[dpdk-dev] [PATCH v4 05/22] event/dlb: add inline functions

[Timothy McDaniel <timothy.mcdaniel@intel.com>]

Add miscellaneous inline functions that may be called
from multiple files.  These functions include inline
assembly of new x86 instructions, such as movdir64b,
since they are not available as builtin functions in
the minimum supported GCC version.

Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
---
 drivers/event/dlb/dlb_inline_fns.h | 79 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 drivers/event/dlb/dlb_inline_fns.h

diff --git a/drivers/event/dlb/dlb_inline_fns.h b/drivers/event/dlb/dlb_inline_fns.h
new file mode 100644
index 0000000..1aa5449
--- /dev/null
+++ b/drivers/event/dlb/dlb_inline_fns.h
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2020 Intel Corporation
+ */
+
+#include "rte_memcpy.h"
+#include "rte_io.h"
+
+/* Inline functions required in more than one source file. */
+
+static inline struct dlb_eventdev *
+dlb_pmd_priv(const struct rte_eventdev *eventdev)
+{
+	return eventdev->data->dev_private;
+}
+
+static inline void
+dlb_umonitor(volatile void *addr)
+{
+	asm volatile(".byte 0xf3, 0x0f, 0xae, 0xf7\t\n"
+			:
+			: "D" (addr));
+}
+
+static inline void
+dlb_umwait(int state, uint64_t timeout)
+{
+	uint32_t eax = timeout & UINT32_MAX;
+	uint32_t edx = timeout >> 32;
+
+	asm volatile(".byte 0xf2, 0x0f, 0xae, 0xf7\t\n"
+			:
+			: "D" (state),  "a" (eax), "d" (edx));
+}
+
+static inline void
+dlb_movntdq(void *dest, void *src)
+{
+	/* Move entire 64B cache line of QEs, 128 bits (16B) at a time. */
+	long long *_src  = (long long *)src;
+	__v2di src_data0 = (__v2di){_src[0], _src[1]};
+	__v2di src_data1 = (__v2di){_src[2], _src[3]};
+	__v2di src_data2 = (__v2di){_src[4], _src[5]};
+	__v2di src_data3 = (__v2di){_src[6], _src[7]};
+
+	__builtin_ia32_movntdq((__v2di *)dest + 0, (__v2di)src_data0);
+	rte_wmb();
+	__builtin_ia32_movntdq((__v2di *)dest + 1, (__v2di)src_data1);
+	rte_wmb();
+	__builtin_ia32_movntdq((__v2di *)dest + 2, (__v2di)src_data2);
+	rte_wmb();
+	__builtin_ia32_movntdq((__v2di *)dest + 3, (__v2di)src_data3);
+	rte_wmb();
+}
+
+static inline void
+dlb_movntdq_single(void *dest, void *src)
+{
+	long long *_src  = (long long *)src;
+	__v2di src_data0 = (__v2di){_src[0], _src[1]};
+
+	__builtin_ia32_movntdq((__v2di *)dest, (__v2di)src_data0);
+}
+
+static inline void
+dlb_cldemote(void *addr)
+{
+	/* Load addr into RSI, then demote the cache line of the address
+	 * contained in that register.
+	 */
+	asm volatile(".byte 0x0f, 0x1c, 0x06" :: "S" (addr));
+}
+
+static inline void
+dlb_movdir64b(void *dest, void *src)
+{
+	asm volatile(".byte 0x66, 0x0f, 0x38, 0xf8, 0x02"
+		     :
+		     : "a" (dest), "d" (src));
+}
-- 
2.6.4