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 (-1); /* No matching CPU found online */ 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 = (mac_intr_enable_t)mac_soft_ring_intr_enable; 1709 mrf.mrf_intr_disable = (mac_intr_disable_t)mac_soft_ring_intr_disable; 1710 mrf.mrf_flow_priority = pri; 1711 1712 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1713 (type|ST_RING_TCP), pri, mcip, mac_srs, 1714 cpuid, rx_func, x_arg1, x_arg2); 1715 softring->s_ring_rx_arg2 = NULL; 1716 1717 /* 1718 * TCP and UDP support DLS bypass. In addition TCP 1719 * squeue can also poll their corresponding soft rings. 1720 */ 1721 if (set_bypass && (mcip->mci_resource_arg != NULL)) { 1722 mac_soft_ring_dls_bypass(softring, 1723 mcip->mci_direct_rx_fn, 1724 mcip->mci_direct_rx_arg); 1725 1726 mrf.mrf_rx_arg = softring; 1727 mrf.mrf_intr_handle = (mac_intr_handle_t)softring; 1728 1729 /* 1730 * Make a call in IP to get a TCP squeue assigned to 1731 * this softring to maintain full CPU locality through 1732 * the stack and allow the squeue to be able to poll 1733 * the softring so the flow control can be pushed 1734 * all the way to H/W. 1735 */ 1736 softring->s_ring_rx_arg2 = 1737 mcip->mci_resource_add((void *)mcip->mci_resource_arg, 1738 (mac_resource_t *)&mrf); 1739 } 1740 1741 /* 1742 * Non-TCP protocols don't support squeues. Hence we 1743 * don't make any ring addition callbacks for non-TCP 1744 * rings. Now create the UDP softring and allow it to 1745 * bypass the DLS layer. 1746 */ 1747 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1748 (type|ST_RING_UDP), pri, mcip, mac_srs, 1749 cpuid, rx_func, x_arg1, x_arg2); 1750 softring->s_ring_rx_arg2 = NULL; 1751 1752 if (set_bypass && (mcip->mci_resource_arg != NULL)) { 1753 mac_soft_ring_dls_bypass(softring, 1754 mcip->mci_direct_rx_fn, 1755 mcip->mci_direct_rx_arg); 1756 } 1757 1758 /* Create the Oth softrings which has to go through the DLS */ 1759 softring = mac_soft_ring_create(id, mac_soft_ring_worker_wait, 1760 (type|ST_RING_OTH), pri, mcip, mac_srs, 1761 cpuid, rx_func, x_arg1, x_arg2); 1762 softring->s_ring_rx_arg2 = NULL; 1763 } 1764 1765 /* 1766 * This routine associates a CPU or a set of CPU to process incoming 1767 * traffic from a mac client. If multiple CPUs are specified, then 1768 * so many soft rings are created with each soft ring worker thread 1769 * bound to a CPU in the set. Each soft ring in turn will be 1770 * associated with an squeue and the squeue will be moved to the 1771 * same CPU as that of the soft ring's. 1772 */ 1773 static void 1774 mac_srs_fanout_modify(mac_client_impl_t *mcip, mac_direct_rx_t rx_func, 1775 void *x_arg1, mac_resource_handle_t x_arg2, 1776 mac_soft_ring_set_t *mac_rx_srs, mac_soft_ring_set_t *mac_tx_srs) 1777 { 1778 mac_soft_ring_t *softring; 1779 uint32_t soft_ring_flag = 0; 1780 processorid_t cpuid = -1; 1781 int i, srings_present, new_fanout_cnt; 1782 mac_cpus_t *srs_cpu; 1783 1784 /* fanout state is REINIT. Set it back to INIT */ 1785 ASSERT(mac_rx_srs->srs_fanout_state == SRS_FANOUT_REINIT); 1786 mac_rx_srs->srs_fanout_state = SRS_FANOUT_INIT; 1787 1788 /* how many are present right now */ 1789 srings_present = mac_rx_srs->srs_tcp_ring_count; 1790 /* new request */ 1791 srs_cpu = &mac_rx_srs->srs_cpu; 1792 new_fanout_cnt = srs_cpu->mc_rx_fanout_cnt; 1793 1794 mutex_enter(&mac_rx_srs->srs_lock); 1795 if (mac_rx_srs->srs_type & SRST_BW_CONTROL) 1796 soft_ring_flag |= ST_RING_BW_CTL; 1797 mutex_exit(&mac_rx_srs->srs_lock); 1798 1799 if (new_fanout_cnt > srings_present) { 1800 /* soft rings increased */ 1801 mutex_enter(&mac_rx_srs->srs_lock); 1802 mac_rx_srs->srs_type |= SRST_FANOUT_SRC_IP; 1803 mutex_exit(&mac_rx_srs->srs_lock); 1804 1805 for (i = mac_rx_srs->srs_tcp_ring_count; 1806 i < new_fanout_cnt; i++) { 1807 /* 1808 * Create the protocol softrings and set the 1809 * DLS bypass where possible. 1810 */ 1811 mac_srs_create_proto_softrings(i, soft_ring_flag, 1812 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1813 rx_func, x_arg1, x_arg2, B_TRUE); 1814 } 1815 mac_srs_update_fanout_list(mac_rx_srs); 1816 } else if (new_fanout_cnt < srings_present) { 1817 /* soft rings decreased */ 1818 if (new_fanout_cnt == 1) { 1819 mutex_enter(&mac_rx_srs->srs_lock); 1820 mac_rx_srs->srs_type &= ~SRST_FANOUT_SRC_IP; 1821 ASSERT(mac_rx_srs->srs_type & SRST_FANOUT_PROTO); 1822 mutex_exit(&mac_rx_srs->srs_lock); 1823 } 1824 /* Get rid of extra soft rings */ 1825 for (i = new_fanout_cnt; 1826 i < mac_rx_srs->srs_tcp_ring_count; i++) { 1827 softring = mac_rx_srs->srs_tcp_soft_rings[i]; 1828 if (softring->s_ring_rx_arg2 != NULL) { 1829 mcip->mci_resource_remove( 1830 (void *)mcip->mci_resource_arg, 1831 softring->s_ring_rx_arg2); 1832 } 1833 mac_soft_ring_remove(mac_rx_srs, 1834 mac_rx_srs->srs_tcp_soft_rings[i]); 1835 mac_soft_ring_remove(mac_rx_srs, 1836 mac_rx_srs->srs_udp_soft_rings[i]); 1837 mac_soft_ring_remove(mac_rx_srs, 1838 mac_rx_srs->srs_oth_soft_rings[i]); 1839 } 1840 mac_srs_update_fanout_list(mac_rx_srs); 1841 } 1842 1843 ASSERT(new_fanout_cnt == mac_rx_srs->srs_tcp_ring_count); 1844 mutex_enter(&cpu_lock); 1845 for (i = 0; i < mac_rx_srs->srs_tcp_ring_count; i++) { 1846 cpuid = srs_cpu->mc_rx_fanout_cpus[i]; 1847 (void) mac_soft_ring_bind(mac_rx_srs->srs_udp_soft_rings[i], 1848 cpuid); 1849 (void) mac_soft_ring_bind(mac_rx_srs->srs_oth_soft_rings[i], 1850 cpuid); 1851 (void) mac_soft_ring_bind(mac_rx_srs->srs_tcp_soft_rings[i], 1852 cpuid); 1853 softring = mac_rx_srs->srs_tcp_soft_rings[i]; 1854 if (softring->s_ring_rx_arg2 != NULL) { 1855 mcip->mci_resource_bind((void *)mcip->mci_resource_arg, 1856 softring->s_ring_rx_arg2, cpuid); 1857 } 1858 } 1859 1860 mac_srs_worker_bind(mac_rx_srs, srs_cpu->mc_rx_workerid); 1861 mac_srs_poll_bind(mac_rx_srs, srs_cpu->mc_rx_pollid); 1862 mac_rx_srs_retarget_intr(mac_rx_srs, srs_cpu->mc_rx_intr_cpu); 1863 /* 1864 * Bind Tx srs and soft ring threads too. Let's bind tx 1865 * srs to the last cpu in mrp list. 1866 */ 1867 if (mac_tx_srs != NULL) { 1868 BIND_TX_SRS_AND_SOFT_RINGS(mac_tx_srs, mrp); 1869 mac_tx_srs_retarget_intr(mac_tx_srs); 1870 } 1871 mutex_exit(&cpu_lock); 1872 } 1873 1874 /* 1875 * Bind SRS threads and soft rings to CPUs/create fanout list. 1876 */ 1877 void 1878 mac_srs_fanout_init(mac_client_impl_t *mcip, mac_resource_props_t *mrp, 1879 mac_direct_rx_t rx_func, void *x_arg1, mac_resource_handle_t x_arg2, 1880 mac_soft_ring_set_t *mac_rx_srs, mac_soft_ring_set_t *mac_tx_srs, 1881 cpupart_t *cpupart) 1882 { 1883 int i; 1884 processorid_t cpuid; 1885 uint32_t soft_ring_flag = 0; 1886 int soft_ring_cnt; 1887 mac_cpus_t *srs_cpu = &mac_rx_srs->srs_cpu; 1888 1889 /* 1890 * Remove the no soft ring flag and we will adjust it 1891 * appropriately further down. 1892 */ 1893 mutex_enter(&mac_rx_srs->srs_lock); 1894 mac_rx_srs->srs_type &= ~SRST_NO_SOFT_RINGS; 1895 mutex_exit(&mac_rx_srs->srs_lock); 1896 1897 ASSERT(mac_rx_srs->srs_soft_ring_head == NULL); 1898 1899 if (mac_rx_srs->srs_type & SRST_BW_CONTROL) 1900 soft_ring_flag |= ST_RING_BW_CTL; 1901 1902 ASSERT(mac_rx_srs->srs_fanout_state == SRS_FANOUT_UNINIT); 1903 mac_rx_srs->srs_fanout_state = SRS_FANOUT_INIT; 1904 /* 1905 * Ring count can be 0 if no fanout is required and no cpu 1906 * were specified. Leave the SRS worker and poll thread 1907 * unbound 1908 */ 1909 ASSERT(mrp != NULL); 1910 soft_ring_cnt = srs_cpu->mc_rx_fanout_cnt; 1911 1912 /* Step 1: bind cpu contains cpu list where threads need to bind */ 1913 if (soft_ring_cnt > 0) { 1914 mutex_enter(&cpu_lock); 1915 for (i = 0; i < soft_ring_cnt; i++) { 1916 cpuid = srs_cpu->mc_rx_fanout_cpus[i]; 1917 /* Create the protocol softrings */ 1918 mac_srs_create_proto_softrings(i, soft_ring_flag, 1919 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1920 rx_func, x_arg1, x_arg2, B_FALSE); 1921 } 1922 mac_srs_worker_bind(mac_rx_srs, srs_cpu->mc_rx_workerid); 1923 mac_srs_poll_bind(mac_rx_srs, srs_cpu->mc_rx_pollid); 1924 mac_rx_srs_retarget_intr(mac_rx_srs, srs_cpu->mc_rx_intr_cpu); 1925 /* 1926 * Bind Tx srs and soft ring threads too. 1927 * Let's bind tx srs to the last cpu in 1928 * mrp list. 1929 */ 1930 if (mac_tx_srs == NULL) { 1931 mutex_exit(&cpu_lock); 1932 goto alldone; 1933 } 1934 1935 BIND_TX_SRS_AND_SOFT_RINGS(mac_tx_srs, mrp); 1936 mac_tx_srs_retarget_intr(mac_tx_srs); 1937 mutex_exit(&cpu_lock); 1938 } else { 1939 mutex_enter(&cpu_lock); 1940 /* 1941 * For a subflow, mrp_workerid and mrp_pollid 1942 * is not set. 1943 */ 1944 mac_srs_worker_bind(mac_rx_srs, mrp->mrp_rx_workerid); 1945 mac_srs_poll_bind(mac_rx_srs, mrp->mrp_rx_pollid); 1946 mutex_exit(&cpu_lock); 1947 goto no_softrings; 1948 } 1949 1950 alldone: 1951 if (soft_ring_cnt > 1) 1952 mac_rx_srs->srs_type |= SRST_FANOUT_SRC_IP; 1953 mac_srs_update_fanout_list(mac_rx_srs); 1954 mac_srs_client_poll_enable(mcip, mac_rx_srs); 1955 return; 1956 1957 no_softrings: 1958 if (mac_rx_srs->srs_type & SRST_FANOUT_PROTO) { 1959 mutex_enter(&cpu_lock); 1960 cpuid = mac_next_bind_cpu(cpupart); 1961 /* Create the protocol softrings */ 1962 mac_srs_create_proto_softrings(0, soft_ring_flag, 1963 mac_rx_srs->srs_pri, mcip, mac_rx_srs, cpuid, 1964 rx_func, x_arg1, x_arg2, B_FALSE); 1965 mutex_exit(&cpu_lock); 1966 } else { 1967 /* 1968 * This is the case when there is no fanout which is 1969 * true for subflows. 1970 */ 1971 mac_rx_srs->srs_type |= SRST_NO_SOFT_RINGS; 1972 } 1973 mac_srs_update_fanout_list(mac_rx_srs); 1974 mac_srs_client_poll_enable(mcip, mac_rx_srs); 1975 } 1976 1977 /* 1978 * mac_fanout_setup: 1979 * 1980 * Calls mac_srs_fanout_init() or modify() depending upon whether 1981 * the SRS is getting initialized or re-initialized. 1982 */ 1983 void 1984 mac_fanout_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 1985 mac_resource_props_t *mrp, mac_direct_rx_t rx_func, void *x_arg1, 1986 mac_resource_handle_t x_arg2, cpupart_t *cpupart) 1987 { 1988 mac_soft_ring_set_t *mac_rx_srs, *mac_tx_srs; 1989 int i, rx_srs_cnt; 1990 1991 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 1992 /* 1993 * This is an aggregation port. Fanout will be setup 1994 * over the aggregation itself. 