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 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * Copyright 2017 Joyent, Inc. 26 */ 27 28 #ifndef _SYS_MAC_SOFT_RING_H 29 #define _SYS_MAC_SOFT_RING_H 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #include <sys/types.h> 36 #include <sys/cpuvar.h> 37 #include <sys/cpupart.h> 38 #include <sys/processor.h> 39 #include <sys/stream.h> 40 #include <sys/squeue.h> 41 #include <sys/dlpi.h> 42 #include <sys/mac_impl.h> 43 #include <sys/mac_stat.h> 44 45 #define S_RING_NAMELEN 64 46 47 #define MAX_SR_FANOUT 24 48 49 extern boolean_t mac_soft_ring_enable; 50 extern boolean_t mac_latency_optimize; 51 52 typedef struct mac_soft_ring_s mac_soft_ring_t; 53 typedef struct mac_soft_ring_set_s mac_soft_ring_set_t; 54 55 typedef void (*mac_soft_ring_drain_func_t)(mac_soft_ring_t *); 56 typedef mac_tx_cookie_t (*mac_tx_func_t)(mac_soft_ring_set_t *, mblk_t *, 57 uintptr_t, uint16_t, mblk_t **); 58 59 60 /* Tx notify callback */ 61 typedef struct mac_tx_notify_cb_s { 62 mac_cb_t mtnf_link; /* Linked list of callbacks */ 63 mac_tx_notify_t mtnf_fn; /* The callback function */ 64 void *mtnf_arg; /* Callback function argument */ 65 } mac_tx_notify_cb_t; 66 67 struct mac_soft_ring_s { 68 /* Keep the most used members 64bytes cache aligned */ 69 kmutex_t s_ring_lock; /* lock before using any member */ 70 uint16_t s_ring_type; /* processing model of the sq */ 71 uint16_t s_ring_state; /* state flags and message count */ 72 int s_ring_count; /* # of mblocks in mac_soft_ring */ 73 size_t s_ring_size; /* Size of data queued */ 74 mblk_t *s_ring_first; /* first mblk chain or NULL */ 75 mblk_t *s_ring_last; /* last mblk chain or NULL */ 76 77 mac_direct_rx_t s_ring_rx_func; 78 void *s_ring_rx_arg1; 79 mac_resource_handle_t s_ring_rx_arg2; 80 81 /* 82 * Threshold after which packets get dropped. 83 * Is always greater than s_ring_tx_hiwat 84 */ 85 int s_ring_tx_max_q_cnt; 86 /* # of mblocks after which to apply flow control */ 87 int s_ring_tx_hiwat; 88 /* # of mblocks after which to relieve flow control */ 89 int s_ring_tx_lowat; 90 boolean_t s_ring_tx_woken_up; 91 uint32_t s_ring_hiwat_cnt; /* times blocked for Tx descs */ 92 93 void *s_ring_tx_arg1; 94 void *s_ring_tx_arg2; 95 96 /* Tx notify callback */ 97 mac_cb_info_t s_ring_notify_cb_info; /* cb list info */ 98 mac_cb_t *s_ring_notify_cb_list; /* The cb list */ 99 100 clock_t s_ring_awaken; /* time async thread was awakened */ 101 102 kthread_t *s_ring_run; /* Current thread processing sq */ 103 processorid_t s_ring_cpuid; /* processor to bind to */ 104 processorid_t s_ring_cpuid_save; /* saved cpuid during offline */ 105 kcondvar_t s_ring_async; /* async thread blocks on */ 106 clock_t s_ring_wait; /* lbolts to wait after a fill() */ 107 timeout_id_t s_ring_tid; /* timer id of pending timeout() */ 108 kthread_t *s_ring_worker; /* kernel thread id */ 109 char s_ring_name[S_RING_NAMELEN + 1]; 110 uint32_t s_ring_total_inpkt; 111 uint32_t s_ring_total_rbytes; 112 uint32_t s_ring_drops; 113 struct mac_client_impl_s *s_ring_mcip; 114 kstat_t *s_ring_ksp; 115 116 /* Teardown, poll disable control ops */ 117 kcondvar_t s_ring_client_cv; /* Client wait for control op */ 118 119 mac_soft_ring_set_t *s_ring_set; /* The SRS this ring belongs to */ 120 mac_soft_ring_t *s_ring_next; 121 mac_soft_ring_t *s_ring_prev; 122 mac_soft_ring_drain_func_t s_ring_drain_func; 123 124 mac_tx_stats_t s_st_stat; 125 }; 126 127 typedef void (*mac_srs_drain_proc_t)(mac_soft_ring_set_t *, uint_t); 128 129 /* Transmit side Soft Ring Set */ 130 typedef struct mac_srs_tx_s { 131 /* Members for Tx size processing */ 132 uint32_t st_mode; 133 mac_tx_func_t st_func; 134 void *st_arg1; 135 void *st_arg2; 136 mac_group_t *st_group; /* TX group for share */ 137 boolean_t st_woken_up; 138 139 /* 140 * st_max_q_cnt is the queue depth threshold to limit 141 * outstanding packets on the Tx SRS. Once the limit 142 * is reached, Tx SRS will drop packets until the 143 * limit goes below the threshold. 144 */ 145 uint32_t st_max_q_cnt; /* max. outstanding packets */ 146 /* 147 * st_hiwat is used Tx serializer and bandwidth mode. 148 * This is the queue depth threshold upto which 149 * packets will get buffered with no flow-control 150 * back pressure applied to the caller. Once this 151 * threshold is reached, back pressure will be 152 * applied to the caller of mac_tx() (mac_tx() starts 153 * returning a cookie to indicate a blocked SRS). 154 * st_hiwat should always be lesser than or equal to 155 * st_max_q_cnt. 156 */ 157 uint32_t st_hiwat; /* mblk cnt to apply flow control */ 158 uint32_t st_lowat; /* mblk cnt to relieve flow control */ 159 uint32_t st_hiwat_cnt; /* times blocked for Tx descs */ 160 mac_tx_stats_t st_stat; 161 mac_capab_aggr_t st_capab_aggr; 162 /* 163 * st_soft_rings is used as an array to store aggr Tx soft 164 * rings. When aggr_find_tx_ring() returns a pseudo ring, 165 * the associated soft ring has to be found. st_soft_rings 166 * array stores the soft ring associated with a pseudo Tx 167 * ring and it can be accessed using the pseudo ring 168 * index (mr_index). Note that the ring index is unique 169 * for each ring in a group. 170 */ 171 mac_soft_ring_t **st_soft_rings; 172 } mac_srs_tx_t; 173 174 /* Receive side Soft Ring Set */ 175 typedef struct mac_srs_rx_s { 176 /* 177 * Upcall Function for fanout, Rx processing etc. Perhaps 178 * the same 3 members below can be used for Tx 179 * processing, but looking around, mac_rx_func_t has 180 * proliferated too much into various files at different 181 * places. I am leaving the consolidation battle for 182 * another day. 183 */ 184 mac_direct_rx_t sr_func; /* srs_lock */ 185 void *sr_arg1; /* srs_lock */ 186 mac_resource_handle_t sr_arg2; /* srs_lock */ 187 mac_rx_func_t sr_lower_proc; /* Atomically changed */ 188 uint32_t sr_poll_pkt_cnt; 189 uint32_t sr_poll_thres; 190 191 /* mblk cnt to apply flow control */ 192 uint32_t sr_hiwat; 193 /* mblk cnt to relieve flow control */ 194 uint32_t sr_lowat; 195 mac_rx_stats_t sr_stat; 196 197 /* Times polling was enabled */ 198 uint32_t sr_poll_on; 199 /* Times polling was enabled by worker thread */ 200 uint32_t sr_worker_poll_on; 201 /* Times polling was disabled */ 202 uint32_t sr_poll_off; 203 /* Poll thread signalled count */ 204 uint32_t sr_poll_thr_sig; 205 /* Poll thread busy */ 206 uint32_t sr_poll_thr_busy; 207 /* SRS drains, stays in poll mode but doesn't poll */ 208 uint32_t sr_poll_drain_no_poll; 209 /* 210 * SRS has nothing to do and no packets in H/W but 211 * there is a backlog in softrings. SRS stays in 212 * poll mode but doesn't do polling. 