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TOMOYO Linux Cross Reference
Linux/include/rdma/ib_mad.h

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  1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
  2 /*
  3  * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
  4  * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
  5  * Copyright (c) 2004 Intel Corporation.  All rights reserved.
  6  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
  7  * Copyright (c) 2004-2006 Voltaire Corporation.  All rights reserved.
  8  */
  9 
 10 #ifndef IB_MAD_H
 11 #define IB_MAD_H
 12 
 13 #include <linux/list.h>
 14 
 15 #include <rdma/ib_verbs.h>
 16 #include <uapi/rdma/ib_user_mad.h>
 17 
 18 /* Management base versions */
 19 #define IB_MGMT_BASE_VERSION                    1
 20 #define OPA_MGMT_BASE_VERSION                   0x80
 21 
 22 #define OPA_SM_CLASS_VERSION                    0x80
 23 
 24 /* Management classes */
 25 #define IB_MGMT_CLASS_SUBN_LID_ROUTED           0x01
 26 #define IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE       0x81
 27 #define IB_MGMT_CLASS_SUBN_ADM                  0x03
 28 #define IB_MGMT_CLASS_PERF_MGMT                 0x04
 29 #define IB_MGMT_CLASS_BM                        0x05
 30 #define IB_MGMT_CLASS_DEVICE_MGMT               0x06
 31 #define IB_MGMT_CLASS_CM                        0x07
 32 #define IB_MGMT_CLASS_SNMP                      0x08
 33 #define IB_MGMT_CLASS_DEVICE_ADM                0x10
 34 #define IB_MGMT_CLASS_BOOT_MGMT                 0x11
 35 #define IB_MGMT_CLASS_BIS                       0x12
 36 #define IB_MGMT_CLASS_CONG_MGMT                 0x21
 37 #define IB_MGMT_CLASS_VENDOR_RANGE2_START       0x30
 38 #define IB_MGMT_CLASS_VENDOR_RANGE2_END         0x4F
 39 
 40 #define IB_OPENIB_OUI                           (0x001405)
 41 
 42 /* Management methods */
 43 #define IB_MGMT_METHOD_GET                      0x01
 44 #define IB_MGMT_METHOD_SET                      0x02
 45 #define IB_MGMT_METHOD_GET_RESP                 0x81
 46 #define IB_MGMT_METHOD_SEND                     0x03
 47 #define IB_MGMT_METHOD_TRAP                     0x05
 48 #define IB_MGMT_METHOD_REPORT                   0x06
 49 #define IB_MGMT_METHOD_REPORT_RESP              0x86
 50 #define IB_MGMT_METHOD_TRAP_REPRESS             0x07
 51 
 52 #define IB_MGMT_METHOD_RESP                     0x80
 53 #define IB_BM_ATTR_MOD_RESP                     cpu_to_be32(1)
 54 
 55 #define IB_MGMT_MAX_METHODS                     128
 56 
 57 /* MAD Status field bit masks */
 58 #define IB_MGMT_MAD_STATUS_SUCCESS                      0x0000
 59 #define IB_MGMT_MAD_STATUS_BUSY                         0x0001
 60 #define IB_MGMT_MAD_STATUS_REDIRECT_REQD                0x0002
 61 #define IB_MGMT_MAD_STATUS_BAD_VERSION                  0x0004
 62 #define IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD           0x0008
 63 #define IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB    0x000c
 64 #define IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE         0x001c
 65 
 66 /* RMPP information */
 67 #define IB_MGMT_RMPP_VERSION                    1
 68 
 69 #define IB_MGMT_RMPP_TYPE_DATA                  1
 70 #define IB_MGMT_RMPP_TYPE_ACK                   2
 71 #define IB_MGMT_RMPP_TYPE_STOP                  3
 72 #define IB_MGMT_RMPP_TYPE_ABORT                 4
 73 
 74 #define IB_MGMT_RMPP_FLAG_ACTIVE                1
 75 #define IB_MGMT_RMPP_FLAG_FIRST                 (1<<1)
 76 #define IB_MGMT_RMPP_FLAG_LAST                  (1<<2)
 77 
