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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 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 ASSERT(IMPLY(dlp->dl_qos_offset != 0, dlp->dl_qos_length != 0)); 305 ASSERT(IMPLY(dlp->dl_qos_range_offset != 0, 306 dlp->dl_qos_range_length != 0)); 307 ASSERT(IMPLY(dlp->dl_addr_offset != 0, dlp->dl_addr_length != 0)); 308 ASSERT(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 mac_client_set_intr_cpu(mdip, dsp->ds_mch, intr_cpu); 480 481 /* 482 * Copy in MAC address. 483 */ 484 dlsap_addr_length = dsp->ds_mip->mi_addr_length; 485 mac_unicast_primary_get(dsp->ds_mh, dlsap_addr); 486 487 /* 488 * Copy in the SAP. 489 */ 490 *(uint16_t *)(dlsap_addr + dlsap_addr_length) = sap; 491 dlsap_addr_length += sizeof (uint16_t); 492 493 dsp->ds_dlstate = DL_IDLE; 494 dlbindack(q, mp, sap, dlsap_addr, dlsap_addr_length, 0, 0); 495 return; 496 497 failed2: 498 mac_perim_exit(mph); 499 failed: 500 dlerrorack(q, mp, DL_BIND_REQ, dl_err, (t_uscalar_t)err); 501 } 502 503 /* 504 * DL_UNBIND_REQ 505 */ 506 static void 507 proto_unbind_req(dld_str_t *dsp, mblk_t *mp) 508 { 509 queue_t *q = dsp->ds_wq; 510 t_uscalar_t dl_err; 511 mac_perim_handle_t mph; 512 513 if (MBLKL(mp) < sizeof (dl_unbind_req_t)) { 514 dl_err = DL_BADPRIM; 515 goto failed; 516 } 517 518 if (dsp->ds_dlstate != DL_IDLE) { 519 dl_err = DL_OUTSTATE; 520 goto failed; 521 } 522 523 mutex_enter(&dsp->ds_lock); 524 while (dsp->ds_datathr_cnt != 0) 525 cv_wait(&dsp->ds_datathr_cv, &dsp->ds_lock); 526 527 dsp->ds_dlstate = DL_UNBIND_PENDING; 528 mutex_exit(&dsp->ds_lock); 529 530 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 531 /* 532 * Unbind the channel to stop packets being received. 533 */ 534 dls_unbind(dsp); 535 536 /* 537 * Disable polling mode, if it is enabled. 538 */ 539 (void) dld_capab_poll_disable(dsp, NULL); 540 541 /* 542 * Clear LSO flags. 543 */ 544 dsp->ds_lso = B_FALSE; 545 dsp->ds_lso_max = 0; 546 547 /* 548 * Clear the receive callback. 549 */ 550 dls_rx_set(dsp, NULL, NULL); 551 dsp->ds_direct = B_FALSE; 552 553 /* 554 * Set the mode back to the default (unitdata). 555 */ 556 dsp->ds_mode = DLD_UNITDATA; 557 dsp->ds_dlstate = DL_UNBOUND; 558 559 dls_active_clear(dsp, B_FALSE); 560 mac_perim_exit(mph); 561 dlokack(dsp->ds_wq, mp, DL_UNBIND_REQ); 562 return; 563 failed: 564 dlerrorack(q, mp, DL_UNBIND_REQ, dl_err, 0); 565 } 566 567 /* 568 * DL_PROMISCON_REQ 569 */ 570 static void 571 proto_promiscon_req(dld_str_t *dsp, mblk_t *mp) 572 { 573 dl_promiscon_req_t *dlp = (dl_promiscon_req_t *)mp->b_rptr; 574 int err = 0; 575 t_uscalar_t dl_err; 576 uint32_t promisc_saved; 577 queue_t *q = dsp->ds_wq; 578 mac_perim_handle_t mph; 579 580 if (MBLKL(mp) < sizeof (dl_promiscon_req_t)) { 581 dl_err = DL_BADPRIM; 582 goto failed; 583 } 584 585 if (dsp->ds_dlstate == DL_UNATTACHED || 586 DL_ACK_PENDING(dsp->ds_dlstate)) { 587 dl_err = DL_OUTSTATE; 588 goto failed; 589 } 590 591 promisc_saved = dsp->ds_promisc; 592 switch (dlp->dl_level) { 593 case DL_PROMISC_SAP: 594 dsp->ds_promisc |= DLS_PROMISC_SAP; 595 break; 596 597 case DL_PROMISC_MULTI: 598 dsp->ds_promisc |= DLS_PROMISC_MULTI; 599 break; 600 601 case DL_PROMISC_PHYS: 602 dsp->ds_promisc |= DLS_PROMISC_PHYS; 603 break; 604 605 default: 606 dl_err = DL_NOTSUPPORTED; 607 goto failed; 608 } 609 610 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 611 612 if ((promisc_saved == 0) && (err = dls_active_set(dsp)) != 0) { 613 dsp->ds_promisc = promisc_saved; 614 dl_err = DL_SYSERR; 615 goto failed2; 616 } 617 618 /* 619 * Adjust channel promiscuity. 