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 | } |
| 230 | /* Make sure class supplied is consistent with QP type */ |
| 231 | if (qp_type == IB_QPT_SMI) { |
| 232 | if ((mad_reg_req->mgmt_class != |
| 233 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && |
| 234 | (mad_reg_req->mgmt_class != |
| 235 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 236 | goto error1; |
| 237 | } else { |
| 238 | if ((mad_reg_req->mgmt_class == |
| 239 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 240 | (mad_reg_req->mgmt_class == |
| 241 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 242 | goto error1; |
| 243 | } |
| 244 | } else { |
| 245 | /* No registration request supplied */ |
| 246 | if (!send_handler) |
| 247 | goto error1; |
| 248 | } |
| 249 | |
| 250 | /* Validate device and port */ |
| 251 | port_priv = ib_get_mad_port(device, port_num); |
| 252 | if (!port_priv) { |
| 253 | ret = ERR_PTR(-ENODEV); |
| 254 | goto error1; |
| 255 | } |
| 256 | |
| 257 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 258 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (!mad_agent_priv) { |
| 260 | ret = ERR_PTR(-ENOMEM); |
| 261 | goto error1; |
| 262 | } |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 263 | |
| 264 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, |
| 265 | IB_ACCESS_LOCAL_WRITE); |
| 266 | if (IS_ERR(mad_agent_priv->agent.mr)) { |
| 267 | ret = ERR_PTR(-ENOMEM); |
| 268 | goto error2; |
| 269 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | if (mad_reg_req) { |
| 272 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); |
| 273 | if (!reg_req) { |
| 274 | ret = ERR_PTR(-ENOMEM); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 275 | goto error3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | /* Make a copy of the MAD registration request */ |
| 278 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); |
| 279 | } |
| 280 | |
| 281 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
| 283 | mad_agent_priv->reg_req = reg_req; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 284 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | mad_agent_priv->agent.device = device; |
| 286 | mad_agent_priv->agent.recv_handler = recv_handler; |
| 287 | mad_agent_priv->agent.send_handler = send_handler; |
| 288 | mad_agent_priv->agent.context = context; |
| 289 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 290 | mad_agent_priv->agent.port_num = port_num; |
| 291 | |
| 292 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 293 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; |
| 294 | |
| 295 | /* |
| 296 | * Make sure MAD registration (if supplied) |
| 297 | * is non overlapping with any existing ones |
| 298 | */ |
| 299 | if (mad_reg_req) { |
| 300 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); |
| 301 | if (!is_vendor_class(mgmt_class)) { |
| 302 | class = port_priv->version[mad_reg_req-> |
| 303 | mgmt_class_version].class; |
| 304 | if (class) { |
| 305 | method = class->method_table[mgmt_class]; |
| 306 | if (method) { |
| 307 | if (method_in_use(&method, |
| 308 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 309 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | } |
| 312 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, |
| 313 | mgmt_class); |
| 314 | } else { |
| 315 | /* "New" vendor class range */ |
| 316 | vendor = port_priv->version[mad_reg_req-> |
| 317 | mgmt_class_version].vendor; |
| 318 | if (vendor) { |
| 319 | vclass = vendor_class_index(mgmt_class); |
| 320 | vendor_class = vendor->vendor_class[vclass]; |
| 321 | if (vendor_class) { |
| 322 | if (is_vendor_method_in_use( |
| 323 | vendor_class, |
| 324 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 325 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | } |
| 328 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); |
| 329 | } |
| 330 | if (ret2) { |
| 331 | ret = ERR_PTR(ret2); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 332 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | } |
| 335 | |
| 336 | /* Add mad agent into port's agent list */ |
| 337 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); |
| 338 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 339 | |
| 340 | spin_lock_init(&mad_agent_priv->lock); |
| 341 | INIT_LIST_HEAD(&mad_agent_priv->send_list); |
| 342 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); |
Hal Rosenstock | 6a0c435 | 2005-07-27 11:45:26 -0700 | [diff] [blame] | 343 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 344 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv); |
| 346 | INIT_LIST_HEAD(&mad_agent_priv->local_list); |
| 347 | INIT_WORK(&mad_agent_priv->local_work, local_completions, |
| 348 | mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | atomic_set(&mad_agent_priv->refcount, 1); |
| 350 | init_waitqueue_head(&mad_agent_priv->wait); |
| 351 | |
| 352 | return &mad_agent_priv->agent; |
| 353 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 354 | error4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 356 | kfree(reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 357 | error3: |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 358 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Adrian Bunk | 2012a11 | 2005-11-27 00:37:36 +0100 | [diff] [blame] | 359 | error2: |
| 360 | kfree(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | error1: |
| 362 | return ret; |
| 363 | } |
| 364 | EXPORT_SYMBOL(ib_register_mad_agent); |
| 365 | |
| 366 | static inline int is_snooping_sends(int mad_snoop_flags) |
| 367 | { |
| 368 | return (mad_snoop_flags & |
| 369 | (/*IB_MAD_SNOOP_POSTED_SENDS | |
| 370 | IB_MAD_SNOOP_RMPP_SENDS |*/ |
| 371 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| |
| 372 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); |
| 373 | } |
| 374 | |
| 375 | static inline int is_snooping_recvs(int mad_snoop_flags) |
| 376 | { |
| 377 | return (mad_snoop_flags & |
| 378 | (IB_MAD_SNOOP_RECVS /*| |
| 379 | IB_MAD_SNOOP_RMPP_RECVS*/)); |
| 380 | } |
| 381 | |
| 382 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, |
| 383 | struct ib_mad_snoop_private *mad_snoop_priv) |
| 384 | { |
| 385 | struct ib_mad_snoop_private **new_snoop_table; |
| 386 | unsigned long flags; |
| 387 | int i; |
| 388 | |
| 389 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 390 | /* Check for empty slot in array. */ |
| 391 | for (i = 0; i < qp_info->snoop_table_size; i++) |
| 392 | if (!qp_info->snoop_table[i]) |
| 393 | break; |
| 394 | |
| 395 | if (i == qp_info->snoop_table_size) { |
| 396 | /* Grow table. */ |
| 397 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * |
| 398 | qp_info->snoop_table_size + 1, |
| 399 | GFP_ATOMIC); |
| 400 | if (!new_snoop_table) { |
| 401 | i = -ENOMEM; |
| 402 | goto out; |
| 403 | } |
| 404 | if (qp_info->snoop_table) { |
| 405 | memcpy(new_snoop_table, qp_info->snoop_table, |
| 406 | sizeof mad_snoop_priv * |
| 407 | qp_info->snoop_table_size); |
| 408 | kfree(qp_info->snoop_table); |
| 409 | } |
| 410 | qp_info->snoop_table = new_snoop_table; |
| 411 | qp_info->snoop_table_size++; |
| 412 | } |
| 413 | qp_info->snoop_table[i] = mad_snoop_priv; |
| 414 | atomic_inc(&qp_info->snoop_count); |
| 415 | out: |
| 416 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 417 | return i; |
| 418 | } |
| 419 | |
| 420 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, |
| 421 | u8 port_num, |
| 422 | enum ib_qp_type qp_type, |
| 423 | int mad_snoop_flags, |
| 424 | ib_mad_snoop_handler snoop_handler, |
| 425 | ib_mad_recv_handler recv_handler, |
| 426 | void *context) |
| 427 | { |
| 428 | struct ib_mad_port_private *port_priv; |
| 429 | struct ib_mad_agent *ret; |
| 430 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 431 | int qpn; |
| 432 | |
| 433 | /* Validate parameters */ |
| 434 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || |
| 435 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { |
| 436 | ret = ERR_PTR(-EINVAL); |
| 437 | goto error1; |
| 438 | } |
| 439 | qpn = get_spl_qp_index(qp_type); |
| 440 | if (qpn == -1) { |
| 441 | ret = ERR_PTR(-EINVAL); |
| 442 | goto error1; |
| 443 | } |
| 444 | port_priv = ib_get_mad_port(device, port_num); |
| 445 | if (!port_priv) { |
| 446 | ret = ERR_PTR(-ENODEV); |
| 447 | goto error1; |
| 448 | } |
| 449 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 450 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | if (!mad_snoop_priv) { |
| 452 | ret = ERR_PTR(-ENOMEM); |
| 453 | goto error1; |
| 454 | } |
| 455 | |
| 456 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
| 458 | mad_snoop_priv->agent.device = device; |
| 459 | mad_snoop_priv->agent.recv_handler = recv_handler; |
| 460 | mad_snoop_priv->agent.snoop_handler = snoop_handler; |
| 461 | mad_snoop_priv->agent.context = context; |
| 462 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 463 | mad_snoop_priv->agent.port_num = port_num; |
| 464 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; |
| 465 | init_waitqueue_head(&mad_snoop_priv->wait); |
| 466 | mad_snoop_priv->snoop_index = register_snoop_agent( |
| 467 | &port_priv->qp_info[qpn], |
| 468 | mad_snoop_priv); |
| 469 | if (mad_snoop_priv->snoop_index < 0) { |
| 470 | ret = ERR_PTR(mad_snoop_priv->snoop_index); |
| 471 | goto error2; |
| 472 | } |
| 473 | |
| 474 | atomic_set(&mad_snoop_priv->refcount, 1); |
| 475 | return &mad_snoop_priv->agent; |
| 476 | |
| 477 | error2: |
| 478 | kfree(mad_snoop_priv); |
| 479 | error1: |
| 480 | return ret; |
| 481 | } |
| 482 | EXPORT_SYMBOL(ib_register_mad_snoop); |
| 483 | |
| 484 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| 485 | { |
| 486 | struct ib_mad_port_private *port_priv; |
| 487 | unsigned long flags; |
| 488 | |
| 489 | /* Note that we could still be handling received MADs */ |
| 490 | |
| 491 | /* |
| 492 | * Canceling all sends results in dropping received response |
| 493 | * MADs, preventing us from queuing additional work |
| 494 | */ |
| 495 | cancel_mads(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | port_priv = mad_agent_priv->qp_info->port_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
| 499 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 500 | remove_mad_reg_req(mad_agent_priv); |
| 501 | list_del(&mad_agent_priv->agent_list); |
| 502 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 503 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 504 | flush_workqueue(port_priv->wq); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 505 | ib_cancel_rmpp_recvs(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | atomic_dec(&mad_agent_priv->refcount); |
| 508 | wait_event(mad_agent_priv->wait, |
| 509 | !atomic_read(&mad_agent_priv->refcount)); |
| 510 | |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 511 | kfree(mad_agent_priv->reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 512 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | kfree(mad_agent_priv); |
| 514 | } |
| 515 | |
| 516 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) |
| 517 | { |
| 518 | struct ib_mad_qp_info *qp_info; |
| 519 | unsigned long flags; |
| 520 | |
| 521 | qp_info = mad_snoop_priv->qp_info; |
| 522 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 523 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; |
| 524 | atomic_dec(&qp_info->snoop_count); |
| 525 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 526 | |
| 527 | atomic_dec(&mad_snoop_priv->refcount); |
| 528 | wait_event(mad_snoop_priv->wait, |
| 529 | !atomic_read(&mad_snoop_priv->refcount)); |
| 530 | |
| 531 | kfree(mad_snoop_priv); |
| 532 | } |
| 533 | |
| 534 | /* |
| 535 | * ib_unregister_mad_agent - Unregisters a client from using MAD services |
| 536 | */ |
| 537 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
| 538 | { |
| 539 | struct ib_mad_agent_private *mad_agent_priv; |
| 540 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 541 | |
| 542 | /* If the TID is zero, the agent can only snoop. */ |
| 543 | if (mad_agent->hi_tid) { |
| 544 | mad_agent_priv = container_of(mad_agent, |
| 545 | struct ib_mad_agent_private, |
| 546 | agent); |
| 547 | unregister_mad_agent(mad_agent_priv); |
| 548 | } else { |
| 549 | mad_snoop_priv = container_of(mad_agent, |
| 550 | struct ib_mad_snoop_private, |
| 551 | agent); |
| 552 | unregister_mad_snoop(mad_snoop_priv); |
| 553 | } |
| 554 | return 0; |
| 555 | } |
| 556 | EXPORT_SYMBOL(ib_unregister_mad_agent); |
| 557 | |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 558 | static inline int response_mad(struct ib_mad *mad) |
| 559 | { |
| 560 | /* Trap represses are responses although response bit is reset */ |
| 561 | return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || |
| 562 | (mad->mad_hdr.method & IB_MGMT_METHOD_RESP)); |
| 563 | } |
| 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
| 566 | { |
| 567 | struct ib_mad_queue *mad_queue; |
| 568 | unsigned long flags; |
| 569 | |
| 570 | BUG_ON(!mad_list->mad_queue); |
| 571 | mad_queue = mad_list->mad_queue; |
| 572 | spin_lock_irqsave(&mad_queue->lock, flags); |
| 573 | list_del(&mad_list->list); |
