device.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
  34 #define __AAL_STAT_ITEMS \
  35     __HANDLE_ITEM(tx);                  /* TX okay */ \
  36     __HANDLE_ITEM(tx_err);              /* TX errors */ \
  37     __HANDLE_ITEM(rx);                  /* RX okay */ \
  38     __HANDLE_ITEM(rx_err);              /* RX errors */ \
  39     __HANDLE_ITEM(rx_drop);             /* RX out of memory */
  40
  41 struct atm_aal_stats {
  42 #define __HANDLE_ITEM(i) int i
  43         __AAL_STAT_ITEMS
  44 #undef __HANDLE_ITEM
  45 };
  46
  47
  48 struct atm_dev_stats {
  49         struct atm_aal_stats aal0;
  50         struct atm_aal_stats aal34;
  51         struct atm_aal_stats aal5;
  52 } __ATM_API_ALIGN;
  53
  54
  55 #define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc)
  56                                         /* get link rate */
  57 #define ATM_GETNAMES    _IOW('a',ATMIOC_ITF+3,struct atm_iobuf)
  58                                         /* get interface names (numbers) */
  59 #define ATM_GETTYPE     _IOW('a',ATMIOC_ITF+4,struct atmif_sioc)
  60                                         /* get interface type name */
  61 #define ATM_GETESI      _IOW('a',ATMIOC_ITF+5,struct atmif_sioc)
  62                                         /* get interface ESI */
  63 #define ATM_GETADDR     _IOW('a',ATMIOC_ITF+6,struct atmif_sioc)
  64                                         /* get itf's local ATM addr. list */
  65 #define ATM_RSTADDR     _IOW('a',ATMIOC_ITF+7,struct atmif_sioc)
  66                                         /* reset itf's ATM address list */
  67 #define ATM_ADDADDR     _IOW('a',ATMIOC_ITF+8,struct atmif_sioc)
  68                                         /* add a local ATM address */
  69 #define ATM_DELADDR     _IOW('a',ATMIOC_ITF+9,struct atmif_sioc)
  70                                         /* remove a local ATM address */
  71 #define ATM_GETCIRANGE  _IOW('a',ATMIOC_ITF+10,struct atmif_sioc)
  72                                         /* get connection identifier range */
  73 #define ATM_SETCIRANGE  _IOW('a',ATMIOC_ITF+11,struct atmif_sioc)
  74                                         /* set connection identifier range */
  75 #define ATM_SETESI      _IOW('a',ATMIOC_ITF+12,struct atmif_sioc)
  76                                         /* set interface ESI */
  77 #define ATM_SETESIF     _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
  78                                         /* force interface ESI */
  79 #define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc)
  80                                         /* register a LECS address */
  81 #define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc)
  82                                         /* unregister a LECS address */
  83 #define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc)
  84                                         /* retrieve LECS address(es) */
  85
  86 #define ATM_GETSTAT     _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
  87                                         /* get AAL layer statistics */
  88 #define ATM_GETSTATZ    _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
  89                                         /* get AAL layer statistics and zero */
  90 #define ATM_GETLOOP     _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc)
  91                                         /* get loopback mode */
  92 #define ATM_SETLOOP     _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc)
  93                                         /* set loopback mode */
  94 #define ATM_QUERYLOOP   _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc)
  95                                         /* query supported loopback modes */
  96 #define ATM_SETSC       _IOW('a',ATMIOC_SPECIAL+1,int)
  97                                         /* enable or disable single-copy */
  98 #define ATM_SETBACKEND  _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t)
  99                                         /* set backend handler */
 100 #define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
