Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
| 4 | * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | * |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 34 | * $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include "mad_priv.h" |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 39 | #include "mad_rmpp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "smi.h" |
| 41 | #include "agent.h" |
| 42 | |
| 43 | MODULE_LICENSE("Dual BSD/GPL"); |
| 44 | MODULE_DESCRIPTION("kernel IB MAD API"); |
| 45 | MODULE_AUTHOR("Hal Rosenstock"); |
| 46 | MODULE_AUTHOR("Sean Hefty"); |
| 47 | |
| 48 | |
| 49 | kmem_cache_t *ib_mad_cache; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static struct list_head ib_mad_port_list; |
| 52 | static u32 ib_mad_client_id = 0; |
| 53 | |
| 54 | /* Port list lock */ |
| 55 | static spinlock_t ib_mad_port_list_lock; |
| 56 | |
| 57 | |
| 58 | /* Forward declarations */ |
| 59 | static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| 60 | struct ib_mad_reg_req *mad_reg_req); |
| 61 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); |
| 62 | static struct ib_mad_agent_private *find_mad_agent( |
| 63 | struct ib_mad_port_private *port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 64 | struct ib_mad *mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| 66 | struct ib_mad_private *mad); |
| 67 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static void timeout_sends(void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | static void local_completions(void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 71 | struct ib_mad_agent_private *agent_priv, |
| 72 | u8 mgmt_class); |
| 73 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 74 | struct ib_mad_agent_private *agent_priv); |
| 75 | |
| 76 | /* |
| 77 | * Returns a ib_mad_port_private structure or NULL for a device/port |
| 78 | * Assumes ib_mad_port_list_lock is being held |
| 79 | */ |
| 80 | static inline struct ib_mad_port_private * |
| 81 | __ib_get_mad_port(struct ib_device *device, int port_num) |
| 82 | { |
| 83 | struct ib_mad_port_private *entry; |
| 84 | |
| 85 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { |
| 86 | if (entry->device == device && entry->port_num == port_num) |
| 87 | return entry; |
| 88 | } |
| 89 | return NULL; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Wrapper function to return a ib_mad_port_private structure or NULL |
| 94 | * for a device/port |
| 95 | */ |
| 96 | static inline struct ib_mad_port_private * |
| 97 | ib_get_mad_port(struct ib_device *device, int port_num) |
| 98 | { |
| 99 | struct ib_mad_port_private *entry; |
| 100 | unsigned long flags; |
| 101 | |
| 102 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 103 | entry = __ib_get_mad_port(device, port_num); |
| 104 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 105 | |
| 106 | return entry; |
| 107 | } |
| 108 | |
| 109 | static inline u8 convert_mgmt_class(u8 mgmt_class) |
| 110 | { |
| 111 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ |
| 112 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? |
| 113 | 0 : mgmt_class; |
| 114 | } |
| 115 | |
| 116 | static int get_spl_qp_index(enum ib_qp_type qp_type) |
| 117 | { |
| 118 | switch (qp_type) |
| 119 | { |
| 120 | case IB_QPT_SMI: |
| 121 | return 0; |
| 122 | case IB_QPT_GSI: |
| 123 | return 1; |
| 124 | default: |
| 125 | return -1; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static int vendor_class_index(u8 mgmt_class) |
| 130 | { |
| 131 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; |
| 132 | } |
| 133 | |
| 134 | static int is_vendor_class(u8 mgmt_class) |
| 135 | { |
| 136 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || |
| 137 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
| 138 | return 0; |
| 139 | return 1; |
| 140 | } |
| 141 | |
| 142 | static int is_vendor_oui(char *oui) |
| 143 | { |
| 144 | if (oui[0] || oui[1] || oui[2]) |
| 145 | return 1; |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static int is_vendor_method_in_use( |
| 150 | struct ib_mad_mgmt_vendor_class *vendor_class, |
| 151 | struct ib_mad_reg_req *mad_reg_req) |
| 152 | { |
| 153 | struct ib_mad_mgmt_method_table *method; |
| 154 | int i; |
| 155 | |
| 156 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 157 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { |
| 158 | method = vendor_class->method_table[i]; |
| 159 | if (method) { |
| 160 | if (method_in_use(&method, mad_reg_req)) |
| 161 | return 1; |
| 162 | else |
| 163 | break; |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * ib_register_mad_agent - Register to send/receive MADs |
| 172 | */ |
| 173 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, |
| 174 | u8 port_num, |
| 175 | enum ib_qp_type qp_type, |
| 176 | struct ib_mad_reg_req *mad_reg_req, |
| 177 | u8 rmpp_version, |
| 178 | ib_mad_send_handler send_handler, |
| 179 | ib_mad_recv_handler recv_handler, |
| 180 | void *context) |
| 181 | { |
| 182 | struct ib_mad_port_private *port_priv; |
| 183 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); |
| 184 | struct ib_mad_agent_private *mad_agent_priv; |
| 185 | struct ib_mad_reg_req *reg_req = NULL; |
| 186 | struct ib_mad_mgmt_class_table *class; |
| 187 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 188 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 189 | struct ib_mad_mgmt_method_table *method; |
| 190 | int ret2, qpn; |
| 191 | unsigned long flags; |
| 192 | u8 mgmt_class, vclass; |
| 193 | |
| 194 | /* Validate parameters */ |
| 195 | qpn = get_spl_qp_index(qp_type); |
| 196 | if (qpn == -1) |
| 197 | goto error1; |
| 198 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 199 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
| 200 | goto error1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | /* Validate MAD registration request if supplied */ |
| 203 | if (mad_reg_req) { |
| 204 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) |
| 205 | goto error1; |
| 206 | if (!recv_handler) |
| 207 | goto error1; |
| 208 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
| 209 | /* |
| 210 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only |
| 211 | * one in this range currently allowed |
| 212 | */ |
| 213 | if (mad_reg_req->mgmt_class != |
| 214 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
| 215 | goto error1; |
| 216 | } else if (mad_reg_req->mgmt_class == 0) { |
| 217 | /* |
| 218 | * Class 0 is reserved in IBA and is used for |
| 219 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE |
| 220 | */ |
| 221 | goto error1; |
| 222 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { |
| 223 | /* |
| 224 | * If class is in "new" vendor range, |
| 225 | * ensure supplied OUI is not zero |
| 226 | */ |
| 227 | if (!is_vendor_oui(mad_reg_req->oui)) |
| 228 | goto error1; |
| 229 | } |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 230 | /* Make sure class supplied is consistent with RMPP */ |
Hal Rosenstock | 64cb9c6 | 2006-04-12 21:29:10 -0400 | [diff] [blame] | 231 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 232 | if (rmpp_version) |
| 233 | goto error1; |
| 234 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | /* Make sure class supplied is consistent with QP type */ |
| 236 | if (qp_type == IB_QPT_SMI) { |
| 237 | if ((mad_reg_req->mgmt_class != |
| 238 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && |
| 239 | (mad_reg_req->mgmt_class != |
| 240 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 241 | goto error1; |
| 242 | } else { |
| 243 | if ((mad_reg_req->mgmt_class == |
| 244 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 245 | (mad_reg_req->mgmt_class == |
| 246 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 247 | goto error1; |
| 248 | } |
| 249 | } else { |
| 250 | /* No registration request supplied */ |
| 251 | if (!send_handler) |
| 252 | goto error1; |
| 253 | } |
| 254 | |
| 255 | /* Validate device and port */ |
| 256 | port_priv = ib_get_mad_port(device, port_num); |
| 257 | if (!port_priv) { |
| 258 | ret = ERR_PTR(-ENODEV); |
| 259 | goto error1; |
| 260 | } |
| 261 | |
| 262 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 263 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | if (!mad_agent_priv) { |
| 265 | ret = ERR_PTR(-ENOMEM); |
| 266 | goto error1; |
| 267 | } |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 268 | |
| 269 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, |
| 270 | IB_ACCESS_LOCAL_WRITE); |
| 271 | if (IS_ERR(mad_agent_priv->agent.mr)) { |
| 272 | ret = ERR_PTR(-ENOMEM); |
| 273 | goto error2; |
| 274 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
| 276 | if (mad_reg_req) { |
| 277 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); |
| 278 | if (!reg_req) { |
| 279 | ret = ERR_PTR(-ENOMEM); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 280 | goto error3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | /* Make a copy of the MAD registration request */ |
| 283 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); |
| 284 | } |
| 285 | |
| 286 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
| 288 | mad_agent_priv->reg_req = reg_req; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 289 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | mad_agent_priv->agent.device = device; |
| 291 | mad_agent_priv->agent.recv_handler = recv_handler; |
| 292 | mad_agent_priv->agent.send_handler = send_handler; |
| 293 | mad_agent_priv->agent.context = context; |
| 294 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 295 | mad_agent_priv->agent.port_num = port_num; |
| 296 | |
| 297 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 298 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; |
| 299 | |
| 300 | /* |
| 301 | * Make sure MAD registration (if supplied) |
| 302 | * is non overlapping with any existing ones |
| 303 | */ |
| 304 | if (mad_reg_req) { |
| 305 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); |
| 306 | if (!is_vendor_class(mgmt_class)) { |
| 307 | class = port_priv->version[mad_reg_req-> |
| 308 | mgmt_class_version].class; |
| 309 | if (class) { |
| 310 | method = class->method_table[mgmt_class]; |
| 311 | if (method) { |
| 312 | if (method_in_use(&method, |
| 313 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 314 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, |
| 318 | mgmt_class); |
| 319 | } else { |
| 320 | /* "New" vendor class range */ |
| 321 | vendor = port_priv->version[mad_reg_req-> |
| 322 | mgmt_class_version].vendor; |
| 323 | if (vendor) { |
| 324 | vclass = vendor_class_index(mgmt_class); |
| 325 | vendor_class = vendor->vendor_class[vclass]; |
| 326 | if (vendor_class) { |
| 327 | if (is_vendor_method_in_use( |
| 328 | vendor_class, |
| 329 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 330 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | } |
| 333 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); |
| 334 | } |
| 335 | if (ret2) { |
| 336 | ret = ERR_PTR(ret2); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 337 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | } |
| 340 | |
| 341 | /* Add mad agent into port's agent list */ |
| 342 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); |
| 343 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 344 | |
| 345 | spin_lock_init(&mad_agent_priv->lock); |
| 346 | INIT_LIST_HEAD(&mad_agent_priv->send_list); |
| 347 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); |
Hal Rosenstock | 6a0c435 | 2005-07-27 11:45:26 -0700 | [diff] [blame] | 348 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 349 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv); |
| 351 | INIT_LIST_HEAD(&mad_agent_priv->local_list); |
| 352 | INIT_WORK(&mad_agent_priv->local_work, local_completions, |
| 353 | mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | atomic_set(&mad_agent_priv->refcount, 1); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 355 | init_completion(&mad_agent_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
| 357 | return &mad_agent_priv->agent; |
| 358 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 359 | error4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 361 | kfree(reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 362 | error3: |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 363 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Adrian Bunk | 2012a11 | 2005-11-27 00:37:36 +0100 | [diff] [blame] | 364 | error2: |
| 365 | kfree(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | error1: |
| 367 | return ret; |
| 368 | } |
| 369 | EXPORT_SYMBOL(ib_register_mad_agent); |
| 370 | |
| 371 | static inline int is_snooping_sends(int mad_snoop_flags) |
| 372 | { |
| 373 | return (mad_snoop_flags & |
| 374 | (/*IB_MAD_SNOOP_POSTED_SENDS | |
| 375 | IB_MAD_SNOOP_RMPP_SENDS |*/ |
| 376 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| |
| 377 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); |
| 378 | } |
| 379 | |
| 380 | static inline int is_snooping_recvs(int mad_snoop_flags) |
| 381 | { |
| 382 | return (mad_snoop_flags & |
| 383 | (IB_MAD_SNOOP_RECVS /*| |
| 384 | IB_MAD_SNOOP_RMPP_RECVS*/)); |
| 385 | } |
| 386 | |
| 387 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, |
| 388 | struct ib_mad_snoop_private *mad_snoop_priv) |
| 389 | { |
| 390 | struct ib_mad_snoop_private **new_snoop_table; |
| 391 | unsigned long flags; |
| 392 | int i; |
| 393 | |
| 394 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 395 | /* Check for empty slot in array. */ |
| 396 | for (i = 0; i < qp_info->snoop_table_size; i++) |
| 397 | if (!qp_info->snoop_table[i]) |
| 398 | break; |
| 399 | |
| 400 | if (i == qp_info->snoop_table_size) { |
| 401 | /* Grow table. */ |
| 402 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * |
| 403 | qp_info->snoop_table_size + 1, |
| 404 | GFP_ATOMIC); |
| 405 | if (!new_snoop_table) { |
| 406 | i = -ENOMEM; |
| 407 | goto out; |
| 408 | } |
| 409 | if (qp_info->snoop_table) { |
| 410 | memcpy(new_snoop_table, qp_info->snoop_table, |
| 411 | sizeof mad_snoop_priv * |
| 412 | qp_info->snoop_table_size); |
| 413 | kfree(qp_info->snoop_table); |
| 414 | } |
| 415 | qp_info->snoop_table = new_snoop_table; |
| 416 | qp_info->snoop_table_size++; |
| 417 | } |
| 418 | qp_info->snoop_table[i] = mad_snoop_priv; |
| 419 | atomic_inc(&qp_info->snoop_count); |
| 420 | out: |
| 421 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 422 | return i; |
