Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1 | /* |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 2 | * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
| 4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. |
| 5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| 6 | * |
| 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
| 16 | * |
| 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
| 20 | * |
| 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
| 34 | * |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 35 | * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 36 | */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 37 | |
| 38 | #include <linux/completion.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 39 | #include <linux/dma-mapping.h> |
| 40 | #include <linux/err.h> |
| 41 | #include <linux/idr.h> |
| 42 | #include <linux/interrupt.h> |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 43 | #include <linux/random.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 44 | #include <linux/rbtree.h> |
| 45 | #include <linux/spinlock.h> |
| 46 | #include <linux/workqueue.h> |
| 47 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 48 | #include <rdma/ib_cache.h> |
| 49 | #include <rdma/ib_cm.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 50 | #include "cm_msgs.h" |
| 51 | |
| 52 | MODULE_AUTHOR("Sean Hefty"); |
| 53 | MODULE_DESCRIPTION("InfiniBand CM"); |
| 54 | MODULE_LICENSE("Dual BSD/GPL"); |
| 55 | |
| 56 | static void cm_add_one(struct ib_device *device); |
| 57 | static void cm_remove_one(struct ib_device *device); |
| 58 | |
| 59 | static struct ib_client cm_client = { |
| 60 | .name = "cm", |
| 61 | .add = cm_add_one, |
| 62 | .remove = cm_remove_one |
| 63 | }; |
| 64 | |
| 65 | static struct ib_cm { |
| 66 | spinlock_t lock; |
| 67 | struct list_head device_list; |
| 68 | rwlock_t device_lock; |
| 69 | struct rb_root listen_service_table; |
| 70 | u64 listen_service_id; |
| 71 | /* struct rb_root peer_service_table; todo: fix peer to peer */ |
| 72 | struct rb_root remote_qp_table; |
| 73 | struct rb_root remote_id_table; |
| 74 | struct rb_root remote_sidr_table; |
| 75 | struct idr local_id_table; |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 76 | __be32 random_id_operand; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 77 | struct list_head timewait_list; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 78 | struct workqueue_struct *wq; |
| 79 | } cm; |
| 80 | |
| 81 | struct cm_port { |
| 82 | struct cm_device *cm_dev; |
| 83 | struct ib_mad_agent *mad_agent; |
| 84 | u8 port_num; |
| 85 | }; |
| 86 | |
| 87 | struct cm_device { |
| 88 | struct list_head list; |
| 89 | struct ib_device *device; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 90 | struct cm_port port[0]; |
| 91 | }; |
| 92 | |
| 93 | struct cm_av { |
| 94 | struct cm_port *port; |
| 95 | union ib_gid dgid; |
| 96 | struct ib_ah_attr ah_attr; |
| 97 | u16 pkey_index; |
| 98 | u8 packet_life_time; |
| 99 | }; |
| 100 | |
| 101 | struct cm_work { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 102 | struct delayed_work work; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 103 | struct list_head list; |
| 104 | struct cm_port *port; |
| 105 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 106 | __be32 local_id; /* Established / timewait */ |
| 107 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 108 | struct ib_cm_event cm_event; |
| 109 | struct ib_sa_path_rec path[0]; |
| 110 | }; |
| 111 | |
| 112 | struct cm_timewait_info { |
| 113 | struct cm_work work; /* Must be first. */ |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 114 | struct list_head list; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 115 | struct rb_node remote_qp_node; |
| 116 | struct rb_node remote_id_node; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 117 | __be64 remote_ca_guid; |
| 118 | __be32 remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 119 | u8 inserted_remote_qp; |
| 120 | u8 inserted_remote_id; |
| 121 | }; |
| 122 | |
| 123 | struct cm_id_private { |
| 124 | struct ib_cm_id id; |
| 125 | |
| 126 | struct rb_node service_node; |
| 127 | struct rb_node sidr_id_node; |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 128 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 129 | struct completion comp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 130 | atomic_t refcount; |
| 131 | |
| 132 | struct ib_mad_send_buf *msg; |
| 133 | struct cm_timewait_info *timewait_info; |
| 134 | /* todo: use alternate port on send failure */ |
| 135 | struct cm_av av; |
| 136 | struct cm_av alt_av; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 137 | struct ib_cm_compare_data *compare_data; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 138 | |
| 139 | void *private_data; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 140 | __be64 tid; |
| 141 | __be32 local_qpn; |
| 142 | __be32 remote_qpn; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 143 | enum ib_qp_type qp_type; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 144 | __be32 sq_psn; |
| 145 | __be32 rq_psn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 146 | int timeout_ms; |
| 147 | enum ib_mtu path_mtu; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 148 | __be16 pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 149 | u8 private_data_len; |
| 150 | u8 max_cm_retries; |
| 151 | u8 peer_to_peer; |
| 152 | u8 responder_resources; |
| 153 | u8 initiator_depth; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 154 | u8 retry_count; |
| 155 | u8 rnr_retry_count; |
| 156 | u8 service_timeout; |
| 157 | |
| 158 | struct list_head work_list; |
| 159 | atomic_t work_count; |
| 160 | }; |
| 161 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 162 | static void cm_work_handler(struct work_struct *work); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 163 | |
| 164 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) |
| 165 | { |
| 166 | if (atomic_dec_and_test(&cm_id_priv->refcount)) |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 167 | complete(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, |
| 171 | struct ib_mad_send_buf **msg) |
| 172 | { |
| 173 | struct ib_mad_agent *mad_agent; |
| 174 | struct ib_mad_send_buf *m; |
| 175 | struct ib_ah *ah; |
| 176 | |
| 177 | mad_agent = cm_id_priv->av.port->mad_agent; |
| 178 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); |
| 179 | if (IS_ERR(ah)) |
| 180 | return PTR_ERR(ah); |
| 181 | |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 182 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 183 | cm_id_priv->av.pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 184 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 185 | GFP_ATOMIC); |
| 186 | if (IS_ERR(m)) { |
| 187 | ib_destroy_ah(ah); |
| 188 | return PTR_ERR(m); |
| 189 | } |
| 190 | |
| 191 | /* Timeout set by caller if response is expected. */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 192 | m->ah = ah; |
| 193 | m->retries = cm_id_priv->max_cm_retries; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 194 | |
| 195 | atomic_inc(&cm_id_priv->refcount); |
| 196 | m->context[0] = cm_id_priv; |
| 197 | *msg = m; |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int cm_alloc_response_msg(struct cm_port *port, |
| 202 | struct ib_mad_recv_wc *mad_recv_wc, |
| 203 | struct ib_mad_send_buf **msg) |
| 204 | { |
| 205 | struct ib_mad_send_buf *m; |
| 206 | struct ib_ah *ah; |
| 207 | |
| 208 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, |
| 209 | mad_recv_wc->recv_buf.grh, port->port_num); |
| 210 | if (IS_ERR(ah)) |
| 211 | return PTR_ERR(ah); |
| 212 | |
| 213 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 214 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 215 | GFP_ATOMIC); |
| 216 | if (IS_ERR(m)) { |
| 217 | ib_destroy_ah(ah); |
| 218 | return PTR_ERR(m); |
| 219 | } |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 220 | m->ah = ah; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 221 | *msg = m; |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static void cm_free_msg(struct ib_mad_send_buf *msg) |
| 226 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 227 | ib_destroy_ah(msg->ah); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 228 | if (msg->context[0]) |
| 229 | cm_deref_id(msg->context[0]); |
| 230 | ib_free_send_mad(msg); |
| 231 | } |
| 232 | |
| 233 | static void * cm_copy_private_data(const void *private_data, |
| 234 | u8 private_data_len) |
| 235 | { |
| 236 | void *data; |
| 237 | |
| 238 | if (!private_data || !private_data_len) |
| 239 | return NULL; |
| 240 | |
Eric Sesterhenn | bed8bdf | 2006-10-23 22:17:21 +0200 | [diff] [blame] | 241 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 242 | if (!data) |
| 243 | return ERR_PTR(-ENOMEM); |
| 244 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 245 | return data; |
| 246 | } |
| 247 | |
| 248 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, |
| 249 | void *private_data, u8 private_data_len) |
| 250 | { |
| 251 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) |
| 252 | kfree(cm_id_priv->private_data); |
| 253 | |
| 254 | cm_id_priv->private_data = private_data; |
| 255 | cm_id_priv->private_data_len = private_data_len; |
| 256 | } |
| 257 | |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 258 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
| 259 | struct ib_grh *grh, struct cm_av *av) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 260 | { |
| 261 | av->port = port; |
| 262 | av->pkey_index = wc->pkey_index; |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 263 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
| 264 | grh, &av->ah_attr); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) |
| 268 | { |
| 269 | struct cm_device *cm_dev; |
| 270 | struct cm_port *port = NULL; |
| 271 | unsigned long flags; |
| 272 | int ret; |
| 273 | u8 p; |
| 274 | |
| 275 | read_lock_irqsave(&cm.device_lock, flags); |
| 276 | list_for_each_entry(cm_dev, &cm.device_list, list) { |
| 277 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, |
| 278 | &p, NULL)) { |
| 279 | port = &cm_dev->port[p-1]; |
| 280 | break; |
| 281 | } |
| 282 | } |
| 283 | read_unlock_irqrestore(&cm.device_lock, flags); |
| 284 | |
| 285 | if (!port) |
| 286 | return -EINVAL; |
| 287 | |
| 288 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, |
| 289 | be16_to_cpu(path->pkey), &av->pkey_index); |
| 290 | if (ret) |
| 291 | return ret; |
| 292 | |
| 293 | av->port = port; |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 294 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
| 295 | &av->ah_attr); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 296 | av->packet_life_time = path->packet_life_time; |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) |
| 301 | { |
| 302 | unsigned long flags; |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 303 | int ret, id; |
Sean Hefty | de1bb1a | 2005-11-30 10:01:13 -0800 | [diff] [blame] | 304 | static int next_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 305 | |
| 306 | do { |
| 307 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 308 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
Michael S. Tsirkin | 9f81036c | 2007-05-21 19:06:54 +0300 | [diff] [blame^] | 309 | next_id, &id); |
| 310 | if (!ret) |
| 311 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 312 | spin_unlock_irqrestore(&cm.lock, flags); |
| 313 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 314 | |
| 315 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 316 | return ret; |
| 317 | } |
| 318 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 319 | static void cm_free_id(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 320 | { |
| 321 | unsigned long flags; |
| 322 | |
| 323 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 324 | idr_remove(&cm.local_id_table, |
| 325 | (__force int) (local_id ^ cm.random_id_operand)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 326 | spin_unlock_irqrestore(&cm.lock, flags); |
| 327 | } |
| 328 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 329 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 330 | { |
| 331 | struct cm_id_private *cm_id_priv; |
| 332 | |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 333 | cm_id_priv = idr_find(&cm.local_id_table, |
| 334 | (__force int) (local_id ^ cm.random_id_operand)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 335 | if (cm_id_priv) { |
| 336 | if (cm_id_priv->id.remote_id == remote_id) |
| 337 | atomic_inc(&cm_id_priv->refcount); |
| 338 | else |
| 339 | cm_id_priv = NULL; |
| 340 | } |
| 341 | |
| 342 | return cm_id_priv; |
| 343 | } |
| 344 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 345 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 346 | { |
| 347 | struct cm_id_private *cm_id_priv; |
| 348 | unsigned long flags; |
| 349 | |
| 350 | spin_lock_irqsave(&cm.lock, flags); |
| 351 | cm_id_priv = cm_get_id(local_id, remote_id); |
| 352 | spin_unlock_irqrestore(&cm.lock, flags); |
| 353 | |
| 354 | return cm_id_priv; |
| 355 | } |
| 356 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 357 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
| 358 | { |
| 359 | int i; |
| 360 | |
| 361 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) |
| 362 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & |
| 363 | ((unsigned long *) mask)[i]; |
| 364 | } |
| 365 | |
| 366 | static int cm_compare_data(struct ib_cm_compare_data *src_data, |
| 367 | struct ib_cm_compare_data *dst_data) |
| 368 | { |
| 369 | u8 src[IB_CM_COMPARE_SIZE]; |
| 370 | u8 dst[IB_CM_COMPARE_SIZE]; |
| 371 | |
| 372 | if (!src_data || !dst_data) |
| 373 | return 0; |
| 374 | |
| 375 | cm_mask_copy(src, src_data->data, dst_data->mask); |
| 376 | cm_mask_copy(dst, dst_data->data, src_data->mask); |
| 377 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); |
| 378 | } |
| 379 | |
| 380 | static int cm_compare_private_data(u8 *private_data, |
| 381 | struct ib_cm_compare_data *dst_data) |
| 382 | { |
| 383 | u8 src[IB_CM_COMPARE_SIZE]; |
| 384 | |
| 385 | if (!dst_data) |
| 386 | return 0; |
| 387 | |
| 388 | cm_mask_copy(src, private_data, dst_data->mask); |
| 389 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); |
| 390 | } |
| 391 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 392 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
| 393 | { |
| 394 | struct rb_node **link = &cm.listen_service_table.rb_node; |
| 395 | struct rb_node *parent = NULL; |
| 396 | struct cm_id_private *cur_cm_id_priv; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 397 | __be64 service_id = cm_id_priv->id.service_id; |
| 398 | __be64 service_mask = cm_id_priv->id.service_mask; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 399 | int data_cmp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 400 | |
| 401 | while (*link) { |
| 402 | parent = *link; |
| 403 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 404 | service_node); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 405 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
| 406 | cur_cm_id_priv->compare_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 407 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 408 | (service_mask & cur_cm_id_priv->id.service_id) && |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 409 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
| 410 | !data_cmp) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 411 | return cur_cm_id_priv; |
| 412 | |
| 413 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) |
| 414 | link = &(*link)->rb_left; |
| 415 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) |
| 416 | link = &(*link)->rb_right; |
| 417 | else if (service_id < cur_cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 418 | link = &(*link)->rb_left; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 419 | else if (service_id > cur_cm_id_priv->id.service_id) |
| 420 | link = &(*link)->rb_right; |
| 421 | else if (data_cmp < 0) |
| 422 | link = &(*link)->rb_left; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 423 | else |
| 424 | link = &(*link)->rb_right; |
| 425 | } |
| 426 | rb_link_node(&cm_id_priv->service_node, parent, link); |
| 427 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); |
| 428 | return NULL; |
| 429 | } |
| 430 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 431 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 432 | __be64 service_id, |
| 433 | u8 *private_data) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 434 | { |
| 435 | struct rb_node *node = cm.listen_service_table.rb_node; |
| 436 | struct cm_id_private *cm_id_priv; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 437 | int data_cmp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 438 | |
| 439 | while (node) { |
| 440 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 441 | data_cmp = cm_compare_private_data(private_data, |
| 442 | cm_id_priv->compare_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 443 | if ((cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 444 | cm_id_priv->id.service_id && |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 445 | (cm_id_priv->id.device == device) && !data_cmp) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 446 | return cm_id_priv; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 447 | |
| 448 | if (device < cm_id_priv->id.device) |
| 449 | node = node->rb_left; |
