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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>
hifive-unleashed-5.1
Joerg Roedel 2008-12-12 15:12:14 +01:00
parent d03f067a9d
commit 55877a6bcd
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@ -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;