sfxge_tx.c revision 284555
1132718Skan/*- 2169689Skan * Copyright (c) 2010-2015 Solarflare Communications Inc. 3132718Skan * All rights reserved. 4132718Skan * 5132718Skan * This software was developed in part by Philip Paeps under contract for 6132718Skan * Solarflare Communications, Inc. 7132718Skan * 8132718Skan * Redistribution and use in source and binary forms, with or without 9132718Skan * modification, are permitted provided that the following conditions are met: 10132718Skan * 11132718Skan * 1. Redistributions of source code must retain the above copyright notice, 12132718Skan * this list of conditions and the following disclaimer. 13132718Skan * 2. Redistributions in binary form must reproduce the above copyright notice, 14132718Skan * this list of conditions and the following disclaimer in the documentation 15132718Skan * and/or other materials provided with the distribution. 16132718Skan * 17132718Skan * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18132718Skan * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19169689Skan * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20169689Skan * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 21132718Skan * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22132718Skan * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23132718Skan * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24132718Skan * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25132718Skan * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26132718Skan * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 27132718Skan * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28132718Skan * 29132718Skan * The views and conclusions contained in the software and documentation are 30132718Skan * those of the authors and should not be interpreted as representing official 31132718Skan * policies, either expressed or implied, of the FreeBSD Project. 32132718Skan */ 33132718Skan 34132718Skan/* Theory of operation: 35132718Skan * 36132718Skan * Tx queues allocation and mapping 37132718Skan * 38132718Skan * One Tx queue with enabled checksum offload is allocated per Rx channel 39132718Skan * (event queue). Also 2 Tx queues (one without checksum offload and one 40132718Skan * with IP checksum offload only) are allocated and bound to event queue 0. 41132718Skan * sfxge_txq_type is used as Tx queue label. 42132718Skan * 43132718Skan * So, event queue plus label mapping to Tx queue index is: 44132718Skan * if event queue index is 0, TxQ-index = TxQ-label * [0..SFXGE_TXQ_NTYPES) 45132718Skan * else TxQ-index = SFXGE_TXQ_NTYPES + EvQ-index - 1 46132718Skan * See sfxge_get_txq_by_label() sfxge_ev.c 47132718Skan */ 48132718Skan 49132718Skan#include <sys/cdefs.h> 50132718Skan__FBSDID("$FreeBSD: stable/10/sys/dev/sfxge/sfxge_tx.c 284555 2015-06-18 15:46:39Z arybchik $"); 51132718Skan 52132718Skan#include <sys/types.h> 53132718Skan#include <sys/mbuf.h> 54132718Skan#include <sys/smp.h> 55132718Skan#include <sys/socket.h> 56132718Skan#include <sys/sysctl.h> 57132718Skan#include <sys/syslog.h> 58169689Skan 59132718Skan#include <net/bpf.h> 60132718Skan#include <net/ethernet.h> 61132718Skan#include <net/if.h> 62132718Skan#include <net/if_vlan_var.h> 63169689Skan 64132718Skan#include <netinet/in.h> 65132718Skan#include <netinet/ip.h> 66132718Skan#include <netinet/ip6.h> 67169689Skan#include <netinet/tcp.h> 68132718Skan 69132718Skan#include "common/efx.h" 70132718Skan 71132718Skan#include "sfxge.h" 72132718Skan#include "sfxge_tx.h" 73132718Skan 74132718Skan 75169689Skan#define SFXGE_PARAM_TX_DPL_GET_MAX SFXGE_PARAM(tx_dpl_get_max) 76132718Skanstatic int sfxge_tx_dpl_get_max = SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT; 77132718SkanTUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_MAX, &sfxge_tx_dpl_get_max); 78132718SkanSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_max, CTLFLAG_RDTUN, 79132718Skan &sfxge_tx_dpl_get_max, 0, 80132718Skan "Maximum number of any packets in deferred packet get-list"); 81132718Skan 82132718Skan#define SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX \ 83132718Skan SFXGE_PARAM(tx_dpl_get_non_tcp_max) 84169689Skanstatic int sfxge_tx_dpl_get_non_tcp_max = 85169689Skan SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT; 86169689SkanTUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, &sfxge_tx_dpl_get_non_tcp_max); 87132718SkanSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_non_tcp_max, CTLFLAG_RDTUN, 88132718Skan &sfxge_tx_dpl_get_non_tcp_max, 0, 89132718Skan "Maximum number of non-TCP packets in deferred packet get-list"); 90132718Skan 91132718Skan#define SFXGE_PARAM_TX_DPL_PUT_MAX SFXGE_PARAM(tx_dpl_put_max) 92132718Skanstatic int sfxge_tx_dpl_put_max = SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT; 93132718SkanTUNABLE_INT(SFXGE_PARAM_TX_DPL_PUT_MAX, &sfxge_tx_dpl_put_max); 94132718SkanSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_put_max, CTLFLAG_RDTUN, 95132718Skan &sfxge_tx_dpl_put_max, 0, 96132718Skan "Maximum number of any packets in deferred packet put-list"); 97132718Skan 98132718Skan#define SFXGE_PARAM_TSO_FW_ASSISTED SFXGE_PARAM(tso_fw_assisted) 99132718Skanstatic int sfxge_tso_fw_assisted = 1; 100132718SkanTUNABLE_INT(SFXGE_PARAM_TSO_FW_ASSISTED, &sfxge_tso_fw_assisted); 101132718SkanSYSCTL_INT(_hw_sfxge, OID_AUTO, tso_fw_assisted, CTLFLAG_RDTUN, 102132718Skan &sfxge_tso_fw_assisted, 0, 103132718Skan "Use FW-assisted TSO if supported by NIC firmware"); 104132718Skan 105132718Skan 106132718Skanstatic const struct { 107132718Skan const char *name; 108132718Skan size_t offset; 109132718Skan} sfxge_tx_stats[] = { 110169689Skan#define SFXGE_TX_STAT(name, member) \ 111132718Skan { #name, offsetof(struct sfxge_txq, member) } 112169689Skan SFXGE_TX_STAT(tso_bursts, tso_bursts), 113132718Skan SFXGE_TX_STAT(tso_packets, tso_packets), 114132718Skan SFXGE_TX_STAT(tso_long_headers, tso_long_headers), 115132718Skan SFXGE_TX_STAT(tso_pdrop_too_many, tso_pdrop_too_many), 116132718Skan SFXGE_TX_STAT(tso_pdrop_no_rsrc, tso_pdrop_no_rsrc), 117169689Skan SFXGE_TX_STAT(tx_collapses, collapses), 118132718Skan SFXGE_TX_STAT(tx_drops, drops), 119132718Skan SFXGE_TX_STAT(tx_get_overflow, get_overflow), 120132718Skan SFXGE_TX_STAT(tx_get_non_tcp_overflow, get_non_tcp_overflow), 121132718Skan SFXGE_TX_STAT(tx_put_overflow, put_overflow), 122132718Skan SFXGE_TX_STAT(tx_netdown_drops, netdown_drops), 123169689Skan}; 124132718Skan 125169689Skan 126132718Skan/* Forward declarations. */ 127132718Skanstatic void sfxge_tx_qdpl_service(struct sfxge_txq *txq); 128132718Skanstatic void sfxge_tx_qlist_post(struct sfxge_txq *txq); 129132718Skanstatic void sfxge_tx_qunblock(struct sfxge_txq *txq); 130169689Skanstatic int sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 131132718Skan const bus_dma_segment_t *dma_seg, int n_dma_seg, 132132718Skan int vlan_tagged); 133132718Skan 134132718Skanstatic int 135132718Skansfxge_tx_maybe_insert_tag(struct sfxge_txq *txq, struct mbuf *mbuf) 136132718Skan{ 137132718Skan uint16_t this_tag = ((mbuf->m_flags & M_VLANTAG) ? 