| 574 | mad_queue->count--; |
| 575 | spin_unlock_irqrestore(&mad_queue->lock, flags); |
| 576 | } |
| 577 | |
| 578 | static void snoop_send(struct ib_mad_qp_info *qp_info, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 579 | struct ib_mad_send_buf *send_buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | struct ib_mad_send_wc *mad_send_wc, |
| 581 | int mad_snoop_flags) |
| 582 | { |
| 583 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 584 | unsigned long flags; |
| 585 | int i; |
| 586 | |
| 587 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 588 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 589 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 590 | if (!mad_snoop_priv || |
| 591 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 592 | continue; |
| 593 | |
| 594 | atomic_inc(&mad_snoop_priv->refcount); |
| 595 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 596 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 597 | send_buf, mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
| 599 | wake_up(&mad_snoop_priv->wait); |
| 600 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 601 | } |
| 602 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 603 | } |
| 604 | |
| 605 | static void snoop_recv(struct ib_mad_qp_info *qp_info, |
| 606 | struct ib_mad_recv_wc *mad_recv_wc, |
| 607 | int mad_snoop_flags) |
| 608 | { |
| 609 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 610 | unsigned long flags; |
| 611 | int i; |
| 612 | |
| 613 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 614 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 615 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 616 | if (!mad_snoop_priv || |
| 617 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 618 | continue; |
| 619 | |
| 620 | atomic_inc(&mad_snoop_priv->refcount); |
| 621 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 622 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, |
| 623 | mad_recv_wc); |
| 624 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
| 625 | wake_up(&mad_snoop_priv->wait); |
| 626 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 627 | } |
| 628 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 629 | } |
| 630 | |
| 631 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, |
| 632 | struct ib_wc *wc) |
| 633 | { |
| 634 | memset(wc, 0, sizeof *wc); |
| 635 | wc->wr_id = wr_id; |
| 636 | wc->status = IB_WC_SUCCESS; |
| 637 | wc->opcode = IB_WC_RECV; |
| 638 | wc->pkey_index = pkey_index; |
| 639 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); |
| 640 | wc->src_qp = IB_QP0; |
| 641 | wc->qp_num = IB_QP0; |
| 642 | wc->slid = slid; |
| 643 | wc->sl = 0; |
| 644 | wc->dlid_path_bits = 0; |
| 645 | wc->port_num = port_num; |
| 646 | } |
| 647 | |
| 648 | /* |
| 649 | * Return 0 if SMP is to be sent |
| 650 | * Return 1 if SMP was consumed locally (whether or not solicited) |
| 651 | * Return < 0 if error |
| 652 | */ |
| 653 | 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] | 654 | struct ib_mad_send_wr_private *mad_send_wr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 656 | int ret; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 657 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | unsigned long flags; |
| 659 | struct ib_mad_local_private *local; |
| 660 | struct ib_mad_private *mad_priv; |
| 661 | struct ib_mad_port_private *port_priv; |
| 662 | struct ib_mad_agent_private *recv_mad_agent = NULL; |
| 663 | struct ib_device *device = mad_agent_priv->agent.device; |
| 664 | u8 port_num = mad_agent_priv->agent.port_num; |
| 665 | struct ib_wc mad_wc; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 666 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Ralph Campbell | 8cf3f04 | 2006-02-03 14:28:48 -0800 | [diff] [blame] | 668 | /* |
| 669 | * Directed route handling starts if the initial LID routed part of |
| 670 | * a request or the ending LID routed part of a response is empty. |
| 671 | * If we are at the start of the LID routed part, don't update the |
| 672 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. |
| 673 | */ |
| 674 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == |
| 675 | IB_LID_PERMISSIVE && |
| 676 | !smi_handle_dr_smp_send(smp, device->node_type, port_num)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | ret = -EINVAL; |
| 678 | printk(KERN_ERR PFX "Invalid directed route\n"); |
| 679 | goto out; |
| 680 | } |
| 681 | /* Check to post send on QP or process locally */ |
Ralph Campbell | 5e9f71a | 2006-02-03 14:32:01 -0800 | [diff] [blame] | 682 | ret = smi_check_local_smp(smp, device); |
| 683 | if (!ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | goto out; |
| 685 | |
| 686 | local = kmalloc(sizeof *local, GFP_ATOMIC); |
| 687 | if (!local) { |
| 688 | ret = -ENOMEM; |
| 689 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); |
| 690 | goto out; |
| 691 | } |
| 692 | local->mad_priv = NULL; |
| 693 | local->recv_mad_agent = NULL; |
| 694 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); |
| 695 | if (!mad_priv) { |
| 696 | ret = -ENOMEM; |
| 697 | printk(KERN_ERR PFX "No memory for local response MAD\n"); |
| 698 | kfree(local); |
| 699 | goto out; |
| 700 | } |
| 701 | |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 702 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
| 703 | send_wr->wr.ud.pkey_index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | send_wr->wr.ud.port_num, &mad_wc); |
| 705 | |
| 706 | /* No GRH for DR SMP */ |
| 707 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, |
| 708 | (struct ib_mad *)smp, |
| 709 | (struct ib_mad *)&mad_priv->mad); |
| 710 | switch (ret) |
| 711 | { |
| 712 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 713 | if (response_mad(&mad_priv->mad.mad) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | mad_agent_priv->agent.recv_handler) { |
| 715 | local->mad_priv = mad_priv; |
| 716 | local->recv_mad_agent = mad_agent_priv; |
| 717 | /* |
| 718 | * Reference MAD agent until receive |
| 719 | * side of local completion handled |
| 720 | */ |
| 721 | atomic_inc(&mad_agent_priv->refcount); |
| 722 | } else |
| 723 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 724 | break; |
| 725 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: |
| 726 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 727 | break; |
| 728 | case IB_MAD_RESULT_SUCCESS: |
| 729 | /* Treat like an incoming receive MAD */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
| 731 | mad_agent_priv->agent.port_num); |
| 732 | if (port_priv) { |
| 733 | mad_priv->mad.mad.mad_hdr.tid = |
| 734 | ((struct ib_mad *)smp)->mad_hdr.tid; |
| 735 | recv_mad_agent = find_mad_agent(port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 736 | &mad_priv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | } |
| 738 | if (!port_priv || !recv_mad_agent) { |
| 739 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 740 | kfree(local); |
| 741 | ret = 0; |
| 742 | goto out; |
| 743 | } |
| 744 | local->mad_priv = mad_priv; |
| 745 | local->recv_mad_agent = recv_mad_agent; |
| 746 | break; |
| 747 | default: |
| 748 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 749 | kfree(local); |
| 750 | ret = -EINVAL; |
| 751 | goto out; |
| 752 | } |
| 753 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 754 | local->mad_send_wr = mad_send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | /* Reference MAD agent until send side of local completion handled */ |
| 756 | atomic_inc(&mad_agent_priv->refcount); |
| 757 | /* Queue local completion to local list */ |
| 758 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 759 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); |
| 760 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 761 | queue_work(mad_agent_priv->qp_info->port_priv->wq, |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 762 | &mad_agent_priv->local_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | ret = 1; |
| 764 | out: |
| 765 | return ret; |
| 766 | } |
| 767 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 768 | static int get_pad_size(int hdr_len, int data_len) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 769 | { |
| 770 | int seg_size, pad; |
| 771 | |
| 772 | seg_size = sizeof(struct ib_mad) - hdr_len; |
| 773 | if (data_len && seg_size) { |
| 774 | pad = seg_size - data_len % seg_size; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 775 | return pad == seg_size ? 0 : pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 776 | } else |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 777 | return seg_size; |
| 778 | } |
| 779 | |
| 780 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) |
| 781 | { |
| 782 | struct ib_rmpp_segment *s, *t; |
| 783 | |
| 784 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { |
| 785 | list_del(&s->list); |
| 786 | kfree(s); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, |
| 791 | gfp_t gfp_mask) |
| 792 | { |
| 793 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; |
| 794 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; |
| 795 | struct ib_rmpp_segment *seg = NULL; |
| 796 | int left, seg_size, pad; |
| 797 | |
| 798 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; |
| 799 | seg_size = send_buf->seg_size; |
| 800 | pad = send_wr->pad; |
| 801 | |
| 802 | /* Allocate data segments. */ |
| 803 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { |
| 804 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); |
| 805 | if (!seg) { |
| 806 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " |
| 807 | "alloc failed for len %zd, gfp %#x\n", |
| 808 | sizeof (*seg) + seg_size, gfp_mask); |
| 809 | free_send_rmpp_list(send_wr); |
| 810 | return -ENOMEM; |
| 811 | } |
| 812 | seg->num = ++send_buf->seg_count; |
| 813 | list_add_tail(&seg->list, &send_wr->rmpp_list); |
| 814 | } |
| 815 | |
| 816 | /* Zero any padding */ |
| 817 | if (pad) |
| 818 | memset(seg->data + seg_size - pad, 0, pad); |
| 819 | |
| 820 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> |
| 821 | agent.rmpp_version; |
| 822 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; |
| 823 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| 824 | |
| 825 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, |
| 826 | struct ib_rmpp_segment, list); |
| 827 | send_wr->last_ack_seg = send_wr->cur_seg; |
| 828 | return 0; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
| 832 | u32 remote_qpn, u16 pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 833 | int rmpp_active, |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 834 | int hdr_len, int data_len, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 835 | gfp_t gfp_mask) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 836 | { |
| 837 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 838 | struct ib_mad_send_wr_private *mad_send_wr; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 839 | int pad, message_size, ret, size; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 840 | void *buf; |
| 841 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 842 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 843 | agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 844 | pad = get_pad_size(hdr_len, data_len); |
| 845 | message_size = hdr_len + data_len + pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 846 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 847 | if ((!mad_agent->rmpp_version && |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 848 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
| 849 | (!rmpp_active && message_size > sizeof(struct ib_mad))) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 850 | return ERR_PTR(-EINVAL); |
| 851 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 852 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
| 853 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 854 | if (!buf) |
| 855 | return ERR_PTR(-ENOMEM); |
| 856 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 857 | mad_send_wr = buf + size; |
| 858 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 859 | mad_send_wr->send_buf.mad = buf; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 860 | mad_send_wr->send_buf.hdr_len = hdr_len; |
| 861 | mad_send_wr->send_buf.data_len = data_len; |
| 862 | mad_send_wr->pad = pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 863 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 864 | mad_send_wr->mad_agent_priv = mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 865 | mad_send_wr->sg_list[0].length = hdr_len; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 866 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 867 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
| 868 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 869 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 870 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; |
| 871 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 872 | mad_send_wr->send_wr.num_sge = 2; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 873 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
