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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 <linux/socket.h>
 52 #include <linux/irq_poll.h>
 53 #include <uapi/linux/if_ether.h>
 54 #include <net/ipv6.h>
 55 #include <net/ip.h>
 56 #include <linux/string.h>
 57 #include <linux/slab.h>
 58 
 59 #include <linux/atomic.h>
 60 #include <linux/mmu_notifier.h>
 61 #include <asm/uaccess.h>
 62 
 63 extern struct workqueue_struct *ib_wq;
 64 extern struct workqueue_struct *ib_comp_wq;
 65 
 66 union ib_gid {
 67         u8      raw[16];
 68         struct {
 69                 __be64  subnet_prefix;
 70                 __be64  interface_id;
 71         } global;
 72 };
 73 
 74 extern union ib_gid zgid;
 75 
 76 enum ib_gid_type {
 77         /* If link layer is Ethernet, this is RoCE V1 */
 78         IB_GID_TYPE_IB        = 0,
 79         IB_GID_TYPE_ROCE      = 0,
 80         IB_GID_TYPE_ROCE_UDP_ENCAP = 1,
 81         IB_GID_TYPE_SIZE
 82 };
 83 
 84 #define ROCE_V2_UDP_DPORT      4791
 85 struct ib_gid_attr {
 86         enum ib_gid_type        gid_type;
 87         struct net_device       *ndev;
 88 };
 89 
 90 enum rdma_node_type {
 91         /* IB values map to NodeInfo:NodeType. */
 92         RDMA_NODE_IB_CA         = 1,
 93         RDMA_NODE_IB_SWITCH,
 94         RDMA_NODE_IB_ROUTER,
 95         RDMA_NODE_RNIC,
 96         RDMA_NODE_USNIC,
 97         RDMA_NODE_USNIC_UDP,
 98 };
 99 
100 enum rdma_transport_type {
101         RDMA_TRANSPORT_IB,
102         RDMA_TRANSPORT_IWARP,
103         RDMA_TRANSPORT_USNIC,
104         RDMA_TRANSPORT_USNIC_UDP
105 };
106 
107 enum rdma_protocol_type {
108         RDMA_PROTOCOL_IB,
109         RDMA_PROTOCOL_IBOE,
110         RDMA_PROTOCOL_IWARP,
111         RDMA_PROTOCOL_USNIC_UDP
112 };
113 
114 __attribute_const__ enum rdma_transport_type
115 rdma_node_get_transport(enum rdma_node_type node_type);
116 
117 enum rdma_network_type {
118         RDMA_NETWORK_IB,
119         RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB,
120         RDMA_NETWORK_IPV4,
121         RDMA_NETWORK_IPV6
122 };
123 
124 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type)
125 {
126         if (network_type == RDMA_NETWORK_IPV4 ||
127             network_type == RDMA_NETWORK_IPV6)
128                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
129 
130         /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */
131         return IB_GID_TYPE_IB;
132 }
133 
134 static inline enum rdma_network_type ib_gid_to_network_type(enum ib_gid_type gid_type,
135                                                             union ib_gid *gid)
136 {
137         if (gid_type == IB_GID_TYPE_IB)
138                 return RDMA_NETWORK_IB;
139 
140         if (ipv6_addr_v4mapped((struct in6_addr *)gid))
141                 return RDMA_NETWORK_IPV4;
142         else
143                 return RDMA_NETWORK_IPV6;
144 }
145 
146 enum rdma_link_layer {
147         IB_LINK_LAYER_UNSPECIFIED,
148         IB_LINK_LAYER_INFINIBAND,
149         IB_LINK_LAYER_ETHERNET,
150 };
151 
152 enum ib_device_cap_flags {
153         IB_DEVICE_RESIZE_MAX_WR                 = (1 << 0),
154         IB_DEVICE_BAD_PKEY_CNTR                 = (1 << 1),
155         IB_DEVICE_BAD_QKEY_CNTR                 = (1 << 2),
156         IB_DEVICE_RAW_MULTI                     = (1 << 3),
157         IB_DEVICE_AUTO_PATH_MIG                 = (1 << 4),
158         IB_DEVICE_CHANGE_PHY_PORT               = (1 << 5),
159         IB_DEVICE_UD_AV_PORT_ENFORCE            = (1 << 6),
160         IB_DEVICE_CURR_QP_STATE_MOD             = (1 << 7),
161         IB_DEVICE_SHUTDOWN_PORT                 = (1 << 8),
162         IB_DEVICE_INIT_TYPE                     = (1 << 9),
163         IB_DEVICE_PORT_ACTIVE_EVENT             = (1 << 10),
164         IB_DEVICE_SYS_IMAGE_GUID                = (1 << 11),
165         IB_DEVICE_RC_RNR_NAK_GEN                = (1 << 12),
166         IB_DEVICE_SRQ_RESIZE                    = (1 << 13),
167         IB_DEVICE_N_NOTIFY_CQ                   = (1 << 14),
168 
169         /*
170          * This device supports a per-device lkey or stag that can be
171          * used without performing a memory registration for the local
172          * memory.  Note that ULPs should never check this flag, but
173          * instead of use the local_dma_lkey flag in the ib_pd structure,
174          * which will always contain a usable lkey.
175          */
176         IB_DEVICE_LOCAL_DMA_LKEY                = (1 << 15),
177         IB_DEVICE_RESERVED /* old SEND_W_INV */ = (1 << 16),
178         IB_DEVICE_MEM_WINDOW                    = (1 << 17),
179         /*
180          * Devices should set IB_DEVICE_UD_IP_SUM if they support
181          * insertion of UDP and TCP checksum on outgoing UD IPoIB
182          * messages and can verify the validity of checksum for
183          * incoming messages.  Setting this flag implies that the
184          * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
185          */
186         IB_DEVICE_UD_IP_CSUM                    = (1 << 18),
187         IB_DEVICE_UD_TSO                        = (1 << 19),
188         IB_DEVICE_XRC                           = (1 << 20),
189 
190         /*
191          * This device supports the IB "base memory management extension",
192          * which includes support for fast registrations (IB_WR_REG_MR,
193          * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs).  This flag should
194          * also be set by any iWarp device which must support FRs to comply
195          * to the iWarp verbs spec.  iWarp devices also support the
196          * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the
197          * stag.
198          */
199         IB_DEVICE_MEM_MGT_EXTENSIONS            = (1 << 21),
200         IB_DEVICE_BLOCK_MULTICAST_LOOPBACK      = (1 << 22),
201         IB_DEVICE_MEM_WINDOW_TYPE_2A            = (1 << 23),
202         IB_DEVICE_MEM_WINDOW_TYPE_2B            = (1 << 24),
203         IB_DEVICE_RC_IP_CSUM                    = (1 << 25),
204         IB_DEVICE_RAW_IP_CSUM                   = (1 << 26),
205         /*
206          * Devices should set IB_DEVICE_CROSS_CHANNEL if they
207          * support execution of WQEs that involve synchronization
208          * of I/O operations with single completion queue managed
209          * by hardware.
210          */
211         IB_DEVICE_CROSS_CHANNEL         = (1 << 27),
212         IB_DEVICE_MANAGED_FLOW_STEERING         = (1 << 29),
213         IB_DEVICE_SIGNATURE_HANDOVER            = (1 << 30),
214         IB_DEVICE_ON_DEMAND_PAGING              = (1 << 31),
215 };
216 
217 enum ib_signature_prot_cap {
218         IB_PROT_T10DIF_TYPE_1 = 1,
219         IB_PROT_T10DIF_TYPE_2 = 1 << 1,
220         IB_PROT_T10DIF_TYPE_3 = 1 << 2,
221 };
222 
223 enum ib_signature_guard_cap {
224         IB_GUARD_T10DIF_CRC     = 1,
225         IB_GUARD_T10DIF_CSUM    = 1 << 1,
226 };
227 
228 enum ib_atomic_cap {
229         IB_ATOMIC_NONE,
230         IB_ATOMIC_HCA,
231         IB_ATOMIC_GLOB
232 };
233 
234 enum ib_odp_general_cap_bits {
235         IB_ODP_SUPPORT = 1 << 0,
236 };
237 
238 enum ib_odp_transport_cap_bits {
239         IB_ODP_SUPPORT_SEND     = 1 << 0,
240         IB_ODP_SUPPORT_RECV     = 1 << 1,
241         IB_ODP_SUPPORT_WRITE    = 1 << 2,
242         IB_ODP_SUPPORT_READ     = 1 << 3,
243         IB_ODP_SUPPORT_ATOMIC   = 1 << 4,
244 };
245 
246 struct ib_odp_caps {
247         uint64_t general_caps;
248         struct {
249                 uint32_t  rc_odp_caps;
250                 uint32_t  uc_odp_caps;
251                 uint32_t  ud_odp_caps;
252         } per_transport_caps;
253 };
254 
255 enum ib_cq_creation_flags {
256         IB_CQ_FLAGS_TIMESTAMP_COMPLETION   = 1 << 0,
257         IB_CQ_FLAGS_IGNORE_OVERRUN         = 1 << 1,
258 };
259 
260 struct ib_cq_init_attr {
261         unsigned int    cqe;
262         int             comp_vector;
263         u32             flags;
264 };
265 
266 struct ib_device_attr {
267         u64                     fw_ver;
268         __be64                  sys_image_guid;
269         u64                     max_mr_size;
270         u64                     page_size_cap;
271         u32                     vendor_id;
272         u32                     vendor_part_id;
273         u32                     hw_ver;
274         int                     max_qp;
275         int                     max_qp_wr;
276         int                     device_cap_flags;
277         int                     max_sge;
278         int                     max_sge_rd;
279         int                     max_cq;
280         int                     max_cqe;
281         int                     max_mr;
282         int                     max_pd;
283         int                     max_qp_rd_atom;
284         int                     max_ee_rd_atom;
285         int                     max_res_rd_atom;
286         int                     max_qp_init_rd_atom;
287         int                     max_ee_init_rd_atom;
288         enum ib_atomic_cap      atomic_cap;
289         enum ib_atomic_cap      masked_atomic_cap;
290         int                     max_ee;
291         int                     max_rdd;
292         int                     max_mw;
293         int                     max_raw_ipv6_qp;
294         int                     max_raw_ethy_qp;
295         int                     max_mcast_grp;
296         int                     max_mcast_qp_attach;
297         int                     max_total_mcast_qp_attach;
298         int                     max_ah;
299         int                     max_fmr;
300         int                     max_map_per_fmr;
301         int                     max_srq;
302         int                     max_srq_wr;
303         int                     max_srq_sge;
304         unsigned int            max_fast_reg_page_list_len;
305         u16                     max_pkeys;
306         u8                      local_ca_ack_delay;
307         int                     sig_prot_cap;
308         int                     sig_guard_cap;
309         struct ib_odp_caps      odp_caps;
310         uint64_t                timestamp_mask;
311         uint64_t                hca_core_clock; /* in KHZ */
312 };
313 
314 enum ib_mtu {
315         IB_MTU_256  = 1,
316         IB_MTU_512  = 2,
317         IB_MTU_1024 = 3,
318         IB_MTU_2048 = 4,
319         IB_MTU_4096 = 5
320 };
321 
322 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
323 {
324         switch (mtu) {
325         case IB_MTU_256:  return  256;
326         case IB_MTU_512:  return  512;
327         case IB_MTU_1024: return 1024;
328         case IB_MTU_2048: return 2048;
329         case IB_MTU_4096: return 4096;
330         default:          return -1;
331         }
332 }
333 
334 enum ib_port_state {
335         IB_PORT_NOP             = 0,
336         IB_PORT_DOWN            = 1,
337         IB_PORT_INIT            = 2,
338         IB_PORT_ARMED           = 3,
339         IB_PORT_ACTIVE          = 4,
340         IB_PORT_ACTIVE_DEFER    = 5
341 };
342 
343 enum ib_port_cap_flags {
344         IB_PORT_SM                              = 1 <<  1,
345         IB_PORT_NOTICE_SUP                      = 1 <<  2,
346         IB_PORT_TRAP_SUP                        = 1 <<  3,
347         IB_PORT_OPT_IPD_SUP                     = 1 <<  4,
348         IB_PORT_AUTO_MIGR_SUP                   = 1 <<  5,
349         IB_PORT_SL_MAP_SUP                      = 1 <<  6,
350         IB_PORT_MKEY_NVRAM                      = 1 <<  7,
351         IB_PORT_PKEY_NVRAM                      = 1 <<  8,
352         IB_PORT_LED_INFO_SUP                    = 1 <<  9,
353         IB_PORT_SM_DISABLED                     = 1 << 10,
354         IB_PORT_SYS_IMAGE_GUID_SUP              = 1 << 11,
355         IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP       = 1 << 12,
356         IB_PORT_EXTENDED_SPEEDS_SUP             = 1 << 14,
357         IB_PORT_CM_SUP                          = 1 << 16,
358         IB_PORT_SNMP_TUNNEL_SUP                 = 1 << 17,
359         IB_PORT_REINIT_SUP                      = 1 << 18,
360         IB_PORT_DEVICE_MGMT_SUP                 = 1 << 19,
361         IB_PORT_VENDOR_CLASS_SUP                = 1 << 20,
362         IB_PORT_DR_NOTICE_SUP                   = 1 << 21,
363         IB_PORT_CAP_MASK_NOTICE_SUP             = 1 << 22,
364         IB_PORT_BOOT_MGMT_SUP                   = 1 << 23,
365         IB_PORT_LINK_LATENCY_SUP                = 1 << 24,
366         IB_PORT_CLIENT_REG_SUP                  = 1 << 25,
367         IB_PORT_IP_BASED_GIDS                   = 1 << 26,
368 };
369 
370 enum ib_port_width {
371         IB_WIDTH_1X     = 1,
372         IB_WIDTH_4X     = 2,
373         IB_WIDTH_8X     = 4,
374         IB_WIDTH_12X    = 8
375 };
376 
377 static inline int ib_width_enum_to_int(enum ib_port_width width)
378 {
379         switch (width) {
380         case IB_WIDTH_1X:  return  1;
381         case IB_WIDTH_4X:  return  4;
382         case IB_WIDTH_8X:  return  8;
383         case IB_WIDTH_12X: return 12;
384         default:          return -1;
385         }
386 }
387 
388 enum ib_port_speed {
389         IB_SPEED_SDR    = 1,
390         IB_SPEED_DDR    = 2,
391         IB_SPEED_QDR    = 4,
392         IB_SPEED_FDR10  = 8,
393         IB_SPEED_FDR    = 16,
394         IB_SPEED_EDR    = 32
395 };
396 
397 struct ib_protocol_stats {
398         /* TBD... */
399 };
400 
401 struct iw_protocol_stats {
402         u64     ipInReceives;
403         u64     ipInHdrErrors;
404         u64     ipInTooBigErrors;
405         u64     ipInNoRoutes;
406         u64     ipInAddrErrors;
407         u64     ipInUnknownProtos;
408         u64     ipInTruncatedPkts;
409         u64     ipInDiscards;
410         u64     ipInDelivers;
411         u64     ipOutForwDatagrams;
412         u64     ipOutRequests;
413         u64     ipOutDiscards;
414         u64     ipOutNoRoutes;
415         u64     ipReasmTimeout;
416         u64     ipReasmReqds;
417         u64     ipReasmOKs;
418         u64     ipReasmFails;
419         u64     ipFragOKs;
420         u64     ipFragFails;
421         u64     ipFragCreates;
422         u64     ipInMcastPkts;
423         u64     ipOutMcastPkts;
424         u64     ipInBcastPkts;
425         u64     ipOutBcastPkts;
426 
427         u64     tcpRtoAlgorithm;
428         u64     tcpRtoMin;
429         u64     tcpRtoMax;
430         u64     tcpMaxConn;
431         u64     tcpActiveOpens;
432         u64     tcpPassiveOpens;
433         u64     tcpAttemptFails;
434         u64     tcpEstabResets;
435         u64     tcpCurrEstab;
436         u64     tcpInSegs;
437         u64     tcpOutSegs;
438         u64     tcpRetransSegs;
439         u64     tcpInErrs;
440         u64     tcpOutRsts;
441 };
442 
443 union rdma_protocol_stats {
444         struct ib_protocol_stats        ib;
445         struct iw_protocol_stats        iw;
446 };
447 
448 /* Define bits for the various functionality this port needs to be supported by
449  * the core.