138132718Skan mbuf->m_pkthdr.ether_vtag : 139132718Skan 0); 140132718Skan 141132718Skan if (this_tag == txq->hw_vlan_tci) 142169689Skan return (0); 143132718Skan 144132718Skan efx_tx_qdesc_vlantci_create(txq->common, 145132718Skan bswap16(this_tag), 146169689Skan &txq->pend_desc[0]); 147132718Skan txq->n_pend_desc = 1; 148132718Skan txq->hw_vlan_tci = this_tag; 149132718Skan return (1); 150169689Skan} 151132718Skan 152132718Skanstatic inline void 153132718Skansfxge_next_stmp(struct sfxge_txq *txq, struct sfxge_tx_mapping **pstmp) 154132718Skan{ 155132718Skan KASSERT((*pstmp)->flags == 0, ("stmp flags are not 0")); 156132718Skan if (__predict_false(*pstmp == 157132718Skan &txq->stmp[txq->ptr_mask])) 158132718Skan *pstmp = &txq->stmp[0]; 159132718Skan else 160132718Skan (*pstmp)++; 161169689Skan} 162132718Skan 163169689Skan 164132718Skanvoid 165132718Skansfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq) 166132718Skan{ 167132718Skan unsigned int completed; 168169689Skan 169132718Skan SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 170169689Skan 171169689Skan completed = txq->completed; 172169689Skan while (completed != txq->pending) { 173132718Skan struct sfxge_tx_mapping *stmp; 174132718Skan unsigned int id; 175132718Skan 176132718Skan id = completed++ & txq->ptr_mask; 177132718Skan 178132718Skan stmp = &txq->stmp[id]; 179132718Skan if (stmp->flags & TX_BUF_UNMAP) { 180132718Skan bus_dmamap_unload(txq->packet_dma_tag, stmp->map); 181132718Skan if (stmp->flags & TX_BUF_MBUF) { 182132718Skan struct mbuf *m = stmp->u.mbuf; 183132718Skan do 184132718Skan m = m_free(m); 185132718Skan while (m != NULL); 186132718Skan } else { 187132718Skan free(stmp->u.heap_buf, M_SFXGE); 188132718Skan } 189132718Skan stmp->flags = 0; 190132718Skan } 191132718Skan } 192132718Skan txq->completed = completed; 193132718Skan 194132718Skan /* Check whether we need to unblock the queue. */ 195132718Skan mb(); 196132718Skan if (txq->blocked) { 197132718Skan unsigned int level; 198132718Skan 199132718Skan level = txq->added - txq->completed; 200132718Skan if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) 201132718Skan sfxge_tx_qunblock(txq); 202132718Skan } 203132718Skan} 204132718Skan 205132718Skanstatic unsigned int 206132718Skansfxge_is_mbuf_non_tcp(struct mbuf *mbuf) 207132718Skan{ 208132718Skan /* Absense of TCP checksum flags does not mean that it is non-TCP 209132718Skan * but it should be true if user wants to achieve high throughput. 210132718Skan */ 211132718Skan return (!(mbuf->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP))); 212132718Skan} 213132718Skan 214132718Skan/* 215132718Skan * Reorder the put list and append it to the get list. 216132718Skan */ 217169689Skanstatic void 218132718Skansfxge_tx_qdpl_swizzle(struct sfxge_txq *txq) 219132718Skan{ 220132718Skan struct sfxge_tx_dpl *stdp; 221132718Skan struct mbuf *mbuf, *get_next, **get_tailp; 222132718Skan volatile uintptr_t *putp; 223132718Skan uintptr_t put; 224132718Skan unsigned int count; 225132718Skan unsigned int non_tcp_count; 226132718Skan 227132718Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 228132718Skan 229132718Skan stdp = &txq->dpl; 230132718Skan 231132718Skan /* Acquire the put list. */ 232132718Skan putp = &stdp->std_put; 233169689Skan put = atomic_readandclear_ptr(putp); 234132718Skan mbuf = (void *)put; 235132718Skan 236132718Skan if (mbuf == NULL) 237132718Skan return; 238132718Skan 239132718Skan /* Reverse the put list. */ 240132718Skan get_tailp = &mbuf->m_nextpkt; 241132718Skan get_next = NULL; 242132718Skan 243132718Skan count = 0; 244132718Skan non_tcp_count = 0; 245132718Skan do { 246132718Skan struct mbuf *put_next; 247132718Skan 248132718Skan non_tcp_count += sfxge_is_mbuf_non_tcp(mbuf); 249132718Skan put_next = mbuf->m_nextpkt; 250132718Skan mbuf->m_nextpkt = get_next; 251132718Skan get_next = mbuf; 252132718Skan mbuf = put_next; 253132718Skan 254132718Skan count++; 255132718Skan } while (mbuf != NULL); 256132718Skan 257132718Skan if (count > stdp->std_put_hiwat) 258132718Skan stdp->std_put_hiwat = count; 259132718Skan 260132718Skan /* Append the reversed put list to the get list. */ 261132718Skan KASSERT(*get_tailp == NULL, ("*get_tailp != NULL")); 262132718Skan *stdp->std_getp = get_next; 263132718Skan stdp->std_getp = get_tailp; 264132718Skan stdp->std_get_count += count; 265132718Skan stdp->std_get_non_tcp_count += non_tcp_count; 266132718Skan} 267132718Skan 268132718Skanstatic void 269132718Skansfxge_tx_qreap(struct sfxge_txq *txq) 270132718Skan{ 271132718Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 272132718Skan 273132718Skan txq->reaped = txq->completed; 274132718Skan} 275132718Skan 276132718Skanstatic void 277132718Skansfxge_tx_qlist_post(struct sfxge_txq *txq) 278132718Skan{ 279132718Skan unsigned int old_added; 280132718Skan unsigned int block_level; 281132718Skan unsigned int level; 282132718Skan int rc; 283132718Skan 284132718Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 285132718Skan 286132718Skan KASSERT(txq->n_pend_desc != 0, ("txq->n_pend_desc == 0")); 287132718Skan KASSERT(txq->n_pend_desc <= txq->max_pkt_desc, 288132718Skan ("txq->n_pend_desc too large")); 289132718Skan KASSERT(!txq->blocked, ("txq->blocked")); 290132718Skan 291132718Skan old_added = txq->added; 292132718Skan 293132718Skan /* Post the fragment list. */ 294132718Skan rc = efx_tx_qdesc_post(txq->common, txq->pend_desc, txq->n_pend_desc, 295132718Skan txq->reaped, &txq->added); 296169689Skan KASSERT(rc == 0, ("efx_tx_qdesc_post() failed")); 297132718Skan 298132718Skan /* If efx_tx_qdesc_post() had to refragment, our information about 299132718Skan * buffers to free may be associated with the wrong 300132718Skan * descriptors. 301132718Skan */ 302169689Skan KASSERT(txq->added - old_added == txq->n_pend_desc, 303132718Skan ("efx_tx_qdesc_post() refragmented descriptors")); 304132718Skan 305132718Skan level = txq->added - txq->reaped; 306132718Skan KASSERT(level <= txq->entries, ("overfilled TX queue")); 307132718Skan 308132718Skan /* Clear the fragment list. */ 309132718Skan txq->n_pend_desc = 0; 310132718Skan 311132718Skan /* 312132718Skan * Set the block level to ensure there is space to generate a 313132718Skan * large number of descriptors for TSO. 314132718Skan */ 315132718Skan block_level = EFX_TXQ_LIMIT(txq->entries) - txq->max_pkt_desc; 316132718Skan 317132718Skan /* Have we reached the block level? */ 318132718Skan if (level < block_level) 319132718Skan return; 320132718Skan 321132718Skan /* Reap, and check again */ 322132718Skan sfxge_tx_qreap(txq); 323132718Skan level = txq->added - txq->reaped; 324132718Skan if (level < block_level) 325132718Skan return; 326132718Skan 327132718Skan txq->blocked = 1; 328132718Skan 329169689Skan /* 330132718Skan * Avoid a race with completion interrupt handling that could leave 331132718Skan * the queue blocked. 332132718Skan */ 333132718Skan mb(); 334169689Skan sfxge_tx_qreap(txq); 335132718Skan level = txq->added - txq->reaped; 336132718Skan if (level < block_level) { 337132718Skan mb(); 338132718Skan txq->blocked = 0; 339132718Skan } 340132718Skan} 341132718Skan 342132718Skanstatic int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf) 343132718Skan{ 344132718Skan bus_dmamap_t *used_map; 345132718Skan bus_dmamap_t map; 346132718Skan bus_dma_segment_t dma_seg[SFXGE_TX_MAPPING_MAX_SEG]; 347132718Skan unsigned int id; 348132718Skan struct sfxge_tx_mapping *stmp; 349132718Skan efx_desc_t *desc; 350132718Skan int n_dma_seg; 351132718Skan int rc; 352132718Skan int i; 353132718Skan int eop; 354132718Skan int vlan_tagged; 355132718Skan 356132718Skan KASSERT(!txq->blocked, ("txq->blocked")); 357132718Skan 358132718Skan if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) 359132718Skan prefetch_read_many(mbuf->m_data); 360132718Skan 361132718Skan if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) { 362132718Skan rc = EINTR; 363132718Skan goto reject; 364132718Skan } 365132718Skan 366132718Skan /* Load the packet for DMA. */ 367132718Skan id = txq->added & txq->ptr_mask; 368132718Skan stmp = &txq->stmp[id]; 369132718Skan rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, stmp->map, 370132718Skan mbuf, dma_seg, &n_dma_seg, 0); 371132718Skan if (rc == EFBIG) { 372169689Skan /* Try again. */ 373132718Skan struct mbuf *new_mbuf = m_collapse(mbuf, M_NOWAIT, 374132718Skan SFXGE_TX_MAPPING_MAX_SEG); 375132718Skan if (new_mbuf == NULL) 376132718Skan goto reject; 377132718Skan ++txq->collapses; 378169689Skan mbuf = new_mbuf; 379132718Skan rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, 380132718Skan stmp->map, mbuf, 381132718Skan dma_seg, &n_dma_seg, 0); 382132718Skan } 383132718Skan if (rc != 0) 384132718Skan goto reject; 385132718Skan 386132718Skan /* Make the packet visible to the hardware. */ 387132718Skan bus_dmamap_sync(txq->packet_dma_tag, stmp->map, BUS_DMASYNC_PREWRITE); 388132718Skan 389132718Skan used_map = &stmp->map; 390132718Skan 391132718Skan vlan_tagged = sfxge_tx_maybe_insert_tag(txq, mbuf); 392132718Skan if (vlan_tagged) { 393132718Skan sfxge_next_stmp(txq, &stmp); 394132718Skan } 395132718Skan if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) { 396132718Skan rc = sfxge_tx_queue_tso(txq, mbuf, dma_seg, n_dma_seg, vlan_tagged); 397132718Skan if (rc < 0) 398169689Skan goto reject_mapped; 399169689Skan stmp = &txq->stmp[(rc - 1) & txq->ptr_mask]; 400169689Skan } else { 401132718Skan /* Add the mapping to the fragment list, and set flags 402132718Skan * for the buffer. 