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 60 SYSCTL_NODE(_hw, OID_AUTO, cxgbe, CTLFLAG_RD, 0, "cxgbe netmap parameters"); 61 62 /* 63 * 0 = normal netmap rx 64 * 1 = black hole 65 * 2 = supermassive black hole (buffer packing enabled) 66 */ 67 int black_hole = 0; 68 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_black_hole, CTLFLAG_RDTUN, &black_hole, 0, 69 "Sink incoming packets."); 70 71 int rx_ndesc = 256; 72 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_rx_ndesc, CTLFLAG_RWTUN, 73 &rx_ndesc, 0, "# of rx descriptors after which the hw cidx is updated."); 74 75 int rx_nframes = 64; 76 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_rx_nframes, CTLFLAG_RWTUN, 77 &rx_nframes, 0, "max # of frames received before waking up netmap rx."); 78 79 int holdoff_tmr_idx = 2; 80 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_holdoff_tmr_idx, CTLFLAG_RWTUN, 81 &holdoff_tmr_idx, 0, "Holdoff timer index for netmap rx queues."); 82 83 /* 84 * Congestion drops. 85 * -1: no congestion feedback (not recommended). 86 * 0: backpressure the channel instead of dropping packets right away. 87 * 1: no backpressure, drop packets for the congested queue immediately. 88 */ 89 static int nm_cong_drop = 1; 90 TUNABLE_INT("hw.cxgbe.nm_cong_drop", &nm_cong_drop); 91 92 int starve_fl = 0; 93 SYSCTL_INT(_hw_cxgbe, OID_AUTO, starve_fl, CTLFLAG_RWTUN, 94 &starve_fl, 0, "Don't ring fl db for netmap rx queues."); 95 96 /* 97 * Try to process tx credits in bulk. This may cause a delay in the return of 98 * tx credits and is suitable for bursty or non-stop tx only. 99 */ 100 int lazy_tx_credit_flush = 1; 101 SYSCTL_INT(_hw_cxgbe, OID_AUTO, lazy_tx_credit_flush, CTLFLAG_RWTUN, 102 &lazy_tx_credit_flush, 0, "lazy credit flush for netmap tx queues."); 103 104 static int 105 alloc_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq, int cong) 106 { 107 int rc, cntxt_id, i; 108 __be32 v; 109 struct adapter *sc = vi->pi->adapter; 110 struct sge_params *sp = &sc->params.sge; 111 struct netmap_adapter *na = NA(vi->ifp); 112 struct fw_iq_cmd c; 113 114 MPASS(na != NULL); 115 MPASS(nm_rxq->iq_desc != NULL); 116 MPASS(nm_rxq->fl_desc != NULL); 117 118 bzero(nm_rxq->iq_desc, vi->qsize_rxq * IQ_ESIZE); 119 bzero(nm_rxq->fl_desc, na->num_rx_desc * EQ_ESIZE + sp->spg_len); 120 121 bzero(&c, sizeof(c)); 122 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 123 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 124 V_FW_IQ_CMD_VFN(0)); 125 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 126 FW_LEN16(c)); 127 MPASS(!forwarding_intr_to_fwq(sc)); 128 KASSERT(nm_rxq->intr_idx < sc->intr_count, 129 ("%s: invalid direct intr_idx %d", __func__, nm_rxq->intr_idx)); 130 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx); 131 c.type_to_iqandstindex = htobe32(v | 132 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 133 V_FW_IQ_CMD_VIID(vi->viid) | 134 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 135 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(vi->pi->tx_chan) | 136 F_FW_IQ_CMD_IQGTSMODE | 137 V_FW_IQ_CMD_IQINTCNTTHRESH(0) | 138 V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4)); 139 c.iqsize = htobe16(vi->qsize_rxq); 140 c.iqaddr = htobe64(nm_rxq->iq_ba); 141 if (cong >= 0) { 142 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN | 143 V_FW_IQ_CMD_FL0CNGCHMAP(cong) | F_FW_IQ_CMD_FL0CONGCIF | 144 F_FW_IQ_CMD_FL0CONGEN); 145 } 146 c.iqns_to_fl0congen |= 147 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 148 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 149 (fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0) | 150 (black_hole == 2 ? F_FW_IQ_CMD_FL0PACKEN : 0)); 151 c.fl0dcaen_to_fl0cidxfthresh = 152 htobe16(V_FW_IQ_CMD_FL0FBMIN(chip_id(sc) <= CHELSIO_T5 ? 153 X_FETCHBURSTMIN_128B : X_FETCHBURSTMIN_64B) | 154 V_FW_IQ_CMD_FL0FBMAX(chip_id(sc) <= CHELSIO_T5 ? 