1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2019 6WIND S.A. 3 * Copyright 2019 Mellanox Technologies, Ltd 4 */ 5 6 #include <stdio.h> 7 #include <time.h> 8 9 #include <rte_eal.h> 10 #include <ethdev_driver.h> 11 #include <rte_string_fns.h> 12 13 #include "mlx4.h" 14 #include "mlx4_rxtx.h" 15 #include "mlx4_utils.h" 16 17 /** 18 * Initialize IPC message. 19 * 20 * @param[in] dev 21 * Pointer to Ethernet structure. 22 * @param[out] msg 23 * Pointer to message to fill in. 24 * @param[in] type 25 * Message type. 26 */ 27 static inline void 28 mp_init_msg(struct rte_eth_dev *dev, struct rte_mp_msg *msg, 29 enum mlx4_mp_req_type type) 30 { 31 struct mlx4_mp_param *param = (struct mlx4_mp_param *)msg->param; 32 33 memset(msg, 0, sizeof(*msg)); 34 strlcpy(msg->name, MLX4_MP_NAME, sizeof(msg->name)); 35 msg->len_param = sizeof(*param); 36 param->type = type; 37 param->port_id = dev->data->port_id; 38 } 39 40 /** 41 * IPC message handler of primary process. 42 * 43 * @param[in] dev 44 * Pointer to Ethernet structure. 45 * @param[in] peer 46 * Pointer to the peer socket path. 47 * 48 * @return 49 * 0 on success, negative errno value otherwise and rte_errno is set. 50 */ 51 static int 52 mp_primary_handle(const struct rte_mp_msg *mp_msg, const void *peer) 53 { 54 struct rte_mp_msg mp_res; 55 struct mlx4_mp_param *res = (struct mlx4_mp_param *)mp_res.param; 56 const struct mlx4_mp_param *param = 57 (const struct mlx4_mp_param *)mp_msg->param; 58 struct rte_eth_dev *dev; 59 struct mlx4_priv *priv; 60 struct mlx4_mr_cache entry; 61 uint32_t lkey; 62 int ret; 63 64 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY); 65 if (!rte_eth_dev_is_valid_port(param->port_id)) { 66 rte_errno = ENODEV; 67 ERROR("port %u invalid port ID", param->port_id); 68 return -rte_errno; 69 } 70 dev = &rte_eth_devices[param->port_id]; 71 priv = dev->data->dev_private; 72 switch (param->type) { 73 case MLX4_MP_REQ_CREATE_MR: 74 mp_init_msg(dev, &mp_res, param->type); 75 lkey = mlx4_mr_create_primary(dev, &entry, param->args.addr); 76 if (lkey == UINT32_MAX) 77 res->result = -rte_errno; 78 ret = rte_mp_reply(&mp_res, peer); 79 break; 80 case MLX4_MP_REQ_VERBS_CMD_FD: 81 mp_init_msg(dev, &mp_res, param->type); 82 mp_res.num_fds = 1; 83 mp_res.fds[0] = priv->ctx->cmd_fd; 84 res->result = 0; 85 ret = rte_mp_reply(&mp_res, peer); 86 break; 87 default: 88 rte_errno = EINVAL; 89 ERROR("port %u invalid mp request type", dev->data->port_id); 90 return -rte_errno; 91 } 92 return ret; 93 } 94 95 /** 96 * IPC message handler of a secondary process. 97 * 98 * @param[in] dev 99 * Pointer to Ethernet structure. 100 * @param[in] peer 101 * Pointer to the peer socket path. 102 * 103 * @return 104 * 0 on success, a negative errno value otherwise and rte_errno is set. 105 */ 106 static int 107 mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer) 108 { 109 struct rte_mp_msg mp_res; 110 struct mlx4_mp_param *res = (struct mlx4_mp_param *)mp_res.param; 111 const struct mlx4_mp_param *param = 112 (const struct mlx4_mp_param *)mp_msg->param; 113 struct rte_eth_dev *dev; 114 #ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET 115 struct mlx4_proc_priv *ppriv; 116 #endif 117 int ret; 118 119 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY); 120 if (!rte_eth_dev_is_valid_port(param->port_id)) { 121 rte_errno = ENODEV; 122 ERROR("port %u invalid port ID", param->port_id); 123 return -rte_errno; 124 } 125 dev = &rte_eth_devices[param->port_id]; 126 switch (param->type) { 127 case MLX4_MP_REQ_START_RXTX: 128 INFO("port %u starting