[dpdk-dev] [PATCH v2 04/41] common/mlx5: add mlx5_glue_constructor

[Srikanth Kaka <srikanth.k@oneconvergence.com>]

Defined mlx5_glue_constructor in mlx5_common_os.c to support
run-time dependency on rdma-core

Signed-off-by: Srikanth Kaka <srikanth.k@oneconvergence.com>
Signed-off-by: Vag Singh <vag.singh@oneconvergence.com>
Signed-off-by: Anand Thulasiram <avelu@juniper.net>
---
 drivers/common/mlx5/freebsd/mlx5_common_os.c | 60 ++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 drivers/common/mlx5/freebsd/mlx5_common_os.c

diff --git a/drivers/common/mlx5/freebsd/mlx5_common_os.c b/drivers/common/mlx5/freebsd/mlx5_common_os.c
new file mode 100644
index 0000000000..9c3cd1e4e6
--- /dev/null
+++ b/drivers/common/mlx5/freebsd/mlx5_common_os.c
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2020 Mellanox Technologies, Ltd
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/sysctl.h>
+
+#include <rte_errno.h>
+
+#include "mlx5_common.h"
+#include "mlx5_common_log.h"
+#include "mlx5_glue.h"
+
+/**
+ * Initialization routine for run-time dependency on rdma-core.
+ */
+void
+mlx5_glue_constructor(void)
+{
+	/*
+	 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
+	 * huge pages. Calling ibv_fork_init() during init allows
+	 * applications to use fork() safely for purposes other than
+	 * using this PMD, which is not supported in forked processes.
+	 */
+	setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
+	/* Match the size of Rx completion entry to the size of a cacheline. */
+	if (RTE_CACHE_LINE_SIZE == 128)
+		setenv("MLX5_CQE_SIZE", "128", 0);
+	/*
+	 * MLX5_DEVICE_FATAL_CLEANUP tells ibv_destroy functions to
+	 * cleanup all the Verbs resources even when the device was removed.
+	 */
+	setenv("MLX5_DEVICE_FATAL_CLEANUP", "1", 1);
+
+#ifdef RTE_LIBRTE_MLX5_DEBUG
+	/* Glue structure must not contain any NULL pointers. */
+	{
+		unsigned int i;
+
+		for (i = 0; i != sizeof(*mlx5_glue) / sizeof(void *); ++i)
+			MLX5_ASSERT(((const void *const *)mlx5_glue)[i]);
+	}
+#endif
+	if (strcmp(mlx5_glue->version, MLX5_GLUE_VERSION)) {
+		rte_errno = EINVAL;
+		DRV_LOG(ERR, "rdma-core glue \"%s\" mismatch: \"%s\" is "
+			"required", mlx5_glue->version, MLX5_GLUE_VERSION);
+		goto glue_error;
+	}
+	mlx5_glue->fork_init();
+	return;
+
+glue_error:
+	DRV_LOG(WARNING, "Cannot initialize MLX5 common due to missing"
+		" run-time dependency on rdma-core libraries (libibverbs,"
+		" libmlx5)");
+	mlx5_glue = NULL;
+}
-- 
2.30.2