Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1 | /* |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2 | * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
| 4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. |
| 5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| 6 | * |
| 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
| 16 | * |
| 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
| 20 | * |
| 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
| 34 | * |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 35 | * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 36 | */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 37 | |
| 38 | #include <linux/completion.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 39 | #include <linux/dma-mapping.h> |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 40 | #include <linux/device.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 41 | #include <linux/err.h> |
| 42 | #include <linux/idr.h> |
| 43 | #include <linux/interrupt.h> |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 44 | #include <linux/random.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 45 | #include <linux/rbtree.h> |
| 46 | #include <linux/spinlock.h> |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 47 | #include <linux/sysfs.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 48 | #include <linux/workqueue.h> |
| 49 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 50 | #include <rdma/ib_cache.h> |
| 51 | #include <rdma/ib_cm.h> |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 52 | #include "cm_msgs.h" |
| 53 | |
| 54 | MODULE_AUTHOR("Sean Hefty"); |
| 55 | MODULE_DESCRIPTION("InfiniBand CM"); |
| 56 | MODULE_LICENSE("Dual BSD/GPL"); |
| 57 | |
| 58 | static void cm_add_one(struct ib_device *device); |
| 59 | static void cm_remove_one(struct ib_device *device); |
| 60 | |
| 61 | static struct ib_client cm_client = { |
| 62 | .name = "cm", |
| 63 | .add = cm_add_one, |
| 64 | .remove = cm_remove_one |
| 65 | }; |
| 66 | |
| 67 | static struct ib_cm { |
| 68 | spinlock_t lock; |
| 69 | struct list_head device_list; |
| 70 | rwlock_t device_lock; |
| 71 | struct rb_root listen_service_table; |
| 72 | u64 listen_service_id; |
| 73 | /* struct rb_root peer_service_table; todo: fix peer to peer */ |
| 74 | struct rb_root remote_qp_table; |
| 75 | struct rb_root remote_id_table; |
| 76 | struct rb_root remote_sidr_table; |
| 77 | struct idr local_id_table; |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 78 | __be32 random_id_operand; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 79 | struct list_head timewait_list; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 80 | struct workqueue_struct *wq; |
| 81 | } cm; |
| 82 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 83 | /* Counter indexes ordered by attribute ID */ |
| 84 | enum { |
| 85 | CM_REQ_COUNTER, |
| 86 | CM_MRA_COUNTER, |
| 87 | CM_REJ_COUNTER, |
| 88 | CM_REP_COUNTER, |
| 89 | CM_RTU_COUNTER, |
| 90 | CM_DREQ_COUNTER, |
| 91 | CM_DREP_COUNTER, |
| 92 | CM_SIDR_REQ_COUNTER, |
| 93 | CM_SIDR_REP_COUNTER, |
| 94 | CM_LAP_COUNTER, |
| 95 | CM_APR_COUNTER, |
| 96 | CM_ATTR_COUNT, |
| 97 | CM_ATTR_ID_OFFSET = 0x0010, |
| 98 | }; |
| 99 | |
| 100 | enum { |
| 101 | CM_XMIT, |
| 102 | CM_XMIT_RETRIES, |
| 103 | CM_RECV, |
| 104 | CM_RECV_DUPLICATES, |
| 105 | CM_COUNTER_GROUPS |
| 106 | }; |
| 107 | |
| 108 | static char const counter_group_names[CM_COUNTER_GROUPS] |
| 109 | [sizeof("cm_rx_duplicates")] = { |
| 110 | "cm_tx_msgs", "cm_tx_retries", |
| 111 | "cm_rx_msgs", "cm_rx_duplicates" |
| 112 | }; |
| 113 | |
| 114 | struct cm_counter_group { |
| 115 | struct kobject obj; |
| 116 | atomic_long_t counter[CM_ATTR_COUNT]; |
| 117 | }; |
| 118 | |
| 119 | struct cm_counter_attribute { |
| 120 | struct attribute attr; |
| 121 | int index; |
| 122 | }; |
| 123 | |
| 124 | #define CM_COUNTER_ATTR(_name, _index) \ |
| 125 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ |
| 126 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ |
| 127 | .index = _index \ |
| 128 | } |
| 129 | |
| 130 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); |
| 131 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); |
| 132 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); |
| 133 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); |
| 134 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); |
| 135 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); |
| 136 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); |
| 137 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); |
| 138 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); |
| 139 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); |
| 140 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); |
| 141 | |
| 142 | static struct attribute *cm_counter_default_attrs[] = { |
| 143 | &cm_req_counter_attr.attr, |
| 144 | &cm_mra_counter_attr.attr, |
| 145 | &cm_rej_counter_attr.attr, |
| 146 | &cm_rep_counter_attr.attr, |
| 147 | &cm_rtu_counter_attr.attr, |
| 148 | &cm_dreq_counter_attr.attr, |
| 149 | &cm_drep_counter_attr.attr, |
| 150 | &cm_sidr_req_counter_attr.attr, |
| 151 | &cm_sidr_rep_counter_attr.attr, |
| 152 | &cm_lap_counter_attr.attr, |
| 153 | &cm_apr_counter_attr.attr, |
| 154 | NULL |
| 155 | }; |
| 156 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 157 | struct cm_port { |
| 158 | struct cm_device *cm_dev; |
| 159 | struct ib_mad_agent *mad_agent; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 160 | struct kobject port_obj; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 161 | u8 port_num; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 162 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 163 | }; |
| 164 | |
| 165 | struct cm_device { |
| 166 | struct list_head list; |
| 167 | struct ib_device *device; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 168 | struct kobject dev_obj; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 169 | u8 ack_delay; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 170 | struct cm_port *port[0]; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 171 | }; |
| 172 | |
| 173 | struct cm_av { |
| 174 | struct cm_port *port; |
| 175 | union ib_gid dgid; |
| 176 | struct ib_ah_attr ah_attr; |
| 177 | u16 pkey_index; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 178 | u8 timeout; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 179 | }; |
| 180 | |
| 181 | struct cm_work { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 182 | struct delayed_work work; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 183 | struct list_head list; |
| 184 | struct cm_port *port; |
| 185 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 186 | __be32 local_id; /* Established / timewait */ |
| 187 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 188 | struct ib_cm_event cm_event; |
| 189 | struct ib_sa_path_rec path[0]; |
| 190 | }; |
| 191 | |
| 192 | struct cm_timewait_info { |
| 193 | struct cm_work work; /* Must be first. */ |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 194 | struct list_head list; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 195 | struct rb_node remote_qp_node; |
| 196 | struct rb_node remote_id_node; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 197 | __be64 remote_ca_guid; |
| 198 | __be32 remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 199 | u8 inserted_remote_qp; |
| 200 | u8 inserted_remote_id; |
| 201 | }; |
| 202 | |
| 203 | struct cm_id_private { |
| 204 | struct ib_cm_id id; |
| 205 | |
| 206 | struct rb_node service_node; |
| 207 | struct rb_node sidr_id_node; |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 208 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 209 | struct completion comp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 210 | atomic_t refcount; |
| 211 | |
| 212 | struct ib_mad_send_buf *msg; |
| 213 | struct cm_timewait_info *timewait_info; |
| 214 | /* todo: use alternate port on send failure */ |
| 215 | struct cm_av av; |
| 216 | struct cm_av alt_av; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 217 | struct ib_cm_compare_data *compare_data; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 218 | |
| 219 | void *private_data; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 220 | __be64 tid; |
| 221 | __be32 local_qpn; |
| 222 | __be32 remote_qpn; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 223 | enum ib_qp_type qp_type; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 224 | __be32 sq_psn; |
| 225 | __be32 rq_psn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 226 | int timeout_ms; |
| 227 | enum ib_mtu path_mtu; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 228 | __be16 pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 229 | u8 private_data_len; |
| 230 | u8 max_cm_retries; |
| 231 | u8 peer_to_peer; |
| 232 | u8 responder_resources; |
| 233 | u8 initiator_depth; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 234 | u8 retry_count; |
| 235 | u8 rnr_retry_count; |
| 236 | u8 service_timeout; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 237 | u8 target_ack_delay; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 238 | |
| 239 | struct list_head work_list; |
| 240 | atomic_t work_count; |
| 241 | }; |
| 242 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 243 | static void cm_work_handler(struct work_struct *work); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 244 | |
| 245 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) |
| 246 | { |
| 247 | if (atomic_dec_and_test(&cm_id_priv->refcount)) |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 248 | complete(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, |
| 252 | struct ib_mad_send_buf **msg) |
| 253 | { |
| 254 | struct ib_mad_agent *mad_agent; |
| 255 | struct ib_mad_send_buf *m; |
| 256 | struct ib_ah *ah; |
| 257 | |
| 258 | mad_agent = cm_id_priv->av.port->mad_agent; |
| 259 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); |
| 260 | if (IS_ERR(ah)) |
| 261 | return PTR_ERR(ah); |
| 262 | |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 263 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 264 | cm_id_priv->av.pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 265 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 266 | GFP_ATOMIC); |
| 267 | if (IS_ERR(m)) { |
| 268 | ib_destroy_ah(ah); |
| 269 | return PTR_ERR(m); |
| 270 | } |
| 271 | |
| 272 | /* Timeout set by caller if response is expected. */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 273 | m->ah = ah; |
| 274 | m->retries = cm_id_priv->max_cm_retries; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 275 | |
| 276 | atomic_inc(&cm_id_priv->refcount); |
| 277 | m->context[0] = cm_id_priv; |
| 278 | *msg = m; |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static int cm_alloc_response_msg(struct cm_port *port, |
| 283 | struct ib_mad_recv_wc *mad_recv_wc, |
| 284 | struct ib_mad_send_buf **msg) |
| 285 | { |
| 286 | struct ib_mad_send_buf *m; |
| 287 | struct ib_ah *ah; |
| 288 | |
| 289 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, |
| 290 | mad_recv_wc->recv_buf.grh, port->port_num); |
| 291 | if (IS_ERR(ah)) |
| 292 | return PTR_ERR(ah); |
| 293 | |
| 294 | 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] | 295 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 296 | GFP_ATOMIC); |
| 297 | if (IS_ERR(m)) { |
| 298 | ib_destroy_ah(ah); |
| 299 | return PTR_ERR(m); |
| 300 | } |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 301 | m->ah = ah; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 302 | *msg = m; |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | static void cm_free_msg(struct ib_mad_send_buf *msg) |
| 307 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 308 | ib_destroy_ah(msg->ah); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 309 | if (msg->context[0]) |
| 310 | cm_deref_id(msg->context[0]); |
| 311 | ib_free_send_mad(msg); |
| 312 | } |
| 313 | |
| 314 | static void * cm_copy_private_data(const void *private_data, |
| 315 | u8 private_data_len) |
| 316 | { |
| 317 | void *data; |
| 318 | |
| 319 | if (!private_data || !private_data_len) |
| 320 | return NULL; |
| 321 | |
Eric Sesterhenn | bed8bdf | 2006-10-23 22:17:21 +0200 | [diff] [blame] | 322 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 323 | if (!data) |
| 324 | return ERR_PTR(-ENOMEM); |
| 325 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 326 | return data; |
| 327 | } |
| 328 | |
| 329 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, |
| 330 | void *private_data, u8 private_data_len) |
| 331 | { |
| 332 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) |
| 333 | kfree(cm_id_priv->private_data); |
| 334 | |
| 335 | cm_id_priv->private_data = private_data; |
| 336 | cm_id_priv->private_data_len = private_data_len; |
| 337 | } |
| 338 | |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 339 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
| 340 | struct ib_grh *grh, struct cm_av *av) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 341 | { |
| 342 | av->port = port; |
| 343 | av->pkey_index = wc->pkey_index; |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 344 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
| 345 | grh, &av->ah_attr); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) |
| 349 | { |
| 350 | struct cm_device *cm_dev; |
| 351 | struct cm_port *port = NULL; |
| 352 | unsigned long flags; |
| 353 | int ret; |
| 354 | u8 p; |
| 355 | |
| 356 | read_lock_irqsave(&cm.device_lock, flags); |
| 357 | list_for_each_entry(cm_dev, &cm.device_list, list) { |
| 358 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, |
| 359 | &p, NULL)) { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 360 | port = cm_dev->port[p-1]; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 361 | break; |
| 362 | } |
| 363 | } |
| 364 | read_unlock_irqrestore(&cm.device_lock, flags); |
| 365 | |
| 366 | if (!port) |
| 367 | return -EINVAL; |
| 368 | |
| 369 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, |
| 370 | be16_to_cpu(path->pkey), &av->pkey_index); |
| 371 | if (ret) |
| 372 | return ret; |
| 373 | |
| 374 | av->port = port; |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 375 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
| 376 | &av->ah_attr); |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 377 | av->timeout = path->packet_life_time + 1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) |
| 382 | { |
| 383 | unsigned long flags; |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 384 | int ret, id; |
Sean Hefty | de1bb1a | 2005-11-30 10:01:13 -0800 | [diff] [blame] | 385 | static int next_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 386 | |
| 387 | do { |
| 388 | spin_lock_irqsave(&cm.lock, flags); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 389 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
Michael S. Tsirkin | 9f81036c | 2007-05-21 19:06:54 +0300 | [diff] [blame] | 390 | next_id, &id); |
| 391 | if (!ret) |
| 392 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 393 | spin_unlock_irqrestore(&cm.lock, flags); |
| 394 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 395 | |
| 396 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 397 | return ret; |
| 398 | } |
| 399 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 400 | static void cm_free_id(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 401 | { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 402 | spin_lock_irq(&cm.lock); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 403 | idr_remove(&cm.local_id_table, |
| 404 | (__force int) (local_id ^ cm.random_id_operand)); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 405 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 408 | 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] | 409 | { |
| 410 | struct cm_id_private *cm_id_priv; |
| 411 | |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 412 | cm_id_priv = idr_find(&cm.local_id_table, |
| 413 | (__force int) (local_id ^ cm.random_id_operand)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 414 | if (cm_id_priv) { |
| 415 | if (cm_id_priv->id.remote_id == remote_id) |
| 416 | atomic_inc(&cm_id_priv->refcount); |
| 417 | else |
| 418 | cm_id_priv = NULL; |
| 419 | } |
| 420 | |
| 421 | return cm_id_priv; |
| 422 | } |
| 423 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 424 | 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] | 425 | { |
| 426 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 427 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 428 | spin_lock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 429 | cm_id_priv = cm_get_id(local_id, remote_id); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 430 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 431 | |
| 432 | return cm_id_priv; |
| 433 | } |
| 434 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 435 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
| 436 | { |
| 437 | int i; |
| 438 | |
| 439 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) |
| 440 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & |
| 441 | ((unsigned long *) mask)[i]; |
| 442 | } |
| 443 | |
| 444 | static int cm_compare_data(struct ib_cm_compare_data *src_data, |
| 445 | struct ib_cm_compare_data *dst_data) |
| 446 | { |
| 447 | u8 src[IB_CM_COMPARE_SIZE]; |
| 448 | u8 dst[IB_CM_COMPARE_SIZE]; |
| 449 | |
| 450 | if (!src_data || !dst_data) |
| 451 | return 0; |
| 452 | |
| 453 | cm_mask_copy(src, src_data->data, dst_data->mask); |
| 454 | cm_mask_copy(dst, dst_data->data, src_data->mask); |
| 455 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); |
| 456 | } |
| 457 | |
| 458 | static int cm_compare_private_data(u8 *private_data, |
| 459 | struct ib_cm_compare_data *dst_data) |
| 460 | { |
| 461 | u8 src[IB_CM_COMPARE_SIZE]; |
| 462 | |
| 463 | if (!dst_data) |
| 464 | return 0; |
| 465 | |
| 466 | cm_mask_copy(src, private_data, dst_data->mask); |
| 467 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); |
| 468 | } |
| 469 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 470 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
| 471 | { |
| 472 | struct rb_node **link = &cm.listen_service_table.rb_node; |
| 473 | struct rb_node *parent = NULL; |
| 474 | struct cm_id_private *cur_cm_id_priv; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 475 | __be64 service_id = cm_id_priv->id.service_id; |
| 476 | __be64 service_mask = cm_id_priv->id.service_mask; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 477 | int data_cmp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 478 | |
| 479 | while (*link) { |
| 480 | parent = *link; |
| 481 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 482 | service_node); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 483 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
| 484 | cur_cm_id_priv->compare_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 485 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 486 | (service_mask & cur_cm_id_priv->id.service_id) && |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 487 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
| 488 | !data_cmp) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 489 | return cur_cm_id_priv; |
| 490 | |
| 491 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) |
| 492 | link = &(*link)->rb_left; |
| 493 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) |
| 494 | link = &(*link)->rb_right; |
| 495 | else if (service_id < cur_cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 496 | link = &(*link)->rb_left; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 497 | else if (service_id > cur_cm_id_priv->id.service_id) |
| 498 | link = &(*link)->rb_right; |
| 499 | else if (data_cmp < 0) |
| 500 | link = &(*link)->rb_left; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 501 | else |
| 502 | link = &(*link)->rb_right; |
| 503 | } |
| 504 | rb_link_node(&cm_id_priv->service_node, parent, link); |
| 505 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); |
| 506 | return NULL; |
| 507 | } |
| 508 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 509 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 510 | __be64 service_id, |
