iommu: Allow io-pgtable to be used outside of drivers/iommu/

Move io-pgtable.h to include/linux/ and export alloc_io_pgtable_ops
and free_io_pgtable_ops. This enables drivers outside drivers/iommu/ to
use the page table library. Specifically, some ARM Mali GPUs use the
ARM page table formats.

Cc: Will Deacon <will.deacon@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/iommu/io-pgtable.c b/drivers/iommu/io-pgtable.c
index 127558d83667..93f2880be6c6 100644
--- a/drivers/iommu/io-pgtable.c
+++ b/drivers/iommu/io-pgtable.c
@@ -19,11 +19,10 @@
  */
 
 #include <linux/bug.h>
+#include <linux/io-pgtable.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 
-#include "io-pgtable.h"
-
 static const struct io_pgtable_init_fns *
 io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = {
 #ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE
@@ -61,6 +60,7 @@ struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
 
 	return &iop->ops;
 }
+EXPORT_SYMBOL_GPL(alloc_io_pgtable_ops);
 
 /*
  * It is the IOMMU driver's responsibility to ensure that the page table
@@ -77,3 +77,4 @@ void free_io_pgtable_ops(struct io_pgtable_ops *ops)
 	io_pgtable_tlb_flush_all(iop);
 	io_pgtable_init_table[iop->fmt]->free(iop);
 }
+EXPORT_SYMBOL_GPL(free_io_pgtable_ops);