1 /*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
37 */
38
39 #if !defined(IB_VERBS_H)
40 #define IB_VERBS_H
41
42 #include <linux/types.h>
43 #include <linux/device.h>
44 #include <linux/mm.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/kref.h>
47 #include <linux/list.h>
48 #include <linux/rwsem.h>
49 #include <linux/scatterlist.h>
50 #include <linux/workqueue.h>
51
52 #include <asm/uaccess.h>
53 #include <linux/rbtree.h>
54 #include <linux/mutex.h>
55
56 extern struct workqueue_struct *ib_wq;
57
58 union ib_gid {
59 u8 raw[16];
60 struct {
61 __be64 subnet_prefix;
62 __be64 interface_id;
63 } global;
64 };
65
66 enum rdma_node_type {
67 /* IB values map to NodeInfo:NodeType. */
68 RDMA_NODE_IB_CA = 1,
69 RDMA_NODE_IB_SWITCH,
70 RDMA_NODE_IB_ROUTER,
71 RDMA_NODE_RNIC
72 };
73
74 enum rdma_transport_type {
75 RDMA_TRANSPORT_IB,
76 RDMA_TRANSPORT_IWARP
77 };
78
79 enum rdma_transport_type
80 rdma_node_get_transport(enum rdma_node_type node_type) __attribute_const__;
81
82 enum rdma_link_layer {
83 IB_LINK_LAYER_UNSPECIFIED,
84 IB_LINK_LAYER_INFINIBAND,
85 IB_LINK_LAYER_ETHERNET,
86 };
87
88 enum ib_device_cap_flags {
89 IB_DEVICE_RESIZE_MAX_WR = 1,
90 IB_DEVICE_BAD_PKEY_CNTR = (1<<1),
91 IB_DEVICE_BAD_QKEY_CNTR = (1<<2),
92 IB_DEVICE_RAW_MULTI = (1<<3),
93 IB_DEVICE_AUTO_PATH_MIG = (1<<4),
94 IB_DEVICE_CHANGE_PHY_PORT = (1<<5),
95 IB_DEVICE_UD_AV_PORT_ENFORCE = (1<<6),
96 IB_DEVICE_CURR_QP_STATE_MOD = (1<<7),
97 IB_DEVICE_SHUTDOWN_PORT = (1<<8),
98 IB_DEVICE_INIT_TYPE = (1<<9),
99 IB_DEVICE_PORT_ACTIVE_EVENT = (1<<10),
100 IB_DEVICE_SYS_IMAGE_GUID = (1<<11),
101 IB_DEVICE_RC_RNR_NAK_GEN = (1<<12),
102 IB_DEVICE_SRQ_RESIZE = (1<<13),
103 IB_DEVICE_N_NOTIFY_CQ = (1<<14),
104 IB_DEVICE_LOCAL_DMA_LKEY = (1<<15),
105 IB_DEVICE_RESERVED = (1<<16), /* old SEND_W_INV */
106 IB_DEVICE_MEM_WINDOW = (1<<17),
107 /*
108 * Devices should set IB_DEVICE_UD_IP_SUM if they support
109 * insertion of UDP and TCP checksum on outgoing UD IPoIB
110 * messages and can verify the validity of checksum for
111 * incoming messages. Setting this flag implies that the
112 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
113 */
114 IB_DEVICE_UD_IP_CSUM = (1<<18),
115 IB_DEVICE_UD_TSO = (1<<19),
116 IB_DEVICE_XRC = (1<<20),
117 IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21),
118 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
119 IB_DEVICE_MR_ALLOCATE = (1<<23),
120 IB_DEVICE_SHARED_MR = (1<<24),
121 IB_DEVICE_QPG = (1<<25),
122 IB_DEVICE_UD_RSS = (1<<26),
123 IB_DEVICE_UD_TSS = (1<<27)
124 };
125
126 enum ib_atomic_cap {
127 IB_ATOMIC_NONE,
128 IB_ATOMIC_HCA,
129 IB_ATOMIC_GLOB
130 };
131
132 struct ib_device_attr {
133 u64 fw_ver;
134 __be64 sys_image_guid;
135 u64 max_mr_size;
136 u64 page_size_cap;
137 u32 vendor_id;
138 u32 vendor_part_id;
139 u32 hw_ver;
140 int max_qp;
141 int max_qp_wr;
142 int device_cap_flags;
143 int max_sge;
144 int max_sge_rd;
145 int max_cq;
146 int max_cqe;
147 int max_mr;
148 int max_pd;
149 int max_qp_rd_atom;
150 int max_ee_rd_atom;
151 int max_res_rd_atom;
152 int max_qp_init_rd_atom;
153 int max_ee_init_rd_atom;
154 enum ib_atomic_cap atomic_cap;
155 enum ib_atomic_cap masked_atomic_cap;
156 int max_ee;
157 int max_rdd;
158 int max_mw;
159 int max_raw_ipv6_qp;
160 int max_raw_ethy_qp;
161 int max_mcast_grp;
162 int max_mcast_qp_attach;
163 int max_total_mcast_qp_attach;
164 int max_ah;
165 int max_fmr;
166 int max_map_per_fmr;
167 int max_srq;
168 int max_srq_wr;
169 int max_srq_sge;
170 unsigned int max_fast_reg_page_list_len;
171 int max_rss_tbl_sz;
172 u16 max_pkeys;
173 u8 local_ca_ack_delay;
174 };
175
176 enum ib_mtu {
177 IB_MTU_256 = 1,
178 IB_MTU_512 = 2,
179 IB_MTU_1024 = 3,
180 IB_MTU_2048 = 4,
181 IB_MTU_4096 = 5
182 };
183
ib_mtu_enum_to_int(enum ib_mtu mtu)184 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
185 {
186 switch (mtu) {
187 case IB_MTU_256: return 256;
188 case IB_MTU_512: return 512;
189 case IB_MTU_1024: return 1024;
190 case IB_MTU_2048: return 2048;
191 case IB_MTU_4096: return 4096;
192 default: return -1;
193 }
194 }
195
196 enum ib_port_state {
197 IB_PORT_NOP = 0,
198 IB_PORT_DOWN = 1,
199 IB_PORT_INIT = 2,
200 IB_PORT_ARMED = 3,
201 IB_PORT_ACTIVE = 4,
202 IB_PORT_ACTIVE_DEFER = 5
203 };
204
205 enum ib_port_cap_flags {
206 IB_PORT_SM = 1 << 1,
207 IB_PORT_NOTICE_SUP = 1 << 2,
208 IB_PORT_TRAP_SUP = 1 << 3,
209 IB_PORT_OPT_IPD_SUP = 1 << 4,
210 IB_PORT_AUTO_MIGR_SUP = 1 << 5,
211 IB_PORT_SL_MAP_SUP = 1 << 6,
212 IB_PORT_MKEY_NVRAM = 1 << 7,
213 IB_PORT_PKEY_NVRAM = 1 << 8,
214 IB_PORT_LED_INFO_SUP = 1 << 9,
215 IB_PORT_SM_DISABLED = 1 << 10,
216 IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11,
217 IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
218 IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14,
219 IB_PORT_CM_SUP = 1 << 16,
220 IB_PORT_SNMP_TUNNEL_SUP = 1 << 17,
221 IB_PORT_REINIT_SUP = 1 << 18,
222 IB_PORT_DEVICE_MGMT_SUP = 1 << 19,
223 IB_PORT_VENDOR_CLASS_SUP = 1 << 20,
224 IB_PORT_DR_NOTICE_SUP = 1 << 21,
225 IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22,
226 IB_PORT_BOOT_MGMT_SUP = 1 << 23,
227 IB_PORT_LINK_LATENCY_SUP = 1 << 24,
228 IB_PORT_CLIENT_REG_SUP = 1 << 25
229 };
230
231 enum ib_port_width {
232 IB_WIDTH_1X = 1,
233 IB_WIDTH_4X = 2,
234 IB_WIDTH_8X = 4,
235 IB_WIDTH_12X = 8
236 };
237
ib_width_enum_to_int(enum ib_port_width width)238 static inline int ib_width_enum_to_int(enum ib_port_width width)
239 {
240 switch (width) {
241 case IB_WIDTH_1X: return 1;
242 case IB_WIDTH_4X: return 4;
243 case IB_WIDTH_8X: return 8;
244 case IB_WIDTH_12X: return 12;
245 default: return -1;
246 }
247 }
248
249 enum ib_port_speed {
250 IB_SPEED_SDR = 1,
251 IB_SPEED_DDR = 2,
252 IB_SPEED_QDR = 4,
253 IB_SPEED_FDR10 = 8,
254 IB_SPEED_FDR = 16,
255 IB_SPEED_EDR = 32
256 };
257
258 struct ib_protocol_stats {
259 /* TBD... */
260 };
261
262 struct iw_protocol_stats {
263 u64 ipInReceives;
264 u64 ipInHdrErrors;
265 u64 ipInTooBigErrors;
266 u64 ipInNoRoutes;
267 u64 ipInAddrErrors;
268 u64 ipInUnknownProtos;
269 u64 ipInTruncatedPkts;
270 u64 ipInDiscards;
271 u64 ipInDelivers;
272 u64 ipOutForwDatagrams;
273 u64 ipOutRequests;
274 u64 ipOutDiscards;
275 u64 ipOutNoRoutes;
276 u64 ipReasmTimeout;
277 u64 ipReasmReqds;
278 u64 ipReasmOKs;
279 u64 ipReasmFails;
280 u64 ipFragOKs;
281 u64 ipFragFails;
282 u64 ipFragCreates;
283 u64 ipInMcastPkts;
284 u64 ipOutMcastPkts;
285 u64 ipInBcastPkts;
286 u64 ipOutBcastPkts;
287
288 u64 tcpRtoAlgorithm;
289 u64 tcpRtoMin;
290 u64 tcpRtoMax;
291 u64 tcpMaxConn;
292 u64 tcpActiveOpens;
293 u64 tcpPassiveOpens;
294 u64 tcpAttemptFails;
295 u64 tcpEstabResets;
296 u64 tcpCurrEstab;
297 u64 tcpInSegs;
298 u64 tcpOutSegs;
299 u64 tcpRetransSegs;
300 u64 tcpInErrs;
301 u64 tcpOutRsts;
302 };
303
304 union rdma_protocol_stats {
305 struct ib_protocol_stats ib;