 78 #define IB_MGMT_RMPP_NO_RESPTIME                0x1F
 79 
 80 #define IB_MGMT_RMPP_STATUS_SUCCESS             0
 81 #define IB_MGMT_RMPP_STATUS_RESX                1
 82 #define IB_MGMT_RMPP_STATUS_ABORT_MIN           118
 83 #define IB_MGMT_RMPP_STATUS_T2L                 118
 84 #define IB_MGMT_RMPP_STATUS_BAD_LEN             119
 85 #define IB_MGMT_RMPP_STATUS_BAD_SEG             120
 86 #define IB_MGMT_RMPP_STATUS_BADT                121
 87 #define IB_MGMT_RMPP_STATUS_W2S                 122
 88 #define IB_MGMT_RMPP_STATUS_S2B                 123
 89 #define IB_MGMT_RMPP_STATUS_BAD_STATUS          124
 90 #define IB_MGMT_RMPP_STATUS_UNV                 125
 91 #define IB_MGMT_RMPP_STATUS_TMR                 126
 92 #define IB_MGMT_RMPP_STATUS_UNSPEC              127
 93 #define IB_MGMT_RMPP_STATUS_ABORT_MAX           127
 94 
 95 #define IB_QP0          0
 96 #define IB_QP1          cpu_to_be32(1)
 97 #define IB_QP1_QKEY     0x80010000
 98 #define IB_QP_SET_QKEY  0x80000000
 99 
100 #define IB_DEFAULT_PKEY_PARTIAL 0x7FFF
101 #define IB_DEFAULT_PKEY_FULL    0xFFFF
102 
103 /*
104  * Generic trap/notice types
105  */
106 #define IB_NOTICE_TYPE_FATAL    0x80
107 #define IB_NOTICE_TYPE_URGENT   0x81
108 #define IB_NOTICE_TYPE_SECURITY 0x82
109 #define IB_NOTICE_TYPE_SM       0x83
110 #define IB_NOTICE_TYPE_INFO     0x84
111 
112 /*
113  * Generic trap/notice producers
114  */
115 #define IB_NOTICE_PROD_CA               cpu_to_be16(1)
116 #define IB_NOTICE_PROD_SWITCH           cpu_to_be16(2)
117 #define IB_NOTICE_PROD_ROUTER           cpu_to_be16(3)
118 #define IB_NOTICE_PROD_CLASS_MGR        cpu_to_be16(4)
119 
120 enum {
121         IB_MGMT_MAD_HDR = 24,
122         IB_MGMT_MAD_DATA = 232,
123         IB_MGMT_RMPP_HDR = 36,
124         IB_MGMT_RMPP_DATA = 220,
125         IB_MGMT_VENDOR_HDR = 40,
126         IB_MGMT_VENDOR_DATA = 216,
127         IB_MGMT_SA_HDR = 56,
128         IB_MGMT_SA_DATA = 200,
129         IB_MGMT_DEVICE_HDR = 64,
130         IB_MGMT_DEVICE_DATA = 192,
131         IB_MGMT_MAD_SIZE = IB_MGMT_MAD_HDR + IB_MGMT_MAD_DATA,
132         OPA_MGMT_MAD_DATA = 2024,
133         OPA_MGMT_RMPP_DATA = 2012,
134         OPA_MGMT_MAD_SIZE = IB_MGMT_MAD_HDR + OPA_MGMT_MAD_DATA,
135 };
136 
137 struct ib_mad_hdr {
138         u8      base_version;
139         u8      mgmt_class;
140         u8      class_version;
141         u8      method;
142         __be16  status;
143         __be16  class_specific;
144         __be64  tid;
145         __be16  attr_id;
146         __be16  resv;
147         __be32  attr_mod;
148 };
149 
150 struct ib_rmpp_hdr {
151         u8      rmpp_version;
152         u8      rmpp_type;
153         u8      rmpp_rtime_flags;
154         u8      rmpp_status;
155         __be32  seg_num;
156         __be32  paylen_newwin;
157 };
158 
159 typedef u64 __bitwise ib_sa_comp_mask;
160 
161 #define IB_SA_COMP_MASK(n) ((__force ib_sa_comp_mask) cpu_to_be64(1ull << (n)))
162 
163 /*
164  * ib_sa_hdr and ib_sa_mad structures must be packed because they have
165  * 64-bit fields that are only 32-bit aligned. 64-bit architectures will
166  * lay them out wrong otherwise.  (And unfortunately they are sent on
167  * the wire so we can't change the layout)
168  */
169 struct ib_sa_hdr {
170         __be64                  sm_key;
171         __be16                  attr_offset;
172         __be16                  reserved;
173         ib_sa_comp_mask         comp_mask;
174 } __packed;
175 
176 struct ib_mad {
177         struct ib_mad_hdr       mad_hdr;
178         u8                      data[IB_MGMT_MAD_DATA];
179 };
180 
