On Mon, Feb 26, 2024 at 07:39:09PM +0800, Xuan Zhuo wrote:
> On Mon, 26 Feb 2024 06:36:53 -0500, "Michael S. Tsirkin" <mst@xxxxxxxxxx> 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.
>
which hash?
> >
> > --
> > MST
> >
