1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/file.h> 31 #include <sys/errno.h> 32 #include <sys/uio.h> 33 #include <sys/open.h> 34 #include <sys/cred.h> 35 #include <sys/kmem.h> 36 #include <sys/conf.h> 37 #include <sys/cmn_err.h> 38 #include <sys/ksynch.h> 39 #include <sys/modctl.h> 40 #include <sys/stat.h> /* needed for S_IFBLK and S_IFCHR */ 41 #include <sys/debug.h> 42 #include <sys/sysmacros.h> 43 #include <sys/types.h> 44 #include <sys/cred.h> 45 #include <sys/promif.h> 46 #include <sys/ddi.h> 47 #include <sys/sunddi.h> 48 #include <sys/cyclic.h> 49 #include <sys/note.h> 50 #include <sys/mach_descrip.h> 51 #include <sys/mdeg.h> 52 #include <sys/ldc.h> 53 #include <sys/vldc_impl.h> 54 55 /* 56 * Function prototypes. 57 */ 58 59 /* DDI entrypoints */ 60 static int vldc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); 61 static int vldc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); 62 static int vldc_open(dev_t *devp, int flag, int otyp, cred_t *cred); 63 static int vldc_close(dev_t dev, int flag, int otyp, cred_t *cred); 64 static int vldc_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, 65 cred_t *credp, int *rvalp); 66 static int vldc_read(dev_t dev, struct uio *uiop, cred_t *credp); 67 static int vldc_write(dev_t dev, struct uio *uiop, cred_t *credp); 68 static int vldc_chpoll(dev_t dev, short events, int anyyet, 69 short *reventsp, struct pollhead **phpp); 70 71 /* Internal functions */ 72 static uint_t i_vldc_cb(uint64_t event, caddr_t arg); 73 static int i_vldc_mdeg_cb(void *cb_argp, mdeg_result_t *resp); 74 static int i_vldc_mdeg_register(vldc_t *vldcp); 75 static int i_vldc_mdeg_unregister(vldc_t *vldcp); 76 static int i_vldc_add_port(vldc_t *vldcp, md_t *mdp, mde_cookie_t node); 77 static int i_vldc_remove_port(vldc_t *vldcp, uint_t portno); 78 static int i_vldc_close_port(vldc_t *vldcp, uint_t portno); 79 80 /* soft state structure */ 81 static void *vldc_ssp; 82 83 /* 84 * Matching criteria passed to the MDEG to register interest 85 * in changes to 'virtual-device-port' nodes identified by their 86 * 'id' property. 87 */ 88 static md_prop_match_t vport_prop_match[] = { 89 { MDET_PROP_VAL, "id" }, 90 { MDET_LIST_END, NULL } 91 }; 92 93 static mdeg_node_match_t vport_match = { "virtual-device-port", 94 vport_prop_match }; 95 96 /* 97 * Specification of an MD node passed to the MDEG to filter any 98 * 'virtual-device-port' nodes that do not belong to the specified 99 * node. This template is copied for each vldc instance and filled 100 * in with the appropriate 'name' and 'cfg-handle' values before 101 * being passed to the MDEG. 102 */ 103 static mdeg_prop_spec_t vldc_prop_template[] = { 104 { MDET_PROP_STR, "name", NULL }, 105 { MDET_PROP_VAL, "cfg-handle", NULL }, 106 { MDET_LIST_END, NULL, NULL } 107 }; 108 109 #define VLDC_MDEG_PROP_NAME(specp) ((specp)[0].ps_str) 110 #define VLDC_SET_MDEG_PROP_NAME(specp, name) ((specp)[0].ps_str = (name)) 111 #define VLDC_SET_MDEG_PROP_INST(specp, inst) ((specp)[1].ps_val = (inst)) 112 113 114 static struct cb_ops vldc_cb_ops = { 115 vldc_open, /* open */ 116 vldc_close, /* close */ 117 nodev, /* strategy */ 118 nodev, /* print */ 119 nodev, /* dump */ 120 vldc_read, /* read */ 121 vldc_write, /* write */ 122 vldc_ioctl, /* ioctl */ 123 nodev, /* devmap */ 124 nodev, /* mmap */ 125 ddi_segmap, /* segmap */ 126 vldc_chpoll, /* chpoll */ 127 ddi_prop_op, /* prop_op */ 128 NULL, /* stream */ 129 D_NEW | D_MP /* flag */ 130 }; 131 132 static struct dev_ops vldc_ops = { 133 DEVO_REV, /* rev */ 134 0, /* ref count */ 135 ddi_getinfo_1to1, /* getinfo */ 136 nulldev, /* identify */ 137 nulldev, /* probe */ 138 vldc_attach, /* attach */ 139 vldc_detach, /* detach */ 140 nodev, /* reset */ 141 &vldc_cb_ops, /* cb_ops */ 142 (struct bus_ops *)NULL /* bus_ops */ 143 }; 144 145 extern struct mod_ops mod_driverops; 146 147 static struct modldrv md = { 148 &mod_driverops, /* Type - it is a driver */ 149 "sun4v Virtual LDC Driver %I%", /* Name of the module */ 150 &vldc_ops, /* driver specific ops */ 151 }; 152 153 static struct modlinkage ml = { 154 MODREV_1, 155 &md, 156 NULL 157 }; 158 159 /* maximum MTU and cookie size tunables */ 160 uint32_t vldc_max_mtu = VLDC_MAX_MTU; 161 uint64_t vldc_max_cookie = VLDC_MAX_COOKIE; 162 163 164 #ifdef DEBUG 165 166 /* 167 * Print debug messages 168 * 169 * set vldcdbg to 0x7 to enable all messages 170 * 171 * 0x4 - Warnings 172 * 0x2 - All debug messages (most verbose) 173 * 0x1 - Minimal debug messages 174 */ 175 176 int vldcdbg = 0x0; 177 178 static void 179 vldcdebug(const char *fmt, ...) 180 { 181 char buf[512]; 182 va_list ap; 183 184 va_start(ap, fmt); 185 (void) vsnprintf(buf, sizeof (buf), fmt, ap); 186 va_end(ap); 187 188 cmn_err(CE_CONT, "?