diff mbox series

[v2,05/24] eal/loongarch: add spinlock operations for LoongArch

Message ID 20220531100245.542300-6-zhoumin@loongson.cn (mailing list archive)
State Superseded, archived
Delegated to: David Marchand
Headers
Series Support LoongArch architecture |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Min Zhou May 31, 2022, 10:02 a.m. UTC 
This patch adds spinlock operations for LoongArch architecture.
These implementations are based on standard atomics of toolchain
and heavily reference generic spinlock codes.

Signed-off-by: Min Zhou <zhoumin@loongson.cn>
---
 lib/eal/loongarch/include/rte_spinlock.h | 90 ++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 lib/eal/loongarch/include/rte_spinlock.h
diff mbox series

Patch

diff --git a/lib/eal/loongarch/include/rte_spinlock.h b/lib/eal/loongarch/include/rte_spinlock.h
new file mode 100644
index 0000000000..9ad46a3c91
--- /dev/null
+++ b/lib/eal/loongarch/include/rte_spinlock.h
@@ -0,0 +1,90 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2022 Loongson Technology Corporation Limited
+ */
+
+#ifndef _RTE_SPINLOCK_LOONGARCH_H_
+#define _RTE_SPINLOCK_LOONGARCH_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_common.h>
+#include "generic/rte_spinlock.h"
+
+#ifndef RTE_FORCE_INTRINSICS
+static inline void
+rte_spinlock_lock(rte_spinlock_t *sl)
+{
+	int exp = 0;
+
+	while (!__atomic_compare_exchange_n(&sl->locked, &exp, 1, 0,
+				__ATOMIC_ACQUIRE, __ATOMIC_RELAXED)) {
+		rte_wait_until_equal_32((volatile uint32_t *)&sl->locked,
+			       0, __ATOMIC_RELAXED);
+		exp = 0;
+	}
+}
+
+static inline void
+rte_spinlock_unlock(rte_spinlock_t *sl)
+{
+	__atomic_store_n(&sl->locked, 0, __ATOMIC_RELEASE);
+}
+
+static inline int
+rte_spinlock_trylock(rte_spinlock_t *sl)
+{
+	int exp = 0;
+	return __atomic_compare_exchange_n(&sl->locked, &exp, 1,
+				0, /* disallow spurious failure */
+				__ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
+}
+#endif
+
+static inline int rte_tm_supported(void)
+{
+	return 0;
+}
+
+static inline void
+rte_spinlock_lock_tm(rte_spinlock_t *sl)
+{
+	rte_spinlock_lock(sl); /* fall-back */
+}
+
+static inline int
+rte_spinlock_trylock_tm(rte_spinlock_t *sl)
+{
+	return rte_spinlock_trylock(sl);
+}
+
+static inline void
+rte_spinlock_unlock_tm(rte_spinlock_t *sl)
+{
+	rte_spinlock_unlock(sl);
+}
+
+static inline void
+rte_spinlock_recursive_lock_tm(rte_spinlock_recursive_t *slr)
+{
+	rte_spinlock_recursive_lock(slr); /* fall-back */
+}
+
+static inline void
+rte_spinlock_recursive_unlock_tm(rte_spinlock_recursive_t *slr)
+{
+	rte_spinlock_recursive_unlock(slr);
+}
+
+static inline int
+rte_spinlock_recursive_trylock_tm(rte_spinlock_recursive_t *slr)
+{
+	return rte_spinlock_recursive_trylock(slr);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_SPINLOCK_LOONGARCH_H_ */