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 24 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 uint32_t st_ring_count; /* no. of tx rings */ 135 mac_ring_handle_t *st_rings; 136 137 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_drop_count; 160 /* 161 * Number of times the srs gets blocked due to lack of Tx 162 * desc is noted down. Corresponding wakeup from driver 163 * to unblock is also noted down. They should match in a 164 * correctly working setup. If there is less unblocks 165 * than blocks, then Tx side waits forever for a wakeup 166 * from below. The following protected by srs_lock. 167 */ 168 uint32_t st_blocked_cnt; /* times blocked for Tx descs */ 169 uint32_t st_unblocked_cnt; /* unblock calls from driver */ 170 uint32_t st_hiwat_cnt; /* times blocked for Tx descs */ 171 } mac_srs_tx_t; 172 173 /* Receive side Soft Ring Set */ 174 typedef struct mac_srs_rx_s { 175 /* 176 * Upcall Function for fanout, Rx processing etc. Perhaps 177 * the same 3 members below can be used for Tx 178 * processing, but looking around, mac_rx_func_t has 179 * proliferated too much into various files at different 180 * places. I am leaving the consolidation battle for 181 * another day. 182 */ 183 mac_direct_rx_t sr_func; /* srs_lock */ 184 void *sr_arg1; /* srs_lock */ 185 mac_resource_handle_t sr_arg2; /* srs_lock */ 186 mac_rx_func_t sr_lower_proc; /* Atomically changed */ 187 uint32_t sr_poll_pkt_cnt; 188 uint32_t sr_poll_thres; 189 190 /* mblk cnt to apply flow control */ 191 uint32_t sr_hiwat; 192 /* mblk cnt to relieve flow control */ 193 uint32_t sr_lowat; 194 uint32_t sr_poll_count; 195 uint32_t sr_intr_count; 196 uint32_t sr_drop_count; 197 198 /* Times polling was enabled */ 199 uint32_t sr_poll_on; 200 /* Times polling was enabled by worker thread */ 201 uint32_t sr_worker_poll_on; 202 /* Times polling was disabled */ 203 uint32_t sr_poll_off; 204 /* Poll thread signalled count */ 205 uint32_t sr_poll_thr_sig; 206 /* Poll thread busy */ 207 uint32_t sr_poll_thr_busy; 208 /* SRS drains, stays in poll mode but doesn't poll */ 209 uint32_t sr_poll_drain_no_poll; 210 /* 211 * SRS has nothing to do and no packets in H/W but 212 * there is a backlog in softrings. SRS stays in 213 * poll mode but doesn't do polling. 214 */ 215 uint32_t sr_poll_no_poll; 216 /* Active polling restarted */ 217 uint32_t sr_below_hiwat; 218 /* Found packets in last poll so try and poll again */ 219 uint32_t sr_poll_again; 220 /* 221 * Packets in queue but poll thread not allowed to process so 222 * signal the worker thread. 223 */ 224 uint32_t sr_poll_sig_worker; 225 /* 226 * Poll thread has nothing to do and H/W has nothing so 227 * reenable the interrupts. 228 */ 229 uint32_t sr_poll_intr_enable; 230 /* 231 * Poll thread has nothing to do and worker thread was already 232 * running so it can decide to reenable interrupt or poll again. 