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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-11-20 14:31:51 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-11-27 11:45:49 +0100 |
| commit | bb52777ec4d736c2d7c4f037b32d4eeeb172ed89 (patch) | |
| tree | dfeed02c76169a92fd04e12145c72f9a0cbaf6f7 /arch/x86/kernel/amd_iommu_init.c | |
| parent | bf3118c1276d27fe9e84aa42382da25ee0750777 (diff) | |
| download | linux-bb52777ec4d736c2d7c4f037b32d4eeeb172ed89.tar.bz2 | |
x86/amd-iommu: Add an index field to struct amd_iommu
This patch adds an index field to struct amd_iommu which can
be used to lookup it up in an array. This index will be used
in struct protection_domain to keep track which protection
domain has devices behind which IOMMU.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu_init.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index cee11424d412..8567d1698027 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -137,6 +137,10 @@ bool amd_iommu_unmap_flush; /* if true, flush on every unmap */ LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the system */ +/* Array to assign indices to IOMMUs*/ +struct amd_iommu *amd_iommus[MAX_IOMMUS]; +int amd_iommus_present; + /* * Pointer to the device table which is shared by all AMD IOMMUs * it is indexed by the PCI device id or the HT unit id and contains @@ -840,7 +844,18 @@ static void __init free_iommu_all(void) static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h) { spin_lock_init(&iommu->lock); + + /* Add IOMMU to internal data structures */ list_add_tail(&iommu->list, &amd_iommu_list); + iommu->index = amd_iommus_present++; + + if (unlikely(iommu->index >= MAX_IOMMUS)) { + WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n"); + return -ENOSYS; + } + + /* Index is fine - add IOMMU to the array */ + amd_iommus[iommu->index] = iommu; /* * Copy data from ACPI table entry to the iommu struct |