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/eventhandler.h> 37 #include <sys/lock.h> 38 #include <sys/types.h> 39 #include <sys/mbuf.h> 40 #include <sys/selinfo.h> 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 #include <machine/bus.h> 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_media.h> 47 #include <net/if_var.h> 48 #include <net/if_clone.h> 49 #include <net/if_types.h> 50 #include <net/netmap.h> 51 #include <dev/netmap/netmap_kern.h> 52 53 #include "common/common.h" 54 #include "common/t4_regs.h" 55 #include "common/t4_regs_values.h" 56 57 extern int fl_pad; /* XXXNM */ 58 extern int spg_len; /* XXXNM */ 59 extern int fl_pktshift; /* XXXNM */ 60 61 /* netmap ifnet routines */ 62 static void cxgbe_nm_init(void *); 63 static int cxgbe_nm_ioctl(struct ifnet *, unsigned long, caddr_t); 64 static int cxgbe_nm_transmit(struct ifnet *, struct mbuf *); 65 static void cxgbe_nm_qflush(struct ifnet *); 66 67 static int cxgbe_nm_init_synchronized(struct port_info *); 68 static int cxgbe_nm_uninit_synchronized(struct port_info *); 69 70 static void 71 cxgbe_nm_init(void *arg) 72 { 73 struct port_info *pi = arg; 74 struct adapter *sc = pi->adapter; 75 76 if (begin_synchronized_op(sc, pi, SLEEP_OK | INTR_OK, "t4nminit") != 0) 77 return; 78 cxgbe_nm_init_synchronized(pi); 79 end_synchronized_op(sc, 0); 80 81 return; 82 } 83 84 static int 85 cxgbe_nm_init_synchronized(struct port_info *pi) 86 { 87 struct adapter *sc = pi->adapter; 88 struct ifnet *ifp = pi->nm_ifp; 89 int rc = 0; 90 91 ASSERT_SYNCHRONIZED_OP(sc); 92 93 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 94 return (0); /* already running */ 95 96 if (!(sc->flags & FULL_INIT_DONE) && 97 ((rc = adapter_full_init(sc)) != 0)) 98 return (rc); /* error message displayed already */ 99 100 if (!(pi->flags & PORT_INIT_DONE) && 101 ((rc = port_full_init(pi)) != 0)) 102 return (rc); /* error message displayed already */ 103 104 rc = update_mac_settings(ifp, XGMAC_ALL); 105 if (rc) 106 return (rc); /* error message displayed already */ 107 108 ifp->if_drv_flags |= IFF_DRV_RUNNING; 109 110 return (rc); 111 } 112 113 static int 114 cxgbe_nm_uninit_synchronized(struct port_info *pi) 115 { 116 #ifdef INVARIANTS 117 struct adapter *sc = pi->adapter; 118 #endif 119 struct ifnet *ifp = pi->nm_ifp; 120 121 ASSERT_SYNCHRONIZED_OP(sc); 122 123 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 124 125 return (0); 126 } 127 128 static int 129 cxgbe_nm_ioctl(struct ifnet *ifp, unsigned long cmd, caddr_t data) 130 { 131 int rc = 0, mtu, flags; 132 struct port_info *pi = ifp->if_softc; 133 struct adapter *sc = pi->adapter; 134 struct ifreq *ifr = (struct ifreq *)data; 135 uint32_t mask; 136 137 MPASS(pi->nm_ifp == ifp); 138 139 switch (cmd) { 140 case SIOCSIFMTU: 141 mtu = ifr->ifr_mtu; 142 if ((mtu < ETHERMIN) || (mtu > ETHERMTU_JUMBO)) 143 return (EINVAL); 144 145 rc = begin_synchronized_op(sc, pi, SLEEP_OK | INTR_OK, "t4nmtu"); 146 if (rc) 147 return (rc); 148 ifp->if_mtu = mtu; 149 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 150 rc = update_mac_settings(ifp, XGMAC_MTU); 151 end_synchronized_op(sc, 0); 152 break; 153 154 case SIOCSIFFLAGS: 155 rc = begin_synchronized_op(sc, pi, SLEEP_OK | INTR_OK, "t4nflg"); 156 if (rc) 157 return (rc); 158 159 if (ifp->if_flags & IFF_UP) { 160 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 161 flags = pi->nmif_flags; 162 if ((ifp->if_flags ^ flags) & 163 (IFF_PROMISC | IFF_ALLMULTI)) { 164 rc = update_mac_settings(ifp, 165 XGMAC_PROMISC | XGMAC_ALLMULTI); 166 } 167 } else 168 rc = cxgbe_nm_init_synchronized(pi); 169 pi->nmif_flags = ifp->if_flags; 170 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING) 171 rc = cxgbe_nm_uninit_synchronized(pi); 172 end_synchronized_op(sc, 0); 173 break; 174 175 case SIOCADDMULTI: 176 case SIOCDELMULTI: /* these two are called with a mutex held :-( */ 177 rc = begin_synchronized_op(sc, pi, HOLD_LOCK, "t4nmulti"); 178 if (rc) 179 return (rc); 180 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 181 rc = update_mac_settings(ifp, XGMAC_MCADDRS); 182 end_synchronized_op(sc, LOCK_HELD); 183 break; 