| 423 | } |
| 424 | |
| 425 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, |
| 426 | u8 port_num, |
| 427 | enum ib_qp_type qp_type, |
| 428 | int mad_snoop_flags, |
| 429 | ib_mad_snoop_handler snoop_handler, |
| 430 | ib_mad_recv_handler recv_handler, |
| 431 | void *context) |
| 432 | { |
| 433 | struct ib_mad_port_private *port_priv; |
| 434 | struct ib_mad_agent *ret; |
| 435 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 436 | int qpn; |
| 437 | |
| 438 | /* Validate parameters */ |
| 439 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || |
| 440 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { |
| 441 | ret = ERR_PTR(-EINVAL); |
| 442 | goto error1; |
| 443 | } |
| 444 | qpn = get_spl_qp_index(qp_type); |
| 445 | if (qpn == -1) { |
| 446 | ret = ERR_PTR(-EINVAL); |
| 447 | goto error1; |
| 448 | } |
| 449 | port_priv = ib_get_mad_port(device, port_num); |
| 450 | if (!port_priv) { |
| 451 | ret = ERR_PTR(-ENODEV); |
| 452 | goto error1; |
| 453 | } |
| 454 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 455 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | if (!mad_snoop_priv) { |
| 457 | ret = ERR_PTR(-ENOMEM); |
| 458 | goto error1; |
| 459 | } |
| 460 | |
| 461 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
| 463 | mad_snoop_priv->agent.device = device; |
| 464 | mad_snoop_priv->agent.recv_handler = recv_handler; |
| 465 | mad_snoop_priv->agent.snoop_handler = snoop_handler; |
| 466 | mad_snoop_priv->agent.context = context; |
| 467 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 468 | mad_snoop_priv->agent.port_num = port_num; |
| 469 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 470 | init_completion(&mad_snoop_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | mad_snoop_priv->snoop_index = register_snoop_agent( |
| 472 | &port_priv->qp_info[qpn], |
| 473 | mad_snoop_priv); |
| 474 | if (mad_snoop_priv->snoop_index < 0) { |
| 475 | ret = ERR_PTR(mad_snoop_priv->snoop_index); |
| 476 | goto error2; |
| 477 | } |
| 478 | |
| 479 | atomic_set(&mad_snoop_priv->refcount, 1); |
| 480 | return &mad_snoop_priv->agent; |
| 481 | |
| 482 | error2: |
| 483 | kfree(mad_snoop_priv); |
| 484 | error1: |
| 485 | return ret; |
| 486 | } |
| 487 | EXPORT_SYMBOL(ib_register_mad_snoop); |
| 488 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 489 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| 490 | { |
| 491 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 492 | complete(&mad_agent_priv->comp); |
| 493 | } |
| 494 | |
| 495 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) |
| 496 | { |
| 497 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
| 498 | complete(&mad_snoop_priv->comp); |
| 499 | } |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| 502 | { |
| 503 | struct ib_mad_port_private *port_priv; |
| 504 | unsigned long flags; |
| 505 | |
| 506 | /* Note that we could still be handling received MADs */ |
| 507 | |
| 508 | /* |
| 509 | * Canceling all sends results in dropping received response |
| 510 | * MADs, preventing us from queuing additional work |
| 511 | */ |
| 512 | cancel_mads(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | port_priv = mad_agent_priv->qp_info->port_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 517 | remove_mad_reg_req(mad_agent_priv); |
| 518 | list_del(&mad_agent_priv->agent_list); |
| 519 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 520 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 521 | flush_workqueue(port_priv->wq); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 522 | ib_cancel_rmpp_recvs(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 524 | deref_mad_agent(mad_agent_priv); |
| 525 | wait_for_completion(&mad_agent_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 527 | kfree(mad_agent_priv->reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 528 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | kfree(mad_agent_priv); |
| 530 | } |
| 531 | |
| 532 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) |
| 533 | { |
| 534 | struct ib_mad_qp_info *qp_info; |
| 535 | unsigned long flags; |
| 536 | |
| 537 | qp_info = mad_snoop_priv->qp_info; |
| 538 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 539 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; |
| 540 | atomic_dec(&qp_info->snoop_count); |
| 541 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 542 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 543 | deref_snoop_agent(mad_snoop_priv); |
| 544 | wait_for_completion(&mad_snoop_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
| 546 | kfree(mad_snoop_priv); |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * ib_unregister_mad_agent - Unregisters a client from using MAD services |
| 551 | */ |
| 552 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
| 553 | { |
| 554 | struct ib_mad_agent_private *mad_agent_priv; |
| 555 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 556 | |
| 557 | /* If the TID is zero, the agent can only snoop. */ |
| 558 | if (mad_agent->hi_tid) { |
| 559 | mad_agent_priv = container_of(mad_agent, |
| 560 | struct ib_mad_agent_private, |
| 561 | agent); |
| 562 | unregister_mad_agent(mad_agent_priv); |
| 563 | } else { |
| 564 | mad_snoop_priv = container_of(mad_agent, |
| 565 | struct ib_mad_snoop_private, |
| 566 | agent); |
| 567 | unregister_mad_snoop(mad_snoop_priv); |
| 568 | } |
| 569 | return 0; |
| 570 | } |
| 571 | EXPORT_SYMBOL(ib_unregister_mad_agent); |
| 572 | |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 573 | static inline int response_mad(struct ib_mad *mad) |
| 574 | { |
| 575 | /* Trap represses are responses although response bit is reset */ |
| 576 | return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || |
| 577 | (mad->mad_hdr.method & IB_MGMT_METHOD_RESP)); |
| 578 | } |
| 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
| 581 | { |
| 582 | struct ib_mad_queue *mad_queue; |
| 583 | unsigned long flags; |
| 584 | |
| 585 | BUG_ON(!mad_list->mad_queue); |
| 586 | mad_queue = mad_list->mad_queue; |
| 587 | spin_lock_irqsave(&mad_queue->lock, flags); |
| 588 | list_del(&mad_list->list); |
| 589 | mad_queue->count--; |
| 590 | spin_unlock_irqrestore(&mad_queue->lock, flags); |
| 591 | } |
| 592 | |
| 593 | static void snoop_send(struct ib_mad_qp_info *qp_info, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 594 | struct ib_mad_send_buf *send_buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | struct ib_mad_send_wc *mad_send_wc, |
| 596 | int mad_snoop_flags) |
| 597 | { |
| 598 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 599 | unsigned long flags; |
| 600 | int i; |
| 601 | |
| 602 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 603 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 604 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 605 | if (!mad_snoop_priv || |
| 606 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 607 | continue; |
| 608 | |
| 609 | atomic_inc(&mad_snoop_priv->refcount); |
| 610 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 611 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 612 | send_buf, mad_send_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 613 | deref_snoop_agent(mad_snoop_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 615 | } |
| 616 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 617 | } |
| 618 | |
| 619 | static void snoop_recv(struct ib_mad_qp_info *qp_info, |
| 620 | struct ib_mad_recv_wc *mad_recv_wc, |
| 621 | int mad_snoop_flags) |
| 622 | { |
| 623 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 624 | unsigned long flags; |
| 625 | int i; |
| 626 | |
| 627 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 628 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 629 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 630 | if (!mad_snoop_priv || |
| 631 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 632 | continue; |
| 633 | |
| 634 | atomic_inc(&mad_snoop_priv->refcount); |
| 635 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 636 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, |
| 637 | mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 638 | deref_snoop_agent(mad_snoop_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 640 | } |
| 641 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 642 | } |
| 643 | |
| 644 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, |
| 645 | struct ib_wc *wc) |
| 646 | { |
| 647 | memset(wc, 0, sizeof *wc); |
| 648 | wc->wr_id = wr_id; |
| 649 | wc->status = IB_WC_SUCCESS; |
| 650 | wc->opcode = IB_WC_RECV; |
| 651 | wc->pkey_index = pkey_index; |
| 652 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); |
| 653 | wc->src_qp = IB_QP0; |
| 654 | wc->qp_num = IB_QP0; |
| 655 | wc->slid = slid; |
| 656 | wc->sl = 0; |
| 657 | wc->dlid_path_bits = 0; |
| 658 | wc->port_num = port_num; |
| 659 | } |
| 660 | |
| 661 | /* |
| 662 | * Return 0 if SMP is to be sent |
| 663 | * Return 1 if SMP was consumed locally (whether or not solicited) |
| 664 | * Return < 0 if error |
| 665 | */ |
| 666 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 667 | struct ib_mad_send_wr_private *mad_send_wr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 669 | int ret; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 670 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | unsigned long flags; |
| 672 | struct ib_mad_local_private *local; |
| 673 | struct ib_mad_private *mad_priv; |
| 674 | struct ib_mad_port_private *port_priv; |
| 675 | struct ib_mad_agent_private *recv_mad_agent = NULL; |
| 676 | struct ib_device *device = mad_agent_priv->agent.device; |
| 677 | u8 port_num = mad_agent_priv->agent.port_num; |
| 678 | struct ib_wc mad_wc; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 679 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Ralph Campbell | 8cf3f04 | 2006-02-03 14:28:48 -0800 | [diff] [blame] | 681 | /* |
| 682 | * Directed route handling starts if the initial LID routed part of |
| 683 | * a request or the ending LID routed part of a response is empty. |
| 684 | * If we are at the start of the LID routed part, don't update the |
| 685 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. |
| 686 | */ |
| 687 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == |
| 688 | IB_LID_PERMISSIVE && |
| 689 | !smi_handle_dr_smp_send(smp, device->node_type, port_num)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | ret = -EINVAL; |
| 691 | printk(KERN_ERR PFX "Invalid directed route\n"); |
| 692 | goto out; |
| 693 | } |
| 694 | /* Check to post send on QP or process locally */ |
Ralph Campbell | 5e9f71a | 2006-02-03 14:32:01 -0800 | [diff] [blame] | 695 | ret = smi_check_local_smp(smp, device); |
| 696 | if (!ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | goto out; |
| 698 | |
| 699 | local = kmalloc(sizeof *local, GFP_ATOMIC); |
| 700 | if (!local) { |
| 701 | ret = -ENOMEM; |
| 702 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); |
| 703 | goto out; |
| 704 | } |
| 705 | local->mad_priv = NULL; |
| 706 | local->recv_mad_agent = NULL; |
| 707 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); |
| 708 | if (!mad_priv) { |
| 709 | ret = -ENOMEM; |
| 710 | printk(KERN_ERR PFX "No memory for local response MAD\n"); |
| 711 | kfree(local); |
| 712 | goto out; |
| 713 | } |
| 714 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 715 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
| 716 | send_wr->wr.ud.pkey_index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | send_wr->wr.ud.port_num, &mad_wc); |
| 718 | |
| 719 | /* No GRH for DR SMP */ |
| 720 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, |
| 721 | (struct ib_mad *)smp, |
| 722 | (struct ib_mad *)&mad_priv->mad); |
| 723 | switch (ret) |
| 724 | { |
| 725 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 726 | if (response_mad(&mad_priv->mad.mad) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | mad_agent_priv->agent.recv_handler) { |
| 728 | local->mad_priv = mad_priv; |
| 729 | local->recv_mad_agent = mad_agent_priv; |
| 730 | /* |
| 731 | * Reference MAD agent until receive |
| 732 | * side of local completion handled |
| 733 | */ |
| 734 | atomic_inc(&mad_agent_priv->refcount); |
| 735 | } else |
| 736 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 737 | break; |
| 738 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: |
| 739 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 740 | break; |
| 741 | case IB_MAD_RESULT_SUCCESS: |
| 742 | /* Treat like an incoming receive MAD */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
| 744 | mad_agent_priv->agent.port_num); |
| 745 | if (port_priv) { |
| 746 | mad_priv->mad.mad.mad_hdr.tid = |
| 747 | ((struct ib_mad *)smp)->mad_hdr.tid; |
| 748 | recv_mad_agent = find_mad_agent(port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 749 | &mad_priv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
| 751 | if (!port_priv || !recv_mad_agent) { |
| 752 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 753 | kfree(local); |
| 754 | ret = 0; |
| 755 | goto out; |
| 756 | } |
| 757 | local->mad_priv = mad_priv; |
| 758 | local->recv_mad_agent = recv_mad_agent; |
| 759 | break; |
| 760 | default: |
| 761 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 762 | kfree(local); |
| 763 | ret = -EINVAL; |
| 764 | goto out; |
| 765 | } |
| 766 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 767 | local->mad_send_wr = mad_send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | /* Reference MAD agent until send side of local completion handled */ |
| 769 | atomic_inc(&mad_agent_priv->refcount); |
| 770 | /* Queue local completion to local list */ |
| 771 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 772 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); |
| 773 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 774 | queue_work(mad_agent_priv->qp_info->port_priv->wq, |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 775 | &mad_agent_priv->local_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | ret = 1; |
| 777 | out: |
| 778 | return ret; |
| 779 | } |
| 780 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 781 | static int get_pad_size(int hdr_len, int data_len) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 782 | { |
| 783 | int seg_size, pad; |
| 784 | |
| 785 | seg_size = sizeof(struct ib_mad) - hdr_len; |
| 786 | if (data_len && seg_size) { |
