1 /* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 6 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 7 * 8 * This software is available to you under a choice of one of two 9 * licenses. You may choose to be licensed under the terms of the GNU 10 * General Public License (GPL) Version 2, available from the file 11 * COPYING in the main directory of this source tree, or the 12 * OpenIB.org BSD license below: 13 * 14 * Redistribution and use in source and binary forms, with or 15 * without modification, are permitted provided that the following 16 * conditions are met: 17 * 18 * - Redistributions of source code must retain the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer. 21 * 22 * - Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials 25 * provided with the distribution. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34 * SOFTWARE. 35 * 36 * $Id: uverbs.h 2559 2005-06-06 19:43:16Z roland $ 37 */ 38 39 #ifndef UVERBS_H 40 #define UVERBS_H 41 42 #include <linux/kref.h> 43 #include <linux/idr.h> 44 #include <linux/mutex.h> 45 46 #include <rdma/ib_verbs.h> 47 #include <rdma/ib_user_verbs.h> 48 49 /* 50 * Our lifetime rules for these structs are the following: 51 * 52 * struct ib_uverbs_device: One reference is held by the module and 53 * released in ib_uverbs_remove_one(). Another reference is taken by 54 * ib_uverbs_open() each time the character special file is opened, 55 * and released in ib_uverbs_release_file() when the file is released. 56 * 57 * struct ib_uverbs_file: One reference is held by the VFS and 58 * released when the file is closed. Another reference is taken when 59 * an asynchronous event queue file is created and released when the 60 * event file is closed. 61 * 62 * struct ib_uverbs_event_file: One reference is held by the VFS and 63 * released when the file is closed. For asynchronous event files, 64 * another reference is held by the corresponding main context file 65 * and released when that file is closed. For completion event files, 66 * a reference is taken when a CQ is created that uses the file, and 67 * released when the CQ is destroyed. 68 */ 69 70 struct ib_uverbs_device { 71 struct kref ref; 72 int devnum; 73 struct cdev *dev; 74 struct class_device *class_dev; 75 struct ib_device *ib_dev; 76 int num_comp_vectors; 77 }; 78 79 struct ib_uverbs_event_file { 80 struct kref ref; 81 struct file *file; 82 struct ib_uverbs_file *uverbs_file; 83 spinlock_t lock; 84 int is_async; 85 wait_queue_head_t poll_wait; 86 struct fasync_struct *async_queue; 87 struct list_head event_list; 88 }; 89 90 struct ib_uverbs_file { 91 struct kref ref; 92 struct mutex mutex; 93 struct ib_uverbs_device *device; 94 struct ib_ucontext *ucontext; 95 struct ib_event_handler event_handler; 96 struct ib_uverbs_event_file *async_file; 97 }; 98 99 struct ib_uverbs_event { 100 union { 101 struct ib_uverbs_async_event_desc async; 102 struct ib_uverbs_comp_event_desc comp; 103 } desc; 104 struct list_head list; 105 struct list_head obj_list; 106 u32 *counter; 107 }; 108 109 struct ib_uverbs_mcast_entry { 110 struct list_head list; 111 union ib_gid gid; 112 u16 lid; 113 }; 114 115 struct ib_uevent_object { 116 struct ib_uobject uobject; 117 struct list_head event_list; 118 u32 events_reported; 119 }; 120 121 struct ib_uqp_object { 122 struct ib_uevent_object uevent; 123 struct list_head mcast_list; 124 }; 125 126 struct ib_ucq_object { 127 struct ib_uobject uobject; 128 struct ib_uverbs_file *uverbs_file; 129 struct list_head comp_list; 130 struct list_head async_list; 131 u32 comp_events_reported; 132 u32 async_events_reported; 133 }; 134 135 extern struct mutex ib_uverbs_idr_mutex; 136 extern struct idr ib_uverbs_pd_idr; 137 extern struct idr ib_uverbs_mr_idr; 138 extern struct idr ib_uverbs_mw_idr; 139 extern struct idr ib_uverbs_ah_idr; 140 extern struct idr ib_uverbs_cq_idr; 141 extern struct idr ib_uverbs_qp_idr; 142 extern struct idr ib_uverbs_srq_idr; 143 144 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, 145 int is_async, int *fd); 146 void ib_uverbs_release_event_file(struct kref *ref); 147 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd); 148 149 void ib_uverbs_release_ucq(struct ib_uverbs_file *file, 150 struct ib_uverbs_event_file *ev_file, 151 struct ib_ucq_object *uobj); 152 void ib_uverbs_release_uevent(struct ib_uverbs_file *file, 153 struct ib_uevent_object *uobj); 154 155 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context); 156 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr); 157 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr); 158 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr); 159 void ib_uverbs_event_handler(struct ib_event_handler *handler, 160 struct ib_event *event); 161 162 int ib_umem_get(struct ib_device *dev, struct ib_umem *mem, 163 void *addr, size_t size, int write); 164 void ib_umem_release(struct ib_device *dev, struct ib_umem *umem); 165 void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem); 166 167 #define IB_UVERBS_DECLARE_CMD(name) \ 168 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \ 169 const char __user *buf, int in_len, \ 170 int out_len) 171 172 IB_UVERBS_DECLARE_CMD(get_context); 173 IB_UVERBS_DECLARE_CMD(query_device); 174 IB_UVERBS_DECLARE_CMD(query_port); 175 IB_UVERBS_DECLARE_CMD(alloc_pd); 176 IB_UVERBS_DECLARE_CMD(dealloc_pd); 177 IB_UVERBS_DECLARE_CMD(reg_mr); 178 IB_UVERBS_DECLARE_CMD(dereg_mr); 179 IB_UVERBS_DECLARE_CMD(create_comp_channel); 180 IB_UVERBS_DECLARE_CMD(create_cq); 181 IB_UVERBS_DECLARE_CMD(resize_cq); 182 IB_UVERBS_DECLARE_CMD(poll_cq); 183 IB_UVERBS_DECLARE_CMD(req_notify_cq); 184 IB_UVERBS_DECLARE_CMD(destroy_cq); 185 IB_UVERBS_DECLARE_CMD(create_qp); 186 IB_UVERBS_DECLARE_CMD(query_qp); 187 IB_UVERBS_DECLARE_CMD(modify_qp); 188 IB_UVERBS_DECLARE_CMD(destroy_qp); 189 IB_UVERBS_DECLARE_CMD(post_send); 190 IB_UVERBS_DECLARE_CMD(post_recv); 191 IB_UVERBS_DECLARE_CMD(post_srq_recv); 192 IB_UVERBS_DECLARE_CMD(create_ah); 193 IB_UVERBS_DECLARE_CMD(destroy_ah); 194 IB_UVERBS_DECLARE_CMD(attach_mcast); 195 IB_UVERBS_DECLARE_CMD(detach_mcast); 196 IB_UVERBS_DECLARE_CMD(create_srq); 197 IB_UVERBS_DECLARE_CMD(modify_srq); 198 IB_UVERBS_DECLARE_CMD(query_srq); 199 IB_UVERBS_DECLARE_CMD(destroy_srq); 200 201 #endif /* UVERBS_H */ 202