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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2008-12-12 15:05:16 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:59 +0100 |
| commit | 0f2a86f200bc97ae6cefc5d3ac879094b3fcde48 (patch) | |
| tree | a1ae52873ab4bcda1e9db4cb1f0ff67450832d31 /arch | |
| parent | AMD IOMMU: add stats counter for completion wait events (diff) | |
| download | linux-dev-0f2a86f200bc97ae6cefc5d3ac879094b3fcde48.tar.xz linux-dev-0f2a86f200bc97ae6cefc5d3ac879094b3fcde48.zip | |
AMD IOMMU: add stats counter for map_single requests
Impact: see number of map_single requests in debugfs
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index b21435748e0d..ef377865eb76 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -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; |