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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-12 15:14:21 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:59 +0100
commitc8f0fb36bffa9e21d214a2910b825567d52bfc2c (patch)
tree6bd89aae7d27da187c5bb8484d09527f2c3725d0
parent55877a6bcdf0843414eecc658550c6551f5b5e1d (diff)
downloadlinux-stericsson-c8f0fb36bffa9e21d214a2910b825567d52bfc2c.tar.gz
AMD IOMMU: add stats counter for alloc_coherent requests
Impact: see number of alloc_coherent requests in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
-rw-r--r--arch/x86/kernel/amd_iommu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 49f2c8533e12..ecc89f8857b6 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -69,6 +69,7 @@ DECLARE_STATS_COUNTER(cnt_map_single);
DECLARE_STATS_COUNTER(cnt_unmap_single);
DECLARE_STATS_COUNTER(cnt_map_sg);
DECLARE_STATS_COUNTER(cnt_unmap_sg);
+DECLARE_STATS_COUNTER(cnt_alloc_coherent);
static struct dentry *stats_dir;
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_map_sg);
amd_iommu_stats_add(&cnt_unmap_sg);
+ amd_iommu_stats_add(&cnt_alloc_coherent);
}
#endif
@@ -1481,6 +1483,8 @@ static void *alloc_coherent(struct device *dev, size_t size,
phys_addr_t paddr;
u64 dma_mask = dev->coherent_dma_mask;
+ INC_STATS_COUNTER(cnt_alloc_coherent);
+
if (!check_device(dev))
return NULL;