%s", buf); 189 } 190 191 #define D1 if (vldcdbg & 0x01) vldcdebug 192 #define D2 if (vldcdbg & 0x02) vldcdebug 193 #define DWARN if (vldcdbg & 0x04) vldcdebug 194 195 #else /* not DEBUG */ 196 197 #define D1 if (0) printf 198 #define D2 if (0) printf 199 #define DWARN if (0) printf 200 201 #endif /* not DEBUG */ 202 203 204 /* _init(9E): initialize the loadable module */ 205 int 206 _init(void) 207 { 208 int error; 209 210 /* init the soft state structure */ 211 error = ddi_soft_state_init(&vldc_ssp, sizeof (vldc_t), 1); 212 if (error != 0) { 213 return (error); 214 } 215 216 /* Link the driver into the system */ 217 error = mod_install(&ml); 218 219 return (error); 220 } 221 222 /* _info(9E): return information about the loadable module */ 223 int 224 _info(struct modinfo *modinfop) 225 { 226 /* Report status of the dynamically loadable driver module */ 227 return (mod_info(&ml, modinfop)); 228 } 229 230 /* _fini(9E): prepare the module for unloading. */ 231 int 232 _fini(void) 233 { 234 int error; 235 236 /* Unlink the driver module from the system */ 237 if ((error = mod_remove(&ml)) == 0) { 238 /* 239 * We have successfully "removed" the driver. 240 * destroy soft state 241 */ 242 ddi_soft_state_fini(&vldc_ssp); 243 } 244 245 return (error); 246 } 247 248 /* ldc callback */ 249 static uint_t 250 i_vldc_cb(uint64_t event, caddr_t arg) 251 { 252 vldc_port_t *vport = (vldc_port_t *)arg; 253 short pollevents = 0; 254 int rv; 255 256 D1("i_vldc_cb: callback invoked port=%d, event=0x%lx\n", 257 vport->number, event); 258 259 if (event & LDC_EVT_UP) { 260 pollevents |= POLLOUT; 261 vport->hanged_up = B_FALSE; 262 263 } else if (event & LDC_EVT_DOWN) { 264 pollevents |= POLLHUP; 265 vport->hanged_up = B_TRUE; 266 267 } else if (event & LDC_EVT_RESET) { 268 /* do an ldc_up because we can't be sure the other side will */ 269 if ((rv = ldc_up(vport->ldc_handle)) != 0) 270 if (rv != ECONNREFUSED) 271 DWARN("i_vldc_cb: port@%d failed to" 272 " bring up LDC channel=%ld, err=%d\n", 273 vport->number, vport->ldc_id, rv); 274 } 275 276 if (event & LDC_EVT_READ) 277 pollevents |= POLLIN; 278 279 if (pollevents != 0) { 280 D1("i_vldc_cb: port@%d pollwakeup=0x%x\n", 281 vport->number, pollevents); 282 pollwakeup(&vport->poll, pollevents); 283 } 284 285 return (LDC_SUCCESS); 286 } 287 288 /* mdeg callback */ 289 static int 290 i_vldc_mdeg_cb(void *cb_argp, mdeg_result_t *resp) 291 { 292 vldc_t *vldcp; 293 int idx; 294 uint64_t portno; 295 int rv; 296 md_t *mdp; 297 mde_cookie_t node; 298 299 if (resp == NULL) { 300 D1("i_vldc_mdeg_cb: no result returned\n"); 301 return (MDEG_FAILURE); 302 } 303 304 vldcp = (vldc_t *)cb_argp; 305 306 mutex_enter(&vldcp->lock); 307 if (vldcp->detaching == B_TRUE) { 308 D1("i_vldc_mdeg_cb: detach in progress\n"); 309 mutex_exit(&vldcp->lock); 310 return (MDEG_FAILURE); 311 } 312 313 D1("i_vldc_mdeg_cb: added=%d, removed=%d, matched=%d\n", 314 resp->added.nelem, resp->removed.nelem, resp->match_prev.nelem); 315 316 /* process added ports */ 317 for (idx = 0; idx < resp->added.nelem; idx++) { 318 mdp = resp->added.mdp; 319 node = resp->added.mdep[idx]; 320 321 D1("i_vldc_mdeg_cb: processing added node 0x%lx\n", node); 322 323 /* attempt to add a port */ 324 if ((rv = i_vldc_add_port(vldcp, mdp, node)) != MDEG_SUCCESS) { 325 cmn_err(CE_NOTE, "?i_vldc_mdeg_cb: unable to add port, " 326 "err = %d", rv); 327 } 328 } 329 330 /* process removed ports */ 331 for (idx = 0; idx < resp->removed.nelem; idx++) { 332 mdp = resp->removed.mdp; 333 node = resp->removed.mdep[idx]; 334 335 D1("i_vldc_mdeg_cb: processing removed node 0x%lx\n", node); 336 337 /* read in the port's id property */ 338 if (md_get_prop_val(mdp, node, "id", &portno)) { 339 cmn_err(CE_NOTE, "?i_vldc_mdeg_cb: node 0x%lx of " 340 "removed list has no 'id' property", node); 341 continue; 342 } 343 344 /* attempt to remove a port */ 345 if ((rv = i_vldc_remove_port(vldcp, portno)) != 0) { 346 cmn_err(CE_NOTE, "?i_vldc_mdeg_cb: unable to remove " 347 "port %lu, err %d", portno, rv); 348 } 349 } 350 351 /* 352 * Currently no support for updating already active ports. So, ignore 353 * the match_curr and match_prev arrays for now. 354 */ 355 356 mutex_exit(&vldcp->lock); 357 358 return (MDEG_SUCCESS); 359 } 360 361 /* register callback to mdeg */ 362 static int 363 i_vldc_mdeg_register(vldc_t *vldcp) 364 { 365 mdeg_prop_spec_t *pspecp; 366 mdeg_node_spec_t *inst_specp; 367 mdeg_handle_t mdeg_hdl; 368 size_t templatesz; 369 int inst; 370 char *name; 371 size_t namesz; 372 char *nameprop; 373 int rv; 374 375 /* get the unique vldc instance assigned by the LDom manager */ 376 inst = ddi_prop_get_int(DDI_DEV_T_ANY, vldcp->dip, 377 DDI_PROP_DONTPASS, "reg", -1); 378 if (inst == -1) { 379 cmn_err(CE_NOTE, "?vldc%d has no 'reg' property", 380 ddi_get_instance(vldcp->dip)); 381 return (DDI_FAILURE); 382 } 383 384 /* get the name of the vldc instance */ 385 rv = ddi_prop_lookup_string(DDI_DEV_T_ANY, vldcp->dip, 386 DDI_PROP_DONTPASS, "name", &nameprop); 387 if (rv != DDI_PROP_SUCCESS) { 388 cmn_err(CE_NOTE, "?vldc%d has no 'name' property", 389 ddi_get_instance(vldcp->dip)); 390 return (DDI_FAILURE); 391 } 392 393 D1("i_vldc_mdeg_register: name=%s, instance=%d\n", nameprop, inst); 394 395 /* 396 * Allocate and initialize a per-instance copy 397 * of the global property spec array that will 398 * uniquely identify this vldc instance. 