1 /*- 2 * Copyright (c) 2012, 2015 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: Navdeep Parhar <np@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 #include "opt_ratelimit.h" 34 35 #ifdef TCP_OFFLOAD 36 #include <sys/param.h> 37 #include <sys/aio.h> 38 #include <sys/file.h> 39 #include <sys/kernel.h> 40 #include <sys/ktr.h> 41 #include <sys/module.h> 42 #include <sys/proc.h> 43 #include <sys/protosw.h> 44 #include <sys/domain.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/sglist.h> 48 #include <sys/taskqueue.h> 49 #include <netinet/in.h> 50 #include <netinet/in_pcb.h> 51 #include <netinet/ip.h> 52 #include <netinet/ip6.h> 53 #define TCPSTATES 54 #include <netinet/tcp_fsm.h> 55 #include <netinet/tcp_seq.h> 56 #include <netinet/tcp_var.h> 57 #include <netinet/toecore.h> 58 59 #include <security/mac/mac_framework.h> 60 61 #include <vm/vm.h> 62 #include <vm/vm_extern.h> 63 #include <vm/pmap.h> 64 #include <vm/vm_map.h> 65 #include <vm/vm_page.h> 66 67 #include "common/common.h" 68 #include "common/t4_msg.h" 69 #include "common/t4_regs.h" 70 #include "common/t4_tcb.h" 71 #include "tom/t4_tom_l2t.h" 72 #include "tom/t4_tom.h" 73 74 VNET_DECLARE(int, tcp_do_autosndbuf); 75 #define V_tcp_do_autosndbuf VNET(tcp_do_autosndbuf) 76 VNET_DECLARE(int, tcp_autosndbuf_inc); 77 #define V_tcp_autosndbuf_inc VNET(tcp_autosndbuf_inc) 78 VNET_DECLARE(int, tcp_autosndbuf_max); 79 #define V_tcp_autosndbuf_max VNET(tcp_autosndbuf_max) 80 VNET_DECLARE(int, tcp_do_autorcvbuf); 81 #define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf) 82 VNET_DECLARE(int, tcp_autorcvbuf_inc); 83 #define V_tcp_autorcvbuf_inc VNET(tcp_autorcvbuf_inc) 84 VNET_DECLARE(int, tcp_autorcvbuf_max); 85 #define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) 86 87 #define IS_AIOTX_MBUF(m) \ 88 ((m)->m_flags & M_EXT && (m)->m_ext.ext_flags & EXT_FLAG_AIOTX) 89 90 static void t4_aiotx_cancel(struct kaiocb *job); 91 static void t4_aiotx_queue_toep(struct toepcb *toep); 92 93 static size_t 94 aiotx_mbuf_pgoff(struct mbuf *m) 95 { 96 struct aiotx_buffer *ab; 97 98 MPASS(IS_AIOTX_MBUF(m)); 99 ab = m->m_ext.ext_arg1; 100 return ((ab->ps.offset + (uintptr_t)m->m_ext.ext_arg2) % PAGE_SIZE); 101 } 102 103 static vm_page_t * 104 aiotx_mbuf_pages(struct mbuf *m) 105 { 106 struct aiotx_buffer *ab; 107 int npages; 108 109 MPASS(IS_AIOTX_MBUF(m)); 110 ab = m->m_ext.ext_arg1; 111 npages = (ab->ps.offset + (uintptr_t)m->m_ext.ext_arg2) / PAGE_SIZE; 112 return (ab->ps.pages + npages); 113 } 114 115 void 116 send_flowc_wr(struct toepcb *toep, struct flowc_tx_params *ftxp) 117 { 118 struct wrqe *wr; 119 struct fw_flowc_wr *flowc; 120 unsigned int nparams = ftxp ? 8 : 6, flowclen; 121 struct vi_info *vi = toep->vi; 122 struct port_info *pi = vi->pi; 123 struct adapter *sc = pi->adapter; 124 unsigned int pfvf = G_FW_VIID_PFN(vi->viid) << S_FW_VIID_PFN; 125 struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; 126 127 KASSERT(!(toep->flags & TPF_FLOWC_WR_SENT), 128 ("%s: flowc for tid %u sent already", __func__, toep->tid)); 129 130 flowclen = sizeof(*flowc) + nparams * sizeof(struct fw_flowc_mnemval); 131 132 wr = alloc_wrqe(roundup2(flowclen, 16), toep->ofld_txq); 133 if (wr == NULL) { 134 /* XXX */ 135 panic("%s: allocation failure.", __func__); 136 } 137 flowc = wrtod(wr); 138 memset(flowc, 0, wr->wr_len); 139 140 flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) | 141 V_FW_FLOWC_WR_NPARAMS(nparams)); 142 flowc->flowid_len16 = htonl(V_FW_WR_LEN16(howmany(flowclen, 16)) | 143 V_FW_WR_FLOWID(toep->tid)); 144 145 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 146 flowc->mnemval[0].val = htobe32(pfvf); 147 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 148 flowc->mnemval[1].val = htobe32(pi->tx_chan); 149 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 150 flowc->mnemval[2].val = htobe32(pi->tx_chan); 151 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 152 flowc->mnemval[3].val = htobe32(toep->ofld_rxq->iq.abs_id); 153 if (ftxp) { 154 uint32_t sndbuf = min(ftxp->snd_space, sc->tt.sndbuf); 155 156 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 157 flowc->mnemval[4].val = htobe32(ftxp->snd_nxt); 158 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 159 flowc->mnemval[5].val = htobe32(ftxp->rcv_nxt); 160 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 161 flowc->mnemval[6].val = htobe32(sndbuf); 162 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 163 flowc->mnemval[7].val = htobe32(ftxp->mss); 164 165 CTR6(KTR_CXGBE, 166 "%s: tid %u, mss %u, sndbuf %u, snd_nxt 0x%x, rcv_nxt 0x%x", 167 __func__, toep->tid, ftxp->mss, sndbuf, ftxp->snd_nxt, 168 ftxp->rcv_nxt); 169 } else { 170 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDBUF; 171 flowc->mnemval[4].val = htobe32(512); 172 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_MSS; 173 flowc->mnemval[5].val = htobe32(512); 174 175 CTR2(KTR_CXGBE, "%s: tid %u", __func__, toep->tid); 176 } 177 178 txsd->tx_credits = howmany(flowclen, 16); 179 txsd->plen = 0; 180 KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0, 181 ("%s: not enough credits (%d)", __func__, toep->tx_credits)); 182 toep->tx_credits -= txsd->tx_credits; 183 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 184 toep->txsd_pidx = 0; 185 toep->txsd_avail--; 186 187 toep->flags |= TPF_FLOWC_WR_SENT; 188 t4_wrq_tx(sc, wr); 189 } 190 191 #ifdef RATELIMIT 192 /* 193 * Input is Bytes/second (so_max_pacing-rate), chip counts in Kilobits/second. 194 */ 195 static int 196 update_tx_rate_limit(struct adapter *sc, struct toepcb *toep, u_int Bps) 197 { 198 int tc_idx, rc; 199 const u_int kbps = (u_int) (uint64_t)Bps * 8ULL / 1000; 200 const int port_id = toep->vi->pi->port_id; 201 202 CTR3(KTR_CXGBE, "%s: tid %u, rate %uKbps", __func__, toep->tid, kbps); 203 204 if (kbps == 0) { 205 /* unbind */ 206 tc_idx = -1; 207 } else { 208 rc = t4_reserve_cl_rl_kbps(sc, port_id, kbps, &tc_idx); 209 if (rc != 0) 210 return (rc); 211 MPASS(tc_idx >= 0 && tc_idx < sc->chip_params->nsched_cls); 212 } 213 214 if (toep->tc_idx != tc_idx) { 215 struct wrqe *wr; 216 struct fw_flowc_wr *flowc; 217 int nparams = 1, flowclen, flowclen16; 218 struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; 219 220 flowclen = sizeof(*flowc) + nparams * sizeof(struct 221 fw_flowc_mnemval); 222 flowclen16 = howmany(flowclen, 16); 223 if (toep->tx_credits < flowclen16 || toep->txsd_avail == 0 || 224 (wr = alloc_wrqe(roundup2(flowclen, 16), toep->ofld_txq)) == NULL) { 225 if (tc_idx >= 0) 226 t4_release_cl_rl_kbps(sc, port_id, tc_idx); 227 return (ENOMEM); 228 } 229 230 flowc = wrtod(wr); 231 memset(flowc, 0, wr->wr_len); 232 233 flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) | 234 V_FW_FLOWC_WR_NPARAMS(nparams)); 235 flowc->flowid_len16 = htonl(V_FW_WR_LEN16(flowclen16) | 236 V_FW_WR_FLOWID(toep->tid)); 237 238 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS; 239 if (tc_idx == -1) 240 flowc->mnemval[0].val = htobe32(0xff); 241 else 242 flowc->mnemval[0].val = htobe32(tc_idx); 243 244 txsd->tx_credits = flowclen16; 245 txsd->plen = 0; 246 toep->tx_credits -= txsd->tx_credits; 247 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 248 toep->txsd_pidx = 0; 249 toep->txsd_avail--; 250 t4_wrq_tx(sc, wr); 251 } 252 253 if (toep->tc_idx >= 0) 254 t4_release_cl_rl_kbps(sc, port_id, toep->tc_idx); 255 toep->tc_idx = tc_idx; 256 257 return (0); 258 } 259 #endif 260 261 void 262 send_reset(struct adapter *sc, struct toepcb *toep, uint32_t snd_nxt) 263 { 264 struct wrqe *wr; 265 struct cpl_abort_req *req; 266 int tid = toep->tid; 267 struct inpcb *inp = toep->inp; 268 struct tcpcb *tp = intotcpcb(inp); /* don't use if INP_DROPPED */ 269 270 INP_WLOCK_ASSERT(inp); 271 272 CTR6(KTR_CXGBE, "%s: tid %d (%s), toep_flags 0x%x, inp_flags 0x%x%s", 273 __func__, toep->tid, 274 inp->inp_flags & INP_DROPPED ? "inp dropped" : 275 tcpstates[tp->t_state], 276 toep->flags, inp->inp_flags, 277 toep->flags & TPF_ABORT_SHUTDOWN ? 278 " (abort already in progress)" : ""); 279 280 if (toep->flags & TPF_ABORT_SHUTDOWN) 281 return; /* abort already in progress */ 282 283 toep->flags |= TPF_ABORT_SHUTDOWN; 284 285 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 286 ("%s: flowc_wr not sent for tid %d.", __func__, tid)); 287 288 wr = alloc_wrqe(sizeof(*req), toep->ofld_txq); 289 if (wr == NULL) { 290 /* XXX */ 291 panic("%s: allocation failure.", __func__); 292 } 293 req = wrtod(wr); 294 295 INIT_TP_WR_MIT_CPL(req, CPL_ABORT_REQ, tid); 296 if (inp->inp_flags & INP_DROPPED) 297 req->rsvd0 = htobe32(snd_nxt); 298 else 299 req->rsvd0 = htobe32(tp->snd_nxt); 300 req->rsvd1 = !