181 struct opa_mad {
182         struct ib_mad_hdr       mad_hdr;
183         u8                      data[OPA_MGMT_MAD_DATA];
184 };
185 
186 struct ib_rmpp_mad {
187         struct ib_mad_hdr       mad_hdr;
188         struct ib_rmpp_hdr      rmpp_hdr;
189         u8                      data[IB_MGMT_RMPP_DATA];
190 };
191 
192 struct opa_rmpp_mad {
193         struct ib_mad_hdr       mad_hdr;
194         struct ib_rmpp_hdr      rmpp_hdr;
195         u8                      data[OPA_MGMT_RMPP_DATA];
196 };
197 
198 struct ib_sa_mad {
199         struct ib_mad_hdr       mad_hdr;
200         struct ib_rmpp_hdr      rmpp_hdr;
201         struct ib_sa_hdr        sa_hdr;
202         u8                      data[IB_MGMT_SA_DATA];
203 } __packed;
204 
205 struct ib_vendor_mad {
206         struct ib_mad_hdr       mad_hdr;
207         struct ib_rmpp_hdr      rmpp_hdr;
208         u8                      reserved;
209         u8                      oui[3];
210         u8                      data[IB_MGMT_VENDOR_DATA];
211 };
212 
213 #define IB_MGMT_CLASSPORTINFO_ATTR_ID   cpu_to_be16(0x0001)
214 
215 #define IB_CLASS_PORT_INFO_RESP_TIME_MASK       0x1F
216 #define IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE 5
217 
218 struct ib_class_port_info {
219         u8                      base_version;
220         u8                      class_version;
221         __be16                  capability_mask;
222           /* 27 bits for cap_mask2, 5 bits for resp_time */
223         __be32                  cap_mask2_resp_time;
224         u8                      redirect_gid[16];
225         __be32                  redirect_tcslfl;
226         __be16                  redirect_lid;
227         __be16                  redirect_pkey;
228         __be32                  redirect_qp;
229         __be32                  redirect_qkey;
230         u8                      trap_gid[16];
231         __be32                  trap_tcslfl;
232         __be16                  trap_lid;
233         __be16                  trap_pkey;
234         __be32                  trap_hlqp;
235         __be32                  trap_qkey;
236 };
237 
238 /* PortInfo CapabilityMask */
239 enum ib_port_capability_mask_bits {
240         IB_PORT_SM = 1 << 1,
241         IB_PORT_NOTICE_SUP = 1 << 2,
242         IB_PORT_TRAP_SUP = 1 << 3,
243         IB_PORT_OPT_IPD_SUP = 1 << 4,
244         IB_PORT_AUTO_MIGR_SUP = 1 << 5,
245         IB_PORT_SL_MAP_SUP = 1 << 6,
246         IB_PORT_MKEY_NVRAM = 1 << 7,
247         IB_PORT_PKEY_NVRAM = 1 << 8,
248         IB_PORT_LED_INFO_SUP = 1 << 9,
249         IB_PORT_SM_DISABLED = 1 << 10,
250         IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11,
251         IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
252         IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14,
253         IB_PORT_CAP_MASK2_SUP = 1 << 15,
254         IB_PORT_CM_SUP = 1 << 16,
255         IB_PORT_SNMP_TUNNEL_SUP = 1 << 17,
256         IB_PORT_REINIT_SUP = 1 << 18,
257         IB_PORT_DEVICE_MGMT_SUP = 1 << 19,
258         IB_PORT_VENDOR_CLASS_SUP = 1 << 20,
259         IB_PORT_DR_NOTICE_SUP = 1 << 21,
260         IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22,
261         IB_PORT_BOOT_MGMT_SUP = 1 << 23,
262         IB_PORT_LINK_LATENCY_SUP = 1 << 24,
263         IB_PORT_CLIENT_REG_SUP = 1 << 25,
264         IB_PORT_OTHER_LOCAL_CHANGES_SUP = 1 << 26,
265         IB_PORT_LINK_SPEED_WIDTH_TABLE_SUP = 1 << 27,
266         IB_PORT_VENDOR_SPECIFIC_MADS_TABLE_SUP = 1 << 28,
267         IB_PORT_MCAST_PKEY_TRAP_SUPPRESSION_SUP = 1 << 29,