450  */
451 /* Management                           0x00000FFF */
452 #define RDMA_CORE_CAP_IB_MAD            0x00000001
453 #define RDMA_CORE_CAP_IB_SMI            0x00000002
454 #define RDMA_CORE_CAP_IB_CM             0x00000004
455 #define RDMA_CORE_CAP_IW_CM             0x00000008
456 #define RDMA_CORE_CAP_IB_SA             0x00000010
457 #define RDMA_CORE_CAP_OPA_MAD           0x00000020
458 
459 /* Address format                       0x000FF000 */
460 #define RDMA_CORE_CAP_AF_IB             0x00001000
461 #define RDMA_CORE_CAP_ETH_AH            0x00002000
462 
463 /* Protocol                             0xFFF00000 */
464 #define RDMA_CORE_CAP_PROT_IB           0x00100000
465 #define RDMA_CORE_CAP_PROT_ROCE         0x00200000
466 #define RDMA_CORE_CAP_PROT_IWARP        0x00400000
467 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000
468 
469 #define RDMA_CORE_PORT_IBA_IB          (RDMA_CORE_CAP_PROT_IB  \
470                                         | RDMA_CORE_CAP_IB_MAD \
471                                         | RDMA_CORE_CAP_IB_SMI \
472                                         | RDMA_CORE_CAP_IB_CM  \
473                                         | RDMA_CORE_CAP_IB_SA  \
474                                         | RDMA_CORE_CAP_AF_IB)
475 #define RDMA_CORE_PORT_IBA_ROCE        (RDMA_CORE_CAP_PROT_ROCE \
476                                         | RDMA_CORE_CAP_IB_MAD  \
477                                         | RDMA_CORE_CAP_IB_CM   \
478                                         | RDMA_CORE_CAP_AF_IB   \
479                                         | RDMA_CORE_CAP_ETH_AH)
480 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP                       \
481                                         (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \
482                                         | RDMA_CORE_CAP_IB_MAD  \
483                                         | RDMA_CORE_CAP_IB_CM   \
484                                         | RDMA_CORE_CAP_AF_IB   \
485                                         | RDMA_CORE_CAP_ETH_AH)
486 #define RDMA_CORE_PORT_IWARP           (RDMA_CORE_CAP_PROT_IWARP \
487                                         | RDMA_CORE_CAP_IW_CM)
488 #define RDMA_CORE_PORT_INTEL_OPA       (RDMA_CORE_PORT_IBA_IB  \
489                                         | RDMA_CORE_CAP_OPA_MAD)
490 
491 struct ib_port_attr {
492         enum ib_port_state      state;
493         enum ib_mtu             max_mtu;
494         enum ib_mtu             active_mtu;
495         int                     gid_tbl_len;
496         u32                     port_cap_flags;
497         u32                     max_msg_sz;
498         u32                     bad_pkey_cntr;
499         u32                     qkey_viol_cntr;
500         u16                     pkey_tbl_len;
501         u16                     lid;
502         u16                     sm_lid;
503         u8                      lmc;
504         u8                      max_vl_num;
505         u8                      sm_sl;
506         u8                      subnet_timeout;
507         u8                      init_type_reply;
508         u8                      active_width;
509         u8                      active_speed;
510         u8                      phys_state;
511 };
512 
513 enum ib_device_modify_flags {
514         IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
515         IB_DEVICE_MODIFY_NODE_DESC      = 1 << 1
516 };
517 
518 struct ib_device_modify {
519         u64     sys_image_guid;
520         char    node_desc[64];
521 };
522 
523 enum ib_port_modify_flags {
524         IB_PORT_SHUTDOWN                = 1,
525         IB_PORT_INIT_TYPE               = (1<<2),
526         IB_PORT_RESET_QKEY_CNTR         = (1<<3)
527 };
528 
529 struct ib_port_modify {
530         u32     set_port_cap_mask;
531         u32     clr_port_cap_mask;
532         u8      init_type;
533 };
534 
535 enum ib_event_type {
536         IB_EVENT_CQ_ERR,
537         IB_EVENT_QP_FATAL,
538         IB_EVENT_QP_REQ_ERR,
539         IB_EVENT_QP_ACCESS_ERR,
540         IB_EVENT_COMM_EST,
541         IB_EVENT_SQ_DRAINED,
542         IB_EVENT_PATH_MIG,
543         IB_EVENT_PATH_MIG_ERR,
544         IB_EVENT_DEVICE_FATAL,
545         IB_EVENT_PORT_ACTIVE,
546         IB_EVENT_PORT_ERR,
547         IB_EVENT_LID_CHANGE,
548         IB_EVENT_PKEY_CHANGE,
549         IB_EVENT_SM_CHANGE,
550         IB_EVENT_SRQ_ERR,
551         IB_EVENT_SRQ_LIMIT_REACHED,
552         IB_EVENT_QP_LAST_WQE_REACHED,
553         IB_EVENT_CLIENT_REREGISTER,
554         IB_EVENT_GID_CHANGE,
555 };
556 
557 const char *__attribute_const__ ib_event_msg(enum ib_event_type event);
558 
559 struct ib_event {
560         struct ib_device        *device;
561         union {
562                 struct ib_cq    *cq;
563                 struct ib_qp    *qp;
564                 struct ib_srq   *srq;
565                 u8              port_num;
566         } element;
567         enum ib_event_type      event;
568 };
569 
570 struct ib_event_handler {
571         struct ib_device *device;
572         void            (*handler)(struct ib_event_handler *, struct ib_event *);
573         struct list_head  list;
574 };
575 
576 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler)          \
577         do {                                                    \
578                 (_ptr)->device  = _device;                      \
579                 (_ptr)->handler = _handler;                     \
580                 INIT_LIST_HEAD(&(_ptr)->list);                  \
581         } while (0)
582 
583 struct ib_global_route {
584         union ib_gid    dgid;
585         u32             flow_label;
586         u8              sgid_index;
587         u8              hop_limit;
588         u8              traffic_class;
589 };
590 
591 struct ib_grh {
592         __be32          version_tclass_flow;
593         __be16          paylen;
594         u8              next_hdr;
595         u8              hop_limit;
596         union ib_gid    sgid;
597         union ib_gid    dgid;
598 };
599 
600 union rdma_network_hdr {
601         struct ib_grh ibgrh;
602         struct {
603                 /* The IB spec states that if it's IPv4, the header
604                  * is located in the last 20 bytes of the header.
605                  */
606                 u8              reserved[20];
607                 struct iphdr    roce4grh;
608         };
609 };
610 
611 enum {
612         IB_MULTICAST_QPN = 0xffffff
613 };
614 
615 #define IB_LID_PERMISSIVE       cpu_to_be16(0xFFFF)
616 
617 enum ib_ah_flags {
618         IB_AH_GRH       = 1
619 };
620 
621 enum ib_rate {
622         IB_RATE_PORT_CURRENT = 0,
623         IB_RATE_2_5_GBPS = 2,
624         IB_RATE_5_GBPS   = 5,
625         IB_RATE_10_GBPS  = 3,
626         IB_RATE_20_GBPS  = 6,
627         IB_RATE_30_GBPS  = 4,
628         IB_RATE_40_GBPS  = 7,
629         IB_RATE_60_GBPS  = 8,
630         IB_RATE_80_GBPS  = 9,
631         IB_RATE_120_GBPS = 10,
632         IB_RATE_14_GBPS  = 11,
633         IB_RATE_56_GBPS  = 12,
634         IB_RATE_112_GBPS = 13,
635         IB_RATE_168_GBPS = 14,
636         IB_RATE_25_GBPS  = 15,
637         IB_RATE_100_GBPS = 16,
638         IB_RATE_200_GBPS = 17,
639         IB_RATE_300_GBPS = 18
640 };
641 
642 /**
643  * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
644  * base rate of 2.5 Gbit/sec.  For example, IB_RATE_5_GBPS will be
645  * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
646  * @rate: rate to convert.
647  */
648 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
649 
650 /**
651  * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
652  * For example, IB_RATE_2_5_GBPS will be converted to 2500.
653  * @rate: rate to convert.
654  */
655 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
656 
657 
658 /**
659  * enum ib_mr_type - memory region type
660  * @IB_MR_TYPE_MEM_REG:       memory region that is used for
661  *                            normal registration
662  * @IB_MR_TYPE_SIGNATURE:     memory region that is used for
663  *                            signature operations (data-integrity
664  *                            capable regions)
665  */
666 enum ib_mr_type {
667         IB_MR_TYPE_MEM_REG,
668         IB_MR_TYPE_SIGNATURE,
669 };
670 
671 /**
672  * Signature types
673  * IB_SIG_TYPE_NONE: Unprotected.
674  * IB_SIG_TYPE_T10_DIF: Type T10-DIF
675  */
676 enum ib_signature_type {
677         IB_SIG_TYPE_NONE,
678         IB_SIG_TYPE_T10_DIF,
679 };
680 
681 /**
682  * Signature T10-DIF block-guard types
683  * IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules.
684  * IB_T10DIF_CSUM: Corresponds to IP checksum rules.
685  */
686 enum ib_t10_dif_bg_type {
687         IB_T10DIF_CRC,
688         IB_T10DIF_CSUM
689 };
690 
691 /**
692  * struct ib_t10_dif_domain - Parameters specific for T10-DIF
693  *     domain.
694  * @bg_type: T10-DIF block guard type (CRC|CSUM)
695  * @pi_interval: protection information interval.
696  * @bg: seed of guard computation.
697  * @app_tag: application tag of guard block
698  * @ref_tag: initial guard block reference tag.
699  * @ref_remap: Indicate wethear the reftag increments each block
700  * @app_escape: Indicate to skip block check if apptag=0xffff
701  * @ref_escape: Indicate to skip block check if reftag=0xffffffff
702  * @apptag_check_mask: check bitmask of application tag.
703  */
704 struct ib_t10_dif_domain {
705         enum ib_t10_dif_bg_type bg_type;
706         u16                     pi_interval;
707         u16                     bg;
708         u16                     app_tag;
709         u32                     ref_tag;
710         bool                    ref_remap;
711         bool                    app_escape;
712         bool                    ref_escape;
713         u16                     apptag_check_mask;
714 };
715 
716 /**
717  * struct ib_sig_domain - Parameters for signature domain
718  * @sig_type: specific signauture type
719  * @sig: union of all signature domain attributes that may
720  *     be used to set domain layout.
721  */
722 struct ib_sig_domain {
723         enum ib_signature_type sig_type;
724         union {
725                 struct ib_t10_dif_domain dif;
726         } sig;
727 };
728 
729 /**
730  * struct ib_sig_attrs - Parameters for signature handover operation
731  * @check_mask: bitmask for signature byte check (8 bytes)
732  * @mem: memory domain layout desciptor.
733  * @wire: wire domain layout desciptor.
734  */
735 struct ib_sig_attrs {
736         u8                      check_mask;
737         struct ib_sig_domain    mem;
738         struct ib_sig_domain    wire;
739 };
740 
741 enum ib_sig_err_type {
742         IB_SIG_BAD_GUARD,
743         IB_SIG_BAD_REFTAG,
744         IB_SIG_BAD_APPTAG,
745 };
746 
747 /**
748  * struct ib_sig_err - signature error descriptor
749  */
750 struct ib_sig_err {
751         enum ib_sig_err_type    err_type;
752         u32                     expected;
753         u32                     actual;
754         u64                     sig_err_offset;
755         u32                     key;
756 };
757 
758 enum ib_mr_status_check {
759         IB_MR_CHECK_SIG_STATUS = 1,
760 };
761 
762 /**
763  * struct ib_mr_status - Memory region status container
764  *
765  * @fail_status: Bitmask of MR checks status. For each
766  *     failed check a corresponding status bit is set.
767  * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
768  *     failure.
769  */
770 struct ib_mr_status {
771         u32                 fail_status;
772         struct ib_sig_err   sig_err;
773 };
774 
775 /**
776  * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
777  * enum.
778  * @mult: multiple to convert.
