Re: [dpdk-dev] [PATCH v4] net/iavf: fix Tx interrupt vertor configuration error

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

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhang, Qi Z
> Sent: Tuesday, March 26, 2019 3:03 PM
> To: Zhao1, Wei <wei.zhao1@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4] net/iavf: fix Tx interrupt vertor configuration
> error
> 
> 
> 
> > -----Original Message-----
> > From: Zhao1, Wei
> > Sent: Tuesday, March 26, 2019 1:08 PM
> > To: dev@dpdk.org
> > Cc: stable@dpdk.org; Zhang, Qi Z <qi.z.zhang@intel.com>; Zhao1, Wei
> > <wei.zhao1@intel.com>
> > Subject: [PATCH v4] net/iavf: fix Tx interrupt vertor configuration
> > error
> >
> > There is need to align to kernel iavf code when setting Tx queue
> > interrupt vector in messge VIRTCHNL_OP_CONFIG_IRQ_MAP, if not it maybe
> > cause restart iavf port error in some scenario.
> 
> Actually , we are not aligned with kernel iavf's implementation which assume rxq
> = txq
> 
> Reword the commit log as below:
> 
> 	According to latest AVF virtual channel spec, interrupt vector is
>     required to be configured for each Tx queue.
>     The patch implemented the mechanism by assign interrupt vector to
>     each Tx queue with round robin (same method for Rx queue).
>     This also fixed the unexpected Tx queue config error when hosted by
>     ice kernel driver.
> 
> >
> > Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
> >
> 
> Acked-by: Qi Zhang <qi.z.zhang@intel.com>
> 
> Applied to dpdk-next-net-intel with above change.

The patch is dropped due to the limitation is removed from virtual channel, no need to worry about Tx interrupt vector in vf side.


> 
> Thanks
> Qi
> 
> > ---
> >
> > v2:
> > update git log and add new work around
> >
> > v3:
> > update git comment and change fix code as suggestion
> >
> > v4:
> > add txq_map in struct avf_info to keep vector mapping info
> > ---
> >  drivers/net/iavf/iavf.h        | 1 +
> >  drivers/net/iavf/iavf_ethdev.c | 9 +++++++++
> > drivers/net/iavf/iavf_vchnl.c
> > | 2 +-
> >  3 files changed, 11 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h index
> > e6e3e8d..81d0054 100644
> > --- a/drivers/net/iavf/iavf.h
> > +++ b/drivers/net/iavf/iavf.h
> > @@ -107,6 +107,7 @@ struct iavf_info {
> >  	uint16_t msix_base; /* msix vector base from */
> >  	/* queue bitmask for each vector */
> >  	uint16_t rxq_map[IAVF_MAX_MSIX_VECTORS];
> > +	uint16_t txq_map[IAVF_MAX_MSIX_VECTORS];
> >  };
> >
> >  #define IAVF_MAX_PKT_TYPE 256
> > diff --git a/drivers/net/iavf/iavf_ethdev.c
> > b/drivers/net/iavf/iavf_ethdev.c index 846e604..187a31c 100644
> > --- a/drivers/net/iavf/iavf_ethdev.c
> > +++ b/drivers/net/iavf/iavf_ethdev.c
> > @@ -336,6 +336,8 @@ static int iavf_config_rx_queues_irqs(struct
> > rte_eth_dev *dev,
> >  		/* map all queues to the same interrupt */
> >  		for (i = 0; i < dev->data->nb_rx_queues; i++)
> >  			vf->rxq_map[vf->msix_base] |= 1 << i;
> > +		for (i = 0; i < dev->data->nb_tx_queues; i++)
> > +			vf->txq_map[vf->msix_base] |= 1 << i;
> >  	} else {
> >  		if (!rte_intr_allow_others(intr_handle)) {
> >  			vf->nb_msix = 1;
> > @@ -344,6 +346,8 @@ static int iavf_config_rx_queues_irqs(struct
> > rte_eth_dev *dev,
> >  				vf->rxq_map[vf->msix_base] |= 1 << i;
> >  				intr_handle->intr_vec[i] = IAVF_MISC_VEC_ID;
> >  			}
> > +			for (i = 0; i < dev->data->nb_tx_queues; i++)
> > +				vf->txq_map[vf->msix_base] |= 1 << i;
> >  			PMD_DRV_LOG(DEBUG,
> >  				    "vector %u are mapping to all Rx queues",
> >  				    vf->msix_base);
> > @@ -361,6 +365,11 @@ static int iavf_config_rx_queues_irqs(struct
> > rte_eth_dev *dev,
> >  				if (vec >= vf->nb_msix)
> >  					vec = IAVF_RX_VEC_START;
> >  			}
> > +			for (i = 0; i < dev->data->nb_tx_queues; i++) {
> > +				vf->txq_map[vec++] |= 1 << i;
> > +				if (vec >= vf->nb_msix)
> > +					vec = IAVF_RX_VEC_START;
> > +			}
> >  			PMD_DRV_LOG(DEBUG,
> >  				    "%u vectors are mapping to %u Rx queues",
> >  				    vf->nb_msix, dev->data->nb_rx_queues); diff --git
> > a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c index
> > 6381fb6..620e011 100644
> > --- a/drivers/net/iavf/iavf_vchnl.c
> > +++ b/drivers/net/iavf/iavf_vchnl.c
> > @@ -614,7 +614,7 @@ iavf_config_irq_map(struct iavf_adapter *adapter)
> >  		vecmap->vsi_id = vf->vsi_res->vsi_id;
> >  		vecmap->rxitr_idx = IAVF_ITR_INDEX_DEFAULT;
> >  		vecmap->vector_id = vf->msix_base + i;
> > -		vecmap->txq_map = 0;
> > +		vecmap->txq_map = vf->txq_map[vf->msix_base + i];
> >  		vecmap->rxq_map = vf->rxq_map[vf->msix_base + i];
> >  	}
> >
> > --
> > 2.7.5