From: Joerg Roedel <joerg.roedel@amd.com>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: Re: [PATCH 18/23] AMD IOMMU: simplify dma_mask_to_pages
Date: Thu, 18 Sep 2008 09:32:32 +0200 [thread overview]
Message-ID: <20080918073232.GB24392@amd.com> (raw)
In-Reply-To: <20080918041717S.fujita.tomonori@lab.ntt.co.jp>
On Thu, Sep 18, 2008 at 04:20:20AM +0900, FUJITA Tomonori wrote:
> On Wed, 17 Sep 2008 18:52:52 +0200
> Joerg Roedel <joerg.roedel@amd.com> wrote:
>
> > The current calculation is very complicated. This patch replaces it with
> > a much simpler version.
> >
> > Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
> > ---
> > arch/x86/kernel/amd_iommu.c | 3 +--
> > 1 files changed, 1 insertions(+), 2 deletions(-)
>
> I think that you can use iommu_device_max_index() for what
> dma_mask_to_pages does.
Hmm, in theory yes. But iommu_device_max_index() returns a size in bytes
and not in pages. So I still need to do the page shift somewhere. This
eliminates somewhat the benefit in this particular case.
Joerg
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next prev parent reply other threads:[~2008-09-18 7:32 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-17 16:52 [PATCH 0/23] AMD IOMMU 2.6.28 updates for review Joerg Roedel
2008-09-17 16:52 ` [PATCH 01/23] AMD IOMMU: check for invalid device pointers Joerg Roedel
2008-09-17 16:52 ` [PATCH 02/23] AMD IOMMU: move TLB flushing to the map/unmap helper functions Joerg Roedel
2008-09-17 16:52 ` [PATCH 03/23] AMD IOMMU: implement lazy IO/TLB flushing Joerg Roedel
2008-09-17 19:20 ` FUJITA Tomonori
2008-09-17 19:28 ` Joerg Roedel
2008-09-18 1:29 ` FUJITA Tomonori
2008-09-18 10:13 ` Joerg Roedel
2008-09-18 14:03 ` Joerg Roedel
2008-09-18 23:10 ` FUJITA Tomonori
2008-09-19 6:29 ` Joerg Roedel
2008-09-19 10:21 ` FUJITA Tomonori
2008-09-19 17:43 ` Joerg Roedel
2008-09-19 18:40 ` FUJITA Tomonori
2008-09-19 19:27 ` Joerg Roedel
2008-09-19 18:47 ` Keshavamurthy, Anil S
2008-09-19 18:47 ` Keshavamurthy, Anil S
2008-09-19 18:48 ` Keshavamurthy, Anil S
2008-09-21 9:05 ` Joerg Roedel
2008-09-22 16:26 ` David Woodhouse
2008-09-21 5:27 ` Muli Ben-Yehuda
2008-09-17 16:52 ` [PATCH 04/23] AMD IOMMU: add branch hints to completion wait checks Joerg Roedel
2008-09-17 16:52 ` [PATCH 05/23] AMD IOMMU: align alloc_coherent addresses properly Joerg Roedel
2008-09-17 16:52 ` [PATCH 06/23] AMD IOMMU: add event buffer allocation Joerg Roedel
2008-09-17 16:52 ` [PATCH 07/23] AMD IOMMU: save pci segment from ACPI tables Joerg Roedel
2008-09-17 16:52 ` [PATCH 08/23] AMD IOMMU: save pci_dev instead of devid Joerg Roedel
2008-09-17 16:52 ` [PATCH 09/23] AMD IOMMU: add MSI interrupt support Joerg Roedel
2008-09-17 16:52 ` [PATCH 10/23] AMD IOMMU: add event handling code Joerg Roedel
2008-09-17 16:52 ` [PATCH 11/23] AMD IOMMU: enable event logging Joerg Roedel
2008-09-17 16:52 ` [PATCH 12/23] AMD IOMMU: allow IO page faults from devices Joerg Roedel
2008-09-17 16:52 ` [PATCH 13/23] AMD IOMMU: add dma_supported callback Joerg Roedel
2008-09-17 16:52 ` [PATCH 14/23] AMD IOMMU: don't assing preallocated protection domains to devices Joerg Roedel
2008-09-17 16:52 ` [PATCH 15/23] AMD IOMMU: some set_device_domain cleanups Joerg Roedel
2008-09-17 16:52 ` [PATCH 16/23] AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent Joerg Roedel
2008-09-17 16:52 ` [PATCH 17/23] AMD IOMMU: replace memset with __GFP_ZERO " Joerg Roedel
2008-09-17 16:52 ` [PATCH 18/23] AMD IOMMU: simplify dma_mask_to_pages Joerg Roedel
2008-09-17 19:20 ` FUJITA Tomonori
2008-09-18 7:32 ` Joerg Roedel [this message]
2008-09-18 15:57 ` FUJITA Tomonori
2008-09-18 16:39 ` Joerg Roedel
2008-09-17 16:52 ` [PATCH 19/23] AMD IOMMU: free domain bitmap with its allocation order Joerg Roedel
2008-09-17 16:52 ` [PATCH 20/23] AMD IOMMU: remove unnecessary cast to u64 in the init code Joerg Roedel
2008-09-17 16:52 ` [PATCH 21/23] AMD IOMMU: calculate IVHD size with a function Joerg Roedel
2008-09-17 16:52 ` [PATCH 22/23] AMD IOMMU: use cmd_buf_size when freeing the command buffer Joerg Roedel
2008-09-17 16:52 ` [PATCH 23/23] add AMD IOMMU tree to MAINTAINERS file Joerg Roedel
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