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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-12 15:12:14 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:59 +0100
commit55877a6bcdf0843414eecc658550c6551f5b5e1d (patch)
tree360fcc7c677260b372c5875a7b88966f79752eee
parentd03f067a9d0a1cc09529427af9a15e15d32ba1de (diff)
AMD IOMMU: add stats counter for unmap_sg requests
Impact: see number of unmap_sg requests in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
-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 859ca741745..49f2c8533e1 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -68,6 +68,7 @@ DECLARE_STATS_COUNTER(compl_wait);
DECLARE_STATS_COUNTER(cnt_map_single);
DECLARE_STATS_COUNTER(cnt_unmap_single);
DECLARE_STATS_COUNTER(cnt_map_sg);
+DECLARE_STATS_COUNTER(cnt_unmap_sg);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@@ -98,6 +99,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cnt_map_single);
amd_iommu_stats_add(&cnt_unmap_single);
amd_iommu_stats_add(&cnt_map_sg);
+ amd_iommu_stats_add(&cnt_unmap_sg);
}
#endif
@@ -1443,6 +1445,8 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
u16 devid;
int i;
+ INC_STATS_COUNTER(cnt_unmap_sg);
+
if (!check_device(dev) ||
!get_device_resources(dev, &iommu, &domain, &devid))
return;