Message-Id: <200410062020.i96KKPN13520@raceme.attbi.com>
Subject: Driver access ito PCI card memory space question.
To: linux-kernel@vger.kernel.org
Date: Wed, 6 Oct 2004 15:20:25 -0500 (CDT)
From: kilian@bobodyne.com (Alan Kilian)
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  Folks,

     I'm not sure how to access the memory spaces on my PCI card.

     I do 


     From /var/log/messages:

		SSE: Start of card attachment.
		SSE: Found a DeCypher card, interrupting on line 3
		SSE: Bar0 From 0xfeaff000 to 0xfeafffff F=0x200 MEMORY space
		SSE: Bar1 From 0xfeafc000 to 0xfeafdfff F=0x200 MEMORY space
		SSE: Bar2 From 0xfe000000 to 0xfe7fffff F=0x200 MEMORY space

     My driver detects the card, and asks about the memory areas.

     Then I do request_mem_area(0xfeaff000,4095, "SSE");

     Then I do a readl(0xfeaff100); and get this:

        Unable to handle kernel paging request at virtual address feaff100

     Any hints? Maybe these are byte-addresses, and I need to do:
     readl(0xfeaff100>>2);

     I'm just beginning this adventure, so please excuse the basic 
     questions.

                           -Alan

-- 
- Alan Kilian <kilian(at)timelogic.com> 
Director of Bioinformatics, TimeLogic Corporation 763-449-7622
-
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