403132718Skan */ 404132718Skan 405132718Skan i = 0; 406132718Skan for (;;) { 407169689Skan desc = &txq->pend_desc[i + vlan_tagged]; 408132718Skan eop = (i == n_dma_seg - 1); 409132718Skan efx_tx_qdesc_dma_create(txq->common, 410132718Skan dma_seg[i].ds_addr, 411132718Skan dma_seg[i].ds_len, 412132718Skan eop, 413169689Skan desc); 414132718Skan if (eop) 415132718Skan break; 416132718Skan i++; 417169689Skan sfxge_next_stmp(txq, &stmp); 418169689Skan } 419132718Skan txq->n_pend_desc = n_dma_seg + vlan_tagged; 420132718Skan } 421132718Skan 422132718Skan /* 423132718Skan * If the mapping required more than one descriptor 424132718Skan * then we need to associate the DMA map with the last 425132718Skan * descriptor, not the first. 426132718Skan */ 427132718Skan if (used_map != &stmp->map) { 428132718Skan map = stmp->map; 429132718Skan stmp->map = *used_map; 430132718Skan *used_map = map; 431132718Skan } 432132718Skan 433132718Skan stmp->u.mbuf = mbuf; 434169689Skan stmp->flags = TX_BUF_UNMAP | TX_BUF_MBUF; 435132718Skan 436169689Skan /* Post the fragment list. */ 437132718Skan sfxge_tx_qlist_post(txq); 438132718Skan 439132718Skan return (0); 440169689Skan 441169689Skanreject_mapped: 442132718Skan bus_dmamap_unload(txq->packet_dma_tag, *used_map); 443169689Skanreject: 444132718Skan /* Drop the packet on the floor. */ 445132718Skan m_freem(mbuf); 446132718Skan ++txq->drops; 447132718Skan 448169689Skan return (rc); 449169689Skan} 450169689Skan 451169689Skan/* 452132718Skan * Drain the deferred packet list into the transmit queue. 453132718Skan */ 454132718Skanstatic void 455132718Skansfxge_tx_qdpl_drain(struct sfxge_txq *txq) 456132718Skan{ 457132718Skan struct sfxge_softc *sc; 458132718Skan struct sfxge_tx_dpl *stdp; 459132718Skan struct mbuf *mbuf, *next; 460132718Skan unsigned int count; 461169689Skan unsigned int non_tcp_count; 462132718Skan unsigned int pushed; 463132718Skan int rc; 464169689Skan 465169689Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 466132718Skan 467132718Skan sc = txq->sc; 468132718Skan stdp = &txq->dpl; 469132718Skan pushed = txq->added; 470132718Skan 471132718Skan if (__predict_true(txq->init_state == SFXGE_TXQ_STARTED)) { 472169689Skan prefetch_read_many(sc->enp); 473132718Skan prefetch_read_many(txq->common); 474132718Skan } 475132718Skan 476132718Skan mbuf = stdp->std_get; 477169689Skan count = stdp->std_get_count; 478132718Skan non_tcp_count = stdp->std_get_non_tcp_count; 479132718Skan 480132718Skan if (count > stdp->std_get_hiwat) 481132718Skan stdp->std_get_hiwat = count; 482132718Skan 483132718Skan while (count != 0) { 484132718Skan KASSERT(mbuf != NULL, ("mbuf == NULL")); 485132718Skan 486132718Skan next = mbuf->m_nextpkt; 487132718Skan mbuf->m_nextpkt = NULL; 488132718Skan 489132718Skan ETHER_BPF_MTAP(sc->ifnet, mbuf); /* packet capture */ 490169689Skan 491132718Skan if (next != NULL) 492169689Skan prefetch_read_many(next); 493132718Skan 494132718Skan rc = sfxge_tx_queue_mbuf(txq, mbuf); 495132718Skan --count; 496132718Skan non_tcp_count -= sfxge_is_mbuf_non_tcp(mbuf); 497132718Skan mbuf = next; 498132718Skan if (rc != 0) 499132718Skan continue; 500132718Skan 501132718Skan if (txq->blocked) 502132718Skan break; 503132718Skan 504132718Skan /* Push the fragments to the hardware in batches. */ 505132718Skan if (txq->added - pushed >= SFXGE_TX_BATCH) { 506132718Skan efx_tx_qpush(txq->common, txq->added, pushed); 507132718Skan pushed = txq->added; 508132718Skan } 509132718Skan } 510132718Skan 511132718Skan if (count == 0) { 512132718Skan KASSERT(mbuf == NULL, ("mbuf != NULL")); 513132718Skan KASSERT(non_tcp_count == 0, 514132718Skan ("inconsistent TCP/non-TCP detection")); 515132718Skan stdp->std_get = NULL; 516169689Skan stdp->std_get_count = 0; 517132718Skan stdp->std_get_non_tcp_count = 0; 518132718Skan stdp->std_getp = &stdp->std_get; 519169689Skan } else { 520132718Skan stdp->std_get = mbuf; 521132718Skan stdp->std_get_count = count; 522169689Skan stdp->std_get_non_tcp_count = non_tcp_count; 523132718Skan } 524132718Skan 525132718Skan if (txq->added != pushed) 526132718Skan efx_tx_qpush(txq->common, txq->added, pushed); 527132718Skan 528132718Skan KASSERT(txq->blocked || stdp->std_get_count == 0, 529132718Skan ("queue unblocked but count is non-zero")); 530132718Skan} 531132718Skan 532132718Skan#define SFXGE_TX_QDPL_PENDING(_txq) ((_txq)->dpl.std_put != 0) 533132718Skan 534132718Skan/* 535132718Skan * Service the deferred packet list. 536169689Skan * 537132718Skan * NOTE: drops the txq mutex! 538132718Skan */ 539132718Skanstatic void 540132718Skansfxge_tx_qdpl_service(struct sfxge_txq *txq) 541132718Skan{ 542132718Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 543132718Skan 544132718Skan do { 545132718Skan if (SFXGE_TX_QDPL_PENDING(txq)) 546132718Skan sfxge_tx_qdpl_swizzle(txq); 547132718Skan 548132718Skan if (!txq->blocked) 549132718Skan sfxge_tx_qdpl_drain(txq); 550132718Skan 551132718Skan SFXGE_TXQ_UNLOCK(txq); 552169689Skan } while (SFXGE_TX_QDPL_PENDING(txq) && 553169689Skan SFXGE_TXQ_TRYLOCK(txq)); 554169689Skan} 555169689Skan 556169689Skan/* 557169689Skan * Put a packet on the deferred packet get-list. 558169689Skan */ 559169689Skanstatic int 560169689Skansfxge_tx_qdpl_put_locked(struct sfxge_txq *txq, struct mbuf *mbuf) 561169689Skan{ 562169689Skan struct sfxge_tx_dpl *stdp; 563169689Skan 564169689Skan stdp = &txq->dpl; 565169689Skan 566169689Skan KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 567169689Skan 568169689Skan SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 569132718Skan 570132718Skan if (stdp->std_get_count >= stdp->std_get_max) { 571132718Skan txq->get_overflow++; 572132718Skan return (ENOBUFS); 573132718Skan } 574132718Skan if (sfxge_is_mbuf_non_tcp(mbuf)) { 575132718Skan if (stdp->std_get_non_tcp_count >= 576132718Skan stdp->std_get_non_tcp_max) { 577132718Skan txq->get_non_tcp_overflow++; 578132718Skan return (ENOBUFS); 579132718Skan } 580132718Skan stdp->std_get_non_tcp_count++; 581169689Skan } 582132718Skan 583169689Skan *(stdp->std_getp) = mbuf; 584132718Skan stdp->std_getp = &mbuf->m_nextpkt; 585132718Skan stdp->std_get_count++; 586132718Skan 587132718Skan return (0); 588132718Skan} 589132718Skan 590132718Skan/* 591132718Skan * Put a packet on the deferred packet put-list. 592169689Skan * 593132718Skan * We overload the csum_data field in the mbuf to keep track of this length 594132718Skan * because there is no cheap alternative to avoid races. 595132718Skan */ 596132718Skanstatic int 597132718Skansfxge_tx_qdpl_put_unlocked(struct sfxge_txq *txq, struct mbuf *mbuf) 598132718Skan{ 599132718Skan struct sfxge_tx_dpl *stdp; 600132718Skan volatile uintptr_t *putp; 601132718Skan uintptr_t old; 602132718Skan uintptr_t new; 603132718Skan unsigned old_len; 604132718Skan 605169689Skan KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 606132718Skan 607132718Skan SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 608132718Skan 609132718Skan stdp = &txq->dpl; 610169689Skan putp = &stdp->std_put; 611132718Skan new = (uintptr_t)mbuf; 612132718Skan 613132718Skan do { 614132718Skan old = *putp; 615132718Skan if (old != 0) { 616132718Skan struct mbuf *mp = (struct mbuf *)old; 617132718Skan old_len = mp->m_pkthdr.csum_data; 618132718Skan } else 619132718Skan old_len = 0; 620132718Skan if (old_len >= stdp->std_put_max) { 621132718Skan atomic_add_long(&txq->put_overflow, 1); 622132718Skan return (ENOBUFS); 623132718Skan } 624132718Skan mbuf->m_pkthdr.csum_data = old_len + 1; 625132718Skan mbuf->m_nextpkt = (void *)old; 626132718Skan } while (atomic_cmpset_ptr(putp, old, new) == 0); 627132718Skan 628132718Skan return (0); 629132718Skan} 630132718Skan 631132718Skan/* 632132718Skan * Called from if_transmit - will try to grab the txq lock and enqueue to the 633132718Skan * put list if it succeeds, otherwise try to push onto the defer list if space. 