| 511 | u8 *private_data) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 512 | { |
| 513 | struct rb_node *node = cm.listen_service_table.rb_node; |
| 514 | struct cm_id_private *cm_id_priv; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 515 | int data_cmp; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 516 | |
| 517 | while (node) { |
| 518 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 519 | data_cmp = cm_compare_private_data(private_data, |
| 520 | cm_id_priv->compare_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 521 | if ((cm_id_priv->id.service_mask & service_id) == |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 522 | cm_id_priv->id.service_id && |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 523 | (cm_id_priv->id.device == device) && !data_cmp) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 524 | return cm_id_priv; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 525 | |
| 526 | if (device < cm_id_priv->id.device) |
| 527 | node = node->rb_left; |
| 528 | else if (device > cm_id_priv->id.device) |
| 529 | node = node->rb_right; |
| 530 | else if (service_id < cm_id_priv->id.service_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 531 | node = node->rb_left; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 532 | else if (service_id > cm_id_priv->id.service_id) |
| 533 | node = node->rb_right; |
| 534 | else if (data_cmp < 0) |
| 535 | node = node->rb_left; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 536 | else |
| 537 | node = node->rb_right; |
| 538 | } |
| 539 | return NULL; |
| 540 | } |
| 541 | |
| 542 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info |
| 543 | *timewait_info) |
| 544 | { |
| 545 | struct rb_node **link = &cm.remote_id_table.rb_node; |
| 546 | struct rb_node *parent = NULL; |
| 547 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 548 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 549 | __be32 remote_id = timewait_info->work.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 550 | |
| 551 | while (*link) { |
| 552 | parent = *link; |
| 553 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 554 | remote_id_node); |
| 555 | if (remote_id < cur_timewait_info->work.remote_id) |
| 556 | link = &(*link)->rb_left; |
| 557 | else if (remote_id > cur_timewait_info->work.remote_id) |
| 558 | link = &(*link)->rb_right; |
| 559 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 560 | link = &(*link)->rb_left; |
| 561 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 562 | link = &(*link)->rb_right; |
| 563 | else |
| 564 | return cur_timewait_info; |
| 565 | } |
| 566 | timewait_info->inserted_remote_id = 1; |
| 567 | rb_link_node(&timewait_info->remote_id_node, parent, link); |
| 568 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 569 | return NULL; |
| 570 | } |
| 571 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 572 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
| 573 | __be32 remote_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 574 | { |
| 575 | struct rb_node *node = cm.remote_id_table.rb_node; |
| 576 | struct cm_timewait_info *timewait_info; |
| 577 | |
| 578 | while (node) { |
| 579 | timewait_info = rb_entry(node, struct cm_timewait_info, |
| 580 | remote_id_node); |
| 581 | if (remote_id < timewait_info->work.remote_id) |
| 582 | node = node->rb_left; |
| 583 | else if (remote_id > timewait_info->work.remote_id) |
| 584 | node = node->rb_right; |
| 585 | else if (remote_ca_guid < timewait_info->remote_ca_guid) |
| 586 | node = node->rb_left; |
| 587 | else if (remote_ca_guid > timewait_info->remote_ca_guid) |
| 588 | node = node->rb_right; |
| 589 | else |
| 590 | return timewait_info; |
| 591 | } |
| 592 | return NULL; |
| 593 | } |
| 594 | |
| 595 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info |
| 596 | *timewait_info) |
| 597 | { |
| 598 | struct rb_node **link = &cm.remote_qp_table.rb_node; |
| 599 | struct rb_node *parent = NULL; |
| 600 | struct cm_timewait_info *cur_timewait_info; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 601 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| 602 | __be32 remote_qpn = timewait_info->remote_qpn; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 603 | |
| 604 | while (*link) { |
| 605 | parent = *link; |
| 606 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| 607 | remote_qp_node); |
| 608 | if (remote_qpn < cur_timewait_info->remote_qpn) |
| 609 | link = &(*link)->rb_left; |
| 610 | else if (remote_qpn > cur_timewait_info->remote_qpn) |
| 611 | link = &(*link)->rb_right; |
| 612 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| 613 | link = &(*link)->rb_left; |
| 614 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| 615 | link = &(*link)->rb_right; |
| 616 | else |
| 617 | return cur_timewait_info; |
| 618 | } |
| 619 | timewait_info->inserted_remote_qp = 1; |
| 620 | rb_link_node(&timewait_info->remote_qp_node, parent, link); |
| 621 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 622 | return NULL; |
| 623 | } |
| 624 | |
| 625 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private |
| 626 | *cm_id_priv) |
| 627 | { |
| 628 | struct rb_node **link = &cm.remote_sidr_table.rb_node; |
| 629 | struct rb_node *parent = NULL; |
| 630 | struct cm_id_private *cur_cm_id_priv; |
| 631 | union ib_gid *port_gid = &cm_id_priv->av.dgid; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 632 | __be32 remote_id = cm_id_priv->id.remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 633 | |
| 634 | while (*link) { |
| 635 | parent = *link; |
| 636 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| 637 | sidr_id_node); |
| 638 | if (remote_id < cur_cm_id_priv->id.remote_id) |
| 639 | link = &(*link)->rb_left; |
| 640 | else if (remote_id > cur_cm_id_priv->id.remote_id) |
| 641 | link = &(*link)->rb_right; |
| 642 | else { |
| 643 | int cmp; |
| 644 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, |
| 645 | sizeof *port_gid); |
| 646 | if (cmp < 0) |
| 647 | link = &(*link)->rb_left; |
| 648 | else if (cmp > 0) |
| 649 | link = &(*link)->rb_right; |
| 650 | else |
| 651 | return cur_cm_id_priv; |
| 652 | } |
| 653 | } |
| 654 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); |
| 655 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 656 | return NULL; |
| 657 | } |
| 658 | |
| 659 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, |
| 660 | enum ib_cm_sidr_status status) |
| 661 | { |
| 662 | struct ib_cm_sidr_rep_param param; |
| 663 | |
| 664 | memset(¶m, 0, sizeof param); |
| 665 | param.status = status; |
| 666 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); |
| 667 | } |
| 668 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 669 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
| 670 | ib_cm_handler cm_handler, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 671 | void *context) |
| 672 | { |
| 673 | struct cm_id_private *cm_id_priv; |
| 674 | int ret; |
| 675 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 676 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 677 | if (!cm_id_priv) |
| 678 | return ERR_PTR(-ENOMEM); |
| 679 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 680 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 681 | cm_id_priv->id.device = device; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 682 | cm_id_priv->id.cm_handler = cm_handler; |
| 683 | cm_id_priv->id.context = context; |
John Kingman | 354ba39 | 2005-09-09 18:23:32 -0700 | [diff] [blame] | 684 | cm_id_priv->id.remote_cm_qpn = 1; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 685 | ret = cm_alloc_id(cm_id_priv); |
| 686 | if (ret) |
| 687 | goto error; |
| 688 | |
| 689 | spin_lock_init(&cm_id_priv->lock); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 690 | init_completion(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 691 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
| 692 | atomic_set(&cm_id_priv->work_count, -1); |
| 693 | atomic_set(&cm_id_priv->refcount, 1); |
| 694 | return &cm_id_priv->id; |
| 695 | |
| 696 | error: |
| 697 | kfree(cm_id_priv); |
| 698 | return ERR_PTR(-ENOMEM); |
| 699 | } |
| 700 | EXPORT_SYMBOL(ib_create_cm_id); |
| 701 | |
| 702 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) |
| 703 | { |
| 704 | struct cm_work *work; |
| 705 | |
| 706 | if (list_empty(&cm_id_priv->work_list)) |
| 707 | return NULL; |
| 708 | |
| 709 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); |
| 710 | list_del(&work->list); |
| 711 | return work; |
| 712 | } |
| 713 | |
| 714 | static void cm_free_work(struct cm_work *work) |
| 715 | { |
| 716 | if (work->mad_recv_wc) |
| 717 | ib_free_recv_mad(work->mad_recv_wc); |
| 718 | kfree(work); |
| 719 | } |
| 720 | |
| 721 | static inline int cm_convert_to_ms(int iba_time) |
| 722 | { |
| 723 | /* approximate conversion to ms from 4.096us x 2^iba_time */ |
| 724 | return 1 << max(iba_time - 8, 0); |
| 725 | } |
| 726 | |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 727 | /* |
| 728 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time |
| 729 | * Because of how ack_timeout is stored, adding one doubles the timeout. |
| 730 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and |
| 731 | * increment it (round up) only if the other is within 50%. |
| 732 | */ |
| 733 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) |
| 734 | { |
| 735 | int ack_timeout = packet_life_time + 1; |
| 736 | |
| 737 | if (ack_timeout >= ca_ack_delay) |
| 738 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); |
| 739 | else |
| 740 | ack_timeout = ca_ack_delay + |
| 741 | (ack_timeout >= (ca_ack_delay - 1)); |
| 742 | |
| 743 | return min(31, ack_timeout); |
| 744 | } |
| 745 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 746 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
| 747 | { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 748 | if (timewait_info->inserted_remote_id) { |
| 749 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); |
| 750 | timewait_info->inserted_remote_id = 0; |
| 751 | } |
| 752 | |
| 753 | if (timewait_info->inserted_remote_qp) { |
| 754 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| 755 | timewait_info->inserted_remote_qp = 0; |
| 756 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 759 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 760 | { |
| 761 | struct cm_timewait_info *timewait_info; |
| 762 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 763 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 764 | if (!timewait_info) |
| 765 | return ERR_PTR(-ENOMEM); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 766 | |
| 767 | timewait_info->work.local_id = local_id; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 768 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 769 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
| 770 | return timewait_info; |
| 771 | } |
| 772 | |
| 773 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) |
| 774 | { |
| 775 | int wait_time; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 776 | unsigned long flags; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 777 | |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 778 | spin_lock_irqsave(&cm.lock, flags); |
Michael S. Tsirkin | a70d059 | 2006-08-28 16:32:50 +0300 | [diff] [blame] | 779 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 780 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
| 781 | spin_unlock_irqrestore(&cm.lock, flags); |
Michael S. Tsirkin | a70d059 | 2006-08-28 16:32:50 +0300 | [diff] [blame] | 782 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 783 | /* |
| 784 | * The cm_id could be destroyed by the user before we exit timewait. |
| 785 | * To protect against this, we search for the cm_id after exiting |
| 786 | * timewait before notifying the user that we've exited timewait. |
| 787 | */ |
| 788 | cm_id_priv->id.state = IB_CM_TIMEWAIT; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 789 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 790 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
| 791 | msecs_to_jiffies(wait_time)); |
| 792 | cm_id_priv->timewait_info = NULL; |
| 793 | } |
| 794 | |
| 795 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) |
| 796 | { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 797 | unsigned long flags; |
| 798 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 799 | cm_id_priv->id.state = IB_CM_IDLE; |
| 800 | if (cm_id_priv->timewait_info) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 801 | spin_lock_irqsave(&cm.lock, flags); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 802 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 803 | spin_unlock_irqrestore(&cm.lock, flags); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 804 | kfree(cm_id_priv->timewait_info); |
| 805 | cm_id_priv->timewait_info = NULL; |
| 806 | } |
| 807 | } |
| 808 | |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 809 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 810 | { |
| 811 | struct cm_id_private *cm_id_priv; |
| 812 | struct cm_work *work; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 813 | |
| 814 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 815 | retest: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 816 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 817 | switch (cm_id->state) { |
| 818 | case IB_CM_LISTEN: |
| 819 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 820 | spin_unlock_irq(&cm_id_priv->lock); |
| 821 | spin_lock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 822 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 823 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 824 | break; |
| 825 | case IB_CM_SIDR_REQ_SENT: |
| 826 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 827 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 828 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 829 | break; |
| 830 | case IB_CM_SIDR_REQ_RCVD: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 831 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 832 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
| 833 | break; |
| 834 | case IB_CM_REQ_SENT: |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 835 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 836 | spin_unlock_irq(&cm_id_priv->lock); |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 837 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 838 | &cm_id_priv->id.device->node_guid, |
| 839 | sizeof cm_id_priv->id.device->node_guid, |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 840 | NULL, 0); |
| 841 | break; |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 842 | case IB_CM_REQ_RCVD: |
| 843 | if (err == -ENOMEM) { |
| 844 | /* Do not reject to allow future retries. */ |
| 845 | cm_reset_to_idle(cm_id_priv); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 846 | spin_unlock_irq(&cm_id_priv->lock); |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 847 | } else { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 848 | spin_unlock_irq(&cm_id_priv->lock); |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 849 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 850 | NULL, 0, NULL, 0); |
| 851 | } |
| 852 | break; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 853 | case IB_CM_MRA_REQ_RCVD: |
| 854 | case IB_CM_REP_SENT: |
| 855 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 856 | 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] | 857 | /* Fall through */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 858 | case IB_CM_MRA_REQ_SENT: |
| 859 | case IB_CM_REP_RCVD: |
| 860 | case IB_CM_MRA_REP_SENT: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 861 | spin_unlock_irq(&cm_id_priv->lock); |
Sean Hefty | 227eca8 | 2005-11-30 10:00:25 -0800 | [diff] [blame] | 862 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 863 | NULL, 0, NULL, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 864 | break; |
| 865 | case IB_CM_ESTABLISHED: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 866 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 867 | ib_send_cm_dreq(cm_id, NULL, 0); |
| 868 | goto retest; |
| 869 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 870 | 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] | 871 | cm_enter_timewait(cm_id_priv); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 872 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 873 | break; |
| 874 | case IB_CM_DREQ_RCVD: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 875 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 876 | ib_send_cm_drep(cm_id, NULL, 0); |
| 877 | break; |
| 878 | default: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 879 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 880 | break; |
| 881 | } |
| 882 | |
| 883 | cm_free_id(cm_id->local_id); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 884 | cm_deref_id(cm_id_priv); |
| 885 | wait_for_completion(&cm_id_priv->comp); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 886 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
| 887 | cm_free_work(work); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 888 | kfree(cm_id_priv->compare_data); |
| 889 | kfree(cm_id_priv->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 890 | kfree(cm_id_priv); |
| 891 | } |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 892 | |
| 893 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) |
| 894 | { |
| 895 | cm_destroy_id(cm_id, 0); |
| 896 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 897 | EXPORT_SYMBOL(ib_destroy_cm_id); |
| 898 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 899 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
| 900 | struct ib_cm_compare_data *compare_data) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 901 | { |
| 902 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 903 | unsigned long flags; |
| 904 | int ret = 0; |
| 905 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 906 | service_mask = service_mask ? service_mask : |
| 907 | __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 908 | service_id &= service_mask; |
| 909 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && |
| 910 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) |
| 911 | return -EINVAL; |
| 912 | |
| 913 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 914 | if (cm_id->state != IB_CM_IDLE) |
| 915 | return -EINVAL; |
| 916 | |
| 917 | if (compare_data) { |
| 918 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, |
| 919 | GFP_KERNEL); |
| 920 | if (!cm_id_priv->compare_data) |
| 921 | return -ENOMEM; |
| 922 | cm_mask_copy(cm_id_priv->compare_data->data, |
| 923 | compare_data->data, compare_data->mask); |
| 924 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, |
| 925 | IB_CM_COMPARE_SIZE); |
| 926 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 927 | |
| 928 | cm_id->state = IB_CM_LISTEN; |
| 929 | |
| 930 | spin_lock_irqsave(&cm.lock, flags); |
| 931 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 932 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
| 933 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 934 | } else { |
| 935 | cm_id->service_id = service_id; |
| 936 | cm_id->service_mask = service_mask; |
| 937 | } |
| 938 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); |
| 939 | spin_unlock_irqrestore(&cm.lock, flags); |
| 940 | |
| 941 | if (cur_cm_id_priv) { |
| 942 | cm_id->state = IB_CM_IDLE; |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 943 | kfree(cm_id_priv->compare_data); |
| 944 | cm_id_priv->compare_data = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 945 | ret = -EBUSY; |
| 946 | } |
| 947 | return ret; |
| 948 | } |
| 949 | EXPORT_SYMBOL(ib_cm_listen); |
| 950 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 951 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
| 952 | enum cm_msg_sequence msg_seq) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 953 | { |
| 954 | u64 hi_tid, low_tid; |
| 955 | |
| 956 | 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] | 957 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
| 958 | (msg_seq << 30)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 959 | return cpu_to_be64(hi_tid | low_tid); |
| 960 | } |