| 787 | pad = seg_size - data_len % seg_size; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 788 | return pad == seg_size ? 0 : pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 789 | } else |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 790 | return seg_size; |
| 791 | } |
| 792 | |
| 793 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) |
| 794 | { |
| 795 | struct ib_rmpp_segment *s, *t; |
| 796 | |
| 797 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { |
| 798 | list_del(&s->list); |
| 799 | kfree(s); |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, |
| 804 | gfp_t gfp_mask) |
| 805 | { |
| 806 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; |
| 807 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; |
| 808 | struct ib_rmpp_segment *seg = NULL; |
| 809 | int left, seg_size, pad; |
| 810 | |
| 811 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; |
| 812 | seg_size = send_buf->seg_size; |
| 813 | pad = send_wr->pad; |
| 814 | |
| 815 | /* Allocate data segments. */ |
| 816 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { |
| 817 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); |
| 818 | if (!seg) { |
| 819 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " |
| 820 | "alloc failed for len %zd, gfp %#x\n", |
| 821 | sizeof (*seg) + seg_size, gfp_mask); |
| 822 | free_send_rmpp_list(send_wr); |
| 823 | return -ENOMEM; |
| 824 | } |
| 825 | seg->num = ++send_buf->seg_count; |
| 826 | list_add_tail(&seg->list, &send_wr->rmpp_list); |
| 827 | } |
| 828 | |
| 829 | /* Zero any padding */ |
| 830 | if (pad) |
| 831 | memset(seg->data + seg_size - pad, 0, pad); |
| 832 | |
| 833 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> |
| 834 | agent.rmpp_version; |
| 835 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; |
| 836 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| 837 | |
| 838 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, |
| 839 | struct ib_rmpp_segment, list); |
| 840 | send_wr->last_ack_seg = send_wr->cur_seg; |
| 841 | return 0; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
| 845 | u32 remote_qpn, u16 pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 846 | int rmpp_active, |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 847 | int hdr_len, int data_len, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 848 | gfp_t gfp_mask) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 849 | { |
| 850 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 851 | struct ib_mad_send_wr_private *mad_send_wr; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 852 | int pad, message_size, ret, size; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 853 | void *buf; |
| 854 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 855 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 856 | agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 857 | pad = get_pad_size(hdr_len, data_len); |
| 858 | message_size = hdr_len + data_len + pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 859 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 860 | if ((!mad_agent->rmpp_version && |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 861 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
| 862 | (!rmpp_active && message_size > sizeof(struct ib_mad))) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 863 | return ERR_PTR(-EINVAL); |
| 864 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 865 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
| 866 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 867 | if (!buf) |
| 868 | return ERR_PTR(-ENOMEM); |
| 869 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 870 | mad_send_wr = buf + size; |
| 871 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 872 | mad_send_wr->send_buf.mad = buf; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 873 | mad_send_wr->send_buf.hdr_len = hdr_len; |
| 874 | mad_send_wr->send_buf.data_len = data_len; |
| 875 | mad_send_wr->pad = pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 876 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 877 | mad_send_wr->mad_agent_priv = mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 878 | mad_send_wr->sg_list[0].length = hdr_len; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 879 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 880 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
| 881 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 882 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 883 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; |
| 884 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 885 | mad_send_wr->send_wr.num_sge = 2; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 886 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
| 887 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; |
| 888 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; |
| 889 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; |
| 890 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 891 | |
| 892 | if (rmpp_active) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 893 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
| 894 | if (ret) { |
| 895 | kfree(buf); |
| 896 | return ERR_PTR(ret); |
| 897 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 898 | } |
| 899 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 900 | mad_send_wr->send_buf.mad_agent = mad_agent; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 901 | atomic_inc(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 902 | return &mad_send_wr->send_buf; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 903 | } |
| 904 | EXPORT_SYMBOL(ib_create_send_mad); |
| 905 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 906 | int ib_get_mad_data_offset(u8 mgmt_class) |
| 907 | { |
| 908 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) |
| 909 | return IB_MGMT_SA_HDR; |
| 910 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
| 911 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
| 912 | (mgmt_class == IB_MGMT_CLASS_BIS)) |
| 913 | return IB_MGMT_DEVICE_HDR; |
| 914 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
| 915 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
| 916 | return IB_MGMT_VENDOR_HDR; |
| 917 | else |
| 918 | return IB_MGMT_MAD_HDR; |
| 919 | } |
| 920 | EXPORT_SYMBOL(ib_get_mad_data_offset); |
| 921 | |
| 922 | int ib_is_mad_class_rmpp(u8 mgmt_class) |
| 923 | { |
| 924 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || |
| 925 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
| 926 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
| 927 | (mgmt_class == IB_MGMT_CLASS_BIS) || |
| 928 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
| 929 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) |
| 930 | return 1; |
| 931 | return 0; |
| 932 | } |
| 933 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); |
| 934 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 935 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
| 936 | { |
| 937 | struct ib_mad_send_wr_private *mad_send_wr; |
| 938 | struct list_head *list; |
| 939 | |
| 940 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 941 | send_buf); |
| 942 | list = &mad_send_wr->cur_seg->list; |
| 943 | |
| 944 | if (mad_send_wr->cur_seg->num < seg_num) { |
| 945 | list_for_each_entry(mad_send_wr->cur_seg, list, list) |
| 946 | if (mad_send_wr->cur_seg->num == seg_num) |
| 947 | break; |
| 948 | } else if (mad_send_wr->cur_seg->num > seg_num) { |
| 949 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) |
| 950 | if (mad_send_wr->cur_seg->num == seg_num) |
| 951 | break; |
| 952 | } |
| 953 | return mad_send_wr->cur_seg->data; |
| 954 | } |
| 955 | EXPORT_SYMBOL(ib_get_rmpp_segment); |
| 956 | |
| 957 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) |
| 958 | { |
| 959 | if (mad_send_wr->send_buf.seg_count) |
| 960 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, |
| 961 | mad_send_wr->seg_num); |
| 962 | else |
| 963 | return mad_send_wr->send_buf.mad + |
| 964 | mad_send_wr->send_buf.hdr_len; |
| 965 | } |
| 966 | |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 967 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
| 968 | { |
| 969 | struct ib_mad_agent_private *mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 970 | struct ib_mad_send_wr_private *mad_send_wr; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 971 | |
| 972 | mad_agent_priv = container_of(send_buf->mad_agent, |
| 973 | struct ib_mad_agent_private, agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 974 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 975 | send_buf); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 976 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 977 | free_send_rmpp_list(mad_send_wr); |
| 978 | kfree(send_buf->mad); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 979 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 980 | } |
| 981 | EXPORT_SYMBOL(ib_free_send_mad); |
| 982 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 983 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | { |
| 985 | struct ib_mad_qp_info *qp_info; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 986 | struct list_head *list; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 987 | struct ib_send_wr *bad_send_wr; |
| 988 | struct ib_mad_agent *mad_agent; |
| 989 | struct ib_sge *sge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | unsigned long flags; |
| 991 | int ret; |
| 992 | |
Hal Rosenstock | f8197a4 | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 993 | /* Set WR ID to find mad_send_wr upon completion */ |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 994 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
| 996 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
| 997 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 998 | mad_agent = mad_send_wr->send_buf.mad_agent; |
| 999 | sge = mad_send_wr->sg_list; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1000 | sge[0].addr = dma_map_single(mad_agent->device->dma_device, |
| 1001 | mad_send_wr->send_buf.mad, |
| 1002 | sge[0].length, |
| 1003 | DMA_TO_DEVICE); |
| 1004 | pci_unmap_addr_set(mad_send_wr, header_mapping, sge[0].addr); |
| 1005 | |
| 1006 | sge[1].addr = dma_map_single(mad_agent->device->dma_device, |
| 1007 | ib_get_payload(mad_send_wr), |
| 1008 | sge[1].length, |
| 1009 | DMA_TO_DEVICE); |
| 1010 | pci_unmap_addr_set(mad_send_wr, payload_mapping, sge[1].addr); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1013 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1014 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
| 1015 | &bad_send_wr); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1016 | list = &qp_info->send_queue.list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | ret = 0; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1019 | list = &qp_info->overflow_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1021 | |
| 1022 | if (!ret) { |
| 1023 | qp_info->send_queue.count++; |
| 1024 | list_add_tail(&mad_send_wr->mad_list.list, list); |
| 1025 | } |
| 1026 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1027 | if (ret) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1028 | dma_unmap_single(mad_agent->device->dma_device, |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1029 | pci_unmap_addr(mad_send_wr, header_mapping), |
| 1030 | sge[0].length, DMA_TO_DEVICE); |
| 1031 | dma_unmap_single(mad_agent->device->dma_device, |
| 1032 | pci_unmap_addr(mad_send_wr, payload_mapping), |
| 1033 | sge[1].length, DMA_TO_DEVICE); |
| 1034 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | return ret; |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated |
| 1040 | * with the registered client |
| 1041 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1042 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
| 1043 | struct ib_mad_send_buf **bad_send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1046 | struct ib_mad_send_buf *next_send_buf; |
| 1047 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1048 | unsigned long flags; |
| 1049 | int ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
| 1051 | /* Walk list of send WRs and post each on send list */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1052 | for (; send_buf; send_buf = next_send_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1054 | mad_send_wr = container_of(send_buf, |
| 1055 | struct ib_mad_send_wr_private, |
| 1056 | send_buf); |
| 1057 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1059 | if (!send_buf->mad_agent->send_handler || |
| 1060 | (send_buf->timeout_ms && |
| 1061 | !send_buf->mad_agent->recv_handler)) { |
| 1062 | ret = -EINVAL; |
| 1063 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 1066 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
| 1067 | if (mad_agent_priv->agent.rmpp_version) { |
| 1068 | ret = -EINVAL; |
| 1069 | goto error; |
| 1070 | } |
| 1071 | } |
| 1072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | /* |
| 1074 | * Save pointer to next work request to post in case the |
| 1075 | * current one completes, and the user modifies the work |
| 1076 | * request associated with the completion |
| 1077 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1078 | next_send_buf = send_buf->next; |
| 1079 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1081 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
| 1082 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| 1083 | ret = handle_outgoing_dr_smp(mad_agent_priv, |
| 1084 | mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | if (ret < 0) /* error */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1086 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | else if (ret == 1) /* locally consumed */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1088 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
| 1090 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1091 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | /* Timeout will be updated after send completes */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1093 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
| 1094 | mad_send_wr->retries = send_buf->retries; |
| 1095 | /* Reference for work request to QP + response */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
| 1097 | mad_send_wr->status = IB_WC_SUCCESS; |
| 1098 | |
