From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta8.messagelabs.com (mail6.bemta8.messagelabs.com [216.82.243.55]) by kanga.kvack.org (Postfix) with ESMTP id 9974F6B00EE for ; Mon, 5 Sep 2011 06:43:54 -0400 (EDT) Date: Mon, 5 Sep 2011 12:43:52 +0200 From: Joerg Roedel Subject: Re: [PATCH 6/7] common: dma-mapping: change alloc/free_coherent method to more generic alloc/free_attrs Message-ID: <20110905104352.GD5203@8bytes.org> References: <1314971599-14428-1-git-send-email-m.szyprowski@samsung.com> <1314971599-14428-7-git-send-email-m.szyprowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1314971599-14428-7-git-send-email-m.szyprowski@samsung.com> Sender: owner-linux-mm@kvack.org List-ID: To: Marek Szyprowski Cc: linux-arm-kernel@lists.infradead.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, Kyungmin Park , Arnd Bergmann , Russell King - ARM Linux , Shariq Hasnain , Chunsang Jeong On Fri, Sep 02, 2011 at 03:53:18PM +0200, Marek Szyprowski wrote: > struct dma_map_ops { > - void* (*alloc_coherent)(struct device *dev, size_t size, > - dma_addr_t *dma_handle, gfp_t gfp); > - void (*free_coherent)(struct device *dev, size_t size, > - void *vaddr, dma_addr_t dma_handle); > + void* (*alloc)(struct device *dev, size_t size, > + dma_addr_t *dma_handle, gfp_t gfp, > + struct dma_attrs *attrs); > + void (*free)(struct device *dev, size_t size, > + void *vaddr, dma_addr_t dma_handle, > + struct dma_attrs *attrs); > + int (*mmap)(struct device *, struct vm_area_struct *, > + void *, dma_addr_t, size_t, struct dma_attrs *attrs); > + > dma_addr_t (*map_page)(struct device *dev, struct page *page, > unsigned long offset, size_t size, > enum dma_data_direction dir, > -- > 1.7.1.569.g6f426 This needs conversion of all drivers implementing dma_map_ops or you will break a lot of architectures. A better approach is to keep *_coherent and implement alloc/free/mmap side-by-side until all drivers are converted. Also I miss some documentation about the new call-backs. Joerg -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org