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 <linux/irqflags.h> 63 #include <linux/preempt.h> 64 #include <uapi/rdma/ib_user_verbs.h> 65 #include <rdma/restrack.h> 66 #include <rdma/signature.h> 67 #include <uapi/rdma/rdma_user_ioctl.h> 68 #include <uapi/rdma/ib_user_ioctl_verbs.h> 69 70 #define IB_FW_VERSION_NAME_MAX ETHTOOL_FWVERS_LEN 71 72 struct ib_umem_odp; 73 74 extern struct workqueue_struct *ib_wq; 75 extern struct workqueue_struct *ib_comp_wq; 76 extern struct workqueue_struct *ib_comp_unbound_wq; 77 78 __printf(3, 4) __cold 79 void ibdev_printk(const char *level, const struct ib_device *ibdev, 80 const char *format, ...); 81 __printf(2, 3) __cold 82 void ibdev_emerg(const struct ib_device *ibdev, const char *format, ...); 83 __printf(2, 3) __cold 84 void ibdev_alert(const struct ib_device *ibdev, const char *format, ...); 85 __printf(2, 3) __cold 86 void ibdev_crit(const struct ib_device *ibdev, const char *format, ...); 87 __printf(2, 3) __cold 88 void ibdev_err(const struct ib_device *ibdev, const char *format, ...); 89 __printf(2, 3) __cold 90 void ibdev_warn(const struct ib_device *ibdev, const char *format, ...); 91 __printf(2, 3) __cold 92 void ibdev_notice(const struct ib_device *ibdev, const char *format, ...); 93 __printf(2, 3) __cold 94 void ibdev_info(const struct ib_device *ibdev, const char *format, ...); 95 96 #if defined(CONFIG_DYNAMIC_DEBUG) 97 #define ibdev_dbg(__dev, format, args...) \ 98 dynamic_ibdev_dbg(__dev, format, ##args) 99 #elif defined(DEBUG) 100 #define ibdev_dbg(__dev, format, args...) \ 101 ibdev_printk(KERN_DEBUG, __dev, format, ##args) 102 #else 103 __printf(2, 3) __cold 104 static inline 105 void ibdev_dbg(const struct ib_device *ibdev, const char *format, ...) {} 106 #endif 107 108 union ib_gid { 109 u8 raw[16]; 110 struct { 111 __be64 subnet_prefix; 112 __be64 interface_id; 113 } global; 114 }; 115 116 extern union ib_gid zgid; 117 118 enum ib_gid_type { 119 /* If link layer is Ethernet, this is RoCE V1 */ 120 IB_GID_TYPE_IB = 0, 121 IB_GID_TYPE_ROCE = 0, 122 IB_GID_TYPE_ROCE_UDP_ENCAP = 1, 123 IB_GID_TYPE_SIZE 124 }; 125 126 #define ROCE_V2_UDP_DPORT 4791 127 struct ib_gid_attr { 128 struct net_device __rcu *ndev; 129 struct ib_device *device; 130 union ib_gid gid; 131 enum ib_gid_type gid_type; 132 u16 index; 133 u8 port_num; 134 }; 135 136 enum { 137 /* set the local administered indication */ 138 IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) | 2, 139 }; 140 141 enum rdma_transport_type { 142 RDMA_TRANSPORT_IB, 143 RDMA_TRANSPORT_IWARP, 144 RDMA_TRANSPORT_USNIC, 145 RDMA_TRANSPORT_USNIC_UDP, 146 RDMA_TRANSPORT_UNSPECIFIED, 147 }; 148 149 enum rdma_protocol_type { 150 RDMA_PROTOCOL_IB, 151 RDMA_PROTOCOL_IBOE, 152 RDMA_PROTOCOL_IWARP, 153 RDMA_PROTOCOL_USNIC_UDP 154 }; 155 156 __attribute_const__ enum rdma_transport_type 157 rdma_node_get_transport(unsigned int node_type); 158 159 enum rdma_network_type { 160 RDMA_NETWORK_IB, 161 RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB, 162 RDMA_NETWORK_IPV4, 163 RDMA_NETWORK_IPV6 164 }; 165 166 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type) 167 { 168 if (network_type == RDMA_NETWORK_IPV4 || 169 network_type == RDMA_NETWORK_IPV6) 170 return IB_GID_TYPE_ROCE_UDP_ENCAP; 171 172 /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */ 173 return IB_GID_TYPE_IB; 174 } 175 176 static inline enum rdma_network_type 177 rdma_gid_attr_network_type(const struct ib_gid_attr *attr) 178 { 179 if (attr->gid_type == IB_GID_TYPE_IB) 180 return RDMA_NETWORK_IB; 181 182 if (ipv6_addr_v4mapped((struct in6_addr *)&attr->gid)) 183 return RDMA_NETWORK_IPV4; 184 else 185 return RDMA_NETWORK_IPV6; 186 } 187 188 enum rdma_link_layer { 189 IB_LINK_LAYER_UNSPECIFIED, 190 IB_LINK_LAYER_INFINIBAND, 191 IB_LINK_LAYER_ETHERNET, 192 }; 193 194 enum ib_device_cap_flags { 195 IB_DEVICE_RESIZE_MAX_WR = (1 << 0), 196 IB_DEVICE_BAD_PKEY_CNTR = (1 << 1), 197 IB_DEVICE_BAD_QKEY_CNTR = (1 << 2), 198 IB_DEVICE_RAW_MULTI = (1 << 3), 199 IB_DEVICE_AUTO_PATH_MIG = (1 << 4), 200 IB_DEVICE_CHANGE_PHY_PORT = (1 << 5), 201 IB_DEVICE_UD_AV_PORT_ENFORCE = (1 << 6), 202 IB_DEVICE_CURR_QP_STATE_MOD = (1 << 7), 203 IB_DEVICE_SHUTDOWN_PORT = (1 << 8), 204 /* Not in use, former INIT_TYPE = (1 << 9),*/ 205 IB_DEVICE_PORT_ACTIVE_EVENT = (1 << 10), 206 IB_DEVICE_SYS_IMAGE_GUID = (1 << 11), 207 IB_DEVICE_RC_RNR_NAK_GEN = (1 << 12), 208 IB_DEVICE_SRQ_RESIZE = (1 << 13), 209 IB_DEVICE_N_NOTIFY_CQ = (1 << 14), 210 211 /* 212 * This device supports a per-device lkey or stag that can be 213 * used without performing a memory registration for the local 214 * memory. Note that ULPs should never check this flag, but 215 * instead of use the local_dma_lkey flag in the ib_pd structure, 216 * which will always contain a usable lkey. 217 */ 218 IB_DEVICE_LOCAL_DMA_LKEY = (1 << 15), 219 /* Reserved, old SEND_W_INV = (1 << 16),*/ 220 IB_DEVICE_MEM_WINDOW = (1 << 17), 221 /* 222 * Devices should set IB_DEVICE_UD_IP_SUM if they support 223 * insertion of UDP and TCP checksum on outgoing UD IPoIB 224 * messages and can verify the validity of checksum for 225 * incoming messages. Setting this flag implies that the 226 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode. 227 */ 228 IB_DEVICE_UD_IP_CSUM = (1 << 18), 229 IB_DEVICE_UD_TSO = (1 << 19), 230 IB_DEVICE_XRC = (1 << 20), 231 232 /* 233 * This device supports the IB "base memory management extension", 234 * which includes support for fast registrations (IB_WR_REG_MR, 235 * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should 236 * also be set by any iWarp device which must support FRs to comply 237 * to the iWarp verbs spec. iWarp devices also support the 238 * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the 239 * stag. 240 */ 241 IB_DEVICE_MEM_MGT_EXTENSIONS = (1 << 21), 242 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1 << 22), 243 IB_DEVICE_MEM_WINDOW_TYPE_2A = (1 << 23), 244 IB_DEVICE_MEM_WINDOW_TYPE_2B = (1 << 24), 245 IB_DEVICE_RC_IP_CSUM = (1 << 25), 246 /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */ 247 IB_DEVICE_RAW_IP_CSUM = (1 << 26), 248 /* 249 * Devices should set IB_DEVICE_CROSS_CHANNEL if they 250 * support execution of WQEs that involve synchronization 251 * of I/O operations with single completion queue managed 252 * by hardware. 253 */ 254 IB_DEVICE_CROSS_CHANNEL = (1 << 27), 255 IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29), 256 IB_DEVICE_INTEGRITY_HANDOVER = (1 << 30), 257 IB_DEVICE_ON_DEMAND_PAGING = (1ULL << 31), 258 IB_DEVICE_SG_GAPS_REG = (1ULL << 32), 259 IB_DEVICE_VIRTUAL_FUNCTION = (1ULL << 33), 260 /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */ 261 IB_DEVICE_RAW_SCATTER_FCS = (1ULL << 34), 262 IB_DEVICE_RDMA_NETDEV_OPA_VNIC = (1ULL << 35), 263 /* The device supports padding incoming writes to cacheline. */ 264 IB_DEVICE_PCI_WRITE_END_PADDING = (1ULL << 36), 265 IB_DEVICE_ALLOW_USER_UNREG = (1ULL << 37), 266 }; 267 268 enum ib_atomic_cap { 269 IB_ATOMIC_NONE, 270 IB_ATOMIC_HCA, 271 IB_ATOMIC_GLOB 272 }; 273 274 enum ib_odp_general_cap_bits { 275 IB_ODP_SUPPORT = 1 << 0, 276 IB_ODP_SUPPORT_IMPLICIT = 1 << 1, 277 }; 278 279 enum ib_odp_transport_cap_bits { 280 IB_ODP_SUPPORT_SEND = 1 << 0, 281 IB_ODP_SUPPORT_RECV = 1 << 1, 282 IB_ODP_SUPPORT_WRITE = 1 << 2, 283 IB_ODP_SUPPORT_READ = 1 << 3, 284 IB_ODP_SUPPORT_ATOMIC = 1 << 4, 285 IB_ODP_SUPPORT_SRQ_RECV = 1 << 5, 286 }; 287 288 struct ib_odp_caps { 289 uint64_t general_caps; 290 struct { 291 uint32_t rc_odp_caps; 292 uint32_t uc_odp_caps; 293 uint32_t ud_odp_caps; 294 uint32_t xrc_odp_caps; 295 } per_transport_caps; 296 }; 297 298 struct ib_rss_caps { 299 /* Corresponding bit will be set if qp type from 300 * 'enum ib_qp_type' is supported, e.g. 301 * supported_qpts |= 1 << IB_QPT_UD 302 */ 303 u32 supported_qpts; 304 u32 max_rwq_indirection_tables; 305 u32 max_rwq_indirection_table_size; 306 }; 307 308 enum ib_tm_cap_flags { 309 /* Support tag matching on RC transport */ 310 IB_TM_CAP_RC = 1 << 0, 311 }; 312 313 struct ib_tm_caps { 314 /* Max size of RNDV header */ 315 u32 max_rndv_hdr_size; 316 /* Max number of entries in tag matching list */ 317 u32 max_num_tags; 318 /* From enum ib_tm_cap_flags */ 319 u32 flags; 320 /* Max number of outstanding list operations */ 321 u32 max_ops; 322 /* Max number of SGE in tag matching entry */ 323 u32 max_sge; 324 }; 325 326 struct ib_cq_init_attr { 327 unsigned int cqe; 328 int comp_vector; 329 u32 flags; 330 }; 331 332 enum ib_cq_attr_mask { 333 IB_CQ_MODERATE = 1 << 0, 334 }; 335 336 struct ib_cq_caps { 337 u16 max_cq_moderation_count; 338 u16 max_cq_moderation_period; 339 }; 340 341 struct ib_dm_mr_attr { 342 u64 length; 343 u64 offset; 344 u32 access_flags; 345 }; 346 347 struct ib_dm_alloc_attr { 348 u64 length; 349 u32 alignment; 350 u32 flags; 351 }; 352 353 struct ib_device_attr { 354 u64 fw_ver; 355 __be64 sys_image_guid; 356 u64 max_mr_size; 357 u64 page_size_cap; 358 u32 vendor_id; 359 u32 vendor_part_id; 360 u32 hw_ver; 361 int max_qp; 362 int max_qp_wr; 363 u64 device_cap_flags; 364 int max_send_sge; 365 int max_recv_sge; 366 int max_sge_rd; 367 int max_cq; 368 int max_cqe; 369 int max_mr; 370 int max_pd; 371 int max_qp_rd_atom; 372 int max_ee_rd_atom; 373 int max_res_rd_atom; 374 int max_qp_init_rd_atom; 375 int max_ee_init_rd_atom; 376 enum ib_atomic_cap atomic_cap; 377 enum ib_atomic_cap masked_atomic_cap; 378 int max_ee; 379 int max_rdd; 380 int max_mw; 381 int max_raw_ipv6_qp; 382 int max_raw_ethy_qp; 383 int max_mcast_grp; 384 int max_mcast_qp_attach; 385 int max_total_mcast_qp_attach; 386 int max_ah; 387 int max_fmr; 388 int max_map_per_fmr; 389 int max_srq; 390 int max_srq_wr; 391 int max_srq_sge; 392 unsigned int max_fast_reg_page_list_len; 393 unsigned int max_pi_fast_reg_page_list_len; 394 u16 max_pkeys; 395 u8 local_ca_ack_delay; 396 int sig_prot_cap; 397 int sig_guard_cap; 398 struct ib_odp_caps odp_caps; 399 uint64_t timestamp_mask; 400 uint64_t hca_core_clock; /* in KHZ */ 401 struct ib_rss_caps rss_caps; 402 u32 max_wq_type_rq; 403 u32 raw_packet_caps; /* Use ib_raw_packet_caps enum */ 404 struct ib_tm_caps tm_caps; 405 struct ib_cq_caps cq_caps; 406 u64 max_dm_size; 407 }; 408 409 enum ib_mtu { 410 IB_MTU_256 = 1, 411 IB_MTU_512 = 2, 412 IB_MTU_1024 = 3, 413 IB_MTU_2048 = 4, 414 IB_MTU_4096 = 5 415 }; 416 417 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu) 418 { 419 switch (mtu) { 420 case IB_MTU_256: return 256; 421 case IB_MTU_512: return 512; 422 case IB_MTU_1024: return 1024; 423 case IB_MTU_2048: return 2048; 424 case IB_MTU_4096: return 4096; 425 default: return -1; 426 } 427 } 428 429 static inline enum ib_mtu ib_mtu_int_to_enum(int mtu) 430 { 431 if (mtu >= 4096) 432 return IB_MTU_4096; 433 else if (mtu >= 2048) 434 return IB_MTU_2048; 435 else if (mtu >= 1024) 436 return IB_MTU_1024; 437 else if (mtu >= 512) 438 return IB_MTU_512; 439 else 440 return IB_MTU_256; 441 } 442 443 enum ib_port_state { 444 IB_PORT_NOP = 0, 445 IB_PORT_DOWN = 1, 446 IB_PORT_INIT = 2, 447 IB_PORT_ARMED = 3, 448 IB_PORT_ACTIVE = 4, 449 IB_PORT_ACTIVE_DEFER = 5 450 }; 451 452 enum ib_port_width { 453 IB_WIDTH_1X = 1, 454 IB_WIDTH_2X = 16, 455 IB_WIDTH_4X = 2, 456 IB_WIDTH_8X = 4, 457 IB_WIDTH_12X = 8 458 }; 459 460 static inline int ib_width_enum_to_int(enum ib_port_width width) 461 { 462 switch (width) { 463 case IB_WIDTH_1X: return 1; 464 case IB_WIDTH_2X: return 2; 465 case IB_WIDTH_4X: return 4; 466 case IB_WIDTH_8X: return 8; 467 case IB_WIDTH_12X: return 12; 468 default: return -1; 469 } 470 } 471 472 enum ib_port_speed { 473 IB_SPEED_SDR = 1, 474 IB_SPEED_DDR = 2, 475 IB_SPEED_QDR = 4, 476 IB_SPEED_FDR10 = 8, 477 IB_SPEED_FDR = 16, 478 IB_SPEED_EDR = 32, 479 IB_SPEED_HDR = 64 480 }; 481 482 /** 483 * struct rdma_hw_stats 484 * @lock - Mutex to protect parallel write access to lifespan and values 485 * of counters, which are 64bits and not guaranteeed to be written 486 * atomicaly on 32bits systems. 487 * @timestamp - Used by the core code to track when the last update was 488 * @lifespan - Used by the core code to determine how old the counters 489 * should be before being updated again. Stored in jiffies, defaults 490 * to 10 milliseconds, drivers can override the default be specifying 491 * their own value during their allocation routine. 492 * @name - Array of pointers to static names used for the counters in 493 * directory. 494 * @num_counters - How many hardware counters there are. If name is 495 * shorter than this number, a kernel oops will result. Driver authors 496 * are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters) 497 * in their code to prevent this. 498 * @value - Array of u64 counters that are accessed by the sysfs code and 499 * filled in by the drivers get_stats routine 500 */ 501 struct rdma_hw_stats { 502 struct mutex lock; /* Protect lifespan and values[] */ 503 unsigned long timestamp; 504 unsigned long lifespan; 505 const char * const *names; 506 int num_counters; 507 u64 value[]; 508 }; 509 510 #define RDMA_HW_STATS_DEFAULT_LIFESPAN 10 511 /** 512 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct 513 * for drivers. 514 * @names - Array of static const char * 515 * @num_counters - How many elements in array 516 * @lifespan - How many milliseconds between updates 517 */ 518 static inline struct rdma_hw_stats *rdma_alloc_hw_stats_struct( 519 const char * const *names, int num_counters, 520 unsigned long lifespan) 521 { 522 struct rdma_hw_stats *stats; 523 524 stats = kzalloc(sizeof(*stats) + num_counters * sizeof(u64), 525 GFP_KERNEL); 526 if (!stats) 527 return NULL; 528 stats->names = names; 529 stats->num_counters = num_counters; 530 stats->lifespan = msecs_to_jiffies(lifespan); 531 532 return stats; 533 } 534 535 536 /* Define bits for the various functionality this port needs to be supported by 537 * the core. 538 */ 539 /* Management 0x00000FFF */ 540 #define RDMA_CORE_CAP_IB_MAD 0x00000001 541 #define RDMA_CORE_CAP_IB_SMI 0x00000002 542 #define RDMA_CORE_CAP_IB_CM 0x00000004 543 #define RDMA_CORE_CAP_IW_CM 0x00000008 544 #define RDMA_CORE_CAP_IB_SA 0x00000010 545 #define RDMA_CORE_CAP_OPA_MAD 0x00000020 546 547 /* Address format 0x000FF000 */ 548 #define RDMA_CORE_CAP_AF_IB 0x00001000 549 #define RDMA_CORE_CAP_ETH_AH 0x00002000 550 #define RDMA_CORE_CAP_OPA_AH 0x00004000 551 #define RDMA_CORE_CAP_IB_GRH_REQUIRED 0x00008000 552 553 /* Protocol 0xFFF00000 */ 554 #define RDMA_CORE_CAP_PROT_IB 0x00100000 555 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000 556 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000 557 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000 558 #define RDMA_CORE_CAP_PROT_RAW_PACKET 0x01000000 559 #define RDMA_CORE_CAP_PROT_USNIC 0x02000000 560 561 #define RDMA_CORE_PORT_IB_GRH_REQUIRED (RDMA_CORE_CAP_IB_GRH_REQUIRED \ 562 | RDMA_CORE_CAP_PROT_ROCE \ 563 | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP) 564 565 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \ 566 | RDMA_CORE_CAP_IB_MAD \ 567 | RDMA_CORE_CAP_IB_SMI \ 568 | RDMA_CORE_CAP_IB_CM \ 569 | RDMA_CORE_CAP_IB_SA \ 570 | RDMA_CORE_CAP_AF_IB) 571 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \ 572 | RDMA_CORE_CAP_IB_MAD \ 573 | RDMA_CORE_CAP_IB_CM \ 574 | RDMA_CORE_CAP_AF_IB \ 575 | RDMA_CORE_CAP_ETH_AH) 576 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP \ 577 (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \ 578 | RDMA_CORE_CAP_IB_MAD \ 579 | RDMA_CORE_CAP_IB_CM \ 580 | RDMA_CORE_CAP_AF_IB \ 581 | RDMA_CORE_CAP_ETH_AH) 582 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \ 583 | RDMA_CORE_CAP_IW_CM) 584 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \ 585 | RDMA_CORE_CAP_OPA_MAD) 586 587 #define RDMA_CORE_PORT_RAW_PACKET (RDMA_CORE_CAP_PROT_RAW_PACKET) 588 589 #define RDMA_CORE_PORT_USNIC (RDMA_CORE_CAP_PROT_USNIC) 590 591 struct ib_port_attr { 592 u64 subnet_prefix; 593 enum ib_port_state state; 594 enum ib_mtu max_mtu; 595 enum ib_mtu active_mtu; 596 int gid_tbl_len; 597 unsigned int ip_gids:1; 598 /* This is the value from PortInfo CapabilityMask, defined by IBA */ 599 u32 port_cap_flags; 600 u32 max_msg_sz; 601 u32 bad_pkey_cntr; 602 u32 qkey_viol_cntr; 603 u16 pkey_tbl_len; 604 u32 sm_lid; 605 u32 lid; 606 u8 lmc; 607 u8 max_vl_num; 608 u8 sm_sl; 609 u8 subnet_timeout; 610 u8 init_type_reply; 611 u8 active_width; 612 u8 active_speed; 613 u8 phys_state; 614 u16 port_cap_flags2; 615 }; 616 617 enum ib_device_modify_flags { 618 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0, 619 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1 620 }; 621 622 #define IB_DEVICE_NODE_DESC_MAX 64 623 624 struct ib_device_modify { 625 u64 sys_image_guid; 626 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 627 }; 628 629 enum ib_port_modify_flags { 630 IB_PORT_SHUTDOWN = 1, 631 IB_PORT_INIT_TYPE = (1<<2), 632 IB_PORT_RESET_QKEY_CNTR = (1<<3), 633 IB_PORT_OPA_MASK_CHG = (1<<4) 634 }; 635 636 struct ib_port_modify { 637 u32 set_port_cap_mask; 638 u32 clr_port_cap_mask; 639 u8 init_type; 640 }; 641 642 enum ib_event_type { 643 IB_EVENT_CQ_ERR, 644 IB_EVENT_QP_FATAL, 645 IB_EVENT_QP_REQ_ERR, 646 IB_EVENT_QP_ACCESS_ERR, 647 IB_EVENT_COMM_EST, 648 IB_EVENT_SQ_DRAINED, 649 IB_EVENT_PATH_MIG, 650 IB_EVENT_PATH_MIG_ERR, 651 IB_EVENT_DEVICE_FATAL, 652 IB_EVENT_PORT_ACTIVE, 653 IB_EVENT_PORT_ERR, 654 IB_EVENT_LID_CHANGE, 655 IB_EVENT_PKEY_CHANGE, 656 IB_EVENT_SM_CHANGE, 657 IB_EVENT_SRQ_ERR, 658 IB_EVENT_SRQ_LIMIT_REACHED, 659 IB_EVENT_QP_LAST_WQE_REACHED, 660 IB_EVENT_CLIENT_REREGISTER, 661 IB_EVENT_GID_CHANGE, 662 IB_EVENT_WQ_FATAL, 663 }; 664 665 const char *__attribute_const__ ib_event_msg(enum ib_event_type event); 666 667 struct ib_event { 668 struct ib_device *device; 669 union { 670 struct ib_cq *cq; 671 struct ib_qp *qp; 672 struct ib_srq *srq; 673 struct ib_wq *wq; 674 u8 port_num; 675 } element; 676 enum ib_event_type event; 677 }; 678 679 struct ib_event_handler { 680 struct ib_device *device; 681 void (*handler)(struct ib_event_handler *, struct ib_event *); 682 struct list_head list; 683 }; 684 685 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \ 686 do { \ 687 (_ptr)->device = _device; \ 688 (_ptr)->handler = _handler; \ 689 INIT_LIST_HEAD(&(_ptr)->list); \ 690 } while (0) 691 692 struct ib_global_route { 693 const struct ib_gid_attr *sgid_attr; 694 union ib_gid dgid; 695 u32 flow_label; 696 u8 sgid_index; 697 u8 hop_limit; 698 u8 traffic_class; 699 }; 700 701 struct ib_grh { 702 __be32 version_tclass_flow; 703 __be16 paylen; 704 u8 next_hdr; 705 u8 hop_limit; 706 union ib_gid sgid; 707 union ib_gid dgid; 708 }; 709 710 union rdma_network_hdr { 711 struct ib_grh ibgrh; 712 struct { 713 /* The IB spec states that if it's IPv4, the header 714 * is located in the last 20 bytes of the header. 