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Commit f3572db8 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/amd: Add function to get IOMMUv2 domain for pdev 



The AMD IOMMUv2 driver needs to get the IOMMUv2 domain
associated with a particular device. This patch adds a
function to get this information.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent c99afa25

drivers/iommu/amd_iommu.c

+18 −0
Original line number Diff line number Diff line
@@ -2958,6 +2958,8 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) 
	if (!domain->pt_root)

		goto out_free;



	domain->iommu_domain = dom;



	dom->priv = domain;



	return 0;
@@ -3463,3 +3465,19 @@ int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid, 
	return iommu_queue_command(iommu, &cmd);

}

EXPORT_SYMBOL(amd_iommu_complete_ppr);



struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev)

{

	struct protection_domain *domain;



	domain = get_domain(&pdev->dev);

	if (IS_ERR(domain))

		return NULL;



	/* Only return IOMMUv2 domains */

	if (!(domain->flags & PD_IOMMUV2_MASK))

		return NULL;



	return domain->iommu_domain;

}

EXPORT_SYMBOL(amd_iommu_get_v2_domain);

drivers/iommu/amd_iommu_proto.h

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid); 
extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,

				     unsigned long cr3);

extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);

extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);



#define PPR_SUCCESS			0x0

#define PPR_INVALID			0x1

drivers/iommu/amd_iommu_types.h

+4 −0
Original line number Diff line number Diff line
@@ -360,6 +360,8 @@ struct amd_iommu_fault { 
#define PPR_FAULT_RSVD  (1 << 7)

#define PPR_FAULT_GN    (1 << 8)



struct iommu_domain;



/*

 * This structure contains generic data for  IOMMU protection domains

 * independent of their use.
@@ -379,6 +381,8 @@ struct protection_domain { 
	unsigned dev_cnt;	/* devices assigned to this domain */

	unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */

	void *priv;		/* private data */

	struct iommu_domain *iommu_domain; /* Pointer to generic

					      domain structure */



};