634132718Skan */ 635132718Skanstatic int 636132718Skansfxge_tx_packet_add(struct sfxge_txq *txq, struct mbuf *m) 637132718Skan{ 638169689Skan int rc; 639169689Skan 640169689Skan if (!SFXGE_LINK_UP(txq->sc)) { 641132718Skan atomic_add_long(&txq->netdown_drops, 1); 642132718Skan return (ENETDOWN); 643132718Skan } 644132718Skan 645132718Skan /* 646132718Skan * Try to grab the txq lock. If we are able to get the lock, 647132718Skan * the packet will be appended to the "get list" of the deferred 648132718Skan * packet list. Otherwise, it will be pushed on the "put list". 649132718Skan */ 650132718Skan if (SFXGE_TXQ_TRYLOCK(txq)) { 651169689Skan /* First swizzle put-list to get-list to keep order */ 652132718Skan sfxge_tx_qdpl_swizzle(txq); 653132718Skan 654132718Skan rc = sfxge_tx_qdpl_put_locked(txq, m); 655132718Skan 656132718Skan /* Try to service the list. */ 657132718Skan sfxge_tx_qdpl_service(txq); 658132718Skan /* Lock has been dropped. */ 659132718Skan } else { 660132718Skan rc = sfxge_tx_qdpl_put_unlocked(txq, m); 661132718Skan 662132718Skan /* 663132718Skan * Try to grab the lock again. 664132718Skan * 665132718Skan * If we are able to get the lock, we need to process 666132718Skan * the deferred packet list. If we are not able to get 667132718Skan * the lock, another thread is processing the list. 668132718Skan */ 669132718Skan if ((rc == 0) && SFXGE_TXQ_TRYLOCK(txq)) { 670132718Skan sfxge_tx_qdpl_service(txq); 671132718Skan /* Lock has been dropped. */ 672132718Skan } 673132718Skan } 674132718Skan 675132718Skan SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 676132718Skan 677132718Skan return (rc); 678132718Skan} 679132718Skan 680132718Skanstatic void 681132718Skansfxge_tx_qdpl_flush(struct sfxge_txq *txq) 682132718Skan{ 683132718Skan struct sfxge_tx_dpl *stdp = &txq->dpl; 684132718Skan struct mbuf *mbuf, *next; 685132718Skan 686132718Skan SFXGE_TXQ_LOCK(txq); 687132718Skan 688132718Skan sfxge_tx_qdpl_swizzle(txq); 689132718Skan for (mbuf = stdp->std_get; mbuf != NULL; mbuf = next) { 690132718Skan next = mbuf->m_nextpkt; 691132718Skan m_freem(mbuf); 692132718Skan } 693132718Skan stdp->std_get = NULL; 694132718Skan stdp->std_get_count = 0; 695132718Skan stdp->std_get_non_tcp_count = 0; 696132718Skan stdp->std_getp = &stdp->std_get; 697132718Skan 698132718Skan SFXGE_TXQ_UNLOCK(txq); 699132718Skan} 700132718Skan 701132718Skanvoid 702132718Skansfxge_if_qflush(struct ifnet *ifp) 703132718Skan{ 704132718Skan struct sfxge_softc *sc; 705132718Skan unsigned int i; 706169689Skan 707169689Skan sc = ifp->if_softc; 708169689Skan 709169689Skan for (i = 0; i < sc->txq_count; i++) 710169689Skan sfxge_tx_qdpl_flush(sc->txq[i]); 711169689Skan} 712132718Skan 713132718Skan/* 714132718Skan * TX start -- called by the stack. 715132718Skan */ 716132718Skanint 717132718Skansfxge_if_transmit(struct ifnet *ifp, struct mbuf *m) 718132718Skan{ 719132718Skan struct sfxge_softc *sc; 720132718Skan struct sfxge_txq *txq; 721132718Skan int rc; 722132718Skan 723169689Skan sc = (struct sfxge_softc *)ifp->if_softc; 724169689Skan 725169689Skan /* 726169689Skan * Transmit may be called when interface is up from the kernel 727132718Skan * point of view, but not yet up (in progress) from the driver 728132718Skan * point of view. I.e. link aggregation bring up. 729132718Skan * Transmit may be called when interface is up from the driver 730132718Skan * point of view, but already down from the kernel point of 731132718Skan * view. I.e. Rx when interface shutdown is in progress. 732169689Skan */ 733132718Skan KASSERT((ifp->if_flags & IFF_UP) || (sc->if_flags & IFF_UP), 734132718Skan ("interface not up")); 735132718Skan 736132718Skan /* Pick the desired transmit queue. */ 737132718Skan if (m->m_pkthdr.csum_flags & 738132718Skan (CSUM_DELAY_DATA | CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_TSO)) { 739132718Skan int index = 0; 740132718Skan 741132718Skan /* check if flowid is set */ 742132718Skan if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) { 743169689Skan uint32_t hash = m->m_pkthdr.flowid; 744132718Skan 745132718Skan index = sc->rx_indir_table[hash % SFXGE_RX_SCALE_MAX]; 746132718Skan } 747132718Skan txq = sc->txq[SFXGE_TXQ_IP_TCP_UDP_CKSUM + index]; 748132718Skan } else if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) { 749132718Skan txq = sc->txq[SFXGE_TXQ_IP_CKSUM]; 750132718Skan } else { 751132718Skan txq = sc->txq[SFXGE_TXQ_NON_CKSUM]; 752132718Skan } 753132718Skan 754132718Skan rc = sfxge_tx_packet_add(txq, m); 755132718Skan if (rc != 0) 756132718Skan m_freem(m); 757169689Skan 758132718Skan return (rc); 759132718Skan} 760132718Skan 761132718Skan/* 762132718Skan * Software "TSO". Not quite as good as doing it in hardware, but 763132718Skan * still faster than segmenting in the stack. 764132718Skan */ 765132718Skan 766132718Skanstruct sfxge_tso_state { 767132718Skan /* Output position */ 768132718Skan unsigned out_len; /* Remaining length in current segment */ 769132718Skan unsigned seqnum; /* Current sequence number */ 770132718Skan unsigned packet_space; /* Remaining space in current packet */ 771132718Skan 772132718Skan /* Input position */ 773132718Skan uint64_t dma_addr; /* DMA address of current position */ 774132718Skan unsigned in_len; /* Remaining length in current mbuf */ 775132718Skan 776132718Skan const struct mbuf *mbuf; /* Input mbuf (head of chain) */ 777132718Skan u_short protocol; /* Network protocol (after VLAN decap) */ 778132718Skan ssize_t nh_off; /* Offset of network header */ 779132718Skan ssize_t tcph_off; /* Offset of TCP header */ 780132718Skan unsigned header_len; /* Number of bytes of header */ 781132718Skan unsigned seg_size; /* TCP segment size */ 782132718Skan int fw_assisted; /* Use FW-assisted TSO */ 783132718Skan u_short packet_id; /* IPv4 packet ID from the original packet */ 784132718Skan efx_desc_t header_desc; /* Precomputed header descriptor for 785132718Skan * FW-assisted TSO */ 786132718Skan}; 787132718Skan 788132718Skanstatic const struct ip *tso_iph(const struct sfxge_tso_state *tso) 789132718Skan{ 790222082Sbenl KASSERT(tso->protocol == htons(ETHERTYPE_IP), 791132718Skan ("tso_iph() in non-IPv4 state")); 792132718Skan return (const struct ip *)(tso->mbuf->m_data + tso->nh_off); 793132718Skan} 794132718Skanstatic __unused const struct ip6_hdr *tso_ip6h(const struct sfxge_tso_state *tso) 795132718Skan{ 796132718Skan KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 797132718Skan ("tso_ip6h() in non-IPv6 state")); 798132718Skan return (const struct ip6_hdr *)(tso->mbuf->m_data + tso->nh_off); 799132718Skan} 800132718Skanstatic const struct tcphdr *tso_tcph(const struct sfxge_tso_state *tso) 801132718Skan{ 802132718Skan return (const struct tcphdr *)(tso->mbuf->m_data + tso->tcph_off); 803132718Skan} 804132718Skan 805132718Skan/* Size of preallocated TSO header buffers. Larger blocks must be 806169689Skan * allocated from the heap. 807132718Skan */ 808132718Skan#define TSOH_STD_SIZE 128 809132718Skan 810132718Skan/* At most half the descriptors in the queue at any time will refer to 811132718Skan * a TSO header buffer, since they must always be followed by a 812132718Skan * payload descriptor referring to an mbuf. 813132718Skan */ 814132718Skan#define TSOH_COUNT(_txq_entries) ((_txq_entries) / 2u) 815132718Skan#define TSOH_PER_PAGE (PAGE_SIZE / TSOH_STD_SIZE) 816132718Skan#define TSOH_PAGE_COUNT(_txq_entries) \ 817132718Skan ((TSOH_COUNT(_txq_entries) + TSOH_PER_PAGE - 1) / TSOH_PER_PAGE) 818132718Skan 819132718Skanstatic int tso_init(struct sfxge_txq *txq) 820132718Skan{ 821132718Skan struct sfxge_softc *sc = txq->sc; 822132718Skan unsigned int tsoh_page_count = TSOH_PAGE_COUNT(sc->txq_entries); 823132718Skan int i, rc; 824132718Skan 825222082Sbenl /* Allocate TSO header buffers */ 826132718Skan txq->tsoh_buffer = malloc(tsoh_page_count * sizeof(txq->tsoh_buffer[0]), 827132718Skan M_SFXGE, M_WAITOK); 828132718Skan 829132718Skan for (i = 0; i < tsoh_page_count; i++) { 830132718Skan rc = sfxge_dma_alloc(sc, PAGE_SIZE, &txq->tsoh_buffer[i]); 831132718Skan if (rc != 0) 832132718Skan goto fail; 833132718Skan } 834132718Skan 835132718Skan return (0); 836132718Skan 837132718Skanfail: 838132718Skan while (i-- > 0) 839132718Skan sfxge_dma_free(&txq->tsoh_buffer[i]); 840132718Skan free(txq->tsoh_buffer, M_SFXGE); 841132718Skan txq->tsoh_buffer = NULL; 842132718Skan return (rc); 843132718Skan} 844132718Skan 845132718Skanstatic void tso_fini(struct sfxge_txq *txq) 846132718Skan{ 847132718Skan int i; 848132718Skan 849132718Skan if (txq->tsoh_buffer != NULL) { 850132718Skan for (i = 0; i < TSOH_PAGE_COUNT(txq->sc->txq_entries); i++) 851132718Skan sfxge_dma_free(&txq->tsoh_buffer[i]); 852132718Skan free(txq->tsoh_buffer, M_SFXGE); 853132718Skan } 854132718Skan} 855132718Skan 856132718Skanstatic void tso_start(struct sfxge_txq *txq, struct sfxge_tso_state *tso, 857132718Skan const bus_dma_segment_t *hdr_dma_seg, 858132718Skan struct mbuf *mbuf) 859132718Skan{ 860132718Skan struct ether_header *eh = mtod(mbuf, struct ether_header *); 861132718Skan const efx_nic_cfg_t *encp = efx_nic_cfg_get(txq->sc->enp); 862132718Skan const struct tcphdr *th; 863132718Skan struct tcphdr th_copy; 864132718Skan 865132718Skan tso->fw_assisted = txq->sc->tso_fw_assisted; 866132718Skan tso->mbuf = mbuf; 867132718Skan 868132718Skan /* Find network protocol and header */ 869132718Skan tso->protocol = eh->ether_type; 870132718Skan if (tso->protocol == htons(ETHERTYPE_VLAN)) { 871132718Skan struct ether_vlan_header *veh = 872132718Skan mtod(mbuf, struct ether_vlan_header *); 873132718Skan tso->protocol = veh->evl_proto; 874132718Skan tso->nh_off = sizeof(*veh); 875132718Skan } else { 876132718Skan tso->nh_off = sizeof(*eh); 877132718Skan } 878132718Skan 879132718Skan /* Find TCP header */ 880132718Skan if (tso->protocol == htons(ETHERTYPE_IP)) { 881132718Skan KASSERT(tso_iph(tso)->ip_p == IPPROTO_TCP, 882132718Skan ("TSO required on non-TCP packet")); 883132718Skan tso->tcph_off = tso->nh_off + 4 * tso_iph(tso)->ip_hl; 884132718Skan tso->packet_id = tso_iph(tso)->ip_id; 885132718Skan } else { 886132718Skan KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 887132718Skan ("TSO required on non-IP packet")); 888132718Skan KASSERT(tso_ip6h(tso)->ip6_nxt == IPPROTO_TCP, 889132718Skan ("TSO required on non-TCP packet")); 890132718Skan tso->tcph_off = tso->nh_off + sizeof(struct ip6_hdr); 891132718Skan tso->packet_id = 0; 892132718Skan } 893132718Skan if (tso->fw_assisted && 894132718Skan __predict_false(tso->tcph_off > 895132718Skan encp->enc_tx_tso_tcp_header_offset_limit)) { 896132718Skan tso->fw_assisted = 0; 897132718Skan } 898132718Skan 899132718Skan KASSERT(mbuf->m_len >= tso->tcph_off, 900132718Skan ("network header is fragmented in mbuf")); 901132718Skan /* We need TCP header including flags (window is the next) */ 902132718Skan if (mbuf->m_len < tso->tcph_off + offsetof(struct tcphdr, th_win)) { 903132718Skan m_copydata(tso->mbuf, tso->tcph_off, sizeof(th_copy), 904132718Skan (caddr_t)&th_copy); 905132718Skan th = &th_copy; 906132718Skan } else { 907169689Skan th = tso_tcph(tso); 908132718Skan } 909132718Skan 910132718Skan tso->header_len = tso->tcph_off + 4 * th->th_off; 911132718Skan tso->seg_size = mbuf->m_pkthdr.tso_segsz; 912132718Skan 913132718Skan tso->seqnum = ntohl(th->th_seq); 914132718Skan 915132718Skan /* These flags must not be duplicated */ 916132718Skan /* 917132718Skan * RST should not be duplicated as well, but FreeBSD kernel 918132718Skan * generates TSO packets with RST flag. So, do not assert 919132718Skan * its absence. 920132718Skan */ 921169689Skan KASSERT(!(th->th_flags & (TH_URG | TH_SYN)), 922132718Skan ("incompatible TCP flag 0x%x on TSO packet", 923132718Skan th->th_flags & (TH_URG | TH_SYN))); 924132718Skan 925132718Skan tso->out_len = mbuf->m_pkthdr.len - tso->header_len; 926132718Skan 927169689Skan if (tso->fw_assisted) { 928132718Skan if (hdr_dma_seg->ds_len >= tso->header_len) 929132718Skan efx_tx_qdesc_dma_create(txq->common, 930132718Skan hdr_dma_seg->ds_addr, 931132718Skan tso->header_len, 932132718Skan B_FALSE, 933132718Skan &tso->header_desc); 934132718Skan else 935169689Skan tso->fw_assisted = 0; 936132718Skan } 937132718Skan} 938132718Skan 939132718Skan/* 940132718Skan * tso_fill_packet_with_fragment - form descriptors for the current fragment 941132718Skan * 942132718Skan * Form descriptors for the current fragment, until we reach the end 943132718Skan * of fragment or end-of-packet. Return 0 on success, 1 if not enough 944132718Skan * space. 945132718Skan */ 946132718Skanstatic void tso_fill_packet_with_fragment(struct sfxge_txq *txq, 947132718Skan struct sfxge_tso_state *tso) 948132718Skan{ 949132718Skan efx_desc_t *desc; 950132718Skan int n; 951132718Skan 952169689Skan if (tso->in_len == 0 || tso->packet_space == 0) 953132718Skan return; 954132718Skan 955132718Skan KASSERT(tso->in_len > 0, ("TSO input length went negative")); 956132718Skan KASSERT(tso->packet_space > 0, ("TSO packet space went negative")); 957132718Skan 958132718Skan n = min(tso->in_len, tso->packet_space); 959132718Skan 960132718Skan tso->packet_space -= n; 961132718Skan tso->out_len -= n; 962132718Skan tso->in_len -= n; 963132718Skan 964132718Skan desc = &txq->pend_desc[txq->n_pend_desc++]; 965132718Skan efx_tx_qdesc_dma_create(txq->common, 966132718Skan tso->dma_addr, 967169689Skan n, 968132718Skan tso->out_len == 0 || tso->packet_space == 0, 969132718Skan desc); 970132718Skan 971132718Skan tso->dma_addr += n; 972132718Skan} 973132718Skan 974132718Skan/* Callback from bus_dmamap_load() for long TSO headers. */ 975132718Skanstatic void tso_map_long_header(void *dma_addr_ret, 976132718Skan bus_dma_segment_t *segs, int nseg, 977132718Skan int error) 978132718Skan{ 979132718Skan *(uint64_t *)dma_addr_ret = ((__predict_true(error == 0) && 980132718Skan __predict_true(nseg == 1)) ? 981169689Skan segs->ds_addr : 0); 982132718Skan} 983132718Skan 984132718Skan/* 985132718Skan * tso_start_new_packet - generate a new header and prepare for the new packet 986132718Skan * 987132718Skan * Generate a new header and prepare for the new packet. Return 0 on 988132718Skan * success, or an error code if failed to alloc header. 