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 static u32 wq_get_byte_sz(u8 log_sz, u8 log_stride)
  38 {
  39         return ((u32)1 << log_sz) << log_stride;
  40 }
  41
  42 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
  43                        void *wqc, struct mlx5_wq_cyc *wq,
  44                        struct mlx5_wq_ctrl *wq_ctrl)
  45 {
  46         u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
  47         u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
  48         struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
  49         int err;
  50
  51         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
  52         if (err) {
  53                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
  54                 return err;
  55         }
  56
  57         wq->db  = wq_ctrl->db.db;
  58
  59         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
  60                                        &wq_ctrl->buf, param->buf_numa_node);
  61         if (err) {
  62                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
  63                 goto err_db_free;
  64         }
  65
  66         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
  67         wq->sz = mlx5_wq_cyc_get_size(wq);
  68
  69         wq_ctrl->mdev = mdev;
  70
  71         return 0;
  72
  73 err_db_free:
  74         mlx5_db_free(mdev, &wq_ctrl->db);
  75
  76         return err;
  77 }
  78
  79 void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides)
  80 {
  81         size_t len;
  82         void *wqe;
  83
  84         if (!net_ratelimit())
  85                 return;
  86
  87         nstrides = max_t(u8, nstrides, 1);
  88
  89         len = nstrides << wq->fbc.log_stride;
  90         wqe = mlx5_wq_cyc_get_wqe(wq, ix);
  91
  92         pr_info("WQE DUMP: WQ size %d WQ cur size %d, WQE index 0x%x, len: %zu\n",
  93                 mlx5_wq_cyc_get_size(wq), wq->cur_sz, ix, len);
  94         print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1, wqe, len, false);
  95 }
  96
  97 void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq)
  98 {
  99         wq->wqe_ctr = 0;
 100         wq->cur_sz = 0;
 101         mlx5_wq_cyc_update_db_record(wq);
 102 }
 103
 104 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 105                       void *qpc, struct mlx5_wq_qp *wq,
 106                       struct mlx5_wq_ctrl *wq_ctrl)
 107 {
 108         u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
 109         u8 log_rq_sz     = MLX5_GET(qpc, qpc, log_rq_size);
 110         u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB);
 111         u8 log_sq_sz     = MLX5_GET(qpc, qpc, log_sq_size);
 112
 113         u32 rq_byte_size;
 114         int err;
 115
 116
 117
 118         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 119         if (err) {
 120                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 121                 return err;
 122         }
 123
 124         err = mlx5_frag_buf_alloc_node(mdev,
 125                                        wq_get_byte_sz(log_rq_sz, log_rq_stride) +
 126                                        wq_get_byte_sz(log_sq_sz, log_sq_stride),
 127                                        &wq_ctrl->buf, param->buf_numa_node);
 128         if (err) {
 129                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
 130                 goto err_db_free;
 131         }
 132
 133         mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc);
 134
 135         rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride);
 136
 137         if (rq_byte_size < PAGE_SIZE) {
 138                 /* SQ starts within the same page of the RQ */
 139                 u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB;
 140
 141                 mlx5_init_fbc_offset(wq_ctrl->buf.frags,
 142                                      log_sq_stride, log_sq_sz, sq_strides_offset,
 143                                      &wq->sq.fbc);
 144         } else {
 145                 u16 rq_npages = rq_byte_size >> PAGE_SHIFT;
 146
 147                 mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages,
 148                               log_sq_stride, log_sq_sz, &wq->sq.fbc);
 149         }
 150
 151         wq->rq.db  = &wq_ctrl->db.db[MLX5_RCV_DBR];
 152         wq->sq.db  = &wq_ctrl->db.db[MLX5_SND_DBR];
 153
 154         wq_ctrl->mdev = mdev;
 155
 156         return 0;
 157
 158 err_db_free:
 159         mlx5_db_free(mdev, &wq_ctrl->db);
 160
 161         return err;
 162 }
 163
 164 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 165                      void *cqc, struct mlx5_cqwq *wq,
 166                      struct mlx5_wq_ctrl *wq_ctrl)
 167 {
 168         /* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */
 169         u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7;
 170         u8 log_wq_sz     = MLX5_GET(cqc, cqc, log_cq_size);
 171         int err;
 172
 173         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 174         if (err) {
 175                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 176                 return err;
 177         }
 178
 179         wq->db  = wq_ctrl->db.db;
 180
 181         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
 182                                        &wq_ctrl->buf,
 183                                        param->buf_numa_node);
 184         if (err) {
 185                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n",
 186                                err);
 187                 goto err_db_free;
 188         }
 189
 190         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc);
 191
 192         wq_ctrl->mdev = mdev;
 193
 194         return 0;
 195
 196 err_db_free:
 197         mlx5_db_free(mdev, &wq_ctrl->db);
 198
 199         return err;
 200 }
 201
 202 static void mlx5_wq_ll_init_list(struct mlx5_wq_ll *wq)
 203 {
 204         struct mlx5_wqe_srq_next_seg *next_seg;
 205         int i;
 206
 207         for (i = 0; i < wq->fbc.sz_m1; i++) {
 208                 next_seg = mlx5_wq_ll_get_wqe(wq, i);
 209                 next_seg->next_wqe_index = cpu_to_be16(i + 1);
 210         }
 211         next_seg = mlx5_wq_ll_get_wqe(wq, i);
 212         wq->tail_next = &next_seg->next_wqe_index;
 213 }
 214
 215 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 216                       void *wqc, struct mlx5_wq_ll *wq,
 217                       struct mlx5_wq_ctrl *wq_ctrl)
 218 {
 219         u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
 220         u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
 221         struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
 222         int err;
 223
 224         err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
 225         if (err) {
 226                 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
 227                 return err;
 228         }
 229
 230         wq->db  = wq_ctrl->db.db;
 231
 232         err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
 233                                        &wq_ctrl->buf, param->buf_numa_node);
 234         if (err) {
 235                 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
 236                 goto err_db_free;
 237         }
 238
 239         mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
 240
 241         mlx5_wq_ll_init_list(wq);
 242         wq_ctrl->mdev = mdev;
 243
 244         return 0;
 245
 246 err_db_free:
 247         mlx5_db_free(mdev, &wq_ctrl->db);
 248
 249         return err;
 250 }
 251
 252 void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq)
 253 {
 254         wq->head = 0;
 255         wq->wqe_ctr = 0;
 256         wq->cur_sz = 0;
 257         mlx5_wq_ll_init_list(wq);
 258         mlx5_wq_ll_update_db_record(wq);
 259 }
 260
 261 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
 262 {
 263         mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
 264         mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
 265 }
 266