| 1099 | /* Reference MAD agent until send completes */ |
| 1100 | atomic_inc(&mad_agent_priv->refcount); |
| 1101 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1102 | list_add_tail(&mad_send_wr->agent_list, |
| 1103 | &mad_agent_priv->send_list); |
| 1104 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1105 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1106 | if (mad_agent_priv->agent.rmpp_version) { |
| 1107 | ret = ib_send_rmpp_mad(mad_send_wr); |
| 1108 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) |
| 1109 | ret = ib_send_mad(mad_send_wr); |
| 1110 | } else |
| 1111 | ret = ib_send_mad(mad_send_wr); |
| 1112 | if (ret < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | /* Fail send request */ |
| 1114 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1115 | list_del(&mad_send_wr->agent_list); |
| 1116 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1117 | atomic_dec(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1118 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 1121 | return 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1122 | error: |
| 1123 | if (bad_send_buf) |
| 1124 | *bad_send_buf = send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | return ret; |
| 1126 | } |
| 1127 | EXPORT_SYMBOL(ib_post_send_mad); |
| 1128 | |
| 1129 | /* |
| 1130 | * ib_free_recv_mad - Returns data buffers used to receive |
| 1131 | * a MAD to the access layer |
| 1132 | */ |
| 1133 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) |
| 1134 | { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1135 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | struct ib_mad_private_header *mad_priv_hdr; |
| 1137 | struct ib_mad_private *priv; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1138 | struct list_head free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1140 | INIT_LIST_HEAD(&free_list); |
| 1141 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1143 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
| 1144 | &free_list, list) { |
| 1145 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, |
| 1146 | recv_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | mad_priv_hdr = container_of(mad_recv_wc, |
| 1148 | struct ib_mad_private_header, |
| 1149 | recv_wc); |
| 1150 | priv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 1151 | header); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1152 | kmem_cache_free(ib_mad_cache, priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | } |
| 1155 | EXPORT_SYMBOL(ib_free_recv_mad); |
| 1156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
| 1158 | u8 rmpp_version, |
| 1159 | ib_mad_send_handler send_handler, |
| 1160 | ib_mad_recv_handler recv_handler, |
| 1161 | void *context) |
| 1162 | { |
| 1163 | return ERR_PTR(-EINVAL); /* XXX: for now */ |
| 1164 | } |
| 1165 | EXPORT_SYMBOL(ib_redirect_mad_qp); |
| 1166 | |
| 1167 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, |
| 1168 | struct ib_wc *wc) |
| 1169 | { |
| 1170 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); |
| 1171 | return 0; |
| 1172 | } |
| 1173 | EXPORT_SYMBOL(ib_process_mad_wc); |
| 1174 | |
| 1175 | static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| 1176 | struct ib_mad_reg_req *mad_reg_req) |
| 1177 | { |
| 1178 | int i; |
| 1179 | |
| 1180 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); |
| 1181 | i < IB_MGMT_MAX_METHODS; |
| 1182 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1183 | 1+i)) { |
| 1184 | if ((*method)->agent[i]) { |
| 1185 | printk(KERN_ERR PFX "Method %d already in use\n", i); |
| 1186 | return -EINVAL; |
| 1187 | } |
| 1188 | } |
| 1189 | return 0; |
| 1190 | } |
| 1191 | |
| 1192 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) |
| 1193 | { |
| 1194 | /* Allocate management method table */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1195 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | if (!*method) { |
| 1197 | printk(KERN_ERR PFX "No memory for " |
| 1198 | "ib_mad_mgmt_method_table\n"); |
| 1199 | return -ENOMEM; |
| 1200 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
| 1202 | return 0; |
| 1203 | } |
| 1204 | |
| 1205 | /* |
| 1206 | * Check to see if there are any methods still in use |
| 1207 | */ |
| 1208 | static int check_method_table(struct ib_mad_mgmt_method_table *method) |
| 1209 | { |
| 1210 | int i; |
| 1211 | |
| 1212 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) |
| 1213 | if (method->agent[i]) |
| 1214 | return 1; |
| 1215 | return 0; |
| 1216 | } |
| 1217 | |
| 1218 | /* |
| 1219 | * Check to see if there are any method tables for this class still in use |
| 1220 | */ |
| 1221 | static int check_class_table(struct ib_mad_mgmt_class_table *class) |
| 1222 | { |
| 1223 | int i; |
| 1224 | |
| 1225 | for (i = 0; i < MAX_MGMT_CLASS; i++) |
| 1226 | if (class->method_table[i]) |
| 1227 | return 1; |
| 1228 | return 0; |
| 1229 | } |
| 1230 | |
| 1231 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) |
| 1232 | { |
| 1233 | int i; |
| 1234 | |
| 1235 | for (i = 0; i < MAX_MGMT_OUI; i++) |
| 1236 | if (vendor_class->method_table[i]) |
| 1237 | return 1; |
| 1238 | return 0; |
| 1239 | } |
| 1240 | |
| 1241 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, |
| 1242 | char *oui) |
| 1243 | { |
| 1244 | int i; |
| 1245 | |
| 1246 | for (i = 0; i < MAX_MGMT_OUI; i++) |
| 1247 | /* Is there matching OUI for this vendor class ? */ |
| 1248 | if (!memcmp(vendor_class->oui[i], oui, 3)) |
| 1249 | return i; |
| 1250 | |
| 1251 | return -1; |
| 1252 | } |
| 1253 | |
| 1254 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) |
| 1255 | { |
| 1256 | int i; |
| 1257 | |
| 1258 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) |
| 1259 | if (vendor->vendor_class[i]) |
| 1260 | return 1; |
| 1261 | |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
| 1265 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, |
| 1266 | struct ib_mad_agent_private *agent) |
| 1267 | { |
| 1268 | int i; |
| 1269 | |
| 1270 | /* Remove any methods for this mad agent */ |
| 1271 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { |
| 1272 | if (method->agent[i] == agent) { |
| 1273 | method->agent[i] = NULL; |
| 1274 | } |
| 1275 | } |
| 1276 | } |
| 1277 | |
| 1278 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1279 | struct ib_mad_agent_private *agent_priv, |
| 1280 | u8 mgmt_class) |
| 1281 | { |
| 1282 | struct ib_mad_port_private *port_priv; |
| 1283 | struct ib_mad_mgmt_class_table **class; |
| 1284 | struct ib_mad_mgmt_method_table **method; |
| 1285 | int i, ret; |
| 1286 | |
| 1287 | port_priv = agent_priv->qp_info->port_priv; |
| 1288 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; |
| 1289 | if (!*class) { |
| 1290 | /* Allocate management class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1291 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | if (!*class) { |
| 1293 | printk(KERN_ERR PFX "No memory for " |
| 1294 | "ib_mad_mgmt_class_table\n"); |
| 1295 | ret = -ENOMEM; |
| 1296 | goto error1; |
| 1297 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | /* Allocate method table for this management class */ |
| 1300 | method = &(*class)->method_table[mgmt_class]; |
| 1301 | if ((ret = allocate_method_table(method))) |
| 1302 | goto error2; |
| 1303 | } else { |
| 1304 | method = &(*class)->method_table[mgmt_class]; |
| 1305 | if (!*method) { |
| 1306 | /* Allocate method table for this management class */ |
| 1307 | if ((ret = allocate_method_table(method))) |
| 1308 | goto error1; |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | /* Now, make sure methods are not already in use */ |
| 1313 | if (method_in_use(method, mad_reg_req)) |
| 1314 | goto error3; |
| 1315 | |
| 1316 | /* Finally, add in methods being registered */ |
| 1317 | for (i = find_first_bit(mad_reg_req->method_mask, |
| 1318 | IB_MGMT_MAX_METHODS); |
| 1319 | i < IB_MGMT_MAX_METHODS; |
| 1320 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1321 | 1+i)) { |
| 1322 | (*method)->agent[i] = agent_priv; |
| 1323 | } |
| 1324 | return 0; |
| 1325 | |
| 1326 | error3: |
| 1327 | /* Remove any methods for this mad agent */ |
| 1328 | remove_methods_mad_agent(*method, agent_priv); |
| 1329 | /* Now, check to see if there are any methods in use */ |
| 1330 | if (!check_method_table(*method)) { |
| 1331 | /* If not, release management method table */ |
| 1332 | kfree(*method); |
| 1333 | *method = NULL; |
| 1334 | } |
| 1335 | ret = -EINVAL; |
| 1336 | goto error1; |
| 1337 | error2: |
| 1338 | kfree(*class); |
| 1339 | *class = NULL; |
| 1340 | error1: |
| 1341 | return ret; |
| 1342 | } |
| 1343 | |
| 1344 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1345 | struct ib_mad_agent_private *agent_priv) |
| 1346 | { |
| 1347 | struct ib_mad_port_private *port_priv; |
| 1348 | struct ib_mad_mgmt_vendor_class_table **vendor_table; |
| 1349 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; |
| 1350 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; |
| 1351 | struct ib_mad_mgmt_method_table **method; |
| 1352 | int i, ret = -ENOMEM; |
| 1353 | u8 vclass; |
| 1354 | |
| 1355 | /* "New" vendor (with OUI) class */ |
| 1356 | vclass = vendor_class_index(mad_reg_req->mgmt_class); |
| 1357 | port_priv = agent_priv->qp_info->port_priv; |
| 1358 | vendor_table = &port_priv->version[ |
| 1359 | mad_reg_req->mgmt_class_version].vendor; |
| 1360 | if (!*vendor_table) { |
| 1361 | /* Allocate mgmt vendor class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1362 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | if (!vendor) { |
| 1364 | printk(KERN_ERR PFX "No memory for " |
| 1365 | "ib_mad_mgmt_vendor_class_table\n"); |
| 1366 | goto error1; |
| 1367 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | *vendor_table = vendor; |
| 1370 | } |
| 1371 | if (!(*vendor_table)->vendor_class[vclass]) { |
| 1372 | /* Allocate table for this management vendor class */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1373 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | if (!vendor_class) { |
| 1375 | printk(KERN_ERR PFX "No memory for " |
| 1376 | "ib_mad_mgmt_vendor_class\n"); |
| 1377 | goto error2; |
| 1378 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
| 1381 | } |
| 1382 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1383 | /* Is there matching OUI for this vendor class ? */ |
| 1384 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1385 | mad_reg_req->oui, 3)) { |
| 1386 | method = &(*vendor_table)->vendor_class[ |
| 1387 | vclass]->method_table[i]; |
| 1388 | BUG_ON(!*method); |
| 1389 | goto check_in_use; |
| 1390 | } |
| 1391 | } |
| 1392 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1393 | /* OUI slot available ? */ |
| 1394 | if (!is_vendor_oui((*vendor_table)->vendor_class[ |
| 1395 | vclass]->oui[i])) { |
| 1396 | method = &(*vendor_table)->vendor_class[ |
| 1397 | vclass]->method_table[i]; |
| 1398 | BUG_ON(*method); |
| 1399 | /* Allocate method table for this OUI */ |
| 1400 | if ((ret = allocate_method_table(method))) |
| 1401 | goto error3; |
| 1402 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1403 | mad_reg_req->oui, 3); |
| 1404 | goto check_in_use; |
| 1405 | } |
| 1406 | } |
| 1407 | printk(KERN_ERR PFX "All OUI slots in use\n"); |
| 1408 | goto error3; |
| 1409 | |
| 1410 | check_in_use: |
| 1411 | /* Now, make sure methods are not already in use */ |
| 1412 | if (method_in_use(method, mad_reg_req)) |
| 1413 | goto error4; |
| 1414 | |
| 1415 | /* Finally, add in methods being registered */ |
| 1416 | for (i = find_first_bit(mad_reg_req->method_mask, |
| 1417 | IB_MGMT_MAX_METHODS); |
| 1418 | i < IB_MGMT_MAX_METHODS; |
| 1419 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1420 | 1+i)) { |
| 1421 | (*method)->agent[i] = agent_priv; |
| 1422 | } |
| 1423 | return 0; |
| 1424 | |
| 1425 | error4: |
| 1426 | /* Remove any methods for this mad agent */ |
| 1427 | remove_methods_mad_agent(*method, agent_priv); |
| 1428 | /* Now, check to see if there are any methods in use */ |
| 1429 | if (!check_method_table(*method)) { |
| 1430 | /* If not, release management method table */ |
| 1431 | kfree(*method); |
| 1432 | *method = NULL; |
| 1433 | } |
| 1434 | ret = -EINVAL; |
| 1435 | error3: |
| 1436 | if (vendor_class) { |
| 1437 | (*vendor_table)->vendor_class[vclass] = NULL; |
| 1438 | kfree(vendor_class); |
| 1439 | } |
| 1440 | error2: |
| 1441 | if (vendor) { |
| 1442 | *vendor_table = NULL; |
| 1443 | kfree(vendor); |
| 1444 | } |
| 1445 | error1: |
| 1446 | return ret; |
| 1447 | } |
| 1448 | |
| 1449 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) |
| 1450 | { |
| 1451 | struct ib_mad_port_private *port_priv; |
| 1452 | struct ib_mad_mgmt_class_table *class; |
| 1453 | struct ib_mad_mgmt_method_table *method; |
| 1454 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1455 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1456 | int index; |
| 1457 | u8 mgmt_class; |
| 1458 | |
| 1459 | /* |
| 1460 | * Was MAD registration request supplied |
| 1461 | * with original registration ? |
| 1462 | */ |
| 1463 | if (!agent_priv->reg_req) { |
| 1464 | goto out; |
| 1465 | } |
| 1466 | |
| 1467 | port_priv = agent_priv->qp_info->port_priv; |
| 1468 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); |
| 1469 | class = port_priv->version[ |
| 1470 | agent_priv->reg_req->mgmt_class_version].class; |
| 1471 | if (!class) |
| 1472 | goto vendor_check; |
| 1473 | |
| 1474 | method = class->method_table[mgmt_class]; |
| 1475 | if (method) { |
| 1476 | /* Remove any methods for this mad agent */ |
| 1477 | remove_methods_mad_agent(method, agent_priv); |
| 1478 | /* Now, check to see if there are any methods still in use */ |
| 1479 | if (!check_method_table(method)) { |
| 1480 | /* If not, release management method table */ |
| 1481 | kfree(method); |
| 1482 | class->method_table[mgmt_class] = NULL; |
| 1483 | /* Any management classes left ? */ |
| 1484 | if (!check_class_table(class)) { |
| 1485 | /* If not, release management class table */ |
| 1486 | kfree(class); |
| 1487 | port_priv->version[ |
| 1488 | agent_priv->reg_req-> |
| 1489 | mgmt_class_version].class = NULL; |
| 1490 | } |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | vendor_check: |
| 1495 | if (!is_vendor_class(mgmt_class)) |
| 1496 | goto out; |
| 1497 | |
| 1498 | /* normalize mgmt_class to vendor range 2 */ |
| 1499 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); |
| 1500 | vendor = port_priv->version[ |
