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 26struct hfi1_ctxtdata; 27struct hfi1_pportdata; 28struct hfi1_devdata; 29struct 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() */ 64enum { 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 */ 74struct opa_16b_mgmt { 75 __be32 dest_qpn; 76 __be32 src_qpn; 77}; 78 79struct 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 91struct 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 99struct hfi1_ahg_info { 100 u32 ahgdesc[2]; 101 u16 tx_flags; 102 u8 ahgcount; 103 u8 ahgidx; 104}; 105 106struct 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 */ 115struct 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 175struct hfi1_swqe_priv { 176 struct tid_rdma_request tid_req; 177 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */ 178}; 179 180struct 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 */ 189struct iowait_work; 190struct 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 207struct hfi1_opcode_stats { 208 u64 n_packets; /* number of packets */ 209 u64 n_bytes; /* total number of bytes */ 210}; 211 212struct hfi1_opcode_stats_perctx { 213 struct hfi1_opcode_stats stats[256]; 214}; 215 216static 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 226struct 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 235struct 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 265static 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 273static 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 */ 284void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 285 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 286void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num); 287void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 288void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 289int 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 */ 312static 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 */ 320static inline u32 mask_psn(u32 a) 321{ 322 return a & PSN_MASK; 323} 324 325/* 326 * Return delta between two PSNs 327 */ 328static inline u32 delta_psn(u32 a, u32 b) 329{ 330 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 331} 332 333static 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 338static 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 */ 347static 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 353static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn) 354{ 355 return __full_flow_psn(&flow->flow_state, psn); 356} 357 358struct verbs_txreq; 359void hfi1_put_txreq(struct verbs_txreq *tx); 360 361int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 362 363void hfi1_cnp_rcv(struct hfi1_packet *packet); 364 365void hfi1_uc_rcv(struct hfi1_packet *packet); 366 367void hfi1_rc_rcv(struct hfi1_packet *packet); 368 369void hfi1_rc_hdrerr( 370 struct hfi1_ctxtdata *rcd, 371 struct hfi1_packet *packet, 372 struct rvt_qp *qp); 373 374u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 375 376void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah); 377void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 378 379void hfi1_ud_rcv(struct hfi1_packet *packet); 380 381int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 382 383void hfi1_migrate_qp(struct rvt_qp *qp); 384 385int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 386 int attr_mask, struct ib_udata *udata); 387 388void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 389 int attr_mask, struct ib_udata *udata); 390void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 391int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, 392 bool *call_send); 393 394int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 395 396u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 397 const struct ib_global_route *grh, u32 hwords, u32 nwords); 398 399void 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 403bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 404 bool tid); 405 406void _hfi1_do_send(struct work_struct *work); 407 408void hfi1_do_send_from_rvt(struct rvt_qp *qp); 409 410void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 411 412void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn); 413 414int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 415 416int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 417 418int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 419 420int hfi1_register_ib_device(struct hfi1_devdata *); 421 422void hfi1_unregister_ib_device(struct hfi1_devdata *); 423 424void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet); 425 426void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet); 427 428void hfi1_ib_rcv(struct hfi1_packet *packet); 429 430void hfi1_16B_rcv(struct hfi1_packet *packet); 431 432unsigned hfi1_get_npkeys(struct hfi1_devdata *); 433 434int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 435 u64 pbc); 436 437int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 438 u64 pbc); 439 440static 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 445void hfi1_wait_kmem(struct rvt_qp *qp); 446 447static 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 455extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 456 457extern const u8 hdr_len_by_opcode[]; 458 459extern const int ib_rvt_state_ops[]; 460 461extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 462 463extern unsigned int hfi1_max_cqes; 464 465extern unsigned int hfi1_max_cqs; 466 467extern unsigned int hfi1_max_qp_wrs; 468 469extern unsigned int hfi1_max_qps; 470 471extern unsigned int hfi1_max_sges; 472 473extern unsigned int hfi1_max_mcast_grps; 474 475extern unsigned int hfi1_max_mcast_qp_attached; 476 477extern unsigned int hfi1_max_srqs; 478 479extern unsigned int hfi1_max_srq_sges; 480 481extern unsigned int hfi1_max_srq_wrs; 482 483extern unsigned short piothreshold; 484 485extern const u32 ib_hfi1_rnr_table[]; 486 487#endif /* HFI1_VERBS_H */ 488