715 */ 716 u8 reserved[20]; 717 struct iphdr roce4grh; 718 }; 719 }; 720 721 #define IB_QPN_MASK 0xFFFFFF 722 723 enum { 724 IB_MULTICAST_QPN = 0xffffff 725 }; 726 727 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF) 728 #define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000) 729 730 enum ib_ah_flags { 731 IB_AH_GRH = 1 732 }; 733 734 enum ib_rate { 735 IB_RATE_PORT_CURRENT = 0, 736 IB_RATE_2_5_GBPS = 2, 737 IB_RATE_5_GBPS = 5, 738 IB_RATE_10_GBPS = 3, 739 IB_RATE_20_GBPS = 6, 740 IB_RATE_30_GBPS = 4, 741 IB_RATE_40_GBPS = 7, 742 IB_RATE_60_GBPS = 8, 743 IB_RATE_80_GBPS = 9, 744 IB_RATE_120_GBPS = 10, 745 IB_RATE_14_GBPS = 11, 746 IB_RATE_56_GBPS = 12, 747 IB_RATE_112_GBPS = 13, 748 IB_RATE_168_GBPS = 14, 749 IB_RATE_25_GBPS = 15, 750 IB_RATE_100_GBPS = 16, 751 IB_RATE_200_GBPS = 17, 752 IB_RATE_300_GBPS = 18, 753 IB_RATE_28_GBPS = 19, 754 IB_RATE_50_GBPS = 20, 755 IB_RATE_400_GBPS = 21, 756 IB_RATE_600_GBPS = 22, 757 }; 758 759 /** 760 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the 761 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be 762 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec. 763 * @rate: rate to convert. 764 */ 765 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate); 766 767 /** 768 * ib_rate_to_mbps - Convert the IB rate enum to Mbps. 769 * For example, IB_RATE_2_5_GBPS will be converted to 2500. 770 * @rate: rate to convert. 771 */ 772 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate); 773 774 775 /** 776 * enum ib_mr_type - memory region type 777 * @IB_MR_TYPE_MEM_REG: memory region that is used for 778 * normal registration 779 * @IB_MR_TYPE_SG_GAPS: memory region that is capable to 780 * register any arbitrary sg lists (without 781 * the normal mr constraints - see 782 * ib_map_mr_sg) 783 * @IB_MR_TYPE_DM: memory region that is used for device 784 * memory registration 785 * @IB_MR_TYPE_USER: memory region that is used for the user-space 786 * application 787 * @IB_MR_TYPE_DMA: memory region that is used for DMA operations 788 * without address translations (VA=PA) 789 * @IB_MR_TYPE_INTEGRITY: memory region that is used for 790 * data integrity operations 791 */ 792 enum ib_mr_type { 793 IB_MR_TYPE_MEM_REG, 794 IB_MR_TYPE_SG_GAPS, 795 IB_MR_TYPE_DM, 796 IB_MR_TYPE_USER, 797 IB_MR_TYPE_DMA, 798 IB_MR_TYPE_INTEGRITY, 799 }; 800 801 enum ib_mr_status_check { 802 IB_MR_CHECK_SIG_STATUS = 1, 803 }; 804 805 /** 806 * struct ib_mr_status - Memory region status container 807 * 808 * @fail_status: Bitmask of MR checks status. For each 809 * failed check a corresponding status bit is set. 810 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS 811 * failure. 812 */ 813 struct ib_mr_status { 814 u32 fail_status; 815 struct ib_sig_err sig_err; 816 }; 817 818 /** 819 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate 820 * enum. 821 * @mult: multiple to convert. 822 */ 823 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult); 824 825 enum rdma_ah_attr_type { 826 RDMA_AH_ATTR_TYPE_UNDEFINED, 827 RDMA_AH_ATTR_TYPE_IB, 828 RDMA_AH_ATTR_TYPE_ROCE, 829 RDMA_AH_ATTR_TYPE_OPA, 830 }; 831 832 struct ib_ah_attr { 833 u16 dlid; 834 u8 src_path_bits; 835 }; 836 837 struct roce_ah_attr { 838 u8 dmac[ETH_ALEN]; 839 }; 840 841 struct opa_ah_attr { 842 u32 dlid; 843 u8 src_path_bits; 844 bool make_grd; 845 }; 846 847 struct rdma_ah_attr { 848 struct ib_global_route grh; 849 u8 sl; 850 u8 static_rate; 851 u8 port_num; 852 u8 ah_flags; 853 enum rdma_ah_attr_type type; 854 union { 855 struct ib_ah_attr ib; 856 struct roce_ah_attr roce; 857 struct opa_ah_attr opa; 858 }; 859 }; 860 861 enum ib_wc_status { 862 IB_WC_SUCCESS, 863 IB_WC_LOC_LEN_ERR, 864 IB_WC_LOC_QP_OP_ERR, 865 IB_WC_LOC_EEC_OP_ERR, 866 IB_WC_LOC_PROT_ERR, 867 IB_WC_WR_FLUSH_ERR, 868 IB_WC_MW_BIND_ERR, 869 IB_WC_BAD_RESP_ERR, 870 IB_WC_LOC_ACCESS_ERR, 871 IB_WC_REM_INV_REQ_ERR, 872 IB_WC_REM_ACCESS_ERR, 873 IB_WC_REM_OP_ERR, 874 IB_WC_RETRY_EXC_ERR, 875 IB_WC_RNR_RETRY_EXC_ERR, 876 IB_WC_LOC_RDD_VIOL_ERR, 877 IB_WC_REM_INV_RD_REQ_ERR, 878 IB_WC_REM_ABORT_ERR, 879 IB_WC_INV_EECN_ERR, 880 IB_WC_INV_EEC_STATE_ERR, 881 IB_WC_FATAL_ERR, 882 IB_WC_RESP_TIMEOUT_ERR, 883 IB_WC_GENERAL_ERR 884 }; 885 886 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status); 887 888 enum ib_wc_opcode { 889 IB_WC_SEND, 890 IB_WC_RDMA_WRITE, 891 IB_WC_RDMA_READ, 892 IB_WC_COMP_SWAP, 893 IB_WC_FETCH_ADD, 894 IB_WC_LSO, 895 IB_WC_LOCAL_INV, 896 IB_WC_REG_MR, 897 IB_WC_MASKED_COMP_SWAP, 898 IB_WC_MASKED_FETCH_ADD, 899 /* 900 * Set value of IB_WC_RECV so consumers can test if a completion is a 901 * receive by testing (opcode & IB_WC_RECV). 902 */ 903 IB_WC_RECV = 1 << 7, 904 IB_WC_RECV_RDMA_WITH_IMM 905 }; 906 907 enum ib_wc_flags { 908 IB_WC_GRH = 1, 909 IB_WC_WITH_IMM = (1<<1), 910 IB_WC_WITH_INVALIDATE = (1<<2), 911 IB_WC_IP_CSUM_OK = (1<<3), 912 IB_WC_WITH_SMAC = (1<<4), 913 IB_WC_WITH_VLAN = (1<<5), 914 IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6), 915 }; 916 917 struct ib_wc { 918 union { 919 u64 wr_id; 920 struct ib_cqe *wr_cqe; 921 }; 922 enum ib_wc_status status; 923 enum ib_wc_opcode opcode; 924 u32 vendor_err; 925 u32 byte_len; 926 struct ib_qp *qp; 927 union { 928 __be32 imm_data; 929 u32 invalidate_rkey; 930 } ex; 931 u32 src_qp; 932 u32 slid; 933 int wc_flags; 934 u16 pkey_index; 935 u8 sl; 936 u8 dlid_path_bits; 937 u8 port_num; /* valid only for DR SMPs on switches */ 938 u8 smac[ETH_ALEN]; 939 u16 vlan_id; 940 u8 network_hdr_type; 941 }; 942 943 enum ib_cq_notify_flags { 944 IB_CQ_SOLICITED = 1 << 0, 945 IB_CQ_NEXT_COMP = 1 << 1, 946 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP, 947 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2, 948 }; 949 950 enum ib_srq_type { 951 IB_SRQT_BASIC, 952 IB_SRQT_XRC, 953 IB_SRQT_TM, 954 }; 955 956 static inline bool ib_srq_has_cq(enum ib_srq_type srq_type) 957 { 958 return srq_type == IB_SRQT_XRC || 959 srq_type == IB_SRQT_TM; 960 } 961 962 enum ib_srq_attr_mask { 963 IB_SRQ_MAX_WR = 1 << 0, 964 IB_SRQ_LIMIT = 1 << 1, 965 }; 966 967 struct ib_srq_attr { 968 u32 max_wr; 969 u32 max_sge; 970 u32 srq_limit; 971 }; 972 973 struct ib_srq_init_attr { 974 void (*event_handler)(struct ib_event *, void *); 975 void *srq_context; 976 struct ib_srq_attr attr; 977 enum ib_srq_type srq_type; 978 979 struct { 980 struct ib_cq *cq; 981 union { 982 struct { 983 struct ib_xrcd *xrcd; 984 } xrc; 985 986 struct { 987 u32 max_num_tags; 988 } tag_matching; 989 }; 990 } ext; 991 }; 992 993 struct ib_qp_cap { 994 u32 max_send_wr; 995 u32 max_recv_wr; 996 u32 max_send_sge; 997 u32 max_recv_sge; 998 u32 max_inline_data; 999 1000 /* 1001 * Maximum number of rdma_rw_ctx structures in flight at a time. 1002 * ib_create_qp() will calculate the right amount of neededed WRs 1003 * and MRs based on this. 1004 */ 1005 u32 max_rdma_ctxs; 1006 }; 1007 1008 enum ib_sig_type { 1009 IB_SIGNAL_ALL_WR, 1010 IB_SIGNAL_REQ_WR 1011 }; 1012 1013 enum ib_qp_type { 1014 /* 1015 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries 1016 * here (and in that order) since the MAD layer uses them as 1017 * indices into a 2-entry table. 1018 */ 1019 IB_QPT_SMI, 1020 IB_QPT_GSI, 1021 1022 IB_QPT_RC, 1023 IB_QPT_UC, 1024 IB_QPT_UD, 1025 IB_QPT_RAW_IPV6, 1026 IB_QPT_RAW_ETHERTYPE, 1027 IB_QPT_RAW_PACKET = 8, 1028 IB_QPT_XRC_INI = 9, 1029 IB_QPT_XRC_TGT, 1030 IB_QPT_MAX, 1031 IB_QPT_DRIVER = 0xFF, 1032 /* Reserve a range for qp types internal to the low level driver. 1033 * These qp types will not be visible at the IB core layer, so the 1034 * IB_QPT_MAX usages should not be affected in the core layer 1035 */ 1036 IB_QPT_RESERVED1 = 0x1000, 1037 IB_QPT_RESERVED2, 1038 IB_QPT_RESERVED3, 1039 IB_QPT_RESERVED4, 1040 IB_QPT_RESERVED5, 1041 IB_QPT_RESERVED6, 1042 IB_QPT_RESERVED7, 1043 IB_QPT_RESERVED8, 1044 IB_QPT_RESERVED9, 1045 IB_QPT_RESERVED10, 1046 }; 1047 1048 enum ib_qp_create_flags { 1049 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0, 1050 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1, 1051 IB_QP_CREATE_CROSS_CHANNEL = 1 << 2, 1052 IB_QP_CREATE_MANAGED_SEND = 1 << 3, 1053 IB_QP_CREATE_MANAGED_RECV = 1 << 4, 1054 IB_QP_CREATE_NETIF_QP = 1 << 5, 1055 IB_QP_CREATE_INTEGRITY_EN = 1 << 6, 1056 /* FREE = 1 << 7, */ 1057 IB_QP_CREATE_SCATTER_FCS = 1 << 8, 1058 IB_QP_CREATE_CVLAN_STRIPPING = 1 << 9, 1059 IB_QP_CREATE_SOURCE_QPN = 1 << 10, 1060 IB_QP_CREATE_PCI_WRITE_END_PADDING = 1 << 11, 1061 /* reserve bits 26-31 for low level drivers' internal use */ 1062 IB_QP_CREATE_RESERVED_START = 1 << 26, 1063 IB_QP_CREATE_RESERVED_END = 1 << 31, 1064 }; 1065 1066 /* 1067 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler 1068 * callback to destroy the passed in QP. 1069 */ 1070 1071 struct ib_qp_init_attr { 1072 /* Consumer's event_handler callback must not block */ 1073 void (*event_handler)(struct ib_event *, void *); 1074 1075 void *qp_context; 1076 struct ib_cq *send_cq; 1077 struct ib_cq *recv_cq; 1078 struct ib_srq *srq; 1079 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1080 struct ib_qp_cap cap; 1081 enum ib_sig_type sq_sig_type; 1082 enum ib_qp_type qp_type; 1083 u32 create_flags; 1084 1085 /* 1086 * Only needed for special QP types, or when using the RW API. 1087 */ 1088 u8 port_num; 1089 struct ib_rwq_ind_table *rwq_ind_tbl; 1090 u32 source_qpn; 1091 }; 1092 1093 struct ib_qp_open_attr { 1094 void (*event_handler)(struct ib_event *, void *); 1095 void *qp_context; 1096 u32 qp_num; 1097 enum ib_qp_type qp_type; 1098 }; 1099 1100 enum ib_rnr_timeout { 1101 IB_RNR_TIMER_655_36 = 0, 1102 IB_RNR_TIMER_000_01 = 1, 1103 IB_RNR_TIMER_000_02 = 2, 1104 IB_RNR_TIMER_000_03 = 3, 1105 IB_RNR_TIMER_000_04 = 4, 1106 IB_RNR_TIMER_000_06 = 5, 1107 IB_RNR_TIMER_000_08 = 6, 1108 IB_RNR_TIMER_000_12 = 7, 1109 IB_RNR_TIMER_000_16 = 8, 1110 IB_RNR_TIMER_000_24 = 9, 1111 IB_RNR_TIMER_000_32 = 10, 1112 IB_RNR_TIMER_000_48 = 11, 1113 IB_RNR_TIMER_000_64 = 12, 1114 IB_RNR_TIMER_000_96 = 13, 1115 IB_RNR_TIMER_001_28 = 14, 1116 IB_RNR_TIMER_001_92 = 15, 1117 IB_RNR_TIMER_002_56 = 16, 1118 IB_RNR_TIMER_003_84 = 17, 1119 IB_RNR_TIMER_005_12 = 18, 1120 IB_RNR_TIMER_007_68 = 19, 1121 IB_RNR_TIMER_010_24 = 20, 1122 IB_RNR_TIMER_015_36 = 21, 1123 IB_RNR_TIMER_020_48 = 22, 1124 IB_RNR_TIMER_030_72 = 23, 1125 IB_RNR_TIMER_040_96 = 24, 1126 IB_RNR_TIMER_061_44 = 25, 1127 IB_RNR_TIMER_081_92 = 26, 1128 IB_RNR_TIMER_122_88 = 27, 1129 IB_RNR_TIMER_163_84 = 28, 1130 IB_RNR_TIMER_245_76 = 29, 1131 IB_RNR_TIMER_327_68 = 30, 1132 IB_RNR_TIMER_491_52 = 31 1133 }; 1134 1135 enum ib_qp_attr_mask { 1136 IB_QP_STATE = 1, 1137 IB_QP_CUR_STATE = (1<<1), 1138 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2), 1139 IB_QP_ACCESS_FLAGS = (1<<3), 1140 IB_QP_PKEY_INDEX = (1<<4), 1141 IB_QP_PORT = (1<<5), 1142 IB_QP_QKEY = (1<<6), 1143 IB_QP_AV = (1<<7), 1144 IB_QP_PATH_MTU = (1<<8), 1145 IB_QP_TIMEOUT = (1<<9), 1146 IB_QP_RETRY_CNT = (1<<10), 1147 IB_QP_RNR_RETRY = (1<<11), 1148 IB_QP_RQ_PSN = (1<<12), 1149 IB_QP_MAX_QP_RD_ATOMIC = (1<<13), 1150 IB_QP_ALT_PATH = (1<<14), 1151 IB_QP_MIN_RNR_TIMER = (1<<15), 1152 IB_QP_SQ_PSN = (1<<16), 1153 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17), 1154 IB_QP_PATH_MIG_STATE = (1<<18), 1155 IB_QP_CAP = (1<<19), 1156 IB_QP_DEST_QPN = (1<<20), 1157 IB_QP_RESERVED1 = (1<<21), 1158 IB_QP_RESERVED2 = (1<<22), 1159 IB_QP_RESERVED3 = (1<<23), 1160 IB_QP_RESERVED4 = (1<<24), 1161 IB_QP_RATE_LIMIT = (1<<25), 1162 }; 1163 1164 enum ib_qp_state { 1165 IB_QPS_RESET, 1166 IB_QPS_INIT, 1167 IB_QPS_RTR, 1168 IB_QPS_RTS, 1169 IB_QPS_SQD, 1170 IB_QPS_SQE, 1171 IB_QPS_ERR 1172 }; 1173 1174 enum ib_mig_state { 1175 IB_MIG_MIGRATED, 1176 IB_MIG_REARM, 1177 IB_MIG_ARMED 1178 }; 1179 1180 enum ib_mw_type { 1181 IB_MW_TYPE_1 = 1, 1182 IB_MW_TYPE_2 = 2 1183 }; 1184 1185 struct ib_qp_attr { 1186 enum ib_qp_state qp_state; 1187 enum ib_qp_state cur_qp_state; 1188 enum ib_mtu path_mtu; 1189 enum ib_mig_state path_mig_state; 1190 u32 qkey; 1191 u32 rq_psn; 1192 u32 sq_psn; 1193 u32 dest_qp_num; 1194 int qp_access_flags; 1195 struct ib_qp_cap cap; 1196 struct rdma_ah_attr ah_attr; 1197 struct rdma_ah_attr alt_ah_attr; 1198 u16 pkey_index; 1199 u16 alt_pkey_index; 1200 u8 en_sqd_async_notify; 1201 u8 sq_draining; 1202 u8 max_rd_atomic; 1203 u8 max_dest_rd_atomic; 1204 u8 min_rnr_timer; 1205 u8 port_num; 1206 u8 timeout; 1207 u8 retry_cnt; 1208 u8 rnr_retry; 1209 u8 alt_port_num; 1210 u8 alt_timeout; 1211 u32 rate_limit; 1212 }; 1213 1214 enum ib_wr_opcode { 1215 /* These are shared with userspace */ 1216 IB_WR_RDMA_WRITE = IB_UVERBS_WR_RDMA_WRITE, 1217 IB_WR_RDMA_WRITE_WITH_IMM = IB_UVERBS_WR_RDMA_WRITE_WITH_IMM, 1218 IB_WR_SEND = IB_UVERBS_WR_SEND, 1219 IB_WR_SEND_WITH_IMM = IB_UVERBS_WR_SEND_WITH_IMM, 1220 IB_WR_RDMA_READ = IB_UVERBS_WR_RDMA_READ, 1221 IB_WR_ATOMIC_CMP_AND_SWP = IB_UVERBS_WR_ATOMIC_CMP_AND_SWP, 1222 IB_WR_ATOMIC_FETCH_AND_ADD = IB_UVERBS_WR_ATOMIC_FETCH_AND_ADD, 1223 IB_WR_LSO = IB_UVERBS_WR_TSO, 1224 IB_WR_SEND_WITH_INV = IB_UVERBS_WR_SEND_WITH_INV, 1225 IB_WR_RDMA_READ_WITH_INV = IB_UVERBS_WR_RDMA_READ_WITH_INV, 1226 IB_WR_LOCAL_INV = IB_UVERBS_WR_LOCAL_INV, 1227 IB_WR_MASKED_ATOMIC_CMP_AND_SWP = 1228 IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP, 1229 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD = 1230 IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD, 1231 1232 /* These are kernel only and can not be issued by userspace */ 1233 IB_WR_REG_MR = 0x20, 1234 IB_WR_REG_MR_INTEGRITY, 1235 1236 /* reserve values for low level drivers' internal use. 1237 * These values will not be used at all in the ib core layer. 1238 */ 1239 IB_WR_RESERVED1 = 0xf0, 1240 IB_WR_RESERVED2, 1241 IB_WR_RESERVED3, 1242 IB_WR_RESERVED4, 1243 IB_WR_RESERVED5, 1244 IB_WR_RESERVED6, 1245 IB_WR_RESERVED7, 1246 IB_WR_RESERVED8, 1247 IB_WR_RESERVED9, 1248 IB_WR_RESERVED10, 1249 }; 1250 1251 enum ib_send_flags { 1252 IB_SEND_FENCE = 1, 1253 IB_SEND_SIGNALED = (1<<1), 1254 IB_SEND_SOLICITED = (1<<2), 1255 IB_SEND_INLINE = (1<<3), 1256 IB_SEND_IP_CSUM = (1<<4), 1257 1258 /* reserve bits 26-31 for low level drivers' internal use */ 1259 IB_SEND_RESERVED_START = (1 << 26), 1260 IB_SEND_RESERVED_END = (1 << 31), 1261 }; 1262 1263 struct ib_sge { 1264 u64 addr; 1265 u32 length; 1266 u32 lkey; 1267 }; 1268 1269 struct ib_cqe { 1270 void (*done)(struct ib_cq *cq, struct ib_wc *wc); 1271 }; 1272 1273 struct ib_send_wr { 1274 struct ib_send_wr *next; 1275 union { 1276 u64 wr_id; 1277 struct ib_cqe *wr_cqe; 1278 }; 1279 struct ib_sge *sg_list; 1280 int num_sge; 1281 enum ib_wr_opcode opcode; 1282 int send_flags; 1283 union { 1284 __be32 imm_data; 1285 u32 invalidate_rkey; 1286 } ex; 1287 }; 1288 1289 struct ib_rdma_wr { 1290 struct ib_send_wr wr; 1291 u64 remote_addr; 1292 u32 rkey; 1293 }; 1294 1295 static inline const struct ib_rdma_wr *rdma_wr(const struct ib_send_wr *wr) 1296 { 1297 return container_of(wr, struct ib_rdma_wr, wr); 1298 } 1299 1300 struct ib_atomic_wr { 1301 struct ib_send_wr wr; 1302 u64 remote_addr; 1303 u64 compare_add; 1304 u64 swap; 1305 u64 compare_add_mask; 1306 u64 swap_mask; 1307 u32 rkey; 1308 }; 1309 1310 static inline const struct ib_atomic_wr *atomic_wr(const struct ib_send_wr *wr) 1311 { 1312 return container_of(wr, struct ib_atomic_wr, wr); 1313 } 1314 1315 struct ib_ud_wr { 1316 struct ib_send_wr wr; 1317 struct ib_ah *ah; 1318 void *header; 1319 int hlen; 1320 int mss; 1321 u32 remote_qpn; 1322 u32 remote_qkey; 1323 u16 pkey_index; /* valid for GSI only */ 1324 u8 port_num; /* valid for DR SMPs on switch only */ 1325 }; 1326 1327 static inline const struct ib_ud_wr *ud_wr(const struct ib_send_wr *wr) 1328 { 1329 return container_of(wr, struct ib_ud_wr, wr); 1330 } 1331 1332 struct ib_reg_wr { 1333 struct ib_send_wr wr; 1334 struct ib_mr *mr; 1335 u32 key; 1336 int access; 1337 }; 1338 1339 static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr) 1340 { 1341 return container_of(wr, struct ib_reg_wr, wr); 1342 } 1343 1344 struct ib_recv_wr { 1345 struct ib_recv_wr *next; 1346 union { 1347 u64 wr_id; 1348 struct ib_cqe *wr_cqe; 1349 }; 1350 struct ib_sge *sg_list; 1351 int num_sge; 1352 }; 1353 1354 enum ib_access_flags { 1355 IB_ACCESS_LOCAL_WRITE = IB_UVERBS_ACCESS_LOCAL_WRITE, 1356 IB_ACCESS_REMOTE_WRITE = IB_UVERBS_ACCESS_REMOTE_WRITE, 1357 IB_ACCESS_REMOTE_READ = IB_UVERBS_ACCESS_REMOTE_READ, 1358 IB_ACCESS_REMOTE_ATOMIC = IB_UVERBS_ACCESS_REMOTE_ATOMIC, 1359 IB_ACCESS_MW_BIND = IB_UVERBS_ACCESS_MW_BIND, 1360 IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED, 1361 IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND, 1362 IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB, 1363 1364 IB_ACCESS_SUPPORTED = ((IB_ACCESS_HUGETLB << 1) - 1) 1365 }; 1366 1367 /* 1368 * XXX: these are apparently used for ->rereg_user_mr, no idea why they 1369 * are hidden here instead of a uapi header! 