1995 */ 1996 if (mcip->mci_state_flags & MCIS_EXCLUSIVE) 1997 return; 1998 1999 mac_rx_srs = flent->fe_rx_srs[0]; 2000 /* 2001 * Set up the fanout on the tx side only once, with the 2002 * first rx SRS. The CPU binding, fanout, and bandwidth 2003 * criteria are common to both RX and TX, so 2004 * initializing them along side avoids redundant code. 2005 */ 2006 mac_tx_srs = flent->fe_tx_srs; 2007 rx_srs_cnt = flent->fe_rx_srs_cnt; 2008 2009 /* No fanout for subflows */ 2010 if (flent->fe_type & FLOW_USER) { 2011 mac_srs_fanout_init(mcip, mrp, rx_func, 2012 x_arg1, x_arg2, mac_rx_srs, mac_tx_srs, 2013 cpupart); 2014 return; 2015 } 2016 2017 if (mrp->mrp_mask & MRP_CPUS_USERSPEC) 2018 mac_flow_user_cpu_init(flent, mrp); 2019 else 2020 mac_flow_cpu_init(flent, cpupart); 2021 2022 mrp->mrp_rx_fanout_cnt = mac_rx_srs->srs_cpu.mc_rx_fanout_cnt; 2023 2024 /* 2025 * Set up fanout for both SW (0th SRS) and HW classified 2026 * SRS (the rest of Rx SRSs in flent). 2027 */ 2028 for (i = 0; i < rx_srs_cnt; i++) { 2029 mac_rx_srs = flent->fe_rx_srs[i]; 2030 if (i != 0) 2031 mac_tx_srs = NULL; 2032 switch (mac_rx_srs->srs_fanout_state) { 2033 case SRS_FANOUT_UNINIT: 2034 mac_srs_fanout_init(mcip, mrp, rx_func, 2035 x_arg1, x_arg2, mac_rx_srs, mac_tx_srs, 2036 cpupart); 2037 break; 2038 case SRS_FANOUT_INIT: 2039 break; 2040 case SRS_FANOUT_REINIT: 2041 mac_rx_srs_quiesce(mac_rx_srs, SRS_QUIESCE); 2042 mac_srs_fanout_modify(mcip, rx_func, x_arg1, 2043 x_arg2, mac_rx_srs, mac_tx_srs); 2044 mac_rx_srs_restart(mac_rx_srs); 2045 break; 2046 default: 2047 VERIFY(mac_rx_srs->srs_fanout_state <= 2048 SRS_FANOUT_REINIT); 2049 break; 2050 } 2051 } 2052 } 2053 2054 /* 2055 * mac_srs_create: 2056 * 2057 * Create a mac_soft_ring_set_t (SRS). If soft_ring_fanout_type is 2058 * SRST_TX, an SRS for Tx side is created. Otherwise an SRS for Rx side 2059 * processing is created. 2060 * 2061 * Details on Rx SRS: 2062 * Create a SRS and also add the necessary soft rings for TCP and 2063 * non-TCP based on fanout type and count specified. 2064 * 2065 * mac_soft_ring_fanout, mac_srs_fanout_modify (?), 2066 * mac_soft_ring_stop_workers, mac_soft_ring_set_destroy, etc need 2067 * to be heavily modified. 2068 * 2069 * mi_soft_ring_list_size, mi_soft_ring_size, etc need to disappear. 2070 */ 2071 mac_soft_ring_set_t * 2072 mac_srs_create(mac_client_impl_t *mcip, flow_entry_t *flent, uint32_t srs_type, 2073 mac_direct_rx_t rx_func, void *x_arg1, mac_resource_handle_t x_arg2, 2074 mac_ring_t *ring) 2075 { 2076 mac_soft_ring_set_t *mac_srs; 2077 mac_srs_rx_t *srs_rx; 2078 mac_srs_tx_t *srs_tx; 2079 mac_bw_ctl_t *mac_bw; 2080 mac_resource_props_t *mrp; 2081 boolean_t is_tx_srs = ((srs_type & SRST_TX) != 0); 2082 2083 mac_srs = kmem_cache_alloc(mac_srs_cache, KM_SLEEP); 2084 bzero(mac_srs, sizeof (mac_soft_ring_set_t)); 2085 srs_rx = &mac_srs->srs_rx; 2086 srs_tx = &mac_srs->srs_tx; 2087 2088 mutex_enter(&flent->fe_lock); 2089 2090 /* 2091 * Get the bandwidth control structure from the flent. Get 2092 * rid of any residual values in the control structure for 2093 * the tx bw struct and also for the rx, if the rx srs is 2094 * the 1st one being brought up (the rx bw ctl struct may 2095 * be shared by multiple SRSs) 2096 */ 2097 if (is_tx_srs) { 2098 mac_srs->srs_bw = &flent->fe_tx_bw; 2099 bzero(mac_srs->srs_bw, sizeof (mac_bw_ctl_t)); 2100 flent->fe_tx_srs = mac_srs; 2101 } else { 2102 /* 2103 * The bw counter (stored in the flent) is shared 2104 * by SRS's within an rx group. 2105 */ 2106 mac_srs->srs_bw = &flent->fe_rx_bw; 2107 /* First rx SRS, clear the bw structure */ 2108 if (flent->fe_rx_srs_cnt == 0) 2109 bzero(mac_srs->srs_bw, sizeof (mac_bw_ctl_t)); 2110 2111 /* 2112 * It is better to panic here rather than just assert because 2113 * on a non-debug kernel we might end up courrupting memory 2114 * and making it difficult to debug. 2115 */ 2116 if (flent->fe_rx_srs_cnt >= MAX_RINGS_PER_GROUP) { 2117 panic("Array Overrun detected due to MAC client %p " 2118 " having more rings than %d", (void *)mcip, 2119 MAX_RINGS_PER_GROUP); 2120 } 2121 flent->fe_rx_srs[flent->fe_rx_srs_cnt] = mac_srs; 2122 flent->fe_rx_srs_cnt++; 2123 } 2124 mac_srs->srs_flent = flent; 2125 mutex_exit(&flent->fe_lock); 2126 2127 mac_srs->srs_state = 0; 2128 mac_srs->srs_type = (srs_type | SRST_NO_SOFT_RINGS); 2129 mac_srs->srs_worker_cpuid = mac_srs->srs_worker_cpuid_save = -1; 2130 mac_srs->srs_poll_cpuid = mac_srs->srs_poll_cpuid_save = -1; 2131 mac_srs->srs_mcip = mcip; 2132 mac_srs_fanout_list_alloc(mac_srs); 2133 2134 /* 2135 * For a flow we use the underlying MAC client's priority range with 2136 * the priority value to find an absolute priority value. For a MAC 2137 * client we use the MAC client's maximum priority as the value. 2138 */ 2139 mrp = &flent->fe_effective_props; 2140 if ((mac_srs->srs_type & SRST_FLOW) != 0) { 2141 mac_srs->srs_pri = FLOW_PRIORITY(mcip->mci_min_pri, 2142 mcip->mci_max_pri, mrp->mrp_priority); 2143 } else { 2144 mac_srs->srs_pri = mcip->mci_max_pri; 2145 } 2146 /* 2147 * We need to insert the SRS in the global list before 2148 * binding the SRS and SR threads. Otherwise there is a 2149 * is a small window where the cpu reconfig callbacks 2150 * may miss the SRS in the list walk and DR could fail 2151 * as there are bound threads. 2152 */ 2153 mac_srs_add_glist(mac_srs); 2154 2155 /* Initialize bw limit */ 2156 if ((mrp->mrp_mask & MRP_MAXBW) != 0) { 2157 mac_srs->srs_drain_func = mac_rx_srs_drain_bw; 2158 2159 mac_bw = mac_srs->srs_bw; 2160 mutex_enter(&mac_bw->mac_bw_lock); 2161 mac_bw->mac_bw_limit = FLOW_BYTES_PER_TICK(mrp->mrp_maxbw); 2162 2163 /* 2164 * Give twice the queuing capability before 2165 * dropping packets. The unit is bytes/tick. 2166 */ 2167 mac_bw->mac_bw_drop_threshold = mac_bw->mac_bw_limit << 1; 2168 mutex_exit(&mac_bw->mac_bw_lock); 2169 mac_srs->srs_type |= SRST_BW_CONTROL; 2170 } else { 2171 mac_srs->srs_drain_func = mac_rx_srs_drain; 2172 } 2173 2174 /* 2175 * We use the following policy to control Receive 2176 * Side Dynamic Polling: 2177 * 1) We switch to poll mode anytime the processing thread causes 2178 * a backlog to build up in SRS and its associated Soft Rings 2179 * (sr_poll_pkt_cnt > 0). 2180 * 2) As long as the backlog stays under the low water mark 2181 * (sr_lowat), we poll the H/W for more packets. 2182 * 3) If the backlog (sr_poll_pkt_cnt) exceeds low water mark, we 2183 * stay in poll mode but don't poll the H/W for more packets. 2184 * 4) Anytime in polling mode, if we poll the H/W for packets and 2185 * find nothing plus we have an existing backlog 2186 * (sr_poll_pkt_cnt > 0), we stay in polling mode but don't poll 2187 * the H/W for packets anymore (let the polling thread go to sleep). 2188 * 5) Once the backlog is relived (packets are processed) we reenable 2189 * polling (by signalling the poll thread) only when the backlog 2190 * dips below sr_poll_thres. 2191 * 6) sr_hiwat is used exclusively when we are not polling capable 2192 * and is used to decide when to drop packets so the SRS queue 2193 * length doesn't grow infinitely. 2194 */ 2195 if (!is_tx_srs) { 2196 srs_rx->sr_hiwat = mac_soft_ring_max_q_cnt; 2197 /* Low water mark needs to be less than high water mark */ 2198 srs_rx->sr_lowat = mac_soft_ring_min_q_cnt <= 2199 mac_soft_ring_max_q_cnt ? mac_soft_ring_min_q_cnt : 2200 (mac_soft_ring_max_q_cnt >> 2); 2201 /* Poll threshold need to be half of low water mark or less */ 2202 srs_rx->sr_poll_thres = mac_soft_ring_poll_thres <= 2203 (srs_rx->sr_lowat >> 1) ? mac_soft_ring_poll_thres : 2204 (srs_rx->sr_lowat >> 1); 2205 if (mac_latency_optimize) 2206 mac_srs->srs_state |= SRS_LATENCY_OPT; 2207 else 2208 mac_srs->srs_state |= SRS_SOFTRING_QUEUE; 2209 } 2210 2211 mac_srs->srs_worker = thread_create(NULL, 0, 2212 mac_srs_worker, mac_srs, 0, &p0, TS_RUN, mac_srs->srs_pri); 2213 2214 if (is_tx_srs) { 2215 /* Handle everything about Tx SRS and return */ 2216 mac_srs->srs_drain_func = mac_tx_srs_drain; 2217 srs_tx->st_max_q_cnt = mac_tx_srs_max_q_cnt; 2218 srs_tx->st_hiwat = 2219 (mac_tx_srs_hiwat > mac_tx_srs_max_q_cnt) ? 2220 mac_tx_srs_max_q_cnt : mac_tx_srs_hiwat; 2221 srs_tx->st_arg1 = x_arg1; 2222 srs_tx->st_arg2 = x_arg2; 2223 goto done; 2224 } 2225 2226 if ((srs_type & SRST_FLOW) != 0 || 2227 FLOW_TAB_EMPTY(mcip->mci_subflow_tab)) 2228 srs_rx->sr_lower_proc = mac_rx_srs_process; 2229 else 2230 srs_rx->sr_lower_proc = mac_rx_srs_subflow_process; 2231 2232 srs_rx->sr_func = rx_func; 2233 srs_rx->sr_arg1 = x_arg1; 2234 srs_rx->sr_arg2 = x_arg2; 2235 2236 if (ring != NULL) { 2237 uint_t ring_info; 2238 2239 /* Is the mac_srs created over the RX default group? */ 2240 if (ring->mr_gh == (mac_group_handle_t) 2241 MAC_DEFAULT_RX_GROUP(mcip->mci_mip)) { 2242 mac_srs->srs_type |= SRST_DEFAULT_GRP; 2243 } 2244 mac_srs->srs_ring = ring; 2245 ring->mr_srs = mac_srs; 2246 ring->mr_classify_type = MAC_HW_CLASSIFIER; 2247 ring->mr_flag |= MR_INCIPIENT; 2248 2249 if (!(mcip->mci_mip->mi_state_flags & MIS_POLL_DISABLE) && 2250 FLOW_TAB_EMPTY(mcip->mci_subflow_tab) && mac_poll_enable) 2251 mac_srs->srs_state |= SRS_POLLING_CAPAB; 2252 2253 mac_srs->srs_poll_thr = thread_create(NULL, 0, 2254 mac_rx_srs_poll_ring, mac_srs, 0, &p0, TS_RUN, 2255 mac_srs->srs_pri); 2256 /* 2257 * Some drivers require serialization and don't send 2258 * packet chains in interrupt context. For such 2259 * drivers, we should always queue in soft ring 2260 * so that we get a chance to switch into a polling 2261 * mode under backlog. 