netdev - Re: [PATCH net-next v4 08/14] sfc: implement vdpa vring config operations

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Date:   Mon, 10 Apr 2023 14:48:41 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Gautam Dawar <gautam.dawar@....com>
Cc:     linux-net-drivers@....com, jasowang@...hat.com,
        Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        eperezma@...hat.com, harpreet.anand@....com, tanuj.kamde@....com,
        koushik.dutta@....com
Subject: Re: [PATCH net-next v4 08/14] sfc: implement vdpa vring config
 operations

On Fri, Apr 07, 2023 at 01:40:09PM +0530, Gautam Dawar wrote:
> This patch implements the vDPA config operations related to
> virtqueues or vrings. These include setting vring address,
> getting vq state, operations to enable/disable a vq etc.
> The resources required for vring operations eg. VI, interrupts etc.
> are also allocated.
> 
> Signed-off-by: Gautam Dawar <gautam.dawar@....com>

...

> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa_ops.c b/drivers/net/ethernet/sfc/ef100_vdpa_ops.c

...

> +static void ef100_vdpa_set_vq_ready(struct vdpa_device *vdev, u16 idx,
> +				    bool ready)
> +{
> +	struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev);
> +
> +	if (is_qid_invalid(vdpa_nic, idx, __func__))
> +		return;
> +
> +	mutex_lock(&vdpa_nic->lock);
> +	if (ready) {
> +		vdpa_nic->vring[idx].vring_state |=
> +					EF100_VRING_READY_CONFIGURED;
> +	} else {
> +		vdpa_nic->vring[idx].vring_state &=
> +					~EF100_VRING_READY_CONFIGURED;
> +	}

nit: the if/else above does not need { }

> +	mutex_unlock(&vdpa_nic->lock);
> +}

...