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 (c) 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2012, Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 /* 27 * Data-Link Driver 28 */ 29 #include <sys/sysmacros.h> 30 #include <sys/strsubr.h> 31 #include <sys/strsun.h> 32 #include <sys/vlan.h> 33 #include <sys/dld_impl.h> 34 #include <sys/mac_client.h> 35 #include <sys/mac_client_impl.h> 36 #include <sys/mac_client_priv.h> 37 38 typedef void proto_reqfunc_t(dld_str_t *, mblk_t *); 39 40 static proto_reqfunc_t proto_info_req, proto_attach_req, proto_detach_req, 41 proto_bind_req, proto_unbind_req, proto_promiscon_req, proto_promiscoff_req, 42 proto_enabmulti_req, proto_disabmulti_req, proto_physaddr_req, 43 proto_setphysaddr_req, proto_udqos_req, proto_req, proto_capability_req, 44 proto_notify_req, proto_passive_req; 45 46 static void proto_capability_advertise(dld_str_t *, mblk_t *); 47 static int dld_capab_poll_disable(dld_str_t *, dld_capab_poll_t *); 48 static boolean_t check_mod_above(queue_t *, const char *); 49 50 #define DL_ACK_PENDING(state) \ 51 ((state) == DL_ATTACH_PENDING || \ 52 (state) == DL_DETACH_PENDING || \ 53 (state) == DL_BIND_PENDING || \ 54 (state) == DL_UNBIND_PENDING) 55 56 /* 57 * Process a DLPI protocol message. 58 * The primitives DL_BIND_REQ, DL_ENABMULTI_REQ, DL_PROMISCON_REQ, 59 * DL_SET_PHYS_ADDR_REQ put the data link below our dld_str_t into an 60 * 'active' state. The primitive DL_PASSIVE_REQ marks our dld_str_t 61 * as 'passive' and forbids it from being subsequently made 'active' 62 * by the above primitives. 63 */ 64 void 65 dld_proto(dld_str_t *dsp, mblk_t *mp) 66 { 67 t_uscalar_t prim; 68 69 if (MBLKL(mp) < sizeof (t_uscalar_t)) { 70 freemsg(mp); 71 return; 72 } 73 prim = ((union DL_primitives *)mp->b_rptr)->dl_primitive; 74 75 switch (prim) { 76 case DL_INFO_REQ: 77 proto_info_req(dsp, mp); 78 break; 79 case DL_BIND_REQ: 80 proto_bind_req(dsp, mp); 81 break; 82 case DL_UNBIND_REQ: 83 proto_unbind_req(dsp, mp); 84 break; 85 case DL_UNITDATA_REQ: 86 proto_unitdata_req(dsp, mp); 87 break; 88 case DL_UDQOS_REQ: 89 proto_udqos_req(dsp, mp); 90 break; 91 case DL_ATTACH_REQ: 92 proto_attach_req(dsp, mp); 93 break; 94 case DL_DETACH_REQ: 95 proto_detach_req(dsp, mp); 96 break; 97 case DL_ENABMULTI_REQ: 98 proto_enabmulti_req(dsp, mp); 99 break; 100 case DL_DISABMULTI_REQ: 101 proto_disabmulti_req(dsp, mp); 102 break; 103 case DL_PROMISCON_REQ: 104 proto_promiscon_req(dsp, mp); 105 break; 106 case DL_PROMISCOFF_REQ: 107 proto_promiscoff_req(dsp, mp); 108 break; 109 case DL_PHYS_ADDR_REQ: 110 proto_physaddr_req(dsp, mp); 111 break; 112 case DL_SET_PHYS_ADDR_REQ: 113 proto_setphysaddr_req(dsp, mp); 114 break; 115 case DL_NOTIFY_REQ: 116 proto_notify_req(dsp, mp); 117 break; 118 case DL_CAPABILITY_REQ: 119 proto_capability_req(dsp, mp); 120 break; 121 case DL_PASSIVE_REQ: 122 proto_passive_req(dsp, mp); 123 break; 124 default: 125 proto_req(dsp, mp); 126 break; 127 } 128 } 129 130 #define NEG(x) -(x) 131 typedef struct dl_info_ack_wrapper { 132 dl_info_ack_t dl_info; 133 uint8_t dl_addr[MAXMACADDRLEN + sizeof (uint16_t)]; 134 uint8_t dl_brdcst_addr[MAXMACADDRLEN]; 135 dl_qos_cl_range1_t dl_qos_range1; 136 dl_qos_cl_sel1_t dl_qos_sel1; 137 } dl_info_ack_wrapper_t; 138 139 /* 140 * DL_INFO_REQ 141 */ 142 static void 143 proto_info_req(dld_str_t *dsp, mblk_t *mp) 144 { 145 dl_info_ack_wrapper_t *dlwp; 146 dl_info_ack_t *dlp; 147 dl_qos_cl_sel1_t *selp; 148 dl_qos_cl_range1_t *rangep; 149 uint8_t *addr; 150 uint8_t *brdcst_addr; 151 uint_t addr_length; 152 uint_t sap_length; 153 mac_info_t minfo; 154 mac_info_t *minfop; 155 queue_t *q = dsp->ds_wq; 156 157 /* 158 * Swap the request message for one large enough to contain the 159 * wrapper structure defined above. 160 */ 161 if ((mp = mexchange(q, mp, sizeof (dl_info_ack_wrapper_t), 162 M_PCPROTO, 0)) == NULL) 163 return; 164 165 bzero(mp->b_rptr, sizeof (dl_info_ack_wrapper_t)); 166 dlwp = (dl_info_ack_wrapper_t *)mp->b_rptr; 167 168 dlp = &(dlwp->dl_info); 169 ASSERT(dlp == (dl_info_ack_t *)mp->b_rptr); 170 171 dlp->dl_primitive = DL_INFO_ACK; 172 173 /* 174 * Set up the sub-structure pointers. 175 */ 176 addr = dlwp->dl_addr; 177 brdcst_addr = dlwp->dl_brdcst_addr; 178 rangep = &(dlwp->dl_qos_range1); 179 selp = &(dlwp->dl_qos_sel1); 180 181 /* 182 * This driver supports only version 2 connectionless DLPI provider 183 * nodes. 184 */ 185 dlp->dl_service_mode = DL_CLDLS; 186 dlp->dl_version = DL_VERSION_2; 187 188 /* 189 * Set the style of the provider 190 */ 191 dlp->dl_provider_style = dsp->ds_style; 192 ASSERT(dlp->dl_provider_style == DL_STYLE1 || 193 dlp->dl_provider_style == DL_STYLE2); 194 195 /* 196 * Set the current DLPI state. 197 */ 198 dlp->dl_current_state = dsp->ds_dlstate; 199 200 /* 201 * Gratuitously set the media type. This is to deal with modules 202 * that assume the media type is known prior to DL_ATTACH_REQ 203 * being completed. 204 */ 205 dlp->dl_mac_type = DL_ETHER; 206 207 /* 208 * If the stream is not at least attached we try to retrieve the 209 * mac_info using mac_info_get() 210 */ 211 if (dsp->ds_dlstate == DL_UNATTACHED || 212 dsp->ds_dlstate == DL_ATTACH_PENDING || 213 dsp->ds_dlstate == DL_DETACH_PENDING) { 214 if (!mac_info_get(ddi_major_to_name(dsp->ds_major), &minfo)) { 215 /* 216 * Cannot find mac_info. giving up. 217 */ 218 goto done; 219 } 220 minfop = &minfo; 221 } else { 222 minfop = (mac_info_t *)dsp->ds_mip; 223 /* We can only get the sdu if we're attached. */ 224 mac_sdu_get(dsp->ds_mh, &dlp->dl_min_sdu, &dlp->dl_max_sdu); 225 } 226 227 /* 228 * Set the media type (properly this time). 