From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10C7BC433EF for ; Mon, 31 Jan 2022 06:56:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=T0OxlOTg7Oeu3kTOd834m5MWJ6O3BcP2K0jcJumAuUg=; b=sip50LyDs1foWs rKZIITkiVca/rkKQwF3Y9oD8x8nvZt7syDNEpbyDWhCnKja1R7MlytzoQoxmDVaC/Vb0nX+yJ3ZqE jMQlNoHWfj859O/unsbl+tshNMH+Vlq3KmigJj/FXHfG1PlxkY01BeT8JUmnMgizR/6jWHhKQyXBc MI31H6mGCLlUGLwOB9lY8aBzuFoQt2YuOxJwHvrTzG8dYJQ3uOUo69QdFqDE0Oz46BbgxKU4Pk/qW 14T9c6DgcGA7t5HUxrKGUMkizBV/w3lf9R9pvSTGRHlRb1P0J1IObNVBTRuCrzt+oSDVjtaVFz+Jd NpeIDtbfC0fBA+q39Mnw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nEQa4-008CX8-Eh; Mon, 31 Jan 2022 06:54:28 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nEQa0-008CVm-1J; Mon, 31 Jan 2022 06:54:24 +0000 Date: Sun, 30 Jan 2022 22:54:24 -0800 From: Christoph Hellwig To: Arnd Bergmann Cc: Linus Walleij , Linux ARM , Imre Kaloz , Krzysztof Halasa , Russell King - ARM Linux Subject: Re: [PATCH 11/13] ARM: ixp4xx: Drop custom DMA coherency and bouncing Message-ID: References: <20220127003656.330161-1-linus.walleij@linaro.org> <20220127003656.330161-12-linus.walleij@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel