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From: Feifei Wang <feifei.wang2@arm.com>
To: Ruifeng Wang <ruifeng.wang@arm.com>
Cc: dev@dpdk.org, david.hunt@intel.com, david.marchand@redhat.com,
	thomas@monjalon.net, stephen@networkplumber.org, nd@arm.com,
	Feifei Wang <feifei.wang2@arm.com>
Subject: [PATCH v2 1/3] eal: add 8 bits case for wait scheme
Date: Mon,  7 Nov 2022 15:04:47 +0800	[thread overview]
Message-ID: <20221107070449.3319078-2-feifei.wang2@arm.com> (raw)
In-Reply-To: <20221107070449.3319078-1-feifei.wang2@arm.com>

For wait scheme generic helper, add 8 bits case.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 lib/eal/arm/include/rte_pause_64.h | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/lib/eal/arm/include/rte_pause_64.h b/lib/eal/arm/include/rte_pause_64.h
index fe4d42b1ea..c21600ca96 100644
--- a/lib/eal/arm/include/rte_pause_64.h
+++ b/lib/eal/arm/include/rte_pause_64.h
@@ -31,6 +31,25 @@ static inline void rte_pause(void)
 /* Put processor into low power WFE(Wait For Event) state. */
 #define __RTE_ARM_WFE() { asm volatile("wfe" : : : "memory"); }
 
+/*
+ * Atomic exclusive load from addr, it returns the 8-bit content of
+ * *addr while making it 'monitored', when it is written by someone
+ * else, the 'monitored' state is cleared and an event is generated
+ * implicitly to exit WFE.
+ */
+#define __RTE_ARM_LOAD_EXC_8(src, dst, memorder) {       \
+	if (memorder == __ATOMIC_RELAXED) {               \
+		asm volatile("ldxrb %w[tmp], [%x[addr]]"  \
+			: [tmp] "=&r" (dst)               \
+			: [addr] "r" (src)                \
+			: "memory");                      \
+	} else {                                          \
+		asm volatile("ldaxrb %w[tmp], [%x[addr]]" \
+			: [tmp] "=&r" (dst)               \
+			: [addr] "r" (src)                \
+			: "memory");                      \
+	} }
+
 /*
  * Atomic exclusive load from addr, it returns the 16-bit content of
  * *addr while making it 'monitored', when it is written by someone
@@ -111,9 +130,11 @@ static inline void rte_pause(void)
 	} }                                                             \
 
 #define __RTE_ARM_LOAD_EXC(src, dst, memorder, size) {     \
-	RTE_BUILD_BUG_ON(size != 16 && size != 32 &&       \
-		size != 64 && size != 128);                \
-	if (size == 16)                                    \
+	RTE_BUILD_BUG_ON(size != 8 && size != 16 &&        \
+		size != 32 && size != 64 && size != 128);  \
+	if (size == 8)                                    \
+		__RTE_ARM_LOAD_EXC_8(src, dst, memorder)   \
+	else if (size == 16)                               \
 		__RTE_ARM_LOAD_EXC_16(src, dst, memorder)  \
 	else if (size == 32)                               \
 		__RTE_ARM_LOAD_EXC_32(src, dst, memorder)  \
-- 
2.25.1


  reply	other threads:[~2022-11-07  7:05 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-25  6:42 [PATCH v1 0/3] Enable PMD power management on Arm Feifei Wang
2022-08-25  6:42 ` [PATCH v1 1/3] eal: add 8 bits case for wait scheme Feifei Wang
2022-08-25  6:42 ` [PATCH v1 2/3] eal: add power mgmt support on Arm Feifei Wang
2022-08-25  6:42 ` [PATCH v1 3/3] examples/l3fwd-power: enable PMD power mgmt " Feifei Wang
2022-08-29 12:48   ` Hunt, David
2022-10-03  7:12     ` David Marchand
2022-10-11  7:56       ` 回复: " Feifei Wang
2022-10-20 20:41         ` Thomas Monjalon
2022-10-27  9:38           ` 回复: " Feifei Wang
2022-10-20 22:09   ` Stephen Hemminger
2022-10-27  9:43     ` 回复: " Feifei Wang
2022-11-07  7:04 ` [PATCH v2 0/3] Enable PMD power management " Feifei Wang
2022-11-07  7:04   ` Feifei Wang [this message]
2022-11-07  7:04   ` [PATCH v2 2/3] eal: add power mgmt support " Feifei Wang
2022-11-07  7:04   ` [PATCH v2 3/3] examples/l3fwd-power: enable PMD power monitor " Feifei Wang
2022-11-07 16:01     ` Stephen Hemminger
2022-11-08  3:25       ` 回复: " Feifei Wang
2022-11-11  7:26 ` [PATCH v3 0/3] Enable PMD power management " Feifei Wang
2022-11-11  7:26   ` [PATCH v3 1/3] eal: add 8 bits case for wait scheme Feifei Wang
2022-11-11  7:26   ` [PATCH v3 2/3] eal: add power mgmt support on Arm Feifei Wang
2022-11-11  7:26   ` [PATCH v3 3/3] examples/l3fwd-power: enable PMD power monitor " Feifei Wang
2022-11-11  8:22     ` Thomas Monjalon
2022-11-11 10:21       ` 回复: " Feifei Wang
2022-11-11 10:20 ` [PATCH v4 0/4] Enable PMD power management " Feifei Wang
2022-11-11 10:20   ` [PATCH v4 1/4] eal: add 8 bits case for wait scheme Feifei Wang
2022-11-11 10:20   ` [PATCH v4 2/4] eal: add power mgmt support on Arm Feifei Wang
2022-11-11 10:20   ` [PATCH v4 3/4] power: add power monitor support check Feifei Wang
2022-11-11 10:20   ` [PATCH v4 4/4] examples/l3fwd-power: add power monitor wake up API Feifei Wang
2022-12-14  8:14 ` [PATCH v5 0/2] Enable PMD power management on Arm Feifei Wang
2022-12-14  8:14   ` [PATCH v5 1/2] eal: add 8 bits case for wait scheme Feifei Wang
2022-12-14  8:14   ` [PATCH v5 2/2] eal: add power mgmt support on Arm Feifei Wang
2023-02-17 16:23     ` Stephen Hemminger
2023-02-20  1:56       ` 回复: " Feifei Wang
2023-02-17  8:26   ` 回复: [PATCH v5 0/2] Enable PMD power management " Feifei Wang
2023-02-20  8:51 ` [PATCH v6 " Feifei Wang
2023-02-20  8:51   ` [PATCH v6 1/2] eal: add 8 bits case for wait scheme Feifei Wang
2023-02-20  8:51   ` [PATCH v6 2/2] eal: add power mgmt support on Arm Feifei Wang
2023-02-20 12:07   ` [PATCH v6 0/2] Enable PMD power management " David Marchand
2023-02-21  2:37     ` 回复: " Feifei Wang

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