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 hfi1_pkt_state { 170 struct hfi1_ibdev *dev; 171 struct hfi1_ibport *ibp; 172 struct hfi1_pportdata *ppd; 173 struct verbs_txreq *s_txreq; 174 unsigned long flags; 175 unsigned long timeout; 176 unsigned long timeout_int; 177 int cpu; 178 u8 opcode; 179 bool in_thread; 180 bool pkts_sent; 181 }; 182 183 #define HFI1_PSN_CREDIT 16 184 185 struct hfi1_opcode_stats { 186 u64 n_packets; /* number of packets */ 187 u64 n_bytes; /* total number of bytes */ 188 }; 189 190 struct hfi1_opcode_stats_perctx { 191 struct hfi1_opcode_stats stats[256]; 192 }; 193 194 static inline void inc_opstats( 195 u32 tlen, 196 struct hfi1_opcode_stats *stats) 197 { 198 #ifdef CONFIG_DEBUG_FS 199 stats->n_bytes += tlen; 200 stats->n_packets++; 201 #endif 202 } 203 204 struct hfi1_ibport { 205 struct rvt_qp __rcu *qp[2]; 206 struct rvt_ibport rvp; 207 208 /* the first 16 entries are sl_to_vl for !OPA */ 209 u8 sl_to_sc[32]; 210 u8 sc_to_sl[32]; 211 }; 212 213 struct hfi1_ibdev { 214 struct rvt_dev_info rdi; /* Must be first */ 215 216 /* QP numbers are shared by all IB ports */ 217 /* protect txwait list */ 218 seqlock_t txwait_lock ____cacheline_aligned_in_smp; 219 struct list_head txwait; /* list for wait verbs_txreq */ 220 struct list_head memwait; /* list for wait kernel memory */ 221 struct kmem_cache *verbs_txreq_cache; 222 u64 n_txwait; 223 u64 n_kmem_wait; 224 225 /* protect iowait lists */ 226 seqlock_t iowait_lock ____cacheline_aligned_in_smp; 227 u64 n_piowait; 228 u64 n_piodrain; 229 struct timer_list mem_timer; 230 231 #ifdef CONFIG_DEBUG_FS 232 /* per HFI debugfs */ 233 struct dentry *hfi1_ibdev_dbg; 234 /* per HFI symlinks to above */ 235 struct dentry *hfi1_ibdev_link; 236 #ifdef CONFIG_FAULT_INJECTION 237 struct fault *fault; 238 #endif 239 #endif 240 }; 241 242 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 243 { 244 struct rvt_dev_info *rdi; 245 246 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 247 return container_of(rdi, struct hfi1_ibdev, rdi); 248 } 249 250 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 251 { 252 struct hfi1_qp_priv *priv; 253 254 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 255 return priv->owner; 256 } 257 258 /* 259 * This must be called with s_lock held. 260 */ 261 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 262 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 263 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 264 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 265 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 266 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 267 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 268 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 269 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 270 u16 *out_mad_pkey_index); 271 272 /* 273 * The PSN_MASK and PSN_SHIFT allow for 274 * 1) comparing two PSNs 275 * 2) returning the PSN with any upper bits masked 276 * 3) returning the difference between to PSNs 277 * 278 * The number of significant bits in the PSN must 279 * necessarily be at least one bit less than 280 * the container holding the PSN. 281 */ 282 #define PSN_MASK 0x7FFFFFFF 283 #define PSN_SHIFT 1 284 #define PSN_MODIFY_MASK 0xFFFFFF 285 286 /* 287 * Compare two PSNs 288 * Returns an integer <, ==, or > than zero. 289 */ 290 static inline int cmp_psn(u32 a, u32 b) 291 { 292 return (((int)a) - ((int)b)) << PSN_SHIFT; 293 } 294 295 /* 296 * Return masked PSN 297 */ 298 static inline u32 mask_psn(u32 a) 299 { 300 return a & PSN_MASK; 301 } 302 303 /* 304 * Return delta between two PSNs 305 */ 306 static inline u32 delta_psn(u32 a, u32 b) 307 { 308 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 309 } 310 311 struct verbs_txreq; 312 void hfi1_put_txreq(struct verbs_txreq *tx); 313 314 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 315 316 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 317 bool release, bool copy_last); 318 319 void hfi1_cnp_rcv(struct hfi1_packet *packet); 320 321 void hfi1_uc_rcv(struct hfi1_packet *packet); 322 323 void hfi1_rc_rcv(struct hfi1_packet *packet); 324 325 void hfi1_rc_hdrerr( 326 struct hfi1_ctxtdata *rcd, 327 struct hfi1_packet *packet, 328 struct rvt_qp *qp); 329 330 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 331 332 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 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 void hfi1_migrate_qp(struct rvt_qp *qp); 339 340 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 341 int attr_mask, struct ib_udata *udata); 342 343 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 344 int attr_mask, struct ib_udata *udata); 345 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 346 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 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_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 367 enum ib_wc_status status); 368 369 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn); 370 371 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 372 373 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 374 375 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 376 377 int hfi1_register_ib_device(struct hfi1_devdata *); 378 379 void hfi1_unregister_ib_device(struct hfi1_devdata *); 380 381 void hfi1_ib_rcv(struct hfi1_packet *packet); 382 383 void hfi1_16B_rcv(struct hfi1_packet *packet); 384 385 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 386 387 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 388 u64 pbc); 389 390 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 391 u64 pbc); 392 393 int hfi1_wss_init(void); 394 void hfi1_wss_exit(void); 395 396 /* platform specific: return the lowest level cache (llc) size, in KiB */ 397 static inline int wss_llc_size(void) 398 { 399 /* assume that the boot CPU value is universal for all CPUs */ 400 return boot_cpu_data.x86_cache_size; 401 } 402 403 /* platform specific: cacheless copy */ 404 static inline void cacheless_memcpy(void *dst, void *src, size_t n) 405 { 406 /* 407 * Use the only available X64 cacheless copy. Add a __user cast 408 * to quiet sparse. The src agument is already in the kernel so 409 * there are no security issues. The extra fault recovery machinery 410 * is not invoked. 411 */ 412 __copy_user_nocache(dst, (void __user *)src, n, 0); 413 } 414 415 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr) 416 { 417 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ); 418 } 419 420 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 421 422 extern const u8 hdr_len_by_opcode[]; 423 424 extern const int ib_rvt_state_ops[]; 425 426 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 427 428 extern unsigned int hfi1_max_cqes; 429 430 extern unsigned int hfi1_max_cqs; 431 432 extern unsigned int hfi1_max_qp_wrs; 433 434 extern unsigned int hfi1_max_qps; 435 436 extern unsigned int hfi1_max_sges; 437 438 extern unsigned int hfi1_max_mcast_grps; 439 440 extern unsigned int hfi1_max_mcast_qp_attached; 441 442 extern unsigned int hfi1_max_srqs; 443 444 extern unsigned int hfi1_max_srq_sges; 445 446 extern unsigned int hfi1_max_srq_wrs; 447 448 extern unsigned short piothreshold; 449 450 extern const u32 ib_hfi1_rnr_table[]; 451 452 #endif /* HFI1_VERBS_H */ 453