android_kernel_xiaomi_sm8350/arch/powerpc/platforms
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>
2008-07-26 12:00:03 -07:00
..
8xx powerpc/CPM: Add i2c pins to dts and board setup 2008-07-14 07:55:39 -05:00
40x
44x powerpc/44x: Support NAND boot for Rev A Warp boards 2008-07-09 13:36:39 -04:00
52xx Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2008-07-25 11:08:17 -07:00
82xx Revert "powerpc/ep8248e: Fix compile problem if !CONFIG_FS_ENET" 2008-07-16 17:59:47 -05:00
83xx powerpc/83xx: fix ULPI setup for MPC8315 processors 2008-07-16 17:57:37 -05:00
85xx powerpc: Remove Kconfig PPC_CPM_NEW_BINDING 2008-07-16 17:57:50 -05:00
86xx powerpc/85xx/86xx: some refactoring for fsl_uli1575 code 2008-07-16 17:57:42 -05:00
512x powerpc/mpc5121: Add support for CPLD on MPC5121ADS board 2008-07-12 12:10:55 -06:00
cell dma-mapping: add the device argument to dma_mapping_error() 2008-07-26 12:00:03 -07:00
chrp driver core: fix a lot of printk usages of bus_id 2008-07-21 21:54:53 -07:00
embedded6xx powerpc: Add C2K to configuration 2008-06-09 13:42:29 +10:00
iseries dma-mapping: add the device argument to dma_mapping_error() 2008-07-26 12:00:03 -07:00
maple [POWERPC] Fix sparse warnings in arch/powerpc/kernel 2008-05-14 22:31:59 +10:00
pasemi powerpc/pseries: iommu enablement for CMO 2008-07-25 15:44:43 +10:00
powermac kgdb, powerpc: arch specific powerpc kgdb support 2008-07-23 11:30:15 -05:00
prep
ps3 powerpc/ps3: Add a sub-match id to ps3_system_bus 2008-07-22 10:39:33 +10:00
pseries powerpc/pseries: iommu enablement for CMO 2008-07-25 15:44:43 +10:00
fsl_uli1575.c powerpc/85xx/86xx: some refactoring for fsl_uli1575 code 2008-07-16 17:57:42 -05:00
Kconfig powerpc: Remove Kconfig PPC_CPM_NEW_BINDING 2008-07-16 17:57:50 -05:00
Kconfig.cputype powerpc: Remove duplicate 6xx option in Kconfig 2008-07-22 10:39:35 +10:00
Makefile [POWERPC] celleb: Move miscellaneous files for Beat 2008-04-24 21:08:14 +10:00