aboutsummaryrefslogtreecommitdiff
path: root/include/rdma/ib_verbs.h
blob: bf5daafe8ecc09ca4d846906ed76c6599cdd1a53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
/*
 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
 * Copyright (c) 2004 Intel Corporation.  All rights reserved.
 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
 * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#if !defined(IB_VERBS_H)
#define IB_VERBS_H

#include <linux/types.h>
#include <linux/device.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/rwsem.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>

#include <linux/atomic.h>
#include <asm/uaccess.h>

extern struct workqueue_struct *ib_wq;

union ib_gid {
	u8	raw[16];
	struct {
		__be64	subnet_prefix;
		__be64	interface_id;
	} global;
};

enum rdma_node_type {
	/* IB values map to NodeInfo:NodeType. */
	RDMA_NODE_IB_CA 	= 1,
	RDMA_NODE_IB_SWITCH,
	RDMA_NODE_IB_ROUTER,
	RDMA_NODE_RNIC
};

enum rdma_transport_type {
	RDMA_TRANSPORT_IB,
	RDMA_TRANSPORT_IWARP
};

enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type) __attribute_const__;

enum rdma_link_layer {
	IB_LINK_LAYER_UNSPECIFIED,
	IB_LINK_LAYER_INFINIBAND,
	IB_LINK_LAYER_ETHERNET,
};

enum ib_device_cap_flags {
	IB_DEVICE_RESIZE_MAX_WR		= 1,
	IB_DEVICE_BAD_PKEY_CNTR		= (1<<1),
	IB_DEVICE_BAD_QKEY_CNTR		= (1<<2),
	IB_DEVICE_RAW_MULTI		= (1<<3),
	IB_DEVICE_AUTO_PATH_MIG		= (1<<4),
	IB_DEVICE_CHANGE_PHY_PORT	= (1<<5),
	IB_DEVICE_UD_AV_PORT_ENFORCE	= (1<<6),
	IB_DEVICE_CURR_QP_STATE_MOD	= (1<<7),
	IB_DEVICE_SHUTDOWN_PORT		= (1<<8),
	IB_DEVICE_INIT_TYPE		= (1<<9),
	IB_DEVICE_PORT_ACTIVE_EVENT	= (1<<10),
	IB_DEVICE_SYS_IMAGE_GUID	= (1<<11),
	IB_DEVICE_RC_RNR_NAK_GEN	= (1<<12),
	IB_DEVICE_SRQ_RESIZE		= (1<<13),
	IB_DEVICE_N_NOTIFY_CQ		= (1<<14),
	IB_DEVICE_LOCAL_DMA_LKEY	= (1<<15),
	IB_DEVICE_RESERVED		= (1<<16), /* old SEND_W_INV */
	IB_DEVICE_MEM_WINDOW		= (1<<17),
	/*
	 * Devices should set IB_DEVICE_UD_IP_SUM if they support
	 * insertion of UDP and TCP checksum on outgoing UD IPoIB
	 * messages and can verify the validity of checksum for
	 * incoming messages.  Setting this flag implies that the
	 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
	 */
	IB_DEVICE_UD_IP_CSUM		= (1<<18),
	IB_DEVICE_UD_TSO		= (1<<19),
	IB_DEVICE_XRC			= (1<<20),
	IB_DEVICE_MEM_MGT_EXTENSIONS	= (1<<21),
	IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
};

enum ib_atomic_cap {
	IB_ATOMIC_NONE,
	IB_ATOMIC_HCA,
	IB_ATOMIC_GLOB
};

struct ib_device_attr {
	u64			fw_ver;
	__be64			sys_image_guid;
	u64			max_mr_size;
	u64			page_size_cap;
	u32			vendor_id;
	u32			vendor_part_id;
	u32			hw_ver;
	int			max_qp;
	int			max_qp_wr;
	int			device_cap_flags;
	int			max_sge;
	int			max_sge_rd;
	int			max_cq;
	int			max_cqe;
	int			max_mr;
	int			max_pd;
	int			max_qp_rd_atom;
	int			max_ee_rd_atom;
	int			max_res_rd_atom;
	int			max_qp_init_rd_atom;
	int			max_ee_init_rd_atom;
	enum ib_atomic_cap	atomic_cap;
	enum ib_atomic_cap	masked_atomic_cap;
	int			max_ee;
	int			max_rdd;
	int			max_mw;
	int			max_raw_ipv6_qp;
	int			max_raw_ethy_qp;
	int			max_mcast_grp;
	int			max_mcast_qp_attach;
	int			max_total_mcast_qp_attach;
	int			max_ah;
	int			max_fmr;
	int			max_map_per_fmr;
	int			max_srq;
	int			max_srq_wr;
	int			max_srq_sge;
	unsigned int		max_fast_reg_page_list_len;
	u16			max_pkeys;
	u8			local_ca_ack_delay;
};

enum ib_mtu {
	IB_MTU_256  = 1,
	IB_MTU_512  = 2,
	IB_MTU_1024 = 3,
	IB_MTU_2048 = 4,
	IB_MTU_4096 = 5
};

static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
{
	switch (mtu) {
	case IB_MTU_256:  return  256;
	case IB_MTU_512:  return  512;
	case IB_MTU_1024: return 1024;
	case IB_MTU_2048: return 2048;
	case IB_MTU_4096: return 4096;
	default: 	  return -1;
	}
}

enum ib_port_state {
	IB_PORT_NOP		= 0,
	IB_PORT_DOWN		= 1,
	IB_PORT_INIT		= 2,
	IB_PORT_ARMED		= 3,
	IB_PORT_ACTIVE		= 4,
	IB_PORT_ACTIVE_DEFER	= 5
};

enum ib_port_cap_flags {
	IB_PORT_SM				= 1 <<  1,
	IB_PORT_NOTICE_SUP			= 1 <<  2,
	IB_PORT_TRAP_SUP			= 1 <<  3,
	IB_PORT_OPT_IPD_SUP                     = 1 <<  4,
	IB_PORT_AUTO_MIGR_SUP			= 1 <<  5,
	IB_PORT_SL_MAP_SUP			= 1 <<  6,
	IB_PORT_MKEY_NVRAM			= 1 <<  7,
	IB_PORT_PKEY_NVRAM			= 1 <<  8,
	IB_PORT_LED_INFO_SUP			= 1 <<  9,
	IB_PORT_SM_DISABLED			= 1 << 10,
	IB_PORT_SYS_IMAGE_GUID_SUP		= 1 << 11,
	IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP	= 1 << 12,
	IB_PORT_EXTENDED_SPEEDS_SUP             = 1 << 14,
	IB_PORT_CM_SUP				= 1 << 16,
	IB_PORT_SNMP_TUNNEL_SUP			= 1 << 17,
	IB_PORT_REINIT_SUP			= 1 << 18,
	IB_PORT_DEVICE_MGMT_SUP			= 1 << 19,
	IB_PORT_VENDOR_CLASS_SUP		= 1 << 20,
	IB_PORT_DR_NOTICE_SUP			= 1 << 21,
	IB_PORT_CAP_MASK_NOTICE_SUP		= 1 << 22,
	IB_PORT_BOOT_MGMT_SUP			= 1 << 23,
	IB_PORT_LINK_LATENCY_SUP		= 1 << 24,
	IB_PORT_CLIENT_REG_SUP			= 1 << 25
};

enum ib_port_width {
	IB_WIDTH_1X	= 1,
	IB_WIDTH_4X	= 2,
	IB_WIDTH_8X	= 4,
	IB_WIDTH_12X	= 8
};

static inline int ib_width_enum_to_int(enum ib_port_width width)
{
	switch (width) {
	case IB_WIDTH_1X:  return  1;
	case IB_WIDTH_4X:  return  4;
	case IB_WIDTH_8X:  return  8;
	case IB_WIDTH_12X: return 12;
	default: 	  return -1;
	}
}

struct ib_protocol_stats {
	/* TBD... */
};

struct iw_protocol_stats {
	u64	ipInReceives;
	u64	ipInHdrErrors;
	u64	ipInTooBigErrors;
	u64	ipInNoRoutes;
	u64	ipInAddrErrors;
	u64	ipInUnknownProtos;
	u64	ipInTruncatedPkts;
	u64	ipInDiscards;
	u64	ipInDelivers;
	u64	ipOutForwDatagrams;
	u64	ipOutRequests;
	u64	ipOutDiscards;
	u64	ipOutNoRoutes;
	u64	ipReasmTimeout;
	u64	ipReasmReqds;
	u64	ipReasmOKs;
	u64	ipReasmFails;
	u64	ipFragOKs;
	u64	ipFragFails;
	u64	ipFragCreates;
	u64	ipInMcastPkts;
	u64	ipOutMcastPkts;
	u64	ipInBcastPkts;
	u64	ipOutBcastPkts;

