1 /* 2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved. 4 * Copyright (c) 2004 Intel Corporation. All rights reserved. 5 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 8 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 9 * 10 * This software is available to you under a choice of one of two 11 * licenses. You may choose to be licensed under the terms of the GNU 12 * General Public License (GPL) Version 2, available from the file 13 * COPYING in the main directory of this source tree, or the 14 * OpenIB.org BSD license below: 15 * 16 * Redistribution and use in source and binary forms, with or 17 * without modification, are permitted provided that the following 18 * conditions are met: 19 * 20 * - Redistributions of source code must retain the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer. 23 * 24 * - Redistributions in binary form must reproduce the above 25 * copyright notice, this list of conditions and the following 26 * disclaimer in the documentation and/or other materials 27 * provided with the distribution. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 36 * SOFTWARE. 37 */ 38 39 #if !defined(IB_VERBS_H) 40 #define IB_VERBS_H 41 42 #include <linux/types.h> 43 #include <linux/device.h> 44 #include <linux/dma-mapping.h> 45 #include <linux/kref.h> 46 #include <linux/list.h> 47 #include <linux/rwsem.h> 48 #include <linux/workqueue.h> 49 #include <linux/irq_poll.h> 50 #include <uapi/linux/if_ether.h> 51 #include <net/ipv6.h> 52 #include <net/ip.h> 53 #include <linux/string.h> 54 #include <linux/slab.h> 55 #include <linux/netdevice.h> 56 #include <linux/refcount.h> 57 #include <linux/if_link.h> 58 #include <linux/atomic.h> 59 #include <linux/mmu_notifier.h> 60 #include <linux/uaccess.h> 61 #include <linux/cgroup_rdma.h> 62 #include <uapi/rdma/ib_user_verbs.h> 63 #include <rdma/restrack.h> 64 #include <uapi/rdma/rdma_user_ioctl.h> 65 #include <uapi/rdma/ib_user_ioctl_verbs.h> 66 67 #define IB_FW_VERSION_NAME_MAX ETHTOOL_FWVERS_LEN 68 69 struct ib_umem_odp; 70 71 extern struct workqueue_struct *ib_wq; 72 extern struct workqueue_struct *ib_comp_wq; 73 extern struct workqueue_struct *ib_comp_unbound_wq; 74 75 union ib_gid { 76 u8 raw[16]; 77 struct { 78 __be64 subnet_prefix; 79 __be64 interface_id; 80 } global; 81 }; 82 83 extern union ib_gid zgid; 84 85 enum ib_gid_type { 86 /* If link layer is Ethernet, this is RoCE V1 */ 87 IB_GID_TYPE_IB = 0, 88 IB_GID_TYPE_ROCE = 0, 89 IB_GID_TYPE_ROCE_UDP_ENCAP = 1, 90 IB_GID_TYPE_SIZE 91 }; 92 93 #define ROCE_V2_UDP_DPORT 4791 94 struct ib_gid_attr { 95 struct net_device *ndev; 96 struct ib_device *device; 97 union ib_gid gid; 98 enum ib_gid_type gid_type; 99 u16 index; 100 u8 port_num; 101 }; 102 103 enum rdma_node_type { 104 /* IB values map to NodeInfo:NodeType. */ 105 RDMA_NODE_IB_CA = 1, 106 RDMA_NODE_IB_SWITCH, 107 RDMA_NODE_IB_ROUTER, 108 RDMA_NODE_RNIC, 109 RDMA_NODE_USNIC, 110 RDMA_NODE_USNIC_UDP, 111 }; 112 113 enum { 114 /* set the local administered indication */ 115 IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) | 2, 116 }; 117 118 enum rdma_transport_type { 119 RDMA_TRANSPORT_IB, 120 RDMA_TRANSPORT_IWARP, 121 RDMA_TRANSPORT_USNIC, 122 RDMA_TRANSPORT_USNIC_UDP 123 }; 124 125 enum rdma_protocol_type { 126 RDMA_PROTOCOL_IB, 127 RDMA_PROTOCOL_IBOE, 128 RDMA_PROTOCOL_IWARP, 129 RDMA_PROTOCOL_USNIC_UDP 130 }; 131 132 __attribute_const__ enum rdma_transport_type 133 rdma_node_get_transport(enum rdma_node_type node_type); 134 135 enum rdma_network_type { 136 RDMA_NETWORK_IB, 137 RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB, 138 RDMA_NETWORK_IPV4, 139 RDMA_NETWORK_IPV6 140 }; 141 142 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type) 143 { 144 if (network_type == RDMA_NETWORK_IPV4 || 145 network_type == RDMA_NETWORK_IPV6) 146 return IB_GID_TYPE_ROCE_UDP_ENCAP; 147 148 /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */ 149 return IB_GID_TYPE_IB; 150 } 151 152 static inline enum rdma_network_type 153 rdma_gid_attr_network_type(const struct ib_gid_attr *attr) 154 { 155 if (attr->gid_type == IB_GID_TYPE_IB) 156 return RDMA_NETWORK_IB; 157 158 if (ipv6_addr_v4mapped((struct in6_addr *)&attr->gid)) 159 return RDMA_NETWORK_IPV4; 160 else 161 return RDMA_NETWORK_IPV6; 162 } 163 164 enum rdma_link_layer { 165 IB_LINK_LAYER_UNSPECIFIED, 166 IB_LINK_LAYER_INFINIBAND, 167 IB_LINK_LAYER_ETHERNET, 168 }; 169 170 enum ib_device_cap_flags { 171 IB_DEVICE_RESIZE_MAX_WR = (1 << 0), 172 IB_DEVICE_BAD_PKEY_CNTR = (1 << 1), 173 IB_DEVICE_BAD_QKEY_CNTR = (1 << 2), 174 IB_DEVICE_RAW_MULTI = (1 << 3), 175 IB_DEVICE_AUTO_PATH_MIG = (1 << 4), 176 IB_DEVICE_CHANGE_PHY_PORT = (1 << 5), 177 IB_DEVICE_UD_AV_PORT_ENFORCE = (1 << 6), 178 IB_DEVICE_CURR_QP_STATE_MOD = (1 << 7), 179 IB_DEVICE_SHUTDOWN_PORT = (1 << 8), 180 /* Not in use, former INIT_TYPE = (1 << 9),*/ 181 IB_DEVICE_PORT_ACTIVE_EVENT = (1 << 10), 182 IB_DEVICE_SYS_IMAGE_GUID = (1 << 11), 183 IB_DEVICE_RC_RNR_NAK_GEN = (1 << 12), 184 IB_DEVICE_SRQ_RESIZE = (1 << 13), 185 IB_DEVICE_N_NOTIFY_CQ = (1 << 14), 186 187 /* 188 * This device supports a per-device lkey or stag that can be 189 * used without performing a memory registration for the local 190 * memory. Note that ULPs should never check this flag, but 191 * instead of use the local_dma_lkey flag in the ib_pd structure, 192 * which will always contain a usable lkey. 193 */ 194 IB_DEVICE_LOCAL_DMA_LKEY = (1 << 15), 195 /* Reserved, old SEND_W_INV = (1 << 16),*/ 196 IB_DEVICE_MEM_WINDOW = (1 << 17), 197 /* 198 * Devices should set IB_DEVICE_UD_IP_SUM if they support 199 * insertion of UDP and TCP checksum on outgoing UD IPoIB 200 * messages and can verify the validity of checksum for 201 * incoming messages. Setting this flag implies that the 202 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode. 203 */ 204 IB_DEVICE_UD_IP_CSUM = (1 << 18), 205 IB_DEVICE_UD_TSO = (1 << 19), 206 IB_DEVICE_XRC = (1 << 20), 207 208 /* 209 * This device supports the IB "base memory management extension", 210 * which includes support for fast registrations (IB_WR_REG_MR, 211 * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should 212 * also be set by any iWarp device which must support FRs to comply 213 * to the iWarp verbs spec. iWarp devices also support the 214 * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the 215 * stag. 216 */ 217 IB_DEVICE_MEM_MGT_EXTENSIONS = (1 << 21), 218 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1 << 22), 219 IB_DEVICE_MEM_WINDOW_TYPE_2A = (1 << 23), 220 IB_DEVICE_MEM_WINDOW_TYPE_2B = (1 << 24), 221 IB_DEVICE_RC_IP_CSUM = (1 << 25), 222 /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */ 223 IB_DEVICE_RAW_IP_CSUM = (1 << 26), 224 /* 225 * Devices should set IB_DEVICE_CROSS_CHANNEL if they 226 * support execution of WQEs that involve synchronization 227 * of I/O operations with single completion queue managed 228 * by hardware. 229 */ 230 IB_DEVICE_CROSS_CHANNEL = (1 << 27), 231 IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29), 232 IB_DEVICE_SIGNATURE_HANDOVER = (1 << 30), 233 IB_DEVICE_ON_DEMAND_PAGING = (1ULL << 31), 234 IB_DEVICE_SG_GAPS_REG = (1ULL << 32), 235 IB_DEVICE_VIRTUAL_FUNCTION = (1ULL << 33), 236 /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */ 237 IB_DEVICE_RAW_SCATTER_FCS = (1ULL << 34), 238 IB_DEVICE_RDMA_NETDEV_OPA_VNIC = (1ULL << 35), 239 /* The device supports padding incoming writes to cacheline. */ 240 IB_DEVICE_PCI_WRITE_END_PADDING = (1ULL << 36), 241 }; 242 243 enum ib_signature_prot_cap { 244 IB_PROT_T10DIF_TYPE_1 = 1, 245 IB_PROT_T10DIF_TYPE_2 = 1 << 1, 246 IB_PROT_T10DIF_TYPE_3 = 1 << 2, 247 }; 248 249 enum ib_signature_guard_cap { 250 IB_GUARD_T10DIF_CRC = 1, 251 IB_GUARD_T10DIF_CSUM = 1 << 1, 252 }; 253 254 enum ib_atomic_cap { 255 IB_ATOMIC_NONE, 256 IB_ATOMIC_HCA, 257 IB_ATOMIC_GLOB 258 }; 259 260 enum ib_odp_general_cap_bits { 261 IB_ODP_SUPPORT = 1 << 0, 262 IB_ODP_SUPPORT_IMPLICIT = 1 << 1, 263 }; 264 265 enum ib_odp_transport_cap_bits { 266 IB_ODP_SUPPORT_SEND = 1 << 0, 267 IB_ODP_SUPPORT_RECV = 1 << 1, 268 IB_ODP_SUPPORT_WRITE = 1 << 2, 269 IB_ODP_SUPPORT_READ = 1 << 3, 270 IB_ODP_SUPPORT_ATOMIC = 1 << 4, 271 IB_ODP_SUPPORT_SRQ_RECV = 1 << 5, 272 }; 273 274 struct ib_odp_caps { 275 uint64_t general_caps; 276 struct { 277 uint32_t rc_odp_caps; 278 uint32_t uc_odp_caps; 279 uint32_t ud_odp_caps; 280 uint32_t xrc_odp_caps; 281 } per_transport_caps; 282 }; 283 284 struct ib_rss_caps { 285 /* Corresponding bit will be set if qp type from 286 * 'enum ib_qp_type' is supported, e.g. 287 * supported_qpts |= 1 << IB_QPT_UD 288 */ 289 u32 supported_qpts; 290 u32 max_rwq_indirection_tables; 291 u32 max_rwq_indirection_table_size; 292 }; 293 294 enum ib_tm_cap_flags { 295 /* Support tag matching on RC transport */ 296 IB_TM_CAP_RC = 1 << 0, 297 }; 298 299 struct ib_tm_caps { 300 /* Max size of RNDV header */ 301 u32 max_rndv_hdr_size; 302 /* Max number of entries in tag matching list */ 303 u32 max_num_tags; 304 /* From enum ib_tm_cap_flags */ 305 u32 flags; 306 /* Max number of outstanding list operations */ 307 u32 max_ops; 308 /* Max number of SGE in tag matching entry */ 309 u32 max_sge; 310 }; 311 312 struct ib_cq_init_attr { 313 unsigned int cqe; 314 int comp_vector; 315 u32 flags; 316 }; 317 318 enum ib_cq_attr_mask { 319 IB_CQ_MODERATE = 1 << 0, 320 }; 321 322 struct ib_cq_caps { 323 u16 max_cq_moderation_count; 324 u16 max_cq_moderation_period; 325 }; 326 327 struct ib_dm_mr_attr { 328 u64 length; 329 u64 offset; 330 u32 access_flags; 331 }; 332 333 struct ib_dm_alloc_attr { 334 u64 length; 335 u32 alignment; 336 u32 flags; 337 }; 338 339 struct ib_device_attr { 340 u64 fw_ver; 341 __be64 sys_image_guid; 342 u64 max_mr_size; 343 u64 page_size_cap; 344 u32 vendor_id; 345 u32 vendor_part_id; 346 u32 hw_ver; 347 int max_qp; 348 int max_qp_wr; 349 u64 device_cap_flags; 350 int max_send_sge; 351 int max_recv_sge; 352 int max_sge_rd; 353 int max_cq; 354 int max_cqe; 355 int max_mr; 356 int max_pd; 357 int max_qp_rd_atom; 358 int max_ee_rd_atom; 359 int max_res_rd_atom; 360 int max_qp_init_rd_atom; 361 int max_ee_init_rd_atom; 362 enum ib_atomic_cap atomic_cap; 363 enum ib_atomic_cap masked_atomic_cap; 364 int max_ee; 365 int max_rdd; 366 int max_mw; 367 int max_raw_ipv6_qp; 368 int max_raw_ethy_qp; 369 int max_mcast_grp; 370 int max_mcast_qp_attach; 371 int max_total_mcast_qp_attach; 372 int max_ah; 373 int max_fmr; 374 int max_map_per_fmr; 375 int max_srq; 376 int max_srq_wr; 377 int max_srq_sge; 378 unsigned int max_fast_reg_page_list_len; 379 u16 max_pkeys; 380 u8 local_ca_ack_delay; 381 int sig_prot_cap; 382 int sig_guard_cap; 383 struct ib_odp_caps odp_caps; 384 uint64_t timestamp_mask; 385 uint64_t hca_core_clock; /* in KHZ */ 386 struct ib_rss_caps rss_caps; 387 u32 max_wq_type_rq; 388 u32 raw_packet_caps; /* Use ib_raw_packet_caps enum */ 389 struct ib_tm_caps tm_caps; 390 struct ib_cq_caps cq_caps; 391 u64 max_dm_size; 392 }; 393 394 enum ib_mtu { 395 IB_MTU_256 = 1, 396 IB_MTU_512 = 2, 397 IB_MTU_1024 = 3, 398 IB_MTU_2048 = 4, 399 IB_MTU_4096 = 5 400 }; 401 402 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu) 403 { 404 switch (mtu) { 405 case IB_MTU_256: return 256; 406 case IB_MTU_512: return 512; 407 case IB_MTU_1024: return 1024; 408 case IB_MTU_2048: return 2048; 409 case IB_MTU_4096: return 4096; 410 default: return -1; 411 } 412 } 413 414 static inline enum ib_mtu ib_mtu_int_to_enum(int mtu) 415 { 416 if (mtu >= 4096) 417 return IB_MTU_4096; 418 else if (mtu >= 2048) 419 return IB_MTU_2048; 420 else if (mtu >= 1024) 421 return IB_MTU_1024; 422 else if (mtu >= 512) 423 return IB_MTU_512; 424 else 425 return IB_MTU_256; 426 } 427 428 enum ib_port_state { 429 IB_PORT_NOP = 0, 430 IB_PORT_DOWN = 1, 431 IB_PORT_INIT = 2, 432 IB_PORT_ARMED = 3, 433 IB_PORT_ACTIVE = 4, 434 IB_PORT_ACTIVE_DEFER = 5 435 }; 436 437 enum ib_port_width { 438 IB_WIDTH_1X = 1, 439 IB_WIDTH_2X = 16, 440 IB_WIDTH_4X = 2, 441 IB_WIDTH_8X = 4, 442 IB_WIDTH_12X = 8 443 }; 444 445 static inline int ib_width_enum_to_int(enum ib_port_width width) 446 { 447 switch (width) { 448 case IB_WIDTH_1X: return 1; 449 case IB_WIDTH_2X: return 2; 450 case IB_WIDTH_4X: return 4; 451 case IB_WIDTH_8X: return 8; 452 case IB_WIDTH_12X: return 12; 453 default: return -1; 454 } 455 } 456 457 enum ib_port_speed { 458 IB_SPEED_SDR = 1, 459 IB_SPEED_DDR = 2, 460 IB_SPEED_QDR = 4, 461 IB_SPEED_FDR10 = 8, 462 IB_SPEED_FDR = 16, 463 IB_SPEED_EDR = 32, 464 IB_SPEED_HDR = 64 465 }; 466 467 /** 468 * struct rdma_hw_stats 469 * @lock - Mutex to protect parallel write access to lifespan and values 470 * of counters, which are 64bits and not guaranteeed to be written 471 * atomicaly on 32bits systems. 472 * @timestamp - Used by the core code to track when the last update was 473 * @lifespan - Used by the core code to determine how old the counters 474 * should be before being updated again. Stored in jiffies, defaults 475 * to 10 milliseconds, drivers can override the default be specifying 476 * their own value during their allocation routine. 477 * @name - Array of pointers to static names used for the counters in 478 * directory. 479 * @num_counters - How many hardware counters there are. If name is 480 * shorter than this number, a kernel oops will result. Driver authors 481 * are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters) 482 * in their code to prevent this. 483 * @value - Array of u64 counters that are accessed by the sysfs code and 484 * filled in by the drivers get_stats routine 485 */ 486 struct rdma_hw_stats { 487 struct mutex lock; /* Protect lifespan and values[] */ 488 unsigned long timestamp; 489 unsigned long lifespan; 490 const char * const *names; 491 int num_counters; 492 u64 value[]; 493 }; 494 495 #define RDMA_HW_STATS_DEFAULT_LIFESPAN 10 496 /** 497 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct 498 * for drivers. 499 * @names - Array of static const char * 500 * @num_counters - How many elements in array 501 * @lifespan - How many milliseconds between updates 502 */ 503 static inline struct rdma_hw_stats *rdma_alloc_hw_stats_struct( 504 const char * const *names, int num_counters, 505 unsigned long lifespan) 506 { 507 struct rdma_hw_stats *stats; 508 509 stats = kzalloc(sizeof(*stats) + num_counters * sizeof(u64), 510 GFP_KERNEL); 511 if (!stats) 512 return NULL; 513 stats->names = names; 514 stats->num_counters = num_counters; 515 stats->lifespan = msecs_to_jiffies(lifespan); 516 517 return stats; 518 } 519 520 521 /* Define bits for the various functionality this port needs to be supported by 522 * the core. 523 */ 524 /* Management 0x00000FFF */ 525 #define RDMA_CORE_CAP_IB_MAD 0x00000001 526 #define RDMA_CORE_CAP_IB_SMI 0x00000002 527 #define RDMA_CORE_CAP_IB_CM 0x00000004 528 #define RDMA_CORE_CAP_IW_CM 0x00000008 529 #define RDMA_CORE_CAP_IB_SA 0x00000010 530 #define RDMA_CORE_CAP_OPA_MAD 0x00000020 531 532 /* Address format 0x000FF000 */ 533 #define RDMA_CORE_CAP_AF_IB 0x00001000 534 #define RDMA_CORE_CAP_ETH_AH 0x00002000 535 #define RDMA_CORE_CAP_OPA_AH 0x00004000 536 #define RDMA_CORE_CAP_IB_GRH_REQUIRED 0x00008000 537 538 /* Protocol 0xFFF00000 */ 539 #define RDMA_CORE_CAP_PROT_IB 0x00100000 540 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000 541 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000 542 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000 543 #define RDMA_CORE_CAP_PROT_RAW_PACKET 0x01000000 544 #define RDMA_CORE_CAP_PROT_USNIC 0x02000000 545 546 #define RDMA_CORE_PORT_IB_GRH_REQUIRED (RDMA_CORE_CAP_IB_GRH_REQUIRED \ 547 | RDMA_CORE_CAP_PROT_ROCE \ 548 | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP) 549 550 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \ 551 | RDMA_CORE_CAP_IB_MAD \ 552 | RDMA_CORE_CAP_IB_SMI \ 553 | RDMA_CORE_CAP_IB_CM \ 554 | RDMA_CORE_CAP_IB_SA \ 555 | RDMA_CORE_CAP_AF_IB) 556 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \ 557 | RDMA_CORE_CAP_IB_MAD \ 558 | RDMA_CORE_CAP_IB_CM \ 559 | RDMA_CORE_CAP_AF_IB \ 560 | RDMA_CORE_CAP_ETH_AH) 561 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP \ 562 (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \ 563 | RDMA_CORE_CAP_IB_MAD \ 564 | RDMA_CORE_CAP_IB_CM \ 565 | RDMA_CORE_CAP_AF_IB \ 566 | RDMA_CORE_CAP_ETH_AH) 567 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \ 568 | RDMA_CORE_CAP_IW_CM) 569 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \ 570 | RDMA_CORE_CAP_OPA_MAD) 571 572 #define RDMA_CORE_PORT_RAW_PACKET (RDMA_CORE_CAP_PROT_RAW_PACKET) 573 574 #define RDMA_CORE_PORT_USNIC (RDMA_CORE_CAP_PROT_USNIC) 575 576 struct ib_port_attr { 577 u64 subnet_prefix; 578 enum ib_port_state state; 579 enum ib_mtu max_mtu; 580 enum ib_mtu active_mtu; 581 int gid_tbl_len; 582 