net/mlx5: introduce shared UAR resource

This is preparation step before moving the Tx queue creation
to the DevX approach. Some features require the shared UAR
for Tx queues and scheduling completion queues, the patch
manages the shared UAR.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 0786945ce17a55e46df3538c6392ad823506473d..71e59ac589f049d7cea8aff31abc7c9e2d5c6334 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -709,6 +709,12 @@ mlx5_alloc_shared_dev_ctx(const struct mlx5_dev_spawn_data *spawn,
                        err = ENOMEM;
                        goto error;
                }
+               sh->tx_uar = mlx5_glue->devx_alloc_uar(sh->ctx, 0);
+               if (!sh->tx_uar) {
+                       DRV_LOG(ERR, "Failed to allocate DevX UAR.");
+                       err = ENOMEM;
+                       goto error;
+               }
        }
        sh->flow_id_pool = mlx5_flow_id_pool_alloc
                                        ((1 << HAIRPIN_FLOW_ID_BITS) - 1);
@@ -767,6 +773,10 @@ error:
                mlx5_l3t_destroy(sh->cnt_id_tbl);
                sh->cnt_id_tbl = NULL;
        }
+       if (sh->tx_uar) {
+               mlx5_glue->devx_free_uar(sh->tx_uar);
+               sh->tx_uar = NULL;
+       }
        if (sh->tis)
                claim_zero(mlx5_devx_cmd_destroy(sh->tis));
        if (sh->td)
@@ -832,6 +842,10 @@ mlx5_free_shared_dev_ctx(struct mlx5_dev_ctx_shared *sh)
                mlx5_l3t_destroy(sh->cnt_id_tbl);
                sh->cnt_id_tbl = NULL;
        }
+       if (sh->tx_uar) {
+               mlx5_glue->devx_free_uar(sh->tx_uar);
+               sh->tx_uar = NULL;
+       }
        if (sh->pd)
                claim_zero(mlx5_glue->dealloc_pd(sh->pd));
        if (sh->tis)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index d01d7f3c5fe4751a1d8d77eabd1627fc4c820250..c760aff27f6438eb0baa818b47425b9f1d56ed98 100644 (file)
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -586,6 +586,7 @@ struct mlx5_dev_ctx_shared {
        struct mlx5_devx_obj *tis; /* TIS object. */
        struct mlx5_devx_obj *td; /* Transport domain. */
        struct mlx5_flow_id_pool *flow_id_pool; /* Flow ID pool. */
+       struct mlx5dv_devx_uar *tx_uar; /* Tx/packer pacing shared UAR. */
        struct mlx5_dev_shared_port port[]; /* per device port data array. */
 };