213 */ 214 uint32_t sr_poll_no_poll; 215 /* Active polling restarted */ 216 uint32_t sr_below_hiwat; 217 /* Found packets in last poll so try and poll again */ 218 uint32_t sr_poll_again; 219 /* 220 * Packets in queue but poll thread not allowed to process so 221 * signal the worker thread. 222 */ 223 uint32_t sr_poll_sig_worker; 224 /* 225 * Poll thread has nothing to do and H/W has nothing so 226 * reenable the interrupts. 227 */ 228 uint32_t sr_poll_intr_enable; 229 /* 230 * Poll thread has nothing to do and worker thread was already 231 * running so it can decide to reenable interrupt or poll again. 232 */ 233 uint32_t sr_poll_goto_sleep; 234 /* Worker thread goes back to draining the queue */ 235 uint32_t sr_drain_again; 236 /* More Packets in queue so signal the poll thread to drain */ 237 uint32_t sr_drain_poll_sig; 238 /* More Packets in queue so signal the worker thread to drain */ 239 uint32_t sr_drain_worker_sig; 240 /* Poll thread is already running so worker has nothing to do */ 241 uint32_t sr_drain_poll_running; 242 /* We have packets already queued so keep polling */ 243 uint32_t sr_drain_keep_polling; 244 /* Drain is done and interrupts are reenabled */ 245 uint32_t sr_drain_finish_intr; 246 /* Polling thread needs to schedule worker wakeup */ 247 uint32_t sr_poll_worker_wakeup; 248 } mac_srs_rx_t; 249 250 /* 251 * mac_soft_ring_set_s: 252 * This is used both for Tx and Rx side. The srs_type identifies Rx or 253 * Tx type. 254 * 255 * Note that the structure is carefully crafted, with Rx elements coming 256 * first followed by Tx specific members. Future additions to this 257 * structure should follow the same guidelines. 258 * 259 * Rx-side notes: 260 * mac_rx_classify_flow_add() always creates a mac_soft_ring_set_t and fn_flow 261 * points to info from it (func = srs_lower_proc, arg = soft_ring_set). On 262 * interrupt path, srs_lower_proc does B/W adjustment and switch to polling mode 263 * (if poll capable) and feeds the packets to soft_ring_list via choosen 264 * fanout type (specified by srs_type). In poll mode, the poll thread which is 265 * also a pointer can pick up the packets and feed them to various 266 * soft_ring_list. 267 * 268 * The srs_type can either be protocol based or fanout based where fanout itelf 269 * can be various types 270 * 271 * The polling works by turning off interrupts as soon as a packets 272 * are queued on the soft ring set. Once the backlog is clear and poll 273 * thread return empty handed i.e. Rx ring doesn't have anything, the 274 * interrupt is turned back on. For this purpose we keep a separate 275 * srs_poll_pkt_cnt counter which tracks the packets queued between SRS 276 * and the soft rings as well. The counter is incremented when packets 277 * are queued and decremented when SRS processes them (in case it has 278 * no soft rings) or the soft ring process them. Its important that 279 * in case SRS has softrings, the decrement doesn't happen till the 280 * packet is processed by the soft rings since it takes very little time 281 * for SRS to queue packet from SRS to soft rings and it will keep 282 * bringing more packets in the system faster than soft rings can 283 * process them. 284 * 285 * Tx side notes: 286 * The srs structure acts as a serializer with a worker thread. The 287 * default behavior of srs though is to act as a pass-thru. The queues 288 * (srs_first, srs_last, srs_count) get used when Tx ring runs out of Tx 289 * descriptors or to enforce bandwidth limits. 