Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Intel Inc. All rights reserved. |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 3 | * Copyright (c) 2005-2006 Voltaire, Inc. All rights reserved. |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | * |
| 33 | * $Id: mad_rmpp.c 1921 2005-03-02 22:58:44Z sean.hefty $ |
| 34 | */ |
| 35 | |
| 36 | #include <linux/dma-mapping.h> |
| 37 | |
| 38 | #include "mad_priv.h" |
| 39 | #include "mad_rmpp.h" |
| 40 | |
| 41 | enum rmpp_state { |
| 42 | RMPP_STATE_ACTIVE, |
| 43 | RMPP_STATE_TIMEOUT, |
| 44 | RMPP_STATE_COMPLETE |
| 45 | }; |
| 46 | |
| 47 | struct mad_rmpp_recv { |
| 48 | struct ib_mad_agent_private *agent; |
| 49 | struct list_head list; |
| 50 | struct work_struct timeout_work; |
| 51 | struct work_struct cleanup_work; |
| 52 | wait_queue_head_t wait; |
| 53 | enum rmpp_state state; |
| 54 | spinlock_t lock; |
| 55 | atomic_t refcount; |
| 56 | |
| 57 | struct ib_ah *ah; |
| 58 | struct ib_mad_recv_wc *rmpp_wc; |
| 59 | struct ib_mad_recv_buf *cur_seg_buf; |
| 60 | int last_ack; |
| 61 | int seg_num; |
| 62 | int newwin; |
| 63 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 64 | __be64 tid; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 65 | u32 src_qp; |
| 66 | u16 slid; |
| 67 | u8 mgmt_class; |
| 68 | u8 class_version; |
| 69 | u8 method; |
| 70 | }; |
| 71 | |
| 72 | static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
| 73 | { |
| 74 | atomic_dec(&rmpp_recv->refcount); |
| 75 | wait_event(rmpp_recv->wait, !atomic_read(&rmpp_recv->refcount)); |
| 76 | ib_destroy_ah(rmpp_recv->ah); |
| 77 | kfree(rmpp_recv); |
| 78 | } |
| 79 | |
| 80 | void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent) |
| 81 | { |
| 82 | struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv; |
| 83 | unsigned long flags; |
| 84 | |
| 85 | spin_lock_irqsave(&agent->lock, flags); |
| 86 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
| 87 | cancel_delayed_work(&rmpp_recv->timeout_work); |
| 88 | cancel_delayed_work(&rmpp_recv->cleanup_work); |
| 89 | } |
| 90 | spin_unlock_irqrestore(&agent->lock, flags); |
| 91 | |
| 92 | flush_workqueue(agent->qp_info->port_priv->wq); |
| 93 | |
| 94 | list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv, |
| 95 | &agent->rmpp_list, list) { |
| 96 | list_del(&rmpp_recv->list); |
| 97 | if (rmpp_recv->state != RMPP_STATE_COMPLETE) |
| 98 | ib_free_recv_mad(rmpp_recv->rmpp_wc); |
| 99 | destroy_rmpp_recv(rmpp_recv); |
| 100 | } |
| 101 | } |
| 102 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 103 | static void format_ack(struct ib_mad_send_buf *msg, |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 104 | struct ib_rmpp_mad *data, |
| 105 | struct mad_rmpp_recv *rmpp_recv) |
| 106 | { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 107 | struct ib_rmpp_mad *ack = msg->mad; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 108 | unsigned long flags; |
| 109 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 110 | memcpy(ack, &data->mad_hdr, msg->hdr_len); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 111 | |
| 112 | ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP; |
| 113 | ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK; |
| 114 | ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| 115 | |
| 116 | spin_lock_irqsave(&rmpp_recv->lock, flags); |
| 117 | rmpp_recv->last_ack = rmpp_recv->seg_num; |
| 118 | ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num); |
| 119 | ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin); |
| 120 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 121 | } |
| 122 | |
| 123 | static void ack_recv(struct mad_rmpp_recv *rmpp_recv, |
| 124 | struct ib_mad_recv_wc *recv_wc) |
| 125 | { |
| 126 | struct ib_mad_send_buf *msg; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 127 | int ret, hdr_len; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 128 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 129 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 130 | msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp, |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 131 | recv_wc->wc->pkey_index, 1, hdr_len, |
| 132 | 0, GFP_KERNEL); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 133 | if (!msg) |
| 134 | return; |
| 135 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 136 | format_ack(msg, (struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 137 | msg->ah = rmpp_recv->ah; |
| 138 | ret = ib_post_send_mad(msg, NULL); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 139 | if (ret) |
