4 * Copyright (c) 2016-2017 Solarflare Communications Inc.
7 * This software was jointly developed between OKTET Labs (under contract
8 * for Solarflare) and Solarflare Communications, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions are met:
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.
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.
41 /* Number of entries in the management event queue */
42 #define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS)
49 SFC_EVQ_UNINITIALIZED = 0,
58 /* Used on datapath */
60 unsigned int read_ptr;
66 /* Not used on datapath */
67 struct sfc_adapter *sa;
68 unsigned int evq_index;
69 enum sfc_evq_state init_state;
73 /* Maximum number of EVQ entries taken into account when buffer
74 * table space is allocated.
76 unsigned int max_entries;
77 /* Real number of EVQ entries, less or equal to max_entries */
79 /* Event queue creation flags */
81 /* NUMA-aware EVQ data structure used on datapath */
86 * Functions below define event queue to transmit/receive queue and vice
90 static inline unsigned int
91 sfc_ev_qcount(struct sfc_adapter *sa)
93 const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
96 * One management EVQ for global events.
97 * Own EVQ for each Tx and Rx queue.
99 return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues;
102 static inline unsigned int
103 sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index)
105 unsigned int max_entries;
107 if (sw_index == sa->mgmt_evq_index)
108 max_entries = SFC_MGMT_EVQ_ENTRIES;
109 else if (sw_index <= sa->eth_dev->data->nb_rx_queues)
110 max_entries = EFX_RXQ_MAXNDESCS;
112 max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs;
117 static inline unsigned int
118 sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa,
119 unsigned int rxq_sw_index)
121 return 1 + rxq_sw_index;
124 static inline unsigned int
125 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
127 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
130 int sfc_ev_init(struct sfc_adapter *sa);
131 void sfc_ev_fini(struct sfc_adapter *sa);
132 int sfc_ev_start(struct sfc_adapter *sa);
133 void sfc_ev_stop(struct sfc_adapter *sa);
135 int sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
136 unsigned int entries, int socket_id);
137 void sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index);
138 int sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index);
139 void sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index);
141 int sfc_ev_qprime(struct sfc_evq *evq);
142 void sfc_ev_qpoll(struct sfc_evq *evq);
144 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa);
149 #endif /* _SFC_EV_H_ */