306 struct iw_protocol_stats iw;
307 };
308
309 struct ib_port_attr {
310 enum ib_port_state state;
311 enum ib_mtu max_mtu;
312 enum ib_mtu active_mtu;
313 int gid_tbl_len;
314 u32 port_cap_flags;
315 u32 max_msg_sz;
316 u32 bad_pkey_cntr;
317 u32 qkey_viol_cntr;
318 u16 pkey_tbl_len;
319 u16 lid;
320 u16 sm_lid;
321 u8 lmc;
322 u8 max_vl_num;
323 u8 sm_sl;
324 u8 subnet_timeout;
325 u8 init_type_reply;
326 u8 active_width;
327 u8 active_speed;
328 u8 phys_state;
329 enum rdma_link_layer link_layer;
330 };
331
332 enum ib_device_modify_flags {
333 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
334 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1
335 };
336
337 struct ib_device_modify {
338 u64 sys_image_guid;
339 char node_desc[64];
340 };
341
342 enum ib_port_modify_flags {
343 IB_PORT_SHUTDOWN = 1,
344 IB_PORT_INIT_TYPE = (1<<2),
345 IB_PORT_RESET_QKEY_CNTR = (1<<3)
346 };
347
348 struct ib_port_modify {
349 u32 set_port_cap_mask;
350 u32 clr_port_cap_mask;
351 u8 init_type;
352 };
353
354 enum ib_event_type {
355 IB_EVENT_CQ_ERR,
356 IB_EVENT_QP_FATAL,
357 IB_EVENT_QP_REQ_ERR,
358 IB_EVENT_QP_ACCESS_ERR,
359 IB_EVENT_COMM_EST,
360 IB_EVENT_SQ_DRAINED,
361 IB_EVENT_PATH_MIG,
362 IB_EVENT_PATH_MIG_ERR,
363 IB_EVENT_DEVICE_FATAL,
364 IB_EVENT_PORT_ACTIVE,
365 IB_EVENT_PORT_ERR,
366 IB_EVENT_LID_CHANGE,
367 IB_EVENT_PKEY_CHANGE,
368 IB_EVENT_SM_CHANGE,
369 IB_EVENT_SRQ_ERR,
370 IB_EVENT_SRQ_LIMIT_REACHED,
371 IB_EVENT_QP_LAST_WQE_REACHED,
372 IB_EVENT_CLIENT_REREGISTER,
373 IB_EVENT_GID_CHANGE,
374 };
375
376 enum ib_event_flags {
377 IB_XRC_QP_EVENT_FLAG = 0x80000000,
378 };
379
380 struct ib_event {
381 struct ib_device *device;
382 union {
383 struct ib_cq *cq;
384 struct ib_qp *qp;
385 struct ib_srq *srq;
386 u8 port_num;
387 u32 xrc_qp_num;
388 } element;
389 enum ib_event_type event;
390 };
391
392 struct ib_event_handler {
393 struct ib_device *device;
394 void (*handler)(struct ib_event_handler *, struct ib_event *);
395 struct list_head list;
396 };
397
398 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \
399 do { \
400 (_ptr)->device = _device; \
401 (_ptr)->handler = _handler; \
402 INIT_LIST_HEAD(&(_ptr)->list); \
403 } while (0)
404
405 struct ib_global_route {
406 union ib_gid dgid;
407 u32 flow_label;
408 u8 sgid_index;
409 u8 hop_limit;
410 u8 traffic_class;
411 };
412
413 struct ib_grh {
414 __be32 version_tclass_flow;
415 __be16 paylen;
416 u8 next_hdr;
417 u8 hop_limit;
418 union ib_gid sgid;
419 union ib_gid dgid;
420 };
421
422 enum {
423 IB_MULTICAST_QPN = 0xffffff
424 };
425
426 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF)
427
428 enum ib_ah_flags {
429 IB_AH_GRH = 1
430 };
431
432 enum ib_rate {
433 IB_RATE_PORT_CURRENT = 0,
434 IB_RATE_2_5_GBPS = 2,
435 IB_RATE_5_GBPS = 5,
436 IB_RATE_10_GBPS = 3,
437 IB_RATE_20_GBPS = 6,
438 IB_RATE_30_GBPS = 4,
439 IB_RATE_40_GBPS = 7,
440 IB_RATE_60_GBPS = 8,
441 IB_RATE_80_GBPS = 9,
442 IB_RATE_120_GBPS = 10,
443 IB_RATE_14_GBPS = 11,
444 IB_RATE_56_GBPS = 12,
445 IB_RATE_112_GBPS = 13,
446 IB_RATE_168_GBPS = 14,
447 IB_RATE_25_GBPS = 15,
448 IB_RATE_100_GBPS = 16,
449 IB_RATE_200_GBPS = 17,
450 IB_RATE_300_GBPS = 18
451 };
452
453 /**
454 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
455 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be
456 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
457 * @rate: rate to convert.
458 */
459 int ib_rate_to_mult(enum ib_rate rate) __attribute_const__;
460
461 /**
462 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
463 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
464 * @rate: rate to convert.
465 */
466 int ib_rate_to_mbps(enum ib_rate rate) __attribute_const__;
467
468 /**
469 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
470 * enum.
471 * @mult: multiple to convert.
472 */
473 enum ib_rate mult_to_ib_rate(int mult) __attribute_const__;
474
475 struct ib_ah_attr {
476 struct ib_global_route grh;
477 u16 dlid;
478 u8 sl;
479 u8 src_path_bits;
480 u8 static_rate;
481 u8 ah_flags;
482 u8 port_num;
483 };
484
485 enum ib_wc_status {
486 IB_WC_SUCCESS,
487 IB_WC_LOC_LEN_ERR,
488 IB_WC_LOC_QP_OP_ERR,
489 IB_WC_LOC_EEC_OP_ERR,
490 IB_WC_LOC_PROT_ERR,
491 IB_WC_WR_FLUSH_ERR,
492 IB_WC_MW_BIND_ERR,
493 IB_WC_BAD_RESP_ERR,
494 IB_WC_LOC_ACCESS_ERR,
495 IB_WC_REM_INV_REQ_ERR,
496 IB_WC_REM_ACCESS_ERR,
497 IB_WC_REM_OP_ERR,
498 IB_WC_RETRY_EXC_ERR,
499 IB_WC_RNR_RETRY_EXC_ERR,
500 IB_WC_LOC_RDD_VIOL_ERR,
501 IB_WC_REM_INV_RD_REQ_ERR,
502 IB_WC_REM_ABORT_ERR,
503 IB_WC_INV_EECN_ERR,
504 IB_WC_INV_EEC_STATE_ERR,
505 IB_WC_FATAL_ERR,
506 IB_WC_RESP_TIMEOUT_ERR,
507 IB_WC_GENERAL_ERR
508 };
509
510 enum ib_wc_opcode {
511 IB_WC_SEND,
512 IB_WC_RDMA_WRITE,
513 IB_WC_RDMA_READ,
514 IB_WC_COMP_SWAP,
515 IB_WC_FETCH_ADD,
516 IB_WC_BIND_MW,
517 IB_WC_LSO,
518 IB_WC_LOCAL_INV,
519 IB_WC_FAST_REG_MR,
520 IB_WC_MASKED_COMP_SWAP,
521 IB_WC_MASKED_FETCH_ADD,
522 /*
523 * Set value of IB_WC_RECV so consumers can test if a completion is a
524 * receive by testing (opcode & IB_WC_RECV).
525 */
526 IB_WC_RECV = 1 << 7,
527 IB_WC_RECV_RDMA_WITH_IMM
528 };
529
530 enum ib_wc_flags {
531 IB_WC_GRH = 1,
532 IB_WC_WITH_IMM = (1<<1),
533 IB_WC_WITH_INVALIDATE = (1<<2),
534 IB_WC_IP_CSUM_OK = (1<<3),
535 };
536
537 struct ib_wc {
538 u64 wr_id;
539 enum ib_wc_status status;
540 enum ib_wc_opcode opcode;
541 u32 vendor_err;
542 u32 byte_len;
543 struct ib_qp *qp;
544 union {
545 __be32 imm_data;
546 u32 invalidate_rkey;
547 } ex;
548 u32 src_qp;
549 int wc_flags;
550 u16 pkey_index;
551 u16 slid;
552 u8 sl;
553 u8 dlid_path_bits;
554 u8 port_num; /* valid only for DR SMPs on switches */
555 int csum_ok;
556 };
557
558 enum ib_cq_notify_flags {
559 IB_CQ_SOLICITED = 1 << 0,
560 IB_CQ_NEXT_COMP = 1 << 1,
561 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
562 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2,
563 };
564
565 enum ib_srq_type {
566 IB_SRQT_BASIC,
567 IB_SRQT_XRC
568 };
569
570 enum ib_srq_attr_mask {
571 IB_SRQ_MAX_WR = 1 << 0,
572 IB_SRQ_LIMIT = 1 << 1,
573 };
574
575 struct ib_srq_attr {
576 u32 max_wr;
577 u32 max_sge;
578 u32 srq_limit;
579 };
580
581 struct ib_srq_init_attr {
582 void (*event_handler)(struct ib_event *, void *);
583 void *srq_context;
584 struct ib_srq_attr attr;
585 enum ib_srq_type srq_type;
586
587 union {
588 struct {
589 struct ib_xrcd *xrcd;
590 struct ib_cq *cq;
591 } xrc;
592 } ext;
593 };
594
595 struct ib_qp_cap {
596 u32 max_send_wr;
597 u32 max_recv_wr;
598 u32 max_send_sge;
599 u32 max_recv_sge;
600 u32 max_inline_data;
601 u32 qpg_tss_mask_sz;
602 };
603
604 enum ib_sig_type {
605 IB_SIGNAL_ALL_WR,
606 IB_SIGNAL_REQ_WR
607 };
608
609 enum ib_qp_type {
610 /*
611 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
612 * here (and in that order) since the MAD layer uses them as
613 * indices into a 2-entry table.
