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Message-Id: <1460654743-7896-1-git-send-email-lorenzo.pieralisi@arm.com>
Date: Thu, 14 Apr 2016 18:25:32 +0100
From: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To: iommu@...ts.linux-foundation.org
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
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
Subject: [RFC PATCH 00/11] ACPI IORT ARM SMMU support
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 this posting:
https://marc.info/?l=linux-acpi&m=145976009630179&w=2
this patchset enables ARM SMMU 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 ARM SMMUv3 and future IOMMU components easier to integrate.
PATCH [1] fixes a warning caused by a missing forward structure
declaration.
PATCH [2] provides IORT support for registering IOMMU components.
PATCH [3] 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 [4] makes use of the ACPI early probing API to add a linker script
section for probing devices via IORT ACPI kernel code.
PATCH [5] refactors the ARM SMMU 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 [6] makes the of_xlate() interface for IOMMUs DT agnostic by
changing its API and making it work on ACPI systems too
through the introduction of a generic IOMMU FW translation
specifier.
PATCH [7] implements ARM SMMU streamid mapping based on the previously
introduced infrastructure.
PATCH [8] enhances IORT kernel code to implement the full set of mappings
allowed through the ACPI IORT table.
PATCH [9] 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 [10] implements and enables code for probing the ARM SMMU with ACPI,
building on top of the previously introduced generic infrastructure.
PATCH [11] is a mechanical conversion of IRQ domain infrastructure to
generalize its translation capabilities for other kernel
subsystems, and it is there to prove that the approach taken
to implement IOMMU translation in a DT agnostic way would lead
to structure data duplication that may be deemed unnecessary
and can therefore be avoided.
This patchset is built on top and depends on these two patch series:
R.Murphy "Generic DT bindings for PCI and ARM SMMU"
https://marc.info/?l=linux-arm-kernel&m=145675372917701&w=2
T.Nowicki "Introduce ACPI world to ITS irqchip"
https://marc.info/?l=linux-acpi&m=145976009630179&w=2
Tested on Juno-r2 board with both DT and ACPI probing paths.
Lorenzo Pieralisi (11):
drivers: acpi: iort: fix struct pci_dev compiler warnings
drivers: acpi: iort: add support for IOMMU registration
drivers: iommu: add FWNODE_IOMMU fwnode type
drivers: acpi: iort: introduce linker section for IORT entries probing
drivers: iommu: arm-smmu: split probe functions into DT/generic
portions
drivers: iommu: make of_xlate() interface DT agnostic
drivers: iommu: arm-smmu: allow ACPI based streamid translation
drivers: acpi: iort: enhance mapping API
drivers: acpi: implement acpi_dma_configure
drivers: iommu: arm-smmu: implement ACPI probing
drivers: irqchip: make struct irq_fwspec generic
Documentation/IRQ-domain.txt | 2 +-
arch/arm/mach-exynos/suspend.c | 6 +-
arch/arm/mach-imx/gpc.c | 6 +-
arch/arm/mach-omap2/omap-wakeupgen.c | 6 +-
drivers/acpi/glue.c | 4 +-
drivers/acpi/gsi.c | 2 +-
drivers/acpi/iort.c | 188 ++++++++++++++++++-
drivers/acpi/scan.c | 29 +++
drivers/gpio/gpio-xgene-sb.c | 8 +-
drivers/iommu/arm-smmu.c | 346 ++++++++++++++++++++++++++++++-----
drivers/iommu/exynos-iommu.c | 11 +-
drivers/iommu/mtk_iommu.c | 13 +-
drivers/iommu/of_iommu.c | 8 +-
drivers/irqchip/irq-alpine-msi.c | 2 +-
drivers/irqchip/irq-crossbar.c | 6 +-
drivers/irqchip/irq-gic-v2m.c | 2 +-
drivers/irqchip/irq-gic-v3-its.c | 2 +-
drivers/irqchip/irq-gic-v3.c | 4 +-
drivers/irqchip/irq-gic.c | 4 +-
drivers/irqchip/irq-imx-gpcv2.c | 6 +-
drivers/irqchip/irq-mbigen.c | 4 +-
drivers/irqchip/irq-mips-gic.c | 2 +-
drivers/irqchip/irq-mtk-sysirq.c | 6 +-
drivers/irqchip/irq-mvebu-odmi.c | 2 +-
drivers/irqchip/irq-nvic.c | 4 +-
drivers/irqchip/irq-tegra.c | 6 +-
drivers/irqchip/irq-vf610-mscm-ir.c | 6 +-
drivers/of/base.c | 24 +++
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 | 21 +++
include/linux/iommu.h | 31 +++-
include/linux/iort.h | 18 ++
include/linux/irqdomain.h | 22 +--
include/linux/of.h | 7 +
kernel/irq/irqdomain.c | 17 +-
38 files changed, 692 insertions(+), 144 deletions(-)
--
2.6.4
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