Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753129Ab3ISHhM (ORCPT ); Thu, 19 Sep 2013 03:37:12 -0400 Received: from tx2ehsobe005.messaging.microsoft.com ([65.55.88.15]:23066 "EHLO tx2outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752253Ab3ISHhD (ORCPT ); Thu, 19 Sep 2013 03:37:03 -0400 X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPV:NLI;H:mail.freescale.net;RD:none;EFVD:NLI X-SpamScore: 8 X-BigFish: VS8(zzzz1f42h208ch1ee6h1de0h1fdah2073h1202h1e76h1d1ah1d2ah1fc6h1082kz70kd2iz1de098h1de097h8275bhz2dh2a8h839he5bhf0ah107ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh1fb3h1d0ch1d2eh1d3fh1dfeh1dffh1e1dh1e23h1fe8h1ff5h20cfi1155h) From: Bharat Bhushan To: , , , , , , , , , CC: Bharat Bhushan , Bharat Bhushan Subject: [PATCH 2/7] iommu: add api to get iommu_domain of a device Date: Thu, 19 Sep 2013 12:59:18 +0530 Message-ID: <1379575763-2091-3-git-send-email-Bharat.Bhushan@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1379575763-2091-1-git-send-email-Bharat.Bhushan@freescale.com> References: <1379575763-2091-1-git-send-email-Bharat.Bhushan@freescale.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2594 Lines: 72 This api return the iommu domain to which the device is attached. The iommu_domain is required for making API calls related to iommu. Follow up patches which use this API to know iommu maping. Signed-off-by: Bharat Bhushan --- drivers/iommu/iommu.c | 10 ++++++++++ include/linux/iommu.h | 7 +++++++ 2 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index fbe9ca7..6ac5f50 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -696,6 +696,16 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) } EXPORT_SYMBOL_GPL(iommu_detach_device); +struct iommu_domain *iommu_get_dev_domain(struct device *dev) +{ + struct iommu_ops *ops = dev->bus->iommu_ops; + + if (unlikely(ops == NULL || ops->get_dev_iommu_domain == NULL)) + return NULL; + + return ops->get_dev_iommu_domain(dev); +} +EXPORT_SYMBOL_GPL(iommu_get_dev_domain); /* * IOMMU groups are really the natrual working unit of the IOMMU, but * the IOMMU API works on domains and devices. Bridge that gap by diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 7ea319e..fa046bd 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -127,6 +127,7 @@ struct iommu_ops { int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count); /* Get the numer of window per domain */ u32 (*domain_get_windows)(struct iommu_domain *domain); + struct iommu_domain *(*get_dev_iommu_domain)(struct device *dev); unsigned long pgsize_bitmap; }; @@ -190,6 +191,7 @@ extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, phys_addr_t offset, u64 size, int prot); extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr); +extern struct iommu_domain *iommu_get_dev_domain(struct device *dev); /** * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework * @domain: the iommu domain where the fault has happened @@ -284,6 +286,11 @@ static inline void iommu_domain_window_disable(struct iommu_domain *domain, { } +static inline struct iommu_domain *iommu_get_dev_domain(struct device *dev) +{ + return NULL; +} + static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) { return 0; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/