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FUJITA Tomonori 8d8bb39b9e dma-mapping: add the device argument to dma_mapping_error() ... Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER architecture does: This enables us to cleanly fix the Calgary IOMMU issue that some devices are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423). I think that per-device dma_mapping_ops support would be also helpful for KVM people to support PCI passthrough but Andi thinks that this makes it difficult to support the PCI passthrough (see the above thread). So I CC'ed this to KVM camp. Comments are appreciated. 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. If it's useful for KVM people, I plan to implement a mechanism to register a hook called when a new pci (or dma capable) device is created (it works with hot plugging). It enables IOMMUs to set up an appropriate dma_mapping_ops per device. 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. This patch: dma_mapping_error() doesn't take a pointer to the device unlike other DMA operations. So we can't have dma_mapping_ops per device. Note that POWER already has dma_mapping_ops per device but all the POWER IOMMUs use the same dma_mapping_error function. x86 IOMMUs use device argument. [akpm@linux-foundation.org: fix sge] [akpm@linux-foundation.org: fix svc_rdma] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix bnx2x] [akpm@linux-foundation.org: fix s2io] [akpm@linux-foundation.org: fix pasemi_mac] [akpm@linux-foundation.org: fix sdhci] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc] [akpm@linux-foundation.org: fix ibmvscsi] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		17 years ago
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Kconfig	Driver for IXP4xx built-in Ethernet ports	17 years ago
Makefile	Driver for IXP4xx built-in Ethernet ports	17 years ago
am79c961a.c	ARM: am79c961a: platform_get_irq() may return signed unnoticed	17 years ago
am79c961a.h	fix file specification in comments	19 years ago
at91_ether.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	17 years ago
at91_ether.h	at91_ether: use netstats in net_device structure	17 years ago
ep93xx_eth.c	dma-mapping: add the device argument to dma_mapping_error()	17 years ago
ether1.c	[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()	18 years ago
ether1.h	…
ether3.c	[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()	18 years ago
ether3.h	…
etherh.c	arm: bus_id -> dev_name() and dev_set_name() conversions	17 years ago
ixp4xx_eth.c	ARM: IXP4xx Ethernet NAPI fix	17 years ago