1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 32 33 #include "opt_inet.h" 34 #include "opt_inet6.h" 35 36 #ifdef TCP_OFFLOAD 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/ktr.h> 41 #include <sys/module.h> 42 #include <sys/protosw.h> 43 #include <sys/domain.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/sysctl.h> 47 #include <net/ethernet.h> 48 #include <net/if.h> 49 #include <net/if_types.h> 50 #include <net/if_vlan_var.h> 51 #include <net/route.h> 52 #include <net/route/nhop.h> 53 #include <netinet/in.h> 54 #include <netinet/in_pcb.h> 55 #include <netinet/ip.h> 56 #define TCPSTATES 57 #include <netinet/tcp_fsm.h> 58 #include <netinet/tcp_var.h> 59 #include <netinet/toecore.h> 60 #include <netinet/cc/cc.h> 61 62 #include "common/common.h" 63 #include "common/t4_msg.h" 64 #include "common/t4_regs.h" 65 #include "common/t4_regs_values.h" 66 #include "t4_clip.h" 67 #include "tom/t4_tom_l2t.h" 68 #include "tom/t4_tom.h" 69 70 /* 71 * Active open succeeded. 72 */ 73 static int 74 do_act_establish(struct sge_iq *iq, const struct rss_header *rss, 75 struct mbuf *m) 76 { 77 struct adapter *sc = iq->adapter; 78 const struct cpl_act_establish *cpl = (const void *)(rss + 1); 79 u_int tid = GET_TID(cpl); 80 u_int atid = G_TID_TID(ntohl(cpl->tos_atid)); 81 struct toepcb *toep = lookup_atid(sc, atid); 82 struct inpcb *inp = toep->inp; 83 84 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 85 KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__)); 86 87 CTR3(KTR_CXGBE, "%s: atid %u, tid %u", __func__, atid, tid); 88 free_atid(sc, atid); 89 90 CURVNET_SET(toep->vnet); 91 INP_WLOCK(inp); 92 toep->tid = tid; 93 insert_tid(sc, tid, toep, inp->inp_vflag & INP_IPV6 ? 2 : 1); 94 if (inp->inp_flags & INP_DROPPED) { 95 96 /* socket closed by the kernel before hw told us it connected */ 97 98 send_flowc_wr(toep, NULL); 99 send_reset(sc, toep, be32toh(cpl->snd_isn)); 100 goto done; 101 } 102 103 make_established(toep, be32toh(cpl->snd_isn) - 1, 104 be32toh(cpl->rcv_isn) - 1, cpl->tcp_opt); 105 inp->inp_flowtype = M_HASHTYPE_OPAQUE; 106 inp->inp_flowid = tid; 107 108 if (ulp_mode(toep) == ULP_MODE_TLS) 109 tls_establish(toep); 110 111 done: 112 INP_WUNLOCK(inp); 113 CURVNET_RESTORE(); 114 return (0); 115 } 116 117 void 118 act_open_failure_cleanup(struct adapter *sc, u_int atid, u_int status) 119 { 120 struct toepcb *toep = lookup_atid(sc, atid); 121 struct inpcb *inp = toep->inp; 122 struct toedev *tod = &toep->td->tod; 123 struct epoch_tracker et; 124 125 free_atid(sc, atid); 126 toep->tid = -1; 127 128 CURVNET_SET(toep->vnet); 129 if (status != EAGAIN) 130 NET_EPOCH_ENTER(et); 131 INP_WLOCK(inp); 132 toe_connect_failed(tod, inp, status); 133 final_cpl_received(toep); /* unlocks inp */ 134 if (status != EAGAIN) 135 NET_EPOCH_EXIT(et); 136 CURVNET_RESTORE(); 137 } 138 139 /* 140 * Active open failed. 141 */ 142 static int 143 do_act_open_rpl(struct sge_iq *iq, const struct rss_header *rss, 144 struct mbuf *m) 145 { 146 struct adapter *sc = iq->adapter; 147 const struct cpl_act_open_rpl *cpl = (const void *)(rss + 1); 148 u_int atid = G_TID_TID(G_AOPEN_ATID(be32toh(cpl->atid_status))); 149 u_int status = G_AOPEN_STATUS(be32toh(cpl->atid_status)); 150 struct toepcb *toep = lookup_atid(sc, atid); 151 int rc; 152 153 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 154 KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__)); 155 156 CTR3(KTR_CXGBE, "%s: atid %u, status %u ", __func__, atid, status); 157 158 /* Ignore negative advice */ 159 if (negative_advice(status)) 160 return (0); 161 