1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012, 2015 Chelsio Communications, Inc. 5 * All rights reserved. 6 * Written by: Navdeep Parhar <np@FreeBSD.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #ifndef __T4_TOM_H__ 32 #define __T4_TOM_H__ 33 #include <sys/vmem.h> 34 #include "common/t4_hw.h" 35 #include "common/t4_msg.h" 36 #include "tom/t4_tls.h" 37 38 #define LISTEN_HASH_SIZE 32 39 40 /* 41 * Min receive window. We want it to be large enough to accommodate receive 42 * coalescing, handle jumbo frames, and not trigger sender SWS avoidance. 43 */ 44 #define MIN_RCV_WND (24 * 1024U) 45 46 /* 47 * Max receive window supported by HW in bytes. Only a small part of it can 48 * be set through option0, the rest needs to be set through RX_DATA_ACK. 49 */ 50 #define MAX_RCV_WND ((1U << 27) - 1) 51 52 #define DDP_RSVD_WIN (16 * 1024U) 53 #define SB_DDP_INDICATE SB_IN_TOE /* soreceive must respond to indicate */ 54 55 #define USE_DDP_RX_FLOW_CONTROL 56 57 #define PPOD_SZ(n) ((n) * sizeof(struct pagepod)) 58 #define PPOD_SIZE (PPOD_SZ(1)) 59 60 /* TOE PCB flags */ 61 enum { 62 TPF_ATTACHED = (1 << 0), /* a tcpcb refers to this toepcb */ 63 TPF_FLOWC_WR_SENT = (1 << 1), /* firmware flow context WR sent */ 64 TPF_TX_DATA_SENT = (1 << 2), /* some data sent */ 65 TPF_TX_SUSPENDED = (1 << 3), /* tx suspended for lack of resources */ 66 TPF_SEND_FIN = (1 << 4), /* send FIN after all pending data */ 67 TPF_FIN_SENT = (1 << 5), /* FIN has been sent */ 68 TPF_ABORT_SHUTDOWN = (1 << 6), /* connection abort is in progress */ 69 TPF_CPL_PENDING = (1 << 7), /* haven't received the last CPL */ 70 TPF_SYNQE = (1 << 8), /* synq_entry, not really a toepcb */ 71 TPF_SYNQE_EXPANDED = (1 << 9), /* toepcb ready, tid context updated */ 72 TPF_TLS_STARTING = (1 << 10), /* starting TLS receive */ 73 TPF_KTLS = (1 << 11), /* send TLS records from KTLS */ 74 TPF_INITIALIZED = (1 << 12), /* init_toepcb has been called */ 75 TPF_TLS_RECEIVE = (1 << 13), /* should receive TLS records */ 76 TPF_TLS_RX_QUIESCED = (1 << 14), /* RX quiesced for TLS RX startup */ 77 TPF_WAITING_FOR_FINAL = (1<< 15), /* waiting for wakeup on final CPL */ 78 }; 79 80 enum { 81 DDP_OK = (1 << 0), /* OK to turn on DDP */ 82 DDP_SC_REQ = (1 << 1), /* state change (on/off) requested */ 83 DDP_ON = (1 << 2), /* DDP is turned on */ 84 DDP_BUF0_ACTIVE = (1 << 3), /* buffer 0 in use (not invalidated) */ 85 DDP_BUF1_ACTIVE = (1 << 4), /* buffer 1 in use (not invalidated) */ 86 DDP_TASK_ACTIVE = (1 << 5), /* requeue task is queued / running */ 87 DDP_DEAD = (1 << 6), /* toepcb is shutting down */ 88 }; 89 90 struct bio; 91 struct ctl_sg_entry; 92 struct sockopt; 93 struct offload_settings; 94 95 /* 96 * Connection parameters for an offloaded connection. These are mostly (but not 97 * all) hardware TOE parameters. 