Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. |
| 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 | * |
| 35 | * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $ |
| 36 | */ |
| 37 | #include <linux/dma-mapping.h> |
| 38 | #include <linux/err.h> |
| 39 | #include <linux/idr.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/pci.h> |
| 42 | #include <linux/rbtree.h> |
| 43 | #include <linux/spinlock.h> |
| 44 | #include <linux/workqueue.h> |
| 45 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 46 | #include <rdma/ib_cache.h> |
| 47 | #include <rdma/ib_cm.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 48 | #include "cm_msgs.h" |
| 49 | |
| 50 | MODULE_AUTHOR("Sean Hefty"); |
| 51 | MODULE_DESCRIPTION("InfiniBand CM"); |
| 52 | MODULE_LICENSE("Dual BSD/GPL"); |
| 53 | |
| 54 | static void cm_add_one(struct ib_device *device); |
| 55 | static void cm_remove_one(struct ib_device *device); |
| 56 | |
| 57 | static struct ib_client cm_client = { |
| 58 | .name = "cm", |
| 59 | .add = cm_add_one, |
| 60 | .remove = cm_remove_one |
| 61 | }; |
| 62 | |
| 63 | static struct ib_cm { |
| 64 | spinlock_t lock; |
| 65 | struct list_head device_list; |
| 66 | rwlock_t device_lock; |
| 67 | struct rb_root listen_service_table; |
| 68 | u64 listen_service_id; |
| 69 | /* struct rb_root peer_service_table; todo: fix peer to peer */ |
| 70 | struct rb_root remote_qp_table; |
| 71 | struct rb_root remote_id_table; |
| 72 | struct rb_root remote_sidr_table; |
| 73 | struct idr local_id_table; |
| 74 | struct workqueue_struct *wq; |
| 75 | } cm; |
| 76 | |
| 77 | struct cm_port { |
| 78 | struct cm_device *cm_dev; |
| 79 | struct ib_mad_agent *mad_agent; |
| 80 | u8 port_num; |
| 81 | }; |
| 82 | |
| 83 | struct cm_device { |
| 84 | struct list_head list; |
| 85 | struct ib_device *device; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 86 | __be64 ca_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 87 | struct cm_port port[0]; |
| 88 | }; |
| 89 | |
| 90 | struct cm_av { |
| 91 | struct cm_port *port; |
| 92 | union ib_gid dgid; |
| 93 | struct ib_ah_attr ah_attr; |
| 94 | u16 pkey_index; |
| 95 | u8 packet_life_time; |
| 96 | }; |
| 97 | |
| 98 | struct cm_work { |
| 99 | struct work_struct work; |
| 100 | struct list_head list; |
| 101 | struct cm_port *port; |
| 102 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 103 | __be32 local_id; /* Established / timewait */ |
| 104 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 105 | struct ib_cm_event cm_event; |
| 106 | struct ib_sa_path_rec path[0]; |
| 107 | }; |
| 108 | |
| 109 | struct cm_timewait_info { |
| 110 | struct cm_work work; /* Must be first. */ |
| 111 | struct rb_node remote_qp_node; |
| 112 | struct rb_node remote_id_node; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 113 | __be64 remote_ca_guid; |
| 114 | __be32 remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 115 | u8 inserted_remote_qp; |
| 116 | u8 inserted_remote_id; |
| 117 | }; |
| 118 | |
| 119 | struct cm_id_private { |
| 120 | struct ib_cm_id id; |
| 121 | |
| 122 | struct rb_node service_node; |
| 123 | struct rb_node sidr_id_node; |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 124 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 125 | wait_queue_head_t wait; |
| 126 | atomic_t refcount; |
| 127 | |
| 128 | struct ib_mad_send_buf *msg; |
| 129 | struct cm_timewait_info *timewait_info; |
| 130 | /* todo: use alternate port on send failure */ |
| 131 | struct cm_av av; |
| 132 | struct cm_av alt_av; |
| 133 | |
| 134 | void *private_data; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 135 | __be64 tid; |
| 136 | __be32 local_qpn; |
| 137 | __be32 remote_qpn; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 138 | enum ib_qp_type qp_type; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 139 | __be32 sq_psn; |
| 140 | __be32 rq_psn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 141 | int timeout_ms; |
| 142 | enum ib_mtu path_mtu; |
| 143 | u8 private_data_len; |
| 144 | u8 max_cm_retries; |
| 145 | u8 peer_to_peer; |
| 146 | u8 responder_resources; |
| 147 | u8 initiator_depth; |
| 148 | u8 local_ack_timeout; |
| 149 | u8 retry_count; |
| 150 | u8 rnr_retry_count; |
| 151 | u8 service_timeout; |
| 152 | |
| 153 | struct list_head work_list; |
| 154 | atomic_t work_count; |
| 155 | }; |
| 156 | |
| 157 | static void cm_work_handler(void *data); |
| 158 | |
| 159 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) |
| 160 | { |
| 161 | if (atomic_dec_and_test(&cm_id_priv->refcount)) |
| 162 | wake_up(&cm_id_priv->wait); |
| 163 | } |
| 164 | |
| 165 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, |
| 166 | struct ib_mad_send_buf **msg) |
| 167 | { |
| 168 | struct ib_mad_agent *mad_agent; |
| 169 | struct ib_mad_send_buf *m; |
| 170 | struct ib_ah *ah; |
| 171 | |
| 172 | mad_agent = cm_id_priv->av.port->mad_agent; |
| 173 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); |
| 174 | if (IS_ERR(ah)) |
| 175 | return PTR_ERR(ah); |
| 176 | |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 177 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
| 178 | cm_id_priv->av.pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 179 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 180 | GFP_ATOMIC); |
| 181 | if (IS_ERR(m)) { |
| 182 | ib_destroy_ah(ah); |
| 183 | return PTR_ERR(m); |
| 184 | } |
| 185 | |
| 186 | /* Timeout set by caller if response is expected. */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 187 | m->ah = ah; |
| 188 | m->retries = cm_id_priv->max_cm_retries; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 189 | |
| 190 | atomic_inc(&cm_id_priv->refcount); |
| 191 | m->context[0] = cm_id_priv; |
| 192 | *msg = m; |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static int cm_alloc_response_msg(struct cm_port *port, |
| 197 | struct ib_mad_recv_wc *mad_recv_wc, |
| 198 | struct ib_mad_send_buf **msg) |
| 199 | { |
| 200 | struct ib_mad_send_buf *m; |
| 201 | struct ib_ah *ah; |
| 202 | |
| 203 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, |
| 204 | mad_recv_wc->recv_buf.grh, port->port_num); |
| 205 | if (IS_ERR(ah)) |
| 206 | return PTR_ERR(ah); |
| 207 | |
| 208 | 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] | 209 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 210 | GFP_ATOMIC); |
| 211 | if (IS_ERR(m)) { |
| 212 | ib_destroy_ah(ah); |
| 213 | return PTR_ERR(m); |
| 214 | } |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 215 | m->ah = ah; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 216 | *msg = m; |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static void cm_free_msg(struct ib_mad_send_buf *msg) |
| 221 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 222 | ib_destroy_ah(msg->ah); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 223 | if (msg->context[0]) |
| 224 | cm_deref_id(msg->context[0]); |
| 225 | ib_free_send_mad(msg); |
| 226 | } |
| 227 | |
| 228 | static void * cm_copy_private_data(const void *private_data, |
| 229 | u8 private_data_len) |
| 230 | { |
| 231 | void *data; |
| 232 | |
| 233 | if (!private_data || !private_data_len) |
| 234 | return NULL; |
| 235 | |
| 236 | data = kmalloc(private_data_len, GFP_KERNEL); |
| 237 | if (!data) |
| 238 | return ERR_PTR(-ENOMEM); |
| 239 | |
| 240 | memcpy(data, private_data, private_data_len); |
| 241 | return data; |
| 242 | } |
| 243 | |
| 244 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, |
| 245 | void *private_data, u8 private_data_len) |
| 246 | { |
| 247 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) |
| 248 | kfree(cm_id_priv->private_data); |
| 249 | |
| 250 | cm_id_priv->private_data = private_data; |
| 251 | cm_id_priv->private_data_len = private_data_len; |
| 252 | } |
| 253 | |
| 254 | static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num, |
| 255 | u16 dlid, u8 sl, u16 src_path_bits) |
| 256 | { |
| 257 | memset(ah_attr, 0, sizeof ah_attr); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 258 | ah_attr->dlid = dlid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 259 | ah_attr->sl = sl; |
| 260 | ah_attr->src_path_bits = src_path_bits; |
| 261 | ah_attr->port_num = port_num; |
| 262 | } |
| 263 | |
| 264 | static void cm_init_av_for_response(struct cm_port *port, |
| 265 | struct ib_wc *wc, struct cm_av *av) |
| 266 | { |
| 267 | av->port = port; |
| 268 | av->pkey_index = wc->pkey_index; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 269 | cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 270 | wc->sl, wc->dlid_path_bits); |
| 271 | } |
| 272 | |
| 273 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) |
| 274 | { |
| 275 | struct cm_device *cm_dev; |
| 276 | struct cm_port *port = NULL; |
| 277 | unsigned long flags; |
| 278 | int ret; |
| 279 | u8 p; |
| 280 | |
| 281 | read_lock_irqsave(&cm.device_lock, flags); |
| 282 | list_for_each_entry(cm_dev, &cm.device_list, list) { |
| 283 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, |
| 284 | &p, NULL)) { |
| 285 | port = &cm_dev->port[p-1]; |
| 286 | break; |
| 287 | } |
| 288 | } |
| 289 | read_unlock_irqrestore(&cm.device_lock, flags); |
| 290 | |
| 291 | if (!port) |
| 292 | return -EINVAL; |
| 293 | |
| 294 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, |
| 295 | be16_to_cpu(path->pkey), &av->pkey_index); |
| 296 | if (ret) |
| 297 | return ret; |
| 298 | |
| 299 | av->port = port; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 300 | cm_set_ah_attr(&av->ah_attr, av->port->port_num, |
| 301 | be16_to_cpu(path->dlid), path->sl, |
| 302 | be16_to_cpu(path->slid) & 0x7F); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 303 | av->packet_life_time = path->packet_life_time; |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) |
| 308 | { |
| 309 | unsigned long flags; |
| 310 | int ret; |
Sean Hefty | de1bb1a | 2005-11-30 10:01:13 -0800 | [diff] [blame] | 311 | static int next_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 312 | |
| 313 | do { |
| 314 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | de1bb1a | 2005-11-30 10:01:13 -0800 | [diff] [blame] | 315 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 316 | (__force int *) &cm_id_priv->id.local_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 317 | spin_unlock_irqrestore(&cm.lock, flags); |
| 318 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); |
| 319 | return ret; |
| 320 | } |
| 321 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 322 | static void cm_free_id(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 323 | { |
| 324 | unsigned long flags; |
| 325 | |
| 326 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 327 | idr_remove(&cm.local_id_table, (__force int) local_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 328 | spin_unlock_irqrestore(&cm.lock, flags); |
| 329 | } |
| 330 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 331 | 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] | 332 | { |
| 333 | struct cm_id_private *cm_id_priv; |
| 334 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 335 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 336 | if (cm_id_priv) { |
| 337 | if (cm_id_priv->id.remote_id == remote_id) |
| 338 | atomic_inc(&cm_id_priv->refcount); |
| 339 | else |
| 340 | cm_id_priv = NULL; |
| 341 | } |
| 342 | |
| 343 | return cm_id_priv; |
| 344 | } |
| 345 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 346 | 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] | 347 | { |
| 348 | struct cm_id_private *cm_id_priv; |
| 349 | unsigned long flags; |
| 350 | |
| 351 | spin_lock_irqsave(&cm.lock, flags); |
| 352 | cm_id_priv = cm_get_id(local_id, remote_id); |
| 353 | spin_unlock_irqrestore(&cm.lock, flags); |
| 354 | |
| 355 | return cm_id_priv; |
| 356 | } |
| 357 | |
| 358 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
| 359 | { |
| 360 | struct rb_node **link = &cm.listen_service_table.rb_node; |
| 361 | struct rb_node *parent = NULL; |
| 362 | struct cm_id_private *cur_cm_id_priv; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 363 | __be64 service_id = cm_id_priv->id.service_id; |
| 364 | __be64 service_mask = cm_id_priv->id.service_mask; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 365 | |
| 366 | while (*link) { |
| 367 | parent = *link; |
| 368 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 369 | service_node); |
| 370 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 371 | (service_mask & cur_cm_id_priv->id.service_id) && |
| 372 | (cm_id_priv->id.device == cur_cm_id_priv->id.device)) |
| 373 | return cur_cm_id_priv; |
| 374 | |
| 375 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) |
| 376 | link = &(*link)->rb_left; |
| 377 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) |
| 378 | link = &(*link)->rb_right; |
| 379 | else if (service_id < cur_cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 380 | link = &(*link)->rb_left; |
| 381 | else |
| 382 | link = &(*link)->rb_right; |
| 383 | } |
| 384 | rb_link_node(&cm_id_priv->service_node, parent, link); |
| 385 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); |
| 386 | return NULL; |
| 387 | } |
| 388 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 389 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
| 390 | __be64 service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 391 | { |
| 392 | struct rb_node *node = cm.listen_service_table.rb_node; |
| 393 | struct cm_id_private *cm_id_priv; |
| 394 | |
| 395 | while (node) { |
| 396 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); |
| 397 | if ((cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 398 | cm_id_priv->id.service_id && |
| 399 | (cm_id_priv->id.device == device)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 400 | return cm_id_priv; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 401 | |
| 402 | if (device < cm_id_priv->id.device) |
| 403 | node = node->rb_left; |
| 404 | else if (device > cm_id_priv->id.device) |
| 405 | node = node->rb_right; |
| 406 | else if (service_id < cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 407 | node = node->rb_left; |
| 408 | else |
| 409 | node = node->rb_right; |
| 410 | } |
| 411 | return NULL; |
| 412 | } |
| 413 | |
| 414 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info |
| 415 | *timewait_info) |
| 416 | { |
| 417 | struct rb_node **link = &cm.remote_id_table.rb_node; |
| 418 | struct rb_node *parent = NULL; |
| 419 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 420 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 421 | __be32 remote_id = timewait_info->work.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 422 | |
| 423 | while (*link) { |
| 424 | parent = *link; |
| 425 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 426 | remote_id_node); |
| 427 | if (remote_id < cur_timewait_info->work.remote_id) |
| 428 | link = &(*link)->rb_left; |
| 429 | else if (remote_id > cur_timewait_info->work.remote_id) |
| 430 | link = &(*link)->rb_right; |
| 431 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 432 | link = &(*link)->rb_left; |
| 433 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 434 | link = &(*link)->rb_right; |
| 435 | else |
| 436 | return cur_timewait_info; |
| 437 | } |
| 438 | timewait_info->inserted_remote_id = 1; |
| 439 | rb_link_node(&timewait_info->remote_id_node, parent, link); |
| 440 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 441 | return NULL; |
| 442 | } |
| 443 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 444 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
| 445 | __be32 remote_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 446 | { |
| 447 | struct rb_node *node = cm.remote_id_table.rb_node; |
| 448 | struct cm_timewait_info *timewait_info; |
