[PATCH v4 4/8] vdpa/ifc: write queue count to MQ register

[Xia, Chenbo]

> -----Original Message-----
> From: Pei, Andy <andy.pei at intel.com>
> Sent: Thursday, October 13, 2022 4:45 PM
> To: dev at dpdk.org
> Cc: Xia, Chenbo <chenbo.xia at intel.com>; Xu, Rosen <rosen.xu at intel.com>;
> Huang, Wei <wei.huang at intel.com>; Cao, Gang <gang.cao at intel.com>;
> maxime.coquelin at redhat.com
> Subject: [PATCH v4 4/8] vdpa/ifc: write queue count to MQ register
> 
> Write queue count to IFCVF_MQ_OFFSET register
> to enable multi-queue feature.
> 
> Signed-off-by: Andy Pei <andy.pei at intel.com>
> Signed-off-by: Huang Wei <wei.huang at intel.com>
> ---
>  drivers/vdpa/ifc/base/ifcvf.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
> index 81c68c0..60c7017 100644
> --- a/drivers/vdpa/ifc/base/ifcvf.c
> +++ b/drivers/vdpa/ifc/base/ifcvf.c
> @@ -202,6 +202,37 @@
>  	IFCVF_WRITE_REG32(val >> 32, hi);
>  }
> 
> +STATIC void
> +ifcvf_enable_mq(struct ifcvf_hw *hw)
> +{
> +	u8 *mq_cfg;
> +	u8 qid;
> +	int nr_queue = 0;
> +
> +	for (qid = 0; qid < hw->nr_vring; qid++) {
> +		if (!hw->vring[qid].enable)
> +			continue;
> +		nr_queue++;
> +	}
> +
> +	if (nr_queue == 0) {
> +		WARNINGOUT("no enabled vring\n");
> +		return;
> +	}
> +
> +	mq_cfg = hw->mq_cfg;
> +	if (mq_cfg) {
> +		if (hw->device_type == IFCVF_BLK) {
> +			*(u32 *)mq_cfg = nr_queue;
> +			RTE_LOG(INFO, PMD, "%d queue are enabled\n", nr_queue);

queue -> queues

With this fixed:

Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>

> +		} else {
> +			*(u32 *)mq_cfg = nr_queue / 2;
> +			RTE_LOG(INFO, PMD, "%d queue pairs are enabled\n",
> +				nr_queue / 2);
> +		}
> +	}
> +}
> +
>  STATIC int
>  ifcvf_hw_enable(struct ifcvf_hw *hw)
>  {
> @@ -219,6 +250,7 @@
>  		return -1;
>  	}
> 
> +	ifcvf_enable_mq(hw);
>  	for (i = 0; i < hw->nr_vring; i++) {
>  		IFCVF_WRITE_REG16(i, &cfg->queue_select);
>  		io_write64_twopart(hw->vring[i].desc, &cfg->queue_desc_lo,
> --
> 1.8.3.1