diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2015-06-05 16:35:22 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-11 15:16:53 +1000 |
| commit | 0054719386d96984153ad31d714a8be4ec7eba80 (patch) | |
| tree | d31c8c0a58ccb6ff8061675775384fa4c42f6d6c /arch/powerpc/include | |
| parent | c035e37b58c75ca216bfd1d5de3c1080ac0022b9 (diff) | |
powerpc/iommu/ioda2: Add get_table_size() to calculate the size of future table
This adds a way for the IOMMU user to know how much a new table will
use so it can be accounted in the locked_vm limit before allocation
happens.
This stores the allocated table size in pnv_pci_ioda2_get_table_size()
so the locked_vm counter can be updated correctly when a table is
being disposed.
This defines an iommu_table_group_ops callback to let VFIO know
how much memory will be locked if a table is created.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/iommu.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index e5541759a37d..9d3749287689 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -99,6 +99,7 @@ struct iommu_table { unsigned long it_size; /* Size of iommu table in entries */ unsigned long it_indirect_levels; unsigned long it_level_size; + unsigned long it_allocated_size; unsigned long it_offset; /* Offset into global table */ unsigned long it_base; /* mapped address of tce table */ unsigned long it_index; /* which iommu table this is */ @@ -147,6 +148,10 @@ extern struct iommu_table *iommu_init_table(struct iommu_table * tbl, struct iommu_table_group; struct iommu_table_group_ops { + unsigned long (*get_table_size)( + __u32 page_shift, + __u64 window_size, + __u32 levels); long (*create_table)(struct iommu_table_group *table_group, int num, __u32 page_shift, |