1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Chelsio Communications, Inc. 5 * All rights reserved. 6 * Written by: Navdeep Parhar <np@FreeBSD.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #ifdef TCP_OFFLOAD 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/ktr.h> 39 #include <sys/module.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/sysctl.h> 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_types.h> 48 #include <net/if_vlan_var.h> 49 #include <net/route.h> 50 #include <net/route/nhop.h> 51 #include <netinet/in.h> 52 #include <netinet/in_pcb.h> 53 #include <netinet/ip.h> 54 #define TCPSTATES 55 #include <netinet/tcp_fsm.h> 56 #include <netinet/tcp_var.h> 57 #include <netinet/toecore.h> 58 #include <netinet/cc/cc.h> 59 60 #include "common/common.h" 61 #include "common/t4_msg.h" 62 #include "common/t4_regs.h" 63 #include "common/t4_regs_values.h" 64 #include "t4_clip.h" 65 #include "tom/t4_tom_l2t.h" 66 #include "tom/t4_tom.h" 67 68 /* 69 * Active open succeeded. 70 */ 71 static int 72 do_act_establish(struct sge_iq *iq, const struct rss_header *rss, 73 struct mbuf *m) 74 { 75 struct adapter *sc = iq->adapter; 76 const struct cpl_act_establish *cpl = (const void *)(rss + 1); 77 u_int tid = GET_TID(cpl); 78 u_int atid = G_TID_TID(ntohl(cpl->tos_atid)); 79 struct toepcb *toep = lookup_atid(sc, atid); 80 struct inpcb *inp = toep->inp; 81 82 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 83 KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__)); 84 85 CTR3(KTR_CXGBE, "%s: atid %u, tid %u", __func__, atid, tid); 86 free_atid(sc, atid); 87 88 CURVNET_SET(toep->vnet); 89 INP_WLOCK(inp); 90 toep->tid = tid; 91 insert_tid(sc, tid, toep, inp->inp_vflag & INP_IPV6 ? 2 : 1); 92 if (inp->inp_flags & INP_DROPPED) { 93 94 /* socket closed by the kernel before hw told us it connected */ 95 96 send_flowc_wr(toep, NULL); 97 send_reset(sc, toep, be32toh(cpl->snd_isn)); 98 goto done; 99 } 100 101 make_established(toep, be32toh(cpl->snd_isn) - 1, 102 be32toh(cpl->rcv_isn) - 1, cpl->tcp_opt); 103 inp->inp_flowtype = M_HASHTYPE_OPAQUE; 104 inp->inp_flowid = tid; 105 106 done: 107 INP_WUNLOCK(inp); 108 CURVNET_RESTORE(); 109 return (0); 110 } 111 112 void 113 act_open_failure_cleanup(struct adapter *sc, struct toepcb *toep, u_int status) 114 { 115 struct inpcb *inp = toep->inp; 116 struct toedev *tod = &toep->td->tod; 117 struct epoch_tracker et; 118 struct tom_data *td = sc->tom_softc; 119 120 if (toep->tid >= 0) { 121 free_atid(sc, toep->tid); 122 toep->tid = -1; 123 mtx_lock(&td->toep_list_lock); 124 if (toep->flags & TPF_IN_TOEP_LIST) { 125 toep->flags &= ~TPF_IN_TOEP_LIST; 126 TAILQ_REMOVE(&td->toep_list, toep, link); 127 } 128 mtx_unlock(&td->toep_list_lock); 129 } 130 131 CURVNET_SET(toep->vnet); 132 if (status != EAGAIN) 133 NET_EPOCH_ENTER(et); 134 INP_WLOCK(inp); 135 toe_connect_failed(tod, inp, status); 136 final_cpl_received(toep); /* unlocks inp */ 137 if (status != EAGAIN) 138 NET_EPOCH_EXIT(et); 139 CURVNET_RESTORE(); 140 } 141 142 /* 143 * Active open failed. 144 */ 145 static int 146 do_act_open_rpl(struct sge_iq *iq, const struct rss_header *rss, 147 struct mbuf *m) 148 { 149 struct adapter *sc = iq->adapter; 150 const struct cpl_act_open_rpl *cpl = (const void *)(rss + 1); 151 u_int atid = G_TID_TID(G_AOPEN_ATID(be32toh(cpl->atid_status))); 152 u_int status = G_AOPEN_STATUS(be32toh(cpl->atid_status)); 153 struct toepcb *toep = lookup_atid(sc, atid); 154 int rc; 155 156 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 157 KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__)); 158 159 CTR3(KTR_CXGBE, "%s: atid %u, status %u ", __func__, atid, status); 160 161 /* Ignore negative advice */ 162 if (negative_advice(status)) 163 return (0); 164 165 if (status && act_open_has_tid(status)) 166 release_tid(sc, GET_TID(cpl), toep->ctrlq); 167 168 rc = act_open_rpl_status_to_errno(status); 169 act_open_failure_cleanup(sc, toep, rc); 170 171 return (0); 172 } 173 174 void 175 t4_init_connect_cpl_handlers(void) 176 { 177 178 t4_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish); 179 t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl, 180 CPL_COOKIE_TOM); 181 } 182 183 void 184 t4_uninit_connect_cpl_handlers(void) 185 { 186 187 t4_register_cpl_handler(CPL_ACT_ESTABLISH, NULL); 188 t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, NULL, CPL_COOKIE_TOM); 189 } 190 191 #ifdef KTR 192 #define DONT_OFFLOAD_ACTIVE_OPEN(x) do { \ 193 reason = __LINE__; \ 194 rc = (x); \ 195 goto failed; \ 196 } while (0) 197 #else 198 #define DONT_OFFLOAD_ACTIVE_OPEN(x) do { \ 199 rc = (x); \ 200 goto failed; \ 201 } while (0) 202 #endif 203 204 static inline int 205 act_open_cpl_size(struct adapter *sc, int isipv6) 206 { 207 int idx; 208 static const int sz_table[3][2] = { 209 { 210 sizeof (struct cpl_act_open_req), 211 sizeof (struct cpl_act_open_req6) 212 }, 213 { 214 sizeof (struct cpl_t5_act_open_req), 215 sizeof (struct cpl_t5_act_open_req6) 216 }, 217 { 218 sizeof (struct cpl_t6_act_open_req), 219 sizeof (struct cpl_t6_act_open_req6) 220 }, 221 }; 222 223 MPASS(chip_id(sc) >= CHELSIO_T4); 224 idx = min(chip_id(sc) - CHELSIO_T4, 2); 225 226 return (sz_table[idx][!!isipv6]); 227 } 228 229 /* 230 * active open (soconnect). 231 * 232 * State of affairs on entry: 233 * soisconnecting (so_state |= SS_ISCONNECTING) 234 * tcbinfo not locked (This has changed - used to be WLOCKed) 235 * inp WLOCKed 236 * tp->t_state = TCPS_SYN_SENT 237 * rtalloc1, RT_UNLOCK on rt. 238 */ 239 int 240 t4_connect(struct toedev *tod, struct socket *so, struct nhop_object *nh, 241 struct sockaddr *nam) 242 { 243 struct adapter *sc = tod->tod_softc; 244 struct tom_data *td; 245 struct toepcb *toep = NULL; 246 struct wrqe *wr = NULL; 247 if_t rt_ifp = nh->nh_ifp; 248 struct vi_info *vi; 249 int qid_atid, rc, isipv6; 250 struct inpcb *inp = sotoinpcb(so); 251 struct tcpcb *tp = intotcpcb(inp); 252 #ifdef KTR 253 int reason; 254 #endif 255 struct offload_settings settings; 256 struct epoch_tracker et; 257 uint16_t vid = 0xfff, pcp = 0; 258 259 INP_WLOCK_ASSERT(inp); 260 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, 261 ("%s: dest addr %p has family %u", __func__, nam, nam->sa_family)); 262 263 if (if_gettype(rt_ifp) == IFT_ETHER) 264 vi = if_getsoftc(rt_ifp); 265 else if (if_gettype(rt_ifp) == IFT_L2VLAN) { 266 if_t ifp = VLAN_TRUNKDEV(rt_ifp); 267 268 vi = if_getsoftc(ifp); 269 VLAN_TAG(rt_ifp, &vid); 270 VLAN_PCP(rt_ifp, &pcp); 271 } else if (if_gettype(rt_ifp) == IFT_IEEE8023ADLAG) 272 DONT_OFFLOAD_ACTIVE_OPEN(ENOSYS); /* XXX: implement lagg+TOE */ 273 else 274 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 275 if (sc->flags & KERN_TLS_ON) 276 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 277 278 rw_rlock(&sc->policy_lock); 279 settings = *lookup_offload_policy(sc, OPEN_TYPE_ACTIVE, NULL, 280 EVL_MAKETAG(vid, pcp, 0), inp); 281 rw_runlock(&sc->policy_lock); 282 if (!settings.offload) 283 DONT_OFFLOAD_ACTIVE_OPEN(EPERM); 284 285 toep = alloc_toepcb(vi, M_NOWAIT); 286 if (toep == NULL) 287 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 288 289 toep->tid = alloc_atid(sc, toep); 290 if (toep->tid < 0) 291 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 292 293 toep->l2te = t4_l2t_get(vi->pi, rt_ifp, 294 nh->nh_flags & NHF_GATEWAY ? &nh->gw_sa : nam); 295 if (toep->l2te == NULL) 296 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 297 298 toep->vnet = so->so_vnet; 299 init_conn_params(vi, &settings, &inp->inp_inc, so, NULL, 300 toep->l2te->idx, &toep->params); 301 