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Commit 55877a6b authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add stats counter for unmap_sg requests 



Impact: see number of unmap_sg requests in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent d03f067a

arch/x86/kernel/amd_iommu.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -68,6 +68,7 @@ DECLARE_STATS_COUNTER(compl_wait); 
DECLARE_STATS_COUNTER(cnt_map_single);

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);





static struct dentry *stats_dir;

static struct dentry *stats_dir;

static struct dentry *de_isolate;

static struct dentry *de_isolate;
@@ -98,6 +99,7 @@ static void amd_iommu_stats_init(void) 
	amd_iommu_stats_add(&cnt_map_single);

	amd_iommu_stats_add(&cnt_map_single);

	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);

}

}





#endif

#endif
@@ -1443,6 +1445,8 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist, 
	u16 devid;

	u16 devid;

	int i;

	int i;





	INC_STATS_COUNTER(cnt_unmap_sg);



	if (!check_device(dev) ||

	if (!check_device(dev) ||

	    !get_device_resources(dev, &iommu, &domain, &devid))

	    !get_device_resources(dev, &iommu, &domain, &devid))

		return;

		return;