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powerpc/powernv: Use it_page_shift in TCE build

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This makes use of iommu_table::it_page_shift instead of TCE_SHIFT and
TCE_RPN_SHIFT hardcoded values.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Alexey Kardashevskiy 2014-06-06 18:44:02 +10:00 committed by Benjamin Herrenschmidt
parent b0376c9b08
commit bc32057ed5
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/platforms/powernv/pci.c
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@ -564,10 +564,11 @@ static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
proto_tce |= TCE_PCI_WRITE;
tces = tcep = ((__be64 *)tbl->it_base) + index - tbl->it_offset;
rpn = __pa(uaddr) >> TCE_SHIFT;
rpn = __pa(uaddr) >> tbl->it_page_shift;
while (npages--)
*(tcep++) = cpu_to_be64(proto_tce | (rpn++ << TCE_RPN_SHIFT));
*(tcep++) = cpu_to_be64(proto_tce |
(rpn++ << tbl->it_page_shift));
/* Some implementations won't cache invalid TCEs and thus may not
* need that flush. We'll probably turn it_type into a bit mask