2 * Copyright (c) 2016 Solarflare Communications Inc.
5 * This software was jointly developed between OKTET Labs (under contract
6 * for Solarflare) and Solarflare Communications, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
39 /* Number of entries in the management event queue */
40 #define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS)
47 SFC_EVQ_UNINITIALIZED = 0,
56 /* Used on datapath */
58 unsigned int read_ptr;
64 /* Not used on datapath */
65 struct sfc_adapter *sa;
66 unsigned int evq_index;
67 enum sfc_evq_state init_state;
71 /* Maximum number of EVQ entries taken into account when buffer
72 * table space is allocated.
74 unsigned int max_entries;
75 /* Real number of EVQ entries, less or equal to max_entries */
77 /* NUMA-aware EVQ data structure used on datapath */
82 * Functions below define event queue to transmit/receive queue and vice
86 static inline unsigned int
87 sfc_ev_qcount(struct sfc_adapter *sa)
89 const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
92 * One management EVQ for global events.
93 * Own EVQ for each Tx and Rx queue.
95 return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues;
98 static inline unsigned int
99 sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index)
101 unsigned int max_entries;
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;
108 max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs;
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)
117 return 1 + rxq_sw_index;
120 static inline unsigned int
121 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
123 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
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);
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);
137 int sfc_ev_qprime(struct sfc_evq *evq);
138 void sfc_ev_qpoll(struct sfc_evq *evq);
140 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa);
145 #endif /* _SFC_EV_H_ */