diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-23 15:36:25 +0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-12 18:19:05 +0400 |
| commit | f3572db823decfd747e6afd4c4ddfd67e8af8b6d (patch) | |
| tree | e806c8acc077ff9a3827f6dc4ab516fb76c65395 /drivers/iommu | |
| parent | c99afa25b67339b5fa7ef3767398878be9f60e1f (diff) | |
| download | linux-f3572db823decfd747e6afd4c4ddfd67e8af8b6d.tar.xz | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 18 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_proto.h | 1 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 4 |
3 files changed, 23 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 9a7e64b245a7..71773d0fb769 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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); diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h index bb5ecfecfa44..1a7f41c6cc66 100644 --- a/drivers/iommu/amd_iommu_proto.h +++ b/drivers/iommu/amd_iommu_proto.h @@ -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 diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 8e1a6460f683..c39988fbcbbb 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -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 */ }; |