2262 */ 2263 ring_info = mac_hwring_getinfo((mac_ring_handle_t)ring); 2264 if (ring_info & MAC_RING_RX_ENQUEUE) 2265 mac_srs->srs_state |= SRS_SOFTRING_QUEUE; 2266 } 2267 done: 2268 mac_srs_stat_create(mac_srs); 2269 return (mac_srs); 2270 } 2271 2272 /* 2273 * Figure out the number of soft rings required. Its dependant on 2274 * if protocol fanout is required (for LINKs), global settings 2275 * require us to do fanout for performance (based on mac_soft_ring_enable), 2276 * or user has specifically requested fanout. 2277 */ 2278 static uint32_t 2279 mac_find_fanout(flow_entry_t *flent, uint32_t link_type) 2280 { 2281 uint32_t fanout_type; 2282 mac_resource_props_t *mrp = &flent->fe_effective_props; 2283 2284 /* no fanout for subflows */ 2285 switch (link_type) { 2286 case SRST_FLOW: 2287 fanout_type = SRST_NO_SOFT_RINGS; 2288 break; 2289 case SRST_LINK: 2290 fanout_type = SRST_FANOUT_PROTO; 2291 break; 2292 } 2293 2294 /* A primary NIC/link is being plumbed */ 2295 if (flent->fe_type & FLOW_PRIMARY_MAC) { 2296 if (mac_soft_ring_enable && mac_rx_soft_ring_count > 1) { 2297 fanout_type |= SRST_FANOUT_SRC_IP; 2298 } 2299 } else if (flent->fe_type & FLOW_VNIC) { 2300 /* A VNIC is being created */ 2301 if (mrp != NULL && mrp->mrp_ncpus > 0) { 2302 fanout_type |= SRST_FANOUT_SRC_IP; 2303 } 2304 } 2305 2306 return (fanout_type); 2307 } 2308 2309 /* 2310 * Change a group from h/w to s/w classification. 2311 */ 2312 void 2313 mac_rx_switch_grp_to_sw(mac_group_t *group) 2314 { 2315 mac_ring_t *ring; 2316 mac_soft_ring_set_t *mac_srs; 2317 2318 for (ring = group->mrg_rings; ring != NULL; ring = ring->mr_next) { 2319 if (ring->mr_classify_type == MAC_HW_CLASSIFIER) { 2320 /* 2321 * Remove the SRS associated with the HW ring. 2322 * As a result, polling will be disabled. 2323 */ 2324 mac_srs = ring->mr_srs; 2325 ASSERT(mac_srs != NULL); 2326 mac_rx_srs_remove(mac_srs); 2327 ring->mr_srs = NULL; 2328 } 2329 2330 if (ring->mr_state != MR_INUSE) 2331 (void) mac_start_ring(ring); 2332 2333 /* 2334 * We need to perform SW classification 2335 * for packets landing in these rings 2336 */ 2337 ring->mr_flag = 0; 2338 ring->mr_classify_type = MAC_SW_CLASSIFIER; 2339 } 2340 } 2341 2342 /* 2343 * Create the Rx SRS for S/W classifier and for each ring in the 2344 * group (if exclusive group). Also create the Tx SRS. 2345 */ 2346 void 2347 mac_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2348 uint32_t link_type) 2349 { 2350 cpupart_t *cpupart; 2351 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 2352 mac_resource_props_t *emrp = MCIP_EFFECTIVE_PROPS(mcip); 2353 boolean_t use_default = B_FALSE; 2354 2355 mac_rx_srs_group_setup(mcip, flent, link_type); 2356 mac_tx_srs_group_setup(mcip, flent, link_type); 2357 2358 pool_lock(); 2359 cpupart = mac_pset_find(mrp, &use_default); 2360 mac_fanout_setup(mcip, flent, MCIP_RESOURCE_PROPS(mcip), 2361 mac_rx_deliver, mcip, NULL, cpupart); 2362 mac_set_pool_effective(use_default, cpupart, mrp, emrp); 2363 pool_unlock(); 2364 } 2365 2366 /* 2367 * Set up the RX SRSs. If the S/W SRS is not set, set it up, if there 2368 * is a group associated with this MAC client, set up SRSs for individual 2369 * h/w rings. 2370 */ 2371 void 2372 mac_rx_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2373 uint32_t link_type) 2374 { 2375 mac_impl_t *mip = mcip->mci_mip; 2376 mac_soft_ring_set_t *mac_srs; 2377 mac_ring_t *ring; 2378 uint32_t fanout_type; 2379 mac_group_t *rx_group = flent->fe_rx_ring_group; 2380 2381 fanout_type = mac_find_fanout(flent, link_type); 2382 2383 /* Create the SRS for S/W classification if none exists */ 2384 if (flent->fe_rx_srs[0] == NULL) { 2385 ASSERT(flent->fe_rx_srs_cnt == 0); 2386 /* Setup the Rx SRS */ 2387 mac_srs = mac_srs_create(mcip, flent, fanout_type | link_type, 2388 mac_rx_deliver, mcip, NULL, NULL); 2389 mutex_enter(&flent->fe_lock); 2390 flent->fe_cb_fn = (flow_fn_t)mac_srs->srs_rx.sr_lower_proc; 2391 flent->fe_cb_arg1 = (void *)mip; 2392 flent->fe_cb_arg2 = (void *)mac_srs; 2393 mutex_exit(&flent->fe_lock); 2394 } 2395 2396 if (rx_group == NULL) 2397 return; 2398 /* 2399 * fanout for default SRS is done when default SRS are created 2400 * above. As each ring is added to the group, we setup the 2401 * SRS and fanout to it. 2402 */ 2403 switch (rx_group->mrg_state) { 2404 case MAC_GROUP_STATE_RESERVED: 2405 for (ring = rx_group->mrg_rings; ring != NULL; 2406 ring = ring->mr_next) { 2407 switch (ring->mr_state) { 2408 case MR_INUSE: 2409 case MR_FREE: 2410 if (ring->mr_srs != NULL) 2411 break; 2412 if (ring->mr_state != MR_INUSE) 2413 (void) mac_start_ring(ring); 2414 2415 /* 2416 * Since the group is exclusively ours create 2417 * an SRS for this ring to allow the 2418 * individual SRS to dynamically poll the 2419 * ring. Do this only if the client is not 2420 * a VLAN MAC client, since for VLAN we do 2421 * s/w classification for the VID check, and 2422 * if it has a unicast address. 2423 */ 2424 if ((mcip->mci_state_flags & 2425 MCIS_NO_UNICAST_ADDR) || 2426 i_mac_flow_vid(mcip->mci_flent) != 2427 VLAN_ID_NONE) { 2428 break; 2429 } 2430 mac_srs = mac_srs_create(mcip, flent, 2431 fanout_type | link_type, 2432 mac_rx_deliver, mcip, NULL, ring); 2433 break; 2434 default: 2435 cmn_err(CE_PANIC, 2436 "srs_setup: mcip = %p " 2437 "trying to add UNKNOWN ring = %p\n", 2438 (void *)mcip, (void *)ring); 2439 break; 2440 } 2441 } 2442 break; 2443 case MAC_GROUP_STATE_SHARED: 2444 /* 2445 * Set all rings of this group to software classified. 2446 * 2447 * If the group is current RESERVED, the existing mac 2448 * client (the only client on this group) is using 2449 * this group exclusively. In that case we need to 2450 * disable polling on the rings of the group (if it 2451 * was enabled), and free the SRS associated with the 2452 * rings. 2453 */ 2454 mac_rx_switch_grp_to_sw(rx_group); 2455 break; 2456 default: 2457 ASSERT(B_FALSE); 2458 break; 2459 } 2460 } 2461 2462 /* 2463 * Set up the TX SRS. 2464 */ 2465 void 2466 mac_tx_srs_group_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2467 uint32_t link_type) 2468 { 2469 int cnt; 2470 int ringcnt; 2471 mac_ring_t *ring; 2472 mac_group_t *grp; 2473 2474 /* 2475 * If we are opened exclusively (like aggr does for aggr_ports), 2476 * don't set up Tx SRS and Tx soft rings as they won't be used. 2477 * The same thing has to be done for Rx side also. See bug: 2478 * 6880080 2479 */ 2480 if (mcip->mci_state_flags & MCIS_EXCLUSIVE) { 2481 /* 2482 * If we have rings, start them here. 2483 */ 2484 if (flent->fe_tx_ring_group == NULL) 2485 return; 2486 grp = (mac_group_t *)flent->fe_tx_ring_group; 2487 ringcnt = grp->mrg_cur_count; 2488 ring = grp->mrg_rings; 2489 for (cnt = 0; cnt < ringcnt; cnt++) { 2490 if (ring->mr_state != MR_INUSE) { 2491 (void) mac_start_ring(ring); 2492 } 2493 ring = ring->mr_next; 2494 } 2495 return; 2496 } 2497 if (flent->fe_tx_srs == NULL) { 2498 (void) mac_srs_create(mcip, flent, SRST_TX | link_type, 2499 NULL, mcip, NULL, NULL); 2500 } 2501 mac_tx_srs_setup(mcip, flent); 2502 } 2503 2504 /* 2505 * Remove all the RX SRSs. If we want to remove only the SRSs associated 2506 * with h/w rings, leave the S/W SRS alone. This is used when we want to 2507 * move the MAC client from one group to another, so we need to teardown 2508 * on the h/w SRSs. 2509 */ 2510 void 2511 mac_rx_srs_group_teardown(flow_entry_t *flent, boolean_t hwonly) 2512 { 2513 mac_soft_ring_set_t *mac_srs; 2514 int i; 2515 int count = flent->fe_rx_srs_cnt; 2516 2517 for (i = 0; i < count; i++) { 2518 if (i == 0 && hwonly) 2519 continue; 2520 mac_srs = flent->fe_rx_srs[i]; 2521 mac_rx_srs_quiesce(mac_srs, SRS_CONDEMNED); 2522 mac_srs_free(mac_srs); 2523 flent->fe_rx_srs[i] = NULL; 2524 flent->fe_rx_srs_cnt--; 2525 } 2526 ASSERT(!hwonly || flent->fe_rx_srs_cnt == 1); 2527 ASSERT(hwonly || flent->fe_rx_srs_cnt == 0); 2528 } 2529 2530 /* 2531 * Remove the TX SRS. 2532 */ 2533 void 2534 mac_tx_srs_group_teardown(mac_client_impl_t *mcip, flow_entry_t *flent, 2535 uint32_t link_type) 2536 { 2537 mac_soft_ring_set_t *tx_srs; 2538 mac_srs_tx_t *tx; 2539 2540 if ((tx_srs = flent->fe_tx_srs) == NULL) 2541 return; 2542 2543 tx = &tx_srs->srs_tx; 2544 switch (link_type) { 2545 case SRST_FLOW: 2546 /* 2547 * For flows, we need to work with passed 2548 * flent to find the Rx/Tx SRS. 2549 */ 2550 mac_tx_srs_quiesce(tx_srs, SRS_CONDEMNED); 2551 break; 2552 case SRST_LINK: 2553 mac_tx_client_condemn((mac_client_handle_t)mcip); 2554 if (tx->st_arg2 != NULL) { 2555 ASSERT(tx_srs->srs_type & SRST_TX); 2556 /* 2557 * The ring itself will be stopped when 2558 * we release the group or in the 2559 * mac_datapath_teardown (for the default 2560 * group) 2561 */ 2562 tx->st_arg2 = NULL; 2563 } 2564 break; 2565 default: 2566 ASSERT(B_FALSE); 2567 break; 2568 } 2569 mac_srs_free(tx_srs); 2570 flent->fe_tx_srs = NULL; 2571 } 2572 2573 /* 2574 * This is the group state machine. 2575 * 2576 * The state of an Rx group is given by 2577 * the following table. The default group and its rings are started in 2578 * mac_start itself and the default group stays in SHARED state until 2579 * mac_stop at which time the group and rings are stopped and and it 2580 * reverts to the Registered state. 2581 * 2582 * Typically this function is called on a group after adding or removing a 2583 * client from it, to find out what should be the new state of the group. 2584 * If the new state is RESERVED, then the client that owns this group 2585 * exclusively is also returned. Note that adding or removing a client from 2586 * a group could also impact the default group and the caller needs to 2587 * evaluate the effect on the default group. 2588 * 2589 * Group type # of clients mi_nactiveclients Group State 2590 * in the group 2591 * 2592 * Non-default 0 N.A. REGISTERED 2593 * Non-default 1 N.A. RESERVED 2594 * 2595 * Default 0 N.A. SHARED 2596 * Default 1 1 RESERVED 2597 * Default 1 > 1 SHARED 2598 * Default > 1 N.A. SHARED 2599 * 2600 * For a TX group, the following is the state table. 