| 450 | else if (device > cm_id_priv->id.device) |
| 451 | node = node->rb_right; |
| 452 | else if (service_id < cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 453 | node = node->rb_left; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 454 | else if (service_id > cm_id_priv->id.service_id) |
| 455 | node = node->rb_right; |
| 456 | else if (data_cmp < 0) |
| 457 | node = node->rb_left; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 458 | else |
| 459 | node = node->rb_right; |
| 460 | } |
| 461 | return NULL; |
| 462 | } |
| 463 | |
| 464 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info |
| 465 | *timewait_info) |
| 466 | { |
| 467 | struct rb_node **link = &cm.remote_id_table.rb_node; |
| 468 | struct rb_node *parent = NULL; |
| 469 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 470 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 471 | __be32 remote_id = timewait_info->work.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 472 | |
| 473 | while (*link) { |
| 474 | parent = *link; |
| 475 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 476 | remote_id_node); |
| 477 | if (remote_id < cur_timewait_info->work.remote_id) |
| 478 | link = &(*link)->rb_left; |
| 479 | else if (remote_id > cur_timewait_info->work.remote_id) |
| 480 | link = &(*link)->rb_right; |
| 481 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 482 | link = &(*link)->rb_left; |
| 483 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 484 | link = &(*link)->rb_right; |
| 485 | else |
| 486 | return cur_timewait_info; |
| 487 | } |
| 488 | timewait_info->inserted_remote_id = 1; |
| 489 | rb_link_node(&timewait_info->remote_id_node, parent, link); |
| 490 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 491 | return NULL; |
| 492 | } |
| 493 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 494 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
| 495 | __be32 remote_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 496 | { |
| 497 | struct rb_node *node = cm.remote_id_table.rb_node; |
| 498 | struct cm_timewait_info *timewait_info; |
| 499 | |
| 500 | while (node) { |
| 501 | timewait_info = rb_entry(node, struct cm_timewait_info, |
| 502 | remote_id_node); |
| 503 | if (remote_id < timewait_info->work.remote_id) |
| 504 | node = node->rb_left; |
| 505 | else if (remote_id > timewait_info->work.remote_id) |
| 506 | node = node->rb_right; |
| 507 | else if (remote_ca_guid < timewait_info->remote_ca_guid) |
| 508 | node = node->rb_left; |
| 509 | else if (remote_ca_guid > timewait_info->remote_ca_guid) |
| 510 | node = node->rb_right; |
| 511 | else |
| 512 | return timewait_info; |
| 513 | } |
| 514 | return NULL; |
| 515 | } |
| 516 | |
| 517 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info |
| 518 | *timewait_info) |
| 519 | { |
| 520 | struct rb_node **link = &cm.remote_qp_table.rb_node; |
| 521 | struct rb_node *parent = NULL; |
| 522 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 523 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 524 | __be32 remote_qpn = timewait_info->remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 525 | |
| 526 | while (*link) { |
| 527 | parent = *link; |
| 528 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 529 | remote_qp_node); |
| 530 | if (remote_qpn < cur_timewait_info->remote_qpn) |
| 531 | link = &(*link)->rb_left; |
| 532 | else if (remote_qpn > cur_timewait_info->remote_qpn) |
| 533 | link = &(*link)->rb_right; |
| 534 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 535 | link = &(*link)->rb_left; |
| 536 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 537 | link = &(*link)->rb_right; |
| 538 | else |
| 539 | return cur_timewait_info; |
| 540 | } |
| 541 | timewait_info->inserted_remote_qp = 1; |
| 542 | rb_link_node(&timewait_info->remote_qp_node, parent, link); |
| 543 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 544 | return NULL; |
| 545 | } |
| 546 | |
| 547 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private |
| 548 | *cm_id_priv) |
| 549 | { |
| 550 | struct rb_node **link = &cm.remote_sidr_table.rb_node; |
| 551 | struct rb_node *parent = NULL; |
| 552 | struct cm_id_private *cur_cm_id_priv; |
| 553 | union ib_gid *port_gid = &cm_id_priv->av.dgid; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 554 | __be32 remote_id = cm_id_priv->id.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 555 | |
| 556 | while (*link) { |
| 557 | parent = *link; |
| 558 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 559 | sidr_id_node); |
| 560 | if (remote_id < cur_cm_id_priv->id.remote_id) |
| 561 | link = &(*link)->rb_left; |
| 562 | else if (remote_id > cur_cm_id_priv->id.remote_id) |
| 563 | link = &(*link)->rb_right; |
| 564 | else { |
| 565 | int cmp; |
| 566 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, |
| 567 | sizeof *port_gid); |
| 568 | if (cmp < 0) |
| 569 | link = &(*link)->rb_left; |
| 570 | else if (cmp > 0) |
| 571 | link = &(*link)->rb_right; |
| 572 | else |
| 573 | return cur_cm_id_priv; |
| 574 | } |
| 575 | } |
| 576 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); |
| 577 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 578 | return NULL; |
| 579 | } |
| 580 | |
| 581 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, |
| 582 | enum ib_cm_sidr_status status) |
| 583 | { |
| 584 | struct ib_cm_sidr_rep_param param; |
| 585 | |
| 586 | memset(¶m, 0, sizeof param); |
| 587 | param.status = status; |
| 588 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); |
| 589 | } |
| 590 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 591 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
| 592 | ib_cm_handler cm_handler, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 593 | void *context) |
| 594 | { |
| 595 | struct cm_id_private *cm_id_priv; |
| 596 | int ret; |
| 597 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 598 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 599 | if (!cm_id_priv) |
| 600 | return ERR_PTR(-ENOMEM); |
| 601 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 602 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 603 | cm_id_priv->id.device = device; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 604 | cm_id_priv->id.cm_handler = cm_handler; |
| 605 | cm_id_priv->id.context = context; |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 606 | cm_id_priv->id.remote_cm_qpn = 1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 607 | ret = cm_alloc_id(cm_id_priv); |
| 608 | if (ret) |
| 609 | goto error; |
| 610 | |
| 611 | spin_lock_init(&cm_id_priv->lock); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 612 | init_completion(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 613 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
| 614 | atomic_set(&cm_id_priv->work_count, -1); |
| 615 | atomic_set(&cm_id_priv->refcount, 1); |
| 616 | return &cm_id_priv->id; |
| 617 | |
| 618 | error: |
| 619 | kfree(cm_id_priv); |
| 620 | return ERR_PTR(-ENOMEM); |
| 621 | } |
| 622 | EXPORT_SYMBOL(ib_create_cm_id); |
| 623 | |
| 624 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) |
| 625 | { |
| 626 | struct cm_work *work; |
| 627 | |
| 628 | if (list_empty(&cm_id_priv->work_list)) |
| 629 | return NULL; |
| 630 | |
| 631 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); |
| 632 | list_del(&work->list); |
| 633 | return work; |
| 634 | } |
| 635 | |
| 636 | static void cm_free_work(struct cm_work *work) |
| 637 | { |
| 638 | if (work->mad_recv_wc) |
| 639 | ib_free_recv_mad(work->mad_recv_wc); |
| 640 | kfree(work); |
| 641 | } |
| 642 | |
| 643 | static inline int cm_convert_to_ms(int iba_time) |
| 644 | { |
| 645 | /* approximate conversion to ms from 4.096us x 2^iba_time */ |
| 646 | return 1 << max(iba_time - 8, 0); |
| 647 | } |
| 648 | |
| 649 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
| 650 | { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 651 | if (timewait_info->inserted_remote_id) { |
| 652 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 653 | timewait_info->inserted_remote_id = 0; |
| 654 | } |
| 655 | |
| 656 | if (timewait_info->inserted_remote_qp) { |
| 657 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 658 | timewait_info->inserted_remote_qp = 0; |
| 659 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 662 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 663 | { |
| 664 | struct cm_timewait_info *timewait_info; |
| 665 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 666 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 667 | if (!timewait_info) |
| 668 | return ERR_PTR(-ENOMEM); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 669 | |
| 670 | timewait_info->work.local_id = local_id; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 671 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 672 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
| 673 | return timewait_info; |
| 674 | } |
| 675 | |
| 676 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) |
| 677 | { |
| 678 | int wait_time; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 679 | unsigned long flags; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 680 | |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 681 | spin_lock_irqsave(&cm.lock, flags); |
Michael S. Tsirkin | a70d059 | 2006-08-28 16:32:50 +0300 | [diff] [blame] | 682 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 683 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
| 684 | spin_unlock_irqrestore(&cm.lock, flags); |
Michael S. Tsirkin | a70d059 | 2006-08-28 16:32:50 +0300 | [diff] [blame] | 685 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 686 | /* |
| 687 | * The cm_id could be destroyed by the user before we exit timewait. |
| 688 | * To protect against this, we search for the cm_id after exiting |
| 689 | * timewait before notifying the user that we've exited timewait. |
| 690 | */ |
| 691 | cm_id_priv->id.state = IB_CM_TIMEWAIT; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 692 | wait_time = cm_convert_to_ms(cm_id_priv->av.packet_life_time + 1); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 693 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
| 694 | msecs_to_jiffies(wait_time)); |
| 695 | cm_id_priv->timewait_info = NULL; |
| 696 | } |
| 697 | |
| 698 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) |
| 699 | { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 700 | unsigned long flags; |
| 701 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 702 | cm_id_priv->id.state = IB_CM_IDLE; |
| 703 | if (cm_id_priv->timewait_info) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 704 | spin_lock_irqsave(&cm.lock, flags); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 705 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 706 | spin_unlock_irqrestore(&cm.lock, flags); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 707 | kfree(cm_id_priv->timewait_info); |
| 708 | cm_id_priv->timewait_info = NULL; |
| 709 | } |
| 710 | } |
| 711 | |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 712 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 713 | { |
| 714 | struct cm_id_private *cm_id_priv; |
| 715 | struct cm_work *work; |
| 716 | unsigned long flags; |
| 717 | |
| 718 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 719 | retest: |
| 720 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 721 | switch (cm_id->state) { |
| 722 | case IB_CM_LISTEN: |
| 723 | cm_id->state = IB_CM_IDLE; |
| 724 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 725 | spin_lock_irqsave(&cm.lock, flags); |
| 726 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
| 727 | spin_unlock_irqrestore(&cm.lock, flags); |
| 728 | break; |
| 729 | case IB_CM_SIDR_REQ_SENT: |
| 730 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 731 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 732 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 733 | break; |
| 734 | case IB_CM_SIDR_REQ_RCVD: |
| 735 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 736 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
| 737 | break; |
| 738 | case IB_CM_REQ_SENT: |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 739 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| 740 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 741 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 742 | &cm_id_priv->id.device->node_guid, |
| 743 | sizeof cm_id_priv->id.device->node_guid, |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 744 | NULL, 0); |
| 745 | break; |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 746 | case IB_CM_REQ_RCVD: |
| 747 | if (err == -ENOMEM) { |
| 748 | /* Do not reject to allow future retries. */ |
| 749 | cm_reset_to_idle(cm_id_priv); |
| 750 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 751 | } else { |
| 752 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 753 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 754 | NULL, 0, NULL, 0); |
| 755 | } |
| 756 | break; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 757 | case IB_CM_MRA_REQ_RCVD: |
| 758 | case IB_CM_REP_SENT: |
| 759 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 760 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 761 | /* Fall through */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 762 | case IB_CM_MRA_REQ_SENT: |
| 763 | case IB_CM_REP_RCVD: |
| 764 | case IB_CM_MRA_REP_SENT: |
| 765 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 766 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 767 | NULL, 0, NULL, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 768 | break; |
| 769 | case IB_CM_ESTABLISHED: |
| 770 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 771 | ib_send_cm_dreq(cm_id, NULL, 0); |
| 772 | goto retest; |
| 773 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 774 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 775 | cm_enter_timewait(cm_id_priv); |
| 776 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 777 | break; |
| 778 | case IB_CM_DREQ_RCVD: |
| 779 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 780 | ib_send_cm_drep(cm_id, NULL, 0); |
| 781 | break; |
| 782 | default: |
| 783 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 784 | break; |
| 785 | } |
| 786 | |
| 787 | cm_free_id(cm_id->local_id); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 788 | cm_deref_id(cm_id_priv); |
| 789 | wait_for_completion(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 790 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
| 791 | cm_free_work(work); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 792 | kfree(cm_id_priv->compare_data); |
| 793 | kfree(cm_id_priv->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 794 | kfree(cm_id_priv); |
| 795 | } |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 796 | |
| 797 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) |
| 798 | { |
| 799 | cm_destroy_id(cm_id, 0); |
| 800 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 801 | EXPORT_SYMBOL(ib_destroy_cm_id); |
| 802 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 803 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
| 804 | struct ib_cm_compare_data *compare_data) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 805 | { |
| 806 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 807 | unsigned long flags; |
| 808 | int ret = 0; |
| 809 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 810 | service_mask = service_mask ? service_mask : |
| 811 | __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 812 | service_id &= service_mask; |
| 813 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && |
| 814 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) |
| 815 | return -EINVAL; |
| 816 | |
| 817 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 818 | if (cm_id->state != IB_CM_IDLE) |
| 819 | return -EINVAL; |
| 820 | |
| 821 | if (compare_data) { |
| 822 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, |
| 823 | GFP_KERNEL); |
| 824 | if (!cm_id_priv->compare_data) |
| 825 | return -ENOMEM; |
| 826 | cm_mask_copy(cm_id_priv->compare_data->data, |
| 827 | compare_data->data, compare_data->mask); |
| 828 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, |
| 829 | IB_CM_COMPARE_SIZE); |
| 830 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 831 | |
| 832 | cm_id->state = IB_CM_LISTEN; |
| 833 | |
| 834 | spin_lock_irqsave(&cm.lock, flags); |
| 835 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 836 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
| 837 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 838 | } else { |
| 839 | cm_id->service_id = service_id; |
| 840 | cm_id->service_mask = service_mask; |
| 841 | } |
| 842 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); |
| 843 | spin_unlock_irqrestore(&cm.lock, flags); |
| 844 | |
| 845 | if (cur_cm_id_priv) { |
| 846 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 847 | kfree(cm_id_priv->compare_data); |
| 848 | cm_id_priv->compare_data = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 849 | ret = -EBUSY; |
| 850 | } |
| 851 | return ret; |
| 852 | } |
| 853 | EXPORT_SYMBOL(ib_cm_listen); |
| 854 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 855 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
| 856 | enum cm_msg_sequence msg_seq) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 857 | { |
| 858 | u64 hi_tid, low_tid; |
| 859 | |
| 860 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 861 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