(toep->flags & TPF_TX_DATA_SENT); 301 req->cmd = CPL_ABORT_SEND_RST; 302 303 /* 304 * XXX: What's the correct way to tell that the inp hasn't been detached 305 * from its socket? Should I even be flushing the snd buffer here? 306 */ 307 if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) { 308 struct socket *so = inp->inp_socket; 309 310 if (so != NULL) /* because I'm not sure. See comment above */ 311 sbflush(&so->so_snd); 312 } 313 314 t4_l2t_send(sc, wr, toep->l2te); 315 } 316 317 /* 318 * Called when a connection is established to translate the TCP options 319 * reported by HW to FreeBSD's native format. 320 */ 321 static void 322 assign_rxopt(struct tcpcb *tp, unsigned int opt) 323 { 324 struct toepcb *toep = tp->t_toe; 325 struct inpcb *inp = tp->t_inpcb; 326 struct adapter *sc = td_adapter(toep->td); 327 int n; 328 329 INP_LOCK_ASSERT(inp); 330 331 if (inp->inp_inc.inc_flags & INC_ISIPV6) 332 n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); 333 else 334 n = sizeof(struct ip) + sizeof(struct tcphdr); 335 tp->t_maxseg = sc->params.mtus[G_TCPOPT_MSS(opt)] - n; 336 337 CTR4(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u)", __func__, toep->tid, 338 G_TCPOPT_MSS(opt), sc->params.mtus[G_TCPOPT_MSS(opt)]); 339 340 if (G_TCPOPT_TSTAMP(opt)) { 341 tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */ 342 tp->ts_recent = 0; /* hmmm */ 343 tp->ts_recent_age = tcp_ts_getticks(); 344 } 345 346 if (G_TCPOPT_SACK(opt)) 347 tp->t_flags |= TF_SACK_PERMIT; /* should already be set */ 348 else 349 tp->t_flags &= ~TF_SACK_PERMIT; /* sack disallowed by peer */ 350 351 if (G_TCPOPT_WSCALE_OK(opt)) 352 tp->t_flags |= TF_RCVD_SCALE; 353 354 /* Doing window scaling? */ 355 if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == 356 (TF_RCVD_SCALE | TF_REQ_SCALE)) { 357 tp->rcv_scale = tp->request_r_scale; 358 tp->snd_scale = G_TCPOPT_SND_WSCALE(opt); 359 } 360 } 361 362 /* 363 * Completes some final bits of initialization for just established connections 364 * and changes their state to TCPS_ESTABLISHED. 365 * 366 * The ISNs are from after the exchange of SYNs. i.e., the true ISN + 1. 367 */ 368 void 369 make_established(struct toepcb *toep, uint32_t snd_isn, uint32_t rcv_isn, 370 uint16_t opt) 371 { 372 struct inpcb *inp = toep->inp; 373 struct socket *so = inp->inp_socket; 374 struct tcpcb *tp = intotcpcb(inp); 375 long bufsize; 376 uint32_t iss = be32toh(snd_isn) - 1; /* true ISS */ 377 uint32_t irs = be32toh(rcv_isn) - 1; /* true IRS */ 378 uint16_t tcpopt = be16toh(opt); 379 struct flowc_tx_params ftxp; 380 381 INP_WLOCK_ASSERT(inp); 382 KASSERT(tp->t_state == TCPS_SYN_SENT || 383 tp->t_state == TCPS_SYN_RECEIVED, 384 ("%s: TCP state %s", __func__, tcpstates[tp->t_state])); 385 386 CTR4(KTR_CXGBE, "%s: tid %d, toep %p, inp %p", 387 __func__, toep->tid, toep, inp); 388 389 tp->t_state = TCPS_ESTABLISHED; 390 tp->t_starttime = ticks; 391 TCPSTAT_INC(tcps_connects); 392 393 tp->irs = irs; 394 tcp_rcvseqinit(tp); 395 tp->rcv_wnd = toep->rx_credits << 10; 396 tp->rcv_adv += tp->rcv_wnd; 397 tp->last_ack_sent = tp->rcv_nxt; 398 399 /* 400 * If we were unable to send all rx credits via opt0, save the remainder 401 * in rx_credits so that they can be handed over with the next credit 402 * update. 403 */ 404 SOCKBUF_LOCK(&so->so_rcv); 405 bufsize = select_rcv_wnd(so); 406 SOCKBUF_UNLOCK(&so->so_rcv); 407 toep->rx_credits = bufsize - tp->rcv_wnd; 408 409 tp->iss = iss; 410 tcp_sendseqinit(tp); 411 tp->snd_una = iss + 1; 412 tp->snd_nxt = iss + 1; 413 tp->snd_max = iss + 1; 414 415 assign_rxopt(tp, tcpopt); 416 417 SOCKBUF_LOCK(&so->so_snd); 418 if (so->so_snd.sb_flags & SB_AUTOSIZE && V_tcp_do_autosndbuf) 419 bufsize = V_tcp_autosndbuf_max; 420 else 421 bufsize = sbspace(&so->so_snd); 422 SOCKBUF_UNLOCK(&so->so_snd); 423 424 ftxp.snd_nxt = tp->snd_nxt; 425 ftxp.rcv_nxt = tp->rcv_nxt; 426 ftxp.snd_space = bufsize; 427 ftxp.mss = tp->t_maxseg; 428 send_flowc_wr(toep, &ftxp); 429 430 soisconnected(so); 431 } 432 433 static int 434 send_rx_credits(struct adapter *sc, struct toepcb *toep, int credits) 435 { 436 struct wrqe *wr; 437 struct cpl_rx_data_ack *req; 438 uint32_t dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); 439 440 KASSERT(credits >= 0, ("%s: %d credits", __func__, credits)); 441 442 wr = alloc_wrqe(sizeof(*req), toep->ctrlq); 443 if (wr == NULL) 444 return (0); 445 req = wrtod(wr); 446 447 INIT_TP_WR_MIT_CPL(req, CPL_RX_DATA_ACK, toep->tid); 448 req->credit_dack = htobe32(dack | V_RX_CREDITS(credits)); 449 450 t4_wrq_tx(sc, wr); 451 return (credits); 452 } 453 454 void 455 t4_rcvd_locked(struct toedev *tod, struct tcpcb *tp) 456 { 457 struct adapter *sc = tod->tod_softc; 458 struct inpcb *inp = tp->t_inpcb; 459 struct socket *so = inp->inp_socket; 460 struct sockbuf *sb = &so->so_rcv; 461 struct toepcb *toep = tp->t_toe; 462 int credits; 463 464 INP_WLOCK_ASSERT(inp); 465 466 SOCKBUF_LOCK_ASSERT(sb); 467 KASSERT(toep->sb_cc >= sbused(sb), 468 ("%s: sb %p has more data (%d) than last time (%d).", 469 __func__, sb, sbused(sb), toep->sb_cc)); 470 471 toep->rx_credits += toep->sb_cc - sbused(sb); 472 toep->sb_cc = sbused(sb); 473 474 if (toep->rx_credits > 0 && 475 (tp->rcv_wnd <= 32 * 1024 || toep->rx_credits >= 64 * 1024 || 476 (toep->rx_credits >= 16 * 1024 && tp->rcv_wnd <= 128 * 1024) || 477 toep->sb_cc + tp->rcv_wnd < sb->sb_lowat)) { 478 479 credits = send_rx_credits(sc, toep, toep->rx_credits); 480 toep->rx_credits -= credits; 481 tp->rcv_wnd += credits; 482 tp->rcv_adv += credits; 483 } 484 } 485 486 void 487 t4_rcvd(struct toedev *tod, struct tcpcb *tp) 488 { 489 struct inpcb *inp = tp->t_inpcb; 490 struct socket *so = inp->inp_socket; 491 struct sockbuf *sb = &so->so_rcv; 492 493 SOCKBUF_LOCK(sb); 494 t4_rcvd_locked(tod, tp); 495 SOCKBUF_UNLOCK(sb); 496 } 497 498 /* 499 * Close a connection by sending a CPL_CLOSE_CON_REQ message. 500 */ 501 static int 502 close_conn(struct adapter *sc, struct toepcb *toep) 503 { 504 struct wrqe *wr; 505 struct cpl_close_con_req *req; 506 unsigned int tid = toep->tid; 507 508 CTR3(KTR_CXGBE, "%s: tid %u%s", __func__, toep->tid, 509 toep->flags & TPF_FIN_SENT ? ", IGNORED" : ""); 510 511 if (toep->flags & TPF_FIN_SENT) 512 return (0); 513 514 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 515 ("%s: flowc_wr not sent for tid %u.", __func__, tid)); 516 517 wr = alloc_wrqe(sizeof(*req), toep->ofld_txq); 518 if (wr == NULL) { 519 /* XXX */ 520 panic("%s: allocation failure.", __func__); 521 } 522 req = wrtod(wr); 523 524 req->wr.wr_hi = htonl(V_FW_WR_OP(FW_TP_WR) | 525 V_FW_WR_IMMDLEN(sizeof(*req) - sizeof(req->wr))); 526 req->wr.wr_mid = htonl(V_FW_WR_LEN16(howmany(sizeof(*req), 16)) | 527 V_FW_WR_FLOWID(tid)); 528 req->wr.wr_lo = cpu_to_be64(0); 529 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 530 req->rsvd = 0; 531 532 toep->flags |= TPF_FIN_SENT; 533 toep->flags &= ~TPF_SEND_FIN; 534 t4_l2t_send(sc, wr, toep->l2te); 535 536 return (0); 537 } 538 539 #define MAX_OFLD_TX_CREDITS (SGE_MAX_WR_LEN / 16) 540 #define MIN_OFLD_TX_CREDITS (howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16)) 541 542 /* Maximum amount of immediate data we could stuff in a WR */ 543 static inline int 544 max_imm_payload(int tx_credits) 545 { 546 const int n = 2; /* Use only up to 2 desc for imm. data WR */ 547 548 KASSERT(tx_credits >= 0 && 549 tx_credits <= MAX_OFLD_TX_CREDITS, 550 ("%s: %d credits", __func__, tx_credits)); 551 552 if (tx_credits < MIN_OFLD_TX_CREDITS) 553 return (0); 554 555 if (tx_credits >= (n * EQ_ESIZE) / 16) 556 return ((n * EQ_ESIZE) - sizeof(struct fw_ofld_tx_data_wr)); 557 else 558 return (tx_credits * 16 - sizeof(struct fw_ofld_tx_data_wr)); 559 } 560 561 /* Maximum number of SGL entries we could stuff in a WR */ 562 static inline int 563 max_dsgl_nsegs(int tx_credits) 564 { 565 int nseg = 1; /* ulptx_sgl has room for 1, rest ulp_tx_sge_pair */ 566 int sge_pair_credits = tx_credits - MIN_OFLD_TX_CREDITS; 567 568 KASSERT(tx_credits >= 0 && 569 tx_credits <= MAX_OFLD_TX_CREDITS, 570 ("%s: %d credits", __func__, tx_credits)); 571 572 if (tx_credits < MIN_OFLD_TX_CREDITS) 573 return (0); 574 575 nseg += 2 * (sge_pair_credits * 16 / 24); 576 if ((sge_pair_credits * 16) % 24 == 16) 577 nseg++; 578 579 return (nseg); 580 } 581 582 static inline void 583 write_tx_wr(void *dst, struct toepcb *toep, unsigned int immdlen, 584 unsigned int plen, uint8_t credits, int shove, int ulp_submode, int txalign) 585 { 586 struct fw_ofld_tx_data_wr *txwr = dst; 587 588 txwr->op_to_immdlen = htobe32(V_WR_OP(FW_OFLD_TX_DATA_WR) | 589 V_FW_WR_IMMDLEN(immdlen)); 590 txwr->flowid_len16 = htobe32(V_FW_WR_FLOWID(toep->tid) | 591 V_FW_WR_LEN16(credits)); 592 txwr->lsodisable_to_flags = htobe32(V_TX_ULP_MODE(toep->ulp_mode) | 593 V_TX_ULP_SUBMODE(ulp_submode) | V_TX_URG(0) | V_TX_SHOVE(shove)); 594 txwr->plen = htobe32(plen); 595 596 if (txalign > 0) { 597 struct tcpcb *tp = intotcpcb(toep->inp); 598 599 if (plen < 2 * tp->t_maxseg || is_10G_port(toep->vi->pi)) 600 txwr->lsodisable_to_flags |= 601 htobe32(F_FW_OFLD_TX_DATA_WR_LSODISABLE); 602 else 603 txwr->lsodisable_to_flags |= 604 htobe32(F_FW_OFLD_TX_DATA_WR_ALIGNPLD | 605 (tp->t_flags & TF_NODELAY ? 