drivers/infiniband/hw/hfi1/verbs.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
   2 /*
   3  * Copyright(c) 2015 - 2018 Intel Corporation.
   4  */
   5
   6 #ifndef HFI1_VERBS_H
   7 #define HFI1_VERBS_H
   8
   9 #include <linux/types.h>
  10 #include <linux/seqlock.h>
  11 #include <linux/kernel.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/kref.h>
  14 #include <linux/workqueue.h>
  15 #include <linux/kthread.h>
  16 #include <linux/completion.h>
  17 #include <linux/slab.h>
  18 #include <rdma/ib_pack.h>
  19 #include <rdma/ib_user_verbs.h>
  20 #include <rdma/ib_mad.h>
  21 #include <rdma/ib_hdrs.h>
  22 #include <rdma/rdma_vt.h>
  23 #include <rdma/rdmavt_qp.h>
  24 #include <rdma/rdmavt_cq.h>
  25
  26 struct hfi1_ctxtdata;
  27 struct hfi1_pportdata;
  28 struct hfi1_devdata;
  29 struct hfi1_packet;
  30
  31 #include "iowait.h"
  32 #include "tid_rdma.h"
  33 #include "opfn.h"
  34
  35 #define HFI1_MAX_RDMA_ATOMIC     16
  36
  37 /*
  38  * Increment this value if any changes that break userspace ABI
  39  * compatibility are made.
  40  */
  41 #define HFI1_UVERBS_ABI_VERSION       2
  42
  43 /* IB Performance Manager status values */
  44 #define IB_PMA_SAMPLE_STATUS_DONE       0x00
  45 #define IB_PMA_SAMPLE_STATUS_STARTED    0x01
  46 #define IB_PMA_SAMPLE_STATUS_RUNNING    0x02
  47
  48 /* Mandatory IB performance counter select values. */
  49 #define IB_PMA_PORT_XMIT_DATA   cpu_to_be16(0x0001)
  50 #define IB_PMA_PORT_RCV_DATA    cpu_to_be16(0x0002)
  51 #define IB_PMA_PORT_XMIT_PKTS   cpu_to_be16(0x0003)
  52 #define IB_PMA_PORT_RCV_PKTS    cpu_to_be16(0x0004)
  53 #define IB_PMA_PORT_XMIT_WAIT   cpu_to_be16(0x0005)
  54
  55 #define HFI1_VENDOR_IPG         cpu_to_be16(0xFFA0)
  56
  57 #define IB_DEFAULT_GID_PREFIX   cpu_to_be64(0xfe80000000000000ULL)
  58 #define OPA_BTH_MIG_REQ         BIT(31)
  59
  60 #define RC_OP(x) IB_OPCODE_RC_##x
  61 #define UC_OP(x) IB_OPCODE_UC_##x
  62
  63 /* flags passed by hfi1_ib_rcv() */
  64 enum {
  65         HFI1_HAS_GRH = (1 << 0),
  66 };
  67
  68 #define LRH_16B_BYTES (sizeof_field(struct hfi1_16b_header, lrh))
  69 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
  70 #define LRH_9B_BYTES (sizeof_field(struct ib_header, lrh))
  71 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
  72
  73 /* 24Bits for qpn, upper 8Bits reserved */
  74 struct opa_16b_mgmt {
  75         __be32 dest_qpn;
  76         __be32 src_qpn;
  77 };
  78
  79 struct hfi1_16b_header {
  80         u32 lrh[4];
  81         union {
  82                 struct {
  83                         struct ib_grh grh;
  84                         struct ib_other_headers oth;
  85                 } l;
  86                 struct ib_other_headers oth;
  87                 struct opa_16b_mgmt mgmt;
  88         } u;
  89 } __packed;
  90
  91 struct hfi1_opa_header {
  92         union {
  93                 struct ib_header ibh; /* 9B header */
  94                 struct hfi1_16b_header opah; /* 16B header */
  95         };
  96         u8 hdr_type; /* 9B or 16B */
  97 } __packed;
  98
  99 struct hfi1_ahg_info {
 100         u32 ahgdesc[2];
 101         u16 tx_flags;
 102         u8 ahgcount;
 103         u8 ahgidx;
 104 };
 105
 106 struct hfi1_sdma_header {
 107         __le64 pbc;
 108         struct hfi1_opa_header hdr;
 109 } __packed;
 110
 111 /*
 112  * hfi1 specific data structures that will be hidden from rvt after the queue
 113  * pair is made common
 114  */
 115 struct hfi1_qp_priv {
 116         struct hfi1_ahg_info *s_ahg;              /* ahg info for next header */
