Re: [PATCH v9] block: Add n64 cart driver

Lauri Kasanen
2021-01-22T16:24:14Z

On Fri, 22 Jan 2021 16:18:04 +0000
Christoph Hellwig <hch@infradead.org> wrote:

> On Fri, Jan 22, 2021 at 03:58:01PM +0200, Lauri Kasanen wrote:
> > On Fri, 22 Jan 2021 11:17:27 +0000
> > Christoph Hellwig <hch@infradead.org> wrote:
> >
> > > Sorry for not noticing this earlier, but why do you need the bounce
> > > buffer vs just mapping the data buffer?
> >
> > I think I've answered this once already a few iterations before. DMA
> > alignment restrictions, not sure what guarantees the bio buffer has.
>
> Your driver can communicate the required alignment using the
> blk_queue_update_dma_alignment API.

Is it guaranteed to be physically contiguous?

- Lauri