| 862 | (msg_seq << 30)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 863 | return cpu_to_be64(hi_tid | low_tid); |
| 864 | } |
| 865 | |
| 866 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 867 | __be16 attr_id, __be64 tid) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 868 | { |
| 869 | hdr->base_version = IB_MGMT_BASE_VERSION; |
| 870 | hdr->mgmt_class = IB_MGMT_CLASS_CM; |
| 871 | hdr->class_version = IB_CM_CLASS_VERSION; |
| 872 | hdr->method = IB_MGMT_METHOD_SEND; |
| 873 | hdr->attr_id = attr_id; |
| 874 | hdr->tid = tid; |
| 875 | } |
| 876 | |
| 877 | static void cm_format_req(struct cm_req_msg *req_msg, |
| 878 | struct cm_id_private *cm_id_priv, |
| 879 | struct ib_cm_req_param *param) |
| 880 | { |
| 881 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
| 882 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); |
| 883 | |
| 884 | req_msg->local_comm_id = cm_id_priv->id.local_id; |
| 885 | req_msg->service_id = param->service_id; |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 886 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 887 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
| 888 | cm_req_set_resp_res(req_msg, param->responder_resources); |
| 889 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
| 890 | cm_req_set_remote_resp_timeout(req_msg, |
| 891 | param->remote_cm_response_timeout); |
| 892 | cm_req_set_qp_type(req_msg, param->qp_type); |
| 893 | cm_req_set_flow_ctrl(req_msg, param->flow_control); |
| 894 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); |
| 895 | cm_req_set_local_resp_timeout(req_msg, |
| 896 | param->local_cm_response_timeout); |
| 897 | cm_req_set_retry_count(req_msg, param->retry_count); |
| 898 | req_msg->pkey = param->primary_path->pkey; |
| 899 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); |
| 900 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); |
| 901 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
| 902 | cm_req_set_srq(req_msg, param->srq); |
| 903 | |
| 904 | req_msg->primary_local_lid = param->primary_path->slid; |
| 905 | req_msg->primary_remote_lid = param->primary_path->dlid; |
| 906 | req_msg->primary_local_gid = param->primary_path->sgid; |
| 907 | req_msg->primary_remote_gid = param->primary_path->dgid; |
| 908 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); |
| 909 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); |
| 910 | req_msg->primary_traffic_class = param->primary_path->traffic_class; |
| 911 | req_msg->primary_hop_limit = param->primary_path->hop_limit; |
| 912 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); |
| 913 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ |
| 914 | cm_req_set_primary_local_ack_timeout(req_msg, |
| 915 | min(31, param->primary_path->packet_life_time + 1)); |
| 916 | |
| 917 | if (param->alternate_path) { |
| 918 | req_msg->alt_local_lid = param->alternate_path->slid; |
| 919 | req_msg->alt_remote_lid = param->alternate_path->dlid; |
| 920 | req_msg->alt_local_gid = param->alternate_path->sgid; |
| 921 | req_msg->alt_remote_gid = param->alternate_path->dgid; |
| 922 | cm_req_set_alt_flow_label(req_msg, |
| 923 | param->alternate_path->flow_label); |
| 924 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); |
| 925 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; |
| 926 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; |
| 927 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); |
| 928 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ |
| 929 | cm_req_set_alt_local_ack_timeout(req_msg, |
| 930 | min(31, param->alternate_path->packet_life_time + 1)); |
| 931 | } |
| 932 | |
| 933 | if (param->private_data && param->private_data_len) |
| 934 | memcpy(req_msg->private_data, param->private_data, |
| 935 | param->private_data_len); |
| 936 | } |
| 937 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 938 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 939 | { |
| 940 | /* peer-to-peer not supported */ |
| 941 | if (param->peer_to_peer) |
| 942 | return -EINVAL; |
| 943 | |
| 944 | if (!param->primary_path) |
| 945 | return -EINVAL; |
| 946 | |
| 947 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) |
| 948 | return -EINVAL; |
| 949 | |
| 950 | if (param->private_data && |
| 951 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) |
| 952 | return -EINVAL; |
| 953 | |
| 954 | if (param->alternate_path && |
| 955 | (param->alternate_path->pkey != param->primary_path->pkey || |
| 956 | param->alternate_path->mtu != param->primary_path->mtu)) |
| 957 | return -EINVAL; |
| 958 | |
| 959 | return 0; |
| 960 | } |
| 961 | |
| 962 | int ib_send_cm_req(struct ib_cm_id *cm_id, |
| 963 | struct ib_cm_req_param *param) |
| 964 | { |
| 965 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 966 | struct cm_req_msg *req_msg; |
| 967 | unsigned long flags; |
| 968 | int ret; |
| 969 | |
| 970 | ret = cm_validate_req_param(param); |
| 971 | if (ret) |
| 972 | return ret; |
| 973 | |
| 974 | /* Verify that we're not in timewait. */ |
| 975 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 976 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 977 | if (cm_id->state != IB_CM_IDLE) { |
| 978 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 979 | ret = -EINVAL; |
| 980 | goto out; |
| 981 | } |
| 982 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 983 | |
| 984 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 985 | id.local_id); |
Sean Hefty | 75df23e | 2006-07-25 19:52:01 +0300 | [diff] [blame] | 986 | if (IS_ERR(cm_id_priv->timewait_info)) { |
| 987 | ret = PTR_ERR(cm_id_priv->timewait_info); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 988 | goto out; |
Sean Hefty | 75df23e | 2006-07-25 19:52:01 +0300 | [diff] [blame] | 989 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 990 | |
| 991 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); |
| 992 | if (ret) |
| 993 | goto error1; |
| 994 | if (param->alternate_path) { |
| 995 | ret = cm_init_av_by_path(param->alternate_path, |
| 996 | &cm_id_priv->alt_av); |
| 997 | if (ret) |
| 998 | goto error1; |
| 999 | } |
| 1000 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1001 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1002 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 1003 | param->primary_path->packet_life_time) * 2 + |
| 1004 | cm_convert_to_ms( |
| 1005 | param->remote_cm_response_timeout); |
| 1006 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 1007 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 1008 | cm_id_priv->responder_resources = param->responder_resources; |
| 1009 | cm_id_priv->retry_count = param->retry_count; |
| 1010 | cm_id_priv->path_mtu = param->primary_path->mtu; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1011 | cm_id_priv->pkey = param->primary_path->pkey; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 1012 | cm_id_priv->qp_type = param->qp_type; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1013 | |
| 1014 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); |
| 1015 | if (ret) |
| 1016 | goto error1; |
| 1017 | |
| 1018 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; |
| 1019 | cm_format_req(req_msg, cm_id_priv, param); |
| 1020 | cm_id_priv->tid = req_msg->hdr.tid; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1021 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1022 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
| 1023 | |
| 1024 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); |
| 1025 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1026 | |
| 1027 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1028 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1029 | if (ret) { |
| 1030 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1031 | goto error2; |
| 1032 | } |
| 1033 | BUG_ON(cm_id->state != IB_CM_IDLE); |
| 1034 | cm_id->state = IB_CM_REQ_SENT; |
| 1035 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1036 | return 0; |
| 1037 | |
| 1038 | error2: cm_free_msg(cm_id_priv->msg); |
| 1039 | error1: kfree(cm_id_priv->timewait_info); |
| 1040 | out: return ret; |
| 1041 | } |
| 1042 | EXPORT_SYMBOL(ib_send_cm_req); |
| 1043 | |
| 1044 | static int cm_issue_rej(struct cm_port *port, |
| 1045 | struct ib_mad_recv_wc *mad_recv_wc, |
| 1046 | enum ib_cm_rej_reason reason, |
| 1047 | enum cm_msg_response msg_rejected, |
| 1048 | void *ari, u8 ari_length) |
| 1049 | { |
| 1050 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1051 | struct cm_rej_msg *rej_msg, *rcv_msg; |
| 1052 | int ret; |
| 1053 | |
| 1054 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| 1055 | if (ret) |
| 1056 | return ret; |
| 1057 | |
| 1058 | /* We just need common CM header information. Cast to any message. */ |
| 1059 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; |
| 1060 | rej_msg = (struct cm_rej_msg *) msg->mad; |
| 1061 | |
| 1062 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); |
| 1063 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; |
| 1064 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; |
| 1065 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1066 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1067 | |
| 1068 | if (ari && ari_length) { |
| 1069 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 1070 | memcpy(rej_msg->ari, ari, ari_length); |
| 1071 | } |
| 1072 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1073 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1074 | if (ret) |
| 1075 | cm_free_msg(msg); |
| 1076 | |
| 1077 | return ret; |
| 1078 | } |
| 1079 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1080 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
| 1081 | __be32 local_qpn, __be32 remote_qpn) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1082 | { |
| 1083 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || |
| 1084 | ((local_ca_guid == remote_ca_guid) && |
| 1085 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); |
| 1086 | } |
| 1087 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1088 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1089 | struct ib_sa_path_rec *primary_path, |
| 1090 | struct ib_sa_path_rec *alt_path) |
| 1091 | { |
| 1092 | memset(primary_path, 0, sizeof *primary_path); |
| 1093 | primary_path->dgid = req_msg->primary_local_gid; |
| 1094 | primary_path->sgid = req_msg->primary_remote_gid; |
| 1095 | primary_path->dlid = req_msg->primary_local_lid; |
| 1096 | primary_path->slid = req_msg->primary_remote_lid; |
| 1097 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); |
| 1098 | primary_path->hop_limit = req_msg->primary_hop_limit; |
| 1099 | primary_path->traffic_class = req_msg->primary_traffic_class; |
| 1100 | primary_path->reversible = 1; |
| 1101 | primary_path->pkey = req_msg->pkey; |
| 1102 | primary_path->sl = cm_req_get_primary_sl(req_msg); |
| 1103 | primary_path->mtu_selector = IB_SA_EQ; |
| 1104 | primary_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1105 | primary_path->rate_selector = IB_SA_EQ; |
| 1106 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); |
| 1107 | primary_path->packet_life_time_selector = IB_SA_EQ; |
| 1108 | primary_path->packet_life_time = |
| 1109 | cm_req_get_primary_local_ack_timeout(req_msg); |
| 1110 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
| 1111 | |
| 1112 | if (req_msg->alt_local_lid) { |
| 1113 | memset(alt_path, 0, sizeof *alt_path); |
| 1114 | alt_path->dgid = req_msg->alt_local_gid; |
| 1115 | alt_path->sgid = req_msg->alt_remote_gid; |
| 1116 | alt_path->dlid = req_msg->alt_local_lid; |
| 1117 | alt_path->slid = req_msg->alt_remote_lid; |
| 1118 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); |
| 1119 | alt_path->hop_limit = req_msg->alt_hop_limit; |
| 1120 | alt_path->traffic_class = req_msg->alt_traffic_class; |
| 1121 | alt_path->reversible = 1; |
| 1122 | alt_path->pkey = req_msg->pkey; |
| 1123 | alt_path->sl = cm_req_get_alt_sl(req_msg); |
| 1124 | alt_path->mtu_selector = IB_SA_EQ; |
| 1125 | alt_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1126 | alt_path->rate_selector = IB_SA_EQ; |
| 1127 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); |
| 1128 | alt_path->packet_life_time_selector = IB_SA_EQ; |
| 1129 | alt_path->packet_life_time = |
| 1130 | cm_req_get_alt_local_ack_timeout(req_msg); |
| 1131 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | static void cm_format_req_event(struct cm_work *work, |
| 1136 | struct cm_id_private *cm_id_priv, |
| 1137 | struct ib_cm_id *listen_id) |
| 1138 | { |
| 1139 | struct cm_req_msg *req_msg; |
| 1140 | struct ib_cm_req_event_param *param; |
| 1141 | |
| 1142 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1143 | param = &work->cm_event.param.req_rcvd; |
| 1144 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1145 | param->port = cm_id_priv->av.port->port_num; |
| 1146 | param->primary_path = &work->path[0]; |
| 1147 | if (req_msg->alt_local_lid) |
| 1148 | param->alternate_path = &work->path[1]; |
| 1149 | else |
| 1150 | param->alternate_path = NULL; |
| 1151 | param->remote_ca_guid = req_msg->local_ca_guid; |
| 1152 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); |
| 1153 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); |
| 1154 | param->qp_type = cm_req_get_qp_type(req_msg); |
| 1155 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); |
| 1156 | param->responder_resources = cm_req_get_init_depth(req_msg); |
| 1157 | param->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1158 | param->local_cm_response_timeout = |
| 1159 | cm_req_get_remote_resp_timeout(req_msg); |
| 1160 | param->flow_control = cm_req_get_flow_ctrl(req_msg); |
| 1161 | param->remote_cm_response_timeout = |
| 1162 | cm_req_get_local_resp_timeout(req_msg); |
| 1163 | param->retry_count = cm_req_get_retry_count(req_msg); |
| 1164 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
| 1165 | param->srq = cm_req_get_srq(req_msg); |
| 1166 | work->cm_event.private_data = &req_msg->private_data; |
| 1167 | } |
| 1168 | |
| 1169 | static void cm_process_work(struct cm_id_private *cm_id_priv, |
| 1170 | struct cm_work *work) |
| 1171 | { |
| 1172 | unsigned long flags; |
| 1173 | int ret; |
| 1174 | |
| 1175 | /* We will typically only have the current event to report. */ |
| 1176 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); |
| 1177 | cm_free_work(work); |
| 1178 | |
| 1179 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { |
| 1180 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1181 | work = cm_dequeue_work(cm_id_priv); |
| 1182 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1183 | BUG_ON(!work); |
| 1184 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, |
| 1185 | &work->cm_event); |
| 1186 | cm_free_work(work); |
| 1187 | } |
| 1188 | cm_deref_id(cm_id_priv); |
| 1189 | if (ret) |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1190 | cm_destroy_id(&cm_id_priv->id, ret); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | static void cm_format_mra(struct cm_mra_msg *mra_msg, |
| 1194 | struct cm_id_private *cm_id_priv, |
| 1195 | enum cm_msg_response msg_mraed, u8 service_timeout, |
| 1196 | const void *private_data, u8 private_data_len) |
| 1197 | { |
| 1198 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); |
| 1199 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); |
| 1200 | mra_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1201 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1202 | cm_mra_set_service_timeout(mra_msg, service_timeout); |
| 1203 | |
| 1204 | if (private_data && private_data_len) |
| 1205 | memcpy(mra_msg->private_data, private_data, private_data_len); |
| 1206 | } |
| 1207 | |
| 1208 | static void cm_format_rej(struct cm_rej_msg *rej_msg, |
| 1209 | struct cm_id_private *cm_id_priv, |
| 1210 | enum ib_cm_rej_reason reason, |
| 1211 | void *ari, |
| 1212 | u8 ari_length, |
| 1213 | const void *private_data, |
| 1214 | u8 private_data_len) |
| 1215 | { |
| 1216 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
| 1217 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1218 | |
| 1219 | switch(cm_id_priv->id.state) { |
| 1220 | case IB_CM_REQ_RCVD: |
| 1221 | rej_msg->local_comm_id = 0; |
| 1222 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1223 | break; |
| 1224 | case IB_CM_MRA_REQ_SENT: |
| 1225 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1226 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1227 | break; |
| 1228 | case IB_CM_REP_RCVD: |
| 1229 | case IB_CM_MRA_REP_SENT: |
| 1230 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1231 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); |
| 1232 | break; |
| 1233 | default: |
| 1234 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1235 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); |
| 1236 | break; |
| 1237 | } |
| 1238 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1239 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1240 | if (ari && ari_length) { |
| 1241 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 1242 | memcpy(rej_msg->ari, ari, ari_length); |
| 1243 | } |
| 1244 | |
| 1245 | if (private_data && private_data_len) |
| 1246 | memcpy(rej_msg->private_data, private_data, private_data_len); |
| 1247 | } |
| 1248 | |
| 1249 | static void cm_dup_req_handler(struct cm_work *work, |
| 1250 | struct cm_id_private *cm_id_priv) |
| 1251 | { |
| 1252 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1253 | unsigned long flags; |
| 1254 | int ret; |
| 1255 | |
| 1256 | /* Quick state check to discard duplicate REQs. */ |
| 1257 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) |
