drivers/net/ethernet/huawei/hinic/hinic_hw_qp.h

   1 /*
   2  * Huawei HiNIC PCI Express Linux driver
   3  * Copyright(c) 2017 Huawei Technologies Co., Ltd
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  */
  15
  16 #ifndef HINIC_HW_QP_H
  17 #define HINIC_HW_QP_H
  18
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/sizes.h>
  22 #include <linux/pci.h>
  23 #include <linux/skbuff.h>
  24
  25 #include "hinic_common.h"
  26 #include "hinic_hw_if.h"
  27 #include "hinic_hw_wqe.h"
  28 #include "hinic_hw_wq.h"
  29 #include "hinic_hw_qp_ctxt.h"
  30
  31 #define HINIC_SQ_DB_INFO_PI_HI_SHIFT            0
  32 #define HINIC_SQ_DB_INFO_QID_SHIFT              8
  33 #define HINIC_SQ_DB_INFO_PATH_SHIFT             23
  34 #define HINIC_SQ_DB_INFO_COS_SHIFT              24
  35 #define HINIC_SQ_DB_INFO_TYPE_SHIFT             27
  36
  37 #define HINIC_SQ_DB_INFO_PI_HI_MASK             0xFF
  38 #define HINIC_SQ_DB_INFO_QID_MASK               0x3FF
  39 #define HINIC_SQ_DB_INFO_PATH_MASK              0x1
  40 #define HINIC_SQ_DB_INFO_COS_MASK               0x7
  41 #define HINIC_SQ_DB_INFO_TYPE_MASK              0x1F
  42
  43 #define HINIC_SQ_DB_INFO_SET(val, member)       \
  44                 (((u32)(val) & HINIC_SQ_DB_INFO_##member##_MASK) \
  45                  << HINIC_SQ_DB_INFO_##member##_SHIFT)
  46
  47 #define HINIC_SQ_WQEBB_SIZE                     64
  48 #define HINIC_RQ_WQEBB_SIZE                     32
  49
  50 #define HINIC_SQ_PAGE_SIZE                      SZ_4K
  51 #define HINIC_RQ_PAGE_SIZE                      SZ_4K
  52
  53 #define HINIC_SQ_DEPTH                          SZ_4K
  54 #define HINIC_RQ_DEPTH                          SZ_4K
  55
  56 /* In any change to HINIC_RX_BUF_SZ, HINIC_RX_BUF_SZ_IDX must be changed */
  57 #define HINIC_RX_BUF_SZ                         2048
  58 #define HINIC_RX_BUF_SZ_IDX                     HINIC_RX_BUF_SZ_2048_IDX
  59
  60 #define HINIC_MIN_TX_WQE_SIZE(wq)               \
  61                 ALIGN(HINIC_SQ_WQE_SIZE(1), (wq)->wqebb_size)
  62
  63 #define HINIC_MIN_TX_NUM_WQEBBS(sq)             \
  64                 (HINIC_MIN_TX_WQE_SIZE((sq)->wq) / (sq)->wq->wqebb_size)
  65
  66 enum hinic_rx_buf_sz_idx {
  67         HINIC_RX_BUF_SZ_32_IDX,
  68         HINIC_RX_BUF_SZ_64_IDX,
  69         HINIC_RX_BUF_SZ_96_IDX,
  70         HINIC_RX_BUF_SZ_128_IDX,
  71         HINIC_RX_BUF_SZ_192_IDX,
  72         HINIC_RX_BUF_SZ_256_IDX,
  73         HINIC_RX_BUF_SZ_384_IDX,
  74         HINIC_RX_BUF_SZ_512_IDX,
  75         HINIC_RX_BUF_SZ_768_IDX,
  76         HINIC_RX_BUF_SZ_1024_IDX,
  77         HINIC_RX_BUF_SZ_1536_IDX,
  78         HINIC_RX_BUF_SZ_2048_IDX,
  79         HINIC_RX_BUF_SZ_3072_IDX,
  80         HINIC_RX_BUF_SZ_4096_IDX,
  81         HINIC_RX_BUF_SZ_8192_IDX,
  82         HINIC_RX_BUF_SZ_16384_IDX,
  83 };
  84
  85 struct hinic_sq {
  86         struct hinic_hwif       *hwif;
  87
  88         struct hinic_wq         *wq;
  89
  90         u32                     irq;
  91         u16                     msix_entry;
  92
  93         void                    *hw_ci_addr;
  94         dma_addr_t              hw_ci_dma_addr;
  95
  96         void __iomem            *db_base;
  97
  98         struct sk_buff          **saved_skb;
  99 };
 100
 101 struct hinic_rq {
 102         struct hinic_hwif       *hwif;
 103
 104         struct hinic_wq         *wq;
 105
 106         u32                     irq;
 107         u16                     msix_entry;
 108
 109         size_t                  buf_sz;
 110
 111         struct sk_buff          **saved_skb;
 112
 113         struct hinic_rq_cqe     **cqe;
 114         dma_addr_t              *cqe_dma;
 115
 116         u16                     *pi_virt_addr;
