linux/arch
Mark Nelson f9226d572d powerpc: Update remaining dma_mapping_ops to use map/unmap_page
After the merge of the 32 and 64bit DMA code, dma_direct_ops lost
their map/unmap_single() functions but gained map/unmap_page().  This
caused a problem for Cell because Cell's dma_iommu_fixed_ops called
the dma_direct_ops if the fixed linear mapping was to be used or the
iommu ops if the dynamic window was to be used.  So in order to fix
this problem we need to update the 64bit DMA code to use
map/unmap_page.

First, we update the generic IOMMU code so that iommu_map_single()
becomes iommu_map_page() and iommu_unmap_single() becomes
iommu_unmap_page().  Then we propagate these changes up through all
the callers of these two functions and in the process update all the
dma_mapping_ops so that they have map/unmap_page rahter than
map/unmap_single.  We can do this because on 64bit there is no HIGHMEM
memory so map/unmap_page ends up performing exactly the same function
as map/unmap_single, just taking different arguments.

This has no affect on drivers because the dma_map_single_attrs() just
ends up calling the map_page() function of the appropriate
dma_mapping_ops and similarly the dma_unmap_single_attrs() calls
unmap_page().

This fixes an oops on Cell blades, which oops on boot without this
because they call dma_direct_ops.map_single, which is NULL.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-10-31 16:13:48 +11:00
..
alpha Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-23 10:53:02 -07:00
arm Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-23 16:06:49 -07:00
avr32 Merge branches 'boards' and 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 2008-10-23 15:24:10 +02:00
blackfin container freezer: implement freezer cgroup subsystem 2008-10-20 08:52:34 -07:00
cris Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 2008-10-23 08:20:34 -07:00
frv container freezer: implement freezer cgroup subsystem 2008-10-20 08:52:34 -07:00
h8300 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 2008-10-23 08:20:34 -07:00
ia64 Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-23 10:53:02 -07:00
m32r Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile 2008-10-23 10:05:40 -07:00
m68k proc: move /proc/stram to m68k-specific code 2008-10-23 14:25:35 +04:00
m68knommu container freezer: implement freezer cgroup subsystem 2008-10-20 08:52:34 -07:00
mips TXx9: Add TX4938 ATA support (v3) 2008-10-23 23:22:08 +02:00
mn10300 mn10300: use bcd2bin/bin2bcd 2008-10-20 08:52:41 -07:00
parisc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2008-10-23 10:22:40 -07:00
powerpc powerpc: Update remaining dma_mapping_ops to use map/unmap_page 2008-10-31 16:13:48 +11:00
s390 container freezer: implement freezer cgroup subsystem 2008-10-20 08:52:34 -07:00
sh sh: asm/gpio.h needs linux/kernel.h for might_sleep()/WARN_ON(). 2008-10-23 12:37:20 +09:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6 2008-10-23 19:19:14 -07:00
sparc64 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6 2008-10-23 19:19:14 -07:00
um Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev 2008-10-23 10:23:07 -07:00
x86 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-23 12:38:39 -07:00
xtensa Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6 2008-10-23 09:16:56 -07:00
.gitignore
Kconfig Kconfig: eliminate "def_bool n" constructs 2008-10-16 11:21:31 -07:00