| 1258 | return; |
| 1259 | |
| 1260 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1261 | if (ret) |
| 1262 | return; |
| 1263 | |
| 1264 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1265 | switch (cm_id_priv->id.state) { |
| 1266 | case IB_CM_MRA_REQ_SENT: |
| 1267 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1268 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, |
| 1269 | cm_id_priv->private_data, |
| 1270 | cm_id_priv->private_data_len); |
| 1271 | break; |
| 1272 | case IB_CM_TIMEWAIT: |
| 1273 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, |
| 1274 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); |
| 1275 | break; |
| 1276 | default: |
| 1277 | goto unlock; |
| 1278 | } |
| 1279 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1280 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1281 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1282 | if (ret) |
| 1283 | goto free; |
| 1284 | return; |
| 1285 | |
| 1286 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1287 | free: cm_free_msg(msg); |
| 1288 | } |
| 1289 | |
| 1290 | static struct cm_id_private * cm_match_req(struct cm_work *work, |
| 1291 | struct cm_id_private *cm_id_priv) |
| 1292 | { |
| 1293 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; |
| 1294 | struct cm_timewait_info *timewait_info; |
| 1295 | struct cm_req_msg *req_msg; |
| 1296 | unsigned long flags; |
| 1297 | |
| 1298 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1299 | |
| 1300 | /* Check for duplicate REQ and stale connections. */ |
| 1301 | spin_lock_irqsave(&cm.lock, flags); |
| 1302 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
| 1303 | if (!timewait_info) |
| 1304 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
| 1305 | |
| 1306 | if (timewait_info) { |
| 1307 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, |
| 1308 | timewait_info->work.remote_id); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1309 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1310 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1311 | if (cur_cm_id_priv) { |
| 1312 | cm_dup_req_handler(work, cur_cm_id_priv); |
| 1313 | cm_deref_id(cur_cm_id_priv); |
| 1314 | } else |
| 1315 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1316 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, |
| 1317 | NULL, 0); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1318 | listen_cm_id_priv = NULL; |
| 1319 | goto out; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1320 | } |
| 1321 | |
| 1322 | /* Find matching listen request. */ |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1323 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 1324 | req_msg->service_id, |
| 1325 | req_msg->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1326 | if (!listen_cm_id_priv) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1327 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1328 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1329 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1330 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, |
| 1331 | NULL, 0); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1332 | goto out; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1333 | } |
| 1334 | atomic_inc(&listen_cm_id_priv->refcount); |
| 1335 | atomic_inc(&cm_id_priv->refcount); |
| 1336 | cm_id_priv->id.state = IB_CM_REQ_RCVD; |
| 1337 | atomic_inc(&cm_id_priv->work_count); |
| 1338 | spin_unlock_irqrestore(&cm.lock, flags); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1339 | out: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1340 | return listen_cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | static int cm_req_handler(struct cm_work *work) |
| 1344 | { |
| 1345 | struct ib_cm_id *cm_id; |
| 1346 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
| 1347 | struct cm_req_msg *req_msg; |
| 1348 | int ret; |
| 1349 | |
| 1350 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1351 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1352 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1353 | if (IS_ERR(cm_id)) |
| 1354 | return PTR_ERR(cm_id); |
| 1355 | |
| 1356 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1357 | cm_id_priv->id.remote_id = req_msg->local_comm_id; |
| 1358 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 1359 | work->mad_recv_wc->recv_buf.grh, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1360 | &cm_id_priv->av); |
| 1361 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 1362 | id.local_id); |
| 1363 | if (IS_ERR(cm_id_priv->timewait_info)) { |
| 1364 | ret = PTR_ERR(cm_id_priv->timewait_info); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1365 | goto destroy; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1366 | } |
| 1367 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; |
| 1368 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; |
| 1369 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1370 | |
| 1371 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); |
| 1372 | if (!listen_cm_id_priv) { |
| 1373 | ret = -EINVAL; |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1374 | kfree(cm_id_priv->timewait_info); |
| 1375 | goto destroy; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
| 1379 | cm_id_priv->id.context = listen_cm_id_priv->id.context; |
| 1380 | cm_id_priv->id.service_id = req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1381 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1382 | |
| 1383 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
| 1384 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1385 | if (ret) { |
| 1386 | ib_get_cached_gid(work->port->cm_dev->device, |
| 1387 | work->port->port_num, 0, &work->path[0].sgid); |
| 1388 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, |
| 1389 | &work->path[0].sgid, sizeof work->path[0].sgid, |
| 1390 | NULL, 0); |
| 1391 | goto rejected; |
| 1392 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1393 | if (req_msg->alt_local_lid) { |
| 1394 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1395 | if (ret) { |
| 1396 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, |
| 1397 | &work->path[0].sgid, |
| 1398 | sizeof work->path[0].sgid, NULL, 0); |
| 1399 | goto rejected; |
| 1400 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1401 | } |
| 1402 | cm_id_priv->tid = req_msg->hdr.tid; |
| 1403 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 1404 | cm_req_get_local_resp_timeout(req_msg)); |
| 1405 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); |
| 1406 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1407 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1408 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); |
| 1409 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1410 | cm_id_priv->pkey = req_msg->pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1411 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1412 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
| 1413 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 1414 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1415 | |
| 1416 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| 1417 | cm_process_work(cm_id_priv, work); |
| 1418 | cm_deref_id(listen_cm_id_priv); |
| 1419 | return 0; |
| 1420 | |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1421 | rejected: |
| 1422 | atomic_dec(&cm_id_priv->refcount); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1423 | cm_deref_id(listen_cm_id_priv); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1424 | destroy: |
| 1425 | ib_destroy_cm_id(cm_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1426 | return ret; |
| 1427 | } |
| 1428 | |
| 1429 | static void cm_format_rep(struct cm_rep_msg *rep_msg, |
| 1430 | struct cm_id_private *cm_id_priv, |
| 1431 | struct ib_cm_rep_param *param) |
| 1432 | { |
| 1433 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); |
| 1434 | rep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1435 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1436 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
| 1437 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
| 1438 | rep_msg->resp_resources = param->responder_resources; |
| 1439 | rep_msg->initiator_depth = param->initiator_depth; |
| 1440 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); |
| 1441 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
| 1442 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); |
| 1443 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
| 1444 | cm_rep_set_srq(rep_msg, param->srq); |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 1445 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1446 | |
| 1447 | if (param->private_data && param->private_data_len) |
| 1448 | memcpy(rep_msg->private_data, param->private_data, |
| 1449 | param->private_data_len); |
| 1450 | } |
| 1451 | |
| 1452 | int ib_send_cm_rep(struct ib_cm_id *cm_id, |
| 1453 | struct ib_cm_rep_param *param) |
| 1454 | { |
| 1455 | struct cm_id_private *cm_id_priv; |
| 1456 | struct ib_mad_send_buf *msg; |
| 1457 | struct cm_rep_msg *rep_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1458 | unsigned long flags; |
| 1459 | int ret; |
| 1460 | |
| 1461 | if (param->private_data && |
| 1462 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) |
| 1463 | return -EINVAL; |
| 1464 | |
| 1465 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1466 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1467 | if (cm_id->state != IB_CM_REQ_RCVD && |
| 1468 | cm_id->state != IB_CM_MRA_REQ_SENT) { |
| 1469 | ret = -EINVAL; |
| 1470 | goto out; |
| 1471 | } |
| 1472 | |
| 1473 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1474 | if (ret) |
| 1475 | goto out; |
| 1476 | |
| 1477 | rep_msg = (struct cm_rep_msg *) msg->mad; |
| 1478 | cm_format_rep(rep_msg, cm_id_priv, param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1479 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1480 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
| 1481 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1482 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1483 | if (ret) { |
| 1484 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1485 | cm_free_msg(msg); |
| 1486 | return ret; |
| 1487 | } |
| 1488 | |
| 1489 | cm_id->state = IB_CM_REP_SENT; |
| 1490 | cm_id_priv->msg = msg; |
| 1491 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 1492 | cm_id_priv->responder_resources = param->responder_resources; |
| 1493 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1494 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1495 | |
| 1496 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1497 | return ret; |
| 1498 | } |
| 1499 | EXPORT_SYMBOL(ib_send_cm_rep); |
| 1500 | |
| 1501 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, |
| 1502 | struct cm_id_private *cm_id_priv, |
| 1503 | const void *private_data, |
| 1504 | u8 private_data_len) |
| 1505 | { |
| 1506 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); |
| 1507 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1508 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1509 | |
| 1510 | if (private_data && private_data_len) |
| 1511 | memcpy(rtu_msg->private_data, private_data, private_data_len); |
| 1512 | } |
| 1513 | |
| 1514 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, |
| 1515 | const void *private_data, |
| 1516 | u8 private_data_len) |
| 1517 | { |
| 1518 | struct cm_id_private *cm_id_priv; |
| 1519 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1520 | unsigned long flags; |
| 1521 | void *data; |
| 1522 | int ret; |
| 1523 | |
| 1524 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) |
| 1525 | return -EINVAL; |
| 1526 | |
| 1527 | data = cm_copy_private_data(private_data, private_data_len); |
| 1528 | if (IS_ERR(data)) |
| 1529 | return PTR_ERR(data); |
| 1530 | |
| 1531 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1532 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1533 | if (cm_id->state != IB_CM_REP_RCVD && |
| 1534 | cm_id->state != IB_CM_MRA_REP_SENT) { |
| 1535 | ret = -EINVAL; |
| 1536 | goto error; |
| 1537 | } |
| 1538 | |
| 1539 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1540 | if (ret) |
| 1541 | goto error; |
| 1542 | |
| 1543 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1544 | private_data, private_data_len); |
| 1545 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1546 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1547 | if (ret) { |
| 1548 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1549 | cm_free_msg(msg); |
| 1550 | kfree(data); |
| 1551 | return ret; |
| 1552 | } |
| 1553 | |
| 1554 | cm_id->state = IB_CM_ESTABLISHED; |
| 1555 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 1556 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1557 | return 0; |
| 1558 | |
| 1559 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1560 | kfree(data); |
| 1561 | return ret; |
| 1562 | } |
| 1563 | EXPORT_SYMBOL(ib_send_cm_rtu); |
| 1564 | |
| 1565 | static void cm_format_rep_event(struct cm_work *work) |
| 1566 | { |
| 1567 | struct cm_rep_msg *rep_msg; |
| 1568 | struct ib_cm_rep_event_param *param; |
| 1569 | |
| 1570 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1571 | param = &work->cm_event.param.rep_rcvd; |
| 1572 | param->remote_ca_guid = rep_msg->local_ca_guid; |
| 1573 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); |
| 1574 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); |
| 1575 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
| 1576 | param->responder_resources = rep_msg->initiator_depth; |
| 1577 | param->initiator_depth = rep_msg->resp_resources; |
| 1578 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| 1579 | param->failover_accepted = cm_rep_get_failover(rep_msg); |
| 1580 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); |
| 1581 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| 1582 | param->srq = cm_rep_get_srq(rep_msg); |
| 1583 | work->cm_event.private_data = &rep_msg->private_data; |
| 1584 | } |
| 1585 | |
| 1586 | static void cm_dup_rep_handler(struct cm_work *work) |
| 1587 | { |
| 1588 | struct cm_id_private *cm_id_priv; |
| 1589 | struct cm_rep_msg *rep_msg; |
| 1590 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1591 | unsigned long flags; |
| 1592 | int ret; |
| 1593 | |
| 1594 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; |
| 1595 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, |
| 1596 | rep_msg->local_comm_id); |
| 1597 | if (!cm_id_priv) |
| 1598 | return; |
| 1599 | |
| 1600 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1601 | if (ret) |
| 1602 | goto deref; |
| 1603 | |
| 1604 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1605 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
| 1606 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1607 | cm_id_priv->private_data, |
| 1608 | cm_id_priv->private_data_len); |
| 1609 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) |
| 1610 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1611 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, |
| 1612 | cm_id_priv->private_data, |
| 1613 | cm_id_priv->private_data_len); |
| 1614 | else |
| 1615 | goto unlock; |
| 1616 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1617 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1618 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1619 | if (ret) |
| 1620 | goto free; |
| 1621 | goto deref; |
| 1622 | |
| 1623 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1624 | free: cm_free_msg(msg); |
| 1625 | deref: cm_deref_id(cm_id_priv); |
| 1626 | } |
| 1627 | |
| 1628 | static int cm_rep_handler(struct cm_work *work) |
| 1629 | { |
| 1630 | struct cm_id_private *cm_id_priv; |
| 1631 | struct cm_rep_msg *rep_msg; |
| 1632 | unsigned long flags; |
| 1633 | int ret; |
| 1634 | |
| 1635 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1636 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); |
| 1637 | if (!cm_id_priv) { |
| 1638 | cm_dup_rep_handler(work); |
| 1639 | return -EINVAL; |
| 1640 | } |
| 1641 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1642 | cm_format_rep_event(work); |
| 1643 | |
| 1644 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1645 | switch (cm_id_priv->id.state) { |
| 1646 | case IB_CM_REQ_SENT: |
| 1647 | case IB_CM_MRA_REQ_RCVD: |
| 1648 | break; |
| 1649 | default: |
| 1650 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1651 | ret = -EINVAL; |
| 1652 | goto error; |
| 1653 | } |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1654 | |
| 1655 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
| 1656 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; |
| 1657 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1658 | |
| 1659 | spin_lock(&cm.lock); |
| 1660 | /* Check for duplicate REP. */ |
| 1661 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { |
| 1662 | spin_unlock(&cm.lock); |
| 1663 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1664 | ret = -EINVAL; |
| 1665 | goto error; |
| 1666 | } |
| 1667 | /* Check for a stale connection. */ |
| 1668 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { |
| 1669 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
| 1670 | &cm.remote_id_table); |
| 1671 | cm_id_priv->timewait_info->inserted_remote_id = 0; |
| 1672 | spin_unlock(&cm.lock); |
| 1673 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1674 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1675 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, |
