| 1 | /* |
| 2 | * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * |
| 13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 23 | * SUCH DAMAGE. |
| 24 | * |
| 25 | *--------------------------------------------------------------------------- |
| 26 | * |
| 27 | * i4b_rbch.c - device driver for raw B channel data |
| 28 | * --------------------------------------------------- |
| 29 | * |
| 30 | * $FreeBSD: src/sys/i4b/driver/i4b_rbch.c,v 1.10.2.3 2001/08/12 16:22:48 hm Exp $ |
| 31 | * $DragonFly: src/sys/net/i4b/driver/i4b_rbch.c,v 1.5 2003/07/21 07:57:46 dillon Exp $ |
| 32 | * |
| 33 | * last edit-date: [Sat Aug 11 18:06:57 2001] |
| 34 | * |
| 35 | *---------------------------------------------------------------------------*/ |
| 36 | |
| 37 | #include "i4brbch.h" |
| 38 | |
| 39 | #if NI4BRBCH > 0 |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | |
| 44 | #include <sys/conf.h> |
| 45 | #include <sys/uio.h> |
| 46 | #include <sys/kernel.h> |
| 47 | #include <sys/mbuf.h> |
| 48 | #include <sys/socket.h> |
| 49 | #include <net/if.h> |
| 50 | #include <sys/tty.h> |
| 51 | |
| 52 | #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 |
| 53 | #include <sys/callout.h> |
| 54 | #endif |
| 55 | |
| 56 | #if defined (__NetBSD__) || defined (__OpenBSD__) |
| 57 | extern cc_t ttydefchars; |
| 58 | #define termioschars(t) memcpy((t)->c_cc, &ttydefchars, sizeof((t)->c_cc)) |
| 59 | #endif |
| 60 | |
| 61 | #ifdef __FreeBSD__ |
| 62 | |
| 63 | #ifdef DEVFS |
| 64 | #include <sys/devfsext.h> |
| 65 | #endif |
| 66 | |
| 67 | #endif /* __FreeBSD__ */ |
| 68 | |
| 69 | #ifdef __NetBSD__ |
| 70 | #include <sys/filio.h> |
| 71 | #endif |
| 72 | |
| 73 | #ifdef __FreeBSD__ |
| 74 | #include <machine/i4b_ioctl.h> |
| 75 | #include <machine/i4b_rbch_ioctl.h> |
| 76 | #include <machine/i4b_debug.h> |
| 77 | #else |
| 78 | #include <i4b/i4b_ioctl.h> |
| 79 | #include <i4b/i4b_rbch_ioctl.h> |
| 80 | #include <i4b/i4b_debug.h> |
| 81 | #endif |
| 82 | |
| 83 | #include <i4b/include/i4b_global.h> |
| 84 | #include <i4b/include/i4b_mbuf.h> |
| 85 | #include <i4b/include/i4b_l3l4.h> |
| 86 | |
| 87 | #include <i4b/layer4/i4b_l4.h> |
| 88 | |
| 89 | #ifdef __bsdi__ |
| 90 | #include <sys/device.h> |
| 91 | #endif |
| 92 | |
| 93 | #ifdef OS_USES_POLL |
| 94 | #include <sys/ioccom.h> |
| 95 | #include <sys/poll.h> |
| 96 | #else |
| 97 | #include <sys/fcntl.h> |
| 98 | #include <sys/ioctl.h> |
| 99 | #endif |
| 100 | |
| 101 | #if defined(__FreeBSD__) |
| 102 | #include <sys/filio.h> |
| 103 | #endif |
| 104 | |
| 105 | static drvr_link_t rbch_drvr_linktab[NI4BRBCH]; |
| 106 | static isdn_link_t *isdn_linktab[NI4BRBCH]; |
| 107 | |
| 108 | #define I4BRBCHACCT 1 /* enable accounting messages */ |
| 109 | #define I4BRBCHACCTINTVL 2 /* accounting msg interval in secs */ |
| 110 | |
| 111 | static struct rbch_softc { |
| 112 | |
| 113 | int sc_unit; /* unit number */ |
| 114 | |
| 115 | int sc_devstate; /* state of driver */ |
| 116 | #define ST_IDLE 0x00 |
| 117 | #define ST_CONNECTED 0x01 |
| 118 | #define ST_ISOPEN 0x02 |
| 119 | #define ST_RDWAITDATA 0x04 |
| 120 | #define ST_WRWAITEMPTY 0x08 |
| 121 | #define ST_NOBLOCK 0x10 |
| 122 | |
| 123 | int sc_bprot; /* B-ch protocol used */ |
| 124 | |
| 125 | call_desc_t *sc_cd; /* Call Descriptor */ |
| 126 | |
| 127 | struct termios it_in; |
| 128 | |
| 129 | struct ifqueue sc_hdlcq; /* hdlc read queue */ |
| 130 | #define I4BRBCHMAXQLEN 10 |
| 131 | |
| 132 | struct selinfo selp; /* select / poll */ |
| 133 | |
| 134 | #if I4BRBCHACCT |
| 135 | #if defined(__FreeBSD__) |
| 136 | struct callout_handle sc_callout; |
| 137 | #endif |
| 138 | #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 |
| 139 | struct callout sc_callout; |
| 140 | #endif |
| 141 | |
| 142 | int sc_iinb; /* isdn driver # of inbytes */ |
| 143 | int sc_ioutb; /* isdn driver # of outbytes */ |
| 144 | int sc_linb; /* last # of bytes rx'd */ |
| 145 | int sc_loutb; /* last # of bytes tx'd */ |
| 146 | int sc_fn; /* flag, first null acct */ |
| 147 | #endif |
| 148 | } rbch_softc[NI4BRBCH]; |
| 149 | |
| 150 | static void rbch_rx_data_rdy(int unit); |
| 151 | static void rbch_tx_queue_empty(int unit); |
| 152 | static void rbch_connect(int unit, void *cdp); |
| 153 | static void rbch_disconnect(int unit, void *cdp); |
