drivers/infiniband/hw/hfi1/verbs.h

   1 /*
   2  * Copyright(c) 2015 - 2018 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47
  48 #ifndef HFI1_VERBS_H
  49 #define HFI1_VERBS_H
  50
  51 #include <linux/types.h>
  52 #include <linux/seqlock.h>
  53 #include <linux/kernel.h>
  54 #include <linux/interrupt.h>
  55 #include <linux/kref.h>
  56 #include <linux/workqueue.h>
  57 #include <linux/kthread.h>
  58 #include <linux/completion.h>
  59 #include <linux/slab.h>
  60 #include <rdma/ib_pack.h>
  61 #include <rdma/ib_user_verbs.h>
  62 #include <rdma/ib_mad.h>
  63 #include <rdma/ib_hdrs.h>
  64 #include <rdma/rdma_vt.h>
  65 #include <rdma/rdmavt_qp.h>
  66 #include <rdma/rdmavt_cq.h>
  67
  68 struct hfi1_ctxtdata;
  69 struct hfi1_pportdata;
  70 struct hfi1_devdata;
  71 struct hfi1_packet;
  72
  73 #include "iowait.h"
  74 #include "tid_rdma.h"
  75 #include "opfn.h"
  76
  77 #define HFI1_MAX_RDMA_ATOMIC     16
  78
  79 /*
  80  * Increment this value if any changes that break userspace ABI
  81  * compatibility are made.
  82  */
  83 #define HFI1_UVERBS_ABI_VERSION       2
  84
  85 /* IB Performance Manager status values */
  86 #define IB_PMA_SAMPLE_STATUS_DONE       0x00
  87 #define IB_PMA_SAMPLE_STATUS_STARTED    0x01
  88 #define IB_PMA_SAMPLE_STATUS_RUNNING    0x02
  89
  90 /* Mandatory IB performance counter select values. */
  91 #define IB_PMA_PORT_XMIT_DATA   cpu_to_be16(0x0001)
  92 #define IB_PMA_PORT_RCV_DATA    cpu_to_be16(0x0002)
  93 #define IB_PMA_PORT_XMIT_PKTS   cpu_to_be16(0x0003)
  94 #define IB_PMA_PORT_RCV_PKTS    cpu_to_be16(0x0004)
  95 #define IB_PMA_PORT_XMIT_WAIT   cpu_to_be16(0x0005)
  96
  97 #define HFI1_VENDOR_IPG         cpu_to_be16(0xFFA0)
  98
  99 #define IB_DEFAULT_GID_PREFIX   cpu_to_be64(0xfe80000000000000ULL)
 100 #define OPA_BTH_MIG_REQ         BIT(31)
 101
 102 #define RC_OP(x) IB_OPCODE_RC_##x
 103 #define UC_OP(x) IB_OPCODE_UC_##x
 104
 105 /* flags passed by hfi1_ib_rcv() */
 106 enum {
 107         HFI1_HAS_GRH = (1 << 0),
 108 };
 109
 110 #define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
 111 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
 112 #define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
 113 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
 114
 115 /* 24Bits for qpn, upper 8Bits reserved */
 116 struct opa_16b_mgmt {
 117         __be32 dest_qpn;
 118         __be32 src_qpn;
 119 };
 120
 121 struct hfi1_16b_header {
 122         u32 lrh[4];
 123         union {
 124                 struct {
 125                         struct ib_grh grh;
 126                         struct ib_other_headers oth;
 127                 } l;
 128                 struct ib_other_headers oth;
 129                 struct opa_16b_mgmt mgmt;
 130         } u;
 131 } __packed;
 132
 133 struct hfi1_opa_header {
 134         union {
 135                 struct ib_header ibh; /* 9B header */
 136                 struct hfi1_16b_header opah; /* 16B header */
 137         };
 138         u8 hdr_type; /* 9B or 16B */
 139 } __packed;
 140
 141 struct hfi1_ahg_info {
 142         u32 ahgdesc[2];
 143         u16 tx_flags;
 144         u8 ahgcount;
 145         u8 ahgidx;
 146 };
 147
 148 struct hfi1_sdma_header {
 149         __le64 pbc;
 150         struct hfi1_opa_header hdr;
 151 } __packed;
 152
 153 /*
 154  * hfi1 specific data structures that will be hidden from rvt after the queue
 155  * pair is made common
 156  */
 157 struct hfi1_qp_priv {
 158         struct hfi1_ahg_info *s_ahg;              /* ahg info for next header */