614 */
615 IB_QPT_SMI,
616 IB_QPT_GSI,
617
618 IB_QPT_RC,
619 IB_QPT_UC,
620 IB_QPT_UD,
621 IB_QPT_XRC,
622 IB_QPT_RAW_IPV6,
623 IB_QPT_RAW_ETHERTYPE,
624 IB_QPT_RAW_PACKET = 8,
625 IB_QPT_XRC_INI = 9,
626 IB_QPT_XRC_TGT,
627 IB_QPT_MAX,
628 };
629
630 enum ib_qp_create_flags {
631 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
632 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1,
633 IB_QP_CREATE_NETIF_QP = 1 << 2,
634 /* reserve bits 26-31 for low level drivers' internal use */
635 IB_QP_CREATE_RESERVED_START = 1 << 26,
636 IB_QP_CREATE_RESERVED_END = 1 << 31,
637 };
638
639 enum ib_qpg_type {
640 IB_QPG_NONE = 0,
641 IB_QPG_PARENT = (1<<0),
642 IB_QPG_CHILD_RX = (1<<1),
643 IB_QPG_CHILD_TX = (1<<2)
644 };
645
646 struct ib_qpg_init_attrib {
647 u32 tss_child_count;
648 u32 rss_child_count;
649 };
650
651 struct ib_qp_init_attr {
652 void (*event_handler)(struct ib_event *, void *);
653 void *qp_context;
654 struct ib_cq *send_cq;
655 struct ib_cq *recv_cq;
656 struct ib_srq *srq;
657 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
658 struct ib_qp_cap cap;
659 union {
660 struct ib_qp *qpg_parent; /* see qpg_type */
661 struct ib_qpg_init_attrib parent_attrib;
662 } pp;
663 enum ib_sig_type sq_sig_type;
664 enum ib_qp_type qp_type;
665 enum ib_qp_create_flags create_flags;
666 enum ib_qpg_type qpg_type;
667 u8 port_num; /* special QP types only */
668 };
669
670 struct ib_qp_open_attr {
671 void (*event_handler)(struct ib_event *, void *);
672 void *qp_context;
673 u32 qp_num;
674 enum ib_qp_type qp_type;
675 };
676
677 enum ib_rnr_timeout {
678 IB_RNR_TIMER_655_36 = 0,
679 IB_RNR_TIMER_000_01 = 1,
680 IB_RNR_TIMER_000_02 = 2,
681 IB_RNR_TIMER_000_03 = 3,
682 IB_RNR_TIMER_000_04 = 4,
683 IB_RNR_TIMER_000_06 = 5,
684 IB_RNR_TIMER_000_08 = 6,
685 IB_RNR_TIMER_000_12 = 7,
686 IB_RNR_TIMER_000_16 = 8,
687 IB_RNR_TIMER_000_24 = 9,
688 IB_RNR_TIMER_000_32 = 10,
689 IB_RNR_TIMER_000_48 = 11,
690 IB_RNR_TIMER_000_64 = 12,
691 IB_RNR_TIMER_000_96 = 13,
692 IB_RNR_TIMER_001_28 = 14,
693 IB_RNR_TIMER_001_92 = 15,
694 IB_RNR_TIMER_002_56 = 16,
695 IB_RNR_TIMER_003_84 = 17,
696 IB_RNR_TIMER_005_12 = 18,
697 IB_RNR_TIMER_007_68 = 19,
698 IB_RNR_TIMER_010_24 = 20,
699 IB_RNR_TIMER_015_36 = 21,
700 IB_RNR_TIMER_020_48 = 22,
701 IB_RNR_TIMER_030_72 = 23,
702 IB_RNR_TIMER_040_96 = 24,
703 IB_RNR_TIMER_061_44 = 25,
704 IB_RNR_TIMER_081_92 = 26,
705 IB_RNR_TIMER_122_88 = 27,
706 IB_RNR_TIMER_163_84 = 28,
707 IB_RNR_TIMER_245_76 = 29,
708 IB_RNR_TIMER_327_68 = 30,
709 IB_RNR_TIMER_491_52 = 31
710 };
711
712 enum ib_qp_attr_mask {
713 IB_QP_STATE = 1,
714 IB_QP_CUR_STATE = (1<<1),
715 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2),
716 IB_QP_ACCESS_FLAGS = (1<<3),
717 IB_QP_PKEY_INDEX = (1<<4),
718 IB_QP_PORT = (1<<5),
719 IB_QP_QKEY = (1<<6),
720 IB_QP_AV = (1<<7),
721 IB_QP_PATH_MTU = (1<<8),
722 IB_QP_TIMEOUT = (1<<9),
723 IB_QP_RETRY_CNT = (1<<10),
724 IB_QP_RNR_RETRY = (1<<11),
725 IB_QP_RQ_PSN = (1<<12),
726 IB_QP_MAX_QP_RD_ATOMIC = (1<<13),
727 IB_QP_ALT_PATH = (1<<14),
728 IB_QP_MIN_RNR_TIMER = (1<<15),
729 IB_QP_SQ_PSN = (1<<16),
730 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17),
731 IB_QP_PATH_MIG_STATE = (1<<18),
732 IB_QP_CAP = (1<<19),
733 IB_QP_DEST_QPN = (1<<20),
734 IB_QP_GROUP_RSS = (1<<21)
735 };
736
737 enum ib_qp_state {
738 IB_QPS_RESET,
739 IB_QPS_INIT,
740 IB_QPS_RTR,
741 IB_QPS_RTS,
742 IB_QPS_SQD,
743 IB_QPS_SQE,
744 IB_QPS_ERR
745 };
746
747 enum ib_mig_state {
748 IB_MIG_MIGRATED,
749 IB_MIG_REARM,
750 IB_MIG_ARMED
751 };
752
753 struct ib_qp_attr {
754 enum ib_qp_state qp_state;
755 enum ib_qp_state cur_qp_state;
756 enum ib_mtu path_mtu;
757 enum ib_mig_state path_mig_state;
758 u32 qkey;
759 u32 rq_psn;
760 u32 sq_psn;
761 u32 dest_qp_num;
762 int qp_access_flags;
763 struct ib_qp_cap cap;
764 struct ib_ah_attr ah_attr;
765 struct ib_ah_attr alt_ah_attr;
766 u16 pkey_index;
767 u16 alt_pkey_index;
768 u8 en_sqd_async_notify;
769 u8 sq_draining;
770 u8 max_rd_atomic;
771 u8 max_dest_rd_atomic;
772 u8 min_rnr_timer;
773 u8 port_num;
774 u8 timeout;
775 u8 retry_cnt;
776 u8 rnr_retry;
777 u8 alt_port_num;
778 u8 alt_timeout;
779 };
780
781 enum ib_wr_opcode {
782 IB_WR_RDMA_WRITE,
783 IB_WR_RDMA_WRITE_WITH_IMM,
784 IB_WR_SEND,
785 IB_WR_SEND_WITH_IMM,
786 IB_WR_RDMA_READ,
787 IB_WR_ATOMIC_CMP_AND_SWP,
788 IB_WR_ATOMIC_FETCH_AND_ADD,
789 IB_WR_LSO,
790 IB_WR_BIG_LSO,
791 IB_WR_SEND_WITH_INV,
792 IB_WR_RDMA_READ_WITH_INV,
793 IB_WR_LOCAL_INV,
794 IB_WR_FAST_REG_MR,
795 IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
796 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
797 };
798
799 enum ib_send_flags {
800 IB_SEND_FENCE = 1,
801 IB_SEND_SIGNALED = (1<<1),
802 IB_SEND_SOLICITED = (1<<2),
803 IB_SEND_INLINE = (1<<3),
804 IB_SEND_IP_CSUM = (1<<4)
805 };
806
807 enum ib_flow_types {
808 IB_FLOW_ETH = 0,
809 IB_FLOW_IB_UC = 1,
810 IB_FLOW_IB_MC_IPV4 = 2,
811 IB_FLOW_IB_MC_IPV6 = 3
812 };
813
814 enum {
815 IB_FLOW_L4_NONE = 0,
816 IB_FLOW_L4_OTHER = 3,
817 IB_FLOW_L4_UDP = 5,
818 IB_FLOW_L4_TCP = 6
819 };
820
821 struct ib_sge {
822 u64 addr;
823 u32 length;
824 u32 lkey;
825 };
826
827 struct ib_fast_reg_page_list {
828 struct ib_device *device;
829 u64 *page_list;
830 unsigned int max_page_list_len;
831 };
832
833 struct ib_send_wr {
834 struct ib_send_wr *next;
835 u64 wr_id;
836 struct ib_sge *sg_list;
837 int num_sge;
838 enum ib_wr_opcode opcode;
839 int send_flags;
840 union {
841 __be32 imm_data;
842 u32 invalidate_rkey;
843 } ex;
844 union {
845 struct {
846 u64 remote_addr;
847 u32 rkey;
848 } rdma;
849 struct {
850 u64 remote_addr;
851 u64 compare_add;
852 u64 swap;
853 u64 compare_add_mask;
854 u64 swap_mask;
855 u32 rkey;
856 } atomic;
857 struct {
858 struct ib_ah *ah;
859 void *header;
860 int hlen;
861 int mss;
862 u32 remote_qpn;
863 u32 remote_qkey;
864 u16 pkey_index; /* valid for GSI only */
865 u8 port_num; /* valid for DR SMPs on switch only */
866 } ud;
867 struct {
868 u64 iova_start;
869 struct ib_fast_reg_page_list *page_list;
870 unsigned int page_shift;
871 unsigned int page_list_len;
872 u32 length;
873 int access_flags;
874 u32 rkey;
875 } fast_reg;
876 struct {
877 struct ib_unpacked_lrh *lrh;
878 u32 eth_type;
879 u8 static_rate;
880 } raw_ety;
881 } wr;
882 u32 xrc_remote_srq_num; /* XRC TGT QPs only */
883 };
884
885 struct ib_recv_wr {
886 struct ib_recv_wr *next;
887 u64 wr_id;
888 struct ib_sge *sg_list;
889 int num_sge;
890 };
891
892 enum ib_access_flags {
893 IB_ACCESS_LOCAL_WRITE = 1,
894 IB_ACCESS_REMOTE_WRITE = (1<<1),
895 IB_ACCESS_REMOTE_READ = (1<<2),
896 IB_ACCESS_REMOTE_ATOMIC = (1<<3),
897 IB_ACCESS_MW_BIND = (1<<4),
898 IB_ACCESS_ALLOCATE_MR = (1<<5),
899 IB_ACCESS_SHARED_MR_USER_READ = (1<<6),
900 IB_ACCESS_SHARED_MR_USER_WRITE = (1<<7),
901 IB_ACCESS_SHARED_MR_GROUP_READ = (1<<8),
902 IB_ACCESS_SHARED_MR_GROUP_WRITE = (1<<9),
903 IB_ACCESS_SHARED_MR_OTHER_READ = (1<<10),
904 IB_ACCESS_SHARED_MR_OTHER_WRITE = (1<<11)
905
906 };
907
908 struct ib_phys_buf {
909 u64 addr;
910 u64 size;
911 };
912
913 struct ib_mr_attr {
914 struct ib_pd *pd;
915 u64 device_virt_addr;
916 u64 size;
917 int mr_access_flags;
918 u32 lkey;
919 u32 rkey;
920 };
921
922 enum ib_mr_rereg_flags {
923 IB_MR_REREG_TRANS = 1,
924 IB_MR_REREG_PD = (1<<1),
925 IB_MR_REREG_ACCESS = (1<<2)
926 };
927
928 struct ib_mw_bind {
929 struct ib_mr *mr;
930 u64 wr_id;
931 u64 addr;
932 u32 length;
933 int send_flags;
934 int mw_access_flags;
935 };
936
937 struct ib_fmr_attr {
938 int max_pages;
939 int max_maps;
940 u8 page_shift;
941 };
942
943 struct ib_ucontext {
944 struct ib_device *device;
945 struct list_head pd_list;
946 struct list_head mr_list;
947 struct list_head mw_list;
948 struct list_head cq_list;
949 struct list_head qp_list;
950 struct list_head srq_list;
951 struct list_head ah_list;
952 struct list_head xrcd_list;
953 int closing;
954 };
955
956 struct ib_uobject {
957 u64 user_handle; /* handle given to us by userspace */
958 struct ib_ucontext *context; /* associated user context */
959 void *object; /* containing object */
960 struct list_head list; /* link to context's list */
961 int id; /* index into kernel idr */
962 struct kref ref;
963 struct rw_semaphore mutex; /* protects .live */
964 int live;
965 };
966
967 struct ib_udata {
968 void __user *inbuf;
969 void __user *outbuf;
970 size_t inlen;
971 size_t outlen;
972 };
973
974 struct ib_uxrc_rcv_object {
975 struct list_head list; /* link to context's list */
976 u32 qp_num;
977 u32 domain_handle;
978 };
979