| 874 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; |
| 875 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; |
| 876 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; |
| 877 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 878 | |
| 879 | if (rmpp_active) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 880 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
| 881 | if (ret) { |
| 882 | kfree(buf); |
| 883 | return ERR_PTR(ret); |
| 884 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 885 | } |
| 886 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 887 | mad_send_wr->send_buf.mad_agent = mad_agent; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 888 | atomic_inc(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 889 | return &mad_send_wr->send_buf; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 890 | } |
| 891 | EXPORT_SYMBOL(ib_create_send_mad); |
| 892 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 893 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
| 894 | { |
| 895 | struct ib_mad_send_wr_private *mad_send_wr; |
| 896 | struct list_head *list; |
| 897 | |
| 898 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 899 | send_buf); |
| 900 | list = &mad_send_wr->cur_seg->list; |
| 901 | |
| 902 | if (mad_send_wr->cur_seg->num < seg_num) { |
| 903 | list_for_each_entry(mad_send_wr->cur_seg, list, list) |
| 904 | if (mad_send_wr->cur_seg->num == seg_num) |
| 905 | break; |
| 906 | } else if (mad_send_wr->cur_seg->num > seg_num) { |
| 907 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) |
| 908 | if (mad_send_wr->cur_seg->num == seg_num) |
| 909 | break; |
| 910 | } |
| 911 | return mad_send_wr->cur_seg->data; |
| 912 | } |
| 913 | EXPORT_SYMBOL(ib_get_rmpp_segment); |
| 914 | |
| 915 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) |
| 916 | { |
| 917 | if (mad_send_wr->send_buf.seg_count) |
| 918 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, |
| 919 | mad_send_wr->seg_num); |
| 920 | else |
| 921 | return mad_send_wr->send_buf.mad + |
| 922 | mad_send_wr->send_buf.hdr_len; |
| 923 | } |
| 924 | |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 925 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
| 926 | { |
| 927 | struct ib_mad_agent_private *mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 928 | struct ib_mad_send_wr_private *mad_send_wr; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 929 | |
| 930 | mad_agent_priv = container_of(send_buf->mad_agent, |
| 931 | struct ib_mad_agent_private, agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 932 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 933 | send_buf); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 934 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 935 | free_send_rmpp_list(mad_send_wr); |
| 936 | kfree(send_buf->mad); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 937 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 938 | wake_up(&mad_agent_priv->wait); |
| 939 | } |
| 940 | EXPORT_SYMBOL(ib_free_send_mad); |
| 941 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 942 | 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] | 943 | { |
| 944 | struct ib_mad_qp_info *qp_info; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 945 | struct list_head *list; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 946 | struct ib_send_wr *bad_send_wr; |
| 947 | struct ib_mad_agent *mad_agent; |
| 948 | struct ib_sge *sge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | unsigned long flags; |
| 950 | int ret; |
| 951 | |
Hal Rosenstock | f8197a4 | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 952 | /* Set WR ID to find mad_send_wr upon completion */ |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 953 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
| 955 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
| 956 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 957 | mad_agent = mad_send_wr->send_buf.mad_agent; |
| 958 | sge = mad_send_wr->sg_list; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 959 | sge[0].addr = dma_map_single(mad_agent->device->dma_device, |
| 960 | mad_send_wr->send_buf.mad, |
| 961 | sge[0].length, |
| 962 | DMA_TO_DEVICE); |
| 963 | pci_unmap_addr_set(mad_send_wr, header_mapping, sge[0].addr); |
| 964 | |
| 965 | sge[1].addr = dma_map_single(mad_agent->device->dma_device, |
| 966 | ib_get_payload(mad_send_wr), |
| 967 | sge[1].length, |
| 968 | DMA_TO_DEVICE); |
| 969 | pci_unmap_addr_set(mad_send_wr, payload_mapping, sge[1].addr); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 972 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 973 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
| 974 | &bad_send_wr); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 975 | list = &qp_info->send_queue.list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | ret = 0; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 978 | list = &qp_info->overflow_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | } |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 980 | |
| 981 | if (!ret) { |
| 982 | qp_info->send_queue.count++; |
| 983 | list_add_tail(&mad_send_wr->mad_list.list, list); |
| 984 | } |
| 985 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 986 | if (ret) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 987 | dma_unmap_single(mad_agent->device->dma_device, |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 988 | pci_unmap_addr(mad_send_wr, header_mapping), |
| 989 | sge[0].length, DMA_TO_DEVICE); |
| 990 | dma_unmap_single(mad_agent->device->dma_device, |
| 991 | pci_unmap_addr(mad_send_wr, payload_mapping), |
| 992 | sge[1].length, DMA_TO_DEVICE); |
| 993 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | /* |
| 998 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated |
| 999 | * with the registered client |
| 1000 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1001 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
| 1002 | struct ib_mad_send_buf **bad_send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1005 | struct ib_mad_send_buf *next_send_buf; |
| 1006 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1007 | unsigned long flags; |
| 1008 | int ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | /* Walk list of send WRs and post each on send list */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1011 | for (; send_buf; send_buf = next_send_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1013 | mad_send_wr = container_of(send_buf, |
| 1014 | struct ib_mad_send_wr_private, |
| 1015 | send_buf); |
| 1016 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1018 | if (!send_buf->mad_agent->send_handler || |
| 1019 | (send_buf->timeout_ms && |
| 1020 | !send_buf->mad_agent->recv_handler)) { |
| 1021 | ret = -EINVAL; |
| 1022 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * Save pointer to next work request to post in case the |
| 1027 | * current one completes, and the user modifies the work |
| 1028 | * request associated with the completion |
| 1029 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1030 | next_send_buf = send_buf->next; |
| 1031 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1033 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
| 1034 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| 1035 | ret = handle_outgoing_dr_smp(mad_agent_priv, |
| 1036 | mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | if (ret < 0) /* error */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1038 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | else if (ret == 1) /* locally consumed */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1040 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1043 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | /* Timeout will be updated after send completes */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1045 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
| 1046 | mad_send_wr->retries = send_buf->retries; |
| 1047 | /* Reference for work request to QP + response */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
| 1049 | mad_send_wr->status = IB_WC_SUCCESS; |
| 1050 | |
| 1051 | /* Reference MAD agent until send completes */ |
| 1052 | atomic_inc(&mad_agent_priv->refcount); |
| 1053 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1054 | list_add_tail(&mad_send_wr->agent_list, |
| 1055 | &mad_agent_priv->send_list); |
| 1056 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1057 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1058 | if (mad_agent_priv->agent.rmpp_version) { |
| 1059 | ret = ib_send_rmpp_mad(mad_send_wr); |
| 1060 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) |
| 1061 | ret = ib_send_mad(mad_send_wr); |
| 1062 | } else |
| 1063 | ret = ib_send_mad(mad_send_wr); |
| 1064 | if (ret < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | /* Fail send request */ |
| 1066 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1067 | list_del(&mad_send_wr->agent_list); |
| 1068 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1069 | atomic_dec(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1070 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | } |
| 1073 | return 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1074 | error: |
| 1075 | if (bad_send_buf) |
| 1076 | *bad_send_buf = send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | return ret; |
| 1078 | } |
| 1079 | EXPORT_SYMBOL(ib_post_send_mad); |
| 1080 | |
| 1081 | /* |
| 1082 | * ib_free_recv_mad - Returns data buffers used to receive |
| 1083 | * a MAD to the access layer |
| 1084 | */ |
| 1085 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) |
| 1086 | { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1087 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | struct ib_mad_private_header *mad_priv_hdr; |
| 1089 | struct ib_mad_private *priv; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1090 | struct list_head free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1092 | INIT_LIST_HEAD(&free_list); |
| 1093 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1095 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
| 1096 | &free_list, list) { |
| 1097 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, |
| 1098 | recv_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | mad_priv_hdr = container_of(mad_recv_wc, |
| 1100 | struct ib_mad_private_header, |
| 1101 | recv_wc); |
| 1102 | priv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 1103 | header); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1104 | kmem_cache_free(ib_mad_cache, priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | } |
| 1107 | EXPORT_SYMBOL(ib_free_recv_mad); |
| 1108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
| 1110 | u8 rmpp_version, |
| 1111 | ib_mad_send_handler send_handler, |
| 1112 | ib_mad_recv_handler recv_handler, |
| 1113 | void *context) |
| 1114 | { |
| 1115 | return ERR_PTR(-EINVAL); /* XXX: for now */ |
| 1116 | } |
| 1117 | EXPORT_SYMBOL(ib_redirect_mad_qp); |
| 1118 | |
| 1119 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, |
| 1120 | struct ib_wc *wc) |
| 1121 | { |
| 1122 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); |
| 1123 | return 0; |
| 1124 | } |
| 1125 | EXPORT_SYMBOL(ib_process_mad_wc); |
| 1126 | |
| 1127 | static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| 1128 | struct ib_mad_reg_req *mad_reg_req) |
| 1129 | { |
| 1130 | int i; |
| 1131 | |
| 1132 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); |
| 1133 | i < IB_MGMT_MAX_METHODS; |
| 1134 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1135 | 1+i)) { |
| 1136 | if ((*method)->agent[i]) { |
| 1137 | printk(KERN_ERR PFX "Method %d already in use\n", i); |
| 1138 | return -EINVAL; |
| 1139 | } |
| 1140 | } |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) |
| 1145 | { |
| 1146 | /* Allocate management method table */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1147 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | if (!*method) { |
| 1149 | printk(KERN_ERR PFX "No memory for " |
| 1150 | "ib_mad_mgmt_method_table\n"); |
| 1151 | return -ENOMEM; |
| 1152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
| 1154 | return 0; |
| 1155 | } |
| 1156 | |
| 1157 | /* |
| 1158 | * Check to see if there are any methods still in use |
| 1159 | */ |
| 1160 | static int check_method_table(struct ib_mad_mgmt_method_table *method) |
| 1161 | { |
| 1162 | int i; |
| 1163 | |
| 1164 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) |
| 1165 | if (method->agent[i]) |
| 1166 | return 1; |
| 1167 | return 0; |
| 1168 | } |
| 1169 | |
| 1170 | /* |
| 1171 | * Check to see if there are any method tables for this class still in use |
| 1172 | */ |
| 1173 | static int check_class_table(struct ib_mad_mgmt_class_table *class) |
| 1174 | { |
| 1175 | int i; |
| 1176 | |
| 1177 | for (i = 0; i < MAX_MGMT_CLASS; i++) |
| 1178 | if (class->method_table[i]) |