unsigned int ip_gids:1; 583 /* This is the value from PortInfo CapabilityMask, defined by IBA */ 584 u32 port_cap_flags; 585 u32 max_msg_sz; 586 u32 bad_pkey_cntr; 587 u32 qkey_viol_cntr; 588 u16 pkey_tbl_len; 589 u32 sm_lid; 590 u32 lid; 591 u8 lmc; 592 u8 max_vl_num; 593 u8 sm_sl; 594 u8 subnet_timeout; 595 u8 init_type_reply; 596 u8 active_width; 597 u8 active_speed; 598 u8 phys_state; 599 u16 port_cap_flags2; 600 }; 601 602 enum ib_device_modify_flags { 603 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0, 604 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1 605 }; 606 607 #define IB_DEVICE_NODE_DESC_MAX 64 608 609 struct ib_device_modify { 610 u64 sys_image_guid; 611 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 612 }; 613 614 enum ib_port_modify_flags { 615 IB_PORT_SHUTDOWN = 1, 616 IB_PORT_INIT_TYPE = (1<<2), 617 IB_PORT_RESET_QKEY_CNTR = (1<<3), 618 IB_PORT_OPA_MASK_CHG = (1<<4) 619 }; 620 621 struct ib_port_modify { 622 u32 set_port_cap_mask; 623 u32 clr_port_cap_mask; 624 u8 init_type; 625 }; 626 627 enum ib_event_type { 628 IB_EVENT_CQ_ERR, 629 IB_EVENT_QP_FATAL, 630 IB_EVENT_QP_REQ_ERR, 631 IB_EVENT_QP_ACCESS_ERR, 632 IB_EVENT_COMM_EST, 633 IB_EVENT_SQ_DRAINED, 634 IB_EVENT_PATH_MIG, 635 IB_EVENT_PATH_MIG_ERR, 636 IB_EVENT_DEVICE_FATAL, 637 IB_EVENT_PORT_ACTIVE, 638 IB_EVENT_PORT_ERR, 639 IB_EVENT_LID_CHANGE, 640 IB_EVENT_PKEY_CHANGE, 641 IB_EVENT_SM_CHANGE, 642 IB_EVENT_SRQ_ERR, 643 IB_EVENT_SRQ_LIMIT_REACHED, 644 IB_EVENT_QP_LAST_WQE_REACHED, 645 IB_EVENT_CLIENT_REREGISTER, 646 IB_EVENT_GID_CHANGE, 647 IB_EVENT_WQ_FATAL, 648 }; 649 650 const char *__attribute_const__ ib_event_msg(enum ib_event_type event); 651 652 struct ib_event { 653 struct ib_device *device; 654 union { 655 struct ib_cq *cq; 656 struct ib_qp *qp; 657 struct ib_srq *srq; 658 struct ib_wq *wq; 659 u8 port_num; 660 } element; 661 enum ib_event_type event; 662 }; 663 664 struct ib_event_handler { 665 struct ib_device *device; 666 void (*handler)(struct ib_event_handler *, struct ib_event *); 667 struct list_head list; 668 }; 669 670 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \ 671 do { \ 672 (_ptr)->device = _device; \ 673 (_ptr)->handler = _handler; \ 674 INIT_LIST_HEAD(&(_ptr)->list); \ 675 } while (0) 676 677 struct ib_global_route { 678 const struct ib_gid_attr *sgid_attr; 679 union ib_gid dgid; 680 u32 flow_label; 681 u8 sgid_index; 682 u8 hop_limit; 683 u8 traffic_class; 684 }; 685 686 struct ib_grh { 687 __be32 version_tclass_flow; 688 __be16 paylen; 689 u8 next_hdr; 690 u8 hop_limit; 691 union ib_gid sgid; 692 union ib_gid dgid; 693 }; 694 695 union rdma_network_hdr { 696 struct ib_grh ibgrh; 697 struct { 698 /* The IB spec states that if it's IPv4, the header 699 * is located in the last 20 bytes of the header. 700 */ 701 u8 reserved[20]; 702 struct iphdr roce4grh; 703 }; 704 }; 705 706 #define IB_QPN_MASK 0xFFFFFF 707 708 enum { 709 IB_MULTICAST_QPN = 0xffffff 710 }; 711 712 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF) 713 #define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000) 714 715 enum ib_ah_flags { 716 IB_AH_GRH = 1 717 }; 718 719 enum ib_rate { 720 IB_RATE_PORT_CURRENT = 0, 721 IB_RATE_2_5_GBPS = 2, 722 IB_RATE_5_GBPS = 5, 723 IB_RATE_10_GBPS = 3, 724 IB_RATE_20_GBPS = 6, 725 IB_RATE_30_GBPS = 4, 726 IB_RATE_40_GBPS = 7, 727 IB_RATE_60_GBPS = 8, 728 IB_RATE_80_GBPS = 9, 729 IB_RATE_120_GBPS = 10, 730 IB_RATE_14_GBPS = 11, 731 IB_RATE_56_GBPS = 12, 732 IB_RATE_112_GBPS = 13, 733 IB_RATE_168_GBPS = 14, 734 IB_RATE_25_GBPS = 15, 735 IB_RATE_100_GBPS = 16, 736 IB_RATE_200_GBPS = 17, 737 IB_RATE_300_GBPS = 18, 738 IB_RATE_28_GBPS = 19, 739 IB_RATE_50_GBPS = 20, 740 IB_RATE_400_GBPS = 21, 741 IB_RATE_600_GBPS = 22, 742 }; 743 744 /** 745 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the 746 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be 747 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec. 748 * @rate: rate to convert. 749 */ 750 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate); 751 752 /** 753 * ib_rate_to_mbps - Convert the IB rate enum to Mbps. 754 * For example, IB_RATE_2_5_GBPS will be converted to 2500. 755 * @rate: rate to convert. 756 */ 757 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate); 758 759 760 /** 761 * enum ib_mr_type - memory region type 762 * @IB_MR_TYPE_MEM_REG: memory region that is used for 763 * normal registration 764 * @IB_MR_TYPE_SIGNATURE: memory region that is used for 765 * signature operations (data-integrity 766 * capable regions) 767 * @IB_MR_TYPE_SG_GAPS: memory region that is capable to 768 * register any arbitrary sg lists (without 769 * the normal mr constraints - see 770 * ib_map_mr_sg) 771 */ 772 enum ib_mr_type { 773 IB_MR_TYPE_MEM_REG, 774 IB_MR_TYPE_SIGNATURE, 775 IB_MR_TYPE_SG_GAPS, 776 }; 777 778 /** 779 * Signature types 780 * IB_SIG_TYPE_NONE: Unprotected. 781 * IB_SIG_TYPE_T10_DIF: Type T10-DIF 782 */ 783 enum ib_signature_type { 784 IB_SIG_TYPE_NONE, 785 IB_SIG_TYPE_T10_DIF, 786 }; 787 788 /** 789 * Signature T10-DIF block-guard types 790 * IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules. 791 * IB_T10DIF_CSUM: Corresponds to IP checksum rules. 792 */ 793 enum ib_t10_dif_bg_type { 794 IB_T10DIF_CRC, 795 IB_T10DIF_CSUM 796 }; 797 798 /** 799 * struct ib_t10_dif_domain - Parameters specific for T10-DIF 800 * domain. 801 * @bg_type: T10-DIF block guard type (CRC|CSUM) 802 * @pi_interval: protection information interval. 803 * @bg: seed of guard computation. 804 * @app_tag: application tag of guard block 805 * @ref_tag: initial guard block reference tag. 806 * @ref_remap: Indicate wethear the reftag increments each block 807 * @app_escape: Indicate to skip block check if apptag=0xffff 808 * @ref_escape: Indicate to skip block check if reftag=0xffffffff 809 * @apptag_check_mask: check bitmask of application tag. 810 */ 811 struct ib_t10_dif_domain { 812 enum ib_t10_dif_bg_type bg_type; 813 u16 pi_interval; 814 u16 bg; 815 u16 app_tag; 816 u32 ref_tag; 817 bool ref_remap; 818 bool app_escape; 819 bool ref_escape; 820 u16 apptag_check_mask; 821 }; 822 823 /** 824 * struct ib_sig_domain - Parameters for signature domain 825 * @sig_type: specific signauture type 826 * @sig: union of all signature domain attributes that may 827 * be used to set domain layout. 828 */ 829 struct ib_sig_domain { 830 enum ib_signature_type sig_type; 831 union { 832 struct ib_t10_dif_domain dif; 833 } sig; 834 }; 835 836 /** 837 * struct ib_sig_attrs - Parameters for signature handover operation 838 * @check_mask: bitmask for signature byte check (8 bytes) 839 * @mem: memory domain layout desciptor. 840 * @wire: wire domain layout desciptor. 841 */ 842 struct ib_sig_attrs { 843 u8 check_mask; 844 struct ib_sig_domain mem; 845 struct ib_sig_domain wire; 846 }; 847 848 enum ib_sig_err_type { 849 IB_SIG_BAD_GUARD, 850 IB_SIG_BAD_REFTAG, 851 IB_SIG_BAD_APPTAG, 852 }; 853 854 /** 855 * Signature check masks (8 bytes in total) according to the T10-PI standard: 856 * -------- -------- ------------ 857 * | GUARD | APPTAG | REFTAG | 858 * | 2B | 2B | 4B | 859 * -------- -------- ------------ 860 */ 861 enum { 862 IB_SIG_CHECK_GUARD = 0xc0, 863 IB_SIG_CHECK_APPTAG = 0x30, 864 IB_SIG_CHECK_REFTAG = 0x0f, 865 }; 866 867 /** 868 * struct ib_sig_err - signature error descriptor 869 */ 870 struct ib_sig_err { 871 enum ib_sig_err_type err_type; 872 u32 expected; 873 u32 actual; 874 u64 sig_err_offset; 875 u32 key; 876 }; 877 878 enum ib_mr_status_check { 879 IB_MR_CHECK_SIG_STATUS = 1, 880 }; 881 882 /** 883 * struct ib_mr_status - Memory region status container 884 * 885 * @fail_status: Bitmask of MR checks status. For each 886 * failed check a corresponding status bit is set. 887 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS 888 * failure. 889 */ 890 struct ib_mr_status { 891 u32 fail_status; 892 struct ib_sig_err sig_err; 893 }; 894 895 /** 896 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate 897 * enum. 898 * @mult: multiple to convert. 899 */ 900 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult); 901 902 enum rdma_ah_attr_type { 903 RDMA_AH_ATTR_TYPE_UNDEFINED, 904 RDMA_AH_ATTR_TYPE_IB, 905 RDMA_AH_ATTR_TYPE_ROCE, 906 RDMA_AH_ATTR_TYPE_OPA, 907 }; 908 909 struct ib_ah_attr { 910 u16 dlid; 911 u8 src_path_bits; 912 }; 913 914 struct roce_ah_attr { 915 u8 dmac[ETH_ALEN]; 916 }; 917 918 struct opa_ah_attr { 919 u32 dlid; 920 u8 src_path_bits; 921 bool make_grd; 922 }; 923 924 struct rdma_ah_attr { 925 struct ib_global_route grh; 926 u8 sl; 927 u8 static_rate; 928 u8 port_num; 929 u8 ah_flags; 930 enum rdma_ah_attr_type type; 931 union { 932 struct ib_ah_attr ib; 933 struct roce_ah_attr roce; 934 struct opa_ah_attr opa; 935 }; 936 }; 937 938 enum ib_wc_status { 939 IB_WC_SUCCESS, 940 IB_WC_LOC_LEN_ERR, 941 IB_WC_LOC_QP_OP_ERR, 942 IB_WC_LOC_EEC_OP_ERR, 943 IB_WC_LOC_PROT_ERR, 944 IB_WC_WR_FLUSH_ERR, 945 IB_WC_MW_BIND_ERR, 946 IB_WC_BAD_RESP_ERR, 947 IB_WC_LOC_ACCESS_ERR, 948 IB_WC_REM_INV_REQ_ERR, 949 IB_WC_REM_ACCESS_ERR, 950 IB_WC_REM_OP_ERR, 951 IB_WC_RETRY_EXC_ERR, 952 IB_WC_RNR_RETRY_EXC_ERR, 953 IB_WC_LOC_RDD_VIOL_ERR, 954 IB_WC_REM_INV_RD_REQ_ERR, 955 IB_WC_REM_ABORT_ERR, 956 IB_WC_INV_EECN_ERR, 957 IB_WC_INV_EEC_STATE_ERR, 958 IB_WC_FATAL_ERR, 959 IB_WC_RESP_TIMEOUT_ERR, 960 IB_WC_GENERAL_ERR 961 }; 962 963 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status); 964 965 enum ib_wc_opcode { 966 IB_WC_SEND, 967 IB_WC_RDMA_WRITE, 968 IB_WC_RDMA_READ, 969 IB_WC_COMP_SWAP, 970 IB_WC_FETCH_ADD, 971 IB_WC_LSO, 972 IB_WC_LOCAL_INV, 973 IB_WC_REG_MR, 974 IB_WC_MASKED_COMP_SWAP, 975 IB_WC_MASKED_FETCH_ADD, 976 /* 977 * Set value of IB_WC_RECV so consumers can test if a completion is a 978 * receive by testing (opcode & IB_WC_RECV). 979 */ 980 IB_WC_RECV = 1 << 7, 981 IB_WC_RECV_RDMA_WITH_IMM 982 }; 983 984 enum ib_wc_flags { 985 IB_WC_GRH = 1, 986 IB_WC_WITH_IMM = (1<<1), 987 IB_WC_WITH_INVALIDATE = (1<<2), 988 IB_WC_IP_CSUM_OK = (1<<3), 989 IB_WC_WITH_SMAC = (1<<4), 990 IB_WC_WITH_VLAN = (1<<5), 991 IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6), 992 }; 993 994 struct ib_wc { 995 union { 996 u64 wr_id; 997 struct ib_cqe *wr_cqe; 998 }; 999 enum ib_wc_status status; 1000 enum ib_wc_opcode opcode; 1001 u32 vendor_err; 1002 u32 byte_len; 1003 struct ib_qp *qp; 1004 union { 1005 __be32 imm_data; 1006 u32 invalidate_rkey; 1007 } ex; 1008 u32 src_qp; 1009 u32 slid; 1010 int wc_flags; 1011 u16 pkey_index; 1012 u8 sl; 1013 u8 dlid_path_bits; 1014 u8 port_num; /* valid only for DR SMPs on switches */ 1015 u8 smac[ETH_ALEN]; 1016 u16 vlan_id; 1017 u8 network_hdr_type; 1018 }; 1019 1020 enum ib_cq_notify_flags { 1021 IB_CQ_SOLICITED = 1 << 0, 1022 IB_CQ_NEXT_COMP = 1 << 1, 1023 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP, 1024 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2, 1025 }; 1026 1027 enum ib_srq_type { 1028 IB_SRQT_BASIC, 1029 IB_SRQT_XRC, 1030 IB_SRQT_TM, 1031 }; 1032 1033 static inline bool ib_srq_has_cq(enum ib_srq_type srq_type) 1034 { 1035 return srq_type == IB_SRQT_XRC || 1036 srq_type == IB_SRQT_TM; 1037 } 1038 1039 enum ib_srq_attr_mask { 1040 IB_SRQ_MAX_WR = 1 << 0, 1041 IB_SRQ_LIMIT = 1 << 1, 1042 }; 1043 1044 struct ib_srq_attr { 1045 u32 max_wr; 1046 u32 max_sge; 1047 u32 srq_limit; 1048 }; 1049 1050 struct ib_srq_init_attr { 1051 void (*event_handler)(struct ib_event *, void *); 1052 void *srq_context; 1053 struct ib_srq_attr attr; 1054 enum ib_srq_type srq_type; 1055 1056 struct { 1057 struct ib_cq *cq; 1058 union { 1059 struct { 1060 struct ib_xrcd *xrcd; 1061 } xrc; 1062 1063 struct { 1064 u32 max_num_tags; 1065 } tag_matching; 1066 }; 1067 } ext; 1068 }; 1069 1070 struct ib_qp_cap { 1071 u32 max_send_wr; 1072 u32 max_recv_wr; 1073 u32 max_send_sge; 1074 u32 max_recv_sge; 1075 u32 max_inline_data; 1076 1077 /* 1078 * Maximum number of rdma_rw_ctx structures in flight at a time. 1079 * ib_create_qp() will calculate the right amount of neededed WRs 1080 * and MRs based on this. 1081 */ 1082 u32 max_rdma_ctxs; 1083 }; 1084 1085 enum ib_sig_type { 1086 IB_SIGNAL_ALL_WR, 1087 IB_SIGNAL_REQ_WR 1088 }; 1089 1090 enum ib_qp_type { 1091 /* 1092 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries 1093 * here (and in that order) since the MAD layer uses them as 1094 * indices into a 2-entry table. 1095 */ 1096 IB_QPT_SMI, 1097 IB_QPT_GSI, 1098 1099 IB_QPT_RC, 1100 IB_QPT_UC, 1101 IB_QPT_UD, 1102 IB_QPT_RAW_IPV6, 1103 IB_QPT_RAW_ETHERTYPE, 1104 IB_QPT_RAW_PACKET = 8, 1105 IB_QPT_XRC_INI = 9, 1106 IB_QPT_XRC_TGT, 1107 IB_QPT_MAX, 1108 IB_QPT_DRIVER = 0xFF, 1109 /* Reserve a range for qp types internal to the low level driver. 1110 * These qp types will not be visible at the IB core layer, so the 1111 * IB_QPT_MAX usages should not be affected in the core layer 1112 */ 1113 IB_QPT_RESERVED1 = 0x1000, 1114 IB_QPT_RESERVED2, 1115 IB_QPT_RESERVED3, 1116 IB_QPT_RESERVED4, 1117 IB_QPT_RESERVED5, 1118 IB_QPT_RESERVED6, 1119 IB_QPT_RESERVED7, 1120 IB_QPT_RESERVED8, 1121 IB_QPT_RESERVED9, 1122 IB_QPT_RESERVED10, 1123 }; 1124 1125 enum ib_qp_create_flags { 1126 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0, 1127 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1, 1128 IB_QP_CREATE_CROSS_CHANNEL = 1 << 2, 1129 IB_QP_CREATE_MANAGED_SEND = 1 << 3, 1130 IB_QP_CREATE_MANAGED_RECV = 1 << 4, 1131 IB_QP_CREATE_NETIF_QP = 1 << 5, 1132 IB_QP_CREATE_SIGNATURE_EN = 1 << 6, 1133 /* FREE = 1 << 7, */ 1134 IB_QP_CREATE_SCATTER_FCS = 1 << 8, 1135 IB_QP_CREATE_CVLAN_STRIPPING = 1 << 9, 1136 IB_QP_CREATE_SOURCE_QPN = 1 << 10, 1137 IB_QP_CREATE_PCI_WRITE_END_PADDING = 1 << 11, 1138 /* reserve bits 26-31 for low level drivers' internal use */ 1139 IB_QP_CREATE_RESERVED_START = 1 << 26, 1140 IB_QP_CREATE_RESERVED_END = 1 << 31, 1141 }; 1142 1143 /* 1144 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler 1145 * callback to destroy the passed in QP. 1146 */ 1147 1148 struct ib_qp_init_attr { 1149 /* Consumer's event_handler callback must not block */ 1150 void (*event_handler)(struct ib_event *, void *); 1151 1152 void *qp_context; 1153 struct ib_cq *send_cq; 1154 struct ib_cq *recv_cq; 1155 struct ib_srq *srq; 1156 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1157 struct ib_qp_cap cap; 1158 enum ib_sig_type sq_sig_type; 1159 enum ib_qp_type qp_type; 1160 u32 create_flags; 1161 1162 /* 1163 * Only needed for special QP types, or when using the RW API. 1164 */ 1165 u8 port_num; 1166 struct ib_rwq_ind_table *rwq_ind_tbl; 1167 u32 source_qpn; 1168 }; 1169 1170 struct ib_qp_open_attr { 1171 void (*event_handler)(struct ib_event *, void *); 1172 void *qp_context; 1173 u32 qp_num; 1174 enum ib_qp_type qp_type; 1175 }; 1176 1177 enum ib_rnr_timeout { 1178 IB_RNR_TIMER_655_36 = 0, 1179 IB_RNR_TIMER_000_01 = 1, 1180 IB_RNR_TIMER_000_02 = 2, 1181 IB_RNR_TIMER_000_03 = 3, 1182 IB_RNR_TIMER_000_04 = 4, 1183 IB_RNR_TIMER_000_06 = 5, 1184 IB_RNR_TIMER_000_08 = 6, 1185 IB_RNR_TIMER_000_12 = 7, 1186 IB_RNR_TIMER_000_16 = 8, 1187 IB_RNR_TIMER_000_24 = 9, 1188 IB_RNR_TIMER_000_32 = 10, 1189 IB_RNR_TIMER_000_48 = 11, 1190 IB_RNR_TIMER_000_64 = 12, 1191 IB_RNR_TIMER_000_96 = 13, 1192 IB_RNR_TIMER_001_28 = 14, 1193 IB_RNR_TIMER_001_92 = 15, 1194 IB_RNR_TIMER_002_56 = 16, 1195 IB_RNR_TIMER_003_84 = 17, 1196 IB_RNR_TIMER_005_12 = 18, 1197 IB_RNR_TIMER_007_68 = 19, 1198 IB_RNR_TIMER_010_24 = 20, 1199 IB_RNR_TIMER_015_36 = 21, 1200 IB_RNR_TIMER_020_48 = 22, 1201 IB_RNR_TIMER_030_72 = 23, 1202 IB_RNR_TIMER_040_96 = 24, 1203 IB_RNR_TIMER_061_44 = 25, 1204 IB_RNR_TIMER_081_92 = 26, 1205 IB_RNR_TIMER_122_88 = 27, 1206 IB_RNR_TIMER_163_84 = 28, 1207 IB_RNR_TIMER_245_76 = 29, 1208 IB_RNR_TIMER_327_68 = 30, 1209 IB_RNR_TIMER_491_52 = 31 1210 }; 1211 1212 enum ib_qp_attr_mask { 1213 IB_QP_STATE = 1, 1214 IB_QP_CUR_STATE = (1<<1), 1215 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2), 1216 IB_QP_ACCESS_FLAGS = (1<<3), 1217 IB_QP_PKEY_INDEX = (1<<4), 1218 IB_QP_PORT = (1<<5), 1219 IB_QP_QKEY = (1<<6), 1220 IB_QP_AV = (1<<7), 1221 IB_QP_PATH_MTU = (1<<8), 1222 IB_QP_TIMEOUT = (1<<9), 1223 IB_QP_RETRY_CNT = (1<<10), 1224 IB_QP_RNR_RETRY = (1<<11), 1225 IB_QP_RQ_PSN = (1<<12), 1226 IB_QP_MAX_QP_RD_ATOMIC = (1<<13), 1227 IB_QP_ALT_PATH = (1<<14), 1228 IB_QP_MIN_RNR_TIMER = (1<<15), 1229 IB_QP_SQ_PSN = (1<<16), 1230 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17), 1231 IB_QP_PATH_MIG_STATE = (1<<18), 1232 IB_QP_CAP = (1<<19), 1233 IB_QP_DEST_QPN = (1<<20), 1234 IB_QP_RESERVED1 = (1<<21), 1235 IB_QP_RESERVED2 = (1<<22), 1236 IB_QP_RESERVED3 = (1<<23), 1237 IB_QP_RESERVED4 = (1<<24), 1238 IB_QP_RATE_LIMIT = (1<<25), 1239 }; 1240 1241 enum ib_qp_state { 1242 IB_QPS_RESET, 1243 IB_QPS_INIT, 1244 IB_QPS_RTR, 1245 IB_QPS_RTS, 1246 IB_QPS_SQD, 1247 IB_QPS_SQE, 1248 IB_QPS_ERR 1249 }; 1250 1251 enum ib_mig_state { 1252 IB_MIG_MIGRATED, 1253 IB_MIG_REARM, 1254 IB_MIG_ARMED 1255 }; 1256 1257 enum ib_mw_type { 1258 IB_MW_TYPE_1 = 1, 1259 IB_MW_TYPE_2 = 2 1260 }; 1261 1262 struct ib_qp_attr { 1263 enum ib_qp_state qp_state; 1264 enum ib_qp_state cur_qp_state; 1265 enum ib_mtu path_mtu; 1266 enum ib_mig_state path_mig_state; 1267 u32 qkey; 1268 u32 rq_psn; 1269 u32 sq_psn; 1270 u32 dest_qp_num; 1271 int qp_access_flags; 1272 struct ib_qp_cap cap; 1273 struct rdma_ah_attr ah_attr; 1274 struct rdma_ah_attr alt_ah_attr; 1275 u16 pkey_index; 1276 u16 alt_pkey_index; 1277 u8 en_sqd_async_notify; 1278 u8 sq_draining; 1279 u8 max_rd_atomic; 1280 u8 max_dest_rd_atomic; 1281 u8 min_rnr_timer; 1282 u8 port_num; 1283 u8 timeout; 1284 u8 retry_cnt; 1285 u8 rnr_retry; 1286 u8 alt_port_num; 1287 u8 alt_timeout; 1288 u32 rate_limit; 1289 }; 1290 1291 enum ib_wr_opcode { 1292 /* These are shared with userspace */ 1293 IB_WR_RDMA_WRITE = IB_UVERBS_WR_RDMA_WRITE, 1294 IB_WR_RDMA_WRITE_WITH_IMM = IB_UVERBS_WR_RDMA_WRITE_WITH_IMM, 1295 IB_WR_SEND = IB_UVERBS_WR_SEND, 1296 IB_WR_SEND_WITH_IMM = IB_UVERBS_WR_SEND_WITH_IMM, 1297 IB_WR_RDMA_READ = IB_UVERBS_WR_RDMA_READ, 1298 IB_WR_ATOMIC_CMP_AND_SWP = IB_UVERBS_WR_ATOMIC_CMP_AND_SWP, 1299 IB_WR_ATOMIC_FETCH_AND_ADD = IB_UVERBS_WR_ATOMIC_FETCH_AND_ADD, 1300 IB_WR_LSO = IB_UVERBS_WR_TSO, 1301 IB_WR_SEND_WITH_INV = IB_UVERBS_WR_SEND_WITH_INV, 1302 IB_WR_RDMA_READ_WITH_INV = IB_UVERBS_WR_RDMA_READ_WITH_INV, 1303 IB_WR_LOCAL_INV = IB_UVERBS_WR_LOCAL_INV, 1304 IB_WR_MASKED_ATOMIC_CMP_AND_SWP = 1305 IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP, 1306 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD = 1307 IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD, 1308 1309 /* These are kernel only and can not be issued by userspace */ 1310 IB_WR_REG_MR = 0x20, 1311 IB_WR_REG_SIG_MR, 1312 1313 /* reserve values for low level drivers' internal use. 1314 * These values will not be used at all in the ib core layer. 