From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com ([134.134.136.20]:18964 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964789AbaKNA0D (ORCPT ); Thu, 13 Nov 2014 19:26:03 -0500 Message-ID: <54654C10.2040102@linux.intel.com> Date: Fri, 14 Nov 2014 08:25:52 +0800 From: Jiang Liu MIME-Version: 1.0 To: Marc Zyngier CC: Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , "grant.likely@linaro.org" , Yijing Wang , Yingjoe Chen , Borislav Petkov , "H. Peter Anvin" , Matthias Brugger , Tony Luck , "linux-kernel@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [Patch V1 0/6] Refine generic/PCI MSI irqodmian interfaces References: <1415879029-20098-1-git-send-email-jiang.liu@linux.intel.com> <54651BE2.9080008@arm.com> In-Reply-To: <54651BE2.9080008@arm.com> Content-Type: text/plain; charset=windows-1252 Sender: linux-pci-owner@vger.kernel.org List-ID: On 2014/11/14 5:00, Marc Zyngier wrote: > On 13/11/14 11:43, Jiang Liu wrote: >> This patch set is based on tip/irq/irqdomain and tries to refine >> interfaces to support irqdomain for generic MSI and PCI MSI. >> >> With this patch set applied, the generic MSI and PCI MSI interfaces >> are much easier to use. For extreme case, you only need to define >> a "struct msi_domain_info" and don't need to implement any callbacks, >> just using the default callbacks is OK:) >> >> This patch set is also a preparation for: >> 1) Kill all weak functions in drivers/pci/msi.c >> 2) Implement support for non-PCI-compliant MSI device > > I've rebased (once more!) the GICv3 ITS driver on top of this, and this > is definitely a major improvement. This is basically the first version > I can use without having to hack into the core code (apart from the > couple of nits I've mentioned earlier). Sorry for the rebasing, but I hope it worthy rebasing:) > > Now, Thomas' idea of putting the irq_domain close to the bus is very > appealing, and I've tweaked an earlier patch in order to do this: I feel that's the right direction. There are other threads discussing associating an MSI controller structure with each PCI bus (at least root bus). http://www.spinics.net/lists/arm-kernel/msg376328.html Regards! Gerry