| 1501 | agent_priv->reg_req->mgmt_class_version].vendor; |
| 1502 | |
| 1503 | if (!vendor) |
| 1504 | goto out; |
| 1505 | |
| 1506 | vendor_class = vendor->vendor_class[mgmt_class]; |
| 1507 | if (vendor_class) { |
| 1508 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); |
| 1509 | if (index < 0) |
| 1510 | goto out; |
| 1511 | method = vendor_class->method_table[index]; |
| 1512 | if (method) { |
| 1513 | /* Remove any methods for this mad agent */ |
| 1514 | remove_methods_mad_agent(method, agent_priv); |
| 1515 | /* |
| 1516 | * Now, check to see if there are |
| 1517 | * any methods still in use |
| 1518 | */ |
| 1519 | if (!check_method_table(method)) { |
| 1520 | /* If not, release management method table */ |
| 1521 | kfree(method); |
| 1522 | vendor_class->method_table[index] = NULL; |
| 1523 | memset(vendor_class->oui[index], 0, 3); |
| 1524 | /* Any OUIs left ? */ |
| 1525 | if (!check_vendor_class(vendor_class)) { |
| 1526 | /* If not, release vendor class table */ |
| 1527 | kfree(vendor_class); |
| 1528 | vendor->vendor_class[mgmt_class] = NULL; |
| 1529 | /* Any other vendor classes left ? */ |
| 1530 | if (!check_vendor_table(vendor)) { |
| 1531 | kfree(vendor); |
| 1532 | port_priv->version[ |
| 1533 | agent_priv->reg_req-> |
| 1534 | mgmt_class_version]. |
| 1535 | vendor = NULL; |
| 1536 | } |
| 1537 | } |
| 1538 | } |
| 1539 | } |
| 1540 | } |
| 1541 | |
| 1542 | out: |
| 1543 | return; |
| 1544 | } |
| 1545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | static struct ib_mad_agent_private * |
| 1547 | find_mad_agent(struct ib_mad_port_private *port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1548 | struct ib_mad *mad) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | { |
| 1550 | struct ib_mad_agent_private *mad_agent = NULL; |
| 1551 | unsigned long flags; |
| 1552 | |
| 1553 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1554 | if (response_mad(mad)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | u32 hi_tid; |
| 1556 | struct ib_mad_agent_private *entry; |
| 1557 | |
| 1558 | /* |
| 1559 | * Routing is based on high 32 bits of transaction ID |
| 1560 | * of MAD. |
| 1561 | */ |
| 1562 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1563 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | if (entry->agent.hi_tid == hi_tid) { |
| 1565 | mad_agent = entry; |
| 1566 | break; |
| 1567 | } |
| 1568 | } |
| 1569 | } else { |
| 1570 | struct ib_mad_mgmt_class_table *class; |
| 1571 | struct ib_mad_mgmt_method_table *method; |
| 1572 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1573 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1574 | struct ib_vendor_mad *vendor_mad; |
| 1575 | int index; |
| 1576 | |
| 1577 | /* |
| 1578 | * Routing is based on version, class, and method |
| 1579 | * For "newer" vendor MADs, also based on OUI |
| 1580 | */ |
| 1581 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) |
| 1582 | goto out; |
| 1583 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { |
| 1584 | class = port_priv->version[ |
| 1585 | mad->mad_hdr.class_version].class; |
| 1586 | if (!class) |
| 1587 | goto out; |
| 1588 | method = class->method_table[convert_mgmt_class( |
| 1589 | mad->mad_hdr.mgmt_class)]; |
| 1590 | if (method) |
| 1591 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1592 | ~IB_MGMT_METHOD_RESP]; |
| 1593 | } else { |
| 1594 | vendor = port_priv->version[ |
| 1595 | mad->mad_hdr.class_version].vendor; |
| 1596 | if (!vendor) |
| 1597 | goto out; |
| 1598 | vendor_class = vendor->vendor_class[vendor_class_index( |
| 1599 | mad->mad_hdr.mgmt_class)]; |
| 1600 | if (!vendor_class) |
| 1601 | goto out; |
| 1602 | /* Find matching OUI */ |
| 1603 | vendor_mad = (struct ib_vendor_mad *)mad; |
| 1604 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
| 1605 | if (index == -1) |
| 1606 | goto out; |
| 1607 | method = vendor_class->method_table[index]; |
| 1608 | if (method) { |
| 1609 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1610 | ~IB_MGMT_METHOD_RESP]; |
| 1611 | } |
| 1612 | } |
| 1613 | } |
| 1614 | |
| 1615 | if (mad_agent) { |
| 1616 | if (mad_agent->agent.recv_handler) |
| 1617 | atomic_inc(&mad_agent->refcount); |
| 1618 | else { |
| 1619 | printk(KERN_NOTICE PFX "No receive handler for client " |
| 1620 | "%p on port %d\n", |
| 1621 | &mad_agent->agent, port_priv->port_num); |
| 1622 | mad_agent = NULL; |
| 1623 | } |
| 1624 | } |
| 1625 | out: |
| 1626 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 1627 | |
| 1628 | return mad_agent; |
| 1629 | } |
| 1630 | |
| 1631 | static int validate_mad(struct ib_mad *mad, u32 qp_num) |
| 1632 | { |
| 1633 | int valid = 0; |
| 1634 | |
| 1635 | /* Make sure MAD base version is understood */ |
| 1636 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { |
| 1637 | printk(KERN_ERR PFX "MAD received with unsupported base " |
| 1638 | "version %d\n", mad->mad_hdr.base_version); |
| 1639 | goto out; |
| 1640 | } |
| 1641 | |
| 1642 | /* Filter SMI packets sent to other than QP0 */ |
| 1643 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 1644 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
| 1645 | if (qp_num == 0) |
| 1646 | valid = 1; |
| 1647 | } else { |
| 1648 | /* Filter GSI packets sent to QP0 */ |
| 1649 | if (qp_num != 0) |
| 1650 | valid = 1; |
| 1651 | } |
| 1652 | |
| 1653 | out: |
| 1654 | return valid; |
| 1655 | } |
| 1656 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1657 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
| 1658 | struct ib_mad_hdr *mad_hdr) |
| 1659 | { |
| 1660 | struct ib_rmpp_mad *rmpp_mad; |
| 1661 | |
| 1662 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; |
| 1663 | return !mad_agent_priv->agent.rmpp_version || |
| 1664 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 1665 | IB_MGMT_RMPP_FLAG_ACTIVE) || |
| 1666 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); |
| 1667 | } |
| 1668 | |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1669 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
| 1670 | struct ib_mad_recv_wc *rwc) |
| 1671 | { |
| 1672 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == |
| 1673 | rwc->recv_buf.mad->mad_hdr.mgmt_class; |
| 1674 | } |
| 1675 | |
| 1676 | static inline int rcv_has_same_gid(struct ib_mad_send_wr_private *wr, |
| 1677 | struct ib_mad_recv_wc *rwc ) |
| 1678 | { |
| 1679 | struct ib_ah_attr attr; |
| 1680 | u8 send_resp, rcv_resp; |
| 1681 | |
| 1682 | send_resp = ((struct ib_mad *)(wr->send_buf.mad))-> |
| 1683 | mad_hdr.method & IB_MGMT_METHOD_RESP; |
| 1684 | rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP; |
| 1685 | |
| 1686 | if (!send_resp && rcv_resp) |
| 1687 | /* is request/response. GID/LIDs are both local (same). */ |
| 1688 | return 1; |
| 1689 | |
| 1690 | if (send_resp == rcv_resp) |
| 1691 | /* both requests, or both responses. GIDs different */ |
| 1692 | return 0; |
| 1693 | |
| 1694 | if (ib_query_ah(wr->send_buf.ah, &attr)) |
| 1695 | /* Assume not equal, to avoid false positives. */ |
| 1696 | return 0; |
| 1697 | |
| 1698 | if (!(attr.ah_flags & IB_AH_GRH) && !(rwc->wc->wc_flags & IB_WC_GRH)) |
| 1699 | return attr.dlid == rwc->wc->slid; |
| 1700 | else if ((attr.ah_flags & IB_AH_GRH) && |
| 1701 | (rwc->wc->wc_flags & IB_WC_GRH)) |
| 1702 | return memcmp(attr.grh.dgid.raw, |
| 1703 | rwc->recv_buf.grh->sgid.raw, 16) == 0; |
| 1704 | else |
| 1705 | /* one has GID, other does not. Assume different */ |
| 1706 | return 0; |
| 1707 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1708 | struct ib_mad_send_wr_private* |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1709 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
| 1710 | struct ib_mad_recv_wc *mad_recv_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | { |
| 1712 | struct ib_mad_send_wr_private *mad_send_wr; |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1713 | struct ib_mad *mad; |
| 1714 | |
| 1715 | mad = (struct ib_mad *)mad_recv_wc->recv_buf.mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | |
| 1717 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
| 1718 | agent_list) { |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1719 | if ((mad_send_wr->tid == mad->mad_hdr.tid) && |
| 1720 | rcv_has_same_class(mad_send_wr, mad_recv_wc) && |
| 1721 | rcv_has_same_gid(mad_send_wr, mad_recv_wc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | return mad_send_wr; |
| 1723 | } |
| 1724 | |
| 1725 | /* |
| 1726 | * It's possible to receive the response before we've |
| 1727 | * been notified that the send has completed |
| 1728 | */ |
| 1729 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
| 1730 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1731 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1732 | mad_send_wr->tid == mad->mad_hdr.tid && |
| 1733 | mad_send_wr->timeout && |
| 1734 | rcv_has_same_class(mad_send_wr, mad_recv_wc) && |
| 1735 | rcv_has_same_gid(mad_send_wr, mad_recv_wc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | /* Verify request has not been canceled */ |
| 1737 | return (mad_send_wr->status == IB_WC_SUCCESS) ? |
| 1738 | mad_send_wr : NULL; |
| 1739 | } |
| 1740 | } |
| 1741 | return NULL; |
| 1742 | } |
| 1743 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1744 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
Hal Rosenstock | 6a0c435 | 2005-07-27 11:45:26 -0700 | [diff] [blame] | 1745 | { |
| 1746 | mad_send_wr->timeout = 0; |
| 1747 | if (mad_send_wr->refcount == 1) { |
| 1748 | list_del(&mad_send_wr->agent_list); |
| 1749 | list_add_tail(&mad_send_wr->agent_list, |
| 1750 | &mad_send_wr->mad_agent_priv->done_list); |
| 1751 | } |
| 1752 | } |
| 1753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1755 | struct ib_mad_recv_wc *mad_recv_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | { |
| 1757 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1758 | struct ib_mad_send_wc mad_send_wc; |
| 1759 | unsigned long flags; |
| 1760 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1761 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
| 1762 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); |
| 1763 | if (mad_agent_priv->agent.rmpp_version) { |
| 1764 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
| 1765 | mad_recv_wc); |
| 1766 | if (!mad_recv_wc) { |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1767 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1768 | return; |
| 1769 | } |
| 1770 | } |
| 1771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | /* Complete corresponding request */ |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1773 | if (response_mad(mad_recv_wc->recv_buf.mad)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1775 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | if (!mad_send_wr) { |
| 1777 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1778 | ib_free_recv_mad(mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1779 | deref_mad_agent(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | return; |
| 1781 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1782 | ib_mark_mad_done(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1784 | |
| 1785 | /* Defined behavior is to complete response before request */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1786 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1787 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1788 | mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | atomic_dec(&mad_agent_priv->refcount); |
| 1790 | |
| 1791 | mad_send_wc.status = IB_WC_SUCCESS; |
| 1792 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1793 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
| 1795 | } else { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1796 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1797 | mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1798 | deref_mad_agent(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | } |
| 1800 | } |
| 1801 | |
| 1802 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, |
| 1803 | struct ib_wc *wc) |
| 1804 | { |
| 1805 | struct ib_mad_qp_info *qp_info; |
| 1806 | struct ib_mad_private_header *mad_priv_hdr; |
| 1807 | struct ib_mad_private *recv, *response; |
| 1808 | struct ib_mad_list_head *mad_list; |
| 1809 | struct ib_mad_agent_private *mad_agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
| 1811 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 1812 | if (!response) |
| 1813 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " |
| 1814 | "for response buffer\n"); |
| 1815 | |
| 1816 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 1817 | qp_info = mad_list->mad_queue->qp_info; |
| 1818 | dequeue_mad(mad_list); |
| 1819 | |
| 1820 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
| 1821 | mad_list); |
| 1822 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); |
| 1823 | dma_unmap_single(port_priv->device->dma_device, |
| 1824 | pci_unmap_addr(&recv->header, mapping), |
| 1825 | sizeof(struct ib_mad_private) - |
| 1826 | sizeof(struct ib_mad_private_header), |
| 1827 | DMA_FROM_DEVICE); |
| 1828 | |
| 1829 | /* Setup MAD receive work completion from "normal" work completion */ |
Sean Hefty | 24239af | 2005-04-16 15:26:08 -0700 | [diff] [blame] | 1830 | recv->header.wc = *wc; |
| 1831 | recv->header.recv_wc.wc = &recv->header.wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
| 1833 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; |
| 1834 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
| 1835 | |
| 1836 | if (atomic_read(&qp_info->snoop_count)) |
| 1837 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); |
| 1838 | |
| 1839 | /* Validate MAD */ |
| 1840 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) |
| 1841 | goto out; |
| 1842 | |
| 1843 | if (recv->mad.mad.mad_hdr.mgmt_class == |
| 1844 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| 1845 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, |
| 1846 | port_priv->device->node_type, |
| 1847 | port_priv->port_num, |
| 1848 | port_priv->device->phys_port_cnt)) |
| 1849 | goto out; |
| 1850 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) |
| 1851 | goto local; |
| 1852 | if (!smi_handle_dr_smp_send(&recv->mad.smp, |
| 1853 | port_priv->device->node_type, |
| 1854 | port_priv->port_num)) |
| 1855 | goto out; |
Ralph Campbell | 5e9f71a | 2006-02-03 14:32:01 -0800 | [diff] [blame] | 1856 | if (!smi_check_local_smp(&recv->mad.smp, port_priv->device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | goto out; |
