From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Fri, 5 Jun 2015 06:35:22 +0000 (+1000)
Subject: powerpc/iommu/ioda2: Add get_table_size() to calculate the size of future table
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~139^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0054719386d96984153ad31d714a8be4ec7eba80;p=pandora-kernel.git

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>
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