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

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This source file includes following definitions.
mlx5_wq_cyc_get_size
mlx5_cqwq_get_size
mlx5_cqwq_get_log_stride_size
mlx5_wq_ll_get_size
wq_get_byte_sz
mlx5_wq_cyc_create
mlx5_wq_cyc_reset
mlx5_wq_qp_create
mlx5_cqwq_create
mlx5_wq_ll_init_list
mlx5_wq_ll_create
mlx5_wq_ll_reset
mlx5_wq_destroy
   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->fbc.sz_m1 + 1;
  40 }
  41 
  42 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
  43 {
  44         return wq->fbc.sz_m1 + 1;
  45 }
  46 
  47 u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)
  48 {
  49         return wq->fbc.log_stride;
  50 }
  51 
  52 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
  53 {
  54         return (u32)wq->fbc.sz_m1 + 1;
  55 }
  56 
  57 static u32 wq_get_byte_sz(u8 log_sz, u8 log_stride)
  58 {
  59         return ((u32)1 << log_sz) << log_stride;
  60 }
  61 
  62 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
  63                        void *wqc, struct mlx5_wq_cyc *wq,
  64                        struct mlx5_wq_ctrl *wq_ctrl)
  65 {
  66         u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
  67         u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
  68         struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
  69         int err;
  70 
  71         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
  72         if (err) {
  73                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
  74                 return err;
  75         }
  76 
  77         wq->db  = wq_ctrl->db.db;
  78 
  79         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
  80                                        &wq_ctrl->buf, param->buf_numa_node);
  81         if (err) {
  82                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
  83                 goto err_db_free;
  84         }
  85 
  86         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
  87         wq->sz = mlx5_wq_cyc_get_size(wq);
  88 
  89         wq_ctrl->mdev = mdev;
  90 
  91         return 0;
  92 
  93 err_db_free:
  94         mlx5_db_free(mdev, &wq_ctrl->db);
  95 
  96         return err;
  97 }
  98 
  99 void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq)
 100 {
 101         wq->wqe_ctr = 0;
 102         wq->cur_sz = 0;
 103         mlx5_wq_cyc_update_db_record(wq);
 104 }
 105 
 106 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 107                       void *qpc, struct mlx5_wq_qp *wq,
 108                       struct mlx5_wq_ctrl *wq_ctrl)
 109 {
 110         u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
 111         u8 log_rq_sz     = MLX5_GET(qpc, qpc, log_rq_size);
 112         u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB);
 113         u8 log_sq_sz     = MLX5_GET(qpc, qpc, log_sq_size);
 114 
 115         u32 rq_byte_size;
 116         int err;
 117 
 118 
 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_frag_buf_alloc_node(mdev,
 127                                        wq_get_byte_sz(log_rq_sz, log_rq_stride) +
 128                                        wq_get_byte_sz(log_sq_sz, log_sq_stride),
 129                                        &wq_ctrl->buf, param->buf_numa_node);
 130         if (err) {
 131                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
 132                 goto err_db_free;
 133         }
 134 
 135         mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc);
 136 
 137         rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride);
 138 
 139         if (rq_byte_size < PAGE_SIZE) {
 140                 /* SQ starts within the same page of the RQ */
 141                 u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB;
 142 
 143                 mlx5_init_fbc_offset(wq_ctrl->buf.frags,
 144                                      log_sq_stride, log_sq_sz, sq_strides_offset,
 145                                      &wq->sq.fbc);
 146         } else {
 147                 u16 rq_npages = rq_byte_size >> PAGE_SHIFT;
 148 
 149                 mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages,
 150                               log_sq_stride, log_sq_sz, &wq->sq.fbc);
 151         }
 152 
 153         wq->rq.db  = &wq_ctrl->db.db[MLX5_RCV_DBR];
 154         wq->sq.db  = &wq_ctrl->db.db[MLX5_SND_DBR];
 155 
 156         wq_ctrl->mdev = mdev;
 157 
 158         return 0;
 159 
 160 err_db_free:
 161         mlx5_db_free(mdev, &wq_ctrl->db);
 162 
 163         return err;
 164 }
 165 
 166 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 167                      void *cqc, struct mlx5_cqwq *wq,
 168                      struct mlx5_wq_ctrl *wq_ctrl)
 169 {
 170         /* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */
 171         u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7;
 172         u8 log_wq_sz     = MLX5_GET(cqc, cqc, log_cq_size);
 173         int err;
 174 
 175         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 176         if (err) {
 177                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 178                 return err;
 179         }
 180 
 181         wq->db  = wq_ctrl->db.db;
 182 
 183         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
 184                                        &wq_ctrl->buf,
 185                                        param->buf_numa_node);
 186         if (err) {
 187                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n",
 188                                err);
 189                 goto err_db_free;
 190         }
 191 
 192         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc);
 193 
 194         wq_ctrl->mdev = mdev;
 195 
 196         return 0;
 197 
 198 err_db_free:
 199         mlx5_db_free(mdev, &wq_ctrl->db);
 200 
 201         return err;
 202 }
 203 
 204 static void mlx5_wq_ll_init_list(struct mlx5_wq_ll *wq)
 205 {
 206         struct mlx5_wqe_srq_next_seg *next_seg;
 207         int i;
 208 
 209         for (i = 0; i < wq->fbc.sz_m1; i++) {
 210                 next_seg = mlx5_wq_ll_get_wqe(wq, i);
 211                 next_seg->next_wqe_index = cpu_to_be16(i + 1);
 212         }
 213         next_seg = mlx5_wq_ll_get_wqe(wq, i);
 214         wq->tail_next = &next_seg->next_wqe_index;
 215 }
 216 
 217 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 218                       void *wqc, struct mlx5_wq_ll *wq,
 219                       struct mlx5_wq_ctrl *wq_ctrl)
 220 {
 221         u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
 222         u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
 223         struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
 224         int err;
 225 
 226         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 227         if (err) {
 228                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 229                 return err;
 230         }
 231 
 232         wq->db  = wq_ctrl->db.db;
 233 
 234         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
 235                                        &wq_ctrl->buf, param->buf_numa_node);
 236         if (err) {
 237                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
 238                 goto err_db_free;
 239         }
 240 
 241         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
 242 
 243         mlx5_wq_ll_init_list(wq);
 244         wq_ctrl->mdev = mdev;
 245 
 246         return 0;
 247 
 248 err_db_free:
 249         mlx5_db_free(mdev, &wq_ctrl->db);
 250 
 251         return err;
 252 }
 253 
 254 void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq)
 255 {
 256         wq->head = 0;
 257         wq->wqe_ctr = 0;
 258         wq->cur_sz = 0;
 259         mlx5_wq_ll_init_list(wq);
 260         mlx5_wq_ll_update_db_record(wq);
 261 }
 262 
 263 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
 264 {
 265         mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
 266         mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
 267 }
 268
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/mellanox/mlx5/core/wq.c

DEFINITIONS