 159         struct sdma_engine *s_sde;                /* current sde */
 160         struct send_context *s_sendcontext;       /* current sendcontext */
 161         struct hfi1_ctxtdata *rcd;                /* QP's receive context */
 162         struct page **pages;                      /* for TID page scan */
 163         u32 tid_enqueue;                          /* saved when tid waited */
 164         u8 s_sc;                                  /* SC[0..4] for next packet */
 165         struct iowait s_iowait;
 166         struct timer_list s_tid_timer;            /* for timing tid wait */
 167         struct timer_list s_tid_retry_timer;      /* for timing tid ack */
 168         struct list_head tid_wait;                /* for queueing tid space */
 169         struct hfi1_opfn_data opfn;
 170         struct tid_flow_state flow_state;
 171         struct tid_rdma_qp_params tid_rdma;
 172         struct rvt_qp *owner;
 173         u8 hdr_type; /* 9B or 16B */
 174         struct rvt_sge_state tid_ss;       /* SGE state pointer for 2nd leg */
 175         atomic_t n_requests;               /* # of TID RDMA requests in the */
 176                                            /* queue */
 177         atomic_t n_tid_requests;            /* # of sent TID RDMA requests */
 178         unsigned long tid_timer_timeout_jiffies;
 179         unsigned long tid_retry_timeout_jiffies;
 180
 181         /* variables for the TID RDMA SE state machine */
 182         u8 s_state;
 183         u8 s_retry;
 184         u8 rnr_nak_state;       /* RNR NAK state */
 185         u8 s_nak_state;
 186         u32 s_nak_psn;
 187         u32 s_flags;
 188         u32 s_tid_cur;
 189         u32 s_tid_head;
 190         u32 s_tid_tail;
 191         u32 r_tid_head;     /* Most recently added TID RDMA request */
 192         u32 r_tid_tail;     /* the last completed TID RDMA request */
 193         u32 r_tid_ack;      /* the TID RDMA request to be ACK'ed */
 194         u32 r_tid_alloc;    /* Request for which we are allocating resources */
 195         u32 pending_tid_w_segs; /* Num of pending tid write segments */
 196         u32 pending_tid_w_resp; /* Num of pending tid write responses */
 197         u32 alloc_w_segs;       /* Number of segments for which write */
 198                                /* resources have been allocated for this QP */
 199
 200         /* For TID RDMA READ */
 201         u32 tid_r_reqs;         /* Num of tid reads requested */
 202         u32 tid_r_comp;         /* Num of tid reads completed */
 203         u32 pending_tid_r_segs; /* Num of pending tid read segments */
 204         u16 pkts_ps;            /* packets per segment */
 205         u8 timeout_shift;       /* account for number of packets per segment */
 206
 207         u32 r_next_psn_kdeth;
 208         u32 r_next_psn_kdeth_save;
 209         u32 s_resync_psn;
 210         u8 sync_pt;           /* Set when QP reaches sync point */
 211         u8 resync;
 212 };
 213
 214 #define HFI1_QP_WQE_INVALID   ((u32)-1)
 215
 216 struct hfi1_swqe_priv {
 217         struct tid_rdma_request tid_req;
 218         struct rvt_sge_state ss;  /* Used for TID RDMA READ Request */
 219 };
 220
 221 struct hfi1_ack_priv {
 222         struct rvt_sge_state ss;               /* used for TID WRITE RESP */
 223         struct tid_rdma_request tid_req;
 224 };
 225
 226 /*
 227  * This structure is used to hold commonly lookedup and computed values during
 228  * the send engine progress.
