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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_MAC_SOFT_RING_H 28 #define _SYS_MAC_SOFT_RING_H 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #include <sys/types.h> 35 #include <sys/cpuvar.h> 36 #include <sys/processor.h> 37 #include <sys/stream.h> 38 #include <sys/squeue.h> 39 #include <sys/dlpi.h> 40 #include <sys/mac_impl.h> 41 42 #define S_RING_NAMELEN 64 43 44 #define MAX_SR_FANOUT 32 45 46 extern boolean_t mac_soft_ring_enable; 47 extern boolean_t mac_latency_optimize; 48 49 typedef struct mac_soft_ring_s mac_soft_ring_t; 50 typedef struct mac_soft_ring_set_s mac_soft_ring_set_t; 51 52 typedef void (*mac_soft_ring_drain_func_t)(mac_soft_ring_t *); 53 typedef mac_tx_cookie_t (*mac_tx_func_t)(mac_soft_ring_set_t *, mblk_t *, 54 uintptr_t, uint16_t, mblk_t **); 55 56 57 /* Tx notify callback */ 58 typedef struct mac_tx_notify_cb_s { 59 mac_cb_t mtnf_link; /* Linked list of callbacks */ 60 mac_tx_notify_t mtnf_fn; /* The callback function */ 61 void *mtnf_arg; /* Callback function argument */ 62 } mac_tx_notify_cb_t; 63 64 struct mac_soft_ring_s { 65 /* Keep the most used members 64bytes cache aligned */ 66 kmutex_t s_ring_lock; /* lock before using any member */ 67 uint16_t s_ring_type; /* processing model of the sq */ 68 uint16_t s_ring_state; /* state flags and message count */ 69 int s_ring_count; /* # of mblocks in mac_soft_ring */ 70 size_t s_ring_size; /* Size of data queued */ 71 mblk_t *s_ring_first; /* first mblk chain or NULL */ 72 mblk_t *s_ring_last; /* last mblk chain or NULL */ 73 74 mac_direct_rx_t s_ring_rx_func; 75 void *s_ring_rx_arg1; 76 mac_resource_handle_t s_ring_rx_arg2; 77 78 /* 79 * Threshold after which packets get dropped. 80 * Is always greater than s_ring_tx_hiwat 81 */ 82 int s_ring_tx_max_q_cnt; 83 /* # of mblocks after which to apply flow control */ 84 int s_ring_tx_hiwat; 85 /* # of mblocks after which to relieve flow control */ 86 int s_ring_tx_lowat; 87 boolean_t s_ring_tx_woken_up; 88 uint32_t s_ring_blocked_cnt; /* times blocked for Tx descs */ 89 uint32_t s_ring_unblocked_cnt; /* unblock calls from driver */ 90 uint32_t s_ring_hiwat_cnt; /* times blocked for Tx descs */ 91 92 void *s_ring_tx_arg1; 93 void *s_ring_tx_arg2; 94 95 /* Tx notify callback */ 96 mac_cb_info_t s_ring_notify_cb_info; /* cb list info */ 97 mac_cb_t *s_ring_notify_cb_list; /* The cb list */ 98 99 clock_t s_ring_awaken; /* time async thread was awakened */ 100 101 kthread_t *s_ring_run; /* Current thread processing sq */ 102 processorid_t s_ring_cpuid; /* processor to bind to */ 103 processorid_t s_ring_cpuid_save; /* saved cpuid during offline */ 104 kcondvar_t s_ring_async; /* async thread blocks on */ 105 clock_t s_ring_wait; /* lbolts to wait after a fill() */ 106 timeout_id_t s_ring_tid; /* timer id of pending timeout() */ 107 kthread_t *s_ring_worker; /* kernel thread id */ 108 char s_ring_name[S_RING_NAMELEN + 1]; 109 uint32_t s_ring_total_inpkt; 110 uint32_t s_ring_drops; 111 struct mac_client_impl_s *s_ring_mcip; 112 void *s_ring_flent; 113 kstat_t *s_ring_ksp; 114 115 /* Teardown, poll disable