Date: Sat, 26 Sep 1998 16:38:14 +0200 (CEST) From: Joachim Kuebart <joki@kuebart.stuttgart.netsurf.de> To: mike@smith.net.au (Mike Smith) Cc: joki@kuebart.stuttgart.netsurf.de, freebsd-current@FreeBSD.ORG Subject: Re: PCI DMA interface documentation Message-ID: <199809261438.QAA01012@yacht.domestic.de> In-Reply-To: <199809260110.SAA02665@dingo.cdrom.com> from Mike Smith at "Sep 25, 98 06:10:19 pm"
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Mike Smith wrote: > > > > I'm trying to write a device driver that utilizes DMA transfers > > to/from a PCI card. Does any documentation exist (apart from > > /sys/pci/*.c) that tells me in what order I have to call which > > functions in order to get things set up properly? I looked a lot > > but somehow I must have missed it :-) > > DMA to/from PCI cards is handled by the card itself, so you will have > to look at the documentation for the card. There are other lessons to > learn as well, but that's where to start. And how about what functions exist at all? I see no documentation of rudimentary stuff like pci_map_*, bus_* and so on. I feel a little left alone with wild guesses like find /sys/dev -name '*.c' | xargs grep map_port | m If that's the way, OK, I'll just take longer. I just don't want to live like that if there's a web page somewhere with details :-) cu Jo --------------------------------------------------------------------- FreeBSD: The Power to Serve <http://www.freebsd.org>; Joachim Kuebart Tel: +49 711 653706 I like to think. Germany To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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