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

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  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 #include <uapi/linux/if_ether.h>
 52 
 53 #include <linux/atomic.h>
 54 #include <linux/mmu_notifier.h>
 55 #include <asm/uaccess.h>
 56 
 57 extern struct workqueue_struct *ib_wq;
 58 
 59 union ib_gid {
 60         u8      raw[16];
 61         struct {
 62                 __be64  subnet_prefix;
 63                 __be64  interface_id;
 64         } global;
 65 };
 66 
 67 enum rdma_node_type {
 68         /* IB values map to NodeInfo:NodeType. */
 69         RDMA_NODE_IB_CA         = 1,
 70         RDMA_NODE_IB_SWITCH,
 71         RDMA_NODE_IB_ROUTER,
 72         RDMA_NODE_RNIC,
 73         RDMA_NODE_USNIC,
 74         RDMA_NODE_USNIC_UDP,
 75 };
 76 
 77 enum rdma_transport_type {
 78         RDMA_TRANSPORT_IB,
 79         RDMA_TRANSPORT_IWARP,
 80         RDMA_TRANSPORT_USNIC,
 81         RDMA_TRANSPORT_USNIC_UDP
 82 };
 83 
 84 __attribute_const__ enum rdma_transport_type
 85 rdma_node_get_transport(enum rdma_node_type node_type);
 86 
 87 enum rdma_link_layer {
 88         IB_LINK_LAYER_UNSPECIFIED,
 89         IB_LINK_LAYER_INFINIBAND,
 90         IB_LINK_LAYER_ETHERNET,
 91 };
 92 
 93 enum ib_device_cap_flags {
 94         IB_DEVICE_RESIZE_MAX_WR         = 1,
 95         IB_DEVICE_BAD_PKEY_CNTR         = (1<<1),
 96         IB_DEVICE_BAD_QKEY_CNTR         = (1<<2),
 97         IB_DEVICE_RAW_MULTI             = (1<<3),
 98         IB_DEVICE_AUTO_PATH_MIG         = (1<<4),
 99         IB_DEVICE_CHANGE_PHY_PORT       = (1<<5),
100         IB_DEVICE_UD_AV_PORT_ENFORCE    = (1<<6),
101         IB_DEVICE_CURR_QP_STATE_MOD     = (1<<7),
102         IB_DEVICE_SHUTDOWN_PORT         = (1<<8),
103         IB_DEVICE_INIT_TYPE             = (1<<9),
104         IB_DEVICE_PORT_ACTIVE_EVENT     = (1<<10),
105         IB_DEVICE_SYS_IMAGE_GUID        = (1<<11),
106         IB_DEVICE_RC_RNR_NAK_GEN        = (1<<12),
107         IB_DEVICE_SRQ_RESIZE            = (1<<13),
108         IB_DEVICE_N_NOTIFY_CQ           = (1<<14),
109         IB_DEVICE_LOCAL_DMA_LKEY        = (1<<15),
110         IB_DEVICE_RESERVED              = (1<<16), /* old SEND_W_INV */
111         IB_DEVICE_MEM_WINDOW            = (1<<17),
112         /*
113          * Devices should set IB_DEVICE_UD_IP_SUM if they support
114          * insertion of UDP and TCP checksum on outgoing UD IPoIB
115          * messages and can verify the validity of checksum for
116          * incoming messages.  Setting this flag implies that the
117          * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
118          */
119         IB_DEVICE_UD_IP_CSUM            = (1<<18),
120         IB_DEVICE_UD_TSO                = (1<<19),
121         IB_DEVICE_XRC                   = (1<<20),
122         IB_DEVICE_MEM_MGT_EXTENSIONS    = (1<<21),
123         IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
124         IB_DEVICE_MEM_WINDOW_TYPE_2A    = (1<<23),
125         IB_DEVICE_MEM_WINDOW_TYPE_2B    = (1<<24),
126         IB_DEVICE_MANAGED_FLOW_STEERING = (1<<29),
127         IB_DEVICE_SIGNATURE_HANDOVER    = (1<<30),
128         IB_DEVICE_ON_DEMAND_PAGING      = (1<<31),
129 };
130 
131 enum ib_signature_prot_cap {
132         IB_PROT_T10DIF_TYPE_1 = 1,
133         IB_PROT_T10DIF_TYPE_2 = 1 << 1,
134         IB_PROT_T10DIF_TYPE_3 = 1 << 2,
135 };
136 
137 enum ib_signature_guard_cap {
138         IB_GUARD_T10DIF_CRC     = 1,
139         IB_GUARD_T10DIF_CSUM    = 1 << 1,
140 };
141 
142 enum ib_atomic_cap {
143         IB_ATOMIC_NONE,
144         IB_ATOMIC_HCA,
145         IB_ATOMIC_GLOB
146 };
147 
148 enum ib_odp_general_cap_bits {
149         IB_ODP_SUPPORT = 1 << 0,
150 };
151 
152 enum ib_odp_transport_cap_bits {
153         IB_ODP_SUPPORT_SEND     = 1 << 0,
154         IB_ODP_SUPPORT_RECV     = 1 << 1,
155         IB_ODP_SUPPORT_WRITE    = 1 << 2,
156         IB_ODP_SUPPORT_READ     = 1 << 3,
157         IB_ODP_SUPPORT_ATOMIC   = 1 << 4,
158 };
159 
160 struct ib_odp_caps {
161         uint64_t general_caps;
162         struct {
163                 uint32_t  rc_odp_caps;
164                 uint32_t  uc_odp_caps;
165                 uint32_t  ud_odp_caps;
166         } per_transport_caps;
167 };
168 
169 struct ib_device_attr {
170         u64                     fw_ver;
171         __be64                  sys_image_guid;
172         u64                     max_mr_size;
173         u64                     page_size_cap;
174         u32                     vendor_id;
175         u32                     vendor_part_id;
176         u32                     hw_ver;
177         int                     max_qp;
178         int                     max_qp_wr;
179         int                     device_cap_flags;
180         int                     max_sge;
181         int                     max_sge_rd;
182         int                     max_cq;
183         int                     max_cqe;
184         int                     max_mr;
185         int                     max_pd;
186         int                     max_qp_rd_atom;
187         int                     max_ee_rd_atom;
188         int                     max_res_rd_atom;
189         int                     max_qp_init_rd_atom;
190         int                     max_ee_init_rd_atom;
191         enum ib_atomic_cap      atomic_cap;
192         enum ib_atomic_cap      masked_atomic_cap;
193         int                     max_ee;
194         int                     max_rdd;
195         int                     max_mw;
196         int                     max_raw_ipv6_qp;
197         int                     max_raw_ethy_qp;
198         int                     max_mcast_grp;
199         int                     max_mcast_qp_attach;
200         int                     max_total_mcast_qp_attach;
201         int                     max_ah;
202         int                     max_fmr;
203         int                     max_map_per_fmr;
204         int                     max_srq;
205         int                     max_srq_wr;
206         int                     max_srq_sge;
207         unsigned int            max_fast_reg_page_list_len;
208         u16                     max_pkeys;
209         u8                      local_ca_ack_delay;
210         int                     sig_prot_cap;
211         int                     sig_guard_cap;
212         struct ib_odp_caps      odp_caps;
213 };
214 
215 enum ib_mtu {
216         IB_MTU_256  = 1,
217         IB_MTU_512  = 2,
218         IB_MTU_1024 = 3,
219         IB_MTU_2048 = 4,
220         IB_MTU_4096 = 5
221 };
222 
223 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
224 {
225         switch (mtu) {
226         case IB_MTU_256:  return  256;
227         case IB_MTU_512:  return  512;
228         case IB_MTU_1024: return 1024;
229         case IB_MTU_2048: return 2048;
230         case IB_MTU_4096: return 4096;
231         default:          return -1;
232         }
233 }
234 
235 enum ib_port_state {
236         IB_PORT_NOP             = 0,
237         IB_PORT_DOWN            = 1,
238         IB_PORT_INIT            = 2,
239         IB_PORT_ARMED           = 3,
240         IB_PORT_ACTIVE          = 4,
241         IB_PORT_ACTIVE_DEFER    = 5
242 };
243 
244 enum ib_port_cap_flags {
245         IB_PORT_SM                              = 1 <<  1,
246         IB_PORT_NOTICE_SUP                      = 1 <<  2,
247         IB_PORT_TRAP_SUP                        = 1 <<  3,
248         IB_PORT_OPT_IPD_SUP                     = 1 <<  4,
249         IB_PORT_AUTO_MIGR_SUP                   = 1 <<  5,
250         IB_PORT_SL_MAP_SUP                      = 1 <<  6,
251         IB_PORT_MKEY_NVRAM                      = 1 <<  7,
252         IB_PORT_PKEY_NVRAM                      = 1 <<  8,
253         IB_PORT_LED_INFO_SUP                    = 1 <<  9,
254         IB_PORT_SM_DISABLED                     = 1 << 10,
255         IB_PORT_SYS_IMAGE_GUID_SUP              = 1 << 11,
256         IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP       = 1 << 12,
257         IB_PORT_EXTENDED_SPEEDS_SUP             = 1 << 14,
258         IB_PORT_CM_SUP                          = 1 << 16,
259         IB_PORT_SNMP_TUNNEL_SUP                 = 1 << 17,
260         IB_PORT_REINIT_SUP                      = 1 << 18,
261         IB_PORT_DEVICE_MGMT_SUP                 = 1 << 19,
262         IB_PORT_VENDOR_CLASS_SUP                = 1 << 20,
263         IB_PORT_DR_NOTICE_SUP                   = 1 << 21,
264         IB_PORT_CAP_MASK_NOTICE_SUP             = 1 << 22,
265         IB_PORT_BOOT_MGMT_SUP                   = 1 << 23,
266         IB_PORT_LINK_LATENCY_SUP                = 1 << 24,
267         IB_PORT_CLIENT_REG_SUP                  = 1 << 25,
268         IB_PORT_IP_BASED_GIDS                   = 1 << 26
269 };
270 
271 enum ib_port_width {
272         IB_WIDTH_1X     = 1,
273         IB_WIDTH_4X     = 2,
274         IB_WIDTH_8X     = 4,
275         IB_WIDTH_12X    = 8
276 };
277 
278 static inline int ib_width_enum_to_int(enum ib_port_width width)
279 {
280         switch (width) {
281         case IB_WIDTH_1X:  return  1;
282         case IB_WIDTH_4X:  return  4;
283         case IB_WIDTH_8X:  return  8;
284         case IB_WIDTH_12X: return 12;
285         default:          return -1;
286         }
287 }
288 
289 enum ib_port_speed {
290         IB_SPEED_SDR    = 1,
291         IB_SPEED_DDR    = 2,
292         IB_SPEED_QDR    = 4,
293         IB_SPEED_FDR10  = 8,
294         IB_SPEED_FDR    = 16,
295         IB_SPEED_EDR    = 32
296 };
297 
298 struct ib_protocol_stats {
299         /* TBD... */
300 };
301 
302 struct iw_protocol_stats {
303         u64     ipInReceives;
304         u64     ipInHdrErrors;
305         u64     ipInTooBigErrors;
306         u64     ipInNoRoutes;
307         u64     ipInAddrErrors;
308         u64     ipInUnknownProtos;
309         u64     ipInTruncatedPkts;
310         u64     ipInDiscards;
311         u64     ipInDelivers;
312         u64     ipOutForwDatagrams;
313         u64     ipOutRequests;
314         u64     ipOutDiscards;
315         u64     ipOutNoRoutes;
316         u64     ipReasmTimeout;
317         u64     ipReasmReqds;
318         u64     ipReasmOKs;
319         u64     ipReasmFails;
320         u64     ipFragOKs;
321         u64     ipFragFails;
322         u64     ipFragCreates;
323         u64     ipInMcastPkts;
324         u64     ipOutMcastPkts;
325         u64     ipInBcastPkts;
326         u64     ipOutBcastPkts;
327 
328         u64     tcpRtoAlgorithm;
329         u64     tcpRtoMin;
330         u64     tcpRtoMax;
331         u64     tcpMaxConn;
332         u64     tcpActiveOpens;
333         u64     tcpPassiveOpens;
334         u64     tcpAttemptFails;
335         u64     tcpEstabResets;
336         u64     tcpCurrEstab;
337         u64     tcpInSegs;
338         u64     tcpOutSegs;
339         u64     tcpRetransSegs;