399 */ 400 templatesz = sizeof (vldc_prop_template); 401 pspecp = kmem_alloc(templatesz, KM_SLEEP); 402 403 bcopy(vldc_prop_template, pspecp, templatesz); 404 405 /* copy in the name property */ 406 namesz = strlen(nameprop) + 1; 407 name = kmem_alloc(namesz, KM_SLEEP); 408 409 bcopy(nameprop, name, namesz); 410 VLDC_SET_MDEG_PROP_NAME(pspecp, name); 411 412 /* copy in the instance property */ 413 VLDC_SET_MDEG_PROP_INST(pspecp, inst); 414 415 /* initialize the complete prop spec structure */ 416 inst_specp = kmem_alloc(sizeof (mdeg_node_spec_t), KM_SLEEP); 417 inst_specp->namep = "virtual-device"; 418 inst_specp->specp = pspecp; 419 420 /* perform the registration */ 421 rv = mdeg_register(inst_specp, &vport_match, i_vldc_mdeg_cb, 422 vldcp, &mdeg_hdl); 423 424 if (rv != MDEG_SUCCESS) { 425 cmn_err(CE_NOTE, "?i_vldc_mdeg_register: mdeg_register " 426 "failed, err = %d", rv); 427 kmem_free(name, namesz); 428 kmem_free(pspecp, templatesz); 429 kmem_free(inst_specp, sizeof (mdeg_node_spec_t)); 430 return (DDI_FAILURE); 431 } 432 433 /* save off data that will be needed later */ 434 vldcp->inst_spec = inst_specp; 435 vldcp->mdeg_hdl = mdeg_hdl; 436 437 return (DDI_SUCCESS); 438 } 439 440 /* unregister callback from mdeg */ 441 static int 442 i_vldc_mdeg_unregister(vldc_t *vldcp) 443 { 444 char *name; 445 int rv; 446 447 D1("i_vldc_mdeg_unregister: hdl=0x%lx\n", vldcp->mdeg_hdl); 448 449 rv = mdeg_unregister(vldcp->mdeg_hdl); 450 if (rv != MDEG_SUCCESS) { 451 return (rv); 452 } 453 454 /* 455 * Clean up cached MDEG data 456 */ 457 name = VLDC_MDEG_PROP_NAME(vldcp->inst_spec->specp); 458 if (name != NULL) { 459 kmem_free(name, strlen(name) + 1); 460 } 461 kmem_free(vldcp->inst_spec->specp, sizeof (vldc_prop_template)); 462 vldcp->inst_spec->specp = NULL; 463 464 kmem_free(vldcp->inst_spec, sizeof (mdeg_node_spec_t)); 465 vldcp->inst_spec = NULL; 466 467 return (MDEG_SUCCESS); 468 } 469 470 static int 471 i_vldc_get_port_channel(md_t *mdp, mde_cookie_t node, uint64_t *ldc_id) 472 { 473 int num_nodes, nchan; 474 size_t listsz; 475 mde_cookie_t *listp; 476 477 /* 478 * Find the channel-endpoint node(s) (which should be under this 479 * port node) which contain the channel id(s). 480 */ 481 if ((num_nodes = md_node_count(mdp)) <= 0) { 482 cmn_err(CE_NOTE, "?i_vldc_get_port_channel: invalid number of " 483 "channel-endpoint nodes found (%d)", num_nodes); 484 return (-1); 485 } 486 487 /* allocate space for node list */ 488 listsz = num_nodes * sizeof (mde_cookie_t); 489 listp = kmem_alloc(listsz, KM_SLEEP); 490 491 nchan = md_scan_dag(mdp, node, md_find_name(mdp, "channel-endpoint"), 492 md_find_name(mdp, "fwd"), listp); 493 494 if (nchan <= 0) { 495 cmn_err(CE_NOTE, "?i_vldc_get_port_channel: no channel-endpoint" 496 " nodes found"); 497 kmem_free(listp, listsz); 498 return (-1); 499 } 500 501 D2("i_vldc_get_port_channel: %d channel-endpoint nodes found", nchan); 502 503 /* use property from first node found */ 504 if (md_get_prop_val(mdp, listp[0], "id", ldc_id)) { 505 cmn_err(CE_NOTE, "?i_vldc_get_port_channel: channel-endpoint " 506 "has no 'id' property"); 507 kmem_free(listp, listsz); 508 return (-1); 509 } 510 511 kmem_free(listp, listsz); 512 513 return (0); 514 } 515 516 /* add a vldc port */ 517 static int 518 i_vldc_add_port(vldc_t *vldcp, md_t *mdp, mde_cookie_t node) 519 { 520 vldc_port_t *vport; 521 char *sname; 522 uint64_t portno; 523 int vldc_inst; 524 minor_t minor; 525 int minor_idx; 526 boolean_t new_minor; 527 int rv; 528 529 /* read in the port's id property */ 530 if (md_get_prop_val(mdp, node, "id", &portno)) { 531 cmn_err(CE_NOTE, "?i_vldc_add_port: node 0x%lx of added " 532 "list has no 'id' property", node); 533 return (MDEG_FAILURE); 534 } 535 536 if (portno >= VLDC_MAX_PORTS) { 537 cmn_err(CE_NOTE, "?i_vldc_add_port: found port number (%lu) " 538 "larger than maximum supported number of ports", portno); 539 return (MDEG_FAILURE); 540 } 541 542 vport = &(vldcp->port[portno]); 543 544 if (vport->minorp != NULL) { 545 cmn_err(CE_NOTE, "?i_vldc_add_port: trying to add a port (%lu)" 546 " which is already bound", portno); 547 return (MDEG_FAILURE); 548 } 549 550 vport->number = portno; 551 552 /* get all channels for this device (currently only one) */ 553 if (i_vldc_get_port_channel(mdp, node, &vport->ldc_id) == -1) { 554 return (MDEG_FAILURE); 555 } 556 557 /* set the default MTU */ 558 vport->mtu = VLDC_DEFAULT_MTU; 559 560 /* get the service being exported by this port */ 561 if (md_get_prop_str(mdp, node, "vldc-svc-name", &sname)) { 562 cmn_err(CE_NOTE, "?i_vldc_add_port: vdevice has no " 563 "'vldc-svc-name' property"); 564 return (MDEG_FAILURE); 565 } 566 567 /* minor number look up */ 568 for (minor_idx = 0; minor_idx < vldcp->minors_assigned; 569 minor_idx++) { 570 if (strcmp(vldcp->minor_tbl[minor_idx].sname, sname) == 0) { 571 /* found previously assigned minor number */ 572 break; 573 } 574 } 575 