229 */ 230 if (dsp->ds_native) 231 dlp->dl_mac_type = minfop->mi_nativemedia; 232 else 233 dlp->dl_mac_type = minfop->mi_media; 234 235 /* 236 * Set the DLSAP length. We only support 16 bit values and they 237 * appear after the MAC address portion of DLSAP addresses. 238 */ 239 sap_length = sizeof (uint16_t); 240 dlp->dl_sap_length = NEG(sap_length); 241 242 addr_length = minfop->mi_addr_length; 243 244 /* 245 * Copy in the media broadcast address. 246 */ 247 if (minfop->mi_brdcst_addr != NULL) { 248 dlp->dl_brdcst_addr_offset = 249 (uintptr_t)brdcst_addr - (uintptr_t)dlp; 250 bcopy(minfop->mi_brdcst_addr, brdcst_addr, addr_length); 251 dlp->dl_brdcst_addr_length = addr_length; 252 } 253 254 /* Only VLAN links and links that have a normal tag mode support QOS. */ 255 if ((dsp->ds_mch != NULL && 256 mac_client_vid(dsp->ds_mch) != VLAN_ID_NONE) || 257 (dsp->ds_dlp != NULL && 258 dsp->ds_dlp->dl_tagmode == LINK_TAGMODE_NORMAL)) { 259 dlp->dl_qos_range_offset = (uintptr_t)rangep - (uintptr_t)dlp; 260 dlp->dl_qos_range_length = sizeof (dl_qos_cl_range1_t); 261 262 rangep->dl_qos_type = DL_QOS_CL_RANGE1; 263 rangep->dl_trans_delay.dl_target_value = DL_UNKNOWN; 264 rangep->dl_trans_delay.dl_accept_value = DL_UNKNOWN; 265 rangep->dl_protection.dl_min = DL_UNKNOWN; 266 rangep->dl_protection.dl_max = DL_UNKNOWN; 267 rangep->dl_residual_error = DL_UNKNOWN; 268 269 /* 270 * Specify the supported range of priorities. 271 */ 272 rangep->dl_priority.dl_min = 0; 273 rangep->dl_priority.dl_max = (1 << VLAN_PRI_SIZE) - 1; 274 275 dlp->dl_qos_offset = (uintptr_t)selp - (uintptr_t)dlp; 276 dlp->dl_qos_length = sizeof (dl_qos_cl_sel1_t); 277 278 selp->dl_qos_type = DL_QOS_CL_SEL1; 279 selp->dl_trans_delay = DL_UNKNOWN; 280 selp->dl_protection = DL_UNKNOWN; 281 selp->dl_residual_error = DL_UNKNOWN; 282 283 /* 284 * Specify the current priority (which can be changed by 285 * the DL_UDQOS_REQ primitive). 286 */ 287 selp->dl_priority = dsp->ds_pri; 288 } 289 290 dlp->dl_addr_length = addr_length + sizeof (uint16_t); 291 if (dsp->ds_dlstate == DL_IDLE) { 292 /* 293 * The stream is bound. Therefore we can formulate a valid 294 * DLSAP address. 295 */ 296 dlp->dl_addr_offset = (uintptr_t)addr - (uintptr_t)dlp; 297 if (addr_length > 0) 298 mac_unicast_primary_get(dsp->ds_mh, addr); 299 300 *(uint16_t *)(addr + addr_length) = dsp->ds_sap; 301 } 302 303 done: 304 IMPLY(dlp->dl_qos_offset != 0, dlp->dl_qos_length != 0); 305 IMPLY(dlp->dl_qos_range_offset != 0, 306 dlp->dl_qos_range_length != 0); 307 IMPLY(dlp->dl_addr_offset != 0, dlp->dl_addr_length != 0); 308 IMPLY(dlp->dl_brdcst_addr_offset != 0, 309 dlp->dl_brdcst_addr_length != 0); 310 311 qreply(q, mp); 312 } 313 314 /* 315 * DL_ATTACH_REQ 316 */ 317 static void 318 proto_attach_req(dld_str_t *dsp, mblk_t *mp) 319 { 320 dl_attach_req_t *dlp = (dl_attach_req_t *)mp->b_rptr; 321 int err = 0; 322 t_uscalar_t dl_err; 323 queue_t *q = dsp->ds_wq; 324 325 if (MBLKL(mp) < sizeof (dl_attach_req_t) || 326 dlp->dl_ppa < 0 || dsp->ds_style == DL_STYLE1) { 327 dl_err = DL_BADPRIM; 328 goto failed; 329 } 330 331 if (dsp->ds_dlstate != DL_UNATTACHED) { 332 dl_err = DL_OUTSTATE; 333 goto failed; 334 } 335 336 dsp->ds_dlstate = DL_ATTACH_PENDING; 337 338 err = dld_str_attach(dsp, dlp->dl_ppa); 339 if (err != 0) { 340 switch (err) { 341 case ENOENT: 342 dl_err = DL_BADPPA; 343 err = 0; 344 break; 345 default: 346 dl_err = DL_SYSERR; 347 break; 348 } 349 dsp->ds_dlstate = DL_UNATTACHED; 350 goto failed; 351 } 352 ASSERT(dsp->ds_dlstate == DL_UNBOUND); 353 dlokack(q, mp, DL_ATTACH_REQ); 354 return; 355 356 failed: 357 dlerrorack(q, mp, DL_ATTACH_REQ, dl_err, (t_uscalar_t)err); 358 } 359 360 /* 361 * DL_DETACH_REQ 362 */ 363 static void 364 proto_detach_req(dld_str_t *dsp, mblk_t *mp) 365 { 366 queue_t *q = dsp->ds_wq; 367 t_uscalar_t dl_err; 368 369 if (MBLKL(mp) < sizeof (dl_detach_req_t)) { 370 dl_err = DL_BADPRIM; 371 goto failed; 372 } 373 374 if (dsp->ds_dlstate != DL_UNBOUND) { 375 dl_err = DL_OUTSTATE; 376 goto failed; 377 } 378 379 if (dsp->ds_style == DL_STYLE1) { 380 dl_err = DL_BADPRIM; 381 goto failed; 382 } 383 384 ASSERT(dsp->ds_datathr_cnt == 0); 385 dsp->ds_dlstate = DL_DETACH_PENDING; 386 387 dld_str_detach(dsp); 388 dlokack(dsp->ds_wq, mp, DL_DETACH_REQ); 389 return; 390 391 failed: 392 dlerrorack(q, mp, DL_DETACH_REQ, dl_err, 0); 393 } 394 395 /* 396 * DL_BIND_REQ 397 */ 398 static void 399 proto_bind_req(dld_str_t *dsp, mblk_t *mp) 400 { 401 dl_bind_req_t *dlp = (dl_bind_req_t *)mp->b_rptr; 402 int err = 0; 403 uint8_t dlsap_addr[MAXMACADDRLEN + sizeof (uint16_t)]; 404 uint_t dlsap_addr_length; 405 t_uscalar_t dl_err; 406 t_scalar_t sap; 407 queue_t *q = dsp->ds_wq; 408 mac_perim_handle_t mph; 409 void *mdip; 410 int32_t intr_cpu; 411 412 if (MBLKL(mp) < sizeof (dl_bind_req_t)) { 413 dl_err = DL_BADPRIM; 414 goto failed; 415 } 416 417 if (dlp->dl_xidtest_flg != 0) { 418 dl_err = DL_NOAUTO; 419 goto failed; 420 } 421 422 if (dlp->dl_service_mode != DL_CLDLS) { 423 dl_err = DL_UNSUPPORTED; 424 goto failed; 425 } 426 427 if (dsp->ds_dlstate != DL_UNBOUND) { 428 dl_err = DL_OUTSTATE; 429 goto failed; 430 } 431 432 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 433 434 if ((err = dls_active_set(dsp)) != 0) { 435 dl_err = DL_SYSERR; 436 goto failed2; 437 } 438 439 dsp->ds_dlstate = DL_BIND_PENDING; 440 /* 441 * Set the receive callback. 