2601 * 2602 * Group type # of clients Group State 2603 * in the group 2604 * 2605 * Non-default 0 REGISTERED 2606 * Non-default 1 RESERVED 2607 * 2608 * Default 0 REGISTERED 2609 * Default 1 RESERVED 2610 * Default > 1 SHARED 2611 */ 2612 mac_group_state_t 2613 mac_group_next_state(mac_group_t *grp, mac_client_impl_t **group_only_mcip, 2614 mac_group_t *defgrp, boolean_t rx_group) 2615 { 2616 mac_impl_t *mip = (mac_impl_t *)grp->mrg_mh; 2617 2618 *group_only_mcip = NULL; 2619 2620 /* Non-default group */ 2621 2622 if (grp != defgrp) { 2623 if (MAC_GROUP_NO_CLIENT(grp)) 2624 return (MAC_GROUP_STATE_REGISTERED); 2625 2626 *group_only_mcip = MAC_GROUP_ONLY_CLIENT(grp); 2627 if (*group_only_mcip != NULL) 2628 return (MAC_GROUP_STATE_RESERVED); 2629 2630 return (MAC_GROUP_STATE_SHARED); 2631 } 2632 2633 /* Default group */ 2634 2635 if (MAC_GROUP_NO_CLIENT(grp)) { 2636 if (rx_group) 2637 return (MAC_GROUP_STATE_SHARED); 2638 else 2639 return (MAC_GROUP_STATE_REGISTERED); 2640 } 2641 *group_only_mcip = MAC_GROUP_ONLY_CLIENT(grp); 2642 if (*group_only_mcip == NULL) 2643 return (MAC_GROUP_STATE_SHARED); 2644 2645 if (rx_group && mip->mi_nactiveclients != 1) 2646 return (MAC_GROUP_STATE_SHARED); 2647 2648 ASSERT(*group_only_mcip != NULL); 2649 return (MAC_GROUP_STATE_RESERVED); 2650 } 2651 2652 /* 2653 * OVERVIEW NOTES FOR DATAPATH 2654 * =========================== 2655 * 2656 * Create an SRS and setup the corresponding flow function and args. 2657 * Add a classification rule for the flow specified by 'flent' and program 2658 * the hardware classifier when applicable. 2659 * 2660 * Rx ring assignment, SRS, polling and B/W enforcement 2661 * ---------------------------------------------------- 2662 * 2663 * We try to use H/W classification on NIC and assign traffic to a 2664 * MAC address to a particular Rx ring. There is a 1-1 mapping 2665 * between a SRS and a Rx ring. The SRS (short for soft ring set) 2666 * dynamically switches the underlying Rx ring between interrupt 2667 * and polling mode and enforces any specified B/W control. 2668 * 2669 * There is always a SRS created and tied to each H/W and S/W rule. 2670 * Whenever we create a H/W rule, we always add the the same rule to 2671 * S/W classifier and tie a SRS to it. 2672 * 2673 * In case a B/W control is specified, its broken into bytes 2674 * per ticks and as soon as the quota for a tick is exhausted, 2675 * the underlying Rx ring is forced into poll mode for remianing 2676 * tick. The SRS poll thread only polls for bytes that are 2677 * allowed to come in the SRS. We typically let 4x the configured 2678 * B/W worth of packets to come in the SRS (to prevent unnecessary 2679 * drops due to bursts) but only process the specified amount. 2680 * 2681 * A Link (primary NIC, VNIC, VLAN or aggr) can have 1 or more 2682 * Rx rings (and corresponding SRSs) assigned to it. The SRS 2683 * in turn can have softrings to do protocol level fanout or 2684 * softrings to do S/W based fanout or both. In case the NIC 2685 * has no Rx rings, we do S/W classification to respective SRS. 2686 * The S/W classification rule is always setup and ready. This 2687 * allows the MAC layer to reassign Rx rings whenever needed 2688 * but packets still continue to flow via the default path and 2689 * getting S/W classified to correct SRS. 2690 * 2691 * In other cases where a NIC or VNIC is plumbed, our goal is use 2692 * H/W classifier and get two Rx ring assigned for the Link. One 2693 * for TCP and one for UDP|SCTP. The respective SRS still do the 2694 * polling on the Rx ring. For Link that is plumbed for IP, there 2695 * is a TCP squeue which also does polling and can control the 2696 * the Rx ring directly (where SRS is just pass through). For 2697 * the following cases, the SRS does the polling underneath. 2698 * 1) non IP based Links (Links which are not plumbed via ifconfig) 2699 * and paths which have no IP squeues (UDP & SCTP) 2700 * 2) If B/W control is specified on the Link 2701 * 3) If S/W fanout is secified 2702 * 2703 * Note1: As of current implementation, we try to assign only 1 Rx 2704 * ring per Link and more than 1 Rx ring for primary Link for 2705 * H/W based fanout. We always create following softrings per SRS: 2706 * 1) TCP softring which is polled by TCP squeue where possible 2707 * (and also bypasses DLS) 2708 * 2) UDP/SCTP based which bypasses DLS 2709 * 3) OTH softring which goes via DLS (currently deal with IPv6 2710 * and non TCP/UDP/SCTP for IPv4 packets). 2711 * 2712 * It is necessary to create 3 softrings since SRS has to poll 2713 * the single Rx ring underneath and enforce any link level B/W 2714 * control (we can't switch the Rx ring in poll mode just based 2715 * on TCP squeue if the same Rx ring is sharing UDP and other 2716 * traffic as well). Once polling is done and any Link level B/W 2717 * control is specified, the packets are assigned to respective 2718 * softring based on protocol. Since TCP has IP based squeue 2719 * which benefits by polling, we separate TCP packets into 2720 * its own softring which can be polled by IP squeue. We need 2721 * to separate out UDP/SCTP to UDP softring since it can bypass 2722 * the DLS layer which has heavy performance advanatges and we 2723 * need a softring (OTH) for rest. 2724 * 2725 * ToDo: The 3 softrings for protocol are needed only till we can 2726 * get rid of DLS from datapath, make IPv4 and IPv6 paths 2727 * symmetric (deal with mac_header_info for v6 and polling for 2728 * IPv4 TCP - ip_accept_tcp is IPv4 specific although squeues 2729 * are generic), and bring SAP based classification to MAC layer 2730 * 2731 * H/W and S/W based fanout and multiple Rx rings per Link 2732 * ------------------------------------------------------- 2733 * 2734 * In case, fanout is requested (or determined automatically based 2735 * on Link speed and processor speed), we try to assign multiple 2736 * Rx rings per Link with their respective SRS. In this case 2737 * the NIC should be capable of fanning out incoming packets between 2738 * the assigned Rx rings (H/W based fanout). All the SRS 2739 * individually switch their Rx ring between interrupt and polling 2740 * mode but share a common B/W control counter in case of Link 2741 * level B/W is specified. 2742 * 2743 * If S/W based fanout is specified in lieu of H/W based fanout, 2744 * the Link SRS creates the specified number of softrings for 2745 * each protocol (TCP, UDP, OTH). Incoming packets are fanned 2746 * out to the correct softring based on their protocol and 2747 * protocol specific hash function. 2748 * 2749 * Primary and non primary MAC clients 2750 * ----------------------------------- 2751 * 2752 * The NICs, VNICs, Vlans, and Aggrs are typically termed as Links 2753 * and are a Layer 2 construct. 2754 * 2755 * Primary NIC: 2756 * The Link that owns the primary MAC address and typically 2757 * is used as the data NIC in non virtualized cases. As such 2758 * H/W resources are preferntially given to primary NIC. As 2759 * far as code is concerned, there is no difference in the 2760 * primary NIC vs VNICs. They are all treated as Links. 2761 * At the very first call to mac_unicast_add() we program the S/W 2762 * classifier for the primary MAC address, get a soft ring set 2763 * (and soft rings based on 'ip_soft_ring_cnt') 2764 * and a Rx ring assigned for polling to get enabled. 2765 * When IP get plumbed and negotiates polling, we can 2766 * let squeue do the polling on TCP softring. 2767 * 2768 * VNICs: 2769 * Same as any other Link. As long as the H/W resource assignments 2770 * are equal, the data path and setup for all Links is same. 2771 * 2772 * Flows: 2773 * Can be configured on Links. They have their own SRS and the 2774 * S/W classifier is programmed appropriately based on the flow. 2775 * The flows typically deal with layer 3 and above and 2776 * creates a soft ring set specific to the flow. The receive 2777 * side function is switched from mac_rx_srs_process to 2778 * mac_rx_srs_subflow_process which first tries to assign the 2779 * packet to appropriate flow SRS and failing which assigns it 2780 * to link SRS. This allows us to avoid the layered approach 2781 * which gets complex. 2782 * 2783 * By the time mac_datapath_setup() completes, we already have the 2784 * soft rings set, Rx rings, soft rings, etc figured out and both H/W 2785 * and S/W classifiers programmed. IP is not plumbed yet (and might 2786 * never be for Virtual Machines guest OS path). When IP is plumbed 2787 * (for both NIC and VNIC), we do a capability negotiation for polling 2788 * and upcall functions etc. 2789 * 2790 * Rx ring Assignement NOTES 2791 * ------------------------- 2792 * 2793 * For NICs which have only 1 Rx ring (we treat NICs with no Rx rings 2794 * as NIC with a single default ring), we assign the only ring to 2795 * primary Link. The primary Link SRS can do polling on it as long as 2796 * it is the only link in use and we compare the MAC address for unicast 2797 * packets before accepting an incoming packet (there is no need for S/W 2798 * classification in this case). We disable polling on the only ring the 2799 * moment 2nd link gets created (the polling remains enabled even though 2800 * there are broadcast and * multicast flows created). 2801 * 2802 * If the NIC has more than 1 Rx ring, we assign the default ring (the 2803 * 1st ring) to deal with broadcast, multicast and traffic for other 2804 * NICs which needs S/W classification. We assign the primary mac 2805 * addresses to another ring by specifiying a classification rule for 2806 * primary unicast MAC address to the selected ring. The primary Link 2807 * (and its SRS) can continue to poll the assigned Rx ring at all times 2808 * independantly. 2809 * 2810 * Note: In future, if no fanout is specified, we try to assign 2 Rx 2811 * rings for the primary Link with the primary MAC address + TCP going 2812 * to one ring and primary MAC address + UDP|SCTP going to other ring. 2813 * Any remaining traffic for primary MAC address can go to the default 2814 * Rx ring and get S/W classified. This way the respective SRSs don't 2815 * need to do proto fanout and don't need to have softrings at all and 2816 * can poll their respective Rx rings. 