0 : 606 F_FW_OFLD_TX_DATA_WR_ALIGNPLDSHOVE)); 607 } 608 } 609 610 /* 611 * Generate a DSGL from a starting mbuf. The total number of segments and the 612 * maximum segments in any one mbuf are provided. 613 */ 614 static void 615 write_tx_sgl(void *dst, struct mbuf *start, struct mbuf *stop, int nsegs, int n) 616 { 617 struct mbuf *m; 618 struct ulptx_sgl *usgl = dst; 619 int i, j, rc; 620 struct sglist sg; 621 struct sglist_seg segs[n]; 622 623 KASSERT(nsegs > 0, ("%s: nsegs 0", __func__)); 624 625 sglist_init(&sg, n, segs); 626 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 627 V_ULPTX_NSGE(nsegs)); 628 629 i = -1; 630 for (m = start; m != stop; m = m->m_next) { 631 if (IS_AIOTX_MBUF(m)) 632 rc = sglist_append_vmpages(&sg, aiotx_mbuf_pages(m), 633 aiotx_mbuf_pgoff(m), m->m_len); 634 else 635 rc = sglist_append(&sg, mtod(m, void *), m->m_len); 636 if (__predict_false(rc != 0)) 637 panic("%s: sglist_append %d", __func__, rc); 638 639 for (j = 0; j < sg.sg_nseg; i++, j++) { 640 if (i < 0) { 641 usgl->len0 = htobe32(segs[j].ss_len); 642 usgl->addr0 = htobe64(segs[j].ss_paddr); 643 } else { 644 usgl->sge[i / 2].len[i & 1] = 645 htobe32(segs[j].ss_len); 646 usgl->sge[i / 2].addr[i & 1] = 647 htobe64(segs[j].ss_paddr); 648 } 649 #ifdef INVARIANTS 650 nsegs--; 651 #endif 652 } 653 sglist_reset(&sg); 654 } 655 if (i & 1) 656 usgl->sge[i / 2].len[1] = htobe32(0); 657 KASSERT(nsegs == 0, ("%s: nsegs %d, start %p, stop %p", 658 __func__, nsegs, start, stop)); 659 } 660 661 /* 662 * Max number of SGL entries an offload tx work request can have. This is 41 663 * (1 + 40) for a full 512B work request. 664 * fw_ofld_tx_data_wr(16B) + ulptx_sgl(16B, 1) + ulptx_sge_pair(480B, 40) 665 */ 666 #define OFLD_SGL_LEN (41) 667 668 /* 669 * Send data and/or a FIN to the peer. 670 * 671 * The socket's so_snd buffer consists of a stream of data starting with sb_mb 672 * and linked together with m_next. sb_sndptr, if set, is the last mbuf that 673 * was transmitted. 674 * 675 * drop indicates the number of bytes that should be dropped from the head of 676 * the send buffer. It is an optimization that lets do_fw4_ack avoid creating 677 * contention on the send buffer lock (before this change it used to do 678 * sowwakeup and then t4_push_frames right after that when recovering from tx 679 * stalls). When drop is set this function MUST drop the bytes and wake up any 680 * writers. 681 */ 682 void 683 t4_push_frames(struct adapter *sc, struct toepcb *toep, int drop) 684 { 685 struct mbuf *sndptr, *m, *sb_sndptr; 686 struct fw_ofld_tx_data_wr *txwr; 687 struct wrqe *wr; 688 u_int plen, nsegs, credits, max_imm, max_nsegs, max_nsegs_1mbuf; 689 struct inpcb *inp = toep->inp; 690 struct tcpcb *tp = intotcpcb(inp); 691 struct socket *so = inp->inp_socket; 692 struct sockbuf *sb = &so->so_snd; 693 int tx_credits, shove, compl, sowwakeup; 694 struct ofld_tx_sdesc *txsd; 695 bool aiotx_mbuf_seen; 696 697 INP_WLOCK_ASSERT(inp); 698 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 699 ("%s: flowc_wr not sent for tid %u.", __func__, toep->tid)); 700 701 KASSERT(toep->ulp_mode == ULP_MODE_NONE || 702 toep->ulp_mode == ULP_MODE_TCPDDP || 703 toep->ulp_mode == ULP_MODE_RDMA, 704 ("%s: ulp_mode %u for toep %p", __func__, toep->ulp_mode, toep)); 705 706 #ifdef VERBOSE_TRACES 707 CTR4(KTR_CXGBE, "%s: tid %d toep flags %#x tp flags %#x drop %d", 708 __func__, toep->tid, toep->flags, tp->t_flags); 709 #endif 710 if (__predict_false(toep->flags & TPF_ABORT_SHUTDOWN)) 711 return; 712 713 #ifdef RATELIMIT 714 if (__predict_false(inp->inp_flags2 & INP_RATE_LIMIT_CHANGED) && 715 (update_tx_rate_limit(sc, toep, so->so_max_pacing_rate) == 0)) { 716 inp->inp_flags2 &= ~INP_RATE_LIMIT_CHANGED; 717 } 718 #endif 719 720 /* 721 * This function doesn't resume by itself. Someone else must clear the 722 * flag and call this function. 723 */ 724 if (__predict_false(toep->flags & TPF_TX_SUSPENDED)) { 725 KASSERT(drop == 0, 726 ("%s: drop (%d) != 0 but tx is suspended", __func__, drop)); 727 return; 728 } 729 730 txsd = &toep->txsd[toep->txsd_pidx]; 731 do { 732 tx_credits = min(toep->tx_credits, MAX_OFLD_TX_CREDITS); 733 max_imm = max_imm_payload(tx_credits); 734 max_nsegs = max_dsgl_nsegs(tx_credits); 735 736 SOCKBUF_LOCK(sb); 737 sowwakeup = drop; 738 if (drop) { 739 sbdrop_locked(sb, drop); 740 drop = 0; 741 } 742 sb_sndptr = sb->sb_sndptr; 743 sndptr = sb_sndptr ? sb_sndptr->m_next : sb->sb_mb; 744 plen = 0; 745 nsegs = 0; 746 max_nsegs_1mbuf = 0; /* max # of SGL segments in any one mbuf */ 747 aiotx_mbuf_seen = false; 748 for (m = sndptr; m != NULL; m = m->m_next) { 749 int n; 750 751 if (IS_AIOTX_MBUF(m)) 752 n = sglist_count_vmpages(aiotx_mbuf_pages(m), 753 aiotx_mbuf_pgoff(m), m->m_len); 754 else 755 n = sglist_count(mtod(m, void *), m->m_len); 756 757 nsegs += n; 758 plen += m->m_len; 759 760 /* This mbuf sent us _over_ the nsegs limit, back out */ 761 if (plen > max_imm && nsegs > max_nsegs) { 762 nsegs -= n; 763 plen -= m->m_len; 764 if (plen == 0) { 765 /* Too few credits */ 766 toep->flags |= TPF_TX_SUSPENDED; 767 if (sowwakeup) { 768 if (!TAILQ_EMPTY( 769 &toep->aiotx_jobq)) 770 t4_aiotx_queue_toep( 771 toep); 772 sowwakeup_locked(so); 773 } else 774 SOCKBUF_UNLOCK(sb); 775 SOCKBUF_UNLOCK_ASSERT(sb); 776 return; 777 } 778 break; 779 } 780 781 if (IS_AIOTX_MBUF(m)) 782 aiotx_mbuf_seen = true; 783 if (max_nsegs_1mbuf < n) 784 max_nsegs_1mbuf = n; 785 sb_sndptr = m; /* new sb->sb_sndptr if all goes well */ 786 787 /* This mbuf put us right at the max_nsegs limit */ 788 if (plen > max_imm && nsegs == max_nsegs) { 789 m = m->m_next; 790 break; 791 } 792 } 793 794 if (sbused(sb) > sb->sb_hiwat * 5 / 8 && 795 toep->plen_nocompl + plen >= sb->sb_hiwat / 4) 796 compl = 1; 797 else 798 compl = 0; 799 800 if (sb->sb_flags & SB_AUTOSIZE && 801 V_tcp_do_autosndbuf && 802 sb->sb_hiwat < V_tcp_autosndbuf_max && 803 sbused(sb) >= sb->sb_hiwat * 7 / 8) { 804 int newsize = min(sb->sb_hiwat + V_tcp_autosndbuf_inc, 805 V_tcp_autosndbuf_max); 806 807 if (!sbreserve_locked(sb, newsize, so, NULL)) 808 sb->sb_flags &= ~SB_AUTOSIZE; 809 else 810 sowwakeup = 1; /* room available */ 811 } 812 if (sowwakeup) { 813 if (!TAILQ_EMPTY(&toep->aiotx_jobq)) 814 t4_aiotx_queue_toep(toep); 815 sowwakeup_locked(so); 816 } else 817 SOCKBUF_UNLOCK(sb); 818 SOCKBUF_UNLOCK_ASSERT(sb); 819 820 /* nothing to send */ 821 if (plen == 0) { 822 KASSERT(m == NULL, 823 ("%s: nothing to send, but m != NULL", __func__)); 824 break; 825 } 826 827 if (__predict_false(toep->flags & TPF_FIN_SENT)) 828 panic("%s: excess tx.", __func__); 829 830 shove = m == NULL && !