ipc: handle unsupported IPC in sync request

[dpdk.git] / drivers / net / mlx5 / mlx5_mp.c

diff --git a/drivers/net/mlx5/mlx5_mp.c b/drivers/net/mlx5/mlx5_mp.c
index 45dcc30..37f26cc 100644 (file)
--- a/drivers/net/mlx5/mlx5_mp.c
+++ b/drivers/net/mlx5/mlx5_mp.c
@@ -58,6 +58,8 @@ mp_primary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
                (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);
@@ -69,6 +71,13 @@ mp_primary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
        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;
@@ -171,8 +180,9 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx5_mp_req_type type)
        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);
+               if (rte_errno != ENOTSUP)
+                       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) {
@@ -220,6 +230,47 @@ 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.
  *
@@ -270,11 +321,18 @@ exit:
 /**
  * Initialize by primary process.
  */
-void
+int
 mlx5_mp_init_primary(void)
 {
+       int ret;
+
        assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
-       rte_mp_action_register(MLX5_MP_NAME, mp_primary_handle);
+
+       /* primary is allowed to not support IPC */
+       ret = rte_mp_action_register(MLX5_MP_NAME, mp_primary_handle);
+       if (ret && rte_errno != ENOTSUP)
+               return -1;
+       return 0;
 }
 
 /**
@@ -290,11 +348,11 @@ mlx5_mp_uninit_primary(void)
 /**
  * Initialize by secondary process.
  */
-void
+int
 mlx5_mp_init_secondary(void)
 {
        assert(rte_eal_process_type() == RTE_PROC_SECONDARY);
-       rte_mp_action_register(MLX5_MP_NAME, mp_secondary_handle);
+       return rte_mp_action_register(MLX5_MP_NAME, mp_secondary_handle);
 }
 
 /**