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>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 71646c8..859ca74 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -67,6 +67,7 @@
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 @@
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 @@
int mapped_elems = 0;
u64 dma_mask;
+ INC_STATS_COUNTER(cnt_map_sg);
+
if (!check_device(dev))
return 0;