From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753138AbaCFJY5 (ORCPT ); Thu, 6 Mar 2014 04:24:57 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:32976 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751650AbaCFJU4 (ORCPT ); Thu, 6 Mar 2014 04:20:56 -0500 From: Santosh Shilimkar To: CC: , , Santosh Shilimkar , Greg Kroah-Hartman , Russell King , Arnd Bergmann , Olof Johansson , Grant Likely , Rob Herring , Catalin Marinas , Linus Walleij , Grygorii Strashko Subject: [PATCH 0/7] of: setup dma parameters using dma-ranges and dma-coherent Date: Thu, 6 Mar 2014 17:19:51 +0800 Message-ID: <1394097598-17622-1-git-send-email-santosh.shilimkar@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Based on comments from [1] discussion, it seems there is a need to have a generic support to configure dma device parameters. Series introduces support for setting up dma parameters based on device tree properties like 'dma-ranges' and 'dma-coherent'. The 'dma-ranges' helps to take care of few DMAable system memory restrictions by use of dma_pfn_offset which we maintain now per device. Arch code then uses it for dma address translations for such cases. We also setup dma_mask accordingly during the device creation process. The 'dma-coherent' property is used to setup coherent dma_ops. Arches which are always coherent can make use of ARCH_IS_DMA_COHERENT to setup coherent dma_ops always irrespective of 'dma-coherent' property. Cc: Greg Kroah-Hartman Cc: Russell King Cc: Arnd Bergmann Cc: Olof Johansson Cc: Grant Likely Cc: Rob Herring Cc: Catalin Marinas Cc: Linus Walleij Cc: Grygorii Strashko Grygorii Strashko (3): of: introduce of_dma_get_range() helper of: configure the platform device dma_mask and dma_pfn_offset ARM: dma: Use dma_pfn_offset for dma address translation Santosh Shilimkar (4): device: introduce per device dma_pfn_offset of: introduce of_dma_is_coherent() helper of: Add set_arch_dma_coherent_ops() and setup coherent dma_ops ARM: dma: implement set_arch_dma_coherent_ops() arch/arm/include/asm/dma-mapping.h | 24 ++++- drivers/of/platform.c | 196 +++++++++++++++++++++++++++++++++++- include/linux/device.h | 2 + include/linux/dma-mapping.h | 7 ++ include/linux/of_platform.h | 14 +++ 5 files changed, 236 insertions(+), 7 deletions(-) Regards, Santosh [1] http://www.spinics.net/lists/arm-kernel/msg311678.html -- 1.7.9.5