From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: [RFC PATCH 3/3] iommu: Create attach/detach group interface Date: Mon, 02 Apr 2012 15:14:55 -0600 Message-ID: <20120402211454.28977.32677.stgit@bling.home> References: <20120402203721.28977.95285.stgit@bling.home> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120402203721.28977.95285.stgit-xdHQ/5r00wBBDLzU/O5InQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org Cc: kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org List-Id: iommu@lists.linux-foundation.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) {