Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 2 | * Copyright (c) 2004-2007 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. |
Hal Rosenstock | b76aabc | 2009-09-07 08:28:48 -0700 | [diff] [blame] | 5 | * Copyright (c) 2009 HNR Consulting. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
| 16 | * |
| 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
| 20 | * |
| 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
| 34 | * |
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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Paul Gortmaker | e4dd23d | 2011-05-27 15:35:46 -0400 | [diff] [blame] | 38 | #include <linux/module.h> |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 39 | #include <rdma/ib_cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include "mad_priv.h" |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 42 | #include "mad_rmpp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "smi.h" |
| 44 | #include "agent.h" |
| 45 | |
| 46 | MODULE_LICENSE("Dual BSD/GPL"); |
| 47 | MODULE_DESCRIPTION("kernel IB MAD API"); |
| 48 | MODULE_AUTHOR("Hal Rosenstock"); |
| 49 | MODULE_AUTHOR("Sean Hefty"); |
| 50 | |
Roland Dreier | 1693395 | 2010-05-23 21:39:31 -0700 | [diff] [blame] | 51 | static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
| 52 | static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; |
Hal Rosenstock | b76aabc | 2009-09-07 08:28:48 -0700 | [diff] [blame] | 53 | |
| 54 | module_param_named(send_queue_size, mad_sendq_size, int, 0444); |
| 55 | MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); |
| 56 | module_param_named(recv_queue_size, mad_recvq_size, int, 0444); |
| 57 | MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); |
| 58 | |
Roland Dreier | e54f818 | 2006-11-29 15:33:07 -0800 | [diff] [blame] | 59 | static struct kmem_cache *ib_mad_cache; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static struct list_head ib_mad_port_list; |
| 62 | static u32 ib_mad_client_id = 0; |
| 63 | |
| 64 | /* Port list lock */ |
Roland Dreier | 6276e08 | 2009-09-05 20:24:23 -0700 | [diff] [blame] | 65 | static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | /* Forward declarations */ |
| 68 | static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| 69 | struct ib_mad_reg_req *mad_reg_req); |
| 70 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); |
| 71 | static struct ib_mad_agent_private *find_mad_agent( |
| 72 | struct ib_mad_port_private *port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 73 | struct ib_mad *mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| 75 | struct ib_mad_private *mad); |
| 76 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 77 | static void timeout_sends(struct work_struct *work); |
| 78 | static void local_completions(struct work_struct *work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 80 | struct ib_mad_agent_private *agent_priv, |
| 81 | u8 mgmt_class); |
| 82 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 83 | struct ib_mad_agent_private *agent_priv); |
| 84 | |
| 85 | /* |
| 86 | * Returns a ib_mad_port_private structure or NULL for a device/port |
| 87 | * Assumes ib_mad_port_list_lock is being held |
| 88 | */ |
| 89 | static inline struct ib_mad_port_private * |
| 90 | __ib_get_mad_port(struct ib_device *device, int port_num) |
| 91 | { |
| 92 | struct ib_mad_port_private *entry; |
| 93 | |
| 94 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { |
| 95 | if (entry->device == device && entry->port_num == port_num) |
| 96 | return entry; |
| 97 | } |
| 98 | return NULL; |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Wrapper function to return a ib_mad_port_private structure or NULL |
| 103 | * for a device/port |
| 104 | */ |
| 105 | static inline struct ib_mad_port_private * |
| 106 | ib_get_mad_port(struct ib_device *device, int port_num) |
| 107 | { |
| 108 | struct ib_mad_port_private *entry; |
| 109 | unsigned long flags; |
| 110 | |
| 111 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 112 | entry = __ib_get_mad_port(device, port_num); |
| 113 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 114 | |
| 115 | return entry; |
| 116 | } |
| 117 | |
| 118 | static inline u8 convert_mgmt_class(u8 mgmt_class) |
| 119 | { |
| 120 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ |
| 121 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? |
| 122 | 0 : mgmt_class; |
| 123 | } |
| 124 | |
| 125 | static int get_spl_qp_index(enum ib_qp_type qp_type) |
| 126 | { |
| 127 | switch (qp_type) |
| 128 | { |
| 129 | case IB_QPT_SMI: |
| 130 | return 0; |
| 131 | case IB_QPT_GSI: |
| 132 | return 1; |
| 133 | default: |
| 134 | return -1; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | static int vendor_class_index(u8 mgmt_class) |
| 139 | { |
| 140 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; |
| 141 | } |
| 142 | |
| 143 | static int is_vendor_class(u8 mgmt_class) |
| 144 | { |
| 145 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || |
| 146 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
| 147 | return 0; |
| 148 | return 1; |
| 149 | } |
| 150 | |
| 151 | static int is_vendor_oui(char *oui) |
| 152 | { |
| 153 | if (oui[0] || oui[1] || oui[2]) |
| 154 | return 1; |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static int is_vendor_method_in_use( |
| 159 | struct ib_mad_mgmt_vendor_class *vendor_class, |
| 160 | struct ib_mad_reg_req *mad_reg_req) |
| 161 | { |
| 162 | struct ib_mad_mgmt_method_table *method; |
| 163 | int i; |
| 164 | |
| 165 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 166 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { |
| 167 | method = vendor_class->method_table[i]; |
| 168 | if (method) { |
| 169 | if (method_in_use(&method, mad_reg_req)) |
| 170 | return 1; |
| 171 | else |
| 172 | break; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | return 0; |
| 177 | } |
| 178 | |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 179 | int ib_response_mad(struct ib_mad *mad) |
| 180 | { |
| 181 | return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) || |
| 182 | (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || |
| 183 | ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) && |
| 184 | (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP))); |
| 185 | } |
| 186 | EXPORT_SYMBOL(ib_response_mad); |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | /* |
| 189 | * ib_register_mad_agent - Register to send/receive MADs |
| 190 | */ |
| 191 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, |
| 192 | u8 port_num, |
| 193 | enum ib_qp_type qp_type, |
| 194 | struct ib_mad_reg_req *mad_reg_req, |
| 195 | u8 rmpp_version, |
| 196 | ib_mad_send_handler send_handler, |
| 197 | ib_mad_recv_handler recv_handler, |
| 198 | void *context) |
| 199 | { |
| 200 | struct ib_mad_port_private *port_priv; |
| 201 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); |
| 202 | struct ib_mad_agent_private *mad_agent_priv; |
| 203 | struct ib_mad_reg_req *reg_req = NULL; |
| 204 | struct ib_mad_mgmt_class_table *class; |
| 205 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 206 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 207 | struct ib_mad_mgmt_method_table *method; |
| 208 | int ret2, qpn; |
| 209 | unsigned long flags; |
| 210 | u8 mgmt_class, vclass; |
| 211 | |
| 212 | /* Validate parameters */ |
| 213 | qpn = get_spl_qp_index(qp_type); |
| 214 | if (qpn == -1) |
| 215 | goto error1; |
| 216 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 217 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
| 218 | goto error1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | /* Validate MAD registration request if supplied */ |
| 221 | if (mad_reg_req) { |
| 222 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) |
| 223 | goto error1; |
| 224 | if (!recv_handler) |
| 225 | goto error1; |
| 226 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
| 227 | /* |
| 228 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only |
| 229 | * one in this range currently allowed |
| 230 | */ |
| 231 | if (mad_reg_req->mgmt_class != |
| 232 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
| 233 | goto error1; |
| 234 | } else if (mad_reg_req->mgmt_class == 0) { |
| 235 | /* |
| 236 | * Class 0 is reserved in IBA and is used for |
| 237 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE |
| 238 | */ |
| 239 | goto error1; |
| 240 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { |
| 241 | /* |
| 242 | * If class is in "new" vendor range, |
| 243 | * ensure supplied OUI is not zero |
| 244 | */ |
| 245 | if (!is_vendor_oui(mad_reg_req->oui)) |
| 246 | goto error1; |
| 247 | } |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 248 | /* Make sure class supplied is consistent with RMPP */ |
Hal Rosenstock | 64cb9c6 | 2006-04-12 21:29:10 -0400 | [diff] [blame] | 249 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 250 | if (rmpp_version) |
| 251 | goto error1; |
| 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* Make sure class supplied is consistent with QP type */ |
| 254 | if (qp_type == IB_QPT_SMI) { |
| 255 | if ((mad_reg_req->mgmt_class != |
| 256 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && |
| 257 | (mad_reg_req->mgmt_class != |
| 258 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 259 | goto error1; |
| 260 | } else { |
| 261 | if ((mad_reg_req->mgmt_class == |
| 262 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 263 | (mad_reg_req->mgmt_class == |
| 264 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) |
| 265 | goto error1; |
| 266 | } |
| 267 | } else { |
| 268 | /* No registration request supplied */ |
| 269 | if (!send_handler) |
| 270 | goto error1; |
| 271 | } |
| 272 | |
| 273 | /* Validate device and port */ |
| 274 | port_priv = ib_get_mad_port(device, port_num); |
| 275 | if (!port_priv) { |
| 276 | ret = ERR_PTR(-ENODEV); |
| 277 | goto error1; |
| 278 | } |
| 279 | |
Ira Weiny | c8367c4 | 2011-05-19 18:19:28 -0700 | [diff] [blame] | 280 | /* Verify the QP requested is supported. For example, Ethernet devices |
| 281 | * will not have QP0 */ |
| 282 | if (!port_priv->qp_info[qpn].qp) { |
| 283 | ret = ERR_PTR(-EPROTONOSUPPORT); |
| 284 | goto error1; |
| 285 | } |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 288 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | if (!mad_agent_priv) { |
| 290 | ret = ERR_PTR(-ENOMEM); |
| 291 | goto error1; |
| 292 | } |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 293 | |
| 294 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, |
| 295 | IB_ACCESS_LOCAL_WRITE); |
| 296 | if (IS_ERR(mad_agent_priv->agent.mr)) { |
| 297 | ret = ERR_PTR(-ENOMEM); |
| 298 | goto error2; |
| 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | if (mad_reg_req) { |
Julia Lawall | 9893e74 | 2010-05-15 23:22:38 +0200 | [diff] [blame] | 302 | reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | if (!reg_req) { |
| 304 | ret = ERR_PTR(-ENOMEM); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 305 | goto error3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
| 311 | mad_agent_priv->reg_req = reg_req; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 312 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | mad_agent_priv->agent.device = device; |
| 314 | mad_agent_priv->agent.recv_handler = recv_handler; |
| 315 | mad_agent_priv->agent.send_handler = send_handler; |
| 316 | mad_agent_priv->agent.context = context; |
| 317 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 318 | mad_agent_priv->agent.port_num = port_num; |
Ralph Campbell | d9620a4 | 2009-02-27 14:44:32 -0800 | [diff] [blame] | 319 | spin_lock_init(&mad_agent_priv->lock); |
| 320 | INIT_LIST_HEAD(&mad_agent_priv->send_list); |
| 321 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); |
| 322 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
| 323 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
| 324 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); |
| 325 | INIT_LIST_HEAD(&mad_agent_priv->local_list); |
| 326 | INIT_WORK(&mad_agent_priv->local_work, local_completions); |
| 327 | atomic_set(&mad_agent_priv->refcount, 1); |
| 328 | init_completion(&mad_agent_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 331 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; |
| 332 | |
| 333 | /* |
| 334 | * Make sure MAD registration (if supplied) |
| 335 | * is non overlapping with any existing ones |
| 336 | */ |
| 337 | if (mad_reg_req) { |
| 338 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); |
| 339 | if (!is_vendor_class(mgmt_class)) { |
| 340 | class = port_priv->version[mad_reg_req-> |
| 341 | mgmt_class_version].class; |
| 342 | if (class) { |
| 343 | method = class->method_table[mgmt_class]; |
| 344 | if (method) { |
| 345 | if (method_in_use(&method, |
| 346 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 347 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | } |
| 350 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, |
| 351 | mgmt_class); |
| 352 | } else { |
| 353 | /* "New" vendor class range */ |
| 354 | vendor = port_priv->version[mad_reg_req-> |
| 355 | mgmt_class_version].vendor; |
| 356 | if (vendor) { |
| 357 | vclass = vendor_class_index(mgmt_class); |
| 358 | vendor_class = vendor->vendor_class[vclass]; |
| 359 | if (vendor_class) { |
| 360 | if (is_vendor_method_in_use( |
| 361 | vendor_class, |
| 362 | mad_reg_req)) |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 363 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | } |
| 366 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); |
| 367 | } |
| 368 | if (ret2) { |
| 369 | ret = ERR_PTR(ret2); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 370 | goto error4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
| 372 | } |
| 373 | |
| 374 | /* Add mad agent into port's agent list */ |
| 375 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); |
| 376 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return &mad_agent_priv->agent; |
| 379 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 380 | error4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 382 | kfree(reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 383 | error3: |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 384 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Adrian Bunk | 2012a11 | 2005-11-27 00:37:36 +0100 | [diff] [blame] | 385 | error2: |
| 386 | kfree(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | error1: |
| 388 | return ret; |
| 389 | } |
| 390 | EXPORT_SYMBOL(ib_register_mad_agent); |
| 391 | |
| 392 | static inline int is_snooping_sends(int mad_snoop_flags) |
| 393 | { |
| 394 | return (mad_snoop_flags & |
| 395 | (/*IB_MAD_SNOOP_POSTED_SENDS | |
| 396 | IB_MAD_SNOOP_RMPP_SENDS |*/ |
| 397 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| |
| 398 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); |
| 399 | } |
| 400 | |
| 401 | static inline int is_snooping_recvs(int mad_snoop_flags) |
| 402 | { |
| 403 | return (mad_snoop_flags & |
| 404 | (IB_MAD_SNOOP_RECVS /*| |
| 405 | IB_MAD_SNOOP_RMPP_RECVS*/)); |
| 406 | } |
| 407 | |
| 408 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, |
| 409 | struct ib_mad_snoop_private *mad_snoop_priv) |
| 410 | { |
| 411 | struct ib_mad_snoop_private **new_snoop_table; |
| 412 | unsigned long flags; |
| 413 | int i; |
| 414 | |
| 415 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 416 | /* Check for empty slot in array. */ |
| 417 | for (i = 0; i < qp_info->snoop_table_size; i++) |
| 418 | if (!qp_info->snoop_table[i]) |
| 419 | break; |
| 420 | |
| 421 | if (i == qp_info->snoop_table_size) { |
| 422 | /* Grow table. */ |
Roland Dreier | 5280517 | 2008-10-14 14:05:36 -0700 | [diff] [blame] | 423 | new_snoop_table = krealloc(qp_info->snoop_table, |
| 424 | sizeof mad_snoop_priv * |
| 425 | (qp_info->snoop_table_size + 1), |
| 426 | GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | if (!new_snoop_table) { |
| 428 | i = -ENOMEM; |
| 429 | goto out; |
| 430 | } |
