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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.

  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

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