| 1676 | NULL, 0); |
| 1677 | ret = -EINVAL; |
| 1678 | goto error; |
| 1679 | } |
| 1680 | spin_unlock(&cm.lock); |
| 1681 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1682 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
| 1683 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; |
| 1684 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1685 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
| 1686 | cm_id_priv->responder_resources = rep_msg->initiator_depth; |
| 1687 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1688 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| 1689 | |
| 1690 | /* todo: handle peer_to_peer */ |
| 1691 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1692 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1693 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1694 | if (!ret) |
| 1695 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1696 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1697 | |
| 1698 | if (ret) |
| 1699 | cm_process_work(cm_id_priv, work); |
| 1700 | else |
| 1701 | cm_deref_id(cm_id_priv); |
| 1702 | return 0; |
| 1703 | |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1704 | error: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1705 | cm_deref_id(cm_id_priv); |
| 1706 | return ret; |
| 1707 | } |
| 1708 | |
| 1709 | static int cm_establish_handler(struct cm_work *work) |
| 1710 | { |
| 1711 | struct cm_id_private *cm_id_priv; |
| 1712 | unsigned long flags; |
| 1713 | int ret; |
| 1714 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1715 | /* See comment in cm_establish about lookup. */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1716 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
| 1717 | if (!cm_id_priv) |
| 1718 | return -EINVAL; |
| 1719 | |
| 1720 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1721 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
| 1722 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1723 | goto out; |
| 1724 | } |
| 1725 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1726 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1727 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1728 | if (!ret) |
| 1729 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1730 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1731 | |
| 1732 | if (ret) |
| 1733 | cm_process_work(cm_id_priv, work); |
| 1734 | else |
| 1735 | cm_deref_id(cm_id_priv); |
| 1736 | return 0; |
| 1737 | out: |
| 1738 | cm_deref_id(cm_id_priv); |
| 1739 | return -EINVAL; |
| 1740 | } |
| 1741 | |
| 1742 | static int cm_rtu_handler(struct cm_work *work) |
| 1743 | { |
| 1744 | struct cm_id_private *cm_id_priv; |
| 1745 | struct cm_rtu_msg *rtu_msg; |
| 1746 | unsigned long flags; |
| 1747 | int ret; |
| 1748 | |
| 1749 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1750 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, |
| 1751 | rtu_msg->local_comm_id); |
| 1752 | if (!cm_id_priv) |
| 1753 | return -EINVAL; |
| 1754 | |
| 1755 | work->cm_event.private_data = &rtu_msg->private_data; |
| 1756 | |
| 1757 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1758 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
| 1759 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { |
| 1760 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1761 | goto out; |
| 1762 | } |
| 1763 | cm_id_priv->id.state = IB_CM_ESTABLISHED; |
| 1764 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1765 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1766 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1767 | if (!ret) |
| 1768 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1769 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1770 | |
| 1771 | if (ret) |
| 1772 | cm_process_work(cm_id_priv, work); |
| 1773 | else |
| 1774 | cm_deref_id(cm_id_priv); |
| 1775 | return 0; |
| 1776 | out: |
| 1777 | cm_deref_id(cm_id_priv); |
| 1778 | return -EINVAL; |
| 1779 | } |
| 1780 | |
| 1781 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, |
| 1782 | struct cm_id_private *cm_id_priv, |
| 1783 | const void *private_data, |
| 1784 | u8 private_data_len) |
| 1785 | { |
| 1786 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, |
| 1787 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); |
| 1788 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1789 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1790 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); |
| 1791 | |
| 1792 | if (private_data && private_data_len) |
| 1793 | memcpy(dreq_msg->private_data, private_data, private_data_len); |
| 1794 | } |
| 1795 | |
| 1796 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, |
| 1797 | const void *private_data, |
| 1798 | u8 private_data_len) |
| 1799 | { |
| 1800 | struct cm_id_private *cm_id_priv; |
| 1801 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1802 | unsigned long flags; |
| 1803 | int ret; |
| 1804 | |
| 1805 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
| 1806 | return -EINVAL; |
| 1807 | |
| 1808 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1809 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1810 | if (cm_id->state != IB_CM_ESTABLISHED) { |
| 1811 | ret = -EINVAL; |
| 1812 | goto out; |
| 1813 | } |
| 1814 | |
| 1815 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1816 | if (ret) { |
| 1817 | cm_enter_timewait(cm_id_priv); |
| 1818 | goto out; |
| 1819 | } |
| 1820 | |
| 1821 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, |
| 1822 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1823 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1824 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
| 1825 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1826 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1827 | if (ret) { |
| 1828 | cm_enter_timewait(cm_id_priv); |
| 1829 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1830 | cm_free_msg(msg); |
| 1831 | return ret; |
| 1832 | } |
| 1833 | |
| 1834 | cm_id->state = IB_CM_DREQ_SENT; |
| 1835 | cm_id_priv->msg = msg; |
| 1836 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1837 | return ret; |
| 1838 | } |
| 1839 | EXPORT_SYMBOL(ib_send_cm_dreq); |
| 1840 | |
| 1841 | static void cm_format_drep(struct cm_drep_msg *drep_msg, |
| 1842 | struct cm_id_private *cm_id_priv, |
| 1843 | const void *private_data, |
| 1844 | u8 private_data_len) |
| 1845 | { |
| 1846 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); |
| 1847 | drep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1848 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1849 | |
| 1850 | if (private_data && private_data_len) |
| 1851 | memcpy(drep_msg->private_data, private_data, private_data_len); |
| 1852 | } |
| 1853 | |
| 1854 | int ib_send_cm_drep(struct ib_cm_id *cm_id, |
| 1855 | const void *private_data, |
| 1856 | u8 private_data_len) |
| 1857 | { |
| 1858 | struct cm_id_private *cm_id_priv; |
| 1859 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1860 | unsigned long flags; |
| 1861 | void *data; |
| 1862 | int ret; |
| 1863 | |
| 1864 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
| 1865 | return -EINVAL; |
| 1866 | |
| 1867 | data = cm_copy_private_data(private_data, private_data_len); |
| 1868 | if (IS_ERR(data)) |
| 1869 | return PTR_ERR(data); |
| 1870 | |
| 1871 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1872 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1873 | if (cm_id->state != IB_CM_DREQ_RCVD) { |
| 1874 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1875 | kfree(data); |
| 1876 | return -EINVAL; |
| 1877 | } |
| 1878 | |
| 1879 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 1880 | cm_enter_timewait(cm_id_priv); |
| 1881 | |
| 1882 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1883 | if (ret) |
| 1884 | goto out; |
| 1885 | |
| 1886 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 1887 | private_data, private_data_len); |
| 1888 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1889 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1890 | if (ret) { |
| 1891 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1892 | cm_free_msg(msg); |
| 1893 | return ret; |
| 1894 | } |
| 1895 | |
| 1896 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1897 | return ret; |
| 1898 | } |
| 1899 | EXPORT_SYMBOL(ib_send_cm_drep); |
| 1900 | |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 1901 | static int cm_issue_drep(struct cm_port *port, |
| 1902 | struct ib_mad_recv_wc *mad_recv_wc) |
| 1903 | { |
| 1904 | struct ib_mad_send_buf *msg = NULL; |
| 1905 | struct cm_dreq_msg *dreq_msg; |
| 1906 | struct cm_drep_msg *drep_msg; |
| 1907 | int ret; |
| 1908 | |
| 1909 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| 1910 | if (ret) |
| 1911 | return ret; |
| 1912 | |
| 1913 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; |
| 1914 | drep_msg = (struct cm_drep_msg *) msg->mad; |
| 1915 | |
| 1916 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); |
| 1917 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; |
| 1918 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; |
| 1919 | |
| 1920 | ret = ib_post_send_mad(msg, NULL); |
| 1921 | if (ret) |
| 1922 | cm_free_msg(msg); |
| 1923 | |
| 1924 | return ret; |
| 1925 | } |
| 1926 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1927 | static int cm_dreq_handler(struct cm_work *work) |
| 1928 | { |
| 1929 | struct cm_id_private *cm_id_priv; |
| 1930 | struct cm_dreq_msg *dreq_msg; |
| 1931 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1932 | unsigned long flags; |
| 1933 | int ret; |
| 1934 | |
| 1935 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1936 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, |
| 1937 | dreq_msg->local_comm_id); |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 1938 | if (!cm_id_priv) { |
| 1939 | cm_issue_drep(work->port, work->mad_recv_wc); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1940 | return -EINVAL; |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 1941 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1942 | |
| 1943 | work->cm_event.private_data = &dreq_msg->private_data; |
| 1944 | |
| 1945 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1946 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
| 1947 | goto unlock; |
| 1948 | |
| 1949 | switch (cm_id_priv->id.state) { |
| 1950 | case IB_CM_REP_SENT: |
| 1951 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1952 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1953 | break; |
| 1954 | case IB_CM_ESTABLISHED: |
| 1955 | case IB_CM_MRA_REP_RCVD: |
| 1956 | break; |
| 1957 | case IB_CM_TIMEWAIT: |
| 1958 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 1959 | goto unlock; |
| 1960 | |
| 1961 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 1962 | cm_id_priv->private_data, |
| 1963 | cm_id_priv->private_data_len); |
| 1964 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1965 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1966 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1967 | cm_free_msg(msg); |
| 1968 | goto deref; |
| 1969 | default: |
| 1970 | goto unlock; |
| 1971 | } |
| 1972 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; |
| 1973 | cm_id_priv->tid = dreq_msg->hdr.tid; |
| 1974 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1975 | if (!ret) |
| 1976 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1977 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1978 | |
| 1979 | if (ret) |
| 1980 | cm_process_work(cm_id_priv, work); |
| 1981 | else |
| 1982 | cm_deref_id(cm_id_priv); |
| 1983 | return 0; |
| 1984 | |
| 1985 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1986 | deref: cm_deref_id(cm_id_priv); |
| 1987 | return -EINVAL; |
| 1988 | } |
| 1989 | |
| 1990 | static int cm_drep_handler(struct cm_work *work) |
| 1991 | { |
| 1992 | struct cm_id_private *cm_id_priv; |
| 1993 | struct cm_drep_msg *drep_msg; |
| 1994 | unsigned long flags; |
| 1995 | int ret; |
| 1996 | |
| 1997 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1998 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, |
| 1999 | drep_msg->local_comm_id); |
| 2000 | if (!cm_id_priv) |
| 2001 | return -EINVAL; |
| 2002 | |
| 2003 | work->cm_event.private_data = &drep_msg->private_data; |
| 2004 | |
| 2005 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2006 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
| 2007 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
| 2008 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2009 | goto out; |
| 2010 | } |
| 2011 | cm_enter_timewait(cm_id_priv); |
| 2012 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2013 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2014 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2015 | if (!ret) |
| 2016 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2017 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2018 | |
| 2019 | if (ret) |
| 2020 | cm_process_work(cm_id_priv, work); |
| 2021 | else |
| 2022 | cm_deref_id(cm_id_priv); |
| 2023 | return 0; |
| 2024 | out: |
| 2025 | cm_deref_id(cm_id_priv); |
| 2026 | return -EINVAL; |
| 2027 | } |
| 2028 | |
| 2029 | int ib_send_cm_rej(struct ib_cm_id *cm_id, |
| 2030 | enum ib_cm_rej_reason reason, |
| 2031 | void *ari, |
| 2032 | u8 ari_length, |
| 2033 | const void *private_data, |
| 2034 | u8 private_data_len) |
| 2035 | { |
| 2036 | struct cm_id_private *cm_id_priv; |
| 2037 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2038 | unsigned long flags; |
| 2039 | int ret; |
| 2040 | |
| 2041 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
| 2042 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) |
| 2043 | return -EINVAL; |
| 2044 | |
| 2045 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2046 | |
| 2047 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2048 | switch (cm_id->state) { |
| 2049 | case IB_CM_REQ_SENT: |
| 2050 | case IB_CM_MRA_REQ_RCVD: |
| 2051 | case IB_CM_REQ_RCVD: |
| 2052 | case IB_CM_MRA_REQ_SENT: |
| 2053 | case IB_CM_REP_RCVD: |
| 2054 | case IB_CM_MRA_REP_SENT: |
| 2055 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2056 | if (!ret) |
| 2057 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 2058 | cm_id_priv, reason, ari, ari_length, |
| 2059 | private_data, private_data_len); |
| 2060 | |
| 2061 | cm_reset_to_idle(cm_id_priv); |
| 2062 | break; |
| 2063 | case IB_CM_REP_SENT: |
| 2064 | case IB_CM_MRA_REP_RCVD: |
| 2065 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2066 | if (!ret) |
| 2067 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 2068 | cm_id_priv, reason, ari, ari_length, |
| 2069 | private_data, private_data_len); |
| 2070 | |
| 2071 | cm_enter_timewait(cm_id_priv); |
| 2072 | break; |
| 2073 | default: |
| 2074 | ret = -EINVAL; |
| 2075 | goto out; |
| 2076 | } |
| 2077 | |
| 2078 | if (ret) |
| 2079 | goto out; |
| 2080 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2081 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2082 | if (ret) |
| 2083 | cm_free_msg(msg); |
| 2084 | |
| 2085 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2086 | return ret; |
| 2087 | } |
| 2088 | EXPORT_SYMBOL(ib_send_cm_rej); |
| 2089 | |
| 2090 | static void cm_format_rej_event(struct cm_work *work) |
| 2091 | { |
| 2092 | struct cm_rej_msg *rej_msg; |
| 2093 | struct ib_cm_rej_event_param *param; |
| 2094 | |
| 2095 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2096 | param = &work->cm_event.param.rej_rcvd; |
| 2097 | param->ari = rej_msg->ari; |
| 2098 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2099 | param->reason = __be16_to_cpu(rej_msg->reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2100 | work->cm_event.private_data = &rej_msg->private_data; |
| 2101 | } |
| 2102 | |
| 2103 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
| 2104 | { |
| 2105 | struct cm_timewait_info *timewait_info; |
| 2106 | struct cm_id_private *cm_id_priv; |
| 2107 | unsigned long flags; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2108 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2109 | |
| 2110 | remote_id = rej_msg->local_comm_id; |
| 2111 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2112 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2113 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2114 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2115 | remote_id); |
| 2116 | if (!timewait_info) { |
| 2117 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2118 | return NULL; |
| 2119 | } |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 2120 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
| 2121 | (timewait_info->work.local_id ^ |
| 2122 | cm.random_id_operand)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2123 | if (cm_id_priv) { |
| 2124 | if (cm_id_priv->id.remote_id == remote_id) |
| 2125 | atomic_inc(&cm_id_priv->refcount); |
| 2126 | else |
| 2127 | cm_id_priv = NULL; |
| 2128 | } |
| 2129 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2130 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
| 2131 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); |
| 2132 | else |
| 2133 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); |
| 2134 | |
| 2135 | return cm_id_priv; |
| 2136 | } |
| 2137 | |
| 2138 | static int cm_rej_handler(struct cm_work *work) |
| 2139 | { |
| 2140 | struct cm_id_private *cm_id_priv; |
| 2141 | struct cm_rej_msg *rej_msg; |
| 2142 | unsigned long flags; |
| 2143 | int ret; |
| 2144 | |