| 154 | static void rbch_init_linktab(int unit); |
| 155 | static void rbch_clrq(int unit); |
| 156 | |
| 157 | #ifndef __FreeBSD__ |
| 158 | #define PDEVSTATIC /* - not static - */ |
| 159 | #define IOCTL_CMD_T u_long |
| 160 | void i4brbchattach __P((void)); |
| 161 | int i4brbchopen __P((dev_t dev, int flag, int fmt, struct proc *p)); |
| 162 | int i4brbchclose __P((dev_t dev, int flag, int fmt, struct proc *p)); |
| 163 | int i4brbchread __P((dev_t dev, struct uio *uio, int ioflag)); |
| 164 | int i4brbchwrite __P((dev_t dev, struct uio *uio, int ioflag)); |
| 165 | int i4brbchioctl __P((dev_t dev, IOCTL_CMD_T cmd, caddr_t arg, int flag, struct proc* pr)); |
| 166 | #ifdef OS_USES_POLL |
| 167 | int i4brbchpoll __P((dev_t dev, int events, struct proc *p)); |
| 168 | #else |
| 169 | PDEVSTATIC int i4brbchselect __P((dev_t dev, int rw, struct proc *p)); |
| 170 | #endif |
| 171 | #endif |
| 172 | |
| 173 | #if BSD > 199306 && defined(__FreeBSD__) |
| 174 | #define PDEVSTATIC static |
| 175 | #define IOCTL_CMD_T u_long |
| 176 | |
| 177 | PDEVSTATIC d_open_t i4brbchopen; |
| 178 | PDEVSTATIC d_close_t i4brbchclose; |
| 179 | PDEVSTATIC d_read_t i4brbchread; |
| 180 | PDEVSTATIC d_read_t i4brbchwrite; |
| 181 | PDEVSTATIC d_ioctl_t i4brbchioctl; |
| 182 | |
| 183 | #ifdef OS_USES_POLL |
| 184 | PDEVSTATIC d_poll_t i4brbchpoll; |
| 185 | #define POLLFIELD i4brbchpoll |
| 186 | #else |
| 187 | PDEVSTATIC d_select_t i4brbchselect; |
| 188 | #define POLLFIELD i4brbchselect |
| 189 | #endif |
| 190 | |
| 191 | #define CDEV_MAJOR 57 |
| 192 | |
| 193 | static struct cdevsw i4brbch_cdevsw = { |
| 194 | /* name */ "i4brbch", |
| 195 | /* maj */ CDEV_MAJOR, |
| 196 | /* flags */ 0, |
| 197 | /* port */ NULL, |
| 198 | /* autoq */ 0, |
| 199 | |
| 200 | /* open */ i4brbchopen, |
| 201 | /* close */ i4brbchclose, |
| 202 | /* read */ i4brbchread, |
| 203 | /* write */ i4brbchwrite, |
| 204 | /* ioctl */ i4brbchioctl, |
| 205 | /* poll */ POLLFIELD, |
| 206 | /* mmap */ nommap, |
| 207 | /* strategy */ nostrategy, |
| 208 | /* dump */ nodump, |
| 209 | /* psize */ nopsize |
| 210 | }; |
| 211 | |
| 212 | static void i4brbchattach(void *); |
| 213 | PSEUDO_SET(i4brbchattach, i4b_rbch); |
| 214 | |
| 215 | /*===========================================================================* |
| 216 | * DEVICE DRIVER ROUTINES |
| 217 | *===========================================================================*/ |
| 218 | |
| 219 | /*---------------------------------------------------------------------------* |
| 220 | * initialization at kernel load time |
| 221 | *---------------------------------------------------------------------------*/ |
| 222 | static void |
| 223 | i4brbchinit(void *unused) |
| 224 | { |
| 225 | cdevsw_add(&i4brbch_cdevsw); |
| 226 | } |
| 227 | |
| 228 | SYSINIT(i4brbchdev, SI_SUB_DRIVERS, |
| 229 | SI_ORDER_MIDDLE+CDEV_MAJOR, &i4brbchinit, NULL); |
| 230 | |
| 231 | #endif /* BSD > 199306 && defined(__FreeBSD__) */ |
| 232 | |
| 233 | #ifdef __bsdi__ |
| 234 | int i4brbchmatch(struct device *parent, struct cfdata *cf, void *aux); |
| 235 | void dummy_i4brbchattach(struct device*, struct device *, void *); |
| 236 | |
| 237 | #define CDEV_MAJOR 61 |
| 238 | |
| 239 | static struct cfdriver i4brbchcd = |
| 240 | { NULL, "i4brbch", i4brbchmatch, dummy_i4brbchattach, DV_DULL, |
| 241 | sizeof(struct cfdriver) }; |
| 242 | struct devsw i4brbchsw = |
| 243 | { &i4brbchcd, |
| 244 | i4brbchopen, i4brbchclose, i4brbchread, i4brbchwrite, |
| 245 | i4brbchioctl, seltrue, nommap, nostrat, |
| 246 | nodump, nopsize, 0, nostop |
| 247 | }; |
| 248 | |
| 249 | int |
| 250 | i4brbchmatch(struct device *parent, struct cfdata *cf, void *aux) |
| 251 | { |
| 252 | printf("i4brbchmatch: aux=0x%x\n", aux); |
| 253 | return 1; |
| 254 | } |
| 255 | void |
| 256 | dummy_i4brbchattach(struct device *parent, struct device *self, void *aux) |
| 257 | { |
| 258 | printf("dummy_i4brbchattach: aux=0x%x\n", aux); |
| 259 | } |
| 260 | #endif /* __bsdi__ */ |
| 261 | |
| 262 | /*---------------------------------------------------------------------------* |
| 263 | * interface attach routine |
| 264 | *---------------------------------------------------------------------------*/ |
| 265 | PDEVSTATIC void |
| 266 | #ifdef __FreeBSD__ |
