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 */ 532