[PATCH v3 30/35] iommu/vt-d: Simplify intel_irq_remapping_select()

David Woodhouse
2020-10-24T21:36:16Z

From: David Woodhouse <dwmw@amazon.co.uk>

Now that the old get_irq_domain() method has gone, consolidate on just the
map_XXX_to_iommu() functions.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/iommu/intel/irq_remapping.c | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index bca44015bc1d..aeffda92b10b 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -203,13 +203,13 @@ static int modify_irte(struct irq_2_iommu *irq_iommu,
return rc;
}

-static struct irq_domain *map_hpet_to_ir(u8 hpet_id)
+static struct intel_iommu *map_hpet_to_iommu(u8 hpet_id)
{
int i;

for (i = 0; i < MAX_HPET_TBS; i++) {
if (ir_hpet[i].id == hpet_id && ir_hpet[i].iommu)
- return ir_hpet[i].iommu->ir_domain;
+ return ir_hpet[i].iommu;
}
return NULL;
}
@@ -225,13 +225,6 @@ static struct intel_iommu *map_ioapic_to_iommu(int apic)
return NULL;
}

-static struct irq_domain *map_ioapic_to_ir(int apic)
-{
- struct intel_iommu *iommu = map_ioapic_to_iommu(apic);
-
- return iommu ? iommu->ir_domain : NULL;
-}
-
static struct irq_domain *map_dev_to_ir(struct pci_dev *dev)
{
struct dmar_drhd_unit *drhd = dmar_find_matched_drhd_unit(dev);
@@ -1418,12 +1411,14 @@ static int intel_irq_remapping_select(struct irq_domain *d,
struct irq_fwspec *fwspec,
enum irq_domain_bus_token bus_token)
{
+ struct intel_iommu *iommu = NULL;
+
if (x86_fwspec_is_ioapic(fwspec))
- return d == map_ioapic_to_ir(fwspec->param[0]);
+ iommu = map_ioapic_to_iommu(fwspec->param[0]);
else if (x86_fwspec_is_hpet(fwspec))
- return d == map_hpet_to_ir(fwspec->param[0]);
+ iommu = map_hpet_to_iommu(fwspec->param[0]);

- return 0;
+ return iommu && d == iommu->ir_domain;
}

static const struct irq_domain_ops intel_ir_domain_ops = {