1 /*- 2 * Copyright (c) 2012 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 33 #ifdef TCP_OFFLOAD 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/kernel.h> 37 #include <sys/ktr.h> 38 #include <sys/module.h> 39 #include <sys/protosw.h> 40 #include <sys/domain.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/sglist.h> 44 #include <netinet/in.h> 45 #include <netinet/in_pcb.h> 46 #include <netinet/ip.h> 47 #include <netinet/tcp_var.h> 48 #define TCPSTATES 49 #include <netinet/tcp_fsm.h> 50 #include <netinet/tcp_seq.h> 51 #include <netinet/toecore.h> 52 53 #include "common/common.h" 54 #include "common/t4_msg.h" 55 #include "common/t4_regs.h" 56 #include "common/t4_tcb.h" 57 #include "tom/t4_tom_l2t.h" 58 #include "tom/t4_tom.h" 59 60 VNET_DECLARE(int, tcp_do_autosndbuf); 61 #define V_tcp_do_autosndbuf VNET(tcp_do_autosndbuf) 62 VNET_DECLARE(int, tcp_autosndbuf_inc); 63 #define V_tcp_autosndbuf_inc VNET(tcp_autosndbuf_inc) 64 VNET_DECLARE(int, tcp_autosndbuf_max); 65 #define V_tcp_autosndbuf_max VNET(tcp_autosndbuf_max) 66 VNET_DECLARE(int, tcp_do_autorcvbuf); 67 #define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf) 68 VNET_DECLARE(int, tcp_autorcvbuf_inc); 69 #define V_tcp_autorcvbuf_inc VNET(tcp_autorcvbuf_inc) 70 VNET_DECLARE(int, tcp_autorcvbuf_max); 71 #define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) 72 73 void 74 send_flowc_wr(struct toepcb *toep, struct flowc_tx_params *ftxp) 75 { 76 struct wrqe *wr; 77 struct fw_flowc_wr *flowc; 78 unsigned int nparams = ftxp ? 8 : 6, flowclen; 79 struct port_info *pi = toep->port; 80 struct adapter *sc = pi->adapter; 81 unsigned int pfvf = G_FW_VIID_PFN(pi->viid) << S_FW_VIID_PFN; 82 struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; 83 84 KASSERT(!(toep->flags & TPF_FLOWC_WR_SENT), 85 ("%s: flowc for tid %u sent already", __func__, toep->tid)); 86 87 CTR2(KTR_CXGBE, "%s: tid %u", __func__, toep->tid); 88 89 flowclen = sizeof(*flowc) + nparams * sizeof(struct fw_flowc_mnemval); 90 91 wr = alloc_wrqe(roundup(flowclen, 16), toep->ofld_txq); 92 if (wr == NULL) { 93 /* XXX */ 94 panic("%s: allocation failure.", __func__); 95 } 96 flowc = wrtod(wr); 97 memset(flowc, 0, wr->wr_len); 98 99 flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) | 100 V_FW_FLOWC_WR_NPARAMS(nparams)); 101 flowc->flowid_len16 = htonl(V_FW_WR_LEN16(howmany(flowclen, 16)) | 102 V_FW_WR_FLOWID(toep->tid)); 103 104 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 105 flowc->mnemval[0].val = htobe32(pfvf); 106 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 107 flowc->mnemval[1].val = htobe32(pi->tx_chan); 108 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 109 flowc->mnemval[2].val = htobe32(pi->tx_chan); 110 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 111 flowc->mnemval[3].val = htobe32(toep->ofld_rxq->iq.abs_id); 112 if (ftxp) { 113 uint32_t sndbuf = min(ftxp->snd_space, sc->tt.sndbuf); 114 115 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 116 flowc->mnemval[4].val = htobe32(ftxp->snd_nxt); 117 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 118 flowc->mnemval[5].val = htobe32(ftxp->rcv_nxt); 119 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 120 flowc->mnemval[6].val = htobe32(sndbuf); 121 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 122 flowc->mnemval[7].val = htobe32(ftxp->mss); 123 } else { 124 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDBUF; 125 flowc->mnemval[4].val = htobe32(512); 126 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_MSS; 127 flowc->mnemval[5].val = htobe32(512); 128 } 129 130 txsd->tx_credits = howmany(flowclen, 16); 131 txsd->plen = 0; 132 KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0, 133 ("%s: not enough credits (%d)", __func__, toep->tx_credits)); 134 toep->tx_credits -= txsd->tx_credits; 135 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 136 toep->txsd_pidx = 0; 137 toep->txsd_avail--; 138 139 toep->flags |= TPF_FLOWC_WR_SENT; 140 t4_wrq_tx(sc, wr); 141 } 142 143 void 144 send_reset(struct adapter *sc, struct toepcb *toep, uint32_t snd_nxt) 145 { 146 struct wrqe *wr; 147 struct cpl_abort_req *req; 148 int tid = toep->tid; 149 struct inpcb *inp = toep->inp; 150 struct tcpcb *tp = intotcpcb(inp); /* don't use if INP_DROPPED */ 151 152 INP_WLOCK_ASSERT(inp); 153 154 CTR6(KTR_CXGBE, "%s: tid %d (%s), toep_flags 0x%x, inp_flags 0x%x%s", 155 __func__, toep->tid, 156 inp->inp_flags & INP_DROPPED ? "inp dropped" : 157 tcpstates[tp->t_state], 158 toep->flags, inp->inp_flags, 159 toep->flags & TPF_ABORT_SHUTDOWN ? 160 " (abort already in progress)" : ""); 161 162 if (toep->flags & TPF_ABORT_SHUTDOWN) 163 return; /* abort already in progress */ 164 165 toep->flags |= TPF_ABORT_SHUTDOWN; 166 167 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 168 ("%s: flowc_wr not sent for tid %d.", __func__, tid)); 169 170 wr = alloc_wrqe(sizeof(*req), toep->ofld_txq); 171 if (wr == NULL) { 172 /* XXX */ 173 panic("%s: allocation failure.", __func__); 174 } 175 req = wrtod(wr); 176 177 INIT_TP_WR_MIT_CPL(req, CPL_ABORT_REQ, tid); 178 if (inp->inp_flags & INP_DROPPED) 179 req->rsvd0 = htobe32(snd_nxt); 180 else 181 req->rsvd0 = htobe32(tp->snd_nxt); 182 req->rsvd1 = !