| 961 | |
| 962 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 963 | __be16 attr_id, __be64 tid) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 964 | { |
| 965 | hdr->base_version = IB_MGMT_BASE_VERSION; |
| 966 | hdr->mgmt_class = IB_MGMT_CLASS_CM; |
| 967 | hdr->class_version = IB_CM_CLASS_VERSION; |
| 968 | hdr->method = IB_MGMT_METHOD_SEND; |
| 969 | hdr->attr_id = attr_id; |
| 970 | hdr->tid = tid; |
| 971 | } |
| 972 | |
| 973 | static void cm_format_req(struct cm_req_msg *req_msg, |
| 974 | struct cm_id_private *cm_id_priv, |
| 975 | struct ib_cm_req_param *param) |
| 976 | { |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 977 | struct ib_sa_path_rec *pri_path = param->primary_path; |
| 978 | struct ib_sa_path_rec *alt_path = param->alternate_path; |
| 979 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 980 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
| 981 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); |
| 982 | |
| 983 | req_msg->local_comm_id = cm_id_priv->id.local_id; |
| 984 | req_msg->service_id = param->service_id; |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 985 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 986 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
| 987 | cm_req_set_resp_res(req_msg, param->responder_resources); |
| 988 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
| 989 | cm_req_set_remote_resp_timeout(req_msg, |
| 990 | param->remote_cm_response_timeout); |
| 991 | cm_req_set_qp_type(req_msg, param->qp_type); |
| 992 | cm_req_set_flow_ctrl(req_msg, param->flow_control); |
| 993 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); |
| 994 | cm_req_set_local_resp_timeout(req_msg, |
| 995 | param->local_cm_response_timeout); |
| 996 | cm_req_set_retry_count(req_msg, param->retry_count); |
| 997 | req_msg->pkey = param->primary_path->pkey; |
| 998 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); |
| 999 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); |
| 1000 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
| 1001 | cm_req_set_srq(req_msg, param->srq); |
| 1002 | |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1003 | if (pri_path->hop_limit <= 1) { |
| 1004 | req_msg->primary_local_lid = pri_path->slid; |
| 1005 | req_msg->primary_remote_lid = pri_path->dlid; |
| 1006 | } else { |
| 1007 | /* Work-around until there's a way to obtain remote LID info */ |
| 1008 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; |
| 1009 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; |
| 1010 | } |
| 1011 | req_msg->primary_local_gid = pri_path->sgid; |
| 1012 | req_msg->primary_remote_gid = pri_path->dgid; |
| 1013 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); |
| 1014 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); |
| 1015 | req_msg->primary_traffic_class = pri_path->traffic_class; |
| 1016 | req_msg->primary_hop_limit = pri_path->hop_limit; |
| 1017 | cm_req_set_primary_sl(req_msg, pri_path->sl); |
| 1018 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1019 | cm_req_set_primary_local_ack_timeout(req_msg, |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 1020 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1021 | pri_path->packet_life_time)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1022 | |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1023 | if (alt_path) { |
| 1024 | if (alt_path->hop_limit <= 1) { |
| 1025 | req_msg->alt_local_lid = alt_path->slid; |
| 1026 | req_msg->alt_remote_lid = alt_path->dlid; |
| 1027 | } else { |
| 1028 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; |
| 1029 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; |
| 1030 | } |
| 1031 | req_msg->alt_local_gid = alt_path->sgid; |
| 1032 | req_msg->alt_remote_gid = alt_path->dgid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1033 | cm_req_set_alt_flow_label(req_msg, |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1034 | alt_path->flow_label); |
| 1035 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); |
| 1036 | req_msg->alt_traffic_class = alt_path->traffic_class; |
| 1037 | req_msg->alt_hop_limit = alt_path->hop_limit; |
| 1038 | cm_req_set_alt_sl(req_msg, alt_path->sl); |
| 1039 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1040 | cm_req_set_alt_local_ack_timeout(req_msg, |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 1041 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1042 | alt_path->packet_life_time)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | if (param->private_data && param->private_data_len) |
| 1046 | memcpy(req_msg->private_data, param->private_data, |
| 1047 | param->private_data_len); |
| 1048 | } |
| 1049 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1050 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1051 | { |
| 1052 | /* peer-to-peer not supported */ |
| 1053 | if (param->peer_to_peer) |
| 1054 | return -EINVAL; |
| 1055 | |
| 1056 | if (!param->primary_path) |
| 1057 | return -EINVAL; |
| 1058 | |
| 1059 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) |
| 1060 | return -EINVAL; |
| 1061 | |
| 1062 | if (param->private_data && |
| 1063 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) |
| 1064 | return -EINVAL; |
| 1065 | |
| 1066 | if (param->alternate_path && |
| 1067 | (param->alternate_path->pkey != param->primary_path->pkey || |
| 1068 | param->alternate_path->mtu != param->primary_path->mtu)) |
| 1069 | return -EINVAL; |
| 1070 | |
| 1071 | return 0; |
| 1072 | } |
| 1073 | |
| 1074 | int ib_send_cm_req(struct ib_cm_id *cm_id, |
| 1075 | struct ib_cm_req_param *param) |
| 1076 | { |
| 1077 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1078 | struct cm_req_msg *req_msg; |
| 1079 | unsigned long flags; |
| 1080 | int ret; |
| 1081 | |
| 1082 | ret = cm_validate_req_param(param); |
| 1083 | if (ret) |
| 1084 | return ret; |
| 1085 | |
| 1086 | /* Verify that we're not in timewait. */ |
| 1087 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1088 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1089 | if (cm_id->state != IB_CM_IDLE) { |
| 1090 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1091 | ret = -EINVAL; |
| 1092 | goto out; |
| 1093 | } |
| 1094 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1095 | |
| 1096 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 1097 | id.local_id); |
Sean Hefty | 75df23e | 2006-07-25 19:52:01 +0300 | [diff] [blame] | 1098 | if (IS_ERR(cm_id_priv->timewait_info)) { |
| 1099 | ret = PTR_ERR(cm_id_priv->timewait_info); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1100 | goto out; |
Sean Hefty | 75df23e | 2006-07-25 19:52:01 +0300 | [diff] [blame] | 1101 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1102 | |
| 1103 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); |
| 1104 | if (ret) |
| 1105 | goto error1; |
| 1106 | if (param->alternate_path) { |
| 1107 | ret = cm_init_av_by_path(param->alternate_path, |
| 1108 | &cm_id_priv->alt_av); |
| 1109 | if (ret) |
| 1110 | goto error1; |
| 1111 | } |
| 1112 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1113 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1114 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 1115 | param->primary_path->packet_life_time) * 2 + |
| 1116 | cm_convert_to_ms( |
| 1117 | param->remote_cm_response_timeout); |
| 1118 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 1119 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 1120 | cm_id_priv->responder_resources = param->responder_resources; |
| 1121 | cm_id_priv->retry_count = param->retry_count; |
| 1122 | cm_id_priv->path_mtu = param->primary_path->mtu; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1123 | cm_id_priv->pkey = param->primary_path->pkey; |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 1124 | cm_id_priv->qp_type = param->qp_type; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1125 | |
| 1126 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); |
| 1127 | if (ret) |
| 1128 | goto error1; |
| 1129 | |
| 1130 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; |
| 1131 | cm_format_req(req_msg, cm_id_priv, param); |
| 1132 | cm_id_priv->tid = req_msg->hdr.tid; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1133 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1134 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
| 1135 | |
| 1136 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); |
| 1137 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1138 | |
| 1139 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1140 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1141 | if (ret) { |
| 1142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1143 | goto error2; |
| 1144 | } |
| 1145 | BUG_ON(cm_id->state != IB_CM_IDLE); |
| 1146 | cm_id->state = IB_CM_REQ_SENT; |
| 1147 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1148 | return 0; |
| 1149 | |
| 1150 | error2: cm_free_msg(cm_id_priv->msg); |
| 1151 | error1: kfree(cm_id_priv->timewait_info); |
| 1152 | out: return ret; |
| 1153 | } |
| 1154 | EXPORT_SYMBOL(ib_send_cm_req); |
| 1155 | |
| 1156 | static int cm_issue_rej(struct cm_port *port, |
| 1157 | struct ib_mad_recv_wc *mad_recv_wc, |
| 1158 | enum ib_cm_rej_reason reason, |
| 1159 | enum cm_msg_response msg_rejected, |
| 1160 | void *ari, u8 ari_length) |
| 1161 | { |
| 1162 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1163 | struct cm_rej_msg *rej_msg, *rcv_msg; |
| 1164 | int ret; |
| 1165 | |
| 1166 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| 1167 | if (ret) |
| 1168 | return ret; |
| 1169 | |
| 1170 | /* We just need common CM header information. Cast to any message. */ |
| 1171 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; |
| 1172 | rej_msg = (struct cm_rej_msg *) msg->mad; |
| 1173 | |
| 1174 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); |
| 1175 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; |
| 1176 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; |
| 1177 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1178 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1179 | |
| 1180 | if (ari && ari_length) { |
| 1181 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 1182 | memcpy(rej_msg->ari, ari, ari_length); |
| 1183 | } |
| 1184 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1185 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1186 | if (ret) |
| 1187 | cm_free_msg(msg); |
| 1188 | |
| 1189 | return ret; |
| 1190 | } |
| 1191 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1192 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
| 1193 | __be32 local_qpn, __be32 remote_qpn) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1194 | { |
| 1195 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || |
| 1196 | ((local_ca_guid == remote_ca_guid) && |
| 1197 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); |
| 1198 | } |
| 1199 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1200 | 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] | 1201 | struct ib_sa_path_rec *primary_path, |
| 1202 | struct ib_sa_path_rec *alt_path) |
| 1203 | { |
| 1204 | memset(primary_path, 0, sizeof *primary_path); |
| 1205 | primary_path->dgid = req_msg->primary_local_gid; |
| 1206 | primary_path->sgid = req_msg->primary_remote_gid; |
| 1207 | primary_path->dlid = req_msg->primary_local_lid; |
| 1208 | primary_path->slid = req_msg->primary_remote_lid; |
| 1209 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); |
| 1210 | primary_path->hop_limit = req_msg->primary_hop_limit; |
| 1211 | primary_path->traffic_class = req_msg->primary_traffic_class; |
| 1212 | primary_path->reversible = 1; |
| 1213 | primary_path->pkey = req_msg->pkey; |
| 1214 | primary_path->sl = cm_req_get_primary_sl(req_msg); |
| 1215 | primary_path->mtu_selector = IB_SA_EQ; |
| 1216 | primary_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1217 | primary_path->rate_selector = IB_SA_EQ; |
| 1218 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); |
| 1219 | primary_path->packet_life_time_selector = IB_SA_EQ; |
| 1220 | primary_path->packet_life_time = |
| 1221 | cm_req_get_primary_local_ack_timeout(req_msg); |
| 1222 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
| 1223 | |
| 1224 | if (req_msg->alt_local_lid) { |
| 1225 | memset(alt_path, 0, sizeof *alt_path); |
| 1226 | alt_path->dgid = req_msg->alt_local_gid; |
| 1227 | alt_path->sgid = req_msg->alt_remote_gid; |
| 1228 | alt_path->dlid = req_msg->alt_local_lid; |
| 1229 | alt_path->slid = req_msg->alt_remote_lid; |
| 1230 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); |
| 1231 | alt_path->hop_limit = req_msg->alt_hop_limit; |
| 1232 | alt_path->traffic_class = req_msg->alt_traffic_class; |
| 1233 | alt_path->reversible = 1; |
| 1234 | alt_path->pkey = req_msg->pkey; |
| 1235 | alt_path->sl = cm_req_get_alt_sl(req_msg); |
| 1236 | alt_path->mtu_selector = IB_SA_EQ; |
| 1237 | alt_path->mtu = cm_req_get_path_mtu(req_msg); |
| 1238 | alt_path->rate_selector = IB_SA_EQ; |
| 1239 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); |
| 1240 | alt_path->packet_life_time_selector = IB_SA_EQ; |
| 1241 | alt_path->packet_life_time = |
| 1242 | cm_req_get_alt_local_ack_timeout(req_msg); |
| 1243 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
| 1244 | } |
| 1245 | } |
| 1246 | |
| 1247 | static void cm_format_req_event(struct cm_work *work, |
| 1248 | struct cm_id_private *cm_id_priv, |
| 1249 | struct ib_cm_id *listen_id) |
| 1250 | { |
| 1251 | struct cm_req_msg *req_msg; |
| 1252 | struct ib_cm_req_event_param *param; |
| 1253 | |
| 1254 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1255 | param = &work->cm_event.param.req_rcvd; |
| 1256 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1257 | param->port = cm_id_priv->av.port->port_num; |
| 1258 | param->primary_path = &work->path[0]; |
| 1259 | if (req_msg->alt_local_lid) |
| 1260 | param->alternate_path = &work->path[1]; |
| 1261 | else |
| 1262 | param->alternate_path = NULL; |
| 1263 | param->remote_ca_guid = req_msg->local_ca_guid; |
| 1264 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); |
| 1265 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); |
| 1266 | param->qp_type = cm_req_get_qp_type(req_msg); |
| 1267 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); |
| 1268 | param->responder_resources = cm_req_get_init_depth(req_msg); |
| 1269 | param->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1270 | param->local_cm_response_timeout = |
| 1271 | cm_req_get_remote_resp_timeout(req_msg); |
| 1272 | param->flow_control = cm_req_get_flow_ctrl(req_msg); |
| 1273 | param->remote_cm_response_timeout = |
| 1274 | cm_req_get_local_resp_timeout(req_msg); |
| 1275 | param->retry_count = cm_req_get_retry_count(req_msg); |
| 1276 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
| 1277 | param->srq = cm_req_get_srq(req_msg); |
| 1278 | work->cm_event.private_data = &req_msg->private_data; |
| 1279 | } |
| 1280 | |
| 1281 | static void cm_process_work(struct cm_id_private *cm_id_priv, |
| 1282 | struct cm_work *work) |
| 1283 | { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1284 | int ret; |
| 1285 | |
| 1286 | /* We will typically only have the current event to report. */ |
| 1287 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); |
| 1288 | cm_free_work(work); |
| 1289 | |
| 1290 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1291 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1292 | work = cm_dequeue_work(cm_id_priv); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1293 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1294 | BUG_ON(!work); |
| 1295 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, |
| 1296 | &work->cm_event); |
| 1297 | cm_free_work(work); |
| 1298 | } |
| 1299 | cm_deref_id(cm_id_priv); |
| 1300 | if (ret) |
Michael S. Tsirkin | 04c3354 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1301 | cm_destroy_id(&cm_id_priv->id, ret); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1302 | } |
| 1303 | |
| 1304 | static void cm_format_mra(struct cm_mra_msg *mra_msg, |
| 1305 | struct cm_id_private *cm_id_priv, |
| 1306 | enum cm_msg_response msg_mraed, u8 service_timeout, |
| 1307 | const void *private_data, u8 private_data_len) |
| 1308 | { |
| 1309 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); |
| 1310 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); |
| 1311 | mra_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1312 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1313 | cm_mra_set_service_timeout(mra_msg, service_timeout); |
| 1314 | |
| 1315 | if (private_data && private_data_len) |
| 1316 | memcpy(mra_msg->private_data, private_data, private_data_len); |
| 1317 | } |
| 1318 | |
| 1319 | static void cm_format_rej(struct cm_rej_msg *rej_msg, |
| 1320 | struct cm_id_private *cm_id_priv, |
| 1321 | enum ib_cm_rej_reason reason, |
| 1322 | void *ari, |
| 1323 | u8 ari_length, |
| 1324 | const void *private_data, |
| 1325 | u8 private_data_len) |
| 1326 | { |
| 1327 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
| 1328 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1329 | |
| 1330 | switch(cm_id_priv->id.state) { |
| 1331 | case IB_CM_REQ_RCVD: |
| 1332 | rej_msg->local_comm_id = 0; |
| 1333 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1334 | break; |
| 1335 | case IB_CM_MRA_REQ_SENT: |
| 1336 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1337 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| 1338 | break; |
| 1339 | case IB_CM_REP_RCVD: |
| 1340 | case IB_CM_MRA_REP_SENT: |
| 1341 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1342 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); |
| 1343 | break; |
| 1344 | default: |
| 1345 | rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1346 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); |
| 1347 | break; |
| 1348 | } |
| 1349 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1350 | rej_msg->reason = cpu_to_be16(reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1351 | if (ari && ari_length) { |
| 1352 | cm_rej_set_reject_info_len(rej_msg, ari_length); |
| 1353 | memcpy(rej_msg->ari, ari, ari_length); |
| 1354 | } |
| 1355 | |
| 1356 | if (private_data && private_data_len) |
| 1357 | memcpy(rej_msg->private_data, private_data, private_data_len); |
| 1358 | } |
| 1359 | |
| 1360 | static void cm_dup_req_handler(struct cm_work *work, |
| 1361 | struct cm_id_private *cm_id_priv) |
| 1362 | { |
| 1363 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1364 | int ret; |
| 1365 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1366 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 1367 | counter[CM_REQ_COUNTER]); |
| 1368 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1369 | /* Quick state check to discard duplicate REQs. */ |
| 1370 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) |
| 1371 | return; |
| 1372 | |
| 1373 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1374 | if (ret) |
| 1375 | return; |
| 1376 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1377 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1378 | switch (cm_id_priv->id.state) { |
| 1379 | case IB_CM_MRA_REQ_SENT: |
| 1380 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1381 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, |
| 1382 | cm_id_priv->private_data, |
| 1383 | cm_id_priv->private_data_len); |
| 1384 | break; |
| 1385 | case IB_CM_TIMEWAIT: |
| 1386 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, |
| 1387 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); |
| 1388 | break; |
| 1389 | default: |
| 1390 | goto unlock; |
| 1391 | } |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1392 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1393 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1394 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1395 | if (ret) |
| 1396 | goto free; |
| 1397 | return; |
| 1398 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1399 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1400 | free: cm_free_msg(msg); |
| 1401 | } |
| 1402 | |
| 1403 | static struct cm_id_private * cm_match_req(struct cm_work *work, |
| 1404 | struct cm_id_private *cm_id_priv) |
| 1405 | { |
| 1406 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; |
