1 /* 2 * Copyright(c) 2015 - 2017 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 struct hfi1_16b_header { 114 u32 lrh[4]; 115 union { 116 struct { 117 struct ib_grh grh; 118 struct ib_other_headers oth; 119 } l; 120 struct ib_other_headers oth; 121 } u; 122 } __packed; 123 124 struct hfi1_opa_header { 125 union { 126 struct ib_header ibh; /* 9B header */ 127 struct hfi1_16b_header opah; /* 16B header */ 128 }; 129 u8 hdr_type; /* 9B or 16B */ 130 } __packed; 131 132 struct hfi1_ahg_info { 133 u32 ahgdesc[2]; 134 u16 tx_flags; 135 u8 ahgcount; 136 u8 ahgidx; 137 }; 138 139 struct hfi1_sdma_header { 140 __le64 pbc; 141 struct hfi1_opa_header hdr; 142 } __packed; 143 144 /* 145 * hfi1 specific data structures that will be hidden from rvt after the queue 146 * pair is made common 147 */ 148 struct hfi1_qp_priv { 149 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */ 150 struct sdma_engine *s_sde; /* current sde */ 151 struct send_context *s_sendcontext; /* current sendcontext */ 152 u8 s_sc; /* SC[0..4] for next packet */ 153 struct iowait s_iowait; 154 struct rvt_qp *owner; 155 u8 hdr_type; /* 9B or 16B */ 156 }; 157 158 /* 159 * This structure is used to hold commonly lookedup and computed values during 160 * the send engine progress. 161 */ 162 struct hfi1_pkt_state { 163 struct hfi1_ibdev *dev; 164 struct hfi1_ibport *ibp; 165 struct hfi1_pportdata *ppd; 166 struct verbs_txreq *s_txreq; 167 unsigned long flags; 168 unsigned long timeout; 169 unsigned long timeout_int; 170 int cpu; 171 u8 opcode; 172 bool in_thread; 173 bool pkts_sent; 174 }; 175 176 #define HFI1_PSN_CREDIT 16 177 178 struct hfi1_opcode_stats { 179 u64 n_packets; /* number of packets */ 180 u64 n_bytes; /* total number of bytes */ 181 }; 182 183 struct hfi1_opcode_stats_perctx { 184 struct hfi1_opcode_stats stats[256]; 185 }; 186 187 static inline void inc_opstats( 188 u32 tlen, 189 struct hfi1_opcode_stats *stats) 190 { 191 #ifdef CONFIG_DEBUG_FS 192 stats->n_bytes += tlen; 193 stats->n_packets++; 194 #endif 195 } 196 197 struct hfi1_ibport { 198 struct rvt_qp __rcu *qp[2]; 199 struct rvt_ibport rvp; 200 201 /* the first 16 entries are sl_to_vl for !OPA */ 202 u8 sl_to_sc[32]; 203 u8 sc_to_sl[32]; 204 }; 205 206 struct hfi1_ibdev { 207 struct rvt_dev_info rdi; /* Must be first */ 208 209 /* QP numbers are shared by all IB ports */ 210 /* protect txwait list */ 211 seqlock_t txwait_lock ____cacheline_aligned_in_smp; 212 struct list_head txwait; /* list for wait verbs_txreq */ 213 struct list_head memwait; /* list for wait kernel memory */ 214 struct kmem_cache *verbs_txreq_cache; 215 u64 n_txwait; 216 u64 n_kmem_wait; 217 218 /* protect iowait lists */ 219 seqlock_t iowait_lock ____cacheline_aligned_in_smp; 220 u64 n_piowait; 221 u64 n_piodrain; 222 struct timer_list mem_timer; 223 224 #ifdef CONFIG_DEBUG_FS 225 /* per HFI debugfs */ 226 struct dentry *hfi1_ibdev_dbg; 227 /* per HFI symlinks to above */ 228 struct dentry *hfi1_ibdev_link; 229 #ifdef CONFIG_FAULT_INJECTION 230 struct fault_opcode *fault_opcode; 231 struct fault_packet *fault_packet; 232 bool fault_suppress_err; 233 #endif 234 #endif 235 }; 236 237 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 238 { 239 struct rvt_dev_info *rdi; 240 241 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 242 return container_of(rdi, struct hfi1_ibdev, rdi); 243 } 244 245 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 246 { 247 struct hfi1_qp_priv *priv; 248 249 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 250 return priv->owner; 251 } 252 253 /* 254 * This must be called with s_lock held. 255 */ 256 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 257 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 258 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 259 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 260 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 261 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 262 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 263 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 264 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 265 u16 *out_mad_pkey_index); 266 267 /* 268 * The PSN_MASK and PSN_SHIFT allow for 269 * 1) comparing two PSNs 270 * 2) returning the PSN with any upper bits masked 271 * 3) returning the