(tp->t_flags & TF_MORETOCOME); 831 if (plen <= max_imm && !aiotx_mbuf_seen) { 832 833 /* Immediate data tx */ 834 835 wr = alloc_wrqe(roundup2(sizeof(*txwr) + plen, 16), 836 toep->ofld_txq); 837 if (wr == NULL) { 838 /* XXX: how will we recover from this? */ 839 toep->flags |= TPF_TX_SUSPENDED; 840 return; 841 } 842 txwr = wrtod(wr); 843 credits = howmany(wr->wr_len, 16); 844 write_tx_wr(txwr, toep, plen, plen, credits, shove, 0, 845 sc->tt.tx_align); 846 m_copydata(sndptr, 0, plen, (void *)(txwr + 1)); 847 nsegs = 0; 848 } else { 849 int wr_len; 850 851 /* DSGL tx */ 852 853 wr_len = sizeof(*txwr) + sizeof(struct ulptx_sgl) + 854 ((3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1)) * 8; 855 wr = alloc_wrqe(roundup2(wr_len, 16), toep->ofld_txq); 856 if (wr == NULL) { 857 /* XXX: how will we recover from this? */ 858 toep->flags |= TPF_TX_SUSPENDED; 859 return; 860 } 861 txwr = wrtod(wr); 862 credits = howmany(wr_len, 16); 863 write_tx_wr(txwr, toep, 0, plen, credits, shove, 0, 864 sc->tt.tx_align); 865 write_tx_sgl(txwr + 1, sndptr, m, nsegs, 866 max_nsegs_1mbuf); 867 if (wr_len & 0xf) { 868 uint64_t *pad = (uint64_t *) 869 ((uintptr_t)txwr + wr_len); 870 *pad = 0; 871 } 872 } 873 874 KASSERT(toep->tx_credits >= credits, 875 ("%s: not enough credits", __func__)); 876 877 toep->tx_credits -= credits; 878 toep->tx_nocompl += credits; 879 toep->plen_nocompl += plen; 880 if (toep->tx_credits <= toep->tx_total * 3 / 8 && 881 toep->tx_nocompl >= toep->tx_total / 4) 882 compl = 1; 883 884 if (compl || toep->ulp_mode == ULP_MODE_RDMA) { 885 txwr->op_to_immdlen |= htobe32(F_FW_WR_COMPL); 886 toep->tx_nocompl = 0; 887 toep->plen_nocompl = 0; 888 } 889 890 tp->snd_nxt += plen; 891 tp->snd_max += plen; 892 893 SOCKBUF_LOCK(sb); 894 KASSERT(sb_sndptr, ("%s: sb_sndptr is NULL", __func__)); 895 sb->sb_sndptr = sb_sndptr; 896 SOCKBUF_UNLOCK(sb); 897 898 toep->flags |= TPF_TX_DATA_SENT; 899 if (toep->tx_credits < MIN_OFLD_TX_CREDITS) 900 toep->flags |= TPF_TX_SUSPENDED; 901 902 KASSERT(toep->txsd_avail > 0, ("%s: no txsd", __func__)); 903 txsd->plen = plen; 904 txsd->tx_credits = credits; 905 txsd++; 906 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) { 907 toep->txsd_pidx = 0; 908 txsd = &toep->txsd[0]; 909 } 910 toep->txsd_avail--; 911 912 t4_l2t_send(sc, wr, toep->l2te); 913 } while (m != NULL); 914 915 /* Send a FIN if requested, but only if there's no more data to send */ 916 if (m == NULL && toep->flags & TPF_SEND_FIN) 917 close_conn(sc, toep); 918 } 919 920 static inline void 921 rqdrop_locked(struct mbufq *q, int plen) 922 { 923 struct mbuf *m; 924 925 while (plen > 0) { 926 m = mbufq_dequeue(q); 927 928 /* Too many credits. */ 929 MPASS(m != NULL); 930 M_ASSERTPKTHDR(m); 931 932 /* Partial credits. */ 933 MPASS(plen >= m->m_pkthdr.len); 934 935 plen -= m->m_pkthdr.len; 936 m_freem(m); 937 } 938 } 939 940 void 941 t4_push_pdus(struct adapter *sc, struct toepcb *toep, int drop) 942 { 943 struct mbuf *sndptr, *m; 944 struct fw_ofld_tx_data_wr *txwr; 945 struct wrqe *wr; 946 u_int plen, nsegs, credits, max_imm, max_nsegs, max_nsegs_1mbuf; 947 u_int adjusted_plen, ulp_submode; 948 struct inpcb *inp = toep->inp; 949 struct tcpcb *tp = intotcpcb(inp); 950 int tx_credits, shove; 951 struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; 952 struct mbufq *pduq = &toep->ulp_pduq; 953 static const u_int ulp_extra_len[] = {0, 4, 4, 8}; 954 955 INP_WLOCK_ASSERT(inp); 956 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 957 ("%s: flowc_wr not sent for tid %u.", __func__, toep->tid)); 958 KASSERT(toep->ulp_mode == ULP_MODE_ISCSI, 959 ("%s: ulp_mode %u for toep %p", __func__, toep->ulp_mode, toep)); 960 961 if (__predict_false(toep->flags & TPF_ABORT_SHUTDOWN)) 962 return; 963 964 /* 965 * This function doesn't resume by itself. Someone else must clear the 966 * flag and call this function. 967 */ 968 if (__predict_false(toep->flags & TPF_TX_SUSPENDED)) { 969 KASSERT(drop == 0, 970 ("%s: drop (%d) != 0 but tx is suspended", __func__, drop)); 971 return; 972 } 973 974 if (drop) 975 rqdrop_locked(&toep->ulp_pdu_reclaimq, drop); 976 977 while ((sndptr = mbufq_first(pduq)) != NULL) { 978 M_ASSERTPKTHDR(sndptr); 979 980 tx_credits = min(toep->tx_credits, MAX_OFLD_TX_CREDITS); 981 max_imm = max_imm_payload(tx_credits); 982 max_nsegs = max_dsgl_nsegs(tx_credits); 983 984 plen = 0; 985 nsegs = 0; 986 max_nsegs_1mbuf = 0; /* max # of SGL segments in any one mbuf */ 987 for (m = sndptr; m != NULL; m = m->m_next) { 988 int n = sglist_count(mtod(m, void *), m->m_len); 989 990 nsegs += n; 991 plen += m->m_len; 992 993 /* 994 * This mbuf would send us _over_ the nsegs limit. 995 * Suspend tx because the PDU can't be sent out. 996 */ 997 if (plen > max_imm && nsegs > max_nsegs) { 998 toep->flags |= TPF_TX_SUSPENDED; 999 return; 1000 } 1001 1002 if (max_nsegs_1mbuf < n) 1003 max_nsegs_1mbuf = n; 1004 } 1005 1006 if (__predict_false(toep->flags & TPF_FIN_SENT)) 1007 panic("%s: excess tx.", __func__); 1008 1009 /* 1010 * We have a PDU to send. All of it goes out in one WR so 'm' 1011 * is NULL. A PDU's length is always a multiple of 4. 1012 */ 1013 MPASS(m == NULL); 1014 MPASS((plen & 3) == 0); 1015 MPASS(sndptr->m_pkthdr.len == plen); 1016 1017 shove = !(tp->t_flags & TF_MORETOCOME); 1018 ulp_submode = mbuf_ulp_submode(sndptr); 1019 MPASS(ulp_submode < nitems(ulp_extra_len)); 1020 1021 /* 1022 * plen doesn't include header and data digests, which are 1023 * generated and inserted in the right places by the TOE, but 1024 * they do occupy TCP sequence space and need to be accounted 1025 * for. 1026 */ 1027 adjusted_plen = plen + ulp_extra_len[ulp_submode]; 1028 if (plen <= max_imm) { 1029 1030 /* Immediate data tx */ 1031 1032 wr = alloc_wrqe(roundup2(sizeof(*txwr) + plen, 16), 1033 toep->ofld_txq); 1034 if (wr == NULL) { 1035 /* XXX: how will we recover from this? */ 1036 toep->flags |= TPF_TX_SUSPENDED; 1037 return; 1038 } 1039 txwr = wrtod(wr); 1040 credits = howmany(wr->wr_len, 16); 1041 write_tx_wr(txwr, toep, plen, adjusted_plen, credits, 1042 shove, ulp_submode, sc->tt.tx_align); 1043 m_copydata(sndptr, 0, plen, (void *)(txwr + 1)); 1044 nsegs = 0; 1045 } else { 1046 int wr_len; 1047 1048 /* DSGL tx */ 1049 wr_len = sizeof(*txwr) + sizeof(struct ulptx_sgl) + 1050 ((3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1)) * 8; 1051 wr = alloc_wrqe(roundup2(wr_len, 16), toep->ofld_txq); 1052 if (wr == NULL) { 1053 /* XXX: how will we recover from this? */ 1054 toep->flags |= TPF_TX_SUSPENDED; 1055 return; 1056 } 1057 txwr = wrtod(wr); 1058 credits = howmany(wr_len, 16); 1059 write_tx_wr(txwr, toep, 0, adjusted_plen, credits, 1060 shove, ulp_submode, sc->tt.tx_align); 1061 write_tx_sgl(txwr + 1, sndptr, m, nsegs, 1062 max_nsegs_1mbuf); 1063 if (wr_len & 0xf) { 1064 uint64_t *pad = (uint64_t *) 1065 ((uintptr_t)txwr + wr_len); 1066 *pad = 0; 1067 } 1068 } 1069 1070 KASSERT(toep->tx_credits >= credits, 1071 ("%s: not enough credits", __func__)); 1072 1073 m = mbufq_dequeue(pduq); 1074 MPASS(m == sndptr); 1075 mbufq_enqueue(&toep->ulp_pdu_reclaimq, m); 1076 1077 toep->tx_credits -= credits; 1078 toep->tx_nocompl += credits; 1079 toep->plen_nocompl += plen; 1080 if (toep->tx_credits <= toep->tx_total * 3 / 8 && 1081 toep->tx_nocompl >= toep->tx_total / 4) { 1082 txwr->op_to_immdlen |= htobe32(F_FW_WR_COMPL); 1083 toep->tx_nocompl = 0; 1084 toep->plen_nocompl = 0; 1085 } 1086 1087 tp->snd_nxt += adjusted_plen; 1088 tp->snd_max += adjusted_plen; 1089 1090 toep->flags |= TPF_TX_DATA_SENT; 1091 if (toep->tx_credits < MIN_OFLD_TX_CREDITS) 1092 toep->flags |= TPF_TX_SUSPENDED; 1093 1094 KASSERT(toep->txsd_avail > 0, ("%s: no txsd", __func__)); 1095 txsd->plen = plen; 1096 txsd->tx_credits = credits; 1097 txsd++; 1098 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) { 1099 toep->txsd_pidx = 0; 1100 txsd = &toep->txsd[0]; 1101 } 1102 toep->txsd_avail--; 1103 1104 t4_l2t_send(sc, wr, toep->l2te); 1105 } 1106 1107 /* Send a FIN if requested, but only if there are no more PDUs to send */ 1108 if (mbufq_first(pduq) == NULL && toep->flags & TPF_SEND_FIN) 1109 close_conn(sc, toep); 1110 } 1111 1112 int 1113 t4_tod_output(struct toedev *tod, struct tcpcb *tp) 1114 { 1115 struct adapter *sc = tod->tod_softc; 1116 #ifdef INVARIANTS 1117 struct inpcb *inp = tp->t_inpcb; 1118 #endif 1119 struct toepcb *toep = tp->t_toe; 1120 1121 INP_WLOCK_ASSERT(inp); 1122 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1123 ("%s: inp %p dropped.", __func__, inp)); 1124 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 1125 1126 if (toep->ulp_mode == ULP_MODE_ISCSI) 1127 t4_push_pdus(sc, toep, 0); 1128 else 1129 t4_push_frames(sc, toep, 0); 1130 1131 return (0); 1132 } 1133 1134 int 1135 t4_send_fin(struct toedev *tod, struct tcpcb *tp) 1136 { 1137 struct adapter *sc = tod->tod_softc; 1138 #ifdef INVARIANTS 1139 struct inpcb *inp = tp->t_inpcb; 1140 #endif 1141 struct toepcb *toep = tp->t_toe; 1142 1143 INP_WLOCK_ASSERT(inp); 1144 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1145 ("%s: inp %p dropped.", __func__, inp)); 1146 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 