iommu: add iommu_num_pages helper function

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Calculating the number of pages from given address and length numbers is a task
required in multiple IOMMU implementations. So implement this as a generic
function into the IOMMU helper code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Joerg Roedel 2008-07-25 14:57:58 +02:00 • committed by Ingo Molnar

parent 024e8ac044

commit 3bc9f79ee1

2 changed files with 9 additions and 0 deletions

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include/linux/iommu-helper.h

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