340         u64     tcpInErrs;
341         u64     tcpOutRsts;
342 };
343 
344 union rdma_protocol_stats {
345         struct ib_protocol_stats        ib;
346         struct iw_protocol_stats        iw;
347 };
348 
349 struct ib_port_attr {
350         enum ib_port_state      state;
351         enum ib_mtu             max_mtu;
352         enum ib_mtu             active_mtu;
353         int                     gid_tbl_len;
354         u32                     port_cap_flags;
355         u32                     max_msg_sz;
356         u32                     bad_pkey_cntr;
357         u32                     qkey_viol_cntr;
358         u16                     pkey_tbl_len;
359         u16                     lid;
360         u16                     sm_lid;
361         u8                      lmc;
362         u8                      max_vl_num;
363         u8                      sm_sl;
364         u8                      subnet_timeout;
365         u8                      init_type_reply;
366         u8                      active_width;
367         u8                      active_speed;
368         u8                      phys_state;
369 };
370 
371 enum ib_device_modify_flags {
372         IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
373         IB_DEVICE_MODIFY_NODE_DESC      = 1 << 1
374 };
375 
376 struct ib_device_modify {
377         u64     sys_image_guid;
378         char    node_desc[64];
379 };
380 
381 enum ib_port_modify_flags {
382         IB_PORT_SHUTDOWN                = 1,
383         IB_PORT_INIT_TYPE               = (1<<2),
384         IB_PORT_RESET_QKEY_CNTR         = (1<<3)
385 };
386 
387 struct ib_port_modify {
388         u32     set_port_cap_mask;
389         u32     clr_port_cap_mask;
390         u8      init_type;
391 };
392 
393 enum ib_event_type {
394         IB_EVENT_CQ_ERR,
395         IB_EVENT_QP_FATAL,
396         IB_EVENT_QP_REQ_ERR,
397         IB_EVENT_QP_ACCESS_ERR,
398         IB_EVENT_COMM_EST,
399         IB_EVENT_SQ_DRAINED,
400         IB_EVENT_PATH_MIG,
401         IB_EVENT_PATH_MIG_ERR,
402         IB_EVENT_DEVICE_FATAL,
403         IB_EVENT_PORT_ACTIVE,
404         IB_EVENT_PORT_ERR,
405         IB_EVENT_LID_CHANGE,
406         IB_EVENT_PKEY_CHANGE,
407         IB_EVENT_SM_CHANGE,
408         IB_EVENT_SRQ_ERR,
409         IB_EVENT_SRQ_LIMIT_REACHED,
410         IB_EVENT_QP_LAST_WQE_REACHED,
411         IB_EVENT_CLIENT_REREGISTER,
412         IB_EVENT_GID_CHANGE,
413 };
414 
415 struct ib_event {
416         struct ib_device        *device;
417         union {
418                 struct ib_cq    *cq;
419                 struct ib_qp    *qp;
420                 struct ib_srq   *srq;
421                 u8              port_num;
422         } element;
423         enum ib_event_type      event;
424 };
425 
426 struct ib_event_handler {
427         struct ib_device *device;
428         void            (*handler)(struct ib_event_handler *, struct ib_event *);
429         struct list_head  list;
430 };
431 
432 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler)          \
433         do {                                                    \
434                 (_ptr)->device  = _device;                      \
435                 (_ptr)->handler = _handler;                     \
436                 INIT_LIST_HEAD(&(_ptr)->list);                  \
437         } while (0)
438 
439 struct ib_global_route {
440         union ib_gid    dgid;
441         u32             flow_label;
442         u8              sgid_index;
443         u8              hop_limit;
444         u8              traffic_class;
445 };
446 
447 struct ib_grh {
448         __be32          version_tclass_flow;
449         __be16          paylen;
450         u8              next_hdr;
451         u8              hop_limit;
452         union ib_gid    sgid;
453         union ib_gid    dgid;
454 };
455 
456 enum {
457         IB_MULTICAST_QPN = 0xffffff
458 };
459 
460 #define IB_LID_PERMISSIVE       cpu_to_be16(0xFFFF)
461 
462 enum ib_ah_flags {
463         IB_AH_GRH       = 1
464 };
465 
466 enum ib_rate {
467         IB_RATE_PORT_CURRENT = 0,
468         IB_RATE_2_5_GBPS = 2,
469         IB_RATE_5_GBPS   = 5,
470         IB_RATE_10_GBPS  = 3,
471         IB_RATE_20_GBPS  = 6,
472         IB_RATE_30_GBPS  = 4,
473         IB_RATE_40_GBPS  = 7,
474         IB_RATE_60_GBPS  = 8,
475         IB_RATE_80_GBPS  = 9,
476         IB_RATE_120_GBPS = 10,
477         IB_RATE_14_GBPS  = 11,
478         IB_RATE_56_GBPS  = 12,
479         IB_RATE_112_GBPS = 13,
480         IB_RATE_168_GBPS = 14,
481         IB_RATE_25_GBPS  = 15,
482         IB_RATE_100_GBPS = 16,
483         IB_RATE_200_GBPS = 17,
484         IB_RATE_300_GBPS = 18
485 };
486 
487 /**
488  * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
489  * base rate of 2.5 Gbit/sec.  For example, IB_RATE_5_GBPS will be
490  * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
491  * @rate: rate to convert.
492  */
493 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
494 
495 /**
496  * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
497  * For example, IB_RATE_2_5_GBPS will be converted to 2500.
498  * @rate: rate to convert.
499  */
500 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
501 
502 enum ib_mr_create_flags {
503         IB_MR_SIGNATURE_EN = 1,
504 };
505 
506 /**
507  * ib_mr_init_attr - Memory region init attributes passed to routine
508  *     ib_create_mr.
509  * @max_reg_descriptors: max number of registration descriptors that
510  *     may be used with registration work requests.
511  * @flags: MR creation flags bit mask.
512  */
513 struct ib_mr_init_attr {
514         int         max_reg_descriptors;
515         u32         flags;
516 };
517 
518 /**
519  * Signature types
520  * IB_SIG_TYPE_NONE: Unprotected.
521  * IB_SIG_TYPE_T10_DIF: Type T10-DIF
522  */
523 enum ib_signature_type {
524         IB_SIG_TYPE_NONE,
525         IB_SIG_TYPE_T10_DIF,
526 };
527 
528 /**
529  * Signature T10-DIF block-guard types
530  * IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules.
531  * IB_T10DIF_CSUM: Corresponds to IP checksum rules.
532  */
533 enum ib_t10_dif_bg_type {
534         IB_T10DIF_CRC,
535         IB_T10DIF_CSUM
536 };
537 
538 /**
539  * struct ib_t10_dif_domain - Parameters specific for T10-DIF
540  *     domain.
541  * @bg_type: T10-DIF block guard type (CRC|CSUM)
542  * @pi_interval: protection information interval.
543  * @bg: seed of guard computation.
544  * @app_tag: application tag of guard block
545  * @ref_tag: initial guard block reference tag.
546  * @ref_remap: Indicate wethear the reftag increments each block
547  * @app_escape: Indicate to skip block check if apptag=0xffff
548  * @ref_escape: Indicate to skip block check if reftag=0xffffffff
549  * @apptag_check_mask: check bitmask of application tag.
550  */
551 struct ib_t10_dif_domain {
552         enum ib_t10_dif_bg_type bg_type;
553         u16                     pi_interval;
554         u16                     bg;
555         u16                     app_tag;
556         u32                     ref_tag;
557         bool                    ref_remap;
558         bool                    app_escape;
559         bool                    ref_escape;
560         u16                     apptag_check_mask;
561 };
562 
563 /**
564  * struct ib_sig_domain - Parameters for signature domain
565  * @sig_type: specific signauture type
566  * @sig: union of all signature domain attributes that may
567  *     be used to set domain layout.
568  */
569 struct ib_sig_domain {
570         enum ib_signature_type sig_type;
571         union {
572                 struct ib_t10_dif_domain dif;
573         } sig;
574 };
575 
576 /**
577  * struct ib_sig_attrs - Parameters for signature handover operation
578  * @check_mask: bitmask for signature byte check (8 bytes)
579  * @mem: memory domain layout desciptor.
580  * @wire: wire domain layout desciptor.
581  */
582 struct ib_sig_attrs {
583         u8                      check_mask;
584         struct ib_sig_domain    mem;
585         struct ib_sig_domain    wire;
586 };
587 
588 enum ib_sig_err_type {
589         IB_SIG_BAD_GUARD,
590         IB_SIG_BAD_REFTAG,
591         IB_SIG_BAD_APPTAG,
592 };
593 
594 /**
595  * struct ib_sig_err - signature error descriptor
596  */
597 struct ib_sig_err {
598         enum ib_sig_err_type    err_type;
599         u32                     expected;
600         u32                     actual;
601         u64                     sig_err_offset;
602         u32                     key;
603 };
604 
605 enum ib_mr_status_check {
606         IB_MR_CHECK_SIG_STATUS = 1,
607 };
608 
609 /**
610  * struct ib_mr_status - Memory region status container
611  *
612  * @fail_status: Bitmask of MR checks status. For each
613  *     failed check a corresponding status bit is set.
614  * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
615  *     failure.
616  */
617 struct ib_mr_status {
618         u32                 fail_status;
619         struct ib_sig_err   sig_err;
620 };
621 
622 /**
623  * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
624  * enum.
625  * @mult: multiple to convert.
626  */
627 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult);
628 
629 struct ib_ah_attr {
630         struct ib_global_route  grh;
631         u16                     dlid;
632         u8                      sl;
633         u8                      src_path_bits;
634         u8                      static_rate;
635         u8                      ah_flags;
636         u8                      port_num;
637         u8                      dmac[ETH_ALEN];
638         u16                     vlan_id;
639 };
640 
641 enum ib_wc_status {
642         IB_WC_SUCCESS,
643         IB_WC_LOC_LEN_ERR,
644         IB_WC_LOC_QP_OP_ERR,
645         IB_WC_LOC_EEC_OP_ERR,
646         IB_WC_LOC_PROT_ERR,
647         IB_WC_WR_FLUSH_ERR,
648         IB_WC_MW_BIND_ERR,
649         IB_WC_BAD_RESP_ERR,
650         IB_WC_LOC_ACCESS_ERR,
651         IB_WC_REM_INV_REQ_ERR,
652         IB_WC_REM_ACCESS_ERR,
653         IB_WC_REM_OP_ERR,
654         IB_WC_RETRY_EXC_ERR,
655         IB_WC_RNR_RETRY_EXC_ERR,
656         IB_WC_LOC_RDD_VIOL_ERR,
657         IB_WC_REM_INV_RD_REQ_ERR,
658         IB_WC_REM_ABORT_ERR,
659         IB_WC_INV_EECN_ERR,
660         IB_WC_INV_EEC_STATE_ERR,
661         IB_WC_FATAL_ERR,
662         IB_WC_RESP_TIMEOUT_ERR,
663         IB_WC_GENERAL_ERR
664 };
665 
666 enum ib_wc_opcode {
667         IB_WC_SEND,
668         IB_WC_RDMA_WRITE,
669         IB_WC_RDMA_READ,
670         IB_WC_COMP_SWAP,
671         IB_WC_FETCH_ADD,
672         IB_WC_BIND_MW,
673         IB_WC_LSO,
674         IB_WC_LOCAL_INV,
675         IB_WC_FAST_REG_MR,
676         IB_WC_MASKED_COMP_SWAP,
677         IB_WC_MASKED_FETCH_ADD,
678 /*
679  * Set value of IB_WC_RECV so consumers can test if a completion is a
680  * receive by testing (opcode & IB_WC_RECV).
