x86 gart: reimplement IOMMU_LEAK feature by using DMA_API_DEBUG

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IOMMU_LEAK, GART's own feature, dumps the used IOMMU entries when
IOMMU entries is full, which might be useful to find a bad driver that
eats IOMMU entries.

DMA_API_DEBUG provides the similar feature, debug_dma_dump_mappings,
and it's better than GART's IOMMU_LEAK feature. GART's IOMMU_LEAK
feature doesn't say who uses IOMMU entries so it's hard to find a bad
driver.

This patch reimplements the GART's IOMMU_LEAK feature by using
DMA_API_DEBUG.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1239669799-23579-2-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

FUJITA Tomonori 2009-04-14 09:43:19 +09:00 • committed by Ingo Molnar

parent e6a1a89d57

commit 19c1a6f576

2 changed files with 9 additions and 39 deletions

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3

arch/x86/Kconfig.debug

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45

arch/x86/kernel/pci-gart_64.c

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