1 /*- 2 * Copyright (c) 2014 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 34 #ifdef DEV_NETMAP 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/eventhandler.h> 38 #include <sys/lock.h> 39 #include <sys/mbuf.h> 40 #include <sys/module.h> 41 #include <sys/selinfo.h> 42 #include <sys/socket.h> 43 #include <sys/sockio.h> 44 #include <machine/bus.h> 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_media.h> 48 #include <net/if_var.h> 49 #include <net/if_clone.h> 50 #include <net/if_types.h> 51 #include <net/netmap.h> 52 #include <dev/netmap/netmap_kern.h> 53 54 #include "common/common.h" 55 #include "common/t4_regs.h" 56 #include "common/t4_regs_values.h" 57 58 extern int fl_pad; /* XXXNM */ 59 extern int spg_len; /* XXXNM */ 60 extern int fl_pktshift; /* XXXNM */ 61 62 SYSCTL_NODE(_hw, OID_AUTO, cxgbe, CTLFLAG_RD, 0, "cxgbe netmap parameters"); 63 64 /* 65 * 0 = normal netmap rx 66 * 1 = black hole 67 * 2 = supermassive black hole (buffer packing enabled) 68 */ 69 int black_hole = 0; 70 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_black_hole, CTLFLAG_RDTUN, &black_hole, 0, 71 "Sink incoming packets."); 72 73 int rx_ndesc = 256; 74 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_rx_ndesc, CTLFLAG_RWTUN, 75 &rx_ndesc, 0, "# of rx descriptors after which the hw cidx is updated."); 76 77 int holdoff_tmr_idx = 2; 78 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_holdoff_tmr_idx, CTLFLAG_RWTUN, 79 &holdoff_tmr_idx, 0, "Holdoff timer index for netmap rx queues."); 80 81 /* 82 * Congestion drops. 83 * -1: no congestion feedback (not recommended). 84 * 0: backpressure the channel instead of dropping packets right away. 85 * 1: no backpressure, drop packets for the congested queue immediately. 86 */ 87 static int nm_cong_drop = 1; 88 TUNABLE_INT("hw.cxgbe.nm_cong_drop", &nm_cong_drop); 89 90 /* netmap ifnet routines */ 91 static void cxgbe_nm_init(void *); 92 static int cxgbe_nm_ioctl(struct ifnet *, unsigned long, caddr_t); 93 static int cxgbe_nm_transmit(struct ifnet *, struct mbuf *); 94 static void cxgbe_nm_qflush(struct ifnet *); 95 96 static int cxgbe_nm_init_synchronized(struct vi_info *); 97 static int cxgbe_nm_uninit_synchronized(struct vi_info *); 98 99 /* T4 netmap VI (ncxgbe) interface */ 100 static int ncxgbe_probe(device_t); 101 static int ncxgbe_attach(device_t); 102 static int ncxgbe_detach(device_t); 103 static device_method_t ncxgbe_methods[] = { 104 DEVMETHOD(device_probe, ncxgbe_probe), 105 DEVMETHOD(device_attach, ncxgbe_attach), 106 DEVMETHOD(device_detach, ncxgbe_detach), 107 { 0, 0 } 108 }; 109 static driver_t ncxgbe_driver = { 110 "ncxgbe", 111 ncxgbe_methods, 112 sizeof(struct vi_info) 113 }; 114 115 /* T5 netmap VI (ncxl) interface */ 116 static driver_t ncxl_driver = { 117 "ncxl", 118 ncxgbe_methods, 119 sizeof(struct vi_info) 120 }; 121 122 static void 123 cxgbe_nm_init(void *arg) 124 { 125 struct vi_info *vi = arg; 126 struct adapter *sc = vi->pi->adapter; 127 128 if (begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nminit") != 0) 129 return; 130 cxgbe_nm_init_synchronized(vi); 131 end_synchronized_op(sc, 0); 132 133 return; 134 } 135 136 static int 137 cxgbe_nm_init_synchronized(struct vi_info *vi) 138 { 139 struct adapter *sc = vi->pi->adapter; 140 struct ifnet *ifp = vi->ifp; 141 int rc = 0; 142 143 ASSERT_SYNCHRONIZED_OP(sc); 144 145 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 146 return (0); /* already running */ 147 148 if (!(sc->flags & FULL_INIT_DONE) && 149 ((rc = adapter_full_init(sc)) != 0)) 150 return (rc); /* error message displayed already */ 151 152 if (!(vi->flags & VI_INIT_DONE) && 153 ((rc = vi_full_init(vi)) != 0)) 154 return (rc); /* error message displayed already */ 155 156 rc = update_mac_settings(ifp, XGMAC_ALL); 157 if (rc) 158 return (rc); /* error message displayed already */ 159 160 ifp->if_drv_flags |= IFF_DRV_RUNNING; 161 callout_reset(&vi->tick, hz, vi_tick, vi); 162 163 return (rc); 164 } 165 166 static int 167 cxgbe_nm_uninit_synchronized(struct vi_info *vi) 168 { 169 #ifdef INVARIANTS 170 struct adapter *sc = vi->pi->adapter; 171 #endif 172 struct ifnet *ifp = vi->ifp; 173 174 ASSERT_SYNCHRONIZED_OP(sc); 175 176 callout_stop(&vi->tick); 177 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 178 179 return (0); 180 } 181 182 static int 183 cxgbe_nm_ioctl(struct ifnet *ifp, unsigned long cmd, caddr_t data) 184 { 185 int rc = 0, mtu, flags; 186 struct vi_info *vi = ifp->if_softc; 187 struct adapter *sc = vi->pi->adapter; 188 struct ifreq *ifr = (struct ifreq *)data; 189 uint32_t mask; 190 191 MPASS(vi->ifp == ifp); 192 193 switch (cmd) { 194 case SIOCSIFMTU: 195 mtu = ifr->ifr_mtu; 196 if ((mtu < ETHERMIN) || (mtu > ETHERMTU_JUMBO)) 197 return (EINVAL); 198 199 rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nmtu"); 200 if (rc) 201 return (rc); 202 ifp->if_mtu = mtu; 203 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 204 rc = update_mac_settings(ifp, XGMAC_MTU); 205 end_synchronized_op(sc, 0); 206 break; 207 208 case SIOCSIFFLAGS: 209 rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nflg"); 210 if (rc) 211 return (rc); 212 213 if (ifp->if_flags & IFF_UP) { 214 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 215 flags = vi->if_flags; 216 if ((ifp->if_flags ^ flags) & 217 (IFF_PROMISC | IFF_ALLMULTI)) { 218 rc = update_mac_settings(ifp, 219 XGMAC_PROMISC | XGMAC_ALLMULTI); 220 } 221 } else 222 rc = cxgbe_nm_init_synchronized(vi); 223 vi->if_flags = ifp->if_flags; 224 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING) 225 rc = cxgbe_nm_uninit_synchronized(vi); 226 end_synchronized_op(sc, 0); 227 break; 228 229 case SIOCADDMULTI: 230 case SIOCDELMULTI: /* these two are called with a mutex held :-( */ 231 rc = begin_synchronized_op(sc, vi, HOLD_LOCK, "t4nmulti"); 232 if (rc) 233 return (rc); 234 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 235 rc = update_mac_settings(ifp, XGMAC_MCADDRS); 236 end_synchronized_op(sc, LOCK_HELD); 237 break; 238 239 case SIOCSIFCAP: 240 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 241 if (mask & IFCAP_TXCSUM) { 242 ifp->if_capenable ^= IFCAP_TXCSUM; 243 ifp->if_hwassist ^= (CSUM_TCP | CSUM_UDP | CSUM_IP); 244 } 245 if (mask & IFCAP_TXCSUM_IPV6) { 246 ifp->if_capenable ^= IFCAP_TXCSUM_IPV6; 247 ifp->if_hwassist ^= (CSUM_UDP_IPV6 | CSUM_TCP_IPV6); 248 } 249 if (mask & IFCAP_RXCSUM) 250 ifp->if_capenable ^= IFCAP_RXCSUM; 251 if (mask & IFCAP_RXCSUM_IPV6) 252 ifp->if_capenable ^= IFCAP_RXCSUM_IPV6; 253 break; 254 255 case SIOCSIFMEDIA: 256 case SIOCGIFMEDIA: 257 ifmedia_ioctl(ifp, ifr, &vi->media, cmd); 258 break; 259 260 default: 261 rc = ether_ioctl(ifp, cmd, data); 262 } 263 264 return (rc); 265 } 266 267 static int 268 cxgbe_nm_transmit(struct ifnet *ifp, struct mbuf *m) 269 { 270 271 m_freem(m); 272 return (0); 273 } 274 275 static void 276 cxgbe_nm_qflush(struct ifnet *ifp) 277 { 278 279 return; 280 } 281 282 static int 283 alloc_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq, int cong) 284 { 285 int rc, cntxt_id, i; 286 __be32 v; 287 struct adapter *sc = vi->pi->adapter; 288 struct netmap_adapter *na = NA(vi->ifp); 289 struct fw_iq_cmd c; 290 291 MPASS(na != NULL); 292 MPASS(nm_rxq->iq_desc != NULL); 293 MPASS(nm_rxq->fl_desc != NULL); 294 295 bzero(nm_rxq->iq_desc, vi->qsize_rxq * IQ_ESIZE); 296 bzero(nm_rxq->fl_desc, na->num_rx_desc * EQ_ESIZE + spg_len); 297 298 bzero(&c, sizeof(c)); 299 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 300 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 301 V_FW_IQ_CMD_VFN(0)); 302 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 303 FW_LEN16(c)); 304 if (vi->flags & INTR_RXQ) { 305 KASSERT(nm_rxq->intr_idx < sc->intr_count, 306 ("%s: invalid direct intr_idx %d", __func__, 307 nm_rxq->intr_idx)); 308 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx); 309 } else { 310 CXGBE_UNIMPLEMENTED(__func__); /* XXXNM: needs review */ 311 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx) | 312 F_FW_IQ_CMD_IQANDST; 313 } 314 c.type_to_iqandstindex = htobe32(v | 315 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 316 V_FW_IQ_CMD_VIID(vi->viid) | 317 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 318 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(vi->pi->tx_chan) | 319 F_FW_IQ_CMD_IQGTSMODE | 320 V_FW_IQ_CMD_IQINTCNTTHRESH(0) | 321 V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4)); 322 c.iqsize = htobe16(vi->qsize_rxq); 323 c.iqaddr = htobe64(nm_rxq->iq_ba); 324 if (cong >= 0) { 325 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN | 326 V_FW_IQ_CMD_FL0CNGCHMAP(cong) | F_FW_IQ_CMD_FL0CONGCIF | 327 F_FW_IQ_CMD_FL0CONGEN); 328 } 329 c.iqns_to_fl0congen |= 330 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 331 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 332 (fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0) | 333 (black_hole == 2 ? F_FW_IQ_CMD_FL0PACKEN : 0)); 334 c.fl0dcaen_to_fl0cidxfthresh = 335 htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_128B) | 336 V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B)); 337 c.fl0size = htobe16(na->num_rx_desc / 8 + spg_len / EQ_ESIZE); 338 c.fl0addr = htobe64(nm_rxq->fl_ba); 339 340 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 341 if (rc != 0) { 342 device_printf(sc->dev, 343 "failed to create netmap ingress queue: %d\n", rc); 344 return (rc); 345 } 346 347 nm_rxq->iq_cidx = 0; 348 MPASS(nm_rxq->iq_sidx == vi->qsize_rxq - spg_len / IQ_ESIZE); 349 nm_rxq->iq_gen = F_RSPD_GEN; 350 nm_rxq->iq_cntxt_id = be16toh(c.iqid); 