| 140 | ib_free_send_mad(msg); |
| 141 | } |
| 142 | |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 143 | static struct ib_mad_send_buf *alloc_response_msg(struct ib_mad_agent *agent, |
| 144 | struct ib_mad_recv_wc *recv_wc) |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 145 | { |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 146 | struct ib_mad_send_buf *msg; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 147 | struct ib_ah *ah; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 148 | int hdr_len; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 149 | |
| 150 | ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, |
| 151 | recv_wc->recv_buf.grh, agent->port_num); |
| 152 | if (IS_ERR(ah)) |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 153 | return (void *) ah; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 154 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 155 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 156 | msg = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
| 157 | recv_wc->wc->pkey_index, 1, |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 158 | hdr_len, 0, GFP_KERNEL); |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 159 | if (IS_ERR(msg)) |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 160 | ib_destroy_ah(ah); |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 161 | else |
| 162 | msg->ah = ah; |
| 163 | |
| 164 | return msg; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 167 | void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc) |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 168 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 169 | struct ib_rmpp_mad *rmpp_mad = mad_send_wc->send_buf->mad; |
| 170 | |
| 171 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_ACK) |
| 172 | ib_destroy_ah(mad_send_wc->send_buf->ah); |
| 173 | ib_free_send_mad(mad_send_wc->send_buf); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | static void nack_recv(struct ib_mad_agent_private *agent, |
| 177 | struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) |
| 178 | { |
| 179 | struct ib_mad_send_buf *msg; |
| 180 | struct ib_rmpp_mad *rmpp_mad; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 181 | int ret; |
| 182 | |
Roland Dreier | 7cc656e | 2005-10-25 15:13:54 -0700 | [diff] [blame] | 183 | msg = alloc_response_msg(&agent->agent, recv_wc); |
| 184 | if (IS_ERR(msg)) |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 185 | return; |
| 186 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 187 | rmpp_mad = msg->mad; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 188 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 189 | |
| 190 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; |
| 191 | rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; |
| 192 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; |
| 193 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| 194 | rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; |
| 195 | rmpp_mad->rmpp_hdr.seg_num = 0; |
| 196 | rmpp_mad->rmpp_hdr.paylen_newwin = 0; |
| 197 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 198 | ret = ib_post_send_mad(msg, NULL); |
| 199 | if (ret) { |
| 200 | ib_destroy_ah(msg->ah); |
| 201 | ib_free_send_mad(msg); |
| 202 | } |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 205 | static void recv_timeout_handler(void *data) |
| 206 | { |
| 207 | struct mad_rmpp_recv *rmpp_recv = data; |
| 208 | struct ib_mad_recv_wc *rmpp_wc; |
| 209 | unsigned long flags; |
| 210 | |
| 211 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); |
| 212 | if (rmpp_recv->state != RMPP_STATE_ACTIVE) { |
| 213 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); |
| 214 | return; |
| 215 | } |
| 216 | rmpp_recv->state = RMPP_STATE_TIMEOUT; |
| 217 | list_del(&rmpp_recv->list); |
| 218 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); |
| 219 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 220 | rmpp_wc = rmpp_recv->rmpp_wc; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 221 | nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 222 | destroy_rmpp_recv(rmpp_recv); |
| 223 | ib_free_recv_mad(rmpp_wc); |
| 224 | } |
| 225 | |
| 226 | static void recv_cleanup_handler(void *data) |
| 227 | { |
| 228 | struct mad_rmpp_recv *rmpp_recv = data; |
| 229 | unsigned long flags; |
| 230 | |
| 231 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); |
| 232 | list_del(&rmpp_recv->list); |
| 233 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); |