980 struct ib_pd {
981 struct ib_device *device;
982 struct ib_uobject *uobject;
983 atomic_t usecnt; /* count all resources */
984 };
985
986 struct ib_xrcd {
987 struct ib_device *device;
988 struct ib_uobject *uobject;
989 atomic_t usecnt; /* count all exposed resources */
990 struct inode *inode;
991 struct rb_node node;
992
993 struct mutex tgt_qp_mutex;
994 struct list_head tgt_qp_list;
995 };
996
997 struct ib_ah {
998 struct ib_device *device;
999 struct ib_pd *pd;
1000 struct ib_uobject *uobject;
1001 };
1002
1003 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1004
1005 struct ib_cq {
1006 struct ib_device *device;
1007 struct ib_uobject *uobject;
1008 ib_comp_handler comp_handler;
1009 void (*event_handler)(struct ib_event *, void *);
1010 void *cq_context;
1011 int cqe;
1012 atomic_t usecnt; /* count number of work queues */
1013 };
1014
1015 struct ib_srq {
1016 struct ib_device *device;
1017 struct ib_pd *pd;
1018 struct ib_uobject *uobject;
1019 void (*event_handler)(struct ib_event *, void *);
1020 void *srq_context;
1021 enum ib_srq_type srq_type;
1022 atomic_t usecnt;
1023
1024 union {
1025 struct {
1026 struct ib_xrcd *xrcd;
1027 struct ib_cq *cq;
1028 u32 srq_num;
1029 } xrc;
1030 } ext;
1031 };
1032
1033 struct ib_qp {
1034 struct ib_device *device;
1035 struct ib_pd *pd;
1036 struct ib_cq *send_cq;
1037 struct ib_cq *recv_cq;
1038 struct ib_srq *srq;
1039 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1040 struct list_head xrcd_list;
1041 atomic_t usecnt; /* count times opened, mcast attaches */
1042 struct list_head open_list;
1043 struct ib_qp *real_qp;
1044 struct ib_uobject *uobject;
1045 void (*event_handler)(struct ib_event *, void *);
1046 void *qp_context;
1047 u32 qp_num;
1048 enum ib_qp_type qp_type;
1049 enum ib_qpg_type qpg_type;
1050 };
1051
1052 struct ib_mr {
1053 struct ib_device *device;
1054 struct ib_pd *pd;
1055 struct ib_uobject *uobject;
1056 u32 lkey;
1057 u32 rkey;
1058 atomic_t usecnt; /* count number of MWs */
1059 };
1060
1061 struct ib_mw {
1062 struct ib_device *device;
1063 struct ib_pd *pd;
1064 struct ib_uobject *uobject;
1065 u32 rkey;
1066 };
1067
1068 struct ib_fmr {
1069 struct ib_device *device;
1070 struct ib_pd *pd;
1071 struct list_head list;
1072 u32 lkey;
1073 u32 rkey;
1074 };
1075
1076 struct ib_flow_spec {
1077 enum ib_flow_types type;
1078 union {
1079 struct {
1080 __be16 ethertype;
1081 __be16 vlan;
1082 u8 vlan_present;
1083 u8 mac[6];
1084 u8 port;
1085 } eth;
1086 struct {
1087 __be32 qpn;
1088 } ib_uc;
1089 struct {
1090 u8 mgid[16];
1091 } ib_mc;
1092 } l2_id;
1093 __be32 src_ip;
1094 __be32 dst_ip;
1095 __be16 src_port;
1096 __be16 dst_port;
1097 u8 l4_protocol;
1098 u8 block_mc_loopback;
1099 u8 rule_type;
1100 };
1101
1102 struct ib_mad;
1103 struct ib_grh;
1104
1105 enum ib_process_mad_flags {
1106 IB_MAD_IGNORE_MKEY = 1,
1107 IB_MAD_IGNORE_BKEY = 2,
1108 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
1109 };
1110
1111 enum ib_mad_result {
1112 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */
1113 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */
1114 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */
1115 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */
1116 };
1117
1118 #define IB_DEVICE_NAME_MAX 64
1119
1120 struct ib_cache {
1121 rwlock_t lock;
1122 struct ib_event_handler event_handler;
1123 struct ib_pkey_cache **pkey_cache;
1124 struct ib_gid_cache **gid_cache;
1125 u8 *lmc_cache;
1126 };
1127
1128 struct ib_dma_mapping_ops {
1129 int (*mapping_error)(struct ib_device *dev,
1130 u64 dma_addr);
1131 u64 (*map_single)(struct ib_device *dev,
1132 void *ptr, size_t size,
1133 enum dma_data_direction direction);
1134 void (*unmap_single)(struct ib_device *dev,
1135 u64 addr, size_t size,
1136 enum dma_data_direction direction);
1137 u64 (*map_page)(struct ib_device *dev,
1138 struct page *page, unsigned long offset,
1139 size_t size,
1140 enum dma_data_direction direction);
1141 void (*unmap_page)(struct ib_device *dev,
1142 u64 addr, size_t size,
1143 enum dma_data_direction direction);
1144 int (*map_sg)(struct ib_device *dev,
1145 struct scatterlist *sg, int nents,
1146 enum dma_data_direction direction);
1147 void (*unmap_sg)(struct ib_device *dev,
1148 struct scatterlist *sg, int nents,
1149 enum dma_data_direction direction);
1150 u64 (*dma_address)(struct ib_device *dev,
1151 struct scatterlist *sg);
1152 unsigned int (*dma_len)(struct ib_device *dev,
1153 struct scatterlist *sg);
1154 void (*sync_single_for_cpu)(struct ib_device *dev,
1155 u64 dma_handle,
1156 size_t size,
1157 enum dma_data_direction dir);
1158 void (*sync_single_for_device)(struct ib_device *dev,
1159 u64 dma_handle,
1160 size_t size,
1161 enum dma_data_direction dir);
1162 void *(*alloc_coherent)(struct ib_device *dev,
1163 size_t size,
1164 u64 *dma_handle,
1165 gfp_t flag);
1166 void (*free_coherent)(struct ib_device *dev,
1167 size_t size, void *cpu_addr,
1168 u64 dma_handle);
1169 };
1170
1171 struct iw_cm_verbs;
1172
1173 struct ib_device {
1174 struct device *dma_device;
1175
1176 char name[IB_DEVICE_NAME_MAX];
1177
1178 struct list_head event_handler_list;
1179 spinlock_t event_handler_lock;
1180
1181 spinlock_t client_data_lock;
1182 struct list_head core_list;
1183 struct list_head client_data_list;
1184
1185 struct ib_cache cache;
1186 int *pkey_tbl_len;
1187 int *gid_tbl_len;
1188
1189 int num_comp_vectors;
1190
1191 struct iw_cm_verbs *iwcm;
1192
1193 int (*get_protocol_stats)(struct ib_device *device,
1194 union rdma_protocol_stats *stats);
1195 int (*query_device)(struct ib_device *device,
1196 struct ib_device_attr *device_attr);
1197 int (*query_port)(struct ib_device *device,
1198 u8 port_num,
1199 struct ib_port_attr *port_attr);
1200 enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
1201 u8 port_num);
1202 int (*query_gid)(struct ib_device *device,
1203 u8 port_num, int index,
1204 union ib_gid *gid);
1205 int (*query_pkey)(struct ib_device *device,
1206 u8 port_num, u16 index, u16 *pkey);
1207 int (*modify_device)(struct ib_device *device,
1208 int device_modify_mask,
1209 struct ib_device_modify *device_modify);
1210 int (*modify_port)(struct ib_device *device,
1211 u8 port_num, int port_modify_mask,
1212 struct ib_port_modify *port_modify);
1213 struct ib_ucontext * (*alloc_ucontext)(struct ib_device *device,
1214 struct ib_udata *udata);
1215 int (*dealloc_ucontext)(struct ib_ucontext *context);
1216 int (*mmap)(struct ib_ucontext *context,
1217 struct vm_area_struct *vma);
1218 struct ib_pd * (*alloc_pd)(struct ib_device *device,
1219 struct ib_ucontext *context,
1220 struct ib_udata *udata);
1221 int (*dealloc_pd)(struct ib_pd *pd);
1222 struct ib_ah * (*create_ah)(struct ib_pd *pd,
1223 struct ib_ah_attr *ah_attr);
1224 int (*modify_ah)(struct ib_ah *ah,
1225 struct ib_ah_attr *ah_attr);
1226 int (*query_ah)(struct ib_ah *ah,
1227 struct ib_ah_attr *ah_attr);
1228 int (*destroy_ah)(struct ib_ah *ah);
1229 struct ib_srq * (*create_srq)(struct ib_pd *pd,
1230 struct ib_srq_init_attr *srq_init_attr,
1231 struct ib_udata *udata);
1232 int (*modify_srq)(struct ib_srq *srq,
1233 struct ib_srq_attr *srq_attr,
1234 enum ib_srq_attr_mask srq_attr_mask,
1235 struct ib_udata *udata);
1236 int (*query_srq)(struct ib_srq *srq,
1237 struct ib_srq_attr *srq_attr);
1238 int (*destroy_srq)(struct ib_srq *srq);
1239 int (*post_srq_recv)(struct ib_srq *srq,
1240 struct ib_recv_wr *recv_wr,
1241 struct ib_recv_wr **bad_recv_wr);
1242 struct ib_qp * (*create_qp)(struct ib_pd *pd,
1243 struct ib_qp_init_attr *qp_init_attr,
1244 struct ib_udata *udata);
1245 int (*modify_qp)(struct ib_qp *qp,
1246 struct ib_qp_attr *qp_attr,
1247 int qp_attr_mask,
1248 struct ib_udata *udata);
1249 int (*query_qp)(struct ib_qp *qp,
1250 struct ib_qp_attr *qp_attr,
1251 int qp_attr_mask,
1252 struct ib_qp_init_attr *qp_init_attr);
1253 int (*destroy_qp)(struct ib_qp *qp);
1254 int (*post_send)(struct ib_qp *qp,
1255 struct ib_send_wr *send_wr,
1256 struct ib_send_wr **bad_send_wr);
1257 int (*post_recv)(struct ib_qp *qp,
1258 struct ib_recv_wr *recv_wr,
1259 struct ib_recv_wr **bad_recv_wr);
1260 struct ib_cq * (*create_cq)(struct ib_device *device, int cqe,
1261 int comp_vector,
1262 struct ib_ucontext *context,
1263 struct ib_udata *udata);
1264 int (*modify_cq)(struct ib_cq *cq, u16 cq_count,
1265 u16 cq_period);
1266 int (*destroy_cq)(struct ib_cq *cq);
1267 int (*resize_cq)(struct ib_cq *cq, int cqe,
1268 struct ib_udata *udata);
