__dma_direct_optimal_gfp_mask

Name:__dma_direct_optimal_gfp_mask

Proto:static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask, u64 *phys_limit)

Type:gfp_t

Parameter:

Type	Parameter	Name
struct device *	dev
u64	dma_mask
u64 *	phys_limit

62

dma_limit = min_not_zero - return the minimum that is _not_ zero, unless both are zero*@x: value1*@y: value2(dma_mask, upstream dma constraint )

64

If force_dma_unencrypted(dev) Then phys_limit = __dma_to_phys(dev, dma_limit)

66

Else phys_limit = dma_to_phys(dev, dma_limit)

77

If phys_limit <= DMA_BIT_MASK(Most architectures use ZONE_DMA for the first 16 Megabytes, but some use it* it for entirely different regions. In that case the arch code needs to* override the variable below for dma-direct to work properly.) Then Return GFP_DMA

79

If phys_limit <= DMA_BIT_MASK(32) Then Return GFP_DMA32

81

Return 0

**Caller**
Name	Describe
__dma_direct_alloc_pages

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion