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.
35 #include <rte_ethdev.h>
45 /* Number of entries in the management event queue */
46 #define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS)
53 SFC_EVQ_UNINITIALIZED = 0,
62 /* Used on datapath */
64 const efx_ev_callbacks_t *callbacks;
65 unsigned int read_ptr;
68 struct sfc_dp_rxq *dp_rxq;
69 struct sfc_dp_txq *dp_txq;
71 /* Not used on datapath */
72 struct sfc_adapter *sa;
73 unsigned int evq_index;
74 enum sfc_evq_state init_state;
78 /* Maximum number of EVQ entries taken into account when buffer
79 * table space is allocated.
81 unsigned int max_entries;
82 /* Real number of EVQ entries, less or equal to max_entries */
84 /* Event queue creation flags */
86 /* NUMA-aware EVQ data structure used on datapath */
91 * Functions below define event queue to transmit/receive queue and vice
95 static inline unsigned int
96 sfc_ev_qcount(struct sfc_adapter *sa)
98 const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
101 * One management EVQ for global events.
102 * Own EVQ for each Tx and Rx queue.
104 return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues;
107 static inline unsigned int
108 sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index)
110 unsigned int max_entries;
112 if (sw_index == sa->mgmt_evq_index)
113 max_entries = SFC_MGMT_EVQ_ENTRIES;
114 else if (sw_index <= sa->eth_dev->data->nb_rx_queues)
115 max_entries = EFX_RXQ_MAXNDESCS;
117 max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs;
122 static inline unsigned int
123 sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa,
124 unsigned int rxq_sw_index)
126 return 1 + rxq_sw_index;
129 static inline unsigned int
130 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
132 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
135 int sfc_ev_init(struct sfc_adapter *sa);
136 void sfc_ev_fini(struct sfc_adapter *sa);
137 int sfc_ev_start(struct sfc_adapter *sa);
138 void sfc_ev_stop(struct sfc_adapter *sa);
140 int sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
141 unsigned int entries, int socket_id);
142 void sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index);
143 int sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index);
144 void sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index);
146 int sfc_ev_qprime(struct sfc_evq *evq);
147 void sfc_ev_qpoll(struct sfc_evq *evq);
149 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa);
154 #endif /* _SFC_EV_H_ */