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Subject[PATCH 23/28] iommu/amd: Add call-back routine for HPET MSI
Date
Add a routine to setup a HPET MSI interrupt for remapping.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
drivers/iommu/amd_iommu.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index ee10f30..fed1395 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -4128,4 +4128,30 @@ static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
return 0;
}

+static int setup_hpet_msi(unsigned int irq, unsigned int id)
+{
+ struct irq_2_irte *irte_info;
+ struct irq_cfg *cfg;
+ int index, devid;
+
+ cfg = irq_get_chip_data(irq);
+ if (!cfg)
+ return -EINVAL;
+
+ irte_info = &cfg->irq_remap_info.irq_2_irte;
+ devid = get_hpet_devid(id);
+ if (devid < 0)
+ return devid;
+
+ index = alloc_irq_index(cfg, devid, 1);
+ if (index < 0)
+ return index;
+
+ irte_info->devid = devid;
+ irte_info->index = index;
+ cfg->remapped = true;
+
+ return 0;
+}
+
#endif
--
1.7.9.5



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