linux-kernel - [PATCH 22/27] iommu/amd: Add call-back routine for HPET MSI

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Message-ID: <1342013952-10174-23-git-send-email-joerg.roedel@amd.com>
Date:	Wed, 11 Jul 2012 15:39:07 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 22/27] 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@....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 9a24a1b..ac6e731 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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