From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756114AbYEOCEI (ORCPT ); Wed, 14 May 2008 22:04:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751904AbYEOCD4 (ORCPT ); Wed, 14 May 2008 22:03:56 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:37137 "EHLO e35.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751802AbYEOCDz (ORCPT ); Wed, 14 May 2008 22:03:55 -0400 Subject: Re: [PATCH 0/2] x86: per-device dma_mapping_ops From: Alexis Bruemmer To: FUJITA Tomonori Cc: muli@il.ibm.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org In-Reply-To: <20080515101212Z.tomof@acm.org> References: <1210658692-960-1-git-send-email-fujita.tomonori@lab.ntt.co.jp> <20080514054924.GD6682@il.ibm.com> <20080515101212Z.tomof@acm.org> Content-Type: text/plain; charset=utf-8 Date: Wed, 14 May 2008 19:00:13 -0700 Message-Id: <1210816813.5596.13.camel@alexis> Mime-Version: 1.0 X-Mailer: Evolution 2.22.1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2008-05-15 at 10:12 +0900, FUJITA Tomonori wrote: > On Wed, 14 May 2008 08:49:24 +0300 > Muli Ben-Yehuda wrote: > > > On Tue, May 13, 2008 at 03:04:50PM +0900, FUJITA Tomonori wrote: > > Awesome! Much needed, thank you for doing this. > > No problem. Well, as you know, it's just a base. We need more work to > solve the problems on the top of this. Yes thank you! > > I'd like to have a mechanism to register a hook called when a new pci > (or dma capable) device is created. It enables IOMMUs to set up an > appropriate dma_mapping_ops per device. It could also enables us to > simplify the IOMMUs code to initilize devices at startup (for exmple, > intel-iommu checks all the pci devices and creates a domain per device > if necessary). I wanted to try and create a test version of this, at least for the calgary side, but ran into an error with this patch set: Fusion MPT SAS Host driver 3.04.06 ACPI: PCI Interrupt 0000:34:00.0[A] -> GSI 142 (level, low) -> IRQ 142 mptbase: ioc0: Initiating bringup ioc0: LSISAS1078 C1: Capabilities={Initiator} mptbase: ioc0: PCI-MSI enabled Calgary: DMA error on CalIOC2 PHB 0x33 Calgary: 0x02000000@CSR 0x00000000@PLSSR 0xb0008000@CSMR 0x00000000@MCK Calgary: 0x00000000@0x810 0xfee0c000@0x820 0x00000000@0x830 0x00000000@0x840 0x03804a00@0x850 0x00000000@0x860 0x00000000@0x870 Calgary: 0x00000000@0xcb0 mptbase: ioc0: Initiating recovery mptbase: ioc0: WARNING - Unexpected doorbell active! mptbase: ioc0: WARNING - NOT READY! mptbase: ioc0: WARNING - Cannot recover rc = -1! mptbase: ioc0: WARNING - Firmware Reload FAILED! Clocksource tsc unstable (delta = 48333779773 ns) Not sure what is causing this error, but will keep digging. Any ideas? --Alexis