Hi Fengtian, Would you like to let us know how you validate this patch? As I’ve tried just stop -> start VF can make it work again after PF down -> up. Thanks.
From: fengtian....@6wind.com.cn [mailto:fengtian....@6wind.com.cn] On Behalf Of fengtian Guo Sent: Friday, February 24, 2017 4:47 PM To: Lu, Wenzhuo; Olivier Matz; dev@dpdk.org; Zhang, Helin; Ananyev, Konstantin Cc: sta...@dpdk.org; David Marchand Subject: Re:RE: [dpdk-dev] [PATCH] net/ixgbevf: reset hardware when stoppingport Hi, Wenzhuo Sorry, Now I just notice the email is related with me. > Seems the commit log doesn't match the code change. > This change cannot resolve the described problem. The problem is VF doesn't > handle the PF reset event. > Moving the hw_reset from close to stop doesn't help and not necessary. > Because PF has already reset VF stuff during > resetting itself, that's why VF not working anymore. Explain the problem of this issue. 1) it seems VF have to call ixgbe_reset_hw() when it receive PF reset event. it seems VF is client and PF is server and VF has to reset the register on his side, after PF has reset the register on his side. 2) with this patch, when VF receive the event after PF is set link down, it will call ixgbe_reset_hw() in ixgbevf_dev_close(). and we have validate this patch Thanks Fengtian ------------------ Original ------------------ From: "Lu, Wenzhuo"<wenzhuo...@intel.com>; Date: Fri, Feb 24, 2017 01:21 PM To: "Olivier Matz"<olivier.m...@6wind.com>; "dev@dpdk.org"<dev@dpdk.org>; "Zhang, Helin"<helin.zh...@intel.com>; "Ananyev, Konstantin"<konstantin.anan...@intel.com>; Cc: "Guo Fengtian"<fengtian....@6wind.com>; "sta...@dpdk.org"<sta...@dpdk.org>; "David Marchand"<david.march...@6wind.com>; Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: reset hardware when stoppingport Hi Olivier, Fengtian, > -----Original Message----- > From: dev [mailto:dev-boun...@dpdk.org]<mailto:[mailto:dev-boun...@dpdk.org]> > On Behalf Of Olivier Matz > Sent: Thursday, January 12, 2017 12:52 AM > To: dev@dpdk.org<mailto:dev@dpdk.org>; Zhang, Helin; Ananyev, Konstantin > Cc: Guo Fengtian; sta...@dpdk.org<mailto:sta...@dpdk.org>; David Marchand > Subject: [dpdk-dev] [PATCH] net/ixgbevf: reset hardware when stopping port > > From: Guo Fengtian <fengtian....@6wind.com<mailto:fengtian....@6wind.com>> > > When PF triggers a reset, VF port must acknowledge it by calling > ixgbe_reset_hw(). > > Before this patch, the port link status, speed and duplex are invalid (all set > to 0). > > The patch move the call to ixgbe_reset_hw() from ixgbevf_dev_close() to > ixgbevf_dev_stop(), so that after a port restart on the VM, the link status is > properly marked down, with correct speed and duplex. > > Fixes: f0160874c041 ("ixgbe: various updates") > > CC: sta...@dpdk.org<mailto:sta...@dpdk.org> > Signed-off-by: Guo Fengtian > <fengtian....@6wind.com<mailto:fengtian....@6wind.com>> > Signed-off-by: David Marchand > <david.march...@6wind.com<mailto:david.march...@6wind.com>> > Signed-off-by: Olivier Matz > <olivier.m...@6wind.com<mailto:olivier.m...@6wind.com>> > --- > > Hi, > > The use case for this problem was described some time ago, see: > http://dpdk.org/ml/archives/dev/2015-December/030067.html > > It is also part of 2.2 release note: > http://dpdk.org/browse/dpdk/tree/doc/guides/rel_notes/release_2_2.rst#n4 > 71 > > Regards, > Olivier Seems the commit log doesn't match the code change. This change cannot resolve the described problem. The problem is VF doesn't handle the PF reset event. Moving the hw_reset from close to stop doesn't help and not necessary. Because PF has already reset VF stuff during resetting itself, that's why VF not working anymore. > > > drivers/net/ixgbe/ixgbe_ethdev.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c > b/drivers/net/ixgbe/ixgbe_ethdev.c > index b7ddd4f..2d8641a 100644 > --- a/drivers/net/ixgbe/ixgbe_ethdev.c > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c > @@ -4268,6 +4268,7 @@ ixgbevf_dev_stop(struct rte_eth_dev *dev) > PMD_INIT_FUNC_TRACE(); > > ixgbevf_intr_disable(hw); > + ixgbe_reset_hw(hw); > > hw->adapter_stopped = 1; > ixgbe_stop_adapter(hw); > @@ -4294,12 +4295,8 @@ ixgbevf_dev_stop(struct rte_eth_dev *dev) static > void ixgbevf_dev_close(struct rte_eth_dev *dev) { > - struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data- > >dev_private); > - > PMD_INIT_FUNC_TRACE(); > > - ixgbe_reset_hw(hw); > - > ixgbevf_dev_stop(dev); > > ixgbe_dev_free_queues(dev); > -- > 2.8.1