Roland Dreier | 5280517 | 2008-10-14 14:05:36 -0700 | [diff] [blame] | 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | qp_info->snoop_table = new_snoop_table; |
| 433 | qp_info->snoop_table_size++; |
| 434 | } |
| 435 | qp_info->snoop_table[i] = mad_snoop_priv; |
| 436 | atomic_inc(&qp_info->snoop_count); |
| 437 | out: |
| 438 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 439 | return i; |
| 440 | } |
| 441 | |
| 442 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, |
| 443 | u8 port_num, |
| 444 | enum ib_qp_type qp_type, |
| 445 | int mad_snoop_flags, |
| 446 | ib_mad_snoop_handler snoop_handler, |
| 447 | ib_mad_recv_handler recv_handler, |
| 448 | void *context) |
| 449 | { |
| 450 | struct ib_mad_port_private *port_priv; |
| 451 | struct ib_mad_agent *ret; |
| 452 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 453 | int qpn; |
| 454 | |
| 455 | /* Validate parameters */ |
| 456 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || |
| 457 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { |
| 458 | ret = ERR_PTR(-EINVAL); |
| 459 | goto error1; |
| 460 | } |
| 461 | qpn = get_spl_qp_index(qp_type); |
| 462 | if (qpn == -1) { |
| 463 | ret = ERR_PTR(-EINVAL); |
| 464 | goto error1; |
| 465 | } |
| 466 | port_priv = ib_get_mad_port(device, port_num); |
| 467 | if (!port_priv) { |
| 468 | ret = ERR_PTR(-ENODEV); |
| 469 | goto error1; |
| 470 | } |
| 471 | /* Allocate structures */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 472 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | if (!mad_snoop_priv) { |
| 474 | ret = ERR_PTR(-ENOMEM); |
| 475 | goto error1; |
| 476 | } |
| 477 | |
| 478 | /* Now, fill in the various structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
| 480 | mad_snoop_priv->agent.device = device; |
| 481 | mad_snoop_priv->agent.recv_handler = recv_handler; |
| 482 | mad_snoop_priv->agent.snoop_handler = snoop_handler; |
| 483 | mad_snoop_priv->agent.context = context; |
| 484 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| 485 | mad_snoop_priv->agent.port_num = port_num; |
| 486 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 487 | init_completion(&mad_snoop_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | mad_snoop_priv->snoop_index = register_snoop_agent( |
| 489 | &port_priv->qp_info[qpn], |
| 490 | mad_snoop_priv); |
| 491 | if (mad_snoop_priv->snoop_index < 0) { |
| 492 | ret = ERR_PTR(mad_snoop_priv->snoop_index); |
| 493 | goto error2; |
| 494 | } |
| 495 | |
| 496 | atomic_set(&mad_snoop_priv->refcount, 1); |
| 497 | return &mad_snoop_priv->agent; |
| 498 | |
| 499 | error2: |
| 500 | kfree(mad_snoop_priv); |
| 501 | error1: |
| 502 | return ret; |
| 503 | } |
| 504 | EXPORT_SYMBOL(ib_register_mad_snoop); |
| 505 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 506 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| 507 | { |
| 508 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| 509 | complete(&mad_agent_priv->comp); |
| 510 | } |
| 511 | |
| 512 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) |
| 513 | { |
| 514 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
| 515 | complete(&mad_snoop_priv->comp); |
| 516 | } |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| 519 | { |
| 520 | struct ib_mad_port_private *port_priv; |
| 521 | unsigned long flags; |
| 522 | |
| 523 | /* Note that we could still be handling received MADs */ |
| 524 | |
| 525 | /* |
| 526 | * Canceling all sends results in dropping received response |
| 527 | * MADs, preventing us from queuing additional work |
| 528 | */ |
| 529 | cancel_mads(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | port_priv = mad_agent_priv->qp_info->port_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
| 533 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
| 534 | remove_mad_reg_req(mad_agent_priv); |
| 535 | list_del(&mad_agent_priv->agent_list); |
| 536 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 537 | |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 538 | flush_workqueue(port_priv->wq); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 539 | ib_cancel_rmpp_recvs(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 541 | deref_mad_agent(mad_agent_priv); |
| 542 | wait_for_completion(&mad_agent_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 544 | kfree(mad_agent_priv->reg_req); |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 545 | ib_dereg_mr(mad_agent_priv->agent.mr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | kfree(mad_agent_priv); |
| 547 | } |
| 548 | |
| 549 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) |
| 550 | { |
| 551 | struct ib_mad_qp_info *qp_info; |
| 552 | unsigned long flags; |
| 553 | |
| 554 | qp_info = mad_snoop_priv->qp_info; |
| 555 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 556 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; |
| 557 | atomic_dec(&qp_info->snoop_count); |
| 558 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 559 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 560 | deref_snoop_agent(mad_snoop_priv); |
| 561 | wait_for_completion(&mad_snoop_priv->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | kfree(mad_snoop_priv); |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * ib_unregister_mad_agent - Unregisters a client from using MAD services |
| 568 | */ |
| 569 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
| 570 | { |
| 571 | struct ib_mad_agent_private *mad_agent_priv; |
| 572 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 573 | |
| 574 | /* If the TID is zero, the agent can only snoop. */ |
| 575 | if (mad_agent->hi_tid) { |
| 576 | mad_agent_priv = container_of(mad_agent, |
| 577 | struct ib_mad_agent_private, |
| 578 | agent); |
| 579 | unregister_mad_agent(mad_agent_priv); |
| 580 | } else { |
| 581 | mad_snoop_priv = container_of(mad_agent, |
| 582 | struct ib_mad_snoop_private, |
| 583 | agent); |
| 584 | unregister_mad_snoop(mad_snoop_priv); |
| 585 | } |
| 586 | return 0; |
| 587 | } |
| 588 | EXPORT_SYMBOL(ib_unregister_mad_agent); |
| 589 | |
| 590 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
| 591 | { |
| 592 | struct ib_mad_queue *mad_queue; |
| 593 | unsigned long flags; |
| 594 | |
| 595 | BUG_ON(!mad_list->mad_queue); |
| 596 | mad_queue = mad_list->mad_queue; |
| 597 | spin_lock_irqsave(&mad_queue->lock, flags); |
| 598 | list_del(&mad_list->list); |
| 599 | mad_queue->count--; |
| 600 | spin_unlock_irqrestore(&mad_queue->lock, flags); |
| 601 | } |
| 602 | |
| 603 | static void snoop_send(struct ib_mad_qp_info *qp_info, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 604 | struct ib_mad_send_buf *send_buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | struct ib_mad_send_wc *mad_send_wc, |
| 606 | int mad_snoop_flags) |
| 607 | { |
| 608 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 609 | unsigned long flags; |
| 610 | int i; |
| 611 | |
| 612 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 613 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 614 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 615 | if (!mad_snoop_priv || |
| 616 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 617 | continue; |
| 618 | |
| 619 | atomic_inc(&mad_snoop_priv->refcount); |
| 620 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 621 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 622 | send_buf, mad_send_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 623 | deref_snoop_agent(mad_snoop_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 625 | } |
| 626 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 627 | } |
| 628 | |
| 629 | static void snoop_recv(struct ib_mad_qp_info *qp_info, |
| 630 | struct ib_mad_recv_wc *mad_recv_wc, |
| 631 | int mad_snoop_flags) |
| 632 | { |
| 633 | struct ib_mad_snoop_private *mad_snoop_priv; |
| 634 | unsigned long flags; |
| 635 | int i; |
| 636 | |
| 637 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 638 | for (i = 0; i < qp_info->snoop_table_size; i++) { |
| 639 | mad_snoop_priv = qp_info->snoop_table[i]; |
| 640 | if (!mad_snoop_priv || |
| 641 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| 642 | continue; |
| 643 | |
| 644 | atomic_inc(&mad_snoop_priv->refcount); |
| 645 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 646 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, |
| 647 | mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 648 | deref_snoop_agent(mad_snoop_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| 650 | } |
| 651 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| 652 | } |
| 653 | |
Michael S. Tsirkin | 062dbb6 | 2006-12-31 21:09:42 +0200 | [diff] [blame] | 654 | static void build_smp_wc(struct ib_qp *qp, |
| 655 | u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | struct ib_wc *wc) |
| 657 | { |
| 658 | memset(wc, 0, sizeof *wc); |
| 659 | wc->wr_id = wr_id; |
| 660 | wc->status = IB_WC_SUCCESS; |
| 661 | wc->opcode = IB_WC_RECV; |
| 662 | wc->pkey_index = pkey_index; |
| 663 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); |
| 664 | wc->src_qp = IB_QP0; |
Michael S. Tsirkin | 062dbb6 | 2006-12-31 21:09:42 +0200 | [diff] [blame] | 665 | wc->qp = qp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | wc->slid = slid; |
| 667 | wc->sl = 0; |
| 668 | wc->dlid_path_bits = 0; |
| 669 | wc->port_num = port_num; |
| 670 | } |
| 671 | |
| 672 | /* |
| 673 | * Return 0 if SMP is to be sent |
| 674 | * Return 1 if SMP was consumed locally (whether or not solicited) |
| 675 | * Return < 0 if error |
| 676 | */ |
| 677 | 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] | 678 | struct ib_mad_send_wr_private *mad_send_wr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 680 | int ret = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 681 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | unsigned long flags; |
| 683 | struct ib_mad_local_private *local; |
| 684 | struct ib_mad_private *mad_priv; |
| 685 | struct ib_mad_port_private *port_priv; |
| 686 | struct ib_mad_agent_private *recv_mad_agent = NULL; |
| 687 | struct ib_device *device = mad_agent_priv->agent.device; |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 688 | u8 port_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | struct ib_wc mad_wc; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 690 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 692 | if (device->node_type == RDMA_NODE_IB_SWITCH && |
| 693 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
| 694 | port_num = send_wr->wr.ud.port_num; |
| 695 | else |
| 696 | port_num = mad_agent_priv->agent.port_num; |
| 697 | |
Ralph Campbell | 8cf3f04 | 2006-02-03 14:28:48 -0800 | [diff] [blame] | 698 | /* |
| 699 | * Directed route handling starts if the initial LID routed part of |
| 700 | * a request or the ending LID routed part of a response is empty. |
| 701 | * If we are at the start of the LID routed part, don't update the |
| 702 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. |
| 703 | */ |
| 704 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == |
| 705 | IB_LID_PERMISSIVE && |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 706 | smi_handle_dr_smp_send(smp, device->node_type, port_num) == |
| 707 | IB_SMI_DISCARD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | ret = -EINVAL; |
| 709 | printk(KERN_ERR PFX "Invalid directed route\n"); |
| 710 | goto out; |
| 711 | } |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | /* Check to post send on QP or process locally */ |
Steve Welch | 727792d | 2007-10-23 15:06:10 -0700 | [diff] [blame] | 714 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && |
| 715 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | goto out; |
| 717 | |
| 718 | local = kmalloc(sizeof *local, GFP_ATOMIC); |
| 719 | if (!local) { |
| 720 | ret = -ENOMEM; |
| 721 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); |
| 722 | goto out; |
| 723 | } |
| 724 | local->mad_priv = NULL; |
| 725 | local->recv_mad_agent = NULL; |
| 726 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); |
| 727 | if (!mad_priv) { |
| 728 | ret = -ENOMEM; |
| 729 | printk(KERN_ERR PFX "No memory for local response MAD\n"); |
| 730 | kfree(local); |
| 731 | goto out; |
| 732 | } |
| 733 | |
Michael S. Tsirkin | 062dbb6 | 2006-12-31 21:09:42 +0200 | [diff] [blame] | 734 | build_smp_wc(mad_agent_priv->agent.qp, |
| 735 | send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 736 | send_wr->wr.ud.pkey_index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | send_wr->wr.ud.port_num, &mad_wc); |
| 738 | |
| 739 | /* No GRH for DR SMP */ |
| 740 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, |
| 741 | (struct ib_mad *)smp, |
| 742 | (struct ib_mad *)&mad_priv->mad); |
| 743 | switch (ret) |
| 744 | { |
| 745 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 746 | if (ib_response_mad(&mad_priv->mad.mad) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | mad_agent_priv->agent.recv_handler) { |
| 748 | local->mad_priv = mad_priv; |
| 749 | local->recv_mad_agent = mad_agent_priv; |
| 750 | /* |
| 751 | * Reference MAD agent until receive |
| 752 | * side of local completion handled |
| 753 | */ |
| 754 | atomic_inc(&mad_agent_priv->refcount); |
| 755 | } else |
| 756 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 757 | break; |
| 758 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: |
| 759 | kmem_cache_free(ib_mad_cache, mad_priv); |
Ralph Campbell | 4780c19 | 2009-03-03 14:22:17 -0800 | [diff] [blame] | 760 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | case IB_MAD_RESULT_SUCCESS: |
| 762 | /* Treat like an incoming receive MAD */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
| 764 | mad_agent_priv->agent.port_num); |
| 765 | if (port_priv) { |
Steve Welch | 727792d | 2007-10-23 15:06:10 -0700 | [diff] [blame] | 766 | memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | recv_mad_agent = find_mad_agent(port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 768 | &mad_priv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | if (!port_priv || !recv_mad_agent) { |
Ralph Campbell | 4780c19 | 2009-03-03 14:22:17 -0800 | [diff] [blame] | 771 | /* |
| 772 | * No receiving agent so drop packet and |
| 773 | * generate send completion. |
| 774 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | kmem_cache_free(ib_mad_cache, mad_priv); |
Ralph Campbell | 4780c19 | 2009-03-03 14:22:17 -0800 | [diff] [blame] | 776 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | local->mad_priv = mad_priv; |
| 779 | local->recv_mad_agent = recv_mad_agent; |
| 780 | break; |
| 781 | default: |
| 782 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 783 | kfree(local); |
| 784 | ret = -EINVAL; |
| 785 | goto out; |
| 786 | } |
| 787 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 788 | local->mad_send_wr = mad_send_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | /* Reference MAD agent until send side of local completion handled */ |
| 790 | atomic_inc(&mad_agent_priv->refcount); |
| 791 | /* Queue local completion to local list */ |
| 792 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 793 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); |
| 794 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 795 | queue_work(mad_agent_priv->qp_info->port_priv->wq, |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 796 | &mad_agent_priv->local_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | ret = 1; |
| 798 | out: |
| 799 | return ret; |
| 800 | } |
| 801 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 802 | static int get_pad_size(int hdr_len, int data_len) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 803 | { |
| 804 | int seg_size, pad; |
| 805 | |
| 806 | seg_size = sizeof(struct ib_mad) - hdr_len; |
| 807 | if (data_len && seg_size) { |
| 808 | pad = seg_size - data_len % seg_size; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 809 | return pad == seg_size ? 0 : pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 810 | } else |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 811 | return seg_size; |