155 X_FETCHBURSTMAX_512B : X_FETCHBURSTMAX_256B)); 156 c.fl0size = htobe16(na->num_rx_desc / 8 + sp->spg_len / EQ_ESIZE); 157 c.fl0addr = htobe64(nm_rxq->fl_ba); 158 159 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 160 if (rc != 0) { 161 device_printf(sc->dev, 162 "failed to create netmap ingress queue: %d\n", rc); 163 return (rc); 164 } 165 166 nm_rxq->iq_cidx = 0; 167 MPASS(nm_rxq->iq_sidx == vi->qsize_rxq - sp->spg_len / IQ_ESIZE); 168 nm_rxq->iq_gen = F_RSPD_GEN; 169 nm_rxq->iq_cntxt_id = be16toh(c.iqid); 170 nm_rxq->iq_abs_id = be16toh(c.physiqid); 171 cntxt_id = nm_rxq->iq_cntxt_id - sc->sge.iq_start; 172 if (cntxt_id >= sc->sge.niq) { 173 panic ("%s: nm_rxq->iq_cntxt_id (%d) more than the max (%d)", 174 __func__, cntxt_id, sc->sge.niq - 1); 175 } 176 sc->sge.iqmap[cntxt_id] = (void *)nm_rxq; 177 178 nm_rxq->fl_cntxt_id = be16toh(c.fl0id); 179 nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0; 180 MPASS(nm_rxq->fl_sidx == na->num_rx_desc); 181 cntxt_id = nm_rxq->fl_cntxt_id - sc->sge.eq_start; 182 if (cntxt_id >= sc->sge.neq) { 183 panic("%s: nm_rxq->fl_cntxt_id (%d) more than the max (%d)", 184 __func__, cntxt_id, sc->sge.neq - 1); 185 } 186 sc->sge.eqmap[cntxt_id] = (void *)nm_rxq; 187 188 nm_rxq->fl_db_val = V_QID(nm_rxq->fl_cntxt_id) | 189 sc->chip_params->sge_fl_db; 190 191 if (chip_id(sc) >= CHELSIO_T5 && cong >= 0) { 192 uint32_t param, val; 193 194 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 195 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 196 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); 197 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 198 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 199 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); 200 if (cong == 0) 201 val = 1 << 19; 202 else { 203 val = 2 << 19; 204 for (i = 0; i < 4; i++) { 205 if (cong & (1 << i)) 206 val |= 1 << (i << 2); 207 } 208 } 209 210 rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val); 211 if (rc != 0) { 212 /* report error but carry on */ 213 device_printf(sc->dev, 214 "failed to set congestion manager context for " 215 "ingress queue %d: %d\n", nm_rxq->iq_cntxt_id, rc); 216 } 217 } 218 219 t4_write_reg(sc, sc->sge_gts_reg, 220 V_INGRESSQID(nm_rxq->iq_cntxt_id) | 221 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx))); 222 223 return (rc); 224 } 225 226 static int 227 free_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq) 228 { 229 struct adapter *sc = vi->pi->adapter; 230 int rc; 231 232 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, FW_IQ_TYPE_FL_INT_CAP, 233 nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, 0xffff); 234 if (rc != 0) 235 device_printf(sc->dev, "%s: failed for iq %d, fl %d: %d\n", 236 __func__, nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, rc); 237 nm_rxq->iq_cntxt_id = INVALID_NM_RXQ_CNTXT_ID; 238 return (rc); 239 } 240 241 static int 242 alloc_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq) 243 { 244 int rc, cntxt_id; 245 size_t len; 246 struct adapter *sc = vi->pi->adapter; 247 struct netmap_adapter *na = NA(vi->ifp); 248 struct fw_eq_eth_cmd c; 249 250 MPASS(na != NULL); 251 MPASS(nm_txq->desc != NULL); 252 253 len = na->num_tx_desc * EQ_ESIZE + sc->params.sge.spg_len; 254 bzero(nm_txq->desc, len); 255 256 bzero(&c, sizeof(c)); 257 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 258 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 259 V_FW_EQ_ETH_CMD_VFN(0)); 260 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 261 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 262 c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE | 263 F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(vi->viid)); 264 c.fetchszm_to_iqid = 265 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 266 V_FW_EQ_ETH_CMD_PCIECHN(vi->pi->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 267 V_FW_EQ_ETH_CMD_IQID(sc->sge.nm_rxq[nm_txq->iqidx].iq_cntxt_id)); 268 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 269 