| 1858 | } |
| 1859 | |
| 1860 | local: |
| 1861 | /* Give driver "right of first refusal" on incoming MAD */ |
| 1862 | if (port_priv->device->process_mad) { |
| 1863 | int ret; |
| 1864 | |
| 1865 | if (!response) { |
| 1866 | printk(KERN_ERR PFX "No memory for response MAD\n"); |
| 1867 | /* |
| 1868 | * Is it better to assume that |
| 1869 | * it wouldn't be processed ? |
| 1870 | */ |
| 1871 | goto out; |
| 1872 | } |
| 1873 | |
| 1874 | ret = port_priv->device->process_mad(port_priv->device, 0, |
| 1875 | port_priv->port_num, |
| 1876 | wc, &recv->grh, |
| 1877 | &recv->mad.mad, |
| 1878 | &response->mad.mad); |
| 1879 | if (ret & IB_MAD_RESULT_SUCCESS) { |
| 1880 | if (ret & IB_MAD_RESULT_CONSUMED) |
| 1881 | goto out; |
| 1882 | if (ret & IB_MAD_RESULT_REPLY) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1883 | agent_send_response(&response->mad.mad, |
| 1884 | &recv->grh, wc, |
| 1885 | port_priv->device, |
| 1886 | port_priv->port_num, |
| 1887 | qp_info->qp->qp_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | goto out; |
| 1889 | } |
| 1890 | } |
| 1891 | } |
| 1892 | |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1893 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | if (mad_agent) { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1895 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | /* |
| 1897 | * recv is freed up in error cases in ib_mad_complete_recv |
| 1898 | * or via recv_handler in ib_mad_complete_recv() |
| 1899 | */ |
| 1900 | recv = NULL; |
| 1901 | } |
| 1902 | |
| 1903 | out: |
| 1904 | /* Post another receive request for this QP */ |
| 1905 | if (response) { |
| 1906 | ib_mad_post_receive_mads(qp_info, response); |
| 1907 | if (recv) |
| 1908 | kmem_cache_free(ib_mad_cache, recv); |
| 1909 | } else |
| 1910 | ib_mad_post_receive_mads(qp_info, recv); |
| 1911 | } |
| 1912 | |
| 1913 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) |
| 1914 | { |
| 1915 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1916 | unsigned long delay; |
| 1917 | |
| 1918 | if (list_empty(&mad_agent_priv->wait_list)) { |
| 1919 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1920 | } else { |
| 1921 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 1922 | struct ib_mad_send_wr_private, |
| 1923 | agent_list); |
| 1924 | |
| 1925 | if (time_after(mad_agent_priv->timeout, |
| 1926 | mad_send_wr->timeout)) { |
| 1927 | mad_agent_priv->timeout = mad_send_wr->timeout; |
| 1928 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1929 | delay = mad_send_wr->timeout - jiffies; |
| 1930 | if ((long)delay <= 0) |
| 1931 | delay = 1; |
| 1932 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 1933 | port_priv->wq, |
| 1934 | &mad_agent_priv->timed_work, delay); |
| 1935 | } |
| 1936 | } |
| 1937 | } |
| 1938 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1939 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1941 | struct ib_mad_agent_private *mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
| 1943 | struct list_head *list_item; |
| 1944 | unsigned long delay; |
| 1945 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1946 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | list_del(&mad_send_wr->agent_list); |
| 1948 | |
| 1949 | delay = mad_send_wr->timeout; |
| 1950 | mad_send_wr->timeout += jiffies; |
| 1951 | |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1952 | if (delay) { |
| 1953 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { |
| 1954 | temp_mad_send_wr = list_entry(list_item, |
| 1955 | struct ib_mad_send_wr_private, |
| 1956 | agent_list); |
| 1957 | if (time_after(mad_send_wr->timeout, |
| 1958 | temp_mad_send_wr->timeout)) |
| 1959 | break; |
| 1960 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | } |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1962 | else |
| 1963 | list_item = &mad_agent_priv->wait_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | list_add(&mad_send_wr->agent_list, list_item); |
| 1965 | |
| 1966 | /* Reschedule a work item if we have a shorter timeout */ |
| 1967 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { |
| 1968 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1969 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
| 1970 | &mad_agent_priv->timed_work, delay); |
| 1971 | } |
| 1972 | } |
| 1973 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1974 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
| 1975 | int timeout_ms) |
| 1976 | { |
| 1977 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 1978 | wait_for_response(mad_send_wr); |
| 1979 | } |
| 1980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | /* |
| 1982 | * Process a send work completion |
| 1983 | */ |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1984 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
| 1985 | struct ib_mad_send_wc *mad_send_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | { |
| 1987 | struct ib_mad_agent_private *mad_agent_priv; |
| 1988 | unsigned long flags; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1989 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1991 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1993 | if (mad_agent_priv->agent.rmpp_version) { |
| 1994 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
| 1995 | if (ret == IB_RMPP_RESULT_CONSUMED) |
| 1996 | goto done; |
| 1997 | } else |
| 1998 | ret = IB_RMPP_RESULT_UNHANDLED; |
| 1999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | if (mad_send_wc->status != IB_WC_SUCCESS && |
| 2001 | mad_send_wr->status == IB_WC_SUCCESS) { |
| 2002 | mad_send_wr->status = mad_send_wc->status; |
| 2003 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 2004 | } |
| 2005 | |
| 2006 | if (--mad_send_wr->refcount > 0) { |
| 2007 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && |
| 2008 | mad_send_wr->status == IB_WC_SUCCESS) { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2009 | wait_for_response(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2011 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | } |
| 2013 | |
| 2014 | /* Remove send from MAD agent and notify client of completion */ |
| 2015 | list_del(&mad_send_wr->agent_list); |
| 2016 | adjust_timeout(mad_agent_priv); |
| 2017 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2018 | |
| 2019 | if (mad_send_wr->status != IB_WC_SUCCESS ) |
| 2020 | mad_send_wc->status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2021 | if (ret == IB_RMPP_RESULT_INTERNAL) |
| 2022 | ib_rmpp_send_handler(mad_send_wc); |
| 2023 | else |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2024 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2025 | mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
| 2027 | /* Release reference on agent taken when sending */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 2028 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2029 | return; |
| 2030 | done: |
| 2031 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | } |
| 2033 | |
| 2034 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, |
| 2035 | struct ib_wc *wc) |
| 2036 | { |
| 2037 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
| 2038 | struct ib_mad_list_head *mad_list; |
| 2039 | struct ib_mad_qp_info *qp_info; |
| 2040 | struct ib_mad_queue *send_queue; |
| 2041 | struct ib_send_wr *bad_send_wr; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2042 | struct ib_mad_send_wc mad_send_wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | unsigned long flags; |
| 2044 | int ret; |
| 2045 | |
| 2046 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 2047 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 2048 | mad_list); |
| 2049 | send_queue = mad_list->mad_queue; |
| 2050 | qp_info = send_queue->qp_info; |
| 2051 | |
| 2052 | retry: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2053 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 2054 | pci_unmap_addr(mad_send_wr, header_mapping), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2055 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 2056 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
| 2057 | pci_unmap_addr(mad_send_wr, payload_mapping), |
| 2058 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | queued_send_wr = NULL; |
| 2060 | spin_lock_irqsave(&send_queue->lock, flags); |
| 2061 | list_del(&mad_list->list); |
| 2062 | |
| 2063 | /* Move queued send to the send queue */ |
| 2064 | if (send_queue->count-- > send_queue->max_active) { |
| 2065 | mad_list = container_of(qp_info->overflow_list.next, |
| 2066 | struct ib_mad_list_head, list); |
| 2067 | queued_send_wr = container_of(mad_list, |
| 2068 | struct ib_mad_send_wr_private, |
| 2069 | mad_list); |
| 2070 | list_del(&mad_list->list); |
| 2071 | list_add_tail(&mad_list->list, &send_queue->list); |
| 2072 | } |
| 2073 | spin_unlock_irqrestore(&send_queue->lock, flags); |
| 2074 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2075 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 2076 | mad_send_wc.status = wc->status; |
| 2077 | mad_send_wc.vendor_err = wc->vendor_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | if (atomic_read(&qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2079 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2081 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | |
| 2083 | if (queued_send_wr) { |
| 2084 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2085 | &bad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | if (ret) { |
| 2087 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); |
| 2088 | mad_send_wr = queued_send_wr; |
| 2089 | wc->status = IB_WC_LOC_QP_OP_ERR; |
| 2090 | goto retry; |
| 2091 | } |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) |
| 2096 | { |
| 2097 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2098 | struct ib_mad_list_head *mad_list; |
| 2099 | unsigned long flags; |
| 2100 | |
| 2101 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
| 2102 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { |
| 2103 | mad_send_wr = container_of(mad_list, |
| 2104 | struct ib_mad_send_wr_private, |
| 2105 | mad_list); |
| 2106 | mad_send_wr->retry = 1; |
| 2107 | } |
| 2108 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
| 2109 | } |
| 2110 | |
| 2111 | static void mad_error_handler(struct ib_mad_port_private *port_priv, |
| 2112 | struct ib_wc *wc) |
| 2113 | { |
| 2114 | struct ib_mad_list_head *mad_list; |
| 2115 | struct ib_mad_qp_info *qp_info; |
| 2116 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2117 | int ret; |
| 2118 | |
| 2119 | /* Determine if failure was a send or receive */ |
| 2120 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 2121 | qp_info = mad_list->mad_queue->qp_info; |
| 2122 | if (mad_list->mad_queue == &qp_info->recv_queue) |
| 2123 | /* |
| 2124 | * Receive errors indicate that the QP has entered the error |
| 2125 | * state - error handling/shutdown code will cleanup |
| 2126 | */ |
| 2127 | return; |
| 2128 | |
| 2129 | /* |
| 2130 | * Send errors will transition the QP to SQE - move |
| 2131 | * QP to RTS and repost flushed work requests |
| 2132 | */ |
| 2133 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 2134 | mad_list); |
| 2135 | if (wc->status == IB_WC_WR_FLUSH_ERR) { |
| 2136 | if (mad_send_wr->retry) { |
| 2137 | /* Repost send */ |
| 2138 | struct ib_send_wr *bad_send_wr; |
| 2139 | |
| 2140 | mad_send_wr->retry = 0; |
| 2141 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, |
| 2142 | &bad_send_wr); |
| 2143 | if (ret) |
| 2144 | ib_mad_send_done_handler(port_priv, wc); |
| 2145 | } else |
| 2146 | ib_mad_send_done_handler(port_priv, wc); |
| 2147 | } else { |
| 2148 | struct ib_qp_attr *attr; |
| 2149 | |
| 2150 | /* Transition QP to RTS and fail offending send */ |
| 2151 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2152 | if (attr) { |
| 2153 | attr->qp_state = IB_QPS_RTS; |
| 2154 | attr->cur_qp_state = IB_QPS_SQE; |
| 2155 | ret = ib_modify_qp(qp_info->qp, attr, |
| 2156 | IB_QP_STATE | IB_QP_CUR_STATE); |
| 2157 | kfree(attr); |
| 2158 | if (ret) |
| 2159 | printk(KERN_ERR PFX "mad_error_handler - " |
| 2160 | "ib_modify_qp to RTS : %d\n", ret); |
| 2161 | else |
| 2162 | mark_sends_for_retry(qp_info); |
| 2163 | } |
| 2164 | ib_mad_send_done_handler(port_priv, wc); |
| 2165 | } |
| 2166 | } |
| 2167 | |
| 2168 | /* |
| 2169 | * IB MAD completion callback |
| 2170 | */ |
| 2171 | static void ib_mad_completion_handler(void *data) |
| 2172 | { |
| 2173 | struct ib_mad_port_private *port_priv; |
| 2174 | struct ib_wc wc; |
| 2175 | |
| 2176 | port_priv = (struct ib_mad_port_private *)data; |
| 2177 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2178 | |
| 2179 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { |
| 2180 | if (wc.status == IB_WC_SUCCESS) { |
| 2181 | switch (wc.opcode) { |
| 2182 | case IB_WC_SEND: |
| 2183 | ib_mad_send_done_handler(port_priv, &wc); |
| 2184 | break; |
| 2185 | case IB_WC_RECV: |
| 2186 | ib_mad_recv_done_handler(port_priv, &wc); |
| 2187 | break; |
| 2188 | default: |
| 2189 | BUG_ON(1); |
| 2190 | break; |
| 2191 | } |
| 2192 | } else |
| 2193 | mad_error_handler(port_priv, &wc); |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) |
| 2198 | { |
| 2199 | unsigned long flags; |
| 2200 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; |
| 2201 | struct ib_mad_send_wc mad_send_wc; |
| 2202 | struct list_head cancel_list; |
| 2203 | |
| 2204 | INIT_LIST_HEAD(&cancel_list); |
| 2205 | |
| 2206 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2207 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2208 | &mad_agent_priv->send_list, agent_list) { |
| 2209 | if (mad_send_wr->status == IB_WC_SUCCESS) { |
| 2210 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
| 2211 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 2212 | } |
| 2213 | } |
| 2214 | |
| 2215 | /* Empty wait list to prevent receives from finding a request */ |
| 2216 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2217 | /* Empty local completion list as well */ |
| 2218 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2220 | |
| 2221 | /* Report all cancelled requests */ |
| 2222 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; |
| 2223 | mad_send_wc.vendor_err = 0; |
| 2224 | |