184 185 case SIOCSIFCAP: 186 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 187 if (mask & IFCAP_TXCSUM) { 188 ifp->if_capenable ^= IFCAP_TXCSUM; 189 ifp->if_hwassist ^= (CSUM_TCP | CSUM_UDP | CSUM_IP); 190 } 191 if (mask & IFCAP_TXCSUM_IPV6) { 192 ifp->if_capenable ^= IFCAP_TXCSUM_IPV6; 193 ifp->if_hwassist ^= (CSUM_UDP_IPV6 | CSUM_TCP_IPV6); 194 } 195 if (mask & IFCAP_RXCSUM) 196 ifp->if_capenable ^= IFCAP_RXCSUM; 197 if (mask & IFCAP_RXCSUM_IPV6) 198 ifp->if_capenable ^= IFCAP_RXCSUM_IPV6; 199 break; 200 201 case SIOCSIFMEDIA: 202 case SIOCGIFMEDIA: 203 ifmedia_ioctl(ifp, ifr, &pi->nm_media, cmd); 204 break; 205 206 default: 207 rc = ether_ioctl(ifp, cmd, data); 208 } 209 210 return (rc); 211 } 212 213 static int 214 cxgbe_nm_transmit(struct ifnet *ifp, struct mbuf *m) 215 { 216 217 m_freem(m); 218 return (0); 219 } 220 221 static void 222 cxgbe_nm_qflush(struct ifnet *ifp) 223 { 224 225 return; 226 } 227 228 static int 229 alloc_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) 230 { 231 int rc, cntxt_id; 232 __be32 v; 233 struct adapter *sc = pi->adapter; 234 struct netmap_adapter *na = NA(pi->nm_ifp); 235 struct fw_iq_cmd c; 236 237 MPASS(na != NULL); 238 MPASS(nm_rxq->iq_desc != NULL); 239 MPASS(nm_rxq->fl_desc != NULL); 240 241 bzero(nm_rxq->iq_desc, pi->qsize_rxq * IQ_ESIZE); 242 bzero(nm_rxq->fl_desc, na->num_rx_desc * EQ_ESIZE + spg_len); 243 244 bzero(&c, sizeof(c)); 245 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 246 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 247 V_FW_IQ_CMD_VFN(0)); 248 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 249 FW_LEN16(c)); 250 if (pi->flags & INTR_NM_RXQ) { 251 KASSERT(nm_rxq->intr_idx < sc->intr_count, 252 ("%s: invalid direct intr_idx %d", __func__, 253 nm_rxq->intr_idx)); 254 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx); 255 } else { 256 CXGBE_UNIMPLEMENTED(__func__); /* XXXNM: needs review */ 257 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx) | 258 F_FW_IQ_CMD_IQANDST; 259 } 260 c.type_to_iqandstindex = htobe32(v | 261 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 262 V_FW_IQ_CMD_VIID(pi->nm_viid) | 263 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 264 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) | 265 F_FW_IQ_CMD_IQGTSMODE | 266 V_FW_IQ_CMD_IQINTCNTTHRESH(0) | 267 V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4)); 268 c.iqsize = htobe16(pi->qsize_rxq); 269 c.iqaddr = htobe64(nm_rxq->iq_ba); 270 c.iqns_to_fl0congen |= 271 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 272 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 273 (fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0)); 274 c.fl0dcaen_to_fl0cidxfthresh = 275 htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) | 276 V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B)); 277 c.fl0size = htobe16(na->num_rx_desc + spg_len / EQ_ESIZE); 278 c.fl0addr = htobe64(nm_rxq->fl_ba); 279 280 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 281 if (rc != 0) { 282 device_printf(sc->dev, 283 "failed to create netmap ingress queue: %d\n", rc); 284 return (rc); 285 } 286 287 nm_rxq->iq_cidx = 0; 288 MPASS(nm_rxq->iq_sidx == pi->qsize_rxq - spg_len / IQ_ESIZE); 289 nm_rxq->iq_gen = F_RSPD_GEN; 290 nm_rxq->iq_cntxt_id = be16toh(c.iqid); 291 nm_rxq->iq_abs_id = be16toh(c.physiqid); 292 cntxt_id = nm_rxq->iq_cntxt_id - sc->sge.iq_start; 293 if (cntxt_id >= sc->sge.niq) { 294 panic ("%s: nm_rxq->iq_cntxt_id (%d) more than the max (%d)", 295 __func__, cntxt_id, sc->sge.niq - 1); 296 } 297 sc->sge.iqmap[cntxt_id] = (void *)nm_rxq; 298 299 nm_rxq->fl_cntxt_id = be16toh(c.fl0id); 300 nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0; 301 MPASS(nm_rxq->fl_sidx == na->num_rx_desc); 302 cntxt_id = nm_rxq->fl_cntxt_id - sc->sge.eq_start; 303 if (cntxt_id >= sc->sge.neq) { 304 panic("%s: nm_rxq->fl_cntxt_id (%d) more than the max (%d)", 305 __func__, cntxt_id, sc->sge.neq - 1); 306 } 307 sc->sge.eqmap[cntxt_id] = (void *)nm_rxq; 308 309 nm_rxq->fl_db_val = F_DBPRIO | V_QID(nm_rxq->fl_cntxt_id) | V_PIDX(0); 310 if (is_t5(sc)) 311 nm_rxq->fl_db_val |= F_DBTYPE; 312 313 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(F_QINTR_CNT_EN) | 314 V_INGRESSQID(nm_rxq->iq_cntxt_id)); 315 316 return (rc); 317 } 318 319 static int 320 free_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) 321 { 322 struct adapter *sc = pi->adapter; 323 int rc; 324 325 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, FW_IQ_TYPE_FL_INT_CAP, 326 nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, 0xffff); 327 if (rc != 0) 328 device_printf(sc->dev, "%s: failed for iq %d, fl %d: %d\n", 329 __func__, nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, rc); 330 return (rc); 331 } 332 333 static int 334 alloc_nm_txq_hwq(struct port_info *pi, struct sge_nm_txq *nm_txq) 335 { 336 int rc, cntxt_id; 337 size_t len; 338 struct adapter *sc = pi->adapter; 339 struct netmap_adapter *na = NA(pi->nm_ifp); 340 struct fw_eq_eth_cmd c; 341 342 MPASS(na != NULL); 343 MPASS(nm_txq->desc != NULL); 344 345 len = na->num_tx_desc * EQ_ESIZE + spg_len; 346 bzero(nm_txq->desc, len); 347 348 bzero(&c, sizeof(c)); 349 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 350 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 351 V_FW_EQ_ETH_CMD_VFN(0)); 352 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 353 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 354 c.autoequiqe_to_viid = htobe32(V_FW_EQ_ETH_CMD_VIID(pi->nm_viid)); 355 c.fetchszm_to_iqid = 356 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 357 V_FW_EQ_ETH_CMD_PCIECHN(pi->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 358 V_FW_EQ_ETH_CMD_IQID(sc->sge.nm_rxq[nm_txq->iqidx].iq_cntxt_id)); 359 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 360 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 361 V_FW_EQ_ETH_CMD_EQSIZE(len / EQ_ESIZE)); 362 c.eqaddr = htobe64(nm_txq->ba); 363 364 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 365 if (rc != 0) { 366 device_printf(pi->dev, 367 "failed to create netmap egress queue: %d\n", rc); 368 return (rc); 369 } 370 371 nm_txq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 372 cntxt_id = nm_txq->cntxt_id - sc->sge.eq_start; 373 if (cntxt_id >= sc->sge.neq) 374 panic("%s: nm_txq->cntxt_id (%d) more than the max (%d)", __func__, 375 cntxt_id, sc->sge.neq - 1); 376 sc->sge.eqmap[cntxt_id] = (void *)nm_txq; 377 378 nm_txq->pidx = nm_txq->cidx = 0; 379 MPASS(nm_txq->sidx == na->num_tx_desc); 380 nm_txq->equiqidx = nm_txq->equeqidx = nm_txq->dbidx = 0; 381 382 nm_txq->doorbells = sc->doorbells; 383 if (isset(&nm_txq->doorbells, DOORBELL_UDB) || 384 isset(&nm_txq->doorbells, DOORBELL_UDBWC) || 385 isset(&nm_txq->doorbells, DOORBELL_WCWR)) { 386 uint32_t s_qpp = sc->sge.eq_s_qpp; 387 uint32_t mask = (1 << s_qpp) - 1; 388 volatile uint8_t *udb; 389 390 udb = sc->udbs_base + UDBS_DB_OFFSET; 391 udb += (nm_txq->cntxt_id >> s_qpp) << PAGE_SHIFT; 392 nm_txq->udb_qid = nm_txq->cntxt_id & mask; 393 if (nm_txq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE) 394 clrbit(&nm_txq->doorbells, DOORBELL_WCWR); 395 else { 396 udb += nm_txq->udb_qid << UDBS_SEG_SHIFT; 397 nm_txq->udb_qid = 0; 398 } 399 nm_txq->udb = (volatile void *)udb; 400 } 401 402 return (rc); 403 } 404 405 static int 406 free_nm_txq_hwq(struct port_info *pi, struct sge_nm_txq *nm_txq) 407 { 408 struct adapter *sc = pi->adapter; 409 int rc; 410 411 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, nm_txq->cntxt_id); 412 if (rc != 0) 413 device_printf(sc->dev, "%s: failed for eq %d: %d\n", __func__, 414 nm_txq->cntxt_id, rc); 415 return (rc); 416 } 417 418 static int 419 cxgbe_netmap_on(struct adapter *sc, struct port_info *pi, struct ifnet *ifp, 420 struct netmap_adapter *na) 421 { 422 struct netmap_slot *slot; 423 struct sge_nm_rxq *nm_rxq; 424 struct sge_nm_txq *nm_txq; 425 int rc, i, j, hwidx; 426 struct hw_buf_info *hwb; 427 uint16_t *rss; 428 429 ASSERT_SYNCHRONIZED_OP(sc); 430 431 if ((pi->flags & PORT_INIT_DONE) == 0 || 432 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 433 return (EAGAIN); 434 435 hwb = &sc->sge.hw_buf_info[0]; 436 for (i = 0; i < SGE_FLBUF_SIZES; i++, hwb++) { 437 if (hwb->size == NETMAP_BUF_SIZE(na)) 438 break; 439 } 440 if (i >= SGE_FLBUF_SIZES) { 441 if_printf(ifp, "no hwidx for netmap buffer size %d.