2817 * 2818 * As an optimization, when a new NIC or VNIC is created, we can get 2819 * only one Rx ring and make it a TCP specific Rx ring and use the 2820 * H/W default Rx ring for the rest (this Rx ring is never polled). 2821 * 2822 * For clients that don't have MAC address, but want to receive and 2823 * transmit packets (e.g, bpf, gvrp etc.), we need to setup the datapath. 2824 * For such clients (identified by the MCIS_NO_UNICAST_ADDR flag) we 2825 * always give the default group and use software classification (i.e. 2826 * even if this is the only client in the default group, we will 2827 * leave group as shared). 2828 */ 2829 int 2830 mac_datapath_setup(mac_client_impl_t *mcip, flow_entry_t *flent, 2831 uint32_t link_type) 2832 { 2833 mac_impl_t *mip = mcip->mci_mip; 2834 mac_group_t *rgroup = NULL; 2835 mac_group_t *tgroup = NULL; 2836 mac_group_t *default_rgroup; 2837 mac_group_t *default_tgroup; 2838 int err; 2839 uint8_t *mac_addr; 2840 mac_group_state_t next_state; 2841 mac_client_impl_t *group_only_mcip; 2842 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 2843 mac_resource_props_t *emrp = MCIP_EFFECTIVE_PROPS(mcip); 2844 boolean_t rxhw; 2845 boolean_t txhw; 2846 boolean_t use_default = B_FALSE; 2847 cpupart_t *cpupart; 2848 boolean_t no_unicast; 2849 boolean_t isprimary = flent->fe_type & FLOW_PRIMARY_MAC; 2850 mac_client_impl_t *reloc_pmcip = NULL; 2851 2852 ASSERT(MAC_PERIM_HELD((mac_handle_t)mip)); 2853 2854 switch (link_type) { 2855 case SRST_FLOW: 2856 mac_srs_group_setup(mcip, flent, link_type); 2857 return (0); 2858 2859 case SRST_LINK: 2860 no_unicast = mcip->mci_state_flags & MCIS_NO_UNICAST_ADDR; 2861 mac_addr = flent->fe_flow_desc.fd_dst_mac; 2862 2863 /* Default RX group */ 2864 default_rgroup = MAC_DEFAULT_RX_GROUP(mip); 2865 2866 /* Default TX group */ 2867 default_tgroup = MAC_DEFAULT_TX_GROUP(mip); 2868 2869 if (no_unicast) { 2870 rgroup = default_rgroup; 2871 tgroup = default_tgroup; 2872 goto grp_found; 2873 } 2874 rxhw = (mrp->mrp_mask & MRP_RX_RINGS) && 2875 (mrp->mrp_nrxrings > 0 || 2876 (mrp->mrp_mask & MRP_RXRINGS_UNSPEC)); 2877 txhw = (mrp->mrp_mask & MRP_TX_RINGS) && 2878 (mrp->mrp_ntxrings > 0 || 2879 (mrp->mrp_mask & MRP_TXRINGS_UNSPEC)); 2880 2881 /* 2882 * By default we have given the primary all the rings 2883 * i.e. the default group. Let's see if the primary 2884 * needs to be relocated so that the addition of this 2885 * client doesn't impact the primary's performance, 2886 * i.e. if the primary is in the default group and 2887 * we add this client, the primary will lose polling. 2888 * We do this only for NICs supporting dynamic ring 2889 * grouping and only when this is the first client 2890 * after the primary (i.e. nactiveclients is 2) 2891 */ 2892 if (!isprimary && mip->mi_nactiveclients == 2 && 2893 (group_only_mcip = mac_primary_client_handle(mip)) != 2894 NULL && mip->mi_rx_group_type == MAC_GROUP_TYPE_DYNAMIC) { 2895 reloc_pmcip = mac_check_primary_relocation( 2896 group_only_mcip, rxhw); 2897 } 2898 /* 2899 * Check to see if we can get an exclusive group for 2900 * this mac address or if there already exists a 2901 * group that has this mac address (case of VLANs). 2902 * If no groups are available, use the default group. 2903 */ 2904 rgroup = mac_reserve_rx_group(mcip, mac_addr, B_FALSE); 2905 if (rgroup == NULL && rxhw) { 2906 err = ENOSPC; 2907 goto setup_failed; 2908 } else if (rgroup == NULL) { 2909 rgroup = default_rgroup; 2910 } 2911 /* 2912 * Check to see if we can get an exclusive group for 2913 * this mac client. If no groups are available, use 2914 * the default group. 2915 */ 2916 tgroup = mac_reserve_tx_group(mcip, B_FALSE); 2917 if (tgroup == NULL && txhw) { 2918 if (rgroup != NULL && rgroup != default_rgroup) 2919 mac_release_rx_group(mcip, rgroup); 2920 err = ENOSPC; 2921 goto setup_failed; 2922 } else if (tgroup == NULL) { 2923 tgroup = default_tgroup; 2924 } 2925 2926 /* 2927 * Some NICs don't support any Rx rings, so there may not 2928 * even be a default group. 2929 */ 2930 grp_found: 2931 if (rgroup != NULL) { 2932 if (rgroup != default_rgroup && 2933 MAC_GROUP_NO_CLIENT(rgroup) && 2934 (rxhw || mcip->mci_share != 0)) { 2935 MAC_RX_GRP_RESERVED(mip); 2936 if (mip->mi_rx_group_type == 2937 MAC_GROUP_TYPE_DYNAMIC) { 2938 MAC_RX_RING_RESERVED(mip, 2939 rgroup->mrg_cur_count); 2940 } 2941 } 2942 flent->fe_rx_ring_group = rgroup; 2943 /* 2944 * Add the client to the group. This could cause 2945 * either this group to move to the shared state or 2946 * cause the default group to move to the shared state. 2947 * The actions on this group are done here, while the 2948 * actions on the default group are postponed to 2949 * the end of this function. 2950 */ 2951 mac_group_add_client(rgroup, mcip); 2952 next_state = mac_group_next_state(rgroup, 2953 &group_only_mcip, default_rgroup, B_TRUE); 2954 mac_set_group_state(rgroup, next_state); 2955 } 2956 2957 if (tgroup != NULL) { 2958 if (tgroup != default_tgroup && 2959 MAC_GROUP_NO_CLIENT(tgroup) && 2960 (txhw || mcip->mci_share != 0)) { 2961 MAC_TX_GRP_RESERVED(mip); 2962 if (mip->mi_tx_group_type == 2963 MAC_GROUP_TYPE_DYNAMIC) { 2964 MAC_TX_RING_RESERVED(mip, 2965 tgroup->mrg_cur_count); 2966 } 2967 } 2968 flent->fe_tx_ring_group = tgroup; 2969 mac_group_add_client(tgroup, mcip); 2970 next_state = mac_group_next_state(tgroup, 2971 &group_only_mcip, default_tgroup, B_FALSE); 2972 tgroup->mrg_state = next_state; 2973 } 2974 /* 2975 * Setup the Rx and Tx SRSes. If we got a pristine group 2976 * exclusively above, mac_srs_group_setup would simply create 2977 * the required SRSes. If we ended up sharing a previously 2978 * reserved group, mac_srs_group_setup would also dismantle the 2979 * SRSes of the previously exclusive group 2980 */ 2981 mac_srs_group_setup(mcip, flent, link_type); 2982 2983 /* We are setting up minimal datapath only */ 2984 if (no_unicast) 2985 break; 2986 /* Program the S/W Classifer */ 2987 if ((err = mac_flow_add(mip->mi_flow_tab, flent)) != 0) 2988 goto setup_failed; 2989 2990 /* Program the H/W Classifier */ 2991 if ((err = mac_add_macaddr(mip, rgroup, mac_addr, 2992 (mcip->mci_state_flags & MCIS_UNICAST_HW) != 0)) != 0) 2993 goto setup_failed; 2994 mcip->mci_unicast = mac_find_macaddr(mip, mac_addr); 2995 ASSERT(mcip->mci_unicast != NULL); 2996 /* (Re)init the v6 token & local addr used by link protection */ 2997 mac_protect_update_mac_token(mcip); 2998 break; 2999 3000 default: 3001 ASSERT(B_FALSE); 3002 break; 3003 } 3004 3005 /* 3006 * All broadcast and multicast traffic is received only on the default 3007 * group. If we have setup the datapath for a non-default group above 3008 * then move the default group to shared state to allow distribution of 3009 * incoming broadcast traffic to the other groups and dismantle the 3010 * SRSes over the default group. 3011 */ 3012 if (rgroup != NULL) { 3013 if (rgroup != default_rgroup) { 3014 if (default_rgroup->mrg_state == 3015 MAC_GROUP_STATE_RESERVED) { 3016 group_only_mcip = MAC_GROUP_ONLY_CLIENT( 3017 default_rgroup); 3018 ASSERT(group_only_mcip != NULL && 3019 mip->mi_nactiveclients > 1); 3020 3021 mac_set_group_state(default_rgroup, 3022 MAC_GROUP_STATE_SHARED); 3023 mac_rx_srs_group_setup(group_only_mcip, 3024 group_only_mcip->mci_flent, SRST_LINK); 3025 pool_lock(); 3026 cpupart = mac_pset_find(mrp, &use_default); 3027 mac_fanout_setup(group_only_mcip, 3028 group_only_mcip->mci_flent, 3029 MCIP_RESOURCE_PROPS(group_only_mcip), 3030 mac_rx_deliver, group_only_mcip, NULL, 3031 cpupart); 3032 mac_set_pool_effective(use_default, cpupart, 3033 mrp, emrp); 3034 pool_unlock(); 3035 } 3036 ASSERT(default_rgroup->mrg_state == 3037 MAC_GROUP_STATE_SHARED); 3038 } 3039 /* 3040 * If we get an exclusive group for a VLAN MAC client we 3041 * need to take the s/w path to make the additional check for 3042 * the vid. Disable polling and set it to s/w classification. 3043 * Similarly for clients that don't have a unicast address. 3044 */ 3045 if (rgroup->mrg_state == MAC_GROUP_STATE_RESERVED && 3046 (i_mac_flow_vid(flent) != VLAN_ID_NONE || no_unicast)) { 3047 mac_rx_switch_grp_to_sw(rgroup); 3048 } 3049 } 3050 mac_set_rings_effective(mcip); 3051 return (0); 3052 3053 setup_failed: 3054 /* Switch the primary back to default group */ 3055 if (reloc_pmcip != NULL) { 3056 (void) mac_rx_switch_group(reloc_pmcip, 3057 reloc_pmcip->mci_flent->fe_rx_ring_group, default_rgroup); 3058 } 3059 mac_datapath_teardown(mcip, flent, link_type); 3060 return (err); 3061 } 3062 3063 void 3064 mac_datapath_teardown(mac_client_impl_t *mcip, flow_entry_t *flent, 3065 uint32_t link_type) 3066 { 3067 mac_impl_t *mip = mcip->mci_mip; 3068 mac_group_t *group = NULL; 3069 mac_client_impl_t *grp_only_mcip; 3070 flow_entry_t *group_only_flent; 3071 mac_group_t *default_group; 3072 boolean_t check_default_group = B_FALSE; 3073 mac_group_state_t next_state; 3074 mac_resource_props_t *mrp = MCIP_RESOURCE_PROPS(mcip); 3075 3076 ASSERT(MAC_PERIM_HELD((mac_handle_t)mip)); 3077 3078 switch (link_type) { 3079 case SRST_FLOW: 3080 mac_rx_srs_group_teardown(flent, B_FALSE); 3081 mac_tx_srs_group_teardown(mcip, flent, SRST_FLOW); 3082 return; 3083 3084 case SRST_LINK: 3085 /* Stop sending packets */ 3086 mac_tx_client_block(mcip); 3087 3088 /* Stop the packets coming from the H/W */ 3089 if (mcip->mci_unicast != NULL) { 3090 int err; 3091 err = mac_remove_macaddr(mcip->mci_unicast); 3092 if (err != 0) { 3093 cmn_err(CE_WARN, "%s: failed to remove a MAC" 3094 " address because of error 0x%x", 3095 mip->mi_name, err); 3096 } 3097 mcip->mci_unicast = NULL; 3098 } 3099 3100 /* Stop the packets coming from the S/W classifier */ 3101 mac_flow_remove(mip->mi_flow_tab, flent, B_FALSE); 3102 mac_flow_wait(flent, FLOW_DRIVER_UPCALL); 3103 3104 /* Now quiesce and destroy all SRS and soft rings */ 3105 mac_rx_srs_group_teardown(flent, B_FALSE); 3106 mac_tx_srs_group_teardown(mcip, flent, SRST_LINK); 3107 3108 ASSERT((mcip->mci_flent == flent) && 3109 (flent->fe_next == NULL)); 3110 3111 /* 3112 * Release our hold on the group as well. We need 3113 * to check if the shared group has only one client 3114 * left who can use it exclusively. Also, if we 3115 * were the last client, release the group. 