1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 6 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 7 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 8 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 9 * 10 * This software is available to you under a choice of one of two 11 * licenses. You may choose to be licensed under the terms of the GNU 12 * General Public License (GPL) Version 2, available from the file 13 * COPYING in the main directory of this source tree, or the 14 * OpenIB.org BSD license below: 15 * 16 * Redistribution and use in source and binary forms, with or 17 * without modification, are permitted provided that the following 18 * conditions are met: 19 * 20 * - Redistributions of source code must retain the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer. 23 * 24 * - Redistributions in binary form must reproduce the above 25 * copyright notice, this list of conditions and the following 26 * disclaimer in the documentation and/or other materials 27 * provided with the distribution. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 36 * SOFTWARE. 37 * 38 * $FreeBSD$ 39 */ 40 41 #ifndef UVERBS_H 42 #define UVERBS_H 43 44 #include <linux/kref.h> 45 #include <linux/idr.h> 46 #include <linux/mutex.h> 47 #include <linux/completion.h> 48 #include <linux/cdev.h> 49 #include <linux/srcu.h> 50 #include <linux/rcupdate.h> 51 #include <linux/rbtree.h> 52 53 #include <rdma/ib_verbs.h> 54 #include <rdma/ib_umem.h> 55 #include <rdma/ib_user_verbs.h> 56 57 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \ 58 do { \ 59 (udata)->inbuf = (const void __user *) (ibuf); \ 60 (udata)->outbuf = (void __user *) (obuf); \ 61 (udata)->inlen = (ilen); \ 62 (udata)->outlen = (olen); \ 63 } while (0) 64 65 #define INIT_UDATA_BUF_OR_NULL(udata, ibuf, obuf, ilen, olen) \ 66 do { \ 67 (udata)->inbuf = (ilen) ? (const void __user *) (ibuf) : NULL; \ 68 (udata)->outbuf = (olen) ? (void __user *) (obuf) : NULL; \ 69 (udata)->inlen = (ilen); \ 70 (udata)->outlen = (olen); \ 71 } while (0) 72 73 /* 74 * Our lifetime rules for these structs are the following: 75 * 76 * struct ib_uverbs_device: One reference is held by the module and 77 * released in ib_uverbs_remove_one(). Another reference is taken by 78 * ib_uverbs_open() each time the character special file is opened, 79 * and released in ib_uverbs_release_file() when the file is released. 80 * 81 * struct ib_uverbs_file: One reference is held by the VFS and 82 * released when the file is closed. Another reference is taken when 83 * an asynchronous event queue file is created and released when the 84 * event file is closed. 85 * 86 * struct ib_uverbs_event_file: One reference is held by the VFS and 87 * released when the file is closed. For asynchronous event files, 88 * another reference is held by the corresponding main context file 89 * and released when that file is closed. For completion event files, 90 * a reference is taken when a CQ is created that uses the file, and 91 * released when the CQ is destroyed. 