576 new_minor = B_FALSE; 577 if (minor_idx == vldcp->minors_assigned) { 578 /* end of lookup - assign new minor number */ 579 if (vldcp->minors_assigned == VLDC_MAX_MINORS) { 580 cmn_err(CE_NOTE, "?i_vldc_add_port: too many minor " 581 "nodes (%d)", minor_idx); 582 return (MDEG_FAILURE); 583 } 584 585 (void) strlcpy(vldcp->minor_tbl[minor_idx].sname, 586 sname, MAXPATHLEN); 587 588 vldcp->minors_assigned++; 589 new_minor = B_TRUE; 590 } 591 592 ASSERT(vldcp->minor_tbl[minor_idx].portno == VLDC_INVALID_PORTNO); 593 594 vport->minorp = &vldcp->minor_tbl[minor_idx]; 595 vldcp->minor_tbl[minor_idx].portno = portno; 596 vldcp->minor_tbl[minor_idx].in_use = 0; 597 598 D1("i_vldc_add_port: port@%d mtu=%d, ldc=%ld, service=%s\n", 599 vport->number, vport->mtu, vport->ldc_id, sname); 600 601 /* 602 * Create a minor node. The minor number is 603 * (vldc_inst << VLDC_INST_SHIFT) | minor_idx 604 */ 605 vldc_inst = ddi_get_instance(vldcp->dip); 606 607 minor = (vldc_inst << VLDC_INST_SHIFT) | (minor_idx); 608 609 rv = ddi_create_minor_node(vldcp->dip, sname, S_IFCHR, 610 minor, DDI_NT_SERIAL, 0); 611 612 if (rv != DDI_SUCCESS) { 613 cmn_err(CE_NOTE, "?i_vldc_add_port: failed to create minor" 614 "node (%u), err = %d", minor, rv); 615 vldcp->minor_tbl[minor_idx].portno = VLDC_INVALID_PORTNO; 616 if (new_minor) { 617 vldcp->minors_assigned--; 618 } 619 return (MDEG_FAILURE); 620 } 621 622 /* 623 * The port is now bound to a minor node and is initially in the 624 * closed state. 625 */ 626 vport->status = VLDC_PORT_CLOSED; 627 628 D1("i_vldc_add_port: port %lu initialized\n", portno); 629 630 return (MDEG_SUCCESS); 631 } 632 633 /* remove a vldc port */ 634 static int 635 i_vldc_remove_port(vldc_t *vldcp, uint_t portno) 636 { 637 vldc_port_t *vport; 638 vldc_minor_t *vminor; 639 640 vport = &(vldcp->port[portno]); 641 vminor = vport->minorp; 642 if (vminor == NULL) { 643 cmn_err(CE_NOTE, "?i_vldc_remove_port: trying to remove a " 644 "port (%u) which is not bound", portno); 645 return (MDEG_FAILURE); 646 } 647 648 /* 649 * Make sure that all new attempts to open or use the minor node 650 * associated with the port will fail. 651 */ 652 mutex_enter(&vminor->lock); 653 vminor->portno = VLDC_INVALID_PORTNO; 654 mutex_exit(&vminor->lock); 655 656 /* send hangup to anyone polling */ 657 pollwakeup(&vport->poll, POLLHUP); 658 659 /* Now wait for all current users of the minor node to finish. */ 660 mutex_enter(&vminor->lock); 661 while (vminor->in_use > 0) { 662 cv_wait(&vminor->cv, &vminor->lock); 663 } 664 665 if ((vport->status == VLDC_PORT_READY) || 666 (vport->status == VLDC_PORT_OPEN)) { 667 /* close the port before it is torn down */ 668 (void) i_vldc_close_port(vldcp, portno); 669 } 670 671 /* remove minor node */ 672 ddi_remove_minor_node(vldcp->dip, vport->minorp->sname); 673 vport->minorp = NULL; 674 675 mutex_exit(&vminor->lock); 676 677 D1("i_vldc_remove_port: removed vldc port %u\n", portno); 678 679 return (MDEG_SUCCESS); 680 } 681 682 /* close a ldc channel */ 683 static int 684 i_vldc_ldc_close(vldc_port_t *vport) 685 { 686 int rv = 0; 687 int err; 688 689 err = ldc_close(vport->ldc_handle); 690 if (err != 0) 691 rv = err; 692 err = ldc_unreg_callback(vport->ldc_handle); 693 if ((err != 0) && (rv != 0)) 694 rv = err; 695 err = ldc_fini(vport->ldc_handle); 696 if ((err != 0) && (rv != 0)) 697 rv = err; 698 699 return (rv); 700 } 701 702 /* close a vldc port */ 703 static int 704 i_vldc_close_port(vldc_t *vldcp, uint_t portno) 705 { 706 vldc_port_t *vport; 707 int rv; 708 709 vport = &(vldcp->port[portno]); 710 711 ASSERT(MUTEX_HELD(&vport->minorp->lock)); 712 713 if (vport->status == VLDC_PORT_CLOSED) { 714 /* nothing to do */ 715 DWARN("i_vldc_close_port: port %d in an unexpected " 716 "state (%d)\n", portno, vport->status); 717 return (DDI_SUCCESS); 718 } 719 720 rv = DDI_SUCCESS; 721 if (vport->status == VLDC_PORT_READY) { 722 rv = i_vldc_ldc_close(vport); 723 } else { 724 ASSERT(vport->status == VLDC_PORT_OPEN); 725 } 726 727 /* free memory */ 728 kmem_free(vport->send_buf, vport->mtu); 729 kmem_free(vport->recv_buf, vport->mtu); 730 731 vport->status = VLDC_PORT_CLOSED; 732 733 return (rv); 734 } 735 736 /* 737 * attach(9E): attach a device to the system. 738 * called once for each instance of the device on the system. 