2 * Copyright (c) 2016 Solarflare Communications Inc.
5 * This software was jointly developed between OKTET Labs (under contract
6 * for Solarflare) and Solarflare Communications, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <rte_ethdev.h>
43 * Estimated maximum number of segments that transmit packet consists of;
44 * it is determined with respect to the expectation of a packet to consist
45 * of a header plus a couple of data segments one of those crossing 4K page;
46 * it is used by transmit path to avoid redundant reaping and, thus,
47 * to avoid increase of latency
49 #define SFC_TX_MAX_PKT_DESC 4
52 * A segment must not cross 4K boundary
53 * (this is a requirement of NIC TX descriptors)
55 #define SFC_TX_SEG_BOUNDARY 4096
60 struct sfc_tx_sw_desc {
61 struct rte_mbuf *mbuf;
64 enum sfc_txq_state_bit {
65 SFC_TXQ_INITIALIZED_BIT = 0,
66 #define SFC_TXQ_INITIALIZED (1 << SFC_TXQ_INITIALIZED_BIT)
68 #define SFC_TXQ_STARTED (1 << SFC_TXQ_STARTED_BIT)
70 #define SFC_TXQ_RUNNING (1 << SFC_TXQ_RUNNING_BIT)
72 #define SFC_TXQ_FLUSHING (1 << SFC_TXQ_FLUSHING_BIT)
74 #define SFC_TXQ_FLUSHED (1 << SFC_TXQ_FLUSHED_BIT)
79 struct sfc_tx_sw_desc *sw_ring;
81 unsigned int ptr_mask;
82 efx_desc_t *pend_desc;
87 unsigned int completed;
89 unsigned int hw_index;
93 static inline unsigned int
94 sfc_txq_sw_index(const struct sfc_txq *txq)
100 unsigned int entries;
104 int sfc_tx_init(struct sfc_adapter *sa);
105 void sfc_tx_fini(struct sfc_adapter *sa);
107 int sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
108 uint16_t nb_tx_desc, unsigned int socket_id,
109 const struct rte_eth_txconf *tx_conf);
110 void sfc_tx_qfini(struct sfc_adapter *sa, unsigned int sw_index);
112 void sfc_tx_qflush_done(struct sfc_txq *txq);
113 int sfc_tx_qstart(struct sfc_adapter *sa, unsigned int sw_index);
114 void sfc_tx_qstop(struct sfc_adapter *sa, unsigned int sw_index);
115 int sfc_tx_start(struct sfc_adapter *sa);
116 void sfc_tx_stop(struct sfc_adapter *sa);
118 uint16_t sfc_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
124 #endif /* _SFC_TX_H */