681  */
682         IB_WC_RECV                      = 1 << 7,
683         IB_WC_RECV_RDMA_WITH_IMM
684 };
685 
686 enum ib_wc_flags {
687         IB_WC_GRH               = 1,
688         IB_WC_WITH_IMM          = (1<<1),
689         IB_WC_WITH_INVALIDATE   = (1<<2),
690         IB_WC_IP_CSUM_OK        = (1<<3),
691         IB_WC_WITH_SMAC         = (1<<4),
692         IB_WC_WITH_VLAN         = (1<<5),
693 };
694 
695 struct ib_wc {
696         u64                     wr_id;
697         enum ib_wc_status       status;
698         enum ib_wc_opcode       opcode;
699         u32                     vendor_err;
700         u32                     byte_len;
701         struct ib_qp           *qp;
702         union {
703                 __be32          imm_data;
704                 u32             invalidate_rkey;
705         } ex;
706         u32                     src_qp;
707         int                     wc_flags;
708         u16                     pkey_index;
709         u16                     slid;
710         u8                      sl;
711         u8                      dlid_path_bits;
712         u8                      port_num;       /* valid only for DR SMPs on switches */
713         u8                      smac[ETH_ALEN];
714         u16                     vlan_id;
715 };
716 
717 enum ib_cq_notify_flags {
718         IB_CQ_SOLICITED                 = 1 << 0,
719         IB_CQ_NEXT_COMP                 = 1 << 1,
720         IB_CQ_SOLICITED_MASK            = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
721         IB_CQ_REPORT_MISSED_EVENTS      = 1 << 2,
722 };
723 
724 enum ib_srq_type {
725         IB_SRQT_BASIC,
726         IB_SRQT_XRC
727 };
728 
729 enum ib_srq_attr_mask {
730         IB_SRQ_MAX_WR   = 1 << 0,
731         IB_SRQ_LIMIT    = 1 << 1,
732 };
733 
734 struct ib_srq_attr {
735         u32     max_wr;
736         u32     max_sge;
737         u32     srq_limit;
738 };
739 
740 struct ib_srq_init_attr {
741         void                  (*event_handler)(struct ib_event *, void *);
742         void                   *srq_context;
743         struct ib_srq_attr      attr;
744         enum ib_srq_type        srq_type;
745 
746         union {
747                 struct {
748                         struct ib_xrcd *xrcd;
749                         struct ib_cq   *cq;
750                 } xrc;
751         } ext;
752 };
753 
754 struct ib_qp_cap {
755         u32     max_send_wr;
756         u32     max_recv_wr;
757         u32     max_send_sge;
758         u32     max_recv_sge;
759         u32     max_inline_data;
760 };
761 
762 enum ib_sig_type {
763         IB_SIGNAL_ALL_WR,
764         IB_SIGNAL_REQ_WR
765 };
766 
767 enum ib_qp_type {
768         /*
769          * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
770          * here (and in that order) since the MAD layer uses them as
771          * indices into a 2-entry table.
772          */
773         IB_QPT_SMI,
774         IB_QPT_GSI,
775 
776         IB_QPT_RC,
777         IB_QPT_UC,
778         IB_QPT_UD,
779         IB_QPT_RAW_IPV6,
780         IB_QPT_RAW_ETHERTYPE,
781         IB_QPT_RAW_PACKET = 8,
782         IB_QPT_XRC_INI = 9,
783         IB_QPT_XRC_TGT,
784         IB_QPT_MAX,
785         /* Reserve a range for qp types internal to the low level driver.
786          * These qp types will not be visible at the IB core layer, so the
787          * IB_QPT_MAX usages should not be affected in the core layer
788          */
789         IB_QPT_RESERVED1 = 0x1000,
790         IB_QPT_RESERVED2,
791         IB_QPT_RESERVED3,
792         IB_QPT_RESERVED4,
793         IB_QPT_RESERVED5,
794         IB_QPT_RESERVED6,
795         IB_QPT_RESERVED7,
796         IB_QPT_RESERVED8,
797         IB_QPT_RESERVED9,
798         IB_QPT_RESERVED10,
799 };
800 
801 enum ib_qp_create_flags {
802         IB_QP_CREATE_IPOIB_UD_LSO               = 1 << 0,
803         IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK   = 1 << 1,
804         IB_QP_CREATE_NETIF_QP                   = 1 << 5,
805         IB_QP_CREATE_SIGNATURE_EN               = 1 << 6,
806         IB_QP_CREATE_USE_GFP_NOIO               = 1 << 7,
807         /* reserve bits 26-31 for low level drivers' internal use */
808         IB_QP_CREATE_RESERVED_START             = 1 << 26,
809         IB_QP_CREATE_RESERVED_END               = 1 << 31,
810 };
811 
812 
813 /*
814  * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
815  * callback to destroy the passed in QP.
816  */
817 
818 struct ib_qp_init_attr {
819         void                  (*event_handler)(struct ib_event *, void *);
820         void                   *qp_context;
821         struct ib_cq           *send_cq;
822         struct ib_cq           *recv_cq;
823         struct ib_srq          *srq;
824         struct ib_xrcd         *xrcd;     /* XRC TGT QPs only */
825         struct ib_qp_cap        cap;
826         enum ib_sig_type        sq_sig_type;
827         enum ib_qp_type         qp_type;
828         enum ib_qp_create_flags create_flags;
829         u8                      port_num; /* special QP types only */
830 };
831 
832 struct ib_qp_open_attr {
833         void                  (*event_handler)(struct ib_event *, void *);
834         void                   *qp_context;
835         u32                     qp_num;
836         enum ib_qp_type         qp_type;
837 };
838 
839 enum ib_rnr_timeout {
840         IB_RNR_TIMER_655_36 =  0,
841         IB_RNR_TIMER_000_01 =  1,
842         IB_RNR_TIMER_000_02 =  2,
843         IB_RNR_TIMER_000_03 =  3,
844         IB_RNR_TIMER_000_04 =  4,
845         IB_RNR_TIMER_000_06 =  5,
846         IB_RNR_TIMER_000_08 =  6,
847         IB_RNR_TIMER_000_12 =  7,
848         IB_RNR_TIMER_000_16 =  8,
849         IB_RNR_TIMER_000_24 =  9,
850         IB_RNR_TIMER_000_32 = 10,
851         IB_RNR_TIMER_000_48 = 11,
852         IB_RNR_TIMER_000_64 = 12,
853         IB_RNR_TIMER_000_96 = 13,
854         IB_RNR_TIMER_001_28 = 14,
855         IB_RNR_TIMER_001_92 = 15,
856         IB_RNR_TIMER_002_56 = 16,
857         IB_RNR_TIMER_003_84 = 17,
858         IB_RNR_TIMER_005_12 = 18,
859         IB_RNR_TIMER_007_68 = 19,
860         IB_RNR_TIMER_010_24 = 20,
861         IB_RNR_TIMER_015_36 = 21,
862         IB_RNR_TIMER_020_48 = 22,
863         IB_RNR_TIMER_030_72 = 23,
864         IB_RNR_TIMER_040_96 = 24,
865         IB_RNR_TIMER_061_44 = 25,
866         IB_RNR_TIMER_081_92 = 26,
867         IB_RNR_TIMER_122_88 = 27,
868         IB_RNR_TIMER_163_84 = 28,
869         IB_RNR_TIMER_245_76 = 29,
870         IB_RNR_TIMER_327_68 = 30,
871         IB_RNR_TIMER_491_52 = 31
872 };
873 
874 enum ib_qp_attr_mask {
875         IB_QP_STATE                     = 1,
876         IB_QP_CUR_STATE                 = (1<<1),
877         IB_QP_EN_SQD_ASYNC_NOTIFY       = (1<<2),
878         IB_QP_ACCESS_FLAGS              = (1<<3),
879         IB_QP_PKEY_INDEX                = (1<<4),
880         IB_QP_PORT                      = (1<<5),
881         IB_QP_QKEY                      = (1<<6),
882         IB_QP_AV                        = (1<<7),
883         IB_QP_PATH_MTU                  = (1<<8),
884         IB_QP_TIMEOUT                   = (1<<9),
885         IB_QP_RETRY_CNT                 = (1<<10),
886         IB_QP_RNR_RETRY                 = (1<<11),
887         IB_QP_RQ_PSN                    = (1<<12),
888         IB_QP_MAX_QP_RD_ATOMIC          = (1<<13),
889         IB_QP_ALT_PATH                  = (1<<14),
890         IB_QP_MIN_RNR_TIMER             = (1<<15),
891         IB_QP_SQ_PSN                    = (1<<16),
892         IB_QP_MAX_DEST_RD_ATOMIC        = (1<<17),
893         IB_QP_PATH_MIG_STATE            = (1<<18),
894         IB_QP_CAP                       = (1<<19),
895         IB_QP_DEST_QPN                  = (1<<20),
896         IB_QP_SMAC                      = (1<<21),
897         IB_QP_ALT_SMAC                  = (1<<22),
898         IB_QP_VID                       = (1<<23),
899         IB_QP_ALT_VID                   = (1<<24),
900 };
901 
902 enum ib_qp_state {
903         IB_QPS_RESET,
904         IB_QPS_INIT,
905         IB_QPS_RTR,
906         IB_QPS_RTS,
907         IB_QPS_SQD,
908         IB_QPS_SQE,
909         IB_QPS_ERR
910 };
911 
912 enum ib_mig_state {
913         IB_MIG_MIGRATED,
914         IB_MIG_REARM,
915         IB_MIG_ARMED
916 };
917 
918 enum ib_mw_type {
919         IB_MW_TYPE_1 = 1,
920         IB_MW_TYPE_2 = 2
921 };
922 
923 struct ib_qp_attr {
924         enum ib_qp_state        qp_state;
925         enum ib_qp_state        cur_qp_state;
926         enum ib_mtu             path_mtu;
927         enum ib_mig_state       path_mig_state;
928         u32                     qkey;
929         u32                     rq_psn;
930         u32                     sq_psn;
931         u32                     dest_qp_num;
932         int                     qp_access_flags;
933         struct ib_qp_cap        cap;
934         struct ib_ah_attr       ah_attr;
935         struct ib_ah_attr       alt_ah_attr;
936         u16                     pkey_index;
937         u16                     alt_pkey_index;
938         u8                      en_sqd_async_notify;
939         u8                      sq_draining;
940         u8                      max_rd_atomic;
941         u8                      max_dest_rd_atomic;
942         u8                      min_rnr_timer;
943         u8                      port_num;
944         u8                      timeout;
945         u8                      retry_cnt;
946         u8                      rnr_retry;
947         u8                      alt_port_num;
948         u8                      alt_timeout;
949         u8                      smac[ETH_ALEN];
950         u8                      alt_smac[ETH_ALEN];
951         u16                     vlan_id;
952         u16                     alt_vlan_id;
953 };
954 
955 enum ib_wr_opcode {
956         IB_WR_RDMA_WRITE,
957         IB_WR_RDMA_WRITE_WITH_IMM,
958         IB_WR_SEND,
959         IB_WR_SEND_WITH_IMM,
960         IB_WR_RDMA_READ,
961         IB_WR_ATOMIC_CMP_AND_SWP,
962         IB_WR_ATOMIC_FETCH_AND_ADD,
963         IB_WR_LSO,
964         IB_WR_SEND_WITH_INV,
965         IB_WR_RDMA_READ_WITH_INV,
966         IB_WR_LOCAL_INV,
967         IB_WR_FAST_REG_MR,
968         IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
969         IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
970         IB_WR_BIND_MW,
971         IB_WR_REG_SIG_MR,
972         /* reserve values for low level drivers' internal use.
973          * These values will not be used at all in the ib core layer.
974          */
975         IB_WR_RESERVED1 = 0xf0,
976         IB_WR_RESERVED2,
977         IB_WR_RESERVED3,
978         IB_WR_RESERVED4,
979         IB_WR_RESERVED5,
980         IB_WR_RESERVED6,
981         IB_WR_RESERVED7,
982         IB_WR_RESERVED8,
983         IB_WR_RESERVED9,
984         IB_WR_RESERVED10,
985 };
986 
987 enum ib_send_flags {
988         IB_SEND_FENCE           = 1,
989         IB_SEND_SIGNALED        = (1<<1),
990         IB_SEND_SOLICITED       = (1<<2),
991         IB_SEND_INLINE          = (1<<3),
992         IB_SEND_IP_CSUM         = (1<<4),
993 
994         /* reserve bits 26-31 for low level drivers' internal use */
995         IB_SEND_RESERVED_START  = (1 << 26),
996         IB_SEND_RESERVED_END    = (1 << 31),
997 };
998 
999 struct ib_sge {
1000         u64     addr;
1001         u32     length;
1002         u32     lkey;
1003 };
1004 
1005 struct ib_fast_reg_page_list {
1006         struct ib_device       *device;
1007         u64                    *page_list;
1008         unsigned int            max_page_list_len;
1009 };
1010 
1011 /**
1012  * struct ib_mw_bind_info - Parameters for a memory window bind operation.
1013  * @mr: A memory region to bind the memory window to.
1014  * @addr: The address where the memory window should begin.
1015  * @length: The length of the memory window, in bytes.
1016  * @mw_access_flags: Access flags from enum ib_access_flags for the window.
1017  *
1018  * This struct contains the shared parameters for type 1 and type 2
1019  * memory window bind operations.
