1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. 5 * Copyright (c) 2004 Infinicon Corporation. All rights reserved. 6 * Copyright (c) 2004 Intel Corporation. All rights reserved. 7 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 8 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 9 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 10 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 11 * 12 * This software is available to you under a choice of one of two 13 * licenses. You may choose to be licensed under the terms of the GNU 14 * General Public License (GPL) Version 2, available from the file 15 * COPYING in the main directory of this source tree, or the 16 * OpenIB.org BSD license below: 17 * 18 * Redistribution and use in source and binary forms, with or 19 * without modification, are permitted provided that the following 20 * conditions are met: 21 * 22 * - Redistributions of source code must retain the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer. 25 * 26 * - Redistributions in binary form must reproduce the above 27 * copyright notice, this list of conditions and the following 28 * disclaimer in the documentation and/or other materials 29 * provided with the distribution. 30 * 31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 35 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 36 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 37 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 38 * SOFTWARE. 39 */ 40 41 #if !defined(IB_VERBS_H) 42 #define IB_VERBS_H 43 44 #include <linux/types.h> 45 #include <linux/device.h> 46 #include <linux/mm.h> 47 #include <linux/dma-mapping.h> 48 #include <linux/kref.h> 49 #include <linux/list.h> 50 #include <linux/rwsem.h> 51 #include <linux/scatterlist.h> 52 #include <linux/workqueue.h> 53 #include <linux/socket.h> 54 #include <linux/if_ether.h> 55 #include <net/ipv6.h> 56 #include <net/ip.h> 57 #include <linux/string.h> 58 #include <linux/slab.h> 59 #include <linux/rcupdate.h> 60 #include <linux/netdevice.h> 61 #include <linux/xarray.h> 62 #include <netinet/ip.h> 63 #include <uapi/rdma/ib_user_verbs.h> 64 #include <rdma/signature.h> 65 #include <uapi/rdma/rdma_user_ioctl.h> 66 #include <uapi/rdma/ib_user_ioctl_verbs.h> 67 68 #include <asm/atomic.h> 69 #include <asm/uaccess.h> 70 71 struct ib_uqp_object; 72 struct ib_usrq_object; 73 struct ib_uwq_object; 74 struct ifla_vf_info; 75 struct ifla_vf_stats; 76 struct ib_uverbs_file; 77 struct uverbs_attr_bundle; 78 79 enum ib_uverbs_advise_mr_advice; 80 81 extern struct workqueue_struct *ib_wq; 82 extern struct workqueue_struct *ib_comp_wq; 83 84 struct ib_ucq_object; 85 86 union ib_gid { 87 u8 raw[16]; 88 struct { 89 __be64 subnet_prefix; 90 __be64 interface_id; 91 } global; 92 }; 93 94 extern union ib_gid zgid; 95 96 enum ib_gid_type { 97 /* If link layer is Ethernet, this is RoCE V1 */ 98 IB_GID_TYPE_IB = 0, 99 IB_GID_TYPE_ROCE = 0, 100 IB_GID_TYPE_ROCE_UDP_ENCAP = 1, 101 IB_GID_TYPE_SIZE 102 }; 103 104 #define ROCE_V2_UDP_DPORT 4791 105 struct ib_gid_attr { 106 if_t ndev; 107 struct ib_device *device; 108 union ib_gid gid; 109 enum ib_gid_type gid_type; 110 u16 index; 111 u8 port_num; 112 }; 113 114 enum rdma_node_type { 115 /* IB values map to NodeInfo:NodeType. */ 116 RDMA_NODE_IB_CA = 1, 117 RDMA_NODE_IB_SWITCH, 118 RDMA_NODE_IB_ROUTER, 119 RDMA_NODE_RNIC, 120 RDMA_NODE_USNIC, 121 RDMA_NODE_USNIC_UDP, 122 }; 123 124 enum { 125 /* set the local administered indication */ 126 IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) | 2, 127 }; 128 129 enum rdma_transport_type { 130 RDMA_TRANSPORT_IB, 131 RDMA_TRANSPORT_IWARP, 132 RDMA_TRANSPORT_USNIC, 133 RDMA_TRANSPORT_USNIC_UDP 134 }; 135 136 enum rdma_protocol_type { 137 RDMA_PROTOCOL_IB, 138 RDMA_PROTOCOL_IBOE, 139 RDMA_PROTOCOL_IWARP, 140 RDMA_PROTOCOL_USNIC_UDP 141 }; 142 143 __attribute_const__ enum rdma_transport_type 144 rdma_node_get_transport(enum rdma_node_type node_type); 145 146 enum rdma_network_type { 147 RDMA_NETWORK_IB, 148 RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB, 149 RDMA_NETWORK_IPV4, 150 RDMA_NETWORK_IPV6 151 }; 152 153 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type) 154 { 155 if (network_type == RDMA_NETWORK_IPV4 || 156 network_type == RDMA_NETWORK_IPV6) 157 return IB_GID_TYPE_ROCE_UDP_ENCAP; 158 159 /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */ 160 return IB_GID_TYPE_IB; 161 } 162 163 static inline enum rdma_network_type 164 rdma_gid_attr_network_type(const struct ib_gid_attr *attr) 165 { 166 if (attr->gid_type == IB_GID_TYPE_IB) 167 return RDMA_NETWORK_IB; 168 169 if (ipv6_addr_v4mapped((const struct in6_addr *)&attr->gid)) 170 return RDMA_NETWORK_IPV4; 171 else 172 return RDMA_NETWORK_IPV6; 173 } 174 175 enum rdma_link_layer { 176 IB_LINK_LAYER_UNSPECIFIED, 177 IB_LINK_LAYER_INFINIBAND, 178 IB_LINK_LAYER_ETHERNET, 179 }; 180 181 enum ib_device_cap_flags { 182 IB_DEVICE_RESIZE_MAX_WR = (1 << 0), 183 IB_DEVICE_BAD_PKEY_CNTR = (1 << 1), 184 IB_DEVICE_BAD_QKEY_CNTR = (1 << 2), 185 IB_DEVICE_RAW_MULTI = (1 << 3), 186 IB_DEVICE_AUTO_PATH_MIG = (1 << 4), 187 IB_DEVICE_CHANGE_PHY_PORT = (1 << 5), 188 IB_DEVICE_UD_AV_PORT_ENFORCE = (1 << 6), 189 IB_DEVICE_CURR_QP_STATE_MOD = (1 << 7), 190 IB_DEVICE_SHUTDOWN_PORT = (1 << 8), 191 IB_DEVICE_INIT_TYPE = (1 << 9), 192 IB_DEVICE_PORT_ACTIVE_EVENT = (1 << 10), 193 IB_DEVICE_SYS_IMAGE_GUID = (1 << 11), 194 IB_DEVICE_RC_RNR_NAK_GEN = (1 << 12), 195 IB_DEVICE_SRQ_RESIZE = (1 << 13), 196 IB_DEVICE_N_NOTIFY_CQ = (1 << 14), 197 198 /* 199 * This device supports a per-device lkey or stag that can be 200 * used without performing a memory registration for the local 201 * memory. Note that ULPs should never check this flag, but 202 * instead of use the local_dma_lkey flag in the ib_pd structure, 203 * which will always contain a usable lkey. 204 */ 205 IB_DEVICE_LOCAL_DMA_LKEY = (1 << 15), 206 IB_DEVICE_RESERVED /* old SEND_W_INV */ = (1 << 16), 207 IB_DEVICE_MEM_WINDOW = (1 << 17), 208 /* 209 * Devices should set IB_DEVICE_UD_IP_SUM if they support 210 * insertion of UDP and TCP checksum on outgoing UD IPoIB 211 * messages and can verify the validity of checksum for 212 * incoming messages. Setting this flag implies that the 213 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode. 214 */ 215 IB_DEVICE_UD_IP_CSUM = (1 << 18), 216 IB_DEVICE_UD_TSO = (1 << 19), 217 IB_DEVICE_XRC = (1 << 20), 218 219 /* 220 * This device supports the IB "base memory management extension", 221 * which includes support for fast registrations (IB_WR_REG_MR, 222 * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should 223 * also be set by any iWarp device which must support FRs to comply 224 * to the iWarp verbs spec. iWarp devices also support the 225 * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the 226 * stag. 227 */ 228 IB_DEVICE_MEM_MGT_EXTENSIONS = (1 << 21), 229 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1 << 22), 230 IB_DEVICE_MEM_WINDOW_TYPE_2A = (1 << 23), 231 IB_DEVICE_MEM_WINDOW_TYPE_2B = (1 << 24), 232 IB_DEVICE_RC_IP_CSUM = (1 << 25), 233 /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */ 234 IB_DEVICE_RAW_IP_CSUM = (1 << 26), 235 /* 236 * Devices should set IB_DEVICE_CROSS_CHANNEL if they 237 * support execution of WQEs that involve synchronization 238 * of I/O operations with single completion queue managed 239 * by hardware. 240 */ 241 IB_DEVICE_CROSS_CHANNEL = (1 << 27), 242 IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29), 243 IB_DEVICE_SIGNATURE_HANDOVER = (1 << 30), 244 IB_DEVICE_ON_DEMAND_PAGING = (1ULL << 31), 245 IB_DEVICE_SG_GAPS_REG = (1ULL << 32), 246 IB_DEVICE_VIRTUAL_FUNCTION = (1ULL << 33), 247 /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */ 248 IB_DEVICE_RAW_SCATTER_FCS = (1ULL << 34), 249 IB_DEVICE_KNOWSEPOCH = (1ULL << 35), 250 }; 251 252 enum ib_atomic_cap { 253 IB_ATOMIC_NONE, 254 IB_ATOMIC_HCA, 255 IB_ATOMIC_GLOB 256 }; 257 258 enum ib_odp_general_cap_bits { 259 IB_ODP_SUPPORT = 1 << 0, 260 IB_ODP_SUPPORT_IMPLICIT = 1 << 1, 261 }; 262 263 enum ib_odp_transport_cap_bits { 264 IB_ODP_SUPPORT_SEND = 1 << 0, 265 IB_ODP_SUPPORT_RECV = 1 << 1, 266 IB_ODP_SUPPORT_WRITE = 1 << 2, 267 IB_ODP_SUPPORT_READ = 1 << 3, 268 IB_ODP_SUPPORT_ATOMIC = 1 << 4, 269 }; 270 271 struct ib_odp_caps { 272 uint64_t general_caps; 273 struct { 274 uint32_t rc_odp_caps; 275 uint32_t uc_odp_caps; 276 uint32_t ud_odp_caps; 277 uint32_t xrc_odp_caps; 278 } per_transport_caps; 279 }; 280 281 struct ib_rss_caps { 282 /* Corresponding bit will be set if qp type from 283 * 'enum ib_qp_type' is supported, e.g. 284 * supported_qpts |= 1 << IB_QPT_UD 285 */ 286 u32 supported_qpts; 287 u32 max_rwq_indirection_tables; 288 u32 max_rwq_indirection_table_size; 289 }; 290 291 enum ib_tm_cap_flags { 292 /* Support tag matching with rendezvous offload for RC transport */ 293 IB_TM_CAP_RNDV_RC = 1 << 0, 294 }; 295 296 struct ib_tm_caps { 297 /* Max size of RNDV header */ 298 u32 max_rndv_hdr_size; 299 /* Max number of entries in tag matching list */ 300 u32 max_num_tags; 301 /* From enum ib_tm_cap_flags */ 302 u32 flags; 303 /* Max number of outstanding list operations */ 304 u32 max_ops; 305 /* Max number of SGE in tag matching entry */ 306 u32 max_sge; 307 }; 308 309 enum ib_cq_creation_flags { 310 IB_CQ_FLAGS_TIMESTAMP_COMPLETION = 1 << 0, 311 IB_CQ_FLAGS_IGNORE_OVERRUN = 1 << 1, 312 }; 313 314 struct ib_cq_init_attr { 315 unsigned int cqe; 316 u32 comp_vector; 317 u32 flags; 318 }; 319 320 enum ib_cq_attr_mask { 321 IB_CQ_MODERATE = 1 << 0, 322 }; 323 324 struct ib_cq_caps { 325 u16 max_cq_moderation_count; 326 u16 max_cq_moderation_period; 327 }; 328 329 struct ib_dm_mr_attr { 330 u64 length; 331 u64 offset; 332 u32 access_flags; 333 }; 334 335 struct ib_dm_alloc_attr { 336 u64 length; 337 u32 alignment; 338 u32 flags; 339 }; 340 341 struct ib_device_attr { 342 u64 fw_ver; 343 __be64 sys_image_guid; 344 u64 max_mr_size; 345 u64 page_size_cap; 346 u32 vendor_id; 347 u32 vendor_part_id; 348 u32 hw_ver; 349 int max_qp; 350 int max_qp_wr; 351 u64 device_cap_flags; 352 int max_sge; 353 int max_sge_rd; 354 int max_cq; 355 int max_cqe; 356 int max_mr; 357 int max_pd; 358 int max_qp_rd_atom; 359 int max_ee_rd_atom; 360 int max_res_rd_atom; 361 int max_qp_init_rd_atom; 362 int max_ee_init_rd_atom; 363 enum ib_atomic_cap atomic_cap; 364 enum ib_atomic_cap masked_atomic_cap; 365 int max_ee; 366 int max_rdd; 367 int max_mw; 368 int max_raw_ipv6_qp; 369 int max_raw_ethy_qp; 370 int max_mcast_grp; 371 int max_mcast_qp_attach; 372 int max_total_mcast_qp_attach; 373 int max_ah; 374 int max_fmr; 375 int max_map_per_fmr; 376 int max_srq; 377 int max_srq_wr; 378 union { 379 int max_srq_sge; 380 int max_send_sge; 381 int max_recv_sge; 382 }; 383 unsigned int max_fast_reg_page_list_len; 384 u16 max_pkeys; 385 u8 local_ca_ack_delay; 386 int sig_prot_cap; 387 int sig_guard_cap; 388 struct ib_odp_caps odp_caps; 389 uint64_t timestamp_mask; 390 uint64_t hca_core_clock; /* in KHZ */ 391 struct ib_rss_caps rss_caps; 392 u32 max_wq_type_rq; 393 u32 raw_packet_caps; /* Use ib_raw_packet_caps enum */ 394 struct ib_tm_caps tm_caps; 395 struct ib_cq_caps cq_caps; 396 u64 max_dm_size; 397 /* Max entries for sgl for optimized performance per READ */ 398 u32 max_sgl_rd; 399 }; 400 401 enum ib_mtu { 402 IB_MTU_256 = 1, 403 IB_MTU_512 = 2, 404 IB_MTU_1024 = 3, 405 IB_MTU_2048 = 4, 406 IB_MTU_4096 = 5 407 }; 408 409 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu) 410 { 411 switch (mtu) { 412 case IB_MTU_256: return 256; 413 case IB_MTU_512: return 512; 414 case IB_MTU_1024: return 1024; 415 case IB_MTU_2048: return 2048; 416 case IB_MTU_4096: return 4096; 417 default: return -1; 418 } 419 } 420 421 static inline enum ib_mtu ib_mtu_int_to_enum(int mtu) 422 { 423 if (mtu >= 4096) 424 return IB_MTU_4096; 425 else if (mtu >= 2048) 426 return IB_MTU_2048; 427 else if (mtu >= 1024) 428 return IB_MTU_1024; 429 else if (mtu >= 512) 430 return IB_MTU_512; 431 else 432 return IB_MTU_256; 433 } 434 435 enum ib_port_state { 436 IB_PORT_NOP = 0, 437 IB_PORT_DOWN = 1, 438 IB_PORT_INIT = 2, 439 IB_PORT_ARMED = 3, 440 IB_PORT_ACTIVE = 4, 441 IB_PORT_ACTIVE_DEFER = 5, 442 IB_PORT_DUMMY = -1, /* force enum signed */ 443 }; 444 445 enum ib_port_cap_flags { 446 IB_PORT_SM = 1 << 1, 447 IB_PORT_NOTICE_SUP = 1 << 2, 448 IB_PORT_TRAP_SUP = 1 << 3, 449 IB_PORT_OPT_IPD_SUP = 1 << 4, 450 IB_PORT_AUTO_MIGR_SUP = 1 << 5, 451 IB_PORT_SL_MAP_SUP = 1 << 6, 452 IB_PORT_MKEY_NVRAM = 1 << 7, 453 IB_PORT_PKEY_NVRAM = 1 << 8, 454 IB_PORT_LED_INFO_SUP = 1 << 9, 455 IB_PORT_SM_DISABLED = 1 << 10, 456 IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11, 457 IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12, 458 IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14, 459 IB_PORT_CM_SUP = 1 << 16, 460 IB_PORT_SNMP_TUNNEL_SUP = 1 << 17, 461 IB_PORT_REINIT_SUP = 1 << 18, 462 IB_PORT_DEVICE_MGMT_SUP = 1 << 19, 463 IB_PORT_VENDOR_CLASS_SUP = 1 << 20, 464 IB_PORT_DR_NOTICE_SUP = 1 << 21, 465 IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22, 466 IB_PORT_BOOT_MGMT_SUP = 1 << 23, 467 IB_PORT_LINK_LATENCY_SUP = 1 << 24, 468 IB_PORT_CLIENT_REG_SUP = 1 << 25, 469 IB_PORT_IP_BASED_GIDS = 1 << 26, 470 }; 471 472 enum ib_port_phys_state { 473 IB_PORT_PHYS_STATE_SLEEP = 1, 474 IB_PORT_PHYS_STATE_POLLING = 2, 475 IB_PORT_PHYS_STATE_DISABLED = 3, 476 IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING = 4, 477 IB_PORT_PHYS_STATE_LINK_UP = 5, 478 IB_PORT_PHYS_STATE_LINK_ERROR_RECOVERY = 6, 479 IB_PORT_PHYS_STATE_PHY_TEST = 7, 480 }; 481 482 enum ib_port_width { 483 IB_WIDTH_1X = 1, 484 IB_WIDTH_2X = 16, 485 IB_WIDTH_4X = 2, 486 IB_WIDTH_8X = 4, 487 IB_WIDTH_12X = 8 488 }; 489 490 static inline int ib_width_enum_to_int(enum ib_port_width width) 491 { 492 switch (width) { 493 case IB_WIDTH_1X: return 1; 494 case IB_WIDTH_2X: return 2; 495 case IB_WIDTH_4X: return 4; 496 case IB_WIDTH_8X: return 8; 497 case IB_WIDTH_12X: return 12; 498 default: return -1; 499 } 500 } 501 502 enum ib_port_speed { 503 IB_SPEED_SDR = 1, 504 IB_SPEED_DDR = 2, 505 IB_SPEED_QDR = 4, 506 IB_SPEED_FDR10 = 8, 507 IB_SPEED_FDR = 16, 508 IB_SPEED_EDR = 32, 509 IB_SPEED_HDR = 64, 510 IB_SPEED_NDR = 128, 511 IB_SPEED_XDR = 256, 512 }; 513 514 /** 515 * struct rdma_hw_stats 516 * @lock - Mutex to protect parallel write access to lifespan and values 517 * of counters, which are 64bits and not guaranteeed to be written 518 * atomicaly on 32bits systems. 519 * @timestamp - Used by the core code to track when the last update was 520 * @lifespan - Used by the core code to determine how old the counters 521 * should be before being updated again. Stored in jiffies, defaults 522 * to 10 milliseconds, drivers can override the default be specifying 523 * their own value during their allocation routine. 524 * @name - Array of pointers to static names used for the counters in 525 * directory. 526 * @num_counters - How many hardware counters there are. If name is 527 * shorter than this number, a kernel oops will result. Driver authors 528 * are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters) 529 * in their code to prevent this. 530 * @value - Array of u64 counters that are accessed by the sysfs code and 531 * filled in by the drivers get_stats routine 532 */ 533 struct rdma_hw_stats { 534 struct mutex lock; /* Protect lifespan and values[] */ 535 unsigned long timestamp; 536 unsigned long lifespan; 537 const char * const *names; 538 int num_counters; 539 u64 value[]; 540 }; 541 542 #define RDMA_HW_STATS_DEFAULT_LIFESPAN 10 543 /** 544 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct 545 * for drivers. 