620 */ 621 err = dls_promisc(dsp, promisc_saved); 622 623 if (err != 0) { 624 dl_err = DL_SYSERR; 625 dsp->ds_promisc = promisc_saved; 626 if (promisc_saved == 0) 627 dls_active_clear(dsp, B_FALSE); 628 goto failed2; 629 } 630 631 mac_perim_exit(mph); 632 633 dlokack(q, mp, DL_PROMISCON_REQ); 634 return; 635 636 failed2: 637 mac_perim_exit(mph); 638 failed: 639 dlerrorack(q, mp, DL_PROMISCON_REQ, dl_err, (t_uscalar_t)err); 640 } 641 642 /* 643 * DL_PROMISCOFF_REQ 644 */ 645 static void 646 proto_promiscoff_req(dld_str_t *dsp, mblk_t *mp) 647 { 648 dl_promiscoff_req_t *dlp = (dl_promiscoff_req_t *)mp->b_rptr; 649 int err = 0; 650 t_uscalar_t dl_err; 651 uint32_t promisc_saved; 652 queue_t *q = dsp->ds_wq; 653 mac_perim_handle_t mph; 654 655 if (MBLKL(mp) < sizeof (dl_promiscoff_req_t)) { 656 dl_err = DL_BADPRIM; 657 goto failed; 658 } 659 660 if (dsp->ds_dlstate == DL_UNATTACHED || 661 DL_ACK_PENDING(dsp->ds_dlstate)) { 662 dl_err = DL_OUTSTATE; 663 goto failed; 664 } 665 666 promisc_saved = dsp->ds_promisc; 667 switch (dlp->dl_level) { 668 case DL_PROMISC_SAP: 669 if (!(dsp->ds_promisc & DLS_PROMISC_SAP)) { 670 dl_err = DL_NOTENAB; 671 goto failed; 672 } 673 dsp->ds_promisc &= ~DLS_PROMISC_SAP; 674 break; 675 676 case DL_PROMISC_MULTI: 677 if (!(dsp->ds_promisc & DLS_PROMISC_MULTI)) { 678 dl_err = DL_NOTENAB; 679 goto failed; 680 } 681 dsp->ds_promisc &= ~DLS_PROMISC_MULTI; 682 break; 683 684 case DL_PROMISC_PHYS: 685 if (!(dsp->ds_promisc & DLS_PROMISC_PHYS)) { 686 dl_err = DL_NOTENAB; 687 goto failed; 688 } 689 dsp->ds_promisc &= ~DLS_PROMISC_PHYS; 690 break; 691 692 default: 693 dl_err = DL_NOTSUPPORTED; 694 goto failed; 695 } 696 697 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 698 /* 699 * Adjust channel promiscuity. 700 */ 701 err = dls_promisc(dsp, promisc_saved); 702 703 if (err != 0) { 704 mac_perim_exit(mph); 705 dl_err = DL_SYSERR; 706 goto failed; 707 } 708 709 if (dsp->ds_promisc == 0) 710 dls_active_clear(dsp, B_FALSE); 711 712 mac_perim_exit(mph); 713 714 dlokack(q, mp, DL_PROMISCOFF_REQ); 715 return; 716 failed: 717 dlerrorack(q, mp, DL_PROMISCOFF_REQ, dl_err, (t_uscalar_t)err); 718 } 719 720 /* 721 * DL_ENABMULTI_REQ 722 */ 723 static void 724 proto_enabmulti_req(dld_str_t *dsp, mblk_t *mp) 725 { 726 dl_enabmulti_req_t *dlp = (dl_enabmulti_req_t *)mp->b_rptr; 727 int err = 0; 728 t_uscalar_t dl_err; 729 queue_t *q = dsp->ds_wq; 730 mac_perim_handle_t mph; 731 732 if (dsp->ds_dlstate == DL_UNATTACHED || 733 DL_ACK_PENDING(dsp->ds_dlstate)) { 734 dl_err = DL_OUTSTATE; 735 goto failed; 736 } 737 738 if (MBLKL(mp) < sizeof (dl_enabmulti_req_t) || 739 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 740 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 741 dl_err = DL_BADPRIM; 742 goto failed; 743 } 744 745 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 746 747 if ((dsp->ds_dmap == NULL) && (err = dls_active_set(dsp)) != 0) { 748 dl_err = DL_SYSERR; 749 goto failed2; 750 } 751 752 err = dls_multicst_add(dsp, mp->b_rptr + dlp->dl_addr_offset); 753 if (err != 0) { 754 switch (err) { 755 case EINVAL: 756 dl_err = DL_BADADDR; 757 err = 0; 758 break; 759 case ENOSPC: 760 dl_err = DL_TOOMANY; 761 err = 0; 762 break; 763 default: 764 dl_err = DL_SYSERR; 765 break; 766 } 767 if (dsp->ds_dmap == NULL) 768 dls_active_clear(dsp, B_FALSE); 769 goto failed2; 770 } 771 772 mac_perim_exit(mph); 773 774 dlokack(q, mp, DL_ENABMULTI_REQ); 775 return; 776 777 failed2: 778 mac_perim_exit(mph); 779 failed: 780 dlerrorack(q, mp, DL_ENABMULTI_REQ, dl_err, (t_uscalar_t)err); 781 } 782 783 /* 784 * DL_DISABMULTI_REQ 785 */ 786 static void 787 proto_disabmulti_req(dld_str_t *dsp, mblk_t *mp) 788 { 789 dl_disabmulti_req_t *dlp = (dl_disabmulti_req_t *)mp->b_rptr; 790 int err = 0; 791 t_uscalar_t dl_err; 792 queue_t *q = dsp->ds_wq; 793 mac_perim_handle_t mph; 794 795 if (dsp->ds_dlstate == DL_UNATTACHED || 796 DL_ACK_PENDING(dsp->ds_dlstate)) { 797 dl_err = DL_OUTSTATE; 798 goto failed; 799 } 800 801 if (MBLKL(mp) < sizeof (dl_disabmulti_req_t) || 802 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 803 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 804 dl_err = DL_BADPRIM; 805 goto failed; 806 } 807 808 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 809 err = dls_multicst_remove(dsp, mp->b_rptr + dlp->dl_addr_offset); 810 if ((err == 0) && (dsp->ds_dmap == NULL)) 811 dls_active_clear(dsp, B_FALSE); 812 mac_perim_exit(mph); 813 814 if (err != 0) { 815 switch (err) { 816 case EINVAL: 