| 1179 | return 1; |
| 1180 | return 0; |
| 1181 | } |
| 1182 | |
| 1183 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) |
| 1184 | { |
| 1185 | int i; |
| 1186 | |
| 1187 | for (i = 0; i < MAX_MGMT_OUI; i++) |
| 1188 | if (vendor_class->method_table[i]) |
| 1189 | return 1; |
| 1190 | return 0; |
| 1191 | } |
| 1192 | |
| 1193 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, |
| 1194 | char *oui) |
| 1195 | { |
| 1196 | int i; |
| 1197 | |
| 1198 | for (i = 0; i < MAX_MGMT_OUI; i++) |
| 1199 | /* Is there matching OUI for this vendor class ? */ |
| 1200 | if (!memcmp(vendor_class->oui[i], oui, 3)) |
| 1201 | return i; |
| 1202 | |
| 1203 | return -1; |
| 1204 | } |
| 1205 | |
| 1206 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) |
| 1207 | { |
| 1208 | int i; |
| 1209 | |
| 1210 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) |
| 1211 | if (vendor->vendor_class[i]) |
| 1212 | return 1; |
| 1213 | |
| 1214 | return 0; |
| 1215 | } |
| 1216 | |
| 1217 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, |
| 1218 | struct ib_mad_agent_private *agent) |
| 1219 | { |
| 1220 | int i; |
| 1221 | |
| 1222 | /* Remove any methods for this mad agent */ |
| 1223 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { |
| 1224 | if (method->agent[i] == agent) { |
| 1225 | method->agent[i] = NULL; |
| 1226 | } |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1231 | struct ib_mad_agent_private *agent_priv, |
| 1232 | u8 mgmt_class) |
| 1233 | { |
| 1234 | struct ib_mad_port_private *port_priv; |
| 1235 | struct ib_mad_mgmt_class_table **class; |
| 1236 | struct ib_mad_mgmt_method_table **method; |
| 1237 | int i, ret; |
| 1238 | |
| 1239 | port_priv = agent_priv->qp_info->port_priv; |
| 1240 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; |
| 1241 | if (!*class) { |
| 1242 | /* Allocate management class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1243 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | if (!*class) { |
| 1245 | printk(KERN_ERR PFX "No memory for " |
| 1246 | "ib_mad_mgmt_class_table\n"); |
| 1247 | ret = -ENOMEM; |
| 1248 | goto error1; |
| 1249 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | /* Allocate method table for this management class */ |
| 1252 | method = &(*class)->method_table[mgmt_class]; |
| 1253 | if ((ret = allocate_method_table(method))) |
| 1254 | goto error2; |
| 1255 | } else { |
| 1256 | method = &(*class)->method_table[mgmt_class]; |
| 1257 | if (!*method) { |
| 1258 | /* Allocate method table for this management class */ |
| 1259 | if ((ret = allocate_method_table(method))) |
| 1260 | goto error1; |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | /* Now, make sure methods are not already in use */ |
| 1265 | if (method_in_use(method, mad_reg_req)) |
| 1266 | goto error3; |
| 1267 | |
| 1268 | /* Finally, add in methods being registered */ |
| 1269 | for (i = find_first_bit(mad_reg_req->method_mask, |
| 1270 | IB_MGMT_MAX_METHODS); |
| 1271 | i < IB_MGMT_MAX_METHODS; |
| 1272 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1273 | 1+i)) { |
| 1274 | (*method)->agent[i] = agent_priv; |
| 1275 | } |
| 1276 | return 0; |
| 1277 | |
| 1278 | error3: |
| 1279 | /* Remove any methods for this mad agent */ |
| 1280 | remove_methods_mad_agent(*method, agent_priv); |
| 1281 | /* Now, check to see if there are any methods in use */ |
| 1282 | if (!check_method_table(*method)) { |
| 1283 | /* If not, release management method table */ |
| 1284 | kfree(*method); |
| 1285 | *method = NULL; |
| 1286 | } |
| 1287 | ret = -EINVAL; |
| 1288 | goto error1; |
| 1289 | error2: |
| 1290 | kfree(*class); |
| 1291 | *class = NULL; |
| 1292 | error1: |
| 1293 | return ret; |
| 1294 | } |
| 1295 | |
| 1296 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1297 | struct ib_mad_agent_private *agent_priv) |
| 1298 | { |
| 1299 | struct ib_mad_port_private *port_priv; |
| 1300 | struct ib_mad_mgmt_vendor_class_table **vendor_table; |
| 1301 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; |
| 1302 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; |
| 1303 | struct ib_mad_mgmt_method_table **method; |
| 1304 | int i, ret = -ENOMEM; |
| 1305 | u8 vclass; |
| 1306 | |
| 1307 | /* "New" vendor (with OUI) class */ |
| 1308 | vclass = vendor_class_index(mad_reg_req->mgmt_class); |
| 1309 | port_priv = agent_priv->qp_info->port_priv; |
| 1310 | vendor_table = &port_priv->version[ |
| 1311 | mad_reg_req->mgmt_class_version].vendor; |
| 1312 | if (!*vendor_table) { |
| 1313 | /* Allocate mgmt vendor class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1314 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | if (!vendor) { |
| 1316 | printk(KERN_ERR PFX "No memory for " |
| 1317 | "ib_mad_mgmt_vendor_class_table\n"); |
| 1318 | goto error1; |
| 1319 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | *vendor_table = vendor; |
| 1322 | } |
| 1323 | if (!(*vendor_table)->vendor_class[vclass]) { |
| 1324 | /* Allocate table for this management vendor class */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1325 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | if (!vendor_class) { |
| 1327 | printk(KERN_ERR PFX "No memory for " |
| 1328 | "ib_mad_mgmt_vendor_class\n"); |
| 1329 | goto error2; |
| 1330 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
| 1333 | } |
| 1334 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1335 | /* Is there matching OUI for this vendor class ? */ |
| 1336 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1337 | mad_reg_req->oui, 3)) { |
| 1338 | method = &(*vendor_table)->vendor_class[ |
| 1339 | vclass]->method_table[i]; |
| 1340 | BUG_ON(!*method); |
| 1341 | goto check_in_use; |
| 1342 | } |
| 1343 | } |
| 1344 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1345 | /* OUI slot available ? */ |
| 1346 | if (!is_vendor_oui((*vendor_table)->vendor_class[ |
| 1347 | vclass]->oui[i])) { |
| 1348 | method = &(*vendor_table)->vendor_class[ |
| 1349 | vclass]->method_table[i]; |
| 1350 | BUG_ON(*method); |
| 1351 | /* Allocate method table for this OUI */ |
| 1352 | if ((ret = allocate_method_table(method))) |
| 1353 | goto error3; |
| 1354 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1355 | mad_reg_req->oui, 3); |
| 1356 | goto check_in_use; |
| 1357 | } |
| 1358 | } |
| 1359 | printk(KERN_ERR PFX "All OUI slots in use\n"); |
| 1360 | goto error3; |
| 1361 | |
| 1362 | check_in_use: |
| 1363 | /* Now, make sure methods are not already in use */ |
| 1364 | if (method_in_use(method, mad_reg_req)) |
| 1365 | goto error4; |
| 1366 | |
| 1367 | /* Finally, add in methods being registered */ |
| 1368 | for (i = find_first_bit(mad_reg_req->method_mask, |
| 1369 | IB_MGMT_MAX_METHODS); |
| 1370 | i < IB_MGMT_MAX_METHODS; |
| 1371 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, |
| 1372 | 1+i)) { |
| 1373 | (*method)->agent[i] = agent_priv; |
| 1374 | } |
| 1375 | return 0; |
| 1376 | |
| 1377 | error4: |
| 1378 | /* Remove any methods for this mad agent */ |
| 1379 | remove_methods_mad_agent(*method, agent_priv); |
| 1380 | /* Now, check to see if there are any methods in use */ |
| 1381 | if (!check_method_table(*method)) { |
| 1382 | /* If not, release management method table */ |
| 1383 | kfree(*method); |
| 1384 | *method = NULL; |
| 1385 | } |
| 1386 | ret = -EINVAL; |
| 1387 | error3: |
| 1388 | if (vendor_class) { |
| 1389 | (*vendor_table)->vendor_class[vclass] = NULL; |
| 1390 | kfree(vendor_class); |
| 1391 | } |
| 1392 | error2: |
| 1393 | if (vendor) { |
| 1394 | *vendor_table = NULL; |
| 1395 | kfree(vendor); |
| 1396 | } |
| 1397 | error1: |
| 1398 | return ret; |
| 1399 | } |
| 1400 | |
| 1401 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) |
| 1402 | { |
| 1403 | struct ib_mad_port_private *port_priv; |
| 1404 | struct ib_mad_mgmt_class_table *class; |
| 1405 | struct ib_mad_mgmt_method_table *method; |
| 1406 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1407 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1408 | int index; |
| 1409 | u8 mgmt_class; |
| 1410 | |
| 1411 | /* |
| 1412 | * Was MAD registration request supplied |
| 1413 | * with original registration ? |
| 1414 | */ |
| 1415 | if (!agent_priv->reg_req) { |
| 1416 | goto out; |
| 1417 | } |
| 1418 | |
| 1419 | port_priv = agent_priv->qp_info->port_priv; |
| 1420 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); |
| 1421 | class = port_priv->version[ |
| 1422 | agent_priv->reg_req->mgmt_class_version].class; |
| 1423 | if (!class) |
| 1424 | goto vendor_check; |
| 1425 | |
| 1426 | method = class->method_table[mgmt_class]; |
| 1427 | if (method) { |
| 1428 | /* Remove any methods for this mad agent */ |
| 1429 | remove_methods_mad_agent(method, agent_priv); |
| 1430 | /* Now, check to see if there are any methods still in use */ |
| 1431 | if (!check_method_table(method)) { |
| 1432 | /* If not, release management method table */ |
| 1433 | kfree(method); |
| 1434 | class->method_table[mgmt_class] = NULL; |
| 1435 | /* Any management classes left ? */ |
| 1436 | if (!check_class_table(class)) { |
| 1437 | /* If not, release management class table */ |
| 1438 | kfree(class); |
| 1439 | port_priv->version[ |
| 1440 | agent_priv->reg_req-> |
| 1441 | mgmt_class_version].class = NULL; |
| 1442 | } |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | vendor_check: |
| 1447 | if (!is_vendor_class(mgmt_class)) |
| 1448 | goto out; |
| 1449 | |
| 1450 | /* normalize mgmt_class to vendor range 2 */ |
| 1451 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); |
| 1452 | vendor = port_priv->version[ |
| 1453 | agent_priv->reg_req->mgmt_class_version].vendor; |
| 1454 | |
| 1455 | if (!vendor) |
| 1456 | goto out; |
| 1457 | |
| 1458 | vendor_class = vendor->vendor_class[mgmt_class]; |
| 1459 | if (vendor_class) { |
| 1460 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); |
| 1461 | if (index < 0) |
| 1462 | goto out; |
| 1463 | method = vendor_class->method_table[index]; |
| 1464 | if (method) { |
| 1465 | /* Remove any methods for this mad agent */ |
| 1466 | remove_methods_mad_agent(method, agent_priv); |
| 1467 | /* |
| 1468 | * Now, check to see if there are |
| 1469 | * any methods still in use |
| 1470 | */ |
| 1471 | if (!check_method_table(method)) { |
| 1472 | /* If not, release management method table */ |
| 1473 | kfree(method); |
| 1474 | vendor_class->method_table[index] = NULL; |
| 1475 | memset(vendor_class->oui[index], 0, 3); |
| 1476 | /* Any OUIs left ? */ |
| 1477 | if (!check_vendor_class(vendor_class)) { |
| 1478 | /* If not, release vendor class table */ |
| 1479 | kfree(vendor_class); |
| 1480 | vendor->vendor_class[mgmt_class] = NULL; |
| 1481 | /* Any other vendor classes left ? */ |
| 1482 | if (!check_vendor_table(vendor)) { |
| 1483 | kfree(vendor); |
| 1484 | port_priv->version[ |
| 1485 | agent_priv->reg_req-> |
| 1486 | mgmt_class_version]. |
| 1487 | vendor = NULL; |
| 1488 | } |
| 1489 | } |
| 1490 | } |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | out: |
| 1495 | return; |
| 1496 | } |
| 1497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | static struct ib_mad_agent_private * |
| 1499 | find_mad_agent(struct ib_mad_port_private *port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1500 | struct ib_mad *mad) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | { |
| 1502 | struct ib_mad_agent_private *mad_agent = NULL; |
| 1503 | unsigned long flags; |
| 1504 | |
| 1505 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1506 | if (response_mad(mad)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | u32 hi_tid; |
| 1508 | struct ib_mad_agent_private *entry; |
| 1509 | |
| 1510 | /* |
| 1511 | * Routing is based on high 32 bits of transaction ID |
| 1512 | * of MAD. |
| 1513 | */ |
| 1514 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1515 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | if (entry->agent.hi_tid == hi_tid) { |
| 1517 | mad_agent = entry; |
| 1518 | break; |
| 1519 | } |
| 1520 | } |
| 1521 | } else { |
| 1522 | struct ib_mad_mgmt_class_table *class; |
| 1523 | struct ib_mad_mgmt_method_table *method; |
| 1524 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1525 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1526 | struct ib_vendor_mad *vendor_mad; |
| 1527 | int index; |
| 1528 | |
| 1529 | /* |
| 1530 | * Routing is based on version, class, and method |
| 1531 | * For "newer" vendor MADs, also based on OUI |
| 1532 | */ |
| 1533 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) |
| 1534 | goto out; |
| 1535 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { |
| 1536 | class = port_priv->version[ |
| 1537 | mad->mad_hdr.class_version].class; |
| 1538 | if (!class) |
| 1539 | goto out; |
| 1540 | method = class->method_table[convert_mgmt_class( |
| 1541 | mad->mad_hdr.mgmt_class)]; |
| 1542 | if (method) |
| 1543 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1544 | ~IB_MGMT_METHOD_RESP]; |
| 1545 | } else { |
| 1546 | vendor = port_priv->version[ |
| 1547 | mad->mad_hdr.class_version].vendor; |
| 1548 | if (!vendor) |
| 1549 | goto out; |
