Re: [dpdk-dev] [PATCH v2] net/ixgbe: fix multicast table enable error for VF

["Zhao1, Wei" <wei.zhao1@intel.com>]

Hi，qi

> -----Original Message-----
> From: Zhang, Qi Z
> Sent: Friday, January 4, 2019 8:20 PM
> To: Zhao1, Wei <wei.zhao1@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org; Wu, Jingjing <jingjing.wu@intel.com>
> Subject: RE: [PATCH v2] net/ixgbe: fix multicast table enable error for VF
> 
> 
> 
> > -----Original Message-----
> > From: Zhao1, Wei
> > Sent: Friday, January 4, 2019 4:34 PM
> > To: dev@dpdk.org
> > Cc: stable@dpdk.org; Zhang, Qi Z <qi.z.zhang@intel.com>; Wu, Jingjing
> > <jingjing.wu@intel.com>; Zhao1, Wei <wei.zhao1@intel.com>
> > Subject: [PATCH v2] net/ixgbe: fix multicast table enable error for VF
> >
> > In ixgbe PMD code, all vf ars set with bit IXGBE_VMOLR_ROMPE, which
> > make vf accept packets that match the MTA table, if some vf update
> > IXGBE_MTA in function ixgbe_vf_set_multicast, then all vf will receive
> > packets from these address.
> > So thhere is need to set VMOLR register bit ROPE only after this vf
> > has been set
> 
> s/thhere/there


Sorry， v3 will commit

> 
> > multicast address. If this bit is set when pf host doing
> > initialization, this vf will receive multicast packets with address
> > written in MTA table. Align to ixgbe pf kernel 5.3.7 code to fix this bug.
> 
> Please check my last comment in v1, we need to consider the case to clean all
> multicast filter.

At first, I think we need to clean MTA when unint device, but after test I find that it has been clear after reset of hw reset, so we  do not need to it manually.
 
> 
> >
> > Fixes: 00e30184daa0 ("ixgbe: add PF support")
> >
> > Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
> >
> > ---
> >
> > v2:
> > change patch name and fix typo in log.
> > ---
> >  drivers/net/ixgbe/ixgbe_pf.c | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_pf.c
> > b/drivers/net/ixgbe/ixgbe_pf.c index 4b833ff..0f4b96b 100644
> > --- a/drivers/net/ixgbe/ixgbe_pf.c
> > +++ b/drivers/net/ixgbe/ixgbe_pf.c
> > @@ -351,7 +351,7 @@ ixgbe_vf_reset_event(struct rte_eth_dev *dev,
> > uint16_t vf)
> >  	int rar_entry = hw->mac.num_rar_entries - (vf + 1);
> >  	uint32_t vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
> >
> > -	vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_ROMPE |
> > +	vmolr |= (IXGBE_VMOLR_ROPE |
> >  			IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
> >  	IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
> >
> > @@ -503,6 +503,7 @@ ixgbe_vf_set_multicast(struct rte_eth_dev *dev,
> > uint32_t vf, uint32_t *msgbuf)
> >  	const uint32_t IXGBE_MTA_BIT_MASK = (0x1 <<
> IXGBE_MTA_BIT_SHIFT) -
> > 1;
> >  	uint32_t reg_val;
> >  	int i;
> > +	u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
> >
> >  	/* Disable multicast promiscuous first */
> >  	ixgbe_disable_vf_mc_promisc(dev, vf); @@ -525,6 +526,9 @@
> > ixgbe_vf_set_multicast(struct rte_eth_dev *dev, uint32_t vf, uint32_t
> > *msgbuf)
> >  		IXGBE_WRITE_REG(hw, IXGBE_MTA(mta_idx), reg_val);
> >  	}
> >
> > +	vmolr |= IXGBE_VMOLR_ROMPE;
> > +	IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
> > +
> >  	return 0;
> >  }
> >
> > --
> > 2.7.5