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Message-ID: <20160725055330.GA21004@arm.com> Date: Mon, 25 Jul 2016 13:53:32 +0800 From: Dennis Chen <dennis.chen@....com> To: Lorenzo Pieralisi <lorenzo.pieralisi@....com> CC: <iommu@...ts.linux-foundation.org>, Will Deacon <will.deacon@....com>, Marc Zyngier <marc.zyngier@....com>, Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Tomasz Nowicki <tn@...ihalf.com>, Hanjun Guo <hanjun.guo@...aro.org>, "Jon Masters" <jcm@...hat.com>, Sinan Kaya <okaya@...eaurora.org>, <linux-acpi@...r.kernel.org>, <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <nd@....com> Subject: Re: [RFC PATCH v3 00/13] ACPI IORT ARM SMMU v3 support Hi On Wed, Jul 20, 2016 at 12:23:22PM +0100, Lorenzo Pieralisi wrote: > This RFC patch series is v3 of a previous posting: > > https://lkml.org/lkml/2016/6/7/523 > > v2 -> v3 > - Rebased on top of dependencies series [1][2][3](v4.7-rc3) > - Added back reliance on ACPI early probing infrastructure > - Patch[1-3] merged through other dependent series > - Added back IOMMU fwnode generalization > - Move SMMU v3 static functions configuration to IORT code > - Implemented generic IOMMU fwspec API > - Added code to implement fwnode platform device look-up > > v1 -> v2: > - Rebased on top of dependencies series [1][2][3](v4.7-rc1) > - Removed IOMMU fwnode generalization > - Implemented ARM SMMU v3 ACPI probing instead of ARM SMMU v2 > owing to patch series dependencies [1] > - Moved platform device creation logic to IORT code to > generalize its usage for ARM SMMU v1-v2-v3 components > - Removed reliance on ACPI early device probing > - Created IORT specific iommu_xlate() translation hook leaving > OF code unchanged according to v1 reviews > > The ACPI IORT table provides information that allows instantiating > ARM SMMU devices and carrying out id mappings between components on > ARM based systems (devices, IOMMUs, interrupt controllers). > > http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf > > Building on basic IORT support, available through [2]: > > this patchset enables ARM SMMU v3 support on ACPI systems. > > Most of the code is aimed at building the required generic ACPI > infrastructure to create and enable IOMMU components and to bring > the IOMMU infrastructure for ACPI on par with DT, which is going to > make future ARM SMMU components easier to integrate. > > PATCH (1) adds a FWNODE_IOMMU type to the struct fwnode_handle type. > It is required to attach a fwnode identifier to platform > devices allocated/detected through IORT tables entries; > IOMMU devices have to have an identifier to look them up > eg IOMMU core layer carrying out id translation. This can be > done through a fwnode_handle (ie IOMMU platform devices created > out of IORT tables are not ACPI devices hence they can't be > allocated as such, otherwise they would have a fwnode_handle of > type FWNODE_ACPI). This patch requires discussion and it is key > to the RFC. > > PATCH (2) makes use of the ACPI early probing API to add a linker script > section for probing devices via IORT ACPI kernel code. > > PATCH (3) provides IORT support for registering IOMMU IORT node through > their fwnode handle. > > PATCH (4) implements core code fwnode based platform devices look-up. > > PATCH (5) extends iommu_fwspec so that it can be used on ACPI based > system by creating a generic IOMMU fwspec kernel layer. > > PATCH (6) implements the of_dma_configure() API in ACPI world - > acpi_dma_configure() - and patches PCI and ACPI core code to > start making use of it. > > PATCH (7) provides an IORT function to detect existence of specific type > of IORT components. > > PATCH (8) creates the kernel infrastructure required to create ARM SMMU > platform devices for IORT nodes. > > PATCH (9) refactors the ARM SMMU v3 driver so that the init functions are > split in a way that groups together code that probes through DT > and code that carries out HW registers FW agnostic probing, in > preparation for adding the ACPI probing path. > > PATCH (10) rework ARM SMMU v3 platform driver registration to make it work > on ACPI systems. > > PATCH (11) Building on patch (8), it adds ARM SMMU v3 IORT IOMMU > operations to create and probe ARM SMMU v3 components. > > PATCH (12) Extend the IORT iort_node_map_rid() to work on a type mask > instead of a single type so that the translation API can > be used on a range of components. > > PATCH (13) provides IORT infrastructure to carry out IOMMU configuration > for devices and hook it up to the previously introduced ACPI > DMA configure API. > > This patchset is built on top and depends on these three patch series: > > [1] R.Murphy "Generic DT bindings for PCI and ARM SMMU v3" v4 > https://marc.info/?l=devicetree&m=146739193215518&w=2 > > [2] T.Nowicki "Introduce ACPI world to ITS irqchip" v7 > https://marc.info/?l=linux-arm-kernel&m=146642080022289&w=2 > > [3] T.Nowicki "Support for ARM64 ACPI based PCI host controller" v8 > http://marc.info/?l=linux-acpi&m=146462129816292&w=2 > > and is provided for early review/testing purposes here: > > git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git acpi/iort-smmu-v3i > I thought I can got all the 13 patches applied with the above git tree, but I can't find any ACPI related stuff after I cloned the git repos to my local machine, am I missing something here? Thanks, Dennis > > Tested on FVP models for ARM SMMU v3 probing path. > > Lorenzo Pieralisi (13): > drivers: iommu: add FWNODE_IOMMU fwnode type > drivers: acpi: iort: introduce linker section for IORT entries probing > drivers: acpi: iort: add support for IOMMU fwnode registration > drivers: platform: add fwnode base platform devices retrieval > drivers: iommu: make iommu_fwspec OF agnostic > drivers: acpi: implement acpi_dma_configure > drivers: acpi: iort: add node match function > drivers: acpi: iort: add support for ARM SMMU platform devices > creation > drivers: iommu: arm-smmu-v3: split probe functions into DT/generic > portions > drivers: iommu: arm-smmu-v3: enable ACPI driver initialization > drivers: iommu: arm-smmu-v3: add IORT platform device creation > drivers: acpi: iort: replace rid map type with type mask > drivers: acpi: iort: introduce iort_iommu_configure > > drivers/acpi/glue.c | 4 +- > drivers/acpi/iort.c | 360 +++++++++++++++++++++++++++++++++++++- > drivers/acpi/scan.c | 29 +++ > drivers/base/platform.c | 23 +++ > drivers/iommu/Kconfig | 4 + > drivers/iommu/Makefile | 1 + > drivers/iommu/arm-smmu-v3.c | 147 ++++++++++++++-- > drivers/iommu/iommu-fwspec.c | 114 ++++++++++++ > drivers/iommu/of_iommu.c | 52 ------ > drivers/pci/probe.c | 3 +- > include/acpi/acpi_bus.h | 2 + > include/asm-generic/vmlinux.lds.h | 1 + > include/linux/acpi.h | 5 + > include/linux/fwnode.h | 1 + > include/linux/iommu-fwspec.h | 60 +++++++ > include/linux/iommu.h | 25 +++ > include/linux/iort.h | 19 ++ > include/linux/of_iommu.h | 24 +-- > include/linux/platform_device.h | 3 + > 19 files changed, 782 insertions(+), 95 deletions(-) > create mode 100644 drivers/iommu/iommu-fwspec.c > create mode 100644 include/linux/iommu-fwspec.h > > -- > 2.6.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
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