1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) 2016-2017 Solarflare Communications Inc. 5 * All rights reserved. 6 * 7 * This software was jointly developed between OKTET Labs (under contract 8 * for Solarflare) and Solarflare Communications, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright notice, 14 * this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _SFC_EV_H_ 33 #define _SFC_EV_H_ 34 35 #include <rte_ethdev.h> 36 37 #include "efx.h" 38 39 #include "sfc.h" 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* Number of entries in the management event queue */ 46 #define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS) 47 48 struct sfc_adapter; 49 struct sfc_dp_rxq; 50 struct sfc_dp_txq; 51 52 enum sfc_evq_state { 53 SFC_EVQ_UNINITIALIZED = 0, 54 SFC_EVQ_INITIALIZED, 55 SFC_EVQ_STARTING, 56 SFC_EVQ_STARTED, 57 58 SFC_EVQ_NSTATES 59 }; 60 61 enum sfc_evq_type { 62 SFC_EVQ_TYPE_MGMT = 0, 63 SFC_EVQ_TYPE_RX, 64 SFC_EVQ_TYPE_TX, 65 66 SFC_EVQ_NTYPES 67 }; 68 69 struct sfc_evq { 70 /* Used on datapath */ 71 efx_evq_t *common; 72 const efx_ev_callbacks_t *callbacks; 73 unsigned int read_ptr; 74 boolean_t exception; 75 efsys_mem_t mem; 76 struct sfc_dp_rxq *dp_rxq; 77 struct sfc_dp_txq *dp_txq; 78 79 /* Not used on datapath */ 80 struct sfc_adapter *sa; 81 unsigned int evq_index; 82 enum sfc_evq_state init_state; 83 enum sfc_evq_type type; 84 unsigned int entries; 85 }; 86 87 /* 88 * Functions below define event queue to transmit/receive queue and vice 89 * versa mapping. 90 * Own event queue is allocated for management, each Rx and each Tx queue. 91 * Zero event queue is used for management events. 92 * Rx event queues from 1 to RxQ number follow management event queue. 93 * Tx event queues follow Rx event queues. 94 */ 95 96 static inline unsigned int 97 sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa, 98 unsigned int rxq_sw_index) 99 { 100 return 1 + rxq_sw_index; 101 } 102 103 static inline unsigned int 104 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index) 105 { 106 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index; 107 } 108 109 int sfc_ev_attach(struct sfc_adapter *sa); 110 void sfc_ev_detach(struct sfc_adapter *sa); 111 int sfc_ev_start(struct sfc_adapter *sa); 112 void sfc_ev_stop(struct sfc_adapter *sa); 113 114 int sfc_ev_qinit(struct sfc_adapter *sa, 115 enum sfc_evq_type type, unsigned int type_index, 116 unsigned int entries, int socket_id, struct sfc_evq **evqp); 117 void sfc_ev_qfini(struct sfc_evq *evq); 118 int sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index); 119 void sfc_ev_qstop(struct sfc_evq *evq); 120 121 int sfc_ev_qprime(struct sfc_evq *evq); 122 void sfc_ev_qpoll(struct sfc_evq *evq); 123 124 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa); 125 126 #ifdef __cplusplus 127 } 128 #endif 129 #endif /* _SFC_EV_H_ */ 130