989132718Skan */ 990132718Skanstatic int tso_start_new_packet(struct sfxge_txq *txq, 991132718Skan struct sfxge_tso_state *tso, 992169689Skan unsigned int *idp) 993169689Skan{ 994169689Skan unsigned int id = *idp; 995169689Skan struct tcphdr *tsoh_th; 996169689Skan unsigned ip_length; 997169689Skan caddr_t header; 998169689Skan uint64_t dma_addr; 999169689Skan bus_dmamap_t map; 1000169689Skan efx_desc_t *desc; 1001169689Skan int rc; 1002169689Skan 1003169689Skan if (tso->fw_assisted) { 1004169689Skan uint8_t tcp_flags = tso_tcph(tso)->th_flags; 1005169689Skan 1006169689Skan if (tso->out_len > tso->seg_size) 1007169689Skan tcp_flags &= ~(TH_FIN | TH_PUSH); 1008169689Skan 1009169689Skan /* TSO option descriptor */ 1010169689Skan desc = &txq->pend_desc[txq->n_pend_desc++]; 1011169689Skan efx_tx_qdesc_tso_create(txq->common, 1012169689Skan tso->packet_id, 1013169689Skan tso->seqnum, 1014169689Skan tcp_flags, 1015169689Skan desc++); 1016169689Skan KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1017169689Skan id = (id + 1) & txq->ptr_mask; 1018169689Skan 1019169689Skan /* Header DMA descriptor */ 1020169689Skan *desc = tso->header_desc; 1021169689Skan txq->n_pend_desc++; 1022169689Skan KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1023169689Skan id = (id + 1) & txq->ptr_mask; 1024169689Skan 1025132718Skan tso->seqnum += tso->seg_size; 1026132718Skan } else { 1027132718Skan /* Allocate a DMA-mapped header buffer. */ 1028132718Skan if (__predict_true(tso->header_len <= TSOH_STD_SIZE)) { 1029132718Skan unsigned int page_index = (id / 2) / TSOH_PER_PAGE; 1030169689Skan unsigned int buf_index = (id / 2) % TSOH_PER_PAGE; 1031132718Skan 1032132718Skan header = (txq->tsoh_buffer[page_index].esm_base + 1033132718Skan buf_index * TSOH_STD_SIZE); 1034132718Skan dma_addr = (txq->tsoh_buffer[page_index].esm_addr + 1035132718Skan buf_index * TSOH_STD_SIZE); 1036132718Skan map = txq->tsoh_buffer[page_index].esm_map; 1037132718Skan 1038132718Skan KASSERT(txq->stmp[id].flags == 0, 1039132718Skan ("stmp flags are not 0")); 1040132718Skan } else { 1041132718Skan struct sfxge_tx_mapping *stmp = &txq->stmp[id]; 1042132718Skan 1043132718Skan /* We cannot use bus_dmamem_alloc() as that may sleep */ 1044132718Skan header = malloc(tso->header_len, M_SFXGE, M_NOWAIT); 1045132718Skan if (__predict_false(!header)) 1046132718Skan return (ENOMEM); 1047132718Skan rc = bus_dmamap_load(txq->packet_dma_tag, stmp->map, 1048132718Skan header, tso->header_len, 1049132718Skan tso_map_long_header, &dma_addr, 1050132718Skan BUS_DMA_NOWAIT); 1051132718Skan if (__predict_false(dma_addr == 0)) { 1052132718Skan if (rc == 0) { 1053132718Skan /* Succeeded but got >1 segment */ 1054169689Skan bus_dmamap_unload(txq->packet_dma_tag, 1055132718Skan stmp->map); 1056132718Skan rc = EINVAL; 1057132718Skan } 1058132718Skan free(header, M_SFXGE); 1059132718Skan return (rc); 1060132718Skan } 1061132718Skan map = stmp->map; 1062132718Skan 1063132718Skan txq->tso_long_headers++; 1064132718Skan stmp->u.heap_buf = header; 1065132718Skan stmp->flags = TX_BUF_UNMAP; 1066132718Skan } 1067132718Skan 1068132718Skan tsoh_th = (struct tcphdr *)(header + tso->tcph_off); 1069132718Skan 1070169689Skan /* Copy and update the headers. */ 1071132718Skan m_copydata(tso->mbuf, 0, tso->header_len, header); 1072132718Skan 1073132718Skan tsoh_th->th_seq = htonl(tso->seqnum); 1074132718Skan tso->seqnum += tso->seg_size; 1075132718Skan if (tso->out_len > tso->seg_size) { 1076132718Skan /* This packet will not finish the TSO burst. */ 1077132718Skan ip_length = tso->header_len - tso->nh_off + tso->seg_size; 1078132718Skan tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH); 1079132718Skan } else { 1080132718Skan /* This packet will be the last in the TSO burst. */ 1081132718Skan ip_length = tso->header_len - tso->nh_off + tso->out_len; 1082132718Skan } 1083132718Skan 1084132718Skan if (tso->protocol == htons(ETHERTYPE_IP)) { 1085132718Skan struct ip *tsoh_iph = (struct ip *)(header + tso->nh_off); 1086169689Skan tsoh_iph->ip_len = htons(ip_length); 1087132718Skan /* XXX We should increment ip_id, but FreeBSD doesn't 1088132718Skan * currently allocate extra IDs for multiple segments. 1089132718Skan */ 1090132718Skan } else { 1091132718Skan struct ip6_hdr *tsoh_iph = 1092132718Skan (struct ip6_hdr *)(header + tso->nh_off); 1093132718Skan tsoh_iph->ip6_plen = htons(ip_length - sizeof(*tsoh_iph)); 1094132718Skan } 1095132718Skan 1096132718Skan /* Make the header visible to the hardware. */ 1097132718Skan bus_dmamap_sync(txq->packet_dma_tag, map, BUS_DMASYNC_PREWRITE); 1098132718Skan 1099132718Skan /* Form a descriptor for this header. */ 1100132718Skan desc = &txq->pend_desc[txq->n_pend_desc++]; 1101132718Skan efx_tx_qdesc_dma_create(txq->common, 1102132718Skan dma_addr, 1103132718Skan tso->header_len, 1104132718Skan 0, 1105132718Skan desc); 1106132718Skan id = (id + 1) & txq->ptr_mask; 1107132718Skan } 1108132718Skan tso->packet_space = tso->seg_size; 1109132718Skan txq->tso_packets++; 1110132718Skan *idp = id; 1111132718Skan 1112132718Skan return (0); 1113132718Skan} 1114132718Skan 1115132718Skanstatic int 1116132718Skansfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 1117132718Skan const bus_dma_segment_t *dma_seg, int n_dma_seg, 1118132718Skan int vlan_tagged) 1119132718Skan{ 1120132718Skan struct sfxge_tso_state tso; 1121132718Skan unsigned int id; 1122169689Skan unsigned skipped = 0; 1123169689Skan 1124132718Skan tso_start(txq, &tso, dma_seg, mbuf); 1125132718Skan 1126169689Skan while (dma_seg->ds_len + skipped <= tso.header_len) { 1127132718Skan skipped += dma_seg->ds_len; 1128132718Skan --n_dma_seg; 1129132718Skan KASSERT(n_dma_seg, ("no payload found in TSO packet")); 1130132718Skan ++dma_seg; 1131132718Skan } 1132132718Skan tso.in_len = dma_seg->ds_len - (tso.header_len - skipped); 1133169689Skan tso.dma_addr = dma_seg->ds_addr + (tso.header_len - skipped); 1134169689Skan 1135169689Skan id = (txq->added + vlan_tagged) & txq->ptr_mask; 1136169689Skan if (__predict_false(tso_start_new_packet(txq, &tso, &id))) 1137169689Skan return (-1); 1138169689Skan 1139169689Skan while (1) { 1140132718Skan tso_fill_packet_with_fragment(txq, &tso); 1141132718Skan /* Exactly one DMA descriptor is added */ 1142132718Skan KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1143132718Skan id = (id + 1) & txq->ptr_mask; 1144132718Skan 1145132718Skan /* Move onto the next fragment? */ 1146132718Skan if (tso.in_len == 0) { 1147132718Skan --n_dma_seg; 1148132718Skan if (n_dma_seg == 0) 1149132718Skan break; 1150132718Skan ++dma_seg; 1151132718Skan tso.in_len = dma_seg->ds_len; 1152132718Skan tso.dma_addr = dma_seg->ds_addr; 1153132718Skan } 1154132718Skan 1155132718Skan /* End of packet? */ 1156132718Skan if (tso.packet_space == 0) { 1157132718Skan /* If the queue is now full due to tiny MSS, 1158132718Skan * or we can't create another header, discard 1159132718Skan * the remainder of the input mbuf but do not 1160132718Skan * roll back the work we have done. 1161132718Skan */ 1162132718Skan if (txq->n_pend_desc + tso.fw_assisted + 1163132718Skan 1 /* header */ + n_dma_seg > 1164132718Skan txq->max_pkt_desc) { 1165132718Skan txq->tso_pdrop_too_many++; 1166132718Skan break; 1167169689Skan } 1168132718Skan if (__predict_false(tso_start_new_packet(txq, &tso, 1169132718Skan &id))) { 1170132718Skan txq->tso_pdrop_no_rsrc++; 1171132718Skan break; 1172132718Skan } 1173132718Skan } 1174132718Skan } 1175132718Skan 1176132718Skan txq->tso_bursts++; 1177132718Skan return (id); 1178132718Skan} 1179132718Skan 1180132718Skanstatic void 1181132718Skansfxge_tx_qunblock(struct sfxge_txq *txq) 1182132718Skan{ 1183132718Skan struct sfxge_softc *sc; 1184132718Skan struct sfxge_evq *evq; 1185132718Skan 1186132718Skan sc = txq->sc; 1187132718Skan evq = sc->evq[txq->evq_index]; 1188132718Skan 1189132718Skan SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 1190132718Skan 1191132718Skan if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) 1192132718Skan return; 1193132718Skan 1194132718Skan SFXGE_TXQ_LOCK(txq); 1195132718Skan 1196132718Skan if (txq->blocked) { 1197132718Skan unsigned int level; 1198132718Skan 1199132718Skan level = txq->added - txq->completed; 1200132718Skan if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) { 1201132718Skan /* reaped must be in sync with blocked */ 1202132718Skan sfxge_tx_qreap(txq); 1203169689Skan txq->blocked = 0; 1204132718Skan } 1205132718Skan } 1206132718Skan 1207132718Skan sfxge_tx_qdpl_service(txq); 1208132718Skan /* note: lock has been dropped */ 1209132718Skan} 1210132718Skan 1211132718Skanvoid 1212132718Skansfxge_tx_qflush_done(struct sfxge_txq *txq) 1213132718Skan{ 1214132718Skan 1215132718Skan txq->flush_state = SFXGE_FLUSH_DONE; 1216132718Skan} 1217132718Skan 1218132718Skanstatic void 1219132718Skansfxge_tx_qstop(struct sfxge_softc *sc, unsigned int index) 1220132718Skan{ 1221132718Skan struct sfxge_txq *txq; 1222132718Skan struct sfxge_evq *evq; 1223132718Skan unsigned int count; 1224132718Skan 1225132718Skan SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 1226132718Skan 1227132718Skan txq = sc->txq[index]; 1228132718Skan