\n", 442 NETMAP_BUF_SIZE(na)); 443 return (ENXIO); 444 } 445 hwidx = i; 446 447 /* Must set caps before calling netmap_reset */ 448 nm_set_native_flags(na); 449 450 for_each_nm_rxq(pi, i, nm_rxq) { 451 alloc_nm_rxq_hwq(pi, nm_rxq); 452 nm_rxq->fl_hwidx = hwidx; 453 slot = netmap_reset(na, NR_RX, i, 0); 454 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 455 456 /* We deal with 8 bufs at a time */ 457 MPASS((na->num_rx_desc & 7) == 0); 458 MPASS(na->num_rx_desc == nm_rxq->fl_sidx); 459 for (j = 0; j < nm_rxq->fl_sidx - 8; j++) { 460 uint64_t ba; 461 462 PNMB(na, &slot[j], &ba); 463 nm_rxq->fl_desc[j] = htobe64(ba | hwidx); 464 } 465 nm_rxq->fl_pidx = j; 466 MPASS((j & 7) == 0); 467 j /= 8; /* driver pidx to hardware pidx */ 468 wmb(); 469 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 470 nm_rxq->fl_db_val | V_PIDX(j)); 471 } 472 473 for_each_nm_txq(pi, i, nm_txq) { 474 alloc_nm_txq_hwq(pi, nm_txq); 475 slot = netmap_reset(na, NR_TX, i, 0); 476 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 477 } 478 479 rss = malloc(pi->nm_rss_size * sizeof (*rss), M_CXGBE, M_ZERO | 480 M_WAITOK); 481 for (i = 0; i < pi->nm_rss_size;) { 482 for_each_nm_rxq(pi, j, nm_rxq) { 483 rss[i++] = nm_rxq->iq_abs_id; 484 if (i == pi->nm_rss_size) 485 break; 486 } 487 } 488 rc = -t4_config_rss_range(sc, sc->mbox, pi->nm_viid, 0, pi->nm_rss_size, 489 rss, pi->nm_rss_size); 490 if (rc != 0) 491 if_printf(ifp, "netmap rss_config failed: %d\n", rc); 492 free(rss, M_CXGBE); 493 494 rc = -t4_enable_vi(sc, sc->mbox, pi->nm_viid, true, true); 495 if (rc != 0) 496 if_printf(ifp, "netmap enable_vi failed: %d\n", rc); 497 498 return (rc); 499 } 500 501 static int 502 cxgbe_netmap_off(struct adapter *sc, struct port_info *pi, struct ifnet *ifp, 503 struct netmap_adapter *na) 504 { 505 int rc, i; 506 struct sge_nm_txq *nm_txq; 507 struct sge_nm_rxq *nm_rxq; 508 509 ASSERT_SYNCHRONIZED_OP(sc); 510 511 rc = -t4_enable_vi(sc, sc->mbox, pi->nm_viid, false, false); 512 if (rc != 0) 513 if_printf(ifp, "netmap disable_vi failed: %d\n", rc); 514 nm_clear_native_flags(na); 515 516 /* 517 * XXXNM: We need to make sure that the tx queues are quiet and won't 518 * request any more SGE_EGR_UPDATEs. 519 */ 520 521 for_each_nm_txq(pi, i, nm_txq) { 522 free_nm_txq_hwq(pi, nm_txq); 523 } 524 for_each_nm_rxq(pi, i, nm_rxq) { 525 free_nm_rxq_hwq(pi, nm_rxq); 526 } 527 528 return (rc); 529 } 530 531 static int 532 cxgbe_netmap_reg(struct netmap_adapter *na, int on) 533 { 534 struct ifnet *ifp = na->ifp; 535 struct port_info *pi = ifp->if_softc; 536 struct adapter *sc = pi->adapter; 537 int rc; 538 539 rc = begin_synchronized_op(sc, pi, SLEEP_OK | INTR_OK, "t4nmreg"); 540 if (rc != 0) 541 return (rc); 542 if (on) 543 rc = cxgbe_netmap_on(sc, pi, ifp, na); 544 else 545 rc = cxgbe_netmap_off(sc, pi, ifp, na); 546 end_synchronized_op(sc, 0); 547 548 return (rc); 549 } 550 551 /* How many packets can a single type1 WR carry in n descriptors */ 552 static inline int 553 ndesc_to_npkt(const int n) 554 { 555 556 MPASS(n > 0 && n <= SGE_MAX_WR_NDESC); 557 558 return (n * 2 - 1); 559 } 560 #define MAX_NPKT_IN_TYPE1_WR (ndesc_to_npkt(SGE_MAX_WR_NDESC)) 561 562 /* Space (in descriptors) needed for a type1 WR that carries n packets */ 563 static inline int 564 npkt_to_ndesc(const int n) 565 { 566 567 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 568 569 return ((n + 2) / 2); 570 } 571 572 /* Space (in 16B units) needed for a type1 WR that carries n packets */ 573 static inline int 574 npkt_to_len16(const int n) 575 { 576 577 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 578 579 return (n * 2 + 1); 580 } 581 582 #define NMIDXDIFF(q, idx) IDXDIFF((q)->pidx, (q)->idx, (q)->sidx) 583 584 static void 585 ring_nm_txq_db(struct adapter *sc, struct sge_nm_txq *nm_txq) 586 { 587 int n; 588 u_int db = nm_txq->doorbells; 589 590 MPASS(nm_txq->pidx != nm_txq->dbidx); 591 592 n = NMIDXDIFF(nm_txq, dbidx); 593 if (n > 1) 594 clrbit(&db, DOORBELL_WCWR); 595 wmb(); 596 597 switch (ffs(db) - 