diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-12-02 19:34:11 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:56 +0100 |
| commit | 01106066a6900b518debe990ddaadf376d433bd6 (patch) | |
| tree | 29d3a651a6c0d50fe372df4585e20b6322ffd2e2 /arch/x86/kernel/amd_iommu.c | |
| parent | 684f2888847b896faafed87ce4733501d2cc283c (diff) | |
AMD IOMMU: add device attach function for IOMMU API
Impact: add a generic function to attach devices to protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index ef9b309e8e0..2f7c0b3a448 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1683,4 +1683,39 @@ static void amd_iommu_detach_device(struct iommu_domain *dom, iommu_completion_wait(iommu); } +static int amd_iommu_attach_device(struct iommu_domain *dom, + struct device *dev) +{ + struct protection_domain *domain = dom->priv; + struct protection_domain *old_domain; + struct amd_iommu *iommu; + struct pci_dev *pdev; + u16 devid; + + if (dev->bus != &pci_bus_type) + return -EINVAL; + + pdev = to_pci_dev(dev); + + devid = calc_devid(pdev->bus->number, pdev->devfn); + + if (devid >= amd_iommu_last_bdf || + devid != amd_iommu_alias_table[devid]) + return -EINVAL; + + iommu = amd_iommu_rlookup_table[devid]; + if (!iommu) + return -EINVAL; + + old_domain = domain_for_device(devid); + if (old_domain) + return -EBUSY; + + attach_device(iommu, domain, devid); + + iommu_completion_wait(iommu); + + return 0; +} + #endif |