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Commit eb9c9527 authored by Alex Williamson's avatar Alex Williamson Committed by Joerg Roedel
Browse files

iommu/amd: Split IOMMU group initialization 



This needs to be broken apart, start with pulling all the IOMMU
group init code into a new function.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 6f0c0580

drivers/iommu/amd_iommu.c

+43 −18
Original line number Diff line number Diff line
@@ -276,39 +276,32 @@ static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) 


#define REQ_ACS_FLAGS	(PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF)



static int iommu_init_device(struct device *dev)

static int init_iommu_group(struct device *dev)

{

	struct pci_dev *dma_pdev = NULL, *pdev = to_pci_dev(dev);

	struct iommu_dev_data *dev_data;

	struct iommu_group *group;

	u16 alias;

	struct pci_dev *dma_pdev = NULL;

	int ret;



	if (dev->archdata.iommu)

	group = iommu_group_get(dev);

	if (group) {

		iommu_group_put(group);

		return 0;

	}



	dev_data = find_dev_data(get_device_id(dev));

	if (!dev_data)

		return -ENOMEM;



	alias = amd_iommu_alias_table[dev_data->devid];

	if (alias != dev_data->devid) {

		struct iommu_dev_data *alias_data;



		alias_data = find_dev_data(alias);

		if (alias_data == NULL) {

			pr_err("AMD-Vi: Warning: Unhandled device %s\n",

					dev_name(dev));

			free_dev_data(dev_data);

			return -ENOTSUPP;

		}

		dev_data->alias_data = alias_data;

	if (dev_data->alias_data) {

		u16 alias;



		alias = amd_iommu_alias_table[dev_data->devid];

		dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff);

	}



	if (dma_pdev == NULL)

		dma_pdev = pci_dev_get(pdev);

	if (!dma_pdev)

		dma_pdev = pci_dev_get(to_pci_dev(dev));



	/* Account for quirked devices */

	swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev));
@@ -358,6 +351,38 @@ root_bus: 


	iommu_group_put(group);



	return ret;

}



static int iommu_init_device(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct iommu_dev_data *dev_data;

	u16 alias;

	int ret;



	if (dev->archdata.iommu)

		return 0;



	dev_data = find_dev_data(get_device_id(dev));

	if (!dev_data)

		return -ENOMEM;



	alias = amd_iommu_alias_table[dev_data->devid];

	if (alias != dev_data->devid) {

		struct iommu_dev_data *alias_data;



		alias_data = find_dev_data(alias);

		if (alias_data == NULL) {

			pr_err("AMD-Vi: Warning: Unhandled device %s\n",

					dev_name(dev));

			free_dev_data(dev_data);

			return -ENOTSUPP;

		}

		dev_data->alias_data = alias_data;

	}



	ret = init_iommu_group(dev);

	if (ret)

		return ret;