| 449 | |
| 450 | while (node) { |
| 451 | timewait_info = rb_entry(node, struct cm_timewait_info, |
| 452 | remote_id_node); |
| 453 | if (remote_id < timewait_info->work.remote_id) |
| 454 | node = node->rb_left; |
| 455 | else if (remote_id > timewait_info->work.remote_id) |
| 456 | node = node->rb_right; |
| 457 | else if (remote_ca_guid < timewait_info->remote_ca_guid) |
| 458 | node = node->rb_left; |
| 459 | else if (remote_ca_guid > timewait_info->remote_ca_guid) |
| 460 | node = node->rb_right; |
| 461 | else |
| 462 | return timewait_info; |
| 463 | } |
| 464 | return NULL; |
| 465 | } |
| 466 | |
| 467 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info |
| 468 | *timewait_info) |
| 469 | { |
| 470 | struct rb_node **link = &cm.remote_qp_table.rb_node; |
| 471 | struct rb_node *parent = NULL; |
| 472 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 473 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 474 | __be32 remote_qpn = timewait_info->remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 475 | |
| 476 | while (*link) { |
| 477 | parent = *link; |
| 478 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 479 | remote_qp_node); |
| 480 | if (remote_qpn < cur_timewait_info->remote_qpn) |
| 481 | link = &(*link)->rb_left; |
| 482 | else if (remote_qpn > cur_timewait_info->remote_qpn) |
| 483 | link = &(*link)->rb_right; |
| 484 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 485 | link = &(*link)->rb_left; |
| 486 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 487 | link = &(*link)->rb_right; |
| 488 | else |
| 489 | return cur_timewait_info; |
| 490 | } |
| 491 | timewait_info->inserted_remote_qp = 1; |
| 492 | rb_link_node(&timewait_info->remote_qp_node, parent, link); |
| 493 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 494 | return NULL; |
| 495 | } |
| 496 | |
| 497 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private |
| 498 | *cm_id_priv) |
| 499 | { |
| 500 | struct rb_node **link = &cm.remote_sidr_table.rb_node; |
| 501 | struct rb_node *parent = NULL; |
| 502 | struct cm_id_private *cur_cm_id_priv; |
| 503 | union ib_gid *port_gid = &cm_id_priv->av.dgid; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 504 | __be32 remote_id = cm_id_priv->id.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 505 | |
| 506 | while (*link) { |
| 507 | parent = *link; |
| 508 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 509 | sidr_id_node); |
| 510 | if (remote_id < cur_cm_id_priv->id.remote_id) |
| 511 | link = &(*link)->rb_left; |
| 512 | else if (remote_id > cur_cm_id_priv->id.remote_id) |
| 513 | link = &(*link)->rb_right; |
| 514 | else { |
| 515 | int cmp; |
| 516 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, |
| 517 | sizeof *port_gid); |
| 518 | if (cmp < 0) |
| 519 | link = &(*link)->rb_left; |
| 520 | else if (cmp > 0) |
| 521 | link = &(*link)->rb_right; |
| 522 | else |
| 523 | return cur_cm_id_priv; |
| 524 | } |
| 525 | } |
| 526 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); |
| 527 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 528 | return NULL; |
| 529 | } |
| 530 | |
| 531 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, |
| 532 | enum ib_cm_sidr_status status) |
| 533 | { |
| 534 | struct ib_cm_sidr_rep_param param; |
| 535 | |
| 536 | memset(¶m, 0, sizeof param); |
| 537 | param.status = status; |
| 538 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); |
| 539 | } |
| 540 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 541 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
| 542 | ib_cm_handler cm_handler, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 543 | void *context) |
| 544 | { |
| 545 | struct cm_id_private *cm_id_priv; |
| 546 | int ret; |
| 547 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 548 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 549 | if (!cm_id_priv) |
| 550 | return ERR_PTR(-ENOMEM); |
| 551 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 552 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 553 | cm_id_priv->id.device = device; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 554 | cm_id_priv->id.cm_handler = cm_handler; |
| 555 | cm_id_priv->id.context = context; |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 556 | cm_id_priv->id.remote_cm_qpn = 1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 557 | ret = cm_alloc_id(cm_id_priv); |
| 558 | if (ret) |
| 559 | goto error; |
| 560 | |
| 561 | spin_lock_init(&cm_id_priv->lock); |
| 562 | init_waitqueue_head(&cm_id_priv->wait); |
| 563 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
| 564 | atomic_set(&cm_id_priv->work_count, -1); |
| 565 | atomic_set(&cm_id_priv->refcount, 1); |
| 566 | return &cm_id_priv->id; |
| 567 | |
| 568 | error: |
| 569 | kfree(cm_id_priv); |
| 570 | return ERR_PTR(-ENOMEM); |
| 571 | } |
| 572 | EXPORT_SYMBOL(ib_create_cm_id); |
| 573 | |
| 574 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) |
| 575 | { |
| 576 | struct cm_work *work; |
| 577 | |
| 578 | if (list_empty(&cm_id_priv->work_list)) |
| 579 | return NULL; |
| 580 | |
| 581 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); |
| 582 | list_del(&work->list); |
| 583 | return work; |
| 584 | } |
| 585 | |
| 586 | static void cm_free_work(struct cm_work *work) |
| 587 | { |
| 588 | if (work->mad_recv_wc) |
| 589 | ib_free_recv_mad(work->mad_recv_wc); |
| 590 | kfree(work); |
| 591 | } |
| 592 | |
| 593 | static inline int cm_convert_to_ms(int iba_time) |
| 594 | { |
| 595 | /* approximate conversion to ms from 4.096us x 2^iba_time */ |
| 596 | return 1 << max(iba_time - 8, 0); |
| 597 | } |
| 598 | |
| 599 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
| 600 | { |
| 601 | unsigned long flags; |
| 602 | |
| 603 | if (!timewait_info->inserted_remote_id && |
| 604 | !timewait_info->inserted_remote_qp) |
| 605 | return; |
| 606 | |
| 607 | spin_lock_irqsave(&cm.lock, flags); |
| 608 | if (timewait_info->inserted_remote_id) { |
| 609 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 610 | timewait_info->inserted_remote_id = 0; |
| 611 | } |
| 612 | |
| 613 | if (timewait_info->inserted_remote_qp) { |
| 614 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 615 | timewait_info->inserted_remote_qp = 0; |
| 616 | } |
| 617 | spin_unlock_irqrestore(&cm.lock, flags); |
| 618 | } |
| 619 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 620 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 621 | { |
| 622 | struct cm_timewait_info *timewait_info; |
| 623 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 624 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 625 | if (!timewait_info) |
| 626 | return ERR_PTR(-ENOMEM); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 627 | |
| 628 | timewait_info->work.local_id = local_id; |
| 629 | INIT_WORK(&timewait_info->work.work, cm_work_handler, |
| 630 | &timewait_info->work); |
| 631 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
| 632 | return timewait_info; |
| 633 | } |
| 634 | |
| 635 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) |
| 636 | { |
| 637 | int wait_time; |
| 638 | |
| 639 | /* |
| 640 | * The cm_id could be destroyed by the user before we exit timewait. |
| 641 | * To protect against this, we search for the cm_id after exiting |
| 642 | * timewait before notifying the user that we've exited timewait. |
| 643 | */ |
| 644 | cm_id_priv->id.state = IB_CM_TIMEWAIT; |
| 645 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); |
| 646 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
| 647 | msecs_to_jiffies(wait_time)); |
| 648 | cm_id_priv->timewait_info = NULL; |
| 649 | } |
| 650 | |
| 651 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) |
| 652 | { |
| 653 | cm_id_priv->id.state = IB_CM_IDLE; |
| 654 | if (cm_id_priv->timewait_info) { |
| 655 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
| 656 | kfree(cm_id_priv->timewait_info); |
| 657 | cm_id_priv->timewait_info = NULL; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) |
| 662 | { |
| 663 | struct cm_id_private *cm_id_priv; |
| 664 | struct cm_work *work; |
| 665 | unsigned long flags; |
| 666 | |
| 667 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 668 | retest: |
| 669 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 670 | switch (cm_id->state) { |
| 671 | case IB_CM_LISTEN: |
| 672 | cm_id->state = IB_CM_IDLE; |
| 673 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 674 | spin_lock_irqsave(&cm.lock, flags); |
| 675 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
| 676 | spin_unlock_irqrestore(&cm.lock, flags); |
| 677 | break; |
| 678 | case IB_CM_SIDR_REQ_SENT: |
| 679 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 680 | 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] | 681 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 682 | break; |
| 683 | case IB_CM_SIDR_REQ_RCVD: |
| 684 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 685 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
| 686 | break; |
| 687 | case IB_CM_REQ_SENT: |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 688 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| 689 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 690 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
| 691 | &cm_id_priv->av.port->cm_dev->ca_guid, |
| 692 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, |
| 693 | NULL, 0); |
| 694 | break; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 695 | case IB_CM_MRA_REQ_RCVD: |
| 696 | case IB_CM_REP_SENT: |
| 697 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 698 | 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] | 699 | /* Fall through */ |
| 700 | case IB_CM_REQ_RCVD: |
| 701 | case IB_CM_MRA_REQ_SENT: |
| 702 | case IB_CM_REP_RCVD: |
| 703 | case IB_CM_MRA_REP_SENT: |
| 704 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 705 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 706 | NULL, 0, NULL, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 707 | break; |
| 708 | case IB_CM_ESTABLISHED: |
| 709 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 710 | ib_send_cm_dreq(cm_id, NULL, 0); |
| 711 | goto retest; |
| 712 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 713 | 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] | 714 | cm_enter_timewait(cm_id_priv); |
| 715 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 716 | break; |
| 717 | case IB_CM_DREQ_RCVD: |
| 718 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 719 | ib_send_cm_drep(cm_id, NULL, 0); |
| 720 | break; |
| 721 | default: |
| 722 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 723 | break; |
| 724 | } |
| 725 | |
| 726 | cm_free_id(cm_id->local_id); |
| 727 | atomic_dec(&cm_id_priv->refcount); |
| 728 | wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount)); |
| 729 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
| 730 | cm_free_work(work); |
| 731 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) |
| 732 | kfree(cm_id_priv->private_data); |
| 733 | kfree(cm_id_priv); |
| 734 | } |
| 735 | EXPORT_SYMBOL(ib_destroy_cm_id); |
| 736 | |
| 737 | int ib_cm_listen(struct ib_cm_id *cm_id, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 738 | __be64 service_id, |
| 739 | __be64 service_mask) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 740 | { |
| 741 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 742 | unsigned long flags; |
| 743 | int ret = 0; |
| 744 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 745 | service_mask = service_mask ? service_mask : |
| 746 | __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 747 | service_id &= service_mask; |
| 748 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && |
| 749 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) |
| 750 | return -EINVAL; |
| 751 | |
| 752 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 753 | BUG_ON(cm_id->state != IB_CM_IDLE); |
| 754 | |
| 755 | cm_id->state = IB_CM_LISTEN; |
| 756 | |
| 757 | spin_lock_irqsave(&cm.lock, flags); |
| 758 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 759 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
| 760 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 761 | } else { |
| 762 | cm_id->service_id = service_id; |
| 763 | cm_id->service_mask = service_mask; |
| 764 | } |
| 765 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); |
| 766 | spin_unlock_irqrestore(&cm.lock, flags); |
| 767 | |
| 768 | if (cur_cm_id_priv) { |
| 769 | cm_id->state = IB_CM_IDLE; |
| 770 | ret = -EBUSY; |
| 771 | } |
| 772 | return ret; |
| 773 | } |
| 774 | EXPORT_SYMBOL(ib_cm_listen); |
| 775 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 776 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
| 777 | enum cm_msg_sequence msg_seq) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 778 | { |
| 779 | u64 hi_tid, low_tid; |
| 780 | |
| 781 | 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] | 782 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
| 783 | (msg_seq << 30)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 784 | return cpu_to_be64(hi_tid | low_tid); |
| 785 | } |
| 786 | |
| 787 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 788 | __be16 attr_id, __be64 tid) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 789 | { |
| 790 | hdr->base_version = IB_MGMT_BASE_VERSION; |
| 791 | hdr->mgmt_class = IB_MGMT_CLASS_CM; |
| 792 | hdr->class_version = IB_CM_CLASS_VERSION; |
| 793 | hdr->method = IB_MGMT_METHOD_SEND; |
| 794 | hdr->attr_id = attr_id; |
| 795 | hdr->tid = tid; |
| 796 | } |
| 797 | |
| 798 | static void cm_format_req(struct cm_req_msg *req_msg, |
| 799 | struct cm_id_private *cm_id_priv, |
| 800 | struct ib_cm_req_param *param) |
| 801 | { |
| 802 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
| 803 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); |
| 804 | |
| 805 | req_msg->local_comm_id = cm_id_priv->id.local_id; |
| 806 | req_msg->service_id = param->service_id; |
| 807 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; |
| 808 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
| 809 | cm_req_set_resp_res(req_msg, param->responder_resources); |
| 810 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
| 811 | cm_req_set_remote_resp_timeout(req_msg, |
| 812 | param->remote_cm_response_timeout); |
| 813 | cm_req_set_qp_type(req_msg, param->qp_type); |
| 814 | cm_req_set_flow_ctrl(req_msg, param->flow_control); |
| 815 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); |
| 816 | cm_req_set_local_resp_timeout(req_msg, |
| 817 | param->local_cm_response_timeout); |
| 818 | cm_req_set_retry_count(req_msg, param->retry_count); |
| 819 | req_msg->pkey = param->primary_path->pkey; |
| 820 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); |
| 821 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); |
| 822 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
| 823 | cm_req_set_srq(req_msg, param->srq); |
| 824 | |
| 825 | req_msg->primary_local_lid = param->primary_path->slid; |
| 826 | req_msg->primary_remote_lid = param->primary_path->dlid; |
| 827 | req_msg->primary_local_gid = param->primary_path->sgid; |
| 828 | req_msg->primary_remote_gid = param->primary_path->dgid; |
| 829 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); |
| 830 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); |
| 831 | req_msg->primary_traffic_class = param->primary_path->traffic_class; |
| 832 | req_msg->primary_hop_limit = param->primary_path->hop_limit; |
| 833 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); |
| 834 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ |
| 835 | cm_req_set_primary_local_ack_timeout(req_msg, |
| 836 | min(31, param->primary_path->packet_life_time + 1)); |
| 837 | |
| 838 | if (param->alternate_path) { |
