1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/mac_provider.h> 27 #include <sys/nxge/nxge_impl.h> 28 #include <sys/nxge/nxge_hio.h> 29 #include <npi_tx_wr64.h> 30 31 /* Software LSO required header files */ 32 #include <netinet/tcp.h> 33 #include <inet/ip_impl.h> 34 #include <inet/tcp.h> 35 36 extern uint64_t mac_pkt_hash(uint_t, mblk_t *mp, uint8_t policy, 37 boolean_t is_outbound); 38 39 static mblk_t *nxge_lso_eliminate(mblk_t *); 40 static mblk_t *nxge_do_softlso(mblk_t *mp, uint32_t mss); 41 static void nxge_lso_info_get(mblk_t *, uint32_t *, uint32_t *); 42 static void nxge_hcksum_retrieve(mblk_t *, 43 uint32_t *, uint32_t *, uint32_t *, 44 uint32_t *, uint32_t *); 45 static uint32_t nxge_csgen(uint16_t *, int); 46 47 extern uint32_t nxge_reclaim_pending; 48 extern uint32_t nxge_bcopy_thresh; 49 extern uint32_t nxge_dvma_thresh; 50 extern uint32_t nxge_dma_stream_thresh; 51 extern uint32_t nxge_tx_minfree; 52 extern uint32_t nxge_tx_intr_thres; 53 extern uint32_t nxge_tx_max_gathers; 54 extern uint32_t nxge_tx_tiny_pack; 55 extern uint32_t nxge_tx_use_bcopy; 56 extern nxge_tx_mode_t nxge_tx_scheme; 57 uint32_t nxge_lso_kick_cnt = 2; 58 59 60 void 61 nxge_tx_ring_task(void *arg) 62 { 63 p_tx_ring_t ring = (p_tx_ring_t)arg; 64 65 MUTEX_ENTER(&ring->lock); 66 (void) nxge_txdma_reclaim(ring->nxgep, ring, 0); 67 MUTEX_EXIT(&ring->lock); 68 69 if (!isLDOMguest(ring->nxgep) && !ring->tx_ring_offline) 70 mac_tx_ring_update(ring->nxgep->mach, ring->tx_ring_handle); 71 #if defined(sun4v) 72 else { 73 nxge_hio_data_t *nhd = 74 (nxge_hio_data_t *)ring->nxgep->nxge_hw_p->hio; 75 nx_vio_fp_t *vio = &nhd->hio.vio; 76 77 /* Call back vnet. */ 78 if (vio->cb.vio_net_tx_update) { 79 (*vio->cb.vio_net_tx_update)(ring->nxgep->hio_vr->vhp); 80 } 81 } 82 #endif 83 } 84 85 static void 86 nxge_tx_ring_dispatch(p_tx_ring_t ring) 87 { 88 /* 89 * Kick the ring task to reclaim some buffers. 90 */ 91 (void) ddi_taskq_dispatch(ring->taskq, 92 nxge_tx_ring_task, (void *)ring, DDI_SLEEP); 93 } 94 95 mblk_t * 96 nxge_tx_ring_send(void *arg, mblk_t *mp) 97 { 98 p_nxge_ring_handle_t nrhp = (p_nxge_ring_handle_t)arg; 99 p_nxge_t nxgep; 100 p_tx_ring_t tx_ring_p; 101 int status, channel; 102 103 ASSERT(nrhp != NULL); 104 nxgep = nrhp->nxgep; 105 channel = nxgep->pt_config.hw_config.tdc.start + nrhp->index; 106 tx_ring_p = nxgep->tx_rings->rings[channel]; 107 108 /* 109 * We may be in a transition from offlined DMA to onlined 110 * DMA. 111 */ 112 if (tx_ring_p == NULL) { 113 ASSERT(tx_ring_p != NULL); 114 freemsg(mp); 115 return ((mblk_t *)NULL); 116 } 117 118 /* 119 * Valid DMA? 120 */ 121 ASSERT(nxgep == tx_ring_p->nxgep); 122 123 /* 124 * Make sure DMA is not offlined. 125 */ 126 if (isLDOMservice(nxgep) && tx_ring_p->tx_ring_offline) { 127 ASSERT(!tx_ring_p->tx_ring_offline); 128 freemsg(mp); 129 return ((mblk_t *)NULL); 130 } 131 132 /* 133 * Transmit the packet. 134 */ 135 status = nxge_start(nxgep, tx_ring_p, mp); 136 if (status) { 137 nxge_tx_ring_dispatch(tx_ring_p); 138 return (mp); 139 } 140 141 return ((mblk_t *)NULL); 142 } 143 144 #if defined(sun4v) 145 146 /* 147 * Hashing policy for load balancing over the set of TX rings 148 * available to the driver. 149 */ 150 static uint8_t nxge_tx_hash_policy = MAC_PKT_HASH_L4; 151 152 /* 153 * nxge_m_tx() is needed for Hybrid I/O operation of the vnet in 154 * the guest domain. See CR 6778758 for long term solution. 155 * 156 * The guest domain driver will for now hash the packet 157 * to pick a DMA channel from the only group it has group 0. 158 */ 159 160 mblk_t * 161 nxge_m_tx(void *arg, mblk_t *mp) 162 { 163 p_nxge_t nxgep = (p_nxge_t)arg; 164 mblk_t *next; 165 uint64_t rindex; 166 p_tx_ring_t tx_ring_p; 167 int status; 168 169 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_m_tx")); 170 171 /* 172 * Hash to pick a ring from Group 0, the only TX group 173 * for a guest domain driver. 174 */ 175 rindex = mac_pkt_hash(DL_ETHER, mp, nxge_tx_hash_policy, B_TRUE); 176 rindex = rindex % nxgep->pt_config.tdc_grps[0].max_tdcs; 177 178 /* 179 * Get the ring handle. 180 */ 181 tx_ring_p = nxgep->tx_rings->rings[rindex]; 182 183 while (mp != NULL) { 184 next = mp->b_next; 185 mp->b_next = NULL; 186 187 status = nxge_start(nxgep, tx_ring_p, mp); 188 if (status != 0) { 189 mp->b_next = next; 190 nxge_tx_ring_dispatch(tx_ring_p); 191 return (mp); 192 } 193 194 mp = next; 195 } 196 197 NXGE_DEBUG_MSG((nxgep, TX_CTL, "<== nxge_m_tx")); 198 return ((mblk_t *)NULL); 199 } 200 201 #endif 202 203 int 204 nxge_start(p_nxge_t nxgep, p_tx_ring_t tx_ring_p, p_mblk_t mp) 205 { 206 int dma_status, status = 0; 207 p_tx_desc_t tx_desc_ring_vp; 208 npi_handle_t npi_desc_handle; 209 nxge_os_dma_handle_t tx_desc_dma_handle; 210 p_tx_desc_t tx_desc_p; 211 p_tx_msg_t tx_msg_ring; 212 p_tx_msg_t tx_msg_p; 213 tx_desc_t tx_desc, *tmp_desc_p; 214 tx_desc_t sop_tx_desc, *sop_tx_desc_p; 215 p_tx_pkt_header_t hdrp; 216 tx_pkt_hdr_all_t tmp_hdrp; 217 p_tx_pkt_hdr_all_t pkthdrp; 218 uint8_t npads = 0; 219 uint64_t dma_ioaddr; 220 uint32_t dma_flags; 221 int last_bidx; 222 uint8_t *b_rptr; 223 caddr_t kaddr; 224 uint32_t nmblks; 225 uint32_t ngathers; 226 uint32_t clen; 227 int len; 228 uint32_t pkt_len, pack_len, min_len; 229 uint32_t bcopy_thresh; 230 int i, cur_index, sop_index; 231 uint16_t tail_index; 232 boolean_t tail_wrap = B_FALSE; 233 nxge_dma_common_t desc_area; 234 nxge_os_dma_handle_t dma_handle; 235 ddi_dma_cookie_t dma_cookie; 236 npi_handle_t npi_handle; 237 p_mblk_t nmp; 238 p_mblk_t t_mp; 239 uint32_t ncookies; 240 boolean_t good_packet; 241 boolean_t mark_mode = B_FALSE; 242 p_nxge_stats_t statsp; 243 p_nxge_tx_ring_stats_t tdc_stats; 244 t_uscalar_t start_offset = 0; 245 t_uscalar_t stuff_offset = 0; 246 t_uscalar_t end_offset = 0; 247 t_uscalar_t value = 0; 248 t_uscalar_t cksum_flags = 0; 249 boolean_t cksum_on = B_FALSE; 250 uint32_t boff = 0; 251 uint64_t tot_xfer_len = 0; 252 boolean_t header_set = B_FALSE; 253 #ifdef NXGE_DEBUG 254 p_tx_desc_t tx_desc_ring_pp; 255 p_tx_desc_t tx_desc_pp; 256 tx_desc_t *save_desc_p; 257 int dump_len; 258 int sad_len; 259 uint64_t sad; 260 int xfer_len; 261 uint32_t msgsize; 262 #endif 263 p_mblk_t mp_chain = NULL; 264 boolean_t is_lso = B_FALSE; 265 boolean_t lso_again; 266 int cur_index_lso; 267 p_mblk_t nmp_lso_save; 268 uint32_t lso_ngathers; 269 boolean_t lso_tail_wrap = B_FALSE; 270 271 NXGE_DEBUG_MSG((nxgep, TX_CTL, 272 "==> nxge_start: tx dma channel %d", tx_ring_p->tdc)); 273 NXGE_DEBUG_MSG((nxgep, TX_CTL, 274 "==> nxge_start: Starting tdc %d desc pending %d", 275 tx_ring_p->tdc, tx_ring_p->descs_pending)); 276 277 statsp = nxgep->statsp; 278 279 if (!isLDOMguest(nxgep)) { 280 switch (nxgep->mac.portmode) { 281 default: 282 if (nxgep->statsp->port_stats.lb_mode == 283 nxge_lb_normal) { 284 if (!statsp->mac_stats.link_up) { 285 freemsg(mp); 286 NXGE_DEBUG_MSG((nxgep, TX_CTL, 287 "==> nxge_start: " 288 "link not up")); 289 goto nxge_start_fail1; 290 } 291 } 292 break; 293 case PORT_10G_FIBER: 294 /* 295 * For the following modes, check the link status 296 * before sending the packet out: 297 * nxge_lb_normal, 298 * nxge_lb_ext10g, 299 * nxge_lb_ext1000, 300 * nxge_lb_ext100, 301 * nxge_lb_ext10. 