817 dl_err = DL_BADADDR; 818 err = 0; 819 break; 820 821 case ENOENT: 822 dl_err = DL_NOTENAB; 823 err = 0; 824 break; 825 826 default: 827 dl_err = DL_SYSERR; 828 break; 829 } 830 goto failed; 831 } 832 dlokack(q, mp, DL_DISABMULTI_REQ); 833 return; 834 failed: 835 dlerrorack(q, mp, DL_DISABMULTI_REQ, dl_err, (t_uscalar_t)err); 836 } 837 838 /* 839 * DL_PHYS_ADDR_REQ 840 */ 841 static void 842 proto_physaddr_req(dld_str_t *dsp, mblk_t *mp) 843 { 844 dl_phys_addr_req_t *dlp = (dl_phys_addr_req_t *)mp->b_rptr; 845 queue_t *q = dsp->ds_wq; 846 t_uscalar_t dl_err = 0; 847 char *addr = NULL; 848 uint_t addr_length; 849 850 if (MBLKL(mp) < sizeof (dl_phys_addr_req_t)) { 851 dl_err = DL_BADPRIM; 852 goto done; 853 } 854 855 if (dsp->ds_dlstate == DL_UNATTACHED || 856 DL_ACK_PENDING(dsp->ds_dlstate)) { 857 dl_err = DL_OUTSTATE; 858 goto done; 859 } 860 861 addr_length = dsp->ds_mip->mi_addr_length; 862 if (addr_length > 0) { 863 addr = kmem_alloc(addr_length, KM_SLEEP); 864 switch (dlp->dl_addr_type) { 865 case DL_CURR_PHYS_ADDR: 866 mac_unicast_primary_get(dsp->ds_mh, (uint8_t *)addr); 867 break; 868 case DL_FACT_PHYS_ADDR: 869 bcopy(dsp->ds_mip->mi_unicst_addr, addr, addr_length); 870 break; 871 case DL_CURR_DEST_ADDR: 872 if (!mac_dst_get(dsp->ds_mh, (uint8_t *)addr)) 873 dl_err = DL_NOTSUPPORTED; 874 break; 875 default: 876 dl_err = DL_UNSUPPORTED; 877 } 878 } 879 done: 880 if (dl_err == 0) 881 dlphysaddrack(q, mp, addr, (t_uscalar_t)addr_length); 882 else 883 dlerrorack(q, mp, DL_PHYS_ADDR_REQ, dl_err, 0); 884 if (addr != NULL) 885 kmem_free(addr, addr_length); 886 } 887 888 /* 889 * DL_SET_PHYS_ADDR_REQ 890 */ 891 static void 892 proto_setphysaddr_req(dld_str_t *dsp, mblk_t *mp) 893 { 894 dl_set_phys_addr_req_t *dlp = (dl_set_phys_addr_req_t *)mp->b_rptr; 895 int err = 0; 896 t_uscalar_t dl_err; 897 queue_t *q = dsp->ds_wq; 898 mac_perim_handle_t mph; 899 900 if (dsp->ds_dlstate == DL_UNATTACHED || 901 DL_ACK_PENDING(dsp->ds_dlstate)) { 902 dl_err = DL_OUTSTATE; 903 goto failed; 904 } 905 906 if (MBLKL(mp) < sizeof (dl_set_phys_addr_req_t) || 907 !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || 908 dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { 909 dl_err = DL_BADPRIM; 910 goto failed; 911 } 912 913 mac_perim_enter_by_mh(dsp->ds_mh, &mph); 914 915 if ((err = dls_active_set(dsp)) != 0) { 916 dl_err = DL_SYSERR; 917 goto failed2; 918 } 919 920 /* 921 * If mac-nospoof is enabled and the link is owned by a 922 * non-global zone, changing the mac address is not allowed. 923 */ 924 if (dsp->ds_dlp->dl_zid != GLOBAL_ZONEID && 925 mac_protect_enabled(dsp->ds_mch, MPT_MACNOSPOOF)) { 926 dls_active_clear(dsp, B_FALSE); 927 err = EACCES; 928 goto failed2; 929 } 930 931 err = mac_unicast_primary_set(dsp->ds_mh, 932 mp->b_rptr + dlp->dl_addr_offset); 933 if (err != 0) { 934 switch (err) { 935 case EINVAL: 936 dl_err = DL_BADADDR; 937 err = 0; 938 break; 939 940 default: 941 dl_err = DL_SYSERR; 942 break; 943 } 944 dls_active_clear(dsp, B_FALSE); 945 goto failed2; 946 947 } 948 949 mac_perim_exit(mph); 950 951 dlokack(q, mp, DL_SET_PHYS_ADDR_REQ); 952 return; 953 954 failed2: 955 mac_perim_exit(mph); 956 failed: 957 dlerrorack(q, mp, DL_SET_PHYS_ADDR_REQ, dl_err, (t_uscalar_t)err); 958 } 959 960 /* 961 * DL_UDQOS_REQ 962 */ 963 static void 964 proto_udqos_req(dld_str_t *dsp, mblk_t *mp) 965 { 966 dl_udqos_req_t *dlp = (dl_udqos_req_t *)mp->b_rptr; 967 dl_qos_cl_sel1_t *selp; 968 int off, len; 969 t_uscalar_t dl_err; 970 queue_t *q = dsp->ds_wq; 971 972 off = dlp->dl_qos_offset; 973 len = dlp->dl_qos_length; 974 975 if (MBLKL(mp) < sizeof (dl_udqos_req_t) || !MBLKIN(mp, off, len)) { 976 dl_err = DL_BADPRIM; 977 goto failed; 978 } 979 980 selp = (dl_qos_cl_sel1_t *)(mp->b_rptr + off); 981 if (selp->dl_qos_type != DL_QOS_CL_SEL1) { 982 dl_err = DL_BADQOSTYPE; 983 goto failed; 984 } 985 986 if (selp->dl_priority > (1 << VLAN_PRI_SIZE) - 1 || 987 selp->dl_priority < 0) { 988 dl_err = DL_BADQOSPARAM; 989 goto failed; 990 } 991 992 dsp->ds_pri = selp->dl_priority; 993 