forked from luck/tmp_suning_uos_patched
AMD IOMMU: add stats counter for map_sg requests
Impact: see number of map_sg requests in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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@ -67,6 +67,7 @@ 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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DECLARE_STATS_COUNTER(cnt_map_sg);
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static struct dentry *stats_dir;
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static struct dentry *de_isolate;
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@ -96,6 +97,7 @@ 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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amd_iommu_stats_add(&cnt_map_sg);
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}
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#endif
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@ -1377,6 +1379,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
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int mapped_elems = 0;
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u64 dma_mask;
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INC_STATS_COUNTER(cnt_map_sg);
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if (!check_device(dev))
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return 0;
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