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) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2017, Joyent, Inc. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/callb.h> 28 #include <sys/cpupart.h> 29 #include <sys/pool.h> 30 #include <sys/pool_pset.h> 31 #include <sys/sdt.h> 32 #include <sys/strsubr.h> 33 #include <sys/strsun.h> 34 #include <sys/vlan.h> 35 #include <inet/ipsec_impl.h> 36 #include <inet/ip_impl.h> 37 #include <inet/sadb.h> 38 #include <inet/ipsecesp.h> 39 #include <inet/ipsecah.h> 40 41 #include <sys/mac_impl.h> 42 #include <sys/mac_client_impl.h> 43 #include <sys/mac_client_priv.h> 44 #include <sys/mac_soft_ring.h> 45 #include <sys/mac_flow_impl.h> 46 #include <sys/mac_stat.h> 47 48 static void mac_srs_soft_rings_signal(mac_soft_ring_set_t *, uint_t); 49 static void mac_srs_update_fanout_list(mac_soft_ring_set_t *); 50 static void mac_srs_poll_unbind(mac_soft_ring_set_t *); 51 static void mac_srs_worker_unbind(mac_soft_ring_set_t *); 52 static void mac_srs_soft_rings_quiesce(mac_soft_ring_set_t *, uint_t); 53 54 static int mac_srs_cpu_setup(cpu_setup_t, int, void *); 55 static void mac_srs_worker_bind(mac_soft_ring_set_t *, processorid_t); 56 static void mac_srs_poll_bind(mac_soft_ring_set_t *, processorid_t); 57 static void mac_srs_threads_unbind(mac_soft_ring_set_t *); 58 static void mac_srs_add_glist(mac_soft_ring_set_t *); 59 static void mac_srs_remove_glist(mac_soft_ring_set_t *); 60 static void mac_srs_fanout_list_free(mac_soft_ring_set_t *); 61 static void mac_soft_ring_remove(mac_soft_ring_set_t *, mac_soft_ring_t *); 62 63 static int mac_compute_soft_ring_count(flow_entry_t *, int, int); 64 static void mac_walk_srs_and_bind(int); 65 static void mac_walk_srs_and_unbind(int); 66 67 extern boolean_t mac_latency_optimize; 68 69 static kmem_cache_t *mac_srs_cache; 70 kmem_cache_t *mac_soft_ring_cache; 71 72 /* 73 * The duration in msec we wait before signalling the soft ring 74 * worker thread in case packets get queued. 75 */ 76 uint32_t mac_soft_ring_worker_wait = 0; 77 78 /* 79 * A global tunable for turning polling on/off. By default, dynamic 80 * polling is always on and is always very beneficial. It should be 81 * turned off with absolute care and for the rare workload (very 82 * low latency sensitive traffic). 83 */ 84 int mac_poll_enable = B_TRUE; 85 86 /* 87 * Need to set mac_soft_ring_max_q_cnt based on bandwidth and perhaps latency. 88 * Large values could end up in consuming lot of system memory and cause 89 * system hang. 90 */ 91 int mac_soft_ring_max_q_cnt = 1024; 92 int mac_soft_ring_min_q_cnt = 256; 93 int mac_soft_ring_poll_thres = 16; 94 95 boolean_t mac_tx_serialize = B_FALSE; 96 97 /* 98 * mac_tx_srs_hiwat is the queue depth threshold at which callers of 99 * mac_tx() will be notified of flow control condition. 100 * 101 * TCP does not honour flow control condition sent up by mac_tx(). 102 * Thus provision is made for TCP to allow more packets to be queued 103 * in SRS upto a maximum of mac_tx_srs_max_q_cnt. 104 * 105 * Note that mac_tx_srs_hiwat is always be lesser than 106 * mac_tx_srs_max_q_cnt. 107 */ 108 uint32_t mac_tx_srs_max_q_cnt = 100000; 109 uint32_t mac_tx_srs_hiwat = 1000; 110 111 /* 112 * mac_rx_soft_ring_count, mac_soft_ring_10gig_count: 113 * 114 * Global tunables that determines the number of soft rings to be used for 115 * fanning out incoming traffic on a link. These count will be used only 116 * when no explicit set of CPUs was assigned to the data-links. 117 * 118 * mac_rx_soft_ring_count tunable will come into effect only if 119 * mac_soft_ring_enable is set. mac_soft_ring_enable is turned on by 120 * default only for sun4v platforms. 121 * 122 * mac_rx_soft_ring_10gig_count will come into effect if you are running on a 123 * 10Gbps link and is not dependent upon mac_soft_ring_enable. 124 * 125 * The number of soft rings for fanout for a link or a flow is determined 126 * by mac_compute_soft_ring_count() routine. This routine will take into 127 * account mac_soft_ring_enable, mac_rx_soft_ring_count and 128 * mac_rx_soft_ring_10gig_count to determine the soft ring count for a link. 129 * 130 * If a bandwidth is specified, the determination of the number of soft 131 * rings is based on specified bandwidth, CPU speed and number of CPUs in 132 * the system. 133 */ 134 uint_t mac_rx_soft_ring_count = 8; 135 uint_t mac_rx_soft_ring_10gig_count = 8; 136 137 /* 138 * Every Tx and Rx mac_soft_ring_set_t (mac_srs) created gets added 139 * to mac_srs_g_list and mac_srs_g_lock protects mac_srs_g_list. The 140 * list is used to walk the list of all MAC threads when a CPU is 141 * coming online or going offline. 142 */ 143 static mac_soft_ring_set_t *mac_srs_g_list = NULL; 144 static krwlock_t mac_srs_g_lock; 145 146 /* 147 * Whether the SRS threads should be bound, or not. 148 */ 149 boolean_t mac_srs_thread_bind = B_TRUE; 150 151 /* 152 * Whether Rx/Tx interrupts should be re-targeted. Disabled by default. 153 * dladm command would override this. 154 */ 155 boolean_t mac_tx_intr_retarget = B_FALSE; 156 boolean_t mac_rx_intr_retarget = B_FALSE; 157 158 /* 159 * If cpu bindings are specified by user, then Tx SRS and its soft 160 * rings should also be bound to the CPUs specified by user. The 161 * CPUs for Tx bindings are at the end of the cpu list provided by 162 * the user. If enough CPUs are not available (for Tx and Rx 163 * SRSes), then the CPUs are shared by both Tx and Rx SRSes. 164 */ 165 #define BIND_TX_SRS_AND_SOFT_RINGS(mac_tx_srs, mrp) { \ 166 processorid_t cpuid; \ 167 int i; \ 168 mac_soft_ring_t *softring; \ 169 mac_cpus_t *srs_cpu; \ 170 \ 171 srs_cpu = &mac_tx_srs->srs_cpu; \ 172 cpuid = srs_cpu->mc_tx_fanout_cpus[0]; \ 173 mac_srs_worker_bind(mac_tx_srs, cpuid); \ 174 if (MAC_TX_SOFT_RINGS(mac_tx_srs)) { \ 175 for (i = 0; i < mac_tx_srs->srs_tx_ring_count; i++) { \ 176 cpuid = srs_cpu->mc_tx_fanout_cpus[i]; \ 177 softring = mac_tx_srs->srs_tx_soft_rings[i]; \ 178 if (cpuid != -1) { \ 179 (void) mac_soft_ring_bind(softring, \ 180 cpuid); \ 181 } \ 182 } \ 183 } \ 184 } 185 186 /* 187 * Re-targeting is allowed only for exclusive group or for primary. 188 */ 189 #define RETARGETABLE_CLIENT(group, mcip) \ 190 ((((group) != NULL) && \ 191 ((group)->mrg_state == MAC_GROUP_STATE_RESERVED)) || \ 192 mac_is_primary_client(mcip)) 193 194 #define MAC_RING_RETARGETABLE(ring) \ 195 (((ring) != NULL) && \ 196 ((ring)->mr_info.mri_intr.mi_ddi_handle != NULL) && \ 197 !((ring)->mr_info.mri_intr.mi_ddi_shared)) 198 199 200 /* INIT and FINI ROUTINES */ 201 202 void 203 mac_soft_ring_init(void) 204 { 205 mac_soft_ring_cache = kmem_cache_create("mac_soft_ring_cache", 206 sizeof (mac_soft_ring_t), 64, NULL, NULL, NULL, NULL, NULL, 0); 207 208 mac_srs_cache = kmem_cache_create("mac_srs_cache", 209 sizeof (mac_soft_ring_set_t), 210 64, NULL, NULL, NULL, NULL, NULL, 0); 211 212 rw_init(&mac_srs_g_lock, NULL, RW_DEFAULT, NULL); 213 mutex_enter(&cpu_lock); 214 register_cpu_setup_func(mac_srs_cpu_setup, NULL); 215 mutex_exit(&cpu_lock); 216 } 217 218 void 219 mac_soft_ring_finish(void) 220 { 221 mutex_enter(&cpu_lock); 222 unregister_cpu_setup_func(mac_srs_cpu_setup, NULL); 223 mutex_exit(&cpu_lock); 224 rw_destroy(&mac_srs_g_lock); 225 kmem_cache_destroy(mac_soft_ring_cache); 226 kmem_cache_destroy(mac_srs_cache); 227 } 228 229 static void 230 mac_srs_soft_rings_free(mac_soft_ring_set_t *mac_srs) 231 { 232 mac_soft_ring_t *softring, *next, *head; 233 234 /* 235 * Synchronize with mac_walk_srs_bind/unbind which are callbacks from 236 * DR. The callbacks from DR are called with cpu_lock held, and hence 237 * can't wait to grab the mac perimeter. The soft ring list is hence 238 * protected for read access by srs_lock. Changing the soft ring list 239 * needs the mac perimeter and the srs_lock. 240 */ 241 mutex_enter(&mac_srs->srs_lock); 242 243 head = mac_srs->srs_soft_ring_head; 244 mac_srs->srs_soft_ring_head = NULL; 245 mac_srs->srs_soft_ring_tail = NULL; 246 mac_srs->srs_soft_ring_count = 0; 247 248 mutex_exit(&mac_srs->srs_lock); 249 250 for (softring = head; softring != NULL; softring = next) { 251 next = softring->s_ring_next; 252 mac_soft_ring_free(softring); 253 } 254 } 255 256 static void 257 mac_srs_add_glist(mac_soft_ring_set_t *mac_srs) 258 { 259 ASSERT(mac_srs->srs_next == NULL && mac_srs->srs_prev == NULL); 260 ASSERT(MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 261 262 rw_enter(&mac_srs_g_lock, RW_WRITER); 263 mutex_enter(&mac_srs->srs_lock); 264 265 ASSERT((mac_srs->srs_state & SRS_IN_GLIST) == 0); 266 267 if (mac_srs_g_list == NULL) { 268 mac_srs_g_list = mac_srs; 269 } else { 270 mac_srs->srs_next = mac_srs_g_list; 271 mac_srs_g_list->srs_prev = mac_srs; 272 mac_srs->srs_prev = NULL; 273 mac_srs_g_list = mac_srs; 274 } 275 mac_srs->srs_state |= SRS_IN_GLIST; 276 277 mutex_exit(&mac_srs->srs_lock); 278 rw_exit(&mac_srs_g_lock); 279 } 280 281 static void 282 mac_srs_remove_glist(mac_soft_ring_set_t *mac_srs) 283 { 284 ASSERT(MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 285 286 rw_enter(&mac_srs_g_lock, RW_WRITER); 287 mutex_enter(&mac_srs->srs_lock); 288 289 ASSERT((mac_srs->srs_state & SRS_IN_GLIST) != 0); 290 291 if (mac_srs == mac_srs_g_list) { 292 mac_srs_g_list = mac_srs->srs_next; 293 if (mac_srs_g_list != NULL) 294 mac_srs_g_list->srs_prev = NULL; 295 } else { 296 mac_srs->srs_prev->srs_next = mac_srs->srs_next; 297 if (mac_srs->srs_next != NULL) 298 mac_srs->srs_next->srs_prev = mac_srs->srs_prev; 299 } 300 mac_srs->srs_state &= ~SRS_IN_GLIST; 301 302 mutex_exit(&mac_srs->srs_lock); 303 rw_exit(&mac_srs_g_lock); 304 } 305 306 /* POLLING SETUP AND TEAR DOWN ROUTINES */ 307 308 /* 309 * mac_srs_client_poll_quiesce and mac_srs_client_poll_restart 310 * 311 * These routines are used to call back into the upper layer 312 * (primarily TCP squeue) to stop polling the soft rings or 313 * restart polling. 314 */ 315 void 316 mac_srs_client_poll_quiesce(mac_client_impl_t *mcip, 317 mac_soft_ring_set_t *mac_srs) 318 { 319 mac_soft_ring_t *softring; 320 321 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 322 323 if (!(mac_srs->srs_type & SRST_CLIENT_POLL_ENABLED)) { 324 ASSERT(!(mac_srs->srs_type & SRST_DLS_BYPASS)); 325 return; 326 } 327 328 for (softring = mac_srs->srs_soft_ring_head; 329 softring != NULL; softring = softring->s_ring_next) { 330 if ((softring->s_ring_type & ST_RING_TCP) && 331 (softring->s_ring_rx_arg2 != NULL)) { 332 mcip->mci_resource_quiesce(mcip->mci_resource_arg, 333 softring->s_ring_rx_arg2); 334 } 335 } 336 } 337 338 void 339 mac_srs_client_poll_restart(mac_client_impl_t *mcip, 340 mac_soft_ring_set_t *mac_srs) 341 { 342 mac_soft_ring_t *softring; 343 344 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 345 346 if (!(mac_srs->srs_type & SRST_CLIENT_POLL_ENABLED)) { 347 ASSERT(!(mac_srs->srs_type & SRST_DLS_BYPASS)); 348 return; 349 } 350 351 for (softring = mac_srs->srs_soft_ring_head; 352 softring != NULL; softring = softring->s_ring_next) { 353 if ((softring->s_ring_type & ST_RING_TCP) && 354 (softring->s_ring_rx_arg2 != NULL)) { 355 mcip->mci_resource_restart(mcip->mci_resource_arg, 356 softring->s_ring_rx_arg2); 357 } 358 } 359 } 360 361 /* 362 * Register the given SRS and associated soft rings with the consumer and 363 * enable the polling interface used by the consumer.(i.e IP) over this 364 * SRS and associated soft rings. 365 */ 366 void 367 mac_srs_client_poll_enable(mac_client_impl_t *mcip, 368 mac_soft_ring_set_t *mac_srs) 369 { 370 mac_rx_fifo_t mrf; 371 mac_soft_ring_t *softring; 372 373 ASSERT(mac_srs->srs_mcip == mcip); 374 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 375 376 if (!(mcip->mci_state_flags & MCIS_CLIENT_POLL_CAPABLE)) 377 return; 378 379 bzero(&mrf, sizeof (mac_rx_fifo_t)); 380 mrf.mrf_type = MAC_RX_FIFO; 381 382 /* 383 * A SRS is capable of acting as a soft ring for cases 384 * where no fanout is needed. This is the case for userland 385 * flows. 386 */ 387 if (mac_srs->srs_type & SRST_NO_SOFT_RINGS) 388 return; 389 390 mrf.mrf_receive = (mac_receive_t)mac_soft_ring_poll; 391 mrf.mrf_intr_enable = (mac_intr_enable_t)mac_soft_ring_intr_enable; 392 mrf.mrf_intr_disable = (mac_intr_disable_t)mac_soft_ring_intr_disable; 393 mac_srs->srs_type |= SRST_CLIENT_POLL_ENABLED; 394 395 softring = mac_srs->srs_soft_ring_head; 396 while (softring != NULL) { 397 if (softring->s_ring_type & (ST_RING_TCP | ST_RING_UDP)) { 398 /* 399 * TCP and UDP support DLS bypass. Squeue polling 400 * support implies DLS bypass since the squeue poll 401 * path does not have DLS processing. 402 */ 403 mac_soft_ring_dls_bypass(softring, 404 mcip->mci_direct_rx_fn, mcip->mci_direct_rx_arg); 405 } 406 /* 407 * Non-TCP protocols don't support squeues. Hence we don't 408 * make any ring addition callbacks for non-TCP rings 409 */ 410 if (!(softring->s_ring_type & ST_RING_TCP)) { 411 softring->s_ring_rx_arg2 = NULL; 412 softring = softring->s_ring_next; 413 continue; 414 } 415 mrf.mrf_rx_arg = softring; 416 mrf.mrf_intr_handle = (mac_intr_handle_t)softring; 417 mrf.mrf_cpu_id = softring->s_ring_cpuid; 418 mrf.mrf_flow_priority = mac_srs->srs_pri; 419 420 softring->s_ring_rx_arg2 = mcip->mci_resource_add( 421 mcip->mci_resource_arg, (mac_resource_t *)&mrf); 422 423 softring = softring->s_ring_next; 424 } 425 } 426 427 /* 428 * Unregister the given SRS and associated soft rings with the consumer and 429 * disable the polling interface used by the consumer.(i.e IP) over this 430 * SRS and associated soft rings. 431 */ 432 void 433 mac_srs_client_poll_disable(mac_client_impl_t *mcip, 434 mac_soft_ring_set_t *mac_srs) 435 { 436 mac_soft_ring_t *softring; 437 438 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 439 440 /* 441 * A SRS is capable of acting as a soft ring for cases 442 * where no protocol fanout is needed. This is the case 443 * for userland flows. Nothing to do here. 444 */ 445 if (mac_srs->srs_type & SRST_NO_SOFT_RINGS) 446 return; 447 448 mutex_enter(&mac_srs->srs_lock); 449 if (!(mac_srs->srs_type & SRST_CLIENT_POLL_ENABLED)) { 450 ASSERT(!(mac_srs->srs_type & SRST_DLS_BYPASS)); 451 mutex_exit(&mac_srs->srs_lock); 452 return; 453 } 454 mac_srs->srs_type &= ~(SRST_CLIENT_POLL_ENABLED | SRST_DLS_BYPASS); 455 mutex_exit(&mac_srs->srs_lock); 456 457 /* 458 * DLS bypass is now disabled in the case of both TCP and UDP. 459 * Reset the soft ring callbacks to the standard 'mac_rx_deliver' 460 * callback. In addition, in the case of TCP, invoke IP's callback 461 * for ring removal. 462 */ 463 for (softring = mac_srs->srs_soft_ring_head; 464 softring != NULL; softring = softring->s_ring_next) { 465 if (!(softring->s_ring_type & (ST_RING_UDP | ST_RING_TCP))) 466 continue; 467 468 if ((softring->s_ring_type & ST_RING_TCP) && 469 softring->s_ring_rx_arg2 != NULL) { 470 mcip->mci_resource_remove(mcip->mci_resource_arg, 471 softring->s_ring_rx_arg2); 472 } 473 474 mutex_enter(&softring->s_ring_lock); 475 while (softring->s_ring_state & S_RING_PROC) { 476 softring->s_ring_state |= S_RING_CLIENT_WAIT; 477 cv_wait(&softring->s_ring_client_cv, 478 &softring->s_ring_lock); 479 } 480 softring->s_ring_state &= ~S_RING_CLIENT_WAIT; 481 softring->s_ring_rx_arg2 = NULL; 482 softring->s_ring_rx_func = mac_rx_deliver; 483 softring->s_ring_rx_arg1 = mcip; 484 mutex_exit(&softring->s_ring_lock); 485 } 486 } 487 488 /* 489 * Enable or disable poll capability of the SRS on the underlying Rx ring. 490 * 491 * There is a need to enable or disable the poll capability of an SRS over an 492 * Rx ring depending on the number of mac clients sharing the ring and also 493 * whether user flows are configured on it. However the poll state is actively 494 * manipulated by the SRS worker and poll threads and uncoordinated changes by 495 * yet another thread to the underlying capability can surprise them leading 496 * to assert failures. Instead we quiesce the SRS, make the changes and then 497 * restart the SRS. 498 */ 499 static void 500 mac_srs_poll_state_change(mac_soft_ring_set_t *mac_srs, 501 boolean_t turn_off_poll_capab, mac_rx_func_t rx_func) 502 { 503 boolean_t need_restart = B_FALSE; 504 mac_srs_rx_t *srs_rx = &mac_srs->srs_rx; 505 mac_ring_t *ring; 506 507 if (!SRS_QUIESCED(mac_srs)) { 508 mac_rx_srs_quiesce(mac_srs, SRS_QUIESCE); 509 need_restart = B_TRUE; 510 } 511 512 ring = mac_srs->srs_ring; 513 if ((ring != NULL) && 514 (ring->mr_classify_type == MAC_HW_CLASSIFIER)) { 515 if (turn_off_poll_capab) 516 mac_srs->srs_state &= ~SRS_POLLING_CAPAB; 517 else if (mac_poll_enable) 518 mac_srs->srs_state |= SRS_POLLING_CAPAB; 519 } 520 srs_rx->sr_lower_proc = rx_func; 521 522 if (need_restart) 523 mac_rx_srs_restart(mac_srs); 524 } 525 526 /* CPU RECONFIGURATION AND FANOUT COMPUTATION ROUTINES */ 527 528 /* 529 * Return the next CPU to be used to bind a MAC kernel thread. 