| 1550 | vendor_class = vendor->vendor_class[vendor_class_index( |
| 1551 | mad->mad_hdr.mgmt_class)]; |
| 1552 | if (!vendor_class) |
| 1553 | goto out; |
| 1554 | /* Find matching OUI */ |
| 1555 | vendor_mad = (struct ib_vendor_mad *)mad; |
| 1556 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
| 1557 | if (index == -1) |
| 1558 | goto out; |
| 1559 | method = vendor_class->method_table[index]; |
| 1560 | if (method) { |
| 1561 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1562 | ~IB_MGMT_METHOD_RESP]; |
| 1563 | } |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | if (mad_agent) { |
| 1568 | if (mad_agent->agent.recv_handler) |
| 1569 | atomic_inc(&mad_agent->refcount); |
| 1570 | else { |
| 1571 | printk(KERN_NOTICE PFX "No receive handler for client " |
| 1572 | "%p on port %d\n", |
| 1573 | &mad_agent->agent, port_priv->port_num); |
| 1574 | mad_agent = NULL; |
| 1575 | } |
| 1576 | } |
| 1577 | out: |
| 1578 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 1579 | |
| 1580 | return mad_agent; |
| 1581 | } |
| 1582 | |
| 1583 | static int validate_mad(struct ib_mad *mad, u32 qp_num) |
| 1584 | { |
| 1585 | int valid = 0; |
| 1586 | |
| 1587 | /* Make sure MAD base version is understood */ |
| 1588 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { |
| 1589 | printk(KERN_ERR PFX "MAD received with unsupported base " |
| 1590 | "version %d\n", mad->mad_hdr.base_version); |
| 1591 | goto out; |
| 1592 | } |
| 1593 | |
| 1594 | /* Filter SMI packets sent to other than QP0 */ |
| 1595 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 1596 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
| 1597 | if (qp_num == 0) |
| 1598 | valid = 1; |
| 1599 | } else { |
| 1600 | /* Filter GSI packets sent to QP0 */ |
| 1601 | if (qp_num != 0) |
| 1602 | valid = 1; |
| 1603 | } |
| 1604 | |
| 1605 | out: |
| 1606 | return valid; |
| 1607 | } |
| 1608 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1609 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
| 1610 | struct ib_mad_hdr *mad_hdr) |
| 1611 | { |
| 1612 | struct ib_rmpp_mad *rmpp_mad; |
| 1613 | |
| 1614 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; |
| 1615 | return !mad_agent_priv->agent.rmpp_version || |
| 1616 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 1617 | IB_MGMT_RMPP_FLAG_ACTIVE) || |
| 1618 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); |
| 1619 | } |
| 1620 | |
| 1621 | struct ib_mad_send_wr_private* |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1622 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, __be64 tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | { |
| 1624 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1625 | |
| 1626 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
| 1627 | agent_list) { |
| 1628 | if (mad_send_wr->tid == tid) |
| 1629 | return mad_send_wr; |
| 1630 | } |
| 1631 | |
| 1632 | /* |
| 1633 | * It's possible to receive the response before we've |
| 1634 | * been notified that the send has completed |
| 1635 | */ |
| 1636 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
| 1637 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1638 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1639 | mad_send_wr->tid == tid && mad_send_wr->timeout) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | /* Verify request has not been canceled */ |
| 1641 | return (mad_send_wr->status == IB_WC_SUCCESS) ? |
| 1642 | mad_send_wr : NULL; |
| 1643 | } |
| 1644 | } |
| 1645 | return NULL; |
| 1646 | } |
| 1647 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1648 | 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] | 1649 | { |
| 1650 | mad_send_wr->timeout = 0; |
| 1651 | if (mad_send_wr->refcount == 1) { |
| 1652 | list_del(&mad_send_wr->agent_list); |
| 1653 | list_add_tail(&mad_send_wr->agent_list, |
| 1654 | &mad_send_wr->mad_agent_priv->done_list); |
| 1655 | } |
| 1656 | } |
| 1657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | 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] | 1659 | struct ib_mad_recv_wc *mad_recv_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | { |
| 1661 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1662 | struct ib_mad_send_wc mad_send_wc; |
| 1663 | unsigned long flags; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 1664 | __be64 tid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1666 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
| 1667 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); |
| 1668 | if (mad_agent_priv->agent.rmpp_version) { |
| 1669 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
| 1670 | mad_recv_wc); |
| 1671 | if (!mad_recv_wc) { |
| 1672 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 1673 | wake_up(&mad_agent_priv->wait); |
| 1674 | return; |
| 1675 | } |
| 1676 | } |
| 1677 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | /* Complete corresponding request */ |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1679 | if (response_mad(mad_recv_wc->recv_buf.mad)) { |
| 1680 | tid = mad_recv_wc->recv_buf.mad->mad_hdr.tid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1682 | mad_send_wr = ib_find_send_mad(mad_agent_priv, tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | if (!mad_send_wr) { |
| 1684 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1685 | ib_free_recv_mad(mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 1687 | wake_up(&mad_agent_priv->wait); |
| 1688 | return; |
| 1689 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1690 | ib_mark_mad_done(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1692 | |
| 1693 | /* Defined behavior is to complete response before request */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1694 | 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] | 1695 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1696 | mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | atomic_dec(&mad_agent_priv->refcount); |
| 1698 | |
| 1699 | mad_send_wc.status = IB_WC_SUCCESS; |
| 1700 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1701 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
| 1703 | } else { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1704 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1705 | mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 1707 | wake_up(&mad_agent_priv->wait); |
| 1708 | } |
| 1709 | } |
| 1710 | |
| 1711 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, |
| 1712 | struct ib_wc *wc) |
| 1713 | { |
| 1714 | struct ib_mad_qp_info *qp_info; |
| 1715 | struct ib_mad_private_header *mad_priv_hdr; |
| 1716 | struct ib_mad_private *recv, *response; |
| 1717 | struct ib_mad_list_head *mad_list; |
| 1718 | struct ib_mad_agent_private *mad_agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | |
| 1720 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 1721 | if (!response) |
| 1722 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " |
| 1723 | "for response buffer\n"); |
| 1724 | |
| 1725 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 1726 | qp_info = mad_list->mad_queue->qp_info; |
| 1727 | dequeue_mad(mad_list); |
| 1728 | |
| 1729 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
| 1730 | mad_list); |
| 1731 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); |
| 1732 | dma_unmap_single(port_priv->device->dma_device, |
| 1733 | pci_unmap_addr(&recv->header, mapping), |
| 1734 | sizeof(struct ib_mad_private) - |
| 1735 | sizeof(struct ib_mad_private_header), |
| 1736 | DMA_FROM_DEVICE); |
| 1737 | |
| 1738 | /* Setup MAD receive work completion from "normal" work completion */ |
Sean Hefty | 24239af | 2005-04-16 15:26:08 -0700 | [diff] [blame] | 1739 | recv->header.wc = *wc; |
| 1740 | recv->header.recv_wc.wc = &recv->header.wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
| 1742 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; |
| 1743 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
| 1744 | |
| 1745 | if (atomic_read(&qp_info->snoop_count)) |
| 1746 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); |
| 1747 | |
| 1748 | /* Validate MAD */ |
| 1749 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) |
| 1750 | goto out; |
| 1751 | |
| 1752 | if (recv->mad.mad.mad_hdr.mgmt_class == |
| 1753 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| 1754 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, |
| 1755 | port_priv->device->node_type, |
| 1756 | port_priv->port_num, |
| 1757 | port_priv->device->phys_port_cnt)) |
| 1758 | goto out; |
| 1759 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) |
| 1760 | goto local; |
| 1761 | if (!smi_handle_dr_smp_send(&recv->mad.smp, |
| 1762 | port_priv->device->node_type, |
| 1763 | port_priv->port_num)) |
| 1764 | goto out; |
Ralph Campbell | 5e9f71a | 2006-02-03 14:32:01 -0800 | [diff] [blame] | 1765 | if (!smi_check_local_smp(&recv->mad.smp, port_priv->device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | goto out; |
| 1767 | } |
| 1768 | |
| 1769 | local: |
| 1770 | /* Give driver "right of first refusal" on incoming MAD */ |
| 1771 | if (port_priv->device->process_mad) { |
| 1772 | int ret; |
| 1773 | |
| 1774 | if (!response) { |
| 1775 | printk(KERN_ERR PFX "No memory for response MAD\n"); |
| 1776 | /* |
| 1777 | * Is it better to assume that |
| 1778 | * it wouldn't be processed ? |
| 1779 | */ |
| 1780 | goto out; |
| 1781 | } |
| 1782 | |
| 1783 | ret = port_priv->device->process_mad(port_priv->device, 0, |
| 1784 | port_priv->port_num, |
| 1785 | wc, &recv->grh, |
| 1786 | &recv->mad.mad, |
| 1787 | &response->mad.mad); |
| 1788 | if (ret & IB_MAD_RESULT_SUCCESS) { |
| 1789 | if (ret & IB_MAD_RESULT_CONSUMED) |
| 1790 | goto out; |
| 1791 | if (ret & IB_MAD_RESULT_REPLY) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1792 | agent_send_response(&response->mad.mad, |
| 1793 | &recv->grh, wc, |
| 1794 | port_priv->device, |
| 1795 | port_priv->port_num, |
| 1796 | qp_info->qp->qp_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | goto out; |
| 1798 | } |
| 1799 | } |
| 1800 | } |
| 1801 | |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1802 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | if (mad_agent) { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1804 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | /* |
| 1806 | * recv is freed up in error cases in ib_mad_complete_recv |
| 1807 | * or via recv_handler in ib_mad_complete_recv() |
| 1808 | */ |
| 1809 | recv = NULL; |
| 1810 | } |
| 1811 | |
| 1812 | out: |
| 1813 | /* Post another receive request for this QP */ |
| 1814 | if (response) { |
| 1815 | ib_mad_post_receive_mads(qp_info, response); |
| 1816 | if (recv) |
| 1817 | kmem_cache_free(ib_mad_cache, recv); |
| 1818 | } else |
| 1819 | ib_mad_post_receive_mads(qp_info, recv); |
| 1820 | } |
| 1821 | |
| 1822 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) |
| 1823 | { |
| 1824 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1825 | unsigned long delay; |
| 1826 | |
| 1827 | if (list_empty(&mad_agent_priv->wait_list)) { |
| 1828 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1829 | } else { |
| 1830 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 1831 | struct ib_mad_send_wr_private, |
| 1832 | agent_list); |
| 1833 | |
| 1834 | if (time_after(mad_agent_priv->timeout, |
| 1835 | mad_send_wr->timeout)) { |
| 1836 | mad_agent_priv->timeout = mad_send_wr->timeout; |
| 1837 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1838 | delay = mad_send_wr->timeout - jiffies; |
| 1839 | if ((long)delay <= 0) |
| 1840 | delay = 1; |
| 1841 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 1842 | port_priv->wq, |
| 1843 | &mad_agent_priv->timed_work, delay); |
| 1844 | } |
| 1845 | } |
| 1846 | } |
| 1847 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1848 | 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] | 1849 | { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1850 | struct ib_mad_agent_private *mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
| 1852 | struct list_head *list_item; |
| 1853 | unsigned long delay; |
| 1854 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1855 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | list_del(&mad_send_wr->agent_list); |
| 1857 | |
| 1858 | delay = mad_send_wr->timeout; |
| 1859 | mad_send_wr->timeout += jiffies; |
| 1860 | |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1861 | if (delay) { |
| 1862 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { |
| 1863 | temp_mad_send_wr = list_entry(list_item, |
| 1864 | struct ib_mad_send_wr_private, |
| 1865 | agent_list); |
| 1866 | if (time_after(mad_send_wr->timeout, |
| 1867 | temp_mad_send_wr->timeout)) |
| 1868 | break; |
| 1869 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | } |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1871 | else |
| 1872 | list_item = &mad_agent_priv->wait_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | list_add(&mad_send_wr->agent_list, list_item); |
| 1874 | |
| 1875 | /* Reschedule a work item if we have a shorter timeout */ |
| 1876 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { |
| 1877 | cancel_delayed_work(&mad_agent_priv->timed_work); |
| 1878 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
| 1879 | &mad_agent_priv->timed_work, delay); |
| 1880 | } |
| 1881 | } |
| 1882 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 1883 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
| 1884 | int timeout_ms) |
| 1885 | { |
| 1886 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 1887 | wait_for_response(mad_send_wr); |
| 1888 | } |
| 1889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | /* |
| 1891 | * Process a send work completion |
| 1892 | */ |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1893 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
| 1894 | struct ib_mad_send_wc *mad_send_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | { |
| 1896 | struct ib_mad_agent_private *mad_agent_priv; |
| 1897 | unsigned long flags; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1898 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1900 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1902 | if (mad_agent_priv->agent.rmpp_version) { |
| 1903 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
| 1904 | if (ret == IB_RMPP_RESULT_CONSUMED) |
| 1905 | goto done; |
| 1906 | } else |
| 1907 | ret = IB_RMPP_RESULT_UNHANDLED; |
| 1908 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | if (mad_send_wc->status != IB_WC_SUCCESS && |
| 1910 | mad_send_wr->status == IB_WC_SUCCESS) { |
| 1911 | mad_send_wr->status = mad_send_wc->status; |
| 1912 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 1913 | } |
| 1914 | |
| 1915 | if (--mad_send_wr->refcount > 0) { |
| 1916 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && |
| 1917 | mad_send_wr->status == IB_WC_SUCCESS) { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1918 | wait_for_response(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1920 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | } |
| 1922 | |
| 1923 | /* Remove send from MAD agent and notify client of completion */ |
| 1924 | list_del(&mad_send_wr->agent_list); |
| 1925 | adjust_timeout(mad_agent_priv); |
| 1926 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1927 | |
| 1928 | if (mad_send_wr->status != IB_WC_SUCCESS ) |
| 1929 | mad_send_wc->status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1930 | if (ret == IB_RMPP_RESULT_INTERNAL) |
| 1931 | ib_rmpp_send_handler(mad_send_wc); |
| 1932 | else |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1933 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 1934 | mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | |
| 1936 | /* Release reference on agent taken when sending */ |
| 1937 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 1938 | wake_up(&mad_agent_priv->wait); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1939 | return; |
| 1940 | done: |
| 1941 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | } |
| 1943 | |
| 1944 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, |
| 1945 | struct ib_wc *wc) |
| 1946 | { |
| 1947 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
| 1948 | struct ib_mad_list_head *mad_list; |
| 1949 | struct ib_mad_qp_info *qp_info; |
| 1950 | struct ib_mad_queue *send_queue; |
| 1951 | struct ib_send_wr *bad_send_wr; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1952 | struct ib_mad_send_wc mad_send_wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | unsigned long flags; |
| 1954 | int ret; |
| 1955 | |
| 1956 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 1957 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 1958 | mad_list); |
| 1959 | send_queue = mad_list->mad_queue; |
| 1960 | qp_info = send_queue->qp_info; |
| 1961 | |
| 1962 | retry: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1963 | 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] | 1964 | pci_unmap_addr(mad_send_wr, header_mapping), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1965 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1966 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
| 1967 | pci_unmap_addr(mad_send_wr, payload_mapping), |
| 1968 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | queued_send_wr = NULL; |
| 1970 | spin_lock_irqsave(&send_queue->lock, flags); |
| 1971 | list_del(&mad_list->list); |
| 1972 | |
| 1973 | /* Move queued send to the send queue */ |
| 1974 | if (send_queue->count-- > send_queue->max_active) { |
| 1975 | mad_list = container_of(qp_info->overflow_list.next, |
| 1976 | struct ib_mad_list_head, list); |
| 1977 | queued_send_wr = container_of(mad_list, |
| 1978 | struct ib_mad_send_wr_private, |
| 1979 | mad_list); |
| 1980 | list_del(&mad_list->list); |
| 1981 | list_add_tail(&mad_list->list, &send_queue->list); |
| 1982 | } |
| 1983 | spin_unlock_irqrestore(&send_queue->lock, flags); |
| 1984 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1985 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 1986 | mad_send_wc.status = wc->status; |
| 1987 | mad_send_wc.vendor_err = wc->vendor_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | if (atomic_read(&qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1989 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1991 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | |
| 1993 | if (queued_send_wr) { |
| 1994 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1995 | &bad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | if (ret) { |
| 1997 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); |
| 1998 | mad_send_wr = queued_send_wr; |
| 1999 | wc->status = IB_WC_LOC_QP_OP_ERR; |
| 2000 | goto retry; |
| 2001 | } |
| 2002 | } |
| 2003 | } |
| 2004 | |
| 2005 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) |
| 2006 | { |
| 2007 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2008 | struct ib_mad_list_head *mad_list; |
| 2009 | unsigned long flags; |
| 2010 | |
| 2011 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
| 2012 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { |
| 2013 | mad_send_wr = container_of(mad_list, |
| 2014 | struct ib_mad_send_wr_private, |
| 2015 | mad_list); |
| 2016 | mad_send_wr->retry = 1; |
| 2017 | } |
| 2018 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
| 2019 | } |
| 2020 | |
| 2021 | static void mad_error_handler(struct ib_mad_port_private *port_priv, |
| 2022 | struct ib_wc *wc) |
| 2023 | { |
| 2024 | struct ib_mad_list_head *mad_list; |
| 2025 | struct ib_mad_qp_info *qp_info; |
| 2026 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2027 | int ret; |
| 2028 | |
| 2029 | /* Determine if failure was a send or receive */ |
| 2030 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 2031 | qp_info = mad_list->mad_queue->qp_info; |
| 2032 | if (mad_list->mad_queue == &qp_info->recv_queue) |
| 2033 | /* |
| 2034 | * Receive errors indicate that the QP has entered the error |
| 2035 | * state - error handling/shutdown code will cleanup |
| 2036 | */ |
| 2037 | return; |
| 2038 | |
| 2039 | /* |
| 2040 | * Send errors will transition the QP to SQE - move |
| 2041 | * QP to RTS and repost flushed work requests |
| 2042 | */ |
| 2043 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 2044 | mad_list); |
| 2045 | if (wc->status == IB_WC_WR_FLUSH_ERR) { |
| 2046 | if (mad_send_wr->retry) { |
| 2047 | /* Repost send */ |
| 2048 | struct ib_send_wr *bad_send_wr; |
| 2049 | |
| 2050 | mad_send_wr->retry = 0; |
| 2051 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, |
| 2052 | &bad_send_wr); |
| 2053 | if (ret) |
| 2054 | ib_mad_send_done_handler(port_priv, wc); |
| 2055 | } else |
| 2056 | ib_mad_send_done_handler(port_priv, wc); |
| 2057 | } else { |
| 2058 | struct ib_qp_attr *attr; |
| 2059 | |
| 2060 | /* Transition QP to RTS and fail offending send */ |
| 2061 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2062 | if (attr) { |
| 2063 | attr->qp_state = IB_QPS_RTS; |
| 2064 | attr->cur_qp_state = IB_QPS_SQE; |
| 2065 | ret = ib_modify_qp(qp_info->qp, attr, |
| 2066 | IB_QP_STATE | IB_QP_CUR_STATE); |
| 2067 | kfree(attr); |
| 2068 | if (ret) |
| 2069 | printk(KERN_ERR PFX "mad_error_handler - " |
| 2070 | "ib_modify_qp to RTS : %d\n", ret); |
| 2071 | else |
| 2072 | mark_sends_for_retry(qp_info); |
| 2073 | } |
| 2074 | ib_mad_send_done_handler(port_priv, wc); |
| 2075 | } |
| 2076 | } |
| 2077 | |
| 2078 | /* |
| 2079 | * IB MAD completion callback |
| 2080 | */ |
| 2081 | static void ib_mad_completion_handler(void *data) |
| 2082 | { |
| 2083 | struct ib_mad_port_private *port_priv; |
| 2084 | struct ib_wc wc; |
| 2085 | |
| 2086 | port_priv = (struct ib_mad_port_private *)data; |
| 2087 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2088 | |
| 2089 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { |
| 2090 | if (wc.status == IB_WC_SUCCESS) { |
| 2091 | switch (wc.opcode) { |
| 2092 | case IB_WC_SEND: |
| 2093 | ib_mad_send_done_handler(port_priv, &wc); |
| 2094 | break; |
| 2095 | case IB_WC_RECV: |
| 2096 | ib_mad_recv_done_handler(port_priv, &wc); |
| 2097 | break; |
| 2098 | default: |
| 2099 | BUG_ON(1); |
| 2100 | break; |
| 2101 | } |
| 2102 | } else |
| 2103 | mad_error_handler(port_priv, &wc); |
| 2104 | } |
| 2105 | } |
| 2106 | |
| 2107 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) |
| 2108 | { |
| 2109 | unsigned long flags; |
| 2110 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; |
| 2111 | struct ib_mad_send_wc mad_send_wc; |
| 2112 | struct list_head cancel_list; |
| 2113 | |
| 2114 | INIT_LIST_HEAD(&cancel_list); |
| 2115 | |
| 2116 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2117 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2118 | &mad_agent_priv->send_list, agent_list) { |
| 2119 | if (mad_send_wr->status == IB_WC_SUCCESS) { |
| 2120 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
| 2121 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 2122 | } |
| 2123 | } |
| 2124 | |
| 2125 | /* Empty wait list to prevent receives from finding a request */ |
| 2126 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2127 | /* Empty local completion list as well */ |
| 2128 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2130 | |
| 2131 | /* Report all cancelled requests */ |
| 2132 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; |
| 2133 | mad_send_wc.vendor_err = 0; |
| 2134 | |
| 2135 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2136 | &cancel_list, agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2137 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 2138 | list_del(&mad_send_wr->agent_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2140 | &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | atomic_dec(&mad_agent_priv->refcount); |
| 2142 | } |
| 2143 | } |
| 2144 | |
| 2145 | static struct ib_mad_send_wr_private* |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2146 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
| 2147 | struct ib_mad_send_buf *send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | { |
| 2149 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2150 | |
| 2151 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
| 2152 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2153 | if (&mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | return mad_send_wr; |
| 2155 | } |
| 2156 | |
| 2157 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
| 2158 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2159 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
| 2160 | &mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | return mad_send_wr; |
| 2162 | } |
| 2163 | return NULL; |
| 2164 | } |
| 2165 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2166 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
| 2167 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | { |
| 2169 | struct ib_mad_agent_private *mad_agent_priv; |
| 2170 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2171 | unsigned long flags; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2172 | int active; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | |
| 2174 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 2175 | agent); |
| 2176 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2177 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2178 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2180 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | } |
| 2182 | |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2183 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2184 | if (!timeout_ms) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2186 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | } |
| 2188 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2189 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2190 | if (active) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2191 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 2192 | else |
| 2193 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2195 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2196 | return 0; |
| 2197 | } |
| 2198 | EXPORT_SYMBOL(ib_modify_mad); |
