1227569Sphilip/*- 2300607Sarybchik * Copyright (c) 2010-2016 Solarflare Communications Inc. 3227569Sphilip * All rights reserved. 4227569Sphilip * 5227569Sphilip * This software was developed in part by Philip Paeps under contract for 6227569Sphilip * Solarflare Communications, Inc. 7227569Sphilip * 8227569Sphilip * Redistribution and use in source and binary forms, with or without 9283514Sarybchik * modification, are permitted provided that the following conditions are met: 10227569Sphilip * 11283514Sarybchik * 1. Redistributions of source code must retain the above copyright notice, 12283514Sarybchik * this list of conditions and the following disclaimer. 13283514Sarybchik * 2. Redistributions in binary form must reproduce the above copyright notice, 14283514Sarybchik * this list of conditions and the following disclaimer in the documentation 15283514Sarybchik * and/or other materials provided with the distribution. 16283514Sarybchik * 17283514Sarybchik * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18283514Sarybchik * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19283514Sarybchik * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20283514Sarybchik * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 21283514Sarybchik * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22283514Sarybchik * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23283514Sarybchik * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24283514Sarybchik * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25283514Sarybchik * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26283514Sarybchik * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 27283514Sarybchik * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28283514Sarybchik * 29283514Sarybchik * The views and conclusions contained in the software and documentation are 30283514Sarybchik * those of the authors and should not be interpreted as representing official 31283514Sarybchik * policies, either expressed or implied, of the FreeBSD Project. 32227569Sphilip */ 33227569Sphilip 34264461Sgnn/* Theory of operation: 35264461Sgnn * 36342455Sarybchik * Tx queues allocation and mapping on Siena 37264461Sgnn * 38264461Sgnn * One Tx queue with enabled checksum offload is allocated per Rx channel 39264461Sgnn * (event queue). Also 2 Tx queues (one without checksum offload and one 40264461Sgnn * with IP checksum offload only) are allocated and bound to event queue 0. 41264461Sgnn * sfxge_txq_type is used as Tx queue label. 42264461Sgnn * 43264461Sgnn * So, event queue plus label mapping to Tx queue index is: 44264461Sgnn * if event queue index is 0, TxQ-index = TxQ-label * [0..SFXGE_TXQ_NTYPES) 45264461Sgnn * else TxQ-index = SFXGE_TXQ_NTYPES + EvQ-index - 1 46264461Sgnn * See sfxge_get_txq_by_label() sfxge_ev.c 47342455Sarybchik * 48342455Sarybchik * Tx queue allocation and mapping on EF10 49342455Sarybchik * 50342455Sarybchik * One Tx queue with enabled checksum offload is allocated per Rx 51342455Sarybchik * channel (event queue). Checksum offload on all Tx queues is enabled or 52342455Sarybchik * disabled dynamically by inserting option descriptors, so the additional 53342455Sarybchik * queues used on Siena are not required. 54342455Sarybchik * 55342455Sarybchik * TxQ label is always set to zero on EF10 hardware. 56342455Sarybchik * So, event queue to Tx queue mapping is simple: 57342455Sarybchik * TxQ-index = EvQ-index 58264461Sgnn */ 59264461Sgnn 60227569Sphilip#include <sys/cdefs.h> 61227569Sphilip__FBSDID("$FreeBSD: stable/11/sys/dev/sfxge/sfxge_tx.c 342455 2018-12-25 07:39:34Z arybchik $"); 62227569Sphilip 63301494Sarybchik#include "opt_rss.h" 64301494Sarybchik 65295126Sglebius#include <sys/param.h> 66295126Sglebius#include <sys/malloc.h> 67227569Sphilip#include <sys/mbuf.h> 68227569Sphilip#include <sys/smp.h> 69227569Sphilip#include <sys/socket.h> 70227569Sphilip#include <sys/sysctl.h> 71272331Sgnn#include <sys/syslog.h> 72294077Sarybchik#include <sys/limits.h> 73227569Sphilip 74227569Sphilip#include <net/bpf.h> 75227569Sphilip#include <net/ethernet.h> 76227569Sphilip#include <net/if.h> 77227569Sphilip#include <net/if_vlan_var.h> 78227569Sphilip 79227569Sphilip#include <netinet/in.h> 80227569Sphilip#include <netinet/ip.h> 81227569Sphilip#include <netinet/ip6.h> 82227569Sphilip#include <netinet/tcp.h> 83227569Sphilip 84301494Sarybchik#ifdef RSS 85301494Sarybchik#include <net/rss_config.h> 86301494Sarybchik#endif 87301494Sarybchik 88227569Sphilip#include "common/efx.h" 89227569Sphilip 90227569Sphilip#include "sfxge.h" 91227569Sphilip#include "sfxge_tx.h" 92227569Sphilip 93227569Sphilip 94272331Sgnn#define SFXGE_PARAM_TX_DPL_GET_MAX SFXGE_PARAM(tx_dpl_get_max) 95272331Sgnnstatic int sfxge_tx_dpl_get_max = SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT; 96272331SgnnTUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_MAX, &sfxge_tx_dpl_get_max); 97272331SgnnSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_max, CTLFLAG_RDTUN, 98272331Sgnn &sfxge_tx_dpl_get_max, 0, 99277895Sarybchik "Maximum number of any packets in deferred packet get-list"); 100272331Sgnn 101277895Sarybchik#define SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX \ 102277895Sarybchik SFXGE_PARAM(tx_dpl_get_non_tcp_max) 103277895Sarybchikstatic int sfxge_tx_dpl_get_non_tcp_max = 104277895Sarybchik SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT; 105277895SarybchikTUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, &sfxge_tx_dpl_get_non_tcp_max); 106277895SarybchikSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_non_tcp_max, CTLFLAG_RDTUN, 107277895Sarybchik &sfxge_tx_dpl_get_non_tcp_max, 0, 108277895Sarybchik "Maximum number of non-TCP packets in deferred packet get-list"); 109277895Sarybchik 110272331Sgnn#define SFXGE_PARAM_TX_DPL_PUT_MAX SFXGE_PARAM(tx_dpl_put_max) 111272331Sgnnstatic int sfxge_tx_dpl_put_max = SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT; 112272331SgnnTUNABLE_INT(SFXGE_PARAM_TX_DPL_PUT_MAX, &sfxge_tx_dpl_put_max); 113272331SgnnSYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_put_max, CTLFLAG_RDTUN, 114272331Sgnn &sfxge_tx_dpl_put_max, 0, 115277895Sarybchik "Maximum number of any packets in deferred packet put-list"); 116272331Sgnn 117283514Sarybchik#define SFXGE_PARAM_TSO_FW_ASSISTED SFXGE_PARAM(tso_fw_assisted) 118294077Sarybchikstatic int sfxge_tso_fw_assisted = (SFXGE_FATSOV1 | SFXGE_FATSOV2); 119283514SarybchikTUNABLE_INT(SFXGE_PARAM_TSO_FW_ASSISTED, &sfxge_tso_fw_assisted); 120283514SarybchikSYSCTL_INT(_hw_sfxge, OID_AUTO, tso_fw_assisted, CTLFLAG_RDTUN, 121283514Sarybchik &sfxge_tso_fw_assisted, 0, 122294077Sarybchik "Bitmask of FW-assisted TSO allowed to use if supported by NIC firmware"); 123272331Sgnn 124283514Sarybchik 125280377Sarybchikstatic const struct { 126280377Sarybchik const char *name; 127280377Sarybchik size_t offset; 128280377Sarybchik} sfxge_tx_stats[] = { 129280377Sarybchik#define SFXGE_TX_STAT(name, member) \ 130280377Sarybchik { #name, offsetof(struct sfxge_txq, member) } 131280377Sarybchik SFXGE_TX_STAT(tso_bursts, tso_bursts), 132280377Sarybchik SFXGE_TX_STAT(tso_packets, tso_packets), 133280377Sarybchik SFXGE_TX_STAT(tso_long_headers, tso_long_headers), 134280377Sarybchik SFXGE_TX_STAT(tso_pdrop_too_many, tso_pdrop_too_many), 135280377Sarybchik SFXGE_TX_STAT(tso_pdrop_no_rsrc, tso_pdrop_no_rsrc), 136280377Sarybchik SFXGE_TX_STAT(tx_collapses, collapses), 137280377Sarybchik SFXGE_TX_STAT(tx_drops, drops), 138280377Sarybchik SFXGE_TX_STAT(tx_get_overflow, get_overflow), 139280377Sarybchik SFXGE_TX_STAT(tx_get_non_tcp_overflow, get_non_tcp_overflow), 140280377Sarybchik SFXGE_TX_STAT(tx_put_overflow, put_overflow), 141280377Sarybchik SFXGE_TX_STAT(tx_netdown_drops, netdown_drops), 142280377Sarybchik}; 143280377Sarybchik 144280377Sarybchik 145227569Sphilip/* Forward declarations. */ 146278837Sarybchikstatic void sfxge_tx_qdpl_service(struct sfxge_txq *txq); 147227569Sphilipstatic void sfxge_tx_qlist_post(struct sfxge_txq *txq); 148227569Sphilipstatic void sfxge_tx_qunblock(struct sfxge_txq *txq); 149227569Sphilipstatic int sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 150283514Sarybchik const bus_dma_segment_t *dma_seg, int n_dma_seg, 151342455Sarybchik int n_extra_descs); 152227569Sphilip 153342455Sarybchikstatic inline void 154342455Sarybchiksfxge_next_stmp(struct sfxge_txq *txq, struct sfxge_tx_mapping **pstmp) 155342455Sarybchik{ 156342455Sarybchik KASSERT((*pstmp)->flags == 0, ("stmp flags are not 0")); 157342455Sarybchik if (__predict_false(*pstmp == 158342455Sarybchik &txq->stmp[txq->ptr_mask])) 159342455Sarybchik *pstmp = &txq->stmp[0]; 160342455Sarybchik else 161342455Sarybchik (*pstmp)++; 162342455Sarybchik} 163342455Sarybchik 164283514Sarybchikstatic int 165342455Sarybchiksfxge_tx_maybe_toggle_cksum_offload(struct sfxge_txq *txq, struct mbuf *mbuf, 166342455Sarybchik struct sfxge_tx_mapping **pstmp) 167283514Sarybchik{ 168342455Sarybchik uint16_t new_hw_cksum_flags; 169342455Sarybchik efx_desc_t *desc; 170342455Sarybchik 171342455Sarybchik if (mbuf->m_pkthdr.csum_flags & 172342455Sarybchik (CSUM_DELAY_DATA | CSUM_DELAY_DATA_IPV6 | CSUM_TSO)) { 173342455Sarybchik /* 174342455Sarybchik * We always set EFX_TXQ_CKSUM_IPV4 here because this 175342455Sarybchik * configuration is the most useful, and this won't 176342455Sarybchik * cause any trouble in case of IPv6 traffic anyway. 177342455Sarybchik */ 178342455Sarybchik new_hw_cksum_flags = EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP; 179342455Sarybchik } else if (mbuf->m_pkthdr.csum_flags & CSUM_DELAY_IP) { 180342455Sarybchik new_hw_cksum_flags = EFX_TXQ_CKSUM_IPV4; 181342455Sarybchik } else { 182342455Sarybchik new_hw_cksum_flags = 0; 183342455Sarybchik } 184342455Sarybchik 185342455Sarybchik if (new_hw_cksum_flags == txq->hw_cksum_flags) 186342455Sarybchik return (0); 187342455Sarybchik 188342455Sarybchik desc = &txq->pend_desc[txq->n_pend_desc]; 189342455Sarybchik efx_tx_qdesc_checksum_create(txq->common, new_hw_cksum_flags, desc); 190342455Sarybchik txq->hw_cksum_flags = new_hw_cksum_flags; 191342455Sarybchik txq->n_pend_desc++; 192342455Sarybchik 193342455Sarybchik sfxge_next_stmp(txq, pstmp); 194342455Sarybchik 195342455Sarybchik return (1); 196342455Sarybchik} 197342455Sarybchik 198342455Sarybchikstatic int 199342455Sarybchiksfxge_tx_maybe_insert_tag(struct sfxge_txq *txq, struct mbuf *mbuf, 200342455Sarybchik struct sfxge_tx_mapping **pstmp) 201342455Sarybchik{ 202283514Sarybchik uint16_t this_tag = ((mbuf->m_flags & M_VLANTAG) ? 