[dpdk-dev] [PATCH 5/8] net/ice/base: improvements to Flow Director masking

[Zhang, Qi Z]

> -----Original Message-----
> From: Yang, Qiming
> Sent: Friday, September 27, 2019 1:28 PM
> To: Zhang, Qi Z <qi.z.zhang at intel.com>; Lu, Wenzhuo <wenzhuo.lu at intel.com>
> Cc: dev at dpdk.org; Ye, Xiaolong <xiaolong.ye at intel.com>; Nowlin, Dan
> <dan.nowlin at intel.com>; Stillwell Jr, Paul M <paul.m.stillwell.jr at intel.com>
> Subject: RE: [PATCH 5/8] net/ice/base: improvements to Flow Director
> masking
> 
> Hi, Qi
> 
> > -----Original Message-----
> > From: Zhang, Qi Z
> > Sent: Friday, September 27, 2019 12:17 PM
> > To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Yang, Qiming
> > <qiming.yang at intel.com>
> > Cc: dev at dpdk.org; Ye, Xiaolong <xiaolong.ye at intel.com>; Zhang, Qi Z
> > <qi.z.zhang at intel.com>; Nowlin, Dan <dan.nowlin at intel.com>; Stillwell
> > Jr, Paul M <paul.m.stillwell.jr at intel.com>
> > Subject: [PATCH 5/8] net/ice/base: improvements to Flow Director
> > masking
> >
> > Currently, 3-tuple FD matching is implemented using masking. However,
> > this is using up twenty-four of the thirty-two FD masks available.
> > This patch uses the swap register more efficiently to implement the
> > 3-tuple matches, which saves all FD masks for other uses.
> >
> > Added IPV6 versions of DSCP, TTL and Protocol fields for FD use.
> >
> > Signed-off-by: Dan Nowlin <dan.nowlin at intel.com>
> > Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr at intel.com>
> > Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
> > ---
> >  drivers/net/ice/base/ice_flex_pipe.c |  71 +++++++++------------
> >  drivers/net/ice/base/ice_flex_type.h |   4 +-
> >  drivers/net/ice/base/ice_flow.c      | 118
> ++++++++++++++++++++---------------
> >  drivers/net/ice/base/ice_flow.h      |  10 ++-
> >  4 files changed, 108 insertions(+), 95 deletions(-)
> >
> > diff --git a/drivers/net/ice/base/ice_flex_pipe.c
> > b/drivers/net/ice/base/ice_flex_pipe.c
> > index 75bb87079..8f8cab86e 100644
> > --- a/drivers/net/ice/base/ice_flex_pipe.c
> > +++ b/drivers/net/ice/base/ice_flex_pipe.c
> > @@ -1248,25 +1248,6 @@ void ice_free_seg(struct ice_hw *hw)  }
> >
> [snip]
> 
> > @@ -4342,29 +4321,39 @@ ice_update_fd_swap(struct ice_hw *hw, u16
> > prof_id, struct ice_fv_word *es)
> >  		si -= indexes_used;
> >  	}
> >
> > -	/* for each set of 4 swap indexes, write the appropriate register */
> > +	/* for each set of 4 swap and 4 inset indexes, write the appropriate
> > +	 * register
> > +	 */
> >  	for (j = 0; j < hw->blk[ICE_BLK_FD].es.fvw / 4; j++) {
> > -		u32 raw_entry = 0;
> > +		u32 raw_swap = 0;
> > +		u32 raw_in = 0;
> >
> >  		for (k = 0; k < 4; k++) {
> >  			u8 idx;
> >
> >  			idx = (j * 4) + k;
> > -			if (used[idx])
> > -				raw_entry |= used[idx] << (k *
> > BITS_PER_BYTE);
> > +			if (used[idx] && !(mask_sel & BIT(idx))) {
> > +				raw_swap |= used[idx] << (k *
> > BITS_PER_BYTE); #define
> > +ICE_INSET_DFLT 0x9f
> 
> Is this macro defined within this function?

Yes, because its only be used in this function :)

> 
> > +				raw_in |= ICE_INSET_DFLT << (k *
> > BITS_PER_BYTE);
> > +			}
> >  		}
> >
> [snip]
> 
> 
> Qiming