| 812 | } |
| 813 | |
| 814 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) |
| 815 | { |
| 816 | struct ib_rmpp_segment *s, *t; |
| 817 | |
| 818 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { |
| 819 | list_del(&s->list); |
| 820 | kfree(s); |
| 821 | } |
| 822 | } |
| 823 | |
| 824 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, |
| 825 | gfp_t gfp_mask) |
| 826 | { |
| 827 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; |
| 828 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; |
| 829 | struct ib_rmpp_segment *seg = NULL; |
| 830 | int left, seg_size, pad; |
| 831 | |
| 832 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; |
| 833 | seg_size = send_buf->seg_size; |
| 834 | pad = send_wr->pad; |
| 835 | |
| 836 | /* Allocate data segments. */ |
| 837 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { |
| 838 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); |
| 839 | if (!seg) { |
| 840 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " |
| 841 | "alloc failed for len %zd, gfp %#x\n", |
| 842 | sizeof (*seg) + seg_size, gfp_mask); |
| 843 | free_send_rmpp_list(send_wr); |
| 844 | return -ENOMEM; |
| 845 | } |
| 846 | seg->num = ++send_buf->seg_count; |
| 847 | list_add_tail(&seg->list, &send_wr->rmpp_list); |
| 848 | } |
| 849 | |
| 850 | /* Zero any padding */ |
| 851 | if (pad) |
| 852 | memset(seg->data + seg_size - pad, 0, pad); |
| 853 | |
| 854 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> |
| 855 | agent.rmpp_version; |
| 856 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; |
| 857 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| 858 | |
| 859 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, |
| 860 | struct ib_rmpp_segment, list); |
| 861 | send_wr->last_ack_seg = send_wr->cur_seg; |
| 862 | return 0; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
| 866 | u32 remote_qpn, u16 pkey_index, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 867 | int rmpp_active, |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 868 | int hdr_len, int data_len, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 869 | gfp_t gfp_mask) |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 870 | { |
| 871 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 872 | struct ib_mad_send_wr_private *mad_send_wr; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 873 | int pad, message_size, ret, size; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 874 | void *buf; |
| 875 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 876 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 877 | agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 878 | pad = get_pad_size(hdr_len, data_len); |
| 879 | message_size = hdr_len + data_len + pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 880 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 881 | if ((!mad_agent->rmpp_version && |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 882 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
| 883 | (!rmpp_active && message_size > sizeof(struct ib_mad))) |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 884 | return ERR_PTR(-EINVAL); |
| 885 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 886 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
| 887 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 888 | if (!buf) |
| 889 | return ERR_PTR(-ENOMEM); |
| 890 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 891 | mad_send_wr = buf + size; |
| 892 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 893 | mad_send_wr->send_buf.mad = buf; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 894 | mad_send_wr->send_buf.hdr_len = hdr_len; |
| 895 | mad_send_wr->send_buf.data_len = data_len; |
| 896 | mad_send_wr->pad = pad; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 897 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 898 | mad_send_wr->mad_agent_priv = mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 899 | mad_send_wr->sg_list[0].length = hdr_len; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 900 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 901 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
| 902 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 903 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 904 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; |
| 905 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 906 | mad_send_wr->send_wr.num_sge = 2; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 907 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
| 908 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; |
| 909 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; |
| 910 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; |
| 911 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 912 | |
| 913 | if (rmpp_active) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 914 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
| 915 | if (ret) { |
| 916 | kfree(buf); |
| 917 | return ERR_PTR(ret); |
| 918 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 919 | } |
| 920 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 921 | mad_send_wr->send_buf.mad_agent = mad_agent; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 922 | atomic_inc(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 923 | return &mad_send_wr->send_buf; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 924 | } |
| 925 | EXPORT_SYMBOL(ib_create_send_mad); |
| 926 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 927 | int ib_get_mad_data_offset(u8 mgmt_class) |
| 928 | { |
| 929 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) |
| 930 | return IB_MGMT_SA_HDR; |
| 931 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
| 932 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
| 933 | (mgmt_class == IB_MGMT_CLASS_BIS)) |
| 934 | return IB_MGMT_DEVICE_HDR; |
| 935 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
| 936 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
| 937 | return IB_MGMT_VENDOR_HDR; |
| 938 | else |
| 939 | return IB_MGMT_MAD_HDR; |
| 940 | } |
| 941 | EXPORT_SYMBOL(ib_get_mad_data_offset); |
| 942 | |
| 943 | int ib_is_mad_class_rmpp(u8 mgmt_class) |
| 944 | { |
| 945 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || |
| 946 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
| 947 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
| 948 | (mgmt_class == IB_MGMT_CLASS_BIS) || |
| 949 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
| 950 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) |
| 951 | return 1; |
| 952 | return 0; |
| 953 | } |
| 954 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); |
| 955 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 956 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
| 957 | { |
| 958 | struct ib_mad_send_wr_private *mad_send_wr; |
| 959 | struct list_head *list; |
| 960 | |
| 961 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 962 | send_buf); |
| 963 | list = &mad_send_wr->cur_seg->list; |
| 964 | |
| 965 | if (mad_send_wr->cur_seg->num < seg_num) { |
| 966 | list_for_each_entry(mad_send_wr->cur_seg, list, list) |
| 967 | if (mad_send_wr->cur_seg->num == seg_num) |
| 968 | break; |
| 969 | } else if (mad_send_wr->cur_seg->num > seg_num) { |
| 970 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) |
| 971 | if (mad_send_wr->cur_seg->num == seg_num) |
| 972 | break; |
| 973 | } |
| 974 | return mad_send_wr->cur_seg->data; |
| 975 | } |
| 976 | EXPORT_SYMBOL(ib_get_rmpp_segment); |
| 977 | |
| 978 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) |
| 979 | { |
| 980 | if (mad_send_wr->send_buf.seg_count) |
| 981 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, |
| 982 | mad_send_wr->seg_num); |
| 983 | else |
| 984 | return mad_send_wr->send_buf.mad + |
| 985 | mad_send_wr->send_buf.hdr_len; |
| 986 | } |
| 987 | |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 988 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
| 989 | { |
| 990 | struct ib_mad_agent_private *mad_agent_priv; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 991 | struct ib_mad_send_wr_private *mad_send_wr; |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 992 | |
| 993 | mad_agent_priv = container_of(send_buf->mad_agent, |
| 994 | struct ib_mad_agent_private, agent); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 995 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
| 996 | send_buf); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 997 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 998 | free_send_rmpp_list(mad_send_wr); |
| 999 | kfree(send_buf->mad); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1000 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | 824c8ae | 2005-07-27 11:45:23 -0700 | [diff] [blame] | 1001 | } |
| 1002 | EXPORT_SYMBOL(ib_free_send_mad); |
| 1003 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1004 | 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] | 1005 | { |
| 1006 | struct ib_mad_qp_info *qp_info; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1007 | struct list_head *list; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1008 | struct ib_send_wr *bad_send_wr; |
| 1009 | struct ib_mad_agent *mad_agent; |
| 1010 | struct ib_sge *sge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | unsigned long flags; |
| 1012 | int ret; |
| 1013 | |
Hal Rosenstock | f8197a4 | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1014 | /* Set WR ID to find mad_send_wr upon completion */ |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 1015 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
| 1017 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
| 1018 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1019 | mad_agent = mad_send_wr->send_buf.mad_agent; |
| 1020 | sge = mad_send_wr->sg_list; |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 1021 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
| 1022 | mad_send_wr->send_buf.mad, |
| 1023 | sge[0].length, |
| 1024 | DMA_TO_DEVICE); |
| 1025 | mad_send_wr->header_mapping = sge[0].addr; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1026 | |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 1027 | sge[1].addr = ib_dma_map_single(mad_agent->device, |
| 1028 | ib_get_payload(mad_send_wr), |
| 1029 | sge[1].length, |
| 1030 | DMA_TO_DEVICE); |
| 1031 | mad_send_wr->payload_mapping = sge[1].addr; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1032 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1034 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1035 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
| 1036 | &bad_send_wr); |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1037 | list = &qp_info->send_queue.list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | ret = 0; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1040 | list = &qp_info->overflow_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 1042 | |
| 1043 | if (!ret) { |
| 1044 | qp_info->send_queue.count++; |
| 1045 | list_add_tail(&mad_send_wr->mad_list.list, list); |
| 1046 | } |
| 1047 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1048 | if (ret) { |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 1049 | ib_dma_unmap_single(mad_agent->device, |
| 1050 | mad_send_wr->header_mapping, |
| 1051 | sge[0].length, DMA_TO_DEVICE); |
| 1052 | ib_dma_unmap_single(mad_agent->device, |
| 1053 | mad_send_wr->payload_mapping, |
| 1054 | sge[1].length, DMA_TO_DEVICE); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 1055 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | return ret; |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated |
| 1061 | * with the registered client |
| 1062 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1063 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
| 1064 | struct ib_mad_send_buf **bad_send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | struct ib_mad_agent_private *mad_agent_priv; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1067 | struct ib_mad_send_buf *next_send_buf; |
| 1068 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1069 | unsigned long flags; |
| 1070 | int ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
| 1072 | /* Walk list of send WRs and post each on send list */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1073 | for (; send_buf; send_buf = next_send_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1075 | mad_send_wr = container_of(send_buf, |
| 1076 | struct ib_mad_send_wr_private, |
| 1077 | send_buf); |
| 1078 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1080 | if (!send_buf->mad_agent->send_handler || |
| 1081 | (send_buf->timeout_ms && |
| 1082 | !send_buf->mad_agent->recv_handler)) { |
| 1083 | ret = -EINVAL; |
| 1084 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | } |
| 1086 | |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 1087 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
| 1088 | if (mad_agent_priv->agent.rmpp_version) { |
| 1089 | ret = -EINVAL; |
| 1090 | goto error; |
| 1091 | } |
| 1092 | } |
| 1093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | /* |
| 1095 | * Save pointer to next work request to post in case the |
| 1096 | * current one completes, and the user modifies the work |
| 1097 | * request associated with the completion |
| 1098 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1099 | next_send_buf = send_buf->next; |
| 1100 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1102 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
| 1103 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| 1104 | ret = handle_outgoing_dr_smp(mad_agent_priv, |
| 1105 | mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | if (ret < 0) /* error */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1107 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | else if (ret == 1) /* locally consumed */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1109 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1112 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | /* Timeout will be updated after send completes */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1114 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
Sean Hefty | 4fc8cd4 | 2007-11-27 00:11:04 -0800 | [diff] [blame] | 1115 | mad_send_wr->max_retries = send_buf->retries; |
| 1116 | mad_send_wr->retries_left = send_buf->retries; |
| 1117 | send_buf->retries = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1118 | /* Reference for work request to QP + response */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
| 1120 | mad_send_wr->status = IB_WC_SUCCESS; |
| 1121 | |
| 1122 | /* Reference MAD agent until send completes */ |
| 1123 | atomic_inc(&mad_agent_priv->refcount); |
| 1124 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1125 | list_add_tail(&mad_send_wr->agent_list, |
| 1126 | &mad_agent_priv->send_list); |
| 1127 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1128 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1129 | if (mad_agent_priv->agent.rmpp_version) { |
| 1130 | ret = ib_send_rmpp_mad(mad_send_wr); |
| 1131 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) |
| 1132 | ret = ib_send_mad(mad_send_wr); |
| 1133 | } else |
| 1134 | ret = ib_send_mad(mad_send_wr); |
| 1135 | if (ret < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | /* Fail send request */ |
| 1137 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 1138 | list_del(&mad_send_wr->agent_list); |
| 1139 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1140 | atomic_dec(&mad_agent_priv->refcount); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1141 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | } |
| 1144 | return 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1145 | error: |
| 1146 | if (bad_send_buf) |
| 1147 | *bad_send_buf = send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | return ret; |
| 1149 | } |