98 */ 99 struct conn_params { 100 int8_t rx_coalesce; 101 int8_t cong_algo; 102 int8_t tc_idx; 103 int8_t tstamp; 104 int8_t sack; 105 int8_t nagle; 106 int8_t keepalive; 107 int8_t wscale; 108 int8_t ecn; 109 int8_t mtu_idx; 110 int8_t ulp_mode; 111 int8_t tx_align; 112 int16_t txq_idx; /* ofld_txq = &sc->sge.ofld_txq[txq_idx] */ 113 int16_t rxq_idx; /* ofld_rxq = &sc->sge.ofld_rxq[rxq_idx] */ 114 int16_t l2t_idx; 115 uint16_t emss; 116 uint16_t opt0_bufsize; 117 u_int sndbuf; /* controls TP tx pages */ 118 }; 119 120 struct ofld_tx_sdesc { 121 uint32_t plen; /* payload length */ 122 uint8_t tx_credits; /* firmware tx credits (unit is 16B) */ 123 }; 124 125 struct ppod_region { 126 u_int pr_start; 127 u_int pr_len; 128 u_int pr_page_shift[4]; 129 uint32_t pr_tag_mask; /* hardware tagmask for this region. */ 130 uint32_t pr_invalid_bit; /* OR with this to invalidate tag. */ 131 uint32_t pr_alias_mask; /* AND with tag to get alias bits. */ 132 u_int pr_alias_shift; /* shift this much for first alias bit. */ 133 vmem_t *pr_arena; 134 }; 135 136 struct ppod_reservation { 137 struct ppod_region *prsv_pr; 138 uint32_t prsv_tag; /* Full tag: pgsz, alias, tag, color */ 139 u_int prsv_nppods; 140 }; 141 142 struct pageset { 143 TAILQ_ENTRY(pageset) link; 144 vm_page_t *pages; 145 int npages; 146 int flags; 147 int offset; /* offset in first page */ 148 int len; 149 struct ppod_reservation prsv; 150 struct vmspace *vm; 151 vm_offset_t start; 152 u_int vm_timestamp; 153 }; 154 155 TAILQ_HEAD(pagesetq, pageset); 156 157 #define PS_PPODS_WRITTEN 0x0001 /* Page pods written to the card. */ 158 159 struct ddp_buffer { 160 struct pageset *ps; 161 162 struct kaiocb *job; 163 int cancel_pending; 164 }; 165 166 struct ddp_pcb { 167 u_int flags; 168 struct ddp_buffer db[2]; 169 TAILQ_HEAD(, pageset) cached_pagesets; 170 TAILQ_HEAD(, kaiocb) aiojobq; 171 u_int waiting_count; 172 u_int active_count; 173 u_int cached_count; 174 int active_id; /* the currently active DDP buffer */ 175 struct task requeue_task; 176 struct kaiocb *queueing; 177 struct mtx lock; 178 }; 179 180 struct toepcb { 181 struct tom_data *td; 182 struct inpcb *inp; /* backpointer to host stack's PCB */ 183 u_int flags; /* miscellaneous flags */ 184 TAILQ_ENTRY(toepcb) link; /* toep_list */ 185 int refcount; 186 struct vnet *vnet; 187 struct vi_info *vi; /* virtual interface */ 188 struct sge_ofld_txq *ofld_txq; 189 struct sge_ofld_rxq *ofld_rxq; 190 struct sge_wrq *ctrlq; 191 struct l2t_entry *l2te; /* L2 table entry used by this connection */ 192 struct clip_entry *ce; /* CLIP table entry used by this tid */ 193 int tid; /* Connection identifier */ 194 195 /* tx credit handling */ 196 u_int tx_total; /* total tx WR credits (in 16B units) */ 197 u_int tx_credits; /* tx WR credits (in 16B units) available */ 198 u_int tx_nocompl; /* tx WR credits since last compl request */ 199 u_int plen_nocompl; /* payload since last compl request */ 200 201 struct conn_params params; 202 203 void *ulpcb; 204 void *ulpcb2; 205 struct mbufq ulp_pduq; /* PDUs waiting to be sent out. */ 206 struct mbufq ulp_pdu_reclaimq; 207 208 struct ddp_pcb ddp; 209 struct tls_ofld_info tls; 210 211 TAILQ_HEAD(, kaiocb) aiotx_jobq; 212 struct task aiotx_task; 213 struct socket *aiotx_so; 214 215 /* Tx software descriptor */ 216 uint8_t txsd_total; 217 uint8_t txsd_pidx; 218 uint8_t txsd_cidx; 219 uint8_t txsd_avail; 220 struct ofld_tx_sdesc txsd[]; 221 }; 222 223 static inline int 224 ulp_mode(struct toepcb *toep) 225 { 226 227 return (toep->params.ulp_mode); 228 } 229 230 #define DDP_LOCK(toep) mtx_lock(&(toep)->ddp.lock) 231 #define DDP_UNLOCK(toep) mtx_unlock(&(toep)->ddp.lock) 232 #define DDP_ASSERT_LOCKED(toep) mtx_assert(&(toep)->ddp.lock, MA_OWNED) 233 234 /* 235 * Compressed state for embryonic connections for a listener. 