	u64	tcpRtoAlgorithm;
	u64	tcpRtoMin;
	u64	tcpRtoMax;
	u64	tcpMaxConn;
	u64	tcpActiveOpens;
	u64	tcpPassiveOpens;
	u64	tcpAttemptFails;
	u64	tcpEstabResets;
	u64	tcpCurrEstab;
	u64	tcpInSegs;
	u64	tcpOutSegs;
	u64	tcpRetransSegs;
	u64	tcpInErrs;
	u64	tcpOutRsts;
};

union rdma_protocol_stats {
	struct ib_protocol_stats	ib;
	struct iw_protocol_stats	iw;
};

struct ib_port_attr {
	enum ib_port_state	state;
	enum ib_mtu		max_mtu;
	enum ib_mtu		active_mtu;
	int			gid_tbl_len;
	u32			port_cap_flags;
	u32			max_msg_sz;
	u32			bad_pkey_cntr;
	u32			qkey_viol_cntr;
	u16			pkey_tbl_len;
	u16			lid;
	u16			sm_lid;
	u8			lmc;
	u8			max_vl_num;
	u8			sm_sl;
	u8			subnet_timeout;
	u8			init_type_reply;
	u8			active_width;
	u8			active_speed;
	u8                      phys_state;
};

enum ib_device_modify_flags {
	IB_DEVICE_MODIFY_SYS_IMAGE_GUID	= 1 << 0,
	IB_DEVICE_MODIFY_NODE_DESC	= 1 << 1
};

struct ib_device_modify {
	u64	sys_image_guid;
	char	node_desc[64];
};

enum ib_port_modify_flags {
	IB_PORT_SHUTDOWN		= 1,
	IB_PORT_INIT_TYPE		= (1<<2),
	IB_PORT_RESET_QKEY_CNTR		= (1<<3)
};

struct ib_port_modify {
	u32	set_port_cap_mask;
	u32	clr_port_cap_mask;
	u8	init_type;
};

enum ib_event_type {
	IB_EVENT_CQ_ERR,
	IB_EVENT_QP_FATAL,
	IB_EVENT_QP_REQ_ERR,
	IB_EVENT_QP_ACCESS_ERR,
	IB_EVENT_COMM_EST,
	IB_EVENT_SQ_DRAINED,
	IB_EVENT_PATH_MIG,
	IB_EVENT_PATH_MIG_ERR,
	IB_EVENT_DEVICE_FATAL,
	IB_EVENT_PORT_ACTIVE,
	IB_EVENT_PORT_ERR,
	IB_EVENT_LID_CHANGE,
	IB_EVENT_PKEY_CHANGE,
	IB_EVENT_SM_CHANGE,
	IB_EVENT_SRQ_ERR,
	IB_EVENT_SRQ_LIMIT_REACHED,
	IB_EVENT_QP_LAST_WQE_REACHED,
	IB_EVENT_CLIENT_REREGISTER,
	IB_EVENT_GID_CHANGE,
};

struct ib_event {
	struct ib_device	*device;
	union {
		struct ib_cq	*cq;
		struct ib_qp	*qp;
		struct ib_srq	*srq;
		u8		port_num;
	} element;
	enum ib_event_type	event;
};

struct ib_event_handler {
	struct ib_device *device;
	void            (*handler)(struct ib_event_handler *, struct ib_event *);
	struct list_head  list;
};

#define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler)		\
	do {							\
		(_ptr)->device  = _device;			\
		(_ptr)->handler = _handler;			\
		INIT_LIST_HEAD(&(_ptr)->list);			\
	} while (0)

struct ib_global_route {
	union ib_gid	dgid;
	u32		flow_label;
	u8		sgid_index;
	u8		hop_limit;
	u8		traffic_class;
};

struct ib_grh {
	__be32		version_tclass_flow;
	__be16		paylen;
	u8		next_hdr;
	u8		hop_limit;
	union ib_gid	sgid;
	union ib_gid	dgid;
};

enum {
	IB_MULTICAST_QPN = 0xffffff
};

#define IB_LID_PERMISSIVE	cpu_to_be16(0xFFFF)

enum ib_ah_flags {
	IB_AH_GRH	= 1
};

enum ib_rate {
	IB_RATE_PORT_CURRENT = 0,
	IB_RATE_2_5_GBPS = 2,
	IB_RATE_5_GBPS   = 5,
	IB_RATE_10_GBPS  = 3,
	IB_RATE_20_GBPS  = 6,
	IB_RATE_30_GBPS  = 4,
	IB_RATE_40_GBPS  = 7,
	IB_RATE_60_GBPS  = 8,
	IB_RATE_80_GBPS  = 9,
	IB_RATE_120_GBPS = 10,
	IB_RATE_14_GBPS  = 11,
	IB_RATE_56_GBPS  = 12,
	IB_RATE_112_GBPS = 13,
	IB_RATE_168_GBPS = 14,
	IB_RATE_25_GBPS  = 15,
	IB_RATE_100_GBPS = 16,
	IB_RATE_200_GBPS = 17,
	IB_RATE_300_GBPS = 18
};

/**
 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
 * base rate of 2.5 Gbit/sec.  For example, IB_RATE_5_GBPS will be
 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
 * @rate: rate to convert.
 */
int ib_rate_to_mult(enum ib_rate rate) __attribute_const__;

/**
 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
 * @rate: rate to convert.
 */
int ib_rate_to_mbps(enum ib_rate rate) __attribute_const__;

/**
 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
 * enum.
 * @mult: multiple to convert.
 */
enum ib_rate mult_to_ib_rate(int mult) __attribute_const__;

struct ib_ah_attr {
	struct ib_global_route	grh;
	u16			dlid;
	u8			sl;
	u8			src_path_bits;
	u8			static_rate;
	u8			ah_flags;
	u8			port_num;
};

enum ib_wc_status {
	IB_WC_SUCCESS,
	IB_WC_LOC_LEN_ERR,
	IB_WC_LOC_QP_OP_ERR,
	IB_WC_LOC_EEC_OP_ERR,
	IB_WC_LOC_PROT_ERR,
	IB_WC_WR_FLUSH_ERR,
	IB_WC_MW_BIND_ERR,
	IB_WC_BAD_RESP_ERR,
	IB_WC_LOC_ACCESS_ERR,
	IB_WC_REM_INV_REQ_ERR,
	IB_WC_REM_ACCESS_ERR,
	IB_WC_REM_OP_ERR,
	IB_WC_RETRY_EXC_ERR,
	IB_WC_RNR_RETRY_EXC_ERR,
	IB_WC_LOC_RDD_VIOL_ERR,
	IB_WC_REM_INV_RD_REQ_ERR,
	IB_WC_REM_ABORT_ERR,
	IB_WC_INV_EECN_ERR,
	IB_WC_INV_EEC_STATE_ERR,
	IB_WC_FATAL_ERR,
	IB_WC_RESP_TIMEOUT_ERR,
	IB_WC_GENERAL_ERR
};

enum ib_wc_opcode {
	IB_WC_SEND,
	IB_WC_RDMA_WRITE,
	IB_WC_RDMA_READ,
	IB_WC_COMP_SWAP,
	IB_WC_FETCH_ADD,
	IB_WC_BIND_MW,
	IB_WC_LSO,
	IB_WC_LOCAL_INV,
	IB_WC_FAST_REG_MR,
	IB_WC_MASKED_COMP_SWAP,
	IB_WC_MASKED_FETCH_ADD,
/*
 * Set value of IB_WC_RECV so consumers can test if a completion is a
 * receive by testing (opcode & IB_WC_RECV).
 */
	IB_WC_RECV			= 1 << 7,
	IB_WC_RECV_RDMA_WITH_IMM
};

enum ib_wc_flags {
	IB_WC_GRH		= 1,
	IB_WC_WITH_IMM		= (1<<1),
	IB_WC_WITH_INVALIDATE	= (1<<2),
};

struct ib_wc {
	u64			wr_id;
	enum ib_wc_status	status;
	enum ib_wc_opcode	opcode;
	u32			vendor_err;
	u32			byte_len;
	struct ib_qp	       *qp;
	union {
		__be32		imm_data;
		u32		invalidate_rkey;
	} ex;
	u32			src_qp;
	int			wc_flags;
	u16			pkey_index;
	u16			slid;
	u8			sl;
	u8			dlid_path_bits;
	u8			port_num;	/* valid only for DR SMPs on switches */
	int			csum_ok;
};

enum ib_cq_notify_flags {
	IB_CQ_SOLICITED			= 1 << 0,
	IB_CQ_NEXT_COMP			= 1 << 1,
	IB_CQ_SOLICITED_MASK		= IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
	IB_CQ_REPORT_MISSED_EVENTS	= 1 << 2,
};

enum ib_srq_type {
	IB_SRQT_BASIC,
	IB_SRQT_XRC
};

enum ib_srq_attr_mask {
	IB_SRQ_MAX_WR	= 1 << 0,
	IB_SRQ_LIMIT	= 1 << 1,
};

struct ib_srq_attr {
	u32	max_wr;
	u32	max_sge;
	u32	srq_limit;
};

struct ib_srq_init_attr {
	void		      (*event_handler)(struct ib_event *, void *);
	void		       *srq_context;
	struct ib_srq_attr	attr;
	enum ib_srq_type	srq_type;

	union {
		struct {
			struct ib_xrcd *xrcd;
			struct ib_cq   *cq;
		} xrc;
	} ext;
};

struct ib_qp_cap {
	u32	max_send_wr;
	u32	max_recv_wr;
	u32	max_send_sge;
	u32	max_recv_sge;
	u32	max_inline_data;
};

enum ib_sig_type {
	IB_SIGNAL_ALL_WR,
	IB_SIGNAL_REQ_WR
};

enum ib_qp_type {
	/*
	 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
	 * here (and in that order) since the MAD layer uses them as
	 * indices into a 2-entry table.
	 */
	IB_QPT_SMI,
	IB_QPT_GSI,