| 1407 | struct cm_timewait_info *timewait_info; |
| 1408 | struct cm_req_msg *req_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1409 | |
| 1410 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1411 | |
Sean Hefty | d998ccc | 2007-05-21 17:38:02 -0700 | [diff] [blame] | 1412 | /* Check for possible duplicate REQ. */ |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1413 | spin_lock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1414 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1415 | if (timewait_info) { |
| 1416 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, |
| 1417 | timewait_info->work.remote_id); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1418 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1419 | if (cur_cm_id_priv) { |
| 1420 | cm_dup_req_handler(work, cur_cm_id_priv); |
| 1421 | cm_deref_id(cur_cm_id_priv); |
Sean Hefty | d998ccc | 2007-05-21 17:38:02 -0700 | [diff] [blame] | 1422 | } |
| 1423 | return NULL; |
| 1424 | } |
| 1425 | |
| 1426 | /* Check for stale connections. */ |
| 1427 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
| 1428 | if (timewait_info) { |
| 1429 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1430 | spin_unlock_irq(&cm.lock); |
Sean Hefty | d998ccc | 2007-05-21 17:38:02 -0700 | [diff] [blame] | 1431 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1432 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, |
| 1433 | NULL, 0); |
| 1434 | return NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1435 | } |
| 1436 | |
| 1437 | /* Find matching listen request. */ |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1438 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 1439 | req_msg->service_id, |
| 1440 | req_msg->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1441 | if (!listen_cm_id_priv) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1442 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1443 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1444 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1445 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, |
| 1446 | NULL, 0); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1447 | goto out; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1448 | } |
| 1449 | atomic_inc(&listen_cm_id_priv->refcount); |
| 1450 | atomic_inc(&cm_id_priv->refcount); |
| 1451 | cm_id_priv->id.state = IB_CM_REQ_RCVD; |
| 1452 | atomic_inc(&cm_id_priv->work_count); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1453 | spin_unlock_irq(&cm.lock); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 1454 | out: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1455 | return listen_cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1456 | } |
| 1457 | |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1458 | /* |
| 1459 | * Work-around for inter-subnet connections. If the LIDs are permissive, |
| 1460 | * we need to override the LID/SL data in the REQ with the LID information |
| 1461 | * in the work completion. |
| 1462 | */ |
| 1463 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) |
| 1464 | { |
| 1465 | if (!cm_req_get_primary_subnet_local(req_msg)) { |
| 1466 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { |
| 1467 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); |
| 1468 | cm_req_set_primary_sl(req_msg, wc->sl); |
| 1469 | } |
| 1470 | |
| 1471 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) |
| 1472 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); |
| 1473 | } |
| 1474 | |
| 1475 | if (!cm_req_get_alt_subnet_local(req_msg)) { |
| 1476 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { |
| 1477 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); |
| 1478 | cm_req_set_alt_sl(req_msg, wc->sl); |
| 1479 | } |
| 1480 | |
| 1481 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) |
| 1482 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); |
| 1483 | } |
| 1484 | } |
| 1485 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1486 | static int cm_req_handler(struct cm_work *work) |
| 1487 | { |
| 1488 | struct ib_cm_id *cm_id; |
| 1489 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
| 1490 | struct cm_req_msg *req_msg; |
| 1491 | int ret; |
| 1492 | |
| 1493 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1494 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1495 | 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] | 1496 | if (IS_ERR(cm_id)) |
| 1497 | return PTR_ERR(cm_id); |
| 1498 | |
| 1499 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1500 | cm_id_priv->id.remote_id = req_msg->local_comm_id; |
| 1501 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 1502 | work->mad_recv_wc->recv_buf.grh, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1503 | &cm_id_priv->av); |
| 1504 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| 1505 | id.local_id); |
| 1506 | if (IS_ERR(cm_id_priv->timewait_info)) { |
| 1507 | ret = PTR_ERR(cm_id_priv->timewait_info); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1508 | goto destroy; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1509 | } |
| 1510 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; |
| 1511 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; |
| 1512 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1513 | |
| 1514 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); |
| 1515 | if (!listen_cm_id_priv) { |
| 1516 | ret = -EINVAL; |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1517 | kfree(cm_id_priv->timewait_info); |
| 1518 | goto destroy; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1519 | } |
| 1520 | |
| 1521 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
| 1522 | cm_id_priv->id.context = listen_cm_id_priv->id.context; |
| 1523 | cm_id_priv->id.service_id = req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1524 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1525 | |
Sean Hefty | 3971c9f | 2007-12-10 15:53:25 -0800 | [diff] [blame] | 1526 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1527 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
| 1528 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1529 | if (ret) { |
| 1530 | ib_get_cached_gid(work->port->cm_dev->device, |
| 1531 | work->port->port_num, 0, &work->path[0].sgid); |
| 1532 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, |
| 1533 | &work->path[0].sgid, sizeof work->path[0].sgid, |
| 1534 | NULL, 0); |
| 1535 | goto rejected; |
| 1536 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1537 | if (req_msg->alt_local_lid) { |
| 1538 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1539 | if (ret) { |
| 1540 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, |
| 1541 | &work->path[0].sgid, |
| 1542 | sizeof work->path[0].sgid, NULL, 0); |
| 1543 | goto rejected; |
| 1544 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1545 | } |
| 1546 | cm_id_priv->tid = req_msg->hdr.tid; |
| 1547 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
| 1548 | cm_req_get_local_resp_timeout(req_msg)); |
| 1549 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); |
| 1550 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); |
| 1551 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); |
| 1552 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); |
| 1553 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1554 | cm_id_priv->pkey = req_msg->pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1555 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1556 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
| 1557 | 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] | 1558 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1559 | |
| 1560 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| 1561 | cm_process_work(cm_id_priv, work); |
| 1562 | cm_deref_id(listen_cm_id_priv); |
| 1563 | return 0; |
| 1564 | |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1565 | rejected: |
| 1566 | atomic_dec(&cm_id_priv->refcount); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1567 | cm_deref_id(listen_cm_id_priv); |
Sean Hefty | 7684240 | 2006-08-28 11:57:42 -0700 | [diff] [blame] | 1568 | destroy: |
| 1569 | ib_destroy_cm_id(cm_id); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1570 | return ret; |
| 1571 | } |
| 1572 | |
| 1573 | static void cm_format_rep(struct cm_rep_msg *rep_msg, |
| 1574 | struct cm_id_private *cm_id_priv, |
| 1575 | struct ib_cm_rep_param *param) |
| 1576 | { |
| 1577 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); |
| 1578 | rep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1579 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1580 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
| 1581 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
| 1582 | rep_msg->resp_resources = param->responder_resources; |
| 1583 | rep_msg->initiator_depth = param->initiator_depth; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 1584 | cm_rep_set_target_ack_delay(rep_msg, |
| 1585 | cm_id_priv->av.port->cm_dev->ack_delay); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1586 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
| 1587 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); |
| 1588 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
| 1589 | cm_rep_set_srq(rep_msg, param->srq); |
Sean Hefty | e971b8c | 2007-02-22 11:37:38 -0800 | [diff] [blame] | 1590 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1591 | |
| 1592 | if (param->private_data && param->private_data_len) |
| 1593 | memcpy(rep_msg->private_data, param->private_data, |
| 1594 | param->private_data_len); |
| 1595 | } |
| 1596 | |
| 1597 | int ib_send_cm_rep(struct ib_cm_id *cm_id, |
| 1598 | struct ib_cm_rep_param *param) |
| 1599 | { |
| 1600 | struct cm_id_private *cm_id_priv; |
| 1601 | struct ib_mad_send_buf *msg; |
| 1602 | struct cm_rep_msg *rep_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1603 | unsigned long flags; |
| 1604 | int ret; |
| 1605 | |
| 1606 | if (param->private_data && |
| 1607 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) |
| 1608 | return -EINVAL; |
| 1609 | |
| 1610 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1611 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1612 | if (cm_id->state != IB_CM_REQ_RCVD && |
| 1613 | cm_id->state != IB_CM_MRA_REQ_SENT) { |
| 1614 | ret = -EINVAL; |
| 1615 | goto out; |
| 1616 | } |
| 1617 | |
| 1618 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1619 | if (ret) |
| 1620 | goto out; |
| 1621 | |
| 1622 | rep_msg = (struct cm_rep_msg *) msg->mad; |
| 1623 | cm_format_rep(rep_msg, cm_id_priv, param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1624 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1625 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
| 1626 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1627 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1628 | if (ret) { |
| 1629 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1630 | cm_free_msg(msg); |
| 1631 | return ret; |
| 1632 | } |
| 1633 | |
| 1634 | cm_id->state = IB_CM_REP_SENT; |
| 1635 | cm_id_priv->msg = msg; |
| 1636 | cm_id_priv->initiator_depth = param->initiator_depth; |
| 1637 | cm_id_priv->responder_resources = param->responder_resources; |
| 1638 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1639 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1640 | |
| 1641 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1642 | return ret; |
| 1643 | } |
| 1644 | EXPORT_SYMBOL(ib_send_cm_rep); |
| 1645 | |
| 1646 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, |
| 1647 | struct cm_id_private *cm_id_priv, |
| 1648 | const void *private_data, |
| 1649 | u8 private_data_len) |
| 1650 | { |
| 1651 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); |
| 1652 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1653 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1654 | |
| 1655 | if (private_data && private_data_len) |
| 1656 | memcpy(rtu_msg->private_data, private_data, private_data_len); |
| 1657 | } |
| 1658 | |
| 1659 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, |
| 1660 | const void *private_data, |
| 1661 | u8 private_data_len) |
| 1662 | { |
| 1663 | struct cm_id_private *cm_id_priv; |
| 1664 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1665 | unsigned long flags; |
| 1666 | void *data; |
| 1667 | int ret; |
| 1668 | |
| 1669 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) |
| 1670 | return -EINVAL; |
| 1671 | |
| 1672 | data = cm_copy_private_data(private_data, private_data_len); |
| 1673 | if (IS_ERR(data)) |
| 1674 | return PTR_ERR(data); |
| 1675 | |
| 1676 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1677 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1678 | if (cm_id->state != IB_CM_REP_RCVD && |
| 1679 | cm_id->state != IB_CM_MRA_REP_SENT) { |
| 1680 | ret = -EINVAL; |
| 1681 | goto error; |
| 1682 | } |
| 1683 | |
| 1684 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1685 | if (ret) |
| 1686 | goto error; |
| 1687 | |
| 1688 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1689 | private_data, private_data_len); |
| 1690 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1691 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1692 | if (ret) { |
| 1693 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1694 | cm_free_msg(msg); |
| 1695 | kfree(data); |
| 1696 | return ret; |
| 1697 | } |
| 1698 | |
| 1699 | cm_id->state = IB_CM_ESTABLISHED; |
| 1700 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 1701 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1702 | return 0; |
| 1703 | |
| 1704 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1705 | kfree(data); |
| 1706 | return ret; |
| 1707 | } |
| 1708 | EXPORT_SYMBOL(ib_send_cm_rtu); |
| 1709 | |
| 1710 | static void cm_format_rep_event(struct cm_work *work) |
| 1711 | { |
| 1712 | struct cm_rep_msg *rep_msg; |
| 1713 | struct ib_cm_rep_event_param *param; |
| 1714 | |
| 1715 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1716 | param = &work->cm_event.param.rep_rcvd; |
| 1717 | param->remote_ca_guid = rep_msg->local_ca_guid; |
| 1718 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); |
| 1719 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); |
| 1720 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
| 1721 | param->responder_resources = rep_msg->initiator_depth; |
| 1722 | param->initiator_depth = rep_msg->resp_resources; |
| 1723 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| 1724 | param->failover_accepted = cm_rep_get_failover(rep_msg); |
| 1725 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); |
| 1726 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| 1727 | param->srq = cm_rep_get_srq(rep_msg); |
| 1728 | work->cm_event.private_data = &rep_msg->private_data; |
| 1729 | } |
| 1730 | |
| 1731 | static void cm_dup_rep_handler(struct cm_work *work) |
| 1732 | { |
| 1733 | struct cm_id_private *cm_id_priv; |
| 1734 | struct cm_rep_msg *rep_msg; |
| 1735 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1736 | int ret; |
| 1737 | |
| 1738 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; |
| 1739 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, |
| 1740 | rep_msg->local_comm_id); |
| 1741 | if (!cm_id_priv) |
| 1742 | return; |
| 1743 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1744 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 1745 | counter[CM_REP_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1746 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| 1747 | if (ret) |
| 1748 | goto deref; |
| 1749 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1750 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1751 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
| 1752 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| 1753 | cm_id_priv->private_data, |
| 1754 | cm_id_priv->private_data_len); |
| 1755 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) |
| 1756 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 1757 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, |
| 1758 | cm_id_priv->private_data, |
| 1759 | cm_id_priv->private_data_len); |
| 1760 | else |
| 1761 | goto unlock; |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1762 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1763 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1764 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1765 | if (ret) |
| 1766 | goto free; |
| 1767 | goto deref; |
| 1768 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1769 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1770 | free: cm_free_msg(msg); |
| 1771 | deref: cm_deref_id(cm_id_priv); |
| 1772 | } |
| 1773 | |
| 1774 | static int cm_rep_handler(struct cm_work *work) |
| 1775 | { |
| 1776 | struct cm_id_private *cm_id_priv; |
| 1777 | struct cm_rep_msg *rep_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1778 | int ret; |
| 1779 | |
| 1780 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1781 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); |
| 1782 | if (!cm_id_priv) { |
| 1783 | cm_dup_rep_handler(work); |
| 1784 | return -EINVAL; |
| 1785 | } |
| 1786 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1787 | cm_format_rep_event(work); |
| 1788 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1789 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1790 | switch (cm_id_priv->id.state) { |
| 1791 | case IB_CM_REQ_SENT: |
| 1792 | case IB_CM_MRA_REQ_RCVD: |
| 1793 | break; |
| 1794 | default: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1795 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1796 | ret = -EINVAL; |
| 1797 | goto error; |
| 1798 | } |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1799 | |
| 1800 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
| 1801 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; |
| 1802 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1803 | |
| 1804 | spin_lock(&cm.lock); |
| 1805 | /* Check for duplicate REP. */ |
| 1806 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { |
| 1807 | spin_unlock(&cm.lock); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1808 | spin_unlock_irq(&cm_id_priv->lock); |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1809 | ret = -EINVAL; |
| 1810 | goto error; |
| 1811 | } |
| 1812 | /* Check for a stale connection. */ |
| 1813 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { |
| 1814 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
| 1815 | &cm.remote_id_table); |
| 1816 | cm_id_priv->timewait_info->inserted_remote_id = 0; |
| 1817 | spin_unlock(&cm.lock); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1818 | spin_unlock_irq(&cm_id_priv->lock); |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1819 | cm_issue_rej(work->port, work->mad_recv_wc, |
| 1820 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, |
| 1821 | NULL, 0); |
| 1822 | ret = -EINVAL; |
| 1823 | goto error; |
| 1824 | } |
| 1825 | spin_unlock(&cm.lock); |
| 1826 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1827 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
| 1828 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; |
| 1829 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| 1830 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
| 1831 | cm_id_priv->responder_resources = rep_msg->initiator_depth; |
| 1832 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); |
| 1833 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 1834 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| 1835 | cm_id_priv->av.timeout = |
| 1836 | cm_ack_timeout(cm_id_priv->target_ack_delay, |
| 1837 | cm_id_priv->av.timeout - 1); |
| 1838 | cm_id_priv->alt_av.timeout = |
| 1839 | cm_ack_timeout(cm_id_priv->target_ack_delay, |
| 1840 | cm_id_priv->alt_av.timeout - 1); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1841 | |
| 1842 | /* todo: handle peer_to_peer */ |
| 1843 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1844 | 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] | 1845 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1846 | if (!ret) |
| 1847 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1848 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1849 | |
| 1850 | if (ret) |
| 1851 | cm_process_work(cm_id_priv, work); |
