From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755693AbcIGNB4 (ORCPT ); Wed, 7 Sep 2016 09:01:56 -0400 Received: from mail-yw0-f176.google.com ([209.85.161.176]:35392 "EHLO mail-yw0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751970AbcIGNBy (ORCPT ); Wed, 7 Sep 2016 09:01:54 -0400 Subject: Re: [UPDATE PATCH V10 2/8] ACPI: Add new IORT functions to support MSI domain handling To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, helgaas@kernel.org, rafael@kernel.org, Lorenzo.Pieralisi@arm.com References: <1473152938-17388-3-git-send-email-tn@semihalf.com> <1473249493-20271-1-git-send-email-tn@semihalf.com> Cc: will.deacon@arm.com, catalin.marinas@arm.com, hanjun.guo@linaro.org, shijie.huang@arm.com, robert.richter@caviumnetworks.com, mw@semihalf.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, andrea.gallo@linaro.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, al.stone@linaro.org, graeme.gregory@linaro.org, ddaney.cavm@gmail.com, okaya@codeaurora.org From: Tomasz Nowicki Message-ID: Date: Wed, 7 Sep 2016 15:01:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <1473249493-20271-1-git-send-email-tn@semihalf.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07.09.2016 13:58, Tomasz Nowicki wrote: > For ITS, MSI functionality consists on building domain stack and > during that process we need to reference to domain stack components > e.g. before we create new DOMAIN_BUS_PCI_MSI domain we need to specify > its DOMAIN_BUS_NEXUS parent domain. In order to manage that process > properly, maintain list which elements contain domain token > (unique for MSI domain stack) and ITS ID: iort_register_domain_token() > and iort_deregister_domain_token(). Then retrieve domain token > any time later with ITS ID being key off: iort_find_domain_token(). > With domain token and domain type we are able to find corresponding > IRQ domain. > > Since IORT is prepared to describe MSI domain on a per-device basis, > use existing IORT helpers and implement two calls: > 1. iort_msi_map_rid() to map MSI RID for a device > 2. iort_get_device_domain() to find domain token for a device > > Signed-off-by: Tomasz Nowicki > Reviewed-by: Hanjun Guo > > Conflicts: > drivers/acpi/arm64/iort.c Rebase leftover ^^^, sorry. Tomasz