236 */ 237 struct synq_entry { 238 struct listen_ctx *lctx; /* backpointer to listen ctx */ 239 struct mbuf *syn; 240 int flags; /* same as toepcb's tp_flags */ 241 volatile int ok_to_respond; 242 volatile u_int refcnt; 243 int tid; 244 uint32_t iss; 245 uint32_t irs; 246 uint32_t ts; 247 uint32_t rss_hash; 248 __be16 tcp_opt; /* from cpl_pass_establish */ 249 struct toepcb *toep; 250 251 struct conn_params params; 252 }; 253 254 /* listen_ctx flags */ 255 #define LCTX_RPL_PENDING 1 /* waiting for a CPL_PASS_OPEN_RPL */ 256 257 struct listen_ctx { 258 LIST_ENTRY(listen_ctx) link; /* listen hash linkage */ 259 volatile int refcount; 260 int stid; 261 struct stid_region stid_region; 262 int flags; 263 struct inpcb *inp; /* listening socket's inp */ 264 struct vnet *vnet; 265 struct sge_wrq *ctrlq; 266 struct sge_ofld_rxq *ofld_rxq; 267 struct clip_entry *ce; 268 }; 269 270 /* tcb_histent flags */ 271 #define TE_RPL_PENDING 1 272 #define TE_ACTIVE 2 273 274 /* bits in one 8b tcb_histent sample. */ 275 #define TS_RTO (1 << 0) 276 #define TS_DUPACKS (1 << 1) 277 #define TS_FASTREXMT (1 << 2) 278 #define TS_SND_BACKLOGGED (1 << 3) 279 #define TS_CWND_LIMITED (1 << 4) 280 #define TS_ECN_ECE (1 << 5) 281 #define TS_ECN_CWR (1 << 6) 282 #define TS_RESERVED (1 << 7) /* Unused. */ 283 284 struct tcb_histent { 285 struct mtx te_lock; 286 struct callout te_callout; 287 uint64_t te_tcb[TCB_SIZE / sizeof(uint64_t)]; 288 struct adapter *te_adapter; 289 u_int te_flags; 290 u_int te_tid; 291 uint8_t te_pidx; 292 uint8_t te_sample[100]; 293 }; 294 295 struct tom_data { 296 struct toedev tod; 297 298 /* toepcb's associated with this TOE device */ 299 struct mtx toep_list_lock; 300 TAILQ_HEAD(, toepcb) toep_list; 301 302 struct mtx lctx_hash_lock; 303 LIST_HEAD(, listen_ctx) *listen_hash; 304 u_long listen_mask; 305 int lctx_count; /* # of lctx in the hash table */ 306 307 struct ppod_region pr; 308 309 struct rwlock tcb_history_lock __aligned(CACHE_LINE_SIZE); 310 struct tcb_histent **tcb_history; 311 int dupack_threshold; 312 313 /* WRs that will not be sent to the chip because L2 resolution failed */ 314 struct mtx unsent_wr_lock; 315 STAILQ_HEAD(, wrqe) unsent_wr_list; 316 struct task reclaim_wr_resources; 317 }; 318 319 static inline struct tom_data * 320 tod_td(struct toedev *tod) 321 { 322 323 return (__containerof(tod, struct tom_data, tod)); 324 } 325 326 static inline struct adapter * 327 td_adapter(struct tom_data *td) 328 { 329 330 return (td->tod.tod_softc); 331 } 332 333 static inline void 334 set_mbuf_raw_wr(struct mbuf *m, bool raw) 335 { 336 337 M_ASSERTPKTHDR(m); 338 m->m_pkthdr.PH_per.eight[6] = raw; 339 } 340 341 static inline bool 342 mbuf_raw_wr(struct mbuf *m) 343 { 344 345 M_ASSERTPKTHDR(m); 346 return (m->m_pkthdr.PH_per.eight[6]); 347 } 348 349 static inline void 350 set_mbuf_ulp_submode(struct mbuf *m, uint8_t ulp_submode) 351 { 352 353 M_ASSERTPKTHDR(m); 354 m->m_pkthdr.PH_per.eight[0] = ulp_submode; 355 } 356 357 static inline uint8_t 358 mbuf_ulp_submode(struct mbuf *m) 359 { 360 361 M_ASSERTPKTHDR(m); 362 return (m->m_pkthdr.PH_per.eight[0]); 363 } 364 365 static inline void 366 set_mbuf_iscsi_iso(struct mbuf *m, bool iso) 367 { 368 369 M_ASSERTPKTHDR(m); 370 