| 839 | req_msg->alt_local_lid = param->alternate_path->slid; |
| 840 | req_msg->alt_remote_lid = param->alternate_path->dlid; |
| 841 | req_msg->alt_local_gid = param->alternate_path->sgid; |
| 842 | req_msg->alt_remote_gid = param->alternate_path->dgid; |
| 843 | cm_req_set_alt_flow_label(req_msg, |
| 844 | param->alternate_path->flow_label); |
| 845 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); |
| 846 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; |
| 847 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; |
| 848 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); |
| 849 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ |
| 850 | cm_req_set_alt_local_ack_timeout(req_msg, |
| 851 | min(31, param->alternate_path->packet_life_time + 1)); |
| 852 | } |
| 853 | |
| 854 | if (param->private_data && param->private_data_len) |
| 855 | memcpy(req_msg->private_data, param->private_data, |
| 856 | param->private_data_len); |
| 857 | } |
| 858 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 859 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 860 | { |
| 861 | /* peer-to-peer not supported */ |
| 862 | if (param->peer_to_peer) |
| 863 | return -EINVAL; |
| 864 | |
| 865 | if (!param->primary_path) |
| 866 | return -EINVAL; |
| 867 | |
| 868 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) |
| 869 | return -EINVAL; |
| 870 | |
| 871 | if (param->private_data && |
| 872 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) |
| 873 | return -EINVAL; |
| 874 | |
| 875 | if (param->alternate_path && |
| 876 | (param->alternate_path->pkey != param->primary_path->pkey || |
| 877 | param->alternate_path->mtu != param->primary_path->mtu)) |
| 878 | return -EINVAL; |
| 879 | |
| 880 | return 0; |
| 881 | } |
| 882 | |
| 883 | int ib_send_cm_req(struct ib_cm_id *cm_id, |
| 884 | struct ib_cm_req_param *param) |
| 885 | { |
| 886 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 887 | struct cm_req_msg *req_msg; |
| 888 | unsigned long flags; |
| 889 | int ret; |
| 890 | |
| 891 | ret = cm_validate_req_param(param); |
| 892 | if (ret) |
| 893 | return ret; |
| 894 | |
| 895 | /* Verify that we're not in timewait. */ |
| 896 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 897 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 898 | if (cm_id->state != IB_CM_IDLE) { |
| 899 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 900 | ret = -EINVAL; |
| 901 | goto out; |
| 902 | } |
| 903 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 904 | |
| 905 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 906 | id.local_id); |
| 907 | if (IS_ERR(cm_id_priv->timewait_info)) |
| 908 | goto out; |
| 909 | |
| 910 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); |
| 911 | if (ret) |
| 912 | goto error1; |
| 913 | if (param->alternate_path) { |
| 914 | ret = cm_init_av_by_path(param->alternate_path, |
| 915 | &cm_id_priv->alt_av); |
| 916 | if (ret) |
| 917 | goto error1; |
| 918 | } |
| 919 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 920 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 921 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 922 | param->primary_path->packet_life_time) * 2 + |
| 923 | cm_convert_to_ms( |
| 924 | param->remote_cm_response_timeout); |
| 925 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 926 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 927 | cm_id_priv->responder_resources = param->responder_resources; |
| 928 | cm_id_priv->retry_count = param->retry_count; |
| 929 | cm_id_priv->path_mtu = param->primary_path->mtu; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 930 | cm_id_priv->qp_type = param->qp_type; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 931 | |
| 932 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); |
| 933 | if (ret) |
| 934 | goto error1; |
| 935 | |
| 936 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; |
| 937 | cm_format_req(req_msg, cm_id_priv, param); |
| 938 | cm_id_priv->tid = req_msg->hdr.tid; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 939 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 940 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
| 941 | |
| 942 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); |
| 943 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); |
| 944 | cm_id_priv->local_ack_timeout = |
| 945 | cm_req_get_primary_local_ack_timeout(req_msg); |
| 946 | |
| 947 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 948 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 949 | if (ret) { |
| 950 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 951 | goto error2; |
| 952 | } |
| 953 | BUG_ON(cm_id->state != IB_CM_IDLE); |
| 954 | cm_id->state = IB_CM_REQ_SENT; |
| 955 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 956 | return 0; |
| 957 | |
| 958 | error2: cm_free_msg(cm_id_priv->msg); |
| 959 | error1: kfree(cm_id_priv->timewait_info); |
| 960 | out: return ret; |
| 961 | } |
| 962 | EXPORT_SYMBOL(ib_send_cm_req); |
| 963 | |
| 964 | static int cm_issue_rej(struct cm_port *port, |
| 965 | struct ib_mad_recv_wc *mad_recv_wc, |
| 966 | enum ib_cm_rej_reason reason, |
| 967 | enum cm_msg_response msg_rejected, |
| 968 | void *ari, u8 ari_length) |
| 969 | { |
| 970 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 971 | struct cm_rej_msg *rej_msg, *rcv_msg; |
| 972 | int ret; |
| 973 | |
| 974 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| 975 | if (ret) |
| 976 | return ret; |
| 977 | |
| 978 | /* We just need common CM header information. Cast to any message. */ |
| 979 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; |
| 980 | rej_msg = (struct cm_rej_msg *) msg->mad; |
| 981 | |
| 982 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); |
| 983 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; |
| 984 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; |
| 985 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 986 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 987 | |
| 988 | if (ari && ari_length) { |
| 989 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 990 | memcpy(rej_msg->ari, ari, ari_length); |
| 991 | } |
| 992 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 993 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 994 | if (ret) |
| 995 | cm_free_msg(msg); |
| 996 | |
| 997 | return ret; |
| 998 | } |
| 999 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1000 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
| 1001 | __be32 local_qpn, __be32 remote_qpn) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1002 | { |
| 1003 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || |
| 1004 | ((local_ca_guid == remote_ca_guid) && |
| 1005 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); |
| 1006 | } |
| 1007 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1008 | 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] | 1009 | struct ib_sa_path_rec *primary_path, |
| 1010 | struct ib_sa_path_rec *alt_path) |
| 1011 | { |
| 1012 | memset(primary_path, 0, sizeof *primary_path); |
| 1013 | primary_path->dgid = req_msg->primary_local_gid; |
| 1014 | primary_path->sgid = req_msg->primary_remote_gid; |
| 1015 | primary_path->dlid = req_msg->primary_local_lid; |
| 1016 | primary_path->slid = req_msg->primary_remote_lid; |
| 1017 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); |
| 1018 | primary_path->hop_limit = req_msg->primary_hop_limit; |
| 1019 | primary_path->traffic_class = req_msg->primary_traffic_class; |
| 1020 | primary_path->reversible = 1; |
| 1021 | primary_path->pkey = req_msg->pkey; |
| 1022 | primary_path->sl = cm_req_get_primary_sl(req_msg); |
| 1023 | primary_path->mtu_selector = IB_SA_EQ; |
| 1024 | primary_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1025 | primary_path->rate_selector = IB_SA_EQ; |
| 1026 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); |
| 1027 | primary_path->packet_life_time_selector = IB_SA_EQ; |
| 1028 | primary_path->packet_life_time = |
| 1029 | cm_req_get_primary_local_ack_timeout(req_msg); |
| 1030 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
| 1031 | |
| 1032 | if (req_msg->alt_local_lid) { |
| 1033 | memset(alt_path, 0, sizeof *alt_path); |
| 1034 | alt_path->dgid = req_msg->alt_local_gid; |
| 1035 | alt_path->sgid = req_msg->alt_remote_gid; |
| 1036 | alt_path->dlid = req_msg->alt_local_lid; |
| 1037 | alt_path->slid = req_msg->alt_remote_lid; |
| 1038 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); |
| 1039 | alt_path->hop_limit = req_msg->alt_hop_limit; |
| 1040 | alt_path->traffic_class = req_msg->alt_traffic_class; |
| 1041 | alt_path->reversible = 1; |
| 1042 | alt_path->pkey = req_msg->pkey; |
| 1043 | alt_path->sl = cm_req_get_alt_sl(req_msg); |
| 1044 | alt_path->mtu_selector = IB_SA_EQ; |
| 1045 | alt_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1046 | alt_path->rate_selector = IB_SA_EQ; |
| 1047 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); |
| 1048 | alt_path->packet_life_time_selector = IB_SA_EQ; |
| 1049 | alt_path->packet_life_time = |
| 1050 | cm_req_get_alt_local_ack_timeout(req_msg); |
| 1051 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | static void cm_format_req_event(struct cm_work *work, |
| 1056 | struct cm_id_private *cm_id_priv, |
| 1057 | struct ib_cm_id *listen_id) |
| 1058 | { |
| 1059 | struct cm_req_msg *req_msg; |
| 1060 | struct ib_cm_req_event_param *param; |
| 1061 | |
| 1062 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1063 | param = &work->cm_event.param.req_rcvd; |
| 1064 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1065 | param->port = cm_id_priv->av.port->port_num; |
| 1066 | param->primary_path = &work->path[0]; |
| 1067 | if (req_msg->alt_local_lid) |
| 1068 | param->alternate_path = &work->path[1]; |
| 1069 | else |
| 1070 | param->alternate_path = NULL; |
| 1071 | param->remote_ca_guid = req_msg->local_ca_guid; |
| 1072 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); |
| 1073 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); |
| 1074 | param->qp_type = cm_req_get_qp_type(req_msg); |
| 1075 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); |
| 1076 | param->responder_resources = cm_req_get_init_depth(req_msg); |
| 1077 | param->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1078 | param->local_cm_response_timeout = |
| 1079 | cm_req_get_remote_resp_timeout(req_msg); |
| 1080 | param->flow_control = cm_req_get_flow_ctrl(req_msg); |
| 1081 | param->remote_cm_response_timeout = |
| 1082 | cm_req_get_local_resp_timeout(req_msg); |
| 1083 | param->retry_count = cm_req_get_retry_count(req_msg); |
| 1084 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
| 1085 | param->srq = cm_req_get_srq(req_msg); |
| 1086 | work->cm_event.private_data = &req_msg->private_data; |
| 1087 | } |
| 1088 | |
| 1089 | static void cm_process_work(struct cm_id_private *cm_id_priv, |
| 1090 | struct cm_work *work) |
| 1091 | { |
| 1092 | unsigned long flags; |
| 1093 | int ret; |
| 1094 | |
| 1095 | /* We will typically only have the current event to report. */ |
| 1096 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); |
| 1097 | cm_free_work(work); |
| 1098 | |
| 1099 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { |
| 1100 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1101 | work = cm_dequeue_work(cm_id_priv); |
| 1102 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1103 | BUG_ON(!work); |
| 1104 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, |
| 1105 | &work->cm_event); |
| 1106 | cm_free_work(work); |
| 1107 | } |
| 1108 | cm_deref_id(cm_id_priv); |
| 1109 | if (ret) |
| 1110 | ib_destroy_cm_id(&cm_id_priv->id); |
| 1111 | } |
| 1112 | |
| 1113 | static void cm_format_mra(struct cm_mra_msg *mra_msg, |
| 1114 | struct cm_id_private *cm_id_priv, |
| 1115 | enum cm_msg_response msg_mraed, u8 service_timeout, |
| 1116 | const void *private_data, u8 private_data_len) |
| 1117 | { |
| 1118 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); |
| 1119 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); |
| 1120 | mra_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1121 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1122 | cm_mra_set_service_timeout(mra_msg, service_timeout); |
| 1123 | |
| 1124 | if (private_data && private_data_len) |
| 1125 | memcpy(mra_msg->private_data, private_data, private_data_len); |
| 1126 | } |
| 1127 | |
| 1128 | static void cm_format_rej(struct cm_rej_msg *rej_msg, |
| 1129 | struct cm_id_private *cm_id_priv, |
| 1130 | enum ib_cm_rej_reason reason, |
| 1131 | void *ari, |
| 1132 | u8 ari_length, |
| 1133 | const void *private_data, |
| 1134 | u8 private_data_len) |
| 1135 | { |
| 1136 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
| 1137 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1138 | |
| 1139 | switch(cm_id_priv->id.state) { |
| 1140 | case IB_CM_REQ_RCVD: |
| 1141 | rej_msg->local_comm_id = 0; |
| 1142 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1143 | break; |
| 1144 | case IB_CM_MRA_REQ_SENT: |
| 1145 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1146 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1147 | break; |
| 1148 | case IB_CM_REP_RCVD: |
| 1149 | case IB_CM_MRA_REP_SENT: |
| 1150 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1151 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); |
| 1152 | break; |
| 1153 | default: |
| 1154 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1155 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); |
| 1156 | break; |
| 1157 | } |
| 1158 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1159 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1160 | if (ari && ari_length) { |
| 1161 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 1162 | memcpy(rej_msg->ari, ari, ari_length); |
| 1163 | } |
| 1164 | |
| 1165 | if (private_data && private_data_len) |
| 1166 | memcpy(rej_msg->private_data, private_data, private_data_len); |
| 1167 | } |
| 1168 | |
| 1169 | static void cm_dup_req_handler(struct cm_work *work, |
| 1170 | struct cm_id_private *cm_id_priv) |
| 1171 | { |
| 1172 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1173 | unsigned long flags; |
| 1174 | int ret; |
| 1175 | |
| 1176 | /* Quick state check to discard duplicate REQs. */ |
| 1177 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) |
| 1178 | return; |
| 1179 | |
| 1180 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1181 | if (ret) |
| 1182 | return; |
| 1183 | |
| 1184 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1185 | switch (cm_id_priv->id.state) { |
| 1186 | case IB_CM_MRA_REQ_SENT: |
| 1187 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1188 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, |
| 1189 | cm_id_priv->private_data, |
| 1190 | cm_id_priv->private_data_len); |
| 1191 | break; |
| 1192 | case IB_CM_TIMEWAIT: |
| 1193 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, |
| 1194 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); |
| 1195 | break; |
| 1196 | default: |
| 1197 | goto unlock; |
| 1198 | } |
| 1199 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1200 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1201 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1202 | if (ret) |
| 1203 | goto free; |
| 1204 | return; |
| 1205 | |
| 1206 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1207 | free: cm_free_msg(msg); |
| 1208 | } |
| 1209 | |
| 1210 | static struct cm_id_private * cm_match_req(struct cm_work *work, |
| 1211 | struct cm_id_private *cm_id_priv) |
| 1212 | { |
| 1213 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; |
| 1214 | struct cm_timewait_info *timewait_info; |
| 1215 | struct cm_req_msg *req_msg; |
| 1216 | unsigned long flags; |