302 */ 303 if (nxgep->statsp->port_stats.lb_mode < 304 nxge_lb_phy10g) { 305 if (!statsp->mac_stats.link_up) { 306 freemsg(mp); 307 NXGE_DEBUG_MSG((nxgep, TX_CTL, 308 "==> nxge_start: " 309 "link not up")); 310 goto nxge_start_fail1; 311 } 312 } 313 break; 314 } 315 } 316 317 if ((!(nxgep->drv_state & STATE_HW_INITIALIZED)) || 318 (nxgep->nxge_mac_state != NXGE_MAC_STARTED)) { 319 NXGE_DEBUG_MSG((nxgep, TX_CTL, 320 "==> nxge_start: hardware not initialized or stopped")); 321 freemsg(mp); 322 goto nxge_start_fail1; 323 } 324 325 if (nxgep->soft_lso_enable) { 326 mp_chain = nxge_lso_eliminate(mp); 327 NXGE_DEBUG_MSG((nxgep, TX_CTL, 328 "==> nxge_start(0): LSO mp $%p mp_chain $%p", 329 mp, mp_chain)); 330 if (mp_chain == NULL) { 331 NXGE_ERROR_MSG((nxgep, TX_CTL, 332 "==> nxge_send(0): NULL mp_chain $%p != mp $%p", 333 mp_chain, mp)); 334 goto nxge_start_fail1; 335 } 336 if (mp_chain != mp) { 337 NXGE_DEBUG_MSG((nxgep, TX_CTL, 338 "==> nxge_send(1): IS LSO mp_chain $%p != mp $%p", 339 mp_chain, mp)); 340 is_lso = B_TRUE; 341 mp = mp_chain; 342 mp_chain = mp_chain->b_next; 343 mp->b_next = NULL; 344 } 345 } 346 347 hcksum_retrieve(mp, NULL, NULL, &start_offset, 348 &stuff_offset, &end_offset, &value, &cksum_flags); 349 if (!NXGE_IS_VLAN_PACKET(mp->b_rptr)) { 350 start_offset += sizeof (ether_header_t); 351 stuff_offset += sizeof (ether_header_t); 352 } else { 353 start_offset += sizeof (struct ether_vlan_header); 354 stuff_offset += sizeof (struct ether_vlan_header); 355 } 356 357 if (cksum_flags & HCK_PARTIALCKSUM) { 358 NXGE_DEBUG_MSG((nxgep, TX_CTL, 359 "==> nxge_start: mp $%p len %d " 360 "cksum_flags 0x%x (partial checksum) ", 361 mp, MBLKL(mp), cksum_flags)); 362 cksum_on = B_TRUE; 363 } 364 365 pkthdrp = (p_tx_pkt_hdr_all_t)&tmp_hdrp; 366 pkthdrp->reserved = 0; 367 tmp_hdrp.pkthdr.value = 0; 368 nxge_fill_tx_hdr(mp, B_FALSE, cksum_on, 369 0, 0, pkthdrp, 370 start_offset, stuff_offset); 371 372 lso_again = B_FALSE; 373 lso_ngathers = 0; 374 375 MUTEX_ENTER(&tx_ring_p->lock); 376 377 if (isLDOMservice(nxgep)) { 378 tx_ring_p->tx_ring_busy = B_TRUE; 379 if (tx_ring_p->tx_ring_offline) { 380 freemsg(mp); 381 tx_ring_p->tx_ring_busy = B_FALSE; 382 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline, 383 NXGE_TX_RING_OFFLINED); 384 MUTEX_EXIT(&tx_ring_p->lock); 385 return (status); 386 } 387 } 388 389 cur_index_lso = tx_ring_p->wr_index; 390 lso_tail_wrap = tx_ring_p->wr_index_wrap; 391 start_again: 392 ngathers = 0; 393 sop_index = tx_ring_p->wr_index; 394 #ifdef NXGE_DEBUG 395 if (tx_ring_p->descs_pending) { 396 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: " 397 "desc pending %d ", tx_ring_p->descs_pending)); 398 } 399 400 dump_len = (int)(MBLKL(mp)); 401 dump_len = (dump_len > 128) ? 128: dump_len; 402 403 NXGE_DEBUG_MSG((nxgep, TX_CTL, 404 "==> nxge_start: tdc %d: dumping ...: b_rptr $%p " 405 "(Before header reserve: ORIGINAL LEN %d)", 406 tx_ring_p->tdc, 407 mp->b_rptr, 408 dump_len)); 409 410 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: dump packets " 411 "(IP ORIGINAL b_rptr $%p): %s", mp->b_rptr, 412 nxge_dump_packet((char *)mp->b_rptr, dump_len))); 413 #endif 414 415 tdc_stats = tx_ring_p->tdc_stats; 416 mark_mode = (tx_ring_p->descs_pending && 417 (((int)tx_ring_p->tx_ring_size - (int)tx_ring_p->descs_pending) < 418 (int)nxge_tx_minfree)); 419 420 NXGE_DEBUG_MSG((nxgep, TX_CTL, 421 "TX Descriptor ring is channel %d mark mode %d", 422 tx_ring_p->tdc, mark_mode)); 423 424 if ((tx_ring_p->descs_pending + lso_ngathers) >= nxge_reclaim_pending) { 425 if (!nxge_txdma_reclaim(nxgep, tx_ring_p, 426 (nxge_tx_minfree + lso_ngathers))) { 427 NXGE_DEBUG_MSG((nxgep, TX_CTL, 428 "TX Descriptor ring is full: channel %d", 429 tx_ring_p->tdc)); 430 NXGE_DEBUG_MSG((nxgep, TX_CTL, 431 "TX Descriptor ring is full: channel %d", 432 tx_ring_p->tdc)); 433 if (is_lso) { 434 /* 435 * free the current mp and mp_chain if not FULL. 436 */ 437 tdc_stats->tx_no_desc++; 438 NXGE_DEBUG_MSG((nxgep, TX_CTL, 439 "LSO packet: TX Descriptor ring is full: " 440 "channel %d", 441 tx_ring_p->tdc)); 442 goto nxge_start_fail_lso; 443 } else { 444 (void) cas32((uint32_t *)&tx_ring_p->queueing, 445 0, 1); 446 tdc_stats->tx_no_desc++; 447 448 if (isLDOMservice(nxgep)) { 449 tx_ring_p->tx_ring_busy = B_FALSE; 450 if (tx_ring_p->tx_ring_offline) { 451 (void) atomic_swap_32( 452 &tx_ring_p->tx_ring_offline, 453 NXGE_TX_RING_OFFLINED); 454 } 455 } 456 457 MUTEX_EXIT(&tx_ring_p->lock); 458 status = 1; 459 goto nxge_start_fail1; 460 } 461 } 462 } 463 464 nmp = mp; 465 i = sop_index = tx_ring_p->wr_index; 466 nmblks = 0; 467 ngathers = 0; 468 pkt_len = 0; 469 pack_len = 0; 470 clen = 0; 471 last_bidx = -1; 472 good_packet = B_TRUE; 473 474 desc_area = tx_ring_p->tdc_desc; 475 npi_handle = desc_area.npi_handle; 476 npi_desc_handle.regh = (nxge_os_acc_handle_t) 477 DMA_COMMON_ACC_HANDLE(desc_area); 478 tx_desc_ring_vp = (p_tx_desc_t)DMA_COMMON_VPTR(desc_area); 479 tx_desc_dma_handle = (nxge_os_dma_handle_t) 480 DMA_COMMON_HANDLE(desc_area); 481 tx_msg_ring = tx_ring_p->tx_msg_ring; 482 483 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: wr_index %d i %d", 484 sop_index, i)); 485 486 #ifdef NXGE_DEBUG 487 msgsize = msgdsize(nmp); 488 NXGE_DEBUG_MSG((nxgep, TX_CTL, 489 "==> nxge_start(1): wr_index %d i %d msgdsize %d", 490 sop_index, i, msgsize)); 491 #endif 492 /* 493 * The first 16 bytes of the premapped buffer are reserved 494 * for header. No padding will be used. 495 */ 496 pkt_len = pack_len = boff = TX_PKT_HEADER_SIZE; 497 if (nxge_tx_use_bcopy && (nxgep->niu_type != N2_NIU)) { 498 bcopy_thresh = (nxge_bcopy_thresh - TX_PKT_HEADER_SIZE); 499 } else { 500 bcopy_thresh = (TX_BCOPY_SIZE - TX_PKT_HEADER_SIZE); 501 } 502 while (nmp) { 503 good_packet = B_TRUE; 504 b_rptr = nmp->b_rptr; 505 len = MBLKL(nmp); 506 if (len <= 0) { 507 nmp = nmp->b_cont; 508 continue; 509 } 510 nmblks++; 511 512 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(1): nmblks %d " 513 "len %d pkt_len %d pack_len %d", 514 nmblks, len, pkt_len, pack_len)); 515 /* 516 * Hardware limits the transfer length to 4K for NIU and 517 * 4076 (TX_MAX_TRANSFER_LENGTH) for Neptune. But we just 518 * use TX_MAX_TRANSFER_LENGTH as the limit for both. 519 * If len is longer than