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 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26/* 27 * The softmac driver is used to "unify" non-GLDv3 drivers to the GLDv3 28 * framework. It also creates the kernel datalink structure for each 29 * physical network device. 30 * 31 * Specifically, a softmac will be created for each physical network device 32 * (dip) during the device's post-attach process. When this softmac is 33 * created, the following will also be done: 34 * - create the device's <link name, linkid> mapping; 35 * - register the mac if this is a non-GLDv3 device and the media type is 36 * supported by the GLDv3 framework; 37 * - create the kernel data-link structure for this physical device; 38 * 39 * This softmac will be destroyed during the device's pre-detach process, 40 * and all the above will be undone. 41 */ 42 43#include <sys/types.h> 44#include <sys/file.h> 45#include <sys/cred.h> 46#include <sys/dlpi.h> 47#include <sys/mac_provider.h> 48#include <sys/disp.h> 49#include <sys/sunndi.h> 50#include <sys/modhash.h> 51#include <sys/stropts.h> 52#include <sys/sysmacros.h> 53#include <sys/vlan.h> 54#include <sys/softmac_impl.h> 55#include <sys/softmac.h> 56#include <sys/dls.h> 57 58/* Used as a parameter to the mod hash walk of softmac structures */ 59typedef struct { 60 softmac_t *smw_softmac; 61 boolean_t smw_retry; 62} softmac_walk_t; 63 64/* 65 * Softmac hash table including softmacs for both style-2 and style-1 devices. 66 */ 67static krwlock_t softmac_hash_lock; 68static mod_hash_t *softmac_hash; 69static kmutex_t smac_global_lock; 70static kcondvar_t smac_global_cv; 71 72static kmem_cache_t *softmac_cachep; 73 74#define SOFTMAC_HASHSZ 64 75 76static void softmac_create_task(void *); 77static void softmac_mac_register(softmac_t *); 78static int softmac_create_datalink(softmac_t *); 79static int softmac_m_start(void *); 80static void softmac_m_stop(void *); 81static int softmac_m_open(void *); 82static void softmac_m_close(void *); 83static boolean_t softmac_m_getcapab(void *, mac_capab_t, void *); 84static int softmac_m_setprop(void *, const char *, mac_prop_id_t, 85 uint_t, const void *); 86static int softmac_m_getprop(void *, const char *, mac_prop_id_t, 87 uint_t, void *); 88static void softmac_m_propinfo(void *, const char *, mac_prop_id_t, 89 mac_prop_info_handle_t); 90 91#define SOFTMAC_M_CALLBACK_FLAGS \ 92 (MC_IOCTL | MC_GETCAPAB | MC_OPEN | MC_CLOSE | MC_SETPROP | \ 93 MC_GETPROP | MC_PROPINFO) 94 95static mac_callbacks_t softmac_m_callbacks = { 96 SOFTMAC_M_CALLBACK_FLAGS, 97 softmac_m_stat, 98 softmac_m_start, 99 softmac_m_stop, 100 softmac_m_promisc, 101 softmac_m_multicst, 102 softmac_m_unicst, 103 softmac_m_tx, 104 NULL, 105 softmac_m_ioctl, 106 softmac_m_getcapab, 107 softmac_m_open, 108 softmac_m_close, 109 softmac_m_setprop, 110 softmac_m_getprop, 111 softmac_m_propinfo 112}; 113 114/*ARGSUSED*/ 115static int 116softmac_constructor(void *buf, void *arg, int kmflag) 117{ 118 softmac_t *softmac = buf; 119 120 bzero(buf, sizeof (softmac_t)); 121 mutex_init(&softmac->smac_mutex, NULL, MUTEX_DEFAULT, NULL); 122 mutex_init(&softmac->smac_active_mutex, NULL, MUTEX_DEFAULT, NULL); 123 mutex_init(&softmac->smac_fp_mutex, NULL, MUTEX_DEFAULT, NULL); 124 cv_init(&softmac->smac_cv, NULL, CV_DEFAULT, NULL); 125 cv_init(&softmac->smac_fp_cv, NULL, CV_DEFAULT, NULL); 126 list_create(&softmac->smac_sup_list, sizeof (softmac_upper_t), 127 offsetof(softmac_upper_t, su_list_node)); 128 return (0); 129} 130 131/*ARGSUSED*/ 132static void 133softmac_destructor(void *buf, void *arg) 134{ 135 softmac_t *softmac = buf; 136 137 ASSERT(softmac->smac_fp_disable_clients == 0); 138 ASSERT(!softmac->smac_fastpath_admin_disabled); 139 140 ASSERT(!(softmac->smac_flags & SOFTMAC_ATTACH_DONE)); 141 ASSERT(softmac->smac_hold_cnt == 0); 142 ASSERT(softmac->smac_attachok_cnt == 0); 143 ASSERT(softmac->smac_mh == NULL); 144 ASSERT(softmac->smac_softmac[0] == NULL && 145 softmac->smac_softmac[1] == NULL); 146 ASSERT(softmac->smac_state == SOFTMAC_INITIALIZED); 147 ASSERT(softmac->smac_lower == NULL); 148 ASSERT(softmac->smac_active == B_FALSE); 149 ASSERT(softmac->smac_nactive == 0); 150 ASSERT(list_is_empty(&softmac->smac_sup_list)); 151 152 list_destroy(&softmac->smac_sup_list); 153 mutex_destroy(&softmac->smac_mutex); 154 mutex_destroy(&softmac->smac_active_mutex); 155 mutex_destroy(&softmac->smac_fp_mutex); 156 cv_destroy(&softmac->smac_cv); 157 cv_destroy(&softmac->smac_fp_cv); 158} 159 160void 161softmac_init() 162{ 163 softmac_hash = mod_hash_create_extended("softmac_hash", 164 SOFTMAC_HASHSZ, mod_hash_null_keydtor, mod_hash_null_valdtor, 165 mod_hash_bystr, NULL, mod_hash_strkey_cmp, KM_SLEEP); 166 167 rw_init(&softmac_hash_lock, NULL, RW_DEFAULT, NULL); 168 mutex_init(&smac_global_lock, NULL, MUTEX_DRIVER, NULL); 169 cv_init(&smac_global_cv, NULL, CV_DRIVER, NULL); 170 171 softmac_cachep = kmem_cache_create("softmac_cache", 172 sizeof (softmac_t), 0, softmac_constructor, 173 softmac_destructor, NULL, NULL, NULL, 0); 174 ASSERT(softmac_cachep != NULL); 175 softmac_fp_init(); 176} 177 178void 179softmac_fini() 180{ 181 softmac_fp_fini(); 182 kmem_cache_destroy(softmac_cachep); 183 rw_destroy(&softmac_hash_lock); 184 mod_hash_destroy_hash(softmac_hash); 185 mutex_destroy(&smac_global_lock); 186 cv_destroy(&smac_global_cv); 187} 188 189/* ARGSUSED */ 190static uint_t 191softmac_exist(mod_hash_key_t key, mod_hash_val_t *val, void *arg) 192{ 193 boolean_t *pexist = arg; 194 195 *pexist = B_TRUE; 196 return (MH_WALK_TERMINATE); 197} 198 199boolean_t 200softmac_busy() 201{ 202 boolean_t exist = B_FALSE; 203 204 rw_enter(&softmac_hash_lock, RW_READER); 205 mod_hash_walk(softmac_hash, softmac_exist, &exist); 206 rw_exit(&softmac_hash_lock); 207 return (exist); 208} 209 210/* 211 * 212 * softmac_create() is called for each minor node during the post-attach of 213 * each DDI_NT_NET device instance. Note that it is possible that a device 214 * instance has two minor nodes (DLPI style-1 and style-2), so that for that 215 * specific device, softmac_create() could be called twice. 