mirror of
https://github.com/torvalds/linux.git
synced 2026-04-18 14:53:58 -04:00
ff4c25f26a
This API is primarily used through DT entries, but two architectures and two drivers call it directly. So instead of selecting the config symbol for random architectures pull it in implicitly for the actual users. Also rename the Kconfig option to describe the feature better. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Paul Burton <paul.burton@mips.com> # MIPS Acked-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
98 lines
2.1 KiB
Plaintext
98 lines
2.1 KiB
Plaintext
|
|
config HAS_DMA
|
|
bool
|
|
depends on !NO_DMA
|
|
default y
|
|
|
|
config NEED_SG_DMA_LENGTH
|
|
bool
|
|
|
|
config NEED_DMA_MAP_STATE
|
|
bool
|
|
|
|
config ARCH_DMA_ADDR_T_64BIT
|
|
def_bool 64BIT || PHYS_ADDR_T_64BIT
|
|
|
|
config ARCH_HAS_DMA_COHERENCE_H
|
|
bool
|
|
|
|
config DMA_DECLARE_COHERENT
|
|
bool
|
|
|
|
config ARCH_HAS_SETUP_DMA_OPS
|
|
bool
|
|
|
|
config ARCH_HAS_TEARDOWN_DMA_OPS
|
|
bool
|
|
|
|
config ARCH_HAS_SYNC_DMA_FOR_DEVICE
|
|
bool
|
|
|
|
config ARCH_HAS_SYNC_DMA_FOR_CPU
|
|
bool
|
|
select NEED_DMA_MAP_STATE
|
|
|
|
config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
|
|
bool
|
|
|
|
config ARCH_HAS_DMA_COHERENT_TO_PFN
|
|
bool
|
|
|
|
config ARCH_HAS_DMA_MMAP_PGPROT
|
|
bool
|
|
|
|
config DMA_NONCOHERENT_CACHE_SYNC
|
|
bool
|
|
|
|
config DMA_VIRT_OPS
|
|
bool
|
|
depends on HAS_DMA
|
|
|
|
config SWIOTLB
|
|
bool
|
|
select NEED_DMA_MAP_STATE
|
|
|
|
config DMA_REMAP
|
|
depends on MMU
|
|
bool
|
|
|
|
config DMA_DIRECT_REMAP
|
|
bool
|
|
select DMA_REMAP
|
|
|
|
config DMA_API_DEBUG
|
|
bool "Enable debugging of DMA-API usage"
|
|
select NEED_DMA_MAP_STATE
|
|
help
|
|
Enable this option to debug the use of the DMA API by device drivers.
|
|
With this option you will be able to detect common bugs in device
|
|
drivers like double-freeing of DMA mappings or freeing mappings that
|
|
were never allocated.
|
|
|
|
This also attempts to catch cases where a page owned by DMA is
|
|
accessed by the cpu in a way that could cause data corruption. For
|
|
example, this enables cow_user_page() to check that the source page is
|
|
not undergoing DMA.
|
|
|
|
This option causes a performance degradation. Use only if you want to
|
|
debug device drivers and dma interactions.
|
|
|
|
If unsure, say N.
|
|
|
|
config DMA_API_DEBUG_SG
|
|
bool "Debug DMA scatter-gather usage"
|
|
default y
|
|
depends on DMA_API_DEBUG
|
|
help
|
|
Perform extra checking that callers of dma_map_sg() have respected the
|
|
appropriate segment length/boundary limits for the given device when
|
|
preparing DMA scatterlists.
|
|
|
|
This is particularly likely to have been overlooked in cases where the
|
|
dma_map_sg() API is used for general bulk mapping of pages rather than
|
|
preparing literal scatter-gather descriptors, where there is a risk of
|
|
unexpected behaviour from DMA API implementations if the scatterlist
|
|
is technically out-of-spec.
|
|
|
|
If unsure, say N.
|