1315 */ 1316 IB_WR_RESERVED1 = 0xf0, 1317 IB_WR_RESERVED2, 1318 IB_WR_RESERVED3, 1319 IB_WR_RESERVED4, 1320 IB_WR_RESERVED5, 1321 IB_WR_RESERVED6, 1322 IB_WR_RESERVED7, 1323 IB_WR_RESERVED8, 1324 IB_WR_RESERVED9, 1325 IB_WR_RESERVED10, 1326 }; 1327 1328 enum ib_send_flags { 1329 IB_SEND_FENCE = 1, 1330 IB_SEND_SIGNALED = (1<<1), 1331 IB_SEND_SOLICITED = (1<<2), 1332 IB_SEND_INLINE = (1<<3), 1333 IB_SEND_IP_CSUM = (1<<4), 1334 1335 /* reserve bits 26-31 for low level drivers' internal use */ 1336 IB_SEND_RESERVED_START = (1 << 26), 1337 IB_SEND_RESERVED_END = (1 << 31), 1338 }; 1339 1340 struct ib_sge { 1341 u64 addr; 1342 u32 length; 1343 u32 lkey; 1344 }; 1345 1346 struct ib_cqe { 1347 void (*done)(struct ib_cq *cq, struct ib_wc *wc); 1348 }; 1349 1350 struct ib_send_wr { 1351 struct ib_send_wr *next; 1352 union { 1353 u64 wr_id; 1354 struct ib_cqe *wr_cqe; 1355 }; 1356 struct ib_sge *sg_list; 1357 int num_sge; 1358 enum ib_wr_opcode opcode; 1359 int send_flags; 1360 union { 1361 __be32 imm_data; 1362 u32 invalidate_rkey; 1363 } ex; 1364 }; 1365 1366 struct ib_rdma_wr { 1367 struct ib_send_wr wr; 1368 u64 remote_addr; 1369 u32 rkey; 1370 }; 1371 1372 static inline const struct ib_rdma_wr *rdma_wr(const struct ib_send_wr *wr) 1373 { 1374 return container_of(wr, struct ib_rdma_wr, wr); 1375 } 1376 1377 struct ib_atomic_wr { 1378 struct ib_send_wr wr; 1379 u64 remote_addr; 1380 u64 compare_add; 1381 u64 swap; 1382 u64 compare_add_mask; 1383 u64 swap_mask; 1384 u32 rkey; 1385 }; 1386 1387 static inline const struct ib_atomic_wr *atomic_wr(const struct ib_send_wr *wr) 1388 { 1389 return container_of(wr, struct ib_atomic_wr, wr); 1390 } 1391 1392 struct ib_ud_wr { 1393 struct ib_send_wr wr; 1394 struct ib_ah *ah; 1395 void *header; 1396 int hlen; 1397 int mss; 1398 u32 remote_qpn; 1399 u32 remote_qkey; 1400 u16 pkey_index; /* valid for GSI only */ 1401 u8 port_num; /* valid for DR SMPs on switch only */ 1402 }; 1403 1404 static inline const struct ib_ud_wr *ud_wr(const struct ib_send_wr *wr) 1405 { 1406 return container_of(wr, struct ib_ud_wr, wr); 1407 } 1408 1409 struct ib_reg_wr { 1410 struct ib_send_wr wr; 1411 struct ib_mr *mr; 1412 u32 key; 1413 int access; 1414 }; 1415 1416 static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr) 1417 { 1418 return container_of(wr, struct ib_reg_wr, wr); 1419 } 1420 1421 struct ib_sig_handover_wr { 1422 struct ib_send_wr wr; 1423 struct ib_sig_attrs *sig_attrs; 1424 struct ib_mr *sig_mr; 1425 int access_flags; 1426 struct ib_sge *prot; 1427 }; 1428 1429 static inline const struct ib_sig_handover_wr * 1430 sig_handover_wr(const struct ib_send_wr *wr) 1431 { 1432 return container_of(wr, struct ib_sig_handover_wr, wr); 1433 } 1434 1435 struct ib_recv_wr { 1436 struct ib_recv_wr *next; 1437 union { 1438 u64 wr_id; 1439 struct ib_cqe *wr_cqe; 1440 }; 1441 struct ib_sge *sg_list; 1442 int num_sge; 1443 }; 1444 1445 enum ib_access_flags { 1446 IB_ACCESS_LOCAL_WRITE = IB_UVERBS_ACCESS_LOCAL_WRITE, 1447 IB_ACCESS_REMOTE_WRITE = IB_UVERBS_ACCESS_REMOTE_WRITE, 1448 IB_ACCESS_REMOTE_READ = IB_UVERBS_ACCESS_REMOTE_READ, 1449 IB_ACCESS_REMOTE_ATOMIC = IB_UVERBS_ACCESS_REMOTE_ATOMIC, 1450 IB_ACCESS_MW_BIND = IB_UVERBS_ACCESS_MW_BIND, 1451 IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED, 1452 IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND, 1453 IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB, 1454 1455 IB_ACCESS_SUPPORTED = ((IB_ACCESS_HUGETLB << 1) - 1) 1456 }; 1457 1458 /* 1459 * XXX: these are apparently used for ->rereg_user_mr, no idea why they 1460 * are hidden here instead of a uapi header! 1461 */ 1462 enum ib_mr_rereg_flags { 1463 IB_MR_REREG_TRANS = 1, 1464 IB_MR_REREG_PD = (1<<1), 1465 IB_MR_REREG_ACCESS = (1<<2), 1466 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1) 1467 }; 1468 1469 struct ib_fmr_attr { 1470 int max_pages; 1471 int max_maps; 1472 u8 page_shift; 1473 }; 1474 1475 struct ib_umem; 1476 1477 enum rdma_remove_reason { 1478 /* 1479 * Userspace requested uobject deletion or initial try 1480 * to remove uobject via cleanup. Call could fail 1481 */ 1482 RDMA_REMOVE_DESTROY, 1483 /* Context deletion. This call should delete the actual object itself */ 1484 RDMA_REMOVE_CLOSE, 1485 /* Driver is being hot-unplugged. This call should delete the actual object itself */ 1486 RDMA_REMOVE_DRIVER_REMOVE, 1487 /* uobj is being cleaned-up before being committed */ 1488 RDMA_REMOVE_ABORT, 1489 }; 1490 1491 struct ib_rdmacg_object { 1492 #ifdef CONFIG_CGROUP_RDMA 1493 struct rdma_cgroup *cg; /* owner rdma cgroup */ 1494 #endif 1495 }; 1496 1497 struct ib_ucontext { 1498 struct ib_device *device; 1499 struct ib_uverbs_file *ufile; 1500 /* 1501 * 'closing' can be read by the driver only during a destroy callback, 1502 * it is set when we are closing the file descriptor and indicates 1503 * that mm_sem may be locked. 1504 */ 1505 bool closing; 1506 1507 bool cleanup_retryable; 1508 1509 void (*invalidate_range)(struct ib_umem_odp *umem_odp, 1510 unsigned long start, unsigned long end); 1511 struct mutex per_mm_list_lock; 1512 struct list_head per_mm_list; 1513 1514 struct ib_rdmacg_object cg_obj; 1515 /* 1516 * Implementation details of the RDMA core, don't use in drivers: 1517 */ 1518 struct rdma_restrack_entry res; 1519 }; 1520 1521 struct ib_uobject { 1522 u64 user_handle; /* handle given to us by userspace */ 1523 /* ufile & ucontext owning this object */ 1524 struct ib_uverbs_file *ufile; 1525 /* FIXME, save memory: ufile->context == context */ 1526 struct ib_ucontext *context; /* associated user context */ 1527 void *object; /* containing object */ 1528 struct list_head list; /* link to context's list */ 1529 struct ib_rdmacg_object cg_obj; /* rdmacg object */ 1530 int id; /* index into kernel idr */ 1531 struct kref ref; 1532 atomic_t usecnt; /* protects exclusive access */ 1533 struct rcu_head rcu; /* kfree_rcu() overhead */ 1534 1535 const struct uverbs_api_object *uapi_object; 1536 }; 1537 1538 struct ib_udata { 1539 const void __user *inbuf; 1540 void __user *outbuf; 1541 size_t inlen; 1542 size_t outlen; 1543 }; 1544 1545 struct ib_pd { 1546 u32 local_dma_lkey; 1547 u32 flags; 1548 struct ib_device *device; 1549 struct ib_uobject *uobject; 1550 atomic_t usecnt; /* count all resources */ 1551 1552 u32 unsafe_global_rkey; 1553 1554 /* 1555 * Implementation details of the RDMA core, don't use in drivers: 1556 */ 1557 struct ib_mr *__internal_mr; 1558 struct rdma_restrack_entry res; 1559 }; 1560 1561 struct ib_xrcd { 1562 struct ib_device *device; 1563 atomic_t usecnt; /* count all exposed resources */ 1564 struct inode *inode; 1565 1566 struct mutex tgt_qp_mutex; 1567 struct list_head tgt_qp_list; 1568 }; 1569 1570 struct ib_ah { 1571 struct ib_device *device; 1572 struct ib_pd *pd; 1573 struct ib_uobject *uobject; 1574 const struct ib_gid_attr *sgid_attr; 1575 enum rdma_ah_attr_type type; 1576 }; 1577 1578 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context); 1579 1580 enum ib_poll_context { 1581 IB_POLL_DIRECT, /* caller context, no hw completions */ 1582 IB_POLL_SOFTIRQ, /* poll from softirq context */ 1583 IB_POLL_WORKQUEUE, /* poll from workqueue */ 1584 IB_POLL_UNBOUND_WORKQUEUE, /* poll from unbound workqueue */ 1585 }; 1586 1587 struct ib_cq { 1588 struct ib_device *device; 1589 struct ib_uobject *uobject; 1590 ib_comp_handler comp_handler; 1591 void (*event_handler)(struct ib_event *, void *); 1592 void *cq_context; 1593 int cqe; 1594 atomic_t usecnt; /* count number of work queues */ 1595 enum ib_poll_context poll_ctx; 1596 struct ib_wc *wc; 1597 union { 1598 struct irq_poll iop; 1599 struct work_struct work; 1600 }; 1601 struct workqueue_struct *comp_wq; 1602 /* 1603 * Implementation details of the RDMA core, don't use in drivers: 1604 */ 1605 struct rdma_restrack_entry res; 1606 }; 1607 1608 struct ib_srq { 1609 struct ib_device *device; 1610 struct ib_pd *pd; 1611 struct ib_uobject *uobject; 1612 void (*event_handler)(struct ib_event *, void *); 1613 void *srq_context; 1614 enum ib_srq_type srq_type; 1615 atomic_t usecnt; 1616 1617 struct { 1618 struct ib_cq *cq; 1619 union { 1620 struct { 1621 struct ib_xrcd *xrcd; 1622 u32 srq_num; 1623 } xrc; 1624 }; 1625 } ext; 1626 }; 1627 1628 enum ib_raw_packet_caps { 1629 /* Strip cvlan from incoming packet and report it in the matching work 1630 * completion is supported. 1631 */ 1632 IB_RAW_PACKET_CAP_CVLAN_STRIPPING = (1 << 0), 1633 /* Scatter FCS field of an incoming packet to host memory is supported. 1634 */ 1635 IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1), 1636 /* Checksum offloads are supported (for both send and receive). */ 1637 IB_RAW_PACKET_CAP_IP_CSUM = (1 << 2), 1638 /* When a packet is received for an RQ with no receive WQEs, the 1639 * packet processing is delayed. 1640 */ 1641 IB_RAW_PACKET_CAP_DELAY_DROP = (1 << 3), 1642 }; 1643 1644 enum ib_wq_type { 1645 IB_WQT_RQ 1646 }; 1647 1648 enum ib_wq_state { 1649 IB_WQS_RESET, 1650 IB_WQS_RDY, 1651 IB_WQS_ERR 1652 }; 1653 1654 struct ib_wq { 1655 struct ib_device *device; 1656 struct ib_uobject *uobject; 1657 void *wq_context; 1658 void (*event_handler)(struct ib_event *, void *); 1659 struct ib_pd *pd; 1660 struct ib_cq *cq; 1661 u32 wq_num; 1662 enum ib_wq_state state; 1663 enum ib_wq_type wq_type; 1664 atomic_t usecnt; 1665 }; 1666 1667 enum ib_wq_flags { 1668 IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0, 1669 IB_WQ_FLAGS_SCATTER_FCS = 1 << 1, 1670 IB_WQ_FLAGS_DELAY_DROP = 1 << 2, 1671 IB_WQ_FLAGS_PCI_WRITE_END_PADDING = 1 << 3, 1672 }; 1673 1674 struct ib_wq_init_attr { 1675 void *wq_context; 1676 enum ib_wq_type wq_type; 1677 u32 max_wr; 1678 u32 max_sge; 1679 struct ib_cq *cq; 1680 void (*event_handler)(struct ib_event *, void *); 1681 u32 create_flags; /* Use enum ib_wq_flags */ 1682 }; 1683 1684 enum ib_wq_attr_mask { 1685 IB_WQ_STATE = 1 << 0, 1686 IB_WQ_CUR_STATE = 1 << 1, 1687 IB_WQ_FLAGS = 1 << 2, 1688 }; 1689 1690 struct ib_wq_attr { 1691 enum ib_wq_state wq_state; 1692 enum ib_wq_state curr_wq_state; 1693 u32 flags; /* Use enum ib_wq_flags */ 1694 u32 flags_mask; /* Use enum ib_wq_flags */ 1695 }; 1696 1697 struct ib_rwq_ind_table { 1698 struct ib_device *device; 1699 struct ib_uobject *uobject; 1700 atomic_t usecnt; 1701 u32 ind_tbl_num; 1702 u32 log_ind_tbl_size; 1703 struct ib_wq **ind_tbl; 1704 }; 1705 1706 struct ib_rwq_ind_table_init_attr { 1707 u32 log_ind_tbl_size; 1708 /* Each entry is a pointer to Receive Work Queue */ 1709 struct ib_wq **ind_tbl; 1710 }; 1711 1712 enum port_pkey_state { 1713 IB_PORT_PKEY_NOT_VALID = 0, 1714 IB_PORT_PKEY_VALID = 1, 1715 IB_PORT_PKEY_LISTED = 2, 1716 }; 1717 1718 struct ib_qp_security; 1719 1720 struct ib_port_pkey { 1721 enum port_pkey_state state; 1722 u16 pkey_index; 1723 u8 port_num; 1724 struct list_head qp_list; 1725 struct list_head to_error_list; 1726 struct ib_qp_security *sec; 1727 }; 1728 1729 struct ib_ports_pkeys { 1730 struct ib_port_pkey main; 1731 struct ib_port_pkey alt; 1732 }; 1733 1734 struct ib_qp_security { 1735 struct ib_qp *qp; 1736 struct ib_device *dev; 1737 /* Hold this mutex when changing port and pkey settings. */ 1738 struct mutex mutex; 1739 struct ib_ports_pkeys *ports_pkeys; 1740 /* A list of all open shared QP handles. Required to enforce security 1741 * properly for all users of a shared QP. 1742 */ 1743 struct list_head shared_qp_list; 1744 void *security; 1745 bool destroying; 1746 atomic_t error_list_count; 1747 struct completion error_complete; 1748 int error_comps_pending; 1749 }; 1750 1751 /* 1752 * @max_write_sge: Maximum SGE elements per RDMA WRITE request. 1753 * @max_read_sge: Maximum SGE elements per RDMA READ request. 1754 */ 1755 struct ib_qp { 1756 struct ib_device *device; 1757 struct ib_pd *pd; 1758 struct ib_cq *send_cq; 1759 struct ib_cq *recv_cq; 1760 spinlock_t mr_lock; 1761 int mrs_used; 1762 struct list_head rdma_mrs; 1763 struct list_head sig_mrs; 1764 struct ib_srq *srq; 1765 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1766 struct list_head xrcd_list; 1767 1768 /* count times opened, mcast attaches, flow attaches */ 1769 atomic_t usecnt; 1770 struct list_head open_list; 1771 struct ib_qp *real_qp; 1772 struct ib_uobject *uobject; 1773 void (*event_handler)(struct ib_event *, void *); 1774 void *qp_context; 1775 /* sgid_attrs associated with the AV's */ 1776 const struct ib_gid_attr *av_sgid_attr; 1777 const struct ib_gid_attr *alt_path_sgid_attr; 1778 u32 qp_num; 1779 u32 max_write_sge; 1780 u32 max_read_sge; 1781 enum ib_qp_type qp_type; 1782 struct ib_rwq_ind_table *rwq_ind_tbl; 1783 struct ib_qp_security *qp_sec; 1784 u8 port; 1785 1786 /* 1787 * Implementation details of the RDMA core, don't use in drivers: 1788 */ 1789 struct rdma_restrack_entry res; 1790 }; 1791 1792 struct ib_dm { 1793 struct ib_device *device; 1794 u32 length; 1795 u32 flags; 1796 struct ib_uobject *uobject; 1797 atomic_t usecnt; 1798 }; 1799 1800 struct ib_mr { 1801 struct ib_device *device; 1802 struct ib_pd *pd; 1803 u32 lkey; 1804 u32 rkey; 1805 u64 iova; 1806 u64 length; 1807 unsigned int page_size; 1808 bool need_inval; 1809 union { 1810 struct ib_uobject *uobject; /* user */ 1811 struct list_head qp_entry; /* FR */ 1812 }; 1813 1814 struct ib_dm *dm; 1815 1816 /* 1817 * Implementation details of the RDMA core, don't use in drivers: 1818 */ 1819 struct rdma_restrack_entry res; 1820 }; 1821 1822 struct ib_mw { 1823 struct ib_device *device; 1824 struct ib_pd *pd; 1825 struct ib_uobject *uobject; 1826 u32 rkey; 1827 enum ib_mw_type type; 1828 }; 1829 1830 struct ib_fmr { 1831 struct ib_device *device; 1832 struct ib_pd *pd; 1833 struct list_head list; 1834 u32 lkey; 1835 u32 rkey; 1836 }; 1837 1838 /* Supported steering options */ 1839 enum ib_flow_attr_type { 1840 /* steering according to rule specifications */ 1841 IB_FLOW_ATTR_NORMAL = 0x0, 1842 /* default unicast and multicast rule - 1843 * receive all Eth traffic which isn't steered to any QP 1844 */ 1845 IB_FLOW_ATTR_ALL_DEFAULT = 0x1, 1846 /* default multicast rule - 1847 * receive all Eth multicast traffic which isn't steered to any QP 1848 */ 1849 IB_FLOW_ATTR_MC_DEFAULT = 0x2, 1850 /* sniffer rule - receive all port traffic */ 1851 IB_FLOW_ATTR_SNIFFER = 0x3 1852 }; 1853 1854 /* Supported steering header types */ 1855 enum ib_flow_spec_type { 1856 /* L2 headers*/ 1857 IB_FLOW_SPEC_ETH = 0x20, 1858 IB_FLOW_SPEC_IB = 0x22, 1859 /* L3 header*/ 1860 IB_FLOW_SPEC_IPV4 = 0x30, 1861 IB_FLOW_SPEC_IPV6 = 0x31, 1862 IB_FLOW_SPEC_ESP = 0x34, 1863 /* L4 headers*/ 1864 IB_FLOW_SPEC_TCP = 0x40, 1865 IB_FLOW_SPEC_UDP = 0x41, 1866 IB_FLOW_SPEC_VXLAN_TUNNEL = 0x50, 1867 IB_FLOW_SPEC_GRE = 0x51, 1868 IB_FLOW_SPEC_MPLS = 0x60, 1869 IB_FLOW_SPEC_INNER = 0x100, 1870 /* Actions */ 1871 IB_FLOW_SPEC_ACTION_TAG = 0x1000, 1872 IB_FLOW_SPEC_ACTION_DROP = 0x1001, 1873 IB_FLOW_SPEC_ACTION_HANDLE = 0x1002, 1874 IB_FLOW_SPEC_ACTION_COUNT = 0x1003, 1875 }; 1876 #define IB_FLOW_SPEC_LAYER_MASK 0xF0 1877 #define IB_FLOW_SPEC_SUPPORT_LAYERS 10 1878 1879 /* Flow steering rule priority is set according to it's domain. 