LXR dpdk/drivers/net/mlx4/mlx4

   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 */
  27static inline void
  28mp_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 */
  51static int
  52mp_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 */
 106static int
 107mp_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                dev->tx_pkt_burst = mlx4_tx_burst;
 130                dev->rx_pkt_burst = mlx4_rx_burst;
 131#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
 132                ppriv = (struct mlx4_proc_priv *)dev->process_private;
 133                if (ppriv->uar_table_sz != dev->data->nb_tx_queues) {
 134                        mlx4_tx_uar_uninit_secondary(dev);
 135                        mlx4_proc_priv_uninit(dev);
 136                        ret = mlx4_proc_priv_init(dev);
 137                        if (ret)
 138                                return -rte_errno;
 139                        ret = mlx4_tx_uar_init_secondary(dev, mp_msg->fds[0]);
 140                        if (ret) {
 141                                mlx4_proc_priv_uninit(dev);
 142                                return -rte_errno;
 143                        }
 144                }
 145#endif
 146                rte_mb();
 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 */
 176static void
 177mp_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        }
 223exit:
 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 */
 234void
 235mlx4_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 */
 247void
 248mlx4_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 */
 264int
 265mlx4_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 */
 303int
 304mlx4_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);
 335exit:
 336        free(mp_rep.msgs);
 337        return ret;
 338}
 339
 340/**
 341 * Initialize by primary process.
 342 */
 343int
 344mlx4_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 */
 360void
 361mlx4_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 */
 370int
 371mlx4_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 */
 380void
 381mlx4_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