From: Christoph Hellwig <hch@infradead.org>
To: Lauri Kasanen <cand@gmx.com>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-mips@vger.kernel.org, tsbogend@alpha.franken.de,
axboe@kernel.dk, linux-block@vger.kernel.org,
Keith Busch <kbusch@kernel.org>
Subject: Re: [PATCH v9] block: Add n64 cart driver
Date: Fri, 22 Jan 2021 16:18:04 +0000 [thread overview]
Message-ID: <20210122161804.GA225607@infradead.org> (raw)
In-Reply-To: <20210122155801.a24c328b7aefdcffb7d68576@gmx.com>
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.
next prev parent reply other threads:[~2021-01-22 16:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 9:00 [PATCH v9] block: Add n64 cart driver Lauri Kasanen
2021-01-22 11:17 ` Christoph Hellwig
2021-01-22 13:58 ` Lauri Kasanen
2021-01-22 16:18 ` Christoph Hellwig [this message]
2021-01-22 16:23 ` Lauri Kasanen
2021-01-22 16:39 ` Christoph Hellwig
2021-01-22 16:56 ` Lauri Kasanen
2021-01-22 17:08 ` Christoph Hellwig
2021-01-22 17:11 ` Keith Busch
2021-01-22 18:01 ` Lauri Kasanen
2021-01-22 18:20 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210122161804.GA225607@infradead.org \
--to=hch@infradead.org \
--cc=axboe@kernel.dk \
--cc=cand@gmx.com \
--cc=kbusch@kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=tsbogend@alpha.franken.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.