1020  */
1021 struct ib_mw_bind_info {
1022         struct ib_mr   *mr;
1023         u64             addr;
1024         u64             length;
1025         int             mw_access_flags;
1026 };
1027 
1028 struct ib_send_wr {
1029         struct ib_send_wr      *next;
1030         u64                     wr_id;
1031         struct ib_sge          *sg_list;
1032         int                     num_sge;
1033         enum ib_wr_opcode       opcode;
1034         int                     send_flags;
1035         union {
1036                 __be32          imm_data;
1037                 u32             invalidate_rkey;
1038         } ex;
1039         union {
1040                 struct {
1041                         u64     remote_addr;
1042                         u32     rkey;
1043                 } rdma;
1044                 struct {
1045                         u64     remote_addr;
1046                         u64     compare_add;
1047                         u64     swap;
1048                         u64     compare_add_mask;
1049                         u64     swap_mask;
1050                         u32     rkey;
1051                 } atomic;
1052                 struct {
1053                         struct ib_ah *ah;
1054                         void   *header;
1055                         int     hlen;
1056                         int     mss;
1057                         u32     remote_qpn;
1058                         u32     remote_qkey;
1059                         u16     pkey_index; /* valid for GSI only */
1060                         u8      port_num;   /* valid for DR SMPs on switch only */
1061                 } ud;
1062                 struct {
1063                         u64                             iova_start;
1064                         struct ib_fast_reg_page_list   *page_list;
1065                         unsigned int                    page_shift;
1066                         unsigned int                    page_list_len;
1067                         u32                             length;
1068                         int                             access_flags;
1069                         u32                             rkey;
1070                 } fast_reg;
1071                 struct {
1072                         struct ib_mw            *mw;
1073                         /* The new rkey for the memory window. */
1074                         u32                      rkey;
1075                         struct ib_mw_bind_info   bind_info;
1076                 } bind_mw;
1077                 struct {
1078                         struct ib_sig_attrs    *sig_attrs;
1079                         struct ib_mr           *sig_mr;
1080                         int                     access_flags;
1081                         struct ib_sge          *prot;
1082                 } sig_handover;
1083         } wr;
1084         u32                     xrc_remote_srq_num;     /* XRC TGT QPs only */
1085 };
1086 
1087 struct ib_recv_wr {
1088         struct ib_recv_wr      *next;
1089         u64                     wr_id;
1090         struct ib_sge          *sg_list;
1091         int                     num_sge;
1092 };
1093 
1094 enum ib_access_flags {
1095         IB_ACCESS_LOCAL_WRITE   = 1,
1096         IB_ACCESS_REMOTE_WRITE  = (1<<1),
1097         IB_ACCESS_REMOTE_READ   = (1<<2),
1098         IB_ACCESS_REMOTE_ATOMIC = (1<<3),
1099         IB_ACCESS_MW_BIND       = (1<<4),
1100         IB_ZERO_BASED           = (1<<5),
1101         IB_ACCESS_ON_DEMAND     = (1<<6),
1102 };
1103 
1104 struct ib_phys_buf {
1105         u64      addr;
1106         u64      size;
1107 };
1108 
1109 struct ib_mr_attr {
1110         struct ib_pd    *pd;
1111         u64             device_virt_addr;
1112         u64             size;
1113         int             mr_access_flags;
1114         u32             lkey;
1115         u32             rkey;
1116 };
1117 
1118 enum ib_mr_rereg_flags {
1119         IB_MR_REREG_TRANS       = 1,
1120         IB_MR_REREG_PD          = (1<<1),
1121         IB_MR_REREG_ACCESS      = (1<<2),
1122         IB_MR_REREG_SUPPORTED   = ((IB_MR_REREG_ACCESS << 1) - 1)
1123 };
1124 
1125 /**
1126  * struct ib_mw_bind - Parameters for a type 1 memory window bind operation.
1127  * @wr_id:      Work request id.
1128  * @send_flags: Flags from ib_send_flags enum.
1129  * @bind_info:  More parameters of the bind operation.
1130  */
1131 struct ib_mw_bind {
1132         u64                    wr_id;
1133         int                    send_flags;
1134         struct ib_mw_bind_info bind_info;
1135 };
1136 
1137 struct ib_fmr_attr {
1138         int     max_pages;
1139         int     max_maps;
1140         u8      page_shift;
1141 };
1142 
1143 struct ib_umem;
1144 
1145 struct ib_ucontext {
1146         struct ib_device       *device;
1147         struct list_head        pd_list;
1148         struct list_head        mr_list;
1149         struct list_head        mw_list;
1150         struct list_head        cq_list;
1151         struct list_head        qp_list;
1152         struct list_head        srq_list;
1153         struct list_head        ah_list;
1154         struct list_head        xrcd_list;
1155         struct list_head        rule_list;
1156         int                     closing;
1157 
1158         struct pid             *tgid;
1159 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
1160         struct rb_root      umem_tree;
1161         /*
1162          * Protects .umem_rbroot and tree, as well as odp_mrs_count and
1163          * mmu notifiers registration.
1164          */
1165         struct rw_semaphore     umem_rwsem;
1166         void (*invalidate_range)(struct ib_umem *umem,
1167                                  unsigned long start, unsigned long end);
1168 
1169         struct mmu_notifier     mn;
1170         atomic_t                notifier_count;
1171         /* A list of umems that don't have private mmu notifier counters yet. */
1172         struct list_head        no_private_counters;
1173         int                     odp_mrs_count;
1174 #endif
1175 };
1176 
1177 struct ib_uobject {
1178         u64                     user_handle;    /* handle given to us by userspace */
1179         struct ib_ucontext     *context;        /* associated user context */
1180         void                   *object;         /* containing object */
1181         struct list_head        list;           /* link to context's list */
1182         int                     id;             /* index into kernel idr */
1183         struct kref             ref;
1184         struct rw_semaphore     mutex;          /* protects .live */
1185         int                     live;
1186 };
1187 
1188 struct ib_udata {
1189         const void __user *inbuf;
1190         void __user *outbuf;
1191         size_t       inlen;
1192         size_t       outlen;
1193 };
1194 
1195 struct ib_pd {
1196         struct ib_device       *device;
1197         struct ib_uobject      *uobject;
1198         atomic_t                usecnt; /* count all resources */
1199 };
1200 
1201 struct ib_xrcd {
1202         struct ib_device       *device;
1203         atomic_t                usecnt; /* count all exposed resources */
1204         struct inode           *inode;
1205 
1206         struct mutex            tgt_qp_mutex;
1207         struct list_head        tgt_qp_list;
1208 };
1209 
1210 struct ib_ah {
1211         struct ib_device        *device;
1212         struct ib_pd            *pd;
1213         struct ib_uobject       *uobject;
1214 };
1215 
1216 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1217 
1218 struct ib_cq {
1219         struct ib_device       *device;
1220         struct ib_uobject      *uobject;
1221         ib_comp_handler         comp_handler;
1222         void                  (*event_handler)(struct ib_event *, void *);
1223         void                   *cq_context;
1224         int                     cqe;
1225         atomic_t                usecnt; /* count number of work queues */
1226 };
1227 
1228 struct ib_srq {
1229         struct ib_device       *device;
1230         struct ib_pd           *pd;
1231         struct ib_uobject      *uobject;
1232         void                  (*event_handler)(struct ib_event *, void *);
1233         void                   *srq_context;
1234         enum ib_srq_type        srq_type;
1235         atomic_t                usecnt;
1236 
1237         union {
1238                 struct {
1239                         struct ib_xrcd *xrcd;
1240                         struct ib_cq   *cq;
1241                         u32             srq_num;
1242                 } xrc;
1243         } ext;
1244 };
1245 
1246 struct ib_qp {
1247         struct ib_device       *device;
1248         struct ib_pd           *pd;
1249         struct ib_cq           *send_cq;
1250         struct ib_cq           *recv_cq;
1251         struct ib_srq          *srq;
1252         struct ib_xrcd         *xrcd; /* XRC TGT QPs only */
1253         struct list_head        xrcd_list;
1254         /* count times opened, mcast attaches, flow attaches */
1255         atomic_t                usecnt;
1256         struct list_head        open_list;
1257         struct ib_qp           *real_qp;
1258         struct ib_uobject      *uobject;
1259         void                  (*event_handler)(struct ib_event *, void *);
1260         void                   *qp_context;
1261         u32                     qp_num;
1262         enum ib_qp_type         qp_type;
1263 };
1264 
1265 struct ib_mr {
1266         struct ib_device  *device;
1267         struct ib_pd      *pd;
1268         struct ib_uobject *uobject;
1269         u32                lkey;
1270         u32                rkey;
1271         atomic_t           usecnt; /* count number of MWs */
1272 };
1273 
1274 struct ib_mw {
1275         struct ib_device        *device;
1276         struct ib_pd            *pd;
1277         struct ib_uobject       *uobject;
1278         u32                     rkey;
1279         enum ib_mw_type         type;
1280 };
1281 
1282 struct ib_fmr {
1283         struct ib_device        *device;
1284         struct ib_pd            *pd;
1285         struct list_head        list;
1286         u32                     lkey;
1287         u32                     rkey;
1288 };
1289 
1290 /* Supported steering options */
1291 enum ib_flow_attr_type {
1292         /* steering according to rule specifications */
1293         IB_FLOW_ATTR_NORMAL             = 0x0,
1294         /* default unicast and multicast rule -
1295          * receive all Eth traffic which isn't steered to any QP
1296          */
1297         IB_FLOW_ATTR_ALL_DEFAULT        = 0x1,
1298         /* default multicast rule -
1299          * receive all Eth multicast traffic which isn't steered to any QP
1300          */
1301         IB_FLOW_ATTR_MC_DEFAULT         = 0x2,
1302         /* sniffer rule - receive all port traffic */
1303         IB_FLOW_ATTR_SNIFFER            = 0x3
1304 };
1305 
1306 /* Supported steering header types */
1307 enum ib_flow_spec_type {
1308         /* L2 headers*/
1309         IB_FLOW_SPEC_ETH        = 0x20,
1310         IB_FLOW_SPEC_IB         = 0x22,
1311         /* L3 header*/
1312         IB_FLOW_SPEC_IPV4       = 0x30,
1313         /* L4 headers*/
1314         IB_FLOW_SPEC_TCP        = 0x40,
1315         IB_FLOW_SPEC_UDP        = 0x41
1316 };
1317 #define IB_FLOW_SPEC_LAYER_MASK 0xF0
1318 #define IB_FLOW_SPEC_SUPPORT_LAYERS 4
1319 
1320 /* Flow steering rule priority is set according to it's domain.
1321  * Lower domain value means higher priority.