442 */ 443 dls_rx_set(dsp, (dsp->ds_mode == DLD_RAW) ? 444 dld_str_rx_raw : dld_str_rx_unitdata, dsp); 445 446 /* 447 * Bind the channel such that it can receive packets. 448 */ 449 sap = dlp->dl_sap; 450 dsp->ds_nonip = !check_mod_above(dsp->ds_rq, "ip") && 451 !check_mod_above(dsp->ds_rq, "arp"); 452 453 err = dls_bind(dsp, sap); 454 if (err != 0) { 455 switch (err) { 456 case EINVAL: 457 dl_err = DL_BADADDR; 458 err = 0; 459 break; 460 default: 461 dl_err = DL_SYSERR; 462 break; 463 } 464 465 dsp->ds_dlstate = DL_UNBOUND; 466 dls_active_clear(dsp, B_FALSE); 467 goto failed2; 468 } 469 470 intr_cpu = mac_client_intr_cpu(dsp->ds_mch); 471 mdip = mac_get_devinfo(dsp->ds_mh); 472 mac_perim_exit(mph); 473 474 /* 475 * We do this after we get out of the perim to avoid deadlocks 476 * etc. since part of mac_client_retarget_intr is to walk the 477 * device tree in order to find and retarget the interrupts. 478 */ 479 if (intr_cpu != -1) 480 mac_client_set_intr_cpu(mdip, dsp->ds_mch, intr_cpu); 481 482 /* 483 * Copy in MAC address. 484 */ 485 dlsap_addr_length = dsp->ds_mip->mi_addr_length; 486 mac_unicast_primary_get(dsp->ds_mh, dlsap_addr); 487 488 /* 489 * Copy in the SAP. 490 */ 491 *(uint16_t *)(dlsap_addr + dlsap_addr_length) = sap; 492 dlsap_addr_length += sizeof (uint16_t); 493 494 dsp->ds_dlstate = DL_IDLE; 495 dlbindack(q, mp, sap, dlsap_addr, dlsap_addr_length, 0, 0); 496 return; 497 498 failed2: 499 mac_perim_exit(mph); 500 failed: 501 dlerrorack(q, mp, DL_BIND_REQ, dl_err, (t_uscalar_t)err); 502 } 503 504 /* 505 * DL_UNBIND_REQ 506 */ 507 static void 508 proto_unbind_req(dld_str_t *dsp, mblk_t *mp) 509 { 510 queue_t *q = dsp->ds_wq; 511 t_uscalar_t dl_err; 512 mac_perim_handle_t mph; 513 514 if (MBLKL(mp) < sizeof (dl_unbind_req_t)) { 515 dl_err = DL_BADPRIM; 516 goto failed; 517 } 518 519 if (dsp->ds_dlstate != DL_IDLE) { 520 dl_err = DL_OUTSTATE; 521 goto failed; 522 } 523 524 mutex_enter(&dsp->ds_lock); 525 while (dsp->ds_datathr_cnt != 0) 526 cv_wait(&dsp->ds_datathr_cv, &dsp->ds_lock); 527 528 dsp->ds_dlstate = DL_UNBIND_PENDING; 529 mutex_exit(&dsp->ds_lock); 530 531 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 532 /* 533 * Unbind the channel to stop packets being received. 534 */ 535 dls_unbind(dsp); 536 537 /* 538 * Disable polling mode, if it is enabled. 539 */ 540 (void) dld_capab_poll_disable(dsp, NULL); 541 542 /* 543 * Clear LSO flags. 544 */ 545 dsp->ds_lso = B_FALSE; 546 dsp->ds_lso_max = 0; 547 548 /* 549 * Clear the receive callback. 550 */ 551 dls_rx_set(dsp, NULL, NULL); 552 dsp->ds_direct = B_FALSE; 553 554 /* 555 * Set the mode back to the default (unitdata). 556 */ 557 dsp->ds_mode = DLD_UNITDATA; 558 dsp->ds_dlstate = DL_UNBOUND; 559 560 dls_active_clear(dsp, B_FALSE); 561 mac_perim_exit(mph); 562 dlokack(dsp->ds_wq, mp, DL_UNBIND_REQ); 563 return; 564 failed: 565 dlerrorack(q, mp, DL_UNBIND_REQ, dl_err, 0); 566 } 567 568 /* 569 * DL_PROMISCON_REQ 570 */ 571 static void 572 proto_promiscon_req(dld_str_t *dsp, mblk_t *mp) 573 { 574 dl_promiscon_req_t *dlp = (dl_promiscon_req_t *)mp->b_rptr; 575 int err = 0; 576 t_uscalar_t dl_err; 577 uint32_t new_flags, promisc_saved; 578 queue_t *q = dsp->ds_wq; 579 mac_perim_handle_t mph; 580 581 if (MBLKL(mp) < sizeof (dl_promiscon_req_t)) { 582 dl_err = DL_BADPRIM; 583 goto failed; 584 } 585 586 if (dsp->ds_dlstate == DL_UNATTACHED || 587 DL_ACK_PENDING(dsp->ds_dlstate)) { 588 dl_err = DL_OUTSTATE; 589 goto failed; 590 } 591 592 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 593 594 new_flags = promisc_saved = dsp->ds_promisc; 595 switch (dlp->dl_level) { 596 case DL_PROMISC_SAP: 597 new_flags |= DLS_PROMISC_SAP; 598 break; 599 600 case DL_PROMISC_MULTI: 601 new_flags |= DLS_PROMISC_MULTI; 602 break; 603 604 case DL_PROMISC_PHYS: 605 new_flags |= DLS_PROMISC_PHYS; 606 break; 607 608 default: 609 dl_err = DL_NOTSUPPORTED; 610 goto failed; 611 } 612 613 if ((promisc_saved == 0) && (err = dls_active_set(dsp)) != 0) { 614 ASSERT(dsp->ds_promisc == promisc_saved); 615 dl_err = DL_SYSERR; 616 goto failed2; 617 } 618 619 /* 620 * Adjust channel promiscuity. 621 */ 622 err = dls_promisc(dsp, new_flags); 623 624 if (err != 0) { 625 dl_err = DL_SYSERR; 626 dsp->ds_promisc = promisc_saved; 627 if (promisc_saved == 0) 628 dls_active_clear(dsp, B_FALSE); 629 goto failed2; 630 } 631 632 mac_perim_exit(mph); 633 634 dlokack(q, mp, DL_PROMISCON_REQ); 635 return; 636 637 failed2: 638 mac_perim_exit(mph); 639 failed: 640 dlerrorack(q, mp, DL_PROMISCON_REQ, dl_err, (t_uscalar_t)err); 641 } 642 643 /* 644 * DL_PROMISCOFF_REQ 645 */ 646 static void 647 proto_promiscoff_req(dld_str_t *dsp, mblk_t *mp) 648 { 649 dl_promiscoff_req_t *dlp = (dl_promiscoff_req_t *)mp->b_rptr; 650 int err = 0; 651 t_uscalar_t dl_err; 652 uint32_t new_flags; 653 queue_t *q = dsp->ds_wq; 654 mac_perim_handle_t mph; 655 656 if (MBLKL(mp) < sizeof (dl_promiscoff_req_t)) { 657 dl_err = DL_BADPRIM; 658 goto failed; 659 } 660 661 if (dsp->ds_dlstate == DL_UNATTACHED || 662 DL_ACK_PENDING(dsp->ds_dlstate)) { 663 dl_err = DL_OUTSTATE; 664 goto failed; 665 } 666 667 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 668 669 new_flags = dsp->ds_promisc; 670 switch (dlp->dl_level) { 671 case DL_PROMISC_SAP: 672 if (!(dsp->ds_promisc & DLS_PROMISC_SAP)) { 673 dl_err = DL_NOTENAB; 674 goto failed; 675 } 676 new_flags &= ~DLS_PROMISC_SAP; 677 break; 678 679 case DL_PROMISC_MULTI: 680 if (!