| 267 | i4brbchattach(void *dummy) |
| 268 | #else |
| 269 | i4brbchattach() |
| 270 | #endif |
| 271 | { |
| 272 | int i; |
| 273 | |
| 274 | #ifndef HACK_NO_PSEUDO_ATTACH_MSG |
| 275 | printf("i4brbch: %d raw B channel access device(s) attached\n", NI4BRBCH); |
| 276 | #endif |
| 277 | |
| 278 | for(i=0; i < NI4BRBCH; i++) |
| 279 | { |
| 280 | #if defined(__FreeBSD__) |
| 281 | make_dev(&i4brbch_cdevsw, i, |
| 282 | UID_ROOT, GID_WHEEL, 0600, "i4brbch%d", i); |
| 283 | #endif |
| 284 | |
| 285 | #if I4BRBCHACCT |
| 286 | #if defined(__FreeBSD__) |
| 287 | callout_handle_init(&rbch_softc[i].sc_callout); |
| 288 | #endif |
| 289 | #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 |
| 290 | callout_init(&rbch_softc[i].sc_callout); |
| 291 | #endif |
| 292 | rbch_softc[i].sc_fn = 1; |
| 293 | #endif |
| 294 | rbch_softc[i].sc_unit = i; |
| 295 | rbch_softc[i].sc_devstate = ST_IDLE; |
| 296 | rbch_softc[i].sc_hdlcq.ifq_maxlen = I4BRBCHMAXQLEN; |
| 297 | #if defined(__FreeBSD__) && __FreeBSD__ > 4 |
| 298 | mtx_init(&rbch_softc[i].sc_hdlcq.ifq_mtx, "i4b_rbch", MTX_DEF); |
| 299 | #endif |
| 300 | rbch_softc[i].it_in.c_ispeed = rbch_softc[i].it_in.c_ospeed = 64000; |
| 301 | termioschars(&rbch_softc[i].it_in); |
| 302 | rbch_init_linktab(i); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /*---------------------------------------------------------------------------* |
| 307 | * open rbch device |
| 308 | *---------------------------------------------------------------------------*/ |
| 309 | PDEVSTATIC int |
| 310 | i4brbchopen(dev_t dev, int flag, int fmt, struct thread *td) |
| 311 | { |
| 312 | int unit = minor(dev); |
| 313 | |
| 314 | if(unit >= NI4BRBCH) |
| 315 | return(ENXIO); |
| 316 | |
| 317 | if(rbch_softc[unit].sc_devstate & ST_ISOPEN) |
| 318 | return(EBUSY); |
| 319 | |
| 320 | #if 0 |
| 321 | rbch_clrq(unit); |
| 322 | #endif |
| 323 | |
| 324 | rbch_softc[unit].sc_devstate |= ST_ISOPEN; |
| 325 | |
| 326 | NDBGL4(L4_RBCHDBG, "unit %d, open", unit); |
| 327 | |
| 328 | return(0); |
| 329 | } |
| 330 | |
| 331 | /*---------------------------------------------------------------------------* |
| 332 | * close rbch device |
| 333 | *---------------------------------------------------------------------------*/ |
| 334 | PDEVSTATIC int |
| 335 | i4brbchclose(dev_t dev, int flag, int fmt, struct thread *td) |
| 336 | { |
| 337 | int unit = minor(dev); |
| 338 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 339 | |
| 340 | if(sc->sc_devstate & ST_CONNECTED) |
| 341 | i4b_l4_drvrdisc(BDRV_RBCH, unit); |
| 342 | |
| 343 | sc->sc_devstate &= ~ST_ISOPEN; |
| 344 | |
| 345 | rbch_clrq(unit); |
| 346 | |
| 347 | NDBGL4(L4_RBCHDBG, "unit %d, closed", unit); |
| 348 | |
| 349 | return(0); |
| 350 | } |
| 351 | |
| 352 | /*---------------------------------------------------------------------------* |
| 353 | * read from rbch device |
| 354 | *---------------------------------------------------------------------------*/ |
| 355 | PDEVSTATIC int |
| 356 | i4brbchread(dev_t dev, struct uio *uio, int ioflag) |
| 357 | { |
| 358 | struct mbuf *m; |
| 359 | int error = 0; |
| 360 | int unit = minor(dev); |
| 361 | struct ifqueue *iqp; |
| 362 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 363 | |
| 364 | CRIT_VAR; |
| 365 | |
| 366 | NDBGL4(L4_RBCHDBG, "unit %d, enter read", unit); |
| 367 | |
| 368 | CRIT_BEG; |
| 369 | if(!(sc->sc_devstate & ST_ISOPEN)) |
| 370 | { |
| 371 | CRIT_END; |
| 372 | NDBGL4(L4_RBCHDBG, "unit %d, read while not open", unit); |
| 373 | return(EIO); |
| 374 | } |
| 375 | |
| 376 | if((sc->sc_devstate & ST_NOBLOCK)) |
| 377 | { |
| 378 | if(!(sc->sc_devstate & ST_CONNECTED)) { |
| 379 | CRIT_END; |
| 380 | return(EWOULDBLOCK); |
| 381 | } |
| 382 | |
| 383 | if(sc->sc_bprot == BPROT_RHDLC) |
| 384 | iqp = &sc->sc_hdlcq; |
| 385 | else |
| 386 | iqp = isdn_linktab[unit]->rx_queue; |
| 387 | |
| 388 | if(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN)) { |
| 389 | CRIT_END; |
| 390 | return(EWOULDBLOCK); |
| 391 | } |
| 392 | } |
| 393 | else |
| 394 | { |
| 395 | while(!(sc->sc_devstate & ST_CONNECTED)) |
| 396 | { |
| 397 | NDBGL4(L4_RBCHDBG, "unit %d, wait read init", unit); |
| 398 | |
| 399 | if((error = tsleep((caddr_t) &rbch_softc[unit], |