| 234 | destroy_rmpp_recv(rmpp_recv); |
| 235 | } |
| 236 | |
| 237 | static struct mad_rmpp_recv * |
| 238 | create_rmpp_recv(struct ib_mad_agent_private *agent, |
| 239 | struct ib_mad_recv_wc *mad_recv_wc) |
| 240 | { |
| 241 | struct mad_rmpp_recv *rmpp_recv; |
| 242 | struct ib_mad_hdr *mad_hdr; |
| 243 | |
| 244 | rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL); |
| 245 | if (!rmpp_recv) |
| 246 | return NULL; |
| 247 | |
| 248 | rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd, |
| 249 | mad_recv_wc->wc, |
| 250 | mad_recv_wc->recv_buf.grh, |
| 251 | agent->agent.port_num); |
| 252 | if (IS_ERR(rmpp_recv->ah)) |
| 253 | goto error; |
| 254 | |
| 255 | rmpp_recv->agent = agent; |
| 256 | init_waitqueue_head(&rmpp_recv->wait); |
| 257 | INIT_WORK(&rmpp_recv->timeout_work, recv_timeout_handler, rmpp_recv); |
| 258 | INIT_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler, rmpp_recv); |
| 259 | spin_lock_init(&rmpp_recv->lock); |
| 260 | rmpp_recv->state = RMPP_STATE_ACTIVE; |
| 261 | atomic_set(&rmpp_recv->refcount, 1); |
| 262 | |
| 263 | rmpp_recv->rmpp_wc = mad_recv_wc; |
| 264 | rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf; |
| 265 | rmpp_recv->newwin = 1; |
| 266 | rmpp_recv->seg_num = 1; |
| 267 | rmpp_recv->last_ack = 0; |
| 268 | |
| 269 | mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; |
| 270 | rmpp_recv->tid = mad_hdr->tid; |
| 271 | rmpp_recv->src_qp = mad_recv_wc->wc->src_qp; |
| 272 | rmpp_recv->slid = mad_recv_wc->wc->slid; |
| 273 | rmpp_recv->mgmt_class = mad_hdr->mgmt_class; |
| 274 | rmpp_recv->class_version = mad_hdr->class_version; |
| 275 | rmpp_recv->method = mad_hdr->method; |
| 276 | return rmpp_recv; |
| 277 | |
| 278 | error: kfree(rmpp_recv); |
| 279 | return NULL; |
| 280 | } |
| 281 | |
| 282 | static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
| 283 | { |
| 284 | if (atomic_dec_and_test(&rmpp_recv->refcount)) |
| 285 | wake_up(&rmpp_recv->wait); |
| 286 | } |
| 287 | |
| 288 | static struct mad_rmpp_recv * |
| 289 | find_rmpp_recv(struct ib_mad_agent_private *agent, |
| 290 | struct ib_mad_recv_wc *mad_recv_wc) |
| 291 | { |
| 292 | struct mad_rmpp_recv *rmpp_recv; |
| 293 | struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; |
| 294 | |
| 295 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
| 296 | if (rmpp_recv->tid == mad_hdr->tid && |
| 297 | rmpp_recv->src_qp == mad_recv_wc->wc->src_qp && |
| 298 | rmpp_recv->slid == mad_recv_wc->wc->slid && |
| 299 | rmpp_recv->mgmt_class == mad_hdr->mgmt_class && |
| 300 | rmpp_recv->class_version == mad_hdr->class_version && |
| 301 | rmpp_recv->method == mad_hdr->method) |
| 302 | return rmpp_recv; |
| 303 | } |
| 304 | return NULL; |
| 305 | } |
| 306 | |
| 307 | static struct mad_rmpp_recv * |
| 308 | acquire_rmpp_recv(struct ib_mad_agent_private *agent, |
| 309 | struct ib_mad_recv_wc *mad_recv_wc) |
| 310 | { |
| 311 | struct mad_rmpp_recv *rmpp_recv; |
| 312 | unsigned long flags; |
| 313 | |
| 314 | spin_lock_irqsave(&agent->lock, flags); |
| 315 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); |
| 316 | if (rmpp_recv) |
| 317 | atomic_inc(&rmpp_recv->refcount); |
| 318 | spin_unlock_irqrestore(&agent->lock, flags); |
| 319 | return rmpp_recv; |
| 320 | } |
| 321 | |
| 322 | static struct mad_rmpp_recv * |
| 323 | insert_rmpp_recv(struct ib_mad_agent_private *agent, |
| 324 | struct mad_rmpp_recv *rmpp_recv) |
| 325 | { |
| 326 | struct mad_rmpp_recv *cur_rmpp_recv; |
| 327 | |
| 328 | cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc); |
| 329 | if (!cur_rmpp_recv) |
| 330 | list_add_tail(&rmpp_recv->list, &agent->rmpp_list); |
| 331 | |
| 332 | return cur_rmpp_recv; |
| 333 | } |
| 334 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 335 | static inline int get_last_flag(struct ib_mad_recv_buf *seg) |
| 336 | { |
| 337 | struct ib_rmpp_mad *rmpp_mad; |
| 338 | |
| 339 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; |
| 340 | return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST; |
| 341 | } |
| 342 | |
| 343 | static inline int get_seg_num(struct ib_mad_recv_buf *seg) |
| 344 | { |
| 345 | struct ib_rmpp_mad *rmpp_mad; |
| 346 | |
| 347 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; |
| 348 | return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); |
| 349 | } |
| 350 | |
| 351 | static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list, |
| 352 | struct ib_mad_recv_buf *seg) |
| 353 | { |
| 354 | if (seg->list.next == rmpp_list) |
| 355 | return NULL; |
| 356 | |