216 * 217 * A softmac_t is used to track each DDI_NT_NET device, and a softmac_dev_t 218 * is created to track each minor node. 219 * 220 * For each minor node of a legacy device, a taskq is started to finish 221 * softmac_mac_register(), which will finish the rest of work (see comments 222 * above softmac_mac_register()). 223 * 224 * softmac state machine 225 * -------------------------------------------------------------------------- 226 * OLD STATE EVENT NEW STATE 227 * -------------------------------------------------------------------------- 228 * UNINIT attach of 1st minor node ATTACH_INPROG 229 * okcnt = 0 net_postattach -> softmac_create okcnt = 1 230 * 231 * ATTACH_INPROG attach of 2nd minor node (GLDv3) ATTACH_DONE 232 * okcnt = 1 net_postattach -> softmac_create okcnt = 2 233 * 234 * ATTACH_INPROG attach of 2nd minor node (legacy) ATTACH_INPROG 235 * okcnt = 1 net_postattach -> softmac_create okcnt = 2 236 * schedule softmac_mac_register 237 * 238 * ATTACH_INPROG legacy device node ATTACH_DONE 239 * okcnt = 2 softmac_mac_register okcnt = 2 240 * 241 * ATTACH_DONE detach of 1st minor node DETACH_INPROG 242 * okcnt = 2 (success) okcnt = 1 243 * 244 * DETACH_INPROG detach of 2nd minor node UNINIT (or free) 245 * okcnt = 1 (success) okcnt = 0 246 * 247 * ATTACH_DONE detach failure state unchanged 248 * DETACH_INPROG left = okcnt 249 * 250 * DETACH_INPROG reattach ATTACH_INPROG 251 * okcnt = 0,1 net_postattach -> softmac_create 252 * 253 * ATTACH_DONE reattach ATTACH_DONE 254 * left != 0 net_postattach -> softmac_create left = 0 255 * 256 * Abbreviation notes: 257 * states have SOFTMAC_ prefix, 258 * okcnt - softmac_attach_okcnt, 259 * left - softmac_attached_left 260 */ 261 262#ifdef DEBUG 263void 264softmac_state_verify(softmac_t *softmac) 265{ 266 ASSERT(MUTEX_HELD(&softmac->smac_mutex)); 267 268 /* 269 * There are at most 2 minor nodes, one per DLPI style 270 */ 271 ASSERT(softmac->smac_cnt <= 2 && softmac->smac_attachok_cnt <= 2); 272 273 /* 274 * The smac_attachok_cnt represents the number of attaches i.e. the 275 * number of times net_postattach -> softmac_create() has been called 276 * for a device instance. 277 */ 278 ASSERT(softmac->smac_attachok_cnt == SMAC_NONZERO_NODECNT(softmac)); 279 280 /* 281 * softmac_create (or softmac_mac_register) -> softmac_create_datalink 282 * happens only after all minor nodes have been attached 283 */ 284 ASSERT(softmac->smac_state != SOFTMAC_ATTACH_DONE || 285 softmac->smac_attachok_cnt == softmac->smac_cnt); 286 287 if (softmac->smac_attachok_cnt == 0) { 288 ASSERT(softmac->smac_state == SOFTMAC_UNINIT); 289 ASSERT(softmac->smac_mh == NULL); 290 } else if (softmac->smac_attachok_cnt < softmac->smac_cnt) { 291 ASSERT(softmac->smac_state == SOFTMAC_ATTACH_INPROG || 292 softmac->smac_state == SOFTMAC_DETACH_INPROG); 293 ASSERT(softmac->smac_mh == NULL); 294 } else { 295 /* 296 * In the stable condition the state whould be 297 * SOFTMAC_ATTACH_DONE. But there is a small transient window 298 * in softmac_destroy where we change the state to 299 * SOFTMAC_DETACH_INPROG and drop the lock before doing 300 * the link destroy 301 */ 302 ASSERT(softmac->smac_attachok_cnt == softmac->smac_cnt); 303 ASSERT(softmac->smac_state != SOFTMAC_UNINIT); 304 } 305 if (softmac->smac_mh != NULL) 306 ASSERT(softmac->smac_attachok_cnt == softmac->smac_cnt); 307} 308#endif 309 310#ifdef DEBUG 311#define SOFTMAC_STATE_VERIFY(softmac) softmac_state_verify(softmac) 312#else 313#define SOFTMAC_STATE_VERIFY(softmac) 314#endif 315 316int 317softmac_create(dev_info_t *dip, dev_t dev) 318{ 319 char devname[MAXNAMELEN]; 320 softmac_t *softmac; 321 softmac_dev_t *softmac_dev = NULL; 322 int index; 323 int ppa, err = 0; 324 325 /* 326 * Force the softmac driver to be attached. 327 */ 328 if (i_ddi_attach_pseudo_node(SOFTMAC_DEV_NAME) == NULL) { 329 cmn_err(CE_WARN, "softmac_create:softmac attach fails"); 330 return (ENXIO); 331 } 332 333 if (GLDV3_DRV(ddi_driver_major(dip))) { 334 minor_t minor = getminor(dev); 335 /* 336 * For GLDv3, we don't care about the DLPI style 2 337 * compatibility node. (We know that all such devices 338 * have style 1 nodes.) 339 */ 340 if ((strcmp(ddi_driver_name(dip), "clone") == 0) || 341 (getmajor(dev) == ddi_name_to_major("clone")) || 342 (minor == 0)) { 343 return (0); 344 } 345 346 /* 347 * Likewise, we know that the minor number for DLPI style 1 348 * nodes is constrained to a maximum value. 349 */ 350 if (minor >= DLS_MAX_MINOR) { 351 return (ENOTSUP); 352 } 353 /* 354 * Otherwise we can decode the instance from the minor number, 355 * which allows for situations with multiple mac instances 356 * for a single dev_info_t. 357 */ 358 ppa = DLS_MINOR2INST(minor); 359 } else { 360 /* 361 * For legacy drivers, we just have to limit them to 362 * two minor nodes, one style 1 and one style 2, and 363 * we assume the ddi_get_instance() is the PPA. 364 * Drivers that need more flexibility should be ported 365 * to GLDv3. 366 */ 367 ppa = ddi_get_instance(dip); 368 if (i_ddi_minor_node_count(dip, DDI_NT_NET) > 2) { 369 cmn_err(CE_WARN, "%s has more than 2 minor nodes; " 370 "unsupported", devname); 371 return (ENOTSUP); 372 } 373 } 374 375 (void) snprintf(devname, MAXNAMELEN, "%s%d", ddi_driver_name(dip), ppa); 376 377 /* 378 * Check whether the softmac for the specified device already exists 379 */ 380 rw_enter(&softmac_hash_lock, RW_WRITER); 381 if ((mod_hash_find(softmac_hash, (mod_hash_key_t)devname, 382 (mod_hash_val_t *)&softmac)) != 0) { 383 384 softmac = kmem_cache_alloc(softmac_cachep, KM_SLEEP); 385 (void) strlcpy(softmac->smac_devname, devname, MAXNAMELEN); 386 387 err = mod_hash_insert(softmac_hash, 388 (mod_hash_key_t)softmac->smac_devname, 389 (mod_hash_val_t)softmac); 390 ASSERT(err == 0); 391 mutex_enter(&smac_global_lock); 392 cv_broadcast(&smac_global_cv); 393 mutex_exit(&smac_global_lock); 394 } 395 396 mutex_enter(&softmac->smac_mutex); 397 SOFTMAC_STATE_VERIFY(softmac); 398 if (softmac->smac_state != SOFTMAC_ATTACH_DONE) 399 softmac->smac_state = SOFTMAC_ATTACH_INPROG; 400 if (softmac->smac_attachok_cnt == 0) { 401 /* 402 * Initialize the softmac if this is the post-attach of the 403 * first minor node. 404 */ 405 softmac->smac_flags = 0; 406 softmac->smac_umajor = ddi_driver_major(dip); 407 softmac->smac_uppa = ppa; 408 409 /* 410 * For GLDv3, we ignore the style 2 node (see the logic 411 * above on that), and we should have exactly one attach 412 * per MAC instance (possibly more than one per dev_info_t). 