[dpdk-dev] [PATCH v2] net/ixgbe: fix VFIO interrupt mapping in VF

[Dai, Wei]

I look through from web browser and not find following mail from Jianwei Ma <Jianwei.ma at intel.com>
Hope this can add his test result in the mail list to community.

> -----Original Message-----
> From: Ma, Jianwei
> Sent: Tuesday, October 10, 2017 4:47 PM
> To: Dai, Wei <wei.dai at intel.com>; Lu, Wenzhuo <wenzhuo.lu at intel.com>;
> Ananyev, Konstantin <konstantin.ananyev at intel.com>; Liang, Cunming
> <cunming.liang at intel.com>
> Cc: dev at dpdk.org; stable at dpdk.org
> Subject: RE: [PATCH v2] net/ixgbe: fix VFIO interrupt mapping in VF
> 
> Verified with l3fwd-power. It worked well with this patch plus
> http://dpdk.org/dev/patchwork/patch/29000/  " [dpdk-dev] net/ixgbe: fix
> Rx queue interrupt mapping in VF"
> 
> -----Original Message-----
> From: Dai, Wei
> Sent: Tuesday, October 10, 2017 11:30
> To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>; Liang, Cunming
> <cunming.liang at intel.com>; Ma, Jianwei <jianwei.ma at intel.com>
> Cc: dev at dpdk.org; stable at dpdk.org
> Subject: RE: [PATCH v2] net/ixgbe: fix VFIO interrupt mapping in VF
> 
> Hi, Jianwei
> How about your test result ?
> 
> Hi Wenzhuo
> Would you please review this patch ?
> 
> Thanks a lot !
> 
> > -----Original Message-----
> > From: Dai, Wei
> > Sent: Thursday, September 28, 2017 10:29 AM
> > To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev at intel.com>; Liang, Cunming
> > <cunming.liang at intel.com>; Ma, Jianwei <jianwei.ma at intel.com>
> > Cc: dev at dpdk.org; Dai, Wei <wei.dai at intel.com>; stable at dpdk.org
> > Subject: [PATCH v2] net/ixgbe: fix VFIO interrupt mapping in VF
> >
> > When a VF port is bound to VFIO-PIC, only miscellaneous interrupt is
> > mapped to VFIO vector 0 in eth_ixgbevf_dev_init( ).
> > In ixgbevf_dev_start(), if previous VFIO interrupt mapping set in
> > eth_ixgbevf_dev_init( ) is not cleard, it will fail when calling
> > rte_intr_enable( ) tries to map Rx queue interrupt to other VFIO
> > vectors. This patch clears the VFIO interrupt mappings before setting
> > both miscellaneous and Rx queue interrupt mappings again to avoid
> failure.
> >
> > Fixes: 77234603fba0 ("net/ixgbe: support VF mailbox interrupt for link
> > up/down")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Wei Dai <wei.dai at intel.com>
> Tested-by: Jianwei Ma <Jianwei.ma at intel.com>
> > ---
> >  drivers/net/ixgbe/ixgbe_ethdev.c | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > index 9ca5cbc..f49c616 100644
> > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > @@ -5046,6 +5046,15 @@ ixgbevf_dev_start(struct rte_eth_dev *dev)
> >  	}
> >  	ixgbevf_configure_msix(dev);
> >
> > +	/* When a VF port is bound to VFIO-PCI, only miscellaneous interrupt
> > +	 * is mapped to VFIO vector 0 in eth_ixgbevf_dev_init( ).
> > +	 * If previous VFIO interrupt mapping setting in eth_ixgbevf_dev_init( )
> > +	 * is not cleared, it will fail when following rte_intr_enable( ) tries
> > +	 * to map Rx queue interrupt to other VFIO vectors.
> > +	 * So clear uio/vfio intr/evevnfd first to avoid failure.
> > +	 */
> > +	rte_intr_disable(intr_handle);
> > +
> >  	rte_intr_enable(intr_handle);
> >
> >  	/* Re-enable interrupt for VF */
> > --
> > 2.7.5