ceph/src/dpdk/drivers/net/enic/base/vnic_rq.h

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #ifndef _VNIC_RQ_H_
  36 #define _VNIC_RQ_H_
  37
  38
  39 #include "vnic_dev.h"
  40 #include "vnic_cq.h"
  41
  42 /* Receive queue control */
  43 struct vnic_rq_ctrl {
  44         u64 ring_base;                  /* 0x00 */
  45         u32 ring_size;                  /* 0x08 */
  46         u32 pad0;
  47         u32 posted_index;               /* 0x10 */
  48         u32 pad1;
  49         u32 cq_index;                   /* 0x18 */
  50         u32 pad2;
  51         u32 enable;                     /* 0x20 */
  52         u32 pad3;
  53         u32 running;                    /* 0x28 */
  54         u32 pad4;
  55         u32 fetch_index;                /* 0x30 */
  56         u32 pad5;
  57         u32 error_interrupt_enable;     /* 0x38 */
  58         u32 pad6;
  59         u32 error_interrupt_offset;     /* 0x40 */
  60         u32 pad7;
  61         u32 error_status;               /* 0x48 */
  62         u32 pad8;
  63         u32 tcp_sn;                     /* 0x50 */
  64         u32 pad9;
  65         u32 unused;                     /* 0x58 */
  66         u32 pad10;
  67         u32 dca_select;                 /* 0x60 */
  68         u32 pad11;
  69         u32 dca_value;                  /* 0x68 */
  70         u32 pad12;
  71         u32 data_ring;                  /* 0x70 */
  72         u32 pad13;
  73         u32 header_split;               /* 0x78 */
  74         u32 pad14;
  75 };
  76
  77 struct vnic_rq {
  78         unsigned int index;
  79         unsigned int posted_index;
  80         struct vnic_dev *vdev;
  81         struct vnic_rq_ctrl __iomem *ctrl;      /* memory-mapped */
  82         struct vnic_dev_ring ring;
  83         struct rte_mbuf **mbuf_ring;            /* array of allocated mbufs */
  84         unsigned int mbuf_next_idx;             /* next mb to consume */
  85         void *os_buf_head;
  86         unsigned int pkts_outstanding;
  87         uint16_t rx_nb_hold;
  88         uint16_t rx_free_thresh;
  89         unsigned int socket_id;
  90         struct rte_mempool *mp;
  91         uint16_t rxst_idx;
  92         uint32_t tot_pkts;
  93         uint16_t data_queue_idx;
  94         uint8_t data_queue_enable;
  95         uint8_t is_sop;
  96         uint8_t in_use;
  97         struct rte_mbuf *pkt_first_seg;
  98         struct rte_mbuf *pkt_last_seg;
  99         unsigned int max_mbufs_per_pkt;
 100         uint16_t tot_nb_desc;
 101 };
 102
 103 static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
 104 {
 105         /* how many does SW own? */
 106         return rq->ring.desc_avail;
 107 }
 108
 109 static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
 110 {
 111         /* how many does HW own? */
 112         return rq->ring.desc_count - rq->ring.desc_avail - 1;
 113 }
 114
 115
 116
 117 enum desc_return_options {
 118         VNIC_RQ_RETURN_DESC,
 119         VNIC_RQ_DEFER_RETURN_DESC,
 120 };
 121
 122 static inline int vnic_rq_fill(struct vnic_rq *rq,
 123         int (*buf_fill)(struct vnic_rq *rq))
 124 {
 125         int err;
 126
 127         while (vnic_rq_desc_avail(rq) > 0) {
 128
 129                 err = (*buf_fill)(rq);
 130                 if (err)
 131                         return err;
 132         }
 133
 134         return 0;
 135 }
 136
 137 static inline int vnic_rq_fill_count(struct vnic_rq *rq,
 138         int (*buf_fill)(struct vnic_rq *rq), unsigned int count)
 139 {
 140         int err;
 141
 142         while ((vnic_rq_desc_avail(rq) > 0) && (count--)) {
 143
 144                 err = (*buf_fill)(rq);
 145                 if (err)
 146                         return err;
 147         }
 148
 149         return 0;
 150 }
 151
 152 void vnic_rq_free(struct vnic_rq *rq);
 153 int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
 154         unsigned int desc_count, unsigned int desc_size);
 155 void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
 156         unsigned int fetch_index, unsigned int posted_index,
 157         unsigned int error_interrupt_enable,
 158         unsigned int error_interrupt_offset);
 159 void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
 160         unsigned int error_interrupt_enable,
 161         unsigned int error_interrupt_offset);
 162 void vnic_rq_error_out(struct vnic_rq *rq, unsigned int error);
 163 unsigned int vnic_rq_error_status(struct vnic_rq *rq);
 164 void vnic_rq_enable(struct vnic_rq *rq);
 165 int vnic_rq_disable(struct vnic_rq *rq);
 166 void vnic_rq_clean(struct vnic_rq *rq,
 167         void (*buf_clean)(struct rte_mbuf **buf));
 168 #endif /* _VNIC_RQ_H_ */