dlokack(q, mp, DL_UDQOS_REQ); 994 return; 995 failed: 996 dlerrorack(q, mp, DL_UDQOS_REQ, dl_err, 0); 997 } 998 999 static boolean_t 1000 check_mod_above(queue_t *q, const char *mod) 1001 { 1002 queue_t *next_q; 1003 boolean_t ret = B_TRUE; 1004 1005 claimstr(q); 1006 next_q = q->q_next; 1007 if (strcmp(next_q->q_qinfo->qi_minfo->mi_idname, mod) != 0) 1008 ret = B_FALSE; 1009 releasestr(q); 1010 return (ret); 1011 } 1012 1013 /* 1014 * DL_CAPABILITY_REQ 1015 */ 1016 static void 1017 proto_capability_req(dld_str_t *dsp, mblk_t *mp) 1018 { 1019 dl_capability_req_t *dlp = (dl_capability_req_t *)mp->b_rptr; 1020 dl_capability_sub_t *sp; 1021 size_t size, len; 1022 offset_t off, end; 1023 t_uscalar_t dl_err; 1024 queue_t *q = dsp->ds_wq; 1025 1026 if (MBLKL(mp) < sizeof (dl_capability_req_t)) { 1027 dl_err = DL_BADPRIM; 1028 goto failed; 1029 } 1030 1031 if (dsp->ds_dlstate == DL_UNATTACHED || 1032 DL_ACK_PENDING(dsp->ds_dlstate)) { 1033 dl_err = DL_OUTSTATE; 1034 goto failed; 1035 } 1036 1037 /* 1038 * This request is overloaded. If there are no requested capabilities 1039 * then we just want to acknowledge with all the capabilities we 1040 * support. Otherwise we enable the set of capabilities requested. 1041 */ 1042 if (dlp->dl_sub_length == 0) { 1043 proto_capability_advertise(dsp, mp); 1044 return; 1045 } 1046 1047 if (!MBLKIN(mp, dlp->dl_sub_offset, dlp->dl_sub_length)) { 1048 dl_err = DL_BADPRIM; 1049 goto failed; 1050 } 1051 1052 dlp->dl_primitive = DL_CAPABILITY_ACK; 1053 1054 off = dlp->dl_sub_offset; 1055 len = dlp->dl_sub_length; 1056 1057 /* 1058 * Walk the list of capabilities to be enabled. 1059 */ 1060 for (end = off + len; off < end; ) { 1061 sp = (dl_capability_sub_t *)(mp->b_rptr + off); 1062 size = sizeof (dl_capability_sub_t) + sp->dl_length; 1063 1064 if (off + size > end || 1065 !IS_P2ALIGNED(off, sizeof (uint32_t))) { 1066 dl_err = DL_BADPRIM; 1067 goto failed; 1068 } 1069 1070 switch (sp->dl_cap) { 1071 /* 1072 * TCP/IP checksum offload to hardware. 1073 */ 1074 case DL_CAPAB_HCKSUM: { 1075 dl_capab_hcksum_t *hcksump; 1076 dl_capab_hcksum_t hcksum; 1077 1078 hcksump = (dl_capab_hcksum_t *)&sp[1]; 1079 /* 1080 * Copy for alignment. 1081 */ 1082 bcopy(hcksump, &hcksum, sizeof (dl_capab_hcksum_t)); 1083 dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); 1084 bcopy(&hcksum, hcksump, sizeof (dl_capab_hcksum_t)); 1085 break; 1086 } 1087 1088 case DL_CAPAB_DLD: { 1089 dl_capab_dld_t *dldp; 1090 dl_capab_dld_t dld; 1091 1092 dldp = (dl_capab_dld_t *)&sp[1]; 1093 /* 1094 * Copy for alignment. 1095 */ 1096 bcopy(dldp, &dld, sizeof (dl_capab_dld_t)); 1097 dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); 1098 bcopy(&dld, dldp, sizeof (dl_capab_dld_t)); 1099 break; 1100 } 1101 default: 1102 break; 1103 } 1104 off += size; 1105 } 1106 qreply(q, mp); 1107 return; 1108 failed: 1109 dlerrorack(q, mp, DL_CAPABILITY_REQ, dl_err, 0); 1110 } 1111 1112 /* 1113 * DL_NOTIFY_REQ 1114 */ 1115 static void 1116 proto_notify_req(dld_str_t *dsp, mblk_t *mp) 1117 { 1118 dl_notify_req_t *dlp = (dl_notify_req_t *)mp->b_rptr; 1119 t_uscalar_t dl_err; 1120 queue_t *q = dsp->ds_wq; 1121 uint_t note = 1122 DL_NOTE_PROMISC_ON_PHYS | 1123 DL_NOTE_PROMISC_OFF_PHYS | 1124 DL_NOTE_PHYS_ADDR | 1125 DL_NOTE_LINK_UP | 1126 DL_NOTE_LINK_DOWN | 1127 DL_NOTE_CAPAB_RENEG | 1128 DL_NOTE_FASTPATH_FLUSH | 1129 DL_NOTE_SPEED | 1130 DL_NOTE_SDU_SIZE; 1131 1132 if (MBLKL(mp) < sizeof (dl_notify_req_t)) { 1133 dl_err = DL_BADPRIM; 1134 goto failed; 1135 } 1136 1137 if (dsp->ds_dlstate == DL_UNATTACHED || 1138 DL_ACK_PENDING(dsp->ds_dlstate)) { 1139 dl_err = DL_OUTSTATE; 1140 goto failed; 1141 } 1142 1143 note &= ~(mac_no_notification(dsp->ds_mh)); 1144 1145 /* 1146 * Cache the notifications that are being enabled. 1147 */ 1148 dsp->ds_notifications = dlp->dl_notifications & note; 1149 /* 1150 * The ACK carries all notifications regardless of which set is 1151 * being enabled. 1152 */ 1153 dlnotifyack(q, mp, note); 1154 1155 /* 1156 * Generate DL_NOTIFY_IND messages for each enabled notification. 