413 */ 414 if (GLDV3_DRV(ddi_driver_major(dip))) { 415 softmac->smac_flags |= SOFTMAC_GLDV3; 416 softmac->smac_cnt = 1; 417 } else { 418 softmac->smac_cnt = 419 i_ddi_minor_node_count(dip, DDI_NT_NET); 420 } 421 } 422 423 index = (getmajor(dev) == ddi_name_to_major("clone")); 424 if (softmac->smac_softmac[index] != NULL) { 425 /* 426 * This is possible if the post_attach() is called after 427 * pre_detach() fails. This seems to be a defect of the DACF 428 * framework. We work around it by using a smac_attached_left 429 * field that tracks this 430 */ 431 ASSERT(softmac->smac_attached_left != 0); 432 softmac->smac_attached_left--; 433 mutex_exit(&softmac->smac_mutex); 434 rw_exit(&softmac_hash_lock); 435 return (0); 436 437 } 438 mutex_exit(&softmac->smac_mutex); 439 rw_exit(&softmac_hash_lock); 440 441 softmac_dev = kmem_zalloc(sizeof (softmac_dev_t), KM_SLEEP); 442 softmac_dev->sd_dev = dev; 443 444 mutex_enter(&softmac->smac_mutex); 445 softmac->smac_softmac[index] = softmac_dev; 446 /* 447 * Continue to register the mac and create the datalink only when all 448 * the minor nodes are attached. 449 */ 450 if (++softmac->smac_attachok_cnt != softmac->smac_cnt) { 451 mutex_exit(&softmac->smac_mutex); 452 return (0); 453 } 454 455 /* 456 * All of the minor nodes have been attached; start a taskq 457 * to do the rest of the work. We use a taskq instead of 458 * doing the work here because: 459 * 460 * We could be called as a result of a open() system call 461 * where spec_open() already SLOCKED the snode. Using a taskq 462 * sidesteps the risk that our ldi_open_by_dev() call would 463 * deadlock trying to set SLOCKED on the snode again. 464 * 465 * The devfs design requires that the downcalls don't use any 466 * interruptible cv_wait which happens when we do door upcalls. 467 * Otherwise the downcalls which may be holding devfs resources 468 * may cause a deadlock if the thread is stopped. Also we need to make 469 * sure these downcalls into softmac_create or softmac_destroy 470 * don't cv_wait on any devfs related condition. Thus softmac_destroy 471 * returns EBUSY if the asynchronous threads started in softmac_create 472 * haven't finished. 473 */ 474 (void) taskq_dispatch(system_taskq, softmac_create_task, 475 softmac, TQ_SLEEP); 476 mutex_exit(&softmac->smac_mutex); 477 return (0); 478} 479 480static boolean_t 481softmac_m_getcapab(void *arg, mac_capab_t cap, void *cap_data) 482{ 483 softmac_t *softmac = arg; 484 485 if (!(softmac->smac_capab_flags & cap)) 486 return (B_FALSE); 487 488 switch (cap) { 489 case MAC_CAPAB_HCKSUM: { 490 uint32_t *txflags = cap_data; 491 492 *txflags = softmac->smac_hcksum_txflags; 493 break; 494 } 495 case MAC_CAPAB_LEGACY: { 496 mac_capab_legacy_t *legacy = cap_data; 497 498 /* 499 * The caller is not interested in the details. 500 */ 501 if (legacy == NULL) 502 break; 503 504 legacy->ml_unsup_note = ~softmac->smac_notifications & 505 (DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN | DL_NOTE_SPEED); 506 legacy->ml_active_set = softmac_active_set; 507 legacy->ml_active_clear = softmac_active_clear; 508 legacy->ml_fastpath_disable = softmac_fastpath_disable; 509 legacy->ml_fastpath_enable = softmac_fastpath_enable; 510 legacy->ml_dev = makedevice(softmac->smac_umajor, 511 softmac->smac_uppa + 1); 512 break; 513 } 514 515 /* 516 * For the capabilities below, there's nothing for us to fill in; 517 * simply return B_TRUE if we support it. 518 */ 519 case MAC_CAPAB_NO_ZCOPY: 520 case MAC_CAPAB_NO_NATIVEVLAN: 521 default: 522 break; 523 } 524 return (B_TRUE); 525} 526 527static int 528softmac_update_info(softmac_t *softmac, datalink_id_t *linkidp) 529{ 530 datalink_id_t linkid = DATALINK_INVALID_LINKID; 531 uint32_t media; 532 int err; 533 534 if ((err = dls_mgmt_update(softmac->smac_devname, softmac->smac_media, 535 softmac->smac_flags & SOFTMAC_NOSUPP, &media, &linkid)) == 0) { 536 *linkidp = linkid; 537 } 538 539 if (err == EEXIST) { 540 /* 541 * There is a link name conflict. Either: 542 * 543 * - An existing link with the same device name with a 544 * different media type from of the given type. 545 * Mark this link back to persistent only; or 546 * 547 * - We cannot assign the "suggested" name because 548 * GLDv3 and therefore vanity naming is not supported 549 * for this link type. Delete this link's <link name, 550 * linkid> mapping. 551 */ 552 if (media != softmac->smac_media) { 553 cmn_err(CE_WARN, "%s device %s conflicts with " 554 "existing %s device %s.", 555 dl_mactypestr(softmac->smac_media), 556 softmac->smac_devname, dl_mactypestr(media), 557 softmac->smac_devname); 558 (void) dls_mgmt_destroy(linkid, B_FALSE); 559 } else { 560 cmn_err(CE_WARN, "link name %s is already in-use.", 561 softmac->smac_devname); 562 (void) dls_mgmt_destroy(linkid, B_TRUE); 563 } 564 565 cmn_err(CE_WARN, "%s device might not be available " 566 "for use.", softmac->smac_devname); 567 cmn_err(CE_WARN, "See dladm(1M) for more information."); 568 } 569 570 return (err); 571} 572 573/* 574 * This function: 575 * 1. provides the link's media type to dlmgmtd. 576 * 2. creates the GLDv3 datalink if the media type is supported by GLDv3. 577 */ 578static int 579softmac_create_datalink(softmac_t *softmac) 580{ 581 datalink_id_t linkid = DATALINK_INVALID_LINKID; 582 int err; 583 584 /* 585 * Inform dlmgmtd of this link so that softmac_hold_device() is able 586 * to know the existence of this link. If this failed with EBADF, 587 * it might be because dlmgmtd was not started in time (e.g., 588 * diskless boot); ignore the failure and continue to create 589 * the GLDv3 datalink if needed. 590 */ 591 err = dls_mgmt_create(softmac->smac_devname, 592 makedevice(softmac->smac_umajor, softmac->smac_uppa + 1), 593 DATALINK_CLASS_PHYS, DL_OTHER, B_TRUE, &linkid); 594 if (err != 0 && err != EBADF) 595 return (err); 596 597 /* 598 * Provide the media type of the physical link to dlmgmtd. 599 */ 600 if ((err != EBADF) && 601 ((err = softmac_update_info(softmac, &linkid)) != 0)) { 602 return (err); 603 } 604 605 /* 606 * Create the GLDv3 datalink. 