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 37 #ifndef UVERBS_H 38 #define UVERBS_H 39 40 #include <linux/kref.h> 41 #include <linux/idr.h> 42 #include <linux/mutex.h> 43 #include <linux/completion.h> 44 #include <linux/cdev.h> 45 46 #include <rdma/ib_verbs.h> 47 #include <rdma/ib_umem.h> 48 #include <rdma/ib_user_verbs.h> 49 50 /* 51 * Our lifetime rules for these structs are the following: 52 * 53 * struct ib_uverbs_device: One reference is held by the module and 54 * released in ib_uverbs_remove_one(). Another reference is taken by 55 * ib_uverbs_open() each time the character special file is opened, 56 * and released in ib_uverbs_release_file() when the file is released. 57 * 58 * struct ib_uverbs_file: One reference is held by the VFS and 59 * released when the file is closed. Another reference is taken when 60 * an asynchronous event queue file is created and released when the 61 * event file is closed. 62 * 63 * struct ib_uverbs_event_file: One reference is held by the VFS and 64 * released when the file is closed. For asynchronous event files, 65 * another reference is held by the corresponding main context file 66 * and released when that file is closed. For completion event files, 67 * a reference is taken when a CQ is created that uses the file, and 68 * released when the CQ is destroyed. 69 */ 70 71 struct ib_uverbs_device { 72 struct kref ref; 73 int num_comp_vectors; 74 struct completion comp; 75 struct device *dev; 76 struct ib_device *ib_dev; 77 int devnum; 78 struct cdev cdev; 79 struct rb_root xrcd_tree; 80 struct mutex xrcd_tree_mutex; 81 }; 82 83 struct ib_uverbs_event_file { 84 struct kref ref; 85 int is_async; 86 struct ib_uverbs_file *uverbs_file; 87 spinlock_t lock; 88 int is_closed; 89 wait_queue_head_t poll_wait; 90 struct fasync_struct *async_queue; 91 struct list_head event_list; 92 }; 93 94 struct ib_uverbs_file { 95 struct kref ref; 96 struct mutex mutex; 97 struct ib_uverbs_device *device; 98 struct ib_ucontext *ucontext; 99 struct ib_event_handler event_handler; 100 struct ib_uverbs_event_file *async_file; 101 }; 102 103 struct ib_uverbs_event { 104 union { 105 struct ib_uverbs_async_event_desc async; 106 struct ib_uverbs_comp_event_desc comp; 107 } desc; 108 struct list_head list; 109 struct list_head obj_list; 110 u32 *counter; 111 }; 112 113 struct ib_uverbs_mcast_entry { 114 struct list_head list; 115 union ib_gid gid; 116 u16 lid; 117 }; 118 119 struct ib_uevent_object { 120 struct ib_uobject uobject; 121 struct list_head event_list; 122 u32 events_reported; 123 }; 124 125 struct ib_uxrcd_object { 126 struct ib_uobject uobject; 127 atomic_t refcnt; 128 }; 129 130 struct ib_usrq_object { 131 struct ib_uevent_object uevent; 132 struct ib_uxrcd_object *uxrcd; 133 }; 134 135 struct ib_uqp_object { 136 struct ib_uevent_object uevent; 137 struct list_head mcast_list; 138 }; 139 140 struct ib_ucq_object { 141 struct ib_uobject uobject; 142 struct ib_uverbs_file *uverbs_file; 143 struct list_head comp_list; 144 struct list_head async_list; 145 u32 comp_events_reported; 146 u32 async_events_reported; 147 }; 148 149 extern spinlock_t ib_uverbs_idr_lock; 150 extern struct idr ib_uverbs_pd_idr; 151 extern struct idr ib_uverbs_mr_idr; 152 extern struct idr ib_uverbs_mw_idr; 153 extern struct idr ib_uverbs_ah_idr; 154 extern struct idr ib_uverbs_cq_idr; 155 extern struct idr ib_uverbs_qp_idr; 156 extern struct idr ib_uverbs_srq_idr; 157 extern struct idr ib_uverbs_xrcd_idr; 158 159 void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj); 160 161 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, 162 int is_async); 163 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd); 164 165 void ib_uverbs_release_ucq(struct ib_uverbs_file *file, 166 struct ib_uverbs_event_file *ev_file, 167 struct ib_ucq_object *uobj); 168 void ib_uverbs_release_uevent(struct ib_uverbs_file *file, 169 struct ib_uevent_object *uobj); 170 171 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context); 172 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr); 173 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr); 174 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr); 175 void ib_uverbs_event_handler(struct ib_event_handler *handler, 176 struct ib_event *event); 177 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd); 178 179 #define IB_UVERBS_DECLARE_CMD(name) \ 180 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \ 181 const char __user *buf, int in_len, \ 182 int out_len) 183 184 IB_UVERBS_DECLARE_CMD(get_context); 185 IB_UVERBS_DECLARE_CMD(query_device); 186 IB_UVERBS_DECLARE_CMD(query_port); 187 IB_UVERBS_DECLARE_CMD(alloc_pd); 188 IB_UVERBS_DECLARE_CMD(dealloc_pd); 189 IB_UVERBS_DECLARE_CMD(reg_mr); 190 IB_UVERBS_DECLARE_CMD(dereg_mr); 191 IB_UVERBS_DECLARE_CMD(create_comp_channel); 192 IB_UVERBS_DECLARE_CMD(create_cq); 193 IB_UVERBS_DECLARE_CMD(resize_cq); 194 IB_UVERBS_DECLARE_CMD(poll_cq); 195 IB_UVERBS_DECLARE_CMD(req_notify_cq); 196 IB_UVERBS_DECLARE_CMD(destroy_cq); 197 IB_UVERBS_DECLARE_CMD(create_qp); 198 IB_UVERBS_DECLARE_CMD(open_qp); 199 IB_UVERBS_DECLARE_CMD(query_qp); 200 IB_UVERBS_DECLARE_CMD(modify_qp); 201 IB_UVERBS_DECLARE_CMD(destroy_qp); 202 IB_UVERBS_DECLARE_CMD(post_send); 203 IB_UVERBS_DECLARE_CMD(post_recv); 204 IB_UVERBS_DECLARE_CMD(post_srq_recv); 205 IB_UVERBS_DECLARE_CMD(create_ah); 206 IB_UVERBS_DECLARE_CMD(destroy_ah); 207 IB_UVERBS_DECLARE_CMD(attach_mcast); 208 IB_UVERBS_DECLARE_CMD(detach_mcast); 209 IB_UVERBS_DECLARE_CMD(create_srq); 210 IB_UVERBS_DECLARE_CMD(modify_srq); 211 IB_UVERBS_DECLARE_CMD(query_srq); 212 IB_UVERBS_DECLARE_CMD(destroy_srq); 213 IB_UVERBS_DECLARE_CMD(create_xsrq); 214 IB_UVERBS_DECLARE_CMD(open_xrcd); 215 IB_UVERBS_DECLARE_CMD(close_xrcd); 216 217 #endif /* UVERBS_H */ 218