AMD IOMMU: add stats counter for map_single requests (0f2a86f2) · Commits · 戴 / test

arch/x86/kernel/amd_iommu.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -65,6 +65,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid);
		*/

		DECLARE_STATS_COUNTER(compl_wait);
		DECLARE_STATS_COUNTER(cnt_map_single);

		static struct dentry *stats_dir;
		static struct dentry *de_isolate;
		@@ -92,6 +93,7 @@ static void amd_iommu_stats_init(void)
		(u32 *)&amd_iommu_unmap_flush);

		amd_iommu_stats_add(&compl_wait);
		amd_iommu_stats_add(&cnt_map_single);
		}

		#endif
		@@ -1278,6 +1280,8 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
		dma_addr_t addr;
		u64 dma_mask;

		INC_STATS_COUNTER(cnt_map_single);

		if (!check_device(dev))
		return bad_dma_address;