the limit, then we break nmp into 520 * two chunks: Make the first chunk equal to the limit and 521 * the second chunk for the remaining data. If the second 522 * chunk is still larger than the limit, then it will be 523 * broken into two in the next pass. 524 */ 525 if (len > TX_MAX_TRANSFER_LENGTH - TX_PKT_HEADER_SIZE) { 526 if ((t_mp = dupb(nmp)) != NULL) { 527 nmp->b_wptr = nmp->b_rptr + 528 (TX_MAX_TRANSFER_LENGTH 529 - TX_PKT_HEADER_SIZE); 530 t_mp->b_rptr = nmp->b_wptr; 531 t_mp->b_cont = nmp->b_cont; 532 nmp->b_cont = t_mp; 533 len = MBLKL(nmp); 534 } else { 535 if (is_lso) { 536 NXGE_DEBUG_MSG((nxgep, TX_CTL, 537 "LSO packet: dupb failed: " 538 "channel %d", 539 tx_ring_p->tdc)); 540 mp = nmp; 541 goto nxge_start_fail_lso; 542 } else { 543 good_packet = B_FALSE; 544 goto nxge_start_fail2; 545 } 546 } 547 } 548 tx_desc.value = 0; 549 tx_desc_p = &tx_desc_ring_vp[i]; 550 #ifdef NXGE_DEBUG 551 tx_desc_pp = &tx_desc_ring_pp[i]; 552 #endif 553 tx_msg_p = &tx_msg_ring[i]; 554 #if defined(__i386) 555 npi_desc_handle.regp = (uint32_t)tx_desc_p; 556 #else 557 npi_desc_handle.regp = (uint64_t)tx_desc_p; 558 #endif 559 if (!header_set && 560 ((!nxge_tx_use_bcopy && (len > TX_BCOPY_SIZE)) || 561 (len >= bcopy_thresh))) { 562 header_set = B_TRUE; 563 bcopy_thresh += TX_PKT_HEADER_SIZE; 564 boff = 0; 565 pack_len = 0; 566 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma); 567 hdrp = (p_tx_pkt_header_t)kaddr; 568 clen = pkt_len; 569 dma_handle = tx_msg_p->buf_dma_handle; 570 dma_ioaddr = DMA_COMMON_IOADDR(tx_msg_p->buf_dma); 571 (void) ddi_dma_sync(dma_handle, 572 i * nxge_bcopy_thresh, nxge_bcopy_thresh, 573 DDI_DMA_SYNC_FORDEV); 574 575 tx_msg_p->flags.dma_type = USE_BCOPY; 576 goto nxge_start_control_header_only; 577 } 578 579 pkt_len += len; 580 pack_len += len; 581 582 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(3): " 583 "desc entry %d " 584 "DESC IOADDR $%p " 585 "desc_vp $%p tx_desc_p $%p " 586 "desc_pp $%p tx_desc_pp $%p " 587 "len %d pkt_len %d pack_len %d", 588 i, 589 DMA_COMMON_IOADDR(desc_area), 590 tx_desc_ring_vp, tx_desc_p, 591 tx_desc_ring_pp, tx_desc_pp, 592 len, pkt_len, pack_len)); 593 594 if (len < bcopy_thresh) { 595 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(4): " 596 "USE BCOPY: ")); 597 if (nxge_tx_tiny_pack) { 598 uint32_t blst = 599 TXDMA_DESC_NEXT_INDEX(i, -1, 600 tx_ring_p->tx_wrap_mask); 601 NXGE_DEBUG_MSG((nxgep, TX_CTL, 602 "==> nxge_start(5): pack")); 603 if ((pack_len <= bcopy_thresh) && 604 (last_bidx == blst)) { 605 NXGE_DEBUG_MSG((nxgep, TX_CTL, 606 "==> nxge_start: pack(6) " 607 "(pkt_len %d pack_len %d)", 608 pkt_len, pack_len)); 609 i = blst; 610 tx_desc_p = &tx_desc_ring_vp[i]; 611 #ifdef NXGE_DEBUG 612 tx_desc_pp = &tx_desc_ring_pp[i]; 613 #endif 614 tx_msg_p = &tx_msg_ring[i]; 615 boff = pack_len - len; 616 ngathers--; 617 } else if (pack_len > bcopy_thresh && 618 header_set) { 619 pack_len = len; 620 boff = 0; 621 bcopy_thresh = nxge_bcopy_thresh; 622 NXGE_DEBUG_MSG((nxgep, TX_CTL, 623 "==> nxge_start(7): > max NEW " 624 "bcopy thresh %d " 625 "pkt_len %d pack_len %d(next)", 626 bcopy_thresh, 627 pkt_len, pack_len)); 628 } 629 last_bidx = i; 630 } 631 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma); 632 if ((boff == TX_PKT_HEADER_SIZE) && (nmblks == 1)) { 633 hdrp = (p_tx_pkt_header_t)kaddr; 634 header_set = B_TRUE; 635 NXGE_DEBUG_MSG((nxgep, TX_CTL, 636 "==> nxge_start(7_x2): " 637 "pkt_len %d pack_len %d (new hdrp $%p)", 638 pkt_len, pack_len, hdrp)); 639 } 640 tx_msg_p->flags.dma_type = USE_BCOPY; 641 kaddr += boff; 642 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(8): " 643 "USE BCOPY: before bcopy " 644 "DESC IOADDR $%p entry %d " 645 "bcopy packets %d " 646 "bcopy kaddr $%p " 647 "bcopy ioaddr (SAD) $%p " 648 "bcopy clen %d " 649 "bcopy boff %d", 650 DMA_COMMON_IOADDR(desc_area), i, 651 tdc_stats->tx_hdr_pkts, 652 kaddr, 653 dma_ioaddr, 654 clen, 655 boff)); 656 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: " 657 "1USE BCOPY: ")); 658 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: " 659 "2USE BCOPY: ")); 660 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: " 661 "last USE BCOPY: copy from b_rptr $%p " 662 "to KADDR $%p (len %d offset %d", 663 b_rptr, kaddr, len, boff)); 664 665 bcopy(b_rptr, kaddr, len); 666 667 #ifdef NXGE_DEBUG 668 dump_len = (len > 128) ? 128: len; 669 NXGE_DEBUG_MSG((nxgep, TX_CTL, 670 "==> nxge_start: dump packets " 671 "(After BCOPY len %d)" 672 "(b_rptr $%p): %s", len, nmp->b_rptr, 673 nxge_dump_packet((char *)nmp->b_rptr, 674 dump_len))); 675 #endif 676 677 dma_handle = tx_msg_p->buf_dma_handle; 678 dma_ioaddr = DMA_COMMON_IOADDR(tx_msg_p->buf_dma); 679 (void) ddi_dma_sync(dma_handle, 680 i * nxge_bcopy_thresh, nxge_bcopy_thresh, 681 DDI_DMA_SYNC_FORDEV); 682 clen = len + boff; 683 tdc_stats->tx_hdr_pkts++; 684 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(9): " 685 "USE BCOPY: " 686 "DESC IOADDR $%p entry %d " 687 "bcopy packets %d " 688 "bcopy kaddr $%p " 689 "bcopy ioaddr (SAD) $%p " 690 "bcopy clen %d " 691 "bcopy boff %d", 692 DMA_COMMON_IOADDR(desc_area), 693 i, 694 tdc_stats->tx_hdr_pkts, 695 kaddr, 696 dma_ioaddr, 697 clen, 698 boff)); 699 } else { 700 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(12): " 701 "USE DVMA: len %d", len)); 702 tx_msg_p->flags.dma_type = USE_DMA; 703 dma_flags = DDI_DMA_WRITE; 704 if (len < nxge_dma_stream_thresh) { 705 dma_flags |= DDI_DMA_CONSISTENT; 706 } else { 707 dma_flags |= DDI_DMA_STREAMING; 708 } 709 710 dma_handle = tx_msg_p->dma_handle; 711 dma_status = ddi_dma_addr_bind_handle(dma_handle, NULL, 712 (caddr_t)b_rptr, len, dma_flags, 713 DDI_DMA_DONTWAIT, NULL, 714 &dma_cookie, &ncookies); 715 if (dma_status == DDI_DMA_MAPPED) { 716 dma_ioaddr = dma_cookie.dmac_laddress; 717 len = (int)dma_cookie.dmac_size; 718 clen = (uint32_t)dma_cookie.dmac_size; 719 NXGE_DEBUG_MSG((nxgep, TX_CTL, 720 "==> nxge_start(12_1): " 721 "USE DVMA: len %d clen %d " 722 "ngathers %d", 723 len, clen, 724 ngathers)); 725 #if defined(__i386) 726 npi_desc_handle.regp = (uint32_t)tx_desc_p; 727 #else 728 npi_desc_handle.regp = (uint64_t)tx_desc_p; 729 #endif 730 while (ncookies > 1) { 731 ngathers++; 732 /* 733 * this is the fix for multiple 734 * cookies, which are basically 735 * a descriptor entry, we don't set 736 * SOP bit as well as related fields 737 */ 738 739 (void) npi_txdma_desc_gather_set( 740 npi_desc_handle, 741 &tx_desc, 742 (ngathers -1), 743 mark_mode, 744 ngathers, 745 dma_ioaddr, 746 clen); 747 748 tx_msg_p->tx_msg_size = clen; 749 NXGE_DEBUG_MSG((nxgep, TX_CTL, 750 "==> nxge_start: DMA " 751 "ncookie %d " 752 "ngathers %d " 753 "dma_ioaddr $%p len %d" 754 "desc $%p descp $%p (%d)", 755 ncookies, 756 ngathers, 