| 357 | return container_of(seg->list.next, struct ib_mad_recv_buf, list); |
| 358 | } |
| 359 | |
| 360 | static inline int window_size(struct ib_mad_agent_private *agent) |
| 361 | { |
| 362 | return max(agent->qp_info->recv_queue.max_active >> 3, 1); |
| 363 | } |
| 364 | |
| 365 | static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list, |
| 366 | int seg_num) |
| 367 | { |
| 368 | struct ib_mad_recv_buf *seg_buf; |
| 369 | int cur_seg_num; |
| 370 | |
| 371 | list_for_each_entry_reverse(seg_buf, rmpp_list, list) { |
| 372 | cur_seg_num = get_seg_num(seg_buf); |
| 373 | if (seg_num > cur_seg_num) |
| 374 | return seg_buf; |
| 375 | if (seg_num == cur_seg_num) |
| 376 | break; |
| 377 | } |
| 378 | return NULL; |
| 379 | } |
| 380 | |
| 381 | static void update_seg_num(struct mad_rmpp_recv *rmpp_recv, |
| 382 | struct ib_mad_recv_buf *new_buf) |
| 383 | { |
| 384 | struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list; |
| 385 | |
| 386 | while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) { |
| 387 | rmpp_recv->cur_seg_buf = new_buf; |
| 388 | rmpp_recv->seg_num++; |
| 389 | new_buf = get_next_seg(rmpp_list, new_buf); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv) |
| 394 | { |
| 395 | struct ib_rmpp_mad *rmpp_mad; |
| 396 | int hdr_size, data_size, pad; |
| 397 | |
| 398 | rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad; |
| 399 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 400 | hdr_size = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 401 | data_size = sizeof(struct ib_rmpp_mad) - hdr_size; |
Hal Rosenstock | f2065e4 | 2005-09-21 12:33:09 -0700 | [diff] [blame] | 402 | pad = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
| 403 | if (pad > IB_MGMT_RMPP_DATA || pad < 0) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 404 | pad = 0; |
| 405 | |
| 406 | return hdr_size + rmpp_recv->seg_num * data_size - pad; |
| 407 | } |
| 408 | |
| 409 | static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv) |
| 410 | { |
| 411 | struct ib_mad_recv_wc *rmpp_wc; |
| 412 | |
| 413 | ack_recv(rmpp_recv, rmpp_recv->rmpp_wc); |
| 414 | if (rmpp_recv->seg_num > 1) |
| 415 | cancel_delayed_work(&rmpp_recv->timeout_work); |
| 416 | |
| 417 | rmpp_wc = rmpp_recv->rmpp_wc; |
| 418 | rmpp_wc->mad_len = get_mad_len(rmpp_recv); |
| 419 | /* 10 seconds until we can find the packet lifetime */ |
| 420 | queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq, |
| 421 | &rmpp_recv->cleanup_work, msecs_to_jiffies(10000)); |
| 422 | return rmpp_wc; |
| 423 | } |
| 424 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 425 | static struct ib_mad_recv_wc * |
| 426 | continue_rmpp(struct ib_mad_agent_private *agent, |
| 427 | struct ib_mad_recv_wc *mad_recv_wc) |
| 428 | { |
| 429 | struct mad_rmpp_recv *rmpp_recv; |
| 430 | struct ib_mad_recv_buf *prev_buf; |
| 431 | struct ib_mad_recv_wc *done_wc; |
| 432 | int seg_num; |
| 433 | unsigned long flags; |
| 434 | |
| 435 | rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc); |
| 436 | if (!rmpp_recv) |
| 437 | goto drop1; |
| 438 | |
| 439 | seg_num = get_seg_num(&mad_recv_wc->recv_buf); |
| 440 | |
| 441 | spin_lock_irqsave(&rmpp_recv->lock, flags); |
| 442 | if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) || |
| 443 | (seg_num > rmpp_recv->newwin)) |
| 444 | goto drop3; |
| 445 | |
| 446 | if ((seg_num <= rmpp_recv->last_ack) || |
| 447 | (rmpp_recv->state == RMPP_STATE_COMPLETE)) { |
| 448 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 449 | ack_recv(rmpp_recv, mad_recv_wc); |
| 450 | goto drop2; |
| 451 | } |
| 452 | |
| 453 | prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num); |
| 454 | if (!prev_buf) |
| 455 | goto drop3; |
| 456 | |
| 457 | done_wc = NULL; |
| 458 | list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list); |
| 459 | if (rmpp_recv->cur_seg_buf == prev_buf) { |
| 460 | update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf); |
| 461 | if (get_last_flag(rmpp_recv->cur_seg_buf)) { |
| 462 | rmpp_recv->state = RMPP_STATE_COMPLETE; |
| 463 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 464 | done_wc = complete_rmpp(rmpp_recv); |
| 465 | goto out; |
| 466 | } else if (rmpp_recv->seg_num == rmpp_recv->newwin) { |
| 467 | rmpp_recv->newwin += window_size(agent); |
| 468 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 469 | ack_recv(rmpp_recv, mad_recv_wc); |
| 470 | goto out; |
| 471 | } |
| 472 | } |
| 473 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 474 | out: |
| 475 | deref_rmpp_recv(rmpp_recv); |
| 476 | return done_wc; |
| 477 | |