 101                                         /* use backend to make new if */
 102 #define ATM_ADDPARTY    _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
 103                                         /* add party to p2mp call */
 104 #define ATM_DROPPARTY   _IOW('a', ATMIOC_SPECIAL+5,int)
 105                                         /* drop party from p2mp call */
 106
 107 /*
 108  * These are backend handkers that can be set via the ATM_SETBACKEND call
 109  * above.  In the future we may support dynamic loading of these - for now,
 110  * they're just being used to share the ATMIOC_BACKEND ioctls
 111  */
 112 #define ATM_BACKEND_RAW         0
 113 #define ATM_BACKEND_PPP         1       /* PPPoATM - RFC2364 */
 114 #define ATM_BACKEND_BR2684      2       /* Bridged RFC1483/2684 */
 115
 116 /* for ATM_GETTYPE */
 117 #define ATM_ITFTYP_LEN  8       /* maximum length of interface type name */
 118
 119 /*
 120  * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP
 121  */
 122
 123 /* Point of loopback                            CPU-->SAR-->PHY-->line--> ... */
 124 #define __ATM_LM_NONE   0       /* no loop back     ^     ^     ^      ^      */
 125 #define __ATM_LM_AAL    1       /* loop back PDUs --'     |     |      |      */
 126 #define __ATM_LM_ATM    2       /* loop back ATM cells ---'     |      |      */
 127 /* RESERVED             4       loop back on PHY side  ---'                   */
 128 #define __ATM_LM_PHY    8       /* loop back bits (digital) ----'      |      */
 129 #define __ATM_LM_ANALOG 16      /* loop back the analog signal --------'      */
 130
 131 /* Direction of loopback */
 132 #define __ATM_LM_MKLOC(n)       ((n))       /* Local (i.e. loop TX to RX) */
 133 #define __ATM_LM_MKRMT(n)       ((n) << 8)  /* Remote (i.e. loop RX to TX) */
 134
 135 #define __ATM_LM_XTLOC(n)       ((n) & 0xff)
 136 #define __ATM_LM_XTRMT(n)       (((n) >> 8) & 0xff)
 137
 138 #define ATM_LM_NONE     0       /* no loopback */
 139
 140 #define ATM_LM_LOC_AAL  __ATM_LM_MKLOC(__ATM_LM_AAL)
 141 #define ATM_LM_LOC_ATM  __ATM_LM_MKLOC(__ATM_LM_ATM)
 142 #define ATM_LM_LOC_PHY  __ATM_LM_MKLOC(__ATM_LM_PHY)
 143 #define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG)
 144
 145 #define ATM_LM_RMT_AAL  __ATM_LM_MKRMT(__ATM_LM_AAL)
 146 #define ATM_LM_RMT_ATM  __ATM_LM_MKRMT(__ATM_LM_ATM)
 147 #define ATM_LM_RMT_PHY  __ATM_LM_MKRMT(__ATM_LM_PHY)
 148 #define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG)
 149
 150 /*
 151  * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that
 152  * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x)
 153  */
 154
 155
 156 struct atm_iobuf {
 157         int length;
 158         void __user *buffer;
 159 };
 160
 161 /* for ATM_GETCIRANGE / ATM_SETCIRANGE */
 162
 163 #define ATM_CI_MAX      -1              /* use maximum range of VPI/VCI */
 164
 165 struct atm_cirange {
 166         signed char     vpi_bits;       /* 1..8, ATM_CI_MAX (-1) for maximum */
 167         signed char     vci_bits;       /* 1..16, ATM_CI_MAX (-1) for maximum */
 168 };
 169
 170 /* for ATM_SETSC; actually taken from the ATM_VF number space */
 171
 172 #define ATM_SC_RX       1024            /* enable RX single-copy */
 173 #define ATM_SC_TX       2048            /* enable TX single-copy */
 174
 175 #define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out
 176                                   anyway */
 177
 178 /* MF: change_qos (Modify) flags */
 179
 180 #define ATM_MF_IMMED     1      /* Block until change is effective */
 181 #define ATM_MF_INC_RSV   2      /* Change reservation on increase */
 182 #define ATM_MF_INC_SHP   4      /* Change shaping on increase */
 183 #define ATM_MF_DEC_RSV   8      /* Change reservation on decrease */
 184 #define ATM_MF_DEC_SHP  16      /* Change shaping on decrease */
 185 #define ATM_MF_BWD      32      /* Set the backward direction parameters */
 186
 187 #define ATM_MF_SET      (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \
 188                           ATM_MF_DEC_SHP | ATM_MF_BWD)
 189
 190 /*
 191  * ATM_VS_* are used to express VC state in a human-friendly way.