1322  */
1323 enum ib_flow_domain {
1324         IB_FLOW_DOMAIN_USER,
1325         IB_FLOW_DOMAIN_ETHTOOL,
1326         IB_FLOW_DOMAIN_RFS,
1327         IB_FLOW_DOMAIN_NIC,
1328         IB_FLOW_DOMAIN_NUM /* Must be last */
1329 };
1330 
1331 struct ib_flow_eth_filter {
1332         u8      dst_mac[6];
1333         u8      src_mac[6];
1334         __be16  ether_type;
1335         __be16  vlan_tag;
1336 };
1337 
1338 struct ib_flow_spec_eth {
1339         enum ib_flow_spec_type    type;
1340         u16                       size;
1341         struct ib_flow_eth_filter val;
1342         struct ib_flow_eth_filter mask;
1343 };
1344 
1345 struct ib_flow_ib_filter {
1346         __be16 dlid;
1347         __u8   sl;
1348 };
1349 
1350 struct ib_flow_spec_ib {
1351         enum ib_flow_spec_type   type;
1352         u16                      size;
1353         struct ib_flow_ib_filter val;
1354         struct ib_flow_ib_filter mask;
1355 };
1356 
1357 struct ib_flow_ipv4_filter {
1358         __be32  src_ip;
1359         __be32  dst_ip;
1360 };
1361 
1362 struct ib_flow_spec_ipv4 {
1363         enum ib_flow_spec_type     type;
1364         u16                        size;
1365         struct ib_flow_ipv4_filter val;
1366         struct ib_flow_ipv4_filter mask;
1367 };
1368 
1369 struct ib_flow_tcp_udp_filter {
1370         __be16  dst_port;
1371         __be16  src_port;
1372 };
1373 
1374 struct ib_flow_spec_tcp_udp {
1375         enum ib_flow_spec_type        type;
1376         u16                           size;
1377         struct ib_flow_tcp_udp_filter val;
1378         struct ib_flow_tcp_udp_filter mask;
1379 };
1380 
1381 union ib_flow_spec {
1382         struct {
1383                 enum ib_flow_spec_type  type;
1384                 u16                     size;
1385         };
1386         struct ib_flow_spec_eth         eth;
1387         struct ib_flow_spec_ib          ib;
1388         struct ib_flow_spec_ipv4        ipv4;
1389         struct ib_flow_spec_tcp_udp     tcp_udp;
1390 };
1391 
1392 struct ib_flow_attr {
1393         enum ib_flow_attr_type type;
1394         u16          size;
1395         u16          priority;
1396         u32          flags;
1397         u8           num_of_specs;
1398         u8           port;
1399         /* Following are the optional layers according to user request
1400          * struct ib_flow_spec_xxx
1401          * struct ib_flow_spec_yyy
1402          */
1403 };
1404 
1405 struct ib_flow {
1406         struct ib_qp            *qp;
1407         struct ib_uobject       *uobject;
1408 };
1409 
1410 struct ib_mad;
1411 struct ib_grh;
1412 
1413 enum ib_process_mad_flags {
1414         IB_MAD_IGNORE_MKEY      = 1,
1415         IB_MAD_IGNORE_BKEY      = 2,
1416         IB_MAD_IGNORE_ALL       = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
1417 };
1418 
1419 enum ib_mad_result {
1420         IB_MAD_RESULT_FAILURE  = 0,      /* (!SUCCESS is the important flag) */
1421         IB_MAD_RESULT_SUCCESS  = 1 << 0, /* MAD was successfully processed   */
1422         IB_MAD_RESULT_REPLY    = 1 << 1, /* Reply packet needs to be sent    */
1423         IB_MAD_RESULT_CONSUMED = 1 << 2  /* Packet consumed: stop processing */
1424 };
1425 
1426 #define IB_DEVICE_NAME_MAX 64
1427 
1428 struct ib_cache {
1429         rwlock_t                lock;
1430         struct ib_event_handler event_handler;
1431         struct ib_pkey_cache  **pkey_cache;
1432         struct ib_gid_cache   **gid_cache;
1433         u8                     *lmc_cache;
1434 };
1435 
1436 struct ib_dma_mapping_ops {
1437         int             (*mapping_error)(struct ib_device *dev,
1438                                          u64 dma_addr);
1439         u64             (*map_single)(struct ib_device *dev,
1440                                       void *ptr, size_t size,
1441                                       enum dma_data_direction direction);
1442         void            (*unmap_single)(struct ib_device *dev,
1443                                         u64 addr, size_t size,
1444                                         enum dma_data_direction direction);
1445         u64             (*map_page)(struct ib_device *dev,
1446                                     struct page *page, unsigned long offset,
1447                                     size_t size,
1448                                     enum dma_data_direction direction);
1449         void            (*unmap_page)(struct ib_device *dev,
1450                                       u64 addr, size_t size,
1451                                       enum dma_data_direction direction);
1452         int             (*map_sg)(struct ib_device *dev,
1453                                   struct scatterlist *sg, int nents,
1454                                   enum dma_data_direction direction);
1455         void            (*unmap_sg)(struct ib_device *dev,
1456                                     struct scatterlist *sg, int nents,
1457                                     enum dma_data_direction direction);
1458         void            (*sync_single_for_cpu)(struct ib_device *dev,
1459                                                u64 dma_handle,
1460                                                size_t size,
1461                                                enum dma_data_direction dir);
1462         void            (*sync_single_for_device)(struct ib_device *dev,
1463                                                   u64 dma_handle,
1464                                                   size_t size,
1465                                                   enum dma_data_direction dir);
1466         void            *(*alloc_coherent)(struct ib_device *dev,
1467                                            size_t size,
1468                                            u64 *dma_handle,
1469                                            gfp_t flag);
1470         void            (*free_coherent)(struct ib_device *dev,
1471                                          size_t size, void *cpu_addr,
1472                                          u64 dma_handle);
1473 };
1474 
1475 struct iw_cm_verbs;
1476 
1477 struct ib_device {
1478         struct device                *dma_device;
1479 
1480         char                          name[IB_DEVICE_NAME_MAX];
1481 
1482         struct list_head              event_handler_list;
1483         spinlock_t                    event_handler_lock;
1484 
1485         spinlock_t                    client_data_lock;
1486         struct list_head              core_list;
1487         struct list_head              client_data_list;
1488 
1489         struct ib_cache               cache;
1490         int                          *pkey_tbl_len;
1491         int                          *gid_tbl_len;
1492 
1493         int                           num_comp_vectors;
1494 
1495         struct iw_cm_verbs           *iwcm;
1496 
1497         int                        (*get_protocol_stats)(struct ib_device *device,
1498                                                          union rdma_protocol_stats *stats);
1499         int                        (*query_device)(struct ib_device *device,
1500                                                    struct ib_device_attr *device_attr);
1501         int                        (*query_port)(struct ib_device *device,
1502                                                  u8 port_num,
1503                                                  struct ib_port_attr *port_attr);
1504         enum rdma_link_layer       (*get_link_layer)(struct ib_device *device,
1505                                                      u8 port_num);
1506         int                        (*query_gid)(struct ib_device *device,
1507                                                 u8 port_num, int index,
1508                                                 union ib_gid *gid);
1509         int                        (*query_pkey)(struct ib_device *device,
1510                                                  u8 port_num, u16 index, u16 *pkey);
1511         int                        (*modify_device)(struct ib_device *device,
1512                                                     int device_modify_mask,
1513                                                     struct ib_device_modify *device_modify);
1514         int                        (*modify_port)(struct ib_device *device,
1515                                                   u8 port_num, int port_modify_mask,
1516                                                   struct ib_port_modify *port_modify);
1517         struct ib_ucontext *       (*alloc_ucontext)(struct ib_device *device,
1518                                                      struct ib_udata *udata);
1519         int                        (*dealloc_ucontext)(struct ib_ucontext *context);
1520         int                        (*mmap)(struct ib_ucontext *context,
1521                                            struct vm_area_struct *vma);
1522         struct ib_pd *             (*alloc_pd)(struct ib_device *device,
1523                                                struct ib_ucontext *context,
1524                                                struct ib_udata *udata);
1525         int                        (*dealloc_pd)(struct ib_pd *pd);
1526         struct ib_ah *             (*create_ah)(struct ib_pd *pd,
1527                                                 struct ib_ah_attr *ah_attr);
1528         int                        (*modify_ah)(struct ib_ah *ah,
1529                                                 struct ib_ah_attr *ah_attr);
1530         int                        (*query_ah)(struct ib_ah *ah,
1531                                                struct ib_ah_attr *ah_attr);
1532         int                        (*destroy_ah)(struct ib_ah *ah);
1533         struct ib_srq *            (*create_srq)(struct ib_pd *pd,
1534                                                  struct ib_srq_init_attr *srq_init_attr,
1535                                                  struct ib_udata *udata);
1536         int                        (*modify_srq)(struct ib_srq *srq,
1537                                                  struct ib_srq_attr *srq_attr,
1538                                                  enum ib_srq_attr_mask srq_attr_mask,
1539                                                  struct ib_udata *udata);
1540         int                        (*query_srq)(struct ib_srq *srq,
1541                                                 struct ib_srq_attr *srq_attr);
1542         int                        (*destroy_srq)(struct ib_srq *srq);
1543         int                        (*post_srq_recv)(struct ib_srq *srq,
1544                                                     struct ib_recv_wr *recv_wr,
1545                                                     struct ib_recv_wr **bad_recv_wr);
1546         struct ib_qp *             (*create_qp)(struct ib_pd *pd,
1547                                                 struct ib_qp_init_attr *qp_init_attr,
1548                                                 struct ib_udata *udata);
1549         int                        (*modify_qp)(struct ib_qp *qp,
1550                                                 struct ib_qp_attr *qp_attr,
1551                                                 int qp_attr_mask,
1552                                                 struct ib_udata *udata);
1553         int                        (*query_qp)(struct ib_qp *qp,
1554                                                struct ib_qp_attr *qp_attr,
1555                                                int qp_attr_mask,
1556                                                struct ib_qp_init_attr *qp_init_attr);
1557         int                        (*destroy_qp)(struct ib_qp *qp);
1558         int                        (*post_send)(struct ib_qp *qp,
1559                                                 struct ib_send_wr *send_wr,
1560                                                 struct ib_send_wr **bad_send_wr);
1561         int                        (*post_recv)(struct ib_qp *qp,
1562                                                 struct ib_recv_wr *recv_wr,
1563                                                 struct ib_recv_wr **bad_recv_wr);
1564         struct ib_cq *             (*create_cq)(struct ib_device *device, int cqe,
1565                                                 int comp_vector,
1566                                                 struct ib_ucontext *context,
1567                                                 struct ib_udata *udata);
1568         int                        (*modify_cq)(struct ib_cq *cq, u16 cq_count,
1569                                                 u16 cq_period);
1570         int                        (*destroy_cq)(struct ib_cq *cq);
1571         int                        (*resize_cq)(struct ib_cq *cq, int cqe,
1572                                                 struct ib_udata *udata);
1573         int                        (*poll_cq)(struct ib_cq *cq, int num_entries,
1574                                               struct ib_wc *wc);
1575         int                        (*peek_cq)(struct ib_cq *cq, int wc_cnt);
1576         int                        (*req_notify_cq)(struct ib_cq *cq,
1577                                                     enum ib_cq_notify_flags flags);
1578         int                        (*req_ncomp_notif)(struct ib_cq *cq,
1579                                                       int wc_cnt);
1580         struct ib_mr *             (*get_dma_mr)(struct ib_pd *pd,
1581                                                  int mr_access_flags);
1582         struct ib_mr *             (*reg_phys_mr)(struct ib_pd *pd,
1583                                                   struct ib_phys_buf *phys_buf_array,
1584                                                   int num_phys_buf,
1585                                                   int mr_access_flags,
1586                                                   u64 *iova_start);
1587         struct ib_mr *             (*reg_user_mr)(struct ib_pd *pd,
1588                                                   u64 start, u64 length,
1589                                                   u64 virt_addr,
1590                                                   int mr_access_flags,
1591                                                   struct ib_udata *udata);
1592         int                        (*rereg_user_mr)(struct ib_mr *mr,
1593                                                     int flags,
1594                                                     u64 start, u64 length,
1595                                                     u64 virt_addr,
1596                                                     int mr_access_flags,
1597                                                     struct ib_pd *pd,
1598                                                     struct ib_udata *udata);
1599         int                        (*query_mr)(struct ib_mr *mr,
1600                                                struct ib_mr_attr *mr_attr);
1601         int                        (*dereg_mr)(struct ib_mr *mr);
1602         int                        (*destroy_mr)(struct ib_mr *mr);
1603         struct ib_mr *             (*create_mr)(struct ib_pd *pd,
1604                                                 struct ib_mr_init_attr *mr_init_attr);
1605         struct ib_mr *             (*alloc_fast_reg_mr)(struct ib_pd *pd,
1606                                                int max_page_list_len);
1607         struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
1608                                                                    int page_list_len);
1609         void                       (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
1610         int                        (*rereg_phys_mr)(struct ib_mr *mr,
1611                                                     int mr_rereg_mask,
1612                                                     struct ib_pd *pd,
1613                                                     struct ib_phys_buf *phys_buf_array,
1614                                                     int num_phys_buf,
1615                                                     int mr_access_flags,
1616                                                     u64 *iova_start);
1617         struct ib_mw *             (*alloc_mw)(struct ib_pd *pd,
1618                                                enum ib_mw_type type);
1619         int                        (*bind_mw)(struct ib_qp *qp,
1620                                               struct ib_mw *mw,
1621                                               struct ib_mw_bind *mw_bind);
1622         int                        (*dealloc_mw)(struct ib_mw *mw);
1623         struct ib_fmr *            (*alloc_fmr)(struct ib_pd *pd,
1624                                                 int mr_access_flags,
1625                                                 struct ib_fmr_attr *fmr_attr);
1626         int                        (*map_phys_fmr)(struct ib_fmr *fmr,
1627                                                    u64 *page_list, int list_len,
1628                                                    u64 iova);
1629         int                        (*unmap_fmr)(struct list_head *fmr_list);
1630         int                        (*dealloc_fmr)(struct ib_fmr *fmr);
1631         int                        (*attach_mcast)(struct ib_qp *qp,
1632                                                    union ib_gid *gid,
1633                                                    u16 lid);
1634         int                        (*detach_mcast)(struct ib_qp *qp,
1635                                                    union ib_gid *gid,
1636                                                    u16 lid);
1637         int                        (*process_mad)(struct ib_device *device,
1638                                                   int process_mad_flags,
1639                                                   u8 port_num,
1640                                                   struct ib_wc *in_wc,
1641                                                   struct ib_grh *in_grh,
1642                                                   struct ib_mad *in_mad,
1643                                                   struct ib_mad *out_mad);
1644         struct ib_xrcd *           (*alloc_xrcd)(struct ib_device *device,
1645                                                  struct ib_ucontext *ucontext,
1646                                                  struct ib_udata *udata);
1647         int                        (*dealloc_xrcd)(struct ib_xrcd *xrcd);
1648         struct ib_flow *           (*create_flow)(struct ib_qp *qp,
1649                                                   struct ib_flow_attr
1650                                                   *flow_attr,
1651                                                   int domain);
1652         int                        (*destroy_flow)(struct ib_flow *flow_id);
1653         int                        (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
1654                                                       struct ib_mr_status *mr_status);
1655 
1656         struct ib_dma_mapping_ops   *dma_ops;
1657 
1658         struct module               *owner;
1659         struct device                dev;
1660         struct kobject               *ports_parent;
1661         struct list_head             port_list;
1662 
1663         enum {
1664                 IB_DEV_UNINITIALIZED,
1665                 IB_DEV_REGISTERED,
1666                 IB_DEV_UNREGISTERED
1667         }                            reg_state;
1668 
1669         int                          uverbs_abi_ver;
1670         u64                          uverbs_cmd_mask;
1671         u64                          uverbs_ex_cmd_mask;
1672 
1673         char                         node_desc[64];
1674         __be64                       node_guid;
1675         u32                          local_dma_lkey;
1676         u8                           node_type;
1677         u8                           phys_port_cnt;
1678 };
1679 
1680 struct ib_client {
1681         char  *name;
1682         void (*add)   (struct ib_device *);
1683         void (*remove)(struct ib_device *);
1684 
1685         struct list_head list;
1686 };
1687 
1688 struct ib_device *ib_alloc_device(size_t size);
1689 void ib_dealloc_device(struct ib_device *device);
1690 
1691 int ib_register_device(struct ib_device *device,
1692                        int (*port_callback)(struct ib_device *,
1693                                             u8, struct kobject *));
1694 void ib_unregister_device(struct ib_device *device);
1695 
1696 int ib_register_client   (struct ib_client *client);
1697 void ib_unregister_client(struct ib_client *client);
1698 
1699 void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
1700 void  ib_set_client_data(struct ib_device *device, struct ib_client *client,
1701                          void *data);
1702 
1703 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
1704 {
1705         return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
1706 }
1707 
1708 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
1709 {
1710         return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
1711 }
1712 
1713 /**
1714  * ib_modify_qp_is_ok - Check that the supplied attribute mask
1715  * contains all required attributes and no attributes not allowed for
1716  * the given QP state transition.
