9a75f75cb1
The event queue is required for device level events (e.g. link status change) and flush events. Provide thread-safe function to poll the event queue since it may be really done from different contexts. Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com> Reviewed-by: Andy Moreton <amoreton@solarflare.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/*-
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* Copyright (c) 2016 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_EV_H_
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#define _SFC_EV_H_
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#include "efx.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Number of entries in the management event queue */
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#define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS)
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struct sfc_adapter;
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enum sfc_evq_state {
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SFC_EVQ_UNINITIALIZED = 0,
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SFC_EVQ_INITIALIZED,
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SFC_EVQ_STARTING,
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SFC_EVQ_STARTED,
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SFC_EVQ_NSTATES
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};
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struct sfc_evq {
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/* Used on datapath */
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efx_evq_t *common;
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unsigned int read_ptr;
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boolean_t exception;
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efsys_mem_t mem;
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/* Not used on datapath */
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struct sfc_adapter *sa;
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unsigned int evq_index;
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enum sfc_evq_state init_state;
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};
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struct sfc_evq_info {
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/* Maximum number of EVQ entries taken into account when buffer
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* table space is allocated.
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*/
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unsigned int max_entries;
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/* Real number of EVQ entries, less or equal to max_entries */
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unsigned int entries;
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/* NUMA-aware EVQ data structure used on datapath */
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struct sfc_evq *evq;
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};
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/*
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* Functions below define event queue to transmit/receive queue and vice
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* versa mapping.
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*/
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static inline unsigned int
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sfc_ev_qcount(struct sfc_adapter *sa)
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{
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const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
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/*
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* One management EVQ for global events.
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* Own EVQ for each Tx and Rx queue.
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*/
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return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues;
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}
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static inline unsigned int
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sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index)
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{
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unsigned int max_entries;
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if (sw_index == sa->mgmt_evq_index)
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max_entries = SFC_MGMT_EVQ_ENTRIES;
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else if (sw_index <= sa->eth_dev->data->nb_rx_queues)
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max_entries = EFX_RXQ_MAXNDESCS;
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else
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max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs;
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return max_entries;
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}
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static inline unsigned int
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sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa,
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unsigned int rxq_sw_index)
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{
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return 1 + rxq_sw_index;
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}
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static inline unsigned int
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sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
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{
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return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
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}
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int sfc_ev_init(struct sfc_adapter *sa);
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void sfc_ev_fini(struct sfc_adapter *sa);
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int sfc_ev_start(struct sfc_adapter *sa);
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void sfc_ev_stop(struct sfc_adapter *sa);
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int sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
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unsigned int entries, int socket_id);
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void sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index);
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int sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index);
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void sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index);
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int sfc_ev_qprime(struct sfc_evq *evq);
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void sfc_ev_qpoll(struct sfc_evq *evq);
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void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SFC_EV_H_ */
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