1880 * Lower domain value means higher priority. 1881 */ 1882 enum ib_flow_domain { 1883 IB_FLOW_DOMAIN_USER, 1884 IB_FLOW_DOMAIN_ETHTOOL, 1885 IB_FLOW_DOMAIN_RFS, 1886 IB_FLOW_DOMAIN_NIC, 1887 IB_FLOW_DOMAIN_NUM /* Must be last */ 1888 }; 1889 1890 enum ib_flow_flags { 1891 IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */ 1892 IB_FLOW_ATTR_FLAGS_EGRESS = 1UL << 2, /* Egress flow */ 1893 IB_FLOW_ATTR_FLAGS_RESERVED = 1UL << 3 /* Must be last */ 1894 }; 1895 1896 struct ib_flow_eth_filter { 1897 u8 dst_mac[6]; 1898 u8 src_mac[6]; 1899 __be16 ether_type; 1900 __be16 vlan_tag; 1901 /* Must be last */ 1902 u8 real_sz[0]; 1903 }; 1904 1905 struct ib_flow_spec_eth { 1906 u32 type; 1907 u16 size; 1908 struct ib_flow_eth_filter val; 1909 struct ib_flow_eth_filter mask; 1910 }; 1911 1912 struct ib_flow_ib_filter { 1913 __be16 dlid; 1914 __u8 sl; 1915 /* Must be last */ 1916 u8 real_sz[0]; 1917 }; 1918 1919 struct ib_flow_spec_ib { 1920 u32 type; 1921 u16 size; 1922 struct ib_flow_ib_filter val; 1923 struct ib_flow_ib_filter mask; 1924 }; 1925 1926 /* IPv4 header flags */ 1927 enum ib_ipv4_flags { 1928 IB_IPV4_DONT_FRAG = 0x2, /* Don't enable packet fragmentation */ 1929 IB_IPV4_MORE_FRAG = 0X4 /* For All fragmented packets except the 1930 last have this flag set */ 1931 }; 1932 1933 struct ib_flow_ipv4_filter { 1934 __be32 src_ip; 1935 __be32 dst_ip; 1936 u8 proto; 1937 u8 tos; 1938 u8 ttl; 1939 u8 flags; 1940 /* Must be last */ 1941 u8 real_sz[0]; 1942 }; 1943 1944 struct ib_flow_spec_ipv4 { 1945 u32 type; 1946 u16 size; 1947 struct ib_flow_ipv4_filter val; 1948 struct ib_flow_ipv4_filter mask; 1949 }; 1950 1951 struct ib_flow_ipv6_filter { 1952 u8 src_ip[16]; 1953 u8 dst_ip[16]; 1954 __be32 flow_label; 1955 u8 next_hdr; 1956 u8 traffic_class; 1957 u8 hop_limit; 1958 /* Must be last */ 1959 u8 real_sz[0]; 1960 }; 1961 1962 struct ib_flow_spec_ipv6 { 1963 u32 type; 1964 u16 size; 1965 struct ib_flow_ipv6_filter val; 1966 struct ib_flow_ipv6_filter mask; 1967 }; 1968 1969 struct ib_flow_tcp_udp_filter { 1970 __be16 dst_port; 1971 __be16 src_port; 1972 /* Must be last */ 1973 u8 real_sz[0]; 1974 }; 1975 1976 struct ib_flow_spec_tcp_udp { 1977 u32 type; 1978 u16 size; 1979 struct ib_flow_tcp_udp_filter val; 1980 struct ib_flow_tcp_udp_filter mask; 1981 }; 1982 1983 struct ib_flow_tunnel_filter { 1984 __be32 tunnel_id; 1985 u8 real_sz[0]; 1986 }; 1987 1988 /* ib_flow_spec_tunnel describes the Vxlan tunnel 1989 * the tunnel_id from val has the vni value 1990 */ 1991 struct ib_flow_spec_tunnel { 1992 u32 type; 1993 u16 size; 1994 struct ib_flow_tunnel_filter val; 1995 struct ib_flow_tunnel_filter mask; 1996 }; 1997 1998 struct ib_flow_esp_filter { 1999 __be32 spi; 2000 __be32 seq; 2001 /* Must be last */ 2002 u8 real_sz[0]; 2003 }; 2004 2005 struct ib_flow_spec_esp { 2006 u32 type; 2007 u16 size; 2008 struct ib_flow_esp_filter val; 2009 struct ib_flow_esp_filter mask; 2010 }; 2011 2012 struct ib_flow_gre_filter { 2013 __be16 c_ks_res0_ver; 2014 __be16 protocol; 2015 __be32 key; 2016 /* Must be last */ 2017 u8 real_sz[0]; 2018 }; 2019 2020 struct ib_flow_spec_gre { 2021 u32 type; 2022 u16 size; 2023 struct ib_flow_gre_filter val; 2024 struct ib_flow_gre_filter mask; 2025 }; 2026 2027 struct ib_flow_mpls_filter { 2028 __be32 tag; 2029 /* Must be last */ 2030 u8 real_sz[0]; 2031 }; 2032 2033 struct ib_flow_spec_mpls { 2034 u32 type; 2035 u16 size; 2036 struct ib_flow_mpls_filter val; 2037 struct ib_flow_mpls_filter mask; 2038 }; 2039 2040 struct ib_flow_spec_action_tag { 2041 enum ib_flow_spec_type type; 2042 u16 size; 2043 u32 tag_id; 2044 }; 2045 2046 struct ib_flow_spec_action_drop { 2047 enum ib_flow_spec_type type; 2048 u16 size; 2049 }; 2050 2051 struct ib_flow_spec_action_handle { 2052 enum ib_flow_spec_type type; 2053 u16 size; 2054 struct ib_flow_action *act; 2055 }; 2056 2057 enum ib_counters_description { 2058 IB_COUNTER_PACKETS, 2059 IB_COUNTER_BYTES, 2060 }; 2061 2062 struct ib_flow_spec_action_count { 2063 enum ib_flow_spec_type type; 2064 u16 size; 2065 struct ib_counters *counters; 2066 }; 2067 2068 union ib_flow_spec { 2069 struct { 2070 u32 type; 2071 u16 size; 2072 }; 2073 struct ib_flow_spec_eth eth; 2074 struct ib_flow_spec_ib ib; 2075 struct ib_flow_spec_ipv4 ipv4; 2076 struct ib_flow_spec_tcp_udp tcp_udp; 2077 struct ib_flow_spec_ipv6 ipv6; 2078 struct ib_flow_spec_tunnel tunnel; 2079 struct ib_flow_spec_esp esp; 2080 struct ib_flow_spec_gre gre; 2081 struct ib_flow_spec_mpls mpls; 2082 struct ib_flow_spec_action_tag flow_tag; 2083 struct ib_flow_spec_action_drop drop; 2084 struct ib_flow_spec_action_handle action; 2085 struct ib_flow_spec_action_count flow_count; 2086 }; 2087 2088 struct ib_flow_attr { 2089 enum ib_flow_attr_type type; 2090 u16 size; 2091 u16 priority; 2092 u32 flags; 2093 u8 num_of_specs; 2094 u8 port; 2095 union ib_flow_spec flows[]; 2096 }; 2097 2098 struct ib_flow { 2099 struct ib_qp *qp; 2100 struct ib_device *device; 2101 struct ib_uobject *uobject; 2102 }; 2103 2104 enum ib_flow_action_type { 2105 IB_FLOW_ACTION_UNSPECIFIED, 2106 IB_FLOW_ACTION_ESP = 1, 2107 }; 2108 2109 struct ib_flow_action_attrs_esp_keymats { 2110 enum ib_uverbs_flow_action_esp_keymat protocol; 2111 union { 2112 struct ib_uverbs_flow_action_esp_keymat_aes_gcm aes_gcm; 2113 } keymat; 2114 }; 2115 2116 struct ib_flow_action_attrs_esp_replays { 2117 enum ib_uverbs_flow_action_esp_replay protocol; 2118 union { 2119 struct ib_uverbs_flow_action_esp_replay_bmp bmp; 2120 } replay; 2121 }; 2122 2123 enum ib_flow_action_attrs_esp_flags { 2124 /* All user-space flags at the top: Use enum ib_uverbs_flow_action_esp_flags 2125 * This is done in order to share the same flags between user-space and 2126 * kernel and spare an unnecessary translation. 2127 */ 2128 2129 /* Kernel flags */ 2130 IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED = 1ULL << 32, 2131 IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS = 1ULL << 33, 2132 }; 2133 2134 struct ib_flow_spec_list { 2135 struct ib_flow_spec_list *next; 2136 union ib_flow_spec spec; 2137 }; 2138 2139 struct ib_flow_action_attrs_esp { 2140 struct ib_flow_action_attrs_esp_keymats *keymat; 2141 struct ib_flow_action_attrs_esp_replays *replay; 2142 struct ib_flow_spec_list *encap; 2143 /* Used only if IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED is enabled. 2144 * Value of 0 is a valid value. 2145 */ 2146 u32 esn; 2147 u32 spi; 2148 u32 seq; 2149 u32 tfc_pad; 2150 /* Use enum ib_flow_action_attrs_esp_flags */ 2151 u64 flags; 2152 u64 hard_limit_pkts; 2153 }; 2154 2155 struct ib_flow_action { 2156 struct ib_device *device; 2157 struct ib_uobject *uobject; 2158 enum ib_flow_action_type type; 2159 atomic_t usecnt; 2160 }; 2161 2162 struct ib_mad_hdr; 2163 struct ib_grh; 2164 2165 enum ib_process_mad_flags { 2166 IB_MAD_IGNORE_MKEY = 1, 2167 IB_MAD_IGNORE_BKEY = 2, 2168 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY 2169 }; 2170 2171 enum ib_mad_result { 2172 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */ 2173 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */ 2174 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */ 2175 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */ 2176 }; 2177 2178 struct ib_port_cache { 2179 u64 subnet_prefix; 2180 struct ib_pkey_cache *pkey; 2181 struct ib_gid_table *gid; 2182 u8 lmc; 2183 enum ib_port_state port_state; 2184 }; 2185 2186 struct ib_cache { 2187 rwlock_t lock; 2188 struct ib_event_handler event_handler; 2189 struct ib_port_cache *ports; 2190 }; 2191 2192 struct iw_cm_verbs; 2193 2194 struct ib_port_immutable { 2195 int pkey_tbl_len; 2196 int gid_tbl_len; 2197 u32 core_cap_flags; 2198 u32 max_mad_size; 2199 }; 2200 2201 /* rdma netdev type - specifies protocol type */ 2202 enum rdma_netdev_t { 2203 RDMA_NETDEV_OPA_VNIC, 2204 RDMA_NETDEV_IPOIB, 2205 }; 2206 2207 /** 2208 * struct rdma_netdev - rdma netdev 2209 * For cases where netstack interfacing is required. 2210 */ 2211 struct rdma_netdev { 2212 void *clnt_priv; 2213 struct ib_device *hca; 2214 u8 port_num; 2215 2216 /* 2217 * cleanup function must be specified. 2218 * FIXME: This is only used for OPA_VNIC and that usage should be 2219 * removed too. 2220 */ 2221 void (*free_rdma_netdev)(struct net_device *netdev); 2222 2223 /* control functions */ 2224 void (*set_id)(struct net_device *netdev, int id); 2225 /* send packet */ 2226 int (*send)(struct net_device *dev, struct sk_buff *skb, 2227 struct ib_ah *address, u32 dqpn); 2228 /* multicast */ 2229 int (*attach_mcast)(struct net_device *dev, struct ib_device *hca, 2230 union ib_gid *gid, u16 mlid, 2231 int set_qkey, u32 qkey); 2232 int (*detach_mcast)(struct net_device *dev, struct ib_device *hca, 2233 union ib_gid *gid, u16 mlid); 2234 }; 2235 2236 struct rdma_netdev_alloc_params { 2237 size_t sizeof_priv; 2238 unsigned int txqs; 2239 unsigned int rxqs; 2240 void *param; 2241 2242 int (*initialize_rdma_netdev)(struct ib_device *device, u8 port_num, 2243 struct net_device *netdev, void *param); 2244 }; 2245 2246 struct ib_port_pkey_list { 2247 /* Lock to hold while modifying the list. */ 2248 spinlock_t list_lock; 2249 struct list_head pkey_list; 2250 }; 2251 2252 struct ib_counters { 2253 struct ib_device *device; 2254 struct ib_uobject *uobject; 2255 /* num of objects attached */ 2256 atomic_t usecnt; 2257 }; 2258 2259 struct ib_counters_read_attr { 2260 u64 *counters_buff; 2261 u32 ncounters; 2262 u32 flags; /* use enum ib_read_counters_flags */ 2263 }; 2264 2265 struct uverbs_attr_bundle; 2266 2267 /** 2268 * struct ib_device_ops - InfiniBand device operations 2269 * This structure defines all the InfiniBand device operations, providers will 2270 * need to define the supported operations, otherwise they will be set to null. 2271 */ 2272 struct ib_device_ops { 2273 int (*post_send)(struct ib_qp *qp, const struct ib_send_wr *send_wr, 2274 const struct ib_send_wr **bad_send_wr); 2275 int (*post_recv)(struct ib_qp *qp, const struct ib_recv_wr *recv_wr, 2276 const struct ib_recv_wr **bad_recv_wr); 2277 void (*drain_rq)(struct ib_qp *qp); 2278 void (*drain_sq)(struct ib_qp *qp); 2279 int (*poll_cq)(struct ib_cq *cq, int num_entries, struct ib_wc *wc); 2280 int (*peek_cq)(struct ib_cq *cq, int wc_cnt); 2281 int (*req_notify_cq)(struct ib_cq *cq, enum ib_cq_notify_flags flags); 2282 int (*req_ncomp_notif)(struct ib_cq *cq, int wc_cnt); 2283 int (*post_srq_recv)(struct ib_srq *srq, 2284 const struct ib_recv_wr *recv_wr, 2285 const struct ib_recv_wr **bad_recv_wr); 2286 int (*process_mad)(struct ib_device *device, int process_mad_flags, 2287 u8 port_num, const struct ib_wc *in_wc, 2288 const struct ib_grh *in_grh, 2289 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 2290 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 2291 u16 *out_mad_pkey_index); 2292 int (*query_device)(struct ib_device *device, 2293 struct ib_device_attr *device_attr, 2294 struct ib_udata *udata); 2295 int (*modify_device)(struct ib_device *device, int device_modify_mask, 2296 struct ib_device_modify *device_modify); 2297 void (*get_dev_fw_str)(struct ib_device *device, char *str); 2298 const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev, 2299 int comp_vector); 2300 int (*query_port)(struct ib_device *device, u8 port_num, 2301 struct ib_port_attr *port_attr); 2302 int (*modify_port)(struct ib_device *device, u8 port_num, 2303 int port_modify_mask, 2304 struct ib_port_modify *port_modify); 2305 /** 2306 * The following mandatory functions are used only at device 2307 * registration. Keep functions such as these at the end of this 2308 * structure to avoid cache line misses when accessing struct ib_device 2309 * in fast paths. 2310 */ 2311 int (*get_port_immutable)(struct ib_device *device, u8 port_num, 2312 struct ib_port_immutable *immutable); 2313 enum rdma_link_layer (*get_link_layer)(struct ib_device *device, 2314 u8 port_num); 2315 /** 2316 * When calling get_netdev, the HW vendor's driver should return the 2317 * net device of device @device at port @port_num or NULL if such 2318 * a net device doesn't exist. The vendor driver should call dev_hold 2319 * on this net device. The HW vendor's device driver must guarantee 2320 * that this function returns NULL before the net device has finished 2321 * NETDEV_UNREGISTER state. 2322 */ 2323 struct net_device *(*get_netdev)(struct ib_device *device, u8 port_num); 2324 /** 2325 * rdma netdev operation 2326 * 2327 * Driver implementing alloc_rdma_netdev or rdma_netdev_get_params 2328 * must return -EOPNOTSUPP if it doesn't support the specified type. 2329 */ 2330 struct net_device *(*alloc_rdma_netdev)( 2331 struct ib_device *device, u8 port_num, enum rdma_netdev_t type, 2332 const char *name, unsigned char name_assign_type, 2333 void (*setup)(struct net_device *)); 2334 2335 int (*rdma_netdev_get_params)(struct ib_device *device, u8 port_num, 2336 enum rdma_netdev_t type, 2337 struct rdma_netdev_alloc_params *params); 2338 /** 2339 * query_gid should be return GID value for @device, when @port_num 2340 * link layer is either IB or iWarp. It is no-op if @port_num port 2341 * is RoCE link layer. 2342 */ 2343 int (*query_gid)(struct ib_device *device, u8 port_num, int index, 2344 union ib_gid *gid); 2345 /** 2346 * When calling add_gid, the HW vendor's driver should add the gid 2347 * of device of port at gid index available at @attr. Meta-info of 2348 * that gid (for example, the network device related to this gid) is 2349 * available at @attr. @context allows the HW vendor driver to store 2350 * extra information together with a GID entry. The HW vendor driver may 2351 * allocate memory to contain this information and store it in @context 2352 * when a new GID entry is written to. Params are consistent until the 2353 * next call of add_gid or delete_gid. The function should return 0 on 2354 * success or error otherwise. The function could be called 2355 * concurrently for different ports. This function is only called when 2356 * roce_gid_table is used. 2357 */ 2358 int (*add_gid)(const struct ib_gid_attr *attr, void **context); 2359 /** 2360 * When calling del_gid, the HW vendor's driver should delete the 2361 * gid of device @device at gid index gid_index of port port_num 2362 * available in @attr. 2363 * Upon the deletion of a GID entry, the HW vendor must free any 2364 * allocated memory. The caller will clear @context afterwards. 