779  */
780 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult);
781 
782 struct ib_ah_attr {
783         struct ib_global_route  grh;
784         u16                     dlid;
785         u8                      sl;
786         u8                      src_path_bits;
787         u8                      static_rate;
788         u8                      ah_flags;
789         u8                      port_num;
790         u8                      dmac[ETH_ALEN];
791 };
792 
793 enum ib_wc_status {
794         IB_WC_SUCCESS,
795         IB_WC_LOC_LEN_ERR,
796         IB_WC_LOC_QP_OP_ERR,
797         IB_WC_LOC_EEC_OP_ERR,
798         IB_WC_LOC_PROT_ERR,
799         IB_WC_WR_FLUSH_ERR,
800         IB_WC_MW_BIND_ERR,
801         IB_WC_BAD_RESP_ERR,
802         IB_WC_LOC_ACCESS_ERR,
803         IB_WC_REM_INV_REQ_ERR,
804         IB_WC_REM_ACCESS_ERR,
805         IB_WC_REM_OP_ERR,
806         IB_WC_RETRY_EXC_ERR,
807         IB_WC_RNR_RETRY_EXC_ERR,
808         IB_WC_LOC_RDD_VIOL_ERR,
809         IB_WC_REM_INV_RD_REQ_ERR,
810         IB_WC_REM_ABORT_ERR,
811         IB_WC_INV_EECN_ERR,
812         IB_WC_INV_EEC_STATE_ERR,
813         IB_WC_FATAL_ERR,
814         IB_WC_RESP_TIMEOUT_ERR,
815         IB_WC_GENERAL_ERR
816 };
817 
818 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status);
819 
820 enum ib_wc_opcode {
821         IB_WC_SEND,
822         IB_WC_RDMA_WRITE,
823         IB_WC_RDMA_READ,
824         IB_WC_COMP_SWAP,
825         IB_WC_FETCH_ADD,
826         IB_WC_LSO,
827         IB_WC_LOCAL_INV,
828         IB_WC_REG_MR,
829         IB_WC_MASKED_COMP_SWAP,
830         IB_WC_MASKED_FETCH_ADD,
831 /*
832  * Set value of IB_WC_RECV so consumers can test if a completion is a
833  * receive by testing (opcode & IB_WC_RECV).
834  */
835         IB_WC_RECV                      = 1 << 7,
836         IB_WC_RECV_RDMA_WITH_IMM
837 };
838 
839 enum ib_wc_flags {
840         IB_WC_GRH               = 1,
841         IB_WC_WITH_IMM          = (1<<1),
842         IB_WC_WITH_INVALIDATE   = (1<<2),
843         IB_WC_IP_CSUM_OK        = (1<<3),
844         IB_WC_WITH_SMAC         = (1<<4),
845         IB_WC_WITH_VLAN         = (1<<5),
846         IB_WC_WITH_NETWORK_HDR_TYPE     = (1<<6),
847 };
848 
849 struct ib_wc {
850         union {
851                 u64             wr_id;
852                 struct ib_cqe   *wr_cqe;
853         };
854         enum ib_wc_status       status;
855         enum ib_wc_opcode       opcode;
856         u32                     vendor_err;
857         u32                     byte_len;
858         struct ib_qp           *qp;
859         union {
860                 __be32          imm_data;
861                 u32             invalidate_rkey;
862         } ex;
863         u32                     src_qp;
864         int                     wc_flags;
865         u16                     pkey_index;
866         u16                     slid;
867         u8                      sl;
868         u8                      dlid_path_bits;
869         u8                      port_num;       /* valid only for DR SMPs on switches */
870         u8                      smac[ETH_ALEN];
871         u16                     vlan_id;
872         u8                      network_hdr_type;
873 };
874 
875 enum ib_cq_notify_flags {
876         IB_CQ_SOLICITED                 = 1 << 0,
877         IB_CQ_NEXT_COMP                 = 1 << 1,
878         IB_CQ_SOLICITED_MASK            = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
879         IB_CQ_REPORT_MISSED_EVENTS      = 1 << 2,
880 };
881 
882 enum ib_srq_type {
883         IB_SRQT_BASIC,
884         IB_SRQT_XRC
885 };
886 
887 enum ib_srq_attr_mask {
888         IB_SRQ_MAX_WR   = 1 << 0,
889         IB_SRQ_LIMIT    = 1 << 1,
890 };
891 
892 struct ib_srq_attr {
893         u32     max_wr;
894         u32     max_sge;
895         u32     srq_limit;
896 };
897 
898 struct ib_srq_init_attr {
899         void                  (*event_handler)(struct ib_event *, void *);
900         void                   *srq_context;
901         struct ib_srq_attr      attr;
902         enum ib_srq_type        srq_type;
903 
904         union {
905                 struct {
906                         struct ib_xrcd *xrcd;
907                         struct ib_cq   *cq;
908                 } xrc;
909         } ext;
910 };
911 
912 struct ib_qp_cap {
913         u32     max_send_wr;
914         u32     max_recv_wr;
915         u32     max_send_sge;
916         u32     max_recv_sge;
917         u32     max_inline_data;
918 };
919 
920 enum ib_sig_type {
921         IB_SIGNAL_ALL_WR,
922         IB_SIGNAL_REQ_WR
923 };
924 
925 enum ib_qp_type {
926         /*
927          * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
928          * here (and in that order) since the MAD layer uses them as
929          * indices into a 2-entry table.
930          */
931         IB_QPT_SMI,
932         IB_QPT_GSI,
933 
934         IB_QPT_RC,
935         IB_QPT_UC,
936         IB_QPT_UD,
937         IB_QPT_RAW_IPV6,
938         IB_QPT_RAW_ETHERTYPE,
939         IB_QPT_RAW_PACKET = 8,
940         IB_QPT_XRC_INI = 9,
941         IB_QPT_XRC_TGT,
942         IB_QPT_MAX,
943         /* Reserve a range for qp types internal to the low level driver.
944          * These qp types will not be visible at the IB core layer, so the
945          * IB_QPT_MAX usages should not be affected in the core layer
946          */
947         IB_QPT_RESERVED1 = 0x1000,
948         IB_QPT_RESERVED2,
949         IB_QPT_RESERVED3,
950         IB_QPT_RESERVED4,
951         IB_QPT_RESERVED5,
952         IB_QPT_RESERVED6,
953         IB_QPT_RESERVED7,
954         IB_QPT_RESERVED8,
955         IB_QPT_RESERVED9,
956         IB_QPT_RESERVED10,
957 };
958 
959 enum ib_qp_create_flags {
960         IB_QP_CREATE_IPOIB_UD_LSO               = 1 << 0,
961         IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK   = 1 << 1,
962         IB_QP_CREATE_CROSS_CHANNEL              = 1 << 2,
963         IB_QP_CREATE_MANAGED_SEND               = 1 << 3,
964         IB_QP_CREATE_MANAGED_RECV               = 1 << 4,
965         IB_QP_CREATE_NETIF_QP                   = 1 << 5,
966         IB_QP_CREATE_SIGNATURE_EN               = 1 << 6,
967         IB_QP_CREATE_USE_GFP_NOIO               = 1 << 7,
968         /* reserve bits 26-31 for low level drivers' internal use */
969         IB_QP_CREATE_RESERVED_START             = 1 << 26,
970         IB_QP_CREATE_RESERVED_END               = 1 << 31,
971 };
972 
973 /*
974  * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
975  * callback to destroy the passed in QP.
976  */
977 
978 struct ib_qp_init_attr {
979         void                  (*event_handler)(struct ib_event *, void *);
980         void                   *qp_context;
981         struct ib_cq           *send_cq;
982         struct ib_cq           *recv_cq;
983         struct ib_srq          *srq;
984         struct ib_xrcd         *xrcd;     /* XRC TGT QPs only */
985         struct ib_qp_cap        cap;
986         enum ib_sig_type        sq_sig_type;
987         enum ib_qp_type         qp_type;
988         enum ib_qp_create_flags create_flags;
989         u8                      port_num; /* special QP types only */
990 };
991 
992 struct ib_qp_open_attr {
993         void                  (*event_handler)(struct ib_event *, void *);
994         void                   *qp_context;
995         u32                     qp_num;
996         enum ib_qp_type         qp_type;
997 };
998 
999 enum ib_rnr_timeout {
1000         IB_RNR_TIMER_655_36 =  0,
1001         IB_RNR_TIMER_000_01 =  1,
1002         IB_RNR_TIMER_000_02 =  2,
1003         IB_RNR_TIMER_000_03 =  3,
1004         IB_RNR_TIMER_000_04 =  4,
1005         IB_RNR_TIMER_000_06 =  5,
1006         IB_RNR_TIMER_000_08 =  6,
1007         IB_RNR_TIMER_000_12 =  7,
1008         IB_RNR_TIMER_000_16 =  8,
1009         IB_RNR_TIMER_000_24 =  9,
1010         IB_RNR_TIMER_000_32 = 10,
1011         IB_RNR_TIMER_000_48 = 11,
1012         IB_RNR_TIMER_000_64 = 12,
1013         IB_RNR_TIMER_000_96 = 13,
1014         IB_RNR_TIMER_001_28 = 14,
1015         IB_RNR_TIMER_001_92 = 15,
1016         IB_RNR_TIMER_002_56 = 16,
1017         IB_RNR_TIMER_003_84 = 17,
1018         IB_RNR_TIMER_005_12 = 18,
1019         IB_RNR_TIMER_007_68 = 19,
1020         IB_RNR_TIMER_010_24 = 20,
1021         IB_RNR_TIMER_015_36 = 21,
1022         IB_RNR_TIMER_020_48 = 22,
1023         IB_RNR_TIMER_030_72 = 23,
1024         IB_RNR_TIMER_040_96 = 24,
1025         IB_RNR_TIMER_061_44 = 25,
1026         IB_RNR_TIMER_081_92 = 26,
1027         IB_RNR_TIMER_122_88 = 27,
1028         IB_RNR_TIMER_163_84 = 28,
1029         IB_RNR_TIMER_245_76 = 29,
1030         IB_RNR_TIMER_327_68 = 30,
1031         IB_RNR_TIMER_491_52 = 31
1032 };
1033 
1034 enum ib_qp_attr_mask {
1035         IB_QP_STATE                     = 1,
1036         IB_QP_CUR_STATE                 = (1<<1),
1037         IB_QP_EN_SQD_ASYNC_NOTIFY       = (1<<2),
1038         IB_QP_ACCESS_FLAGS              = (1<<3),
1039         IB_QP_PKEY_INDEX                = (1<<4),
1040         IB_QP_PORT                      = (1<<5),
1041         IB_QP_QKEY                      = (1<<6),
1042         IB_QP_AV                        = (1<<7),
1043         IB_QP_PATH_MTU                  = (1<<8),
1044         IB_QP_TIMEOUT                   = (1<<9),
1045         IB_QP_RETRY_CNT                 = (1<<10),
1046         IB_QP_RNR_RETRY                 = (1<<11),
1047         IB_QP_RQ_PSN                    = (1<<12),
1048         IB_QP_MAX_QP_RD_ATOMIC          = (1<<13),
1049         IB_QP_ALT_PATH                  = (1<<14),
1050         IB_QP_MIN_RNR_TIMER             = (1<<15),
1051         IB_QP_SQ_PSN                    = (1<<16),
1052         IB_QP_MAX_DEST_RD_ATOMIC        = (1<<17),
1053         IB_QP_PATH_MIG_STATE            = (1<<18),
1054         IB_QP_CAP                       = (1<<19),
1055         IB_QP_DEST_QPN                  = (1<<20),
1056         IB_QP_RESERVED1                 = (1<<21),
1057         IB_QP_RESERVED2                 = (1<<22),
1058         IB_QP_RESERVED3                 = (1<<23),
1059         IB_QP_RESERVED4                 = (1<<24),
1060 };
1061 
1062 enum ib_qp_state {
1063         IB_QPS_RESET,
1064         IB_QPS_INIT,
1065         IB_QPS_RTR,
1066         IB_QPS_RTS,
1067         IB_QPS_SQD,
1068         IB_QPS_SQE,
1069         IB_QPS_ERR
1070 };
1071 
1072 enum ib_mig_state {
1073         IB_MIG_MIGRATED,
1074         IB_MIG_REARM,
1075         IB_MIG_ARMED
1076 };
1077 
1078 enum ib_mw_type {
1079         IB_MW_TYPE_1 = 1,
1080         IB_MW_TYPE_2 = 2
1081 };
1082 
1083 struct ib_qp_attr {
1084         enum ib_qp_state        qp_state;
1085         enum ib_qp_state        cur_qp_state;
1086         enum ib_mtu             path_mtu;
1087         enum ib_mig_state       path_mig_state;
1088         u32                     qkey;
1089         u32                     rq_psn;
1090         u32                     sq_psn;
1091         u32                     dest_qp_num;
1092         int                     qp_access_flags;
1093         struct ib_qp_cap        cap;
1094         struct ib_ah_attr       ah_attr;
1095         struct ib_ah_attr       alt_ah_attr;
1096         u16                     pkey_index;
1097         u16                     alt_pkey_index;
1098         u8                      en_sqd_async_notify;
1099         u8                      sq_draining;
1100         u8                      max_rd_atomic;
1101         u8                      max_dest_rd_atomic;
1102         u8                      min_rnr_timer;
1103         u8                      port_num;
1104         u8                      timeout;
1105         u8                      retry_cnt;
1106         u8                      rnr_retry;
1107         u8                      alt_port_num;
1108         u8                      alt_timeout;
1109 };
1110 
1111 enum ib_wr_opcode {
1112         IB_WR_RDMA_WRITE,
1113         IB_WR_RDMA_WRITE_WITH_IMM,
1114         IB_WR_SEND,
1115         IB_WR_SEND_WITH_IMM,
1116         IB_WR_RDMA_READ,
1117         IB_WR_ATOMIC_CMP_AND_SWP,
1118         IB_WR_ATOMIC_FETCH_AND_ADD,
1119         IB_WR_LSO,
1120         IB_WR_SEND_WITH_INV,
1121         IB_WR_RDMA_READ_WITH_INV,
1122         IB_WR_LOCAL_INV,
1123         IB_WR_REG_MR,
1124         IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
1125         IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
1126         IB_WR_REG_SIG_MR,
1127         /* reserve values for low level drivers' internal use.
1128          * These values will not be used at all in the ib core layer.
