From: Roy Spliet <r.spliet@ultimaker.com>
To: Boris Brezillon <boris.brezillon@free-electrons.com>,
Linux MTD <linux-mtd@lists.infradead.org>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Linux-sunxi <linux-sunxi@googlegroups.com>
Cc: Brian Norris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>
Subject: [RFC] Add DMA RX support for sunxi nand
Date: Fri, 12 Jun 2015 13:38:47 +0200 [thread overview]
Message-ID: <1434109129-28183-1-git-send-email-r.spliet@ultimaker.com> (raw)
Following are two patches for sunxi nand DMA support. There's a whole phletora
of reasons why these are marked RFC, including:
- Sunxi DMA support still needs to be merged upstream
- Sun7i NAND definitions are not merged upstream
- No TX support
- Bounce buffer size is fixed to 8KB, and I have no idea whether this is sane
- No clustering of DMA requests
- More hw features that we might want to use
Some of this can be addressed in follow-up patches, some can't. I'm just
curious what you think.
Motivation for sending this out anyway: on my set-up this already improves
boot time by approx. 4s, or ~10%. This cheers me up on a sunny Friday afternoon
in the office.
Happy testing and reviewing. Yours,
Roy
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next reply other threads:[~2015-06-12 11:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 11:38 Roy Spliet [this message]
2015-06-12 11:38 ` [RFC 1/2] mtd: nand: sunxi: Add RX DMA support Roy Spliet
2015-06-12 11:38 ` [RFC 2/2] dts: Add Sun7i NAND DMA definitions Roy Spliet
2015-06-13 6:08 ` [RFC] Add DMA RX support for sunxi nand Boris Brezillon
2015-06-14 8:51 ` Boris Brezillon
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