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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-12 09:09:48 -0500
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 08:11:59 -0500
commitd03f067a9d0a1cc09529427af9a15e15d32ba1de (patch)
tree6d09e8029cd35ed8bf769cb8af662fbac81a1a30 /arch/x86/kernel
parent146a6917fc30616401a090f55cff2b855ee5b2ab (diff)
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>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/amd_iommu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 71646c81421a..859ca741745b 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -67,6 +67,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid);
67DECLARE_STATS_COUNTER(compl_wait); 67DECLARE_STATS_COUNTER(compl_wait);
68DECLARE_STATS_COUNTER(cnt_map_single); 68DECLARE_STATS_COUNTER(cnt_map_single);
69DECLARE_STATS_COUNTER(cnt_unmap_single); 69DECLARE_STATS_COUNTER(cnt_unmap_single);
70DECLARE_STATS_COUNTER(cnt_map_sg);
70 71
71static struct dentry *stats_dir; 72static struct dentry *stats_dir;
72static struct dentry *de_isolate; 73static struct dentry *de_isolate;
@@ -96,6 +97,7 @@ static void amd_iommu_stats_init(void)
96 amd_iommu_stats_add(&compl_wait); 97 amd_iommu_stats_add(&compl_wait);
97 amd_iommu_stats_add(&cnt_map_single); 98 amd_iommu_stats_add(&cnt_map_single);
98 amd_iommu_stats_add(&cnt_unmap_single); 99 amd_iommu_stats_add(&cnt_unmap_single);
100 amd_iommu_stats_add(&cnt_map_sg);
99} 101}
100 102
101#endif 103#endif
@@ -1377,6 +1379,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
1377 int mapped_elems = 0; 1379 int mapped_elems = 0;
1378 u64 dma_mask; 1380 u64 dma_mask;
1379 1381
1382 INC_STATS_COUNTER(cnt_map_sg);
1383
1380 if (!check_device(dev)) 1384 if (!check_device(dev))
1381 return 0; 1385 return 0;
1382 1386