233 */ 234 uint32_t sr_poll_goto_sleep; 235 /* Worker thread goes back to draining the queue */ 236 uint32_t sr_drain_again; 237 /* More Packets in queue so signal the poll thread to drain */ 238 uint32_t sr_drain_poll_sig; 239 /* More Packets in queue so signal the worker thread to drain */ 240 uint32_t sr_drain_worker_sig; 241 /* Poll thread is already running so worker has nothing to do */ 242 uint32_t sr_drain_poll_running; 243 /* We have packets already queued so keep polling */ 244 uint32_t sr_drain_keep_polling; 245 /* Drain is done and interrupts are reenabled */ 246 uint32_t sr_drain_finish_intr; 247 /* Polling thread needs to schedule worker wakeup */ 248 uint32_t sr_poll_worker_wakeup; 249 250 /* Chains less than 10 pkts */ 251 uint32_t sr_chain_cnt_undr10; 252 /* Chains between 10 & 50 pkts */ 253 uint32_t sr_chain_cnt_10to50; 254 /* Chains over 50 pkts */ 255 uint32_t sr_chain_cnt_over50; 256 } mac_srs_rx_t; 257 258 /* 259 * mac_soft_ring_set_s: 260 * This is used both for Tx and Rx side. The srs_type identifies Rx or 261 * Tx type. 262 * 263 * Note that the structure is carefully crafted, with Rx elements coming 264 * first followed by Tx specific members. Future additions to this 265 * structure should follow the same guidelines. 266 * 267 * Rx-side notes: 268 * mac_rx_classify_flow_add() always creates a mac_soft_ring_set_t and fn_flow 269 * points to info from it (func = srs_lower_proc, arg = soft_ring_set). On 270 * interrupt path, srs_lower_proc does B/W adjustment and switch to polling mode 271 * (if poll capable) and feeds the packets to soft_ring_list via choosen 272 * fanout type (specified by srs_type). In poll mode, the poll thread which is 273 * also a pointer can pick up the packets and feed them to various 274 * soft_ring_list. 275 * 276 * The srs_type can either be protocol based or fanout based where fanout itelf 277 * can be various types 278 * 279 * The polling works by turning off interrupts as soon as a packets 280 * are queued on the soft ring set. Once the backlog is clear and poll 281 * thread return empty handed i.e. Rx ring doesn't have anything, the 282 * interrupt is turned back on. For this purpose we keep a separate 283 * srs_poll_pkt_cnt counter which tracks the packets queued between SRS 284 * and the soft rings as well. The counter is incremented when packets 285 * are queued and decremented when SRS processes them (in case it has 286 * no soft rings) or the soft ring process them. Its important that 287 * in case SRS has softrings, the decrement doesn't happen till the 288 * packet is processed by the soft rings since it takes very little time 289 * for SRS to queue packet from SRS to soft rings and it will keep 290 * bringing more packets in the system faster than soft rings can 291 * process them. 292 * 293 * Tx side notes: 294 * The srs structure acts as a serializer with a worker thread. The 295 * default behavior of srs though is to act as a pass-thru. The queues 296 * (srs_first, srs_last, srs_count) get used when Tx ring runs out of Tx 297 * descriptors or to enforce bandwidth limits. 