From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Gryniewicz Subject: Re: [PATCH, RFT] bcm43xx: Busting the 1G limit Date: Mon, 19 Jun 2006 19:06:15 -0400 Message-ID: <1150758375.8932.6.camel@athena.fprintf.net> References: <200606171928.08155.mb@bu3sch.de> <1150730630.9048.2.camel@athena.fprintf.net> <200606192243.09039.mb@bu3sch.de> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: bcm43xx-dev@lists.berlios.de, netdev@vger.kernel.org Return-path: Received: from nemesis.fprintf.net ([66.134.112.218]:19460 "EHLO nemesis.fprintf.net") by vger.kernel.org with ESMTP id S964973AbWFSXGS (ORCPT ); Mon, 19 Jun 2006 19:06:18 -0400 To: Michael Buesch In-Reply-To: <200606192243.09039.mb@bu3sch.de> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, 2006-06-19 at 22:43 +0200, Michael Buesch wrote: > On Monday 19 June 2006 17:23, Daniel Gryniewicz wrote: > > On Sat, 2006-06-17 at 19:28 +0200, Michael Buesch wrote: > > > Hi, > > > > > > This patch adds full 32-bit and 64-bit DMA support > > > to the bcm43xx driver. Well, it _should_ do this. I can > > > not test it, as I don't have a machine to trigger the 1G > > > limit. > > > The 1G limit should be exploitable on an AMD64 machine > > > with more than 1G RAM. > > > > > > Please test and report, if it works or not. In the > > > case of "works not", please provide full dmesg log. > > > > > > Note that I am not sure which cards actually support > > > full 32-bit or even 64-bit mode. Older cards might still > > > only support 30-bit DMA. > > > > Hi. > > > > I tried this on both 2.6.17-rc6 and on wireless-dev, and got pretty much > > the same panic on both (modulo locking). My box is a turion with 2 GB > > of ram and a BCM4318. Here's the panic from wireless-dev: > > > > Unable to handle kernel NULL pointer dereference at 0000000000000020 > > RIP: > > {:bcm43xx:bcm43xx_dma_handle_xmitstatus+436} > > I am still not absolutely sure where this oops comes from. > Could you remove at least 1G of your RAM and retry? > I took out 1G of RAM (2 1G sticks), and there was no more panic. It still didn't work (no output from iwlist scan), but also no panic. dmesg output was: Jun 19 18:00:54 athena bcm43xx: Radio turned on Jun 19 18:00:54 athena bcm43xx: ASSERTION FAILED (radio_attenuation < 10) at: drivers/net/wireless/bcm43xx/bcm43xx_phy.c:1485:bcm43xx_find_lopair() Jun 19 18:00:54 athena bcm43xx: ASSERTION FAILED (radio_attenuation < 10) at: drivers/net/wireless/bcm43xx/bcm43xx_phy.c:1485:bcm43xx_find_lopair() Jun 19 18:00:54 athena bcm43xx: Chip initialized Jun 19 18:00:54 athena bcm43xx: 32-bit DMA initialized Jun 19 18:00:54 athena bcm43xx: 80211 cores initialized Jun 19 18:00:54 athena bcm43xx: Keys cleared Jun 19 18:00:54 athena SoftMAC: Associate: Scanning for networks first. Jun 19 18:00:54 athena SoftMAC: Associate: failed to initiate scan. Is device up? followed by a bunch of: Jun 19 18:01:15 athena SoftMAC: Start scanning with channel: 1 Jun 19 18:01:15 athena SoftMAC: Scanning 14 channels Jun 19 18:01:15 athena SoftMAC: Scanning finished followed by: Jun 19 18:02:03 athena SoftMAC: Associate: Scanning for networks first. Jun 19 18:02:03 athena SoftMAC: Start scanning with channel: 1 Jun 19 18:02:03 athena SoftMAC: Scanning 14 channels Jun 19 18:02:03 athena bcm43xx: set security called Jun 19 18:02:03 athena bcm43xx: .level = 0 Jun 19 18:02:03 athena bcm43xx: .enabled = 0 Jun 19 18:02:03 athena bcm43xx: .encrypt = 0 Jun 19 18:02:03 athena SoftMAC: Scanning finished Jun 19 18:02:03 athena SoftMAC: Associate: Scanning for networks first. Jun 19 18:02:03 athena SoftMAC: Start scanning with channel: 1 Jun 19 18:02:03 athena SoftMAC: Scanning 14 channels Jun 19 18:02:03 athena SoftMAC: Scanning finished Jun 19 18:02:03 athena SoftMAC: Associate: Scanning for networks first. Jun 19 18:02:03 athena SoftMAC: Start scanning with channel: 1 Jun 19 18:02:03 athena SoftMAC: Scanning 14 channels Jun 19 18:02:04 athena SoftMAC: Scanning finished Jun 19 18:02:04 athena SoftMAC: Unable to find matching network after scan! and finally: Jun 19 18:02:44 athena bcm43xx: Radio turned off Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0200 (RX) max used slots: 0/64 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x02A0 (TX) max used slots: 0/512 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0280 (TX) max used slots: 0/512 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0260 (TX) max used slots: 0/512 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0240 (TX) max used slots: 0/512 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0220 (TX) max used slots: 2/512 Jun 19 18:02:44 athena bcm43xx: DMA-32 0x0200 (TX) max used slots: 0/512 At that point, I remove the bcm43xx module, and switched over to my prism54 card in order to get net access. This was all on wireless-dev as of yesterday with the 1G limit patch from this thread. Let me know if there's anything I can try, I'd love to get this working properly. Daniel