| 400 | PCATCH, "rrrbch", 0 )) != 0) |
| 401 | { |
| 402 | CRIT_END; |
| 403 | NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep", unit, error); |
| 404 | return(error); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | if(sc->sc_bprot == BPROT_RHDLC) |
| 409 | iqp = &sc->sc_hdlcq; |
| 410 | else |
| 411 | iqp = isdn_linktab[unit]->rx_queue; |
| 412 | |
| 413 | while(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN)) |
| 414 | { |
| 415 | sc->sc_devstate |= ST_RDWAITDATA; |
| 416 | |
| 417 | NDBGL4(L4_RBCHDBG, "unit %d, wait read data", unit); |
| 418 | |
| 419 | if((error = tsleep((caddr_t) &isdn_linktab[unit]->rx_queue, |
| 420 | PCATCH, "rrbch", 0 )) != 0) |
| 421 | { |
| 422 | CRIT_END; |
| 423 | NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep read", unit, error); |
| 424 | sc->sc_devstate &= ~ST_RDWAITDATA; |
| 425 | return(error); |
| 426 | } |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | IF_DEQUEUE(iqp, m); |
| 431 | |
| 432 | NDBGL4(L4_RBCHDBG, "unit %d, read %d bytes", unit, m->m_len); |
| 433 | |
| 434 | if(m && m->m_len) |
| 435 | { |
| 436 | error = uiomove(m->m_data, m->m_len, uio); |
| 437 | } |
| 438 | else |
| 439 | { |
| 440 | NDBGL4(L4_RBCHDBG, "unit %d, error %d uiomove", unit, error); |
| 441 | error = EIO; |
| 442 | } |
| 443 | |
| 444 | if(m) |
| 445 | i4b_Bfreembuf(m); |
| 446 | |
| 447 | CRIT_END; |
| 448 | |
| 449 | return(error); |
| 450 | } |
| 451 | |
| 452 | /*---------------------------------------------------------------------------* |
| 453 | * write to rbch device |
| 454 | *---------------------------------------------------------------------------*/ |
| 455 | PDEVSTATIC int |
| 456 | i4brbchwrite(dev_t dev, struct uio * uio, int ioflag) |
| 457 | { |
| 458 | struct mbuf *m; |
| 459 | int error = 0; |
| 460 | int unit = minor(dev); |
| 461 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 462 | |
| 463 | CRIT_VAR; |
| 464 | |
| 465 | NDBGL4(L4_RBCHDBG, "unit %d, write", unit); |
| 466 | |
| 467 | CRIT_BEG; |
| 468 | if(!(sc->sc_devstate & ST_ISOPEN)) |
| 469 | { |
| 470 | NDBGL4(L4_RBCHDBG, "unit %d, write while not open", unit); |
| 471 | CRIT_END; |
| 472 | return(EIO); |
| 473 | } |
| 474 | |
| 475 | if((sc->sc_devstate & ST_NOBLOCK)) |
| 476 | { |
| 477 | if(!(sc->sc_devstate & ST_CONNECTED)) { |
| 478 | CRIT_END; |
| 479 | return(EWOULDBLOCK); |
| 480 | } |
| 481 | if(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN)) { |
| 482 | CRIT_END; |
| 483 | return(EWOULDBLOCK); |
| 484 | } |
| 485 | } |
| 486 | else |
| 487 | { |
| 488 | while(!(sc->sc_devstate & ST_CONNECTED)) |
| 489 | { |
| 490 | NDBGL4(L4_RBCHDBG, "unit %d, write wait init", unit); |
| 491 | |
| 492 | error = tsleep((caddr_t) &rbch_softc[unit], |
| 493 | PCATCH, "wrrbch", 0 ); |
| 494 | if(error == ERESTART) { |
| 495 | CRIT_END; |
| 496 | return (ERESTART); |
| 497 | } |
| 498 | else if(error == EINTR) |
| 499 | { |
| 500 | CRIT_END; |
| 501 | NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait init", unit); |
| 502 | return(EINTR); |
| 503 | } |
| 504 | else if(error) |
| 505 | { |
| 506 | CRIT_END; |
| 507 | NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep init", unit, error); |
| 508 | return(error); |
| 509 | } |
| 510 | tsleep((caddr_t) &rbch_softc[unit], PCATCH, "xrbch", (hz*1)); |
| 511 | } |
| 512 | |
| 513 | while(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN)) |
| 514 | { |
| 515 | sc->sc_devstate |= ST_WRWAITEMPTY; |
| 516 | |
| 517 | NDBGL4(L4_RBCHDBG, "unit %d, write queue full", unit); |
| 518 | |
| 519 | if ((error = tsleep((caddr_t) &isdn_linktab[unit]->tx_queue, |
| 520 | PCATCH, "wrbch", 0)) != 0) { |
| 521 | sc->sc_devstate &= ~ST_WRWAITEMPTY; |
| 522 | if(error == ERESTART) |
| 523 | { |
| 524 | CRIT_END; |
| 525 | return(ERESTART); |
| 526 | } |
| 527 | else if(error == EINTR) |
| 528 | { |
| 529 | CRIT_END; |
| 530 | NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait write", unit); |
| 531 | return(error); |
| 532 | } |
| 533 | else if(error) |
| 534 | { |
| 535 | CRIT_END; |
| 536 | NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep write", unit, error); |
| 537 | return(error); |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | if(!(sc->sc_devstate & ST_ISOPEN)) |
| 544 | { |
| 545 | NDBGL4(L4_RBCHDBG, "unit %d, not open anymore", unit); |