(dsp->ds_promisc & DLS_PROMISC_MULTI)) { 681 dl_err = DL_NOTENAB; 682 goto failed; 683 } 684 new_flags &= ~DLS_PROMISC_MULTI; 685 break; 686 687 case DL_PROMISC_PHYS: 688 if (!(dsp->ds_promisc & DLS_PROMISC_PHYS)) { 689 dl_err = DL_NOTENAB; 690 goto failed; 691 } 692 new_flags &= ~DLS_PROMISC_PHYS; 693 break; 694 695 default: 696 dl_err = DL_NOTSUPPORTED; 697 goto failed; 698 } 699 700 /* 701 * Adjust channel promiscuity. 702 */ 703 err = dls_promisc(dsp, new_flags); 704 705 if (err != 0) { 706 mac_perim_exit(mph); 707 dl_err = DL_SYSERR; 708 goto failed; 709 } 710 711 ASSERT(dsp->ds_promisc == new_flags); 712 if (dsp->ds_promisc == 0) 713 dls_active_clear(dsp, B_FALSE); 714 715 mac_perim_exit(mph); 716 717 dlokack(q, mp, DL_PROMISCOFF_REQ); 718 return; 719 failed: 720 dlerrorack(q, mp, DL_PROMISCOFF_REQ, dl_err, (t_uscalar_t)err); 721 } 722 723 /* 724 * DL_ENABMULTI_REQ 725 */ 726 static void 727 proto_enabmulti_req(dld_str_t *dsp, mblk_t *mp) 728 { 729 dl_enabmulti_req_t *dlp = (dl_enabmulti_req_t *)mp->b_rptr; 730 int err = 0; 731 t_uscalar_t dl_err; 732 queue_t *q = dsp->ds_wq; 733 mac_perim_handle_t mph; 734 735 if (dsp->ds_dlstate == DL_UNATTACHED || 736 DL_ACK_PENDING(dsp->ds_dlstate)) { 737 dl_err = DL_OUTSTATE; 738 goto failed; 739 } 740 741 if (MBLKL(mp) < sizeof (dl_enabmulti_req_t) || 742 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 743 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 744 dl_err = DL_BADPRIM; 745 goto failed; 746 } 747 748 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 749 750 if ((dsp->ds_dmap == NULL) && (err = dls_active_set(dsp)) != 0) { 751 dl_err = DL_SYSERR; 752 goto failed2; 753 } 754 755 err = dls_multicst_add(dsp, mp->b_rptr + dlp->dl_addr_offset); 756 if (err != 0) { 757 switch (err) { 758 case EINVAL: 759 dl_err = DL_BADADDR; 760 err = 0; 761 break; 762 case ENOSPC: 763 dl_err = DL_TOOMANY; 764 err = 0; 765 break; 766 default: 767 dl_err = DL_SYSERR; 768 break; 769 } 770 if (dsp->ds_dmap == NULL) 771 dls_active_clear(dsp, B_FALSE); 772 goto failed2; 773 } 774 775 mac_perim_exit(mph); 776 777 dlokack(q, mp, DL_ENABMULTI_REQ); 778 return; 779 780 failed2: 781 mac_perim_exit(mph); 782 failed: 783 dlerrorack(q, mp, DL_ENABMULTI_REQ, dl_err, (t_uscalar_t)err); 784 } 785 786 /* 787 * DL_DISABMULTI_REQ 788 */ 789 static void 790 proto_disabmulti_req(dld_str_t *dsp, mblk_t *mp) 791 { 792 dl_disabmulti_req_t *dlp = (dl_disabmulti_req_t *)mp->b_rptr; 793 int err = 0; 794 t_uscalar_t dl_err; 795 queue_t *q = dsp->ds_wq; 796 mac_perim_handle_t mph; 797 798 if (dsp->ds_dlstate == DL_UNATTACHED || 799 DL_ACK_PENDING(dsp->ds_dlstate)) { 800 dl_err = DL_OUTSTATE; 801 goto failed; 802 } 803 804 if (MBLKL(mp) < sizeof (dl_disabmulti_req_t) || 805 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 806 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 807 dl_err = DL_BADPRIM; 808 goto failed; 809 } 810 811 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 812 err = dls_multicst_remove(dsp, mp->b_rptr + dlp->dl_addr_offset); 813 if ((err == 0) && (dsp->ds_dmap == NULL)) 814 dls_active_clear(dsp, B_FALSE); 815 mac_perim_exit(mph); 816 817 if (err != 0) { 818 switch (err) { 819 case EINVAL: 820 dl_err = DL_BADADDR; 821 err = 0; 822 break; 823 824 case ENOENT: 825 dl_err = DL_NOTENAB; 826 err = 0; 827 break; 828 829 default: 830 dl_err = DL_SYSERR; 831 break; 832 } 833 goto failed; 834 } 835 dlokack(q, mp, DL_DISABMULTI_REQ); 836 return; 837 failed: 838 dlerrorack(q, mp, DL_DISABMULTI_REQ, dl_err, (t_uscalar_t)err); 839 } 840 841 /* 842 * DL_PHYS_ADDR_REQ 843 */ 844 static void 845 proto_physaddr_req(dld_str_t *dsp, mblk_t *mp) 846 { 847 dl_phys_addr_req_t *dlp = (dl_phys_addr_req_t *)mp->b_rptr; 848 queue_t *q = dsp->ds_wq; 849 t_uscalar_t dl_err = 0; 850 char *addr = NULL; 851 uint_t addr_length; 852 853 if (MBLKL(mp) < sizeof (dl_phys_addr_req_t)) { 854 dl_err = DL_BADPRIM; 855 goto done; 856 } 857 858 if (dsp->ds_dlstate == DL_UNATTACHED || 859 DL_ACK_PENDING(dsp->ds_dlstate)) { 860 dl_err = DL_OUTSTATE; 861 goto done; 862 } 863 864 addr_length = dsp->ds_mip->mi_addr_length; 865 if (addr_length > 0) { 866 addr = kmem_alloc(addr_length, KM_SLEEP); 867 switch (dlp->dl_addr_type) { 868 case DL_CURR_PHYS_ADDR: 869 mac_unicast_primary_get(dsp->ds_mh, (uint8_t *)addr); 870 break; 871 case DL_FACT_PHYS_ADDR: 872 bcopy(dsp->ds_mip->mi_unicst_addr, addr, addr_length); 873 break; 874 case DL_CURR_DEST_ADDR: 875 if (!mac_dst_get(dsp->ds_mh, (uint8_t *)addr)) 876 dl_err = DL_NOTSUPPORTED; 877 break; 878 default: 879 dl_err = DL_UNSUPPORTED; 880 } 881 } 882 done: 883 if (dl_err == 0) 884 dlphysaddrack(q, mp, addr, (t_uscalar_t)addr_length); 885 else 886 dlerrorack(q, mp, DL_PHYS_ADDR_REQ, dl_err, 0); 887 if (addr != NULL) 888 kmem_free(addr, addr_length); 889 } 890 891 /* 892 * DL_SET_PHYS_ADDR_REQ 893 */ 894 static void 895 proto_setphysaddr_req(dld_str_t *dsp, mblk_t *mp) 896 { 897 dl_set_phys_addr_req_t *dlp = (dl_set_phys_addr_req_t *)mp->b_rptr; 898 int err = 0; 899 t_uscalar_t dl_err; 900 queue_t *q = dsp->ds_wq; 901 mac_perim_handle_t mph; 902 903 if (dsp->ds_dlstate == DL_UNATTACHED || 904 DL_ACK_PENDING(dsp->ds_dlstate)) { 905 dl_err = DL_OUTSTATE; 906 goto failed; 907 } 908 909 if (MBLKL(mp) < sizeof (dl_set_phys_addr_req_t) || 910 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 911 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 912 dl_err = DL_BADPRIM; 913 goto failed; 914 } 915 916 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 917 918 if ((err = dls_active_set(dsp)) != 0) { 919 dl_err = DL_SYSERR; 920 goto failed2; 921 } 922 923 /* 924 * If mac-nospoof is enabled and the link is owned by a 925 * non-global zone, changing the mac address is not allowed. 