757 dma_ioaddr, clen, 758 *tx_desc_p, tx_desc_p, i)); 759 760 ddi_dma_nextcookie(dma_handle, 761 &dma_cookie); 762 dma_ioaddr = 763 dma_cookie.dmac_laddress; 764 765 len = (int)dma_cookie.dmac_size; 766 clen = (uint32_t)dma_cookie.dmac_size; 767 NXGE_DEBUG_MSG((nxgep, TX_CTL, 768 "==> nxge_start(12_2): " 769 "USE DVMA: len %d clen %d ", 770 len, clen)); 771 772 i = TXDMA_DESC_NEXT_INDEX(i, 1, 773 tx_ring_p->tx_wrap_mask); 774 tx_desc_p = &tx_desc_ring_vp[i]; 775 776 #if defined(__i386) 777 npi_desc_handle.regp = 778 (uint32_t)tx_desc_p; 779 #else 780 npi_desc_handle.regp = 781 (uint64_t)tx_desc_p; 782 #endif 783 tx_msg_p = &tx_msg_ring[i]; 784 tx_msg_p->flags.dma_type = USE_NONE; 785 tx_desc.value = 0; 786 787 ncookies--; 788 } 789 tdc_stats->tx_ddi_pkts++; 790 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start:" 791 "DMA: ddi packets %d", 792 tdc_stats->tx_ddi_pkts)); 793 } else { 794 NXGE_ERROR_MSG((nxgep, NXGE_ERR_CTL, 795 "dma mapping failed for %d " 796 "bytes addr $%p flags %x (%d)", 797 len, b_rptr, status, status)); 798 good_packet = B_FALSE; 799 tdc_stats->tx_dma_bind_fail++; 800 tx_msg_p->flags.dma_type = USE_NONE; 801 if (is_lso) { 802 mp = nmp; 803 goto nxge_start_fail_lso; 804 } else { 805 status = 1; 806 goto nxge_start_fail2; 807 } 808 } 809 } /* ddi dvma */ 810 811 if (is_lso) { 812 nmp_lso_save = nmp; 813 } 814 nmp = nmp->b_cont; 815 nxge_start_control_header_only: 816 #if defined(__i386) 817 npi_desc_handle.regp = (uint32_t)tx_desc_p; 818 #else 819 npi_desc_handle.regp = (uint64_t)tx_desc_p; 820 #endif 821 ngathers++; 822 823 if (ngathers == 1) { 824 #ifdef NXGE_DEBUG 825 save_desc_p = &sop_tx_desc; 826 #endif 827 sop_tx_desc_p = &sop_tx_desc; 828 sop_tx_desc_p->value = 0; 829 sop_tx_desc_p->bits.hdw.tr_len = clen; 830 sop_tx_desc_p->bits.hdw.sad = dma_ioaddr >> 32; 831 sop_tx_desc_p->bits.ldw.sad = dma_ioaddr & 0xffffffff; 832 } else { 833 #ifdef NXGE_DEBUG 834 save_desc_p = &tx_desc; 835 #endif 836 tmp_desc_p = &tx_desc; 837 tmp_desc_p->value = 0; 838 tmp_desc_p->bits.hdw.tr_len = clen; 839 tmp_desc_p->bits.hdw.sad = dma_ioaddr >> 32; 840 tmp_desc_p->bits.ldw.sad = dma_ioaddr & 0xffffffff; 841 842 tx_desc_p->value = tmp_desc_p->value; 843 } 844 845 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(13): " 846 "Desc_entry %d ngathers %d " 847 "desc_vp $%p tx_desc_p $%p " 848 "len %d clen %d pkt_len %d pack_len %d nmblks %d " 849 "dma_ioaddr (SAD) $%p mark %d", 850 i, ngathers, 851 tx_desc_ring_vp, tx_desc_p, 852 len, clen, pkt_len, pack_len, nmblks, 853 dma_ioaddr, mark_mode)); 854 855 #ifdef NXGE_DEBUG 856 npi_desc_handle.nxgep = nxgep; 857 npi_desc_handle.function.function = nxgep->function_num; 858 npi_desc_handle.function.instance = nxgep->instance; 859 sad = (save_desc_p->value & TX_PKT_DESC_SAD_MASK); 860 xfer_len = ((save_desc_p->value & TX_PKT_DESC_TR_LEN_MASK) >> 861 TX_PKT_DESC_TR_LEN_SHIFT); 862 863 864 NXGE_DEBUG_MSG((nxgep, TX_CTL, "\n\t: value 0x%llx\n" 865 "\t\tsad $%p\ttr_len %d len %d\tnptrs %d\t" 866 "mark %d sop %d\n", 867 save_desc_p->value, 868 sad, 869 save_desc_p->bits.hdw.tr_len, 870 xfer_len, 871 save_desc_p->bits.hdw.num_ptr, 872 save_desc_p->bits.hdw.mark, 873 save_desc_p->bits.hdw.sop)); 874 875 npi_txdma_dump_desc_one(npi_desc_handle, NULL, i); 876 #endif 877 878 tx_msg_p->tx_msg_size = clen; 879 i = TXDMA_DESC_NEXT_INDEX(i, 1, tx_ring_p->tx_wrap_mask); 880 if (ngathers > nxge_tx_max_gathers) { 881 good_packet = B_FALSE; 882 hcksum_retrieve(mp, NULL, NULL, &start_offset, 883 &stuff_offset, &end_offset, &value, 884 &cksum_flags); 885 886 NXGE_DEBUG_MSG((NULL, TX_CTL, 887 "==> nxge_start(14): pull msg - " 888 "len %d pkt_len %d ngathers %d", 889 len, pkt_len, ngathers)); 890 891 /* 892 * Just give up on this packet. 893 */ 894 if (is_lso) { 895 mp = nmp_lso_save; 896 goto nxge_start_fail_lso; 897 } 898 status = 0; 899 goto nxge_start_fail2; 900 } 901 } /* while (nmp) */ 902 903 tx_msg_p->tx_message = mp; 904 tx_desc_p = &tx_desc_ring_vp[sop_index]; 905 #if defined(__i386) 906 npi_desc_handle.regp = (uint32_t)tx_desc_p; 907 #else 908 npi_desc_handle.regp = (uint64_t)tx_desc_p; 909 #endif 910 911 pkthdrp = (p_tx_pkt_hdr_all_t)hdrp; 912 pkthdrp->reserved = 0; 913 hdrp->value = 0; 914 bcopy(&tmp_hdrp, hdrp, sizeof (tx_pkt_header_t)); 915 916 if (pkt_len > NXGE_MTU_DEFAULT_MAX) { 917 tdc_stats->tx_jumbo_pkts++; 918 } 919 920 min_len = (ETHERMIN + TX_PKT_HEADER_SIZE + (npads * 2)); 921 if (pkt_len < min_len) { 922 /* Assume we use bcopy to premapped buffers */ 923 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma); 924 NXGE_DEBUG_MSG((NULL, TX_CTL, 925 "==> nxge_start(14-1): < (msg_min + 16)" 926 "len %d pkt_len %d min_len %d bzero %d ngathers %d", 927 len, pkt_len, min_len, (min_len - pkt_len), ngathers)); 928 bzero((kaddr + pkt_len), (min_len - pkt_len)); 929 pkt_len = tx_msg_p->tx_msg_size = min_len; 930 931 sop_tx_desc_p->bits.hdw.tr_len = min_len; 932 933 NXGE_MEM_PIO_WRITE64(npi_desc_handle, sop_tx_desc_p->value); 934 tx_desc_p->value = sop_tx_desc_p->value; 935 936 NXGE_DEBUG_MSG((NULL, TX_CTL, 937 "==> nxge_start(14-2): < msg_min - " 938 "len %d pkt_len %d min_len %d ngathers %d", 939 len, pkt_len, min_len, ngathers)); 940 } 941 942 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: cksum_flags 0x%x ", 943 cksum_flags)); 944 { 945 uint64_t tmp_len; 946 947 /* pkt_len already includes 16 + paddings!! */ 948 /* Update the control header length */ 949 tot_xfer_len = (pkt_len - TX_PKT_HEADER_SIZE); 950 tmp_len = hdrp->value | 951 (tot_xfer_len << TX_PKT_HEADER_TOT_XFER_LEN_SHIFT); 952 953 NXGE_DEBUG_MSG((nxgep, TX_CTL, 954 "==> nxge_start(15_x1): setting SOP " 955 "tot_xfer_len 0x%llx (%d) pkt_len %d tmp_len " 956 "0x%llx hdrp->value 0x%llx", 957 tot_xfer_len, tot_xfer_len, pkt_len, 958 tmp_len, hdrp->value)); 959 #if defined(_BIG_ENDIAN) 960 hdrp->value = ddi_swap64(tmp_len); 961 #else 962 hdrp->value = tmp_len; 963 #endif 964 NXGE_DEBUG_MSG((nxgep, 965 TX_CTL, "==> nxge_start(15_x2): setting SOP " 966 "after SWAP: tot_xfer_len 0x%llx pkt_len %d " 967 "tmp_len 0x%llx hdrp->value 0x%llx", 968 tot_xfer_len, pkt_len, 969 tmp_len, hdrp->value)); 970 } 971 972 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(15): setting SOP " 973 "wr_index %d " 974 "tot_xfer_len (%d) pkt_len %d npads %d", 975 sop_index, 976 tot_xfer_len, pkt_len, 977 npads)); 978 979 sop_tx_desc_p->bits.hdw.sop = 1; 980 sop_tx_desc_p->bits.hdw.mark = mark_mode; 981 sop_tx_desc_p->bits.hdw.num_ptr = ngathers; 982 983 NXGE_MEM_PIO_WRITE64(npi_desc_handle, sop_tx_desc_p->value); 984 985 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(16): set SOP done")); 986 987 #ifdef NXGE_DEBUG 988 npi_desc_handle.nxgep = nxgep; 989 npi_desc_handle.function.function = nxgep->function_num; 990 npi_desc_handle.function.instance = nxgep->instance; 991 992 NXGE_DEBUG_MSG((nxgep, TX_CTL, "\n\t: value 0x%llx\n" 993 "\t\tsad $%p\ttr_len %d len %d\tnptrs %d\tmark %d sop %d\n", 994 save_desc_p->value, 995 sad, 996 save_desc_p->bits.hdw.tr_len, 997 xfer_len, 998 save_desc_p->bits.hdw.num_ptr, 999 save_desc_p->bits.hdw.mark, 1000 save_desc_p->bits.hdw.sop)); 1001 (void) npi_txdma_dump_desc_one(npi_desc_handle, NULL, sop_index); 1002 1003 dump_len = (pkt_len > 128) ? 