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 270 V_FW_EQ_ETH_CMD_EQSIZE(len / EQ_ESIZE)); 271 c.eqaddr = htobe64(nm_txq->ba); 272 273 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 274 if (rc != 0) { 275 device_printf(vi->dev, 276 "failed to create netmap egress queue: %d\n", rc); 277 return (rc); 278 } 279 280 nm_txq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 281 cntxt_id = nm_txq->cntxt_id - sc->sge.eq_start; 282 if (cntxt_id >= sc->sge.neq) 283 panic("%s: nm_txq->cntxt_id (%d) more than the max (%d)", __func__, 284 cntxt_id, sc->sge.neq - 1); 285 sc->sge.eqmap[cntxt_id] = (void *)nm_txq; 286 287 nm_txq->pidx = nm_txq->cidx = 0; 288 MPASS(nm_txq->sidx == na->num_tx_desc); 289 nm_txq->equiqidx = nm_txq->equeqidx = nm_txq->dbidx = 0; 290 291 nm_txq->doorbells = sc->doorbells; 292 if (isset(&nm_txq->doorbells, DOORBELL_UDB) || 293 isset(&nm_txq->doorbells, DOORBELL_UDBWC) || 294 isset(&nm_txq->doorbells, DOORBELL_WCWR)) { 295 uint32_t s_qpp = sc->params.sge.eq_s_qpp; 296 uint32_t mask = (1 << s_qpp) - 1; 297 volatile uint8_t *udb; 298 299 udb = sc->udbs_base + UDBS_DB_OFFSET; 300 udb += (nm_txq->cntxt_id >> s_qpp) << PAGE_SHIFT; 301 nm_txq->udb_qid = nm_txq->cntxt_id & mask; 302 if (nm_txq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE) 303 clrbit(&nm_txq->doorbells, DOORBELL_WCWR); 304 else { 305 udb += nm_txq->udb_qid << UDBS_SEG_SHIFT; 306 nm_txq->udb_qid = 0; 307 } 308 nm_txq->udb = (volatile void *)udb; 309 } 310 311 return (rc); 312 } 313 314 static int 315 free_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq) 316 { 317 struct adapter *sc = vi->pi->adapter; 318 int rc; 319 320 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, nm_txq->cntxt_id); 321 if (rc != 0) 322 device_printf(sc->dev, "%s: failed for eq %d: %d\n", __func__, 323 nm_txq->cntxt_id, rc); 324 nm_txq->cntxt_id = INVALID_NM_TXQ_CNTXT_ID; 325 return (rc); 326 } 327 328 static int 329 cxgbe_netmap_on(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp, 330 struct netmap_adapter *na) 331 { 332 struct netmap_slot *slot; 333 struct netmap_kring *kring; 334 struct sge_nm_rxq *nm_rxq; 335 struct sge_nm_txq *nm_txq; 336 int rc, i, j, hwidx; 337 struct hw_buf_info *hwb; 338 339 ASSERT_SYNCHRONIZED_OP(sc); 340 341 if ((vi->flags & VI_INIT_DONE) == 0 || 342 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 343 return (EAGAIN); 344 345 hwb = &sc->sge.hw_buf_info[0]; 346 for (i = 0; i < SGE_FLBUF_SIZES; i++, hwb++) { 347 if (hwb->size == NETMAP_BUF_SIZE(na)) 348 break; 349 } 350 if (i >= SGE_FLBUF_SIZES) { 351 if_printf(ifp, "no hwidx for netmap buffer size %d.\n", 352 NETMAP_BUF_SIZE(na)); 353 return (ENXIO); 354 } 355 hwidx = i; 356 357 /* Must set caps before calling netmap_reset */ 358 nm_set_native_flags(na); 359 360 for_each_nm_rxq(vi, i, nm_rxq) { 361 kring = na->rx_rings[nm_rxq->nid]; 362 if (!nm_kring_pending_on(kring) || 363 nm_rxq->iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID) 364 continue; 365 366 alloc_nm_rxq_hwq(vi, nm_rxq, tnl_cong(vi->pi, nm_cong_drop)); 367 nm_rxq->fl_hwidx = hwidx; 368 slot = netmap_reset(na, NR_RX, i, 0); 369 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 370 371 /* We deal with 8 bufs at a time */ 372 MPASS((na->num_rx_desc & 7) == 0); 373 MPASS(na->num_rx_desc == nm_rxq->fl_sidx); 374 for (j = 0; j < nm_rxq->fl_sidx; j++) { 375 uint64_t ba; 376 377 PNMB(na, &slot[j], &ba); 378 MPASS(ba != 0); 379 nm_rxq->fl_desc[j] = htobe64(ba | hwidx); 380 } 381 j = nm_rxq->fl_pidx = nm_rxq->fl_sidx - 8; 382 MPASS((j & 7) == 0); 383 j /= 8; /* driver pidx to hardware pidx */ 384 wmb(); 385 t4_write_reg(sc, sc->sge_kdoorbell_reg, 386 nm_rxq->fl_db_val | V_PIDX(j)); 387 388 (void) atomic_cmpset_int(&nm_rxq->nm_state, NM_OFF, NM_ON); 389 } 390 391 for_each_nm_txq(vi, i, nm_txq) { 392 kring = na->tx_rings[nm_txq->nid]; 393 if (!nm_kring_pending_on(kring) || 394 nm_txq->cntxt_id != INVALID_NM_TXQ_CNTXT_ID) 395 continue; 396 397 alloc_nm_txq_hwq(vi, nm_txq); 