include/rdma/ib_mad.h

   1 /*
   2  * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
   3  * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
   4  * Copyright (c) 2004 Intel Corporation.  All rights reserved.
   5  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   6  * Copyright (c) 2004-2006 Voltaire Corporation.  All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two
   9  * licenses.  You may choose to be licensed under the terms of the GNU
  10  * General Public License (GPL) Version 2, available from the file
  11  * COPYING in the main directory of this source tree, or the
  12  * OpenIB.org BSD license below:
  13  *
  14  *     Redistribution and use in source and binary forms, with or
  15  *     without modification, are permitted provided that the following
  16  *     conditions are met:
  17  *
  18  *      - Redistributions of source code must retain the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer.
  21  *
  22  *      - Redistributions in binary form must reproduce the above
  23  *        copyright notice, this list of conditions and the following
  24  *        disclaimer in the documentation and/or other materials
  25  *        provided with the distribution.
  26  *
  27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34  * SOFTWARE.
  35  *
  36  * $Id: ib_mad.h 5596 2006-03-03 01:00:07Z sean.hefty $
  37  */
  38
  39 #if !defined( IB_MAD_H )
  40 #define IB_MAD_H
  41
  42 #include <linux/list.h>
  43
  44 #include <rdma/ib_verbs.h>
  45
  46 /* Management base version */
  47 #define IB_MGMT_BASE_VERSION                    1
  48
  49 /* Management classes */
  50 #define IB_MGMT_CLASS_SUBN_LID_ROUTED           0x01
  51 #define IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE       0x81
  52 #define IB_MGMT_CLASS_SUBN_ADM                  0x03
  53 #define IB_MGMT_CLASS_PERF_MGMT                 0x04
  54 #define IB_MGMT_CLASS_BM                        0x05
  55 #define IB_MGMT_CLASS_DEVICE_MGMT               0x06
  56 #define IB_MGMT_CLASS_CM                        0x07
  57 #define IB_MGMT_CLASS_SNMP                      0x08
  58 #define IB_MGMT_CLASS_DEVICE_ADM                0x10
  59 #define IB_MGMT_CLASS_BOOT_MGMT                 0x11
  60 #define IB_MGMT_CLASS_BIS                       0x12
  61 #define IB_MGMT_CLASS_CONG_MGMT                 0x21
  62 #define IB_MGMT_CLASS_VENDOR_RANGE2_START       0x30
  63 #define IB_MGMT_CLASS_VENDOR_RANGE2_END         0x4F
  64
  65 #define IB_OPENIB_OUI                           (0x001405)
  66
  67 /* Management methods */
  68 #define IB_MGMT_METHOD_GET                      0x01
  69 #define IB_MGMT_METHOD_SET                      0x02
  70 #define IB_MGMT_METHOD_GET_RESP                 0x81
  71 #define IB_MGMT_METHOD_SEND                     0x03
  72 #define IB_MGMT_METHOD_TRAP                     0x05
  73 #define IB_MGMT_METHOD_REPORT                   0x06
  74 #define IB_MGMT_METHOD_REPORT_RESP              0x86
  75 #define IB_MGMT_METHOD_TRAP_REPRESS             0x07
  76
  77 #define IB_MGMT_METHOD_RESP                     0x80
  78 #define IB_BM_ATTR_MOD_RESP                     cpu_to_be32(1)
  79
  80 #define IB_MGMT_MAX_METHODS                     128
  81
  82 /* RMPP information */
  83 #define IB_MGMT_RMPP_VERSION                    1
  84
  85 #define IB_MGMT_RMPP_TYPE_DATA                  1
  86 #define IB_MGMT_RMPP_TYPE_ACK                   2
  87 #define IB_MGMT_RMPP_TYPE_STOP                  3
  88 #define IB_MGMT_RMPP_TYPE_ABORT                 4
  89
  90 #define IB_MGMT_RMPP_FLAG_ACTIVE                1
  91 #define IB_MGMT_RMPP_FLAG_FIRST                 (1<<1)
  92 #define IB_MGMT_RMPP_FLAG_LAST                  (1<<2)
  93
