1 /*- 2 * BSD LICENSE 3 * 4 * Copyright 2015 6WIND S.A. 5 * Copyright 2015 Mellanox. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of 6WIND S.A. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stddef.h> 35 #include <stdint.h> 36 #include <errno.h> 37 #include <string.h> 38 #include <assert.h> 39 40 /* Verbs header. */ 41 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */ 42 #ifdef PEDANTIC 43 #pragma GCC diagnostic ignored "-Wpedantic" 44 #endif 45 #include <infiniband/verbs.h> 46 #ifdef PEDANTIC 47 #pragma GCC diagnostic error "-Wpedantic" 48 #endif 49 50 #include <rte_malloc.h> 51 #include <rte_ethdev.h> 52 53 #include "mlx5.h" 54 #include "mlx5_rxtx.h" 55 56 /** 57 * DPDK callback to update the RSS hash configuration. 58 * 59 * @param dev 60 * Pointer to Ethernet device structure. 61 * @param[in] rss_conf 62 * RSS configuration data. 63 * 64 * @return 65 * 0 on success, negative errno value on failure. 66 */ 67 int 68 mlx5_rss_hash_update(struct rte_eth_dev *dev, 69 struct rte_eth_rss_conf *rss_conf) 70 { 71 struct priv *priv = dev->data->dev_private; 72 int ret = 0; 73 74 priv_lock(priv); 75 if (rss_conf->rss_key_len) { 76 priv->rss_conf.rss_key = rte_realloc(priv->rss_conf.rss_key, 77 rss_conf->rss_key_len, 0); 78 if (!priv->rss_conf.rss_key) { 79 ret = -ENOMEM; 80 goto out; 81 } 82 memcpy(&priv->rss_conf.rss_key, rss_conf->rss_key, 83 rss_conf->rss_key_len); 84 priv->rss_conf.rss_key_len = rss_conf->rss_key_len; 85 } 86 priv->rss_conf.rss_hf = rss_conf->rss_hf; 87 out: 88 priv_unlock(priv); 89 return ret; 90 } 91 92 /** 93 * DPDK callback to get the RSS hash configuration. 94 * 95 * @param dev 96 * Pointer to Ethernet device structure. 97 * @param[in, out] rss_conf 98 * RSS configuration data. 99 * 100 * @return 101 * 0 on success, negative errno value on failure. 102 */ 103 int 104 mlx5_rss_hash_conf_get(struct rte_eth_dev *dev, 105 struct rte_eth_rss_conf *rss_conf) 106 { 107 struct priv *priv = dev->data->dev_private; 108 int ret = 0; 109 110 priv_lock(priv); 111 if (!rss_conf->rss_key) { 112 ret = -ENOMEM; 113 goto out; 114 } 115 if (rss_conf->rss_key_len < priv->rss_conf.rss_key_len) { 116 ret = -EINVAL; 117 goto out; 118 } 119 memcpy(rss_conf->rss_key, priv->rss_conf.rss_key, 120 priv->rss_conf.rss_key_len); 121 out: 122 priv_unlock(priv); 123 return ret; 124 } 125 126 /** 127 * Allocate/reallocate RETA index table. 128 * 129 * @param priv 130 * Pointer to private structure. 131 * @praram reta_size 132 * The size of the array to allocate. 133 * 134 * @return 135 * 0 on success, errno value on failure. 136 */ 137 int 138 priv_rss_reta_index_resize(struct priv *priv, unsigned int reta_size) 139 { 140 void *mem; 141 unsigned int old_size = priv->reta_idx_n; 142 143 if (priv->reta_idx_n == reta_size) 144 return 0; 145 146 mem = rte_realloc(priv->reta_idx, 147 reta_size * sizeof((*priv->reta_idx)[0]), 0); 148 if (!mem) 149 return ENOMEM; 150 priv->reta_idx = mem; 151 priv->reta_idx_n = reta_size; 152 153 if (old_size < reta_size) 154 memset(&(*priv->reta_idx)[old_size], 0, 155 (reta_size - old_size) * 156 sizeof((*priv->reta_idx)[0])); 157 return 0; 158 } 159 160 /** 161 * Query RETA table. 162 * 163 * @param priv 164 * Pointer to private structure. 