Re: [dpdk-dev] [PATCH] net/iavf: fix vector mapping with queue

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Xing, Beilei
> Sent: Thursday, January 28, 2021 11:32 AM
> To: Wu, Jingjing <jingjing.wu@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] net/iavf: fix vector mapping with queue
> 
> 
> 
> > -----Original Message-----
> > From: Wu, Jingjing <jingjing.wu@intel.com>
> > Sent: Thursday, January 28, 2021 10:37 AM
> > To: dev@dpdk.org
> > Cc: Wu, Jingjing <jingjing.wu@intel.com>; Xing, Beilei
> > <beilei.xing@intel.com>; stable@dpdk.org
> > Subject: [PATCH] net/iavf: fix vector mapping with queue
> >
> > Fix the vector mapping with queue by changing the recircle when
> > exceeds RX_VEC_START + nb_msix;
> >
> > Fixes: d6bde6b5eae9 ("net/avf: enable Rx interrupt")
> >
> > Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
> > ---
> >  drivers/net/iavf/iavf_ethdev.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/iavf/iavf_ethdev.c
> > b/drivers/net/iavf/iavf_ethdev.c index cf6ea0b15..eb800771d 100644
> > --- a/drivers/net/iavf/iavf_ethdev.c
> > +++ b/drivers/net/iavf/iavf_ethdev.c
> > @@ -612,7 +612,7 @@ static int iavf_config_rx_queues_irqs(struct
> > rte_eth_dev *dev,
> >  			/* If Rx interrupt is reuquired, and we can use
> >  			 * multi interrupts, then the vec is from 1
> >  			 */
> > -			vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors,
> > +			vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors - 1,
> >  					      intr_handle->nb_efd);
> >  			vf->msix_base = IAVF_RX_VEC_START;
> >  			vec = IAVF_RX_VEC_START;
> > @@ -620,7 +620,7 @@ static int iavf_config_rx_queues_irqs(struct
> > rte_eth_dev *dev,
> >  				qv_map[i].queue_id = i;
> >  				qv_map[i].vector_id = vec;
> >  				intr_handle->intr_vec[i] = vec++;
> > -				if (vec >= vf->nb_msix)
> > +				if (vec >= vf->nb_msix + IAVF_RX_VEC_START)
> >  					vec = IAVF_RX_VEC_START;
> >  			}
> >  			vf->qv_map = qv_map;
> > --
> > 2.21.1
> 
> Acked-by: Beilei Xing <beilei.xing@intel.com>

The patch has some compile warning need to be fixed.

[1/23] Compiling C object drivers/libtmp_rte_net_iavf.a.p/net_iavf_iavf_ethdev.c.o
In file included from ../lib/librte_eal/x86/include/rte_byteorder.h:13,
                 from ../drivers/net/iavf/iavf_ethdev.c:13:
../drivers/net/iavf/iavf_ethdev.c: In function 'iavf_config_rx_queues_irqs':
../lib/librte_eal/include/rte_common.h:577:6: warning: comparison of integer expressions of different signedness: 'int' and 'uint32_t' {aka 'unsigned int'} [-Wsign-compare]
  577 |   _a < _b ? _a : _b; \
      |      ^
../drivers/net/iavf/iavf_ethdev.c:613:18: note: in expansion of macro 'RTE_MIN'
  613 |    vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors - 1,
      |                  ^~~~~~~
../lib/librte_eal/include/rte_common.h:577:13: warning: operand of '?:' changes signedness from 'int' to 'uint32_t' {aka 'unsigned int'} due to unsignedness of other operand [-Wsign-compare]
  577 |   _a < _b ? _a : _b; \
      |             ^~
../drivers/net/iavf/iavf_ethdev.c:613:18: note: in expansion of macro 'RTE_MIN'
  613 |    vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors - 1,
      |                  ^~~~~~~
[23/23] Linking target app/dpdk-test-regex

Regards
Qi