530 * If a cpupart is specified, the cpu chosen must be from that 531 * cpu partition. 532 */ 533 static processorid_t 534 mac_next_bind_cpu(cpupart_t *cpupart) 535 { 536 static cpu_t *cp = NULL; 537 cpu_t *cp_start; 538 539 ASSERT(MUTEX_HELD(&cpu_lock)); 540 541 if (cp == NULL) 542 cp = cpu_list; 543 544 cp = cp->cpu_next_onln; 545 cp_start = cp; 546 547 do { 548 if ((cpupart == NULL) || (cp->cpu_part == cpupart)) 549 return (cp->cpu_id); 550 551 } while ((cp = cp->cpu_next_onln) != cp_start); 552 553 return (NULL); 554 } 555 556 /* ARGSUSED */ 557 static int 558 mac_srs_cpu_setup(cpu_setup_t what, int id, void *arg) 559 { 560 ASSERT(MUTEX_HELD(&cpu_lock)); 561 switch (what) { 562 case CPU_CONFIG: 563 case CPU_ON: 564 case CPU_CPUPART_IN: 565 mac_walk_srs_and_bind(id); 566 break; 567 568 case CPU_UNCONFIG: 569 case CPU_OFF: 570 case CPU_CPUPART_OUT: 571 mac_walk_srs_and_unbind(id); 572 break; 573 574 default: 575 break; 576 } 577 return (0); 578 } 579 580 /* 581 * mac_compute_soft_ring_count(): 582 * 583 * This routine computes the number of soft rings needed to handle incoming 584 * load given a flow_entry. 585 * 586 * The routine does the following: 587 * 1) soft rings will be created if mac_soft_ring_enable is set. 588 * 2) If the underlying link is a 10Gbps link, then soft rings will be 589 * created even if mac_soft_ring_enable is not set. The number of soft 590 * rings, so created, will equal mac_rx_soft_ring_10gig_count. 591 * 3) On a sun4v platform (i.e., mac_soft_ring_enable is set), 2 times the 592 * mac_rx_soft_ring_10gig_count number of soft rings will be created for a 593 * 10Gbps link. 594 * 595 * If a bandwidth limit is specified, the number that gets computed is 596 * dependent upon CPU speed, the number of Rx rings configured, and 597 * the bandwidth limit. 598 * If more Rx rings are available, less number of soft rings is needed. 599 * 600 * mac_use_bw_heuristic is another "hidden" variable that can be used to 601 * override the default use of soft ring count computation. Depending upon 602 * the usefulness of it, mac_use_bw_heuristic can later be made into a 603 * data-link property or removed altogether. 604 * 605 * TODO: Cleanup and tighten some of the assumptions. 606 */ 607 boolean_t mac_use_bw_heuristic = B_TRUE; 608 static int 609 mac_compute_soft_ring_count(flow_entry_t *flent, int rx_srs_cnt, int maxcpus) 610 { 611 uint64_t cpu_speed, bw = 0; 612 int srings = 0; 613 boolean_t bw_enabled = B_FALSE; 614 615 ASSERT(!(flent->fe_type & FLOW_USER)); 616 if (flent->fe_resource_props.mrp_mask & MRP_MAXBW && 617 mac_use_bw_heuristic) { 618 /* bandwidth enabled */ 619 bw_enabled = B_TRUE; 620 bw = flent->fe_resource_props.mrp_maxbw; 621 } 622 if (!bw_enabled) { 623 /* No bandwidth enabled */ 624 if (mac_soft_ring_enable) 625 srings = mac_rx_soft_ring_count; 626 627 /* Is this a 10Gig link? */ 628 flent->fe_nic_speed = mac_client_stat_get(flent->fe_mcip, 629 MAC_STAT_IFSPEED); 630 /* convert to Mbps */ 631 if (((flent->fe_nic_speed)/1000000) > 1000 && 632 mac_rx_soft_ring_10gig_count > 0) { 633 /* This is a 10Gig link */ 634 srings = mac_rx_soft_ring_10gig_count; 635 /* 636 * Use 2 times mac_rx_soft_ring_10gig_count for 637 * sun4v systems. 638 */ 639 if (mac_soft_ring_enable) 640 srings = srings * 2; 641 } 642 } else { 643 /* 644 * Soft ring computation using CPU speed and specified 645 * bandwidth limit. 646 */ 647 /* Assumption: all CPUs have the same frequency */ 648 cpu_speed = (uint64_t)CPU->cpu_type_info.pi_clock; 649 650 /* cpu_speed is in MHz; make bw in units of Mbps. */ 651 bw = bw/1000000; 652 653 if (bw >= 1000) { 654 /* 655 * bw is greater than or equal to 1Gbps. 656 * The number of soft rings required is a function 657 * of bandwidth and CPU speed. To keep this simple, 658 * let's use this rule: 1GHz CPU can handle 1Gbps. 659 * If bw is less than 1 Gbps, then there is no need 660 * for soft rings. Assumption is that CPU speeds 661 * (on modern systems) are at least 1GHz. 662 */ 663 srings = bw/cpu_speed; 664 if (srings <= 1 && mac_soft_ring_enable) { 665 /* 666 * Give at least 2 soft rings 667 * for sun4v systems 668 */ 669 srings = 2; 670 } 671 } 672 } 673 /* 674 * If the flent has multiple Rx SRSs, then each SRS need not 675 * have that many soft rings on top of it. The number of 676 * soft rings for each Rx SRS is found by dividing srings by 677 * rx_srs_cnt. 678 */ 679 if (rx_srs_cnt > 1) { 680 int remainder; 681 682 remainder = srings%rx_srs_cnt; 683 srings = srings/rx_srs_cnt; 684 if (remainder != 0) 685 srings++; 686 /* 687 * Fanning out to 1 soft ring is not very useful. 688 * Set it as well to 0 and mac_srs_fanout_init() 689 * will take care of creating a single soft ring 690 * for proto fanout. 691 */ 692 if (srings == 1) 693 srings = 0; 694 } 695 /* Do some more massaging */ 696 srings = min(srings, maxcpus); 697 srings = min(srings, MAX_SR_FANOUT); 698 return (srings); 699 } 700 701 /* 702 * mac_tx_cpu_init: 703 * set up CPUs for Tx interrupt re-targeting and Tx worker 704 * thread binding 705 */ 706 static void 707 mac_tx_cpu_init(flow_entry_t *flent, mac_resource_props_t *mrp, 708 cpupart_t *cpupart) 709 { 710 mac_soft_ring_set_t *tx_srs = flent->fe_tx_srs; 711 mac_srs_tx_t *srs_tx = &tx_srs->srs_tx; 712 mac_cpus_t *srs_cpu = &tx_srs->srs_cpu; 713 mac_soft_ring_t *sringp; 714 mac_ring_t *ring; 715 processorid_t worker_cpuid; 716 boolean_t retargetable_client = B_FALSE; 717 int i, j; 718 719 if (RETARGETABLE_CLIENT((mac_group_t *)flent->fe_tx_ring_group, 720 flent->fe_mcip)) { 721 retargetable_client = B_TRUE; 722 } 723 724 if (MAC_TX_SOFT_RINGS(tx_srs)) { 725 if (mrp != NULL) 726 j = mrp->mrp_ncpus - 1; 727 for (i = 0; i < tx_srs->srs_tx_ring_count; i++) { 728 if (mrp != NULL) { 729 if (j < 0) 730 j = mrp->mrp_ncpus - 1; 731 worker_cpuid = mrp->mrp_cpu[j]; 732 } else { 733 /* 734 * Bind interrupt to the next CPU available 735 * and leave the worker unbound. 736 */ 737 worker_cpuid = -1; 738 } 739 sringp = tx_srs->srs_tx_soft_rings[i]; 740 ring = (mac_ring_t *)sringp->s_ring_tx_arg2; 741 srs_cpu->mc_tx_fanout_cpus[i] = worker_cpuid; 742 if (MAC_RING_RETARGETABLE(ring) && 743 retargetable_client) { 744 mutex_enter(&cpu_lock); 745 srs_cpu->mc_tx_intr_cpu[i] = 746 (mrp != NULL) ? mrp->mrp_cpu[j] : 747 (mac_tx_intr_retarget ? 748 mac_next_bind_cpu(cpupart) : -1); 749 mutex_exit(&cpu_lock); 750 } else { 751 srs_cpu->mc_tx_intr_cpu[i] = -1; 752 } 753 if (mrp != NULL) 754 j--; 755 } 756 } else { 757 /* Tx mac_ring_handle_t is stored in st_arg2 */ 758 srs_cpu->mc_tx_fanout_cpus[0] = 759 (mrp != NULL) ? mrp->mrp_cpu[mrp->mrp_ncpus - 1] : -1; 760 ring = (mac_ring_t *)srs_tx->st_arg2; 761 if (MAC_RING_RETARGETABLE(ring) && retargetable_client) { 762 mutex_enter(&cpu_lock); 763 srs_cpu->mc_tx_intr_cpu[0] = (mrp != NULL) ? 764 mrp->mrp_cpu[mrp->mrp_ncpus - 1] : 765 (mac_tx_intr_retarget ? 766 mac_next_bind_cpu(cpupart) : -1); 767 mutex_exit(&cpu_lock); 768 } else { 769 srs_cpu->mc_tx_intr_cpu[0] = -1; 770 } 771 } 772 } 773 774 /* 775 * Assignment of user specified CPUs to a link. 776 * 777 * Minimum CPUs required to get an optimal assignmet: 778 * For each Rx SRS, atleast two CPUs are needed if mac_latency_optimize 779 * flag is set -- one for polling, one for fanout soft ring. 780 * If mac_latency_optimize is not set, then 3 CPUs are needed -- one 781 * for polling, one for SRS worker thread and one for fanout soft ring. 782 * 783 * The CPUs needed for Tx side is equal to the number of Tx rings 784 * the link is using. 785 * 786 * mac_flow_user_cpu_init() categorizes the CPU assignment depending 787 * upon the number of CPUs in 3 different buckets. 788 * 789 * In the first bucket, the most optimal case is handled. The user has 790 * passed enough number of CPUs and every thread gets its own CPU. 791 * 792 * The second and third are the sub-optimal cases. Enough CPUs are not 793 * available. 794 * 795 * The second bucket handles the case where atleast one distinct CPU is 796 * is available for each of the Rx rings (Rx SRSes) and Tx rings (Tx 797 * SRS or soft rings). 798 * 799 * In the third case (worst case scenario), specified CPU count is less 800 * than the Rx rings configured for the link. In this case, we round 801 * robin the CPUs among the Rx SRSes and Tx SRS/soft rings. 802 */ 803 static void 804 mac_flow_user_cpu_init(flow_entry_t *flent, mac_resource_props_t *mrp) 805 { 806 mac_soft_ring_set_t *rx_srs, *tx_srs; 807 int i, srs_cnt; 808 mac_cpus_t *srs_cpu; 809 int no_of_cpus, cpu_cnt; 810 int rx_srs_cnt, reqd_rx_cpu_cnt; 811 int fanout_cpu_cnt, reqd_tx_cpu_cnt; 812 int reqd_poll_worker_cnt, fanout_cnt_per_srs; 813 mac_resource_props_t *emrp = &flent->fe_effective_props; 814 815 ASSERT(mrp->mrp_fanout_mode == MCM_CPUS); 816 /* 817 * The check for nbc_ncpus to be within limits for 818 * the user specified case was done earlier and if 819 * not within limits, an error would have been 820 * returned to the user. 821 */ 822 ASSERT(mrp->mrp_ncpus > 0); 823 824 no_of_cpus = mrp->mrp_ncpus; 825 826 if (mrp->mrp_rx_intr_cpu != -1) { 827 /* 828 * interrupt has been re-targetted. Poll 829 * thread needs to be bound to interrupt 830 * CPU. 831 * 832 * Find where in the list is the intr 833 * CPU and swap it with the first one. 834 * We will be using the first CPU in the 835 * list for poll. 836 */ 837 for (i = 0; i < no_of_cpus; i++) { 838 if (mrp->mrp_cpu[i] == mrp->mrp_rx_intr_cpu) 839 break; 840 } 841 mrp->mrp_cpu[i] = mrp->mrp_cpu[0]; 842 mrp->mrp_cpu[0] = mrp->mrp_rx_intr_cpu; 843 } 844 845 /* 846 * Requirements: 847 * The number of CPUs that each Rx ring needs is dependent 848 * upon mac_latency_optimize flag. 849 * 1) If set, atleast 2 CPUs are needed -- one for 850 * polling, one for fanout soft ring. 851 * 2) If not set, then atleast 3 CPUs are needed -- one 852 * for polling, one for srs worker thread, and one for 853 * fanout soft ring. 854 */ 855 rx_srs_cnt = (flent->fe_rx_srs_cnt > 1) ? 856 (flent->fe_rx_srs_cnt - 1) : flent->fe_rx_srs_cnt; 857 reqd_rx_cpu_cnt = mac_latency_optimize ? 858 (rx_srs_cnt * 2) : (rx_srs_cnt * 3); 859 860 /* How many CPUs are needed for Tx side? */ 861 tx_srs = flent->fe_tx_srs; 862 reqd_tx_cpu_cnt = MAC_TX_SOFT_RINGS(tx_srs) ? 863 tx_srs->srs_tx_ring_count : 1; 864 865 /* CPUs needed for Rx SRSes poll and worker threads */ 866 reqd_poll_worker_cnt = mac_latency_optimize ? 867 rx_srs_cnt : rx_srs_cnt * 2; 868 869 /* Has the user provided enough CPUs? */ 870 if (no_of_cpus >= (reqd_rx_cpu_cnt + reqd_tx_cpu_cnt)) { 871 /* 872 * Best case scenario. There is enough CPUs. All 873 * Rx rings will get their own set of CPUs plus 874 * Tx soft rings will get their own. 875 */ 876 /* 877 * fanout_cpu_cnt is the number of CPUs available 878 * for Rx side fanout soft rings. 879 */ 880 fanout_cpu_cnt = no_of_cpus - 881 reqd_poll_worker_cnt - reqd_tx_cpu_cnt; 882 883 /* 884 * Divide fanout_cpu_cnt by rx_srs_cnt to find 885 * out how many fanout soft rings each Rx SRS 886 * can have. 887 */ 888 fanout_cnt_per_srs = fanout_cpu_cnt/rx_srs_cnt; 889 890 /* fanout_cnt_per_srs should not be > MAX_SR_FANOUT */ 891 fanout_cnt_per_srs = min(fanout_cnt_per_srs, MAX_SR_FANOUT); 892 893 /* Do the assignment for the default Rx ring */ 894 cpu_cnt = 0; 895 rx_srs = flent->fe_rx_srs[0]; 896 ASSERT(rx_srs->srs_ring == NULL); 897 if (rx_srs->srs_fanout_state == SRS_FANOUT_INIT) 898 rx_srs->srs_fanout_state = SRS_FANOUT_REINIT; 899 srs_cpu = &rx_srs->srs_cpu; 900 srs_cpu->mc_ncpus = no_of_cpus; 901 bcopy(mrp->mrp_cpu, 902 srs_cpu->mc_cpus, sizeof (srs_cpu->mc_cpus)); 903 srs_cpu->mc_rx_fanout_cnt = fanout_cnt_per_srs; 904 srs_cpu->mc_rx_pollid = mrp->mrp_cpu[cpu_cnt++]; 905 /* Retarget the interrupt to the same CPU as the poll */ 906 srs_cpu->mc_rx_intr_cpu = srs_cpu->mc_rx_pollid; 907 srs_cpu->mc_rx_workerid = (mac_latency_optimize ? 908 srs_cpu->mc_rx_pollid : mrp->mrp_cpu[cpu_cnt++]); 909 for (i = 0; i < fanout_cnt_per_srs; i++) 910 srs_cpu->mc_rx_fanout_cpus[i] = mrp->mrp_cpu[cpu_cnt++]; 911 912 /* Do the assignment for h/w Rx SRSes */ 913 if (flent->fe_rx_srs_cnt > 1) { 914 cpu_cnt = 0; 915 for (srs_cnt = 1; 916 srs_cnt < flent->fe_rx_srs_cnt; srs_cnt++) { 917 rx_srs = flent->fe_rx_srs[srs_cnt]; 918 ASSERT(rx_srs->srs_ring != NULL); 919 if (rx_srs->srs_fanout_state == 920 SRS_FANOUT_INIT) { 921 rx_srs->srs_fanout_state = 922 SRS_FANOUT_REINIT; 923 } 924 srs_cpu = &rx_srs->srs_cpu; 925 srs_cpu->mc_ncpus = no_of_cpus; 926 bcopy(mrp->mrp_cpu, srs_cpu->mc_cpus, 927 sizeof (srs_cpu->mc_cpus)); 928 srs_cpu->mc_rx_fanout_cnt = fanout_cnt_per_srs; 929 /* The first CPU in the list is the intr CPU */ 930 srs_cpu->mc_rx_pollid = mrp->mrp_cpu[cpu_cnt++]; 931 srs_cpu->mc_rx_intr_cpu = srs_cpu->mc_rx_pollid; 932 srs_cpu->mc_rx_workerid = 933 (mac_latency_optimize ? 934 srs_cpu->mc_rx_pollid : 935 mrp->mrp_cpu[cpu_cnt++]); 936 for (i = 0; i < fanout_cnt_per_srs; i++) { 937 srs_cpu->mc_rx_fanout_cpus[i] = 938 mrp->mrp_cpu[cpu_cnt++]; 939 } 940 ASSERT(cpu_cnt <= no_of_cpus); 941 } 942 } 943 goto tx_cpu_init; 944 } 945 946 /* 947 * Sub-optimal case. 948 * We have the following information: 949 * no_of_cpus - no. of cpus that user passed. 950 * rx_srs_cnt - no. of rx rings. 951 * reqd_rx_cpu_cnt = mac_latency_optimize?rx_srs_cnt*2:rx_srs_cnt*3 952 * reqd_tx_cpu_cnt - no. of cpus reqd. for Tx side. 953 * reqd_poll_worker_cnt = mac_latency_optimize?rx_srs_cnt:rx_srs_cnt*2 954 */ 955 /* 956 * If we bind the Rx fanout soft rings to the same CPUs 957 * as poll/worker, would that be enough? 958 */ 959 if (no_of_cpus >= (rx_srs_cnt + reqd_tx_cpu_cnt)) { 960 boolean_t worker_assign = B_FALSE; 961 962 /* 963 * If mac_latency_optimize is not set, are there 964 * enough CPUs to assign a CPU for worker also? 965 */ 966 if (no_of_cpus >= (reqd_poll_worker_cnt + reqd_tx_cpu_cnt)) 967 worker_assign = B_TRUE; 968 /* 969 * Zero'th Rx SRS is the default Rx ring. It is not 970 * associated with h/w Rx ring. 971 */ 972 rx_srs = flent->fe_rx_srs[0]; 973 ASSERT(rx_srs->srs_ring == NULL); 974 if (rx_srs->srs_fanout_state == SRS_FANOUT_INIT) 975 rx_srs->srs_fanout_state = SRS_FANOUT_REINIT; 976 cpu_cnt = 0; 977 srs_cpu = &rx_srs->srs_cpu; 978 srs_cpu->mc_ncpus = no_of_cpus; 979 bcopy(mrp->mrp_cpu, 980 srs_cpu->mc_cpus, sizeof (srs_cpu->mc_cpus)); 981 srs_cpu->mc_rx_fanout_cnt = 1; 982 srs_cpu->mc_rx_pollid = mrp->mrp_cpu[cpu_cnt++]; 983 /* Retarget the interrupt to the same CPU as the poll */ 984 srs_cpu->mc_rx_intr_cpu = srs_cpu->mc_rx_pollid; 985 srs_cpu->mc_rx_workerid = 986 ((!mac_latency_optimize && worker_assign) ? 987 mrp->mrp_cpu[cpu_cnt++] : srs_cpu->mc_rx_pollid); 988 989 srs_cpu->mc_rx_fanout_cpus[0] = mrp->mrp_cpu[cpu_cnt]; 990 991 /* Do CPU bindings for SRSes having h/w Rx rings */ 992 if (flent->fe_rx_srs_cnt > 1) { 993 cpu_cnt = 0; 994 for (srs_cnt = 1; 995 srs_cnt < flent->fe_rx_srs_cnt; srs_cnt++) { 996 rx_srs = flent->fe_rx_srs[srs_cnt]; 997 ASSERT(rx_srs->srs_ring != NULL); 998 if (rx_srs->srs_fanout_state == 999 SRS_FANOUT_INIT) { 1000 rx_srs->srs_fanout_state = 1001 SRS_FANOUT_REINIT; 1002 } 1003 srs_cpu = &rx_srs->srs_cpu; 1004 srs_cpu->mc_ncpus = no_of_cpus; 1005 bcopy(mrp->mrp_cpu, srs_cpu->mc_cpus, 1006 sizeof (srs_cpu->mc_cpus)); 1007 srs_cpu->mc_rx_pollid = 1008 mrp->mrp_cpu[cpu_cnt]; 1009 srs_cpu->mc_rx_intr_cpu = srs_cpu->mc_rx_pollid; 1010 srs_cpu->mc_rx_workerid = 1011 ((!mac_latency_optimize && worker_assign) ? 1012 mrp->mrp_cpu[++cpu_cnt] : 1013 srs_cpu->mc_rx_pollid); 1014 srs_cpu->mc_rx_fanout_cnt = 1; 1015 srs_cpu->mc_rx_fanout_cpus[0] = 1016 mrp->mrp_cpu[cpu_cnt]; 1017 cpu_cnt++; 1018 ASSERT(cpu_cnt <= no_of_cpus); 1019 } 1020 } 1021 goto tx_cpu_init; 1022 } 1023 1024 /* 1025 * Real sub-optimal case. Not enough CPUs for poll and 1026 * Tx soft rings. Do a round robin assignment where 1027 * each Rx SRS will get the same CPU for poll, worker 1028 * and fanout soft ring. 1029 */ 1030 cpu_cnt = 0; 1031 for (srs_cnt = 0; srs_cnt < flent->fe_rx_srs_cnt; srs_cnt++) { 1032 rx_srs = flent->fe_rx_srs[srs_cnt]; 1033 srs_cpu = &rx_srs->srs_cpu; 1034 if (rx_srs->srs_fanout_state == SRS_FANOUT_INIT) 1035 rx_srs->srs_fanout_state = SRS_FANOUT_REINIT; 1036 srs_cpu->mc_ncpus = no_of_cpus; 1037 bcopy(mrp->mrp_cpu, 1038 srs_cpu->mc_cpus, sizeof (srs_cpu->mc_cpus)); 1039 srs_cpu->mc_rx_fanout_cnt = 1; 1040 srs_cpu->mc_rx_pollid = mrp->mrp_cpu[cpu_cnt]; 1041 /* Retarget the interrupt to the same CPU as the poll */ 1042 srs_cpu->mc_rx_intr_cpu = srs_cpu->mc_rx_pollid; 1043 srs_cpu->mc_rx_workerid = mrp->mrp_cpu[cpu_cnt]; 1044 srs_cpu->mc_rx_fanout_cpus[0] = mrp->mrp_cpu[cpu_cnt]; 1045 if (++cpu_cnt >= no_of_cpus) 1046 cpu_cnt = 0; 1047 } 1048 1049 tx_cpu_init: 1050 mac_tx_cpu_init(flent, mrp, NULL); 1051 1052 /* 1053 * Copy the user specified CPUs to the effective CPUs 1054 */ 1055 for (i = 0; i < mrp->mrp_ncpus; i++) { 1056 emrp->mrp_cpu[i] = mrp->mrp_cpu[i]; 1057 } 1058 emrp->mrp_ncpus = mrp->mrp_ncpus; 1059 emrp->mrp_mask = mrp->mrp_mask; 1060 bzero(emrp->mrp_pool, MAXPATHLEN); 1061 } 1062 1063 /* 1064 * mac_flow_cpu_init(): 1065 * 1066 * Each SRS has a mac_cpu_t structure, srs_cpu. This routine fills in 1067 * the CPU binding information in srs_cpu for all Rx SRSes associated 1068 * with a flent. 