drivers/net/vmxnet3/vmxnet3_ring.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _VMXNET3_RING_H_
  35 #define _VMXNET3_RING_H_
  36
  37 #define VMXNET3_RX_CMDRING_SIZE 2
  38
  39 #define VMXNET3_DRIVER_VERSION_NUM 0x01012000
  40
  41 /* Default ring size */
  42 #define VMXNET3_DEF_TX_RING_SIZE 512
  43 #define VMXNET3_DEF_RX_RING_SIZE 128
  44
  45 #define VMXNET3_SUCCESS 0
  46 #define VMXNET3_FAIL   -1
  47
  48 #define TRUE  1
  49 #define FALSE 0
  50
  51
  52 typedef struct vmxnet3_buf_info {
  53         uint16_t               len;
  54         struct rte_mbuf        *m;
  55         uint64_t               bufPA;
  56 } vmxnet3_buf_info_t;
  57
  58 typedef struct vmxnet3_cmd_ring {
  59         vmxnet3_buf_info_t     *buf_info;
  60         uint32_t               size;
  61         uint32_t               next2fill;
  62         uint32_t               next2comp;
  63         uint8_t                gen;
  64         uint8_t                rid;
  65         Vmxnet3_GenericDesc    *base;
  66         uint64_t               basePA;
  67 } vmxnet3_cmd_ring_t;
  68
  69 static inline void
  70 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
  71 {
  72         ring->next2fill++;
  73         if (unlikely(ring->next2fill == ring->size)) {
  74                 ring->next2fill = 0;
  75                 ring->gen = (uint8_t)(ring->gen ^ 1);
  76         }
  77 }
  78
  79 static inline void
  80 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
  81 {
  82         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
  83 }
  84
  85 static inline uint32_t
  86 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
  87 {
  88         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
  89                    ring->next2comp - ring->next2fill - 1;
  90 }
  91
  92 static inline bool
  93 vmxnet3_cmd_ring_desc_empty(struct vmxnet3_cmd_ring *ring)
  94 {
  95         return ring->next2comp == ring->next2fill;
  96 }
  97
  98 typedef struct vmxnet3_comp_ring {
  99         uint32_t               size;
 100         uint32_t               next2proc;
 101         uint8_t                gen;
 102         uint8_t                intr_idx;
 103         Vmxnet3_GenericDesc    *base;
 104         uint64_t               basePA;
 105 } vmxnet3_comp_ring_t;
 106
 107 struct vmxnet3_data_ring {
 108         struct Vmxnet3_TxDataDesc *base;
 109         uint32_t                  size;
 110         uint64_t                  basePA;
 111 };
 112
 113 static inline void
 114 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 115 {
 116         ring->next2proc++;
 117         if (unlikely(ring->next2proc == ring->size)) {
 118                 ring->next2proc = 0;
 119                 ring->gen = (uint8_t)(ring->gen ^ 1);
 120         }
 121 }
 122
 123 struct vmxnet3_txq_stats {
 124         uint64_t        drop_total; /* # of pkts dropped by the driver,
 125                                      * the counters below track droppings due to
 126                                      * different reasons
 127                                      */
 128         uint64_t        drop_too_many_segs;
 129         uint64_t        drop_tso;
 130         uint64_t        tx_ring_full;
 131 };
 132
 133 typedef struct vmxnet3_tx_queue {
 134         struct vmxnet3_hw            *hw;
 135         struct vmxnet3_cmd_ring      cmd_ring;
 136         struct vmxnet3_comp_ring     comp_ring;
 137         struct vmxnet3_data_ring     data_ring;
 138         uint32_t                     qid;
 139         struct Vmxnet3_TxQueueDesc   *shared;
 140         struct vmxnet3_txq_stats     stats;
 141         bool                         stopped;
 142         uint16_t                     queue_id;      /**< Device TX queue index. */
 143         uint8_t                      port_id;       /**< Device port identifier. */
 144 } vmxnet3_tx_queue_t;
 145
 146 struct vmxnet3_rxq_stats {
 147         uint64_t                     drop_total;
 148         uint64_t                     drop_err;
 149         uint64_t                     drop_fcs;
 150         uint64_t                     rx_buf_alloc_failure;
 151 };
 152
 153 typedef struct vmxnet3_rx_queue {
 154         struct rte_mempool          *mp;
 155         struct vmxnet3_hw           *hw;
 156         struct vmxnet3_cmd_ring     cmd_ring[VMXNET3_RX_CMDRING_SIZE];
 157         struct vmxnet3_comp_ring    comp_ring;
 158         uint32_t                    qid1;
 159         uint32_t                    qid2;
 160         Vmxnet3_RxQueueDesc         *shared;
 161         struct rte_mbuf             *start_seg;
 162         struct rte_mbuf             *last_seg;
 163         struct vmxnet3_rxq_stats    stats;
 164         bool                        stopped;
 165         uint16_t                    queue_id;      /**< Device RX queue index. */
 166         uint8_t                     port_id;       /**< Device port identifier. */
 167 } vmxnet3_rx_queue_t;
 168
 169 #endif /* _VMXNET3_RING_H_ */