- From: Frank Mori Hess <fmhess_at_users.sourceforge.net>
- Date: Fri, 6 Dec 2002 11:10:37 -0600
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wednesday 04 December 2002 02:15 pm, Ed Lankford wrote: > Can anyone suggest a reference for using DMA acquisition with a PCI > board? I have done that with an ISA board, and wonder the peculiarities of > doing it with a PCI board. Thanks. > > Ed Lankford Ed, It really depends on what pci chip you are using, as they are all programmed differently for dma. For isa dma, the dma controller was on the motherboard so it wasn't dependent so much on the plug in card. The kernel functions pci_alloc_consistent() (to allocate a buffer the chip can dma to/from along with an address you can pass to the chip) and pci_set_master() (to enable bus master dma) are also useful. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE98NoQ5vihyNWuA4URApTmAKCw0HZSNK3wpE36XqPvI96jwPwHmwCeKqUt UCfI4W8Z4eTkGFHEjOFlxbg= =3t7N -----END PGP SIGNATURE-----
Received on 2002-12-06Z17:10:37