351 nm_rxq->iq_abs_id = be16toh(c.physiqid); 352 cntxt_id = nm_rxq->iq_cntxt_id - sc->sge.iq_start; 353 if (cntxt_id >= sc->sge.niq) { 354 panic ("%s: nm_rxq->iq_cntxt_id (%d) more than the max (%d)", 355 __func__, cntxt_id, sc->sge.niq - 1); 356 } 357 sc->sge.iqmap[cntxt_id] = (void *)nm_rxq; 358 359 nm_rxq->fl_cntxt_id = be16toh(c.fl0id); 360 nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0; 361 MPASS(nm_rxq->fl_sidx == na->num_rx_desc); 362 cntxt_id = nm_rxq->fl_cntxt_id - sc->sge.eq_start; 363 if (cntxt_id >= sc->sge.neq) { 364 panic("%s: nm_rxq->fl_cntxt_id (%d) more than the max (%d)", 365 __func__, cntxt_id, sc->sge.neq - 1); 366 } 367 sc->sge.eqmap[cntxt_id] = (void *)nm_rxq; 368 369 nm_rxq->fl_db_val = V_QID(nm_rxq->fl_cntxt_id) | 370 sc->chip_params->sge_fl_db; 371 372 if (is_t5(sc) && cong >= 0) { 373 uint32_t param, val; 374 375 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 376 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 377 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); 378 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 379 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 380 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); 381 if (cong == 0) 382 val = 1 << 19; 383 else { 384 val = 2 << 19; 385 for (i = 0; i < 4; i++) { 386 if (cong & (1 << i)) 387 val |= 1 << (i << 2); 388 } 389 } 390 391 rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val); 392 if (rc != 0) { 393 /* report error but carry on */ 394 device_printf(sc->dev, 395 "failed to set congestion manager context for " 396 "ingress queue %d: %d\n", nm_rxq->iq_cntxt_id, rc); 397 } 398 } 399 400 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 401 V_INGRESSQID(nm_rxq->iq_cntxt_id) | 402 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx))); 403 404 return (rc); 405 } 406 407 static int 408 free_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq) 409 { 410 struct adapter *sc = vi->pi->adapter; 411 int rc; 412 413 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, FW_IQ_TYPE_FL_INT_CAP, 414 nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, 0xffff); 415 if (rc != 0) 416 device_printf(sc->dev, "%s: failed for iq %d, fl %d: %d\n", 417 __func__, nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, rc); 418 return (rc); 419 } 420 421 static int 422 alloc_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq) 423 { 424 int rc, cntxt_id; 425 size_t len; 426 struct adapter *sc = vi->pi->adapter; 427 struct netmap_adapter *na = NA(vi->ifp); 428 struct fw_eq_eth_cmd c; 429 430 MPASS(na != NULL); 431 MPASS(nm_txq->desc != NULL); 432 433 len = na->num_tx_desc * EQ_ESIZE + spg_len; 434 bzero(nm_txq->desc, len); 435 436 bzero(&c, sizeof(c)); 437 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 438 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 439 V_FW_EQ_ETH_CMD_VFN(0)); 440 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 441 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 442 c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE | 443 F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(vi->viid)); 444 c.fetchszm_to_iqid = 445 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 446 V_FW_EQ_ETH_CMD_PCIECHN(vi->pi->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 447 V_FW_EQ_ETH_CMD_IQID(sc->sge.nm_rxq[nm_txq->iqidx].iq_cntxt_id)); 448 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 449 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 450 V_FW_EQ_ETH_CMD_EQSIZE(len / EQ_ESIZE)); 451 c.eqaddr = htobe64(nm_txq->ba); 452 453 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 454 if (rc != 0) { 455 device_printf(vi->dev, 456 "failed to create netmap egress queue: %d\n", rc); 457 return (rc); 458 } 459 460 nm_txq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 461 cntxt_id = nm_txq->cntxt_id - sc->sge.eq_start; 462 if (cntxt_id >= sc->sge.neq) 463 panic("%s: nm_txq->cntxt_id (%d) more than the max (%d)", __func__, 464 cntxt_id, sc->sge.neq - 1); 465 sc->sge.eqmap[cntxt_id] = (void *)nm_txq; 466 467 nm_txq->pidx = nm_txq->cidx = 0; 468 MPASS(nm_txq->sidx == na->num_tx_desc); 469 nm_txq->equiqidx = nm_txq->equeqidx = nm_txq->dbidx = 0; 470 471 nm_txq->doorbells = sc->doorbells; 472 if (isset(&nm_txq->doorbells, DOORBELL_UDB) || 473 isset(&nm_txq->doorbells, DOORBELL_UDBWC) || 474 isset(&nm_txq->doorbells, DOORBELL_WCWR)) { 475 uint32_t s_qpp = sc->sge.eq_s_qpp; 476 uint32_t mask = (1 << s_qpp) - 1; 477 volatile uint8_t *udb; 478 479 udb = sc->udbs_base + UDBS_DB_OFFSET; 480 udb += (nm_txq->cntxt_id >> s_qpp) << PAGE_SHIFT; 481 nm_txq->udb_qid = nm_txq->cntxt_id & mask; 482 if (nm_txq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE) 483 clrbit(&nm_txq->doorbells, DOORBELL_WCWR); 484 else { 485 