common/mlx5: add alloc/dealloc PD on Windows

Implement Windows API mlx5_os_alloc_pd() and mlx5_os_dealloc_pd().
They are equivalent to the Linux implementation in [1].

[1] ("net/mlx5: wrap glue alloc/dealloc PD with OS calls")

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

drivers/common/mlx5/rte_common_mlx5_exports.def

@@ -61,3 +61,6 @@ EXPORTS
 	mlx5_malloc
 	mlx5_realloc
 	mlx5_free
+
+	mlx5_os_alloc_pd
+	mlx5_os_dealloc_pd

drivers/common/mlx5/windows/mlx5_common_os.c

@@ -21,3 +21,51 @@ void
 mlx5_glue_constructor(void)
 {
 }
+
+/**
+ * Allocate PD. Given a devx context object
+ * return an mlx5-pd object.
+ *
+ * @param[in] ctx
+ *   Pointer to context.
+ *
+ * @return
+ *    The mlx5_pd if pd is valid, NULL and errno otherwise.
+ */
+void *
+mlx5_os_alloc_pd(void *ctx)
+{
+	struct mlx5_pd *ppd =  mlx5_malloc(MLX5_MEM_ZERO,
+		sizeof(struct mlx5_pd), 0, SOCKET_ID_ANY);
+	if (!ppd)
+		return NULL;
+
+	struct mlx5_devx_obj *obj = mlx5_devx_cmd_alloc_pd(ctx);
+	if (!obj) {
+		mlx5_free(ppd);
+		return NULL;
+	}
+	ppd->obj = obj;
+	ppd->pdn = obj->id;
+	ppd->devx_ctx = ctx;
+	return ppd;
+}
+
+/**
+ * Release PD. Releases a given mlx5_pd object
+ *
+ * @param[in] pd
+ *   Pointer to mlx5_pd.
+ *
+ * @return
+ *    Zero if pd is released successfully, negative number otherwise.
+ */
+int
+mlx5_os_dealloc_pd(void *pd)
+{
+	if (!pd)
+		return -EINVAL;
+	mlx5_devx_cmd_destroy(((struct mlx5_pd *)pd)->obj);
+	mlx5_free(pd);
+	return 0;
+}

drivers/common/mlx5/windows/mlx5_common_os.h

@@ -139,4 +139,7 @@ mlx5_os_get_umem_id(void *umem)
 		return 0;
 	return ((struct mlx5_devx_umem *)umem)->umem_id;
 }
+
+void *mlx5_os_alloc_pd(void *ctx);
+int mlx5_os_dealloc_pd(void *pd);
 #endif /* RTE_PMD_MLX5_COMMON_OS_H_ */

drivers/common/mlx5/windows/mlx5_win_ext.h

@@ -28,6 +28,12 @@ struct mlx5_devx_umem {
 	uint32_t                umem_id;
 };
 
+struct mlx5_pd {
+	void                   *obj;
+	uint32_t                pdn;
+	devx_device_ctx        *devx_ctx;
+};
+
 #define GET_DEVX_CTX(ctx) (((mlx5_context_st *)ctx)->devx_ctx)
 #define GET_OBJ_CTX(obj)  (((mlx5_devx_obj_st *)obj)->devx_ctx)