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 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 98 void *qpc, struct mlx5_wq_qp *wq, 99 struct mlx5_wq_ctrl *wq_ctrl) 100 { 101 u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4; 102 u8 log_rq_sz = MLX5_GET(qpc, qpc, log_rq_size); 103 u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB); 104 u8 log_sq_sz = MLX5_GET(qpc, qpc, log_sq_size); 105 106 u32 rq_byte_size; 107 int err; 108 109 110 111 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 112 if (err) { 113 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 114 return err; 115 } 116 117 err = mlx5_frag_buf_alloc_node(mdev, 118 wq_get_byte_sz(log_rq_sz, log_rq_stride) + 119 wq_get_byte_sz(log_sq_sz, log_sq_stride), 120 &wq_ctrl->buf, param->buf_numa_node); 121 if (err) { 122 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err); 123 goto err_db_free; 124 } 125 126 mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc); 127 128 rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride); 129 130 if (rq_byte_size < PAGE_SIZE) { 131 /* SQ starts within the same page of the RQ */ 132 u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB; 133 134 mlx5_init_fbc_offset(wq_ctrl->buf.frags, 135 log_sq_stride, log_sq_sz, sq_strides_offset, 136 &wq->sq.fbc); 137 } else { 138 u16 rq_npages = rq_byte_size >> PAGE_SHIFT; 139 140 mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages, 141 log_sq_stride, log_sq_sz, &wq->sq.fbc); 142 } 143 144 wq->rq.db = &wq_ctrl->db.db[MLX5_RCV_DBR]; 145 wq->sq.db = &wq_ctrl->db.db[MLX5_SND_DBR]; 146 147 wq_ctrl->mdev = mdev; 148 149 return 0; 150 151 err_db_free: 152 mlx5_db_free(mdev, &wq_ctrl->db); 153 154 return err; 155 } 156 157 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 158 void *cqc, struct mlx5_cqwq *wq, 159 struct mlx5_wq_ctrl *wq_ctrl) 160 { 161 /* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */ 162 u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7; 163 u8 log_wq_sz = MLX5_GET(cqc, cqc, log_cq_size); 164 int err; 165 166 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 167 if (err) { 168 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 169 return err; 170 } 171 172 wq->db = wq_ctrl->db.db; 173 174 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride), 175 &wq_ctrl->buf, 176 param->buf_numa_node); 177 if (err) { 178 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", 179 err); 180 goto err_db_free; 181 } 182 183 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc); 184 185 wq_ctrl->mdev = mdev; 186 187 return 0; 188 189 err_db_free: 190 mlx5_db_free(mdev, &wq_ctrl->db); 191 192 return err; 193 } 194 195 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 196 void *wqc, struct mlx5_wq_ll *wq, 197 struct mlx5_wq_ctrl *wq_ctrl) 198 { 199 u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride); 200 u8 log_wq_sz = MLX5_GET(wq, wqc, log_wq_sz); 201 struct mlx5_frag_buf_ctrl *fbc = &wq->fbc; 202 struct mlx5_wqe_srq_next_seg *next_seg; 203 int err; 204 int i; 205 206 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node); 207 if (err) { 208 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err); 209 return err; 210 } 211 212 wq->db = wq_ctrl->db.db; 213 214 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride), 215 &wq_ctrl->buf, param->buf_numa_node); 216 if (err) { 217 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err); 218 goto err_db_free; 219 } 220 221 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc); 222 223 for (i = 0; i < fbc->sz_m1; i++) { 224 next_seg = mlx5_wq_ll_get_wqe(wq, i); 225 next_seg->next_wqe_index = cpu_to_be16(i + 1); 226 } 227 next_seg = mlx5_wq_ll_get_wqe(wq, i); 228 wq->tail_next = &next_seg->next_wqe_index; 229 230 wq_ctrl->mdev = mdev; 231 232 return 0; 233 234 err_db_free: 235 mlx5_db_free(mdev, &wq_ctrl->db); 236 237 return err; 238 } 239 240 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl) 241 { 242 mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf); 243 mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db); 244 } 245 246