include/linux/mISDNif.h

   1 /*
   2  *
   3  * Author       Karsten Keil <kkeil@novell.com>
   4  *
   5  * Copyright 2008  by Karsten Keil <kkeil@novell.com>
   6  *
   7  * This code is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE
   9  * version 2.1 as published by the Free Software Foundation.
  10  *
  11  * This code is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU LESSER GENERAL PUBLIC LICENSE for more details.
  15  *
  16  */
  17
  18 #ifndef mISDNIF_H
  19 #define mISDNIF_H
  20
  21 #include <stdarg.h>
  22 #include <linux/types.h>
  23 #include <linux/errno.h>
  24 #include <linux/socket.h>
  25
  26 /*
  27  * ABI Version 32 bit
  28  *
  29  * <8 bit> Major version
  30  *              - changed if any interface become backwards incompatible
  31  *
  32  * <8 bit> Minor version
  33  *              - changed if any interface is extended but backwards compatible
  34  *
  35  * <16 bit> Release number
  36  *              - should be incremented on every checkin
  37  */
  38 #define MISDN_MAJOR_VERSION     1
  39 #define MISDN_MINOR_VERSION     1
  40 #define MISDN_RELEASE           29
  41
  42 /* primitives for information exchange
  43  * generell format
  44  * <16  bit  0 >
  45  * <8  bit command>
  46  *    BIT 8 = 1 LAYER private
  47  *    BIT 7 = 1 answer
  48  *    BIT 6 = 1 DATA
  49  * <8  bit target layer mask>
  50  *
  51  * Layer = 00 is reserved for general commands
  52    Layer = 01  L2 -> HW
  53    Layer = 02  HW -> L2
  54    Layer = 04  L3 -> L2
  55    Layer = 08  L2 -> L3
  56  * Layer = FF is reserved for broadcast commands
  57  */
  58
  59 #define MISDN_CMDMASK           0xff00
  60 #define MISDN_LAYERMASK         0x00ff
  61
  62 /* generell commands */
  63 #define OPEN_CHANNEL            0x0100
  64 #define CLOSE_CHANNEL           0x0200
  65 #define CONTROL_CHANNEL         0x0300
  66 #define CHECK_DATA              0x0400
  67
  68 /* layer 2 -> layer 1 */
  69 #define PH_ACTIVATE_REQ         0x0101
  70 #define PH_DEACTIVATE_REQ       0x0201
  71 #define PH_DATA_REQ             0x2001
  72 #define MPH_ACTIVATE_REQ        0x0501
  73 #define MPH_DEACTIVATE_REQ      0x0601
  74 #define MPH_INFORMATION_REQ     0x0701
  75 #define PH_CONTROL_REQ          0x0801
  76
  77 /* layer 1 -> layer 2 */
  78 #define PH_ACTIVATE_IND         0x0102
  79 #define PH_ACTIVATE_CNF         0x4102
  80 #define PH_DEACTIVATE_IND       0x0202
  81 #define PH_DEACTIVATE_CNF       0x4202
  82 #define PH_DATA_IND             0x2002
  83 #define PH_DATA_E_IND           0x3002
  84 #define MPH_ACTIVATE_IND        0x0502
  85 #define MPH_DEACTIVATE_IND      0x0602
  86 #define MPH_INFORMATION_IND     0x0702
  87 #define PH_DATA_CNF             0x6002
  88 #define PH_CONTROL_IND          0x0802
  89 #define PH_CONTROL_CNF          0x4802
  90
  91 /* layer 3 -> layer 2 */
  92 #define DL_ESTABLISH_REQ        0x1004
