diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/iommu.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/iommu.h | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/ANDROID_3.4.5/include/linux/iommu.h b/ANDROID_3.4.5/include/linux/iommu.h deleted file mode 100644 index d9375804..00000000 --- a/ANDROID_3.4.5/include/linux/iommu.h +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. - * Author: Joerg Roedel <joerg.roedel@amd.com> - * - * 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 - -#include <linux/errno.h> - -#define IOMMU_READ (1) -#define IOMMU_WRITE (2) -#define IOMMU_CACHE (4) /* DMA cache coherency */ - -struct iommu_ops; -struct bus_type; -struct device; -struct iommu_domain; - -/* iommu fault flags */ -#define IOMMU_FAULT_READ 0x0 -#define IOMMU_FAULT_WRITE 0x1 - -typedef int (*iommu_fault_handler_t)(struct iommu_domain *, - struct device *, unsigned long, int); - -struct iommu_domain { - struct iommu_ops *ops; - void *priv; - iommu_fault_handler_t handler; -}; - -#define IOMMU_CAP_CACHE_COHERENCY 0x1 -#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ - -#ifdef CONFIG_IOMMU_API - -/** - * struct iommu_ops - iommu ops and capabilities - * @domain_init: init iommu domain - * @domain_destroy: destroy iommu domain - * @attach_dev: attach device to an iommu domain - * @detach_dev: detach device from an iommu domain - * @map: map a physically contiguous memory region to an iommu domain - * @unmap: unmap a physically contiguous memory region from an iommu domain - * @iova_to_phys: translate iova to physical address - * @domain_has_cap: domain capabilities query - * @commit: commit iommu domain - * @pgsize_bitmap: bitmap of supported page sizes - */ -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); - size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, - size_t size); - phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, - unsigned long iova); - int (*domain_has_cap)(struct iommu_domain *domain, - unsigned long cap); - int (*device_group)(struct device *dev, unsigned int *groupid); - unsigned long pgsize_bitmap; -}; - -extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops); -extern bool iommu_present(struct bus_type *bus); -extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); -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(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, - size_t size); -extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova); -extern int iommu_domain_has_cap(struct iommu_domain *domain, - unsigned long cap); -extern void iommu_set_fault_handler(struct iommu_domain *domain, - iommu_fault_handler_t handler); -extern int iommu_device_group(struct device *dev, unsigned int *groupid); - -/** - * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework - * @domain: the iommu domain where the fault has happened - * @dev: the device where the fault has happened - * @iova: the faulting address - * @flags: mmu fault flags (e.g. IOMMU_FAULT_READ/IOMMU_FAULT_WRITE/...) - * - * This function should be called by the low-level IOMMU implementations - * whenever IOMMU faults happen, to allow high-level users, that are - * interested in such events, to know about them. - * - * This event may be useful for several possible use cases: - * - mere logging of the event - * - dynamic TLB/PTE loading - * - if restarting of the faulting device is required - * - * Returns 0 on success and an appropriate error code otherwise (if dynamic - * PTE/TLB loading will one day be supported, implementations will be able - * to tell whether it succeeded or not according to this return value). - * - * Specifically, -ENOSYS is returned if a fault handler isn't installed - * (though fault handlers can also return -ENOSYS, in case they want to - * elicit the default behavior of the IOMMU drivers). - */ -static inline int report_iommu_fault(struct iommu_domain *domain, - struct device *dev, unsigned long iova, int flags) -{ - int ret = -ENOSYS; - - /* - * if upper layers showed interest and installed a fault handler, - * invoke it. - */ - if (domain->handler) - ret = domain->handler(domain, dev, iova, flags); - - return ret; -} - -#else /* CONFIG_IOMMU_API */ - -struct iommu_ops {}; - -static inline bool iommu_present(struct bus_type *bus) -{ - return false; -} - -static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) -{ - 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(struct iommu_domain *domain, unsigned long iova, - phys_addr_t paddr, int gfp_order, int prot) -{ - return -ENODEV; -} - -static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, - int gfp_order) -{ - return -ENODEV; -} - -static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) -{ - return 0; -} - -static inline int domain_has_cap(struct iommu_domain *domain, - unsigned long cap) -{ - return 0; -} - -static inline void iommu_set_fault_handler(struct iommu_domain *domain, - iommu_fault_handler_t handler) -{ -} - -static inline int iommu_device_group(struct device *dev, unsigned int *groupid) -{ - return -ENODEV; -} - -#endif /* CONFIG_IOMMU_API */ - -#endif /* __LINUX_IOMMU_H */ |