Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754222AbYLIORu (ORCPT ); Tue, 9 Dec 2008 09:17:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753318AbYLIOQ0 (ORCPT ); Tue, 9 Dec 2008 09:16:26 -0500 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:51886 "EHLO SG2EHSOBE004.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752738AbYLIOQV (ORCPT ); Tue, 9 Dec 2008 09:16:21 -0500 X-BigFish: VPS-4(zz18c1K655Oc8kzzzzz32i43j67h) X-Spam-TCS-SCL: 6:0 X-WSS-ID: 0KBM4YX-03-KK8-01 From: Joerg Roedel To: avi@redhat.com, mingo@redhat.com, dwmw2@infradead.org, gregkh@suse.de, weidong.han@intel.com CC: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Joerg Roedel Subject: [PATCH 02/11] introcude linux/iommu.h for an iommu api Date: Tue, 9 Dec 2008 15:16:01 +0100 Message-ID: <1228832170-13405-3-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.6.4 In-Reply-To: <1228832170-13405-2-git-send-email-joerg.roedel@amd.com> References: <20081209141143.GW12816@amd.com> <1228832170-13405-1-git-send-email-joerg.roedel@amd.com> <1228832170-13405-2-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 09 Dec 2008 14:16:10.0739 (UTC) FILETIME=[AF7FB430:01C95A08] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4090 Lines: 137 This patch introduces the API to abstract the exported VT-d functions for KVM into a generic API. This way the AMD IOMMU implementation can plug into this API later. Signed-off-by: Joerg Roedel --- include/linux/iommu.h | 112 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 112 insertions(+), 0 deletions(-) create mode 100644 include/linux/iommu.h diff --git a/include/linux/iommu.h b/include/linux/iommu.h new file mode 100644 index 0000000..8a7bfb1 --- /dev/null +++ b/include/linux/iommu.h @@ -0,0 +1,112 @@ +/* + * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. + * Author: Joerg Roedel + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_IOMMU_H +#define __LINUX_IOMMU_H + +#define IOMMU_READ (1) +#define IOMMU_WRITE (2) + +struct device; + +struct iommu_domain { + void *priv; +}; + +struct iommu_ops { + int (*domain_init)(struct iommu_domain *domain); + void (*domain_destroy)(struct iommu_domain *domain); + int (*attach_dev)(struct iommu_domain *domain, struct device *dev); + void (*detach_dev)(struct iommu_domain *domain, struct device *dev); + int (*map)(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot); + void (*unmap)(struct iommu_domain *domain, unsigned long iova, + size_t size); + phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, + unsigned long iova); +}; + +#ifdef CONFIG_IOMMU_API + +extern void register_iommu(struct iommu_ops *ops); +extern bool iommu_found(void); +extern struct iommu_domain *iommu_domain_alloc(void); +extern void iommu_domain_free(struct iommu_domain *domain); +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_map_range(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot); +extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, + size_t size); +extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, + unsigned long iova); + +#else /* CONFIG_IOMMU_API */ + +static inline void register_iommu(struct iommu_ops *ops) +{ +} + +static inline bool iommu_found(void) +{ + return false; +} + +static inline struct iommu_domain *iommu_domain_alloc(void) +{ + return NULL; +} + +static inline void iommu_domain_free(struct iommu_domain *domain) +{ +} + +static inline int iommu_attach_device(struct iommu_domain *domain, + struct device *dev) +{ + return -ENODEV; +} + +static inline void iommu_detach_device(struct iommu_domain *domain, + struct device *dev) +{ +} + +static inline int iommu_map_range(struct iommu_domain *domain, + unsigned long iova, phys_addr_t paddr, + size_t size, int prot) +{ + return -ENODEV; +} + +static inline void iommu_unmap_range(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ +} + +static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, + unsigned long iova) +{ + return 0; +} + +#endif /* CONFIG_IOMMU_API */ + +#endif /* __LINUX_IOMMU_H */ -- 1.5.6.4 -- 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/