92 */ 93 94 struct ib_uverbs_device { 95 atomic_t refcount; 96 int num_comp_vectors; 97 struct completion comp; 98 struct device *dev; 99 struct ib_device __rcu *ib_dev; 100 int devnum; 101 struct cdev cdev; 102 struct rb_root xrcd_tree; 103 struct mutex xrcd_tree_mutex; 104 struct kobject kobj; 105 struct srcu_struct disassociate_srcu; 106 struct mutex lists_mutex; /* protect lists */ 107 struct list_head uverbs_file_list; 108 struct list_head uverbs_events_file_list; 109 }; 110 111 struct ib_uverbs_event_file { 112 struct kref ref; 113 int is_async; 114 struct ib_uverbs_file *uverbs_file; 115 spinlock_t lock; 116 int is_closed; 117 wait_queue_head_t poll_wait; 118 struct fasync_struct *async_queue; 119 struct list_head event_list; 120 struct list_head list; 121 }; 122 123 struct ib_uverbs_file { 124 struct kref ref; 125 struct mutex mutex; 126 struct mutex cleanup_mutex; /* protect cleanup */ 127 struct ib_uverbs_device *device; 128 struct ib_ucontext *ucontext; 129 struct ib_event_handler event_handler; 130 struct ib_uverbs_event_file *async_file; 131 struct list_head list; 132 int is_closed; 133 }; 134 135 struct ib_uverbs_event { 136 union { 137 struct ib_uverbs_async_event_desc async; 138 struct ib_uverbs_comp_event_desc comp; 139 } desc; 140 struct list_head list; 141 struct list_head obj_list; 142 u32 *counter; 143 }; 144 145 struct ib_uverbs_mcast_entry { 146 struct list_head list; 147 union ib_gid gid; 148 u16 lid; 149 }; 150 151 struct ib_uevent_object { 152 struct ib_uobject uobject; 153 struct list_head event_list; 154 u32 events_reported; 155 }; 156 157 struct ib_uxrcd_object { 158 struct ib_uobject uobject; 159 atomic_t refcnt; 160 }; 161 162 struct ib_usrq_object { 163 struct ib_uevent_object uevent; 164 struct ib_uxrcd_object *uxrcd; 165 }; 166 167 struct ib_uqp_object { 168 struct ib_uevent_object uevent; 169 struct list_head mcast_list; 170 struct ib_uxrcd_object *uxrcd; 171 }; 172 173 struct ib_uwq_object { 174 struct ib_uevent_object uevent; 175 }; 176 177 struct ib_ucq_object { 178 struct ib_uobject uobject; 179 struct ib_uverbs_file *uverbs_file; 180 struct list_head comp_list; 181 struct list_head async_list; 182 u32 comp_events_reported; 183 u32 async_events_reported; 184 }; 185 186 extern spinlock_t ib_uverbs_idr_lock; 187 extern struct idr ib_uverbs_pd_idr; 188 extern struct idr ib_uverbs_mr_idr; 189 extern struct idr ib_uverbs_mw_idr; 190 extern struct idr ib_uverbs_ah_idr; 191 extern struct idr ib_uverbs_cq_idr; 192 extern struct idr ib_uverbs_qp_idr; 193 extern struct idr ib_uverbs_srq_idr; 194 extern struct idr ib_uverbs_xrcd_idr; 195 extern struct idr ib_uverbs_rule_idr; 196 extern struct idr ib_uverbs_wq_idr; 197 extern struct idr ib_uverbs_rwq_ind_tbl_idr; 198 199 void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj); 200 201 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, 202 struct ib_device *ib_dev, 203 int is_async); 204 void ib_uverbs_free_async_event_file(struct ib_uverbs_file *uverbs_file); 205 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd); 206 207 void ib_uverbs_release_ucq(struct ib_uverbs_file *file, 208 struct ib_uverbs_event_file *ev_file, 209 struct ib_ucq_object *uobj); 210 void ib_uverbs_release_uevent(struct ib_uverbs_file *file, 211 struct