1157 */ 1158 if (dsp->ds_notifications != 0) { 1159 dld_str_notify_ind(dsp); 1160 } 1161 return; 1162 failed: 1163 dlerrorack(q, mp, DL_NOTIFY_REQ, dl_err, 0); 1164 } 1165 1166 /* 1167 * DL_UINTDATA_REQ 1168 */ 1169 void 1170 proto_unitdata_req(dld_str_t *dsp, mblk_t *mp) 1171 { 1172 queue_t *q = dsp->ds_wq; 1173 dl_unitdata_req_t *dlp = (dl_unitdata_req_t *)mp->b_rptr; 1174 off_t off; 1175 size_t len, size; 1176 const uint8_t *addr; 1177 uint16_t sap; 1178 uint_t addr_length; 1179 mblk_t *bp, *payload; 1180 uint32_t start, stuff, end, value, flags; 1181 t_uscalar_t dl_err; 1182 uint_t max_sdu; 1183 1184 if (MBLKL(mp) < sizeof (dl_unitdata_req_t) || mp->b_cont == NULL) { 1185 dlerrorack(q, mp, DL_UNITDATA_REQ, DL_BADPRIM, 0); 1186 return; 1187 } 1188 1189 mutex_enter(&dsp->ds_lock); 1190 if (dsp->ds_dlstate != DL_IDLE) { 1191 mutex_exit(&dsp->ds_lock); 1192 dlerrorack(q, mp, DL_UNITDATA_REQ, DL_OUTSTATE, 0); 1193 return; 1194 } 1195 DLD_DATATHR_INC(dsp); 1196 mutex_exit(&dsp->ds_lock); 1197 1198 addr_length = dsp->ds_mip->mi_addr_length; 1199 1200 off = dlp->dl_dest_addr_offset; 1201 len = dlp->dl_dest_addr_length; 1202 1203 if (!MBLKIN(mp, off, len) || !IS_P2ALIGNED(off, sizeof (uint16_t))) { 1204 dl_err = DL_BADPRIM; 1205 goto failed; 1206 } 1207 1208 if (len != addr_length + sizeof (uint16_t)) { 1209 dl_err = DL_BADADDR; 1210 goto failed; 1211 } 1212 1213 addr = mp->b_rptr + off; 1214 sap = *(uint16_t *)(mp->b_rptr + off + addr_length); 1215 1216 /* 1217 * Check the length of the packet and the block types. 1218 */ 1219 size = 0; 1220 payload = mp->b_cont; 1221 for (bp = payload; bp != NULL; bp = bp->b_cont) { 1222 if (DB_TYPE(bp) != M_DATA) 1223 goto baddata; 1224 1225 size += MBLKL(bp); 1226 } 1227 1228 mac_sdu_get(dsp->ds_mh, NULL, &max_sdu); 1229 if (size > max_sdu) 1230 goto baddata; 1231 1232 /* 1233 * Build a packet header. 1234 */ 1235 if ((bp = dls_header(dsp, addr, sap, dlp->dl_priority.dl_max, 1236 &payload)) == NULL) { 1237 dl_err = DL_BADADDR; 1238 goto failed; 1239 } 1240 1241 /* 1242 * We no longer need the M_PROTO header, so free it. 1243 */ 1244 freeb(mp); 1245 1246 /* 1247 * Transfer the checksum offload information if it is present. 1248 */ 1249 hcksum_retrieve(payload, NULL, NULL, &start, &stuff, &end, &value, 1250 &flags); 1251 (void) hcksum_assoc(bp, NULL, NULL, start, stuff, end, value, flags, 0); 1252 1253 /* 1254 * Link the payload onto the new header. 1255 */ 1256 ASSERT(bp->b_cont == NULL); 1257 bp->b_cont = payload; 1258 1259 /* 1260 * No lock can be held across modules and putnext()'s, 1261 * which can happen here with the call from DLD_TX(). 1262 */ 1263 if (DLD_TX(dsp, bp, 0, 0) != NULL) { 1264 /* flow-controlled */ 1265 DLD_SETQFULL(dsp); 1266 } 1267 DLD_DATATHR_DCR(dsp); 1268 return; 1269 1270 failed: 1271 dlerrorack(q, mp, DL_UNITDATA_REQ, dl_err, 0); 1272 DLD_DATATHR_DCR(dsp); 1273 return; 1274 1275 baddata: 1276 dluderrorind(q, mp, (void *)addr, len, DL_BADDATA, 0); 1277 DLD_DATATHR_DCR(dsp); 1278 } 1279 1280 /* 1281 * DL_PASSIVE_REQ 1282 */ 1283 static void 1284 proto_passive_req(dld_str_t *dsp, mblk_t *mp) 1285 { 1286 t_uscalar_t dl_err; 1287 1288 /* 1289 * If we've already become active by issuing an active primitive, 1290 * then it's too late to try to become passive. 1291 */ 1292 if (dsp->ds_passivestate == DLD_ACTIVE) { 1293 dl_err = DL_OUTSTATE; 1294 goto failed; 1295 } 1296 1297 if (MBLKL(mp) < sizeof (dl_passive_req_t)) { 1298 dl_err = DL_BADPRIM; 1299 goto failed; 1300 } 1301 1302 dsp->ds_passivestate = DLD_PASSIVE; 1303 dlokack(dsp->ds_wq, mp, DL_PASSIVE_REQ); 1304 return; 1305 failed: 1306 dlerrorack(dsp->ds_wq, mp, DL_PASSIVE_REQ, dl_err, 0); 1307 } 1308 1309 1310 /* 1311 * Catch-all handler. 