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author | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-23 17:30:39 +0100 |
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committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-12 15:32:51 +0100 |
commit | ed96f228ba9725edf69385bffdc19ee5bb0ec641 (patch) | |
tree | 56fc5167fd66b4b7012ac0307d264223a30940e4 /include | |
parent | e3c495c74bc008a5c3671bf3411bc7f5382fa58f (diff) | |
download | linux-stable-ed96f228ba9725edf69385bffdc19ee5bb0ec641.tar.gz linux-stable-ed96f228ba9725edf69385bffdc19ee5bb0ec641.tar.bz2 linux-stable-ed96f228ba9725edf69385bffdc19ee5bb0ec641.zip |
iommu/amd: Implement device aquisition code for IOMMUv2
This patch adds the amd_iommu_init_device() and
amd_iommu_free_device() functions which make a device and
the IOMMU ready for IOMMUv2 usage.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/amd-iommu.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h index 4152c3073db4..e8c7a2ec86b3 100644 --- a/include/linux/amd-iommu.h +++ b/include/linux/amd-iommu.h @@ -20,10 +20,12 @@ #ifndef _ASM_X86_AMD_IOMMU_H #define _ASM_X86_AMD_IOMMU_H -#include <linux/irqreturn.h> +#include <linux/types.h> #ifdef CONFIG_AMD_IOMMU +struct pci_dev; + extern int amd_iommu_detect(void); @@ -33,6 +35,7 @@ extern int amd_iommu_detect(void); * @pdev: The PCI device the workaround is necessary for * @erratum: The erratum workaround to enable * + * The function needs to be called before amd_iommu_init_device(). * Possible values for the erratum number are for now: * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI * is enabled @@ -44,6 +47,24 @@ extern int amd_iommu_detect(void); extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); +/** + * amd_iommu_init_device() - Init device for use with IOMMUv2 driver + * @pdev: The PCI device to initialize + * @pasids: Number of PASIDs to support for this device + * + * This function does all setup for the device pdev so that it can be + * used with IOMMUv2. + * Returns 0 on success or negative value on error. + */ +extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); + +/** + * amd_iommu_free_device() - Free all IOMMUv2 related device resources + * and disable IOMMUv2 usage for this device + * @pdev: The PCI device to disable IOMMUv2 usage for' + */ +extern void amd_iommu_free_device(struct pci_dev *pdev); + #else static inline int amd_iommu_detect(void) { return -ENODEV; } |