1147 1148 toep->flags |= TPF_SEND_FIN; 1149 if (tp->t_state >= TCPS_ESTABLISHED) { 1150 if (toep->ulp_mode == ULP_MODE_ISCSI) 1151 t4_push_pdus(sc, toep, 0); 1152 else 1153 t4_push_frames(sc, toep, 0); 1154 } 1155 1156 return (0); 1157 } 1158 1159 int 1160 t4_send_rst(struct toedev *tod, struct tcpcb *tp) 1161 { 1162 struct adapter *sc = tod->tod_softc; 1163 #if defined(INVARIANTS) 1164 struct inpcb *inp = tp->t_inpcb; 1165 #endif 1166 struct toepcb *toep = tp->t_toe; 1167 1168 INP_WLOCK_ASSERT(inp); 1169 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1170 ("%s: inp %p dropped.", __func__, inp)); 1171 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 1172 1173 /* hmmmm */ 1174 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 1175 ("%s: flowc for tid %u [%s] not sent already", 1176 __func__, toep->tid, tcpstates[tp->t_state])); 1177 1178 send_reset(sc, toep, 0); 1179 return (0); 1180 } 1181 1182 /* 1183 * Peer has sent us a FIN. 1184 */ 1185 static int 1186 do_peer_close(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1187 { 1188 struct adapter *sc = iq->adapter; 1189 const struct cpl_peer_close *cpl = (const void *)(rss + 1); 1190 unsigned int tid = GET_TID(cpl); 1191 struct toepcb *toep = lookup_tid(sc, tid); 1192 struct inpcb *inp = toep->inp; 1193 struct tcpcb *tp = NULL; 1194 struct socket *so; 1195 #ifdef INVARIANTS 1196 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1197 #endif 1198 1199 KASSERT(opcode == CPL_PEER_CLOSE, 1200 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1201 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1202 1203 if (__predict_false(toep->flags & TPF_SYNQE)) { 1204 #ifdef INVARIANTS 1205 struct synq_entry *synqe = (void *)toep; 1206 1207 INP_WLOCK(synqe->lctx->inp); 1208 if (synqe->flags & TPF_SYNQE_HAS_L2TE) { 1209 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 1210 ("%s: listen socket closed but tid %u not aborted.", 1211 __func__, tid)); 1212 } else { 1213 /* 1214 * do_pass_accept_req is still running and will 1215 * eventually take care of this tid. 1216 */ 1217 } 1218 INP_WUNLOCK(synqe->lctx->inp); 1219 #endif 1220 CTR4(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x)", __func__, tid, 1221 toep, toep->flags); 1222 return (0); 1223 } 1224 1225 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1226 1227 CURVNET_SET(toep->vnet); 1228 INP_INFO_RLOCK(&V_tcbinfo); 1229 INP_WLOCK(inp); 1230 tp = intotcpcb(inp); 1231 1232 CTR5(KTR_CXGBE, "%s: tid %u (%s), toep_flags 0x%x, inp %p", __func__, 1233 tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags, inp); 1234 1235 if (toep->flags & TPF_ABORT_SHUTDOWN) 1236 goto done; 1237 1238 tp->rcv_nxt++; /* FIN */ 1239 1240 so = inp->inp_socket; 1241 if (toep->ulp_mode == ULP_MODE_TCPDDP) { 1242 DDP_LOCK(toep); 1243 if (__predict_false(toep->ddp_flags & 1244 (DDP_BUF0_ACTIVE | DDP_BUF1_ACTIVE))) 1245 handle_ddp_close(toep, tp, cpl->rcv_nxt); 1246 DDP_UNLOCK(toep); 1247 } 1248 socantrcvmore(so); 1249 1250 if (toep->ulp_mode != ULP_MODE_RDMA) { 1251 KASSERT(tp->rcv_nxt == be32toh(cpl->rcv_nxt), 1252 ("%s: rcv_nxt mismatch: %u %u", __func__, tp->rcv_nxt, 1253 be32toh(cpl->rcv_nxt))); 1254 } 1255 1256 switch (tp->t_state) { 1257 case TCPS_SYN_RECEIVED: 1258 tp->t_starttime = ticks; 1259 /* FALLTHROUGH */ 1260 1261 case TCPS_ESTABLISHED: 1262 tp->t_state = TCPS_CLOSE_WAIT; 1263 break; 1264 1265 case TCPS_FIN_WAIT_1: 1266 tp->t_state = TCPS_CLOSING; 1267 break; 1268 1269 case TCPS_FIN_WAIT_2: 1270 tcp_twstart(tp); 1271 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */ 1272 INP_INFO_RUNLOCK(&V_tcbinfo); 1273 CURVNET_RESTORE(); 1274 1275 INP_WLOCK(inp); 1276 final_cpl_received(toep); 1277 return (0); 1278 1279 default: 1280 log(LOG_ERR, "%s: TID %u received CPL_PEER_CLOSE in state %d\n", 1281 __func__, tid, tp->t_state); 1282 } 1283 done: 1284 INP_WUNLOCK(inp); 1285 INP_INFO_RUNLOCK(&V_tcbinfo); 1286 CURVNET_RESTORE(); 1287 return (0); 1288 } 1289 1290 /* 1291 * Peer has ACK'd our FIN. 1292 */ 1293 static int 1294 do_close_con_rpl(struct sge_iq *iq, const struct rss_header *rss, 1295 struct mbuf *m) 1296 { 1297 struct adapter *sc = iq->adapter; 1298 const struct cpl_close_con_rpl *cpl = (const void *)(rss + 1); 1299 unsigned int tid = GET_TID(cpl); 1300 struct toepcb *toep = lookup_tid(sc, tid); 1301 struct inpcb *inp = toep->inp; 1302 struct tcpcb *tp = NULL; 1303 struct socket *so = NULL; 1304 #ifdef INVARIANTS 1305 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1306 #endif 1307 1308 KASSERT(opcode == CPL_CLOSE_CON_RPL, 1309 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1310 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1311 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1312 1313 CURVNET_SET(toep->vnet); 1314 INP_INFO_RLOCK(&V_tcbinfo); 1315 INP_WLOCK(inp); 1316 tp = intotcpcb(inp); 1317 1318 CTR4(KTR_CXGBE, "%s: tid %u (%s), toep_flags 0x%x", 1319 __func__, tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags); 1320 1321 if (toep->flags & TPF_ABORT_SHUTDOWN) 1322 goto done; 1323 1324 so = inp->inp_socket; 1325 tp->snd_una = be32toh(cpl->snd_nxt) - 1; /* exclude FIN */ 1326 1327 switch (tp->t_state) { 1328 case TCPS_CLOSING: /* see TCPS_FIN_WAIT_2 in do_peer_close too */ 1329 tcp_twstart(tp); 1330 release: 1331 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */ 1332 INP_INFO_RUNLOCK(&V_tcbinfo); 1333 CURVNET_RESTORE(); 1334 1335 INP_WLOCK(inp); 1336 final_cpl_received(toep); /* no more CPLs expected */ 1337 1338 return (0); 1339 case TCPS_LAST_ACK: 1340 if (tcp_close(tp)) 1341 INP_WUNLOCK(inp); 1342 goto release; 1343 1344 case TCPS_FIN_WAIT_1: 1345 if (so->so_rcv.sb_state & SBS_CANTRCVMORE) 1346 soisdisconnected(so); 1347 tp->t_state = TCPS_FIN_WAIT_2; 1348 break; 1349 1350 default: 1351 log(LOG_ERR, 1352 "%s: TID %u received CPL_CLOSE_CON_RPL in state %s\n", 1353 __func__, tid, tcpstates[tp->t_state]); 1354 } 1355 done: 1356 INP_WUNLOCK(inp); 1357 INP_INFO_RUNLOCK(&V_tcbinfo); 1358 CURVNET_RESTORE(); 1359 return (0); 1360 } 1361 1362 void 1363 send_abort_rpl(struct adapter *sc, struct sge_wrq *ofld_txq, int tid, 1364 int rst_status) 1365 { 1366 struct wrqe *wr; 1367 struct cpl_abort_rpl *cpl; 1368 1369 wr = alloc_wrqe(sizeof(*cpl), ofld_txq); 1370 if (wr == NULL) { 1371 /* XXX */ 1372 panic("%s: allocation failure.", __func__); 1373 } 1374 cpl = wrtod(wr); 1375 1376 INIT_TP_WR_MIT_CPL(cpl, CPL_ABORT_RPL, tid); 1377 cpl->cmd = rst_status; 1378 1379 t4_wrq_tx(sc, wr); 1380 } 1381 1382 static int 1383 abort_status_to_errno(struct tcpcb *tp, unsigned int abort_reason) 1384 { 1385 switch (abort_reason) { 1386 case CPL_ERR_BAD_SYN: 1387 case CPL_ERR_CONN_RESET: 1388 return (tp->t_state == TCPS_CLOSE_WAIT ? EPIPE : ECONNRESET); 1389 case CPL_ERR_XMIT_TIMEDOUT: 1390 case CPL_ERR_PERSIST_TIMEDOUT: 1391 case CPL_ERR_FINWAIT2_TIMEDOUT: 1392 case CPL_ERR_KEEPALIVE_TIMEDOUT: 1393 return (ETIMEDOUT); 1394 default: 1395 return (EIO); 1396 } 1397 } 1398 1399 /* 1400 * TCP RST from the peer, timeout, or some other such critical error. 1401 */ 1402 static int 1403 do_abort_req(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1404 { 1405 struct adapter *sc = iq->adapter; 1406 const struct cpl_abort_req_rss *cpl = (const void *)(rss + 1); 1407 unsigned int tid = GET_TID(cpl); 1408 struct toepcb *toep = lookup_tid(sc, tid); 1409 struct sge_wrq *ofld_txq = toep->ofld_txq; 1410 struct inpcb *inp; 1411 struct tcpcb *tp; 1412 #ifdef INVARIANTS 1413 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1414 #endif 1415 1416 KASSERT(opcode == CPL_ABORT_REQ_RSS, 1417 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1418 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1419 1420 if (toep->flags & TPF_SYNQE) 1421 return (do_abort_req_synqe(iq, rss, m)); 1422 1423 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1424 1425 if (negative_advice(cpl->status)) { 1426 CTR4(KTR_CXGBE, "%s: negative advice %d for tid %d (0x%x)", 1427 __func__, cpl->status, tid, toep->flags); 1428 return (0); /* Ignore negative advice */ 1429 } 1430 1431 inp = toep->inp; 1432 CURVNET_SET(toep->vnet); 1433 INP_INFO_RLOCK(&V_tcbinfo); /* for tcp_close */ 1434 INP_WLOCK(inp); 1435 1436 tp = intotcpcb(inp); 1437 1438 CTR6(KTR_CXGBE, 1439 "%s: tid %d (%s), toep_flags 0x%x, inp_flags 0x%x, status %d", 1440 __func__, tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags, 1441 inp->inp_flags, cpl->status); 