| 546 | CRIT_END; |
| 547 | return(EIO); |
| 548 | } |
| 549 | |
| 550 | if((m = i4b_Bgetmbuf(BCH_MAX_DATALEN)) != NULL) |
| 551 | { |
| 552 | m->m_len = min(BCH_MAX_DATALEN, uio->uio_resid); |
| 553 | |
| 554 | NDBGL4(L4_RBCHDBG, "unit %d, write %d bytes", unit, m->m_len); |
| 555 | |
| 556 | error = uiomove(m->m_data, m->m_len, uio); |
| 557 | |
| 558 | #if defined (__FreeBSD__) && __FreeBSD__ > 4 |
| 559 | (void) IF_HANDOFF(isdn_linktab[unit]->tx_queue, m, NULL); |
| 560 | #else |
| 561 | if(IF_QFULL(isdn_linktab[unit]->tx_queue)) |
| 562 | m_freem(m); |
| 563 | else |
| 564 | IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m); |
| 565 | #endif |
| 566 | (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel); |
| 567 | } |
| 568 | |
| 569 | CRIT_END; |
| 570 | |
| 571 | return(error); |
| 572 | } |
| 573 | |
| 574 | /*---------------------------------------------------------------------------* |
| 575 | * rbch device ioctl handlibg |
| 576 | *---------------------------------------------------------------------------*/ |
| 577 | PDEVSTATIC int |
| 578 | i4brbchioctl(dev_t dev, IOCTL_CMD_T cmd, caddr_t data, int flag, struct thread *td) |
| 579 | { |
| 580 | int error = 0; |
| 581 | int unit = minor(dev); |
| 582 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 583 | |
| 584 | switch(cmd) |
| 585 | { |
| 586 | case FIOASYNC: /* Set async mode */ |
| 587 | if (*(int *)data) |
| 588 | { |
| 589 | NDBGL4(L4_RBCHDBG, "unit %d, setting async mode", unit); |
| 590 | } |
| 591 | else |
| 592 | { |
| 593 | NDBGL4(L4_RBCHDBG, "unit %d, clearing async mode", unit); |
| 594 | } |
| 595 | break; |
| 596 | |
| 597 | case FIONBIO: |
| 598 | if (*(int *)data) |
| 599 | { |
| 600 | NDBGL4(L4_RBCHDBG, "unit %d, setting non-blocking mode", unit); |
| 601 | sc->sc_devstate |= ST_NOBLOCK; |
| 602 | } |
| 603 | else |
| 604 | { |
| 605 | NDBGL4(L4_RBCHDBG, "unit %d, clearing non-blocking mode", unit); |
| 606 | sc->sc_devstate &= ~ST_NOBLOCK; |
| 607 | } |
| 608 | break; |
| 609 | |
| 610 | case TIOCCDTR: /* Clear DTR */ |
| 611 | if(sc->sc_devstate & ST_CONNECTED) |
| 612 | { |
| 613 | NDBGL4(L4_RBCHDBG, "unit %d, disconnecting for DTR down", unit); |
| 614 | i4b_l4_drvrdisc(BDRV_RBCH, unit); |
| 615 | } |
| 616 | break; |
| 617 | |
| 618 | case I4B_RBCH_DIALOUT: |
| 619 | { |
| 620 | size_t l; |
| 621 | |
| 622 | for (l = 0; l < TELNO_MAX && ((char *)data)[l]; l++) |
| 623 | ; |
| 624 | if (l) |
| 625 | { |
| 626 | NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout to %s", unit, (char *)data); |
| 627 | i4b_l4_dialoutnumber(BDRV_RBCH, unit, l, (char *)data); |
| 628 | break; |
| 629 | } |
| 630 | /* fall through to SDTR */ |
| 631 | } |
| 632 | |
| 633 | case TIOCSDTR: /* Set DTR */ |
| 634 | NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout (DTR)", unit); |
| 635 | i4b_l4_dialout(BDRV_RBCH, unit); |
| 636 | break; |
| 637 | |
| 638 | case TIOCSETA: /* Set termios struct */ |
| 639 | break; |
| 640 | |
| 641 | case TIOCGETA: /* Get termios struct */ |
| 642 | *(struct termios *)data = sc->it_in; |
| 643 | break; |
| 644 | |
| 645 | case TIOCMGET: |
| 646 | *(int *)data = TIOCM_LE|TIOCM_DTR|TIOCM_RTS|TIOCM_CTS|TIOCM_DSR; |
| 647 | if (sc->sc_devstate & ST_CONNECTED) |
| 648 | *(int *)data |= TIOCM_CD; |
| 649 | break; |
| 650 | |
| 651 | case I4B_RBCH_VR_REQ: |
| 652 | { |
| 653 | msg_vr_req_t *mvr; |
| 654 | |
| 655 | mvr = (msg_vr_req_t *)data; |
| 656 | |
| 657 | mvr->version = VERSION; |
| 658 | mvr->release = REL; |
| 659 | mvr->step = STEP; |
| 660 | break; |
| 661 | } |
| 662 | |
| 663 | default: /* Unknown stuff */ |
| 664 | NDBGL4(L4_RBCHDBG, "unit %d, ioctl, unknown cmd %lx", unit, (u_long)cmd); |
| 665 | error = EINVAL; |
| 666 | break; |
| 667 | } |
| 668 | return(error); |
| 669 | } |
| 670 | |
| 671 | #ifdef OS_USES_POLL |
| 672 | |
| 673 | /*---------------------------------------------------------------------------* |
| 674 | * device driver poll |
| 675 | *---------------------------------------------------------------------------*/ |
| 676 | PDEVSTATIC int |
| 677 | i4brbchpoll(dev_t dev, int events, struct thread *td) |
| 678 | { |
| 679 | int revents = 0; /* Events we found */ |
| 680 | int s; |
| 681 | int unit = minor(dev); |