| 1217 | |
| 1218 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1219 | |
| 1220 | /* Check for duplicate REQ and stale connections. */ |
| 1221 | spin_lock_irqsave(&cm.lock, flags); |
| 1222 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
| 1223 | if (!timewait_info) |
| 1224 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
| 1225 | |
| 1226 | if (timewait_info) { |
| 1227 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, |
| 1228 | timewait_info->work.remote_id); |
| 1229 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1230 | if (cur_cm_id_priv) { |
| 1231 | cm_dup_req_handler(work, cur_cm_id_priv); |
| 1232 | cm_deref_id(cur_cm_id_priv); |
| 1233 | } else |
| 1234 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1235 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, |
| 1236 | NULL, 0); |
| 1237 | goto error; |
| 1238 | } |
| 1239 | |
| 1240 | /* Find matching listen request. */ |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1241 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
| 1242 | req_msg->service_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1243 | if (!listen_cm_id_priv) { |
| 1244 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1245 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1246 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, |
| 1247 | NULL, 0); |
| 1248 | goto error; |
| 1249 | } |
| 1250 | atomic_inc(&listen_cm_id_priv->refcount); |
| 1251 | atomic_inc(&cm_id_priv->refcount); |
| 1252 | cm_id_priv->id.state = IB_CM_REQ_RCVD; |
| 1253 | atomic_inc(&cm_id_priv->work_count); |
| 1254 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1255 | return listen_cm_id_priv; |
| 1256 | |
| 1257 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); |
| 1258 | return NULL; |
| 1259 | } |
| 1260 | |
| 1261 | static int cm_req_handler(struct cm_work *work) |
| 1262 | { |
| 1263 | struct ib_cm_id *cm_id; |
| 1264 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
| 1265 | struct cm_req_msg *req_msg; |
| 1266 | int ret; |
| 1267 | |
| 1268 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1269 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1270 | 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] | 1271 | if (IS_ERR(cm_id)) |
| 1272 | return PTR_ERR(cm_id); |
| 1273 | |
| 1274 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1275 | cm_id_priv->id.remote_id = req_msg->local_comm_id; |
| 1276 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| 1277 | &cm_id_priv->av); |
| 1278 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 1279 | id.local_id); |
| 1280 | if (IS_ERR(cm_id_priv->timewait_info)) { |
| 1281 | ret = PTR_ERR(cm_id_priv->timewait_info); |
| 1282 | goto error1; |
| 1283 | } |
| 1284 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; |
| 1285 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; |
| 1286 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1287 | |
| 1288 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); |
| 1289 | if (!listen_cm_id_priv) { |
| 1290 | ret = -EINVAL; |
| 1291 | goto error2; |
| 1292 | } |
| 1293 | |
| 1294 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
| 1295 | cm_id_priv->id.context = listen_cm_id_priv->id.context; |
| 1296 | cm_id_priv->id.service_id = req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1297 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1298 | |
| 1299 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
| 1300 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
| 1301 | if (ret) |
| 1302 | goto error3; |
| 1303 | if (req_msg->alt_local_lid) { |
| 1304 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); |
| 1305 | if (ret) |
| 1306 | goto error3; |
| 1307 | } |
| 1308 | cm_id_priv->tid = req_msg->hdr.tid; |
| 1309 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 1310 | cm_req_get_local_resp_timeout(req_msg)); |
| 1311 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); |
| 1312 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1313 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1314 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); |
| 1315 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); |
| 1316 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
| 1317 | cm_id_priv->local_ack_timeout = |
| 1318 | cm_req_get_primary_local_ack_timeout(req_msg); |
| 1319 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
| 1320 | 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] | 1321 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1322 | |
| 1323 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| 1324 | cm_process_work(cm_id_priv, work); |
| 1325 | cm_deref_id(listen_cm_id_priv); |
| 1326 | return 0; |
| 1327 | |
| 1328 | error3: atomic_dec(&cm_id_priv->refcount); |
| 1329 | cm_deref_id(listen_cm_id_priv); |
| 1330 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
| 1331 | error2: kfree(cm_id_priv->timewait_info); |
Roland Dreier | 1b205c2 | 2005-09-09 20:52:00 -0700 | [diff] [blame] | 1332 | cm_id_priv->timewait_info = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1333 | error1: ib_destroy_cm_id(&cm_id_priv->id); |
| 1334 | return ret; |
| 1335 | } |
| 1336 | |
| 1337 | static void cm_format_rep(struct cm_rep_msg *rep_msg, |
| 1338 | struct cm_id_private *cm_id_priv, |
| 1339 | struct ib_cm_rep_param *param) |
| 1340 | { |
| 1341 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); |
| 1342 | rep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1343 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1344 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
| 1345 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
| 1346 | rep_msg->resp_resources = param->responder_resources; |
| 1347 | rep_msg->initiator_depth = param->initiator_depth; |
| 1348 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); |
| 1349 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
| 1350 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); |
| 1351 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
| 1352 | cm_rep_set_srq(rep_msg, param->srq); |
| 1353 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; |
| 1354 | |
| 1355 | if (param->private_data && param->private_data_len) |
| 1356 | memcpy(rep_msg->private_data, param->private_data, |
| 1357 | param->private_data_len); |
| 1358 | } |
| 1359 | |
| 1360 | int ib_send_cm_rep(struct ib_cm_id *cm_id, |
| 1361 | struct ib_cm_rep_param *param) |
| 1362 | { |
| 1363 | struct cm_id_private *cm_id_priv; |
| 1364 | struct ib_mad_send_buf *msg; |
| 1365 | struct cm_rep_msg *rep_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1366 | unsigned long flags; |
| 1367 | int ret; |
| 1368 | |
| 1369 | if (param->private_data && |
| 1370 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) |
| 1371 | return -EINVAL; |
| 1372 | |
| 1373 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1374 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1375 | if (cm_id->state != IB_CM_REQ_RCVD && |
| 1376 | cm_id->state != IB_CM_MRA_REQ_SENT) { |
| 1377 | ret = -EINVAL; |
| 1378 | goto out; |
| 1379 | } |
| 1380 | |
| 1381 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1382 | if (ret) |
| 1383 | goto out; |
| 1384 | |
| 1385 | rep_msg = (struct cm_rep_msg *) msg->mad; |
| 1386 | cm_format_rep(rep_msg, cm_id_priv, param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1387 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1388 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
| 1389 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1390 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1391 | if (ret) { |
| 1392 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1393 | cm_free_msg(msg); |
| 1394 | return ret; |
| 1395 | } |
| 1396 | |
| 1397 | cm_id->state = IB_CM_REP_SENT; |
| 1398 | cm_id_priv->msg = msg; |
| 1399 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 1400 | cm_id_priv->responder_resources = param->responder_resources; |
| 1401 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1402 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1403 | |
| 1404 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1405 | return ret; |
| 1406 | } |
| 1407 | EXPORT_SYMBOL(ib_send_cm_rep); |
| 1408 | |
| 1409 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, |
| 1410 | struct cm_id_private *cm_id_priv, |
| 1411 | const void *private_data, |
| 1412 | u8 private_data_len) |
| 1413 | { |
| 1414 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); |
| 1415 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1416 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1417 | |
| 1418 | if (private_data && private_data_len) |
| 1419 | memcpy(rtu_msg->private_data, private_data, private_data_len); |
| 1420 | } |
| 1421 | |
| 1422 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, |
| 1423 | const void *private_data, |
| 1424 | u8 private_data_len) |
| 1425 | { |
| 1426 | struct cm_id_private *cm_id_priv; |
| 1427 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1428 | unsigned long flags; |
| 1429 | void *data; |
| 1430 | int ret; |
| 1431 | |
| 1432 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) |
| 1433 | return -EINVAL; |
| 1434 | |
| 1435 | data = cm_copy_private_data(private_data, private_data_len); |
| 1436 | if (IS_ERR(data)) |
| 1437 | return PTR_ERR(data); |
| 1438 | |
| 1439 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1440 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1441 | if (cm_id->state != IB_CM_REP_RCVD && |
| 1442 | cm_id->state != IB_CM_MRA_REP_SENT) { |
| 1443 | ret = -EINVAL; |
| 1444 | goto error; |
| 1445 | } |
| 1446 | |
| 1447 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1448 | if (ret) |
| 1449 | goto error; |
| 1450 | |
| 1451 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1452 | private_data, private_data_len); |
| 1453 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1454 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1455 | if (ret) { |
| 1456 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1457 | cm_free_msg(msg); |
| 1458 | kfree(data); |
| 1459 | return ret; |
| 1460 | } |
| 1461 | |
| 1462 | cm_id->state = IB_CM_ESTABLISHED; |
| 1463 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 1464 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1465 | return 0; |
| 1466 | |
| 1467 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1468 | kfree(data); |
| 1469 | return ret; |
| 1470 | } |
| 1471 | EXPORT_SYMBOL(ib_send_cm_rtu); |
| 1472 | |
| 1473 | static void cm_format_rep_event(struct cm_work *work) |
| 1474 | { |
| 1475 | struct cm_rep_msg *rep_msg; |
| 1476 | struct ib_cm_rep_event_param *param; |
| 1477 | |
| 1478 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1479 | param = &work->cm_event.param.rep_rcvd; |
| 1480 | param->remote_ca_guid = rep_msg->local_ca_guid; |
| 1481 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); |
| 1482 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); |
| 1483 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
| 1484 | param->responder_resources = rep_msg->initiator_depth; |
| 1485 | param->initiator_depth = rep_msg->resp_resources; |
| 1486 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| 1487 | param->failover_accepted = cm_rep_get_failover(rep_msg); |
| 1488 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); |
| 1489 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| 1490 | param->srq = cm_rep_get_srq(rep_msg); |
| 1491 | work->cm_event.private_data = &rep_msg->private_data; |
| 1492 | } |
| 1493 | |
| 1494 | static void cm_dup_rep_handler(struct cm_work *work) |
| 1495 | { |
| 1496 | struct cm_id_private *cm_id_priv; |
| 1497 | struct cm_rep_msg *rep_msg; |
| 1498 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1499 | unsigned long flags; |
| 1500 | int ret; |
| 1501 | |
| 1502 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; |
| 1503 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, |
| 1504 | rep_msg->local_comm_id); |
| 1505 | if (!cm_id_priv) |
| 1506 | return; |
| 1507 | |
| 1508 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1509 | if (ret) |
| 1510 | goto deref; |
| 1511 | |
| 1512 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1513 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
| 1514 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1515 | cm_id_priv->private_data, |
| 1516 | cm_id_priv->private_data_len); |
| 1517 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) |
| 1518 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1519 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, |
| 1520 | cm_id_priv->private_data, |
| 1521 | cm_id_priv->private_data_len); |
| 1522 | else |
| 1523 | goto unlock; |
| 1524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1525 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1526 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1527 | if (ret) |
| 1528 | goto free; |
| 1529 | goto deref; |
| 1530 | |
| 1531 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1532 | free: cm_free_msg(msg); |
| 1533 | deref: cm_deref_id(cm_id_priv); |
| 1534 | } |
| 1535 | |
| 1536 | static int cm_rep_handler(struct cm_work *work) |
| 1537 | { |
| 1538 | struct cm_id_private *cm_id_priv; |
| 1539 | struct cm_rep_msg *rep_msg; |
| 1540 | unsigned long flags; |
| 1541 | int ret; |
| 1542 | |
| 1543 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1544 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); |
| 1545 | if (!cm_id_priv) { |
| 1546 | cm_dup_rep_handler(work); |
| 1547 | return -EINVAL; |
| 1548 | } |
| 1549 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1550 | cm_format_rep_event(work); |
| 1551 | |
| 1552 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1553 | switch (cm_id_priv->id.state) { |
| 1554 | case IB_CM_REQ_SENT: |
| 1555 | case IB_CM_MRA_REQ_RCVD: |
| 1556 | break; |
| 1557 | default: |
| 1558 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1559 | ret = -EINVAL; |
| 1560 | goto error; |
| 1561 | } |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1562 | |
| 1563 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
| 1564 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; |
| 1565 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1566 | |
| 1567 | spin_lock(&cm.lock); |
| 1568 | /* Check for duplicate REP. */ |
| 1569 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { |
| 1570 | spin_unlock(&cm.lock); |
| 1571 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1572 | ret = -EINVAL; |
| 1573 | goto error; |
| 1574 | } |
| 1575 | /* Check for a stale connection. */ |
| 1576 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { |
| 1577 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
| 1578 | &cm.remote_id_table); |
| 1579 | cm_id_priv->timewait_info->inserted_remote_id = 0; |
| 1580 | spin_unlock(&cm.lock); |
| 1581 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1582 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1583 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, |
| 1584 | NULL, 0); |
| 1585 | ret = -EINVAL; |
| 1586 | goto error; |
| 1587 | } |
| 1588 | spin_unlock(&cm.lock); |
| 1589 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1590 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
| 1591 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; |
| 1592 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1593 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
| 1594 | cm_id_priv->responder_resources = rep_msg->initiator_depth; |
| 1595 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1596 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| 1597 | |
| 1598 | /* todo: handle peer_to_peer */ |