| 1150 | EXPORT_SYMBOL(ib_post_send_mad); |
| 1151 | |
| 1152 | /* |
| 1153 | * ib_free_recv_mad - Returns data buffers used to receive |
| 1154 | * a MAD to the access layer |
| 1155 | */ |
| 1156 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) |
| 1157 | { |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1158 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | struct ib_mad_private_header *mad_priv_hdr; |
| 1160 | struct ib_mad_private *priv; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1161 | struct list_head free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1163 | INIT_LIST_HEAD(&free_list); |
| 1164 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1166 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
| 1167 | &free_list, list) { |
| 1168 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, |
| 1169 | recv_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | mad_priv_hdr = container_of(mad_recv_wc, |
| 1171 | struct ib_mad_private_header, |
| 1172 | recv_wc); |
| 1173 | priv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 1174 | header); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1175 | kmem_cache_free(ib_mad_cache, priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | EXPORT_SYMBOL(ib_free_recv_mad); |
| 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
| 1181 | u8 rmpp_version, |
| 1182 | ib_mad_send_handler send_handler, |
| 1183 | ib_mad_recv_handler recv_handler, |
| 1184 | void *context) |
| 1185 | { |
| 1186 | return ERR_PTR(-EINVAL); /* XXX: for now */ |
| 1187 | } |
| 1188 | EXPORT_SYMBOL(ib_redirect_mad_qp); |
| 1189 | |
| 1190 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, |
| 1191 | struct ib_wc *wc) |
| 1192 | { |
| 1193 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); |
| 1194 | return 0; |
| 1195 | } |
| 1196 | EXPORT_SYMBOL(ib_process_mad_wc); |
| 1197 | |
| 1198 | static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| 1199 | struct ib_mad_reg_req *mad_reg_req) |
| 1200 | { |
| 1201 | int i; |
| 1202 | |
Akinobu Mita | 19b629f | 2010-03-05 13:41:38 -0800 | [diff] [blame] | 1203 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if ((*method)->agent[i]) { |
| 1205 | printk(KERN_ERR PFX "Method %d already in use\n", i); |
| 1206 | return -EINVAL; |
| 1207 | } |
| 1208 | } |
| 1209 | return 0; |
| 1210 | } |
| 1211 | |
| 1212 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) |
| 1213 | { |
| 1214 | /* Allocate management method table */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1215 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | if (!*method) { |
| 1217 | printk(KERN_ERR PFX "No memory for " |
| 1218 | "ib_mad_mgmt_method_table\n"); |
| 1219 | return -ENOMEM; |
| 1220 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | |
| 1222 | return 0; |
| 1223 | } |
| 1224 | |
| 1225 | /* |
| 1226 | * Check to see if there are any methods still in use |
| 1227 | */ |
| 1228 | static int check_method_table(struct ib_mad_mgmt_method_table *method) |
| 1229 | { |
| 1230 | int i; |
| 1231 | |
| 1232 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) |
| 1233 | if (method->agent[i]) |
| 1234 | return 1; |
| 1235 | return 0; |
| 1236 | } |
| 1237 | |
| 1238 | /* |
| 1239 | * Check to see if there are any method tables for this class still in use |
| 1240 | */ |
| 1241 | static int check_class_table(struct ib_mad_mgmt_class_table *class) |
| 1242 | { |
| 1243 | int i; |
| 1244 | |
| 1245 | for (i = 0; i < MAX_MGMT_CLASS; i++) |
| 1246 | if (class->method_table[i]) |
| 1247 | return 1; |
| 1248 | return 0; |
| 1249 | } |
| 1250 | |
| 1251 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) |
| 1252 | { |
| 1253 | int i; |
| 1254 | |
| 1255 | for (i = 0; i < MAX_MGMT_OUI; i++) |
| 1256 | if (vendor_class->method_table[i]) |
| 1257 | return 1; |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, |
| 1262 | char *oui) |
| 1263 | { |
| 1264 | int i; |
| 1265 | |
| 1266 | for (i = 0; i < MAX_MGMT_OUI; i++) |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 1267 | /* Is there matching OUI for this vendor class ? */ |
| 1268 | if (!memcmp(vendor_class->oui[i], oui, 3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | return i; |
| 1270 | |
| 1271 | return -1; |
| 1272 | } |
| 1273 | |
| 1274 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) |
| 1275 | { |
| 1276 | int i; |
| 1277 | |
| 1278 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) |
| 1279 | if (vendor->vendor_class[i]) |
| 1280 | return 1; |
| 1281 | |
| 1282 | return 0; |
| 1283 | } |
| 1284 | |
| 1285 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, |
| 1286 | struct ib_mad_agent_private *agent) |
| 1287 | { |
| 1288 | int i; |
| 1289 | |
| 1290 | /* Remove any methods for this mad agent */ |
| 1291 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { |
| 1292 | if (method->agent[i] == agent) { |
| 1293 | method->agent[i] = NULL; |
| 1294 | } |
| 1295 | } |
| 1296 | } |
| 1297 | |
| 1298 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1299 | struct ib_mad_agent_private *agent_priv, |
| 1300 | u8 mgmt_class) |
| 1301 | { |
| 1302 | struct ib_mad_port_private *port_priv; |
| 1303 | struct ib_mad_mgmt_class_table **class; |
| 1304 | struct ib_mad_mgmt_method_table **method; |
| 1305 | int i, ret; |
| 1306 | |
| 1307 | port_priv = agent_priv->qp_info->port_priv; |
| 1308 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; |
| 1309 | if (!*class) { |
| 1310 | /* Allocate management class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1311 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | if (!*class) { |
| 1313 | printk(KERN_ERR PFX "No memory for " |
| 1314 | "ib_mad_mgmt_class_table\n"); |
| 1315 | ret = -ENOMEM; |
| 1316 | goto error1; |
| 1317 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | /* Allocate method table for this management class */ |
| 1320 | method = &(*class)->method_table[mgmt_class]; |
| 1321 | if ((ret = allocate_method_table(method))) |
| 1322 | goto error2; |
| 1323 | } else { |
| 1324 | method = &(*class)->method_table[mgmt_class]; |
| 1325 | if (!*method) { |
| 1326 | /* Allocate method table for this management class */ |
| 1327 | if ((ret = allocate_method_table(method))) |
| 1328 | goto error1; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | /* Now, make sure methods are not already in use */ |
| 1333 | if (method_in_use(method, mad_reg_req)) |
| 1334 | goto error3; |
| 1335 | |
| 1336 | /* Finally, add in methods being registered */ |
Akinobu Mita | 19b629f | 2010-03-05 13:41:38 -0800 | [diff] [blame] | 1337 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | (*method)->agent[i] = agent_priv; |
Akinobu Mita | 19b629f | 2010-03-05 13:41:38 -0800 | [diff] [blame] | 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | return 0; |
| 1341 | |
| 1342 | error3: |
| 1343 | /* Remove any methods for this mad agent */ |
| 1344 | remove_methods_mad_agent(*method, agent_priv); |
| 1345 | /* Now, check to see if there are any methods in use */ |
| 1346 | if (!check_method_table(*method)) { |
| 1347 | /* If not, release management method table */ |
| 1348 | kfree(*method); |
| 1349 | *method = NULL; |
| 1350 | } |
| 1351 | ret = -EINVAL; |
| 1352 | goto error1; |
| 1353 | error2: |
| 1354 | kfree(*class); |
| 1355 | *class = NULL; |
| 1356 | error1: |
| 1357 | return ret; |
| 1358 | } |
| 1359 | |
| 1360 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| 1361 | struct ib_mad_agent_private *agent_priv) |
| 1362 | { |
| 1363 | struct ib_mad_port_private *port_priv; |
| 1364 | struct ib_mad_mgmt_vendor_class_table **vendor_table; |
| 1365 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; |
| 1366 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; |
| 1367 | struct ib_mad_mgmt_method_table **method; |
| 1368 | int i, ret = -ENOMEM; |
| 1369 | u8 vclass; |
| 1370 | |
| 1371 | /* "New" vendor (with OUI) class */ |
| 1372 | vclass = vendor_class_index(mad_reg_req->mgmt_class); |
| 1373 | port_priv = agent_priv->qp_info->port_priv; |
| 1374 | vendor_table = &port_priv->version[ |
| 1375 | mad_reg_req->mgmt_class_version].vendor; |
| 1376 | if (!*vendor_table) { |
| 1377 | /* Allocate mgmt vendor class table for "new" class version */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1378 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | if (!vendor) { |
| 1380 | printk(KERN_ERR PFX "No memory for " |
| 1381 | "ib_mad_mgmt_vendor_class_table\n"); |
| 1382 | goto error1; |
| 1383 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | *vendor_table = vendor; |
| 1386 | } |
| 1387 | if (!(*vendor_table)->vendor_class[vclass]) { |
| 1388 | /* Allocate table for this management vendor class */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1389 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | if (!vendor_class) { |
| 1391 | printk(KERN_ERR PFX "No memory for " |
| 1392 | "ib_mad_mgmt_vendor_class\n"); |
| 1393 | goto error2; |
| 1394 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
| 1397 | } |
| 1398 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1399 | /* Is there matching OUI for this vendor class ? */ |
| 1400 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1401 | mad_reg_req->oui, 3)) { |
| 1402 | method = &(*vendor_table)->vendor_class[ |
| 1403 | vclass]->method_table[i]; |
| 1404 | BUG_ON(!*method); |
| 1405 | goto check_in_use; |
| 1406 | } |
| 1407 | } |
| 1408 | for (i = 0; i < MAX_MGMT_OUI; i++) { |
| 1409 | /* OUI slot available ? */ |
| 1410 | if (!is_vendor_oui((*vendor_table)->vendor_class[ |
| 1411 | vclass]->oui[i])) { |
| 1412 | method = &(*vendor_table)->vendor_class[ |
| 1413 | vclass]->method_table[i]; |
| 1414 | BUG_ON(*method); |
| 1415 | /* Allocate method table for this OUI */ |
| 1416 | if ((ret = allocate_method_table(method))) |
| 1417 | goto error3; |
| 1418 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], |
| 1419 | mad_reg_req->oui, 3); |
| 1420 | goto check_in_use; |
| 1421 | } |
| 1422 | } |
| 1423 | printk(KERN_ERR PFX "All OUI slots in use\n"); |
| 1424 | goto error3; |
| 1425 | |
| 1426 | check_in_use: |
| 1427 | /* Now, make sure methods are not already in use */ |
| 1428 | if (method_in_use(method, mad_reg_req)) |
| 1429 | goto error4; |
| 1430 | |
| 1431 | /* Finally, add in methods being registered */ |
Akinobu Mita | 19b629f | 2010-03-05 13:41:38 -0800 | [diff] [blame] | 1432 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | (*method)->agent[i] = agent_priv; |
Akinobu Mita | 19b629f | 2010-03-05 13:41:38 -0800 | [diff] [blame] | 1434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | return 0; |
| 1436 | |
| 1437 | error4: |
| 1438 | /* Remove any methods for this mad agent */ |
| 1439 | remove_methods_mad_agent(*method, agent_priv); |
| 1440 | /* Now, check to see if there are any methods in use */ |
| 1441 | if (!check_method_table(*method)) { |
| 1442 | /* If not, release management method table */ |
| 1443 | kfree(*method); |
| 1444 | *method = NULL; |
| 1445 | } |
| 1446 | ret = -EINVAL; |
| 1447 | error3: |
| 1448 | if (vendor_class) { |
| 1449 | (*vendor_table)->vendor_class[vclass] = NULL; |
| 1450 | kfree(vendor_class); |
| 1451 | } |
| 1452 | error2: |
| 1453 | if (vendor) { |
| 1454 | *vendor_table = NULL; |
| 1455 | kfree(vendor); |
| 1456 | } |
| 1457 | error1: |
| 1458 | return ret; |
| 1459 | } |
| 1460 | |
| 1461 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) |
| 1462 | { |
| 1463 | struct ib_mad_port_private *port_priv; |
| 1464 | struct ib_mad_mgmt_class_table *class; |
| 1465 | struct ib_mad_mgmt_method_table *method; |
| 1466 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1467 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1468 | int index; |
| 1469 | u8 mgmt_class; |
| 1470 | |
| 1471 | /* |
| 1472 | * Was MAD registration request supplied |
| 1473 | * with original registration ? |
| 1474 | */ |
| 1475 | if (!agent_priv->reg_req) { |
| 1476 | goto out; |
| 1477 | } |
| 1478 | |
| 1479 | port_priv = agent_priv->qp_info->port_priv; |
| 1480 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); |
| 1481 | class = port_priv->version[ |
| 1482 | agent_priv->reg_req->mgmt_class_version].class; |
| 1483 | if (!class) |
| 1484 | goto vendor_check; |
| 1485 | |
| 1486 | method = class->method_table[mgmt_class]; |
| 1487 | if (method) { |
| 1488 | /* Remove any methods for this mad agent */ |
| 1489 | remove_methods_mad_agent(method, agent_priv); |
| 1490 | /* Now, check to see if there are any methods still in use */ |
| 1491 | if (!check_method_table(method)) { |
| 1492 | /* If not, release management method table */ |
| 1493 | kfree(method); |
| 1494 | class->method_table[mgmt_class] = NULL; |
| 1495 | /* Any management classes left ? */ |
| 1496 | if (!check_class_table(class)) { |
| 1497 | /* If not, release management class table */ |
| 1498 | kfree(class); |
| 1499 | port_priv->version[ |
| 1500 | agent_priv->reg_req-> |
| 1501 | mgmt_class_version].class = NULL; |
| 1502 | } |
| 1503 | } |
| 1504 | } |
| 1505 | |
| 1506 | vendor_check: |
| 1507 | if (!is_vendor_class(mgmt_class)) |
| 1508 | goto out; |
| 1509 | |
| 1510 | /* normalize mgmt_class to vendor range 2 */ |
| 1511 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); |
| 1512 | vendor = port_priv->version[ |
| 1513 | agent_priv->reg_req->mgmt_class_version].vendor; |
| 1514 | |
| 1515 | if (!vendor) |
| 1516 | goto out; |
| 1517 | |
| 1518 | vendor_class = vendor->vendor_class[mgmt_class]; |
| 1519 | if (vendor_class) { |
| 1520 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); |
| 1521 | if (index < 0) |
| 1522 | goto out; |
| 1523 | method = vendor_class->method_table[index]; |
| 1524 | if (method) { |
| 1525 | /* Remove any methods for this mad agent */ |
| 1526 | remove_methods_mad_agent(method, agent_priv); |
| 1527 | /* |
| 1528 | * Now, check to see if there are |
| 1529 | * any methods still in use |
| 1530 | */ |
| 1531 | if (!check_method_table(method)) { |
| 1532 | /* If not, release management method table */ |
| 1533 | kfree(method); |
| 1534 | vendor_class->method_table[index] = NULL; |
| 1535 | memset(vendor_class->oui[index], 0, 3); |
| 1536 | /* Any OUIs left ? */ |
| 1537 | if (!check_vendor_class(vendor_class)) { |
| 1538 | /* If not, release vendor class table */ |
| 1539 | kfree(vendor_class); |
| 1540 | vendor->vendor_class[mgmt_class] = NULL; |
| 1541 | /* Any other vendor classes left ? */ |
| 1542 | if (!check_vendor_table(vendor)) { |
| 1543 | kfree(vendor); |
| 1544 | port_priv->version[ |
| 1545 | agent_priv->reg_req-> |
| 1546 | mgmt_class_version]. |
| 1547 | vendor = NULL; |
| 1548 | } |
| 1549 | } |
| 1550 | } |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | out: |
| 1555 | return; |
| 1556 | } |
| 1557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | static struct ib_mad_agent_private * |
| 1559 | find_mad_agent(struct ib_mad_port_private *port_priv, |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1560 | struct ib_mad *mad) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | { |
| 1562 | struct ib_mad_agent_private *mad_agent = NULL; |
| 1563 | unsigned long flags; |
| 1564 | |
| 1565 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 1566 | if (ib_response_mad(mad)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | u32 hi_tid; |
| 1568 | struct ib_mad_agent_private *entry; |
| 1569 | |
| 1570 | /* |
| 1571 | * Routing is based on high 32 bits of transaction ID |
| 1572 | * of MAD. |
| 1573 | */ |
| 1574 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1575 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | if (entry->agent.hi_tid == hi_tid) { |
| 1577 | mad_agent = entry; |
| 1578 | break; |
| 1579 | } |
| 1580 | } |
| 1581 | } else { |
| 1582 | struct ib_mad_mgmt_class_table *class; |
| 1583 | struct ib_mad_mgmt_method_table *method; |
| 1584 | struct ib_mad_mgmt_vendor_class_table *vendor; |
| 1585 | struct ib_mad_mgmt_vendor_class *vendor_class; |
| 1586 | struct ib_vendor_mad *vendor_mad; |
| 1587 | int index; |
| 1588 | |
| 1589 | /* |
| 1590 | * Routing is based on version, class, and method |