| 478 | drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
| 479 | drop2: deref_rmpp_recv(rmpp_recv); |
| 480 | drop1: ib_free_recv_mad(mad_recv_wc); |
| 481 | return NULL; |
| 482 | } |
| 483 | |
| 484 | static struct ib_mad_recv_wc * |
| 485 | start_rmpp(struct ib_mad_agent_private *agent, |
| 486 | struct ib_mad_recv_wc *mad_recv_wc) |
| 487 | { |
| 488 | struct mad_rmpp_recv *rmpp_recv; |
| 489 | unsigned long flags; |
| 490 | |
| 491 | rmpp_recv = create_rmpp_recv(agent, mad_recv_wc); |
| 492 | if (!rmpp_recv) { |
| 493 | ib_free_recv_mad(mad_recv_wc); |
| 494 | return NULL; |
| 495 | } |
| 496 | |
| 497 | spin_lock_irqsave(&agent->lock, flags); |
| 498 | if (insert_rmpp_recv(agent, rmpp_recv)) { |
| 499 | spin_unlock_irqrestore(&agent->lock, flags); |
| 500 | /* duplicate first MAD */ |
| 501 | destroy_rmpp_recv(rmpp_recv); |
| 502 | return continue_rmpp(agent, mad_recv_wc); |
| 503 | } |
| 504 | atomic_inc(&rmpp_recv->refcount); |
| 505 | |
| 506 | if (get_last_flag(&mad_recv_wc->recv_buf)) { |
| 507 | rmpp_recv->state = RMPP_STATE_COMPLETE; |
| 508 | spin_unlock_irqrestore(&agent->lock, flags); |
| 509 | complete_rmpp(rmpp_recv); |
| 510 | } else { |
| 511 | spin_unlock_irqrestore(&agent->lock, flags); |
| 512 | /* 40 seconds until we can find the packet lifetimes */ |
| 513 | queue_delayed_work(agent->qp_info->port_priv->wq, |
| 514 | &rmpp_recv->timeout_work, |
| 515 | msecs_to_jiffies(40000)); |
| 516 | rmpp_recv->newwin += window_size(agent); |
| 517 | ack_recv(rmpp_recv, mad_recv_wc); |
| 518 | mad_recv_wc = NULL; |
| 519 | } |
| 520 | deref_rmpp_recv(rmpp_recv); |
| 521 | return mad_recv_wc; |
| 522 | } |
| 523 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 524 | static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr) |
| 525 | { |
| 526 | struct ib_rmpp_mad *rmpp_mad; |
| 527 | int timeout; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 528 | u32 paylen = 0; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 529 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 530 | rmpp_mad = mad_send_wr->send_buf.mad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 531 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 532 | rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(++mad_send_wr->seg_num); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 533 | |
| 534 | if (mad_send_wr->seg_num == 1) { |
| 535 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 536 | paylen = mad_send_wr->send_buf.seg_count * IB_MGMT_RMPP_DATA - |
Sean Hefty | 972d512 | 2005-09-21 12:31:26 -0700 | [diff] [blame] | 537 | mad_send_wr->pad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 538 | } |
| 539 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 540 | if (mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 541 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
Sean Hefty | 972d512 | 2005-09-21 12:31:26 -0700 | [diff] [blame] | 542 | paylen = IB_MGMT_RMPP_DATA - mad_send_wr->pad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 543 | } |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 544 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 545 | |
| 546 | /* 2 seconds for an ACK until we can find the packet lifetime */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 547 | timeout = mad_send_wr->send_buf.timeout_ms; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 548 | if (!timeout || timeout > 2000) |
| 549 | mad_send_wr->timeout = msecs_to_jiffies(2000); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 550 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 551 | return ib_send_mad(mad_send_wr); |
| 552 | } |
| 553 | |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 554 | static void abort_send(struct ib_mad_agent_private *agent, |
| 555 | struct ib_mad_recv_wc *mad_recv_wc, u8 rmpp_status) |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 556 | { |
| 557 | struct ib_mad_send_wr_private *mad_send_wr; |
| 558 | struct ib_mad_send_wc wc; |
| 559 | unsigned long flags; |
| 560 | |
| 561 | spin_lock_irqsave(&agent->lock, flags); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 562 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 563 | if (!mad_send_wr) |
| 564 | goto out; /* Unmatched send */ |
| 565 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 566 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 567 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
| 568 | goto out; /* Send is already done */ |
| 569 | |
| 570 | ib_mark_mad_done(mad_send_wr); |
| 571 | spin_unlock_irqrestore(&agent->lock, flags); |
| 572 | |