  93 #define DL_RELEASE_REQ          0x1104
  94 #define DL_DATA_REQ             0x3004
  95 #define DL_UNITDATA_REQ         0x3104
  96 #define DL_INFORMATION_REQ      0x0004
  97
  98 /* layer 2 -> layer 3 */
  99 #define DL_ESTABLISH_IND        0x1008
 100 #define DL_ESTABLISH_CNF        0x5008
 101 #define DL_RELEASE_IND          0x1108
 102 #define DL_RELEASE_CNF          0x5108
 103 #define DL_DATA_IND             0x3008
 104 #define DL_UNITDATA_IND         0x3108
 105 #define DL_INFORMATION_IND      0x0008
 106
 107 /* intern layer 2 management */
 108 #define MDL_ASSIGN_REQ          0x1804
 109 #define MDL_ASSIGN_IND          0x1904
 110 #define MDL_REMOVE_REQ          0x1A04
 111 #define MDL_REMOVE_IND          0x1B04
 112 #define MDL_STATUS_UP_IND       0x1C04
 113 #define MDL_STATUS_DOWN_IND     0x1D04
 114 #define MDL_STATUS_UI_IND       0x1E04
 115 #define MDL_ERROR_IND           0x1F04
 116 #define MDL_ERROR_RSP           0x5F04
 117
 118 /* intern layer 2 */
 119 #define DL_TIMER200_IND         0x7004
 120 #define DL_TIMER203_IND         0x7304
 121 #define DL_INTERN_MSG           0x7804
 122
 123 /* DL_INFORMATION_IND types */
 124 #define DL_INFO_L2_CONNECT      0x0001
 125 #define DL_INFO_L2_REMOVED      0x0002
 126
 127 /* PH_CONTROL types */
 128 /* TOUCH TONE IS 0x20XX  XX "0"..."9", "A","B","C","D","*","#" */
 129 #define DTMF_TONE_VAL           0x2000
 130 #define DTMF_TONE_MASK          0x007F
 131 #define DTMF_TONE_START         0x2100
 132 #define DTMF_TONE_STOP          0x2200
 133 #define DTMF_HFC_COEF           0x4000
 134 #define DSP_CONF_JOIN           0x2403
 135 #define DSP_CONF_SPLIT          0x2404
 136 #define DSP_RECEIVE_OFF         0x2405
 137 #define DSP_RECEIVE_ON          0x2406
 138 #define DSP_ECHO_ON             0x2407
 139 #define DSP_ECHO_OFF            0x2408
 140 #define DSP_MIX_ON              0x2409
 141 #define DSP_MIX_OFF             0x240a
 142 #define DSP_DELAY               0x240b
 143 #define DSP_JITTER              0x240c
 144 #define DSP_TXDATA_ON           0x240d
 145 #define DSP_TXDATA_OFF          0x240e
 146 #define DSP_TX_DEJITTER         0x240f
 147 #define DSP_TX_DEJ_OFF          0x2410
 148 #define DSP_TONE_PATT_ON        0x2411
 149 #define DSP_TONE_PATT_OFF       0x2412
 150 #define DSP_VOL_CHANGE_TX       0x2413
 151 #define DSP_VOL_CHANGE_RX       0x2414
 152 #define DSP_BF_ENABLE_KEY       0x2415
 153 #define DSP_BF_DISABLE          0x2416
 154 #define DSP_BF_ACCEPT           0x2416
 155 #define DSP_BF_REJECT           0x2417
 156 #define DSP_PIPELINE_CFG        0x2418
 157 #define HFC_VOL_CHANGE_TX       0x2601
 158 #define HFC_VOL_CHANGE_RX       0x2602
 159 #define HFC_SPL_LOOP_ON         0x2603
 160 #define HFC_SPL_LOOP_OFF        0x2604
 161 /* for T30 FAX and analog modem */
 162 #define HW_MOD_FRM              0x4000
 163 #define HW_MOD_FRH              0x4001