203283514Sarybchik mbuf->m_pkthdr.ether_vtag : 204283514Sarybchik 0); 205342455Sarybchik efx_desc_t *desc; 206283514Sarybchik 207283514Sarybchik if (this_tag == txq->hw_vlan_tci) 208283514Sarybchik return (0); 209283514Sarybchik 210342455Sarybchik desc = &txq->pend_desc[txq->n_pend_desc]; 211342455Sarybchik efx_tx_qdesc_vlantci_create(txq->common, bswap16(this_tag), desc); 212283514Sarybchik txq->hw_vlan_tci = this_tag; 213342455Sarybchik txq->n_pend_desc++; 214342455Sarybchik 215342455Sarybchik sfxge_next_stmp(txq, pstmp); 216342455Sarybchik 217283514Sarybchik return (1); 218283514Sarybchik} 219283514Sarybchik 220227569Sphilipvoid 221277889Sarybchiksfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq) 222227569Sphilip{ 223227569Sphilip unsigned int completed; 224227569Sphilip 225278221Sarybchik SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 226227569Sphilip 227227569Sphilip completed = txq->completed; 228227569Sphilip while (completed != txq->pending) { 229227569Sphilip struct sfxge_tx_mapping *stmp; 230227569Sphilip unsigned int id; 231227569Sphilip 232272328Sgnn id = completed++ & txq->ptr_mask; 233227569Sphilip 234227569Sphilip stmp = &txq->stmp[id]; 235227569Sphilip if (stmp->flags & TX_BUF_UNMAP) { 236227569Sphilip bus_dmamap_unload(txq->packet_dma_tag, stmp->map); 237227569Sphilip if (stmp->flags & TX_BUF_MBUF) { 238227569Sphilip struct mbuf *m = stmp->u.mbuf; 239227569Sphilip do 240227569Sphilip m = m_free(m); 241227569Sphilip while (m != NULL); 242227569Sphilip } else { 243227569Sphilip free(stmp->u.heap_buf, M_SFXGE); 244227569Sphilip } 245227569Sphilip stmp->flags = 0; 246227569Sphilip } 247227569Sphilip } 248227569Sphilip txq->completed = completed; 249227569Sphilip 250227569Sphilip /* Check whether we need to unblock the queue. */ 251227569Sphilip mb(); 252227569Sphilip if (txq->blocked) { 253227569Sphilip unsigned int level; 254227569Sphilip 255227569Sphilip level = txq->added - txq->completed; 256272328Sgnn if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) 257227569Sphilip sfxge_tx_qunblock(txq); 258227569Sphilip } 259227569Sphilip} 260227569Sphilip 261278837Sarybchikstatic unsigned int 262277895Sarybchiksfxge_is_mbuf_non_tcp(struct mbuf *mbuf) 263277895Sarybchik{ 264298955Spfg /* Absence of TCP checksum flags does not mean that it is non-TCP 265277895Sarybchik * but it should be true if user wants to achieve high throughput. 266277895Sarybchik */ 267277895Sarybchik return (!(mbuf->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP))); 268277895Sarybchik} 269277895Sarybchik 270227569Sphilip/* 271227569Sphilip * Reorder the put list and append it to the get list. 272227569Sphilip */ 273227569Sphilipstatic void 274227569Sphilipsfxge_tx_qdpl_swizzle(struct sfxge_txq *txq) 275227569Sphilip{ 276227569Sphilip struct sfxge_tx_dpl *stdp; 277227569Sphilip struct mbuf *mbuf, *get_next, **get_tailp; 278227569Sphilip volatile uintptr_t *putp; 279227569Sphilip uintptr_t put; 280227569Sphilip unsigned int count; 281277895Sarybchik unsigned int non_tcp_count; 282227569Sphilip 283278221Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 284227569Sphilip 285227569Sphilip stdp = &txq->dpl; 286227569Sphilip 287227569Sphilip /* Acquire the put list. */ 288227569Sphilip putp = &stdp->std_put; 289227640Smarius put = atomic_readandclear_ptr(putp); 290227569Sphilip mbuf = (void *)put; 291227569Sphilip 292227569Sphilip if (mbuf == NULL) 293227569Sphilip return; 294227569Sphilip 295227569Sphilip /* Reverse the put list. */ 296227569Sphilip get_tailp = &mbuf->m_nextpkt; 297227569Sphilip get_next = NULL; 298227569Sphilip 299227569Sphilip count = 0; 300277895Sarybchik non_tcp_count = 0; 301227569Sphilip do { 302227569Sphilip struct mbuf *put_next; 303227569Sphilip 304277895Sarybchik non_tcp_count += sfxge_is_mbuf_non_tcp(mbuf); 305227569Sphilip put_next = mbuf->m_nextpkt; 306227569Sphilip mbuf->m_nextpkt = get_next; 307227569Sphilip get_next = mbuf; 308227569Sphilip mbuf = put_next; 309227569Sphilip 310227569Sphilip count++; 311227569Sphilip } while (mbuf != NULL); 312227569Sphilip 313279231Sarybchik if (count > stdp->std_put_hiwat) 314279231Sarybchik stdp->std_put_hiwat = count; 315279231Sarybchik 316227569Sphilip /* Append the reversed put list to the get list. */ 317227569Sphilip KASSERT(*get_tailp == NULL, ("*get_tailp != NULL")); 318227569Sphilip *stdp->std_getp = get_next; 319227569Sphilip stdp->std_getp = get_tailp; 320272330Sgnn stdp->std_get_count += count; 321277895Sarybchik stdp->std_get_non_tcp_count += non_tcp_count; 322227569Sphilip} 323227569Sphilip 324227569Sphilipstatic void 325227569Sphilipsfxge_tx_qreap(struct sfxge_txq *txq) 326227569Sphilip{ 327278221Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 328227569Sphilip 329227569Sphilip txq->reaped = txq->completed; 330227569Sphilip} 331227569Sphilip 332227569Sphilipstatic void 333227569Sphilipsfxge_tx_qlist_post(struct sfxge_txq *txq) 334227569Sphilip{ 335227569Sphilip unsigned int old_added; 336283514Sarybchik unsigned int block_level; 337227569Sphilip unsigned int level; 338227569Sphilip int rc; 339227569Sphilip 340278221Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 341227569Sphilip 342227569Sphilip KASSERT(txq->n_pend_desc != 0, ("txq->n_pend_desc == 0")); 343283514Sarybchik KASSERT(txq->n_pend_desc <= txq->max_pkt_desc, 344227569Sphilip ("txq->n_pend_desc too large")); 345227569Sphilip KASSERT(!txq->blocked, ("txq->blocked")); 346227569Sphilip 347227569Sphilip old_added = txq->added; 348227569Sphilip 349227569Sphilip /* Post the fragment list. */ 350283514Sarybchik rc = efx_tx_qdesc_post(txq->common, txq->pend_desc, txq->n_pend_desc, 351227569Sphilip txq->reaped, &txq->added); 352283514Sarybchik KASSERT(rc == 0, ("efx_tx_qdesc_post() failed")); 353227569Sphilip 354283514Sarybchik /* If efx_tx_qdesc_post() had to refragment, our information about 355227569Sphilip * buffers to free may be associated with the wrong 356227569Sphilip * descriptors. 357227569Sphilip */ 358227569Sphilip KASSERT(txq->added - old_added == txq->n_pend_desc, 359283514Sarybchik ("efx_tx_qdesc_post() refragmented descriptors")); 360227569Sphilip 361227569Sphilip level = txq->added - txq->reaped; 362272328Sgnn KASSERT(level <= txq->entries, ("overfilled TX queue")); 363227569Sphilip 364227569Sphilip /* Clear the fragment list. */ 365227569Sphilip txq->n_pend_desc = 0; 366227569Sphilip 367283514Sarybchik /* 368283514Sarybchik * Set the block level to ensure there is space to generate a 369283514Sarybchik * large number of descriptors for TSO. 370283514Sarybchik */ 371283514Sarybchik block_level = EFX_TXQ_LIMIT(txq->entries) - txq->max_pkt_desc; 372283514Sarybchik 373227569Sphilip /* Have we reached the block level? */ 374283514Sarybchik if (level < block_level) 375227569Sphilip return; 376227569Sphilip 377227569Sphilip /* Reap, and check again */ 378227569Sphilip sfxge_tx_qreap(txq); 379227569Sphilip level = txq->added - txq->reaped; 380283514Sarybchik if (level < block_level) 381227569Sphilip return; 382227569Sphilip 383227569Sphilip txq->blocked = 1; 384227569Sphilip 385227569Sphilip /* 386227569Sphilip * Avoid a race with completion interrupt handling that could leave 387227569Sphilip * the queue blocked. 388227569Sphilip */ 389227569Sphilip mb(); 390227569Sphilip sfxge_tx_qreap(txq); 391227569Sphilip level = txq->added - txq->reaped; 392283514Sarybchik if (level < block_level) { 393227569Sphilip mb(); 394227569Sphilip txq->blocked = 0; 395227569Sphilip } 396227569Sphilip} 397227569Sphilip 398227569Sphilipstatic int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf) 399227569Sphilip{ 400227569Sphilip bus_dmamap_t *used_map; 401227569Sphilip bus_dmamap_t map; 402227569Sphilip bus_dma_segment_t dma_seg[SFXGE_TX_MAPPING_MAX_SEG]; 403227569Sphilip unsigned int id; 404227569Sphilip struct sfxge_tx_mapping *stmp; 405283514Sarybchik efx_desc_t *desc; 406227569Sphilip int n_dma_seg; 407227569Sphilip int rc; 408227569Sphilip int i; 409283514Sarybchik int eop; 410342455Sarybchik uint16_t hw_cksum_flags_prev; 411342451Sarybchik uint16_t hw_vlan_tci_prev; 412342455Sarybchik int n_extra_descs; 413227569Sphilip 414227569Sphilip KASSERT(!txq->blocked, ("txq->blocked")); 415227569Sphilip 416312157Sarybchik#if SFXGE_TX_PARSE_EARLY 417312157Sarybchik /* 418312157Sarybchik * If software TSO is used, we still need to copy packet header, 419312157Sarybchik * even if we have already parsed it early before enqueue. 420312157Sarybchik */ 421312157Sarybchik if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) && 422312157Sarybchik (txq->tso_fw_assisted == 0)) 423312157Sarybchik prefetch_read_many(mbuf->m_data); 424312157Sarybchik#else 425312157Sarybchik /* 426312157Sarybchik * Prefetch packet header since we need to parse it and extract 427312157Sarybchik * IP ID, TCP sequence number and flags. 428312157Sarybchik */ 429227569Sphilip if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) 430227569Sphilip prefetch_read_many(mbuf->m_data); 431312157Sarybchik#endif 432227569Sphilip 433279351Sarybchik if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) { 434227569Sphilip rc = EINTR; 435227569Sphilip goto reject; 436227569Sphilip } 437227569Sphilip 438227569Sphilip /* Load the packet for DMA. */ 439272328Sgnn id = txq->added & txq->ptr_mask; 440227569Sphilip stmp = &txq->stmp[id]; 441227569Sphilip rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, stmp->map, 442227569Sphilip mbuf, dma_seg, &n_dma_seg, 0); 443227569Sphilip if (rc == EFBIG) { 444227569Sphilip /* Try again. */ 445243857Sglebius struct mbuf *new_mbuf = m_collapse(mbuf, M_NOWAIT, 446227569Sphilip SFXGE_TX_MAPPING_MAX_SEG); 447227569Sphilip if (new_mbuf == NULL) 448227569Sphilip goto reject; 449227569Sphilip ++txq->collapses; 450227569Sphilip mbuf = new_mbuf; 451227569Sphilip rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, 452227569Sphilip stmp->map, mbuf, 453227569Sphilip dma_seg, &n_dma_seg, 0); 454227569Sphilip } 455227569Sphilip if (rc != 0) 456227569Sphilip goto reject; 457227569Sphilip 458227569Sphilip /* Make the packet visible to the hardware. */ 459227569Sphilip bus_dmamap_sync(txq->packet_dma_tag, stmp->map, BUS_DMASYNC_PREWRITE); 460227569Sphilip 461227569Sphilip used_map = &stmp->map; 462227569Sphilip 463342455Sarybchik hw_cksum_flags_prev = txq->hw_cksum_flags; 464342451Sarybchik hw_vlan_tci_prev = txq->hw_vlan_tci; 465342451Sarybchik 466342455Sarybchik /* 467342455Sarybchik * The order of option descriptors, which are used to leverage VLAN tag 468342455Sarybchik * and checksum offloads, might be important. Changing checksum offload 469342455Sarybchik * between VLAN option and packet descriptors probably does not work. 470342455Sarybchik */ 471342455Sarybchik n_extra_descs = sfxge_tx_maybe_toggle_cksum_offload(txq, mbuf, &stmp); 472342455Sarybchik n_extra_descs += sfxge_tx_maybe_insert_tag(txq, mbuf, &stmp); 473342455Sarybchik 474227569Sphilip if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) { 475342455Sarybchik rc = sfxge_tx_queue_tso(txq, mbuf, dma_seg, n_dma_seg, 476342455Sarybchik n_extra_descs); 477227569Sphilip if (rc < 0) 478227569Sphilip goto reject_mapped; 479283514Sarybchik stmp = &txq->stmp[(rc - 1) & txq->ptr_mask]; 480227569Sphilip } else { 481227569Sphilip /* Add the mapping to the fragment list, and set flags 482227569Sphilip * for the buffer. 483227569Sphilip */ 484283514Sarybchik 485227569Sphilip i = 0; 486227569Sphilip for (;;) { 487342455Sarybchik desc = &txq->pend_desc[i + n_extra_descs]; 488283514Sarybchik eop = (i == n_dma_seg - 1); 489283514Sarybchik efx_tx_qdesc_dma_create(txq->common, 490283514Sarybchik dma_seg[i].ds_addr, 491283514Sarybchik dma_seg[i].ds_len, 492283514Sarybchik eop, 493283514Sarybchik desc); 494283514Sarybchik if (eop) 495227569Sphilip break; 496227569Sphilip i++; 497283514Sarybchik sfxge_next_stmp(txq, &stmp); 498227569Sphilip } 499342455Sarybchik txq->n_pend_desc = n_dma_seg + n_extra_descs; 500227569Sphilip } 501227569Sphilip 502227569Sphilip /* 503227569Sphilip * If the mapping required more than one descriptor 504227569Sphilip * then we need to associate the DMA map with the last 505227569Sphilip * descriptor, not the first. 