init_toepcb(vi, toep); 302 303 isipv6 = nam->sa_family == AF_INET6; 304 wr = alloc_wrqe(act_open_cpl_size(sc, isipv6), toep->ctrlq); 305 if (wr == NULL) 306 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 307 308 qid_atid = V_TID_QID(toep->ofld_rxq->iq.abs_id) | V_TID_TID(toep->tid) | 309 V_TID_COOKIE(CPL_COOKIE_TOM); 310 311 if (isipv6) { 312 struct cpl_act_open_req6 *cpl = wrtod(wr); 313 struct cpl_t5_act_open_req6 *cpl5 = (void *)cpl; 314 struct cpl_t6_act_open_req6 *cpl6 = (void *)cpl; 315 316 if ((inp->inp_vflag & INP_IPV6) == 0) 317 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 318 319 toep->ce = t4_get_clip_entry(sc, &inp->in6p_laddr, true); 320 if (toep->ce == NULL) 321 DONT_OFFLOAD_ACTIVE_OPEN(ENOENT); 322 323 switch (chip_id(sc)) { 324 case CHELSIO_T4: 325 INIT_TP_WR(cpl, 0); 326 cpl->params = select_ntuple(vi, toep->l2te); 327 break; 328 case CHELSIO_T5: 329 INIT_TP_WR(cpl5, 0); 330 cpl5->iss = htobe32(tp->iss); 331 cpl5->params = select_ntuple(vi, toep->l2te); 332 break; 333 case CHELSIO_T6: 334 default: 335 INIT_TP_WR(cpl6, 0); 336 cpl6->iss = htobe32(tp->iss); 337 cpl6->params = select_ntuple(vi, toep->l2te); 338 break; 339 } 340 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 341 qid_atid)); 342 cpl->local_port = inp->inp_lport; 343 cpl->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0]; 344 cpl->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8]; 345 cpl->peer_port = inp->inp_fport; 346 cpl->peer_ip_hi = *(uint64_t *)&inp->in6p_faddr.s6_addr[0]; 347 cpl->peer_ip_lo = *(uint64_t *)&inp->in6p_faddr.s6_addr[8]; 348 cpl->opt0 = calc_options0(vi, &toep->params); 349 cpl->opt2 = calc_options2(vi, &toep->params); 350 351 CTR6(KTR_CXGBE, 352 "%s: atid %u, toep %p, inp %p, opt0 %#016lx, opt2 %#08x", 353 __func__, toep->tid, toep, inp, be64toh(cpl->opt0), 354 be32toh(cpl->opt2)); 355 } else { 356 struct cpl_act_open_req *cpl = wrtod(wr); 357 struct cpl_t5_act_open_req *cpl5 = (void *)cpl; 358 struct cpl_t6_act_open_req *cpl6 = (void *)cpl; 359 360 switch (chip_id(sc)) { 361 case CHELSIO_T4: 362 INIT_TP_WR(cpl, 0); 363 cpl->params = select_ntuple(vi, toep->l2te); 364 break; 365 case CHELSIO_T5: 366 INIT_TP_WR(cpl5, 0); 367 cpl5->iss = htobe32(tp->iss); 368 cpl5->params = select_ntuple(vi, toep->l2te); 369 break; 370 case CHELSIO_T6: 371 default: 372 INIT_TP_WR(cpl6, 0); 373 cpl6->iss = htobe32(tp->iss); 374 cpl6->params = select_ntuple(vi, toep->l2te); 375 break; 376 } 377 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 378 qid_atid)); 379 inp_4tuple_get(inp, &cpl->local_ip, &cpl->local_port, 380 &cpl->peer_ip, &cpl->peer_port); 381 cpl->opt0 = calc_options0(vi, &toep->params); 382 cpl->opt2 = calc_options2(vi, &toep->params); 383 384 CTR6(KTR_CXGBE, 385 "%s: atid %u, toep %p, inp %p, opt0 %#016lx, opt2 %#08x", 386 __func__, toep->tid, toep, inp, be64toh(cpl->opt0), 387 be32toh(cpl->opt2)); 388 } 389 390 offload_socket(so, toep); 391 /* Add the TOE PCB to the active list */ 392 td = toep->td; 393 mtx_lock(&td->toep_list_lock); 394 TAILQ_INSERT_TAIL(&td->toep_list, toep, link); 395 toep->flags |= TPF_IN_TOEP_LIST; 396 mtx_unlock(&td->toep_list_lock); 397 NET_EPOCH_ENTER(et); 398 rc = t4_l2t_send(sc, wr, toep->l2te); 399 NET_EPOCH_EXIT(et); 400 if (rc == 0) { 401 toep->flags |= TPF_CPL_PENDING; 402 return (0); 403 } 404 405 undo_offload_socket(so); 406 #if defined(KTR) 407 reason = __LINE__; 408 #endif 409 failed: 410 CTR3(KTR_CXGBE, "%s: not offloading (%d), rc %d", __func__, reason, rc); 411 412 if (wr) 413 free_wrqe(wr); 414 415 if (toep) { 416 if (toep->tid >= 0) 417 free_atid(sc, toep->tid); 418 if (toep->l2te) 419 t4_l2t_release(toep->l2te); 420 if (toep->ce) 421 t4_release_clip_entry(sc, toep->ce); 422 free_toepcb(toep); 423 } 424 425 return (rc); 426 } 427 #endif 428