 164 #define HW_MOD_FTM              0x4002
 165 #define HW_MOD_FTH              0x4003
 166 #define HW_MOD_FTS              0x4004
 167 #define HW_MOD_CONNECT          0x4010
 168 #define HW_MOD_OK               0x4011
 169 #define HW_MOD_NOCARR           0x4012
 170 #define HW_MOD_FCERROR          0x4013
 171 #define HW_MOD_READY            0x4014
 172 #define HW_MOD_LASTDATA         0x4015
 173
 174 /* DSP_TONE_PATT_ON parameter */
 175 #define TONE_OFF                        0x0000
 176 #define TONE_GERMAN_DIALTONE            0x0001
 177 #define TONE_GERMAN_OLDDIALTONE         0x0002
 178 #define TONE_AMERICAN_DIALTONE          0x0003
 179 #define TONE_GERMAN_DIALPBX             0x0004
 180 #define TONE_GERMAN_OLDDIALPBX          0x0005
 181 #define TONE_AMERICAN_DIALPBX           0x0006
 182 #define TONE_GERMAN_RINGING             0x0007
 183 #define TONE_GERMAN_OLDRINGING          0x0008
 184 #define TONE_AMERICAN_RINGPBX           0x000b
 185 #define TONE_GERMAN_RINGPBX             0x000c
 186 #define TONE_GERMAN_OLDRINGPBX          0x000d
 187 #define TONE_AMERICAN_RINGING           0x000e
 188 #define TONE_GERMAN_BUSY                0x000f
 189 #define TONE_GERMAN_OLDBUSY             0x0010
 190 #define TONE_AMERICAN_BUSY              0x0011
 191 #define TONE_GERMAN_HANGUP              0x0012
 192 #define TONE_GERMAN_OLDHANGUP           0x0013
 193 #define TONE_AMERICAN_HANGUP            0x0014
 194 #define TONE_SPECIAL_INFO               0x0015
 195 #define TONE_GERMAN_GASSENBESETZT       0x0016
 196 #define TONE_GERMAN_AUFSCHALTTON        0x0016
 197
 198 /* MPH_INFORMATION_IND */
 199 #define L1_SIGNAL_LOS_OFF       0x0010
 200 #define L1_SIGNAL_LOS_ON        0x0011
 201 #define L1_SIGNAL_AIS_OFF       0x0012
 202 #define L1_SIGNAL_AIS_ON        0x0013
 203 #define L1_SIGNAL_RDI_OFF       0x0014
 204 #define L1_SIGNAL_RDI_ON        0x0015
 205 #define L1_SIGNAL_SLIP_RX       0x0020
 206 #define L1_SIGNAL_SLIP_TX       0x0021
 207
 208 /*
 209  * protocol ids
 210  * D channel 1-31
 211  * B channel 33 - 63
 212  */
 213
 214 #define ISDN_P_NONE             0
 215 #define ISDN_P_BASE             0
 216 #define ISDN_P_TE_S0            0x01
 217 #define ISDN_P_NT_S0            0x02
 218 #define ISDN_P_TE_E1            0x03
 219 #define ISDN_P_NT_E1            0x04
 220 #define ISDN_P_TE_UP0           0x05
 221 #define ISDN_P_NT_UP0           0x06
 222
 223 #define IS_ISDN_P_TE(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_TE_E1) || \
 224                                 (p == ISDN_P_TE_UP0) || (p == ISDN_P_LAPD_TE))
 225 #define IS_ISDN_P_NT(p) ((p == ISDN_P_NT_S0) || (p == ISDN_P_NT_E1) || \
 226                                 (p == ISDN_P_NT_UP0) || (p == ISDN_P_LAPD_NT))
 227 #define IS_ISDN_P_S0(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_NT_S0))
 228 #define IS_ISDN_P_E1(p) ((p == ISDN_P_TE_E1) || (p == ISDN_P_NT_E1))