ib_uevent_object *uobj); 212 213 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context); 214 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr); 215 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr); 216 void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr); 217 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr); 218 void ib_uverbs_event_handler(struct ib_event_handler *handler, 219 struct ib_event *event); 220 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd); 221 222 int uverbs_dealloc_mw(struct ib_mw *mw); 223 224 struct ib_uverbs_flow_spec { 225 union { 226 union { 227 struct ib_uverbs_flow_spec_hdr hdr; 228 struct { 229 __u32 type; 230 __u16 size; 231 __u16 reserved; 232 }; 233 }; 234 struct ib_uverbs_flow_spec_eth eth; 235 struct ib_uverbs_flow_spec_ipv4 ipv4; 236 struct ib_uverbs_flow_spec_tcp_udp tcp_udp; 237 struct ib_uverbs_flow_spec_ipv6 ipv6; 238 }; 239 }; 240 241 #define IB_UVERBS_DECLARE_CMD(name) \ 242 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \ 243 struct ib_device *ib_dev, \ 244 const char __user *buf, int in_len, \ 245 int out_len) 246 247 IB_UVERBS_DECLARE_CMD(get_context); 248 IB_UVERBS_DECLARE_CMD(query_device); 249 IB_UVERBS_DECLARE_CMD(query_port); 250 IB_UVERBS_DECLARE_CMD(alloc_pd); 251 IB_UVERBS_DECLARE_CMD(dealloc_pd); 252 IB_UVERBS_DECLARE_CMD(reg_mr); 253 IB_UVERBS_DECLARE_CMD(rereg_mr); 254 IB_UVERBS_DECLARE_CMD(dereg_mr); 255 IB_UVERBS_DECLARE_CMD(alloc_mw); 256 IB_UVERBS_DECLARE_CMD(dealloc_mw); 257 IB_UVERBS_DECLARE_CMD(create_comp_channel); 258 IB_UVERBS_DECLARE_CMD(create_cq); 259 IB_UVERBS_DECLARE_CMD(resize_cq); 260 IB_UVERBS_DECLARE_CMD(poll_cq); 261 IB_UVERBS_DECLARE_CMD(req_notify_cq); 262 IB_UVERBS_DECLARE_CMD(destroy_cq); 263 IB_UVERBS_DECLARE_CMD(create_qp); 264 IB_UVERBS_DECLARE_CMD(open_qp); 265 IB_UVERBS_DECLARE_CMD(query_qp); 266 IB_UVERBS_DECLARE_CMD(modify_qp); 267 IB_UVERBS_DECLARE_CMD(destroy_qp); 268 IB_UVERBS_DECLARE_CMD(post_send); 269 IB_UVERBS_DECLARE_CMD(post_recv); 270 IB_UVERBS_DECLARE_CMD(post_srq_recv); 271 IB_UVERBS_DECLARE_CMD(create_ah); 272 IB_UVERBS_DECLARE_CMD(destroy_ah); 273 IB_UVERBS_DECLARE_CMD(attach_mcast); 274 IB_UVERBS_DECLARE_CMD(detach_mcast); 275 IB_UVERBS_DECLARE_CMD(create_srq); 276 IB_UVERBS_DECLARE_CMD(modify_srq); 277 IB_UVERBS_DECLARE_CMD(query_srq); 278 IB_UVERBS_DECLARE_CMD(destroy_srq); 279 IB_UVERBS_DECLARE_CMD(create_xsrq); 280 IB_UVERBS_DECLARE_CMD(open_xrcd); 281 IB_UVERBS_DECLARE_CMD(close_xrcd); 282 283 #define IB_UVERBS_DECLARE_EX_CMD(name) \ 284 int ib_uverbs_ex_##name(struct ib_uverbs_file *file, \ 285 struct ib_device *ib_dev, \ 286 struct ib_udata *ucore, \ 287 struct ib_udata *uhw) 288 289 IB_UVERBS_DECLARE_EX_CMD(create_flow); 290 IB_UVERBS_DECLARE_EX_CMD(destroy_flow); 291 IB_UVERBS_DECLARE_EX_CMD(query_device); 292 IB_UVERBS_DECLARE_EX_CMD(create_cq); 293 IB_UVERBS_DECLARE_EX_CMD(create_qp); 294 IB_UVERBS_DECLARE_EX_CMD(create_wq); 295 IB_UVERBS_DECLARE_EX_CMD(modify_wq); 296 IB_UVERBS_DECLARE_EX_CMD(destroy_wq); 297 IB_UVERBS_DECLARE_EX_CMD(create_rwq_ind_table); 298 IB_UVERBS_DECLARE_EX_CMD(destroy_rwq_ind_table); 299 300 #endif /* UVERBS_H */ 301