398 slot = netmap_reset(na, NR_TX, i, 0); 399 MPASS(slot != NULL); /* XXXNM: error check, not assert */ 400 } 401 402 if (vi->nm_rss == NULL) { 403 vi->nm_rss = malloc(vi->rss_size * sizeof(uint16_t), M_CXGBE, 404 M_ZERO | M_WAITOK); 405 } 406 for (i = 0; i < vi->rss_size;) { 407 for_each_nm_rxq(vi, j, nm_rxq) { 408 vi->nm_rss[i++] = nm_rxq->iq_abs_id; 409 if (i == vi->rss_size) 410 break; 411 } 412 } 413 rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size, 414 vi->nm_rss, vi->rss_size); 415 if (rc != 0) 416 if_printf(ifp, "netmap rss_config failed: %d\n", rc); 417 418 rc = -t4_config_vi_rss(sc, sc->mbox, vi->viid, vi->hashen, 419 vi->nm_rss[0], 0, 0); 420 if (rc != 0) 421 if_printf(ifp, "netmap rss hash/defaultq config failed: %d\n", rc); 422 423 return (rc); 424 } 425 426 static int 427 cxgbe_netmap_off(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp, 428 struct netmap_adapter *na) 429 { 430 struct netmap_kring *kring; 431 int rc, i; 432 struct sge_nm_txq *nm_txq; 433 struct sge_nm_rxq *nm_rxq; 434 435 ASSERT_SYNCHRONIZED_OP(sc); 436 437 if ((vi->flags & VI_INIT_DONE) == 0) 438 return (0); 439 440 rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size, 441 vi->rss, vi->rss_size); 442 if (rc != 0) 443 if_printf(ifp, "failed to restore RSS config: %d\n", rc); 444 rc = -t4_config_vi_rss(sc, sc->mbox, vi->viid, vi->hashen, vi->rss[0], 0, 0); 445 if (rc != 0) 446 if_printf(ifp, "failed to restore RSS hash/defaultq: %d\n", rc); 447 nm_clear_native_flags(na); 448 449 for_each_nm_txq(vi, i, nm_txq) { 450 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx]; 451 452 kring = na->tx_rings[nm_txq->nid]; 453 if (!nm_kring_pending_off(kring) || 454 nm_txq->cntxt_id == INVALID_NM_TXQ_CNTXT_ID) 455 continue; 456 457 /* Wait for hw pidx to catch up ... */ 458 while (be16toh(nm_txq->pidx) != spg->pidx) 459 pause("nmpidx", 1); 460 461 /* ... and then for the cidx. */ 462 while (spg->pidx != spg->cidx) 463 pause("nmcidx", 1); 464 465 free_nm_txq_hwq(vi, nm_txq); 466 } 467 for_each_nm_rxq(vi, i, nm_rxq) { 468 kring = na->rx_rings[nm_rxq->nid]; 469 if (!nm_kring_pending_off(kring) || 470 nm_rxq->iq_cntxt_id == INVALID_NM_RXQ_CNTXT_ID) 471 continue; 472 473 while (!atomic_cmpset_int(&nm_rxq->nm_state, NM_ON, NM_OFF)) 474 pause("nmst", 1); 475 476 free_nm_rxq_hwq(vi, nm_rxq); 477 } 478 479 return (rc); 480 } 481 482 static int 483 cxgbe_netmap_reg(struct netmap_adapter *na, int on) 484 { 485 struct ifnet *ifp = na->ifp; 486 struct vi_info *vi = ifp->if_softc; 487 struct adapter *sc = vi->pi->adapter; 488 int rc; 489 490 rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nmreg"); 491 if (rc != 0) 492 return (rc); 493 if (on) 494 rc = cxgbe_netmap_on(sc, vi, ifp, na); 495 else 496 rc = cxgbe_netmap_off(sc, vi, ifp, na); 497 end_synchronized_op(sc, 0); 498 499 return (rc); 500 } 501 502 /* How many packets can a single type1 WR carry in n descriptors */ 503 static inline int 504 ndesc_to_npkt(const int n) 505 { 506 507 MPASS(n > 0 && n <= SGE_MAX_WR_NDESC); 508 509 return (n * 2 - 1); 510 } 511 #define MAX_NPKT_IN_TYPE1_WR (ndesc_to_npkt(SGE_MAX_WR_NDESC)) 512 513 /* Space (in descriptors) needed for a type1 WR that carries n packets */ 514 static inline int 515 npkt_to_ndesc(const int n) 516 { 517 518 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 519 520 return ((n + 2) / 2); 521 } 522 523 /* Space (in 16B units) needed for a type1 WR that carries n packets */ 524 static inline int 525 npkt_to_len16(const int n) 526 { 527 528 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR); 529 530 return (n * 2 + 1); 531 } 532 533 #define NMIDXDIFF(q, idx) IDXDIFF((q)->pidx, (q)->idx, (q)->sidx) 534 535 static void 536 ring_nm_txq_db(struct adapter *sc, struct sge_nm_txq *nm_txq) 537 { 538 int n; 539 u_int db = nm_txq->doorbells; 540 541 MPASS(nm_txq->pidx != nm_txq->dbidx); 542 543 n = NMIDXDIFF(nm_txq, dbidx); 544 if (n > 1) 545 clrbit(&db, DOORBELL_WCWR); 546 wmb(); 