1370 */ 1371 enum ib_mr_rereg_flags { 1372 IB_MR_REREG_TRANS = 1, 1373 IB_MR_REREG_PD = (1<<1), 1374 IB_MR_REREG_ACCESS = (1<<2), 1375 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1) 1376 }; 1377 1378 struct ib_fmr_attr { 1379 int max_pages; 1380 int max_maps; 1381 u8 page_shift; 1382 }; 1383 1384 struct ib_umem; 1385 1386 enum rdma_remove_reason { 1387 /* 1388 * Userspace requested uobject deletion or initial try 1389 * to remove uobject via cleanup. Call could fail 1390 */ 1391 RDMA_REMOVE_DESTROY, 1392 /* Context deletion. This call should delete the actual object itself */ 1393 RDMA_REMOVE_CLOSE, 1394 /* Driver is being hot-unplugged. This call should delete the actual object itself */ 1395 RDMA_REMOVE_DRIVER_REMOVE, 1396 /* uobj is being cleaned-up before being committed */ 1397 RDMA_REMOVE_ABORT, 1398 }; 1399 1400 struct ib_rdmacg_object { 1401 #ifdef CONFIG_CGROUP_RDMA 1402 struct rdma_cgroup *cg; /* owner rdma cgroup */ 1403 #endif 1404 }; 1405 1406 struct ib_ucontext { 1407 struct ib_device *device; 1408 struct ib_uverbs_file *ufile; 1409 /* 1410 * 'closing' can be read by the driver only during a destroy callback, 1411 * it is set when we are closing the file descriptor and indicates 1412 * that mm_sem may be locked. 1413 */ 1414 bool closing; 1415 1416 bool cleanup_retryable; 1417 1418 void (*invalidate_range)(struct ib_umem_odp *umem_odp, 1419 unsigned long start, unsigned long end); 1420 struct mutex per_mm_list_lock; 1421 struct list_head per_mm_list; 1422 1423 struct ib_rdmacg_object cg_obj; 1424 /* 1425 * Implementation details of the RDMA core, don't use in drivers: 1426 */ 1427 struct rdma_restrack_entry res; 1428 }; 1429 1430 struct ib_uobject { 1431 u64 user_handle; /* handle given to us by userspace */ 1432 /* ufile & ucontext owning this object */ 1433 struct ib_uverbs_file *ufile; 1434 /* FIXME, save memory: ufile->context == context */ 1435 struct ib_ucontext *context; /* associated user context */ 1436 void *object; /* containing object */ 1437 struct list_head list; /* link to context's list */ 1438 struct ib_rdmacg_object cg_obj; /* rdmacg object */ 1439 int id; /* index into kernel idr */ 1440 struct kref ref; 1441 atomic_t usecnt; /* protects exclusive access */ 1442 struct rcu_head rcu; /* kfree_rcu() overhead */ 1443 1444 const struct uverbs_api_object *uapi_object; 1445 }; 1446 1447 struct ib_udata { 1448 const void __user *inbuf; 1449 void __user *outbuf; 1450 size_t inlen; 1451 size_t outlen; 1452 }; 1453 1454 struct ib_pd { 1455 u32 local_dma_lkey; 1456 u32 flags; 1457 struct ib_device *device; 1458 struct ib_uobject *uobject; 1459 atomic_t usecnt; /* count all resources */ 1460 1461 u32 unsafe_global_rkey; 1462 1463 /* 1464 * Implementation details of the RDMA core, don't use in drivers: 1465 */ 1466 struct ib_mr *__internal_mr; 1467 struct rdma_restrack_entry res; 1468 }; 1469 1470 struct ib_xrcd { 1471 struct ib_device *device; 1472 atomic_t usecnt; /* count all exposed resources */ 1473 struct inode *inode; 1474 1475 struct mutex tgt_qp_mutex; 1476 struct list_head tgt_qp_list; 1477 }; 1478 1479 struct ib_ah { 1480 struct ib_device *device; 1481 struct ib_pd *pd; 1482 struct ib_uobject *uobject; 1483 const struct ib_gid_attr *sgid_attr; 1484 enum rdma_ah_attr_type type; 1485 }; 1486 1487 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context); 1488 1489 enum ib_poll_context { 1490 IB_POLL_DIRECT, /* caller context, no hw completions */ 1491 IB_POLL_SOFTIRQ, /* poll from softirq context */ 1492 IB_POLL_WORKQUEUE, /* poll from workqueue */ 1493 IB_POLL_UNBOUND_WORKQUEUE, /* poll from unbound workqueue */ 1494 }; 1495 1496 struct ib_cq { 1497 struct ib_device *device; 1498 struct ib_uobject *uobject; 1499 ib_comp_handler comp_handler; 1500 void (*event_handler)(struct ib_event *, void *); 1501 void *cq_context; 1502 int cqe; 1503 atomic_t usecnt; /* count number of work queues */ 1504 enum ib_poll_context poll_ctx; 1505 struct ib_wc *wc; 1506 union { 1507 struct irq_poll iop; 1508 struct work_struct work; 1509 }; 1510 struct workqueue_struct *comp_wq; 1511 /* 1512 * Implementation details of the RDMA core, don't use in drivers: 1513 */ 1514 struct rdma_restrack_entry res; 1515 }; 1516 1517 struct ib_srq { 1518 struct ib_device *device; 1519 struct ib_pd *pd; 1520 struct ib_uobject *uobject; 1521 void (*event_handler)(struct ib_event *, void *); 1522 void *srq_context; 1523 enum ib_srq_type srq_type; 1524 atomic_t usecnt; 1525 1526 struct { 1527 struct ib_cq *cq; 1528 union { 1529 struct { 1530 struct ib_xrcd *xrcd; 1531 u32 srq_num; 1532 } xrc; 1533 }; 1534 } ext; 1535 }; 1536 1537 enum ib_raw_packet_caps { 1538 /* Strip cvlan from incoming packet and report it in the matching work 1539 * completion is supported. 1540 */ 1541 IB_RAW_PACKET_CAP_CVLAN_STRIPPING = (1 << 0), 1542 /* Scatter FCS field of an incoming packet to host memory is supported. 1543 */ 1544 IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1), 1545 /* Checksum offloads are supported (for both send and receive). */ 1546 IB_RAW_PACKET_CAP_IP_CSUM = (1 << 2), 1547 /* When a packet is received for an RQ with no receive WQEs, the 1548 * packet processing is delayed. 1549 */ 1550 IB_RAW_PACKET_CAP_DELAY_DROP = (1 << 3), 1551 }; 1552 1553 enum ib_wq_type { 1554 IB_WQT_RQ 1555 }; 1556 1557 enum ib_wq_state { 1558 IB_WQS_RESET, 1559 IB_WQS_RDY, 1560 IB_WQS_ERR 1561 }; 1562 1563 struct ib_wq { 1564 struct ib_device *device; 1565 struct ib_uobject *uobject; 1566 void *wq_context; 1567 void (*event_handler)(struct ib_event *, void *); 1568 struct ib_pd *pd; 1569 struct ib_cq *cq; 1570 u32 wq_num; 1571 enum ib_wq_state state; 1572 enum ib_wq_type wq_type; 1573 atomic_t usecnt; 1574 }; 1575 1576 enum ib_wq_flags { 1577 IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0, 1578 IB_WQ_FLAGS_SCATTER_FCS = 1 << 1, 1579 IB_WQ_FLAGS_DELAY_DROP = 1 << 2, 1580 IB_WQ_FLAGS_PCI_WRITE_END_PADDING = 1 << 3, 1581 }; 1582 1583 struct ib_wq_init_attr { 1584 void *wq_context; 1585 enum ib_wq_type wq_type; 1586 u32 max_wr; 1587 u32 max_sge; 1588 struct ib_cq *cq; 1589 void (*event_handler)(struct ib_event *, void *); 1590 u32 create_flags; /* Use enum ib_wq_flags */ 1591 }; 1592 1593 enum ib_wq_attr_mask { 1594 IB_WQ_STATE = 1 << 0, 1595 IB_WQ_CUR_STATE = 1 << 1, 1596 IB_WQ_FLAGS = 1 << 2, 1597 }; 1598 1599 struct ib_wq_attr { 1600 enum ib_wq_state wq_state; 1601 enum ib_wq_state curr_wq_state; 1602 u32 flags; /* Use enum ib_wq_flags */ 1603 u32 flags_mask; /* Use enum ib_wq_flags */ 1604 }; 1605 1606 struct ib_rwq_ind_table { 1607 struct ib_device *device; 1608 struct ib_uobject *uobject; 1609 atomic_t usecnt; 1610 u32 ind_tbl_num; 1611 u32 log_ind_tbl_size; 1612 struct ib_wq **ind_tbl; 1613 }; 1614 1615 struct ib_rwq_ind_table_init_attr { 1616 u32 log_ind_tbl_size; 1617 /* Each entry is a pointer to Receive Work Queue */ 1618 struct ib_wq **ind_tbl; 1619 }; 1620 1621 enum port_pkey_state { 1622 IB_PORT_PKEY_NOT_VALID = 0, 1623 IB_PORT_PKEY_VALID = 1, 1624 IB_PORT_PKEY_LISTED = 2, 1625 }; 1626 1627 struct ib_qp_security; 1628 1629 struct ib_port_pkey { 1630 enum port_pkey_state state; 1631 u16 pkey_index; 1632 u8 port_num; 1633 struct list_head qp_list; 1634 struct list_head to_error_list; 1635 struct ib_qp_security *sec; 1636 }; 1637 1638 struct ib_ports_pkeys { 1639 struct ib_port_pkey main; 1640 struct ib_port_pkey alt; 1641 }; 1642 1643 struct ib_qp_security { 1644 struct ib_qp *qp; 1645 struct ib_device *dev; 1646 /* Hold this mutex when changing port and pkey settings. */ 1647 struct mutex mutex; 1648 struct ib_ports_pkeys *ports_pkeys; 1649 /* A list of all open shared QP handles. Required to enforce security 1650 * properly for all users of a shared QP. 1651 */ 1652 struct list_head shared_qp_list; 1653 void *security; 1654 bool destroying; 1655 atomic_t error_list_count; 1656 struct completion error_complete; 1657 int error_comps_pending; 1658 }; 1659 1660 /* 1661 * @max_write_sge: Maximum SGE elements per RDMA WRITE request. 1662 * @max_read_sge: Maximum SGE elements per RDMA READ request. 1663 */ 1664 struct ib_qp { 1665 struct ib_device *device; 1666 struct ib_pd *pd; 1667 struct ib_cq *send_cq; 1668 struct ib_cq *recv_cq; 1669 spinlock_t mr_lock; 1670 int mrs_used; 1671 struct list_head rdma_mrs; 1672 struct list_head sig_mrs; 1673 struct ib_srq *srq; 1674 struct ib_xrcd *xrcd; /* XRC TGT QPs only */ 1675 struct list_head xrcd_list; 1676 1677 /* count times opened, mcast attaches, flow attaches */ 1678 atomic_t usecnt; 1679 struct list_head open_list; 1680 struct ib_qp *real_qp; 1681 struct ib_uobject *uobject; 1682 void (*event_handler)(struct ib_event *, void *); 1683 void *qp_context; 1684 /* sgid_attrs associated with the AV's */ 1685 const struct ib_gid_attr *av_sgid_attr; 1686 const struct ib_gid_attr *alt_path_sgid_attr; 1687 u32 qp_num; 1688 u32 max_write_sge; 1689 u32 max_read_sge; 1690 enum ib_qp_type qp_type; 1691 struct ib_rwq_ind_table *rwq_ind_tbl; 1692 struct ib_qp_security *qp_sec; 1693 u8 port; 1694 1695 bool integrity_en; 1696 /* 1697 * Implementation details of the RDMA core, don't use in drivers: 1698 */ 1699 struct rdma_restrack_entry res; 1700 }; 1701 1702 struct ib_dm { 1703 struct ib_device *device; 1704 u32 length; 1705 u32 flags; 1706 struct ib_uobject *uobject; 1707 atomic_t usecnt; 1708 }; 1709 1710 struct ib_mr { 1711 struct ib_device *device; 1712 struct ib_pd *pd; 1713 u32 lkey; 1714 u32 rkey; 1715 u64 iova; 1716 u64 length; 1717 unsigned int page_size; 1718 enum ib_mr_type type; 1719 bool need_inval; 1720 union { 1721 struct ib_uobject *uobject; /* user */ 1722 struct list_head qp_entry; /* FR */ 1723 }; 1724 1725 struct ib_dm *dm; 1726 struct ib_sig_attrs *sig_attrs; /* only for IB_MR_TYPE_INTEGRITY MRs */ 1727 /* 1728 * Implementation details of the RDMA core, don't use in drivers: 1729 */ 1730 struct rdma_restrack_entry res; 1731 }; 1732 1733 struct ib_mw { 1734 struct ib_device *device; 1735 struct ib_pd *pd; 1736 struct ib_uobject *uobject; 1737 u32 rkey; 1738 enum ib_mw_type type; 1739 }; 1740 1741 struct ib_fmr { 1742 struct ib_device *device; 1743 struct ib_pd *pd; 1744 struct list_head list; 1745 u32 lkey; 1746 u32 rkey; 1747 }; 1748 1749 /* Supported steering options */ 1750 enum ib_flow_attr_type { 1751 /* steering according to rule specifications */ 1752 IB_FLOW_ATTR_NORMAL = 0x0, 1753 /* default unicast and multicast rule - 1754 * receive all Eth traffic which isn't steered to any QP 1755 */ 1756 IB_FLOW_ATTR_ALL_DEFAULT = 0x1, 1757 /* default multicast rule - 1758 * receive all Eth multicast traffic which isn't steered to any QP 1759 */ 1760 IB_FLOW_ATTR_MC_DEFAULT = 0x2, 1761 /* sniffer rule - receive all port traffic */ 1762 IB_FLOW_ATTR_SNIFFER = 0x3 1763 }; 1764 1765 /* Supported steering header types */ 1766 enum ib_flow_spec_type { 1767 /* L2 headers*/ 1768 IB_FLOW_SPEC_ETH = 0x20, 1769 IB_FLOW_SPEC_IB = 0x22, 1770 /* L3 header*/ 1771 IB_FLOW_SPEC_IPV4 = 0x30, 1772 IB_FLOW_SPEC_IPV6 = 0x31, 1773 IB_FLOW_SPEC_ESP = 0x34, 1774 /* L4 headers*/ 1775 IB_FLOW_SPEC_TCP = 0x40, 1776 IB_FLOW_SPEC_UDP = 0x41, 1777 IB_FLOW_SPEC_VXLAN_TUNNEL = 0x50, 1778 IB_FLOW_SPEC_GRE = 0x51, 1779 IB_FLOW_SPEC_MPLS = 0x60, 1780 IB_FLOW_SPEC_INNER = 0x100, 1781 /* Actions */ 1782 IB_FLOW_SPEC_ACTION_TAG = 0x1000, 1783 IB_FLOW_SPEC_ACTION_DROP = 0x1001, 1784 IB_FLOW_SPEC_ACTION_HANDLE = 0x1002, 1785 IB_FLOW_SPEC_ACTION_COUNT = 0x1003, 1786 }; 1787 #define IB_FLOW_SPEC_LAYER_MASK 0xF0 1788 #define IB_FLOW_SPEC_SUPPORT_LAYERS 10 1789 1790 /* Flow steering rule priority is set according to it's domain. 1791 * Lower domain value means higher priority. 1792 */ 1793 enum ib_flow_domain { 1794 IB_FLOW_DOMAIN_USER, 1795 IB_FLOW_DOMAIN_ETHTOOL, 1796 IB_FLOW_DOMAIN_RFS, 1797 IB_FLOW_DOMAIN_NIC, 1798 IB_FLOW_DOMAIN_NUM /* Must be last */ 1799 }; 1800 1801 enum ib_flow_flags { 1802 IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */ 1803 IB_FLOW_ATTR_FLAGS_EGRESS = 1UL << 2, /* Egress flow */ 1804 IB_FLOW_ATTR_FLAGS_RESERVED = 1UL << 3 /* Must be last */ 1805 }; 1806 1807 struct ib_flow_eth_filter { 1808 u8 dst_mac[6]; 1809 u8 src_mac[6]; 1810 __be16 ether_type; 1811 __be16 vlan_tag; 1812 /* Must be last */ 1813 u8 real_sz[0]; 1814 }; 1815 1816 struct ib_flow_spec_eth { 1817 u32 type; 1818 u16 size; 1819 struct ib_flow_eth_filter val; 1820 struct ib_flow_eth_filter mask; 1821 }; 1822 1823 struct ib_flow_ib_filter { 1824 __be16 dlid; 1825 __u8 sl; 1826 /* Must be last */ 1827 u8 real_sz[0]; 1828 }; 1829 1830 struct ib_flow_spec_ib { 1831 u32 type; 1832 u16 size; 1833 struct ib_flow_ib_filter val; 1834 struct ib_flow_ib_filter mask; 1835 }; 1836 1837 /* IPv4 header flags */ 1838 enum ib_ipv4_flags { 1839 IB_IPV4_DONT_FRAG = 0x2, /* Don't enable packet fragmentation */ 1840 IB_IPV4_MORE_FRAG = 0X4 /* For All fragmented packets except the 1841 last have this flag set */ 1842 }; 1843 1844 struct ib_flow_ipv4_filter { 1845 __be32 src_ip; 1846 __be32 dst_ip; 1847 u8 proto; 1848 u8 tos; 1849 u8 ttl; 1850 u8 flags; 1851 /* Must be last */ 1852 u8 real_sz[0]; 1853 }; 1854 1855 struct ib_flow_spec_ipv4 { 1856 u32 type; 1857 u16 size; 1858 struct ib_flow_ipv4_filter val; 1859 struct ib_flow_ipv4_filter mask; 1860 }; 1861 1862 struct ib_flow_ipv6_filter { 1863 u8 src_ip[16]; 1864 u8 dst_ip[16]; 1865 __be32 flow_label; 1866 u8 next_hdr; 1867 u8 traffic_class; 1868 u8 hop_limit; 1869 /* Must be last */ 1870 u8 real_sz[0]; 1871 }; 1872 1873 struct ib_flow_spec_ipv6 { 1874 u32 type; 1875 u16 size; 1876 struct ib_flow_ipv6_filter val; 1877 struct ib_flow_ipv6_filter mask; 1878 }; 1879 1880 struct ib_flow_tcp_udp_filter { 1881 __be16 dst_port; 1882 __be16 src_port; 1883 /* Must be last */ 1884 u8 real_sz[0]; 1885 }; 1886 1887 struct ib_flow_spec_tcp_udp { 1888 u32 type; 1889 u16 size; 1890 struct ib_flow_tcp_udp_filter val; 1891 struct ib_flow_tcp_udp_filter mask; 1892 }; 1893 1894 struct ib_flow_tunnel_filter { 1895 __be32 tunnel_id; 1896 u8 real_sz[0]; 1897 }; 1898 1899 /* ib_flow_spec_tunnel describes the Vxlan tunnel 1900 * the tunnel_id from val has the vni value 1901 */ 1902 struct ib_flow_spec_tunnel { 1903 u32 type; 1904 u16 size; 1905 struct ib_flow_tunnel_filter val; 1906 struct ib_flow_tunnel_filter mask; 1907 }; 1908 1909 struct ib_flow_esp_filter { 1910 __be32 spi; 1911 __be32 seq; 1912 /* Must be last */ 1913 u8 real_sz[0]; 1914 }; 1915 1916 struct ib_flow_spec_esp { 1917 u32 type; 1918 u16 size; 1919 struct ib_flow_esp_filter val; 1920 struct ib_flow_esp_filter mask; 1921 }; 1922 1923 struct ib_flow_gre_filter { 1924 __be16 c_ks_res0_ver; 1925 __be16 protocol; 1926 __be32 key; 1927 /* Must be last */ 1928 u8 real_sz[0]; 1929 }; 1930 1931 struct ib_flow_spec_gre { 1932 u32 type; 1933 u16 size; 1934 struct ib_flow_gre_filter val; 1935 struct ib_flow_gre_filter mask; 1936 }; 1937 1938 struct ib_flow_mpls_filter { 1939 __be32 tag; 1940 /* Must be last */ 1941 u8 real_sz[0]; 1942 }; 1943 1944 struct ib_flow_spec_mpls { 1945 u32 type; 1946 u16 size; 1947 struct ib_flow_mpls_filter val; 1948 struct ib_flow_mpls_filter mask; 1949 }; 1950 1951 struct ib_flow_spec_action_tag { 1952 enum ib_flow_spec_type type; 1953 u16 size; 1954 u32 tag_id; 1955 }; 1956 1957 struct ib_flow_spec_action_drop { 1958 enum ib_flow_spec_type type; 1959 u16 size; 1960 }; 1961 1962 struct ib_flow_spec_action_handle { 1963 enum ib_flow_spec_type type; 1964 u16 size; 1965 struct ib_flow_action *act; 1966 }; 1967 1968 enum ib_counters_description { 1969 IB_COUNTER_PACKETS, 1970 IB_COUNTER_BYTES, 1971 }; 1972 1973 struct ib_flow_spec_action_count { 1974 enum ib_flow_spec_type type; 1975 u16 size; 1976 struct ib_counters *counters; 1977 }; 1978 1979 union ib_flow_spec { 1980 struct { 1981 u32 type; 1982 u16 size; 1983 }; 1984 struct ib_flow_spec_eth eth; 1985 struct ib_flow_spec_ib ib; 1986 struct ib_flow_spec_ipv4 ipv4; 1987 struct ib_flow_spec_tcp_udp tcp_udp; 1988 struct ib_flow_spec_ipv6 ipv6; 1989 struct ib_flow_spec_tunnel tunnel; 1990 struct ib_flow_spec_esp esp; 1991 struct ib_flow_spec_gre gre; 1992 struct ib_flow_spec_mpls mpls; 1993 struct ib_flow_spec_action_tag flow_tag; 1994 struct ib_flow_spec_action_drop drop; 1995 struct ib_flow_spec_action_handle action; 1996 struct ib_flow_spec_action_count flow_count; 1997 }; 1998 1999 struct ib_flow_attr { 2000 enum ib_flow_attr_type type; 2001 u16 size; 2002 u16 priority; 2003 u32 flags; 2004 u8 num_of_specs; 2005 u8 port; 2006 union ib_flow_spec flows[]; 2007 }; 2008 2009 struct ib_flow { 2010 struct ib_qp *qp; 2011 struct ib_device *device; 2012 struct ib_uobject *uobject; 2013 }; 2014 2015 enum ib_flow_action_type { 2016 IB_FLOW_ACTION_UNSPECIFIED, 2017 IB_FLOW_ACTION_ESP = 1, 2018 }; 2019 2020 struct ib_flow_action_attrs_esp_keymats { 2021 enum ib_uverbs_flow_action_esp_keymat protocol; 2022 union { 2023 struct ib_uverbs_flow_action_esp_keymat_aes_gcm aes_gcm; 2024 } keymat; 2025 }; 2026 2027 struct ib_flow_action_attrs_esp_replays { 2028 enum ib_uverbs_flow_action_esp_replay protocol; 2029 union { 2030 struct ib_uverbs_flow_action_esp_replay_bmp bmp; 2031 } replay; 2032 }; 2033 2034 enum ib_flow_action_attrs_esp_flags { 2035 /* All user-space flags at the top: Use enum ib_uverbs_flow_action_esp_flags 2036 * This is done in order to share the same flags between user-space and 2037 * kernel and spare an unnecessary translation. 2038 */ 2039 2040 /* Kernel flags */ 2041 IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED = 1ULL << 32, 2042 IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS = 1ULL << 33, 2043 }; 2044 2045 struct ib_flow_spec_list { 2046 struct ib_flow_spec_list *next; 2047 union ib_flow_spec spec; 2048 }; 2049 2050 struct ib_flow_action_attrs_esp { 2051 struct ib_flow_action_attrs_esp_keymats *keymat; 2052 struct ib_flow_action_attrs_esp_replays *replay; 2053 struct ib_flow_spec_list *encap; 2054 /* Used only if IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED is enabled. 2055 * Value of 0 is a valid value. 