ceph/src/seastar/dpdk/drivers/net/sfc/sfc_ev.h

   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_ */