1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #ifndef RXE_VERBS_H 35 #define RXE_VERBS_H 36 37 #include <linux/interrupt.h> 38 #include <rdma/rdma_user_rxe.h> 39 #include "rxe_pool.h" 40 #include "rxe_task.h" 41 #include "rxe_hw_counters.h" 42 43 static inline int pkey_match(u16 key1, u16 key2) 44 { 45 return (((key1 & 0x7fff) != 0) && 46 ((key1 & 0x7fff) == (key2 & 0x7fff)) && 47 ((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0; 48 } 49 50 /* Return >0 if psn_a > psn_b 51 * 0 if psn_a == psn_b 52 * <0 if psn_a < psn_b 53 */ 54 static inline int psn_compare(u32 psn_a, u32 psn_b) 55 { 56 s32 diff; 57 58 diff = (psn_a - psn_b) << 8; 59 return diff; 60 } 61 62 struct rxe_ucontext { 63 struct rxe_pool_entry pelem; 64 struct ib_ucontext ibuc; 65 }; 66 67 struct rxe_pd { 68 struct rxe_pool_entry pelem; 69 struct ib_pd ibpd; 70 }; 71 72 struct rxe_ah { 73 struct rxe_pool_entry pelem; 74 struct ib_ah ibah; 75 struct rxe_pd *pd; 76 struct rxe_av av; 77 }; 78 79 struct rxe_cqe { 80 union { 81 struct ib_wc ibwc; 82 struct ib_uverbs_wc uibwc; 83 }; 84 }; 85 86 struct rxe_cq { 87 struct rxe_pool_entry pelem; 88 struct ib_cq ibcq; 89 struct rxe_queue *queue; 90 spinlock_t cq_lock; 91 u8 notify; 92 int is_user; 93 struct tasklet_struct comp_task; 94 }; 95 96 enum wqe_state { 97 wqe_state_posted, 98 wqe_state_processing, 99 wqe_state_pending, 100 wqe_state_done, 101 wqe_state_error, 102 }; 103 104 struct rxe_sq { 105 int max_wr; 106 int max_sge; 107 int max_inline; 108 spinlock_t sq_lock; /* guard queue */ 109 struct rxe_queue *queue; 110 }; 111 112 struct rxe_rq { 113 int max_wr; 114 int max_sge; 115 spinlock_t producer_lock; /* guard queue producer */ 116 spinlock_t consumer_lock; /* guard queue consumer */ 117 struct rxe_queue *queue; 118 }; 119 120 struct rxe_srq { 121 struct rxe_pool_entry pelem; 122 struct ib_srq ibsrq; 123 struct rxe_pd *pd; 124 struct rxe_rq rq; 125 u32 srq_num; 126 127 int limit; 128 int error; 129 }; 130 131 enum rxe_qp_state { 132 QP_STATE_RESET, 133 QP_STATE_INIT, 134 QP_STATE_READY, 135 QP_STATE_DRAIN, /* req only */ 136 QP_STATE_DRAINED, /* req only */ 137 QP_STATE_ERROR 138 }; 139 140 extern char *rxe_qp_state_name[]; 141 142 struct rxe_req_info { 143 enum rxe_qp_state state; 144 int wqe_index; 145 u32 psn; 146 int opcode; 147 atomic_t rd_atomic; 148 int wait_fence; 149 int need_rd_atomic; 150 int wait_psn; 151 int need_retry; 152 int noack_pkts; 153 struct rxe_task task; 154 }; 155 156 struct rxe_comp_info { 157 u32 psn; 158 int opcode; 159 int timeout; 160 int timeout_retry; 161 u32 retry_cnt; 162 u32 rnr_retry; 163 struct rxe_task task; 164 }; 165 166 enum rdatm_res_state { 167 rdatm_res_state_next, 168 rdatm_res_state_new, 169 rdatm_res_state_replay, 170 }; 171 172 struct resp_res { 173 int type; 174 u32 first_psn; 175 u32 last_psn; 176 u32 cur_psn; 177 enum rdatm_res_state state; 178 179 union { 180 struct { 181 struct sk_buff *skb; 182 } atomic; 183 struct { 184 struct rxe_mem *mr; 185 u64 va_org; 186 u32 rkey; 187 u32 length; 188 u64 va; 189 u32 resid; 190 } read; 191 }; 192 }; 193 194 struct rxe_resp_info { 