| 573 | wc.status = IB_WC_REM_ABORT_ERR; |
| 574 | wc.vendor_err = rmpp_status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 575 | wc.send_buf = &mad_send_wr->send_buf; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 576 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
| 577 | return; |
| 578 | out: |
| 579 | spin_unlock_irqrestore(&agent->lock, flags); |
| 580 | } |
| 581 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 582 | static inline void adjust_last_ack(struct ib_mad_send_wr_private *wr, |
| 583 | int seg_num) |
| 584 | { |
| 585 | struct list_head *list; |
| 586 | |
| 587 | wr->last_ack = seg_num; |
| 588 | list = &wr->last_ack_seg->list; |
| 589 | list_for_each_entry(wr->last_ack_seg, list, list) |
| 590 | if (wr->last_ack_seg->num == seg_num) |
| 591 | break; |
| 592 | } |
| 593 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 594 | static void process_rmpp_ack(struct ib_mad_agent_private *agent, |
| 595 | struct ib_mad_recv_wc *mad_recv_wc) |
| 596 | { |
| 597 | struct ib_mad_send_wr_private *mad_send_wr; |
| 598 | struct ib_rmpp_mad *rmpp_mad; |
| 599 | unsigned long flags; |
| 600 | int seg_num, newwin, ret; |
| 601 | |
| 602 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 603 | if (rmpp_mad->rmpp_hdr.rmpp_status) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 604 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 605 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 606 | return; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 607 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 608 | |
| 609 | seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); |
| 610 | newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 611 | if (newwin < seg_num) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 612 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 613 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
| 614 | return; |
| 615 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 616 | |
| 617 | spin_lock_irqsave(&agent->lock, flags); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 618 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 619 | if (!mad_send_wr) |
| 620 | goto out; /* Unmatched ACK */ |
| 621 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 622 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 623 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
| 624 | goto out; /* Send is already done */ |
| 625 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 626 | if (seg_num > mad_send_wr->send_buf.seg_count || |
| 627 | seg_num > mad_send_wr->newwin) { |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 628 | spin_unlock_irqrestore(&agent->lock, flags); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 629 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 630 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
| 631 | return; |
| 632 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 633 | |
| 634 | if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack) |
| 635 | goto out; /* Old ACK */ |
| 636 | |
| 637 | if (seg_num > mad_send_wr->last_ack) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 638 | adjust_last_ack(mad_send_wr, seg_num); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 639 | mad_send_wr->retries = mad_send_wr->send_buf.retries; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 640 | } |
| 641 | mad_send_wr->newwin = newwin; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 642 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 643 | /* If no response is expected, the ACK completes the send */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 644 | if (!mad_send_wr->send_buf.timeout_ms) { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 645 | struct ib_mad_send_wc wc; |
| 646 | |
| 647 | ib_mark_mad_done(mad_send_wr); |
| 648 | spin_unlock_irqrestore(&agent->lock, flags); |
| 649 | |
| 650 | wc.status = IB_WC_SUCCESS; |
| 651 | wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 652 | wc.send_buf = &mad_send_wr->send_buf; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 653 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
| 654 | return; |
| 655 | } |
| 656 | if (mad_send_wr->refcount == 1) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 657 | ib_reset_mad_timeout(mad_send_wr, |
| 658 | mad_send_wr->send_buf.timeout_ms); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 659 | } else if (mad_send_wr->refcount == 1 && |