607 */ 608 if (!(softmac->smac_flags & SOFTMAC_NOSUPP)) { 609 err = dls_devnet_create(softmac->smac_mh, linkid, 610 crgetzoneid(CRED())); 611 if (err != 0) { 612 cmn_err(CE_WARN, "dls_devnet_create failed for %s", 613 softmac->smac_devname); 614 return (err); 615 } 616 } 617 618 if (linkid == DATALINK_INVALID_LINKID) { 619 mutex_enter(&softmac->smac_mutex); 620 softmac->smac_flags |= SOFTMAC_NEED_RECREATE; 621 mutex_exit(&softmac->smac_mutex); 622 } 623 624 return (0); 625} 626 627static void 628softmac_create_task(void *arg) 629{ 630 softmac_t *softmac = arg; 631 mac_handle_t mh; 632 int err; 633 634 if (!GLDV3_DRV(softmac->smac_umajor)) { 635 softmac_mac_register(softmac); 636 return; 637 } 638 639 if ((err = mac_open(softmac->smac_devname, &mh)) != 0) 640 goto done; 641 642 mutex_enter(&softmac->smac_mutex); 643 softmac->smac_media = (mac_info(mh))->mi_nativemedia; 644 softmac->smac_mh = mh; 645 mutex_exit(&softmac->smac_mutex); 646 647 /* 648 * We can safely release the reference on the mac because 649 * this mac will only be unregistered and destroyed when 650 * the device detaches, and the softmac will be destroyed 651 * before then (in the pre-detach routine of the device). 652 */ 653 mac_close(mh); 654 655 /* 656 * Create the GLDv3 datalink for this mac. 657 */ 658 err = softmac_create_datalink(softmac); 659 660done: 661 mutex_enter(&softmac->smac_mutex); 662 if (err != 0) 663 softmac->smac_mh = NULL; 664 softmac->smac_attacherr = err; 665 softmac->smac_state = SOFTMAC_ATTACH_DONE; 666 cv_broadcast(&softmac->smac_cv); 667 mutex_exit(&softmac->smac_mutex); 668} 669 670/* 671 * This function is only called for legacy devices. It: 672 * 1. registers the MAC for the legacy devices whose media type is supported 673 * by the GLDv3 framework. 674 * 2. creates the GLDv3 datalink if the media type is supported by GLDv3. 675 */ 676static void 677softmac_mac_register(softmac_t *softmac) 678{ 679 softmac_dev_t *softmac_dev; 680 dev_t dev; 681 ldi_handle_t lh = NULL; 682 ldi_ident_t li = NULL; 683 int index; 684 boolean_t native_vlan = B_FALSE; 685 int err; 686 687 /* 688 * Note that we do not need any locks to access this softmac pointer, 689 * as softmac_destroy() will wait until this function is called. 690 */ 691 ASSERT(softmac != NULL); 692 ASSERT(softmac->smac_state == SOFTMAC_ATTACH_INPROG && 693 softmac->smac_attachok_cnt == softmac->smac_cnt); 694 695 if ((err = ldi_ident_from_dip(softmac_dip, &li)) != 0) { 696 mutex_enter(&softmac->smac_mutex); 697 goto done; 698 } 699 700 /* 701 * Determine whether this legacy device support VLANs by opening 702 * the style-2 device node (if it exists) and attaching to a VLAN 703 * PPA (1000 + ppa). 704 */ 705 dev = makedevice(ddi_name_to_major("clone"), softmac->smac_umajor); 706 err = ldi_open_by_dev(&dev, OTYP_CHR, FREAD|FWRITE, kcred, &lh, li); 707 if (err == 0) { 708 if (dl_attach(lh, softmac->smac_uppa + 1 * 1000, NULL) == 0) 709 native_vlan = B_TRUE; 710 (void) ldi_close(lh, FREAD|FWRITE, kcred); 711 } 712 713 err = EINVAL; 714 for (index = 0; index < 2; index++) { 715 dl_info_ack_t dlia; 716 dl_error_ack_t dlea; 717 uint32_t notes; 718 struct strioctl iocb; 719 uint32_t margin; 720 int rval; 721 722 if ((softmac_dev = softmac->smac_softmac[index]) == NULL) 723 continue; 724 725 softmac->smac_dev = dev = softmac_dev->sd_dev; 726 if (ldi_open_by_dev(&dev, OTYP_CHR, FREAD|FWRITE, kcred, &lh, 727 li) != 0) { 728 continue; 729 } 730 731 /* 732 * Pop all the intermediate modules in order to negotiate 733 * capabilities correctly. 734 */ 735 while (ldi_ioctl(lh, I_POP, 0, FKIOCTL, kcred, &rval) == 0) 736 ; 737 738 /* DLPI style-1 or DLPI style-2? */ 739 if ((rval = dl_info(lh, &dlia, NULL, NULL, &dlea)) != 0) { 740 if (rval == ENOTSUP) { 741 cmn_err(CE_NOTE, "softmac: received " 742 "DL_ERROR_ACK to DL_INFO_ACK; " 743 "DLPI errno 0x%x, UNIX errno %d", 744 dlea.dl_errno, dlea.dl_unix_errno); 745 } 746 (void) ldi_close(lh, FREAD|FWRITE, kcred); 747 continue; 748 } 749 750 /* 751 * Currently only DL_ETHER has GLDv3 mac plugin support. 752 * For media types that GLDv3 does not support, create a 753 * link id for it. 754 */ 755 if ((softmac->smac_media = dlia.dl_mac_type) != DL_ETHER) { 756 (void) ldi_close(lh, FREAD|FWRITE, kcred); 757 err = 0; 758 break; 759 } 760 761 if ((dlia.dl_provider_style == DL_STYLE2) && 762 (dl_attach(lh, softmac->smac_uppa, NULL) != 0)) { 763 (void) ldi_close(lh, FREAD|FWRITE, kcred); 764 continue; 765 } 766 767 if ((rval = dl_bind(lh, 0, NULL)) != 0) { 768 if (rval == ENOTSUP) { 769 cmn_err(CE_NOTE, "softmac: received " 770 "DL_ERROR_ACK to DL_BIND_ACK; " 771 "DLPI errno 0x%x, UNIX errno %d", 772 dlea.dl_errno, dlea.dl_unix_errno); 773 } 774 (void) ldi_close(lh, FREAD|FWRITE, kcred); 775 continue; 776 } 777 778 /* 779 * Call dl_info() after dl_bind() because some drivers only 780 * provide correct information (e.g. MAC address) once bound. 781 */ 782 softmac->smac_addrlen = sizeof (softmac->smac_unicst_addr); 783 if ((rval = dl_info(lh, &dlia, softmac->smac_unicst_addr, 784 &softmac->smac_addrlen, &dlea)) != 0) { 785 if (rval == ENOTSUP) { 786 cmn_err(CE_NOTE, "softmac: received " 787 "DL_ERROR_ACK to DL_INFO_ACK; " 788 "DLPI errno 0x%x, UNIX errno %d", 789 dlea.dl_errno, dlea.dl_unix_errno); 790 } 791 (void) ldi_close(lh, FREAD|FWRITE, kcred); 792 continue; 793 } 794 795 softmac->smac_style = dlia.dl_provider_style; 796 softmac->smac_saplen = ABS(dlia.dl_sap_length); 797 softmac->smac_min_sdu = dlia.dl_min_sdu; 798 softmac->smac_max_sdu = dlia.dl_max_sdu; 799 800 if ((softmac->smac_saplen != sizeof (uint16_t)) || 801 (softmac->smac_addrlen != ETHERADDRL) || 802 (dlia.dl_brdcst_addr_length != ETHERADDRL) || 803 (dlia.dl_brdcst_addr_offset == 0)) { 804 (void) ldi_close(lh, FREAD|FWRITE, kcred); 805 continue; 806 } 807 808 /* 809 * Check other DLPI capabilities. Note that this must be after 810 * dl_bind() because some drivers return DL_ERROR_ACK if the 811 * stream is not bound. It is also before mac_register(), so 812 * we don't need any lock protection here. 813 */ 814 softmac->smac_capab_flags = 815 (MAC_CAPAB_NO_ZCOPY | MAC_CAPAB_LEGACY); 816 817 softmac->smac_no_capability_req = B_FALSE; 818 if (softmac_fill_capab(lh, softmac) != 0) 819 softmac->smac_no_capability_req = B_TRUE; 820 821 /* 822 * Check the margin of the underlying driver. 