 117         struct sdma_engine *s_sde;                /* current sde */
 118         struct send_context *s_sendcontext;       /* current sendcontext */
 119         struct hfi1_ctxtdata *rcd;                /* QP's receive context */
 120         struct page **pages;                      /* for TID page scan */
 121         u32 tid_enqueue;                          /* saved when tid waited */
 122         u8 s_sc;                                  /* SC[0..4] for next packet */
 123         struct iowait s_iowait;
 124         struct timer_list s_tid_timer;            /* for timing tid wait */
 125         struct timer_list s_tid_retry_timer;      /* for timing tid ack */
 126         struct list_head tid_wait;                /* for queueing tid space */
 127         struct hfi1_opfn_data opfn;
 128         struct tid_flow_state flow_state;
 129         struct tid_rdma_qp_params tid_rdma;
 130         struct rvt_qp *owner;
 131         u16 s_running_pkt_size;
 132         u8 hdr_type; /* 9B or 16B */
 133         struct rvt_sge_state tid_ss;       /* SGE state pointer for 2nd leg */
 134         atomic_t n_requests;               /* # of TID RDMA requests in the */
 135                                            /* queue */
 136         atomic_t n_tid_requests;            /* # of sent TID RDMA requests */
 137         unsigned long tid_timer_timeout_jiffies;
 138         unsigned long tid_retry_timeout_jiffies;
 139
 140         /* variables for the TID RDMA SE state machine */
 141         u8 s_state;
 142         u8 s_retry;
 143         u8 rnr_nak_state;       /* RNR NAK state */
 144         u8 s_nak_state;
 145         u32 s_nak_psn;
 146         u32 s_flags;
 147         u32 s_tid_cur;
 148         u32 s_tid_head;
 149         u32 s_tid_tail;
 150         u32 r_tid_head;     /* Most recently added TID RDMA request */
 151         u32 r_tid_tail;     /* the last completed TID RDMA request */
 152         u32 r_tid_ack;      /* the TID RDMA request to be ACK'ed */
 153         u32 r_tid_alloc;    /* Request for which we are allocating resources */
 154         u32 pending_tid_w_segs; /* Num of pending tid write segments */
 155         u32 pending_tid_w_resp; /* Num of pending tid write responses */
 156         u32 alloc_w_segs;       /* Number of segments for which write */
 157                                /* resources have been allocated for this QP */
 158
 159         /* For TID RDMA READ */
 160         u32 tid_r_reqs;         /* Num of tid reads requested */
 161         u32 tid_r_comp;         /* Num of tid reads completed */
 162         u32 pending_tid_r_segs; /* Num of pending tid read segments */
 163         u16 pkts_ps;            /* packets per segment */
 164         u8 timeout_shift;       /* account for number of packets per segment */
 165
 166         u32 r_next_psn_kdeth;
 167         u32 r_next_psn_kdeth_save;
 168         u32 s_resync_psn;
 169         u8 sync_pt;           /* Set when QP reaches sync point */
 170         u8 resync;
 171 };
 172
 173 #define HFI1_QP_WQE_INVALID   ((u32)-1)
 174
 175 struct hfi1_swqe_priv {
 176         struct tid_rdma_request tid_req;
 177         struct rvt_sge_state ss;  /* Used for TID RDMA READ Request */
 178 };
 179
 180 struct hfi1_ack_priv {
 181         struct rvt_sge_state ss;               /* used for TID WRITE RESP */
 182         struct tid_rdma_request tid_req;
 183 };
 184
 185 /*
 186  * This structure is used to hold commonly lookedup and computed values during
 187  * the send engine progress.