 229 #define IS_ISDN_P_UP0(p) ((p == ISDN_P_TE_UP0) || (p == ISDN_P_NT_UP0))
 230
 231
 232 #define ISDN_P_LAPD_TE          0x10
 233 #define ISDN_P_LAPD_NT          0x11
 234
 235 #define ISDN_P_B_MASK           0x1f
 236 #define ISDN_P_B_START          0x20
 237
 238 #define ISDN_P_B_RAW            0x21
 239 #define ISDN_P_B_HDLC           0x22
 240 #define ISDN_P_B_X75SLP         0x23
 241 #define ISDN_P_B_L2DTMF         0x24
 242 #define ISDN_P_B_L2DSP          0x25
 243 #define ISDN_P_B_L2DSPHDLC      0x26
 244 #define ISDN_P_B_T30_FAX        0x27
 245 #define ISDN_P_B_MODEM_ASYNC    0x28
 246
 247 #define OPTION_L2_PMX           1
 248 #define OPTION_L2_PTP           2
 249 #define OPTION_L2_FIXEDTEI      3
 250 #define OPTION_L2_CLEANUP       4
 251 #define OPTION_L1_HOLD          5
 252
 253 /* should be in sync with linux/kobject.h:KOBJ_NAME_LEN */
 254 #define MISDN_MAX_IDLEN         20
 255
 256 struct mISDNhead {
 257         unsigned int    prim;
 258         unsigned int    id;
 259 }  __packed;
 260
 261 #define MISDN_HEADER_LEN        sizeof(struct mISDNhead)
 262 #define MAX_DATA_SIZE           2048
 263 #define MAX_DATA_MEM            (MAX_DATA_SIZE + MISDN_HEADER_LEN)
 264 #define MAX_DFRAME_LEN          260
 265
 266 #define MISDN_ID_ADDR_MASK      0xFFFF
 267 #define MISDN_ID_TEI_MASK       0xFF00
 268 #define MISDN_ID_SAPI_MASK      0x00FF
 269 #define MISDN_ID_TEI_ANY        0x7F00
 270
 271 #define MISDN_ID_ANY            0xFFFF
 272 #define MISDN_ID_NONE           0xFFFE
 273
 274 #define GROUP_TEI               127
 275 #define TEI_SAPI                63
 276 #define CTRL_SAPI               0
 277
 278 #define MISDN_MAX_CHANNEL       127
 279 #define MISDN_CHMAP_SIZE        ((MISDN_MAX_CHANNEL + 1) >> 3)
 280
 281 #define SOL_MISDN       0
 282
 283 struct sockaddr_mISDN {
 284         sa_family_t    family;
 285         unsigned char   dev;
 286         unsigned char   channel;
 287         unsigned char   sapi;
 288         unsigned char   tei;
 289 };
 290
 291 struct mISDNversion {
 292         unsigned char   major;
 293         unsigned char   minor;
 294         unsigned short  release;
 295 };
 296
 297 struct mISDN_devinfo {
 298         u_int                   id;
 299         u_int                   Dprotocols;
 300         u_int                   Bprotocols;
 301         u_int                   protocol;
 302         u_char                  channelmap[MISDN_CHMAP_SIZE];
 303         u_int                   nrbchan;
 304         char                    name[MISDN_MAX_IDLEN];
 305 };
 306
 307 struct mISDN_devrename {
 308         u_int                   id;
 309         char                    name[MISDN_MAX_IDLEN]; /* new name */
 310 };
 311
 312 /* MPH_INFORMATION_REQ payload */
 313 struct ph_info_ch {
 314         __u32 protocol;
 315         __u64 Flags;
 316 };
 317