128: pkt_len; 1004 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1005 "==> nxge_start: dump packets(17) (after sop set, len " 1006 " (len/dump_len/pkt_len/tot_xfer_len) %d/%d/%d/%d):\n" 1007 "ptr $%p: %s", len, dump_len, pkt_len, tot_xfer_len, 1008 (char *)hdrp, 1009 nxge_dump_packet((char *)hdrp, dump_len))); 1010 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1011 "==> nxge_start(18): TX desc sync: sop_index %d", 1012 sop_index)); 1013 #endif 1014 1015 if ((ngathers == 1) || tx_ring_p->wr_index < i) { 1016 (void) ddi_dma_sync(tx_desc_dma_handle, 1017 sop_index * sizeof (tx_desc_t), 1018 ngathers * sizeof (tx_desc_t), 1019 DDI_DMA_SYNC_FORDEV); 1020 1021 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(19): sync 1 " 1022 "cs_off = 0x%02X cs_s_off = 0x%02X " 1023 "pkt_len %d ngathers %d sop_index %d\n", 1024 stuff_offset, start_offset, 1025 pkt_len, ngathers, sop_index)); 1026 } else { /* more than one descriptor and wrap around */ 1027 uint32_t nsdescs = tx_ring_p->tx_ring_size - sop_index; 1028 (void) ddi_dma_sync(tx_desc_dma_handle, 1029 sop_index * sizeof (tx_desc_t), 1030 nsdescs * sizeof (tx_desc_t), 1031 DDI_DMA_SYNC_FORDEV); 1032 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(20): sync 1 " 1033 "cs_off = 0x%02X cs_s_off = 0x%02X " 1034 "pkt_len %d ngathers %d sop_index %d\n", 1035 stuff_offset, start_offset, 1036 pkt_len, ngathers, sop_index)); 1037 1038 (void) ddi_dma_sync(tx_desc_dma_handle, 1039 0, 1040 (ngathers - nsdescs) * sizeof (tx_desc_t), 1041 DDI_DMA_SYNC_FORDEV); 1042 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(21): sync 2 " 1043 "cs_off = 0x%02X cs_s_off = 0x%02X " 1044 "pkt_len %d ngathers %d sop_index %d\n", 1045 stuff_offset, start_offset, 1046 pkt_len, ngathers, sop_index)); 1047 } 1048 1049 tail_index = tx_ring_p->wr_index; 1050 tail_wrap = tx_ring_p->wr_index_wrap; 1051 1052 tx_ring_p->wr_index = i; 1053 if (tx_ring_p->wr_index <= tail_index) { 1054 tx_ring_p->wr_index_wrap = ((tail_wrap == B_TRUE) ? 1055 B_FALSE : B_TRUE); 1056 } 1057 1058 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: TX kick: " 1059 "channel %d wr_index %d wrap %d ngathers %d desc_pend %d", 1060 tx_ring_p->tdc, 1061 tx_ring_p->wr_index, 1062 tx_ring_p->wr_index_wrap, 1063 ngathers, 1064 tx_ring_p->descs_pending)); 1065 1066 if (is_lso) { 1067 lso_ngathers += ngathers; 1068 if (mp_chain != NULL) { 1069 mp = mp_chain; 1070 mp_chain = mp_chain->b_next; 1071 mp->b_next = NULL; 1072 if (nxge_lso_kick_cnt == lso_ngathers) { 1073 tx_ring_p->descs_pending += lso_ngathers; 1074 { 1075 tx_ring_kick_t kick; 1076 1077 kick.value = 0; 1078 kick.bits.ldw.wrap = 1079 tx_ring_p->wr_index_wrap; 1080 kick.bits.ldw.tail = 1081 (uint16_t)tx_ring_p->wr_index; 1082 1083 /* Kick the Transmit kick register */ 1084 TXDMA_REG_WRITE64( 1085 NXGE_DEV_NPI_HANDLE(nxgep), 1086 TX_RING_KICK_REG, 1087 (uint8_t)tx_ring_p->tdc, 1088 kick.value); 1089 tdc_stats->tx_starts++; 1090 1091 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1092 "==> nxge_start: more LSO: " 1093 "LSO_CNT %d", 1094 lso_ngathers)); 1095 } 1096 lso_ngathers = 0; 1097 ngathers = 0; 1098 cur_index_lso = sop_index = tx_ring_p->wr_index; 1099 lso_tail_wrap = tx_ring_p->wr_index_wrap; 1100 } 1101 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1102 "==> nxge_start: lso again: " 1103 "lso_gathers %d ngathers %d cur_index_lso %d " 1104 "wr_index %d sop_index %d", 1105 lso_ngathers, ngathers, cur_index_lso, 1106 tx_ring_p->wr_index, sop_index)); 1107 1108 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1109 "==> nxge_start: next : count %d", 1110 lso_ngathers)); 1111 lso_again = B_TRUE; 1112 goto start_again; 1113 } 1114 ngathers = lso_ngathers; 1115 } 1116 1117 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: TX KICKING: ")); 1118 1119 { 1120 tx_ring_kick_t kick; 1121 1122 kick.value = 0; 1123 kick.bits.ldw.wrap = tx_ring_p->wr_index_wrap; 1124 kick.bits.ldw.tail = (uint16_t)tx_ring_p->wr_index; 1125 1126 /* Kick start the Transmit kick register */ 1127 TXDMA_REG_WRITE64(NXGE_DEV_NPI_HANDLE(nxgep), 1128 TX_RING_KICK_REG, 1129 (uint8_t)tx_ring_p->tdc, 1130 kick.value); 1131 } 1132 1133 tx_ring_p->descs_pending += ngathers; 1134 tdc_stats->tx_starts++; 1135 1136 if (isLDOMservice(nxgep)) { 1137 tx_ring_p->tx_ring_busy = B_FALSE; 1138 if (tx_ring_p->tx_ring_offline) { 1139 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline, 1140 NXGE_TX_RING_OFFLINED); 1141 } 1142 } 1143 1144 MUTEX_EXIT(&tx_ring_p->lock); 1145 1146 NXGE_DEBUG_MSG((nxgep, TX_CTL, "<== nxge_start")); 1147 return (status); 1148 1149 nxge_start_fail_lso: 1150 status = 0; 1151 good_packet = B_FALSE; 1152 if (mp != NULL) 1153 freemsg(mp); 1154 if (mp_chain != NULL) 1155 freemsgchain(mp_chain); 1156 1157 if (!lso_again && !ngathers) { 1158 if (isLDOMservice(nxgep)) { 1159 tx_ring_p->tx_ring_busy = B_FALSE; 1160 if (tx_ring_p->tx_ring_offline) { 1161 (void) atomic_swap_32( 1162 &tx_ring_p->tx_ring_offline, 1163 NXGE_TX_RING_OFFLINED); 1164 } 1165 } 1166 1167 MUTEX_EXIT(&tx_ring_p->lock); 1168 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1169 "==> nxge_start: lso exit (nothing changed)")); 1170 goto nxge_start_fail1; 1171 } 1172 1173 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1174 "==> nxge_start (channel %d): before lso " 1175 "lso_gathers %d ngathers %d cur_index_lso %d " 1176 "wr_index %d sop_index %d lso_again %d", 1177 tx_ring_p->tdc, 1178 lso_ngathers, ngathers, cur_index_lso, 1179 tx_ring_p->wr_index, sop_index, lso_again)); 1180 1181 if (lso_again) { 1182 lso_ngathers += ngathers; 1183 ngathers = lso_ngathers; 1184 sop_index = cur_index_lso; 1185 tx_ring_p->wr_index = sop_index; 1186 tx_ring_p->wr_index_wrap = lso_tail_wrap; 1187 } 1188 1189 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1190 "==> nxge_start (channel %d): after lso " 1191 "lso_gathers %d ngathers %d cur_index_lso %d " 1192 "wr_index %d sop_index %d lso_again %d", 1193 tx_ring_p->tdc, 1194 lso_ngathers, ngathers, cur_index_lso, 1195 tx_ring_p->wr_index, sop_index, lso_again)); 1196 1197 nxge_start_fail2: 1198 if (good_packet == B_FALSE) { 1199 cur_index = sop_index; 1200 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: clean up")); 1201 for (i = 0; i < ngathers; i++) { 1202 tx_desc_p = &tx_desc_ring_vp[cur_index]; 1203 #if defined(__i386) 1204 npi_handle.regp = (uint32_t)tx_desc_p; 1205 #else 1206 npi_handle.regp = (uint64_t)tx_desc_p; 1207 #endif 1208 tx_msg_p = &tx_msg_ring[cur_index]; 1209 (void) npi_txdma_desc_set_zero(npi_handle, 1); 1210 if (tx_msg_p->flags.dma_type == USE_DVMA) { 1211 NXGE_DEBUG_MSG((nxgep, TX_CTL, 1212 "tx_desc_p = %X index = %d", 1213 tx_desc_p, tx_ring_p->rd_index)); 1214 (void) dvma_unload(tx_msg_p->dvma_handle, 1215 0, -1); 1216 tx_msg_p->dvma_handle = NULL; 1217 if (tx_ring_p->dvma_wr_index == 1218 tx_ring_p->dvma_wrap_mask) 1219 tx_ring_p->dvma_wr_index = 0; 1220 else 1221 tx_ring_p->dvma_wr_index++; 1222 tx_ring_p->dvma_pending--; 1223 } else if (tx_msg_p->flags.dma_type == USE_DMA) { 1224 if (ddi_dma_unbind_handle( 1225 tx_msg_p->dma_handle)) { 1226 cmn_err(CE_WARN, "!nxge_start: " 1227 "ddi_dma_unbind_handle failed"); 1228 } 1229 } 1230 tx_msg_p->flags.dma_type = USE_NONE; 1231 cur_index = TXDMA_DESC_NEXT_INDEX(cur_index, 1, 1232 tx_ring_p->tx_wrap_mask); 1233 1234 } 1235 } 1236 1237 if (isLDOMservice(nxgep)) { 1238 tx_ring_p->tx_ring_busy = B_FALSE; 1239 if (tx_ring_p->tx_ring_offline) { 1240 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline, 1241 NXGE_TX_RING_OFFLINED); 1242 } 1243 } 1244 1245 MUTEX_EXIT(&tx_ring_p->lock); 1246 1247 nxge_start_fail1: 1248 /* Add FMA to check the access handle nxge_hregh */ 1249 1250 NXGE_DEBUG_MSG((nxgep, TX_CTL, "<== nxge_start")); 1251 return (status); 1252 } 1253 1254 /* Software LSO starts here */ 1255 static void 1256 nxge_hcksum_retrieve(mblk_t *mp, 1257 uint32_t *start, uint32_t *stuff, uint32_t *end, 1258 uint32_t *value, uint32_t *flags) 1259 { 1260 if (mp->b_datap->db_type == M_DATA) { 1261 if (flags != NULL) { 1262 *flags = DB_CKSUMFLAGS(mp) & (HCK_IPV4_HDRCKSUM | 1263 HCK_PARTIALCKSUM | HCK_FULLCKSUM | 1264 HCK_FULLCKSUM_OK); 1265 if ((*flags & (HCK_PARTIALCKSUM | 1266 HCK_FULLCKSUM)) != 0) { 1267 if (value != NULL) 1268 *value = (uint32_t)DB_CKSUM16(mp); 1269 if ((*flags & HCK_PARTIALCKSUM) != 0) { 1270 if (start != NULL) 1271 *start = 1272 (uint32_t)DB_CKSUMSTART(mp); 1273 if (stuff != NULL) 1274 *stuff = 1275 (uint32_t)DB_CKSUMSTUFF(mp); 1276 if (end != NULL) 1277 *end = 1278 (uint32_t)DB_CKSUMEND(mp); 1279 } 1280 } 1281 } 1282 } 1283 } 1284 1285 static void 1286 nxge_lso_info_get(mblk_t *mp, uint32_t *mss, uint32_t *flags) 1287 { 1288 ASSERT(DB_TYPE(mp) == M_DATA); 1289 1290 *mss = 0; 1291 if (flags != NULL) { 1292 *flags = DB_CKSUMFLAGS(mp) & HW_LSO; 1293 if ((*flags != 0) && (mss != NULL)) { 1294 *mss = (uint32_t)DB_LSOMSS(mp); 1295 } 1296 NXGE_DEBUG_MSG((NULL, TX_CTL, 1297 "==> nxge_lso_info_get(flag !=NULL): mss %d *flags 0x%x", 1298 *mss, *flags)); 1299 } 1300 1301 NXGE_DEBUG_MSG((NULL, TX_CTL, 1302 "<== nxge_lso_info_get: mss %d", *mss)); 1303 } 1304 1305 /* 1306 * Do Soft LSO on the oversized packet. 1307 * 1308 * 1. Create a chain of message for headers. 1309 * 2. Fill up header messages with proper information. 1310 * 3. Copy Eithernet, IP, and TCP headers from the original message to 1311 * each new message with necessary adjustments. 1312 * * Unchange the ethernet header for DIX frames. (by default) 1313 * * IP Total Length field is updated to MSS or less(only for the last one). 1314 * * IP Identification value is incremented by one for each packet. 1315 * * TCP sequence Number is recalculated according to the payload length. 1316 * * Set FIN and/or PSH flags for the *last* packet if applied. 1317 * * TCP partial Checksum 1318 * 4. Update LSO information in the first message header. 1319 * 5. Release the original message header. 1320 */ 1321 static mblk_t * 1322 nxge_do_softlso(mblk_t *mp, uint32_t mss) 1323 { 1324 uint32_t hckflags; 1325 int pktlen; 1326 int hdrlen; 1327 int segnum; 1328 int i; 1329 struct ether_vlan_header *evh; 1330 int ehlen, iphlen, tcphlen; 1331 struct ip *oiph, *niph; 1332 struct tcphdr *otcph, *ntcph; 1333 int available, len, left; 1334 uint16_t ip_id; 1335 uint32_t tcp_seq; 1336 #ifdef __sparc 1337 uint32_t tcp_seq_tmp; 1338 #endif 1339 mblk_t *datamp; 1340 uchar_t *rptr; 1341 mblk_t *nmp; 1342 mblk_t *cmp; 1343 mblk_t *mp_chain; 1344 boolean_t do_cleanup = B_FALSE; 1345 t_uscalar_t start_offset = 0; 1346 t_uscalar_t stuff_offset = 0; 1347 t_uscalar_t value = 0; 1348 uint16_t l4_len; 1349 ipaddr_t src, dst; 1350 uint32_t cksum, sum, l4cksum; 1351 1352 NXGE_DEBUG_MSG((NULL, TX_CTL, 1353 "==> nxge_do_softlso")); 1354 /* 1355 * check the length of LSO packet payload and calculate the number of 1356 * segments to be generated. 1357 */ 1358 pktlen = msgsize(mp); 1359 evh = (struct ether_vlan_header *)mp->b_rptr; 1360 1361 /* VLAN? */ 1362 if (evh->ether_tpid == htons(ETHERTYPE_VLAN)) 1363 ehlen = sizeof (struct ether_vlan_header); 1364 else 1365 ehlen = sizeof (struct ether_header); 1366 oiph = (struct ip *)(mp->b_rptr + ehlen); 1367 iphlen = oiph->ip_hl * 4; 1368 otcph = (struct tcphdr *)(mp->b_rptr + ehlen + iphlen); 1369 tcphlen = otcph->th_off * 4; 1370 1371 l4_len = pktlen - ehlen - iphlen; 1372 1373 NXGE_DEBUG_MSG((NULL, TX_CTL, 1374 "==> nxge_do_softlso: mss %d oiph $%p " 1375 "original ip_sum oiph->ip_sum 0x%x " 1376 "original tcp_sum otcph->th_sum 0x%x " 1377 "oiph->ip_len %d pktlen %d ehlen %d " 1378 "l4_len %d (0x%x) ip_len - iphlen %d ", 1379 mss, 1380 oiph, 1381 oiph->ip_sum, 1382 otcph->th_sum, 1383 ntohs(oiph->ip_len), pktlen, 1384 ehlen, 1385 l4_len, 1386 l4_len, 1387 ntohs(oiph->ip_len) - iphlen)); 1388 1389 /* IPv4 + TCP */ 1390 if (!(oiph->ip_v == IPV4_VERSION)) { 1391 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL, 1392 "<== nxge_do_softlso: not IPV4 " 1393 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d", 1394 ntohs(oiph->ip_len), pktlen, ehlen, 1395 tcphlen)); 1396 freemsg(mp); 1397 return (NULL); 1398 } 1399 1400 if (!(oiph->ip_p == IPPROTO_TCP)) { 1401 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL, 1402 "<== nxge_do_softlso: not TCP " 1403 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d", 1404 ntohs(oiph->ip_len), pktlen, ehlen, 1405 tcphlen)); 1406 freemsg(mp); 1407 return (NULL); 1408 } 1409 1410 if (!