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Commit 5774f7c5 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add statistics about allocated io memory 



Impact: see amount of allocated io memory in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 18811f55

arch/x86/kernel/amd_iommu.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -74,6 +74,7 @@ DECLARE_STATS_COUNTER(cnt_free_coherent); 
DECLARE_STATS_COUNTER(cross_page);

DECLARE_STATS_COUNTER(cross_page);

DECLARE_STATS_COUNTER(domain_flush_single);

DECLARE_STATS_COUNTER(domain_flush_single);

DECLARE_STATS_COUNTER(domain_flush_all);

DECLARE_STATS_COUNTER(domain_flush_all);

DECLARE_STATS_COUNTER(alloced_io_mem);





static struct dentry *stats_dir;

static struct dentry *stats_dir;

static struct dentry *de_isolate;

static struct dentry *de_isolate;
@@ -110,6 +111,7 @@ static void amd_iommu_stats_init(void) 
	amd_iommu_stats_add(&cross_page);

	amd_iommu_stats_add(&cross_page);

	amd_iommu_stats_add(&domain_flush_single);

	amd_iommu_stats_add(&domain_flush_single);

	amd_iommu_stats_add(&domain_flush_all);

	amd_iommu_stats_add(&domain_flush_all);

	amd_iommu_stats_add(&alloced_io_mem);

}

}





#endif

#endif
@@ -1246,6 +1248,8 @@ static dma_addr_t __map_single(struct device *dev, 
	}

	}

	address += offset;

	address += offset;





	ADD_STATS_COUNTER(alloced_io_mem, size);



	if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {

	if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {

		iommu_flush_tlb(iommu, dma_dom->domain.id);

		iommu_flush_tlb(iommu, dma_dom->domain.id);

		dma_dom->need_flush = false;

		dma_dom->need_flush = false;
@@ -1282,6 +1286,8 @@ static void __unmap_single(struct amd_iommu *iommu, 
		start += PAGE_SIZE;

		start += PAGE_SIZE;

	}

	}





	SUB_STATS_COUNTER(alloced_io_mem, size);



	dma_ops_free_addresses(dma_dom, dma_addr, pages);

	dma_ops_free_addresses(dma_dom, dma_addr, pages);





	if (amd_iommu_unmap_flush || dma_dom->need_flush) {

	if (amd_iommu_unmap_flush || dma_dom->need_flush) {