162 if (status && act_open_has_tid(status)) 163 release_tid(sc, GET_TID(cpl), toep->ctrlq); 164 165 rc = act_open_rpl_status_to_errno(status); 166 act_open_failure_cleanup(sc, atid, rc); 167 168 return (0); 169 } 170 171 void 172 t4_init_connect_cpl_handlers(void) 173 { 174 175 t4_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish); 176 t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl, 177 CPL_COOKIE_TOM); 178 } 179 180 void 181 t4_uninit_connect_cpl_handlers(void) 182 { 183 184 t4_register_cpl_handler(CPL_ACT_ESTABLISH, NULL); 185 t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, NULL, CPL_COOKIE_TOM); 186 } 187 188 #define DONT_OFFLOAD_ACTIVE_OPEN(x) do { \ 189 reason = __LINE__; \ 190 rc = (x); \ 191 goto failed; \ 192 } while (0) 193 194 static inline int 195 act_open_cpl_size(struct adapter *sc, int isipv6) 196 { 197 int idx; 198 static const int sz_table[3][2] = { 199 { 200 sizeof (struct cpl_act_open_req), 201 sizeof (struct cpl_act_open_req6) 202 }, 203 { 204 sizeof (struct cpl_t5_act_open_req), 205 sizeof (struct cpl_t5_act_open_req6) 206 }, 207 { 208 sizeof (struct cpl_t6_act_open_req), 209 sizeof (struct cpl_t6_act_open_req6) 210 }, 211 }; 212 213 MPASS(chip_id(sc) >= CHELSIO_T4); 214 idx = min(chip_id(sc) - CHELSIO_T4, 2); 215 216 return (sz_table[idx][!!isipv6]); 217 } 218 219 /* 220 * active open (soconnect). 221 * 222 * State of affairs on entry: 223 * soisconnecting (so_state |= SS_ISCONNECTING) 224 * tcbinfo not locked (This has changed - used to be WLOCKed) 225 * inp WLOCKed 226 * tp->t_state = TCPS_SYN_SENT 227 * rtalloc1, RT_UNLOCK on rt. 228 */ 229 int 230 t4_connect(struct toedev *tod, struct socket *so, struct nhop_object *nh, 231 struct sockaddr *nam) 232 { 233 struct adapter *sc = tod->tod_softc; 234 struct toepcb *toep = NULL; 235 struct wrqe *wr = NULL; 236 struct ifnet *rt_ifp = nh->nh_ifp; 237 struct vi_info *vi; 238 int qid_atid, rc, isipv6; 239 struct inpcb *inp = sotoinpcb(so); 240 struct tcpcb *tp = intotcpcb(inp); 241 int reason; 242 struct offload_settings settings; 243 struct epoch_tracker et; 244 uint16_t vid = 0xfff, pcp = 0; 245 246 INP_WLOCK_ASSERT(inp); 247 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, 248 ("%s: dest addr %p has family %u", __func__, nam, nam->sa_family)); 249 250 if (rt_ifp->if_type == IFT_ETHER) 251 vi = rt_ifp->if_softc; 252 else if (rt_ifp->if_type == IFT_L2VLAN) { 253 struct ifnet *ifp = VLAN_TRUNKDEV(rt_ifp); 254 255 vi = ifp->if_softc; 256 VLAN_TAG(rt_ifp, &vid); 257 VLAN_PCP(rt_ifp, &pcp); 258 } else if (rt_ifp->if_type == IFT_IEEE8023ADLAG) 259 DONT_OFFLOAD_ACTIVE_OPEN(ENOSYS); /* XXX: implement lagg+TOE */ 260 else 261 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 262 if (sc->flags & KERN_TLS_OK) 263 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 264 265 rw_rlock(&sc->policy_lock); 266 settings = *lookup_offload_policy(sc, OPEN_TYPE_ACTIVE, NULL, 267 EVL_MAKETAG(vid, pcp, 0), inp); 268 rw_runlock(&sc->policy_lock); 269 if (!settings.offload) 270 DONT_OFFLOAD_ACTIVE_OPEN(EPERM); 271 272 toep = alloc_toepcb(vi, M_NOWAIT); 273 if (toep == NULL) 274 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 275 276 toep->tid = alloc_atid(sc, toep); 277 if (toep->tid < 0) 278 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 279 280 toep->l2te = t4_l2t_get(vi->pi, rt_ifp, 281 nh->nh_flags & NHF_GATEWAY ? &nh->gw_sa : nam); 282 if (toep->l2te == NULL) 283 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 284 285 toep->vnet = so->so_vnet; 286 init_conn_params(vi, &settings, &inp->inp_inc, so, NULL, 