506227569Sphilip */ 507227569Sphilip if (used_map != &stmp->map) { 508227569Sphilip map = stmp->map; 509227569Sphilip stmp->map = *used_map; 510227569Sphilip *used_map = map; 511227569Sphilip } 512227569Sphilip 513227569Sphilip stmp->u.mbuf = mbuf; 514227569Sphilip stmp->flags = TX_BUF_UNMAP | TX_BUF_MBUF; 515227569Sphilip 516227569Sphilip /* Post the fragment list. */ 517227569Sphilip sfxge_tx_qlist_post(txq); 518227569Sphilip 519272325Sgnn return (0); 520227569Sphilip 521227569Sphilipreject_mapped: 522342451Sarybchik txq->hw_vlan_tci = hw_vlan_tci_prev; 523342455Sarybchik txq->hw_cksum_flags = hw_cksum_flags_prev; 524227569Sphilip bus_dmamap_unload(txq->packet_dma_tag, *used_map); 525227569Sphilipreject: 526227569Sphilip /* Drop the packet on the floor. */ 527227569Sphilip m_freem(mbuf); 528227569Sphilip ++txq->drops; 529227569Sphilip 530272325Sgnn return (rc); 531227569Sphilip} 532227569Sphilip 533227569Sphilip/* 534227569Sphilip * Drain the deferred packet list into the transmit queue. 535227569Sphilip */ 536227569Sphilipstatic void 537227569Sphilipsfxge_tx_qdpl_drain(struct sfxge_txq *txq) 538227569Sphilip{ 539227569Sphilip struct sfxge_softc *sc; 540227569Sphilip struct sfxge_tx_dpl *stdp; 541227569Sphilip struct mbuf *mbuf, *next; 542227569Sphilip unsigned int count; 543277895Sarybchik unsigned int non_tcp_count; 544227569Sphilip unsigned int pushed; 545227569Sphilip int rc; 546227569Sphilip 547278221Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 548227569Sphilip 549227569Sphilip sc = txq->sc; 550227569Sphilip stdp = &txq->dpl; 551227569Sphilip pushed = txq->added; 552227569Sphilip 553280163Sarybchik if (__predict_true(txq->init_state == SFXGE_TXQ_STARTED)) { 554280163Sarybchik prefetch_read_many(sc->enp); 555280163Sarybchik prefetch_read_many(txq->common); 556280163Sarybchik } 557227569Sphilip 558227569Sphilip mbuf = stdp->std_get; 559272330Sgnn count = stdp->std_get_count; 560277895Sarybchik non_tcp_count = stdp->std_get_non_tcp_count; 561227569Sphilip 562277895Sarybchik if (count > stdp->std_get_hiwat) 563277895Sarybchik stdp->std_get_hiwat = count; 564277895Sarybchik 565227569Sphilip while (count != 0) { 566227569Sphilip KASSERT(mbuf != NULL, ("mbuf == NULL")); 567227569Sphilip 568227569Sphilip next = mbuf->m_nextpkt; 569227569Sphilip mbuf->m_nextpkt = NULL; 570227569Sphilip 571227569Sphilip ETHER_BPF_MTAP(sc->ifnet, mbuf); /* packet capture */ 572227569Sphilip 573227569Sphilip if (next != NULL) 574227569Sphilip prefetch_read_many(next); 575227569Sphilip 576227569Sphilip rc = sfxge_tx_queue_mbuf(txq, mbuf); 577227569Sphilip --count; 578277895Sarybchik non_tcp_count -= sfxge_is_mbuf_non_tcp(mbuf); 579227569Sphilip mbuf = next; 580227569Sphilip if (rc != 0) 581227569Sphilip continue; 582227569Sphilip 583227569Sphilip if (txq->blocked) 584227569Sphilip break; 585227569Sphilip 586227569Sphilip /* Push the fragments to the hardware in batches. */ 587227569Sphilip if (txq->added - pushed >= SFXGE_TX_BATCH) { 588283514Sarybchik efx_tx_qpush(txq->common, txq->added, pushed); 589227569Sphilip pushed = txq->added; 590227569Sphilip } 591227569Sphilip } 592227569Sphilip 593227569Sphilip if (count == 0) { 594227569Sphilip KASSERT(mbuf == NULL, ("mbuf != NULL")); 595277895Sarybchik KASSERT(non_tcp_count == 0, 596277895Sarybchik ("inconsistent TCP/non-TCP detection")); 597227569Sphilip stdp->std_get = NULL; 598272330Sgnn stdp->std_get_count = 0; 599277895Sarybchik stdp->std_get_non_tcp_count = 0; 600227569Sphilip stdp->std_getp = &stdp->std_get; 601227569Sphilip } else { 602227569Sphilip stdp->std_get = mbuf; 603272330Sgnn stdp->std_get_count = count; 604277895Sarybchik stdp->std_get_non_tcp_count = non_tcp_count; 605227569Sphilip } 606227569Sphilip 607227569Sphilip if (txq->added != pushed) 608283514Sarybchik efx_tx_qpush(txq->common, txq->added, pushed); 609227569Sphilip 610272330Sgnn KASSERT(txq->blocked || stdp->std_get_count == 0, 611227569Sphilip ("queue unblocked but count is non-zero")); 612227569Sphilip} 613227569Sphilip 614283514Sarybchik#define SFXGE_TX_QDPL_PENDING(_txq) ((_txq)->dpl.std_put != 0) 615227569Sphilip 616227569Sphilip/* 617227569Sphilip * Service the deferred packet list. 618227569Sphilip * 619227569Sphilip * NOTE: drops the txq mutex! 620227569Sphilip */ 621278837Sarybchikstatic void 622227569Sphilipsfxge_tx_qdpl_service(struct sfxge_txq *txq) 623227569Sphilip{ 624278221Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 625227569Sphilip 626227569Sphilip do { 627227569Sphilip if (SFXGE_TX_QDPL_PENDING(txq)) 628227569Sphilip sfxge_tx_qdpl_swizzle(txq); 629227569Sphilip 630227569Sphilip if (!txq->blocked) 631227569Sphilip sfxge_tx_qdpl_drain(txq); 632227569Sphilip 633278221Sarybchik SFXGE_TXQ_UNLOCK(txq); 634227569Sphilip } while (SFXGE_TX_QDPL_PENDING(txq) && 635278221Sarybchik SFXGE_TXQ_TRYLOCK(txq)); 636227569Sphilip} 637227569Sphilip 638227569Sphilip/* 639282942Sarybchik * Put a packet on the deferred packet get-list. 640227569Sphilip */ 641278837Sarybchikstatic int 642282942Sarybchiksfxge_tx_qdpl_put_locked(struct sfxge_txq *txq, struct mbuf *mbuf) 643227569Sphilip{ 644227569Sphilip struct sfxge_tx_dpl *stdp; 645227569Sphilip 646227569Sphilip stdp = &txq->dpl; 647227569Sphilip 648227569Sphilip KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 649227569Sphilip 650282942Sarybchik SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 651227569Sphilip 652282942Sarybchik if (stdp->std_get_count >= stdp->std_get_max) { 653282942Sarybchik txq->get_overflow++; 654282942Sarybchik return (ENOBUFS); 655282942Sarybchik } 656282942Sarybchik if (sfxge_is_mbuf_non_tcp(mbuf)) { 657282942Sarybchik if (stdp->std_get_non_tcp_count >= 658282942Sarybchik stdp->std_get_non_tcp_max) { 659282942Sarybchik txq->get_non_tcp_overflow++; 660263649Sglebius return (ENOBUFS); 661277895Sarybchik } 662282942Sarybchik stdp->std_get_non_tcp_count++; 663282942Sarybchik } 664263649Sglebius 665282942Sarybchik *(stdp->std_getp) = mbuf; 666282942Sarybchik stdp->std_getp = &mbuf->m_nextpkt; 667282942Sarybchik stdp->std_get_count++; 668227569Sphilip 669282942Sarybchik return (0); 670282942Sarybchik} 671227569Sphilip 672282942Sarybchik/* 673282942Sarybchik * Put a packet on the deferred packet put-list. 674282942Sarybchik * 675282942Sarybchik * We overload the csum_data field in the mbuf to keep track of this length 676282942Sarybchik * because there is no cheap alternative to avoid races. 677282942Sarybchik */ 678282942Sarybchikstatic int 679282942Sarybchiksfxge_tx_qdpl_put_unlocked(struct sfxge_txq *txq, struct mbuf *mbuf) 680282942Sarybchik{ 681282942Sarybchik struct sfxge_tx_dpl *stdp; 682282942Sarybchik volatile uintptr_t *putp; 683282942Sarybchik uintptr_t old; 684282942Sarybchik uintptr_t new; 685311028Sarybchik unsigned int put_count; 686227569Sphilip 687282942Sarybchik KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 688282942Sarybchik 689282942Sarybchik SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 690282942Sarybchik 691282942Sarybchik stdp = &txq->dpl; 692282942Sarybchik putp = &stdp->std_put; 693282942Sarybchik new = (uintptr_t)mbuf; 694282942Sarybchik 695282942Sarybchik do { 696282942Sarybchik old = *putp; 697282942Sarybchik if (old != 0) { 698282942Sarybchik struct mbuf *mp = (struct mbuf *)old; 699311028Sarybchik put_count = mp->m_pkthdr.csum_data; 700282942Sarybchik } else 701311028Sarybchik put_count = 0; 702311028Sarybchik if (put_count >= stdp->std_put_max) { 703282942Sarybchik atomic_add_long(&txq->put_overflow, 1); 704282942Sarybchik return (ENOBUFS); 705282942Sarybchik } 706311028Sarybchik mbuf->m_pkthdr.csum_data = put_count + 1; 707282942Sarybchik mbuf->m_nextpkt = (void *)old; 708282942Sarybchik } while (atomic_cmpset_ptr(putp, old, new) == 0); 709282942Sarybchik 710227569Sphilip return (0); 711227569Sphilip} 712227569Sphilip 713227569Sphilip/* 714227569Sphilip * Called from if_transmit - will try to grab the txq lock and enqueue to the 715279141Sarybchik * put list if it succeeds, otherwise try to push onto the defer list if space. 716227569Sphilip */ 717283514Sarybchikstatic int 718227569Sphilipsfxge_tx_packet_add(struct sfxge_txq *txq, struct mbuf *m) 719227569Sphilip{ 720227569Sphilip int rc; 721227569Sphilip 722263332Sglebius if (!SFXGE_LINK_UP(txq->sc)) { 723277895Sarybchik atomic_add_long(&txq->netdown_drops, 1); 724282998Sarybchik return (ENETDOWN); 725263332Sglebius } 726263332Sglebius 727227569Sphilip /* 728227569Sphilip * Try to grab the txq lock. If we are able to get the lock, 729227569Sphilip * the packet will be appended to the "get list" of the deferred 730227569Sphilip * packet list. Otherwise, it will be pushed on the "put list". 731227569Sphilip */ 732282997Sarybchik if (SFXGE_TXQ_TRYLOCK(txq)) { 733282942Sarybchik /* First swizzle put-list to get-list to keep order */ 734282942Sarybchik sfxge_tx_qdpl_swizzle(txq); 735282942Sarybchik 736282942Sarybchik rc = sfxge_tx_qdpl_put_locked(txq, m); 737282997Sarybchik 738282997Sarybchik /* Try to service the list. */ 739282997Sarybchik sfxge_tx_qdpl_service(txq); 740282997Sarybchik /* Lock has been dropped. */ 741282942Sarybchik } else { 742282942Sarybchik rc = sfxge_tx_qdpl_put_unlocked(txq, m); 743227569Sphilip 744282942Sarybchik /* 745282942Sarybchik * Try to grab the lock again. 746282942Sarybchik * 747282942Sarybchik * If we are able to get the lock, we need to process 748282942Sarybchik * the deferred packet list. If we are not able to get 749282942Sarybchik * the lock, another thread is processing the list. 750282942Sarybchik */ 751283048Sarybchik if ((rc == 0) && SFXGE_TXQ_TRYLOCK(txq)) { 752282997Sarybchik sfxge_tx_qdpl_service(txq); 753282997Sarybchik /* Lock has been dropped. */ 754282997Sarybchik } 755282942Sarybchik } 756227569Sphilip 757282997Sarybchik SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 758227569Sphilip 759283048Sarybchik return (rc); 760227569Sphilip} 761227569Sphilip 762227569Sphilipstatic void 763227569Sphilipsfxge_tx_qdpl_flush(struct sfxge_txq *txq) 764227569Sphilip{ 765227569Sphilip struct sfxge_tx_dpl *stdp = &txq->dpl; 766227569Sphilip struct mbuf *mbuf, *next; 767227569Sphilip 768278221Sarybchik SFXGE_TXQ_LOCK(txq); 769227569Sphilip 770227569Sphilip sfxge_tx_qdpl_swizzle(txq); 771227569Sphilip for (mbuf = stdp->std_get; mbuf != NULL; mbuf = next) { 772227569Sphilip next = mbuf->m_nextpkt; 773227569Sphilip m_freem(mbuf); 774227569Sphilip } 775227569Sphilip stdp->std_get = NULL; 776272330Sgnn stdp->std_get_count = 0; 777277895Sarybchik stdp->std_get_non_tcp_count = 0; 778272325Sgnn stdp->std_getp = &stdp->std_get; 779227569Sphilip 780278221Sarybchik SFXGE_TXQ_UNLOCK(txq); 781227569Sphilip} 782227569Sphilip 783227569Sphilipvoid 784227569Sphilipsfxge_if_qflush(struct ifnet *ifp) 785227569Sphilip{ 786227569Sphilip struct sfxge_softc *sc; 787280433Sarybchik unsigned int i; 788227569Sphilip 789227569Sphilip sc = ifp->if_softc; 790227569Sphilip 791278938Sarybchik for (i = 0; i < sc->txq_count; i++) 792227569Sphilip sfxge_tx_qdpl_flush(sc->txq[i]); 793227569Sphilip} 794227569Sphilip 795291584Sarybchik#if SFXGE_TX_PARSE_EARLY 796291584Sarybchik 797291584Sarybchik/* There is little space for user data in mbuf pkthdr, so we 798291584Sarybchik * use l*hlen fields which are not used by the driver otherwise 799291584Sarybchik * to store header offsets. 800291584Sarybchik * The fields are 8-bit, but it's ok, no header may be longer than 255 bytes. 