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