| 660 | mad_send_wr->seg_num < mad_send_wr->newwin && |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 661 | mad_send_wr->seg_num < mad_send_wr->send_buf.seg_count) { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 662 | /* Send failure will just result in a timeout/retry */ |
| 663 | ret = send_next_seg(mad_send_wr); |
| 664 | if (ret) |
| 665 | goto out; |
| 666 | |
| 667 | mad_send_wr->refcount++; |
| 668 | list_del(&mad_send_wr->agent_list); |
| 669 | list_add_tail(&mad_send_wr->agent_list, |
| 670 | &mad_send_wr->mad_agent_priv->send_list); |
| 671 | } |
| 672 | out: |
| 673 | spin_unlock_irqrestore(&agent->lock, flags); |
| 674 | } |
| 675 | |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 676 | static struct ib_mad_recv_wc * |
| 677 | process_rmpp_data(struct ib_mad_agent_private *agent, |
| 678 | struct ib_mad_recv_wc *mad_recv_wc) |
| 679 | { |
| 680 | struct ib_rmpp_hdr *rmpp_hdr; |
| 681 | u8 rmpp_status; |
| 682 | |
| 683 | rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; |
| 684 | |
| 685 | if (rmpp_hdr->rmpp_status) { |
| 686 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; |
| 687 | goto bad; |
| 688 | } |
| 689 | |
| 690 | if (rmpp_hdr->seg_num == __constant_htonl(1)) { |
| 691 | if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { |
| 692 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
| 693 | goto bad; |
| 694 | } |
| 695 | return start_rmpp(agent, mad_recv_wc); |
| 696 | } else { |
| 697 | if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { |
| 698 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
| 699 | goto bad; |
| 700 | } |
| 701 | return continue_rmpp(agent, mad_recv_wc); |
| 702 | } |
| 703 | bad: |
| 704 | nack_recv(agent, mad_recv_wc, rmpp_status); |
| 705 | ib_free_recv_mad(mad_recv_wc); |
| 706 | return NULL; |
| 707 | } |
| 708 | |
| 709 | static void process_rmpp_stop(struct ib_mad_agent_private *agent, |
| 710 | struct ib_mad_recv_wc *mad_recv_wc) |
| 711 | { |
| 712 | struct ib_rmpp_mad *rmpp_mad; |
| 713 | |
| 714 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; |
| 715 | |
| 716 | if (rmpp_mad->rmpp_hdr.rmpp_status != IB_MGMT_RMPP_STATUS_RESX) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 717 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 718 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| 719 | } else |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 720 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | static void process_rmpp_abort(struct ib_mad_agent_private *agent, |
| 724 | struct ib_mad_recv_wc *mad_recv_wc) |
| 725 | { |
| 726 | struct ib_rmpp_mad *rmpp_mad; |
| 727 | |
| 728 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; |
| 729 | |
| 730 | if (rmpp_mad->rmpp_hdr.rmpp_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || |
| 731 | rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 732 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 733 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| 734 | } else |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 735 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 738 | struct ib_mad_recv_wc * |
| 739 | ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent, |
| 740 | struct ib_mad_recv_wc *mad_recv_wc) |
| 741 | { |
| 742 | struct ib_rmpp_mad *rmpp_mad; |
| 743 | |
| 744 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; |
| 745 | if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE)) |
| 746 | return mad_recv_wc; |
| 747 | |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 748 | if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 749 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 750 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 751 | goto out; |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 752 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 753 | |
| 754 | switch (rmpp_mad->rmpp_hdr.rmpp_type) { |
| 755 | case IB_MGMT_RMPP_TYPE_DATA: |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 756 | return process_rmpp_data(agent, mad_recv_wc); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 757 | case IB_MGMT_RMPP_TYPE_ACK: |
| 758 | process_rmpp_ack(agent, mad_recv_wc); |
| 759 | break; |
| 760 | case IB_MGMT_RMPP_TYPE_STOP: |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 761 | process_rmpp_stop(agent, mad_recv_wc); |
| 762 | break; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 763 | case IB_MGMT_RMPP_TYPE_ABORT: |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 764 | process_rmpp_abort(agent, mad_recv_wc); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 765 | break; |