1129          */
1130         IB_WR_RESERVED1 = 0xf0,
1131         IB_WR_RESERVED2,
1132         IB_WR_RESERVED3,
1133         IB_WR_RESERVED4,
1134         IB_WR_RESERVED5,
1135         IB_WR_RESERVED6,
1136         IB_WR_RESERVED7,
1137         IB_WR_RESERVED8,
1138         IB_WR_RESERVED9,
1139         IB_WR_RESERVED10,
1140 };
1141 
1142 enum ib_send_flags {
1143         IB_SEND_FENCE           = 1,
1144         IB_SEND_SIGNALED        = (1<<1),
1145         IB_SEND_SOLICITED       = (1<<2),
1146         IB_SEND_INLINE          = (1<<3),
1147         IB_SEND_IP_CSUM         = (1<<4),
1148 
1149         /* reserve bits 26-31 for low level drivers' internal use */
1150         IB_SEND_RESERVED_START  = (1 << 26),
1151         IB_SEND_RESERVED_END    = (1 << 31),
1152 };
1153 
1154 struct ib_sge {
1155         u64     addr;
1156         u32     length;
1157         u32     lkey;
1158 };
1159 
1160 struct ib_cqe {
1161         void (*done)(struct ib_cq *cq, struct ib_wc *wc);
1162 };
1163 
1164 struct ib_send_wr {
1165         struct ib_send_wr      *next;
1166         union {
1167                 u64             wr_id;
1168                 struct ib_cqe   *wr_cqe;
1169         };
1170         struct ib_sge          *sg_list;
1171         int                     num_sge;
1172         enum ib_wr_opcode       opcode;
1173         int                     send_flags;
1174         union {
1175                 __be32          imm_data;
1176                 u32             invalidate_rkey;
1177         } ex;
1178 };
1179 
1180 struct ib_rdma_wr {
1181         struct ib_send_wr       wr;
1182         u64                     remote_addr;
1183         u32                     rkey;
1184 };
1185 
1186 static inline struct ib_rdma_wr *rdma_wr(struct ib_send_wr *wr)
1187 {
1188         return container_of(wr, struct ib_rdma_wr, wr);
1189 }
1190 
1191 struct ib_atomic_wr {
1192         struct ib_send_wr       wr;
1193         u64                     remote_addr;
1194         u64                     compare_add;
1195         u64                     swap;
1196         u64                     compare_add_mask;
1197         u64                     swap_mask;
1198         u32                     rkey;
1199 };
1200 
1201 static inline struct ib_atomic_wr *atomic_wr(struct ib_send_wr *wr)
1202 {
1203         return container_of(wr, struct ib_atomic_wr, wr);
1204 }
1205 
1206 struct ib_ud_wr {
1207         struct ib_send_wr       wr;
1208         struct ib_ah            *ah;
1209         void                    *header;
1210         int                     hlen;
1211         int                     mss;
1212         u32                     remote_qpn;
1213         u32                     remote_qkey;
1214         u16                     pkey_index; /* valid for GSI only */
1215         u8                      port_num;   /* valid for DR SMPs on switch only */
1216 };
1217 
1218 static inline struct ib_ud_wr *ud_wr(struct ib_send_wr *wr)
1219 {
1220         return container_of(wr, struct ib_ud_wr, wr);
1221 }
1222 
1223 struct ib_reg_wr {
1224         struct ib_send_wr       wr;
1225         struct ib_mr            *mr;
1226         u32                     key;
1227         int                     access;
1228 };
1229 
1230 static inline struct ib_reg_wr *reg_wr(struct ib_send_wr *wr)
1231 {
1232         return container_of(wr, struct ib_reg_wr, wr);
1233 }
1234 
1235 struct ib_sig_handover_wr {
1236         struct ib_send_wr       wr;
1237         struct ib_sig_attrs    *sig_attrs;
1238         struct ib_mr           *sig_mr;
1239         int                     access_flags;
1240         struct ib_sge          *prot;
1241 };
1242 
1243 static inline struct ib_sig_handover_wr *sig_handover_wr(struct ib_send_wr *wr)
1244 {
1245         return container_of(wr, struct ib_sig_handover_wr, wr);
1246 }
1247 
1248 struct ib_recv_wr {
1249         struct ib_recv_wr      *next;
1250         union {
1251                 u64             wr_id;
1252                 struct ib_cqe   *wr_cqe;
1253         };
1254         struct ib_sge          *sg_list;
1255         int                     num_sge;
1256 };
1257 
1258 enum ib_access_flags {
1259         IB_ACCESS_LOCAL_WRITE   = 1,
1260         IB_ACCESS_REMOTE_WRITE  = (1<<1),
1261         IB_ACCESS_REMOTE_READ   = (1<<2),
1262         IB_ACCESS_REMOTE_ATOMIC = (1<<3),
1263         IB_ACCESS_MW_BIND       = (1<<4),
1264         IB_ZERO_BASED           = (1<<5),
1265         IB_ACCESS_ON_DEMAND     = (1<<6),
1266 };
1267 
1268 /*
1269  * XXX: these are apparently used for ->rereg_user_mr, no idea why they
1270  * are hidden here instead of a uapi header!
1271  */
1272 enum ib_mr_rereg_flags {
1273         IB_MR_REREG_TRANS       = 1,
1274         IB_MR_REREG_PD          = (1<<1),
1275         IB_MR_REREG_ACCESS      = (1<<2),
1276         IB_MR_REREG_SUPPORTED   = ((IB_MR_REREG_ACCESS << 1) - 1)
1277 };
1278 
1279 struct ib_fmr_attr {
1280         int     max_pages;
1281         int     max_maps;
1282         u8      page_shift;
1283 };
1284 
1285 struct ib_umem;
1286 
1287 struct ib_ucontext {
1288         struct ib_device       *device;
1289         struct list_head        pd_list;
1290         struct list_head        mr_list;
1291         struct list_head        mw_list;
1292         struct list_head        cq_list;
1293         struct list_head        qp_list;
1294         struct list_head        srq_list;
1295         struct list_head        ah_list;
1296         struct list_head        xrcd_list;
1297         struct list_head        rule_list;
1298         int                     closing;
1299 
1300         struct pid             *tgid;
1301 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
1302         struct rb_root      umem_tree;
1303         /*
1304          * Protects .umem_rbroot and tree, as well as odp_mrs_count and
1305          * mmu notifiers registration.
1306          */
1307         struct rw_semaphore     umem_rwsem;
1308         void (*invalidate_range)(struct ib_umem *umem,
1309                                  unsigned long start, unsigned long end);
1310 
1311         struct mmu_notifier     mn;
1312         atomic_t                notifier_count;
1313         /* A list of umems that don't have private mmu notifier counters yet. */
1314         struct list_head        no_private_counters;
1315         int                     odp_mrs_count;
1316 #endif
1317 };
1318 
1319 struct ib_uobject {
1320         u64                     user_handle;    /* handle given to us by userspace */
1321         struct ib_ucontext     *context;        /* associated user context */
1322         void                   *object;         /* containing object */
1323         struct list_head        list;           /* link to context's list */
1324         int                     id;             /* index into kernel idr */
1325         struct kref             ref;
1326         struct rw_semaphore     mutex;          /* protects .live */
1327         struct rcu_head         rcu;            /* kfree_rcu() overhead */
1328         int                     live;
1329 };
1330 
1331 struct ib_udata {
1332         const void __user *inbuf;
1333         void __user *outbuf;
1334         size_t       inlen;
1335         size_t       outlen;
1336 };
1337 
1338 struct ib_pd {
1339         u32                     local_dma_lkey;
1340         struct ib_device       *device;
1341         struct ib_uobject      *uobject;
1342         atomic_t                usecnt; /* count all resources */
1343         struct ib_mr           *local_mr;
1344 };
1345 
1346 struct ib_xrcd {
1347         struct ib_device       *device;
1348         atomic_t                usecnt; /* count all exposed resources */
1349         struct inode           *inode;
1350 
1351         struct mutex            tgt_qp_mutex;
1352         struct list_head        tgt_qp_list;
1353 };
1354 
1355 struct ib_ah {
1356         struct ib_device        *device;
1357         struct ib_pd            *pd;
1358         struct ib_uobject       *uobject;
1359 };
1360 
1361 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1362 
1363 enum ib_poll_context {
1364         IB_POLL_DIRECT,         /* caller context, no hw completions */
1365         IB_POLL_SOFTIRQ,        /* poll from softirq context */
1366         IB_POLL_WORKQUEUE,      /* poll from workqueue */
1367 };
1368 
1369 struct ib_cq {
1370         struct ib_device       *device;
1371         struct ib_uobject      *uobject;
1372         ib_comp_handler         comp_handler;
1373         void                  (*event_handler)(struct ib_event *, void *);
1374         void                   *cq_context;
1375         int                     cqe;
1376         atomic_t                usecnt; /* count number of work queues */
1377         enum ib_poll_context    poll_ctx;
1378         struct ib_wc            *wc;
1379         union {
1380                 struct irq_poll         iop;
1381                 struct work_struct      work;
1382         };
1383 };
1384 
1385 struct ib_srq {
1386         struct ib_device       *device;
1387         struct ib_pd           *pd;
1388         struct ib_uobject      *uobject;
1389         void                  (*event_handler)(struct ib_event *, void *);
1390         void                   *srq_context;
1391         enum ib_srq_type        srq_type;
1392         atomic_t                usecnt;
1393 
1394         union {
1395                 struct {
1396                         struct ib_xrcd *xrcd;
1397                         struct ib_cq   *cq;
1398                         u32             srq_num;
1399                 } xrc;
1400         } ext;
1401 };
1402 
1403 struct ib_qp {
1404         struct ib_device       *device;
1405         struct ib_pd           *pd;
1406         struct ib_cq           *send_cq;
1407         struct ib_cq           *recv_cq;
1408         struct ib_srq          *srq;
1409         struct ib_xrcd         *xrcd; /* XRC TGT QPs only */
1410         struct list_head        xrcd_list;
1411         /* count times opened, mcast attaches, flow attaches */
1412         atomic_t                usecnt;
1413         struct list_head        open_list;
1414         struct ib_qp           *real_qp;
1415         struct ib_uobject      *uobject;
1416         void                  (*event_handler)(struct ib_event *, void *);
1417         void                   *qp_context;
1418         u32                     qp_num;
1419         enum ib_qp_type         qp_type;
1420 };
1421 
1422 struct ib_mr {
1423         struct ib_device  *device;
1424         struct ib_pd      *pd;
1425         struct ib_uobject *uobject;
1426         u32                lkey;
1427         u32                rkey;
1428         u64                iova;
1429         u32                length;
1430         unsigned int       page_size;
1431 };
1432 
1433 struct ib_mw {
1434         struct ib_device        *device;
1435         struct ib_pd            *pd;
1436         struct ib_uobject       *uobject;
1437         u32                     rkey;
1438         enum ib_mw_type         type;
1439 };
1440 
1441 struct ib_fmr {
1442         struct ib_device        *device;
1443         struct ib_pd            *pd;
1444         struct list_head        list;
1445         u32                     lkey;
1446         u32                     rkey;
1447 };
1448 
1449 /* Supported steering options */
1450 enum ib_flow_attr_type {
1451         /* steering according to rule specifications */
1452         IB_FLOW_ATTR_NORMAL             = 0x0,
1453         /* default unicast and multicast rule -
1454          * receive all Eth traffic which isn't steered to any QP
1455          */
1456         IB_FLOW_ATTR_ALL_DEFAULT        = 0x1,
1457         /* default multicast rule -
1458          * receive all Eth multicast traffic which isn't steered to any QP
1459          */
1460         IB_FLOW_ATTR_MC_DEFAULT         = 0x2,
1461         /* sniffer rule - receive all port traffic */
1462         IB_FLOW_ATTR_SNIFFER            = 0x3
1463 };
1464 
1465 /* Supported steering header types */
1466 enum ib_flow_spec_type {
1467         /* L2 headers*/
1468         IB_FLOW_SPEC_ETH        = 0x20,
1469         IB_FLOW_SPEC_IB         = 0x22,
1470         /* L3 header*/
1471         IB_FLOW_SPEC_IPV4       = 0x30,
1472         /* L4 headers*/
1473         IB_FLOW_SPEC_TCP        = 0x40,
1474         IB_FLOW_SPEC_UDP        = 0x41
1475 };
1476 #define IB_FLOW_SPEC_LAYER_MASK 0xF0
1477 #define IB_FLOW_SPEC_SUPPORT_LAYERS 4
1478 
1479 /* Flow steering rule priority is set according to it's domain.
1480  * Lower domain value means higher priority.