datapath", dev->data->port_id); 129 rte_mb(); 130 dev->tx_pkt_burst = mlx4_tx_burst; 131 dev->rx_pkt_burst = mlx4_rx_burst; 132 #ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET 133 ppriv = (struct mlx4_proc_priv *)dev->process_private; 134 if (ppriv->uar_table_sz != dev->data->nb_tx_queues) { 135 mlx4_tx_uar_uninit_secondary(dev); 136 mlx4_proc_priv_uninit(dev); 137 ret = mlx4_proc_priv_init(dev); 138 if (ret) 139 return -rte_errno; 140 ret = mlx4_tx_uar_init_secondary(dev, mp_msg->fds[0]); 141 if (ret) { 142 mlx4_proc_priv_uninit(dev); 143 return -rte_errno; 144 } 145 } 146 #endif 147 mp_init_msg(dev, &mp_res, param->type); 148 res->result = 0; 149 ret = rte_mp_reply(&mp_res, peer); 150 break; 151 case MLX4_MP_REQ_STOP_RXTX: 152 INFO("port %u stopping datapath", dev->data->port_id); 153 dev->tx_pkt_burst = mlx4_tx_burst_removed; 154 dev->rx_pkt_burst = mlx4_rx_burst_removed; 155 rte_mb(); 156 mp_init_msg(dev, &mp_res, param->type); 157 res->result = 0; 158 ret = rte_mp_reply(&mp_res, peer); 159 break; 160 default: 161 rte_errno = EINVAL; 162 ERROR("port %u invalid mp request type", dev->data->port_id); 163 return -rte_errno; 164 } 165 return ret; 166 } 167 168 /** 169 * Broadcast request of stopping/starting data-path to secondary processes. 170 * 171 * @param[in] dev 172 * Pointer to Ethernet structure. 173 * @param[in] type 174 * Request type. 175 */ 176 static void 177 mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type) 178 { 179 struct rte_mp_msg mp_req; 180 struct rte_mp_msg *mp_res; 181 struct rte_mp_reply mp_rep; 182 struct mlx4_mp_param *res __rte_unused; 183 struct timespec ts = {.tv_sec = MLX4_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; 184 struct mlx4_priv *priv; 185 int ret; 186 int i; 187 188 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY); 189 if (!mlx4_shared_data->secondary_cnt) 190 return; 191 if (type != MLX4_MP_REQ_START_RXTX && type != MLX4_MP_REQ_STOP_RXTX) { 192 ERROR("port %u unknown request (req_type %d)", 193 dev->data->port_id, type); 194 return; 195 } 196 mp_init_msg(dev, &mp_req, type); 197 if (type == MLX4_MP_REQ_START_RXTX) { 198 priv = dev->data->dev_private; 199 mp_req.num_fds = 1; 200 mp_req.fds[0] = priv->ctx->cmd_fd; 201 } 202 ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); 203 if (ret) { 204 if (rte_errno != ENOTSUP) 205 ERROR("port %u failed to request stop/start Rx/Tx (%d)", 206 dev->data->port_id, type); 207 goto exit; 208 } 209 if (mp_rep.nb_sent != mp_rep.nb_received) { 210 ERROR("port %u not all secondaries responded (req_type %d)", 211 dev->data->port_id, type); 212 goto exit; 213 } 214 for (i = 0; i < mp_rep.nb_received; i++) { 215 mp_res = &mp_rep.msgs[i]; 216 res = (struct mlx4_mp_param *)mp_res->param; 217 if (res->result) { 218 ERROR("port %u request failed on secondary #%d", 219 dev->data->port_id, i); 220 goto exit; 221 } 222 } 223 exit: 224 free(mp_rep.msgs); 225 } 226 227 /** 228 * Broadcast request of starting data-path to secondary processes. The request 229 * is synchronous. 230 * 231 * @param[in] dev 232 * Pointer to Ethernet structure. 233 */ 234 void 235 mlx4_mp_req_start_rxtx(struct rte_eth_dev *dev) 236 { 237 mp_req_on_rxtx(dev, MLX4_MP_REQ_START_RXTX); 238 } 239 240 /** 241 * Broadcast request of stopping data-path to secondary processes. The request 242 * is synchronous. 243 * 244 * @param[in] dev 245 * Pointer to Ethernet structure. 246 */ 247 void 248 mlx4_mp_req_stop_rxtx(struct rte_eth_dev *dev) 249 { 250 mp_req_on_rxtx(dev, MLX4_MP_REQ_STOP_RXTX); 251 } 252 253 /** 254 * Request Memory Region creation to the primary process. 