823 */ 824 margin = 0; 825 iocb.ic_cmd = DLIOCMARGININFO; 826 iocb.ic_timout = INFTIM; 827 iocb.ic_len = sizeof (margin); 828 iocb.ic_dp = (char *)&margin; 829 softmac->smac_margin = 0; 830 831 if (ldi_ioctl(lh, I_STR, (intptr_t)&iocb, FKIOCTL, kcred, 832 &rval) == 0) { 833 softmac->smac_margin = margin; 834 } 835 836 /* 837 * If the legacy driver doesn't support DLIOCMARGININFO, but 838 * it can support native VLAN, correct its margin value to 4. 839 */ 840 if (native_vlan) { 841 if (softmac->smac_margin == 0) 842 softmac->smac_margin = VLAN_TAGSZ; 843 } else { 844 softmac->smac_capab_flags |= MAC_CAPAB_NO_NATIVEVLAN; 845 } 846 847 /* 848 * Not all drivers support DL_NOTIFY_REQ, so ignore ENOTSUP. 849 */ 850 softmac->smac_notifications = 0; 851 notes = DL_NOTE_PHYS_ADDR | DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN; 852 switch (dl_notify(lh, ¬es, NULL)) { 853 case 0: 854 softmac->smac_notifications = notes; 855 break; 856 case ENOTSUP: 857 break; 858 default: 859 (void) ldi_close(lh, FREAD|FWRITE, kcred); 860 continue; 861 } 862 863 (void) ldi_close(lh, FREAD|FWRITE, kcred); 864 err = 0; 865 break; 866 } 867 ldi_ident_release(li); 868 869 mutex_enter(&softmac->smac_mutex); 870 871 if (err != 0) 872 goto done; 873 874 if (softmac->smac_media != DL_ETHER) 875 softmac->smac_flags |= SOFTMAC_NOSUPP; 876 877 /* 878 * Finally, we're ready to register ourselves with the MAC layer 879 * interface; if this succeeds, we're all ready to start() 880 */ 881 if (!(softmac->smac_flags & SOFTMAC_NOSUPP)) { 882 mac_register_t *macp; 883 884 if ((macp = mac_alloc(MAC_VERSION)) == NULL) { 885 err = ENOMEM; 886 goto done; 887 } 888 889 macp->m_type_ident = MAC_PLUGIN_IDENT_ETHER; 890 macp->m_driver = softmac; 891 macp->m_dip = softmac_dip; 892 893 macp->m_margin = softmac->smac_margin; 894 macp->m_src_addr = softmac->smac_unicst_addr; 895 macp->m_min_sdu = softmac->smac_min_sdu; 896 macp->m_max_sdu = softmac->smac_max_sdu; 897 macp->m_callbacks = &softmac_m_callbacks; 898 macp->m_instance = (uint_t)-1; 899 900 err = mac_register(macp, &softmac->smac_mh); 901 mac_free(macp); 902 if (err != 0) { 903 cmn_err(CE_WARN, "mac_register failed for %s", 904 softmac->smac_devname); 905 goto done; 906 } 907 } 908 mutex_exit(&softmac->smac_mutex); 909 910 /* 911 * Try to create the datalink for this softmac. 912 */ 913 if ((err = softmac_create_datalink(softmac)) != 0) { 914 if (!(softmac->smac_flags & SOFTMAC_NOSUPP)) 915 (void) mac_unregister(softmac->smac_mh); 916 mutex_enter(&softmac->smac_mutex); 917 softmac->smac_mh = NULL; 918 goto done; 919 } 920 /* 921 * If succeed, create the thread which handles the DL_NOTIFY_IND from 922 * the lower stream. 923 */ 924 mutex_enter(&softmac->smac_mutex); 925 if (softmac->smac_mh != NULL) { 926 softmac->smac_notify_thread = thread_create(NULL, 0, 927 softmac_notify_thread, softmac, 0, &p0, 928 TS_RUN, minclsyspri); 929 } 930 931done: 932 ASSERT(softmac->smac_state == SOFTMAC_ATTACH_INPROG && 933 softmac->smac_attachok_cnt == softmac->smac_cnt); 934 softmac->smac_state = SOFTMAC_ATTACH_DONE; 935 softmac->smac_attacherr = err; 936 cv_broadcast(&softmac->smac_cv); 937 mutex_exit(&softmac->smac_mutex); 938} 939 940int 941softmac_destroy(dev_info_t *dip, dev_t dev) 942{ 943 char devname[MAXNAMELEN]; 944 softmac_t *softmac; 945 softmac_dev_t *softmac_dev; 946 int index; 947 int ppa, err; 948 datalink_id_t linkid; 949 mac_handle_t smac_mh; 950 uint32_t smac_flags; 951 952 if (GLDV3_DRV(ddi_driver_major(dip))) { 953 minor_t minor = getminor(dev); 954 /* 955 * For an explanation of this logic, see the 956 * equivalent code in softmac_create. 957 */ 958 if ((strcmp(ddi_driver_name(dip), "clone") == 0) || 959 (getmajor(dev) == ddi_name_to_major("clone")) || 960 (minor == 0)) { 961 return (0); 962 } 963 if (minor >= DLS_MAX_MINOR) { 964 return (ENOTSUP); 965 } 966 ppa = DLS_MINOR2INST(minor); 967 } else { 968 ppa = ddi_get_instance(dip); 969 } 970 971 (void) snprintf(devname, MAXNAMELEN, "%s%d", ddi_driver_name(dip), ppa); 972 973 /* 974 * We are called only from the predetach entry point. The DACF 975 * framework ensures there can't be a concurrent postattach call 976 * for the same softmac. The softmac found out from the modhash 977 * below can't vanish beneath us since this is the only place where 978 * it is deleted. 979 */ 980 err = mod_hash_find(softmac_hash, (mod_hash_key_t)devname, 981 (mod_hash_val_t *)&softmac); 982 ASSERT(err == 0); 983 984 mutex_enter(&softmac->smac_mutex); 985 SOFTMAC_STATE_VERIFY(softmac); 986 987 /* 988 * Fail the predetach routine if this softmac is in-use. 989 * Make sure these downcalls into softmac_create or softmac_destroy 990 * don't cv_wait on any devfs related condition. Thus softmac_destroy 991 * returns EBUSY if the asynchronous thread started in softmac_create 992 * hasn't finished 993 */ 994 if ((softmac->smac_hold_cnt != 0) || 995 (softmac->smac_state == SOFTMAC_ATTACH_INPROG)) { 996 softmac->smac_attached_left = softmac->smac_attachok_cnt; 997 mutex_exit(&softmac->smac_mutex); 998 return (EBUSY); 999 } 1000 1001 /* 1002 * Even if the predetach of one minor node has already failed 1003 * (smac_attached_left is not 0), the DACF framework will continue 1004 * to call the predetach routines of the other minor nodes, 1005 * so we fail these calls here. 1006 */ 1007 if (softmac->smac_attached_left != 0) { 1008 mutex_exit(&softmac->smac_mutex); 1009 return (EBUSY); 1010 } 1011 1012 smac_mh = softmac->smac_mh; 1013 smac_flags = softmac->smac_flags; 1014 softmac->smac_state = SOFTMAC_DETACH_INPROG; 1015 mutex_exit(&softmac->smac_mutex); 1016 1017 if (smac_mh != NULL) { 1018 /* 1019 * This is the first minor node that is being detached for this 1020 * softmac. 1021 */ 1022 ASSERT(softmac->smac_attachok_cnt == softmac->smac_cnt); 1023 if (!(smac_flags & SOFTMAC_NOSUPP)) { 1024 if ((err = dls_devnet_destroy(smac_mh, &linkid, 1025 B_FALSE)) != 0) { 1026 goto error; 1027 } 1028 } 1029 /* 1030 * If softmac_mac_register() succeeds in registering the mac 1031 * of the legacy device, unregister it. 1032 */ 1033 if (!