290 * 291 * When multiple Tx rings are present, the SRS state will be set to 292 * SRS_FANOUT_OTH. Outgoing packets coming into mac_tx_srs_process() 293 * function will be fanned out to one of the Tx side soft rings based on 294 * a hint passed in mac_tx_srs_process(). Each soft ring, in turn, will 295 * be associated with a distinct h/w Tx ring. 296 */ 297 298 struct mac_soft_ring_set_s { 299 /* 300 * Common elements, common to both Rx and Tx SRS type. 301 * The following block of fields are protected by srs_lock 302 */ 303 kmutex_t srs_lock; 304 uint32_t srs_type; 305 uint32_t srs_state; /* state flags */ 306 uint32_t srs_count; 307 mblk_t *srs_first; /* first mblk chain or NULL */ 308 mblk_t *srs_last; /* last mblk chain or NULL */ 309 kcondvar_t srs_async; /* cv for worker thread */ 310 kcondvar_t srs_cv; /* cv for poll thread */ 311 kcondvar_t srs_quiesce_done_cv; /* cv for removal */ 312 timeout_id_t srs_tid; /* timeout id for pending timeout */ 313 314 /* 315 * List of soft rings & processing function. 316 * The following block is protected by Rx quiescence. 317 * i.e. they can be changed only after quiescing the SRS 318 * Protected by srs_lock. 319 */ 320 mac_soft_ring_t *srs_soft_ring_head; 321 mac_soft_ring_t *srs_soft_ring_tail; 322 int srs_soft_ring_count; 323 int srs_soft_ring_quiesced_count; 324 int srs_soft_ring_condemned_count; 325 mac_soft_ring_t **srs_tcp_soft_rings; 326 int srs_tcp_ring_count; 327 mac_soft_ring_t **srs_udp_soft_rings; 328 int srs_udp_ring_count; 329 mac_soft_ring_t **srs_oth_soft_rings; 330 int srs_oth_ring_count; 331 /* 332 * srs_tx_soft_rings is used by tx_srs in 333 * when operating in multi tx ring mode. 334 */ 335 mac_soft_ring_t **srs_tx_soft_rings; 336 int srs_tx_ring_count; 337 338 /* 339 * Bandwidth control related members. 340 * They are common to both Rx- and Tx-side. 341 * Following protected by srs_lock 342 */ 343 mac_bw_ctl_t *srs_bw; 344 size_t srs_size; /* Size of packets queued in bytes */ 345 pri_t srs_pri; 346 347 mac_soft_ring_set_t *srs_next; /* mac_srs_g_lock */ 348 mac_soft_ring_set_t *srs_prev; /* mac_srs_g_lock */ 349 350 /* Attribute specific drain func (BW ctl vs non-BW ctl) */ 351 mac_srs_drain_proc_t srs_drain_func; /* Write once (WO) */ 352 353 /* 354 * If the associated ring is exclusively used by a mac client, e.g., 355 * an aggregation, this fields is used to keep a reference to the 356 * MAC client's pseudo ring. 357 */ 358 mac_resource_handle_t srs_mrh; 359 /* 360 * The following blocks are write once (WO) and valid for the life 361 * of the SRS 362 */ 363 struct mac_client_impl_s *srs_mcip; /* back ptr to mac client */ 364 void *srs_flent; /* back ptr to flent */ 365 mac_ring_t *srs_ring; /* Ring Descriptor */ 366 367 /* Teardown, disable control ops */ 368 kcondvar_t srs_client_cv; /* Client wait for the control op */ 369 370 kthread_t *srs_worker; /* WO, worker thread */ 371 kthread_t *srs_poll_thr; /* WO, poll thread */ 372 373 uint_t srs_ind; /* Round Robin indx for picking up SR */ 374 processorid_t srs_worker_cpuid; /* processor to bind to */ 375 processorid_t srs_worker_cpuid_save; /* saved cpuid during offline */ 376 processorid_t srs_poll_cpuid; /* processor to bind to */ 377 processorid_t