diff --git a/drivers/common/mlx5/mlx5_common.c b/drivers/common/mlx5/mlx5_common.c
index 91de7b3e2c..8e3ea073e3 100644
--- a/drivers/common/mlx5/mlx5_common.c
+++ b/drivers/common/mlx5/mlx5_common.c
@@ -14,6 +14,7 @@
 #include "mlx5_common.h"
 #include "mlx5_common_os.h"
 #include "mlx5_common_log.h"
+#include "mlx5_common_defs.h"
 #include "mlx5_common_private.h"
 
 uint8_t haswell_broadwell_cpu;
diff --git a/drivers/common/mlx5/mlx5_common_defs.h b/drivers/common/mlx5/mlx5_common_defs.h
new file mode 100644
index 0000000000..6fd30f2c97
--- /dev/null
+++ b/drivers/common/mlx5/mlx5_common_defs.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2021 6WIND S.A.
+ * Copyright 2021 Mellanox Technologies, Ltd
+ */
+
+#ifndef RTE_PMD_MLX5_COMMON_DEFS_H_
+#define RTE_PMD_MLX5_COMMON_DEFS_H_
+
+#include "mlx5_autoconf.h"
+
+/* Size of per-queue MR cache array for linear search. */
+#define MLX5_MR_CACHE_N 8
+
+/* Size of MR cache table for binary search. */
+#define MLX5_MR_BTREE_CACHE_N 256
+
+/*
+ * Defines the amount of retries to allocate the first UAR in the page.
+ * OFED 5.0.x and Upstream rdma_core before v29 returned the NULL as
+ * UAR base address if UAR was not the first object in the UAR page.
+ * It caused the PMD failure and we should try to get another UAR
+ * till we get the first one with non-NULL base address returned.
+ */
+#define MLX5_ALLOC_UAR_RETRY 32
+
+/* Environment variable to control the doorbell register mapping. */
+#define MLX5_SHUT_UP_BF "MLX5_SHUT_UP_BF"
+#if defined(RTE_ARCH_ARM64)
+#define MLX5_SHUT_UP_BF_DEFAULT "0"
+#else
+#define MLX5_SHUT_UP_BF_DEFAULT "1"
+#endif
+
+/* Default PMD specific parameter value. */
+#define MLX5_ARG_UNSET (-1)
+
+/* MLX5_TX_DB_NC supported values. */
+#define MLX5_TXDB_CACHED 0
+#define MLX5_TXDB_NCACHED 1
+#define MLX5_TXDB_HEURISTIC 2
+
+#endif /* RTE_PMD_MLX5_COMMON_DEFS_H_ */
diff --git a/drivers/common/mlx5/mlx5_common_mr.h b/drivers/common/mlx5/mlx5_common_mr.h
index 685ac98e08..15489cd399 100644
--- a/drivers/common/mlx5/mlx5_common_mr.h
+++ b/drivers/common/mlx5/mlx5_common_mr.h
@@ -18,10 +18,7 @@
 
 #include "mlx5_glue.h"
 #include "mlx5_common_mp.h"
-
-/* Size of per-queue MR cache array for linear search. */
-#define MLX5_MR_CACHE_N 8
-#define MLX5_MR_BTREE_CACHE_N 256
+#include "mlx5_common_defs.h"
 
 /* mlx5 PMD MR struct. */
 struct mlx5_pmd_mr {
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index e576e30f24..a7c92c9e40 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -5,18 +5,10 @@
 #ifndef RTE_PMD_MLX5_DEVX_CMDS_H_
 #define RTE_PMD_MLX5_DEVX_CMDS_H_
 
-#include "mlx5_glue.h"
-#include "mlx5_prm.h"
 #include <rte_compat.h>
 
-/*
- * Defines the amount of retries to allocate the first UAR in the page.
- * OFED 5.0.x and Upstream rdma_core before v29 returned the NULL as
- * UAR base address if UAR was not the first object in the UAR page.
- * It caused the PMD failure and we should try to get another UAR
- * till we get the first one with non-NULL base address returned.
- */
-#define MLX5_ALLOC_UAR_RETRY 32
+#include "mlx5_glue.h"
+#include "mlx5_prm.h"
 
 /* This is limitation of libibverbs: in length variable type is u16. */
 #define MLX5_DEVX_MAX_KLM_ENTRIES ((UINT16_MAX - \
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index f441352a63..2e93ce2a3e 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -27,6 +27,7 @@
 #include <mlx5_common_mp.h>
 #include <mlx5_common_mr.h>
 #include <mlx5_common_devx.h>
+#include <mlx5_common_defs.h>
 
 #include "mlx5_defs.h"
 #include "mlx5_utils.h"
@@ -214,9 +215,6 @@ struct mlx5_stats_ctrl {
 	uint64_t imissed;
 };
 
-/* Default PMD specific parameter value. */
-#define MLX5_ARG_UNSET (-1)
-
 #define MLX5_LRO_SUPPORTED(dev) \
 	(((struct mlx5_priv *)((dev)->data->dev_private))->config.lro.supported)
 
diff --git a/drivers/net/mlx5/mlx5_defs.h b/drivers/net/mlx5/mlx5_defs.h
index fe86bb40d3..376e34a946 100644
--- a/drivers/net/mlx5/mlx5_defs.h
+++ b/drivers/net/mlx5/mlx5_defs.h
@@ -9,6 +9,8 @@
 #include <ethdev_driver.h>
 #include <rte_vxlan.h>
 
+#include <mlx5_common_defs.h>
+
 #include "mlx5_autoconf.h"
 
 /* Maximum number of simultaneous VLAN filters. */
@@ -33,13 +35,6 @@
  */
 #define MLX5_TX_COMP_MAX_CQE 2u
 
-
-/* Size of per-queue MR cache array for linear search. */
-#define MLX5_MR_CACHE_N 8
-
-/* Size of MR cache table for binary search. */
-#define MLX5_MR_BTREE_CACHE_N 256
-
 /*
  * If defined, only use software counters. The PMD will never ask the hardware
  * for these, and many of them won't be available.
@@ -121,14 +116,6 @@
 #define MLX5_UAR_MMAP_CMD_SHIFT 8
 #define MLX5_UAR_MMAP_CMD_MASK 0xff
 
-/* Environment variable to control the doorbell register mapping. */
-#define MLX5_SHUT_UP_BF "MLX5_SHUT_UP_BF"
-#if defined(RTE_ARCH_ARM64)
-#define MLX5_SHUT_UP_BF_DEFAULT "0"
-#else
-#define MLX5_SHUT_UP_BF_DEFAULT "1"
-#endif
-
 #ifndef HAVE_MLX5DV_MMAP_GET_NC_PAGES_CMD
 #define MLX5_MMAP_GET_NC_PAGES_CMD 3
 #endif
@@ -161,11 +148,6 @@
 /* Provide info on patrial hw miss. Implies MLX5_XMETA_MODE_META16 */
 #define MLX5_XMETA_MODE_MISS_INFO 3
 
-/* MLX5_TX_DB_NC supported values. */
-#define MLX5_TXDB_CACHED 0
-#define MLX5_TXDB_NCACHED 1
-#define MLX5_TXDB_HEURISTIC 2
-
 /* Tx accurate scheduling on timestamps parameters. */
 #define MLX5_TXPP_WAIT_INIT_TS 1000ul /* How long to wait timestamp. */
 #define MLX5_TXPP_CLKQ_SIZE 1