difference between to PSNs 272 * 273 * The number of significant bits in the PSN must 274 * necessarily be at least one bit less than 275 * the container holding the PSN. 276 */ 277 #define PSN_MASK 0x7FFFFFFF 278 #define PSN_SHIFT 1 279 #define PSN_MODIFY_MASK 0xFFFFFF 280 281 /* 282 * Compare two PSNs 283 * Returns an integer <, ==, or > than zero. 284 */ 285 static inline int cmp_psn(u32 a, u32 b) 286 { 287 return (((int)a) - ((int)b)) << PSN_SHIFT; 288 } 289 290 /* 291 * Return masked PSN 292 */ 293 static inline u32 mask_psn(u32 a) 294 { 295 return a & PSN_MASK; 296 } 297 298 /* 299 * Return delta between two PSNs 300 */ 301 static inline u32 delta_psn(u32 a, u32 b) 302 { 303 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 304 } 305 306 struct verbs_txreq; 307 void hfi1_put_txreq(struct verbs_txreq *tx); 308 309 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 310 311 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 312 bool release, bool copy_last); 313 314 void hfi1_cnp_rcv(struct hfi1_packet *packet); 315 316 void hfi1_uc_rcv(struct hfi1_packet *packet); 317 318 void hfi1_rc_rcv(struct hfi1_packet *packet); 319 320 void hfi1_rc_hdrerr( 321 struct hfi1_ctxtdata *rcd, 322 struct hfi1_packet *packet, 323 struct rvt_qp *qp); 324 325 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 326 327 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 328 329 void hfi1_ud_rcv(struct hfi1_packet *packet); 330 331 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 332 333 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only); 334 335 void hfi1_migrate_qp(struct rvt_qp *qp); 336 337 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 338 int attr_mask, struct ib_udata *udata); 339 340 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 341 int attr_mask, struct ib_udata *udata); 342 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 343 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 344 345 extern const u32 rc_only_opcode; 346 extern const u32 uc_only_opcode; 347 348 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 349 350 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 351 const struct ib_global_route *grh, u32 hwords, u32 nwords); 352 353 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 354 u32 bth0, u32 bth2, int middle, 355 struct hfi1_pkt_state *ps); 356 357 void _hfi1_do_send(struct work_struct *work); 358 359 void hfi1_do_send_from_rvt(struct rvt_qp *qp); 360 361 void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 362 363 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 364 enum ib_wc_status status); 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 int hfi1_wss_init(void); 391 void hfi1_wss_exit(void); 392 393 /* platform specific: return the lowest level cache (llc) size, in KiB */ 394 static inline int wss_llc_size(void) 395 { 396 /* assume that the boot CPU value is universal for all CPUs */ 397 return boot_cpu_data.x86_cache_size; 398 } 399 400 /* platform specific: cacheless copy */ 401 static inline void cacheless_memcpy(void *dst, void *src, size_t n) 402 { 403 /* 404 * Use the only available X64 cacheless copy. Add a __user cast 405 * to quiet sparse. The src agument is already in the kernel so 406 * there are no security issues. The extra fault recovery machinery 407 * is not invoked. 408 */ 409 __copy_user_nocache(dst, (void __user *)src, n, 0); 410 } 411 412 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr) 413 { 414 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ); 415 } 416 417 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 418 419 extern const u8 hdr_len_by_opcode[]; 420 421 extern const int ib_rvt_state_ops[]; 422 423 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 424 425 extern unsigned int hfi1_max_cqes; 426 427 extern unsigned int hfi1_max_cqs; 428 429 extern unsigned int hfi1_max_qp_wrs; 430 431 extern unsigned int hfi1_max_qps; 432 433 extern unsigned int hfi1_max_sges; 434 435 extern unsigned int hfi1_max_mcast_grps; 436 437 extern unsigned int hfi1_max_mcast_qp_attached; 438 439 extern unsigned int hfi1_max_srqs; 440 441 extern unsigned int hfi1_max_srq_sges; 442 443 extern unsigned int hfi1_max_srq_wrs; 444 445 extern unsigned short piothreshold; 446 447 extern const u32 ib_hfi1_rnr_table[]; 448 449 #endif /* HFI1_VERBS_H */ 450