268         IB_PORT_MCAST_FDB_TOP_SUP = 1 << 30,
269         IB_PORT_HIERARCHY_INFO_SUP = 1ULL << 31,
270 };
271 
272 enum ib_port_capability_mask2_bits {
273         IB_PORT_SET_NODE_DESC_SUP               = 1 << 0,
274         IB_PORT_EX_PORT_INFO_EX_SUP             = 1 << 1,
275         IB_PORT_VIRT_SUP                        = 1 << 2,
276         IB_PORT_SWITCH_PORT_STATE_TABLE_SUP     = 1 << 3,
277         IB_PORT_LINK_WIDTH_2X_SUP               = 1 << 4,
278         IB_PORT_LINK_SPEED_HDR_SUP              = 1 << 5,
279         IB_PORT_LINK_SPEED_NDR_SUP              = 1 << 10,
280         IB_PORT_EXTENDED_SPEEDS2_SUP            = 1 << 11,
281         IB_PORT_LINK_SPEED_XDR_SUP              = 1 << 12,
282 };
283 
284 #define OPA_CLASS_PORT_INFO_PR_SUPPORT BIT(26)
285 
286 struct opa_class_port_info {
287         u8 base_version;
288         u8 class_version;
289         __be16 cap_mask;
290         __be32 cap_mask2_resp_time;
291 
292         u8 redirect_gid[16];
293         __be32 redirect_tc_fl;
294         __be32 redirect_lid;
295         __be32 redirect_sl_qp;
296         __be32 redirect_qkey;
297 
298         u8 trap_gid[16];
299         __be32 trap_tc_fl;
300         __be32 trap_lid;
301         __be32 trap_hl_qp;
302         __be32 trap_qkey;
303 
304         __be16 trap_pkey;
305         __be16 redirect_pkey;
306 
307         u8 trap_sl_rsvd;
308         u8 reserved[3];
309 } __packed;
310 
311 /**
312  * ib_get_cpi_resp_time - Returns the resp_time value from
313  * cap_mask2_resp_time in ib_class_port_info.
314  * @cpi: A struct ib_class_port_info mad.
315  */
316 static inline u8 ib_get_cpi_resp_time(struct ib_class_port_info *cpi)
317 {
318         return (u8)(be32_to_cpu(cpi->cap_mask2_resp_time) &
319                     IB_CLASS_PORT_INFO_RESP_TIME_MASK);
320 }
321 
322 /**
323  * ib_set_cpi_resptime - Sets the response time in an
324  * ib_class_port_info mad.
325  * @cpi: A struct ib_class_port_info.
326  * @rtime: The response time to set.
327  */
328 static inline void ib_set_cpi_resp_time(struct ib_class_port_info *cpi,
329                                         u8 rtime)
330 {
331         cpi->cap_mask2_resp_time =
332                 (cpi->cap_mask2_resp_time &
333                  cpu_to_be32(~IB_CLASS_PORT_INFO_RESP_TIME_MASK)) |
334                 cpu_to_be32(rtime & IB_CLASS_PORT_INFO_RESP_TIME_MASK);
335 }
336 
337 /**
338  * ib_get_cpi_capmask2 - Returns the capmask2 value from
339  * cap_mask2_resp_time in ib_class_port_info.
340  * @cpi: A struct ib_class_port_info mad.
341  */
342 static inline u32 ib_get_cpi_capmask2(struct ib_class_port_info *cpi)
343 {
344         return (be32_to_cpu(cpi->cap_mask2_resp_time) >>
345                 IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE);
346 }
347 
348 /**
349  * ib_set_cpi_capmask2 - Sets the capmask2 in an
350  * ib_class_port_info mad.
351  * @cpi: A struct ib_class_port_info.
352  * @capmask2: The capmask2 to set.
353  */
354 static inline void ib_set_cpi_capmask2(struct ib_class_port_info *cpi,
355                                        u32 capmask2)
356 {
357         cpi->cap_mask2_resp_time =
358                 (cpi->cap_mask2_resp_time &
359                  cpu_to_be32(IB_CLASS_PORT_INFO_RESP_TIME_MASK)) |
360                 cpu_to_be32(capmask2 <<
361                             IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE);
362 }
363 
364 /**
365  * opa_get_cpi_capmask2 - Returns the capmask2 value from
366  * cap_mask2_resp_time in ib_class_port_info.
367  * @cpi: A struct opa_class_port_info mad.