739 */ 740 static int 741 vldc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 742 { 743 int i, instance; 744 vldc_t *vldcp; 745 746 switch (cmd) { 747 748 case DDI_ATTACH: 749 750 instance = ddi_get_instance(dip); 751 752 if (ddi_soft_state_zalloc(vldc_ssp, instance) != DDI_SUCCESS) { 753 return (DDI_FAILURE); 754 } 755 756 vldcp = ddi_get_soft_state(vldc_ssp, instance); 757 if (vldcp == NULL) { 758 ddi_soft_state_free(vldc_ssp, instance); 759 return (ENXIO); 760 } 761 762 D1("vldc_attach: DDI_ATTACH instance=%d\n", instance); 763 764 mutex_init(&vldcp->lock, NULL, MUTEX_DRIVER, NULL); 765 vldcp->dip = dip; 766 vldcp->detaching = B_FALSE; 767 768 for (i = 0; i < VLDC_MAX_PORTS; i++) { 769 /* No minor node association to start with */ 770 vldcp->port[i].minorp = NULL; 771 } 772 773 for (i = 0; i < VLDC_MAX_MINORS; i++) { 774 mutex_init(&(vldcp->minor_tbl[i].lock), NULL, 775 MUTEX_DRIVER, NULL); 776 cv_init(&(vldcp->minor_tbl[i].cv), NULL, 777 CV_DRIVER, NULL); 778 /* No port association to start with */ 779 vldcp->minor_tbl[i].portno = VLDC_INVALID_PORTNO; 780 } 781 782 /* Register for MD update notification */ 783 if (i_vldc_mdeg_register(vldcp) != DDI_SUCCESS) { 784 ddi_soft_state_free(vldc_ssp, instance); 785 return (DDI_FAILURE); 786 } 787 788 return (DDI_SUCCESS); 789 790 case DDI_RESUME: 791 792 return (DDI_SUCCESS); 793 794 default: 795 796 return (DDI_FAILURE); 797 } 798 } 799 800 /* 801 * detach(9E): detach a device from the system. 802 */ 803 static int 804 vldc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 805 { 806 int i, instance; 807 vldc_t *vldcp; 808 809 switch (cmd) { 810 811 case DDI_DETACH: 812 813 instance = ddi_get_instance(dip); 814 815 vldcp = ddi_get_soft_state(vldc_ssp, instance); 816 if (vldcp == NULL) { 817 return (DDI_FAILURE); 818 } 819 820 D1("vldc_detach: DDI_DETACH instance=%d\n", instance); 821 822 mutex_enter(&vldcp->lock); 823 824 /* Fail the detach if all ports have not been removed. */ 825 for (i = 0; i < VLDC_MAX_MINORS; i++) { 826 if (vldcp->minor_tbl[i].portno != VLDC_INVALID_PORTNO) { 827 D1("vldc_detach: vldc@%d:%d is bound, " 828 "detach failed\n", 829 instance, vldcp->minor_tbl[i].portno); 830 mutex_exit(&vldcp->lock); 831 return (DDI_FAILURE); 832 } 833 } 834 835 /* 836 * Prevent MDEG from adding new ports before the callback can 837 * be unregistered. The lock can't be held accross the 838 * unregistration call because a callback may be in progress 839 * and blocked on the lock. 840 */ 841 vldcp->detaching = B_TRUE; 842 843 mutex_exit(&vldcp->lock); 844 845 if (i_vldc_mdeg_unregister(vldcp) != MDEG_SUCCESS) { 846 vldcp->detaching = B_FALSE; 847 return (DDI_FAILURE); 848 } 849 850 /* Tear down all bound ports and free resources. */ 851 for (i = 0; i < VLDC_MAX_MINORS; i++) { 852 if (vldcp->minor_tbl[i].portno != VLDC_INVALID_PORTNO) { 853 (void) i_vldc_remove_port(vldcp, i); 854 } 855 mutex_destroy(&(vldcp->minor_tbl[i].lock)); 856 cv_destroy(&(vldcp->minor_tbl[i].cv)); 857 } 858 859 mutex_destroy(&vldcp->lock); 860 ddi_soft_state_free(vldc_ssp, instance); 861 862 return (DDI_SUCCESS); 863 864 case DDI_SUSPEND: 865 866 return (DDI_SUCCESS); 867 868 default: 869 870 return (DDI_FAILURE); 871 } 872 } 873 874 /* cb_open */ 875 static int 876 vldc_open(dev_t *devp, int flag, int otyp, cred_t *cred) 877 { 878 _NOTE(ARGUNUSED(flag, otyp, cred)) 879 880 int instance; 881 minor_t minor; 882 uint64_t portno; 883 vldc_t *vldcp; 884 vldc_port_t *vport; 885 vldc_minor_t *vminor; 886 887 minor = getminor(*devp); 888 instance = VLDCINST(minor); 889 vldcp = ddi_get_soft_state(vldc_ssp, instance); 890 if (vldcp == NULL) 891 return (ENXIO); 892 893 vminor = VLDCMINOR(vldcp, minor); 894 mutex_enter(&vminor->lock); 895 portno = vminor->portno; 896 if (portno == VLDC_INVALID_PORTNO) { 897 mutex_exit(&vminor->lock); 898 return (ENXIO); 899 } 900 901 vport = &(vldcp->port[portno]); 902 903 D1("vldc_open: opening vldc@%d:%lu\n", instance, portno); 904 905 if (vport->status != VLDC_PORT_CLOSED) { 906 mutex_exit(&vminor->lock); 907 return (EBUSY); 908 } 909 910 vport->recv_buf = kmem_alloc(vport->mtu, KM_SLEEP); 911 vport->send_buf = kmem_alloc(vport->mtu, KM_SLEEP); 912 913 vport->is_stream = B_FALSE; /* assume not a stream */ 914 vport->hanged_up = B_FALSE; 915 916 vport->status = VLDC_PORT_OPEN; 917 918 mutex_exit(&vminor->lock); 919 920 return (DDI_SUCCESS); 921 } 922 923 /* cb_close */ 924 static int 925 vldc_close(dev_t dev, int flag, int otyp, cred_t *cred) 926 { 927 _NOTE(ARGUNUSED(flag, otyp, cred)) 928 929 int instance; 930 minor_t minor; 931 uint64_t portno; 932 vldc_t *vldcp; 933 vldc_minor_t *vminor; 934 int rv; 935 936 minor = getminor(dev); 937 instance = VLDCINST(minor); 938 vldcp = ddi_get_soft_state(vldc_ssp, instance); 939 if (vldcp == NULL) { 940 return (ENXIO); 941 } 942 943 vminor = VLDCMINOR(vldcp, minor); 944 mutex_enter(&vminor->lock); 945 portno = vminor->portno; 946 if (portno == VLDC_INVALID_PORTNO) { 947 mutex_exit(&vminor->lock); 948 return (ENOLINK); 949 } 950 951 D1("vldc_close: closing vldc@%d:%lu\n", instance, portno); 952 953 rv = i_vldc_close_port(vldcp, portno); 954 955 mutex_exit(&vminor->lock); 956 957 return (rv); 958 } 959 960 static int 961 vldc_set_ldc_mode(vldc_port_t *vport, vldc_t *vldcp, int channel_mode) 962 { 963 ldc_attr_t attr; 964 int rv; 965 966 ASSERT(MUTEX_HELD(&vport->minorp->lock)); 967 968 /* validate mode */ 969 switch (channel_mode) { 970 case LDC_MODE_STREAM: 971 vport->is_stream = B_TRUE; 972 break; 973 case LDC_MODE_RAW: 974 case LDC_MODE_UNRELIABLE: 975 case LDC_MODE_RELIABLE: 976 vport->is_stream = B_FALSE; 977 break; 978 default: 979 return (EINVAL); 980 } 981 982 if (vport->status == VLDC_PORT_READY) { 983 rv = i_vldc_ldc_close(vport); 