| 2199 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2200 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
| 2201 | struct ib_mad_send_buf *send_buf) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2202 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2203 | ib_modify_mad(mad_agent, send_buf, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | } |
| 2205 | EXPORT_SYMBOL(ib_cancel_mad); |
| 2206 | |
| 2207 | static void local_completions(void *data) |
| 2208 | { |
| 2209 | struct ib_mad_agent_private *mad_agent_priv; |
| 2210 | struct ib_mad_local_private *local; |
| 2211 | struct ib_mad_agent_private *recv_mad_agent; |
| 2212 | unsigned long flags; |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2213 | int recv = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | struct ib_wc wc; |
| 2215 | struct ib_mad_send_wc mad_send_wc; |
| 2216 | |
| 2217 | mad_agent_priv = (struct ib_mad_agent_private *)data; |
| 2218 | |
| 2219 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2220 | while (!list_empty(&mad_agent_priv->local_list)) { |
| 2221 | local = list_entry(mad_agent_priv->local_list.next, |
| 2222 | struct ib_mad_local_private, |
| 2223 | completion_list); |
| 2224 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2225 | if (local->mad_priv) { |
| 2226 | recv_mad_agent = local->recv_mad_agent; |
| 2227 | if (!recv_mad_agent) { |
| 2228 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | goto local_send_completion; |
| 2230 | } |
| 2231 | |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2232 | recv = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | /* |
| 2234 | * Defined behavior is to complete response |
| 2235 | * before request |
| 2236 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2237 | build_smp_wc((unsigned long) local->mad_send_wr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2238 | be16_to_cpu(IB_LID_PERMISSIVE), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2239 | 0, recv_mad_agent->agent.port_num, &wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | |
| 2241 | local->mad_priv->header.recv_wc.wc = &wc; |
| 2242 | local->mad_priv->header.recv_wc.mad_len = |
| 2243 | sizeof(struct ib_mad); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2244 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
| 2245 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, |
| 2246 | &local->mad_priv->header.recv_wc.rmpp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
| 2248 | local->mad_priv->header.recv_wc.recv_buf.mad = |
| 2249 | &local->mad_priv->mad.mad; |
| 2250 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
| 2251 | snoop_recv(recv_mad_agent->qp_info, |
| 2252 | &local->mad_priv->header.recv_wc, |
| 2253 | IB_MAD_SNOOP_RECVS); |
| 2254 | recv_mad_agent->agent.recv_handler( |
| 2255 | &recv_mad_agent->agent, |
| 2256 | &local->mad_priv->header.recv_wc); |
| 2257 | spin_lock_irqsave(&recv_mad_agent->lock, flags); |
| 2258 | atomic_dec(&recv_mad_agent->refcount); |
| 2259 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); |
| 2260 | } |
| 2261 | |
| 2262 | local_send_completion: |
| 2263 | /* Complete send */ |
| 2264 | mad_send_wc.status = IB_WC_SUCCESS; |
| 2265 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2266 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2268 | snoop_send(mad_agent_priv->qp_info, |
| 2269 | &local->mad_send_wr->send_buf, |
| 2270 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2272 | &mad_send_wc); |
| 2273 | |
| 2274 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2275 | list_del(&local->completion_list); |
| 2276 | atomic_dec(&mad_agent_priv->refcount); |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2277 | if (!recv) |
| 2278 | kmem_cache_free(ib_mad_cache, local->mad_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | kfree(local); |
| 2280 | } |
| 2281 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2282 | } |
| 2283 | |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2284 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
| 2285 | { |
| 2286 | int ret; |
| 2287 | |
| 2288 | if (!mad_send_wr->retries--) |
| 2289 | return -ETIMEDOUT; |
| 2290 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2291 | 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] | 2292 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2293 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
| 2294 | ret = ib_retry_rmpp(mad_send_wr); |
| 2295 | switch (ret) { |
| 2296 | case IB_RMPP_RESULT_UNHANDLED: |
| 2297 | ret = ib_send_mad(mad_send_wr); |
| 2298 | break; |
| 2299 | case IB_RMPP_RESULT_CONSUMED: |
| 2300 | ret = 0; |
| 2301 | break; |
| 2302 | default: |
| 2303 | ret = -ECOMM; |
| 2304 | break; |
| 2305 | } |
| 2306 | } else |
| 2307 | ret = ib_send_mad(mad_send_wr); |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2308 | |
| 2309 | if (!ret) { |
| 2310 | mad_send_wr->refcount++; |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2311 | list_add_tail(&mad_send_wr->agent_list, |
| 2312 | &mad_send_wr->mad_agent_priv->send_list); |
| 2313 | } |
| 2314 | return ret; |
| 2315 | } |
| 2316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | static void timeout_sends(void *data) |
| 2318 | { |
| 2319 | struct ib_mad_agent_private *mad_agent_priv; |
| 2320 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2321 | struct ib_mad_send_wc mad_send_wc; |
| 2322 | unsigned long flags, delay; |
| 2323 | |
| 2324 | mad_agent_priv = (struct ib_mad_agent_private *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | mad_send_wc.vendor_err = 0; |
| 2326 | |
| 2327 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2328 | while (!list_empty(&mad_agent_priv->wait_list)) { |
| 2329 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 2330 | struct ib_mad_send_wr_private, |
| 2331 | agent_list); |
| 2332 | |
| 2333 | if (time_after(mad_send_wr->timeout, jiffies)) { |
| 2334 | delay = mad_send_wr->timeout - jiffies; |
| 2335 | if ((long)delay <= 0) |
| 2336 | delay = 1; |
| 2337 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 2338 | port_priv->wq, |
| 2339 | &mad_agent_priv->timed_work, delay); |
| 2340 | break; |
| 2341 | } |
| 2342 | |
Hal Rosenstock | dbf9227 | 2005-07-27 11:45:30 -0700 | [diff] [blame] | 2343 | list_del(&mad_send_wr->agent_list); |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2344 | if (mad_send_wr->status == IB_WC_SUCCESS && |
| 2345 | !retry_send(mad_send_wr)) |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2346 | continue; |
| 2347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2349 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2350 | if (mad_send_wr->status == IB_WC_SUCCESS) |
| 2351 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; |
| 2352 | else |
| 2353 | mad_send_wc.status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2354 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2356 | &mad_send_wc); |
| 2357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | atomic_dec(&mad_agent_priv->refcount); |
| 2359 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2360 | } |
| 2361 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2362 | } |
| 2363 | |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2364 | 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] | 2365 | { |
| 2366 | struct ib_mad_port_private *port_priv = cq->cq_context; |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame^] | 2367 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame^] | 2369 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2370 | if (!list_empty(&port_priv->port_list)) |
| 2371 | queue_work(port_priv->wq, &port_priv->work); |
| 2372 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | } |
| 2374 | |
| 2375 | /* |
| 2376 | * Allocate receive MADs and post receive WRs for them |
| 2377 | */ |
| 2378 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| 2379 | struct ib_mad_private *mad) |
| 2380 | { |
| 2381 | unsigned long flags; |
| 2382 | int post, ret; |
| 2383 | struct ib_mad_private *mad_priv; |
| 2384 | struct ib_sge sg_list; |
| 2385 | struct ib_recv_wr recv_wr, *bad_recv_wr; |
| 2386 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; |
| 2387 | |
| 2388 | /* Initialize common scatter list fields */ |
| 2389 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; |
| 2390 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; |
| 2391 | |
| 2392 | /* Initialize common receive WR fields */ |
| 2393 | recv_wr.next = NULL; |
| 2394 | recv_wr.sg_list = &sg_list; |
| 2395 | recv_wr.num_sge = 1; |
| 2396 | |
| 2397 | do { |
| 2398 | /* Allocate and map receive buffer */ |
| 2399 | if (mad) { |
| 2400 | mad_priv = mad; |
| 2401 | mad = NULL; |
| 2402 | } else { |
| 2403 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 2404 | if (!mad_priv) { |
| 2405 | printk(KERN_ERR PFX "No memory for receive buffer\n"); |
| 2406 | ret = -ENOMEM; |
| 2407 | break; |
| 2408 | } |
| 2409 | } |
| 2410 | sg_list.addr = dma_map_single(qp_info->port_priv-> |
| 2411 | device->dma_device, |
| 2412 | &mad_priv->grh, |
| 2413 | sizeof *mad_priv - |
| 2414 | sizeof mad_priv->header, |
| 2415 | DMA_FROM_DEVICE); |
| 2416 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); |
| 2417 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
| 2418 | mad_priv->header.mad_list.mad_queue = recv_queue; |
| 2419 | |
| 2420 | /* Post receive WR */ |
| 2421 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2422 | post = (++recv_queue->count < recv_queue->max_active); |
| 2423 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); |
| 2424 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
| 2425 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); |
| 2426 | if (ret) { |
| 2427 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2428 | list_del(&mad_priv->header.mad_list.list); |
| 2429 | recv_queue->count--; |
| 2430 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
| 2431 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
| 2432 | pci_unmap_addr(&mad_priv->header, |
| 2433 | mapping), |
| 2434 | sizeof *mad_priv - |
| 2435 | sizeof mad_priv->header, |
| 2436 | DMA_FROM_DEVICE); |
| 2437 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 2438 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); |
| 2439 | break; |
| 2440 | } |
| 2441 | } while (post); |
| 2442 | |
| 2443 | return ret; |
| 2444 | } |
| 2445 | |
| 2446 | /* |
| 2447 | * Return all the posted receive MADs |
| 2448 | */ |
| 2449 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) |
| 2450 | { |
| 2451 | struct ib_mad_private_header *mad_priv_hdr; |
| 2452 | struct ib_mad_private *recv; |
| 2453 | struct ib_mad_list_head *mad_list; |
| 2454 | |
| 2455 | while (!list_empty(&qp_info->recv_queue.list)) { |
| 2456 | |
| 2457 | mad_list = list_entry(qp_info->recv_queue.list.next, |
| 2458 | struct ib_mad_list_head, list); |
| 2459 | mad_priv_hdr = container_of(mad_list, |
| 2460 | struct ib_mad_private_header, |
| 2461 | mad_list); |
| 2462 | recv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 2463 | header); |
| 2464 | |
| 2465 | /* Remove from posted receive MAD list */ |
| 2466 | list_del(&mad_list->list); |
| 2467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
| 2469 | pci_unmap_addr(&recv->header, mapping), |
| 2470 | sizeof(struct ib_mad_private) - |
| 2471 | sizeof(struct ib_mad_private_header), |
| 2472 | DMA_FROM_DEVICE); |
| 2473 | kmem_cache_free(ib_mad_cache, recv); |
| 2474 | } |
| 2475 | |
| 2476 | qp_info->recv_queue.count = 0; |
| 2477 | } |
| 2478 | |
| 2479 | /* |
| 2480 | * Start the port |
| 2481 | */ |
| 2482 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) |
| 2483 | { |
| 2484 | int ret, i; |
| 2485 | struct ib_qp_attr *attr; |
| 2486 | struct ib_qp *qp; |
| 2487 | |
| 2488 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2489 | if (!attr) { |
| 2490 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
| 2491 | return -ENOMEM; |
| 2492 | } |
| 2493 | |
| 2494 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
| 2495 | qp = port_priv->qp_info[i].qp; |
| 2496 | /* |
| 2497 | * PKey index for QP1 is irrelevant but |
| 2498 | * one is needed for the Reset to Init transition |
| 2499 | */ |
| 2500 | attr->qp_state = IB_QPS_INIT; |
| 2501 | attr->pkey_index = 0; |
| 2502 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
| 2503 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | |
| 2504 | IB_QP_PKEY_INDEX | IB_QP_QKEY); |
| 2505 | if (ret) { |
| 2506 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2507 | "INIT: %d\n", i, ret); |
| 2508 | goto out; |
| 2509 | } |
| 2510 | |
| 2511 | attr->qp_state = IB_QPS_RTR; |
| 2512 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); |
| 2513 | if (ret) { |
| 2514 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2515 | "RTR: %d\n", i, ret); |
| 2516 | goto out; |
| 2517 | } |
| 2518 | |
| 2519 | attr->qp_state = IB_QPS_RTS; |
| 2520 | attr->sq_psn = IB_MAD_SEND_Q_PSN; |
| 2521 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); |
| 2522 | if (ret) { |
| 2523 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2524 | "RTS: %d\n", i, ret); |