| 1852 | else |
| 1853 | cm_deref_id(cm_id_priv); |
| 1854 | return 0; |
| 1855 | |
Sean Hefty | 87fd1a1 | 2006-03-02 16:50:37 -0800 | [diff] [blame] | 1856 | error: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1857 | cm_deref_id(cm_id_priv); |
| 1858 | return ret; |
| 1859 | } |
| 1860 | |
| 1861 | static int cm_establish_handler(struct cm_work *work) |
| 1862 | { |
| 1863 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1864 | int ret; |
| 1865 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1866 | /* See comment in cm_establish about lookup. */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1867 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
| 1868 | if (!cm_id_priv) |
| 1869 | return -EINVAL; |
| 1870 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1871 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1872 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1873 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1874 | goto out; |
| 1875 | } |
| 1876 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1877 | 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] | 1878 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1879 | if (!ret) |
| 1880 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1881 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1882 | |
| 1883 | if (ret) |
| 1884 | cm_process_work(cm_id_priv, work); |
| 1885 | else |
| 1886 | cm_deref_id(cm_id_priv); |
| 1887 | return 0; |
| 1888 | out: |
| 1889 | cm_deref_id(cm_id_priv); |
| 1890 | return -EINVAL; |
| 1891 | } |
| 1892 | |
| 1893 | static int cm_rtu_handler(struct cm_work *work) |
| 1894 | { |
| 1895 | struct cm_id_private *cm_id_priv; |
| 1896 | struct cm_rtu_msg *rtu_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1897 | int ret; |
| 1898 | |
| 1899 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; |
| 1900 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, |
| 1901 | rtu_msg->local_comm_id); |
| 1902 | if (!cm_id_priv) |
| 1903 | return -EINVAL; |
| 1904 | |
| 1905 | work->cm_event.private_data = &rtu_msg->private_data; |
| 1906 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1907 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1908 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
| 1909 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1910 | spin_unlock_irq(&cm_id_priv->lock); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1911 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 1912 | counter[CM_RTU_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1913 | goto out; |
| 1914 | } |
| 1915 | cm_id_priv->id.state = IB_CM_ESTABLISHED; |
| 1916 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1917 | 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] | 1918 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 1919 | if (!ret) |
| 1920 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 1921 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1922 | |
| 1923 | if (ret) |
| 1924 | cm_process_work(cm_id_priv, work); |
| 1925 | else |
| 1926 | cm_deref_id(cm_id_priv); |
| 1927 | return 0; |
| 1928 | out: |
| 1929 | cm_deref_id(cm_id_priv); |
| 1930 | return -EINVAL; |
| 1931 | } |
| 1932 | |
| 1933 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, |
| 1934 | struct cm_id_private *cm_id_priv, |
| 1935 | const void *private_data, |
| 1936 | u8 private_data_len) |
| 1937 | { |
| 1938 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, |
| 1939 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); |
| 1940 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; |
| 1941 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 1942 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); |
| 1943 | |
| 1944 | if (private_data && private_data_len) |
| 1945 | memcpy(dreq_msg->private_data, private_data, private_data_len); |
| 1946 | } |
| 1947 | |
| 1948 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, |
| 1949 | const void *private_data, |
| 1950 | u8 private_data_len) |
| 1951 | { |
| 1952 | struct cm_id_private *cm_id_priv; |
| 1953 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1954 | unsigned long flags; |
| 1955 | int ret; |
| 1956 | |
| 1957 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
| 1958 | return -EINVAL; |
| 1959 | |
| 1960 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 1961 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 1962 | if (cm_id->state != IB_CM_ESTABLISHED) { |
| 1963 | ret = -EINVAL; |
| 1964 | goto out; |
| 1965 | } |
| 1966 | |
| 1967 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 1968 | if (ret) { |
| 1969 | cm_enter_timewait(cm_id_priv); |
| 1970 | goto out; |
| 1971 | } |
| 1972 | |
| 1973 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, |
| 1974 | private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1975 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1976 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
| 1977 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1978 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 1979 | if (ret) { |
| 1980 | cm_enter_timewait(cm_id_priv); |
| 1981 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1982 | cm_free_msg(msg); |
| 1983 | return ret; |
| 1984 | } |
| 1985 | |
| 1986 | cm_id->state = IB_CM_DREQ_SENT; |
| 1987 | cm_id_priv->msg = msg; |
| 1988 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 1989 | return ret; |
| 1990 | } |
| 1991 | EXPORT_SYMBOL(ib_send_cm_dreq); |
| 1992 | |
| 1993 | static void cm_format_drep(struct cm_drep_msg *drep_msg, |
| 1994 | struct cm_id_private *cm_id_priv, |
| 1995 | const void *private_data, |
| 1996 | u8 private_data_len) |
| 1997 | { |
| 1998 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); |
| 1999 | drep_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2000 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2001 | |
| 2002 | if (private_data && private_data_len) |
| 2003 | memcpy(drep_msg->private_data, private_data, private_data_len); |
| 2004 | } |
| 2005 | |
| 2006 | int ib_send_cm_drep(struct ib_cm_id *cm_id, |
| 2007 | const void *private_data, |
| 2008 | u8 private_data_len) |
| 2009 | { |
| 2010 | struct cm_id_private *cm_id_priv; |
| 2011 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2012 | unsigned long flags; |
| 2013 | void *data; |
| 2014 | int ret; |
| 2015 | |
| 2016 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
| 2017 | return -EINVAL; |
| 2018 | |
| 2019 | data = cm_copy_private_data(private_data, private_data_len); |
| 2020 | if (IS_ERR(data)) |
| 2021 | return PTR_ERR(data); |
| 2022 | |
| 2023 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2024 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2025 | if (cm_id->state != IB_CM_DREQ_RCVD) { |
| 2026 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2027 | kfree(data); |
| 2028 | return -EINVAL; |
| 2029 | } |
| 2030 | |
| 2031 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 2032 | cm_enter_timewait(cm_id_priv); |
| 2033 | |
| 2034 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2035 | if (ret) |
| 2036 | goto out; |
| 2037 | |
| 2038 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 2039 | private_data, private_data_len); |
| 2040 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2041 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2042 | if (ret) { |
| 2043 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2044 | cm_free_msg(msg); |
| 2045 | return ret; |
| 2046 | } |
| 2047 | |
| 2048 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2049 | return ret; |
| 2050 | } |
| 2051 | EXPORT_SYMBOL(ib_send_cm_drep); |
| 2052 | |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 2053 | static int cm_issue_drep(struct cm_port *port, |
| 2054 | struct ib_mad_recv_wc *mad_recv_wc) |
| 2055 | { |
| 2056 | struct ib_mad_send_buf *msg = NULL; |
| 2057 | struct cm_dreq_msg *dreq_msg; |
| 2058 | struct cm_drep_msg *drep_msg; |
| 2059 | int ret; |
| 2060 | |
| 2061 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| 2062 | if (ret) |
| 2063 | return ret; |
| 2064 | |
| 2065 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; |
| 2066 | drep_msg = (struct cm_drep_msg *) msg->mad; |
| 2067 | |
| 2068 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); |
| 2069 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; |
| 2070 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; |
| 2071 | |
| 2072 | ret = ib_post_send_mad(msg, NULL); |
| 2073 | if (ret) |
| 2074 | cm_free_msg(msg); |
| 2075 | |
| 2076 | return ret; |
| 2077 | } |
| 2078 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2079 | static int cm_dreq_handler(struct cm_work *work) |
| 2080 | { |
| 2081 | struct cm_id_private *cm_id_priv; |
| 2082 | struct cm_dreq_msg *dreq_msg; |
| 2083 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2084 | int ret; |
| 2085 | |
| 2086 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2087 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, |
| 2088 | dreq_msg->local_comm_id); |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 2089 | if (!cm_id_priv) { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2090 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2091 | counter[CM_DREQ_COUNTER]); |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 2092 | cm_issue_drep(work->port, work->mad_recv_wc); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2093 | return -EINVAL; |
Sean Hefty | 82a9c16 | 2006-10-04 11:37:25 -0700 | [diff] [blame] | 2094 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2095 | |
| 2096 | work->cm_event.private_data = &dreq_msg->private_data; |
| 2097 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2098 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2099 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
| 2100 | goto unlock; |
| 2101 | |
| 2102 | switch (cm_id_priv->id.state) { |
| 2103 | case IB_CM_REP_SENT: |
| 2104 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2105 | 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] | 2106 | break; |
| 2107 | case IB_CM_ESTABLISHED: |
| 2108 | case IB_CM_MRA_REP_RCVD: |
| 2109 | break; |
| 2110 | case IB_CM_TIMEWAIT: |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2111 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2112 | counter[CM_DREQ_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2113 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 2114 | goto unlock; |
| 2115 | |
| 2116 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| 2117 | cm_id_priv->private_data, |
| 2118 | cm_id_priv->private_data_len); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2119 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2120 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2121 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2122 | cm_free_msg(msg); |
| 2123 | goto deref; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2124 | case IB_CM_DREQ_RCVD: |
| 2125 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2126 | counter[CM_DREQ_COUNTER]); |
| 2127 | goto unlock; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2128 | default: |
| 2129 | goto unlock; |
| 2130 | } |
| 2131 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; |
| 2132 | cm_id_priv->tid = dreq_msg->hdr.tid; |
| 2133 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2134 | if (!ret) |
| 2135 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2136 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2137 | |
| 2138 | if (ret) |
| 2139 | cm_process_work(cm_id_priv, work); |
| 2140 | else |
| 2141 | cm_deref_id(cm_id_priv); |
| 2142 | return 0; |
| 2143 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2144 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2145 | deref: cm_deref_id(cm_id_priv); |
| 2146 | return -EINVAL; |
| 2147 | } |
| 2148 | |
| 2149 | static int cm_drep_handler(struct cm_work *work) |
| 2150 | { |
| 2151 | struct cm_id_private *cm_id_priv; |
| 2152 | struct cm_drep_msg *drep_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2153 | int ret; |
| 2154 | |
| 2155 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2156 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, |
| 2157 | drep_msg->local_comm_id); |
| 2158 | if (!cm_id_priv) |
| 2159 | return -EINVAL; |
| 2160 | |
| 2161 | work->cm_event.private_data = &drep_msg->private_data; |
| 2162 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2163 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2164 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
| 2165 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2166 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2167 | goto out; |
| 2168 | } |
| 2169 | cm_enter_timewait(cm_id_priv); |
| 2170 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2171 | 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] | 2172 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2173 | if (!ret) |
| 2174 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2175 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2176 | |
| 2177 | if (ret) |
| 2178 | cm_process_work(cm_id_priv, work); |
| 2179 | else |
| 2180 | cm_deref_id(cm_id_priv); |
| 2181 | return 0; |
| 2182 | out: |
| 2183 | cm_deref_id(cm_id_priv); |
| 2184 | return -EINVAL; |
| 2185 | } |
| 2186 | |
| 2187 | int ib_send_cm_rej(struct ib_cm_id *cm_id, |
| 2188 | enum ib_cm_rej_reason reason, |
| 2189 | void *ari, |
| 2190 | u8 ari_length, |
| 2191 | const void *private_data, |
| 2192 | u8 private_data_len) |
| 2193 | { |
| 2194 | struct cm_id_private *cm_id_priv; |
| 2195 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2196 | unsigned long flags; |
| 2197 | int ret; |
| 2198 | |
| 2199 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
| 2200 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) |
| 2201 | return -EINVAL; |
| 2202 | |
| 2203 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2204 | |
| 2205 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2206 | switch (cm_id->state) { |
| 2207 | case IB_CM_REQ_SENT: |
| 2208 | case IB_CM_MRA_REQ_RCVD: |
| 2209 | case IB_CM_REQ_RCVD: |
| 2210 | case IB_CM_MRA_REQ_SENT: |
| 2211 | case IB_CM_REP_RCVD: |
| 2212 | case IB_CM_MRA_REP_SENT: |
| 2213 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2214 | if (!ret) |
| 2215 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 2216 | cm_id_priv, reason, ari, ari_length, |
| 2217 | private_data, private_data_len); |
| 2218 | |
| 2219 | cm_reset_to_idle(cm_id_priv); |
| 2220 | break; |
| 2221 | case IB_CM_REP_SENT: |
| 2222 | case IB_CM_MRA_REP_RCVD: |
| 2223 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2224 | if (!ret) |
| 2225 | cm_format_rej((struct cm_rej_msg *) msg->mad, |
| 2226 | cm_id_priv, reason, ari, ari_length, |
| 2227 | private_data, private_data_len); |
| 2228 | |
| 2229 | cm_enter_timewait(cm_id_priv); |
| 2230 | break; |
| 2231 | default: |
| 2232 | ret = -EINVAL; |
| 2233 | goto out; |
| 2234 | } |
| 2235 | |
| 2236 | if (ret) |
| 2237 | goto out; |
| 2238 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2239 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2240 | if (ret) |
| 2241 | cm_free_msg(msg); |
| 2242 | |
| 2243 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2244 | return ret; |
| 2245 | } |
| 2246 | EXPORT_SYMBOL(ib_send_cm_rej); |
| 2247 | |
| 2248 | static void cm_format_rej_event(struct cm_work *work) |
| 2249 | { |
| 2250 | struct cm_rej_msg *rej_msg; |
| 2251 | struct ib_cm_rej_event_param *param; |
| 2252 | |
| 2253 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2254 | param = &work->cm_event.param.rej_rcvd; |
| 2255 | param->ari = rej_msg->ari; |
| 2256 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2257 | param->reason = __be16_to_cpu(rej_msg->reason); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2258 | work->cm_event.private_data = &rej_msg->private_data; |
| 2259 | } |
| 2260 | |
| 2261 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
| 2262 | { |
| 2263 | struct cm_timewait_info *timewait_info; |
| 2264 | struct cm_id_private *cm_id_priv; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2265 | __be32 remote_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2266 | |
| 2267 | remote_id = rej_msg->local_comm_id; |
| 2268 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2269 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2270 | spin_lock_irq(&cm.lock); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2271 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2272 | remote_id); |
| 2273 | if (!timewait_info) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2274 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2275 | return NULL; |
| 2276 | } |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 2277 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
| 2278 | (timewait_info->work.local_id ^ |
| 2279 | cm.random_id_operand)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2280 | if (cm_id_priv) { |
| 2281 | if (cm_id_priv->id.remote_id == remote_id) |
| 2282 | atomic_inc(&cm_id_priv->refcount); |
| 2283 | else |
| 2284 | cm_id_priv = NULL; |
| 2285 | } |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2286 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2287 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
| 2288 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); |
| 2289 | else |
| 2290 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); |
| 2291 | |
| 2292 | return cm_id_priv; |
| 2293 | } |
| 2294 | |
| 2295 | static int cm_rej_handler(struct cm_work *work) |
| 2296 | { |
| 2297 | struct cm_id_private *cm_id_priv; |
| 2298 | struct cm_rej_msg *rej_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2299 | int ret; |
| 2300 | |
| 2301 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2302 | cm_id_priv = cm_acquire_rejected_id(rej_msg); |
| 2303 | if (!cm_id_priv) |
| 2304 | return -EINVAL; |
| 2305 | |
| 2306 | cm_format_rej_event(work); |
| 2307 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2308 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2309 | switch (cm_id_priv->id.state) { |
| 2310 | case IB_CM_REQ_SENT: |
| 2311 | case IB_CM_MRA_REQ_RCVD: |
| 2312 | case IB_CM_REP_SENT: |
| 2313 | case IB_CM_MRA_REP_RCVD: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2314 | 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] | 2315 | /* fall through */ |
| 2316 | case IB_CM_REQ_RCVD: |
| 2317 | case IB_CM_MRA_REQ_SENT: |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2318 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2319 | cm_enter_timewait(cm_id_priv); |
| 2320 | else |
| 2321 | cm_reset_to_idle(cm_id_priv); |
| 2322 | break; |
| 2323 | case IB_CM_DREQ_SENT: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2324 | 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] | 2325 | /* fall through */ |
| 2326 | case IB_CM_REP_RCVD: |
| 2327 | case IB_CM_MRA_REP_SENT: |
| 2328 | case IB_CM_ESTABLISHED: |
| 2329 | cm_enter_timewait(cm_id_priv); |
| 2330 | break; |
| 2331 | default: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2332 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2333 | ret = -EINVAL; |
| 2334 | goto out; |
| 2335 | } |
| 2336 | |
| 2337 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2338 | if (!ret) |
| 2339 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2340 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2341 | |
| 2342 | if (ret) |
| 2343 | cm_process_work(cm_id_priv, work); |
| 2344 | else |
| 2345 | cm_deref_id(cm_id_priv); |
| 2346 | return 0; |
| 2347 | out: |
| 2348 | cm_deref_id(cm_id_priv); |
| 2349 | return -EINVAL; |
| 2350 | } |
| 2351 | |
| 2352 | int ib_send_cm_mra(struct ib_cm_id *cm_id, |
| 2353 | u8 service_timeout, |
| 2354 | const void *private_data, |
| 2355 | u8 private_data_len) |
| 2356 | { |
| 2357 | struct cm_id_private *cm_id_priv; |
| 2358 | struct ib_mad_send_buf *msg; |
Sean Hefty | de98b69 | 2007-08-01 13:49:53 -0700 | [diff] [blame] | 2359 | enum ib_cm_state cm_state; |
| 2360 | enum ib_cm_lap_state lap_state; |
| 2361 | enum cm_msg_response msg_response; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2362 | void *data; |
| 2363 | unsigned long flags; |
| 2364 | int ret; |
| 2365 | |
| 2366 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) |
| 2367 | return -EINVAL; |
| 2368 | |