	IB_QPT_RC,
	IB_QPT_UC,
	IB_QPT_UD,
	IB_QPT_RAW_IPV6,
	IB_QPT_RAW_ETHERTYPE,
	/* Save 8 for RAW_PACKET */
	IB_QPT_XRC_INI = 9,
	IB_QPT_XRC_TGT,
	IB_QPT_MAX
};

enum ib_qp_create_flags {
	IB_QP_CREATE_IPOIB_UD_LSO		= 1 << 0,
	IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK	= 1 << 1,
};

struct ib_qp_init_attr {
	void                  (*event_handler)(struct ib_event *, void *);
	void		       *qp_context;
	struct ib_cq	       *send_cq;
	struct ib_cq	       *recv_cq;
	struct ib_srq	       *srq;
	struct ib_xrcd	       *xrcd;     /* XRC TGT QPs only */
	struct ib_qp_cap	cap;
	enum ib_sig_type	sq_sig_type;
	enum ib_qp_type		qp_type;
	enum ib_qp_create_flags	create_flags;
	u8			port_num; /* special QP types only */
};

struct ib_qp_open_attr {
	void                  (*event_handler)(struct ib_event *, void *);
	void		       *qp_context;
	u32			qp_num;
	enum ib_qp_type		qp_type;
};

enum ib_rnr_timeout {
	IB_RNR_TIMER_655_36 =  0,
	IB_RNR_TIMER_000_01 =  1,
	IB_RNR_TIMER_000_02 =  2,
	IB_RNR_TIMER_000_03 =  3,
	IB_RNR_TIMER_000_04 =  4,
	IB_RNR_TIMER_000_06 =  5,
	IB_RNR_TIMER_000_08 =  6,
	IB_RNR_TIMER_000_12 =  7,
	IB_RNR_TIMER_000_16 =  8,
	IB_RNR_TIMER_000_24 =  9,
	IB_RNR_TIMER_000_32 = 10,
	IB_RNR_TIMER_000_48 = 11,
	IB_RNR_TIMER_000_64 = 12,
	IB_RNR_TIMER_000_96 = 13,
	IB_RNR_TIMER_001_28 = 14,
	IB_RNR_TIMER_001_92 = 15,
	IB_RNR_TIMER_002_56 = 16,
	IB_RNR_TIMER_003_84 = 17,
	IB_RNR_TIMER_005_12 = 18,
	IB_RNR_TIMER_007_68 = 19,
	IB_RNR_TIMER_010_24 = 20,
	IB_RNR_TIMER_015_36 = 21,
	IB_RNR_TIMER_020_48 = 22,
	IB_RNR_TIMER_030_72 = 23,
	IB_RNR_TIMER_040_96 = 24,
	IB_RNR_TIMER_061_44 = 25,
	IB_RNR_TIMER_081_92 = 26,
	IB_RNR_TIMER_122_88 = 27,
	IB_RNR_TIMER_163_84 = 28,
	IB_RNR_TIMER_245_76 = 29,
	IB_RNR_TIMER_327_68 = 30,
	IB_RNR_TIMER_491_52 = 31
};

enum ib_qp_attr_mask {
	IB_QP_STATE			= 1,
	IB_QP_CUR_STATE			= (1<<1),
	IB_QP_EN_SQD_ASYNC_NOTIFY	= (1<<2),
	IB_QP_ACCESS_FLAGS		= (1<<3),
	IB_QP_PKEY_INDEX		= (1<<4),
	IB_QP_PORT			= (1<<5),
	IB_QP_QKEY			= (1<<6),
	IB_QP_AV			= (1<<7),
	IB_QP_PATH_MTU			= (1<<8),
	IB_QP_TIMEOUT			= (1<<9),
	IB_QP_RETRY_CNT			= (1<<10),
	IB_QP_RNR_RETRY			= (1<<11),
	IB_QP_RQ_PSN			= (1<<12),
	IB_QP_MAX_QP_RD_ATOMIC		= (1<<13),
	IB_QP_ALT_PATH			= (1<<14),
	IB_QP_MIN_RNR_TIMER		= (1<<15),
	IB_QP_SQ_PSN			= (1<<16),
	IB_QP_MAX_DEST_RD_ATOMIC	= (1<<17),
	IB_QP_PATH_MIG_STATE		= (1<<18),
	IB_QP_CAP			= (1<<19),
	IB_QP_DEST_QPN			= (1<<20)
};

enum ib_qp_state {
	IB_QPS_RESET,
	IB_QPS_INIT,
	IB_QPS_RTR,
	IB_QPS_RTS,
	IB_QPS_SQD,
	IB_QPS_SQE,
	IB_QPS_ERR
};

enum ib_mig_state {
	IB_MIG_MIGRATED,
	IB_MIG_REARM,
	IB_MIG_ARMED
};

struct ib_qp_attr {
	enum ib_qp_state	qp_state;
	enum ib_qp_state	cur_qp_state;
	enum ib_mtu		path_mtu;
	enum ib_mig_state	path_mig_state;
	u32			qkey;
	u32			rq_psn;
	u32			sq_psn;
	u32			dest_qp_num;
	int			qp_access_flags;
	struct ib_qp_cap	cap;
	struct ib_ah_attr	ah_attr;
	struct ib_ah_attr	alt_ah_attr;
	u16			pkey_index;
	u16			alt_pkey_index;
	u8			en_sqd_async_notify;
	u8			sq_draining;
	u8			max_rd_atomic;
	u8			max_dest_rd_atomic;
	u8			min_rnr_timer;
	u8			port_num;
	u8			timeout;
	u8			retry_cnt;
	u8			rnr_retry;
	u8			alt_port_num;
	u8			alt_timeout;
};

enum ib_wr_opcode {
	IB_WR_RDMA_WRITE,
	IB_WR_RDMA_WRITE_WITH_IMM,
	IB_WR_SEND,
	IB_WR_SEND_WITH_IMM,
	IB_WR_RDMA_READ,
	IB_WR_ATOMIC_CMP_AND_SWP,
	IB_WR_ATOMIC_FETCH_AND_ADD,
	IB_WR_LSO,
	IB_WR_SEND_WITH_INV,
	IB_WR_RDMA_READ_WITH_INV,
	IB_WR_LOCAL_INV,
	IB_WR_FAST_REG_MR,
	IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
	IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
};

enum ib_send_flags {
	IB_SEND_FENCE		= 1,
	IB_SEND_SIGNALED	= (1<<1),
	IB_SEND_SOLICITED	= (1<<2),
	IB_SEND_INLINE		= (1<<3),
	IB_SEND_IP_CSUM		= (1<<4)
};

struct ib_sge {
	u64	addr;
	u32	length;
	u32	lkey;
};

struct ib_fast_reg_page_list {
	struct ib_device       *device;
	u64		       *page_list;
	unsigned int		max_page_list_len;
};

struct ib_send_wr {
	struct ib_send_wr      *next;
	u64			wr_id;
	struct ib_sge	       *sg_list;
	int			num_sge;
	enum ib_wr_opcode	opcode;
	int			send_flags;
	union {
		__be32		imm_data;
		u32		invalidate_rkey;
	} ex;
	union {
		struct {
			u64	remote_addr;
			u32	rkey;
		} rdma;
		struct {
			u64	remote_addr;
			u64	compare_add;
			u64	swap;
			u64	compare_add_mask;
			u64	swap_mask;
			u32	rkey;
		} atomic;
		struct {
			struct ib_ah *ah;
			void   *header;
			int     hlen;
			int     mss;
			u32	remote_qpn;
			u32	remote_qkey;
			u16	pkey_index; /* valid for GSI only */
			u8	port_num;   /* valid for DR SMPs on switch only */
		} ud;
		struct {
			u64				iova_start;
			struct ib_fast_reg_page_list   *page_list;
			unsigned int			page_shift;
			unsigned int			page_list_len;
			u32				length;
			int				access_flags;
			u32				rkey;
		} fast_reg;
	} wr;
	u32			xrc_remote_srq_num;	/* XRC TGT QPs only */
};

struct ib_recv_wr {
	struct ib_recv_wr      *next;
	u64			wr_id;
	struct ib_sge	       *sg_list;
	int			num_sge;
};

enum ib_access_flags {
	IB_ACCESS_LOCAL_WRITE	= 1,
	IB_ACCESS_REMOTE_WRITE	= (1<<1),
	IB_ACCESS_REMOTE_READ	= (1<<2),
	IB_ACCESS_REMOTE_ATOMIC	= (1<<3),
	IB_ACCESS_MW_BIND	= (1<<4)
};

struct ib_phys_buf {
	u64      addr;
	u64      size;
};

struct ib_mr_attr {
	struct ib_pd	*pd;
	u64		device_virt_addr;
	u64		size;
	int		mr_access_flags;
	u32		lkey;
	u32		rkey;
};

enum ib_mr_rereg_flags {
	IB_MR_REREG_TRANS	= 1,
	IB_MR_REREG_PD		= (1<<1),
	IB_MR_REREG_ACCESS	= (1<<2)
};

struct ib_mw_bind {
	struct ib_mr   *mr;
	u64		wr_id;
	u64		addr;
	u32		length;
	int		send_flags;
	int		mw_access_flags;
};

struct ib_fmr_attr {
	int	max_pages;
	int	max_maps;
	u8	page_shift;
};

struct ib_ucontext {
	struct ib_device       *device;
	struct list_head	pd_list;
	struct list_head	mr_list;
	struct list_head	mw_list;
	struct list_head	cq_list;
	struct list_head	qp_list;
	struct list_head	srq_list;
	struct list_head	ah_list;
	struct list_head	xrcd_list;
	int			closing;
};

struct ib_uobject {
	u64			user_handle;	/* handle given to us by userspace */
	struct ib_ucontext     *context;	/* associated user context */
	void		       *object;		/* containing object */
	struct list_head	list;		/* link to context's list */
	int			id;		/* index into kernel idr */
	struct kref		ref;
	struct rw_semaphore	mutex;		/* protects .live */
	int			live;
};

struct ib_udata {
	void __user *inbuf;
	void __user *outbuf;
	size_t       inlen;
	size_t       outlen;
};

struct ib_pd {
	struct ib_device       *device;
	struct ib_uobject      *uobject;
	atomic_t          	usecnt; /* count all resources */
};

struct ib_xrcd {
	struct ib_device       *device;
	atomic_t		usecnt; /* count all exposed resources */
	struct inode	       *inode;

	struct mutex		tgt_qp_mutex;
	struct list_head	tgt_qp_list;
};

struct ib_ah {
	struct ib_device	*device;
	struct ib_pd		*pd;
	struct ib_uobject	*uobject;
};

typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);

struct ib_cq {
	struct ib_device       *device;
	struct ib_uobject      *uobject;
	ib_comp_handler   	comp_handler;
	void                  (*event_handler)(struct ib_event *, void *);
	void                   *cq_context;
	int               	cqe;
	atomic_t          	usecnt; /* count number of work queues */
};

struct ib_srq {
	struct ib_device       *device;
	struct ib_pd	       *pd;
	struct ib_uobject      *uobject;
	void		      (*event_handler)(struct ib_event *, void *);
	void		       *srq_context;
	enum ib_srq_type	srq_type;
	atomic_t		usecnt;

	union {
		struct {
			struct ib_xrcd *xrcd;
			struct ib_cq   *cq;
			u32		srq_num;
		} xrc;
	} ext;
};

struct ib_qp {
	struct ib_device       *device;
	struct ib_pd	       *pd;
	struct ib_cq	       *send_cq;
	struct ib_cq	       *recv_cq;
	struct ib_srq	       *srq;
	struct ib_xrcd	       *xrcd; /* XRC TGT QPs only */
	struct list_head	xrcd_list;
	atomic_t		usecnt; /* count times opened */
	struct list_head	open_list;
	struct ib_qp           *real_qp;
	struct ib_uobject      *uobject;
	void                  (*event_handler)(struct ib_event *, void *);
	void		       *qp_context;
	u32			qp_num;
	enum ib_qp_type		qp_type;
};

struct ib_mr {
	struct ib_device  *device;
	struct ib_pd	  *pd;
	struct ib_uobject *uobject;
	u32		   lkey;
	u32		   rkey;
	atomic_t	   usecnt; /* count number of MWs */
};

struct ib_mw {
	struct ib_device	*device;
	struct ib_pd		*pd;
	struct ib_uobject	*uobject;
	u32			rkey;
};

struct ib_fmr {
	struct ib_device	*device;
	struct ib_pd		*pd;
	struct list_head	list;
	u32			lkey;
	u32			rkey;
};

struct ib_mad;
struct ib_grh;

enum ib_process_mad_flags {
	IB_MAD_IGNORE_MKEY	= 1,
	IB_MAD_IGNORE_BKEY	= 2,
	IB_MAD_IGNORE_ALL	= IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
};

enum ib_mad_result {
	IB_MAD_RESULT_FAILURE  = 0,      /* (!SUCCESS is the important flag) */
	IB_MAD_RESULT_SUCCESS  = 1 << 0, /* MAD was successfully processed   */
	IB_MAD_RESULT_REPLY    = 1 << 1, /* Reply packet needs to be sent    */
	IB_MAD_RESULT_CONSUMED = 1 << 2  /* Packet consumed: stop processing */
};

#define IB_DEVICE_NAME_MAX 64

struct ib_cache {
	rwlock_t                lock;
	struct ib_event_handler event_handler;
	struct ib_pkey_cache  **pkey_cache;
	struct ib_gid_cache   **gid_cache;
	u8                     *lmc_cache;
};

struct ib_dma_mapping_ops {
	int		(*mapping_error)(struct ib_device *dev,
					 u64 dma_addr);
	u64		(*map_single)(struct ib_device *dev,
				      void *ptr, size_t size,
				      enum dma_data_direction direction);
	void		(*unmap_single)(struct ib_device *dev,
					u64 addr, size_t size,
					enum dma_data_direction direction);
	u64		(*map_page)(struct ib_device *dev,
				    struct page *page, unsigned long offset,
				    size_t size,
				    enum dma_data_direction direction);
	void		(*unmap_page)(struct ib_device *dev,
				      u64 addr, size_t size,
				      enum dma_data_direction direction);
	int		(*map_sg)(struct ib_device *dev,
				  struct scatterlist *sg, int nents,
				  enum dma_data_direction direction);
	void		(*unmap_sg)(struct ib_device *dev,
				    struct scatterlist *sg, int nents,
				    enum dma_data_direction direction);
	u64		(*dma_address)(struct ib_device *dev,
				       struct scatterlist *sg);
	unsigned int	(*dma_len)(struct ib_device *dev,
				   struct scatterlist *sg);
	void		(*sync_single_for_cpu)(struct ib_device *dev,
					       u64 dma_handle,
					       size_t size,
					       enum dma_data_direction dir);
	void		(*sync_single_for_device)(struct ib_device *dev,
						  u64 dma_handle,
						  size_t size,
						  enum dma_data_direction dir);
	void		*(*alloc_coherent)(struct ib_device *dev,
					   size_t size,
					   u64 *dma_handle,
					   gfp_t flag);
	void		(*free_coherent)(struct ib_device *dev,
					 size_t size, void *cpu_addr,
					 u64 dma_handle);
};

struct iw_cm_verbs;

struct ib_device {
	struct device                *dma_device;

	char                          name[IB_DEVICE_NAME_MAX];

	struct list_head              event_handler_list;
	spinlock_t                    event_handler_lock;

	spinlock_t                    client_data_lock;
	struct list_head              core_list;
	struct list_head              client_data_list;

	struct ib_cache               cache;
	int                          *pkey_tbl_len;
	int                          *gid_tbl_len;

	int			      num_comp_vectors;

	struct iw_cm_verbs	     *iwcm;

	int		           (*get_protocol_stats)(struct ib_device *device,
							 union rdma_protocol_stats *stats);
	int		           (*query_device)(struct ib_device *device,
						   struct ib_device_attr *device_attr);
	int		           (*query_port)(struct ib_device *device,
						 u8 port_num,
						 struct ib_port_attr *port_attr);
	enum rdma_link_layer	   (*get_link_layer)(struct ib_device *device,
						     u8 port_num);
	int		           (*query_gid)(struct ib_device *device,
						u8 port_num, int index,
						union ib_gid *gid);
	int		           (*query_pkey)(struct ib_device *device,
						 u8 port_num, u16 index, u16 *pkey);
	int		           (*modify_device)(struct ib_device *device,
						    int device_modify_mask,
						    struct ib_device_modify *device_modify);
	int		           (*modify_port)(struct ib_device *device,
						  u8 port_num, int port_modify_mask,
						  struct ib_port_modify *port_modify);
	struct ib_ucontext *       (*alloc_ucontext)(struct ib_device *device,
						     struct ib_udata *udata);
	int                        (*dealloc_ucontext)(struct ib_ucontext *context);
	int                        (*mmap)(struct ib_ucontext *context,
					   struct vm_area_struct *vma);
	struct ib_pd *             (*alloc_pd)(struct ib_device *device,
					       struct ib_ucontext *context,
					       struct ib_udata *udata);
	int                        (*dealloc_pd)(struct ib_pd *pd);
	struct ib_ah *             (*create_ah)(struct ib_pd *pd,
						struct ib_ah_attr *ah_attr);
	int                        (*modify_ah)(struct ib_ah *ah,
						struct ib_ah_attr *ah_attr);
	int                        (*query_ah)(struct ib_ah *ah,
					       struct ib_ah_attr *ah_attr);
	int                        (*destroy_ah)(struct ib_ah *ah);
	struct ib_srq *            (*create_srq)(struct ib_pd *pd,
						 struct ib_srq_init_attr *srq_init_attr,
						 struct ib_udata *udata);
	int                        (*modify_srq)(struct ib_srq *srq,
						 struct ib_srq_attr *srq_attr,
						 enum ib_srq_attr_mask srq_attr_mask,
						 struct ib_udata *udata);
	int                        (*query_srq)(struct ib_srq *srq,
						struct ib_srq_attr *srq_attr);
	int                        (*destroy_srq)(struct ib_srq *srq);
	int                        (*post_srq_recv)(struct ib_srq *srq,
						    struct ib_recv_wr *recv_wr,
						    struct ib_recv_wr **bad_recv_wr);
	struct ib_qp *             (*create_qp)(struct ib_pd *pd,
						struct ib_qp_init_attr *qp_init_attr,
						struct ib_udata *udata);
	int                        (*modify_qp)(struct ib_qp *qp,
						struct ib_qp_attr *qp_attr,
						int qp_attr_mask,
						struct ib_udata *udata);
	int                        (*query_qp)(struct ib_qp *qp,
					       struct ib_qp_attr *qp_attr,
					       int qp_attr_mask,
					       struct ib_qp_init_attr *qp_init_attr);
	int                        (*destroy_qp)(struct ib_qp *qp);
	int                        (*post_send)(struct ib_qp *qp,
						struct ib_send_wr *send_wr,
						struct ib_send_wr **bad_send_wr);
	int                        (*post_recv)(struct ib_qp *qp,
						struct ib_recv_wr *recv_wr,
						struct ib_recv_wr **bad_recv_wr);
	struct ib_cq *             (*create_cq)(struct ib_device *device, int cqe,
						int comp_vector,
						struct ib_ucontext *context,
						struct ib_udata *udata);
	int                        (*modify_cq)(struct ib_cq *cq, u16 cq_count,
						u16 cq_period);
	int                        (*destroy_cq)(struct ib_cq *cq);
	int                        (*resize_cq)(struct ib_cq *cq, int cqe,
						struct ib_udata *udata);
	int                        (*poll_cq)(struct ib_cq *cq, int num_entries,
					      struct ib_wc *wc);
	int                        (*peek_cq)(struct ib_cq *cq, int wc_cnt);
	int                        (*req_notify_cq)(struct ib_cq *cq,
						    enum ib_cq_notify_flags flags);
	int                        (*req_ncomp_notif)(struct ib_cq *cq,
						      int wc_cnt);
	struct ib_mr *             (*get_dma_mr)(struct ib_pd *pd,
						 int mr_access_flags);
	struct ib_mr *             (*reg_phys_mr)(struct ib_pd *pd,
						  struct ib_phys_buf *phys_buf_array,
						  int num_phys_buf,
						  int mr_access_flags,
						  u64 *iova_start);
	struct ib_mr *             (*reg_user_mr)(struct ib_pd *pd,
						  u64 start, u64 length,
						  u64 virt_addr,
						  int mr_access_flags,
						  struct ib_udata *udata);
	int                        (*query_mr)(struct ib_mr *mr,
					       struct ib_mr_attr *mr_attr);
	int                        (*dereg_mr)(struct ib_mr *mr);
	struct ib_mr *		   (*alloc_fast_reg_mr)(struct ib_pd *pd,
					       int max_page_list_len);
	struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
								   int page_list_len);
	void			   (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
	int                        (*rereg_phys_mr)(struct ib_mr *mr,
						    int mr_rereg_mask,
						    struct ib_pd *pd,
						    struct ib_phys_buf *phys_buf_array,
						    int num_phys_buf,
						    int mr_access_flags,
						    u64 *iova_start);
	struct ib_mw *             (*alloc_mw)(struct ib_pd *pd);
	int                        (*bind_mw)(struct ib_qp *qp,
					      struct ib_mw *mw,
					      struct ib_mw_bind *mw_bind);
	int                        (*dealloc_mw)(struct ib_mw *mw);
	struct ib_fmr *	           (*alloc_fmr)(struct ib_pd *pd,
						int mr_access_flags,
						struct ib_fmr_attr *fmr_attr);
	int		           (*map_phys_fmr)(struct ib_fmr *fmr,
						   u64 *page_list, int list_len,
						   u64 iova);
	int		           (*unmap_fmr)(struct list_head *fmr_list);
	int		           (*dealloc_fmr)(struct ib_fmr *fmr);
	int                        (*attach_mcast)(struct ib_qp *qp,
						   union ib_gid *gid,
						   u16 lid);
	int                        (*detach_mcast)(struct ib_qp *qp,
						   union ib_gid *gid,
						   u16 lid);
	int                        (*process_mad)(struct ib_device *device,
						  int process_mad_flags,
						  u8 port_num,
						  struct ib_wc *in_wc,
						  struct ib_grh *in_grh,
						  struct ib_mad *in_mad,
						  struct ib_mad *out_mad);
	struct ib_xrcd *	   (*alloc_xrcd)(struct ib_device *device,
						 struct ib_ucontext *ucontext,
						 struct ib_udata *udata);
	int			   (*dealloc_xrcd)(struct ib_xrcd *xrcd);

	struct ib_dma_mapping_ops   *dma_ops;

	struct module               *owner;
	struct device                dev;
	struct kobject               *ports_parent;
	struct list_head             port_list;

	enum {
		IB_DEV_UNINITIALIZED,
		IB_DEV_REGISTERED,
		IB_DEV_UNREGISTERED
	}                            reg_state;

	int			     uverbs_abi_ver;
	u64			     uverbs_cmd_mask;

	char			     node_desc[64];
	__be64			     node_guid;
	u32			     local_dma_lkey;
	u8                           node_type;
	u8                           phys_port_cnt;
};

struct ib_client {
	char  *name;
	void (*add)   (struct ib_device *);
	void (*remove)(struct ib_device *);

	struct list_head list;
};

struct ib_device *ib_alloc_device(size_t size);
void ib_dealloc_device(struct ib_device *device);

int ib_register_device(struct ib_device *device,
		       int (*port_callback)(struct ib_device *,
					    u8, struct kobject *));
void ib_unregister_device(struct ib_device *device);

int ib_register_client   (struct ib_client *client);
void ib_unregister_client(struct ib_client *client);

void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
void  ib_set_client_data(struct ib_device *device, struct ib_client *client,
			 void *data);

static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
{
	return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
}

static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
{
	return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
}

/**
 * ib_modify_qp_is_ok - Check that the supplied attribute mask
 * contains all required attributes and no attributes not allowed for
 * the given QP state transition.
 * @cur_state: Current QP state
 * @next_state: Next QP state
 * @type: QP type
 * @mask: Mask of supplied QP attributes
 *
 * This function is a helper function that a low-level driver's
 * modify_qp method can use to validate the consumer's input.  It
 * checks that cur_state and next_state are valid QP states, that a
 * transition from cur_state to next_state is allowed by the IB spec,
 * and that the attribute mask supplied is allowed for the transition.
 */
int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
		       enum ib_qp_type type, enum ib_qp_attr_mask mask);

int ib_register_event_handler  (struct ib_event_handler *event_handler);
int ib_unregister_event_handler(struct ib_event_handler *event_handler);
void ib_dispatch_event(struct ib_event *event);

int ib_query_device(struct ib_device *device,
		    struct ib_device_attr *device_attr);

int ib_query_port(struct ib_device *device,
		  u8 port_num, struct ib_port_attr *port_attr);

enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
					       u8 port_num);

int ib_query_gid(struct ib_device *device,
		 u8 port_num, int index, union ib_gid *gid);

int ib_query_pkey(struct ib_device *device,
		  u8 port_num, u16 index, u16 *pkey);

int ib_modify_device(struct ib_device *device,
		     int device_modify_mask,
		     struct ib_device_modify *device_modify);

int ib_modify_port(struct ib_device *device,
		   u8 port_num, int port_modify_mask,
		   struct ib_port_modify *port_modify);

int ib_find_gid(struct ib_device *device, union ib_gid *gid,
		u8 *port_num, u16 *index);

int ib_find_pkey(struct ib_device *device,
		 u8 port_num, u16 pkey, u16 *index);

/**
 * ib_alloc_pd - Allocates an unused protection domain.
 * @device: The device on which to allocate the protection domain.
 *
 * A protection domain object provides an association between QPs, shared
 * receive queues, address handles, memory regions, and memory windows.
 */
struct ib_pd *ib_alloc_pd(struct ib_device *device);

/**
 * ib_dealloc_pd - Deallocates a protection domain.
 * @pd: The protection domain to deallocate.
 */
int ib_dealloc_pd(struct ib_pd *pd);

/**
 * ib_create_ah - Creates an address handle for the given address vector.
 * @pd: The protection domain associated with the address handle.
 * @ah_attr: The attributes of the address vector.
 *
 * The address handle is used to reference a local or global destination
 * in all UD QP post sends.
 */
struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);

/**
 * ib_init_ah_from_wc - Initializes address handle attributes from a
 *   work completion.
 * @device: Device on which the received message arrived.
 * @port_num: Port on which the received message arrived.
 * @wc: Work completion associated with the received message.
 * @grh: References the received global route header.  This parameter is
 *   ignored unless the work completion indicates that the GRH is valid.
 * @ah_attr: Returned attributes that can be used when creating an address
 *   handle for replying to the message.
 */
int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
		       struct ib_grh *grh, struct ib_ah_attr *ah_attr);

/**
 * ib_create_ah_from_wc - Creates an address handle associated with the
 *   sender of the specified work completion.
 * @pd: The protection domain associated with the address handle.
 * @wc: Work completion information associated with a received message.
 * @grh: References the received global route header.  This parameter is
 *   ignored unless the work completion indicates that the GRH is valid.
 * @port_num: The outbound port number to associate with the address.
 *
 * The address handle is used to reference a local or global destination
 * in all UD QP post sends.
 */
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
				   struct ib_grh *grh, u8 port_num);

/**
 * ib_modify_ah - Modifies the address vector associated with an address
 *   handle.
 * @ah: The address handle to modify.
 * @ah_attr: The new address vector attributes to associate with the
 *   address handle.
 */
int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);

/**
 * ib_query_ah - Queries the address vector associated with an address
 *   handle.
 * @ah: The address handle to query.
 * @ah_attr: The address vector attributes associated with the address
 *   handle.
 */
int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);

/**
 * ib_destroy_ah - Destroys an address handle.
 * @ah: The address handle to destroy.
 */
int ib_destroy_ah(struct ib_ah *ah);

/**
 * ib_create_srq - Creates a SRQ associated with the specified protection
 *   domain.
 * @pd: The protection domain associated with the SRQ.
 * @srq_init_attr: A list of initial attributes required to create the
 *   SRQ.  If SRQ creation succeeds, then the attributes are updated to
 *   the actual capabilities of the created SRQ.
 *
 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
 * requested size of the SRQ, and set to the actual values allocated
 * on return.  If ib_create_srq() succeeds, then max_wr and max_sge
 * will always be at least as large as the requested values.
 */
struct ib_srq *ib_create_srq(struct ib_pd *pd,
			     struct ib_srq_init_attr *srq_init_attr);

/**
 * ib_modify_srq - Modifies the attributes for the specified SRQ.
 * @srq: The SRQ to modify.
 * @srq_attr: On input, specifies the SRQ attributes to modify.  On output,
 *   the current values of selected SRQ attributes are returned.
 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
 *   are being modified.
 *
 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
 * the number of receives queued drops below the limit.
 */
int ib_modify_srq(struct ib_srq *srq,
		  struct ib_srq_attr *srq_attr,
		  enum ib_srq_attr_mask srq_attr_mask);

/**
 * ib_query_srq - Returns the attribute list and current values for the
 *   specified SRQ.
 * @srq: The SRQ to query.
 * @srq_attr: The attributes of the specified SRQ.
 */
int ib_query_srq(struct ib_srq *srq,
		 struct ib_srq_attr *srq_attr);

/**
 * ib_destroy_srq - Destroys the specified SRQ.
 * @srq: The SRQ to destroy.
 */
int ib_destroy_srq(struct ib_srq *srq);

/**
 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
 * @srq: The SRQ to post the work request on.
 * @recv_wr: A list of work requests to post on the receive queue.
 * @bad_recv_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 */
static inline int ib_post_srq_recv(struct ib_srq *srq,
				   struct ib_recv_wr *recv_wr,
				   struct ib_recv_wr **bad_recv_wr)
{
	return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
}

/**
 * ib_create_qp - Creates a QP associated with the specified protection
 *   domain.
 * @pd: The protection domain associated with the QP.
 * @qp_init_attr: A list of initial attributes required to create the
 *   QP.  If QP creation succeeds, then the attributes are updated to
 *   the actual capabilities of the created QP.
 */
struct ib_qp *ib_create_qp(struct ib_pd *pd,
			   struct ib_qp_init_attr *qp_init_attr);

/**
 * ib_modify_qp - Modifies the attributes for the specified QP and then
 *   transitions the QP to the given state.
 * @qp: The QP to modify.
 * @qp_attr: On input, specifies the QP attributes to modify.  On output,
 *   the current values of selected QP attributes are returned.
 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
 *   are being modified.
 */
int ib_modify_qp(struct ib_qp *qp,
		 struct ib_qp_attr *qp_attr,
		 int qp_attr_mask);

/**
 * ib_query_qp - Returns the attribute list and current values for the
 *   specified QP.
 * @qp: The QP to query.
 * @qp_attr: The attributes of the specified QP.
 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
 * @qp_init_attr: Additional attributes of the selected QP.
 *
 * The qp_attr_mask may be used to limit the query to gathering only the
 * selected attributes.
 */
int ib_query_qp(struct ib_qp *qp,
		struct ib_qp_attr *qp_attr,
		int qp_attr_mask,
		struct ib_qp_init_attr *qp_init_attr);

/**
 * ib_destroy_qp - Destroys the specified QP.
 * @qp: The QP to destroy.
 */
int ib_destroy_qp(struct ib_qp *qp);

/**
 * ib_open_qp - Obtain a reference to an existing sharable QP.
 * @xrcd - XRC domain
 * @qp_open_attr: Attributes identifying the QP to open.
 *
 * Returns a reference to a sharable QP.
 */
struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
			 struct ib_qp_open_attr *qp_open_attr);

/**
 * ib_close_qp - Release an external reference to a QP.
 * @qp: The QP handle to release
 *
 * The opened QP handle is released by the caller.  The underlying
 * shared QP is not destroyed until all internal references are released.
 */
int ib_close_qp(struct ib_qp *qp);

/**
 * ib_post_send - Posts a list of work requests to the send queue of
 *   the specified QP.
 * @qp: The QP to post the work request on.
 * @send_wr: A list of work requests to post on the send queue.
 * @bad_send_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 *
 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
 * error is returned, the QP state shall not be affected,
 * ib_post_send() will return an immediate error after queueing any
 * earlier work requests in the list.
 */
static inline int ib_post_send(struct ib_qp *qp,
			       struct ib_send_wr *send_wr,
			       struct ib_send_wr **bad_send_wr)
{
	return qp->device->post_send(qp, send_wr, bad_send_wr);
}

/**
 * ib_post_recv - Posts a list of work requests to the receive queue of
 *   the specified QP.
 * @qp: The QP to post the work request on.
 * @recv_wr: A list of work requests to post on the receive queue.
 * @bad_recv_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 */
static inline int ib_post_recv(struct ib_qp *qp,
			       struct ib_recv_wr *recv_wr,
			       struct ib_recv_wr **bad_recv_wr)
{
	return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
}

/**
 * ib_create_cq - Creates a CQ on the specified device.
 * @device: The device on which to create the CQ.
 * @comp_handler: A user-specified callback that is invoked when a
 *   completion event occurs on the CQ.
 * @event_handler: A user-specified callback that is invoked when an
 *   asynchronous event not associated with a completion occurs on the CQ.
 * @cq_context: Context associated with the CQ returned to the user via
 *   the associated completion and event handlers.
 * @cqe: The minimum size of the CQ.
 * @comp_vector - Completion vector used to signal completion events.
 *     Must be >= 0 and < context->num_comp_vectors.
 *
 * Users can examine the cq structure to determine the actual CQ size.
 */
struct ib_cq *ib_create_cq(struct ib_device *device,
			   ib_comp_handler comp_handler,
			   void (*event_handler)(struct ib_event *, void *),
			   void *cq_context, int cqe, int comp_vector);

