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 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 100 void *qpc, struct mlx5_wq_qp *wq, 101 struct mlx5_wq_ctrl *wq_ctrl) 102 { 103 u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4; 104 u8 log_rq_sz = MLX5_GET(qpc, qpc, log_rq_size); 105 u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB); 106 u8 log_sq_sz = MLX5_GET(qpc, qpc, log_sq_size); 107 108 u32 rq_byte_size; 109 int err; 110 111 112 113 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 114 if (err) { 115 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 116 return err; 117 } 118 119 err = mlx5_frag_buf_alloc_node(mdev, 120 wq_get_byte_sz(log_rq_sz, log_rq_stride) + 121 wq_get_byte_sz(log_sq_sz, log_sq_stride), 122 &wq_ctrl->buf, param->buf_numa_node); 123 if (err) { 124 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err); 125 goto err_db_free; 126 } 127 128 mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc); 129 130 rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride); 131 132 if (rq_byte_size < PAGE_SIZE) { 133 /* SQ starts within the same page of the RQ */ 134 u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB; 135 136 mlx5_init_fbc_offset(wq_ctrl->buf.frags, 137 log_sq_stride, log_sq_sz, sq_strides_offset, 138 &wq->sq.fbc); 139 } else { 140 u16 rq_npages = rq_byte_size >> PAGE_SHIFT; 141 142 mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages, 143 log_sq_stride, log_sq_sz, &wq->sq.fbc); 144 } 145 146 wq->rq.db = &wq_ctrl->db.db[MLX5_RCV_DBR]; 147 wq->sq.db = &wq_ctrl->db.db[MLX5_SND_DBR]; 148 149 wq_ctrl->mdev = mdev; 150 151 return 0; 152 153 err_db_free: 154 mlx5_db_free(mdev, &wq_ctrl->db); 155 156 return err; 157 } 158 159 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 160 void *cqc, struct mlx5_cqwq *wq, 161 struct mlx5_wq_ctrl *wq_ctrl) 162 { 163 /* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */ 164 u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7; 165 u8 log_wq_sz = MLX5_GET(cqc, cqc, log_cq_size); 166 int err; 167 168 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 169 if (err) { 170 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 171 return err; 172 } 173 174 wq->db = wq_ctrl->db.db; 175 176 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride), 177 &wq_ctrl->buf, 178 param->buf_numa_node); 179 if (err) { 180 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", 181 err); 182 goto err_db_free; 183 } 184 185 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc); 186 187 wq_ctrl->mdev = mdev; 188 189 return 0; 190 191 err_db_free: 192 mlx5_db_free(mdev, &wq_ctrl->db); 193 194 return err; 195 } 196 197 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 198 void *wqc, struct mlx5_wq_ll *wq, 199 struct mlx5_wq_ctrl *wq_ctrl) 200 { 201 u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride); 202 u8 log_wq_sz = MLX5_GET(wq, wqc, log_wq_sz); 203 struct mlx5_frag_buf_ctrl *fbc = &wq->fbc; 204 struct mlx5_wqe_srq_next_seg *next_seg; 205 int err; 206 int i; 207 208 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 209 if (err) { 210 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 211 return err; 212 } 213 214 wq->db = wq_ctrl->db.db; 215 216 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride), 217 &wq_ctrl->buf, param->buf_numa_node); 218 if (err) { 219 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err); 220 goto err_db_free; 221 } 222 223 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc); 224 225 for (i = 0; i < fbc->sz_m1; i++) { 226 next_seg = mlx5_wq_ll_get_wqe(wq, i); 227 next_seg->next_wqe_index = cpu_to_be16(i + 1); 228 } 229 next_seg = mlx5_wq_ll_get_wqe(wq, i); 230 wq->tail_next = &next_seg->next_wqe_index; 231 232 wq_ctrl->mdev = mdev; 233 234 return 0; 235 236 err_db_free: 237 mlx5_db_free(mdev, &wq_ctrl->db); 238 239 return err; 240 } 241 242 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl) 243 { 244 mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf); 245 mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db); 246 } 247 248