From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752824Ab1AXVIX (ORCPT ); Mon, 24 Jan 2011 16:08:23 -0500 Received: from lo.gmane.org ([80.91.229.12]:38085 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751384Ab1AXVIW (ORCPT ); Mon, 24 Jan 2011 16:08:22 -0500 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: linux-kernel@vger.kernel.org To: linux-kernel@vger.kernel.org From: Nikolaus Rath Subject: Coherent DMA mapping for existing struct page Date: Mon, 24 Jan 2011 15:26:37 -0500 Message-ID: <87ipxevyiq.fsf@inspiron.ap.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: ebox.rath.org Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:xjdpzGxUPiOVjbHL1ab7L69VbwQ= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, How do I set up a coherent DMA mapping for an existing struct page? dma_alloc_coherent() wants to allocate its own buffer, and dma_map_page() sets up streaming mappings. Which function am I missing? Thanks, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C