srs_poll_cpuid_save; /* saved cpuid during offline */ 378 uint_t srs_fanout_state; 379 mac_cpus_t srs_cpu; 380 381 mac_srs_rx_t srs_rx; 382 mac_srs_tx_t srs_tx; 383 kstat_t *srs_ksp; 384 }; 385 386 /* 387 * type flags - combination allowed to process and drain the queue 388 */ 389 #define ST_RING_WORKER_ONLY 0x0001 /* Worker thread only */ 390 #define ST_RING_ANY 0x0002 /* Any thread can process the queue */ 391 #define ST_RING_TCP 0x0004 392 #define ST_RING_UDP 0x0008 393 #define ST_RING_OTH 0x0010 394 395 #define ST_RING_BW_CTL 0x0020 396 #define ST_RING_TX 0x0040 397 398 /* 399 * State flags. 400 */ 401 #define S_RING_PROC 0x0001 /* being processed */ 402 #define S_RING_BOUND 0x0002 /* Worker thread is bound to a cpu */ 403 #define S_RING_BLOCK 0x0004 /* No Tx descs */ 404 #define S_RING_TX_HIWAT 0x0008 /* Tx high watermark reached */ 405 406 #define S_RING_WAKEUP_CLIENT 0x0010 /* flow ctrl, client wakeup needed */ 407 #define S_RING_BLANK 0x0020 /* Has been put into polling mode */ 408 #define S_RING_CLIENT_WAIT 0x0040 /* Client waiting for control op */ 409 410 #define S_RING_CONDEMNED 0x0100 /* Being torn down */ 411 #define S_RING_CONDEMNED_DONE 0x0200 /* Being torn down */ 412 #define S_RING_QUIESCE 0x0400 /* No traffic flow, transient flag */ 413 #define S_RING_QUIESCE_DONE 0x0800 /* No traffic flow, transient flag */ 414 415 #define S_RING_RESTART 0x1000 /* Go back to normal traffic flow */ 416 #define S_RING_ENQUEUED 0x2000 /* Pkts enqueued in Tx soft ring */ 417 418 /* 419 * arguments for processors to bind to 420 */ 421 #define S_RING_BIND_NONE -1 422 423 /* 424 * defines for srs_type - identifies a link or a sub-flow 425 * and other static characteristics of a SRS like a tx 426 * srs, tcp only srs, etc. 427 */ 428 #define SRST_LINK 0x00000001 429 #define SRST_FLOW 0x00000002 430 #define SRST_NO_SOFT_RINGS 0x00000004 431 #define SRST_TCP_ONLY 0x00000008 432 433 #define SRST_FANOUT_PROTO 0x00000010 434 #define SRST_FANOUT_SRC_IP 0x00000020 435 #define SRST_FANOUT_OTH 0x00000040 436 #define SRST_DEFAULT_GRP 0x00000080 437 438 #define SRST_TX 0x00000100 439 #define SRST_BW_CONTROL 0x00000200 440 #define SRST_DIRECT_POLL 0x00000400 441 442 #define SRST_DLS_BYPASS 0x00001000 443 #define SRST_CLIENT_POLL_ENABLED 0x00002000 444 445 /* 446 * soft ring set flags. These bits are dynamic in nature and get 447 * applied to srs_state. They reflect the state of SRS at any 448 * point of time 449 */ 450 #define SRS_BLANK 0x00000001 451 #define SRS_WORKER_BOUND 0x00000002 452 #define SRS_POLL_BOUND 0x00000004 453 #define SRS_POLLING_CAPAB 0x00000008 454 455 #define SRS_PROC 0x00000010 456 #define SRS_GET_PKTS 0x00000020 457 #define SRS_POLLING 0x00000040 458 #define SRS_BW_ENFORCED 0x00000080 459 460 #define SRS_WORKER 0x00000100 461 #define SRS_ENQUEUED 0x00000200 462 #define SRS_ANY_PROCESS 0x00000400 463 #define SRS_PROC_FAST 0x00000800 464 465 #define SRS_POLL_PROC 0x00001000 466 #define SRS_TX_BLOCKED 0x00002000 /* out of Tx descs */ 467 #define SRS_TX_HIWAT 0x00004000 /* Tx count exceeds hiwat */ 468 #define SRS_TX_WAKEUP_CLIENT 0x00008000 /* Flow-ctl: wakeup client */ 469 470 #define SRS_CLIENT_PROC 0x00010000 471 #define SRS_CLIENT_WAIT 0x00020000 472 #define SRS_QUIESCE 0x00040000 473 #define SRS_QUIESCE_DONE 0x00080000 474 475 #define SRS_CONDEMNED 0x00100000 476 #define