/**
 * ib_resize_cq - Modifies the capacity of the CQ.
 * @cq: The CQ to resize.
 * @cqe: The minimum size of the CQ.
 *
 * Users can examine the cq structure to determine the actual CQ size.
 */
int ib_resize_cq(struct ib_cq *cq, int cqe);

/**
 * ib_modify_cq - Modifies moderation params of the CQ
 * @cq: The CQ to modify.
 * @cq_count: number of CQEs that will trigger an event
 * @cq_period: max period of time in usec before triggering an event
 *
 */
int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);

/**
 * ib_destroy_cq - Destroys the specified CQ.
 * @cq: The CQ to destroy.
 */
int ib_destroy_cq(struct ib_cq *cq);

/**
 * ib_poll_cq - poll a CQ for completion(s)
 * @cq:the CQ being polled
 * @num_entries:maximum number of completions to return
 * @wc:array of at least @num_entries &struct ib_wc where completions
 *   will be returned
 *
 * Poll a CQ for (possibly multiple) completions.  If the return value
 * is < 0, an error occurred.  If the return value is >= 0, it is the
 * number of completions returned.  If the return value is
 * non-negative and < num_entries, then the CQ was emptied.
 */
static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
			     struct ib_wc *wc)
{
	return cq->device->poll_cq(cq, num_entries, wc);
}

/**
 * ib_peek_cq - Returns the number of unreaped completions currently
 *   on the specified CQ.
 * @cq: The CQ to peek.
 * @wc_cnt: A minimum number of unreaped completions to check for.
 *
 * If the number of unreaped completions is greater than or equal to wc_cnt,
 * this function returns wc_cnt, otherwise, it returns the actual number of
 * unreaped completions.
 */
int ib_peek_cq(struct ib_cq *cq, int wc_cnt);

/**
 * ib_req_notify_cq - Request completion notification on a CQ.
 * @cq: The CQ to generate an event for.
 * @flags:
 *   Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
 *   to request an event on the next solicited event or next work
 *   completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
 *   may also be |ed in to request a hint about missed events, as
 *   described below.
 *
 * Return Value:
 *    < 0 means an error occurred while requesting notification
 *   == 0 means notification was requested successfully, and if
 *        IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
 *        were missed and it is safe to wait for another event.  In
 *        this case is it guaranteed that any work completions added
 *        to the CQ since the last CQ poll will trigger a completion
 *        notification event.
 *    > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
 *        in.  It means that the consumer must poll the CQ again to
 *        make sure it is empty to avoid missing an event because of a
 *        race between requesting notification and an entry being
 *        added to the CQ.  This return value means it is possible
 *        (but not guaranteed) that a work completion has been added
 *        to the CQ since the last poll without triggering a
 *        completion notification event.
 */
static inline int ib_req_notify_cq(struct ib_cq *cq,
				   enum ib_cq_notify_flags flags)
{
	return cq->device->req_notify_cq(cq, flags);
}

/**
 * ib_req_ncomp_notif - Request completion notification when there are
 *   at least the specified number of unreaped completions on the CQ.
 * @cq: The CQ to generate an event for.
 * @wc_cnt: The number of unreaped completions that should be on the
 *   CQ before an event is generated.
 */
static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
{
	return cq->device->req_ncomp_notif ?
		cq->device->req_ncomp_notif(cq, wc_cnt) :
		-ENOSYS;
}

/**
 * ib_get_dma_mr - Returns a memory region for system memory that is
 *   usable for DMA.
 * @pd: The protection domain associated with the memory region.
 * @mr_access_flags: Specifies the memory access rights.
 *
 * Note that the ib_dma_*() functions defined below must be used
 * to create/destroy addresses used with the Lkey or Rkey returned
 * by ib_get_dma_mr().
 */
struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);

/**
 * ib_dma_mapping_error - check a DMA addr for error
 * @dev: The device for which the dma_addr was created
 * @dma_addr: The DMA address to check
 */
static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
{
	if (dev->dma_ops)
		return dev->dma_ops->mapping_error(dev, dma_addr);
	return dma_mapping_error(dev->dma_device, dma_addr);
}

/**
 * ib_dma_map_single - Map a kernel virtual address to DMA address
 * @dev: The device for which the dma_addr is to be created
 * @cpu_addr: The kernel virtual address
 * @size: The size of the region in bytes
 * @direction: The direction of the DMA
 */
static inline u64 ib_dma_map_single(struct ib_device *dev,
				    void *cpu_addr, size_t size,
				    enum dma_data_direction direction)
{
	if (dev->dma_ops)
		return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
	return dma_map_single(dev->dma_device, cpu_addr, size, direction);
}

/**
 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
 * @dev: The device for which the DMA address was created
 * @addr: The DMA address
 * @size: The size of the region in bytes
 * @direction: The direction of the DMA
 */
static inline void ib_dma_unmap_single(struct ib_device *dev,
				       u64 addr, size_t size,
				       enum dma_data_direction direction)
{
	if (dev->dma_ops)
		dev->dma_ops->unmap_single(dev, addr, size, direction);
	else
		dma_unmap_single(dev->dma_device, addr, size, direction);
}

static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
					  void *cpu_addr, size_t size,
					  enum dma_data_direction direction,
					  struct dma_attrs *attrs)
{
	return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
				    direction, attrs);
}

static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
					     u64 addr, size_t size,
					     enum dma_data_direction direction,
					     struct dma_attrs *attrs)
{
	return dma_unmap_single_attrs(dev->dma_device, addr, size,
				      direction, attrs);
}

/**
 * ib_dma_map_page - Map a physical page to DMA address
 * @dev: The device for which the dma_addr is to be created
 * @page: The page to be mapped
 * @offset: The offset within the page
 * @size: The size of the region in bytes
 * @direction: The direction of the DMA
 */
static inline u64 ib_dma_map_page(struct ib_device *dev,
				  struct page *page,
				  unsigned long offset,
				  size_t size,
					 enum dma_data_direction direction)
{
	if (dev->dma_ops)
		return dev->dma_ops->map_page(dev, page, offset, size, direction);
	return dma_map_page(dev->dma_device, page, offset, size, direction);
}

/**
 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
 * @dev: The device for which the DMA address was created
 * @addr: The DMA address
 * @size: The size of the region in bytes
 * @direction: The direction of the DMA
 */
static inline void ib_dma_unmap_page(struct ib_device *dev,
				     u64 addr, size_t size,
				     enum dma_data_direction direction)
{
	if (dev->dma_ops)
		dev->dma_ops->unmap_page(dev, addr, size, direction);
	else
		dma_unmap_page(dev->dma_device, addr, size, direction);
}

/**
 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
 * @dev: The device for which the DMA addresses are to be created
 * @sg: The array of scatter/gather entries
 * @nents: The number of scatter/gather entries
 * @direction: The direction of the DMA
 */
static inline int ib_dma_map_sg(struct ib_device *dev,
				struct scatterlist *sg, int nents,
				enum dma_data_direction direction)
{
	if (dev->dma_ops)
		return dev->dma_ops->map_sg(dev, sg, nents, direction);
	return dma_map_sg(dev->dma_device, sg, nents, direction);
}

/**
 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
 * @dev: The device for which the DMA addresses were created
 * @sg: The array of scatter/gather entries
 * @nents: The number of scatter/gather entries
 * @direction: The direction of the DMA
 */
static inline void ib_dma_unmap_sg(struct ib_device *dev,
				   struct scatterlist *sg, int nents,
				   enum dma_data_direction direction)
{
	if (dev->dma_ops)
		dev->dma_ops->unmap_sg(dev, sg, nents, direction);
	else
		dma_unmap_sg(dev->dma_device, sg, nents, direction);
}

static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
				      struct scatterlist *sg, int nents,
				      enum dma_data_direction direction,
				      struct dma_attrs *attrs)
{
	return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
}

static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
					 struct scatterlist *sg, int nents,
					 enum dma_data_direction direction,
					 struct dma_attrs *attrs)
{
	dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
}
/**
 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
 * @dev: The device for which the DMA addresses were created
 * @sg: The scatter/gather entry
 */
static inline u64 ib_sg_dma_address(struct ib_device *dev,
				    struct scatterlist *sg)
{
	if (dev->dma_ops)
		return dev->dma_ops->dma_address(dev, sg);
	return sg_dma_address(sg);
}

/**
 * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
 * @dev: The device for which the DMA addresses were created
 * @sg: The scatter/gather entry
 */
static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
					 struct scatterlist *sg)
{
	if (dev->dma_ops)
		return dev->dma_ops->dma_len(dev, sg);
	return sg_dma_len(sg);
}

