Date: Sat, 26 Sep 1998 08:39:10 -0700 From: Mike Smith <mike@smith.net.au> To: Joachim Kuebart <joki@kuebart.stuttgart.netsurf.de> Cc: mike@smith.net.au (Mike Smith), freebsd-current@FreeBSD.ORG Subject: Re: PCI DMA interface documentation Message-ID: <199809261539.IAA05822@word.smith.net.au> In-Reply-To: Your message of "Sat, 26 Sep 1998 16:38:14 %2B0200." <199809261438.QAA01012@yacht.domestic.de>
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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 :-) Look at another driver that does more or less what yours does. There's no static documentation for the pci_* functions, no. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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