m->m_pkthdr.PH_per.eight[1] = iso; 371 } 372 373 static inline bool 374 mbuf_iscsi_iso(struct mbuf *m) 375 { 376 377 M_ASSERTPKTHDR(m); 378 return (m->m_pkthdr.PH_per.eight[1]); 379 } 380 381 /* Flags for iSCSI segmentation offload. */ 382 #define CXGBE_ISO_TYPE(flags) ((flags) & 0x3) 383 #define CXGBE_ISO_F 0x4 384 385 static inline void 386 set_mbuf_iscsi_iso_flags(struct mbuf *m, uint8_t flags) 387 { 388 389 M_ASSERTPKTHDR(m); 390 m->m_pkthdr.PH_per.eight[2] = flags; 391 } 392 393 static inline uint8_t 394 mbuf_iscsi_iso_flags(struct mbuf *m) 395 { 396 397 M_ASSERTPKTHDR(m); 398 return (m->m_pkthdr.PH_per.eight[2]); 399 } 400 401 static inline void 402 set_mbuf_iscsi_iso_mss(struct mbuf *m, uint16_t mss) 403 { 404 405 M_ASSERTPKTHDR(m); 406 m->m_pkthdr.PH_per.sixteen[2] = mss; 407 } 408 409 static inline uint16_t 410 mbuf_iscsi_iso_mss(struct mbuf *m) 411 { 412 413 M_ASSERTPKTHDR(m); 414 return (m->m_pkthdr.PH_per.sixteen[2]); 415 } 416 417 /* t4_tom.c */ 418 struct toepcb *alloc_toepcb(struct vi_info *, int); 419 int init_toepcb(struct vi_info *, struct toepcb *); 420 struct toepcb *hold_toepcb(struct toepcb *); 421 void free_toepcb(struct toepcb *); 422 void offload_socket(struct socket *, struct toepcb *); 423 void restore_so_proto(struct socket *, bool); 424 void undo_offload_socket(struct socket *); 425 void final_cpl_received(struct toepcb *); 426 void insert_tid(struct adapter *, int, void *, int); 427 void *lookup_tid(struct adapter *, int); 428 void update_tid(struct adapter *, int, void *); 429 void remove_tid(struct adapter *, int, int); 430 u_long select_rcv_wnd(struct socket *); 431 int select_rcv_wscale(void); 432 void init_conn_params(struct vi_info *, struct offload_settings *, 433 struct in_conninfo *, struct socket *, const struct tcp_options *, int16_t, 434 struct conn_params *cp); 435 __be64 calc_options0(struct vi_info *, struct conn_params *); 436 __be32 calc_options2(struct vi_info *, struct conn_params *); 437 uint64_t select_ntuple(struct vi_info *, struct l2t_entry *); 438 int negative_advice(int); 439 int add_tid_to_history(struct adapter *, u_int); 440 441 /* t4_connect.c */ 442 void t4_init_connect_cpl_handlers(void); 443 void t4_uninit_connect_cpl_handlers(void); 444 int t4_connect(struct toedev *, struct socket *, struct nhop_object *, 445 struct sockaddr *); 446 void act_open_failure_cleanup(struct adapter *, u_int, u_int); 447 448 /* t4_listen.c */ 449 void t4_init_listen_cpl_handlers(void); 450 void t4_uninit_listen_cpl_handlers(void); 451 int t4_listen_start(struct toedev *, struct tcpcb *); 452 int t4_listen_stop(struct toedev *, struct tcpcb *); 453 void t4_syncache_added(struct toedev *, void *); 454 void t4_syncache_removed(struct toedev *, void *); 455 int t4_syncache_respond(struct toedev *, void *, struct mbuf *); 456 int do_abort_req_synqe(struct sge_iq *, const struct rss_header *, 457 struct mbuf *); 458 int do_abort_rpl_synqe(struct sge_iq *, const struct rss_header *, 459 struct mbuf *); 460 void t4_offload_socket(struct toedev *, void *, struct socket *); 461 void synack_failure_cleanup(struct adapter *, int); 462 463 /* t4_cpl_io.c */ 464 void aiotx_init_toep(struct toepcb *); 465 int t4_aio_queue_aiotx(struct socket *, struct kaiocb *); 466 void t4_init_cpl_io_handlers(void); 467 void