2056 */ 2057 u32 esn; 2058 u32 spi; 2059 u32 seq; 2060 u32 tfc_pad; 2061 /* Use enum ib_flow_action_attrs_esp_flags */ 2062 u64 flags; 2063 u64 hard_limit_pkts; 2064 }; 2065 2066 struct ib_flow_action { 2067 struct ib_device *device; 2068 struct ib_uobject *uobject; 2069 enum ib_flow_action_type type; 2070 atomic_t usecnt; 2071 }; 2072 2073 struct ib_mad_hdr; 2074 struct ib_grh; 2075 2076 enum ib_process_mad_flags { 2077 IB_MAD_IGNORE_MKEY = 1, 2078 IB_MAD_IGNORE_BKEY = 2, 2079 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY 2080 }; 2081 2082 enum ib_mad_result { 2083 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */ 2084 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */ 2085 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */ 2086 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */ 2087 }; 2088 2089 struct ib_port_cache { 2090 u64 subnet_prefix; 2091 struct ib_pkey_cache *pkey; 2092 struct ib_gid_table *gid; 2093 u8 lmc; 2094 enum ib_port_state port_state; 2095 }; 2096 2097 struct ib_cache { 2098 rwlock_t lock; 2099 struct ib_event_handler event_handler; 2100 }; 2101 2102 struct ib_port_immutable { 2103 int pkey_tbl_len; 2104 int gid_tbl_len; 2105 u32 core_cap_flags; 2106 u32 max_mad_size; 2107 }; 2108 2109 struct ib_port_data { 2110 struct ib_device *ib_dev; 2111 2112 struct ib_port_immutable immutable; 2113 2114 spinlock_t pkey_list_lock; 2115 struct list_head pkey_list; 2116 2117 struct ib_port_cache cache; 2118 2119 spinlock_t netdev_lock; 2120 struct net_device __rcu *netdev; 2121 struct hlist_node ndev_hash_link; 2122 }; 2123 2124 /* rdma netdev type - specifies protocol type */ 2125 enum rdma_netdev_t { 2126 RDMA_NETDEV_OPA_VNIC, 2127 RDMA_NETDEV_IPOIB, 2128 }; 2129 2130 /** 2131 * struct rdma_netdev - rdma netdev 2132 * For cases where netstack interfacing is required. 2133 */ 2134 struct rdma_netdev { 2135 void *clnt_priv; 2136 struct ib_device *hca; 2137 u8 port_num; 2138 2139 /* 2140 * cleanup function must be specified. 2141 * FIXME: This is only used for OPA_VNIC and that usage should be 2142 * removed too. 2143 */ 2144 void (*free_rdma_netdev)(struct net_device *netdev); 2145 2146 /* control functions */ 2147 void (*set_id)(struct net_device *netdev, int id); 2148 /* send packet */ 2149 int (*send)(struct net_device *dev, struct sk_buff *skb, 2150 struct ib_ah *address, u32 dqpn); 2151 /* multicast */ 2152 int (*attach_mcast)(struct net_device *dev, struct ib_device *hca, 2153 union ib_gid *gid, u16 mlid, 2154 int set_qkey, u32 qkey); 2155 int (*detach_mcast)(struct net_device *dev, struct ib_device *hca, 2156 union ib_gid *gid, u16 mlid); 2157 }; 2158 2159 struct rdma_netdev_alloc_params { 2160 size_t sizeof_priv; 2161 unsigned int txqs; 2162 unsigned int rxqs; 2163 void *param; 2164 2165 int (*initialize_rdma_netdev)(struct ib_device *device, u8 port_num, 2166 struct net_device *netdev, void *param); 2167 }; 2168 2169 struct ib_counters { 2170 struct ib_device *device; 2171 struct ib_uobject *uobject; 2172 /* num of objects attached */ 2173 atomic_t usecnt; 2174 }; 2175 2176 struct ib_counters_read_attr { 2177 u64 *counters_buff; 2178 u32 ncounters; 2179 u32 flags; /* use enum ib_read_counters_flags */ 2180 }; 2181 2182 struct uverbs_attr_bundle; 2183 struct iw_cm_id; 2184 struct iw_cm_conn_param; 2185 2186 #define INIT_RDMA_OBJ_SIZE(ib_struct, drv_struct, member) \ 2187 .size_##ib_struct = \ 2188 (sizeof(struct drv_struct) + \ 2189 BUILD_BUG_ON_ZERO(offsetof(struct drv_struct, member)) + \ 2190 BUILD_BUG_ON_ZERO( \ 2191 !__same_type(((struct drv_struct *)NULL)->member, \ 2192 struct ib_struct))) 2193 2194 #define rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, gfp) \ 2195 ((struct ib_type *)kzalloc(ib_dev->ops.size_##ib_type, gfp)) 2196 2197 #define rdma_zalloc_drv_obj(ib_dev, ib_type) \ 2198 rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, GFP_KERNEL) 2199 2200 #define DECLARE_RDMA_OBJ_SIZE(ib_struct) size_t size_##ib_struct 2201 2202 /** 2203 * struct ib_device_ops - InfiniBand device operations 2204 * This structure defines all the InfiniBand device operations, providers will 2205 * need to define the supported operations, otherwise they will be set to null. 2206 */ 2207 struct ib_device_ops { 2208 struct module *owner; 2209 enum rdma_driver_id driver_id; 2210 u32 uverbs_abi_ver; 2211 unsigned int uverbs_no_driver_id_binding:1; 2212 2213 int (*post_send)(struct ib_qp *qp, const struct ib_send_wr *send_wr, 2214 const struct ib_send_wr **bad_send_wr); 2215 int (*post_recv)(struct ib_qp *qp, const struct ib_recv_wr *recv_wr, 2216 const struct ib_recv_wr **bad_recv_wr); 2217 void (*drain_rq)(struct ib_qp *qp); 2218 void (*drain_sq)(struct ib_qp *qp); 2219 int (*poll_cq)(struct ib_cq *cq, int num_entries, struct ib_wc *wc); 2220 int (*peek_cq)(struct ib_cq *cq, int wc_cnt); 2221 int (*req_notify_cq)(struct ib_cq *cq, enum ib_cq_notify_flags flags); 2222 int (*req_ncomp_notif)(struct ib_cq *cq, int wc_cnt); 2223 int (*post_srq_recv)(struct ib_srq *srq, 2224 const struct ib_recv_wr *recv_wr, 2225 const struct ib_recv_wr **bad_recv_wr); 2226 int (*process_mad)(struct ib_device *device, int process_mad_flags, 2227 u8 port_num, const struct ib_wc *in_wc, 2228 const struct ib_grh *in_grh, 2229 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 2230 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 2231 u16 *out_mad_pkey_index); 2232 int (*query_device)(struct ib_device *device, 2233 struct ib_device_attr *device_attr, 2234 struct ib_udata *udata); 2235 int (*modify_device)(struct ib_device *device, int device_modify_mask, 2236 struct ib_device_modify *device_modify); 2237 void (*get_dev_fw_str)(struct ib_device *device, char *str); 2238 const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev, 2239 int comp_vector); 2240 int (*query_port)(struct ib_device *device, u8 port_num, 2241 struct ib_port_attr *port_attr); 2242 int (*modify_port)(struct ib_device *device, u8 port_num, 2243 int port_modify_mask, 2244 struct ib_port_modify *port_modify); 2245 /** 2246 * The following mandatory functions are used only at device 2247 * registration. Keep functions such as these at the end of this 2248 * structure to avoid cache line misses when accessing struct ib_device 2249 * in fast paths. 2250 */ 2251 int (*get_port_immutable)(struct ib_device *device, u8 port_num, 2252 struct ib_port_immutable *immutable); 2253 enum rdma_link_layer (*get_link_layer)(struct ib_device *device, 2254 u8 port_num); 2255 /** 2256 * When calling get_netdev, the HW vendor's driver should return the 2257 * net device of device @device at port @port_num or NULL if such 2258 * a net device doesn't exist. The vendor driver should call dev_hold 2259 * on this net device. The HW vendor's device driver must guarantee 2260 * that this function returns NULL before the net device has finished 2261 * NETDEV_UNREGISTER state. 2262 */ 2263 struct net_device *(*get_netdev)(struct ib_device *device, u8 port_num); 2264 /** 2265 * rdma netdev operation 2266 * 2267 * Driver implementing alloc_rdma_netdev or rdma_netdev_get_params 2268 * must return -EOPNOTSUPP if it doesn't support the specified type. 2269 */ 2270 struct net_device *(*alloc_rdma_netdev)( 2271 struct ib_device *device, u8 port_num, enum rdma_netdev_t type, 2272 const char *name, unsigned char name_assign_type, 2273 void (*setup)(struct net_device *)); 2274 2275 int (*rdma_netdev_get_params)(struct ib_device *device, u8 port_num, 2276 enum rdma_netdev_t type, 2277 struct rdma_netdev_alloc_params *params); 2278 /** 2279 * query_gid should be return GID value for @device, when @port_num 2280 * link layer is either IB or iWarp. It is no-op if @port_num port 2281 * is RoCE link layer. 2282 */ 2283 int (*query_gid)(struct ib_device *device, u8 port_num, int index, 2284 union ib_gid *gid); 2285 /** 2286 * When calling add_gid, the HW vendor's driver should add the gid 2287 * of device of port at gid index available at @attr. Meta-info of 2288 * that gid (for example, the network device related to this gid) is 2289 * available at @attr. @context allows the HW vendor driver to store 2290 * extra information together with a GID entry. The HW vendor driver may 2291 * allocate memory to contain this information and store it in @context 2292 * when a new GID entry is written to. Params are consistent until the 2293 * next call of add_gid or delete_gid. The function should return 0 on 2294 * success or error otherwise. The function could be called 2295 * concurrently for different ports. This function is only called when 2296 * roce_gid_table is used. 2297 */ 2298 int (*add_gid)(const struct ib_gid_attr *attr, void **context); 2299 /** 2300 * When calling del_gid, the HW vendor's driver should delete the 2301 * gid of device @device at gid index gid_index of port port_num 2302 * available in @attr. 2303 * Upon the deletion of a GID entry, the HW vendor must free any 2304 * allocated memory. The caller will clear @context afterwards. 2305 * This function is only called when roce_gid_table is used. 2306 */ 2307 int (*del_gid)(const struct ib_gid_attr *attr, void **context); 2308 int (*query_pkey)(struct ib_device *device, u8 port_num, u16 index, 2309 u16 *pkey); 2310 int (*alloc_ucontext)(struct ib_ucontext *context, 2311 struct ib_udata *udata); 2312 void (*dealloc_ucontext)(struct ib_ucontext *context); 2313 int (*mmap)(struct ib_ucontext *context, struct vm_area_struct *vma); 2314 void (*disassociate_ucontext)(struct ib_ucontext *ibcontext); 2315 int (*alloc_pd)(struct ib_pd *pd, struct ib_udata *udata); 2316 void (*dealloc_pd)(struct ib_pd *pd, struct ib_udata *udata); 2317 int (*create_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr, 2318 u32 flags, struct ib_udata *udata); 2319 int (*modify_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 2320 int (*query_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 2321 void (*destroy_ah)(struct ib_ah *ah, u32 flags); 2322 int (*create_srq)(struct ib_srq *srq, 2323 struct ib_srq_init_attr *srq_init_attr, 2324 struct ib_udata *udata); 2325 int (*modify_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr, 2326 enum ib_srq_attr_mask srq_attr_mask, 2327 struct ib_udata *udata); 2328 int (*query_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr); 2329 void (*destroy_srq)(struct ib_srq *srq, struct ib_udata *udata); 2330 struct ib_qp *(*create_qp)(struct ib_pd *pd, 2331 struct ib_qp_init_attr *qp_init_attr, 2332 struct ib_udata *udata); 2333 int (*modify_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 2334 int qp_attr_mask, struct ib_udata *udata); 2335 int (*query_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 2336 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr); 2337 int (*destroy_qp)(struct ib_qp *qp, struct ib_udata *udata); 2338 int (*create_cq)(struct ib_cq *cq, const struct ib_cq_init_attr *attr, 2339 struct ib_udata *udata); 2340 int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period); 2341 void (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata); 2342 int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata); 2343 struct ib_mr *(*get_dma_mr)(struct ib_pd *pd, int mr_access_flags); 2344 struct ib_mr *(*reg_user_mr)(struct ib_pd *pd, u64 start, u64 length, 2345 u64 virt_addr, int mr_access_flags, 2346 struct ib_udata *udata); 2347 int (*rereg_user_mr)(struct ib_mr *mr, int flags, u64 start, u64 length, 2348 u64 virt_addr, int mr_access_flags, 2349 struct ib_pd *pd, struct ib_udata *udata); 2350 int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata); 2351 struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type, 2352 u32 max_num_sg, struct ib_udata *udata); 2353 struct ib_mr *(*alloc_mr_integrity)(struct ib_pd *pd, 2354 u32 max_num_data_sg, 2355 u32 max_num_meta_sg); 2356 int (*advise_mr)(struct ib_pd *pd, 2357 enum ib_uverbs_advise_mr_advice advice, u32 flags, 2358 struct ib_sge *sg_list, u32 num_sge, 2359 struct uverbs_attr_bundle *attrs); 2360 int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2361 unsigned int *sg_offset); 2362 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask, 2363 struct ib_mr_status *mr_status); 2364 struct ib_mw *(*alloc_mw)(struct ib_pd *pd, enum ib_mw_type type, 2365 struct ib_udata *udata); 2366 int (*dealloc_mw)(struct ib_mw *mw); 2367 struct ib_fmr *(*alloc_fmr)(struct ib_pd *pd, int mr_access_flags, 2368 struct ib_fmr_attr *fmr_attr); 2369 int (*map_phys_fmr)(struct ib_fmr *fmr, u64 *page_list, int list_len, 2370 u64 iova); 2371 int (*unmap_fmr)(struct list_head *fmr_list); 2372 int (*dealloc_fmr)(struct ib_fmr *fmr); 2373 int (*attach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid); 2374 int (*detach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid); 2375 struct ib_xrcd *(*alloc_xrcd)(struct ib_device *device, 2376 struct ib_udata *udata); 2377 int (*dealloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata); 2378 struct ib_flow *(*create_flow)(struct ib_qp *qp, 2379 struct ib_flow_attr *flow_attr, 2380 int domain, struct ib_udata *udata); 2381 int (*destroy_flow)(struct ib_flow *flow_id); 2382 struct ib_flow_action *(*create_flow_action_esp)( 2383 struct ib_device *device, 2384 const struct ib_flow_action_attrs_esp *attr, 2385 struct uverbs_attr_bundle *attrs); 2386 int (*destroy_flow_action)(struct ib_flow_action *action); 2387 int (*modify_flow_action_esp)( 2388 struct ib_flow_action *action, 2389 const struct ib_flow_action_attrs_esp *attr, 2390 struct uverbs_attr_bundle *attrs); 2391 int (*set_vf_link_state)(struct ib_device *device, int vf, u8 port, 2392 int state); 2393 int (*get_vf_config)(struct ib_device *device, int vf, u8 port, 2394 struct ifla_vf_info *ivf); 2395 int (*get_vf_stats)(struct ib_device *device, int vf, u8 port, 2396 struct ifla_vf_stats *stats); 2397 int (*set_vf_guid)(struct ib_device *device, int vf, u8 port, u64 guid, 2398 int type); 2399 struct ib_wq *(*create_wq)(struct ib_pd *pd, 2400 struct ib_wq_init_attr *init_attr, 2401 struct ib_udata *udata); 2402 void (*destroy_wq)(struct ib_wq *wq, struct ib_udata *udata); 2403 int (*modify_wq)(struct ib_wq *wq, struct ib_wq_attr *attr, 2404 u32 wq_attr_mask, struct ib_udata *udata); 2405 struct ib_rwq_ind_table *(*create_rwq_ind_table)( 2406 struct ib_device *device, 2407 struct ib_rwq_ind_table_init_attr *init_attr, 2408 struct ib_udata *udata); 2409 int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table); 2410 struct ib_dm *(*alloc_dm)(struct ib_device *device, 2411 struct ib_ucontext *context, 2412 struct ib_dm_alloc_attr *attr, 2413 struct uverbs_attr_bundle *attrs); 2414 int (*dealloc_dm)(struct ib_dm *dm, struct uverbs_attr_bundle *attrs); 2415 struct ib_mr *(*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm, 2416 struct ib_dm_mr_attr *attr, 2417 struct uverbs_attr_bundle *attrs); 2418 struct ib_counters *(*create_counters)( 2419 struct ib_device *device, struct uverbs_attr_bundle *attrs); 2420 int (*destroy_counters)(struct ib_counters *counters); 2421 int (*read_counters)(struct ib_counters *counters, 2422 struct ib_counters_read_attr *counters_read_attr, 2423 struct uverbs_attr_bundle *attrs); 2424 int (*map_mr_sg_pi)(struct ib_mr *mr, struct scatterlist *data_sg, 2425 int data_sg_nents, unsigned int *data_sg_offset, 2426 struct scatterlist *meta_sg, int meta_sg_nents, 2427 unsigned int *meta_sg_offset); 2428 2429 /** 2430 * alloc_hw_stats - Allocate a struct rdma_hw_stats and fill in the 2431 * driver initialized data. The struct is kfree()'ed by the sysfs 2432 * core when the device is removed. A lifespan of -1 in the return 2433 * struct tells the core to set a default lifespan. 2434 */ 2435 struct rdma_hw_stats *(*alloc_hw_stats)(struct ib_device *device, 2436 u8 port_num); 2437 /** 2438 * get_hw_stats - Fill in the counter value(s) in the stats struct. 2439 * @index - The index in the value array we wish to have updated, or 2440 * num_counters if we want all stats updated 2441 * Return codes - 2442 * < 0 - Error, no counters updated 2443 * index - Updated the single counter pointed to by index 2444 * num_counters - Updated all counters (will reset the timestamp 2445 * and prevent further calls for lifespan milliseconds) 2446 * Drivers are allowed to update all counters in leiu of just the 2447 * one given in index at their option 2448 */ 2449 int (*get_hw_stats)(struct ib_device *device, 2450 struct rdma_hw_stats *stats, u8 port, int index); 2451 /* 2452 * This function is called once for each port when a ib device is 2453 * registered. 2454 */ 2455 int (*init_port)(struct ib_device *device, u8 port_num, 2456 struct kobject *port_sysfs); 2457 /** 2458 * Allows rdma drivers to add their own restrack attributes. 2459 */ 2460 int (*fill_res_entry)(struct sk_buff *msg, 2461 struct rdma_restrack_entry *entry); 2462 2463 /* Device lifecycle callbacks */ 2464 /* 2465 * Called after the device becomes registered, before clients are 2466 * attached 2467 */ 2468 int (*enable_driver)(struct ib_device *dev); 2469 /* 2470 * This is called as part of ib_dealloc_device(). 2471 */ 2472 void (*dealloc_driver)(struct ib_device *dev); 2473 2474 /* iWarp CM callbacks */ 2475 void (*iw_add_ref)(struct ib_qp *qp); 2476 void (*iw_rem_ref)(struct ib_qp *qp); 2477 struct ib_qp *(*iw_get_qp)(struct ib_device *device, int qpn); 2478 int (*iw_connect)(struct iw_cm_id *cm_id, 2479 struct iw_cm_conn_param *conn_param); 2480 int (*iw_accept)(struct iw_cm_id *cm_id, 2481 struct iw_cm_conn_param *conn_param); 2482 int (*iw_reject)(struct iw_cm_id *cm_id, const void *pdata, 2483 u8 pdata_len); 2484 int (*iw_create_listen)(struct iw_cm_id *cm_id, int backlog); 2485 int (*iw_destroy_listen)(struct iw_cm_id *cm_id); 2486 2487 DECLARE_RDMA_OBJ_SIZE(ib_ah); 2488 DECLARE_RDMA_OBJ_SIZE(ib_cq); 2489 DECLARE_RDMA_OBJ_SIZE(ib_pd); 2490 DECLARE_RDMA_OBJ_SIZE(ib_srq); 2491 DECLARE_RDMA_OBJ_SIZE(ib_ucontext); 2492 }; 2493 2494 struct ib_core_device { 2495 /* device must be the first element in structure until, 2496 * union of ib_core_device and device exists in ib_device. 2497 */ 2498 struct device dev; 2499 possible_net_t rdma_net; 2500 struct kobject *ports_kobj; 2501 struct list_head port_list; 2502 struct ib_device *owner; /* reach back to owner ib_device */ 2503 }; 2504 2505 struct rdma_restrack_root; 2506 struct ib_device { 2507 /* Do not access @dma_device directly from ULP nor from HW drivers. */ 2508 struct device *dma_device; 2509 struct ib_device_ops ops; 2510 char name[IB_DEVICE_NAME_MAX]; 2511 struct rcu_head rcu_head; 2512 2513 struct list_head event_handler_list; 2514 spinlock_t event_handler_lock; 2515 2516 struct rw_semaphore client_data_rwsem; 2517 struct xarray client_data; 2518 struct mutex unregistration_lock; 2519 2520 struct ib_cache cache; 2521 /** 2522 * port_data is indexed by port number 2523 */ 2524 struct ib_port_data *port_data; 2525 2526 int num_comp_vectors; 2527 2528 union { 2529 struct device dev; 2530 struct ib_core_device coredev; 2531 }; 2532 2533 /* First group for device attributes, 2534 * Second group for driver provided attributes (optional). 