2365 * This function is only called when roce_gid_table is used. 2366 */ 2367 int (*del_gid)(const struct ib_gid_attr *attr, void **context); 2368 int (*query_pkey)(struct ib_device *device, u8 port_num, u16 index, 2369 u16 *pkey); 2370 struct ib_ucontext *(*alloc_ucontext)(struct ib_device *device, 2371 struct ib_udata *udata); 2372 int (*dealloc_ucontext)(struct ib_ucontext *context); 2373 int (*mmap)(struct ib_ucontext *context, struct vm_area_struct *vma); 2374 void (*disassociate_ucontext)(struct ib_ucontext *ibcontext); 2375 struct ib_pd *(*alloc_pd)(struct ib_device *device, 2376 struct ib_ucontext *context, 2377 struct ib_udata *udata); 2378 int (*dealloc_pd)(struct ib_pd *pd); 2379 struct ib_ah *(*create_ah)(struct ib_pd *pd, 2380 struct rdma_ah_attr *ah_attr, u32 flags, 2381 struct ib_udata *udata); 2382 int (*modify_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 2383 int (*query_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 2384 int (*destroy_ah)(struct ib_ah *ah, u32 flags); 2385 struct ib_srq *(*create_srq)(struct ib_pd *pd, 2386 struct ib_srq_init_attr *srq_init_attr, 2387 struct ib_udata *udata); 2388 int (*modify_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr, 2389 enum ib_srq_attr_mask srq_attr_mask, 2390 struct ib_udata *udata); 2391 int (*query_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr); 2392 int (*destroy_srq)(struct ib_srq *srq); 2393 struct ib_qp *(*create_qp)(struct ib_pd *pd, 2394 struct ib_qp_init_attr *qp_init_attr, 2395 struct ib_udata *udata); 2396 int (*modify_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 2397 int qp_attr_mask, struct ib_udata *udata); 2398 int (*query_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 2399 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr); 2400 int (*destroy_qp)(struct ib_qp *qp); 2401 struct ib_cq *(*create_cq)(struct ib_device *device, 2402 const struct ib_cq_init_attr *attr, 2403 struct ib_ucontext *context, 2404 struct ib_udata *udata); 2405 int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period); 2406 int (*destroy_cq)(struct ib_cq *cq); 2407 int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata); 2408 struct ib_mr *(*get_dma_mr)(struct ib_pd *pd, int mr_access_flags); 2409 struct ib_mr *(*reg_user_mr)(struct ib_pd *pd, u64 start, u64 length, 2410 u64 virt_addr, int mr_access_flags, 2411 struct ib_udata *udata); 2412 int (*rereg_user_mr)(struct ib_mr *mr, int flags, u64 start, u64 length, 2413 u64 virt_addr, int mr_access_flags, 2414 struct ib_pd *pd, struct ib_udata *udata); 2415 int (*dereg_mr)(struct ib_mr *mr); 2416 struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type, 2417 u32 max_num_sg); 2418 int (*advise_mr)(struct ib_pd *pd, 2419 enum ib_uverbs_advise_mr_advice advice, u32 flags, 2420 struct ib_sge *sg_list, u32 num_sge, 2421 struct uverbs_attr_bundle *attrs); 2422 int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2423 unsigned int *sg_offset); 2424 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask, 2425 struct ib_mr_status *mr_status); 2426 struct ib_mw *(*alloc_mw)(struct ib_pd *pd, enum ib_mw_type type, 2427 struct ib_udata *udata); 2428 int (*dealloc_mw)(struct ib_mw *mw); 2429 struct ib_fmr *(*alloc_fmr)(struct ib_pd *pd, int mr_access_flags, 2430 struct ib_fmr_attr *fmr_attr); 2431 int (*map_phys_fmr)(struct ib_fmr *fmr, u64 *page_list, int list_len, 2432 u64 iova); 2433 int (*unmap_fmr)(struct list_head *fmr_list); 2434 int (*dealloc_fmr)(struct ib_fmr *fmr); 2435 int (*attach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid); 2436 int (*detach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid); 2437 struct ib_xrcd *(*alloc_xrcd)(struct ib_device *device, 2438 struct ib_ucontext *ucontext, 2439 struct ib_udata *udata); 2440 int (*dealloc_xrcd)(struct ib_xrcd *xrcd); 2441 struct ib_flow *(*create_flow)(struct ib_qp *qp, 2442 struct ib_flow_attr *flow_attr, 2443 int domain, struct ib_udata *udata); 2444 int (*destroy_flow)(struct ib_flow *flow_id); 2445 struct ib_flow_action *(*create_flow_action_esp)( 2446 struct ib_device *device, 2447 const struct ib_flow_action_attrs_esp *attr, 2448 struct uverbs_attr_bundle *attrs); 2449 int (*destroy_flow_action)(struct ib_flow_action *action); 2450 int (*modify_flow_action_esp)( 2451 struct ib_flow_action *action, 2452 const struct ib_flow_action_attrs_esp *attr, 2453 struct uverbs_attr_bundle *attrs); 2454 int (*set_vf_link_state)(struct ib_device *device, int vf, u8 port, 2455 int state); 2456 int (*get_vf_config)(struct ib_device *device, int vf, u8 port, 2457 struct ifla_vf_info *ivf); 2458 int (*get_vf_stats)(struct ib_device *device, int vf, u8 port, 2459 struct ifla_vf_stats *stats); 2460 int (*set_vf_guid)(struct ib_device *device, int vf, u8 port, u64 guid, 2461 int type); 2462 struct ib_wq *(*create_wq)(struct ib_pd *pd, 2463 struct ib_wq_init_attr *init_attr, 2464 struct ib_udata *udata); 2465 int (*destroy_wq)(struct ib_wq *wq); 2466 int (*modify_wq)(struct ib_wq *wq, struct ib_wq_attr *attr, 2467 u32 wq_attr_mask, struct ib_udata *udata); 2468 struct ib_rwq_ind_table *(*create_rwq_ind_table)( 2469 struct ib_device *device, 2470 struct ib_rwq_ind_table_init_attr *init_attr, 2471 struct ib_udata *udata); 2472 int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table); 2473 struct ib_dm *(*alloc_dm)(struct ib_device *device, 2474 struct ib_ucontext *context, 2475 struct ib_dm_alloc_attr *attr, 2476 struct uverbs_attr_bundle *attrs); 2477 int (*dealloc_dm)(struct ib_dm *dm); 2478 struct ib_mr *(*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm, 2479 struct ib_dm_mr_attr *attr, 2480 struct uverbs_attr_bundle *attrs); 2481 struct ib_counters *(*create_counters)( 2482 struct ib_device *device, struct uverbs_attr_bundle *attrs); 2483 int (*destroy_counters)(struct ib_counters *counters); 2484 int (*read_counters)(struct ib_counters *counters, 2485 struct ib_counters_read_attr *counters_read_attr, 2486 struct uverbs_attr_bundle *attrs); 2487 /** 2488 * alloc_hw_stats - Allocate a struct rdma_hw_stats and fill in the 2489 * driver initialized data. The struct is kfree()'ed by the sysfs 2490 * core when the device is removed. A lifespan of -1 in the return 2491 * struct tells the core to set a default lifespan. 2492 */ 2493 struct rdma_hw_stats *(*alloc_hw_stats)(struct ib_device *device, 2494 u8 port_num); 2495 /** 2496 * get_hw_stats - Fill in the counter value(s) in the stats struct. 2497 * @index - The index in the value array we wish to have updated, or 2498 * num_counters if we want all stats updated 2499 * Return codes - 2500 * < 0 - Error, no counters updated 2501 * index - Updated the single counter pointed to by index 2502 * num_counters - Updated all counters (will reset the timestamp 2503 * and prevent further calls for lifespan milliseconds) 2504 * Drivers are allowed to update all counters in leiu of just the 2505 * one given in index at their option 2506 */ 2507 int (*get_hw_stats)(struct ib_device *device, 2508 struct rdma_hw_stats *stats, u8 port, int index); 2509 /* 2510 * This function is called once for each port when a ib device is 2511 * registered. 2512 */ 2513 int (*init_port)(struct ib_device *device, u8 port_num, 2514 struct kobject *port_sysfs); 2515 /** 2516 * Allows rdma drivers to add their own restrack attributes. 2517 */ 2518 int (*fill_res_entry)(struct sk_buff *msg, 2519 struct rdma_restrack_entry *entry); 2520 }; 2521 2522 struct ib_device { 2523 /* Do not access @dma_device directly from ULP nor from HW drivers. */ 2524 struct device *dma_device; 2525 struct ib_device_ops ops; 2526 char name[IB_DEVICE_NAME_MAX]; 2527 2528 struct list_head event_handler_list; 2529 spinlock_t event_handler_lock; 2530 2531 rwlock_t client_data_lock; 2532 struct list_head core_list; 2533 /* Access to the client_data_list is protected by the client_data_lock 2534 * rwlock and the lists_rwsem read-write semaphore 2535 */ 2536 struct list_head client_data_list; 2537 2538 struct ib_cache cache; 2539 /** 2540 * port_immutable is indexed by port number 2541 */ 2542 struct ib_port_immutable *port_immutable; 2543 2544 int num_comp_vectors; 2545 2546 struct ib_port_pkey_list *port_pkey_list; 2547 2548 struct iw_cm_verbs *iwcm; 2549 2550 struct module *owner; 2551 struct device dev; 2552 /* First group for device attributes, 2553 * Second group for driver provided attributes (optional). 2554 * It is NULL terminated array. 2555 */ 2556 const struct attribute_group *groups[3]; 2557 2558 struct kobject *ports_kobj; 2559 struct list_head port_list; 2560 2561 enum { 2562 IB_DEV_UNINITIALIZED, 2563 IB_DEV_REGISTERED, 2564 IB_DEV_UNREGISTERED 2565 } reg_state; 2566 2567 int uverbs_abi_ver; 2568 u64 uverbs_cmd_mask; 2569 u64 uverbs_ex_cmd_mask; 2570 2571 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 2572 __be64 node_guid; 2573 u32 local_dma_lkey; 2574 u16 is_switch:1; 2575 /* Indicates kernel verbs support, should not be used in drivers */ 2576 u16 kverbs_provider:1; 2577 u8 node_type; 2578 u8 phys_port_cnt; 2579 struct ib_device_attr attrs; 2580 struct attribute_group *hw_stats_ag; 2581 struct rdma_hw_stats *hw_stats; 2582 2583 #ifdef CONFIG_CGROUP_RDMA 2584 struct rdmacg_device cg_device; 2585 #endif 2586 2587 u32 index; 2588 /* 2589 * Implementation details of the RDMA core, don't use in drivers 2590 */ 2591 struct rdma_restrack_root res; 2592 2593 const struct uapi_definition *driver_def; 2594 enum rdma_driver_id driver_id; 2595 2596 /* 2597 * Positive refcount indicates that the device is currently 2598 * registered and cannot be unregistered. 2599 */ 2600 refcount_t refcount; 2601 struct completion unreg_completion; 2602 }; 2603 2604 struct ib_client { 2605 char *name; 2606 void (*add) (struct ib_device *); 2607 void (*remove)(struct ib_device *, void *client_data); 2608 2609 /* Returns the net_dev belonging to this ib_client and matching the 2610 * given parameters. 2611 * @dev: An RDMA device that the net_dev use for communication. 2612 * @port: A physical port number on the RDMA device. 2613 * @pkey: P_Key that the net_dev uses if applicable. 2614 * @gid: A GID that the net_dev uses to communicate. 2615 * @addr: An IP address the net_dev is configured with. 2616 * @client_data: The device's client data set by ib_set_client_data(). 2617 * 2618 * An ib_client that implements a net_dev on top of RDMA devices 2619 * (such as IP over IB) should implement this callback, allowing the 2620 * rdma_cm module to find the right net_dev for a given request. 2621 * 2622 * The caller is responsible for calling dev_put on the returned 2623 * netdev. */ 2624 struct net_device *(*get_net_dev_by_params)( 2625 struct ib_device *dev, 2626 u8 port, 2627 u16 pkey, 2628 const union ib_gid *gid, 2629 const struct sockaddr *addr, 2630 void *client_data); 2631 struct list_head list; 2632 2633 /* kverbs are not required by the client */ 2634 u8 no_kverbs_req:1; 2635 }; 2636 2637 struct ib_device *_ib_alloc_device(size_t size); 2638 #define ib_alloc_device(drv_struct, member) \ 2639 container_of(_ib_alloc_device(sizeof(struct drv_struct) + \ 2640 BUILD_BUG_ON_ZERO(offsetof( \ 2641 struct drv_struct, member))), \ 2642 struct drv_struct, member) 2643 2644 void ib_dealloc_device(struct ib_device *device); 2645 2646 void ib_get_device_fw_str(struct ib_device *device, char *str); 2647 2648 int ib_register_device(struct ib_device *device, const char *name); 2649 void ib_unregister_device(struct ib_device *device); 2650 2651 int ib_register_client (struct ib_client *client); 2652 void ib_unregister_client(struct ib_client *client); 2653 2654 void *ib_get_client_data(struct ib_device *device, struct ib_client *client); 2655 void ib_set_client_data(struct ib_device *device, struct ib_client *client, 2656 void *data); 2657 void ib_set_device_ops(struct ib_device *device, 2658 const struct ib_device_ops *ops); 2659 2660 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) 2661 int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma, 2662 unsigned long pfn, unsigned long size, pgprot_t prot); 2663 int rdma_user_mmap_page(struct ib_ucontext *ucontext, 2664 struct vm_area_struct *vma, struct page *page, 2665 unsigned long size); 2666 #else 2667 static inline int rdma_user_mmap_io(struct ib_ucontext *ucontext, 2668 struct vm_area_struct *vma, 2669 unsigned long pfn, unsigned long size, 2670 pgprot_t prot) 2671 { 2672 return -EINVAL; 2673 } 2674 static inline int rdma_user_mmap_page(struct ib_ucontext *ucontext, 2675 struct vm_area_struct *vma, struct page *page, 2676 unsigned long size) 2677 { 2678 return -EINVAL; 2679 } 2680 #endif 2681 2682 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len) 2683 { 2684 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0; 2685 } 2686 2687 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len) 2688 { 2689 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0; 2690 } 2691 2692 static inline bool ib_is_buffer_cleared(const void __user *p, 2693 size_t len) 2694 { 2695 bool ret; 2696 u8 *buf; 2697 2698 if (len > USHRT_MAX) 2699 return false; 2700 2701 buf = memdup_user(p, len); 2702 if (IS_ERR(buf)) 2703 return false; 2704 2705 ret = !memchr_inv(buf, 0, len); 2706 kfree(buf); 2707 return ret; 2708 } 2709 2710 static inline bool ib_is_udata_cleared(struct ib_udata *udata, 2711 size_t offset, 2712 size_t len) 2713 { 2714 return ib_is_buffer_cleared(udata->inbuf + offset, len); 2715 } 2716 2717 /** 2718 * ib_is_destroy_retryable - Check whether the uobject destruction 2719 * is retryable. 2720 * @ret: The initial destruction return code 2721 * @why: remove reason 2722 * @uobj: The uobject that is destroyed 2723 * 2724 * This function is a helper function that IB layer and low-level drivers 2725 * can use to consider whether the destruction of the given uobject is 2726 * retry-able. 2727 * It checks the original return code, if it wasn't success the destruction 2728 * is retryable according to the ucontext state (i.e. cleanup_retryable) and 2729 * the remove reason. (i.e. why). 2730 * Must be called with the object locked for destroy. 2731 */ 2732 static inline bool ib_is_destroy_retryable(int ret, enum rdma_remove_reason why, 2733 struct ib_uobject *uobj) 2734 { 2735 return ret && (why == RDMA_REMOVE_DESTROY || 2736 uobj->context->cleanup_retryable); 2737 } 2738 2739 /** 2740 * ib_destroy_usecnt - Called during destruction to check the usecnt 2741 * @usecnt: The usecnt atomic 2742 * @why: remove reason 2743 * @uobj: The uobject that is destroyed 2744 * 2745 * Non-zero usecnts will block destruction unless destruction was triggered by 2746 * a ucontext cleanup. 2747 */ 2748 static inline int ib_destroy_usecnt(atomic_t *usecnt, 2749 enum rdma_remove_reason why, 2750 struct ib_uobject *uobj) 2751 { 2752 if (atomic_read(usecnt) && ib_is_destroy_retryable(-EBUSY, why, uobj)) 2753 return -EBUSY; 2754 return 0; 2755 } 2756 2757 /** 2758 * ib_modify_qp_is_ok - Check that the supplied attribute mask 2759 * contains all required attributes and no attributes not allowed for 2760 * the given QP state transition. 2761 * @cur_state: Current QP state 2762 * @next_state: Next QP state 2763 * @type: QP type 2764 * @mask: Mask of supplied QP attributes 2765 * 2766 * This function is a helper function that a low-level driver's 2767 * modify_qp method can use to validate the consumer's input. It 2768 * checks that cur_state and next_state are valid QP states, that a 2769 * transition from cur_state to next_state is allowed by the IB spec, 2770 * and that the attribute mask supplied is allowed for the transition. 2771 */ 2772 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 2773 enum ib_qp_type type, enum ib_qp_attr_mask mask); 2774 2775 void ib_register_event_handler(struct ib_event_handler *event_handler); 2776 void ib_unregister_event_handler(struct ib_event_handler *event_handler); 2777 void ib_dispatch_event(struct ib_event *event); 2778 2779 int ib_query_port(struct ib_device *device, 2780 u8 port_num, struct ib_port_attr *port_attr); 2781 2782 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, 2783 u8 port_num); 2784 2785 /** 2786 * rdma_cap_ib_switch - Check if the device is IB switch 2787 * @device: Device to check 2788 * 2789 * Device driver is responsible for setting is_switch bit on 2790 * in ib_device structure at init time. 2791 * 2792 * Return: true if the device is IB switch. 2793 */ 2794 static inline bool rdma_cap_ib_switch(const struct ib_device *device) 2795 { 2796 return device->is_switch; 2797 } 2798 2799 /** 2800 * rdma_start_port - Return the first valid port number for the device 2801 * specified 2802 * 2803 * @device: Device to be checked 2804 * 2805 * Return start port number 2806 */ 2807 static inline u8 rdma_start_port(const struct ib_device *device) 2808 { 2809 return rdma_cap_ib_switch(device) ? 0 : 1; 2810 } 2811 2812 /** 2813 * rdma_end_port - Return the last valid port number for the device 2814 * specified 2815 * 2816 * @device: Device to be checked 2817 * 2818 * Return last port number 2819 */ 2820 static inline u8 rdma_end_port(const struct ib_device *device) 2821 { 2822 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt; 2823 } 2824 2825 static inline int rdma_is_port_valid(const struct ib_device *device, 2826 unsigned int port) 2827 { 2828 return (port >= rdma_start_port(device) && 2829 port <= rdma_end_port(device)); 2830 } 2831 2832 static inline bool rdma_is_grh_required(const struct ib_device *device, 2833 u8 port_num) 2834 { 2835 return device->port_immutable[port_num].core_cap_flags & 2836 RDMA_CORE_PORT_IB_GRH_REQUIRED; 2837 } 2838 2839 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num) 2840 { 2841 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB; 2842 } 2843 2844 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num) 2845 { 2846 return device->port_immutable[port_num].core_cap_flags & 2847 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP); 2848 } 2849 2850 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device, u8 port_num) 2851 { 2852 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 2853 } 2854 2855 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device, u8 port_num) 2856 { 2857 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE; 2858 } 2859 2860 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num) 2861 { 2862 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP; 2863 } 2864 2865 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num) 2866 { 2867 return rdma_protocol_ib(device, port_num) || 2868 rdma_protocol_roce(device, port_num); 2869 } 2870 2871 static inline bool rdma_protocol_raw_packet(const struct ib_device *device, u8 port_num) 2872 { 2873 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_RAW_PACKET; 2874 } 2875 2876 static inline bool rdma_protocol_usnic(const struct ib_device *device, u8 port_num) 2877 { 2878 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_USNIC; 2879 } 2880 2881 /** 2882 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband 2883 * Management Datagrams. 