1717  * @cur_state: Current QP state
1718  * @next_state: Next QP state
1719  * @type: QP type
1720  * @mask: Mask of supplied QP attributes
1721  * @ll : link layer of port
1722  *
1723  * This function is a helper function that a low-level driver's
1724  * modify_qp method can use to validate the consumer's input.  It
1725  * checks that cur_state and next_state are valid QP states, that a
1726  * transition from cur_state to next_state is allowed by the IB spec,
1727  * and that the attribute mask supplied is allowed for the transition.
1728  */
1729 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1730                        enum ib_qp_type type, enum ib_qp_attr_mask mask,
1731                        enum rdma_link_layer ll);
1732 
1733 int ib_register_event_handler  (struct ib_event_handler *event_handler);
1734 int ib_unregister_event_handler(struct ib_event_handler *event_handler);
1735 void ib_dispatch_event(struct ib_event *event);
1736 
1737 int ib_query_device(struct ib_device *device,
1738                     struct ib_device_attr *device_attr);
1739 
1740 int ib_query_port(struct ib_device *device,
1741                   u8 port_num, struct ib_port_attr *port_attr);
1742 
1743 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
1744                                                u8 port_num);
1745 
1746 int ib_query_gid(struct ib_device *device,
1747                  u8 port_num, int index, union ib_gid *gid);
1748 
1749 int ib_query_pkey(struct ib_device *device,
1750                   u8 port_num, u16 index, u16 *pkey);
1751 
1752 int ib_modify_device(struct ib_device *device,
1753                      int device_modify_mask,
1754                      struct ib_device_modify *device_modify);
1755 
1756 int ib_modify_port(struct ib_device *device,
1757                    u8 port_num, int port_modify_mask,
1758                    struct ib_port_modify *port_modify);
1759 
1760 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
1761                 u8 *port_num, u16 *index);
1762 
1763 int ib_find_pkey(struct ib_device *device,
1764                  u8 port_num, u16 pkey, u16 *index);
1765 
1766 /**
1767  * ib_alloc_pd - Allocates an unused protection domain.
1768  * @device: The device on which to allocate the protection domain.
1769  *
1770  * A protection domain object provides an association between QPs, shared
1771  * receive queues, address handles, memory regions, and memory windows.
1772  */
1773 struct ib_pd *ib_alloc_pd(struct ib_device *device);
1774 
1775 /**
1776  * ib_dealloc_pd - Deallocates a protection domain.
1777  * @pd: The protection domain to deallocate.
1778  */
1779 int ib_dealloc_pd(struct ib_pd *pd);
1780 
1781 /**
1782  * ib_create_ah - Creates an address handle for the given address vector.
1783  * @pd: The protection domain associated with the address handle.
1784  * @ah_attr: The attributes of the address vector.
1785  *
1786  * The address handle is used to reference a local or global destination
1787  * in all UD QP post sends.
1788  */
1789 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
1790 
1791 /**
1792  * ib_init_ah_from_wc - Initializes address handle attributes from a
1793  *   work completion.
1794  * @device: Device on which the received message arrived.
1795  * @port_num: Port on which the received message arrived.
1796  * @wc: Work completion associated with the received message.
1797  * @grh: References the received global route header.  This parameter is
1798  *   ignored unless the work completion indicates that the GRH is valid.
1799  * @ah_attr: Returned attributes that can be used when creating an address
1800  *   handle for replying to the message.
1801  */
1802 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
1803                        struct ib_grh *grh, struct ib_ah_attr *ah_attr);
1804 
1805 /**
1806  * ib_create_ah_from_wc - Creates an address handle associated with the
1807  *   sender of the specified work completion.
1808  * @pd: The protection domain associated with the address handle.
1809  * @wc: Work completion information associated with a received message.
1810  * @grh: References the received global route header.  This parameter is
1811  *   ignored unless the work completion indicates that the GRH is valid.
1812  * @port_num: The outbound port number to associate with the address.
1813  *
1814  * The address handle is used to reference a local or global destination
1815  * in all UD QP post sends.
1816  */
1817 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
1818                                    struct ib_grh *grh, u8 port_num);
1819 
1820 /**
1821  * ib_modify_ah - Modifies the address vector associated with an address
1822  *   handle.
1823  * @ah: The address handle to modify.
1824  * @ah_attr: The new address vector attributes to associate with the
1825  *   address handle.
1826  */
1827 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
1828 
1829 /**
1830  * ib_query_ah - Queries the address vector associated with an address
1831  *   handle.
1832  * @ah: The address handle to query.
1833  * @ah_attr: The address vector attributes associated with the address
1834  *   handle.
1835  */
1836 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
1837 
1838 /**
1839  * ib_destroy_ah - Destroys an address handle.
1840  * @ah: The address handle to destroy.
1841  */
1842 int ib_destroy_ah(struct ib_ah *ah);
1843 
1844 /**
1845  * ib_create_srq - Creates a SRQ associated with the specified protection
1846  *   domain.
1847  * @pd: The protection domain associated with the SRQ.
1848  * @srq_init_attr: A list of initial attributes required to create the
1849  *   SRQ.  If SRQ creation succeeds, then the attributes are updated to
1850  *   the actual capabilities of the created SRQ.
1851  *
1852  * srq_attr->max_wr and srq_attr->max_sge are read the determine the
1853  * requested size of the SRQ, and set to the actual values allocated
1854  * on return.  If ib_create_srq() succeeds, then max_wr and max_sge
1855  * will always be at least as large as the requested values.
1856  */
1857 struct ib_srq *ib_create_srq(struct ib_pd *pd,
1858                              struct ib_srq_init_attr *srq_init_attr);
1859 
1860 /**
1861  * ib_modify_srq - Modifies the attributes for the specified SRQ.
1862  * @srq: The SRQ to modify.
1863  * @srq_attr: On input, specifies the SRQ attributes to modify.  On output,
1864  *   the current values of selected SRQ attributes are returned.
1865  * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
1866  *   are being modified.
1867  *
1868  * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
1869  * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
1870  * the number of receives queued drops below the limit.
1871  */
1872 int ib_modify_srq(struct ib_srq *srq,
1873                   struct ib_srq_attr *srq_attr,
1874                   enum ib_srq_attr_mask srq_attr_mask);
1875 
1876 /**
1877  * ib_query_srq - Returns the attribute list and current values for the
1878  *   specified SRQ.
1879  * @srq: The SRQ to query.
1880  * @srq_attr: The attributes of the specified SRQ.
1881  */
1882 int ib_query_srq(struct ib_srq *srq,
1883                  struct ib_srq_attr *srq_attr);
1884 
1885 /**
1886  * ib_destroy_srq - Destroys the specified SRQ.
1887  * @srq: The SRQ to destroy.
1888  */
1889 int ib_destroy_srq(struct ib_srq *srq);
1890 
1891 /**
1892  * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
1893  * @srq: The SRQ to post the work request on.
1894  * @recv_wr: A list of work requests to post on the receive queue.
1895  * @bad_recv_wr: On an immediate failure, this parameter will reference
1896  *   the work request that failed to be posted on the QP.
1897  */
1898 static inline int ib_post_srq_recv(struct ib_srq *srq,
1899                                    struct ib_recv_wr *recv_wr,
1900                                    struct ib_recv_wr **bad_recv_wr)
1901 {
1902         return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
1903 }
1904 
1905 /**
1906  * ib_create_qp - Creates a QP associated with the specified protection
1907  *   domain.
1908  * @pd: The protection domain associated with the QP.
1909  * @qp_init_attr: A list of initial attributes required to create the
1910  *   QP.  If QP creation succeeds, then the attributes are updated to
1911  *   the actual capabilities of the created QP.
1912  */
1913 struct ib_qp *ib_create_qp(struct ib_pd *pd,
1914                            struct ib_qp_init_attr *qp_init_attr);
1915 
1916 /**
1917  * ib_modify_qp - Modifies the attributes for the specified QP and then
1918  *   transitions the QP to the given state.
1919  * @qp: The QP to modify.
1920  * @qp_attr: On input, specifies the QP attributes to modify.  On output,
1921  *   the current values of selected QP attributes are returned.
1922  * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
1923  *   are being modified.
1924  */
1925 int ib_modify_qp(struct ib_qp *qp,
1926                  struct ib_qp_attr *qp_attr,
1927                  int qp_attr_mask);
1928 
1929 /**
1930  * ib_query_qp - Returns the attribute list and current values for the
1931  *   specified QP.
1932  * @qp: The QP to query.
1933  * @qp_attr: The attributes of the specified QP.
1934  * @qp_attr_mask: A bit-mask used to select specific attributes to query.
1935  * @qp_init_attr: Additional attributes of the selected QP.
1936  *
1937  * The qp_attr_mask may be used to limit the query to gathering only the
1938  * selected attributes.
1939  */
1940 int ib_query_qp(struct ib_qp *qp,
1941                 struct ib_qp_attr *qp_attr,
1942                 int qp_attr_mask,
1943                 struct ib_qp_init_attr *qp_init_attr);
1944 
1945 /**
1946  * ib_destroy_qp - Destroys the specified QP.
1947  * @qp: The QP to destroy.
1948  */
1949 int ib_destroy_qp(struct ib_qp *qp);
1950 
1951 /**
1952  * ib_open_qp - Obtain a reference to an existing sharable QP.
1953  * @xrcd - XRC domain
1954  * @qp_open_attr: Attributes identifying the QP to open.
1955  *
1956  * Returns a reference to a sharable QP.
1957  */
1958 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
1959                          struct ib_qp_open_attr *qp_open_attr);
1960 
1961 /**
1962  * ib_close_qp - Release an external reference to a QP.
1963  * @qp: The QP handle to release
1964  *
1965  * The opened QP handle is released by the caller.  The underlying
1966  * shared QP is not destroyed until all internal references are released.
1967  */
1968 int ib_close_qp(struct ib_qp *qp);
1969 
1970 /**
1971  * ib_post_send - Posts a list of work requests to the send queue of
1972  *   the specified QP.
1973  * @qp: The QP to post the work request on.
1974  * @send_wr: A list of work requests to post on the send queue.
1975  * @bad_send_wr: On an immediate failure, this parameter will reference
1976  *   the work request that failed to be posted on the QP.
1977  *
1978  * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
1979  * error is returned, the QP state shall not be affected,
1980  * ib_post_send() will return an immediate error after queueing any
1981  * earlier work requests in the list.