1481  */
1482 enum ib_flow_domain {
1483         IB_FLOW_DOMAIN_USER,
1484         IB_FLOW_DOMAIN_ETHTOOL,
1485         IB_FLOW_DOMAIN_RFS,
1486         IB_FLOW_DOMAIN_NIC,
1487         IB_FLOW_DOMAIN_NUM /* Must be last */
1488 };
1489 
1490 struct ib_flow_eth_filter {
1491         u8      dst_mac[6];
1492         u8      src_mac[6];
1493         __be16  ether_type;
1494         __be16  vlan_tag;
1495 };
1496 
1497 struct ib_flow_spec_eth {
1498         enum ib_flow_spec_type    type;
1499         u16                       size;
1500         struct ib_flow_eth_filter val;
1501         struct ib_flow_eth_filter mask;
1502 };
1503 
1504 struct ib_flow_ib_filter {
1505         __be16 dlid;
1506         __u8   sl;
1507 };
1508 
1509 struct ib_flow_spec_ib {
1510         enum ib_flow_spec_type   type;
1511         u16                      size;
1512         struct ib_flow_ib_filter val;
1513         struct ib_flow_ib_filter mask;
1514 };
1515 
1516 struct ib_flow_ipv4_filter {
1517         __be32  src_ip;
1518         __be32  dst_ip;
1519 };
1520 
1521 struct ib_flow_spec_ipv4 {
1522         enum ib_flow_spec_type     type;
1523         u16                        size;
1524         struct ib_flow_ipv4_filter val;
1525         struct ib_flow_ipv4_filter mask;
1526 };
1527 
1528 struct ib_flow_tcp_udp_filter {
1529         __be16  dst_port;
1530         __be16  src_port;
1531 };
1532 
1533 struct ib_flow_spec_tcp_udp {
1534         enum ib_flow_spec_type        type;
1535         u16                           size;
1536         struct ib_flow_tcp_udp_filter val;
1537         struct ib_flow_tcp_udp_filter mask;
1538 };
1539 
1540 union ib_flow_spec {
1541         struct {
1542                 enum ib_flow_spec_type  type;
1543                 u16                     size;
1544         };
1545         struct ib_flow_spec_eth         eth;
1546         struct ib_flow_spec_ib          ib;
1547         struct ib_flow_spec_ipv4        ipv4;
1548         struct ib_flow_spec_tcp_udp     tcp_udp;
1549 };
1550 
1551 struct ib_flow_attr {
1552         enum ib_flow_attr_type type;
1553         u16          size;
1554         u16          priority;
1555         u32          flags;
1556         u8           num_of_specs;
1557         u8           port;
1558         /* Following are the optional layers according to user request
1559          * struct ib_flow_spec_xxx
1560          * struct ib_flow_spec_yyy
1561          */
1562 };
1563 
1564 struct ib_flow {
1565         struct ib_qp            *qp;
1566         struct ib_uobject       *uobject;
1567 };
1568 
1569 struct ib_mad_hdr;
1570 struct ib_grh;
1571 
1572 enum ib_process_mad_flags {
1573         IB_MAD_IGNORE_MKEY      = 1,
1574         IB_MAD_IGNORE_BKEY      = 2,
1575         IB_MAD_IGNORE_ALL       = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
1576 };
1577 
1578 enum ib_mad_result {
1579         IB_MAD_RESULT_FAILURE  = 0,      /* (!SUCCESS is the important flag) */
1580         IB_MAD_RESULT_SUCCESS  = 1 << 0, /* MAD was successfully processed   */
1581         IB_MAD_RESULT_REPLY    = 1 << 1, /* Reply packet needs to be sent    */
1582         IB_MAD_RESULT_CONSUMED = 1 << 2  /* Packet consumed: stop processing */
1583 };
1584 
1585 #define IB_DEVICE_NAME_MAX 64
1586 
1587 struct ib_cache {
1588         rwlock_t                lock;
1589         struct ib_event_handler event_handler;
1590         struct ib_pkey_cache  **pkey_cache;
1591         struct ib_gid_table   **gid_cache;
1592         u8                     *lmc_cache;
1593 };
1594 
1595 struct ib_dma_mapping_ops {
1596         int             (*mapping_error)(struct ib_device *dev,
1597                                          u64 dma_addr);
1598         u64             (*map_single)(struct ib_device *dev,
1599                                       void *ptr, size_t size,
1600                                       enum dma_data_direction direction);
1601         void            (*unmap_single)(struct ib_device *dev,
1602                                         u64 addr, size_t size,
1603                                         enum dma_data_direction direction);
1604         u64             (*map_page)(struct ib_device *dev,
1605                                     struct page *page, unsigned long offset,
1606                                     size_t size,
1607                                     enum dma_data_direction direction);
1608         void            (*unmap_page)(struct ib_device *dev,
1609                                       u64 addr, size_t size,
1610                                       enum dma_data_direction direction);
1611         int             (*map_sg)(struct ib_device *dev,
1612                                   struct scatterlist *sg, int nents,
1613                                   enum dma_data_direction direction);
1614         void            (*unmap_sg)(struct ib_device *dev,
1615                                     struct scatterlist *sg, int nents,
1616                                     enum dma_data_direction direction);
1617         void            (*sync_single_for_cpu)(struct ib_device *dev,
1618                                                u64 dma_handle,
1619                                                size_t size,
1620                                                enum dma_data_direction dir);
1621         void            (*sync_single_for_device)(struct ib_device *dev,
1622                                                   u64 dma_handle,
1623                                                   size_t size,
1624                                                   enum dma_data_direction dir);
1625         void            *(*alloc_coherent)(struct ib_device *dev,
1626                                            size_t size,
1627                                            u64 *dma_handle,
1628                                            gfp_t flag);
1629         void            (*free_coherent)(struct ib_device *dev,
1630                                          size_t size, void *cpu_addr,
1631                                          u64 dma_handle);
1632 };
1633 
1634 struct iw_cm_verbs;
1635 
1636 struct ib_port_immutable {
1637         int                           pkey_tbl_len;
1638         int                           gid_tbl_len;
1639         u32                           core_cap_flags;
1640         u32                           max_mad_size;
1641 };
1642 
1643 struct ib_device {
1644         struct device                *dma_device;
1645 
1646         char                          name[IB_DEVICE_NAME_MAX];
1647 
1648         struct list_head              event_handler_list;
1649         spinlock_t                    event_handler_lock;
1650 
1651         spinlock_t                    client_data_lock;
1652         struct list_head              core_list;
1653         /* Access to the client_data_list is protected by the client_data_lock
1654          * spinlock and the lists_rwsem read-write semaphore */
1655         struct list_head              client_data_list;
1656 
1657         struct ib_cache               cache;
1658         /**
1659          * port_immutable is indexed by port number
1660          */
1661         struct ib_port_immutable     *port_immutable;
1662 
1663         int                           num_comp_vectors;
1664 
1665         struct iw_cm_verbs           *iwcm;
1666 
1667         int                        (*get_protocol_stats)(struct ib_device *device,
1668                                                          union rdma_protocol_stats *stats);
1669         int                        (*query_device)(struct ib_device *device,
1670                                                    struct ib_device_attr *device_attr,
1671                                                    struct ib_udata *udata);
1672         int                        (*query_port)(struct ib_device *device,
1673                                                  u8 port_num,
1674                                                  struct ib_port_attr *port_attr);
1675         enum rdma_link_layer       (*get_link_layer)(struct ib_device *device,
1676                                                      u8 port_num);
1677         /* When calling get_netdev, the HW vendor's driver should return the
1678          * net device of device @device at port @port_num or NULL if such
1679          * a net device doesn't exist. The vendor driver should call dev_hold
1680          * on this net device. The HW vendor's device driver must guarantee
1681          * that this function returns NULL before the net device reaches
1682          * NETDEV_UNREGISTER_FINAL state.
1683          */
1684         struct net_device         *(*get_netdev)(struct ib_device *device,
1685                                                  u8 port_num);
1686         int                        (*query_gid)(struct ib_device *device,
1687                                                 u8 port_num, int index,
1688                                                 union ib_gid *gid);
1689         /* When calling add_gid, the HW vendor's driver should
1690          * add the gid of device @device at gid index @index of
1691          * port @port_num to be @gid. Meta-info of that gid (for example,
1692          * the network device related to this gid is available
1693          * at @attr. @context allows the HW vendor driver to store extra
1694          * information together with a GID entry. The HW vendor may allocate
1695          * memory to contain this information and store it in @context when a
1696          * new GID entry is written to. Params are consistent until the next
1697          * call of add_gid or delete_gid. The function should return 0 on
1698          * success or error otherwise. The function could be called
1699          * concurrently for different ports. This function is only called
1700          * when roce_gid_table is used.
1701          */
1702         int                        (*add_gid)(struct ib_device *device,
1703                                               u8 port_num,
1704                                               unsigned int index,
1705                                               const union ib_gid *gid,
1706                                               const struct ib_gid_attr *attr,
1707                                               void **context);
1708         /* When calling del_gid, the HW vendor's driver should delete the
1709          * gid of device @device at gid index @index of port @port_num.
1710          * Upon the deletion of a GID entry, the HW vendor must free any
1711          * allocated memory. The caller will clear @context afterwards.
1712          * This function is only called when roce_gid_table is used.
1713          */
1714         int                        (*del_gid)(struct ib_device *device,
1715                                               u8 port_num,
1716                                               unsigned int index,
1717                                               void **context);
1718         int                        (*query_pkey)(struct ib_device *device,
1719                                                  u8 port_num, u16 index, u16 *pkey);
1720         int                        (*modify_device)(struct ib_device *device,
1721                                                     int device_modify_mask,
1722                                                     struct ib_device_modify *device_modify);
1723         int                        (*modify_port)(struct ib_device *device,
1724                                                   u8 port_num, int port_modify_mask,
1725                                                   struct ib_port_modify *port_modify);
1726         struct ib_ucontext *       (*alloc_ucontext)(struct ib_device *device,
1727                                                      struct ib_udata *udata);
1728         int                        (*dealloc_ucontext)(struct ib_ucontext *context);
1729         int                        (*mmap)(struct ib_ucontext *context,
1730                                            struct vm_area_struct *vma);
1731         struct ib_pd *             (*alloc_pd)(struct ib_device *device,
1732                                                struct ib_ucontext *context,
1733                                                struct ib_udata *udata);
1734         int                        (*dealloc_pd)(struct ib_pd *pd);
1735         struct ib_ah *             (*create_ah)(struct ib_pd *pd,
1736                                                 struct ib_ah_attr *ah_attr);
1737         int                        (*modify_ah)(struct ib_ah *ah,
1738                                                 struct ib_ah_attr *ah_attr);
1739         int                        (*query_ah)(struct ib_ah *ah,
1740                                                struct ib_ah_attr *ah_attr);
1741         int                        (*destroy_ah)(struct ib_ah *ah);
1742         struct ib_srq *            (*create_srq)(struct ib_pd *pd,
1743                                                  struct ib_srq_init_attr *srq_init_attr,
1744                                                  struct ib_udata *udata);
1745         int                        (*modify_srq)(struct ib_srq *srq,
1746                                                  struct ib_srq_attr *srq_attr,
1747                                                  enum ib_srq_attr_mask srq_attr_mask,
1748                                                  struct ib_udata *udata);
1749         int                        (*query_srq)(struct ib_srq *srq,
1750                                                 struct ib_srq_attr *srq_attr);
1751         int                        (*destroy_srq)(struct ib_srq *srq);
1752         int                        (*post_srq_recv)(struct ib_srq *srq,
1753                                                     struct ib_recv_wr *recv_wr,
1754                                                     struct ib_recv_wr **bad_recv_wr);
1755         struct ib_qp *             (*create_qp)(struct ib_pd *pd,
1756                                                 struct ib_qp_init_attr *qp_init_attr,
1757                                                 struct ib_udata *udata);
1758         int                        (*modify_qp)(struct ib_qp *qp,
1759                                                 struct ib_qp_attr *qp_attr,
1760                                                 int qp_attr_mask,
1761                                                 struct ib_udata *udata);
1762         int                        (*query_qp)(struct ib_qp *qp,
1763                                                struct ib_qp_attr *qp_attr,
1764                                                int qp_attr_mask,
1765                                                struct ib_qp_init_attr *qp_init_attr);
1766         int                        (*destroy_qp)(struct ib_qp *qp);
1767         int                        (*post_send)(struct ib_qp *qp,
1768                                                 struct ib_send_wr *send_wr,
1769                                                 struct ib_send_wr **bad_send_wr);
1770         int                        (*post_recv)(struct ib_qp *qp,
1771                                                 struct ib_recv_wr *recv_wr,
1772                                                 struct ib_recv_wr **bad_recv_wr);
1773         struct ib_cq *             (*create_cq)(struct ib_device *device,
1774                                                 const struct ib_cq_init_attr *attr,
1775                                                 struct ib_ucontext *context,
1776                                                 struct ib_udata *udata);
1777         int                        (*modify_cq)(struct ib_cq *cq, u16 cq_count,
1778                                                 u16 cq_period);
1779         int                        (*destroy_cq)(struct ib_cq *cq);
1780         int                        (*resize_cq)(struct ib_cq *cq, int cqe,
1781                                                 struct ib_udata *udata);
1782         int                        (*poll_cq)(struct ib_cq *cq, int num_entries,
1783                                               struct ib_wc *wc);
1784         int                        (*peek_cq)(struct ib_cq *cq, int wc_cnt);
1785         int                        (*req_notify_cq)(struct ib_cq *cq,
1786                                                     enum ib_cq_notify_flags flags);
1787         int                        (*req_ncomp_notif)(struct ib_cq *cq,
1788                                                       int wc_cnt);
1789         struct ib_mr *             (*get_dma_mr)(struct ib_pd *pd,
1790                                                  int mr_access_flags);
1791         struct ib_mr *             (*reg_user_mr)(struct ib_pd *pd,
1792                                                   u64 start, u64 length,
1793                                                   u64 virt_addr,
1794                                                   int mr_access_flags,
1795                                                   struct ib_udata *udata);
1796         int                        (*rereg_user_mr)(struct ib_mr *mr,
1797                                                     int flags,
1798                                                     u64 start, u64 length,
1799                                                     u64 virt_addr,
1800                                                     int mr_access_flags,
1801                                                     struct ib_pd *pd,
1802                                                     struct ib_udata *udata);
1803         int                        (*dereg_mr)(struct ib_mr *mr);
1804         struct ib_mr *             (*alloc_mr)(struct ib_pd *pd,
1805                                                enum ib_mr_type mr_type,
1806                                                u32 max_num_sg);
1807         int                        (*map_mr_sg)(struct ib_mr *mr,
1808                                                 struct scatterlist *sg,
1809                                                 int sg_nents);
1810         struct ib_mw *             (*alloc_mw)(struct ib_pd *pd,
1811                                                enum ib_mw_type type);
1812         int                        (*dealloc_mw)(struct ib_mw *mw);
1813         struct ib_fmr *            (*alloc_fmr)(struct ib_pd *pd,
1814                                                 int mr_access_flags,
1815                                                 struct ib_fmr_attr *fmr_attr);
1816         int                        (*map_phys_fmr)(struct ib_fmr *fmr,
1817                                                    u64 *page_list, int list_len,
1818                                                    u64 iova);
1819         int                        (*unmap_fmr)(struct list_head *fmr_list);
1820         int                        (*dealloc_fmr)(struct ib_fmr *fmr);
1821         int                        (*attach_mcast)(struct ib_qp *qp,
1822                                                    union ib_gid *gid,
1823                                                    u16 lid);
1824         int                        (*detach_mcast)(struct ib_qp *qp,
1825                                                    union ib_gid *gid,
1826                                                    u16 lid);
1827         int                        (*process_mad)(struct ib_device *device,
1828                                                   int process_mad_flags,
1829                                                   u8 port_num,
1830                                                   const struct ib_wc *in_wc,
1831                                                   const struct ib_grh *in_grh,
1832                                                   const struct ib_mad_hdr *in_mad,
1833                                                   size_t in_mad_size,
1834                                                   struct ib_mad_hdr *out_mad,
1835                                                   size_t *out_mad_size,
1836                                                   u16 *out_mad_pkey_index);
1837         struct ib_xrcd *           (*alloc_xrcd)(struct ib_device *device,
1838                                                  struct ib_ucontext *ucontext,
1839                                                  struct ib_udata *udata);
1840         int                        (*dealloc_xrcd)(struct ib_xrcd *xrcd);
1841         struct ib_flow *           (*create_flow)(struct ib_qp *qp,
1842                                                   struct ib_flow_attr
1843                                                   *flow_attr,
1844                                                   int domain);
1845         int                        (*destroy_flow)(struct ib_flow *flow_id);
1846         int                        (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
1847                                                       struct ib_mr_status *mr_status);
1848         void                       (*disassociate_ucontext)(struct ib_ucontext *ibcontext);
1849 
1850         struct ib_dma_mapping_ops   *dma_ops;
1851 
1852         struct module               *owner;
1853         struct device                dev;
1854         struct kobject               *ports_parent;
1855         struct list_head             port_list;
1856 
1857         enum {
1858                 IB_DEV_UNINITIALIZED,
1859                 IB_DEV_REGISTERED,
1860                 IB_DEV_UNREGISTERED
1861         }                            reg_state;
1862 
1863         int                          uverbs_abi_ver;
1864         u64                          uverbs_cmd_mask;
1865         u64                          uverbs_ex_cmd_mask;
1866 
1867         char                         node_desc[64];
1868         __be64                       node_guid;
1869         u32                          local_dma_lkey;
1870         u16                          is_switch:1;
1871         u8                           node_type;
1872         u8                           phys_port_cnt;
1873         struct ib_device_attr        attrs;
1874 
1875         /**
1876          * The following mandatory functions are used only at device
1877          * registration.  Keep functions such as these at the end of this
1878          * structure to avoid cache line misses when accessing struct ib_device
1879          * in fast paths.