SRS_CONDEMNED_DONE 0x00200000 477 #define SRS_POLL_THR_QUIESCED 0x00400000 478 #define SRS_RESTART 0x00800000 479 480 #define SRS_RESTART_DONE 0x01000000 481 #define SRS_POLL_THR_RESTART 0x02000000 482 #define SRS_IN_GLIST 0x04000000 483 #define SRS_POLL_THR_EXITED 0x08000000 484 485 #define SRS_QUIESCE_PERM 0x10000000 486 #define SRS_LATENCY_OPT 0x20000000 487 #define SRS_SOFTRING_QUEUE 0x40000000 488 489 #define SRS_QUIESCED(srs) (srs->srs_state & SRS_QUIESCE_DONE) 490 491 /* 492 * If the SRS_QUIESCE_PERM flag is set, the SRS worker thread will not be 493 * able to be restarted. 494 */ 495 #define SRS_QUIESCED_PERMANENT(srs) (srs->srs_state & SRS_QUIESCE_PERM) 496 497 /* 498 * soft ring set (SRS) Tx modes 499 */ 500 typedef enum { 501 SRS_TX_DEFAULT = 0, 502 SRS_TX_SERIALIZE, 503 SRS_TX_FANOUT, 504 SRS_TX_BW, 505 SRS_TX_BW_FANOUT, 506 SRS_TX_AGGR, 507 SRS_TX_BW_AGGR 508 } mac_tx_srs_mode_t; 509 510 /* 511 * SRS fanout states 512 */ 513 typedef enum { 514 SRS_FANOUT_UNINIT = 0, 515 SRS_FANOUT_INIT, 516 SRS_FANOUT_REINIT 517 } mac_srs_fanout_state_t; 518 519 /* 520 * Structure for dls statistics 521 */ 522 struct dls_kstats { 523 kstat_named_t dlss_soft_ring_pkt_drop; 524 }; 525 526 extern struct dls_kstats dls_kstat; 527 528 #define DLS_BUMP_STAT(x, y) (dls_kstat.x.value.ui32 += y) 529 530 /* Turn dynamic polling off */ 531 #define MAC_SRS_POLLING_OFF(mac_srs) { \ 532 ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock)); \ 533 if (((mac_srs)->srs_state & (SRS_POLLING_CAPAB|SRS_POLLING)) == \ 534 (SRS_POLLING_CAPAB|SRS_POLLING)) { \ 535 (mac_srs)->srs_state &= ~SRS_POLLING; \ 536 (void) mac_hwring_enable_intr((mac_ring_handle_t) \ 537 (mac_srs)->srs_ring); \ 538 (mac_srs)->srs_rx.sr_poll_off++; \ 539 } \ 540 } 541 542 #define MAC_COUNT_CHAIN(mac_srs, head, tail, cnt, sz) { \ 543 mblk_t *tmp; \ 544 boolean_t bw_ctl = B_FALSE; \ 545 \ 546 ASSERT((head) != NULL); \ 547 cnt = 0; \ 548 sz = 0; \ 549 if ((mac_srs)->srs_type & SRST_BW_CONTROL) \ 550 bw_ctl = B_TRUE; \ 551 tmp = tail = (head); \ 552 if ((head)->b_next == NULL) { \ 553 cnt = 1; \ 554 if (bw_ctl) \ 555 sz += msgdsize(head); \ 556 } else { \ 557 while (tmp != NULL) { \ 558 tail = tmp; \ 559 cnt++; \ 560 if (bw_ctl) \ 561 sz += msgdsize(tmp); \ 562 tmp = tmp->b_next; \ 563 } \ 564 } \ 565 } 566 567 /* 568 * Decrement the cumulative packet count in SRS and its 569 * soft rings. If the srs_poll_pkt_cnt goes below lowat, then check 570 * if if the interface was left in a polling mode and no one 571 * is really processing the queue (to get the interface out 572 * of poll mode). If no one is processing the queue, then 573 * acquire the PROC and signal the poll thread to check the 574 * interface for packets and get the interface back to interrupt 575 * mode if nothing is found. 576 */ 577 #define MAC_UPDATE_SRS_COUNT_LOCKED(mac_srs, cnt) { \ 578 mac_srs_rx_t *srs_rx = &(mac_srs)->srs_rx; \ 579 ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock)); \ 580 \ 581 srs_rx->sr_poll_pkt_cnt -= cnt; \ 582 if ((srs_rx->sr_poll_pkt_cnt <= srs_rx->sr_poll_thres) && \ 583 (((mac_srs)->srs_state & \ 584 (SRS_POLLING|SRS_PROC|SRS_GET_PKTS)) == SRS_POLLING)) \ 585 { \ 586 (mac_srs)->srs_state |= (SRS_PROC|SRS_GET_PKTS); \ 587 cv_signal(&(mac_srs)->srs_cv); \ 588 srs_rx->sr_below_hiwat++; \ 589 } \ 590 } 591 592 /* 593 * The following two macros are used to update the inbound packet and byte. 594 * count. The packet and byte count reflect the packets and bytes that are 595 * taken out of the SRS's queue, i.e. indicating they are being delivered. 