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_wq_qp_get_byte_size(struct mlx5_wq_qp *wq)
  58 {
  59         return mlx5_wq_cyc_get_byte_size(&wq->rq) +
  60                mlx5_wq_cyc_get_byte_size(&wq->sq);
  61 }
  62
  63 static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
  64 {
  65         return mlx5_cqwq_get_size(wq) << wq->log_stride;
  66 }
  67
  68 static u32 mlx5_wq_ll_get_byte_size(struct mlx5_wq_ll *wq)
  69 {
  70         return mlx5_wq_ll_get_size(wq) << wq->log_stride;
  71 }
  72
  73 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
  74                        void *wqc, struct mlx5_wq_cyc *wq,
  75                        struct mlx5_wq_ctrl *wq_ctrl)
  76 {
  77         int err;
  78
  79         wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
  80         wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
  81
  82         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
  83         if (err) {
  84                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
  85                 return err;
  86         }
  87
  88         err = mlx5_buf_alloc_node(mdev, mlx5_wq_cyc_get_byte_size(wq),
  89                                   &wq_ctrl->buf, param->buf_numa_node);
  90         if (err) {
  91                 mlx5_core_warn(mdev, "mlx5_buf_alloc_node() failed, %d\n", err);
  92                 goto err_db_free;
  93         }
  94
  95         wq->buf = wq_ctrl->buf.direct.buf;
  96         wq->db  = wq_ctrl->db.db;
  97
  98         wq_ctrl->mdev = mdev;
  99
 100         return 0;
 101
 102 err_db_free:
 103         mlx5_db_free(mdev, &wq_ctrl->db);
 104
 105         return err;
 106 }
 107
 108 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 109                       void *qpc, struct mlx5_wq_qp *wq,
 110                       struct mlx5_wq_ctrl *wq_ctrl)
 111 {
 112         int err;
 113
 114         wq->rq.log_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
 115         wq->rq.sz_m1 = (1 << MLX5_GET(qpc, qpc, log_rq_size)) - 1;
 116
 117         wq->sq.log_stride = ilog2(MLX5_SEND_WQE_BB);
 118         wq->sq.sz_m1 = (1 << MLX5_GET(qpc, qpc, log_sq_size)) - 1;
 119
 120         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 121         if (err) {
 122                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 123                 return err;
 124         }
 125
 126         err = mlx5_buf_alloc_node(mdev, mlx5_wq_qp_get_byte_size(wq),
 127                                   &wq_ctrl->buf, param->buf_numa_node);
 128         if (err) {
 129                 mlx5_core_warn(mdev, "mlx5_buf_alloc_node() failed, %d\n", err);
 130                 goto err_db_free;
 131         }
 132
 133         wq->rq.buf = wq_ctrl->buf.direct.buf;
 134         wq->sq.buf = wq->rq.buf + mlx5_wq_cyc_get_byte_size(&wq->rq);
 135         wq->rq.db  = &wq_ctrl->db.db[MLX5_RCV_DBR];
 136         wq->sq.db  = &wq_ctrl->db.db[MLX5_SND_DBR];
 137
 138         wq_ctrl->mdev = mdev;
 139
 140         return 0;
 141
 142 err_db_free:
 143         mlx5_db_free(mdev, &wq_ctrl->db);
 144
 145         return err;
 146 }
 147
 148 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 149                      void *cqc, struct mlx5_cqwq *wq,
 150                      struct mlx5_frag_wq_ctrl *wq_ctrl)
 151 {
 152         int err;
 153
 154         wq->log_stride  = 6 + MLX5_GET(cqc, cqc, cqe_sz);
 155         wq->log_sz      = MLX5_GET(cqc, cqc, log_cq_size);
 156         wq->sz_m1       = (1 << wq->log_sz) - 1;
 157         wq->log_frag_strides = PAGE_SHIFT - wq->log_stride;
 158         wq->frag_sz_m1  = (1 << wq->log_frag_strides) - 1;
 159
 160         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 161         if (err) {
 162                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 163                 return err;
 164         }
 165
 166         err = mlx5_frag_buf_alloc_node(mdev, mlx5_cqwq_get_byte_size(wq),
 167                                        &wq_ctrl->frag_buf,
 168                                        param->buf_numa_node);
 169         if (err) {
 170                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n",
 171                                err);
 172                 goto err_db_free;
 173         }
 174
 175         wq->frag_buf = wq_ctrl->frag_buf;
 176         wq->db  = wq_ctrl->db.db;
 177
 178         wq_ctrl->mdev = mdev;
 179
 180         return 0;
 181
 182 err_db_free:
 183         mlx5_db_free(mdev, &wq_ctrl->db);
 184
 185         return err;
 186 }
 187
 188 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 189                       void *wqc, struct mlx5_wq_ll *wq,
 190                       struct mlx5_wq_ctrl *wq_ctrl)
 191 {
 192         struct mlx5_wqe_srq_next_seg *next_seg;
 193         int err;
 194         int i;
 195
 196         wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
 197         wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
 198
 199         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 200         if (err) {
 201                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 202                 return err;
 203         }
 204
 205         err = mlx5_buf_alloc_node(mdev, mlx5_wq_ll_get_byte_size(wq),
 206                                   &wq_ctrl->buf, param->buf_numa_node);
 207         if (err) {
 208                 mlx5_core_warn(mdev, "mlx5_buf_alloc_node() failed, %d\n", err);
 209                 goto err_db_free;
 210         }
 211
 212         wq->buf = wq_ctrl->buf.direct.buf;
 213         wq->db  = wq_ctrl->db.db;
 214
 215         for (i = 0; i < wq->sz_m1; i++) {
 216                 next_seg = mlx5_wq_ll_get_wqe(wq, i);
 217                 next_seg->next_wqe_index = cpu_to_be16(i + 1);
 218         }
 219         next_seg = mlx5_wq_ll_get_wqe(wq, i);
 220         wq->tail_next = &next_seg->next_wqe_index;
 221
 222         wq_ctrl->mdev = mdev;
 223
 224         return 0;
 225
 226 err_db_free:
 227         mlx5_db_free(mdev, &wq_ctrl->db);
 228
 229         return err;
 230 }
 231
 232 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
 233 {
 234         mlx5_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
 235         mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
 236 }
 237
 238 void mlx5_cqwq_destroy(struct mlx5_frag_wq_ctrl *wq_ctrl)
 239 {
 240         mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->frag_buf);
 241         mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
 242 }