  94 #define IB_MGMT_RMPP_NO_RESPTIME                0x1F
  95
  96 #define IB_MGMT_RMPP_STATUS_SUCCESS             0
  97 #define IB_MGMT_RMPP_STATUS_RESX                1
  98 #define IB_MGMT_RMPP_STATUS_ABORT_MIN           118
  99 #define IB_MGMT_RMPP_STATUS_T2L                 118
 100 #define IB_MGMT_RMPP_STATUS_BAD_LEN             119
 101 #define IB_MGMT_RMPP_STATUS_BAD_SEG             120
 102 #define IB_MGMT_RMPP_STATUS_BADT                121
 103 #define IB_MGMT_RMPP_STATUS_W2S                 122
 104 #define IB_MGMT_RMPP_STATUS_S2B                 123
 105 #define IB_MGMT_RMPP_STATUS_BAD_STATUS          124
 106 #define IB_MGMT_RMPP_STATUS_UNV                 125
 107 #define IB_MGMT_RMPP_STATUS_TMR                 126
 108 #define IB_MGMT_RMPP_STATUS_UNSPEC              127
 109 #define IB_MGMT_RMPP_STATUS_ABORT_MAX           127
 110
 111 #define IB_QP0          0
 112 #define IB_QP1          __constant_htonl(1)
 113 #define IB_QP1_QKEY     0x80010000
 114 #define IB_QP_SET_QKEY  0x80000000
 115
 116 #define IB_DEFAULT_PKEY_PARTIAL 0x7FFF
 117 #define IB_DEFAULT_PKEY_FULL    0xFFFF
 118
 119 enum {
 120         IB_MGMT_MAD_HDR = 24,
 121         IB_MGMT_MAD_DATA = 232,
 122         IB_MGMT_RMPP_HDR = 36,
 123         IB_MGMT_RMPP_DATA = 220,
 124         IB_MGMT_VENDOR_HDR = 40,
 125         IB_MGMT_VENDOR_DATA = 216,
 126         IB_MGMT_SA_HDR = 56,
 127         IB_MGMT_SA_DATA = 200,
 128         IB_MGMT_DEVICE_HDR = 64,
 129         IB_MGMT_DEVICE_DATA = 192,
 130 };
 131
 132 struct ib_mad_hdr {
 133         u8      base_version;
 134         u8      mgmt_class;
 135         u8      class_version;
 136         u8      method;
 137         __be16  status;
 138         __be16  class_specific;
 139         __be64  tid;
 140         __be16  attr_id;
 141         __be16  resv;
 142         __be32  attr_mod;
 143 };
 144
 145 struct ib_rmpp_hdr {
 146         u8      rmpp_version;
 147         u8      rmpp_type;
 148         u8      rmpp_rtime_flags;
 149         u8      rmpp_status;
 150         __be32  seg_num;
 151         __be32  paylen_newwin;
 152 };
 153
 154 typedef u64 __bitwise ib_sa_comp_mask;
 155
 156 #define IB_SA_COMP_MASK(n) ((__force ib_sa_comp_mask) cpu_to_be64(1ull << n))
 157
 158 /*
 159  * ib_sa_hdr and ib_sa_mad structures must be packed because they have
 160  * 64-bit fields that are only 32-bit aligned. 64-bit architectures will
 161  * lay them out wrong otherwise.  (And unfortunately they are sent on
 162  * the wire so we can't change the layout)
 163  */
 164 struct ib_sa_hdr {
 165         __be64                  sm_key;
 166         __be16                  attr_offset;
 167         __be16                  reserved;
 168         ib_sa_comp_mask         comp_mask;
 169 } __attribute__ ((packed));
 170
 171 struct ib_mad {
 172         struct ib_mad_hdr       mad_hdr;
 173         u8                      data[IB_MGMT_MAD_DATA];
 174 };
 175
 176 struct ib_rmpp_mad {
 177         struct ib_mad_hdr       mad_hdr;
 178         struct ib_rmpp_hdr      rmpp_hdr;
 179         u8                      data[IB_MGMT_RMPP_DATA];
 180 };
 181
 182 struct ib_sa_mad {
 183         struct ib_mad_hdr       mad_hdr;
 184         struct ib_rmpp_hdr      rmpp_hdr;
 185         struct ib_sa_hdr        sa_hdr;
 186         u8                      data[IB_MGMT_SA_DATA];
 187 } __attribute__ ((packed));
 188
 189 struct ib_vendor_mad {
 190         struct ib_mad_hdr       mad_hdr;
 191         struct ib_rmpp_hdr      rmpp_hdr;
 192         u8                      reserved;
 193         u8                      oui[3];
 194         u8                      data[IB_MGMT_VENDOR_DATA];
 195 };
 196
 197 struct ib_class_port_info
 198 {
 199         u8                      base_version;
 200         u8                      class_version;
 201         __be16                  capability_mask;
 202         u8                      reserved[3];
 203         u8                      resp_time_value;
 204         u8                      redirect_gid[16];
 205         __be32                  redirect_tcslfl;
 206         __be16                  redirect_lid;
 207         __be16                  redirect_pkey;
 208         __be32                  redirect_qp;
 209         __be32                  redirect_qkey;
 210         u8                      trap_gid[16];
 211         __be32                  trap_tcslfl;
 212         __be16                  trap_lid;
 213         __be16                  trap_pkey;
 214         __be32                  trap_hlqp;
 215         __be32                  trap_qkey;
 216 };
 217
 218 /**
 219  * ib_mad_send_buf - MAD data buffer and work request for sends.
 220  * @next: A pointer used to chain together MADs for posting.
 221  * @mad: References an allocated MAD data buffer for MADs that do not have
 222  *   RMPP active.  For MADs using RMPP, references the common and management
 223  *   class specific headers.
 224  * @mad_agent: MAD agent that allocated the buffer.
 225  * @ah: The address handle to use when sending the MAD.
 226  * @context: User-controlled context fields.
 227  * @hdr_len: Indicates the size of the data header of the MAD.  This length
 228  *   includes the common MAD, RMPP, and class specific headers.
 229  * @data_len: Indicates the total size of user-transferred data.
 230  * @seg_count: The number of RMPP segments allocated for this send.
 231  * @seg_size: Size of each RMPP segment.
 232  * @timeout_ms: Time to wait for a response.
 233  * @retries: Number of times to retry a request for a response.
 234  *
 235  * Users are responsible for initializing the MAD buffer itself, with the
 236  * exception of any RMPP header.  Additional segment buffer space allocated
 237  * beyond data_len is padding.
 238  */
 239 struct ib_mad_send_buf {
 240         struct ib_mad_send_buf  *next;
 241         void                    *mad;
 242         struct ib_mad_agent     *mad_agent;
 243         struct ib_ah            *ah;
 244         void                    *context[2];
 245         int                     hdr_len;
 246         int                     data_len;
 247         int                     seg_count;
 248         int                     seg_size;
 249         int                     timeout_ms;
 250         int                     retries;
 251 };
 252
 253 /**
 254  * ib_response_mad - Returns if the specified MAD has been generated in
 255  *   response to a sent request or trap.
 256  */
 257 int ib_response_mad(struct ib_mad *mad);
 258
 259 /**
 260  * ib_get_rmpp_resptime - Returns the RMPP response time.
 261  * @rmpp_hdr: An RMPP header.
 262  */
 263 static inline u8 ib_get_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr)
 264 {
 265         return rmpp_hdr->rmpp_rtime_flags >> 3;
 266 }
 267
 268 /**
 269  * ib_get_rmpp_flags - Returns the RMPP flags.
 270  * @rmpp_hdr: An RMPP header.
 271  */
 272 static inline u8 ib_get_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr)
 273 {
 274         return rmpp_hdr->rmpp_rtime_flags & 0x7;
 275 }
 276
 277 /**
 278  * ib_set_rmpp_resptime - Sets the response time in an RMPP header.
 279  * @rmpp_hdr: An RMPP header.
 280  * @rtime: The response time to set.
 281  */
 282 static inline void ib_set_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr, u8 rtime)
 283 {
 284         rmpp_hdr->rmpp_rtime_flags = ib_get_rmpp_flags(rmpp_hdr) | (rtime << 3);
 285 }
 286
 287 /**
 288  * ib_set_rmpp_flags - Sets the flags in an RMPP header.