| 1599 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1600 | 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] | 1601 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1602 | if (!ret) |
| 1603 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1604 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1605 | |
| 1606 | if (ret) |
| 1607 | cm_process_work(cm_id_priv, work); |
| 1608 | else |
| 1609 | cm_deref_id(cm_id_priv); |
| 1610 | return 0; |
| 1611 | |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1612 | error: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1613 | cm_deref_id(cm_id_priv); |
| 1614 | return ret; |
| 1615 | } |
| 1616 | |
| 1617 | static int cm_establish_handler(struct cm_work *work) |
| 1618 | { |
| 1619 | struct cm_id_private *cm_id_priv; |
| 1620 | unsigned long flags; |
| 1621 | int ret; |
| 1622 | |
| 1623 | /* See comment in ib_cm_establish about lookup. */ |
| 1624 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
| 1625 | if (!cm_id_priv) |
| 1626 | return -EINVAL; |
| 1627 | |
| 1628 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1629 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
| 1630 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1631 | goto out; |
| 1632 | } |
| 1633 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1634 | 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] | 1635 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1636 | if (!ret) |
| 1637 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1638 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1639 | |
| 1640 | if (ret) |
| 1641 | cm_process_work(cm_id_priv, work); |
| 1642 | else |
| 1643 | cm_deref_id(cm_id_priv); |
| 1644 | return 0; |
| 1645 | out: |
| 1646 | cm_deref_id(cm_id_priv); |
| 1647 | return -EINVAL; |
| 1648 | } |
| 1649 | |
| 1650 | static int cm_rtu_handler(struct cm_work *work) |
| 1651 | { |
| 1652 | struct cm_id_private *cm_id_priv; |
| 1653 | struct cm_rtu_msg *rtu_msg; |
| 1654 | unsigned long flags; |
| 1655 | int ret; |
| 1656 | |
| 1657 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1658 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, |
| 1659 | rtu_msg->local_comm_id); |
| 1660 | if (!cm_id_priv) |
| 1661 | return -EINVAL; |
| 1662 | |
| 1663 | work->cm_event.private_data = &rtu_msg->private_data; |
| 1664 | |
| 1665 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1666 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
| 1667 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { |
| 1668 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1669 | goto out; |
| 1670 | } |
| 1671 | cm_id_priv->id.state = IB_CM_ESTABLISHED; |
| 1672 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1673 | 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] | 1674 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1675 | if (!ret) |
| 1676 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1677 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1678 | |
| 1679 | if (ret) |
| 1680 | cm_process_work(cm_id_priv, work); |
| 1681 | else |
| 1682 | cm_deref_id(cm_id_priv); |
| 1683 | return 0; |
| 1684 | out: |
| 1685 | cm_deref_id(cm_id_priv); |
| 1686 | return -EINVAL; |
| 1687 | } |
| 1688 | |
| 1689 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, |
| 1690 | struct cm_id_private *cm_id_priv, |
| 1691 | const void *private_data, |
| 1692 | u8 private_data_len) |
| 1693 | { |
| 1694 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, |
| 1695 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); |
| 1696 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1697 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1698 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); |
| 1699 | |
| 1700 | if (private_data && private_data_len) |
| 1701 | memcpy(dreq_msg->private_data, private_data, private_data_len); |
| 1702 | } |
| 1703 | |
| 1704 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, |
| 1705 | const void *private_data, |
| 1706 | u8 private_data_len) |
| 1707 | { |
| 1708 | struct cm_id_private *cm_id_priv; |
| 1709 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1710 | unsigned long flags; |
| 1711 | int ret; |
| 1712 | |
| 1713 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
| 1714 | return -EINVAL; |
| 1715 | |
| 1716 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1717 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1718 | if (cm_id->state != IB_CM_ESTABLISHED) { |
| 1719 | ret = -EINVAL; |
| 1720 | goto out; |
| 1721 | } |
| 1722 | |
| 1723 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1724 | if (ret) { |
| 1725 | cm_enter_timewait(cm_id_priv); |
| 1726 | goto out; |
| 1727 | } |
| 1728 | |
| 1729 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, |
| 1730 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1731 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1732 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
| 1733 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1734 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1735 | if (ret) { |
| 1736 | cm_enter_timewait(cm_id_priv); |
| 1737 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1738 | cm_free_msg(msg); |
| 1739 | return ret; |
| 1740 | } |
| 1741 | |
| 1742 | cm_id->state = IB_CM_DREQ_SENT; |
| 1743 | cm_id_priv->msg = msg; |
| 1744 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1745 | return ret; |
| 1746 | } |
| 1747 | EXPORT_SYMBOL(ib_send_cm_dreq); |
| 1748 | |
| 1749 | static void cm_format_drep(struct cm_drep_msg *drep_msg, |
| 1750 | struct cm_id_private *cm_id_priv, |
| 1751 | const void *private_data, |
| 1752 | u8 private_data_len) |
| 1753 | { |
| 1754 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); |
| 1755 | drep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1756 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1757 | |
| 1758 | if (private_data && private_data_len) |
| 1759 | memcpy(drep_msg->private_data, private_data, private_data_len); |
| 1760 | } |
| 1761 | |
| 1762 | int ib_send_cm_drep(struct ib_cm_id *cm_id, |
| 1763 | const void *private_data, |
| 1764 | u8 private_data_len) |
| 1765 | { |
| 1766 | struct cm_id_private *cm_id_priv; |
| 1767 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1768 | unsigned long flags; |
| 1769 | void *data; |
| 1770 | int ret; |
| 1771 | |
| 1772 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
| 1773 | return -EINVAL; |
| 1774 | |
| 1775 | data = cm_copy_private_data(private_data, private_data_len); |
| 1776 | if (IS_ERR(data)) |
| 1777 | return PTR_ERR(data); |
| 1778 | |
| 1779 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1780 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1781 | if (cm_id->state != IB_CM_DREQ_RCVD) { |
| 1782 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1783 | kfree(data); |
| 1784 | return -EINVAL; |
| 1785 | } |
| 1786 | |
| 1787 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 1788 | cm_enter_timewait(cm_id_priv); |
| 1789 | |
| 1790 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1791 | if (ret) |
| 1792 | goto out; |
| 1793 | |
| 1794 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 1795 | private_data, private_data_len); |
| 1796 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1797 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1798 | if (ret) { |
| 1799 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1800 | cm_free_msg(msg); |
| 1801 | return ret; |
| 1802 | } |
| 1803 | |
| 1804 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1805 | return ret; |
| 1806 | } |
| 1807 | EXPORT_SYMBOL(ib_send_cm_drep); |
| 1808 | |
| 1809 | static int cm_dreq_handler(struct cm_work *work) |
| 1810 | { |
| 1811 | struct cm_id_private *cm_id_priv; |
| 1812 | struct cm_dreq_msg *dreq_msg; |
| 1813 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1814 | unsigned long flags; |
| 1815 | int ret; |
| 1816 | |
| 1817 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1818 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, |
| 1819 | dreq_msg->local_comm_id); |
| 1820 | if (!cm_id_priv) |
| 1821 | return -EINVAL; |
| 1822 | |
| 1823 | work->cm_event.private_data = &dreq_msg->private_data; |
| 1824 | |
| 1825 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1826 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
| 1827 | goto unlock; |
| 1828 | |
| 1829 | switch (cm_id_priv->id.state) { |
| 1830 | case IB_CM_REP_SENT: |
| 1831 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1832 | 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] | 1833 | break; |
| 1834 | case IB_CM_ESTABLISHED: |
| 1835 | case IB_CM_MRA_REP_RCVD: |
| 1836 | break; |
| 1837 | case IB_CM_TIMEWAIT: |
| 1838 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 1839 | goto unlock; |
| 1840 | |
| 1841 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 1842 | cm_id_priv->private_data, |
| 1843 | cm_id_priv->private_data_len); |
| 1844 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1845 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1846 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1847 | cm_free_msg(msg); |
| 1848 | goto deref; |
| 1849 | default: |
| 1850 | goto unlock; |
| 1851 | } |
| 1852 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; |
| 1853 | cm_id_priv->tid = dreq_msg->hdr.tid; |
| 1854 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1855 | if (!ret) |
| 1856 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1857 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1858 | |
| 1859 | if (ret) |
| 1860 | cm_process_work(cm_id_priv, work); |
| 1861 | else |
| 1862 | cm_deref_id(cm_id_priv); |
| 1863 | return 0; |
| 1864 | |
| 1865 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1866 | deref: cm_deref_id(cm_id_priv); |
| 1867 | return -EINVAL; |
| 1868 | } |
| 1869 | |
| 1870 | static int cm_drep_handler(struct cm_work *work) |
| 1871 | { |
| 1872 | struct cm_id_private *cm_id_priv; |
| 1873 | struct cm_drep_msg *drep_msg; |
| 1874 | unsigned long flags; |
| 1875 | int ret; |
| 1876 | |
| 1877 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1878 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, |
| 1879 | drep_msg->local_comm_id); |
| 1880 | if (!cm_id_priv) |
| 1881 | return -EINVAL; |
| 1882 | |
| 1883 | work->cm_event.private_data = &drep_msg->private_data; |
| 1884 | |
| 1885 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1886 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
| 1887 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
| 1888 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1889 | goto out; |
| 1890 | } |
| 1891 | cm_enter_timewait(cm_id_priv); |
| 1892 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1893 | 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] | 1894 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1895 | if (!ret) |
| 1896 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 1897 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1898 | |
| 1899 | if (ret) |
| 1900 | cm_process_work(cm_id_priv, work); |
| 1901 | else |
| 1902 | cm_deref_id(cm_id_priv); |
| 1903 | return 0; |
| 1904 | out: |
| 1905 | cm_deref_id(cm_id_priv); |
| 1906 | return -EINVAL; |
| 1907 | } |
| 1908 | |
| 1909 | int ib_send_cm_rej(struct ib_cm_id *cm_id, |
| 1910 | enum ib_cm_rej_reason reason, |
| 1911 | void *ari, |
| 1912 | u8 ari_length, |
| 1913 | const void *private_data, |
| 1914 | u8 private_data_len) |
| 1915 | { |
| 1916 | struct cm_id_private *cm_id_priv; |
| 1917 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1918 | unsigned long flags; |
| 1919 | int ret; |
| 1920 | |
| 1921 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
| 1922 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) |
| 1923 | return -EINVAL; |
| 1924 | |
| 1925 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1926 | |
| 1927 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1928 | switch (cm_id->state) { |
| 1929 | case IB_CM_REQ_SENT: |
| 1930 | case IB_CM_MRA_REQ_RCVD: |
| 1931 | case IB_CM_REQ_RCVD: |
| 1932 | case IB_CM_MRA_REQ_SENT: |
| 1933 | case IB_CM_REP_RCVD: |
| 1934 | case IB_CM_MRA_REP_SENT: |
| 1935 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1936 | if (!ret) |
| 1937 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 1938 | cm_id_priv, reason, ari, ari_length, |
| 1939 | private_data, private_data_len); |
| 1940 | |
| 1941 | cm_reset_to_idle(cm_id_priv); |
| 1942 | break; |
| 1943 | case IB_CM_REP_SENT: |
| 1944 | case IB_CM_MRA_REP_RCVD: |
| 1945 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1946 | if (!ret) |
| 1947 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 1948 | cm_id_priv, reason, ari, ari_length, |
| 1949 | private_data, private_data_len); |
| 1950 | |
| 1951 | cm_enter_timewait(cm_id_priv); |
| 1952 | break; |
| 1953 | default: |
| 1954 | ret = -EINVAL; |
| 1955 | goto out; |
| 1956 | } |
| 1957 | |
| 1958 | if (ret) |
| 1959 | goto out; |
| 1960 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1961 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1962 | if (ret) |
| 1963 | cm_free_msg(msg); |
| 1964 | |
| 1965 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1966 | return ret; |
| 1967 | } |
| 1968 | EXPORT_SYMBOL(ib_send_cm_rej); |
| 1969 | |
| 1970 | static void cm_format_rej_event(struct cm_work *work) |
| 1971 | { |
| 1972 | struct cm_rej_msg *rej_msg; |
| 1973 | struct ib_cm_rej_event_param *param; |
| 1974 | |
| 1975 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1976 | param = &work->cm_event.param.rej_rcvd; |
| 1977 | param->ari = rej_msg->ari; |
| 1978 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1979 | param->reason = __be16_to_cpu(rej_msg->reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1980 | work->cm_event.private_data = &rej_msg->private_data; |
| 1981 | } |
| 1982 | |
| 1983 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
| 1984 | { |
| 1985 | struct cm_timewait_info *timewait_info; |
| 1986 | struct cm_id_private *cm_id_priv; |
| 1987 | unsigned long flags; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1988 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1989 | |
| 1990 | remote_id = rej_msg->local_comm_id; |
| 1991 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1992 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1993 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1994 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1995 | remote_id); |
| 1996 | if (!timewait_info) { |
| 1997 | spin_unlock_irqrestore(&cm.lock, flags); |
| 1998 | return NULL; |
| 1999 | } |
| 2000 | cm_id_priv = idr_find(&cm.local_id_table, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2001 | (__force int) timewait_info->work.local_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2002 | if (cm_id_priv) { |
| 2003 | if (cm_id_priv->id.remote_id == remote_id) |
| 2004 | atomic_inc(&cm_id_priv->refcount); |
| 2005 | else |
| 2006 | cm_id_priv = NULL; |
| 2007 | } |
| 2008 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2009 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
| 2010 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); |
| 2011 | else |
| 2012 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); |
| 2013 | |
| 2014 | return cm_id_priv; |
| 2015 | } |
| 2016 | |
| 2017 | static int cm_rej_handler(struct cm_work *work) |
| 2018 | { |
| 2019 | struct cm_id_private *cm_id_priv; |
| 2020 | struct cm_rej_msg *rej_msg; |
| 2021 | unsigned long flags; |
| 2022 | int ret; |
| 2023 | |
| 2024 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2025 | cm_id_priv = cm_acquire_rejected_id(rej_msg); |
| 2026 | if (!cm_id_priv) |
| 2027 | return -EINVAL; |
| 2028 | |
| 2029 | cm_format_rej_event(work); |
| 2030 | |
| 2031 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2032 | switch (cm_id_priv->id.state) { |
| 2033 | case IB_CM_REQ_SENT: |