1) { 598 case DOORBELL_UDB: 599 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 600 break; 601 602 case DOORBELL_WCWR: { 603 volatile uint64_t *dst, *src; 604 605 /* 606 * Queues whose 128B doorbell segment fits in the page do not 607 * use relative qid (udb_qid is always 0). Only queues with 608 * doorbell segments can do WCWR. 609 */ 610 KASSERT(nm_txq->udb_qid == 0 && n == 1, 611 ("%s: inappropriate doorbell (0x%x, %d, %d) for nm_txq %p", 612 __func__, nm_txq->doorbells, n, nm_txq->pidx, nm_txq)); 613 614 dst = (volatile void *)((uintptr_t)nm_txq->udb + 615 UDBS_WR_OFFSET - UDBS_DB_OFFSET); 616 src = (void *)&nm_txq->desc[nm_txq->dbidx]; 617 while (src != (void *)&nm_txq->desc[nm_txq->dbidx + 1]) 618 *dst++ = *src++; 619 wmb(); 620 break; 621 } 622 623 case DOORBELL_UDBWC: 624 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 625 wmb(); 626 break; 627 628 case DOORBELL_KDB: 629 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 630 V_QID(nm_txq->cntxt_id) | V_PIDX(n)); 631 break; 632 } 633 nm_txq->dbidx = nm_txq->pidx; 634 } 635 636 int lazy_tx_credit_flush = 1; 637 638 /* 639 * Write work requests to send 'npkt' frames and ring the doorbell to send them 640 * on their way. No need to check for wraparound. 641 */ 642 static void 643 cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_txq, 644 struct netmap_kring *kring, int npkt, int npkt_remaining) 645 { 646 struct netmap_ring *ring = kring->ring; 647 struct netmap_slot *slot; 648 const u_int lim = kring->nkr_num_slots - 1; 649 struct fw_eth_tx_pkts_wr *wr = (void *)&nm_txq->desc[nm_txq->pidx]; 650 uint16_t len; 651 uint64_t ba; 652 struct cpl_tx_pkt_core *cpl; 653 struct ulptx_sgl *usgl; 654 int i, n; 655 656 while (npkt) { 657 n = min(npkt, MAX_NPKT_IN_TYPE1_WR); 658 len = 0; 659 660 wr = (void *)&nm_txq->desc[nm_txq->pidx]; 661 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 662 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(npkt_to_len16(n))); 663 wr->npkt = n; 664 wr->r3 = 0; 665 wr->type = 1; 666 cpl = (void *)(wr + 1); 667 668 for (i = 0; i < n; i++) { 669 slot = &ring->slot[kring->nr_hwcur]; 670 PNMB(kring->na, slot, &ba); 671 672 cpl->ctrl0 = nm_txq->cpl_ctrl0; 673 cpl->pack = 0; 674 cpl->len = htobe16(slot->len); 675 /* 676 * netmap(4) says "netmap does not use features such as 677 * checksum offloading, TCP segmentation offloading, 678 * encryption, VLAN encapsulation/decapsulation, etc." 679 * 680 * XXXNM: it makes sense to enable checksum offload. 681 */ 682 cpl->ctrl1 = htobe64(F_TXPKT_IPCSUM_DIS | 683 F_TXPKT_L4CSUM_DIS); 684 685 usgl = (void *)(cpl + 1); 686 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 687 V_ULPTX_NSGE(1)); 688 usgl->len0 = htobe32(slot->len); 689 usgl->addr0 = htobe64(ba); 690 691 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 692 cpl = (void *)(usgl + 1); 693 MPASS(slot->len + len <= UINT16_MAX); 694 len += slot->len; 695 kring->nr_hwcur = nm_next(kring->nr_hwcur, lim); 696 } 697 wr->plen = htobe16(len); 698 699 npkt -= n; 700 nm_txq->pidx += npkt_to_ndesc(n); 701 MPASS(nm_txq->pidx <= nm_txq->sidx); 702 if (__predict_false(nm_txq->pidx == nm_txq->sidx)) { 703 /* 704 * This routine doesn't know how to write WRs that wrap 705 * around. Make sure it wasn't asked to. 706 */ 707 MPASS(npkt == 0); 708 nm_txq->pidx = 0; 709 } 710 711 if (npkt == 0 && npkt_remaining == 0) { 712 /* All done. */ 713 if (lazy_tx_credit_flush == 0) { 714 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 715 F_FW_WR_EQUIQ); 716 nm_txq->equeqidx = nm_txq->pidx; 717 nm_txq->equiqidx = nm_txq->pidx; 718 } 719 ring_nm_txq_db(sc, nm_txq); 720 return; 721 } 722 723 if (NMIDXDIFF(nm_txq, equiqidx) >= nm_txq->sidx / 2) { 724 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 725 F_FW_WR_EQUIQ); 726 nm_txq->equeqidx = nm_txq->pidx; 727 nm_txq->equiqidx = nm_txq->pidx; 728 } else if (NMIDXDIFF(nm_txq, equeqidx) >= 64) { 729 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); 730 nm_txq->equeqidx = nm_txq->pidx; 731 } 732 if (NMIDXDIFF(nm_txq, dbidx) >= 2 * SGE_MAX_WR_NDESC) 733 ring_nm_txq_db(sc, nm_txq); 734 } 735 736 /* Will get called