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Commit 8ecaf8f1 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add statistics about total number of map requests



Impact: see total number of map requests in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 5774f7c5
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+4 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ DECLARE_STATS_COUNTER(cross_page);
DECLARE_STATS_COUNTER(domain_flush_single);
DECLARE_STATS_COUNTER(domain_flush_all);
DECLARE_STATS_COUNTER(alloced_io_mem);
DECLARE_STATS_COUNTER(total_map_requests);

static struct dentry *stats_dir;
static struct dentry *de_isolate;
@@ -112,6 +113,7 @@ static void amd_iommu_stats_init(void)
	amd_iommu_stats_add(&domain_flush_single);
	amd_iommu_stats_add(&domain_flush_all);
	amd_iommu_stats_add(&alloced_io_mem);
	amd_iommu_stats_add(&total_map_requests);
}

#endif
@@ -1229,6 +1231,8 @@ static dma_addr_t __map_single(struct device *dev,
	pages = iommu_num_pages(paddr, size, PAGE_SIZE);
	paddr &= PAGE_MASK;

	INC_STATS_COUNTER(total_map_requests);

	if (pages > 1)
		INC_STATS_COUNTER(cross_page);