 192  */
 193
 194 #define ATM_VS_IDLE     0       /* VC is not used */
 195 #define ATM_VS_CONNECTED 1      /* VC is connected */
 196 #define ATM_VS_CLOSING  2       /* VC is closing */
 197 #define ATM_VS_LISTEN   3       /* VC is listening for incoming setups */
 198 #define ATM_VS_INUSE    4       /* VC is in use (registered with atmsigd) */
 199 #define ATM_VS_BOUND    5       /* VC is bound */
 200
 201 #define ATM_VS2TXT_MAP \
 202     "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND"
 203
 204 #define ATM_VF2TXT_MAP \
 205     "ADDR",     "READY",        "PARTIAL",      "REGIS", \
 206     "RELEASED", "HASQOS",       "LISTEN",       "META", \
 207     "256",      "512",          "1024",         "2048", \
 208     "SESSION",  "HASSAP",       "BOUND",        "CLOSE"
 209
 210
 211 #ifdef __KERNEL__
 212
 213 #include <linux/wait.h> /* wait_queue_head_t */
 214 #include <linux/time.h> /* struct timeval */
 215 #include <linux/net.h>
 216 #include <linux/skbuff.h> /* struct sk_buff */
 217 #include <linux/uio.h>
 218 #include <net/sock.h>
 219 #include <asm/atomic.h>
 220
 221 #ifdef CONFIG_PROC_FS
 222 #include <linux/proc_fs.h>
 223
 224 extern struct proc_dir_entry *atm_proc_root;
 225 #endif
 226
 227
 228 struct k_atm_aal_stats {
 229 #define __HANDLE_ITEM(i) atomic_t i
 230         __AAL_STAT_ITEMS
 231 #undef __HANDLE_ITEM
 232 };
 233
 234
 235 struct k_atm_dev_stats {
 236         struct k_atm_aal_stats aal0;
 237         struct k_atm_aal_stats aal34;
 238         struct k_atm_aal_stats aal5;
 239 };
 240
 241
 242 enum {
 243         ATM_VF_ADDR,            /* Address is in use. Set by anybody, cleared
 244                                    by device driver. */
 245         ATM_VF_READY,           /* VC is ready to transfer data. Set by device
 246                                    driver, cleared by anybody. */
 247         ATM_VF_PARTIAL,         /* resources are bound to PVC (partial PVC
 248                                    setup), controlled by socket layer */
 249         ATM_VF_REGIS,           /* registered with demon, controlled by SVC
 250                                    socket layer */
 251         ATM_VF_BOUND,           /* local SAP is set, controlled by SVC socket
 252                                    layer */
 253         ATM_VF_RELEASED,        /* demon has indicated/requested release,
 254                                    controlled by SVC socket layer */
 255         ATM_VF_HASQOS,          /* QOS parameters have been set */
 256         ATM_VF_LISTEN,          /* socket is used for listening */
 257         ATM_VF_META,            /* SVC socket isn't used for normal data
 258                                    traffic and doesn't depend on signaling
 259                                    to be available */
 260         ATM_VF_SESSION,         /* VCC is p2mp session control descriptor */
 261         ATM_VF_HASSAP,          /* SAP has been set */
 262         ATM_VF_CLOSE,           /* asynchronous close - treat like VF_RELEASED*/
 263         ATM_VF_WAITING,         /* waiting for reply from sigd */
 264         ATM_VF_IS_CLIP,         /* in use by CLIP protocol */
 265 };
 266
 267
 268 #define ATM_VF2VS(flags) \
 269     (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
 270      test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
 271      test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
 272      test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
 273      test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
 274
 275
 276 enum {
 277         ATM_DF_REMOVED,         /* device was removed from atm_devs list */
 278 };
 279
 280
 281 #define ATM_PHY_SIG_LOST    0   /* no carrier/light */
 282 #define ATM_PHY_SIG_UNKNOWN 1   /* carrier/light status is unknown */
 283 #define ATM_PHY_SIG_FOUND   2   /* carrier/light okay */
 284
 285 #define ATM_ATMOPT_CLP  1       /* set CLP bit */
 286
 287 struct atm_vcc {
 288         /* struct sock has to be the first member of atm_vcc */
 289         struct sock     sk;
 290         unsigned long   flags;          /* VCC flags (ATM_VF_*) */
 291         short           vpi;            /* VPI and VCI (types must be equal */