3116 */ 3117 group = flent->fe_rx_ring_group; 3118 default_group = MAC_DEFAULT_RX_GROUP(mip); 3119 if (group != NULL) { 3120 mac_group_remove_client(group, mcip); 3121 next_state = mac_group_next_state(group, 3122 &grp_only_mcip, default_group, B_TRUE); 3123 if (next_state == MAC_GROUP_STATE_RESERVED) { 3124 /* 3125 * Only one client left on this RX group. 3126 */ 3127 ASSERT(grp_only_mcip != NULL); 3128 mac_set_group_state(group, 3129 MAC_GROUP_STATE_RESERVED); 3130 group_only_flent = grp_only_mcip->mci_flent; 3131 3132 /* 3133 * The only remaining client has exclusive 3134 * access on the group. Allow it to 3135 * dynamically poll the H/W rings etc. 3136 */ 3137 mac_rx_srs_group_setup(grp_only_mcip, 3138 group_only_flent, SRST_LINK); 3139 mac_fanout_setup(grp_only_mcip, 3140 group_only_flent, 3141 MCIP_RESOURCE_PROPS(grp_only_mcip), 3142 mac_rx_deliver, grp_only_mcip, NULL, NULL); 3143 mac_rx_group_unmark(group, MR_INCIPIENT); 3144 mac_set_rings_effective(grp_only_mcip); 3145 } else if (next_state == MAC_GROUP_STATE_REGISTERED) { 3146 /* 3147 * This is a non-default group being freed up. 3148 * We need to reevaluate the default group 3149 * to see if the primary client can get 3150 * exclusive access to the default group. 3151 */ 3152 ASSERT(group != MAC_DEFAULT_RX_GROUP(mip)); 3153 if (mrp->mrp_mask & MRP_RX_RINGS) { 3154 MAC_RX_GRP_RELEASED(mip); 3155 if (mip->mi_rx_group_type == 3156 MAC_GROUP_TYPE_DYNAMIC) { 3157 MAC_RX_RING_RELEASED(mip, 3158 group->mrg_cur_count); 3159 } 3160 } 3161 mac_release_rx_group(mcip, group); 3162 mac_set_group_state(group, 3163 MAC_GROUP_STATE_REGISTERED); 3164 check_default_group = B_TRUE; 3165 } else { 3166 ASSERT(next_state == MAC_GROUP_STATE_SHARED); 3167 mac_set_group_state(group, 3168 MAC_GROUP_STATE_SHARED); 3169 mac_rx_group_unmark(group, MR_CONDEMNED); 3170 } 3171 flent->fe_rx_ring_group = NULL; 3172 } 3173 /* 3174 * Remove the client from the TX group. Additionally, if 3175 * this a non-default group, then we also need to release 3176 * the group. 3177 */ 3178 group = flent->fe_tx_ring_group; 3179 default_group = MAC_DEFAULT_TX_GROUP(mip); 3180 if (group != NULL) { 3181 mac_group_remove_client(group, mcip); 3182 next_state = mac_group_next_state(group, 3183 &grp_only_mcip, default_group, B_FALSE); 3184 if (next_state == MAC_GROUP_STATE_REGISTERED) { 3185 if (group != default_group) { 3186 if (mrp->mrp_mask & MRP_TX_RINGS) { 3187 MAC_TX_GRP_RELEASED(mip); 3188 if (mip->mi_tx_group_type == 3189 MAC_GROUP_TYPE_DYNAMIC) { 3190 MAC_TX_RING_RELEASED( 3191 mip, group-> 3192 mrg_cur_count); 3193 } 3194 } 3195 mac_release_tx_group(mcip, group); 3196 /* 3197 * If the default group is reserved, 3198 * then we need to set the effective 3199 * rings as we would have given 3200 * back some rings when the group 3201 * was released 3202 */ 3203 if (mip->mi_tx_group_type == 3204 MAC_GROUP_TYPE_DYNAMIC && 3205 default_group->mrg_state == 3206 MAC_GROUP_STATE_RESERVED) { 3207 grp_only_mcip = 3208 MAC_GROUP_ONLY_CLIENT 3209 (default_group); 3210 mac_set_rings_effective( 3211 grp_only_mcip); 3212 } 3213 } else { 3214 mac_ring_t *ring; 3215 int cnt; 3216 int ringcnt; 3217 3218 /* 3219 * Stop all the rings except the 3220 * default ring. 3221 */ 3222 ringcnt = group->mrg_cur_count; 3223 ring = group->mrg_rings; 3224 for (cnt = 0; cnt < ringcnt; cnt++) { 3225 if (ring->mr_state == 3226 MR_INUSE && ring != 3227 (mac_ring_t *) 3228 mip->mi_default_tx_ring) { 3229 mac_stop_ring(ring); 3230 ring->mr_flag = 0; 3231 } 3232 ring = ring->mr_next; 3233 } 3234 } 3235 } else if (next_state == MAC_GROUP_STATE_RESERVED) { 3236 mac_set_rings_effective(grp_only_mcip); 3237 } 3238 flent->fe_tx_ring_group = NULL; 3239 group->mrg_state = next_state; 3240 } 3241 break; 3242 default: 3243 ASSERT(B_FALSE); 3244 break; 3245 } 3246 3247 /* 3248 * The mac client using the default group gets exclusive access to the 3249 * default group if and only if it is the sole client on the entire 3250 * mip. If so set the group state to reserved, and set up the SRSes 3251 * over the default group. 3252 */ 3253 if (check_default_group) { 3254 default_group = MAC_DEFAULT_RX_GROUP(mip); 3255 ASSERT(default_group->mrg_state == MAC_GROUP_STATE_SHARED); 3256 next_state = mac_group_next_state(default_group, 3257 &grp_only_mcip, default_group, B_TRUE); 3258 if (next_state == MAC_GROUP_STATE_RESERVED) { 3259 ASSERT(grp_only_mcip != NULL && 3260 mip->mi_nactiveclients == 1); 3261 mac_set_group_state(default_group, 3262 MAC_GROUP_STATE_RESERVED); 3263 mac_rx_srs_group_setup(grp_only_mcip, 3264 grp_only_mcip->mci_flent, SRST_LINK); 3265 mac_fanout_setup(grp_only_mcip, 3266 grp_only_mcip->mci_flent, 3267 MCIP_RESOURCE_PROPS(grp_only_mcip), mac_rx_deliver, 3268 grp_only_mcip, NULL, NULL); 3269 mac_rx_group_unmark(default_group, MR_INCIPIENT); 3270 mac_set_rings_effective(grp_only_mcip); 3271 } 3272 } 3273 3274 /* 3275 * If the primary is the only one left and the MAC supports 3276 * dynamic grouping, we need to see if the primary needs to 3277 * be moved to the default group so that it can use all the 3278 * H/W rings. 3279 */ 3280 if (!(flent->fe_type & FLOW_PRIMARY_MAC) && 3281 mip->mi_nactiveclients == 1 && 3282 mip->mi_rx_group_type == MAC_GROUP_TYPE_DYNAMIC) { 3283 default_group = MAC_DEFAULT_RX_GROUP(mip); 3284 grp_only_mcip = mac_primary_client_handle(mip); 3285 if (grp_only_mcip == NULL) 3286 return; 3287 group_only_flent = grp_only_mcip->mci_flent; 3288 mrp = MCIP_RESOURCE_PROPS(grp_only_mcip); 3289 /* 3290 * If the primary has an explicit property set, leave it 3291 * alone. 3292 */ 3293 if (mrp->mrp_mask & MRP_RX_RINGS) 3294 return; 3295 /* 3296 * Switch the primary to the default group. 3297 */ 3298 (void) mac_rx_switch_group(grp_only_mcip, 3299 group_only_flent->fe_rx_ring_group, default_group); 3300 } 3301 } 3302 3303 /* DATAPATH TEAR DOWN ROUTINES (SRS and FANOUT teardown) */ 3304 3305 static void 3306 mac_srs_fanout_list_free(mac_soft_ring_set_t *mac_srs) 3307 { 3308 if (mac_srs->srs_type & SRST_TX) { 3309 mac_srs_tx_t *tx; 3310 3311 ASSERT(mac_srs->srs_tcp_soft_rings == NULL); 3312 ASSERT(mac_srs->srs_udp_soft_rings == NULL); 3313 ASSERT(mac_srs->srs_oth_soft_rings == NULL); 3314 ASSERT(mac_srs->srs_tx_soft_rings != NULL); 3315 kmem_free(mac_srs->srs_tx_soft_rings, 3316 sizeof (mac_soft_ring_t *) * MAX_RINGS_PER_GROUP); 3317 mac_srs->srs_tx_soft_rings = NULL; 3318 tx = &mac_srs->srs_tx; 3319 if (tx->st_soft_rings != NULL) { 3320 kmem_free(tx->st_soft_rings, 3321 sizeof (mac_soft_ring_t *) * MAX_RINGS_PER_GROUP); 3322 } 3323 } else { 3324 ASSERT(mac_srs->srs_tx_soft_rings == NULL); 3325 ASSERT(mac_srs->srs_tcp_soft_rings != NULL); 3326 kmem_free(mac_srs->srs_tcp_soft_rings, 3327 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3328 mac_srs->srs_tcp_soft_rings = NULL; 3329 ASSERT(mac_srs->srs_udp_soft_rings != NULL); 3330 kmem_free(mac_srs->srs_udp_soft_rings, 3331 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3332 mac_srs->srs_udp_soft_rings = NULL; 3333 ASSERT(mac_srs->srs_oth_soft_rings != NULL); 3334 kmem_free(mac_srs->srs_oth_soft_rings, 3335 sizeof (mac_soft_ring_t *) * MAX_SR_FANOUT); 3336 mac_srs->srs_oth_soft_rings = NULL; 3337 } 3338 } 3339 3340 /* 3341 * An RX SRS is attached to at most one mac_ring. 3342 * A TX SRS has no rings. 3343 */ 3344 static void 3345 mac_srs_ring_free(mac_soft_ring_set_t *mac_srs) 3346 { 3347 mac_client_impl_t *mcip; 3348 mac_ring_t *ring; 3349 flow_entry_t *flent; 3350 3351 ring = mac_srs->srs_ring; 3352 if (mac_srs->srs_type & SRST_TX) { 3353 ASSERT(ring == NULL); 3354 return; 3355 } 3356 3357 if (ring == NULL) 3358 return; 3359 3360 /* 3361 * Broadcast flows don't have a client impl association, but they 3362 * use only soft rings. 3363 */ 3364 flent = mac_srs->srs_flent; 3365 mcip = flent->fe_mcip; 3366 ASSERT(mcip != NULL); 3367 3368 ring->mr_classify_type = MAC_NO_CLASSIFIER; 3369 ring->mr_srs = NULL; 3370 } 3371 3372 /* 3373 * Physical unlink and free of the data structures happen below. This is 3374 * driven from mac_flow_destroy(), on the last refrele of a flow. 3375 * 3376 * Assumes Rx srs is 1-1 mapped with an ring. 3377 */ 3378 void 3379 mac_srs_free(mac_soft_ring_set_t *mac_srs) 3380 { 3381 ASSERT(mac_srs->srs_mcip == NULL || 3382 MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 3383 ASSERT((mac_srs->srs_state & (SRS_CONDEMNED | SRS_CONDEMNED_DONE | 3384 SRS_PROC | SRS_PROC_FAST)) == (SRS_CONDEMNED | SRS_CONDEMNED_DONE)); 3385 3386 mac_pkt_drop(NULL, NULL, mac_srs->srs_first, B_FALSE); 3387 mac_srs_ring_free(mac_srs); 3388 mac_srs_soft_rings_free(mac_srs); 3389 mac_srs_fanout_list_free(mac_srs); 3390 3391 mac_srs->srs_bw = NULL; 3392 mac_srs_stat_delete(mac_srs); 3393 kmem_cache_free(mac_srs_cache, mac_srs); 3394 } 3395 3396 static void 3397 mac_srs_soft_rings_quiesce(mac_soft_ring_set_t *mac_srs, uint_t s_ring_flag) 3398 { 3399 mac_soft_ring_t *softring; 3400 3401 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3402 3403 mac_srs_soft_rings_signal(mac_srs, s_ring_flag); 3404 if (s_ring_flag == S_RING_CONDEMNED) { 3405 while (mac_srs->srs_soft_ring_condemned_count != 3406 mac_srs->srs_soft_ring_count) 3407 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3408 } else { 3409 while (mac_srs->srs_soft_ring_quiesced_count != 3410 mac_srs->srs_soft_ring_count) 3411 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3412 } 3413 mutex_exit(&mac_srs->srs_lock); 3414 3415 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3416 softring = softring->s_ring_next) { 3417 (void) untimeout(softring->s_ring_tid); 3418 softring->s_ring_tid = NULL; 3419 } 3420 3421 (void) untimeout(mac_srs->srs_tid); 3422 mac_srs->srs_tid = NULL; 3423 3424 mutex_enter(&mac_srs->srs_lock); 3425 } 3426 3427 /* 3428 * The block comment above mac_rx_classify_flow_state_change explains the 3429 * background. At this point upcalls from the driver (both hardware classified 3430 * and software classified) have been cut off. We now need to quiesce the 3431 * SRS worker, poll, and softring threads. The SRS worker thread serves as 3432 * the master controller. The steps involved are described below in the function 3433 */ 3434 void 3435 mac_srs_worker_quiesce(mac_soft_ring_set_t *mac_srs) 3436 { 3437 uint_t s_ring_flag; 3438 uint_t srs_poll_wait_flag; 3439 3440 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3441 ASSERT(mac_srs->srs_state & (SRS_CONDEMNED | SRS_QUIESCE)); 3442 3443 if (mac_srs->srs_state & SRS_CONDEMNED) { 3444 s_ring_flag = S_RING_CONDEMNED; 3445 srs_poll_wait_flag = SRS_POLL_THR_EXITED; 3446 } else { 3447 s_ring_flag = S_RING_QUIESCE; 3448 srs_poll_wait_flag = SRS_POLL_THR_QUIESCED; 3449 } 3450 3451 /* 3452 * In the case of Rx SRS wait till the poll thread is done. 3453 */ 3454 if ((mac_srs->srs_type & SRST_TX) == 0 && 3455 mac_srs->srs_poll_thr != NULL) { 3456 while (!