 289  * @rmpp_hdr: An RMPP header.
 290  * @flags: The flags to set.
 291  */
 292 static inline void ib_set_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr, u8 flags)
 293 {
 294         rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF1) |
 295                                      (flags & 0x7);
 296 }
 297
 298 struct ib_mad_agent;
 299 struct ib_mad_send_wc;
 300 struct ib_mad_recv_wc;
 301
 302 /**
 303  * ib_mad_send_handler - callback handler for a sent MAD.
 304  * @mad_agent: MAD agent that sent the MAD.
 305  * @mad_send_wc: Send work completion information on the sent MAD.
 306  */
 307 typedef void (*ib_mad_send_handler)(struct ib_mad_agent *mad_agent,
 308                                     struct ib_mad_send_wc *mad_send_wc);
 309
 310 /**
 311  * ib_mad_snoop_handler - Callback handler for snooping sent MADs.
 312  * @mad_agent: MAD agent that snooped the MAD.
 313  * @send_wr: Work request information on the sent MAD.
 314  * @mad_send_wc: Work completion information on the sent MAD.  Valid
 315  *   only for snooping that occurs on a send completion.
 316  *
 317  * Clients snooping MADs should not modify data referenced by the @send_wr
 318  * or @mad_send_wc.
 319  */
 320 typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent,
 321                                      struct ib_mad_send_buf *send_buf,
 322                                      struct ib_mad_send_wc *mad_send_wc);
 323
 324 /**
 325  * ib_mad_recv_handler - callback handler for a received MAD.
 326  * @mad_agent: MAD agent requesting the received MAD.
 327  * @mad_recv_wc: Received work completion information on the received MAD.
 328  *
 329  * MADs received in response to a send request operation will be handed to
 330  * the user before the send operation completes.  All data buffers given
 331  * to registered agents through this routine are owned by the receiving
 332  * client, except for snooping agents.  Clients snooping MADs should not
 333  * modify the data referenced by @mad_recv_wc.
 334  */
 335 typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
 336                                     struct ib_mad_recv_wc *mad_recv_wc);
 337
 338 /**
 339  * ib_mad_agent - Used to track MAD registration with the access layer.
 340  * @device: Reference to device registration is on.
 341  * @qp: Reference to QP used for sending and receiving MADs.
 342  * @mr: Memory region for system memory usable for DMA.
 343  * @recv_handler: Callback handler for a received MAD.
 344  * @send_handler: Callback handler for a sent MAD.
 345  * @snoop_handler: Callback handler for snooped sent MADs.
 346  * @context: User-specified context associated with this registration.
 347  * @hi_tid: Access layer assigned transaction ID for this client.
 348  *   Unsolicited MADs sent by this client will have the upper 32-bits
 349  *   of their TID set to this value.
 350  * @port_num: Port number on which QP is registered
 351  * @rmpp_version: If set, indicates the RMPP version used by this agent.
 352  */
 353 struct ib_mad_agent {
 354         struct ib_device        *device;
 355         struct ib_qp            *qp;
 356         struct ib_mr            *mr;
 357         ib_mad_recv_handler     recv_handler;
 358         ib_mad_send_handler     send_handler;
 359         ib_mad_snoop_handler    snoop_handler;
 360         void                    *context;
 361         u32                     hi_tid;
 362         u8                      port_num;
 363         u8                      rmpp_version;
 364 };
 365
 366 /**
 367  * ib_mad_send_wc - MAD send completion information.
 368  * @send_buf: Send MAD data buffer associated with the send MAD request.
 369  * @status: Completion status.
 370  * @vendor_err: Optional vendor error information returned with a failed
 371  *   request.
 372  */
 373 struct ib_mad_send_wc {
 374         struct ib_mad_send_buf  *send_buf;
 375         enum ib_wc_status       status;
 376         u32                     vendor_err;
 377 };
 378
 379 /**
 380  * ib_mad_recv_buf - received MAD buffer information.
 381  * @list: Reference to next data buffer for a received RMPP MAD.