(toep->flags & TPF_TX_DATA_SENT); 183 req->cmd = CPL_ABORT_SEND_RST; 184 185 /* 186 * XXX: What's the correct way to tell that the inp hasn't been detached 187 * from its socket? Should I even be flushing the snd buffer here? 188 */ 189 if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) { 190 struct socket *so = inp->inp_socket; 191 192 if (so != NULL) /* because I'm not sure. See comment above */ 193 sbflush(&so->so_snd); 194 } 195 196 t4_l2t_send(sc, wr, toep->l2te); 197 } 198 199 /* 200 * Called when a connection is established to translate the TCP options 201 * reported by HW to FreeBSD's native format. 202 */ 203 static void 204 assign_rxopt(struct tcpcb *tp, unsigned int opt) 205 { 206 struct toepcb *toep = tp->t_toe; 207 struct adapter *sc = td_adapter(toep->td); 208 209 INP_LOCK_ASSERT(tp->t_inpcb); 210 211 tp->t_maxseg = tp->t_maxopd = sc->params.mtus[G_TCPOPT_MSS(opt)] - 40; 212 213 if (G_TCPOPT_TSTAMP(opt)) { 214 tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */ 215 tp->ts_recent = 0; /* hmmm */ 216 tp->ts_recent_age = tcp_ts_getticks(); 217 tp->t_maxseg -= TCPOLEN_TSTAMP_APPA; 218 } 219 220 if (G_TCPOPT_SACK(opt)) 221 tp->t_flags |= TF_SACK_PERMIT; /* should already be set */ 222 else 223 tp->t_flags &= ~TF_SACK_PERMIT; /* sack disallowed by peer */ 224 225 if (G_TCPOPT_WSCALE_OK(opt)) 226 tp->t_flags |= TF_RCVD_SCALE; 227 228 /* Doing window scaling? */ 229 if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == 230 (TF_RCVD_SCALE | TF_REQ_SCALE)) { 231 tp->rcv_scale = tp->request_r_scale; 232 tp->snd_scale = G_TCPOPT_SND_WSCALE(opt); 233 } 234 } 235 236 /* 237 * Completes some final bits of initialization for just established connections 238 * and changes their state to TCPS_ESTABLISHED. 239 * 240 * The ISNs are from after the exchange of SYNs. i.e., the true ISN + 1. 241 */ 242 void 243 make_established(struct toepcb *toep, uint32_t snd_isn, uint32_t rcv_isn, 244 uint16_t opt) 245 { 246 struct inpcb *inp = toep->inp; 247 struct socket *so = inp->inp_socket; 248 struct tcpcb *tp = intotcpcb(inp); 249 long bufsize; 250 uint32_t iss = be32toh(snd_isn) - 1; /* true ISS */ 251 uint32_t irs = be32toh(rcv_isn) - 1; /* true IRS */ 252 uint16_t tcpopt = be16toh(opt); 253 struct flowc_tx_params ftxp; 254 255 INP_WLOCK_ASSERT(inp); 256 KASSERT(tp->t_state == TCPS_SYN_SENT || 257 tp->t_state == TCPS_SYN_RECEIVED, 258 ("%s: TCP state %s", __func__, tcpstates[tp->t_state])); 259 260 CTR4(KTR_CXGBE, "%s: tid %d, toep %p, inp %p", 261 __func__, toep->tid, toep, inp); 262 263 tp->t_state = TCPS_ESTABLISHED; 264 tp->t_starttime = ticks; 265 TCPSTAT_INC(tcps_connects); 266 267 tp->irs = irs; 268 tcp_rcvseqinit(tp); 269 tp->rcv_wnd = toep->rx_credits << 10; 270 tp->rcv_adv += tp->rcv_wnd; 271 tp->last_ack_sent = tp->rcv_nxt; 272 273 /* 274 * If we were unable to send all rx credits via opt0, save the remainder 275 * in rx_credits so that they can be handed over with the next credit 276 * update. 277 */ 278 SOCKBUF_LOCK(&so->so_rcv); 279 bufsize = select_rcv_wnd(so); 280 SOCKBUF_UNLOCK(&so->so_rcv); 281 toep->rx_credits = bufsize - tp->rcv_wnd; 282 283 tp->iss = iss; 284 tcp_sendseqinit(tp); 285 tp->snd_una = iss + 1; 286 tp->snd_nxt = iss + 1; 287 tp->snd_max = iss + 1; 288 289 assign_rxopt(tp, tcpopt); 290 291 SOCKBUF_LOCK(&so->so_snd); 292 if (so->so_snd.sb_flags & SB_AUTOSIZE && V_tcp_do_autosndbuf) 293 bufsize = V_tcp_autosndbuf_max; 294 else 295 bufsize = sbspace(&so->so_snd); 296 SOCKBUF_UNLOCK(&so->so_snd); 297 298 ftxp.snd_nxt = tp->snd_nxt; 299 ftxp.rcv_nxt = tp->rcv_nxt; 300 ftxp.snd_space = bufsize; 301 ftxp.mss = tp->t_maxseg; 302 send_flowc_wr(toep, &ftxp); 303 304 soisconnected(so); 305 } 306 307 static int 308 send_rx_credits(struct adapter *sc, struct toepcb *toep, int credits) 309 { 310 struct wrqe *wr; 311 struct cpl_rx_data_ack *req; 312 uint32_t dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); 313 314 KASSERT(credits >= 0, ("%s: %d credits", __func__, credits)); 315 316 wr = alloc_wrqe(sizeof(*req), toep->ctrlq); 317 if (wr == NULL) 318 return (0); 319 req = wrtod(wr); 320 321 INIT_TP_WR_MIT_CPL(req, CPL_RX_DATA_ACK, toep->tid); 322 req->credit_dack = htobe32(dack | V_RX_CREDITS(credits)); 323 324 t4_wrq_tx(sc, wr); 325 return (credits); 326 } 327 328 void 329 t4_rcvd(struct toedev *tod, struct tcpcb *tp) 330 { 331 struct adapter *sc = tod->tod_softc; 332 struct inpcb *inp = tp->t_inpcb; 333 struct socket *so = inp->inp_socket; 334 struct sockbuf *sb = &so->so_rcv; 335 struct toepcb *toep = tp->t_toe; 336 int credits; 337 338 INP_WLOCK_ASSERT(inp); 339 340 SOCKBUF_LOCK(sb); 341 KASSERT(toep->sb_cc >= sb->sb_cc, 342 ("%s: sb %p has more data (%d) than last time (%d).", 343 __func__, sb, sb->sb_cc, toep->sb_cc)); 344 toep->rx_credits += toep->sb_cc - sb->sb_cc; 345 toep->sb_cc = sb->sb_cc; 346 credits = toep->rx_credits; 347 SOCKBUF_UNLOCK(sb); 348 349 if (credits > 0 && 350 (credits + 16384 >= tp->rcv_wnd || credits >= 15 * 1024)) { 351 352 credits = send_rx_credits(sc, toep, credits); 353 SOCKBUF_LOCK(sb); 354 toep->rx_credits -= credits; 355 SOCKBUF_UNLOCK(sb); 356 tp->rcv_wnd += credits; 357 tp->rcv_adv += credits; 358 } 359 } 360 361 /* 362 * Close a connection by sending a CPL_CLOSE_CON_REQ message. 