| 2145 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2146 | cm_id_priv = cm_acquire_rejected_id(rej_msg); |
| 2147 | if (!cm_id_priv) |
| 2148 | return -EINVAL; |
| 2149 | |
| 2150 | cm_format_rej_event(work); |
| 2151 | |
| 2152 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2153 | switch (cm_id_priv->id.state) { |
| 2154 | case IB_CM_REQ_SENT: |
| 2155 | case IB_CM_MRA_REQ_RCVD: |
| 2156 | case IB_CM_REP_SENT: |
| 2157 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2158 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2159 | /* fall through */ |
| 2160 | case IB_CM_REQ_RCVD: |
| 2161 | case IB_CM_MRA_REQ_SENT: |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2162 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2163 | cm_enter_timewait(cm_id_priv); |
| 2164 | else |
| 2165 | cm_reset_to_idle(cm_id_priv); |
| 2166 | break; |
| 2167 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2168 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2169 | /* fall through */ |
| 2170 | case IB_CM_REP_RCVD: |
| 2171 | case IB_CM_MRA_REP_SENT: |
| 2172 | case IB_CM_ESTABLISHED: |
| 2173 | cm_enter_timewait(cm_id_priv); |
| 2174 | break; |
| 2175 | default: |
| 2176 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2177 | ret = -EINVAL; |
| 2178 | goto out; |
| 2179 | } |
| 2180 | |
| 2181 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2182 | if (!ret) |
| 2183 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2184 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2185 | |
| 2186 | if (ret) |
| 2187 | cm_process_work(cm_id_priv, work); |
| 2188 | else |
| 2189 | cm_deref_id(cm_id_priv); |
| 2190 | return 0; |
| 2191 | out: |
| 2192 | cm_deref_id(cm_id_priv); |
| 2193 | return -EINVAL; |
| 2194 | } |
| 2195 | |
| 2196 | int ib_send_cm_mra(struct ib_cm_id *cm_id, |
| 2197 | u8 service_timeout, |
| 2198 | const void *private_data, |
| 2199 | u8 private_data_len) |
| 2200 | { |
| 2201 | struct cm_id_private *cm_id_priv; |
| 2202 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2203 | void *data; |
| 2204 | unsigned long flags; |
| 2205 | int ret; |
| 2206 | |
| 2207 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) |
| 2208 | return -EINVAL; |
| 2209 | |
| 2210 | data = cm_copy_private_data(private_data, private_data_len); |
| 2211 | if (IS_ERR(data)) |
| 2212 | return PTR_ERR(data); |
| 2213 | |
| 2214 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2215 | |
| 2216 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2217 | switch(cm_id_priv->id.state) { |
| 2218 | case IB_CM_REQ_RCVD: |
| 2219 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2220 | if (ret) |
| 2221 | goto error1; |
| 2222 | |
| 2223 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2224 | CM_MSG_RESPONSE_REQ, service_timeout, |
| 2225 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2226 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2227 | if (ret) |
| 2228 | goto error2; |
| 2229 | cm_id->state = IB_CM_MRA_REQ_SENT; |
| 2230 | break; |
| 2231 | case IB_CM_REP_RCVD: |
| 2232 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2233 | if (ret) |
| 2234 | goto error1; |
| 2235 | |
| 2236 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2237 | CM_MSG_RESPONSE_REP, service_timeout, |
| 2238 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2239 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2240 | if (ret) |
| 2241 | goto error2; |
| 2242 | cm_id->state = IB_CM_MRA_REP_SENT; |
| 2243 | break; |
| 2244 | case IB_CM_ESTABLISHED: |
| 2245 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2246 | if (ret) |
| 2247 | goto error1; |
| 2248 | |
| 2249 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2250 | CM_MSG_RESPONSE_OTHER, service_timeout, |
| 2251 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2252 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2253 | if (ret) |
| 2254 | goto error2; |
| 2255 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; |
| 2256 | break; |
| 2257 | default: |
| 2258 | ret = -EINVAL; |
| 2259 | goto error1; |
| 2260 | } |
| 2261 | cm_id_priv->service_timeout = service_timeout; |
| 2262 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 2263 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2264 | return 0; |
| 2265 | |
| 2266 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2267 | kfree(data); |
| 2268 | return ret; |
| 2269 | |
| 2270 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2271 | kfree(data); |
| 2272 | cm_free_msg(msg); |
| 2273 | return ret; |
| 2274 | } |
| 2275 | EXPORT_SYMBOL(ib_send_cm_mra); |
| 2276 | |
| 2277 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) |
| 2278 | { |
| 2279 | switch (cm_mra_get_msg_mraed(mra_msg)) { |
| 2280 | case CM_MSG_RESPONSE_REQ: |
| 2281 | return cm_acquire_id(mra_msg->remote_comm_id, 0); |
| 2282 | case CM_MSG_RESPONSE_REP: |
| 2283 | case CM_MSG_RESPONSE_OTHER: |
| 2284 | return cm_acquire_id(mra_msg->remote_comm_id, |
| 2285 | mra_msg->local_comm_id); |
| 2286 | default: |
| 2287 | return NULL; |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | static int cm_mra_handler(struct cm_work *work) |
| 2292 | { |
| 2293 | struct cm_id_private *cm_id_priv; |
| 2294 | struct cm_mra_msg *mra_msg; |
| 2295 | unsigned long flags; |
| 2296 | int timeout, ret; |
| 2297 | |
| 2298 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2299 | cm_id_priv = cm_acquire_mraed_id(mra_msg); |
| 2300 | if (!cm_id_priv) |
| 2301 | return -EINVAL; |
| 2302 | |
| 2303 | work->cm_event.private_data = &mra_msg->private_data; |
| 2304 | work->cm_event.param.mra_rcvd.service_timeout = |
| 2305 | cm_mra_get_service_timeout(mra_msg); |
| 2306 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + |
| 2307 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); |
| 2308 | |
| 2309 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2310 | switch (cm_id_priv->id.state) { |
| 2311 | case IB_CM_REQ_SENT: |
| 2312 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || |
| 2313 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2314 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2315 | goto out; |
| 2316 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; |
| 2317 | break; |
| 2318 | case IB_CM_REP_SENT: |
| 2319 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || |
| 2320 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2321 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2322 | goto out; |
| 2323 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; |
| 2324 | break; |
| 2325 | case IB_CM_ESTABLISHED: |
| 2326 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || |
| 2327 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || |
| 2328 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2329 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2330 | goto out; |
| 2331 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
| 2332 | break; |
| 2333 | default: |
| 2334 | goto out; |
| 2335 | } |
| 2336 | |
| 2337 | cm_id_priv->msg->context[1] = (void *) (unsigned long) |
| 2338 | cm_id_priv->id.state; |
| 2339 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2340 | if (!ret) |
| 2341 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2342 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2343 | |
| 2344 | if (ret) |
| 2345 | cm_process_work(cm_id_priv, work); |
| 2346 | else |
| 2347 | cm_deref_id(cm_id_priv); |
| 2348 | return 0; |
| 2349 | out: |
| 2350 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2351 | cm_deref_id(cm_id_priv); |
| 2352 | return -EINVAL; |
| 2353 | } |
| 2354 | |
| 2355 | static void cm_format_lap(struct cm_lap_msg *lap_msg, |
| 2356 | struct cm_id_private *cm_id_priv, |
| 2357 | struct ib_sa_path_rec *alternate_path, |
| 2358 | const void *private_data, |
| 2359 | u8 private_data_len) |
| 2360 | { |
| 2361 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, |
| 2362 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); |
| 2363 | lap_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2364 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2365 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); |
| 2366 | /* todo: need remote CM response timeout */ |
| 2367 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); |
| 2368 | lap_msg->alt_local_lid = alternate_path->slid; |
| 2369 | lap_msg->alt_remote_lid = alternate_path->dlid; |
| 2370 | lap_msg->alt_local_gid = alternate_path->sgid; |
| 2371 | lap_msg->alt_remote_gid = alternate_path->dgid; |
| 2372 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); |
| 2373 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); |
| 2374 | lap_msg->alt_hop_limit = alternate_path->hop_limit; |
| 2375 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); |
| 2376 | cm_lap_set_sl(lap_msg, alternate_path->sl); |
| 2377 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ |
| 2378 | cm_lap_set_local_ack_timeout(lap_msg, |
| 2379 | min(31, alternate_path->packet_life_time + 1)); |
| 2380 | |
| 2381 | if (private_data && private_data_len) |
| 2382 | memcpy(lap_msg->private_data, private_data, private_data_len); |
| 2383 | } |
| 2384 | |
| 2385 | int ib_send_cm_lap(struct ib_cm_id *cm_id, |
| 2386 | struct ib_sa_path_rec *alternate_path, |
| 2387 | const void *private_data, |
| 2388 | u8 private_data_len) |
| 2389 | { |
| 2390 | struct cm_id_private *cm_id_priv; |
| 2391 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2392 | unsigned long flags; |
| 2393 | int ret; |
| 2394 | |
| 2395 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) |
| 2396 | return -EINVAL; |
| 2397 | |
| 2398 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2399 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2400 | if (cm_id->state != IB_CM_ESTABLISHED || |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2401 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
| 2402 | cm_id->lap_state != IB_CM_LAP_IDLE)) { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2403 | ret = -EINVAL; |
| 2404 | goto out; |
| 2405 | } |
| 2406 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2407 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
| 2408 | if (ret) |
| 2409 | goto out; |
| 2410 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2411 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2412 | if (ret) |
| 2413 | goto out; |
| 2414 | |
| 2415 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, |
| 2416 | alternate_path, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2417 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2418 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
| 2419 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2420 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2421 | if (ret) { |
| 2422 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2423 | cm_free_msg(msg); |
| 2424 | return ret; |
| 2425 | } |
| 2426 | |
| 2427 | cm_id->lap_state = IB_CM_LAP_SENT; |
| 2428 | cm_id_priv->msg = msg; |
| 2429 | |
| 2430 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2431 | return ret; |
| 2432 | } |
| 2433 | EXPORT_SYMBOL(ib_send_cm_lap); |
| 2434 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2435 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
| 2436 | struct ib_sa_path_rec *path, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2437 | struct cm_lap_msg *lap_msg) |
| 2438 | { |
| 2439 | memset(path, 0, sizeof *path); |
| 2440 | path->dgid = lap_msg->alt_local_gid; |
| 2441 | path->sgid = lap_msg->alt_remote_gid; |
| 2442 | path->dlid = lap_msg->alt_local_lid; |
| 2443 | path->slid = lap_msg->alt_remote_lid; |
| 2444 | path->flow_label = cm_lap_get_flow_label(lap_msg); |
| 2445 | path->hop_limit = lap_msg->alt_hop_limit; |
| 2446 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); |
| 2447 | path->reversible = 1; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2448 | path->pkey = cm_id_priv->pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2449 | path->sl = cm_lap_get_sl(lap_msg); |
| 2450 | path->mtu_selector = IB_SA_EQ; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2451 | path->mtu = cm_id_priv->path_mtu; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2452 | path->rate_selector = IB_SA_EQ; |
| 2453 | path->rate = cm_lap_get_packet_rate(lap_msg); |
| 2454 | path->packet_life_time_selector = IB_SA_EQ; |
| 2455 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); |
| 2456 | path->packet_life_time -= (path->packet_life_time > 0); |
| 2457 | } |
| 2458 | |
| 2459 | static int cm_lap_handler(struct cm_work *work) |
| 2460 | { |
| 2461 | struct cm_id_private *cm_id_priv; |
| 2462 | struct cm_lap_msg *lap_msg; |
| 2463 | struct ib_cm_lap_event_param *param; |
| 2464 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2465 | unsigned long flags; |
| 2466 | int ret; |
| 2467 | |
| 2468 | /* todo: verify LAP request and send reject APR if invalid. */ |
| 2469 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2470 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, |
| 2471 | lap_msg->local_comm_id); |
| 2472 | if (!cm_id_priv) |
| 2473 | return -EINVAL; |
| 2474 | |
| 2475 | param = &work->cm_event.param.lap_rcvd; |
| 2476 | param->alternate_path = &work->path[0]; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2477 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2478 | work->cm_event.private_data = &lap_msg->private_data; |
| 2479 | |
| 2480 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2481 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
| 2482 | goto unlock; |
| 2483 | |
| 2484 | switch (cm_id_priv->id.lap_state) { |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2485 | case IB_CM_LAP_UNINIT: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2486 | case IB_CM_LAP_IDLE: |
| 2487 | break; |
| 2488 | case IB_CM_MRA_LAP_SENT: |
| 2489 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 2490 | goto unlock; |
| 2491 | |
| 2492 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2493 | CM_MSG_RESPONSE_OTHER, |
| 2494 | cm_id_priv->service_timeout, |
| 2495 | cm_id_priv->private_data, |
| 2496 | cm_id_priv->private_data_len); |
| 2497 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2498 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2499 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2500 | cm_free_msg(msg); |
| 2501 | goto deref; |
| 2502 | default: |
| 2503 | goto unlock; |
| 2504 | } |
| 2505 | |
| 2506 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; |
| 2507 | cm_id_priv->tid = lap_msg->hdr.tid; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2508 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| 2509 | work->mad_recv_wc->recv_buf.grh, |
| 2510 | &cm_id_priv->av); |
| 2511 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2512 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2513 | if (!ret) |
| 2514 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2515 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2516 | |
| 2517 | if (ret) |
| 2518 | cm_process_work(cm_id_priv, work); |
| 2519 | else |
| 2520 | cm_deref_id(cm_id_priv); |
| 2521 | return 0; |
| 2522 | |
| 2523 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2524 | deref: cm_deref_id(cm_id_priv); |
| 2525 | return -EINVAL; |
| 2526 | } |
| 2527 | |
| 2528 | static void cm_format_apr(struct cm_apr_msg *apr_msg, |
| 2529 | struct cm_id_private *cm_id_priv, |
| 2530 | enum ib_cm_apr_status status, |
| 2531 | void *info, |
| 2532 | u8 info_length, |
| 2533 | const void *private_data, |
| 2534 | u8 private_data_len) |
| 2535 | { |
| 2536 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); |
| 2537 | apr_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2538 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2539 | apr_msg->ap_status = (u8) status; |
| 2540 | |
| 2541 | if (info && info_length) { |
| 2542 | apr_msg->info_length = info_length; |
| 2543 | memcpy(apr_msg->info, info, info_length); |
| 2544 | } |
| 2545 | |
| 2546 | if (private_data && private_data_len) |
| 2547 | memcpy(apr_msg->private_data, private_data, private_data_len); |
| 2548 | } |
| 2549 | |
| 2550 | int ib_send_cm_apr(struct ib_cm_id *cm_id, |
| 2551 | enum ib_cm_apr_status status, |
| 2552 | void *info, |
| 2553 | u8 info_length, |
| 2554 | const void *private_data, |
| 2555 | u8 private_data_len) |
| 2556 | { |
| 2557 | struct cm_id_private *cm_id_priv; |
| 2558 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2559 | unsigned long flags; |
| 2560 | int ret; |
| 2561 | |
| 2562 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || |
| 2563 | (info && info_length > IB_CM_APR_INFO_LENGTH)) |
| 2564 | return -EINVAL; |
| 2565 | |
| 2566 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2567 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2568 | if (cm_id->state != IB_CM_ESTABLISHED || |
| 2569 | (cm_id->lap_state != IB_CM_LAP_RCVD && |
| 2570 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { |
| 2571 | ret = -EINVAL; |
| 2572 | goto out; |
| 2573 | } |
| 2574 | |
| 2575 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2576 | if (ret) |
| 2577 | goto out; |
| 2578 | |
| 2579 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, |
| 2580 | info, info_length, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2581 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2582 | if (ret) { |
| 2583 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2584 | cm_free_msg(msg); |
| 2585 | return ret; |
| 2586 | } |
| 2587 | |
| 2588 | cm_id->lap_state = IB_CM_LAP_IDLE; |
| 2589 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2590 | return ret; |
| 2591 | } |
| 2592 | EXPORT_SYMBOL(ib_send_cm_apr); |
| 2593 | |