546 * @names - Array of static const char * 547 * @num_counters - How many elements in array 548 * @lifespan - How many milliseconds between updates 549 */ 550 static inline struct rdma_hw_stats *rdma_alloc_hw_stats_struct( 551 const char * const *names, int num_counters, 552 unsigned long lifespan) 553 { 554 struct rdma_hw_stats *stats; 555 556 stats = kzalloc(sizeof(*stats) + num_counters * sizeof(u64), 557 GFP_KERNEL); 558 if (!stats) 559 return NULL; 560 stats->names = names; 561 stats->num_counters = num_counters; 562 stats->lifespan = msecs_to_jiffies(lifespan); 563 564 return stats; 565 } 566 567 568 /* Define bits for the various functionality this port needs to be supported by 569 * the core. 570 */ 571 /* Management 0x00000FFF */ 572 #define RDMA_CORE_CAP_IB_MAD 0x00000001 573 #define RDMA_CORE_CAP_IB_SMI 0x00000002 574 #define RDMA_CORE_CAP_IB_CM 0x00000004 575 #define RDMA_CORE_CAP_IW_CM 0x00000008 576 #define RDMA_CORE_CAP_IB_SA 0x00000010 577 #define RDMA_CORE_CAP_OPA_MAD 0x00000020 578 579 /* Address format 0x000FF000 */ 580 #define RDMA_CORE_CAP_AF_IB 0x00001000 581 #define RDMA_CORE_CAP_ETH_AH 0x00002000 582 #define RDMA_CORE_CAP_OPA_AH 0x00004000 583 584 /* Protocol 0xFFF00000 */ 585 #define RDMA_CORE_CAP_PROT_IB 0x00100000 586 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000 587 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000 588 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000 589 590 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \ 591 | RDMA_CORE_CAP_IB_MAD \ 592 | RDMA_CORE_CAP_IB_SMI \ 593 | RDMA_CORE_CAP_IB_CM \ 594 | RDMA_CORE_CAP_IB_SA \ 595 | RDMA_CORE_CAP_AF_IB) 596 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \ 597 | RDMA_CORE_CAP_IB_MAD \ 598 | RDMA_CORE_CAP_IB_CM \ 599 | RDMA_CORE_CAP_AF_IB \ 600 | RDMA_CORE_CAP_ETH_AH) 601 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP \ 602 (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \ 603 | RDMA_CORE_CAP_IB_MAD \ 604 | RDMA_CORE_CAP_IB_CM \ 605 | RDMA_CORE_CAP_AF_IB \ 606 | RDMA_CORE_CAP_ETH_AH) 607 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \ 608 | RDMA_CORE_CAP_IW_CM) 609 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \ 610 | RDMA_CORE_CAP_OPA_MAD) 611 612 struct ib_port_attr { 613 u64 subnet_prefix; 614 enum ib_port_state state; 615 enum ib_mtu max_mtu; 616 enum ib_mtu active_mtu; 617 int gid_tbl_len; 618 unsigned int ip_gids:1; 619 /* This is the value from PortInfo CapabilityMask, defined by IBA */ 620 u32 port_cap_flags; 621 u32 max_msg_sz; 622 u32 bad_pkey_cntr; 623 u32 qkey_viol_cntr; 624 u16 pkey_tbl_len; 625 u32 sm_lid; 626 u32 lid; 627 u8 lmc; 628 u8 max_vl_num; 629 u8 sm_sl; 630 u8 subnet_timeout; 631 u8 init_type_reply; 632 u8 active_width; 633 u16 active_speed; 634 u8 phys_state; 635 bool grh_required; 636 }; 637 638 enum ib_device_modify_flags { 639 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0, 640 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1 641 }; 642 643 #define IB_DEVICE_NODE_DESC_MAX 64 644 645 struct ib_device_modify { 646 u64 sys_image_guid; 647 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 648 }; 649 650 enum ib_port_modify_flags { 651 IB_PORT_SHUTDOWN = 1, 652 IB_PORT_INIT_TYPE = (1<<2), 653 IB_PORT_RESET_QKEY_CNTR = (1<<3) 654 }; 655 656 struct ib_port_modify { 657 u32 set_port_cap_mask; 658 u32 clr_port_cap_mask; 659 u8 init_type; 660 }; 661 662 enum ib_event_type { 663 IB_EVENT_CQ_ERR, 664 IB_EVENT_QP_FATAL, 665 IB_EVENT_QP_REQ_ERR, 666 IB_EVENT_QP_ACCESS_ERR, 667 IB_EVENT_COMM_EST, 668 IB_EVENT_SQ_DRAINED, 669 IB_EVENT_PATH_MIG, 670 IB_EVENT_PATH_MIG_ERR, 671 IB_EVENT_DEVICE_FATAL, 672 IB_EVENT_PORT_ACTIVE, 673 IB_EVENT_PORT_ERR, 674 IB_EVENT_LID_CHANGE, 675 IB_EVENT_PKEY_CHANGE, 676 IB_EVENT_SM_CHANGE, 677 IB_EVENT_SRQ_ERR, 678 IB_EVENT_SRQ_LIMIT_REACHED, 679 IB_EVENT_QP_LAST_WQE_REACHED, 680 IB_EVENT_CLIENT_REREGISTER, 681 IB_EVENT_GID_CHANGE, 682 IB_EVENT_WQ_FATAL, 683 }; 684 685 const char *__attribute_const__ ib_event_msg(enum ib_event_type event); 686 687 struct ib_event { 688 struct ib_device *device; 689 union { 690 struct ib_cq *cq; 691 struct ib_qp *qp; 692 struct ib_srq *srq; 693 struct ib_wq *wq; 694 u8 port_num; 695 } element; 696 enum ib_event_type event; 697 }; 698 699 struct ib_event_handler { 700 struct ib_device *device; 701 void (*handler)(struct ib_event_handler *, struct ib_event *); 702 struct list_head list; 703 }; 704 705 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \ 706 do { \ 707 (_ptr)->device = _device; \ 708 (_ptr)->handler = _handler; \ 709 INIT_LIST_HEAD(&(_ptr)->list); \ 710 } while (0) 711 712 struct ib_global_route { 713 const struct ib_gid_attr *sgid_attr; 714 union ib_gid dgid; 715 u32 flow_label; 716 u8 sgid_index; 717 u8 hop_limit; 718 u8 traffic_class; 719 }; 720 721 struct ib_grh { 722 __be32 version_tclass_flow; 723 __be16 paylen; 724 u8 next_hdr; 725 u8 hop_limit; 726 union ib_gid sgid; 727 union ib_gid dgid; 728 }; 729 730 union rdma_network_hdr { 731 struct ib_grh ibgrh; 732 struct { 733 /* The IB spec states that if it's IPv4, the header 734 * is located in the last 20 bytes of the header. 735 */ 736 u8 reserved[20]; 737 struct ip roce4grh; 738 }; 739 }; 740 741 enum { 742 IB_MULTICAST_QPN = 0xffffff 743 }; 744 745 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF) 746 #define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000) 747 748 enum ib_ah_flags { 749 IB_AH_GRH = 1 750 }; 751 752 enum ib_rate { 753 IB_RATE_PORT_CURRENT = 0, 754 IB_RATE_2_5_GBPS = 2, 755 IB_RATE_5_GBPS = 5, 756 IB_RATE_10_GBPS = 3, 757 IB_RATE_20_GBPS = 6, 758 IB_RATE_30_GBPS = 4, 759 IB_RATE_40_GBPS = 7, 760 IB_RATE_60_GBPS = 8, 761 IB_RATE_80_GBPS = 9, 762 IB_RATE_120_GBPS = 10, 763 IB_RATE_14_GBPS = 11, 764 IB_RATE_56_GBPS = 12, 765 IB_RATE_112_GBPS = 13, 766 IB_RATE_168_GBPS = 14, 767 IB_RATE_25_GBPS = 15, 768 IB_RATE_100_GBPS = 16, 769 IB_RATE_200_GBPS = 17, 770 IB_RATE_300_GBPS = 18, 771 IB_RATE_28_GBPS = 19, 772 IB_RATE_50_GBPS = 20, 773 IB_RATE_400_GBPS = 21, 774 IB_RATE_600_GBPS = 22, 775 }; 776 777 /** 778 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the 779 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be 780 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec. 781 * @rate: rate to convert. 782 */ 783 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate); 784 785 /** 786 * ib_rate_to_mbps - Convert the IB rate enum to Mbps. 787 * For example, IB_RATE_2_5_GBPS will be converted to 2500. 788 * @rate: rate to convert. 789 */ 790 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate); 791 792 793 /** 794 * enum ib_mr_type - memory region type 795 * @IB_MR_TYPE_MEM_REG: memory region that is used for 796 * normal registration 797 * @IB_MR_TYPE_SG_GAPS: memory region that is capable to 798 * register any arbitrary sg lists (without 799 * the normal mr constraints - see 800 * ib_map_mr_sg) 801 * @IB_MR_TYPE_DM: memory region that is used for device 802 * memory registration 803 * @IB_MR_TYPE_USER: memory region that is used for the user-space 804 * application 805 * @IB_MR_TYPE_DMA: memory region that is used for DMA operations 806 * without address translations (VA=PA) 807 * @IB_MR_TYPE_INTEGRITY: memory region that is used for 808 * data integrity operations 809 */ 810 enum ib_mr_type { 811 IB_MR_TYPE_MEM_REG, 812 IB_MR_TYPE_SG_GAPS, 813 IB_MR_TYPE_DM, 814 IB_MR_TYPE_USER, 815 IB_MR_TYPE_DMA, 816 IB_MR_TYPE_INTEGRITY, 817 }; 818 819 enum ib_mr_status_check { 820 IB_MR_CHECK_SIG_STATUS = 1, 821 }; 822 823 /** 824 * struct ib_mr_status - Memory region status container 825 * 826 * @fail_status: Bitmask of MR checks status. For each 827 * failed check a corresponding status bit is set. 828 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS 829 * failure. 830 */ 831 struct ib_mr_status { 832 u32 fail_status; 833 struct ib_sig_err sig_err; 834 }; 835 836 /** 837 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate 838 * enum. 839 * @mult: multiple to convert. 840 */ 841 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult); 842 843 enum rdma_ah_attr_type { 844 RDMA_AH_ATTR_TYPE_UNDEFINED, 845 RDMA_AH_ATTR_TYPE_IB, 846 RDMA_AH_ATTR_TYPE_ROCE, 847 RDMA_AH_ATTR_TYPE_OPA, 848 }; 849 850 struct ib_ah_attr { 851 u16 dlid; 852 u8 src_path_bits; 853 }; 854 855 struct roce_ah_attr { 856 u8 dmac[ETH_ALEN]; 857 }; 858 859 struct opa_ah_attr { 860 u32 dlid; 861 u8 src_path_bits; 862 bool make_grd; 863 }; 864 865 struct rdma_ah_attr { 866 struct ib_global_route grh; 867 u8 sl; 868 u8 static_rate; 869 u8 port_num; 870 u8 ah_flags; 871 enum rdma_ah_attr_type type; 872 union { 873 struct ib_ah_attr ib; 874 struct roce_ah_attr roce; 875 struct opa_ah_attr opa; 876 }; 877 }; 878 879 enum ib_wc_status { 880 IB_WC_SUCCESS, 881 IB_WC_LOC_LEN_ERR, 882 IB_WC_LOC_QP_OP_ERR, 883 IB_WC_LOC_EEC_OP_ERR, 884 IB_WC_LOC_PROT_ERR, 885 IB_WC_WR_FLUSH_ERR, 886 IB_WC_MW_BIND_ERR, 887 IB_WC_BAD_RESP_ERR, 888 IB_WC_LOC_ACCESS_ERR, 889 IB_WC_REM_INV_REQ_ERR, 890 IB_WC_REM_ACCESS_ERR, 891 IB_WC_REM_OP_ERR, 892 IB_WC_RETRY_EXC_ERR, 893 IB_WC_RNR_RETRY_EXC_ERR, 894 IB_WC_LOC_RDD_VIOL_ERR, 895 IB_WC_REM_INV_RD_REQ_ERR, 896 IB_WC_REM_ABORT_ERR, 897 IB_WC_INV_EECN_ERR, 898 IB_WC_INV_EEC_STATE_ERR, 899 IB_WC_FATAL_ERR, 900 IB_WC_RESP_TIMEOUT_ERR, 901 IB_WC_GENERAL_ERR 902 }; 903 904 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status); 905 906 enum ib_wc_opcode { 907 IB_WC_SEND, 908 IB_WC_RDMA_WRITE, 909 IB_WC_RDMA_READ, 910 IB_WC_COMP_SWAP, 911 IB_WC_FETCH_ADD, 912 IB_WC_LSO, 913 IB_WC_LOCAL_INV, 914 IB_WC_REG_MR, 915 IB_WC_MASKED_COMP_SWAP, 916 IB_WC_MASKED_FETCH_ADD, 917 /* 918 * Set value of IB_WC_RECV so consumers can test if a completion is a 919 * receive by testing (opcode & IB_WC_RECV). 920 */ 921 IB_WC_RECV = 1 << 7, 922 IB_WC_RECV_RDMA_WITH_IMM, 923 IB_WC_DUMMY = -1, /* force enum signed */ 924 }; 925 926 enum ib_wc_flags { 927 IB_WC_GRH = 1, 928 IB_WC_WITH_IMM = (1<<1), 929 IB_WC_WITH_INVALIDATE = (1<<2), 930 IB_WC_IP_CSUM_OK = (1<<3), 931 IB_WC_WITH_SMAC = (1<<4), 932 IB_WC_WITH_VLAN = (1<<5), 933 IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6), 934 }; 935 936 struct ib_wc { 937 union { 938 u64 wr_id; 939 struct ib_cqe *wr_cqe; 940 }; 941 enum ib_wc_status status; 942 enum ib_wc_opcode opcode; 943 u32 vendor_err; 944 u32 byte_len; 945 struct ib_qp *qp; 946 union { 947 __be32 imm_data; 948 u32 invalidate_rkey; 949 } ex; 950 u32 src_qp; 951 u32 slid; 952 int wc_flags; 953 u16 pkey_index; 954 u8 sl; 955 u8 dlid_path_bits; 956 u8 port_num; /* valid only for DR SMPs on switches */ 957 u8 smac[ETH_ALEN]; 958 u16 vlan_id; 959 u8 network_hdr_type; 960 }; 961 962 enum ib_cq_notify_flags { 963 IB_CQ_SOLICITED = 1 << 0, 964 IB_CQ_NEXT_COMP = 1 << 1, 965 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP, 966 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2, 967 }; 968 969 enum ib_srq_type { 970 IB_SRQT_BASIC, 971 IB_SRQT_XRC, 972 IB_SRQT_TM, 973 }; 974 975 static inline bool ib_srq_has_cq(enum ib_srq_type srq_type) 976 { 977 return srq_type == IB_SRQT_XRC || 978 srq_type == IB_SRQT_TM; 979 } 980 981 enum ib_srq_attr_mask { 982 IB_SRQ_MAX_WR = 1 << 0, 983 IB_SRQ_LIMIT = 1 << 1, 984 }; 985 986 struct ib_srq_attr { 987 u32 max_wr; 988 u32 max_sge; 989 u32 srq_limit; 990 }; 991 992 struct ib_srq_init_attr { 993 void (*event_handler)(struct ib_event *, void *); 994 void *srq_context; 995 struct ib_srq_attr attr; 996 enum ib_srq_type srq_type; 997 998 struct { 999 struct ib_cq *cq; 1000 union { 1001 struct { 1002 struct ib_xrcd *xrcd; 1003 } xrc; 1004 1005 struct { 1006 u32 max_num_tags; 1007 } tag_matching; 1008 }; 1009 } ext; 1010 }; 1011 1012 struct ib_qp_cap { 1013 u32 max_send_wr; 1014 u32 max_recv_wr; 1015 u32 max_send_sge; 1016 u32 max_recv_sge; 1017 u32 max_inline_data; 1018 1019 /* 1020 * Maximum number of rdma_rw_ctx structures in flight at a time. 1021 * ib_create_qp() will calculate the right amount of neededed WRs 1022 * and MRs based on this. 1023 */ 1024 u32 max_rdma_ctxs; 1025 }; 1026 1027 enum ib_sig_type { 1028 IB_SIGNAL_ALL_WR, 1029 IB_SIGNAL_REQ_WR 1030 }; 1031 1032 enum ib_qp_type { 1033 /* 1034 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries 1035 * here (and in that order) since the MAD layer uses them as 1036 * indices into a 2-entry table. 1037 */ 1038 IB_QPT_SMI, 1039 IB_QPT_GSI, 1040 1041 IB_QPT_RC, 1042 IB_QPT_UC, 1043 IB_QPT_UD, 1044 IB_QPT_RAW_IPV6, 1045 IB_QPT_RAW_ETHERTYPE, 1046 IB_QPT_RAW_PACKET = 8, 1047 IB_QPT_XRC_INI = 9, 1048 IB_QPT_XRC_TGT, 1049 IB_QPT_MAX, 1050 IB_QPT_DRIVER = 0xFF, 1051 /* Reserve a range for qp types internal to the low level driver. 1052 * These qp types will not be visible at the IB core layer, so the 1053 * IB_QPT_MAX usages should not be affected in the core layer 1054 */ 1055 IB_QPT_RESERVED1 = 0x1000, 1056 IB_QPT_RESERVED2, 1057 IB_QPT_RESERVED3, 1058 IB_QPT_RESERVED4, 1059 IB_QPT_RESERVED5, 1060 IB_QPT_RESERVED6, 1061 IB_QPT_RESERVED7, 1062 IB_QPT_RESERVED8, 1063 IB_QPT_RESERVED9, 1064 IB_QPT_RESERVED10, 1065 }; 1066 1067 enum ib_qp_create_flags { 1068 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0, 1069 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1, 1070 IB_QP_CREATE_CROSS_CHANNEL = 1 << 2, 1071 IB_QP_CREATE_MANAGED_SEND = 1 << 3, 1072 IB_QP_CREATE_MANAGED_RECV = 1 << 4, 1073 IB_QP_CREATE_NETIF_QP = 1 << 5, 1074 IB_QP_CREATE_SIGNATURE_EN = 1 << 6, 1075 IB_QP_CREATE_USE_GFP_NOIO = 1 << 7, 1076 IB_QP_CREATE_SCATTER_FCS = 1 << 8, 1077 IB_QP_CREATE_CVLAN_STRIPPING = 1 << 9, 1078 IB_QP_CREATE_SOURCE_QPN = 1 << 10, 1079 IB_QP_CREATE_PCI_WRITE_END_PADDING = 1 << 11, 1080 /* reserve bits 26-31 for low level drivers' internal use */ 1081 IB_QP_CREATE_RESERVED_START = 1 << 26, 1082 IB_QP_CREATE_RESERVED_END = 1 << 31, 1083 }; 1084 1085 /* 1086 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler 1087 * callback to destroy the passed in QP. 1088 */ 1089 1090 struct ib_qp_init_attr { 1091 /* Consumer's event_handler callback must not block */ 1092 void (*event_handler)(struct ib_event *, void *); 1093 1094 void *qp_context; 1095 struct ib_cq *send_cq; 1096 struct ib_cq *recv_cq; 1097 struct ib_srq *srq; 1098 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1099 struct ib_qp_cap cap; 1100 enum ib_sig_type sq_sig_type; 1101 enum ib_qp_type qp_type; 1102 enum ib_qp_create_flags create_flags; 1103 1104 /* 1105 * Only needed for special QP types, or when using the RW API. 1106 */ 1107 u8 port_num; 1108 struct ib_rwq_ind_table *rwq_ind_tbl; 1109 u32 source_qpn; 1110 }; 1111 1112 struct ib_qp_open_attr { 1113 void (*event_handler)(struct ib_event *, void *); 1114 void *qp_context; 1115 u32 qp_num; 1116 enum ib_qp_type qp_type; 1117 }; 1118 1119 enum ib_rnr_timeout { 1120 IB_RNR_TIMER_655_36 = 0, 1121 IB_RNR_TIMER_000_01 = 1, 1122 IB_RNR_TIMER_000_02 = 2, 1123 IB_RNR_TIMER_000_03 = 3, 1124 IB_RNR_TIMER_000_04 = 4, 1125 IB_RNR_TIMER_000_06 = 5, 1126 IB_RNR_TIMER_000_08 = 6, 1127 IB_RNR_TIMER_000_12 = 7, 1128 IB_RNR_TIMER_000_16 = 8, 1129 IB_RNR_TIMER_000_24 = 9, 1130 IB_RNR_TIMER_000_32 = 10, 1131 IB_RNR_TIMER_000_48 = 11, 1132 IB_RNR_TIMER_000_64 = 12, 1133 IB_RNR_TIMER_000_96 = 13, 1134 IB_RNR_TIMER_001_28 = 14, 1135 IB_RNR_TIMER_001_92 = 15, 1136 IB_RNR_TIMER_002_56 = 16, 1137 IB_RNR_TIMER_003_84 = 17, 1138 IB_RNR_TIMER_005_12 = 18, 1139 IB_RNR_TIMER_007_68 = 19, 1140 IB_RNR_TIMER_010_24 = 20, 1141 IB_RNR_TIMER_015_36 = 21, 1142 IB_RNR_TIMER_020_48 = 22, 1143 IB_RNR_TIMER_030_72 = 23, 1144 IB_RNR_TIMER_040_96 = 24, 1145 IB_RNR_TIMER_061_44 = 25, 1146 IB_RNR_TIMER_081_92 = 26, 1147 IB_RNR_TIMER_122_88 = 27, 1148 IB_RNR_TIMER_163_84 = 28, 1149 IB_RNR_TIMER_245_76 = 29, 1150 IB_RNR_TIMER_327_68 = 30, 1151 IB_RNR_TIMER_491_52 = 31 1152 }; 1153 1154 enum ib_qp_attr_mask { 1155 IB_QP_STATE = 1, 1156 IB_QP_CUR_STATE = (1<<1), 1157 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2), 1158 IB_QP_ACCESS_FLAGS = (1<<3), 1159 IB_QP_PKEY_INDEX = (1<<4), 1160 IB_QP_PORT = (1<<5), 1161 IB_QP_QKEY = (1<<6), 1162 IB_QP_AV = (1<<7), 1163 IB_QP_PATH_MTU = (1<<8), 1164 IB_QP_TIMEOUT = (1<<9), 1165 IB_QP_RETRY_CNT = (1<<10), 1166 IB_QP_RNR_RETRY = (1<<11), 1167 IB_QP_RQ_PSN = (1<<12), 1168 IB_QP_MAX_QP_RD_ATOMIC = (1<<13), 1169 IB_QP_ALT_PATH = (1<<14), 1170 IB_QP_MIN_RNR_TIMER = (1<<15), 1171 IB_QP_SQ_PSN = (1<<16), 1172 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17), 1173 IB_QP_PATH_MIG_STATE = (1<<18), 1174 IB_QP_CAP = (1<<19), 1175 IB_QP_DEST_QPN = (1<<20), 1176 IB_QP_RESERVED1 = (1<<21), 1177 IB_QP_RESERVED2 = (1<<22), 1178 IB_QP_RESERVED3 = (1<<23), 1179 IB_QP_RESERVED4 = (1<<24), 1180 IB_QP_RATE_LIMIT = (1<<25), 1181 }; 1182 1183 enum ib_qp_state { 1184 IB_QPS_RESET, 1185 IB_QPS_INIT, 1186 IB_QPS_RTR, 1187 IB_QPS_RTS, 1188 IB_QPS_SQD, 1189 IB_QPS_SQE, 1190 IB_QPS_ERR, 1191 IB_QPS_DUMMY = -1, /* force enum signed */ 1192 }; 1193 1194 enum ib_mig_state { 1195 IB_MIG_MIGRATED, 1196 IB_MIG_REARM, 1197 IB_MIG_ARMED 1198 }; 1199 1200 enum ib_mw_type { 1201 IB_MW_TYPE_1 = 1, 1202 IB_MW_TYPE_2 = 2 1203 }; 1204 1205 struct ib_qp_attr { 1206 enum ib_qp_state qp_state; 1207 enum ib_qp_state cur_qp_state; 1208 enum ib_mtu path_mtu; 1209 enum ib_mig_state path_mig_state; 1210 u32 qkey; 1211 u32 rq_psn; 1212 u32 sq_psn; 1213 u32 dest_qp_num; 1214 int qp_access_flags; 1215 struct ib_qp_cap cap; 1216 struct rdma_ah_attr ah_attr; 1217 struct rdma_ah_attr alt_ah_attr; 1218 u16 pkey_index; 1219 u16 alt_pkey_index; 1220 u8 en_sqd_async_notify; 1221 u8 sq_draining; 1222 u8 max_rd_atomic; 1223 u8 max_dest_rd_atomic; 1224 u8 min_rnr_timer; 1225 u8 port_num; 1226 u8 timeout; 1227 u8 retry_cnt; 1228 u8 rnr_retry; 1229 u8 alt_port_num; 1230 u8 alt_timeout; 1231 u32 rate_limit; 1232 }; 1233 1234 enum ib_wr_opcode { 1235 IB_WR_RDMA_WRITE, 1236 IB_WR_RDMA_WRITE_WITH_IMM, 1237 IB_WR_SEND, 1238 IB_WR_SEND_WITH_IMM, 1239 IB_WR_RDMA_READ, 1240 IB_WR_ATOMIC_CMP_AND_SWP, 1241 IB_WR_ATOMIC_FETCH_AND_ADD, 1242 IB_WR_LSO, 1243 IB_WR_SEND_WITH_INV, 1244 IB_WR_RDMA_READ_WITH_INV, 1245 IB_WR_LOCAL_INV, 1246 IB_WR_REG_MR, 1247 IB_WR_MASKED_ATOMIC_CMP_AND_SWP, 1248 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD, 1249 IB_WR_REG_SIG_MR, 1250 /* reserve values for low level drivers' internal use. 1251 * These values will not be used at all in the ib core layer. 