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iommu/amd: Add call-back routine for HPET MSI

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Add a routine to setup a HPET MSI interrupt for remapping.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2012-06-26 16:00:08 +02:00
parent 0b4d48cb22
commit d976195c93
1 changed files with 26 additions and 0 deletions
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26
drivers/iommu/amd_iommu.c
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@ -4200,4 +4200,30 @@ 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_iommu *irte_info;
struct irq_cfg *cfg;
int index, devid;
cfg = irq_get_chip_data(irq);
if (!cfg)
return -EINVAL;
irte_info = &cfg->irq_2_iommu;
devid = get_hpet_devid(id);
if (devid < 0)
return devid;
index = alloc_irq_index(cfg, devid, 1);
if (index < 0)
return index;
irte_info->sub_handle = devid;
irte_info->irte_index = index;
irte_info->iommu = (void *)cfg;
return 0;
}
#endif