1442 1443 /* 1444 * If we'd initiated an abort earlier the reply to it is responsible for 1445 * cleaning up resources. Otherwise we tear everything down right here 1446 * right now. We owe the T4 a CPL_ABORT_RPL no matter what. 1447 */ 1448 if (toep->flags & TPF_ABORT_SHUTDOWN) { 1449 INP_WUNLOCK(inp); 1450 goto done; 1451 } 1452 toep->flags |= TPF_ABORT_SHUTDOWN; 1453 1454 if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) { 1455 struct socket *so = inp->inp_socket; 1456 1457 if (so != NULL) 1458 so_error_set(so, abort_status_to_errno(tp, 1459 cpl->status)); 1460 tp = tcp_close(tp); 1461 if (tp == NULL) 1462 INP_WLOCK(inp); /* re-acquire */ 1463 } 1464 1465 final_cpl_received(toep); 1466 done: 1467 INP_INFO_RUNLOCK(&V_tcbinfo); 1468 CURVNET_RESTORE(); 1469 send_abort_rpl(sc, ofld_txq, tid, CPL_ABORT_NO_RST); 1470 return (0); 1471 } 1472 1473 /* 1474 * Reply to the CPL_ABORT_REQ (send_reset) 1475 */ 1476 static int 1477 do_abort_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1478 { 1479 struct adapter *sc = iq->adapter; 1480 const struct cpl_abort_rpl_rss *cpl = (const void *)(rss + 1); 1481 unsigned int tid = GET_TID(cpl); 1482 struct toepcb *toep = lookup_tid(sc, tid); 1483 struct inpcb *inp = toep->inp; 1484 #ifdef INVARIANTS 1485 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1486 #endif 1487 1488 KASSERT(opcode == CPL_ABORT_RPL_RSS, 1489 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1490 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1491 1492 if (toep->flags & TPF_SYNQE) 1493 return (do_abort_rpl_synqe(iq, rss, m)); 1494 1495 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1496 1497 CTR5(KTR_CXGBE, "%s: tid %u, toep %p, inp %p, status %d", 1498 __func__, tid, toep, inp, cpl->status); 1499 1500 KASSERT(toep->flags & TPF_ABORT_SHUTDOWN, 1501 ("%s: wasn't expecting abort reply", __func__)); 1502 1503 INP_WLOCK(inp); 1504 final_cpl_received(toep); 1505 1506 return (0); 1507 } 1508 1509 static int 1510 do_rx_data(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1511 { 1512 struct adapter *sc = iq->adapter; 1513 const struct cpl_rx_data *cpl = mtod(m, const void *); 1514 unsigned int tid = GET_TID(cpl); 1515 struct toepcb *toep = lookup_tid(sc, tid); 1516 struct inpcb *inp = toep->inp; 1517 struct tcpcb *tp; 1518 struct socket *so; 1519 struct sockbuf *sb; 1520 int len; 1521 uint32_t ddp_placed = 0; 1522 1523 if (__predict_false(toep->flags & TPF_SYNQE)) { 1524 #ifdef INVARIANTS 1525 struct synq_entry *synqe = (void *)toep; 1526 1527 INP_WLOCK(synqe->lctx->inp); 1528 if (synqe->flags & TPF_SYNQE_HAS_L2TE) { 1529 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 1530 ("%s: listen socket closed but tid %u not aborted.", 1531 __func__, tid)); 1532 } else { 1533 /* 1534 * do_pass_accept_req is still running and will 1535 * eventually take care of this tid. 1536 */ 1537 } 1538 INP_WUNLOCK(synqe->lctx->inp); 1539 #endif 1540 CTR4(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x)", __func__, tid, 1541 toep, toep->flags); 1542 m_freem(m); 1543 return (0); 1544 } 1545 1546 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1547 1548 /* strip off CPL header */ 1549 m_adj(m, sizeof(*cpl)); 1550 len = m->m_pkthdr.len; 1551 1552 INP_WLOCK(inp); 1553 if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) { 1554 CTR4(KTR_CXGBE, "%s: tid %u, rx (%d bytes), inp_flags 0x%x", 1555 __func__, tid, len, inp->inp_flags); 1556 INP_WUNLOCK(inp); 1557 m_freem(m); 1558 return (0); 1559 } 1560 1561 tp = intotcpcb(inp); 1562 1563 if (__predict_false(tp->rcv_nxt != be32toh(cpl->seq))) 1564 ddp_placed = be32toh(cpl->seq) - tp->rcv_nxt; 1565 1566 tp->rcv_nxt += len; 1567 if (tp->rcv_wnd < len) { 1568 KASSERT(toep->ulp_mode == ULP_MODE_RDMA, 1569 ("%s: negative window size", __func__)); 1570 } 1571 1572 tp->rcv_wnd -= len; 1573 tp->t_rcvtime = ticks; 1574 1575 if (toep->ulp_mode == ULP_MODE_TCPDDP) 1576 DDP_LOCK(toep); 1577 so = inp_inpcbtosocket(inp); 1578 sb = &so->so_rcv; 1579 SOCKBUF_LOCK(sb); 1580 1581 if (__predict_false(sb->sb_state & SBS_CANTRCVMORE)) { 1582 CTR3(KTR_CXGBE, "%s: tid %u, excess rx (%d bytes)", 1583 __func__, tid, len); 1584 m_freem(m); 1585 SOCKBUF_UNLOCK(sb); 1586 if (toep->ulp_mode == ULP_MODE_TCPDDP) 1587 DDP_UNLOCK(toep); 1588 INP_WUNLOCK(inp); 1589 1590 CURVNET_SET(toep->vnet); 1591 INP_INFO_RLOCK(&V_tcbinfo); 1592 INP_WLOCK(inp); 1593 tp = tcp_drop(tp, ECONNRESET); 1594 if (tp) 1595 INP_WUNLOCK(inp); 1596 INP_INFO_RUNLOCK(&V_tcbinfo); 1597 CURVNET_RESTORE(); 1598 1599 return (0); 1600 } 1601 1602 /* receive buffer autosize */ 1603 MPASS(toep->vnet == so->so_vnet); 1604 CURVNET_SET(toep->vnet); 1605 if (sb->sb_flags & SB_AUTOSIZE && 1606 V_tcp_do_autorcvbuf && 1607 sb->sb_hiwat < V_tcp_autorcvbuf_max && 1608 len > (sbspace(sb) / 8 * 7)) { 1609 unsigned int hiwat = sb->sb_hiwat; 1610 unsigned int newsize = min(hiwat + V_tcp_autorcvbuf_inc, 1611 V_tcp_autorcvbuf_max); 1612 1613 if (!sbreserve_locked(sb, newsize, so, NULL)) 1614 sb->sb_flags &= ~SB_AUTOSIZE; 1615 else 1616 toep->rx_credits += newsize - hiwat; 1617 } 1618 1619 if (toep->ddp_waiting_count != 0 || toep->ddp_active_count != 0) 1620 CTR3(KTR_CXGBE, "%s: tid %u, non-ddp rx (%d bytes)", __func__, 1621 tid, len); 1622 1623 if (toep->ulp_mode == ULP_MODE_TCPDDP) { 1624 int changed = !(toep->ddp_flags & DDP_ON) ^ cpl->ddp_off; 1625 1626 if (changed) { 1627 if (toep->ddp_flags & DDP_SC_REQ) 1628 toep->ddp_flags ^= DDP_ON | DDP_SC_REQ; 1629 else { 1630 KASSERT(cpl->ddp_off == 1, 1631 ("%s: DDP switched on by itself.", 1632 __func__)); 1633 1634 /* Fell out of DDP mode */ 1635 toep->ddp_flags &= ~DDP_ON; 1636 CTR1(KTR_CXGBE, "%s: fell out of DDP mode", 1637 __func__); 1638 1639 insert_ddp_data(toep, ddp_placed); 1640 } 1641 } 1642 1643 if (toep->ddp_flags & DDP_ON) { 1644 /* 1645 * CPL_RX_DATA with DDP on can only be an indicate. 1646 * Start posting queued AIO requests via DDP. The 1647 * payload that arrived in this indicate is appended 1648 * to the socket buffer as usual. 1649 */ 1650 handle_ddp_indicate(toep); 1651 } 1652 } 1653 1654 KASSERT(toep->sb_cc >= sbused(sb), 1655 ("%s: sb %p has more data (%d) than last time (%d).", 1656 __func__, sb, sbused(sb), toep->sb_cc)); 1657 toep->rx_credits += toep->sb_cc - sbused(sb); 1658 sbappendstream_locked(sb, m, 0); 1659 toep->sb_cc = sbused(sb); 1660 if (toep->rx_credits > 0 && toep->sb_cc + tp->rcv_wnd < sb->sb_lowat) { 1661 int credits; 1662 1663 credits = send_rx_credits(sc, toep, toep->rx_credits); 1664 toep->rx_credits -= credits; 1665 tp->rcv_wnd += credits; 1666 tp->rcv_adv += credits; 1667 } 1668 1669 if (toep->ddp_waiting_count > 0 && sbavail(sb) != 0) { 1670 CTR2(KTR_CXGBE, "%s: tid %u queueing AIO task", __func__, 1671 tid); 1672 ddp_queue_toep(toep); 1673 } 1674 sorwakeup_locked(so); 1675 SOCKBUF_UNLOCK_ASSERT(sb); 1676 if (toep->ulp_mode == ULP_MODE_TCPDDP) 1677 DDP_UNLOCK(toep); 1678 1679 INP_WUNLOCK(inp); 1680 CURVNET_RESTORE(); 1681 return (0); 1682 } 1683 1684 #define S_CPL_FW4_ACK_OPCODE 24 1685 #define M_CPL_FW4_ACK_OPCODE 0xff 1686 #define V_CPL_FW4_ACK_OPCODE(x) ((x) << S_CPL_FW4_ACK_OPCODE) 1687 #define G_CPL_FW4_ACK_OPCODE(x) \ 1688 (((x) >> S_CPL_FW4_ACK_OPCODE) & M_CPL_FW4_ACK_OPCODE) 1689 1690 #define S_CPL_FW4_ACK_FLOWID 0 1691 #define M_CPL_FW4_ACK_FLOWID 0xffffff 1692 #define V_CPL_FW4_ACK_FLOWID(x) ((x) << S_CPL_FW4_ACK_FLOWID) 1693 #define G_CPL_FW4_ACK_FLOWID(x) \ 1694 (((x) >> S_CPL_FW4_ACK_FLOWID) & M_CPL_FW4_ACK_FLOWID) 1695 1696 #define S_CPL_FW4_ACK_CR 24 1697 #define M_CPL_FW4_ACK_CR 0xff 1698 #define V_CPL_FW4_ACK_CR(x) ((x) << S_CPL_FW4_ACK_CR) 1699 #define G_CPL_FW4_ACK_CR(x) (((x) >> S_CPL_FW4_ACK_CR) & M_CPL_FW4_ACK_CR) 1700 1701 #define S_CPL_FW4_ACK_SEQVAL 0 1702 #define M_CPL_FW4_ACK_SEQVAL 0x1 1703 #define V_CPL_FW4_ACK_SEQVAL(x) ((x) << S_CPL_FW4_ACK_SEQVAL) 1704 #define G_CPL_FW4_ACK_SEQVAL(x) \ 1705 (((x) >> S_CPL_FW4_ACK_SEQVAL) & M_CPL_FW4_ACK_SEQVAL) 1706 #define F_CPL_FW4_ACK_SEQVAL V_CPL_FW4_ACK_SEQVAL(1U) 1707 1708 static int 1709 do_fw4_ack(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1710 { 1711 struct adapter *sc = iq->adapter; 1712 const struct cpl_fw4_ack *cpl = (const void *)(rss + 1); 1713 unsigned int tid = G_CPL_FW4_ACK_FLOWID(be32toh(OPCODE_TID(cpl))); 1714 struct toepcb *toep = lookup_tid(sc, tid); 1715 struct inpcb *inp; 1716 struct tcpcb *tp; 1717 struct socket *so; 1718 uint8_t credits = cpl->credits; 1719 struct ofld_tx_sdesc *txsd; 1720 int plen; 1721 #ifdef INVARIANTS 1722 unsigned int opcode = G_CPL_FW4_ACK_OPCODE(be32toh(OPCODE_TID(cpl))); 1723 #endif 1724 1725 /* 1726 * Very unusual case: we'd sent a flowc + abort_req for a synq entry and 1727 * now this comes back carrying the credits for the flowc. 