2535 * It is NULL terminated array. 2536 */ 2537 const struct attribute_group *groups[3]; 2538 2539 u64 uverbs_cmd_mask; 2540 u64 uverbs_ex_cmd_mask; 2541 2542 char node_desc[IB_DEVICE_NODE_DESC_MAX]; 2543 __be64 node_guid; 2544 u32 local_dma_lkey; 2545 u16 is_switch:1; 2546 /* Indicates kernel verbs support, should not be used in drivers */ 2547 u16 kverbs_provider:1; 2548 u8 node_type; 2549 u8 phys_port_cnt; 2550 struct ib_device_attr attrs; 2551 struct attribute_group *hw_stats_ag; 2552 struct rdma_hw_stats *hw_stats; 2553 2554 #ifdef CONFIG_CGROUP_RDMA 2555 struct rdmacg_device cg_device; 2556 #endif 2557 2558 u32 index; 2559 struct rdma_restrack_root *res; 2560 2561 const struct uapi_definition *driver_def; 2562 2563 /* 2564 * Positive refcount indicates that the device is currently 2565 * registered and cannot be unregistered. 2566 */ 2567 refcount_t refcount; 2568 struct completion unreg_completion; 2569 struct work_struct unregistration_work; 2570 2571 const struct rdma_link_ops *link_ops; 2572 2573 /* Protects compat_devs xarray modifications */ 2574 struct mutex compat_devs_mutex; 2575 /* Maintains compat devices for each net namespace */ 2576 struct xarray compat_devs; 2577 2578 /* Used by iWarp CM */ 2579 char iw_ifname[IFNAMSIZ]; 2580 u32 iw_driver_flags; 2581 }; 2582 2583 struct ib_client_nl_info; 2584 struct ib_client { 2585 const char *name; 2586 void (*add) (struct ib_device *); 2587 void (*remove)(struct ib_device *, void *client_data); 2588 int (*get_nl_info)(struct ib_device *ibdev, void *client_data, 2589 struct ib_client_nl_info *res); 2590 int (*get_global_nl_info)(struct ib_client_nl_info *res); 2591 2592 /* Returns the net_dev belonging to this ib_client and matching the 2593 * given parameters. 2594 * @dev: An RDMA device that the net_dev use for communication. 2595 * @port: A physical port number on the RDMA device. 2596 * @pkey: P_Key that the net_dev uses if applicable. 2597 * @gid: A GID that the net_dev uses to communicate. 2598 * @addr: An IP address the net_dev is configured with. 2599 * @client_data: The device's client data set by ib_set_client_data(). 2600 * 2601 * An ib_client that implements a net_dev on top of RDMA devices 2602 * (such as IP over IB) should implement this callback, allowing the 2603 * rdma_cm module to find the right net_dev for a given request. 2604 * 2605 * The caller is responsible for calling dev_put on the returned 2606 * netdev. */ 2607 struct net_device *(*get_net_dev_by_params)( 2608 struct ib_device *dev, 2609 u8 port, 2610 u16 pkey, 2611 const union ib_gid *gid, 2612 const struct sockaddr *addr, 2613 void *client_data); 2614 struct list_head list; 2615 u32 client_id; 2616 2617 /* kverbs are not required by the client */ 2618 u8 no_kverbs_req:1; 2619 }; 2620 2621 /* 2622 * IB block DMA iterator 2623 * 2624 * Iterates the DMA-mapped SGL in contiguous memory blocks aligned 2625 * to a HW supported page size. 2626 */ 2627 struct ib_block_iter { 2628 /* internal states */ 2629 struct scatterlist *__sg; /* sg holding the current aligned block */ 2630 dma_addr_t __dma_addr; /* unaligned DMA address of this block */ 2631 unsigned int __sg_nents; /* number of SG entries */ 2632 unsigned int __sg_advance; /* number of bytes to advance in sg in next step */ 2633 unsigned int __pg_bit; /* alignment of current block */ 2634 }; 2635 2636 struct ib_device *_ib_alloc_device(size_t size); 2637 #define ib_alloc_device(drv_struct, member) \ 2638 container_of(_ib_alloc_device(sizeof(struct drv_struct) + \ 2639 BUILD_BUG_ON_ZERO(offsetof( \ 2640 struct drv_struct, member))), \ 2641 struct drv_struct, member) 2642 2643 void ib_dealloc_device(struct ib_device *device); 2644 2645 void ib_get_device_fw_str(struct ib_device *device, char *str); 2646 2647 int ib_register_device(struct ib_device *device, const char *name); 2648 void ib_unregister_device(struct ib_device *device); 2649 void ib_unregister_driver(enum rdma_driver_id driver_id); 2650 void ib_unregister_device_and_put(struct ib_device *device); 2651 void ib_unregister_device_queued(struct ib_device *ib_dev); 2652 2653 int ib_register_client (struct ib_client *client); 2654 void ib_unregister_client(struct ib_client *client); 2655 2656 void __rdma_block_iter_start(struct ib_block_iter *biter, 2657 struct scatterlist *sglist, 2658 unsigned int nents, 2659 unsigned long pgsz); 2660 bool __rdma_block_iter_next(struct ib_block_iter *biter); 2661 2662 /** 2663 * rdma_block_iter_dma_address - get the aligned dma address of the current 2664 * block held by the block iterator. 2665 * @biter: block iterator holding the memory block 2666 */ 2667 static inline dma_addr_t 2668 rdma_block_iter_dma_address(struct ib_block_iter *biter) 2669 { 2670 return biter->__dma_addr & ~(BIT_ULL(biter->__pg_bit) - 1); 2671 } 2672 2673 /** 2674 * rdma_for_each_block - iterate over contiguous memory blocks of the sg list 2675 * @sglist: sglist to iterate over 2676 * @biter: block iterator holding the memory block 2677 * @nents: maximum number of sg entries to iterate over 2678 * @pgsz: best HW supported page size to use 2679 * 2680 * Callers may use rdma_block_iter_dma_address() to get each 2681 * blocks aligned DMA address. 2682 */ 2683 #define rdma_for_each_block(sglist, biter, nents, pgsz) \ 2684 for (__rdma_block_iter_start(biter, sglist, nents, \ 2685 pgsz); \ 2686 __rdma_block_iter_next(biter);) 2687 2688 /** 2689 * ib_get_client_data - Get IB client context 2690 * @device:Device to get context for 2691 * @client:Client to get context for 2692 * 2693 * ib_get_client_data() returns the client context data set with 2694 * ib_set_client_data(). This can only be called while the client is 2695 * registered to the device, once the ib_client remove() callback returns this 2696 * cannot be called. 2697 */ 2698 static inline void *ib_get_client_data(struct ib_device *device, 2699 struct ib_client *client) 2700 { 2701 return xa_load(&device->client_data, client->client_id); 2702 } 2703 void ib_set_client_data(struct ib_device *device, struct ib_client *client, 2704 void *data); 2705 void ib_set_device_ops(struct ib_device *device, 2706 const struct ib_device_ops *ops); 2707 2708 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) 2709 int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma, 2710 unsigned long pfn, unsigned long size, pgprot_t prot); 2711 #else 2712 static inline int rdma_user_mmap_io(struct ib_ucontext *ucontext, 2713 struct vm_area_struct *vma, 2714 unsigned long pfn, unsigned long size, 2715 pgprot_t prot) 2716 { 2717 return -EINVAL; 2718 } 2719 #endif 2720 2721 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len) 2722 { 2723 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0; 2724 } 2725 2726 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len) 2727 { 2728 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0; 2729 } 2730 2731 static inline bool ib_is_buffer_cleared(const void __user *p, 2732 size_t len) 2733 { 2734 bool ret; 2735 u8 *buf; 2736 2737 if (len > USHRT_MAX) 2738 return false; 2739 2740 buf = memdup_user(p, len); 2741 if (IS_ERR(buf)) 2742 return false; 2743 2744 ret = !memchr_inv(buf, 0, len); 2745 kfree(buf); 2746 return ret; 2747 } 2748 2749 static inline bool ib_is_udata_cleared(struct ib_udata *udata, 2750 size_t offset, 2751 size_t len) 2752 { 2753 return ib_is_buffer_cleared(udata->inbuf + offset, len); 2754 } 2755 2756 /** 2757 * ib_is_destroy_retryable - Check whether the uobject destruction 2758 * is retryable. 2759 * @ret: The initial destruction return code 2760 * @why: remove reason 2761 * @uobj: The uobject that is destroyed 2762 * 2763 * This function is a helper function that IB layer and low-level drivers 2764 * can use to consider whether the destruction of the given uobject is 2765 * retry-able. 2766 * It checks the original return code, if it wasn't success the destruction 2767 * is retryable according to the ucontext state (i.e. cleanup_retryable) and 2768 * the remove reason. (i.e. why). 2769 * Must be called with the object locked for destroy. 2770 */ 2771 static inline bool ib_is_destroy_retryable(int ret, enum rdma_remove_reason why, 2772 struct ib_uobject *uobj) 2773 { 2774 return ret && (why == RDMA_REMOVE_DESTROY || 2775 uobj->context->cleanup_retryable); 2776 } 2777 2778 /** 2779 * ib_destroy_usecnt - Called during destruction to check the usecnt 2780 * @usecnt: The usecnt atomic 2781 * @why: remove reason 2782 * @uobj: The uobject that is destroyed 2783 * 2784 * Non-zero usecnts will block destruction unless destruction was triggered by 2785 * a ucontext cleanup. 2786 */ 2787 static inline int ib_destroy_usecnt(atomic_t *usecnt, 2788 enum rdma_remove_reason why, 2789 struct ib_uobject *uobj) 2790 { 2791 if (atomic_read(usecnt) && ib_is_destroy_retryable(-EBUSY, why, uobj)) 2792 return -EBUSY; 2793 return 0; 2794 } 2795 2796 /** 2797 * ib_modify_qp_is_ok - Check that the supplied attribute mask 2798 * contains all required attributes and no attributes not allowed for 2799 * the given QP state transition. 2800 * @cur_state: Current QP state 2801 * @next_state: Next QP state 2802 * @type: QP type 2803 * @mask: Mask of supplied QP attributes 2804 * 2805 * This function is a helper function that a low-level driver's 2806 * modify_qp method can use to validate the consumer's input. It 2807 * checks that cur_state and next_state are valid QP states, that a 2808 * transition from cur_state to next_state is allowed by the IB spec, 2809 * and that the attribute mask supplied is allowed for the transition. 2810 */ 2811 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 2812 enum ib_qp_type type, enum ib_qp_attr_mask mask); 2813 2814 void ib_register_event_handler(struct ib_event_handler *event_handler); 2815 void ib_unregister_event_handler(struct ib_event_handler *event_handler); 2816 void ib_dispatch_event(struct ib_event *event); 2817 2818 int ib_query_port(struct ib_device *device, 2819 u8 port_num, struct ib_port_attr *port_attr); 2820 2821 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, 2822 u8 port_num); 2823 2824 /** 2825 * rdma_cap_ib_switch - Check if the device is IB switch 2826 * @device: Device to check 2827 * 2828 * Device driver is responsible for setting is_switch bit on 2829 * in ib_device structure at init time. 2830 * 2831 * Return: true if the device is IB switch. 2832 */ 2833 static inline bool rdma_cap_ib_switch(const struct ib_device *device) 2834 { 2835 return device->is_switch; 2836 } 2837 2838 /** 2839 * rdma_start_port - Return the first valid port number for the device 2840 * specified 2841 * 2842 * @device: Device to be checked 2843 * 2844 * Return start port number 2845 */ 2846 static inline u8 rdma_start_port(const struct ib_device *device) 2847 { 2848 return rdma_cap_ib_switch(device) ? 0 : 1; 2849 } 2850 2851 /** 2852 * rdma_for_each_port - Iterate over all valid port numbers of the IB device 2853 * @device - The struct ib_device * to iterate over 2854 * @iter - The unsigned int to store the port number 2855 */ 2856 #define rdma_for_each_port(device, iter) \ 2857 for (iter = rdma_start_port(device + BUILD_BUG_ON_ZERO(!__same_type( \ 2858 unsigned int, iter))); \ 2859 iter <= rdma_end_port(device); (iter)++) 2860 2861 /** 2862 * rdma_end_port - Return the last valid port number for the device 2863 * specified 2864 * 2865 * @device: Device to be checked 2866 * 2867 * Return last port number 2868 */ 2869 static inline u8 rdma_end_port(const struct ib_device *device) 2870 { 2871 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt; 2872 } 2873 2874 static inline int rdma_is_port_valid(const struct ib_device *device, 2875 unsigned int port) 2876 { 2877 return (port >= rdma_start_port(device) && 2878 port <= rdma_end_port(device)); 2879 } 2880 2881 static inline bool rdma_is_grh_required(const struct ib_device *device, 2882 u8 port_num) 2883 { 2884 return device->port_data[port_num].immutable.core_cap_flags & 2885 RDMA_CORE_PORT_IB_GRH_REQUIRED; 2886 } 2887 2888 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num) 2889 { 2890 return device->port_data[port_num].immutable.core_cap_flags & 2891 RDMA_CORE_CAP_PROT_IB; 2892 } 2893 2894 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num) 2895 { 2896 return device->port_data[port_num].immutable.core_cap_flags & 2897 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP); 2898 } 2899 2900 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device, u8 port_num) 2901 { 2902 return device->port_data[port_num].immutable.core_cap_flags & 2903 RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 2904 } 2905 2906 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device, u8 port_num) 2907 { 2908 return device->port_data[port_num].immutable.core_cap_flags & 2909 RDMA_CORE_CAP_PROT_ROCE; 2910 } 2911 2912 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num) 2913 { 2914 return device->port_data[port_num].immutable.core_cap_flags & 2915 RDMA_CORE_CAP_PROT_IWARP; 2916 } 2917 2918 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num) 2919 { 2920 return rdma_protocol_ib(device, port_num) || 2921 rdma_protocol_roce(device, port_num); 2922 } 2923 2924 static inline bool rdma_protocol_raw_packet(const struct ib_device *device, u8 port_num) 2925 { 2926 return device->port_data[port_num].immutable.core_cap_flags & 2927 RDMA_CORE_CAP_PROT_RAW_PACKET; 2928 } 2929 2930 static inline bool rdma_protocol_usnic(const struct ib_device *device, u8 port_num) 2931 { 2932 return device->port_data[port_num].immutable.core_cap_flags & 2933 RDMA_CORE_CAP_PROT_USNIC; 2934 } 2935 2936 /** 2937 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband 2938 * Management Datagrams. 2939 * @device: Device to check 2940 * @port_num: Port number to check 2941 * 2942 * Management Datagrams (MAD) are a required part of the InfiniBand 2943 * specification and are supported on all InfiniBand devices. A slightly 2944 * extended version are also supported on OPA interfaces. 2945 * 2946 * Return: true if the port supports sending/receiving of MAD packets. 2947 */ 2948 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num) 2949 { 2950 return device->port_data[port_num].immutable.core_cap_flags & 2951 RDMA_CORE_CAP_IB_MAD; 2952 } 2953 2954 /** 2955 * rdma_cap_opa_mad - Check if the port of device provides support for OPA 2956 * Management Datagrams. 2957 * @device: Device to check 2958 * @port_num: Port number to check 2959 * 2960 * Intel OmniPath devices extend and/or replace the InfiniBand Management 2961 * datagrams with their own versions. These OPA MADs share many but not all of 2962 * the characteristics of InfiniBand MADs. 2963 * 2964 * OPA MADs differ in the following ways: 2965 * 2966 * 1) MADs are variable size up to 2K 2967 * IBTA defined MADs remain fixed at 256 bytes 2968 * 2) OPA SMPs must carry valid PKeys 2969 * 3) OPA SMP packets are a different format 2970 * 2971 * Return: true if the port supports OPA MAD packet formats. 2972 */ 2973 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num) 2974 { 2975 return device->port_data[port_num].immutable.core_cap_flags & 2976 RDMA_CORE_CAP_OPA_MAD; 2977 } 2978 2979 /** 2980 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband 2981 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI). 2982 * @device: Device to check 2983 * @port_num: Port number to check 2984 * 2985 * Each InfiniBand node is required to provide a Subnet Management Agent 2986 * that the subnet manager can access. Prior to the fabric being fully 2987 * configured by the subnet manager, the SMA is accessed via a well known 2988 * interface called the Subnet Management Interface (SMI). This interface 2989 * uses directed route packets to communicate with the SM to get around the 2990 * chicken and egg problem of the SM needing to know what's on the fabric 2991 * in order to configure the fabric, and needing to configure the fabric in 2992 * order to send packets to the devices on the fabric. These directed 2993 * route packets do not need the fabric fully configured in order to reach 2994 * their destination. The SMI is the only method allowed to send 2995 * directed route packets on an InfiniBand fabric. 2996 * 2997 * Return: true if the port provides an SMI. 2998 */ 2999 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num) 3000 { 3001 return device->port_data[port_num].immutable.core_cap_flags & 3002 RDMA_CORE_CAP_IB_SMI; 3003 } 3004 3005 /** 3006 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband 3007 * Communication Manager. 3008 * @device: Device to check 3009 * @port_num: Port number to check 3010 * 3011 * The InfiniBand Communication Manager is one of many pre-defined General 3012 * Service Agents (GSA) that are accessed via the General Service 3013 * Interface (GSI). It's role is to facilitate establishment of connections 3014 * between nodes as well as other management related tasks for established 3015 * connections. 3016 * 3017 * Return: true if the port supports an IB CM (this does not guarantee that 3018 * a CM is actually running however). 3019 */ 3020 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num) 3021 { 3022 return device->port_data[port_num].immutable.core_cap_flags & 3023 RDMA_CORE_CAP_IB_CM; 3024 } 3025 3026 /** 3027 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP 3028 * Communication Manager. 3029 * @device: Device to check 3030 * @port_num: Port number to check 3031 * 3032 * Similar to above, but specific to iWARP connections which have a different 3033 * managment protocol than InfiniBand. 