801291584Sarybchik */ 802291584Sarybchik 803291584Sarybchik 804291584Sarybchik#define TSO_MBUF_PROTO(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.sixteen[0]) 805291584Sarybchik/* We abuse l5hlen here because PH_loc can hold only 64 bits of data */ 806291584Sarybchik#define TSO_MBUF_FLAGS(_mbuf) ((_mbuf)->m_pkthdr.l5hlen) 807291584Sarybchik#define TSO_MBUF_PACKETID(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.sixteen[1]) 808291584Sarybchik#define TSO_MBUF_SEQNUM(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.thirtytwo[1]) 809291584Sarybchik 810291584Sarybchikstatic void sfxge_parse_tx_packet(struct mbuf *mbuf) 811291584Sarybchik{ 812291584Sarybchik struct ether_header *eh = mtod(mbuf, struct ether_header *); 813291584Sarybchik const struct tcphdr *th; 814291584Sarybchik struct tcphdr th_copy; 815291584Sarybchik 816291584Sarybchik /* Find network protocol and header */ 817291584Sarybchik TSO_MBUF_PROTO(mbuf) = eh->ether_type; 818291584Sarybchik if (TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_VLAN)) { 819291584Sarybchik struct ether_vlan_header *veh = 820291584Sarybchik mtod(mbuf, struct ether_vlan_header *); 821291584Sarybchik TSO_MBUF_PROTO(mbuf) = veh->evl_proto; 822291584Sarybchik mbuf->m_pkthdr.l2hlen = sizeof(*veh); 823291584Sarybchik } else { 824291584Sarybchik mbuf->m_pkthdr.l2hlen = sizeof(*eh); 825291584Sarybchik } 826291584Sarybchik 827291584Sarybchik /* Find TCP header */ 828291584Sarybchik if (TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_IP)) { 829291584Sarybchik const struct ip *iph = (const struct ip *)mtodo(mbuf, mbuf->m_pkthdr.l2hlen); 830291584Sarybchik 831291584Sarybchik KASSERT(iph->ip_p == IPPROTO_TCP, 832291584Sarybchik ("TSO required on non-TCP packet")); 833291584Sarybchik mbuf->m_pkthdr.l3hlen = mbuf->m_pkthdr.l2hlen + 4 * iph->ip_hl; 834291584Sarybchik TSO_MBUF_PACKETID(mbuf) = iph->ip_id; 835291584Sarybchik } else { 836291584Sarybchik KASSERT(TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_IPV6), 837291584Sarybchik ("TSO required on non-IP packet")); 838291584Sarybchik KASSERT(((const struct ip6_hdr *)mtodo(mbuf, mbuf->m_pkthdr.l2hlen))->ip6_nxt == 839291584Sarybchik IPPROTO_TCP, 840291584Sarybchik ("TSO required on non-TCP packet")); 841291584Sarybchik mbuf->m_pkthdr.l3hlen = mbuf->m_pkthdr.l2hlen + sizeof(struct ip6_hdr); 842291584Sarybchik TSO_MBUF_PACKETID(mbuf) = 0; 843291584Sarybchik } 844291584Sarybchik 845291584Sarybchik KASSERT(mbuf->m_len >= mbuf->m_pkthdr.l3hlen, 846291584Sarybchik ("network header is fragmented in mbuf")); 847291584Sarybchik 848291584Sarybchik /* We need TCP header including flags (window is the next) */ 849291584Sarybchik if (mbuf->m_len < mbuf->m_pkthdr.l3hlen + offsetof(struct tcphdr, th_win)) { 850291584Sarybchik m_copydata(mbuf, mbuf->m_pkthdr.l3hlen, sizeof(th_copy), 851291584Sarybchik (caddr_t)&th_copy); 852291584Sarybchik th = &th_copy; 853291584Sarybchik } else { 854291584Sarybchik th = (const struct tcphdr *)mtodo(mbuf, mbuf->m_pkthdr.l3hlen); 855291584Sarybchik } 856291584Sarybchik 857291584Sarybchik mbuf->m_pkthdr.l4hlen = mbuf->m_pkthdr.l3hlen + 4 * th->th_off; 858291584Sarybchik TSO_MBUF_SEQNUM(mbuf) = ntohl(th->th_seq); 859291584Sarybchik 860291584Sarybchik /* These flags must not be duplicated */ 861291584Sarybchik /* 862291584Sarybchik * RST should not be duplicated as well, but FreeBSD kernel 863291584Sarybchik * generates TSO packets with RST flag. So, do not assert 864291584Sarybchik * its absence. 865291584Sarybchik */ 866291584Sarybchik KASSERT(!(th->th_flags & (TH_URG | TH_SYN)), 867291584Sarybchik ("incompatible TCP flag 0x%x on TSO packet", 868291584Sarybchik th->th_flags & (TH_URG | TH_SYN))); 869291584Sarybchik TSO_MBUF_FLAGS(mbuf) = th->th_flags; 870291584Sarybchik} 871291584Sarybchik#endif 872291584Sarybchik 873227569Sphilip/* 874227569Sphilip * TX start -- called by the stack. 875227569Sphilip */ 876227569Sphilipint 877227569Sphilipsfxge_if_transmit(struct ifnet *ifp, struct mbuf *m) 878272325Sgnn{ 879227569Sphilip struct sfxge_softc *sc; 880227569Sphilip struct sfxge_txq *txq; 881227569Sphilip int rc; 882227569Sphilip 883227569Sphilip sc = (struct sfxge_softc *)ifp->if_softc; 884227569Sphilip 885280374Sarybchik /* 886280374Sarybchik * Transmit may be called when interface is up from the kernel 887280374Sarybchik * point of view, but not yet up (in progress) from the driver 888280374Sarybchik * point of view. I.e. link aggregation bring up. 889280374Sarybchik * Transmit may be called when interface is up from the driver 890280374Sarybchik * point of view, but already down from the kernel point of 891280374Sarybchik * view. I.e. Rx when interface shutdown is in progress. 892280374Sarybchik */ 893280374Sarybchik KASSERT((ifp->if_flags & IFF_UP) || (sc->if_flags & IFF_UP), 894280374Sarybchik ("interface not up")); 895227569Sphilip 896227569Sphilip /* Pick the desired transmit queue. */ 897342455Sarybchik if (sc->txq_dynamic_cksum_toggle_supported | 898342455Sarybchik (m->m_pkthdr.csum_flags & 899342455Sarybchik (CSUM_DELAY_DATA | CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_TSO))) { 900227569Sphilip int index = 0; 901227569Sphilip 902301494Sarybchik#ifdef RSS 903301494Sarybchik uint32_t bucket_id; 904301494Sarybchik 905301494Sarybchik /* 906301494Sarybchik * Select a TX queue which matches the corresponding 907301494Sarybchik * RX queue for the hash in order to assign both 908301494Sarybchik * TX and RX parts of the flow to the same CPU 909301494Sarybchik */ 910301494Sarybchik if (rss_m2bucket(m, &bucket_id) == 0) 911301494Sarybchik index = bucket_id % (sc->txq_count - (SFXGE_TXQ_NTYPES - 1)); 912301494Sarybchik#else 913275358Shselasky /* check if flowid is set */ 914275358Shselasky if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) { 915227569Sphilip uint32_t hash = m->m_pkthdr.flowid; 916310831Sarybchik uint32_t idx = hash % nitems(sc->rx_indir_table); 917227569Sphilip 918310831Sarybchik index = sc->rx_indir_table[idx]; 919227569Sphilip } 920301494Sarybchik#endif 921291584Sarybchik#if SFXGE_TX_PARSE_EARLY 922291584Sarybchik if (m->m_pkthdr.csum_flags & CSUM_TSO) 923291584Sarybchik sfxge_parse_tx_packet(m); 924291584Sarybchik#endif 925342455Sarybchik index += (sc->txq_dynamic_cksum_toggle_supported == B_FALSE) ? 926342455Sarybchik SFXGE_TXQ_IP_TCP_UDP_CKSUM : 0; 927342455Sarybchik txq = sc->txq[index]; 928227569Sphilip } else if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) { 929227569Sphilip txq = sc->txq[SFXGE_TXQ_IP_CKSUM]; 930227569Sphilip } else { 931227569Sphilip txq = sc->txq[SFXGE_TXQ_NON_CKSUM]; 932227569Sphilip } 933227569Sphilip 934227569Sphilip rc = sfxge_tx_packet_add(txq, m); 935282998Sarybchik if (rc != 0) 936282998Sarybchik m_freem(m); 937227569Sphilip 938227569Sphilip return (rc); 939227569Sphilip} 940227569Sphilip 941227569Sphilip/* 942227569Sphilip * Software "TSO". Not quite as good as doing it in hardware, but 943227569Sphilip * still faster than segmenting in the stack. 944227569Sphilip */ 945227569Sphilip 946227569Sphilipstruct sfxge_tso_state { 947227569Sphilip /* Output position */ 948227569Sphilip unsigned out_len; /* Remaining length in current segment */ 949227569Sphilip unsigned seqnum; /* Current sequence number */ 950227569Sphilip unsigned packet_space; /* Remaining space in current packet */ 951294077Sarybchik unsigned segs_space; /* Remaining number of DMA segments 952294077Sarybchik for the packet (FATSOv2 only) */ 953227569Sphilip 954227569Sphilip /* Input position */ 955227569Sphilip uint64_t dma_addr; /* DMA address of current position */ 956227569Sphilip unsigned in_len; /* Remaining length in current mbuf */ 957227569Sphilip 958227569Sphilip const struct mbuf *mbuf; /* Input mbuf (head of chain) */ 959227569Sphilip u_short protocol; /* Network protocol (after VLAN decap) */ 960227569Sphilip ssize_t nh_off; /* Offset of network header */ 961227569Sphilip ssize_t tcph_off; /* Offset of TCP header */ 962227569Sphilip unsigned header_len; /* Number of bytes of header */ 963278937Sarybchik unsigned seg_size; /* TCP segment size */ 964283514Sarybchik int fw_assisted; /* Use FW-assisted TSO */ 965283514Sarybchik u_short packet_id; /* IPv4 packet ID from the original packet */ 966291584Sarybchik uint8_t tcp_flags; /* TCP flags */ 967283514Sarybchik efx_desc_t header_desc; /* Precomputed header descriptor for 968283514Sarybchik * FW-assisted TSO */ 969227569Sphilip}; 970227569Sphilip 971291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 972278837Sarybchikstatic const struct ip *tso_iph(const struct sfxge_tso_state *tso) 973227569Sphilip{ 974227569Sphilip KASSERT(tso->protocol == htons(ETHERTYPE_IP), 975227569Sphilip ("tso_iph() in non-IPv4 state")); 976227569Sphilip return (const struct ip *)(tso->mbuf->m_data + tso->nh_off); 977227569Sphilip} 978291584Sarybchik 979278837Sarybchikstatic __unused const struct ip6_hdr *tso_ip6h(const struct sfxge_tso_state *tso) 980227569Sphilip{ 981227569Sphilip KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 982227569Sphilip ("tso_ip6h() in non-IPv6 state")); 983227569Sphilip return (const struct ip6_hdr *)(tso->mbuf->m_data + tso->nh_off); 984227569Sphilip} 985291584Sarybchik 986278837Sarybchikstatic const struct tcphdr *tso_tcph(const struct sfxge_tso_state *tso) 987227569Sphilip{ 988227569Sphilip return (const struct tcphdr *)(tso->mbuf->m_data + tso->tcph_off); 989227569Sphilip} 990291584Sarybchik#endif 991227569Sphilip 992291584Sarybchik 993227569Sphilip/* Size of preallocated TSO header buffers. Larger blocks must be 994227569Sphilip * allocated from the heap. 995227569Sphilip */ 996272325Sgnn#define TSOH_STD_SIZE 128 997227569Sphilip 998227569Sphilip/* At most half the descriptors in the queue at any time will refer to 999227569Sphilip * a TSO header buffer, since they must always be followed by a 1000227569Sphilip * payload descriptor referring to an mbuf. 1001227569Sphilip */ 1002272328Sgnn#define TSOH_COUNT(_txq_entries) ((_txq_entries) / 2u) 1003272325Sgnn#define TSOH_PER_PAGE (PAGE_SIZE / TSOH_STD_SIZE) 1004272328Sgnn#define TSOH_PAGE_COUNT(_txq_entries) \ 1005298646Spfg howmany(TSOH_COUNT(_txq_entries), TSOH_PER_PAGE) 1006227569Sphilip 1007227569Sphilipstatic int tso_init(struct sfxge_txq *txq) 1008227569Sphilip{ 1009227569Sphilip struct sfxge_softc *sc = txq->sc; 1010272328Sgnn unsigned int tsoh_page_count = TSOH_PAGE_COUNT(sc->txq_entries); 1011227569Sphilip int i, rc; 1012227569Sphilip 1013227569Sphilip /* Allocate TSO header buffers */ 1014272328Sgnn txq->tsoh_buffer = malloc(tsoh_page_count * sizeof(txq->tsoh_buffer[0]), 1015227569Sphilip M_SFXGE, M_WAITOK); 1016227569Sphilip 1017272328Sgnn for (i = 0; i < tsoh_page_count; i++) { 1018227569Sphilip rc = sfxge_dma_alloc(sc, PAGE_SIZE, &txq->tsoh_buffer[i]); 1019272325Sgnn if (rc != 0) 1020227569Sphilip goto fail; 1021227569Sphilip } 1022227569Sphilip 1023272325Sgnn return (0); 1024227569Sphilip 1025227569Sphilipfail: 1026227569Sphilip while (i-- > 0) 1027227569Sphilip sfxge_dma_free(&txq->tsoh_buffer[i]); 1028227569Sphilip free(txq->tsoh_buffer, M_SFXGE); 1029227569Sphilip txq->tsoh_buffer = NULL; 1030272325Sgnn return (rc); 1031227569Sphilip} 1032227569Sphilip 1033227569Sphilipstatic void tso_fini(struct sfxge_txq *txq) 1034227569Sphilip{ 1035227569Sphilip int i; 1036227569Sphilip 1037272325Sgnn if (txq->tsoh_buffer != NULL) { 1038272328Sgnn for (i = 0; i < TSOH_PAGE_COUNT(txq->sc->txq_entries); i++) 1039227569Sphilip sfxge_dma_free(&txq->tsoh_buffer[i]); 1040227569Sphilip free(txq->tsoh_buffer, M_SFXGE); 1041227569Sphilip } 1042227569Sphilip} 1043227569Sphilip 1044283514Sarybchikstatic void tso_start(struct sfxge_txq *txq, struct sfxge_tso_state *tso, 1045283514Sarybchik const bus_dma_segment_t *hdr_dma_seg, 1046283514Sarybchik struct mbuf *mbuf) 1047227569Sphilip{ 1048291584Sarybchik const efx_nic_cfg_t *encp = efx_nic_cfg_get(txq->sc->enp); 1049291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 1050227569Sphilip struct ether_header *eh = mtod(mbuf, struct ether_header *); 1051279046Sarybchik const struct tcphdr *th; 1052279046Sarybchik struct tcphdr th_copy; 1053291584Sarybchik#endif 1054227569Sphilip 1055294077Sarybchik tso->fw_assisted = txq->tso_fw_assisted; 1056227569Sphilip tso->mbuf = mbuf; 1057227569Sphilip 1058227569Sphilip /* Find network protocol and header */ 1059291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 1060227569Sphilip tso->protocol = eh->ether_type; 1061227569Sphilip if (tso->protocol == htons(ETHERTYPE_VLAN)) { 1062227569Sphilip struct ether_vlan_header *veh = 1063227569Sphilip mtod(mbuf, struct ether_vlan_header *); 1064227569Sphilip tso->protocol = veh->evl_proto; 1065227569Sphilip tso->nh_off = sizeof(*veh); 1066227569Sphilip } else { 1067227569Sphilip tso->nh_off = sizeof(*eh); 1068227569Sphilip } 1069291584Sarybchik#else 1070291584Sarybchik tso->protocol = TSO_MBUF_PROTO(mbuf); 1071291584Sarybchik tso->nh_off = mbuf->m_pkthdr.l2hlen; 1072291584Sarybchik tso->tcph_off = mbuf->m_pkthdr.l3hlen; 1073301607Sarybchik tso->packet_id = ntohs(TSO_MBUF_PACKETID(mbuf)); 1074291584Sarybchik#endif 1075227569Sphilip 1076291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 1077227569Sphilip /* Find TCP header */ 1078227569Sphilip if (tso->protocol == htons(ETHERTYPE_IP)) { 1079227569Sphilip KASSERT(tso_iph(tso)->ip_p == IPPROTO_TCP, 1080227569Sphilip ("TSO required on non-TCP packet")); 1081227569Sphilip tso->tcph_off = tso->nh_off + 4 * tso_iph(tso)->ip_hl; 1082301607Sarybchik tso->packet_id = ntohs(tso_iph(tso)->ip_id); 1083227569Sphilip } else { 1084227569Sphilip KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 1085227569Sphilip ("TSO required on non-IP packet")); 1086227569Sphilip KASSERT(tso_ip6h(tso)->ip6_nxt == IPPROTO_TCP, 1087227569Sphilip ("TSO required on non-TCP packet")); 1088227569Sphilip tso->tcph_off = tso->nh_off + sizeof(struct ip6_hdr); 1089283514Sarybchik tso->packet_id = 0; 1090227569Sphilip } 1091291584Sarybchik#endif 1092291584Sarybchik 1093291584Sarybchik 1094283514Sarybchik if (tso->fw_assisted && 1095283514Sarybchik __predict_false(tso->tcph_off > 1096283514Sarybchik encp->enc_tx_tso_tcp_header_offset_limit)) { 1097283514Sarybchik tso->fw_assisted = 0; 1098283514Sarybchik } 1099227569Sphilip 1100291584Sarybchik 1101291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 1102279046Sarybchik KASSERT(mbuf->m_len >= tso->tcph_off, 1103279046Sarybchik ("network header is fragmented in mbuf")); 1104279046Sarybchik /* We need TCP header including flags (window is the next) */ 1105279046Sarybchik if (mbuf->m_len < tso->tcph_off + offsetof(struct tcphdr, th_win)) { 1106279046Sarybchik m_copydata(tso->mbuf, tso->tcph_off, sizeof(th_copy), 1107279046Sarybchik (caddr_t)&th_copy); 1108279046Sarybchik th = &th_copy; 1109279046Sarybchik } else { 1110279046Sarybchik th = tso_tcph(tso); 1111279046Sarybchik } 1112279046Sarybchik tso->header_len = tso->tcph_off + 4 * th->th_off; 1113291584Sarybchik#else 1114291584Sarybchik tso->header_len = mbuf->m_pkthdr.l4hlen; 1115291584Sarybchik#endif 1116278937Sarybchik tso->seg_size = mbuf->m_pkthdr.tso_segsz; 1117227569Sphilip 1118291584Sarybchik#if !SFXGE_TX_PARSE_EARLY 1119279046Sarybchik tso->seqnum = ntohl(th->th_seq); 1120227569Sphilip 1121227569Sphilip /* These flags must not be duplicated */ 1122283278Sarybchik /* 1123283278Sarybchik * RST should not be duplicated as well, but FreeBSD kernel 1124283278Sarybchik * generates TSO packets with RST flag. So, do not assert 1125283278Sarybchik * its absence. 1126283278Sarybchik */ 1127283278Sarybchik KASSERT(!(th->th_flags & (TH_URG | TH_SYN)), 1128283278Sarybchik ("incompatible TCP flag 0x%x on TSO packet", 1129283278Sarybchik th->th_flags & (TH_URG | TH_SYN))); 1130291584Sarybchik tso->tcp_flags = th->th_flags; 1131291584Sarybchik#else 1132291584Sarybchik tso->seqnum = TSO_MBUF_SEQNUM(mbuf); 1133291584Sarybchik tso->tcp_flags = TSO_MBUF_FLAGS(mbuf); 1134291584Sarybchik#endif 1135227569Sphilip 1136227569Sphilip tso->out_len = mbuf->m_pkthdr.len - tso->header_len; 1137283514Sarybchik 1138283514Sarybchik if (tso->fw_assisted) { 1139283514Sarybchik if (hdr_dma_seg->ds_len >= tso->header_len) 1140283514Sarybchik efx_tx_qdesc_dma_create(txq->common, 1141283514Sarybchik hdr_dma_seg->ds_addr, 1142283514Sarybchik tso->header_len, 1143283514Sarybchik B_FALSE, 1144283514Sarybchik &tso->header_desc); 1145283514Sarybchik else 1146283514Sarybchik tso->fw_assisted = 0; 1147283514Sarybchik } 1148227569Sphilip} 1149227569Sphilip 1150227569Sphilip/* 1151227569Sphilip * tso_fill_packet_with_fragment - form descriptors for the current fragment 1152227569Sphilip * 1153227569Sphilip * Form descriptors for the current fragment, until we reach the end 1154227569Sphilip * of fragment or end-of-packet. Return 0 on success, 1 if not enough 1155227569Sphilip * space. 1156227569Sphilip */ 1157227569Sphilipstatic void tso_fill_packet_with_fragment(struct sfxge_txq *txq, 1158227569Sphilip struct sfxge_tso_state *tso) 1159227569Sphilip{ 1160283514Sarybchik efx_desc_t *desc; 1161227569Sphilip int n; 1162294077Sarybchik uint64_t dma_addr = tso->dma_addr; 1163294077Sarybchik boolean_t eop; 1164227569Sphilip 1165227569Sphilip if (tso->in_len == 0 || tso->packet_space == 0) 1166227569Sphilip return; 1167227569Sphilip 1168227569Sphilip KASSERT(tso->in_len > 0, ("TSO input length went negative")); 1169227569Sphilip KASSERT(tso->packet_space > 0, ("TSO packet space went negative")); 1170227569Sphilip 1171294077Sarybchik if (tso->fw_assisted & SFXGE_FATSOV2) { 1172294077Sarybchik n = tso->in_len; 1173294077Sarybchik tso->out_len -= n; 1174294077Sarybchik tso->seqnum += n; 1175294077Sarybchik tso->in_len = 0; 1176294077Sarybchik if (n < tso->packet_space) { 1177294077Sarybchik tso->packet_space -= n; 1178294077Sarybchik tso->segs_space--; 1179294077Sarybchik } else { 1180294077Sarybchik tso->packet_space = tso->seg_size - 1181294077Sarybchik (n - tso->packet_space) % tso->seg_size; 1182294077Sarybchik tso->segs_space = 1183294077Sarybchik EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1 - 1184294077Sarybchik (tso->packet_space != tso->seg_size); 1185294077Sarybchik } 1186294077Sarybchik } else { 1187294077Sarybchik n = min(tso->in_len, tso->packet_space); 1188294077Sarybchik tso->packet_space -= n; 1189294077Sarybchik tso->out_len -= n; 1190294077Sarybchik tso->dma_addr += n; 1191294077Sarybchik tso->in_len -= n; 1192294077Sarybchik } 1193227569Sphilip 1194294077Sarybchik /* 1195294077Sarybchik * It is OK to use binary OR below to avoid extra branching 1196294077Sarybchik * since all conditions may always be checked. 1197294077Sarybchik */ 1198294077Sarybchik eop = (tso->out_len == 0) | (tso->packet_space == 0) | 1199294077Sarybchik (tso->segs_space == 0); 1200227569Sphilip 1201227569Sphilip desc = &txq->pend_desc[txq->n_pend_desc++]; 1202294077Sarybchik efx_tx_qdesc_dma_create(txq->common, dma_addr, n, eop, desc); 1203227569Sphilip} 1204227569Sphilip 1205227569Sphilip/* Callback from bus_dmamap_load() for long TSO headers. */ 1206227569Sphilipstatic void tso_map_long_header(void *dma_addr_ret, 1207227569Sphilip bus_dma_segment_t *segs, int nseg, 1208227569Sphilip int error) 1209227569Sphilip{ 1210227569Sphilip *(uint64_t *)dma_addr_ret = ((__predict_true(error == 0) && 1211227569Sphilip __predict_true(nseg == 1)) ? 1212227569Sphilip segs->ds_addr : 0); 1213227569Sphilip} 1214227569Sphilip 1215227569Sphilip/* 1216227569Sphilip * tso_start_new_packet - generate a new header and prepare for the new packet 1217227569Sphilip * 1218227569Sphilip * Generate a new header and prepare for the new packet. Return 0 on 1219227569Sphilip * success, or an error code if failed to alloc header. 1220227569Sphilip */ 1221227569Sphilipstatic int tso_start_new_packet(struct sfxge_txq *txq, 1222227569Sphilip struct sfxge_tso_state *tso, 1223283514Sarybchik unsigned int *idp) 1224227569Sphilip{ 1225283514Sarybchik unsigned int id = *idp; 1226227569Sphilip struct tcphdr *tsoh_th; 1227227569Sphilip unsigned ip_length; 1228227569Sphilip caddr_t header; 1229227569Sphilip uint64_t dma_addr; 1230227569Sphilip bus_dmamap_t map; 1231283514Sarybchik efx_desc_t *desc; 1232227569Sphilip int rc; 1233227569Sphilip 1234283514Sarybchik if (tso->fw_assisted) { 1235294077Sarybchik if (tso->fw_assisted & SFXGE_FATSOV2) { 1236294077Sarybchik /* Add 2 FATSOv2 option descriptors */ 1237294077Sarybchik desc = &txq->pend_desc[txq->n_pend_desc]; 1238294077Sarybchik efx_tx_qdesc_tso2_create(txq->common, 1239294077Sarybchik tso->packet_id, 1240294077Sarybchik tso->seqnum, 1241294077Sarybchik tso->seg_size, 1242294077Sarybchik desc, 1243294077Sarybchik EFX_TX_FATSOV2_OPT_NDESCS); 1244294077Sarybchik desc += EFX_TX_FATSOV2_OPT_NDESCS; 1245294077Sarybchik txq->n_pend_desc += EFX_TX_FATSOV2_OPT_NDESCS; 1246294077Sarybchik KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1247294077Sarybchik id = (id + EFX_TX_FATSOV2_OPT_NDESCS) & txq->ptr_mask; 1248227569Sphilip 1249294077Sarybchik tso->segs_space = 1250294077Sarybchik EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1; 1251294077Sarybchik } else { 1252294077Sarybchik uint8_t tcp_flags = tso->tcp_flags; 1253227569Sphilip 1254294077Sarybchik if (tso->out_len > tso->seg_size) 1255294077Sarybchik tcp_flags &= ~(TH_FIN | TH_PUSH); 1256283514Sarybchik 1257294077Sarybchik /* Add FATSOv1 option descriptor */ 1258294077Sarybchik desc = &txq->pend_desc[txq->n_pend_desc++]; 1259294077Sarybchik efx_tx_qdesc_tso_create(txq->common, 1260294077Sarybchik tso->packet_id, 1261294077Sarybchik tso->seqnum, 1262294077Sarybchik tcp_flags, 1263294077Sarybchik desc++); 1264294077Sarybchik KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1265294077Sarybchik id = (id + 1) & txq->ptr_mask; 1266294077Sarybchik 1267294077Sarybchik tso->seqnum += tso->seg_size; 1268294077Sarybchik tso->segs_space = UINT_MAX; 1269294077Sarybchik } 1270294077Sarybchik 1271283514Sarybchik /* Header DMA descriptor */ 1272283514Sarybchik *desc = tso->header_desc; 1273283514Sarybchik txq->n_pend_desc++; 1274283514Sarybchik KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1275283514Sarybchik id = (id + 1) & txq->ptr_mask; 1276227569Sphilip } else { 1277283514Sarybchik /* Allocate a DMA-mapped header buffer. */ 1278283514Sarybchik if (__predict_true(tso->header_len <= TSOH_STD_SIZE)) { 1279283514Sarybchik unsigned int page_index = (id / 2) / TSOH_PER_PAGE; 1280283514Sarybchik unsigned int buf_index = (id / 2) % TSOH_PER_PAGE; 1281283514Sarybchik 1282283514Sarybchik header = (txq->tsoh_buffer[page_index].esm_base + 1283283514Sarybchik buf_index * TSOH_STD_SIZE); 1284283514Sarybchik dma_addr = (txq->tsoh_buffer[page_index].esm_addr + 1285283514Sarybchik buf_index * TSOH_STD_SIZE); 1286283514Sarybchik map = txq->tsoh_buffer[page_index].esm_map; 1287283514Sarybchik 1288283514Sarybchik KASSERT(txq->stmp[id].flags == 0, 1289283514Sarybchik ("stmp flags are not 0")); 1290283514Sarybchik } else { 1291283514Sarybchik struct sfxge_tx_mapping *stmp = &txq->stmp[id]; 1292283514Sarybchik 1293283514Sarybchik /* We cannot use bus_dmamem_alloc() as that may sleep */ 1294283514Sarybchik header = malloc(tso->header_len, M_SFXGE, M_NOWAIT); 1295283514Sarybchik if (__predict_false(!header)) 1296283514Sarybchik return (ENOMEM); 1297283514Sarybchik rc = bus_dmamap_load(txq->packet_dma_tag, stmp->map, 1298283514Sarybchik