1728 */ 1729 if (__predict_false(toep->flags & TPF_SYNQE)) { 1730 KASSERT(toep->flags & TPF_ABORT_SHUTDOWN, 1731 ("%s: credits for a synq entry %p", __func__, toep)); 1732 return (0); 1733 } 1734 1735 inp = toep->inp; 1736 1737 KASSERT(opcode == CPL_FW4_ACK, 1738 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1739 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1740 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1741 1742 INP_WLOCK(inp); 1743 1744 if (__predict_false(toep->flags & TPF_ABORT_SHUTDOWN)) { 1745 INP_WUNLOCK(inp); 1746 return (0); 1747 } 1748 1749 KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0, 1750 ("%s: inp_flags 0x%x", __func__, inp->inp_flags)); 1751 1752 tp = intotcpcb(inp); 1753 1754 if (cpl->flags & CPL_FW4_ACK_FLAGS_SEQVAL) { 1755 tcp_seq snd_una = be32toh(cpl->snd_una); 1756 1757 #ifdef INVARIANTS 1758 if (__predict_false(SEQ_LT(snd_una, tp->snd_una))) { 1759 log(LOG_ERR, 1760 "%s: unexpected seq# %x for TID %u, snd_una %x\n", 1761 __func__, snd_una, toep->tid, tp->snd_una); 1762 } 1763 #endif 1764 1765 if (tp->snd_una != snd_una) { 1766 tp->snd_una = snd_una; 1767 tp->ts_recent_age = tcp_ts_getticks(); 1768 } 1769 } 1770 1771 #ifdef VERBOSE_TRACES 1772 CTR3(KTR_CXGBE, "%s: tid %d credits %u", __func__, tid, credits); 1773 #endif 1774 so = inp->inp_socket; 1775 txsd = &toep->txsd[toep->txsd_cidx]; 1776 plen = 0; 1777 while (credits) { 1778 KASSERT(credits >= txsd->tx_credits, 1779 ("%s: too many (or partial) credits", __func__)); 1780 credits -= txsd->tx_credits; 1781 toep->tx_credits += txsd->tx_credits; 1782 plen += txsd->plen; 1783 txsd++; 1784 toep->txsd_avail++; 1785 KASSERT(toep->txsd_avail <= toep->txsd_total, 1786 ("%s: txsd avail > total", __func__)); 1787 if (__predict_false(++toep->txsd_cidx == toep->txsd_total)) { 1788 txsd = &toep->txsd[0]; 1789 toep->txsd_cidx = 0; 1790 } 1791 } 1792 1793 if (toep->tx_credits == toep->tx_total) { 1794 toep->tx_nocompl = 0; 1795 toep->plen_nocompl = 0; 1796 } 1797 1798 if (toep->flags & TPF_TX_SUSPENDED && 1799 toep->tx_credits >= toep->tx_total / 4) { 1800 #ifdef VERBOSE_TRACES 1801 CTR2(KTR_CXGBE, "%s: tid %d calling t4_push_frames", __func__, 1802 tid); 1803 #endif 1804 toep->flags &= ~TPF_TX_SUSPENDED; 1805 CURVNET_SET(toep->vnet); 1806 if (toep->ulp_mode == ULP_MODE_ISCSI) 1807 t4_push_pdus(sc, toep, plen); 1808 else 1809 t4_push_frames(sc, toep, plen); 1810 CURVNET_RESTORE(); 1811 } else if (plen > 0) { 1812 struct sockbuf *sb = &so->so_snd; 1813 int sbu; 1814 1815 SOCKBUF_LOCK(sb); 1816 sbu = sbused(sb); 1817 if (toep->ulp_mode == ULP_MODE_ISCSI) { 1818 1819 if (__predict_false(sbu > 0)) { 1820 /* 1821 * The data trasmitted before the tid's ULP mode 1822 * changed to ISCSI is still in so_snd. 1823 * Incoming credits should account for so_snd 1824 * first. 1825 */ 1826 sbdrop_locked(sb, min(sbu, plen)); 1827 plen -= min(sbu, plen); 1828 } 1829 sowwakeup_locked(so); /* unlocks so_snd */ 1830 rqdrop_locked(&toep->ulp_pdu_reclaimq, plen); 1831 } else { 1832 #ifdef VERBOSE_TRACES 1833 CTR3(KTR_CXGBE, "%s: tid %d dropped %d bytes", __func__, 1834 tid, plen); 1835 #endif 1836 sbdrop_locked(sb, plen); 1837 if (!TAILQ_EMPTY(&toep->aiotx_jobq)) 1838 t4_aiotx_queue_toep(toep); 1839 sowwakeup_locked(so); /* unlocks so_snd */ 1840 } 1841 SOCKBUF_UNLOCK_ASSERT(sb); 1842 } 1843 1844 INP_WUNLOCK(inp); 1845 1846 return (0); 1847 } 1848 1849 int 1850 do_set_tcb_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1851 { 1852 struct adapter *sc = iq->adapter; 1853 const struct cpl_set_tcb_rpl *cpl = (const void *)(rss + 1); 1854 unsigned int tid = GET_TID(cpl); 1855 struct toepcb *toep; 1856 #ifdef INVARIANTS 1857 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1858 #endif 1859 1860 KASSERT(opcode == CPL_SET_TCB_RPL, 1861 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1862 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1863 MPASS(iq != &sc->sge.fwq); 1864 1865 toep = lookup_tid(sc, tid); 1866 if (toep->ulp_mode == ULP_MODE_TCPDDP) { 1867 handle_ddp_tcb_rpl(toep, cpl); 1868 return (0); 1869 } 1870 1871 /* 1872 * TOM and/or other ULPs don't request replies for CPL_SET_TCB or 1873 * CPL_SET_TCB_FIELD requests. This can easily change and when it does 1874 * the dispatch code will go here. 1875 */ 1876 #ifdef INVARIANTS 1877 panic("%s: Unexpected CPL_SET_TCB_RPL for tid %u on iq %p", __func__, 1878 tid, iq); 1879 #else 1880 log(LOG_ERR, "%s: Unexpected CPL_SET_TCB_RPL for tid %u on iq %p\n", 1881 __func__, tid, iq); 1882 #endif 1883 1884 return (0); 1885 } 1886 1887 void 1888 t4_set_tcb_field(struct adapter *sc, struct sge_wrq *wrq, int tid, 1889 uint16_t word, uint64_t mask, uint64_t val, int reply, int cookie, int iqid) 1890 { 1891 struct wrqe *wr; 1892 struct cpl_set_tcb_field *req; 1893 1894 MPASS((cookie & ~M_COOKIE) == 0); 1895 MPASS((iqid & ~M_QUEUENO) == 0); 1896 1897 wr = alloc_wrqe(sizeof(*req), wrq); 1898 if (wr == NULL) { 1899 /* XXX */ 1900 panic("%s: allocation failure.", __func__); 1901 } 1902 req = wrtod(wr); 1903 1904 INIT_TP_WR_MIT_CPL(req, CPL_SET_TCB_FIELD, tid); 1905 req->reply_ctrl = htobe16(V_QUEUENO(iqid)); 1906 if (reply == 0) 1907 req->reply_ctrl |= htobe16(F_NO_REPLY); 1908 req->word_cookie = htobe16(V_WORD(word) | V_COOKIE(cookie)); 1909 req->mask = htobe64(mask); 1910 req->val = htobe64(val); 1911 1912 t4_wrq_tx(sc, wr); 1913 } 1914 1915 void 1916 t4_init_cpl_io_handlers(void) 1917 { 1918 1919 t4_register_cpl_handler(CPL_PEER_CLOSE, do_peer_close); 1920 t4_register_cpl_handler(CPL_CLOSE_CON_RPL, do_close_con_rpl); 1921 t4_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req); 1922 t4_register_cpl_handler(CPL_ABORT_RPL_RSS, do_abort_rpl); 1923 t4_register_cpl_handler(CPL_RX_DATA, do_rx_data); 1924 t4_register_cpl_handler(CPL_FW4_ACK, do_fw4_ack); 1925 } 1926 1927 void 1928 t4_uninit_cpl_io_handlers(void) 1929 { 1930 1931 t4_register_cpl_handler(CPL_PEER_CLOSE, NULL); 1932 t4_register_cpl_handler(CPL_CLOSE_CON_RPL, NULL); 1933 t4_register_cpl_handler(CPL_ABORT_REQ_RSS, NULL); 1934 t4_register_cpl_handler(CPL_ABORT_RPL_RSS, NULL); 1935 t4_register_cpl_handler(CPL_RX_DATA, NULL); 1936 t4_register_cpl_handler(CPL_FW4_ACK, NULL); 1937 } 1938 1939 /* 1940 * Use the 'backend3' field in AIO jobs to store the amount of data 1941 * sent by the AIO job so far and the 'backend4' field to hold an 1942 * error that should be reported when the job is completed. 1943 */ 1944 #define aio_sent backend3 1945 #define aio_error backend4 1946 1947 #define jobtotid(job) \ 1948 (((struct toepcb *)(so_sototcpcb((job)->fd_file->f_data)->t_toe))->tid) 1949 1950 static void 1951 free_aiotx_buffer(struct aiotx_buffer *ab) 1952 { 1953 struct kaiocb *job; 1954 long status; 1955 int error; 1956 1957 if (refcount_release(&ab->refcount) == 0) 1958 return; 1959 1960 job = ab->job; 1961 error = job->aio_error; 1962 status = job->aio_sent; 1963 vm_page_unhold_pages(ab->ps.pages, ab->ps.npages); 1964 free(ab, M_CXGBE); 1965 #ifdef VERBOSE_TRACES 1966 CTR5(KTR_CXGBE, "%s: tid %d completed %p len %ld, error %d", __func__, 1967 jobtotid(job), job, status, error); 1968 #endif 1969 if (error == ECANCELED && status != 0) 1970 error = 0; 1971 if (error == ECANCELED) 1972 aio_cancel(job); 1973 else if (error) 1974 aio_complete(job, -1, error); 1975 else 1976 aio_complete(job, status, 0); 1977 } 1978 1979 static void 1980 t4_aiotx_mbuf_free(struct mbuf *m, void *buffer, void *arg) 1981 { 1982 struct aiotx_buffer *ab = buffer; 1983 1984 #ifdef VERBOSE_TRACES 1985 CTR3(KTR_CXGBE, "%s: completed %d bytes for tid %d", __func__, 1986 m->m_len, jobtotid(ab->job)); 1987 #endif 1988 free_aiotx_buffer(ab); 1989 } 1990 1991 /* 1992 * Hold the buffer backing an AIO request and return an AIO transmit 1993 * buffer. 