From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753096Ab2DBVPT (ORCPT ); Mon, 2 Apr 2012 17:15:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:8998 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752984Ab2DBVPI (ORCPT ); Mon, 2 Apr 2012 17:15:08 -0400 From: Alex Williamson Subject: [RFC PATCH 3/3] iommu: Create attach/detach group interface To: david@gibson.dropbear.id.au, dwmw2@infradead.org Cc: alex.williamson@redhat.com, iommu@lists.linux-foundation.org, qemu-devel@nongnu.org, joerg.roedel@amd.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 02 Apr 2012 15:14:55 -0600 Message-ID: <20120402211454.28977.32677.stgit@bling.home> In-Reply-To: <20120402203721.28977.95285.stgit@bling.home> References: <20120402203721.28977.95285.stgit@bling.home> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org IOMMU ops should be working at a group level rather than a device level as we cannot arbitrarily assign devices from the same group to different domains. For now this is just a simple wrapper that makes use of the dma_dev within a group. Signed-off-by: Alex Williamson --- drivers/iommu/iommu.c | 12 ++++++++++++ include/linux/iommu.h | 15 +++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6a51ed9..af77da1 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -327,6 +327,18 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) } EXPORT_SYMBOL_GPL(iommu_detach_device); +int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) +{ + return iommu_attach_device(domain, group->dma_dev); +} +EXPORT_SYMBOL_GPL(iommu_attach_group); + +void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group) +{ + iommu_detach_device(domain, group->dma_dev); +} +EXPORT_SYMBOL_GPL(iommu_detach_group); + phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 24004d6..d4e9a7a 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -107,6 +107,10 @@ extern int iommu_attach_device(struct iommu_domain *domain, struct device *dev); extern void iommu_detach_device(struct iommu_domain *domain, struct device *dev); +extern int iommu_attach_group(struct iommu_domain *domain, + struct iommu_group *group); +extern void iommu_detach_group(struct iommu_domain *domain, + struct iommu_group *group); extern int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot); extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, @@ -194,6 +198,17 @@ static inline void iommu_detach_device(struct iommu_domain *domain, { } +static inline int iommu_attach_group(struct iommu_domain *domain, + struct iommu_group *group) +{ + return -ENODEV; +} + +static inline void iommu_detach_group(struct iommu_domain *domain, + struct iommu_group *group) +{ +} + static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, int gfp_order, int prot) {