| 1591 | * For "newer" vendor MADs, also based on OUI |
| 1592 | */ |
| 1593 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) |
| 1594 | goto out; |
| 1595 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { |
| 1596 | class = port_priv->version[ |
| 1597 | mad->mad_hdr.class_version].class; |
| 1598 | if (!class) |
| 1599 | goto out; |
Hefty, Sean | b7ab0b1 | 2011-10-06 09:33:05 -0700 | [diff] [blame] | 1600 | if (convert_mgmt_class(mad->mad_hdr.mgmt_class) >= |
| 1601 | IB_MGMT_MAX_METHODS) |
| 1602 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | method = class->method_table[convert_mgmt_class( |
| 1604 | mad->mad_hdr.mgmt_class)]; |
| 1605 | if (method) |
| 1606 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1607 | ~IB_MGMT_METHOD_RESP]; |
| 1608 | } else { |
| 1609 | vendor = port_priv->version[ |
| 1610 | mad->mad_hdr.class_version].vendor; |
| 1611 | if (!vendor) |
| 1612 | goto out; |
| 1613 | vendor_class = vendor->vendor_class[vendor_class_index( |
| 1614 | mad->mad_hdr.mgmt_class)]; |
| 1615 | if (!vendor_class) |
| 1616 | goto out; |
| 1617 | /* Find matching OUI */ |
| 1618 | vendor_mad = (struct ib_vendor_mad *)mad; |
| 1619 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
| 1620 | if (index == -1) |
| 1621 | goto out; |
| 1622 | method = vendor_class->method_table[index]; |
| 1623 | if (method) { |
| 1624 | mad_agent = method->agent[mad->mad_hdr.method & |
| 1625 | ~IB_MGMT_METHOD_RESP]; |
| 1626 | } |
| 1627 | } |
| 1628 | } |
| 1629 | |
| 1630 | if (mad_agent) { |
| 1631 | if (mad_agent->agent.recv_handler) |
| 1632 | atomic_inc(&mad_agent->refcount); |
| 1633 | else { |
| 1634 | printk(KERN_NOTICE PFX "No receive handler for client " |
| 1635 | "%p on port %d\n", |
| 1636 | &mad_agent->agent, port_priv->port_num); |
| 1637 | mad_agent = NULL; |
| 1638 | } |
| 1639 | } |
| 1640 | out: |
| 1641 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| 1642 | |
| 1643 | return mad_agent; |
| 1644 | } |
| 1645 | |
| 1646 | static int validate_mad(struct ib_mad *mad, u32 qp_num) |
| 1647 | { |
| 1648 | int valid = 0; |
| 1649 | |
| 1650 | /* Make sure MAD base version is understood */ |
| 1651 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { |
| 1652 | printk(KERN_ERR PFX "MAD received with unsupported base " |
| 1653 | "version %d\n", mad->mad_hdr.base_version); |
| 1654 | goto out; |
| 1655 | } |
| 1656 | |
| 1657 | /* Filter SMI packets sent to other than QP0 */ |
| 1658 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| 1659 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
| 1660 | if (qp_num == 0) |
| 1661 | valid = 1; |
| 1662 | } else { |
| 1663 | /* Filter GSI packets sent to QP0 */ |
| 1664 | if (qp_num != 0) |
| 1665 | valid = 1; |
| 1666 | } |
| 1667 | |
| 1668 | out: |
| 1669 | return valid; |
| 1670 | } |
| 1671 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1672 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
| 1673 | struct ib_mad_hdr *mad_hdr) |
| 1674 | { |
| 1675 | struct ib_rmpp_mad *rmpp_mad; |
| 1676 | |
| 1677 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; |
| 1678 | return !mad_agent_priv->agent.rmpp_version || |
| 1679 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 1680 | IB_MGMT_RMPP_FLAG_ACTIVE) || |
| 1681 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); |
| 1682 | } |
| 1683 | |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1684 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
| 1685 | struct ib_mad_recv_wc *rwc) |
| 1686 | { |
| 1687 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == |
| 1688 | rwc->recv_buf.mad->mad_hdr.mgmt_class; |
| 1689 | } |
| 1690 | |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1691 | static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, |
| 1692 | struct ib_mad_send_wr_private *wr, |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1693 | struct ib_mad_recv_wc *rwc ) |
| 1694 | { |
| 1695 | struct ib_ah_attr attr; |
| 1696 | u8 send_resp, rcv_resp; |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1697 | union ib_gid sgid; |
| 1698 | struct ib_device *device = mad_agent_priv->agent.device; |
| 1699 | u8 port_num = mad_agent_priv->agent.port_num; |
| 1700 | u8 lmc; |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1701 | |
Michael Brooks | 7097228 | 2008-09-20 20:06:16 -0700 | [diff] [blame] | 1702 | send_resp = ib_response_mad((struct ib_mad *)wr->send_buf.mad); |
| 1703 | rcv_resp = ib_response_mad(rwc->recv_buf.mad); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1704 | |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1705 | if (send_resp == rcv_resp) |
| 1706 | /* both requests, or both responses. GIDs different */ |
| 1707 | return 0; |
| 1708 | |
| 1709 | if (ib_query_ah(wr->send_buf.ah, &attr)) |
| 1710 | /* Assume not equal, to avoid false positives. */ |
| 1711 | return 0; |
| 1712 | |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1713 | if (!!(attr.ah_flags & IB_AH_GRH) != |
| 1714 | !!(rwc->wc->wc_flags & IB_WC_GRH)) |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1715 | /* one has GID, other does not. Assume different */ |
| 1716 | return 0; |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1717 | |
| 1718 | if (!send_resp && rcv_resp) { |
| 1719 | /* is request/response. */ |
| 1720 | if (!(attr.ah_flags & IB_AH_GRH)) { |
| 1721 | if (ib_get_cached_lmc(device, port_num, &lmc)) |
| 1722 | return 0; |
| 1723 | return (!lmc || !((attr.src_path_bits ^ |
| 1724 | rwc->wc->dlid_path_bits) & |
| 1725 | ((1 << lmc) - 1))); |
| 1726 | } else { |
| 1727 | if (ib_get_cached_gid(device, port_num, |
| 1728 | attr.grh.sgid_index, &sgid)) |
| 1729 | return 0; |
| 1730 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, |
| 1731 | 16); |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | if (!(attr.ah_flags & IB_AH_GRH)) |
| 1736 | return attr.dlid == rwc->wc->slid; |
| 1737 | else |
| 1738 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, |
| 1739 | 16); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1740 | } |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1741 | |
| 1742 | static inline int is_direct(u8 class) |
| 1743 | { |
| 1744 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); |
| 1745 | } |
| 1746 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1747 | struct ib_mad_send_wr_private* |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1748 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1749 | struct ib_mad_recv_wc *wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | { |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1751 | struct ib_mad_send_wr_private *wr; |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1752 | struct ib_mad *mad; |
| 1753 | |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1754 | mad = (struct ib_mad *)wc->recv_buf.mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1756 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { |
| 1757 | if ((wr->tid == mad->mad_hdr.tid) && |
| 1758 | rcv_has_same_class(wr, wc) && |
| 1759 | /* |
| 1760 | * Don't check GID for direct routed MADs. |
| 1761 | * These might have permissive LIDs. |
| 1762 | */ |
| 1763 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || |
| 1764 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
Roland Dreier | 3979869 | 2006-11-13 09:38:07 -0800 | [diff] [blame] | 1765 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | } |
| 1767 | |
| 1768 | /* |
| 1769 | * It's possible to receive the response before we've |
| 1770 | * been notified that the send has completed |
| 1771 | */ |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1772 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
| 1773 | if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && |
| 1774 | wr->tid == mad->mad_hdr.tid && |
| 1775 | wr->timeout && |
| 1776 | rcv_has_same_class(wr, wc) && |
| 1777 | /* |
| 1778 | * Don't check GID for direct routed MADs. |
| 1779 | * These might have permissive LIDs. |
| 1780 | */ |
| 1781 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || |
| 1782 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | /* Verify request has not been canceled */ |
Jack Morgenstein | 9874e74 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 1784 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | } |
| 1786 | return NULL; |
| 1787 | } |
| 1788 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1789 | 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] | 1790 | { |
| 1791 | mad_send_wr->timeout = 0; |
Akinobu Mita | 179e091 | 2006-06-26 00:24:41 -0700 | [diff] [blame] | 1792 | if (mad_send_wr->refcount == 1) |
| 1793 | list_move_tail(&mad_send_wr->agent_list, |
Hal Rosenstock | 6a0c435 | 2005-07-27 11:45:26 -0700 | [diff] [blame] | 1794 | &mad_send_wr->mad_agent_priv->done_list); |
Hal Rosenstock | 6a0c435 | 2005-07-27 11:45:26 -0700 | [diff] [blame] | 1795 | } |
| 1796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | 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] | 1798 | struct ib_mad_recv_wc *mad_recv_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | { |
| 1800 | struct ib_mad_send_wr_private *mad_send_wr; |
| 1801 | struct ib_mad_send_wc mad_send_wc; |
| 1802 | unsigned long flags; |
| 1803 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1804 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
| 1805 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); |
| 1806 | if (mad_agent_priv->agent.rmpp_version) { |
| 1807 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
| 1808 | mad_recv_wc); |
| 1809 | if (!mad_recv_wc) { |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1810 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1811 | return; |
| 1812 | } |
| 1813 | } |
| 1814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | /* Complete corresponding request */ |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 1816 | if (ib_response_mad(mad_recv_wc->recv_buf.mad)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Jack Morgenstein | fa9656b | 2006-03-28 16:39:07 -0800 | [diff] [blame] | 1818 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | if (!mad_send_wr) { |
| 1820 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1821 | ib_free_recv_mad(mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1822 | deref_mad_agent(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | return; |
| 1824 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 1825 | ib_mark_mad_done(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 1827 | |
| 1828 | /* Defined behavior is to complete response before request */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1829 | 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] | 1830 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1831 | mad_recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | atomic_dec(&mad_agent_priv->refcount); |
| 1833 | |
| 1834 | mad_send_wc.status = IB_WC_SUCCESS; |
| 1835 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1836 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
| 1838 | } else { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1839 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| 1840 | mad_recv_wc); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 1841 | deref_mad_agent(mad_agent_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | } |
| 1843 | } |
| 1844 | |
Swapna Thete | 0b30704 | 2012-02-25 17:47:32 -0800 | [diff] [blame] | 1845 | static bool generate_unmatched_resp(struct ib_mad_private *recv, |
| 1846 | struct ib_mad_private *response) |
| 1847 | { |
| 1848 | if (recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_GET || |
| 1849 | recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_SET) { |
| 1850 | memcpy(response, recv, sizeof *response); |
| 1851 | response->header.recv_wc.wc = &response->header.wc; |
| 1852 | response->header.recv_wc.recv_buf.mad = &response->mad.mad; |
| 1853 | response->header.recv_wc.recv_buf.grh = &response->grh; |
| 1854 | response->mad.mad.mad_hdr.method = IB_MGMT_METHOD_GET_RESP; |
| 1855 | response->mad.mad.mad_hdr.status = |
| 1856 | cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); |
| 1857 | |
| 1858 | return true; |
| 1859 | } else { |
| 1860 | return false; |
| 1861 | } |
| 1862 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, |
| 1864 | struct ib_wc *wc) |
| 1865 | { |
| 1866 | struct ib_mad_qp_info *qp_info; |
| 1867 | struct ib_mad_private_header *mad_priv_hdr; |
Hal Rosenstock | 445d680 | 2007-08-03 10:45:17 -0700 | [diff] [blame] | 1868 | struct ib_mad_private *recv, *response = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | struct ib_mad_list_head *mad_list; |
| 1870 | struct ib_mad_agent_private *mad_agent; |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1871 | int port_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 1874 | qp_info = mad_list->mad_queue->qp_info; |
| 1875 | dequeue_mad(mad_list); |
| 1876 | |
| 1877 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
| 1878 | mad_list); |
| 1879 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 1880 | ib_dma_unmap_single(port_priv->device, |
| 1881 | recv->header.mapping, |
| 1882 | sizeof(struct ib_mad_private) - |
| 1883 | sizeof(struct ib_mad_private_header), |
| 1884 | DMA_FROM_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | |
| 1886 | /* Setup MAD receive work completion from "normal" work completion */ |
Sean Hefty | 24239af | 2005-04-16 15:26:08 -0700 | [diff] [blame] | 1887 | recv->header.wc = *wc; |
| 1888 | recv->header.recv_wc.wc = &recv->header.wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
| 1890 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; |
| 1891 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
| 1892 | |
| 1893 | if (atomic_read(&qp_info->snoop_count)) |
| 1894 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); |
| 1895 | |
| 1896 | /* Validate MAD */ |
| 1897 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) |
| 1898 | goto out; |
| 1899 | |
Hal Rosenstock | 445d680 | 2007-08-03 10:45:17 -0700 | [diff] [blame] | 1900 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 1901 | if (!response) { |
| 1902 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " |
| 1903 | "for response buffer\n"); |
| 1904 | goto out; |
| 1905 | } |
| 1906 | |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1907 | if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) |
| 1908 | port_num = wc->port_num; |
| 1909 | else |
| 1910 | port_num = port_priv->port_num; |
| 1911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | if (recv->mad.mad.mad_hdr.mgmt_class == |
| 1913 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1914 | enum smi_forward_action retsmi; |
| 1915 | |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 1916 | if (smi_handle_dr_smp_recv(&recv->mad.smp, |
| 1917 | port_priv->device->node_type, |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1918 | port_num, |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 1919 | port_priv->device->phys_port_cnt) == |
| 1920 | IB_SMI_DISCARD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | goto out; |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 1922 | |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1923 | retsmi = smi_check_forward_dr_smp(&recv->mad.smp); |
| 1924 | if (retsmi == IB_SMI_LOCAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | goto local; |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 1926 | |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1927 | if (retsmi == IB_SMI_SEND) { /* don't forward */ |
| 1928 | if (smi_handle_dr_smp_send(&recv->mad.smp, |
| 1929 | port_priv->device->node_type, |
| 1930 | port_num) == IB_SMI_DISCARD) |
| 1931 | goto out; |
Hal Rosenstock | de493d4 | 2007-04-02 11:24:07 -0400 | [diff] [blame] | 1932 | |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1933 | if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD) |
| 1934 | goto out; |
| 1935 | } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) { |
| 1936 | /* forward case for switches */ |
| 1937 | memcpy(response, recv, sizeof(*response)); |