1252 */ 1253 IB_WR_RESERVED1 = 0xf0, 1254 IB_WR_RESERVED2, 1255 IB_WR_RESERVED3, 1256 IB_WR_RESERVED4, 1257 IB_WR_RESERVED5, 1258 IB_WR_RESERVED6, 1259 IB_WR_RESERVED7, 1260 IB_WR_RESERVED8, 1261 IB_WR_RESERVED9, 1262 IB_WR_RESERVED10, 1263 IB_WR_DUMMY = -1, /* force enum signed */ 1264 }; 1265 1266 enum ib_send_flags { 1267 IB_SEND_FENCE = 1, 1268 IB_SEND_SIGNALED = (1<<1), 1269 IB_SEND_SOLICITED = (1<<2), 1270 IB_SEND_INLINE = (1<<3), 1271 IB_SEND_IP_CSUM = (1<<4), 1272 1273 /* reserve bits 26-31 for low level drivers' internal use */ 1274 IB_SEND_RESERVED_START = (1 << 26), 1275 IB_SEND_RESERVED_END = (1 << 31), 1276 }; 1277 1278 struct ib_sge { 1279 u64 addr; 1280 u32 length; 1281 u32 lkey; 1282 }; 1283 1284 struct ib_cqe { 1285 void (*done)(struct ib_cq *cq, struct ib_wc *wc); 1286 }; 1287 1288 struct ib_send_wr { 1289 struct ib_send_wr *next; 1290 union { 1291 u64 wr_id; 1292 struct ib_cqe *wr_cqe; 1293 }; 1294 struct ib_sge *sg_list; 1295 int num_sge; 1296 enum ib_wr_opcode opcode; 1297 int send_flags; 1298 union { 1299 __be32 imm_data; 1300 u32 invalidate_rkey; 1301 } ex; 1302 }; 1303 1304 struct ib_rdma_wr { 1305 struct ib_send_wr wr; 1306 u64 remote_addr; 1307 u32 rkey; 1308 }; 1309 1310 static inline const struct ib_rdma_wr *rdma_wr(const struct ib_send_wr *wr) 1311 { 1312 return container_of(wr, struct ib_rdma_wr, wr); 1313 } 1314 1315 struct ib_atomic_wr { 1316 struct ib_send_wr wr; 1317 u64 remote_addr; 1318 u64 compare_add; 1319 u64 swap; 1320 u64 compare_add_mask; 1321 u64 swap_mask; 1322 u32 rkey; 1323 }; 1324 1325 static inline const struct ib_atomic_wr *atomic_wr(const struct ib_send_wr *wr) 1326 { 1327 return container_of(wr, struct ib_atomic_wr, wr); 1328 } 1329 1330 struct ib_ud_wr { 1331 struct ib_send_wr wr; 1332 struct ib_ah *ah; 1333 void *header; 1334 int hlen; 1335 int mss; 1336 u32 remote_qpn; 1337 u32 remote_qkey; 1338 u16 pkey_index; /* valid for GSI only */ 1339 u8 port_num; /* valid for DR SMPs on switch only */ 1340 }; 1341 1342 static inline const struct ib_ud_wr *ud_wr(const struct ib_send_wr *wr) 1343 { 1344 return container_of(wr, struct ib_ud_wr, wr); 1345 } 1346 1347 struct ib_reg_wr { 1348 struct ib_send_wr wr; 1349 struct ib_mr *mr; 1350 u32 key; 1351 int access; 1352 }; 1353 1354 static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr) 1355 { 1356 return container_of(wr, struct ib_reg_wr, wr); 1357 } 1358 1359 struct ib_sig_handover_wr { 1360 struct ib_send_wr wr; 1361 struct ib_sig_attrs *sig_attrs; 1362 struct ib_mr *sig_mr; 1363 int access_flags; 1364 struct ib_sge *prot; 1365 }; 1366 1367 static inline const struct ib_sig_handover_wr *sig_handover_wr(const struct ib_send_wr *wr) 1368 { 1369 return container_of(wr, struct ib_sig_handover_wr, wr); 1370 } 1371 1372 struct ib_recv_wr { 1373 struct ib_recv_wr *next; 1374 union { 1375 u64 wr_id; 1376 struct ib_cqe *wr_cqe; 1377 }; 1378 struct ib_sge *sg_list; 1379 int num_sge; 1380 }; 1381 1382 enum ib_access_flags { 1383 IB_ACCESS_LOCAL_WRITE = IB_UVERBS_ACCESS_LOCAL_WRITE, 1384 IB_ACCESS_REMOTE_WRITE = IB_UVERBS_ACCESS_REMOTE_WRITE, 1385 IB_ACCESS_REMOTE_READ = IB_UVERBS_ACCESS_REMOTE_READ, 1386 IB_ACCESS_REMOTE_ATOMIC = IB_UVERBS_ACCESS_REMOTE_ATOMIC, 1387 IB_ACCESS_MW_BIND = IB_UVERBS_ACCESS_MW_BIND, 1388 IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED, 1389 IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND, 1390 IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB, 1391 IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING, 1392 1393 IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE, 1394 IB_ACCESS_SUPPORTED = 1395 ((IB_ACCESS_HUGETLB << 1) - 1) | IB_ACCESS_OPTIONAL, 1396 }; 1397 1398 /* 1399 * XXX: these are apparently used for ->rereg_user_mr, no idea why they 1400 * are hidden here instead of a uapi header! 1401 */ 1402 enum ib_mr_rereg_flags { 1403 IB_MR_REREG_TRANS = 1, 1404 IB_MR_REREG_PD = (1<<1), 1405 IB_MR_REREG_ACCESS = (1<<2), 1406 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1) 1407 }; 1408 1409 struct ib_fmr_attr { 1410 int max_pages; 1411 int max_maps; 1412 u8 page_shift; 1413 }; 1414 1415 struct ib_umem; 1416 1417 enum rdma_remove_reason { 1418 /* 1419 * Userspace requested uobject deletion or initial try 1420 * to remove uobject via cleanup. Call could fail 1421 */ 1422 RDMA_REMOVE_DESTROY, 1423 /* Context deletion. This call should delete the actual object itself */ 1424 RDMA_REMOVE_CLOSE, 1425 /* Driver is being hot-unplugged. This call should delete the actual object itself */ 1426 RDMA_REMOVE_DRIVER_REMOVE, 1427 /* uobj is being cleaned-up before being committed */ 1428 RDMA_REMOVE_ABORT, 1429 }; 1430 1431 struct ib_rdmacg_object { 1432 }; 1433 1434 struct ib_ucontext { 1435 struct ib_device *device; 1436 struct ib_uverbs_file *ufile; 1437 /* 1438 * 'closing' can be read by the driver only during a destroy callback, 1439 * it is set when we are closing the file descriptor and indicates 1440 * that mm_sem may be locked. 1441 */ 1442 bool closing; 1443 1444 bool cleanup_retryable; 1445 1446 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING 1447 void (*invalidate_range)(struct ib_umem_odp *umem_odp, 1448 unsigned long start, unsigned long end); 1449 struct mutex per_mm_list_lock; 1450 struct list_head per_mm_list; 1451 #endif 1452 1453 struct ib_rdmacg_object cg_obj; 1454 /* 1455 * Implementation details of the RDMA core, don't use in drivers: 1456 */ 1457 struct xarray mmap_xa; 1458 }; 1459 1460 struct ib_uobject { 1461 u64 user_handle; /* handle given to us by userspace */ 1462 /* ufile & ucontext owning this object */ 1463 struct ib_uverbs_file *ufile; 1464 /* FIXME, save memory: ufile->context == context */ 1465 struct ib_ucontext *context; /* associated user context */ 1466 void *object; /* containing object */ 1467 struct list_head list; /* link to context's list */ 1468 struct ib_rdmacg_object cg_obj; /* rdmacg object */ 1469 int id; /* index into kernel idr */ 1470 struct kref ref; 1471 atomic_t usecnt; /* protects exclusive access */ 1472 struct rcu_head rcu; /* kfree_rcu() overhead */ 1473 1474 const struct uverbs_api_object *uapi_object; 1475 }; 1476 1477 struct ib_udata { 1478 const u8 __user *inbuf; 1479 u8 __user *outbuf; 1480 size_t inlen; 1481 size_t outlen; 1482 }; 1483 1484 struct ib_pd { 1485 u32 local_dma_lkey; 1486 u32 flags; 1487 struct ib_device *device; 1488 struct ib_uobject *uobject; 1489 atomic_t usecnt; /* count all resources */ 1490 1491 u32 unsafe_global_rkey; 1492 1493 /* 1494 * Implementation details of the RDMA core, don't use in drivers: 1495 */ 1496 struct ib_mr *__internal_mr; 1497 }; 1498 1499 struct ib_xrcd { 1500 struct ib_device *device; 1501 atomic_t usecnt; /* count all exposed resources */ 1502 struct inode *inode; 1503 1504 struct mutex tgt_qp_mutex; 1505 struct list_head tgt_qp_list; 1506 }; 1507 1508 struct ib_ah { 1509 struct ib_device *device; 1510 struct ib_pd *pd; 1511 struct ib_uobject *uobject; 1512 const struct ib_gid_attr *sgid_attr; 1513 enum rdma_ah_attr_type type; 1514 }; 1515 1516 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context); 1517 1518 enum ib_poll_context { 1519 IB_POLL_DIRECT, /* caller context, no hw completions */ 1520 IB_POLL_SOFTIRQ, /* poll from softirq context */ 1521 IB_POLL_WORKQUEUE, /* poll from workqueue */ 1522 }; 1523 1524 struct ib_cq { 1525 struct ib_device *device; 1526 struct ib_ucq_object *uobject; 1527 ib_comp_handler comp_handler; 1528 void (*event_handler)(struct ib_event *, void *); 1529 void *cq_context; 1530 int cqe; 1531 atomic_t usecnt; /* count number of work queues */ 1532 struct ib_wc *wc; 1533 enum ib_poll_context poll_ctx; 1534 struct work_struct work; 1535 }; 1536 1537 struct ib_srq { 1538 struct ib_device *device; 1539 struct ib_pd *pd; 1540 struct ib_usrq_object *uobject; 1541 void (*event_handler)(struct ib_event *, void *); 1542 void *srq_context; 1543 enum ib_srq_type srq_type; 1544 atomic_t usecnt; 1545 1546 struct { 1547 struct ib_cq *cq; 1548 union { 1549 struct { 1550 struct ib_xrcd *xrcd; 1551 u32 srq_num; 1552 } xrc; 1553 }; 1554 } ext; 1555 }; 1556 1557 enum ib_raw_packet_caps { 1558 /* Strip cvlan from incoming packet and report it in the matching work 1559 * completion is supported. 1560 */ 1561 IB_RAW_PACKET_CAP_CVLAN_STRIPPING = (1 << 0), 1562 /* Scatter FCS field of an incoming packet to host memory is supported. 1563 */ 1564 IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1), 1565 /* Checksum offloads are supported (for both send and receive). */ 1566 IB_RAW_PACKET_CAP_IP_CSUM = (1 << 2), 1567 }; 1568 1569 enum ib_wq_type { 1570 IB_WQT_RQ 1571 }; 1572 1573 enum ib_wq_state { 1574 IB_WQS_RESET, 1575 IB_WQS_RDY, 1576 IB_WQS_ERR 1577 }; 1578 1579 struct ib_wq { 1580 struct ib_device *device; 1581 struct ib_uwq_object *uobject; 1582 void *wq_context; 1583 void (*event_handler)(struct ib_event *, void *); 1584 struct ib_pd *pd; 1585 struct ib_cq *cq; 1586 u32 wq_num; 1587 enum ib_wq_state state; 1588 enum ib_wq_type wq_type; 1589 atomic_t usecnt; 1590 }; 1591 1592 enum ib_wq_flags { 1593 IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0, 1594 IB_WQ_FLAGS_SCATTER_FCS = 1 << 1, 1595 IB_WQ_FLAGS_DELAY_DROP = 1 << 2, 1596 IB_WQ_FLAGS_PCI_WRITE_END_PADDING = 1 << 3, 1597 }; 1598 1599 struct ib_wq_init_attr { 1600 void *wq_context; 1601 enum ib_wq_type wq_type; 1602 u32 max_wr; 1603 u32 max_sge; 1604 struct ib_cq *cq; 1605 void (*event_handler)(struct ib_event *, void *); 1606 u32 create_flags; /* Use enum ib_wq_flags */ 1607 }; 1608 1609 enum ib_wq_attr_mask { 1610 IB_WQ_STATE = 1 << 0, 1611 IB_WQ_CUR_STATE = 1 << 1, 1612 IB_WQ_FLAGS = 1 << 2, 1613 }; 1614 1615 struct ib_wq_attr { 1616 enum ib_wq_state wq_state; 1617 enum ib_wq_state curr_wq_state; 1618 u32 flags; /* Use enum ib_wq_flags */ 1619 u32 flags_mask; /* Use enum ib_wq_flags */ 1620 }; 1621 1622 struct ib_rwq_ind_table { 1623 struct ib_device *device; 1624 struct ib_uobject *uobject; 1625 atomic_t usecnt; 1626 u32 ind_tbl_num; 1627 u32 log_ind_tbl_size; 1628 struct ib_wq **ind_tbl; 1629 }; 1630 1631 struct ib_rwq_ind_table_init_attr { 1632 u32 log_ind_tbl_size; 1633 /* Each entry is a pointer to Receive Work Queue */ 1634 struct ib_wq **ind_tbl; 1635 }; 1636 1637 /* 1638 * @max_write_sge: Maximum SGE elements per RDMA WRITE request. 1639 * @max_read_sge: Maximum SGE elements per RDMA READ request. 1640 */ 1641 struct ib_qp { 1642 struct ib_device *device; 1643 struct ib_pd *pd; 1644 struct ib_cq *send_cq; 1645 struct ib_cq *recv_cq; 1646 spinlock_t mr_lock; 1647 struct ib_srq *srq; 1648 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1649 struct list_head xrcd_list; 1650 1651 /* count times opened, mcast attaches, flow attaches */ 1652 atomic_t usecnt; 1653 struct list_head open_list; 1654 struct ib_qp *real_qp; 1655 struct ib_uqp_object *uobject; 1656 void (*event_handler)(struct ib_event *, void *); 1657 void *qp_context; 1658 /* sgid_attrs associated with the AV's */ 1659 const struct ib_gid_attr *av_sgid_attr; 1660 const struct ib_gid_attr *alt_path_sgid_attr; 1661 u32 qp_num; 1662 u32 max_write_sge; 1663 u32 max_read_sge; 1664 enum ib_qp_type qp_type; 1665 struct ib_rwq_ind_table *rwq_ind_tbl; 1666 u8 port; 1667 }; 1668 1669 struct ib_dm { 1670 struct ib_device *device; 1671 u32 length; 1672 u32 flags; 1673 struct ib_uobject *uobject; 1674 atomic_t usecnt; 1675 }; 1676 1677 struct ib_mr { 1678 struct ib_device *device; 1679 struct ib_pd *pd; 1680 u32 lkey; 1681 u32 rkey; 1682 u64 iova; 1683 u64 length; 1684 unsigned int page_size; 1685 enum ib_mr_type type; 1686 bool need_inval; 1687 union { 1688 struct ib_uobject *uobject; /* user */ 1689 struct list_head qp_entry; /* FR */ 1690 }; 1691 1692 struct ib_dm *dm; 1693 struct ib_sig_attrs *sig_attrs; /* only for IB_MR_TYPE_INTEGRITY MRs */ 1694 }; 1695 1696 struct ib_mw { 1697 struct ib_device *device; 1698 struct ib_pd *pd; 1699 struct ib_uobject *uobject; 1700 u32 rkey; 1701 enum ib_mw_type type; 1702 }; 1703 1704 struct ib_fmr { 1705 struct ib_device *device; 1706 struct ib_pd *pd; 1707 struct list_head list; 1708 u32 lkey; 1709 u32 rkey; 1710 }; 1711 1712 /* Supported steering options */ 1713 enum ib_flow_attr_type { 1714 /* steering according to rule specifications */ 1715 IB_FLOW_ATTR_NORMAL = 0x0, 1716 /* default unicast and multicast rule - 1717 * receive all Eth traffic which isn't steered to any QP 1718 */ 1719 IB_FLOW_ATTR_ALL_DEFAULT = 0x1, 1720 /* default multicast rule - 1721 * receive all Eth multicast traffic which isn't steered to any QP 1722 */ 1723 IB_FLOW_ATTR_MC_DEFAULT = 0x2, 1724 /* sniffer rule - receive all port traffic */ 1725 IB_FLOW_ATTR_SNIFFER = 0x3 1726 }; 1727 1728 /* Supported steering header types */ 1729 enum ib_flow_spec_type { 1730 /* L2 headers*/ 1731 IB_FLOW_SPEC_ETH = 0x20, 1732 IB_FLOW_SPEC_IB = 0x22, 1733 /* L3 header*/ 1734 IB_FLOW_SPEC_IPV4 = 0x30, 1735 IB_FLOW_SPEC_IPV6 = 0x31, 1736 IB_FLOW_SPEC_ESP = 0x34, 1737 /* L4 headers*/ 1738 IB_FLOW_SPEC_TCP = 0x40, 1739 IB_FLOW_SPEC_UDP = 0x41, 1740 IB_FLOW_SPEC_VXLAN_TUNNEL = 0x50, 1741 IB_FLOW_SPEC_GRE = 0x51, 1742 IB_FLOW_SPEC_MPLS = 0x60, 1743 IB_FLOW_SPEC_INNER = 0x100, 1744 /* Actions */ 1745 IB_FLOW_SPEC_ACTION_TAG = 0x1000, 1746 IB_FLOW_SPEC_ACTION_DROP = 0x1001, 1747 IB_FLOW_SPEC_ACTION_HANDLE = 0x1002, 1748 IB_FLOW_SPEC_ACTION_COUNT = 0x1003, 1749 }; 1750 #define IB_FLOW_SPEC_LAYER_MASK 0xF0 1751 #define IB_FLOW_SPEC_SUPPORT_LAYERS 10 1752 1753 /* Flow steering rule priority is set according to it's domain. 1754 * Lower domain value means higher priority. 1755 */ 1756 enum ib_flow_domain { 1757 IB_FLOW_DOMAIN_USER, 1758 IB_FLOW_DOMAIN_ETHTOOL, 1759 IB_FLOW_DOMAIN_RFS, 1760 IB_FLOW_DOMAIN_NIC, 1761 IB_FLOW_DOMAIN_NUM /* Must be last */ 1762 }; 1763 1764 enum ib_flow_flags { 1765 IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */ 1766 IB_FLOW_ATTR_FLAGS_RESERVED = 1UL << 2 /* Must be last */ 1767 }; 1768 1769 struct ib_flow_eth_filter { 1770 u8 dst_mac[6]; 1771 u8 src_mac[6]; 1772 __be16 ether_type; 1773 __be16 vlan_tag; 1774 /* Must be last */ 1775 u8 real_sz[0]; 1776 }; 1777 1778 struct ib_flow_spec_eth { 1779 enum ib_flow_spec_type type; 1780 u16 size; 1781 struct ib_flow_eth_filter val; 1782 struct ib_flow_eth_filter mask; 1783 }; 1784 1785 struct ib_flow_ib_filter { 1786 __be16 dlid; 1787 __u8 sl; 1788 /* Must be last */ 1789 u8 real_sz[0]; 1790 }; 1791 1792 struct ib_flow_spec_ib { 1793 enum ib_flow_spec_type type; 1794 u16 size; 1795 struct ib_flow_ib_filter val; 1796 struct ib_flow_ib_filter mask; 1797 }; 1798 1799 /* IPv4 header flags */ 1800 enum ib_ipv4_flags { 1801 IB_IPV4_DONT_FRAG = 0x2, /* Don't enable packet fragmentation */ 1802 IB_IPV4_MORE_FRAG = 0X4 /* For All fragmented packets except the 1803 last have this flag set */ 1804 }; 1805 1806 struct ib_flow_ipv4_filter { 1807 __be32 src_ip; 1808 __be32 dst_ip; 1809 u8 proto; 1810 u8 tos; 1811 u8 ttl; 1812 u8 flags; 1813 /* Must be last */ 1814 u8 real_sz[0]; 1815 }; 1816 1817 struct ib_flow_spec_ipv4 { 1818 enum ib_flow_spec_type type; 1819 u16 size; 1820 struct ib_flow_ipv4_filter val; 1821 struct ib_flow_ipv4_filter mask; 1822 }; 1823 1824 struct ib_flow_ipv6_filter { 1825 u8 src_ip[16]; 1826 u8 dst_ip[16]; 1827 __be32 flow_label; 1828 u8 next_hdr; 1829 u8 traffic_class; 1830 u8 hop_limit; 1831 /* Must be last */ 1832 u8 real_sz[0]; 1833 }; 1834 1835 struct ib_flow_spec_ipv6 { 1836 enum ib_flow_spec_type type; 1837 u16 size; 1838 struct ib_flow_ipv6_filter val; 1839 struct ib_flow_ipv6_filter mask; 1840 }; 1841 1842 struct ib_flow_tcp_udp_filter { 1843 __be16 dst_port; 1844 __be16 src_port; 1845 /* Must be last */ 1846 u8 real_sz[0]; 1847 }; 1848 1849 struct ib_flow_spec_tcp_udp { 1850 enum ib_flow_spec_type type; 1851 u16 size; 1852 struct ib_flow_tcp_udp_filter val; 1853 struct ib_flow_tcp_udp_filter mask; 1854 }; 1855 1856 struct ib_flow_tunnel_filter { 1857 __be32 tunnel_id; 1858 u8 real_sz[0]; 1859 }; 1860 1861 /* ib_flow_spec_tunnel describes the Vxlan tunnel 1862 * the tunnel_id from val has the vni value 1863 */ 1864 struct ib_flow_spec_tunnel { 1865 u32 type; 1866 u16 size; 1867 struct ib_flow_tunnel_filter val; 1868 struct ib_flow_tunnel_filter mask; 1869 }; 1870 1871 struct