From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
To: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, muli@il.ibm.com, alexisb@us.ibm.com,
fujita.tomonori@lab.ntt.co.jp
Subject: [PATCH 0/2] x86: per-device dma_mapping_ops
Date: Tue, 13 May 2008 15:04:50 +0900 [thread overview]
Message-ID: <1210658692-960-1-git-send-email-fujita.tomonori@lab.ntt.co.jp> (raw)
This patchset adds per-device dma_mapping_ops support for
CONFIG_X86_64 like POWER architecture does. This change enables us to
cleanly fix the Calgary IOMMU issue that some devices are not behind
the IOMMU [1]. It also would be helpful to handle KVM PCI passthrough.
A pointer to dma_mapping_ops to struct dev_archdata is added. If the
pointer is non NULL, DMA operations in asm/dma-mapping.h use it. If
it's NULL, the system-wide dma_ops pointer is used as before.
The major obstacle is that dma_mapping_error doesn't take a pointer to
the device unlike other DMA operations. So x86 can't have
dma_mapping_ops per device. Note all the POWER IOMMUs use the same
dma_mapping_error function so this is not a problem for POWER but x86
IOMMUs use different dma_mapping_error functions.
The first patch adds the device argument to dma_mapping_error. The
patch is trivial but large since it touches lots of drivers and
dma-mapping.h in all the architecture.
[1] http://lkml.org/lkml/2008/5/8/423
next reply other threads:[~2008-05-13 6:17 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-13 6:04 FUJITA Tomonori [this message]
2008-05-13 6:04 ` [PATCH 1/2] add the device argument to dma_mapping_error FUJITA Tomonori
2008-05-13 6:04 ` [PATCH 2/2] x86: per-device dma_mapping_ops support FUJITA Tomonori
2008-05-14 5:55 ` Muli Ben-Yehuda
2008-05-15 20:45 ` Yinghai Lu
2008-05-16 3:44 ` FUJITA Tomonori
2008-05-13 15:39 ` [PATCH 1/2] add the device argument to dma_mapping_error Randy Dunlap
2008-05-15 1:12 ` FUJITA Tomonori
2008-05-14 5:49 ` [PATCH 0/2] x86: per-device dma_mapping_ops Muli Ben-Yehuda
2008-05-15 1:12 ` FUJITA Tomonori
2008-05-15 2:00 ` Alexis Bruemmer
2008-05-15 2:30 ` FUJITA Tomonori
2008-05-15 18:21 ` Alexis Bruemmer
2008-05-15 15:17 ` Muli Ben-Yehuda
2008-05-15 15:15 ` Muli Ben-Yehuda
2008-05-15 9:01 ` Andi Kleen
2008-05-15 9:16 ` FUJITA Tomonori
2008-05-15 9:30 ` Andi Kleen
2008-05-15 9:41 ` FUJITA Tomonori
2008-05-15 10:48 ` Andi Kleen
2008-05-15 15:32 ` Muli Ben-Yehuda
2008-05-16 3:44 ` FUJITA Tomonori
2008-05-16 5:24 ` Andi Kleen
2008-05-19 6:32 ` FUJITA Tomonori
2008-05-15 15:26 ` Muli Ben-Yehuda
2008-05-15 21:03 ` Andi Kleen
2008-05-15 21:39 ` Muli Ben-Yehuda
2008-05-15 21:45 ` Andi Kleen
2008-05-15 21:53 ` Muli Ben-Yehuda
2008-05-15 22:05 ` Muli Ben-Yehuda
2008-05-15 18:25 ` Alexis Bruemmer
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