Date: Sun, 19 Dec 1999 16:34:37 -0800 From: Mike Smith <msmith@freebsd.org> To: Bill Paul <wpaul@skynet.ctr.columbia.edu> Cc: hackers@freebsd.org Subject: Re: USB ethernet hacking Message-ID: <199912200034.QAA03909@mass.cdrom.com> In-Reply-To: Your message of "Sun, 19 Dec 1999 17:18:37 EST." <199912192218.RAA03775@skynet.ctr.columbia.edu>
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> > > I have worked around this for now by hacking usbdi.c so that it polls > > > the controller interrupt/status register instead of tsleep()ing. I'm not > > > sure this is the best solution, but it's the only one that seems to work. > > > > why not use the async method? > > Because this is not an asynchronous task that I'm trying to do here. > I'm talking about reading and writing registers from the ethernet > controller. If this was a PCI device, I'd be using > bus_space_read_X()/bus_space_write_X() to read the registers directly. I > don't want to start reading a register and then come back a while later > to read the results. The code isn't meant to work like that. Unfortunately, given that your 'register read request' is being queued over what is basically a packet-switched network, you're going to have to change the way the code works so that it _can_ work like that. If you don't like it now, imagine how much less you're going to like, say, I2O or SystemIO... -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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