| 2525 | goto out; |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2530 | if (ret) { |
| 2531 | printk(KERN_ERR PFX "Failed to request completion " |
| 2532 | "notification: %d\n", ret); |
| 2533 | goto out; |
| 2534 | } |
| 2535 | |
| 2536 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
| 2537 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
| 2538 | if (ret) { |
| 2539 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); |
| 2540 | goto out; |
| 2541 | } |
| 2542 | } |
| 2543 | out: |
| 2544 | kfree(attr); |
| 2545 | return ret; |
| 2546 | } |
| 2547 | |
| 2548 | static void qp_event_handler(struct ib_event *event, void *qp_context) |
| 2549 | { |
| 2550 | struct ib_mad_qp_info *qp_info = qp_context; |
| 2551 | |
| 2552 | /* It's worse than that! He's dead, Jim! */ |
| 2553 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", |
| 2554 | event->event, qp_info->qp->qp_num); |
| 2555 | } |
| 2556 | |
| 2557 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, |
| 2558 | struct ib_mad_queue *mad_queue) |
| 2559 | { |
| 2560 | mad_queue->qp_info = qp_info; |
| 2561 | mad_queue->count = 0; |
| 2562 | spin_lock_init(&mad_queue->lock); |
| 2563 | INIT_LIST_HEAD(&mad_queue->list); |
| 2564 | } |
| 2565 | |
| 2566 | static void init_mad_qp(struct ib_mad_port_private *port_priv, |
| 2567 | struct ib_mad_qp_info *qp_info) |
| 2568 | { |
| 2569 | qp_info->port_priv = port_priv; |
| 2570 | init_mad_queue(qp_info, &qp_info->send_queue); |
| 2571 | init_mad_queue(qp_info, &qp_info->recv_queue); |
| 2572 | INIT_LIST_HEAD(&qp_info->overflow_list); |
| 2573 | spin_lock_init(&qp_info->snoop_lock); |
| 2574 | qp_info->snoop_table = NULL; |
| 2575 | qp_info->snoop_table_size = 0; |
| 2576 | atomic_set(&qp_info->snoop_count, 0); |
| 2577 | } |
| 2578 | |
| 2579 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, |
| 2580 | enum ib_qp_type qp_type) |
| 2581 | { |
| 2582 | struct ib_qp_init_attr qp_init_attr; |
| 2583 | int ret; |
| 2584 | |
| 2585 | memset(&qp_init_attr, 0, sizeof qp_init_attr); |
| 2586 | qp_init_attr.send_cq = qp_info->port_priv->cq; |
| 2587 | qp_init_attr.recv_cq = qp_info->port_priv->cq; |
| 2588 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; |
| 2589 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; |
| 2590 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; |
| 2591 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
| 2592 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; |
| 2593 | qp_init_attr.qp_type = qp_type; |
| 2594 | qp_init_attr.port_num = qp_info->port_priv->port_num; |
| 2595 | qp_init_attr.qp_context = qp_info; |
| 2596 | qp_init_attr.event_handler = qp_event_handler; |
| 2597 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); |
| 2598 | if (IS_ERR(qp_info->qp)) { |
| 2599 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", |
| 2600 | get_spl_qp_index(qp_type)); |
| 2601 | ret = PTR_ERR(qp_info->qp); |
| 2602 | goto error; |
| 2603 | } |
| 2604 | /* Use minimum queue sizes unless the CQ is resized */ |
| 2605 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; |
| 2606 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; |
| 2607 | return 0; |
| 2608 | |
| 2609 | error: |
| 2610 | return ret; |
| 2611 | } |
| 2612 | |
| 2613 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) |
| 2614 | { |
| 2615 | ib_destroy_qp(qp_info->qp); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 2616 | kfree(qp_info->snoop_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | } |
| 2618 | |
| 2619 | /* |
| 2620 | * Open the port |
| 2621 | * Create the QP, PD, MR, and CQ if needed |
| 2622 | */ |
| 2623 | static int ib_mad_port_open(struct ib_device *device, |
| 2624 | int port_num) |
| 2625 | { |
| 2626 | int ret, cq_size; |
| 2627 | struct ib_mad_port_private *port_priv; |
| 2628 | unsigned long flags; |
| 2629 | char name[sizeof "ib_mad123"]; |
| 2630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | /* Create new device info */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2632 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | if (!port_priv) { |
| 2634 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); |
| 2635 | return -ENOMEM; |
| 2636 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | port_priv->device = device; |
| 2639 | port_priv->port_num = port_num; |
| 2640 | spin_lock_init(&port_priv->reg_lock); |
| 2641 | INIT_LIST_HEAD(&port_priv->agent_list); |
| 2642 | init_mad_qp(port_priv, &port_priv->qp_info[0]); |
| 2643 | init_mad_qp(port_priv, &port_priv->qp_info[1]); |
| 2644 | |
| 2645 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; |
| 2646 | port_priv->cq = ib_create_cq(port_priv->device, |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2647 | ib_mad_thread_completion_handler, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2648 | NULL, port_priv, cq_size); |
| 2649 | if (IS_ERR(port_priv->cq)) { |
| 2650 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); |
| 2651 | ret = PTR_ERR(port_priv->cq); |
| 2652 | goto error3; |
| 2653 | } |
| 2654 | |
| 2655 | port_priv->pd = ib_alloc_pd(device); |
| 2656 | if (IS_ERR(port_priv->pd)) { |
| 2657 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); |
| 2658 | ret = PTR_ERR(port_priv->pd); |
| 2659 | goto error4; |
| 2660 | } |
| 2661 | |
| 2662 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); |
| 2663 | if (IS_ERR(port_priv->mr)) { |
| 2664 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); |
| 2665 | ret = PTR_ERR(port_priv->mr); |
| 2666 | goto error5; |
| 2667 | } |
| 2668 | |
| 2669 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); |
| 2670 | if (ret) |
| 2671 | goto error6; |
| 2672 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
| 2673 | if (ret) |
| 2674 | goto error7; |
| 2675 | |
| 2676 | snprintf(name, sizeof name, "ib_mad%d", port_num); |
| 2677 | port_priv->wq = create_singlethread_workqueue(name); |
| 2678 | if (!port_priv->wq) { |
| 2679 | ret = -ENOMEM; |
| 2680 | goto error8; |
| 2681 | } |
| 2682 | INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv); |
| 2683 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame^] | 2684 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2685 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); |
| 2686 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2687 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | ret = ib_mad_port_start(port_priv); |
| 2689 | if (ret) { |
| 2690 | printk(KERN_ERR PFX "Couldn't start port\n"); |
| 2691 | goto error9; |
| 2692 | } |
| 2693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | return 0; |
| 2695 | |
| 2696 | error9: |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame^] | 2697 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2698 | list_del_init(&port_priv->port_list); |
| 2699 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | destroy_workqueue(port_priv->wq); |
| 2702 | error8: |
| 2703 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2704 | error7: |
| 2705 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2706 | error6: |
| 2707 | ib_dereg_mr(port_priv->mr); |
| 2708 | error5: |
| 2709 | ib_dealloc_pd(port_priv->pd); |
| 2710 | error4: |
| 2711 | ib_destroy_cq(port_priv->cq); |
| 2712 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2713 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2714 | error3: |
| 2715 | kfree(port_priv); |
| 2716 | |
| 2717 | return ret; |
| 2718 | } |
| 2719 | |
| 2720 | /* |
| 2721 | * Close the port |
| 2722 | * If there are no classes using the port, free the port |
| 2723 | * resources (CQ, MR, PD, QP) and remove the port's info structure |
| 2724 | */ |
| 2725 | static int ib_mad_port_close(struct ib_device *device, int port_num) |
| 2726 | { |
| 2727 | struct ib_mad_port_private *port_priv; |
| 2728 | unsigned long flags; |
| 2729 | |
| 2730 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2731 | port_priv = __ib_get_mad_port(device, port_num); |
| 2732 | if (port_priv == NULL) { |
| 2733 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2734 | printk(KERN_ERR PFX "Port %d not found\n", port_num); |
| 2735 | return -ENODEV; |
| 2736 | } |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame^] | 2737 | list_del_init(&port_priv->port_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | destroy_workqueue(port_priv->wq); |
| 2741 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2742 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2743 | ib_dereg_mr(port_priv->mr); |
| 2744 | ib_dealloc_pd(port_priv->pd); |
| 2745 | ib_destroy_cq(port_priv->cq); |
| 2746 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2747 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2748 | /* XXX: Handle deallocation of MAD registration tables */ |
| 2749 | |
| 2750 | kfree(port_priv); |
| 2751 | |
| 2752 | return 0; |
| 2753 | } |
| 2754 | |
| 2755 | static void ib_mad_init_device(struct ib_device *device) |
| 2756 | { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2757 | int start, end, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | |
| 2759 | if (device->node_type == IB_NODE_SWITCH) { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2760 | start = 0; |
| 2761 | end = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | } else { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2763 | start = 1; |
| 2764 | end = device->phys_port_cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2766 | |
| 2767 | for (i = start; i <= end; i++) { |
| 2768 | if (ib_mad_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2770 | device->name, i); |
| 2771 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2773 | if (ib_agent_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
| 2775 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2776 | device->name, i); |
| 2777 | goto error_agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | } |
| 2779 | } |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2780 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2782 | error_agent: |
| 2783 | if (ib_mad_port_close(device, i)) |
| 2784 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 2785 | device->name, i); |
| 2786 | |
| 2787 | error: |
| 2788 | i--; |
| 2789 | |
| 2790 | while (i >= start) { |
| 2791 | if (ib_agent_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 2793 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2794 | device->name, i); |
| 2795 | if (ib_mad_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2797 | device->name, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | i--; |
| 2799 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2800 | } |
| 2801 | |
| 2802 | static void ib_mad_remove_device(struct ib_device *device) |
| 2803 | { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2804 | int i, num_ports, cur_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | |
| 2806 | if (device->node_type == IB_NODE_SWITCH) { |
| 2807 | num_ports = 1; |
| 2808 | cur_port = 0; |
| 2809 | } else { |
| 2810 | num_ports = device->phys_port_cnt; |
| 2811 | cur_port = 1; |
| 2812 | } |
| 2813 | for (i = 0; i < num_ports; i++, cur_port++) { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2814 | if (ib_agent_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 2816 | "for agents\n", |
| 2817 | device->name, cur_port); |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2818 | if (ib_mad_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 2820 | device->name, cur_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | } |
| 2822 | } |
| 2823 | |
| 2824 | static struct ib_client mad_client = { |
| 2825 | .name = "mad", |
| 2826 | .add = ib_mad_init_device, |
| 2827 | .remove = ib_mad_remove_device |
| 2828 | }; |
| 2829 | |
| 2830 | static int __init ib_mad_init_module(void) |
| 2831 | { |
| 2832 | int ret; |
| 2833 | |
| 2834 | spin_lock_init(&ib_mad_port_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | |
| 2836 | ib_mad_cache = kmem_cache_create("ib_mad", |
| 2837 | sizeof(struct ib_mad_private), |
| 2838 | 0, |
| 2839 | SLAB_HWCACHE_ALIGN, |
| 2840 | NULL, |
| 2841 | NULL); |
| 2842 | if (!ib_mad_cache) { |
| 2843 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); |
| 2844 | ret = -ENOMEM; |
| 2845 | goto error1; |
| 2846 | } |
| 2847 | |
| 2848 | INIT_LIST_HEAD(&ib_mad_port_list); |
| 2849 | |
| 2850 | if (ib_register_client(&mad_client)) { |
| 2851 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); |
| 2852 | ret = -EINVAL; |
| 2853 | goto error2; |
| 2854 | } |
| 2855 | |
| 2856 | return 0; |
| 2857 | |
| 2858 | error2: |
| 2859 | kmem_cache_destroy(ib_mad_cache); |
| 2860 | error1: |
| 2861 | return ret; |
| 2862 | } |
| 2863 | |
| 2864 | static void __exit ib_mad_cleanup_module(void) |
| 2865 | { |
| 2866 | ib_unregister_client(&mad_client); |
| 2867 | |
| 2868 | if (kmem_cache_destroy(ib_mad_cache)) { |
| 2869 | printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n"); |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | module_init(ib_mad_init_module); |
| 2874 | module_exit(ib_mad_cleanup_module); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2875 | |