From owner-freebsd-sparc Mon Mar 24 8:59:16 2003 Delivered-To: freebsd-sparc@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C1DBF37B401 for ; Mon, 24 Mar 2003 08:59:13 -0800 (PST) Received: from k6.locore.ca (k6.locore.ca [198.96.117.170]) by mx1.FreeBSD.org (Postfix) with ESMTP id E472443F3F for ; Mon, 24 Mar 2003 08:59:07 -0800 (PST) (envelope-from jake@k6.locore.ca) Received: from k6.locore.ca (localhost.locore.ca [127.0.0.1]) by k6.locore.ca (8.12.8/8.12.8) with ESMTP id h2OH4dxS079667; Mon, 24 Mar 2003 12:04:39 -0500 (EST) (envelope-from jake@k6.locore.ca) Received: (from jake@localhost) by k6.locore.ca (8.12.8/8.12.8/Submit) id h2OH4cxd079666; Mon, 24 Mar 2003 12:04:38 -0500 (EST) Date: Mon, 24 Mar 2003 12:04:38 -0500 From: Jake Burkholder To: Hidetoshi Shimokawa Cc: freebsd-sparc Subject: Re: PCI-PCI bridge Message-ID: <20030324120438.Z76446@locore.ca> References: <20030324075708.X76446@locore.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from simokawa@sat.t.u-tokyo.ac.jp on Tue, Mar 25, 2003 at 12:13:40AM +0900 X-Spam-Status: No, hits=-27.5 required=5.0 tests=AWL,IN_REP_TO,QUOTED_EMAIL_TEXT,REFERENCES, REPLY_WITH_QUOTES,USER_AGENT_MUTT autolearn=ham version=2.50 X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp) Sender: owner-freebsd-sparc@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Apparently, On Tue, Mar 25, 2003 at 12:13:40AM +0900, Hidetoshi Shimokawa said words to the effect of; > At Mon, 24 Mar 2003 07:57:08 -0500, > Jake Burkholder wrote: > > > > Apparently, On Mon, Mar 24, 2003 at 02:04:35PM +0900, > > Hidetoshi Shimokawa said words to the effect of; > > > > > Hi, > > > > > > I have a problem with PCI-PCI bridge on sparc64(sun ultra5) while > > > tesing firewire driver. > > > > > > I have a Adaptec card which has a firewire and a USB2 chips behind > > > PCI-PCI bridge. With this card the DMA trasfer speed is poor and > > > it sometimes causes timeout which leads to panic(*1). > > > > > > I finally found that this is because the PCI-PCI bridge > > > is not configured correctly and setting the cache line size in the > > > bridge by pciconf fixes the problem. > > > (pciconf -w -b pci1:1:0 0x0c 16) > > > > > > Sun's APB PCI-PCI bridges seem to be configured correctly but the one on > > > the card doesn't. > > > Who should configure such bridges? > > > Does upgrading firmware fix the problem? > > > > I think this is the firmware's job but it doesn't always do it. Updating > > the firmware may or may not help. We try to fix this up on startup by > > walking the device tree and initializing all the cache line size registers, > > but I notice that we don't do it for subordinate bridges, only for their > > child devices. > > > > You might try something like this (untested): > > Thanks, I'll try it tomorrow. > > BTW, the latency timer and secondary(?) latency timer of the bridge > are zero too. Shall we configure those values too? > I don't observe significant performance change by changing those > values though. Yes, probably. Again, currently the pci code tries to set the latency timer of child devices correctly, but not the bridge itself. Jake To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-sparc" in the body of the message