547 548 switch (ffs(db) - 1) { 549 case DOORBELL_UDB: 550 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 551 break; 552 553 case DOORBELL_WCWR: { 554 volatile uint64_t *dst, *src; 555 556 /* 557 * Queues whose 128B doorbell segment fits in the page do not 558 * use relative qid (udb_qid is always 0). Only queues with 559 * doorbell segments can do WCWR. 560 */ 561 KASSERT(nm_txq->udb_qid == 0 && n == 1, 562 ("%s: inappropriate doorbell (0x%x, %d, %d) for nm_txq %p", 563 __func__, nm_txq->doorbells, n, nm_txq->pidx, nm_txq)); 564 565 dst = (volatile void *)((uintptr_t)nm_txq->udb + 566 UDBS_WR_OFFSET - UDBS_DB_OFFSET); 567 src = (void *)&nm_txq->desc[nm_txq->dbidx]; 568 while (src != (void *)&nm_txq->desc[nm_txq->dbidx + 1]) 569 *dst++ = *src++; 570 wmb(); 571 break; 572 } 573 574 case DOORBELL_UDBWC: 575 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n)); 576 wmb(); 577 break; 578 579 case DOORBELL_KDB: 580 t4_write_reg(sc, sc->sge_kdoorbell_reg, 581 V_QID(nm_txq->cntxt_id) | V_PIDX(n)); 582 break; 583 } 584 nm_txq->dbidx = nm_txq->pidx; 585 } 586 587 /* 588 * Write work requests to send 'npkt' frames and ring the doorbell to send them 589 * on their way. No need to check for wraparound. 590 */ 591 static void 592 cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_txq, 593 struct netmap_kring *kring, int npkt, int npkt_remaining, int txcsum) 594 { 595 struct netmap_ring *ring = kring->ring; 596 struct netmap_slot *slot; 597 const u_int lim = kring->nkr_num_slots - 1; 598 struct fw_eth_tx_pkts_wr *wr = (void *)&nm_txq->desc[nm_txq->pidx]; 599 uint16_t len; 600 uint64_t ba; 601 struct cpl_tx_pkt_core *cpl; 602 struct ulptx_sgl *usgl; 603 int i, n; 604 605 while (npkt) { 606 n = min(npkt, MAX_NPKT_IN_TYPE1_WR); 607 len = 0; 608 609 wr = (void *)&nm_txq->desc[nm_txq->pidx]; 610 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 611 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(npkt_to_len16(n))); 612 wr->npkt = n; 613 wr->r3 = 0; 614 wr->type = 1; 615 cpl = (void *)(wr + 1); 616 617 for (i = 0; i < n; i++) { 618 slot = &ring->slot[kring->nr_hwcur]; 619 PNMB(kring->na, slot, &ba); 620 MPASS(ba != 0); 621 622 cpl->ctrl0 = nm_txq->cpl_ctrl0; 623 cpl->pack = 0; 624 cpl->len = htobe16(slot->len); 625 /* 626 * netmap(4) says "netmap does not use features such as 627 * checksum offloading, TCP segmentation offloading, 628 * encryption, VLAN encapsulation/decapsulation, etc." 629 * 630 * So the ncxl interfaces have tx hardware checksumming 631 * disabled by default. But you can override netmap by 632 * enabling IFCAP_TXCSUM on the interface manully. 633 */ 634 cpl->ctrl1 = txcsum ? 0 : 635 htobe64(F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS); 636 637 usgl = (void *)(cpl + 1); 638 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 639 V_ULPTX_NSGE(1)); 640 usgl->len0 = htobe32(slot->len); 641 usgl->addr0 = htobe64(ba); 642 643 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 644 cpl = (void *)(usgl + 1); 645 MPASS(slot->len + len <= UINT16_MAX); 646 len += slot->len; 647 kring->nr_hwcur = nm_next(kring->nr_hwcur, lim); 648 } 649 wr->plen = htobe16(len); 650 651 npkt -= n; 652 nm_txq->pidx += npkt_to_ndesc(n); 653 MPASS(nm_txq->pidx <= nm_txq->sidx); 654 if (__predict_false(nm_txq->pidx == nm_txq->sidx)) { 655 /* 656 * This routine doesn't know how to write WRs that wrap 657 * around. Make sure it wasn't asked to. 658 */ 659 MPASS(npkt == 0); 660 nm_txq->pidx = 0; 661 } 662 663 if (npkt == 0 && npkt_remaining == 0) { 664 /* All done. */ 665 if (lazy_tx_credit_flush == 0) { 666 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 667 F_FW_WR_EQUIQ); 668 nm_txq->equeqidx = nm_txq->pidx; 669 nm_txq->equiqidx = nm_txq->pidx; 670 } 671 ring_nm_txq_db(sc, nm_txq); 672 return; 673 } 674 675 if (NMIDXDIFF(nm_txq, equiqidx) >= nm_txq->sidx / 2) { 676 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | 677 F_FW_WR_EQUIQ); 678 nm_txq->equeqidx = nm_txq->pidx; 679 nm_txq->equiqidx = nm_txq->pidx; 680 } else if (NMIDXDIFF(nm_txq, equeqidx) >= 64) { 681 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); 682 nm_txq->equeqidx = nm_txq->pidx; 683 } 684 if (NMIDXDIFF(nm_txq, dbidx) >= 2 * SGE_MAX_WR_NDESC) 685 ring_nm_txq_db(sc, nm_txq); 686 } 687 688 /* Will get called again. */ 689 MPASS(npkt_remaining); 690 } 691 692 /* How many contiguous free descriptors starting at pidx */ 693 static inline int 694 contiguous_ndesc_available(struct sge_nm_txq *nm_txq) 695 { 696 697 if (nm_txq->cidx > nm_txq->pidx) 698 return (nm_txq->cidx - nm_txq->pidx - 1); 699 else if (nm_txq->cidx > 0) 700 return (nm_txq->sidx - nm_txq->pidx); 701 else 702 return (nm_txq->sidx - nm_txq->pidx - 1); 703 } 704 705 static int 706 reclaim_nm_tx_desc(struct sge_nm_txq *nm_txq) 707 { 708 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx]; 709 uint16_t hw_cidx = spg->cidx; /* snapshot */ 710 struct fw_eth_tx_pkts_wr *wr; 711 int n = 0; 712 713 hw_cidx = be16toh(hw_cidx); 714 715 while (nm_txq->cidx != hw_cidx) { 716 wr = (void *)&nm_txq->desc[nm_txq->cidx]; 717 718 MPASS(wr->op_pkd == htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR))); 719 MPASS(wr->type == 1); 720 MPASS(wr->npkt > 0 && wr->npkt <= MAX_NPKT_IN_TYPE1_WR); 721 722 n += wr->npkt; 723 nm_txq->cidx += npkt_to_ndesc(wr->npkt); 724 725 /* 726 * We never sent a WR that wrapped around so the credits coming 727 * back, WR by WR, should never cause the cidx to wrap around 728 * either. 729 */ 730 MPASS(nm_txq->cidx <= nm_txq->sidx); 731 if (__predict_false(nm_txq->cidx == nm_txq->sidx)) 732 nm_txq->cidx = 0; 733 } 734 735 return (n); 736 } 737 738 static int 739 cxgbe_netmap_txsync(struct netmap_kring *kring, int flags) 740 { 741 struct netmap_adapter *na = kring->na; 742 struct ifnet *ifp = na->ifp; 743 struct vi_info *vi = ifp->if_softc; 744 struct adapter *sc = vi->pi->adapter; 745 struct sge_nm_txq *nm_txq = &sc->sge.nm_txq[vi->first_nm_txq + kring->ring_id]; 746 const u_int head = kring->rhead; 747 u_int reclaimed = 0; 748 int n, d, npkt_remaining, ndesc_remaining, txcsum; 749 750 /* 751 * Tx was at kring->nr_hwcur last time around and now we need to advance 752 * to kring->rhead. Note that the driver's pidx moves independent of 753 * netmap's kring->nr_hwcur (pidx counts descriptors and the relation 754 * between descriptors and frames isn't 1:1). 755 */ 756 757 npkt_remaining = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 758 kring->nkr_num_slots - kring->nr_hwcur + head; 759 txcsum = ifp->if_capenable & (IFCAP_TXCSUM | IFCAP_TXCSUM_IPV6); 760 while (npkt_remaining) { 761 reclaimed += reclaim_nm_tx_desc(nm_txq); 762 ndesc_remaining = contiguous_ndesc_available(nm_txq); 763 /* Can't run out of descriptors with packets still remaining */ 764 MPASS(ndesc_remaining > 0); 765 766 /* # of desc needed to tx all remaining packets */ 767 d = (npkt_remaining / MAX_NPKT_IN_TYPE1_WR) * SGE_MAX_WR_NDESC; 768 if (npkt_remaining % MAX_NPKT_IN_TYPE1_WR) 769 d += npkt_to_ndesc(npkt_remaining % MAX_NPKT_IN_TYPE1_WR); 770 771 if (d <= ndesc_remaining) 772 n = npkt_remaining; 773 else { 774 /* Can't send all, calculate how many can be sent */ 775 n = (ndesc_remaining / SGE_MAX_WR_NDESC) * 776 MAX_NPKT_IN_TYPE1_WR; 777 if (ndesc_remaining % SGE_MAX_WR_NDESC) 778 n += ndesc_to_npkt(ndesc_remaining % SGE_MAX_WR_NDESC); 779 } 780 781 /* Send n packets and update nm_txq->pidx and kring->nr_hwcur */ 782 npkt_remaining -= n; 783 cxgbe_nm_tx(sc, nm_txq, kring, n, npkt_remaining, txcsum); 784 } 785 MPASS(npkt_remaining == 0); 786 MPASS(kring->nr_hwcur == head); 787 MPASS(nm_txq->dbidx == nm_txq->pidx); 788 789 /* 790 * Second part: reclaim buffers for completed transmissions. 