1069 */ 1070 static void 1071 mac_flow_cpu_init(flow_entry_t *flent, cpupart_t *cpupart) 1072 { 1073 mac_soft_ring_set_t *rx_srs; 1074 processorid_t cpuid; 1075 int i, j, k, srs_cnt, nscpus, maxcpus, soft_ring_cnt = 0; 1076 mac_cpus_t *srs_cpu; 1077 mac_resource_props_t *emrp = &flent->fe_effective_props; 1078 uint32_t cpus[MRP_NCPUS]; 1079 1080 /* 1081 * The maximum number of CPUs available can either be 1082 * the number of CPUs in the pool or the number of CPUs 1083 * in the system. 1084 */ 1085 maxcpus = (cpupart != NULL) ? cpupart->cp_ncpus : ncpus; 1086 1087 /* 1088 * Compute the number of soft rings needed on top for each Rx 1089 * SRS. "rx_srs_cnt-1" indicates the number of Rx SRS 1090 * associated with h/w Rx rings. Soft ring count needed for 1091 * each h/w Rx SRS is computed and the same is applied to 1092 * software classified Rx SRS. The first Rx SRS in fe_rx_srs[] 1093 * is the software classified Rx SRS. 1094 */ 1095 soft_ring_cnt = mac_compute_soft_ring_count(flent, 1096 flent->fe_rx_srs_cnt - 1, maxcpus); 1097 if (soft_ring_cnt == 0) { 1098 /* 1099 * Even when soft_ring_cnt is 0, we still need 1100 * to create a soft ring for TCP, UDP and 1101 * OTHER. So set it to 1. 1102 */ 1103 soft_ring_cnt = 1; 1104 } 1105 for (srs_cnt = 0; srs_cnt < flent->fe_rx_srs_cnt; srs_cnt++) { 1106 rx_srs = flent->fe_rx_srs[srs_cnt]; 1107 srs_cpu = &rx_srs->srs_cpu; 1108 if (rx_srs->srs_fanout_state == SRS_FANOUT_INIT) 1109 rx_srs->srs_fanout_state = SRS_FANOUT_REINIT; 1110 srs_cpu->mc_ncpus = soft_ring_cnt; 1111 srs_cpu->mc_rx_fanout_cnt = soft_ring_cnt; 1112 mutex_enter(&cpu_lock); 1113 for (j = 0; j < soft_ring_cnt; j++) { 1114 cpuid = mac_next_bind_cpu(cpupart); 1115 srs_cpu->mc_cpus[j] = cpuid; 1116 srs_cpu->mc_rx_fanout_cpus[j] = cpuid; 1117 } 1118 cpuid = mac_next_bind_cpu(cpupart); 1119 srs_cpu->mc_rx_pollid = cpuid; 1120 srs_cpu->mc_rx_intr_cpu = (mac_rx_intr_retarget ? 1121 srs_cpu->mc_rx_pollid : -1); 1122 /* increment ncpus to account for polling cpu */ 1123 srs_cpu->mc_ncpus++; 1124 srs_cpu->mc_cpus[j++] = cpuid; 1125 if (!mac_latency_optimize) { 1126 cpuid = mac_next_bind_cpu(cpupart); 1127 srs_cpu->mc_ncpus++; 1128 srs_cpu->mc_cpus[j++] = cpuid; 1129 } 1130 srs_cpu->mc_rx_workerid = cpuid; 1131 mutex_exit(&cpu_lock); 1132 } 1133 1134 nscpus = 0; 1135 for (srs_cnt = 0; srs_cnt < flent->fe_rx_srs_cnt; srs_cnt++) { 1136 rx_srs = flent->fe_rx_srs[srs_cnt]; 1137 srs_cpu = &rx_srs->srs_cpu; 1138 for (j = 0; j < srs_cpu->mc_ncpus; j++) { 1139 cpus[nscpus++] = srs_cpu->mc_cpus[j]; 1140 } 1141 } 1142 1143 1144 /* 1145 * Copy cpu list to fe_effective_props 1146 * without duplicates. 1147 */ 1148 k = 0; 1149 for (i = 0; i < nscpus; i++) { 1150 for (j = 0; j < k; j++) { 1151 if (emrp->mrp_cpu[j] == cpus[i]) 1152 break; 1153 } 1154 if (j == k) 1155 emrp->mrp_cpu[k++] = cpus[i]; 1156 } 1157 emrp->mrp_ncpus = k; 1158 1159 mac_tx_cpu_init(flent, NULL, cpupart); 1160 } 1161 1162 /* 1163 * DATAPATH SETUP ROUTINES 1164 * (setup SRS and set/update FANOUT, B/W and PRIORITY) 1165 */ 1166 1167 /* 1168 * mac_srs_fanout_list_alloc: 1169 * 1170 * The underlying device can expose upto MAX_RINGS_PER_GROUP worth of 1171 * rings to a client. In such a case, MAX_RINGS_PER_GROUP worth of 1172 * array space is needed to store Tx soft rings. Thus we allocate so 1173 * much array space for srs_tx_soft_rings. 1174 * 1175 * And when it is an aggr, again we allocate MAX_RINGS_PER_GROUP worth 1176 * of space to st_soft_rings. This array is used for quick access to 1177 * soft ring associated with a pseudo Tx ring based on the pseudo 1178 * ring's index (mr_index). 1179 */ 1180 static void 1181 mac_srs_fanout_list_alloc(mac_soft_ring_set_t *mac_srs) 1182 { 1183 mac_client_impl_t *mcip = mac_srs->srs_mcip; 1184 1185 if (mac_srs->srs_type & SRST_TX) { 1186 mac_srs->srs_tx_soft_rings = (mac_soft_ring_t **) 1187 kmem_zalloc(sizeof (mac_soft_ring_t *) * 1188 MAX_RINGS_PER_GROUP, KM_SLEEP); 1189 if (mcip->mci_state_flags & MCIS_IS_AGGR) { 1190 mac_srs_tx_t *tx = &mac_srs->srs_tx; 1191 1192 tx->st_soft_rings = (mac_soft_ring_t **) 1193 kmem_zalloc(sizeof (mac_soft_ring_t *) * 1194 MAX_RINGS_PER_GROUP, KM_SLEEP); 1195 } 1196 } else { 1197 mac_srs->srs_tcp_soft_rings = (mac_soft_ring_t **) 1198 kmem_zalloc(sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT, 1199 KM_SLEEP); 1200 mac_srs->srs_udp_soft_rings = (mac_soft_ring_t **) 1201 kmem_zalloc(sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT, 1202 KM_SLEEP); 1203 mac_srs->srs_oth_soft_rings = (mac_soft_ring_t **) 1204 kmem_zalloc(sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT, 1205 KM_SLEEP); 1206 } 1207 } 1208 1209 static void 1210 mac_srs_worker_bind(mac_soft_ring_set_t *mac_srs, processorid_t cpuid) 1211 { 1212 cpu_t *cp; 1213 boolean_t clear = B_FALSE; 1214 1215 ASSERT(MUTEX_HELD(&cpu_lock)); 1216 1217 if (!mac_srs_thread_bind) 1218 return; 1219 1220 cp = cpu_get(cpuid); 1221 if (cp == NULL || !cpu_is_online(cp)) 1222 return; 1223 1224 mutex_enter(&mac_srs->srs_lock); 1225 mac_srs->srs_state |= SRS_WORKER_BOUND; 1226 if (mac_srs->srs_worker_cpuid != -1) 1227 clear = B_TRUE; 1228 mac_srs->srs_worker_cpuid = cpuid; 1229 mutex_exit(&mac_srs->srs_lock); 1230 1231 if (clear) 1232 thread_affinity_clear(mac_srs->srs_worker); 1233 1234 thread_affinity_set(mac_srs->srs_worker, cpuid); 1235 DTRACE_PROBE1(worker__CPU, processorid_t, cpuid); 1236 } 1237 1238 static void 1239 mac_srs_poll_bind(mac_soft_ring_set_t *mac_srs, processorid_t cpuid) 1240 { 1241 cpu_t *cp; 1242 boolean_t clear = B_FALSE; 1243 1244 ASSERT(MUTEX_HELD(&cpu_lock)); 1245 1246 if (!mac_srs_thread_bind || mac_srs->srs_poll_thr == NULL) 1247 return; 1248 1249 cp = cpu_get(cpuid); 1250 if (cp == NULL || !cpu_is_online(cp)) 1251 return; 1252 1253 mutex_enter(&mac_srs->srs_lock); 1254 mac_srs->srs_state |= SRS_POLL_BOUND; 1255 if (mac_srs->srs_poll_cpuid != -1) 1256 clear = B_TRUE; 1257 mac_srs->srs_poll_cpuid = cpuid; 1258 mutex_exit(&mac_srs->srs_lock); 1259 1260 if (clear) 1261 thread_affinity_clear(mac_srs->srs_poll_thr); 1262 1263 thread_affinity_set(mac_srs->srs_poll_thr, cpuid); 1264 DTRACE_PROBE1(poll__CPU, processorid_t, cpuid); 1265 } 1266 1267 /* 1268 * Re-target interrupt to the passed CPU. If re-target is successful, 1269 * set mc_rx_intr_cpu to the re-targeted CPU. Otherwise set it to -1. 1270 */ 1271 void 1272 mac_rx_srs_retarget_intr(mac_soft_ring_set_t *mac_srs, processorid_t cpuid) 1273 { 1274 cpu_t *cp; 1275 mac_ring_t *ring = mac_srs->srs_ring; 1276 mac_intr_t *mintr = &ring->mr_info.mri_intr; 1277 flow_entry_t *flent = mac_srs->srs_flent; 1278 boolean_t primary = mac_is_primary_client(mac_srs->srs_mcip); 1279 1280 ASSERT(MUTEX_HELD(&cpu_lock)); 1281 1282 /* 1283 * Don't re-target the interrupt for these cases: 1284 * 1) ring is NULL 1285 * 2) the interrupt is shared (mi_ddi_shared) 1286 * 3) ddi_handle is NULL and !primary 1287 * 4) primary, ddi_handle is NULL but fe_rx_srs_cnt > 2 1288 * Case 3 & 4 are because of mac_client_intr_cpu() routine. 1289 * This routine will re-target fixed interrupt for primary 1290 * mac client if the client has only one ring. In that 1291 * case, mc_rx_intr_cpu will already have the correct value. 1292 */ 1293 if (ring == NULL || mintr->mi_ddi_shared || cpuid == -1 || 1294 (mintr->mi_ddi_handle == NULL && !primary) || (primary && 1295 mintr->mi_ddi_handle == NULL && flent->fe_rx_srs_cnt > 2)) { 1296 mac_srs->srs_cpu.mc_rx_intr_cpu = -1; 1297 return; 1298 } 1299 1300 if (mintr->mi_ddi_handle == NULL) 1301 return; 1302 1303 cp = cpu_get(cpuid); 1304 if (cp == NULL || !cpu_is_online(cp)) 1305 return; 1306 1307 /* Drop the cpu_lock as set_intr_affinity() holds it */ 1308 mutex_exit(&cpu_lock); 1309 if (set_intr_affinity(mintr->mi_ddi_handle, cpuid) == DDI_SUCCESS) 1310 mac_srs->srs_cpu.mc_rx_intr_cpu = cpuid; 1311 else 1312 mac_srs->srs_cpu.mc_rx_intr_cpu = -1; 1313 mutex_enter(&cpu_lock); 1314 } 1315 1316 /* 1317 * Re-target Tx interrupts 1318 */ 1319 void 1320 mac_tx_srs_retarget_intr(mac_soft_ring_set_t *mac_srs) 1321 { 1322 cpu_t *cp; 1323 mac_ring_t *ring; 1324 mac_intr_t *mintr; 1325 mac_soft_ring_t *sringp; 1326 mac_srs_tx_t *srs_tx; 1327 mac_cpus_t *srs_cpu; 1328 processorid_t cpuid; 1329 int i; 1330 1331 ASSERT(MUTEX_HELD(&cpu_lock)); 1332 1333 srs_cpu = &mac_srs->srs_cpu; 1334 if (MAC_TX_SOFT_RINGS(mac_srs)) { 1335 for (i = 0; i < mac_srs->srs_tx_ring_count; i++) { 1336 sringp = mac_srs->srs_tx_soft_rings[i]; 1337 ring = (mac_ring_t *)sringp->s_ring_tx_arg2; 1338 cpuid = srs_cpu->mc_tx_intr_cpu[i]; 1339 cp = cpu_get(cpuid); 1340 if (cp == NULL || !cpu_is_online(cp) || 1341 !MAC_RING_RETARGETABLE(ring)) { 1342 srs_cpu->mc_tx_retargeted_cpu[i] = -1; 1343 continue; 1344 } 1345 mintr = &ring->mr_info.mri_intr; 1346 /* 1347 * Drop the cpu_lock as set_intr_affinity() 1348 * holds it 1349 */ 1350 mutex_exit(&cpu_lock); 1351 if (set_intr_affinity(mintr->mi_ddi_handle, 1352 cpuid) == DDI_SUCCESS) { 1353 srs_cpu->mc_tx_retargeted_cpu[i] = cpuid; 1354 } else { 1355 srs_cpu->mc_tx_retargeted_cpu[i] = -1; 1356 } 1357 mutex_enter(&cpu_lock); 1358 } 1359 } else { 1360 cpuid = srs_cpu->mc_tx_intr_cpu[0]; 1361 cp = cpu_get(cpuid); 1362 if (cp == NULL || !cpu_is_online(cp)) { 1363 srs_cpu->mc_tx_retargeted_cpu[0] = -1; 1364 return; 1365 } 1366 srs_tx = &mac_srs->srs_tx; 1367 ring = (mac_ring_t *)srs_tx->st_arg2; 1368 if (MAC_RING_RETARGETABLE(ring)) { 1369 mintr = &ring->mr_info.mri_intr; 1370 mutex_exit(&cpu_lock); 1371 if ((set_intr_affinity(mintr->mi_ddi_handle, 1372 cpuid) == DDI_SUCCESS)) { 1373 srs_cpu->mc_tx_retargeted_cpu[0] = cpuid; 1374 } else { 1375 srs_cpu->mc_tx_retargeted_cpu[0] = -1; 1376 } 1377 mutex_enter(&cpu_lock); 1378 } 1379 } 1380 } 1381 1382 /* 1383 * When a CPU comes back online, bind the MAC kernel threads which 1384 * were previously bound to that CPU, and had to be unbound because 1385 * the CPU was going away. 1386 * 1387 * These functions are called with cpu_lock held and hence we can't 1388 * cv_wait to grab the mac perimeter. Since these functions walk the soft 1389 * ring list of an SRS without being in the perimeter, the list itself 1390 * is protected by the SRS lock. 1391 */ 1392 static void 1393 mac_walk_srs_and_bind(int cpuid) 1394 { 1395 mac_soft_ring_set_t *mac_srs; 1396 mac_soft_ring_t *soft_ring; 1397 1398 rw_enter(&mac_srs_g_lock, RW_READER); 1399 1400 if ((mac_srs = mac_srs_g_list) == NULL) 1401 goto done; 1402 1403 for (; mac_srs != NULL; mac_srs = mac_srs->srs_next) { 1404 if (mac_srs->srs_worker_cpuid == -1 && 1405 mac_srs->srs_worker_cpuid_save == cpuid) { 1406 mac_srs->srs_worker_cpuid_save = -1; 1407 mac_srs_worker_bind(mac_srs, cpuid); 1408 } 1409 1410 if (!(mac_srs->srs_type & SRST_TX)) { 1411 if (mac_srs->srs_poll_cpuid == -1 && 1412 mac_srs->srs_poll_cpuid_save == cpuid) { 1413 mac_srs->srs_poll_cpuid_save = -1; 1414 mac_srs_poll_bind(mac_srs, cpuid); 1415 } 1416 } 1417 1418 /* Next tackle the soft rings associated with the srs */ 1419 mutex_enter(&mac_srs->srs_lock); 1420 for (soft_ring = mac_srs->srs_soft_ring_head; soft_ring != NULL; 1421 soft_ring = soft_ring->s_ring_next) { 1422 if (soft_ring->s_ring_cpuid == -1 && 1423 soft_ring->s_ring_cpuid_save == cpuid) { 1424 soft_ring->s_ring_cpuid_save = -1; 1425 (void) mac_soft_ring_bind(soft_ring, cpuid); 1426 } 1427 } 1428 mutex_exit(&mac_srs->srs_lock); 1429 } 1430 done: 1431 rw_exit(&mac_srs_g_lock); 1432 } 1433 1434 /* 1435 * Change the priority of the SRS's poll and worker thread. Additionally, 1436 * update the priority of the worker threads for the SRS's soft rings. 1437 * Need to modify any associated squeue threads. 1438 */ 1439 void 1440 mac_update_srs_priority(mac_soft_ring_set_t *mac_srs, pri_t prival) 1441 { 1442 mac_soft_ring_t *ringp; 1443 1444 mac_srs->srs_pri = prival; 1445 thread_lock(mac_srs->srs_worker); 1446 (void) thread_change_pri(mac_srs->srs_worker, mac_srs->srs_pri, 0); 1447 thread_unlock(mac_srs->srs_worker); 1448 if (mac_srs->srs_poll_thr != NULL) { 1449 thread_lock(mac_srs->srs_poll_thr); 1450 (void) thread_change_pri(mac_srs->srs_poll_thr, 1451 mac_srs->srs_pri, 0); 1452 thread_unlock(mac_srs->srs_poll_thr); 1453 } 1454 if ((ringp = mac_srs->srs_soft_ring_head) == NULL) 1455 return; 1456 while (ringp != mac_srs->srs_soft_ring_tail) { 1457 thread_lock(ringp->s_ring_worker); 1458 (void) thread_change_pri(ringp->s_ring_worker, 1459 mac_srs->srs_pri, 0); 1460 thread_unlock(ringp->s_ring_worker); 1461 ringp = ringp->s_ring_next; 1462 } 1463 ASSERT(ringp == mac_srs->srs_soft_ring_tail); 1464 thread_lock(ringp->s_ring_worker); 1465 (void) thread_change_pri(ringp->s_ring_worker, mac_srs->srs_pri, 0); 1466 thread_unlock(ringp->s_ring_worker); 1467 } 1468 1469 /* 1470 * Change the receive bandwidth limit. 1471 */ 1472 static void 1473 mac_rx_srs_update_bwlimit(mac_soft_ring_set_t *srs, mac_resource_props_t *mrp) 1474 { 1475 mac_soft_ring_t *softring; 1476 1477 mutex_enter(&srs->srs_lock); 1478 mutex_enter(&srs->srs_bw->mac_bw_lock); 1479 1480 if (mrp->mrp_maxbw == MRP_MAXBW_RESETVAL) { 1481 /* Reset bandwidth limit */ 1482 if (srs->srs_type & SRST_BW_CONTROL) { 1483 softring = srs->srs_soft_ring_head; 1484 while (softring != NULL) { 1485 softring->s_ring_type &= ~ST_RING_BW_CTL; 1486 softring = softring->s_ring_next; 1487 } 1488 srs->srs_type &= ~SRST_BW_CONTROL; 1489 srs->srs_drain_func = mac_rx_srs_drain; 1490 } 1491 } else { 1492 /* Set/Modify bandwidth limit */ 1493 srs->srs_bw->mac_bw_limit = FLOW_BYTES_PER_TICK(mrp->mrp_maxbw); 1494 /* 1495 * Give twice the queuing capability before 1496 * dropping packets. The unit is bytes/tick. 1497 */ 1498 srs->srs_bw->mac_bw_drop_threshold = 1499 srs->srs_bw->mac_bw_limit << 1; 1500 if (!(srs->srs_type & SRST_BW_CONTROL)) { 1501 softring = srs->srs_soft_ring_head; 1502 while (softring != NULL) { 1503 softring->s_ring_type |= ST_RING_BW_CTL; 1504 softring = softring->s_ring_next; 1505 } 1506 srs->srs_type |= SRST_BW_CONTROL; 1507 srs->srs_drain_func = mac_rx_srs_drain_bw; 1508 } 1509 } 1510 done: 1511 mutex_exit(&srs->srs_bw->mac_bw_lock); 1512 mutex_exit(&srs->srs_lock); 1513 } 1514 1515 /* Change the transmit bandwidth limit */ 1516 static void 1517 mac_tx_srs_update_bwlimit(mac_soft_ring_set_t *srs, mac_resource_props_t *mrp) 1518 { 1519 uint32_t tx_mode, ring_info = 0; 1520 mac_srs_tx_t *srs_tx = &srs->srs_tx; 1521 mac_client_impl_t *mcip = srs->srs_mcip; 1522 1523 /* 1524 * We need to quiesce/restart the client here because mac_tx() and 1525 * srs->srs_tx->st_func do not hold srs->srs_lock while accessing 1526 * st_mode and related fields, which are modified by the code below. 1527 */ 1528 mac_tx_client_quiesce((mac_client_handle_t)mcip); 1529 1530 mutex_enter(&srs->srs_lock); 1531 mutex_enter(&srs->srs_bw->mac_bw_lock); 1532 1533 tx_mode = srs_tx->st_mode; 1534 if (mrp->mrp_maxbw == MRP_MAXBW_RESETVAL) { 1535 /* Reset bandwidth limit */ 1536 if (tx_mode == SRS_TX_BW) { 1537 if (srs_tx->st_arg2 != NULL) 1538 ring_info = mac_hwring_getinfo(srs_tx->st_arg2); 1539 if (mac_tx_serialize || 1540 (ring_info & MAC_RING_TX_SERIALIZE)) { 1541 srs_tx->st_mode = SRS_TX_SERIALIZE; 1542 } else { 1543 srs_tx->st_mode = SRS_TX_DEFAULT; 1544 } 1545 } else if (tx_mode == SRS_TX_BW_FANOUT) { 1546 srs_tx->st_mode = SRS_TX_FANOUT; 1547 } else if (tx_mode == SRS_TX_BW_AGGR) { 1548 srs_tx->st_mode = SRS_TX_AGGR; 1549 } 1550 srs->srs_type &= ~SRST_BW_CONTROL; 1551 } else { 1552 /* Set/Modify bandwidth limit */ 1553 srs->srs_bw->mac_bw_limit = FLOW_BYTES_PER_TICK(mrp->mrp_maxbw); 1554 /* 1555 * Give twice the queuing capability before 1556 * dropping packets. The unit is bytes/tick. 1557 */ 1558 srs->srs_bw->mac_bw_drop_threshold = 1559 srs->srs_bw->mac_bw_limit << 1; 1560 srs->srs_type |= SRST_BW_CONTROL; 1561 if (tx_mode != SRS_TX_BW && tx_mode != SRS_TX_BW_FANOUT && 1562 tx_mode != SRS_TX_BW_AGGR) { 1563 if (tx_mode == SRS_TX_SERIALIZE || 1564 tx_mode == SRS_TX_DEFAULT) { 1565 srs_tx->st_mode = SRS_TX_BW; 1566 } else if (tx_mode == SRS_TX_FANOUT) { 1567 srs_tx->st_mode = SRS_TX_BW_FANOUT; 1568 } else if (tx_mode == SRS_TX_AGGR) { 1569 srs_tx->st_mode = SRS_TX_BW_AGGR; 1570 } else { 1571 ASSERT(0); 1572 } 1573 } 1574 } 1575 done: 1576 srs_tx->st_func = mac_tx_get_func(srs_tx->st_mode); 1577 mutex_exit(&srs->srs_bw->mac_bw_lock); 1578 mutex_exit(&srs->srs_lock); 1579 1580 mac_tx_client_restart((mac_client_handle_t)mcip); 1581 } 1582 1583 /* 1584 * The uber function that deals with any update to bandwidth limits. 