sfxge_tx.h revision 279077
1/*- 2 * Copyright (c) 2010-2011 Solarflare Communications, Inc. 3 * All rights reserved. 4 * 5 * This software was developed in part by Philip Paeps under contract for 6 * Solarflare Communications, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/dev/sfxge/sfxge_tx.h 279077 2015-02-20 19:39:40Z arybchik $ 30 */ 31 32#ifndef _SFXGE_TX_H 33#define _SFXGE_TX_H 34 35#include <netinet/in.h> 36#include <netinet/ip.h> 37#include <netinet/tcp.h> 38 39/* Maximum number of DMA segments needed to map an mbuf chain. With 40 * TSO, the mbuf length may be just over 64K, divided into 2K mbuf 41 * clusters. (The chain could be longer than this initially, but can 42 * be shortened with m_collapse().) 43 */ 44#define SFXGE_TX_MAPPING_MAX_SEG (64 / 2 + 1) 45 46/* 47 * Buffer mapping flags. 48 * 49 * Buffers and DMA mappings must be freed when the last descriptor 50 * referring to them is completed. Set the TX_BUF_UNMAP and 51 * TX_BUF_MBUF flags on the last descriptor generated for an mbuf 52 * chain. Set only the TX_BUF_UNMAP flag on a descriptor referring to 53 * a heap buffer. 54 */ 55enum sfxge_tx_buf_flags { 56 TX_BUF_UNMAP = 1, 57 TX_BUF_MBUF = 2, 58}; 59 60/* 61 * Buffer mapping information for descriptors in flight. 62 */ 63struct sfxge_tx_mapping { 64 union { 65 struct mbuf *mbuf; 66 caddr_t heap_buf; 67 } u; 68 bus_dmamap_t map; 69 enum sfxge_tx_buf_flags flags; 70}; 71 72#define SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT (64 * 1024) 73#define SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT 1024 74#define SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT 64 75 76/* 77 * Deferred packet list. 78 */ 79struct sfxge_tx_dpl { 80 unsigned int std_get_max; /* Maximum number of packets 81 * in get list */ 82 unsigned int std_get_non_tcp_max; /* Maximum number 83 * of non-TCP packets 84 * in get list */ 85 unsigned int std_put_max; /* Maximum number of packets 86 * in put list */ 87 uintptr_t std_put; /* Head of put list. */ 88 struct mbuf *std_get; /* Head of get list. */ 89 struct mbuf **std_getp; /* Tail of get list. */ 90 unsigned int std_get_count; /* Packets in get list. */ 91 unsigned int std_get_non_tcp_count; /* Non-TCP packets 92 * in get list */ 93 unsigned int std_get_hiwat; /* Packets in get list 94 * high watermark */ 95}; 96 97 98#define SFXGE_TX_BUFFER_SIZE 0x400 99#define SFXGE_TX_HEADER_SIZE 0x100 100#define SFXGE_TX_COPY_THRESHOLD 0x200 101 102enum sfxge_txq_state { 103 SFXGE_TXQ_UNINITIALIZED = 0, 104 SFXGE_TXQ_INITIALIZED, 105 SFXGE_TXQ_STARTED 106}; 107 108enum sfxge_txq_type { 109 SFXGE_TXQ_NON_CKSUM = 0, 110 SFXGE_TXQ_IP_CKSUM, 111 SFXGE_TXQ_IP_TCP_UDP_CKSUM, 112 SFXGE_TXQ_NTYPES 113}; 114 115#define SFXGE_TXQ_UNBLOCK_LEVEL(_entries) (EFX_TXQ_LIMIT(_entries) / 4) 116 117#define SFXGE_TX_BATCH 64 118 119#ifdef SFXGE_HAVE_MQ 120#define SFXGE_TX_LOCK(txq) (&(txq)->lock) 121#else 122#define SFXGE_TX_LOCK(txq) (&(txq)->sc->tx_lock) 123#endif 124 125#define SFXGE_TXQ_LOCK_INIT(_txq, _ifname, _txq_index) \ 126 do { \ 127 struct sfxge_txq *__txq = (_txq); \ 128 \ 129 snprintf((__txq)->lock_name, \ 130 sizeof((__txq)->lock_name), \ 131 "%s:txq%u", (_ifname), (_txq_index)); \ 132 mtx_init(&(__txq)->lock, (__txq)->lock_name, \ 133 NULL, MTX_DEF); \ 134 } while (B_FALSE) 135#define SFXGE_TXQ_LOCK_DESTROY(_txq) \ 136 mtx_destroy(&(_txq)->lock) 137#define SFXGE_TXQ_LOCK(_txq) \ 138 mtx_lock(SFXGE_TX_LOCK(_txq)) 139#define SFXGE_TXQ_TRYLOCK(_txq) \ 140 mtx_trylock(SFXGE_TX_LOCK(_txq)) 141#define SFXGE_TXQ_UNLOCK(_txq) \ 142 mtx_unlock(SFXGE_TX_LOCK(_txq)) 143#define SFXGE_TXQ_LOCK_ASSERT_OWNED(_txq) \ 144 mtx_assert(SFXGE_TX_LOCK(_txq), MA_OWNED) 145 146 147struct sfxge_txq { 148 /* The following fields should be written very rarely */ 149 struct sfxge_softc *sc; 150 enum sfxge_txq_state init_state; 151 enum sfxge_flush_state flush_state; 152 enum sfxge_txq_type type; 153 unsigned int txq_index; 154 unsigned int evq_index; 155 efsys_mem_t mem; 156 unsigned int buf_base_id; 157 unsigned int entries; 158 unsigned int ptr_mask; 159 160 struct sfxge_tx_mapping *stmp; /* Packets in flight. */ 161 bus_dma_tag_t packet_dma_tag; 162 efx_buffer_t *pend_desc; 163 efx_txq_t *common; 164 165 efsys_mem_t *tsoh_buffer; 166 167 char lock_name[SFXGE_LOCK_NAME_MAX]; 168 169 /* This field changes more often and is read regularly on both 170 * the initiation and completion paths 171 */ 172 int blocked __aligned(CACHE_LINE_SIZE); 173 174 /* The following fields change more often, and are used mostly 175 * on the initiation path 176 */ 177#ifdef SFXGE_HAVE_MQ 178 struct mtx lock __aligned(CACHE_LINE_SIZE); 179 struct sfxge_tx_dpl dpl; /* Deferred packet list. */ 180 unsigned int n_pend_desc; 181#else 182 unsigned int n_pend_desc __aligned(CACHE_LINE_SIZE); 183#endif 184 unsigned int added; 185 unsigned int reaped; 186 /* Statistics */ 187 unsigned long tso_bursts; 188 unsigned long tso_packets; 189 unsigned long tso_long_headers; 190 unsigned long collapses; 191 unsigned long drops; 192 unsigned long get_overflow; 193 unsigned long get_non_tcp_overflow; 194 unsigned long put_overflow; 195 unsigned long netdown_drops; 196 unsigned long tso_pdrop_too_many; 197 unsigned long tso_pdrop_no_rsrc; 198 199 /* The following fields change more often, and are used mostly 200 * on the completion path 201 */ 202 unsigned int pending __aligned(CACHE_LINE_SIZE); 203 unsigned int completed; 204 struct sfxge_txq *next; 205}; 206 207struct sfxge_evq; 208 209extern int sfxge_tx_packet_add(struct sfxge_txq *, struct mbuf *); 210 211extern int sfxge_tx_init(struct sfxge_softc *sc); 212extern void sfxge_tx_fini(struct sfxge_softc *sc); 213extern int sfxge_tx_start(struct sfxge_softc *sc); 214extern void sfxge_tx_stop(struct sfxge_softc *sc); 215extern void sfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq); 216extern void sfxge_tx_qflush_done(struct sfxge_txq *txq); 217#ifdef SFXGE_HAVE_MQ 218extern void sfxge_if_qflush(struct ifnet *ifp); 219extern int sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m); 220#else 221extern void sfxge_if_start(struct ifnet *ifp); 222#endif 223 224#endif 225