287 toep->l2te->idx, &toep->params); 288 init_toepcb(vi, toep); 289 290 isipv6 = nam->sa_family == AF_INET6; 291 wr = alloc_wrqe(act_open_cpl_size(sc, isipv6), toep->ctrlq); 292 if (wr == NULL) 293 DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM); 294 295 qid_atid = V_TID_QID(toep->ofld_rxq->iq.abs_id) | V_TID_TID(toep->tid) | 296 V_TID_COOKIE(CPL_COOKIE_TOM); 297 298 if (isipv6) { 299 struct cpl_act_open_req6 *cpl = wrtod(wr); 300 struct cpl_t5_act_open_req6 *cpl5 = (void *)cpl; 301 struct cpl_t6_act_open_req6 *cpl6 = (void *)cpl; 302 303 if ((inp->inp_vflag & INP_IPV6) == 0) 304 DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP); 305 306 toep->ce = t4_hold_lip(sc, &inp->in6p_laddr, NULL); 307 if (toep->ce == NULL) 308 DONT_OFFLOAD_ACTIVE_OPEN(ENOENT); 309 310 switch (chip_id(sc)) { 311 case CHELSIO_T4: 312 INIT_TP_WR(cpl, 0); 313 cpl->params = select_ntuple(vi, toep->l2te); 314 break; 315 case CHELSIO_T5: 316 INIT_TP_WR(cpl5, 0); 317 cpl5->iss = htobe32(tp->iss); 318 cpl5->params = select_ntuple(vi, toep->l2te); 319 break; 320 case CHELSIO_T6: 321 default: 322 INIT_TP_WR(cpl6, 0); 323 cpl6->iss = htobe32(tp->iss); 324 cpl6->params = select_ntuple(vi, toep->l2te); 325 break; 326 } 327 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 328 qid_atid)); 329 cpl->local_port = inp->inp_lport; 330 cpl->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0]; 331 cpl->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8]; 332 cpl->peer_port = inp->inp_fport; 333 cpl->peer_ip_hi = *(uint64_t *)&inp->in6p_faddr.s6_addr[0]; 334 cpl->peer_ip_lo = *(uint64_t *)&inp->in6p_faddr.s6_addr[8]; 335 cpl->opt0 = calc_options0(vi, &toep->params); 336 cpl->opt2 = calc_options2(vi, &toep->params); 337 338 CTR6(KTR_CXGBE, 339 "%s: atid %u, toep %p, inp %p, opt0 %#016lx, opt2 %#08x", 340 __func__, toep->tid, toep, inp, be64toh(cpl->opt0), 341 be32toh(cpl->opt2)); 342 } else { 343 struct cpl_act_open_req *cpl = wrtod(wr); 344 struct cpl_t5_act_open_req *cpl5 = (void *)cpl; 345 struct cpl_t6_act_open_req *cpl6 = (void *)cpl; 346 347 switch (chip_id(sc)) { 348 case CHELSIO_T4: 349 INIT_TP_WR(cpl, 0); 350 cpl->params = select_ntuple(vi, toep->l2te); 351 break; 352 case CHELSIO_T5: 353 INIT_TP_WR(cpl5, 0); 354 cpl5->iss = htobe32(tp->iss); 355 cpl5->params = select_ntuple(vi, toep->l2te); 356 break; 357 case CHELSIO_T6: 358 default: 359 INIT_TP_WR(cpl6, 0); 360 cpl6->iss = htobe32(tp->iss); 361 cpl6->params = select_ntuple(vi, toep->l2te); 362 break; 363 } 364 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 365 qid_atid)); 366 inp_4tuple_get(inp, &cpl->local_ip, &cpl->local_port, 367 &cpl->peer_ip, &cpl->peer_port); 368 cpl->opt0 = calc_options0(vi, &toep->params); 369 cpl->opt2 = calc_options2(vi, &toep->params); 370 371 CTR6(KTR_CXGBE, 372 "%s: atid %u, toep %p, inp %p, opt0 %#016lx, opt2 %#08x", 373 __func__, toep->tid, toep, inp, be64toh(cpl->opt0), 374 be32toh(cpl->opt2)); 375 } 376 377 offload_socket(so, toep); 378 NET_EPOCH_ENTER(et); 379 rc = t4_l2t_send(sc, wr, toep->l2te); 380 NET_EPOCH_EXIT(et); 381 if (rc == 0) { 382 toep->flags |= TPF_CPL_PENDING; 383 return (0); 384 } 385 386 undo_offload_socket(so); 387 reason = __LINE__; 388 failed: 389 CTR3(KTR_CXGBE, "%s: not offloading (%d), rc %d", __func__, reason, rc); 390 391 if (wr) 392 free_wrqe(wr); 393 394 if (toep) { 395 if (toep->tid >= 0) 396 free_atid(sc, toep->tid); 397 if (toep->l2te) 398 t4_l2t_release(toep->l2te); 399 if (toep->ce) 400 t4_release_lip(sc, toep->ce); 401 free_toepcb(toep); 402 } 403 404 return (rc); 405 } 406 #endif 407