1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 5 */ 6 7 #ifndef RXE_VERBS_H 8 #define RXE_VERBS_H 9 10 #include <linux/interrupt.h> 11 #include <linux/workqueue.h> 12 #include "rxe_pool.h" 13 #include "rxe_task.h" 14 #include "rxe_hw_counters.h" 15 pkey_match(u16 key1,u16 key2)16 static inline int pkey_match(u16 key1, u16 key2) 17 { 18 return (((key1 & 0x7fff) != 0) && 19 ((key1 & 0x7fff) == (key2 & 0x7fff)) && 20 ((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0; 21 } 22 23 /* Return >0 if psn_a > psn_b 24 * 0 if psn_a == psn_b 25 * <0 if psn_a < psn_b 26 */ psn_compare(u32 psn_a,u32 psn_b)27 static inline int psn_compare(u32 psn_a, u32 psn_b) 28 { 29 s32 diff; 30 31 diff = (psn_a - psn_b) << 8; 32 return diff; 33 } 34 35 struct rxe_ucontext { 36 struct ib_ucontext ibuc; 37 struct rxe_pool_elem elem; 38 }; 39 40 struct rxe_pd { 41 struct ib_pd ibpd; 42 struct rxe_pool_elem elem; 43 }; 44 45 struct rxe_ah { 46 struct ib_ah ibah; 47 struct rxe_pool_elem elem; 48 struct rxe_av av; 49 bool is_user; 50 int ah_num; 51 }; 52 53 struct rxe_cqe { 54 union { 55 struct ib_wc ibwc; 56 struct ib_uverbs_wc uibwc; 57 }; 58 }; 59 60 struct rxe_cq { 61 struct ib_cq ibcq; 62 struct rxe_pool_elem elem; 63 struct rxe_queue *queue; 64 spinlock_t cq_lock; 65 u8 notify; 66 bool is_dying; 67 bool is_user; 68 struct tasklet_struct comp_task; 69 atomic_t num_wq; 70 }; 71 72 enum wqe_state { 73 wqe_state_posted, 74 wqe_state_processing, 75 wqe_state_pending, 76 wqe_state_done, 77 wqe_state_error, 78 }; 79 80 struct rxe_sq { 81 int max_wr; 82 int max_sge; 83 int max_inline; 84 spinlock_t sq_lock; /* guard queue */ 85 struct rxe_queue *queue; 86 }; 87 88 struct rxe_rq { 89 int max_wr; 90 int max_sge; 91 spinlock_t producer_lock; /* guard queue producer */ 92 spinlock_t consumer_lock; /* guard queue consumer */ 93 struct rxe_queue *queue; 94 }; 95 96 struct rxe_srq { 97 struct ib_srq ibsrq; 98 struct rxe_pool_elem elem; 99 struct rxe_pd *pd; 100 struct rxe_rq rq; 101 u32 srq_num; 102 103 int limit; 104 int error; 105 }; 106 107 enum rxe_qp_state { 108 QP_STATE_RESET, 109 QP_STATE_INIT, 110 QP_STATE_READY, 111 QP_STATE_DRAIN, /* req only */ 112 QP_STATE_DRAINED, /* req only */ 113 QP_STATE_ERROR 114 }; 115 116 struct rxe_req_info { 117 enum rxe_qp_state state; 118 int wqe_index; 119 u32 psn; 120 int opcode; 121 atomic_t rd_atomic; 122 int wait_fence; 123 int need_rd_atomic; 124 int wait_psn; 125 int need_retry; 126 int wait_for_rnr_timer; 127 int noack_pkts; 128 struct rxe_task task; 129 }; 130 131 struct rxe_comp_info { 132 enum rxe_qp_state state; 133 u32 psn; 134 int opcode; 135 int timeout; 136 int timeout_retry; 137 int started_retry; 138 u32 retry_cnt; 139 u32 rnr_retry; 140 struct rxe_task task; 141 }; 142 143 enum rdatm_res_state { 144 rdatm_res_state_next, 145 rdatm_res_state_new, 146 rdatm_res_state_replay, 147 }; 148 149 struct resp_res { 150 int type; 151 int replay; 152 u32 first_psn; 153 u32 last_psn; 154 u32 cur_psn; 155 enum rdatm_res_state state; 156 157 union { 158 struct { 159 u64 orig_val; 160 } atomic; 161 struct { 162 u64 va_org; 163 u32 rkey; 164 u32 length; 165 u64 va; 166 u32 resid; 167 } read; 168 }; 169 }; 170 171 struct rxe_resp_info { 172 enum rxe_qp_state state; 173 u32 msn; 174 u32 psn; 175 u32 ack_psn; 176 int opcode; 177 int drop_msg; 178 int goto_error; 179 int sent_psn_nak; 180 enum ib_wc_status status; 181 u8 aeth_syndrome; 182 183 /* Receive only */ 184 struct rxe_recv_wqe *wqe; 185 186 /* RDMA read / atomic only */ 187 u64 va; 188 u64 offset; 189 struct rxe_mr *mr; 190 u32 resid; 191 u32 rkey; 192 u32 length; 193 194 /* SRQ only */ 195 struct { 196 struct rxe_recv_wqe wqe; 197 struct ib_sge sge[RXE_MAX_SGE]; 198 } srq_wqe; 199 200 /* Responder resources. It's a circular list where the oldest 201 * resource is dropped first. 