udb += nm_txq->udb_qid << UDBS_SEG_SHIFT; 486 nm_txq->udb_qid = 0; 487 } 488 nm_txq->udb = (volatile void *)udb; 489 } 490 491 return (rc); 492 } 493 494 static int 495 free_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq) 496 { 497 struct adapter *sc = vi->pi->adapter; 498 int rc; 499 500 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, nm_txq->cntxt_id); 501 if (rc != 0) 502 device_printf(sc->dev, "%s: failed for eq %d: %d\n", __func__, 503 nm_txq->cntxt_id, rc); 504 return (rc); 505 } 506 507 static int 508 cxgbe_netmap_on(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp, 509 struct netmap_adapter *na) 510 { 511 struct netmap_slot *slot; 512 struct sge_nm_rxq *nm_rxq; 513 struct sge_nm_txq *nm_txq; 514 int rc, i, j, hwidx; 515 struct hw_buf_info *hwb; 516 uint16_t *rss; 517 518 ASSERT_SYNCHRONIZED_OP(sc); 519 520 if ((vi->flags & VI_INIT_DONE) == 0 || 521 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 522 return (EAGAIN); 523 524 hwb = &sc->sge.hw_buf_info[0]; 525 for (i = 0; i < SGE_FLBUF_SIZES; i++, hwb++) { 526 if (hwb->size == NETMAP_BUF_SIZE(na)) 527 break; 528 } 529 if (i >= SGE_FLBUF_SIZES) { 530 if_printf(ifp, "no hwidx for netmap buffer size %d.\n", 531 NETMAP_BUF_SIZE(na)); 532 return (ENXIO); 533 } 534 hwidx = i; 535 536 /* Must set caps before calling netmap_reset */ 537 nm_set_native_flags(na); 538 539 for_each_nm_rxq(vi, i, nm_rxq) { 540 alloc_nm_rxq_hwq(vi, nm_rxq, tnl_cong(vi->pi, nm_cong_drop)); 541 nm_rxq->fl_hwidx = hwidx; 542 slot = netmap_reset(na, NR_RX, i, 0); 543 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 544 545 /* We deal with 8 bufs at a time */ 546 MPASS((na->num_rx_desc & 7) == 0); 547 MPASS(na->num_rx_desc == nm_rxq->fl_sidx); 548 for (j = 0; j < nm_rxq->fl_sidx; j++) { 549 uint64_t ba; 550 551 PNMB(na, &slot[j], &ba); 552 MPASS(ba != 0); 553 nm_rxq->fl_desc[j] = htobe64(ba | hwidx); 554 } 555 j = nm_rxq->fl_pidx = nm_rxq->fl_sidx - 8; 556 MPASS((j & 7) == 0); 557 j /= 8; /* driver pidx to hardware pidx */ 558 wmb(); 559 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 560 nm_rxq->fl_db_val | V_PIDX(j)); 561 } 562 563 for_each_nm_txq(vi, i, nm_txq) { 564 alloc_nm_txq_hwq(vi, nm_txq); 565 slot = netmap_reset(na, NR_TX, i, 0); 566 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 567 } 568 569 rss = malloc(vi->rss_size * sizeof (*rss), M_CXGBE, M_ZERO | 570 M_WAITOK); 571 for (i = 0; i < vi->rss_size;) { 572 for_each_nm_rxq(vi, j, nm_rxq) { 573 rss[i++] = nm_rxq->iq_abs_id; 574 if (i == vi->rss_size) 575 break; 576 } 577 } 578 rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size, 579 rss, vi->rss_size); 580 if (rc != 0) 581 if_printf(ifp, "netmap rss_config failed: %d\n", rc); 582 free(rss, M_CXGBE); 583 584 rc = -t4_enable_vi(sc, sc->mbox, vi->viid, true, true); 585 if (rc != 0) 586 if_printf(ifp, "netmap enable_vi failed: %d\n", rc); 587 588 return (rc); 589 } 590 591 static int 592 cxgbe_netmap_off(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp, 593 struct netmap_adapter *na) 594 { 595 int rc, i; 596 struct sge_nm_txq *nm_txq; 597 struct sge_nm_rxq *nm_rxq; 598 599 ASSERT_SYNCHRONIZED_OP(sc); 600 601 if ((vi->flags & VI_INIT_DONE) == 0) 602 return (0); 603 604 rc = -t4_enable_vi(sc, sc->mbox, vi->viid, false, false); 605 if (rc != 0) 606 if_printf(ifp, "netmap disable_vi failed: %d\n", rc); 607 nm_clear_native_flags(na); 608 609 for_each_nm_txq(vi, i, nm_txq) { 610 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx]; 611 612 /* Wait for hw pidx to catch up ... */ 613 while (be16toh(nm_txq->pidx) != spg->pidx) 614 pause("nmpidx", 1); 615 616 /* ... and then for the cidx. */ 617 while (spg->pidx != spg->cidx) 618 pause("nmcidx", 1); 619 620 free_nm_txq_hwq(vi, nm_txq); 621 } 622 for_each_nm_rxq(vi, i, nm_rxq) { 623 free_nm_rxq_hwq(vi, nm_rxq); 624 } 625 626 return (rc); 627 } 628 629 static int 630 cxgbe_netmap_reg(struct netmap_adapter *na, int on) 631 { 632 struct ifnet *ifp = na->ifp; 633 struct vi_info *vi = ifp->if_softc; 634 struct adapter *sc = vi->pi->adapter; 635 int rc; 636 637 rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nmreg"); 638 if (rc != 0) 639 return (rc); 640 if (on) 641 rc = cxgbe_netmap_on(sc, vi, ifp, na); 642 else 643 rc = cxgbe_netmap_off(sc, vi, ifp, na); 644 end_synchronized_op(sc, 0); 645 646 return (rc); 647 } 648 649 /* How many packets can a single type1 WR carry in n descriptors */ 650 static inline int 651 ndesc_to_npkt(const int n) 652 { 653 654 MPASS(n > 0 && n <= SGE_MAX_WR_NDESC); 655 656 return (n * 2 - 1); 657 } 658 #define MAX_NPKT_IN_TYPE1_WR (ndesc_to_npkt(SGE_MAX_WR_NDESC)) 659 660 /* Space (in descriptors) needed for a type1 WR that carries n packets */ 661 static inline int 662 npkt_to_ndesc(const int n) 663 { 664 665 