1b0fac4587
Continuing the work started in 411f0f3edc ...
This enables code with a dma path, that compiles away, to build without
requiring additional code factoring. It also prevents code that calls
dma_alloc_coherent and dma_free_coherent from linking whereas previously
the code would hit a BUG() at run time. Finally, it allows archs that set
!HAS_DMA to delete their asm/dma-mapping.h file.
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: <geert@linux-m68k.org>
Cc: <zippel@linux-m68k.org>
Cc: <spyro@f2s.com>
Cc: <ysato@users.sourceforge.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
43 lines
1.1 KiB
Text
43 lines
1.1 KiB
Text
#
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# DMA engine configuration
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#
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menu "DMA Engine support"
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depends on HAS_DMA
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config DMA_ENGINE
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bool "Support for DMA engines"
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---help---
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DMA engines offload bulk memory operations from the CPU to dedicated
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hardware, allowing the operations to happen asynchronously.
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comment "DMA Clients"
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config NET_DMA
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bool "Network: TCP receive copy offload"
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depends on DMA_ENGINE && NET
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default y
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---help---
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This enables the use of DMA engines in the network stack to
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offload receive copy-to-user operations, freeing CPU cycles.
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Since this is the main user of the DMA engine, it should be enabled;
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say Y here.
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comment "DMA Devices"
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config INTEL_IOATDMA
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tristate "Intel I/OAT DMA support"
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depends on DMA_ENGINE && PCI
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default m
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---help---
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Enable support for the Intel(R) I/OAT DMA engine.
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config INTEL_IOP_ADMA
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tristate "Intel IOP ADMA support"
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depends on DMA_ENGINE && (ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX)
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select ASYNC_CORE
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default m
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---help---
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Enable support for the Intel(R) IOP Series RAID engines.
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endmenu
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