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author | Arthur Kepner <akepner@sgi.com> | 2008-04-29 10:00:30 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 17:06:11 +0200 |
commit | 74bc7ceebfa1c84ddd3a843ebfb56df013bf7ef5 (patch) | |
tree | 548155250fbc7410273125019c70a7c5c085e895 /arch/Kconfig | |
parent | simplify cpu_hotplug_begin()/put_online_cpus() (diff) | |
download | linux-74bc7ceebfa1c84ddd3a843ebfb56df013bf7ef5.tar.xz linux-74bc7ceebfa1c84ddd3a843ebfb56df013bf7ef5.zip |
dma: add dma_*map*_attrs() interfaces
Introduce new interfaces, dma_*map*_attrs(), for passing architecture-specific
attributes when memory is mapped and unmapped for DMA. Give the interfaces
default implementations which ignore attributes. Also introduce the
dma_{set|get}_attr() interfaces for setting and retrieving individual
attributes. Define one attribute, DMA_ATTR_WRITE_BARRIER, in anticipation of
its use by ia64/sn. Select whether architectures implement arch-specific
versions of the dma_*map*_attrs() interfaces via HAVE_DMA_ATTRS in Kconfig.
[markn@au1.ibm.com: dma_{set,get}_attr() have to be static inline]
Signed-off-by: Arthur Kepner <akepner@sgi.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r-- | arch/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 694c9af520bb..3ea332b009e5 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -36,3 +36,6 @@ config HAVE_KPROBES config HAVE_KRETPROBES def_bool n + +config HAVE_DMA_ATTRS + def_bool n |