1312 */ 1313 static void 1314 proto_req(dld_str_t *dsp, mblk_t *mp) 1315 { 1316 union DL_primitives *dlp = (union DL_primitives *)mp->b_rptr; 1317 1318 dlerrorack(dsp->ds_wq, mp, dlp->dl_primitive, DL_UNSUPPORTED, 0); 1319 } 1320 1321 static int 1322 dld_capab_perim(dld_str_t *dsp, void *data, uint_t flags) 1323 { 1324 switch (flags) { 1325 case DLD_ENABLE: 1326 mac_perim_enter_by_mh(dsp->ds_mh, (mac_perim_handle_t *)data); 1327 return (0); 1328 1329 case DLD_DISABLE: 1330 mac_perim_exit((mac_perim_handle_t)data); 1331 return (0); 1332 1333 case DLD_QUERY: 1334 return (mac_perim_held(dsp->ds_mh)); 1335 } 1336 return (0); 1337 } 1338 1339 static int 1340 dld_capab_direct(dld_str_t *dsp, void *data, uint_t flags) 1341 { 1342 dld_capab_direct_t *direct = data; 1343 1344 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1345 1346 switch (flags) { 1347 case DLD_ENABLE: 1348 dls_rx_set(dsp, (dls_rx_t)direct->di_rx_cf, 1349 direct->di_rx_ch); 1350 1351 direct->di_tx_df = (uintptr_t)str_mdata_fastpath_put; 1352 direct->di_tx_dh = dsp; 1353 direct->di_tx_cb_df = (uintptr_t)mac_client_tx_notify; 1354 direct->di_tx_cb_dh = dsp->ds_mch; 1355 direct->di_tx_fctl_df = (uintptr_t)mac_tx_is_flow_blocked; 1356 direct->di_tx_fctl_dh = dsp->ds_mch; 1357 1358 dsp->ds_direct = B_TRUE; 1359 1360 return (0); 1361 1362 case DLD_DISABLE: 1363 dls_rx_set(dsp, (dsp->ds_mode == DLD_FASTPATH) ? 1364 dld_str_rx_fastpath : dld_str_rx_unitdata, (void *)dsp); 1365 dsp->ds_direct = B_FALSE; 1366 1367 return (0); 1368 } 1369 return (ENOTSUP); 1370 } 1371 1372 /* 1373 * dld_capab_poll_enable() 1374 * 1375 * This function is misnamed. All polling and fanouts are run out of the 1376 * lower mac (in case of VNIC and the only mac in case of NICs). The 1377 * availability of Rx ring and promiscous mode is all taken care between 1378 * the soft ring set (mac_srs), the Rx ring, and S/W classifier. Any 1379 * fanout necessary is done by the soft rings that are part of the 1380 * mac_srs (by default mac_srs sends the packets up via a TCP and 1381 * non TCP soft ring). 1382 * 1383 * The mac_srs (or its associated soft rings) always store the ill_rx_ring 1384 * (the cookie returned when they registered with IP during plumb) as their 1385 * 2nd argument which is passed up as mac_resource_handle_t. The upcall 1386 * function and 1st argument is what the caller registered when they 1387 * called mac_rx_classify_flow_add() to register the flow. For VNIC, 1388 * the function is vnic_rx and argument is vnic_t. For regular NIC 1389 * case, it mac_rx_default and mac_handle_t. As explained above, the 1390 * mac_srs (or its soft ring) will add the ill_rx_ring (mac_resource_handle_t) 1391 * from its stored 2nd argument. 1392 */ 1393 static int 1394 dld_capab_poll_enable(dld_str_t *dsp, dld_capab_poll_t *poll) 1395 { 1396 if (dsp->ds_polling) 1397 return (EINVAL); 1398 1399 if ((dld_opt & DLD_OPT_NO_POLL) != 0 || dsp->ds_mode == DLD_RAW) 1400 return (ENOTSUP); 1401 1402 /* 1403 * Enable client polling if and only if DLS bypass is possible. 1404 * Special cases like VLANs need DLS processing in the Rx data path. 1405 * In such a case we can neither allow the client (IP) to directly 1406 * poll the softring (since DLS processing hasn't been done) nor can 1407 * we allow DLS bypass. 1408 */ 1409 if (!mac_rx_bypass_set(dsp->ds_mch, dsp->ds_rx, dsp->ds_rx_arg)) 1410 return (ENOTSUP); 1411 1412 /* 1413 * Register soft ring resources. This will come in handy later if 1414 * the user decides to modify CPU bindings to use more CPUs for the 1415 * device in which case we will switch to fanout using soft rings. 1416 */ 1417 mac_resource_set_common(dsp->ds_mch, 1418 (mac_resource_add_t)poll->poll_ring_add_cf, 1419 (mac_resource_remove_t)poll->poll_ring_remove_cf, 1420 (mac_resource_quiesce_t)poll->poll_ring_quiesce_cf, 1421 (mac_resource_restart_t)poll->poll_ring_restart_cf, 1422 (mac_resource_bind_t)poll->poll_ring_bind_cf, 1423 poll->poll_ring_ch); 1424 1425 mac_client_poll_enable(dsp->ds_mch); 1426 1427 dsp->ds_polling = B_TRUE; 1428 return (0); 1429 } 1430 1431 /* ARGSUSED */ 1432 static int 1433 dld_capab_poll_disable(dld_str_t *dsp, dld_capab_poll_t *poll) 1434 { 1435 if (!dsp->ds_polling) 1436 return (EINVAL); 1437 1438 mac_client_poll_disable(dsp->ds_mch); 1439 mac_resource_set(dsp->ds_mch, NULL, NULL); 1440 1441 dsp->ds_polling = B_FALSE; 1442 