 318 struct ph_info_dch {
 319         struct ph_info_ch ch;
 320         __u16 state;
 321         __u16 num_bch;
 322 };
 323
 324 struct ph_info {
 325         struct ph_info_dch dch;
 326         struct ph_info_ch  bch[];
 327 };
 328
 329 /* timer device ioctl */
 330 #define IMADDTIMER      _IOR('I', 64, int)
 331 #define IMDELTIMER      _IOR('I', 65, int)
 332
 333 /* socket ioctls */
 334 #define IMGETVERSION    _IOR('I', 66, int)
 335 #define IMGETCOUNT      _IOR('I', 67, int)
 336 #define IMGETDEVINFO    _IOR('I', 68, int)
 337 #define IMCTRLREQ       _IOR('I', 69, int)
 338 #define IMCLEAR_L2      _IOR('I', 70, int)
 339 #define IMSETDEVNAME    _IOR('I', 71, struct mISDN_devrename)
 340 #define IMHOLD_L1       _IOR('I', 72, int)
 341
 342 static inline int
 343 test_channelmap(u_int nr, u_char *map)
 344 {
 345         if (nr <= MISDN_MAX_CHANNEL)
 346                 return map[nr >> 3] & (1 << (nr & 7));
 347         else
 348                 return 0;
 349 }
 350
 351 static inline void
 352 set_channelmap(u_int nr, u_char *map)
 353 {
 354         map[nr >> 3] |= (1 << (nr & 7));
 355 }
 356
 357 static inline void
 358 clear_channelmap(u_int nr, u_char *map)
 359 {
 360         map[nr >> 3] &= ~(1 << (nr & 7));
 361 }
 362
 363 /* CONTROL_CHANNEL parameters */
 364 #define MISDN_CTRL_GETOP                0x0000
 365 #define MISDN_CTRL_LOOP                 0x0001
 366 #define MISDN_CTRL_CONNECT              0x0002
 367 #define MISDN_CTRL_DISCONNECT           0x0004
 368 #define MISDN_CTRL_RX_BUFFER            0x0008
 369 #define MISDN_CTRL_PCMCONNECT           0x0010
 370 #define MISDN_CTRL_PCMDISCONNECT        0x0020
 371 #define MISDN_CTRL_SETPEER              0x0040
 372 #define MISDN_CTRL_UNSETPEER            0x0080
 373 #define MISDN_CTRL_RX_OFF               0x0100
 374 #define MISDN_CTRL_FILL_EMPTY           0x0200
 375 #define MISDN_CTRL_GETPEER              0x0400
 376 #define MISDN_CTRL_L1_TIMER3            0x0800
 377 #define MISDN_CTRL_HW_FEATURES_OP       0x2000
 378 #define MISDN_CTRL_HW_FEATURES          0x2001
 379 #define MISDN_CTRL_HFC_OP               0x4000
 380 #define MISDN_CTRL_HFC_PCM_CONN         0x4001
 381 #define MISDN_CTRL_HFC_PCM_DISC         0x4002
 382 #define MISDN_CTRL_HFC_CONF_JOIN        0x4003
 383 #define MISDN_CTRL_HFC_CONF_SPLIT       0x4004
 384 #define MISDN_CTRL_HFC_RECEIVE_OFF      0x4005
 385 #define MISDN_CTRL_HFC_RECEIVE_ON       0x4006
 386 #define MISDN_CTRL_HFC_ECHOCAN_ON       0x4007
 387 #define MISDN_CTRL_HFC_ECHOCAN_OFF      0x4008
 388 #define MISDN_CTRL_HFC_WD_INIT          0x4009
 389 #define MISDN_CTRL_HFC_WD_RESET         0x400A
 390
 391 /* special RX buffer value for MISDN_CTRL_RX_BUFFER request.p1 is the minimum
 392  * buffer size request.p2 the maximum. Using  MISDN_CTRL_RX_SIZE_IGNORE will
 393  * not change the value, but still read back the actual stetting.