| 2594 | static int cm_apr_handler(struct cm_work *work) |
| 2595 | { |
| 2596 | struct cm_id_private *cm_id_priv; |
| 2597 | struct cm_apr_msg *apr_msg; |
| 2598 | unsigned long flags; |
| 2599 | int ret; |
| 2600 | |
| 2601 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2602 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, |
| 2603 | apr_msg->local_comm_id); |
| 2604 | if (!cm_id_priv) |
| 2605 | return -EINVAL; /* Unmatched reply. */ |
| 2606 | |
| 2607 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; |
| 2608 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; |
| 2609 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; |
| 2610 | work->cm_event.private_data = &apr_msg->private_data; |
| 2611 | |
| 2612 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2613 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
| 2614 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && |
| 2615 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { |
| 2616 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2617 | goto out; |
| 2618 | } |
| 2619 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2620 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2621 | cm_id_priv->msg = NULL; |
| 2622 | |
| 2623 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2624 | if (!ret) |
| 2625 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2626 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2627 | |
| 2628 | if (ret) |
| 2629 | cm_process_work(cm_id_priv, work); |
| 2630 | else |
| 2631 | cm_deref_id(cm_id_priv); |
| 2632 | return 0; |
| 2633 | out: |
| 2634 | cm_deref_id(cm_id_priv); |
| 2635 | return -EINVAL; |
| 2636 | } |
| 2637 | |
| 2638 | static int cm_timewait_handler(struct cm_work *work) |
| 2639 | { |
| 2640 | struct cm_timewait_info *timewait_info; |
| 2641 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2642 | int ret; |
| 2643 | |
| 2644 | timewait_info = (struct cm_timewait_info *)work; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2645 | spin_lock_irq(&cm.lock); |
| 2646 | list_del(&timewait_info->list); |
| 2647 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2648 | |
| 2649 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
| 2650 | timewait_info->work.remote_id); |
| 2651 | if (!cm_id_priv) |
| 2652 | return -EINVAL; |
| 2653 | |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2654 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2655 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
| 2656 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2657 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2658 | goto out; |
| 2659 | } |
| 2660 | cm_id_priv->id.state = IB_CM_IDLE; |
| 2661 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2662 | if (!ret) |
| 2663 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2664 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2665 | |
| 2666 | if (ret) |
| 2667 | cm_process_work(cm_id_priv, work); |
| 2668 | else |
| 2669 | cm_deref_id(cm_id_priv); |
| 2670 | return 0; |
| 2671 | out: |
| 2672 | cm_deref_id(cm_id_priv); |
| 2673 | return -EINVAL; |
| 2674 | } |
| 2675 | |
| 2676 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, |
| 2677 | struct cm_id_private *cm_id_priv, |
| 2678 | struct ib_cm_sidr_req_param *param) |
| 2679 | { |
| 2680 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, |
| 2681 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); |
| 2682 | sidr_req_msg->request_id = cm_id_priv->id.local_id; |
Sean Hefty | 75af908 | 2006-06-17 20:37:39 -0700 | [diff] [blame] | 2683 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2684 | sidr_req_msg->service_id = param->service_id; |
| 2685 | |
| 2686 | if (param->private_data && param->private_data_len) |
| 2687 | memcpy(sidr_req_msg->private_data, param->private_data, |
| 2688 | param->private_data_len); |
| 2689 | } |
| 2690 | |
| 2691 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, |
| 2692 | struct ib_cm_sidr_req_param *param) |
| 2693 | { |
| 2694 | struct cm_id_private *cm_id_priv; |
| 2695 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2696 | unsigned long flags; |
| 2697 | int ret; |
| 2698 | |
| 2699 | if (!param->path || (param->private_data && |
| 2700 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) |
| 2701 | return -EINVAL; |
| 2702 | |
| 2703 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2704 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); |
| 2705 | if (ret) |
| 2706 | goto out; |
| 2707 | |
| 2708 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2709 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2710 | cm_id_priv->timeout_ms = param->timeout_ms; |
| 2711 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 2712 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2713 | if (ret) |
| 2714 | goto out; |
| 2715 | |
| 2716 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, |
| 2717 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2718 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2719 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
| 2720 | |
| 2721 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2722 | if (cm_id->state == IB_CM_IDLE) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2723 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2724 | else |
| 2725 | ret = -EINVAL; |
| 2726 | |
| 2727 | if (ret) { |
| 2728 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2729 | cm_free_msg(msg); |
| 2730 | goto out; |
| 2731 | } |
| 2732 | cm_id->state = IB_CM_SIDR_REQ_SENT; |
| 2733 | cm_id_priv->msg = msg; |
| 2734 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2735 | out: |
| 2736 | return ret; |
| 2737 | } |
| 2738 | EXPORT_SYMBOL(ib_send_cm_sidr_req); |
| 2739 | |
| 2740 | static void cm_format_sidr_req_event(struct cm_work *work, |
| 2741 | struct ib_cm_id *listen_id) |
| 2742 | { |
| 2743 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2744 | struct ib_cm_sidr_req_event_param *param; |
| 2745 | |
| 2746 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2747 | work->mad_recv_wc->recv_buf.mad; |
| 2748 | param = &work->cm_event.param.sidr_req_rcvd; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2749 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2750 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2751 | param->port = work->port->port_num; |
| 2752 | work->cm_event.private_data = &sidr_req_msg->private_data; |
| 2753 | } |
| 2754 | |
| 2755 | static int cm_sidr_req_handler(struct cm_work *work) |
| 2756 | { |
| 2757 | struct ib_cm_id *cm_id; |
| 2758 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 2759 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2760 | struct ib_wc *wc; |
| 2761 | unsigned long flags; |
| 2762 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2763 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2764 | if (IS_ERR(cm_id)) |
| 2765 | return PTR_ERR(cm_id); |
| 2766 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2767 | |
| 2768 | /* Record SGID/SLID and request ID for lookup. */ |
| 2769 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2770 | work->mad_recv_wc->recv_buf.mad; |
| 2771 | wc = work->mad_recv_wc->wc; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2772 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2773 | cm_id_priv->av.dgid.global.interface_id = 0; |
| 2774 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 2775 | work->mad_recv_wc->recv_buf.grh, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2776 | &cm_id_priv->av); |
| 2777 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; |
| 2778 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
| 2779 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
| 2780 | atomic_inc(&cm_id_priv->work_count); |
| 2781 | |
| 2782 | spin_lock_irqsave(&cm.lock, flags); |
| 2783 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
| 2784 | if (cur_cm_id_priv) { |
| 2785 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2786 | goto out; /* Duplicate message. */ |
| 2787 | } |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2788 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 2789 | sidr_req_msg->service_id, |
| 2790 | sidr_req_msg->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2791 | if (!cur_cm_id_priv) { |
| 2792 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 2793 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2794 | /* todo: reply with no match */ |
| 2795 | goto out; /* No match. */ |
| 2796 | } |
| 2797 | atomic_inc(&cur_cm_id_priv->refcount); |
| 2798 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2799 | |
| 2800 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; |
| 2801 | cm_id_priv->id.context = cur_cm_id_priv->id.context; |
| 2802 | cm_id_priv->id.service_id = sidr_req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2803 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2804 | |
| 2805 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); |
| 2806 | cm_process_work(cm_id_priv, work); |
| 2807 | cm_deref_id(cur_cm_id_priv); |
| 2808 | return 0; |
| 2809 | out: |
| 2810 | ib_destroy_cm_id(&cm_id_priv->id); |
| 2811 | return -EINVAL; |
| 2812 | } |
| 2813 | |
| 2814 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, |
| 2815 | struct cm_id_private *cm_id_priv, |
| 2816 | struct ib_cm_sidr_rep_param *param) |
| 2817 | { |
| 2818 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
| 2819 | cm_id_priv->tid); |
| 2820 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; |
| 2821 | sidr_rep_msg->status = param->status; |
| 2822 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); |
| 2823 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; |
| 2824 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); |
| 2825 | |
| 2826 | if (param->info && param->info_length) |
| 2827 | memcpy(sidr_rep_msg->info, param->info, param->info_length); |
| 2828 | |
| 2829 | if (param->private_data && param->private_data_len) |
| 2830 | memcpy(sidr_rep_msg->private_data, param->private_data, |
| 2831 | param->private_data_len); |
| 2832 | } |
| 2833 | |
| 2834 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
| 2835 | struct ib_cm_sidr_rep_param *param) |
| 2836 | { |
| 2837 | struct cm_id_private *cm_id_priv; |
| 2838 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2839 | unsigned long flags; |
| 2840 | int ret; |
| 2841 | |
| 2842 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || |
| 2843 | (param->private_data && |
| 2844 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) |
| 2845 | return -EINVAL; |
| 2846 | |
| 2847 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2848 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2849 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { |
| 2850 | ret = -EINVAL; |
| 2851 | goto error; |
| 2852 | } |
| 2853 | |
| 2854 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2855 | if (ret) |
| 2856 | goto error; |
| 2857 | |
| 2858 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, |
| 2859 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2860 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2861 | if (ret) { |
| 2862 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2863 | cm_free_msg(msg); |
| 2864 | return ret; |
| 2865 | } |
| 2866 | cm_id->state = IB_CM_IDLE; |
| 2867 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2868 | |
| 2869 | spin_lock_irqsave(&cm.lock, flags); |
| 2870 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 2871 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2872 | return 0; |
| 2873 | |
| 2874 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2875 | return ret; |
| 2876 | } |
| 2877 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); |
| 2878 | |
| 2879 | static void cm_format_sidr_rep_event(struct cm_work *work) |
| 2880 | { |
| 2881 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 2882 | struct ib_cm_sidr_rep_event_param *param; |
| 2883 | |
| 2884 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 2885 | work->mad_recv_wc->recv_buf.mad; |
| 2886 | param = &work->cm_event.param.sidr_rep_rcvd; |
| 2887 | param->status = sidr_rep_msg->status; |
| 2888 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); |
| 2889 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); |
| 2890 | param->info = &sidr_rep_msg->info; |
| 2891 | param->info_len = sidr_rep_msg->info_length; |
| 2892 | work->cm_event.private_data = &sidr_rep_msg->private_data; |
| 2893 | } |
| 2894 | |
| 2895 | static int cm_sidr_rep_handler(struct cm_work *work) |
| 2896 | { |
| 2897 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 2898 | struct cm_id_private *cm_id_priv; |
| 2899 | unsigned long flags; |
| 2900 | |
| 2901 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 2902 | work->mad_recv_wc->recv_buf.mad; |
| 2903 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); |
| 2904 | if (!cm_id_priv) |
| 2905 | return -EINVAL; /* Unmatched reply. */ |
| 2906 | |
| 2907 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2908 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
| 2909 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2910 | goto out; |
| 2911 | } |
| 2912 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2913 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2914 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2915 | |
| 2916 | cm_format_sidr_rep_event(work); |
| 2917 | cm_process_work(cm_id_priv, work); |
| 2918 | return 0; |
| 2919 | out: |
| 2920 | cm_deref_id(cm_id_priv); |
| 2921 | return -EINVAL; |
| 2922 | } |
| 2923 | |
| 2924 | static void cm_process_send_error(struct ib_mad_send_buf *msg, |
| 2925 | enum ib_wc_status wc_status) |
| 2926 | { |
| 2927 | struct cm_id_private *cm_id_priv; |
| 2928 | struct ib_cm_event cm_event; |
| 2929 | enum ib_cm_state state; |
| 2930 | unsigned long flags; |
| 2931 | int ret; |
| 2932 | |
| 2933 | memset(&cm_event, 0, sizeof cm_event); |
| 2934 | cm_id_priv = msg->context[0]; |
| 2935 | |
| 2936 | /* Discard old sends or ones without a response. */ |
| 2937 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2938 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
| 2939 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) |
| 2940 | goto discard; |
| 2941 | |
| 2942 | switch (state) { |
| 2943 | case IB_CM_REQ_SENT: |
| 2944 | case IB_CM_MRA_REQ_RCVD: |
| 2945 | cm_reset_to_idle(cm_id_priv); |
| 2946 | cm_event.event = IB_CM_REQ_ERROR; |
| 2947 | break; |
| 2948 | case IB_CM_REP_SENT: |
| 2949 | case IB_CM_MRA_REP_RCVD: |
| 2950 | cm_reset_to_idle(cm_id_priv); |
| 2951 | cm_event.event = IB_CM_REP_ERROR; |
| 2952 | break; |
| 2953 | case IB_CM_DREQ_SENT: |
| 2954 | cm_enter_timewait(cm_id_priv); |
| 2955 | cm_event.event = IB_CM_DREQ_ERROR; |
| 2956 | break; |
| 2957 | case IB_CM_SIDR_REQ_SENT: |
| 2958 | cm_id_priv->id.state = IB_CM_IDLE; |
| 2959 | cm_event.event = IB_CM_SIDR_REQ_ERROR; |
| 2960 | break; |
| 2961 | default: |
| 2962 | goto discard; |
| 2963 | } |
| 2964 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2965 | cm_event.param.send_status = wc_status; |
| 2966 | |
| 2967 | /* No other events can occur on the cm_id at this point. */ |
| 2968 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); |
| 2969 | cm_free_msg(msg); |
| 2970 | if (ret) |
| 2971 | ib_destroy_cm_id(&cm_id_priv->id); |
| 2972 | return; |
| 2973 | discard: |
| 2974 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2975 | cm_free_msg(msg); |
| 2976 | } |
| 2977 | |
| 2978 | static void cm_send_handler(struct ib_mad_agent *mad_agent, |
| 2979 | struct ib_mad_send_wc *mad_send_wc) |
| 2980 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2981 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2982 | |
| 2983 | switch (mad_send_wc->status) { |
| 2984 | case IB_WC_SUCCESS: |
| 2985 | case IB_WC_WR_FLUSH_ERR: |
| 2986 | cm_free_msg(msg); |
| 2987 | break; |
| 2988 | default: |
| 2989 | if (msg->context[0] && msg->context[1]) |
| 2990 | cm_process_send_error(msg, mad_send_wc->status); |
| 2991 | else |
| 2992 | cm_free_msg(msg); |
| 2993 | break; |
| 2994 | } |
| 2995 | } |
| 2996 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2997 | static void cm_work_handler(struct work_struct *_work) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2998 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2999 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3000 | int ret; |
| 3001 | |
| 3002 | switch (work->cm_event.event) { |
| 3003 | case IB_CM_REQ_RECEIVED: |
| 3004 | ret = cm_req_handler(work); |
| 3005 | break; |
| 3006 | case IB_CM_MRA_RECEIVED: |
| 3007 | ret = cm_mra_handler(work); |
| 3008 | break; |
| 3009 | case IB_CM_REJ_RECEIVED: |
| 3010 | ret = cm_rej_handler(work); |
| 3011 | break; |
| 3012 | case IB_CM_REP_RECEIVED: |
| 3013 | ret = cm_rep_handler(work); |
| 3014 | break; |
| 3015 | case IB_CM_RTU_RECEIVED: |
| 3016 | ret = cm_rtu_handler(work); |
| 3017 | break; |
| 3018 | case IB_CM_USER_ESTABLISHED: |
| 3019 | ret = cm_establish_handler(work); |
| 3020 | break; |
| 3021 | case IB_CM_DREQ_RECEIVED: |
| 3022 | ret = cm_dreq_handler(work); |
| 3023 | break; |
| 3024 | case IB_CM_DREP_RECEIVED: |
| 3025 | ret = cm_drep_handler(work); |
| 3026 | break; |
| 3027 | case IB_CM_SIDR_REQ_RECEIVED: |
| 3028 | ret = cm_sidr_req_handler(work); |
| 3029 | break; |
| 3030 | case IB_CM_SIDR_REP_RECEIVED: |
| 3031 | ret = cm_sidr_rep_handler(work); |
| 3032 | break; |
| 3033 | case IB_CM_LAP_RECEIVED: |
| 3034 | ret = cm_lap_handler(work); |
| 3035 | break; |
| 3036 | case IB_CM_APR_RECEIVED: |
| 3037 | ret = cm_apr_handler(work); |
| 3038 | break; |