 188  */
 189 struct iowait_work;
 190 struct hfi1_pkt_state {
 191         struct hfi1_ibdev *dev;
 192         struct hfi1_ibport *ibp;
 193         struct hfi1_pportdata *ppd;
 194         struct verbs_txreq *s_txreq;
 195         struct iowait_work *wait;
 196         unsigned long flags;
 197         unsigned long timeout;
 198         unsigned long timeout_int;
 199         int cpu;
 200         u8 opcode;
 201         bool in_thread;
 202         bool pkts_sent;
 203 };
 204
 205 #define HFI1_PSN_CREDIT  16
 206
 207 struct hfi1_opcode_stats {
 208         u64 n_packets;          /* number of packets */
 209         u64 n_bytes;            /* total number of bytes */
 210 };
 211
 212 struct hfi1_opcode_stats_perctx {
 213         struct hfi1_opcode_stats stats[256];
 214 };
 215
 216 static inline void inc_opstats(
 217         u32 tlen,
 218         struct hfi1_opcode_stats *stats)
 219 {
 220 #ifdef CONFIG_DEBUG_FS
 221         stats->n_bytes += tlen;
 222         stats->n_packets++;
 223 #endif
 224 }
 225
 226 struct hfi1_ibport {
 227         struct rvt_qp __rcu *qp[2];
 228         struct rvt_ibport rvp;
 229
 230         /* the first 16 entries are sl_to_vl for !OPA */
 231         u8 sl_to_sc[32];
 232         u8 sc_to_sl[32];
 233 };
 234
 235 struct hfi1_ibdev {
 236         struct rvt_dev_info rdi; /* Must be first */
 237
 238         /* QP numbers are shared by all IB ports */
 239         /* protect txwait list */
 240         seqlock_t txwait_lock ____cacheline_aligned_in_smp;
 241         struct list_head txwait;        /* list for wait verbs_txreq */
 242         struct list_head memwait;       /* list for wait kernel memory */
 243         struct kmem_cache *verbs_txreq_cache;
 244         u64 n_txwait;
 245         u64 n_kmem_wait;
 246         u64 n_tidwait;
 247
 248         /* protect iowait lists */
 249         seqlock_t iowait_lock ____cacheline_aligned_in_smp;
 250         u64 n_piowait;
 251         u64 n_piodrain;
 252         struct timer_list mem_timer;
 253
 254 #ifdef CONFIG_DEBUG_FS
 255         /* per HFI debugfs */
 256         struct dentry *hfi1_ibdev_dbg;
 257         /* per HFI symlinks to above */
 258         struct dentry *hfi1_ibdev_link;
 259 #ifdef CONFIG_FAULT_INJECTION
 260         struct fault *fault;
 261 #endif
 262 #endif
 263 };
 264
 265 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
 266 {
 267         struct rvt_dev_info *rdi;
 268
 269         rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
 270         return container_of(rdi, struct hfi1_ibdev, rdi);
 271 }
 272
 273 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
 274 {
 275         struct hfi1_qp_priv *priv;
 276
 277         priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
 278         return priv->owner;
 279 }
 280
 281 /*
 282  * This must be called with s_lock held.
 283  */
 284 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
 285                    u32 qp1, u32 qp2, u32 lid1, u32 lid2);
 286 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num);
 287 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
 288 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
 289 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u32 port,
 290                      const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 291                      const struct ib_mad *in_mad, struct ib_mad *out_mad,
 292                      size_t *out_mad_size, u16 *out_mad_pkey_index);
 293
 294 /*
 295  * The PSN_MASK and PSN_SHIFT allow for
 296  * 1) comparing two PSNs
 297  * 2) returning the PSN with any upper bits masked
 298  * 3) returning the difference between to PSNs
 299  *
 300  * The number of significant bits in the PSN must
 301  * necessarily be at least one bit less than
 302  * the container holding the PSN.
 303  */
 304 #define PSN_MASK 0x7FFFFFFF
 305 #define PSN_SHIFT 1
 306 #define PSN_MODIFY_MASK 0xFFFFFF
 307
 308 /*
 309  * Compare two PSNs
 310  * Returns an integer <, ==, or > than zero.
