From: Ophir Munk <ophirmu@nvidia.com>
Date: Mon, 28 Dec 2020 09:54:17 +0000 (+0200)
Subject: common/mlx5: wrap memory allocation on Linux
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=7e7af4e99a9d34e3d8510fe9c57b683ea762cfcc;p=dpdk.git

common/mlx5: wrap memory allocation on Linux

mlx5_malloc() API has an alignment parameter for system memory
allocations. malloc() is called for non-aligned allocations and
posix_memalign() is called for aligned allocations. When calling
mlx5_free() there is no distinction whether the memory was originally
allocated with or without alignment. Freeing a memory may be handled
differently by operating systems. Therefore this commit wraps these APIs
with OS specific calls: mlx5_os_malloc(), mlx5_os_free().

Signed-off-by: Ophir Munk <ophirmu@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---

diff --git a/drivers/common/mlx5/linux/mlx5_common_os.h b/drivers/common/mlx5/linux/mlx5_common_os.h
index f8b215cc29..bd44ecb7d6 100644
--- a/drivers/common/mlx5/linux/mlx5_common_os.h
+++ b/drivers/common/mlx5/linux/mlx5_common_os.h
@@ -6,6 +6,7 @@
 #define RTE_PMD_MLX5_COMMON_OS_H_
 
 #include <stdio.h>
+#include <malloc.h>
 
 #include <rte_pci.h>
 #include <rte_debug.h>
@@ -16,6 +17,7 @@
 
 #include "mlx5_autoconf.h"
 #include "mlx5_glue.h"
+#include "mlx5_malloc.h"
 
 /**
  * Get device name. Given an ibv_device pointer - return a
@@ -224,4 +226,40 @@ mlx5_os_umem_dereg(void *pumem)
 {
 	return mlx5_glue->devx_umem_dereg(pumem);
 }
+
+/**
+ * Memory allocation optionally with alignment.
+ *
+ * @param[in] align
+ *    Alignment size (may be zero)
+ * @param[in] size
+ *    Size in bytes to allocate
+ *
+ * @return
+ *    Valid pointer to allocated memory, NULL in case of failure
+ */
+static inline void *
+mlx5_os_malloc(size_t align, size_t size)
+{
+	void *buf;
+
+	if (posix_memalign(&buf, align, size))
+		return NULL;
+	return buf;
+}
+
+/**
+ * This API de-allocates a memory that originally could have been
+ * allocated aligned or non-aligned. In Linux it is a wrapper
+ * around free().
+ *
+ * @param[in] addr
+ *    Pointer to address to free
+ *
+ */
+static inline void
+mlx5_os_free(void *addr)
+{
+	free(addr);
+}
 #endif /* RTE_PMD_MLX5_COMMON_OS_H_ */
diff --git a/drivers/common/mlx5/mlx5_malloc.c b/drivers/common/mlx5/mlx5_malloc.c
index 5a3267f730..9d30cedbaa 100644
--- a/drivers/common/mlx5/mlx5_malloc.c
+++ b/drivers/common/mlx5/mlx5_malloc.c
@@ -9,6 +9,7 @@
 #include <string.h>
 
 #include "mlx5_common_utils.h"
+#include "mlx5_common_os.h"
 #include "mlx5_malloc.h"
 
 struct mlx5_sys_mem {
@@ -148,14 +149,11 @@ static void *
 mlx5_alloc_align(size_t size, unsigned int align, unsigned int zero)
 {
 	void *buf;
-	int ret;
-
-	ret = posix_memalign(&buf, align, size);
-	if (ret) {
-		DRV_LOG(ERR,
-			"Couldn't allocate buf size=%zu align=%u. Err=%d\n",
-			size, align, ret);
 
+	buf = mlx5_os_malloc(align, size);
+	if (!buf) {
+		DRV_LOG(ERR, "Couldn't allocate buf size=%zu align=%u.",
+			size, align);
 		return NULL;
 	}
 	if (zero)
@@ -264,7 +262,7 @@ mlx5_free(void *addr)
 		__atomic_add_fetch(&mlx5_sys_mem.free_sys, 1,
 				   __ATOMIC_RELAXED);
 #endif
-		free(addr);
+		mlx5_os_free(addr);
 	} else {
 #ifdef RTE_LIBRTE_MLX5_DEBUG
 		__atomic_add_fetch(&mlx5_sys_mem.free_rte, 1,