t4_uninit_cpl_io_handlers(void); 468 void send_abort_rpl(struct adapter *, struct sge_ofld_txq *, int , int); 469 void send_flowc_wr(struct toepcb *, struct tcpcb *); 470 void send_reset(struct adapter *, struct toepcb *, uint32_t); 471 int send_rx_credits(struct adapter *, struct toepcb *, int); 472 void make_established(struct toepcb *, uint32_t, uint32_t, uint16_t); 473 int t4_close_conn(struct adapter *, struct toepcb *); 474 void t4_rcvd(struct toedev *, struct tcpcb *); 475 void t4_rcvd_locked(struct toedev *, struct tcpcb *); 476 int t4_tod_output(struct toedev *, struct tcpcb *); 477 int t4_send_fin(struct toedev *, struct tcpcb *); 478 int t4_send_rst(struct toedev *, struct tcpcb *); 479 void t4_set_tcb_field(struct adapter *, struct sge_wrq *, struct toepcb *, 480 uint16_t, uint64_t, uint64_t, int, int); 481 void t4_push_frames(struct adapter *, struct toepcb *, int); 482 void t4_push_pdus(struct adapter *, struct toepcb *, int); 483 484 /* t4_ddp.c */ 485 int t4_init_ppod_region(struct ppod_region *, struct t4_range *, u_int, 486 const char *); 487 void t4_free_ppod_region(struct ppod_region *); 488 int t4_alloc_page_pods_for_ps(struct ppod_region *, struct pageset *); 489 int t4_alloc_page_pods_for_bio(struct ppod_region *, struct bio *, 490 struct ppod_reservation *); 491 int t4_alloc_page_pods_for_buf(struct ppod_region *, vm_offset_t, int, 492 struct ppod_reservation *); 493 int t4_alloc_page_pods_for_sgl(struct ppod_region *, struct ctl_sg_entry *, int, 494 struct ppod_reservation *); 495 int t4_write_page_pods_for_ps(struct adapter *, struct sge_wrq *, int, 496 struct pageset *); 497 int t4_write_page_pods_for_bio(struct adapter *, struct toepcb *, 498 struct ppod_reservation *, struct bio *, struct mbufq *); 499 int t4_write_page_pods_for_buf(struct adapter *, struct toepcb *, 500 struct ppod_reservation *, vm_offset_t, int, struct mbufq *); 501 int t4_write_page_pods_for_sgl(struct adapter *, struct toepcb *, 502 struct ppod_reservation *, struct ctl_sg_entry *, int, int, struct mbufq *); 503 void t4_free_page_pods(struct ppod_reservation *); 504 int t4_aio_queue_ddp(struct socket *, struct kaiocb *); 505 void t4_ddp_mod_load(void); 506 void t4_ddp_mod_unload(void); 507 void ddp_assert_empty(struct toepcb *); 508 void ddp_uninit_toep(struct toepcb *); 509 void ddp_queue_toep(struct toepcb *); 510 void release_ddp_resources(struct toepcb *toep); 511 void handle_ddp_close(struct toepcb *, struct tcpcb *, uint32_t); 512 void handle_ddp_indicate(struct toepcb *); 513 void insert_ddp_data(struct toepcb *, uint32_t); 514 const struct offload_settings *lookup_offload_policy(struct adapter *, int, 515 struct mbuf *, uint16_t, struct inpcb *); 516 517 /* t4_tls.c */ 518 bool can_tls_offload(struct adapter *); 519 void do_rx_data_tls(const struct cpl_rx_data *, struct toepcb *, struct mbuf *); 520 void t4_push_ktls(struct adapter *, struct toepcb *, int); 521 void tls_received_starting_data(struct adapter *, struct toepcb *, 522 struct sockbuf *, int); 523 void t4_tls_mod_load(void); 524 void t4_tls_mod_unload(void); 525 void tls_init_toep(struct toepcb *); 526 int tls_tx_key(struct toepcb *); 527 void tls_uninit_toep(struct toepcb *); 528 int tls_alloc_ktls(struct toepcb *, struct ktls_session *, int); 529 530 #endif 531