- Switch the MSI decriptor locking to lock guards
- Replace a broken and naive implementation of PCI/MSI-X control word
updates in the PCI/TPH driver with a properly serialized variant in the
PCI/MSI core code.
- Remove the MSI descriptor abuse in the SCCI/UFS/QCOM driver by
replacing the direct access to the MSI descriptors with the proper API
function calls. People will never understand that APIs exist for a
reason...
- Provide core infrastructre for the upcoming PCI endpoint library
extensions. Currently limited to ARM GICv3+, but in theory extensible
to other architectures.
- Provide a MSI domain::teardown() callback, which allows drivers to undo
the effects of the prepare() callback.
- Move the MSI domain::prepare() callback invocation to domain creation
time to avoid redundant (and in case of ARM/GIC-V3-ITS confusing)
invocations on every allocation.
In combination with the new teardown callback this removes some ugly
hacks in the GIC-V3-ITS driver, which pretended to work around the
short comings of the core code so far. With this update the code is
correct by design and implementation.
- Make the irqchip MSI library globally available, provide a MSI parent
domain creation helper and convert a bunch of (PCI/)MSI drivers over to
the modern MSI parent mechanism. This is the first step to get rid of
at least one incarnation of the three PCI/MSI management schemes.
- The usual small cleanups and improvements
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Merge tag 'irq-msi-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MSI updates from Thomas Gleixner:
"Updates for the MSI subsystem (core code and PCI):
- Switch the MSI descriptor locking to lock guards
- Replace a broken and naive implementation of PCI/MSI-X control word
updates in the PCI/TPH driver with a properly serialized variant in
the PCI/MSI core code.
- Remove the MSI descriptor abuse in the SCCI/UFS/QCOM driver by
replacing the direct access to the MSI descriptors with the proper
API function calls. People will never understand that APIs exist
for a reason...
- Provide core infrastructre for the upcoming PCI endpoint library
extensions. Currently limited to ARM GICv3+, but in theory
extensible to other architectures.
- Provide a MSI domain::teardown() callback, which allows drivers to
undo the effects of the prepare() callback.
- Move the MSI domain::prepare() callback invocation to domain
creation time to avoid redundant (and in case of ARM/GIC-V3-ITS
confusing) invocations on every allocation.
In combination with the new teardown callback this removes some
ugly hacks in the GIC-V3-ITS driver, which pretended to work around
the short comings of the core code so far. With this update the
code is correct by design and implementation.
- Make the irqchip MSI library globally available, provide a MSI
parent domain creation helper and convert a bunch of (PCI/)MSI
drivers over to the modern MSI parent mechanism. This is the first
step to get rid of at least one incarnation of the three PCI/MSI
management schemes.
- The usual small cleanups and improvements"
* tag 'irq-msi-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
PCI/MSI: Use bool for MSI enable state tracking
PCI: tegra: Convert to MSI parent infrastructure
PCI: xgene: Convert to MSI parent infrastructure
PCI: apple: Convert to MSI parent infrastructure
irqchip/msi-lib: Honour the MSI_FLAG_NO_AFFINITY flag
irqchip/mvebu: Convert to msi_create_parent_irq_domain() helper
irqchip/gic: Convert to msi_create_parent_irq_domain() helper
genirq/msi: Add helper for creating MSI-parent irq domains
irqchip: Make irq-msi-lib.h globally available
irqchip/gic-v3-its: Use allocation size from the prepare call
genirq/msi: Engage the .msi_teardown() callback on domain removal
genirq/msi: Move prepare() call to per-device allocation
irqchip/gic-v3-its: Implement .msi_teardown() callback
genirq/msi: Add .msi_teardown() callback as the reverse of .msi_prepare()
irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask
dt-bindings: PCI: pci-ep: Add support for iommu-map and msi-map
irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS
irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable()
platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all()
genirq/msi: Rename msi_[un]lock_descs()
...
- Consolidate on one set of functions for the interrupt domain code to
get rid of pointlessly duplicated code with only marginal different
semantics.
- Update the documentation accordingly and consolidate the coding style
of the irqdomain header.
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Merge tag 'irq-cleanups-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq cleanups from Thomas Gleixner:
"A set of cleanups for the generic interrupt subsystem:
- Consolidate on one set of functions for the interrupt domain code
to get rid of pointlessly duplicated code with only marginal
different semantics.
- Update the documentation accordingly and consolidate the coding
style of the irqdomain header"
* tag 'irq-cleanups-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
irqdomain: Consolidate coding style
irqdomain: Fix kernel-doc and add it to Documentation
Documentation: irqdomain: Update it
Documentation: irq-domain.rst: Simple improvements
Documentation: irq/concepts: Minor improvements
Documentation: irq/concepts: Add commas and reflow
irqdomain: Improve kernel-docs of functions
irqdomain: Make struct irq_domain_info variables const
irqdomain: Use irq_domain_instantiate()'s return value as initializers
irqdomain: Drop irq_linear_revmap()
pinctrl: keembay: Switch to irq_find_mapping()
irqchip/armada-370-xp: Switch to irq_find_mapping()
gpu: ipu-v3: Switch to irq_find_mapping()
gpio: idt3243x: Switch to irq_find_mapping()
sh: Switch to irq_find_mapping()
powerpc: Switch to irq_find_mapping()
irqdomain: Drop irq_domain_add_*() functions
powerpc: Switch irq_domain_add_nomap() to use fwnode
thermal: Switch to irq_domain_create_linear()
soc: Switch to irq_domain_create_*()
...
Move irq-msi-lib.h into include/linux/irqchip, making it available
to compilation units outside of drivers/irqchip.
This requires some churn in drivers to fetch it from the new location,
generated using this script:
git grep -l -w \"irq-msi-lib.h\" | \
xargs sed -i -e 's:"irq-msi-lib.h":\<linux/irqchip/irq-msi-lib.h\>:'
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250513172819.2216709-2-maz@kernel.org
irq_domain_add_*() interfaces are going away as being obsolete now.
Switch to the preferred irq_domain_create_*() ones. Those differ in the
node parameter: They take more generic struct fwnode_handle instead of
struct device_node. Therefore, of_fwnode_handle() is added around the
original parameter.
Note some of the users can likely use dev->fwnode directly instead of
indirect of_fwnode_handle(dev->of_node). But dev->fwnode is not
guaranteed to be set for all, so this has to be investigated on case to
case basis (by people who can actually test with the HW).
[ tglx: Fix up subject prefix ]
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Link: https://lore.kernel.org/all/20250319092951.37667-22-jirislaby@kernel.org
Add an interrupt controller driver for MSI-X Interrupt Peripheral (MIP)
hardware block found in BCM2712. The interrupt controller is used to
handle MSI-X interrupts from peripherials behind PCIe endpoints like
RPi1 south bridge found in RPi5.
There are two MIPs on BCM2712, the first has 64 consecutive SPIs
assigned to 64 output vectors, and the second has 17 SPIs, but only
8 of them are consecutive starting at the 8th output vector.
Signed-off-by: Stanimir Varbanov <svarbanov@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Ivan T. Ivanov <iivanov@suse.de>
Link: https://lore.kernel.org/r/20250224083559.47645-4-svarbanov@suse.de
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
