From patchwork Thu Nov 13 11:43:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 410382 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id E15B61400AB for ; Thu, 13 Nov 2014 22:42:50 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932660AbaKMLky (ORCPT ); Thu, 13 Nov 2014 06:40:54 -0500 Received: from mga03.intel.com ([134.134.136.65]:54220 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932328AbaKMLkv (ORCPT ); Thu, 13 Nov 2014 06:40:51 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP; 13 Nov 2014 03:38:24 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,376,1413270000"; d="scan'208";a="607188135" Received: from gerry-dev.bj.intel.com ([10.238.158.52]) by orsmga001.jf.intel.com with ESMTP; 13 Nov 2014 03:40:46 -0800 From: Jiang Liu To: Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , Grant Likely , Marc Zyngier , Yijing Wang , Yingjoe Chen , Borislav Petkov , "H. Peter Anvin" , Matthias Brugger , Jiang Liu , Alexander Gordeev Cc: Tony Luck , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [Patch V1 2/6] PCI, MSI: Introduce helpers to hide struct msi_desc implemenation details Date: Thu, 13 Nov 2014 19:43:44 +0800 Message-Id: <1415879029-20098-3-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1415879029-20098-1-git-send-email-jiang.liu@linux.intel.com> References: <1415879029-20098-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Introduce helpers to hide struct msi_desc implementation details, so we could easily support non-PCI-compliant MSI devices later by moving msi_list into struct device. Signed-off-by: Jiang Liu --- include/linux/msi.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/msi.h b/include/linux/msi.h index 190c7abbec84..714716a3ffdd 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -44,6 +44,25 @@ struct msi_desc { struct msi_msg msg; }; +/* Helpers to hide struct msi_desc implementation details */ +#define msi_desc_to_dev(desc) (&(desc)->dev.dev) +#define dev_to_msi_list(dev) (&to_pci_dev((dev))->msi_list) +#define first_msi_entry(dev) \ + list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list) +#define for_each_msi_entry(desc, dev) \ + list_for_each_entry((desc), dev_to_msi_list((dev)), list) + +#ifdef CONFIG_PCI_MSI +#define first_pci_msi_entry(pdev) first_msi_entry(&(pdev)->dev) +#define for_each_pci_msi_entry(desc, pdev) \ + for_each_msi_entry((desc), &(pdev)->dev) + +static inline struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) +{ + return desc->dev; +} +#endif /* CONFIG_PCI_MSI */ + void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);