Allocate dma memory, map io memory for i2o controller
int i2o_pci_alloc(struct i2o_controller * c);
c
I2O controller
Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All IO mappings are also done here. If MTRR is enabled, also do add memory regions here.
Returns 0 on success or negative error code on failure.