return (0); 1443 } 1444 1445 static int 1446 dld_capab_poll(dld_str_t *dsp, void *data, uint_t flags) 1447 { 1448 dld_capab_poll_t *poll = data; 1449 1450 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1451 1452 switch (flags) { 1453 case DLD_ENABLE: 1454 return (dld_capab_poll_enable(dsp, poll)); 1455 case DLD_DISABLE: 1456 return (dld_capab_poll_disable(dsp, poll)); 1457 } 1458 return (ENOTSUP); 1459 } 1460 1461 static int 1462 dld_capab_lso(dld_str_t *dsp, void *data, uint_t flags) 1463 { 1464 dld_capab_lso_t *lso = data; 1465 1466 ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); 1467 1468 switch (flags) { 1469 case DLD_ENABLE: { 1470 mac_capab_lso_t mac_lso; 1471 1472 /* 1473 * Check if LSO is supported on this MAC & enable LSO 1474 * accordingly. 1475 */ 1476 if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_LSO, &mac_lso)) { 1477 lso->lso_max = mac_lso.lso_basic_tcp_ipv4.lso_max; 1478 lso->lso_flags = 0; 1479 /* translate the flag for mac clients */ 1480 if ((mac_lso.lso_flags & LSO_TX_BASIC_TCP_IPV4) != 0) 1481 lso->lso_flags |= DLD_LSO_BASIC_TCP_IPV4; 1482 dsp->ds_lso = B_TRUE; 1483 dsp->ds_lso_max = lso->lso_max; 1484 } else { 1485 dsp->ds_lso = B_FALSE; 1486 dsp->ds_lso_max = 0; 1487 return (ENOTSUP); 1488 } 1489 return (0); 1490 } 1491 case DLD_DISABLE: { 1492 dsp->ds_lso = B_FALSE; 1493 dsp->ds_lso_max = 0; 1494 return (0); 1495 } 1496 } 1497 return (ENOTSUP); 1498 } 1499 1500 static int 1501 dld_capab(dld_str_t *dsp, uint_t type, void *data, uint_t flags) 1502 { 1503 int err; 1504 1505 /* 1506 * Don't enable direct callback capabilities unless the caller is 1507 * the IP client. When a module is inserted in a stream (_I_INSERT) 1508 * the stack initiates capability disable, but due to races, the 1509 * module insertion may complete before the capability disable 1510 * completes. So we limit the check to DLD_ENABLE case. 1511 */ 1512 if ((flags == DLD_ENABLE && type != DLD_CAPAB_PERIM) && 1513 (dsp->ds_sap != ETHERTYPE_IP || 1514 !check_mod_above(dsp->ds_rq, "ip"))) { 1515 return (ENOTSUP); 1516 } 1517 1518 switch (type) { 1519 case DLD_CAPAB_DIRECT: 1520 err = dld_capab_direct(dsp, data, flags); 1521 break; 1522 1523 case DLD_CAPAB_POLL: 1524 err = dld_capab_poll(dsp, data, flags); 1525 break; 1526 1527 case DLD_CAPAB_PERIM: 1528 err = dld_capab_perim(dsp, data, flags); 1529 break; 1530 1531 case DLD_CAPAB_LSO: 1532 err = dld_capab_lso(dsp, data, flags); 1533 break; 1534 1535 default: 1536 err = ENOTSUP; 1537 break; 1538 } 1539 1540 return (err); 1541 } 1542 1543 /* 1544 * DL_CAPABILITY_ACK/DL_ERROR_ACK 1545 */ 1546 static void 1547 proto_capability_advertise(dld_str_t *dsp, mblk_t *mp) 1548 { 1549 dl_capability_ack_t *dlap; 1550 dl_capability_sub_t *dlsp; 1551 size_t subsize; 1552 dl_capab_dld_t dld; 1553 dl_capab_hcksum_t hcksum; 1554 dl_capab_zerocopy_t zcopy; 1555 dl_capab_vrrp_t vrrp; 1556 mac_capab_vrrp_t vrrp_capab; 1557 uint8_t *ptr; 1558 queue_t *q = dsp->ds_wq; 1559 mblk_t *mp1; 1560 boolean_t is_vlan; 1561 boolean_t hcksum_capable = B_FALSE; 1562 boolean_t zcopy_capable = B_FALSE; 1563 boolean_t dld_capable = B_FALSE; 1564 boolean_t vrrp_capable = B_FALSE; 1565 1566 /* 1567 * Initially assume no capabilities. 1568 */ 1569 subsize = 0; 1570 is_vlan = (mac_client_vid(dsp->ds_mch) != VLAN_ID_NONE); 1571 1572 /* 1573 * Check if checksum offload is supported on this MAC. Don't 1574 * advertise DL_CAPAB_HCKSUM if the underlying MAC is VLAN incapable, 1575 * since it might not be able to do the hardware checksum offload 1576 * with the correct offset. 1577 */ 1578 bzero(&hcksum, sizeof (dl_capab_hcksum_t)); 1579 if ((!is_vlan || (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_NATIVEVLAN, 1580 NULL))) && mac_capab_get(dsp->ds_mh, MAC_CAPAB_HCKSUM, 1581 &hcksum.hcksum_txflags)) { 1582 if (hcksum.hcksum_txflags != 0) { 1583 hcksum_capable = B_TRUE; 1584 subsize += sizeof (dl_capability_sub_t) + 1585 sizeof (dl_capab_hcksum_t); 1586 } 1587 } 1588 1589 /* 1590 * Check if zerocopy is supported on this interface. 