diff options
Diffstat (limited to 'src/seastar/dpdk/drivers/net/mlx5/mlx5_mp.c')
| -rw-r--r-- | src/seastar/dpdk/drivers/net/mlx5/mlx5_mp.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/src/seastar/dpdk/drivers/net/mlx5/mlx5_mp.c b/src/seastar/dpdk/drivers/net/mlx5/mlx5_mp.c new file mode 100644 index 000000000..cea74adb6 --- /dev/null +++ b/src/seastar/dpdk/drivers/net/mlx5/mlx5_mp.c @@ -0,0 +1,358 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2019 6WIND S.A. + * Copyright 2019 Mellanox Technologies, Ltd + */ + +#include <assert.h> +#include <stdio.h> +#include <time.h> + +#include <rte_eal.h> +#include <rte_ethdev_driver.h> +#include <rte_string_fns.h> + +#include "mlx5.h" +#include "mlx5_rxtx.h" +#include "mlx5_utils.h" + +/** + * Initialize IPC message. + * + * @param[in] dev + * Pointer to Ethernet structure. + * @param[out] msg + * Pointer to message to fill in. + * @param[in] type + * Message type. + */ +static inline void +mp_init_msg(struct rte_eth_dev *dev, struct rte_mp_msg *msg, + enum mlx5_mp_req_type type) +{ + struct mlx5_mp_param *param = (struct mlx5_mp_param *)msg->param; + + memset(msg, 0, sizeof(*msg)); + strlcpy(msg->name, MLX5_MP_NAME, sizeof(msg->name)); + msg->len_param = sizeof(*param); + param->type = type; + param->port_id = dev->data->port_id; +} + +/** + * IPC message handler of primary process. + * + * @param[in] dev + * Pointer to Ethernet structure. + * @param[in] peer + * Pointer to the peer socket path. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +static int +mp_primary_handle(const struct rte_mp_msg *mp_msg, const void *peer) +{ + struct rte_mp_msg mp_res; + struct mlx5_mp_param *res = (struct mlx5_mp_param *)mp_res.param; + const struct mlx5_mp_param *param = + (const struct mlx5_mp_param *)mp_msg->param; + struct rte_eth_dev *dev; + struct mlx5_priv *priv; + struct mlx5_mr_cache entry; + uint32_t lkey; + int ret; + + assert(rte_eal_process_type() == RTE_PROC_PRIMARY); + if (!rte_eth_dev_is_valid_port(param->port_id)) { + rte_errno = ENODEV; + DRV_LOG(ERR, "port %u invalid port ID", param->port_id); + return -rte_errno; + } + dev = &rte_eth_devices[param->port_id]; + priv = dev->data->dev_private; + switch (param->type) { + case MLX5_MP_REQ_CREATE_MR: + mp_init_msg(dev, &mp_res, param->type); + lkey = mlx5_mr_create_primary(dev, &entry, param->args.addr); + if (lkey == UINT32_MAX) + res->result = -rte_errno; + ret = rte_mp_reply(&mp_res, peer); + break; + case MLX5_MP_REQ_VERBS_CMD_FD: + mp_init_msg(dev, &mp_res, param->type); + mp_res.num_fds = 1; + mp_res.fds[0] = priv->sh->ctx->cmd_fd; + res->result = 0; + ret = rte_mp_reply(&mp_res, peer); + break; + default: + rte_errno = EINVAL; + DRV_LOG(ERR, "port %u invalid mp request type", + dev->data->port_id); + return -rte_errno; + } + return ret; +} + +/** + * IPC message handler of a secondary process. + * + * @param[in] dev + * Pointer to Ethernet structure. + * @param[in] peer + * Pointer to the peer socket path. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +static int +mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer) +{ + struct rte_mp_msg mp_res; + struct mlx5_mp_param *res = (struct mlx5_mp_param *)mp_res.param; + const struct mlx5_mp_param *param = + (const struct mlx5_mp_param *)mp_msg->param; + struct rte_eth_dev *dev; + int ret; + + assert(rte_eal_process_type() == RTE_PROC_SECONDARY); + if (!rte_eth_dev_is_valid_port(param->port_id)) { + rte_errno = ENODEV; + DRV_LOG(ERR, "port %u invalid port ID", param->port_id); + return -rte_errno; + } + dev = &rte_eth_devices[param->port_id]; + switch (param->type) { + case MLX5_MP_REQ_START_RXTX: + DRV_LOG(INFO, "port %u starting datapath", dev->data->port_id); + rte_mb(); + dev->rx_pkt_burst = mlx5_select_rx_function(dev); + dev->tx_pkt_burst = mlx5_select_tx_function(dev); + mp_init_msg(dev, &mp_res, param->type); + res->result = 0; + ret = rte_mp_reply(&mp_res, peer); + break; + case MLX5_MP_REQ_STOP_RXTX: + DRV_LOG(INFO, "port %u stopping datapath", dev->data->port_id); + dev->rx_pkt_burst = removed_rx_burst; + dev->tx_pkt_burst = removed_tx_burst; + rte_mb(); + mp_init_msg(dev, &mp_res, param->type); + res->result = 0; + ret = rte_mp_reply(&mp_res, peer); + break; + default: + rte_errno = EINVAL; + DRV_LOG(ERR, "port %u invalid mp request type", + dev->data->port_id); + return -rte_errno; + } + return ret; +} + +/** + * Broadcast request of stopping/starting data-path to secondary processes. + * + * @param[in] dev + * Pointer to Ethernet structure. + * @param[in] type + * Request type. + */ +static void +mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx5_mp_req_type type) +{ + struct rte_mp_msg mp_req; + struct rte_mp_msg *mp_res; + struct rte_mp_reply mp_rep; + struct mlx5_mp_param *res; + struct timespec