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 75 #define HFI1_MAX_RDMA_ATOMIC 16 76 77 /* 78 * Increment this value if any changes that break userspace ABI 79 * compatibility are made. 80 */ 81 #define HFI1_UVERBS_ABI_VERSION 2 82 83 /* IB Performance Manager status values */ 84 #define IB_PMA_SAMPLE_STATUS_DONE 0x00 85 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 86 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 87 88 /* Mandatory IB performance counter select values. */ 89 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) 90 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) 91 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) 92 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) 93 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) 94 95 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0) 96 97 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) 98 #define OPA_BTH_MIG_REQ BIT(31) 99 100 #define RC_OP(x) IB_OPCODE_RC_##x 101 #define UC_OP(x) IB_OPCODE_UC_##x 102 103 /* flags passed by hfi1_ib_rcv() */ 104 enum { 105 HFI1_HAS_GRH = (1 << 0), 106 }; 107 108 #define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh)) 109 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32)) 110 #define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh)) 111 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32)) 112 113 /* 24Bits for qpn, upper 8Bits reserved */ 114 struct opa_16b_mgmt { 115 __be32 dest_qpn; 116 __be32 src_qpn; 117 }; 118 119 struct hfi1_16b_header { 120 u32 lrh[4]; 121 union { 122 struct { 123 struct ib_grh grh; 124 struct ib_other_headers oth; 125 } l; 126 struct ib_other_headers oth; 127 struct opa_16b_mgmt mgmt; 128 } u; 129 } __packed; 130 131 struct hfi1_opa_header { 132 union { 133 struct ib_header ibh; /* 9B header */ 134 struct hfi1_16b_header opah; /* 16B header */ 135 }; 136 u8 hdr_type; /* 9B or 16B */ 137 } __packed; 138 139 struct hfi1_ahg_info { 140 u32 ahgdesc[2]; 141 u16 tx_flags; 142 u8 ahgcount; 143 u8 ahgidx; 144 }; 145 146 struct hfi1_sdma_header { 147 __le64 pbc; 148 struct hfi1_opa_header hdr; 149 } __packed; 150 151 /* 152 * hfi1 specific data structures that will be hidden from rvt after the queue 153 * pair is made common 154 */ 155 struct hfi1_qp_priv { 156 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */ 157 struct sdma_engine *s_sde; /* current sde */ 158 struct send_context *s_sendcontext; /* current sendcontext */ 159 u8 s_sc; /* SC[0..4] for next packet */ 160 struct iowait s_iowait; 161 struct rvt_qp *owner; 162 u8 hdr_type; /* 9B or 16B */ 163 }; 164 165 /* 166 * This structure is used to hold commonly lookedup and computed values during 167 * the send engine progress. 168 */ 169 struct iowait_work; 170 struct hfi1_pkt_state { 171 struct hfi1_ibdev *dev; 172 struct hfi1_ibport *ibp; 173 struct hfi1_pportdata *ppd; 174 struct verbs_txreq *s_txreq; 175 struct iowait_work *wait; 176 unsigned long flags; 177 unsigned long timeout; 178 unsigned long timeout_int; 179 int cpu; 180 u8 opcode; 181 bool in_thread; 182 bool pkts_sent; 183 }; 184 185 #define HFI1_PSN_CREDIT 16 186 187 struct hfi1_opcode_stats { 188 u64 n_packets; /* number of packets */ 189 u64 n_bytes; /* total number of bytes */ 190 }; 191 192 struct hfi1_opcode_stats_perctx { 193 struct hfi1_opcode_stats stats[256]; 194 }; 195 196 static inline void inc_opstats( 197 u32 tlen, 198 struct hfi1_opcode_stats *stats) 199 { 200 #ifdef CONFIG_DEBUG_FS 201 stats->n_bytes += tlen; 202 stats->n_packets++; 203 #endif 204 } 205 206 struct hfi1_ibport { 207 struct rvt_qp __rcu *qp[2]; 208 struct rvt_ibport rvp; 209 210 /* the first 16 entries are sl_to_vl for !OPA */ 211 u8 sl_to_sc[32]; 212 u8 sc_to_sl[32]; 213 }; 214 215 struct hfi1_ibdev { 216 struct rvt_dev_info rdi; /* Must be first */ 217 218 /* QP numbers are shared by all IB ports */ 219 /* protect txwait list */ 220 seqlock_t txwait_lock ____cacheline_aligned_in_smp; 221 struct list_head txwait; /* list for wait verbs_txreq */ 222 struct list_head memwait; /* list for wait kernel memory */ 223 struct kmem_cache *verbs_txreq_cache; 224 u64 n_txwait; 225 u64 n_kmem_wait; 226 227 /* protect iowait lists */ 228 seqlock_t iowait_lock ____cacheline_aligned_in_smp; 229 u64 n_piowait; 230 u64 n_piodrain; 231 struct timer_list mem_timer; 232 233 #ifdef CONFIG_DEBUG_FS 234 /* per HFI debugfs */ 235 struct dentry *hfi1_ibdev_dbg; 236 /* per HFI symlinks to above */ 237 struct dentry *hfi1_ibdev_link; 238 #ifdef CONFIG_FAULT_INJECTION 239 struct fault *fault; 240 #endif 241 #endif 242 }; 243 244 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 245 { 246 struct rvt_dev_info *rdi; 247 248 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 249 return container_of(rdi, struct hfi1_ibdev, rdi); 250 } 251 252 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 253 { 254 struct hfi1_qp_priv *priv; 255 256 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 257 return priv->owner; 258 } 259 260 /* 261 * This must be called with s_lock held. 262 */ 263 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 264 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 265 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 266 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 267 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 268 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 269 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 270 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 271 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 272 u16 *out_mad_pkey_index); 273 274 /* 275 * The PSN_MASK and PSN_SHIFT allow for 276 * 1) comparing two PSNs 277 * 2) returning the PSN with any upper bits masked 278 * 3) returning the difference between to PSNs 279 * 280 * The number of significant bits in the PSN must 281 * necessarily be at least one bit less than 282 * the container holding the PSN. 283 */ 284 #define PSN_MASK 0x7FFFFFFF 285 #define PSN_SHIFT 1 286 #define PSN_MODIFY_MASK 0xFFFFFF 287 288 /* 289 * Compare two PSNs 290 * Returns an integer <, ==, or > than zero. 291 */ 292 static inline int cmp_psn(u32 a, u32 b) 293 { 294 return (((int)a) - ((int)b)) << PSN_SHIFT; 295 } 296 297 /* 298 * Return masked PSN 299 */ 300 static inline u32 mask_psn(u32 a) 301 { 302 return a & PSN_MASK; 303 } 304 305 /* 306 * Return delta between two PSNs 307 */ 308 static inline u32 delta_psn(u32 a, u32 b) 309 { 310 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 311 } 312 313 struct verbs_txreq; 314 void hfi1_put_txreq(struct verbs_txreq *tx); 315 316 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 317 318 void hfi1_cnp_rcv(struct hfi1_packet *packet); 319 320 void hfi1_uc_rcv(struct hfi1_packet *packet); 321 322 void hfi1_rc_rcv(struct hfi1_packet *packet); 323 324 void hfi1_rc_hdrerr( 325 struct hfi1_ctxtdata *rcd, 326 struct hfi1_packet *packet, 327 struct rvt_qp *qp); 328 329 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 330 331 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 332 333 void hfi1_ud_rcv(struct hfi1_packet *packet); 334 335 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 336 337 void hfi1_migrate_qp(struct rvt_qp *qp); 338 339 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 340 int attr_mask, struct ib_udata *udata); 341 342 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 343 int attr_mask, struct ib_udata *udata); 344 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 345 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, 346 bool *call_send); 347 348 extern const u32 rc_only_opcode; 349 extern const u32 uc_only_opcode; 350 351 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 352 353 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 354 const struct ib_global_route *grh, u32 hwords, u32 nwords); 355 356 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 357 u32 bth0, u32 bth2, int middle, 358 struct hfi1_pkt_state *ps); 359 360 void _hfi1_do_send(struct work_struct *work); 361 362 void hfi1_do_send_from_rvt(struct rvt_qp *qp); 363 364 void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 365 366 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn); 367 368 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 369 370 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 371 372 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 373 374 int hfi1_register_ib_device(struct hfi1_devdata *); 375 376 void hfi1_unregister_ib_device(struct hfi1_devdata *); 377 378 void hfi1_ib_rcv(struct hfi1_packet *packet); 379 380 void hfi1_16B_rcv(struct hfi1_packet *packet); 381 382 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 383 384 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 385 u64 pbc); 386 387 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 388 u64 pbc); 389 390 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr) 391 { 392 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ); 393 } 394 395 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 396 397 extern const u8 hdr_len_by_opcode[]; 398 399 extern const int ib_rvt_state_ops[]; 400 401 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 402 403 extern unsigned int hfi1_max_cqes; 404 405 extern unsigned int hfi1_max_cqs; 406 407 extern unsigned int hfi1_max_qp_wrs; 408 409 extern unsigned int hfi1_max_qps; 410 411 extern unsigned int hfi1_max_sges; 412 413 extern unsigned int hfi1_max_mcast_grps; 414 415 extern unsigned int hfi1_max_mcast_qp_attached; 416 417 extern unsigned int hfi1_max_srqs; 418 419 extern unsigned int hfi1_max_srq_sges; 420 421 extern unsigned int hfi1_max_srq_wrs; 422 423 extern unsigned short piothreshold; 424 425 extern const u32 ib_hfi1_rnr_table[]; 426 427 #endif /* HFI1_VERBS_H */ 428