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To: hackers@freebsd.org
Subject: pci device drivers and user memory mapping code
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Date: Wed, 30 Apr 97 11:16:01 PDT
From: Anne Hutton <hutton@ISI.EDU>
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Hi,

I'm trying to add some code to a pci device driver to do user memory mapping 
and it doesn't seem to be working. I've looked at the device driver tutorial 
on the FreeBSD web pages but find it doesn't go into sufficient detail.

Basically, I have followed the structure for a pci driver and I now need to 
add code which will do a device_mmap, device_ioctl, device_open and 
device_close. I have added a cdevsw to conf.c and added the apropriate 
functions to my driver in /sys/pci. I'm not sure that my data structures in 
the pci driver are correct.

Can anyone provide an outline/help? I'm using FreeBSD 2.1.5.

thanks,

Anne Hutton