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ACPI: platform: setup MSI domain for ACPI based platform device

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By allowing platform MSI domain to be created on ACPI platforms,
a platform device MSI domain can be set-up when it is probed.

In order to do that, the MSI domain the platform device connects
to should be retrieved, so the iort_get_platform_device_domain() is
introduced to retrieve the domain from the IORT kernel layer.

With the domain retrieved, we need a proper way to set the
domain to platform device.

Given that some platform devices (irqchips) require the MSI irqdomain
to be their interrupt parent domain, the MSI irqdomain should be
determined before platform device is probed but after the platform
device is allocated which means that the code setting up the MSI
irqdomain, ie acpi_configure_pmsi_domain() should be called in
acpi_platform_notify() (that is triggered after adding a device but
before the respective driver is probed) for the platform MSI domain
code set-up path to work properly.

Acked-by: Rafael J. Wysocki <rafael@kernel.org> [for glue.c]
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
[lorenzo.pieralisi@arm.com: rewrote commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Ming Lei <ming.lei@canonical.com>
Tested-by: Wei Xu <xuwei5@hisilicon.com>
Tested-by: Sinan Kaya <okaya@codeaurora.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Tomasz Nowicki <tn@semihalf.com>
This commit is contained in:
Hanjun Guo
2017-03-07 20:40:06 +08:00
committed by Lorenzo Pieralisi
parent ae7c183804
commit d4f54a1866
3 changed files with 58 additions and 0 deletions
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6
drivers/acpi/glue.c
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@@ -6,6 +6,8 @@
*
* This file is released under the GPLv2.
*/
#include <linux/acpi_iort.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
@@ -14,6 +16,7 @@
#include <linux/rwsem.h>
#include <linux/acpi.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "internal.h"
@@ -322,6 +325,9 @@ static int acpi_platform_notify(struct device *dev)
if (!adev)
goto out;
if (dev->bus == &platform_bus_type)
acpi_configure_pmsi_domain(dev);
if (type && type->setup)
type->setup(dev);
else if (adev->handler && adev->handler->bind)