drivers/infiniband/core/uverbs.h

   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 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  51         do {                                                            \
  52                 (udata)->inbuf  = (const void __user *) (ibuf);         \
  53                 (udata)->outbuf = (void __user *) (obuf);               \
  54                 (udata)->inlen  = (ilen);                               \
  55                 (udata)->outlen = (olen);                               \
  56         } while (0)
  57
  58 #define INIT_UDATA_BUF_OR_NULL(udata, ibuf, obuf, ilen, olen)                   \
  59         do {                                                                    \
  60                 (udata)->inbuf  = (ilen) ? (const void __user *) (ibuf) : NULL; \
  61                 (udata)->outbuf = (olen) ? (void __user *) (obuf) : NULL;       \
  62                 (udata)->inlen  = (ilen);                                       \
  63                 (udata)->outlen = (olen);                                       \
  64         } while (0)
  65
  66 /*
  67  * Our lifetime rules for these structs are the following:
  68  *
  69  * struct ib_uverbs_device: One reference is held by the module and
  70  * released in ib_uverbs_remove_one().  Another reference is taken by
  71  * ib_uverbs_open() each time the character special file is opened,
  72  * and released in ib_uverbs_release_file() when the file is released.
  73  *
  74  * struct ib_uverbs_file: One reference is held by the VFS and
  75  * released when the file is closed.  Another reference is taken when
  76  * an asynchronous event queue file is created and released when the
  77  * event file is closed.
  78  *
  79  * struct ib_uverbs_event_file: One reference is held by the VFS and
  80  * released when the file is closed.  For asynchronous event files,
  81  * another reference is held by the corresponding main context file
  82  * and released when that file is closed.  For completion event files,
  83  * a reference is taken when a CQ is created that uses the file, and
  84  * released when the CQ is destroyed.
  85  */
  86
  87 struct ib_uverbs_device {
  88         atomic_t                                refcount;
  89         int                                     num_comp_vectors;
  90         struct completion                       comp;
  91         struct device                          *dev;
  92         struct ib_device        __rcu          *ib_dev;
  93         int                                     devnum;
  94         struct cdev                             cdev;
  95         struct rb_root                          xrcd_tree;
  96         struct mutex                            xrcd_tree_mutex;
  97         struct kobject                          kobj;
  98         struct srcu_struct                      disassociate_srcu;
  99         struct mutex                            lists_mutex; /* protect lists */
 100         struct list_head                        uverbs_file_list;
 101         struct list_head                        uverbs_events_file_list;
 102 };
 103
 104 struct ib_uverbs_event_file {
 105         struct kref                             ref;
 106         int                                     is_async;
 107         struct ib_uverbs_file                  *uverbs_file;
 108         spinlock_t                              lock;
 109         int                                     is_closed;
 110         wait_queue_head_t                       poll_wait;
 111         struct fasync_struct                   *async_queue;
 112         struct list_head                        event_list;
 113         struct list_head                        list;
 114 };
 115
 116 struct ib_uverbs_file {
 117         struct kref                             ref;
 118         struct mutex                            mutex;
 119         struct ib_uverbs_device                *device;
 120         struct ib_ucontext                     *ucontext;
 121         struct ib_event_handler                 event_handler;
 122         struct ib_uverbs_event_file            *async_file;
 123         struct list_head                        list;
 124         int                                     is_closed;
 125 };
 126
 127 struct ib_uverbs_event {
 128         union {
 129                 struct ib_uverbs_async_event_desc       async;
 130                 struct ib_uverbs_comp_event_desc        comp;
 131         }                                       desc;
 132         struct list_head                        list;
 133         struct list_head                        obj_list;
 134         u32                                    *counter;
 135 };
 136
 137 struct ib_uverbs_mcast_entry {
 138         struct list_head        list;
 139         union ib_gid            gid;
 140         u16                     lid;
 141 };
 142
 143 struct ib_uevent_object {
 144         struct ib_uobject       uobject;
 145         struct list_head        event_list;
 146         u32                     events_reported;
 147 };
 148
 149 struct ib_uxrcd_object {
 150         struct ib_uobject       uobject;
 151         atomic_t                refcnt;
 152 };
 153
 154 struct ib_usrq_object {