| 1938 | response->header.recv_wc.wc = &response->header.wc; |
| 1939 | response->header.recv_wc.recv_buf.mad = &response->mad.mad; |
| 1940 | response->header.recv_wc.recv_buf.grh = &response->grh; |
| 1941 | |
Hal Rosenstock | 86dfbec | 2007-08-03 10:45:17 -0700 | [diff] [blame] | 1942 | agent_send_response(&response->mad.mad, |
| 1943 | &response->grh, wc, |
| 1944 | port_priv->device, |
| 1945 | smi_get_fwd_port(&recv->mad.smp), |
| 1946 | qp_info->qp->qp_num); |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | goto out; |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1949 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
| 1952 | local: |
| 1953 | /* Give driver "right of first refusal" on incoming MAD */ |
| 1954 | if (port_priv->device->process_mad) { |
| 1955 | int ret; |
| 1956 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | ret = port_priv->device->process_mad(port_priv->device, 0, |
| 1958 | port_priv->port_num, |
| 1959 | wc, &recv->grh, |
| 1960 | &recv->mad.mad, |
| 1961 | &response->mad.mad); |
| 1962 | if (ret & IB_MAD_RESULT_SUCCESS) { |
| 1963 | if (ret & IB_MAD_RESULT_CONSUMED) |
| 1964 | goto out; |
| 1965 | if (ret & IB_MAD_RESULT_REPLY) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1966 | agent_send_response(&response->mad.mad, |
| 1967 | &recv->grh, wc, |
| 1968 | port_priv->device, |
Hal Rosenstock | 1bae4db | 2007-05-14 17:21:52 -0400 | [diff] [blame] | 1969 | port_num, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 1970 | qp_info->qp->qp_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | goto out; |
| 1972 | } |
| 1973 | } |
| 1974 | } |
| 1975 | |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1976 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | if (mad_agent) { |
Hal Rosenstock | 4a0754f | 2005-07-27 11:45:24 -0700 | [diff] [blame] | 1978 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | /* |
| 1980 | * recv is freed up in error cases in ib_mad_complete_recv |
| 1981 | * or via recv_handler in ib_mad_complete_recv() |
| 1982 | */ |
| 1983 | recv = NULL; |
Swapna Thete | 0b30704 | 2012-02-25 17:47:32 -0800 | [diff] [blame] | 1984 | } else if (generate_unmatched_resp(recv, response)) { |
| 1985 | agent_send_response(&response->mad.mad, &recv->grh, wc, |
| 1986 | port_priv->device, port_num, qp_info->qp->qp_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | } |
| 1988 | |
| 1989 | out: |
| 1990 | /* Post another receive request for this QP */ |
| 1991 | if (response) { |
| 1992 | ib_mad_post_receive_mads(qp_info, response); |
| 1993 | if (recv) |
| 1994 | kmem_cache_free(ib_mad_cache, recv); |
| 1995 | } else |
| 1996 | ib_mad_post_receive_mads(qp_info, recv); |
| 1997 | } |
| 1998 | |
| 1999 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) |
| 2000 | { |
| 2001 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2002 | unsigned long delay; |
| 2003 | |
| 2004 | if (list_empty(&mad_agent_priv->wait_list)) { |
Roland Dreier | 6b2eef8 | 2009-09-07 08:27:50 -0700 | [diff] [blame] | 2005 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | } else { |
| 2007 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 2008 | struct ib_mad_send_wr_private, |
| 2009 | agent_list); |
| 2010 | |
| 2011 | if (time_after(mad_agent_priv->timeout, |
| 2012 | mad_send_wr->timeout)) { |
| 2013 | mad_agent_priv->timeout = mad_send_wr->timeout; |
Roland Dreier | 6b2eef8 | 2009-09-07 08:27:50 -0700 | [diff] [blame] | 2014 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | delay = mad_send_wr->timeout - jiffies; |
| 2016 | if ((long)delay <= 0) |
| 2017 | delay = 1; |
| 2018 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 2019 | port_priv->wq, |
| 2020 | &mad_agent_priv->timed_work, delay); |
| 2021 | } |
| 2022 | } |
| 2023 | } |
| 2024 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2025 | 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] | 2026 | { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2027 | struct ib_mad_agent_private *mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
| 2029 | struct list_head *list_item; |
| 2030 | unsigned long delay; |
| 2031 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2032 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | list_del(&mad_send_wr->agent_list); |
| 2034 | |
| 2035 | delay = mad_send_wr->timeout; |
| 2036 | mad_send_wr->timeout += jiffies; |
| 2037 | |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2038 | if (delay) { |
| 2039 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { |
| 2040 | temp_mad_send_wr = list_entry(list_item, |
| 2041 | struct ib_mad_send_wr_private, |
| 2042 | agent_list); |
| 2043 | if (time_after(mad_send_wr->timeout, |
| 2044 | temp_mad_send_wr->timeout)) |
| 2045 | break; |
| 2046 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | } |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2048 | else |
| 2049 | list_item = &mad_agent_priv->wait_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | list_add(&mad_send_wr->agent_list, list_item); |
| 2051 | |
| 2052 | /* Reschedule a work item if we have a shorter timeout */ |
| 2053 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { |
Roland Dreier | 6b2eef8 | 2009-09-07 08:27:50 -0700 | [diff] [blame] | 2054 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
| 2056 | &mad_agent_priv->timed_work, delay); |
| 2057 | } |
| 2058 | } |
| 2059 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2060 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
| 2061 | int timeout_ms) |
| 2062 | { |
| 2063 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 2064 | wait_for_response(mad_send_wr); |
| 2065 | } |
| 2066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | /* |
| 2068 | * Process a send work completion |
| 2069 | */ |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2070 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
| 2071 | struct ib_mad_send_wc *mad_send_wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | { |
| 2073 | struct ib_mad_agent_private *mad_agent_priv; |
| 2074 | unsigned long flags; |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2075 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2077 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2079 | if (mad_agent_priv->agent.rmpp_version) { |
| 2080 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
| 2081 | if (ret == IB_RMPP_RESULT_CONSUMED) |
| 2082 | goto done; |
| 2083 | } else |
| 2084 | ret = IB_RMPP_RESULT_UNHANDLED; |
| 2085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | if (mad_send_wc->status != IB_WC_SUCCESS && |
| 2087 | mad_send_wr->status == IB_WC_SUCCESS) { |
| 2088 | mad_send_wr->status = mad_send_wc->status; |
| 2089 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 2090 | } |
| 2091 | |
| 2092 | if (--mad_send_wr->refcount > 0) { |
| 2093 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && |
| 2094 | mad_send_wr->status == IB_WC_SUCCESS) { |
Hal Rosenstock | d760ce8 | 2005-07-27 11:45:25 -0700 | [diff] [blame] | 2095 | wait_for_response(mad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | } |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2097 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | } |
| 2099 | |
| 2100 | /* Remove send from MAD agent and notify client of completion */ |
| 2101 | list_del(&mad_send_wr->agent_list); |
| 2102 | adjust_timeout(mad_agent_priv); |
| 2103 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2104 | |
| 2105 | if (mad_send_wr->status != IB_WC_SUCCESS ) |
| 2106 | mad_send_wc->status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2107 | if (ret == IB_RMPP_RESULT_INTERNAL) |
| 2108 | ib_rmpp_send_handler(mad_send_wc); |
| 2109 | else |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2110 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2111 | mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | |
| 2113 | /* Release reference on agent taken when sending */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 2114 | deref_mad_agent(mad_agent_priv); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2115 | return; |
| 2116 | done: |
| 2117 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | } |
| 2119 | |
| 2120 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, |
| 2121 | struct ib_wc *wc) |
| 2122 | { |
| 2123 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
| 2124 | struct ib_mad_list_head *mad_list; |
| 2125 | struct ib_mad_qp_info *qp_info; |
| 2126 | struct ib_mad_queue *send_queue; |
| 2127 | struct ib_send_wr *bad_send_wr; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2128 | struct ib_mad_send_wc mad_send_wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | unsigned long flags; |
| 2130 | int ret; |
| 2131 | |
| 2132 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 2133 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 2134 | mad_list); |
| 2135 | send_queue = mad_list->mad_queue; |
| 2136 | qp_info = send_queue->qp_info; |
| 2137 | |
| 2138 | retry: |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 2139 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
| 2140 | mad_send_wr->header_mapping, |
| 2141 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
| 2142 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
| 2143 | mad_send_wr->payload_mapping, |
| 2144 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | queued_send_wr = NULL; |
| 2146 | spin_lock_irqsave(&send_queue->lock, flags); |
| 2147 | list_del(&mad_list->list); |
| 2148 | |
| 2149 | /* Move queued send to the send queue */ |
| 2150 | if (send_queue->count-- > send_queue->max_active) { |
| 2151 | mad_list = container_of(qp_info->overflow_list.next, |
| 2152 | struct ib_mad_list_head, list); |
| 2153 | queued_send_wr = container_of(mad_list, |
| 2154 | struct ib_mad_send_wr_private, |
| 2155 | mad_list); |
Akinobu Mita | 179e091 | 2006-06-26 00:24:41 -0700 | [diff] [blame] | 2156 | list_move_tail(&mad_list->list, &send_queue->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | } |
| 2158 | spin_unlock_irqrestore(&send_queue->lock, flags); |
| 2159 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2160 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 2161 | mad_send_wc.status = wc->status; |
| 2162 | mad_send_wc.vendor_err = wc->vendor_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | if (atomic_read(&qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2164 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2166 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | |
| 2168 | if (queued_send_wr) { |
| 2169 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2170 | &bad_send_wr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | if (ret) { |
| 2172 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); |
| 2173 | mad_send_wr = queued_send_wr; |
| 2174 | wc->status = IB_WC_LOC_QP_OP_ERR; |
| 2175 | goto retry; |
| 2176 | } |
| 2177 | } |
| 2178 | } |
| 2179 | |
| 2180 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) |
| 2181 | { |
| 2182 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2183 | struct ib_mad_list_head *mad_list; |
| 2184 | unsigned long flags; |
| 2185 | |
| 2186 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
| 2187 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { |
| 2188 | mad_send_wr = container_of(mad_list, |
| 2189 | struct ib_mad_send_wr_private, |
| 2190 | mad_list); |
| 2191 | mad_send_wr->retry = 1; |
| 2192 | } |
| 2193 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
| 2194 | } |
| 2195 | |
| 2196 | static void mad_error_handler(struct ib_mad_port_private *port_priv, |
| 2197 | struct ib_wc *wc) |
| 2198 | { |
| 2199 | struct ib_mad_list_head *mad_list; |
| 2200 | struct ib_mad_qp_info *qp_info; |
| 2201 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2202 | int ret; |
| 2203 | |
| 2204 | /* Determine if failure was a send or receive */ |
| 2205 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 2206 | qp_info = mad_list->mad_queue->qp_info; |
| 2207 | if (mad_list->mad_queue == &qp_info->recv_queue) |
| 2208 | /* |
| 2209 | * Receive errors indicate that the QP has entered the error |
| 2210 | * state - error handling/shutdown code will cleanup |
| 2211 | */ |
| 2212 | return; |
| 2213 | |
| 2214 | /* |
| 2215 | * Send errors will transition the QP to SQE - move |
| 2216 | * QP to RTS and repost flushed work requests |
| 2217 | */ |
| 2218 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
| 2219 | mad_list); |
| 2220 | if (wc->status == IB_WC_WR_FLUSH_ERR) { |
| 2221 | if (mad_send_wr->retry) { |
| 2222 | /* Repost send */ |
| 2223 | struct ib_send_wr *bad_send_wr; |
| 2224 | |
| 2225 | mad_send_wr->retry = 0; |
| 2226 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, |
| 2227 | &bad_send_wr); |
| 2228 | if (ret) |
| 2229 | ib_mad_send_done_handler(port_priv, wc); |
| 2230 | } else |
| 2231 | ib_mad_send_done_handler(port_priv, wc); |
| 2232 | } else { |
| 2233 | struct ib_qp_attr *attr; |
| 2234 | |
| 2235 | /* Transition QP to RTS and fail offending send */ |
| 2236 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2237 | if (attr) { |
| 2238 | attr->qp_state = IB_QPS_RTS; |
| 2239 | attr->cur_qp_state = IB_QPS_SQE; |
| 2240 | ret = ib_modify_qp(qp_info->qp, attr, |
| 2241 | IB_QP_STATE | IB_QP_CUR_STATE); |
| 2242 | kfree(attr); |
| 2243 | if (ret) |
| 2244 | printk(KERN_ERR PFX "mad_error_handler - " |
| 2245 | "ib_modify_qp to RTS : %d\n", ret); |
| 2246 | else |
| 2247 | mark_sends_for_retry(qp_info); |
| 2248 | } |
| 2249 | ib_mad_send_done_handler(port_priv, wc); |
| 2250 | } |
| 2251 | } |
| 2252 | |
| 2253 | /* |
| 2254 | * IB MAD completion callback |
| 2255 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2256 | static void ib_mad_completion_handler(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | { |
| 2258 | struct ib_mad_port_private *port_priv; |
| 2259 | struct ib_wc wc; |
| 2260 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2261 | port_priv = container_of(work, struct ib_mad_port_private, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2263 | |
| 2264 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { |
| 2265 | if (wc.status == IB_WC_SUCCESS) { |
| 2266 | switch (wc.opcode) { |
| 2267 | case IB_WC_SEND: |
| 2268 | ib_mad_send_done_handler(port_priv, &wc); |
| 2269 | break; |
| 2270 | case IB_WC_RECV: |
| 2271 | ib_mad_recv_done_handler(port_priv, &wc); |
| 2272 | break; |
| 2273 | default: |
| 2274 | BUG_ON(1); |
| 2275 | break; |
| 2276 | } |
| 2277 | } else |
| 2278 | mad_error_handler(port_priv, &wc); |
| 2279 | } |
| 2280 | } |
| 2281 | |
| 2282 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) |
| 2283 | { |
| 2284 | unsigned long flags; |
| 2285 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; |
| 2286 | struct ib_mad_send_wc mad_send_wc; |
| 2287 | struct list_head cancel_list; |
| 2288 | |
| 2289 | INIT_LIST_HEAD(&cancel_list); |
| 2290 | |
| 2291 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2292 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2293 | &mad_agent_priv->send_list, agent_list) { |
| 2294 | if (mad_send_wr->status == IB_WC_SUCCESS) { |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 2295 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
| 2297 | } |
| 2298 | } |
| 2299 | |
| 2300 | /* Empty wait list to prevent receives from finding a request */ |
| 2301 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); |
| 2302 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2303 | |
| 2304 | /* Report all cancelled requests */ |
| 2305 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; |
| 2306 | mad_send_wc.vendor_err = 0; |
| 2307 | |
| 2308 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
| 2309 | &cancel_list, agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2310 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
| 2311 | list_del(&mad_send_wr->agent_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2313 | &mad_send_wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | atomic_dec(&mad_agent_priv->refcount); |
| 2315 | } |
| 2316 | } |