ib_flow_esp_filter { 1872 __be32 spi; 1873 __be32 seq; 1874 /* Must be last */ 1875 u8 real_sz[0]; 1876 }; 1877 1878 struct ib_flow_spec_esp { 1879 u32 type; 1880 u16 size; 1881 struct ib_flow_esp_filter val; 1882 struct ib_flow_esp_filter mask; 1883 }; 1884 1885 struct ib_flow_gre_filter { 1886 __be16 c_ks_res0_ver; 1887 __be16 protocol; 1888 __be32 key; 1889 /* Must be last */ 1890 u8 real_sz[0]; 1891 }; 1892 1893 struct ib_flow_spec_gre { 1894 u32 type; 1895 u16 size; 1896 struct ib_flow_gre_filter val; 1897 struct ib_flow_gre_filter mask; 1898 }; 1899 1900 struct ib_flow_mpls_filter { 1901 __be32 tag; 1902 /* Must be last */ 1903 u8 real_sz[0]; 1904 }; 1905 1906 struct ib_flow_spec_mpls { 1907 u32 type; 1908 u16 size; 1909 struct ib_flow_mpls_filter val; 1910 struct ib_flow_mpls_filter mask; 1911 }; 1912 1913 struct ib_flow_spec_action_tag { 1914 enum ib_flow_spec_type type; 1915 u16 size; 1916 u32 tag_id; 1917 }; 1918 1919 struct ib_flow_spec_action_drop { 1920 enum ib_flow_spec_type type; 1921 u16 size; 1922 }; 1923 1924 struct ib_flow_spec_action_handle { 1925 enum ib_flow_spec_type type; 1926 u16 size; 1927 struct ib_flow_action *act; 1928 }; 1929 1930 enum ib_counters_description { 1931 IB_COUNTER_PACKETS, 1932 IB_COUNTER_BYTES, 1933 }; 1934 1935 struct ib_flow_spec_action_count { 1936 enum ib_flow_spec_type type; 1937 u16 size; 1938 struct ib_counters *counters; 1939 }; 1940 1941 union ib_flow_spec { 1942 struct { 1943 u32 type; 1944 u16 size; 1945 }; 1946 struct ib_flow_spec_eth eth; 1947 struct ib_flow_spec_ib ib; 1948 struct ib_flow_spec_ipv4 ipv4; 1949 struct ib_flow_spec_tcp_udp tcp_udp; 1950 struct ib_flow_spec_ipv6 ipv6; 1951 struct ib_flow_spec_tunnel tunnel; 1952 struct ib_flow_spec_esp esp; 1953 struct ib_flow_spec_gre gre; 1954 struct ib_flow_spec_mpls mpls; 1955 struct ib_flow_spec_action_tag flow_tag; 1956 struct ib_flow_spec_action_drop drop; 1957 struct ib_flow_spec_action_handle action; 1958 struct ib_flow_spec_action_count flow_count; 1959 }; 1960 1961 struct ib_flow_attr { 1962 enum ib_flow_attr_type type; 1963 u16 size; 1964 u16 priority; 1965 u32 flags; 1966 u8 num_of_specs; 1967 u8 port; 1968 union ib_flow_spec flows[0]; 1969 }; 1970 1971 struct ib_flow { 1972 struct ib_qp *qp; 1973 struct ib_device *device; 1974 struct ib_uobject *uobject; 1975 }; 1976 1977 enum ib_flow_action_type { 1978 IB_FLOW_ACTION_UNSPECIFIED, 1979 IB_FLOW_ACTION_ESP = 1, 1980 }; 1981 1982 struct ib_flow_action_attrs_esp_keymats { 1983 enum ib_uverbs_flow_action_esp_keymat protocol; 1984 union { 1985 struct ib_uverbs_flow_action_esp_keymat_aes_gcm aes_gcm; 1986 } keymat; 1987 }; 1988 1989 struct ib_flow_action_attrs_esp_replays { 1990 enum ib_uverbs_flow_action_esp_replay protocol; 1991 union { 1992 struct ib_uverbs_flow_action_esp_replay_bmp bmp; 1993 } replay; 1994 }; 1995 1996 enum ib_flow_action_attrs_esp_flags { 1997 /* All user-space flags at the top: Use enum ib_uverbs_flow_action_esp_flags 1998 * This is done in order to share the same flags between user-space and 1999 * kernel and spare an unnecessary translation. 2000 */ 2001 2002 /* Kernel flags */ 2003 IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED = 1ULL << 32, 2004 IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS = 1ULL << 33, 2005 }; 2006 2007 struct ib_flow_spec_list { 2008 struct ib_flow_spec_list *next; 2009 union ib_flow_spec spec; 2010 }; 2011 2012 struct ib_flow_action_attrs_esp { 2013 struct ib_flow_action_attrs_esp_keymats *keymat; 2014 struct ib_flow_action_attrs_esp_replays *replay; 2015 struct ib_flow_spec_list *encap; 2016 /* Used only if IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED is enabled. 2017 * Value of 0 is a valid value. 2018 */ 2019 u32 esn; 2020 u32 spi; 2021 u32 seq; 2022 u32 tfc_pad; 2023 /* Use enum ib_flow_action_attrs_esp_flags */ 2024 u64 flags; 2025 u64 hard_limit_pkts; 2026 }; 2027 2028 struct ib_flow_action { 2029 struct ib_device *device; 2030 struct ib_uobject *uobject; 2031 enum ib_flow_action_type type; 2032 atomic_t usecnt; 2033 }; 2034 2035 2036 struct ib_mad_hdr; 2037 struct ib_grh; 2038 2039 enum ib_process_mad_flags { 2040 IB_MAD_IGNORE_MKEY = 1, 2041 IB_MAD_IGNORE_BKEY = 2, 2042 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY 2043 }; 2044 2045 enum ib_mad_result { 2046 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */ 2047 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */ 2048 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */ 2049 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */ 2050 }; 2051 2052 #define IB_DEVICE_NAME_MAX 64 2053 2054 struct ib_port_cache { 2055 struct ib_pkey_cache *pkey; 2056 struct ib_gid_table *gid; 2057 u8 lmc; 2058 enum ib_port_state port_state; 2059 }; 2060 2061 struct ib_cache { 2062 rwlock_t lock; 2063 struct ib_event_handler event_handler; 2064 struct ib_port_cache *ports; 2065 }; 2066 2067 struct iw_cm_verbs; 2068 2069 struct ib_port_immutable { 2070 int pkey_tbl_len; 2071 int gid_tbl_len; 2072 u32 core_cap_flags; 2073 u32 max_mad_size; 2074 }; 2075 2076 struct ib_counters { 2077 struct ib_device *device; 2078 struct ib_uobject *uobject; 2079 /* num of objects attached */ 2080 atomic_t usecnt; 2081 }; 2082 2083 struct ib_counters_read_attr { 2084 u64 *counters_buff; 2085 u32 ncounters; 2086 u32 flags; /* use enum ib_read_counters_flags */ 2087 }; 2088 2089 #define INIT_RDMA_OBJ_SIZE(ib_struct, drv_struct, member) \ 2090 .size_##ib_struct = \ 2091 (sizeof(struct drv_struct) + \ 2092 BUILD_BUG_ON_ZERO(offsetof(struct drv_struct, member)) + \ 2093 BUILD_BUG_ON_ZERO( \ 2094 !__same_type(((struct drv_struct *)NULL)->member, \ 2095 struct ib_struct))) 2096 2097 #define rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, gfp) \ 2098 ((struct ib_type *)kzalloc(ib_dev->ops.size_##ib_type, gfp)) 2099 2100 #define rdma_zalloc_drv_obj(ib_dev, ib_type) \ 2101 rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, GFP_KERNEL) 2102 2103 #define DECLARE_RDMA_OBJ_SIZE(ib_struct) size_t size_##ib_struct 2104 2105 struct rdma_user_mmap_entry { 2106 struct kref ref; 2107 struct ib_ucontext *ucontext; 2108 unsigned long start_pgoff; 2109 size_t npages; 2110 bool driver_removed; 2111 }; 2112 2113 /* Return the offset (in bytes) the user should pass to libc's mmap() */ 2114 static inline u64 2115 rdma_user_mmap_get_offset(const struct rdma_user_mmap_entry *entry) 2116 { 2117 return (u64)entry->start_pgoff << PAGE_SHIFT; 2118 } 2119 2120 struct ib_device_ops { 2121 enum rdma_driver_id driver_id; 2122 DECLARE_RDMA_OBJ_SIZE(ib_ah); 2123 DECLARE_RDMA_OBJ_SIZE(ib_cq); 2124 DECLARE_RDMA_OBJ_SIZE(ib_pd); 2125 DECLARE_RDMA_OBJ_SIZE(ib_srq); 2126 DECLARE_RDMA_OBJ_SIZE(ib_ucontext); 2127 }; 2128 2129 #define INIT_IB_DEVICE_OPS(pop, driver, DRIVER) do { \ 2130 (pop)[0] .driver_id = RDMA_DRIVER_##DRIVER; \ 2131 (pop)[0] INIT_RDMA_OBJ_SIZE(ib_ah, driver##_ib_ah, ibah); \ 2132 (pop)[0] INIT_RDMA_OBJ_SIZE(ib_cq, driver##_ib_cq, ibcq); \ 2133 (pop)[0] INIT_RDMA_OBJ_SIZE(ib_pd, driver##_ib_pd, ibpd); \ 2134 (pop)[0] INIT_RDMA_OBJ_SIZE(ib_srq, driver##_ib_srq, ibsrq); \ 2135 (pop)[0] INIT_RDMA_OBJ_SIZE(ib_ucontext, driver##_ib_ucontext, ibucontext); \ 2136 } while (0) 2137 2138 struct ib_device { 2139 struct device *dma_device; 2140 struct ib_device_ops ops; 2141 2142 char name[IB_DEVICE_NAME_MAX]; 2143 2144 struct list_head event_handler_list; 2145 spinlock_t event_handler_lock; 2146 2147 rwlock_t client_data_lock; 2148 struct list_head core_list; 2149 /* Access to the client_data_list is protected by the client_data_lock 2150 * rwlock and the lists_rwsem read-write semaphore 2151 */ 2152 struct list_head client_data_list; 2153 2154 struct ib_cache cache; 2155 /** 2156 * port_immutable is indexed by port number 2157 */ 2158 struct ib_port_immutable *port_immutable; 2159 2160 int num_comp_vectors; 2161 2162 struct iw_cm_verbs *iwcm; 2163 2164 /** 2165 * alloc_hw_stats - Allocate a struct rdma_hw_stats and fill in the 2166 * driver initialized data. The struct is kfree()'ed by the sysfs 2167 * core when the device is removed. A lifespan of -1 in the return 2168 * struct tells the core to set a default lifespan. 2169 */ 2170 struct rdma_hw_stats *(*alloc_hw_stats)(struct ib_device *device, 2171 u8 port_num); 2172 /** 2173 * get_hw_stats - Fill in the counter value(s) in the stats struct. 2174 * @index - The index in the value array we wish to have updated, or 2175 * num_counters if we want all stats updated 2176 * Return codes - 2177 * < 0 - Error, no counters updated 2178 * index - Updated the single counter pointed to by index 2179 * num_counters - Updated all counters (will reset the timestamp 2180 * and prevent further calls for lifespan milliseconds) 2181 * Drivers are allowed to update all counters in leiu of just the 2182 * one given in index at their option 2183 */ 2184 int (*get_hw_stats)(struct ib_device *device, 2185 struct rdma_hw_stats *stats, 2186 u8 port, int index); 2187 int (*query_device)(struct ib_device *device, 2188 struct ib_device_attr *device_attr, 2189 struct ib_udata *udata); 2190 int (*query_port)(struct ib_device *device, 2191 u8 port_num, 2192 struct ib_port_attr *port_attr); 2193 enum rdma_link_layer (*get_link_layer)(struct ib_device *device, 2194 u8 port_num); 2195 /* When calling get_netdev, the HW vendor's driver should return the 2196 * net device of device @device at port @port_num or NULL if such 2197 * a net device doesn't exist. The vendor driver should call dev_hold 2198 * on this net device. The HW vendor's device driver must guarantee 2199 * that this function returns NULL before the net device reaches 2200 * NETDEV_UNREGISTER_FINAL state. 2201 */ 2202 if_t (*get_netdev)(struct ib_device *device, 2203 u8 port_num); 2204 /* query_gid should be return GID value for @device, when @port_num 2205 * link layer is either IB or iWarp. It is no-op if @port_num port 2206 * is RoCE link layer. 2207 */ 2208 int (*query_gid)(struct ib_device *device, 2209 u8 port_num, int index, 2210 union ib_gid *gid); 2211 /* When calling add_gid, the HW vendor's driver should add the gid 2212 * of device of port at gid index available at @attr. Meta-info of 2213 * that gid (for example, the network device related to this gid) is 2214 * available at @attr. @context allows the HW vendor driver to store 2215 * extra information together with a GID entry. The HW vendor driver may 2216 * allocate memory to contain this information and store it in @context 2217 * when a new GID entry is written to. Params are consistent until the 2218 * next call of add_gid or delete_gid. The function should return 0 on 2219 * success or error otherwise. The function could be called 2220 * concurrently for different ports. This function is only called when 2221 * roce_gid_table is used. 2222 */ 2223 int (*add_gid)(const struct ib_gid_attr *attr, 2224 void **context); 2225 /* When calling del_gid, the HW vendor's driver should delete the 2226 * gid of device @device at gid index gid_index of port port_num 2227 * available in @attr. 2228 * Upon the deletion of a GID entry, the HW vendor must free any 2229 * allocated memory. The caller will clear @context afterwards. 2230 * This function is only called when roce_gid_table is used. 2231 */ 2232 int (*del_gid)(const struct ib_gid_attr *attr, 2233 void **context); 2234 int (*query_pkey)(struct ib_device *device, 2235 u8 port_num, u16 index, u16 *pkey); 2236 int (*modify_device)(struct ib_device *device, 2237 int device_modify_mask, 2238 struct ib_device_modify *device_modify); 2239 int (*modify_port)(struct ib_device *device, 2240 u8 port_num, int port_modify_mask, 2241 struct ib_port_modify *port_modify); 2242 int (*alloc_ucontext)(struct ib_ucontext *uctx, 2243 struct ib_udata *udata); 2244 void (*dealloc_ucontext)(struct ib_ucontext *context); 2245 int (*mmap)(struct ib_ucontext *context, 2246 struct vm_area_struct *vma); 2247 int (*alloc_pd)(struct ib_pd *pd, 2248 struct ib_udata *udata); 2249 void (*dealloc_pd)(struct ib_pd *pd, struct ib_udata *udata); 2250 int (*create_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr, 2251 u32 flags, struct ib_udata *udata); 2252 int (*modify_ah)(struct ib_ah *ah, 2253 struct rdma_ah_attr *ah_attr); 2254 int (*query_ah)(struct ib_ah *ah, 2255 struct rdma_ah_attr *ah_attr); 2256 void (*destroy_ah)(struct ib_ah *ah, u32 flags); 2257 int (*create_srq)(struct ib_srq *srq, 2258 struct ib_srq_init_attr *srq_init_attr, 2259 struct ib_udata *udata); 2260 int (*modify_srq)(struct ib_srq *srq, 2261 struct ib_srq_attr *srq_attr, 2262 enum ib_srq_attr_mask srq_attr_mask, 2263 struct ib_udata *udata); 2264 int (*query_srq)(struct ib_srq *srq, 2265 struct ib_srq_attr *srq_attr); 2266 void (*destroy_srq)(struct ib_srq *srq, struct ib_udata *udata); 2267 int (*post_srq_recv)(struct ib_srq *srq, 2268 const struct ib_recv_wr *recv_wr, 2269 const struct ib_recv_wr **bad_recv_wr); 2270 struct ib_qp * (*create_qp)(struct ib_pd *pd, 2271 struct ib_qp_init_attr *qp_init_attr, 2272 struct ib_udata *udata); 2273 int (*modify_qp)(struct ib_qp *qp, 2274 struct ib_qp_attr *qp_attr, 2275 int qp_attr_mask, 2276 struct ib_udata *udata); 2277 int (*query_qp)(struct ib_qp *qp, 2278 struct ib_qp_attr *qp_attr, 2279 int qp_attr_mask, 2280 struct ib_qp_init_attr *qp_init_attr); 2281 int (*destroy_qp)(struct ib_qp *qp, struct ib_udata *udata); 2282 int (*post_send)(struct ib_qp *qp, 2283 const struct ib_send_wr *send_wr, 2284 const struct ib_send_wr **bad_send_wr); 2285 int (*post_recv)(struct ib_qp *qp, 2286 const struct ib_recv_wr *recv_wr, 2287 const struct ib_recv_wr **bad_recv_wr); 2288 int (*create_cq)(struct ib_cq *, 2289 const struct ib_cq_init_attr *attr, 2290 struct ib_udata *udata); 2291 int (*modify_cq)(struct ib_cq *cq, u16 cq_count, 2292 u16 cq_period); 2293 void (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata); 2294 int (*resize_cq)(struct ib_cq *cq, int cqe, 2295 struct ib_udata *udata); 2296 int (*poll_cq)(struct ib_cq *cq, int num_entries, 2297 struct ib_wc *wc); 2298 int (*peek_cq)(struct ib_cq *cq, int wc_cnt); 2299 int (*req_notify_cq)(struct ib_cq *cq, 2300 enum ib_cq_notify_flags flags); 2301 int (*req_ncomp_notif)(struct ib_cq *cq, 2302 int wc_cnt); 2303 struct ib_mr * (*get_dma_mr)(struct ib_pd *pd, 2304 int mr_access_flags); 2305 struct ib_mr * (*reg_user_mr)(struct ib_pd *pd, 2306 u64 start, u64 length, 2307 u64 virt_addr, 2308 int mr_access_flags, 2309 struct ib_udata *udata); 2310 int (*rereg_user_mr)(struct ib_mr *mr, 2311 int flags, 2312 u64 start, u64 length, 2313 u64 virt_addr, 2314 int mr_access_flags, 2315 struct ib_pd *pd, 2316 struct ib_udata *udata); 2317 int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata); 2318 struct ib_mr * (*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type, 2319 u32 max_num_sg, struct ib_udata *udata); 2320 int (*advise_mr)(struct ib_pd *pd, 2321 enum ib_uverbs_advise_mr_advice advice, u32 flags, 2322 const struct ib_sge *sg_list, u32 num_sge, 2323 struct uverbs_attr_bundle *attrs); 2324 int (*map_mr_sg)(struct ib_mr *mr, 2325 struct scatterlist *sg, 2326 int sg_nents, 2327 unsigned int *sg_offset); 2328 struct ib_mw * (*alloc_mw)(struct ib_pd *pd, 2329 enum ib_mw_type type, 2330 struct ib_udata *udata); 2331 int (*dealloc_mw)(struct ib_mw *mw); 2332 struct ib_fmr * (*alloc_fmr)(struct ib_pd *pd, 2333 int mr_access_flags, 2334 struct ib_fmr_attr *fmr_attr); 2335 int (*map_phys_fmr)(struct ib_fmr *fmr, 2336 u64 *page_list, int list_len, 2337 u64 iova); 2338 int (*unmap_fmr)(struct list_head *fmr_list); 2339 int (*dealloc_fmr)(struct ib_fmr *fmr); 2340 int (*attach_mcast)(struct ib_qp *qp, 2341 union ib_gid *gid, 2342 u16 lid); 2343 int (*detach_mcast)(struct ib_qp *qp, 2344 union ib_gid *gid, 2345 u16 lid); 2346 int (*process_mad)(struct ib_device *device, 2347 int process_mad_flags, 2348 u8 port_num, 2349 const struct ib_wc *in_wc, 2350 const struct ib_grh *in_grh, 2351 const struct ib_mad_hdr *in_mad, 2352 size_t in_mad_size, 2353 struct ib_mad_hdr *out_mad, 2354 size_t *out_mad_size, 2355 u16 *out_mad_pkey_index); 2356 struct ib_xrcd * (*alloc_xrcd)(struct ib_device *device, 2357 struct ib_udata *udata); 2358 int (*dealloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata); 2359 struct ib_flow * (*create_flow)(struct ib_qp *qp, 2360 struct ib_flow_attr 2361 *flow_attr, 2362 int domain, struct ib_udata *udata); 2363 int (*destroy_flow)(struct ib_flow *flow_id); 2364 struct ib_flow_action *(*create_flow_action_esp)( 2365 struct ib_device *device, 2366 const struct ib_flow_action_attrs_esp *attr, 2367 struct uverbs_attr_bundle *attrs); 2368 int (*destroy_flow_action)(struct ib_flow_action *action); 2369 int (*modify_flow_action_esp)( 2370 struct ib_flow_action *action, 2371 const struct ib_flow_action_attrs_esp *attr, 2372 struct uverbs_attr_bundle *attrs); 2373 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask, 2374 struct ib_mr_status *mr_status); 2375 /** 2376 * This will be called once refcount of an entry in mmap_xa reaches 2377 * zero. The type of the memory that was mapped may differ between 2378 * entries and is opaque to the rdma_user_mmap interface. 