1591 * If advertising DL_CAPAB_ZEROCOPY has not been explicitly disabled 1592 * then reserve space for that capability. 1593 */ 1594 if (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_ZCOPY, NULL) && 1595 !(dld_opt & DLD_OPT_NO_ZEROCOPY)) { 1596 zcopy_capable = B_TRUE; 1597 subsize += sizeof (dl_capability_sub_t) + 1598 sizeof (dl_capab_zerocopy_t); 1599 } 1600 1601 /* 1602 * Direct capability negotiation interface between IP and DLD 1603 */ 1604 if (dsp->ds_sap == ETHERTYPE_IP && check_mod_above(dsp->ds_rq, "ip")) { 1605 dld_capable = B_TRUE; 1606 subsize += sizeof (dl_capability_sub_t) + 1607 sizeof (dl_capab_dld_t); 1608 } 1609 1610 /* 1611 * Check if vrrp is supported on this interface. If so, reserve 1612 * space for that capability. 1613 */ 1614 if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_VRRP, &vrrp_capab)) { 1615 vrrp_capable = B_TRUE; 1616 subsize += sizeof (dl_capability_sub_t) + 1617 sizeof (dl_capab_vrrp_t); 1618 } 1619 1620 /* 1621 * If there are no capabilities to advertise or if we 1622 * can't allocate a response, send a DL_ERROR_ACK. 1623 */ 1624 if ((mp1 = reallocb(mp, 1625 sizeof (dl_capability_ack_t) + subsize, 0)) == NULL) { 1626 dlerrorack(q, mp, DL_CAPABILITY_REQ, DL_NOTSUPPORTED, 0); 1627 return; 1628 } 1629 1630 mp = mp1; 1631 DB_TYPE(mp) = M_PROTO; 1632 mp->b_wptr = mp->b_rptr + sizeof (dl_capability_ack_t) + subsize; 1633 bzero(mp->b_rptr, MBLKL(mp)); 1634 dlap = (dl_capability_ack_t *)mp->b_rptr; 1635 dlap->dl_primitive = DL_CAPABILITY_ACK; 1636 dlap->dl_sub_offset = sizeof (dl_capability_ack_t); 1637 dlap->dl_sub_length = subsize; 1638 ptr = (uint8_t *)&dlap[1]; 1639 1640 /* 1641 * TCP/IP checksum offload. 1642 */ 1643 if (hcksum_capable) { 1644 dlsp = (dl_capability_sub_t *)ptr; 1645 1646 dlsp->dl_cap = DL_CAPAB_HCKSUM; 1647 dlsp->dl_length = sizeof (dl_capab_hcksum_t); 1648 ptr += sizeof (dl_capability_sub_t); 1649 1650 hcksum.hcksum_version = HCKSUM_VERSION_1; 1651 dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); 1652 bcopy(&hcksum, ptr, sizeof (dl_capab_hcksum_t)); 1653 ptr += sizeof (dl_capab_hcksum_t); 1654 } 1655 1656 /* 1657 * Zero copy 1658 */ 1659 if (zcopy_capable) { 1660 dlsp = (dl_capability_sub_t *)ptr; 1661 1662 dlsp->dl_cap = DL_CAPAB_ZEROCOPY; 1663 dlsp->dl_length = sizeof (dl_capab_zerocopy_t); 1664 ptr += sizeof (dl_capability_sub_t); 1665 1666 bzero(&zcopy, sizeof (dl_capab_zerocopy_t)); 1667 zcopy.zerocopy_version = ZEROCOPY_VERSION_1; 1668 zcopy.zerocopy_flags = DL_CAPAB_VMSAFE_MEM; 1669 1670 dlcapabsetqid(&(zcopy.zerocopy_mid), dsp->ds_rq); 1671 bcopy(&zcopy, ptr, sizeof (dl_capab_zerocopy_t)); 1672 ptr += sizeof (dl_capab_zerocopy_t); 1673 } 1674 1675 /* 1676 * VRRP capability negotiation 1677 */ 1678 if (vrrp_capable) { 1679 dlsp = (dl_capability_sub_t *)ptr; 1680 dlsp->dl_cap = DL_CAPAB_VRRP; 1681 dlsp->dl_length = sizeof (dl_capab_vrrp_t); 1682 ptr += sizeof (dl_capability_sub_t); 1683 1684 bzero(&vrrp, sizeof (dl_capab_vrrp_t)); 1685 vrrp.vrrp_af = vrrp_capab.mcv_af; 1686 bcopy(&vrrp, ptr, sizeof (dl_capab_vrrp_t)); 1687 ptr += sizeof (dl_capab_vrrp_t); 1688 } 1689 1690 /* 1691 * Direct capability negotiation interface between IP and DLD. 1692 * Refer to dld.h for details. 1693 */ 1694 if (dld_capable) { 1695 dlsp = (dl_capability_sub_t *)ptr; 1696 dlsp->dl_cap = DL_CAPAB_DLD; 1697 dlsp->dl_length = sizeof (dl_capab_dld_t); 1698 ptr += sizeof (dl_capability_sub_t); 1699 1700 bzero(&dld, sizeof (dl_capab_dld_t)); 1701 dld.dld_version = DLD_CURRENT_VERSION; 1702 dld.dld_capab = (uintptr_t)dld_capab; 1703 dld.dld_capab_handle = (uintptr_t)dsp; 1704 1705 dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); 1706 bcopy(&dld, ptr, sizeof (dl_capab_dld_t)); 1707 ptr += sizeof (dl_capab_dld_t); 1708 } 1709 1710 ASSERT(ptr == mp->b_rptr + sizeof (dl_capability_ack_t) + subsize); 1711 qreply(q, mp); 1712 } 1713 1714 /* 1715 * Disable any enabled capabilities. 1716 */ 1717 void 1718 dld_capabilities_disable(dld_str_t *dsp) 1719 { 1720 if (dsp->ds_polling) 1721 (void) dld_capab_poll_disable(dsp, NULL); 1722 } 1723