 229  */
 230 struct iowait_work;
 231 struct hfi1_pkt_state {
 232         struct hfi1_ibdev *dev;
 233         struct hfi1_ibport *ibp;
 234         struct hfi1_pportdata *ppd;
 235         struct verbs_txreq *s_txreq;
 236         struct iowait_work *wait;
 237         unsigned long flags;
 238         unsigned long timeout;
 239         unsigned long timeout_int;
 240         int cpu;
 241         u8 opcode;
 242         bool in_thread;
 243         bool pkts_sent;
 244 };
 245
 246 #define HFI1_PSN_CREDIT  16
 247
 248 struct hfi1_opcode_stats {
 249         u64 n_packets;          /* number of packets */
 250         u64 n_bytes;            /* total number of bytes */
 251 };
 252
 253 struct hfi1_opcode_stats_perctx {
 254         struct hfi1_opcode_stats stats[256];
 255 };
 256
 257 static inline void inc_opstats(
 258         u32 tlen,
 259         struct hfi1_opcode_stats *stats)
 260 {
 261 #ifdef CONFIG_DEBUG_FS
 262         stats->n_bytes += tlen;
 263         stats->n_packets++;
 264 #endif
 265 }
 266
 267 struct hfi1_ibport {
 268         struct rvt_qp __rcu *qp[2];
 269         struct rvt_ibport rvp;
 270
 271         /* the first 16 entries are sl_to_vl for !OPA */
 272         u8 sl_to_sc[32];
 273         u8 sc_to_sl[32];
 274 };
 275
 276 struct hfi1_ibdev {
 277         struct rvt_dev_info rdi; /* Must be first */
 278
 279         /* QP numbers are shared by all IB ports */
 280         /* protect txwait list */
 281         seqlock_t txwait_lock ____cacheline_aligned_in_smp;
 282         struct list_head txwait;        /* list for wait verbs_txreq */
 283         struct list_head memwait;       /* list for wait kernel memory */
 284         struct kmem_cache *verbs_txreq_cache;
 285         u64 n_txwait;
 286         u64 n_kmem_wait;
 287         u64 n_tidwait;
 288
 289         /* protect iowait lists */
 290         seqlock_t iowait_lock ____cacheline_aligned_in_smp;
 291         u64 n_piowait;
 292         u64 n_piodrain;
 293         struct timer_list mem_timer;
 294
 295 #ifdef CONFIG_DEBUG_FS
 296         /* per HFI debugfs */
 297         struct dentry *hfi1_ibdev_dbg;
 298         /* per HFI symlinks to above */
 299         struct dentry *hfi1_ibdev_link;
 300 #ifdef CONFIG_FAULT_INJECTION
 301         struct fault *fault;
 302 #endif
 303 #endif
 304 };
 305
 306 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
 307 {
 308         struct rvt_dev_info *rdi;
 309
 310         rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
 311         return container_of(rdi, struct hfi1_ibdev, rdi);
 312 }
 313
 314 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
 315 {
 316         struct hfi1_qp_priv *priv;
 317
 318         priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
 319         return priv->owner;
 320 }
 321
 322 /*
 323  * This must be called with s_lock held.
 324  */
 325 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
 326                    u32 qp1, u32 qp2, u32 lid1, u32 lid2);
 327 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
 328 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
 329 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
 330 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
 331                      const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 332                      const struct ib_mad_hdr *in_mad, size_t in_mad_size,
 333                      struct ib_mad_hdr *out_mad, size_t *out_mad_size,
 334                      u16 *out_mad_pkey_index);
 335
 336 /*
 337  * The PSN_MASK and PSN_SHIFT allow for
 338  * 1) comparing two PSNs
 339  * 2) returning the PSN with any upper bits masked
 340  * 3) returning the difference between to PSNs
 341  *
 342  * The number of significant bits in the PSN must
 343  * necessarily be at least one bit less than
 344  * the container holding the PSN.
 345  */
 346 #define PSN_MASK 0x7FFFFFFF
 347 #define PSN_SHIFT 1
 348 #define PSN_MODIFY_MASK 0xFFFFFF
 349
 350 /*
 351  * Compare two PSNs
 352  * Returns an integer <, ==, or > than zero.
 353  */
 354 static inline int cmp_psn(u32 a, u32 b)
 355 {
 356         return (((int)a) - ((int)b)) << PSN_SHIFT;
 357 }
 358
 359 /*
 360  * Return masked PSN
 361  */
 362 static inline u32 mask_psn(u32 a)
 363 {
 364         return a & PSN_MASK;
 365 }
 366
 367 /*
 368  * Return delta between two PSNs
 369  */
 370 static inline u32 delta_psn(u32 a, u32 b)
 371 {
 372         return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
 373 }
 374
 375 static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
 376 {
 377         return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
 378 }
 379
 380 static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
 381 {
 382         return &((struct hfi1_ack_priv *)e->priv)->tid_req;
 383 }
 384
 385 /*
 386  * Look through all the active flows for a TID RDMA request and find
 387  * the one (if it exists) that contains the specified PSN.
