[PATCH vhost v2 19/19] virtio_net: sq support premapped mode

[Xuan Zhuo]

On Mon, 26 Feb 2024 06:36:53 -0500, "Michael S. Tsirkin" <mst at redhat.com> wrote:
> On Mon, Feb 26, 2024 at 07:33:29PM +0800, Xuan Zhuo wrote:
> > > what is dma_map_direct? can't find it in the tree.
> >
> > YES.
> >
> >
> > diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
> > index 58db8fd70471..5a8f7a927aa1 100644
> > --- a/kernel/dma/mapping.c
> > +++ b/kernel/dma/mapping.c
> > @@ -144,6 +144,18 @@ static inline bool dma_map_direct(struct device *dev,
> >         return dma_go_direct(dev, *dev->dma_mask, ops);
> >  }
> >
> > +bool dma_is_direct(struct device *dev)
> > +{
> > +       if (!dma_map_direct(dev, ops))
> > +               return false;
> > +
> > +       if (is_swiotlb_force_bounce(dev))
> > +               return false;
> > +
> > +       return true;
> > +}
> > +EXPORT_SYMBOL(dma_unmap_page_attrs);
> > +
> >
> > Thanks.
>
>
> where is it? linux-next?


I see it in the vhost branch kernel/dma/mapping.c.

Maybe you miss it.

Thanks.


>
> --
> MST
>