1585 */ 1586 void 1587 mac_srs_update_bwlimit(flow_entry_t *flent, mac_resource_props_t *mrp) 1588 { 1589 int count; 1590 1591 for (count = 0; count < flent->fe_rx_srs_cnt; count++) 1592 mac_rx_srs_update_bwlimit(flent->fe_rx_srs[count], mrp); 1593 mac_tx_srs_update_bwlimit(flent->fe_tx_srs, mrp); 1594 } 1595 1596 /* 1597 * When the first sub-flow is added to a link, we disable polling on the 1598 * link and also modify the entry point to mac_rx_srs_subflow_process. 1599 * (polling is disabled because with the subflow added, accounting 1600 * for polling needs additional logic, it is assumed that when a subflow is 1601 * added, we can take some hit as a result of disabling polling rather than 1602 * adding more complexity - if this becomes a perf. issue we need to 1603 * re-rvaluate this logic). When the last subflow is removed, we turn back 1604 * polling and also reset the entry point to mac_rx_srs_process. 1605 * 1606 * In the future if there are multiple SRS, we can simply 1607 * take one and give it to the flow rather than disabling polling and 1608 * resetting the entry point. 1609 */ 1610 void 1611 mac_client_update_classifier(mac_client_impl_t *mcip, boolean_t enable) 1612 { 1613 flow_entry_t *flent = mcip->mci_flent; 1614 int i; 1615 mac_impl_t *mip = mcip->mci_mip; 1616 mac_rx_func_t rx_func; 1617 uint_t rx_srs_cnt; 1618 boolean_t enable_classifier; 1619 1620 ASSERT(MAC_PERIM_HELD((mac_handle_t)mip)); 1621 1622 enable_classifier = !FLOW_TAB_EMPTY(mcip->mci_subflow_tab) && enable; 1623 1624 rx_func = enable_classifier ? mac_rx_srs_subflow_process : 1625 mac_rx_srs_process; 1626 1627 /* Tell mac_srs_poll_state_change to disable polling if necessary */ 1628 if (mip->mi_state_flags & MIS_POLL_DISABLE) 1629 enable_classifier = B_TRUE; 1630 1631 /* 1632 * If receive function has already been configured correctly for 1633 * current subflow configuration, do nothing. 1634 */ 1635 if (flent->fe_cb_fn == (flow_fn_t)rx_func) 1636 return; 1637 1638 rx_srs_cnt = flent->fe_rx_srs_cnt; 1639 for (i = 0; i < rx_srs_cnt; i++) { 1640 ASSERT(flent->fe_rx_srs[i] != NULL); 1641 mac_srs_poll_state_change(flent->fe_rx_srs[i], 1642 enable_classifier, rx_func); 1643 } 1644 1645 /* 1646 * Change the S/W classifier so that we can land in the 1647 * correct processing function with correct argument. 1648 * If all subflows have been removed we can revert to 1649 * mac_rx_srsprocess, else we need mac_rx_srs_subflow_process. 1650 */ 1651 mutex_enter(&flent->fe_lock); 1652 flent->fe_cb_fn = (flow_fn_t)rx_func; 1653 flent->fe_cb_arg1 = (void *)mip; 1654 flent->fe_cb_arg2 = flent->fe_rx_srs[0]; 1655 mutex_exit(&flent->fe_lock); 1656 } 1657 1658 static void 1659 mac_srs_update_fanout_list(mac_soft_ring_set_t *mac_srs) 1660 { 1661 int tcp_count = 0, udp_count = 0, oth_count = 0, tx_count = 0; 1662 mac_soft_ring_t *softring; 1663 1664 softring = mac_srs->srs_soft_ring_head; 1665 if (softring == NULL) { 1666 ASSERT(mac_srs->srs_soft_ring_count == 0); 1667 mac_srs->srs_tcp_ring_count = 0; 1668 mac_srs->srs_udp_ring_count = 0; 1669 mac_srs->srs_oth_ring_count = 0; 1670 mac_srs->srs_tx_ring_count = 0; 1671 return; 1672 } 1673 1674 while (softring != NULL) { 1675 if (softring->s_ring_type & ST_RING_TCP) { 1676 mac_srs->srs_tcp_soft_rings[tcp_count++] = softring; 1677 } else if (softring->s_ring_type & ST_RING_UDP) { 1678 mac_srs->srs_udp_soft_rings[udp_count++] = softring; 1679 } else if (softring->s_ring_type & ST_RING_OTH) { 1680 mac_srs->srs_oth_soft_rings[oth_count++] = softring; 1681 } else { 1682 ASSERT(softring->s_ring_type & ST_RING_TX); 1683 mac_srs->srs_tx_soft_rings[tx_count++] = softring; 1684 } 1685 softring = softring->s_ring_next; 1686 } 1687 1688 ASSERT(mac_srs->srs_soft_ring_count == 1689 (tcp_count + udp_count + oth_count + tx_count)); 1690 mac_srs->srs_tcp_ring_count = tcp_count; 1691 mac_srs->srs_udp_ring_count = udp_count; 1692 mac_srs->srs_oth_ring_count = oth_count; 1693 mac_srs->srs_tx_ring_count = tx_count; 1694 } 1695 1696 void 1697 mac_srs_create_proto_softrings(int id, uint16_t type, pri_t pri, 1698 mac_client_impl_t *mcip, mac_soft_ring_set_t *mac_srs, 1699 processorid_t cpuid, mac_direct_rx_t rx_func, void *x_arg1, 1700 mac_resource_handle_t x_arg2, boolean_t set_bypass) 1701 { 1702 mac_soft_ring_t *softring; 1703 mac_rx_fifo_t mrf; 1704 1705 bzero(&mrf, sizeof (mac_rx_fifo_t)); 1706 mrf.mrf_type = MAC_RX_FIFO; 1707 mrf.mrf_receive = (mac_receive_t)mac_soft_ring_poll; 1708 mrf.mrf_intr_enable = 1709 (mac_intr_enable_t)mac_soft_ring_intr_enable; 1710 mrf.mrf_intr_disable = 1711 (mac_intr_disable_t)mac_soft_ring_intr_disable; 1712 mrf.mrf_flow_priority = pri; 1713 1714 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1715 (type|ST_RING_TCP), pri, mcip, mac_srs, 1716 cpuid, rx_func, x_arg1, x_arg2); 1717 softring->s_ring_rx_arg2 = NULL; 1718 1719 /* 1720 * TCP and UDP support DLS bypass. In addition TCP 1721 * squeue can also poll their corresponding soft rings. 1722 */ 1723 if (set_bypass && (mcip->mci_resource_arg != NULL)) { 1724 mac_soft_ring_dls_bypass(softring, 1725 mcip->mci_direct_rx_fn, 1726 mcip->mci_direct_rx_arg); 1727 1728 mrf.mrf_rx_arg = softring; 1729 mrf.mrf_intr_handle = (mac_intr_handle_t)softring; 1730 1731 /* 1732 * Make a call in IP to get a TCP squeue assigned to 1733 * this softring to maintain full CPU locality through 1734 * the stack and allow the squeue to be able to poll 1735 * the softring so the flow control can be pushed 1736 * all the way to H/W. 1737 */ 1738 softring->s_ring_rx_arg2 = 1739 mcip->mci_resource_add((void *)mcip->mci_resource_arg, 1740 (mac_resource_t *)&mrf); 1741 } 1742 1743 /* 1744 * Non-TCP protocols don't support squeues. Hence we 1745 * don't make any ring addition callbacks for non-TCP 1746 * rings. Now create the UDP softring and allow it to 1747 * bypass the DLS layer. 1748 */ 1749 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1750 (type|ST_RING_UDP), pri, mcip, mac_srs, 1751 cpuid, rx_func, x_arg1, x_arg2); 1752 softring->s_ring_rx_arg2 = NULL; 1753 1754 if (set_bypass && (mcip->mci_resource_arg != NULL)) { 1755 mac_soft_ring_dls_bypass(softring, 1756 mcip->mci_direct_rx_fn, 1757 mcip->mci_direct_rx_arg); 1758 } 1759 1760 /* Create the Oth softrings which has to go through the DLS */ 1761 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1762 (type|ST_RING_OTH), pri, mcip, mac_srs, 1763 cpuid, rx_func, x_arg1, x_arg2); 1764 softring->s_ring_rx_arg2 = NULL; 1765 } 1766 1767 /* 1768 * This routine associates a CPU or a set of CPU to process incoming 1769 * traffic from a mac client. If multiple CPUs are specified, then 1770 * so many soft rings are created with each soft ring worker thread 1771 * bound to a CPU in the set. Each soft ring in turn will be 1772 * associated with an squeue and the squeue will be moved to the 1773 * same CPU as that of the soft ring's. 1774 */ 1775 static void 1776 mac_srs_fanout_modify(mac_client_impl_t *mcip, mac_direct_rx_t rx_func, 1777 void *x_arg1, mac_resource_handle_t x_arg2, 1778 mac_soft_ring_set_t *mac_rx_srs, mac_soft_ring_set_t *mac_tx_srs) 1779 { 1780 mac_soft_ring_t *softring; 1781 uint32_t soft_ring_flag = 0; 1782 processorid_t cpuid = -1; 1783 int i, srings_present, new_fanout_cnt; 1784 mac_cpus_t *srs_cpu; 1785 1786 /* fanout state is REINIT. Set it back to INIT */ 1787 ASSERT(mac_rx_srs->srs_fanout_state == SRS_FANOUT_REINIT); 1788 mac_rx_srs->srs_fanout_state = SRS_FANOUT_INIT; 1789 1790 /* how many are present right now */ 1791 srings_present = mac_rx_srs->srs_tcp_ring_count; 1792 /* new request */ 1793 srs_cpu = &mac_rx_srs->srs_cpu; 1794 new_fanout_cnt = srs_cpu->mc_rx_fanout_cnt; 1795 1796 mutex_enter(&mac_rx_srs->srs_lock); 1797 if (mac_rx_srs->srs_type & SRST_BW_CONTROL) 1798 soft_ring_flag |= ST_RING_BW_CTL; 1799 mutex_exit(&mac_rx_srs->srs_lock); 1800 1801 if (new_fanout_cnt > srings_present) { 1802 /* soft rings increased */ 1803 mutex_enter(&mac_rx_srs->srs_lock); 1804 mac_rx_srs->srs_type |= SRST_FANOUT_SRC_IP; 1805 mutex_exit(&mac_rx_srs->srs_lock); 1806 1807 for (i = mac_rx_srs->srs_tcp_ring_count; 1808 i < new_fanout_cnt; i++) { 1809 /* 1810 * Create the protocol softrings and set the 1811 * DLS bypass where possible. 1812 */ 1813 mac_srs_create_proto_softrings(i, soft_ring_flag, 1814 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1815 rx_func, x_arg1, x_arg2, B_TRUE); 1816 } 1817 mac_srs_update_fanout_list(mac_rx_srs); 1818 } else if (new_fanout_cnt < srings_present) { 1819 /* soft rings decreased */ 1820 if (new_fanout_cnt == 1) { 1821 mutex_enter(&mac_rx_srs->srs_lock); 1822 mac_rx_srs->srs_type &= ~SRST_FANOUT_SRC_IP; 1823 ASSERT(mac_rx_srs->srs_type & SRST_FANOUT_PROTO); 1824 mutex_exit(&mac_rx_srs->srs_lock); 1825 } 1826 /* Get rid of extra soft rings */ 1827 for (i = new_fanout_cnt; 1828 i < mac_rx_srs->srs_tcp_ring_count; i++) { 1829 softring = mac_rx_srs->srs_tcp_soft_rings[i]; 1830 if (softring->s_ring_rx_arg2 != NULL) { 1831 mcip->mci_resource_remove( 1832 (void *)mcip->mci_resource_arg, 1833 softring->s_ring_rx_arg2); 1834 } 1835 mac_soft_ring_remove(mac_rx_srs, 1836 mac_rx_srs->srs_tcp_soft_rings[i]); 1837 mac_soft_ring_remove(mac_rx_srs, 1838 mac_rx_srs->srs_udp_soft_rings[i]); 1839 mac_soft_ring_remove(mac_rx_srs, 1840 mac_rx_srs->srs_oth_soft_rings[i]); 1841 } 1842 mac_srs_update_fanout_list(mac_rx_srs); 1843 } 1844 1845 ASSERT(new_fanout_cnt == mac_rx_srs->srs_tcp_ring_count); 1846 mutex_enter(&cpu_lock); 1847 for (i = 0; i < mac_rx_srs->srs_tcp_ring_count; i++) { 1848 cpuid = srs_cpu->mc_rx_fanout_cpus[i]; 1849 (void) mac_soft_ring_bind(mac_rx_srs->srs_udp_soft_rings[i], 1850 cpuid); 1851 (void) mac_soft_ring_bind(mac_rx_srs->srs_oth_soft_rings[i], 1852 cpuid); 1853 (void) mac_soft_ring_bind(mac_rx_srs->srs_tcp_soft_rings[i], 1854 cpuid); 1855 softring = mac_rx_srs->srs_tcp_soft_rings[i]; 1856 if (softring->s_ring_rx_arg2 != NULL) { 1857 mcip->mci_resource_bind((void *)mcip->mci_resource_arg, 1858 softring->s_ring_rx_arg2, cpuid); 1859 } 1860 } 1861 1862 mac_srs_worker_bind(mac_rx_srs, srs_cpu->mc_rx_workerid); 1863 mac_srs_poll_bind(mac_rx_srs, srs_cpu->mc_rx_pollid); 1864 mac_rx_srs_retarget_intr(mac_rx_srs, srs_cpu->mc_rx_intr_cpu); 1865 /* 1866 * Bind Tx srs and soft ring threads too. Let's bind tx 1867 * srs to the last cpu in mrp list. 1868 */ 1869 if (mac_tx_srs != NULL) { 1870 BIND_TX_SRS_AND_SOFT_RINGS(mac_tx_srs, mrp); 1871 mac_tx_srs_retarget_intr(mac_tx_srs); 1872 } 1873 mutex_exit(&cpu_lock); 1874 } 1875 1876 /* 1877 * Bind SRS threads and soft rings to CPUs/create fanout list. 1878 */ 1879 void 1880 mac_srs_fanout_init(mac_client_impl_t *mcip, mac_resource_props_t *mrp, 1881 mac_direct_rx_t rx_func, void *x_arg1, mac_resource_handle_t x_arg2, 1882 mac_soft_ring_set_t *mac_rx_srs, mac_soft_ring_set_t *mac_tx_srs, 1883 cpupart_t *cpupart) 1884 { 1885 int i; 1886 processorid_t cpuid; 1887 uint32_t soft_ring_flag = 0; 1888 int soft_ring_cnt; 1889 mac_cpus_t *srs_cpu = &mac_rx_srs->srs_cpu; 1890 1891 /* 1892 * Remove the no soft ring flag and we will adjust it 1893 * appropriately further down. 1894 */ 1895 mutex_enter(&mac_rx_srs->srs_lock); 1896 mac_rx_srs->srs_type &= ~SRST_NO_SOFT_RINGS; 1897 mutex_exit(&mac_rx_srs->srs_lock); 1898 1899 ASSERT(mac_rx_srs->srs_soft_ring_head == NULL); 1900 1901 if (mac_rx_srs->srs_type & SRST_BW_CONTROL) 1902 soft_ring_flag |= ST_RING_BW_CTL; 1903 1904 ASSERT(mac_rx_srs->srs_fanout_state == SRS_FANOUT_UNINIT); 1905 mac_rx_srs->srs_fanout_state = SRS_FANOUT_INIT; 1906 /* 1907 * Ring count can be 0 if no fanout is required and no cpu 1908 * were specified. Leave the SRS worker and poll thread 1909 * unbound 1910 */ 1911 ASSERT(mrp != NULL); 1912 soft_ring_cnt = srs_cpu->mc_rx_fanout_cnt; 1913 1914 /* Step 1: bind cpu contains cpu list where threads need to bind */ 1915 if (soft_ring_cnt > 0) { 1916 mutex_enter(&cpu_lock); 1917 for (i = 0; i < soft_ring_cnt; i++) { 1918 cpuid = srs_cpu->mc_rx_fanout_cpus[i]; 1919 /* Create the protocol softrings */ 1920 mac_srs_create_proto_softrings(i, soft_ring_flag, 1921 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1922 rx_func, x_arg1, x_arg2, B_FALSE); 1923 } 1924 mac_srs_worker_bind(mac_rx_srs, srs_cpu->mc_rx_workerid); 1925 mac_srs_poll_bind(mac_rx_srs, srs_cpu->mc_rx_pollid); 1926 mac_rx_srs_retarget_intr(mac_rx_srs, srs_cpu->mc_rx_intr_cpu); 1927 /* 1928 * Bind Tx srs and soft ring threads too. 1929 * Let's bind tx srs to the last cpu in 1930 * mrp list. 1931 */ 1932 if (mac_tx_srs == NULL) { 1933 mutex_exit(&cpu_lock); 1934 goto alldone; 1935 } 1936 1937 BIND_TX_SRS_AND_SOFT_RINGS(mac_tx_srs, mrp); 1938 mac_tx_srs_retarget_intr(mac_tx_srs); 1939 mutex_exit(&cpu_lock); 1940 } else { 1941 mutex_enter(&cpu_lock); 1942 /* 1943 * For a subflow, mrp_workerid and mrp_pollid 1944 * is not set. 1945 */ 1946 mac_srs_worker_bind(mac_rx_srs, mrp->mrp_rx_workerid); 1947 mac_srs_poll_bind(mac_rx_srs, mrp->mrp_rx_pollid); 1948 mutex_exit(&cpu_lock); 1949 goto no_softrings; 1950 } 1951 1952 alldone: 1953 if (soft_ring_cnt > 1) 1954 mac_rx_srs->srs_type |= SRST_FANOUT_SRC_IP; 1955 mac_srs_update_fanout_list(mac_rx_srs); 1956 mac_srs_client_poll_enable(mcip, mac_rx_srs); 1957 return; 1958 1959 no_softrings: 1960 if (mac_rx_srs->srs_type & SRST_FANOUT_PROTO) { 1961 mutex_enter(&cpu_lock); 1962 cpuid = mac_next_bind_cpu(cpupart); 1963 /* Create the protocol softrings */ 1964 mac_srs_create_proto_softrings(0, soft_ring_flag, 1965 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1966 rx_func, x_arg1, x_arg2, B_FALSE); 1967 mutex_exit(&cpu_lock); 1968 } else { 1969 /* 1970 * This is the case when there is no fanout which is 1971 * true for subflows. 1972 */ 1973 mac_rx_srs->srs_type |= SRST_NO_SOFT_RINGS; 1974 } 1975 mac_srs_update_fanout_list(mac_rx_srs); 1976 mac_srs_client_poll_enable(mcip, mac_rx_srs); 1977 } 1978 1979 /* 1980 * mac_fanout_setup: 1981 * 1982 * Calls mac_srs_fanout_init() or modify() depending upon whether 1983 * the SRS is getting initialized or re-initialized. 1984 */ 1985 void 1986 mac_fanout_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 1987 mac_resource_props_t *mrp, mac_direct_rx_t rx_func, void *x_arg1, 1988 mac_resource_handle_t x_arg2, cpupart_t *cpupart) 1989 { 1990 mac_soft_ring_set_t *mac_rx_srs, *mac_tx_srs; 1991 int i, rx_srs_cnt; 1992 1993 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 1994 /* 1995 * This is an aggregation port. Fanout will be setup 1996 * over the aggregation itself. 1997 */ 1998 if (mcip->mci_state_flags & MCIS_EXCLUSIVE) 1999 return; 2000 2001 mac_rx_srs = flent->fe_rx_srs[0]; 2002 /* 2003 * Set up the fanout on the tx side only once, with the 2004 * first rx SRS. The CPU binding, fanout, and bandwidth 2005 * criteria are common to both RX and TX, so 2006 * initializing them along side avoids redundant code. 2007 */ 2008 mac_tx_srs = flent->fe_tx_srs; 2009 rx_srs_cnt = flent->fe_rx_srs_cnt; 2010 2011 /* No fanout for subflows */ 2012 if (flent->fe_type & FLOW_USER) { 2013 mac_srs_fanout_init(mcip, mrp, rx_func, 2014 x_arg1, x_arg2, mac_rx_srs, mac_tx_srs, 2015 cpupart); 2016 return; 2017 } 2018 2019 if (mrp->mrp_mask & MRP_CPUS_USERSPEC) 2020 mac_flow_user_cpu_init(flent, mrp); 2021 else 2022 mac_flow_cpu_init(flent, cpupart); 2023 2024 mrp->mrp_rx_fanout_cnt = mac_rx_srs->srs_cpu.mc_rx_fanout_cnt; 2025 2026 /* 2027 * Set up fanout for both SW (0th SRS) and HW classified 2028 * SRS (the rest of Rx SRSs in flent). 2029 */ 2030 for (i = 0; i < rx_srs_cnt; i++) { 2031 mac_rx_srs = flent->fe_rx_srs[i]; 2032 if (i != 0) 2033 mac_tx_srs = NULL; 2034 switch (mac_rx_srs->srs_fanout_state) { 2035 case SRS_FANOUT_UNINIT: 2036 mac_srs_fanout_init(mcip, mrp, rx_func, 2037 x_arg1, x_arg2, mac_rx_srs, mac_tx_srs, 2038 cpupart); 2039 break; 2040 case SRS_FANOUT_INIT: 2041 break; 2042 case SRS_FANOUT_REINIT: 2043 mac_rx_srs_quiesce(mac_rx_srs, SRS_QUIESCE); 2044 mac_srs_fanout_modify(mcip, rx_func, x_arg1, 2045 x_arg2, mac_rx_srs, mac_tx_srs); 2046 mac_rx_srs_restart(mac_rx_srs); 2047 break; 2048 default: 2049 VERIFY(mac_rx_srs->srs_fanout_state <= 2050 SRS_FANOUT_REINIT); 2051 break; 2052 } 2053 } 2054 } 2055 2056 /* 2057 * mac_srs_create: 2058 * 2059 * Create a mac_soft_ring_set_t (SRS). If soft_ring_fanout_type is 2060 * SRST_TX, an SRS for Tx side is created. Otherwise an SRS for Rx side 2061 * processing is created. 2062 * 2063 * Details on Rx SRS: 2064 * Create a SRS and also add the necessary soft rings for TCP and 2065 * non-TCP based on fanout type and count specified. 2066 * 2067 * mac_soft_ring_fanout, mac_srs_fanout_modify (?), 2068 * mac_soft_ring_stop_workers, mac_soft_ring_set_destroy, etc need 2069 * to be heavily modified. 