 388  */
 389 static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
 390 {
 391         return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
 392                         (psn & HFI1_KDETH_BTH_SEQ_MASK));
 393 }
 394
 395 static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
 396 {
 397         return __full_flow_psn(&flow->flow_state, psn);
 398 }
 399
 400 struct verbs_txreq;
 401 void hfi1_put_txreq(struct verbs_txreq *tx);
 402
 403 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 404
 405 void hfi1_cnp_rcv(struct hfi1_packet *packet);
 406
 407 void hfi1_uc_rcv(struct hfi1_packet *packet);
 408
 409 void hfi1_rc_rcv(struct hfi1_packet *packet);
 410
 411 void hfi1_rc_hdrerr(
 412         struct hfi1_ctxtdata *rcd,
 413         struct hfi1_packet *packet,
 414         struct rvt_qp *qp);
 415
 416 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
 417
 418 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
 419
 420 void hfi1_ud_rcv(struct hfi1_packet *packet);
 421
 422 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
 423
 424 void hfi1_migrate_qp(struct rvt_qp *qp);
 425
 426 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
 427                          int attr_mask, struct ib_udata *udata);
 428
 429 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
 430                     int attr_mask, struct ib_udata *udata);
 431 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
 432 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
 433                    bool *call_send);
 434
 435 extern const u32 rc_only_opcode;
 436 extern const u32 uc_only_opcode;
 437
 438 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
 439
 440 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
 441                   const struct ib_global_route *grh, u32 hwords, u32 nwords);
 442
 443 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 444                           u32 bth0, u32 bth1, u32 bth2, int middle,
 445                           struct hfi1_pkt_state *ps);
 446
 447 bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 448                               bool tid);
 449
 450 void _hfi1_do_send(struct work_struct *work);
 451
 452 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
 453
 454 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
 455
 456 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
 457
 458 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 459
 460 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 461
 462 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 463
 464 int hfi1_register_ib_device(struct hfi1_devdata *);
 465
 466 void hfi1_unregister_ib_device(struct hfi1_devdata *);
 467
 468 void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
 469
 470 void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
 471
 472 void hfi1_ib_rcv(struct hfi1_packet *packet);
 473
 474 void hfi1_16B_rcv(struct hfi1_packet *packet);
 475
 476 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
 477
 478 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 479                         u64 pbc);
 480
 481 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 482                         u64 pbc);
 483
 484 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
 485 {
 486         return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
 487 }
 488
 489 void hfi1_wait_kmem(struct rvt_qp *qp);
 490
 491 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
 492                                             struct rvt_swqe *wqe,
 493                                             enum ib_wc_status status)
 494 {
 495         trdma_clean_swqe(qp, wqe);
 496         rvt_send_complete(qp, wqe, status);
 497 }
 498
 499 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
 500
 501 extern const u8 hdr_len_by_opcode[];
 502
 503 extern const int ib_rvt_state_ops[];
 504
 505 extern __be64 ib_hfi1_sys_image_guid;    /* in network order */
 506
 507 extern unsigned int hfi1_max_cqes;
 508
 509 extern unsigned int hfi1_max_cqs;
 510
 511 extern unsigned int hfi1_max_qp_wrs;
 512
 513 extern unsigned int hfi1_max_qps;
 514
 515 extern unsigned int hfi1_max_sges;
 516
 517 extern unsigned int hfi1_max_mcast_grps;
 518
 519 extern unsigned int hfi1_max_mcast_qp_attached;
 520
 521 extern unsigned int hfi1_max_srqs;
 522
 523 extern unsigned int hfi1_max_srq_sges;
 524
 525 extern unsigned int hfi1_max_srq_wrs;
 526
 527 extern unsigned short piothreshold;
 528
 529 extern const u32 ib_hfi1_rnr_table[];
 530
 531 #endif                          /* HFI1_VERBS_H */