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 666 667 return ((n + 2) / 2); 668 } 669 670 /* Space (in 16B units) needed for a type1 WR that carries n packets */ 671 static inline int 672 npkt_to_len16(const int n) 673 { 674 675 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 676 677 return (n * 2 + 1); 678 } 679 680 #define NMIDXDIFF(q, idx) IDXDIFF((q)->pidx, (q)->idx, (q)->sidx) 681 682 static void 683 ring_nm_txq_db(struct adapter *sc, struct sge_nm_txq *nm_txq) 684 { 685 int n; 686 u_int db = nm_txq->doorbells; 687 688 MPASS(nm_txq->pidx != nm_txq->dbidx); 689 690 n = NMIDXDIFF(nm_txq, dbidx); 691 if (n > 1) 692 clrbit(&db, DOORBELL_WCWR); 693 wmb(); 694 695 switch (ffs(db) - 1) { 696 case DOORBELL_UDB: 697 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 698 break; 699 700 case DOORBELL_WCWR: { 701 volatile uint64_t *dst, *src; 702 703 /* 704 * Queues whose 128B doorbell segment fits in the page do not 705 * use relative qid (udb_qid is always 0). Only queues with 706 * doorbell segments can do WCWR. 707 */ 708 KASSERT(nm_txq->udb_qid == 0 && n == 1, 709 ("%s: inappropriate doorbell (0x%x, %d, %d) for nm_txq %p", 710 __func__, nm_txq->doorbells, n, nm_txq->pidx, nm_txq)); 711 712 dst = (volatile void *)((uintptr_t)nm_txq->udb + 713 UDBS_WR_OFFSET - UDBS_DB_OFFSET); 714 src = (void *)&nm_txq->desc[nm_txq->dbidx]; 715 while (src != (void *)&nm_txq->desc[nm_txq->dbidx + 1]) 716 *dst++ = *src++; 717 wmb(); 718 break; 719 } 720 721 case DOORBELL_UDBWC: 722 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 723 wmb(); 724 break; 725 726 case DOORBELL_KDB: 727 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 728 V_QID(nm_txq->cntxt_id) | V_PIDX(n)); 729 break; 730 } 731 nm_txq->dbidx = nm_txq->pidx; 732 } 733 734 int lazy_tx_credit_flush = 1; 735 736 /* 737 * Write work requests to send 'npkt' frames and ring the doorbell to send them 738 * on their way. No need to check for wraparound. 739 */ 740 static void 741 cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_txq, 742 struct netmap_kring *kring, int npkt, int npkt_remaining, int txcsum) 743 { 744 struct netmap_ring *ring = kring->ring; 745 struct netmap_slot *slot; 746 const u_int lim = kring->nkr_num_slots - 1; 747 struct fw_eth_tx_pkts_wr *wr = (void *)&nm_txq->desc[nm_txq->pidx]; 748 uint16_t len; 749 uint64_t ba; 750 struct cpl_tx_pkt_core *cpl; 751 struct ulptx_sgl *usgl; 752 int i, n; 753 754 while (npkt) { 755 n = min(npkt, MAX_NPKT_IN_TYPE1_WR); 756 len = 0; 757 758 wr = (void *)&nm_txq->desc[nm_txq->pidx]; 759 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 760 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(npkt_to_len16(n))); 761 wr->npkt = n; 762 wr->r3 = 0; 763 wr->type = 1; 764 cpl = (void *)(wr + 1); 765 766 for (i = 0; i < n; i++) { 767 slot = &ring->slot[kring->nr_hwcur]; 768 PNMB(kring->na, slot, &ba); 769 MPASS(ba != 0); 770 771 cpl->ctrl0 = nm_txq->cpl_ctrl0; 772 cpl->pack = 0; 773 cpl->len = htobe16(slot->len); 774 /* 775 * netmap(4) says "netmap does not use features such as 776 * checksum offloading, TCP segmentation offloading, 777 * encryption, VLAN encapsulation/decapsulation, etc." 778 * 779 * So the ncxl interfaces have tx hardware checksumming 780 * disabled by default. But you can override netmap by 781 * enabling IFCAP_TXCSUM on the interface manully. 782 */ 783 cpl->ctrl1 = txcsum ? 0 : 784 htobe64(F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS); 785 786 usgl = (void *)(cpl + 1); 787 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 788 V_ULPTX_NSGE(1)); 789 usgl->len0 = htobe32(slot->len); 790 usgl->addr0 = htobe64(ba); 791 792 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 793 cpl = (void *)(usgl + 1); 794 MPASS(slot->len + len <= UINT16_MAX); 795 len += slot->len; 796 kring->nr_hwcur = nm_next(kring->nr_hwcur, lim); 797 } 798 wr->plen = htobe16(len); 799 800 npkt -= n; 801 nm_txq->pidx += npkt_to_ndesc(n); 802 MPASS(nm_txq->pidx <= nm_txq->sidx); 803 if (__predict_false(nm_txq->pidx == nm_txq->sidx)) { 804 /* 805 * This routine doesn't know how to write WRs that wrap 806 * around. Make sure it wasn't asked to. 807 */ 808 MPASS(npkt == 0); 809 nm_txq->pidx = 0; 810 } 811 812 if (npkt == 0 && npkt_remaining == 0) { 813 /* All done. */ 814 if (lazy_tx_credit_flush == 0) { 815 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 816 F_FW_WR_EQUIQ); 817 nm_txq->equeqidx = nm_txq->pidx; 818 nm_txq->equiqidx = nm_txq->pidx; 819 } 820 ring_nm_txq_db(sc, nm_txq); 821 return; 822 } 823 824 if (NMIDXDIFF(nm_txq, equiqidx) >= nm_txq->sidx / 2) { 825 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 826 F_FW_WR_EQUIQ); 827 nm_txq->equeqidx = nm_txq->pidx; 828 nm_txq->equiqidx = nm_txq->pidx; 829 } else if (NMIDXDIFF(nm_txq, equeqidx) >= 64) { 830 