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Core changes:
- Allow irq retriggering to follow a hierarchy
- Allow interrupt hierarchies to be trimmed at allocation time
- Allow interrupts to be hidden from /proc/interrupts (IPIs)
- Introduce stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER
- New per-cpu IPI handling flow
Architecture changes:
- Move arm/arm64 IPI handling to the core interrupt code, removing
the home brewed accounting
Driver updates:
- New driver for the MStar (and more recently Mediatek) platforms
- New driver for the Actions Owl SIRQ controller
- New driver for the TI PRUSS infrastructure
- Wake-up support for the Qualcomm PDC controller
- Primary interrupt controller support for the Designware APB ICTL
- Convert the IPI code for GIC, GICv3, hip04, armada-270-xp and bcm2836
to using standard interrupts
- Improve GICv3 pseudo-NMI support to deal with both non-secure and secure
priorities on arm64
- Convert the GIC/GICv3 drivers to using HW-based irq retrigger
- A sprinkling of dev_err_probe() conversion
- A set of NVIDIA Tegra fixes for interrupt hierarchy corruption
- A reset fix for the Loongson HTVEC driver
- A couple of error handling fixes in the TI SCI drivers
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Merge tag 'irqchip-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core
Pull irqchip updates from Marc Zyngier:
Core changes:
- Allow irq retriggering to follow a hierarchy
- Allow interrupt hierarchies to be trimmed at allocation time
- Allow interrupts to be hidden from /proc/interrupts (IPIs)
- Introduce stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER
- New per-cpu IPI handling flow
Architecture changes:
- Move arm/arm64 IPI handling to the core interrupt code, removing
the home brewed accounting
Driver updates:
- New driver for the MStar (and more recently Mediatek) platforms
- New driver for the Actions Owl SIRQ controller
- New driver for the TI PRUSS infrastructure
- Wake-up support for the Qualcomm PDC controller
- Primary interrupt controller support for the Designware APB ICTL
- Convert the IPI code for GIC, GICv3, hip04, armada-270-xp and bcm2836
to using standard interrupts
- Improve GICv3 pseudo-NMI support to deal with both non-secure and secure
priorities on arm64
- Convert the GIC/GICv3 drivers to using HW-based irq retrigger
- A sprinkling of dev_err_probe() conversion
- A set of NVIDIA Tegra fixes for interrupt hierarchy corruption
- A reset fix for the Loongson HTVEC driver
- A couple of error handling fixes in the TI SCI drivers
The Tegra PMC driver does ungodly things with the interrupt hierarchy,
repeatedly corrupting it by pulling hwirq numbers out of thin air,
overriding existing IRQ mappings and changing the handling flow
of unsuspecting users.
All of this is done in the name of preserving the interrupt hierarchy
even when these levels do not exist in the HW. Together with the use
of proper IRQs for IPIs, this leads to an unbootable system as the
rescheduling IPI gets repeatedly repurposed for random drivers...
Instead, let's simply mark the level from which the hierarchy does
not make sense for the HW, and let the core code trim the usused
levels from the hierarchy.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Make the tegra186 GPIO driver resistent to variable depth
interrupt hierarchy, which we are about to introduce.
No functionnal change yet.
Signed-off-by: Marc Zyngier <maz@kernel.org>
It appears that some HW is ugly enough that not all the interrupts
connected to a particular interrupt controller end up with the same
hierarchy depth (some of them are terminated early). This leaves
the irqchip hacker with only two choices, both equally bad:
- create discrete domain chains, one for each "hierarchy depth",
which is very hard to maintain
- create fake hierarchy levels for the shallow paths, leading
to all kind of problems (what are the safe hwirq values for these
fake levels?)
Implement the ability to cut short a single interrupt hierarchy
from a level marked as being disconnected by using the new
irq_domain_disconnect_hierarchy() helper.
The irqdomain allocation code will then perform the trimming
Signed-off-by: Marc Zyngier <maz@kernel.org>
Kexec can directly boot into a new kernel without going to complete
reboot. This can leave the previous kernel's configuration for PDC
interrupts as is.
Clear previous kernel's configuration during init by setting interrupts
in enable bank to zero. The IRQs specified in qcom,pdc-ranges property
are the only ones that can be used by the new kernel so clear only those
IRQs. The remaining ones may be in use by a different kernel and should
not be set by new kernel.
Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-7-git-send-email-mkshah@codeaurora.org
Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag to enable/unmask the
wakeirqs during suspend entry.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-6-git-send-email-mkshah@codeaurora.org
Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag to enable/unmask the
wakeirqs during suspend entry.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-5-git-send-email-mkshah@codeaurora.org
An interrupt that is disabled/masked but set for wakeup may still need to
be able to wake up the system from sleep states like "suspend to RAM".
To that effect, introduce the IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag.
If the irqchip have this flag set, the irq PM code will enable/unmask
the irqs that are marked for wakeup, but that are in a disabled state.
