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 0786945..71e59ac 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 d01d7f3..c760aff 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. */
 };