255 * 256 * @param[in] dev 257 * Pointer to Ethernet structure. 258 * @param addr 259 * Target virtual address to register. 260 * 261 * @return 262 * 0 on success, a negative errno value otherwise and rte_errno is set. 263 */ 264 int 265 mlx4_mp_req_mr_create(struct rte_eth_dev *dev, uintptr_t addr) 266 { 267 struct rte_mp_msg mp_req; 268 struct rte_mp_msg *mp_res; 269 struct rte_mp_reply mp_rep; 270 struct mlx4_mp_param *req = (struct mlx4_mp_param *)mp_req.param; 271 struct mlx4_mp_param *res; 272 struct timespec ts = {.tv_sec = MLX4_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; 273 int ret; 274 275 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY); 276 mp_init_msg(dev, &mp_req, MLX4_MP_REQ_CREATE_MR); 277 req->args.addr = addr; 278 ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); 279 if (ret) { 280 ERROR("port %u request to primary process failed", 281 dev->data->port_id); 282 return -rte_errno; 283 } 284 MLX4_ASSERT(mp_rep.nb_received == 1); 285 mp_res = &mp_rep.msgs[0]; 286 res = (struct mlx4_mp_param *)mp_res->param; 287 ret = res->result; 288 if (ret) 289 rte_errno = -ret; 290 free(mp_rep.msgs); 291 return ret; 292 } 293 294 /** 295 * IPC message handler of primary process. 296 * 297 * @param[in] dev 298 * Pointer to Ethernet structure. 299 * 300 * @return 301 * fd on success, a negative errno value otherwise and rte_errno is set. 302 */ 303 int 304 mlx4_mp_req_verbs_cmd_fd(struct rte_eth_dev *dev) 305 { 306 struct rte_mp_msg mp_req; 307 struct rte_mp_msg *mp_res; 308 struct rte_mp_reply mp_rep; 309 struct mlx4_mp_param *res; 310 struct timespec ts = {.tv_sec = MLX4_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; 311 int ret; 312 313 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY); 314 mp_init_msg(dev, &mp_req, MLX4_MP_REQ_VERBS_CMD_FD); 315 ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); 316 if (ret) { 317 ERROR("port %u request to primary process failed", 318 dev->data->port_id); 319 return -rte_errno; 320 } 321 MLX4_ASSERT(mp_rep.nb_received == 1); 322 mp_res = &mp_rep.msgs[0]; 323 res = (struct mlx4_mp_param *)mp_res->param; 324 if (res->result) { 325 rte_errno = -res->result; 326 ERROR("port %u failed to get command FD from primary process", 327 dev->data->port_id); 328 ret = -rte_errno; 329 goto exit; 330 } 331 MLX4_ASSERT(mp_res->num_fds == 1); 332 ret = mp_res->fds[0]; 333 DEBUG("port %u command FD from primary is %d", 334 dev->data->port_id, ret); 335 exit: 336 free(mp_rep.msgs); 337 return ret; 338 } 339 340 /** 341 * Initialize by primary process. 342 */ 343 int 344 mlx4_mp_init_primary(void) 345 { 346 int ret; 347 348 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY); 349 350 /* primary is allowed to not support IPC */ 351 ret = rte_mp_action_register(MLX4_MP_NAME, mp_primary_handle); 352 if (ret && rte_errno != ENOTSUP) 353 return -1; 354 return 0; 355 } 356 357 /** 358 * Un-initialize by primary process. 359 */ 360 void 361 mlx4_mp_uninit_primary(void) 362 { 363 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY); 364 rte_mp_action_unregister(MLX4_MP_NAME); 365 } 366 367 /** 368 * Initialize by secondary process. 369 */ 370 int 371 mlx4_mp_init_secondary(void) 372 { 373 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY); 374 return rte_mp_action_register(MLX4_MP_NAME, mp_secondary_handle); 375 } 376 377 /** 378 * Un-initialize by secondary process. 379 */ 380 void 381 mlx4_mp_uninit_secondary(void) 382 { 383 MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY); 384 rte_mp_action_unregister(MLX4_MP_NAME); 385 } 386