2884 * @device: Device to check 2885 * @port_num: Port number to check 2886 * 2887 * Management Datagrams (MAD) are a required part of the InfiniBand 2888 * specification and are supported on all InfiniBand devices. A slightly 2889 * extended version are also supported on OPA interfaces. 2890 * 2891 * Return: true if the port supports sending/receiving of MAD packets. 2892 */ 2893 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num) 2894 { 2895 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_MAD; 2896 } 2897 2898 /** 2899 * rdma_cap_opa_mad - Check if the port of device provides support for OPA 2900 * Management Datagrams. 2901 * @device: Device to check 2902 * @port_num: Port number to check 2903 * 2904 * Intel OmniPath devices extend and/or replace the InfiniBand Management 2905 * datagrams with their own versions. These OPA MADs share many but not all of 2906 * the characteristics of InfiniBand MADs. 2907 * 2908 * OPA MADs differ in the following ways: 2909 * 2910 * 1) MADs are variable size up to 2K 2911 * IBTA defined MADs remain fixed at 256 bytes 2912 * 2) OPA SMPs must carry valid PKeys 2913 * 3) OPA SMP packets are a different format 2914 * 2915 * Return: true if the port supports OPA MAD packet formats. 2916 */ 2917 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num) 2918 { 2919 return (device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_OPA_MAD) 2920 == RDMA_CORE_CAP_OPA_MAD; 2921 } 2922 2923 /** 2924 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband 2925 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI). 2926 * @device: Device to check 2927 * @port_num: Port number to check 2928 * 2929 * Each InfiniBand node is required to provide a Subnet Management Agent 2930 * that the subnet manager can access. Prior to the fabric being fully 2931 * configured by the subnet manager, the SMA is accessed via a well known 2932 * interface called the Subnet Management Interface (SMI). This interface 2933 * uses directed route packets to communicate with the SM to get around the 2934 * chicken and egg problem of the SM needing to know what's on the fabric 2935 * in order to configure the fabric, and needing to configure the fabric in 2936 * order to send packets to the devices on the fabric. These directed 2937 * route packets do not need the fabric fully configured in order to reach 2938 * their destination. The SMI is the only method allowed to send 2939 * directed route packets on an InfiniBand fabric. 2940 * 2941 * Return: true if the port provides an SMI. 2942 */ 2943 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num) 2944 { 2945 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SMI; 2946 } 2947 2948 /** 2949 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband 2950 * Communication Manager. 2951 * @device: Device to check 2952 * @port_num: Port number to check 2953 * 2954 * The InfiniBand Communication Manager is one of many pre-defined General 2955 * Service Agents (GSA) that are accessed via the General Service 2956 * Interface (GSI). It's role is to facilitate establishment of connections 2957 * between nodes as well as other management related tasks for established 2958 * connections. 2959 * 2960 * Return: true if the port supports an IB CM (this does not guarantee that 2961 * a CM is actually running however). 2962 */ 2963 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num) 2964 { 2965 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_CM; 2966 } 2967 2968 /** 2969 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP 2970 * Communication Manager. 2971 * @device: Device to check 2972 * @port_num: Port number to check 2973 * 2974 * Similar to above, but specific to iWARP connections which have a different 2975 * managment protocol than InfiniBand. 2976 * 2977 * Return: true if the port supports an iWARP CM (this does not guarantee that 2978 * a CM is actually running however). 2979 */ 2980 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num) 2981 { 2982 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IW_CM; 2983 } 2984 2985 /** 2986 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband 2987 * Subnet Administration. 2988 * @device: Device to check 2989 * @port_num: Port number to check 2990 * 2991 * An InfiniBand Subnet Administration (SA) service is a pre-defined General 2992 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand 2993 * fabrics, devices should resolve routes to other hosts by contacting the 2994 * SA to query the proper route. 2995 * 2996 * Return: true if the port should act as a client to the fabric Subnet 2997 * Administration interface. This does not imply that the SA service is 2998 * running locally. 2999 */ 3000 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num) 3001 { 3002 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SA; 3003 } 3004 3005 /** 3006 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband 3007 * Multicast. 3008 * @device: Device to check 3009 * @port_num: Port number to check 3010 * 3011 * InfiniBand multicast registration is more complex than normal IPv4 or 3012 * IPv6 multicast registration. Each Host Channel Adapter must register 3013 * with the Subnet Manager when it wishes to join a multicast group. It 3014 * should do so only once regardless of how many queue pairs it subscribes 3015 * to this group. And it should leave the group only after all queue pairs 3016 * attached to the group have been detached. 3017 * 3018 * Return: true if the port must undertake the additional adminstrative 3019 * overhead of registering/unregistering with the SM and tracking of the 3020 * total number of queue pairs attached to the multicast group. 3021 */ 3022 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num) 3023 { 3024 return rdma_cap_ib_sa(device, port_num); 3025 } 3026 3027 /** 3028 * rdma_cap_af_ib - Check if the port of device has the capability 3029 * Native Infiniband Address. 3030 * @device: Device to check 3031 * @port_num: Port number to check 3032 * 3033 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default 3034 * GID. RoCE uses a different mechanism, but still generates a GID via 3035 * a prescribed mechanism and port specific data. 3036 * 3037 * Return: true if the port uses a GID address to identify devices on the 3038 * network. 3039 */ 3040 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num) 3041 { 3042 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_AF_IB; 3043 } 3044 3045 /** 3046 * rdma_cap_eth_ah - Check if the port of device has the capability 3047 * Ethernet Address Handle. 3048 * @device: Device to check 3049 * @port_num: Port number to check 3050 * 3051 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique 3052 * to fabricate GIDs over Ethernet/IP specific addresses native to the 3053 * port. Normally, packet headers are generated by the sending host 3054 * adapter, but when sending connectionless datagrams, we must manually 3055 * inject the proper headers for the fabric we are communicating over. 3056 * 3057 * Return: true if we are running as a RoCE port and must force the 3058 * addition of a Global Route Header built from our Ethernet Address 3059 * Handle into our header list for connectionless packets. 3060 */ 3061 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num) 3062 { 3063 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH; 3064 } 3065 3066 /** 3067 * rdma_cap_opa_ah - Check if the port of device supports 3068 * OPA Address handles 3069 * @device: Device to check 3070 * @port_num: Port number to check 3071 * 3072 * Return: true if we are running on an OPA device which supports 3073 * the extended OPA addressing. 3074 */ 3075 static inline bool rdma_cap_opa_ah(struct ib_device *device, u8 port_num) 3076 { 3077 return (device->port_immutable[port_num].core_cap_flags & 3078 RDMA_CORE_CAP_OPA_AH) == RDMA_CORE_CAP_OPA_AH; 3079 } 3080 3081 /** 3082 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port. 3083 * 3084 * @device: Device 3085 * @port_num: Port number 3086 * 3087 * This MAD size includes the MAD headers and MAD payload. No other headers 3088 * are included. 3089 * 3090 * Return the max MAD size required by the Port. Will return 0 if the port 3091 * does not support MADs 3092 */ 3093 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num) 3094 { 3095 return device->port_immutable[port_num].max_mad_size; 3096 } 3097 3098 /** 3099 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table 3100 * @device: Device to check 3101 * @port_num: Port number to check 3102 * 3103 * RoCE GID table mechanism manages the various GIDs for a device. 3104 * 3105 * NOTE: if allocating the port's GID table has failed, this call will still 3106 * return true, but any RoCE GID table API will fail. 3107 * 3108 * Return: true if the port uses RoCE GID table mechanism in order to manage 3109 * its GIDs. 3110 */ 3111 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device, 3112 u8 port_num) 3113 { 3114 return rdma_protocol_roce(device, port_num) && 3115 device->ops.add_gid && device->ops.del_gid; 3116 } 3117 3118 /* 3119 * Check if the device supports READ W/ INVALIDATE. 3120 */ 3121 static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num) 3122 { 3123 /* 3124 * iWarp drivers must support READ W/ INVALIDATE. No other protocol 3125 * has support for it yet. 3126 */ 3127 return rdma_protocol_iwarp(dev, port_num); 3128 } 3129 3130 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 3131 int state); 3132 int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 3133 struct ifla_vf_info *info); 3134 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 3135 struct ifla_vf_stats *stats); 3136 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 3137 int type); 3138 3139 int ib_query_pkey(struct ib_device *device, 3140 u8 port_num, u16 index, u16 *pkey); 3141 3142 int ib_modify_device(struct ib_device *device, 3143 int device_modify_mask, 3144 struct ib_device_modify *device_modify); 3145 3146 int ib_modify_port(struct ib_device *device, 3147 u8 port_num, int port_modify_mask, 3148 struct ib_port_modify *port_modify); 3149 3150 int ib_find_gid(struct ib_device *device, union ib_gid *gid, 3151 u8 *port_num, u16 *index); 3152 3153 int ib_find_pkey(struct ib_device *device, 3154 u8 port_num, u16 pkey, u16 *index); 3155 3156 enum ib_pd_flags { 3157 /* 3158 * Create a memory registration for all memory in the system and place 3159 * the rkey for it into pd->unsafe_global_rkey. This can be used by 3160 * ULPs to avoid the overhead of dynamic MRs. 3161 * 3162 * This flag is generally considered unsafe and must only be used in 3163 * extremly trusted environments. Every use of it will log a warning 3164 * in the kernel log. 3165 */ 3166 IB_PD_UNSAFE_GLOBAL_RKEY = 0x01, 3167 }; 3168 3169 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 3170 const char *caller); 3171 #define ib_alloc_pd(device, flags) \ 3172 __ib_alloc_pd((device), (flags), KBUILD_MODNAME) 3173 void ib_dealloc_pd(struct ib_pd *pd); 3174 3175 enum rdma_create_ah_flags { 3176 /* In a sleepable context */ 3177 RDMA_CREATE_AH_SLEEPABLE = BIT(0), 3178 }; 3179 3180 /** 3181 * rdma_create_ah - Creates an address handle for the given address vector. 3182 * @pd: The protection domain associated with the address handle. 3183 * @ah_attr: The attributes of the address vector. 3184 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 3185 * 3186 * The address handle is used to reference a local or global destination 3187 * in all UD QP post sends. 3188 */ 3189 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, 3190 u32 flags); 3191 3192 /** 3193 * rdma_create_user_ah - Creates an address handle for the given address vector. 3194 * It resolves destination mac address for ah attribute of RoCE type. 3195 * @pd: The protection domain associated with the address handle. 3196 * @ah_attr: The attributes of the address vector. 3197 * @udata: pointer to user's input output buffer information need by 3198 * provider driver. 3199 * 3200 * It returns 0 on success and returns appropriate error code on error. 3201 * The address handle is used to reference a local or global destination 3202 * in all UD QP post sends. 3203 */ 3204 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 3205 struct rdma_ah_attr *ah_attr, 3206 struct ib_udata *udata); 3207 /** 3208 * ib_get_gids_from_rdma_hdr - Get sgid and dgid from GRH or IPv4 header 3209 * work completion. 3210 * @hdr: the L3 header to parse 3211 * @net_type: type of header to parse 3212 * @sgid: place to store source gid 3213 * @dgid: place to store destination gid 3214 */ 3215 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 3216 enum rdma_network_type net_type, 3217 union ib_gid *sgid, union ib_gid *dgid); 3218 3219 /** 3220 * ib_get_rdma_header_version - Get the header version 3221 * @hdr: the L3 header to parse 3222 */ 3223 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr); 3224 3225 /** 3226 * ib_init_ah_attr_from_wc - Initializes address handle attributes from a 3227 * work completion. 3228 * @device: Device on which the received message arrived. 3229 * @port_num: Port on which the received message arrived. 3230 * @wc: Work completion associated with the received message. 3231 * @grh: References the received global route header. This parameter is 3232 * ignored unless the work completion indicates that the GRH is valid. 3233 * @ah_attr: Returned attributes that can be used when creating an address 3234 * handle for replying to the message. 3235 * When ib_init_ah_attr_from_wc() returns success, 3236 * (a) for IB link layer it optionally contains a reference to SGID attribute 3237 * when GRH is present for IB link layer. 3238 * (b) for RoCE link layer it contains a reference to SGID attribute. 3239 * User must invoke rdma_cleanup_ah_attr_gid_attr() to release reference to SGID 3240 * attributes which are initialized using ib_init_ah_attr_from_wc(). 3241 * 3242 */ 3243 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num, 3244 const struct ib_wc *wc, const struct ib_grh *grh, 3245 struct rdma_ah_attr *ah_attr); 3246 3247 /** 3248 * ib_create_ah_from_wc - Creates an address handle associated with the 3249 * sender of the specified work completion. 3250 * @pd: The protection domain associated with the address handle. 3251 * @wc: Work completion information associated with a received message. 3252 * @grh: References the received global route header. This parameter is 3253 * ignored unless the work completion indicates that the GRH is valid. 3254 * @port_num: The outbound port number to associate with the address. 3255 * 3256 * The address handle is used to reference a local or global destination 3257 * in all UD QP post sends. 3258 */ 3259 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 3260 const struct ib_grh *grh, u8 port_num); 3261 3262 /** 3263 * rdma_modify_ah - Modifies the address vector associated with an address 3264 * handle. 3265 * @ah: The address handle to modify. 3266 * @ah_attr: The new address vector attributes to associate with the 3267 * address handle. 3268 */ 3269 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3270 3271 /** 3272 * rdma_query_ah - Queries the address vector associated with an address 3273 * handle. 3274 * @ah: The address handle to query. 3275 * @ah_attr: The address vector attributes associated with the address 3276 * handle. 3277 */ 3278 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3279 3280 enum rdma_destroy_ah_flags { 3281 /* In a sleepable context */ 3282 RDMA_DESTROY_AH_SLEEPABLE = BIT(0), 3283 }; 3284 3285 /** 3286 * rdma_destroy_ah - Destroys an address handle. 3287 * @ah: The address handle to destroy. 3288 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags). 3289 */ 3290 int rdma_destroy_ah(struct ib_ah *ah, u32 flags); 3291 3292 /** 3293 * ib_create_srq - Creates a SRQ associated with the specified protection 3294 * domain. 3295 * @pd: The protection domain associated with the SRQ. 3296 * @srq_init_attr: A list of initial attributes required to create the 3297 * SRQ. If SRQ creation succeeds, then the attributes are updated to 3298 * the actual capabilities of the created SRQ. 3299 * 3300 * srq_attr->max_wr and srq_attr->max_sge are read the determine the 3301 * requested size of the SRQ, and set to the actual values allocated 3302 * on return. If ib_create_srq() succeeds, then max_wr and max_sge 3303 * will always be at least as large as the requested values. 