165 * @param[in, out] reta_conf 166 * Pointer to the first RETA configuration structure. 167 * @param reta_size 168 * Number of entries. 169 * 170 * @return 171 * 0 on success, errno value on failure. 172 */ 173 static int 174 priv_dev_rss_reta_query(struct priv *priv, 175 struct rte_eth_rss_reta_entry64 *reta_conf, 176 unsigned int reta_size) 177 { 178 unsigned int idx; 179 unsigned int i; 180 181 if (!reta_size || reta_size > priv->reta_idx_n) 182 return EINVAL; 183 /* Fill each entry of the table even if its bit is not set. */ 184 for (idx = 0, i = 0; (i != reta_size); ++i) { 185 idx = i / RTE_RETA_GROUP_SIZE; 186 reta_conf[idx].reta[i % RTE_RETA_GROUP_SIZE] = 187 (*priv->reta_idx)[i]; 188 } 189 return 0; 190 } 191 192 /** 193 * Update RETA table. 194 * 195 * @param priv 196 * Pointer to private structure. 197 * @param[in] reta_conf 198 * Pointer to the first RETA configuration structure. 199 * @param reta_size 200 * Number of entries. 201 * 202 * @return 203 * 0 on success, errno value on failure. 204 */ 205 static int 206 priv_dev_rss_reta_update(struct priv *priv, 207 struct rte_eth_rss_reta_entry64 *reta_conf, 208 unsigned int reta_size) 209 { 210 unsigned int idx; 211 unsigned int i; 212 unsigned int pos; 213 int ret; 214 215 if (!reta_size) 216 return EINVAL; 217 ret = priv_rss_reta_index_resize(priv, reta_size); 218 if (ret) 219 return ret; 220 221 for (idx = 0, i = 0; (i != reta_size); ++i) { 222 idx = i / RTE_RETA_GROUP_SIZE; 223 pos = i % RTE_RETA_GROUP_SIZE; 224 if (((reta_conf[idx].mask >> i) & 0x1) == 0) 225 continue; 226 assert(reta_conf[idx].reta[pos] < priv->rxqs_n); 227 (*priv->reta_idx)[i] = reta_conf[idx].reta[pos]; 228 } 229 return 0; 230 } 231 232 /** 233 * DPDK callback to get the RETA indirection table. 234 * 235 * @param dev 236 * Pointer to Ethernet device structure. 237 * @param reta_conf 238 * Pointer to RETA configuration structure array. 239 * @param reta_size 240 * Size of the RETA table. 241 * 242 * @return 243 * 0 on success, negative errno value on failure. 244 */ 245 int 246 mlx5_dev_rss_reta_query(struct rte_eth_dev *dev, 247 struct rte_eth_rss_reta_entry64 *reta_conf, 248 uint16_t reta_size) 249 { 250 int ret; 251 struct priv *priv = dev->data->dev_private; 252 253 priv_lock(priv); 254 ret = priv_dev_rss_reta_query(priv, reta_conf, reta_size); 255 priv_unlock(priv); 256 return -ret; 257 } 258 259 /** 260 * DPDK callback to update the RETA indirection table. 261 * 262 * @param dev 263 * Pointer to Ethernet device structure. 264 * @param reta_conf 265 * Pointer to RETA configuration structure array. 266 * @param reta_size 267 * Size of the RETA table. 268 * 269 * @return 270 * 0 on success, negative errno value on failure. 271 */ 272 int 273 mlx5_dev_rss_reta_update(struct rte_eth_dev *dev, 274 struct rte_eth_rss_reta_entry64 *reta_conf, 275 uint16_t reta_size) 276 { 277 int ret; 278 struct priv *priv = dev->data->dev_private; 279 280 assert(!mlx5_is_secondary()); 281 priv_lock(priv); 282 ret = priv_dev_rss_reta_update(priv, reta_conf, reta_size); 283 priv_unlock(priv); 284 if (dev->data->dev_started) { 285 mlx5_dev_stop(dev); 286 mlx5_dev_start(dev); 287 } 288 return -ret; 289 } 290