926 */ 927 if (dsp->ds_dlp->dl_zid != GLOBAL_ZONEID && 928 mac_protect_enabled(dsp->ds_mch, MPT_MACNOSPOOF)) { 929 dls_active_clear(dsp, B_FALSE); 930 err = EACCES; 931 goto failed2; 932 } 933 934 err = mac_unicast_primary_set(dsp->ds_mh, 935 mp->b_rptr + dlp->dl_addr_offset); 936 if (err != 0) { 937 switch (err) { 938 case EINVAL: 939 dl_err = DL_BADADDR; 940 err = 0; 941 break; 942 943 default: 944 dl_err = DL_SYSERR; 945 break; 946 } 947 dls_active_clear(dsp, B_FALSE); 948 goto failed2; 949 950 } 951 952 mac_perim_exit(mph); 953 954 dlokack(q, mp, DL_SET_PHYS_ADDR_REQ); 955 return; 956 957 failed2: 958 mac_perim_exit(mph); 959 failed: 960 dlerrorack(q, mp, DL_SET_PHYS_ADDR_REQ, dl_err, (t_uscalar_t)err); 961 } 962 963 /* 964 * DL_UDQOS_REQ 965 */ 966 static void 967 proto_udqos_req(dld_str_t *dsp, mblk_t *mp) 968 { 969 dl_udqos_req_t *dlp = (dl_udqos_req_t *)mp->b_rptr; 970 dl_qos_cl_sel1_t *selp; 971 int off, len; 972 t_uscalar_t dl_err; 973 queue_t *q = dsp->ds_wq; 974 975 off = dlp->dl_qos_offset; 976 len = dlp->dl_qos_length; 977 978 if (MBLKL(mp) < sizeof (dl_udqos_req_t) || !MBLKIN(mp, off, len)) { 979 dl_err = DL_BADPRIM; 980 goto failed; 981 } 982 983 selp = (dl_qos_cl_sel1_t *)(mp->b_rptr + off); 984 if (selp->dl_qos_type != DL_QOS_CL_SEL1) { 985 dl_err = DL_BADQOSTYPE; 986 goto failed; 987 } 988 989 if (selp->dl_priority > (1 << VLAN_PRI_SIZE) - 1 || 990 selp->dl_priority < 0) { 991 dl_err = DL_BADQOSPARAM; 992 goto failed; 993 } 994 995 dsp->ds_pri = selp->dl_priority; 996 dlokack(q, mp, DL_UDQOS_REQ); 997 return; 998 failed: 999 dlerrorack(q, mp, DL_UDQOS_REQ, dl_err, 0); 1000 } 1001 1002 static boolean_t 1003 check_mod_above(queue_t *q, const char *mod) 1004 { 1005 queue_t *next_q; 1006 boolean_t ret = B_TRUE; 1007 1008 claimstr(q); 1009 next_q = q->q_next; 1010 if (strcmp(next_q->q_qinfo->qi_minfo->mi_idname, mod) != 0) 1011 ret = B_FALSE; 1012 releasestr(q); 1013 return (ret); 1014 } 1015 1016 /* 1017 * DL_CAPABILITY_REQ 1018 */ 1019 static void 1020 proto_capability_req(dld_str_t *dsp, mblk_t *mp) 1021 { 1022 dl_capability_req_t *dlp = (dl_capability_req_t *)mp->b_rptr; 1023 dl_capability_sub_t *sp; 1024 size_t size, len; 1025 offset_t off, end; 1026 t_uscalar_t dl_err; 1027 queue_t *q = dsp->ds_wq; 1028 1029 if (MBLKL(mp) < sizeof (dl_capability_req_t)) { 1030 dl_err = DL_BADPRIM; 1031 goto failed; 1032 } 1033 1034 if (dsp->ds_dlstate == DL_UNATTACHED || 1035 DL_ACK_PENDING(dsp->ds_dlstate)) { 1036 dl_err = DL_OUTSTATE; 1037 goto failed; 1038 } 1039 1040 /* 1041 * This request is overloaded. If there are no requested capabilities 1042 * then we just want to acknowledge with all the capabilities we 1043 * support. Otherwise we enable the set of capabilities requested. 1044 */ 1045 if (dlp->dl_sub_length == 0) { 1046 proto_capability_advertise(dsp, mp); 1047 return; 1048 } 1049 1050 if (!MBLKIN(mp, dlp->dl_sub_offset, dlp->dl_sub_length)) { 1051 dl_err = DL_BADPRIM; 1052 goto failed; 1053 } 1054 1055 dlp->dl_primitive = DL_CAPABILITY_ACK; 1056 1057 off = dlp->dl_sub_offset; 1058 len = dlp->dl_sub_length; 1059 1060 /* 1061 * Walk the list of capabilities to be enabled. 1062 */ 1063 for (end = off + len; off < end; ) { 1064 sp = (dl_capability_sub_t *)(mp->b_rptr + off); 1065 size = sizeof (dl_capability_sub_t) + sp->dl_length; 1066 1067 if (off + size > end || 1068 !IS_P2ALIGNED(off, sizeof (uint32_t))) { 1069 dl_err = DL_BADPRIM; 1070 goto failed; 1071 } 1072 1073 switch (sp->dl_cap) { 1074 /* 1075 * TCP/IP checksum offload to hardware. 1076 */ 1077 case DL_CAPAB_HCKSUM: { 1078 dl_capab_hcksum_t *hcksump; 1079 dl_capab_hcksum_t hcksum; 1080 1081 hcksump = (dl_capab_hcksum_t *)&sp[1]; 1082 /* 1083 * Copy for alignment. 1084 */ 1085 bcopy(hcksump, &hcksum, sizeof (dl_capab_hcksum_t)); 1086 dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); 1087 bcopy(&hcksum, hcksump, sizeof (dl_capab_hcksum_t)); 1088 break; 1089 } 1090 1091 case DL_CAPAB_DLD: { 1092 dl_capab_dld_t *dldp; 1093 dl_capab_dld_t dld; 1094 1095 dldp = (dl_capab_dld_t *)&sp[1]; 1096 /* 1097 * Copy for alignment. 1098 */ 1099 bcopy(dldp, &dld, sizeof (dl_capab_dld_t)); 1100 dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); 1101 bcopy(&dld, dldp, sizeof (dl_capab_dld_t)); 1102 break; 1103 } 1104 default: 1105 break; 1106 } 1107 off += size; 1108 } 1109 qreply(q, mp); 1110 return; 1111 failed: 1112 dlerrorack(q, mp, DL_CAPABILITY_REQ, dl_err, 0); 1113 } 1114 1115 /* 1116 * DL_NOTIFY_REQ 1117 */ 1118 static void 1119 proto_notify_req(dld_str_t *dsp, mblk_t *mp) 1120 { 1121 dl_notify_req_t *dlp = (dl_notify_req_t *)mp->b_rptr; 1122 t_uscalar_t dl_err; 1123 queue_t *q = dsp->ds_wq; 1124 uint_t note = 1125 DL_NOTE_PROMISC_ON_PHYS | 1126 DL_NOTE_PROMISC_OFF_PHYS | 1127 DL_NOTE_PHYS_ADDR | 1128 DL_NOTE_LINK_UP | 1129 DL_NOTE_LINK_DOWN | 1130 DL_NOTE_CAPAB_RENEG | 1131 DL_NOTE_FASTPATH_FLUSH | 1132 DL_NOTE_SPEED | 1133 DL_NOTE_SDU_SIZE| 1134 DL_NOTE_SDU_SIZE2| 1135 DL_NOTE_ALLOWED_IPS; 1136 1137 if (MBLKL(mp) < sizeof (dl_notify_req_t)) { 1138 dl_err = DL_BADPRIM; 1139 goto failed; 1140 } 1141 1142 if (dsp->ds_dlstate == DL_UNATTACHED || 1143 DL_ACK_PENDING(dsp->ds_dlstate)) { 1144 dl_err = DL_OUTSTATE; 1145 goto failed; 1146 } 1147 1148 note &= ~(mac_no_notification(dsp->ds_mh)); 1149 1150 /* 1151 * Cache the notifications that are being enabled. 