1880          */
1881         int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *);
1882 };
1883 
1884 struct ib_client {
1885         char  *name;
1886         void (*add)   (struct ib_device *);
1887         void (*remove)(struct ib_device *, void *client_data);
1888 
1889         /* Returns the net_dev belonging to this ib_client and matching the
1890          * given parameters.
1891          * @dev:         An RDMA device that the net_dev use for communication.
1892          * @port:        A physical port number on the RDMA device.
1893          * @pkey:        P_Key that the net_dev uses if applicable.
1894          * @gid:         A GID that the net_dev uses to communicate.
1895          * @addr:        An IP address the net_dev is configured with.
1896          * @client_data: The device's client data set by ib_set_client_data().
1897          *
1898          * An ib_client that implements a net_dev on top of RDMA devices
1899          * (such as IP over IB) should implement this callback, allowing the
1900          * rdma_cm module to find the right net_dev for a given request.
1901          *
1902          * The caller is responsible for calling dev_put on the returned
1903          * netdev. */
1904         struct net_device *(*get_net_dev_by_params)(
1905                         struct ib_device *dev,
1906                         u8 port,
1907                         u16 pkey,
1908                         const union ib_gid *gid,
1909                         const struct sockaddr *addr,
1910                         void *client_data);
1911         struct list_head list;
1912 };
1913 
1914 struct ib_device *ib_alloc_device(size_t size);
1915 void ib_dealloc_device(struct ib_device *device);
1916 
1917 int ib_register_device(struct ib_device *device,
1918                        int (*port_callback)(struct ib_device *,
1919                                             u8, struct kobject *));
1920 void ib_unregister_device(struct ib_device *device);
1921 
1922 int ib_register_client   (struct ib_client *client);
1923 void ib_unregister_client(struct ib_client *client);
1924 
1925 void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
1926 void  ib_set_client_data(struct ib_device *device, struct ib_client *client,
1927                          void *data);
1928 
1929 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
1930 {
1931         return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
1932 }
1933 
1934 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
1935 {
1936         return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
1937 }
1938 
1939 static inline bool ib_is_udata_cleared(struct ib_udata *udata,
1940                                        size_t offset,
1941                                        size_t len)
1942 {
1943         const void __user *p = udata->inbuf + offset;
1944         bool ret = false;
1945         u8 *buf;
1946 
1947         if (len > USHRT_MAX)
1948                 return false;
1949 
1950         buf = kmalloc(len, GFP_KERNEL);
1951         if (!buf)
1952                 return false;
1953 
1954         if (copy_from_user(buf, p, len))
1955                 goto free;
1956 
1957         ret = !memchr_inv(buf, 0, len);
1958 
1959 free:
1960         kfree(buf);
1961         return ret;
1962 }
1963 
1964 /**
1965  * ib_modify_qp_is_ok - Check that the supplied attribute mask
1966  * contains all required attributes and no attributes not allowed for
1967  * the given QP state transition.
1968  * @cur_state: Current QP state
1969  * @next_state: Next QP state
1970  * @type: QP type
1971  * @mask: Mask of supplied QP attributes
1972  * @ll : link layer of port
1973  *
1974  * This function is a helper function that a low-level driver's
1975  * modify_qp method can use to validate the consumer's input.  It
1976  * checks that cur_state and next_state are valid QP states, that a
1977  * transition from cur_state to next_state is allowed by the IB spec,
1978  * and that the attribute mask supplied is allowed for the transition.
1979  */
1980 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1981                        enum ib_qp_type type, enum ib_qp_attr_mask mask,
1982                        enum rdma_link_layer ll);
1983 
1984 int ib_register_event_handler  (struct ib_event_handler *event_handler);
1985 int ib_unregister_event_handler(struct ib_event_handler *event_handler);
1986 void ib_dispatch_event(struct ib_event *event);
1987 
1988 int ib_query_port(struct ib_device *device,
1989                   u8 port_num, struct ib_port_attr *port_attr);
1990 
1991 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
1992                                                u8 port_num);
1993 
1994 /**
1995  * rdma_cap_ib_switch - Check if the device is IB switch
1996  * @device: Device to check
1997  *
1998  * Device driver is responsible for setting is_switch bit on
1999  * in ib_device structure at init time.
2000  *
2001  * Return: true if the device is IB switch.
2002  */
2003 static inline bool rdma_cap_ib_switch(const struct ib_device *device)
2004 {
2005         return device->is_switch;
2006 }
2007 
2008 /**
2009  * rdma_start_port - Return the first valid port number for the device
2010  * specified
2011  *
2012  * @device: Device to be checked
2013  *
2014  * Return start port number
2015  */
2016 static inline u8 rdma_start_port(const struct ib_device *device)
2017 {
2018         return rdma_cap_ib_switch(device) ? 0 : 1;
2019 }
2020 
2021 /**
2022  * rdma_end_port - Return the last valid port number for the device
2023  * specified
2024  *
2025  * @device: Device to be checked
2026  *
2027  * Return last port number
2028  */
2029 static inline u8 rdma_end_port(const struct ib_device *device)
2030 {
2031         return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
2032 }
2033 
2034 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num)
2035 {
2036         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB;
2037 }
2038 
2039 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num)
2040 {
2041         return device->port_immutable[port_num].core_cap_flags &
2042                 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP);
2043 }
2044 
2045 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device, u8 port_num)
2046 {
2047         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
2048 }
2049 
2050 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device, u8 port_num)
2051 {
2052         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE;
2053 }
2054 
2055 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num)
2056 {
2057         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP;
2058 }
2059 
2060 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num)
2061 {
2062         return rdma_protocol_ib(device, port_num) ||
2063                 rdma_protocol_roce(device, port_num);
2064 }
2065 
2066 /**
2067  * rdma_cap_ib_mad - Check if the port of a device supports Infiniband
2068  * Management Datagrams.
2069  * @device: Device to check
2070  * @port_num: Port number to check
2071  *
2072  * Management Datagrams (MAD) are a required part of the InfiniBand
2073  * specification and are supported on all InfiniBand devices.  A slightly
2074  * extended version are also supported on OPA interfaces.
2075  *
2076  * Return: true if the port supports sending/receiving of MAD packets.
2077  */
2078 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num)
2079 {
2080         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_MAD;
2081 }
2082 
2083 /**
2084  * rdma_cap_opa_mad - Check if the port of device provides support for OPA
2085  * Management Datagrams.
2086  * @device: Device to check
2087  * @port_num: Port number to check
2088  *
2089  * Intel OmniPath devices extend and/or replace the InfiniBand Management
2090  * datagrams with their own versions.  These OPA MADs share many but not all of
2091  * the characteristics of InfiniBand MADs.
2092  *
2093  * OPA MADs differ in the following ways:
2094  *
2095  *    1) MADs are variable size up to 2K
2096  *       IBTA defined MADs remain fixed at 256 bytes
2097  *    2) OPA SMPs must carry valid PKeys
2098  *    3) OPA SMP packets are a different format
2099  *
2100  * Return: true if the port supports OPA MAD packet formats.
2101  */
2102 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num)
2103 {
2104         return (device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_OPA_MAD)
2105                 == RDMA_CORE_CAP_OPA_MAD;
2106 }
2107 
2108 /**
2109  * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband
2110  * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI).
2111  * @device: Device to check
2112  * @port_num: Port number to check
2113  *
2114  * Each InfiniBand node is required to provide a Subnet Management Agent
2115  * that the subnet manager can access.  Prior to the fabric being fully
2116  * configured by the subnet manager, the SMA is accessed via a well known
2117  * interface called the Subnet Management Interface (SMI).  This interface
2118  * uses directed route packets to communicate with the SM to get around the
2119  * chicken and egg problem of the SM needing to know what's on the fabric
2120  * in order to configure the fabric, and needing to configure the fabric in
2121  * order to send packets to the devices on the fabric.  These directed
2122  * route packets do not need the fabric fully configured in order to reach
2123  * their destination.  The SMI is the only method allowed to send
2124  * directed route packets on an InfiniBand fabric.
2125  *
2126  * Return: true if the port provides an SMI.
2127  */
2128 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num)
2129 {
2130         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SMI;
2131 }
2132 
2133 /**
2134  * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband
2135  * Communication Manager.
2136  * @device: Device to check
2137  * @port_num: Port number to check
2138  *
2139  * The InfiniBand Communication Manager is one of many pre-defined General
2140  * Service Agents (GSA) that are accessed via the General Service
2141  * Interface (GSI).  It's role is to facilitate establishment of connections
2142  * between nodes as well as other management related tasks for established
2143  * connections.
2144  *
2145  * Return: true if the port supports an IB CM (this does not guarantee that
2146  * a CM is actually running however).
2147  */
2148 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num)
2149 {
2150         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_CM;
2151 }
2152 
2153 /**
2154  * rdma_cap_iw_cm - Check if the port of device has the capability IWARP
2155  * Communication Manager.
2156  * @device: Device to check
2157  * @port_num: Port number to check
2158  *
2159  * Similar to above, but specific to iWARP connections which have a different
2160  * managment protocol than InfiniBand.
2161  *
2162  * Return: true if the port supports an iWARP CM (this does not guarantee that
2163  * a CM is actually running however).
2164  */
2165 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num)
2166 {
2167         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IW_CM;
2168 }
2169 
2170 /**
2171  * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband
2172  * Subnet Administration.
2173  * @device: Device to check
2174  * @port_num: Port number to check
2175  *
2176  * An InfiniBand Subnet Administration (SA) service is a pre-defined General
2177  * Service Agent (GSA) provided by the Subnet Manager (SM).  On InfiniBand
2178  * fabrics, devices should resolve routes to other hosts by contacting the
2179  * SA to query the proper route.
2180  *
2181  * Return: true if the port should act as a client to the fabric Subnet
2182  * Administration interface.  This does not imply that the SA service is
2183  * running locally.
2184  */
2185 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num)
2186 {
2187         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SA;
2188 }
2189 
2190 /**
2191  * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband
2192  * Multicast.
2193  * @device: Device to check
2194  * @port_num: Port number to check
2195  *
2196  * InfiniBand multicast registration is more complex than normal IPv4 or
2197  * IPv6 multicast registration.  Each Host Channel Adapter must register
2198  * with the Subnet Manager when it wishes to join a multicast group.  It
2199  * should do so only once regardless of how many queue pairs it subscribes
2200  * to this group.  And it should leave the group only after all queue pairs
2201  * attached to the group have been detached.
2202  *
2203  * Return: true if the port must undertake the additional adminstrative
2204  * overhead of registering/unregistering with the SM and tracking of the
2205  * total number of queue pairs attached to the multicast group.
2206  */
2207 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num)
2208 {
2209         return rdma_cap_ib_sa(device, port_num);
2210 }
2211 
2212 /**
2213  * rdma_cap_af_ib - Check if the port of device has the capability
2214  * Native Infiniband Address.
2215  * @device: Device to check
2216  * @port_num: Port number to check
2217  *
2218  * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default
2219  * GID.  RoCE uses a different mechanism, but still generates a GID via
2220  * a prescribed mechanism and port specific data.
2221  *
2222  * Return: true if the port uses a GID address to identify devices on the
2223  * network.
2224  */
2225 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num)
2226 {
2227         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_AF_IB;
2228 }
2229 
2230 /**
2231  * rdma_cap_eth_ah - Check if the port of device has the capability
2232  * Ethernet Address Handle.
2233  * @device: Device to check
2234  * @port_num: Port number to check
2235  *
2236  * RoCE is InfiniBand over Ethernet, and it uses a well defined technique
2237  * to fabricate GIDs over Ethernet/IP specific addresses native to the
2238  * port.  Normally, packet headers are generated by the sending host
2239  * adapter, but when sending connectionless datagrams, we must manually
2240  * inject the proper headers for the fabric we are communicating over.
2241  *
2242  * Return: true if we are running as a RoCE port and must force the
2243  * addition of a Global Route Header built from our Ethernet Address
2244  * Handle into our header list for connectionless packets.
2245  */
2246 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
2247 {
2248         return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH;
2249 }
2250 
2251 /**
2252  * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
2253  *
2254  * @device: Device
2255  * @port_num: Port number
2256  *
2257  * This MAD size includes the MAD headers and MAD payload.  No other headers
2258  * are included.
2259  *
2260  * Return the max MAD size required by the Port.  Will return 0 if the port
2261  * does not support MADs
2262  */
2263 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num)
2264 {
2265         return device->port_immutable[port_num].max_mad_size;
2266 }
2267 
2268 /**
2269  * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
2270  * @device: Device to check
2271  * @port_num: Port number to check
2272  *
2273  * RoCE GID table mechanism manages the various GIDs for a device.
2274  *
2275  * NOTE: if allocating the port's GID table has failed, this call will still
2276  * return true, but any RoCE GID table API will fail.
2277  *
2278  * Return: true if the port uses RoCE GID table mechanism in order to manage
2279  * its GIDs.