(ntohs(oiph->ip_len) == pktlen - ehlen)) { 1411 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL, 1412 "<== nxge_do_softlso: len not matched " 1413 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d", 1414 ntohs(oiph->ip_len), pktlen, ehlen, 1415 tcphlen)); 1416 freemsg(mp); 1417 return (NULL); 1418 } 1419 1420 otcph = (struct tcphdr *)(mp->b_rptr + ehlen + iphlen); 1421 tcphlen = otcph->th_off * 4; 1422 1423 /* TCP flags can not include URG, RST, or SYN */ 1424 VERIFY((otcph->th_flags & (TH_SYN | TH_RST | TH_URG)) == 0); 1425 1426 hdrlen = ehlen + iphlen + tcphlen; 1427 1428 VERIFY(MBLKL(mp) >= hdrlen); 1429 1430 if (MBLKL(mp) > hdrlen) { 1431 datamp = mp; 1432 rptr = mp->b_rptr + hdrlen; 1433 } else { /* = */ 1434 datamp = mp->b_cont; 1435 rptr = datamp->b_rptr; 1436 } 1437 1438 NXGE_DEBUG_MSG((NULL, TX_CTL, 1439 "nxge_do_softlso: otcph $%p pktlen: %d, " 1440 "hdrlen %d ehlen %d iphlen %d tcphlen %d " 1441 "mblkl(mp): %d, mblkl(datamp): %d", 1442 otcph, 1443 pktlen, hdrlen, ehlen, iphlen, tcphlen, 1444 (int)MBLKL(mp), (int)MBLKL(datamp))); 1445 1446 hckflags = 0; 1447 nxge_hcksum_retrieve(mp, 1448 &start_offset, &stuff_offset, &value, NULL, &hckflags); 1449 1450 dst = oiph->ip_dst.s_addr; 1451 src = oiph->ip_src.s_addr; 1452 1453 cksum = (dst >> 16) + (dst & 0xFFFF) + 1454 (src >> 16) + (src & 0xFFFF); 1455 l4cksum = cksum + IP_TCP_CSUM_COMP; 1456 1457 sum = l4_len + l4cksum; 1458 sum = (sum & 0xFFFF) + (sum >> 16); 1459 1460 NXGE_DEBUG_MSG((NULL, TX_CTL, 1461 "==> nxge_do_softlso: dst 0x%x src 0x%x sum 0x%x ~new 0x%x " 1462 "hckflags 0x%x start_offset %d stuff_offset %d " 1463 "value (original) 0x%x th_sum 0x%x " 1464 "pktlen %d l4_len %d (0x%x) " 1465 "MBLKL(mp): %d, MBLKL(datamp): %d dump header %s", 1466 dst, src, 1467 (sum & 0xffff), (~sum & 0xffff), 1468 hckflags, start_offset, stuff_offset, 1469 value, otcph->th_sum, 1470 pktlen, 1471 l4_len, 1472 l4_len, 1473 ntohs(oiph->ip_len) - (int)MBLKL(mp), 1474 (int)MBLKL(datamp), 1475 nxge_dump_packet((char *)evh, 12))); 1476 1477 /* 1478 * Start to process. 1479 */ 1480 available = pktlen - hdrlen; 1481 segnum = (available - 1) / mss + 1; 1482 1483 NXGE_DEBUG_MSG((NULL, TX_CTL, 1484 "==> nxge_do_softlso: pktlen %d " 1485 "MBLKL(mp): %d, MBLKL(datamp): %d " 1486 "available %d mss %d segnum %d", 1487 pktlen, (int)MBLKL(mp), (int)MBLKL(datamp), 1488 available, 1489 mss, 1490 segnum)); 1491 1492 VERIFY(segnum >= 2); 1493 1494 /* 1495 * Try to pre-allocate all header messages 1496 */ 1497 mp_chain = NULL; 1498 for (i = 0; i < segnum; i++) { 1499 if ((nmp = allocb(hdrlen, 0)) == NULL) { 1500 /* Clean up the mp_chain */ 1501 while (mp_chain != NULL) { 1502 nmp = mp_chain; 1503 mp_chain = mp_chain->b_next; 1504 freemsg(nmp); 1505 } 1506 NXGE_DEBUG_MSG((NULL, TX_CTL, 1507 "<== nxge_do_softlso: " 1508 "Could not allocate enough messages for headers!")); 1509 freemsg(mp); 1510 return (NULL); 1511 } 1512 nmp->b_next = mp_chain; 1513 mp_chain = nmp; 1514 1515 NXGE_DEBUG_MSG((NULL, TX_CTL, 1516 "==> nxge_do_softlso: " 1517 "mp $%p nmp $%p mp_chain $%p mp_chain->b_next $%p", 1518 mp, nmp, mp_chain, mp_chain->b_next)); 1519 } 1520 1521 NXGE_DEBUG_MSG((NULL, TX_CTL, 1522 "==> nxge_do_softlso: mp $%p nmp $%p mp_chain $%p", 1523 mp, nmp, mp_chain)); 1524 1525 /* 1526 * Associate payload with new packets 1527 */ 1528 cmp = mp_chain; 1529 left = available; 1530 while (cmp != NULL) { 1531 nmp = dupb(datamp); 1532 if (nmp == NULL) { 1533 do_cleanup = B_TRUE; 1534 NXGE_DEBUG_MSG((NULL, TX_CTL, 1535 "==>nxge_do_softlso: " 1536 "Can not dupb(datamp), have to do clean up")); 1537 goto cleanup_allocated_msgs; 1538 } 1539 1540 NXGE_DEBUG_MSG((NULL, TX_CTL, 1541 "==> nxge_do_softlso: (loop) before mp $%p cmp $%p " 1542 "dupb nmp $%p len %d left %d msd %d ", 1543 mp, cmp, nmp, len, left, mss)); 1544 1545 cmp->b_cont = nmp; 1546 nmp->b_rptr = rptr; 1547 len = (left < mss) ? left : mss; 1548 left -= len; 1549 1550 NXGE_DEBUG_MSG((NULL, TX_CTL, 1551 "==> nxge_do_softlso: (loop) after mp $%p cmp $%p " 1552 "dupb nmp $%p len %d left %d mss %d ", 1553 mp, cmp, nmp, len, left, mss)); 1554 NXGE_DEBUG_MSG((NULL, TX_CTL, 1555 "nxge_do_softlso: before available: %d, " 1556 "left: %d, len: %d, segnum: %d MBLK(nmp): %d", 1557 available, left, len, segnum, (int)MBLKL(nmp))); 1558 1559 len -= MBLKL(nmp); 1560 NXGE_DEBUG_MSG((NULL, TX_CTL, 1561 "nxge_do_softlso: after available: %d, " 1562 "left: %d, len: %d, segnum: %d MBLK(nmp): %d", 1563 available, left, len, segnum, (int)MBLKL(nmp))); 1564 1565 while (len > 0) { 1566 mblk_t *mmp = NULL; 1567 1568 NXGE_DEBUG_MSG((NULL, TX_CTL, 1569 "nxge_do_softlso: (4) len > 0 available: %d, " 1570 "left: %d, len: %d, segnum: %d MBLK(nmp): %d", 1571 available, left, len, segnum, (int)MBLKL(nmp))); 1572 1573 if (datamp->b_cont != NULL) { 1574 datamp = datamp->b_cont; 1575 rptr = datamp->b_rptr; 1576 mmp = dupb(datamp); 1577 if (mmp == NULL) { 1578 do_cleanup = B_TRUE; 1579 NXGE_DEBUG_MSG((NULL, TX_CTL, 1580 "==> nxge_do_softlso: " 1581 "Can not dupb(datamp) (1), :" 1582 "have to do clean up")); 1583 NXGE_DEBUG_MSG((NULL, TX_CTL, 1584 "==> nxge_do_softlso: " 1585 "available: %d, left: %d, " 1586 "len: %d, MBLKL(nmp): %d", 1587 available, left, len, 1588 (int)MBLKL(nmp))); 1589 goto cleanup_allocated_msgs; 1590 } 1591 } else { 1592 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL, 1593 "==> nxge_do_softlso: " 1594 "(1)available: %d, left: %d, " 1595 "len: %d, MBLKL(nmp): %d", 1596 available, left, len, 1597 (int)MBLKL(nmp))); 1598 cmn_err(CE_PANIC, 1599 "==> nxge_do_softlso: " 1600 "Pointers must have been corrupted!\n" 1601 "datamp: $%p, nmp: $%p, rptr: $%p", 1602 (void *)datamp, 1603 (void *)nmp, 1604 (void *)rptr); 1605 } 1606 nmp->b_cont = mmp; 1607 nmp = mmp; 1608 len -= MBLKL(nmp); 1609 } 1610 if (len < 0) { 1611 nmp->b_wptr += len; 1612 rptr = nmp->b_wptr; 1613 NXGE_DEBUG_MSG((NULL, TX_CTL, 1614 "(5) len < 0 (less than 0)" 1615 "available: %d, left: %d, len: %d, MBLKL(nmp): %d", 1616 available, left, len, (int)MBLKL(nmp))); 1617 1618 } else if (len == 0) { 1619 if (datamp->b_cont != NULL) { 1620 NXGE_DEBUG_MSG((NULL, TX_CTL, 1621 "(5) len == 0" 1622 "available: %d, left: %d, len: %d, " 1623 "MBLKL(nmp): %d", 1624 available, left, len, (int)MBLKL(nmp))); 1625 datamp = datamp->b_cont; 1626 rptr = datamp->b_rptr; 1627 } else { 1628 NXGE_DEBUG_MSG((NULL, TX_CTL, 1629 "(6)available b_cont == NULL : %d, " 1630 "left: %d, len: %d, MBLKL(nmp): %d", 1631 available, left, len, (int)MBLKL(nmp))); 1632 1633 VERIFY(cmp->b_next == NULL); 1634 VERIFY(left == 0); 1635 break; /* Done! */ 1636 } 1637 } 1638 cmp = cmp->b_next; 1639 1640 NXGE_DEBUG_MSG((NULL, TX_CTL, 1641 "(7) do_softlso: " 1642 "next mp in mp_chain available len != 0 : %d, " 1643 "left: %d, len: %d, MBLKL(nmp): %d", 1644 available, left, len, (int)MBLKL(nmp))); 1645 } 1646 1647 /* 1648 * From now, start to fill up all headers for the first message 1649 * Hardware checksum flags need to be updated separately for FULLCKSUM 1650 * and PARTIALCKSUM cases. For full checksum, copy the original flags 1651 * into every new packet is enough. But for HCK_PARTIALCKSUM, all 1652 * required fields need to be updated properly. 