again. */ 737 MPASS(npkt_remaining); 738 } 739 740 /* How many contiguous free descriptors starting at pidx */ 741 static inline int 742 contiguous_ndesc_available(struct sge_nm_txq *nm_txq) 743 { 744 745 if (nm_txq->cidx > nm_txq->pidx) 746 return (nm_txq->cidx - nm_txq->pidx - 1); 747 else if (nm_txq->cidx > 0) 748 return (nm_txq->sidx - nm_txq->pidx); 749 else 750 return (nm_txq->sidx - nm_txq->pidx - 1); 751 } 752 753 static int 754 reclaim_nm_tx_desc(struct sge_nm_txq *nm_txq) 755 { 756 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx]; 757 uint16_t hw_cidx = spg->cidx; /* snapshot */ 758 struct fw_eth_tx_pkts_wr *wr; 759 int n = 0; 760 761 hw_cidx = be16toh(hw_cidx); 762 763 while (nm_txq->cidx != hw_cidx) { 764 wr = (void *)&nm_txq->desc[nm_txq->cidx]; 765 766 MPASS(wr->op_pkd == htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR))); 767 MPASS(wr->type == 1); 768 MPASS(wr->npkt > 0 && wr->npkt <= MAX_NPKT_IN_TYPE1_WR); 769 770 n += wr->npkt; 771 nm_txq->cidx += npkt_to_ndesc(wr->npkt); 772 773 /* 774 * We never sent a WR that wrapped around so the credits coming 775 * back, WR by WR, should never cause the cidx to wrap around 776 * either. 777 */ 778 MPASS(nm_txq->cidx <= nm_txq->sidx); 779 if (__predict_false(nm_txq->cidx == nm_txq->sidx)) 780 nm_txq->cidx = 0; 781 } 782 783 return (n); 784 } 785 786 static int 787 cxgbe_netmap_txsync(struct netmap_kring *kring, int flags) 788 { 789 struct netmap_adapter *na = kring->na; 790 struct ifnet *ifp = na->ifp; 791 struct port_info *pi = ifp->if_softc; 792 struct adapter *sc = pi->adapter; 793 struct sge_nm_txq *nm_txq = &sc->sge.nm_txq[pi->first_nm_txq + kring->ring_id]; 794 const u_int head = kring->rhead; 795 u_int reclaimed = 0; 796 int n, d, npkt_remaining, ndesc_remaining; 797 798 /* 799 * Tx was at kring->nr_hwcur last time around and now we need to advance 800 * to kring->rhead. Note that the driver's pidx moves independent of 801 * netmap's kring->nr_hwcur (pidx counts descriptors and the relation 802 * between descriptors and frames isn't 1:1). 803 */ 804 805 npkt_remaining = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 806 kring->nkr_num_slots - kring->nr_hwcur + head; 807 while (npkt_remaining) { 808 reclaimed += reclaim_nm_tx_desc(nm_txq); 809 ndesc_remaining = contiguous_ndesc_available(nm_txq); 810 /* Can't run out of descriptors with packets still remaining */ 811 MPASS(ndesc_remaining > 0); 812 813 /* # of desc needed to tx all remaining packets */ 814 d = (npkt_remaining / MAX_NPKT_IN_TYPE1_WR) * SGE_MAX_WR_NDESC; 815 if (npkt_remaining % MAX_NPKT_IN_TYPE1_WR) 816 d += npkt_to_ndesc(npkt_remaining % MAX_NPKT_IN_TYPE1_WR); 817 818 if (d <= ndesc_remaining) 819 n = npkt_remaining; 820 else { 821 /* Can't send all, calculate how many can be sent */ 822 n = (ndesc_remaining / SGE_MAX_WR_NDESC) * 823 MAX_NPKT_IN_TYPE1_WR; 824 if (ndesc_remaining % SGE_MAX_WR_NDESC) 825 n += ndesc_to_npkt(ndesc_remaining % SGE_MAX_WR_NDESC); 826 } 827 828 /* Send n packets and update nm_txq->pidx and kring->nr_hwcur */ 829 npkt_remaining -= n; 830 cxgbe_nm_tx(sc, nm_txq, kring, n, npkt_remaining); 831 } 832 MPASS(npkt_remaining == 0); 833 MPASS(kring->nr_hwcur == head); 834 MPASS(nm_txq->dbidx == nm_txq->pidx); 835 836 /* 837 * Second part: reclaim buffers for completed transmissions. 838 */ 839 if (reclaimed || flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { 840 reclaimed += reclaim_nm_tx_desc(nm_txq); 841 kring->nr_hwtail += reclaimed; 842 if (kring->nr_hwtail >= kring->nkr_num_slots) 843 kring->nr_hwtail -= kring->nkr_num_slots; 844 } 845 846 nm_txsync_finalize(kring); 847 848 return (0); 849 } 850 851 static int 852 cxgbe_netmap_rxsync(struct netmap_kring *kring, int flags) 853 { 854 struct netmap_adapter *na = kring->na; 855 struct netmap_ring *ring = kring->ring; 856 struct ifnet *ifp = na->ifp; 857 struct port_info *pi = ifp->if_softc; 858 struct adapter *sc = pi->adapter; 859 struct sge_nm_rxq *nm_rxq = &sc->sge.nm_rxq[pi->first_nm_rxq + kring->ring_id]; 860 u_int const head = nm_rxsync_prologue(kring); 861 u_int n; 862 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 