202 */ 203 struct resp_res *resources; 204 unsigned int res_head; 205 unsigned int res_tail; 206 struct resp_res *res; 207 struct rxe_task task; 208 }; 209 210 struct rxe_qp { 211 struct ib_qp ibqp; 212 struct rxe_pool_elem elem; 213 struct ib_qp_attr attr; 214 unsigned int valid; 215 unsigned int mtu; 216 bool is_user; 217 218 struct rxe_pd *pd; 219 struct rxe_srq *srq; 220 struct rxe_cq *scq; 221 struct rxe_cq *rcq; 222 223 enum ib_sig_type sq_sig_type; 224 225 struct rxe_sq sq; 226 struct rxe_rq rq; 227 228 struct socket *sk; 229 u32 dst_cookie; 230 u16 src_port; 231 232 struct rxe_av pri_av; 233 struct rxe_av alt_av; 234 235 atomic_t mcg_num; 236 237 struct sk_buff_head req_pkts; 238 struct sk_buff_head resp_pkts; 239 240 struct rxe_req_info req; 241 struct rxe_comp_info comp; 242 struct rxe_resp_info resp; 243 244 atomic_t ssn; 245 atomic_t skb_out; 246 int need_req_skb; 247 248 /* Timer for retranmitting packet when ACKs have been lost. RC 249 * only. The requester sets it when it is not already 250 * started. The responder resets it whenever an ack is 251 * received. 252 */ 253 struct timer_list retrans_timer; 254 u64 qp_timeout_jiffies; 255 256 /* Timer for handling RNR NAKS. */ 257 struct timer_list rnr_nak_timer; 258 259 spinlock_t state_lock; /* guard requester and completer */ 260 261 struct execute_work cleanup_work; 262 }; 263 264 enum rxe_mr_state { 265 RXE_MR_STATE_INVALID, 266 RXE_MR_STATE_FREE, 267 RXE_MR_STATE_VALID, 268 }; 269 270 enum rxe_mr_copy_dir { 271 RXE_TO_MR_OBJ, 272 RXE_FROM_MR_OBJ, 273 }; 274 275 enum rxe_mr_lookup_type { 276 RXE_LOOKUP_LOCAL, 277 RXE_LOOKUP_REMOTE, 278 }; 279 280 #define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct rxe_phys_buf)) 281 282 struct rxe_phys_buf { 283 u64 addr; 284 u64 size; 285 }; 286 287 struct rxe_map { 288 struct rxe_phys_buf buf[RXE_BUF_PER_MAP]; 289 }; 290 rkey_is_mw(u32 rkey)291 static inline int rkey_is_mw(u32 rkey) 292 { 293 u32 index = rkey >> 8; 294 295 return (index >= RXE_MIN_MW_INDEX) && (index <= RXE_MAX_MW_INDEX); 296 } 297 298 struct rxe_mr { 299 struct rxe_pool_elem elem; 300 struct ib_mr ibmr; 301 302 struct ib_umem *umem; 303 304 u32 lkey; 305 u32 rkey; 306 enum rxe_mr_state state; 307 enum ib_mr_type type; 308 u32 offset; 309 int access; 310 311 int page_shift; 312 int page_mask; 313 int map_shift; 314 int map_mask; 315 316 u32 num_buf; 317 u32 nbuf; 318 319 u32 max_buf; 320 u32 num_map; 321 322 atomic_t num_mw; 323 324 struct rxe_map **map; 325 }; 326 327 enum rxe_mw_state { 328 RXE_MW_STATE_INVALID = RXE_MR_STATE_INVALID, 329 RXE_MW_STATE_FREE = RXE_MR_STATE_FREE, 330 RXE_MW_STATE_VALID = RXE_MR_STATE_VALID, 331 }; 332 333 struct rxe_mw { 334 struct ib_mw ibmw; 335 struct rxe_pool_elem elem; 336 spinlock_t lock; 337 enum rxe_mw_state state; 338 struct rxe_qp *qp; /* Type 2 only */ 339 struct rxe_mr *mr; 340 u32 rkey; 341 int access; 342 u64 addr; 343 u64 length; 344 }; 345 346 struct rxe_mcg { 347 struct rb_node node; 348 struct kref ref_cnt; 349 struct rxe_dev *rxe; 350 struct list_head qp_list; 351 union ib_gid mgid; 352 