1 /* 2 * Copyright(c) 2015, 2016 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 #define HFI1_GUIDS_PER_PORT 5 77 78 /* 79 * Increment this value if any changes that break userspace ABI 80 * compatibility are made. 81 */ 82 #define HFI1_UVERBS_ABI_VERSION 2 83 84 /* IB Performance Manager status values */ 85 #define IB_PMA_SAMPLE_STATUS_DONE 0x00 86 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 87 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 88 89 /* Mandatory IB performance counter select values. */ 90 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) 91 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) 92 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) 93 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) 94 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) 95 96 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0) 97 98 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) 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 struct hfi1_ahg_info { 109 u32 ahgdesc[2]; 110 u16 tx_flags; 111 u8 ahgcount; 112 u8 ahgidx; 113 }; 114 115 struct hfi1_sdma_header { 116 __le64 pbc; 117 struct ib_header hdr; 118 } __packed; 119 120 /* 121 * hfi1 specific data structures that will be hidden from rvt after the queue 122 * pair is made common 123 */ 124 struct hfi1_qp_priv { 125 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */ 126 struct sdma_engine *s_sde; /* current sde */ 127 struct send_context *s_sendcontext; /* current sendcontext */ 128 u8 s_sc; /* SC[0..4] for next packet */ 129 u8 r_adefered; /* number of acks defered */ 130 struct iowait s_iowait; 131 struct timer_list s_rnr_timer; 132 struct rvt_qp *owner; 133 }; 134 135 /* 136 * This structure is used to hold commonly lookedup and computed values during 137 * the send engine progress. 138 */ 139 struct hfi1_pkt_state { 140 struct hfi1_ibdev *dev; 141 struct hfi1_ibport *ibp; 142 struct hfi1_pportdata *ppd; 143 struct verbs_txreq *s_txreq; 144 unsigned long flags; 145 }; 146 147 #define HFI1_PSN_CREDIT 16 148 149 struct hfi1_opcode_stats { 150 u64 n_packets; /* number of packets */ 151 u64 n_bytes; /* total number of bytes */ 152 }; 153 154 struct hfi1_opcode_stats_perctx { 155 struct hfi1_opcode_stats stats[256]; 156 }; 157 158 static inline void inc_opstats( 159 u32 tlen, 160 struct hfi1_opcode_stats *stats) 161 { 162 #ifdef CONFIG_DEBUG_FS 163 stats->n_bytes += tlen; 164 stats->n_packets++; 165 #endif 166 } 167 168 struct hfi1_ibport { 169 struct rvt_qp __rcu *qp[2]; 170 struct rvt_ibport rvp; 171 172 __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */ 173 174 /* the first 16 entries are sl_to_vl for !OPA */ 175 u8 sl_to_sc[32]; 176 u8 sc_to_sl[32]; 177 }; 178 179 struct hfi1_ibdev { 180 struct rvt_dev_info rdi; /* Must be first */ 181 182 /* QP numbers are shared by all IB ports */ 183 /* protect wait lists */ 184 seqlock_t iowait_lock; 185 struct list_head txwait; /* list for wait verbs_txreq */ 186 struct list_head memwait; /* list for wait kernel memory */ 187 struct list_head txreq_free; 188 struct kmem_cache *verbs_txreq_cache; 189 struct timer_list mem_timer; 190 191 u64 n_piowait; 192 u64 n_piodrain; 193 u64 n_txwait; 194 u64 n_kmem_wait; 195 196 #ifdef CONFIG_DEBUG_FS 197 /* per HFI debugfs */ 198 struct dentry *hfi1_ibdev_dbg; 199 /* per HFI symlinks to above */ 200 struct dentry *hfi1_ibdev_link; 201 #endif 202 }; 203 204 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 205 { 206 struct rvt_dev_info *rdi; 207 208 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 209 return container_of(rdi, struct hfi1_ibdev, rdi); 210 } 211 212 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 213 { 214 struct hfi1_qp_priv *priv; 215 216 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 217 return priv->owner; 218 } 219 220 /* 221 * Send if not busy or waiting for I/O and either 222 * a RC response is pending or we can process send work requests. 223 */ 224 static inline int hfi1_send_ok(struct rvt_qp *qp) 225 { 226 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && 227 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || 228 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 229 } 230 231 /* 232 * This must be called with s_lock held. 233 */ 234 void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl, 235 u32 qp1, u32 qp2, u16 lid1, u16 lid2); 236 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 237 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 238 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 239 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 240 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 241 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 242 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 243 u16 *out_mad_pkey_index); 244 245 /* 246 * The PSN_MASK and PSN_SHIFT allow for 247 * 1) comparing two PSNs 248 * 2) returning the PSN with any upper bits masked 249 * 3) returning the difference between to PSNs 250 * 251 * The number of significant bits in the PSN must 252 * necessarily be at least one bit less than 253 * the container holding the PSN. 254 */ 255 #ifndef CONFIG_HFI1_VERBS_31BIT_PSN 256 #define PSN_MASK 0xFFFFFF 257 #define PSN_SHIFT 8 258 #else 259 #define PSN_MASK 0x7FFFFFFF 260 #define PSN_SHIFT 1 261 #endif 262 #define PSN_MODIFY_MASK 0xFFFFFF 263 264 /* 265 * Compare the lower 24 bits of the msn values. 