Commit 77e0992a authored by Yong Wu's avatar Yong Wu Committed by Will Deacon
Browse files

iommu/io-pgtable: Allow io_pgtable_tlb ops optional 



This patch allows io_pgtable_tlb ops could be null since the IOMMU drivers
may use the tlb ops from iommu framework.

Signed-off-by: default avatarYong Wu <yong.wu@mediatek.com>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Acked-by: default avatarWill Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210107122909.16317-6-yong.wu@mediatek.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 862c3715

include/linux/io-pgtable.h

+5 −3
Original line number Diff line number Diff line
@@ -214,6 +214,7 @@ struct io_pgtable_domain_attr { 


static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)

{

	if (iop->cfg.tlb && iop->cfg.tlb->tlb_flush_all)

		iop->cfg.tlb->tlb_flush_all(iop->cookie);

}
@@ -221,6 +222,7 @@ static inline void 
io_pgtable_tlb_flush_walk(struct io_pgtable *iop, unsigned long iova,

			  size_t size, size_t granule)

{

	if (iop->cfg.tlb && iop->cfg.tlb->tlb_flush_walk)

		iop->cfg.tlb->tlb_flush_walk(iova, size, granule, iop->cookie);

}
@@ -229,7 +231,7 @@ io_pgtable_tlb_add_page(struct io_pgtable *iop, 
			struct iommu_iotlb_gather * gather, unsigned long iova,

			size_t granule)

{

	if (iop->cfg.tlb->tlb_add_page)

	if (iop->cfg.tlb && iop->cfg.tlb->tlb_add_page)

		iop->cfg.tlb->tlb_add_page(gather, iova, granule, iop->cookie);

}