| 2369 | data = cm_copy_private_data(private_data, private_data_len); |
| 2370 | if (IS_ERR(data)) |
| 2371 | return PTR_ERR(data); |
| 2372 | |
| 2373 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2374 | |
| 2375 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2376 | switch(cm_id_priv->id.state) { |
| 2377 | case IB_CM_REQ_RCVD: |
Sean Hefty | de98b69 | 2007-08-01 13:49:53 -0700 | [diff] [blame] | 2378 | cm_state = IB_CM_MRA_REQ_SENT; |
| 2379 | lap_state = cm_id->lap_state; |
| 2380 | msg_response = CM_MSG_RESPONSE_REQ; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2381 | break; |
| 2382 | case IB_CM_REP_RCVD: |
Sean Hefty | de98b69 | 2007-08-01 13:49:53 -0700 | [diff] [blame] | 2383 | cm_state = IB_CM_MRA_REP_SENT; |
| 2384 | lap_state = cm_id->lap_state; |
| 2385 | msg_response = CM_MSG_RESPONSE_REP; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2386 | break; |
| 2387 | case IB_CM_ESTABLISHED: |
Sean Hefty | de98b69 | 2007-08-01 13:49:53 -0700 | [diff] [blame] | 2388 | cm_state = cm_id->state; |
| 2389 | lap_state = IB_CM_MRA_LAP_SENT; |
| 2390 | msg_response = CM_MSG_RESPONSE_OTHER; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2391 | break; |
| 2392 | default: |
| 2393 | ret = -EINVAL; |
| 2394 | goto error1; |
| 2395 | } |
Sean Hefty | de98b69 | 2007-08-01 13:49:53 -0700 | [diff] [blame] | 2396 | |
| 2397 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { |
| 2398 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2399 | if (ret) |
| 2400 | goto error1; |
| 2401 | |
| 2402 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2403 | msg_response, service_timeout, |
| 2404 | private_data, private_data_len); |
| 2405 | ret = ib_post_send_mad(msg, NULL); |
| 2406 | if (ret) |
| 2407 | goto error2; |
| 2408 | } |
| 2409 | |
| 2410 | cm_id->state = cm_state; |
| 2411 | cm_id->lap_state = lap_state; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2412 | cm_id_priv->service_timeout = service_timeout; |
| 2413 | cm_set_private_data(cm_id_priv, data, private_data_len); |
| 2414 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2415 | return 0; |
| 2416 | |
| 2417 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2418 | kfree(data); |
| 2419 | return ret; |
| 2420 | |
| 2421 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2422 | kfree(data); |
| 2423 | cm_free_msg(msg); |
| 2424 | return ret; |
| 2425 | } |
| 2426 | EXPORT_SYMBOL(ib_send_cm_mra); |
| 2427 | |
| 2428 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) |
| 2429 | { |
| 2430 | switch (cm_mra_get_msg_mraed(mra_msg)) { |
| 2431 | case CM_MSG_RESPONSE_REQ: |
| 2432 | return cm_acquire_id(mra_msg->remote_comm_id, 0); |
| 2433 | case CM_MSG_RESPONSE_REP: |
| 2434 | case CM_MSG_RESPONSE_OTHER: |
| 2435 | return cm_acquire_id(mra_msg->remote_comm_id, |
| 2436 | mra_msg->local_comm_id); |
| 2437 | default: |
| 2438 | return NULL; |
| 2439 | } |
| 2440 | } |
| 2441 | |
| 2442 | static int cm_mra_handler(struct cm_work *work) |
| 2443 | { |
| 2444 | struct cm_id_private *cm_id_priv; |
| 2445 | struct cm_mra_msg *mra_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2446 | int timeout, ret; |
| 2447 | |
| 2448 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2449 | cm_id_priv = cm_acquire_mraed_id(mra_msg); |
| 2450 | if (!cm_id_priv) |
| 2451 | return -EINVAL; |
| 2452 | |
| 2453 | work->cm_event.private_data = &mra_msg->private_data; |
| 2454 | work->cm_event.param.mra_rcvd.service_timeout = |
| 2455 | cm_mra_get_service_timeout(mra_msg); |
| 2456 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 2457 | cm_convert_to_ms(cm_id_priv->av.timeout); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2458 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2459 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2460 | switch (cm_id_priv->id.state) { |
| 2461 | case IB_CM_REQ_SENT: |
| 2462 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || |
| 2463 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2464 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2465 | goto out; |
| 2466 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; |
| 2467 | break; |
| 2468 | case IB_CM_REP_SENT: |
| 2469 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || |
| 2470 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2471 | cm_id_priv->msg, timeout)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2472 | goto out; |
| 2473 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; |
| 2474 | break; |
| 2475 | case IB_CM_ESTABLISHED: |
| 2476 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || |
| 2477 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || |
| 2478 | ib_modify_mad(cm_id_priv->av.port->mad_agent, |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2479 | cm_id_priv->msg, timeout)) { |
| 2480 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) |
| 2481 | atomic_long_inc(&work->port-> |
| 2482 | counter_group[CM_RECV_DUPLICATES]. |
| 2483 | counter[CM_MRA_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2484 | goto out; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2485 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2486 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
| 2487 | break; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2488 | case IB_CM_MRA_REQ_RCVD: |
| 2489 | case IB_CM_MRA_REP_RCVD: |
| 2490 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2491 | counter[CM_MRA_COUNTER]); |
| 2492 | /* fall through */ |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2493 | default: |
| 2494 | goto out; |
| 2495 | } |
| 2496 | |
| 2497 | cm_id_priv->msg->context[1] = (void *) (unsigned long) |
| 2498 | cm_id_priv->id.state; |
| 2499 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2500 | if (!ret) |
| 2501 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2502 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2503 | |
| 2504 | if (ret) |
| 2505 | cm_process_work(cm_id_priv, work); |
| 2506 | else |
| 2507 | cm_deref_id(cm_id_priv); |
| 2508 | return 0; |
| 2509 | out: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2510 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2511 | cm_deref_id(cm_id_priv); |
| 2512 | return -EINVAL; |
| 2513 | } |
| 2514 | |
| 2515 | static void cm_format_lap(struct cm_lap_msg *lap_msg, |
| 2516 | struct cm_id_private *cm_id_priv, |
| 2517 | struct ib_sa_path_rec *alternate_path, |
| 2518 | const void *private_data, |
| 2519 | u8 private_data_len) |
| 2520 | { |
| 2521 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, |
| 2522 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); |
| 2523 | lap_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2524 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2525 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); |
| 2526 | /* todo: need remote CM response timeout */ |
| 2527 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); |
| 2528 | lap_msg->alt_local_lid = alternate_path->slid; |
| 2529 | lap_msg->alt_remote_lid = alternate_path->dlid; |
| 2530 | lap_msg->alt_local_gid = alternate_path->sgid; |
| 2531 | lap_msg->alt_remote_gid = alternate_path->dgid; |
| 2532 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); |
| 2533 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); |
| 2534 | lap_msg->alt_hop_limit = alternate_path->hop_limit; |
| 2535 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); |
| 2536 | cm_lap_set_sl(lap_msg, alternate_path->sl); |
| 2537 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ |
| 2538 | cm_lap_set_local_ack_timeout(lap_msg, |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 2539 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
| 2540 | alternate_path->packet_life_time)); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2541 | |
| 2542 | if (private_data && private_data_len) |
| 2543 | memcpy(lap_msg->private_data, private_data, private_data_len); |
| 2544 | } |
| 2545 | |
| 2546 | int ib_send_cm_lap(struct ib_cm_id *cm_id, |
| 2547 | struct ib_sa_path_rec *alternate_path, |
| 2548 | const void *private_data, |
| 2549 | u8 private_data_len) |
| 2550 | { |
| 2551 | struct cm_id_private *cm_id_priv; |
| 2552 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2553 | unsigned long flags; |
| 2554 | int ret; |
| 2555 | |
| 2556 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) |
| 2557 | return -EINVAL; |
| 2558 | |
| 2559 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2560 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2561 | if (cm_id->state != IB_CM_ESTABLISHED || |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2562 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
| 2563 | cm_id->lap_state != IB_CM_LAP_IDLE)) { |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2564 | ret = -EINVAL; |
| 2565 | goto out; |
| 2566 | } |
| 2567 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2568 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
| 2569 | if (ret) |
| 2570 | goto out; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 2571 | cm_id_priv->alt_av.timeout = |
| 2572 | cm_ack_timeout(cm_id_priv->target_ack_delay, |
| 2573 | cm_id_priv->alt_av.timeout - 1); |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2574 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2575 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2576 | if (ret) |
| 2577 | goto out; |
| 2578 | |
| 2579 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, |
| 2580 | alternate_path, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2581 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2582 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
| 2583 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2584 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2585 | if (ret) { |
| 2586 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2587 | cm_free_msg(msg); |
| 2588 | return ret; |
| 2589 | } |
| 2590 | |
| 2591 | cm_id->lap_state = IB_CM_LAP_SENT; |
| 2592 | cm_id_priv->msg = msg; |
| 2593 | |
| 2594 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2595 | return ret; |
| 2596 | } |
| 2597 | EXPORT_SYMBOL(ib_send_cm_lap); |
| 2598 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2599 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
| 2600 | struct ib_sa_path_rec *path, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2601 | struct cm_lap_msg *lap_msg) |
| 2602 | { |
| 2603 | memset(path, 0, sizeof *path); |
| 2604 | path->dgid = lap_msg->alt_local_gid; |
| 2605 | path->sgid = lap_msg->alt_remote_gid; |
| 2606 | path->dlid = lap_msg->alt_local_lid; |
| 2607 | path->slid = lap_msg->alt_remote_lid; |
| 2608 | path->flow_label = cm_lap_get_flow_label(lap_msg); |
| 2609 | path->hop_limit = lap_msg->alt_hop_limit; |
| 2610 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); |
| 2611 | path->reversible = 1; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2612 | path->pkey = cm_id_priv->pkey; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2613 | path->sl = cm_lap_get_sl(lap_msg); |
| 2614 | path->mtu_selector = IB_SA_EQ; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2615 | path->mtu = cm_id_priv->path_mtu; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2616 | path->rate_selector = IB_SA_EQ; |
| 2617 | path->rate = cm_lap_get_packet_rate(lap_msg); |
| 2618 | path->packet_life_time_selector = IB_SA_EQ; |
| 2619 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); |
| 2620 | path->packet_life_time -= (path->packet_life_time > 0); |
| 2621 | } |
| 2622 | |
| 2623 | static int cm_lap_handler(struct cm_work *work) |
| 2624 | { |
| 2625 | struct cm_id_private *cm_id_priv; |
| 2626 | struct cm_lap_msg *lap_msg; |
| 2627 | struct ib_cm_lap_event_param *param; |
| 2628 | struct ib_mad_send_buf *msg = NULL; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2629 | int ret; |
| 2630 | |
| 2631 | /* todo: verify LAP request and send reject APR if invalid. */ |
| 2632 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2633 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, |
| 2634 | lap_msg->local_comm_id); |
| 2635 | if (!cm_id_priv) |
| 2636 | return -EINVAL; |
| 2637 | |
| 2638 | param = &work->cm_event.param.lap_rcvd; |
| 2639 | param->alternate_path = &work->path[0]; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2640 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2641 | work->cm_event.private_data = &lap_msg->private_data; |
| 2642 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2643 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2644 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
| 2645 | goto unlock; |
| 2646 | |
| 2647 | switch (cm_id_priv->id.lap_state) { |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2648 | case IB_CM_LAP_UNINIT: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2649 | case IB_CM_LAP_IDLE: |
| 2650 | break; |
| 2651 | case IB_CM_MRA_LAP_SENT: |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2652 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2653 | counter[CM_LAP_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2654 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| 2655 | goto unlock; |
| 2656 | |
| 2657 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| 2658 | CM_MSG_RESPONSE_OTHER, |
| 2659 | cm_id_priv->service_timeout, |
| 2660 | cm_id_priv->private_data, |
| 2661 | cm_id_priv->private_data_len); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2662 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2663 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2664 | if (ib_post_send_mad(msg, NULL)) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2665 | cm_free_msg(msg); |
| 2666 | goto deref; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2667 | case IB_CM_LAP_RCVD: |
| 2668 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2669 | counter[CM_LAP_COUNTER]); |
| 2670 | goto unlock; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2671 | default: |
| 2672 | goto unlock; |
| 2673 | } |
| 2674 | |
| 2675 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; |
| 2676 | cm_id_priv->tid = lap_msg->hdr.tid; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 2677 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| 2678 | work->mad_recv_wc->recv_buf.grh, |
| 2679 | &cm_id_priv->av); |
| 2680 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2681 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2682 | if (!ret) |
| 2683 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2684 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2685 | |
| 2686 | if (ret) |
| 2687 | cm_process_work(cm_id_priv, work); |
| 2688 | else |
| 2689 | cm_deref_id(cm_id_priv); |
| 2690 | return 0; |
| 2691 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2692 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2693 | deref: cm_deref_id(cm_id_priv); |
| 2694 | return -EINVAL; |
| 2695 | } |
| 2696 | |
| 2697 | static void cm_format_apr(struct cm_apr_msg *apr_msg, |
| 2698 | struct cm_id_private *cm_id_priv, |
| 2699 | enum ib_cm_apr_status status, |
| 2700 | void *info, |
| 2701 | u8 info_length, |
| 2702 | const void *private_data, |
| 2703 | u8 private_data_len) |
| 2704 | { |
| 2705 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); |
| 2706 | apr_msg->local_comm_id = cm_id_priv->id.local_id; |
| 2707 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| 2708 | apr_msg->ap_status = (u8) status; |
| 2709 | |
| 2710 | if (info && info_length) { |
| 2711 | apr_msg->info_length = info_length; |
| 2712 | memcpy(apr_msg->info, info, info_length); |
| 2713 | } |
| 2714 | |
| 2715 | if (private_data && private_data_len) |
| 2716 | memcpy(apr_msg->private_data, private_data, private_data_len); |
| 2717 | } |
| 2718 | |
| 2719 | int ib_send_cm_apr(struct ib_cm_id *cm_id, |
| 2720 | enum ib_cm_apr_status status, |
| 2721 | void *info, |
| 2722 | u8 info_length, |
| 2723 | const void *private_data, |
| 2724 | u8 private_data_len) |
| 2725 | { |
| 2726 | struct cm_id_private *cm_id_priv; |
| 2727 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2728 | unsigned long flags; |
| 2729 | int ret; |
| 2730 | |
| 2731 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || |
| 2732 | (info && info_length > IB_CM_APR_INFO_LENGTH)) |
| 2733 | return -EINVAL; |
| 2734 | |
| 2735 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2736 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2737 | if (cm_id->state != IB_CM_ESTABLISHED || |
| 2738 | (cm_id->lap_state != IB_CM_LAP_RCVD && |
| 2739 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { |
| 2740 | ret = -EINVAL; |
| 2741 | goto out; |
| 2742 | } |
| 2743 | |
| 2744 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2745 | if (ret) |
| 2746 | goto out; |
| 2747 | |
| 2748 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, |
| 2749 | info, info_length, private_data, private_data_len); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2750 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2751 | if (ret) { |
| 2752 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2753 | cm_free_msg(msg); |
| 2754 | return ret; |
| 2755 | } |
| 2756 | |
| 2757 | cm_id->lap_state = IB_CM_LAP_IDLE; |
| 2758 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2759 | return ret; |
| 2760 | } |
| 2761 | EXPORT_SYMBOL(ib_send_cm_apr); |
| 2762 | |
| 2763 | static int cm_apr_handler(struct cm_work *work) |
| 2764 | { |
| 2765 | struct cm_id_private *cm_id_priv; |
| 2766 | struct cm_apr_msg *apr_msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2767 | int ret; |
| 2768 | |
| 2769 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; |
| 2770 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, |
| 2771 | apr_msg->local_comm_id); |
| 2772 | if (!cm_id_priv) |
| 2773 | return -EINVAL; /* Unmatched reply. */ |
| 2774 | |
| 2775 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; |
| 2776 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; |
| 2777 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; |
| 2778 | work->cm_event.private_data = &apr_msg->private_data; |
| 2779 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2780 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2781 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
| 2782 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && |
| 2783 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2784 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2785 | goto out; |
| 2786 | } |
| 2787 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2788 | 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] | 2789 | cm_id_priv->msg = NULL; |
| 2790 | |
| 2791 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2792 | if (!ret) |
| 2793 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2794 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2795 | |
| 2796 | if (ret) |
| 2797 | cm_process_work(cm_id_priv, work); |
| 2798 | else |
| 2799 | cm_deref_id(cm_id_priv); |
| 2800 | return 0; |
| 2801 | out: |
| 2802 | cm_deref_id(cm_id_priv); |
| 2803 | return -EINVAL; |
| 2804 | } |
| 2805 | |
| 2806 | static int cm_timewait_handler(struct cm_work *work) |
| 2807 | { |
| 2808 | struct cm_timewait_info *timewait_info; |
| 2809 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2810 | int ret; |
| 2811 | |
| 2812 | timewait_info = (struct cm_timewait_info *)work; |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2813 | spin_lock_irq(&cm.lock); |
| 2814 | list_del(&timewait_info->list); |
| 2815 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2816 | |
| 2817 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
| 2818 | timewait_info->work.remote_id); |
| 2819 | if (!cm_id_priv) |
| 2820 | return -EINVAL; |
| 2821 | |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2822 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2823 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
| 2824 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2825 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2826 | goto out; |
| 2827 | } |
| 2828 | cm_id_priv->id.state = IB_CM_IDLE; |
| 2829 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| 2830 | if (!ret) |
| 2831 | list_add_tail(&work->list, &cm_id_priv->work_list); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 2832 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2833 | |
| 2834 | if (ret) |
| 2835 | cm_process_work(cm_id_priv, work); |
