The Linux Kernel API | ||
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name of pool, for diagnostics
pci device that will be doing the DMA
size of the blocks in this pool.
alignment requirement for blocks; must be a power of two
returned blocks won't cross this boundary (or zero)
SLAB_* flags (not all are supported).
Returns a pci allocation pool with the requested characteristics, or null if one can't be created. Given one of these pools, pci_pool_alloc may be used to allocate memory. Such memory will all have "consistent" DMA mappings, accessible by the device and its driver without using cache flushing primitives. The actual size of blocks allocated may be larger than requested because of alignment.
If allocation is nonzero, objects returned from pci_pool_alloc won't cross that size boundary. This is useful for devices which have addressing restrictions on individual DMA transfers, such as not crossing boundaries of 4KBytes.
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