atomic_t qp_num; 353 u32 qkey; 354 u16 pkey; 355 }; 356 357 struct rxe_mca { 358 struct list_head qp_list; 359 struct rxe_qp *qp; 360 }; 361 362 struct rxe_port { 363 struct ib_port_attr attr; 364 __be64 port_guid; 365 __be64 subnet_prefix; 366 spinlock_t port_lock; /* guard port */ 367 unsigned int mtu_cap; 368 /* special QPs */ 369 u32 qp_gsi_index; 370 }; 371 372 struct rxe_dev { 373 struct ib_device ib_dev; 374 struct ib_device_attr attr; 375 int max_ucontext; 376 int max_inline_data; 377 struct mutex usdev_lock; 378 379 struct net_device *ndev; 380 381 struct rxe_pool uc_pool; 382 struct rxe_pool pd_pool; 383 struct rxe_pool ah_pool; 384 struct rxe_pool srq_pool; 385 struct rxe_pool qp_pool; 386 struct rxe_pool cq_pool; 387 struct rxe_pool mr_pool; 388 struct rxe_pool mw_pool; 389 390 /* multicast support */ 391 spinlock_t mcg_lock; 392 struct rb_root mcg_tree; 393 atomic_t mcg_num; 394 atomic_t mcg_attach; 395 396 spinlock_t pending_lock; /* guard pending_mmaps */ 397 struct list_head pending_mmaps; 398 399 spinlock_t mmap_offset_lock; /* guard mmap_offset */ 400 u64 mmap_offset; 401 402 atomic64_t stats_counters[RXE_NUM_OF_COUNTERS]; 403 404 struct rxe_port port; 405 struct crypto_shash *tfm; 406 }; 407 rxe_counter_inc(struct rxe_dev * rxe,enum rxe_counters index)408 static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters index) 409 { 410 atomic64_inc(&rxe->stats_counters[index]); 411 } 412 to_rdev(struct ib_device * dev)413 static inline struct rxe_dev *to_rdev(struct ib_device *dev) 414 { 415 return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL; 416 } 417 to_ruc(struct ib_ucontext * uc)418 static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc) 419 { 420 return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL; 421 } 422 to_rpd(struct ib_pd * pd)423 static inline struct rxe_pd *to_rpd(struct ib_pd *pd) 424 { 425 return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL; 426 } 427 to_rah(struct ib_ah * ah)428 static inline struct rxe_ah *to_rah(struct ib_ah *ah) 429 { 430 return ah ? container_of(ah, struct rxe_ah, ibah) : NULL; 431 } 432 to_rsrq(struct ib_srq * srq)433 static inline struct rxe_srq *to_rsrq(struct ib_srq *srq) 434 { 435 return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL; 436 } 437 to_rqp(struct ib_qp * qp)438 static inline struct rxe_qp *to_rqp(struct ib_qp *qp) 439 { 440 return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL; 441 } 442 to_rcq(struct ib_cq * cq)443 static inline struct rxe_cq *to_rcq(struct ib_cq *cq) 444 { 445 return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL; 446 } 447 to_rmr(struct ib_mr * mr)448 static inline struct rxe_mr *to_rmr(struct ib_mr *mr) 449 { 450 return mr ? container_of(mr, struct rxe_mr, ibmr) : NULL; 451 } 452 to_rmw(struct ib_mw * mw)453 static inline struct rxe_mw *to_rmw(struct ib_mw *mw) 454 { 455 return mw ? container_of(mw, struct rxe_mw, ibmw) : NULL; 456 } 457 rxe_ah_pd(struct rxe_ah * ah)458 static inline struct rxe_pd *rxe_ah_pd(struct rxe_ah *ah) 459 { 460 return to_rpd(ah->ibah.pd); 461 } 462 mr_pd(struct rxe_mr * mr)463 static inline struct rxe_pd *mr_pd(struct rxe_mr *mr) 464 { 465 return to_rpd(mr->ibmr.pd); 466 } 467 rxe_mw_pd(struct rxe_mw * mw)468 static inline struct rxe_pd *rxe_mw_pd(struct rxe_mw *mw) 469 { 470 return to_rpd(mw->ibmw.pd); 471 } 472 473 int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name); 474 475 #endif /* RXE_VERBS_H */ 476