 382  * @grh: References a data buffer containing the global route header.
 383  *   The data refereced by this buffer is only valid if the GRH is
 384  *   valid.
 385  * @mad: References the start of the received MAD.
 386  */
 387 struct ib_mad_recv_buf {
 388         struct list_head        list;
 389         struct ib_grh           *grh;
 390         struct ib_mad           *mad;
 391 };
 392
 393 /**
 394  * ib_mad_recv_wc - received MAD information.
 395  * @wc: Completion information for the received data.
 396  * @recv_buf: Specifies the location of the received data buffer(s).
 397  * @rmpp_list: Specifies a list of RMPP reassembled received MAD buffers.
 398  * @mad_len: The length of the received MAD, without duplicated headers.
 399  *
 400  * For received response, the wr_id contains a pointer to the ib_mad_send_buf
 401  *   for the corresponding send request.
 402  */
 403 struct ib_mad_recv_wc {
 404         struct ib_wc            *wc;
 405         struct ib_mad_recv_buf  recv_buf;
 406         struct list_head        rmpp_list;
 407         int                     mad_len;
 408 };
 409
 410 /**
 411  * ib_mad_reg_req - MAD registration request
 412  * @mgmt_class: Indicates which management class of MADs should be receive
 413  *   by the caller.  This field is only required if the user wishes to
 414  *   receive unsolicited MADs, otherwise it should be 0.
 415  * @mgmt_class_version: Indicates which version of MADs for the given
 416  *   management class to receive.
 417  * @oui: Indicates IEEE OUI when mgmt_class is a vendor class
 418  *   in the range from 0x30 to 0x4f. Otherwise not used.
 419  * @method_mask: The caller will receive unsolicited MADs for any method
 420  *   where @method_mask = 1.
 421  */
 422 struct ib_mad_reg_req {
 423         u8      mgmt_class;
 424         u8      mgmt_class_version;
 425         u8      oui[3];
 426         DECLARE_BITMAP(method_mask, IB_MGMT_MAX_METHODS);
 427 };
 428
 429 /**
 430  * ib_register_mad_agent - Register to send/receive MADs.
 431  * @device: The device to register with.
 432  * @port_num: The port on the specified device to use.
 433  * @qp_type: Specifies which QP to access.  Must be either
 434  *   IB_QPT_SMI or IB_QPT_GSI.
 435  * @mad_reg_req: Specifies which unsolicited MADs should be received
 436  *   by the caller.  This parameter may be NULL if the caller only
 437  *   wishes to receive solicited responses.
 438  * @rmpp_version: If set, indicates that the client will send
 439  *   and receive MADs that contain the RMPP header for the given version.
 440  *   If set to 0, indicates that RMPP is not used by this client.
 441  * @send_handler: The completion callback routine invoked after a send
 442  *   request has completed.
 443  * @recv_handler: The completion callback routine invoked for a received
 444  *   MAD.
 445  * @context: User specified context associated with the registration.
 446  */
 447 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 448                                            u8 port_num,
 449                                            enum ib_qp_type qp_type,
 450                                            struct ib_mad_reg_req *mad_reg_req,
 451                                            u8 rmpp_version,
 452                                            ib_mad_send_handler send_handler,
 453                                            ib_mad_recv_handler recv_handler,
 454                                            void *context);
 455
 456 enum ib_mad_snoop_flags {
 457         /*IB_MAD_SNOOP_POSTED_SENDS        = 1,*/
 458         /*IB_MAD_SNOOP_RMPP_SENDS          = (1<<1),*/
 459         IB_MAD_SNOOP_SEND_COMPLETIONS      = (1<<2),
 460         /*IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS = (1<<3),*/
 461         IB_MAD_SNOOP_RECVS                 = (1<<4)
 462         /*IB_MAD_SNOOP_RMPP_RECVS          = (1<<5),*/
 463         /*IB_MAD_SNOOP_REDIRECTED_QPS      = (1<<6)*/
 464 };
 465
 466 /**
 467  * ib_register_mad_snoop - Register to snoop sent and received MADs.
 468  * @device: The device to register with.
 469  * @port_num: The port on the specified device to use.