| 2317 | |
| 2318 | static struct ib_mad_send_wr_private* |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2319 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
| 2320 | struct ib_mad_send_buf *send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | { |
| 2322 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2323 | |
| 2324 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
| 2325 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2326 | if (&mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | return mad_send_wr; |
| 2328 | } |
| 2329 | |
| 2330 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
| 2331 | agent_list) { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2332 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
| 2333 | &mad_send_wr->send_buf == send_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | return mad_send_wr; |
| 2335 | } |
| 2336 | return NULL; |
| 2337 | } |
| 2338 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2339 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
| 2340 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | { |
| 2342 | struct ib_mad_agent_private *mad_agent_priv; |
| 2343 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2344 | unsigned long flags; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2345 | int active; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
| 2347 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
| 2348 | agent); |
| 2349 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2350 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2351 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2353 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | } |
| 2355 | |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2356 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2357 | if (!timeout_ms) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2359 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | } |
| 2361 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2362 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
Hal Rosenstock | cabe3cb | 2005-07-27 11:45:33 -0700 | [diff] [blame] | 2363 | if (active) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2364 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
| 2365 | else |
| 2366 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2368 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2369 | return 0; |
| 2370 | } |
| 2371 | EXPORT_SYMBOL(ib_modify_mad); |
| 2372 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2373 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
| 2374 | struct ib_mad_send_buf *send_buf) |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2375 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2376 | ib_modify_mad(mad_agent, send_buf, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | } |
| 2378 | EXPORT_SYMBOL(ib_cancel_mad); |
| 2379 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2380 | static void local_completions(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | { |
| 2382 | struct ib_mad_agent_private *mad_agent_priv; |
| 2383 | struct ib_mad_local_private *local; |
| 2384 | struct ib_mad_agent_private *recv_mad_agent; |
| 2385 | unsigned long flags; |
Ralph Campbell | 1d9bc6d6 | 2009-02-27 10:34:30 -0800 | [diff] [blame] | 2386 | int free_mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | struct ib_wc wc; |
| 2388 | struct ib_mad_send_wc mad_send_wc; |
| 2389 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2390 | mad_agent_priv = |
| 2391 | container_of(work, struct ib_mad_agent_private, local_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | |
| 2393 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2394 | while (!list_empty(&mad_agent_priv->local_list)) { |
| 2395 | local = list_entry(mad_agent_priv->local_list.next, |
| 2396 | struct ib_mad_local_private, |
| 2397 | completion_list); |
Michael S. Tsirkin | 37289ef | 2006-03-30 15:52:54 +0200 | [diff] [blame] | 2398 | list_del(&local->completion_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
Ralph Campbell | 1d9bc6d6 | 2009-02-27 10:34:30 -0800 | [diff] [blame] | 2400 | free_mad = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | if (local->mad_priv) { |
| 2402 | recv_mad_agent = local->recv_mad_agent; |
| 2403 | if (!recv_mad_agent) { |
| 2404 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); |
Ralph Campbell | 1d9bc6d6 | 2009-02-27 10:34:30 -0800 | [diff] [blame] | 2405 | free_mad = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | goto local_send_completion; |
| 2407 | } |
| 2408 | |
| 2409 | /* |
| 2410 | * Defined behavior is to complete response |
| 2411 | * before request |
| 2412 | */ |
Michael S. Tsirkin | 062dbb6 | 2006-12-31 21:09:42 +0200 | [diff] [blame] | 2413 | build_smp_wc(recv_mad_agent->agent.qp, |
| 2414 | (unsigned long) local->mad_send_wr, |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 2415 | be16_to_cpu(IB_LID_PERMISSIVE), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2416 | 0, recv_mad_agent->agent.port_num, &wc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | |
| 2418 | local->mad_priv->header.recv_wc.wc = &wc; |
| 2419 | local->mad_priv->header.recv_wc.mad_len = |
| 2420 | sizeof(struct ib_mad); |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2421 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
| 2422 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, |
| 2423 | &local->mad_priv->header.recv_wc.rmpp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
| 2425 | local->mad_priv->header.recv_wc.recv_buf.mad = |
| 2426 | &local->mad_priv->mad.mad; |
| 2427 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
| 2428 | snoop_recv(recv_mad_agent->qp_info, |
| 2429 | &local->mad_priv->header.recv_wc, |
| 2430 | IB_MAD_SNOOP_RECVS); |
| 2431 | recv_mad_agent->agent.recv_handler( |
| 2432 | &recv_mad_agent->agent, |
| 2433 | &local->mad_priv->header.recv_wc); |
| 2434 | spin_lock_irqsave(&recv_mad_agent->lock, flags); |
| 2435 | atomic_dec(&recv_mad_agent->refcount); |
| 2436 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); |
| 2437 | } |
| 2438 | |
| 2439 | local_send_completion: |
| 2440 | /* Complete send */ |
| 2441 | mad_send_wc.status = IB_WC_SUCCESS; |
| 2442 | mad_send_wc.vendor_err = 0; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2443 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2445 | snoop_send(mad_agent_priv->qp_info, |
| 2446 | &local->mad_send_wr->send_buf, |
| 2447 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2449 | &mad_send_wc); |
| 2450 | |
| 2451 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | atomic_dec(&mad_agent_priv->refcount); |
Ralph Campbell | 1d9bc6d6 | 2009-02-27 10:34:30 -0800 | [diff] [blame] | 2453 | if (free_mad) |
Hal Rosenstock | 2c153b9 | 2005-07-27 11:45:31 -0700 | [diff] [blame] | 2454 | kmem_cache_free(ib_mad_cache, local->mad_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | kfree(local); |
| 2456 | } |
| 2457 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2458 | } |
| 2459 | |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2460 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
| 2461 | { |
| 2462 | int ret; |
| 2463 | |
Sean Hefty | 4fc8cd4 | 2007-11-27 00:11:04 -0800 | [diff] [blame] | 2464 | if (!mad_send_wr->retries_left) |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2465 | return -ETIMEDOUT; |
| 2466 | |
Sean Hefty | 4fc8cd4 | 2007-11-27 00:11:04 -0800 | [diff] [blame] | 2467 | mad_send_wr->retries_left--; |
| 2468 | mad_send_wr->send_buf.retries++; |
| 2469 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2470 | 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] | 2471 | |
Hal Rosenstock | fa619a7 | 2005-07-27 11:45:37 -0700 | [diff] [blame] | 2472 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
| 2473 | ret = ib_retry_rmpp(mad_send_wr); |
| 2474 | switch (ret) { |
| 2475 | case IB_RMPP_RESULT_UNHANDLED: |
| 2476 | ret = ib_send_mad(mad_send_wr); |
| 2477 | break; |
| 2478 | case IB_RMPP_RESULT_CONSUMED: |
| 2479 | ret = 0; |
| 2480 | break; |
| 2481 | default: |
| 2482 | ret = -ECOMM; |
| 2483 | break; |
| 2484 | } |
| 2485 | } else |
| 2486 | ret = ib_send_mad(mad_send_wr); |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2487 | |
| 2488 | if (!ret) { |
| 2489 | mad_send_wr->refcount++; |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2490 | list_add_tail(&mad_send_wr->agent_list, |
| 2491 | &mad_send_wr->mad_agent_priv->send_list); |
| 2492 | } |
| 2493 | return ret; |
| 2494 | } |
| 2495 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2496 | static void timeout_sends(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | { |
| 2498 | struct ib_mad_agent_private *mad_agent_priv; |
| 2499 | struct ib_mad_send_wr_private *mad_send_wr; |
| 2500 | struct ib_mad_send_wc mad_send_wc; |
| 2501 | unsigned long flags, delay; |
| 2502 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2503 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
| 2504 | timed_work.work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | mad_send_wc.vendor_err = 0; |
| 2506 | |
| 2507 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2508 | while (!list_empty(&mad_agent_priv->wait_list)) { |
| 2509 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
| 2510 | struct ib_mad_send_wr_private, |
| 2511 | agent_list); |
| 2512 | |
| 2513 | if (time_after(mad_send_wr->timeout, jiffies)) { |
| 2514 | delay = mad_send_wr->timeout - jiffies; |
| 2515 | if ((long)delay <= 0) |
| 2516 | delay = 1; |
| 2517 | queue_delayed_work(mad_agent_priv->qp_info-> |
| 2518 | port_priv->wq, |
| 2519 | &mad_agent_priv->timed_work, delay); |
| 2520 | break; |
| 2521 | } |
| 2522 | |
Hal Rosenstock | dbf9227 | 2005-07-27 11:45:30 -0700 | [diff] [blame] | 2523 | list_del(&mad_send_wr->agent_list); |
Hal Rosenstock | 29bb33d | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2524 | if (mad_send_wr->status == IB_WC_SUCCESS && |
| 2525 | !retry_send(mad_send_wr)) |
Hal Rosenstock | f75b7a5 | 2005-07-27 11:45:29 -0700 | [diff] [blame] | 2526 | continue; |
| 2527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2528 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2529 | |
Hal Rosenstock | 03b61ad | 2005-07-27 11:45:32 -0700 | [diff] [blame] | 2530 | if (mad_send_wr->status == IB_WC_SUCCESS) |
| 2531 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; |
| 2532 | else |
| 2533 | mad_send_wc.status = mad_send_wr->status; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 2534 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| 2536 | &mad_send_wc); |
| 2537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | atomic_dec(&mad_agent_priv->refcount); |
| 2539 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| 2540 | } |
| 2541 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| 2542 | } |
| 2543 | |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2544 | 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] | 2545 | { |
| 2546 | struct ib_mad_port_private *port_priv = cq->cq_context; |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2547 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2549 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2550 | if (!list_empty(&port_priv->port_list)) |
| 2551 | queue_work(port_priv->wq, &port_priv->work); |
| 2552 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | } |
| 2554 | |
| 2555 | /* |
| 2556 | * Allocate receive MADs and post receive WRs for them |
| 2557 | */ |
| 2558 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| 2559 | struct ib_mad_private *mad) |
| 2560 | { |
| 2561 | unsigned long flags; |
| 2562 | int post, ret; |
| 2563 | struct ib_mad_private *mad_priv; |
| 2564 | struct ib_sge sg_list; |
| 2565 | struct ib_recv_wr recv_wr, *bad_recv_wr; |
| 2566 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; |
| 2567 | |
| 2568 | /* Initialize common scatter list fields */ |
| 2569 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; |
| 2570 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; |
| 2571 | |
| 2572 | /* Initialize common receive WR fields */ |
| 2573 | recv_wr.next = NULL; |
| 2574 | recv_wr.sg_list = &sg_list; |
| 2575 | recv_wr.num_sge = 1; |
| 2576 | |
| 2577 | do { |
| 2578 | /* Allocate and map receive buffer */ |
| 2579 | if (mad) { |
| 2580 | mad_priv = mad; |
| 2581 | mad = NULL; |
| 2582 | } else { |
| 2583 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
| 2584 | if (!mad_priv) { |
| 2585 | printk(KERN_ERR PFX "No memory for receive buffer\n"); |
| 2586 | ret = -ENOMEM; |
| 2587 | break; |
| 2588 | } |
| 2589 | } |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 2590 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
| 2591 | &mad_priv->grh, |
| 2592 | sizeof *mad_priv - |
| 2593 | sizeof mad_priv->header, |
| 2594 | DMA_FROM_DEVICE); |
| 2595 | mad_priv->header.mapping = sg_list.addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
| 2597 | mad_priv->header.mad_list.mad_queue = recv_queue; |
| 2598 | |
| 2599 | /* Post receive WR */ |
| 2600 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2601 | post = (++recv_queue->count < recv_queue->max_active); |
| 2602 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); |
| 2603 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
| 2604 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); |
| 2605 | if (ret) { |
| 2606 | spin_lock_irqsave(&recv_queue->lock, flags); |
| 2607 | list_del(&mad_priv->header.mad_list.list); |
| 2608 | recv_queue->count--; |
| 2609 | spin_unlock_irqrestore(&recv_queue->lock, flags); |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 2610 | ib_dma_unmap_single(qp_info->port_priv->device, |
| 2611 | mad_priv->header.mapping, |
| 2612 | sizeof *mad_priv - |
| 2613 | sizeof mad_priv->header, |
| 2614 | DMA_FROM_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | kmem_cache_free(ib_mad_cache, mad_priv); |
| 2616 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); |
| 2617 | break; |
| 2618 | } |
| 2619 | } while (post); |
| 2620 | |
| 2621 | return ret; |
| 2622 | } |
| 2623 | |
| 2624 | /* |
| 2625 | * Return all the posted receive MADs |
| 2626 | */ |
| 2627 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) |
| 2628 | { |
| 2629 | struct ib_mad_private_header *mad_priv_hdr; |
| 2630 | struct ib_mad_private *recv; |
| 2631 | struct ib_mad_list_head *mad_list; |
| 2632 | |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2633 | if (!qp_info->qp) |
| 2634 | return; |
| 2635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | while (!list_empty(&qp_info->recv_queue.list)) { |
| 2637 | |
| 2638 | mad_list = list_entry(qp_info->recv_queue.list.next, |
| 2639 | struct ib_mad_list_head, list); |
| 2640 | mad_priv_hdr = container_of(mad_list, |
| 2641 | struct ib_mad_private_header, |
| 2642 | mad_list); |
| 2643 | recv = container_of(mad_priv_hdr, struct ib_mad_private, |
| 2644 | header); |
| 2645 | |
| 2646 | /* Remove from posted receive MAD list */ |
| 2647 | list_del(&mad_list->list); |
| 2648 | |
Ralph Campbell | 1527106 | 2006-12-12 14:28:30 -0800 | [diff] [blame] | 2649 | ib_dma_unmap_single(qp_info->port_priv->device, |
| 2650 | recv->header.mapping, |
| 2651 | sizeof(struct ib_mad_private) - |
| 2652 | sizeof(struct ib_mad_private_header), |
| 2653 | DMA_FROM_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | kmem_cache_free(ib_mad_cache, recv); |
| 2655 | } |
| 2656 | |
| 2657 | qp_info->recv_queue.count = 0; |
| 2658 | } |
| 2659 | |
| 2660 | /* |
| 2661 | * Start the port |
| 2662 | */ |
| 2663 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) |
| 2664 | { |
| 2665 | int ret, i; |
| 2666 | struct ib_qp_attr *attr; |
| 2667 | struct ib_qp *qp; |
| 2668 | |
| 2669 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 2670 | if (!attr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
| 2672 | return -ENOMEM; |
| 2673 | } |
| 2674 | |
| 2675 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
| 2676 | qp = port_priv->qp_info[i].qp; |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2677 | if (!qp) |