| 2225 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2226 | &cancel_list, agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2227 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 2228 | list_del(&mad_send_wr->agent_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2230 | &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | atomic_dec(&mad_agent_priv->refcount); |
| 2232 | } |
| 2233 | } |
| 2234 | |
| 2235 | static struct ib_mad_send_wr_private* |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2236 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
| 2237 | struct ib_mad_send_buf *send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | { |
| 2239 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2240 | |
| 2241 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
| 2242 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2243 | if (&mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | return mad_send_wr; |
| 2245 | } |
| 2246 | |
| 2247 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
| 2248 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2249 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
| 2250 | &mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | return mad_send_wr; |
| 2252 | } |
| 2253 | return NULL; |
| 2254 | } |
| 2255 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2256 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
| 2257 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | { |
| 2259 | struct ib_mad_agent_private *mad_agent_priv; |
| 2260 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2261 | unsigned long flags; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2262 | int active; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | |
| 2264 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 2265 | agent); |
| 2266 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2267 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2268 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2270 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | } |
| 2272 | |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2273 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2274 | if (!timeout_ms) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2276 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | } |
| 2278 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2279 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2280 | if (active) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2281 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 2282 | else |
| 2283 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2285 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2286 | return 0; |
| 2287 | } |
| 2288 | EXPORT_SYMBOL(ib_modify_mad); |
| 2289 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2290 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
| 2291 | struct ib_mad_send_buf *send_buf) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2292 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2293 | ib_modify_mad(mad_agent, send_buf, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | } |
| 2295 | EXPORT_SYMBOL(ib_cancel_mad); |
| 2296 | |
| 2297 | static void local_completions(void *data) |
| 2298 | { |
| 2299 | struct ib_mad_agent_private *mad_agent_priv; |
| 2300 | struct ib_mad_local_private *local; |
| 2301 | struct ib_mad_agent_private *recv_mad_agent; |
| 2302 | unsigned long flags; |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2303 | int recv = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | struct ib_wc wc; |
| 2305 | struct ib_mad_send_wc mad_send_wc; |
| 2306 | |
| 2307 | mad_agent_priv = (struct ib_mad_agent_private *)data; |
| 2308 | |
| 2309 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2310 | while (!list_empty(&mad_agent_priv->local_list)) { |
| 2311 | local = list_entry(mad_agent_priv->local_list.next, |
| 2312 | struct ib_mad_local_private, |
| 2313 | completion_list); |
Michael S. Tsirkin | 37289ef | 2006-03-30 15:52:54 +0200 | [diff] [blame] | 2314 | list_del(&local->completion_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2316 | if (local->mad_priv) { |
| 2317 | recv_mad_agent = local->recv_mad_agent; |
| 2318 | if (!recv_mad_agent) { |
| 2319 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | goto local_send_completion; |
| 2321 | } |
| 2322 | |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2323 | recv = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2324 | /* |
| 2325 | * Defined behavior is to complete response |
| 2326 | * before request |
| 2327 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2328 | build_smp_wc((unsigned long) local->mad_send_wr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2329 | be16_to_cpu(IB_LID_PERMISSIVE), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2330 | 0, recv_mad_agent->agent.port_num, &wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | |
| 2332 | local->mad_priv->header.recv_wc.wc = &wc; |
| 2333 | local->mad_priv->header.recv_wc.mad_len = |
| 2334 | sizeof(struct ib_mad); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2335 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
| 2336 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, |
| 2337 | &local->mad_priv->header.recv_wc.rmpp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
| 2339 | local->mad_priv->header.recv_wc.recv_buf.mad = |
| 2340 | &local->mad_priv->mad.mad; |
| 2341 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
| 2342 | snoop_recv(recv_mad_agent->qp_info, |
| 2343 | &local->mad_priv->header.recv_wc, |
| 2344 | IB_MAD_SNOOP_RECVS); |
| 2345 | recv_mad_agent->agent.recv_handler( |
| 2346 | &recv_mad_agent->agent, |
| 2347 | &local->mad_priv->header.recv_wc); |
| 2348 | spin_lock_irqsave(&recv_mad_agent->lock, flags); |
| 2349 | atomic_dec(&recv_mad_agent->refcount); |
| 2350 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); |
| 2351 | } |
| 2352 | |
| 2353 | local_send_completion: |
| 2354 | /* Complete send */ |
| 2355 | mad_send_wc.status = IB_WC_SUCCESS; |
| 2356 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2357 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2359 | snoop_send(mad_agent_priv->qp_info, |
| 2360 | &local->mad_send_wr->send_buf, |
| 2361 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2363 | &mad_send_wc); |
| 2364 | |
| 2365 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | atomic_dec(&mad_agent_priv->refcount); |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2367 | if (!recv) |
| 2368 | kmem_cache_free(ib_mad_cache, local->mad_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | kfree(local); |
| 2370 | } |
| 2371 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2372 | } |
| 2373 | |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2374 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
| 2375 | { |
| 2376 | int ret; |
| 2377 | |
| 2378 | if (!mad_send_wr->retries--) |
| 2379 | return -ETIMEDOUT; |
| 2380 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2381 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2382 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2383 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
| 2384 | ret = ib_retry_rmpp(mad_send_wr); |
| 2385 | switch (ret) { |
| 2386 | case IB_RMPP_RESULT_UNHANDLED: |
| 2387 | ret = ib_send_mad(mad_send_wr); |
| 2388 | break; |
| 2389 | case IB_RMPP_RESULT_CONSUMED: |
| 2390 | ret = 0; |
| 2391 | break; |
| 2392 | default: |
| 2393 | ret = -ECOMM; |
| 2394 | break; |
| 2395 | } |
| 2396 | } else |
| 2397 | ret = ib_send_mad(mad_send_wr); |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2398 | |
| 2399 | if (!ret) { |
| 2400 | mad_send_wr->refcount++; |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2401 | list_add_tail(&mad_send_wr->agent_list, |
| 2402 | &mad_send_wr->mad_agent_priv->send_list); |
| 2403 | } |
| 2404 | return ret; |
| 2405 | } |
| 2406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | static void timeout_sends(void *data) |
| 2408 | { |
| 2409 | struct ib_mad_agent_private *mad_agent_priv; |
| 2410 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2411 | struct ib_mad_send_wc mad_send_wc; |
| 2412 | unsigned long flags, delay; |
| 2413 | |
| 2414 | mad_agent_priv = (struct ib_mad_agent_private *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | mad_send_wc.vendor_err = 0; |
| 2416 | |
| 2417 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2418 | while (!list_empty(&mad_agent_priv->wait_list)) { |
| 2419 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 2420 | struct ib_mad_send_wr_private, |
| 2421 | agent_list); |
| 2422 | |
| 2423 | if (time_after(mad_send_wr->timeout, jiffies)) { |
| 2424 | delay = mad_send_wr->timeout - jiffies; |
| 2425 | if ((long)delay <= 0) |
| 2426 | delay = 1; |
| 2427 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 2428 | port_priv->wq, |
| 2429 | &mad_agent_priv->timed_work, delay); |
| 2430 | break; |
| 2431 | } |
| 2432 | |
Hal Rosenstock | dbf9227 | 2005-07-27 11:45:30 -0700 | [diff] [blame] | 2433 | list_del(&mad_send_wr->agent_list); |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2434 | if (mad_send_wr->status == IB_WC_SUCCESS && |
| 2435 | !retry_send(mad_send_wr)) |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2436 | continue; |
| 2437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2439 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2440 | if (mad_send_wr->status == IB_WC_SUCCESS) |
| 2441 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; |
| 2442 | else |
| 2443 | mad_send_wc.status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2444 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2446 | &mad_send_wc); |
| 2447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | atomic_dec(&mad_agent_priv->refcount); |
| 2449 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2450 | } |
| 2451 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2452 | } |
| 2453 | |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2454 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | { |
| 2456 | struct ib_mad_port_private *port_priv = cq->cq_context; |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2457 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2459 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2460 | if (!list_empty(&port_priv->port_list)) |
| 2461 | queue_work(port_priv->wq, &port_priv->work); |
| 2462 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | } |
| 2464 | |
| 2465 | /* |
| 2466 | * Allocate receive MADs and post receive WRs for them |
| 2467 | */ |
| 2468 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| 2469 | struct ib_mad_private *mad) |
| 2470 | { |
| 2471 | unsigned long flags; |
| 2472 | int post, ret; |
| 2473 | struct ib_mad_private *mad_priv; |
| 2474 | struct ib_sge sg_list; |
| 2475 | struct ib_recv_wr recv_wr, *bad_recv_wr; |
| 2476 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; |
| 2477 | |
| 2478 | /* Initialize common scatter list fields */ |
| 2479 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; |
| 2480 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; |
| 2481 | |
| 2482 | /* Initialize common receive WR fields */ |
| 2483 | recv_wr.next = NULL; |
| 2484 | recv_wr.sg_list = &sg_list; |
| 2485 | recv_wr.num_sge = 1; |
| 2486 | |
| 2487 | do { |
| 2488 | /* Allocate and map receive buffer */ |
| 2489 | if (mad) { |
| 2490 | mad_priv = mad; |
| 2491 | mad = NULL; |
| 2492 | } else { |
| 2493 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 2494 | if (!mad_priv) { |
| 2495 | printk(KERN_ERR PFX "No memory for receive buffer\n"); |
| 2496 | ret = -ENOMEM; |
| 2497 | break; |
| 2498 | } |
| 2499 | } |
| 2500 | sg_list.addr = dma_map_single(qp_info->port_priv-> |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 2501 | device->dma_device, |
| 2502 | &mad_priv->grh, |
| 2503 | sizeof *mad_priv - |
| 2504 | sizeof mad_priv->header, |
| 2505 | DMA_FROM_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); |
| 2507 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
| 2508 | mad_priv->header.mad_list.mad_queue = recv_queue; |
| 2509 | |
| 2510 | /* Post receive WR */ |
| 2511 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2512 | post = (++recv_queue->count < recv_queue->max_active); |
| 2513 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); |
| 2514 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
| 2515 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); |
| 2516 | if (ret) { |
| 2517 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2518 | list_del(&mad_priv->header.mad_list.list); |
| 2519 | recv_queue->count--; |
| 2520 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
| 2521 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
| 2522 | pci_unmap_addr(&mad_priv->header, |
| 2523 | mapping), |
| 2524 | sizeof *mad_priv - |
| 2525 | sizeof mad_priv->header, |
| 2526 | DMA_FROM_DEVICE); |
| 2527 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 2528 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); |
| 2529 | break; |
| 2530 | } |
| 2531 | } while (post); |
| 2532 | |
| 2533 | return ret; |
| 2534 | } |
| 2535 | |
| 2536 | /* |
| 2537 | * Return all the posted receive MADs |
| 2538 | */ |
| 2539 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) |
| 2540 | { |
| 2541 | struct ib_mad_private_header *mad_priv_hdr; |
| 2542 | struct ib_mad_private *recv; |
| 2543 | struct ib_mad_list_head *mad_list; |
| 2544 | |
| 2545 | while (!list_empty(&qp_info->recv_queue.list)) { |
| 2546 | |
| 2547 | mad_list = list_entry(qp_info->recv_queue.list.next, |
| 2548 | struct ib_mad_list_head, list); |
| 2549 | mad_priv_hdr = container_of(mad_list, |
| 2550 | struct ib_mad_private_header, |
| 2551 | mad_list); |
| 2552 | recv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 2553 | header); |
| 2554 | |
| 2555 | /* Remove from posted receive MAD list */ |
| 2556 | list_del(&mad_list->list); |
| 2557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
| 2559 | pci_unmap_addr(&recv->header, mapping), |
| 2560 | sizeof(struct ib_mad_private) - |
| 2561 | sizeof(struct ib_mad_private_header), |
| 2562 | DMA_FROM_DEVICE); |
| 2563 | kmem_cache_free(ib_mad_cache, recv); |
| 2564 | } |
| 2565 | |
| 2566 | qp_info->recv_queue.count = 0; |
| 2567 | } |
| 2568 | |
| 2569 | /* |
| 2570 | * Start the port |
| 2571 | */ |
| 2572 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) |
| 2573 | { |
| 2574 | int ret, i; |
| 2575 | struct ib_qp_attr *attr; |
| 2576 | struct ib_qp *qp; |
| 2577 | |