 394  */
 395 #define MISDN_CTRL_RX_SIZE_IGNORE       -1
 396
 397 /* socket options */
 398 #define MISDN_TIME_STAMP                0x0001
 399
 400 struct mISDN_ctrl_req {
 401         int             op;
 402         int             channel;
 403         int             p1;
 404         int             p2;
 405 };
 406
 407 /* muxer options */
 408 #define MISDN_OPT_ALL           1
 409 #define MISDN_OPT_TEIMGR        2
 410
 411 #ifdef __KERNEL__
 412 #include <linux/list.h>
 413 #include <linux/skbuff.h>
 414 #include <linux/net.h>
 415 #include <net/sock.h>
 416 #include <linux/completion.h>
 417
 418 #define DEBUG_CORE              0x000000ff
 419 #define DEBUG_CORE_FUNC         0x00000002
 420 #define DEBUG_SOCKET            0x00000004
 421 #define DEBUG_MANAGER           0x00000008
 422 #define DEBUG_SEND_ERR          0x00000010
 423 #define DEBUG_MSG_THREAD        0x00000020
 424 #define DEBUG_QUEUE_FUNC        0x00000040
 425 #define DEBUG_L1                0x0000ff00
 426 #define DEBUG_L1_FSM            0x00000200
 427 #define DEBUG_L2                0x00ff0000
 428 #define DEBUG_L2_FSM            0x00020000
 429 #define DEBUG_L2_CTRL           0x00040000
 430 #define DEBUG_L2_RECV           0x00080000
 431 #define DEBUG_L2_TEI            0x00100000
 432 #define DEBUG_L2_TEIFSM         0x00200000
 433 #define DEBUG_TIMER             0x01000000
 434 #define DEBUG_CLOCK             0x02000000
 435
 436 #define mISDN_HEAD_P(s)         ((struct mISDNhead *)&s->cb[0])
 437 #define mISDN_HEAD_PRIM(s)      (((struct mISDNhead *)&s->cb[0])->prim)
 438 #define mISDN_HEAD_ID(s)        (((struct mISDNhead *)&s->cb[0])->id)
 439
 440 /* socket states */
 441 #define MISDN_OPEN      1
 442 #define MISDN_BOUND     2
 443 #define MISDN_CLOSED    3
 444
 445 struct mISDNchannel;
 446 struct mISDNdevice;
 447 struct mISDNstack;
 448 struct mISDNclock;
 449
 450 struct channel_req {
 451         u_int                   protocol;
 452         struct sockaddr_mISDN   adr;
 453         struct mISDNchannel     *ch;
 454 };
 455
 456 typedef int     (ctrl_func_t)(struct mISDNchannel *, u_int, void *);
 457 typedef int     (send_func_t)(struct mISDNchannel *, struct sk_buff *);
 458 typedef int     (create_func_t)(struct channel_req *);
 459
 460 struct Bprotocol {
 461         struct list_head        list;
 462         char                    *name;
 463         u_int                   Bprotocols;
 464         create_func_t           *create;
 465 };
 466
 467 struct mISDNchannel {
 468         struct list_head        list;
 469         u_int                   protocol;
 470         u_int                   nr;
 471         u_long                  opt;
 472         u_int                   addr;
 473         struct mISDNstack       *st;
 474         struct mISDNchannel     *peer;
 475         send_func_t             *send;
 476         send_func_t             *recv;
 477         ctrl_func_t             *ctrl;
 478 };
 479
 480 struct mISDN_sock_list {
 481         struct hlist_head       head;
 482         rwlock_t                lock;
 483 };
 484
 485 struct mISDN_sock {
 486         struct sock             sk;
 487         struct mISDNchannel     ch;
 488         u_int                   cmask;
 489         struct mISDNdevice      *dev;
 490 };
 491
 492
 493
 494 struct mISDNdevice {
 495         struct mISDNchannel     D;
 496         u_int                   id;
 497         u_int                   Dprotocols;
 498         u_int                   Bprotocols;
 499         u_int                   nrbchan;
 500         u_char                  channelmap[MISDN_CHMAP_SIZE];
 501         struct list_head        bchannels;