1269 int (*poll_cq)(struct ib_cq *cq, int num_entries,
1270 struct ib_wc *wc);
1271 int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
1272 int (*req_notify_cq)(struct ib_cq *cq,
1273 enum ib_cq_notify_flags flags);
1274 int (*req_ncomp_notif)(struct ib_cq *cq,
1275 int wc_cnt);
1276 struct ib_mr * (*get_dma_mr)(struct ib_pd *pd,
1277 int mr_access_flags);
1278 struct ib_mr * (*reg_phys_mr)(struct ib_pd *pd,
1279 struct ib_phys_buf *phys_buf_array,
1280 int num_phys_buf,
1281 int mr_access_flags,
1282 u64 *iova_start);
1283 struct ib_mr * (*reg_user_mr)(struct ib_pd *pd,
1284 u64 start, u64 length,
1285 u64 virt_addr,
1286 int mr_access_flags,
1287 struct ib_udata *udata,
1288 int mr_id);
1289 int (*query_mr)(struct ib_mr *mr,
1290 struct ib_mr_attr *mr_attr);
1291 int (*dereg_mr)(struct ib_mr *mr);
1292 struct ib_mr * (*alloc_fast_reg_mr)(struct ib_pd *pd,
1293 int max_page_list_len);
1294 struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
1295 int page_list_len);
1296 void (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
1297 int (*rereg_phys_mr)(struct ib_mr *mr,
1298 int mr_rereg_mask,
1299 struct ib_pd *pd,
1300 struct ib_phys_buf *phys_buf_array,
1301 int num_phys_buf,
1302 int mr_access_flags,
1303 u64 *iova_start);
1304 struct ib_mw * (*alloc_mw)(struct ib_pd *pd);
1305 int (*bind_mw)(struct ib_qp *qp,
1306 struct ib_mw *mw,
1307 struct ib_mw_bind *mw_bind);
1308 int (*dealloc_mw)(struct ib_mw *mw);
1309 struct ib_fmr * (*alloc_fmr)(struct ib_pd *pd,
1310 int mr_access_flags,
1311 struct ib_fmr_attr *fmr_attr);
1312 int (*map_phys_fmr)(struct ib_fmr *fmr,
1313 u64 *page_list, int list_len,
1314 u64 iova);
1315 int (*unmap_fmr)(struct list_head *fmr_list);
1316 int (*dealloc_fmr)(struct ib_fmr *fmr);
1317 int (*attach_mcast)(struct ib_qp *qp,
1318 union ib_gid *gid,
1319 u16 lid);
1320 int (*detach_mcast)(struct ib_qp *qp,
1321 union ib_gid *gid,
1322 u16 lid);
1323 int (*process_mad)(struct ib_device *device,
1324 int process_mad_flags,
1325 u8 port_num,
1326 struct ib_wc *in_wc,
1327 struct ib_grh *in_grh,
1328 struct ib_mad *in_mad,
1329 struct ib_mad *out_mad);
1330 struct ib_srq * (*create_xrc_srq)(struct ib_pd *pd,
1331 struct ib_cq *xrc_cq,
1332 struct ib_xrcd *xrcd,
1333 struct ib_srq_init_attr *srq_init_attr,
1334 struct ib_udata *udata);
1335 struct ib_xrcd * (*alloc_xrcd)(struct ib_device *device,
1336 struct ib_ucontext *ucontext,
1337 struct ib_udata *udata);
1338 int (*dealloc_xrcd)(struct ib_xrcd *xrcd);
1339 int (*create_xrc_rcv_qp)(struct ib_qp_init_attr *init_attr,
1340 u32 *qp_num);
1341 int (*modify_xrc_rcv_qp)(struct ib_xrcd *xrcd,
1342 u32 qp_num,
1343 struct ib_qp_attr *attr,
1344 int attr_mask);
1345 int (*query_xrc_rcv_qp)(struct ib_xrcd *xrcd,
1346 u32 qp_num,
1347 struct ib_qp_attr *attr,
1348 int attr_mask,
1349 struct ib_qp_init_attr *init_attr);
1350 int (*reg_xrc_rcv_qp)(struct ib_xrcd *xrcd,
1351 void *context,
1352 u32 qp_num);
1353 int (*unreg_xrc_rcv_qp)(struct ib_xrcd *xrcd,
1354 void *context,
1355 u32 qp_num);
1356 int (*attach_flow)(struct ib_qp *qp,
1357 struct ib_flow_spec *spec,
1358 int priority);
1359 int (*detach_flow)(struct ib_qp *qp,
1360 struct ib_flow_spec *spec,
1361 int priority);
1362
1363 unsigned long (*get_unmapped_area)(struct file *file,
1364 unsigned long addr,
1365 unsigned long len, unsigned long pgoff,
1366 unsigned long flags);
1367 struct ib_dma_mapping_ops *dma_ops;
1368
1369 struct module *owner;
1370 struct device dev;
1371 struct kobject *ports_parent;
1372 struct list_head port_list;
1373
1374 enum {
1375 IB_DEV_UNINITIALIZED,
1376 IB_DEV_REGISTERED,
1377 IB_DEV_UNREGISTERED
1378 } reg_state;
1379
1380 int uverbs_abi_ver;
1381 u64 uverbs_cmd_mask;
1382
1383 char node_desc[64];
1384 __be64 node_guid;
1385 u32 local_dma_lkey;
1386 u8 node_type;
1387 u8 phys_port_cnt;
1388 struct rb_root ib_uverbs_xrcd_table;
1389 struct mutex xrcd_table_mutex;
1390 };
1391
1392 struct ib_client {
1393 char *name;
1394 void (*add) (struct ib_device *);
1395 void (*remove)(struct ib_device *);
1396
1397 struct list_head list;
1398 };
1399
1400 struct ib_device *ib_alloc_device(size_t size);
1401 void ib_dealloc_device(struct ib_device *device);
1402
1403 int ib_register_device(struct ib_device *device,
1404 int (*port_callback)(struct ib_device *,
1405 u8, struct kobject *));
1406 void ib_unregister_device(struct ib_device *device);
1407
1408 int ib_register_client (struct ib_client *client);
1409 void ib_unregister_client(struct ib_client *client);
1410
1411 void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
1412 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
1413 void *data);
1414
ib_copy_from_udata(void * dest,struct ib_udata * udata,size_t len)1415 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
1416 {
1417 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
1418 }
1419
ib_copy_to_udata(struct ib_udata * udata,void * src,size_t len)1420 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
1421 {
1422 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
1423 }
1424
1425 /**
1426 * ib_modify_qp_is_ok - Check that the supplied attribute mask
1427 * contains all required attributes and no attributes not allowed for
1428 * the given QP state transition.
1429 * @cur_state: Current QP state
1430 * @next_state: Next QP state
1431 * @type: QP type
1432 * @mask: Mask of supplied QP attributes
1433 *
1434 * This function is a helper function that a low-level driver's
1435 * modify_qp method can use to validate the consumer's input. It
1436 * checks that cur_state and next_state are valid QP states, that a
1437 * transition from cur_state to next_state is allowed by the IB spec,
1438 * and that the attribute mask supplied is allowed for the transition.
1439 */
1440 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1441 enum ib_qp_type type, enum ib_qp_attr_mask mask);
1442
1443 int ib_register_event_handler (struct ib_event_handler *event_handler);
1444 int ib_unregister_event_handler(struct ib_event_handler *event_handler);
1445 void ib_dispatch_event(struct ib_event *event);
1446
1447 int ib_query_device(struct ib_device *device,
1448 struct ib_device_attr *device_attr);
1449
1450 int ib_query_port(struct ib_device *device,
1451 u8 port_num, struct ib_port_attr *port_attr);
1452
1453 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
1454 u8 port_num);
1455
1456 int ib_query_gid(struct ib_device *device,
1457 u8 port_num, int index, union ib_gid *gid);
1458
1459 int ib_query_pkey(struct ib_device *device,
1460 u8 port_num, u16 index, u16 *pkey);
1461
1462 int ib_modify_device(struct ib_device *device,
1463 int device_modify_mask,
1464 struct ib_device_modify *device_modify);
1465
1466 int ib_modify_port(struct ib_device *device,
1467 u8 port_num, int port_modify_mask,
1468 struct ib_port_modify *port_modify);
1469
1470 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
1471 u8 *port_num, u16 *index);
1472
1473 int ib_find_pkey(struct ib_device *device,
1474 u8 port_num, u16 pkey, u16 *index);
1475
1476 /**
1477 * ib_alloc_pd - Allocates an unused protection domain.
1478 * @device: The device on which to allocate the protection domain.
1479 *
1480 * A protection domain object provides an association between QPs, shared
1481 * receive queues, address handles, memory regions, and memory windows.
1482 */
1483 struct ib_pd *ib_alloc_pd(struct ib_device *device);
1484
1485 /**
1486 * ib_dealloc_pd - Deallocates a protection domain.
1487 * @pd: The protection domain to deallocate.
1488 */
1489 int ib_dealloc_pd(struct ib_pd *pd);
1490
1491 /**
1492 * ib_create_ah - Creates an address handle for the given address vector.
1493 * @pd: The protection domain associated with the address handle.
1494 * @ah_attr: The attributes of the address vector.
1495 *
1496 * The address handle is used to reference a local or global destination
1497 * in all UD QP post sends.
1498 */
1499 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
1500
1501 /**
1502 * ib_init_ah_from_wc - Initializes address handle attributes from a
1503 * work completion.
1504 * @device: Device on which the received message arrived.
1505 * @port_num: Port on which the received message arrived.
1506 * @wc: Work completion associated with the received message.
1507 * @grh: References the received global route header. This parameter is
1508 * ignored unless the work completion indicates that the GRH is valid.
1509 * @ah_attr: Returned attributes that can be used when creating an address
1510 * handle for replying to the message.
