1 /* 2 * Copyright (c) 2007 Cisco Systems. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #ifndef IB_UMEM_H 34 #define IB_UMEM_H 35 36 #include <linux/list.h> 37 #include <linux/scatterlist.h> 38 #include <linux/workqueue.h> 39 #include <linux/dma-attrs.h> 40 #include <linux/completion.h> 41 #include <rdma/ib_peer_mem.h> 42 43 struct ib_ucontext; 44 struct ib_umem; 45 46 typedef void (*umem_invalidate_func_t)(void *invalidation_cookie, 47 struct ib_umem *umem, 48 unsigned long addr, size_t size); 49 50 struct invalidation_ctx { 51 struct ib_umem *umem; 52 umem_invalidate_func_t func; 53 void *cookie; 54 unsigned long context_ticket; 55 int peer_callback; 56 int inflight_invalidation; 57 int peer_invalidated; 58 struct completion comp; 59 }; 60 61 struct ib_umem { 62 struct ib_ucontext *context; 63 size_t length; 64 int offset; 65 int page_size; 66 int writable; 67 int hugetlb; 68 struct work_struct work; 69 unsigned long diff; 70 unsigned long start; 71 struct sg_table sg_head; 72 int nmap; 73 int npages; 74 /* peer memory that manages this umem*/ 75 struct ib_peer_memory_client *ib_peer_mem; 76 struct invalidation_ctx *invalidation_ctx; 77 int peer_mem_srcu_key; 78 /* peer memory private context */ 79 void *peer_mem_client_context; 80 }; 81 82 struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, 83 size_t size, int access, int dmasync); 84 struct ib_umem *ib_umem_get_ex(struct ib_ucontext *context, unsigned long addr, 85 size_t size, int access, int dmasync, 86 int invalidation_supported); 87 void ib_umem_activate_invalidation_notifier(struct ib_umem *umem, 88 umem_invalidate_func_t func, 89 void *cookie); 90 void ib_umem_release(struct ib_umem *umem); 91 int ib_umem_page_count(struct ib_umem *umem); 92 93 #endif /* IB_UMEM_H */ 94