363 */ 364 static int 365 close_conn(struct adapter *sc, struct toepcb *toep) 366 { 367 struct wrqe *wr; 368 struct cpl_close_con_req *req; 369 unsigned int tid = toep->tid; 370 371 CTR3(KTR_CXGBE, "%s: tid %u%s", __func__, toep->tid, 372 toep->flags & TPF_FIN_SENT ? ", IGNORED" : ""); 373 374 if (toep->flags & TPF_FIN_SENT) 375 return (0); 376 377 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 378 ("%s: flowc_wr not sent for tid %u.", __func__, tid)); 379 380 wr = alloc_wrqe(sizeof(*req), toep->ofld_txq); 381 if (wr == NULL) { 382 /* XXX */ 383 panic("%s: allocation failure.", __func__); 384 } 385 req = wrtod(wr); 386 387 req->wr.wr_hi = htonl(V_FW_WR_OP(FW_TP_WR) | 388 V_FW_WR_IMMDLEN(sizeof(*req) - sizeof(req->wr))); 389 req->wr.wr_mid = htonl(V_FW_WR_LEN16(howmany(sizeof(*req), 16)) | 390 V_FW_WR_FLOWID(tid)); 391 req->wr.wr_lo = cpu_to_be64(0); 392 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); 393 req->rsvd = 0; 394 395 toep->flags |= TPF_FIN_SENT; 396 toep->flags &= ~TPF_SEND_FIN; 397 t4_l2t_send(sc, wr, toep->l2te); 398 399 return (0); 400 } 401 402 #define MAX_OFLD_TX_CREDITS (SGE_MAX_WR_LEN / 16) 403 #define MIN_OFLD_TX_CREDITS (howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16)) 404 405 /* Maximum amount of immediate data we could stuff in a WR */ 406 static inline int 407 max_imm_payload(int tx_credits) 408 { 409 const int n = 2; /* Use only up to 2 desc for imm. data WR */ 410 411 KASSERT(tx_credits >= 0 && 412 tx_credits <= MAX_OFLD_TX_CREDITS, 413 ("%s: %d credits", __func__, tx_credits)); 414 415 if (tx_credits < MIN_OFLD_TX_CREDITS) 416 return (0); 417 418 if (tx_credits >= (n * EQ_ESIZE) / 16) 419 return ((n * EQ_ESIZE) - sizeof(struct fw_ofld_tx_data_wr)); 420 else 421 return (tx_credits * 16 - sizeof(struct fw_ofld_tx_data_wr)); 422 } 423 424 /* Maximum number of SGL entries we could stuff in a WR */ 425 static inline int 426 max_dsgl_nsegs(int tx_credits) 427 { 428 int nseg = 1; /* ulptx_sgl has room for 1, rest ulp_tx_sge_pair */ 429 int sge_pair_credits = tx_credits - MIN_OFLD_TX_CREDITS; 430 431 KASSERT(tx_credits >= 0 && 432 tx_credits <= MAX_OFLD_TX_CREDITS, 433 ("%s: %d credits", __func__, tx_credits)); 434 435 if (tx_credits < MIN_OFLD_TX_CREDITS) 436 return (0); 437 438 nseg += 2 * (sge_pair_credits * 16 / 24); 439 if ((sge_pair_credits * 16) % 24 == 16) 440 nseg++; 441 442 return (nseg); 443 } 444 445 static inline void 446 write_tx_wr(void *dst, struct toepcb *toep, unsigned int immdlen, 447 unsigned int plen, uint8_t credits, int more_to_come) 448 { 449 struct fw_ofld_tx_data_wr *txwr = dst; 450 int shove = !more_to_come; 451 int compl = 1; 452 453 /* 454 * We always request completion notifications from the firmware. The 455 * only exception is when we know we'll get more data to send shortly 456 * and that we'll have some tx credits remaining to transmit that data. 457 */ 458 if (more_to_come && toep->tx_credits - credits >= MIN_OFLD_TX_CREDITS) 459 compl = 0; 460 461 txwr->op_to_immdlen = htobe32(V_WR_OP(FW_OFLD_TX_DATA_WR) | 462 V_FW_WR_COMPL(compl) | V_FW_WR_IMMDLEN(immdlen)); 463 txwr->flowid_len16 = htobe32(V_FW_WR_FLOWID(toep->tid) | 464 V_FW_WR_LEN16(credits)); 465 txwr->tunnel_to_proxy = 466 htobe32(V_FW_OFLD_TX_DATA_WR_ULPMODE(toep->ulp_mode) | 467 V_FW_OFLD_TX_DATA_WR_URGENT(0) | /* XXX */ 468 V_FW_OFLD_TX_DATA_WR_SHOVE(shove)); 469 txwr->plen = htobe32(plen); 470 } 471 472 /* 473 * Generate a DSGL from a starting mbuf. The total number of segments and the 474 * maximum segments in any one mbuf are provided. 475 */ 476 static void 477 write_tx_sgl(void *dst, struct mbuf *start, struct mbuf *stop, int nsegs, int n) 478 { 479 struct mbuf *m; 480 struct ulptx_sgl *usgl = dst; 481 int i, j, rc; 482 struct sglist sg; 483 struct sglist_seg segs[n]; 484 485 KASSERT(nsegs > 0, ("%s: nsegs 0", __func__)); 486 487 sglist_init(&sg, n, segs); 488 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 489 V_ULPTX_NSGE(nsegs)); 490 491 i = -1; 492 for (m = start; m != stop; m = m->m_next) { 493 rc = sglist_append(&sg, mtod(m, void *), m->m_len); 494 if (__predict_false(rc != 0)) 495 panic("%s: sglist_append %d", __func__, rc); 496 497 for (j = 0; j < sg.sg_nseg; i++, j++) { 498 if (i < 0) { 499 usgl->len0 = htobe32(segs[j].ss_len); 500 usgl->addr0 = htobe64(segs[j].ss_paddr); 501 } else { 502 usgl->sge[i / 2].len[i & 1] = 503 htobe32(segs[j].ss_len); 504 usgl->sge[i / 2].addr[i & 1] = 505 htobe64(segs[j].ss_paddr); 506 } 507 #ifdef INVARIANTS 508 nsegs--; 509 #endif 510 } 511 sglist_reset(&sg); 512 } 513 if (i & 1) 514 usgl->sge[i / 2].len[1] = htobe32(0); 515 KASSERT(nsegs == 0, ("%s: nsegs %d, start %p, stop %p", 516 __func__, nsegs, start, stop)); 517 } 518 519 /* 520 * Max number of SGL entries an offload tx work request can have. This is 41 521 * (1 + 40) for a full 512B work request. 522 * fw_ofld_tx_data_wr(16B) + ulptx_sgl(16B, 1) + ulptx_sge_pair(480B, 40) 523 */ 524 #define OFLD_SGL_LEN (41) 525 526 /* 527 * Send data and/or a FIN to the peer. 528 * 529 * The socket's so_snd buffer consists of a stream of data starting with sb_mb 530 * and linked together with m_next. sb_sndptr, if set, is the last mbuf that 531 * was transmitted. 