drivers/infiniband/sw/rxe/rxe_verbs.h

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