control ops */ 116 kcondvar_t s_ring_client_cv; /* Client wait for control op */ 117 118 mac_soft_ring_set_t *s_ring_set; /* The SRS this ring belongs to */ 119 mac_soft_ring_t *s_ring_next; 120 mac_soft_ring_t *s_ring_prev; 121 mac_soft_ring_drain_func_t s_ring_drain_func; 122 }; 123 124 typedef void (*mac_srs_drain_proc_t)(mac_soft_ring_set_t *, uint_t); 125 126 /* Transmit side Soft Ring Set */ 127 typedef struct mac_srs_tx_s { 128 /* Members for Tx size processing */ 129 uint32_t st_mode; 130 mac_tx_func_t st_func; 131 void *st_arg1; 132 void *st_arg2; 133 mac_group_t *st_group; /* TX group for share */ 134 boolean_t st_woken_up; 135 136 /* 137 * st_max_q_cnt is the queue depth threshold to limit 138 * outstanding packets on the Tx SRS. Once the limit 139 * is reached, Tx SRS will drop packets until the 140 * limit goes below the threshold. 141 */ 142 uint32_t st_max_q_cnt; /* max. outstanding packets */ 143 /* 144 * st_hiwat is used Tx serializer and bandwidth mode. 145 * This is the queue depth threshold upto which 146 * packets will get buffered with no flow-control 147 * back pressure applied to the caller. Once this 148 * threshold is reached, back pressure will be 149 * applied to the caller of mac_tx() (mac_tx() starts 150 * returning a cookie to indicate a blocked SRS). 151 * st_hiwat should always be lesser than or equal to 152 * st_max_q_cnt. 153 */ 154 uint32_t st_hiwat; /* mblk cnt to apply flow control */ 155 uint32_t st_lowat; /* mblk cnt to relieve flow control */ 156 uint32_t st_drop_count; 157 /* 158 * Number of times the srs gets blocked due to lack of Tx 159 * desc is noted down. Corresponding wakeup from driver 160 * to unblock is also noted down. They should match in a 161 * correctly working setup. If there is less unblocks 162 * than blocks, then Tx side waits forever for a wakeup 163 * from below. The following protected by srs_lock. 164 */ 165 uint32_t st_blocked_cnt; /* times blocked for Tx descs */ 166 uint32_t st_unblocked_cnt; /* unblock calls from driver */ 167 uint32_t st_hiwat_cnt; /* times blocked for Tx descs */ 168 } mac_srs_tx_t; 169 170 /* Receive side Soft Ring Set */ 171 typedef struct mac_srs_rx_s { 172 /* 173 * Upcall Function for fanout, Rx processing etc. Perhaps 174 * the same 3 members below can be used for Tx 175 * processing, but looking around, mac_rx_func_t has 176 * proliferated too much into various files at different 177 * places. I am leaving the consolidation battle for 178 * another day. 179 */ 180 mac_direct_rx_t sr_func; /* srs_lock */ 181 void *sr_arg1; /* srs_lock */ 182 mac_resource_handle_t sr_arg2; /* srs_lock */ 183 mac_rx_func_t sr_lower_proc; /* Atomically changed */ 184 uint32_t sr_poll_pkt_cnt; 185 uint32_t sr_poll_thres; 186 187 /* mblk cnt to apply flow control */ 188 uint32_t sr_hiwat; 189 /* mblk cnt to relieve flow control */ 190 uint32_t sr_lowat; 191 uint32_t sr_poll_count; 192 uint32_t sr_intr_count; 193 uint32_t sr_drop_count; 194 195 /* Times polling was enabled */ 196 uint32_t sr_poll_on; 197 /* Times polling was enabled by worker thread */ 198 uint32_t sr_worker_poll_on; 199 /* Times polling was disabled */ 200 uint32_t sr_poll_off; 201 /* Poll thread signalled count */ 202 uint32_t sr_poll_thr_sig; 203 /* Poll thread busy */ 204 uint32_t sr_poll_thr_busy; 205 /* SRS drains, stays in poll mode but doesn't poll */ 206 uint32_t sr_poll_drain_no_poll; 207 /* 208 * SRS has nothing to do and no packets in H/W but 209 * there is a backlog in softrings. SRS stays in 210 * poll mode but doesn't do polling. 