| 2836 | else |
| 2837 | cm_deref_id(cm_id_priv); |
| 2838 | return 0; |
| 2839 | out: |
| 2840 | cm_deref_id(cm_id_priv); |
| 2841 | return -EINVAL; |
| 2842 | } |
| 2843 | |
| 2844 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, |
| 2845 | struct cm_id_private *cm_id_priv, |
| 2846 | struct ib_cm_sidr_req_param *param) |
| 2847 | { |
| 2848 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, |
| 2849 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); |
| 2850 | sidr_req_msg->request_id = cm_id_priv->id.local_id; |
Sean Hefty | 75af908 | 2006-06-17 20:37:39 -0700 | [diff] [blame] | 2851 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2852 | sidr_req_msg->service_id = param->service_id; |
| 2853 | |
| 2854 | if (param->private_data && param->private_data_len) |
| 2855 | memcpy(sidr_req_msg->private_data, param->private_data, |
| 2856 | param->private_data_len); |
| 2857 | } |
| 2858 | |
| 2859 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, |
| 2860 | struct ib_cm_sidr_req_param *param) |
| 2861 | { |
| 2862 | struct cm_id_private *cm_id_priv; |
| 2863 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2864 | unsigned long flags; |
| 2865 | int ret; |
| 2866 | |
| 2867 | if (!param->path || (param->private_data && |
| 2868 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) |
| 2869 | return -EINVAL; |
| 2870 | |
| 2871 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2872 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); |
| 2873 | if (ret) |
| 2874 | goto out; |
| 2875 | |
| 2876 | cm_id->service_id = param->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2877 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2878 | cm_id_priv->timeout_ms = param->timeout_ms; |
| 2879 | cm_id_priv->max_cm_retries = param->max_cm_retries; |
| 2880 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 2881 | if (ret) |
| 2882 | goto out; |
| 2883 | |
| 2884 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, |
| 2885 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2886 | msg->timeout_ms = cm_id_priv->timeout_ms; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2887 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
| 2888 | |
| 2889 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 2890 | if (cm_id->state == IB_CM_IDLE) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2891 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2892 | else |
| 2893 | ret = -EINVAL; |
| 2894 | |
| 2895 | if (ret) { |
| 2896 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2897 | cm_free_msg(msg); |
| 2898 | goto out; |
| 2899 | } |
| 2900 | cm_id->state = IB_CM_SIDR_REQ_SENT; |
| 2901 | cm_id_priv->msg = msg; |
| 2902 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 2903 | out: |
| 2904 | return ret; |
| 2905 | } |
| 2906 | EXPORT_SYMBOL(ib_send_cm_sidr_req); |
| 2907 | |
| 2908 | static void cm_format_sidr_req_event(struct cm_work *work, |
| 2909 | struct ib_cm_id *listen_id) |
| 2910 | { |
| 2911 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2912 | struct ib_cm_sidr_req_event_param *param; |
| 2913 | |
| 2914 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2915 | work->mad_recv_wc->recv_buf.mad; |
| 2916 | param = &work->cm_event.param.sidr_req_rcvd; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2917 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2918 | param->listen_id = listen_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2919 | param->port = work->port->port_num; |
| 2920 | work->cm_event.private_data = &sidr_req_msg->private_data; |
| 2921 | } |
| 2922 | |
| 2923 | static int cm_sidr_req_handler(struct cm_work *work) |
| 2924 | { |
| 2925 | struct ib_cm_id *cm_id; |
| 2926 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| 2927 | struct cm_sidr_req_msg *sidr_req_msg; |
| 2928 | struct ib_wc *wc; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2929 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2930 | 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] | 2931 | if (IS_ERR(cm_id)) |
| 2932 | return PTR_ERR(cm_id); |
| 2933 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 2934 | |
| 2935 | /* Record SGID/SLID and request ID for lookup. */ |
| 2936 | sidr_req_msg = (struct cm_sidr_req_msg *) |
| 2937 | work->mad_recv_wc->recv_buf.mad; |
| 2938 | wc = work->mad_recv_wc->wc; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2939 | 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] | 2940 | cm_id_priv->av.dgid.global.interface_id = 0; |
| 2941 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 2942 | work->mad_recv_wc->recv_buf.grh, |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2943 | &cm_id_priv->av); |
| 2944 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2945 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
| 2946 | atomic_inc(&cm_id_priv->work_count); |
| 2947 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2948 | spin_lock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2949 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
| 2950 | if (cur_cm_id_priv) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2951 | spin_unlock_irq(&cm.lock); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 2952 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
| 2953 | counter[CM_SIDR_REQ_COUNTER]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2954 | goto out; /* Duplicate message. */ |
| 2955 | } |
Sean Hefty | 29c2731 | 2007-07-02 14:36:19 -0700 | [diff] [blame] | 2956 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 2957 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 2958 | sidr_req_msg->service_id, |
| 2959 | sidr_req_msg->private_data); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2960 | if (!cur_cm_id_priv) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2961 | spin_unlock_irq(&cm.lock); |
Sean Hefty | 6164c8c | 2007-07-02 16:14:14 -0700 | [diff] [blame] | 2962 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2963 | goto out; /* No match. */ |
| 2964 | } |
| 2965 | atomic_inc(&cur_cm_id_priv->refcount); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 2966 | spin_unlock_irq(&cm.lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2967 | |
| 2968 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; |
| 2969 | cm_id_priv->id.context = cur_cm_id_priv->id.context; |
| 2970 | cm_id_priv->id.service_id = sidr_req_msg->service_id; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2971 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 2972 | |
| 2973 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); |
| 2974 | cm_process_work(cm_id_priv, work); |
| 2975 | cm_deref_id(cur_cm_id_priv); |
| 2976 | return 0; |
| 2977 | out: |
| 2978 | ib_destroy_cm_id(&cm_id_priv->id); |
| 2979 | return -EINVAL; |
| 2980 | } |
| 2981 | |
| 2982 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, |
| 2983 | struct cm_id_private *cm_id_priv, |
| 2984 | struct ib_cm_sidr_rep_param *param) |
| 2985 | { |
| 2986 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
| 2987 | cm_id_priv->tid); |
| 2988 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; |
| 2989 | sidr_rep_msg->status = param->status; |
| 2990 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); |
| 2991 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; |
| 2992 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); |
| 2993 | |
| 2994 | if (param->info && param->info_length) |
| 2995 | memcpy(sidr_rep_msg->info, param->info, param->info_length); |
| 2996 | |
| 2997 | if (param->private_data && param->private_data_len) |
| 2998 | memcpy(sidr_rep_msg->private_data, param->private_data, |
| 2999 | param->private_data_len); |
| 3000 | } |
| 3001 | |
| 3002 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
| 3003 | struct ib_cm_sidr_rep_param *param) |
| 3004 | { |
| 3005 | struct cm_id_private *cm_id_priv; |
| 3006 | struct ib_mad_send_buf *msg; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3007 | unsigned long flags; |
| 3008 | int ret; |
| 3009 | |
| 3010 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || |
| 3011 | (param->private_data && |
| 3012 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) |
| 3013 | return -EINVAL; |
| 3014 | |
| 3015 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3016 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3017 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { |
| 3018 | ret = -EINVAL; |
| 3019 | goto error; |
| 3020 | } |
| 3021 | |
| 3022 | ret = cm_alloc_msg(cm_id_priv, &msg); |
| 3023 | if (ret) |
| 3024 | goto error; |
| 3025 | |
| 3026 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, |
| 3027 | param); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 3028 | ret = ib_post_send_mad(msg, NULL); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3029 | if (ret) { |
| 3030 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3031 | cm_free_msg(msg); |
| 3032 | return ret; |
| 3033 | } |
| 3034 | cm_id->state = IB_CM_IDLE; |
| 3035 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3036 | |
| 3037 | spin_lock_irqsave(&cm.lock, flags); |
| 3038 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| 3039 | spin_unlock_irqrestore(&cm.lock, flags); |
| 3040 | return 0; |
| 3041 | |
| 3042 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3043 | return ret; |
| 3044 | } |
| 3045 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); |
| 3046 | |
| 3047 | static void cm_format_sidr_rep_event(struct cm_work *work) |
| 3048 | { |
| 3049 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 3050 | struct ib_cm_sidr_rep_event_param *param; |
| 3051 | |
| 3052 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 3053 | work->mad_recv_wc->recv_buf.mad; |
| 3054 | param = &work->cm_event.param.sidr_rep_rcvd; |
| 3055 | param->status = sidr_rep_msg->status; |
| 3056 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); |
| 3057 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); |
| 3058 | param->info = &sidr_rep_msg->info; |
| 3059 | param->info_len = sidr_rep_msg->info_length; |
| 3060 | work->cm_event.private_data = &sidr_rep_msg->private_data; |
| 3061 | } |
| 3062 | |
| 3063 | static int cm_sidr_rep_handler(struct cm_work *work) |
| 3064 | { |
| 3065 | struct cm_sidr_rep_msg *sidr_rep_msg; |
| 3066 | struct cm_id_private *cm_id_priv; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3067 | |
| 3068 | sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| 3069 | work->mad_recv_wc->recv_buf.mad; |
| 3070 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); |
| 3071 | if (!cm_id_priv) |
| 3072 | return -EINVAL; /* Unmatched reply. */ |
| 3073 | |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3074 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3075 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3076 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3077 | goto out; |
| 3078 | } |
| 3079 | cm_id_priv->id.state = IB_CM_IDLE; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 3080 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3081 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3082 | |
| 3083 | cm_format_sidr_rep_event(work); |
| 3084 | cm_process_work(cm_id_priv, work); |
| 3085 | return 0; |
| 3086 | out: |
| 3087 | cm_deref_id(cm_id_priv); |
| 3088 | return -EINVAL; |
| 3089 | } |
| 3090 | |
| 3091 | static void cm_process_send_error(struct ib_mad_send_buf *msg, |
| 3092 | enum ib_wc_status wc_status) |
| 3093 | { |
| 3094 | struct cm_id_private *cm_id_priv; |
| 3095 | struct ib_cm_event cm_event; |
| 3096 | enum ib_cm_state state; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3097 | int ret; |
| 3098 | |
| 3099 | memset(&cm_event, 0, sizeof cm_event); |
| 3100 | cm_id_priv = msg->context[0]; |
| 3101 | |
| 3102 | /* Discard old sends or ones without a response. */ |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3103 | spin_lock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3104 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
| 3105 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) |
| 3106 | goto discard; |
| 3107 | |
| 3108 | switch (state) { |
| 3109 | case IB_CM_REQ_SENT: |
| 3110 | case IB_CM_MRA_REQ_RCVD: |
| 3111 | cm_reset_to_idle(cm_id_priv); |
| 3112 | cm_event.event = IB_CM_REQ_ERROR; |
| 3113 | break; |
| 3114 | case IB_CM_REP_SENT: |
| 3115 | case IB_CM_MRA_REP_RCVD: |
| 3116 | cm_reset_to_idle(cm_id_priv); |
| 3117 | cm_event.event = IB_CM_REP_ERROR; |
| 3118 | break; |
| 3119 | case IB_CM_DREQ_SENT: |
| 3120 | cm_enter_timewait(cm_id_priv); |
| 3121 | cm_event.event = IB_CM_DREQ_ERROR; |
| 3122 | break; |
| 3123 | case IB_CM_SIDR_REQ_SENT: |
| 3124 | cm_id_priv->id.state = IB_CM_IDLE; |
| 3125 | cm_event.event = IB_CM_SIDR_REQ_ERROR; |
| 3126 | break; |
| 3127 | default: |
| 3128 | goto discard; |
| 3129 | } |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3130 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3131 | cm_event.param.send_status = wc_status; |
| 3132 | |
| 3133 | /* No other events can occur on the cm_id at this point. */ |
| 3134 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); |
| 3135 | cm_free_msg(msg); |
| 3136 | if (ret) |
| 3137 | ib_destroy_cm_id(&cm_id_priv->id); |
| 3138 | return; |
| 3139 | discard: |
Sean Hefty | 24be6e8 | 2007-06-18 11:09:36 -0700 | [diff] [blame] | 3140 | spin_unlock_irq(&cm_id_priv->lock); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3141 | cm_free_msg(msg); |
| 3142 | } |
| 3143 | |
| 3144 | static void cm_send_handler(struct ib_mad_agent *mad_agent, |
| 3145 | struct ib_mad_send_wc *mad_send_wc) |
| 3146 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 3147 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3148 | struct cm_port *port; |
| 3149 | u16 attr_index; |
| 3150 | |
| 3151 | port = mad_agent->context; |
| 3152 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) |
| 3153 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; |
| 3154 | |
| 3155 | /* |
| 3156 | * If the send was in response to a received message (context[0] is not |
| 3157 | * set to a cm_id), and is not a REJ, then it is a send that was |
| 3158 | * manually retried. |
| 3159 | */ |
| 3160 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) |
| 3161 | msg->retries = 1; |
| 3162 | |
| 3163 | atomic_long_add(1 + msg->retries, |
| 3164 | &port->counter_group[CM_XMIT].counter[attr_index]); |
| 3165 | if (msg->retries) |
| 3166 | atomic_long_add(msg->retries, |
| 3167 | &port->counter_group[CM_XMIT_RETRIES]. |
| 3168 | counter[attr_index]); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3169 | |
| 3170 | switch (mad_send_wc->status) { |
| 3171 | case IB_WC_SUCCESS: |
| 3172 | case IB_WC_WR_FLUSH_ERR: |
| 3173 | cm_free_msg(msg); |
| 3174 | break; |
| 3175 | default: |
| 3176 | if (msg->context[0] && msg->context[1]) |
| 3177 | cm_process_send_error(msg, mad_send_wc->status); |
| 3178 | else |
| 3179 | cm_free_msg(msg); |
| 3180 | break; |
| 3181 | } |
| 3182 | } |
| 3183 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3184 | static void cm_work_handler(struct work_struct *_work) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3185 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3186 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3187 | int ret; |
| 3188 | |
| 3189 | switch (work->cm_event.event) { |
| 3190 | case IB_CM_REQ_RECEIVED: |
| 3191 | ret = cm_req_handler(work); |
| 3192 | break; |
| 3193 | case IB_CM_MRA_RECEIVED: |
| 3194 | ret = cm_mra_handler(work); |
| 3195 | break; |
| 3196 | case IB_CM_REJ_RECEIVED: |
| 3197 | ret = cm_rej_handler(work); |
| 3198 | break; |
| 3199 | case IB_CM_REP_RECEIVED: |
| 3200 | ret = cm_rep_handler(work); |
| 3201 | break; |
| 3202 | case IB_CM_RTU_RECEIVED: |
| 3203 | ret = cm_rtu_handler(work); |
| 3204 | break; |
| 3205 | case IB_CM_USER_ESTABLISHED: |
| 3206 | ret = cm_establish_handler(work); |
| 3207 | break; |
| 3208 | case IB_CM_DREQ_RECEIVED: |
| 3209 | ret = cm_dreq_handler(work); |
| 3210 | break; |
| 3211 | case IB_CM_DREP_RECEIVED: |
| 3212 | ret = cm_drep_handler(work); |
| 3213 | break; |
| 3214 | case IB_CM_SIDR_REQ_RECEIVED: |
| 3215 | ret = cm_sidr_req_handler(work); |
| 3216 | break; |
| 3217 | case IB_CM_SIDR_REP_RECEIVED: |
| 3218 | ret = cm_sidr_rep_handler(work); |
| 3219 | break; |
| 3220 | case IB_CM_LAP_RECEIVED: |
| 3221 | ret = cm_lap_handler(work); |
| 3222 | break; |
| 3223 | case IB_CM_APR_RECEIVED: |
| 3224 | ret = cm_apr_handler(work); |
| 3225 | break; |
| 3226 | case IB_CM_TIMEWAIT_EXIT: |
| 3227 | ret = cm_timewait_handler(work); |
| 3228 | break; |
| 3229 | default: |
| 3230 | ret = -EINVAL; |
| 3231 | break; |
| 3232 | } |
| 3233 | if (ret) |
| 3234 | cm_free_work(work); |
| 3235 | } |
| 3236 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3237 | static int cm_establish(struct ib_cm_id *cm_id) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3238 | { |
| 3239 | struct cm_id_private *cm_id_priv; |
| 3240 | struct cm_work *work; |
| 3241 | unsigned long flags; |
| 3242 | int ret = 0; |
| 3243 | |
| 3244 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
| 3245 | if (!work) |
| 3246 | return -ENOMEM; |
| 3247 | |
| 3248 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3249 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3250 | switch (cm_id->state) |
| 3251 | { |
| 3252 | case IB_CM_REP_SENT: |
| 3253 | case IB_CM_MRA_REP_RCVD: |
| 3254 | cm_id->state = IB_CM_ESTABLISHED; |
| 3255 | break; |
| 3256 | case IB_CM_ESTABLISHED: |
| 3257 | ret = -EISCONN; |
| 3258 | break; |
| 3259 | default: |
| 3260 | ret = -EINVAL; |
| 3261 | break; |
| 3262 | } |
| 3263 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3264 | |
| 3265 | if (ret) { |
| 3266 | kfree(work); |
| 3267 | goto out; |
| 3268 | } |
| 3269 | |
| 3270 | /* |
| 3271 | * The CM worker thread may try to destroy the cm_id before it |
| 3272 | * can execute this work item. To prevent potential deadlock, |
| 3273 | * we need to find the cm_id once we're in the context of the |
| 3274 | * worker thread, rather than holding a reference on it. |
| 3275 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3276 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3277 | work->local_id = cm_id->local_id; |
| 3278 | work->remote_id = cm_id->remote_id; |
| 3279 | work->mad_recv_wc = NULL; |
| 3280 | work->cm_event.event = IB_CM_USER_ESTABLISHED; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3281 | queue_delayed_work(cm.wq, &work->work, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3282 | out: |
| 3283 | return ret; |
| 3284 | } |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3285 | |
| 3286 | static int cm_migrate(struct ib_cm_id *cm_id) |
| 3287 | { |
| 3288 | struct cm_id_private *cm_id_priv; |
| 3289 | unsigned long flags; |
| 3290 | int ret = 0; |
| 3291 | |
| 3292 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3293 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3294 | if (cm_id->state == IB_CM_ESTABLISHED && |
| 3295 | (cm_id->lap_state == IB_CM_LAP_UNINIT || |
| 3296 | cm_id->lap_state == IB_CM_LAP_IDLE)) { |
| 3297 | cm_id->lap_state = IB_CM_LAP_IDLE; |
| 3298 | cm_id_priv->av = cm_id_priv->alt_av; |
| 3299 | } else |
| 3300 | ret = -EINVAL; |
| 3301 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3302 | |
| 3303 | return ret; |
| 3304 | } |
| 3305 | |
| 3306 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) |
| 3307 | { |
| 3308 | int ret; |
| 3309 | |
| 3310 | switch (event) { |
| 3311 | case IB_EVENT_COMM_EST: |
| 3312 | ret = cm_establish(cm_id); |
| 3313 | break; |
| 3314 | case IB_EVENT_PATH_MIG: |
| 3315 | ret = cm_migrate(cm_id); |
| 3316 | break; |
| 3317 | default: |
| 3318 | ret = -EINVAL; |
| 3319 | } |
| 3320 | return ret; |
| 3321 | } |
| 3322 | EXPORT_SYMBOL(ib_cm_notify); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3323 | |
| 3324 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, |
| 3325 | struct ib_mad_recv_wc *mad_recv_wc) |
| 3326 | { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3327 | struct cm_port *port = mad_agent->context; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3328 | struct cm_work *work; |
| 3329 | enum ib_cm_event_type event; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3330 | u16 attr_id; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3331 | int paths = 0; |
| 3332 | |
