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| author | Christoph Hellwig <hch@lst.de> | 2019-02-13 19:19:08 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-02-20 07:27:00 -0700 |
| commit | ddb26d8e1e97af2385cdcabc51e73bf706a6437c (patch) | |
| tree | d0f3066e752e6fc512a4438fe7fc914816f2e965 /drivers/base/Kconfig | |
| parent | ff4c25f26a71b79c70ea03b3935a1297439a8a85 (diff) | |
| download | linux-rt-ddb26d8e1e97af2385cdcabc51e73bf706a6437c.tar.gz | |
dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
This is where all the related code already lives.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/Kconfig')
| -rw-r--r-- | drivers/base/Kconfig | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 3e63a900b330..059700ea3521 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -191,83 +191,6 @@ config DMA_FENCE_TRACE lockup related problems for dma-buffers shared across multiple devices. -config DMA_CMA - bool "DMA Contiguous Memory Allocator" - depends on HAVE_DMA_CONTIGUOUS && CMA - help - This enables the Contiguous Memory Allocator which allows drivers - to allocate big physically-contiguous blocks of memory for use with - hardware components that do not support I/O map nor scatter-gather. - - You can disable CMA by specifying "cma=0" on the kernel's command - line. - - For more information see <include/linux/dma-contiguous.h>. - If unsure, say "n". - -if DMA_CMA -comment "Default contiguous memory area size:" - -config CMA_SIZE_MBYTES - int "Size in Mega Bytes" - depends on !CMA_SIZE_SEL_PERCENTAGE - default 0 if X86 - default 16 - help - Defines the size (in MiB) of the default memory area for Contiguous - Memory Allocator. If the size of 0 is selected, CMA is disabled by - default, but it can be enabled by passing cma=size[MG] to the kernel. - - -config CMA_SIZE_PERCENTAGE - int "Percentage of total memory" - depends on !CMA_SIZE_SEL_MBYTES - default 0 if X86 - default 10 - help - Defines the size of the default memory area for Contiguous Memory - Allocator as a percentage of the total memory in the system. - If 0 percent is selected, CMA is disabled by default, but it can be - enabled by passing cma=size[MG] to the kernel. - -choice - prompt "Selected region size" - default CMA_SIZE_SEL_MBYTES - -config CMA_SIZE_SEL_MBYTES - bool "Use mega bytes value only" - -config CMA_SIZE_SEL_PERCENTAGE - bool "Use percentage value only" - -config CMA_SIZE_SEL_MIN - bool "Use lower value (minimum)" - -config CMA_SIZE_SEL_MAX - bool "Use higher value (maximum)" - -endchoice - -config CMA_ALIGNMENT - int "Maximum PAGE_SIZE order of alignment for contiguous buffers" - range 4 12 - default 8 - help - DMA mapping framework by default aligns all buffers to the smallest - PAGE_SIZE order which is greater than or equal to the requested buffer - size. This works well for buffers up to a few hundreds kilobytes, but - for larger buffers it just a memory waste. With this parameter you can - specify the maximum PAGE_SIZE order for contiguous buffers. Larger - buffers will be aligned only to this specified order. The order is - expressed as a power of two multiplied by the PAGE_SIZE. - - For example, if your system defaults to 4KiB pages, the order value - of 8 means that the buffers will be aligned up to 1MiB only. - - If unsure, leave the default value "8". - -endif - config GENERIC_ARCH_TOPOLOGY bool help |