Hi , I am implementing DMA transfers initiated by the processor for the MPC8245. Since the standard pci_alloc_consistent take only a pci_dev structure but no addresses, I added a configuration function to set the target address (PCI) and the other parameters. I can see that the DMA transfer is started, and finished (an interrupt is generated) but I don't see the data copied on the target device ( DSP with a 4 MB memory window on PCI bus.) My question is : What type of addreess must I give to configure the DMA controller. Are there also caching issues that may prevent good read/write operation s? I suppose that the flushing og the cache done in pci_alloc_consistent is enough. Thanks ------------------------------------------------------------------------------ ---- Benoit Callebaut Software Development Engineer Barco | Control Rooms Noordlaan 5, 8520 Kuurne, Belgium
Tel +32(0)56 36 84 28 Fax +32(0)56 36 86 05 mailto:benoit.callebaut at barco.com http://www.barcocontrolrooms.com ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