1511 */
1512 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
1513 struct ib_grh *grh, struct ib_ah_attr *ah_attr);
1514
1515 /**
1516 * ib_create_ah_from_wc - Creates an address handle associated with the
1517 * sender of the specified work completion.
1518 * @pd: The protection domain associated with the address handle.
1519 * @wc: Work completion information associated with a received message.
1520 * @grh: References the received global route header. This parameter is
1521 * ignored unless the work completion indicates that the GRH is valid.
1522 * @port_num: The outbound port number to associate with the address.
1523 *
1524 * The address handle is used to reference a local or global destination
1525 * in all UD QP post sends.
1526 */
1527 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
1528 struct ib_grh *grh, u8 port_num);
1529
1530 /**
1531 * ib_modify_ah - Modifies the address vector associated with an address
1532 * handle.
1533 * @ah: The address handle to modify.
1534 * @ah_attr: The new address vector attributes to associate with the
1535 * address handle.
1536 */
1537 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
1538
1539 /**
1540 * ib_query_ah - Queries the address vector associated with an address
1541 * handle.
1542 * @ah: The address handle to query.
1543 * @ah_attr: The address vector attributes associated with the address
1544 * handle.
1545 */
1546 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
1547
1548 /**
1549 * ib_destroy_ah - Destroys an address handle.
1550 * @ah: The address handle to destroy.
1551 */
1552 int ib_destroy_ah(struct ib_ah *ah);
1553
1554 /**
1555 * ib_create_xrc_srq - Creates an XRC SRQ associated with the specified
1556 * protection domain, cq, and xrc domain.
1557 * @pd: The protection domain associated with the SRQ.
1558 * @xrc_cq: The cq to be associated with the XRC SRQ.
1559 * @xrcd: The XRC domain to be associated with the XRC SRQ.
1560 * @srq_init_attr: A list of initial attributes required to create the
1561 * XRC SRQ. If XRC SRQ creation succeeds, then the attributes are updated
1562 * to the actual capabilities of the created XRC SRQ.
1563 *
1564 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
1565 * requested size of the XRC SRQ, and set to the actual values allocated
1566 * on return. If ib_create_xrc_srq() succeeds, then max_wr and max_sge
1567 * will always be at least as large as the requested values.
1568 */
1569 struct ib_srq *ib_create_xrc_srq(struct ib_pd *pd,
1570 struct ib_cq *xrc_cq,
1571 struct ib_xrcd *xrcd,
1572 struct ib_srq_init_attr *srq_init_attr);
1573
1574 /**
1575 * ib_create_srq - Creates a SRQ associated with the specified protection
1576 * domain.
1577 * @pd: The protection domain associated with the SRQ.
1578 * @srq_init_attr: A list of initial attributes required to create the
1579 * SRQ. If SRQ creation succeeds, then the attributes are updated to
1580 * the actual capabilities of the created SRQ.
1581 *
1582 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
1583 * requested size of the SRQ, and set to the actual values allocated
1584 * on return. If ib_create_srq() succeeds, then max_wr and max_sge
1585 * will always be at least as large as the requested values.
1586 */
1587 struct ib_srq *ib_create_srq(struct ib_pd *pd,
1588 struct ib_srq_init_attr *srq_init_attr);
1589
1590 /**
1591 * ib_modify_srq - Modifies the attributes for the specified SRQ.
1592 * @srq: The SRQ to modify.
1593 * @srq_attr: On input, specifies the SRQ attributes to modify. On output,
1594 * the current values of selected SRQ attributes are returned.
1595 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
1596 * are being modified.
1597 *
1598 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
1599 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
1600 * the number of receives queued drops below the limit.
1601 */
1602 int ib_modify_srq(struct ib_srq *srq,
1603 struct ib_srq_attr *srq_attr,
1604 enum ib_srq_attr_mask srq_attr_mask);
1605
1606 /**
1607 * ib_query_srq - Returns the attribute list and current values for the
1608 * specified SRQ.
1609 * @srq: The SRQ to query.
1610 * @srq_attr: The attributes of the specified SRQ.
1611 */
1612 int ib_query_srq(struct ib_srq *srq,
1613 struct ib_srq_attr *srq_attr);
1614
1615 /**
1616 * ib_destroy_srq - Destroys the specified SRQ.
1617 * @srq: The SRQ to destroy.
1618 */
1619 int ib_destroy_srq(struct ib_srq *srq);
1620
1621 /**
1622 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
1623 * @srq: The SRQ to post the work request on.
1624 * @recv_wr: A list of work requests to post on the receive queue.
1625 * @bad_recv_wr: On an immediate failure, this parameter will reference
1626 * the work request that failed to be posted on the QP.
1627 */
ib_post_srq_recv(struct ib_srq * srq,struct ib_recv_wr * recv_wr,struct ib_recv_wr ** bad_recv_wr)1628 static inline int ib_post_srq_recv(struct ib_srq *srq,
1629 struct ib_recv_wr *recv_wr,
1630 struct ib_recv_wr **bad_recv_wr)
1631 {
1632 return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
1633 }
1634
1635 /**
1636 * ib_create_qp - Creates a QP associated with the specified protection
1637 * domain.
1638 * @pd: The protection domain associated with the QP.
1639 * @qp_init_attr: A list of initial attributes required to create the
1640 * QP. If QP creation succeeds, then the attributes are updated to
1641 * the actual capabilities of the created QP.
1642 */
1643 struct ib_qp *ib_create_qp(struct ib_pd *pd,
1644 struct ib_qp_init_attr *qp_init_attr);
1645
1646 /**
1647 * ib_modify_qp - Modifies the attributes for the specified QP and then
1648 * transitions the QP to the given state.
1649 * @qp: The QP to modify.
1650 * @qp_attr: On input, specifies the QP attributes to modify. On output,
1651 * the current values of selected QP attributes are returned.
1652 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
1653 * are being modified.
1654 */
1655 int ib_modify_qp(struct ib_qp *qp,
1656 struct ib_qp_attr *qp_attr,
1657 int qp_attr_mask);
1658
1659 /**
1660 * ib_query_qp - Returns the attribute list and current values for the
1661 * specified QP.
1662 * @qp: The QP to query.
1663 * @qp_attr: The attributes of the specified QP.
1664 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
1665 * @qp_init_attr: Additional attributes of the selected QP.
1666 *
1667 * The qp_attr_mask may be used to limit the query to gathering only the
1668 * selected attributes.
1669 */
1670 int ib_query_qp(struct ib_qp *qp,
1671 struct ib_qp_attr *qp_attr,
1672 int qp_attr_mask,
1673 struct ib_qp_init_attr *qp_init_attr);
1674
1675 /**
1676 * ib_destroy_qp - Destroys the specified QP.
1677 * @qp: The QP to destroy.
1678 */
1679 int ib_destroy_qp(struct ib_qp *qp);
1680
1681 /**
1682 * ib_open_qp - Obtain a reference to an existing sharable QP.
1683 * @xrcd - XRC domain
1684 * @qp_open_attr: Attributes identifying the QP to open.
1685 *
1686 * Returns a reference to a sharable QP.
1687 */
1688 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
1689 struct ib_qp_open_attr *qp_open_attr);
1690
1691 /**
1692 * ib_close_qp - Release an external reference to a QP.
1693 * @qp: The QP handle to release
1694 *
1695 * The opened QP handle is released by the caller. The underlying
1696 * shared QP is not destroyed until all internal references are released.
1697 */
1698 int ib_close_qp(struct ib_qp *qp);
1699
1700 /**
1701 * ib_post_send - Posts a list of work requests to the send queue of
1702 * the specified QP.
1703 * @qp: The QP to post the work request on.
1704 * @send_wr: A list of work requests to post on the send queue.
1705 * @bad_send_wr: On an immediate failure, this parameter will reference
1706 * the work request that failed to be posted on the QP.
1707 *
1708 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
1709 * error is returned, the QP state shall not be affected,
1710 * ib_post_send() will return an immediate error after queueing any
1711 * earlier work requests in the list.
1712 */
ib_post_send(struct ib_qp * qp,struct ib_send_wr * send_wr,struct ib_send_wr ** bad_send_wr)1713 static inline int ib_post_send(struct ib_qp *qp,
1714 struct ib_send_wr *send_wr,
1715 struct ib_send_wr **bad_send_wr)
1716 {
1717 return qp->device->post_send(qp, send_wr, bad_send_wr);
1718 }
1719
1720 /**
1721 * ib_post_recv - Posts a list of work requests to the receive queue of
1722 * the specified QP.
1723 * @qp: The QP to post the work request on.
1724 * @recv_wr: A list of work requests to post on the receive queue.
1725 * @bad_recv_wr: On an immediate failure, this parameter will reference
1726 * the work request that failed to be posted on the QP.
1727 */
ib_post_recv(struct ib_qp * qp,struct ib_recv_wr * recv_wr,struct ib_recv_wr ** bad_recv_wr)1728 static inline int ib_post_recv(struct ib_qp *qp,
1729 struct ib_recv_wr *recv_wr,
1730 struct ib_recv_wr **bad_recv_wr)
1731 {
1732 return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
1733 }
1734
1735 /*
1736 * IB_CQ_VECTOR_LEAST_ATTACHED: The constant specifies that
1737 * the CQ will be attached to the completion vector that has
1738 * the least number of CQs already attached to it.
1739 */
1740 #define IB_CQ_VECTOR_LEAST_ATTACHED 0xffffffff
1741
1742 /**
1743 * ib_create_cq - Creates a CQ on the specified device.
1744 * @device: The device on which to create the CQ.
1745 * @comp_handler: A user-specified callback that is invoked when a
1746 * completion event occurs on the CQ.
1747 * @event_handler: A user-specified callback that is invoked when an
1748 * asynchronous event not associated with a completion occurs on the CQ.
1749 * @cq_context: Context associated with the CQ returned to the user via
1750 * the associated completion and event handlers.
1751 * @cqe: The minimum size of the CQ.
1752 * @comp_vector - Completion vector used to signal completion events.
1753 * Must be >= 0 and < context->num_comp_vectors.
1754 *
1755 * Users can examine the cq structure to determine the actual CQ size.
1756 */
1757 struct ib_cq *ib_create_cq(struct ib_device *device,
1758 ib_comp_handler comp_handler,
1759 void (*event_handler)(struct ib_event *, void *),
1760 void *cq_context, int cqe, int comp_vector);
1761
1762 /**
1763 * ib_resize_cq - Modifies the capacity of the CQ.
1764 * @cq: The CQ to resize.
1765 * @cqe: The minimum size of the CQ.
1766 *
1767 * Users can examine the cq structure to determine the actual CQ size.
1768 */
1769 int ib_resize_cq(struct ib_cq *cq, int cqe);
1770
1771 /**
1772 * ib_modify_cq - Modifies moderation params of the CQ
1773 * @cq: The CQ to modify.
