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authorAlessandro Rubini <rubini@gnudd.com>2012-04-04 19:40:10 +0200
committerH. Peter Anvin <hpa@zytor.com>2012-04-12 11:10:18 -0700
commitf7219a5300ba753b0c762d631763bd878b8bb00c (patch)
tree3876bd0df1e5a8f9c7b4e606a3c1c4c15976e05c /arch/x86/Kconfig
parent4692d77fc3c8978a36406a3cf9e8b899f86f68f1 (diff)
downloadlinux-f7219a5300ba753b0c762d631763bd878b8bb00c.tar.bz2
x86: Introduce CONFIG_X86_DMA_REMAP
The default functions phys_to_dma, dma_to_phys implement identity mapping as fast inline functions. Some systems, however, may need a custom function to implement its own mapping between CPU addresses and device addresses. This new configuration option allows the functions to be external when needed (such as for the ConneXt device) Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Link: http://lkml.kernel.org/r/6e4329b772df675f1c442f68e59e844e4dd8c965.1333560789.git.rubini@gnudd.com Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 07b412aed38b..95ca56036030 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2220,6 +2220,9 @@ config X86_DEV_DMA_OPS
bool
depends on X86_64
+config X86_DMA_REMAP
+ bool
+
source "net/Kconfig"
source "drivers/Kconfig"