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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-12 15:57:30 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:12:00 +0100
commit5774f7c5fef2526bfa58eab628fbe91dce5e07b1 (patch)
tree38d0ab41a4b188572de1773574f1d506bb016234 /arch
parent18811f55d48e5f3ee70c4744c592f940022fa592 (diff)
AMD IOMMU: add statistics about allocated io memory
Impact: see amount of allocated io memory in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a897c7246dc..69f367b033a 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -74,6 +74,7 @@ DECLARE_STATS_COUNTER(cnt_free_coherent);
DECLARE_STATS_COUNTER(cross_page);
DECLARE_STATS_COUNTER(domain_flush_single);
DECLARE_STATS_COUNTER(domain_flush_all);
+DECLARE_STATS_COUNTER(alloced_io_mem);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@@ -110,6 +111,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cross_page);
amd_iommu_stats_add(&domain_flush_single);
amd_iommu_stats_add(&domain_flush_all);
+ amd_iommu_stats_add(&alloced_io_mem);
}
#endif
@@ -1246,6 +1248,8 @@ static dma_addr_t __map_single(struct device *dev,
}
address += offset;
+ ADD_STATS_COUNTER(alloced_io_mem, size);
+
if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {
iommu_flush_tlb(iommu, dma_dom->domain.id);
dma_dom->need_flush = false;
@@ -1282,6 +1286,8 @@ static void __unmap_single(struct amd_iommu *iommu,
start += PAGE_SIZE;
}
+ SUB_STATS_COUNTER(alloced_io_mem, size);
+
dma_ops_free_addresses(dma_dom, dma_addr, pages);
if (amd_iommu_unmap_flush || dma_dom->need_flush) {