From: Tomer Tayar
Implement the calls to the dma-buf kernel api to create a dma-buf
object backed by FD.
We block the option to mmap the DMA-BUF object because we don't support
DIRECT_IO and implicit P2P. We only implement support for explicit P2P
through importing the FD of the DMA-BUF.
In the
On Mon, Jul 05, 2021 at 04:03:14PM +0300, Oded Gabbay wrote:
> + rc = sg_alloc_table(*sgt, nents, GFP_KERNEL | __GFP_ZERO);
> + if (rc)
> + goto error_free;
If you are not going to include a CPU list then I suggest setting
sg_table->orig_nents == 0
And using only the nents wh
On Mon, Jul 5, 2021 at 7:52 PM Jason Gunthorpe wrote:
>
> On Mon, Jul 05, 2021 at 04:03:14PM +0300, Oded Gabbay wrote:
>
> > + rc = sg_alloc_table(*sgt, nents, GFP_KERNEL | __GFP_ZERO);
> > + if (rc)
> > + goto error_free;
>
> If you are not going to include a CPU list then I s
On Tue, Jul 06, 2021 at 12:44:49PM +0300, Oded Gabbay wrote:
> > > + /* In case we got a large memory area to export, we need to divide
> > > it
> > > + * to smaller areas because each entry in the dmabuf sgt can only
> > > + * describe unsigned int.
> > > + */
> >
> > Huh? Thi
On Tue, Jul 6, 2021, 16:54 Jason Gunthorpe wrote:
> On Tue, Jul 06, 2021 at 12:44:49PM +0300, Oded Gabbay wrote:
>
> > > > + /* In case we got a large memory area to export, we need to
> divide it
> > > > + * to smaller areas because each entry in the dmabuf sgt can
> only
> > > > +