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); 831 nm_txq->equeqidx = nm_txq->pidx; 832 } 833 if (NMIDXDIFF(nm_txq, dbidx) >= 2 * SGE_MAX_WR_NDESC) 834 ring_nm_txq_db(sc, nm_txq); 835 } 836 837 /* Will get called again. */ 838 MPASS(npkt_remaining); 839 } 840 841 /* How many contiguous free descriptors starting at pidx */ 842 static inline int 843 contiguous_ndesc_available(struct sge_nm_txq *nm_txq) 844 { 845 846 if (nm_txq->cidx > nm_txq->pidx) 847 return (nm_txq->cidx - nm_txq->pidx - 1); 848 else if (nm_txq->cidx > 0) 849 return (nm_txq->sidx - nm_txq->pidx); 850 else 851 return (nm_txq->sidx - nm_txq->pidx - 1); 852 } 853 854 static int 855 reclaim_nm_tx_desc(struct sge_nm_txq *nm_txq) 856 { 857 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx]; 858 uint16_t hw_cidx = spg->cidx; /* snapshot */ 859 struct fw_eth_tx_pkts_wr *wr; 860 int n = 0; 861 862 hw_cidx = be16toh(hw_cidx); 863 864 while (nm_txq->cidx != hw_cidx) { 865 wr = (void *)&nm_txq->desc[nm_txq->cidx]; 866 867 MPASS(wr->op_pkd == htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR))); 868 MPASS(wr->type == 1); 869 MPASS(wr->npkt > 0 && wr->npkt <= MAX_NPKT_IN_TYPE1_WR); 870 871 n += wr->npkt; 872 nm_txq->cidx += npkt_to_ndesc(wr->npkt); 873 874 /* 875 * We never sent a WR that wrapped around so the credits coming 876 * back, WR by WR, should never cause the cidx to wrap around 877 * either. 878 */ 879 MPASS(nm_txq->cidx <= nm_txq->sidx); 880 if (__predict_false(nm_txq->cidx == nm_txq->sidx)) 881 nm_txq->cidx = 0; 882 } 883 884 return (n); 885 } 886 887 static int 888 cxgbe_netmap_txsync(struct netmap_kring *kring, int flags) 889 { 890 struct netmap_adapter *na = kring->na; 891 struct ifnet *ifp = na->ifp; 892 struct vi_info *vi = ifp->if_softc; 893 struct adapter *sc = vi->pi->adapter; 894 struct sge_nm_txq *nm_txq = &sc->sge.nm_txq[vi->first_txq + kring->ring_id]; 895 const u_int head = kring->rhead; 896 u_int reclaimed = 0; 897 int n, d, npkt_remaining, ndesc_remaining, txcsum; 898 899 /* 900 * Tx was at kring->nr_hwcur last time around and now we need to advance 901 * to kring->rhead. Note that the driver's pidx moves independent of 902 * netmap's kring->nr_hwcur (pidx counts descriptors and the relation 903 * between descriptors and frames isn't 1:1). 904 */ 905 906 npkt_remaining = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 907 kring->nkr_num_slots - kring->nr_hwcur + head; 908 txcsum = ifp->if_capenable & (IFCAP_TXCSUM | IFCAP_TXCSUM_IPV6); 909 while (npkt_remaining) { 910 reclaimed += reclaim_nm_tx_desc(nm_txq); 911 ndesc_remaining = contiguous_ndesc_available(nm_txq); 912 /* Can't run out of descriptors with packets still remaining */ 913 MPASS(ndesc_remaining > 0); 914 915 /* # of desc needed to tx all remaining packets */ 916 d = (npkt_remaining / MAX_NPKT_IN_TYPE1_WR) * SGE_MAX_WR_NDESC; 917 if (npkt_remaining % MAX_NPKT_IN_TYPE1_WR) 918 d += npkt_to_ndesc(npkt_remaining % MAX_NPKT_IN_TYPE1_WR); 919 920 if (d <= ndesc_remaining) 921 n = npkt_remaining; 922 else { 923 /* Can't send all, calculate how many can be sent */ 924 n = (ndesc_remaining / SGE_MAX_WR_NDESC) * 925 MAX_NPKT_IN_TYPE1_WR; 926 if (ndesc_remaining % SGE_MAX_WR_NDESC) 927 n += ndesc_to_npkt(ndesc_remaining % SGE_MAX_WR_NDESC); 928 } 929 930 /* Send n packets and update nm_txq->pidx and kring->nr_hwcur */ 931 npkt_remaining -= n; 932 cxgbe_nm_tx(sc, nm_txq, kring, n, npkt_remaining, txcsum); 933 } 934 MPASS(npkt_remaining == 0); 935 MPASS(kring->nr_hwcur == head); 936 MPASS(nm_txq->dbidx == nm_txq->pidx); 937 938 /* 939 * Second part: reclaim buffers for completed transmissions. 940 */ 941 if (reclaimed || flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { 942 reclaimed += reclaim_nm_tx_desc(nm_txq); 943 kring->nr_hwtail += reclaimed; 944 if (kring->nr_hwtail >= kring->nkr_num_slots) 945 kring->nr_hwtail -= kring->nkr_num_slots; 946 } 947 948 return (0); 949 } 950 951 static int 952 cxgbe_netmap_rxsync(struct netmap_kring *kring, int flags) 953 { 954 struct netmap_adapter *na = kring->na; 955 struct netmap_ring *ring = kring->ring; 956 struct ifnet *ifp = na->ifp; 957 struct vi_info *vi = ifp->if_softc; 958 struct adapter *sc = vi->pi->adapter; 959 struct sge_nm_rxq *nm_rxq = &sc->sge.nm_rxq[vi->first_rxq + kring->ring_id]; 960 u_int const head = kring->rhead; 961 u_int n; 962 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 963 964 if (black_hole) 965 return (0); /* No updates ever. */ 966 967 if (netmap_no_pendintr || force_update) { 968 kring->nr_hwtail = atomic_load_acq_32(&nm_rxq->fl_cidx); 969 kring->nr_kflags &= ~NKR_PENDINTR; 970 } 971 972 /* Userspace done with buffers from kring->nr_hwcur to head */ 973 n = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 974 kring->nkr_num_slots - kring->nr_hwcur + head; 975 n &= ~7U; 976 if (n > 0) { 977 u_int fl_pidx = nm_rxq->fl_pidx; 978 struct netmap_slot *slot = &ring->slot[fl_pidx]; 979 uint64_t ba; 980 int i, dbinc = 0, hwidx = nm_rxq->fl_hwidx; 981 982 /* 983 * We always deal with 8 buffers at a time. We must have 984 * stopped at an 8B boundary (fl_pidx) last time around and we 985 * must have a multiple of 8B buffers to give to the freelist. 