| 2578 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2579 | if (!attr) { |
| 2580 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
| 2581 | return -ENOMEM; |
| 2582 | } |
| 2583 | |
| 2584 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
| 2585 | qp = port_priv->qp_info[i].qp; |
| 2586 | /* |
| 2587 | * PKey index for QP1 is irrelevant but |
| 2588 | * one is needed for the Reset to Init transition |
| 2589 | */ |
| 2590 | attr->qp_state = IB_QPS_INIT; |
| 2591 | attr->pkey_index = 0; |
| 2592 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
| 2593 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | |
| 2594 | IB_QP_PKEY_INDEX | IB_QP_QKEY); |
| 2595 | if (ret) { |
| 2596 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2597 | "INIT: %d\n", i, ret); |
| 2598 | goto out; |
| 2599 | } |
| 2600 | |
| 2601 | attr->qp_state = IB_QPS_RTR; |
| 2602 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); |
| 2603 | if (ret) { |
| 2604 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2605 | "RTR: %d\n", i, ret); |
| 2606 | goto out; |
| 2607 | } |
| 2608 | |
| 2609 | attr->qp_state = IB_QPS_RTS; |
| 2610 | attr->sq_psn = IB_MAD_SEND_Q_PSN; |
| 2611 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); |
| 2612 | if (ret) { |
| 2613 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2614 | "RTS: %d\n", i, ret); |
| 2615 | goto out; |
| 2616 | } |
| 2617 | } |
| 2618 | |
| 2619 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2620 | if (ret) { |
| 2621 | printk(KERN_ERR PFX "Failed to request completion " |
| 2622 | "notification: %d\n", ret); |
| 2623 | goto out; |
| 2624 | } |
| 2625 | |
| 2626 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
| 2627 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
| 2628 | if (ret) { |
| 2629 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); |
| 2630 | goto out; |
| 2631 | } |
| 2632 | } |
| 2633 | out: |
| 2634 | kfree(attr); |
| 2635 | return ret; |
| 2636 | } |
| 2637 | |
| 2638 | static void qp_event_handler(struct ib_event *event, void *qp_context) |
| 2639 | { |
| 2640 | struct ib_mad_qp_info *qp_info = qp_context; |
| 2641 | |
| 2642 | /* It's worse than that! He's dead, Jim! */ |
| 2643 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", |
| 2644 | event->event, qp_info->qp->qp_num); |
| 2645 | } |
| 2646 | |
| 2647 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, |
| 2648 | struct ib_mad_queue *mad_queue) |
| 2649 | { |
| 2650 | mad_queue->qp_info = qp_info; |
| 2651 | mad_queue->count = 0; |
| 2652 | spin_lock_init(&mad_queue->lock); |
| 2653 | INIT_LIST_HEAD(&mad_queue->list); |
| 2654 | } |
| 2655 | |
| 2656 | static void init_mad_qp(struct ib_mad_port_private *port_priv, |
| 2657 | struct ib_mad_qp_info *qp_info) |
| 2658 | { |
| 2659 | qp_info->port_priv = port_priv; |
| 2660 | init_mad_queue(qp_info, &qp_info->send_queue); |
| 2661 | init_mad_queue(qp_info, &qp_info->recv_queue); |
| 2662 | INIT_LIST_HEAD(&qp_info->overflow_list); |
| 2663 | spin_lock_init(&qp_info->snoop_lock); |
| 2664 | qp_info->snoop_table = NULL; |
| 2665 | qp_info->snoop_table_size = 0; |
| 2666 | atomic_set(&qp_info->snoop_count, 0); |
| 2667 | } |
| 2668 | |
| 2669 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, |
| 2670 | enum ib_qp_type qp_type) |
| 2671 | { |
| 2672 | struct ib_qp_init_attr qp_init_attr; |
| 2673 | int ret; |
| 2674 | |
| 2675 | memset(&qp_init_attr, 0, sizeof qp_init_attr); |
| 2676 | qp_init_attr.send_cq = qp_info->port_priv->cq; |
| 2677 | qp_init_attr.recv_cq = qp_info->port_priv->cq; |
| 2678 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; |
| 2679 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; |
| 2680 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; |
| 2681 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
| 2682 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; |
| 2683 | qp_init_attr.qp_type = qp_type; |
| 2684 | qp_init_attr.port_num = qp_info->port_priv->port_num; |
| 2685 | qp_init_attr.qp_context = qp_info; |
| 2686 | qp_init_attr.event_handler = qp_event_handler; |
| 2687 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); |
| 2688 | if (IS_ERR(qp_info->qp)) { |
| 2689 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", |
| 2690 | get_spl_qp_index(qp_type)); |
| 2691 | ret = PTR_ERR(qp_info->qp); |
| 2692 | goto error; |
| 2693 | } |
| 2694 | /* Use minimum queue sizes unless the CQ is resized */ |
| 2695 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; |
| 2696 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; |
| 2697 | return 0; |
| 2698 | |
| 2699 | error: |
| 2700 | return ret; |
| 2701 | } |
| 2702 | |
| 2703 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) |
| 2704 | { |
| 2705 | ib_destroy_qp(qp_info->qp); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 2706 | kfree(qp_info->snoop_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | } |
| 2708 | |
| 2709 | /* |
| 2710 | * Open the port |
| 2711 | * Create the QP, PD, MR, and CQ if needed |
| 2712 | */ |
| 2713 | static int ib_mad_port_open(struct ib_device *device, |
| 2714 | int port_num) |
| 2715 | { |
| 2716 | int ret, cq_size; |
| 2717 | struct ib_mad_port_private *port_priv; |
| 2718 | unsigned long flags; |
| 2719 | char name[sizeof "ib_mad123"]; |
| 2720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | /* Create new device info */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2722 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | if (!port_priv) { |
| 2724 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); |
| 2725 | return -ENOMEM; |
| 2726 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | port_priv->device = device; |
| 2729 | port_priv->port_num = port_num; |
| 2730 | spin_lock_init(&port_priv->reg_lock); |
| 2731 | INIT_LIST_HEAD(&port_priv->agent_list); |
| 2732 | init_mad_qp(port_priv, &port_priv->qp_info[0]); |
| 2733 | init_mad_qp(port_priv, &port_priv->qp_info[1]); |
| 2734 | |
| 2735 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; |
| 2736 | port_priv->cq = ib_create_cq(port_priv->device, |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2737 | ib_mad_thread_completion_handler, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | NULL, port_priv, cq_size); |
| 2739 | if (IS_ERR(port_priv->cq)) { |
| 2740 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); |
| 2741 | ret = PTR_ERR(port_priv->cq); |
| 2742 | goto error3; |
| 2743 | } |
| 2744 | |
| 2745 | port_priv->pd = ib_alloc_pd(device); |
| 2746 | if (IS_ERR(port_priv->pd)) { |
| 2747 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); |
| 2748 | ret = PTR_ERR(port_priv->pd); |
| 2749 | goto error4; |
| 2750 | } |
| 2751 | |
| 2752 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); |
| 2753 | if (IS_ERR(port_priv->mr)) { |
| 2754 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); |
| 2755 | ret = PTR_ERR(port_priv->mr); |
| 2756 | goto error5; |
| 2757 | } |
| 2758 | |
| 2759 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); |
| 2760 | if (ret) |
| 2761 | goto error6; |
| 2762 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
| 2763 | if (ret) |
| 2764 | goto error7; |
| 2765 | |
| 2766 | snprintf(name, sizeof name, "ib_mad%d", port_num); |
| 2767 | port_priv->wq = create_singlethread_workqueue(name); |
| 2768 | if (!port_priv->wq) { |
| 2769 | ret = -ENOMEM; |
| 2770 | goto error8; |
| 2771 | } |
| 2772 | INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv); |
| 2773 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2774 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2775 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); |
| 2776 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | ret = ib_mad_port_start(port_priv); |
| 2779 | if (ret) { |
| 2780 | printk(KERN_ERR PFX "Couldn't start port\n"); |
| 2781 | goto error9; |
| 2782 | } |
| 2783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | return 0; |
| 2785 | |
| 2786 | error9: |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2787 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2788 | list_del_init(&port_priv->port_list); |
| 2789 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | destroy_workqueue(port_priv->wq); |
| 2792 | error8: |
| 2793 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2794 | error7: |
| 2795 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2796 | error6: |
| 2797 | ib_dereg_mr(port_priv->mr); |
| 2798 | error5: |
| 2799 | ib_dealloc_pd(port_priv->pd); |
| 2800 | error4: |
| 2801 | ib_destroy_cq(port_priv->cq); |
| 2802 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2803 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2804 | error3: |
| 2805 | kfree(port_priv); |
| 2806 | |
| 2807 | return ret; |
| 2808 | } |
| 2809 | |
| 2810 | /* |
| 2811 | * Close the port |
| 2812 | * If there are no classes using the port, free the port |
| 2813 | * resources (CQ, MR, PD, QP) and remove the port's info structure |
| 2814 | */ |
| 2815 | static int ib_mad_port_close(struct ib_device *device, int port_num) |
| 2816 | { |
| 2817 | struct ib_mad_port_private *port_priv; |
| 2818 | unsigned long flags; |
| 2819 | |
| 2820 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2821 | port_priv = __ib_get_mad_port(device, port_num); |
| 2822 | if (port_priv == NULL) { |
| 2823 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2824 | printk(KERN_ERR PFX "Port %d not found\n", port_num); |
| 2825 | return -ENODEV; |
| 2826 | } |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2827 | list_del_init(&port_priv->port_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | destroy_workqueue(port_priv->wq); |
| 2831 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2832 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2833 | ib_dereg_mr(port_priv->mr); |
| 2834 | ib_dealloc_pd(port_priv->pd); |
| 2835 | ib_destroy_cq(port_priv->cq); |
| 2836 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2837 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2838 | /* XXX: Handle deallocation of MAD registration tables */ |
| 2839 | |
| 2840 | kfree(port_priv); |
| 2841 | |
| 2842 | return 0; |
| 2843 | } |
| 2844 | |
| 2845 | static void ib_mad_init_device(struct ib_device *device) |
| 2846 | { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2847 | int start, end, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | |
| 2849 | if (device->node_type == IB_NODE_SWITCH) { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2850 | start = 0; |
| 2851 | end = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | } else { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2853 | start = 1; |
| 2854 | end = device->phys_port_cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2856 | |
| 2857 | for (i = start; i <= end; i++) { |
| 2858 | if (ib_mad_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2860 | device->name, i); |
| 2861 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2863 | if (ib_agent_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2864 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
| 2865 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2866 | device->name, i); |
| 2867 | goto error_agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2868 | } |
| 2869 | } |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2870 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2872 | error_agent: |
| 2873 | if (ib_mad_port_close(device, i)) |
| 2874 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 2875 | device->name, i); |
| 2876 | |
| 2877 | error: |
| 2878 | i--; |
| 2879 | |
| 2880 | while (i >= start) { |
| 2881 | if (ib_agent_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2882 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 2883 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2884 | device->name, i); |
| 2885 | if (ib_mad_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2887 | device->name, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | i--; |
| 2889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2890 | } |
| 2891 | |
| 2892 | static void ib_mad_remove_device(struct ib_device *device) |
| 2893 | { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2894 | int i, num_ports, cur_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | |
| 2896 | if (device->node_type == IB_NODE_SWITCH) { |
| 2897 | num_ports = 1; |
| 2898 | cur_port = 0; |
| 2899 | } else { |
| 2900 | num_ports = device->phys_port_cnt; |
| 2901 | cur_port = 1; |
| 2902 | } |
| 2903 | for (i = 0; i < num_ports; i++, cur_port++) { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2904 | if (ib_agent_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 2906 | "for agents\n", |
| 2907 | device->name, cur_port); |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2908 | if (ib_mad_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 2910 | device->name, cur_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | } |
| 2912 | } |
| 2913 | |
| 2914 | static struct ib_client mad_client = { |
| 2915 | .name = "mad", |
| 2916 | .add = ib_mad_init_device, |
| 2917 | .remove = ib_mad_remove_device |
| 2918 | }; |
| 2919 | |
| 2920 | static int __init ib_mad_init_module(void) |
| 2921 | { |
| 2922 | int ret; |
| 2923 | |
| 2924 | spin_lock_init(&ib_mad_port_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | |
| 2926 | ib_mad_cache = kmem_cache_create("ib_mad", |
| 2927 | sizeof(struct ib_mad_private), |
| 2928 | 0, |
| 2929 | SLAB_HWCACHE_ALIGN, |
| 2930 | NULL, |
| 2931 | NULL); |
| 2932 | if (!ib_mad_cache) { |
| 2933 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); |
| 2934 | ret = -ENOMEM; |
| 2935 | goto error1; |
| 2936 | } |
| 2937 | |
| 2938 | INIT_LIST_HEAD(&ib_mad_port_list); |
| 2939 | |
| 2940 | if (ib_register_client(&mad_client)) { |
| 2941 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); |
| 2942 | ret = -EINVAL; |
| 2943 | goto error2; |
| 2944 | } |
| 2945 | |
| 2946 | return 0; |
| 2947 | |
| 2948 | error2: |
| 2949 | kmem_cache_destroy(ib_mad_cache); |
| 2950 | error1: |
| 2951 | return ret; |
| 2952 | } |
| 2953 | |
| 2954 | static void __exit ib_mad_cleanup_module(void) |
| 2955 | { |
| 2956 | ib_unregister_client(&mad_client); |
| 2957 | |
| 2958 | if (kmem_cache_destroy(ib_mad_cache)) { |
| 2959 | printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n"); |
| 2960 | } |
| 2961 | } |
| 2962 | |
| 2963 | module_init(ib_mad_init_module); |
| 2964 | module_exit(ib_mad_cleanup_module); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2965 | |