984 vport->status = VLDC_PORT_OPEN; 985 if (rv != 0) { 986 DWARN("vldc_set_ldc_mode: i_vldc_ldc_close " 987 "failed, rv=%d\n", rv); 988 return (rv); 989 } 990 } 991 992 D1("vldc_set_ldc_mode: vport status %d, mode %d\n", 993 vport->status, channel_mode); 994 995 vport->ldc_mode = channel_mode; 996 997 /* initialize the channel */ 998 attr.devclass = LDC_DEV_SERIAL; 999 attr.instance = ddi_get_instance(vldcp->dip); 1000 attr.qlen = VLDC_QUEUE_LEN; 1001 attr.mode = vport->ldc_mode; 1002 1003 if ((rv = ldc_init(vport->ldc_id, &attr, 1004 &vport->ldc_handle)) != 0) { 1005 DWARN("vldc_ioctl_opt_op: ldc_init failed, rv=%d\n", rv); 1006 goto error_init; 1007 } 1008 1009 /* register it */ 1010 if ((rv = ldc_reg_callback(vport->ldc_handle, 1011 i_vldc_cb, (caddr_t)vport)) != 0) { 1012 DWARN("vldc_ioctl_opt_op: ldc_reg_callback failed, rv=%d\n", 1013 rv); 1014 goto error_reg; 1015 } 1016 1017 /* open the channel */ 1018 if ((rv = ldc_open(vport->ldc_handle)) != 0) { 1019 DWARN("vldc_ioctl_opt_op: ldc_open failed, rv=%d\n", rv); 1020 goto error_open; 1021 } 1022 1023 vport->status = VLDC_PORT_READY; 1024 1025 /* 1026 * Attempt to bring the channel up, but do not 1027 * fail if the other end is not up yet. 1028 */ 1029 rv = ldc_up(vport->ldc_handle); 1030 1031 if (rv == ECONNREFUSED) { 1032 D1("vldc_ioctl_opt_op: remote endpoint not up yet\n"); 1033 } else if (rv != 0) { 1034 DWARN("vldc_ioctl_opt_op: ldc_up failed, rv=%d\n", rv); 1035 goto error_up; 1036 } 1037 1038 D1("vldc_ioctl_opt_op: ldc %ld initialized successfully\n", 1039 vport->ldc_id); 1040 1041 return (0); 1042 1043 error_up: 1044 vport->status = VLDC_PORT_OPEN; 1045 (void) ldc_close(vport->ldc_handle); 1046 error_open: 1047 (void) ldc_unreg_callback(vport->ldc_handle); 1048 error_reg: 1049 (void) ldc_fini(vport->ldc_handle); 1050 error_init: 1051 return (rv); 1052 } 1053 1054 /* ioctl to read cookie */ 1055 static int 1056 i_vldc_ioctl_read_cookie(vldc_port_t *vport, int vldc_instance, void *arg, 1057 int mode) 1058 { 1059 vldc_data_t copy_info; 1060 caddr_t buf; 1061 uint64_t len; 1062 int rv; 1063 1064 if (ddi_copyin(arg, ©_info, sizeof (copy_info), mode) == -1) { 1065 return (EFAULT); 1066 } 1067 1068 len = copy_info.length; 1069 if (len > vldc_max_cookie) { 1070 return (EINVAL); 1071 } 1072 1073 /* allocate a temporary buffer */ 1074 buf = kmem_alloc(len, KM_SLEEP); 1075 1076 mutex_enter(&vport->minorp->lock); 1077 1078 D2("i_vldc_ioctl_read_cookie: vldc@%d:%d reading from 0x%lx " 1079 "size 0x%lx to 0x%lx\n", vldc_instance, vport->number, 1080 copy_info.dst_addr, copy_info.length, copy_info.src_addr); 1081 1082 /* read from the HV into the temporary buffer */ 1083 rv = ldc_mem_rdwr_pa(vport->ldc_handle, buf, &len, 1084 (caddr_t)copy_info.dst_addr, LDC_COPY_IN); 1085 if (rv != 0) { 1086 DWARN("i_vldc_ioctl_read_cookie: vldc@%d:%d cannot read " 1087 "address 0x%lx, rv=%d\n", vldc_instance, vport->number, 1088 copy_info.dst_addr, rv); 1089 mutex_exit(&vport->minorp->lock); 1090 kmem_free(buf, copy_info.length); 1091 return (EFAULT); 1092 } 1093 1094 D2("i_vldc_ioctl_read_cookie: vldc@%d:%d read succeeded\n", 1095 vldc_instance, vport->number); 1096 1097 mutex_exit(&vport->minorp->lock); 1098 1099 /* copy data from temporary buffer out to the caller and free buffer */ 1100 rv = ddi_copyout(buf, (caddr_t)copy_info.src_addr, len, mode); 1101 kmem_free(buf, copy_info.length); 1102 if (rv != 0) { 1103 return (EFAULT); 1104 } 1105 1106 /* set the structure to reflect outcome */ 1107 copy_info.length = len; 1108 if (ddi_copyout(©_info, arg, sizeof (copy_info), mode) != 0) { 1109 return (EFAULT); 1110 } 1111 1112 return (0); 1113 } 1114 1115 /* ioctl to write cookie */ 1116 static int 1117 i_vldc_ioctl_write_cookie(vldc_port_t *vport, int vldc_instance, void *arg, 1118 int mode) 1119 { 1120 vldc_data_t copy_info; 1121 caddr_t buf; 1122 uint64_t len; 1123 int rv; 1124 1125 if (ddi_copyin((caddr_t)arg, ©_info, 1126 sizeof (copy_info), mode) != 0) { 1127 return (EFAULT); 1128 } 1129 1130 len = copy_info.length; 1131 if (len > vldc_max_cookie) { 1132 return (EINVAL); 1133 } 1134 1135 D2("i_vldc_ioctl_write_cookie: vldc@%d:%d writing 0x%lx size 0x%lx " 1136 "to 0x%lx\n", vldc_instance, vport->number, copy_info.src_addr, 1137 copy_info.length, copy_info.dst_addr); 1138 1139 /* allocate a temporary buffer */ 1140 buf = kmem_alloc(len, KM_SLEEP); 1141 1142 /* copy into the temporary buffer the data to be written to the HV */ 1143 if (ddi_copyin((caddr_t)copy_info.src_addr, buf, 1144 copy_info.length, mode) != 0) { 1145 kmem_free(buf, copy_info.length); 1146 return (EFAULT); 1147 } 1148 1149 mutex_enter(&vport->minorp->lock); 1150 1151 /* write the data from the temporary buffer to the HV */ 1152 rv = ldc_mem_rdwr_pa(vport->ldc_handle, buf, &len, 1153 (caddr_t)copy_info.dst_addr, LDC_COPY_OUT); 1154 if (rv != 0) { 1155 DWARN("i_vldc_ioctl_write_cookie: vldc@%d:%d failed to write at" 1156 " address 0x%lx\n, rv=%d", vldc_instance, vport->number, 1157 copy_info.dst_addr, rv); 1158 