2070 * 2071 * mi_soft_ring_list_size, mi_soft_ring_size, etc need to disappear. 2072 */ 2073 mac_soft_ring_set_t * 2074 mac_srs_create(mac_client_impl_t *mcip, flow_entry_t *flent, uint32_t srs_type, 2075 mac_direct_rx_t rx_func, void *x_arg1, mac_resource_handle_t x_arg2, 2076 mac_ring_t *ring) 2077 { 2078 mac_soft_ring_set_t *mac_srs; 2079 mac_srs_rx_t *srs_rx; 2080 mac_srs_tx_t *srs_tx; 2081 mac_bw_ctl_t *mac_bw; 2082 mac_resource_props_t *mrp; 2083 boolean_t is_tx_srs = ((srs_type & SRST_TX) != 0); 2084 2085 mac_srs = kmem_cache_alloc(mac_srs_cache, KM_SLEEP); 2086 bzero(mac_srs, sizeof (mac_soft_ring_set_t)); 2087 srs_rx = &mac_srs->srs_rx; 2088 srs_tx = &mac_srs->srs_tx; 2089 2090 mutex_enter(&flent->fe_lock); 2091 2092 /* 2093 * Get the bandwidth control structure from the flent. Get 2094 * rid of any residual values in the control structure for 2095 * the tx bw struct and also for the rx, if the rx srs is 2096 * the 1st one being brought up (the rx bw ctl struct may 2097 * be shared by multiple SRSs) 2098 */ 2099 if (is_tx_srs) { 2100 mac_srs->srs_bw = &flent->fe_tx_bw; 2101 bzero(mac_srs->srs_bw, sizeof (mac_bw_ctl_t)); 2102 flent->fe_tx_srs = mac_srs; 2103 } else { 2104 /* 2105 * The bw counter (stored in the flent) is shared 2106 * by SRS's within an rx group. 2107 */ 2108 mac_srs->srs_bw = &flent->fe_rx_bw; 2109 /* First rx SRS, clear the bw structure */ 2110 if (flent->fe_rx_srs_cnt == 0) 2111 bzero(mac_srs->srs_bw, sizeof (mac_bw_ctl_t)); 2112 2113 /* 2114 * It is better to panic here rather than just assert because 2115 * on a non-debug kernel we might end up courrupting memory 2116 * and making it difficult to debug. 2117 */ 2118 if (flent->fe_rx_srs_cnt >= MAX_RINGS_PER_GROUP) { 2119 panic("Array Overrun detected due to MAC client %p " 2120 " having more rings than %d", (void *)mcip, 2121 MAX_RINGS_PER_GROUP); 2122 } 2123 flent->fe_rx_srs[flent->fe_rx_srs_cnt] = mac_srs; 2124 flent->fe_rx_srs_cnt++; 2125 } 2126 mac_srs->srs_flent = flent; 2127 mutex_exit(&flent->fe_lock); 2128 2129 mac_srs->srs_state = 0; 2130 mac_srs->srs_type = (srs_type | SRST_NO_SOFT_RINGS); 2131 mac_srs->srs_worker_cpuid = mac_srs->srs_worker_cpuid_save = -1; 2132 mac_srs->srs_poll_cpuid = mac_srs->srs_poll_cpuid_save = -1; 2133 mac_srs->srs_mcip = mcip; 2134 mac_srs_fanout_list_alloc(mac_srs); 2135 2136 /* 2137 * For a flow we use the underlying MAC client's priority range with 2138 * the priority value to find an absolute priority value. For a MAC 2139 * client we use the MAC client's maximum priority as the value. 2140 */ 2141 mrp = &flent->fe_effective_props; 2142 if ((mac_srs->srs_type & SRST_FLOW) != 0) { 2143 mac_srs->srs_pri = FLOW_PRIORITY(mcip->mci_min_pri, 2144 mcip->mci_max_pri, mrp->mrp_priority); 2145 } else { 2146 mac_srs->srs_pri = mcip->mci_max_pri; 2147 } 2148 /* 2149 * We need to insert the SRS in the global list before 2150 * binding the SRS and SR threads. Otherwise there is a 2151 * is a small window where the cpu reconfig callbacks 2152 * may miss the SRS in the list walk and DR could fail 2153 * as there are bound threads. 2154 */ 2155 mac_srs_add_glist(mac_srs); 2156 2157 /* Initialize bw limit */ 2158 if ((mrp->mrp_mask & MRP_MAXBW) != 0) { 2159 mac_srs->srs_drain_func = mac_rx_srs_drain_bw; 2160 2161 mac_bw = mac_srs->srs_bw; 2162 mutex_enter(&mac_bw->mac_bw_lock); 2163 mac_bw->mac_bw_limit = FLOW_BYTES_PER_TICK(mrp->mrp_maxbw); 2164 2165 /* 2166 * Give twice the queuing capability before 2167 * dropping packets. The unit is bytes/tick. 2168 */ 2169 mac_bw->mac_bw_drop_threshold = mac_bw->mac_bw_limit << 1; 2170 mutex_exit(&mac_bw->mac_bw_lock); 2171 mac_srs->srs_type |= SRST_BW_CONTROL; 2172 } else { 2173 mac_srs->srs_drain_func = mac_rx_srs_drain; 2174 } 2175 2176 /* 2177 * We use the following policy to control Receive 2178 * Side Dynamic Polling: 2179 * 1) We switch to poll mode anytime the processing thread causes 2180 * a backlog to build up in SRS and its associated Soft Rings 2181 * (sr_poll_pkt_cnt > 0). 2182 * 2) As long as the backlog stays under the low water mark 2183 * (sr_lowat), we poll the H/W for more packets. 2184 * 3) If the backlog (sr_poll_pkt_cnt) exceeds low water mark, we 2185 * stay in poll mode but don't poll the H/W for more packets. 2186 * 4) Anytime in polling mode, if we poll the H/W for packets and 2187 * find nothing plus we have an existing backlog 2188 * (sr_poll_pkt_cnt > 0), we stay in polling mode but don't poll 2189 * the H/W for packets anymore (let the polling thread go to sleep). 2190 * 5) Once the backlog is relived (packets are processed) we reenable 2191 * polling (by signalling the poll thread) only when the backlog 2192 * dips below sr_poll_thres. 2193 * 6) sr_hiwat is used exclusively when we are not polling capable 2194 * and is used to decide when to drop packets so the SRS queue 2195 * length doesn't grow infinitely. 2196 */ 2197 if (!is_tx_srs) { 2198 srs_rx->sr_hiwat = mac_soft_ring_max_q_cnt; 2199 /* Low water mark needs to be less than high water mark */ 2200 srs_rx->sr_lowat = mac_soft_ring_min_q_cnt <= 2201 mac_soft_ring_max_q_cnt ? mac_soft_ring_min_q_cnt : 2202 (mac_soft_ring_max_q_cnt >> 2); 2203 /* Poll threshold need to be half of low water mark or less */ 2204 srs_rx->sr_poll_thres = mac_soft_ring_poll_thres <= 2205 (srs_rx->sr_lowat >> 1) ? mac_soft_ring_poll_thres : 2206 (srs_rx->sr_lowat >> 1); 2207 if (mac_latency_optimize) 2208 mac_srs->srs_state |= SRS_LATENCY_OPT; 2209 else 2210 mac_srs->srs_state |= SRS_SOFTRING_QUEUE; 2211 } 2212 2213 mac_srs->srs_worker = thread_create(NULL, 0, 2214 mac_srs_worker, mac_srs, 0, &p0, TS_RUN, mac_srs->srs_pri); 2215 2216 if (is_tx_srs) { 2217 /* Handle everything about Tx SRS and return */ 2218 mac_srs->srs_drain_func = mac_tx_srs_drain; 2219 srs_tx->st_max_q_cnt = mac_tx_srs_max_q_cnt; 2220 srs_tx->st_hiwat = 2221 (mac_tx_srs_hiwat > mac_tx_srs_max_q_cnt) ? 2222 mac_tx_srs_max_q_cnt : mac_tx_srs_hiwat; 2223 srs_tx->st_arg1 = x_arg1; 2224 srs_tx->st_arg2 = x_arg2; 2225 goto done; 2226 } 2227 2228 if ((srs_type & SRST_FLOW) != 0 || 2229 FLOW_TAB_EMPTY(mcip->mci_subflow_tab)) 2230 srs_rx->sr_lower_proc = mac_rx_srs_process; 2231 else 2232 srs_rx->sr_lower_proc = mac_rx_srs_subflow_process; 2233 2234 srs_rx->sr_func = rx_func; 2235 srs_rx->sr_arg1 = x_arg1; 2236 srs_rx->sr_arg2 = x_arg2; 2237 2238 if (ring != NULL) { 2239 uint_t ring_info; 2240 2241 /* Is the mac_srs created over the RX default group? */ 2242 if (ring->mr_gh == (mac_group_handle_t) 2243 MAC_DEFAULT_RX_GROUP(mcip->mci_mip)) { 2244 mac_srs->srs_type |= SRST_DEFAULT_GRP; 2245 } 2246 mac_srs->srs_ring = ring; 2247 ring->mr_srs = mac_srs; 2248 ring->mr_classify_type = MAC_HW_CLASSIFIER; 2249 ring->mr_flag |= MR_INCIPIENT; 2250 2251 if (!(mcip->mci_mip->mi_state_flags & MIS_POLL_DISABLE) && 2252 FLOW_TAB_EMPTY(mcip->mci_subflow_tab) && mac_poll_enable) 2253 mac_srs->srs_state |= SRS_POLLING_CAPAB; 2254 2255 mac_srs->srs_poll_thr = thread_create(NULL, 0, 2256 mac_rx_srs_poll_ring, mac_srs, 0, &p0, TS_RUN, 2257 mac_srs->srs_pri); 2258 /* 2259 * Some drivers require serialization and don't send 2260 * packet chains in interrupt context. For such 2261 * drivers, we should always queue in soft ring 2262 * so that we get a chance to switch into a polling 2263 * mode under backlog. 2264 */ 2265 ring_info = mac_hwring_getinfo((mac_ring_handle_t)ring); 2266 if (ring_info & MAC_RING_RX_ENQUEUE) 2267 mac_srs->srs_state |= SRS_SOFTRING_QUEUE; 2268 } 2269 done: 2270 mac_srs_stat_create(mac_srs); 2271 return (mac_srs); 2272 } 2273 2274 /* 2275 * Figure out the number of soft rings required. Its dependant on 2276 * if protocol fanout is required (for LINKs), global settings 2277 * require us to do fanout for performance (based on mac_soft_ring_enable), 2278 * or user has specifically requested fanout. 2279 */ 2280 static uint32_t 2281 mac_find_fanout(flow_entry_t *flent, uint32_t link_type) 2282 { 2283 uint32_t fanout_type; 2284 mac_resource_props_t *mrp = &flent->fe_effective_props; 2285 2286 /* no fanout for subflows */ 2287 switch (link_type) { 2288 case SRST_FLOW: 2289 fanout_type = SRST_NO_SOFT_RINGS; 2290 break; 2291 case SRST_LINK: 2292 fanout_type = SRST_FANOUT_PROTO; 2293 break; 2294 } 2295 2296 /* A primary NIC/link is being plumbed */ 2297 if (flent->fe_type & FLOW_PRIMARY_MAC) { 2298 if (mac_soft_ring_enable && mac_rx_soft_ring_count > 1) { 2299 fanout_type |= SRST_FANOUT_SRC_IP; 2300 } 2301 } else if (flent->fe_type & FLOW_VNIC) { 2302 /* A VNIC is being created */ 2303 if (mrp != NULL && mrp->mrp_ncpus > 0) { 2304 fanout_type |= SRST_FANOUT_SRC_IP; 2305 } 2306 } 2307 2308 return (fanout_type); 2309 } 2310 2311 /* 2312 * Change a group from h/w to s/w classification. 2313 */ 2314 void 2315 mac_rx_switch_grp_to_sw(mac_group_t *group) 2316 { 2317 mac_ring_t *ring; 2318 mac_soft_ring_set_t *mac_srs; 2319 2320 for (ring = group->mrg_rings; ring != NULL; ring = ring->mr_next) { 2321 if (ring->mr_classify_type == MAC_HW_CLASSIFIER) { 2322 /* 2323 * Remove the SRS associated with the HW ring. 2324 * As a result, polling will be disabled. 2325 */ 2326 mac_srs = ring->mr_srs; 2327 ASSERT(mac_srs != NULL); 2328 mac_rx_srs_remove(mac_srs); 2329 ring->mr_srs = NULL; 2330 } 2331 2332 if (ring->mr_state != MR_INUSE) 2333 (void) mac_start_ring(ring); 2334 2335 /* 2336 * We need to perform SW classification 2337 * for packets landing in these rings 2338 */ 2339 ring->mr_flag = 0; 2340 ring->mr_classify_type = MAC_SW_CLASSIFIER; 2341 } 2342 } 2343 2344 /* 2345 * Create the Rx SRS for S/W classifier and for each ring in the 2346 * group (if exclusive group). Also create the Tx SRS. 2347 */ 2348 void 2349 mac_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2350 uint32_t link_type) 2351 { 2352 cpupart_t *cpupart; 2353 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 2354 mac_resource_props_t *emrp = MCIP_EFFECTIVE_PROPS(mcip); 2355 boolean_t use_default = B_FALSE; 2356 2357 mac_rx_srs_group_setup(mcip, flent, link_type); 2358 mac_tx_srs_group_setup(mcip, flent, link_type); 2359 2360 pool_lock(); 2361 cpupart = mac_pset_find(mrp, &use_default); 2362 mac_fanout_setup(mcip, flent, MCIP_RESOURCE_PROPS(mcip), 2363 mac_rx_deliver, mcip, NULL, cpupart); 2364 mac_set_pool_effective(use_default, cpupart, mrp, emrp); 2365 pool_unlock(); 2366 } 2367 2368 /* 2369 * Set up the RX SRSs. If the S/W SRS is not set, set it up, if there 2370 * is a group associated with this MAC client, set up SRSs for individual 2371 * h/w rings. 2372 */ 2373 void 2374 mac_rx_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2375 uint32_t link_type) 2376 { 2377 mac_impl_t *mip = mcip->mci_mip; 2378 mac_soft_ring_set_t *mac_srs; 2379 mac_ring_t *ring; 2380 uint32_t fanout_type; 2381 mac_group_t *rx_group = flent->fe_rx_ring_group; 2382 2383 fanout_type = mac_find_fanout(flent, link_type); 2384 2385 /* Create the SRS for S/W classification if none exists */ 2386 if (flent->fe_rx_srs[0] == NULL) { 2387 ASSERT(flent->fe_rx_srs_cnt == 0); 2388 /* Setup the Rx SRS */ 2389 mac_srs = mac_srs_create(mcip, flent, fanout_type | link_type, 2390 mac_rx_deliver, mcip, NULL, NULL); 2391 mutex_enter(&flent->fe_lock); 2392 flent->fe_cb_fn = (flow_fn_t)mac_srs->srs_rx.sr_lower_proc; 2393 flent->fe_cb_arg1 = (void *)mip; 2394 flent->fe_cb_arg2 = (void *)mac_srs; 2395 mutex_exit(&flent->fe_lock); 2396 } 2397 2398 if (rx_group == NULL) 2399 return; 2400 /* 2401 * fanout for default SRS is done when default SRS are created 2402 * above. As each ring is added to the group, we setup the 2403 * SRS and fanout to it. 2404 */ 2405 switch (rx_group->mrg_state) { 2406 case MAC_GROUP_STATE_RESERVED: 2407 for (ring = rx_group->mrg_rings; ring != NULL; 2408 ring = ring->mr_next) { 2409 switch (ring->mr_state) { 2410 case MR_INUSE: 2411 case MR_FREE: 2412 if (ring->mr_srs != NULL) 2413 break; 2414 if (ring->mr_state != MR_INUSE) 2415 (void) mac_start_ring(ring); 2416 2417 /* 2418 * Since the group is exclusively ours create 2419 * an SRS for this ring to allow the 2420 * individual SRS to dynamically poll the 2421 * ring. Do this only if the client is not 2422 * a VLAN MAC client, since for VLAN we do 2423 * s/w classification for the VID check, and 2424 * if it has a unicast address. 2425 */ 2426 if ((mcip->mci_state_flags & 2427 MCIS_NO_UNICAST_ADDR) || 2428 i_mac_flow_vid(mcip->mci_flent) != 2429 VLAN_ID_NONE) { 2430 break; 2431 } 2432 mac_srs = mac_srs_create(mcip, flent, 2433 fanout_type | link_type, 2434 mac_rx_deliver, mcip, NULL, ring); 2435 break; 2436 default: 2437 cmn_err(CE_PANIC, 2438 "srs_setup: mcip = %p " 2439 "trying to add UNKNOWN ring = %p\n", 2440 (void *)mcip, (void *)ring); 2441 break; 2442 } 2443 } 2444 break; 2445 case MAC_GROUP_STATE_SHARED: 2446 /* 2447 * Set all rings of this group to software classified. 2448 * 2449 * If the group is current RESERVED, the existing mac 2450 * client (the only client on this group) is using 2451 * this group exclusively. In that case we need to 2452 * disable polling on the rings of the group (if it 2453 * was enabled), and free the SRS associated with the 2454 * rings. 2455 */ 2456 mac_rx_switch_grp_to_sw(rx_group); 2457 break; 2458 default: 2459 ASSERT(B_FALSE); 2460 break; 2461 } 2462 } 2463 2464 /* 2465 * Set up the TX SRS. 2466 */ 2467 void 2468 mac_tx_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2469 uint32_t link_type) 2470 { 2471 int cnt; 2472 int ringcnt; 2473 mac_ring_t *ring; 2474 mac_group_t *grp; 2475 2476 /* 2477 * If we are opened exclusively (like aggr does for aggr_ports), 2478 * don't set up Tx SRS and Tx soft rings as they won't be used. 2479 * The same thing has to be done for Rx side also. See bug: 2480 * 6880080 2481 */ 2482 if (mcip->mci_state_flags & MCIS_EXCLUSIVE) { 2483 /* 2484 * If we have rings, start them here. 2485 */ 2486 if (flent->fe_tx_ring_group == NULL) 2487 return; 2488 grp = (mac_group_t *)flent->fe_tx_ring_group; 2489 ringcnt = grp->mrg_cur_count; 2490 ring = grp->mrg_rings; 2491 for (cnt = 0; cnt < ringcnt; cnt++) { 2492 if (ring->mr_state != MR_INUSE) { 2493 (void) mac_start_ring(ring); 2494 } 2495 ring = ring->mr_next; 2496 } 2497 return; 2498 } 2499 if (flent->fe_tx_srs == NULL) { 2500 (void) mac_srs_create(mcip, flent, SRST_TX | link_type, 2501 NULL, mcip, NULL, NULL); 2502 } 2503 mac_tx_srs_setup(mcip, flent); 2504 } 2505 2506 /* 2507 * Remove all the RX SRSs. If we want to remove only the SRSs associated 2508 * with h/w rings, leave the S/W SRS alone. This is used when we want to 2509 * move the MAC client from one group to another, so we need to teardown 2510 * on the h/w SRSs. 2511 */ 2512 void 2513 mac_rx_srs_group_teardown(flow_entry_t *flent, boolean_t hwonly) 2514 { 2515 mac_soft_ring_set_t *mac_srs; 2516 int i; 2517 int count = flent->fe_rx_srs_cnt; 2518 2519 for (i = 0; i < count; i++) { 2520 if (i == 0 && hwonly) 2521 continue; 2522 mac_srs = flent->fe_rx_srs[i]; 2523 mac_rx_srs_quiesce(mac_srs, SRS_CONDEMNED); 2524 mac_srs_free(mac_srs); 2525 flent->fe_rx_srs[i] = NULL; 2526 flent->fe_rx_srs_cnt--; 2527 } 2528 ASSERT(!hwonly || flent->fe_rx_srs_cnt == 1); 2529 ASSERT(hwonly || flent->fe_rx_srs_cnt == 0); 2530 } 2531 2532 /* 2533 * Remove the TX SRS. 2534 */ 2535 void 2536 mac_tx_srs_group_teardown(mac_client_impl_t *mcip, flow_entry_t *flent, 2537 uint32_t link_type) 2538 { 2539 mac_soft_ring_set_t *tx_srs; 2540 mac_srs_tx_t *tx; 2541 2542 if ((tx_srs = flent->fe_tx_srs) == NULL) 2543 return; 2544 2545 tx = &tx_srs->srs_tx; 2546 switch (link_type) { 2547 case SRST_FLOW: 2548 /* 2549 * For flows, we need to work with passed 2550 * flent to find the Rx/Tx SRS. 2551 */ 2552 mac_tx_srs_quiesce(tx_srs, SRS_CONDEMNED); 2553 break; 2554 case SRST_LINK: 2555 mac_tx_client_condemn((mac_client_handle_t)mcip); 2556 if (tx->st_arg2 != NULL) { 2557 ASSERT(tx_srs->srs_type & SRST_TX); 2558 /* 2559 * The ring itself will be stopped when 2560 * we release the group or in the 2561 * mac_datapath_teardown (for the default 2562 * group) 2563 */ 2564 tx->st_arg2 = NULL; 2565 } 2566 break; 2567 default: 2568 ASSERT(B_FALSE); 2569 break; 2570 } 2571 mac_srs_free(tx_srs); 2572 flent->fe_tx_srs = NULL; 2573 } 2574 2575 /* 2576 * This is the group state machine. 2577 * 2578 * The state of an Rx group is given by 2579 * the following table. The default group and its rings are started in 2580 * mac_start itself and the default group stays in SHARED state until 2581 * mac_stop at which time the group and rings are stopped and and it 2582 * reverts to the Registered state. 2583 * 2584 * Typically this function is called on a group after adding or removing a 2585 * client from it, to find out what should be the new state of the group. 