(mac_srs->srs_state & srs_poll_wait_flag)) 3457 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3458 3459 /* 3460 * Turn off polling as part of the quiesce operation. 3461 */ 3462 MAC_SRS_POLLING_OFF(mac_srs); 3463 mac_srs->srs_state &= ~(SRS_POLLING | SRS_GET_PKTS); 3464 } 3465 3466 /* 3467 * Then signal the soft ring worker threads to quiesce or quit 3468 * as needed and then wait till that happens. 3469 */ 3470 mac_srs_soft_rings_quiesce(mac_srs, s_ring_flag); 3471 3472 if (mac_srs->srs_state & SRS_CONDEMNED) 3473 mac_srs->srs_state |= (SRS_QUIESCE_DONE | SRS_CONDEMNED_DONE); 3474 else 3475 mac_srs->srs_state |= SRS_QUIESCE_DONE; 3476 cv_signal(&mac_srs->srs_quiesce_done_cv); 3477 } 3478 3479 /* 3480 * Signal an SRS to start a temporary quiesce, or permanent removal, or restart 3481 * a quiesced SRS by setting the appropriate flags and signaling the SRS worker 3482 * or poll thread. This function is internal to the quiescing logic and is 3483 * called internally from the SRS quiesce or flow quiesce or client quiesce 3484 * higher level functions. 3485 */ 3486 void 3487 mac_srs_signal(mac_soft_ring_set_t *mac_srs, uint_t srs_flag) 3488 { 3489 mac_ring_t *ring; 3490 3491 ring = mac_srs->srs_ring; 3492 ASSERT(ring == NULL || ring->mr_refcnt == 0); 3493 3494 if (srs_flag == SRS_CONDEMNED) { 3495 /* 3496 * The SRS is going away. We need to unbind the SRS and SR 3497 * threads before removing from the global SRS list. Otherwise 3498 * there is a small window where the cpu reconfig callbacks 3499 * may miss the SRS in the list walk and DR could fail since 3500 * there are still bound threads. 3501 */ 3502 mac_srs_threads_unbind(mac_srs); 3503 mac_srs_remove_glist(mac_srs); 3504 } 3505 /* 3506 * Wakeup the SRS worker and poll threads. 3507 */ 3508 mutex_enter(&mac_srs->srs_lock); 3509 mac_srs->srs_state |= srs_flag; 3510 cv_signal(&mac_srs->srs_async); 3511 cv_signal(&mac_srs->srs_cv); 3512 mutex_exit(&mac_srs->srs_lock); 3513 } 3514 3515 /* 3516 * In the Rx side, the quiescing is done bottom up. After the Rx upcalls 3517 * from the driver are done, then the Rx SRS is quiesced and only then can 3518 * we signal the soft rings. Thus this function can't be called arbitrarily 3519 * without satisfying the prerequisites. On the Tx side, the threads from 3520 * top need to quiesced, then the Tx SRS and only then can we signal the 3521 * Tx soft rings. 3522 */ 3523 static void 3524 mac_srs_soft_rings_signal(mac_soft_ring_set_t *mac_srs, uint_t sr_flag) 3525 { 3526 mac_soft_ring_t *softring; 3527 3528 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3529 softring = softring->s_ring_next) 3530 mac_soft_ring_signal(softring, sr_flag); 3531 } 3532 3533 /* 3534 * The block comment above mac_rx_classify_flow_state_change explains the 3535 * background. At this point the SRS is quiesced and we need to restart the 3536 * SRS worker, poll, and softring threads. The SRS worker thread serves as 3537 * the master controller. The steps involved are described below in the function 3538 */ 3539 void 3540 mac_srs_worker_restart(mac_soft_ring_set_t *mac_srs) 3541 { 3542 boolean_t iam_rx_srs; 3543 mac_soft_ring_t *softring; 3544 3545 ASSERT(MUTEX_HELD(&mac_srs->srs_lock)); 3546 if ((mac_srs->srs_type & SRST_TX) != 0) { 3547 iam_rx_srs = B_FALSE; 3548 ASSERT((mac_srs->srs_state & 3549 (SRS_POLL_THR_QUIESCED | SRS_QUIESCE_DONE | SRS_QUIESCE)) == 3550 (SRS_QUIESCE_DONE | SRS_QUIESCE)); 3551 } else { 3552 iam_rx_srs = B_TRUE; 3553 ASSERT((mac_srs->srs_state & 3554 (SRS_QUIESCE_DONE | SRS_QUIESCE)) == 3555 (SRS_QUIESCE_DONE | SRS_QUIESCE)); 3556 if (mac_srs->srs_poll_thr != NULL) { 3557 ASSERT((mac_srs->srs_state & SRS_POLL_THR_QUIESCED) == 3558 SRS_POLL_THR_QUIESCED); 3559 } 3560 } 3561 3562 /* 3563 * Signal any quiesced soft ring workers to restart and wait for the 3564 * soft ring down count to come down to zero. 3565 */ 3566 if (mac_srs->srs_soft_ring_quiesced_count != 0) { 3567 for (softring = mac_srs->srs_soft_ring_head; softring != NULL; 3568 softring = softring->s_ring_next) { 3569 if (!(softring->s_ring_state & S_RING_QUIESCE)) 3570 continue; 3571 mac_soft_ring_signal(softring, S_RING_RESTART); 3572 } 3573 while (mac_srs->srs_soft_ring_quiesced_count != 0) 3574 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3575 } 3576 3577 mac_srs->srs_state &= ~(SRS_QUIESCE_DONE | SRS_QUIESCE | SRS_RESTART); 3578 if (iam_rx_srs && mac_srs->srs_poll_thr != NULL) { 3579 /* 3580 * Signal the poll thread and ask it to restart. Wait till it 3581 * actually restarts and the SRS_POLL_THR_QUIESCED flag gets 3582 * cleared. 3583 */ 3584 mac_srs->srs_state |= SRS_POLL_THR_RESTART; 3585 cv_signal(&mac_srs->srs_cv); 3586 while (mac_srs->srs_state & SRS_POLL_THR_QUIESCED) 3587 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3588 ASSERT(!(mac_srs->srs_state & SRS_POLL_THR_RESTART)); 3589 } 3590 /* Wake up any waiter waiting for the restart to complete */ 3591 mac_srs->srs_state |= SRS_RESTART_DONE; 3592 cv_signal(&mac_srs->srs_quiesce_done_cv); 3593 } 3594 3595 static void 3596 mac_srs_worker_unbind(mac_soft_ring_set_t *mac_srs) 3597 { 3598 mutex_enter(&mac_srs->srs_lock); 3599 if (!(mac_srs->srs_state & SRS_WORKER_BOUND)) { 3600 ASSERT(mac_srs->srs_worker_cpuid == -1); 3601 mutex_exit(&mac_srs->srs_lock); 3602 return; 3603 } 3604 3605 mac_srs->srs_worker_cpuid = -1; 3606 mac_srs->srs_state &= ~SRS_WORKER_BOUND; 3607 thread_affinity_clear(mac_srs->srs_worker); 3608 mutex_exit(&mac_srs->srs_lock); 3609 } 3610 3611 static void 3612 mac_srs_poll_unbind(mac_soft_ring_set_t *mac_srs) 3613 { 3614 mutex_enter(&mac_srs->srs_lock); 3615 if (mac_srs->srs_poll_thr == NULL || 3616 (mac_srs->srs_state & SRS_POLL_BOUND) == 0) { 3617 ASSERT(mac_srs->srs_poll_cpuid == -1); 3618 mutex_exit(&mac_srs->srs_lock); 3619 return; 3620 } 3621 3622 mac_srs->srs_poll_cpuid = -1; 3623 mac_srs->srs_state &= ~SRS_POLL_BOUND; 3624 thread_affinity_clear(mac_srs->srs_poll_thr); 3625 mutex_exit(&mac_srs->srs_lock); 3626 } 3627 3628 static void 3629 mac_srs_threads_unbind(mac_soft_ring_set_t *mac_srs) 3630 { 3631 mac_soft_ring_t *soft_ring; 3632 3633 ASSERT(MAC_PERIM_HELD((mac_handle_t)mac_srs->srs_mcip->mci_mip)); 3634 3635 mutex_enter(&cpu_lock); 3636 mac_srs_worker_unbind(mac_srs); 3637 if (!(mac_srs->srs_type & SRST_TX)) 3638 mac_srs_poll_unbind(mac_srs); 3639 3640 for (soft_ring = mac_srs->srs_soft_ring_head; soft_ring != NULL; 3641 soft_ring = soft_ring->s_ring_next) { 3642 mac_soft_ring_unbind(soft_ring); 3643 } 3644 mutex_exit(&cpu_lock); 3645 } 3646 3647 /* 3648 * When a CPU is going away, unbind all MAC threads which are bound 3649 * to that CPU. The affinity of the thread to the CPU is saved to allow 3650 * the thread to be rebound to the CPU if it comes back online. 3651 */ 3652 static void 3653 mac_walk_srs_and_unbind(int cpuid) 3654 { 3655 mac_soft_ring_set_t *mac_srs; 3656 mac_soft_ring_t *soft_ring; 3657 3658 rw_enter(&mac_srs_g_lock, RW_READER); 3659 3660 if ((mac_srs = mac_srs_g_list) == NULL) 3661 goto done; 3662 3663 for (; mac_srs != NULL; mac_srs = mac_srs->srs_next) { 3664 if (mac_srs->srs_worker_cpuid == cpuid) { 3665 mac_srs->srs_worker_cpuid_save = cpuid; 3666 mac_srs_worker_unbind(mac_srs); 3667 } 3668 3669 if (!(mac_srs->srs_type & SRST_TX)) { 3670 if (mac_srs->srs_poll_cpuid == cpuid) { 3671 mac_srs->srs_poll_cpuid_save = cpuid; 3672 mac_srs_poll_unbind(mac_srs); 3673 } 3674 } 3675 3676 /* Next tackle the soft rings associated with the srs */ 3677 mutex_enter(&mac_srs->srs_lock); 3678 for (soft_ring = mac_srs->srs_soft_ring_head; soft_ring != NULL; 3679 soft_ring = soft_ring->s_ring_next) { 3680 if (soft_ring->s_ring_cpuid == cpuid) { 3681 soft_ring->s_ring_cpuid_save = cpuid; 3682 mac_soft_ring_unbind(soft_ring); 3683 } 3684 } 3685 mutex_exit(&mac_srs->srs_lock); 3686 } 3687 done: 3688 rw_exit(&mac_srs_g_lock); 3689 } 3690 3691 /* TX SETUP and TEARDOWN ROUTINES */ 3692 3693 /* 3694 * XXXHIO need to make sure the two mac_tx_srs_{add,del}_ring() 3695 * handle the case where the number of rings is one. I.e. there is 3696 * a ring pointed to by mac_srs->srs_tx_arg2. 