 502         struct mISDNchannel     *teimgr;
 503         struct device           dev;
 504 };
 505
 506 struct mISDNstack {
 507         u_long                  status;
 508         struct mISDNdevice      *dev;
 509         struct task_struct      *thread;
 510         struct completion       *notify;
 511         wait_queue_head_t       workq;
 512         struct sk_buff_head     msgq;
 513         struct list_head        layer2;
 514         struct mISDNchannel     *layer1;
 515         struct mISDNchannel     own;
 516         struct mutex            lmutex; /* protect lists */
 517         struct mISDN_sock_list  l1sock;
 518 #ifdef MISDN_MSG_STATS
 519         u_int                   msg_cnt;
 520         u_int                   sleep_cnt;
 521         u_int                   stopped_cnt;
 522 #endif
 523 };
 524
 525 typedef int     (clockctl_func_t)(void *, int);
 526
 527 struct  mISDNclock {
 528         struct list_head        list;
 529         char                    name[64];
 530         int                     pri;
 531         clockctl_func_t         *ctl;
 532         void                    *priv;
 533 };
 534
 535 /* global alloc/queue functions */
 536
 537 static inline struct sk_buff *
 538 mI_alloc_skb(unsigned int len, gfp_t gfp_mask)
 539 {
 540         struct sk_buff  *skb;
 541
 542         skb = alloc_skb(len + MISDN_HEADER_LEN, gfp_mask);
 543         if (likely(skb))
 544                 skb_reserve(skb, MISDN_HEADER_LEN);
 545         return skb;
 546 }
 547
 548 static inline struct sk_buff *
 549 _alloc_mISDN_skb(u_int prim, u_int id, u_int len, void *dp, gfp_t gfp_mask)
 550 {
 551         struct sk_buff  *skb = mI_alloc_skb(len, gfp_mask);
 552         struct mISDNhead *hh;
 553
 554         if (!skb)
 555                 return NULL;
 556         if (len)
 557                 skb_put_data(skb, dp, len);
 558         hh = mISDN_HEAD_P(skb);
 559         hh->prim = prim;
 560         hh->id = id;
 561         return skb;
 562 }
 563
 564 static inline void
 565 _queue_data(struct mISDNchannel *ch, u_int prim,
 566     u_int id, u_int len, void *dp, gfp_t gfp_mask)
 567 {
 568         struct sk_buff          *skb;
 569
 570         if (!ch->peer)
 571                 return;
 572         skb = _alloc_mISDN_skb(prim, id, len, dp, gfp_mask);
 573         if (!skb)
 574                 return;
 575         if (ch->recv(ch->peer, skb))
 576                 dev_kfree_skb(skb);
 577 }
 578
 579 /* global register/unregister functions */
 580
 581 extern int      mISDN_register_device(struct mISDNdevice *,
 582                                         struct device *parent, char *name);
 583 extern void     mISDN_unregister_device(struct mISDNdevice *);
 584 extern int      mISDN_register_Bprotocol(struct Bprotocol *);
 585 extern void     mISDN_unregister_Bprotocol(struct Bprotocol *);
 586 extern struct mISDNclock *mISDN_register_clock(char *, int, clockctl_func_t *,
 587                                                 void *);
 588 extern void     mISDN_unregister_clock(struct mISDNclock *);
 589
 590 static inline struct mISDNdevice *dev_to_mISDN(struct device *dev)
 591 {
 592         if (dev)
 593                 return dev_get_drvdata(dev);
 594         else
 595                 return NULL;
 596 }
 597
 598 extern void     set_channel_address(struct mISDNchannel *, u_int, u_int);
 599 extern void     mISDN_clock_update(struct mISDNclock *, int, ktime_t *);
 600 extern unsigned short mISDN_clock_get(void);
 601 extern const char *mISDNDevName4ch(struct mISDNchannel *);
 602
 603 #endif /* __KERNEL__ */
 604 #endif /* mISDNIF_H */