298 * 299 * When multiple Tx rings are present, the SRS state will be set to 300 * SRS_FANOUT_OTH. Outgoing packets coming into mac_tx_srs_process() 301 * function will be fanned out to one of the Tx side soft rings based on 302 * a hint passed in mac_tx_srs_process(). Each soft ring, in turn, will 303 * be associated with a distinct h/w Tx ring. 304 */ 305 306 struct mac_soft_ring_set_s { 307 /* 308 * Common elements, common to both Rx and Tx SRS type. 309 * The following block of fields are protected by srs_lock 310 */ 311 kmutex_t srs_lock; 312 uint32_t srs_type; 313 uint32_t srs_state; /* state flags */ 314 uint32_t srs_count; 315 mblk_t *srs_first; /* first mblk chain or NULL */ 316 mblk_t *srs_last; /* last mblk chain or NULL */ 317 kcondvar_t srs_async; /* cv for worker thread */ 318 kcondvar_t srs_cv; /* cv for poll thread */ 319 kcondvar_t srs_quiesce_done_cv; /* cv for removal */ 320 timeout_id_t srs_tid; /* timeout id for pending timeout */ 321 322 /* 323 * List of soft rings & processing function. 324 * The following block is protected by Rx quiescence. 325 * i.e. they can be changed only after quiescing the SRS 326 * Protected by srs_lock. 327 */ 328 mac_soft_ring_t *srs_soft_ring_head; 329 mac_soft_ring_t *srs_soft_ring_tail; 330 int srs_soft_ring_count; 331 int srs_soft_ring_quiesced_count; 332 int srs_soft_ring_condemned_count; 333 mac_soft_ring_t **srs_tcp_soft_rings; 334 int srs_tcp_ring_count; 335 mac_soft_ring_t **srs_udp_soft_rings; 336 int srs_udp_ring_count; 337 /* 338 * srs_oth_soft_rings is also used by tx_srs in 339 * when operating in multi tx ring mode. 340 */ 341 mac_soft_ring_t **srs_oth_soft_rings; 342 int srs_oth_ring_count; 343 344 /* 345 * Bandwidth control related members. 346 * They are common to both Rx- and Tx-side. 347 * Following protected by srs_lock 348 */ 349 mac_bw_ctl_t *srs_bw; 350 size_t srs_size; /* Size of packets queued in bytes */ 351 pri_t srs_pri; 352 353 mac_soft_ring_set_t *srs_next; /* mac_srs_g_lock */ 354 mac_soft_ring_set_t *srs_prev; /* mac_srs_g_lock */ 355 356 /* Attribute specific drain func (BW ctl vs non-BW ctl) */ 357 mac_srs_drain_proc_t srs_drain_func; /* Write once (WO) */ 358 359 /* 360 * If the associated ring is exclusively used by a mac client, e.g., 361 * an aggregation, this fields is used to keep a reference to the 362 * MAC client's pseudo ring. 363 */ 364 mac_resource_handle_t srs_mrh; 365 /* 366 * The following blocks are write once (WO) and valid for the life 367 * of the SRS 368 */ 369 struct mac_client_impl_s *srs_mcip; /* back ptr to mac client */ 370 void *srs_flent; /* back ptr to flent */ 371 mac_ring_t *srs_ring; /* Ring Descriptor */ 372 373 /* Teardown, disable control ops */ 374 kcondvar_t srs_client_cv; /* Client wait for the control op */ 375 376 kthread_t *srs_worker; /* WO, worker thread */ 377 kthread_t *srs_poll_thr; /* WO, poll thread */ 378 379 uint_t srs_ind; /* Round Robin indx for picking up SR */ 380 processorid_t srs_worker_cpuid; /* processor to bind to */ 381 processorid_t srs_worker_cpuid_save; /* saved cpuid during offline */ 382 processorid_t srs_poll_cpuid; /* processor to bind to */ 383 processorid_t srs_poll_cpuid_save; /* saved cpuid during offline */ 384 uint_t srs_fanout_state; 385 mac_cpus_t srs_cpu; 386 387 mac_srs_rx_t srs_rx; 388 mac_srs_tx_t srs_tx; 389 }; 390 391 /* 392 * type flags - combination allowed to process and drain the queue 393 */ 394 #define ST_RING_WORKER_ONLY 0x0001 /* Worker thread only */ 395 #define ST_RING_ANY 0x0002 /* Any thread can process the queue */ 396 #define ST_RING_TCP 0x0004 397 #define ST_RING_UDP 0x0008 398 #define ST_RING_OTH 0x0010 399 400 #define ST_RING_BW_CTL 0x0020 401 #define ST_RING_TX 0x0040 402 403 /* 404 * State flags. 