532 */ 533 static void 534 t4_push_frames(struct adapter *sc, struct toepcb *toep) 535 { 536 struct mbuf *sndptr, *m, *sb_sndptr; 537 struct fw_ofld_tx_data_wr *txwr; 538 struct wrqe *wr; 539 unsigned int plen, nsegs, credits, max_imm, max_nsegs, max_nsegs_1mbuf; 540 struct inpcb *inp = toep->inp; 541 struct tcpcb *tp = intotcpcb(inp); 542 struct socket *so = inp->inp_socket; 543 struct sockbuf *sb = &so->so_snd; 544 int tx_credits; 545 struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; 546 547 INP_WLOCK_ASSERT(inp); 548 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 549 ("%s: flowc_wr not sent for tid %u.", __func__, toep->tid)); 550 551 if (__predict_false(toep->ulp_mode != ULP_MODE_NONE && 552 toep->ulp_mode != ULP_MODE_TCPDDP)) 553 CXGBE_UNIMPLEMENTED("ulp_mode"); 554 555 /* 556 * This function doesn't resume by itself. Someone else must clear the 557 * flag and call this function. 558 */ 559 if (__predict_false(toep->flags & TPF_TX_SUSPENDED)) 560 return; 561 562 do { 563 tx_credits = min(toep->tx_credits, MAX_OFLD_TX_CREDITS); 564 max_imm = max_imm_payload(tx_credits); 565 max_nsegs = max_dsgl_nsegs(tx_credits); 566 567 SOCKBUF_LOCK(sb); 568 sb_sndptr = sb->sb_sndptr; 569 sndptr = sb_sndptr ? sb_sndptr->m_next : sb->sb_mb; 570 plen = 0; 571 nsegs = 0; 572 max_nsegs_1mbuf = 0; /* max # of SGL segments in any one mbuf */ 573 for (m = sndptr; m != NULL; m = m->m_next) { 574 int n = sglist_count(mtod(m, void *), m->m_len); 575 576 nsegs += n; 577 plen += m->m_len; 578 579 /* This mbuf sent us _over_ the nsegs limit, back out */ 580 if (plen > max_imm && nsegs > max_nsegs) { 581 nsegs -= n; 582 plen -= m->m_len; 583 if (plen == 0) { 584 /* Too few credits */ 585 toep->flags |= TPF_TX_SUSPENDED; 586 SOCKBUF_UNLOCK(sb); 587 return; 588 } 589 break; 590 } 591 592 if (max_nsegs_1mbuf < n) 593 max_nsegs_1mbuf = n; 594 sb_sndptr = m; /* new sb->sb_sndptr if all goes well */ 595 596 /* This mbuf put us right at the max_nsegs limit */ 597 if (plen > max_imm && nsegs == max_nsegs) { 598 m = m->m_next; 599 break; 600 } 601 } 602 603 if (sb->sb_flags & SB_AUTOSIZE && 604 V_tcp_do_autosndbuf && 605 sb->sb_hiwat < V_tcp_autosndbuf_max && 606 sbspace(sb) < sb->sb_hiwat / 8 * 7) { 607 int newsize = min(sb->sb_hiwat + V_tcp_autosndbuf_inc, 608 V_tcp_autosndbuf_max); 609 610 if (!sbreserve_locked(sb, newsize, so, NULL)) 611 sb->sb_flags &= ~SB_AUTOSIZE; 612 else { 613 sowwakeup_locked(so); /* room available */ 614 SOCKBUF_UNLOCK_ASSERT(sb); 615 goto unlocked; 616 } 617 } 618 SOCKBUF_UNLOCK(sb); 619 unlocked: 620 621 /* nothing to send */ 622 if (plen == 0) { 623 KASSERT(m == NULL, 624 ("%s: nothing to send, but m != NULL", __func__)); 625 break; 626 } 627 628 if (__predict_false(toep->flags & TPF_FIN_SENT)) 629 panic("%s: excess tx.", __func__); 630 631 if (plen <= max_imm) { 632 633 /* Immediate data tx */ 634 635 wr = alloc_wrqe(roundup(sizeof(*txwr) + plen, 16), 636 toep->ofld_txq); 637 if (wr == NULL) { 638 /* XXX: how will we recover from this? */ 639 toep->flags |= TPF_TX_SUSPENDED; 640 return; 641 } 642 txwr = wrtod(wr); 643 credits = howmany(wr->wr_len, 16); 644 write_tx_wr(txwr, toep, plen, plen, credits, 645 tp->t_flags & TF_MORETOCOME); 646 m_copydata(sndptr, 0, plen, (void *)(txwr + 1)); 647 } else { 648 int wr_len; 649 650 /* DSGL tx */ 651 652 wr_len = sizeof(*txwr) + sizeof(struct ulptx_sgl) + 653 ((3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1)) * 8; 654 wr = alloc_wrqe(roundup(wr_len, 16), toep->ofld_txq); 655 if (wr == NULL) { 656 /* XXX: how will we recover from this? */ 657 toep->flags |= TPF_TX_SUSPENDED; 658 return; 659 } 660 txwr = wrtod(wr); 661 credits = howmany(wr_len, 16); 662 write_tx_wr(txwr, toep, 0, plen, credits, 663 tp->t_flags & TF_MORETOCOME); 664 write_tx_sgl(txwr + 1, sndptr, m, nsegs, 665 max_nsegs_1mbuf); 666 if (wr_len & 0xf) { 667 uint64_t *pad = (uint64_t *) 668 ((uintptr_t)txwr + wr_len); 669 *pad = 0; 670 } 671 } 672 673 KASSERT(toep->tx_credits >= credits, 674 ("%s: not enough credits", __func__)); 675 676 toep->tx_credits -= credits; 677 678 tp->snd_nxt += plen; 679 tp->snd_max += plen; 680 681 SOCKBUF_LOCK(sb); 682 KASSERT(sb_sndptr, ("%s: sb_sndptr is NULL", __func__)); 683 sb->sb_sndptr = sb_sndptr; 684 SOCKBUF_UNLOCK(sb); 685 686 toep->flags |= TPF_TX_DATA_SENT; 687 688 KASSERT(toep->txsd_avail > 0, ("%s: no txsd", __func__)); 689 txsd->plen = plen; 690 txsd->tx_credits = credits; 691 txsd++; 692 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) { 693 toep->txsd_pidx = 0; 694 txsd = &toep->txsd[0]; 695 } 696 toep->txsd_avail--; 697 698 t4_l2t_send(sc, wr, toep->l2te); 699 } while (m != NULL); 700 701 /* Send a FIN if requested, but only if there's no more data to send */ 702 if (m == NULL && toep->flags & TPF_SEND_FIN) 703 close_conn(sc, toep); 704 } 705 706 int 707 t4_tod_output(struct toedev *tod, struct tcpcb *tp) 708 { 709 struct adapter *sc = tod->tod_softc; 710 #ifdef INVARIANTS 711 struct inpcb *inp = tp->t_inpcb; 712 #endif 713 struct toepcb *toep = tp->t_toe; 714 715 INP_WLOCK_ASSERT(inp); 716 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 717 ("%s: inp %p dropped.", __func__, inp)); 718 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 719 720 t4_push_frames(sc, toep); 721 722 return (0); 723 } 724 725 int 726 t4_send_fin(struct toedev *tod, struct tcpcb *tp) 727 { 728 struct adapter *sc = tod->tod_softc; 729 #ifdef INVARIANTS 730 struct inpcb *inp = tp->t_inpcb; 731 #endif 732 struct toepcb *toep = tp->t_toe; 733 734 INP_WLOCK_ASSERT(inp); 735 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 736 ("%s: inp %p dropped.", __func__, inp)); 737 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 