/* * Copyright (c) 2007 Cisco Systems. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef IB_UMEM_H #define IB_UMEM_H #include <linux/list.h> #include <linux/scatterlist.h> #include <linux/workqueue.h> struct ib_ucontext; struct ib_umem { struct ib_ucontext *context; size_t length; int offset; int page_size; int writable; int hugetlb; struct list_head chunk_list; struct work_struct work; struct mm_struct *mm; unsigned long diff; }; struct ib_umem_chunk { struct list_head list; int nents; int nmap; struct scatterlist page_list[0]; }; #ifdef CONFIG_INFINIBAND_USER_MEM struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, size_t size, int access); void ib_umem_release(struct ib_umem *umem); int ib_umem_page_count(struct ib_umem *umem); #else /* CONFIG_INFINIBAND_USER_MEM */ #include <linux/err.h> static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, size_t size, int access) { return ERR_PTR(-EINVAL); } static inline void ib_umem_release(struct ib_umem *umem) { } static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; } #endif /* CONFIG_INFINIBAND_USER_MEM */ #endif /* IB_UMEM_H */