 155         struct ib_uevent_object uevent;
 156         struct ib_uxrcd_object *uxrcd;
 157 };
 158
 159 struct ib_uqp_object {
 160         struct ib_uevent_object uevent;
 161         struct list_head        mcast_list;
 162         struct ib_uxrcd_object *uxrcd;
 163 };
 164
 165 struct ib_ucq_object {
 166         struct ib_uobject       uobject;
 167         struct ib_uverbs_file  *uverbs_file;
 168         struct list_head        comp_list;
 169         struct list_head        async_list;
 170         u32                     comp_events_reported;
 171         u32                     async_events_reported;
 172 };
 173
 174 extern spinlock_t ib_uverbs_idr_lock;
 175 extern struct idr ib_uverbs_pd_idr;
 176 extern struct idr ib_uverbs_mr_idr;
 177 extern struct idr ib_uverbs_mw_idr;
 178 extern struct idr ib_uverbs_ah_idr;
 179 extern struct idr ib_uverbs_cq_idr;
 180 extern struct idr ib_uverbs_qp_idr;
 181 extern struct idr ib_uverbs_srq_idr;
 182 extern struct idr ib_uverbs_xrcd_idr;
 183 extern struct idr ib_uverbs_rule_idr;
 184
 185 void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj);
 186
 187 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
 188                                         struct ib_device *ib_dev,
 189                                         int is_async);
 190 void ib_uverbs_free_async_event_file(struct ib_uverbs_file *uverbs_file);
 191 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
 192
 193 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
 194                            struct ib_uverbs_event_file *ev_file,
 195                            struct ib_ucq_object *uobj);
 196 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
 197                               struct ib_uevent_object *uobj);
 198
 199 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
 200 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
 201 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
 202 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
 203 void ib_uverbs_event_handler(struct ib_event_handler *handler,
 204                              struct ib_event *event);
 205 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd);
 206
 207 int uverbs_dealloc_mw(struct ib_mw *mw);
 208
 209 struct ib_uverbs_flow_spec {
 210         union {
 211                 union {
 212                         struct ib_uverbs_flow_spec_hdr hdr;
 213                         struct {
 214                                 __u32 type;
 215                                 __u16 size;
 216                                 __u16 reserved;
 217                         };
 218                 };
 219                 struct ib_uverbs_flow_spec_eth     eth;
 220                 struct ib_uverbs_flow_spec_ipv4    ipv4;
 221                 struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
 222         };
 223 };
 224
 225 #define IB_UVERBS_DECLARE_CMD(name)                                     \
 226         ssize_t ib_uverbs_##name(struct ib_uverbs_file *file,           \
 227                                  struct ib_device *ib_dev,              \
 228                                  const char __user *buf, int in_len,    \
 229                                  int out_len)
 230
 231 IB_UVERBS_DECLARE_CMD(get_context);
 232 IB_UVERBS_DECLARE_CMD(query_device);
 233 IB_UVERBS_DECLARE_CMD(query_port);
 234 IB_UVERBS_DECLARE_CMD(alloc_pd);
 235 IB_UVERBS_DECLARE_CMD(dealloc_pd);
 236 IB_UVERBS_DECLARE_CMD(reg_mr);
 237 IB_UVERBS_DECLARE_CMD(rereg_mr);
 238 IB_UVERBS_DECLARE_CMD(dereg_mr);
 239 IB_UVERBS_DECLARE_CMD(alloc_mw);
 240 IB_UVERBS_DECLARE_CMD(dealloc_mw);
 241 IB_UVERBS_DECLARE_CMD(create_comp_channel);
 242 IB_UVERBS_DECLARE_CMD(create_cq);
 243 IB_UVERBS_DECLARE_CMD(resize_cq);
 244 IB_UVERBS_DECLARE_CMD(poll_cq);
 245 IB_UVERBS_DECLARE_CMD(req_notify_cq);
 246 IB_UVERBS_DECLARE_CMD(destroy_cq);
 247 IB_UVERBS_DECLARE_CMD(create_qp);
 248 IB_UVERBS_DECLARE_CMD(open_qp);
 249 IB_UVERBS_DECLARE_CMD(query_qp);
 250 IB_UVERBS_DECLARE_CMD(modify_qp);
 251 IB_UVERBS_DECLARE_CMD(destroy_qp);
 252 IB_UVERBS_DECLARE_CMD(post_send);
 253 IB_UVERBS_DECLARE_CMD(post_recv);
 254 IB_UVERBS_DECLARE_CMD(post_srq_recv);
 255 IB_UVERBS_DECLARE_CMD(create_ah);
 256 IB_UVERBS_DECLARE_CMD(destroy_ah);
 257 IB_UVERBS_DECLARE_CMD(attach_mcast);
 258 IB_UVERBS_DECLARE_CMD(detach_mcast);
 259 IB_UVERBS_DECLARE_CMD(create_srq);
 260 IB_UVERBS_DECLARE_CMD(modify_srq);
 261 IB_UVERBS_DECLARE_CMD(query_srq);
 262 IB_UVERBS_DECLARE_CMD(destroy_srq);
 263 IB_UVERBS_DECLARE_CMD(create_xsrq);
 264 IB_UVERBS_DECLARE_CMD(open_xrcd);
 265 IB_UVERBS_DECLARE_CMD(close_xrcd);
 266
 267 #define IB_UVERBS_DECLARE_EX_CMD(name)                          \
 268         int ib_uverbs_ex_##name(struct ib_uverbs_file *file,    \
 269                                 struct ib_device *ib_dev,               \
 270                                 struct ib_udata *ucore,         \
 271                                 struct ib_udata *uhw)
 272
 273 IB_UVERBS_DECLARE_EX_CMD(create_flow);
 274 IB_UVERBS_DECLARE_EX_CMD(destroy_flow);
 275 IB_UVERBS_DECLARE_EX_CMD(query_device);
 276 IB_UVERBS_DECLARE_EX_CMD(create_cq);
 277 IB_UVERBS_DECLARE_EX_CMD(create_qp);
 278
 279 #endif /* UVERBS_H */