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AMD IOMMU: add stats counter for free_coherent requests

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Impact: see number of free_coherent requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2008-12-12 15:16:38 +01:00
parent c8f0fb36bf
commit 5d31ee7e08
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@@ -70,6 +70,7 @@ DECLARE_STATS_COUNTER(cnt_unmap_single);
DECLARE_STATS_COUNTER(cnt_map_sg); DECLARE_STATS_COUNTER(cnt_map_sg);
DECLARE_STATS_COUNTER(cnt_unmap_sg); DECLARE_STATS_COUNTER(cnt_unmap_sg);
DECLARE_STATS_COUNTER(cnt_alloc_coherent); DECLARE_STATS_COUNTER(cnt_alloc_coherent);
DECLARE_STATS_COUNTER(cnt_free_coherent);
static struct dentry *stats_dir; static struct dentry *stats_dir;
static struct dentry *de_isolate; static struct dentry *de_isolate;
@@ -102,6 +103,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cnt_map_sg); amd_iommu_stats_add(&cnt_map_sg);
amd_iommu_stats_add(&cnt_unmap_sg); amd_iommu_stats_add(&cnt_unmap_sg);
amd_iommu_stats_add(&cnt_alloc_coherent); amd_iommu_stats_add(&cnt_alloc_coherent);
amd_iommu_stats_add(&cnt_free_coherent);
} }
#endif #endif
@@ -1541,6 +1543,8 @@ static void free_coherent(struct device *dev, size_t size,
struct protection_domain *domain; struct protection_domain *domain;
u16 devid; u16 devid;
INC_STATS_COUNTER(cnt_free_coherent);
if (!check_device(dev)) if (!check_device(dev))
return; return;