1653 */ 1654 nmp = mp_chain; 1655 bcopy(mp->b_rptr, nmp->b_rptr, hdrlen); 1656 nmp->b_wptr = nmp->b_rptr + hdrlen; 1657 niph = (struct ip *)(nmp->b_rptr + ehlen); 1658 niph->ip_len = htons(mss + iphlen + tcphlen); 1659 ip_id = ntohs(niph->ip_id); 1660 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen); 1661 #ifdef __sparc 1662 bcopy((char *)&ntcph->th_seq, &tcp_seq_tmp, 4); 1663 tcp_seq = ntohl(tcp_seq_tmp); 1664 #else 1665 tcp_seq = ntohl(ntcph->th_seq); 1666 #endif 1667 1668 ntcph->th_flags &= ~(TH_FIN | TH_PUSH | TH_RST); 1669 1670 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags; 1671 DB_CKSUMSTART(nmp) = start_offset; 1672 DB_CKSUMSTUFF(nmp) = stuff_offset; 1673 1674 /* calculate IP checksum and TCP pseudo header checksum */ 1675 niph->ip_sum = 0; 1676 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen); 1677 1678 l4_len = mss + tcphlen; 1679 sum = htons(l4_len) + l4cksum; 1680 sum = (sum & 0xFFFF) + (sum >> 16); 1681 ntcph->th_sum = (sum & 0xffff); 1682 1683 NXGE_DEBUG_MSG((NULL, TX_CTL, 1684 "==> nxge_do_softlso: first mp $%p (mp_chain $%p) " 1685 "mss %d pktlen %d l4_len %d (0x%x) " 1686 "MBLKL(mp): %d, MBLKL(datamp): %d " 1687 "ip_sum 0x%x " 1688 "th_sum 0x%x sum 0x%x ) " 1689 "dump first ip->tcp %s", 1690 nmp, mp_chain, 1691 mss, 1692 pktlen, 1693 l4_len, 1694 l4_len, 1695 (int)MBLKL(mp), (int)MBLKL(datamp), 1696 niph->ip_sum, 1697 ntcph->th_sum, 1698 sum, 1699 nxge_dump_packet((char *)niph, 52))); 1700 1701 cmp = nmp; 1702 while ((nmp = nmp->b_next)->b_next != NULL) { 1703 NXGE_DEBUG_MSG((NULL, TX_CTL, 1704 "==>nxge_do_softlso: middle l4_len %d ", l4_len)); 1705 bcopy(cmp->b_rptr, nmp->b_rptr, hdrlen); 1706 nmp->b_wptr = nmp->b_rptr + hdrlen; 1707 niph = (struct ip *)(nmp->b_rptr + ehlen); 1708 niph->ip_id = htons(++ip_id); 1709 niph->ip_len = htons(mss + iphlen + tcphlen); 1710 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen); 1711 tcp_seq += mss; 1712 1713 ntcph->th_flags &= ~(TH_FIN | TH_PUSH | TH_RST | TH_URG); 1714 1715 #ifdef __sparc 1716 tcp_seq_tmp = htonl(tcp_seq); 1717 bcopy(&tcp_seq_tmp, (char *)&ntcph->th_seq, 4); 1718 #else 1719 ntcph->th_seq = htonl(tcp_seq); 1720 #endif 1721 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags; 1722 DB_CKSUMSTART(nmp) = start_offset; 1723 DB_CKSUMSTUFF(nmp) = stuff_offset; 1724 1725 /* calculate IP checksum and TCP pseudo header checksum */ 1726 niph->ip_sum = 0; 1727 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen); 1728 ntcph->th_sum = (sum & 0xffff); 1729 1730 NXGE_DEBUG_MSG((NULL, TX_CTL, 1731 "==> nxge_do_softlso: middle ip_sum 0x%x " 1732 "th_sum 0x%x " 1733 " mp $%p (mp_chain $%p) pktlen %d " 1734 "MBLKL(mp): %d, MBLKL(datamp): %d ", 1735 niph->ip_sum, 1736 ntcph->th_sum, 1737 nmp, mp_chain, 1738 pktlen, (int)MBLKL(mp), (int)MBLKL(datamp))); 1739 } 1740 1741 /* Last segment */ 1742 /* 1743 * Set FIN and/or PSH flags if present only in the last packet. 1744 * The ip_len could be different from prior packets. 1745 */ 1746 bcopy(cmp->b_rptr, nmp->b_rptr, hdrlen); 1747 nmp->b_wptr = nmp->b_rptr + hdrlen; 1748 niph = (struct ip *)(nmp->b_rptr + ehlen); 1749 niph->ip_id = htons(++ip_id); 1750 niph->ip_len = htons(msgsize(nmp->b_cont) + iphlen + tcphlen); 1751 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen); 1752 tcp_seq += mss; 1753 #ifdef __sparc 1754 tcp_seq_tmp = htonl(tcp_seq); 1755 bcopy(&tcp_seq_tmp, (char *)&ntcph->th_seq, 4); 1756 #else 1757 ntcph->th_seq = htonl(tcp_seq); 1758 #endif 1759 ntcph->th_flags = (otcph->th_flags & ~TH_URG); 1760 1761 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags; 1762 DB_CKSUMSTART(nmp) = start_offset; 1763 DB_CKSUMSTUFF(nmp) = stuff_offset; 1764 1765 /* calculate IP checksum and TCP pseudo header checksum */ 1766 niph->ip_sum = 0; 1767 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen); 1768 1769 l4_len = ntohs(niph->ip_len) - iphlen; 1770 sum = htons(l4_len) + l4cksum; 1771 sum = (sum & 0xFFFF) + (sum >> 16); 1772 ntcph->th_sum = (sum & 0xffff); 1773 1774 NXGE_DEBUG_MSG((NULL, TX_CTL, 1775 "==> nxge_do_softlso: last next " 1776 "niph->ip_sum 0x%x " 1777 "ntcph->th_sum 0x%x sum 0x%x " 1778 "dump last ip->tcp %s " 1779 "cmp $%p mp $%p (mp_chain $%p) pktlen %d (0x%x) " 1780 "l4_len %d (0x%x) " 1781 "MBLKL(mp): %d, MBLKL(datamp): %d ", 1782 niph->ip_sum, 1783 ntcph->th_sum, sum, 1784 nxge_dump_packet((char *)niph, 52), 1785 cmp, nmp, mp_chain, 1786 pktlen, pktlen, 1787 l4_len, 1788 l4_len, 1789 (int)MBLKL(mp), (int)MBLKL(datamp))); 1790 1791 cleanup_allocated_msgs: 1792 if (do_cleanup) { 1793 NXGE_DEBUG_MSG((NULL, TX_CTL, 1794 "==> nxge_do_softlso: " 1795 "Failed allocating messages, " 1796 "have to clean up and fail!")); 1797 while (mp_chain != NULL) { 1798 nmp = mp_chain; 1799 mp_chain = mp_chain->b_next; 1800 freemsg(nmp); 1801 } 1802 } 1803 /* 1804 * We're done here, so just free the original message and return the 1805 * new message chain, that could be NULL if failed, back to the caller. 1806 */ 1807 freemsg(mp); 1808 1809 NXGE_DEBUG_MSG((NULL, TX_CTL, 1810 "<== nxge_do_softlso:mp_chain $%p", mp_chain)); 1811 return (mp_chain); 1812 } 1813 1814 /* 1815 * Will be called before NIC driver do further operation on the message. 1816 * The input message may include LSO information, if so, go to softlso logic 1817 * to eliminate the oversized LSO packet for the incapable underlying h/w. 1818 * The return could be the same non-LSO message or a message chain for LSO case. 1819 * 1820 * The driver needs to call this function per packet and process the whole chain 1821 * if applied. 1822 */ 1823 static mblk_t * 1824 nxge_lso_eliminate(mblk_t *mp) 1825 { 1826 uint32_t lsoflags; 1827 uint32_t mss; 1828 1829 NXGE_DEBUG_MSG((NULL, TX_CTL, 1830 "==>nxge_lso_eliminate:")); 1831 nxge_lso_info_get(mp, &mss, &lsoflags); 1832 1833 if (lsoflags & HW_LSO) { 1834 mblk_t *nmp; 1835 1836 NXGE_DEBUG_MSG((NULL, TX_CTL, 1837 "==>nxge_lso_eliminate:" 1838 "HW_LSO:mss %d mp $%p", 1839 mss, mp)); 1840 if ((nmp = nxge_do_softlso(mp, mss)) != NULL) { 1841 NXGE_DEBUG_MSG((NULL, TX_CTL, 1842 "<== nxge_lso_eliminate: " 1843 "LSO: nmp not NULL nmp $%p mss %d mp $%p", 1844 nmp, mss, mp)); 1845 return (nmp); 1846 } else { 1847 NXGE_DEBUG_MSG((NULL, TX_CTL, 1848 "<== nxge_lso_eliminate_ " 1849 "LSO: failed nmp NULL nmp $%p mss %d mp $%p", 1850 nmp, mss, mp)); 1851 return (NULL); 1852 } 1853 } 1854 1855 NXGE_DEBUG_MSG((NULL, TX_CTL, 1856 "<== nxge_lso_eliminate")); 1857 return (mp); 1858 } 1859 1860 static uint32_t 1861 nxge_csgen(uint16_t *adr, int len) 1862 { 1863 int i, odd; 1864 uint32_t sum = 0; 1865 uint32_t c = 0; 1866 1867 odd = len % 2; 1868 for (i = 0; i < (len / 2); i++) { 1869 sum += (adr[i] & 0xffff); 1870 } 1871 if (odd) { 1872 sum += adr[len / 2] & 0xff00; 1873 } 1874 while ((c = ((sum & 0xffff0000) >> 16)) != 0) { 1875 sum &= 0xffff; 1876 sum += c; 1877 } 1878 return (~sum & 0xffff); 1879 } 1880