1152 */ 1153 dsp->ds_notifications = dlp->dl_notifications & note; 1154 /* 1155 * The ACK carries all notifications regardless of which set is 1156 * being enabled. 1157 */ 1158 dlnotifyack(q, mp, note); 1159 1160 /* 1161 * Generate DL_NOTIFY_IND messages for each enabled notification. 1162 */ 1163 if (dsp->ds_notifications != 0) { 1164 dld_str_notify_ind(dsp); 1165 } 1166 return; 1167 failed: 1168 dlerrorack(q, mp, DL_NOTIFY_REQ, dl_err, 0); 1169 } 1170 1171 /* 1172 * DL_UINTDATA_REQ 1173 */ 1174 void 1175 proto_unitdata_req(dld_str_t *dsp, mblk_t *mp) 1176 { 1177 queue_t *q = dsp->ds_wq; 1178 dl_unitdata_req_t *dlp = (dl_unitdata_req_t *)mp->b_rptr; 1179 off_t off; 1180 size_t len, size; 1181 const uint8_t *addr; 1182 uint16_t sap; 1183 uint_t addr_length; 1184 mblk_t *bp, *payload; 1185 uint32_t start, stuff, end, value, flags; 1186 t_uscalar_t dl_err; 1187 uint_t max_sdu; 1188 1189 if (MBLKL(mp) < sizeof (dl_unitdata_req_t) || mp->b_cont == NULL) { 1190 dlerrorack(q, mp, DL_UNITDATA_REQ, DL_BADPRIM, 0); 1191 return; 1192 } 1193 1194 mutex_enter(&dsp->ds_lock); 1195 if (dsp->ds_dlstate != DL_IDLE) { 1196 mutex_exit(&dsp->ds_lock); 1197 dlerrorack(q, mp, DL_UNITDATA_REQ, DL_OUTSTATE, 0); 1198 return; 1199 } 1200 DLD_DATATHR_INC(dsp); 1201 mutex_exit(&dsp->ds_lock); 1202 1203 addr_length = dsp->ds_mip->mi_addr_length; 1204 1205 off = dlp->dl_dest_addr_offset; 1206 len = dlp->dl_dest_addr_length; 1207 1208 if (!MBLKIN(mp, off, len) || !IS_P2ALIGNED(off, sizeof (uint16_t))) { 1209 dl_err = DL_BADPRIM; 1210 goto failed; 1211 } 1212 1213 if (len != addr_length + sizeof (uint16_t)) { 1214 dl_err = DL_BADADDR; 1215 goto failed; 1216 } 1217 1218 addr = mp->b_rptr + off; 1219 sap = *(uint16_t *)(mp->b_rptr + off + addr_length); 1220 1221 /* 1222 * Check the length of the packet and the block types. 1223 */ 1224 size = 0; 1225 payload = mp->b_cont; 1226 for (bp = payload; bp != NULL; bp = bp->b_cont) { 1227 if (DB_TYPE(bp) != M_DATA) 1228 goto baddata; 1229 1230 size += MBLKL(bp); 1231 } 1232 1233 mac_sdu_get(dsp->ds_mh, NULL, &max_sdu); 1234 if (size > max_sdu) 1235 goto baddata; 1236 1237 /* 1238 * Build a packet header. 1239 */ 1240 if ((bp = dls_header(dsp, addr, sap, dlp->dl_priority.dl_max, 1241 &payload)) == NULL) { 1242 dl_err = DL_BADADDR; 1243 goto failed; 1244 } 1245 1246 /* 1247 * We no longer need the M_PROTO header, so free it. 1248 */ 1249 freeb(mp); 1250 1251 /* 1252 * Transfer the checksum offload information if it is present. 1253 */ 1254 hcksum_retrieve(payload, NULL, NULL, &start, &stuff, &end, &value, 1255 &flags); 1256 (void) hcksum_assoc(bp, NULL, NULL, start, stuff, end, value, flags, 0); 1257 1258 /* 1259 * Link the payload onto the new header. 1260 */ 1261 ASSERT(bp->b_cont == NULL); 1262 bp->b_cont = payload; 1263 1264 /* 1265 * No lock can be held across modules and putnext()'s, 1266 * which can happen here with the call from DLD_TX(). 1267 */ 1268 if (DLD_TX(dsp, bp, 0, 0) != NULL) { 1269 /* flow-controlled */ 1270 DLD_SETQFULL(dsp); 1271 } 1272 DLD_DATATHR_DCR(dsp); 1273 return; 1274 1275 failed: 1276 dlerrorack(q, mp, DL_UNITDATA_REQ, dl_err, 0); 1277 DLD_DATATHR_DCR(dsp); 1278 return; 1279 1280 baddata: 1281 dluderrorind(q, mp, (void *)addr, len, DL_BADDATA, 0); 1282 DLD_DATATHR_DCR(dsp); 1283 } 1284 1285 /* 1286 * DL_PASSIVE_REQ 1287 */ 1288 static void 1289 proto_passive_req(dld_str_t *dsp, mblk_t *mp) 1290 { 1291 t_uscalar_t dl_err; 1292 1293 /* 1294 * If we've already become active by issuing an active primitive, 1295 * then it's too late to try to become passive. 1296 */ 1297 if (dsp->ds_passivestate == DLD_ACTIVE) { 1298 dl_err = DL_OUTSTATE; 1299 goto failed; 1300 } 1301 1302 if (MBLKL(mp) < sizeof (dl_passive_req_t)) { 1303 dl_err = DL_BADPRIM; 1304 goto failed; 1305 } 1306 1307 dsp->ds_passivestate = DLD_PASSIVE; 1308 dlokack(dsp->ds_wq, mp, DL_PASSIVE_REQ); 1309 return; 1310 failed: 1311 dlerrorack(dsp->ds_wq, mp, DL_PASSIVE_REQ, dl_err, 0); 1312 } 1313 1314 1315 /* 1316 * Catch-all handler. 1317 */ 1318 static void 1319 proto_req(dld_str_t *dsp, mblk_t *mp) 1320 { 1321 union DL_primitives *dlp = (union DL_primitives *)mp->b_rptr; 1322 1323 dlerrorack(dsp->ds_wq, mp, dlp->dl_primitive, DL_UNSUPPORTED, 0); 1324 } 1325 1326 static int 1327 dld_capab_perim(dld_str_t *dsp, void *data, uint_t flags) 1328 { 1329 switch (flags) { 1330 case DLD_ENABLE: 1331 mac_perim_enter_by_mh(dsp->ds_mh, (mac_perim_handle_t *)data); 1332 return (0); 1333 1334 case DLD_DISABLE: 1335 mac_perim_exit((mac_perim_handle_t)data); 1336 return (0); 1337 1338 case DLD_QUERY: 1339 return (mac_perim_held(dsp->ds_mh)); 1340 } 1341 return (0); 1342 } 1343 1344 static int 1345 dld_capab_direct(dld_str_t *dsp, void *data, uint_t flags) 1346 { 1347 dld_capab_direct_t *direct = data; 1348 1349 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1350 1351 switch (flags) { 1352 case DLD_ENABLE: 1353 dls_rx_set(dsp, (dls_rx_t)direct->di_rx_cf, 1354 direct->di_rx_ch); 1355 1356 direct->di_tx_df = (uintptr_t)str_mdata_fastpath_put; 1357 direct->di_tx_dh = dsp; 1358 direct->di_tx_cb_df = (uintptr_t)mac_client_tx_notify; 1359 direct->di_tx_cb_dh = dsp->ds_mch; 1360 direct->di_tx_fctl_df = (uintptr_t)mac_tx_is_flow_blocked; 1361 direct->di_tx_fctl_dh = dsp->ds_mch; 1362 1363 dsp->ds_direct = B_TRUE; 1364 1365 return (0); 1366 1367 case DLD_DISABLE: 1368 dls_rx_set(dsp, (dsp->ds_mode == DLD_FASTPATH) ? 