From: Ye Xiaolong <xiaolong.ye@intel.com>
To: David Harton <dharton@cisco.com>
Cc: dev@dpdk.org, wenzhuo.lu@intel.com, konstantin.ananyev@intel.com
Subject: Re: [dpdk-dev] [PATCH] net/ixgbevf: update VF_STAT macros to handle rollover
Date: Sun, 26 Jan 2020 17:42:42 +0800 [thread overview]
Message-ID: <20200126094242.GB54838@intel.com> (raw)
In-Reply-To: <20191211023836.16272-1-dharton@cisco.com>
On 12/10, David Harton wrote:
>Added rollover logic to UPDATE_VF_STAT and UPDATE_VF_STAT_36BIT macros.
>
>Signed-off-by: David Harton <dharton@cisco.com>
>---
> drivers/net/ixgbe/ixgbe_ethdev.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
>index 49285ce53..bc73ad195 100644
>--- a/drivers/net/ixgbe/ixgbe_ethdev.c
>+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
>@@ -385,7 +385,11 @@ static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
> #define UPDATE_VF_STAT(reg, last, cur) \
> { \
> uint32_t latest = IXGBE_READ_REG(hw, reg); \
>- cur += (latest - last) & UINT_MAX; \
>+ if (latest >= last) \
>+ cur += (latest - last); \
>+ else \
>+ cur += ((latest + ((uint64_t)1 << 32)) - last); \
>+ cur &= UINT_MAX; \
> last = latest; \
> }
>
>@@ -394,7 +398,11 @@ static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
> u64 new_lsb = IXGBE_READ_REG(hw, lsb); \
> u64 new_msb = IXGBE_READ_REG(hw, msb); \
> u64 latest = ((new_msb << 32) | new_lsb); \
>- cur += (0x1000000000LL + latest - last) & 0xFFFFFFFFFLL; \
>+ if (latest >= last) \
>+ cur += (latest - last); \
>+ else \
>+ cur += ((latest + ((u64)1 << 36)) - last); \
>+ cur &= 0xFFFFFFFFFLL; \
> last = latest; \
> }
>
>--
>2.19.1
>o
Could you provide Fixes: tag and cc stable?
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>
next prev parent reply other threads:[~2020-01-26 9:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 2:38 [dpdk-dev] [PATCH] net/ixgbevf: update VF_STAT macros to handle rollover David Harton
2020-01-26 9:42 ` Ye Xiaolong [this message]
2020-01-26 17:13 ` Stephen Hemminger
2020-01-26 17:32 ` [dpdk-dev] [PATCH v2] " David Harton
2020-01-29 7:53 ` Ye Xiaolong
2020-01-29 11:22 ` Ferruh Yigit
2020-01-29 17:57 ` David Harton (dharton)
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