From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 26 Jun 2012 14:00:08 +0000 (+0200)
Subject: iommu/amd: Add call-back routine for HPET MSI
X-Git-Tag: v3.7-rc1~93^2^6~7
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d976195c93bce4512e990d170858d20d71c95c45;p=linux-2.6-block.git

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

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index bcf48156868b..aeb890c35f7e 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -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