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Subject[PATCH v3 00/14] ACPI platform MSI, interrupt producer/consumer and its example mbi-gen
From: Hanjun Guo <>

This patch series is v3 of a previous posting,

v2 -> v3:
- Drop RFC tag
- Rebase against v4.9-rc2 and Lorenzo's v6 of ACPI IORT ARM SMMU support [1]
- Add 3 cleanup patches (patch 1, 2, 3)
- Drop arch_init call patch from last version
- Introduce a callback for platform device to set msi domain
- Introduce a new API to get paltform device's domain instead of
reusing the PCI one in previous version
- Add a patch to rework iort_node_get_id()


v2 -> v1:
- Fix the bug of if multi Interrupt() resoures in single _PRS,
we need to calculate all the irq numbers (I missed it in previous
- Rebased on Marc's irq/irqchip-4.9 branch and Lorenzo's v5
SMMU patches (also Robin's SMMu patches)
- Add patch irqchip: mbigen: promote mbigen init.

With platform msi support landed in the kernel, and the introduction
of IORT for GICv3 ITS (PCI MSI) [1], the framework for platform msi
is ready, this patch set add few patches to enable the ACPI platform
msi support.

For platform device connecting to ITS on arm platform, we have IORT
table with the named componant node to describe the mappings of paltform
device and ITS, so we can retrieve the dev id and find its parent
irqdomain (ITS) from IORT table (simlar with the ACPI ITS support).

With acpi platform msi supported, we add the ACPI support for irqchip
mbi-gen, which use this framework to form its stacked irqdomain, below
is the mbi-gen's topology in the system:

| ---------------| |------------------|
| | MSI | | wired interrupt(s)
| ITS |<-----------------| MBI-GEN |<----------------------------- IO device(s)
| | | |<----------------------------- IO device(s)
------------------ -------------------

So with ACPI platform MSI support, we can build the stacked domain for
mbi-gen which represented its mappings with the named componant in IORT,
but we still missing the connectings of devices to mbi-gen as in ACPI
world devices connect to main interrupt controller in MADT in default.

In ACPI 6.1, section 19.6.62, Interrupt Resource Descriptor Macro,

Interrupt (ResourceUsage, EdgeLevel, ActiveLevel, Shared,
ResourceSourceIndex, ResourceSource, DescriptorName)
{ InterruptList } => Buffer

For the arguement ResourceUsage and DescriptorName, which means:

ResourceUsage describes whether the device consumes the specified
interrupt ( ResourceConsumer ) or produces it for use by a child
device ( ResourceProducer ).
If nothing is specified, then ResourceConsumer is assumed.

DescriptorName evaluates to a name string which refers to the
entire resource descriptor.

So it can be used for devices connecting to a specific interrupt
prodcucer instead of the main interrupt controller in MADT, we can

Interrupt(ResourceConsumer,..., "\_SB.IRQP") {12,14,....},

then get the interrupt producer with the full path name "\_SB.IRQP".


Hanjun Guo (12):
ACPI: ARM64: IORT: minor cleanup for iort_match_node_callback()
irqchip: gic-v3-its: keep the head file include in alphabetic order
ACPI: ARM64: IORT: add missing comment for iort_dev_find_its_id()
irqchip: gicv3-its: platform-msi: refactor its_pmsi_prepare()
ACPI: platform-msi: retrieve dev id from IORT
irqchip: gicv3-its: platform-msi: refactor its_pmsi_init() to prepare
for ACPI
irqchip: gicv3-its: platform-msi: scan MADT to create platform msi
ACPI: ARM64: IORT: rework iort_node_get_id()
ACPI: platform: setup MSI domain for ACPI based platform device
msi: platform: make platform_msi_create_device_domain() ACPI aware
ACPI: irq: introduce interrupt producer
irqchip: mbigen: Add ACPI support

Kefeng Wang (2):
irqchip: mbigen: drop module owner
irqchip: mbigen: introduce mbigen_of_create_domain()

drivers/acpi/acpi_platform.c | 11 +++
drivers/acpi/arm64/iort.c | 83 ++++++++++++++++++--
drivers/acpi/gsi.c | 10 ++-
drivers/acpi/resource.c | 85 ++++++++++++++------
drivers/base/platform-msi.c | 3 +-
drivers/base/platform.c | 3 +
drivers/irqchip/irq-gic-v3-its-platform-msi.c | 106 +++++++++++++++++++------
drivers/irqchip/irq-gic-v3-its.c | 3 +-
drivers/irqchip/irq-mbigen.c | 109 ++++++++++++++++++++++----
include/acpi/acpi_bus.h | 1 +
include/linux/acpi_iort.h | 11 +++
include/linux/platform_device.h | 3 +
12 files changed, 346 insertions(+), 82 deletions(-)


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