(smac_flags & (SOFTMAC_GLDV3 | SOFTMAC_NOSUPP))) { 1034 if ((err = mac_disable_nowait(smac_mh)) != 0) { 1035 (void) dls_devnet_create(smac_mh, linkid, 1036 crgetzoneid(CRED())); 1037 goto error; 1038 } 1039 /* 1040 * Ask softmac_notify_thread to quit, and wait for 1041 * that to be done. 1042 */ 1043 mutex_enter(&softmac->smac_mutex); 1044 softmac->smac_flags |= SOFTMAC_NOTIFY_QUIT; 1045 cv_broadcast(&softmac->smac_cv); 1046 while (softmac->smac_notify_thread != NULL) { 1047 cv_wait(&softmac->smac_cv, 1048 &softmac->smac_mutex); 1049 } 1050 mutex_exit(&softmac->smac_mutex); 1051 VERIFY(mac_unregister(smac_mh) == 0); 1052 } 1053 softmac->smac_mh = NULL; 1054 } 1055 1056 /* 1057 * Free softmac_dev 1058 */ 1059 rw_enter(&softmac_hash_lock, RW_WRITER); 1060 mutex_enter(&softmac->smac_mutex); 1061 1062 ASSERT(softmac->smac_state == SOFTMAC_DETACH_INPROG && 1063 softmac->smac_attachok_cnt != 0); 1064 softmac->smac_mh = NULL; 1065 index = (getmajor(dev) == ddi_name_to_major("clone")); 1066 softmac_dev = softmac->smac_softmac[index]; 1067 ASSERT(softmac_dev != NULL); 1068 softmac->smac_softmac[index] = NULL; 1069 kmem_free(softmac_dev, sizeof (softmac_dev_t)); 1070 1071 if (--softmac->smac_attachok_cnt == 0) { 1072 mod_hash_val_t hashval; 1073 1074 softmac->smac_state = SOFTMAC_UNINIT; 1075 if (softmac->smac_hold_cnt != 0) { 1076 /* 1077 * Someone did a softmac_hold_device while we dropped 1078 * the locks. Leave the softmac itself intact which 1079 * will be reused by the reattach 1080 */ 1081 mutex_exit(&softmac->smac_mutex); 1082 rw_exit(&softmac_hash_lock); 1083 return (0); 1084 } 1085 err = mod_hash_remove(softmac_hash, 1086 (mod_hash_key_t)devname, 1087 (mod_hash_val_t *)&hashval); 1088 ASSERT(err == 0); 1089 1090 mutex_exit(&softmac->smac_mutex); 1091 rw_exit(&softmac_hash_lock); 1092 ASSERT(softmac->smac_fp_disable_clients == 0); 1093 softmac->smac_fastpath_admin_disabled = B_FALSE; 1094 kmem_cache_free(softmac_cachep, softmac); 1095 return (0); 1096 } 1097 mutex_exit(&softmac->smac_mutex); 1098 rw_exit(&softmac_hash_lock); 1099 return (0); 1100 1101error: 1102 mutex_enter(&softmac->smac_mutex); 1103 softmac->smac_attached_left = softmac->smac_attachok_cnt; 1104 softmac->smac_state = SOFTMAC_ATTACH_DONE; 1105 cv_broadcast(&softmac->smac_cv); 1106 mutex_exit(&softmac->smac_mutex); 1107 return (err); 1108} 1109 1110/* 1111 * This function is called as the result of a newly started dlmgmtd daemon. 1112 * 1113 * We walk through every softmac that was created but failed to notify 1114 * dlmgmtd about it (whose SOFTMAC_NEED_RECREATE flag is set). This occurs 1115 * when softmacs are created before dlmgmtd is ready. For example, during 1116 * diskless boot, a network device is used (and therefore attached) before 1117 * the datalink-management service starts dlmgmtd. 1118 */ 1119/* ARGSUSED */ 1120static uint_t 1121softmac_mac_recreate(mod_hash_key_t key, mod_hash_val_t *val, void *arg) 1122{ 1123 softmac_t *softmac = (softmac_t *)val; 1124 datalink_id_t linkid; 1125 int err; 1126 softmac_walk_t *smwp = arg; 1127 1128 /* 1129 * The framework itself must not hold any locks across calls to the 1130 * mac perimeter. Thus this function does not call any framework 1131 * function that needs to grab the mac perimeter. 1132 */ 1133 ASSERT(RW_READ_HELD(&softmac_hash_lock)); 1134 1135 smwp->smw_retry = B_FALSE; 1136 mutex_enter(&softmac->smac_mutex); 1137 SOFTMAC_STATE_VERIFY(softmac); 1138 if (softmac->smac_state == SOFTMAC_ATTACH_INPROG) { 1139 /* 1140 * Wait till softmac_create or softmac_mac_register finishes 1141 * Hold the softmac to ensure it stays around. The wait itself 1142 * is done in the caller, since we need to drop all locks 1143 * including the mod hash's internal lock before calling 1144 * cv_wait. 1145 */ 1146 smwp->smw_retry = B_TRUE; 1147 smwp->smw_softmac = softmac; 1148 softmac->smac_hold_cnt++; 1149 return (MH_WALK_TERMINATE); 1150 } 1151 1152 if ((softmac->smac_state != SOFTMAC_ATTACH_DONE) || 1153 !(softmac->smac_flags & SOFTMAC_NEED_RECREATE)) { 1154 mutex_exit(&softmac->smac_mutex); 1155 return (MH_WALK_CONTINUE); 1156 } 1157 1158 /* 1159 * Bumping up the smac_hold_cnt allows us to drop the lock. It also 1160 * makes softmac_destroy() return failure on an attempted device detach. 1161 * We don't want to hold the lock across calls to other subsystems 1162 * like kstats, which will happen in the call to dls_devnet_recreate 1163 */ 1164 softmac->smac_hold_cnt++; 1165 mutex_exit(&softmac->smac_mutex); 1166 1167 if (dls_mgmt_create(softmac->smac_devname, 1168 makedevice(softmac->smac_umajor, softmac->smac_uppa + 1), 1169 DATALINK_CLASS_PHYS, softmac->smac_media, B_TRUE, &linkid) != 0) { 1170 softmac_rele_device((dls_dev_handle_t)softmac); 1171 return (MH_WALK_CONTINUE); 1172 } 1173 1174 if ((err = softmac_update_info(softmac, &linkid)) != 0) { 1175 cmn_err(CE_WARN, "softmac: softmac_update_info() for %s " 1176 "failed (%d)", softmac->smac_devname, err); 1177 softmac_rele_device((dls_dev_handle_t)softmac); 1178 return (MH_WALK_CONTINUE); 1179 } 1180 1181 /* 1182 * Create a link for this MAC. The link name will be the same 1183 * as the MAC name. 1184 */ 1185 if (!(softmac->smac_flags & SOFTMAC_NOSUPP)) { 1186 err = dls_devnet_recreate(softmac->smac_mh, linkid); 1187 if (err != 0) { 1188 cmn_err(CE_WARN, "softmac: dls_devnet_recreate() for " 1189 "%s (linkid %d) failed (%d)", 1190 softmac->smac_devname, linkid, err); 1191 } 1192 } 1193 1194 mutex_enter(&softmac->smac_mutex); 1195 softmac->smac_flags &= ~SOFTMAC_NEED_RECREATE; 1196 ASSERT(softmac->smac_hold_cnt != 0); 1197 softmac->smac_hold_cnt--; 1198 mutex_exit(&softmac->smac_mutex); 1199 1200 return (MH_WALK_CONTINUE); 1201} 1202 1203/* 1204 * See comments above softmac_mac_recreate(). 1205 */ 1206void 1207softmac_recreate() 1208{ 1209 softmac_walk_t smw; 1210 softmac_t *softmac; 1211 1212 /* 1213 * Walk through the softmac_hash table. Request to create the 1214 * [link name, linkid] mapping if we failed to do so. 1215 */ 1216 do { 1217 smw.smw_retry = B_FALSE; 1218 rw_enter(&softmac_hash_lock, RW_READER); 1219 mod_hash_walk(softmac_hash, softmac_mac_recreate, &smw); 1220 rw_exit(&softmac_hash_lock); 1221 if (smw.smw_retry) { 1222 /* 1223 * softmac_create or softmac_mac_register hasn't yet 1224 * finished and the softmac is not yet in the 1225 * SOFTMAC_ATTACH_DONE state. 