405 */ 406 #define S_RING_PROC 0x0001 /* being processed */ 407 #define S_RING_BOUND 0x0002 /* Worker thread is bound to a cpu */ 408 #define S_RING_BLOCK 0x0004 /* No Tx descs */ 409 #define S_RING_TX_HIWAT 0x0008 /* Tx high watermark reached */ 410 411 #define S_RING_WAKEUP_CLIENT 0x0010 /* flow ctrl, client wakeup needed */ 412 #define S_RING_BLANK 0x0020 /* Has been put into polling mode */ 413 #define S_RING_CLIENT_WAIT 0x0040 /* Client waiting for control op */ 414 415 #define S_RING_CONDEMNED 0x0100 /* Being torn down */ 416 #define S_RING_CONDEMNED_DONE 0x0200 /* Being torn down */ 417 #define S_RING_QUIESCE 0x0400 /* No traffic flow, transient flag */ 418 #define S_RING_QUIESCE_DONE 0x0800 /* No traffic flow, transient flag */ 419 420 #define S_RING_RESTART 0x1000 /* Go back to normal traffic flow */ 421 #define S_RING_ENQUEUED 0x2000 /* Pkts enqueued in Tx soft ring */ 422 423 /* 424 * arguments for processors to bind to 425 */ 426 #define S_RING_BIND_NONE -1 427 428 /* 429 * defines for srs_type - identifies a link or a sub-flow 430 * and other static characteristics of a SRS like a tx 431 * srs, tcp only srs, etc. 432 */ 433 #define SRST_LINK 0x00000001 434 #define SRST_FLOW 0x00000002 435 #define SRST_NO_SOFT_RINGS 0x00000004 436 #define SRST_TCP_ONLY 0x00000008 437 438 #define SRST_FANOUT_PROTO 0x00000010 439 #define SRST_FANOUT_SRC_IP 0x00000020 440 #define SRST_FANOUT_OTH 0x00000040 441 #define SRST_DEFAULT_GRP 0x00000080 442 443 #define SRST_TX 0x00000100 444 #define SRST_BW_CONTROL 0x00000200 445 #define SRST_DIRECT_POLL 0x00000400 446 447 #define SRST_DLS_BYPASS 0x00001000 448 #define SRST_CLIENT_POLL_ENABLED 0x00002000 449 450 /* 451 * soft ring set flags. These bits are dynamic in nature and get 452 * applied to srs_state. They reflect the state of SRS at any 453 * point of time 454 */ 455 #define SRS_BLANK 0x00000001 456 #define SRS_WORKER_BOUND 0x00000002 457 #define SRS_POLL_BOUND 0x00000004 458 #define SRS_POLLING_CAPAB 0x00000008 459 460 #define SRS_PROC 0x00000010 461 #define SRS_GET_PKTS 0x00000020 462 #define SRS_POLLING 0x00000040 463 #define SRS_BW_ENFORCED 0x00000080 464 465 #define SRS_WORKER 0x00000100 466 #define SRS_ENQUEUED 0x00000200 467 #define SRS_ANY_PROCESS 0x00000400 468 #define SRS_PROC_FAST 0x00000800 469 470 #define SRS_POLL_PROC 0x00001000 471 #define SRS_TX_BLOCKED 0x00002000 /* out of Tx descs */ 472 #define SRS_TX_HIWAT 0x00004000 /* Tx count exceeds hiwat */ 473 #define SRS_TX_WAKEUP_CLIENT 0x00008000 /* Flow-ctl: wakeup client */ 474 475 #define SRS_CLIENT_PROC 0x00010000 476 #define SRS_CLIENT_WAIT 0x00020000 477 #define SRS_QUIESCE 0x00040000 478 #define SRS_QUIESCE_DONE 0x00080000 479 480 #define SRS_CONDEMNED 0x00100000 481 #define SRS_CONDEMNED_DONE 0x00200000 482 #define SRS_POLL_THR_QUIESCED 0x00400000 483 #define SRS_RESTART 0x00800000 484 485 #define SRS_RESTART_DONE 0x01000000 486 #define SRS_POLL_THR_RESTART 0x02000000 487 #define SRS_IN_GLIST 0x04000000 488 #define SRS_POLL_THR_EXITED 0x08000000 489 490 #define SRS_QUIESCE_PERM 0x10000000 491 #define SRS_LATENCY_OPT 0x20000000 492 #define SRS_SOFTRING_QUEUE 0x40000000 493 494 #define SRS_QUIESCED(srs) (srs->srs_state & SRS_QUIESCE_DONE) 495 496 /* 497 * If the SRS_QUIESCE_PERM flag is set, the SRS worker thread will not be 498 * able to be restarted. 