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iommu/amd: Add invalidate-context call-back

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This call-back is invoked when the task that is bound to a
pasid is about to exit. The driver can use it to shutdown
all context related to that context in a safe way.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2011-12-07 12:24:42 +01:00
parent 52efdb89d6
commit bc21662f72
2 changed files with 52 additions and 0 deletions
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17
include/linux/amd-iommu.h
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@@ -145,6 +145,23 @@ struct amd_iommu_device_info {
extern int amd_iommu_device_info(struct pci_dev *pdev,
struct amd_iommu_device_info *info);
/**
* amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating
* a pasid context. This call-back is
* invoked when the IOMMUv2 driver needs to
* invalidate a PASID context, for example
* because the task that is bound to that
* context is about to exit.
*
* @pdev: The PCI device the call-back should be registered for
* @cb: The call-back function
*/
typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid);
extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
amd_iommu_invalidate_ctx cb);
#else
static inline int amd_iommu_detect(void) { return -ENODEV; }