From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752302AbaEBOlv (ORCPT ); Fri, 2 May 2014 10:41:51 -0400 Received: from mail-vc0-f178.google.com ([209.85.220.178]:39485 "EHLO mail-vc0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751406AbaEBOlt (ORCPT ); Fri, 2 May 2014 10:41:49 -0400 MIME-Version: 1.0 In-Reply-To: <20140501132516.GG26756@n2100.arm.linux.org.uk> References: <1398353407-2345-1-git-send-email-santosh.shilimkar@ti.com> <536249D6.3020008@ti.com> <20140501132516.GG26756@n2100.arm.linux.org.uk> Date: Fri, 2 May 2014 09:41:48 -0500 Message-ID: Subject: Re: [PATCH v3 0/7] of: setup dma parameters using dma-ranges and dma-coherent From: Rob Herring To: Russell King - ARM Linux Cc: Santosh Shilimkar , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , Greg Kroah-Hartman , Arnd Bergmann , Olof Johansson , Grant Likely , Rob Herring , Catalin Marinas , Linus Walleij , Grygorii Strashko Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 1, 2014 at 8:25 AM, Russell King - ARM Linux wrote: > On Thu, May 01, 2014 at 09:19:18AM -0400, Santosh Shilimkar wrote: >> Rob, Russell, >> >> On Thursday 24 April 2014 11:30 AM, Santosh Shilimkar wrote: >> > Here is an updated v3 of the series. Series introduces support for setting up >> > dma parameters based on device tree properties like 'dma-ranges' and >> > 'dma-coherent' and also update to ARM 32 bit port. Earlier version of the >> > series can be found here [3], [2] and [1]. >> > >> > 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 update the >> > dma_pfn_offset accordingly during DT the device creation process.The >> > 'dma-coherent' property is used to setup arch's coherent dma_ops. >> > >> > Hopefully with acks, tested-by this version can get into 3.16 queue. I will >> > post a followup series for Keystone SOC which will use this infrastructure. >> > Linus W also wants to use this for ARM integrator platform dma offset issue. >> > >> > 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 (2): >> > of: introduce of_dma_get_range() helper >> > ARM: dma: Use dma_pfn_offset for dma address translation >> > >> > Santosh Shilimkar (5): >> > device: introduce per device dma_pfn_offset >> > of: introduce of_dma_is_coherent() helper >> > of: configure the platform device dma parameters >> > ARM: dma: implement set_arch_dma_coherent_ops() >> > ARM: dma: use phys_addr_t in __dma_page_[cpu_to_dev/dev_to_cpu] >> > >> > arch/arm/include/asm/dma-mapping.h | 28 ++++++++++-- >> > arch/arm/mm/dma-mapping.c | 4 +- >> > drivers/of/address.c | 87 ++++++++++++++++++++++++++++++++++++ >> > drivers/of/platform.c | 71 +++++++++++++++++++++++++++-- >> > include/linux/device.h | 2 + >> > include/linux/dma-mapping.h | 7 +++ >> > include/linux/of_address.h | 8 ++++ >> > include/linux/of_platform.h | 6 +++ >> > 8 files changed, 204 insertions(+), 9 deletions(-) >> > >> How do we go about merging this series ? There is a dependency >> between the patches and hence the question. > > I don't know anymore. People today want to assert exclusive rights over > parts of the kernel tree, which makes this kind of cross-patching rather > impossible. I can take this series or provide an ack for the DT parts. Either way it does not matter to me. > The only workable solution I can see is the long winded way to split the > series up, merge the first set of dependencies in one merge window, and > hold the rest back for the following merge window. Not ideal, but it > stops the arguments. That should not be necessary. We should be able to sort this out as it is not a difficult problem. Rob