3034 * 3035 * Return: true if the port supports an iWARP CM (this does not guarantee that 3036 * a CM is actually running however). 3037 */ 3038 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num) 3039 { 3040 return device->port_data[port_num].immutable.core_cap_flags & 3041 RDMA_CORE_CAP_IW_CM; 3042 } 3043 3044 /** 3045 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband 3046 * Subnet Administration. 3047 * @device: Device to check 3048 * @port_num: Port number to check 3049 * 3050 * An InfiniBand Subnet Administration (SA) service is a pre-defined General 3051 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand 3052 * fabrics, devices should resolve routes to other hosts by contacting the 3053 * SA to query the proper route. 3054 * 3055 * Return: true if the port should act as a client to the fabric Subnet 3056 * Administration interface. This does not imply that the SA service is 3057 * running locally. 3058 */ 3059 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num) 3060 { 3061 return device->port_data[port_num].immutable.core_cap_flags & 3062 RDMA_CORE_CAP_IB_SA; 3063 } 3064 3065 /** 3066 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband 3067 * Multicast. 3068 * @device: Device to check 3069 * @port_num: Port number to check 3070 * 3071 * InfiniBand multicast registration is more complex than normal IPv4 or 3072 * IPv6 multicast registration. Each Host Channel Adapter must register 3073 * with the Subnet Manager when it wishes to join a multicast group. It 3074 * should do so only once regardless of how many queue pairs it subscribes 3075 * to this group. And it should leave the group only after all queue pairs 3076 * attached to the group have been detached. 3077 * 3078 * Return: true if the port must undertake the additional adminstrative 3079 * overhead of registering/unregistering with the SM and tracking of the 3080 * total number of queue pairs attached to the multicast group. 3081 */ 3082 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num) 3083 { 3084 return rdma_cap_ib_sa(device, port_num); 3085 } 3086 3087 /** 3088 * rdma_cap_af_ib - Check if the port of device has the capability 3089 * Native Infiniband Address. 3090 * @device: Device to check 3091 * @port_num: Port number to check 3092 * 3093 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default 3094 * GID. RoCE uses a different mechanism, but still generates a GID via 3095 * a prescribed mechanism and port specific data. 3096 * 3097 * Return: true if the port uses a GID address to identify devices on the 3098 * network. 3099 */ 3100 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num) 3101 { 3102 return device->port_data[port_num].immutable.core_cap_flags & 3103 RDMA_CORE_CAP_AF_IB; 3104 } 3105 3106 /** 3107 * rdma_cap_eth_ah - Check if the port of device has the capability 3108 * Ethernet Address Handle. 3109 * @device: Device to check 3110 * @port_num: Port number to check 3111 * 3112 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique 3113 * to fabricate GIDs over Ethernet/IP specific addresses native to the 3114 * port. Normally, packet headers are generated by the sending host 3115 * adapter, but when sending connectionless datagrams, we must manually 3116 * inject the proper headers for the fabric we are communicating over. 3117 * 3118 * Return: true if we are running as a RoCE port and must force the 3119 * addition of a Global Route Header built from our Ethernet Address 3120 * Handle into our header list for connectionless packets. 3121 */ 3122 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num) 3123 { 3124 return device->port_data[port_num].immutable.core_cap_flags & 3125 RDMA_CORE_CAP_ETH_AH; 3126 } 3127 3128 /** 3129 * rdma_cap_opa_ah - Check if the port of device supports 3130 * OPA Address handles 3131 * @device: Device to check 3132 * @port_num: Port number to check 3133 * 3134 * Return: true if we are running on an OPA device which supports 3135 * the extended OPA addressing. 3136 */ 3137 static inline bool rdma_cap_opa_ah(struct ib_device *device, u8 port_num) 3138 { 3139 return (device->port_data[port_num].immutable.core_cap_flags & 3140 RDMA_CORE_CAP_OPA_AH) == RDMA_CORE_CAP_OPA_AH; 3141 } 3142 3143 /** 3144 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port. 3145 * 3146 * @device: Device 3147 * @port_num: Port number 3148 * 3149 * This MAD size includes the MAD headers and MAD payload. No other headers 3150 * are included. 3151 * 3152 * Return the max MAD size required by the Port. Will return 0 if the port 3153 * does not support MADs 3154 */ 3155 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num) 3156 { 3157 return device->port_data[port_num].immutable.max_mad_size; 3158 } 3159 3160 /** 3161 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table 3162 * @device: Device to check 3163 * @port_num: Port number to check 3164 * 3165 * RoCE GID table mechanism manages the various GIDs for a device. 3166 * 3167 * NOTE: if allocating the port's GID table has failed, this call will still 3168 * return true, but any RoCE GID table API will fail. 3169 * 3170 * Return: true if the port uses RoCE GID table mechanism in order to manage 3171 * its GIDs. 3172 */ 3173 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device, 3174 u8 port_num) 3175 { 3176 return rdma_protocol_roce(device, port_num) && 3177 device->ops.add_gid && device->ops.del_gid; 3178 } 3179 3180 /* 3181 * Check if the device supports READ W/ INVALIDATE. 3182 */ 3183 static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num) 3184 { 3185 /* 3186 * iWarp drivers must support READ W/ INVALIDATE. No other protocol 3187 * has support for it yet. 3188 */ 3189 return rdma_protocol_iwarp(dev, port_num); 3190 } 3191 3192 /** 3193 * rdma_find_pg_bit - Find page bit given address and HW supported page sizes 3194 * 3195 * @addr: address 3196 * @pgsz_bitmap: bitmap of HW supported page sizes 3197 */ 3198 static inline unsigned int rdma_find_pg_bit(unsigned long addr, 3199 unsigned long pgsz_bitmap) 3200 { 3201 unsigned long align; 3202 unsigned long pgsz; 3203 3204 align = addr & -addr; 3205 3206 /* Find page bit such that addr is aligned to the highest supported 3207 * HW page size 3208 */ 3209 pgsz = pgsz_bitmap & ~(-align << 1); 3210 if (!pgsz) 3211 return __ffs(pgsz_bitmap); 3212 3213 return __fls(pgsz); 3214 } 3215 3216 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 3217 int state); 3218 int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 3219 struct ifla_vf_info *info); 3220 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 3221 struct ifla_vf_stats *stats); 3222 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 3223 int type); 3224 3225 int ib_query_pkey(struct ib_device *device, 3226 u8 port_num, u16 index, u16 *pkey); 3227 3228 int ib_modify_device(struct ib_device *device, 3229 int device_modify_mask, 3230 struct ib_device_modify *device_modify); 3231 3232 int ib_modify_port(struct ib_device *device, 3233 u8 port_num, int port_modify_mask, 3234 struct ib_port_modify *port_modify); 3235 3236 int ib_find_gid(struct ib_device *device, union ib_gid *gid, 3237 u8 *port_num, u16 *index); 3238 3239 int ib_find_pkey(struct ib_device *device, 3240 u8 port_num, u16 pkey, u16 *index); 3241 3242 enum ib_pd_flags { 3243 /* 3244 * Create a memory registration for all memory in the system and place 3245 * the rkey for it into pd->unsafe_global_rkey. This can be used by 3246 * ULPs to avoid the overhead of dynamic MRs. 3247 * 3248 * This flag is generally considered unsafe and must only be used in 3249 * extremly trusted environments. Every use of it will log a warning 3250 * in the kernel log. 3251 */ 3252 IB_PD_UNSAFE_GLOBAL_RKEY = 0x01, 3253 }; 3254 3255 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 3256 const char *caller); 3257 3258 #define ib_alloc_pd(device, flags) \ 3259 __ib_alloc_pd((device), (flags), KBUILD_MODNAME) 3260 3261 /** 3262 * ib_dealloc_pd_user - Deallocate kernel/user PD 3263 * @pd: The protection domain 3264 * @udata: Valid user data or NULL for kernel objects 3265 */ 3266 void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata); 3267 3268 /** 3269 * ib_dealloc_pd - Deallocate kernel PD 3270 * @pd: The protection domain 3271 * 3272 * NOTE: for user PD use ib_dealloc_pd_user with valid udata! 3273 */ 3274 static inline void ib_dealloc_pd(struct ib_pd *pd) 3275 { 3276 ib_dealloc_pd_user(pd, NULL); 3277 } 3278 3279 enum rdma_create_ah_flags { 3280 /* In a sleepable context */ 3281 RDMA_CREATE_AH_SLEEPABLE = BIT(0), 3282 }; 3283 3284 /** 3285 * rdma_create_ah - Creates an address handle for the given address vector. 3286 * @pd: The protection domain associated with the address handle. 3287 * @ah_attr: The attributes of the address vector. 3288 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 3289 * 3290 * The address handle is used to reference a local or global destination 3291 * in all UD QP post sends. 3292 */ 3293 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, 3294 u32 flags); 3295 3296 /** 3297 * rdma_create_user_ah - Creates an address handle for the given address vector. 3298 * It resolves destination mac address for ah attribute of RoCE type. 3299 * @pd: The protection domain associated with the address handle. 3300 * @ah_attr: The attributes of the address vector. 3301 * @udata: pointer to user's input output buffer information need by 3302 * provider driver. 3303 * 3304 * It returns 0 on success and returns appropriate error code on error. 3305 * The address handle is used to reference a local or global destination 3306 * in all UD QP post sends. 3307 */ 3308 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 3309 struct rdma_ah_attr *ah_attr, 3310 struct ib_udata *udata); 3311 /** 3312 * ib_get_gids_from_rdma_hdr - Get sgid and dgid from GRH or IPv4 header 3313 * work completion. 3314 * @hdr: the L3 header to parse 3315 * @net_type: type of header to parse 3316 * @sgid: place to store source gid 3317 * @dgid: place to store destination gid 3318 */ 3319 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 3320 enum rdma_network_type net_type, 3321 union ib_gid *sgid, union ib_gid *dgid); 3322 3323 /** 3324 * ib_get_rdma_header_version - Get the header version 3325 * @hdr: the L3 header to parse 3326 */ 3327 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr); 3328 3329 /** 3330 * ib_init_ah_attr_from_wc - Initializes address handle attributes from a 3331 * work completion. 3332 * @device: Device on which the received message arrived. 3333 * @port_num: Port on which the received message arrived. 3334 * @wc: Work completion associated with the received message. 3335 * @grh: References the received global route header. This parameter is 3336 * ignored unless the work completion indicates that the GRH is valid. 3337 * @ah_attr: Returned attributes that can be used when creating an address 3338 * handle for replying to the message. 3339 * When ib_init_ah_attr_from_wc() returns success, 3340 * (a) for IB link layer it optionally contains a reference to SGID attribute 3341 * when GRH is present for IB link layer. 3342 * (b) for RoCE link layer it contains a reference to SGID attribute. 3343 * User must invoke rdma_cleanup_ah_attr_gid_attr() to release reference to SGID 3344 * attributes which are initialized using ib_init_ah_attr_from_wc(). 3345 * 3346 */ 3347 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num, 3348 const struct ib_wc *wc, const struct ib_grh *grh, 3349 struct rdma_ah_attr *ah_attr); 3350 3351 /** 3352 * ib_create_ah_from_wc - Creates an address handle associated with the 3353 * sender of the specified work completion. 3354 * @pd: The protection domain associated with the address handle. 3355 * @wc: Work completion information associated with a received message. 3356 * @grh: References the received global route header. This parameter is 3357 * ignored unless the work completion indicates that the GRH is valid. 3358 * @port_num: The outbound port number to associate with the address. 3359 * 3360 * The address handle is used to reference a local or global destination 3361 * in all UD QP post sends. 3362 */ 3363 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 3364 const struct ib_grh *grh, u8 port_num); 3365 3366 /** 3367 * rdma_modify_ah - Modifies the address vector associated with an address 3368 * handle. 3369 * @ah: The address handle to modify. 3370 * @ah_attr: The new address vector attributes to associate with the 3371 * address handle. 3372 */ 3373 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3374 3375 /** 3376 * rdma_query_ah - Queries the address vector associated with an address 3377 * handle. 3378 * @ah: The address handle to query. 3379 * @ah_attr: The address vector attributes associated with the address 3380 * handle. 3381 */ 3382 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr); 3383 3384 enum rdma_destroy_ah_flags { 3385 /* In a sleepable context */ 3386 RDMA_DESTROY_AH_SLEEPABLE = BIT(0), 3387 }; 3388 3389 /** 3390 * rdma_destroy_ah_user - Destroys an address handle. 3391 * @ah: The address handle to destroy. 3392 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags). 3393 * @udata: Valid user data or NULL for kernel objects 3394 */ 3395 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata); 3396 3397 /** 3398 * rdma_destroy_ah - Destroys an kernel address handle. 3399 * @ah: The address handle to destroy. 3400 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags). 3401 * 3402 * NOTE: for user ah use rdma_destroy_ah_user with valid udata! 3403 */ 3404 static inline int rdma_destroy_ah(struct ib_ah *ah, u32 flags) 3405 { 3406 return rdma_destroy_ah_user(ah, flags, NULL); 3407 } 3408 3409 /** 3410 * ib_create_srq - Creates a SRQ associated with the specified protection 3411 * domain. 3412 * @pd: The protection domain associated with the SRQ. 3413 * @srq_init_attr: A list of initial attributes required to create the 3414 * SRQ. If SRQ creation succeeds, then the attributes are updated to 3415 * the actual capabilities of the created SRQ. 3416 * 3417 * srq_attr->max_wr and srq_attr->max_sge are read the determine the 3418 * requested size of the SRQ, and set to the actual values allocated 3419 * on return. If ib_create_srq() succeeds, then max_wr and max_sge 3420 * will always be at least as large as the requested values. 3421 */ 3422 struct ib_srq *ib_create_srq(struct ib_pd *pd, 3423 struct ib_srq_init_attr *srq_init_attr); 3424 3425 /** 3426 * ib_modify_srq - Modifies the attributes for the specified SRQ. 3427 * @srq: The SRQ to modify. 3428 * @srq_attr: On input, specifies the SRQ attributes to modify. On output, 3429 * the current values of selected SRQ attributes are returned. 3430 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ 3431 * are being modified. 3432 * 3433 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or 3434 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when 3435 * the number of receives queued drops below the limit. 3436 */ 3437 int ib_modify_srq(struct ib_srq *srq, 3438 struct ib_srq_attr *srq_attr, 3439 enum ib_srq_attr_mask srq_attr_mask); 3440 3441 /** 3442 * ib_query_srq - Returns the attribute list and current values for the 3443 * specified SRQ. 3444 * @srq: The SRQ to query. 3445 * @srq_attr: The attributes of the specified SRQ. 3446 */ 3447 int ib_query_srq(struct ib_srq *srq, 3448 struct ib_srq_attr *srq_attr); 3449 3450 /** 3451 * ib_destroy_srq_user - Destroys the specified SRQ. 3452 * @srq: The SRQ to destroy. 3453 * @udata: Valid user data or NULL for kernel objects 3454 */ 3455 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata); 3456 3457 /** 3458 * ib_destroy_srq - Destroys the specified kernel SRQ. 3459 * @srq: The SRQ to destroy. 3460 * 3461 * NOTE: for user srq use ib_destroy_srq_user with valid udata! 3462 */ 3463 static inline int ib_destroy_srq(struct ib_srq *srq) 3464 { 3465 return ib_destroy_srq_user(srq, NULL); 3466 } 3467 3468 /** 3469 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ. 3470 * @srq: The SRQ to post the work request on. 3471 * @recv_wr: A list of work requests to post on the receive queue. 3472 * @bad_recv_wr: On an immediate failure, this parameter will reference 3473 * the work request that failed to be posted on the QP. 3474 */ 3475 static inline int ib_post_srq_recv(struct ib_srq *srq, 3476 const struct ib_recv_wr *recv_wr, 3477 const struct ib_recv_wr **bad_recv_wr) 3478 { 3479 const struct ib_recv_wr *dummy; 3480 3481 return srq->device->ops.post_srq_recv(srq, recv_wr, 3482 bad_recv_wr ? : &dummy); 3483 } 3484 3485 /** 3486 * ib_create_qp_user - Creates a QP associated with the specified protection 3487 * domain. 3488 * @pd: The protection domain associated with the QP. 3489 * @qp_init_attr: A list of initial attributes required to create the 3490 * QP. If QP creation succeeds, then the attributes are updated to 3491 * the actual capabilities of the created QP. 3492 * @udata: Valid user data or NULL for kernel objects 3493 */ 3494 struct ib_qp *ib_create_qp_user(struct ib_pd *pd, 3495 struct ib_qp_init_attr *qp_init_attr, 3496 struct ib_udata *udata); 3497 3498 /** 3499 * ib_create_qp - Creates a kernel QP associated with the specified protection 3500 * domain. 3501 * @pd: The protection domain associated with the QP. 3502 * @qp_init_attr: A list of initial attributes required to create the 3503 * QP. If QP creation succeeds, then the attributes are updated to 3504 * the actual capabilities of the created QP. 3505 * @udata: Valid user data or NULL for kernel objects 3506 * 3507 * NOTE: for user qp use ib_create_qp_user with valid udata! 3508 */ 3509 static inline struct ib_qp *ib_create_qp(struct ib_pd *pd, 3510 struct ib_qp_init_attr *qp_init_attr) 3511 { 3512 return ib_create_qp_user(pd, qp_init_attr, NULL); 3513 } 3514 3515 /** 3516 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 3517 * @qp: The QP to modify. 3518 * @attr: On input, specifies the QP attributes to modify. On output, 3519 * the current values of selected QP attributes are returned. 