[PATCH v4 18/19] hash: move rte_hash_set_alg out header

[Stephen Hemminger <stephen@networkplumber.org>]

The code for setting algorithm for hash is not at all perf sensitive,
and doing it inline has a couple of problems. First, it means that if
multiple files include the header, then the initialization gets done
multiple times. But also, it makes it harder to fix usage of RTE_LOG().

Despite what the checking script say. This is not an ABI change, the
previous version inlined the same code; therefore both old and new code
will work the same.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/hash/meson.build    |  1 +
 lib/hash/rte_hash_crc.c | 63 +++++++++++++++++++++++++++++++++++++++++
 lib/hash/rte_hash_crc.h | 46 ++----------------------------
 lib/hash/version.map    |  1 +
 4 files changed, 67 insertions(+), 44 deletions(-)
 create mode 100644 lib/hash/rte_hash_crc.c

diff --git a/lib/hash/meson.build b/lib/hash/meson.build
index e56ee8572564..c345c6f561fc 100644
--- a/lib/hash/meson.build
+++ b/lib/hash/meson.build
@@ -19,6 +19,7 @@ indirect_headers += files(
 
 sources = files(
     'rte_cuckoo_hash.c',
+    'rte_hash_crc.c',
     'rte_fbk_hash.c',
     'rte_thash.c',
     'rte_thash_gfni.c'
diff --git a/lib/hash/rte_hash_crc.c b/lib/hash/rte_hash_crc.c
new file mode 100644
index 000000000000..c59eebccb1eb
--- /dev/null
+++ b/lib/hash/rte_hash_crc.c
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+
+#include <rte_cpuflags.h>
+#include <rte_log.h>
+
+#include "rte_hash_crc.h"
+
+/**
+ * Allow or disallow use of SSE4.2/ARMv8 intrinsics for CRC32 hash
+ * calculation.
+ *
+ * @param alg
+ *   An OR of following flags:
+ *   - (CRC32_SW) Don't use SSE4.2/ARMv8 intrinsics (default non-[x86/ARMv8])
+ *   - (CRC32_SSE42) Use SSE4.2 intrinsics if available
+ *   - (CRC32_SSE42_x64) Use 64-bit SSE4.2 intrinsic if available (default x86)
+ *   - (CRC32_ARM64) Use ARMv8 CRC intrinsic if available (default ARMv8)
+ *
+ */
+void
+rte_hash_crc_set_alg(uint8_t alg)
+{
+	crc32_alg = CRC32_SW;
+
+	if (alg == CRC32_SW)
+		return;
+
+#if defined RTE_ARCH_X86
+	if (!(alg & CRC32_SSE42_x64))
+		RTE_LOG(WARNING, HASH,
+			"Unsupported CRC32 algorithm requested using CRC32_x64/CRC32_SSE42\n");
+	if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T) || alg == CRC32_SSE42)
+		crc32_alg = CRC32_SSE42;
+	else
+		crc32_alg = CRC32_SSE42_x64;
+#endif
+
+#if defined RTE_ARCH_ARM64
+	if (!(alg & CRC32_ARM64))
+		RTE_LOG(WARNING, HASH,
+			"Unsupported CRC32 algorithm requested using CRC32_ARM64\n");
+	if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32))
+		crc32_alg = CRC32_ARM64;
+#endif
+
+	if (crc32_alg == CRC32_SW)
+		RTE_LOG(WARNING, HASH,
+			"Unsupported CRC32 algorithm requested using CRC32_SW\n");
+}
+
+/* Setting the best available algorithm */
+RTE_INIT(rte_hash_crc_init_alg)
+{
+#if defined(RTE_ARCH_X86)
+	rte_hash_crc_set_alg(CRC32_SSE42_x64);
+#elif defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
+	rte_hash_crc_set_alg(CRC32_ARM64);
+#else
+	rte_hash_crc_set_alg(CRC32_SW);
+#endif
+}
diff --git a/lib/hash/rte_hash_crc.h b/lib/hash/rte_hash_crc.h
index 0249ad16c5b6..e4acd99a0c81 100644
--- a/lib/hash/rte_hash_crc.h
+++ b/lib/hash/rte_hash_crc.h
@@ -20,8 +20,6 @@ extern "C" {
 #include <rte_branch_prediction.h>
 #include <rte_common.h>
 #include <rte_config.h>
-#include <rte_cpuflags.h>
-#include <rte_log.h>
 
 #include "rte_crc_sw.h"
 
@@ -53,48 +51,8 @@ static uint8_t crc32_alg = CRC32_SW;
  *   - (CRC32_ARM64) Use ARMv8 CRC intrinsic if available (default ARMv8)
  *
  */
-static inline void
-rte_hash_crc_set_alg(uint8_t alg)
-{
-	crc32_alg = CRC32_SW;
-
-	if (alg == CRC32_SW)
-		return;
-
-#if defined RTE_ARCH_X86
-	if (!(alg & CRC32_SSE42_x64))
-		RTE_LOG(WARNING, HASH,
-			"Unsupported CRC32 algorithm requested using CRC32_x64/CRC32_SSE42\n");
-	if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T) || alg == CRC32_SSE42)
-		crc32_alg = CRC32_SSE42;
-	else
-		crc32_alg = CRC32_SSE42_x64;
-#endif
-
-#if defined RTE_ARCH_ARM64
-	if (!(alg & CRC32_ARM64))
-		RTE_LOG(WARNING, HASH,
-			"Unsupported CRC32 algorithm requested using CRC32_ARM64\n");
-	if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32))
-		crc32_alg = CRC32_ARM64;
-#endif
-
-	if (crc32_alg == CRC32_SW)
-		RTE_LOG(WARNING, HASH,
-			"Unsupported CRC32 algorithm requested using CRC32_SW\n");
-}
-
-/* Setting the best available algorithm */
-RTE_INIT(rte_hash_crc_init_alg)
-{
-#if defined(RTE_ARCH_X86)
-	rte_hash_crc_set_alg(CRC32_SSE42_x64);
-#elif defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
-	rte_hash_crc_set_alg(CRC32_ARM64);
-#else
-	rte_hash_crc_set_alg(CRC32_SW);
-#endif
-}
+void
+rte_hash_crc_set_alg(uint8_t alg);
 
 #ifdef __DOXYGEN__
 
diff --git a/lib/hash/version.map b/lib/hash/version.map
index f03b047b2eec..a1d81835399c 100644
--- a/lib/hash/version.map
+++ b/lib/hash/version.map
@@ -9,6 +9,7 @@ DPDK_23 {
 	rte_hash_add_key_with_hash;
 	rte_hash_add_key_with_hash_data;
 	rte_hash_count;
+	rte_hash_crc_set_alg;
 	rte_hash_create;
 	rte_hash_del_key;
 	rte_hash_del_key_with_hash;
-- 
2.39.1