2280  */
2281 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
2282                                            u8 port_num)
2283 {
2284         return rdma_protocol_roce(device, port_num) &&
2285                 device->add_gid && device->del_gid;
2286 }
2287 
2288 int ib_query_gid(struct ib_device *device,
2289                  u8 port_num, int index, union ib_gid *gid,
2290                  struct ib_gid_attr *attr);
2291 
2292 int ib_query_pkey(struct ib_device *device,
2293                   u8 port_num, u16 index, u16 *pkey);
2294 
2295 int ib_modify_device(struct ib_device *device,
2296                      int device_modify_mask,
2297                      struct ib_device_modify *device_modify);
2298 
2299 int ib_modify_port(struct ib_device *device,
2300                    u8 port_num, int port_modify_mask,
2301                    struct ib_port_modify *port_modify);
2302 
2303 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
2304                 enum ib_gid_type gid_type, struct net_device *ndev,
2305                 u8 *port_num, u16 *index);
2306 
2307 int ib_find_pkey(struct ib_device *device,
2308                  u8 port_num, u16 pkey, u16 *index);
2309 
2310 struct ib_pd *ib_alloc_pd(struct ib_device *device);
2311 
2312 void ib_dealloc_pd(struct ib_pd *pd);
2313 
2314 /**
2315  * ib_create_ah - Creates an address handle for the given address vector.
2316  * @pd: The protection domain associated with the address handle.
2317  * @ah_attr: The attributes of the address vector.
2318  *
2319  * The address handle is used to reference a local or global destination
2320  * in all UD QP post sends.
2321  */
2322 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
2323 
2324 /**
2325  * ib_init_ah_from_wc - Initializes address handle attributes from a
2326  *   work completion.
2327  * @device: Device on which the received message arrived.
2328  * @port_num: Port on which the received message arrived.
2329  * @wc: Work completion associated with the received message.
2330  * @grh: References the received global route header.  This parameter is
2331  *   ignored unless the work completion indicates that the GRH is valid.
2332  * @ah_attr: Returned attributes that can be used when creating an address
2333  *   handle for replying to the message.
2334  */
2335 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
2336                        const struct ib_wc *wc, const struct ib_grh *grh,
2337                        struct ib_ah_attr *ah_attr);
2338 
2339 /**
2340  * ib_create_ah_from_wc - Creates an address handle associated with the
2341  *   sender of the specified work completion.
2342  * @pd: The protection domain associated with the address handle.
2343  * @wc: Work completion information associated with a received message.
2344  * @grh: References the received global route header.  This parameter is
2345  *   ignored unless the work completion indicates that the GRH is valid.
2346  * @port_num: The outbound port number to associate with the address.
2347  *
2348  * The address handle is used to reference a local or global destination
2349  * in all UD QP post sends.
2350  */
2351 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
2352                                    const struct ib_grh *grh, u8 port_num);
2353 
2354 /**
2355  * ib_modify_ah - Modifies the address vector associated with an address
2356  *   handle.
2357  * @ah: The address handle to modify.
2358  * @ah_attr: The new address vector attributes to associate with the
2359  *   address handle.
2360  */
2361 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2362 
2363 /**
2364  * ib_query_ah - Queries the address vector associated with an address
2365  *   handle.
2366  * @ah: The address handle to query.
2367  * @ah_attr: The address vector attributes associated with the address
2368  *   handle.
2369  */
2370 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2371 
2372 /**
2373  * ib_destroy_ah - Destroys an address handle.
2374  * @ah: The address handle to destroy.
2375  */
2376 int ib_destroy_ah(struct ib_ah *ah);
2377 
2378 /**
2379  * ib_create_srq - Creates a SRQ associated with the specified protection
2380  *   domain.
2381  * @pd: The protection domain associated with the SRQ.
2382  * @srq_init_attr: A list of initial attributes required to create the
2383  *   SRQ.  If SRQ creation succeeds, then the attributes are updated to
2384  *   the actual capabilities of the created SRQ.
2385  *
2386  * srq_attr->max_wr and srq_attr->max_sge are read the determine the
2387  * requested size of the SRQ, and set to the actual values allocated
2388  * on return.  If ib_create_srq() succeeds, then max_wr and max_sge
2389  * will always be at least as large as the requested values.
2390  */
2391 struct ib_srq *ib_create_srq(struct ib_pd *pd,
2392                              struct ib_srq_init_attr *srq_init_attr);
2393 
2394 /**
2395  * ib_modify_srq - Modifies the attributes for the specified SRQ.
2396  * @srq: The SRQ to modify.
2397  * @srq_attr: On input, specifies the SRQ attributes to modify.  On output,
2398  *   the current values of selected SRQ attributes are returned.
2399  * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
2400  *   are being modified.
2401  *
2402  * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
2403  * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
2404  * the number of receives queued drops below the limit.
2405  */
2406 int ib_modify_srq(struct ib_srq *srq,
2407                   struct ib_srq_attr *srq_attr,
2408                   enum ib_srq_attr_mask srq_attr_mask);
2409 
2410 /**
2411  * ib_query_srq - Returns the attribute list and current values for the
2412  *   specified SRQ.
2413  * @srq: The SRQ to query.
2414  * @srq_attr: The attributes of the specified SRQ.
2415  */
2416 int ib_query_srq(struct ib_srq *srq,
2417                  struct ib_srq_attr *srq_attr);
2418 
2419 /**
2420  * ib_destroy_srq - Destroys the specified SRQ.
2421  * @srq: The SRQ to destroy.
2422  */
2423 int ib_destroy_srq(struct ib_srq *srq);
2424 
2425 /**
2426  * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
2427  * @srq: The SRQ to post the work request on.
2428  * @recv_wr: A list of work requests to post on the receive queue.
2429  * @bad_recv_wr: On an immediate failure, this parameter will reference
2430  *   the work request that failed to be posted on the QP.
2431  */
2432 static inline int ib_post_srq_recv(struct ib_srq *srq,
2433                                    struct ib_recv_wr *recv_wr,
2434                                    struct ib_recv_wr **bad_recv_wr)
2435 {
2436         return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
2437 }
2438 
2439 /**
2440  * ib_create_qp - Creates a QP associated with the specified protection
2441  *   domain.
2442  * @pd: The protection domain associated with the QP.
2443  * @qp_init_attr: A list of initial attributes required to create the
2444  *   QP.  If QP creation succeeds, then the attributes are updated to
2445  *   the actual capabilities of the created QP.
2446  */
2447 struct ib_qp *ib_create_qp(struct ib_pd *pd,
2448                            struct ib_qp_init_attr *qp_init_attr);
2449 
2450 /**
2451  * ib_modify_qp - Modifies the attributes for the specified QP and then
2452  *   transitions the QP to the given state.
2453  * @qp: The QP to modify.
2454  * @qp_attr: On input, specifies the QP attributes to modify.  On output,
2455  *   the current values of selected QP attributes are returned.
2456  * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
2457  *   are being modified.
2458  */
2459 int ib_modify_qp(struct ib_qp *qp,
2460                  struct ib_qp_attr *qp_attr,
2461                  int qp_attr_mask);
2462 
2463 /**
2464  * ib_query_qp - Returns the attribute list and current values for the
2465  *   specified QP.
2466  * @qp: The QP to query.
2467  * @qp_attr: The attributes of the specified QP.
2468  * @qp_attr_mask: A bit-mask used to select specific attributes to query.
2469  * @qp_init_attr: Additional attributes of the selected QP.
2470  *
2471  * The qp_attr_mask may be used to limit the query to gathering only the
2472  * selected attributes.
2473  */
2474 int ib_query_qp(struct ib_qp *qp,
2475                 struct ib_qp_attr *qp_attr,
2476                 int qp_attr_mask,
2477                 struct ib_qp_init_attr *qp_init_attr);
2478 
2479 /**
2480  * ib_destroy_qp - Destroys the specified QP.
2481  * @qp: The QP to destroy.
2482  */
2483 int ib_destroy_qp(struct ib_qp *qp);
2484 
2485 /**
2486  * ib_open_qp - Obtain a reference to an existing sharable QP.
2487  * @xrcd - XRC domain
2488  * @qp_open_attr: Attributes identifying the QP to open.
2489  *
2490  * Returns a reference to a sharable QP.
2491  */
2492 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
2493                          struct ib_qp_open_attr *qp_open_attr);
2494 
2495 /**
2496  * ib_close_qp - Release an external reference to a QP.
2497  * @qp: The QP handle to release
2498  *
2499  * The opened QP handle is released by the caller.  The underlying
2500  * shared QP is not destroyed until all internal references are released.
2501  */
2502 int ib_close_qp(struct ib_qp *qp);
2503 
2504 /**
2505  * ib_post_send - Posts a list of work requests to the send queue of
2506  *   the specified QP.
2507  * @qp: The QP to post the work request on.
2508  * @send_wr: A list of work requests to post on the send queue.
2509  * @bad_send_wr: On an immediate failure, this parameter will reference
2510  *   the work request that failed to be posted on the QP.
2511  *
2512  * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
2513  * error is returned, the QP state shall not be affected,
2514  * ib_post_send() will return an immediate error after queueing any
2515  * earlier work requests in the list.
2516  */
2517 static inline int ib_post_send(struct ib_qp *qp,
2518                                struct ib_send_wr *send_wr,
2519                                struct ib_send_wr **bad_send_wr)
2520 {
2521         return qp->device->post_send(qp, send_wr, bad_send_wr);
2522 }
2523 
2524 /**
2525  * ib_post_recv - Posts a list of work requests to the receive queue of
2526  *   the specified QP.
2527  * @qp: The QP to post the work request on.
2528  * @recv_wr: A list of work requests to post on the receive queue.
2529  * @bad_recv_wr: On an immediate failure, this parameter will reference
2530  *   the work request that failed to be posted on the QP.
2531  */
2532 static inline int ib_post_recv(struct ib_qp *qp,
2533                                struct ib_recv_wr *recv_wr,
2534                                struct ib_recv_wr **bad_recv_wr)
2535 {
2536         return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
2537 }
2538 
2539 struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private,
2540                 int nr_cqe, int comp_vector, enum ib_poll_context poll_ctx);
2541 void ib_free_cq(struct ib_cq *cq);
2542 int ib_process_cq_direct(struct ib_cq *cq, int budget);
2543 
2544 /**
2545  * ib_create_cq - Creates a CQ on the specified device.
2546  * @device: The device on which to create the CQ.
2547  * @comp_handler: A user-specified callback that is invoked when a
2548  *   completion event occurs on the CQ.
2549  * @event_handler: A user-specified callback that is invoked when an
2550  *   asynchronous event not associated with a completion occurs on the CQ.
2551  * @cq_context: Context associated with the CQ returned to the user via
2552  *   the associated completion and event handlers.
2553  * @cq_attr: The attributes the CQ should be created upon.
2554  *
2555  * Users can examine the cq structure to determine the actual CQ size.
2556  */
2557 struct ib_cq *ib_create_cq(struct ib_device *device,
2558                            ib_comp_handler comp_handler,
2559                            void (*event_handler)(struct ib_event *, void *),
2560                            void *cq_context,
2561                            const struct ib_cq_init_attr *cq_attr);
2562 
2563 /**
2564  * ib_resize_cq - Modifies the capacity of the CQ.
2565  * @cq: The CQ to resize.
2566  * @cqe: The minimum size of the CQ.
2567  *
2568  * Users can examine the cq structure to determine the actual CQ size.
2569  */
2570 int ib_resize_cq(struct ib_cq *cq, int cqe);
2571 
2572 /**
2573  * ib_modify_cq - Modifies moderation params of the CQ
2574  * @cq: The CQ to modify.
2575  * @cq_count: number of CQEs that will trigger an event
2576  * @cq_period: max period of time in usec before triggering an event
2577  *
2578  */
2579 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
2580 
2581 /**
2582  * ib_destroy_cq - Destroys the specified CQ.
2583  * @cq: The CQ to destroy.
2584  */
2585 int ib_destroy_cq(struct ib_cq *cq);
2586 
2587 /**
2588  * ib_poll_cq - poll a CQ for completion(s)
2589  * @cq:the CQ being polled
2590  * @num_entries:maximum number of completions to return
2591  * @wc:array of at least @num_entries &struct ib_wc where completions
2592  *   will be returned
2593  *
2594  * Poll a CQ for (possibly multiple) completions.  If the return value
2595  * is < 0, an error occurred.  If the return value is >= 0, it is the
2596  * number of completions returned.  If the return value is
2597  * non-negative and < num_entries, then the CQ was emptied.
2598  */
2599 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
2600                              struct ib_wc *wc)
2601 {
2602         return cq->device->poll_cq(cq, num_entries, wc);
2603 }
2604 
2605 /**
2606  * ib_peek_cq - Returns the number of unreaped completions currently
2607  *   on the specified CQ.
2608  * @cq: The CQ to peek.
2609  * @wc_cnt: A minimum number of unreaped completions to check for.
2610  *
2611  * If the number of unreaped completions is greater than or equal to wc_cnt,
2612  * this function returns wc_cnt, otherwise, it returns the actual number of
2613  * unreaped completions.
2614  */
2615 int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
2616 
2617 /**
2618  * ib_req_notify_cq - Request completion notification on a CQ.
2619  * @cq: The CQ to generate an event for.
2620  * @flags:
2621  *   Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
2622  *   to request an event on the next solicited event or next work
2623  *   completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
2624  *   may also be |ed in to request a hint about missed events, as
2625  *   described below.
2626  *
2627  * Return Value:
2628  *    < 0 means an error occurred while requesting notification
2629  *   == 0 means notification was requested successfully, and if
2630  *        IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
2631  *        were missed and it is safe to wait for another event.  In
2632  *        this case is it guaranteed that any work completions added
2633  *        to the CQ since the last CQ poll will trigger a completion
2634  *        notification event.
2635  *    > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
2636  *        in.  It means that the consumer must poll the CQ again to
2637  *        make sure it is empty to avoid missing an event because of a
2638  *        race between requesting notification and an entry being
2639  *        added to the CQ.  This return value means it is possible
2640  *        (but not guaranteed) that a work completion has been added
2641  *        to the CQ since the last poll without triggering a
2642  *        completion notification event.
2643  */
2644 static inline int ib_req_notify_cq(struct ib_cq *cq,
2645                                    enum ib_cq_notify_flags flags)
2646 {
2647         return cq->device->req_notify_cq(cq, flags);
2648 }
2649 
2650 /**
2651  * ib_req_ncomp_notif - Request completion notification when there are
2652  *   at least the specified number of unreaped completions on the CQ.
2653  * @cq: The CQ to generate an event for.
2654  * @wc_cnt: The number of unreaped completions that should be on the
2655  *   CQ before an event is generated.
2656  */
2657 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
2658 {
2659         return cq->device->req_ncomp_notif ?
