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