596 * The srs_count and srs_size are updated in different locations as the 597 * srs_size is also used to take into account any bandwidth limits. The 598 * srs_size is updated only when a soft ring, if any, sends a packet up, 599 * as opposed to updating it when the SRS sends a packet to the SR, i.e. 600 * the srs_size reflects the packets in the SRS and SRs. These 601 * macros decrement the srs_size and srs_count and also increment the 602 * ipackets and ibytes stats resp. 603 * 604 * xxx-venu These are done under srs_lock, for now we still update 605 * mci_stat_ibytes/mci_stat_ipackets atomically, need to check if 606 * just updating them would be accurate enough. 607 * 608 * If we are updating these for a sub-flow SRS, then we need to also 609 * updated it's MAC client bandwidth info, if the MAC client is also 610 * bandwidth regulated. 611 */ 612 #define MAC_UPDATE_SRS_SIZE_LOCKED(srs, sz) { \ 613 if ((srs)->srs_type & SRST_BW_CONTROL) { \ 614 mutex_enter(&(srs)->srs_bw->mac_bw_lock); \ 615 (srs)->srs_bw->mac_bw_sz -= (sz); \ 616 (srs)->srs_bw->mac_bw_used += (sz); \ 617 mutex_exit(&(srs)->srs_bw->mac_bw_lock); \ 618 } \ 619 } 620 621 #define MAC_TX_UPDATE_BW_INFO(srs, sz) { \ 622 (srs)->srs_bw->mac_bw_sz -= (sz); \ 623 (srs)->srs_bw->mac_bw_used += (sz); \ 624 } 625 626 #define MAC_TX_SOFT_RINGS(mac_srs) ((mac_srs)->srs_tx_ring_count >= 1) 627 628 /* Soft ring flags for teardown */ 629 #define SRS_POLL_THR_OWNER (SRS_PROC | SRS_POLLING | SRS_GET_PKTS) 630 #define SRS_PAUSE (SRS_CONDEMNED | SRS_QUIESCE) 631 #define S_RING_PAUSE (S_RING_CONDEMNED | S_RING_QUIESCE) 632 633 /* Soft rings */ 634 extern void mac_soft_ring_init(void); 635 extern void mac_soft_ring_finish(void); 636 extern void mac_fanout_setup(mac_client_impl_t *, flow_entry_t *, 637 mac_resource_props_t *, mac_direct_rx_t, void *, mac_resource_handle_t, 638 cpupart_t *); 639 640 extern void mac_soft_ring_worker_wakeup(mac_soft_ring_t *); 641 extern void mac_soft_ring_blank(void *, time_t, uint_t, int); 642 extern mblk_t *mac_soft_ring_poll(mac_soft_ring_t *, int); 643 extern void mac_soft_ring_destroy(mac_soft_ring_t *); 644 extern void mac_soft_ring_dls_bypass(void *, mac_direct_rx_t, void *); 645 646 /* Rx SRS */ 647 extern mac_soft_ring_set_t *mac_srs_create(struct mac_client_impl_s *, 648 flow_entry_t *, uint32_t, mac_direct_rx_t, void *, mac_resource_handle_t, 649 mac_ring_t *); 650 extern void mac_srs_free(mac_soft_ring_set_t *); 651 extern void mac_srs_signal(mac_soft_ring_set_t *, uint_t); 652 extern cpu_t *mac_srs_bind(mac_soft_ring_set_t *, processorid_t); 653 extern void mac_rx_srs_retarget_intr(mac_soft_ring_set_t *, processorid_t); 654 extern void mac_tx_srs_retarget_intr(mac_soft_ring_set_t *); 655 656 extern void mac_srs_quiesce_initiate(mac_soft_ring_set_t *); 657 extern void mac_srs_client_poll_enable(struct mac_client_impl_s *, 658 mac_soft_ring_set_t *); 659 extern void mac_srs_client_poll_disable(struct mac_client_impl_s *, 660 mac_soft_ring_set_t *); 661 extern void mac_srs_client_poll_quiesce(struct mac_client_impl_s *, 662 mac_soft_ring_set_t *); 663 extern void