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 list_head tid_wait; /* for queueing tid space */ 167 struct hfi1_opfn_data opfn; 168 struct tid_flow_state flow_state; 169 struct tid_rdma_qp_params tid_rdma; 170 struct rvt_qp *owner; 171 u8 hdr_type; /* 9B or 16B */ 172 unsigned long tid_timer_timeout_jiffies; 173 174 /* For TID RDMA READ */ 175 u32 tid_r_reqs; /* Num of tid reads requested */ 176 u32 tid_r_comp; /* Num of tid reads completed */ 177 u32 pending_tid_r_segs; /* Num of pending tid read segments */ 178 u16 pkts_ps; /* packets per segment */ 179 u8 timeout_shift; /* account for number of packets per segment */ 180 }; 181 182 struct hfi1_swqe_priv { 183 struct tid_rdma_request tid_req; 184 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */ 185 }; 186 187 struct hfi1_ack_priv { 188 struct tid_rdma_request tid_req; 189 }; 190 191 /* 192 * This structure is used to hold commonly lookedup and computed values during 193 * the send engine progress. 194 */ 195 struct iowait_work; 196 struct hfi1_pkt_state { 197 struct hfi1_ibdev *dev; 198 struct hfi1_ibport *ibp; 199 struct hfi1_pportdata *ppd; 200 struct verbs_txreq *s_txreq; 201 struct iowait_work *wait; 202 unsigned long flags; 203 unsigned long timeout; 204 unsigned long timeout_int; 205 int cpu; 206 u8 opcode; 207 bool in_thread; 208 bool pkts_sent; 209 }; 210 211 #define HFI1_PSN_CREDIT 16 212 213 struct hfi1_opcode_stats { 214 u64 n_packets; /* number of packets */ 215 u64 n_bytes; /* total number of bytes */ 216 }; 217 218 struct hfi1_opcode_stats_perctx { 219 struct hfi1_opcode_stats stats[256]; 220 }; 221 222 static inline void inc_opstats( 223 u32 tlen, 224 struct hfi1_opcode_stats *stats) 225 { 226 #ifdef CONFIG_DEBUG_FS 227 stats->n_bytes += tlen; 228 stats->n_packets++; 229 #endif 230 } 231 232 struct hfi1_ibport { 233 struct rvt_qp __rcu *qp[2]; 234 struct rvt_ibport rvp; 235 236 /* the first 16 entries are sl_to_vl for !OPA */ 237 u8 sl_to_sc[32]; 238 u8 sc_to_sl[32]; 239 }; 240 241 struct hfi1_ibdev { 242 struct rvt_dev_info rdi; /* Must be first */ 243 244 /* QP numbers are shared by all IB ports */ 245 /* protect txwait list */ 246 seqlock_t txwait_lock ____cacheline_aligned_in_smp; 247 struct list_head txwait; /* list for wait verbs_txreq */ 248 struct list_head memwait; /* list for wait kernel memory */ 249 struct kmem_cache *verbs_txreq_cache; 250 u64 n_txwait; 251 u64 n_kmem_wait; 252 u64 n_tidwait; 253 254 /* protect iowait lists */ 255 seqlock_t iowait_lock ____cacheline_aligned_in_smp; 256 u64 n_piowait; 257 u64 n_piodrain; 258 struct timer_list mem_timer; 259 260 #ifdef CONFIG_DEBUG_FS 261 /* per HFI debugfs */ 262 struct dentry *hfi1_ibdev_dbg; 263 /* per HFI symlinks to above */ 264 struct dentry *hfi1_ibdev_link; 265 #ifdef CONFIG_FAULT_INJECTION 266 struct fault *fault; 267 #endif 268 #endif 269 }; 270 271 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 272 { 273 struct rvt_dev_info *rdi; 274 275 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 276 return container_of(rdi, struct hfi1_ibdev, rdi); 277 } 278 279 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 280 { 281 struct hfi1_qp_priv *priv; 282 283 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 284 return priv->owner; 285 } 286 287 /* 288 * This must be called with s_lock held. 289 */ 290 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 291 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 292 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 293 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 294 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 295 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 296 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 297 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 298 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 299 u16 *out_mad_pkey_index); 300 301 /* 302 * The PSN_MASK and PSN_SHIFT allow for 303 * 1) comparing two PSNs 304 * 2) returning the PSN with any upper bits masked 305 * 3) returning the difference between to PSNs 306 * 307 * The number of significant bits in the PSN must 308 * necessarily be at least one bit less than 309 * the container holding the PSN. 310 */ 311 #define PSN_MASK 0x7FFFFFFF 312 #define PSN_SHIFT 1 313 #define PSN_MODIFY_MASK 0xFFFFFF 314 315 /* 316 * Compare two PSNs 317 * Returns an integer <, ==, or > than zero. 318 */ 319 static inline int cmp_psn(u32 a, u32 b) 320 { 321 return (((int)a) - ((int)b)) << PSN_SHIFT; 322 } 323 324 /* 325 * Return masked PSN 326 */ 327 static inline u32 mask_psn(u32 a) 328 { 329 return a & PSN_MASK; 330 } 331 332 /* 333 * Return delta between two PSNs 334 */ 335 static inline u32 delta_psn(u32 a, u32 b) 336 { 337 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 338 } 339 340 static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe) 341 { 342 return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req; 343 } 344 345 static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e) 346 { 347 return &((struct hfi1_ack_priv *)e->priv)->tid_req; 348 } 349 350 /* 351 * Look through all the active flows for a TID RDMA request and find 352 * the one (if it exists) that contains the specified PSN. 353 */ 354 static inline u32 __full_flow_psn(struct flow_state *state, u32 psn) 355 { 356 return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) | 357 (psn & HFI1_KDETH_BTH_SEQ_MASK)); 358 } 359 360 static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn) 361 { 362 return __full_flow_psn(&flow->flow_state, psn); 363 } 364 365 struct verbs_txreq; 366 void hfi1_put_txreq(struct verbs_txreq *tx); 367 368 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 369 370 void hfi1_cnp_rcv(struct hfi1_packet *packet); 371 372 void hfi1_uc_rcv(struct hfi1_packet *packet); 373 374 void hfi1_rc_rcv(struct hfi1_packet *packet); 375 376 void hfi1_rc_hdrerr( 377 struct hfi1_ctxtdata *rcd, 378 struct hfi1_packet *packet, 379 struct rvt_qp *qp); 380 381 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 382 383 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 384 385 void hfi1_ud_rcv(struct hfi1_packet *packet); 386 387 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 388 389 void hfi1_migrate_qp(struct rvt_qp *qp); 390 391 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 392 int attr_mask, struct ib_udata *udata); 393 394 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 395 int attr_mask, struct ib_udata *udata); 396 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 397 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, 398 bool *call_send); 399 400 extern const u32 rc_only_opcode; 401 extern const u32 uc_only_opcode; 402 403 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 404 405 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 406 const struct ib_global_route *grh, u32 hwords, u32 nwords); 407 408 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 409 u32 bth0, u32 bth1, u32 bth2, int middle, 410 struct hfi1_pkt_state *ps); 411 412 void _hfi1_do_send(struct work_struct *work); 413 414 void hfi1_do_send_from_rvt(struct rvt_qp *qp); 415 416 void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 417 418 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn); 419 420 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 421 422 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 423 424 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 425 426 int hfi1_register_ib_device(struct hfi1_devdata *); 427 428 void hfi1_unregister_ib_device(struct hfi1_devdata *); 429 430 void hfi1_ib_rcv(struct hfi1_packet *packet); 431 432 void hfi1_16B_rcv(struct hfi1_packet *packet); 433 434 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 435 436 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 437 u64 pbc); 438 439 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 440 u64 pbc); 441 442 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr) 443 { 444 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ); 445 } 446 447 void hfi1_wait_kmem(struct rvt_qp *qp); 448 449 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp, 450 struct rvt_swqe *wqe, 451 enum ib_wc_status status) 452 { 453 trdma_clean_swqe(qp, wqe); 454 rvt_send_complete(qp, wqe, status); 455 } 456 457 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 458 459 extern const u8 hdr_len_by_opcode[]; 460 461 extern const int ib_rvt_state_ops[]; 462 463 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 464 465 extern unsigned int hfi1_max_cqes; 466 467 extern unsigned int hfi1_max_cqs; 468 469 extern unsigned int hfi1_max_qp_wrs; 470 471 extern unsigned int hfi1_max_qps; 472 473 extern unsigned int hfi1_max_sges; 474 475 extern unsigned int hfi1_max_mcast_grps; 476 477 extern unsigned int hfi1_max_mcast_qp_attached; 478 479 extern unsigned int hfi1_max_srqs; 480 481 extern unsigned int hfi1_max_srq_sges; 482 483 extern unsigned int hfi1_max_srq_wrs; 484 485 extern unsigned short piothreshold; 486 487 extern const u32 ib_hfi1_rnr_table[]; 488 489 #endif /* HFI1_VERBS_H */ 490