3304 */ 3305 struct ib_srq *ib_create_srq(struct ib_pd *pd, 3306 struct ib_srq_init_attr *srq_init_attr); 3307 3308 /** 3309 * ib_modify_srq - Modifies the attributes for the specified SRQ. 3310 * @srq: The SRQ to modify. 3311 * @srq_attr: On input, specifies the SRQ attributes to modify. On output, 3312 * the current values of selected SRQ attributes are returned. 3313 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ 3314 * are being modified. 3315 * 3316 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or 3317 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when 3318 * the number of receives queued drops below the limit. 3319 */ 3320 int ib_modify_srq(struct ib_srq *srq, 3321 struct ib_srq_attr *srq_attr, 3322 enum ib_srq_attr_mask srq_attr_mask); 3323 3324 /** 3325 * ib_query_srq - Returns the attribute list and current values for the 3326 * specified SRQ. 3327 * @srq: The SRQ to query. 3328 * @srq_attr: The attributes of the specified SRQ. 3329 */ 3330 int ib_query_srq(struct ib_srq *srq, 3331 struct ib_srq_attr *srq_attr); 3332 3333 /** 3334 * ib_destroy_srq - Destroys the specified SRQ. 3335 * @srq: The SRQ to destroy. 3336 */ 3337 int ib_destroy_srq(struct ib_srq *srq); 3338 3339 /** 3340 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ. 3341 * @srq: The SRQ to post the work request on. 3342 * @recv_wr: A list of work requests to post on the receive queue. 3343 * @bad_recv_wr: On an immediate failure, this parameter will reference 3344 * the work request that failed to be posted on the QP. 3345 */ 3346 static inline int ib_post_srq_recv(struct ib_srq *srq, 3347 const struct ib_recv_wr *recv_wr, 3348 const struct ib_recv_wr **bad_recv_wr) 3349 { 3350 const struct ib_recv_wr *dummy; 3351 3352 return srq->device->ops.post_srq_recv(srq, recv_wr, 3353 bad_recv_wr ? : &dummy); 3354 } 3355 3356 /** 3357 * ib_create_qp - Creates a QP associated with the specified protection 3358 * domain. 3359 * @pd: The protection domain associated with the QP. 3360 * @qp_init_attr: A list of initial attributes required to create the 3361 * QP. If QP creation succeeds, then the attributes are updated to 3362 * the actual capabilities of the created QP. 3363 */ 3364 struct ib_qp *ib_create_qp(struct ib_pd *pd, 3365 struct ib_qp_init_attr *qp_init_attr); 3366 3367 /** 3368 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 3369 * @qp: The QP to modify. 3370 * @attr: On input, specifies the QP attributes to modify. On output, 3371 * the current values of selected QP attributes are returned. 3372 * @attr_mask: A bit-mask used to specify which attributes of the QP 3373 * are being modified. 3374 * @udata: pointer to user's input output buffer information 3375 * are being modified. 3376 * It returns 0 on success and returns appropriate error code on error. 3377 */ 3378 int ib_modify_qp_with_udata(struct ib_qp *qp, 3379 struct ib_qp_attr *attr, 3380 int attr_mask, 3381 struct ib_udata *udata); 3382 3383 /** 3384 * ib_modify_qp - Modifies the attributes for the specified QP and then 3385 * transitions the QP to the given state. 3386 * @qp: The QP to modify. 3387 * @qp_attr: On input, specifies the QP attributes to modify. On output, 3388 * the current values of selected QP attributes are returned. 3389 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP 3390 * are being modified. 3391 */ 3392 int ib_modify_qp(struct ib_qp *qp, 3393 struct ib_qp_attr *qp_attr, 3394 int qp_attr_mask); 3395 3396 /** 3397 * ib_query_qp - Returns the attribute list and current values for the 3398 * specified QP. 3399 * @qp: The QP to query. 3400 * @qp_attr: The attributes of the specified QP. 3401 * @qp_attr_mask: A bit-mask used to select specific attributes to query. 3402 * @qp_init_attr: Additional attributes of the selected QP. 3403 * 3404 * The qp_attr_mask may be used to limit the query to gathering only the 3405 * selected attributes. 3406 */ 3407 int ib_query_qp(struct ib_qp *qp, 3408 struct ib_qp_attr *qp_attr, 3409 int qp_attr_mask, 3410 struct ib_qp_init_attr *qp_init_attr); 3411 3412 /** 3413 * ib_destroy_qp - Destroys the specified QP. 3414 * @qp: The QP to destroy. 3415 */ 3416 int ib_destroy_qp(struct ib_qp *qp); 3417 3418 /** 3419 * ib_open_qp - Obtain a reference to an existing sharable QP. 3420 * @xrcd - XRC domain 3421 * @qp_open_attr: Attributes identifying the QP to open. 3422 * 3423 * Returns a reference to a sharable QP. 3424 */ 3425 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 3426 struct ib_qp_open_attr *qp_open_attr); 3427 3428 /** 3429 * ib_close_qp - Release an external reference to a QP. 3430 * @qp: The QP handle to release 3431 * 3432 * The opened QP handle is released by the caller. The underlying 3433 * shared QP is not destroyed until all internal references are released. 3434 */ 3435 int ib_close_qp(struct ib_qp *qp); 3436 3437 /** 3438 * ib_post_send - Posts a list of work requests to the send queue of 3439 * the specified QP. 3440 * @qp: The QP to post the work request on. 3441 * @send_wr: A list of work requests to post on the send queue. 3442 * @bad_send_wr: On an immediate failure, this parameter will reference 3443 * the work request that failed to be posted on the QP. 3444 * 3445 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate 3446 * error is returned, the QP state shall not be affected, 3447 * ib_post_send() will return an immediate error after queueing any 3448 * earlier work requests in the list. 3449 */ 3450 static inline int ib_post_send(struct ib_qp *qp, 3451 const struct ib_send_wr *send_wr, 3452 const struct ib_send_wr **bad_send_wr) 3453 { 3454 const struct ib_send_wr *dummy; 3455 3456 return qp->device->ops.post_send(qp, send_wr, bad_send_wr ? : &dummy); 3457 } 3458 3459 /** 3460 * ib_post_recv - Posts a list of work requests to the receive queue of 3461 * the specified QP. 3462 * @qp: The QP to post the work request on. 3463 * @recv_wr: A list of work requests to post on the receive queue. 3464 * @bad_recv_wr: On an immediate failure, this parameter will reference 3465 * the work request that failed to be posted on the QP. 3466 */ 3467 static inline int ib_post_recv(struct ib_qp *qp, 3468 const struct ib_recv_wr *recv_wr, 3469 const struct ib_recv_wr **bad_recv_wr) 3470 { 3471 const struct ib_recv_wr *dummy; 3472 3473 return qp->device->ops.post_recv(qp, recv_wr, bad_recv_wr ? : &dummy); 3474 } 3475 3476 struct ib_cq *__ib_alloc_cq(struct ib_device *dev, void *private, 3477 int nr_cqe, int comp_vector, 3478 enum ib_poll_context poll_ctx, const char *caller); 3479 #define ib_alloc_cq(device, priv, nr_cqe, comp_vect, poll_ctx) \ 3480 __ib_alloc_cq((device), (priv), (nr_cqe), (comp_vect), (poll_ctx), KBUILD_MODNAME) 3481 3482 void ib_free_cq(struct ib_cq *cq); 3483 int ib_process_cq_direct(struct ib_cq *cq, int budget); 3484 3485 /** 3486 * ib_create_cq - Creates a CQ on the specified device. 3487 * @device: The device on which to create the CQ. 3488 * @comp_handler: A user-specified callback that is invoked when a 3489 * completion event occurs on the CQ. 3490 * @event_handler: A user-specified callback that is invoked when an 3491 * asynchronous event not associated with a completion occurs on the CQ. 3492 * @cq_context: Context associated with the CQ returned to the user via 3493 * the associated completion and event handlers. 3494 * @cq_attr: The attributes the CQ should be created upon. 3495 * 3496 * Users can examine the cq structure to determine the actual CQ size. 3497 */ 3498 struct ib_cq *__ib_create_cq(struct ib_device *device, 3499 ib_comp_handler comp_handler, 3500 void (*event_handler)(struct ib_event *, void *), 3501 void *cq_context, 3502 const struct ib_cq_init_attr *cq_attr, 3503 const char *caller); 3504 #define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \ 3505 __ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), KBUILD_MODNAME) 3506 3507 /** 3508 * ib_resize_cq - Modifies the capacity of the CQ. 3509 * @cq: The CQ to resize. 3510 * @cqe: The minimum size of the CQ. 3511 * 3512 * Users can examine the cq structure to determine the actual CQ size. 3513 */ 3514 int ib_resize_cq(struct ib_cq *cq, int cqe); 3515 3516 /** 3517 * rdma_set_cq_moderation - Modifies moderation params of the CQ 3518 * @cq: The CQ to modify. 3519 * @cq_count: number of CQEs that will trigger an event 3520 * @cq_period: max period of time in usec before triggering an event 3521 * 3522 */ 3523 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period); 3524 3525 /** 3526 * ib_destroy_cq - Destroys the specified CQ. 3527 * @cq: The CQ to destroy. 3528 */ 3529 int ib_destroy_cq(struct ib_cq *cq); 3530 3531 /** 3532 * ib_poll_cq - poll a CQ for completion(s) 3533 * @cq:the CQ being polled 3534 * @num_entries:maximum number of completions to return 3535 * @wc:array of at least @num_entries &struct ib_wc where completions 3536 * will be returned 3537 * 3538 * Poll a CQ for (possibly multiple) completions. If the return value 3539 * is < 0, an error occurred. If the return value is >= 0, it is the 3540 * number of completions returned. If the return value is 3541 * non-negative and < num_entries, then the CQ was emptied. 3542 */ 3543 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries, 3544 struct ib_wc *wc) 3545 { 3546 return cq->device->ops.poll_cq(cq, num_entries, wc); 3547 } 3548 3549 /** 3550 * ib_req_notify_cq - Request completion notification on a CQ. 3551 * @cq: The CQ to generate an event for. 3552 * @flags: 3553 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP 3554 * to request an event on the next solicited event or next work 3555 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS 3556 * may also be |ed in to request a hint about missed events, as 3557 * described below. 3558 * 3559 * Return Value: 3560 * < 0 means an error occurred while requesting notification 3561 * == 0 means notification was requested successfully, and if 3562 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events 3563 * were missed and it is safe to wait for another event. In 3564 * this case is it guaranteed that any work completions added 3565 * to the CQ since the last CQ poll will trigger a completion 3566 * notification event. 3567 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed 3568 * in. It means that the consumer must poll the CQ again to 3569 * make sure it is empty to avoid missing an event because of a 3570 * race between requesting notification and an entry being 3571 * added to the CQ. This return value means it is possible 3572 * (but not guaranteed) that a work completion has been added 3573 * to the CQ since the last poll without triggering a 3574 * completion notification event. 3575 */ 3576 static inline int ib_req_notify_cq(struct ib_cq *cq, 3577 enum ib_cq_notify_flags flags) 3578 { 3579 return cq->device->ops.req_notify_cq(cq, flags); 3580 } 3581 3582 /** 3583 * ib_req_ncomp_notif - Request completion notification when there are 3584 * at least the specified number of unreaped completions on the CQ. 3585 * @cq: The CQ to generate an event for. 3586 * @wc_cnt: The number of unreaped completions that should be on the 3587 * CQ before an event is generated. 3588 */ 3589 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt) 3590 { 3591 return cq->device->ops.req_ncomp_notif ? 3592 cq->device->ops.req_ncomp_notif(cq, wc_cnt) : 3593 -ENOSYS; 3594 } 3595 3596 /** 3597 * ib_dma_mapping_error - check a DMA addr for error 3598 * @dev: The device for which the dma_addr was created 3599 * @dma_addr: The DMA address to check 3600 */ 3601 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr) 3602 { 3603 return dma_mapping_error(dev->dma_device, dma_addr); 3604 } 3605 3606 /** 3607 * ib_dma_map_single - Map a kernel virtual address to DMA address 3608 * @dev: The device for which the dma_addr is to be created 3609 * @cpu_addr: The kernel virtual address 3610 * @size: The size of the region in bytes 3611 * @direction: The direction of the DMA 3612 */ 3613 static inline u64 ib_dma_map_single(struct ib_device *dev, 3614 void *cpu_addr, size_t size, 3615 enum dma_data_direction direction) 3616 { 3617 return dma_map_single(dev->dma_device, cpu_addr, size, direction); 3618 } 3619 3620 /** 3621 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single() 3622 * @dev: The device for which the DMA address was created 3623 * @addr: The DMA address 3624 * @size: The size of the region in bytes 3625 * @direction: The direction of the DMA 3626 */ 3627 static inline void ib_dma_unmap_single(struct ib_device *dev, 3628 u64 addr, size_t size, 3629 enum dma_data_direction direction) 3630 { 3631 dma_unmap_single(dev->dma_device, addr, size, direction); 3632 } 3633 3634 /** 3635 * ib_dma_map_page - Map a physical page to DMA address 3636 * @dev: The device for which the dma_addr is to be created 3637 * @page: The page to be mapped 3638 * @offset: The offset within the page 3639 * @size: The size of the region in bytes 3640 * @direction: The direction of the DMA 3641 */ 3642 static inline u64 ib_dma_map_page(struct ib_device *dev, 3643 struct page *page, 3644 unsigned long offset, 3645 size_t size, 3646 enum dma_data_direction direction) 3647 { 3648 return dma_map_page(dev->dma_device, page, offset, size, direction); 3649 } 3650 3651 /** 3652 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page() 3653 * @dev: The device for which the DMA address was created 3654 * @addr: The DMA address 3655 * @size: The size of the region in bytes 3656 * @direction: The direction of the DMA 3657 */ 3658 static inline void ib_dma_unmap_page(struct ib_device *dev, 3659 u64 addr, size_t size, 3660 enum dma_data_direction direction) 3661 { 3662 dma_unmap_page(dev->dma_device, addr, size, direction); 3663 } 3664 3665 /** 3666 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses 3667 * @dev: The device for which the DMA addresses are to be created 3668 * @sg: The array of scatter/gather entries 3669 * @nents: The number of scatter/gather entries 3670 * @direction: The direction of the DMA 3671 */ 3672 static inline int ib_dma_map_sg(struct ib_device *dev, 3673 struct scatterlist *sg, int nents, 3674 enum dma_data_direction direction) 3675 { 3676 return dma_map_sg(dev->dma_device, sg, nents, direction); 3677 } 3678 3679 /** 3680 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses 3681 * @dev: The device for which the DMA addresses were created 3682 * @sg: The array of scatter/gather entries 3683 * @nents: The number of scatter/gather entries 3684 * @direction: The direction of the DMA 3685 */ 3686 static inline void ib_dma_unmap_sg(struct ib_device *dev, 3687 struct scatterlist *sg, int nents, 3688 enum dma_data_direction direction) 3689 { 3690 dma_unmap_sg(dev->dma_device, sg, nents, direction); 3691 } 3692 3693 static inline int ib_dma_map_sg_attrs(struct ib_device *dev, 3694 struct scatterlist *sg, int nents, 3695 enum dma_data_direction direction, 3696 unsigned long dma_attrs) 3697 { 3698 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, 3699 dma_attrs); 3700 } 3701 3702 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev, 3703 struct scatterlist *sg, int nents, 3704 enum dma_data_direction direction, 3705 unsigned long dma_attrs) 3706 { 3707 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, dma_attrs); 3708 } 3709 3710 /** 3711 * ib_dma_max_seg_size - Return the size limit of a single DMA transfer 3712 * @dev: The device to query 3713 * 3714 * The returned value represents a size in bytes. 3715 */ 3716 static inline unsigned int ib_dma_max_seg_size(struct ib_device *dev) 3717 { 3718 struct device_dma_parameters *p = dev->dma_device->dma_parms; 3719 3720 return p ? p->max_segment_size : UINT_MAX; 3721 } 3722 3723 /** 3724 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU 3725 * @dev: The device for which the DMA address was created 3726 * @addr: The DMA address 3727 * @size: The size of the region in bytes 3728 * @dir: The direction of the DMA 3729 */ 3730 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev, 3731 u64 addr, 3732 size_t size, 3733 enum dma_data_direction dir) 3734 { 3735 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir); 3736 } 3737 3738 /** 3739 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device 3740 * @dev: The device for which the DMA address was created 3741 * @addr: The DMA address 3742 * @size: The size of the region in bytes 3743 * @dir: The direction of the DMA 3744 */ 3745 static inline void ib_dma_sync_single_for_device(struct ib_device *dev, 3746 u64 addr, 3747 size_t size, 3748 enum dma_data_direction dir) 3749 { 3750 dma_sync_single_for_device(dev->dma_device, addr, size, dir); 3751 } 3752 3753 /** 3754 * ib_dma_alloc_coherent - Allocate memory and map it for DMA 3755 * @dev: The device for which the DMA address is requested 3756 * @size: The size of the region to allocate in bytes 3757 * @dma_handle: A pointer for returning the DMA address of the region 3758 * @flag: memory allocator flags 3759 */ 3760 static inline void *ib_dma_alloc_coherent(struct ib_device *dev, 3761 size_t size, 3762 dma_addr_t *dma_handle, 3763 gfp_t flag) 3764 { 3765 return dma_alloc_coherent(dev->dma_device, size, dma_handle, flag); 3766 } 3767 3768 /** 3769 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent() 3770 * @dev: The device for which the DMA addresses were allocated 3771 * @size: The size of the region 3772 * @cpu_addr: the address returned by ib_dma_alloc_coherent() 3773 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent() 3774 */ 3775 static inline void ib_dma_free_coherent(struct ib_device *dev, 3776 size_t size, void *cpu_addr, 3777 dma_addr_t dma_handle) 3778 { 3779 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle); 3780 } 3781 3782 /** 3783 * ib_dereg_mr - Deregisters a memory region and removes it from the 3784 * HCA translation table. 