2379 * Therefore needs to be implemented by the driver in mmap_free. 2380 */ 2381 void (*mmap_free)(struct rdma_user_mmap_entry *entry); 2382 void (*disassociate_ucontext)(struct ib_ucontext *ibcontext); 2383 void (*drain_rq)(struct ib_qp *qp); 2384 void (*drain_sq)(struct ib_qp *qp); 2385 int (*set_vf_link_state)(struct ib_device *device, int vf, u8 port, 2386 int state); 2387 int (*get_vf_config)(struct ib_device *device, int vf, u8 port, 2388 struct ifla_vf_info *ivf); 2389 int (*get_vf_stats)(struct ib_device *device, int vf, u8 port, 2390 struct ifla_vf_stats *stats); 2391 int (*set_vf_guid)(struct ib_device *device, int vf, u8 port, u64 guid, 2392 int type); 2393 struct ib_wq * (*create_wq)(struct ib_pd *pd, 2394 struct ib_wq_init_attr *init_attr, 2395 struct ib_udata *udata); 2396 void (*destroy_wq)(struct ib_wq *wq, struct ib_udata *udata); 2397 int (*modify_wq)(struct ib_wq *wq, 2398 struct ib_wq_attr *attr, 2399 u32 wq_attr_mask, 2400 struct ib_udata *udata); 2401 struct ib_rwq_ind_table * (*create_rwq_ind_table)(struct ib_device *device, 2402 struct ib_rwq_ind_table_init_attr *init_attr, 2403 struct ib_udata *udata); 2404 int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table); 2405 struct ib_dm *(*alloc_dm)(struct ib_device *device, 2406 struct ib_ucontext *context, 2407 struct ib_dm_alloc_attr *attr, 2408 struct uverbs_attr_bundle *attrs); 2409 int (*dealloc_dm)(struct ib_dm *dm, struct uverbs_attr_bundle *attrs); 2410 struct ib_mr *(*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm, 2411 struct ib_dm_mr_attr *attr, 2412 struct uverbs_attr_bundle *attrs); 2413 struct ib_counters *(*create_counters)( 2414 struct ib_device *device, struct uverbs_attr_bundle *attrs); 2415 int (*destroy_counters)(struct ib_counters *counters); 2416 int (*read_counters)(struct ib_counters *counters, 2417 struct ib_counters_read_attr *counters_read_attr, 2418 struct uverbs_attr_bundle *attrs); 2419 2420 struct module *owner; 2421 struct device dev; 2422 /* First group for device attributes, NULL terminated array */ 2423 const struct attribute_group *groups[2]; 2424 2425 struct kobject *ports_parent; 2426 struct list_head port_list; 2427 2428 enum { 2429 IB_DEV_UNINITIALIZED, 2430 IB_DEV_REGISTERED, 2431 IB_DEV_UNREGISTERED 2432 } reg_state; 2433 2434 int uverbs_abi_ver; 2435 u64 uverbs_cmd_mask; 2436 u64 uverbs_ex_cmd_mask; 2437 2438 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 2439 __be64 node_guid; 2440 u32 local_dma_lkey; 2441 u16 is_switch:1; 2442 u8 node_type; 2443 u8 phys_port_cnt; 2444 struct ib_device_attr attrs; 2445 struct attribute_group *hw_stats_ag; 2446 struct rdma_hw_stats *hw_stats; 2447 2448 const struct uapi_definition *driver_def; 2449 2450 /** 2451 * The following mandatory functions are used only at device 2452 * registration. Keep functions such as these at the end of this 2453 * structure to avoid cache line misses when accessing struct ib_device 2454 * in fast paths. 2455 */ 2456 int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *); 2457 void (*get_dev_fw_str)(struct ib_device *, char *str, size_t str_len); 2458 }; 2459 2460 struct ib_client { 2461 char *name; 2462 void (*add) (struct ib_device *); 2463 void (*remove)(struct ib_device *, void *client_data); 2464 2465 /* Returns the net_dev belonging to this ib_client and matching the 2466 * given parameters. 2467 * @dev: An RDMA device that the net_dev use for communication. 2468 * @port: A physical port number on the RDMA device. 2469 * @pkey: P_Key that the net_dev uses if applicable. 2470 * @gid: A GID that the net_dev uses to communicate. 2471 * @addr: An IP address the net_dev is configured with. 2472 * @client_data: The device's client data set by ib_set_client_data(). 2473 * 2474 * An ib_client that implements a net_dev on top of RDMA devices 2475 * (such as IP over IB) should implement this callback, allowing the 2476 * rdma_cm module to find the right net_dev for a given request. 2477 * 2478 * The caller is responsible for calling dev_put on the returned 2479 * netdev. */ 2480 if_t (*get_net_dev_by_params)( 2481 struct ib_device *dev, 2482 u8 port, 2483 u16 pkey, 2484 const union ib_gid *gid, 2485 const struct sockaddr *addr, 2486 void *client_data); 2487 struct list_head list; 2488 }; 2489 2490 struct ib_device *ib_alloc_device(size_t size); 2491 void ib_dealloc_device(struct ib_device *device); 2492 2493 void ib_get_device_fw_str(struct ib_device *device, char *str, size_t str_len); 2494 2495 int ib_register_device(struct ib_device *device, 2496 int (*port_callback)(struct ib_device *, 2497 u8, struct kobject *)); 2498 void ib_unregister_device(struct ib_device *device); 2499 2500 int ib_register_client (struct ib_client *client); 2501 void ib_unregister_client(struct ib_client *client); 2502 2503 void *ib_get_client_data(struct ib_device *device, struct ib_client *client); 2504 void ib_set_client_data(struct ib_device *device, struct ib_client *client, 2505 void *data); 2506 2507 int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma, 2508 unsigned long pfn, unsigned long size, pgprot_t prot, 2509 struct rdma_user_mmap_entry *entry); 2510 int rdma_user_mmap_entry_insert(struct ib_ucontext *ucontext, 2511 struct rdma_user_mmap_entry *entry, 2512 size_t length); 2513 int rdma_user_mmap_entry_insert_range(struct ib_ucontext *ucontext, 2514 struct rdma_user_mmap_entry *entry, 2515 size_t length, u32 min_pgoff, 2516 u32 max_pgoff); 2517 2518 struct rdma_user_mmap_entry * 2519 rdma_user_mmap_entry_get_pgoff(struct ib_ucontext *ucontext, 2520 unsigned long pgoff); 2521 struct rdma_user_mmap_entry * 2522 rdma_user_mmap_entry_get(struct ib_ucontext *ucontext, 2523 struct vm_area_struct *vma); 2524 void rdma_user_mmap_entry_put(struct rdma_user_mmap_entry *entry); 2525 2526 void rdma_user_mmap_entry_remove(struct rdma_user_mmap_entry *entry); 2527 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len) 2528 { 2529 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0; 2530 } 2531 2532 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len) 2533 { 2534 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0; 2535 } 2536 2537 static inline bool ib_is_buffer_cleared(const void __user *p, 2538 size_t len) 2539 { 2540 bool ret; 2541 u8 *buf; 2542 2543 if (len > USHRT_MAX) 2544 return false; 2545 2546 buf = memdup_user(p, len); 2547 if (IS_ERR(buf)) 2548 return false; 2549 2550 ret = !memchr_inv(buf, 0, len); 2551 kfree(buf); 2552 return ret; 2553 } 2554 2555 static inline bool ib_is_udata_cleared(struct ib_udata *udata, 2556 size_t offset, 2557 size_t len) 2558 { 2559 return ib_is_buffer_cleared(udata->inbuf + offset, len); 2560 } 2561 2562 /** 2563 * ib_is_destroy_retryable - Check whether the uobject destruction 2564 * is retryable. 2565 * @ret: The initial destruction return code 2566 * @why: remove reason 2567 * @uobj: The uobject that is destroyed 2568 * 2569 * This function is a helper function that IB layer and low-level drivers 2570 * can use to consider whether the destruction of the given uobject is 2571 * retry-able. 2572 * It checks the original return code, if it wasn't success the destruction 2573 * is retryable according to the ucontext state (i.e. cleanup_retryable) and 2574 * the remove reason. (i.e. why). 2575 * Must be called with the object locked for destroy. 2576 */ 2577 static inline bool ib_is_destroy_retryable(int ret, enum rdma_remove_reason why, 2578 struct ib_uobject *uobj) 2579 { 2580 return ret && (why == RDMA_REMOVE_DESTROY || 2581 uobj->context->cleanup_retryable); 2582 } 2583 2584 /** 2585 * ib_destroy_usecnt - Called during destruction to check the usecnt 2586 * @usecnt: The usecnt atomic 2587 * @why: remove reason 2588 * @uobj: The uobject that is destroyed 2589 * 2590 * Non-zero usecnts will block destruction unless destruction was triggered by 2591 * a ucontext cleanup. 2592 */ 2593 static inline int ib_destroy_usecnt(atomic_t *usecnt, 2594 enum rdma_remove_reason why, 2595 struct ib_uobject *uobj) 2596 { 2597 if (atomic_read(usecnt) && ib_is_destroy_retryable(-EBUSY, why, uobj)) 2598 return -EBUSY; 2599 return 0; 2600 } 2601 2602 /** 2603 * ib_modify_qp_is_ok - Check that the supplied attribute mask 2604 * contains all required attributes and no attributes not allowed for 2605 * the given QP state transition. 2606 * @cur_state: Current QP state 2607 * @next_state: Next QP state 2608 * @type: QP type 2609 * @mask: Mask of supplied QP attributes 2610 * 2611 * This function is a helper function that a low-level driver's 2612 * modify_qp method can use to validate the consumer's input. It 2613 * checks that cur_state and next_state are valid QP states, that a 2614 * transition from cur_state to next_state is allowed by the IB spec, 2615 * and that the attribute mask supplied is allowed for the transition. 2616 */ 2617 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 2618 enum ib_qp_type type, enum ib_qp_attr_mask mask); 2619 2620 void ib_register_event_handler(struct ib_event_handler *event_handler); 2621 void ib_unregister_event_handler(struct ib_event_handler *event_handler); 2622 void ib_dispatch_event(struct ib_event *event); 2623 2624 int ib_query_port(struct ib_device *device, 2625 u8 port_num, struct ib_port_attr *port_attr); 2626 2627 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, 2628 u8 port_num); 2629 2630 /** 2631 * rdma_cap_ib_switch - Check if the device is IB switch 2632 * @device: Device to check 2633 * 2634 * Device driver is responsible for setting is_switch bit on 2635 * in ib_device structure at init time. 2636 * 2637 * Return: true if the device is IB switch. 2638 */ 2639 static inline bool rdma_cap_ib_switch(const struct ib_device *device) 2640 { 2641 return device->is_switch; 2642 } 2643 2644 /** 2645 * rdma_start_port - Return the first valid port number for the device 2646 * specified 2647 * 2648 * @device: Device to be checked 2649 * 2650 * Return start port number 2651 */ 2652 static inline u8 rdma_start_port(const struct ib_device *device) 2653 { 2654 return rdma_cap_ib_switch(device) ? 0 : 1; 2655 } 2656 2657 /** 2658 * rdma_end_port - Return the last valid port number for the device 2659 * specified 2660 * 2661 * @device: Device to be checked 2662 * 2663 * Return last port number 2664 */ 2665 static inline u8 rdma_end_port(const struct ib_device *device) 2666 { 2667 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt; 2668 } 2669 2670 static inline int rdma_is_port_valid(const struct ib_device *device, 2671 unsigned int port) 2672 { 2673 return (port >= rdma_start_port(device) && 2674 port <= rdma_end_port(device)); 2675 } 2676 2677 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num) 2678 { 2679 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB; 2680 } 2681 2682 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num) 2683 { 2684 return device->port_immutable[port_num].core_cap_flags & 2685 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP); 2686 } 2687 2688 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device, u8 port_num) 2689 { 2690 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 2691 } 2692 2693 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device, u8 port_num) 2694 { 2695 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE; 2696 } 2697 2698 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num) 2699 { 2700 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP; 2701 } 2702 2703 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num) 2704 { 2705 return rdma_protocol_ib(device, port_num) || 2706 rdma_protocol_roce(device, port_num); 2707 } 2708 2709 /** 2710 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband 2711 * Management Datagrams. 2712 * @device: Device to check 2713 * @port_num: Port number to check 2714 * 2715 * Management Datagrams (MAD) are a required part of the InfiniBand 2716 * specification and are supported on all InfiniBand devices. A slightly 2717 * extended version are also supported on OPA interfaces. 2718 * 2719 * Return: true if the port supports sending/receiving of MAD packets. 2720 */ 2721 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num) 2722 { 2723 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_MAD; 2724 } 2725 2726 /** 2727 * rdma_cap_opa_mad - Check if the port of device provides support for OPA 2728 * Management Datagrams. 2729 * @device: Device to check 2730 * @port_num: Port number to check 2731 * 2732 * Intel OmniPath devices extend and/or replace the InfiniBand Management 2733 * datagrams with their own versions. These OPA MADs share many but not all of 2734 * the characteristics of InfiniBand MADs. 2735 * 2736 * OPA MADs differ in the following ways: 2737 * 2738 * 1) MADs are variable size up to 2K 2739 * IBTA defined MADs remain fixed at 256 bytes 2740 * 2) OPA SMPs must carry valid PKeys 2741 * 3) OPA SMP packets are a different format 2742 * 2743 * Return: true if the port supports OPA MAD packet formats. 2744 */ 2745 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num) 2746 { 2747 return (device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_OPA_MAD) 2748 == RDMA_CORE_CAP_OPA_MAD; 2749 } 2750 2751 /** 2752 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband 2753 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI). 2754 * @device: Device to check 2755 * @port_num: Port number to check 2756 * 2757 * Each InfiniBand node is required to provide a Subnet Management Agent 2758 * that the subnet manager can access. Prior to the fabric being fully 2759 * configured by the subnet manager, the SMA is accessed via a well known 2760 * interface called the Subnet Management Interface (SMI). This interface 2761 * uses directed route packets to communicate with the SM to get around the 2762 * chicken and egg problem of the SM needing to know what's on the fabric 2763 * in order to configure the fabric, and needing to configure the fabric in 2764 * order to send packets to the devices on the fabric. These directed 2765 * route packets do not need the fabric fully configured in order to reach 2766 * their destination. The SMI is the only method allowed to send 2767 * directed route packets on an InfiniBand fabric. 2768 * 2769 * Return: true if the port provides an SMI. 2770 */ 2771 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num) 2772 { 2773 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SMI; 2774 } 2775 2776 /** 2777 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband 2778 * Communication Manager. 2779 * @device: Device to check 2780 * @port_num: Port number to check 2781 * 2782 * The InfiniBand Communication Manager is one of many pre-defined General 2783 * Service Agents (GSA) that are accessed via the General Service 2784 * Interface (GSI). It's role is to facilitate establishment of connections 2785 * between nodes as well as other management related tasks for established 2786 * connections. 2787 * 2788 * Return: true if the port supports an IB CM (this does not guarantee that 2789 * a CM is actually running however). 2790 */ 2791 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num) 2792 { 2793 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_CM; 2794 } 2795 2796 /** 2797 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP 2798 * Communication Manager. 2799 * @device: Device to check 2800 * @port_num: Port number to check 2801 * 2802 * Similar to above, but specific to iWARP connections which have a different 2803 * managment protocol than InfiniBand. 2804 * 2805 * Return: true if the port supports an iWARP CM (this does not guarantee that 2806 * a CM is actually running however). 2807 */ 2808 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num) 2809 { 2810 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IW_CM; 2811 } 2812 2813 /** 2814 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband 2815 * Subnet Administration. 2816 * @device: Device to check 2817 * @port_num: Port number to check 2818 * 2819 * An InfiniBand Subnet Administration (SA) service is a pre-defined General 2820 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand 2821 * fabrics, devices should resolve routes to other hosts by contacting the 2822 * SA to query the proper route. 