1774 * @cq_count: number of CQEs that will trigger an event
1775 * @cq_period: max period of time in usec before triggering an event
1776 *
1777 */
1778 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
1779
1780 /**
1781 * ib_destroy_cq - Destroys the specified CQ.
1782 * @cq: The CQ to destroy.
1783 */
1784 int ib_destroy_cq(struct ib_cq *cq);
1785
1786 /**
1787 * ib_poll_cq - poll a CQ for completion(s)
1788 * @cq:the CQ being polled
1789 * @num_entries:maximum number of completions to return
1790 * @wc:array of at least @num_entries &struct ib_wc where completions
1791 * will be returned
1792 *
1793 * Poll a CQ for (possibly multiple) completions. If the return value
1794 * is < 0, an error occurred. If the return value is >= 0, it is the
1795 * number of completions returned. If the return value is
1796 * non-negative and < num_entries, then the CQ was emptied.
1797 */
ib_poll_cq(struct ib_cq * cq,int num_entries,struct ib_wc * wc)1798 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
1799 struct ib_wc *wc)
1800 {
1801 return cq->device->poll_cq(cq, num_entries, wc);
1802 }
1803
1804 /**
1805 * ib_peek_cq - Returns the number of unreaped completions currently
1806 * on the specified CQ.
1807 * @cq: The CQ to peek.
1808 * @wc_cnt: A minimum number of unreaped completions to check for.
1809 *
1810 * If the number of unreaped completions is greater than or equal to wc_cnt,
1811 * this function returns wc_cnt, otherwise, it returns the actual number of
1812 * unreaped completions.
1813 */
1814 int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
1815
1816 /**
1817 * ib_req_notify_cq - Request completion notification on a CQ.
1818 * @cq: The CQ to generate an event for.
1819 * @flags:
1820 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
1821 * to request an event on the next solicited event or next work
1822 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
1823 * may also be |ed in to request a hint about missed events, as
1824 * described below.
1825 *
1826 * Return Value:
1827 * < 0 means an error occurred while requesting notification
1828 * == 0 means notification was requested successfully, and if
1829 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
1830 * were missed and it is safe to wait for another event. In
1831 * this case is it guaranteed that any work completions added
1832 * to the CQ since the last CQ poll will trigger a completion
1833 * notification event.
1834 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
1835 * in. It means that the consumer must poll the CQ again to
1836 * make sure it is empty to avoid missing an event because of a
1837 * race between requesting notification and an entry being
1838 * added to the CQ. This return value means it is possible
1839 * (but not guaranteed) that a work completion has been added
1840 * to the CQ since the last poll without triggering a
1841 * completion notification event.
1842 */
ib_req_notify_cq(struct ib_cq * cq,enum ib_cq_notify_flags flags)1843 static inline int ib_req_notify_cq(struct ib_cq *cq,
1844 enum ib_cq_notify_flags flags)
1845 {
1846 return cq->device->req_notify_cq(cq, flags);
1847 }
1848
1849 /**
1850 * ib_req_ncomp_notif - Request completion notification when there are
1851 * at least the specified number of unreaped completions on the CQ.
1852 * @cq: The CQ to generate an event for.
1853 * @wc_cnt: The number of unreaped completions that should be on the
1854 * CQ before an event is generated.
1855 */
ib_req_ncomp_notif(struct ib_cq * cq,int wc_cnt)1856 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
1857 {
1858 return cq->device->req_ncomp_notif ?
1859 cq->device->req_ncomp_notif(cq, wc_cnt) :
1860 -ENOSYS;
1861 }
1862
1863 /**
1864 * ib_get_dma_mr - Returns a memory region for system memory that is
1865 * usable for DMA.
1866 * @pd: The protection domain associated with the memory region.
1867 * @mr_access_flags: Specifies the memory access rights.
1868 *
1869 * Note that the ib_dma_*() functions defined below must be used
1870 * to create/destroy addresses used with the Lkey or Rkey returned
1871 * by ib_get_dma_mr().
1872 */
1873 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
1874
1875 /**
1876 * ib_dma_mapping_error - check a DMA addr for error
1877 * @dev: The device for which the dma_addr was created
1878 * @dma_addr: The DMA address to check
1879 */
ib_dma_mapping_error(struct ib_device * dev,u64 dma_addr)1880 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
1881 {
1882 if (dev->dma_ops)
1883 return dev->dma_ops->mapping_error(dev, dma_addr);
1884 return dma_mapping_error(dev->dma_device, dma_addr);
1885 }
1886
1887 /**
1888 * ib_dma_map_single - Map a kernel virtual address to DMA address
1889 * @dev: The device for which the dma_addr is to be created
1890 * @cpu_addr: The kernel virtual address
1891 * @size: The size of the region in bytes
1892 * @direction: The direction of the DMA
1893 */
ib_dma_map_single(struct ib_device * dev,void * cpu_addr,size_t size,enum dma_data_direction direction)1894 static inline u64 ib_dma_map_single(struct ib_device *dev,
1895 void *cpu_addr, size_t size,
1896 enum dma_data_direction direction)
1897 {
1898 if (dev->dma_ops)
1899 return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
1900 return dma_map_single(dev->dma_device, cpu_addr, size, direction);
1901 }
1902
1903 /**
1904 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
1905 * @dev: The device for which the DMA address was created
1906 * @addr: The DMA address
1907 * @size: The size of the region in bytes
1908 * @direction: The direction of the DMA
1909 */
ib_dma_unmap_single(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)1910 static inline void ib_dma_unmap_single(struct ib_device *dev,
1911 u64 addr, size_t size,
1912 enum dma_data_direction direction)
1913 {
1914 if (dev->dma_ops)
1915 dev->dma_ops->unmap_single(dev, addr, size, direction);
1916 else
1917 dma_unmap_single(dev->dma_device, addr, size, direction);
1918 }
1919
ib_dma_map_single_attrs(struct ib_device * dev,void * cpu_addr,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)1920 static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
1921 void *cpu_addr, size_t size,
1922 enum dma_data_direction direction,
1923 struct dma_attrs *attrs)
1924 {
1925 return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
1926 direction, attrs);
1927 }
1928
ib_dma_unmap_single_attrs(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)1929 static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
1930 u64 addr, size_t size,
1931 enum dma_data_direction direction,
1932 struct dma_attrs *attrs)
1933 {
1934 return dma_unmap_single_attrs(dev->dma_device, addr, size,
1935 direction, attrs);
1936 }
1937
1938 /**
1939 * ib_dma_map_page - Map a physical page to DMA address
1940 * @dev: The device for which the dma_addr is to be created
1941 * @page: The page to be mapped
1942 * @offset: The offset within the page
1943 * @size: The size of the region in bytes
1944 * @direction: The direction of the DMA
1945 */
ib_dma_map_page(struct ib_device * dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction)1946 static inline u64 ib_dma_map_page(struct ib_device *dev,
1947 struct page *page,
1948 unsigned long offset,
1949 size_t size,
1950 enum dma_data_direction direction)
1951 {
1952 if (dev->dma_ops)
1953 return dev->dma_ops->map_page(dev, page, offset, size, direction);
1954 return dma_map_page(dev->dma_device, page, offset, size, direction);
1955 }
1956
1957 /**
1958 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
1959 * @dev: The device for which the DMA address was created
1960 * @addr: The DMA address
1961 * @size: The size of the region in bytes
1962 * @direction: The direction of the DMA
1963 */
ib_dma_unmap_page(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)1964 static inline void ib_dma_unmap_page(struct ib_device *dev,
1965 u64 addr, size_t size,
1966 enum dma_data_direction direction)
1967 {
1968 if (dev->dma_ops)
1969 dev->dma_ops->unmap_page(dev, addr, size, direction);
1970 else
1971 dma_unmap_page(dev->dma_device, addr, size, direction);
1972 }
1973
1974 /**
1975 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
1976 * @dev: The device for which the DMA addresses are to be created
1977 * @sg: The array of scatter/gather entries
1978 * @nents: The number of scatter/gather entries
1979 * @direction: The direction of the DMA
1980 */
ib_dma_map_sg(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction)1981 static inline int ib_dma_map_sg(struct ib_device *dev,
1982 struct scatterlist *sg, int nents,
1983 enum dma_data_direction direction)
1984 {
1985 if (dev->dma_ops)
1986 return dev->dma_ops->map_sg(dev, sg, nents, direction);
1987 return dma_map_sg(dev->dma_device, sg, nents, direction);
1988 }
1989
1990 /**
1991 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
1992 * @dev: The device for which the DMA addresses were created
1993 * @sg: The array of scatter/gather entries
1994 * @nents: The number of scatter/gather entries
1995 * @direction: The direction of the DMA
1996 */
ib_dma_unmap_sg(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction)1997 static inline void ib_dma_unmap_sg(struct ib_device *dev,
1998 struct scatterlist *sg, int nents,
1999 enum dma_data_direction direction)
2000 {
2001 if (dev->dma_ops)
2002 dev->dma_ops->unmap_sg(dev, sg, nents, direction);
2003 else
2004 dma_unmap_sg(dev->dma_device, sg, nents, direction);
2005 }
2006
ib_dma_map_sg_attrs(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)2007 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
2008 struct scatterlist *sg, int nents,
2009 enum dma_data_direction direction,
2010 struct dma_attrs *attrs)
2011 {
2012 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2013 }
2014
ib_dma_unmap_sg_attrs(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)2015 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
2016 struct scatterlist *sg, int nents,
2017 enum dma_data_direction direction,
2018 struct dma_attrs *attrs)
2019 {
2020 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2021 }
2022 /**
2023 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
2024 * @dev: The device for which the DMA addresses were created
2025 * @sg: The scatter/gather entry
2026 */
ib_sg_dma_address(struct ib_device * dev,struct scatterlist * sg)2027 static inline u64 ib_sg_dma_address(struct ib_device *dev,
2028 struct scatterlist *sg)
2029 {
2030 if (dev->dma_ops)
2031 return dev->dma_ops->dma_address(dev, sg);
2032 return sg_dma_address(sg);
2033 }
2034
2035 /**
2036 * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
2037 * @dev: The device for which the DMA addresses were created
2038 * @sg: The scatter/gather entry
2039 */
ib_sg_dma_len(struct ib_device * dev,struct scatterlist * sg)2040 static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
2041 struct scatterlist *sg)
2042 {
2043 if (dev->dma_ops)
2044 return dev->dma_ops->dma_len(dev, sg);
2045 return sg_dma_len(sg);
2046 }
2047
2048 /**
2049 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
2050 * @dev: The device for which the DMA address was created
2051 * @addr: The DMA address
2052 * @size: The size of the region in bytes
2053 * @dir: The direction of the DMA
2054 */
ib_dma_sync_single_for_cpu(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)2055 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
2056 u64 addr,
2057 size_t size,
2058 enum dma_data_direction dir)
2059 {
2060 if (dev->dma_ops)
2061 dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
2062 else
2063 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2064 }
2065
2066 /**
2067 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
2068 * @dev: The device for which the DMA address was created
2069 * @addr: The DMA address
2070 * @size: The size of the region in bytes
2071 * @dir: The direction of the DMA
2072 */
ib_dma_sync_single_for_device(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)2073 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
2074 u64 addr,
2075 size_t size,
2076 enum dma_data_direction dir)
2077 {
2078 if (dev->dma_ops)
2079 dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
2080 else
2081 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2082 }
2083
2084 /**
2085 * ib_dma_alloc_coherent - Allocate memory and map it for DMA
2086 * @dev: The device for which the DMA address is requested
2087 * @size: The size of the region to allocate in bytes
2088 * @dma_handle: A pointer for returning the DMA address of the region
2089 * @flag: memory allocator flags
2090 */
ib_dma_alloc_coherent(struct ib_device * dev,size_t size,u64 * dma_handle,gfp_t flag)2091 static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
2092 size_t size,
2093 u64 *dma_handle,
2094 gfp_t flag)
2095 {
2096 if (dev->dma_ops)
2097 return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
2098 else {
2099 dma_addr_t handle;
2100 void *ret;
2101
2102 ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
2103 *dma_handle = handle;
2104 return ret;
2105 }
2106 }
2107
2108 /**
2109 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
2110 * @dev: The device for which the DMA addresses were allocated
2111 * @size: The size of the region
2112 * @cpu_addr: the address returned by ib_dma_alloc_coherent()
2113 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
2114 */
ib_dma_free_coherent(struct ib_device * dev,size_t size,void * cpu_addr,u64 dma_handle)2115 static inline void ib_dma_free_coherent(struct ib_device *dev,
2116 size_t size, void *cpu_addr,
2117 u64 dma_handle)
2118 {
2119 if (dev->dma_ops)
2120 dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
2121 else
2122 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
2123 }
2124
2125 /**
2126 * ib_reg_phys_mr - Prepares a virtually addressed memory region for use
2127 * by an HCA.