368  */
369 static inline u32 opa_get_cpi_capmask2(struct opa_class_port_info *cpi)
370 {
371         return (be32_to_cpu(cpi->cap_mask2_resp_time) >>
372                 IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE);
373 }
374 
375 struct ib_mad_notice_attr {
376         u8 generic_type;
377         u8 prod_type_msb;
378         __be16 prod_type_lsb;
379         __be16 trap_num;
380         __be16 issuer_lid;
381         __be16 toggle_count;
382 
383         union {
384                 struct {
385                         u8      details[54];
386                 } raw_data;
387 
388                 struct {
389                         __be16  reserved;
390                         __be16  lid;            /* where violation happened */
391                         u8      port_num;       /* where violation happened */
392                 } __packed ntc_129_131;
393 
394                 struct {
395                         __be16  reserved;
396                         __be16  lid;            /* LID where change occurred */
397                         u8      reserved2;
398                         u8      local_changes;  /* low bit - local changes */
399                         __be32  new_cap_mask;   /* new capability mask */
400                         u8      reserved3;
401                         u8      change_flags;   /* low 3 bits only */
402                 } __packed ntc_144;
403 
404                 struct {
405                         __be16  reserved;
406                         __be16  lid;            /* lid where sys guid changed */
407                         __be16  reserved2;
408                         __be64  new_sys_guid;
409                 } __packed ntc_145;
410 
411                 struct {
412                         __be16  reserved;
413                         __be16  lid;
414                         __be16  dr_slid;
415                         u8      method;
416                         u8      reserved2;
417                         __be16  attr_id;
418                         __be32  attr_mod;
419                         __be64  mkey;
420                         u8      reserved3;
421                         u8      dr_trunc_hop;
422                         u8      dr_rtn_path[30];
423                 } __packed ntc_256;
424 
425                 struct {
426                         __be16          reserved;
427                         __be16          lid1;
428                         __be16          lid2;
429                         __be32          key;
430                         __be32          sl_qp1; /* SL: high 4 bits */
431                         __be32          qp2;    /* high 8 bits reserved */
432                         union ib_gid    gid1;
433                         union ib_gid    gid2;
434                 } __packed ntc_257_258;
435 
436         } details;
437 };
438 
439 /**
440  * ib_mad_send_buf - MAD data buffer and work request for sends.
441  * @next: A pointer used to chain together MADs for posting.
442  * @mad: References an allocated MAD data buffer for MADs that do not have
443  *   RMPP active.  For MADs using RMPP, references the common and management
444  *   class specific headers.
445  * @mad_agent: MAD agent that allocated the buffer.
446  * @ah: The address handle to use when sending the MAD.
447  * @context: User-controlled context fields.
448  * @hdr_len: Indicates the size of the data header of the MAD.  This length
449  *   includes the common MAD, RMPP, and class specific headers.
450  * @data_len: Indicates the total size of user-transferred data.
451  * @seg_count: The number of RMPP segments allocated for this send.
452  * @seg_size: Size of the data in each RMPP segment.  This does not include
453  *   class specific headers.
454  * @seg_rmpp_size: Size of each RMPP segment including the class specific
455  *   headers.
456  * @timeout_ms: Time to wait for a response.
457  * @retries: Number of times to retry a request for a response.  For MADs
458  *   using RMPP, this applies per window.  On completion, returns the number
459  *   of retries needed to complete the transfer.
460  *
461  * Users are responsible for initializing the MAD buffer itself, with the
462  * exception of any RMPP header.  Additional segment buffer space allocated
463  * beyond data_len is padding.
464  */
465 struct ib_mad_send_buf {
466         struct ib_mad_send_buf  *next;
467         void                    *mad;
468         struct ib_mad_agent     *mad_agent;
469         struct ib_ah            *ah;
470         void                    *context[2];
471         int                     hdr_len;
472         int                     data_len;
473         int                     seg_count;
474         int                     seg_size;
475         int                     seg_rmpp_size;
476         int                     timeout_ms;
477         int                     retries;
478 };
479 
480 /**
481  * ib_response_mad - Returns if the specified MAD has been generated in
482  *   response to a sent request or trap.
483  */
484 int ib_response_mad(const struct ib_mad_hdr *hdr);
485 
486 /**
487  * ib_get_rmpp_resptime - Returns the RMPP response time.
488  * @rmpp_hdr: An RMPP header.