211 */ 212 uint32_t sr_poll_no_poll; 213 /* Active polling restarted */ 214 uint32_t sr_below_hiwat; 215 /* Found packets in last poll so try and poll again */ 216 uint32_t sr_poll_again; 217 /* 218 * Packets in queue but poll thread not allowed to process so 219 * signal the worker thread. 220 */ 221 uint32_t sr_poll_sig_worker; 222 /* 223 * Poll thread has nothing to do and H/W has nothing so 224 * reenable the interrupts. 225 */ 226 uint32_t sr_poll_intr_enable; 227 /* 228 * Poll thread has nothing to do and worker thread was already 229 * running so it can decide to reenable interrupt or poll again. 230 */ 231 uint32_t sr_poll_goto_sleep; 232 /* Worker thread goes back to draining the queue */ 233 uint32_t sr_drain_again; 234 /* More Packets in queue so signal the poll thread to drain */ 235 uint32_t sr_drain_poll_sig; 236 /* More Packets in queue so signal the worker thread to drain */ 237 uint32_t sr_drain_worker_sig; 238 /* Poll thread is already running so worker has nothing to do */ 239 uint32_t sr_drain_poll_running; 240 /* We have packets already queued so keep polling */ 241 uint32_t sr_drain_keep_polling; 242 /* Drain is done and interrupts are reenabled */ 243 uint32_t sr_drain_finish_intr; 244 /* Polling thread needs to schedule worker wakeup */ 245 uint32_t sr_poll_worker_wakeup; 246 247 /* Chains less than 10 pkts */ 248 uint32_t sr_chain_cnt_undr10; 249 /* Chains between 10 & 50 pkts */ 250 uint32_t sr_chain_cnt_10to50; 251 /* Chains over 50 pkts */ 252 uint32_t sr_chain_cnt_over50; 253 } mac_srs_rx_t; 254 255 /* 256 * mac_soft_ring_set_s: 257 * This is used both for Tx and Rx side. The srs_type identifies Rx or 258 * Tx type. 259 * 260 * Note that the structure is carefully crafted, with Rx elements coming 261 * first followed by Tx specific members. Future additions to this 262 * structure should follow the same guidelines. 263 * 264 * Rx-side notes: 265 * mac_rx_classify_flow_add() always creates a mac_soft_ring_set_t and fn_flow 266 * points to info from it (func = srs_lower_proc, arg = soft_ring_set). On 267 * interrupt path, srs_lower_proc does B/W adjustment and switch to polling mode 268 * (if poll capable) and feeds the packets to soft_ring_list via choosen 269 * fanout type (specified by srs_type). In poll mode, the poll thread which is 270 * also a pointer can pick up the packets and feed them to various 271 * soft_ring_list. 272 * 273 * The srs_type can either be protocol based or fanout based where fanout itelf 274 * can be various types 275 * 276 * The polling works by turning off interrupts as soon as a packets 277 * are queued on the soft ring set. Once the backlog is clear and poll 278 * thread return empty handed i.e. Rx ring doesn't have anything, the 