2128 * @pd: The protection domain associated assigned to the registered region.
2129 * @phys_buf_array: Specifies a list of physical buffers to use in the
2130 * memory region.
2131 * @num_phys_buf: Specifies the size of the phys_buf_array.
2132 * @mr_access_flags: Specifies the memory access rights.
2133 * @iova_start: The offset of the region's starting I/O virtual address.
2134 */
2135 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
2136 struct ib_phys_buf *phys_buf_array,
2137 int num_phys_buf,
2138 int mr_access_flags,
2139 u64 *iova_start);
2140
2141 /**
2142 * ib_rereg_phys_mr - Modifies the attributes of an existing memory region.
2143 * Conceptually, this call performs the functions deregister memory region
2144 * followed by register physical memory region. Where possible,
2145 * resources are reused instead of deallocated and reallocated.
2146 * @mr: The memory region to modify.
2147 * @mr_rereg_mask: A bit-mask used to indicate which of the following
2148 * properties of the memory region are being modified.
2149 * @pd: If %IB_MR_REREG_PD is set in mr_rereg_mask, this field specifies
2150 * the new protection domain to associated with the memory region,
2151 * otherwise, this parameter is ignored.
2152 * @phys_buf_array: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2153 * field specifies a list of physical buffers to use in the new
2154 * translation, otherwise, this parameter is ignored.
2155 * @num_phys_buf: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2156 * field specifies the size of the phys_buf_array, otherwise, this
2157 * parameter is ignored.
2158 * @mr_access_flags: If %IB_MR_REREG_ACCESS is set in mr_rereg_mask, this
2159 * field specifies the new memory access rights, otherwise, this
2160 * parameter is ignored.
2161 * @iova_start: The offset of the region's starting I/O virtual address.
2162 */
2163 int ib_rereg_phys_mr(struct ib_mr *mr,
2164 int mr_rereg_mask,
2165 struct ib_pd *pd,
2166 struct ib_phys_buf *phys_buf_array,
2167 int num_phys_buf,
2168 int mr_access_flags,
2169 u64 *iova_start);
2170
2171 /**
2172 * ib_query_mr - Retrieves information about a specific memory region.
2173 * @mr: The memory region to retrieve information about.
2174 * @mr_attr: The attributes of the specified memory region.
2175 */
2176 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
2177
2178 /**
2179 * ib_dereg_mr - Deregisters a memory region and removes it from the
2180 * HCA translation table.
2181 * @mr: The memory region to deregister.
2182 */
2183 int ib_dereg_mr(struct ib_mr *mr);
2184
2185 /**
2186 * ib_alloc_fast_reg_mr - Allocates memory region usable with the
2187 * IB_WR_FAST_REG_MR send work request.
2188 * @pd: The protection domain associated with the region.
2189 * @max_page_list_len: requested max physical buffer list length to be
2190 * used with fast register work requests for this MR.
2191 */
2192 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
2193
2194 /**
2195 * ib_alloc_fast_reg_page_list - Allocates a page list array
2196 * @device - ib device pointer.
2197 * @page_list_len - size of the page list array to be allocated.
2198 *
2199 * This allocates and returns a struct ib_fast_reg_page_list * and a
2200 * page_list array that is at least page_list_len in size. The actual
2201 * size is returned in max_page_list_len. The caller is responsible
2202 * for initializing the contents of the page_list array before posting
2203 * a send work request with the IB_WC_FAST_REG_MR opcode.
2204 *
2205 * The page_list array entries must be translated using one of the
2206 * ib_dma_*() functions just like the addresses passed to
2207 * ib_map_phys_fmr(). Once the ib_post_send() is issued, the struct
2208 * ib_fast_reg_page_list must not be modified by the caller until the
2209 * IB_WC_FAST_REG_MR work request completes.
2210 */
2211 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(
2212 struct ib_device *device, int page_list_len);
2213
2214 /**
2215 * ib_free_fast_reg_page_list - Deallocates a previously allocated
2216 * page list array.
2217 * @page_list - struct ib_fast_reg_page_list pointer to be deallocated.
2218 */
2219 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);
2220
2221 /**
2222 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
2223 * R_Key and L_Key.
2224 * @mr - struct ib_mr pointer to be updated.
2225 * @newkey - new key to be used.
2226 */
ib_update_fast_reg_key(struct ib_mr * mr,u8 newkey)2227 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
2228 {
2229 mr->lkey = (mr->lkey & 0xffffff00) | newkey;
2230 mr->rkey = (mr->rkey & 0xffffff00) | newkey;
2231 }
2232
2233 /**
2234 * ib_alloc_mw - Allocates a memory window.
2235 * @pd: The protection domain associated with the memory window.
2236 */
2237 struct ib_mw *ib_alloc_mw(struct ib_pd *pd);
2238
2239 /**
2240 * ib_bind_mw - Posts a work request to the send queue of the specified
2241 * QP, which binds the memory window to the given address range and
2242 * remote access attributes.
2243 * @qp: QP to post the bind work request on.
2244 * @mw: The memory window to bind.
2245 * @mw_bind: Specifies information about the memory window, including
2246 * its address range, remote access rights, and associated memory region.
2247 */
ib_bind_mw(struct ib_qp * qp,struct ib_mw * mw,struct ib_mw_bind * mw_bind)2248 static inline int ib_bind_mw(struct ib_qp *qp,
2249 struct ib_mw *mw,
2250 struct ib_mw_bind *mw_bind)
2251 {
2252 /* XXX reference counting in corresponding MR? */
2253 return mw->device->bind_mw ?
2254 mw->device->bind_mw(qp, mw, mw_bind) :
2255 -ENOSYS;
2256 }
2257
2258 /**
2259 * ib_dealloc_mw - Deallocates a memory window.
2260 * @mw: The memory window to deallocate.
2261 */
2262 int ib_dealloc_mw(struct ib_mw *mw);
2263
2264 /**
2265 * ib_alloc_fmr - Allocates a unmapped fast memory region.
2266 * @pd: The protection domain associated with the unmapped region.
2267 * @mr_access_flags: Specifies the memory access rights.
2268 * @fmr_attr: Attributes of the unmapped region.
2269 *
2270 * A fast memory region must be mapped before it can be used as part of
2271 * a work request.
2272 */
2273 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
2274 int mr_access_flags,
2275 struct ib_fmr_attr *fmr_attr);
2276
2277 /**
2278 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
2279 * @fmr: The fast memory region to associate with the pages.
2280 * @page_list: An array of physical pages to map to the fast memory region.
2281 * @list_len: The number of pages in page_list.
2282 * @iova: The I/O virtual address to use with the mapped region.
2283 */
ib_map_phys_fmr(struct ib_fmr * fmr,u64 * page_list,int list_len,u64 iova)2284 static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
2285 u64 *page_list, int list_len,
2286 u64 iova)
2287 {
2288 return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
2289 }
2290
2291 /**
2292 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
2293 * @fmr_list: A linked list of fast memory regions to unmap.
2294 */
2295 int ib_unmap_fmr(struct list_head *fmr_list);
2296
2297 /**
2298 * ib_dealloc_fmr - Deallocates a fast memory region.
2299 * @fmr: The fast memory region to deallocate.
2300 */
2301 int ib_dealloc_fmr(struct ib_fmr *fmr);
2302
2303 /**
2304 * ib_attach_mcast - Attaches the specified QP to a multicast group.
2305 * @qp: QP to attach to the multicast group. The QP must be type
2306 * IB_QPT_UD.
2307 * @gid: Multicast group GID.
2308 * @lid: Multicast group LID in host byte order.
2309 *
2310 * In order to send and receive multicast packets, subnet
2311 * administration must have created the multicast group and configured
2312 * the fabric appropriately. The port associated with the specified
2313 * QP must also be a member of the multicast group.
2314 */
2315 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2316
2317 /**
2318 * ib_detach_mcast - Detaches the specified QP from a multicast group.
2319 * @qp: QP to detach from the multicast group.
2320 * @gid: Multicast group GID.
2321 * @lid: Multicast group LID in host byte order.
2322 */
2323 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2324
2325 /**
2326 * ib_alloc_xrcd - Allocates an XRC domain.
2327 * @device: The device on which to allocate the XRC domain.
2328 */
2329 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
2330
2331 /**
2332 * ib_dealloc_xrcd - Deallocates an XRC domain.
2333 * @xrcd: The XRC domain to deallocate.
2334 */
2335 int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
2336
2337 int ib_attach_flow(struct ib_qp *qp, struct ib_flow_spec *spec, int priority);
2338 int ib_detach_flow(struct ib_qp *qp, struct ib_flow_spec *spec, int priority);
2339
2340 #endif /* IB_VERBS_H */
2341