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iommu/amd: Add routines to bind/unbind a pasid

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This patch adds routines to bind a specific process
address-space to a given PASID.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2011-11-24 10:41:57 +01:00
parent ed96f228ba
commit 2d5503b624
2 changed files with 332 additions and 0 deletions
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include/linux/amd-iommu.h
+26
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@@ -24,9 +24,13 @@
#ifdef CONFIG_AMD_IOMMU
struct task_struct;
struct pci_dev;
extern int amd_iommu_detect(void);
extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
struct task_struct *task);
extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);
/**
@@ -65,6 +69,28 @@ extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids);
*/
extern void amd_iommu_free_device(struct pci_dev *pdev);
/**
* amd_iommu_bind_pasid() - Bind a given task to a PASID on a device
* @pdev: The PCI device to bind the task to
* @pasid: The PASID on the device the task should be bound to
* @task: the task to bind
*
* The function returns 0 on success or a negative value on error.
*/
extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
struct task_struct *task);
/**
* amd_iommu_unbind_pasid() - Unbind a PASID from its task on
* a device
* @pdev: The device of the PASID
* @pasid: The PASID to unbind
*
* When this function returns the device is no longer using the PASID
* and the PASID is no longer bound to its task.
*/
extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);
#else
static inline int amd_iommu_detect(void) { return -ENODEV; }