279 * interrupt is turned back on. For this purpose we keep a separate 280 * srs_poll_pkt_cnt counter which tracks the packets queued between SRS 281 * and the soft rings as well. The counter is incremented when packets 282 * are queued and decremented when SRS processes them (in case it has 283 * no soft rings) or the soft ring process them. Its important that 284 * in case SRS has softrings, the decrement doesn't happen till the 285 * packet is processed by the soft rings since it takes very little time 286 * for SRS to queue packet from SRS to soft rings and it will keep 287 * bringing more packets in the system faster than soft rings can 288 * process them. 289 * 290 * Tx side notes: 291 * The srs structure acts as a serializer with a worker thread. The 292 * default behavior of srs though is to act as a pass-thru. The queues 293 * (srs_first, srs_last, srs_count) get used when Tx ring runs out of Tx 294 * descriptors or to enforce bandwidth limits. 295 * 296 * When multiple Tx rings are present, the SRS state will be set to 297 * SRS_FANOUT_OTH. Outgoing packets coming into mac_tx_srs_process() 298 * function will be fanned out to one of the Tx side soft rings based on 299 * a hint passed in mac_tx_srs_process(). Each soft ring, in turn, will 300 * be associated with a distinct h/w Tx ring. 301 */ 302 303 struct mac_soft_ring_set_s { 304 /* 305 * Common elements, common to both Rx and Tx SRS type. 306 * The following block of fields are protected by srs_lock 307 */ 308 kmutex_t srs_lock; 309 uint32_t srs_type; 310 uint32_t srs_state; /* state flags */ 311 uint32_t srs_count; 312 mblk_t *srs_first; /* first mblk chain or NULL */ 313 mblk_t *srs_last; /* last mblk chain or NULL */ 314 kcondvar_t srs_async; /* cv for worker thread */ 315 kcondvar_t srs_cv; /* cv for poll thread */ 316 kcondvar_t srs_quiesce_done_cv; /* cv for removal */ 317 timeout_id_t srs_tid; /* timeout id for pending timeout */ 318 319 /* 320 * List of soft rings & processing function. 321 * The following block is protected by Rx quiescence. 322 * i.e. they can be changed only after quiescing the SRS 323 * Protected by srs_lock. 324 */ 325 mac_soft_ring_t *srs_soft_ring_head; 326 mac_soft_ring_t *srs_soft_ring_tail; 327 int srs_soft_ring_count; 328 int srs_soft_ring_quiesced_count; 329 int srs_soft_ring_condemned_count; 330 mac_soft_ring_t **srs_tcp_soft_rings; 331 int srs_tcp_ring_count; 332 mac_soft_ring_t **srs_udp_soft_rings; 333 int srs_udp_ring_count; 334 /* 335 * srs_oth_soft_rings is also used by tx_srs in 336 * when operating in multi tx ring mode. 337 */ 338 mac_soft_ring_t **srs_oth_soft_rings; 339 int srs_oth_ring_count; 340 341 /* 342 * Bandwidth control related members. 