| 682 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 683 | |
| 684 | /* We can't check for anything but IN or OUT */ |
| 685 | |
| 686 | s = splhigh(); |
| 687 | |
| 688 | if(!(sc->sc_devstate & ST_ISOPEN)) |
| 689 | { |
| 690 | splx(s); |
| 691 | return(POLLNVAL); |
| 692 | } |
| 693 | |
| 694 | /* |
| 695 | * Writes are OK if we are connected and the |
| 696 | * transmit queue can take them |
| 697 | */ |
| 698 | |
| 699 | if((events & (POLLOUT|POLLWRNORM)) && |
| 700 | (sc->sc_devstate & ST_CONNECTED) && |
| 701 | !_IF_QFULL(isdn_linktab[unit]->tx_queue)) |
| 702 | { |
| 703 | revents |= (events & (POLLOUT|POLLWRNORM)); |
| 704 | } |
| 705 | |
| 706 | /* ... while reads are OK if we have any data */ |
| 707 | |
| 708 | if((events & (POLLIN|POLLRDNORM)) && |
| 709 | (sc->sc_devstate & ST_CONNECTED)) |
| 710 | { |
| 711 | struct ifqueue *iqp; |
| 712 | |
| 713 | if(sc->sc_bprot == BPROT_RHDLC) |
| 714 | iqp = &sc->sc_hdlcq; |
| 715 | else |
| 716 | iqp = isdn_linktab[unit]->rx_queue; |
| 717 | |
| 718 | if(!IF_QEMPTY(iqp)) |
| 719 | revents |= (events & (POLLIN|POLLRDNORM)); |
| 720 | } |
| 721 | |
| 722 | if(revents == 0) |
| 723 | selrecord(td, &sc->selp); |
| 724 | |
| 725 | splx(s); |
| 726 | return(revents); |
| 727 | } |
| 728 | |
| 729 | #else /* OS_USES_POLL */ |
| 730 | |
| 731 | /*---------------------------------------------------------------------------* |
| 732 | * device driver select |
| 733 | *---------------------------------------------------------------------------*/ |
| 734 | PDEVSTATIC int |
| 735 | i4brbchselect(dev_t dev, int rw, struct thread *td) |
| 736 | { |
| 737 | int unit = minor(dev); |
| 738 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 739 | int s; |
| 740 | |
| 741 | s = splhigh(); |
| 742 | |
| 743 | if(!(sc->sc_devstate & ST_ISOPEN)) |
| 744 | { |
| 745 | splx(s); |
| 746 | NDBGL4(L4_RBCHDBG, "unit %d, not open anymore", unit); |
| 747 | return(1); |
| 748 | } |
| 749 | |
| 750 | if(sc->sc_devstate & ST_CONNECTED) |
| 751 | { |
| 752 | struct ifqueue *iqp; |
| 753 | |
| 754 | switch(rw) |
| 755 | { |
| 756 | case FREAD: |
| 757 | if(sc->sc_bprot == BPROT_RHDLC) |
| 758 | iqp = &sc->sc_hdlcq; |
| 759 | else |
| 760 | iqp = isdn_linktab[unit]->rx_queue; |
| 761 | |
| 762 | if(!IF_QEMPTY(iqp)) |
| 763 | { |
| 764 | splx(s); |
| 765 | return(1); |
| 766 | } |
| 767 | break; |
| 768 | |
| 769 | case FWRITE: |
| 770 | if(!_IF_QFULL(isdn_linktab[unit]->rx_queue)) |
| 771 | { |
| 772 | splx(s); |
| 773 | return(1); |
| 774 | } |
| 775 | break; |
| 776 | |
| 777 | default: |
| 778 | splx(s); |
| 779 | return 0; |
| 780 | } |
| 781 | } |
| 782 | selrecord(p, &sc->selp); |
| 783 | splx(s); |
| 784 | return(0); |
| 785 | } |
| 786 | |
| 787 | #endif /* OS_USES_POLL */ |
| 788 | |
| 789 | #if I4BRBCHACCT |
| 790 | /*---------------------------------------------------------------------------* |
| 791 | * watchdog routine |
| 792 | *---------------------------------------------------------------------------*/ |
| 793 | static void |
| 794 | rbch_timeout(struct rbch_softc *sc) |
| 795 | { |
| 796 | bchan_statistics_t bs; |
| 797 | int unit = sc->sc_unit; |
| 798 | |
| 799 | /* get # of bytes in and out from the HSCX driver */ |
| 800 | |
| 801 | (*isdn_linktab[unit]->bch_stat) |
| 802 | (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs); |
| 803 | |
| 804 | sc->sc_ioutb += bs.outbytes; |
| 805 | sc->sc_iinb += bs.inbytes; |
| 806 | |
| 807 | if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn) |
| 808 | { |
| 809 | int ri = (sc->sc_iinb - sc->sc_linb)/I4BRBCHACCTINTVL; |
| 810 | int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BRBCHACCTINTVL; |
| 811 | |
| 812 | if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb)) |
| 813 | sc->sc_fn = 0; |
| 814 | else |
| 815 | sc->sc_fn = 1; |
| 816 | |
| 817 | sc->sc_linb = sc->sc_iinb; |
| 818 | sc->sc_loutb = sc->sc_ioutb; |
| 819 | |
| 820 | i4b_l4_accounting(BDRV_RBCH, unit, ACCT_DURING, |
| 821 | sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb); |
| 822 | } |
| 823 | START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz); |
| 824 | } |
| 825 | #endif /* I4BRBCHACCT */ |
| 826 | |
| 827 | /*===========================================================================* |
| 828 | * ISDN INTERFACE ROUTINES |