2586 * If the new state is RESERVED, then the client that owns this group 2587 * exclusively is also returned. Note that adding or removing a client from 2588 * a group could also impact the default group and the caller needs to 2589 * evaluate the effect on the default group. 2590 * 2591 * Group type # of clients mi_nactiveclients Group State 2592 * in the group 2593 * 2594 * Non-default 0 N.A. REGISTERED 2595 * Non-default 1 N.A. RESERVED 2596 * 2597 * Default 0 N.A. SHARED 2598 * Default 1 1 RESERVED 2599 * Default 1 > 1 SHARED 2600 * Default > 1 N.A. SHARED 2601 * 2602 * For a TX group, the following is the state table. 2603 * 2604 * Group type # of clients Group State 2605 * in the group 2606 * 2607 * Non-default 0 REGISTERED 2608 * Non-default 1 RESERVED 2609 * 2610 * Default 0 REGISTERED 2611 * Default 1 RESERVED 2612 * Default > 1 SHARED 2613 */ 2614 mac_group_state_t 2615 mac_group_next_state(mac_group_t *grp, mac_client_impl_t **group_only_mcip, 2616 mac_group_t *defgrp, boolean_t rx_group) 2617 { 2618 mac_impl_t *mip = (mac_impl_t *)grp->mrg_mh; 2619 2620 *group_only_mcip = NULL; 2621 2622 /* Non-default group */ 2623 2624 if (grp != defgrp) { 2625 if (MAC_GROUP_NO_CLIENT(grp)) 2626 return (MAC_GROUP_STATE_REGISTERED); 2627 2628 *group_only_mcip = MAC_GROUP_ONLY_CLIENT(grp); 2629 if (*group_only_mcip != NULL) 2630 return (MAC_GROUP_STATE_RESERVED); 2631 2632 return (MAC_GROUP_STATE_SHARED); 2633 } 2634 2635 /* Default group */ 2636 2637 if (MAC_GROUP_NO_CLIENT(grp)) { 2638 if (rx_group) 2639 return (MAC_GROUP_STATE_SHARED); 2640 else 2641 return (MAC_GROUP_STATE_REGISTERED); 2642 } 2643 *group_only_mcip = MAC_GROUP_ONLY_CLIENT(grp); 2644 if (*group_only_mcip == NULL) 2645 return (MAC_GROUP_STATE_SHARED); 2646 2647 if (rx_group && mip->mi_nactiveclients != 1) 2648 return (MAC_GROUP_STATE_SHARED); 2649 2650 ASSERT(*group_only_mcip != NULL); 2651 return (MAC_GROUP_STATE_RESERVED); 2652 } 2653 2654 /* 2655 * OVERVIEW NOTES FOR DATAPATH 2656 * =========================== 2657 * 2658 * Create an SRS and setup the corresponding flow function and args. 2659 * Add a classification rule for the flow specified by 'flent' and program 2660 * the hardware classifier when applicable. 2661 * 2662 * Rx ring assignment, SRS, polling and B/W enforcement 2663 * ---------------------------------------------------- 2664 * 2665 * We try to use H/W classification on NIC and assign traffic to a 2666 * MAC address to a particular Rx ring. There is a 1-1 mapping 2667 * between a SRS and a Rx ring. The SRS (short for soft ring set) 2668 * dynamically switches the underlying Rx ring between interrupt 2669 * and polling mode and enforces any specified B/W control. 2670 * 2671 * There is always a SRS created and tied to each H/W and S/W rule. 2672 * Whenever we create a H/W rule, we always add the the same rule to 2673 * S/W classifier and tie a SRS to it. 2674 * 2675 * In case a B/W control is specified, its broken into bytes 2676 * per ticks and as soon as the quota for a tick is exhausted, 2677 * the underlying Rx ring is forced into poll mode for remianing 2678 * tick. The SRS poll thread only polls for bytes that are 2679 * allowed to come in the SRS. We typically let 4x the configured 2680 * B/W worth of packets to come in the SRS (to prevent unnecessary 2681 * drops due to bursts) but only process the specified amount. 2682 * 2683 * A Link (primary NIC, VNIC, VLAN or aggr) can have 1 or more 2684 * Rx rings (and corresponding SRSs) assigned to it. The SRS 2685 * in turn can have softrings to do protocol level fanout or 2686 * softrings to do S/W based fanout or both. In case the NIC 2687 * has no Rx rings, we do S/W classification to respective SRS. 2688 * The S/W classification rule is always setup and ready. This 2689 * allows the MAC layer to reassign Rx rings whenever needed 2690 * but packets still continue to flow via the default path and 2691 * getting S/W classified to correct SRS. 2692 * 2693 * In other cases where a NIC or VNIC is plumbed, our goal is use 2694 * H/W classifier and get two Rx ring assigned for the Link. One 2695 * for TCP and one for UDP|SCTP. The respective SRS still do the 2696 * polling on the Rx ring. For Link that is plumbed for IP, there 2697 * is a TCP squeue which also does polling and can control the 2698 * the Rx ring directly (where SRS is just pass through). For 2699 * the following cases, the SRS does the polling underneath. 2700 * 1) non IP based Links (Links which are not plumbed via ifconfig) 2701 * and paths which have no IP squeues (UDP & SCTP) 2702 * 2) If B/W control is specified on the Link 2703 * 3) If S/W fanout is secified 2704 * 2705 * Note1: As of current implementation, we try to assign only 1 Rx 2706 * ring per Link and more than 1 Rx ring for primary Link for 2707 * H/W based fanout. We always create following softrings per SRS: 2708 * 1) TCP softring which is polled by TCP squeue where possible 2709 * (and also bypasses DLS) 2710 * 2) UDP/SCTP based which bypasses DLS 2711 * 3) OTH softring which goes via DLS (currently deal with IPv6 2712 * and non TCP/UDP/SCTP for IPv4 packets). 2713 * 2714 * It is necessary to create 3 softrings since SRS has to poll 2715 * the single Rx ring underneath and enforce any link level B/W 2716 * control (we can't switch the Rx ring in poll mode just based 2717 * on TCP squeue if the same Rx ring is sharing UDP and other 2718 * traffic as well). Once polling is done and any Link level B/W 2719 * control is specified, the packets are assigned to respective 2720 * softring based on protocol. Since TCP has IP based squeue 2721 * which benefits by polling, we separate TCP packets into 2722 * its own softring which can be polled by IP squeue. We need 2723 * to separate out UDP/SCTP to UDP softring since it can bypass 2724 * the DLS layer which has heavy performance advanatges and we 2725 * need a softring (OTH) for rest. 2726 * 2727 * ToDo: The 3 softrings for protocol are needed only till we can 2728 * get rid of DLS from datapath, make IPv4 and IPv6 paths 2729 * symmetric (deal with mac_header_info for v6 and polling for 2730 * IPv4 TCP - ip_accept_tcp is IPv4 specific although squeues 2731 * are generic), and bring SAP based classification to MAC layer 2732 * 2733 * H/W and S/W based fanout and multiple Rx rings per Link 2734 * ------------------------------------------------------- 2735 * 2736 * In case, fanout is requested (or determined automatically based 2737 * on Link speed and processor speed), we try to assign multiple 2738 * Rx rings per Link with their respective SRS. In this case 2739 * the NIC should be capable of fanning out incoming packets between 2740 * the assigned Rx rings (H/W based fanout). All the SRS 2741 * individually switch their Rx ring between interrupt and polling 2742 * mode but share a common B/W control counter in case of Link 2743 * level B/W is specified. 2744 * 2745 * If S/W based fanout is specified in lieu of H/W based fanout, 2746 * the Link SRS creates the specified number of softrings for 2747 * each protocol (TCP, UDP, OTH). Incoming packets are fanned 2748 * out to the correct softring based on their protocol and 2749 * protocol specific hash function. 2750 * 2751 * Primary and non primary MAC clients 2752 * ----------------------------------- 2753 * 2754 * The NICs, VNICs, Vlans, and Aggrs are typically termed as Links 2755 * and are a Layer 2 construct. 2756 * 2757 * Primary NIC: 2758 * The Link that owns the primary MAC address and typically 2759 * is used as the data NIC in non virtualized cases. As such 2760 * H/W resources are preferntially given to primary NIC. As 2761 * far as code is concerned, there is no difference in the 2762 * primary NIC vs VNICs. They are all treated as Links. 2763 * At the very first call to mac_unicast_add() we program the S/W 2764 * classifier for the primary MAC address, get a soft ring set 2765 * (and soft rings based on 'ip_soft_ring_cnt') 2766 * and a Rx ring assigned for polling to get enabled. 2767 * When IP get plumbed and negotiates polling, we can 2768 * let squeue do the polling on TCP softring. 2769 * 2770 * VNICs: 2771 * Same as any other Link. As long as the H/W resource assignments 2772 * are equal, the data path and setup for all Links is same. 2773 * 2774 * Flows: 2775 * Can be configured on Links. They have their own SRS and the 2776 * S/W classifier is programmed appropriately based on the flow. 2777 * The flows typically deal with layer 3 and above and 2778 * creates a soft ring set specific to the flow. The receive 2779 * side function is switched from mac_rx_srs_process to 2780 * mac_rx_srs_subflow_process which first tries to assign the 2781 * packet to appropriate flow SRS and failing which assigns it 2782 * to link SRS. This allows us to avoid the layered approach 2783 * which gets complex. 2784 * 2785 * By the time mac_datapath_setup() completes, we already have the 2786 * soft rings set, Rx rings, soft rings, etc figured out and both H/W 2787 * and S/W classifiers programmed. IP is not plumbed yet (and might 2788 * never be for Virtual Machines guest OS path). When IP is plumbed 2789 * (for both NIC and VNIC), we do a capability negotiation for polling 2790 * and upcall functions etc. 2791 * 2792 * Rx ring Assignement NOTES 2793 * ------------------------- 2794 * 2795 * For NICs which have only 1 Rx ring (we treat NICs with no Rx rings 2796 * as NIC with a single default ring), we assign the only ring to 2797 * primary Link. The primary Link SRS can do polling on it as long as 2798 * it is the only link in use and we compare the MAC address for unicast 2799 * packets before accepting an incoming packet (there is no need for S/W 2800 * classification in this case). We disable polling on the only ring the 2801 * moment 2nd link gets created (the polling remains enabled even though 2802 * there are broadcast and * multicast flows created). 2803 * 2804 * If the NIC has more than 1 Rx ring, we assign the default ring (the 2805 * 1st ring) to deal with broadcast, multicast and traffic for other 2806 * NICs which needs S/W classification. We assign the primary mac 2807 * addresses to another ring by specifiying a classification rule for 2808 * primary unicast MAC address to the selected ring. The primary Link 2809 * (and its SRS) can continue to poll the assigned Rx ring at all times 2810 * independantly. 2811 * 2812 * Note: In future, if no fanout is specified, we try to assign 2 Rx 2813 * rings for the primary Link with the primary MAC address + TCP going 2814 * to one ring and primary MAC address + UDP|SCTP going to other ring. 2815 * Any remaining traffic for primary MAC address can go to the default 2816 * Rx ring and get S/W classified. This way the respective SRSs don't 2817 * need to do proto fanout and don't need to have softrings at all and 2818 * can poll their respective Rx rings. 2819 * 2820 * As an optimization, when a new NIC or VNIC is created, we can get 2821 * only one Rx ring and make it a TCP specific Rx ring and use the 2822 * H/W default Rx ring for the rest (this Rx ring is never polled). 2823 * 2824 * For clients that don't have MAC address, but want to receive and 2825 * transmit packets (e.g, bpf, gvrp etc.), we need to setup the datapath. 2826 * For such clients (identified by the MCIS_NO_UNICAST_ADDR flag) we 2827 * always give the default group and use software classification (i.e. 2828 * even if this is the only client in the default group, we will 2829 * leave group as shared). 2830 */ 2831 int 2832 mac_datapath_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2833 uint32_t link_type) 2834 { 2835 mac_impl_t *mip = mcip->mci_mip; 2836 mac_group_t *rgroup = NULL; 2837 mac_group_t *tgroup = NULL; 2838 mac_group_t *default_rgroup; 2839 mac_group_t *default_tgroup; 2840 int err; 2841 uint8_t *mac_addr; 2842 mac_group_state_t next_state; 2843 mac_client_impl_t *group_only_mcip; 2844 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 2845 mac_resource_props_t *emrp = MCIP_EFFECTIVE_PROPS(mcip); 2846 boolean_t rxhw; 2847 boolean_t txhw; 2848 boolean_t use_default = B_FALSE; 2849 cpupart_t *cpupart; 2850 boolean_t no_unicast; 2851 boolean_t isprimary = flent->fe_type & FLOW_PRIMARY_MAC; 2852 mac_client_impl_t *reloc_pmcip = NULL; 2853 2854 ASSERT(MAC_PERIM_HELD((mac_handle_t)mip)); 2855 2856 switch (link_type) { 2857 case SRST_FLOW: 2858 mac_srs_group_setup(mcip, flent, link_type); 2859 return (0); 2860 2861 case SRST_LINK: 2862 no_unicast = mcip->mci_state_flags & MCIS_NO_UNICAST_ADDR; 2863 mac_addr = flent->fe_flow_desc.fd_dst_mac; 2864 2865 /* Default RX group */ 2866 default_rgroup = MAC_DEFAULT_RX_GROUP(mip); 2867 2868 /* Default TX group */ 2869 default_tgroup = MAC_DEFAULT_TX_GROUP(mip); 2870 2871 if (no_unicast) { 2872 rgroup = default_rgroup; 2873 tgroup = default_tgroup; 2874 goto grp_found; 2875 } 2876 rxhw = (mrp->mrp_mask & MRP_RX_RINGS) && 2877 (mrp->mrp_nrxrings > 0 || 2878 (mrp->mrp_mask & MRP_RXRINGS_UNSPEC)); 2879 txhw = (mrp->mrp_mask & MRP_TX_RINGS) && 2880 (mrp->mrp_ntxrings > 0 || 2881 (mrp->mrp_mask & MRP_TXRINGS_UNSPEC)); 2882 2883 /* 2884 * By default we have given the primary all the rings 2885 * i.e. the default group. Let's see if the primary 2886 * needs to be relocated so that the addition of this 2887 * client doesn't impact the primary's performance, 2888 * i.e. if the primary is in the default group and 2889 * we add this client, the primary will lose polling. 2890 * We do this only for NICs supporting dynamic ring 2891 * grouping and only when this is the first client 2892 * after the primary (i.e. nactiveclients is 2) 2893 */ 2894 if (!isprimary && mip->mi_nactiveclients == 2 && 2895 (group_only_mcip = mac_primary_client_handle(mip)) != 2896 NULL && mip->mi_rx_group_type == MAC_GROUP_TYPE_DYNAMIC) { 2897 reloc_pmcip = mac_check_primary_relocation( 2898 group_only_mcip, rxhw); 2899 } 2900 /* 2901 * Check to see if we can get an exclusive group for 2902 * this mac address or if there already exists a 2903 * group that has this mac address (case of VLANs). 2904 * If no groups are available, use the default group. 2905 */ 2906 rgroup = mac_reserve_rx_group(mcip, mac_addr, B_FALSE); 2907 if (rgroup == NULL && rxhw) { 2908 err = ENOSPC; 2909 goto setup_failed; 2910 } else if (rgroup == NULL) { 2911 rgroup = default_rgroup; 2912 } 2913 /* 2914 * Check to see if we can get an exclusive group for 2915 * this mac client. If no groups are available, use 2916 * the default group. 2917 */ 2918 tgroup = mac_reserve_tx_group(mcip, B_FALSE); 2919 if (tgroup == NULL && txhw) { 2920 if (rgroup != NULL && rgroup != default_rgroup) 2921 mac_release_rx_group(mcip, rgroup); 2922 err = ENOSPC; 2923 goto setup_failed; 2924 } else if (tgroup == NULL) { 2925 tgroup = default_tgroup; 2926 } 2927 2928 /* 2929 * Some NICs don't support any Rx rings, so there may not 2930 * even be a default group. 2931 */ 2932 grp_found: 2933 if (rgroup != NULL) { 2934 if (rgroup != default_rgroup && 2935 MAC_GROUP_NO_CLIENT(rgroup) && 2936 (rxhw || mcip->mci_share != NULL)) { 2937 MAC_RX_GRP_RESERVED(mip); 2938 if (mip->mi_rx_group_type == 2939 MAC_GROUP_TYPE_DYNAMIC) { 2940 MAC_RX_RING_RESERVED(mip, 2941 rgroup->mrg_cur_count); 2942 } 2943 } 2944 flent->fe_rx_ring_group = rgroup; 2945 /* 2946 * Add the client to the group. This could cause 2947 * either this group to move to the shared state or 2948 * cause the default group to move to the shared state. 2949 * The actions on this group are done here, while the 2950 * actions on the default group are postponed to 2951 * the end of this function. 2952 */ 2953 mac_group_add_client(rgroup, mcip); 2954 next_state = mac_group_next_state(rgroup, 2955 &group_only_mcip, default_rgroup, B_TRUE); 2956 mac_set_group_state(rgroup, next_state); 2957 } 2958 2959 if (tgroup != NULL) { 2960 if (tgroup != default_tgroup && 2961 MAC_GROUP_NO_CLIENT(tgroup) && 2962 (txhw || mcip->mci_share != NULL)) { 2963 MAC_TX_GRP_RESERVED(mip); 2964 if (mip->mi_tx_group_type == 2965 MAC_GROUP_TYPE_DYNAMIC) { 2966 MAC_TX_RING_RESERVED(mip, 2967 tgroup->mrg_cur_count); 2968 } 2969 } 2970 flent->fe_tx_ring_group = tgroup; 2971 mac_group_add_client(tgroup, mcip); 2972 next_state = mac_group_next_state(tgroup, 2973 &group_only_mcip, default_tgroup, B_FALSE); 2974 tgroup->mrg_state = next_state; 2975 } 2976 /* 2977 * Setup the Rx and Tx SRSes. If we got a pristine group 2978 * exclusively above, mac_srs_group_setup would simply create 2979 * the required SRSes. If we ended up sharing a previously 2980 * reserved group, mac_srs_group_setup would also dismantle the 2981 * SRSes of the previously exclusive group 2982 */ 2983 mac_srs_group_setup(mcip, flent, link_type); 2984 2985 /* We are setting up minimal datapath only */ 2986 if (no_unicast) 2987 break; 2988 /* Program the S/W Classifer */ 2989 if ((err = mac_flow_add(mip->mi_flow_tab, flent)) != 0) 2990 goto setup_failed; 2991 2992 /* Program the H/W Classifier */ 2993 if ((err = mac_add_macaddr(mip, rgroup, mac_addr, 2994 (mcip->mci_state_flags & MCIS_UNICAST_HW) != 0)) != 0) 2995 goto setup_failed; 2996 mcip->mci_unicast = mac_find_macaddr(mip, mac_addr); 2997 ASSERT(mcip->mci_unicast != NULL); 2998 /* (Re)init the v6 token & local addr used by link protection */ 2999 mac_protect_update_mac_token(mcip); 3000 break; 3001 3002 default: 3003 ASSERT(B_FALSE); 3004 break; 3005 } 3006 3007 /* 3008 * All broadcast and multicast traffic is received only on the default 3009 * group. If we have setup the datapath for a non-default group above 3010 * then move the default group to shared state to allow distribution of 3011 * incoming broadcast traffic to the other groups and dismantle the 3012 * SRSes over the default group. 