header, tso->header_len, 1299283514Sarybchik tso_map_long_header, &dma_addr, 1300283514Sarybchik BUS_DMA_NOWAIT); 1301283514Sarybchik if (__predict_false(dma_addr == 0)) { 1302283514Sarybchik if (rc == 0) { 1303283514Sarybchik /* Succeeded but got >1 segment */ 1304283514Sarybchik bus_dmamap_unload(txq->packet_dma_tag, 1305283514Sarybchik stmp->map); 1306283514Sarybchik rc = EINVAL; 1307283514Sarybchik } 1308283514Sarybchik free(header, M_SFXGE); 1309283514Sarybchik return (rc); 1310227569Sphilip } 1311283514Sarybchik map = stmp->map; 1312283514Sarybchik 1313283514Sarybchik txq->tso_long_headers++; 1314283514Sarybchik stmp->u.heap_buf = header; 1315283514Sarybchik stmp->flags = TX_BUF_UNMAP; 1316227569Sphilip } 1317227569Sphilip 1318283514Sarybchik tsoh_th = (struct tcphdr *)(header + tso->tcph_off); 1319227569Sphilip 1320283514Sarybchik /* Copy and update the headers. */ 1321283514Sarybchik m_copydata(tso->mbuf, 0, tso->header_len, header); 1322227569Sphilip 1323283514Sarybchik tsoh_th->th_seq = htonl(tso->seqnum); 1324283514Sarybchik tso->seqnum += tso->seg_size; 1325283514Sarybchik if (tso->out_len > tso->seg_size) { 1326283514Sarybchik /* This packet will not finish the TSO burst. */ 1327283514Sarybchik ip_length = tso->header_len - tso->nh_off + tso->seg_size; 1328283514Sarybchik tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH); 1329283514Sarybchik } else { 1330283514Sarybchik /* This packet will be the last in the TSO burst. */ 1331283514Sarybchik ip_length = tso->header_len - tso->nh_off + tso->out_len; 1332283514Sarybchik } 1333227569Sphilip 1334283514Sarybchik if (tso->protocol == htons(ETHERTYPE_IP)) { 1335283514Sarybchik struct ip *tsoh_iph = (struct ip *)(header + tso->nh_off); 1336283514Sarybchik tsoh_iph->ip_len = htons(ip_length); 1337283514Sarybchik /* XXX We should increment ip_id, but FreeBSD doesn't 1338283514Sarybchik * currently allocate extra IDs for multiple segments. 1339283514Sarybchik */ 1340283514Sarybchik } else { 1341283514Sarybchik struct ip6_hdr *tsoh_iph = 1342283514Sarybchik (struct ip6_hdr *)(header + tso->nh_off); 1343283514Sarybchik tsoh_iph->ip6_plen = htons(ip_length - sizeof(*tsoh_iph)); 1344283514Sarybchik } 1345227569Sphilip 1346283514Sarybchik /* Make the header visible to the hardware. */ 1347283514Sarybchik bus_dmamap_sync(txq->packet_dma_tag, map, BUS_DMASYNC_PREWRITE); 1348283514Sarybchik 1349283514Sarybchik /* Form a descriptor for this header. */ 1350283514Sarybchik desc = &txq->pend_desc[txq->n_pend_desc++]; 1351283514Sarybchik efx_tx_qdesc_dma_create(txq->common, 1352283514Sarybchik dma_addr, 1353283514Sarybchik tso->header_len, 1354283514Sarybchik 0, 1355283514Sarybchik desc); 1356283514Sarybchik id = (id + 1) & txq->ptr_mask; 1357294077Sarybchik 1358294077Sarybchik tso->segs_space = UINT_MAX; 1359227569Sphilip } 1360278937Sarybchik tso->packet_space = tso->seg_size; 1361227569Sphilip txq->tso_packets++; 1362283514Sarybchik *idp = id; 1363227569Sphilip 1364272325Sgnn return (0); 1365227569Sphilip} 1366227569Sphilip 1367227569Sphilipstatic int 1368227569Sphilipsfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 1369283514Sarybchik const bus_dma_segment_t *dma_seg, int n_dma_seg, 1370342455Sarybchik int n_extra_descs) 1371227569Sphilip{ 1372227569Sphilip struct sfxge_tso_state tso; 1373283514Sarybchik unsigned int id; 1374277888Sarybchik unsigned skipped = 0; 1375227569Sphilip 1376283514Sarybchik tso_start(txq, &tso, dma_seg, mbuf); 1377227569Sphilip 1378277888Sarybchik while (dma_seg->ds_len + skipped <= tso.header_len) { 1379277888Sarybchik skipped += dma_seg->ds_len; 1380227569Sphilip --n_dma_seg; 1381227569Sphilip KASSERT(n_dma_seg, ("no payload found in TSO packet")); 1382227569Sphilip ++dma_seg; 1383227569Sphilip } 1384280807Sarybchik tso.in_len = dma_seg->ds_len - (tso.header_len - skipped); 1385277888Sarybchik tso.dma_addr = dma_seg->ds_addr + (tso.header_len - skipped); 1386227569Sphilip 1387342455Sarybchik id = (txq->added + n_extra_descs) & txq->ptr_mask; 1388283514Sarybchik if (__predict_false(tso_start_new_packet(txq, &tso, &id))) 1389272328Sgnn return (-1); 1390227569Sphilip 1391227569Sphilip while (1) { 1392283514Sarybchik tso_fill_packet_with_fragment(txq, &tso); 1393283514Sarybchik /* Exactly one DMA descriptor is added */ 1394283514Sarybchik KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0")); 1395272328Sgnn id = (id + 1) & txq->ptr_mask; 1396227569Sphilip 1397227569Sphilip /* Move onto the next fragment? */ 1398227569Sphilip if (tso.in_len == 0) { 1399227569Sphilip --n_dma_seg; 1400227569Sphilip if (n_dma_seg == 0) 1401227569Sphilip break; 1402227569Sphilip ++dma_seg; 1403227569Sphilip tso.in_len = dma_seg->ds_len; 1404227569Sphilip tso.dma_addr = dma_seg->ds_addr; 1405227569Sphilip } 1406227569Sphilip 1407227569Sphilip /* End of packet? */ 1408294077Sarybchik if ((tso.packet_space == 0) | (tso.segs_space == 0)) { 1409294077Sarybchik unsigned int n_fatso_opt_desc = 1410294077Sarybchik (tso.fw_assisted & SFXGE_FATSOV2) ? 1411294077Sarybchik EFX_TX_FATSOV2_OPT_NDESCS : 1412294077Sarybchik (tso.fw_assisted & SFXGE_FATSOV1) ? 1 : 0; 1413294077Sarybchik 1414227569Sphilip /* If the queue is now full due to tiny MSS, 1415227569Sphilip * or we can't create another header, discard 1416227569Sphilip * the remainder of the input mbuf but do not 1417227569Sphilip * roll back the work we have done. 1418227569Sphilip */ 1419294077Sarybchik if (txq->n_pend_desc + n_fatso_opt_desc + 1420294077Sarybchik 1 /* header */ + n_dma_seg > txq->max_pkt_desc) { 1421278255Sarybchik txq->tso_pdrop_too_many++; 1422227569Sphilip break; 1423278255Sarybchik } 1424227569Sphilip if (__predict_false(tso_start_new_packet(txq, &tso, 1425283514Sarybchik &id))) { 1426278255Sarybchik txq->tso_pdrop_no_rsrc++; 1427227569Sphilip break; 1428278255Sarybchik } 1429227569Sphilip } 1430227569Sphilip } 1431227569Sphilip 1432227569Sphilip txq->tso_bursts++; 1433272325Sgnn return (id); 1434227569Sphilip} 1435227569Sphilip 1436227569Sphilipstatic void 1437227569Sphilipsfxge_tx_qunblock(struct sfxge_txq *txq) 1438227569Sphilip{ 1439227569Sphilip struct sfxge_softc *sc; 1440227569Sphilip struct sfxge_evq *evq; 1441227569Sphilip 1442227569Sphilip sc = txq->sc; 1443227569Sphilip evq = sc->evq[txq->evq_index]; 1444227569Sphilip 1445278221Sarybchik SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 1446227569Sphilip 1447279351Sarybchik if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) 1448227569Sphilip return; 1449227569Sphilip 1450278221Sarybchik SFXGE_TXQ_LOCK(txq); 1451227569Sphilip 1452227569Sphilip if (txq->blocked) { 1453227569Sphilip unsigned int level; 1454227569Sphilip 1455227569Sphilip level = txq->added - txq->completed; 1456279080Sarybchik if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) { 1457279080Sarybchik /* reaped must be in sync with blocked */ 1458279080Sarybchik sfxge_tx_qreap(txq); 1459227569Sphilip txq->blocked = 0; 1460279080Sarybchik } 1461227569Sphilip } 1462227569Sphilip 1463227569Sphilip sfxge_tx_qdpl_service(txq); 1464227569Sphilip /* note: lock has been dropped */ 1465227569Sphilip} 1466227569Sphilip 1467227569Sphilipvoid 1468227569Sphilipsfxge_tx_qflush_done(struct sfxge_txq *txq) 1469227569Sphilip{ 1470227569Sphilip 1471227569Sphilip txq->flush_state = SFXGE_FLUSH_DONE; 1472227569Sphilip} 1473227569Sphilip 1474227569Sphilipstatic void 1475227569Sphilipsfxge_tx_qstop(struct sfxge_softc *sc, unsigned int index) 1476227569Sphilip{ 1477227569Sphilip struct sfxge_txq *txq; 1478227569Sphilip struct sfxge_evq *evq; 1479227569Sphilip unsigned int count; 1480227569Sphilip 1481283514Sarybchik SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 1482283514Sarybchik 1483227569Sphilip txq = sc->txq[index]; 1484227569Sphilip evq = sc->evq[txq->evq_index]; 1485227569Sphilip 1486283514Sarybchik SFXGE_EVQ_LOCK(evq); 1487278221Sarybchik SFXGE_TXQ_LOCK(txq); 1488227569Sphilip 1489227569Sphilip KASSERT(txq->init_state == SFXGE_TXQ_STARTED, 1490227569Sphilip ("txq->init_state != SFXGE_TXQ_STARTED")); 1491227569Sphilip 1492227569Sphilip txq->init_state = SFXGE_TXQ_INITIALIZED; 1493227569Sphilip 1494283514Sarybchik if (txq->flush_state != SFXGE_FLUSH_DONE) { 1495283514Sarybchik txq->flush_state = SFXGE_FLUSH_PENDING; 1496227569Sphilip 1497283514Sarybchik SFXGE_EVQ_UNLOCK(evq); 1498283514Sarybchik SFXGE_TXQ_UNLOCK(txq); 1499227569Sphilip 1500283514Sarybchik /* Flush the transmit queue. */ 1501283514Sarybchik if (efx_tx_qflush(txq->common) != 0) { 1502283514Sarybchik log(LOG_ERR, "%s: Flushing Tx queue %u failed\n", 1503283514Sarybchik device_get_nameunit(sc->dev), index); 1504283514Sarybchik txq->flush_state = SFXGE_FLUSH_DONE; 1505283514Sarybchik } else { 1506283514Sarybchik count = 0; 1507283514Sarybchik do { 1508283514Sarybchik /* Spin for 100ms. */ 1509283514Sarybchik DELAY(100000); 1510283514Sarybchik if (txq->flush_state != SFXGE_FLUSH_PENDING) 1511283514Sarybchik break; 1512283514Sarybchik } while (++count < 20); 1513283514Sarybchik } 1514283514Sarybchik SFXGE_EVQ_LOCK(evq); 1515283514Sarybchik SFXGE_TXQ_LOCK(txq); 1516227569Sphilip 1517283514Sarybchik KASSERT(txq->flush_state != SFXGE_FLUSH_FAILED, 1518283514Sarybchik ("txq->flush_state == SFXGE_FLUSH_FAILED")); 1519227569Sphilip 1520283514Sarybchik if (txq->flush_state != SFXGE_FLUSH_DONE) { 1521283514Sarybchik /* Flush timeout */ 1522283514Sarybchik log(LOG_ERR, "%s: Cannot flush Tx queue %u\n", 1523283514Sarybchik device_get_nameunit(sc->dev), index); 1524283514Sarybchik txq->flush_state = SFXGE_FLUSH_DONE; 1525283514Sarybchik } 1526283514Sarybchik } 1527227569Sphilip 1528227569Sphilip txq->blocked = 0; 1529227569Sphilip txq->pending = txq->added; 1530227569Sphilip 1531277889Sarybchik sfxge_tx_qcomplete(txq, evq); 1532227569Sphilip KASSERT(txq->completed == txq->added, 1533227569Sphilip ("txq->completed != txq->added")); 1534227569Sphilip 1535227569Sphilip sfxge_tx_qreap(txq); 1536227569Sphilip KASSERT(txq->reaped == txq->completed, 1537227569Sphilip ("txq->reaped != txq->completed")); 1538227569Sphilip 1539227569Sphilip txq->added = 0; 1540227569Sphilip txq->pending = 0; 1541227569Sphilip txq->completed = 0; 1542227569Sphilip txq->reaped = 0; 1543227569Sphilip 1544227569Sphilip /* Destroy the common code transmit queue. */ 1545227569Sphilip efx_tx_qdestroy(txq->common); 1546227569Sphilip txq->common = NULL; 1547227569Sphilip 1548227569Sphilip efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1549272328Sgnn EFX_TXQ_NBUFS(sc->txq_entries)); 1550227569Sphilip 1551342455Sarybchik txq->hw_cksum_flags = 0; 1552342455Sarybchik 1553278221Sarybchik SFXGE_EVQ_UNLOCK(evq); 1554278221Sarybchik SFXGE_TXQ_UNLOCK(txq); 1555227569Sphilip} 1556227569Sphilip 1557294077Sarybchik/* 1558294077Sarybchik * Estimate maximum number of Tx descriptors required for TSO packet. 1559294077Sarybchik * With minimum MSS and maximum mbuf length we might need more (even 1560294077Sarybchik * than a ring-ful of descriptors), but this should not happen in 1561294077Sarybchik * practice except due to deliberate attack. In that case we will 1562294077Sarybchik * truncate the output at a packet boundary. 