 311  */
 312 static inline int cmp_psn(u32 a, u32 b)
 313 {
 314         return (((int)a) - ((int)b)) << PSN_SHIFT;
 315 }
 316
 317 /*
 318  * Return masked PSN
 319  */
 320 static inline u32 mask_psn(u32 a)
 321 {
 322         return a & PSN_MASK;
 323 }
 324
 325 /*
 326  * Return delta between two PSNs
 327  */
 328 static inline u32 delta_psn(u32 a, u32 b)
 329 {
 330         return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
 331 }
 332
 333 static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
 334 {
 335         return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
 336 }
 337
 338 static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
 339 {
 340         return &((struct hfi1_ack_priv *)e->priv)->tid_req;
 341 }
 342
 343 /*
 344  * Look through all the active flows for a TID RDMA request and find
 345  * the one (if it exists) that contains the specified PSN.
 346  */
 347 static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
 348 {
 349         return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
 350                         (psn & HFI1_KDETH_BTH_SEQ_MASK));
 351 }
 352
 353 static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
 354 {
 355         return __full_flow_psn(&flow->flow_state, psn);
 356 }
 357
 358 struct verbs_txreq;
 359 void hfi1_put_txreq(struct verbs_txreq *tx);
 360
 361 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 362
 363 void hfi1_cnp_rcv(struct hfi1_packet *packet);
 364
 365 void hfi1_uc_rcv(struct hfi1_packet *packet);
 366
 367 void hfi1_rc_rcv(struct hfi1_packet *packet);
 368
 369 void hfi1_rc_hdrerr(
 370         struct hfi1_ctxtdata *rcd,
 371         struct hfi1_packet *packet,
 372         struct rvt_qp *qp);
 373
 374 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
 375
 376 void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);
 377 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
 378
 379 void hfi1_ud_rcv(struct hfi1_packet *packet);
 380
 381 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
 382
 383 void hfi1_migrate_qp(struct rvt_qp *qp);
 384
 385 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
 386                          int attr_mask, struct ib_udata *udata);
 387
 388 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
 389                     int attr_mask, struct ib_udata *udata);
 390 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
 391 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
 392                    bool *call_send);
 393
 394 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
 395
 396 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
 397                   const struct ib_global_route *grh, u32 hwords, u32 nwords);
 398
 399 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 400                           u32 bth0, u32 bth1, u32 bth2, int middle,
 401                           struct hfi1_pkt_state *ps);
 402
 403 bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 404                               bool tid);
 405
 406 void _hfi1_do_send(struct work_struct *work);
 407
 408 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
 409
 410 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
 411
 412 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
 413
 414 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 415
 416 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 417
 418 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
 419
 420 int hfi1_register_ib_device(struct hfi1_devdata *);
 421
 422 void hfi1_unregister_ib_device(struct hfi1_devdata *);
 423
 424 void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
 425
 426 void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
 427
 428 void hfi1_ib_rcv(struct hfi1_packet *packet);
 429
 430 void hfi1_16B_rcv(struct hfi1_packet *packet);
 431
 432 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
 433
 434 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 435                         u64 pbc);
 436
 437 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 438                         u64 pbc);
 439
 440 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
 441 {
 442         return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
 443 }
 444
 445 void hfi1_wait_kmem(struct rvt_qp *qp);
 446
 447 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
 448                                             struct rvt_swqe *wqe,
 449                                             enum ib_wc_status status)
 450 {
 451         trdma_clean_swqe(qp, wqe);
 452         rvt_send_complete(qp, wqe, status);
 453 }
 454
 455 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
 456
 457 extern const u8 hdr_len_by_opcode[];
 458
 459 extern const int ib_rvt_state_ops[];
 460
 461 extern __be64 ib_hfi1_sys_image_guid;    /* in network order */
 462
 463 extern unsigned int hfi1_max_cqes;
 464
 465 extern unsigned int hfi1_max_cqs;
 466
 467 extern unsigned int hfi1_max_qp_wrs;
 468
 469 extern unsigned int hfi1_max_qps;
 470
 471 extern unsigned int hfi1_max_sges;
 472
 473 extern unsigned int hfi1_max_mcast_grps;
 474
 475 extern unsigned int hfi1_max_mcast_qp_attached;
 476
 477 extern unsigned int hfi1_max_srqs;
 478
 479 extern unsigned int hfi1_max_srq_sges;
 480
 481 extern unsigned int hfi1_max_srq_wrs;
 482
 483 extern unsigned short piothreshold;
 484
 485 extern const u32 ib_hfi1_rnr_table[];
 486
 487 #endif                          /* HFI1_VERBS_H */