3013 */ 3014 if (rgroup != NULL) { 3015 if (rgroup != default_rgroup) { 3016 if (default_rgroup->mrg_state == 3017 MAC_GROUP_STATE_RESERVED) { 3018 group_only_mcip = MAC_GROUP_ONLY_CLIENT( 3019 default_rgroup); 3020 ASSERT(group_only_mcip != NULL && 3021 mip->mi_nactiveclients > 1); 3022 3023 mac_set_group_state(default_rgroup, 3024 MAC_GROUP_STATE_SHARED); 3025 mac_rx_srs_group_setup(group_only_mcip, 3026 group_only_mcip->mci_flent, SRST_LINK); 3027 pool_lock(); 3028 cpupart = mac_pset_find(mrp, &use_default); 3029 mac_fanout_setup(group_only_mcip, 3030 group_only_mcip->mci_flent, 3031 MCIP_RESOURCE_PROPS(group_only_mcip), 3032 mac_rx_deliver, group_only_mcip, NULL, 3033 cpupart); 3034 mac_set_pool_effective(use_default, cpupart, 3035 mrp, emrp); 3036 pool_unlock(); 3037 } 3038 ASSERT(default_rgroup->mrg_state == 3039 MAC_GROUP_STATE_SHARED); 3040 } 3041 /* 3042 * If we get an exclusive group for a VLAN MAC client we 3043 * need to take the s/w path to make the additional check for 3044 * the vid. Disable polling and set it to s/w classification. 3045 * Similarly for clients that don't have a unicast address. 3046 */ 3047 if (rgroup->mrg_state == MAC_GROUP_STATE_RESERVED && 3048 (i_mac_flow_vid(flent) != VLAN_ID_NONE || no_unicast)) { 3049 mac_rx_switch_grp_to_sw(rgroup); 3050 } 3051 } 3052 mac_set_rings_effective(mcip); 3053 return (0); 3054 3055 setup_failed: 3056 /* Switch the primary back to default group */ 3057 if (reloc_pmcip != NULL) { 3058 (void) mac_rx_switch_group(reloc_pmcip, 3059 reloc_pmcip->mci_flent->fe_rx_ring_group, default_rgroup); 3060 } 3061 mac_datapath_teardown(mcip, flent, link_type); 3062 return (err); 3063 } 3064 3065 void 3066 mac_datapath_teardown(mac_client_impl_t *mcip, flow_entry_t *flent, 3067 uint32_t link_type) 3068 { 3069 mac_impl_t *mip = mcip->mci_mip; 3070 mac_group_t *group = NULL; 3071 mac_client_impl_t *grp_only_mcip; 3072 flow_entry_t *group_only_flent; 3073 mac_group_t *default_group; 3074 boolean_t check_default_group = B_FALSE; 3075 mac_group_state_t next_state; 3076 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 3077 3078 ASSERT(MAC_PERIM_HELD((mac_handle_t)mip)); 3079 3080 switch (link_type) { 3081 case SRST_FLOW: 3082 mac_rx_srs_group_teardown(flent, B_FALSE); 3083 mac_tx_srs_group_teardown(mcip, flent, SRST_FLOW); 3084 return; 3085 3086 case SRST_LINK: 3087 /* Stop sending packets */ 3088 mac_tx_client_block(mcip); 3089 3090 /* Stop the packets coming from the H/W */ 3091 if (mcip->mci_unicast != NULL) { 3092 int err; 3093 err = mac_remove_macaddr(mcip->mci_unicast); 3094 if (err != 0) { 3095 cmn_err(CE_WARN, "%s: failed to remove a MAC" 3096 " address because of error 0x%x", 3097 mip->mi_name, err); 3098 } 3099 mcip->mci_unicast = NULL; 3100 } 3101 3102 /* Stop the packets coming from the S/W classifier */ 3103 mac_flow_remove(mip->mi_flow_tab, flent, B_FALSE); 3104 mac_flow_wait(flent, FLOW_DRIVER_UPCALL); 3105 3106 /* Now quiesce and destroy all SRS and soft rings */ 3107 mac_rx_srs_group_teardown(flent, B_FALSE); 3108 mac_tx_srs_group_teardown(mcip, flent, SRST_LINK); 3109 3110 ASSERT((mcip->mci_flent == flent) && 3111 (flent->fe_next == NULL)); 3112 3113 /* 3114 * Release our hold on the group as well. We need 3115 * to check if the shared group has only one client 3116 * left who can use it exclusively. Also, if we 3117 * were the last client, release the group. 3118 */ 3119 group = flent->fe_rx_ring_group; 3120 default_group = MAC_DEFAULT_RX_GROUP(mip); 3121 if (group != NULL) { 3122 mac_group_remove_client(group, mcip); 3123 next_state = mac_group_next_state(group, 3124 &grp_only_mcip, default_group, B_TRUE); 3125 if (next_state == MAC_GROUP_STATE_RESERVED) { 3126 /* 3127 * Only one client left on this RX group. 3128 */ 3129 ASSERT(grp_only_mcip != NULL); 3130 mac_set_group_state(group, 3131 MAC_GROUP_STATE_RESERVED); 3132 group_only_flent = grp_only_mcip->mci_flent; 3133 3134 /* 3135 * The only remaining client has exclusive 3136 * access on the group. Allow it to 3137 * dynamically poll the H/W rings etc. 3138 */ 3139 mac_rx_srs_group_setup(grp_only_mcip, 3140 group_only_flent, SRST_LINK); 3141 mac_fanout_setup(grp_only_mcip, 3142 group_only_flent, 3143 MCIP_RESOURCE_PROPS(grp_only_mcip), 3144 mac_rx_deliver, grp_only_mcip, NULL, NULL); 3145 mac_rx_group_unmark(group, MR_INCIPIENT); 3146 mac_set_rings_effective(grp_only_mcip); 3147 } else if (next_state == MAC_GROUP_STATE_REGISTERED) { 3148 /* 3149 * This is a non-default group being freed up. 3150 * We need to reevaluate the default group 3151 * to see if the primary client can get 3152 * exclusive access to the default group. 3153 */ 3154 ASSERT(group != MAC_DEFAULT_RX_GROUP(mip)); 3155 if (mrp->mrp_mask & MRP_RX_RINGS) { 3156 MAC_RX_GRP_RELEASED(mip); 3157 if (mip->mi_rx_group_type == 3158 MAC_GROUP_TYPE_DYNAMIC) { 3159 MAC_RX_RING_RELEASED(mip, 3160 group->mrg_cur_count); 3161 } 3162 } 3163 mac_release_rx_group(mcip, group); 3164 mac_set_group_state(group, 3165 MAC_GROUP_STATE_REGISTERED); 3166 check_default_group = B_TRUE; 3167 } else { 3168 ASSERT(next_state == MAC_GROUP_STATE_SHARED); 3169 mac_set_group_state(group, 3170 MAC_GROUP_STATE_SHARED); 3171 mac_rx_group_unmark(group, MR_CONDEMNED); 3172 } 3173 flent->fe_rx_ring_group = NULL; 3174 } 3175 /* 3176 * Remove the client from the TX group. Additionally, if 3177 * this a non-default group, then we also need to release 3178 * the group. 3179 */ 3180 group = flent->fe_tx_ring_group; 3181 default_group = MAC_DEFAULT_TX_GROUP(mip); 3182 if (group != NULL) { 3183 mac_group_remove_client(group, mcip); 3184 next_state = mac_group_next_state(group, 3185 &grp_only_mcip, default_group, B_FALSE); 3186 if (next_state == MAC_GROUP_STATE_REGISTERED) { 3187 if (group != default_group) { 3188 if (mrp->mrp_mask & MRP_TX_RINGS) { 3189 MAC_TX_GRP_RELEASED(mip); 3190 if (mip->mi_tx_group_type == 3191 MAC_GROUP_TYPE_DYNAMIC) { 3192 MAC_TX_RING_RELEASED( 3193 mip, group-> 3194 mrg_cur_count); 3195 } 3196 } 3197 mac_release_tx_group(mcip, group); 3198 /* 3199 * If the default group is reserved, 3200 * then we need to set the effective 3201 * rings as we would have given 3202 * back some rings when the group 3203 * was released 3204 */ 3205 if (mip->mi_tx_group_type == 3206 MAC_GROUP_TYPE_DYNAMIC && 3207 default_group->mrg_state == 3208 MAC_GROUP_STATE_RESERVED) { 3209 grp_only_mcip = 3210 MAC_GROUP_ONLY_CLIENT 3211 (default_group); 3212 mac_set_rings_effective( 3213 grp_only_mcip); 3214 } 3215 } else { 3216 mac_ring_t *ring; 3217 int cnt; 3218 int ringcnt; 3219 3220 /* 3221 * Stop all the rings except the 3222 * default ring. 3223 */ 3224 ringcnt = group->mrg_cur_count; 3225 ring = group->mrg_rings; 3226 for (cnt = 0; cnt < ringcnt; cnt++) { 3227 if (ring->mr_state == 3228 MR_INUSE && ring != 3229 (mac_ring_t *) 3230 mip->mi_default_tx_ring) { 3231 mac_stop_ring(ring); 3232 ring->mr_flag = 0; 3233 } 3234 ring = ring->mr_next; 3235 } 3236 } 3237 } else if (next_state == MAC_GROUP_STATE_RESERVED) { 3238 mac_set_rings_effective(grp_only_mcip); 3239 } 3240 flent->fe_tx_ring_group = NULL; 3241 group->mrg_state = next_state; 3242 } 3243 break; 3244 default: 3245 ASSERT(B_FALSE); 3246 break; 3247 } 3248 3249 /* 3250 * The mac client using the default group gets exclusive access to the 3251 * default group if and only if it is the sole client on the entire 3252 * mip. If so set the group state to reserved, and set up the SRSes 3253 * over the default group. 3254 */ 3255 if (check_default_group) { 3256 default_group = MAC_DEFAULT_RX_GROUP(mip); 3257 ASSERT(default_group->mrg_state == MAC_GROUP_STATE_SHARED); 3258 next_state = mac_group_next_state(default_group, 3259 &grp_only_mcip, default_group, B_TRUE); 3260 if (next_state == MAC_GROUP_STATE_RESERVED) { 3261 ASSERT(grp_only_mcip != NULL && 3262 mip->mi_nactiveclients == 1); 3263 mac_set_group_state(default_group, 3264 MAC_GROUP_STATE_RESERVED); 3265 mac_rx_srs_group_setup(grp_only_mcip, 3266 grp_only_mcip->mci_flent, SRST_LINK); 3267 mac_fanout_setup(grp_only_mcip, 3268 grp_only_mcip->mci_flent, 3269 MCIP_RESOURCE_PROPS(grp_only_mcip), mac_rx_deliver, 3270 grp_only_mcip, NULL, NULL); 3271 mac_rx_group_unmark(default_group, MR_INCIPIENT); 3272 mac_set_rings_effective(grp_only_mcip); 3273 } 3274 } 3275 3276 /* 3277 * If the primary is the only one left and the MAC supports 3278 * dynamic grouping, we need to see if the primary needs to 3279 * be moved to the default group so that it can use all the 3280 * H/W rings. 3281 */ 3282 if (!(flent->fe_type & FLOW_PRIMARY_MAC) && 3283 mip->mi_nactiveclients == 1 && 3284 mip->mi_rx_group_type == MAC_GROUP_TYPE_DYNAMIC) { 3285 default_group = MAC_DEFAULT_RX_GROUP(mip); 3286 grp_only_mcip = mac_primary_client_handle(mip); 3287 if (grp_only_mcip == NULL) 3288 return; 3289 group_only_flent = grp_only_mcip->mci_flent; 3290 mrp = MCIP_RESOURCE_PROPS(grp_only_mcip); 3291 /* 3292 * If the primary has an explicit property set, leave it 3293 * alone. 3294 */ 3295 if (mrp->mrp_mask & MRP_RX_RINGS) 3296 return; 3297 /* 3298 * Switch the primary to the default group. 3299 */ 3300 (void) mac_rx_switch_group(grp_only_mcip, 3301 group_only_flent->fe_rx_ring_group, default_group); 3302 } 3303 } 3304 3305 /* DATAPATH TEAR DOWN ROUTINES (SRS and FANOUT teardown) */ 3306 3307 static void 3308 mac_srs_fanout_list_free(mac_soft_ring_set_t *mac_srs) 3309 { 3310 if (mac_srs->srs_type & SRST_TX) { 3311 mac_srs_tx_t *tx; 3312 3313 ASSERT(mac_srs->srs_tcp_soft_rings == NULL); 3314 ASSERT(mac_srs->srs_udp_soft_rings == NULL); 3315 ASSERT(mac_srs->srs_oth_soft_rings == NULL); 3316 ASSERT(mac_srs->srs_tx_soft_rings != NULL); 3317 kmem_free(mac_srs->srs_tx_soft_rings, 3318 sizeof (mac_soft_ring_t *) * MAX_RINGS_PER_GROUP); 3319 mac_srs->srs_tx_soft_rings = NULL; 3320 tx = &mac_srs->srs_tx; 3321 if (tx->st_soft_rings != NULL) { 3322 kmem_free(tx->st_soft_rings, 3323 sizeof (mac_soft_ring_t *) * MAX_RINGS_PER_GROUP); 3324 } 3325 } else { 3326 ASSERT(mac_srs->srs_tx_soft_rings == NULL); 3327 ASSERT(mac_srs->srs_tcp_soft_rings != NULL); 3328 kmem_free(mac_srs->srs_tcp_soft_rings, 3329 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3330 mac_srs->srs_tcp_soft_rings = NULL; 3331 ASSERT(mac_srs->srs_udp_soft_rings != NULL); 3332 kmem_free(mac_srs->srs_udp_soft_rings, 3333 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3334 mac_srs->srs_udp_soft_rings = NULL; 3335 ASSERT(mac_srs->srs_oth_soft_rings != NULL); 3336 kmem_free(mac_srs->srs_oth_soft_rings, 3337 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3338 mac_srs->srs_oth_soft_rings = NULL; 3339 } 3340 } 3341 3342 /* 3343 * An RX SRS is attached to at most one mac_ring. 3344 * A TX SRS has no rings. 3345 */ 3346 static void 3347 mac_srs_ring_free(mac_soft_ring_set_t *mac_srs) 3348 { 3349 mac_client_impl_t *mcip; 3350 mac_ring_t *ring; 3351 flow_entry_t *flent; 3352 3353 ring = mac_srs->srs_ring; 3354 if (mac_srs->srs_type & SRST_TX) { 3355 ASSERT(ring == NULL); 3356 return; 3357 } 3358 3359 if (ring == NULL) 3360 return; 3361 3362 /* 3363 * Broadcast flows don't have a client impl association, but they 3364 * use only soft rings. 3365 */ 3366 flent = mac_srs->srs_flent; 3367 mcip = flent->fe_mcip; 3368 ASSERT(mcip != NULL); 3369 3370 ring->mr_classify_type = MAC_NO_CLASSIFIER; 3371 ring->mr_srs = NULL; 3372 } 3373 3374 /* 3375 * Physical unlink and free of the data structures happen below. This is 3376 * driven from mac_flow_destroy(), on the last refrele of a flow. 3377 * 3378 * Assumes Rx srs is 1-1 mapped with an ring. 3379 */ 3380 void 3381 mac_srs_free(mac_soft_ring_set_t *mac_srs) 3382 { 3383 ASSERT(mac_srs->srs_mcip == NULL || 3384 MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 3385 ASSERT((mac_srs->srs_state & (SRS_CONDEMNED | SRS_CONDEMNED_DONE | 3386 SRS_PROC | SRS_PROC_FAST)) == (SRS_CONDEMNED | SRS_CONDEMNED_DONE)); 3387 3388 mac_pkt_drop(NULL, NULL, mac_srs->srs_first, B_FALSE); 3389 mac_srs_ring_free(mac_srs); 3390 mac_srs_soft_rings_free(mac_srs); 3391 mac_srs_fanout_list_free(mac_srs); 3392 3393 mac_srs->srs_bw = NULL; 3394 mac_srs_stat_delete(mac_srs); 3395 kmem_cache_free(mac_srs_cache, mac_srs); 3396 } 3397 3398 static void 3399 mac_srs_soft_rings_quiesce(mac_soft_ring_set_t *mac_srs, uint_t s_ring_flag) 3400 { 3401 mac_soft_ring_t *softring; 3402 3403 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3404 3405 mac_srs_soft_rings_signal(mac_srs, s_ring_flag); 3406 if (s_ring_flag == S_RING_CONDEMNED) { 3407 while (mac_srs->srs_soft_ring_condemned_count != 3408 mac_srs->srs_soft_ring_count) 3409 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3410 } else { 3411 while (mac_srs->srs_soft_ring_quiesced_count != 3412 mac_srs->srs_soft_ring_count) 3413 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3414 } 3415 mutex_exit(&mac_srs->srs_lock); 3416 3417 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3418 softring = softring->s_ring_next) { 3419 (void) untimeout(softring->s_ring_tid); 3420 softring->s_ring_tid = NULL; 3421 } 3422 3423 (void) untimeout(mac_srs->srs_tid); 3424 mac_srs->srs_tid = NULL; 3425 3426 mutex_enter(&mac_srs->srs_lock); 3427 } 3428 3429 /* 3430 * The block comment above mac_rx_classify_flow_state_change explains the 3431 * background. At this point upcalls from the driver (both hardware classified 3432 * and software classified) have been cut off. We now need to quiesce the 3433 * SRS worker, poll, and softring threads. The SRS worker thread serves as 3434 * the master controller. The steps involved are described below in the function 3435 */ 3436 void 3437 mac_srs_worker_quiesce(mac_soft_ring_set_t *mac_srs) 3438 { 3439 uint_t s_ring_flag; 3440 uint_t srs_poll_wait_flag; 3441 3442 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3443 ASSERT(mac_srs->srs_state & (SRS_CONDEMNED | SRS_QUIESCE)); 3444 3445 if (mac_srs->srs_state & SRS_CONDEMNED) { 3446 s_ring_flag = S_RING_CONDEMNED; 3447 srs_poll_wait_flag = SRS_POLL_THR_EXITED; 3448 } else { 3449 s_ring_flag = S_RING_QUIESCE; 3450 srs_poll_wait_flag = SRS_POLL_THR_QUIESCED; 3451 } 3452 3453 /* 3454 * In the case of Rx SRS wait till the poll thread is done. 3455 */ 3456 if ((mac_srs->srs_type & SRST_TX) == 0 && 3457 mac_srs->srs_poll_thr != NULL) { 3458 while (!(mac_srs->srs_state & srs_poll_wait_flag)) 3459 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3460 3461 /* 3462 * Turn off polling as part of the quiesce operation. 3463 */ 3464 MAC_SRS_POLLING_OFF(mac_srs); 3465 mac_srs->srs_state &= ~(SRS_POLLING | SRS_GET_PKTS); 3466 } 3467 3468 /* 3469 * Then signal the soft ring worker threads to quiesce or quit 3470 * as needed and then wait till that happens. 3471 */ 3472 mac_srs_soft_rings_quiesce(mac_srs, s_ring_flag); 3473 3474 if (mac_srs->srs_state & SRS_CONDEMNED) 3475 mac_srs->srs_state |= (SRS_QUIESCE_DONE | SRS_CONDEMNED_DONE); 3476 else 3477 mac_srs->srs_state |= SRS_QUIESCE_DONE; 3478 cv_signal(&mac_srs->srs_quiesce_done_cv); 3479 } 3480 3481 /* 3482 * Signal an SRS to start a temporary quiesce, or permanent removal, or restart 3483 * a quiesced SRS by setting the appropriate flags and signaling the SRS worker 3484 * or poll thread. This function is internal to the quiescing logic and is 3485 * called internally from the SRS quiesce or flow quiesce or client quiesce 3486 * higher level functions. 3487 */ 3488 void 3489 mac_srs_signal(mac_soft_ring_set_t *mac_srs, uint_t srs_flag) 3490 { 3491 mac_ring_t *ring; 3492 3493 ring = mac_srs->srs_ring; 3494 ASSERT(ring == NULL || ring->mr_refcnt == 0); 3495 3496 if (srs_flag == SRS_CONDEMNED) { 3497 /* 3498 * The SRS is going away. We need to unbind the SRS and SR 3499 * threads before removing from the global SRS list. Otherwise 3500 * there is a small window where the cpu reconfig callbacks 3501 * may miss the SRS in the list walk and DR could fail since 3502 * there are still bound threads. 