3520 * @attr_mask: A bit-mask used to specify which attributes of the QP 3521 * are being modified. 3522 * @udata: pointer to user's input output buffer information 3523 * are being modified. 3524 * It returns 0 on success and returns appropriate error code on error. 3525 */ 3526 int ib_modify_qp_with_udata(struct ib_qp *qp, 3527 struct ib_qp_attr *attr, 3528 int attr_mask, 3529 struct ib_udata *udata); 3530 3531 /** 3532 * ib_modify_qp - Modifies the attributes for the specified QP and then 3533 * transitions the QP to the given state. 3534 * @qp: The QP to modify. 3535 * @qp_attr: On input, specifies the QP attributes to modify. On output, 3536 * the current values of selected QP attributes are returned. 3537 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP 3538 * are being modified. 3539 */ 3540 int ib_modify_qp(struct ib_qp *qp, 3541 struct ib_qp_attr *qp_attr, 3542 int qp_attr_mask); 3543 3544 /** 3545 * ib_query_qp - Returns the attribute list and current values for the 3546 * specified QP. 3547 * @qp: The QP to query. 3548 * @qp_attr: The attributes of the specified QP. 3549 * @qp_attr_mask: A bit-mask used to select specific attributes to query. 3550 * @qp_init_attr: Additional attributes of the selected QP. 3551 * 3552 * The qp_attr_mask may be used to limit the query to gathering only the 3553 * selected attributes. 3554 */ 3555 int ib_query_qp(struct ib_qp *qp, 3556 struct ib_qp_attr *qp_attr, 3557 int qp_attr_mask, 3558 struct ib_qp_init_attr *qp_init_attr); 3559 3560 /** 3561 * ib_destroy_qp - Destroys the specified QP. 3562 * @qp: The QP to destroy. 3563 * @udata: Valid udata or NULL for kernel objects 3564 */ 3565 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata); 3566 3567 /** 3568 * ib_destroy_qp - Destroys the specified kernel QP. 3569 * @qp: The QP to destroy. 3570 * 3571 * NOTE: for user qp use ib_destroy_qp_user with valid udata! 3572 */ 3573 static inline int ib_destroy_qp(struct ib_qp *qp) 3574 { 3575 return ib_destroy_qp_user(qp, NULL); 3576 } 3577 3578 /** 3579 * ib_open_qp - Obtain a reference to an existing sharable QP. 3580 * @xrcd - XRC domain 3581 * @qp_open_attr: Attributes identifying the QP to open. 3582 * 3583 * Returns a reference to a sharable QP. 3584 */ 3585 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 3586 struct ib_qp_open_attr *qp_open_attr); 3587 3588 /** 3589 * ib_close_qp - Release an external reference to a QP. 3590 * @qp: The QP handle to release 3591 * 3592 * The opened QP handle is released by the caller. The underlying 3593 * shared QP is not destroyed until all internal references are released. 3594 */ 3595 int ib_close_qp(struct ib_qp *qp); 3596 3597 /** 3598 * ib_post_send - Posts a list of work requests to the send queue of 3599 * the specified QP. 3600 * @qp: The QP to post the work request on. 3601 * @send_wr: A list of work requests to post on the send queue. 3602 * @bad_send_wr: On an immediate failure, this parameter will reference 3603 * the work request that failed to be posted on the QP. 3604 * 3605 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate 3606 * error is returned, the QP state shall not be affected, 3607 * ib_post_send() will return an immediate error after queueing any 3608 * earlier work requests in the list. 3609 */ 3610 static inline int ib_post_send(struct ib_qp *qp, 3611 const struct ib_send_wr *send_wr, 3612 const struct ib_send_wr **bad_send_wr) 3613 { 3614 const struct ib_send_wr *dummy; 3615 3616 return qp->device->ops.post_send(qp, send_wr, bad_send_wr ? : &dummy); 3617 } 3618 3619 /** 3620 * ib_post_recv - Posts a list of work requests to the receive queue of 3621 * the specified QP. 3622 * @qp: The QP to post the work request on. 3623 * @recv_wr: A list of work requests to post on the receive queue. 3624 * @bad_recv_wr: On an immediate failure, this parameter will reference 3625 * the work request that failed to be posted on the QP. 3626 */ 3627 static inline int ib_post_recv(struct ib_qp *qp, 3628 const struct ib_recv_wr *recv_wr, 3629 const struct ib_recv_wr **bad_recv_wr) 3630 { 3631 const struct ib_recv_wr *dummy; 3632 3633 return qp->device->ops.post_recv(qp, recv_wr, bad_recv_wr ? : &dummy); 3634 } 3635 3636 struct ib_cq *__ib_alloc_cq_user(struct ib_device *dev, void *private, 3637 int nr_cqe, int comp_vector, 3638 enum ib_poll_context poll_ctx, 3639 const char *caller, struct ib_udata *udata); 3640 3641 /** 3642 * ib_alloc_cq_user: Allocate kernel/user CQ 3643 * @dev: The IB device 3644 * @private: Private data attached to the CQE 3645 * @nr_cqe: Number of CQEs in the CQ 3646 * @comp_vector: Completion vector used for the IRQs 3647 * @poll_ctx: Context used for polling the CQ 3648 * @udata: Valid user data or NULL for kernel objects 3649 */ 3650 static inline struct ib_cq *ib_alloc_cq_user(struct ib_device *dev, 3651 void *private, int nr_cqe, 3652 int comp_vector, 3653 enum ib_poll_context poll_ctx, 3654 struct ib_udata *udata) 3655 { 3656 return __ib_alloc_cq_user(dev, private, nr_cqe, comp_vector, poll_ctx, 3657 KBUILD_MODNAME, udata); 3658 } 3659 3660 /** 3661 * ib_alloc_cq: Allocate kernel CQ 3662 * @dev: The IB device 3663 * @private: Private data attached to the CQE 3664 * @nr_cqe: Number of CQEs in the CQ 3665 * @comp_vector: Completion vector used for the IRQs 3666 * @poll_ctx: Context used for polling the CQ 3667 * 3668 * NOTE: for user cq use ib_alloc_cq_user with valid udata! 3669 */ 3670 static inline struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private, 3671 int nr_cqe, int comp_vector, 3672 enum ib_poll_context poll_ctx) 3673 { 3674 return ib_alloc_cq_user(dev, private, nr_cqe, comp_vector, poll_ctx, 3675 NULL); 3676 } 3677 3678 /** 3679 * ib_free_cq_user - Free kernel/user CQ 3680 * @cq: The CQ to free 3681 * @udata: Valid user data or NULL for kernel objects 3682 */ 3683 void ib_free_cq_user(struct ib_cq *cq, struct ib_udata *udata); 3684 3685 /** 3686 * ib_free_cq - Free kernel CQ 3687 * @cq: The CQ to free 3688 * 3689 * NOTE: for user cq use ib_free_cq_user with valid udata! 3690 */ 3691 static inline void ib_free_cq(struct ib_cq *cq) 3692 { 3693 ib_free_cq_user(cq, NULL); 3694 } 3695 3696 int ib_process_cq_direct(struct ib_cq *cq, int budget); 3697 3698 /** 3699 * ib_create_cq - Creates a CQ on the specified device. 3700 * @device: The device on which to create the CQ. 3701 * @comp_handler: A user-specified callback that is invoked when a 3702 * completion event occurs on the CQ. 3703 * @event_handler: A user-specified callback that is invoked when an 3704 * asynchronous event not associated with a completion occurs on the CQ. 3705 * @cq_context: Context associated with the CQ returned to the user via 3706 * the associated completion and event handlers. 3707 * @cq_attr: The attributes the CQ should be created upon. 3708 * 3709 * Users can examine the cq structure to determine the actual CQ size. 3710 */ 3711 struct ib_cq *__ib_create_cq(struct ib_device *device, 3712 ib_comp_handler comp_handler, 3713 void (*event_handler)(struct ib_event *, void *), 3714 void *cq_context, 3715 const struct ib_cq_init_attr *cq_attr, 3716 const char *caller); 3717 #define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \ 3718 __ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), KBUILD_MODNAME) 3719 3720 /** 3721 * ib_resize_cq - Modifies the capacity of the CQ. 3722 * @cq: The CQ to resize. 3723 * @cqe: The minimum size of the CQ. 3724 * 3725 * Users can examine the cq structure to determine the actual CQ size. 3726 */ 3727 int ib_resize_cq(struct ib_cq *cq, int cqe); 3728 3729 /** 3730 * rdma_set_cq_moderation - Modifies moderation params of the CQ 3731 * @cq: The CQ to modify. 3732 * @cq_count: number of CQEs that will trigger an event 3733 * @cq_period: max period of time in usec before triggering an event 3734 * 3735 */ 3736 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period); 3737 3738 /** 3739 * ib_destroy_cq_user - Destroys the specified CQ. 3740 * @cq: The CQ to destroy. 3741 * @udata: Valid user data or NULL for kernel objects 3742 */ 3743 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata); 3744 3745 /** 3746 * ib_destroy_cq - Destroys the specified kernel CQ. 3747 * @cq: The CQ to destroy. 3748 * 3749 * NOTE: for user cq use ib_destroy_cq_user with valid udata! 3750 */ 3751 static inline void ib_destroy_cq(struct ib_cq *cq) 3752 { 3753 ib_destroy_cq_user(cq, NULL); 3754 } 3755 3756 /** 3757 * ib_poll_cq - poll a CQ for completion(s) 3758 * @cq:the CQ being polled 3759 * @num_entries:maximum number of completions to return 3760 * @wc:array of at least @num_entries &struct ib_wc where completions 3761 * will be returned 3762 * 3763 * Poll a CQ for (possibly multiple) completions. If the return value 3764 * is < 0, an error occurred. If the return value is >= 0, it is the 3765 * number of completions returned. If the return value is 3766 * non-negative and < num_entries, then the CQ was emptied. 3767 */ 3768 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries, 3769 struct ib_wc *wc) 3770 { 3771 return cq->device->ops.poll_cq(cq, num_entries, wc); 3772 } 3773 3774 /** 3775 * ib_req_notify_cq - Request completion notification on a CQ. 3776 * @cq: The CQ to generate an event for. 3777 * @flags: 3778 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP 3779 * to request an event on the next solicited event or next work 3780 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS 3781 * may also be |ed in to request a hint about missed events, as 3782 * described below. 3783 * 3784 * Return Value: 3785 * < 0 means an error occurred while requesting notification 3786 * == 0 means notification was requested successfully, and if 3787 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events 3788 * were missed and it is safe to wait for another event. In 3789 * this case is it guaranteed that any work completions added 3790 * to the CQ since the last CQ poll will trigger a completion 3791 * notification event. 3792 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed 3793 * in. It means that the consumer must poll the CQ again to 3794 * make sure it is empty to avoid missing an event because of a 3795 * race between requesting notification and an entry being 3796 * added to the CQ. This return value means it is possible 3797 * (but not guaranteed) that a work completion has been added 3798 * to the CQ since the last poll without triggering a 3799 * completion notification event. 3800 */ 3801 static inline int ib_req_notify_cq(struct ib_cq *cq, 3802 enum ib_cq_notify_flags flags) 3803 { 3804 return cq->device->ops.req_notify_cq(cq, flags); 3805 } 3806 3807 /** 3808 * ib_req_ncomp_notif - Request completion notification when there are 3809 * at least the specified number of unreaped completions on the CQ. 3810 * @cq: The CQ to generate an event for. 3811 * @wc_cnt: The number of unreaped completions that should be on the 3812 * CQ before an event is generated. 3813 */ 3814 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt) 3815 { 3816 return cq->device->ops.req_ncomp_notif ? 3817 cq->device->ops.req_ncomp_notif(cq, wc_cnt) : 3818 -ENOSYS; 3819 } 3820 3821 /** 3822 * ib_dma_mapping_error - check a DMA addr for error 3823 * @dev: The device for which the dma_addr was created 3824 * @dma_addr: The DMA address to check 3825 */ 3826 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr) 3827 { 3828 return dma_mapping_error(dev->dma_device, dma_addr); 3829 } 3830 3831 /** 3832 * ib_dma_map_single - Map a kernel virtual address to DMA address 3833 * @dev: The device for which the dma_addr is to be created 3834 * @cpu_addr: The kernel virtual address 3835 * @size: The size of the region in bytes 3836 * @direction: The direction of the DMA 3837 */ 3838 static inline u64 ib_dma_map_single(struct ib_device *dev, 3839 void *cpu_addr, size_t size, 3840 enum dma_data_direction direction) 3841 { 3842 return dma_map_single(dev->dma_device, cpu_addr, size, direction); 3843 } 3844 3845 /** 3846 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single() 3847 * @dev: The device for which the DMA address was created 3848 * @addr: The DMA address 3849 * @size: The size of the region in bytes 3850 * @direction: The direction of the DMA 3851 */ 3852 static inline void ib_dma_unmap_single(struct ib_device *dev, 3853 u64 addr, size_t size, 3854 enum dma_data_direction direction) 3855 { 3856 dma_unmap_single(dev->dma_device, addr, size, direction); 3857 } 3858 3859 /** 3860 * ib_dma_map_page - Map a physical page to DMA address 3861 * @dev: The device for which the dma_addr is to be created 3862 * @page: The page to be mapped 3863 * @offset: The offset within the page 3864 * @size: The size of the region in bytes 3865 * @direction: The direction of the DMA 3866 */ 3867 static inline u64 ib_dma_map_page(struct ib_device *dev, 3868 struct page *page, 3869 unsigned long offset, 3870 size_t size, 3871 enum dma_data_direction direction) 3872 { 3873 return dma_map_page(dev->dma_device, page, offset, size, direction); 3874 } 3875 3876 /** 3877 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page() 3878 * @dev: The device for which the DMA address was created 3879 * @addr: The DMA address 3880 * @size: The size of the region in bytes 3881 * @direction: The direction of the DMA 3882 */ 3883 static inline void ib_dma_unmap_page(struct ib_device *dev, 3884 u64 addr, size_t size, 3885 enum dma_data_direction direction) 3886 { 3887 dma_unmap_page(dev->dma_device, addr, size, direction); 3888 } 3889 3890 /** 3891 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses 3892 * @dev: The device for which the DMA addresses are to be created 3893 * @sg: The array of scatter/gather entries 3894 * @nents: The number of scatter/gather entries 3895 * @direction: The direction of the DMA 3896 */ 3897 static inline int ib_dma_map_sg(struct ib_device *dev, 3898 struct scatterlist *sg, int nents, 3899 enum dma_data_direction direction) 3900 { 3901 return dma_map_sg(dev->dma_device, sg, nents, direction); 3902 } 3903 3904 /** 3905 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses 3906 * @dev: The device for which the DMA addresses were created 3907 * @sg: The array of scatter/gather entries 3908 * @nents: The number of scatter/gather entries 3909 * @direction: The direction of the DMA 3910 */ 3911 static inline void ib_dma_unmap_sg(struct ib_device *dev, 3912 struct scatterlist *sg, int nents, 3913 enum dma_data_direction direction) 3914 { 3915 dma_unmap_sg(dev->dma_device, sg, nents, direction); 3916 } 3917 3918 static inline int ib_dma_map_sg_attrs(struct ib_device *dev, 3919 struct scatterlist *sg, int nents, 3920 enum dma_data_direction direction, 3921 unsigned long dma_attrs) 3922 { 3923 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, 3924 dma_attrs); 3925 } 3926 3927 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev, 3928 struct scatterlist *sg, int nents, 3929 enum dma_data_direction direction, 3930 unsigned long dma_attrs) 3931 { 3932 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, dma_attrs); 3933 } 3934 3935 /** 3936 * ib_dma_max_seg_size - Return the size limit of a single DMA transfer 3937 * @dev: The device to query 3938 * 3939 * The returned value represents a size in bytes. 3940 */ 3941 static inline unsigned int ib_dma_max_seg_size(struct ib_device *dev) 3942 { 3943 struct device_dma_parameters *p = dev->dma_device->dma_parms; 3944 3945 return p ? p->max_segment_size : UINT_MAX; 3946 } 3947 3948 /** 3949 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU 3950 * @dev: The device for which the DMA address was created 3951 * @addr: The DMA address 3952 * @size: The size of the region in bytes 3953 * @dir: The direction of the DMA 3954 */ 3955 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev, 3956 u64 addr, 3957 size_t size, 3958 enum dma_data_direction dir) 3959 { 3960 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir); 3961 } 3962 3963 /** 3964 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device 3965 * @dev: The device for which the DMA address was created 3966 * @addr: The DMA address 3967 * @size: The size of the region in bytes 3968 * @dir: The direction of the DMA 3969 */ 3970 static inline void ib_dma_sync_single_for_device(struct ib_device *dev, 3971 u64 addr, 3972 size_t size, 3973 enum dma_data_direction dir) 3974 { 3975 dma_sync_single_for_device(dev->dma_device, addr, size, dir); 3976 } 3977 3978 /** 3979 * ib_dma_alloc_coherent - Allocate memory and map it for DMA 3980 * @dev: The device for which the DMA address is requested 3981 * @size: The size of the region to allocate in bytes 3982 * @dma_handle: A pointer for returning the DMA address of the region 3983 * @flag: memory allocator flags 3984 */ 3985 static inline void *ib_dma_alloc_coherent(struct ib_device *dev, 3986 size_t size, 3987 dma_addr_t *dma_handle, 3988 gfp_t flag) 3989 { 3990 return dma_alloc_coherent(dev->dma_device, size, dma_handle, flag); 3991 } 3992 3993 /** 3994 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent() 3995 * @dev: The device for which the DMA addresses were allocated 3996 * @size: The size of the region 3997 * @cpu_addr: the address returned by ib_dma_alloc_coherent() 3998 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent() 3999 */ 4000 static inline void ib_dma_free_coherent(struct ib_device *dev, 4001 size_t size, void *cpu_addr, 4002 dma_addr_t dma_handle) 4003 { 4004 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle); 4005 } 4006 4007 /** 4008 * ib_dereg_mr_user - Deregisters a memory region and removes it from the 4009 * HCA translation table. 4010 * @mr: The memory region to deregister. 4011 * @udata: Valid user data or NULL for kernel object 4012 * 4013 * This function can fail, if the memory region has memory windows bound to it. 4014 */ 4015 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata); 4016 4017 /** 4018 * ib_dereg_mr - Deregisters a kernel memory region and removes it from the 4019 * HCA translation table. 