drivers/net/ethernet/mellanox/mlx5/core/wq.c

   1 /*
   2  * Copyright (c) 2013-2015, Mellanox Technologies, Ltd.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/mlx5/driver.h>
  34 #include "wq.h"
  35 #include "mlx5_core.h"
  36
  37 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
  38 {
  39         return (u32)wq->sz_m1 + 1;
  40 }
  41
  42 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
  43 {
  44         return wq->sz_m1 + 1;
  45 }
  46
  47 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
  48 {
  49         return (u32)wq->sz_m1 + 1;
  50 }
  51
  52 static u32 mlx5_wq_cyc_get_byte_size(struct mlx5_wq_cyc *wq)
  53 {
  54         return mlx5_wq_cyc_get_size(wq) << wq->log_stride;
  55 }
  56
  57 static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
  58 {
  59         return mlx5_cqwq_get_size(wq) << wq->log_stride;
  60 }
  61
  62 static u32 mlx5_wq_ll_get_byte_size(struct mlx5_wq_ll *wq)
  63 {
  64         return mlx5_wq_ll_get_size(wq) << wq->log_stride;
  65 }
  66
  67 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
  68                        void *wqc, struct mlx5_wq_cyc *wq,
  69                        struct mlx5_wq_ctrl *wq_ctrl)
  70 {
  71         int err;
  72
  73         wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
  74         wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
  75
  76         err = mlx5_db_alloc(mdev, &wq_ctrl->db);
  77         if (err) {
  78                 mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
  79                 return err;
  80         }
  81
  82         err = mlx5_buf_alloc(mdev, mlx5_wq_cyc_get_byte_size(wq), &wq_ctrl->buf);
  83         if (err) {
  84                 mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
  85                 goto err_db_free;
  86         }
  87
  88         wq->buf = wq_ctrl->buf.direct.buf;
  89         wq->db  = wq_ctrl->db.db;
  90
  91         wq_ctrl->mdev = mdev;
  92
  93         return 0;
  94
  95 err_db_free:
  96         mlx5_db_free(mdev, &wq_ctrl->db);
  97
  98         return err;
  99 }
 100
 101 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 102                      void *cqc, struct mlx5_cqwq *wq,
 103                      struct mlx5_wq_ctrl *wq_ctrl)
 104 {
 105         int err;
 106
 107         wq->log_stride = 6 + MLX5_GET(cqc, cqc, cqe_sz);
 108         wq->log_sz = MLX5_GET(cqc, cqc, log_cq_size);
 109         wq->sz_m1 = (1 << wq->log_sz) - 1;
 110
 111         err = mlx5_db_alloc(mdev, &wq_ctrl->db);
 112         if (err) {
 113                 mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
 114                 return err;
 115         }
 116
 117         err = mlx5_buf_alloc(mdev, mlx5_cqwq_get_byte_size(wq), &wq_ctrl->buf);
 118         if (err) {
 119                 mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
 120                 goto err_db_free;
 121         }
 122
 123         wq->buf = wq_ctrl->buf.direct.buf;
 124         wq->db  = wq_ctrl->db.db;
 125
 126         wq_ctrl->mdev = mdev;
 127
 128         return 0;
 129
 130 err_db_free:
 131         mlx5_db_free(mdev, &wq_ctrl->db);
 132
 133         return err;
 134 }
 135
 136 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 137                       void *wqc, struct mlx5_wq_ll *wq,
 138                       struct mlx5_wq_ctrl *wq_ctrl)
 139 {
 140         struct mlx5_wqe_srq_next_seg *next_seg;
 141         int err;
 142         int i;
 143
 144         wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
 145         wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
 146
 147         err = mlx5_db_alloc(mdev, &wq_ctrl->db);
 148         if (err) {
 149                 mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
 150                 return err;
 151         }
 152
 153         err = mlx5_buf_alloc(mdev, mlx5_wq_ll_get_byte_size(wq), &wq_ctrl->buf);
 154         if (err) {
 155                 mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
 156                 goto err_db_free;
 157         }
 158
 159         wq->buf = wq_ctrl->buf.direct.buf;
 160         wq->db  = wq_ctrl->db.db;
 161
 162         for (i = 0; i < wq->sz_m1; i++) {
 163                 next_seg = mlx5_wq_ll_get_wqe(wq, i);
 164                 next_seg->next_wqe_index = cpu_to_be16(i + 1);
 165         }
 166         next_seg = mlx5_wq_ll_get_wqe(wq, i);
 167         wq->tail_next = &next_seg->next_wqe_index;
 168
 169         wq_ctrl->mdev = mdev;
 170
 171         return 0;
 172
 173 err_db_free:
 174         mlx5_db_free(mdev, &wq_ctrl->db);
 175
 176         return err;
 177 }
 178
 179 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
 180 {
 181         mlx5_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
 182         mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
 183 }