195 enum rxe_qp_state state; 196 u32 msn; 197 u32 psn; 198 int opcode; 199 int drop_msg; 200 int goto_error; 201 int sent_psn_nak; 202 enum ib_wc_status status; 203 u8 aeth_syndrome; 204 205 /* Receive only */ 206 struct rxe_recv_wqe *wqe; 207 208 /* RDMA read / atomic only */ 209 u64 va; 210 struct rxe_mem *mr; 211 u32 resid; 212 u32 rkey; 213 u64 atomic_orig; 214 215 /* SRQ only */ 216 struct { 217 struct rxe_recv_wqe wqe; 218 struct ib_sge sge[RXE_MAX_SGE]; 219 } srq_wqe; 220 221 /* Responder resources. It's a circular list where the oldest 222 * resource is dropped first. 223 */ 224 struct resp_res *resources; 225 unsigned int res_head; 226 unsigned int res_tail; 227 struct resp_res *res; 228 struct rxe_task task; 229 }; 230 231 struct rxe_qp { 232 struct rxe_pool_entry pelem; 233 struct ib_qp ibqp; 234 struct ib_qp_attr attr; 235 unsigned int valid; 236 unsigned int mtu; 237 int is_user; 238 239 struct rxe_pd *pd; 240 struct rxe_srq *srq; 241 struct rxe_cq *scq; 242 struct rxe_cq *rcq; 243 244 enum ib_sig_type sq_sig_type; 245 246 struct rxe_sq sq; 247 struct rxe_rq rq; 248 249 struct socket *sk; 250 251 struct rxe_av pri_av; 252 struct rxe_av alt_av; 253 254 /* list of mcast groups qp has joined (for cleanup) */ 255 struct list_head grp_list; 256 spinlock_t grp_lock; /* guard grp_list */ 257 258 struct sk_buff_head req_pkts; 259 struct sk_buff_head resp_pkts; 260 struct sk_buff_head send_pkts; 261 262 struct rxe_req_info req; 263 struct rxe_comp_info comp; 264 struct rxe_resp_info resp; 265 266 atomic_t ssn; 267 atomic_t skb_out; 268 int need_req_skb; 269 270 /* Timer for retranmitting packet when ACKs have been lost. RC 271 * only. The requester sets it when it is not already 272 * started. The responder resets it whenever an ack is 273 * received. 274 */ 275 struct timer_list retrans_timer; 276 u64 qp_timeout_jiffies; 277 278 /* Timer for handling RNR NAKS. */ 279 struct timer_list rnr_nak_timer; 280 281 spinlock_t state_lock; /* guard requester and completer */ 282 }; 283 284 enum rxe_mem_state { 285 RXE_MEM_STATE_ZOMBIE, 286 RXE_MEM_STATE_INVALID, 287 RXE_MEM_STATE_FREE, 288 RXE_MEM_STATE_VALID, 289 }; 290 291 enum rxe_mem_type { 292 RXE_MEM_TYPE_NONE, 293 RXE_MEM_TYPE_DMA, 294 RXE_MEM_TYPE_MR, 295 RXE_MEM_TYPE_FMR, 296 RXE_MEM_TYPE_MW, 297 }; 298 299 #define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct rxe_phys_buf)) 300 301 struct rxe_phys_buf { 302 u64 addr; 303 u64 size; 304 }; 305 306 struct rxe_map { 307 struct rxe_phys_buf buf[RXE_BUF_PER_MAP]; 308 }; 309 310 struct rxe_mem { 311 struct rxe_pool_entry pelem; 312 union { 313 struct ib_mr ibmr; 314 struct ib_mw ibmw; 315 }; 316 317 struct rxe_pd *pd; 318 struct ib_umem *umem; 319 320 u32 lkey; 321 u32 rkey; 322 323 enum rxe_mem_state state; 324 enum rxe_mem_type type; 325 u64 va; 326 u64 iova; 327 size_t length; 328 u32 offset; 329 int access; 330 331 int page_shift; 332 int page_mask; 333 int map_shift; 334 int map_mask; 335 336 u32 num_buf; 337 u32 nbuf; 338 339 u32 max_buf; 340 u32 num_map; 341 342 struct rxe_map **map; 343 }; 344 345 struct rxe_mc_grp { 346 struct