| 829 | *===========================================================================*/ |
| 830 | |
| 831 | /*---------------------------------------------------------------------------* |
| 832 | * this routine is called from L4 handler at connect time |
| 833 | *---------------------------------------------------------------------------*/ |
| 834 | static void |
| 835 | rbch_connect(int unit, void *cdp) |
| 836 | { |
| 837 | call_desc_t *cd = (call_desc_t *)cdp; |
| 838 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 839 | |
| 840 | sc->sc_bprot = cd->bprot; |
| 841 | |
| 842 | #if I4BRBCHACCT |
| 843 | if(sc->sc_bprot == BPROT_RHDLC) |
| 844 | { |
| 845 | sc->sc_iinb = 0; |
| 846 | sc->sc_ioutb = 0; |
| 847 | sc->sc_linb = 0; |
| 848 | sc->sc_loutb = 0; |
| 849 | |
| 850 | START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz); |
| 851 | } |
| 852 | #endif |
| 853 | if(!(sc->sc_devstate & ST_CONNECTED)) |
| 854 | { |
| 855 | NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit); |
| 856 | sc->sc_devstate |= ST_CONNECTED; |
| 857 | sc->sc_cd = cdp; |
| 858 | wakeup((caddr_t)sc); |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | /*---------------------------------------------------------------------------* |
| 863 | * this routine is called from L4 handler at disconnect time |
| 864 | *---------------------------------------------------------------------------*/ |
| 865 | static void |
| 866 | rbch_disconnect(int unit, void *cdp) |
| 867 | { |
| 868 | call_desc_t *cd = (call_desc_t *)cdp; |
| 869 | struct rbch_softc *sc = &rbch_softc[unit]; |
| 870 | |
| 871 | CRIT_VAR; |
| 872 | |
| 873 | if(cd != sc->sc_cd) |
| 874 | { |
| 875 | NDBGL4(L4_RBCHDBG, "rbch%d: channel %d not active", |
| 876 | cd->driver_unit, cd->channelid); |
| 877 | return; |
| 878 | } |
| 879 | |
| 880 | CRIT_BEG; |
| 881 | |
| 882 | NDBGL4(L4_RBCHDBG, "unit %d, disconnect", unit); |
| 883 | |
| 884 | sc->sc_devstate &= ~ST_CONNECTED; |
| 885 | |
| 886 | sc->sc_cd = NULL; |
| 887 | |
| 888 | #if I4BRBCHACCT |
| 889 | i4b_l4_accounting(BDRV_RBCH, unit, ACCT_FINAL, |
| 890 | sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_ioutb, sc->sc_iinb); |
| 891 | |
| 892 | STOP_TIMER(sc->sc_callout, rbch_timeout, sc); |
| 893 | #endif |
| 894 | CRIT_END; |
| 895 | } |
| 896 | |
| 897 | /*---------------------------------------------------------------------------* |
| 898 | * feedback from daemon in case of dial problems |
| 899 | *---------------------------------------------------------------------------*/ |
| 900 | static void |
| 901 | rbch_dialresponse(int unit, int status, cause_t cause) |
| 902 | { |
| 903 | } |
| 904 | |
| 905 | /*---------------------------------------------------------------------------* |
| 906 | * interface up/down |
| 907 | *---------------------------------------------------------------------------*/ |
| 908 | static void |
| 909 | rbch_updown(int unit, int updown) |
| 910 | { |
| 911 | } |
| 912 | |
| 913 | /*---------------------------------------------------------------------------* |
| 914 | * this routine is called from the HSCX interrupt handler |
| 915 | * when a new frame (mbuf) has been received and is to be put on |
| 916 | * the rx queue. |
| 917 | *---------------------------------------------------------------------------*/ |
| 918 | static void |
| 919 | rbch_rx_data_rdy(int unit) |
| 920 | { |
| 921 | if(rbch_softc[unit].sc_bprot == BPROT_RHDLC) |
| 922 | { |
| 923 | register struct mbuf *m; |
| 924 | |
| 925 | if((m = *isdn_linktab[unit]->rx_mbuf) == NULL) |
| 926 | return; |
| 927 | |
| 928 | m->m_pkthdr.len = m->m_len; |
| 929 | |
| 930 | #if defined (__FreeBSD__) && __FreeBSD__ > 4 |
| 931 | if (! IF_HANDOFF(&(rbch_softc[unit].sc_hdlcq), m, NULL)) |
| 932 | { |
| 933 | NDBGL4(L4_RBCHDBG, "unit %d: hdlc rx queue full!", unit); |
| 934 | } |
| 935 | #else |
| 936 | if(IF_QFULL(&(rbch_softc[unit].sc_hdlcq))) |
| 937 | { |
| 938 | NDBGL4(L4_RBCHDBG, "unit %d: hdlc rx queue full!", unit); |
| 939 | m_freem(m); |
| 940 | } |
| 941 | else |
| 942 | { |
| 943 | IF_ENQUEUE(&(rbch_softc[unit].sc_hdlcq), m); |
| 944 | } |
| 945 | #endif |
| 946 | } |
| 947 | |
| 948 | if(rbch_softc[unit].sc_devstate & ST_RDWAITDATA) |
| 949 | { |
| 950 | NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit); |