863 864 if (netmap_no_pendintr || force_update) { 865 kring->nr_hwtail = atomic_load_acq_32(&nm_rxq->fl_cidx); 866 kring->nr_kflags &= ~NKR_PENDINTR; 867 } 868 869 /* Userspace done with buffers from kring->nr_hwcur to head */ 870 n = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 871 kring->nkr_num_slots - kring->nr_hwcur + head; 872 n &= ~7U; 873 if (n > 0) { 874 u_int fl_pidx = nm_rxq->fl_pidx; 875 struct netmap_slot *slot = &ring->slot[fl_pidx]; 876 uint64_t ba; 877 int i, dbinc = 0, hwidx = nm_rxq->fl_hwidx; 878 879 /* 880 * We always deal with 8 buffers at a time. We must have 881 * stopped at an 8B boundary (fl_pidx) last time around and we 882 * must have a multiple of 8B buffers to give to the freelist. 883 */ 884 MPASS((fl_pidx & 7) == 0); 885 MPASS((n & 7) == 0); 886 887 IDXINCR(kring->nr_hwcur, n, kring->nkr_num_slots); 888 IDXINCR(nm_rxq->fl_pidx, n, nm_rxq->fl_sidx); 889 890 while (n > 0) { 891 for (i = 0; i < 8; i++, fl_pidx++, slot++) { 892 PNMB(na, slot, &ba); 893 nm_rxq->fl_desc[fl_pidx] = htobe64(ba | hwidx); 894 slot->flags &= ~NS_BUF_CHANGED; 895 MPASS(fl_pidx <= nm_rxq->fl_sidx); 896 } 897 n -= 8; 898 if (fl_pidx == nm_rxq->fl_sidx) { 899 fl_pidx = 0; 900 slot = &ring->slot[0]; 901 } 902 if (++dbinc == 8 && n >= 32) { 903 wmb(); 904 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 905 nm_rxq->fl_db_val | V_PIDX(dbinc)); 906 dbinc = 0; 907 } 908 } 909 MPASS(nm_rxq->fl_pidx == fl_pidx); 910 911 if (dbinc > 0) { 912 wmb(); 913 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 914 nm_rxq->fl_db_val | V_PIDX(dbinc)); 915 } 916 } 917 918 nm_rxsync_finalize(kring); 919 920 return (0); 921 } 922 923 /* 924 * Create an ifnet solely for netmap use and register it with the kernel. 925 */ 926 int 927 create_netmap_ifnet(struct port_info *pi) 928 { 929 struct adapter *sc = pi->adapter; 930 struct netmap_adapter na; 931 struct ifnet *ifp; 932 device_t dev = pi->dev; 933 uint8_t mac[ETHER_ADDR_LEN]; 934 int rc; 935 936 if (pi->nnmtxq <= 0 || pi->nnmrxq <= 0) 937 return (0); 938 MPASS(pi->nm_ifp == NULL); 939 940 /* 941 * Allocate a virtual interface exclusively for netmap use. Give it the 942 * MAC address normally reserved for use by a TOE interface. (The TOE 943 * driver on FreeBSD doesn't use it). 944 */ 945 rc = t4_alloc_vi_func(sc, sc->mbox, pi->tx_chan, sc->pf, 0, 1, &mac[0], 946 &pi->nm_rss_size, FW_VI_FUNC_OFLD, 0); 947 if (rc < 0) { 948 device_printf(dev, "unable to allocate netmap virtual " 949 "interface for port %d: %d\n", pi->port_id, -rc); 950 return (-rc); 951 } 952 pi->nm_viid = rc; 953 pi->nm_xact_addr_filt = -1; 954 955 ifp = if_alloc(IFT_ETHER); 956 if (ifp == NULL) { 957 device_printf(dev, "Cannot allocate netmap ifnet\n"); 958 return (ENOMEM); 959 } 960 pi->nm_ifp = ifp; 961 ifp->if_softc = pi; 962 963 if_initname(ifp, is_t4(pi->adapter) ? "ncxgbe" : "ncxl", 964 device_get_unit(dev)); 965 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 966 967 ifp->if_init = cxgbe_nm_init; 968 ifp->if_ioctl = cxgbe_nm_ioctl; 969 ifp->if_transmit = cxgbe_nm_transmit; 970 ifp->if_qflush = cxgbe_nm_qflush; 971 972 /* 973 * netmap(4) says "netmap does not use features such as checksum 974 * offloading, TCP segmentation offloading, encryption, VLAN 975 * encapsulation/decapsulation, etc." 976 * 977 * By default we comply with the statement above. But we do declare the 978 * ifnet capable of L3/L4 checksumming so that a user can override 979 * netmap and have the hardware do the L3/L4 checksums. 980 */ 981 ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_JUMBO_MTU | 982 IFCAP_HWCSUM_IPV6; 983 ifp->if_capenable = 0; 984 ifp->if_hwassist = 0; 985 986 /* nm_media has already been setup by the caller */ 987 988 ether_ifattach(ifp, mac); 989 990 /* 991 * Register with netmap in the kernel. 992 */ 993 bzero(&na, sizeof(na)); 994 995 na.ifp = pi->nm_ifp; 996 na.na_flags = NAF_BDG_MAYSLEEP; 997 998 /* Netmap doesn't know about the space reserved for the status page. */ 999 na.num_tx_desc = pi->qsize_txq - spg_len / EQ_ESIZE; 1000 1001 /* 1002 * The freelist's cidx/pidx drives netmap's rx cidx/pidx. So 1003 * num_rx_desc is based on the number of buffers that can be held in the 1004 * freelist, and not the number of entries in the iq. (These two are 1005 * not exactly the same due to the space taken up by the status page). 