738 739 toep->flags |= TPF_SEND_FIN; 740 t4_push_frames(sc, toep); 741 742 return (0); 743 } 744 745 int 746 t4_send_rst(struct toedev *tod, struct tcpcb *tp) 747 { 748 struct adapter *sc = tod->tod_softc; 749 #if defined(INVARIANTS) 750 struct inpcb *inp = tp->t_inpcb; 751 #endif 752 struct toepcb *toep = tp->t_toe; 753 754 INP_WLOCK_ASSERT(inp); 755 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 756 ("%s: inp %p dropped.", __func__, inp)); 757 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 758 759 /* hmmmm */ 760 KASSERT(toep->flags & TPF_FLOWC_WR_SENT, 761 ("%s: flowc for tid %u [%s] not sent already", 762 __func__, toep->tid, tcpstates[tp->t_state])); 763 764 send_reset(sc, toep, 0); 765 return (0); 766 } 767 768 /* 769 * Peer has sent us a FIN. 770 */ 771 static int 772 do_peer_close(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 773 { 774 struct adapter *sc = iq->adapter; 775 const struct cpl_peer_close *cpl = (const void *)(rss + 1); 776 unsigned int tid = GET_TID(cpl); 777 struct toepcb *toep = lookup_tid(sc, tid); 778 struct inpcb *inp = toep->inp; 779 struct tcpcb *tp = NULL; 780 struct socket *so; 781 struct sockbuf *sb; 782 #ifdef INVARIANTS 783 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 784 #endif 785 786 KASSERT(opcode == CPL_PEER_CLOSE, 787 ("%s: unexpected opcode 0x%x", __func__, opcode)); 788 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 789 790 if (__predict_false(toep->flags & TPF_SYNQE)) { 791 #ifdef INVARIANTS 792 struct synq_entry *synqe = (void *)toep; 793 794 INP_WLOCK(synqe->lctx->inp); 795 if (synqe->flags & TPF_SYNQE_HAS_L2TE) { 796 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 797 ("%s: listen socket closed but tid %u not aborted.", 798 __func__, tid)); 799 } else { 800 /* 801 * do_pass_accept_req is still running and will 802 * eventually take care of this tid. 803 */ 804 } 805 INP_WUNLOCK(synqe->lctx->inp); 806 #endif 807 CTR4(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x)", __func__, tid, 808 toep, toep->flags); 809 return (0); 810 } 811 812 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 813 814 INP_INFO_WLOCK(&V_tcbinfo); 815 INP_WLOCK(inp); 816 tp = intotcpcb(inp); 817 818 CTR5(KTR_CXGBE, "%s: tid %u (%s), toep_flags 0x%x, inp %p", __func__, 819 tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags, inp); 820 821 if (toep->flags & TPF_ABORT_SHUTDOWN) 822 goto done; 823 824 tp->rcv_nxt++; /* FIN */ 825 826 so = inp->inp_socket; 827 sb = &so->so_rcv; 828 SOCKBUF_LOCK(sb); 829 if (__predict_false(toep->ddp_flags & (DDP_BUF0_ACTIVE | DDP_BUF1_ACTIVE))) { 830 m = m_get(M_NOWAIT, MT_DATA); 831 if (m == NULL) 832 CXGBE_UNIMPLEMENTED("mbuf alloc failure"); 833 834 m->m_len = be32toh(cpl->rcv_nxt) - tp->rcv_nxt; 835 m->m_flags |= M_DDP; /* Data is already where it should be */ 836 m->m_data = "nothing to see here"; 837 tp->rcv_nxt = be32toh(cpl->rcv_nxt); 838 839 toep->ddp_flags &= ~(DDP_BUF0_ACTIVE | DDP_BUF1_ACTIVE); 840 841 KASSERT(toep->sb_cc >= sb->sb_cc, 842 ("%s: sb %p has more data (%d) than last time (%d).", 843 __func__, sb, sb->sb_cc, toep->sb_cc)); 844 toep->rx_credits += toep->sb_cc - sb->sb_cc; 845 #ifdef USE_DDP_RX_FLOW_CONTROL 846 toep->rx_credits -= m->m_len; /* adjust for F_RX_FC_DDP */ 847 #endif 848 sbappendstream_locked(sb, m); 849 toep->sb_cc = sb->sb_cc; 850 } 851 socantrcvmore_locked(so); /* unlocks the sockbuf */ 852 853 KASSERT(tp->rcv_nxt == be32toh(cpl->rcv_nxt), 854 ("%s: rcv_nxt mismatch: %u %u", __func__, tp->rcv_nxt, 855 be32toh(cpl->rcv_nxt))); 856 857 switch (tp->t_state) { 858 case TCPS_SYN_RECEIVED: 859 tp->t_starttime = ticks; 860 /* FALLTHROUGH */ 861 862 case TCPS_ESTABLISHED: 863 tp->t_state = TCPS_CLOSE_WAIT; 864 break; 865 866 case TCPS_FIN_WAIT_1: 867 tp->t_state = TCPS_CLOSING; 868 break; 869 870 case TCPS_FIN_WAIT_2: 871 tcp_twstart(tp); 872 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */ 873 INP_INFO_WUNLOCK(&V_tcbinfo); 874 875 INP_WLOCK(inp); 876 final_cpl_received(toep); 877 return (0); 878 879 default: 880 log(LOG_ERR, "%s: TID %u received CPL_PEER_CLOSE in state %d\n", 881 __func__, tid, tp->t_state); 882 } 883 done: 884 INP_WUNLOCK(inp); 885 INP_INFO_WUNLOCK(&V_tcbinfo); 886 return (0); 887 } 888 889 /* 890 * Peer has ACK'd our FIN. 891 */ 892 static int 893 do_close_con_rpl(struct sge_iq *iq, const struct rss_header *rss, 894 struct mbuf *m) 895 { 896 struct adapter *sc = iq->adapter; 897 const struct cpl_close_con_rpl *cpl = (const void *)(rss + 1); 898 unsigned int tid = GET_TID(cpl); 899 struct toepcb *toep = lookup_tid(sc, tid); 900 struct inpcb *inp = toep->inp; 901 struct tcpcb *tp = NULL; 902 struct socket *so = NULL; 903 #ifdef INVARIANTS 904 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 905 #endif 906 907 KASSERT(opcode == CPL_CLOSE_CON_RPL, 908 ("%s: unexpected opcode 0x%x", __func__, opcode)); 909 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 910 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 911 912 INP_INFO_WLOCK(&V_tcbinfo); 913 INP_WLOCK(inp); 914 tp = intotcpcb(inp); 915 916 CTR4(KTR_CXGBE, "%s: tid %u (%s), toep_flags 0x%x", 917 __func__, tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags); 918 919 if (toep->flags & TPF_ABORT_SHUTDOWN) 920 goto done; 921 922 so = inp->inp_socket; 923 tp->snd_una = be32toh(cpl->snd_nxt) - 