2823 * 2824 * Return: true if the port should act as a client to the fabric Subnet 2825 * Administration interface. This does not imply that the SA service is 2826 * running locally. 2827 */ 2828 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num) 2829 { 2830 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SA; 2831 } 2832 2833 /** 2834 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband 2835 * Multicast. 2836 * @device: Device to check 2837 * @port_num: Port number to check 2838 * 2839 * InfiniBand multicast registration is more complex than normal IPv4 or 2840 * IPv6 multicast registration. Each Host Channel Adapter must register 2841 * with the Subnet Manager when it wishes to join a multicast group. It 2842 * should do so only once regardless of how many queue pairs it subscribes 2843 * to this group. And it should leave the group only after all queue pairs 2844 * attached to the group have been detached. 2845 * 2846 * Return: true if the port must undertake the additional adminstrative 2847 * overhead of registering/unregistering with the SM and tracking of the 2848 * total number of queue pairs attached to the multicast group. 2849 */ 2850 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num) 2851 { 2852 return rdma_cap_ib_sa(device, port_num); 2853 } 2854 2855 /** 2856 * rdma_cap_af_ib - Check if the port of device has the capability 2857 * Native Infiniband Address. 2858 * @device: Device to check 2859 * @port_num: Port number to check 2860 * 2861 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default 2862 * GID. RoCE uses a different mechanism, but still generates a GID via 2863 * a prescribed mechanism and port specific data. 2864 * 2865 * Return: true if the port uses a GID address to identify devices on the 2866 * network. 2867 */ 2868 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num) 2869 { 2870 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_AF_IB; 2871 } 2872 2873 /** 2874 * rdma_cap_eth_ah - Check if the port of device has the capability 2875 * Ethernet Address Handle. 2876 * @device: Device to check 2877 * @port_num: Port number to check 2878 * 2879 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique 2880 * to fabricate GIDs over Ethernet/IP specific addresses native to the 2881 * port. Normally, packet headers are generated by the sending host 2882 * adapter, but when sending connectionless datagrams, we must manually 2883 * inject the proper headers for the fabric we are communicating over. 2884 * 2885 * Return: true if we are running as a RoCE port and must force the 2886 * addition of a Global Route Header built from our Ethernet Address 2887 * Handle into our header list for connectionless packets. 2888 */ 2889 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num) 2890 { 2891 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH; 2892 } 2893 2894 /** 2895 * rdma_cap_opa_ah - Check if the port of device supports 2896 * OPA Address handles 2897 * @device: Device to check 2898 * @port_num: Port number to check 2899 * 2900 * Return: true if we are running on an OPA device which supports 2901 * the extended OPA addressing. 2902 */ 2903 static inline bool rdma_cap_opa_ah(struct ib_device *device, u8 port_num) 2904 { 2905 return (device->port_immutable[port_num].core_cap_flags & 2906 RDMA_CORE_CAP_OPA_AH) == RDMA_CORE_CAP_OPA_AH; 2907 } 2908 2909 /** 2910 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port. 2911 * 2912 * @device: Device 2913 * @port_num: Port number 2914 * 2915 * This MAD size includes the MAD headers and MAD payload. No other headers 2916 * are included. 2917 * 2918 * Return the max MAD size required by the Port. Will return 0 if the port 2919 * does not support MADs 2920 */ 2921 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num) 2922 { 2923 return device->port_immutable[port_num].max_mad_size; 2924 } 2925 2926 /** 2927 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table 2928 * @device: Device to check 2929 * @port_num: Port number to check 2930 * 2931 * RoCE GID table mechanism manages the various GIDs for a device. 2932 * 2933 * NOTE: if allocating the port's GID table has failed, this call will still 2934 * return true, but any RoCE GID table API will fail. 2935 * 2936 * Return: true if the port uses RoCE GID table mechanism in order to manage 2937 * its GIDs. 2938 */ 2939 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device, 2940 u8 port_num) 2941 { 2942 return rdma_protocol_roce(device, port_num) && 2943 device->add_gid && device->del_gid; 2944 } 2945 2946 /* 2947 * Check if the device supports READ W/ INVALIDATE. 2948 */ 2949 static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num) 2950 { 2951 /* 2952 * iWarp drivers must support READ W/ INVALIDATE. No other protocol 2953 * has support for it yet. 2954 */ 2955 return rdma_protocol_iwarp(dev, port_num); 2956 } 2957 2958 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 2959 int state); 2960 int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 2961 struct ifla_vf_info *info); 2962 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 2963 struct ifla_vf_stats *stats); 2964 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 2965 int type); 2966 2967 int ib_query_pkey(struct ib_device *device, 2968 u8 port_num, u16 index, u16 *pkey); 2969 2970 int ib_modify_device(struct ib_device *device, 2971 int device_modify_mask, 2972 struct ib_device_modify *device_modify); 2973 2974 int ib_modify_port(struct ib_device *device, 2975 u8 port_num, int port_modify_mask, 2976 struct ib_port_modify *port_modify); 2977 2978 int ib_find_gid(struct ib_device *device, union ib_gid *gid, 2979 u8 *port_num, u16 *index); 2980 2981 int ib_find_pkey(struct ib_device *device, 2982 u8 port_num, u16 pkey, u16 *index); 2983 2984 enum ib_pd_flags { 2985 /* 2986 * Create a memory registration for all memory in the system and place 2987 * the rkey for it into pd->unsafe_global_rkey. This can be used by 2988 * ULPs to avoid the overhead of dynamic MRs. 2989 * 2990 * This flag is generally considered unsafe and must only be used in 2991 * extremly trusted environments. Every use of it will log a warning 2992 * in the kernel log. 2993 */ 2994 IB_PD_UNSAFE_GLOBAL_RKEY = 0x01, 2995 }; 2996 2997 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 2998 const char *caller); 2999 #define ib_alloc_pd(device, flags) \ 3000 __ib_alloc_pd((device), (flags), __func__) 3001 3002 /** 3003 * ib_dealloc_pd_user - Deallocate kernel/user PD 3004 * @pd: The protection domain 3005 * @udata: Valid user data or NULL for kernel objects 3006 */ 3007 void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata); 3008 3009 /** 3010 * ib_dealloc_pd - Deallocate kernel PD 3011 * @pd: The protection domain 3012 * 3013 * NOTE: for user PD use ib_dealloc_pd_user with valid udata! 3014 */ 3015 static inline void ib_dealloc_pd(struct ib_pd *pd) 3016 { 3017 ib_dealloc_pd_user(pd, NULL); 3018 } 3019 3020 enum rdma_create_ah_flags { 3021 /* In a sleepable context */ 3022 RDMA_CREATE_AH_SLEEPABLE = BIT(0), 3023 }; 3024 3025 /** 3026 * rdma_create_ah - Creates an address handle for the given address vector. 3027 * @pd: The protection domain associated with the address handle. 3028 * @ah_attr: The attributes of the address vector. 3029 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 3030 * 3031 * The address handle is used to reference a local or global destination 3032 * in all UD QP post sends. 3033 */ 3034 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, 3035 u32 flags); 3036 3037 /** 3038 * rdma_create_user_ah - Creates an address handle for the given address vector. 3039 * It resolves destination mac address for ah attribute of RoCE type. 3040 * @pd: The protection domain associated with the address handle. 3041 * @ah_attr: The attributes of the address vector. 3042 * @udata: pointer to user's input output buffer information need by 3043 * provider driver. 3044 * 3045 * It returns 0 on success and returns appropriate error code on error. 3046 * The address handle is used to reference a local or global destination 3047 * in all UD QP post sends. 3048 */ 3049 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 3050 struct rdma_ah_attr *ah_attr, 3051 struct ib_udata *udata); 3052 3053 /** 3054 * ib_get_gids_from_rdma_hdr - Get sgid and dgid from GRH or IPv4 header 3055 * work completion. 3056 * @hdr: the L3 header to parse 3057 * @net_type: type of header to parse 3058 * @sgid: place to store source gid 3059 * @dgid: place to store destination gid 3060 */ 3061 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 3062 enum rdma_network_type net_type, 3063 union ib_gid *sgid, union ib_gid *dgid); 3064 3065 /** 3066 * ib_get_rdma_header_version - Get the header version 3067 * @hdr: the L3 header to parse 3068 */ 3069 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr); 3070 3071 /** 3072 * ib_init_ah_attr_from_wc - Initializes address handle attributes from a 3073 * work completion. 3074 * @device: Device on which the received message arrived. 3075 * @port_num: Port on which the received message arrived. 3076 * @wc: Work completion associated with the received message. 3077 * @grh: References the received global route header. This parameter is 3078 * ignored unless the work completion indicates that the GRH is valid. 3079 * @ah_attr: Returned attributes that can be used when creating an address 3080 * handle for replying to the message. 3081 * When ib_init_ah_attr_from_wc() returns success, 3082 * (a) for IB link layer it optionally contains a reference to SGID attribute 3083 * when GRH is present for IB link layer. 3084 * (b) for RoCE link layer it contains a reference to SGID attribute. 3085 * User must invoke rdma_cleanup_ah_attr_gid_attr() to release reference to SGID 3086 * attributes which are initialized using ib_init_ah_attr_from_wc(). 3087 * 3088 */ 3089 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num, 3090 const struct ib_wc *wc, const struct ib_grh *grh, 3091 struct rdma_ah_attr *ah_attr); 3092 3093 /** 3094 * ib_create_ah_from_wc - Creates an address handle associated with the 3095 * sender of the specified work completion. 3096 * @pd: The protection domain associated with the address handle. 3097 * @wc: Work completion information associated with a received message. 3098 * @grh: References the received global route header. This parameter is 3099 * ignored unless the work completion indicates that the GRH is valid. 3100 * @port_num: The outbound port number to associate with the address. 3101 * 3102 * The address handle is used to reference a local or global destination 3103 * in all UD QP post sends. 3104 */ 3105 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 3106 const struct ib_grh *grh, u8 port_num); 3107 3108 /** 3109 * rdma_modify_ah - Modifies the address vector associated with an address 3110 * handle. 3111 * @ah: The address handle to modify. 3112 * @ah_attr: The new address vector attributes to associate with the 3113 * address handle. 3114 */ 3115 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3116 3117 /** 3118 * rdma_query_ah - Queries the address vector associated with an address 3119 * handle. 3120 * @ah: The address handle to query. 3121 * @ah_attr: The address vector attributes associated with the address 3122 * handle. 3123 */ 3124 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3125 3126 enum rdma_destroy_ah_flags { 3127 /* In a sleepable context */ 3128 RDMA_DESTROY_AH_SLEEPABLE = BIT(0), 3129 }; 3130 3131 /** 3132 * rdma_destroy_ah_user - Destroys an address handle. 3133 * @ah: The address handle to destroy. 3134 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags). 3135 * @udata: Valid user data or NULL for kernel objects 3136 */ 3137 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata); 3138 3139 /** 3140 * rdma_destroy_ah - Destroys an kernel address handle. 3141 * @ah: The address handle to destroy. 3142 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags). 3143 * 3144 * NOTE: for user ah use ib_destroy_ah_user with valid udata! 3145 */ 3146 static inline int rdma_destroy_ah(struct ib_ah *ah, u32 flags) 3147 { 3148 return rdma_destroy_ah_user(ah, flags, NULL); 3149 } 3150 3151 /** 3152 * ib_create_srq - Creates a SRQ associated with the specified protection 3153 * domain. 3154 * @pd: The protection domain associated with the SRQ. 3155 * @srq_init_attr: A list of initial attributes required to create the 3156 * SRQ. If SRQ creation succeeds, then the attributes are updated to 3157 * the actual capabilities of the created SRQ. 3158 * 3159 * srq_attr->max_wr and srq_attr->max_sge are read the determine the 3160 * requested size of the SRQ, and set to the actual values allocated 3161 * on return. If ib_create_srq() succeeds, then max_wr and max_sge 3162 * will always be at least as large as the requested values. 3163 */ 3164 struct ib_srq *ib_create_srq(struct ib_pd *pd, 3165 struct ib_srq_init_attr *srq_init_attr); 3166 3167 /** 3168 * ib_modify_srq - Modifies the attributes for the specified SRQ. 3169 * @srq: The SRQ to modify. 3170 * @srq_attr: On input, specifies the SRQ attributes to modify. On output, 3171 * the current values of selected SRQ attributes are returned. 3172 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ 3173 * are being modified. 3174 * 3175 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or 3176 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when 3177 * the number of receives queued drops below the limit. 3178 */ 3179 int ib_modify_srq(struct ib_srq *srq, 3180 struct ib_srq_attr *srq_attr, 3181 enum ib_srq_attr_mask srq_attr_mask); 3182 3183 /** 3184 * ib_query_srq - Returns the attribute list and current values for the 3185 * specified SRQ. 3186 * @srq: The SRQ to query. 3187 * @srq_attr: The attributes of the specified SRQ. 3188 */ 3189 int ib_query_srq(struct ib_srq *srq, 3190 struct ib_srq_attr *srq_attr); 3191 3192 /** 3193 * ib_destroy_srq_user - Destroys the specified SRQ. 3194 * @srq: The SRQ to destroy. 3195 * @udata: Valid user data or NULL for kernel objects 3196 */ 3197 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata); 3198 3199 /** 3200 * ib_destroy_srq - Destroys the specified kernel SRQ. 3201 * @srq: The SRQ to destroy. 3202 * 3203 * NOTE: for user srq use ib_destroy_srq_user with valid udata! 3204 */ 3205 static inline int ib_destroy_srq(struct ib_srq *srq) 3206 { 3207 return ib_destroy_srq_user(srq, NULL); 3208 } 3209 3210 /** 3211 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ. 3212 * @srq: The SRQ to post the work request on. 3213 * @recv_wr: A list of work requests to post on the receive queue. 3214 * @bad_recv_wr: On an immediate failure, this parameter will reference 3215 * the work request that failed to be posted on the QP. 3216 */ 3217 static inline int ib_post_srq_recv(struct ib_srq *srq, 3218 const struct ib_recv_wr *recv_wr, 3219 const struct ib_recv_wr **bad_recv_wr) 3220 { 3221 const struct ib_recv_wr *dummy; 3222 3223 return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr ? : &dummy); 3224 } 3225 3226 /** 3227 * ib_create_qp - Creates a QP associated with the specified protection 3228 * domain. 3229 * @pd: The protection domain associated with the QP. 3230 * @qp_init_attr: A list of initial attributes required to create the 3231 * QP. If QP creation succeeds, then the attributes are updated to 3232 * the actual capabilities of the created QP. 3233 */ 3234 struct ib_qp *ib_create_qp(struct ib_pd *pd, 3235 struct ib_qp_init_attr *qp_init_attr); 3236 3237 /** 3238 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 3239 * @qp: The QP to modify. 3240 * @attr: On input, specifies the QP attributes to modify. On output, 3241 * the current values of selected QP attributes are returned. 3242 * @attr_mask: A bit-mask used to specify which attributes of the QP 3243 * are being modified. 3244 * @udata: pointer to user's input output buffer information 3245 * are being modified. 3246 * It returns 0 on success and returns appropriate error code on error. 3247 */ 3248 int ib_modify_qp_with_udata(struct ib_qp *qp, 3249 struct ib_qp_attr *attr, 3250 int attr_mask, 3251 struct ib_udata *udata); 3252 3253 /** 3254 * ib_modify_qp - Modifies the attributes for the specified QP and then 3255 * transitions the QP to the given state. 3256 * @qp: The QP to modify. 3257 * @qp_attr: On input, specifies the QP attributes to modify. On output, 3258 * the current values of selected QP attributes are returned. 3259 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP 3260 * are being modified. 