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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

arch/x86/kernel/amd_iommu.c

+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;