1369 dld_str_rx_fastpath : dld_str_rx_unitdata, (void *)dsp); 1370 dsp->ds_direct = B_FALSE; 1371 1372 return (0); 1373 } 1374 return (ENOTSUP); 1375 } 1376 1377 /* 1378 * dld_capab_poll_enable() 1379 * 1380 * This function is misnamed. All polling and fanouts are run out of the 1381 * lower mac (in case of VNIC and the only mac in case of NICs). The 1382 * availability of Rx ring and promiscous mode is all taken care between 1383 * the soft ring set (mac_srs), the Rx ring, and S/W classifier. Any 1384 * fanout necessary is done by the soft rings that are part of the 1385 * mac_srs (by default mac_srs sends the packets up via a TCP and 1386 * non TCP soft ring). 1387 * 1388 * The mac_srs (or its associated soft rings) always store the ill_rx_ring 1389 * (the cookie returned when they registered with IP during plumb) as their 1390 * 2nd argument which is passed up as mac_resource_handle_t. The upcall 1391 * function and 1st argument is what the caller registered when they 1392 * called mac_rx_classify_flow_add() to register the flow. For VNIC, 1393 * the function is vnic_rx and argument is vnic_t. For regular NIC 1394 * case, it mac_rx_default and mac_handle_t. As explained above, the 1395 * mac_srs (or its soft ring) will add the ill_rx_ring (mac_resource_handle_t) 1396 * from its stored 2nd argument. 1397 */ 1398 static int 1399 dld_capab_poll_enable(dld_str_t *dsp, dld_capab_poll_t *poll) 1400 { 1401 if (dsp->ds_polling) 1402 return (EINVAL); 1403 1404 if ((dld_opt & DLD_OPT_NO_POLL) != 0 || dsp->ds_mode == DLD_RAW) 1405 return (ENOTSUP); 1406 1407 /* 1408 * Enable client polling if and only if DLS bypass is possible. 1409 * Special cases like VLANs need DLS processing in the Rx data path. 1410 * In such a case we can neither allow the client (IP) to directly 1411 * poll the softring (since DLS processing hasn't been done) nor can 1412 * we allow DLS bypass. 1413 */ 1414 if (!mac_rx_bypass_set(dsp->ds_mch, dsp->ds_rx, dsp->ds_rx_arg)) 1415 return (ENOTSUP); 1416 1417 /* 1418 * Register soft ring resources. This will come in handy later if 1419 * the user decides to modify CPU bindings to use more CPUs for the 1420 * device in which case we will switch to fanout using soft rings. 1421 */ 1422 mac_resource_set_common(dsp->ds_mch, 1423 (mac_resource_add_t)poll->poll_ring_add_cf, 1424 (mac_resource_remove_t)poll->poll_ring_remove_cf, 1425 (mac_resource_quiesce_t)poll->poll_ring_quiesce_cf, 1426 (mac_resource_restart_t)poll->poll_ring_restart_cf, 1427 (mac_resource_bind_t)poll->poll_ring_bind_cf, 1428 poll->poll_ring_ch); 1429 1430 mac_client_poll_enable(dsp->ds_mch); 1431 1432 dsp->ds_polling = B_TRUE; 1433 return (0); 1434 } 1435 1436 /* ARGSUSED */ 1437 static int 1438 dld_capab_poll_disable(dld_str_t *dsp, dld_capab_poll_t *poll) 1439 { 1440 if (!dsp->ds_polling) 1441 return (EINVAL); 1442 1443 mac_client_poll_disable(dsp->ds_mch); 1444 mac_resource_set(dsp->ds_mch, NULL, NULL); 1445 1446 dsp->ds_polling = B_FALSE; 1447 return (0); 1448 } 1449 1450 static int 1451 dld_capab_poll(dld_str_t *dsp, void *data, uint_t flags) 1452 { 1453 dld_capab_poll_t *poll = data; 1454 1455 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1456 1457 switch (flags) { 1458 case DLD_ENABLE: 1459 return (dld_capab_poll_enable(dsp, poll)); 1460 case DLD_DISABLE: 1461 return (dld_capab_poll_disable(dsp, poll)); 1462 } 1463 return (ENOTSUP); 1464 } 1465 1466 static int 1467 dld_capab_lso(dld_str_t *dsp, void *data, uint_t flags) 1468 { 1469 dld_capab_lso_t *lso = data; 1470 1471 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1472 1473 switch (flags) { 1474 case DLD_ENABLE: { 1475 mac_capab_lso_t mac_lso; 1476 1477 /* 1478 * Check if LSO is supported on this MAC & enable LSO 1479 * accordingly. 1480 */ 1481 if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_LSO, &mac_lso)) { 1482 lso->lso_max = mac_lso.lso_basic_tcp_ipv4.lso_max; 1483 lso->lso_flags = 0; 1484 /* translate the flag for mac clients */ 1485 if ((mac_lso.lso_flags & LSO_TX_BASIC_TCP_IPV4) != 0) 1486 lso->lso_flags |= DLD_LSO_BASIC_TCP_IPV4; 1487 dsp->ds_lso = B_TRUE; 1488 dsp->ds_lso_max = lso->lso_max; 1489 } else { 1490 dsp->ds_lso = B_FALSE; 1491 dsp->ds_lso_max = 0; 1492 return (ENOTSUP); 1493 } 1494 return (0); 1495 } 1496 case DLD_DISABLE: { 1497 dsp->ds_lso = B_FALSE; 1498 dsp->ds_lso_max = 0; 1499 return (0); 1500 } 1501 } 1502 return (ENOTSUP); 1503 } 1504 1505 static int 1506 dld_capab(dld_str_t *dsp, uint_t type, void *data, uint_t flags) 1507 { 1508 int err; 1509 1510 /* 1511 * Don't enable direct callback capabilities unless the caller is 1512 * the IP client. When a module is inserted in a stream (_I_INSERT) 1513 * the stack initiates capability disable, but due to races, the 1514 * module insertion may complete before the capability disable 1515 * completes. So we limit the check to DLD_ENABLE case. 1516 */ 1517 if ((flags == DLD_ENABLE && type != DLD_CAPAB_PERIM) && 1518 (dsp->ds_sap != ETHERTYPE_IP || 1519 !check_mod_above(dsp->ds_rq, "ip"))) { 1520 return (ENOTSUP); 1521 } 1522 1523 switch (type) { 1524 case DLD_CAPAB_DIRECT: 1525 err = dld_capab_direct(dsp, data, flags); 1526 break; 1527 1528 case DLD_CAPAB_POLL: 1529 err = dld_capab_poll(dsp, data, flags); 1530 break; 1531 1532 case DLD_CAPAB_PERIM: 