3503 */ 3504 mac_srs_threads_unbind(mac_srs); 3505 mac_srs_remove_glist(mac_srs); 3506 } 3507 /* 3508 * Wakeup the SRS worker and poll threads. 3509 */ 3510 mutex_enter(&mac_srs->srs_lock); 3511 mac_srs->srs_state |= srs_flag; 3512 cv_signal(&mac_srs->srs_async); 3513 cv_signal(&mac_srs->srs_cv); 3514 mutex_exit(&mac_srs->srs_lock); 3515 } 3516 3517 /* 3518 * In the Rx side, the quiescing is done bottom up. After the Rx upcalls 3519 * from the driver are done, then the Rx SRS is quiesced and only then can 3520 * we signal the soft rings. Thus this function can't be called arbitrarily 3521 * without satisfying the prerequisites. On the Tx side, the threads from 3522 * top need to quiesced, then the Tx SRS and only then can we signal the 3523 * Tx soft rings. 3524 */ 3525 static void 3526 mac_srs_soft_rings_signal(mac_soft_ring_set_t *mac_srs, uint_t sr_flag) 3527 { 3528 mac_soft_ring_t *softring; 3529 3530 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3531 softring = softring->s_ring_next) 3532 mac_soft_ring_signal(softring, sr_flag); 3533 } 3534 3535 /* 3536 * The block comment above mac_rx_classify_flow_state_change explains the 3537 * background. At this point the SRS is quiesced and we need to restart the 3538 * SRS worker, poll, and softring threads. The SRS worker thread serves as 3539 * the master controller. The steps involved are described below in the function 3540 */ 3541 void 3542 mac_srs_worker_restart(mac_soft_ring_set_t *mac_srs) 3543 { 3544 boolean_t iam_rx_srs; 3545 mac_soft_ring_t *softring; 3546 3547 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3548 if ((mac_srs->srs_type & SRST_TX) != 0) { 3549 iam_rx_srs = B_FALSE; 3550 ASSERT((mac_srs->srs_state & 3551 (SRS_POLL_THR_QUIESCED | SRS_QUIESCE_DONE | SRS_QUIESCE)) == 3552 (SRS_QUIESCE_DONE | SRS_QUIESCE)); 3553 } else { 3554 iam_rx_srs = B_TRUE; 3555 ASSERT((mac_srs->srs_state & 3556 (SRS_QUIESCE_DONE | SRS_QUIESCE)) == 3557 (SRS_QUIESCE_DONE | SRS_QUIESCE)); 3558 if (mac_srs->srs_poll_thr != NULL) { 3559 ASSERT((mac_srs->srs_state & SRS_POLL_THR_QUIESCED) == 3560 SRS_POLL_THR_QUIESCED); 3561 } 3562 } 3563 3564 /* 3565 * Signal any quiesced soft ring workers to restart and wait for the 3566 * soft ring down count to come down to zero. 3567 */ 3568 if (mac_srs->srs_soft_ring_quiesced_count != 0) { 3569 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3570 softring = softring->s_ring_next) { 3571 if (!(softring->s_ring_state & S_RING_QUIESCE)) 3572 continue; 3573 mac_soft_ring_signal(softring, S_RING_RESTART); 3574 } 3575 while (mac_srs->srs_soft_ring_quiesced_count != 0) 3576 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3577 } 3578 3579 mac_srs->srs_state &= ~(SRS_QUIESCE_DONE | SRS_QUIESCE | SRS_RESTART); 3580 if (iam_rx_srs && mac_srs->srs_poll_thr != NULL) { 3581 /* 3582 * Signal the poll thread and ask it to restart. Wait till it 3583 * actually restarts and the SRS_POLL_THR_QUIESCED flag gets 3584 * cleared. 3585 */ 3586 mac_srs->srs_state |= SRS_POLL_THR_RESTART; 3587 cv_signal(&mac_srs->srs_cv); 3588 while (mac_srs->srs_state & SRS_POLL_THR_QUIESCED) 3589 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3590 ASSERT(!(mac_srs->srs_state & SRS_POLL_THR_RESTART)); 3591 } 3592 /* Wake up any waiter waiting for the restart to complete */ 3593 mac_srs->srs_state |= SRS_RESTART_DONE; 3594 cv_signal(&mac_srs->srs_quiesce_done_cv); 3595 } 3596 3597 static void 3598 mac_srs_worker_unbind(mac_soft_ring_set_t *mac_srs) 3599 { 3600 mutex_enter(&mac_srs->srs_lock); 3601 if (!(mac_srs->srs_state & SRS_WORKER_BOUND)) { 3602 ASSERT(mac_srs->srs_worker_cpuid == -1); 3603 mutex_exit(&mac_srs->srs_lock); 3604 return; 3605 } 3606 3607 mac_srs->srs_worker_cpuid = -1; 3608 mac_srs->srs_state &= ~SRS_WORKER_BOUND; 3609 thread_affinity_clear(mac_srs->srs_worker); 3610 mutex_exit(&mac_srs->srs_lock); 3611 } 3612 3613 static void 3614 mac_srs_poll_unbind(mac_soft_ring_set_t *mac_srs) 3615 { 3616 mutex_enter(&mac_srs->srs_lock); 3617 if (mac_srs->srs_poll_thr == NULL || 3618 (mac_srs->srs_state & SRS_POLL_BOUND) == 0) { 3619 ASSERT(mac_srs->srs_poll_cpuid == -1); 3620 mutex_exit(&mac_srs->srs_lock); 3621 return; 3622 } 3623 3624 mac_srs->srs_poll_cpuid = -1; 3625 mac_srs->srs_state &= ~SRS_POLL_BOUND; 3626 thread_affinity_clear(mac_srs->srs_poll_thr); 3627 mutex_exit(&mac_srs->srs_lock); 3628 } 3629 3630 static void 3631 mac_srs_threads_unbind(mac_soft_ring_set_t *mac_srs) 3632 { 3633 mac_soft_ring_t *soft_ring; 3634 3635 ASSERT(MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 3636 3637 mutex_enter(&cpu_lock); 3638 mac_srs_worker_unbind(mac_srs); 3639 if (!(mac_srs->srs_type & SRST_TX)) 3640 mac_srs_poll_unbind(mac_srs); 3641 3642 for (soft_ring = mac_srs->srs_soft_ring_head; soft_ring != NULL; 3643 soft_ring = soft_ring->s_ring_next) { 3644 mac_soft_ring_unbind(soft_ring); 3645 } 3646 mutex_exit(&cpu_lock); 3647 } 3648 3649 /* 3650 * When a CPU is going away, unbind all MAC threads which are bound 3651 * to that CPU. The affinity of the thread to the CPU is saved to allow 3652 * the thread to be rebound to the CPU if it comes back online. 3653 */ 3654 static void 3655 mac_walk_srs_and_unbind(int cpuid) 3656 { 3657 mac_soft_ring_set_t *mac_srs; 3658 mac_soft_ring_t *soft_ring; 3659 3660 rw_enter(&mac_srs_g_lock, RW_READER); 3661 3662 if ((mac_srs = mac_srs_g_list) == NULL) 3663 goto done; 3664 3665 for (; mac_srs != NULL; mac_srs = mac_srs->srs_next) { 3666 if (mac_srs->srs_worker_cpuid == cpuid) { 3667 mac_srs->srs_worker_cpuid_save = cpuid; 3668 mac_srs_worker_unbind(mac_srs); 3669 } 3670 3671 if (!(mac_srs->srs_type & SRST_TX)) { 3672 if (mac_srs->srs_poll_cpuid == cpuid) { 3673 mac_srs->srs_poll_cpuid_save = cpuid; 3674 mac_srs_poll_unbind(mac_srs); 3675 } 3676 } 3677 3678 /* Next tackle the soft rings associated with the srs */ 3679 mutex_enter(&mac_srs->srs_lock); 3680 for (soft_ring = mac_srs->srs_soft_ring_head; soft_ring != NULL; 3681 soft_ring = soft_ring->s_ring_next) { 3682 if (soft_ring->s_ring_cpuid == cpuid) { 3683 soft_ring->s_ring_cpuid_save = cpuid; 3684 mac_soft_ring_unbind(soft_ring); 3685 } 3686 } 3687 mutex_exit(&mac_srs->srs_lock); 3688 } 3689 done: 3690 rw_exit(&mac_srs_g_lock); 3691 } 3692 3693 /* TX SETUP and TEARDOWN ROUTINES */ 3694 3695 /* 3696 * XXXHIO need to make sure the two mac_tx_srs_{add,del}_ring() 3697 * handle the case where the number of rings is one. I.e. there is 3698 * a ring pointed to by mac_srs->srs_tx_arg2. 3699 */ 3700 void 3701 mac_tx_srs_add_ring(mac_soft_ring_set_t *mac_srs, mac_ring_t *tx_ring) 3702 { 3703 mac_client_impl_t *mcip = mac_srs->srs_mcip; 3704 mac_soft_ring_t *soft_ring; 3705 int count = mac_srs->srs_tx_ring_count; 3706 uint32_t soft_ring_type = ST_RING_TX; 3707 uint_t ring_info; 3708 3709 ASSERT(mac_srs->srs_state & SRS_QUIESCE); 3710 ring_info = mac_hwring_getinfo((mac_ring_handle_t)tx_ring); 3711 if (mac_tx_serialize || (ring_info & MAC_RING_TX_SERIALIZE)) 3712 soft_ring_type |= ST_RING_WORKER_ONLY; 3713 soft_ring = mac_soft_ring_create(count, 0, 3714 soft_ring_type, maxclsyspri, mcip, mac_srs, -1, 3715 NULL, mcip, (mac_resource_handle_t)tx_ring); 3716 mac_srs->srs_tx_ring_count++; 3717 mac_srs_update_fanout_list(mac_srs); 3718 /* 3719 * put this soft ring in quiesce mode too so when we restart 3720 * all soft rings in the srs are in the same state. 3721 */ 3722 mac_soft_ring_signal(soft_ring, S_RING_QUIESCE); 3723 } 3724 3725 static void 3726 mac_soft_ring_remove(mac_soft_ring_set_t *mac_srs, mac_soft_ring_t *softring) 3727 { 3728 int sringcnt; 3729 3730 mutex_enter(&mac_srs->srs_lock); 3731 sringcnt = mac_srs->srs_soft_ring_count; 3732 ASSERT(sringcnt > 0); 3733 mac_soft_ring_signal(softring, S_RING_CONDEMNED); 3734 3735 ASSERT(mac_srs->srs_soft_ring_condemned_count == 0); 3736 while (mac_srs->srs_soft_ring_condemned_count != 1) 3737 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3738 3739 if (softring == mac_srs->srs_soft_ring_head) { 3740 mac_srs->srs_soft_ring_head = softring->s_ring_next; 3741 if (mac_srs->srs_soft_ring_head != NULL) { 3742 mac_srs->srs_soft_ring_head->s_ring_prev = NULL; 3743 } else { 3744 mac_srs->srs_soft_ring_tail = NULL; 3745 } 3746 } else { 3747 softring->s_ring_prev->s_ring_next = 3748 softring->s_ring_next; 3749 if (softring->s_ring_next != NULL) { 3750 softring->s_ring_next->s_ring_prev = 3751 softring->s_ring_prev; 3752 } else { 3753 mac_srs->srs_soft_ring_tail = 3754 softring->s_ring_prev; 3755 } 3756 } 3757 mac_srs->srs_soft_ring_count--; 3758 3759 mac_srs->srs_soft_ring_condemned_count--; 3760 mutex_exit(&mac_srs->srs_lock); 3761 3762 mac_soft_ring_free(softring); 3763 } 3764 3765 void 3766 mac_tx_srs_del_ring(mac_soft_ring_set_t *mac_srs, mac_ring_t *tx_ring) 3767 { 3768 int i; 3769 mac_soft_ring_t *soft_ring, *remove_sring; 3770 mac_client_impl_t *mcip = mac_srs->srs_mcip; 3771 3772 mutex_enter(&mac_srs->srs_lock); 3773 for (i = 0; i < mac_srs->srs_tx_ring_count; i++) { 3774 soft_ring = mac_srs->srs_tx_soft_rings[i]; 3775 if (soft_ring->s_ring_tx_arg2 == tx_ring) 3776 break; 3777 } 3778 mutex_exit(&mac_srs->srs_lock); 3779 ASSERT(i < mac_srs->srs_tx_ring_count); 3780 remove_sring = soft_ring; 3781 /* 3782 * In the case of aggr, the soft ring associated with a Tx ring 3783 * is also stored in st_soft_rings[] array. That entry should 3784 * be removed. 3785 */ 3786 if (mcip->mci_state_flags & MCIS_IS_AGGR) { 3787 mac_srs_tx_t *tx = &mac_srs->srs_tx; 3788 3789 ASSERT(tx->st_soft_rings[tx_ring->mr_index] == remove_sring); 3790 tx->st_soft_rings[tx_ring->mr_index] = NULL; 3791 } 3792 mac_soft_ring_remove(mac_srs, remove_sring); 3793 mac_srs_update_fanout_list(mac_srs); 3794 } 3795 3796 /* 3797 * mac_tx_srs_setup(): 3798 * Used to setup Tx rings. If no free Tx ring is available, then default 3799 * Tx ring is used. 3800 */ 3801 void 3802 mac_tx_srs_setup(mac_client_impl_t *mcip, flow_entry_t *flent) 3803 { 3804 mac_impl_t *mip = mcip->mci_mip; 3805 mac_soft_ring_set_t *tx_srs = flent->fe_tx_srs; 3806 int i; 3807 int tx_ring_count = 0; 3808 uint32_t soft_ring_type; 3809 mac_group_t *grp = NULL; 3810 mac_ring_t *ring; 3811 mac_srs_tx_t *tx = &tx_srs->srs_tx; 3812 boolean_t is_aggr; 3813 uint_t ring_info = 0; 3814 3815 is_aggr = (mcip->mci_state_flags & MCIS_IS_AGGR) != 0; 3816 grp = flent->fe_tx_ring_group; 3817 if (grp == NULL) { 3818 ring = (mac_ring_t *)mip->mi_default_tx_ring; 3819 goto no_group; 3820 } 3821 tx_ring_count = grp->mrg_cur_count; 3822 ring = grp->mrg_rings; 3823 /* 3824 * An attempt is made to reserve 'tx_ring_count' number 3825 * of Tx rings. If tx_ring_count is 0, default Tx ring 3826 * is used. If it is 1, an attempt is made to reserve one 3827 * Tx ring. In both the cases, the ring information is 3828 * stored in Tx SRS. If multiple Tx rings are specified, 3829 * then each Tx ring will have a Tx-side soft ring. All 3830 * these soft rings will be hang off Tx SRS. 3831 */ 3832 switch (grp->mrg_state) { 3833 case MAC_GROUP_STATE_SHARED: 3834 case MAC_GROUP_STATE_RESERVED: 3835 if (tx_ring_count <= 1 && !is_aggr) { 3836 no_group: 3837 if (ring != NULL && 3838 ring->mr_state != MR_INUSE) { 3839 (void) mac_start_ring(ring); 3840 ring_info = mac_hwring_getinfo( 3841 (mac_ring_handle_t)ring); 3842 } 3843 tx->st_arg2 = (void *)ring; 3844 mac_tx_srs_stat_recreate(tx_srs, B_FALSE); 3845 if (tx_srs->srs_type & SRST_BW_CONTROL) { 3846 tx->st_mode = SRS_TX_BW; 3847 } else if (mac_tx_serialize || 3848 (ring_info & MAC_RING_TX_SERIALIZE)) { 3849 tx->st_mode = SRS_TX_SERIALIZE; 3850 } else { 3851 tx->st_mode = SRS_TX_DEFAULT; 3852 } 3853 break; 3854 } 3855 soft_ring_type = ST_RING_TX; 3856 if (tx_srs->srs_type & SRST_BW_CONTROL) { 3857 tx->st_mode = is_aggr ? 3858 SRS_TX_BW_AGGR : SRS_TX_BW_FANOUT; 3859 } else { 3860 tx->st_mode = is_aggr ? SRS_TX_AGGR : 3861 SRS_TX_FANOUT; 3862 } 3863 for (i = 0; i < tx_ring_count; i++) { 3864 ASSERT(ring != NULL); 3865 switch (ring->mr_state) { 3866 case MR_INUSE: 3867 case MR_FREE: 3868 ASSERT(ring->mr_srs == NULL); 3869 3870 if (ring->mr_state != MR_INUSE) 3871 (void) mac_start_ring(ring); 3872 ring_info = mac_hwring_getinfo( 3873 (mac_ring_handle_t)ring); 3874 if (mac_tx_serialize || (ring_info & 3875 MAC_RING_TX_SERIALIZE)) { 3876 soft_ring_type |= 3877 ST_RING_WORKER_ONLY; 3878 } 3879 (void) mac_soft_ring_create(i, 0, 3880 soft_ring_type, maxclsyspri, 3881 mcip, tx_srs, -1, NULL, mcip, 3882 (mac_resource_handle_t)ring); 3883 break; 3884 default: 3885 cmn_err(CE_PANIC, 3886 "srs_setup: mcip = %p " 3887 "trying to add UNKNOWN ring = %p\n", 3888 (void *)mcip, (void *)ring); 3889 break; 3890 } 3891 ring = ring->mr_next; 3892 } 3893 mac_srs_update_fanout_list(tx_srs); 3894 break; 3895 default: 3896 ASSERT(B_FALSE); 3897 break; 3898 } 3899 tx->st_func = mac_tx_get_func(tx->st_mode); 3900 if (is_aggr) { 3901 VERIFY(i_mac_capab_get((mac_handle_t)mip, 3902 MAC_CAPAB_AGGR, &tx->st_capab_aggr)); 3903 } 3904 DTRACE_PROBE3(tx__srs___setup__return, mac_soft_ring_set_t *, tx_srs, 3905 int, tx->st_mode, int, tx_srs->srs_tx_ring_count); 3906 } 3907 3908 /* 3909 * Update the fanout of a client if its recorded link speed doesn't match 3910 * its current link speed. 3911 */ 3912 void 3913 mac_fanout_recompute_client(mac_client_impl_t *mcip, cpupart_t *cpupart) 3914 { 3915 uint64_t link_speed; 3916 mac_resource_props_t *mcip_mrp; 3917 flow_entry_t *flent = mcip->mci_flent; 3918 mac_soft_ring_set_t *rx_srs; 3919 mac_cpus_t *srs_cpu; 3920 int soft_ring_count, maxcpus; 3921 3922 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 3923 3924 link_speed = mac_client_stat_get(mcip->mci_flent->fe_mcip, 3925 MAC_STAT_IFSPEED); 3926 3927 if ((link_speed != 0) && 3928 (link_speed != mcip->mci_flent->fe_nic_speed)) { 3929 mcip_mrp = MCIP_RESOURCE_PROPS(mcip); 3930 /* 3931 * Before calling mac_fanout_setup(), check to see if 3932 * the SRSes already have the right number of soft 3933 * rings. mac_fanout_setup() is a heavy duty operation 3934 * where new cpu bindings are done for SRS and soft 3935 * ring threads and interrupts re-targeted. 3936 */ 3937 maxcpus = (cpupart != NULL) ? cpupart->cp_ncpus : ncpus; 3938 soft_ring_count = mac_compute_soft_ring_count(flent, 3939 flent->fe_rx_srs_cnt - 1, maxcpus); 3940 /* 3941 * If soft_ring_count returned by 3942 * mac_compute_soft_ring_count() is 0, bump it 3943 * up by 1 because we always have atleast one 3944 * TCP, UDP, and OTH soft ring associated with 3945 * an SRS. 3946 */ 3947 soft_ring_count = (soft_ring_count == 0) ? 3948 1 : soft_ring_count; 3949 rx_srs = flent->fe_rx_srs[0]; 3950 srs_cpu = &rx_srs->srs_cpu; 3951 if (soft_ring_count != srs_cpu->mc_rx_fanout_cnt) { 3952 mac_fanout_setup(mcip, flent, mcip_mrp, 3953 mac_rx_deliver, mcip, NULL, cpupart); 3954 } 3955 } 3956 } 3957 3958 /* 3959 * Walk through the list of mac clients for the MAC. 3960 * For each active mac client, recompute the number of soft rings 3961 * associated with every client, only if current speed is different 3962 * from the speed that was previously used for soft ring computation. 3963 * If the cable is disconnected whlie the NIC is started, we would get 3964 * notification with speed set to 0. We do not recompute in that case. 3965 */ 3966 void 3967 mac_fanout_recompute(mac_impl_t *mip) 3968 { 3969 mac_client_impl_t *mcip; 3970 cpupart_t *cpupart; 3971 boolean_t use_default; 3972 mac_resource_props_t *mrp, *emrp; 3973 3974 i_mac_perim_enter(mip); 3975 if ((mip->mi_state_flags & MIS_IS_VNIC) != 0 || 3976 mip->mi_linkstate != LINK_STATE_UP) { 3977 i_mac_perim_exit(mip); 3978 return; 3979 } 3980 3981 for (mcip = mip->mi_clients_list; mcip != NULL; 3982 mcip = mcip->mci_client_next) { 3983 if ((mcip->mci_state_flags & MCIS_SHARE_BOUND) != 0 || 3984 !MCIP_DATAPATH_SETUP(mcip)) 3985 continue; 3986 mrp = MCIP_RESOURCE_PROPS(mcip); 3987 emrp = MCIP_EFFECTIVE_PROPS(mcip); 3988 use_default = B_FALSE; 3989 pool_lock(); 3990 cpupart = mac_pset_find(mrp, &use_default); 3991 mac_fanout_recompute_client(mcip, cpupart); 3992 mac_set_pool_effective(use_default, cpupart, mrp, emrp); 3993 pool_unlock(); 3994 } 3995 i_mac_perim_exit(mip); 3996 } 3997 3998 /* 3999 * Given a MAC, change the polling state for all its MAC clients. 'enable' is 4000 * B_TRUE to enable polling or B_FALSE to disable. Polling is enabled by 4001 * default. 4002 */ 4003 void 4004 mac_poll_state_change(mac_handle_t mh, boolean_t enable) 4005 { 4006 mac_impl_t *mip = (mac_impl_t *)mh; 4007 mac_client_impl_t *mcip; 4008 4009 i_mac_perim_enter(mip); 4010 if (enable) 4011 mip->mi_state_flags &= ~MIS_POLL_DISABLE; 4012 else 4013 mip->mi_state_flags |= MIS_POLL_DISABLE; 4014 for (mcip = mip->mi_clients_list; mcip != NULL; 4015 mcip = mcip->mci_client_next) 4016 mac_client_update_classifier(mcip, B_TRUE); 4017 i_mac_perim_exit(mip); 4018 } 4019