From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Fri, 14 Nov 2014 18:56:29 +0000 Subject: [RFC PATCH v4 0/8] Introduce automatic DMA configuration for IOMMU masters Message-ID: <1415991397-9618-1-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello everybody, Here is the fourth iteration of the RFC I've previously posted here: RFCv1: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-August/283023.html RFCv2: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/283752.html RFCv3: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/287031.html Changes since RFCv3 include: - Drastic simplification of the data structures, so that we no longer pass around lists of domains. Instead, dma-mapping is expected to allocate the domain (Joerg talked about adding a get_default_domain operation to iommu_ops). - iommu_ops is used to hold the per-instance IOMMU data - Configuration of DMA segments added to of_dma_configure All feedback welcome. Cheers, Will --->8 Will Deacon (8): iommu: provide early initialisation hook for IOMMU drivers dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops iommu: add new iommu_ops callback for adding an OF device iommu: provide helper function to configure an IOMMU for an of master dma-mapping: detect and configure IOMMU in of_dma_configure dma-mapping: set dma segment properties in of_dma_configure arm: call iommu_init before of_platform_populate arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops arch/arm/include/asm/dma-mapping.h | 12 +++--- arch/arm/kernel/setup.c | 2 + arch/arm/mm/dma-mapping.c | 80 ++++++++++++++++++++++++++++++++++---- drivers/iommu/Kconfig | 2 +- drivers/iommu/of_iommu.c | 50 ++++++++++++++++++++++++ drivers/of/platform.c | 54 +++++++++++++------------ include/asm-generic/vmlinux.lds.h | 2 + include/linux/amba/bus.h | 1 + include/linux/dma-mapping.h | 13 ++++--- include/linux/iommu.h | 8 ++++ include/linux/of_iommu.h | 31 +++++++++++++++ include/linux/platform_device.h | 2 + 12 files changed, 214 insertions(+), 43 deletions(-) -- 2.1.1