/**
 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
 * @dev: The device for which the DMA address was created
 * @addr: The DMA address
 * @size: The size of the region in bytes
 * @dir: The direction of the DMA
 */
static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
					      u64 addr,
					      size_t size,
					      enum dma_data_direction dir)
{
	if (dev->dma_ops)
		dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
	else
		dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
}

/**
 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
 * @dev: The device for which the DMA address was created
 * @addr: The DMA address
 * @size: The size of the region in bytes
 * @dir: The direction of the DMA
 */
static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
						 u64 addr,
						 size_t size,
						 enum dma_data_direction dir)
{
	if (dev->dma_ops)
		dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
	else
		dma_sync_single_for_device(dev->dma_device, addr, size, dir);
}

/**
 * ib_dma_alloc_coherent - Allocate memory and map it for DMA
 * @dev: The device for which the DMA address is requested
 * @size: The size of the region to allocate in bytes
 * @dma_handle: A pointer for returning the DMA address of the region
 * @flag: memory allocator flags
 */
static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
					   size_t size,
					   u64 *dma_handle,
					   gfp_t flag)
{
	if (dev->dma_ops)
		return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
	else {
		dma_addr_t handle;
		void *ret;

		ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
		*dma_handle = handle;
		return ret;
	}
}

/**
 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
 * @dev: The device for which the DMA addresses were allocated
 * @size: The size of the region
 * @cpu_addr: the address returned by ib_dma_alloc_coherent()
 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
 */
static inline void ib_dma_free_coherent(struct ib_device *dev,
					size_t size, void *cpu_addr,
					u64 dma_handle)
{
	if (dev->dma_ops)
		dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
	else
		dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
}

/**
 * ib_reg_phys_mr - Prepares a virtually addressed memory region for use
 *   by an HCA.
 * @pd: The protection domain associated assigned to the registered region.
 * @phys_buf_array: Specifies a list of physical buffers to use in the
 *   memory region.
 * @num_phys_buf: Specifies the size of the phys_buf_array.
 * @mr_access_flags: Specifies the memory access rights.
 * @iova_start: The offset of the region's starting I/O virtual address.
 */
struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
			     struct ib_phys_buf *phys_buf_array,
			     int num_phys_buf,
			     int mr_access_flags,
			     u64 *iova_start);

/**
 * ib_rereg_phys_mr - Modifies the attributes of an existing memory region.
 *   Conceptually, this call performs the functions deregister memory region
 *   followed by register physical memory region.  Where possible,
 *   resources are reused instead of deallocated and reallocated.
 * @mr: The memory region to modify.
 * @mr_rereg_mask: A bit-mask used to indicate which of the following
 *   properties of the memory region are being modified.
 * @pd: If %IB_MR_REREG_PD is set in mr_rereg_mask, this field specifies
 *   the new protection domain to associated with the memory region,
 *   otherwise, this parameter is ignored.
 * @phys_buf_array: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
 *   field specifies a list of physical buffers to use in the new
 *   translation, otherwise, this parameter is ignored.
 * @num_phys_buf: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
 *   field specifies the size of the phys_buf_array, otherwise, this
 *   parameter is ignored.
 * @mr_access_flags: If %IB_MR_REREG_ACCESS is set in mr_rereg_mask, this
 *   field specifies the new memory access rights, otherwise, this
 *   parameter is ignored.
 * @iova_start: The offset of the region's starting I/O virtual address.
 */
int ib_rereg_phys_mr(struct ib_mr *mr,
		     int mr_rereg_mask,
		     struct ib_pd *pd,
		     struct ib_phys_buf *phys_buf_array,
		     int num_phys_buf,
		     int mr_access_flags,
		     u64 *iova_start);

/**
 * ib_query_mr - Retrieves information about a specific memory region.
 * @mr: The memory region to retrieve information about.
 * @mr_attr: The attributes of the specified memory region.
 */
int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);

/**
 * ib_dereg_mr - Deregisters a memory region and removes it from the
 *   HCA translation table.
 * @mr: The memory region to deregister.
 */
int ib_dereg_mr(struct ib_mr *mr);

/**
 * ib_alloc_fast_reg_mr - Allocates memory region usable with the
 *   IB_WR_FAST_REG_MR send work request.
 * @pd: The protection domain associated with the region.
 * @max_page_list_len: requested max physical buffer list length to be
 *   used with fast register work requests for this MR.
 */
struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);

/**
 * ib_alloc_fast_reg_page_list - Allocates a page list array
 * @device - ib device pointer.
 * @page_list_len - size of the page list array to be allocated.
 *
 * This allocates and returns a struct ib_fast_reg_page_list * and a
 * page_list array that is at least page_list_len in size.  The actual
 * size is returned in max_page_list_len.  The caller is responsible
 * for initializing the contents of the page_list array before posting
 * a send work request with the IB_WC_FAST_REG_MR opcode.
 *
 * The page_list array entries must be translated using one of the
 * ib_dma_*() functions just like the addresses passed to
 * ib_map_phys_fmr().  Once the ib_post_send() is issued, the struct
 * ib_fast_reg_page_list must not be modified by the caller until the
 * IB_WC_FAST_REG_MR work request completes.
 */
struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(
				struct ib_device *device, int page_list_len);

/**
 * ib_free_fast_reg_page_list - Deallocates a previously allocated
 *   page list array.
 * @page_list - struct ib_fast_reg_page_list pointer to be deallocated.
 */
void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);

/**
 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
 *   R_Key and L_Key.
 * @mr - struct ib_mr pointer to be updated.
 * @newkey - new key to be used.
 */
static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
{
	mr->lkey = (mr->lkey & 0xffffff00) | newkey;
	mr->rkey = (mr->rkey & 0xffffff00) | newkey;
}

/**
 * ib_alloc_mw - Allocates a memory window.
 * @pd: The protection domain associated with the memory window.
 */
struct ib_mw *ib_alloc_mw(struct ib_pd *pd);

/**
 * ib_bind_mw - Posts a work request to the send queue of the specified
 *   QP, which binds the memory window to the given address range and
 *   remote access attributes.
 * @qp: QP to post the bind work request on.
 * @mw: The memory window to bind.
 * @mw_bind: Specifies information about the memory window, including
 *   its address range, remote access rights, and associated memory region.
 */
static inline int ib_bind_mw(struct ib_qp *qp,
			     struct ib_mw *mw,
			     struct ib_mw_bind *mw_bind)
{
	/* XXX reference counting in corresponding MR? */
	return mw->device->bind_mw ?
		mw->device->bind_mw(qp, mw, mw_bind) :
		-ENOSYS;
}

/**
 * ib_dealloc_mw - Deallocates a memory window.
 * @mw: The memory window to deallocate.
 */
int ib_dealloc_mw(struct ib_mw *mw);

/**
 * ib_alloc_fmr - Allocates a unmapped fast memory region.
 * @pd: The protection domain associated with the unmapped region.
 * @mr_access_flags: Specifies the memory access rights.
 * @fmr_attr: Attributes of the unmapped region.
 *
 * A fast memory region must be mapped before it can be used as part of
 * a work request.
 */
struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
			    int mr_access_flags,
			    struct ib_fmr_attr *fmr_attr);

/**
 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
 * @fmr: The fast memory region to associate with the pages.
 * @page_list: An array of physical pages to map to the fast memory region.
 * @list_len: The number of pages in page_list.
 * @iova: The I/O virtual address to use with the mapped region.
 */
static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
				  u64 *page_list, int list_len,
				  u64 iova)
{
	return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
}

/**
 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
 * @fmr_list: A linked list of fast memory regions to unmap.
 */
int ib_unmap_fmr(struct list_head *fmr_list);

/**
 * ib_dealloc_fmr - Deallocates a fast memory region.
 * @fmr: The fast memory region to deallocate.
 */
int ib_dealloc_fmr(struct ib_fmr *fmr);

/**
 * ib_attach_mcast - Attaches the specified QP to a multicast group.
 * @qp: QP to attach to the multicast group.  The QP must be type
 *   IB_QPT_UD.
 * @gid: Multicast group GID.
 * @lid: Multicast group LID in host byte order.
 *
 * In order to send and receive multicast packets, subnet
 * administration must have created the multicast group and configured
 * the fabric appropriately.  The port associated with the specified
 * QP must also be a member of the multicast group.
 */
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);

/**
 * ib_detach_mcast - Detaches the specified QP from a multicast group.
 * @qp: QP to detach from the multicast group.
 * @gid: Multicast group GID.
 * @lid: Multicast group LID in host byte order.
 */
int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);

/**
 * ib_alloc_xrcd - Allocates an XRC domain.
 * @device: The device on which to allocate the XRC domain.
 */
struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);

/**
 * ib_dealloc_xrcd - Deallocates an XRC domain.
 * @xrcd: The XRC domain to deallocate.
 */
int ib_dealloc_xrcd(struct ib_xrcd *xrcd);

#endif /* IB_VERBS_H */