Provided by: kernel-doc-2.4.27_2.4.27-12_all
pci_pool_create - Creates a pool of pci consistent memory blocks, for
struct pci_pool * pci_pool_create (const char *name, struct pci_dev
*pdev, size_t size, size_t align, size_t allocation, int flags);
name name of pool, for diagnostics
pdev pci device that will be doing the DMA
size size of the blocks in this pool.
align alignment requirement for blocks; must be a power of two
allocation returned blocks won’t cross this boundary (or zero)
flags 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.