| 3039 | case IB_CM_TIMEWAIT_EXIT: |
| 3040 | ret = cm_timewait_handler(work); |
| 3041 | break; |
| 3042 | default: |
| 3043 | ret = -EINVAL; |
| 3044 | break; |
| 3045 | } |
| 3046 | if (ret) |
| 3047 | cm_free_work(work); |
| 3048 | } |
| 3049 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3050 | static int cm_establish(struct ib_cm_id *cm_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3051 | { |
| 3052 | struct cm_id_private *cm_id_priv; |
| 3053 | struct cm_work *work; |
| 3054 | unsigned long flags; |
| 3055 | int ret = 0; |
| 3056 | |
| 3057 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
| 3058 | if (!work) |
| 3059 | return -ENOMEM; |
| 3060 | |
| 3061 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3062 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3063 | switch (cm_id->state) |
| 3064 | { |
| 3065 | case IB_CM_REP_SENT: |
| 3066 | case IB_CM_MRA_REP_RCVD: |
| 3067 | cm_id->state = IB_CM_ESTABLISHED; |
| 3068 | break; |
| 3069 | case IB_CM_ESTABLISHED: |
| 3070 | ret = -EISCONN; |
| 3071 | break; |
| 3072 | default: |
| 3073 | ret = -EINVAL; |
| 3074 | break; |
| 3075 | } |
| 3076 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3077 | |
| 3078 | if (ret) { |
| 3079 | kfree(work); |
| 3080 | goto out; |
| 3081 | } |
| 3082 | |
| 3083 | /* |
| 3084 | * The CM worker thread may try to destroy the cm_id before it |
| 3085 | * can execute this work item. To prevent potential deadlock, |
| 3086 | * we need to find the cm_id once we're in the context of the |
| 3087 | * worker thread, rather than holding a reference on it. |
| 3088 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3089 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3090 | work->local_id = cm_id->local_id; |
| 3091 | work->remote_id = cm_id->remote_id; |
| 3092 | work->mad_recv_wc = NULL; |
| 3093 | work->cm_event.event = IB_CM_USER_ESTABLISHED; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3094 | queue_delayed_work(cm.wq, &work->work, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3095 | out: |
| 3096 | return ret; |
| 3097 | } |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3098 | |
| 3099 | static int cm_migrate(struct ib_cm_id *cm_id) |
| 3100 | { |
| 3101 | struct cm_id_private *cm_id_priv; |
| 3102 | unsigned long flags; |
| 3103 | int ret = 0; |
| 3104 | |
| 3105 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3106 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3107 | if (cm_id->state == IB_CM_ESTABLISHED && |
| 3108 | (cm_id->lap_state == IB_CM_LAP_UNINIT || |
| 3109 | cm_id->lap_state == IB_CM_LAP_IDLE)) { |
| 3110 | cm_id->lap_state = IB_CM_LAP_IDLE; |
| 3111 | cm_id_priv->av = cm_id_priv->alt_av; |
| 3112 | } else |
| 3113 | ret = -EINVAL; |
| 3114 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3115 | |
| 3116 | return ret; |
| 3117 | } |
| 3118 | |
| 3119 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) |
| 3120 | { |
| 3121 | int ret; |
| 3122 | |
| 3123 | switch (event) { |
| 3124 | case IB_EVENT_COMM_EST: |
| 3125 | ret = cm_establish(cm_id); |
| 3126 | break; |
| 3127 | case IB_EVENT_PATH_MIG: |
| 3128 | ret = cm_migrate(cm_id); |
| 3129 | break; |
| 3130 | default: |
| 3131 | ret = -EINVAL; |
| 3132 | } |
| 3133 | return ret; |
| 3134 | } |
| 3135 | EXPORT_SYMBOL(ib_cm_notify); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3136 | |
| 3137 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, |
| 3138 | struct ib_mad_recv_wc *mad_recv_wc) |
| 3139 | { |
| 3140 | struct cm_work *work; |
| 3141 | enum ib_cm_event_type event; |
| 3142 | int paths = 0; |
| 3143 | |
| 3144 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { |
| 3145 | case CM_REQ_ATTR_ID: |
| 3146 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> |
| 3147 | alt_local_lid != 0); |
| 3148 | event = IB_CM_REQ_RECEIVED; |
| 3149 | break; |
| 3150 | case CM_MRA_ATTR_ID: |
| 3151 | event = IB_CM_MRA_RECEIVED; |
| 3152 | break; |
| 3153 | case CM_REJ_ATTR_ID: |
| 3154 | event = IB_CM_REJ_RECEIVED; |
| 3155 | break; |
| 3156 | case CM_REP_ATTR_ID: |
| 3157 | event = IB_CM_REP_RECEIVED; |
| 3158 | break; |
| 3159 | case CM_RTU_ATTR_ID: |
| 3160 | event = IB_CM_RTU_RECEIVED; |
| 3161 | break; |
| 3162 | case CM_DREQ_ATTR_ID: |
| 3163 | event = IB_CM_DREQ_RECEIVED; |
| 3164 | break; |
| 3165 | case CM_DREP_ATTR_ID: |
| 3166 | event = IB_CM_DREP_RECEIVED; |
| 3167 | break; |
| 3168 | case CM_SIDR_REQ_ATTR_ID: |
| 3169 | event = IB_CM_SIDR_REQ_RECEIVED; |
| 3170 | break; |
| 3171 | case CM_SIDR_REP_ATTR_ID: |
| 3172 | event = IB_CM_SIDR_REP_RECEIVED; |
| 3173 | break; |
| 3174 | case CM_LAP_ATTR_ID: |
| 3175 | paths = 1; |
| 3176 | event = IB_CM_LAP_RECEIVED; |
| 3177 | break; |
| 3178 | case CM_APR_ATTR_ID: |
| 3179 | event = IB_CM_APR_RECEIVED; |
| 3180 | break; |
| 3181 | default: |
| 3182 | ib_free_recv_mad(mad_recv_wc); |
| 3183 | return; |
| 3184 | } |
| 3185 | |
| 3186 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
| 3187 | GFP_KERNEL); |
| 3188 | if (!work) { |
| 3189 | ib_free_recv_mad(mad_recv_wc); |
| 3190 | return; |
| 3191 | } |
| 3192 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3193 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3194 | work->cm_event.event = event; |
| 3195 | work->mad_recv_wc = mad_recv_wc; |
| 3196 | work->port = (struct cm_port *)mad_agent->context; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3197 | queue_delayed_work(cm.wq, &work->work, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3198 | } |
| 3199 | |
| 3200 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, |
| 3201 | struct ib_qp_attr *qp_attr, |
| 3202 | int *qp_attr_mask) |
| 3203 | { |
| 3204 | unsigned long flags; |
| 3205 | int ret; |
| 3206 | |
| 3207 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3208 | switch (cm_id_priv->id.state) { |
| 3209 | case IB_CM_REQ_SENT: |
| 3210 | case IB_CM_MRA_REQ_RCVD: |
| 3211 | case IB_CM_REQ_RCVD: |
| 3212 | case IB_CM_MRA_REQ_SENT: |
| 3213 | case IB_CM_REP_RCVD: |
| 3214 | case IB_CM_MRA_REP_SENT: |
| 3215 | case IB_CM_REP_SENT: |
| 3216 | case IB_CM_MRA_REP_RCVD: |
| 3217 | case IB_CM_ESTABLISHED: |
| 3218 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | |
| 3219 | IB_QP_PKEY_INDEX | IB_QP_PORT; |
Dotan Barak | e31353e | 2006-10-24 13:35:27 -0700 | [diff] [blame] | 3220 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3221 | if (cm_id_priv->responder_resources) |
Sean Hefty | c1f250c | 2006-08-28 11:55:52 -0700 | [diff] [blame] | 3222 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
| 3223 | IB_ACCESS_REMOTE_ATOMIC; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3224 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
| 3225 | qp_attr->port_num = cm_id_priv->av.port->port_num; |
| 3226 | ret = 0; |
| 3227 | break; |
| 3228 | default: |
| 3229 | ret = -EINVAL; |
| 3230 | break; |
| 3231 | } |
| 3232 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3233 | return ret; |
| 3234 | } |
| 3235 | |
| 3236 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, |
| 3237 | struct ib_qp_attr *qp_attr, |
| 3238 | int *qp_attr_mask) |
| 3239 | { |
| 3240 | unsigned long flags; |
| 3241 | int ret; |
| 3242 | |
| 3243 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3244 | switch (cm_id_priv->id.state) { |
| 3245 | case IB_CM_REQ_RCVD: |
| 3246 | case IB_CM_MRA_REQ_SENT: |
| 3247 | case IB_CM_REP_RCVD: |
| 3248 | case IB_CM_MRA_REP_SENT: |
| 3249 | case IB_CM_REP_SENT: |
| 3250 | case IB_CM_MRA_REP_RCVD: |
| 3251 | case IB_CM_ESTABLISHED: |
| 3252 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3253 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3254 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
| 3255 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
| 3256 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); |
| 3257 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3258 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3259 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
| 3260 | IB_QP_MIN_RNR_TIMER; |
| 3261 | qp_attr->max_dest_rd_atomic = |
| 3262 | cm_id_priv->responder_resources; |
| 3263 | qp_attr->min_rnr_timer = 0; |
| 3264 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3265 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3266 | *qp_attr_mask |= IB_QP_ALT_PATH; |
Sean Hefty | 0d8fdfd | 2006-06-30 14:10:14 -0700 | [diff] [blame] | 3267 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3268 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
| 3269 | qp_attr->alt_timeout = |
| 3270 | cm_id_priv->alt_av.packet_life_time + 1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3271 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
| 3272 | } |
| 3273 | ret = 0; |
| 3274 | break; |
| 3275 | default: |
| 3276 | ret = -EINVAL; |
| 3277 | break; |
| 3278 | } |
| 3279 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3280 | return ret; |
| 3281 | } |
| 3282 | |
| 3283 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, |
| 3284 | struct ib_qp_attr *qp_attr, |
| 3285 | int *qp_attr_mask) |
| 3286 | { |
| 3287 | unsigned long flags; |
| 3288 | int ret; |
| 3289 | |
| 3290 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3291 | switch (cm_id_priv->id.state) { |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 3292 | /* Allow transition to RTS before sending REP */ |
| 3293 | case IB_CM_REQ_RCVD: |
| 3294 | case IB_CM_MRA_REQ_SENT: |
| 3295 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3296 | case IB_CM_REP_RCVD: |
| 3297 | case IB_CM_MRA_REP_SENT: |
| 3298 | case IB_CM_REP_SENT: |
| 3299 | case IB_CM_MRA_REP_RCVD: |
| 3300 | case IB_CM_ESTABLISHED: |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3301 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
| 3302 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
| 3303 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
| 3304 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3305 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | |
| 3306 | IB_QP_RNR_RETRY | |
| 3307 | IB_QP_MAX_QP_RD_ATOMIC; |
| 3308 | qp_attr->timeout = |
| 3309 | cm_id_priv->av.packet_life_time + 1; |
| 3310 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
| 3311 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; |
| 3312 | qp_attr->max_rd_atomic = |
| 3313 | cm_id_priv->initiator_depth; |
| 3314 | } |
| 3315 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3316 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; |
| 3317 | qp_attr->path_mig_state = IB_MIG_REARM; |
| 3318 | } |
| 3319 | } else { |
| 3320 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; |
| 3321 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
| 3322 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
| 3323 | qp_attr->alt_timeout = |
| 3324 | cm_id_priv->alt_av.packet_life_time + 1; |
| 3325 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3326 | qp_attr->path_mig_state = IB_MIG_REARM; |
| 3327 | } |
| 3328 | ret = 0; |
| 3329 | break; |
| 3330 | default: |
| 3331 | ret = -EINVAL; |
| 3332 | break; |
| 3333 | } |
| 3334 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3335 | return ret; |
| 3336 | } |
| 3337 | |
| 3338 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, |
| 3339 | struct ib_qp_attr *qp_attr, |
| 3340 | int *qp_attr_mask) |
| 3341 | { |
| 3342 | struct cm_id_private *cm_id_priv; |
| 3343 | int ret; |
| 3344 | |
| 3345 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3346 | switch (qp_attr->qp_state) { |
| 3347 | case IB_QPS_INIT: |
| 3348 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3349 | break; |
| 3350 | case IB_QPS_RTR: |
| 3351 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3352 | break; |
| 3353 | case IB_QPS_RTS: |
| 3354 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3355 | break; |
| 3356 | default: |
| 3357 | ret = -EINVAL; |
| 3358 | break; |
| 3359 | } |
| 3360 | return ret; |
| 3361 | } |
| 3362 | EXPORT_SYMBOL(ib_cm_init_qp_attr); |
| 3363 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3364 | static void cm_add_one(struct ib_device *device) |
| 3365 | { |
| 3366 | struct cm_device *cm_dev; |
| 3367 | struct cm_port *port; |
| 3368 | struct ib_mad_reg_req reg_req = { |
| 3369 | .mgmt_class = IB_MGMT_CLASS_CM, |
| 3370 | .mgmt_class_version = IB_CM_CLASS_VERSION |
| 3371 | }; |
| 3372 | struct ib_port_modify port_modify = { |
| 3373 | .set_port_cap_mask = IB_PORT_CM_SUP |
| 3374 | }; |
| 3375 | unsigned long flags; |
| 3376 | int ret; |
| 3377 | u8 i; |
| 3378 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 3379 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 3380 | return; |
| 3381 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3382 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
| 3383 | device->phys_port_cnt, GFP_KERNEL); |
| 3384 | if (!cm_dev) |
| 3385 | return; |
| 3386 | |
| 3387 | cm_dev->device = device; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3388 | |
| 3389 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
| 3390 | for (i = 1; i <= device->phys_port_cnt; i++) { |
| 3391 | port = &cm_dev->port[i-1]; |
| 3392 | port->cm_dev = cm_dev; |
| 3393 | port->port_num = i; |
| 3394 | port->mad_agent = ib_register_mad_agent(device, i, |
| 3395 | IB_QPT_GSI, |
| 3396 | ®_req, |
| 3397 | 0, |
| 3398 | cm_send_handler, |
| 3399 | cm_recv_handler, |
| 3400 | port); |
| 3401 | if (IS_ERR(port->mad_agent)) |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3402 | goto error1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3403 | |
| 3404 | ret = ib_modify_port(device, i, 0, &port_modify); |
| 3405 | if (ret) |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3406 | goto error2; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3407 | } |
| 3408 | ib_set_client_data(device, &cm_client, cm_dev); |
| 3409 | |
| 3410 | write_lock_irqsave(&cm.device_lock, flags); |
| 3411 | list_add_tail(&cm_dev->list, &cm.device_list); |
| 3412 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3413 | return; |
| 3414 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3415 | error2: |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3416 | ib_unregister_mad_agent(port->mad_agent); |
| 3417 | error1: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3418 | port_modify.set_port_cap_mask = 0; |
| 3419 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; |
| 3420 | while (--i) { |
| 3421 | port = &cm_dev->port[i-1]; |
| 3422 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3423 | ib_unregister_mad_agent(port->mad_agent); |
| 3424 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3425 | kfree(cm_dev); |
| 3426 | } |
| 3427 | |
| 3428 | static void cm_remove_one(struct ib_device *device) |
| 3429 | { |
| 3430 | struct cm_device *cm_dev; |
| 3431 | struct cm_port *port; |
| 3432 | struct ib_port_modify port_modify = { |
| 3433 | .clr_port_cap_mask = IB_PORT_CM_SUP |
| 3434 | }; |
| 3435 | unsigned long flags; |
| 3436 | int i; |
| 3437 | |
| 3438 | cm_dev = ib_get_client_data(device, &cm_client); |
| 3439 | if (!cm_dev) |
| 3440 | return; |
| 3441 | |
| 3442 | write_lock_irqsave(&cm.device_lock, flags); |
| 3443 | list_del(&cm_dev->list); |
| 3444 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3445 | |
| 3446 | for (i = 1; i <= device->phys_port_cnt; i++) { |
| 3447 | port = &cm_dev->port[i-1]; |
| 3448 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3449 | ib_unregister_mad_agent(port->mad_agent); |
| 3450 | } |
| 3451 | kfree(cm_dev); |
| 3452 | } |
| 3453 | |
| 3454 | static int __init ib_cm_init(void) |
| 3455 | { |
| 3456 | int ret; |
| 3457 | |
| 3458 | memset(&cm, 0, sizeof cm); |
| 3459 | INIT_LIST_HEAD(&cm.device_list); |
| 3460 | rwlock_init(&cm.device_lock); |
| 3461 | spin_lock_init(&cm.lock); |
| 3462 | cm.listen_service_table = RB_ROOT; |
| 3463 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
| 3464 | cm.remote_id_table = RB_ROOT; |
| 3465 | cm.remote_qp_table = RB_ROOT; |
| 3466 | cm.remote_sidr_table = RB_ROOT; |
| 3467 | idr_init(&cm.local_id_table); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 3468 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3469 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3470 | INIT_LIST_HEAD(&cm.timewait_list); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3471 | |
| 3472 | cm.wq = create_workqueue("ib_cm"); |
| 3473 | if (!cm.wq) |
| 3474 | return -ENOMEM; |
| 3475 | |
| 3476 | ret = ib_register_client(&cm_client); |
| 3477 | if (ret) |
| 3478 | goto error; |
| 3479 | |
| 3480 | return 0; |
| 3481 | error: |
| 3482 | destroy_workqueue(cm.wq); |
| 3483 | return ret; |
| 3484 | } |
| 3485 | |
| 3486 | static void __exit ib_cm_cleanup(void) |
| 3487 | { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3488 | struct cm_timewait_info *timewait_info, *tmp; |
| 3489 | |
| 3490 | spin_lock_irq(&cm.lock); |
| 3491 | list_for_each_entry(timewait_info, &cm.timewait_list, list) |
| 3492 | cancel_delayed_work(&timewait_info->work.work); |
| 3493 | spin_unlock_irq(&cm.lock); |
| 3494 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3495 | destroy_workqueue(cm.wq); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3496 | |
| 3497 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { |
| 3498 | list_del(&timewait_info->list); |
| 3499 | kfree(timewait_info); |
| 3500 | } |
| 3501 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3502 | ib_unregister_client(&cm_client); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 3503 | idr_destroy(&cm.local_id_table); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3504 | } |
| 3505 | |
| 3506 | module_init(ib_cm_init); |
| 3507 | module_exit(ib_cm_cleanup); |
| 3508 | |