 117         dma_addr_t              pi_dma_addr;
 118 };
 119
 120 struct hinic_qp {
 121         struct hinic_sq         sq;
 122         struct hinic_rq         rq;
 123
 124         u16     q_id;
 125 };
 126
 127 void hinic_qp_prepare_header(struct hinic_qp_ctxt_header *qp_ctxt_hdr,
 128                              enum hinic_qp_ctxt_type ctxt_type,
 129                              u16 num_queues, u16 max_queues);
 130
 131 void hinic_sq_prepare_ctxt(struct hinic_sq_ctxt *sq_ctxt,
 132                            struct hinic_sq *sq, u16 global_qid);
 133
 134 void hinic_rq_prepare_ctxt(struct hinic_rq_ctxt *rq_ctxt,
 135                            struct hinic_rq *rq, u16 global_qid);
 136
 137 int hinic_init_sq(struct hinic_sq *sq, struct hinic_hwif *hwif,
 138                   struct hinic_wq *wq, struct msix_entry *entry, void *ci_addr,
 139                   dma_addr_t ci_dma_addr, void __iomem *db_base);
 140
 141 void hinic_clean_sq(struct hinic_sq *sq);
 142
 143 int hinic_init_rq(struct hinic_rq *rq, struct hinic_hwif *hwif,
 144                   struct hinic_wq *wq, struct msix_entry *entry);
 145
 146 void hinic_clean_rq(struct hinic_rq *rq);
 147
 148 int hinic_get_sq_free_wqebbs(struct hinic_sq *sq);
 149
 150 int hinic_get_rq_free_wqebbs(struct hinic_rq *rq);
 151
 152 void hinic_sq_prepare_wqe(struct hinic_sq *sq, u16 prod_idx,
 153                           struct hinic_sq_wqe *wqe, struct hinic_sge *sges,
 154                           int nr_sges);
 155
 156 void hinic_sq_write_db(struct hinic_sq *sq, u16 prod_idx, unsigned int wqe_size,
 157                        unsigned int cos);
 158
 159 struct hinic_sq_wqe *hinic_sq_get_wqe(struct hinic_sq *sq,
 160                                       unsigned int wqe_size, u16 *prod_idx);
 161
 162 void hinic_sq_write_wqe(struct hinic_sq *sq, u16 prod_idx,
 163                         struct hinic_sq_wqe *wqe, struct sk_buff *skb,
 164                         unsigned int wqe_size);
 165
 166 struct hinic_sq_wqe *hinic_sq_read_wqe(struct hinic_sq *sq,
 167                                        struct sk_buff **skb,
 168                                        unsigned int *wqe_size, u16 *cons_idx);
 169
 170 void hinic_sq_put_wqe(struct hinic_sq *sq, unsigned int wqe_size);
 171
 172 void hinic_sq_get_sges(struct hinic_sq_wqe *wqe, struct hinic_sge *sges,
 173                        int nr_sges);
 174
 175 struct hinic_rq_wqe *hinic_rq_get_wqe(struct hinic_rq *rq,
 176                                       unsigned int wqe_size, u16 *prod_idx);
 177
 178 void hinic_rq_write_wqe(struct hinic_rq *rq, u16 prod_idx,
 179                         struct hinic_rq_wqe *wqe, struct sk_buff *skb);
 180
 181 struct hinic_rq_wqe *hinic_rq_read_wqe(struct hinic_rq *rq,
 182                                        unsigned int wqe_size,
 183                                        struct sk_buff **skb, u16 *cons_idx);
 184
 185 struct hinic_rq_wqe *hinic_rq_read_next_wqe(struct hinic_rq *rq,
 186                                             unsigned int wqe_size,
 187                                             struct sk_buff **skb,
 188                                             u16 *cons_idx);
 189
 190 void hinic_rq_put_wqe(struct hinic_rq *rq, u16 cons_idx,
 191                       unsigned int wqe_size);
 192
 193 void hinic_rq_get_sge(struct hinic_rq *rq, struct hinic_rq_wqe *wqe,
 194                       u16 cons_idx, struct hinic_sge *sge);
 195
 196 void hinic_rq_prepare_wqe(struct hinic_rq *rq, u16 prod_idx,
 197                           struct hinic_rq_wqe *wqe, struct hinic_sge *sge);
 198
 199 void hinic_rq_update(struct hinic_rq *rq, u16 prod_idx);
 200
 201 #endif