4020 * @mr: The memory region to deregister. 4021 * 4022 * This function can fail, if the memory region has memory windows bound to it. 4023 * 4024 * NOTE: for user mr use ib_dereg_mr_user with valid udata! 4025 */ 4026 static inline int ib_dereg_mr(struct ib_mr *mr) 4027 { 4028 return ib_dereg_mr_user(mr, NULL); 4029 } 4030 4031 struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type, 4032 u32 max_num_sg, struct ib_udata *udata); 4033 4034 static inline struct ib_mr *ib_alloc_mr(struct ib_pd *pd, 4035 enum ib_mr_type mr_type, u32 max_num_sg) 4036 { 4037 return ib_alloc_mr_user(pd, mr_type, max_num_sg, NULL); 4038 } 4039 4040 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd, 4041 u32 max_num_data_sg, 4042 u32 max_num_meta_sg); 4043 4044 /** 4045 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR 4046 * R_Key and L_Key. 4047 * @mr - struct ib_mr pointer to be updated. 4048 * @newkey - new key to be used. 4049 */ 4050 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey) 4051 { 4052 mr->lkey = (mr->lkey & 0xffffff00) | newkey; 4053 mr->rkey = (mr->rkey & 0xffffff00) | newkey; 4054 } 4055 4056 /** 4057 * ib_inc_rkey - increments the key portion of the given rkey. Can be used 4058 * for calculating a new rkey for type 2 memory windows. 4059 * @rkey - the rkey to increment. 4060 */ 4061 static inline u32 ib_inc_rkey(u32 rkey) 4062 { 4063 const u32 mask = 0x000000ff; 4064 return ((rkey + 1) & mask) | (rkey & ~mask); 4065 } 4066 4067 /** 4068 * ib_alloc_fmr - Allocates a unmapped fast memory region. 4069 * @pd: The protection domain associated with the unmapped region. 4070 * @mr_access_flags: Specifies the memory access rights. 4071 * @fmr_attr: Attributes of the unmapped region. 4072 * 4073 * A fast memory region must be mapped before it can be used as part of 4074 * a work request. 4075 */ 4076 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 4077 int mr_access_flags, 4078 struct ib_fmr_attr *fmr_attr); 4079 4080 /** 4081 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region. 4082 * @fmr: The fast memory region to associate with the pages. 4083 * @page_list: An array of physical pages to map to the fast memory region. 4084 * @list_len: The number of pages in page_list. 4085 * @iova: The I/O virtual address to use with the mapped region. 4086 */ 4087 static inline int ib_map_phys_fmr(struct ib_fmr *fmr, 4088 u64 *page_list, int list_len, 4089 u64 iova) 4090 { 4091 return fmr->device->ops.map_phys_fmr(fmr, page_list, list_len, iova); 4092 } 4093 4094 /** 4095 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions. 4096 * @fmr_list: A linked list of fast memory regions to unmap. 4097 */ 4098 int ib_unmap_fmr(struct list_head *fmr_list); 4099 4100 /** 4101 * ib_dealloc_fmr - Deallocates a fast memory region. 4102 * @fmr: The fast memory region to deallocate. 4103 */ 4104 int ib_dealloc_fmr(struct ib_fmr *fmr); 4105 4106 /** 4107 * ib_attach_mcast - Attaches the specified QP to a multicast group. 4108 * @qp: QP to attach to the multicast group. The QP must be type 4109 * IB_QPT_UD. 4110 * @gid: Multicast group GID. 4111 * @lid: Multicast group LID in host byte order. 4112 * 4113 * In order to send and receive multicast packets, subnet 4114 * administration must have created the multicast group and configured 4115 * the fabric appropriately. The port associated with the specified 4116 * QP must also be a member of the multicast group. 4117 */ 4118 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 4119 4120 /** 4121 * ib_detach_mcast - Detaches the specified QP from a multicast group. 4122 * @qp: QP to detach from the multicast group. 4123 * @gid: Multicast group GID. 4124 * @lid: Multicast group LID in host byte order. 4125 */ 4126 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); 4127 4128 /** 4129 * ib_alloc_xrcd - Allocates an XRC domain. 4130 * @device: The device on which to allocate the XRC domain. 4131 * @caller: Module name for kernel consumers 4132 */ 4133 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller); 4134 #define ib_alloc_xrcd(device) \ 4135 __ib_alloc_xrcd((device), KBUILD_MODNAME) 4136 4137 /** 4138 * ib_dealloc_xrcd - Deallocates an XRC domain. 4139 * @xrcd: The XRC domain to deallocate. 4140 * @udata: Valid user data or NULL for kernel object 4141 */ 4142 int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata); 4143 4144 static inline int ib_check_mr_access(int flags) 4145 { 4146 /* 4147 * Local write permission is required if remote write or 4148 * remote atomic permission is also requested. 4149 */ 4150 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && 4151 !(flags & IB_ACCESS_LOCAL_WRITE)) 4152 return -EINVAL; 4153 4154 return 0; 4155 } 4156 4157 static inline bool ib_access_writable(int access_flags) 4158 { 4159 /* 4160 * We have writable memory backing the MR if any of the following 4161 * access flags are set. "Local write" and "remote write" obviously 4162 * require write access. "Remote atomic" can do things like fetch and 4163 * add, which will modify memory, and "MW bind" can change permissions 4164 * by binding a window. 4165 */ 4166 return access_flags & 4167 (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | 4168 IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND); 4169 } 4170 4171 /** 4172 * ib_check_mr_status: lightweight check of MR status. 4173 * This routine may provide status checks on a selected 4174 * ib_mr. first use is for signature status check. 4175 * 4176 * @mr: A memory region. 4177 * @check_mask: Bitmask of which checks to perform from 4178 * ib_mr_status_check enumeration. 4179 * @mr_status: The container of relevant status checks. 4180 * failed checks will be indicated in the status bitmask 4181 * and the relevant info shall be in the error item. 4182 */ 4183 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 4184 struct ib_mr_status *mr_status); 4185 4186 /** 4187 * ib_device_try_get: Hold a registration lock 4188 * device: The device to lock 4189 * 4190 * A device under an active registration lock cannot become unregistered. It 4191 * is only possible to obtain a registration lock on a device that is fully 4192 * registered, otherwise this function returns false. 4193 * 4194 * The registration lock is only necessary for actions which require the 4195 * device to still be registered. Uses that only require the device pointer to 4196 * be valid should use get_device(&ibdev->dev) to hold the memory. 4197 * 4198 */ 4199 static inline bool ib_device_try_get(struct ib_device *dev) 4200 { 4201 return refcount_inc_not_zero(&dev->refcount); 4202 } 4203 4204 void ib_device_put(struct ib_device *device); 4205 struct ib_device *ib_device_get_by_netdev(struct net_device *ndev, 4206 enum rdma_driver_id driver_id); 4207 struct ib_device *ib_device_get_by_name(const char *name, 4208 enum rdma_driver_id driver_id); 4209 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, 4210 u16 pkey, const union ib_gid *gid, 4211 const struct sockaddr *addr); 4212 int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev, 4213 unsigned int port); 4214 struct net_device *ib_device_netdev(struct ib_device *dev, u8 port); 4215 4216 struct ib_wq *ib_create_wq(struct ib_pd *pd, 4217 struct ib_wq_init_attr *init_attr); 4218 int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata); 4219 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *attr, 4220 u32 wq_attr_mask); 4221 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 4222 struct ib_rwq_ind_table_init_attr* 4223 wq_ind_table_init_attr); 4224 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table); 4225 4226 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 4227 unsigned int *sg_offset, unsigned int page_size); 4228 int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg, 4229 int data_sg_nents, unsigned int *data_sg_offset, 4230 struct scatterlist *meta_sg, int meta_sg_nents, 4231 unsigned int *meta_sg_offset, unsigned int page_size); 4232 4233 static inline int 4234 ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 4235 unsigned int *sg_offset, unsigned int page_size) 4236 { 4237 int n; 4238 4239 n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, page_size); 4240 mr->iova = 0; 4241 4242 return n; 4243 } 4244 4245 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 4246 unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64)); 4247 4248 void ib_drain_rq(struct ib_qp *qp); 4249 void ib_drain_sq(struct ib_qp *qp); 4250 void ib_drain_qp(struct ib_qp *qp); 4251 4252 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width); 4253 4254 static inline u8 *rdma_ah_retrieve_dmac(struct rdma_ah_attr *attr) 4255 { 4256 if (attr->type == RDMA_AH_ATTR_TYPE_ROCE) 4257 return attr->roce.dmac; 4258 return NULL; 4259 } 4260 4261 static inline void rdma_ah_set_dlid(struct rdma_ah_attr *attr, u32 dlid) 4262 { 4263 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4264 attr->ib.dlid = (u16)dlid; 4265 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4266 attr->opa.dlid = dlid; 4267 } 4268 4269 static inline u32 rdma_ah_get_dlid(const struct rdma_ah_attr *attr) 4270 { 4271 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4272 return attr->ib.dlid; 4273 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4274 return attr->opa.dlid; 4275 return 0; 4276 } 4277 4278 static inline void rdma_ah_set_sl(struct rdma_ah_attr *attr, u8 sl) 4279 { 4280 attr->sl = sl; 4281 } 4282 4283 static inline u8 rdma_ah_get_sl(const struct rdma_ah_attr *attr) 4284 { 4285 return attr->sl; 4286 } 4287 4288 static inline void rdma_ah_set_path_bits(struct rdma_ah_attr *attr, 4289 u8 src_path_bits) 4290 { 4291 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4292 attr->ib.src_path_bits = src_path_bits; 4293 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4294 attr->opa.src_path_bits = src_path_bits; 4295 } 4296 4297 static inline u8 rdma_ah_get_path_bits(const struct rdma_ah_attr *attr) 4298 { 4299 if (attr->type == RDMA_AH_ATTR_TYPE_IB) 4300 return attr->ib.src_path_bits; 4301 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4302 return attr->opa.src_path_bits; 4303 return 0; 4304 } 4305 4306 static inline void rdma_ah_set_make_grd(struct rdma_ah_attr *attr, 4307 bool make_grd) 4308 { 4309 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4310 attr->opa.make_grd = make_grd; 4311 } 4312 4313 static inline bool rdma_ah_get_make_grd(const struct rdma_ah_attr *attr) 4314 { 4315 if (attr->type == RDMA_AH_ATTR_TYPE_OPA) 4316 return attr->opa.make_grd; 4317 return false; 4318 } 4319 4320 static inline void rdma_ah_set_port_num(struct rdma_ah_attr *attr, u8 port_num) 4321 { 4322 attr->port_num = port_num; 4323 } 4324 4325 static inline u8 rdma_ah_get_port_num(const struct rdma_ah_attr *attr) 4326 { 4327 return attr->port_num; 4328 } 4329 4330 static inline void rdma_ah_set_static_rate(struct rdma_ah_attr *attr, 4331 u8 static_rate) 4332 { 4333 attr->static_rate = static_rate; 4334 } 4335 4336 static inline u8 rdma_ah_get_static_rate(const struct rdma_ah_attr *attr) 4337 { 4338 return attr->static_rate; 4339 } 4340 4341 static inline void rdma_ah_set_ah_flags(struct rdma_ah_attr *attr, 4342 enum ib_ah_flags flag) 4343 { 4344 attr->ah_flags = flag; 4345 } 4346 4347 static inline enum ib_ah_flags 4348 rdma_ah_get_ah_flags(const struct rdma_ah_attr *attr) 4349 { 4350 return attr->ah_flags; 4351 } 4352 4353 static inline const struct ib_global_route 4354 *rdma_ah_read_grh(const struct rdma_ah_attr *attr) 4355 { 4356 return &attr->grh; 4357 } 4358 4359 /*To retrieve and modify the grh */ 4360 static inline struct ib_global_route 4361 *rdma_ah_retrieve_grh(struct rdma_ah_attr *attr) 4362 { 4363 return &attr->grh; 4364 } 4365 4366 static inline void rdma_ah_set_dgid_raw(struct rdma_ah_attr *attr, void *dgid) 4367 { 4368 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4369 4370 memcpy(grh->dgid.raw, dgid, sizeof(grh->dgid)); 4371 } 4372 4373 static inline void rdma_ah_set_subnet_prefix(struct rdma_ah_attr *attr, 4374 __be64 prefix) 4375 { 4376 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4377 4378 grh->dgid.global.subnet_prefix = prefix; 4379 } 4380 4381 static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr, 4382 __be64 if_id) 4383 { 4384 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4385 4386 grh->dgid.global.interface_id = if_id; 4387 } 4388 4389 static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr, 4390 union ib_gid *dgid, u32 flow_label, 4391 u8 sgid_index, u8 hop_limit, 4392 u8 traffic_class) 4393 { 4394 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); 4395 4396 attr->ah_flags = IB_AH_GRH; 4397 if (dgid) 4398 grh->dgid = *dgid; 4399 grh->flow_label = flow_label; 4400 grh->sgid_index = sgid_index; 4401 grh->hop_limit = hop_limit; 4402 grh->traffic_class = traffic_class; 4403 grh->sgid_attr = NULL; 4404 } 4405 4406 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr); 4407 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid, 4408 u32 flow_label, u8 hop_limit, u8 traffic_class, 4409 const struct ib_gid_attr *sgid_attr); 4410 void rdma_copy_ah_attr(struct rdma_ah_attr *dest, 4411 const struct rdma_ah_attr *src); 4412 void rdma_replace_ah_attr(struct rdma_ah_attr *old, 4413 const struct rdma_ah_attr *new); 4414 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src); 4415 4416 /** 4417 * rdma_ah_find_type - Return address handle type. 4418 * 4419 * @dev: Device to be checked 4420 * @port_num: Port number 4421 */ 4422 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev, 4423 u8 port_num) 4424 { 4425 if (rdma_protocol_roce(dev, port_num)) 4426 return RDMA_AH_ATTR_TYPE_ROCE; 4427 if (rdma_protocol_ib(dev, port_num)) { 4428 if (rdma_cap_opa_ah(dev, port_num)) 4429 return RDMA_AH_ATTR_TYPE_OPA; 4430 return RDMA_AH_ATTR_TYPE_IB; 4431 } 4432 4433 return RDMA_AH_ATTR_TYPE_UNDEFINED; 4434 } 4435 4436 /** 4437 * ib_lid_cpu16 - Return lid in 16bit CPU encoding. 4438 * In the current implementation the only way to get 4439 * get the 32bit lid is from other sources for OPA. 4440 * For IB, lids will always be 16bits so cast the 4441 * value accordingly. 4442 * 4443 * @lid: A 32bit LID 4444 */ 4445 static inline u16 ib_lid_cpu16(u32 lid) 4446 { 4447 WARN_ON_ONCE(lid & 0xFFFF0000); 4448 return (u16)lid; 4449 } 4450 4451 /** 4452 * ib_lid_be16 - Return lid in 16bit BE encoding. 4453 * 4454 * @lid: A 32bit LID 4455 */ 4456 static inline __be16 ib_lid_be16(u32 lid) 4457 { 4458 WARN_ON_ONCE(lid & 0xFFFF0000); 4459 return cpu_to_be16((u16)lid); 4460 } 4461 4462 /** 4463 * ib_get_vector_affinity - Get the affinity mappings of a given completion 4464 * vector 4465 * @device: the rdma device 4466 * @comp_vector: index of completion vector 4467 * 4468 * Returns NULL on failure, otherwise a corresponding cpu map of the 4469 * completion vector (returns all-cpus map if the device driver doesn't 4470 * implement get_vector_affinity). 4471 */ 4472 static inline const struct cpumask * 4473 ib_get_vector_affinity(struct ib_device *device, int comp_vector) 4474 { 4475 if (comp_vector < 0 || comp_vector >= device->num_comp_vectors || 4476 !device->ops.get_vector_affinity) 4477 return NULL; 4478 4479 return device->ops.get_vector_affinity(device, comp_vector); 4480 4481 } 4482 4483 /** 4484 * rdma_roce_rescan_device - Rescan all of the network devices in the system 4485 * and add their gids, as needed, to the relevant RoCE devices. 4486 * 4487 * @device: the rdma device 4488 */ 4489 void rdma_roce_rescan_device(struct ib_device *ibdev); 4490 4491 struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile); 4492 4493 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs); 4494 4495 struct net_device *rdma_alloc_netdev(struct ib_device *device, u8 port_num, 4496 enum rdma_netdev_t type, const char *name, 4497 unsigned char name_assign_type, 4498 void (*setup)(struct net_device *)); 4499 4500 int rdma_init_netdev(struct ib_device *device, u8 port_num, 4501 enum rdma_netdev_t type, const char *name, 4502 unsigned char name_assign_type, 4503 void (*setup)(struct net_device *), 4504 struct net_device *netdev); 4505 4506 /** 4507 * rdma_set_device_sysfs_group - Set device attributes group to have 4508 * driver specific sysfs entries at 4509 * for infiniband class. 4510 * 4511 * @device: device pointer for which attributes to be created 4512 * @group: Pointer to group which should be added when device 4513 * is registered with sysfs. 4514 * rdma_set_device_sysfs_group() allows existing drivers to expose one 4515 * group per device to have sysfs attributes. 4516 * 4517 * NOTE: New drivers should not make use of this API; instead new device 4518 * parameter should be exposed via netlink command. This API and mechanism 4519 * exist only for existing drivers. 4520 */ 4521 static inline void 4522 rdma_set_device_sysfs_group(struct ib_device *dev, 4523 const struct attribute_group *group) 4524 { 4525 dev->groups[1] = group; 4526 } 4527 4528 /** 4529 * rdma_device_to_ibdev - Get ib_device pointer from device pointer 4530 * 4531 * @device: device pointer for which ib_device pointer to retrieve 4532 * 4533 * rdma_device_to_ibdev() retrieves ib_device pointer from device. 4534 * 4535 */ 4536 static inline struct ib_device *rdma_device_to_ibdev(struct device *device) 4537 { 4538 struct ib_core_device *coredev = 4539 container_of(device, struct ib_core_device, dev); 4540 4541 return coredev->owner; 4542 } 4543 4544 /** 4545 * rdma_device_to_drv_device - Helper macro to reach back to driver's 4546 * ib_device holder structure from device pointer. 4547 * 4548 * NOTE: New drivers should not make use of this API; This API is only for 4549 * existing drivers who have exposed sysfs entries using 4550 * rdma_set_device_sysfs_group(). 4551 */ 4552 #define rdma_device_to_drv_device(dev, drv_dev_struct, ibdev_member) \ 4553 container_of(rdma_device_to_ibdev(dev), drv_dev_struct, ibdev_member) 4554 4555 bool rdma_dev_access_netns(const struct ib_device *device, 4556 const struct net *net); 4557 #endif /* IB_VERBS_H */ 4558