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Commit a156ef99 authored by Jiang Liu's avatar Jiang Liu Committed by Joerg Roedel
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iommu/vt-d: Introduce helper function iova_size() to improve code readability 



Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 162d1b10

drivers/iommu/intel-iommu.c

+3 −4
Original line number Diff line number Diff line
@@ -3101,10 +3101,10 @@ static void flush_unmaps(void) 
			/* On real hardware multiple invalidations are expensive */

			if (cap_caching_mode(iommu->cap))

				iommu_flush_iotlb_psi(iommu, domain->id,

					iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1,

					iova->pfn_lo, iova_size(iova),

					!deferred_flush[i].freelist[j], 0);

			else {

				mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1));

				mask = ilog2(mm_to_dma_pfn(iova_size(iova)));

				iommu_flush_dev_iotlb(deferred_flush[i].domain[j],

						(uint64_t)iova->pfn_lo << PAGE_SHIFT, mask);

			}
@@ -3905,8 +3905,7 @@ static int intel_iommu_memory_notifier(struct notifier_block *nb, 
			rcu_read_lock();

			for_each_active_iommu(iommu, drhd)

				iommu_flush_iotlb_psi(iommu, si_domain->id,

					iova->pfn_lo,

					iova->pfn_hi - iova->pfn_lo + 1,

					iova->pfn_lo, iova_size(iova),

					!freelist, 0);

			rcu_read_unlock();

			dma_free_pagelist(freelist);

include/linux/iova.h

+5 −0
Original line number Diff line number Diff line
@@ -34,6 +34,11 @@ struct iova_domain { 
	unsigned long	dma_32bit_pfn;

};



static inline unsigned long iova_size(struct iova *iova)

{

	return iova->pfn_hi - iova->pfn_lo + 1;

}



struct iova *alloc_iova_mem(void);

void free_iova_mem(struct iova *iova);

void free_iova(struct iova_domain *iovad, unsigned long pfn);