3261 */ 3262 int ib_modify_qp(struct ib_qp *qp, 3263 struct ib_qp_attr *qp_attr, 3264 int qp_attr_mask); 3265 3266 /** 3267 * ib_query_qp - Returns the attribute list and current values for the 3268 * specified QP. 3269 * @qp: The QP to query. 3270 * @qp_attr: The attributes of the specified QP. 3271 * @qp_attr_mask: A bit-mask used to select specific attributes to query. 3272 * @qp_init_attr: Additional attributes of the selected QP. 3273 * 3274 * The qp_attr_mask may be used to limit the query to gathering only the 3275 * selected attributes. 3276 */ 3277 int ib_query_qp(struct ib_qp *qp, 3278 struct ib_qp_attr *qp_attr, 3279 int qp_attr_mask, 3280 struct ib_qp_init_attr *qp_init_attr); 3281 3282 /** 3283 * ib_destroy_qp - Destroys the specified QP. 3284 * @qp: The QP to destroy. 3285 * @udata: Valid udata or NULL for kernel objects 3286 */ 3287 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata); 3288 3289 /** 3290 * ib_destroy_qp - Destroys the specified kernel QP. 3291 * @qp: The QP to destroy. 3292 * 3293 * NOTE: for user qp use ib_destroy_qp_user with valid udata! 3294 */ 3295 static inline int ib_destroy_qp(struct ib_qp *qp) 3296 { 3297 return ib_destroy_qp_user(qp, NULL); 3298 } 3299 3300 /** 3301 * ib_open_qp - Obtain a reference to an existing sharable QP. 3302 * @xrcd - XRC domain 3303 * @qp_open_attr: Attributes identifying the QP to open. 3304 * 3305 * Returns a reference to a sharable QP. 3306 */ 3307 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 3308 struct ib_qp_open_attr *qp_open_attr); 3309 3310 /** 3311 * ib_close_qp - Release an external reference to a QP. 3312 * @qp: The QP handle to release 3313 * 3314 * The opened QP handle is released by the caller. The underlying 3315 * shared QP is not destroyed until all internal references are released. 3316 */ 3317 int ib_close_qp(struct ib_qp *qp); 3318 3319 /** 3320 * ib_post_send - Posts a list of work requests to the send queue of 3321 * the specified QP. 3322 * @qp: The QP to post the work request on. 3323 * @send_wr: A list of work requests to post on the send queue. 3324 * @bad_send_wr: On an immediate failure, this parameter will reference 3325 * the work request that failed to be posted on the QP. 3326 * 3327 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate 3328 * error is returned, the QP state shall not be affected, 3329 * ib_post_send() will return an immediate error after queueing any 3330 * earlier work requests in the list. 3331 */ 3332 static inline int ib_post_send(struct ib_qp *qp, 3333 const struct ib_send_wr *send_wr, 3334 const struct ib_send_wr **bad_send_wr) 3335 { 3336 const struct ib_send_wr *dummy; 3337 3338 return qp->device->post_send(qp, send_wr, bad_send_wr ? : &dummy); 3339 } 3340 3341 /** 3342 * ib_post_recv - Posts a list of work requests to the receive queue of 3343 * the specified QP. 3344 * @qp: The QP to post the work request on. 3345 * @recv_wr: A list of work requests to post on the receive queue. 3346 * @bad_recv_wr: On an immediate failure, this parameter will reference 3347 * the work request that failed to be posted on the QP. 3348 */ 3349 static inline int ib_post_recv(struct ib_qp *qp, 3350 const struct ib_recv_wr *recv_wr, 3351 const struct ib_recv_wr **bad_recv_wr) 3352 { 3353 const struct ib_recv_wr *dummy; 3354 3355 return qp->device->post_recv(qp, recv_wr, bad_recv_wr ? : &dummy); 3356 } 3357 3358 struct ib_cq *__ib_alloc_cq_user(struct ib_device *dev, void *private, 3359 int nr_cqe, int comp_vector, 3360 enum ib_poll_context poll_ctx, 3361 const char *caller, struct ib_udata *udata); 3362 3363 /** 3364 * ib_alloc_cq_user: Allocate kernel/user CQ 3365 * @dev: The IB device 3366 * @private: Private data attached to the CQE 3367 * @nr_cqe: Number of CQEs in the CQ 3368 * @comp_vector: Completion vector used for the IRQs 3369 * @poll_ctx: Context used for polling the CQ 3370 * @udata: Valid user data or NULL for kernel objects 3371 */ 3372 static inline struct ib_cq *ib_alloc_cq_user(struct ib_device *dev, 3373 void *private, int nr_cqe, 3374 int comp_vector, 3375 enum ib_poll_context poll_ctx, 3376 struct ib_udata *udata) 3377 { 3378 return __ib_alloc_cq_user(dev, private, nr_cqe, comp_vector, poll_ctx, 3379 "ibcore", udata); 3380 } 3381 3382 /** 3383 * ib_alloc_cq: Allocate kernel CQ 3384 * @dev: The IB device 3385 * @private: Private data attached to the CQE 3386 * @nr_cqe: Number of CQEs in the CQ 3387 * @comp_vector: Completion vector used for the IRQs 3388 * @poll_ctx: Context used for polling the CQ 3389 * 3390 * NOTE: for user cq use ib_alloc_cq_user with valid udata! 3391 */ 3392 static inline struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private, 3393 int nr_cqe, int comp_vector, 3394 enum ib_poll_context poll_ctx) 3395 { 3396 return ib_alloc_cq_user(dev, private, nr_cqe, comp_vector, poll_ctx, 3397 NULL); 3398 } 3399 3400 /** 3401 * ib_free_cq_user - Free kernel/user CQ 3402 * @cq: The CQ to free 3403 * @udata: Valid user data or NULL for kernel objects 3404 */ 3405 void ib_free_cq_user(struct ib_cq *cq, struct ib_udata *udata); 3406 3407 /** 3408 * ib_free_cq - Free kernel CQ 3409 * @cq: The CQ to free 3410 * 3411 * NOTE: for user cq use ib_free_cq_user with valid udata! 3412 */ 3413 static inline void ib_free_cq(struct ib_cq *cq) 3414 { 3415 ib_free_cq_user(cq, NULL); 3416 } 3417 3418 int ib_process_cq_direct(struct ib_cq *cq, int budget); 3419 3420 /** 3421 * ib_create_cq - Creates a CQ on the specified device. 3422 * @device: The device on which to create the CQ. 3423 * @comp_handler: A user-specified callback that is invoked when a 3424 * completion event occurs on the CQ. 3425 * @event_handler: A user-specified callback that is invoked when an 3426 * asynchronous event not associated with a completion occurs on the CQ. 3427 * @cq_context: Context associated with the CQ returned to the user via 3428 * the associated completion and event handlers. 3429 * @cq_attr: The attributes the CQ should be created upon. 3430 * 3431 * Users can examine the cq structure to determine the actual CQ size. 3432 */ 3433 struct ib_cq *__ib_create_cq(struct ib_device *device, 3434 ib_comp_handler comp_handler, 3435 void (*event_handler)(struct ib_event *, void *), 3436 void *cq_context, 3437 const struct ib_cq_init_attr *cq_attr, 3438 const char *caller); 3439 #define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \ 3440 __ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), "ibcore") 3441 3442 /** 3443 * ib_resize_cq - Modifies the capacity of the CQ. 3444 * @cq: The CQ to resize. 3445 * @cqe: The minimum size of the CQ. 3446 * 3447 * Users can examine the cq structure to determine the actual CQ size. 3448 */ 3449 int ib_resize_cq(struct ib_cq *cq, int cqe); 3450 3451 /** 3452 * rdma_set_cq_moderation - Modifies moderation params of the CQ 3453 * @cq: The CQ to modify. 3454 * @cq_count: number of CQEs that will trigger an event 3455 * @cq_period: max period of time in usec before triggering an event 3456 * 3457 */ 3458 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period); 3459 3460 /** 3461 * ib_destroy_cq_user - Destroys the specified CQ. 3462 * @cq: The CQ to destroy. 3463 * @udata: Valid user data or NULL for kernel objects 3464 */ 3465 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata); 3466 3467 /** 3468 * ib_destroy_cq - Destroys the specified kernel CQ. 3469 * @cq: The CQ to destroy. 3470 * 3471 * NOTE: for user cq use ib_destroy_cq_user with valid udata! 3472 */ 3473 static inline void ib_destroy_cq(struct ib_cq *cq) 3474 { 3475 ib_destroy_cq_user(cq, NULL); 3476 } 3477 3478 /** 3479 * ib_poll_cq - poll a CQ for completion(s) 3480 * @cq:the CQ being polled 3481 * @num_entries:maximum number of completions to return 3482 * @wc:array of at least @num_entries &struct ib_wc where completions 3483 * will be returned 3484 * 3485 * Poll a CQ for (possibly multiple) completions. If the return value 3486 * is < 0, an error occurred. If the return value is >= 0, it is the 3487 * number of completions returned. If the return value is 3488 * non-negative and < num_entries, then the CQ was emptied. 3489 */ 3490 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries, 3491 struct ib_wc *wc) 3492 { 3493 return cq->device->poll_cq(cq, num_entries, wc); 3494 } 3495 3496 /** 3497 * ib_peek_cq - Returns the number of unreaped completions currently 3498 * on the specified CQ. 3499 * @cq: The CQ to peek. 3500 * @wc_cnt: A minimum number of unreaped completions to check for. 3501 * 3502 * If the number of unreaped completions is greater than or equal to wc_cnt, 3503 * this function returns wc_cnt, otherwise, it returns the actual number of 3504 * unreaped completions. 3505 */ 3506 int ib_peek_cq(struct ib_cq *cq, int wc_cnt); 3507 3508 /** 3509 * ib_req_notify_cq - Request completion notification on a CQ. 3510 * @cq: The CQ to generate an event for. 3511 * @flags: 3512 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP 3513 * to request an event on the next solicited event or next work 3514 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS 3515 * may also be |ed in to request a hint about missed events, as 3516 * described below. 3517 * 3518 * Return Value: 3519 * < 0 means an error occurred while requesting notification 3520 * == 0 means notification was requested successfully, and if 3521 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events 3522 * were missed and it is safe to wait for another event. In 3523 * this case is it guaranteed that any work completions added 3524 * to the CQ since the last CQ poll will trigger a completion 3525 * notification event. 3526 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed 3527 * in. It means that the consumer must poll the CQ again to 3528 * make sure it is empty to avoid missing an event because of a 3529 * race between requesting notification and an entry being 3530 * added to the CQ. This return value means it is possible 3531 * (but not guaranteed) that a work completion has been added 3532 * to the CQ since the last poll without triggering a 3533 * completion notification event. 3534 */ 3535 static inline int ib_req_notify_cq(struct ib_cq *cq, 3536 enum ib_cq_notify_flags flags) 3537 { 3538 return cq->device->req_notify_cq(cq, flags); 3539 } 3540 3541 /** 3542 * ib_req_ncomp_notif - Request completion notification when there are 3543 * at least the specified number of unreaped completions on the CQ. 3544 * @cq: The CQ to generate an event for. 3545 * @wc_cnt: The number of unreaped completions that should be on the 3546 * CQ before an event is generated. 3547 */ 3548 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt) 3549 { 3550 return cq->device->req_ncomp_notif ? 3551 cq->device->req_ncomp_notif(cq, wc_cnt) : 3552 -ENOSYS; 3553 } 3554 3555 /** 3556 * ib_dma_mapping_error - check a DMA addr for error 3557 * @dev: The device for which the dma_addr was created 3558 * @dma_addr: The DMA address to check 3559 */ 3560 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr) 3561 { 3562 return dma_mapping_error(dev->dma_device, dma_addr); 3563 } 3564 3565 /** 3566 * ib_dma_map_single - Map a kernel virtual address to DMA address 3567 * @dev: The device for which the dma_addr is to be created 3568 * @cpu_addr: The kernel virtual address 3569 * @size: The size of the region in bytes 3570 * @direction: The direction of the DMA 3571 */ 3572 static inline u64 ib_dma_map_single(struct ib_device *dev, 3573 void *cpu_addr, size_t size, 3574 enum dma_data_direction direction) 3575 { 3576 return dma_map_single(dev->dma_device, cpu_addr, size, direction); 3577 } 3578 3579 /** 3580 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single() 3581 * @dev: The device for which the DMA address was created 3582 * @addr: The DMA address 3583 * @size: The size of the region in bytes 3584 * @direction: The direction of the DMA 3585 */ 3586 static inline void ib_dma_unmap_single(struct ib_device *dev, 3587 u64 addr, size_t size, 3588 enum dma_data_direction direction) 3589 { 3590 dma_unmap_single(dev->dma_device, addr, size, direction); 3591 } 3592 3593 /** 3594 * ib_dma_map_page - Map a physical page to DMA address 3595 * @dev: The device for which the dma_addr is to be created 3596 * @page: The page to be mapped 3597 * @offset: The offset within the page 3598 * @size: The size of the region in bytes 3599 * @direction: The direction of the DMA 3600 */ 3601 static inline u64 ib_dma_map_page(struct ib_device *dev, 3602 struct page *page, 3603 unsigned long offset, 3604 size_t size, 3605 enum dma_data_direction direction) 3606 { 3607 return dma_map_page(dev->dma_device, page, offset, size, direction); 3608 } 3609 3610 /** 3611 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page() 3612 * @dev: The device for which the DMA address was created 3613 * @addr: The DMA address 3614 * @size: The size of the region in bytes 3615 * @direction: The direction of the DMA 3616 */ 3617 static inline void ib_dma_unmap_page(struct ib_device *dev, 3618 u64 addr, size_t size, 3619 enum dma_data_direction direction) 3620 { 3621 dma_unmap_page(dev->dma_device, addr, size, direction); 3622 } 3623 3624 /** 3625 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses 3626 * @dev: The device for which the DMA addresses are to be created 3627 * @sg: The array of scatter/gather entries 3628 * @nents: The number of scatter/gather entries 3629 * @direction: The direction of the DMA 3630 */ 3631 static inline int ib_dma_map_sg(struct ib_device *dev, 3632 struct scatterlist *sg, int nents, 3633 enum dma_data_direction direction) 3634 { 3635 return dma_map_sg(dev->dma_device, sg, nents, direction); 3636 } 3637 3638 /** 3639 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses 3640 * @dev: The device for which the DMA addresses were created 3641 * @sg: The array of scatter/gather entries 3642 * @nents: The number of scatter/gather entries 3643 * @direction: The direction of the DMA 3644 */ 3645 static inline void ib_dma_unmap_sg(struct ib_device *dev, 3646 struct scatterlist *sg, int nents, 3647 enum dma_data_direction direction) 3648 { 3649 dma_unmap_sg(dev->dma_device, sg, nents, direction); 3650 } 3651 3652 static inline int ib_dma_map_sg_attrs(struct ib_device *dev, 3653 struct scatterlist *sg, int nents, 3654 enum dma_data_direction direction, 3655 unsigned long dma_attrs) 3656 { 3657 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, 3658 dma_attrs); 3659 } 3660 3661 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev, 3662 struct scatterlist *sg, int nents, 3663 enum dma_data_direction direction, 3664 unsigned long dma_attrs) 3665 { 3666 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, dma_attrs); 3667 } 3668 /** 3669 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry 3670 * @dev: The device for which the DMA addresses were created 3671 * @sg: The scatter/gather entry 3672 * 3673 * Note: this function is obsolete. To do: change all occurrences of 3674 * ib_sg_dma_address() into sg_dma_address(). 3675 */ 3676 static inline u64 ib_sg_dma_address(struct ib_device *dev, 3677 struct scatterlist *sg) 3678 { 3679 return sg_dma_address(sg); 3680 } 3681 3682 /** 3683 * ib_sg_dma_len - Return the DMA length from a scatter/gather entry 3684 * @dev: The device for which the DMA addresses were created 3685 * @sg: The scatter/gather entry 3686 * 3687 * Note: this function is obsolete. To do: change all occurrences of 3688 * ib_sg_dma_len() into sg_dma_len(). 3689 */ 3690 static inline unsigned int ib_sg_dma_len(struct ib_device *dev, 3691 struct scatterlist *sg) 3692 { 3693 return sg_dma_len(sg); 3694 } 3695 3696 /** 3697 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU 3698 * @dev: The device for which the DMA address was created 3699 * @addr: The DMA address 3700 * @size: The size of the region in bytes 3701 * @dir: The direction of the DMA 3702 */ 3703 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev, 3704 u64 addr, 3705 size_t size, 3706 enum dma_data_direction dir) 3707 { 3708 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir); 3709 } 3710 3711 /** 3712 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device 3713 * @dev: The device for which the DMA address was created 3714 * @addr: The DMA address 3715 * @size: The size of the region in bytes 3716 * @dir: The direction of the DMA 3717 */ 3718 static inline void ib_dma_sync_single_for_device(struct ib_device *dev, 3719 u64 addr, 3720 size_t size, 3721 enum dma_data_direction dir) 3722 { 3723 dma_sync_single_for_device(dev->dma_device, addr, size, dir); 3724 } 3725 3726 /** 3727 * ib_dma_alloc_coherent - Allocate memory and map it for DMA 3728 * @dev: The device for which the DMA address is requested 3729 * @size: The size of the region to allocate in bytes 3730 * @dma_handle: A pointer for returning the DMA address of the region 3731 * @flag: memory allocator flags 3732 */ 3733 static inline void *ib_dma_alloc_coherent(struct ib_device *dev, 3734 size_t size, 3735 dma_addr_t *dma_handle, 3736 gfp_t flag) 3737 { 3738 return dma_alloc_coherent(dev->dma_device, size, dma_handle, flag); 3739 } 3740 3741 /** 3742 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent() 3743 * @dev: The device for which the DMA addresses were allocated 3744 * @size: The size of the region 3745 * @cpu_addr: the address returned by ib_dma_alloc_coherent() 3746 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent() 3747 */ 3748 static inline void ib_dma_free_coherent(struct ib_device *dev, 3749 size_t size, void *cpu_addr, 3750 dma_addr_t dma_handle) 3751 { 3752 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle); 3753 } 3754 3755 /** 3756 * ib_dereg_mr - Deregisters a memory region and removes it from the 3757 * HCA translation table. 