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irqchip/gic-v3-its: Add IORT hook for platform MSI support

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Getting hold of the DevID requires us to call iort_pmsi_get_dev_id().
Since iort_pmsi_get_dev_id() may or may not be implemented, we
provide a weak function that acts as a stub.

The weak function will be removed when the ACPI counterpart is
merged.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier
2017-03-29 15:13:07 +01:00
parent f907c515ff
commit c2c8661fd7
1 changed files with 9 additions and 1 deletions
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8
drivers/irqchip/irq-gic-v3-its-platform-msi.c
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@@ -48,6 +48,11 @@ static int of_pmsi_get_dev_id(struct irq_domain *domain, struct device *dev,
return ret; return ret;
} }
int __weak iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id)
{
return -1;
}
static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev, static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *info) int nvec, msi_alloc_info_t *info)
{ {
@@ -57,7 +62,10 @@ static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
msi_info = msi_get_domain_info(domain->parent); msi_info = msi_get_domain_info(domain->parent);
if (dev->of_node)
ret = of_pmsi_get_dev_id(domain, dev, &dev_id); ret = of_pmsi_get_dev_id(domain, dev, &dev_id);
else
ret = iort_pmsi_get_dev_id(dev, &dev_id);
if (ret) if (ret)
return ret; return ret;