| 2678 | continue; |
| 2679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2680 | /* |
| 2681 | * PKey index for QP1 is irrelevant but |
| 2682 | * one is needed for the Reset to Init transition |
| 2683 | */ |
| 2684 | attr->qp_state = IB_QPS_INIT; |
| 2685 | attr->pkey_index = 0; |
| 2686 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
| 2687 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | |
| 2688 | IB_QP_PKEY_INDEX | IB_QP_QKEY); |
| 2689 | if (ret) { |
| 2690 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2691 | "INIT: %d\n", i, ret); |
| 2692 | goto out; |
| 2693 | } |
| 2694 | |
| 2695 | attr->qp_state = IB_QPS_RTR; |
| 2696 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); |
| 2697 | if (ret) { |
| 2698 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2699 | "RTR: %d\n", i, ret); |
| 2700 | goto out; |
| 2701 | } |
| 2702 | |
| 2703 | attr->qp_state = IB_QPS_RTS; |
| 2704 | attr->sq_psn = IB_MAD_SEND_Q_PSN; |
| 2705 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); |
| 2706 | if (ret) { |
| 2707 | printk(KERN_ERR PFX "Couldn't change QP%d state to " |
| 2708 | "RTS: %d\n", i, ret); |
| 2709 | goto out; |
| 2710 | } |
| 2711 | } |
| 2712 | |
| 2713 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| 2714 | if (ret) { |
| 2715 | printk(KERN_ERR PFX "Failed to request completion " |
| 2716 | "notification: %d\n", ret); |
| 2717 | goto out; |
| 2718 | } |
| 2719 | |
| 2720 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2721 | if (!port_priv->qp_info[i].qp) |
| 2722 | continue; |
| 2723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2724 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
| 2725 | if (ret) { |
| 2726 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); |
| 2727 | goto out; |
| 2728 | } |
| 2729 | } |
| 2730 | out: |
| 2731 | kfree(attr); |
| 2732 | return ret; |
| 2733 | } |
| 2734 | |
| 2735 | static void qp_event_handler(struct ib_event *event, void *qp_context) |
| 2736 | { |
| 2737 | struct ib_mad_qp_info *qp_info = qp_context; |
| 2738 | |
| 2739 | /* It's worse than that! He's dead, Jim! */ |
| 2740 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", |
| 2741 | event->event, qp_info->qp->qp_num); |
| 2742 | } |
| 2743 | |
| 2744 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, |
| 2745 | struct ib_mad_queue *mad_queue) |
| 2746 | { |
| 2747 | mad_queue->qp_info = qp_info; |
| 2748 | mad_queue->count = 0; |
| 2749 | spin_lock_init(&mad_queue->lock); |
| 2750 | INIT_LIST_HEAD(&mad_queue->list); |
| 2751 | } |
| 2752 | |
| 2753 | static void init_mad_qp(struct ib_mad_port_private *port_priv, |
| 2754 | struct ib_mad_qp_info *qp_info) |
| 2755 | { |
| 2756 | qp_info->port_priv = port_priv; |
| 2757 | init_mad_queue(qp_info, &qp_info->send_queue); |
| 2758 | init_mad_queue(qp_info, &qp_info->recv_queue); |
| 2759 | INIT_LIST_HEAD(&qp_info->overflow_list); |
| 2760 | spin_lock_init(&qp_info->snoop_lock); |
| 2761 | qp_info->snoop_table = NULL; |
| 2762 | qp_info->snoop_table_size = 0; |
| 2763 | atomic_set(&qp_info->snoop_count, 0); |
| 2764 | } |
| 2765 | |
| 2766 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, |
| 2767 | enum ib_qp_type qp_type) |
| 2768 | { |
| 2769 | struct ib_qp_init_attr qp_init_attr; |
| 2770 | int ret; |
| 2771 | |
| 2772 | memset(&qp_init_attr, 0, sizeof qp_init_attr); |
| 2773 | qp_init_attr.send_cq = qp_info->port_priv->cq; |
| 2774 | qp_init_attr.recv_cq = qp_info->port_priv->cq; |
| 2775 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; |
Hal Rosenstock | b76aabc | 2009-09-07 08:28:48 -0700 | [diff] [blame] | 2776 | qp_init_attr.cap.max_send_wr = mad_sendq_size; |
| 2777 | qp_init_attr.cap.max_recv_wr = mad_recvq_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
| 2779 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; |
| 2780 | qp_init_attr.qp_type = qp_type; |
| 2781 | qp_init_attr.port_num = qp_info->port_priv->port_num; |
| 2782 | qp_init_attr.qp_context = qp_info; |
| 2783 | qp_init_attr.event_handler = qp_event_handler; |
| 2784 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); |
| 2785 | if (IS_ERR(qp_info->qp)) { |
| 2786 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", |
| 2787 | get_spl_qp_index(qp_type)); |
| 2788 | ret = PTR_ERR(qp_info->qp); |
| 2789 | goto error; |
| 2790 | } |
| 2791 | /* Use minimum queue sizes unless the CQ is resized */ |
Hal Rosenstock | b76aabc | 2009-09-07 08:28:48 -0700 | [diff] [blame] | 2792 | qp_info->send_queue.max_active = mad_sendq_size; |
| 2793 | qp_info->recv_queue.max_active = mad_recvq_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | return 0; |
| 2795 | |
| 2796 | error: |
| 2797 | return ret; |
| 2798 | } |
| 2799 | |
| 2800 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) |
| 2801 | { |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2802 | if (!qp_info->qp) |
| 2803 | return; |
| 2804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | ib_destroy_qp(qp_info->qp); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 2806 | kfree(qp_info->snoop_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | } |
| 2808 | |
| 2809 | /* |
| 2810 | * Open the port |
| 2811 | * Create the QP, PD, MR, and CQ if needed |
| 2812 | */ |
| 2813 | static int ib_mad_port_open(struct ib_device *device, |
| 2814 | int port_num) |
| 2815 | { |
| 2816 | int ret, cq_size; |
| 2817 | struct ib_mad_port_private *port_priv; |
| 2818 | unsigned long flags; |
| 2819 | char name[sizeof "ib_mad123"]; |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2820 | int has_smi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | /* Create new device info */ |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2823 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | if (!port_priv) { |
| 2825 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); |
| 2826 | return -ENOMEM; |
| 2827 | } |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 2828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | port_priv->device = device; |
| 2830 | port_priv->port_num = port_num; |
| 2831 | spin_lock_init(&port_priv->reg_lock); |
| 2832 | INIT_LIST_HEAD(&port_priv->agent_list); |
| 2833 | init_mad_qp(port_priv, &port_priv->qp_info[0]); |
| 2834 | init_mad_qp(port_priv, &port_priv->qp_info[1]); |
| 2835 | |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2836 | cq_size = mad_sendq_size + mad_recvq_size; |
| 2837 | has_smi = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_INFINIBAND; |
| 2838 | if (has_smi) |
| 2839 | cq_size *= 2; |
| 2840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | port_priv->cq = ib_create_cq(port_priv->device, |
Hal Rosenstock | 5dd2ce1 | 2005-08-15 14:16:36 -0700 | [diff] [blame] | 2842 | ib_mad_thread_completion_handler, |
Michael S. Tsirkin | f4fd0b2 | 2007-05-03 13:48:47 +0300 | [diff] [blame] | 2843 | NULL, port_priv, cq_size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | if (IS_ERR(port_priv->cq)) { |
| 2845 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); |
| 2846 | ret = PTR_ERR(port_priv->cq); |
| 2847 | goto error3; |
| 2848 | } |
| 2849 | |
| 2850 | port_priv->pd = ib_alloc_pd(device); |
| 2851 | if (IS_ERR(port_priv->pd)) { |
| 2852 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); |
| 2853 | ret = PTR_ERR(port_priv->pd); |
| 2854 | goto error4; |
| 2855 | } |
| 2856 | |
| 2857 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); |
| 2858 | if (IS_ERR(port_priv->mr)) { |
| 2859 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); |
| 2860 | ret = PTR_ERR(port_priv->mr); |
| 2861 | goto error5; |
| 2862 | } |
| 2863 | |
Eli Cohen | fac70d5 | 2010-09-27 17:51:11 -0700 | [diff] [blame] | 2864 | if (has_smi) { |
| 2865 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); |
| 2866 | if (ret) |
| 2867 | goto error6; |
| 2868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
| 2870 | if (ret) |
| 2871 | goto error7; |
| 2872 | |
| 2873 | snprintf(name, sizeof name, "ib_mad%d", port_num); |
| 2874 | port_priv->wq = create_singlethread_workqueue(name); |
| 2875 | if (!port_priv->wq) { |
| 2876 | ret = -ENOMEM; |
| 2877 | goto error8; |
| 2878 | } |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2879 | INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2881 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2882 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); |
| 2883 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | ret = ib_mad_port_start(port_priv); |
| 2886 | if (ret) { |
| 2887 | printk(KERN_ERR PFX "Couldn't start port\n"); |
| 2888 | goto error9; |
| 2889 | } |
| 2890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | return 0; |
| 2892 | |
| 2893 | error9: |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2894 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2895 | list_del_init(&port_priv->port_list); |
| 2896 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | destroy_workqueue(port_priv->wq); |
| 2899 | error8: |
| 2900 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2901 | error7: |
| 2902 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2903 | error6: |
| 2904 | ib_dereg_mr(port_priv->mr); |
| 2905 | error5: |
| 2906 | ib_dealloc_pd(port_priv->pd); |
| 2907 | error4: |
| 2908 | ib_destroy_cq(port_priv->cq); |
| 2909 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2910 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2911 | error3: |
| 2912 | kfree(port_priv); |
| 2913 | |
| 2914 | return ret; |
| 2915 | } |
| 2916 | |
| 2917 | /* |
| 2918 | * Close the port |
| 2919 | * If there are no classes using the port, free the port |
| 2920 | * resources (CQ, MR, PD, QP) and remove the port's info structure |
| 2921 | */ |
| 2922 | static int ib_mad_port_close(struct ib_device *device, int port_num) |
| 2923 | { |
| 2924 | struct ib_mad_port_private *port_priv; |
| 2925 | unsigned long flags; |
| 2926 | |
| 2927 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| 2928 | port_priv = __ib_get_mad_port(device, port_num); |
| 2929 | if (port_priv == NULL) { |
| 2930 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2931 | printk(KERN_ERR PFX "Port %d not found\n", port_num); |
| 2932 | return -ENODEV; |
| 2933 | } |
Michael S. Tsirkin | dc05980 | 2006-03-20 10:08:25 -0800 | [diff] [blame] | 2934 | list_del_init(&port_priv->port_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| 2936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2937 | destroy_workqueue(port_priv->wq); |
| 2938 | destroy_mad_qp(&port_priv->qp_info[1]); |
| 2939 | destroy_mad_qp(&port_priv->qp_info[0]); |
| 2940 | ib_dereg_mr(port_priv->mr); |
| 2941 | ib_dealloc_pd(port_priv->pd); |
| 2942 | ib_destroy_cq(port_priv->cq); |
| 2943 | cleanup_recv_queue(&port_priv->qp_info[1]); |
| 2944 | cleanup_recv_queue(&port_priv->qp_info[0]); |
| 2945 | /* XXX: Handle deallocation of MAD registration tables */ |
| 2946 | |
| 2947 | kfree(port_priv); |
| 2948 | |
| 2949 | return 0; |
| 2950 | } |
| 2951 | |
| 2952 | static void ib_mad_init_device(struct ib_device *device) |
| 2953 | { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2954 | int start, end, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2956 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 2957 | return; |
| 2958 | |
| 2959 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2960 | start = 0; |
| 2961 | end = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | } else { |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2963 | start = 1; |
| 2964 | end = device->phys_port_cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2966 | |
| 2967 | for (i = start; i <= end; i++) { |
| 2968 | if (ib_mad_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2970 | device->name, i); |
| 2971 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | } |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2973 | if (ib_agent_port_open(device, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
| 2975 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2976 | device->name, i); |
| 2977 | goto error_agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | } |
| 2979 | } |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 2980 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2982 | error_agent: |
| 2983 | if (ib_mad_port_close(device, i)) |
| 2984 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 2985 | device->name, i); |
| 2986 | |
| 2987 | error: |
| 2988 | i--; |
| 2989 | |
| 2990 | while (i >= start) { |
| 2991 | if (ib_agent_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2992 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 2993 | "for agents\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2994 | device->name, i); |
| 2995 | if (ib_mad_port_close(device, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2996 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
Roland Dreier | 4ab6fb7 | 2005-10-06 13:28:16 -0700 | [diff] [blame] | 2997 | device->name, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | i--; |
| 2999 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | } |
| 3001 | |
| 3002 | static void ib_mad_remove_device(struct ib_device *device) |
| 3003 | { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 3004 | int i, num_ports, cur_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3005 | |
Steve Wise | 070e140 | 2010-03-04 18:18:18 +0000 | [diff] [blame] | 3006 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 3007 | return; |
| 3008 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 3009 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3010 | num_ports = 1; |
| 3011 | cur_port = 0; |
| 3012 | } else { |
| 3013 | num_ports = device->phys_port_cnt; |
| 3014 | cur_port = 1; |
| 3015 | } |
| 3016 | for (i = 0; i < num_ports; i++, cur_port++) { |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 3017 | if (ib_agent_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
| 3019 | "for agents\n", |
| 3020 | device->name, cur_port); |
Hal Rosenstock | f68bcc2 | 2005-07-27 11:45:27 -0700 | [diff] [blame] | 3021 | if (ib_mad_port_close(device, cur_port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
| 3023 | device->name, cur_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3024 | } |
| 3025 | } |
| 3026 | |
| 3027 | static struct ib_client mad_client = { |
| 3028 | .name = "mad", |
| 3029 | .add = ib_mad_init_device, |
| 3030 | .remove = ib_mad_remove_device |
| 3031 | }; |
| 3032 | |
| 3033 | static int __init ib_mad_init_module(void) |
| 3034 | { |
| 3035 | int ret; |
| 3036 | |
Hal Rosenstock | b76aabc | 2009-09-07 08:28:48 -0700 | [diff] [blame] | 3037 | mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
| 3038 | mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); |
| 3039 | |
| 3040 | mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); |
| 3041 | mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); |
| 3042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3043 | ib_mad_cache = kmem_cache_create("ib_mad", |
| 3044 | sizeof(struct ib_mad_private), |
| 3045 | 0, |
| 3046 | SLAB_HWCACHE_ALIGN, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | NULL); |
| 3048 | if (!ib_mad_cache) { |
| 3049 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); |
| 3050 | ret = -ENOMEM; |
| 3051 | goto error1; |
| 3052 | } |
| 3053 | |
| 3054 | INIT_LIST_HEAD(&ib_mad_port_list); |
| 3055 | |
| 3056 | if (ib_register_client(&mad_client)) { |
| 3057 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); |
| 3058 | ret = -EINVAL; |
| 3059 | goto error2; |
| 3060 | } |
| 3061 | |
| 3062 | return 0; |
| 3063 | |
| 3064 | error2: |
| 3065 | kmem_cache_destroy(ib_mad_cache); |
| 3066 | error1: |
| 3067 | return ret; |
| 3068 | } |
| 3069 | |
| 3070 | static void __exit ib_mad_cleanup_module(void) |
| 3071 | { |
| 3072 | ib_unregister_client(&mad_client); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 3073 | kmem_cache_destroy(ib_mad_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3074 | } |
| 3075 | |
| 3076 | module_init(ib_mad_init_module); |
| 3077 | module_exit(ib_mad_cleanup_module); |