1; /* exclude FIN */ 924 925 switch (tp->t_state) { 926 case TCPS_CLOSING: /* see TCPS_FIN_WAIT_2 in do_peer_close too */ 927 tcp_twstart(tp); 928 release: 929 INP_UNLOCK_ASSERT(inp); /* safe, we have a ref on the inp */ 930 INP_INFO_WUNLOCK(&V_tcbinfo); 931 932 INP_WLOCK(inp); 933 final_cpl_received(toep); /* no more CPLs expected */ 934 935 return (0); 936 case TCPS_LAST_ACK: 937 if (tcp_close(tp)) 938 INP_WUNLOCK(inp); 939 goto release; 940 941 case TCPS_FIN_WAIT_1: 942 if (so->so_rcv.sb_state & SBS_CANTRCVMORE) 943 soisdisconnected(so); 944 tp->t_state = TCPS_FIN_WAIT_2; 945 break; 946 947 default: 948 log(LOG_ERR, 949 "%s: TID %u received CPL_CLOSE_CON_RPL in state %s\n", 950 __func__, tid, tcpstates[tp->t_state]); 951 } 952 done: 953 INP_WUNLOCK(inp); 954 INP_INFO_WUNLOCK(&V_tcbinfo); 955 return (0); 956 } 957 958 void 959 send_abort_rpl(struct adapter *sc, struct sge_wrq *ofld_txq, int tid, 960 int rst_status) 961 { 962 struct wrqe *wr; 963 struct cpl_abort_rpl *cpl; 964 965 wr = alloc_wrqe(sizeof(*cpl), ofld_txq); 966 if (wr == NULL) { 967 /* XXX */ 968 panic("%s: allocation failure.", __func__); 969 } 970 cpl = wrtod(wr); 971 972 INIT_TP_WR_MIT_CPL(cpl, CPL_ABORT_RPL, tid); 973 cpl->cmd = rst_status; 974 975 t4_wrq_tx(sc, wr); 976 } 977 978 static int 979 abort_status_to_errno(struct tcpcb *tp, unsigned int abort_reason) 980 { 981 switch (abort_reason) { 982 case CPL_ERR_BAD_SYN: 983 case CPL_ERR_CONN_RESET: 984 return (tp->t_state == TCPS_CLOSE_WAIT ? EPIPE : ECONNRESET); 985 case CPL_ERR_XMIT_TIMEDOUT: 986 case CPL_ERR_PERSIST_TIMEDOUT: 987 case CPL_ERR_FINWAIT2_TIMEDOUT: 988 case CPL_ERR_KEEPALIVE_TIMEDOUT: 989 return (ETIMEDOUT); 990 default: 991 return (EIO); 992 } 993 } 994 995 /* 996 * TCP RST from the peer, timeout, or some other such critical error. 997 */ 998 static int 999 do_abort_req(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1000 { 1001 struct adapter *sc = iq->adapter; 1002 const struct cpl_abort_req_rss *cpl = (const void *)(rss + 1); 1003 unsigned int tid = GET_TID(cpl); 1004 struct toepcb *toep = lookup_tid(sc, tid); 1005 struct sge_wrq *ofld_txq = toep->ofld_txq; 1006 struct inpcb *inp; 1007 struct tcpcb *tp; 1008 #ifdef INVARIANTS 1009 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1010 #endif 1011 1012 KASSERT(opcode == CPL_ABORT_REQ_RSS, 1013 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1014 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1015 1016 if (toep->flags & TPF_SYNQE) 1017 return (do_abort_req_synqe(iq, rss, m)); 1018 1019 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1020 1021 if (negative_advice(cpl->status)) { 1022 CTR4(KTR_CXGBE, "%s: negative advice %d for tid %d (0x%x)", 1023 __func__, cpl->status, tid, toep->flags); 1024 return (0); /* Ignore negative advice */ 1025 } 1026 1027 inp = toep->inp; 1028 INP_INFO_WLOCK(&V_tcbinfo); /* for tcp_close */ 1029 INP_WLOCK(inp); 1030 1031 tp = intotcpcb(inp); 1032 1033 CTR6(KTR_CXGBE, 1034 "%s: tid %d (%s), toep_flags 0x%x, inp_flags 0x%x, status %d", 1035 __func__, tid, tp ? tcpstates[tp->t_state] : "no tp", toep->flags, 1036 inp->inp_flags, cpl->status); 1037 1038 /* 1039 * If we'd initiated an abort earlier the reply to it is responsible for 1040 * cleaning up resources. Otherwise we tear everything down right here 1041 * right now. We owe the T4 a CPL_ABORT_RPL no matter what. 1042 */ 1043 if (toep->flags & TPF_ABORT_SHUTDOWN) { 1044 INP_WUNLOCK(inp); 1045 goto done; 1046 } 1047 toep->flags |= TPF_ABORT_SHUTDOWN; 1048 1049 if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) { 1050 struct socket *so = inp->inp_socket; 1051 1052 if (so != NULL) 1053 so_error_set(so, abort_status_to_errno(tp, 1054 cpl->status)); 1055 tp = tcp_close(tp); 1056 if (tp == NULL) 1057 INP_WLOCK(inp); /* re-acquire */ 1058 } 1059 1060 final_cpl_received(toep); 1061 done: 1062 INP_INFO_WUNLOCK(&V_tcbinfo); 1063 send_abort_rpl(sc, ofld_txq, tid, CPL_ABORT_NO_RST); 1064 return (0); 1065 } 1066 1067 /* 1068 * Reply to the CPL_ABORT_REQ (send_reset) 1069 */ 1070 static int 1071 do_abort_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1072 { 1073 struct adapter *sc = iq->adapter; 1074 const struct cpl_abort_rpl_rss *cpl = (const void *)(rss + 1); 1075 unsigned int tid = GET_TID(cpl); 1076 struct toepcb *toep = lookup_tid(sc, tid); 1077 struct inpcb *inp = toep->inp; 1078 #ifdef INVARIANTS 1079 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1080 #endif 1081 1082 KASSERT(opcode == CPL_ABORT_RPL_RSS, 1083 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1084 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1085 1086 if (toep->flags & TPF_SYNQE) 1087 return (do_abort_rpl_synqe(iq, rss, m)); 1088 1089 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1090 1091 CTR5(KTR_CXGBE, "%s: tid %u, toep %p, inp %p, status %d", 1092 __func__, tid, toep, inp, cpl->status); 1093 1094 KASSERT(toep->flags & TPF_ABORT_SHUTDOWN, 1095 ("%s: wasn't expecting abort reply", __func__)); 1096 1097 INP_WLOCK(inp); 1098 final_cpl_received(toep); 1099 1100 return (0); 1101 } 1102 1103 static int 1104 do_rx_data(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1105 { 1106 struct adapter *sc = iq->adapter; 1107 const struct cpl_rx_data *cpl = mtod(m, const void *); 1108 unsigned int tid = GET_TID(cpl); 1109 struct toepcb *toep = lookup_tid(sc, tid); 1110 struct inpcb *inp = toep->inp; 1111 struct tcpcb *tp; 1112 struct socket *so; 1113 struct sockbuf *sb; 1114 int len; 1115 uint32_t ddp_placed = 0; 1116 1117 if (__predict_false(toep->flags & TPF_SYNQE)) { 1118 #ifdef INVARIANTS 1119 struct synq_entry *synqe = (void *)toep; 1120 1121 INP_WLOCK(synqe->lctx->inp); 1122 if (synqe->flags & TPF_SYNQE_HAS_L2TE) { 1123 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 1124 ("%s: listen socket closed but tid %u not aborted.", 1125 __func__, tid)); 1126 } else { 1127 /* 1128 * do_pass_accept_req is still running and will 1129 * eventually take care of this tid. 1130 */ 1131 } 1132 INP_WUNLOCK(synqe->lctx->inp); 1133 #endif 1134 CTR4(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x)", __func__, tid, 1135 toep, toep->flags); 1136 m_freem(m); 1137 return (0); 1138 } 1139 1140 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1141 1142 /* strip off CPL header */ 1143 m_adj(m, sizeof(*cpl)); 1144 len = m->m_pkthdr.len; 1145 1146 INP_WLOCK(inp); 1147 if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) { 1148 CTR4(KTR_CXGBE, "%s: tid %u, rx (%d bytes), inp_flags 0x%x", 1149 __func__, tid, len, inp->inp_flags); 1150 INP_WUNLOCK(inp); 1151 m_freem(m); 1152 return (0); 1153 } 1154 1155 tp = intotcpcb(inp); 1156 1157 if (__predict_false(tp->rcv_nxt != be32toh(cpl->seq))) 1158 ddp_placed = be32toh(cpl->seq) - tp->rcv_nxt; 1159 1160 tp->rcv_nxt += len; 1161 KASSERT(tp->rcv_wnd >= len, ("%s: negative window size", __func__)); 1162 tp->rcv_wnd -= len; 1163 tp->t_rcvtime = ticks; 1164 1165 so = inp_inpcbtosocket(inp); 1166 sb = &so->so_rcv; 1167 SOCKBUF_LOCK(sb); 1168 1169 if (__predict_false(sb->sb_state & SBS_CANTRCVMORE)) { 1170 CTR3(KTR_CXGBE, "%s: tid %u, excess rx (%d bytes)", 1171 __func__, tid, len); 1172 m_freem(m); 1173 SOCKBUF_UNLOCK(sb); 1174 INP_WUNLOCK(inp); 1175 1176 INP_INFO_WLOCK(&V_tcbinfo); 1177 INP_WLOCK(inp); 1178 tp = tcp_drop(tp, ECONNRESET); 1179 if (tp) 1180 INP_WUNLOCK(inp); 1181 INP_INFO_WUNLOCK(&V_tcbinfo); 1182 1183 return (0); 1184 } 1185 1186 /* receive buffer autosize */ 1187 if (sb->sb_flags & SB_AUTOSIZE && 1188 V_tcp_do_autorcvbuf && 1189 sb->sb_hiwat < V_tcp_autorcvbuf_max && 1190 len > (sbspace(sb) / 8 * 7)) { 1191 unsigned int hiwat = sb->sb_hiwat; 1192 unsigned int newsize = min(hiwat + V_tcp_autorcvbuf_inc, 1193 V_tcp_autorcvbuf_max); 1194 1195 if (!sbreserve_locked(sb, newsize, so, NULL)) 1196 sb->sb_flags &= ~SB_AUTOSIZE; 1197 else 1198 toep->rx_credits += newsize - hiwat; 1199 } 1200 1201 if (toep->ulp_mode == ULP_MODE_TCPDDP) { 1202 int changed = !(toep->ddp_flags & DDP_ON) ^ cpl->ddp_off; 1203 1204 if (changed) { 1205 if (toep->ddp_flags & DDP_SC_REQ) 1206 toep->ddp_flags ^= DDP_ON | DDP_SC_REQ; 1207 else { 1208 KASSERT(cpl->ddp_off == 1, 1209 ("%s: DDP switched on by itself.", 1210 __func__)); 1211 1212 /* Fell out of DDP mode */ 1213 toep->ddp_flags &= ~(DDP_ON | DDP_BUF0_ACTIVE | 1214 DDP_BUF1_ACTIVE); 1215 1216 if (ddp_placed) 1217 insert_ddp_data(toep, ddp_placed); 1218 } 1219 } 1220 1221 if ((toep->ddp_flags & DDP_OK) == 0 && 1222 time_uptime >= toep->ddp_disabled + DDP_RETRY_WAIT) { 1223 toep->ddp_score = DDP_LOW_SCORE; 1224 toep->ddp_flags |= DDP_OK; 1225 CTR3(KTR_CXGBE, "%s: tid %u DDP_OK @ %u", 1226 __func__, tid, time_uptime); 1227 } 1228 1229 if (toep->ddp_flags & DDP_ON) { 1230 1231 /* 1232 * CPL_RX_DATA with DDP on can only be an indicate. Ask 1233 * soreceive to post a buffer or disable DDP. The 1234 * payload that arrived in this indicate is appended to 1235 * the socket buffer as usual. 1236 */ 1237 1238 #if 0 1239 CTR5(KTR_CXGBE, 1240 "%s: tid %u (0x%x) DDP indicate (seq 0x%x, len %d)", 1241 __func__, tid, toep->flags, be32toh(cpl->seq), len); 1242 #endif 1243 sb->sb_flags |= SB_DDP_INDICATE; 1244 } else if ((toep->ddp_flags & (DDP_OK|DDP_SC_REQ)) == DDP_OK && 1245 tp->rcv_wnd > DDP_RSVD_WIN && len >= sc->tt.ddp_thres) { 1246 1247 /* 1248 * DDP allowed but isn't on (and a request to switch it 1249 * on isn't pending either), and conditions are ripe for 1250 * it to work. Switch it on. 1251 */ 1252 1253 enable_ddp(sc, toep); 1254 } 1255 } 1256 1257 KASSERT(toep->sb_cc >= sb->sb_cc, 1258 ("%s: sb %p has more data (%d) than last time (%d).", 1259 __func__, sb, sb->sb_cc, toep->sb_cc)); 1260 toep->rx_credits += toep->sb_cc - sb->sb_cc; 1261 sbappendstream_locked(sb, m); 1262 toep->sb_cc = sb->sb_cc; 1263 sorwakeup_locked(so); 1264 SOCKBUF_UNLOCK_ASSERT(sb); 1265 1266 INP_WUNLOCK(inp); 1267 return (0); 1268 } 1269 1270 #define S_CPL_FW4_ACK_OPCODE 24 1271 #define M_CPL_FW4_ACK_OPCODE 0xff 1272 #define V_CPL_FW4_ACK_OPCODE(x) ((x) << S_CPL_FW4_ACK_OPCODE) 1273 #define G_CPL_FW4_ACK_OPCODE(x) \ 1274 (((x) >> S_CPL_FW4_ACK_OPCODE) & M_CPL_FW4_ACK_OPCODE) 1275 1276 #define S_CPL_FW4_ACK_FLOWID 0 1277 #define M_CPL_FW4_ACK_FLOWID 0xffffff 1278 #define V_CPL_FW4_ACK_FLOWID(x) ((x) << S_CPL_FW4_ACK_FLOWID) 1279 #define G_CPL_FW4_ACK_FLOWID(x) \ 1280 (((x) >> S_CPL_FW4_ACK_FLOWID) & M_CPL_FW4_ACK_FLOWID) 1281 1282 #define S_CPL_FW4_ACK_CR 24 1283 #define M_CPL_FW4_ACK_CR 0xff 1284 #define V_CPL_FW4_ACK_CR(x) ((x) << S_CPL_FW4_ACK_CR) 1285 #define G_CPL_FW4_ACK_CR(x) (((x) >> S_CPL_FW4_ACK_CR) & M_CPL_FW4_ACK_CR) 1286 1287 #define S_CPL_FW4_ACK_SEQVAL 0 1288 #define M_CPL_FW4_ACK_SEQVAL 0x1 1289 #define