499 */ 500 #define SRS_QUIESCED_PERMANENT(srs) (srs->srs_state & SRS_QUIESCE_PERM) 501 502 /* 503 * soft ring set (SRS) Tx modes 504 */ 505 typedef enum { 506 SRS_TX_DEFAULT = 0, 507 SRS_TX_SERIALIZE, 508 SRS_TX_FANOUT, 509 SRS_TX_BW, 510 SRS_TX_BW_FANOUT 511 } mac_tx_srs_mode_t; 512 513 /* 514 * SRS fanout states 515 */ 516 typedef enum { 517 SRS_FANOUT_UNINIT = 0, 518 SRS_FANOUT_INIT, 519 SRS_FANOUT_REINIT 520 } mac_srs_fanout_state_t; 521 522 /* 523 * Structure for dls statistics 524 */ 525 struct dls_kstats { 526 kstat_named_t dlss_soft_ring_pkt_drop; 527 }; 528 529 extern struct dls_kstats dls_kstat; 530 531 #define DLS_BUMP_STAT(x, y) (dls_kstat.x.value.ui32 += y) 532 533 /* Turn dynamic polling off */ 534 #define MAC_SRS_POLLING_OFF(mac_srs) { \ 535 ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock)); \ 536 if (((mac_srs)->srs_state & (SRS_POLLING_CAPAB|SRS_POLLING)) == \ 537 (SRS_POLLING_CAPAB|SRS_POLLING)) { \ 538 (mac_srs)->srs_state &= ~SRS_POLLING; \ 539 (void) mac_hwring_enable_intr((mac_ring_handle_t) \ 540 (mac_srs)->srs_ring); \ 541 (mac_srs)->srs_rx.sr_poll_off++; \ 542 } \ 543 } 544 545 #define MAC_COUNT_CHAIN(mac_srs, head, tail, cnt, sz) { \ 546 mblk_t *tmp; \ 547 boolean_t bw_ctl = B_FALSE; \ 548 \ 549 ASSERT((head) != NULL); \ 550 cnt = 0; \ 551 sz = 0; \ 552 if ((mac_srs)->srs_type & SRST_BW_CONTROL) \ 553 bw_ctl = B_TRUE; \ 554 tmp = tail = (head); \ 555 if ((head)->b_next == NULL) { \ 556 cnt = 1; \ 557 if (bw_ctl) \ 558 sz += msgdsize(head); \ 559 } else { \ 560 while (tmp != NULL) { \ 561 tail = tmp; \ 562 cnt++; \ 563 if (bw_ctl) \ 564 sz += msgdsize(tmp); \ 565 tmp = tmp->b_next; \ 566 } \ 567 } \ 568 } 569 570 /* 571 * Decrement the cumulative packet count in SRS and its 572 * soft rings. If the srs_poll_pkt_cnt goes below lowat, then check 573 * if if the interface was left in a polling mode and no one 574 * is really processing the queue (to get the interface out 575 * of poll mode). If no one is processing the queue, then 576 * acquire the PROC and signal the poll thread to check the 577 * interface for packets and get the interface back to interrupt 578 * mode if nothing is found. 579 */ 580 #define MAC_UPDATE_SRS_COUNT_LOCKED(mac_srs, cnt) { \ 581 mac_srs_rx_t *srs_rx = &(mac_srs)->srs_rx; \ 582 ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock)); \ 583 \ 584 srs_rx->sr_poll_pkt_cnt -= cnt; \ 585 if ((srs_rx->sr_poll_pkt_cnt <= srs_rx->sr_poll_thres) && \ 586 (((mac_srs)->srs_state & \ 587 (SRS_POLLING|SRS_PROC|SRS_GET_PKTS)) == SRS_POLLING)) \ 588 { \ 589 (mac_srs)->srs_state |= (SRS_PROC|SRS_GET_PKTS); \ 590 cv_signal(&(mac_srs)->srs_cv); \ 591 srs_rx->sr_below_hiwat++; \ 592 } \ 593 } 594 595 /* 596 * The following two macros are used to update the inbound packet and byte. 597 * count. The packet and byte count reflect the packets and bytes that are 598 * taken out of the SRS's queue, i.e. indicating they are being delivered. 