986 */ 987 MPASS((fl_pidx & 7) == 0); 988 MPASS((n & 7) == 0); 989 990 IDXINCR(kring->nr_hwcur, n, kring->nkr_num_slots); 991 IDXINCR(nm_rxq->fl_pidx, n, nm_rxq->fl_sidx); 992 993 while (n > 0) { 994 for (i = 0; i < 8; i++, fl_pidx++, slot++) { 995 PNMB(na, slot, &ba); 996 MPASS(ba != 0); 997 nm_rxq->fl_desc[fl_pidx] = htobe64(ba | hwidx); 998 slot->flags &= ~NS_BUF_CHANGED; 999 MPASS(fl_pidx <= nm_rxq->fl_sidx); 1000 } 1001 n -= 8; 1002 if (fl_pidx == nm_rxq->fl_sidx) { 1003 fl_pidx = 0; 1004 slot = &ring->slot[0]; 1005 } 1006 if (++dbinc == 8 && n >= 32) { 1007 wmb(); 1008 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 1009 nm_rxq->fl_db_val | V_PIDX(dbinc)); 1010 dbinc = 0; 1011 } 1012 } 1013 MPASS(nm_rxq->fl_pidx == fl_pidx); 1014 1015 if (dbinc > 0) { 1016 wmb(); 1017 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 1018 nm_rxq->fl_db_val | V_PIDX(dbinc)); 1019 } 1020 } 1021 1022 return (0); 1023 } 1024 1025 static int 1026 ncxgbe_probe(device_t dev) 1027 { 1028 char buf[128]; 1029 struct vi_info *vi = device_get_softc(dev); 1030 1031 snprintf(buf, sizeof(buf), "port %d netmap vi", vi->pi->port_id); 1032 device_set_desc_copy(dev, buf); 1033 1034 return (BUS_PROBE_DEFAULT); 1035 } 1036 1037 static int 1038 ncxgbe_attach(device_t dev) 1039 { 1040 struct vi_info *vi; 1041 struct port_info *pi; 1042 struct adapter *sc; 1043 struct netmap_adapter na; 1044 struct ifnet *ifp; 1045 int rc; 1046 1047 vi = device_get_softc(dev); 1048 pi = vi->pi; 1049 sc = pi->adapter; 1050 1051 /* 1052 * Allocate a virtual interface exclusively for netmap use. Give it the 1053 * MAC address normally reserved for use by a TOE interface. (The TOE 1054 * driver on FreeBSD doesn't use it). 1055 */ 1056 rc = t4_alloc_vi_func(sc, sc->mbox, pi->tx_chan, sc->pf, 0, 1, 1057 vi->hw_addr, &vi->rss_size, FW_VI_FUNC_OFLD, 0); 1058 if (rc < 0) { 1059 device_printf(dev, "unable to allocate netmap virtual " 1060 "interface for port %d: %d\n", pi->port_id, -rc); 1061 return (-rc); 1062 } 1063 vi->viid = rc; 1064 vi->xact_addr_filt = -1; 1065 callout_init(&vi->tick, 1); 1066 1067 ifp = if_alloc(IFT_ETHER); 1068 if (ifp == NULL) { 1069 device_printf(dev, "Cannot allocate netmap ifnet\n"); 1070 return (ENOMEM); 1071 } 1072 vi->ifp = ifp; 1073 ifp->if_softc = vi; 1074 1075 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 1076 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1077 1078 ifp->if_init = cxgbe_nm_init; 1079 ifp->if_ioctl = cxgbe_nm_ioctl; 1080 ifp->if_transmit = cxgbe_nm_transmit; 1081 ifp->if_qflush = cxgbe_nm_qflush; 1082 ifp->if_get_counter = cxgbe_get_counter; 1083 1084 /* 1085 * netmap(4) says "netmap does not use features such as checksum 1086 * offloading, TCP segmentation offloading, encryption, VLAN 1087 * encapsulation/decapsulation, etc." 1088 * 1089 * By default we comply with the statement above. But we do declare the 1090 * ifnet capable of L3/L4 checksumming so that a user can override 1091 * netmap and have the hardware do the L3/L4 checksums. 1092 */ 1093 ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_JUMBO_MTU | 1094 IFCAP_HWCSUM_IPV6; 1095 ifp->if_capenable = 0; 1096 ifp->if_hwassist = 0; 1097 1098 /* vi->media has already been setup by the caller */ 1099 1100 ether_ifattach(ifp, vi->hw_addr); 1101 1102 device_printf(dev, "%d txq, %d rxq (netmap)\n", vi->ntxq, vi->nrxq); 1103 1104 vi_sysctls(vi); 1105 1106 /* 1107 * Register with netmap in the kernel. 1108 */ 1109 bzero(&na, sizeof(na)); 1110 1111 na.ifp = ifp; 1112 na.na_flags = NAF_BDG_MAYSLEEP; 1113 1114 /* Netmap doesn't know about the space reserved for the status page. */ 1115 na.num_tx_desc = vi->qsize_txq - spg_len / EQ_ESIZE; 1116 1117 /* 1118 * The freelist's cidx/pidx drives netmap's rx cidx/pidx. So 1119 * num_rx_desc is based on the number of buffers that can be held in the 1120 * freelist, and not the number of entries in the iq. (These two are 1121 * not exactly the same due to the space taken up by the status page). 