| 2034 | case IB_CM_MRA_REQ_RCVD: |
| 2035 | case IB_CM_REP_SENT: |
| 2036 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2037 | 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] | 2038 | /* fall through */ |
| 2039 | case IB_CM_REQ_RCVD: |
| 2040 | case IB_CM_MRA_REQ_SENT: |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2041 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2042 | cm_enter_timewait(cm_id_priv); |
| 2043 | else |
| 2044 | cm_reset_to_idle(cm_id_priv); |
| 2045 | break; |
| 2046 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2047 | 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] | 2048 | /* fall through */ |
| 2049 | case IB_CM_REP_RCVD: |
| 2050 | case IB_CM_MRA_REP_SENT: |
| 2051 | case IB_CM_ESTABLISHED: |
| 2052 | cm_enter_timewait(cm_id_priv); |
| 2053 | break; |
| 2054 | default: |
| 2055 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2056 | ret = -EINVAL; |
| 2057 | goto out; |
| 2058 | } |
| 2059 | |
| 2060 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2061 | if (!ret) |
| 2062 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2063 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2064 | |
| 2065 | if (ret) |
| 2066 | cm_process_work(cm_id_priv, work); |
| 2067 | else |
| 2068 | cm_deref_id(cm_id_priv); |
| 2069 | return 0; |
| 2070 | out: |
| 2071 | cm_deref_id(cm_id_priv); |
| 2072 | return -EINVAL; |
| 2073 | } |
| 2074 | |
| 2075 | int ib_send_cm_mra(struct ib_cm_id *cm_id, |
| 2076 | u8 service_timeout, |
| 2077 | const void *private_data, |
| 2078 | u8 private_data_len) |
| 2079 | { |
| 2080 | struct cm_id_private *cm_id_priv; |
| 2081 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2082 | void *data; |
| 2083 | unsigned long flags; |
| 2084 | int ret; |
| 2085 | |
| 2086 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) |
| 2087 | return -EINVAL; |
| 2088 | |
| 2089 | data = cm_copy_private_data(private_data, private_data_len); |
| 2090 | if (IS_ERR(data)) |
| 2091 | return PTR_ERR(data); |
| 2092 | |
| 2093 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2094 | |
| 2095 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2096 | switch(cm_id_priv->id.state) { |
| 2097 | case IB_CM_REQ_RCVD: |
| 2098 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2099 | if (ret) |
| 2100 | goto error1; |
| 2101 | |
| 2102 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2103 | CM_MSG_RESPONSE_REQ, service_timeout, |
| 2104 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2105 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2106 | if (ret) |
| 2107 | goto error2; |
| 2108 | cm_id->state = IB_CM_MRA_REQ_SENT; |
| 2109 | break; |
| 2110 | case IB_CM_REP_RCVD: |
| 2111 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2112 | if (ret) |
| 2113 | goto error1; |
| 2114 | |
| 2115 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2116 | CM_MSG_RESPONSE_REP, service_timeout, |
| 2117 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2118 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2119 | if (ret) |
| 2120 | goto error2; |
| 2121 | cm_id->state = IB_CM_MRA_REP_SENT; |
| 2122 | break; |
| 2123 | case IB_CM_ESTABLISHED: |
| 2124 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2125 | if (ret) |
| 2126 | goto error1; |
| 2127 | |
| 2128 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2129 | CM_MSG_RESPONSE_OTHER, service_timeout, |
| 2130 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2131 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2132 | if (ret) |
| 2133 | goto error2; |
| 2134 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; |
| 2135 | break; |
| 2136 | default: |
| 2137 | ret = -EINVAL; |
| 2138 | goto error1; |
| 2139 | } |
| 2140 | cm_id_priv->service_timeout = service_timeout; |
| 2141 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 2142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2143 | return 0; |
| 2144 | |
| 2145 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2146 | kfree(data); |
| 2147 | return ret; |
| 2148 | |
| 2149 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2150 | kfree(data); |
| 2151 | cm_free_msg(msg); |
| 2152 | return ret; |
| 2153 | } |
| 2154 | EXPORT_SYMBOL(ib_send_cm_mra); |
| 2155 | |
| 2156 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) |
| 2157 | { |
| 2158 | switch (cm_mra_get_msg_mraed(mra_msg)) { |
| 2159 | case CM_MSG_RESPONSE_REQ: |
| 2160 | return cm_acquire_id(mra_msg->remote_comm_id, 0); |
| 2161 | case CM_MSG_RESPONSE_REP: |
| 2162 | case CM_MSG_RESPONSE_OTHER: |
| 2163 | return cm_acquire_id(mra_msg->remote_comm_id, |
| 2164 | mra_msg->local_comm_id); |
| 2165 | default: |
| 2166 | return NULL; |
| 2167 | } |
| 2168 | } |
| 2169 | |
| 2170 | static int cm_mra_handler(struct cm_work *work) |
| 2171 | { |
| 2172 | struct cm_id_private *cm_id_priv; |
| 2173 | struct cm_mra_msg *mra_msg; |
| 2174 | unsigned long flags; |
| 2175 | int timeout, ret; |
| 2176 | |
| 2177 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2178 | cm_id_priv = cm_acquire_mraed_id(mra_msg); |
| 2179 | if (!cm_id_priv) |
| 2180 | return -EINVAL; |
| 2181 | |
| 2182 | work->cm_event.private_data = &mra_msg->private_data; |
| 2183 | work->cm_event.param.mra_rcvd.service_timeout = |
| 2184 | cm_mra_get_service_timeout(mra_msg); |
| 2185 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + |
| 2186 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); |
| 2187 | |
| 2188 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2189 | switch (cm_id_priv->id.state) { |
| 2190 | case IB_CM_REQ_SENT: |
| 2191 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || |
| 2192 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2193 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2194 | goto out; |
| 2195 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; |
| 2196 | break; |
| 2197 | case IB_CM_REP_SENT: |
| 2198 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || |
| 2199 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2200 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2201 | goto out; |
| 2202 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; |
| 2203 | break; |
| 2204 | case IB_CM_ESTABLISHED: |
| 2205 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || |
| 2206 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || |
| 2207 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2208 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2209 | goto out; |
| 2210 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
| 2211 | break; |
| 2212 | default: |
| 2213 | goto out; |
| 2214 | } |
| 2215 | |
| 2216 | cm_id_priv->msg->context[1] = (void *) (unsigned long) |
| 2217 | cm_id_priv->id.state; |
| 2218 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2219 | if (!ret) |
| 2220 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2221 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2222 | |
| 2223 | if (ret) |
| 2224 | cm_process_work(cm_id_priv, work); |
| 2225 | else |
| 2226 | cm_deref_id(cm_id_priv); |
| 2227 | return 0; |
| 2228 | out: |
| 2229 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2230 | cm_deref_id(cm_id_priv); |
| 2231 | return -EINVAL; |
| 2232 | } |
| 2233 | |
| 2234 | static void cm_format_lap(struct cm_lap_msg *lap_msg, |
| 2235 | struct cm_id_private *cm_id_priv, |
| 2236 | struct ib_sa_path_rec *alternate_path, |
| 2237 | const void *private_data, |
| 2238 | u8 private_data_len) |
| 2239 | { |
| 2240 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, |
| 2241 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); |
| 2242 | lap_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2243 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2244 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); |
| 2245 | /* todo: need remote CM response timeout */ |
| 2246 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); |
| 2247 | lap_msg->alt_local_lid = alternate_path->slid; |
| 2248 | lap_msg->alt_remote_lid = alternate_path->dlid; |
| 2249 | lap_msg->alt_local_gid = alternate_path->sgid; |
| 2250 | lap_msg->alt_remote_gid = alternate_path->dgid; |
| 2251 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); |
| 2252 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); |
| 2253 | lap_msg->alt_hop_limit = alternate_path->hop_limit; |
| 2254 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); |
| 2255 | cm_lap_set_sl(lap_msg, alternate_path->sl); |
| 2256 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ |
| 2257 | cm_lap_set_local_ack_timeout(lap_msg, |
| 2258 | min(31, alternate_path->packet_life_time + 1)); |
| 2259 | |
| 2260 | if (private_data && private_data_len) |
| 2261 | memcpy(lap_msg->private_data, private_data, private_data_len); |
| 2262 | } |
| 2263 | |
| 2264 | int ib_send_cm_lap(struct ib_cm_id *cm_id, |
| 2265 | struct ib_sa_path_rec *alternate_path, |
| 2266 | const void *private_data, |
| 2267 | u8 private_data_len) |
| 2268 | { |
| 2269 | struct cm_id_private *cm_id_priv; |
| 2270 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2271 | unsigned long flags; |
| 2272 | int ret; |
| 2273 | |
| 2274 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) |
| 2275 | return -EINVAL; |
| 2276 | |
| 2277 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2278 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2279 | if (cm_id->state != IB_CM_ESTABLISHED || |
| 2280 | cm_id->lap_state != IB_CM_LAP_IDLE) { |
| 2281 | ret = -EINVAL; |
| 2282 | goto out; |
| 2283 | } |
| 2284 | |
| 2285 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2286 | if (ret) |
| 2287 | goto out; |
| 2288 | |
| 2289 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, |
| 2290 | alternate_path, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2291 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2292 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
| 2293 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2294 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2295 | if (ret) { |
| 2296 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2297 | cm_free_msg(msg); |
| 2298 | return ret; |
| 2299 | } |
| 2300 | |
| 2301 | cm_id->lap_state = IB_CM_LAP_SENT; |
| 2302 | cm_id_priv->msg = msg; |
| 2303 | |
| 2304 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2305 | return ret; |
| 2306 | } |
| 2307 | EXPORT_SYMBOL(ib_send_cm_lap); |
| 2308 | |
| 2309 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, |
| 2310 | struct cm_lap_msg *lap_msg) |
| 2311 | { |
| 2312 | memset(path, 0, sizeof *path); |
| 2313 | path->dgid = lap_msg->alt_local_gid; |
| 2314 | path->sgid = lap_msg->alt_remote_gid; |
| 2315 | path->dlid = lap_msg->alt_local_lid; |
| 2316 | path->slid = lap_msg->alt_remote_lid; |
| 2317 | path->flow_label = cm_lap_get_flow_label(lap_msg); |
| 2318 | path->hop_limit = lap_msg->alt_hop_limit; |
| 2319 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); |
| 2320 | path->reversible = 1; |
| 2321 | /* pkey is same as in REQ */ |
| 2322 | path->sl = cm_lap_get_sl(lap_msg); |
| 2323 | path->mtu_selector = IB_SA_EQ; |
| 2324 | /* mtu is same as in REQ */ |
| 2325 | path->rate_selector = IB_SA_EQ; |
| 2326 | path->rate = cm_lap_get_packet_rate(lap_msg); |
| 2327 | path->packet_life_time_selector = IB_SA_EQ; |
| 2328 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); |
| 2329 | path->packet_life_time -= (path->packet_life_time > 0); |
| 2330 | } |
| 2331 | |
| 2332 | static int cm_lap_handler(struct cm_work *work) |
| 2333 | { |
| 2334 | struct cm_id_private *cm_id_priv; |
| 2335 | struct cm_lap_msg *lap_msg; |
| 2336 | struct ib_cm_lap_event_param *param; |
| 2337 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2338 | unsigned long flags; |
| 2339 | int ret; |
| 2340 | |
| 2341 | /* todo: verify LAP request and send reject APR if invalid. */ |
| 2342 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2343 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, |
| 2344 | lap_msg->local_comm_id); |
| 2345 | if (!cm_id_priv) |
| 2346 | return -EINVAL; |
| 2347 | |
| 2348 | param = &work->cm_event.param.lap_rcvd; |
| 2349 | param->alternate_path = &work->path[0]; |
| 2350 | cm_format_path_from_lap(param->alternate_path, lap_msg); |
| 2351 | work->cm_event.private_data = &lap_msg->private_data; |
| 2352 | |
| 2353 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2354 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
| 2355 | goto unlock; |
| 2356 | |
| 2357 | switch (cm_id_priv->id.lap_state) { |
| 2358 | case IB_CM_LAP_IDLE: |
| 2359 | break; |
| 2360 | case IB_CM_MRA_LAP_SENT: |
| 2361 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 2362 | goto unlock; |
| 2363 | |
| 2364 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2365 | CM_MSG_RESPONSE_OTHER, |
| 2366 | cm_id_priv->service_timeout, |
| 2367 | cm_id_priv->private_data, |
| 2368 | cm_id_priv->private_data_len); |
| 2369 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2370 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2371 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2372 | cm_free_msg(msg); |
| 2373 | goto deref; |
| 2374 | default: |
| 2375 | goto unlock; |
| 2376 | } |
| 2377 | |
| 2378 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; |
| 2379 | cm_id_priv->tid = lap_msg->hdr.tid; |
| 2380 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2381 | if (!ret) |
| 2382 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2383 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2384 | |
| 2385 | if (ret) |
| 2386 | cm_process_work(cm_id_priv, work); |
| 2387 | else |
| 2388 | cm_deref_id(cm_id_priv); |
| 2389 | return 0; |
| 2390 | |
| 2391 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2392 | deref: cm_deref_id(cm_id_priv); |
| 2393 | return -EINVAL; |
| 2394 | } |
| 2395 | |
| 2396 | static void cm_format_apr(struct cm_apr_msg *apr_msg, |
| 2397 | struct cm_id_private *cm_id_priv, |
| 2398 | enum ib_cm_apr_status status, |
| 2399 | void *info, |
| 2400 | u8 info_length, |
| 2401 | const void *private_data, |
| 2402 | u8 private_data_len) |
| 2403 | { |
| 2404 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); |
| 2405 | apr_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2406 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2407 | apr_msg->ap_status = (u8) status; |
| 2408 | |
| 2409 | if (info && info_length) { |
| 2410 | apr_msg->info_length = info_length; |
| 2411 | memcpy(apr_msg->info, info, info_length); |
| 2412 | } |
| 2413 | |
| 2414 | if (private_data && private_data_len) |
| 2415 | memcpy(apr_msg->private_data, private_data, private_data_len); |
| 2416 | } |
| 2417 | |
| 2418 | int ib_send_cm_apr(struct ib_cm_id *cm_id, |
| 2419 | enum ib_cm_apr_status status, |
| 2420 | void *info, |
| 2421 | u8 info_length, |
| 2422 | const void *private_data, |
| 2423 | u8 private_data_len) |
| 2424 | { |
| 2425 | struct cm_id_private *cm_id_priv; |
| 2426 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2427 | unsigned long flags; |
| 2428 | int ret; |
| 2429 | |
| 2430 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || |
| 2431 | (info && info_length > IB_CM_APR_INFO_LENGTH)) |
| 2432 | return -EINVAL; |
| 2433 | |
| 2434 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2435 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2436 | if (cm_id->state != IB_CM_ESTABLISHED || |
| 2437 | (cm_id->lap_state != IB_CM_LAP_RCVD && |
| 2438 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { |
| 2439 | ret = -EINVAL; |
| 2440 | goto out; |
| 2441 | } |
| 2442 | |
| 2443 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2444 | if (ret) |
| 2445 | goto out; |
| 2446 | |
| 2447 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, |
| 2448 | info, info_length, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2449 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2450 | if (ret) { |
