From: David Harton <dharton@cisco.com>
To: dev@dpdk.org, wenzhuo.lu@intel.com
Cc: David Harton <dharton@cisco.com>
Subject: [dpdk-dev] [PATCH] net/e1000: update UPDATE_VF_STAT to handle rollover
Date: Tue, 10 Dec 2019 21:48:02 -0500 [thread overview]
Message-ID: <20191211024802.17978-1-dharton@cisco.com> (raw)
Modified UPDATE_VF_STAT to properly handle rollover conditions.
Signed-off-by: David Harton <dharton@cisco.com>
---
drivers/net/e1000/igb_ethdev.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index a3e30dbe5..825663267 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -261,11 +261,15 @@ static int igb_filter_restore(struct rte_eth_dev *dev);
/*
* Define VF Stats MACRO for Non "cleared on read" register
*/
-#define UPDATE_VF_STAT(reg, last, cur) \
-{ \
- u32 latest = E1000_READ_REG(hw, reg); \
- cur += (latest - last) & UINT_MAX; \
- last = latest; \
+#define UPDATE_VF_STAT(reg, last, cur) \
+{ \
+ u32 latest = E1000_READ_REG(hw, reg); \
+ if (latest >= last) \
+ cur += (latest - last); \
+ else \
+ cur += ((latest + ((uint64_t)1 << 32)) - last); \
+ cur &= UINT_MAX; \
+ last = latest; \
}
#define IGB_FC_PAUSE_TIME 0x0680
--
2.19.1
next reply other threads:[~2019-12-11 2:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 2:48 David Harton [this message]
2020-01-26 9:41 ` Ye Xiaolong
2020-01-26 17:25 ` [dpdk-dev] [PATCH v2] " David Harton
2020-01-29 7:53 ` Ye Xiaolong
2020-01-29 10:10 ` Ferruh Yigit
2020-01-29 17:56 ` David Harton (dharton)
2020-01-31 8:46 ` Ye Xiaolong
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