1226 */ 1227 softmac = smw.smw_softmac; 1228 cv_wait(&softmac->smac_cv, &softmac->smac_mutex); 1229 softmac->smac_hold_cnt--; 1230 mutex_exit(&softmac->smac_mutex); 1231 } 1232 } while (smw.smw_retry); 1233} 1234 1235static int 1236softmac_m_start(void *arg) 1237{ 1238 softmac_t *softmac = arg; 1239 softmac_lower_t *slp = softmac->smac_lower; 1240 int err; 1241 1242 ASSERT(MAC_PERIM_HELD(softmac->smac_mh)); 1243 /* 1244 * Bind to SAP 2 on token ring, 0 on other interface types. 1245 * (SAP 0 has special significance on token ring). 1246 * Note that the receive-side packets could come anytime after bind. 1247 */ 1248 err = softmac_send_bind_req(slp, softmac->smac_media == DL_TPR ? 2 : 0); 1249 if (err != 0) 1250 return (err); 1251 1252 /* 1253 * Put the lower stream to the DL_PROMISC_SAP mode in order to receive 1254 * all packets of interest. 1255 * 1256 * some driver (e.g. the old legacy eri driver) incorrectly passes up 1257 * packets to DL_PROMISC_SAP stream when the lower stream is not bound, 1258 * so that we send DL_PROMISON_REQ after DL_BIND_REQ. 1259 */ 1260 err = softmac_send_promisc_req(slp, DL_PROMISC_SAP, B_TRUE); 1261 if (err != 0) { 1262 (void) softmac_send_unbind_req(slp); 1263 return (err); 1264 } 1265 1266 /* 1267 * Enable capabilities the underlying driver claims to support. 1268 * Some driver requires this being called after the stream is bound. 1269 */ 1270 if ((err = softmac_capab_enable(slp)) != 0) { 1271 (void) softmac_send_promisc_req(slp, DL_PROMISC_SAP, B_FALSE); 1272 (void) softmac_send_unbind_req(slp); 1273 } 1274 1275 return (err); 1276} 1277 1278/* ARGSUSED */ 1279static void 1280softmac_m_stop(void *arg) 1281{ 1282 softmac_t *softmac = arg; 1283 softmac_lower_t *slp = softmac->smac_lower; 1284 1285 ASSERT(MAC_PERIM_HELD(softmac->smac_mh)); 1286 1287 /* 1288 * It is not needed to reset zerocopy, MDT or HCKSUM capabilities. 1289 */ 1290 (void) softmac_send_promisc_req(slp, DL_PROMISC_SAP, B_FALSE); 1291 (void) softmac_send_unbind_req(slp); 1292} 1293 1294/* 1295 * Set up the lower stream above the legacy device. There are two different 1296 * type of lower streams: 1297 * 1298 * - Shared lower-stream 1299 * 1300 * Shared by all GLDv3 MAC clients. Put the lower stream to the DLIOCRAW 1301 * mode to send and receive the raw data. Further, put the lower stream into 1302 * DL_PROMISC_SAP mode to receive all packets of interest. 1303 * 1304 * - Dedicated lower-stream 1305 * 1306 * The lower-stream which is dedicated to upper IP/ARP stream. This is used 1307 * as fast-path for IP. In this case, the second argument is the pointer to 1308 * the softmac upper-stream. 1309 */ 1310int 1311softmac_lower_setup(softmac_t *softmac, softmac_upper_t *sup, 1312 softmac_lower_t **slpp) 1313{ 1314 ldi_ident_t li; 1315 dev_t dev; 1316 ldi_handle_t lh = NULL; 1317 softmac_lower_t *slp = NULL; 1318 smac_ioc_start_t start_arg; 1319 struct strioctl strioc; 1320 uint32_t notifications; 1321 int err, rval; 1322 1323 if ((err = ldi_ident_from_dip(softmac_dip, &li)) != 0) 1324 return (err); 1325 1326 /* 1327 * The GLDv3 framework makes sure that mac_unregister(), mac_open(), 1328 * and mac_close() cannot be called at the same time. So we don't 1329 * need any protection to access softmac here. 1330 */ 1331 dev = softmac->smac_dev; 1332 1333 err = ldi_open_by_dev(&dev, OTYP_CHR, FREAD|FWRITE, kcred, &lh, li); 1334 ldi_ident_release(li); 1335 if (err != 0) 1336 goto done; 1337 1338 /* 1339 * Pop all the intermediate modules. The autopushed modules will 1340 * be pushed when the softmac node is opened. 1341 */ 1342 while (ldi_ioctl(lh, I_POP, 0, FKIOCTL, kcred, &rval) == 0) 1343 ; 1344 1345 if ((softmac->smac_style == DL_STYLE2) && 1346 ((err = dl_attach(lh, softmac->smac_uppa, NULL)) != 0)) { 1347 goto done; 1348 } 1349 1350 /* 1351 * If this is the shared-lower-stream, put the lower stream to 1352 * the DLIOCRAW mode to send/receive raw data. 1353 */ 1354 if ((sup == NULL) && (err = ldi_ioctl(lh, DLIOCRAW, 0, FKIOCTL, 1355 kcred, &rval)) != 0) { 1356 goto done; 1357 } 1358 1359 /* 1360 * Then push the softmac shim layer atop the lower stream. 1361 */ 1362 if ((err = ldi_ioctl(lh, I_PUSH, (intptr_t)SOFTMAC_DEV_NAME, FKIOCTL, 1363 kcred, &rval)) != 0) { 1364 goto done; 1365 } 1366 1367 /* 1368 * Send the ioctl to get the slp pointer. 1369 */ 1370 strioc.ic_cmd = SMAC_IOC_START; 1371 strioc.ic_timout = INFTIM; 1372 strioc.ic_len = sizeof (start_arg); 1373 strioc.ic_dp = (char *)&start_arg; 1374 1375 if ((err = ldi_ioctl(lh, I_STR, (intptr_t)&strioc, FKIOCTL, 1376 kcred, &rval)) != 0) { 1377 goto done; 1378 } 1379 slp = start_arg.si_slp; 1380 slp->sl_sup = sup; 1381 slp->sl_lh = lh; 1382 slp->sl_softmac = softmac; 1383 *slpp = slp; 1384 1385 if (sup != NULL) { 1386 slp->sl_rxinfo = &sup->su_rxinfo; 1387 } else { 1388 /* 1389 * Send DL_NOTIFY_REQ to enable certain DL_NOTIFY_IND. 1390 * We don't have to wait for the ack. 1391 */ 1392 notifications = DL_NOTE_PHYS_ADDR | DL_NOTE_LINK_UP | 1393 DL_NOTE_LINK_DOWN | DL_NOTE_PROMISC_ON_PHYS | 1394 DL_NOTE_PROMISC_OFF_PHYS; 1395 1396 (void) softmac_send_notify_req(slp, 1397 (notifications & softmac->smac_notifications)); 1398 } 1399 1400done: 1401 if (err != 0) 1402 (void) ldi_close(lh, FREAD|FWRITE, kcred); 1403 return (err); 1404} 1405 1406static int 1407softmac_m_open(void *arg) 1408{ 1409 softmac_t *softmac = arg; 1410 softmac_lower_t *slp; 1411 int err; 1412 1413 ASSERT(MAC_PERIM_HELD(softmac->smac_mh)); 1414 1415 if ((err = softmac_lower_setup(softmac, NULL, &slp)) != 0) 1416 return (err); 1417 1418 softmac->smac_lower = slp; 1419 return (0); 1420} 1421 1422static void 1423softmac_m_close(void *arg) 1424{ 1425 softmac_t *softmac = arg; 1426 softmac_lower_t *slp; 1427 1428 ASSERT(MAC_PERIM_HELD(softmac->smac_mh)); 1429 slp = softmac->smac_lower; 1430 ASSERT(slp != NULL); 1431 1432 /* 1433 * Note that slp is destroyed when lh is closed. 