| 3333 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { |
| 3334 | case CM_REQ_ATTR_ID: |
| 3335 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> |
| 3336 | alt_local_lid != 0); |
| 3337 | event = IB_CM_REQ_RECEIVED; |
| 3338 | break; |
| 3339 | case CM_MRA_ATTR_ID: |
| 3340 | event = IB_CM_MRA_RECEIVED; |
| 3341 | break; |
| 3342 | case CM_REJ_ATTR_ID: |
| 3343 | event = IB_CM_REJ_RECEIVED; |
| 3344 | break; |
| 3345 | case CM_REP_ATTR_ID: |
| 3346 | event = IB_CM_REP_RECEIVED; |
| 3347 | break; |
| 3348 | case CM_RTU_ATTR_ID: |
| 3349 | event = IB_CM_RTU_RECEIVED; |
| 3350 | break; |
| 3351 | case CM_DREQ_ATTR_ID: |
| 3352 | event = IB_CM_DREQ_RECEIVED; |
| 3353 | break; |
| 3354 | case CM_DREP_ATTR_ID: |
| 3355 | event = IB_CM_DREP_RECEIVED; |
| 3356 | break; |
| 3357 | case CM_SIDR_REQ_ATTR_ID: |
| 3358 | event = IB_CM_SIDR_REQ_RECEIVED; |
| 3359 | break; |
| 3360 | case CM_SIDR_REP_ATTR_ID: |
| 3361 | event = IB_CM_SIDR_REP_RECEIVED; |
| 3362 | break; |
| 3363 | case CM_LAP_ATTR_ID: |
| 3364 | paths = 1; |
| 3365 | event = IB_CM_LAP_RECEIVED; |
| 3366 | break; |
| 3367 | case CM_APR_ATTR_ID: |
| 3368 | event = IB_CM_APR_RECEIVED; |
| 3369 | break; |
| 3370 | default: |
| 3371 | ib_free_recv_mad(mad_recv_wc); |
| 3372 | return; |
| 3373 | } |
| 3374 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3375 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
| 3376 | atomic_long_inc(&port->counter_group[CM_RECV]. |
| 3377 | counter[attr_id - CM_ATTR_ID_OFFSET]); |
| 3378 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3379 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
| 3380 | GFP_KERNEL); |
| 3381 | if (!work) { |
| 3382 | ib_free_recv_mad(mad_recv_wc); |
| 3383 | return; |
| 3384 | } |
| 3385 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3386 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3387 | work->cm_event.event = event; |
| 3388 | work->mad_recv_wc = mad_recv_wc; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3389 | work->port = port; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3390 | queue_delayed_work(cm.wq, &work->work, 0); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3391 | } |
| 3392 | |
| 3393 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, |
| 3394 | struct ib_qp_attr *qp_attr, |
| 3395 | int *qp_attr_mask) |
| 3396 | { |
| 3397 | unsigned long flags; |
| 3398 | int ret; |
| 3399 | |
| 3400 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3401 | switch (cm_id_priv->id.state) { |
| 3402 | case IB_CM_REQ_SENT: |
| 3403 | case IB_CM_MRA_REQ_RCVD: |
| 3404 | case IB_CM_REQ_RCVD: |
| 3405 | case IB_CM_MRA_REQ_SENT: |
| 3406 | case IB_CM_REP_RCVD: |
| 3407 | case IB_CM_MRA_REP_SENT: |
| 3408 | case IB_CM_REP_SENT: |
| 3409 | case IB_CM_MRA_REP_RCVD: |
| 3410 | case IB_CM_ESTABLISHED: |
| 3411 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | |
| 3412 | IB_QP_PKEY_INDEX | IB_QP_PORT; |
Dotan Barak | e31353e | 2006-10-24 13:35:27 -0700 | [diff] [blame] | 3413 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3414 | if (cm_id_priv->responder_resources) |
Sean Hefty | c1f250c | 2006-08-28 11:55:52 -0700 | [diff] [blame] | 3415 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
| 3416 | IB_ACCESS_REMOTE_ATOMIC; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3417 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
| 3418 | qp_attr->port_num = cm_id_priv->av.port->port_num; |
| 3419 | ret = 0; |
| 3420 | break; |
| 3421 | default: |
| 3422 | ret = -EINVAL; |
| 3423 | break; |
| 3424 | } |
| 3425 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3426 | return ret; |
| 3427 | } |
| 3428 | |
| 3429 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, |
| 3430 | struct ib_qp_attr *qp_attr, |
| 3431 | int *qp_attr_mask) |
| 3432 | { |
| 3433 | unsigned long flags; |
| 3434 | int ret; |
| 3435 | |
| 3436 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3437 | switch (cm_id_priv->id.state) { |
| 3438 | case IB_CM_REQ_RCVD: |
| 3439 | case IB_CM_MRA_REQ_SENT: |
| 3440 | case IB_CM_REP_RCVD: |
| 3441 | case IB_CM_MRA_REP_SENT: |
| 3442 | case IB_CM_REP_SENT: |
| 3443 | case IB_CM_MRA_REP_RCVD: |
| 3444 | case IB_CM_ESTABLISHED: |
| 3445 | *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] | 3446 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3447 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
| 3448 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
| 3449 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); |
| 3450 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); |
Sean Hefty | ae7971a | 2005-10-24 12:33:56 -0700 | [diff] [blame] | 3451 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3452 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
| 3453 | IB_QP_MIN_RNR_TIMER; |
| 3454 | qp_attr->max_dest_rd_atomic = |
| 3455 | cm_id_priv->responder_resources; |
| 3456 | qp_attr->min_rnr_timer = 0; |
| 3457 | } |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3458 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3459 | *qp_attr_mask |= IB_QP_ALT_PATH; |
Sean Hefty | 0d8fdfd | 2006-06-30 14:10:14 -0700 | [diff] [blame] | 3460 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3461 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 3462 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3463 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
| 3464 | } |
| 3465 | ret = 0; |
| 3466 | break; |
| 3467 | default: |
| 3468 | ret = -EINVAL; |
| 3469 | break; |
| 3470 | } |
| 3471 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3472 | return ret; |
| 3473 | } |
| 3474 | |
| 3475 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, |
| 3476 | struct ib_qp_attr *qp_attr, |
| 3477 | int *qp_attr_mask) |
| 3478 | { |
| 3479 | unsigned long flags; |
| 3480 | int ret; |
| 3481 | |
| 3482 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
| 3483 | switch (cm_id_priv->id.state) { |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 3484 | /* Allow transition to RTS before sending REP */ |
| 3485 | case IB_CM_REQ_RCVD: |
| 3486 | case IB_CM_MRA_REQ_SENT: |
| 3487 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3488 | case IB_CM_REP_RCVD: |
| 3489 | case IB_CM_MRA_REP_SENT: |
| 3490 | case IB_CM_REP_SENT: |
| 3491 | case IB_CM_MRA_REP_RCVD: |
| 3492 | case IB_CM_ESTABLISHED: |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3493 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
| 3494 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
| 3495 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
| 3496 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
| 3497 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | |
| 3498 | IB_QP_RNR_RETRY | |
| 3499 | IB_QP_MAX_QP_RD_ATOMIC; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 3500 | qp_attr->timeout = cm_id_priv->av.timeout; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3501 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
| 3502 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; |
| 3503 | qp_attr->max_rd_atomic = |
| 3504 | cm_id_priv->initiator_depth; |
| 3505 | } |
| 3506 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
| 3507 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; |
| 3508 | qp_attr->path_mig_state = IB_MIG_REARM; |
| 3509 | } |
| 3510 | } else { |
| 3511 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; |
| 3512 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
| 3513 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 3514 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 3515 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3516 | qp_attr->path_mig_state = IB_MIG_REARM; |
| 3517 | } |
| 3518 | ret = 0; |
| 3519 | break; |
| 3520 | default: |
| 3521 | ret = -EINVAL; |
| 3522 | break; |
| 3523 | } |
| 3524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 3525 | return ret; |
| 3526 | } |
| 3527 | |
| 3528 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, |
| 3529 | struct ib_qp_attr *qp_attr, |
| 3530 | int *qp_attr_mask) |
| 3531 | { |
| 3532 | struct cm_id_private *cm_id_priv; |
| 3533 | int ret; |
| 3534 | |
| 3535 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| 3536 | switch (qp_attr->qp_state) { |
| 3537 | case IB_QPS_INIT: |
| 3538 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3539 | break; |
| 3540 | case IB_QPS_RTR: |
| 3541 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3542 | break; |
| 3543 | case IB_QPS_RTS: |
| 3544 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| 3545 | break; |
| 3546 | default: |
| 3547 | ret = -EINVAL; |
| 3548 | break; |
| 3549 | } |
| 3550 | return ret; |
| 3551 | } |
| 3552 | EXPORT_SYMBOL(ib_cm_init_qp_attr); |
| 3553 | |
Roland Dreier | 454a01e | 2007-07-17 18:37:43 -0700 | [diff] [blame] | 3554 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 3555 | { |
| 3556 | struct ib_device_attr attr; |
| 3557 | |
| 3558 | if (ib_query_device(cm_dev->device, &attr)) |
| 3559 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
| 3560 | else |
| 3561 | cm_dev->ack_delay = attr.local_ca_ack_delay; |
| 3562 | } |
| 3563 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3564 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
| 3565 | char *buf) |
| 3566 | { |
| 3567 | struct cm_counter_group *group; |
| 3568 | struct cm_counter_attribute *cm_attr; |
| 3569 | |
| 3570 | group = container_of(obj, struct cm_counter_group, obj); |
| 3571 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); |
| 3572 | |
| 3573 | return sprintf(buf, "%ld\n", |
| 3574 | atomic_long_read(&group->counter[cm_attr->index])); |
| 3575 | } |
| 3576 | |
| 3577 | static struct sysfs_ops cm_counter_ops = { |
| 3578 | .show = cm_show_counter |
| 3579 | }; |
| 3580 | |
| 3581 | static struct kobj_type cm_counter_obj_type = { |
| 3582 | .sysfs_ops = &cm_counter_ops, |
| 3583 | .default_attrs = cm_counter_default_attrs |
| 3584 | }; |
| 3585 | |
| 3586 | static void cm_release_port_obj(struct kobject *obj) |
| 3587 | { |
| 3588 | struct cm_port *cm_port; |
| 3589 | |
| 3590 | printk(KERN_ERR "free cm port\n"); |
| 3591 | |
| 3592 | cm_port = container_of(obj, struct cm_port, port_obj); |
| 3593 | kfree(cm_port); |
| 3594 | } |
| 3595 | |
| 3596 | static struct kobj_type cm_port_obj_type = { |
| 3597 | .release = cm_release_port_obj |
| 3598 | }; |
| 3599 | |
| 3600 | static void cm_release_dev_obj(struct kobject *obj) |
| 3601 | { |
| 3602 | struct cm_device *cm_dev; |
| 3603 | |
| 3604 | printk(KERN_ERR "free cm dev\n"); |
| 3605 | |
| 3606 | cm_dev = container_of(obj, struct cm_device, dev_obj); |
| 3607 | kfree(cm_dev); |
| 3608 | } |
| 3609 | |
| 3610 | static struct kobj_type cm_dev_obj_type = { |
| 3611 | .release = cm_release_dev_obj |
| 3612 | }; |
| 3613 | |
| 3614 | struct class cm_class = { |
| 3615 | .name = "infiniband_cm", |
| 3616 | }; |
| 3617 | EXPORT_SYMBOL(cm_class); |
| 3618 | |
| 3619 | static void cm_remove_fs_obj(struct kobject *obj) |
| 3620 | { |
| 3621 | kobject_put(obj->parent); |
| 3622 | kobject_put(obj); |
| 3623 | } |
| 3624 | |
| 3625 | static int cm_create_port_fs(struct cm_port *port) |
| 3626 | { |
| 3627 | int i, ret; |
| 3628 | |
| 3629 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, |
| 3630 | kobject_get(&port->cm_dev->dev_obj), |
| 3631 | "%d", port->port_num); |
| 3632 | if (ret) { |
| 3633 | kfree(port); |
| 3634 | return ret; |
| 3635 | } |
| 3636 | |
| 3637 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { |
| 3638 | ret = kobject_init_and_add(&port->counter_group[i].obj, |
| 3639 | &cm_counter_obj_type, |
| 3640 | kobject_get(&port->port_obj), |
| 3641 | "%s", counter_group_names[i]); |
| 3642 | if (ret) |
| 3643 | goto error; |
| 3644 | } |
| 3645 | |
| 3646 | return 0; |
| 3647 | |
| 3648 | error: |
| 3649 | while (i--) |
| 3650 | cm_remove_fs_obj(&port->counter_group[i].obj); |
| 3651 | cm_remove_fs_obj(&port->port_obj); |
| 3652 | return ret; |
| 3653 | |
| 3654 | } |
| 3655 | |
| 3656 | static void cm_remove_port_fs(struct cm_port *port) |
| 3657 | { |
| 3658 | int i; |
| 3659 | |
| 3660 | for (i = 0; i < CM_COUNTER_GROUPS; i++) |
| 3661 | cm_remove_fs_obj(&port->counter_group[i].obj); |
| 3662 | |
| 3663 | cm_remove_fs_obj(&port->port_obj); |
| 3664 | } |
| 3665 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3666 | static void cm_add_one(struct ib_device *device) |
| 3667 | { |
| 3668 | struct cm_device *cm_dev; |
| 3669 | struct cm_port *port; |
| 3670 | struct ib_mad_reg_req reg_req = { |
| 3671 | .mgmt_class = IB_MGMT_CLASS_CM, |
| 3672 | .mgmt_class_version = IB_CM_CLASS_VERSION |
| 3673 | }; |
| 3674 | struct ib_port_modify port_modify = { |
| 3675 | .set_port_cap_mask = IB_PORT_CM_SUP |
| 3676 | }; |
| 3677 | unsigned long flags; |
| 3678 | int ret; |
| 3679 | u8 i; |
| 3680 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 3681 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 3682 | return; |
| 3683 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3684 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3685 | device->phys_port_cnt, GFP_KERNEL); |
| 3686 | if (!cm_dev) |
| 3687 | return; |
| 3688 | |
| 3689 | cm_dev->device = device; |
Sean Hefty | 1d84612 | 2007-06-18 11:09:37 -0700 | [diff] [blame] | 3690 | cm_get_ack_delay(cm_dev); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3691 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3692 | ret = kobject_init_and_add(&cm_dev->dev_obj, &cm_dev_obj_type, |
| 3693 | &cm_class.subsys.kobj, "%s", device->name); |
| 3694 | if (ret) { |
| 3695 | kfree(cm_dev); |
| 3696 | return; |
| 3697 | } |
| 3698 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3699 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
| 3700 | for (i = 1; i <= device->phys_port_cnt; i++) { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3701 | port = kzalloc(sizeof *port, GFP_KERNEL); |
| 3702 | if (!port) |
| 3703 | goto error1; |
| 3704 | |
| 3705 | cm_dev->port[i-1] = port; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3706 | port->cm_dev = cm_dev; |
| 3707 | port->port_num = i; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3708 | |
| 3709 | ret = cm_create_port_fs(port); |
| 3710 | if (ret) |
| 3711 | goto error1; |
| 3712 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3713 | port->mad_agent = ib_register_mad_agent(device, i, |
| 3714 | IB_QPT_GSI, |
| 3715 | ®_req, |
| 3716 | 0, |
| 3717 | cm_send_handler, |
| 3718 | cm_recv_handler, |
| 3719 | port); |
| 3720 | if (IS_ERR(port->mad_agent)) |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3721 | goto error2; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3722 | |
| 3723 | ret = ib_modify_port(device, i, 0, &port_modify); |
| 3724 | if (ret) |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3725 | goto error3; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3726 | } |
| 3727 | ib_set_client_data(device, &cm_client, cm_dev); |
| 3728 | |
| 3729 | write_lock_irqsave(&cm.device_lock, flags); |
| 3730 | list_add_tail(&cm_dev->list, &cm.device_list); |
| 3731 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3732 | return; |
| 3733 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3734 | error3: |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3735 | ib_unregister_mad_agent(port->mad_agent); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3736 | error2: |
| 3737 | cm_remove_port_fs(port); |
Sean Hefty | cf311cd | 2006-01-10 07:39:34 -0800 | [diff] [blame] | 3738 | error1: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3739 | port_modify.set_port_cap_mask = 0; |
| 3740 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; |
| 3741 | while (--i) { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3742 | port = cm_dev->port[i-1]; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3743 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3744 | ib_unregister_mad_agent(port->mad_agent); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3745 | cm_remove_port_fs(port); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3746 | } |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3747 | cm_remove_fs_obj(&cm_dev->dev_obj); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3748 | } |
| 3749 | |
| 3750 | static void cm_remove_one(struct ib_device *device) |
| 3751 | { |
| 3752 | struct cm_device *cm_dev; |
| 3753 | struct cm_port *port; |
| 3754 | struct ib_port_modify port_modify = { |
| 3755 | .clr_port_cap_mask = IB_PORT_CM_SUP |
| 3756 | }; |
| 3757 | unsigned long flags; |
| 3758 | int i; |
| 3759 | |
| 3760 | cm_dev = ib_get_client_data(device, &cm_client); |
| 3761 | if (!cm_dev) |
| 3762 | return; |
| 3763 | |
| 3764 | write_lock_irqsave(&cm.device_lock, flags); |
| 3765 | list_del(&cm_dev->list); |
| 3766 | write_unlock_irqrestore(&cm.device_lock, flags); |
| 3767 | |
| 3768 | for (i = 1; i <= device->phys_port_cnt; i++) { |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3769 | port = cm_dev->port[i-1]; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3770 | ib_modify_port(device, port->port_num, 0, &port_modify); |
| 3771 | ib_unregister_mad_agent(port->mad_agent); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3772 | cm_remove_port_fs(port); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3773 | } |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3774 | cm_remove_fs_obj(&cm_dev->dev_obj); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3775 | } |
| 3776 | |
| 3777 | static int __init ib_cm_init(void) |
| 3778 | { |
| 3779 | int ret; |
| 3780 | |
| 3781 | memset(&cm, 0, sizeof cm); |
| 3782 | INIT_LIST_HEAD(&cm.device_list); |
| 3783 | rwlock_init(&cm.device_lock); |
| 3784 | spin_lock_init(&cm.lock); |
| 3785 | cm.listen_service_table = RB_ROOT; |
| 3786 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
| 3787 | cm.remote_id_table = RB_ROOT; |
| 3788 | cm.remote_qp_table = RB_ROOT; |
| 3789 | cm.remote_sidr_table = RB_ROOT; |
| 3790 | idr_init(&cm.local_id_table); |
Sean Hefty | f06d265 | 2006-08-28 15:15:18 -0700 | [diff] [blame] | 3791 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3792 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3793 | INIT_LIST_HEAD(&cm.timewait_list); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3794 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3795 | ret = class_register(&cm_class); |
| 3796 | if (ret) |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3797 | return -ENOMEM; |
| 3798 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3799 | cm.wq = create_workqueue("ib_cm"); |
| 3800 | if (!cm.wq) { |
| 3801 | ret = -ENOMEM; |
| 3802 | goto error1; |
| 3803 | } |
| 3804 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3805 | ret = ib_register_client(&cm_client); |
| 3806 | if (ret) |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3807 | goto error2; |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3808 | |
| 3809 | return 0; |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3810 | error2: |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3811 | destroy_workqueue(cm.wq); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3812 | error1: |
| 3813 | class_unregister(&cm_class); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3814 | return ret; |
| 3815 | } |
| 3816 | |
| 3817 | static void __exit ib_cm_cleanup(void) |
| 3818 | { |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3819 | struct cm_timewait_info *timewait_info, *tmp; |
| 3820 | |
| 3821 | spin_lock_irq(&cm.lock); |
| 3822 | list_for_each_entry(timewait_info, &cm.timewait_list, list) |
| 3823 | cancel_delayed_work(&timewait_info->work.work); |
| 3824 | spin_unlock_irq(&cm.lock); |
| 3825 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3826 | destroy_workqueue(cm.wq); |
Sean Hefty | 8575329 | 2006-10-04 11:29:59 -0700 | [diff] [blame] | 3827 | |
| 3828 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { |
| 3829 | list_del(&timewait_info->list); |
| 3830 | kfree(timewait_info); |
| 3831 | } |
| 3832 | |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3833 | ib_unregister_client(&cm_client); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 3834 | class_unregister(&cm_class); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 3835 | idr_destroy(&cm.local_id_table); |
Hal Rosenstock | a977049 | 2005-07-27 11:45:40 -0700 | [diff] [blame] | 3836 | } |
| 3837 | |
| 3838 | module_init(ib_cm_init); |
| 3839 | module_exit(ib_cm_cleanup); |
| 3840 | |