| 2451 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2452 | cm_free_msg(msg); |
| 2453 | return ret; |
| 2454 | } |
| 2455 | |
| 2456 | cm_id->lap_state = IB_CM_LAP_IDLE; |
| 2457 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2458 | return ret; |
| 2459 | } |
| 2460 | EXPORT_SYMBOL(ib_send_cm_apr); |
| 2461 | |
| 2462 | static int cm_apr_handler(struct cm_work *work) |
| 2463 | { |
| 2464 | struct cm_id_private *cm_id_priv; |
| 2465 | struct cm_apr_msg *apr_msg; |
| 2466 | unsigned long flags; |
| 2467 | int ret; |
| 2468 | |
| 2469 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2470 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, |
| 2471 | apr_msg->local_comm_id); |
| 2472 | if (!cm_id_priv) |
| 2473 | return -EINVAL; /* Unmatched reply. */ |
| 2474 | |
| 2475 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; |
| 2476 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; |
| 2477 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; |
| 2478 | work->cm_event.private_data = &apr_msg->private_data; |
| 2479 | |
| 2480 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2481 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
| 2482 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && |
| 2483 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { |
| 2484 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2485 | goto out; |
| 2486 | } |
| 2487 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2488 | 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] | 2489 | cm_id_priv->msg = NULL; |
| 2490 | |
| 2491 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2492 | if (!ret) |
| 2493 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2494 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2495 | |
| 2496 | if (ret) |
| 2497 | cm_process_work(cm_id_priv, work); |
| 2498 | else |
| 2499 | cm_deref_id(cm_id_priv); |
| 2500 | return 0; |
| 2501 | out: |
| 2502 | cm_deref_id(cm_id_priv); |
| 2503 | return -EINVAL; |
| 2504 | } |
| 2505 | |
| 2506 | static int cm_timewait_handler(struct cm_work *work) |
| 2507 | { |
| 2508 | struct cm_timewait_info *timewait_info; |
| 2509 | struct cm_id_private *cm_id_priv; |
| 2510 | unsigned long flags; |
| 2511 | int ret; |
| 2512 | |
| 2513 | timewait_info = (struct cm_timewait_info *)work; |
| 2514 | cm_cleanup_timewait(timewait_info); |
| 2515 | |
| 2516 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
| 2517 | timewait_info->work.remote_id); |
| 2518 | if (!cm_id_priv) |
| 2519 | return -EINVAL; |
| 2520 | |
| 2521 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2522 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
| 2523 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { |
| 2524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2525 | goto out; |
| 2526 | } |
| 2527 | cm_id_priv->id.state = IB_CM_IDLE; |
| 2528 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2529 | if (!ret) |
| 2530 | list_add_tail(&work->list, &cm_id_priv->work_list); |
| 2531 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2532 | |
| 2533 | if (ret) |
| 2534 | cm_process_work(cm_id_priv, work); |
| 2535 | else |
| 2536 | cm_deref_id(cm_id_priv); |
| 2537 | return 0; |
| 2538 | out: |
| 2539 | cm_deref_id(cm_id_priv); |
| 2540 | return -EINVAL; |
| 2541 | } |
| 2542 | |
| 2543 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, |
| 2544 | struct cm_id_private *cm_id_priv, |
| 2545 | struct ib_cm_sidr_req_param *param) |
| 2546 | { |
| 2547 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, |
| 2548 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); |
| 2549 | sidr_req_msg->request_id = cm_id_priv->id.local_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2550 | sidr_req_msg->pkey = cpu_to_be16(param->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2551 | sidr_req_msg->service_id = param->service_id; |
| 2552 | |
| 2553 | if (param->private_data && param->private_data_len) |
| 2554 | memcpy(sidr_req_msg->private_data, param->private_data, |
| 2555 | param->private_data_len); |
| 2556 | } |
| 2557 | |
| 2558 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, |
| 2559 | struct ib_cm_sidr_req_param *param) |
| 2560 | { |
| 2561 | struct cm_id_private *cm_id_priv; |
| 2562 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2563 | unsigned long flags; |
| 2564 | int ret; |
| 2565 | |
| 2566 | if (!param->path || (param->private_data && |
| 2567 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) |
| 2568 | return -EINVAL; |
| 2569 | |
| 2570 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2571 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); |
| 2572 | if (ret) |
| 2573 | goto out; |
| 2574 | |
| 2575 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2576 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2577 | cm_id_priv->timeout_ms = param->timeout_ms; |
| 2578 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 2579 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2580 | if (ret) |
| 2581 | goto out; |
| 2582 | |
| 2583 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, |
| 2584 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2585 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2586 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
| 2587 | |
| 2588 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2589 | if (cm_id->state == IB_CM_IDLE) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2590 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2591 | else |
| 2592 | ret = -EINVAL; |
| 2593 | |
| 2594 | if (ret) { |
| 2595 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2596 | cm_free_msg(msg); |
| 2597 | goto out; |
| 2598 | } |
| 2599 | cm_id->state = IB_CM_SIDR_REQ_SENT; |
| 2600 | cm_id_priv->msg = msg; |
| 2601 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2602 | out: |
| 2603 | return ret; |
| 2604 | } |
| 2605 | EXPORT_SYMBOL(ib_send_cm_sidr_req); |
| 2606 | |
| 2607 | static void cm_format_sidr_req_event(struct cm_work *work, |
| 2608 | struct ib_cm_id *listen_id) |
| 2609 | { |
| 2610 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2611 | struct ib_cm_sidr_req_event_param *param; |
| 2612 | |
| 2613 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2614 | work->mad_recv_wc->recv_buf.mad; |
| 2615 | param = &work->cm_event.param.sidr_req_rcvd; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2616 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2617 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2618 | param->port = work->port->port_num; |
| 2619 | work->cm_event.private_data = &sidr_req_msg->private_data; |
| 2620 | } |
| 2621 | |
| 2622 | static int cm_sidr_req_handler(struct cm_work *work) |
| 2623 | { |
| 2624 | struct ib_cm_id *cm_id; |
| 2625 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 2626 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2627 | struct ib_wc *wc; |
| 2628 | unsigned long flags; |
| 2629 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2630 | 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] | 2631 | if (IS_ERR(cm_id)) |
| 2632 | return PTR_ERR(cm_id); |
| 2633 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2634 | |
| 2635 | /* Record SGID/SLID and request ID for lookup. */ |
| 2636 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2637 | work->mad_recv_wc->recv_buf.mad; |
| 2638 | wc = work->mad_recv_wc->wc; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2639 | 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] | 2640 | cm_id_priv->av.dgid.global.interface_id = 0; |
| 2641 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| 2642 | &cm_id_priv->av); |
| 2643 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; |
| 2644 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
| 2645 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
| 2646 | atomic_inc(&cm_id_priv->work_count); |
| 2647 | |
| 2648 | spin_lock_irqsave(&cm.lock, flags); |
| 2649 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
| 2650 | if (cur_cm_id_priv) { |
| 2651 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2652 | goto out; /* Duplicate message. */ |
| 2653 | } |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2654 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
| 2655 | sidr_req_msg->service_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2656 | if (!cur_cm_id_priv) { |
| 2657 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 2658 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2659 | /* todo: reply with no match */ |
| 2660 | goto out; /* No match. */ |
| 2661 | } |
| 2662 | atomic_inc(&cur_cm_id_priv->refcount); |
| 2663 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2664 | |
| 2665 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; |
| 2666 | cm_id_priv->id.context = cur_cm_id_priv->id.context; |
| 2667 | cm_id_priv->id.service_id = sidr_req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2668 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2669 | |
| 2670 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); |
| 2671 | cm_process_work(cm_id_priv, work); |
| 2672 | cm_deref_id(cur_cm_id_priv); |
| 2673 | return 0; |
| 2674 | out: |
| 2675 | ib_destroy_cm_id(&cm_id_priv->id); |
| 2676 | return -EINVAL; |
| 2677 | } |
| 2678 | |
| 2679 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, |
| 2680 | struct cm_id_private *cm_id_priv, |
| 2681 | struct ib_cm_sidr_rep_param *param) |
| 2682 | { |
| 2683 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
| 2684 | cm_id_priv->tid); |
| 2685 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; |
| 2686 | sidr_rep_msg->status = param->status; |
| 2687 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); |
| 2688 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; |
| 2689 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); |
| 2690 | |
| 2691 | if (param->info && param->info_length) |
| 2692 | memcpy(sidr_rep_msg->info, param->info, param->info_length); |
| 2693 | |
| 2694 | if (param->private_data && param->private_data_len) |
| 2695 | memcpy(sidr_rep_msg->private_data, param->private_data, |
| 2696 | param->private_data_len); |
| 2697 | } |
| 2698 | |
| 2699 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
| 2700 | struct ib_cm_sidr_rep_param *param) |
| 2701 | { |
| 2702 | struct cm_id_private *cm_id_priv; |
| 2703 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2704 | unsigned long flags; |
| 2705 | int ret; |
| 2706 | |
| 2707 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || |
| 2708 | (param->private_data && |
| 2709 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) |
| 2710 | return -EINVAL; |
| 2711 | |
| 2712 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2713 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2714 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { |
| 2715 | ret = -EINVAL; |
| 2716 | goto error; |
| 2717 | } |
| 2718 | |
| 2719 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2720 | if (ret) |
| 2721 | goto error; |
| 2722 | |
| 2723 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, |
| 2724 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2725 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2726 | if (ret) { |
| 2727 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2728 | cm_free_msg(msg); |
| 2729 | return ret; |
| 2730 | } |
| 2731 | cm_id->state = IB_CM_IDLE; |
| 2732 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2733 | |
| 2734 | spin_lock_irqsave(&cm.lock, flags); |
| 2735 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 2736 | spin_unlock_irqrestore(&cm.lock, flags); |
| 2737 | return 0; |
| 2738 | |
| 2739 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2740 | return ret; |
| 2741 | } |
| 2742 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); |
| 2743 | |
| 2744 | static void cm_format_sidr_rep_event(struct cm_work *work) |
| 2745 | { |
| 2746 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 2747 | struct ib_cm_sidr_rep_event_param *param; |
| 2748 | |
| 2749 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 2750 | work->mad_recv_wc->recv_buf.mad; |
| 2751 | param = &work->cm_event.param.sidr_rep_rcvd; |
| 2752 | param->status = sidr_rep_msg->status; |
| 2753 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); |
| 2754 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); |
| 2755 | param->info = &sidr_rep_msg->info; |
| 2756 | param->info_len = sidr_rep_msg->info_length; |
| 2757 | work->cm_event.private_data = &sidr_rep_msg->private_data; |
| 2758 | } |
| 2759 | |
| 2760 | static int cm_sidr_rep_handler(struct cm_work *work) |
| 2761 | { |
| 2762 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 2763 | struct cm_id_private *cm_id_priv; |
| 2764 | unsigned long flags; |
| 2765 | |
| 2766 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 2767 | work->mad_recv_wc->recv_buf.mad; |
| 2768 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); |
| 2769 | if (!cm_id_priv) |
| 2770 | return -EINVAL; /* Unmatched reply. */ |
| 2771 | |
| 2772 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2773 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
| 2774 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2775 | goto out; |
| 2776 | } |
| 2777 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2778 | 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] | 2779 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2780 | |
| 2781 | cm_format_sidr_rep_event(work); |
| 2782 | cm_process_work(cm_id_priv, work); |
| 2783 | return 0; |
| 2784 | out: |
| 2785 | cm_deref_id(cm_id_priv); |
| 2786 | return -EINVAL; |
| 2787 | } |
| 2788 | |
| 2789 | static void cm_process_send_error(struct ib_mad_send_buf *msg, |
| 2790 | enum ib_wc_status wc_status) |
| 2791 | { |
| 2792 | struct cm_id_private *cm_id_priv; |
| 2793 | struct ib_cm_event cm_event; |
| 2794 | enum ib_cm_state state; |
| 2795 | unsigned long flags; |
| 2796 | int ret; |
| 2797 | |
| 2798 | memset(&cm_event, 0, sizeof cm_event); |
| 2799 | cm_id_priv = msg->context[0]; |
| 2800 | |
| 2801 | /* Discard old sends or ones without a response. */ |
| 2802 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2803 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
| 2804 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) |
| 2805 | goto discard; |
| 2806 | |
| 2807 | switch (state) { |
| 2808 | case IB_CM_REQ_SENT: |
| 2809 | case IB_CM_MRA_REQ_RCVD: |
| 2810 | cm_reset_to_idle(cm_id_priv); |
| 2811 | cm_event.event = IB_CM_REQ_ERROR; |
| 2812 | break; |
| 2813 | case IB_CM_REP_SENT: |
| 2814 | case IB_CM_MRA_REP_RCVD: |
| 2815 | cm_reset_to_idle(cm_id_priv); |
| 2816 | cm_event.event = IB_CM_REP_ERROR; |
| 2817 | break; |
| 2818 | case IB_CM_DREQ_SENT: |
| 2819 | cm_enter_timewait(cm_id_priv); |
| 2820 | cm_event.event = IB_CM_DREQ_ERROR; |
| 2821 | break; |
| 2822 | case IB_CM_SIDR_REQ_SENT: |
| 2823 | cm_id_priv->id.state = IB_CM_IDLE; |
| 2824 | cm_event.event = IB_CM_SIDR_REQ_ERROR; |
| 2825 | break; |
| 2826 | default: |
| 2827 | goto discard; |
| 2828 | } |
| 2829 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2830 | cm_event.param.send_status = wc_status; |
| 2831 | |
| 2832 | /* No other events can occur on the cm_id at this point. */ |
| 2833 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); |
| 2834 | cm_free_msg(msg); |
| 2835 | if (ret) |
| 2836 | ib_destroy_cm_id(&cm_id_priv->id); |
| 2837 | return; |
| 2838 | discard: |
| 2839 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2840 | cm_free_msg(msg); |
| 2841 | } |
| 2842 | |
| 2843 | static void cm_send_handler(struct ib_mad_agent *mad_agent, |
| 2844 | struct ib_mad_send_wc *mad_send_wc) |
| 2845 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2846 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2847 | |