489  */
490 static inline u8 ib_get_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr)
491 {
492         return rmpp_hdr->rmpp_rtime_flags >> 3;
493 }
494 
495 /**
496  * ib_get_rmpp_flags - Returns the RMPP flags.
497  * @rmpp_hdr: An RMPP header.
498  */
499 static inline u8 ib_get_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr)
500 {
501         return rmpp_hdr->rmpp_rtime_flags & 0x7;
502 }
503 
504 /**
505  * ib_set_rmpp_resptime - Sets the response time in an RMPP header.
506  * @rmpp_hdr: An RMPP header.
507  * @rtime: The response time to set.
508  */
509 static inline void ib_set_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr, u8 rtime)
510 {
511         rmpp_hdr->rmpp_rtime_flags = ib_get_rmpp_flags(rmpp_hdr) | (rtime << 3);
512 }
513 
514 /**
515  * ib_set_rmpp_flags - Sets the flags in an RMPP header.
516  * @rmpp_hdr: An RMPP header.
517  * @flags: The flags to set.
518  */
519 static inline void ib_set_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr, u8 flags)
520 {
521         rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF8) |
522                                      (flags & 0x7);
523 }
524 
525 struct ib_mad_agent;
526 struct ib_mad_send_wc;
527 struct ib_mad_recv_wc;
528 
529 /**
530  * ib_mad_send_handler - callback handler for a sent MAD.
531  * @mad_agent: MAD agent that sent the MAD.
532  * @mad_send_wc: Send work completion information on the sent MAD.
533  */
534 typedef void (*ib_mad_send_handler)(struct ib_mad_agent *mad_agent,
535                                     struct ib_mad_send_wc *mad_send_wc);
536 
537 /**
538  * ib_mad_recv_handler - callback handler for a received MAD.
539  * @mad_agent: MAD agent requesting the received MAD.
540  * @send_buf: Send buffer if found, else NULL
541  * @mad_recv_wc: Received work completion information on the received MAD.
542  *
543  * MADs received in response to a send request operation will be handed to
544  * the user before the send operation completes.  All data buffers given
545  * to registered agents through this routine are owned by the receiving
546  * client.
547  */
548 typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
549                                     struct ib_mad_send_buf *send_buf,
550                                     struct ib_mad_recv_wc *mad_recv_wc);
551 
552 /**
553  * ib_mad_agent - Used to track MAD registration with the access layer.
554  * @device: Reference to device registration is on.
555  * @qp: Reference to QP used for sending and receiving MADs.
556  * @mr: Memory region for system memory usable for DMA.
557  * @recv_handler: Callback handler for a received MAD.
558  * @send_handler: Callback handler for a sent MAD.
559  * @context: User-specified context associated with this registration.
560  * @hi_tid: Access layer assigned transaction ID for this client.
561  *   Unsolicited MADs sent by this client will have the upper 32-bits
562  *   of their TID set to this value.
563  * @flags: registration flags
564  * @port_num: Port number on which QP is registered
565  * @rmpp_version: If set, indicates the RMPP version used by this agent.
566  */
567 enum {
568         IB_MAD_USER_RMPP = IB_USER_MAD_USER_RMPP,
569 };
570 struct ib_mad_agent {
571         struct ib_device        *device;
572         struct ib_qp            *qp;
573         ib_mad_recv_handler     recv_handler;
574         ib_mad_send_handler     send_handler;
575         void                    *context;
576         u32                     hi_tid;
577         u32                     flags;
578         void                    *security;
579         struct list_head        mad_agent_sec_list;
580         u8                      port_num;
581         u8                      rmpp_version;
582         bool                    smp_allowed;
583 };
584 
585 /**
586  * ib_mad_send_wc - MAD send completion information.
587  * @send_buf: Send MAD data buffer associated with the send MAD request.
588  * @status: Completion status.
589  * @vendor_err: Optional vendor error information returned with a failed
590  *   request.
591  */
592 struct ib_mad_send_wc {
593         struct ib_mad_send_buf  *send_buf;
594         enum ib_wc_status       status;
595         u32                     vendor_err;
596 };
597 
598 /**
599  * ib_mad_recv_buf - received MAD buffer information.
600  * @list: Reference to next data buffer for a received RMPP MAD.
601  * @grh: References a data buffer containing the global route header.
602  *   The data refereced by this buffer is only valid if the GRH is
603  *   valid.
604  * @mad: References the start of the received MAD.