2660                 cq->device->req_ncomp_notif(cq, wc_cnt) :
2661                 -ENOSYS;
2662 }
2663 
2664 /**
2665  * ib_get_dma_mr - Returns a memory region for system memory that is
2666  *   usable for DMA.
2667  * @pd: The protection domain associated with the memory region.
2668  * @mr_access_flags: Specifies the memory access rights.
2669  *
2670  * Note that the ib_dma_*() functions defined below must be used
2671  * to create/destroy addresses used with the Lkey or Rkey returned
2672  * by ib_get_dma_mr().
2673  */
2674 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
2675 
2676 /**
2677  * ib_dma_mapping_error - check a DMA addr for error
2678  * @dev: The device for which the dma_addr was created
2679  * @dma_addr: The DMA address to check
2680  */
2681 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2682 {
2683         if (dev->dma_ops)
2684                 return dev->dma_ops->mapping_error(dev, dma_addr);
2685         return dma_mapping_error(dev->dma_device, dma_addr);
2686 }
2687 
2688 /**
2689  * ib_dma_map_single - Map a kernel virtual address to DMA address
2690  * @dev: The device for which the dma_addr is to be created
2691  * @cpu_addr: The kernel virtual address
2692  * @size: The size of the region in bytes
2693  * @direction: The direction of the DMA
2694  */
2695 static inline u64 ib_dma_map_single(struct ib_device *dev,
2696                                     void *cpu_addr, size_t size,
2697                                     enum dma_data_direction direction)
2698 {
2699         if (dev->dma_ops)
2700                 return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
2701         return dma_map_single(dev->dma_device, cpu_addr, size, direction);
2702 }
2703 
2704 /**
2705  * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
2706  * @dev: The device for which the DMA address was created
2707  * @addr: The DMA address
2708  * @size: The size of the region in bytes
2709  * @direction: The direction of the DMA
2710  */
2711 static inline void ib_dma_unmap_single(struct ib_device *dev,
2712                                        u64 addr, size_t size,
2713                                        enum dma_data_direction direction)
2714 {
2715         if (dev->dma_ops)
2716                 dev->dma_ops->unmap_single(dev, addr, size, direction);
2717         else
2718                 dma_unmap_single(dev->dma_device, addr, size, direction);
2719 }
2720 
2721 static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
2722                                           void *cpu_addr, size_t size,
2723                                           enum dma_data_direction direction,
2724                                           struct dma_attrs *attrs)
2725 {
2726         return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
2727                                     direction, attrs);
2728 }
2729 
2730 static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
2731                                              u64 addr, size_t size,
2732                                              enum dma_data_direction direction,
2733                                              struct dma_attrs *attrs)
2734 {
2735         return dma_unmap_single_attrs(dev->dma_device, addr, size,
2736                                       direction, attrs);
2737 }
2738 
2739 /**
2740  * ib_dma_map_page - Map a physical page to DMA address
2741  * @dev: The device for which the dma_addr is to be created
2742  * @page: The page to be mapped
2743  * @offset: The offset within the page
2744  * @size: The size of the region in bytes
2745  * @direction: The direction of the DMA
2746  */
2747 static inline u64 ib_dma_map_page(struct ib_device *dev,
2748                                   struct page *page,
2749                                   unsigned long offset,
2750                                   size_t size,
2751                                          enum dma_data_direction direction)
2752 {
2753         if (dev->dma_ops)
2754                 return dev->dma_ops->map_page(dev, page, offset, size, direction);
2755         return dma_map_page(dev->dma_device, page, offset, size, direction);
2756 }
2757 
2758 /**
2759  * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
2760  * @dev: The device for which the DMA address was created
2761  * @addr: The DMA address
2762  * @size: The size of the region in bytes
2763  * @direction: The direction of the DMA
2764  */
2765 static inline void ib_dma_unmap_page(struct ib_device *dev,
2766                                      u64 addr, size_t size,
2767                                      enum dma_data_direction direction)
2768 {
2769         if (dev->dma_ops)
2770                 dev->dma_ops->unmap_page(dev, addr, size, direction);
2771         else
2772                 dma_unmap_page(dev->dma_device, addr, size, direction);
2773 }
2774 
2775 /**
2776  * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
2777  * @dev: The device for which the DMA addresses are to be created
2778  * @sg: The array of scatter/gather entries
2779  * @nents: The number of scatter/gather entries
2780  * @direction: The direction of the DMA
2781  */
2782 static inline int ib_dma_map_sg(struct ib_device *dev,
2783                                 struct scatterlist *sg, int nents,
2784                                 enum dma_data_direction direction)
2785 {
2786         if (dev->dma_ops)
2787                 return dev->dma_ops->map_sg(dev, sg, nents, direction);
2788         return dma_map_sg(dev->dma_device, sg, nents, direction);
2789 }
2790 
2791 /**
2792  * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
2793  * @dev: The device for which the DMA addresses were created
2794  * @sg: The array of scatter/gather entries
2795  * @nents: The number of scatter/gather entries
2796  * @direction: The direction of the DMA
2797  */
2798 static inline void ib_dma_unmap_sg(struct ib_device *dev,
2799                                    struct scatterlist *sg, int nents,
2800                                    enum dma_data_direction direction)
2801 {
2802         if (dev->dma_ops)
2803                 dev->dma_ops->unmap_sg(dev, sg, nents, direction);
2804         else
2805                 dma_unmap_sg(dev->dma_device, sg, nents, direction);
2806 }
2807 
2808 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
2809                                       struct scatterlist *sg, int nents,
2810                                       enum dma_data_direction direction,
2811                                       struct dma_attrs *attrs)
2812 {
2813         return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2814 }
2815 
2816 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
2817                                          struct scatterlist *sg, int nents,
2818                                          enum dma_data_direction direction,
2819                                          struct dma_attrs *attrs)
2820 {
2821         dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2822 }
2823 /**
2824  * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
2825  * @dev: The device for which the DMA addresses were created
2826  * @sg: The scatter/gather entry
2827  *
2828  * Note: this function is obsolete. To do: change all occurrences of
2829  * ib_sg_dma_address() into sg_dma_address().
2830  */
2831 static inline u64 ib_sg_dma_address(struct ib_device *dev,
2832                                     struct scatterlist *sg)
2833 {
2834         return sg_dma_address(sg);
2835 }
2836 
2837 /**
2838  * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
2839  * @dev: The device for which the DMA addresses were created
2840  * @sg: The scatter/gather entry
2841  *
2842  * Note: this function is obsolete. To do: change all occurrences of
2843  * ib_sg_dma_len() into sg_dma_len().
2844  */
2845 static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
2846                                          struct scatterlist *sg)
2847 {
2848         return sg_dma_len(sg);
2849 }
2850 
2851 /**
2852  * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
2853  * @dev: The device for which the DMA address was created
2854  * @addr: The DMA address
2855  * @size: The size of the region in bytes
2856  * @dir: The direction of the DMA
2857  */
2858 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
2859                                               u64 addr,
2860                                               size_t size,
2861                                               enum dma_data_direction dir)
2862 {
2863         if (dev->dma_ops)
2864                 dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
2865         else
2866                 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2867 }
2868 
2869 /**
2870  * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
2871  * @dev: The device for which the DMA address was created
2872  * @addr: The DMA address
2873  * @size: The size of the region in bytes
2874  * @dir: The direction of the DMA
2875  */
2876 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
2877                                                  u64 addr,
2878                                                  size_t size,
2879                                                  enum dma_data_direction dir)
2880 {
2881         if (dev->dma_ops)
2882                 dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
2883         else
2884                 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2885 }
2886 
2887 /**
2888  * ib_dma_alloc_coherent - Allocate memory and map it for DMA
2889  * @dev: The device for which the DMA address is requested
2890  * @size: The size of the region to allocate in bytes
2891  * @dma_handle: A pointer for returning the DMA address of the region
2892  * @flag: memory allocator flags
2893  */
2894 static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
2895                                            size_t size,
2896                                            u64 *dma_handle,
2897                                            gfp_t flag)
2898 {
2899         if (dev->dma_ops)
2900                 return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
2901         else {
2902                 dma_addr_t handle;
2903                 void *ret;
2904 
2905                 ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
2906                 *dma_handle = handle;
2907                 return ret;
2908         }
2909 }
2910 
2911 /**
2912  * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
2913  * @dev: The device for which the DMA addresses were allocated
2914  * @size: The size of the region
2915  * @cpu_addr: the address returned by ib_dma_alloc_coherent()
2916  * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
2917  */
2918 static inline void ib_dma_free_coherent(struct ib_device *dev,
2919                                         size_t size, void *cpu_addr,
2920                                         u64 dma_handle)
2921 {
2922         if (dev->dma_ops)
2923                 dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
2924         else
2925                 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
2926 }
2927 
2928 /**
2929  * ib_dereg_mr - Deregisters a memory region and removes it from the
2930  *   HCA translation table.
2931  * @mr: The memory region to deregister.
2932  *
2933  * This function can fail, if the memory region has memory windows bound to it.
2934  */
2935 int ib_dereg_mr(struct ib_mr *mr);
2936 
2937 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
2938                           enum ib_mr_type mr_type,
2939                           u32 max_num_sg);
2940 
2941 /**
2942  * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
2943  *   R_Key and L_Key.
2944  * @mr - struct ib_mr pointer to be updated.
2945  * @newkey - new key to be used.
2946  */
2947 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
2948 {
2949         mr->lkey = (mr->lkey & 0xffffff00) | newkey;
2950         mr->rkey = (mr->rkey & 0xffffff00) | newkey;
2951 }
2952 
2953 /**
2954  * ib_inc_rkey - increments the key portion of the given rkey. Can be used
2955  * for calculating a new rkey for type 2 memory windows.
2956  * @rkey - the rkey to increment.
2957  */
2958 static inline u32 ib_inc_rkey(u32 rkey)
2959 {
2960         const u32 mask = 0x000000ff;
2961         return ((rkey + 1) & mask) | (rkey & ~mask);
2962 }
2963 
2964 /**
2965  * ib_alloc_fmr - Allocates a unmapped fast memory region.
2966  * @pd: The protection domain associated with the unmapped region.
2967  * @mr_access_flags: Specifies the memory access rights.
2968  * @fmr_attr: Attributes of the unmapped region.
2969  *
2970  * A fast memory region must be mapped before it can be used as part of
2971  * a work request.
2972  */
2973 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
2974                             int mr_access_flags,
2975                             struct ib_fmr_attr *fmr_attr);
2976 
2977 /**
2978  * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
2979  * @fmr: The fast memory region to associate with the pages.
2980  * @page_list: An array of physical pages to map to the fast memory region.
2981  * @list_len: The number of pages in page_list.
2982  * @iova: The I/O virtual address to use with the mapped region.
2983  */
2984 static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
2985                                   u64 *page_list, int list_len,
2986                                   u64 iova)
2987 {
2988         return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
2989 }
2990 
2991 /**
2992  * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
2993  * @fmr_list: A linked list of fast memory regions to unmap.
2994  */
2995 int ib_unmap_fmr(struct list_head *fmr_list);
2996 
2997 /**
2998  * ib_dealloc_fmr - Deallocates a fast memory region.
2999  * @fmr: The fast memory region to deallocate.
3000  */
3001 int ib_dealloc_fmr(struct ib_fmr *fmr);
3002 
3003 /**
3004  * ib_attach_mcast - Attaches the specified QP to a multicast group.
3005  * @qp: QP to attach to the multicast group.  The QP must be type
3006  *   IB_QPT_UD.
3007  * @gid: Multicast group GID.
3008  * @lid: Multicast group LID in host byte order.
3009  *
3010  * In order to send and receive multicast packets, subnet
3011  * administration must have created the multicast group and configured
3012  * the fabric appropriately.  The port associated with the specified
3013  * QP must also be a member of the multicast group.
3014  */
3015 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3016 
3017 /**
3018  * ib_detach_mcast - Detaches the specified QP from a multicast group.
3019  * @qp: QP to detach from the multicast group.
3020  * @gid: Multicast group GID.
3021  * @lid: Multicast group LID in host byte order.
3022  */
3023 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3024 
3025 /**
3026  * ib_alloc_xrcd - Allocates an XRC domain.
3027  * @device: The device on which to allocate the XRC domain.
3028  */
3029 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
3030 
3031 /**
3032  * ib_dealloc_xrcd - Deallocates an XRC domain.
3033  * @xrcd: The XRC domain to deallocate.
3034  */
3035 int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
3036 
3037 struct ib_flow *ib_create_flow(struct ib_qp *qp,
3038                                struct ib_flow_attr *flow_attr, int domain);
3039 int ib_destroy_flow(struct ib_flow *flow_id);
3040 
3041 static inline int ib_check_mr_access(int flags)
3042 {
3043         /*
3044          * Local write permission is required if remote write or
3045          * remote atomic permission is also requested.
3046          */
3047         if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
3048             !(flags & IB_ACCESS_LOCAL_WRITE))
3049                 return -EINVAL;
3050 
3051         return 0;
3052 }
3053 
3054 /**
3055  * ib_check_mr_status: lightweight check of MR status.
3056  *     This routine may provide status checks on a selected
3057  *     ib_mr. first use is for signature status check.
3058  *
3059  * @mr: A memory region.
3060  * @check_mask: Bitmask of which checks to perform from
3061  *     ib_mr_status_check enumeration.
3062  * @mr_status: The container of relevant status checks.
3063  *     failed checks will be indicated in the status bitmask
3064  *     and the relevant info shall be in the error item.
3065  */
3066 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
3067                        struct ib_mr_status *mr_status);
3068 
3069 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
3070                                             u16 pkey, const union ib_gid *gid,
3071                                             const struct sockaddr *addr);
3072 
3073 int ib_map_mr_sg(struct ib_mr *mr,
3074                  struct scatterlist *sg,
3075                  int sg_nents,
3076                  unsigned int page_size);
3077 
3078 static inline int
3079 ib_map_mr_sg_zbva(struct ib_mr *mr,
3080                   struct scatterlist *sg,
3081                   int sg_nents,
3082                   unsigned int page_size)
3083 {
3084         int n;
3085 
3086         n = ib_map_mr_sg(mr, sg, sg_nents, page_size);
3087         mr->iova = 0;
3088 
3089         return n;
3090 }
3091 
3092 int ib_sg_to_pages(struct ib_mr *mr,
3093                    struct scatterlist *sgl,
3094                    int sg_nents,
3095                    int (*set_page)(struct ib_mr *, u64));
3096 
3097 #endif /* IB_VERBS_H */
3098 

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