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Commit d03f067a authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add stats counter for map_sg requests 



Impact: see number of map_sg requests in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 146a6917

arch/x86/kernel/amd_iommu.c

+4 −0
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid); 
DECLARE_STATS_COUNTER(compl_wait);

DECLARE_STATS_COUNTER(cnt_map_single);

DECLARE_STATS_COUNTER(cnt_unmap_single);

DECLARE_STATS_COUNTER(cnt_map_sg);



static struct dentry *stats_dir;

static struct dentry *de_isolate;
@@ -96,6 +97,7 @@ static void amd_iommu_stats_init(void) 
	amd_iommu_stats_add(&compl_wait);

	amd_iommu_stats_add(&cnt_map_single);

	amd_iommu_stats_add(&cnt_unmap_single);

	amd_iommu_stats_add(&cnt_map_sg);

}



#endif
@@ -1377,6 +1379,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, 
	int mapped_elems = 0;

	u64 dma_mask;



	INC_STATS_COUNTER(cnt_map_sg);



	if (!check_device(dev))

		return 0;