On resume, such irqs will be restored back to their disabled state.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
[maz: commit message fix-up]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/1601267524-20199-4-git-send-email-mkshah@codeaurora.org
msmgpio irqchip was not using return value of irq_set_irq_wake() callback
since previously GIC-v3 irqchip neither had IRQCHIP_SKIP_SET_WAKE flag nor
it implemented .irq_set_wake callback. This lead to irq_set_irq_wake()
return error -ENXIO.
However from 'commit 4110b5cbb014 ("irqchip/gic-v3: Allow interrupt to be
configured as wake-up sources")' GIC irqchip has IRQCHIP_SKIP_SET_WAKE
flag.
Use return value from irq_set_irq_wake() and irq_chip_set_wake_parent()
instead of always returning success.
Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-3-git-send-email-mkshah@codeaurora.org
Both IRQCHIP_SET_TYPE_MASKED and IRQCHIP_MASK_ON_SUSPEND flags are already
set for msmgpio's parent PDC irqchip but GPIO interrupts do not get masked
during suspend or during setting irq type since genirq checks irqchip flag
of msmgpio irqchip which forwards these calls to its parent PDC irqchip.
Add irqchip specific flags for msmgpio irqchip to mask non wakeirqs during
suspend and mask before setting irq type. Masking before changing type make
sures any spurious interrupt is not detected during this operation.
Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-2-git-send-email-mkshah@codeaurora.org
As SMP-on-UP is a valid configuration on 32bit ARM, do not assume that
IPIs are populated in show_ipi_list().
Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Reported-by: kernelci.org bot <bot@kernelci.org>
Tested-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This interrupt controller is found in the Actions Semi Owl SoCs (S500,
S700 and S900) and provides support for handling up to 3 external
interrupt lines.
Each line can be independently configured as interrupt and triggers on
either of the edges or either of the levels. Additionally, each line
can also be masked individually.
Co-developed-by: Parthiban Nallathambi <pn@denx.de>
Co-developed-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1a010ef0eb78831b5657d74a0fcdef7a8efb2ec4.1600114378.git.cristian.ciocaltea@gmail.com
Add the required updates to describe the use of dw-apb-ictl as a primary
interrupt controller.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200924071754.4509-5-thunder.leizhen@huawei.com
Add support to use dw-apb-ictl as primary interrupt controller.
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: minor fixups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-4-thunder.leizhen@huawei.com
Add the required abstractions that will help introducing hierarchical
domain support to the dw-apb-ictl driver.
No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message, some cleanups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-3-thunder.leizhen@huawei.com
In order to avoid compilation errors when a driver references set_handle_irq(),
but that the architecture doesn't select GENERIC_IRQ_MULTI_HANDLER,
add a stub function that will just WARN_ON_ONCE() if ever used.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200924071754.4509-2-thunder.leizhen@huawei.com
ipi_teardown() is only used when CONFIG_HOTPLUG_CPU is enabled.
Move the function to a location guarded by this config option.
Signed-off-by: Marc Zyngier <maz@kernel.org>
If CONFIG_HOTPLUG_CPU is n, gcc warns:
arch/arm64/kernel/smp.c:967:13: warning: ‘ipi_teardown’ defined but not used [-Wunused-function]
static void ipi_teardown(int cpu)
^~~~~~~~~~~~
Use #ifdef guard this.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200918123318.23764-1-yuehaibing@huawei.com
Introduce a static key identifying Samsung's unique creation, allowing
to replace the indirect call to compute the base addresses with
a simple test on the static key.
Faster, cheaper, negative diffstat.
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Although it doesn't seem possible to disable individual mailbox
interrupts, we still need to provide some callbacks.
Fixes: 09eb672ce4fb ("irqchip/bcm2836: Configure mailbox interrupts as standard interrupts")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Let's switch the arm code to the core accounting, which already
does everything we need.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
The old IPI registration interface is now unused on arm, so let's
get rid of it.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Let's switch the arm64 code to the core accounting, which already
does everything we need.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
The old IPI registration interface is now unused on arm64, so let's
get rid of it.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
To introduce IPIs as standard interrupts to the Armada 370-XP
driver, let's allocate a completely separate irqdomain and
irqchip combo that lives parallel to the "standard" one.
This effectively should be modelled as a chained interrupt
controller, but the code is in such a state that it is
pretty hard to shoehorn, as it would require the rewrite
of the MSI layer as well.
Signed-off-by: Marc Zyngier <maz@kernel.org>
In order to switch the hip04 driver to provide standard interrupts
for IPIs, rework the way interrupts are allocated, making sure
the irqdomain covers the SGIs as well as the rest of the interrupt
range.
The driver is otherwise so old-school that it creates all interrupts
upfront (duh!), so there is hardly anything else to change, apart
from communicating the IPIs to the arch code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
In order to switch the bcm2836 driver to privide standard interrupts
for IPIs, it first needs to stop lying about the way things work.
