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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-12-12 15:57:30 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:12:00 +0100 |
| commit | 5774f7c5fef2526bfa58eab628fbe91dce5e07b1 (patch) | |
| tree | 38d0ab41a4b188572de1773574f1d506bb016234 /arch | |
| parent | 18811f55d48e5f3ee70c4744c592f940022fa592 (diff) | |
| download | linux-5774f7c5fef2526bfa58eab628fbe91dce5e07b1.tar.bz2 | |
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.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index a897c7246dca..69f367b033a2 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) { |