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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: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-11-23 12:36:25 +01:00
parent c99afa25b6
commit f3572db823
3 changed files with 23 additions and 0 deletions
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18
drivers/iommu/amd_iommu.c
View File

@ -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);

1
drivers/iommu/amd_iommu_proto.h
View File

@ -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

4
drivers/iommu/amd_iommu_types.h
View File

@ -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 */
};