343 * They are common to both Rx- and Tx-side. 344 * Following protected by srs_lock 345 */ 346 mac_bw_ctl_t *srs_bw; 347 size_t srs_size; /* Size of packets queued in bytes */ 348 pri_t srs_pri; 349 350 mac_soft_ring_set_t *srs_next; /* mac_srs_g_lock */ 351 mac_soft_ring_set_t *srs_prev; /* mac_srs_g_lock */ 352 353 /* Attribute specific drain func (BW ctl vs non-BW ctl) */ 354 mac_srs_drain_proc_t srs_drain_func; /* Write once (WO) */ 355 356 /* 357 * If the associated ring is exclusively used by a mac client, e.g., 358 * an aggregation, this fields is used to keep a reference to the 359 * MAC client's pseudo ring. 360 */ 361 mac_resource_handle_t srs_mrh; 362 /* 363 * The following blocks are write once (WO) and valid for the life 364 * of the SRS 365 */ 366 struct mac_client_impl_s *srs_mcip; /* back ptr to mac client */ 367 void *srs_flent; /* back ptr to flent */ 368 mac_ring_t *srs_ring; /* Ring Descriptor */ 369 370 /* Teardown, disable control ops */ 371 kcondvar_t srs_client_cv; /* Client wait for the control op */ 372 373 kthread_t *srs_worker; /* WO, worker thread */ 374 kthread_t *srs_poll_thr; /* WO, poll thread */ 375 376 uint_t srs_ind; /* Round Robin indx for picking up SR */ 377 processorid_t srs_worker_cpuid; /* processor to bind to */ 378 processorid_t srs_worker_cpuid_save; /* saved cpuid during offline */ 379 processorid_t srs_poll_cpuid; /* processor to bind to */ 380 processorid_t srs_poll_cpuid_save; /* saved cpuid during offline */ 381 uint_t srs_fanout_state; 382 mac_cpus_t srs_cpu; 383 384 mac_srs_rx_t srs_rx; 385 mac_srs_tx_t srs_tx; 386 }; 387 388 /* 389 * type flags - combination allowed to process and drain the queue 390 */ 391 #define ST_RING_WORKER_ONLY 0x0001 /* Worker thread only */ 392 #define ST_RING_ANY 0x0002 /* Any thread can process the queue */ 393 #define ST_RING_TCP 0x0004 394 #define ST_RING_UDP 0x0008 395 #define ST_RING_OTH 0x0010 396 397 #define ST_RING_BW_CTL 0x0020 398 #define ST_RING_TX 0x0040 399 400 /* 401 * State flags. 402 */ 403 #define S_RING_PROC 0x0001 /* being processed */ 404 #define S_RING_BOUND 0x0002 /* Worker thread is bound to a cpu */ 405 #define S_RING_BLOCK 0x0004 /* No Tx descs */ 406 #define S_RING_TX_HIWAT 0x0008 /* Tx high watermark reached */ 407 408 #define S_RING_WAKEUP_CLIENT 0x0010 /* flow ctrl, client wakeup needed */ 409 #define S_RING_BLANK 0x0020 /* Has been put into polling mode */ 410 #define S_RING_CLIENT_WAIT 0x0040 /* Client waiting for control op */ 411 412 #define S_RING_CONDEMNED 0x0100 /* Being torn down */ 413 #define S_RING_CONDEMNED_DONE 0x0200 /* Being torn down */ 414 #define S_RING_QUIESCE 0x0400 /* No traffic flow, transient flag */ 415 #define S_RING_QUIESCE_DONE 0x0800 /* No traffic flow, transient flag */ 416 417 #define S_RING_RESTART 0x1000 /* Go back to normal traffic flow */ 418 #define S_RING_ENQUEUED 0x2000 /* Pkts enqueued in Tx soft ring */ 419 420 /* 421 * arguments for processors to bind to 422 */ 423 #define S_RING_BIND_NONE -1 424 425 /* 426 * defines for srs_type - identifies a link or a sub-flow 427 * and other static characteristics of a SRS like a tx 428 * srs, tcp only srs, etc. 429 */ 430 #define SRST_LINK 0x00000001 431 #define SRST_FLOW 0x00000002 432 #define SRST_NO_SOFT_RINGS 0x00000004 433 #define SRST_TCP_ONLY 0x00000008 434 435 #define SRST_FANOUT_PROTO 0x00000010 436 #define SRST_FANOUT_SRC_IP 0x00000020 437 #define SRST_FANOUT_OTH 0x00000040 438 #define SRST_DEFAULT_GRP 0x00000080 439 440 #define SRST_TX 0x00000100 441 #define SRST_BW_CONTROL 0x00000200 442 #define SRST_DIRECT_POLL 