The mailbox interrupt is actually a multiplexer, with enough
bits to store 32 pending interrupts per CPU. So let's turn it
into a chained irqchip.
Once this is done, we can instanciate the corresponding IPIs,
and pass them to the architecture code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
The architecture code now enables the IPIs as required, so no
need to enable SGIs by default in the GIC code.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Change the way we deal with GIC SGIs by turning them into proper
IRQs, and calling into the arch code to register the interrupt range
instead of a callback.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
As we are about to change quite a lot of the SMP support code,
let's start by moving it around so that it minimizes the amount
of #ifdefery.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Change the way we deal with GICv3 SGIs by turning them into proper
IRQs, and calling into the arch code to register the interrupt range
instead of a callback.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
The K3 AM65x and J721E SoCs have the next generation of the PRU-ICSS IP,
commonly called ICSSG. The PRUSS INTC present within the ICSSG supports
more System Events (160 vs 64), more Interrupt Channels and Host Interrupts
(20 vs 10) compared to the previous generation PRUSS INTC instances. The
first 2 and the last 10 of these host interrupt lines are used by the
PRU and other auxiliary cores and sub-modules within the ICSSG, with 8
host interrupts connected to MPU. The host interrupts 5, 6, 7 are also
connected to the other ICSSG instances within the SoC and can be
partitioned as per system integration through the board dts files.
Enhance the PRUSS INTC driver to add support for this ICSSG INTC
instance.
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This implements the irq_get_irqchip_state and irq_set_irqchip_state
callbacks for the TI PRUSS INTC driver. The set callback can be used
by drivers to "kick" a PRU by injecting a PRU system event.
Co-developed-by: Suman Anna <s-anna@ti.com>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
The PRUSS INTC has a fixed number of output interrupt lines that are
connected to a number of processors or other PRUSS instances or other
devices (like DMA) on the SoC. The output interrupt lines 2 through 9
are usually connected to the main Arm host processor and are referred
to as host interrupts 0 through 7 from ARM/MPU perspective.
All of these 8 host interrupts are not always exclusively connected
to the Arm interrupt controller. Some SoCs have some interrupt lines
not connected to the Arm interrupt controller at all, while a few others
have the interrupt lines connected to multiple processors in which they
need to be partitioned as per SoC integration needs. For example, AM437x
and 66AK2G SoCs have 2 PRUSS instances each and have the host interrupt 5
connected to the other PRUSS, while AM335x has host interrupt 0 shared
between MPU and TSC_ADC and host interrupts 6 & 7 shared between MPU and
a DMA controller.
Add logic to the PRUSS INTC driver to ignore both these shared and
invalid interrupts.
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
The Programmable Real-Time Unit Subsystem (PRUSS) contains a local
interrupt controller (INTC) that can handle various system input events
and post interrupts back to the device-level initiators. The INTC can
support upto 64 input events with individual control configuration and
hardware prioritization. These events are mapped onto 10 output interrupt
lines through two levels of many-to-one mapping support. Different
interrupt lines are routed to the individual PRU cores or to the host
CPU, or to other devices on the SoC. Some of these events are sourced
from peripherals or other sub-modules within that PRUSS, while a few
others are sourced from SoC-level peripherals/devices.
The PRUSS INTC platform driver manages this PRUSS interrupt controller
and implements an irqchip driver to provide a Linux standard way for
the PRU client users to enable/disable/ack/re-trigger a PRUSS system
event. The system events to interrupt channels and output interrupts
relies on the mapping configuration provided either through the PRU
firmware blob (for interrupts routed to PRU cores) or via the PRU
application's device tree node (for interrupt routed to the main CPU).
In the first case the mappings will be programmed on PRU remoteproc
driver demand (via irq_create_fwspec_mapping) during the boot of a PRU
core and cleaned up after the PRU core is stopped.
Reference counting is used to allow multiple system events to share a
single channel and to allow multiple channels to share a single host
event.
The PRUSS INTC module is reference counted during the interrupt
setup phase through the irqchip's irq_request_resources() and
irq_release_resources() ops. This restricts the module from being
removed as long as there are active interrupt users.
The driver currently supports and can be built for OMAP architecture
based AM335x, AM437x and AM57xx SoCs; Keystone2 architecture based
66AK2G SoCs and Davinci architecture based OMAP-L13x/AM18x/DA850 SoCs.
All of these SoCs support 64 system events, 10 interrupt channels and
10 output interrupt lines per PRUSS INTC with a few SoC integration
differences.
NOTE:
Each PRU-ICSS's INTC on AM57xx SoCs is preceded by a Crossbar that
enables multiple external events to be routed to a specific number
of input interrupt events. Any non-default external interrupt event
directed towards PRUSS needs this crossbar to be setup properly.
Co-developed-by: Suman Anna <s-anna@ti.com>
Co-developed-by: Andrew F. Davis <afd@ti.com>
Co-developed-by: Roger Quadros <rogerq@ti.com>
Co-developed-by: David Lechner <david@lechnology.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
