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 extern const u32 rc_only_opcode; 395 extern const u32 uc_only_opcode; 396 397 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 398 399 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 400 const struct ib_global_route *grh, u32 hwords, u32 nwords); 401 402 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 403 u32 bth0, u32 bth1, u32 bth2, int middle, 404 struct hfi1_pkt_state *ps); 405 406 bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 407 bool tid); 408 409 void _hfi1_do_send(struct work_struct *work); 410 411 void hfi1_do_send_from_rvt(struct rvt_qp *qp); 412 413 void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 414 415 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn); 416 417 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 418 419 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 420 421 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 422 423 int hfi1_register_ib_device(struct hfi1_devdata *); 424 425 void hfi1_unregister_ib_device(struct hfi1_devdata *); 426 427 void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet); 428 429 void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet); 430 431 void hfi1_ib_rcv(struct hfi1_packet *packet); 432 433 void hfi1_16B_rcv(struct hfi1_packet *packet); 434 435 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 436 437 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 438 u64 pbc); 439 440 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 441 u64 pbc); 442 443 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr) 444 { 445 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ); 446 } 447 448 void hfi1_wait_kmem(struct rvt_qp *qp); 449 450 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp, 451 struct rvt_swqe *wqe, 452 enum ib_wc_status status) 453 { 454 trdma_clean_swqe(qp, wqe); 455 rvt_send_complete(qp, wqe, status); 456 } 457 458 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 459 460 extern const u8 hdr_len_by_opcode[]; 461 462 extern const int ib_rvt_state_ops[]; 463 464 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 465 466 extern unsigned int hfi1_max_cqes; 467 468 extern unsigned int hfi1_max_cqs; 469 470 extern unsigned int hfi1_max_qp_wrs; 471 472 extern unsigned int hfi1_max_qps; 473 474 extern unsigned int hfi1_max_sges; 475 476 extern unsigned int hfi1_max_mcast_grps; 477 478 extern unsigned int hfi1_max_mcast_qp_attached; 479 480 extern unsigned int hfi1_max_srqs; 481 482 extern unsigned int hfi1_max_srq_sges; 483 484 extern unsigned int hfi1_max_srq_wrs; 485 486 extern unsigned short piothreshold; 487 488 extern const u32 ib_hfi1_rnr_table[]; 489 490 #endif /* HFI1_VERBS_H */ 491