| 951 | rbch_softc[unit].sc_devstate &= ~ST_RDWAITDATA; |
| 952 | wakeup((caddr_t) &isdn_linktab[unit]->rx_queue); |
| 953 | } |
| 954 | else |
| 955 | { |
| 956 | NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit); |
| 957 | } |
| 958 | selwakeup(&rbch_softc[unit].selp); |
| 959 | } |
| 960 | |
| 961 | /*---------------------------------------------------------------------------* |
| 962 | * this routine is called from the HSCX interrupt handler |
| 963 | * when the last frame has been sent out and there is no |
| 964 | * further frame (mbuf) in the tx queue. |
| 965 | *---------------------------------------------------------------------------*/ |
| 966 | static void |
| 967 | rbch_tx_queue_empty(int unit) |
| 968 | { |
| 969 | if(rbch_softc[unit].sc_devstate & ST_WRWAITEMPTY) |
| 970 | { |
| 971 | NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit); |
| 972 | rbch_softc[unit].sc_devstate &= ~ST_WRWAITEMPTY; |
| 973 | wakeup((caddr_t) &isdn_linktab[unit]->tx_queue); |
| 974 | } |
| 975 | else |
| 976 | { |
| 977 | NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit); |
| 978 | } |
| 979 | selwakeup(&rbch_softc[unit].selp); |
| 980 | } |
| 981 | |
| 982 | /*---------------------------------------------------------------------------* |
| 983 | * this routine is called from the HSCX interrupt handler |
| 984 | * each time a packet is received or transmitted |
| 985 | *---------------------------------------------------------------------------*/ |
| 986 | static void |
| 987 | rbch_activity(int unit, int rxtx) |
| 988 | { |
| 989 | if (rbch_softc[unit].sc_cd) |
| 990 | rbch_softc[unit].sc_cd->last_active_time = SECOND; |
| 991 | selwakeup(&rbch_softc[unit].selp); |
| 992 | } |
| 993 | |
| 994 | /*---------------------------------------------------------------------------* |
| 995 | * clear an hdlc rx queue for a rbch unit |
| 996 | *---------------------------------------------------------------------------*/ |
| 997 | static void |
| 998 | rbch_clrq(int unit) |
| 999 | { |
| 1000 | CRIT_VAR; |
| 1001 | |
| 1002 | #if defined (__FreeBSD__) && __FreeBSD__ > 4 |
| 1003 | CRIT_BEG; |
| 1004 | IF_DRAIN(&rbch_softc[unit].sc_hdlcq); |
| 1005 | CRIT_END; |
| 1006 | #else |
| 1007 | struct mbuf *m; |
| 1008 | for(;;) |
| 1009 | { |
| 1010 | CRIT_BEG; |
| 1011 | IF_DEQUEUE(&rbch_softc[unit].sc_hdlcq, m); |
| 1012 | CRIT_END; |
| 1013 | |
| 1014 | if(m) |
| 1015 | m_freem(m); |
| 1016 | else |
| 1017 | break; |
| 1018 | } |
| 1019 | #endif |
| 1020 | } |
| 1021 | |
| 1022 | /*---------------------------------------------------------------------------* |
| 1023 | * return this drivers linktab address |
| 1024 | *---------------------------------------------------------------------------*/ |
| 1025 | drvr_link_t * |
| 1026 | rbch_ret_linktab(int unit) |
| 1027 | { |
| 1028 | rbch_init_linktab(unit); |
| 1029 | return(&rbch_drvr_linktab[unit]); |
| 1030 | } |
| 1031 | |
| 1032 | /*---------------------------------------------------------------------------* |
| 1033 | * setup the isdn_linktab for this driver |
| 1034 | *---------------------------------------------------------------------------*/ |
| 1035 | void |
| 1036 | rbch_set_linktab(int unit, isdn_link_t *ilt) |
| 1037 | { |
| 1038 | isdn_linktab[unit] = ilt; |
| 1039 | } |
| 1040 | |
| 1041 | /*---------------------------------------------------------------------------* |
| 1042 | * initialize this drivers linktab |
| 1043 | *---------------------------------------------------------------------------*/ |
| 1044 | static void |
| 1045 | rbch_init_linktab(int unit) |
| 1046 | { |
| 1047 | rbch_drvr_linktab[unit].unit = unit; |
| 1048 | rbch_drvr_linktab[unit].bch_rx_data_ready = rbch_rx_data_rdy; |
| 1049 | rbch_drvr_linktab[unit].bch_tx_queue_empty = rbch_tx_queue_empty; |
| 1050 | rbch_drvr_linktab[unit].bch_activity = rbch_activity; |
| 1051 | rbch_drvr_linktab[unit].line_connected = rbch_connect; |
| 1052 | rbch_drvr_linktab[unit].line_disconnected = rbch_disconnect; |
| 1053 | rbch_drvr_linktab[unit].dial_response = rbch_dialresponse; |
| 1054 | rbch_drvr_linktab[unit].updown_ind = rbch_updown; |
| 1055 | } |
| 1056 | |
| 1057 | /*===========================================================================*/ |
| 1058 | |
| 1059 | #endif /* NI4BRBCH > 0 */ |