1434 */ 1435 (void) ldi_close(slp->sl_lh, FREAD|FWRITE, kcred); 1436 softmac->smac_lower = NULL; 1437} 1438 1439/* 1440 * Softmac supports two priviate link properteis: 1441 * 1442 * - "_fastpath" 1443 * 1444 * This is a read-only link property which points out the current data-path 1445 * model of the given legacy link. The possible values are "disabled" and 1446 * "enabled". 1447 * 1448 * - "_disable_fastpath" 1449 * 1450 * This is a read-write link property which can be used to disable or enable 1451 * the fast-path of the given legacy link. The possible values are "true" 1452 * and "false". Note that even when "_disable_fastpath" is set to be 1453 * "false", the fast-path may still not be enabled since there may be 1454 * other mac cleints that request the fast-path to be disabled. 1455 */ 1456/* ARGSUSED */ 1457static int 1458softmac_m_setprop(void *arg, const char *name, mac_prop_id_t id, 1459 uint_t valsize, const void *val) 1460{ 1461 softmac_t *softmac = arg; 1462 1463 if (id != MAC_PROP_PRIVATE || strcmp(name, "_disable_fastpath") != 0) 1464 return (ENOTSUP); 1465 1466 if (strcmp(val, "true") == 0) 1467 return (softmac_datapath_switch(softmac, B_TRUE, B_TRUE)); 1468 else if (strcmp(val, "false") == 0) 1469 return (softmac_datapath_switch(softmac, B_FALSE, B_TRUE)); 1470 else 1471 return (EINVAL); 1472} 1473 1474static int 1475softmac_m_getprop(void *arg, const char *name, mac_prop_id_t id, 1476 uint_t valsize, void *val) 1477{ 1478 softmac_t *softmac = arg; 1479 char *fpstr; 1480 1481 if (id != MAC_PROP_PRIVATE) 1482 return (ENOTSUP); 1483 1484 if (strcmp(name, "_fastpath") == 0) { 1485 mutex_enter(&softmac->smac_fp_mutex); 1486 fpstr = (DATAPATH_MODE(softmac) == SOFTMAC_SLOWPATH) ? 1487 "disabled" : "enabled"; 1488 mutex_exit(&softmac->smac_fp_mutex); 1489 } else if (strcmp(name, "_disable_fastpath") == 0) { 1490 fpstr = softmac->smac_fastpath_admin_disabled ? 1491 "true" : "false"; 1492 } else if (strcmp(name, "_softmac") == 0) { 1493 fpstr = "true"; 1494 } else { 1495 return (ENOTSUP); 1496 } 1497 1498 return (strlcpy(val, fpstr, valsize) >= valsize ? EINVAL : 0); 1499} 1500 1501static void 1502softmac_m_propinfo(void *arg, const char *name, mac_prop_id_t id, 1503 mac_prop_info_handle_t prh) 1504{ 1505 _NOTE(ARGUNUSED(arg)); 1506 1507 if (id != MAC_PROP_PRIVATE) 1508 return; 1509 1510 if (strcmp(name, "_fastpath") == 0) { 1511 mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ); 1512 } else if (strcmp(name, "_disable_fastpath") == 0) { 1513 mac_prop_info_set_default_str(prh, "false"); 1514 } 1515 1516} 1517 1518int 1519softmac_hold_device(dev_t dev, dls_dev_handle_t *ddhp) 1520{ 1521 dev_info_t *dip; 1522 char devname[MAXNAMELEN]; 1523 softmac_t *softmac; 1524 major_t major; 1525 int ppa, err = 0, inst; 1526 1527 major = getmajor(dev); 1528 ppa = getminor(dev) - 1; 1529 1530 /* 1531 * For GLDv3 devices, look up the device instance using getinfo(9e). 1532 * Otherwise, fall back to the old assumption that inst == ppa. The 1533 * GLDV3_DRV() macro depends on the driver module being loaded, hence 1534 * the call to ddi_hold_driver(). 1535 */ 1536 if (ddi_hold_driver(major) == NULL) 1537 return (ENXIO); 1538 if (GLDV3_DRV(major)) { 1539 if ((inst = dev_to_instance(dev)) < 0) 1540 err = ENOENT; 1541 } else { 1542 inst = ppa; 1543 } 1544 ddi_rele_driver(major); 1545 if (err != 0) 1546 return (err); 1547 1548 /* 1549 * First try to hold this device instance to force device to attach 1550 * and ensure that the softmac entry gets created in net_postattach(). 1551 */ 1552 if ((dip = ddi_hold_devi_by_instance(major, inst, 0)) == NULL) 1553 return (ENOENT); 1554 1555 /* 1556 * Exclude non-physical network device instances, for example, aggr0. 1557 * Note: this check *must* occur after the dip is held, or else 1558 * NETWORK_PHYSDRV might return false incorrectly. The 1559 * DN_NETWORK_PHYSDRIVER flag used by NETWORK_PHYSDRV() gets set if 1560 * ddi_create_minor_node() is called during the device's attach 1561 * phase. 1562 */ 1563 if (!NETWORK_PHYSDRV(major)) { 1564 ddi_release_devi(dip); 1565 return (ENOENT); 1566 } 1567 1568 /* Now wait for its softmac to be created. */ 1569 (void) snprintf(devname, MAXNAMELEN, "%s%d", ddi_major_to_name(major), 1570 ppa); 1571again: 1572 rw_enter(&softmac_hash_lock, RW_READER); 1573 1574 if (mod_hash_find(softmac_hash, (mod_hash_key_t)devname, 1575 (mod_hash_val_t *)&softmac) != 0) { 1576 /* 1577 * This is rare but possible. It could happen when pre-detach 1578 * routine of the device succeeds. But the softmac will then 1579 * be recreated when device fails to detach (as this device 1580 * is held). 1581 */ 1582 mutex_enter(&smac_global_lock); 1583 rw_exit(&softmac_hash_lock); 1584 cv_wait(&smac_global_cv, &smac_global_lock); 1585 mutex_exit(&smac_global_lock); 1586 goto again; 1587 } 1588 1589 /* 1590 * Bump smac_hold_cnt to prevent device detach. 1591 */ 1592 mutex_enter(&softmac->smac_mutex); 1593 softmac->smac_hold_cnt++; 1594 rw_exit(&softmac_hash_lock); 1595 1596 /* 1597 * Wait till the device is fully attached. 1598 */ 1599 while (softmac->smac_state != SOFTMAC_ATTACH_DONE) 1600 cv_wait(&softmac->smac_cv, &softmac->smac_mutex); 1601 1602 SOFTMAC_STATE_VERIFY(softmac); 1603 1604 if ((err = softmac->smac_attacherr) != 0) 1605 softmac->smac_hold_cnt--; 1606 else 1607 *ddhp = (dls_dev_handle_t)softmac; 1608 mutex_exit(&softmac->smac_mutex); 1609 1610 ddi_release_devi(dip); 1611 return (err); 1612} 1613 1614void 1615softmac_rele_device(dls_dev_handle_t ddh) 1616{ 1617 if (ddh != NULL) 1618 softmac_rele((softmac_t *)ddh); 1619} 1620 1621int 1622softmac_hold(dev_t dev, softmac_t **softmacp) 1623{ 1624 softmac_t *softmac; 1625 char *drv; 1626 mac_handle_t mh; 1627 char mac[MAXNAMELEN]; 1628 int err; 1629 1630 if ((drv = ddi_major_to_name(getmajor(dev))) == NULL) 1631 return (EINVAL); 1632 1633 (void) snprintf(mac, MAXNAMELEN, "%s%d", drv, getminor(dev) - 1); 1634 if ((err = mac_open(mac, &mh)) != 0) 1635 return (err); 1636 1637 softmac = (softmac_t *)mac_driver(mh); 1638 1639 mutex_enter(&softmac->smac_mutex); 1640 softmac->smac_hold_cnt++; 1641 mutex_exit(&softmac->smac_mutex); 1642 mac_close(mh); 1643 *softmacp = softmac; 1644 return (0); 1645} 1646 1647void 1648softmac_rele(softmac_t *softmac) 1649{ 1650 mutex_enter(&softmac->smac_mutex); 1651 softmac->smac_hold_cnt--; 1652 mutex_exit(&softmac->smac_mutex); 1653} 1654