605  */
606 struct ib_mad_recv_buf {
607         struct list_head        list;
608         struct ib_grh           *grh;
609         union {
610                 struct ib_mad   *mad;
611                 struct opa_mad  *opa_mad;
612         };
613 };
614 
615 /**
616  * ib_mad_recv_wc - received MAD information.
617  * @wc: Completion information for the received data.
618  * @recv_buf: Specifies the location of the received data buffer(s).
619  * @rmpp_list: Specifies a list of RMPP reassembled received MAD buffers.
620  * @mad_len: The length of the received MAD, without duplicated headers.
621  * @mad_seg_size: The size of individual MAD segments
622  *
623  * For received response, the wr_id contains a pointer to the ib_mad_send_buf
624  *   for the corresponding send request.
625  */
626 struct ib_mad_recv_wc {
627         struct ib_wc            *wc;
628         struct ib_mad_recv_buf  recv_buf;
629         struct list_head        rmpp_list;
630         int                     mad_len;
631         size_t                  mad_seg_size;
632 };
633 
634 /**
635  * ib_mad_reg_req - MAD registration request
636  * @mgmt_class: Indicates which management class of MADs should be receive
637  *   by the caller.  This field is only required if the user wishes to
638  *   receive unsolicited MADs, otherwise it should be 0.
639  * @mgmt_class_version: Indicates which version of MADs for the given
640  *   management class to receive.
641  * @oui: Indicates IEEE OUI when mgmt_class is a vendor class
642  *   in the range from 0x30 to 0x4f. Otherwise not used.
643  * @method_mask: The caller will receive unsolicited MADs for any method
644  *   where @method_mask = 1.
645  *
646  */
647 struct ib_mad_reg_req {
648         u8      mgmt_class;
649         u8      mgmt_class_version;
650         u8      oui[3];
651         DECLARE_BITMAP(method_mask, IB_MGMT_MAX_METHODS);
652 };
653 
654 /**
655  * ib_register_mad_agent - Register to send/receive MADs.
656  * @device: The device to register with.
657  * @port_num: The port on the specified device to use.
658  * @qp_type: Specifies which QP to access.  Must be either
659  *   IB_QPT_SMI or IB_QPT_GSI.
660  * @mad_reg_req: Specifies which unsolicited MADs should be received
661  *   by the caller.  This parameter may be NULL if the caller only
662  *   wishes to receive solicited responses.
663  * @rmpp_version: If set, indicates that the client will send
664  *   and receive MADs that contain the RMPP header for the given version.
665  *   If set to 0, indicates that RMPP is not used by this client.
666  * @send_handler: The completion callback routine invoked after a send
667  *   request has completed.
668  * @recv_handler: The completion callback routine invoked for a received
669  *   MAD.
670  * @context: User specified context associated with the registration.
671  * @registration_flags: Registration flags to set for this agent
672  */
673 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
674                                            u32 port_num,
675                                            enum ib_qp_type qp_type,
676                                            struct ib_mad_reg_req *mad_reg_req,
677                                            u8 rmpp_version,
678                                            ib_mad_send_handler send_handler,
679                                            ib_mad_recv_handler recv_handler,
680                                            void *context,
681                                            u32 registration_flags);
682 /**
683  * ib_unregister_mad_agent - Unregisters a client from using MAD services.
684  * @mad_agent: Corresponding MAD registration request to deregister.
685  *
686  * After invoking this routine, MAD services are no longer usable by the
687  * client on the associated QP.
688  */
689 void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent);
690 
691 /**
692  * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
693  *   with the registered client.
694  * @send_buf: Specifies the information needed to send the MAD(s).
695  * @bad_send_buf: Specifies the MAD on which an error was encountered.  This
696  *   parameter is optional if only a single MAD is posted.
697  *
698  * Sent MADs are not guaranteed to complete in the order that they were posted.
699  *
700  * If the MAD requires RMPP, the data buffer should contain a single copy
701  * of the common MAD, RMPP, and class specific headers, followed by the class
702  * defined data.  If the class defined data would not divide evenly into
703  * RMPP segments, then space must be allocated at the end of the referenced
704  * buffer for any required padding.  To indicate the amount of class defined
705  * data being transferred, the paylen_newwin field in the RMPP header should
706  * be set to the size of the class specific header plus the amount of class
707  * defined data being transferred.  The paylen_newwin field should be
708  * specified in network-byte order.
