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AMD IOMMU: add stats counter for alloc_coherent requests 

Impact: see number of alloc_coherent requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
hifive-unleashed-5.1
Joerg Roedel 2008-12-12 15:14:21 +01:00
parent 55877a6bcd
commit c8f0fb36bf
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_iommu.c
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@ -69,6 +69,7 @@ DECLARE_STATS_COUNTER(cnt_map_single);
DECLARE_STATS_COUNTER(cnt_unmap_single);
DECLARE_STATS_COUNTER(cnt_map_sg);
DECLARE_STATS_COUNTER(cnt_unmap_sg);
DECLARE_STATS_COUNTER(cnt_alloc_coherent);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@ -100,6 +101,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cnt_unmap_single);
amd_iommu_stats_add(&cnt_map_sg);
amd_iommu_stats_add(&cnt_unmap_sg);
amd_iommu_stats_add(&cnt_alloc_coherent);
}
#endif
@ -1481,6 +1483,8 @@ static void *alloc_coherent(struct device *dev, size_t size,
phys_addr_t paddr;
u64 dma_mask = dev->coherent_dma_mask;
INC_STATS_COUNTER(cnt_alloc_coherent);
if (!check_device(dev))
return NULL;