1006 */ 1007 na.num_rx_desc = (pi->qsize_rxq / 8) * 8; 1008 na.nm_txsync = cxgbe_netmap_txsync; 1009 na.nm_rxsync = cxgbe_netmap_rxsync; 1010 na.nm_register = cxgbe_netmap_reg; 1011 na.num_tx_rings = pi->nnmtxq; 1012 na.num_rx_rings = pi->nnmrxq; 1013 netmap_attach(&na); /* This adds IFCAP_NETMAP to if_capabilities */ 1014 1015 return (0); 1016 } 1017 1018 int 1019 destroy_netmap_ifnet(struct port_info *pi) 1020 { 1021 struct adapter *sc = pi->adapter; 1022 1023 if (pi->nm_ifp == NULL) 1024 return (0); 1025 1026 netmap_detach(pi->nm_ifp); 1027 ifmedia_removeall(&pi->nm_media); 1028 ether_ifdetach(pi->nm_ifp); 1029 if_free(pi->nm_ifp); 1030 t4_free_vi(sc, sc->mbox, sc->pf, 0, pi->nm_viid); 1031 1032 return (0); 1033 } 1034 1035 static void 1036 handle_nm_fw6_msg(struct adapter *sc, struct ifnet *ifp, 1037 const struct cpl_fw6_msg *cpl) 1038 { 1039 const struct cpl_sge_egr_update *egr; 1040 uint32_t oq; 1041 struct sge_nm_txq *nm_txq; 1042 1043 if (cpl->type != FW_TYPE_RSSCPL && cpl->type != FW6_TYPE_RSSCPL) 1044 panic("%s: FW_TYPE 0x%x on nm_rxq.", __func__, cpl->type); 1045 1046 /* data[0] is RSS header */ 1047 egr = (const void *)&cpl->data[1]; 1048 oq = be32toh(egr->opcode_qid); 1049 MPASS(G_CPL_OPCODE(oq) == CPL_SGE_EGR_UPDATE); 1050 nm_txq = (void *)sc->sge.eqmap[G_EGR_QID(oq) - sc->sge.eq_start]; 1051 1052 netmap_tx_irq(ifp, nm_txq->nid); 1053 } 1054 1055 void 1056 t4_nm_intr(void *arg) 1057 { 1058 struct sge_nm_rxq *nm_rxq = arg; 1059 struct port_info *pi = nm_rxq->pi; 1060 struct adapter *sc = pi->adapter; 1061 struct ifnet *ifp = pi->nm_ifp; 1062 struct netmap_adapter *na = NA(ifp); 1063 struct netmap_kring *kring = &na->rx_rings[nm_rxq->nid]; 1064 struct netmap_ring *ring = kring->ring; 1065 struct iq_desc *d = &nm_rxq->iq_desc[nm_rxq->iq_cidx]; 1066 uint32_t lq; 1067 u_int n = 0; 1068 int processed = 0; 1069 uint8_t opcode; 1070 uint32_t fl_cidx = atomic_load_acq_32(&nm_rxq->fl_cidx); 1071 1072 while ((d->rsp.u.type_gen & F_RSPD_GEN) == nm_rxq->iq_gen) { 1073 1074 rmb(); 1075 1076 lq = be32toh(d->rsp.pldbuflen_qid); 1077 opcode = d->rss.opcode; 1078 1079 switch (G_RSPD_TYPE(d->rsp.u.type_gen)) { 1080 case X_RSPD_TYPE_FLBUF: 1081 /* No buffer packing so new buf every time */ 1082 MPASS(lq & F_RSPD_NEWBUF); 1083 1084 /* fall through */ 1085 1086 case X_RSPD_TYPE_CPL: 1087 MPASS(opcode < NUM_CPL_CMDS); 1088 1089 switch (opcode) { 1090 case CPL_FW4_MSG: 1091 case CPL_FW6_MSG: 1092 handle_nm_fw6_msg(sc, ifp, 1093 (const void *)&d->cpl[0]); 1094 break; 1095 case CPL_RX_PKT: 1096 ring->slot[fl_cidx].len = G_RSPD_LEN(lq) - fl_pktshift; 1097 ring->slot[fl_cidx].flags = kring->nkr_slot_flags; 1098 if (__predict_false(++fl_cidx == nm_rxq->fl_sidx)) 1099 fl_cidx = 0; 1100 break; 1101 default: 1102 panic("%s: unexpected opcode 0x%x on nm_rxq %p", 1103 __func__, opcode, nm_rxq); 1104 } 1105 break; 1106 1107 case X_RSPD_TYPE_INTR: 1108 /* Not equipped to handle forwarded interrupts. */ 1109 panic("%s: netmap queue received interrupt for iq %u\n", 1110 __func__, lq); 1111 1112 default: 1113 panic("%s: illegal response type %d on nm_rxq %p", 1114 __func__, G_RSPD_TYPE(d->rsp.u.type_gen), nm_rxq); 1115 } 1116 1117 d++; 1118 if (__predict_false(++nm_rxq->iq_cidx == nm_rxq->iq_sidx)) { 1119 nm_rxq->iq_cidx = 0; 1120 d = &nm_rxq->iq_desc[0]; 1121 nm_rxq->iq_gen ^= F_RSPD_GEN; 1122 } 1123 1124 if (__predict_false(++n == 64)) { /* XXXNM: tune */ 1125 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 1126 V_CIDXINC(n) | V_INGRESSQID(nm_rxq->iq_cntxt_id) | 1127 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 1128 n = 0; 1129 } 1130 } 1131 if (fl_cidx != nm_rxq->fl_cidx) { 1132 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx); 1133 netmap_rx_irq(ifp, nm_rxq->nid, &processed); 1134 } 1135 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(n) | 1136 V_INGRESSQID((u32)nm_rxq->iq_cntxt_id) | V_SEINTARM(F_QINTR_CNT_EN)); 1137 } 1138 #endif 1139