709  */
710 int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
711                      struct ib_mad_send_buf **bad_send_buf);
712 
713 
714 /**
715  * ib_free_recv_mad - Returns data buffers used to receive a MAD.
716  * @mad_recv_wc: Work completion information for a received MAD.
717  *
718  * Clients receiving MADs through their ib_mad_recv_handler must call this
719  * routine to return the work completion buffers to the access layer.
720  */
721 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc);
722 
723 /**
724  * ib_modify_mad - Modifies an outstanding send MAD operation.
725  * @send_buf: Indicates the MAD to modify.
726  * @timeout_ms: New timeout value for sent MAD.
727  *
728  * This call will reset the timeout value for a sent MAD to the specified
729  * value.
730  */
731 int ib_modify_mad(struct ib_mad_send_buf *send_buf, u32 timeout_ms);
732 
733 /**
734  * ib_cancel_mad - Cancels an outstanding send MAD operation.
735  * @send_buf: Indicates the MAD to cancel.
736  *
737  * MADs will be returned to the user through the corresponding
738  * ib_mad_send_handler.
739  */
740 static inline void ib_cancel_mad(struct ib_mad_send_buf *send_buf)
741 {
742         ib_modify_mad(send_buf, 0);
743 }
744 
745 /**
746  * ib_create_send_mad - Allocate and initialize a data buffer and work request
747  *   for sending a MAD.
748  * @mad_agent: Specifies the registered MAD service to associate with the MAD.
749  * @remote_qpn: Specifies the QPN of the receiving node.
750  * @pkey_index: Specifies which PKey the MAD will be sent using.  This field
751  *   is valid only if the remote_qpn is QP 1.
752  * @rmpp_active: Indicates if the send will enable RMPP.
753  * @hdr_len: Indicates the size of the data header of the MAD.  This length
754  *   should include the common MAD header, RMPP header, plus any class
755  *   specific header.
756  * @data_len: Indicates the size of any user-transferred data.  The call will
757  *   automatically adjust the allocated buffer size to account for any
758  *   additional padding that may be necessary.
759  * @gfp_mask: GFP mask used for the memory allocation.
760  * @base_version: Base Version of this MAD
761  *
762  * This routine allocates a MAD for sending.  The returned MAD send buffer
763  * will reference a data buffer usable for sending a MAD, along
764  * with an initialized work request structure.  Users may modify the returned
765  * MAD data buffer before posting the send.
766  *
767  * The returned MAD header, class specific headers, and any padding will be
768  * cleared.  Users are responsible for initializing the common MAD header,
769  * any class specific header, and MAD data area.
770  * If @rmpp_active is set, the RMPP header will be initialized for sending.
771  */
772 struct ib_mad_send_buf *ib_create_send_mad(struct ib_mad_agent *mad_agent,
773                                            u32 remote_qpn, u16 pkey_index,
774                                            int rmpp_active,
775                                            int hdr_len, int data_len,
776                                            gfp_t gfp_mask,
777                                            u8 base_version);
778 
779 /**
780  * ib_is_mad_class_rmpp - returns whether given management class
781  * supports RMPP.
782  * @mgmt_class: management class
783  *
784  * This routine returns whether the management class supports RMPP.
785  */
786 int ib_is_mad_class_rmpp(u8 mgmt_class);
787 
788 /**
789  * ib_get_mad_data_offset - returns the data offset for a given
790  * management class.
791  * @mgmt_class: management class
792  *
793  * This routine returns the data offset in the MAD for the management
794  * class requested.
795  */
796 int ib_get_mad_data_offset(u8 mgmt_class);
797 
798 /**
799  * ib_get_rmpp_segment - returns the data buffer for a given RMPP segment.
800  * @send_buf: Previously allocated send data buffer.
801  * @seg_num: number of segment to return
802  *
803  * This routine returns a pointer to the data buffer of an RMPP MAD.
804  * Users must provide synchronization to @send_buf around this call.
805  */
806 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num);
807 
808 /**
809  * ib_free_send_mad - Returns data buffers used to send a MAD.
810  * @send_buf: Previously allocated send data buffer.
811  */
812 void ib_free_send_mad(struct ib_mad_send_buf *send_buf);
813 
814 /**
815  * ib_mad_kernel_rmpp_agent - Returns if the agent is performing RMPP.
816  * @agent: the agent in question
817  * @return: true if agent is performing rmpp, false otherwise.
818  */
819 int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent);
820 
821 #endif /* IB_MAD_H */
822 

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