1 /*- 2 * Copyright (c) 2016 Solarflare Communications Inc. 3 * All rights reserved. 4 * 5 * This software was jointly developed between OKTET Labs (under contract 6 * for Solarflare) and 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 are met: 10 * 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. 16 * 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. 28 */ 29 30 #ifndef _SFC_EV_H_ 31 #define _SFC_EV_H_ 32 33 #include "efx.h" 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* Number of entries in the management event queue */ 40 #define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS) 41 42 struct sfc_adapter; 43 struct sfc_rxq; 44 struct sfc_txq; 45 46 enum sfc_evq_state { 47 SFC_EVQ_UNINITIALIZED = 0, 48 SFC_EVQ_INITIALIZED, 49 SFC_EVQ_STARTING, 50 SFC_EVQ_STARTED, 51 52 SFC_EVQ_NSTATES 53 }; 54 55 struct sfc_evq { 56 /* Used on datapath */ 57 efx_evq_t *common; 58 unsigned int read_ptr; 59 boolean_t exception; 60 efsys_mem_t mem; 61 struct sfc_rxq *rxq; 62 struct sfc_txq *txq; 63 64 /* Not used on datapath */ 65 struct sfc_adapter *sa; 66 unsigned int evq_index; 67 enum sfc_evq_state init_state; 68 }; 69 70 struct sfc_evq_info { 71 /* Maximum number of EVQ entries taken into account when buffer 72 * table space is allocated. 73 */ 74 unsigned int max_entries; 75 /* Real number of EVQ entries, less or equal to max_entries */ 76 unsigned int entries; 77 /* NUMA-aware EVQ data structure used on datapath */ 78 struct sfc_evq *evq; 79 }; 80 81 /* 82 * Functions below define event queue to transmit/receive queue and vice 83 * versa mapping. 84 */ 85 86 static inline unsigned int 87 sfc_ev_qcount(struct sfc_adapter *sa) 88 { 89 const struct rte_eth_dev_data *dev_data = sa->eth_dev->data; 90 91 /* 92 * One management EVQ for global events. 93 * Own EVQ for each Tx and Rx queue. 94 */ 95 return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues; 96 } 97 98 static inline unsigned int 99 sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index) 100 { 101 unsigned int max_entries; 102 103 if (sw_index == sa->mgmt_evq_index) 104 max_entries = SFC_MGMT_EVQ_ENTRIES; 105 else if (sw_index <= sa->eth_dev->data->nb_rx_queues) 106 max_entries = EFX_RXQ_MAXNDESCS; 107 else 108 max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs; 109 110 return max_entries; 111 } 112 113 static inline unsigned int 114 sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa, 115 unsigned int rxq_sw_index) 116 { 117 return 1 + rxq_sw_index; 118 } 119 120 static inline unsigned int 121 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index) 122 { 123 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index; 124 } 125 126 int sfc_ev_init(struct sfc_adapter *sa); 127 void sfc_ev_fini(struct sfc_adapter *sa); 128 int sfc_ev_start(struct sfc_adapter *sa); 129 void sfc_ev_stop(struct sfc_adapter *sa); 130 131 int sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index, 132 unsigned int entries, int socket_id); 133 void sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index); 134 int sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index); 135 void sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index); 136 137 int sfc_ev_qprime(struct sfc_evq *evq); 138 void sfc_ev_qpoll(struct sfc_evq *evq); 139 140 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa); 141 142 #ifdef __cplusplus 143 } 144 #endif 145 #endif /* _SFC_EV_H_ */ 146