 292                                         /* with sockaddr) */
 293         int             vci;
 294         unsigned long   aal_options;    /* AAL layer options */
 295         unsigned long   atm_options;    /* ATM layer options */
 296         struct atm_dev  *dev;           /* device back pointer */
 297         struct atm_qos  qos;            /* QOS */
 298         struct atm_sap  sap;            /* SAP */
 299         void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
 300         void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
 301         int (*push_oam)(struct atm_vcc *vcc,void *cell);
 302         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 303         void            *dev_data;      /* per-device data */
 304         void            *proto_data;    /* per-protocol data */
 305         struct k_atm_aal_stats *stats;  /* pointer to AAL stats group */
 306         /* SVC part --- may move later ------------------------------------- */
 307         short           itf;            /* interface number */
 308         struct sockaddr_atmsvc local;
 309         struct sockaddr_atmsvc remote;
 310         /* Multipoint part ------------------------------------------------- */
 311         struct atm_vcc  *session;       /* session VCC descriptor */
 312         /* Other stuff ----------------------------------------------------- */
 313         void            *user_back;     /* user backlink - not touched by */
 314                                         /* native ATM stack. Currently used */
 315                                         /* by CLIP and sch_atm. */
 316 };
 317
 318 static inline struct atm_vcc *atm_sk(struct sock *sk)
 319 {
 320         return (struct atm_vcc *)sk;
 321 }
 322
 323 static inline struct atm_vcc *ATM_SD(struct socket *sock)
 324 {
 325         return atm_sk(sock->sk);
 326 }
 327
 328 static inline struct sock *sk_atm(struct atm_vcc *vcc)
 329 {
 330         return (struct sock *)vcc;
 331 }
 332
 333 struct atm_dev_addr {
 334         struct sockaddr_atmsvc addr;    /* ATM address */
 335         struct list_head entry;         /* next address */
 336 };
 337
 338 enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
 339
 340 struct atm_dev {
 341         const struct atmdev_ops *ops;   /* device operations; NULL if unused */
 342         const struct atmphy_ops *phy;   /* PHY operations, may be undefined */
 343                                         /* (NULL) */
 344         const char      *type;          /* device type name */
 345         int             number;         /* device index */
 346         void            *dev_data;      /* per-device data */
 347         void            *phy_data;      /* private PHY date */
 348         unsigned long   flags;          /* device flags (ATM_DF_*) */
 349         struct list_head local;         /* local ATM addresses */
 350         struct list_head lecs;          /* LECS ATM addresses learned via ILMI */
 351         unsigned char   esi[ESI_LEN];   /* ESI ("MAC" addr) */
 352         struct atm_cirange ci_range;    /* VPI/VCI range */
 353         struct k_atm_dev_stats stats;   /* statistics */
 354         char            signal;         /* signal status (ATM_PHY_SIG_*) */
 355         int             link_rate;      /* link rate (default: OC3) */
 356         atomic_t        refcnt;         /* reference count */
 357         spinlock_t      lock;           /* protect internal members */
 358 #ifdef CONFIG_PROC_FS
 359         struct proc_dir_entry *proc_entry; /* proc entry */
 360         char *proc_name;                /* proc entry name */
 361 #endif
 362         struct class_device class_dev;  /* sysfs class device */
 363         struct list_head dev_list;      /* linkage */
 364 };
 365
 366
 367 /* OF: send_Oam Flags */
 368
 369 #define ATM_OF_IMMED  1         /* Attempt immediate delivery */
 370 #define ATM_OF_INRATE 2         /* Attempt in-rate delivery */
 371
 372
 373 /*
 374  * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
 375  */
 376
 377 struct atmdev_ops { /* only send is required */
 378         void (*dev_close)(struct atm_dev *dev);
