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Commit c8f0fb36 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add stats counter for alloc_coherent requests



Impact: see number of alloc_coherent requests in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 55877a6b
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+4 −0
Original line number Original line Diff line number Diff line
@@ -69,6 +69,7 @@ DECLARE_STATS_COUNTER(cnt_map_single);
DECLARE_STATS_COUNTER(cnt_unmap_single);
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);


static struct dentry *stats_dir;
static struct dentry *stats_dir;
static struct dentry *de_isolate;
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_unmap_single);
	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);
}
}


#endif
#endif
@@ -1481,6 +1483,8 @@ static void *alloc_coherent(struct device *dev, size_t size,
	phys_addr_t paddr;
	phys_addr_t paddr;
	u64 dma_mask = dev->coherent_dma_mask;
	u64 dma_mask = dev->coherent_dma_mask;


	INC_STATS_COUNTER(cnt_alloc_coherent);

	if (!check_device(dev))
	if (!check_device(dev))
		return NULL;
		return NULL;