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AMD IOMMU: add stats counter for map_sg requests

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Impact: see number of map_sg requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-12 15:09:48 +01:00
parent 146a6917fc
commit d03f067a9d
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@ -67,6 +67,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid);
DECLARE_STATS_COUNTER(compl_wait); DECLARE_STATS_COUNTER(compl_wait);
DECLARE_STATS_COUNTER(cnt_map_single); DECLARE_STATS_COUNTER(cnt_map_single);
DECLARE_STATS_COUNTER(cnt_unmap_single); DECLARE_STATS_COUNTER(cnt_unmap_single);
DECLARE_STATS_COUNTER(cnt_map_sg);
static struct dentry *stats_dir; static struct dentry *stats_dir;
static struct dentry *de_isolate; 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(&compl_wait);
amd_iommu_stats_add(&cnt_map_single); amd_iommu_stats_add(&cnt_map_single);
amd_iommu_stats_add(&cnt_unmap_single); amd_iommu_stats_add(&cnt_unmap_single);
amd_iommu_stats_add(&cnt_map_sg);
} }
#endif #endif
@ -1377,6 +1379,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
int mapped_elems = 0; int mapped_elems = 0;
u64 dma_mask; u64 dma_mask;
INC_STATS_COUNTER(cnt_map_sg);
if (!check_device(dev)) if (!check_device(dev))
return 0; return 0;