| 766 | default: |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 767 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
Sean Hefty | fe9e08e | 2005-08-19 13:50:33 -0700 | [diff] [blame] | 768 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 769 | break; |
| 770 | } |
| 771 | out: |
| 772 | ib_free_recv_mad(mad_recv_wc); |
| 773 | return NULL; |
| 774 | } |
| 775 | |
| 776 | int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr) |
| 777 | { |
| 778 | struct ib_rmpp_mad *rmpp_mad; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 779 | int ret; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 780 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 781 | rmpp_mad = mad_send_wr->send_buf.mad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 782 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 783 | IB_MGMT_RMPP_FLAG_ACTIVE)) |
| 784 | return IB_RMPP_RESULT_UNHANDLED; |
| 785 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 786 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) { |
| 787 | mad_send_wr->seg_num = 1; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 788 | return IB_RMPP_RESULT_INTERNAL; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 789 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 790 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 791 | mad_send_wr->newwin = 1; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 792 | |
| 793 | /* We need to wait for the final ACK even if there isn't a response */ |
| 794 | mad_send_wr->refcount += (mad_send_wr->timeout == 0); |
| 795 | ret = send_next_seg(mad_send_wr); |
| 796 | if (!ret) |
| 797 | return IB_RMPP_RESULT_CONSUMED; |
| 798 | return ret; |
| 799 | } |
| 800 | |
| 801 | int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr, |
| 802 | struct ib_mad_send_wc *mad_send_wc) |
| 803 | { |
| 804 | struct ib_rmpp_mad *rmpp_mad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 805 | int ret; |
| 806 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 807 | rmpp_mad = mad_send_wr->send_buf.mad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 808 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 809 | IB_MGMT_RMPP_FLAG_ACTIVE)) |
| 810 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ |
| 811 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 812 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 813 | return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */ |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 814 | |
| 815 | if (mad_send_wc->status != IB_WC_SUCCESS || |
| 816 | mad_send_wr->status != IB_WC_SUCCESS) |
| 817 | return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */ |
| 818 | |
| 819 | if (!mad_send_wr->timeout) |
| 820 | return IB_RMPP_RESULT_PROCESSED; /* Response received */ |
| 821 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 822 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 823 | mad_send_wr->timeout = |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 824 | msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 825 | return IB_RMPP_RESULT_PROCESSED; /* Send done */ |
| 826 | } |
| 827 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 828 | if (mad_send_wr->seg_num == mad_send_wr->newwin || |
| 829 | mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 830 | return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */ |
| 831 | |
| 832 | ret = send_next_seg(mad_send_wr); |
| 833 | if (ret) { |
| 834 | mad_send_wc->status = IB_WC_GENERAL_ERR; |
| 835 | return IB_RMPP_RESULT_PROCESSED; |
| 836 | } |
| 837 | return IB_RMPP_RESULT_CONSUMED; |
| 838 | } |
| 839 | |
| 840 | int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr) |
| 841 | { |
| 842 | struct ib_rmpp_mad *rmpp_mad; |
| 843 | int ret; |
| 844 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 845 | rmpp_mad = mad_send_wr->send_buf.mad; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 846 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 847 | IB_MGMT_RMPP_FLAG_ACTIVE)) |
| 848 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ |
| 849 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 850 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 851 | return IB_RMPP_RESULT_PROCESSED; |
| 852 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 853 | mad_send_wr->seg_num = mad_send_wr->last_ack; |
| 854 | mad_send_wr->cur_seg = mad_send_wr->last_ack_seg; |
| 855 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 856 | ret = send_next_seg(mad_send_wr); |
| 857 | if (ret) |
| 858 | return IB_RMPP_RESULT_PROCESSED; |
| 859 | |
| 860 | return IB_RMPP_RESULT_CONSUMED; |
| 861 | } |