266 * Returns an integer <, ==, or > than zero. 267 */ 268 static inline int cmp_msn(u32 a, u32 b) 269 { 270 return (((int)a) - ((int)b)) << 8; 271 } 272 273 /* 274 * Compare two PSNs 275 * Returns an integer <, ==, or > than zero. 276 */ 277 static inline int cmp_psn(u32 a, u32 b) 278 { 279 return (((int)a) - ((int)b)) << PSN_SHIFT; 280 } 281 282 /* 283 * Return masked PSN 284 */ 285 static inline u32 mask_psn(u32 a) 286 { 287 return a & PSN_MASK; 288 } 289 290 /* 291 * Return delta between two PSNs 292 */ 293 static inline u32 delta_psn(u32 a, u32 b) 294 { 295 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 296 } 297 298 struct verbs_txreq; 299 void hfi1_put_txreq(struct verbs_txreq *tx); 300 301 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 302 303 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 304 int release, int copy_last); 305 306 void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release); 307 308 void hfi1_cnp_rcv(struct hfi1_packet *packet); 309 310 void hfi1_uc_rcv(struct hfi1_packet *packet); 311 312 void hfi1_rc_rcv(struct hfi1_packet *packet); 313 314 void hfi1_rc_hdrerr( 315 struct hfi1_ctxtdata *rcd, 316 struct ib_header *hdr, 317 u32 rcv_flags, 318 struct rvt_qp *qp); 319 320 u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); 321 322 struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid); 323 324 void hfi1_rc_rnr_retry(unsigned long arg); 325 void hfi1_add_rnr_timer(struct rvt_qp *qp, u32 to); 326 void hfi1_rc_timeout(unsigned long arg); 327 void hfi1_del_timers_sync(struct rvt_qp *qp); 328 void hfi1_stop_rc_timers(struct rvt_qp *qp); 329 330 void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr); 331 332 void hfi1_rc_error(struct rvt_qp *qp, enum ib_wc_status err); 333 334 void hfi1_ud_rcv(struct hfi1_packet *packet); 335 336 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 337 338 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only); 339 340 void hfi1_migrate_qp(struct rvt_qp *qp); 341 342 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 343 int attr_mask, struct ib_udata *udata); 344 345 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 346 int attr_mask, struct ib_udata *udata); 347 348 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 349 350 extern const u32 rc_only_opcode; 351 extern const u32 uc_only_opcode; 352 353 static inline u8 get_opcode(struct ib_header *h) 354 { 355 u16 lnh = be16_to_cpu(h->lrh[0]) & 3; 356 357 if (lnh == IB_LNH_IBA_LOCAL) 358 return be32_to_cpu(h->u.oth.bth[0]) >> 24; 359 else 360 return be32_to_cpu(h->u.l.oth.bth[0]) >> 24; 361 } 362 363 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr, 364 int has_grh, struct rvt_qp *qp, u32 bth0); 365 366 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 367 struct ib_global_route *grh, u32 hwords, u32 nwords); 368 369 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 370 u32 bth0, u32 bth2, int middle, 371 struct hfi1_pkt_state *ps); 372 373 void _hfi1_do_send(struct work_struct *work); 374 375 void hfi1_do_send(struct rvt_qp *qp); 376 377 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 378 enum ib_wc_status status); 379 380 void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn); 381 382 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 383 384 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 385 386 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 387 388 int hfi1_register_ib_device(struct hfi1_devdata *); 389 390 void hfi1_unregister_ib_device(struct hfi1_devdata *); 391 392 void hfi1_ib_rcv(struct hfi1_packet *packet); 393 394 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 395 396 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 397 u64 pbc); 398 399 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 400 u64 pbc); 401 402 int hfi1_wss_init(void); 403 void hfi1_wss_exit(void); 404 405 /* platform specific: return the lowest level cache (llc) size, in KiB */ 406 static inline int wss_llc_size(void) 407 { 408 /* assume that the boot CPU value is universal for all CPUs */ 409 return boot_cpu_data.x86_cache_size; 410 } 411 412 /* platform specific: cacheless copy */ 413 static inline void cacheless_memcpy(void *dst, void *src, size_t n) 414 { 415 /* 416 * Use the only available X64 cacheless copy. Add a __user cast 417 * to quiet sparse. The src agument is already in the kernel so 418 * there are no security issues. The extra fault recovery machinery 419 * is not invoked. 420 */ 421 __copy_user_nocache(dst, (void __user *)src, n, 0); 422 } 423 424 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 425 426 extern const u8 hdr_len_by_opcode[]; 427 428 extern const int ib_rvt_state_ops[]; 429 430 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 431 432 extern unsigned int hfi1_max_cqes; 433 434 extern unsigned int hfi1_max_cqs; 435 436 extern unsigned int hfi1_max_qp_wrs; 437 438 extern unsigned int hfi1_max_qps; 439 440 extern unsigned int hfi1_max_sges; 441 442 extern unsigned int hfi1_max_mcast_grps; 443 444 extern unsigned int hfi1_max_mcast_qp_attached; 445 446 extern unsigned int hfi1_max_srqs; 447 448 extern unsigned int hfi1_max_srq_sges; 449 450 extern unsigned int hfi1_max_srq_wrs; 451 452 extern unsigned short piothreshold; 453 454 extern const u32 ib_hfi1_rnr_table[]; 455 456 #endif /* HFI1_VERBS_H */ 457