599 * The srs_count and srs_size are updated in different locations as the 600 * srs_size is also used to take into account any bandwidth limits. The 601 * srs_size is updated only when a soft ring, if any, sends a packet up, 602 * as opposed to updating it when the SRS sends a packet to the SR, i.e. 603 * the srs_size reflects the packets in the SRS and SRs. These 604 * macros decrement the srs_size and srs_count and also increment the 605 * ipackets and ibytes stats resp. 606 * 607 * xxx-venu These are done under srs_lock, for now we still update 608 * mci_stat_ibytes/mci_stat_ipackets atomically, need to check if 609 * just updating them would be accurate enough. 610 * 611 * If we are updating these for a sub-flow SRS, then we need to also 612 * updated it's MAC client bandwidth info, if the MAC client is also 613 * bandwidth regulated. 614 */ 615 #define MAC_UPDATE_SRS_SIZE_LOCKED(srs, sz) { \ 616 if ((srs)->srs_type & SRST_BW_CONTROL) { \ 617 mutex_enter(&(srs)->srs_bw->mac_bw_lock); \ 618 (srs)->srs_bw->mac_bw_sz -= (sz); \ 619 (srs)->srs_bw->mac_bw_used += (sz); \ 620 mutex_exit(&(srs)->srs_bw->mac_bw_lock); \ 621 } \ 622 } 623 624 #define MAC_TX_UPDATE_BW_INFO(srs, sz) { \ 625 (srs)->srs_bw->mac_bw_sz -= (sz); \ 626 (srs)->srs_bw->mac_bw_used += (sz); \ 627 } 628 629 #define TX_MULTI_RING_MODE(mac_srs) \ 630 ((mac_srs)->srs_tx.st_mode == SRS_TX_FANOUT || \ 631 (mac_srs)->srs_tx.st_mode == SRS_TX_BW_FANOUT) 632 633 /* Soft ring flags for teardown */ 634 #define SRS_POLL_THR_OWNER (SRS_PROC | SRS_POLLING | SRS_GET_PKTS) 635 #define SRS_PAUSE (SRS_CONDEMNED | SRS_QUIESCE) 636 #define S_RING_PAUSE (S_RING_CONDEMNED | S_RING_QUIESCE) 637 638 /* Soft rings */ 639 extern void mac_soft_ring_init(void); 640 extern void mac_soft_ring_finish(void); 641 extern void mac_fanout_setup(mac_client_impl_t *, flow_entry_t *, 642 mac_resource_props_t *, mac_direct_rx_t, void *, mac_resource_handle_t); 643 644 extern void mac_soft_ring_worker_wakeup(mac_soft_ring_t *); 645 extern void mac_soft_ring_blank(void *, time_t, uint_t, int); 646 extern mblk_t *mac_soft_ring_poll(mac_soft_ring_t *, int); 647 extern void mac_soft_ring_destroy(mac_soft_ring_t *); 648 extern void mac_soft_ring_dls_bypass(void *, mac_direct_rx_t, void *); 649 650 /* Rx SRS */ 651 extern mac_soft_ring_set_t *mac_srs_create(struct mac_client_impl_s *, 652 flow_entry_t *, uint32_t, mac_direct_rx_t, void *, mac_resource_handle_t, 653 mac_ring_t *); 654 extern void mac_srs_free(mac_soft_ring_set_t *); 655 extern void mac_srs_signal(mac_soft_ring_set_t *, uint_t); 656 extern cpu_t *mac_srs_bind(mac_soft_ring_set_t *, processorid_t); 657 658 extern void mac_srs_change_upcall(void *, mac_direct_rx_t, void *); 659 extern void mac_srs_quiesce_initiate(mac_soft_ring_set_t *); 660 extern void mac_srs_client_poll_enable(struct mac_client_impl_s *, 661 mac_soft_ring_set_t *); 662 extern void mac_srs_client_poll_disable(struct mac_client_impl_s *, 663 mac_soft_ring_set_t *); 664 extern void mac_srs_client_poll_quiesce(struct mac_client_impl_s *, 665 mac_soft_ring_set_t *); 666 extern void mac_srs_client_poll_restart(struct mac_client_impl_s *, 667 mac_soft_ring_set_t *); 668 extern void