0x00000400 443 444 #define SRST_DLS_BYPASS 0x00001000 445 #define SRST_CLIENT_POLL_ENABLED 0x00002000 446 447 /* 448 * soft ring set flags. These bits are dynamic in nature and get 449 * applied to srs_state. They reflect the state of SRS at any 450 * point of time 451 */ 452 #define SRS_BLANK 0x00000001 453 #define SRS_WORKER_BOUND 0x00000002 454 #define SRS_POLL_BOUND 0x00000004 455 #define SRS_POLLING_CAPAB 0x00000008 456 457 #define SRS_PROC 0x00000010 458 #define SRS_GET_PKTS 0x00000020 459 #define SRS_POLLING 0x00000040 460 #define SRS_BW_ENFORCED 0x00000080 461 462 #define SRS_WORKER 0x00000100 463 #define SRS_ENQUEUED 0x00000200 464 #define SRS_ANY_PROCESS 0x00000400 465 #define SRS_PROC_FAST 0x00000800 466 467 #define SRS_POLL_PROC 0x00001000 468 #define SRS_TX_BLOCKED 0x00002000 /* out of Tx descs */ 469 #define SRS_TX_HIWAT 0x00004000 /* Tx count exceeds hiwat */ 470 #define SRS_TX_WAKEUP_CLIENT 0x00008000 /* Flow-ctl: wakeup client */ 471 472 #define SRS_CLIENT_PROC 0x00010000 473 #define SRS_CLIENT_WAIT 0x00020000 474 #define SRS_QUIESCE 0x00040000 475 #define SRS_QUIESCE_DONE 0x00080000 476 477 #define SRS_CONDEMNED 0x00100000 478 #define SRS_CONDEMNED_DONE 0x00200000 479 #define SRS_POLL_THR_QUIESCED 0x00400000 480 #define SRS_RESTART 0x00800000 481 482 #define SRS_RESTART_DONE 0x01000000 483 #define SRS_POLL_THR_RESTART 0x02000000 484 #define SRS_IN_GLIST 0x04000000 485 #define SRS_POLL_THR_EXITED 0x08000000 486 487 #define SRS_QUIESCE_PERM 0x10000000 488 #define SRS_LATENCY_OPT 0x20000000 489 #define SRS_SOFTRING_QUEUE 0x40000000 490 491 #define SRS_QUIESCED(srs) (srs->srs_state & SRS_QUIESCE_DONE) 492 493 /* 494 * If the SRS_QUIESCE_PERM flag is set, the SRS worker thread will not be 495 * able to be restarted. 496 */ 497 #define SRS_QUIESCED_PERMANENT(srs) (srs->srs_state & SRS_QUIESCE_PERM) 498 499 /* 500 * soft ring set (SRS) Tx modes 501 */ 502 typedef enum { 503 SRS_TX_DEFAULT = 0, 504 SRS_TX_SERIALIZE, 505 SRS_TX_FANOUT, 506 SRS_TX_BW, 507 SRS_TX_BW_FANOUT 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 TX_MULTI_RING_MODE(mac_srs) \ 627 ((mac_srs)->srs_tx.st_mode == SRS_TX_FANOUT || \ 628 (mac_srs)->srs_tx.st_mode == SRS_TX_BW_FANOUT) 629 630 /* Soft ring flags for teardown */ 631 #define SRS_POLL_THR_OWNER (SRS_PROC | SRS_POLLING | SRS_GET_PKTS) 632 #define SRS_PAUSE (SRS_CONDEMNED | SRS_QUIESCE) 633 #define S_RING_PAUSE (S_RING_CONDEMNED | S_RING_QUIESCE) 634 635 /* Soft rings */ 636 extern void mac_soft_ring_init(void); 637 extern void mac_soft_ring_finish(void); 638 extern void mac_fanout_setup(mac_client_impl_t *, flow_entry_t *, 639 mac_resource_props_t *, mac_direct_rx_t, void *, mac_resource_handle_t); 640 641 extern void mac_soft_ring_worker_wakeup(mac_soft_ring_t *); 642 extern void mac_soft_ring_blank(void *, time_t, uint_t, int); 643 extern mblk_t *mac_soft_ring_poll(mac_soft_ring_t *, int); 644 extern void mac_soft_ring_destroy(mac_soft_ring_t *); 645 extern void mac_soft_ring_dls_bypass(void *, mac_direct_rx_t, void *); 646 647 /* Rx SRS */ 648 extern mac_soft_ring_set_t *mac_srs_create(struct mac_client_impl_s *, 649 flow_entry_t *, uint32_t, mac_direct_rx_t, void *, mac_resource_handle_t, 650 mac_ring_t *); 651 extern void mac_srs_free(mac_soft_ring_set_t *); 652 extern void mac_srs_signal(mac_soft_ring_set_t *, uint_t); 653 extern cpu_t *mac_srs_bind(mac_soft_ring_set_t *, processorid_t); 654 655 extern void mac_srs_change_upcall(void *, mac_direct_rx_t, void *); 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 *, 674 flow_entry_t *, uint32_t); 675 extern mac_tx_func_t mac_tx_get_func(uint32_t); 676 extern mblk_t *mac_tx_send(mac_client_handle_t, mac_ring_handle_t, mblk_t *, 677 mac_tx_stats_t *); 678 extern boolean_t mac_tx_srs_ring_present(mac_soft_ring_set_t *, mac_ring_t *); 679 extern void mac_tx_srs_add_ring(mac_soft_ring_set_t *, mac_ring_t *); 680 extern void mac_tx_srs_del_ring(mac_soft_ring_set_t *, mac_ring_t *); 681 extern mac_tx_cookie_t mac_tx_srs_no_desc(mac_soft_ring_set_t *, mblk_t *, 682 uint16_t, mblk_t **); 683 684 /* Subflow specific stuff */ 685 extern int mac_srs_flow_create(struct mac_client_impl_s *, flow_entry_t *, 686 mac_resource_props_t *, int, int, mac_direct_rx_t); 687 extern void mac_srs_update_bwlimit(flow_entry_t *, mac_resource_props_t *); 688 extern void mac_srs_adjust_subflow_bwlimit(struct mac_client_impl_s *); 689 extern void mac_srs_update_drv(struct mac_client_impl_s *); 690 extern void mac_update_srs_priority(mac_soft_ring_set_t *, pri_t); 691 extern void mac_client_update_classifier(mac_client_impl_t *, boolean_t); 692 693 extern void mac_soft_ring_intr_enable(void *); 694 extern boolean_t mac_soft_ring_intr_disable(void *); 695 extern mac_soft_ring_t *mac_soft_ring_create(int, clock_t, void *, uint16_t, 696 pri_t, mac_client_impl_t *, mac_soft_ring_set_t *, 697 processorid_t, mac_direct_rx_t, void *, mac_resource_handle_t); 698 extern cpu_t *mac_soft_ring_bind(mac_soft_ring_t *, processorid_t); 699 extern void mac_soft_ring_unbind(mac_soft_ring_t *); 700 extern void mac_soft_ring_free(mac_soft_ring_t *, boolean_t); 701 extern void mac_soft_ring_signal(mac_soft_ring_t *, uint_t); 702 extern void mac_rx_soft_ring_process(mac_client_impl_t *, mac_soft_ring_t *, 703 mblk_t *, mblk_t *, int, size_t); 704 extern mac_tx_cookie_t mac_tx_soft_ring_process(mac_soft_ring_t *, 705 mblk_t *, uint16_t, mblk_t **); 706 extern void mac_srs_worker_quiesce(mac_soft_ring_set_t *); 707 extern void mac_srs_worker_restart(mac_soft_ring_set_t *); 708 extern void mac_rx_attach_flow_srs(mac_impl_t *, flow_entry_t *, 709 mac_soft_ring_set_t *, mac_ring_t *, mac_classify_type_t); 710 711 extern void mac_rx_srs_drain_bw(mac_soft_ring_set_t *, uint_t); 712 extern void mac_rx_srs_drain(mac_soft_ring_set_t *, uint_t); 713 extern void mac_rx_srs_process(void *, mac_resource_handle_t, mblk_t *, 714 boolean_t); 715 extern void mac_srs_worker(mac_soft_ring_set_t *); 716 extern void mac_rx_srs_poll_ring(mac_soft_ring_set_t *); 717 extern void mac_tx_srs_drain(mac_soft_ring_set_t *, uint_t); 718 719 extern void mac_tx_srs_restart(mac_soft_ring_set_t *); 720 extern void mac_rx_srs_remove(mac_soft_ring_set_t *); 721 722 #ifdef __cplusplus 723 } 724 #endif 725 726 #endif /* _SYS_MAC_SOFT_RING_H */ 727