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AMD IOMMU: add statistics about total number of map requests

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Impact: see total number of map requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-12 16:13:04 +01:00
parent 5774f7c5fe
commit 8ecaf8f19f
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@ -75,6 +75,7 @@ DECLARE_STATS_COUNTER(cross_page);
DECLARE_STATS_COUNTER(domain_flush_single);
DECLARE_STATS_COUNTER(domain_flush_all);
DECLARE_STATS_COUNTER(alloced_io_mem);
DECLARE_STATS_COUNTER(total_map_requests);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@ -112,6 +113,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&domain_flush_single);
amd_iommu_stats_add(&domain_flush_all);
amd_iommu_stats_add(&alloced_io_mem);
amd_iommu_stats_add(&total_map_requests);
}
#endif
@ -1229,6 +1231,8 @@ static dma_addr_t __map_single(struct device *dev,
pages = iommu_num_pages(paddr, size, PAGE_SIZE);
paddr &= PAGE_MASK;
INC_STATS_COUNTER(total_map_requests);
if (pages > 1)
INC_STATS_COUNTER(cross_page);