mac_rx_srs_quiesce(mac_soft_ring_set_t *, uint_t); 669 extern void mac_rx_srs_restart(mac_soft_ring_set_t *); 670 extern void mac_rx_srs_subflow_process(void *, mac_resource_handle_t, mblk_t *, 671 boolean_t); 672 extern void mac_tx_srs_quiesce(mac_soft_ring_set_t *, uint_t); 673 674 /* Tx SRS, Tx softring */ 675 extern void mac_tx_srs_wakeup(mac_soft_ring_set_t *, mac_ring_handle_t); 676 extern void mac_tx_srs_setup(struct mac_client_impl_s *, 677 flow_entry_t *, uint32_t); 678 extern mac_tx_func_t mac_tx_get_func(uint32_t); 679 extern mblk_t *mac_tx_send(mac_client_handle_t, mac_ring_handle_t, mblk_t *, 680 mac_tx_stats_t *); 681 extern boolean_t mac_tx_srs_ring_present(mac_soft_ring_set_t *, mac_ring_t *); 682 extern void mac_tx_srs_add_ring(mac_soft_ring_set_t *, mac_ring_t *); 683 extern void mac_tx_srs_del_ring(mac_soft_ring_set_t *, mac_ring_t *); 684 extern mac_tx_cookie_t mac_tx_srs_no_desc(mac_soft_ring_set_t *, mblk_t *, 685 uint16_t, mblk_t **); 686 687 /* Subflow specific stuff */ 688 extern int mac_srs_flow_create(struct mac_client_impl_s *, flow_entry_t *, 689 mac_resource_props_t *, int, int, mac_direct_rx_t); 690 extern void mac_srs_update_bwlimit(flow_entry_t *, mac_resource_props_t *); 691 extern void mac_srs_adjust_subflow_bwlimit(struct mac_client_impl_s *); 692 extern void mac_srs_update_drv(struct mac_client_impl_s *); 693 extern void mac_update_srs_priority(mac_soft_ring_set_t *, pri_t); 694 extern void mac_client_update_classifier(mac_client_impl_t *, boolean_t); 695 696 extern void mac_soft_ring_intr_enable(void *); 697 extern boolean_t mac_soft_ring_intr_disable(void *); 698 extern mac_soft_ring_t *mac_soft_ring_create(int, clock_t, void *, uint16_t, 699 pri_t, mac_client_impl_t *, mac_soft_ring_set_t *, 700 processorid_t, mac_direct_rx_t, void *, mac_resource_handle_t); 701 extern cpu_t *mac_soft_ring_bind(mac_soft_ring_t *, processorid_t); 702 extern void mac_soft_ring_unbind(mac_soft_ring_t *); 703 extern void mac_soft_ring_free(mac_soft_ring_t *, boolean_t); 704 extern void mac_soft_ring_signal(mac_soft_ring_t *, uint_t); 705 extern void mac_rx_soft_ring_process(mac_client_impl_t *, mac_soft_ring_t *, 706 mblk_t *, mblk_t *, int, size_t); 707 extern mac_tx_cookie_t mac_tx_soft_ring_process(mac_soft_ring_t *, 708 mblk_t *, uint16_t, mblk_t **); 709 extern void mac_srs_worker_quiesce(mac_soft_ring_set_t *); 710 extern void mac_srs_worker_restart(mac_soft_ring_set_t *); 711 extern void mac_rx_attach_flow_srs(mac_impl_t *, flow_entry_t *, 712 mac_soft_ring_set_t *, mac_ring_t *, mac_classify_type_t); 713 714 extern void mac_rx_srs_drain_bw(mac_soft_ring_set_t *, uint_t); 715 extern void mac_rx_srs_drain(mac_soft_ring_set_t *, uint_t); 716 extern void mac_rx_srs_process(void *, mac_resource_handle_t, mblk_t *, 717 boolean_t); 718 extern void mac_srs_worker(mac_soft_ring_set_t *); 719 extern void mac_rx_srs_poll_ring(mac_soft_ring_set_t *); 720 extern void mac_tx_srs_drain(mac_soft_ring_set_t *, uint_t); 721 722 extern void mac_tx_srs_restart(mac_soft_ring_set_t *); 723 extern void mac_rx_srs_remove(mac_soft_ring_set_t *); 724 725 #ifdef __cplusplus 726 } 727 #endif 728 729 #endif /* _SYS_MAC_SOFT_RING_H */ 730