From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756370AbaITQcD (ORCPT ); Sat, 20 Sep 2014 12:32:03 -0400 Received: from mail-bl2on0114.outbound.protection.outlook.com ([65.55.169.114]:40194 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756137AbaITQb7 (ORCPT ); Sat, 20 Sep 2014 12:31:59 -0400 X-WSS-ID: 0NC7KL2-08-00N-02 X-M-MSG: From: To: , , CC: , , , , , , , , , , , "Suravee Suthikulpanit" , Mark Rutland Subject: [V8 1/2] irqchip: gic: Add support for multiple MSI for ARM64 Date: Sat, 20 Sep 2014 09:31:37 -0700 Message-ID: <1411230698-8081-2-git-send-email-suravee.suthikulpanit@amd.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1411230698-8081-1-git-send-email-suravee.suthikulpanit@amd.com> References: <1411230698-8081-1-git-send-email-suravee.suthikulpanit@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.222;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(428002)(199003)(189002)(33646002)(36756003)(105586002)(77982003)(4396001)(229853001)(106466001)(90102001)(74502003)(80022003)(77156001)(81342003)(46102003)(47776003)(74662003)(77096002)(81542003)(76482002)(85306004)(95666004)(50466002)(48376002)(107046002)(50986999)(97736003)(92566001)(76176999)(21056001)(44976005)(2201001)(92726001)(53416004)(86362001)(85852003)(31966008)(86152002)(68736004)(83322001)(19580405001)(19580395003)(84676001)(62966002)(89996001)(50226001)(64706001)(104166001)(79102003)(20776003)(101416001)(87286001)(102836001)(99396002)(83072002)(87936001)(2004002);DIR:OUT;SFP:1102;SCL:1;SRVR:BY1PR0201MB1078;H:atltwp02.amd.com;FPR:;MLV:sfv;PTR:InfoDomainNonexistent;A:1;MX:1;LANG:en; X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0201MB1078; X-Forefront-PRVS: 0340850FCD Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=Suravee.Suthikulpanit@amd.com; X-OriginatorOrg: amd4.onmicrosoft.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Suravee Suthikulpanit This patch implelments the ARM64 version of arch_setup_msi_irqs(), which does not return 1 for when PCI_CAP_ID_MSI and nvec > 1. Signed-off-by: Suravee Suthikulpanit Acked-by: Marc Zyngier Cc: Mark Rutland Cc: Jason Cooper Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/msi.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) create mode 100644 arch/arm64/kernel/msi.c diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index df7ef87..a921c42 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -29,6 +29,7 @@ arm64-obj-$(CONFIG_ARM64_CPU_SUSPEND) += sleep.o suspend.o arm64-obj-$(CONFIG_JUMP_LABEL) += jump_label.o arm64-obj-$(CONFIG_KGDB) += kgdb.o arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o +arm64-obj-$(CONFIG_PCI_MSI) += msi.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) diff --git a/arch/arm64/kernel/msi.c b/arch/arm64/kernel/msi.c new file mode 100644 index 0000000..a295862 --- /dev/null +++ b/arch/arm64/kernel/msi.c @@ -0,0 +1,41 @@ +/* + * ARM64 architectural MSI implemention + * + * Support for Message Signalelled Interrupts for systems that + * implement ARM Generic Interrupt Controller: GICv2m. + * + * Copyright (C) 2014 Advanced Micro Devices, Inc. + * Authors: Suravee Suthikulpanit + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include +#include +#include + +/* + * ARM64 function for seting up MSI irqs. + * Based on driver/pci/msi.c: arch_setup_msi_irqs(). + * + * Note: + * Current implementation assumes that all interrupt controller used in + * ARM64 architecture _MUST_ supports multi-MSI. + */ +int arm64_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +{ + struct msi_desc *entry; + int ret; + + list_for_each_entry(entry, &dev->msi_list, list) { + ret = arch_setup_msi_irq(dev, entry); + if (ret < 0) + return ret; + if (ret > 0) + return -ENOSPC; + } + + return 0; +} -- 1.9.3