791 */ 792 if (reclaimed || flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { 793 reclaimed += reclaim_nm_tx_desc(nm_txq); 794 kring->nr_hwtail += reclaimed; 795 if (kring->nr_hwtail >= kring->nkr_num_slots) 796 kring->nr_hwtail -= kring->nkr_num_slots; 797 } 798 799 return (0); 800 } 801 802 static int 803 cxgbe_netmap_rxsync(struct netmap_kring *kring, int flags) 804 { 805 struct netmap_adapter *na = kring->na; 806 struct netmap_ring *ring = kring->ring; 807 struct ifnet *ifp = na->ifp; 808 struct vi_info *vi = ifp->if_softc; 809 struct adapter *sc = vi->pi->adapter; 810 struct sge_nm_rxq *nm_rxq = &sc->sge.nm_rxq[vi->first_nm_rxq + kring->ring_id]; 811 u_int const head = kring->rhead; 812 u_int n; 813 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 814 815 if (black_hole) 816 return (0); /* No updates ever. */ 817 818 if (netmap_no_pendintr || force_update) { 819 kring->nr_hwtail = atomic_load_acq_32(&nm_rxq->fl_cidx); 820 kring->nr_kflags &= ~NKR_PENDINTR; 821 } 822 823 if (nm_rxq->fl_db_saved > 0 && starve_fl == 0) { 824 wmb(); 825 t4_write_reg(sc, sc->sge_kdoorbell_reg, 826 nm_rxq->fl_db_val | V_PIDX(nm_rxq->fl_db_saved)); 827 nm_rxq->fl_db_saved = 0; 828 } 829 830 /* Userspace done with buffers from kring->nr_hwcur to head */ 831 n = head >= kring->nr_hwcur ? head - kring->nr_hwcur : 832 kring->nkr_num_slots - kring->nr_hwcur + head; 833 n &= ~7U; 834 if (n > 0) { 835 u_int fl_pidx = nm_rxq->fl_pidx; 836 struct netmap_slot *slot = &ring->slot[fl_pidx]; 837 uint64_t ba; 838 int i, dbinc = 0, hwidx = nm_rxq->fl_hwidx; 839 840 /* 841 * We always deal with 8 buffers at a time. We must have 842 * stopped at an 8B boundary (fl_pidx) last time around and we 843 * must have a multiple of 8B buffers to give to the freelist. 844 */ 845 MPASS((fl_pidx & 7) == 0); 846 MPASS((n & 7) == 0); 847 848 IDXINCR(kring->nr_hwcur, n, kring->nkr_num_slots); 849 IDXINCR(nm_rxq->fl_pidx, n, nm_rxq->fl_sidx); 850 851 while (n > 0) { 852 for (i = 0; i < 8; i++, fl_pidx++, slot++) { 853 PNMB(na, slot, &ba); 854 MPASS(ba != 0); 855 nm_rxq->fl_desc[fl_pidx] = htobe64(ba | hwidx); 856 slot->flags &= ~NS_BUF_CHANGED; 857 MPASS(fl_pidx <= nm_rxq->fl_sidx); 858 } 859 n -= 8; 860 if (fl_pidx == nm_rxq->fl_sidx) { 861 fl_pidx = 0; 862 slot = &ring->slot[0]; 863 } 864 if (++dbinc == 8 && n >= 32) { 865 wmb(); 866 if (starve_fl) 867 nm_rxq->fl_db_saved += dbinc; 868 else { 869 t4_write_reg(sc, sc->sge_kdoorbell_reg, 870 nm_rxq->fl_db_val | V_PIDX(dbinc)); 871 } 872 dbinc = 0; 873 } 874 } 875 MPASS(nm_rxq->fl_pidx == fl_pidx); 876 877 if (dbinc > 0) { 878 wmb(); 879 if (starve_fl) 880 nm_rxq->fl_db_saved += dbinc; 881 else { 882 t4_write_reg(sc, sc->sge_kdoorbell_reg, 883 nm_rxq->fl_db_val | V_PIDX(dbinc)); 884 } 885 } 886 } 887 888 return (0); 889 } 890 891 void 892 cxgbe_nm_attach(struct vi_info *vi) 893 { 894 struct port_info *pi; 895 struct adapter *sc; 896 struct netmap_adapter na; 897 898 MPASS(vi->nnmrxq > 0); 899 MPASS(vi->ifp != NULL); 900 901 pi = vi->pi; 902 sc = pi->adapter; 903 904 bzero(&na, sizeof(na)); 905 906 na.ifp = vi->ifp; 907 na.na_flags = NAF_BDG_MAYSLEEP; 908 909 /* Netmap doesn't know about the space reserved for the status page. */ 910 na.num_tx_desc = vi->qsize_txq - sc->params.sge.spg_len / EQ_ESIZE; 911 912 /* 913 * The freelist's cidx/pidx drives netmap's rx cidx/pidx. So 914 * num_rx_desc is based on the number of buffers that can be held in the 915 * freelist, and not the number of entries in the iq. (These two are 916 * not exactly the same due to the space taken up by the status page). 917 */ 918 na.num_rx_desc = rounddown(vi->qsize_rxq, 8); 919 na.nm_txsync = cxgbe_netmap_txsync; 920 na.nm_rxsync = cxgbe_netmap_rxsync; 921 na.nm_register = cxgbe_netmap_reg; 922 na.num_tx_rings = vi->nnmtxq; 923 na.num_rx_rings = vi->nnmrxq; 924 netmap_attach(&na); 925 } 926 927 void 928 cxgbe_nm_detach(struct vi_info *vi) 929 { 930 931 MPASS(vi->nnmrxq > 0); 932 MPASS(vi->ifp != NULL); 933 934 netmap_detach(vi->ifp); 935 } 936 937 static inline const void * 938 unwrap_nm_fw6_msg(const struct cpl_fw6_msg *cpl) 939 { 940 941 MPASS(cpl->type == FW_TYPE_RSSCPL || cpl->type == FW6_TYPE_RSSCPL); 942 943 /* data[0] is RSS header */ 944 return (&cpl->data[1]); 945 } 946 947 static void 948 handle_nm_sge_egr_update(struct adapter *sc, struct ifnet *ifp, 949 const struct cpl_sge_egr_update *egr) 950 { 951 uint32_t oq; 952 struct sge_nm_txq *nm_txq; 953 954 oq = be32toh(egr->opcode_qid); 955 MPASS(G_CPL_OPCODE(oq) == CPL_SGE_EGR_UPDATE); 956 nm_txq = (void *)sc->sge.eqmap[G_EGR_QID(oq) - sc->sge.eq_start]; 957 958 netmap_tx_irq(ifp, nm_txq->nid); 959 } 960 961 void 962 service_nm_rxq(struct sge_nm_rxq *nm_rxq) 963 { 964 struct vi_info *vi = nm_rxq->vi; 965 struct adapter *sc = vi->pi->adapter; 966 struct ifnet *ifp = vi->ifp; 967 struct netmap_adapter *na = NA(ifp); 968 struct netmap_kring *kring = na->rx_rings[nm_rxq->nid]; 969 struct netmap_ring *ring = kring->ring; 970 struct iq_desc *d = &nm_rxq->iq_desc[nm_rxq->iq_cidx]; 971 const void *cpl; 972 uint32_t lq; 973 u_int work = 0; 974 uint8_t opcode; 975 uint32_t fl_cidx = atomic_load_acq_32(&nm_rxq->fl_cidx); 976 u_int fl_credits = fl_cidx & 7; 977 u_int ndesc = 0; /* desc processed since last cidx update */ 978 u_int nframes = 0; /* frames processed since last netmap wakeup */ 979 980 while ((d->rsp.u.type_gen & F_RSPD_GEN) == nm_rxq->iq_gen) { 981 982 rmb(); 983 984 lq = be32toh(d->rsp.pldbuflen_qid); 985 opcode = d->rss.opcode; 986 cpl = &d->cpl[0]; 987 988 switch (G_RSPD_TYPE(d->rsp.u.type_gen)) { 989 case X_RSPD_TYPE_FLBUF: 990 991 /* fall through */ 992 993 case X_RSPD_TYPE_CPL: 994 MPASS(opcode < NUM_CPL_CMDS); 995 996 switch (opcode) { 997 case CPL_FW4_MSG: 998 case CPL_FW6_MSG: 999 cpl = unwrap_nm_fw6_msg(cpl); 1000 /* fall through */ 1001 case CPL_SGE_EGR_UPDATE: 1002 handle_nm_sge_egr_update(sc, ifp, cpl); 1003 break; 1004 case CPL_RX_PKT: 1005 ring->slot[fl_cidx].len = G_RSPD_LEN(lq) - 1006 sc->params.sge.fl_pktshift; 1007 ring->slot[fl_cidx].flags = 0; 1008 nframes++; 1009 if (!(lq & F_RSPD_NEWBUF)) { 1010 MPASS(black_hole == 2); 1011 break; 1012 } 1013 fl_credits++; 1014 if (__predict_false(++fl_cidx == nm_rxq->fl_sidx)) 1015 fl_cidx = 0; 1016 break; 1017 default: 1018 panic("%s: unexpected opcode 0x%x on nm_rxq %p", 1019 __func__, opcode, nm_rxq); 1020 } 1021 break; 1022 1023 case X_RSPD_TYPE_INTR: 1024 /* Not equipped to handle forwarded interrupts. */ 1025 panic("%s: netmap queue received interrupt for iq %u\n", 1026 __func__, lq); 1027 1028 default: 1029 panic("%s: illegal response type %d on nm_rxq %p", 1030 __func__, G_RSPD_TYPE(d->rsp.u.type_gen), nm_rxq); 1031 } 1032 1033 d++; 1034 if (__predict_false(++nm_rxq->iq_cidx == nm_rxq->iq_sidx)) { 1035 nm_rxq->iq_cidx = 0; 1036 d = &nm_rxq->iq_desc[0]; 1037 nm_rxq->iq_gen ^= F_RSPD_GEN; 1038 } 1039 1040 if (__predict_false(++nframes == rx_nframes) && !black_hole) { 1041 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx); 1042 netmap_rx_irq(ifp, nm_rxq->nid, &work); 1043 nframes = 0; 1044 } 1045 1046 if (__predict_false(++ndesc == rx_ndesc)) { 1047 if (black_hole && fl_credits >= 8) { 1048 fl_credits /= 8; 1049 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8, 1050 nm_rxq->fl_sidx); 1051 t4_write_reg(sc, sc->sge_kdoorbell_reg, 1052 nm_rxq->fl_db_val | V_PIDX(fl_credits)); 1053 fl_credits = fl_cidx & 7; 1054 } 1055 t4_write_reg(sc, sc->sge_gts_reg, 1056 V_CIDXINC(ndesc) | 1057 V_INGRESSQID(nm_rxq->iq_cntxt_id) | 1058 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 1059 ndesc = 0; 1060 } 1061 } 1062 1063 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx); 1064 if (black_hole) { 1065 fl_credits /= 8; 1066 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8, nm_rxq->fl_sidx); 1067 t4_write_reg(sc, sc->sge_kdoorbell_reg, 1068 nm_rxq->fl_db_val | V_PIDX(fl_credits)); 1069 } else if (nframes > 0) 1070 netmap_rx_irq(ifp, nm_rxq->nid, &work); 1071 1072 t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(ndesc) | 1073 V_INGRESSQID((u32)nm_rxq->iq_cntxt_id) | 1074 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx))); 1075 } 1076 #endif 1077