3758 * @mr: The memory region to deregister. 3759 * 3760 * This function can fail, if the memory region has memory windows bound to it. 3761 */ 3762 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata); 3763 3764 /** 3765 * ib_dereg_mr - Deregisters a kernel memory region and removes it from the 3766 * HCA translation table. 3767 * @mr: The memory region to deregister. 3768 * 3769 * This function can fail, if the memory region has memory windows bound to it. 3770 * 3771 * NOTE: for user mr use ib_dereg_mr_user with valid udata! 3772 */ 3773 static inline int ib_dereg_mr(struct ib_mr *mr) 3774 { 3775 return ib_dereg_mr_user(mr, NULL); 3776 } 3777 3778 struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type, 3779 u32 max_num_sg, struct ib_udata *udata); 3780 3781 static inline struct ib_mr *ib_alloc_mr(struct ib_pd *pd, 3782 enum ib_mr_type mr_type, u32 max_num_sg) 3783 { 3784 return ib_alloc_mr_user(pd, mr_type, max_num_sg, NULL); 3785 } 3786 3787 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd, 3788 u32 max_num_data_sg, 3789 u32 max_num_meta_sg); 3790 3791 /** 3792 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR 3793 * R_Key and L_Key. 3794 * @mr - struct ib_mr pointer to be updated. 3795 * @newkey - new key to be used. 3796 */ 3797 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey) 3798 { 3799 mr->lkey = (mr->lkey & 0xffffff00) | newkey; 3800 mr->rkey = (mr->rkey & 0xffffff00) | newkey; 3801 } 3802 3803 /** 3804 * ib_inc_rkey - increments the key portion of the given rkey. Can be used 3805 * for calculating a new rkey for type 2 memory windows. 3806 * @rkey - the rkey to increment. 3807 */ 3808 static inline u32 ib_inc_rkey(u32 rkey) 3809 { 3810 const u32 mask = 0x000000ff; 3811 return ((rkey + 1) & mask) | (rkey & ~mask); 3812 } 3813 3814 /** 3815 * ib_alloc_fmr - Allocates a unmapped fast memory region. 3816 * @pd: The protection domain associated with the unmapped region. 3817 * @mr_access_flags: Specifies the memory access rights. 3818 * @fmr_attr: Attributes of the unmapped region. 3819 * 3820 * A fast memory region must be mapped before it can be used as part of 3821 * a work request. 3822 */ 3823 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 3824 int mr_access_flags, 3825 struct ib_fmr_attr *fmr_attr); 3826 3827 /** 3828 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region. 3829 * @fmr: The fast memory region to associate with the pages. 3830 * @page_list: An array of physical pages to map to the fast memory region. 3831 * @list_len: The number of pages in page_list. 3832 * @iova: The I/O virtual address to use with the mapped region. 3833 */ 3834 static inline int ib_map_phys_fmr(struct ib_fmr *fmr, 3835 u64 *page_list, int list_len, 3836 u64 iova) 3837 { 3838 return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova); 3839 } 3840 3841 /** 3842 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions. 3843 * @fmr_list: A linked list of fast memory regions to unmap. 3844 */ 3845 int ib_unmap_fmr(struct list_head *fmr_list); 3846 3847 /** 3848 * ib_dealloc_fmr - Deallocates a fast memory region. 3849 * @fmr: The fast memory region to deallocate. 3850 */ 3851 int ib_dealloc_fmr(struct ib_fmr *fmr); 3852 3853 /** 3854 * ib_attach_mcast - Attaches the specified QP to a multicast group. 3855 * @qp: QP to attach to the multicast group. The QP must be type 3856 * IB_QPT_UD. 3857 * @gid: Multicast group GID. 3858 * @lid: Multicast group LID in host byte order. 3859 * 3860 * In order to send and receive multicast packets, subnet 3861 * administration must have created the multicast group and configured 3862 * the fabric appropriately. The port associated with the specified 3863 * QP must also be a member of the multicast group. 3864 */ 3865 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 3866 3867 /** 3868 * ib_detach_mcast - Detaches the specified QP from a multicast group. 3869 * @qp: QP to detach from the multicast group. 3870 * @gid: Multicast group GID. 3871 * @lid: Multicast group LID in host byte order. 3872 */ 3873 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 3874 3875 /** 3876 * ib_alloc_xrcd - Allocates an XRC domain. 3877 * @device: The device on which to allocate the XRC domain. 3878 * @caller: Module name for kernel consumers 3879 */ 3880 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller); 3881 #define ib_alloc_xrcd(device) \ 3882 __ib_alloc_xrcd((device), "ibcore") 3883 3884 /** 3885 * ib_dealloc_xrcd - Deallocates an XRC domain. 3886 * @xrcd: The XRC domain to deallocate. 3887 * @udata: Valid user data or NULL for kernel object 3888 */ 3889 int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata); 3890 3891 static inline int ib_check_mr_access(int flags) 3892 { 3893 /* 3894 * Local write permission is required if remote write or 3895 * remote atomic permission is also requested. 3896 */ 3897 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && 3898 !(flags & IB_ACCESS_LOCAL_WRITE)) 3899 return -EINVAL; 3900 3901 if (flags & ~IB_ACCESS_SUPPORTED) 3902 return -EINVAL; 3903 3904 return 0; 3905 } 3906 3907 static inline bool ib_access_writable(int access_flags) 3908 { 3909 /* 3910 * We have writable memory backing the MR if any of the following 3911 * access flags are set. "Local write" and "remote write" obviously 3912 * require write access. "Remote atomic" can do things like fetch and 3913 * add, which will modify memory, and "MW bind" can change permissions 3914 * by binding a window. 3915 */ 3916 return access_flags & 3917 (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | 3918 IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND); 3919 } 3920 3921 /** 3922 * ib_check_mr_status: lightweight check of MR status. 3923 * This routine may provide status checks on a selected 3924 * ib_mr. first use is for signature status check. 3925 * 3926 * @mr: A memory region. 3927 * @check_mask: Bitmask of which checks to perform from 3928 * ib_mr_status_check enumeration. 3929 * @mr_status: The container of relevant status checks. 3930 * failed checks will be indicated in the status bitmask 3931 * and the relevant info shall be in the error item. 3932 */ 3933 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 3934 struct ib_mr_status *mr_status); 3935 3936 if_t ib_get_net_dev_by_params(struct ib_device *dev, u8 port, 3937 u16 pkey, const union ib_gid *gid, 3938 const struct sockaddr *addr); 3939 struct ib_wq *ib_create_wq(struct ib_pd *pd, 3940 struct ib_wq_init_attr *init_attr); 3941 int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata); 3942 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *attr, 3943 u32 wq_attr_mask); 3944 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 3945 struct ib_rwq_ind_table_init_attr* 3946 wq_ind_table_init_attr); 3947 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table); 3948 3949 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 3950 unsigned int *sg_offset, unsigned int page_size); 3951 3952 static inline int 3953 ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 3954 unsigned int *sg_offset, unsigned int page_size) 3955 { 3956 int n; 3957 3958 n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, page_size); 3959 mr->iova = 0; 3960 3961 return n; 3962 } 3963 3964 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 3965 unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64)); 3966 3967 void ib_drain_rq(struct ib_qp *qp); 3968 void ib_drain_sq(struct ib_qp *qp); 3969 void ib_drain_qp(struct ib_qp *qp); 3970 3971 struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile); 3972 3973 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs); 3974 3975 static inline u8 *rdma_ah_retrieve_dmac(struct rdma_ah_attr *attr) 3976 { 3977 if (attr->type == RDMA_AH_ATTR_TYPE_ROCE) 3978 return attr->roce.dmac; 3979 return NULL; 3980 } 3981 3982 static inline void rdma_ah_set_dlid(struct rdma_ah_attr *attr, u32 dlid) 3983 { 3984 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 3985 attr->ib.dlid = (u16)dlid; 3986 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 3987 attr->opa.dlid = dlid; 3988 } 3989 3990 static inline u32 rdma_ah_get_dlid(const struct rdma_ah_attr *attr) 3991 { 3992 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 3993 return attr->ib.dlid; 3994 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 3995 return attr->opa.dlid; 3996 return 0; 3997 } 3998 3999 static inline void rdma_ah_set_sl(struct rdma_ah_attr *attr, u8 sl) 4000 { 4001 attr->sl = sl; 4002 } 4003 4004 static inline u8 rdma_ah_get_sl(const struct rdma_ah_attr *attr) 4005 { 4006 return attr->sl; 4007 } 4008 4009 static inline void rdma_ah_set_path_bits(struct rdma_ah_attr *attr, 4010 u8 src_path_bits) 4011 { 4012 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4013 attr->ib.src_path_bits = src_path_bits; 4014 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4015 attr->opa.src_path_bits = src_path_bits; 4016 } 4017 4018 static inline u8 rdma_ah_get_path_bits(const struct rdma_ah_attr *attr) 4019 { 4020 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4021 return attr->ib.src_path_bits; 4022 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4023 return attr->opa.src_path_bits; 4024 return 0; 4025 } 4026 4027 static inline void rdma_ah_set_make_grd(struct rdma_ah_attr *attr, 4028 bool make_grd) 4029 { 4030 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4031 attr->opa.make_grd = make_grd; 4032 } 4033 4034 static inline bool rdma_ah_get_make_grd(const struct rdma_ah_attr *attr) 4035 { 4036 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4037 return attr->opa.make_grd; 4038 return false; 4039 } 4040 4041 static inline void rdma_ah_set_port_num(struct rdma_ah_attr *attr, u8 port_num) 4042 { 4043 attr->port_num = port_num; 4044 } 4045 4046 static inline u8 rdma_ah_get_port_num(const struct rdma_ah_attr *attr) 4047 { 4048 return attr->port_num; 4049 } 4050 4051 static inline void rdma_ah_set_static_rate(struct rdma_ah_attr *attr, 4052 u8 static_rate) 4053 { 4054 attr->static_rate = static_rate; 4055 } 4056 4057 static inline u8 rdma_ah_get_static_rate(const struct rdma_ah_attr *attr) 4058 { 4059 return attr->static_rate; 4060 } 4061 4062 static inline void rdma_ah_set_ah_flags(struct rdma_ah_attr *attr, 4063 enum ib_ah_flags flag) 4064 { 4065 attr->ah_flags = flag; 4066 } 4067 4068 static inline enum ib_ah_flags 4069 rdma_ah_get_ah_flags(const struct rdma_ah_attr *attr) 4070 { 4071 return attr->ah_flags; 4072 } 4073 4074 static inline const struct ib_global_route 4075 *rdma_ah_read_grh(const struct rdma_ah_attr *attr) 4076 { 4077 return &attr->grh; 4078 } 4079 4080 /*To retrieve and modify the grh */ 4081 static inline struct ib_global_route 4082 *rdma_ah_retrieve_grh(struct rdma_ah_attr *attr) 4083 { 4084 return &attr->grh; 4085 } 4086 4087 static inline void rdma_ah_set_dgid_raw(struct rdma_ah_attr *attr, void *dgid) 4088 { 4089 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4090 4091 memcpy(grh->dgid.raw, dgid, sizeof(grh->dgid)); 4092 } 4093 4094 static inline void rdma_ah_set_subnet_prefix(struct rdma_ah_attr *attr, 4095 __be64 prefix) 4096 { 4097 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4098 4099 grh->dgid.global.subnet_prefix = prefix; 4100 } 4101 4102 static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr, 4103 __be64 if_id) 4104 { 4105 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4106 4107 grh->dgid.global.interface_id = if_id; 4108 } 4109 4110 static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr, 4111 union ib_gid *dgid, u32 flow_label, 4112 u8 sgid_index, u8 hop_limit, 4113 u8 traffic_class) 4114 { 4115 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4116 4117 attr->ah_flags = IB_AH_GRH; 4118 if (dgid) 4119 grh->dgid = *dgid; 4120 grh->flow_label = flow_label; 4121 grh->sgid_index = sgid_index; 4122 grh->hop_limit = hop_limit; 4123 grh->traffic_class = traffic_class; 4124 grh->sgid_attr = NULL; 4125 } 4126 4127 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr); 4128 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid, 4129 u32 flow_label, u8 hop_limit, u8 traffic_class, 4130 const struct ib_gid_attr *sgid_attr); 4131 void rdma_copy_ah_attr(struct rdma_ah_attr *dest, 4132 const struct rdma_ah_attr *src); 4133 void rdma_replace_ah_attr(struct rdma_ah_attr *old, 4134 const struct rdma_ah_attr *new); 4135 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src); 4136 4137 /** 4138 * rdma_ah_find_type - Return address handle type. 4139 * 4140 * @dev: Device to be checked 4141 * @port_num: Port number 4142 */ 4143 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev, 4144 u8 port_num) 4145 { 4146 if (rdma_protocol_roce(dev, port_num)) 4147 return RDMA_AH_ATTR_TYPE_ROCE; 4148 if (rdma_protocol_ib(dev, port_num)) { 4149 if (rdma_cap_opa_ah(dev, port_num)) 4150 return RDMA_AH_ATTR_TYPE_OPA; 4151 return RDMA_AH_ATTR_TYPE_IB; 4152 } 4153 4154 return RDMA_AH_ATTR_TYPE_UNDEFINED; 4155 } 4156 4157 /** 4158 * ib_lid_cpu16 - Return lid in 16bit CPU encoding. 4159 * In the current implementation the only way to get 4160 * get the 32bit lid is from other sources for OPA. 4161 * For IB, lids will always be 16bits so cast the 4162 * value accordingly. 4163 * 4164 * @lid: A 32bit LID 4165 */ 4166 static inline u16 ib_lid_cpu16(u32 lid) 4167 { 4168 WARN_ON_ONCE(lid & 0xFFFF0000); 4169 return (u16)lid; 4170 } 4171 4172 /** 4173 * ib_lid_be16 - Return lid in 16bit BE encoding. 4174 * 4175 * @lid: A 32bit LID 4176 */ 4177 static inline __be16 ib_lid_be16(u32 lid) 4178 { 4179 WARN_ON_ONCE(lid & 0xFFFF0000); 4180 return cpu_to_be16((u16)lid); 4181 } 4182 4183 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MIN (0xC000) 4184 #define IB_GRH_FLOWLABEL_MASK (0x000FFFFF) 4185 4186 /** 4187 * rdma_flow_label_to_udp_sport - generate a RoCE v2 UDP src port value based 4188 * on the flow_label 4189 * 4190 * This function will convert the 20 bit flow_label input to a valid RoCE v2 4191 * UDP src port 14 bit value. All RoCE V2 drivers should use this same 4192 * convention. 4193 */ 4194 static inline u16 rdma_flow_label_to_udp_sport(u32 fl) 4195 { 4196 u32 fl_low = fl & 0x03fff, fl_high = fl & 0xFC000; 4197 4198 fl_low ^= fl_high >> 14; 4199 return (u16)(fl_low | IB_ROCE_UDP_ENCAP_VALID_PORT_MIN); 4200 } 4201 4202 /** 4203 * rdma_calc_flow_label - generate a RDMA symmetric flow label value based on 4204 * local and remote qpn values 4205 * 4206 * This function folded the multiplication results of two qpns, 24 bit each, 4207 * fields, and converts it to a 20 bit results. 4208 * 4209 * This function will create symmetric flow_label value based on the local 4210 * and remote qpn values. this will allow both the requester and responder 4211 * to calculate the same flow_label for a given connection. 4212 * 4213 * This helper function should be used by driver in case the upper layer 4214 * provide a zero flow_label value. This is to improve entropy of RDMA 4215 * traffic in the network. 4216 */ 4217 static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn) 4218 { 4219 u64 v = (u64)lqpn * rqpn; 4220 4221 v ^= v >> 20; 4222 v ^= v >> 40; 4223 4224 return (u32)(v & IB_GRH_FLOWLABEL_MASK); 4225 } 4226 4227 /** 4228 * rdma_get_udp_sport - Calculate and set UDP source port based on the flow 4229 * label. If flow label is not defined in GRH then 4230 * calculate it based on lqpn/rqpn. 4231 * 4232 * @fl: flow label from GRH 4233 * @lqpn: local qp number 4234 * @rqpn: remote qp number 4235 */ 4236 static inline u16 rdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn) 4237 { 4238 if (!fl) 4239 fl = rdma_calc_flow_label(lqpn, rqpn); 4240 4241 return rdma_flow_label_to_udp_sport(fl); 4242 } 4243 #endif /* IB_VERBS_H */ 4244