1982  */
1983 static inline int ib_post_send(struct ib_qp *qp,
1984                                struct ib_send_wr *send_wr,
1985                                struct ib_send_wr **bad_send_wr)
1986 {
1987         return qp->device->post_send(qp, send_wr, bad_send_wr);
1988 }
1989 
1990 /**
1991  * ib_post_recv - Posts a list of work requests to the receive queue of
1992  *   the specified QP.
1993  * @qp: The QP to post the work request on.
1994  * @recv_wr: A list of work requests to post on the receive queue.
1995  * @bad_recv_wr: On an immediate failure, this parameter will reference
1996  *   the work request that failed to be posted on the QP.
1997  */
1998 static inline int ib_post_recv(struct ib_qp *qp,
1999                                struct ib_recv_wr *recv_wr,
2000                                struct ib_recv_wr **bad_recv_wr)
2001 {
2002         return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
2003 }
2004 
2005 /**
2006  * ib_create_cq - Creates a CQ on the specified device.
2007  * @device: The device on which to create the CQ.
2008  * @comp_handler: A user-specified callback that is invoked when a
2009  *   completion event occurs on the CQ.
2010  * @event_handler: A user-specified callback that is invoked when an
2011  *   asynchronous event not associated with a completion occurs on the CQ.
2012  * @cq_context: Context associated with the CQ returned to the user via
2013  *   the associated completion and event handlers.
2014  * @cqe: The minimum size of the CQ.
2015  * @comp_vector - Completion vector used to signal completion events.
2016  *     Must be >= 0 and < context->num_comp_vectors.
2017  *
2018  * Users can examine the cq structure to determine the actual CQ size.
2019  */
2020 struct ib_cq *ib_create_cq(struct ib_device *device,
2021                            ib_comp_handler comp_handler,
2022                            void (*event_handler)(struct ib_event *, void *),
2023                            void *cq_context, int cqe, int comp_vector);
2024 
2025 /**
2026  * ib_resize_cq - Modifies the capacity of the CQ.
2027  * @cq: The CQ to resize.
2028  * @cqe: The minimum size of the CQ.
2029  *
2030  * Users can examine the cq structure to determine the actual CQ size.
2031  */
2032 int ib_resize_cq(struct ib_cq *cq, int cqe);
2033 
2034 /**
2035  * ib_modify_cq - Modifies moderation params of the CQ
2036  * @cq: The CQ to modify.
2037  * @cq_count: number of CQEs that will trigger an event
2038  * @cq_period: max period of time in usec before triggering an event
2039  *
2040  */
2041 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
2042 
2043 /**
2044  * ib_destroy_cq - Destroys the specified CQ.
2045  * @cq: The CQ to destroy.
2046  */
2047 int ib_destroy_cq(struct ib_cq *cq);
2048 
2049 /**
2050  * ib_poll_cq - poll a CQ for completion(s)
2051  * @cq:the CQ being polled
2052  * @num_entries:maximum number of completions to return
2053  * @wc:array of at least @num_entries &struct ib_wc where completions
2054  *   will be returned
2055  *
2056  * Poll a CQ for (possibly multiple) completions.  If the return value
2057  * is < 0, an error occurred.  If the return value is >= 0, it is the
2058  * number of completions returned.  If the return value is
2059  * non-negative and < num_entries, then the CQ was emptied.
2060  */
2061 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
2062                              struct ib_wc *wc)
2063 {
2064         return cq->device->poll_cq(cq, num_entries, wc);
2065 }
2066 
2067 /**
2068  * ib_peek_cq - Returns the number of unreaped completions currently
2069  *   on the specified CQ.
2070  * @cq: The CQ to peek.
2071  * @wc_cnt: A minimum number of unreaped completions to check for.
2072  *
2073  * If the number of unreaped completions is greater than or equal to wc_cnt,
2074  * this function returns wc_cnt, otherwise, it returns the actual number of
2075  * unreaped completions.
2076  */
2077 int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
2078 
2079 /**
2080  * ib_req_notify_cq - Request completion notification on a CQ.
2081  * @cq: The CQ to generate an event for.
2082  * @flags:
2083  *   Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
2084  *   to request an event on the next solicited event or next work
2085  *   completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
2086  *   may also be |ed in to request a hint about missed events, as
2087  *   described below.
2088  *
2089  * Return Value:
2090  *    < 0 means an error occurred while requesting notification
2091  *   == 0 means notification was requested successfully, and if
2092  *        IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
2093  *        were missed and it is safe to wait for another event.  In
2094  *        this case is it guaranteed that any work completions added
2095  *        to the CQ since the last CQ poll will trigger a completion
2096  *        notification event.
2097  *    > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
2098  *        in.  It means that the consumer must poll the CQ again to
2099  *        make sure it is empty to avoid missing an event because of a
2100  *        race between requesting notification and an entry being
2101  *        added to the CQ.  This return value means it is possible
2102  *        (but not guaranteed) that a work completion has been added
2103  *        to the CQ since the last poll without triggering a
2104  *        completion notification event.
2105  */
2106 static inline int ib_req_notify_cq(struct ib_cq *cq,
2107                                    enum ib_cq_notify_flags flags)
2108 {
2109         return cq->device->req_notify_cq(cq, flags);
2110 }
2111 
2112 /**
2113  * ib_req_ncomp_notif - Request completion notification when there are
2114  *   at least the specified number of unreaped completions on the CQ.
2115  * @cq: The CQ to generate an event for.
2116  * @wc_cnt: The number of unreaped completions that should be on the
2117  *   CQ before an event is generated.
2118  */
2119 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
2120 {
2121         return cq->device->req_ncomp_notif ?
2122                 cq->device->req_ncomp_notif(cq, wc_cnt) :
2123                 -ENOSYS;
2124 }
2125 
2126 /**
2127  * ib_get_dma_mr - Returns a memory region for system memory that is
2128  *   usable for DMA.
2129  * @pd: The protection domain associated with the memory region.
2130  * @mr_access_flags: Specifies the memory access rights.
2131  *
2132  * Note that the ib_dma_*() functions defined below must be used
2133  * to create/destroy addresses used with the Lkey or Rkey returned
2134  * by ib_get_dma_mr().
2135  */
2136 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
2137 
2138 /**
2139  * ib_dma_mapping_error - check a DMA addr for error
2140  * @dev: The device for which the dma_addr was created
2141  * @dma_addr: The DMA address to check
2142  */
2143 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2144 {
2145         if (dev->dma_ops)
2146                 return dev->dma_ops->mapping_error(dev, dma_addr);
2147         return dma_mapping_error(dev->dma_device, dma_addr);
2148 }
2149 
2150 /**
2151  * ib_dma_map_single - Map a kernel virtual address to DMA address
2152  * @dev: The device for which the dma_addr is to be created
2153  * @cpu_addr: The kernel virtual address
2154  * @size: The size of the region in bytes
2155  * @direction: The direction of the DMA
2156  */
2157 static inline u64 ib_dma_map_single(struct ib_device *dev,
2158                                     void *cpu_addr, size_t size,
2159                                     enum dma_data_direction direction)
2160 {
2161         if (dev->dma_ops)
2162                 return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
2163         return dma_map_single(dev->dma_device, cpu_addr, size, direction);
2164 }
2165 
2166 /**
2167  * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
2168  * @dev: The device for which the DMA address was created
2169  * @addr: The DMA address
2170  * @size: The size of the region in bytes
2171  * @direction: The direction of the DMA
2172  */
2173 static inline void ib_dma_unmap_single(struct ib_device *dev,
2174                                        u64 addr, size_t size,
2175                                        enum dma_data_direction direction)
2176 {
2177         if (dev->dma_ops)
2178                 dev->dma_ops->unmap_single(dev, addr, size, direction);
2179         else
2180                 dma_unmap_single(dev->dma_device, addr, size, direction);
2181 }
2182 
2183 static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
2184                                           void *cpu_addr, size_t size,
2185                                           enum dma_data_direction direction,
2186                                           struct dma_attrs *attrs)
2187 {
2188         return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
2189                                     direction, attrs);
2190 }
2191 
2192 static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
2193                                              u64 addr, size_t size,
2194                                              enum dma_data_direction direction,
2195                                              struct dma_attrs *attrs)
2196 {
2197         return dma_unmap_single_attrs(dev->dma_device, addr, size,
2198                                       direction, attrs);
2199 }
2200 
2201 /**
2202  * ib_dma_map_page - Map a physical page to DMA address
2203  * @dev: The device for which the dma_addr is to be created
2204  * @page: The page to be mapped
2205  * @offset: The offset within the page
2206  * @size: The size of the region in bytes
2207  * @direction: The direction of the DMA
2208  */
2209 static inline u64 ib_dma_map_page(struct ib_device *dev,
2210                                   struct page *page,
2211                                   unsigned long offset,
2212                                   size_t size,
2213                                          enum dma_data_direction direction)
2214 {
2215         if (dev->dma_ops)
2216                 return dev->dma_ops->map_page(dev, page, offset, size, direction);
2217         return dma_map_page(dev->dma_device, page, offset, size, direction);
2218 }
2219 
2220 /**
2221  * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
2222  * @dev: The device for which the DMA address was created
2223  * @addr: The DMA address
2224  * @size: The size of the region in bytes
2225  * @direction: The direction of the DMA
2226  */
2227 static inline void ib_dma_unmap_page(struct ib_device *dev,
2228                                      u64 addr, size_t size,
2229                                      enum dma_data_direction direction)
2230 {
2231         if (dev->dma_ops)
2232                 dev->dma_ops->unmap_page(dev, addr, size, direction);
2233         else
2234                 dma_unmap_page(dev->dma_device, addr, size, direction);
2235 }
2236 
2237 /**
2238  * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
2239  * @dev: The device for which the DMA addresses are to be created
2240  * @sg: The array of scatter/gather entries
2241  * @nents: The number of scatter/gather entries
2242  * @direction: The direction of the DMA
2243  */
2244 static inline int ib_dma_map_sg(struct ib_device *dev,
2245                                 struct scatterlist *sg, int nents,
2246                                 enum dma_data_direction direction)
2247 {
2248         if (dev->dma_ops)
2249                 return dev->dma_ops->map_sg(dev, sg, nents, direction);
2250         return dma_map_sg(dev->dma_device, sg, nents, direction);
2251 }
2252 
2253 /**
2254  * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
2255  * @dev: The device for which the DMA addresses were created
2256  * @sg: The array of scatter/gather entries
2257  * @nents: The number of scatter/gather entries
2258  * @direction: The direction of the DMA
2259  */
2260 static inline void ib_dma_unmap_sg(struct ib_device *dev,
2261                                    struct scatterlist *sg, int nents,
2262                                    enum dma_data_direction direction)
2263 {
2264         if (dev->dma_ops)
2265                 dev->dma_ops->unmap_sg(dev, sg, nents, direction);
2266         else
2267                 dma_unmap_sg(dev->dma_device, sg, nents, direction);
2268 }
2269 
2270 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
2271                                       struct scatterlist *sg, int nents,
2272                                       enum dma_data_direction direction,
2273                                       struct dma_attrs *attrs)
2274 {
2275         return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2276 }
2277 
2278 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
2279                                          struct scatterlist *sg, int nents,
2280                                          enum dma_data_direction direction,
2281                                          struct dma_attrs *attrs)
2282 {
2283         dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2284 }
2285 /**
2286  * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
2287  * @dev: The device for which the DMA addresses were created
2288  * @sg: The scatter/gather entry
2289  *
2290  * Note: this function is obsolete. To do: change all occurrences of
2291  * ib_sg_dma_address() into sg_dma_address().
2292  */
2293 static inline u64 ib_sg_dma_address(struct ib_device *dev,
2294                                     struct scatterlist *sg)
2295 {
2296         return sg_dma_address(sg);
2297 }
2298 
2299 /**
2300  * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
2301  * @dev: The device for which the DMA addresses were created
2302  * @sg: The scatter/gather entry
2303  *
2304  * Note: this function is obsolete. To do: change all occurrences of
2305  * ib_sg_dma_len() into sg_dma_len().
