From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sven Luther Subject: Re: request_mem_region problem ... Date: Thu, 31 Oct 2002 09:10:07 +0100 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <20021031081007.GB617@iliana> References: <20021030130016.GA1573@iliana> <1036024416.644.23.camel@daplas> Mime-Version: 1.0 Return-path: Received: from smtp-out-3.wanadoo.fr ([193.252.19.233] helo=mel-rto3.wanadoo.fr) by usw-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 187APL-0005ab-00 for ; Thu, 31 Oct 2002 00:10:27 -0800 Content-Disposition: inline In-Reply-To: <1036024416.644.23.camel@daplas> Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Antonino Daplas Cc: Sven Luther , fbdev On Thu, Oct 31, 2002 at 08:34:05AM +0800, Antonino Daplas wrote: > On Wed, 2002-10-30 at 21:00, Sven Luther wrote: > > Hello, ... > > > > I have begun porting pm3fb to the new api, well, more exactly i am > > adapting tdfxfb to handle pm3 chips, and will port parts of pm3fb to it > > as i need them. > > > > I have a problem when loading pm3fb as a module, and that is that > > request_mem_region fails. I know that pm3_fix.mmio_start and > > pm3_fix.mmio_len are correct, but request_mem_region still fails. > > > > I am still searching the definition of request_mem_region in the source, > > but any help would be most welcome. > > > > Note, this is with stock 2.5.44. > > > Try doing a pci_enable_device() before request_mem_region, maybe that > will help. I already solutioned this problem. BTW, i don't understand how the tdfxfb does not have this problem, as it is from there that i tried to sole this. The problem was that i did : /* Find the mmio register area */ pm3_fix.mmio_start = pci_resource_start(pdev, 0); pm3_fix.mmio_len = pci_resource_len(pdev, 0); And later : if (!request_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0), ... Changing this to : if (!request_mem_region(pm3_fix.mmio_start, pm3_fix.mmio_len, ... Solved the problem, so it seems that the pci_resource_ functions can be called only one time. Is this true ? Now, i seem to have everything fine, but it still hangs in register_framebuffer, a bit of searching has it that it is when register_framebuffer calls take_over_console. I didn't have time for looking into it more yesterday. Still the screen is black, and i see a small (underscore) blinking cursor at the bottom left of the screen. The machine was dead though : Oct 30 23:15:53 iliana kernel: printing eip: Oct 30 23:15:53 iliana kernel: c023affc Oct 30 23:15:53 iliana kernel: Oops: 0000 Oct 30 23:15:53 iliana kernel: pm3fb nls_iso8859-15 nls_cp437 sym53c8xx Oct 30 23:15:53 iliana kernel: CPU: 0 Oct 30 23:15:53 iliana kernel: EIP: 0060:[fbcon_cursor+108/480] Not tainted Oct 30 23:15:53 iliana kernel: EFLAGS: 00010246 Oct 30 23:15:53 iliana kernel: eax: 00000000 ebx: 00000000 ecx: 00000000 edx: c1143240 Oct 30 23:15:53 iliana kernel: esi: c042d280 edi: 00000002 ebp: 00000018 esp: c4dcbc10 Oct 30 23:15:53 iliana kernel: ds: 0068 es: 0068 ss: 0068 Oct 30 23:15:53 iliana kernel: Process modprobe (pid: 495, threadinfo=c4dca000 task=c6bec040) Oct 30 23:15:53 iliana kernel: Stack: 00000000 c04156c0 00000000 00000000 c01f21f8 c1143240 00000002 00000000 Oct 30 23:15:53 iliana kernel: c04156c0 c01f5435 00000000 c039ef20 c03dfe9f 0000339f 000033cf c0414a30 Oct 30 23:15:53 iliana kernel: 00002adf c01275e1 00000000 c0119439 c039ef20 c03dfe9f 00000030 000033cf How, well, maybe i should wait for the new patches from James to be accepted into the linus tree. Notice, maybe this is due to me not having defined yet any of the check_var, set_par, blank, ... functions, but my idea, for the howto afterward, was to write first the most minimal working fbdev. BTW, should i work on james BK tree directly ? Is there an howto on how to do that ? Or could it be possible to get a patch against 2.5.44 ? > > Also, if i register the framebuffer, without defining any of the > > fillrect, copyarea and imageblit functions (even the generic ones) i > > suppose it is normal i only get a black screen, isn't it ? > > > Yes. Ok, as i thought, still : when i try to use the cfb_xxx functions, it does not work. i copied the neofb line in the Makefile so that pm3fb should have added the 3 cfbxxx objects, but it does not work. When loading the cfbxxx.o object files as modules, insmod complains about lack of version in them, so i guess they are not modules. Still, they don't get linked with the pm3fb.o (and neither with the neofb.o when i tried it), and when loading pm3fb.o, i get a message about missing symbols cfb_xxx. So, does the cfb_xxx generic accel stuff get linked correctly when building as modules or am i missing something ? Anyway, thanks for your help. Friendly, Sven Luther ------------------------------------------------------- This sf.net email is sponsored by: Influence the future of Java(TM) technology. Join the Java Community Process(SM) (JCP(SM)) program now. http://ads.sourceforge.net/cgi-bin/redirect.pl?sunm0004en