ts = {.tv_sec = MLX5_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; + int ret; + int i; + + assert(rte_eal_process_type() == RTE_PROC_PRIMARY); + if (!mlx5_shared_data->secondary_cnt) + return; + if (type != MLX5_MP_REQ_START_RXTX && type != MLX5_MP_REQ_STOP_RXTX) { + DRV_LOG(ERR, "port %u unknown request (req_type %d)", + dev->data->port_id, type); + return; + } + mp_init_msg(dev, &mp_req, type); + ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); + if (ret) { + DRV_LOG(ERR, "port %u failed to request stop/start Rx/Tx (%d)", + dev->data->port_id, type); + goto exit; + } + if (mp_rep.nb_sent != mp_rep.nb_received) { + DRV_LOG(ERR, + "port %u not all secondaries responded (req_type %d)", + dev->data->port_id, type); + goto exit; + } + for (i = 0; i < mp_rep.nb_received; i++) { + mp_res = &mp_rep.msgs[i]; + res = (struct mlx5_mp_param *)mp_res->param; + if (res->result) { + DRV_LOG(ERR, "port %u request failed on secondary #%d", + dev->data->port_id, i); + goto exit; + } + } +exit: + free(mp_rep.msgs); +} + +/** + * Broadcast request of starting data-path to secondary processes. The request + * is synchronous. + * + * @param[in] dev + * Pointer to Ethernet structure. + */ +void +mlx5_mp_req_start_rxtx(struct rte_eth_dev *dev) +{ + mp_req_on_rxtx(dev, MLX5_MP_REQ_START_RXTX); +} + +/** + * Broadcast request of stopping data-path to secondary processes. The request + * is synchronous. + * + * @param[in] dev + * Pointer to Ethernet structure. + */ +void +mlx5_mp_req_stop_rxtx(struct rte_eth_dev *dev) +{ + mp_req_on_rxtx(dev, MLX5_MP_REQ_STOP_RXTX); +} + +/** + * Request Memory Region creation to the primary process. + * + * @param[in] dev + * Pointer to Ethernet structure. + * @param addr + * Target virtual address to register. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +int +mlx5_mp_req_mr_create(struct rte_eth_dev *dev, uintptr_t addr) +{ + struct rte_mp_msg mp_req; + struct rte_mp_msg *mp_res; + struct rte_mp_reply mp_rep; + struct mlx5_mp_param *req = (struct mlx5_mp_param *)mp_req.param; + struct mlx5_mp_param *res; + struct timespec ts = {.tv_sec = MLX5_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; + int ret; + + assert(rte_eal_process_type() == RTE_PROC_SECONDARY); + mp_init_msg(dev, &mp_req, MLX5_MP_REQ_CREATE_MR); + req->args.addr = addr; + ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); + if (ret) { + DRV_LOG(ERR, "port %u request to primary process failed", + dev->data->port_id); + return -rte_errno; + } + assert(mp_rep.nb_received == 1); + mp_res = &mp_rep.msgs[0]; + res = (struct mlx5_mp_param *)mp_res->param; + ret = res->result; + if (ret) + rte_errno = -ret; + free(mp_rep.msgs); + return ret; +} + +/** + * Request Verbs command file descriptor for mmap to the primary process. + * + * @param[in] dev + * Pointer to Ethernet structure. + * + * @return + * fd on success, a negative errno value otherwise and rte_errno is set. + */ +int +mlx5_mp_req_verbs_cmd_fd(struct rte_eth_dev *dev) +{ + struct rte_mp_msg mp_req; + struct rte_mp_msg *mp_res; + struct rte_mp_reply mp_rep; + struct mlx5_mp_param *res; + struct timespec ts = {.tv_sec = MLX5_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0}; + int ret; + + assert(rte_eal_process_type() == RTE_PROC_SECONDARY); + mp_init_msg(dev, &mp_req, MLX5_MP_REQ_VERBS_CMD_FD); + ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts); + if (ret) { + DRV_LOG(ERR, "port %u request to primary process failed", + dev->data->port_id); + return -rte_errno; + } + assert(mp_rep.nb_received == 1); + mp_res = &mp_rep.msgs[0]; + res = (struct mlx5_mp_param *)mp_res->param; + if (res->result) { + rte_errno = -res->result; + DRV_LOG(ERR, + "port %u failed to get command FD from primary process", + dev->data->port_id); + ret = -rte_errno; + goto exit; + } + assert(mp_res->num_fds == 1); + ret = mp_res->fds[0]; + DRV_LOG(DEBUG, "port %u command FD from primary is %d", + dev->data->port_id, ret); +exit: + free(mp_rep.msgs); + return ret; +} + +/** + * Initialize by primary process. + */ +void +mlx5_mp_init_primary(void) +{ + assert(rte_eal_process_type() == RTE_PROC_PRIMARY); + rte_mp_action_register(MLX5_MP_NAME, mp_primary_handle); +} + +/** + * Un-initialize by primary process. + */ +void +mlx5_mp_uninit_primary(void) +{ + assert(rte_eal_process_type() == RTE_PROC_PRIMARY); + rte_mp_action_unregister(MLX5_MP_NAME); +} + +/** + * Initialize by secondary process. + */ +void +mlx5_mp_init_secondary(void) +{ + assert(rte_eal_process_type() == RTE_PROC_SECONDARY); + rte_mp_action_register(MLX5_MP_NAME, mp_secondary_handle); +} + +/** + * Un-initialize by secondary process. + */ +void +mlx5_mp_uninit_secondary(void) +{ + assert(rte_eal_process_type() == RTE_PROC_SECONDARY); + rte_mp_action_unregister(MLX5_MP_NAME); +} |