| 2848 | switch (mad_send_wc->status) { |
| 2849 | case IB_WC_SUCCESS: |
| 2850 | case IB_WC_WR_FLUSH_ERR: |
| 2851 | cm_free_msg(msg); |
| 2852 | break; |
| 2853 | default: |
| 2854 | if (msg->context[0] && msg->context[1]) |
| 2855 | cm_process_send_error(msg, mad_send_wc->status); |
| 2856 | else |
| 2857 | cm_free_msg(msg); |
| 2858 | break; |
| 2859 | } |
| 2860 | } |
| 2861 | |
| 2862 | static void cm_work_handler(void *data) |
| 2863 | { |
| 2864 | struct cm_work *work = data; |
| 2865 | int ret; |
| 2866 | |
| 2867 | switch (work->cm_event.event) { |
| 2868 | case IB_CM_REQ_RECEIVED: |
| 2869 | ret = cm_req_handler(work); |
| 2870 | break; |
| 2871 | case IB_CM_MRA_RECEIVED: |
| 2872 | ret = cm_mra_handler(work); |
| 2873 | break; |
| 2874 | case IB_CM_REJ_RECEIVED: |
| 2875 | ret = cm_rej_handler(work); |
| 2876 | break; |
| 2877 | case IB_CM_REP_RECEIVED: |
| 2878 | ret = cm_rep_handler(work); |
| 2879 | break; |
| 2880 | case IB_CM_RTU_RECEIVED: |
| 2881 | ret = cm_rtu_handler(work); |
| 2882 | break; |
| 2883 | case IB_CM_USER_ESTABLISHED: |
| 2884 | ret = cm_establish_handler(work); |
| 2885 | break; |
| 2886 | case IB_CM_DREQ_RECEIVED: |
| 2887 | ret = cm_dreq_handler(work); |
| 2888 | break; |
| 2889 | case IB_CM_DREP_RECEIVED: |
| 2890 | ret = cm_drep_handler(work); |
| 2891 | break; |
| 2892 | case IB_CM_SIDR_REQ_RECEIVED: |
| 2893 | ret = cm_sidr_req_handler(work); |
| 2894 | break; |
| 2895 | case IB_CM_SIDR_REP_RECEIVED: |
| 2896 | ret = cm_sidr_rep_handler(work); |
| 2897 | break; |
| 2898 | case IB_CM_LAP_RECEIVED: |
| 2899 | ret = cm_lap_handler(work); |
| 2900 | break; |
| 2901 | case IB_CM_APR_RECEIVED: |
| 2902 | ret = cm_apr_handler(work); |
| 2903 | break; |
| 2904 | case IB_CM_TIMEWAIT_EXIT: |
| 2905 | ret = cm_timewait_handler(work); |
| 2906 | break; |
| 2907 | default: |
| 2908 | ret = -EINVAL; |
| 2909 | break; |
| 2910 | } |
| 2911 | if (ret) |
| 2912 | cm_free_work(work); |
| 2913 | } |
| 2914 | |
| 2915 | int ib_cm_establish(struct ib_cm_id *cm_id) |
| 2916 | { |
| 2917 | struct cm_id_private *cm_id_priv; |
| 2918 | struct cm_work *work; |
| 2919 | unsigned long flags; |
| 2920 | int ret = 0; |
| 2921 | |
| 2922 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
| 2923 | if (!work) |
| 2924 | return -ENOMEM; |
| 2925 | |
| 2926 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2927 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2928 | switch (cm_id->state) |
| 2929 | { |
| 2930 | case IB_CM_REP_SENT: |
| 2931 | case IB_CM_MRA_REP_RCVD: |
| 2932 | cm_id->state = IB_CM_ESTABLISHED; |
| 2933 | break; |
| 2934 | case IB_CM_ESTABLISHED: |
| 2935 | ret = -EISCONN; |
| 2936 | break; |
| 2937 | default: |
| 2938 | ret = -EINVAL; |
| 2939 | break; |
| 2940 | } |
| 2941 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2942 | |
| 2943 | if (ret) { |
| 2944 | kfree(work); |
| 2945 | goto out; |
| 2946 | } |
| 2947 | |
| 2948 | /* |
| 2949 | * The CM worker thread may try to destroy the cm_id before it |
| 2950 | * can execute this work item. To prevent potential deadlock, |
| 2951 | * we need to find the cm_id once we're in the context of the |
| 2952 | * worker thread, rather than holding a reference on it. |
| 2953 | */ |
| 2954 | INIT_WORK(&work->work, cm_work_handler, work); |
| 2955 | work->local_id = cm_id->local_id; |
| 2956 | work->remote_id = cm_id->remote_id; |
| 2957 | work->mad_recv_wc = NULL; |
| 2958 | work->cm_event.event = IB_CM_USER_ESTABLISHED; |
| 2959 | queue_work(cm.wq, &work->work); |
| 2960 | out: |
| 2961 | return ret; |
| 2962 | } |
| 2963 | EXPORT_SYMBOL(ib_cm_establish); |
| 2964 | |
| 2965 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, |
| 2966 | struct ib_mad_recv_wc *mad_recv_wc) |
| 2967 | { |
| 2968 | struct cm_work *work; |
| 2969 | enum ib_cm_event_type event; |
| 2970 | int paths = 0; |
| 2971 | |
| 2972 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { |
| 2973 | case CM_REQ_ATTR_ID: |
| 2974 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> |
| 2975 | alt_local_lid != 0); |
| 2976 | event = IB_CM_REQ_RECEIVED; |
| 2977 | break; |
| 2978 | case CM_MRA_ATTR_ID: |
| 2979 | event = IB_CM_MRA_RECEIVED; |
| 2980 | break; |
| 2981 | case CM_REJ_ATTR_ID: |
| 2982 | event = IB_CM_REJ_RECEIVED; |
| 2983 | break; |
| 2984 | case CM_REP_ATTR_ID: |
| 2985 | event = IB_CM_REP_RECEIVED; |
| 2986 | break; |
| 2987 | case CM_RTU_ATTR_ID: |
| 2988 | event = IB_CM_RTU_RECEIVED; |
| 2989 | break; |
| 2990 | case CM_DREQ_ATTR_ID: |
| 2991 | event = IB_CM_DREQ_RECEIVED; |
| 2992 | break; |
| 2993 | case CM_DREP_ATTR_ID: |
| 2994 | event = IB_CM_DREP_RECEIVED; |
| 2995 | break; |
| 2996 | case CM_SIDR_REQ_ATTR_ID: |
| 2997 | event = IB_CM_SIDR_REQ_RECEIVED; |
| 2998 | break; |
| 2999 | case CM_SIDR_REP_ATTR_ID: |
| 3000 | event = IB_CM_SIDR_REP_RECEIVED; |
| 3001 | break; |
| 3002 | case CM_LAP_ATTR_ID: |
| 3003 | paths = 1; |
| 3004 | event = IB_CM_LAP_RECEIVED; |
| 3005 | break; |
| 3006 | case CM_APR_ATTR_ID: |
| 3007 | event = IB_CM_APR_RECEIVED; |
| 3008 | break; |
| 3009 | default: |
| 3010 | ib_free_recv_mad(mad_recv_wc); |
| 3011 | return; |
| 3012 | } |
| 3013 | |
| 3014 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
| 3015 | GFP_KERNEL); |
| 3016 | if (!work) { |
| 3017 | ib_free_recv_mad(mad_recv_wc); |
| 3018 | return; |
| 3019 | } |
| 3020 | |
| 3021 | INIT_WORK(&work->work, cm_work_handler, work); |
| 3022 | work->cm_event.event = event; |
| 3023 | work->mad_recv_wc = mad_recv_wc; |
| 3024 | work->port = (struct cm_port *)mad_agent->context; |
| 3025 | queue_work(cm.wq, &work->work); |
| 3026 | } |
| 3027 | |
| 3028 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, |
| 3029 | struct ib_qp_attr *qp_attr, |
| 3030 | int *qp_attr_mask) |
| 3031 | { |
| 3032 | unsigned long flags; |
| 3033 | int ret; |
| 3034 | |
| 3035 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3036 | switch (cm_id_priv->id.state) { |
| 3037 | case IB_CM_REQ_SENT: |
| 3038 | case IB_CM_MRA_REQ_RCVD: |
| 3039 | case IB_CM_REQ_RCVD: |
| 3040 | case IB_CM_MRA_REQ_SENT: |
| 3041 | case IB_CM_REP_RCVD: |
| 3042 | case IB_CM_MRA_REP_SENT: |
| 3043 | case IB_CM_REP_SENT: |
| 3044 | case IB_CM_MRA_REP_RCVD: |
| 3045 | case IB_CM_ESTABLISHED: |
| 3046 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | |
| 3047 | IB_QP_PKEY_INDEX | IB_QP_PORT; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3048 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
| 3049 | IB_ACCESS_REMOTE_WRITE; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3050 | if (cm_id_priv->responder_resources) |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3051 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3052 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
| 3053 | qp_attr->port_num = cm_id_priv->av.port->port_num; |
| 3054 | ret = 0; |
| 3055 | break; |
| 3056 | default: |
| 3057 | ret = -EINVAL; |
| 3058 | break; |
| 3059 | } |
| 3060 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3061 | return ret; |
| 3062 | } |
| 3063 | |
| 3064 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, |
| 3065 | struct ib_qp_attr *qp_attr, |
| 3066 | int *qp_attr_mask) |
| 3067 | { |
| 3068 | unsigned long flags; |
| 3069 | int ret; |
| 3070 | |
| 3071 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3072 | switch (cm_id_priv->id.state) { |
| 3073 | case IB_CM_REQ_RCVD: |
| 3074 | case IB_CM_MRA_REQ_SENT: |
| 3075 | case IB_CM_REP_RCVD: |
| 3076 | case IB_CM_MRA_REP_SENT: |
| 3077 | case IB_CM_REP_SENT: |
| 3078 | case IB_CM_MRA_REP_RCVD: |
| 3079 | case IB_CM_ESTABLISHED: |
| 3080 | *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] | 3081 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3082 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
| 3083 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
| 3084 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); |
| 3085 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3086 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3087 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
| 3088 | IB_QP_MIN_RNR_TIMER; |
| 3089 | qp_attr->max_dest_rd_atomic = |
| 3090 | cm_id_priv->responder_resources; |
| 3091 | qp_attr->min_rnr_timer = 0; |
| 3092 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3093 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3094 | *qp_attr_mask |= IB_QP_ALT_PATH; |
| 3095 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
| 3096 | } |
| 3097 | ret = 0; |
| 3098 | break; |
| 3099 | default: |
| 3100 | ret = -EINVAL; |
| 3101 | break; |
| 3102 | } |
| 3103 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3104 | return ret; |
| 3105 | } |
| 3106 | |
| 3107 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, |
| 3108 | struct ib_qp_attr *qp_attr, |
| 3109 | int *qp_attr_mask) |
| 3110 | { |
| 3111 | unsigned long flags; |
| 3112 | int ret; |
| 3113 | |
| 3114 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3115 | switch (cm_id_priv->id.state) { |
| 3116 | case IB_CM_REP_RCVD: |
| 3117 | case IB_CM_MRA_REP_SENT: |
| 3118 | case IB_CM_REP_SENT: |
| 3119 | case IB_CM_MRA_REP_RCVD: |
| 3120 | case IB_CM_ESTABLISHED: |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3121 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3122 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3123 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3124 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | |
| 3125 | IB_QP_RNR_RETRY | |
| 3126 | IB_QP_MAX_QP_RD_ATOMIC; |
| 3127 | qp_attr->timeout = cm_id_priv->local_ack_timeout; |
| 3128 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
| 3129 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; |
| 3130 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
| 3131 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3132 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3133 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; |
| 3134 | qp_attr->path_mig_state = IB_MIG_REARM; |
| 3135 | } |
| 3136 | ret = 0; |
| 3137 | break; |
| 3138 | default: |
| 3139 | ret = -EINVAL; |
| 3140 | break; |
| 3141 | } |
| 3142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3143 | return ret; |
| 3144 | } |
| 3145 | |
| 3146 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, |
| 3147 | struct ib_qp_attr *qp_attr, |
| 3148 | int *qp_attr_mask) |
| 3149 | { |
| 3150 | struct cm_id_private *cm_id_priv; |
| 3151 | int ret; |
| 3152 | |
| 3153 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3154 | switch (qp_attr->qp_state) { |
| 3155 | case IB_QPS_INIT: |
| 3156 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3157 | break; |
| 3158 | case IB_QPS_RTR: |
| 3159 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3160 | break; |
| 3161 | case IB_QPS_RTS: |
| 3162 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3163 | break; |
| 3164 | default: |
| 3165 | ret = -EINVAL; |
| 3166 | break; |
| 3167 | } |
| 3168 | return ret; |
| 3169 | } |
| 3170 | EXPORT_SYMBOL(ib_cm_init_qp_attr); |
| 3171 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3172 | static void cm_add_one(struct ib_device *device) |
| 3173 | { |
| 3174 | struct cm_device *cm_dev; |
| 3175 | struct cm_port *port; |
| 3176 | struct ib_mad_reg_req reg_req = { |
| 3177 | .mgmt_class = IB_MGMT_CLASS_CM, |
| 3178 | .mgmt_class_version = IB_CM_CLASS_VERSION |
| 3179 | }; |
| 3180 | struct ib_port_modify port_modify = { |
| 3181 | .set_port_cap_mask = IB_PORT_CM_SUP |
| 3182 | }; |
| 3183 | unsigned long flags; |
| 3184 | int ret; |
| 3185 | u8 i; |
| 3186 | |
| 3187 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
| 3188 | device->phys_port_cnt, GFP_KERNEL); |
| 3189 | if (!cm_dev) |
| 3190 | return; |
| 3191 | |
| 3192 | cm_dev->device = device; |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3193 | cm_dev->ca_guid = device->node_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3194 | |
| 3195 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
| 3196 | for (i = 1; i <= device->phys_port_cnt; i++) { |
| 3197 | port = &cm_dev->port[i-1]; |
| 3198 | port->cm_dev = cm_dev; |
| 3199 | port->port_num = i; |
| 3200 | port->mad_agent = ib_register_mad_agent(device, i, |
| 3201 | IB_QPT_GSI, |
| 3202 | ®_req, |
| 3203 | 0, |
| 3204 | cm_send_handler, |
| 3205 | cm_recv_handler, |
| 3206 | port); |
| 3207 | if (IS_ERR(port->mad_agent)) |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3208 | goto error1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3209 | |
| 3210 | ret = ib_modify_port(device, i, 0, &port_modify); |
| 3211 | if (ret) |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3212 | goto error2; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3213 | } |
| 3214 | ib_set_client_data(device, &cm_client, cm_dev); |
| 3215 | |
| 3216 | write_lock_irqsave(&cm.device_lock, flags); |
| 3217 | list_add_tail(&cm_dev->list, &cm.device_list); |
| 3218 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3219 | return; |
| 3220 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3221 | error2: |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3222 | ib_unregister_mad_agent(port->mad_agent); |
| 3223 | error1: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3224 | port_modify.set_port_cap_mask = 0; |
| 3225 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; |
| 3226 | while (--i) { |
| 3227 | port = &cm_dev->port[i-1]; |
| 3228 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3229 | ib_unregister_mad_agent(port->mad_agent); |
| 3230 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3231 | kfree(cm_dev); |
| 3232 | } |
| 3233 | |
| 3234 | static void cm_remove_one(struct ib_device *device) |
| 3235 | { |
| 3236 | struct cm_device *cm_dev; |
| 3237 | struct cm_port *port; |
| 3238 | struct ib_port_modify port_modify = { |
| 3239 | .clr_port_cap_mask = IB_PORT_CM_SUP |
| 3240 | }; |
| 3241 | unsigned long flags; |
| 3242 | int i; |
| 3243 | |
| 3244 | cm_dev = ib_get_client_data(device, &cm_client); |
| 3245 | if (!cm_dev) |
| 3246 | return; |
| 3247 | |
| 3248 | write_lock_irqsave(&cm.device_lock, flags); |
| 3249 | list_del(&cm_dev->list); |
| 3250 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3251 | |
| 3252 | for (i = 1; i <= device->phys_port_cnt; i++) { |
| 3253 | port = &cm_dev->port[i-1]; |
| 3254 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3255 | ib_unregister_mad_agent(port->mad_agent); |
| 3256 | } |
| 3257 | kfree(cm_dev); |
| 3258 | } |
| 3259 | |
| 3260 | static int __init ib_cm_init(void) |
| 3261 | { |
| 3262 | int ret; |
| 3263 | |
| 3264 | memset(&cm, 0, sizeof cm); |
| 3265 | INIT_LIST_HEAD(&cm.device_list); |
| 3266 | rwlock_init(&cm.device_lock); |
| 3267 | spin_lock_init(&cm.lock); |
| 3268 | cm.listen_service_table = RB_ROOT; |
| 3269 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
| 3270 | cm.remote_id_table = RB_ROOT; |
| 3271 | cm.remote_qp_table = RB_ROOT; |
| 3272 | cm.remote_sidr_table = RB_ROOT; |
| 3273 | idr_init(&cm.local_id_table); |
| 3274 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
| 3275 | |
| 3276 | cm.wq = create_workqueue("ib_cm"); |
| 3277 | if (!cm.wq) |
| 3278 | return -ENOMEM; |
| 3279 | |
| 3280 | ret = ib_register_client(&cm_client); |
| 3281 | if (ret) |
| 3282 | goto error; |
| 3283 | |
| 3284 | return 0; |
| 3285 | error: |
| 3286 | destroy_workqueue(cm.wq); |
| 3287 | return ret; |
| 3288 | } |
| 3289 | |
| 3290 | static void __exit ib_cm_cleanup(void) |
| 3291 | { |
| 3292 | flush_workqueue(cm.wq); |
| 3293 | destroy_workqueue(cm.wq); |
| 3294 | ib_unregister_client(&cm_client); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 3295 | idr_destroy(&cm.local_id_table); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3296 | } |
| 3297 | |
| 3298 | module_init(ib_cm_init); |
| 3299 | module_exit(ib_cm_cleanup); |
| 3300 | |