1563294077Sarybchik */ 1564294077Sarybchikstatic unsigned int 1565294077Sarybchiksfxge_tx_max_pkt_desc(const struct sfxge_softc *sc, enum sfxge_txq_type type, 1566294077Sarybchik unsigned int tso_fw_assisted) 1567294077Sarybchik{ 1568294077Sarybchik /* One descriptor for every input fragment */ 1569294077Sarybchik unsigned int max_descs = SFXGE_TX_MAPPING_MAX_SEG; 1570294077Sarybchik unsigned int sw_tso_max_descs; 1571294077Sarybchik unsigned int fa_tso_v1_max_descs = 0; 1572294077Sarybchik unsigned int fa_tso_v2_max_descs = 0; 1573294077Sarybchik 1574342455Sarybchik /* Checksum offload Tx option descriptor may be required */ 1575342455Sarybchik if (sc->txq_dynamic_cksum_toggle_supported) 1576342455Sarybchik max_descs++; 1577342455Sarybchik 1578294077Sarybchik /* VLAN tagging Tx option descriptor may be required */ 1579294077Sarybchik if (efx_nic_cfg_get(sc->enp)->enc_hw_tx_insert_vlan_enabled) 1580294077Sarybchik max_descs++; 1581294077Sarybchik 1582294077Sarybchik if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) { 1583294077Sarybchik /* 1584294077Sarybchik * Plus header and payload descriptor for each output segment. 1585294077Sarybchik * Minus one since header fragment is already counted. 1586294077Sarybchik * Even if FATSO is used, we should be ready to fallback 1587294077Sarybchik * to do it in the driver. 1588294077Sarybchik */ 1589294077Sarybchik sw_tso_max_descs = SFXGE_TSO_MAX_SEGS * 2 - 1; 1590294077Sarybchik 1591294077Sarybchik /* FW assisted TSOv1 requires one more descriptor per segment 1592294077Sarybchik * in comparison to SW TSO */ 1593294077Sarybchik if (tso_fw_assisted & SFXGE_FATSOV1) 1594294077Sarybchik fa_tso_v1_max_descs = 1595294077Sarybchik sw_tso_max_descs + SFXGE_TSO_MAX_SEGS; 1596294077Sarybchik 1597294077Sarybchik /* FW assisted TSOv2 requires 3 (2 FATSO plus header) extra 1598294077Sarybchik * descriptors per superframe limited by number of DMA fetches 1599294077Sarybchik * per packet. The first packet header is already counted. 1600294077Sarybchik */ 1601294077Sarybchik if (tso_fw_assisted & SFXGE_FATSOV2) { 1602294077Sarybchik fa_tso_v2_max_descs = 1603294077Sarybchik howmany(SFXGE_TX_MAPPING_MAX_SEG, 1604294077Sarybchik EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1) * 1605294077Sarybchik (EFX_TX_FATSOV2_OPT_NDESCS + 1) - 1; 1606294077Sarybchik } 1607294077Sarybchik 1608294077Sarybchik max_descs += MAX(sw_tso_max_descs, 1609294077Sarybchik MAX(fa_tso_v1_max_descs, fa_tso_v2_max_descs)); 1610294077Sarybchik } 1611294077Sarybchik 1612294077Sarybchik return (max_descs); 1613294077Sarybchik} 1614294077Sarybchik 1615227569Sphilipstatic int 1616227569Sphilipsfxge_tx_qstart(struct sfxge_softc *sc, unsigned int index) 1617227569Sphilip{ 1618227569Sphilip struct sfxge_txq *txq; 1619227569Sphilip efsys_mem_t *esmp; 1620227569Sphilip uint16_t flags; 1621294077Sarybchik unsigned int tso_fw_assisted; 1622342455Sarybchik unsigned int label; 1623227569Sphilip struct sfxge_evq *evq; 1624283514Sarybchik unsigned int desc_index; 1625227569Sphilip int rc; 1626227569Sphilip 1627283514Sarybchik SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 1628283514Sarybchik 1629227569Sphilip txq = sc->txq[index]; 1630227569Sphilip esmp = &txq->mem; 1631227569Sphilip evq = sc->evq[txq->evq_index]; 1632227569Sphilip 1633227569Sphilip KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1634227569Sphilip ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1635227569Sphilip KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 1636227569Sphilip ("evq->init_state != SFXGE_EVQ_STARTED")); 1637227569Sphilip 1638227569Sphilip /* Program the buffer table. */ 1639227569Sphilip if ((rc = efx_sram_buf_tbl_set(sc->enp, txq->buf_base_id, esmp, 1640272328Sgnn EFX_TXQ_NBUFS(sc->txq_entries))) != 0) 1641272328Sgnn return (rc); 1642227569Sphilip 1643227569Sphilip /* Determine the kind of queue we are creating. */ 1644294077Sarybchik tso_fw_assisted = 0; 1645227569Sphilip switch (txq->type) { 1646227569Sphilip case SFXGE_TXQ_NON_CKSUM: 1647227569Sphilip flags = 0; 1648227569Sphilip break; 1649227569Sphilip case SFXGE_TXQ_IP_CKSUM: 1650291924Sarybchik flags = EFX_TXQ_CKSUM_IPV4; 1651227569Sphilip break; 1652227569Sphilip case SFXGE_TXQ_IP_TCP_UDP_CKSUM: 1653291924Sarybchik flags = EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP; 1654294077Sarybchik tso_fw_assisted = sc->tso_fw_assisted; 1655294077Sarybchik if (tso_fw_assisted & SFXGE_FATSOV2) 1656294077Sarybchik flags |= EFX_TXQ_FATSOV2; 1657227569Sphilip break; 1658227569Sphilip default: 1659227569Sphilip KASSERT(0, ("Impossible TX queue")); 1660227569Sphilip flags = 0; 1661227569Sphilip break; 1662227569Sphilip } 1663227569Sphilip 1664342455Sarybchik label = (sc->txq_dynamic_cksum_toggle_supported) ? 0 : txq->type; 1665342455Sarybchik 1666227569Sphilip /* Create the common code transmit queue. */ 1667342455Sarybchik if ((rc = efx_tx_qcreate(sc->enp, index, label, esmp, 1668272328Sgnn sc->txq_entries, txq->buf_base_id, flags, evq->common, 1669294077Sarybchik &txq->common, &desc_index)) != 0) { 1670294077Sarybchik /* Retry if no FATSOv2 resources, otherwise fail */ 1671294077Sarybchik if ((rc != ENOSPC) || (~flags & EFX_TXQ_FATSOV2)) 1672294077Sarybchik goto fail; 1673227569Sphilip 1674294077Sarybchik /* Looks like all FATSOv2 contexts are used */ 1675294077Sarybchik flags &= ~EFX_TXQ_FATSOV2; 1676294077Sarybchik tso_fw_assisted &= ~SFXGE_FATSOV2; 1677342455Sarybchik if ((rc = efx_tx_qcreate(sc->enp, index, label, esmp, 1678294077Sarybchik sc->txq_entries, txq->buf_base_id, flags, evq->common, 1679294077Sarybchik &txq->common, &desc_index)) != 0) 1680294077Sarybchik goto fail; 1681294077Sarybchik } 1682294077Sarybchik 1683283514Sarybchik /* Initialise queue descriptor indexes */ 1684283514Sarybchik txq->added = txq->pending = txq->completed = txq->reaped = desc_index; 1685283514Sarybchik 1686278221Sarybchik SFXGE_TXQ_LOCK(txq); 1687272325Sgnn 1688227569Sphilip /* Enable the transmit queue. */ 1689227569Sphilip efx_tx_qenable(txq->common); 1690227569Sphilip 1691227569Sphilip txq->init_state = SFXGE_TXQ_STARTED; 1692283514Sarybchik txq->flush_state = SFXGE_FLUSH_REQUIRED; 1693294077Sarybchik txq->tso_fw_assisted = tso_fw_assisted; 1694227569Sphilip 1695294077Sarybchik txq->max_pkt_desc = sfxge_tx_max_pkt_desc(sc, txq->type, 1696294077Sarybchik tso_fw_assisted); 1697294077Sarybchik 1698342404Sarybchik txq->hw_vlan_tci = 0; 1699342404Sarybchik 1700342455Sarybchik txq->hw_cksum_flags = flags & 1701342455Sarybchik (EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP); 1702342455Sarybchik 1703278221Sarybchik SFXGE_TXQ_UNLOCK(txq); 1704227569Sphilip 1705227569Sphilip return (0); 1706227569Sphilip 1707227569Sphilipfail: 1708227569Sphilip efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1709272328Sgnn EFX_TXQ_NBUFS(sc->txq_entries)); 1710272328Sgnn return (rc); 1711227569Sphilip} 1712227569Sphilip 1713227569Sphilipvoid 1714227569Sphilipsfxge_tx_stop(struct sfxge_softc *sc) 1715227569Sphilip{ 1716227569Sphilip int index; 1717227569Sphilip 1718278938Sarybchik index = sc->txq_count; 1719227569Sphilip while (--index >= 0) 1720278938Sarybchik sfxge_tx_qstop(sc, index); 1721227569Sphilip 1722227569Sphilip /* Tear down the transmit module */ 1723227569Sphilip efx_tx_fini(sc->enp); 1724227569Sphilip} 1725227569Sphilip 1726227569Sphilipint 1727227569Sphilipsfxge_tx_start(struct sfxge_softc *sc) 1728227569Sphilip{ 1729227569Sphilip int index; 1730227569Sphilip int rc; 1731227569Sphilip 1732227569Sphilip /* Initialize the common code transmit module. */ 1733227569Sphilip if ((rc = efx_tx_init(sc->enp)) != 0) 1734227569Sphilip return (rc); 1735227569Sphilip 1736278938Sarybchik for (index = 0; index < sc->txq_count; index++) { 1737278938Sarybchik if ((rc = sfxge_tx_qstart(sc, index)) != 0) 1738278938Sarybchik goto fail; 1739227569Sphilip } 1740227569Sphilip 1741227569Sphilip return (0); 1742227569Sphilip 1743278938Sarybchikfail: 1744227569Sphilip while (--index >= 0) 1745278938Sarybchik sfxge_tx_qstop(sc, index); 1746227569Sphilip 1747227569Sphilip efx_tx_fini(sc->enp); 1748227569Sphilip 1749227569Sphilip return (rc); 1750227569Sphilip} 1751227569Sphilip 1752280377Sarybchikstatic int 1753280377Sarybchiksfxge_txq_stat_init(struct sfxge_txq *txq, struct sysctl_oid *txq_node) 1754280377Sarybchik{ 1755280377Sarybchik struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(txq->sc->dev); 1756280377Sarybchik struct sysctl_oid *stat_node; 1757280377Sarybchik unsigned int id; 1758280377Sarybchik 1759280377Sarybchik stat_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 1760280377Sarybchik "stats", CTLFLAG_RD, NULL, 1761280377Sarybchik "Tx queue statistics"); 1762280377Sarybchik if (stat_node == NULL) 1763280377Sarybchik return (ENOMEM); 1764280377Sarybchik 1765280377Sarybchik for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1766280377Sarybchik SYSCTL_ADD_ULONG( 1767280377Sarybchik ctx, SYSCTL_CHILDREN(stat_node), OID_AUTO, 1768280377Sarybchik sfxge_tx_stats[id].name, CTLFLAG_RD | CTLFLAG_STATS, 1769280377Sarybchik (unsigned long *)((caddr_t)txq + sfxge_tx_stats[id].offset), 1770280377Sarybchik ""); 1771280377Sarybchik } 1772280377Sarybchik 1773280377Sarybchik return (0); 1774280377Sarybchik} 1775280377Sarybchik 1776227569Sphilip/** 1777227569Sphilip * Destroy a transmit queue. 1778227569Sphilip */ 1779227569Sphilipstatic void 1780227569Sphilipsfxge_tx_qfini(struct sfxge_softc *sc, unsigned int index) 1781227569Sphilip{ 1782227569Sphilip struct sfxge_txq *txq; 1783272328Sgnn unsigned int nmaps; 1784227569Sphilip 1785227569Sphilip txq = sc->txq[index]; 1786227569Sphilip 1787227569Sphilip KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1788227569Sphilip ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1789227569Sphilip 1790227569Sphilip if (txq->type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) 1791227569Sphilip tso_fini(txq); 1792227569Sphilip 1793227569Sphilip /* Free the context arrays. */ 1794227569Sphilip free(txq->pend_desc, M_SFXGE); 1795272328Sgnn nmaps = sc->txq_entries; 1796272325Sgnn while (nmaps-- != 0) 1797227569Sphilip bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1798227569Sphilip free(txq->stmp, M_SFXGE); 1799227569Sphilip 1800227569Sphilip /* Release DMA memory mapping. */ 1801227569Sphilip sfxge_dma_free(&txq->mem); 1802227569Sphilip 1803227569Sphilip sc->txq[index] = NULL; 1804227569Sphilip 1805278221Sarybchik SFXGE_TXQ_LOCK_DESTROY(txq); 1806227569Sphilip 1807227569Sphilip free(txq, M_SFXGE); 1808227569Sphilip} 1809227569Sphilip 1810227569Sphilipstatic int 1811227569Sphilipsfxge_tx_qinit(struct sfxge_softc *sc, unsigned int txq_index, 1812283514Sarybchik enum sfxge_txq_type type, unsigned int evq_index) 1813227569Sphilip{ 1814311765Sarybchik const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp); 1815272330Sgnn char name[16]; 1816280161Sarybchik struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1817272330Sgnn struct sysctl_oid *txq_node; 1818227569Sphilip struct sfxge_txq *txq; 1819227569Sphilip struct sfxge_evq *evq; 1820227569Sphilip struct sfxge_tx_dpl *stdp; 1821280161Sarybchik struct sysctl_oid *dpl_node; 1822227569Sphilip efsys_mem_t *esmp; 1823227569Sphilip unsigned int nmaps; 1824227569Sphilip int rc; 1825227569Sphilip 1826227569Sphilip txq = malloc(sizeof(struct sfxge_txq), M_SFXGE, M_ZERO | M_WAITOK); 1827227569Sphilip txq->sc = sc; 1828272328Sgnn txq->entries = sc->txq_entries; 1829272328Sgnn txq->ptr_mask = txq->entries - 1; 1830227569Sphilip 1831227569Sphilip sc->txq[txq_index] = txq; 1832227569Sphilip esmp = &txq->mem; 1833227569Sphilip 1834227569Sphilip evq = sc->evq[evq_index]; 1835227569Sphilip 1836227569Sphilip /* Allocate and zero DMA space for the descriptor ring. */ 1837272328Sgnn if ((rc = sfxge_dma_alloc(sc, EFX_TXQ_SIZE(sc->txq_entries), esmp)) != 0) 1838227569Sphilip return (rc); 