From mboxrd@z Thu Jan 1 00:00:00 1970 From: Santosh Shilimkar 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> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org, Grygorii Strashko , Russell King , Arnd Bergmann , Greg Kroah-Hartman , Linus Walleij , Grant Likely , Rob Herring , Santosh Shilimkar , Catalin Marinas , Olof Johansson , linux-arm-kernel@lists.infradead.org List-Id: devicetree@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