 470  * @qp_type: Specifies which QP traffic to snoop.  Must be either
 471  *   IB_QPT_SMI or IB_QPT_GSI.
 472  * @mad_snoop_flags: Specifies information where snooping occurs.
 473  * @send_handler: The callback routine invoked for a snooped send.
 474  * @recv_handler: The callback routine invoked for a snooped receive.
 475  * @context: User specified context associated with the registration.
 476  */
 477 struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
 478                                            u8 port_num,
 479                                            enum ib_qp_type qp_type,
 480                                            int mad_snoop_flags,
 481                                            ib_mad_snoop_handler snoop_handler,
 482                                            ib_mad_recv_handler recv_handler,
 483                                            void *context);
 484
 485 /**
 486  * ib_unregister_mad_agent - Unregisters a client from using MAD services.
 487  * @mad_agent: Corresponding MAD registration request to deregister.
 488  *
 489  * After invoking this routine, MAD services are no longer usable by the
 490  * client on the associated QP.
 491  */
 492 int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent);
 493
 494 /**
 495  * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
 496  *   with the registered client.
 497  * @send_buf: Specifies the information needed to send the MAD(s).
 498  * @bad_send_buf: Specifies the MAD on which an error was encountered.  This
 499  *   parameter is optional if only a single MAD is posted.
 500  *
 501  * Sent MADs are not guaranteed to complete in the order that they were posted.
 502  *
 503  * If the MAD requires RMPP, the data buffer should contain a single copy
 504  * of the common MAD, RMPP, and class specific headers, followed by the class
 505  * defined data.  If the class defined data would not divide evenly into
 506  * RMPP segments, then space must be allocated at the end of the referenced
 507  * buffer for any required padding.  To indicate the amount of class defined
 508  * data being transferred, the paylen_newwin field in the RMPP header should
 509  * be set to the size of the class specific header plus the amount of class
 510  * defined data being transferred.  The paylen_newwin field should be
 511  * specified in network-byte order.
 512  */
 513 int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
 514                      struct ib_mad_send_buf **bad_send_buf);
 515
 516
 517 /**
 518  * ib_free_recv_mad - Returns data buffers used to receive a MAD.
 519  * @mad_recv_wc: Work completion information for a received MAD.
 520  *
 521  * Clients receiving MADs through their ib_mad_recv_handler must call this
 522  * routine to return the work completion buffers to the access layer.
 523  */
 524 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc);
 525
 526 /**
 527  * ib_cancel_mad - Cancels an outstanding send MAD operation.
 528  * @mad_agent: Specifies the registration associated with sent MAD.
 529  * @send_buf: Indicates the MAD to cancel.
 530  *
 531  * MADs will be returned to the user through the corresponding
 532  * ib_mad_send_handler.
 533  */
 534 void ib_cancel_mad(struct ib_mad_agent *mad_agent,
 535                    struct ib_mad_send_buf *send_buf);
 536
 537 /**
 538  * ib_modify_mad - Modifies an outstanding send MAD operation.
 539  * @mad_agent: Specifies the registration associated with sent MAD.
 540  * @send_buf: Indicates the MAD to modify.
 541  * @timeout_ms: New timeout value for sent MAD.
 542  *
 543  * This call will reset the timeout value for a sent MAD to the specified
 544  * value.
 545  */
 546 int ib_modify_mad(struct ib_mad_agent *mad_agent,
 547                   struct ib_mad_send_buf *send_buf, u32 timeout_ms);
 548
 549 /**
 550  * ib_redirect_mad_qp - Registers a QP for MAD services.
 551  * @qp: Reference to a QP that requires MAD services.
 552  * @rmpp_version: If set, indicates that the client will send
 553  *   and receive MADs that contain the RMPP header for the given version.
 554  *   If set to 0, indicates that RMPP is not used by this client.
 555  * @send_handler: The completion callback routine invoked after a send
 556  *   request has completed.
 557  * @recv_handler: The completion callback routine invoked for a received
 558  *   MAD.
 559  * @context: User specified context associated with the registration.