evq = sc->evq[txq->evq_index]; 1229132718Skan 1230132718Skan SFXGE_EVQ_LOCK(evq); 1231132718Skan SFXGE_TXQ_LOCK(txq); 1232132718Skan 1233132718Skan KASSERT(txq->init_state == SFXGE_TXQ_STARTED, 1234132718Skan ("txq->init_state != SFXGE_TXQ_STARTED")); 1235132718Skan 1236132718Skan txq->init_state = SFXGE_TXQ_INITIALIZED; 1237132718Skan 1238132718Skan if (txq->flush_state != SFXGE_FLUSH_DONE) { 1239132718Skan txq->flush_state = SFXGE_FLUSH_PENDING; 1240132718Skan 1241132718Skan SFXGE_EVQ_UNLOCK(evq); 1242132718Skan SFXGE_TXQ_UNLOCK(txq); 1243132718Skan 1244132718Skan /* Flush the transmit queue. */ 1245132718Skan if (efx_tx_qflush(txq->common) != 0) { 1246132718Skan log(LOG_ERR, "%s: Flushing Tx queue %u failed\n", 1247132718Skan device_get_nameunit(sc->dev), index); 1248132718Skan txq->flush_state = SFXGE_FLUSH_DONE; 1249132718Skan } else { 1250132718Skan count = 0; 1251132718Skan do { 1252132718Skan /* Spin for 100ms. */ 1253132718Skan DELAY(100000); 1254132718Skan if (txq->flush_state != SFXGE_FLUSH_PENDING) 1255132718Skan break; 1256132718Skan } while (++count < 20); 1257132718Skan } 1258132718Skan SFXGE_EVQ_LOCK(evq); 1259132718Skan SFXGE_TXQ_LOCK(txq); 1260132718Skan 1261132718Skan KASSERT(txq->flush_state != SFXGE_FLUSH_FAILED, 1262132718Skan ("txq->flush_state == SFXGE_FLUSH_FAILED")); 1263132718Skan 1264132718Skan if (txq->flush_state != SFXGE_FLUSH_DONE) { 1265132718Skan /* Flush timeout */ 1266132718Skan log(LOG_ERR, "%s: Cannot flush Tx queue %u\n", 1267132718Skan device_get_nameunit(sc->dev), index); 1268132718Skan txq->flush_state = SFXGE_FLUSH_DONE; 1269132718Skan } 1270132718Skan } 1271132718Skan 1272132718Skan txq->blocked = 0; 1273132718Skan txq->pending = txq->added; 1274132718Skan 1275132718Skan sfxge_tx_qcomplete(txq, evq); 1276132718Skan KASSERT(txq->completed == txq->added, 1277132718Skan ("txq->completed != txq->added")); 1278132718Skan 1279132718Skan sfxge_tx_qreap(txq); 1280132718Skan KASSERT(txq->reaped == txq->completed, 1281132718Skan ("txq->reaped != txq->completed")); 1282132718Skan 1283132718Skan txq->added = 0; 1284132718Skan txq->pending = 0; 1285132718Skan txq->completed = 0; 1286132718Skan txq->reaped = 0; 1287132718Skan 1288132718Skan /* Destroy the common code transmit queue. */ 1289132718Skan efx_tx_qdestroy(txq->common); 1290132718Skan txq->common = NULL; 1291132718Skan 1292132718Skan efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1293132718Skan EFX_TXQ_NBUFS(sc->txq_entries)); 1294132718Skan 1295132718Skan SFXGE_EVQ_UNLOCK(evq); 1296132718Skan SFXGE_TXQ_UNLOCK(txq); 1297132718Skan} 1298132718Skan 1299132718Skanstatic int 1300132718Skansfxge_tx_qstart(struct sfxge_softc *sc, unsigned int index) 1301{ 1302 struct sfxge_txq *txq; 1303 efsys_mem_t *esmp; 1304 uint16_t flags; 1305 struct sfxge_evq *evq; 1306 unsigned int desc_index; 1307 int rc; 1308 1309 SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 1310 1311 txq = sc->txq[index]; 1312 esmp = &txq->mem; 1313 evq = sc->evq[txq->evq_index]; 1314 1315 KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1316 ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1317 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 1318 ("evq->init_state != SFXGE_EVQ_STARTED")); 1319 1320 /* Program the buffer table. */ 1321 if ((rc = efx_sram_buf_tbl_set(sc->enp, txq->buf_base_id, esmp, 1322 EFX_TXQ_NBUFS(sc->txq_entries))) != 0) 1323 return (rc); 1324 1325 /* Determine the kind of queue we are creating. */ 1326 switch (txq->type) { 1327 case SFXGE_TXQ_NON_CKSUM: 1328 flags = 0; 1329 break; 1330 case SFXGE_TXQ_IP_CKSUM: 1331 flags = EFX_CKSUM_IPV4; 1332 break; 1333 case SFXGE_TXQ_IP_TCP_UDP_CKSUM: 1334 flags = EFX_CKSUM_IPV4 | EFX_CKSUM_TCPUDP; 1335 break; 1336 default: 1337 KASSERT(0, ("Impossible TX queue")); 1338 flags = 0; 1339 break; 1340 } 1341 1342 /* Create the common code transmit queue. */ 1343 if ((rc = efx_tx_qcreate(sc->enp, index, txq->type, esmp, 1344 sc->txq_entries, txq->buf_base_id, flags, evq->common, 1345 &txq->common, &desc_index)) != 0) 1346 goto fail; 1347 1348 /* Initialise queue descriptor indexes */ 1349 txq->added = txq->pending = txq->completed = txq->reaped = desc_index; 1350 1351 SFXGE_TXQ_LOCK(txq); 1352 1353 /* Enable the transmit queue. */ 1354 efx_tx_qenable(txq->common); 1355 1356 txq->init_state = SFXGE_TXQ_STARTED; 1357 txq->flush_state = SFXGE_FLUSH_REQUIRED; 1358 1359 SFXGE_TXQ_UNLOCK(txq); 1360 1361 return (0); 1362 1363fail: 1364 efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1365 EFX_TXQ_NBUFS(sc->txq_entries)); 1366 return (rc); 1367} 1368 1369void 1370sfxge_tx_stop(struct sfxge_softc *sc) 1371{ 1372 int index; 1373 1374 index = sc->txq_count; 1375 while (--index >= 0) 1376 sfxge_tx_qstop(sc, index); 1377 1378 /* Tear down the transmit module */ 1379 efx_tx_fini(sc->enp); 1380} 1381 1382int 1383sfxge_tx_start(struct sfxge_softc *sc) 1384{ 1385 int index; 1386 int rc; 1387 1388 /* Initialize the common code transmit module. */ 1389 if ((rc = efx_tx_init(sc->enp)) != 0) 1390 return (rc); 1391 1392 for (index = 0; index < sc->txq_count; index++) { 1393 if ((rc = sfxge_tx_qstart(sc, index)) != 0) 1394 goto fail; 1395 } 1396 1397 return (0); 1398 1399fail: 1400 while (--index >= 0) 1401 sfxge_tx_qstop(sc, index); 1402 1403 efx_tx_fini(sc->enp); 1404 1405 return (rc); 1406} 1407 1408static int 1409sfxge_txq_stat_init(struct sfxge_txq *txq, struct sysctl_oid *txq_node) 1410{ 1411 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(txq->sc->dev); 1412 struct sysctl_oid *stat_node; 1413 unsigned int id; 1414 1415 stat_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 1416 "stats", CTLFLAG_RD, NULL, 1417 "Tx queue statistics"); 1418 if (stat_node == NULL) 1419 return (ENOMEM); 1420 1421 for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1422 SYSCTL_ADD_ULONG( 1423 ctx, SYSCTL_CHILDREN(stat_node), OID_AUTO, 1424 sfxge_tx_stats[id].name, CTLFLAG_RD | CTLFLAG_STATS, 1425 (unsigned long *)((caddr_t)txq + sfxge_tx_stats[id].offset), 1426 ""); 1427 } 1428 1429 return (0); 1430} 1431 1432/** 1433 * Destroy a transmit queue. 1434 */ 1435static void 1436sfxge_tx_qfini(struct sfxge_softc *sc, unsigned int index) 1437{ 1438 struct sfxge_txq *txq; 1439 unsigned int nmaps; 1440 1441 txq = sc->txq[index]; 1442 1443 KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1444 ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1445 1446 if (txq->type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) 1447 tso_fini(txq); 1448 1449 /* Free the context arrays. */ 1450 free(txq->pend_desc, M_SFXGE); 1451 nmaps = sc->txq_entries; 1452 while (nmaps-- != 0) 1453 bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1454 free(txq->stmp, M_SFXGE); 1455 1456 /* Release DMA memory mapping. */ 1457 sfxge_dma_free(&txq->mem); 1458 1459 sc->txq[index] = NULL; 1460 1461 SFXGE_TXQ_LOCK_DESTROY(txq); 1462 1463 free(txq, M_SFXGE); 1464} 1465 1466/* 1467 * Estimate maximum number of Tx descriptors required for TSO packet. 1468 * With minimum MSS and maximum mbuf length we might need more (even 1469 * than a ring-ful of descriptors), but this should not happen in 1470 * practice except due to deliberate attack. In that case we will 1471 * truncate the output at a packet boundary. 1472 */ 1473static unsigned int 1474sfxge_tx_max_pkt_desc(const struct sfxge_softc *sc, enum sfxge_txq_type type) 1475{ 1476 /* One descriptor for every input fragment */ 1477 unsigned int max_descs = SFXGE_TX_MAPPING_MAX_SEG; 1478 1479 /* VLAN tagging Tx option descriptor may be required */ 1480 if (efx_nic_cfg_get(sc->enp)->enc_hw_tx_insert_vlan_enabled) 1481 max_descs++; 1482 1483 if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) { 1484 /* 1485 * Plus header and payload descriptor for each output segment. 1486 * Minus one since header fragment is already counted. 