3697 */ 3698 void 3699 mac_tx_srs_add_ring(mac_soft_ring_set_t *mac_srs, mac_ring_t *tx_ring) 3700 { 3701 mac_client_impl_t *mcip = mac_srs->srs_mcip; 3702 mac_soft_ring_t *soft_ring; 3703 int count = mac_srs->srs_tx_ring_count; 3704 uint32_t soft_ring_type = ST_RING_TX; 3705 uint_t ring_info; 3706 3707 ASSERT(mac_srs->srs_state & SRS_QUIESCE); 3708 ring_info = mac_hwring_getinfo((mac_ring_handle_t)tx_ring); 3709 if (mac_tx_serialize || (ring_info & MAC_RING_TX_SERIALIZE)) 3710 soft_ring_type |= ST_RING_WORKER_ONLY; 3711 soft_ring = mac_soft_ring_create(count, 0, 3712 soft_ring_type, maxclsyspri, mcip, mac_srs, -1, 3713 NULL, mcip, (mac_resource_handle_t)tx_ring); 3714 mac_srs->srs_tx_ring_count++; 3715 mac_srs_update_fanout_list(mac_srs); 3716 /* 3717 * put this soft ring in quiesce mode too so when we restart 3718 * all soft rings in the srs are in the same state. 3719 */ 3720 mac_soft_ring_signal(soft_ring, S_RING_QUIESCE); 3721 } 3722 3723 static void 3724 mac_soft_ring_remove(mac_soft_ring_set_t *mac_srs, mac_soft_ring_t *softring) 3725 { 3726 int sringcnt; 3727 3728 mutex_enter(&mac_srs->srs_lock); 3729 sringcnt = mac_srs->srs_soft_ring_count; 3730 ASSERT(sringcnt > 0); 3731 mac_soft_ring_signal(softring, S_RING_CONDEMNED); 3732 3733 ASSERT(mac_srs->srs_soft_ring_condemned_count == 0); 3734 while (mac_srs->srs_soft_ring_condemned_count != 1) 3735 cv_wait(&mac_srs->srs_async, &mac_srs->srs_lock); 3736 3737 if (softring == mac_srs->srs_soft_ring_head) { 3738 mac_srs->srs_soft_ring_head = softring->s_ring_next; 3739 if (mac_srs->srs_soft_ring_head != NULL) { 3740 mac_srs->srs_soft_ring_head->s_ring_prev = NULL; 3741 } else { 3742 mac_srs->srs_soft_ring_tail = NULL; 3743 } 3744 } else { 3745 softring->s_ring_prev->s_ring_next = 3746 softring->s_ring_next; 3747 if (softring->s_ring_next != NULL) { 3748 softring->s_ring_next->s_ring_prev = 3749 softring->s_ring_prev; 3750 } else { 3751 mac_srs->srs_soft_ring_tail = 3752 softring->s_ring_prev; 3753 } 3754 } 3755 mac_srs->srs_soft_ring_count--; 3756 3757 mac_srs->srs_soft_ring_condemned_count--; 3758 mutex_exit(&mac_srs->srs_lock); 3759 3760 mac_soft_ring_free(softring); 3761 } 3762 3763 void 3764 mac_tx_srs_del_ring(mac_soft_ring_set_t *mac_srs, mac_ring_t *tx_ring) 3765 { 3766 int i; 3767 mac_soft_ring_t *soft_ring, *remove_sring; 3768 mac_client_impl_t *mcip = mac_srs->srs_mcip; 3769 3770 mutex_enter(&mac_srs->srs_lock); 3771 for (i = 0; i < mac_srs->srs_tx_ring_count; i++) { 3772 soft_ring = mac_srs->srs_tx_soft_rings[i]; 3773 if (soft_ring->s_ring_tx_arg2 == tx_ring) 3774 break; 3775 } 3776 mutex_exit(&mac_srs->srs_lock); 3777 ASSERT(i < mac_srs->srs_tx_ring_count); 3778 remove_sring = soft_ring; 3779 /* 3780 * In the case of aggr, the soft ring associated with a Tx ring 3781 * is also stored in st_soft_rings[] array. That entry should 3782 * be removed. 3783 */ 3784 if (mcip->mci_state_flags & MCIS_IS_AGGR) { 3785 mac_srs_tx_t *tx = &mac_srs->srs_tx; 3786 3787 ASSERT(tx->st_soft_rings[tx_ring->mr_index] == remove_sring); 3788 tx->st_soft_rings[tx_ring->mr_index] = NULL; 3789 } 3790 mac_soft_ring_remove(mac_srs, remove_sring); 3791 mac_srs_update_fanout_list(mac_srs); 3792 } 3793 3794 /* 3795 * mac_tx_srs_setup(): 3796 * Used to setup Tx rings. If no free Tx ring is available, then default 3797 * Tx ring is used. 3798 */ 3799 void 3800 mac_tx_srs_setup(mac_client_impl_t *mcip, flow_entry_t *flent) 3801 { 3802 mac_impl_t *mip = mcip->mci_mip; 3803 mac_soft_ring_set_t *tx_srs = flent->fe_tx_srs; 3804 int i; 3805 int tx_ring_count = 0; 3806 uint32_t soft_ring_type; 3807 mac_group_t *grp = NULL; 3808 mac_ring_t *ring; 3809 mac_srs_tx_t *tx = &tx_srs->srs_tx; 3810 boolean_t is_aggr; 3811 uint_t ring_info = 0; 3812 3813 is_aggr = (mcip->mci_state_flags & MCIS_IS_AGGR) != 0; 3814 grp = flent->fe_tx_ring_group; 3815 if (grp == NULL) { 3816 ring = (mac_ring_t *)mip->mi_default_tx_ring; 3817 goto no_group; 3818 } 3819 tx_ring_count = grp->mrg_cur_count; 3820 ring = grp->mrg_rings; 3821 /* 3822 * An attempt is made to reserve 'tx_ring_count' number 3823 * of Tx rings. If tx_ring_count is 0, default Tx ring 3824 * is used. If it is 1, an attempt is made to reserve one 3825 * Tx ring. In both the cases, the ring information is 3826 * stored in Tx SRS. If multiple Tx rings are specified, 3827 * then each Tx ring will have a Tx-side soft ring. All 3828 * these soft rings will be hang off Tx SRS. 3829 */ 3830 switch (grp->mrg_state) { 3831 case MAC_GROUP_STATE_SHARED: 3832 case MAC_GROUP_STATE_RESERVED: 3833 if (tx_ring_count <= 1 && !is_aggr) { 3834 no_group: 3835 if (ring != NULL && 3836 ring->mr_state != MR_INUSE) { 3837 (void) mac_start_ring(ring); 3838 ring_info = mac_hwring_getinfo( 3839 (mac_ring_handle_t)ring); 3840 } 3841 tx->st_arg2 = (void *)ring; 3842 mac_tx_srs_stat_recreate(tx_srs, B_FALSE); 3843 if (tx_srs->srs_type & SRST_BW_CONTROL) { 3844 tx->st_mode = SRS_TX_BW; 3845 } else if (mac_tx_serialize || 3846 (ring_info & MAC_RING_TX_SERIALIZE)) { 3847 tx->st_mode = SRS_TX_SERIALIZE; 3848 } else { 3849 tx->st_mode = SRS_TX_DEFAULT; 3850 } 3851 break; 3852 } 3853 soft_ring_type = ST_RING_TX; 3854 if (tx_srs->srs_type & SRST_BW_CONTROL) { 3855 tx->st_mode = is_aggr ? 3856 SRS_TX_BW_AGGR : SRS_TX_BW_FANOUT; 3857 } else { 3858 tx->st_mode = is_aggr ? SRS_TX_AGGR : 3859 SRS_TX_FANOUT; 3860 } 3861 for (i = 0; i < tx_ring_count; i++) { 3862 ASSERT(ring != NULL); 3863 switch (ring->mr_state) { 3864 case MR_INUSE: 3865 case MR_FREE: 3866 ASSERT(ring->mr_srs == NULL); 3867 3868 if (ring->mr_state != MR_INUSE) 3869 (void) mac_start_ring(ring); 3870 ring_info = mac_hwring_getinfo( 3871 (mac_ring_handle_t)ring); 3872 if (mac_tx_serialize || (ring_info & 3873 MAC_RING_TX_SERIALIZE)) { 3874 soft_ring_type |= 3875 ST_RING_WORKER_ONLY; 3876 } 3877 (void) mac_soft_ring_create(i, 0, 3878 soft_ring_type, maxclsyspri, 3879 mcip, tx_srs, -1, NULL, mcip, 3880 (mac_resource_handle_t)ring); 3881 break; 3882 default: 3883 cmn_err(CE_PANIC, 3884 "srs_setup: mcip = %p " 3885 "trying to add UNKNOWN ring = %p\n", 3886 (void *)mcip, (void *)ring); 3887 break; 3888 } 3889 ring = ring->mr_next; 3890 } 3891 mac_srs_update_fanout_list(tx_srs); 3892 break; 3893 default: 3894 ASSERT(B_FALSE); 3895 break; 3896 } 3897 tx->st_func = mac_tx_get_func(tx->st_mode); 3898 if (is_aggr) { 3899 VERIFY(i_mac_capab_get((mac_handle_t)mip, 3900 MAC_CAPAB_AGGR, &tx->st_capab_aggr)); 3901 } 3902 DTRACE_PROBE3(tx__srs___setup__return, mac_soft_ring_set_t *, tx_srs, 3903 int, tx->st_mode, int, tx_srs->srs_tx_ring_count); 3904 } 3905 3906 /* 3907 * Update the fanout of a client if its recorded link speed doesn't match 3908 * its current link speed. 3909 */ 3910 void 3911 mac_fanout_recompute_client(mac_client_impl_t *mcip, cpupart_t *cpupart) 3912 { 3913 uint64_t link_speed; 3914 mac_resource_props_t *mcip_mrp; 3915 flow_entry_t *flent = mcip->mci_flent; 3916 mac_soft_ring_set_t *rx_srs; 3917 mac_cpus_t *srs_cpu; 3918 int soft_ring_count, maxcpus; 3919 3920 ASSERT(MAC_PERIM_HELD((mac_handle_t)mcip->mci_mip)); 3921 3922 link_speed = mac_client_stat_get(mcip->mci_flent->fe_mcip, 3923 MAC_STAT_IFSPEED); 3924 3925 if ((link_speed != 0) && 3926 (link_speed != mcip->mci_flent->fe_nic_speed)) { 3927 mcip_mrp = MCIP_RESOURCE_PROPS(mcip); 3928 /* 3929 * Before calling mac_fanout_setup(), check to see if 3930 * the SRSes already have the right number of soft 3931 * rings. mac_fanout_setup() is a heavy duty operation 3932 * where new cpu bindings are done for SRS and soft 3933 * ring threads and interrupts re-targeted. 3934 */ 3935 maxcpus = (cpupart != NULL) ? cpupart->cp_ncpus : ncpus; 3936 soft_ring_count = mac_compute_soft_ring_count(flent, 3937 flent->fe_rx_srs_cnt - 1, maxcpus); 3938 /* 3939 * If soft_ring_count returned by 3940 * mac_compute_soft_ring_count() is 0, bump it 3941 * up by 1 because we always have atleast one 3942 * TCP, UDP, and OTH soft ring associated with 3943 * an SRS. 3944 */ 3945 soft_ring_count = (soft_ring_count == 0) ? 3946 1 : soft_ring_count; 3947 rx_srs = flent->fe_rx_srs[0]; 3948 srs_cpu = &rx_srs->srs_cpu; 3949 if (soft_ring_count != srs_cpu->mc_rx_fanout_cnt) { 3950 mac_fanout_setup(mcip, flent, mcip_mrp, 3951 mac_rx_deliver, mcip, NULL, cpupart); 3952 } 3953 } 3954 } 3955 3956 /* 3957 * Walk through the list of mac clients for the MAC. 3958 * For each active mac client, recompute the number of soft rings 3959 * associated with every client, only if current speed is different 3960 * from the speed that was previously used for soft ring computation. 3961 * If the cable is disconnected whlie the NIC is started, we would get 3962 * notification with speed set to 0. We do not recompute in that case. 3963 */ 3964 void 3965 mac_fanout_recompute(mac_impl_t *mip) 3966 { 3967 mac_client_impl_t *mcip; 3968 cpupart_t *cpupart; 3969 boolean_t use_default; 3970 mac_resource_props_t *mrp, *emrp; 3971 3972 i_mac_perim_enter(mip); 3973 if ((mip->mi_state_flags & MIS_IS_VNIC) != 0 || 3974 mip->mi_linkstate != LINK_STATE_UP) { 3975 i_mac_perim_exit(mip); 3976 return; 3977 } 3978 3979 for (mcip = mip->mi_clients_list; mcip != NULL; 3980 mcip = mcip->mci_client_next) { 3981 if ((mcip->mci_state_flags & MCIS_SHARE_BOUND) != 0 || 3982 !MCIP_DATAPATH_SETUP(mcip)) 3983 continue; 3984 mrp = MCIP_RESOURCE_PROPS(mcip); 3985 emrp = MCIP_EFFECTIVE_PROPS(mcip); 3986 use_default = B_FALSE; 3987 pool_lock(); 3988 cpupart = mac_pset_find(mrp, &use_default); 3989 mac_fanout_recompute_client(mcip, cpupart); 3990 mac_set_pool_effective(use_default, cpupart, mrp, emrp); 3991 pool_unlock(); 3992 } 3993 i_mac_perim_exit(mip); 3994 } 3995 3996 /* 3997 * Given a MAC, change the polling state for all its MAC clients. 'enable' is 3998 * B_TRUE to enable polling or B_FALSE to disable. Polling is enabled by 3999 * default. 4000 */ 4001 void 4002 mac_poll_state_change(mac_handle_t mh, boolean_t enable) 4003 { 4004 mac_impl_t *mip = (mac_impl_t *)mh; 4005 mac_client_impl_t *mcip; 4006 4007 i_mac_perim_enter(mip); 4008 if (enable) 4009 mip->mi_state_flags &= ~MIS_POLL_DISABLE; 4010 else 4011 mip->mi_state_flags |= MIS_POLL_DISABLE; 4012 for (mcip = mip->mi_clients_list; mcip != NULL; 4013 mcip = mcip->mci_client_next) 4014 mac_client_update_classifier(mcip, B_TRUE); 4015 i_mac_perim_exit(mip); 4016 } 4017