mutex_exit(&vport->minorp->lock); 1159 kmem_free(buf, copy_info.length); 1160 return (EFAULT); 1161 } 1162 1163 D2("i_vldc_ioctl_write_cookie: vldc@%d:%d write succeeded\n", 1164 vldc_instance, vport->number); 1165 1166 mutex_exit(&vport->minorp->lock); 1167 1168 kmem_free(buf, copy_info.length); 1169 1170 /* set the structure to reflect outcome */ 1171 copy_info.length = len; 1172 if (ddi_copyout(©_info, (caddr_t)arg, 1173 sizeof (copy_info), mode) != 0) { 1174 return (EFAULT); 1175 } 1176 1177 return (0); 1178 } 1179 1180 /* vldc specific ioctl option commands */ 1181 static int 1182 i_vldc_ioctl_opt_op(vldc_port_t *vport, vldc_t *vldcp, void *arg, int mode) 1183 { 1184 vldc_opt_op_t vldc_cmd; 1185 uint32_t new_mtu; 1186 int rv = 0; 1187 1188 if (ddi_copyin(arg, &vldc_cmd, sizeof (vldc_cmd), mode) != 0) { 1189 return (EFAULT); 1190 } 1191 1192 D1("vldc_ioctl_opt_op: op %d\n", vldc_cmd.opt_sel); 1193 1194 switch (vldc_cmd.opt_sel) { 1195 1196 case VLDC_OPT_MTU_SZ: 1197 1198 if (vldc_cmd.op_sel == VLDC_OP_GET) { 1199 vldc_cmd.opt_val = vport->mtu; 1200 if (ddi_copyout(&vldc_cmd, arg, 1201 sizeof (vldc_cmd), mode) == -1) { 1202 return (EFAULT); 1203 } 1204 } else { 1205 new_mtu = vldc_cmd.opt_val; 1206 1207 if ((new_mtu < LDC_PACKET_SIZE) || 1208 (new_mtu > vldc_max_mtu)) { 1209 return (EINVAL); 1210 } 1211 1212 mutex_enter(&vport->minorp->lock); 1213 1214 if ((vport->status != VLDC_PORT_CLOSED) && 1215 (new_mtu != vport->mtu)) { 1216 /* 1217 * The port has buffers allocated since it is 1218 * not closed plus the MTU size has changed. 1219 * Reallocate the buffers to the new MTU size. 1220 */ 1221 kmem_free(vport->recv_buf, vport->mtu); 1222 vport->recv_buf = kmem_alloc(new_mtu, KM_SLEEP); 1223 1224 kmem_free(vport->send_buf, vport->mtu); 1225 vport->send_buf = kmem_alloc(new_mtu, KM_SLEEP); 1226 1227 vport->mtu = new_mtu; 1228 } 1229 1230 mutex_exit(&vport->minorp->lock); 1231 } 1232 1233 break; 1234 1235 case VLDC_OPT_STATUS: 1236 1237 if (vldc_cmd.op_sel == VLDC_OP_GET) { 1238 vldc_cmd.opt_val = vport->status; 1239 if (ddi_copyout(&vldc_cmd, arg, 1240 sizeof (vldc_cmd), mode) == -1) { 1241 return (EFAULT); 1242 } 1243 } else { 1244 return (ENOTSUP); 1245 } 1246 1247 break; 1248 1249 case VLDC_OPT_MODE: 1250 1251 if (vldc_cmd.op_sel == VLDC_OP_GET) { 1252 vldc_cmd.opt_val = vport->ldc_mode; 1253 if (ddi_copyout(&vldc_cmd, arg, 1254 sizeof (vldc_cmd), mode) == -1) { 1255 return (EFAULT); 1256 } 1257 } else { 1258 mutex_enter(&vport->minorp->lock); 1259 rv = vldc_set_ldc_mode(vport, vldcp, vldc_cmd.opt_val); 1260 mutex_exit(&vport->minorp->lock); 1261 } 1262 1263 break; 1264 1265 default: 1266 1267 D1("vldc_ioctl_opt_op: unsupported op %d\n", vldc_cmd.opt_sel); 1268 return (ENOTSUP); 1269 } 1270 1271 return (rv); 1272 } 1273 1274 /* cb_ioctl */ 1275 static int 1276 vldc_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, 1277 int *rvalp) 1278 { 1279 _NOTE(ARGUNUSED(credp, rvalp)) 1280 1281 int rv = EINVAL; 1282 int instance; 1283 minor_t minor; 1284 uint64_t portno; 1285 vldc_t *vldcp; 1286 vldc_port_t *vport; 1287 vldc_minor_t *vminor; 1288 1289 minor = getminor(dev); 1290 instance = VLDCINST(minor); 1291 vldcp = ddi_get_soft_state(vldc_ssp, instance); 1292 if (vldcp == NULL) { 1293 return (ENXIO); 1294 } 1295 1296 vminor = VLDCMINOR(vldcp, minor); 1297 mutex_enter(&vminor->lock); 1298 portno = vminor->portno; 1299 if (portno == VLDC_INVALID_PORTNO) { 1300 mutex_exit(&vminor->lock); 1301 return (ENOLINK); 1302 } 1303 vminor->in_use += 1; 1304 mutex_exit(&vminor->lock); 1305 1306 vport = &(vldcp->port[portno]); 1307 1308 D1("vldc_ioctl: vldc@%d:%lu cmd=0x%x\n", instance, portno, cmd); 1309 1310 switch (cmd) { 1311 1312 case VLDC_IOCTL_OPT_OP: 1313 1314 rv = i_vldc_ioctl_opt_op(vport, vldcp, (void *)arg, mode); 1315 break; 1316 1317 case VLDC_IOCTL_READ_COOKIE: 1318 1319 rv = i_vldc_ioctl_read_cookie(vport, instance, 1320 (void *)arg, mode); 1321 break; 1322 1323 case VLDC_IOCTL_WRITE_COOKIE: 1324 1325 rv = i_vldc_ioctl_write_cookie(vport, instance, 1326 (void *)arg, mode); 1327 break; 1328 1329 default: 1330 1331 DWARN("vldc_ioctl: vldc@%d:%lu unknown cmd=0x%x\n", 1332 instance, portno, cmd); 1333 rv = EINVAL; 1334 break; 1335 } 1336 1337 mutex_enter(&vminor->lock); 1338 vminor->in_use -= 1; 1339 if (vminor->in_use == 0) { 1340 cv_signal(&vminor->cv); 1341 } 1342 mutex_exit(&vminor->lock); 1343 1344 D1("vldc_ioctl: rv=%d\n", rv); 1345 1346 return (rv); 1347 } 1348 1349 /* cb_read */ 1350 static int 1351 vldc_read(dev_t dev, struct uio *uiop, cred_t *credp) 1352 { 1353 _NOTE(ARGUNUSED(credp)) 1354 1355 int instance; 1356 minor_t minor; 1357 size_t size = 0; 1358 uint64_t portno; 1359 vldc_t *vldcp; 1360 vldc_port_t *vport; 1361 vldc_minor_t *vminor; 1362 int rv = 0; 1363 1364 minor = getminor(dev); 1365 instance = VLDCINST(minor); 1366 vldcp = ddi_get_soft_state(vldc_ssp, instance); 1367 if (vldcp == NULL) { 1368 return (ENXIO); 1369 } 1370 1371 vminor = VLDCMINOR(vldcp, minor); 1372 mutex_enter(&vminor->lock); 1373 portno = vminor->portno; 1374 if (portno == VLDC_INVALID_PORTNO) { 1375 mutex_exit(&vminor->lock); 1376 return (ENOLINK); 1377 } 1378 1379 D2("vldc_read: vldc@%d:%lu reading data\n", instance, portno); 1380 1381 vport = &(vldcp->port[portno]); 1382 1383 /* check the port status */ 1384 if (vport->status != VLDC_PORT_READY) { 1385 DWARN("vldc_read: vldc@%d:%lu not in the ready state\n", 1386 instance, portno); 1387 mutex_exit(&vminor->lock); 1388 return (ENOTACTIVE); 1389 } 1390 1391 /* read data */ 1392 size = MIN(vport->mtu, uiop->uio_resid); 1393 rv = ldc_read(vport->ldc_handle, vport->recv_buf, &size); 1394 1395 D2("vldc_read: vldc@%d:%lu ldc_read size=%ld, rv=%d\n", 1396 instance, portno, size, rv); 1397 1398 if (rv == 0) { 1399 if (size != 0) { 1400 rv = uiomove(vport->recv_buf, size, UIO_READ, uiop); 1401 } else { 1402 rv = EWOULDBLOCK; 1403 } 1404 } else { 1405 switch (rv) { 1406 case ENOBUFS: 1407 break; 1408 case ETIMEDOUT: 1409 case EWOULDBLOCK: 1410 rv = EWOULDBLOCK; 1411 break; 1412 default: 1413 rv = ECONNRESET; 1414 break; 1415 } 1416 } 1417 1418 mutex_exit(&vminor->lock); 1419 1420 return (rv); 1421 } 1422 1423 /* cb_write */ 1424 static int 1425 vldc_write(dev_t dev, struct uio *uiop, cred_t *credp) 1426 { 1427 _NOTE(ARGUNUSED(credp)) 1428 1429 int instance; 1430 minor_t minor; 1431 size_t size; 1432 size_t orig_size; 1433 uint64_t portno; 1434 vldc_t *vldcp; 1435 vldc_port_t *vport; 1436 vldc_minor_t *vminor; 1437 int rv = EINVAL; 1438 1439 minor = getminor(dev); 1440 instance = VLDCINST(minor); 1441 vldcp = ddi_get_soft_state(vldc_ssp, instance); 1442 if (vldcp == NULL) { 1443 return (ENXIO); 1444 } 1445 1446 vminor = VLDCMINOR(vldcp, minor); 1447 mutex_enter(&vminor->lock); 1448 portno = vminor->portno; 1449 if (portno == VLDC_INVALID_PORTNO) { 1450 mutex_exit(&vminor->lock); 1451 return (ENOLINK); 1452 } 1453 1454 vport = &(vldcp->port[portno]); 1455 1456 /* check the port status */ 1457 if (vport->status != VLDC_PORT_READY) { 1458 DWARN("vldc_write: vldc@%d:%lu not in the ready state\n", 1459 instance, portno); 1460 mutex_exit(&vminor->lock); 1461 return (ENOTACTIVE); 1462 } 1463 1464 orig_size = uiop->uio_resid; 1465 size = orig_size; 1466 1467 if (size > vport->mtu) { 1468 if (vport->is_stream) { 1469 /* can only send MTU size at a time */ 1470 size = vport->mtu; 1471 } else { 1472 mutex_exit(&vminor->lock); 1473 return (EMSGSIZE); 1474 } 1475 } 1476 1477 D2("vldc_write: vldc@%d:%lu writing %lu bytes\n", instance, portno, 1478 size); 1479 1480 rv = uiomove(vport->send_buf, size, UIO_WRITE, uiop); 1481 if (rv == 0) { 1482 rv = ldc_write(vport->ldc_handle, (caddr_t)vport->send_buf, 1483 &size); 1484 if (rv != 0) { 1485 DWARN("vldc_write: vldc@%d:%lu failed writing %lu " 1486 "bytes rv=%d\n", instance, portno, size, rv); 1487 } 1488 } else { 1489 size = 0; 1490 } 1491 1492 mutex_exit(&vminor->lock); 1493 1494 /* resid is total number of bytes *not* sent */ 1495 uiop->uio_resid = orig_size - size; 1496 1497 return (rv); 1498 } 1499 1500 /* cb_chpoll */ 1501 static int 1502 vldc_chpoll(dev_t dev, short events, int anyyet, short *reventsp, 1503 struct pollhead **phpp) 1504 { 1505 int instance; 1506 minor_t minor; 1507 uint64_t portno; 1508 vldc_t *vldcp; 1509 vldc_port_t *vport; 1510 vldc_minor_t *vminor; 1511 ldc_status_t ldc_state; 1512 boolean_t isempty; 1513 int rv; 1514 1515 minor = getminor(dev); 1516 instance = VLDCINST(minor); 1517 vldcp = ddi_get_soft_state(vldc_ssp, instance); 1518 if (vldcp == NULL) { 1519 return (ENXIO); 1520 } 1521 1522 vminor = VLDCMINOR(vldcp, minor); 1523 mutex_enter(&vminor->lock); 1524 portno = vminor->portno; 1525 if (portno == VLDC_INVALID_PORTNO) { 1526 mutex_exit(&vminor->lock); 1527 return (ENOLINK); 1528 } 1529 1530 vport = &(vldcp->port[portno]); 1531 1532 /* check the port status */ 1533 if (vport->status != VLDC_PORT_READY) { 1534 mutex_exit(&vminor->lock); 1535 return (ENOTACTIVE); 1536 } 1537 1538 D2("vldc_chpoll: vldc@%d:%lu polling events 0x%x\n", 1539 instance, portno, events); 1540 1541 rv = ldc_status(vport->ldc_handle, &ldc_state); 1542 if (rv != 0) { 1543 DWARN("vldc_chpoll: vldc@%d:%lu could not get ldc status, " 1544 "rv=%d\n", instance, portno, rv); 1545 mutex_exit(&vminor->lock); 1546 return (EBADFD); 1547 } 1548 1549 *reventsp = 0; 1550 1551 if (ldc_state == LDC_UP) { 1552 /* 1553 * Check if the receive queue is empty and if not, signal that 1554 * there is data ready to read. 1555 */ 1556 if (events & POLLIN) { 1557 if ((ldc_chkq(vport->ldc_handle, &isempty) == 0) && 1558 (isempty == B_FALSE)) { 1559 *reventsp |= POLLIN; 1560 } 1561 } 1562 1563 if (events & POLLOUT) 1564 *reventsp |= POLLOUT; 1565 1566 } else if (vport->hanged_up) { 1567 *reventsp |= POLLHUP; 1568 vport->hanged_up = B_FALSE; 1569 } 1570 1571 mutex_exit(&vminor->lock); 1572 1573 if (((*reventsp) == 0) && (!anyyet)) { 1574 *phpp = &vport->poll; 1575 } 1576 1577 D2("vldc_chpoll: vldc@%d:%lu ev=0x%x, rev=0x%x\n", 1578 instance, portno, events, *reventsp); 1579 1580 return (0); 1581 } 1582