linux-kernel - Re: [PATCH V4 3/3] vdpa_sim: implement get_iova

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Message-ID: <20201025093442.GD189473@mtl-vdi-166.wap.labs.mlnx>
Date:   Sun, 25 Oct 2020 11:34:43 +0200
From:   Eli Cohen <elic@...dia.com>
To:     Jason Wang <jasowang@...hat.com>
CC:     <mst@...hat.com>, <virtualization@...ts.linux-foundation.org>,
        <linux-kernel@...r.kernel.org>, <rob.miller@...adcom.com>,
        <lingshan.zhu@...el.com>, <eperezma@...hat.com>, <lulu@...hat.com>,
        <shahafs@...lanox.com>, <hanand@...inx.com>,
        <mhabets@...arflare.com>, <gdawar@...inx.com>,
        <saugatm@...inx.com>, <vmireyno@...vell.com>,
        <zhangweining@...jie.com.cn>, <eli@...lanox.com>
Subject: Re: [PATCH V4 3/3] vdpa_sim: implement get_iova_range()

On Fri, Oct 23, 2020 at 05:00:43PM +0800, Jason Wang wrote:
> This implements a sample get_iova_range() for the simulator which
> advertise [0, ULLONG_MAX] as the valid range.
> 
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Reviewed-by: Eli Cohen <elic@...dia.com>

> ---
>  drivers/vdpa/vdpa_sim/vdpa_sim.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 62d640327145..ff6c9fd8d879 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -574,6 +574,16 @@ static u32 vdpasim_get_generation(struct vdpa_device *vdpa)
>  	return vdpasim->generation;
>  }
>  
> +static struct vdpa_iova_range vdpasim_get_iova_range(struct vdpa_device *vdpa)
> +{
> +	struct vdpa_iova_range range = {
> +		.first = 0ULL,
> +		.last = ULLONG_MAX,
> +	};
> +
> +	return range;
> +}
> +
>  static int vdpasim_set_map(struct vdpa_device *vdpa,
>  			   struct vhost_iotlb *iotlb)
>  {
> @@ -657,6 +667,7 @@ static const struct vdpa_config_ops vdpasim_net_config_ops = {
>  	.get_config             = vdpasim_get_config,
>  	.set_config             = vdpasim_set_config,
>  	.get_generation         = vdpasim_get_generation,
> +	.get_iova_range         = vdpasim_get_iova_range,
>  	.dma_map                = vdpasim_dma_map,
>  	.dma_unmap              = vdpasim_dma_unmap,
>  	.free                   = vdpasim_free,
> @@ -683,6 +694,7 @@ static const struct vdpa_config_ops vdpasim_net_batch_config_ops = {
>  	.get_config             = vdpasim_get_config,
>  	.set_config             = vdpasim_set_config,
>  	.get_generation         = vdpasim_get_generation,
> +	.get_iova_range         = vdpasim_get_iova_range,
>  	.set_map                = vdpasim_set_map,
>  	.free                   = vdpasim_free,
>  };
> -- 
> 2.20.1
>