1994 */ 1995 static int 1996 hold_aio(struct kaiocb *job) 1997 { 1998 struct aiotx_buffer *ab; 1999 struct vmspace *vm; 2000 vm_map_t map; 2001 vm_offset_t start, end, pgoff; 2002 int n; 2003 2004 MPASS(job->backend1 == NULL); 2005 2006 /* 2007 * The AIO subsystem will cancel and drain all requests before 2008 * permitting a process to exit or exec, so p_vmspace should 2009 * be stable here. 2010 */ 2011 vm = job->userproc->p_vmspace; 2012 map = &vm->vm_map; 2013 start = (uintptr_t)job->uaiocb.aio_buf; 2014 pgoff = start & PAGE_MASK; 2015 end = round_page(start + job->uaiocb.aio_nbytes); 2016 start = trunc_page(start); 2017 n = atop(end - start); 2018 2019 ab = malloc(sizeof(*ab) + n * sizeof(vm_page_t), M_CXGBE, M_WAITOK | 2020 M_ZERO); 2021 refcount_init(&ab->refcount, 1); 2022 ab->ps.pages = (vm_page_t *)(ab + 1); 2023 ab->ps.npages = vm_fault_quick_hold_pages(map, start, end - start, 2024 VM_PROT_WRITE, ab->ps.pages, n); 2025 if (ab->ps.npages < 0) { 2026 free(ab, M_CXGBE); 2027 return (EFAULT); 2028 } 2029 2030 KASSERT(ab->ps.npages == n, 2031 ("hold_aio: page count mismatch: %d vs %d", ab->ps.npages, n)); 2032 2033 ab->ps.offset = pgoff; 2034 ab->ps.len = job->uaiocb.aio_nbytes; 2035 ab->job = job; 2036 job->backend1 = ab; 2037 #ifdef VERBOSE_TRACES 2038 CTR5(KTR_CXGBE, "%s: tid %d, new pageset %p for job %p, npages %d", 2039 __func__, jobtotid(job), &ab->ps, job, ab->ps.npages); 2040 #endif 2041 return (0); 2042 } 2043 2044 static void 2045 t4_aiotx_process_job(struct toepcb *toep, struct socket *so, struct kaiocb *job) 2046 { 2047 struct adapter *sc; 2048 struct sockbuf *sb; 2049 struct file *fp; 2050 struct aiotx_buffer *ab; 2051 struct inpcb *inp; 2052 struct tcpcb *tp; 2053 struct mbuf *m; 2054 int error; 2055 bool moretocome, sendmore; 2056 2057 sc = td_adapter(toep->td); 2058 sb = &so->so_snd; 2059 SOCKBUF_UNLOCK(sb); 2060 fp = job->fd_file; 2061 ab = job->backend1; 2062 m = NULL; 2063 2064 #ifdef MAC 2065 error = mac_socket_check_send(fp->f_cred, so); 2066 if (error != 0) 2067 goto out; 2068 #endif 2069 2070 if (ab == NULL) { 2071 error = hold_aio(job); 2072 if (error != 0) 2073 goto out; 2074 ab = job->backend1; 2075 } 2076 2077 /* Inline sosend_generic(). */ 2078 2079 job->msgsnd = 1; 2080 2081 error = sblock(sb, SBL_WAIT); 2082 MPASS(error == 0); 2083 2084 sendanother: 2085 m = m_get(M_WAITOK, MT_DATA); 2086 2087 SOCKBUF_LOCK(sb); 2088 if (so->so_snd.sb_state & SBS_CANTSENDMORE) { 2089 SOCKBUF_UNLOCK(sb); 2090 sbunlock(sb); 2091 if ((so->so_options & SO_NOSIGPIPE) == 0) { 2092 PROC_LOCK(job->userproc); 2093 kern_psignal(job->userproc, SIGPIPE); 2094 PROC_UNLOCK(job->userproc); 2095 } 2096 error = EPIPE; 2097 goto out; 2098 } 2099 if (so->so_error) { 2100 error = so->so_error; 2101 so->so_error = 0; 2102 SOCKBUF_UNLOCK(sb); 2103 sbunlock(sb); 2104 goto out; 2105 } 2106 if ((so->so_state & SS_ISCONNECTED) == 0) { 2107 SOCKBUF_UNLOCK(sb); 2108 sbunlock(sb); 2109 error = ENOTCONN; 2110 goto out; 2111 } 2112 if (sbspace(sb) < sb->sb_lowat) { 2113 MPASS(job->aio_sent == 0 || !(so->so_state & SS_NBIO)); 2114 2115 /* 2116 * Don't block if there is too little room in the socket 2117 * buffer. Instead, requeue the request. 2118 */ 2119 if (!aio_set_cancel_function(job, t4_aiotx_cancel)) { 2120 SOCKBUF_UNLOCK(sb); 2121 sbunlock(sb); 2122 error = ECANCELED; 2123 goto out; 2124 } 2125 TAILQ_INSERT_HEAD(&toep->aiotx_jobq, job, list); 2126 SOCKBUF_UNLOCK(sb); 2127 sbunlock(sb); 2128 goto out; 2129 } 2130 2131 /* 2132 * Write as much data as the socket permits, but no more than a 2133 * a single sndbuf at a time. 2134 */ 2135 m->m_len = sbspace(sb); 2136 if (m->m_len > ab->ps.len - job->aio_sent) { 2137 m->m_len = ab->ps.len - job->aio_sent; 2138 moretocome = false; 2139 } else 2140 moretocome = true; 2141 if (m->m_len > sc->tt.sndbuf) { 2142 m->m_len = sc->tt.sndbuf; 2143 sendmore = true; 2144 } else 2145 sendmore = false; 2146 2147 if (!TAILQ_EMPTY(&toep->aiotx_jobq)) 2148 moretocome = true; 2149 SOCKBUF_UNLOCK(sb); 2150 MPASS(m->m_len != 0); 2151 2152 /* Inlined tcp_usr_send(). */ 2153 2154 inp = toep->inp; 2155 INP_WLOCK(inp); 2156 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2157 INP_WUNLOCK(inp); 2158 sbunlock(sb); 2159 error = ECONNRESET; 2160 goto out; 2161 } 2162 2163 refcount_acquire(&ab->refcount); 2164 m_extadd(m, NULL, ab->ps.len, t4_aiotx_mbuf_free, ab, 2165 (void *)(uintptr_t)job->aio_sent, 0, EXT_NET_DRV); 2166 m->m_ext.ext_flags |= EXT_FLAG_AIOTX; 2167 job->aio_sent += m->m_len; 2168 2169 sbappendstream(sb, m, 0); 2170 m = NULL; 2171 2172 if (!(inp->inp_flags & INP_DROPPED)) { 2173 tp = intotcpcb(inp); 2174 if (moretocome) 2175 tp->t_flags |= TF_MORETOCOME; 2176 error = tp->t_fb->tfb_tcp_output(tp); 2177 if (moretocome) 2178 tp->t_flags &= ~TF_MORETOCOME; 2179 } 2180 2181 INP_WUNLOCK(inp); 2182 if (sendmore) 2183 goto sendanother; 2184 sbunlock(sb); 2185 2186 if (error) 2187 goto out; 2188 2189 /* 2190 * If this is a non-blocking socket and the request has not 2191 * been fully completed, requeue it until the socket is ready 2192 * again. 2193 */ 2194 if (job->aio_sent < job->uaiocb.aio_nbytes && 2195 !(so->so_state & SS_NBIO)) { 2196 SOCKBUF_LOCK(sb); 2197 if (!aio_set_cancel_function(job, t4_aiotx_cancel)) { 2198 SOCKBUF_UNLOCK(sb); 2199 error = ECANCELED; 2200 goto out; 2201 } 2202 TAILQ_INSERT_HEAD(&toep->aiotx_jobq, job, list); 2203 return; 2204 } 2205 2206 /* 2207 * If the request will not be requeued, drop a reference on 2208 * the aiotx buffer. Any mbufs in flight should still 2209 * contain a reference, but this drops the reference that the 2210 * job owns while it is waiting to queue mbufs to the socket. 2211 */ 2212 free_aiotx_buffer(ab); 2213 2214 out: 2215 if (error) { 2216 if (ab != NULL) { 2217 job->aio_error = error; 2218 free_aiotx_buffer(ab); 2219 } else { 2220 MPASS(job->aio_sent == 0); 2221 aio_complete(job, -1, error); 2222 } 2223 } 2224 if (m != NULL) 2225 m_free(m); 2226 SOCKBUF_LOCK(sb); 2227 } 2228 2229 static void 2230 t4_aiotx_task(void *context, int pending) 2231 { 2232 struct toepcb *toep = context; 2233 struct inpcb *inp = toep->inp; 2234 struct socket *so = inp->inp_socket; 2235 struct kaiocb *job; 2236 2237 CURVNET_SET(toep->vnet); 2238 SOCKBUF_LOCK(&so->so_snd); 2239 while (!TAILQ_EMPTY(&toep->aiotx_jobq) && sowriteable(so)) { 2240 job = TAILQ_FIRST(&toep->aiotx_jobq); 2241 TAILQ_REMOVE(&toep->aiotx_jobq, job, list); 2242 if (!aio_clear_cancel_function(job)) 2243 continue; 2244 2245 t4_aiotx_process_job(toep, so, job); 2246 } 2247 toep->aiotx_task_active = false; 2248 SOCKBUF_UNLOCK(&so->so_snd); 2249 CURVNET_RESTORE(); 2250 2251 free_toepcb(toep); 2252 } 2253 2254 static void 2255 t4_aiotx_queue_toep(struct toepcb *toep) 2256 { 2257 2258 SOCKBUF_LOCK_ASSERT(&toep->inp->inp_socket->so_snd); 2259 #ifdef VERBOSE_TRACES 2260 CTR3(KTR_CXGBE, "%s: queueing aiotx task for tid %d, active = %s", 2261 __func__, toep->tid, toep->aiotx_task_active ? "true" : "false"); 2262 #endif 2263 if (toep->aiotx_task_active) 2264 return; 2265 toep->aiotx_task_active = true; 2266 hold_toepcb(toep); 2267 soaio_enqueue(&toep->aiotx_task); 2268 } 2269 2270 static void 2271 t4_aiotx_cancel(struct kaiocb *job) 2272 { 2273 struct aiotx_buffer *ab; 2274 struct socket *so; 2275 struct sockbuf *sb; 2276 struct tcpcb *tp; 2277 struct toepcb *toep; 2278 2279 so = job->fd_file->f_data; 2280 tp = so_sototcpcb(so); 2281 toep = tp->t_toe; 2282 MPASS(job->uaiocb.aio_lio_opcode == LIO_WRITE); 2283 sb = &so->so_snd; 2284 2285 SOCKBUF_LOCK(sb); 2286 if (!aio_cancel_cleared(job)) 2287 TAILQ_REMOVE(&toep->aiotx_jobq, job, list); 2288 SOCKBUF_UNLOCK(sb); 2289 2290 ab = job->backend1; 2291 if (ab != NULL) 2292 free_aiotx_buffer(ab); 2293 else 2294 aio_cancel(job); 2295 } 2296 2297 int 2298 t4_aio_queue_aiotx(struct socket *so, struct kaiocb *job) 2299 { 2300 struct tcpcb *tp = so_sototcpcb(so); 2301 struct toepcb *toep = tp->t_toe; 2302 struct adapter *sc = td_adapter(toep->td); 2303 2304 /* This only handles writes. */ 2305 if (job->uaiocb.aio_lio_opcode != LIO_WRITE) 2306 return (EOPNOTSUPP); 2307 2308 if (!sc->tt.tx_zcopy) 2309 return (EOPNOTSUPP); 2310 2311 SOCKBUF_LOCK(&so->so_snd); 2312 #ifdef VERBOSE_TRACES 2313 CTR2(KTR_CXGBE, "%s: queueing %p", __func__, job); 2314 #endif 2315 if (!aio_set_cancel_function(job, t4_aiotx_cancel)) 2316 panic("new job was cancelled"); 2317 TAILQ_INSERT_TAIL(&toep->aiotx_jobq, job, list); 2318 if (sowriteable(so)) 2319 t4_aiotx_queue_toep(toep); 2320 SOCKBUF_UNLOCK(&so->so_snd); 2321 return (0); 2322 } 2323 2324 void 2325 aiotx_init_toep(struct toepcb *toep) 2326 { 2327 2328 TAILQ_INIT(&toep->aiotx_jobq); 2329 TASK_INIT(&toep->aiotx_task, 0, t4_aiotx_task, toep); 2330 } 2331 #endif 2332