1533 err = dld_capab_perim(dsp, data, flags); 1534 break; 1535 1536 case DLD_CAPAB_LSO: 1537 err = dld_capab_lso(dsp, data, flags); 1538 break; 1539 1540 default: 1541 err = ENOTSUP; 1542 break; 1543 } 1544 1545 return (err); 1546 } 1547 1548 /* 1549 * DL_CAPABILITY_ACK/DL_ERROR_ACK 1550 */ 1551 static void 1552 proto_capability_advertise(dld_str_t *dsp, mblk_t *mp) 1553 { 1554 dl_capability_ack_t *dlap; 1555 dl_capability_sub_t *dlsp; 1556 size_t subsize; 1557 dl_capab_dld_t dld; 1558 dl_capab_hcksum_t hcksum; 1559 dl_capab_zerocopy_t zcopy; 1560 dl_capab_vrrp_t vrrp; 1561 mac_capab_vrrp_t vrrp_capab; 1562 uint8_t *ptr; 1563 queue_t *q = dsp->ds_wq; 1564 mblk_t *mp1; 1565 boolean_t hcksum_capable = B_FALSE; 1566 boolean_t zcopy_capable = B_FALSE; 1567 boolean_t dld_capable = B_FALSE; 1568 boolean_t vrrp_capable = B_FALSE; 1569 1570 /* 1571 * Initially assume no capabilities. 1572 */ 1573 subsize = 0; 1574 1575 /* 1576 * Check if checksum offload is supported on this MAC. 1577 */ 1578 bzero(&hcksum, sizeof (dl_capab_hcksum_t)); 1579 if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_HCKSUM, 1580 &hcksum.hcksum_txflags)) { 1581 if (hcksum.hcksum_txflags != 0) { 1582 hcksum_capable = B_TRUE; 1583 subsize += sizeof (dl_capability_sub_t) + 1584 sizeof (dl_capab_hcksum_t); 1585 } 1586 } 1587 1588 /* 1589 * Check if zerocopy is supported on this interface. 1590 * If advertising DL_CAPAB_ZEROCOPY has not been explicitly disabled 1591 * then reserve space for that capability. 1592 */ 1593 if (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_ZCOPY, NULL) && 1594 !(dld_opt & DLD_OPT_NO_ZEROCOPY)) { 1595 zcopy_capable = B_TRUE; 1596 subsize += sizeof (dl_capability_sub_t) + 1597 sizeof (dl_capab_zerocopy_t); 1598 } 1599 1600 /* 1601 * Direct capability negotiation interface between IP and DLD 1602 */ 1603 if (dsp->ds_sap == ETHERTYPE_IP && check_mod_above(dsp->ds_rq, "ip")) { 1604 dld_capable = B_TRUE; 1605 subsize += sizeof (dl_capability_sub_t) + 1606 sizeof (dl_capab_dld_t); 1607 } 1608 1609 /* 1610 * Check if vrrp is supported on this interface. If so, reserve 1611 * space for that capability. 1612 */ 1613 if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_VRRP, &vrrp_capab)) { 1614 vrrp_capable = B_TRUE; 1615 subsize += sizeof (dl_capability_sub_t) + 1616 sizeof (dl_capab_vrrp_t); 1617 } 1618 1619 /* 1620 * If there are no capabilities to advertise or if we 1621 * can't allocate a response, send a DL_ERROR_ACK. 1622 */ 1623 if ((mp1 = reallocb(mp, 1624 sizeof (dl_capability_ack_t) + subsize, 0)) == NULL) { 1625 dlerrorack(q, mp, DL_CAPABILITY_REQ, DL_NOTSUPPORTED, 0); 1626 return; 1627 } 1628 1629 mp = mp1; 1630 DB_TYPE(mp) = M_PROTO; 1631 mp->b_wptr = mp->b_rptr + sizeof (dl_capability_ack_t) + subsize; 1632 bzero(mp->b_rptr, MBLKL(mp)); 1633 dlap = (dl_capability_ack_t *)mp->b_rptr; 1634 dlap->dl_primitive = DL_CAPABILITY_ACK; 1635 dlap->dl_sub_offset = sizeof (dl_capability_ack_t); 1636 dlap->dl_sub_length = subsize; 1637 ptr = (uint8_t *)&dlap[1]; 1638 1639 /* 1640 * TCP/IP checksum offload. 1641 */ 1642 if (hcksum_capable) { 1643 dlsp = (dl_capability_sub_t *)ptr; 1644 1645 dlsp->dl_cap = DL_CAPAB_HCKSUM; 1646 dlsp->dl_length = sizeof (dl_capab_hcksum_t); 1647 ptr += sizeof (dl_capability_sub_t); 1648 1649 hcksum.hcksum_version = HCKSUM_VERSION_1; 1650 dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); 1651 bcopy(&hcksum, ptr, sizeof (dl_capab_hcksum_t)); 1652 ptr += sizeof (dl_capab_hcksum_t); 1653 } 1654 1655 /* 1656 * Zero copy 1657 */ 1658 if (zcopy_capable) { 1659 dlsp = (dl_capability_sub_t *)ptr; 1660 1661 dlsp->dl_cap = DL_CAPAB_ZEROCOPY; 1662 dlsp->dl_length = sizeof (dl_capab_zerocopy_t); 1663 ptr += sizeof (dl_capability_sub_t); 1664 1665 bzero(&zcopy, sizeof (dl_capab_zerocopy_t)); 1666 zcopy.zerocopy_version = ZEROCOPY_VERSION_1; 1667 zcopy.zerocopy_flags = DL_CAPAB_VMSAFE_MEM; 1668 1669 dlcapabsetqid(&(zcopy.zerocopy_mid), dsp->ds_rq); 1670 bcopy(&zcopy, ptr, sizeof (dl_capab_zerocopy_t)); 1671 ptr += sizeof (dl_capab_zerocopy_t); 1672 } 1673 1674 /* 1675 * VRRP capability negotiation 1676 */ 1677 if (vrrp_capable) { 1678 dlsp = (dl_capability_sub_t *)ptr; 1679 dlsp->dl_cap = DL_CAPAB_VRRP; 1680 dlsp->dl_length = sizeof (dl_capab_vrrp_t); 1681 ptr += sizeof (dl_capability_sub_t); 1682 1683 bzero(&vrrp, sizeof (dl_capab_vrrp_t)); 1684 vrrp.vrrp_af = vrrp_capab.mcv_af; 1685 bcopy(&vrrp, ptr, sizeof (dl_capab_vrrp_t)); 1686 ptr += sizeof (dl_capab_vrrp_t); 1687 } 1688 1689 /* 1690 * Direct capability negotiation interface between IP and DLD. 1691 * Refer to dld.h for details. 1692 */ 1693 if (dld_capable) { 1694 dlsp = (dl_capability_sub_t *)ptr; 1695 dlsp->dl_cap = DL_CAPAB_DLD; 1696 dlsp->dl_length = sizeof (dl_capab_dld_t); 1697 ptr += sizeof (dl_capability_sub_t); 1698 1699 bzero(&dld, sizeof (dl_capab_dld_t)); 1700 dld.dld_version = DLD_CURRENT_VERSION; 1701 dld.dld_capab = (uintptr_t)dld_capab; 1702 dld.dld_capab_handle = (uintptr_t)dsp; 1703 1704 dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); 1705 bcopy(&dld, ptr, sizeof (dl_capab_dld_t)); 1706 ptr += sizeof (dl_capab_dld_t); 1707 } 1708 1709 ASSERT(ptr == mp->b_rptr + sizeof (dl_capability_ack_t) + subsize); 1710 qreply(q, mp); 1711 } 1712 1713 /* 1714 * Disable any enabled capabilities. 1715 */ 1716 void 1717 dld_capabilities_disable(dld_str_t *dsp) 1718 { 1719 if (dsp->ds_polling) 1720 (void) dld_capab_poll_disable(dsp, NULL); 1721 } 1722