 379         int (*open)(struct atm_vcc *vcc);
 380         void (*close)(struct atm_vcc *vcc);
 381         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 382         int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
 383             void __user *optval,int optlen);
 384         int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
 385             void __user *optval,int optlen);
 386         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 387         int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
 388         void (*phy_put)(struct atm_dev *dev,unsigned char value,
 389             unsigned long addr);
 390         unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
 391         int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
 392         int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
 393         struct module *owner;
 394 };
 395
 396 struct atmphy_ops {
 397         int (*start)(struct atm_dev *dev);
 398         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 399         void (*interrupt)(struct atm_dev *dev);
 400         int (*stop)(struct atm_dev *dev);
 401 };
 402
 403 struct atm_skb_data {
 404         struct atm_vcc  *vcc;           /* ATM VCC */
 405         unsigned long   atm_options;    /* ATM layer options */
 406 };
 407
 408 #define VCC_HTABLE_SIZE 32
 409
 410 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
 411 extern rwlock_t vcc_sklist_lock;
 412
 413 #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
 414
 415 struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops,
 416     int number,unsigned long *flags); /* number == -1: pick first available */
 417 struct atm_dev *atm_dev_lookup(int number);
 418 void atm_dev_deregister(struct atm_dev *dev);
 419 void vcc_insert_socket(struct sock *sk);
 420
 421
 422 /*
 423  * This is approximately the algorithm used by alloc_skb.
 424  *
 425  */
 426
 427 static inline int atm_guess_pdu2truesize(int size)
 428 {
 429         return (SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info));
 430 }
 431
 432
 433 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
 434 {
 435         atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 436 }
 437
 438
 439 static inline void atm_return(struct atm_vcc *vcc,int truesize)
 440 {
 441         atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 442 }
 443
 444
 445 static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
 446 {
 447         return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
 448                sk_atm(vcc)->sk_sndbuf;
 449 }
 450
 451
 452 static inline void atm_dev_hold(struct atm_dev *dev)
 453 {
 454         atomic_inc(&dev->refcnt);
 455 }
 456
 457
 458 static inline void atm_dev_put(struct atm_dev *dev)
 459 {
 460         if (atomic_dec_and_test(&dev->refcnt)) {
 461                 BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
 462                 if (dev->ops->dev_close)
 463                         dev->ops->dev_close(dev);
 464                 class_device_put(&dev->class_dev);
 465         }
 466 }
 467
 468
 469 int atm_charge(struct atm_vcc *vcc,int truesize);
 470 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
 471     gfp_t gfp_flags);
 472 int atm_pcr_goal(const struct atm_trafprm *tp);
 473
 474 void vcc_release_async(struct atm_vcc *vcc, int reply);
 475
 476 struct atm_ioctl {
 477         struct module *owner;
 478         /* A module reference is kept if appropriate over this call.
 479          * Return -ENOIOCTLCMD if you don't handle it. */
 480         int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
 481         struct list_head list;
 482 };
 483
 484 /**
 485  * register_atm_ioctl - register handler for ioctl operations
 486  *
 487  * Special (non-device) handlers of ioctl's should
 488  * register here. If you're a normal device, you should
 489  * set .ioctl in your atmdev_ops instead.
 490  */
 491 void register_atm_ioctl(struct atm_ioctl *);
 492
 493 /**
 494  * deregister_atm_ioctl - remove the ioctl handler
 495  */
 496 void deregister_atm_ioctl(struct atm_ioctl *);
 497
 498 #endif /* __KERNEL__ */
 499
 500 #endif