2306  */
2307 static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
2308                                          struct scatterlist *sg)
2309 {
2310         return sg_dma_len(sg);
2311 }
2312 
2313 /**
2314  * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
2315  * @dev: The device for which the DMA address was created
2316  * @addr: The DMA address
2317  * @size: The size of the region in bytes
2318  * @dir: The direction of the DMA
2319  */
2320 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
2321                                               u64 addr,
2322                                               size_t size,
2323                                               enum dma_data_direction dir)
2324 {
2325         if (dev->dma_ops)
2326                 dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
2327         else
2328                 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2329 }
2330 
2331 /**
2332  * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
2333  * @dev: The device for which the DMA address was created
2334  * @addr: The DMA address
2335  * @size: The size of the region in bytes
2336  * @dir: The direction of the DMA
2337  */
2338 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
2339                                                  u64 addr,
2340                                                  size_t size,
2341                                                  enum dma_data_direction dir)
2342 {
2343         if (dev->dma_ops)
2344                 dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
2345         else
2346                 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2347 }
2348 
2349 /**
2350  * ib_dma_alloc_coherent - Allocate memory and map it for DMA
2351  * @dev: The device for which the DMA address is requested
2352  * @size: The size of the region to allocate in bytes
2353  * @dma_handle: A pointer for returning the DMA address of the region
2354  * @flag: memory allocator flags
2355  */
2356 static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
2357                                            size_t size,
2358                                            u64 *dma_handle,
2359                                            gfp_t flag)
2360 {
2361         if (dev->dma_ops)
2362                 return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
2363         else {
2364                 dma_addr_t handle;
2365                 void *ret;
2366 
2367                 ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
2368                 *dma_handle = handle;
2369                 return ret;
2370         }
2371 }
2372 
2373 /**
2374  * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
2375  * @dev: The device for which the DMA addresses were allocated
2376  * @size: The size of the region
2377  * @cpu_addr: the address returned by ib_dma_alloc_coherent()
2378  * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
2379  */
2380 static inline void ib_dma_free_coherent(struct ib_device *dev,
2381                                         size_t size, void *cpu_addr,
2382                                         u64 dma_handle)
2383 {
2384         if (dev->dma_ops)
2385                 dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
2386         else
2387                 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
2388 }
2389 
2390 /**
2391  * ib_reg_phys_mr - Prepares a virtually addressed memory region for use
2392  *   by an HCA.
2393  * @pd: The protection domain associated assigned to the registered region.
2394  * @phys_buf_array: Specifies a list of physical buffers to use in the
2395  *   memory region.
2396  * @num_phys_buf: Specifies the size of the phys_buf_array.
2397  * @mr_access_flags: Specifies the memory access rights.
2398  * @iova_start: The offset of the region's starting I/O virtual address.
2399  */
2400 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
2401                              struct ib_phys_buf *phys_buf_array,
2402                              int num_phys_buf,
2403                              int mr_access_flags,
2404                              u64 *iova_start);
2405 
2406 /**
2407  * ib_rereg_phys_mr - Modifies the attributes of an existing memory region.
2408  *   Conceptually, this call performs the functions deregister memory region
2409  *   followed by register physical memory region.  Where possible,
2410  *   resources are reused instead of deallocated and reallocated.
2411  * @mr: The memory region to modify.
2412  * @mr_rereg_mask: A bit-mask used to indicate which of the following
2413  *   properties of the memory region are being modified.
2414  * @pd: If %IB_MR_REREG_PD is set in mr_rereg_mask, this field specifies
2415  *   the new protection domain to associated with the memory region,
2416  *   otherwise, this parameter is ignored.
2417  * @phys_buf_array: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2418  *   field specifies a list of physical buffers to use in the new
2419  *   translation, otherwise, this parameter is ignored.
2420  * @num_phys_buf: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2421  *   field specifies the size of the phys_buf_array, otherwise, this
2422  *   parameter is ignored.
2423  * @mr_access_flags: If %IB_MR_REREG_ACCESS is set in mr_rereg_mask, this
2424  *   field specifies the new memory access rights, otherwise, this
2425  *   parameter is ignored.
2426  * @iova_start: The offset of the region's starting I/O virtual address.
2427  */
2428 int ib_rereg_phys_mr(struct ib_mr *mr,
2429                      int mr_rereg_mask,
2430                      struct ib_pd *pd,
2431                      struct ib_phys_buf *phys_buf_array,
2432                      int num_phys_buf,
2433                      int mr_access_flags,
2434                      u64 *iova_start);
2435 
2436 /**
2437  * ib_query_mr - Retrieves information about a specific memory region.
2438  * @mr: The memory region to retrieve information about.
2439  * @mr_attr: The attributes of the specified memory region.
2440  */
2441 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
2442 
2443 /**
2444  * ib_dereg_mr - Deregisters a memory region and removes it from the
2445  *   HCA translation table.
2446  * @mr: The memory region to deregister.
2447  *
2448  * This function can fail, if the memory region has memory windows bound to it.
2449  */
2450 int ib_dereg_mr(struct ib_mr *mr);
2451 
2452 
2453 /**
2454  * ib_create_mr - Allocates a memory region that may be used for
2455  *     signature handover operations.
2456  * @pd: The protection domain associated with the region.
2457  * @mr_init_attr: memory region init attributes.
2458  */
2459 struct ib_mr *ib_create_mr(struct ib_pd *pd,
2460                            struct ib_mr_init_attr *mr_init_attr);
2461 
2462 /**
2463  * ib_destroy_mr - Destroys a memory region that was created using
2464  *     ib_create_mr and removes it from HW translation tables.
2465  * @mr: The memory region to destroy.
2466  *
2467  * This function can fail, if the memory region has memory windows bound to it.
2468  */
2469 int ib_destroy_mr(struct ib_mr *mr);
2470 
2471 /**
2472  * ib_alloc_fast_reg_mr - Allocates memory region usable with the
2473  *   IB_WR_FAST_REG_MR send work request.
2474  * @pd: The protection domain associated with the region.
2475  * @max_page_list_len: requested max physical buffer list length to be
2476  *   used with fast register work requests for this MR.
2477  */
2478 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
2479 
2480 /**
2481  * ib_alloc_fast_reg_page_list - Allocates a page list array
2482  * @device - ib device pointer.
2483  * @page_list_len - size of the page list array to be allocated.
2484  *
2485  * This allocates and returns a struct ib_fast_reg_page_list * and a
2486  * page_list array that is at least page_list_len in size.  The actual
2487  * size is returned in max_page_list_len.  The caller is responsible
2488  * for initializing the contents of the page_list array before posting
2489  * a send work request with the IB_WC_FAST_REG_MR opcode.
2490  *
2491  * The page_list array entries must be translated using one of the
2492  * ib_dma_*() functions just like the addresses passed to
2493  * ib_map_phys_fmr().  Once the ib_post_send() is issued, the struct
2494  * ib_fast_reg_page_list must not be modified by the caller until the
2495  * IB_WC_FAST_REG_MR work request completes.
2496  */
2497 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(
2498                                 struct ib_device *device, int page_list_len);
2499 
2500 /**
2501  * ib_free_fast_reg_page_list - Deallocates a previously allocated
2502  *   page list array.
2503  * @page_list - struct ib_fast_reg_page_list pointer to be deallocated.
2504  */
2505 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);
2506 
2507 /**
2508  * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
2509  *   R_Key and L_Key.
2510  * @mr - struct ib_mr pointer to be updated.
2511  * @newkey - new key to be used.
2512  */
2513 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
2514 {
2515         mr->lkey = (mr->lkey & 0xffffff00) | newkey;
2516         mr->rkey = (mr->rkey & 0xffffff00) | newkey;
2517 }
2518 
2519 /**
2520  * ib_inc_rkey - increments the key portion of the given rkey. Can be used
2521  * for calculating a new rkey for type 2 memory windows.
2522  * @rkey - the rkey to increment.
2523  */
2524 static inline u32 ib_inc_rkey(u32 rkey)
2525 {
2526         const u32 mask = 0x000000ff;
2527         return ((rkey + 1) & mask) | (rkey & ~mask);
2528 }
2529 
2530 /**
2531  * ib_alloc_mw - Allocates a memory window.
2532  * @pd: The protection domain associated with the memory window.
2533  * @type: The type of the memory window (1 or 2).
2534  */
2535 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type);
2536 
2537 /**
2538  * ib_bind_mw - Posts a work request to the send queue of the specified
2539  *   QP, which binds the memory window to the given address range and
2540  *   remote access attributes.
2541  * @qp: QP to post the bind work request on.
2542  * @mw: The memory window to bind.
2543  * @mw_bind: Specifies information about the memory window, including
2544  *   its address range, remote access rights, and associated memory region.
2545  *
2546  * If there is no immediate error, the function will update the rkey member
2547  * of the mw parameter to its new value. The bind operation can still fail
2548  * asynchronously.
2549  */
2550 static inline int ib_bind_mw(struct ib_qp *qp,
2551                              struct ib_mw *mw,
2552                              struct ib_mw_bind *mw_bind)
2553 {
2554         /* XXX reference counting in corresponding MR? */
2555         return mw->device->bind_mw ?
2556                 mw->device->bind_mw(qp, mw, mw_bind) :
2557                 -ENOSYS;
2558 }
2559 
2560 /**
2561  * ib_dealloc_mw - Deallocates a memory window.
2562  * @mw: The memory window to deallocate.
2563  */
2564 int ib_dealloc_mw(struct ib_mw *mw);
2565 
2566 /**
2567  * ib_alloc_fmr - Allocates a unmapped fast memory region.
2568  * @pd: The protection domain associated with the unmapped region.
2569  * @mr_access_flags: Specifies the memory access rights.
2570  * @fmr_attr: Attributes of the unmapped region.
2571  *
2572  * A fast memory region must be mapped before it can be used as part of
2573  * a work request.
2574  */
2575 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
2576                             int mr_access_flags,
2577                             struct ib_fmr_attr *fmr_attr);
2578 
2579 /**
2580  * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
2581  * @fmr: The fast memory region to associate with the pages.
2582  * @page_list: An array of physical pages to map to the fast memory region.
2583  * @list_len: The number of pages in page_list.
2584  * @iova: The I/O virtual address to use with the mapped region.
2585  */
2586 static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
2587                                   u64 *page_list, int list_len,
2588                                   u64 iova)
2589 {
2590         return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
2591 }
2592 
2593 /**
2594  * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
2595  * @fmr_list: A linked list of fast memory regions to unmap.
2596  */
2597 int ib_unmap_fmr(struct list_head *fmr_list);
2598 
2599 /**
2600  * ib_dealloc_fmr - Deallocates a fast memory region.
2601  * @fmr: The fast memory region to deallocate.
2602  */
2603 int ib_dealloc_fmr(struct ib_fmr *fmr);
2604 
2605 /**
2606  * ib_attach_mcast - Attaches the specified QP to a multicast group.
2607  * @qp: QP to attach to the multicast group.  The QP must be type
2608  *   IB_QPT_UD.
2609  * @gid: Multicast group GID.
2610  * @lid: Multicast group LID in host byte order.
2611  *
2612  * In order to send and receive multicast packets, subnet
2613  * administration must have created the multicast group and configured
2614  * the fabric appropriately.  The port associated with the specified
2615  * QP must also be a member of the multicast group.
2616  */
2617 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2618 
2619 /**
2620  * ib_detach_mcast - Detaches the specified QP from a multicast group.
2621  * @qp: QP to detach from the multicast group.
2622  * @gid: Multicast group GID.
2623  * @lid: Multicast group LID in host byte order.
2624  */
2625 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2626 
2627 /**
2628  * ib_alloc_xrcd - Allocates an XRC domain.
2629  * @device: The device on which to allocate the XRC domain.
2630  */
2631 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
2632 
2633 /**
2634  * ib_dealloc_xrcd - Deallocates an XRC domain.
2635  * @xrcd: The XRC domain to deallocate.
2636  */
2637 int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
2638 
2639 struct ib_flow *ib_create_flow(struct ib_qp *qp,
2640                                struct ib_flow_attr *flow_attr, int domain);
2641 int ib_destroy_flow(struct ib_flow *flow_id);
2642 
2643 static inline int ib_check_mr_access(int flags)
2644 {
2645         /*
2646          * Local write permission is required if remote write or
2647          * remote atomic permission is also requested.
2648          */
2649         if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
2650             !(flags & IB_ACCESS_LOCAL_WRITE))
2651                 return -EINVAL;
2652 
2653         return 0;
2654 }
2655 
2656 /**
2657  * ib_check_mr_status: lightweight check of MR status.
2658  *     This routine may provide status checks on a selected
2659  *     ib_mr. first use is for signature status check.
2660  *
2661  * @mr: A memory region.
2662  * @check_mask: Bitmask of which checks to perform from
2663  *     ib_mr_status_check enumeration.
2664  * @mr_status: The container of relevant status checks.
2665  *     failed checks will be indicated in the status bitmask
2666  *     and the relevant info shall be in the error item.
2667  */
2668 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
2669                        struct ib_mr_status *mr_status);
2670 
2671 #endif /* IB_VERBS_H */
2672 

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