From: Christoph Hellwig <hch@infradead.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Imre Kaloz <kaloz@openwrt.org>,
Krzysztof Halasa <khalasa@piap.pl>,
Russell King - ARM Linux <linux@armlinux.org.uk>
Subject: Re: [PATCH 11/13] ARM: ixp4xx: Drop custom DMA coherency and bouncing
Date: Sun, 30 Jan 2022 22:54:24 -0800 [thread overview]
Message-ID: <YfeHoIHPADwKX0ET@infradead.org> (raw)
In-Reply-To: <CAK8P3a3eqGSZ68smMRdYKOEyghX+tnpfsVqHGYhtFcWTYqf+Pg@mail.gmail.com>
On Thu, Jan 27, 2022 at 11:00:54AM +0100, Arnd Bergmann wrote:
> Maybe we could change the sa1111-ohci driver to use usb_hcd_setup_local_mem(),
> which implements a similar method locally, and then kill off dmabounce for good.
>
> usb_hcd_setup_local_mem() is used on some pxa machines (csb726 with ohci-sm501
> and eseries/tosa with ohci-tmio), though they use it to DMA into a
> small SRAM (8KB
> for tmio, 256KB for sm501) rather than a limited section of DRAM.
That would be awesome.
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next prev parent reply other threads:[~2022-01-31 6:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 0:36 [PATCH 00/13] IXP4xx spring cleaning Linus Walleij
2022-01-27 0:36 ` [PATCH 01/13] ARM: ixp4xx: Delete Gateway 7001 boardfiles Linus Walleij
2022-01-27 0:36 ` [PATCH 02/13] ARM: ixp4xx: Delete the Goramo MLR boardfile Linus Walleij
2022-01-27 0:36 ` [PATCH 03/13] ARM: ixp4xx: Delete old PCI driver Linus Walleij
2022-01-27 0:36 ` [PATCH 04/13] ARM: ixp4xx: Drop stale Kconfig entry Linus Walleij
2022-01-27 0:36 ` [PATCH 05/13] ARM: ixp4xx: Drop UDC info setting function Linus Walleij
2022-01-27 0:36 ` [PATCH 06/13] soc: ixp4xx: Add features from regmap helper Linus Walleij
2022-01-27 0:36 ` [PATCH 07/13] soc: ixp4xx-npe: Access syscon regs using regmap Linus Walleij
2022-01-27 0:36 ` [PATCH 08/13] net: ixp4xx_eth: Drop platform data support Linus Walleij
2022-01-27 0:36 ` [PATCH 09/13] net: ixp4xx_hss: Check features using syscon Linus Walleij
2022-01-27 0:36 ` [PATCH 10/13] ARM: ixp4xx: Remove feature bit accessors Linus Walleij
2022-01-27 0:36 ` [PATCH 11/13] ARM: ixp4xx: Drop custom DMA coherency and bouncing Linus Walleij
2022-01-27 6:38 ` Christoph Hellwig
2022-01-27 10:00 ` Arnd Bergmann
2022-01-31 6:54 ` Christoph Hellwig [this message]
2022-01-27 0:36 ` [PATCH 12/13] ARM: ixp4xx: Drop all common code Linus Walleij
2022-01-27 0:36 ` [PATCH 13/13] ARM: ixp4xx: Convert to SPARSE_IRQ and P2V Linus Walleij
2022-01-27 6:18 ` [PATCH 00/13] IXP4xx spring cleaning Krzysztof Hałasa
2022-01-27 7:55 ` Arnd Bergmann
2022-01-27 12:17 ` Krzysztof Hałasa
2022-01-27 13:11 ` Arnd Bergmann
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