AMD IOMMU: add stats counter for unmap_single requests
Impact: see number of unmap_single requests in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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0f2a86f200
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146a6917fc
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@ -66,6 +66,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid);
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DECLARE_STATS_COUNTER(compl_wait);
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DECLARE_STATS_COUNTER(cnt_map_single);
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DECLARE_STATS_COUNTER(cnt_unmap_single);
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static struct dentry *stats_dir;
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static struct dentry *de_isolate;
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@ -94,6 +95,7 @@ static void amd_iommu_stats_init(void)
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amd_iommu_stats_add(&compl_wait);
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amd_iommu_stats_add(&cnt_map_single);
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amd_iommu_stats_add(&cnt_unmap_single);
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}
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#endif
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@ -1321,6 +1323,8 @@ static void unmap_single(struct device *dev, dma_addr_t dma_addr,
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struct protection_domain *domain;
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u16 devid;
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INC_STATS_COUNTER(cnt_unmap_single);
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if (!check_device(dev) ||
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!get_device_resources(dev, &iommu, &domain, &devid))
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/* device not handled by any AMD IOMMU */
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