1122 */ 1123 na.num_rx_desc = (vi->qsize_rxq / 8) * 8; 1124 na.nm_txsync = cxgbe_netmap_txsync; 1125 na.nm_rxsync = cxgbe_netmap_rxsync; 1126 na.nm_register = cxgbe_netmap_reg; 1127 na.num_tx_rings = vi->ntxq; 1128 na.num_rx_rings = vi->nrxq; 1129 netmap_attach(&na); /* This adds IFCAP_NETMAP to if_capabilities */ 1130 1131 return (0); 1132 } 1133 1134 static int 1135 ncxgbe_detach(device_t dev) 1136 { 1137 struct vi_info *vi; 1138 struct adapter *sc; 1139 1140 vi = device_get_softc(dev); 1141 sc = vi->pi->adapter; 1142 1143 doom_vi(sc, vi); 1144 1145 netmap_detach(vi->ifp); 1146 ether_ifdetach(vi->ifp); 1147 cxgbe_nm_uninit_synchronized(vi); 1148 callout_drain(&vi->tick); 1149 vi_full_uninit(vi); 1150 ifmedia_removeall(&vi->media); 1151 if_free(vi->ifp); 1152 vi->ifp = NULL; 1153 t4_free_vi(sc, sc->mbox, sc->pf, 0, vi->viid); 1154 1155 end_synchronized_op(sc, 0); 1156 1157 return (0); 1158 } 1159 1160 static void 1161 handle_nm_fw6_msg(struct adapter *sc, struct ifnet *ifp, 1162 const struct cpl_fw6_msg *cpl) 1163 { 1164 const struct cpl_sge_egr_update *egr; 1165 uint32_t oq; 1166 struct sge_nm_txq *nm_txq; 1167 1168 if (cpl->type != FW_TYPE_RSSCPL && cpl->type != FW6_TYPE_RSSCPL) 1169 panic("%s: FW_TYPE 0x%x on nm_rxq.", __func__, cpl->type); 1170 1171 /* data[0] is RSS header */ 1172 egr = (const void *)&cpl->data[1]; 1173 oq = be32toh(egr->opcode_qid); 1174 MPASS(G_CPL_OPCODE(oq) == CPL_SGE_EGR_UPDATE); 1175 nm_txq = (void *)sc->sge.eqmap[G_EGR_QID(oq) - sc->sge.eq_start]; 1176 1177 netmap_tx_irq(ifp, nm_txq->nid); 1178 } 1179 1180 void 1181 t4_nm_intr(void *arg) 1182 { 1183 struct sge_nm_rxq *nm_rxq = arg; 1184 struct vi_info *vi = nm_rxq->vi; 1185 struct adapter *sc = vi->pi->adapter; 1186 struct ifnet *ifp = vi->ifp; 1187 struct netmap_adapter *na = NA(ifp); 1188 struct netmap_kring *kring = &na->rx_rings[nm_rxq->nid]; 1189 struct netmap_ring *ring = kring->ring; 1190 struct iq_desc *d = &nm_rxq->iq_desc[nm_rxq->iq_cidx]; 1191 uint32_t lq; 1192 u_int n = 0, work = 0; 1193 uint8_t opcode; 1194 uint32_t fl_cidx = atomic_load_acq_32(&nm_rxq->fl_cidx); 1195 u_int fl_credits = fl_cidx & 7; 1196 1197 while ((d->rsp.u.type_gen & F_RSPD_GEN) == nm_rxq->iq_gen) { 1198 1199 rmb(); 1200 1201 lq = be32toh(d->rsp.pldbuflen_qid); 1202 opcode = d->rss.opcode; 1203 1204 switch (G_RSPD_TYPE(d->rsp.u.type_gen)) { 1205 case X_RSPD_TYPE_FLBUF: 1206 if (black_hole != 2) { 1207 /* No buffer packing so new buf every time */ 1208 MPASS(lq & F_RSPD_NEWBUF); 1209 } 1210 1211 /* fall through */ 1212 1213 case X_RSPD_TYPE_CPL: 1214 MPASS(opcode < NUM_CPL_CMDS); 1215 1216 switch (opcode) { 1217 case CPL_FW4_MSG: 1218 case CPL_FW6_MSG: 1219 handle_nm_fw6_msg(sc, ifp, 1220 (const void *)&d->cpl[0]); 1221 break; 1222 case CPL_RX_PKT: 1223 ring->slot[fl_cidx].len = G_RSPD_LEN(lq) - fl_pktshift; 1224 ring->slot[fl_cidx].flags = kring->nkr_slot_flags; 1225 fl_cidx += (lq & F_RSPD_NEWBUF) ? 1 : 0; 1226 fl_credits += (lq & F_RSPD_NEWBUF) ? 1 : 0; 1227 if (__predict_false(fl_cidx == nm_rxq->fl_sidx)) 1228 fl_cidx = 0; 1229 break; 1230 default: 1231 panic("%s: unexpected opcode 0x%x on nm_rxq %p", 1232 __func__, opcode, nm_rxq); 1233 } 1234 break; 1235 1236 case X_RSPD_TYPE_INTR: 1237 /* Not equipped to handle forwarded interrupts. */ 1238 panic("%s: netmap queue received interrupt for iq %u\n", 1239 __func__, lq); 1240 1241 default: 1242 panic("%s: illegal response type %d on nm_rxq %p", 1243 __func__, G_RSPD_TYPE(d->rsp.u.type_gen), nm_rxq); 1244 } 1245 1246 d++; 1247 if (__predict_false(++nm_rxq->iq_cidx == nm_rxq->iq_sidx)) { 1248 nm_rxq->iq_cidx = 0; 1249 d = &nm_rxq->iq_desc[0]; 1250 nm_rxq->iq_gen ^= F_RSPD_GEN; 1251 } 1252 1253 if (__predict_false(++n == rx_ndesc)) { 1254 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx); 1255 if (black_hole && fl_credits >= 8) { 1256 fl_credits /= 8; 1257 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8, 1258 nm_rxq->fl_sidx); 1259 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 1260 nm_rxq->fl_db_val | V_PIDX(fl_credits)); 1261 fl_credits = fl_cidx & 7; 1262 } else if (!black_hole) { 1263 netmap_rx_irq(ifp, nm_rxq->nid, &work); 1264 MPASS(work != 0); 1265 } 1266 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 1267 V_CIDXINC(n) | V_INGRESSQID(nm_rxq->iq_cntxt_id) | 1268 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 1269 n = 0; 1270 } 1271 } 1272 1273 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx); 1274 if (black_hole) { 1275 fl_credits /= 8; 1276 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8, nm_rxq->fl_sidx); 1277 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 1278 nm_rxq->fl_db_val | V_PIDX(fl_credits)); 1279 } else 1280 netmap_rx_irq(ifp, nm_rxq->nid, &work); 1281 1282 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(n) | 1283 V_INGRESSQID((u32)nm_rxq->iq_cntxt_id) | 1284 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx))); 1285 } 1286 1287 static devclass_t ncxgbe_devclass, ncxl_devclass; 1288 1289 DRIVER_MODULE(ncxgbe, cxgbe, ncxgbe_driver, ncxgbe_devclass, 0, 0); 1290 MODULE_VERSION(ncxgbe, 1); 1291 1292 DRIVER_MODULE(ncxl, cxl, ncxl_driver, ncxl_devclass, 0, 0); 1293 MODULE_VERSION(ncxl, 1); 1294 #endif 1295