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DMA_POOL_ALLOC(9) Memory Management in Linux DMA_POOL_ALLOC(9)

NAME

dma_pool_alloc - get a block of consistent memory

SYNOPSIS

void * dma_pool_alloc(struct dma_pool * pool, gfp_t mem_flags, dma_addr_t * handle);

ARGUMENTS

pool
dma pool that will produce the block

mem_flags

GFP_* bitmask

handle

pointer to dma address of block

DESCRIPTION

This returns the kernel virtual address of a currently unused block, and reports its dma address through the handle. If such a memory block can't be allocated, NULL is returned.

COPYRIGHT

April 2019 Kernel Hackers Manual 4.9.