Marc Zyngier
aca268df8a
irqchip: gicv3-its: Move some alloc/free code to activate/deactivate
...
The ITS code could do a bit less in the alloc/free paths, and a bit
more in the activate/deactivate methods, giving a better separation
between software allocation and HW programing.
Suggested-by: Wuyun Wu (Abel) <wuyun.wu@huawei.com >
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Cc: linux-arm-kernel@lists.infradead.org
Cc: Yun Wu (Abel) <wuyun.wu@huawei.com >
Cc: Robert Richter <robert.richter@caviumnetworks.com >
Cc: Jason Cooper <jason@lakedaemon.net >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2014-12-13 13:41:06 +01:00
Marc Zyngier
2da399495f
irqchip: gicv3-its: Fix domain free in multi-MSI case
...
Fix stupid thinko on the path freeing the interrupts, where only
the first interrupt would get reset, and none of the others.
This should only affect multi-MSI allocations.
Reported-by: Wuyun Wu (Abel) <wuyun.wu@huawei.com >
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Cc: linux-arm-kernel@lists.infradead.org
Cc: Robert Richter <robert.richter@caviumnetworks.com >
Cc: Jason Cooper <jason@lakedaemon.net >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2014-12-13 13:41:06 +01:00
Marc Zyngier
4c21f3c26e
irqchip: GICv3: ITS: DT probing and initialization
...
Add the code that probes the ITS from the device tree,
and initialize it.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-11-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:14 +00:00
Marc Zyngier
b48ac83d6b
irqchip: GICv3: ITS: MSI support
...
Now, the bit of code that allow us to use the ITS as a MSI controller.
Both MSI and MSI-X are supported.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-10-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:14 +00:00
Marc Zyngier
84a6a2e7fc
irqchip: GICv3: ITS: device allocation and configuration
...
The ITS has a notion of "device" that can write to it in order to
generate an interrupt.
Conversly, the driver maintains a per-ITS list of devices, together
with their configuration information, and uses this to configure
the HW.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-9-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:14 +00:00
Marc Zyngier
1ac19ca6bf
irqchip: GICv3: ITS: tables allocators
...
The interrupt translation is driven by a set of tables (device,
ITT, and collection) to be in the end delivered to a CPU. Also,
the redistributors rely on a couple of tables (configuration, and
pending) to deliver the interrupts to the CPUs.
This patch adds the required allocators for these tables.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-8-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:13 +00:00
Marc Zyngier
bf9529f8c8
irqchip: GICv3: ITS: LPI allocator
...
LPIs are the type of interrupts that are used by the ITS. Given
the size of the namespace (anywhere between 16 and 32bit), interrupt
IDs are allocated in chunks of 32.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-7-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:13 +00:00
Marc Zyngier
c48ed51c0d
irqchip: GICv3: ITS: irqchip implementation
...
The usual methods that are used to present an irqchip to the rest
of the kernel
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-6-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:13 +00:00
Marc Zyngier
cc2d3216f5
irqchip: GICv3: ITS command queue
...
The ITS is configured through a number commands that the driver
issues to the HW using a memory-based circular buffer.
This patch implements the subset of commands that are required
for Linux.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com >
Link: https://lkml.kernel.org/r/1416839720-18400-5-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net >
2014-11-26 15:55:12 +00:00