3785 * @mr: The memory region to deregister. 3786 * 3787 * This function can fail, if the memory region has memory windows bound to it. 3788 */ 3789 int ib_dereg_mr(struct ib_mr *mr); 3790 3791 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, 3792 enum ib_mr_type mr_type, 3793 u32 max_num_sg); 3794 3795 /** 3796 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR 3797 * R_Key and L_Key. 3798 * @mr - struct ib_mr pointer to be updated. 3799 * @newkey - new key to be used. 3800 */ 3801 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey) 3802 { 3803 mr->lkey = (mr->lkey & 0xffffff00) | newkey; 3804 mr->rkey = (mr->rkey & 0xffffff00) | newkey; 3805 } 3806 3807 /** 3808 * ib_inc_rkey - increments the key portion of the given rkey. Can be used 3809 * for calculating a new rkey for type 2 memory windows. 3810 * @rkey - the rkey to increment. 3811 */ 3812 static inline u32 ib_inc_rkey(u32 rkey) 3813 { 3814 const u32 mask = 0x000000ff; 3815 return ((rkey + 1) & mask) | (rkey & ~mask); 3816 } 3817 3818 /** 3819 * ib_alloc_fmr - Allocates a unmapped fast memory region. 3820 * @pd: The protection domain associated with the unmapped region. 3821 * @mr_access_flags: Specifies the memory access rights. 3822 * @fmr_attr: Attributes of the unmapped region. 3823 * 3824 * A fast memory region must be mapped before it can be used as part of 3825 * a work request. 3826 */ 3827 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 3828 int mr_access_flags, 3829 struct ib_fmr_attr *fmr_attr); 3830 3831 /** 3832 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region. 3833 * @fmr: The fast memory region to associate with the pages. 3834 * @page_list: An array of physical pages to map to the fast memory region. 3835 * @list_len: The number of pages in page_list. 3836 * @iova: The I/O virtual address to use with the mapped region. 3837 */ 3838 static inline int ib_map_phys_fmr(struct ib_fmr *fmr, 3839 u64 *page_list, int list_len, 3840 u64 iova) 3841 { 3842 return fmr->device->ops.map_phys_fmr(fmr, page_list, list_len, iova); 3843 } 3844 3845 /** 3846 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions. 3847 * @fmr_list: A linked list of fast memory regions to unmap. 3848 */ 3849 int ib_unmap_fmr(struct list_head *fmr_list); 3850 3851 /** 3852 * ib_dealloc_fmr - Deallocates a fast memory region. 3853 * @fmr: The fast memory region to deallocate. 3854 */ 3855 int ib_dealloc_fmr(struct ib_fmr *fmr); 3856 3857 /** 3858 * ib_attach_mcast - Attaches the specified QP to a multicast group. 3859 * @qp: QP to attach to the multicast group. The QP must be type 3860 * IB_QPT_UD. 3861 * @gid: Multicast group GID. 3862 * @lid: Multicast group LID in host byte order. 3863 * 3864 * In order to send and receive multicast packets, subnet 3865 * administration must have created the multicast group and configured 3866 * the fabric appropriately. The port associated with the specified 3867 * QP must also be a member of the multicast group. 3868 */ 3869 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 3870 3871 /** 3872 * ib_detach_mcast - Detaches the specified QP from a multicast group. 3873 * @qp: QP to detach from the multicast group. 3874 * @gid: Multicast group GID. 3875 * @lid: Multicast group LID in host byte order. 3876 */ 3877 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 3878 3879 /** 3880 * ib_alloc_xrcd - Allocates an XRC domain. 3881 * @device: The device on which to allocate the XRC domain. 3882 * @caller: Module name for kernel consumers 3883 */ 3884 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller); 3885 #define ib_alloc_xrcd(device) \ 3886 __ib_alloc_xrcd((device), KBUILD_MODNAME) 3887 3888 /** 3889 * ib_dealloc_xrcd - Deallocates an XRC domain. 3890 * @xrcd: The XRC domain to deallocate. 3891 */ 3892 int ib_dealloc_xrcd(struct ib_xrcd *xrcd); 3893 3894 static inline int ib_check_mr_access(int flags) 3895 { 3896 /* 3897 * Local write permission is required if remote write or 3898 * remote atomic permission is also requested. 3899 */ 3900 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && 3901 !(flags & IB_ACCESS_LOCAL_WRITE)) 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 /** 3937 * ib_device_try_get: Hold a registration lock 3938 * device: The device to lock 3939 * 3940 * A device under an active registration lock cannot become unregistered. It 3941 * is only possible to obtain a registration lock on a device that is fully 3942 * registered, otherwise this function returns false. 3943 * 3944 * The registration lock is only necessary for actions which require the 3945 * device to still be registered. Uses that only require the device pointer to 3946 * be valid should use get_device(&ibdev->dev) to hold the memory. 3947 * 3948 */ 3949 static inline bool ib_device_try_get(struct ib_device *dev) 3950 { 3951 return refcount_inc_not_zero(&dev->refcount); 3952 } 3953 3954 void ib_device_put(struct ib_device *device); 3955 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, 3956 u16 pkey, const union ib_gid *gid, 3957 const struct sockaddr *addr); 3958 struct ib_wq *ib_create_wq(struct ib_pd *pd, 3959 struct ib_wq_init_attr *init_attr); 3960 int ib_destroy_wq(struct ib_wq *wq); 3961 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *attr, 3962 u32 wq_attr_mask); 3963 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 3964 struct ib_rwq_ind_table_init_attr* 3965 wq_ind_table_init_attr); 3966 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table); 3967 3968 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 3969 unsigned int *sg_offset, unsigned int page_size); 3970 3971 static inline int 3972 ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 3973 unsigned int *sg_offset, unsigned int page_size) 3974 { 3975 int n; 3976 3977 n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, page_size); 3978 mr->iova = 0; 3979 3980 return n; 3981 } 3982 3983 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 3984 unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64)); 3985 3986 void ib_drain_rq(struct ib_qp *qp); 3987 void ib_drain_sq(struct ib_qp *qp); 3988 void ib_drain_qp(struct ib_qp *qp); 3989 3990 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width); 3991 3992 static inline u8 *rdma_ah_retrieve_dmac(struct rdma_ah_attr *attr) 3993 { 3994 if (attr->type == RDMA_AH_ATTR_TYPE_ROCE) 3995 return attr->roce.dmac; 3996 return NULL; 3997 } 3998 3999 static inline void rdma_ah_set_dlid(struct rdma_ah_attr *attr, u32 dlid) 4000 { 4001 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4002 attr->ib.dlid = (u16)dlid; 4003 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4004 attr->opa.dlid = dlid; 4005 } 4006 4007 static inline u32 rdma_ah_get_dlid(const struct rdma_ah_attr *attr) 4008 { 4009 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4010 return attr->ib.dlid; 4011 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4012 return attr->opa.dlid; 4013 return 0; 4014 } 4015 4016 static inline void rdma_ah_set_sl(struct rdma_ah_attr *attr, u8 sl) 4017 { 4018 attr->sl = sl; 4019 } 4020 4021 static inline u8 rdma_ah_get_sl(const struct rdma_ah_attr *attr) 4022 { 4023 return attr->sl; 4024 } 4025 4026 static inline void rdma_ah_set_path_bits(struct rdma_ah_attr *attr, 4027 u8 src_path_bits) 4028 { 4029 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4030 attr->ib.src_path_bits = src_path_bits; 4031 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4032 attr->opa.src_path_bits = src_path_bits; 4033 } 4034 4035 static inline u8 rdma_ah_get_path_bits(const struct rdma_ah_attr *attr) 4036 { 4037 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4038 return attr->ib.src_path_bits; 4039 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4040 return attr->opa.src_path_bits; 4041 return 0; 4042 } 4043 4044 static inline void rdma_ah_set_make_grd(struct rdma_ah_attr *attr, 4045 bool make_grd) 4046 { 4047 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4048 attr->opa.make_grd = make_grd; 4049 } 4050 4051 static inline bool rdma_ah_get_make_grd(const struct rdma_ah_attr *attr) 4052 { 4053 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4054 return attr->opa.make_grd; 4055 return false; 4056 } 4057 4058 static inline void rdma_ah_set_port_num(struct rdma_ah_attr *attr, u8 port_num) 4059 { 4060 attr->port_num = port_num; 4061 } 4062 4063 static inline u8 rdma_ah_get_port_num(const struct rdma_ah_attr *attr) 4064 { 4065 return attr->port_num; 4066 } 4067 4068 static inline void rdma_ah_set_static_rate(struct rdma_ah_attr *attr, 4069 u8 static_rate) 4070 { 4071 attr->static_rate = static_rate; 4072 } 4073 4074 static inline u8 rdma_ah_get_static_rate(const struct rdma_ah_attr *attr) 4075 { 4076 return attr->static_rate; 4077 } 4078 4079 static inline void rdma_ah_set_ah_flags(struct rdma_ah_attr *attr, 4080 enum ib_ah_flags flag) 4081 { 4082 attr->ah_flags = flag; 4083 } 4084 4085 static inline enum ib_ah_flags 4086 rdma_ah_get_ah_flags(const struct rdma_ah_attr *attr) 4087 { 4088 return attr->ah_flags; 4089 } 4090 4091 static inline const struct ib_global_route 4092 *rdma_ah_read_grh(const struct rdma_ah_attr *attr) 4093 { 4094 return &attr->grh; 4095 } 4096 4097 /*To retrieve and modify the grh */ 4098 static inline struct ib_global_route 4099 *rdma_ah_retrieve_grh(struct rdma_ah_attr *attr) 4100 { 4101 return &attr->grh; 4102 } 4103 4104 static inline void rdma_ah_set_dgid_raw(struct rdma_ah_attr *attr, void *dgid) 4105 { 4106 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4107 4108 memcpy(grh->dgid.raw, dgid, sizeof(grh->dgid)); 4109 } 4110 4111 static inline void rdma_ah_set_subnet_prefix(struct rdma_ah_attr *attr, 4112 __be64 prefix) 4113 { 4114 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4115 4116 grh->dgid.global.subnet_prefix = prefix; 4117 } 4118 4119 static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr, 4120 __be64 if_id) 4121 { 4122 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4123 4124 grh->dgid.global.interface_id = if_id; 4125 } 4126 4127 static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr, 4128 union ib_gid *dgid, u32 flow_label, 4129 u8 sgid_index, u8 hop_limit, 4130 u8 traffic_class) 4131 { 4132 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4133 4134 attr->ah_flags = IB_AH_GRH; 4135 if (dgid) 4136 grh->dgid = *dgid; 4137 grh->flow_label = flow_label; 4138 grh->sgid_index = sgid_index; 4139 grh->hop_limit = hop_limit; 4140 grh->traffic_class = traffic_class; 4141 grh->sgid_attr = NULL; 4142 } 4143 4144 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr); 4145 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid, 4146 u32 flow_label, u8 hop_limit, u8 traffic_class, 4147 const struct ib_gid_attr *sgid_attr); 4148 void rdma_copy_ah_attr(struct rdma_ah_attr *dest, 4149 const struct rdma_ah_attr *src); 4150 void rdma_replace_ah_attr(struct rdma_ah_attr *old, 4151 const struct rdma_ah_attr *new); 4152 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src); 4153 4154 /** 4155 * rdma_ah_find_type - Return address handle type. 4156 * 4157 * @dev: Device to be checked 4158 * @port_num: Port number 4159 */ 4160 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev, 4161 u8 port_num) 4162 { 4163 if (rdma_protocol_roce(dev, port_num)) 4164 return RDMA_AH_ATTR_TYPE_ROCE; 4165 if (rdma_protocol_ib(dev, port_num)) { 4166 if (rdma_cap_opa_ah(dev, port_num)) 4167 return RDMA_AH_ATTR_TYPE_OPA; 4168 return RDMA_AH_ATTR_TYPE_IB; 4169 } 4170 4171 return RDMA_AH_ATTR_TYPE_UNDEFINED; 4172 } 4173 4174 /** 4175 * ib_lid_cpu16 - Return lid in 16bit CPU encoding. 4176 * In the current implementation the only way to get 4177 * get the 32bit lid is from other sources for OPA. 4178 * For IB, lids will always be 16bits so cast the 4179 * value accordingly. 4180 * 4181 * @lid: A 32bit LID 4182 */ 4183 static inline u16 ib_lid_cpu16(u32 lid) 4184 { 4185 WARN_ON_ONCE(lid & 0xFFFF0000); 4186 return (u16)lid; 4187 } 4188 4189 /** 4190 * ib_lid_be16 - Return lid in 16bit BE encoding. 4191 * 4192 * @lid: A 32bit LID 4193 */ 4194 static inline __be16 ib_lid_be16(u32 lid) 4195 { 4196 WARN_ON_ONCE(lid & 0xFFFF0000); 4197 return cpu_to_be16((u16)lid); 4198 } 4199 4200 /** 4201 * ib_get_vector_affinity - Get the affinity mappings of a given completion 4202 * vector 4203 * @device: the rdma device 4204 * @comp_vector: index of completion vector 4205 * 4206 * Returns NULL on failure, otherwise a corresponding cpu map of the 4207 * completion vector (returns all-cpus map if the device driver doesn't 4208 * implement get_vector_affinity). 4209 */ 4210 static inline const struct cpumask * 4211 ib_get_vector_affinity(struct ib_device *device, int comp_vector) 4212 { 4213 if (comp_vector < 0 || comp_vector >= device->num_comp_vectors || 4214 !device->ops.get_vector_affinity) 4215 return NULL; 4216 4217 return device->ops.get_vector_affinity(device, comp_vector); 4218 4219 } 4220 4221 /** 4222 * rdma_roce_rescan_device - Rescan all of the network devices in the system 4223 * and add their gids, as needed, to the relevant RoCE devices. 4224 * 4225 * @device: the rdma device 4226 */ 4227 void rdma_roce_rescan_device(struct ib_device *ibdev); 4228 4229 struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile); 4230 4231 struct ib_ucontext *rdma_get_ucontext(struct ib_udata *udata); 4232 4233 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs); 4234 4235 struct net_device *rdma_alloc_netdev(struct ib_device *device, u8 port_num, 4236 enum rdma_netdev_t type, const char *name, 4237 unsigned char name_assign_type, 4238 void (*setup)(struct net_device *)); 4239 4240 int rdma_init_netdev(struct ib_device *device, u8 port_num, 4241 enum rdma_netdev_t type, const char *name, 4242 unsigned char name_assign_type, 4243 void (*setup)(struct net_device *), 4244 struct net_device *netdev); 4245 4246 /** 4247 * rdma_set_device_sysfs_group - Set device attributes group to have 4248 * driver specific sysfs entries at 4249 * for infiniband class. 4250 * 4251 * @device: device pointer for which attributes to be created 4252 * @group: Pointer to group which should be added when device 4253 * is registered with sysfs. 4254 * rdma_set_device_sysfs_group() allows existing drivers to expose one 4255 * group per device to have sysfs attributes. 4256 * 4257 * NOTE: New drivers should not make use of this API; instead new device 4258 * parameter should be exposed via netlink command. This API and mechanism 4259 * exist only for existing drivers. 4260 */ 4261 static inline void 4262 rdma_set_device_sysfs_group(struct ib_device *dev, 4263 const struct attribute_group *group) 4264 { 4265 dev->groups[1] = group; 4266 } 4267 4268 /** 4269 * rdma_device_to_ibdev - Get ib_device pointer from device pointer 4270 * 4271 * @device: device pointer for which ib_device pointer to retrieve 4272 * 4273 * rdma_device_to_ibdev() retrieves ib_device pointer from device. 4274 * 4275 */ 4276 static inline struct ib_device *rdma_device_to_ibdev(struct device *device) 4277 { 4278 return container_of(device, struct ib_device, dev); 4279 } 4280 4281 /** 4282 * rdma_device_to_drv_device - Helper macro to reach back to driver's 4283 * ib_device holder structure from device pointer. 4284 * 4285 * NOTE: New drivers should not make use of this API; This API is only for 4286 * existing drivers who have exposed sysfs entries using 4287 * rdma_set_device_sysfs_group(). 4288 */ 4289 #define rdma_device_to_drv_device(dev, drv_dev_struct, ibdev_member) \ 4290 container_of(rdma_device_to_ibdev(dev), drv_dev_struct, ibdev_member) 4291 #endif /* IB_VERBS_H */ 4292