Virtualization - Sep 2022 - [PATCH v5] vdpa/ifcvf: fix the calculation of queuepair

On Fri, Sep 23, 2022 at 05:12:18PM +0800, Angus Chen
wrote:
> The q_pair_id to address a queue pair in the lm bar should be
> calculated by queue_id / 2 rather than queue_id / nr_vring.
> 
> changes in v2:
> 	- add commitid which to be fixed
> 	- Acked by Zhu Lingshan <lingshan.zhu at intel.com>
> 	- no code changes
> 
> changes in v3:
> 	- updated commit log with more info, addressing comments by MST
> 	- no code changes
> 
> changes in v4:
> 	- updated commit log with Correct syntax, addressing comments by
> 	- Zhu,Lingsha and MST and Jason Wang <jasowang at redhat.com>
> 	- no code changes
> 
> changes in v5:
> 	- add Acked and reviewed log of community
changelog after --- pls. if you want to keep changelog in git,
you add it in a note in git, not in commit log.

I can fix that no need to repost.
> Fixes: 2ddae773c93b ("vDPA/ifcvf: detect and use the onboard number of
queues directly")
> Signed-off-by: Angus Chen <angus.chen at jaguarmicro.com>
> Reviewed-by: Jason Wang <jasowang at redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst at redhat.com>
> Acked-by: Zhu Lingshan <lingshan.zhu at intel.com>
> ---
>  drivers/vdpa/ifcvf/ifcvf_base.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c
b/drivers/vdpa/ifcvf/ifcvf_base.c
> index 75a703b803a2..3e4486bfa0b7 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_base.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_base.c
> @@ -323,7 +323,7 @@ u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
>  	u32 q_pair_id;
>  
>  	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
> -	q_pair_id = qid / hw->nr_vring;
> +	q_pair_id = qid / 2;
>  	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid %
2];
>  	last_avail_idx = vp_ioread16(avail_idx_addr);
>  
> @@ -337,7 +337,7 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid,
u16 num)
>  	u32 q_pair_id;
>  
>  	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
> -	q_pair_id = qid / hw->nr_vring;
> +	q_pair_id = qid / 2;
>  	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid %
2];
>  	hw->vring[qid].last_avail_idx = num;
>  	vp_iowrite16(num, avail_idx_addr);
> -- 
> 2.17.1