1839227569Sphilip 1840227569Sphilip /* Allocate buffer table entries. */ 1841272328Sgnn sfxge_sram_buf_tbl_alloc(sc, EFX_TXQ_NBUFS(sc->txq_entries), 1842227569Sphilip &txq->buf_base_id); 1843227569Sphilip 1844227569Sphilip /* Create a DMA tag for packet mappings. */ 1845311765Sarybchik if (bus_dma_tag_create(sc->parent_dma_tag, 1, 1846311765Sarybchik encp->enc_tx_dma_desc_boundary, 1847227640Smarius MIN(0x3FFFFFFFFFFFUL, BUS_SPACE_MAXADDR), BUS_SPACE_MAXADDR, NULL, 1848311765Sarybchik NULL, 0x11000, SFXGE_TX_MAPPING_MAX_SEG, 1849311765Sarybchik encp->enc_tx_dma_desc_size_max, 0, NULL, NULL, 1850227569Sphilip &txq->packet_dma_tag) != 0) { 1851227569Sphilip device_printf(sc->dev, "Couldn't allocate txq DMA tag\n"); 1852227569Sphilip rc = ENOMEM; 1853227569Sphilip goto fail; 1854227569Sphilip } 1855227569Sphilip 1856227569Sphilip /* Allocate pending descriptor array for batching writes. */ 1857283514Sarybchik txq->pend_desc = malloc(sizeof(efx_desc_t) * sc->txq_entries, 1858227569Sphilip M_SFXGE, M_ZERO | M_WAITOK); 1859227569Sphilip 1860227569Sphilip /* Allocate and initialise mbuf DMA mapping array. */ 1861272328Sgnn txq->stmp = malloc(sizeof(struct sfxge_tx_mapping) * sc->txq_entries, 1862227569Sphilip M_SFXGE, M_ZERO | M_WAITOK); 1863272328Sgnn for (nmaps = 0; nmaps < sc->txq_entries; nmaps++) { 1864227569Sphilip rc = bus_dmamap_create(txq->packet_dma_tag, 0, 1865227569Sphilip &txq->stmp[nmaps].map); 1866227569Sphilip if (rc != 0) 1867227569Sphilip goto fail2; 1868227569Sphilip } 1869227569Sphilip 1870272330Sgnn snprintf(name, sizeof(name), "%u", txq_index); 1871280161Sarybchik txq_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->txqs_node), 1872280161Sarybchik OID_AUTO, name, CTLFLAG_RD, NULL, ""); 1873272330Sgnn if (txq_node == NULL) { 1874272330Sgnn rc = ENOMEM; 1875272330Sgnn goto fail_txq_node; 1876272330Sgnn } 1877272330Sgnn 1878227569Sphilip if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM && 1879227569Sphilip (rc = tso_init(txq)) != 0) 1880227569Sphilip goto fail3; 1881227569Sphilip 1882227569Sphilip /* Initialize the deferred packet list. */ 1883227569Sphilip stdp = &txq->dpl; 1884272331Sgnn stdp->std_put_max = sfxge_tx_dpl_put_max; 1885272331Sgnn stdp->std_get_max = sfxge_tx_dpl_get_max; 1886277895Sarybchik stdp->std_get_non_tcp_max = sfxge_tx_dpl_get_non_tcp_max; 1887227569Sphilip stdp->std_getp = &stdp->std_get; 1888227569Sphilip 1889278250Sarybchik SFXGE_TXQ_LOCK_INIT(txq, device_get_nameunit(sc->dev), txq_index); 1890272330Sgnn 1891280161Sarybchik dpl_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 1892280161Sarybchik "dpl", CTLFLAG_RD, NULL, 1893280161Sarybchik "Deferred packet list statistics"); 1894280161Sarybchik if (dpl_node == NULL) { 1895280161Sarybchik rc = ENOMEM; 1896280161Sarybchik goto fail_dpl_node; 1897280161Sarybchik } 1898280161Sarybchik 1899280161Sarybchik SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1900280161Sarybchik "get_count", CTLFLAG_RD | CTLFLAG_STATS, 1901272330Sgnn &stdp->std_get_count, 0, ""); 1902280161Sarybchik SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1903280161Sarybchik "get_non_tcp_count", CTLFLAG_RD | CTLFLAG_STATS, 1904277895Sarybchik &stdp->std_get_non_tcp_count, 0, ""); 1905280161Sarybchik SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1906280161Sarybchik "get_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 1907277895Sarybchik &stdp->std_get_hiwat, 0, ""); 1908280161Sarybchik SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 1909280161Sarybchik "put_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 1910279231Sarybchik &stdp->std_put_hiwat, 0, ""); 1911227569Sphilip 1912280377Sarybchik rc = sfxge_txq_stat_init(txq, txq_node); 1913280377Sarybchik if (rc != 0) 1914280377Sarybchik goto fail_txq_stat_init; 1915280377Sarybchik 1916227569Sphilip txq->type = type; 1917227569Sphilip txq->evq_index = evq_index; 1918227569Sphilip txq->init_state = SFXGE_TXQ_INITIALIZED; 1919227569Sphilip 1920227569Sphilip return (0); 1921227569Sphilip 1922280377Sarybchikfail_txq_stat_init: 1923280161Sarybchikfail_dpl_node: 1924227569Sphilipfail3: 1925272330Sgnnfail_txq_node: 1926227569Sphilip free(txq->pend_desc, M_SFXGE); 1927227569Sphilipfail2: 1928272325Sgnn while (nmaps-- != 0) 1929227569Sphilip bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1930227569Sphilip free(txq->stmp, M_SFXGE); 1931227569Sphilip bus_dma_tag_destroy(txq->packet_dma_tag); 1932227569Sphilip 1933227569Sphilipfail: 1934227569Sphilip sfxge_dma_free(esmp); 1935227569Sphilip 1936227569Sphilip return (rc); 1937227569Sphilip} 1938227569Sphilip 1939227569Sphilipstatic int 1940227569Sphilipsfxge_tx_stat_handler(SYSCTL_HANDLER_ARGS) 1941227569Sphilip{ 1942227569Sphilip struct sfxge_softc *sc = arg1; 1943227569Sphilip unsigned int id = arg2; 1944227569Sphilip unsigned long sum; 1945227569Sphilip unsigned int index; 1946227569Sphilip 1947227569Sphilip /* Sum across all TX queues */ 1948227569Sphilip sum = 0; 1949278938Sarybchik for (index = 0; index < sc->txq_count; index++) 1950227569Sphilip sum += *(unsigned long *)((caddr_t)sc->txq[index] + 1951227569Sphilip sfxge_tx_stats[id].offset); 1952227569Sphilip 1953272325Sgnn return (SYSCTL_OUT(req, &sum, sizeof(sum))); 1954227569Sphilip} 1955227569Sphilip 1956227569Sphilipstatic void 1957227569Sphilipsfxge_tx_stat_init(struct sfxge_softc *sc) 1958227569Sphilip{ 1959227569Sphilip struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1960227569Sphilip struct sysctl_oid_list *stat_list; 1961227569Sphilip unsigned int id; 1962227569Sphilip 1963227569Sphilip stat_list = SYSCTL_CHILDREN(sc->stats_node); 1964227569Sphilip 1965279077Sarybchik for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1966227569Sphilip SYSCTL_ADD_PROC( 1967227569Sphilip ctx, stat_list, 1968227569Sphilip OID_AUTO, sfxge_tx_stats[id].name, 1969227569Sphilip CTLTYPE_ULONG|CTLFLAG_RD, 1970227569Sphilip sc, id, sfxge_tx_stat_handler, "LU", 1971227569Sphilip ""); 1972227569Sphilip } 1973227569Sphilip} 1974227569Sphilip 1975279184Sarybchikuint64_t 1976279184Sarybchiksfxge_tx_get_drops(struct sfxge_softc *sc) 1977279184Sarybchik{ 1978279184Sarybchik unsigned int index; 1979279184Sarybchik uint64_t drops = 0; 1980279184Sarybchik struct sfxge_txq *txq; 1981279184Sarybchik 1982279184Sarybchik /* Sum across all TX queues */ 1983279184Sarybchik for (index = 0; index < sc->txq_count; index++) { 1984279184Sarybchik txq = sc->txq[index]; 1985279184Sarybchik /* 1986279184Sarybchik * In theory, txq->put_overflow and txq->netdown_drops 1987279184Sarybchik * should use atomic operation and other should be 1988279184Sarybchik * obtained under txq lock, but it is just statistics. 1989279184Sarybchik */ 1990279184Sarybchik drops += txq->drops + txq->get_overflow + 1991279184Sarybchik txq->get_non_tcp_overflow + 1992279184Sarybchik txq->put_overflow + txq->netdown_drops + 1993279184Sarybchik txq->tso_pdrop_too_many + txq->tso_pdrop_no_rsrc; 1994279184Sarybchik } 1995279184Sarybchik return (drops); 1996279184Sarybchik} 1997279184Sarybchik 1998227569Sphilipvoid 1999227569Sphilipsfxge_tx_fini(struct sfxge_softc *sc) 2000227569Sphilip{ 2001227569Sphilip int index; 2002227569Sphilip 2003278938Sarybchik index = sc->txq_count; 2004227569Sphilip while (--index >= 0) 2005278938Sarybchik sfxge_tx_qfini(sc, index); 2006227569Sphilip 2007278938Sarybchik sc->txq_count = 0; 2008227569Sphilip} 2009227569Sphilip 2010227569Sphilip 2011227569Sphilipint 2012227569Sphilipsfxge_tx_init(struct sfxge_softc *sc) 2013227569Sphilip{ 2014283514Sarybchik const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp); 2015227569Sphilip struct sfxge_intr *intr; 2016227569Sphilip int index; 2017227569Sphilip int rc; 2018227569Sphilip 2019227569Sphilip intr = &sc->intr; 2020227569Sphilip 2021227569Sphilip KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 2022227569Sphilip ("intr->state != SFXGE_INTR_INITIALIZED")); 2023227569Sphilip 2024311029Sarybchik if (sfxge_tx_dpl_get_max <= 0) { 2025311029Sarybchik log(LOG_ERR, "%s=%d must be greater than 0", 2026311029Sarybchik SFXGE_PARAM_TX_DPL_GET_MAX, sfxge_tx_dpl_get_max); 2027311029Sarybchik rc = EINVAL; 2028311029Sarybchik goto fail_tx_dpl_get_max; 2029311029Sarybchik } 2030311029Sarybchik if (sfxge_tx_dpl_get_non_tcp_max <= 0) { 2031311029Sarybchik log(LOG_ERR, "%s=%d must be greater than 0", 2032311029Sarybchik SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, 2033311029Sarybchik sfxge_tx_dpl_get_non_tcp_max); 2034311029Sarybchik rc = EINVAL; 2035311029Sarybchik goto fail_tx_dpl_get_non_tcp_max; 2036311029Sarybchik } 2037311029Sarybchik if (sfxge_tx_dpl_put_max < 0) { 2038311029Sarybchik log(LOG_ERR, "%s=%d must be greater or equal to 0", 2039311029Sarybchik SFXGE_PARAM_TX_DPL_PUT_MAX, sfxge_tx_dpl_put_max); 2040311029Sarybchik rc = EINVAL; 2041311029Sarybchik goto fail_tx_dpl_put_max; 2042311029Sarybchik } 2043311029Sarybchik 2044342454Sarybchik sc->txq_count = SFXGE_EVQ0_N_TXQ(sc) - 1 + sc->intr.n_alloc; 2045278938Sarybchik 2046283514Sarybchik sc->tso_fw_assisted = sfxge_tso_fw_assisted; 2047294077Sarybchik if ((~encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO) || 2048294077Sarybchik (!encp->enc_fw_assisted_tso_enabled)) 2049294077Sarybchik sc->tso_fw_assisted &= ~SFXGE_FATSOV1; 2050294077Sarybchik if ((~encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO_V2) || 2051294077Sarybchik (!encp->enc_fw_assisted_tso_v2_enabled)) 2052294077Sarybchik sc->tso_fw_assisted &= ~SFXGE_FATSOV2; 2053283514Sarybchik 2054272330Sgnn sc->txqs_node = SYSCTL_ADD_NODE( 2055272330Sgnn device_get_sysctl_ctx(sc->dev), 2056272330Sgnn SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), 2057272330Sgnn OID_AUTO, "txq", CTLFLAG_RD, NULL, "Tx queues"); 2058272330Sgnn if (sc->txqs_node == NULL) { 2059272330Sgnn rc = ENOMEM; 2060272330Sgnn goto fail_txq_node; 2061272330Sgnn } 2062272330Sgnn 2063227569Sphilip /* Initialize the transmit queues */ 2064342455Sarybchik if (sc->txq_dynamic_cksum_toggle_supported == B_FALSE) { 2065342455Sarybchik if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NON_CKSUM, 2066342455Sarybchik SFXGE_TXQ_NON_CKSUM, 0)) != 0) 2067342455Sarybchik goto fail; 2068227569Sphilip 2069342455Sarybchik if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_CKSUM, 2070342455Sarybchik SFXGE_TXQ_IP_CKSUM, 0)) != 0) 2071342455Sarybchik goto fail2; 2072342455Sarybchik } 2073227569Sphilip 2074278938Sarybchik for (index = 0; 2075342454Sarybchik index < sc->txq_count - SFXGE_EVQ0_N_TXQ(sc) + 1; 2076278938Sarybchik index++) { 2077342454Sarybchik if ((rc = sfxge_tx_qinit(sc, SFXGE_EVQ0_N_TXQ(sc) - 1 + index, 2078227569Sphilip SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0) 2079227569Sphilip goto fail3; 2080227569Sphilip } 2081227569Sphilip 2082227569Sphilip sfxge_tx_stat_init(sc); 2083227569Sphilip 2084227569Sphilip return (0); 2085227569Sphilip 2086227569Sphilipfail3: 2087227569Sphilip while (--index >= 0) 2088227569Sphilip sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 2089227569Sphilip 2090278938Sarybchik sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM); 2091278938Sarybchik 2092227569Sphilipfail2: 2093227569Sphilip sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM); 2094227569Sphilip 2095227569Sphilipfail: 2096272330Sgnnfail_txq_node: 2097278938Sarybchik sc->txq_count = 0; 2098311029Sarybchikfail_tx_dpl_put_max: 2099311029Sarybchikfail_tx_dpl_get_non_tcp_max: 2100311029Sarybchikfail_tx_dpl_get_max: 2101227569Sphilip return (rc); 2102227569Sphilip} 2103