 560  *
 561  * Use of this call allows clients to use MAD services, such as RMPP,
 562  * on user-owned QPs.  After calling this routine, users may send
 563  * MADs on the specified QP by calling ib_mad_post_send.
 564  */
 565 struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
 566                                         u8 rmpp_version,
 567                                         ib_mad_send_handler send_handler,
 568                                         ib_mad_recv_handler recv_handler,
 569                                         void *context);
 570
 571 /**
 572  * ib_process_mad_wc - Processes a work completion associated with a
 573  *   MAD sent or received on a redirected QP.
 574  * @mad_agent: Specifies the registered MAD service using the redirected QP.
 575  * @wc: References a work completion associated with a sent or received
 576  *   MAD segment.
 577  *
 578  * This routine is used to complete or continue processing on a MAD request.
 579  * If the work completion is associated with a send operation, calling
 580  * this routine is required to continue an RMPP transfer or to wait for a
 581  * corresponding response, if it is a request.  If the work completion is
 582  * associated with a receive operation, calling this routine is required to
 583  * process an inbound or outbound RMPP transfer, or to match a response MAD
 584  * with its corresponding request.
 585  */
 586 int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
 587                       struct ib_wc *wc);
 588
 589 /**
 590  * ib_create_send_mad - Allocate and initialize a data buffer and work request
 591  *   for sending a MAD.
 592  * @mad_agent: Specifies the registered MAD service to associate with the MAD.
 593  * @remote_qpn: Specifies the QPN of the receiving node.
 594  * @pkey_index: Specifies which PKey the MAD will be sent using.  This field
 595  *   is valid only if the remote_qpn is QP 1.
 596  * @rmpp_active: Indicates if the send will enable RMPP.
 597  * @hdr_len: Indicates the size of the data header of the MAD.  This length
 598  *   should include the common MAD header, RMPP header, plus any class
 599  *   specific header.
 600  * @data_len: Indicates the size of any user-transferred data.  The call will
 601  *   automatically adjust the allocated buffer size to account for any
 602  *   additional padding that may be necessary.
 603  * @gfp_mask: GFP mask used for the memory allocation.
 604  *
 605  * This routine allocates a MAD for sending.  The returned MAD send buffer
 606  * will reference a data buffer usable for sending a MAD, along
 607  * with an initialized work request structure.  Users may modify the returned
 608  * MAD data buffer before posting the send.
 609  *
 610  * The returned MAD header, class specific headers, and any padding will be
 611  * cleared.  Users are responsible for initializing the common MAD header,
 612  * any class specific header, and MAD data area.
 613  * If @rmpp_active is set, the RMPP header will be initialized for sending.
 614  */
 615 struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
 616                                             u32 remote_qpn, u16 pkey_index,
 617                                             int rmpp_active,
 618                                             int hdr_len, int data_len,
 619                                             gfp_t gfp_mask);
 620
 621 /**
 622  * ib_is_mad_class_rmpp - returns whether given management class
 623  * supports RMPP.
 624  * @mgmt_class: management class
 625  *
 626  * This routine returns whether the management class supports RMPP.
 627  */
 628 int ib_is_mad_class_rmpp(u8 mgmt_class);
 629
 630 /**
 631  * ib_get_mad_data_offset - returns the data offset for a given
 632  * management class.
 633  * @mgmt_class: management class
 634  *
 635  * This routine returns the data offset in the MAD for the management
 636  * class requested.
 637  */
 638 int ib_get_mad_data_offset(u8 mgmt_class);
 639
 640 /**
 641  * ib_get_rmpp_segment - returns the data buffer for a given RMPP segment.
 642  * @send_buf: Previously allocated send data buffer.
 643  * @seg_num: number of segment to return
 644  *
 645  * This routine returns a pointer to the data buffer of an RMPP MAD.
 646  * Users must provide synchronization to @send_buf around this call.
 647  */
 648 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num);
 649
 650 /**
 651  * ib_free_send_mad - Returns data buffers used to send a MAD.
 652  * @send_buf: Previously allocated send data buffer.
 653  */
 654 void ib_free_send_mad(struct ib_mad_send_buf *send_buf);
 655
 656 #endif /* IB_MAD_H */