From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8EF7C28EBD for ; Sun, 9 Jun 2019 13:41:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 896542145D for ; Sun, 9 Jun 2019 13:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728850AbfFINlR (ORCPT ); Sun, 9 Jun 2019 09:41:17 -0400 Received: from mga11.intel.com ([192.55.52.93]:32100 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727587AbfFINlQ (ORCPT ); Sun, 9 Jun 2019 09:41:16 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jun 2019 06:41:16 -0700 X-ExtLoop1: 1 Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga003.jf.intel.com with ESMTP; 09 Jun 2019 06:41:16 -0700 From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse , Eric Auger , Alex Williamson , Jean-Philippe Brucker Cc: "Yi Liu" , "Tian, Kevin" , Raj Ashok , "Christoph Hellwig" , "Lu Baolu" , Andriy Shevchenko , Jacob Pan Subject: [PATCH v4 01/22] driver core: Add per device iommu param Date: Sun, 9 Jun 2019 06:44:01 -0700 Message-Id: <1560087862-57608-2-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560087862-57608-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1560087862-57608-1-git-send-email-jacob.jun.pan@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DMA faults can be detected by IOMMU at device level. Adding a pointer to struct device allows IOMMU subsystem to report relevant faults back to the device driver for further handling. For direct assigned device (or user space drivers), guest OS holds responsibility to handle and respond per device IOMMU fault. Therefore we need fault reporting mechanism to propagate faults beyond IOMMU subsystem. There are two other IOMMU data pointers under struct device today, here we introduce iommu_param as a parent pointer such that all device IOMMU data can be consolidated here. The idea was suggested here by Greg KH and Joerg. The name iommu_param is chosen here since iommu_data has been used. Suggested-by: Greg Kroah-Hartman Reviewed-by: Greg Kroah-Hartman Signed-off-by: Jacob Pan Link: https://lkml.org/lkml/2017/10/6/81 --- include/linux/device.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index e85264f..f0a975a 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -42,6 +42,7 @@ struct iommu_ops; struct iommu_group; struct iommu_fwspec; struct dev_pin_info; +struct iommu_param; struct bus_attribute { struct attribute attr; @@ -959,6 +960,7 @@ struct dev_links_info { * device (i.e. the bus driver that discovered the device). * @iommu_group: IOMMU group the device belongs to. * @iommu_fwspec: IOMMU-specific properties supplied by firmware. + * @iommu_param: Per device generic IOMMU runtime data * * @offline_disabled: If set, the device is permanently online. * @offline: Set after successful invocation of bus type's .offline(). @@ -1052,6 +1054,7 @@ struct device { void (*release)(struct device *dev); struct iommu_group *iommu_group; struct iommu_fwspec *iommu_fwspec; + struct iommu_param *iommu_param; bool offline_disabled:1; bool offline:1; -- 2.7.4