1487 */ 1488 max_descs += SFXGE_TSO_MAX_SEGS * 2 - 1; 1489 1490 /* FW assisted TSO requires one more descriptor per segment */ 1491 if (sc->tso_fw_assisted) 1492 max_descs += SFXGE_TSO_MAX_SEGS; 1493 } 1494 1495 return (max_descs); 1496} 1497 1498static int 1499sfxge_tx_qinit(struct sfxge_softc *sc, unsigned int txq_index, 1500 enum sfxge_txq_type type, unsigned int evq_index) 1501{ 1502 char name[16]; 1503 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1504 struct sysctl_oid *txq_node; 1505 struct sfxge_txq *txq; 1506 struct sfxge_evq *evq; 1507 struct sfxge_tx_dpl *stdp; 1508 struct sysctl_oid *dpl_node; 1509 efsys_mem_t *esmp; 1510 unsigned int nmaps; 1511 int rc; 1512 1513 txq = malloc(sizeof(struct sfxge_txq), M_SFXGE, M_ZERO | M_WAITOK); 1514 txq->sc = sc; 1515 txq->entries = sc->txq_entries; 1516 txq->ptr_mask = txq->entries - 1; 1517 1518 sc->txq[txq_index] = txq; 1519 esmp = &txq->mem; 1520 1521 evq = sc->evq[evq_index]; 1522 1523 /* Allocate and zero DMA space for the descriptor ring. */ 1524 if ((rc = sfxge_dma_alloc(sc, EFX_TXQ_SIZE(sc->txq_entries), esmp)) != 0) 1525 return (rc); 1526 1527 /* Allocate buffer table entries. */ 1528 sfxge_sram_buf_tbl_alloc(sc, EFX_TXQ_NBUFS(sc->txq_entries), 1529 &txq->buf_base_id); 1530 1531 /* Create a DMA tag for packet mappings. */ 1532 if (bus_dma_tag_create(sc->parent_dma_tag, 1, 0x1000, 1533 MIN(0x3FFFFFFFFFFFUL, BUS_SPACE_MAXADDR), BUS_SPACE_MAXADDR, NULL, 1534 NULL, 0x11000, SFXGE_TX_MAPPING_MAX_SEG, 0x1000, 0, NULL, NULL, 1535 &txq->packet_dma_tag) != 0) { 1536 device_printf(sc->dev, "Couldn't allocate txq DMA tag\n"); 1537 rc = ENOMEM; 1538 goto fail; 1539 } 1540 1541 /* Allocate pending descriptor array for batching writes. */ 1542 txq->pend_desc = malloc(sizeof(efx_desc_t) * sc->txq_entries, 1543 M_SFXGE, M_ZERO | M_WAITOK); 1544 1545 /* Allocate and initialise mbuf DMA mapping array. */ 1546 txq->stmp = malloc(sizeof(struct sfxge_tx_mapping) * sc->txq_entries, 1547 M_SFXGE, M_ZERO | M_WAITOK); 1548 for (nmaps = 0; nmaps < sc->txq_entries; nmaps++) { 1549 rc = bus_dmamap_create(txq->packet_dma_tag, 0, 1550 &txq->stmp[nmaps].map); 1551 if (rc != 0) 1552 goto fail2; 1553 } 1554 1555 snprintf(name, sizeof(name), "%u", txq_index); 1556 txq_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->txqs_node), 1557 OID_AUTO, name, CTLFLAG_RD, NULL, ""); 1558 if (txq_node == NULL) { 1559 rc = ENOMEM; 1560 goto fail_txq_node; 1561 } 1562 1563 if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM && 1564 (rc = tso_init(txq)) != 0) 1565 goto fail3; 1566 1567 if (sfxge_tx_dpl_get_max <= 0) { 1568 log(LOG_ERR, "%s=%d must be greater than 0", 1569 SFXGE_PARAM_TX_DPL_GET_MAX, sfxge_tx_dpl_get_max); 1570 rc = EINVAL; 1571 goto fail_tx_dpl_get_max; 1572 } 1573 if (sfxge_tx_dpl_get_non_tcp_max <= 0) { 1574 log(LOG_ERR, "%s=%d must be greater than 0", 1575 SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, 1576 sfxge_tx_dpl_get_non_tcp_max); 1577 rc = EINVAL; 1578 goto fail_tx_dpl_get_max; 1579 } 1580 if (sfxge_tx_dpl_put_max < 0) { 1581 log(LOG_ERR, "%s=%d must be greater or equal to 0", 1582 SFXGE_PARAM_TX_DPL_PUT_MAX, sfxge_tx_dpl_put_max); 1583 rc = EINVAL; 1584 goto fail_tx_dpl_put_max; 1585 } 1586 1587 /* Initialize the deferred packet list. */ 1588 stdp = &txq->dpl; 1589 stdp->std_put_max = sfxge_tx_dpl_put_max; 1590 stdp->std_get_max = sfxge_tx_dpl_get_max; 1591 stdp->std_get_non_tcp_max = sfxge_tx_dpl_get_non_tcp_max; 1592 stdp->std_getp = &stdp->std_get; 1593 1594 SFXGE_TXQ_LOCK_INIT(txq, device_get_nameunit(sc->dev), txq_index); 1595 1596 dpl_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 1597 "dpl", CTLFLAG_RD, NULL, 1598 "Deferred packet list statistics"); 1599 if (dpl_node == NULL) { 1600 rc = ENOMEM; 1601 goto fail_dpl_node; 1602 } 1603 1604 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1605 "get_count", CTLFLAG_RD | CTLFLAG_STATS, 1606 &stdp->std_get_count, 0, ""); 1607 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1608 "get_non_tcp_count", CTLFLAG_RD | CTLFLAG_STATS, 1609 &stdp->std_get_non_tcp_count, 0, ""); 1610 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1611 "get_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 1612 &stdp->std_get_hiwat, 0, ""); 1613 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1614 "put_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 1615 &stdp->std_put_hiwat, 0, ""); 1616 1617 rc = sfxge_txq_stat_init(txq, txq_node); 1618 if (rc != 0) 1619 goto fail_txq_stat_init; 1620 1621 txq->type = type; 1622 txq->evq_index = evq_index; 1623 txq->txq_index = txq_index; 1624 txq->init_state = SFXGE_TXQ_INITIALIZED; 1625 txq->hw_vlan_tci = 0; 1626 1627 txq->max_pkt_desc = sfxge_tx_max_pkt_desc(sc, type); 1628 1629 return (0); 1630 1631fail_txq_stat_init: 1632fail_dpl_node: 1633fail_tx_dpl_put_max: 1634fail_tx_dpl_get_max: 1635fail3: 1636fail_txq_node: 1637 free(txq->pend_desc, M_SFXGE); 1638fail2: 1639 while (nmaps-- != 0) 1640 bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1641 free(txq->stmp, M_SFXGE); 1642 bus_dma_tag_destroy(txq->packet_dma_tag); 1643 1644fail: 1645 sfxge_dma_free(esmp); 1646 1647 return (rc); 1648} 1649 1650static int 1651sfxge_tx_stat_handler(SYSCTL_HANDLER_ARGS) 1652{ 1653 struct sfxge_softc *sc = arg1; 1654 unsigned int id = arg2; 1655 unsigned long sum; 1656 unsigned int index; 1657 1658 /* Sum across all TX queues */ 1659 sum = 0; 1660 for (index = 0; index < sc->txq_count; index++) 1661 sum += *(unsigned long *)((caddr_t)sc->txq[index] + 1662 sfxge_tx_stats[id].offset); 1663 1664 return (SYSCTL_OUT(req, &sum, sizeof(sum))); 1665} 1666 1667static void 1668sfxge_tx_stat_init(struct sfxge_softc *sc) 1669{ 1670 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1671 struct sysctl_oid_list *stat_list; 1672 unsigned int id; 1673 1674 stat_list = SYSCTL_CHILDREN(sc->stats_node); 1675 1676 for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1677 SYSCTL_ADD_PROC( 1678 ctx, stat_list, 1679 OID_AUTO, sfxge_tx_stats[id].name, 1680 CTLTYPE_ULONG|CTLFLAG_RD, 1681 sc, id, sfxge_tx_stat_handler, "LU", 1682 ""); 1683 } 1684} 1685 1686void 1687sfxge_tx_fini(struct sfxge_softc *sc) 1688{ 1689 int index; 1690 1691 index = sc->txq_count; 1692 while (--index >= 0) 1693 sfxge_tx_qfini(sc, index); 1694 1695 sc->txq_count = 0; 1696} 1697 1698 1699int 1700sfxge_tx_init(struct sfxge_softc *sc) 1701{ 1702 const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp); 1703 struct sfxge_intr *intr; 1704 int index; 1705 int rc; 1706 1707 intr = &sc->intr; 1708 1709 KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 1710 ("intr->state != SFXGE_INTR_INITIALIZED")); 1711 1712 sc->txq_count = SFXGE_TXQ_NTYPES - 1 + sc->intr.n_alloc; 1713 1714 sc->tso_fw_assisted = sfxge_tso_fw_assisted; 1715 if (sc->tso_fw_assisted) 1716 sc->tso_fw_assisted = 1717 (encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO) && 1718 (encp->enc_fw_assisted_tso_enabled); 1719 1720 sc->txqs_node = SYSCTL_ADD_NODE( 1721 device_get_sysctl_ctx(sc->dev), 1722 SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), 1723 OID_AUTO, "txq", CTLFLAG_RD, NULL, "Tx queues"); 1724 if (sc->txqs_node == NULL) { 1725 rc = ENOMEM; 1726 goto fail_txq_node; 1727 } 1728 1729 /* Initialize the transmit queues */ 1730 if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NON_CKSUM, 1731 SFXGE_TXQ_NON_CKSUM, 0)) != 0) 1732 goto fail; 1733 1734 if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_CKSUM, 1735 SFXGE_TXQ_IP_CKSUM, 0)) != 0) 1736 goto fail2; 1737 1738 for (index = 0; 1739 index < sc->txq_count - SFXGE_TXQ_NTYPES + 1; 1740 index++) { 1741 if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NTYPES - 1 + index, 1742 SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0) 1743 goto fail3; 1744 } 1745 1746 sfxge_tx_stat_init(sc); 1747 1748 return (0); 1749 1750fail3: 1751 while (--index >= 0) 1752 sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1753 1754 sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM); 1755 1756fail2: 1757 sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM); 1758 1759fail: 1760fail_txq_node: 1761 sc->txq_count = 0; 1762 return (rc); 1763} 1764