V_CPL_FW4_ACK_SEQVAL(x) ((x) << S_CPL_FW4_ACK_SEQVAL) 1290 #define G_CPL_FW4_ACK_SEQVAL(x) \ 1291 (((x) >> S_CPL_FW4_ACK_SEQVAL) & M_CPL_FW4_ACK_SEQVAL) 1292 #define F_CPL_FW4_ACK_SEQVAL V_CPL_FW4_ACK_SEQVAL(1U) 1293 1294 static int 1295 do_fw4_ack(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1296 { 1297 struct adapter *sc = iq->adapter; 1298 const struct cpl_fw4_ack *cpl = (const void *)(rss + 1); 1299 unsigned int tid = G_CPL_FW4_ACK_FLOWID(be32toh(OPCODE_TID(cpl))); 1300 struct toepcb *toep = lookup_tid(sc, tid); 1301 struct inpcb *inp; 1302 struct tcpcb *tp; 1303 struct socket *so; 1304 uint8_t credits = cpl->credits; 1305 struct ofld_tx_sdesc *txsd; 1306 int plen; 1307 #ifdef INVARIANTS 1308 unsigned int opcode = G_CPL_FW4_ACK_OPCODE(be32toh(OPCODE_TID(cpl))); 1309 #endif 1310 1311 /* 1312 * Very unusual case: we'd sent a flowc + abort_req for a synq entry and 1313 * now this comes back carrying the credits for the flowc. 1314 */ 1315 if (__predict_false(toep->flags & TPF_SYNQE)) { 1316 KASSERT(toep->flags & TPF_ABORT_SHUTDOWN, 1317 ("%s: credits for a synq entry %p", __func__, toep)); 1318 return (0); 1319 } 1320 1321 inp = toep->inp; 1322 1323 KASSERT(opcode == CPL_FW4_ACK, 1324 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1325 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1326 KASSERT(toep->tid == tid, ("%s: toep tid mismatch", __func__)); 1327 1328 INP_WLOCK(inp); 1329 1330 if (__predict_false(toep->flags & TPF_ABORT_SHUTDOWN)) { 1331 INP_WUNLOCK(inp); 1332 return (0); 1333 } 1334 1335 KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0, 1336 ("%s: inp_flags 0x%x", __func__, inp->inp_flags)); 1337 1338 tp = intotcpcb(inp); 1339 1340 if (cpl->flags & CPL_FW4_ACK_FLAGS_SEQVAL) { 1341 tcp_seq snd_una = be32toh(cpl->snd_una); 1342 1343 #ifdef INVARIANTS 1344 if (__predict_false(SEQ_LT(snd_una, tp->snd_una))) { 1345 log(LOG_ERR, 1346 "%s: unexpected seq# %x for TID %u, snd_una %x\n", 1347 __func__, snd_una, toep->tid, tp->snd_una); 1348 } 1349 #endif 1350 1351 if (tp->snd_una != snd_una) { 1352 tp->snd_una = snd_una; 1353 tp->ts_recent_age = tcp_ts_getticks(); 1354 } 1355 } 1356 1357 so = inp->inp_socket; 1358 txsd = &toep->txsd[toep->txsd_cidx]; 1359 plen = 0; 1360 while (credits) { 1361 KASSERT(credits >= txsd->tx_credits, 1362 ("%s: too many (or partial) credits", __func__)); 1363 credits -= txsd->tx_credits; 1364 toep->tx_credits += txsd->tx_credits; 1365 plen += txsd->plen; 1366 txsd++; 1367 toep->txsd_avail++; 1368 KASSERT(toep->txsd_avail <= toep->txsd_total, 1369 ("%s: txsd avail > total", __func__)); 1370 if (__predict_false(++toep->txsd_cidx == toep->txsd_total)) { 1371 txsd = &toep->txsd[0]; 1372 toep->txsd_cidx = 0; 1373 } 1374 } 1375 1376 if (plen > 0) { 1377 struct sockbuf *sb = &so->so_snd; 1378 1379 SOCKBUF_LOCK(sb); 1380 sbdrop_locked(sb, plen); 1381 sowwakeup_locked(so); 1382 SOCKBUF_UNLOCK_ASSERT(sb); 1383 } 1384 1385 /* XXX */ 1386 if ((toep->flags & TPF_TX_SUSPENDED && 1387 toep->tx_credits >= MIN_OFLD_TX_CREDITS) || 1388 toep->tx_credits == toep->txsd_total * 1389 howmany((sizeof(struct fw_ofld_tx_data_wr) + 1), 16)) { 1390 toep->flags &= ~TPF_TX_SUSPENDED; 1391 t4_push_frames(sc, toep); 1392 } 1393 INP_WUNLOCK(inp); 1394 1395 return (0); 1396 } 1397 1398 static int 1399 do_set_tcb_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 1400 { 1401 struct adapter *sc = iq->adapter; 1402 const struct cpl_set_tcb_rpl *cpl = (const void *)(rss + 1); 1403 unsigned int tid = GET_TID(cpl); 1404 #ifdef INVARIANTS 1405 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1406 #endif 1407 1408 KASSERT(opcode == CPL_SET_TCB_RPL, 1409 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1410 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1411 1412 if (tid >= sc->tids.ftid_base && 1413 tid < sc->tids.ftid_base + sc->tids.nftids) 1414 return (t4_filter_rpl(iq, rss, m)); /* TCB is a filter */ 1415 1416 CXGBE_UNIMPLEMENTED(__func__); 1417 } 1418 1419 void 1420 t4_set_tcb_field(struct adapter *sc, struct toepcb *toep, uint16_t word, 1421 uint64_t mask, uint64_t val) 1422 { 1423 struct wrqe *wr; 1424 struct cpl_set_tcb_field *req; 1425 1426 wr = alloc_wrqe(sizeof(*req), toep->ctrlq); 1427 if (wr == NULL) { 1428 /* XXX */ 1429 panic("%s: allocation failure.", __func__); 1430 } 1431 req = wrtod(wr); 1432 1433 INIT_TP_WR_MIT_CPL(req, CPL_SET_TCB_FIELD, toep->tid); 1434 req->reply_ctrl = htobe16(V_NO_REPLY(1) | 1435 V_QUEUENO(toep->ofld_rxq->iq.abs_id)); 1436 req->word_cookie = htobe16(V_WORD(word) | V_COOKIE(0)); 1437 req->mask = htobe64(mask); 1438 req->val = htobe64(val); 1439 1440 t4_wrq_tx(sc, wr); 1441 } 1442 1443 void 1444 t4_init_cpl_io_handlers(struct adapter *sc) 1445 { 1446 1447 t4_register_cpl_handler(sc, CPL_PEER_CLOSE, do_peer_close); 1448 t4_register_cpl_handler(sc, CPL_CLOSE_CON_RPL, do_close_con_rpl); 1449 t4_register_cpl_handler(sc, CPL_ABORT_REQ_RSS, do_abort_req); 1450 t4_register_cpl_handler(sc, CPL_ABORT_RPL_RSS, do_abort_rpl); 1451 t4_register_cpl_handler(sc, CPL_RX_DATA, do_rx_data); 1452 t4_register_cpl_handler(sc, CPL_FW4_ACK, do_fw4_ack); 1453 t4_register_cpl_handler(sc, CPL_SET_TCB_RPL, do_set_tcb_rpl); 1454 } 1455 1456 void 1457 t4_uninit_cpl_io_handlers(struct adapter *sc) 1458 { 1459 1460 t4_register_cpl_handler(sc, CPL_SET_TCB_RPL, t4_filter_rpl); 1461 } 1462 #endif 1463