rxe_pool_entry pelem; 347 spinlock_t mcg_lock; /* guard group */ 348 struct rxe_dev *rxe; 349 struct list_head qp_list; 350 union ib_gid mgid; 351 int num_qp; 352 u32 qkey; 353 u16 pkey; 354 }; 355 356 struct rxe_mc_elem { 357 struct rxe_pool_entry pelem; 358 struct list_head qp_list; 359 struct list_head grp_list; 360 struct rxe_qp *qp; 361 struct rxe_mc_grp *grp; 362 }; 363 364 struct rxe_port { 365 struct ib_port_attr attr; 366 u16 *pkey_tbl; 367 __be64 port_guid; 368 __be64 subnet_prefix; 369 spinlock_t port_lock; /* guard port */ 370 unsigned int mtu_cap; 371 /* special QPs */ 372 u32 qp_smi_index; 373 u32 qp_gsi_index; 374 }; 375 376 struct rxe_dev { 377 struct ib_device ib_dev; 378 struct ib_device_attr attr; 379 int max_ucontext; 380 int max_inline_data; 381 struct kref ref_cnt; 382 struct mutex usdev_lock; 383 384 struct net_device *ndev; 385 386 int xmit_errors; 387 388 struct rxe_pool uc_pool; 389 struct rxe_pool pd_pool; 390 struct rxe_pool ah_pool; 391 struct rxe_pool srq_pool; 392 struct rxe_pool qp_pool; 393 struct rxe_pool cq_pool; 394 struct rxe_pool mr_pool; 395 struct rxe_pool mw_pool; 396 struct rxe_pool mc_grp_pool; 397 struct rxe_pool mc_elem_pool; 398 399 spinlock_t pending_lock; /* guard pending_mmaps */ 400 struct list_head pending_mmaps; 401 402 spinlock_t mmap_offset_lock; /* guard mmap_offset */ 403 int mmap_offset; 404 405 u64 stats_counters[RXE_NUM_OF_COUNTERS]; 406 407 struct rxe_port port; 408 struct list_head list; 409 struct crypto_shash *tfm; 410 }; 411 412 static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters cnt) 413 { 414 rxe->stats_counters[cnt]++; 415 } 416 417 static inline struct rxe_dev *to_rdev(struct ib_device *dev) 418 { 419 return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL; 420 } 421 422 static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc) 423 { 424 return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL; 425 } 426 427 static inline struct rxe_pd *to_rpd(struct ib_pd *pd) 428 { 429 return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL; 430 } 431 432 static inline struct rxe_ah *to_rah(struct ib_ah *ah) 433 { 434 return ah ? container_of(ah, struct rxe_ah, ibah) : NULL; 435 } 436 437 static inline struct rxe_srq *to_rsrq(struct ib_srq *srq) 438 { 439 return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL; 440 } 441 442 static inline struct rxe_qp *to_rqp(struct ib_qp *qp) 443 { 444 return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL; 445 } 446 447 static inline struct rxe_cq *to_rcq(struct ib_cq *cq) 448 { 449 return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL; 450 } 451 452 static inline struct rxe_mem *to_rmr(struct ib_mr *mr) 453 { 454 return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL; 455 } 456 457 static inline struct rxe_mem *to_rmw(struct ib_mw *mw) 458 { 459 return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL; 460 } 461 462 int rxe_register_device(struct rxe_dev *rxe); 463 int rxe_unregister_device(struct rxe_dev *rxe); 464 465 void rxe_mc_cleanup(struct rxe_pool_entry *arg); 466 467 #endif /* RXE_VERBS_H */ 468