dbdc82416b
Split control and datapath to make datapath substitutable and possibly reusable with alternative control path. libefx-based Tx datapath is bound to libefx control path, but it should be possible to use other datapaths with alternative control path(s). Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
165 lines
4.8 KiB
C
165 lines
4.8 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) 2016-2017 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was jointly developed between OKTET Labs (under contract
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* for Solarflare) and Solarflare Communications, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SFC_TX_H
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#define _SFC_TX_H
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#include <rte_mbuf.h>
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#include <rte_ethdev.h>
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#include "efx.h"
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#include "sfc_dp_tx.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct sfc_adapter;
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struct sfc_evq;
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/**
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* Software Tx descriptor information associated with hardware Tx
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* descriptor.
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*/
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struct sfc_efx_tx_sw_desc {
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struct rte_mbuf *mbuf;
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uint8_t *tsoh; /* Buffer to store TSO header */
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};
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enum sfc_txq_state_bit {
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SFC_TXQ_INITIALIZED_BIT = 0,
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#define SFC_TXQ_INITIALIZED (1 << SFC_TXQ_INITIALIZED_BIT)
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SFC_TXQ_STARTED_BIT,
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#define SFC_TXQ_STARTED (1 << SFC_TXQ_STARTED_BIT)
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SFC_TXQ_FLUSHING_BIT,
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#define SFC_TXQ_FLUSHING (1 << SFC_TXQ_FLUSHING_BIT)
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SFC_TXQ_FLUSHED_BIT,
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#define SFC_TXQ_FLUSHED (1 << SFC_TXQ_FLUSHED_BIT)
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};
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/**
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* Transmit queue control information. Not used on datapath.
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* Allocated on the socket specified on the queue setup.
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*/
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struct sfc_txq {
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unsigned int state;
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unsigned int hw_index;
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struct sfc_evq *evq;
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efsys_mem_t mem;
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struct sfc_dp_txq *dp;
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efx_txq_t *common;
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unsigned int free_thresh;
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unsigned int flags;
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};
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static inline unsigned int
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sfc_txq_sw_index_by_hw_index(unsigned int hw_index)
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{
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return hw_index;
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}
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static inline unsigned int
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sfc_txq_sw_index(const struct sfc_txq *txq)
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{
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return sfc_txq_sw_index_by_hw_index(txq->hw_index);
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}
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struct sfc_txq *sfc_txq_by_dp_txq(const struct sfc_dp_txq *dp_txq);
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/**
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* Transmit queue information used on libefx-based data path.
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* Allocated on the socket specified on the queue setup.
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*/
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struct sfc_efx_txq {
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struct sfc_evq *evq;
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struct sfc_efx_tx_sw_desc *sw_ring;
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unsigned int ptr_mask;
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efx_desc_t *pend_desc;
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efx_txq_t *common;
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unsigned int added;
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unsigned int pending;
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unsigned int completed;
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unsigned int free_thresh;
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uint16_t hw_vlan_tci;
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uint16_t dma_desc_size_max;
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unsigned int hw_index;
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unsigned int flags;
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#define SFC_EFX_TXQ_FLAG_STARTED 0x1
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#define SFC_EFX_TXQ_FLAG_RUNNING 0x2
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/* Datapath transmit queue anchor */
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struct sfc_dp_txq dp;
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};
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static inline struct sfc_efx_txq *
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sfc_efx_txq_by_dp_txq(struct sfc_dp_txq *dp_txq)
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{
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return container_of(dp_txq, struct sfc_efx_txq, dp);
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}
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struct sfc_txq_info {
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unsigned int entries;
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struct sfc_txq *txq;
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boolean_t deferred_start;
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boolean_t deferred_started;
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};
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int sfc_tx_init(struct sfc_adapter *sa);
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void sfc_tx_fini(struct sfc_adapter *sa);
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int sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
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uint16_t nb_tx_desc, unsigned int socket_id,
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const struct rte_eth_txconf *tx_conf);
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void sfc_tx_qfini(struct sfc_adapter *sa, unsigned int sw_index);
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void sfc_tx_qflush_done(struct sfc_txq *txq);
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int sfc_tx_qstart(struct sfc_adapter *sa, unsigned int sw_index);
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void sfc_tx_qstop(struct sfc_adapter *sa, unsigned int sw_index);
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int sfc_tx_start(struct sfc_adapter *sa);
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void sfc_tx_stop(struct sfc_adapter *sa);
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/* From 'sfc_tso.c' */
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int sfc_efx_tso_alloc_tsoh_objs(struct sfc_efx_tx_sw_desc *sw_ring,
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unsigned int txq_entries,
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unsigned int socket_id);
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void sfc_efx_tso_free_tsoh_objs(struct sfc_efx_tx_sw_desc *sw_ring,
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unsigned int txq_entries);
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int sfc_efx_tso_do(struct sfc_efx_txq *txq, unsigned int idx,
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struct rte_mbuf **in_seg, size_t *in_off, efx_desc_t **pend,
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unsigned int *pkt_descs, size_t *pkt_len);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SFC_TX_H */
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