mac_srs_client_poll_restart(struct mac_client_impl_s *, 664 mac_soft_ring_set_t *); 665 extern void mac_rx_srs_quiesce(mac_soft_ring_set_t *, uint_t); 666 extern void mac_rx_srs_restart(mac_soft_ring_set_t *); 667 extern void mac_rx_srs_subflow_process(void *, mac_resource_handle_t, mblk_t *, 668 boolean_t); 669 extern void mac_tx_srs_quiesce(mac_soft_ring_set_t *, uint_t); 670 671 /* Tx SRS, Tx softring */ 672 extern void mac_tx_srs_wakeup(mac_soft_ring_set_t *, mac_ring_handle_t); 673 extern void mac_tx_srs_setup(struct mac_client_impl_s *, flow_entry_t *); 674 extern mac_tx_func_t mac_tx_get_func(uint32_t); 675 extern mblk_t *mac_tx_send(mac_client_handle_t, mac_ring_handle_t, mblk_t *, 676 mac_tx_stats_t *); 677 extern boolean_t mac_tx_srs_ring_present(mac_soft_ring_set_t *, mac_ring_t *); 678 extern mac_soft_ring_t *mac_tx_srs_get_soft_ring(mac_soft_ring_set_t *, 679 mac_ring_t *); 680 extern void mac_tx_srs_add_ring(mac_soft_ring_set_t *, mac_ring_t *); 681 extern void mac_tx_srs_del_ring(mac_soft_ring_set_t *, mac_ring_t *); 682 extern mac_tx_cookie_t mac_tx_srs_no_desc(mac_soft_ring_set_t *, mblk_t *, 683 uint16_t, mblk_t **); 684 685 /* Subflow specific stuff */ 686 extern int mac_srs_flow_create(struct mac_client_impl_s *, flow_entry_t *, 687 mac_resource_props_t *, int, int, mac_direct_rx_t); 688 extern void mac_srs_update_bwlimit(flow_entry_t *, mac_resource_props_t *); 689 extern void mac_srs_adjust_subflow_bwlimit(struct mac_client_impl_s *); 690 extern void mac_srs_update_drv(struct mac_client_impl_s *); 691 extern void mac_update_srs_priority(mac_soft_ring_set_t *, pri_t); 692 extern void mac_client_update_classifier(mac_client_impl_t *, boolean_t); 693 694 extern void mac_soft_ring_intr_enable(void *); 695 extern boolean_t mac_soft_ring_intr_disable(void *); 696 extern mac_soft_ring_t *mac_soft_ring_create(int, clock_t, uint16_t, 697 pri_t, mac_client_impl_t *, mac_soft_ring_set_t *, 698 processorid_t, mac_direct_rx_t, void *, mac_resource_handle_t); 699 extern cpu_t *mac_soft_ring_bind(mac_soft_ring_t *, processorid_t); 700 extern void mac_soft_ring_unbind(mac_soft_ring_t *); 701 extern void mac_soft_ring_free(mac_soft_ring_t *); 702 extern void mac_soft_ring_signal(mac_soft_ring_t *, uint_t); 703 extern void mac_rx_soft_ring_process(mac_client_impl_t *, mac_soft_ring_t *, 704 mblk_t *, mblk_t *, int, size_t); 705 extern mac_tx_cookie_t mac_tx_soft_ring_process(mac_soft_ring_t *, 706 mblk_t *, uint16_t, mblk_t **); 707 extern void mac_srs_worker_quiesce(mac_soft_ring_set_t *); 708 extern void mac_srs_worker_restart(mac_soft_ring_set_t *); 709 extern void mac_rx_attach_flow_srs(mac_impl_t *, flow_entry_t *, 710 mac_soft_ring_set_t *, mac_ring_t *, mac_classify_type_t); 711 712 extern void mac_rx_srs_drain_bw(mac_soft_ring_set_t *, uint_t); 713 extern void mac_rx_srs_drain(mac_soft_ring_set_t *, uint_t); 714 extern void mac_rx_srs_process(void *, mac_resource_handle_t, mblk_t *, 715 boolean_t); 716 extern void mac_srs_worker(mac_soft_ring_set_t *); 717 extern void mac_rx_srs_poll_ring(mac_soft_ring_set_t *); 718 extern void mac_tx_srs_drain(mac_soft_ring_set_t *, uint_t); 719 720 extern void mac_tx_srs_restart(mac_soft_ring_set_t *); 721 extern void mac_rx_srs_remove(mac_soft_ring_set_t *); 722 723 #ifdef __cplusplus 724 } 725 #endif 726 727 #endif /* _SYS_MAC_SOFT_RING_H */ 728