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 struct hfi1_16b_header { 109 u32 lrh[4]; 110 union { 111 struct { 112 struct ib_grh grh; 113 struct ib_other_headers oth; 114 } l; 115 struct ib_other_headers oth; 116 } u; 117 } __packed; 118 119 struct hfi1_opa_header { 120 union { 121 struct ib_header ibh; /* 9B header */ 122 struct hfi1_16b_header opah; /* 16B header */ 123 }; 124 u8 hdr_type; /* 9B or 16B */ 125 } __packed; 126 127 struct hfi1_ahg_info { 128 u32 ahgdesc[2]; 129 u16 tx_flags; 130 u8 ahgcount; 131 u8 ahgidx; 132 }; 133 134 struct hfi1_sdma_header { 135 __le64 pbc; 136 struct hfi1_opa_header hdr; 137 } __packed; 138 139 /* 140 * hfi1 specific data structures that will be hidden from rvt after the queue 141 * pair is made common 142 */ 143 struct hfi1_qp_priv { 144 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */ 145 struct sdma_engine *s_sde; /* current sde */ 146 struct send_context *s_sendcontext; /* current sendcontext */ 147 u8 s_sc; /* SC[0..4] for next packet */ 148 struct iowait s_iowait; 149 struct rvt_qp *owner; 150 u8 hdr_type; /* 9B or 16B */ 151 }; 152 153 /* 154 * This structure is used to hold commonly lookedup and computed values during 155 * the send engine progress. 156 */ 157 struct hfi1_pkt_state { 158 struct hfi1_ibdev *dev; 159 struct hfi1_ibport *ibp; 160 struct hfi1_pportdata *ppd; 161 struct verbs_txreq *s_txreq; 162 unsigned long flags; 163 unsigned long timeout; 164 unsigned long timeout_int; 165 int cpu; 166 u8 opcode; 167 bool in_thread; 168 bool pkts_sent; 169 }; 170 171 #define HFI1_PSN_CREDIT 16 172 173 struct hfi1_opcode_stats { 174 u64 n_packets; /* number of packets */ 175 u64 n_bytes; /* total number of bytes */ 176 }; 177 178 struct hfi1_opcode_stats_perctx { 179 struct hfi1_opcode_stats stats[256]; 180 }; 181 182 static inline void inc_opstats( 183 u32 tlen, 184 struct hfi1_opcode_stats *stats) 185 { 186 #ifdef CONFIG_DEBUG_FS 187 stats->n_bytes += tlen; 188 stats->n_packets++; 189 #endif 190 } 191 192 struct hfi1_ibport { 193 struct rvt_qp __rcu *qp[2]; 194 struct rvt_ibport rvp; 195 196 /* the first 16 entries are sl_to_vl for !OPA */ 197 u8 sl_to_sc[32]; 198 u8 sc_to_sl[32]; 199 }; 200 201 struct hfi1_ibdev { 202 struct rvt_dev_info rdi; /* Must be first */ 203 204 /* QP numbers are shared by all IB ports */ 205 /* protect txwait list */ 206 seqlock_t txwait_lock ____cacheline_aligned_in_smp; 207 struct list_head txwait; /* list for wait verbs_txreq */ 208 struct list_head memwait; /* list for wait kernel memory */ 209 struct kmem_cache *verbs_txreq_cache; 210 u64 n_txwait; 211 u64 n_kmem_wait; 212 213 /* protect iowait lists */ 214 seqlock_t iowait_lock ____cacheline_aligned_in_smp; 215 u64 n_piowait; 216 u64 n_piodrain; 217 struct timer_list mem_timer; 218 219 #ifdef CONFIG_DEBUG_FS 220 /* per HFI debugfs */ 221 struct dentry *hfi1_ibdev_dbg; 222 /* per HFI symlinks to above */ 223 struct dentry *hfi1_ibdev_link; 224 #ifdef CONFIG_FAULT_INJECTION 225 struct fault_opcode *fault_opcode; 226 struct fault_packet *fault_packet; 227 bool fault_suppress_err; 228 #endif 229 #endif 230 }; 231 232 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev) 233 { 234 struct rvt_dev_info *rdi; 235 236 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 237 return container_of(rdi, struct hfi1_ibdev, rdi); 238 } 239 240 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait) 241 { 242 struct hfi1_qp_priv *priv; 243 244 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait); 245 return priv->owner; 246 } 247 248 /* 249 * Send if not busy or waiting for I/O and either 250 * a RC response is pending or we can process send work requests. 251 */ 252 static inline int hfi1_send_ok(struct rvt_qp *qp) 253 { 254 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && 255 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || 256 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 257 } 258 259 /* 260 * This must be called with s_lock held. 261 */ 262 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl, 263 u32 qp1, u32 qp2, u32 lid1, u32 lid2); 264 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 265 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp); 266 void hfi1_node_desc_chg(struct hfi1_ibport *ibp); 267 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port, 268 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 269 const struct ib_mad_hdr *in_mad, size_t in_mad_size, 270 struct ib_mad_hdr *out_mad, size_t *out_mad_size, 271 u16 *out_mad_pkey_index); 272 273 /* 274 * The PSN_MASK and PSN_SHIFT allow for 275 * 1) comparing two PSNs 276 * 2) returning the PSN with any upper bits masked 277 * 3) returning the difference between to PSNs 278 * 279 * The number of significant bits in the PSN must 280 * necessarily be at least one bit less than 281 * the container holding the PSN. 282 */ 283 #define PSN_MASK 0x7FFFFFFF 284 #define PSN_SHIFT 1 285 #define PSN_MODIFY_MASK 0xFFFFFF 286 287 /* 288 * Compare two PSNs 289 * Returns an integer <, ==, or > than zero. 290 */ 291 static inline int cmp_psn(u32 a, u32 b) 292 { 293 return (((int)a) - ((int)b)) << PSN_SHIFT; 294 } 295 296 /* 297 * Return masked PSN 298 */ 299 static inline u32 mask_psn(u32 a) 300 { 301 return a & PSN_MASK; 302 } 303 304 /* 305 * Return delta between two PSNs 306 */ 307 static inline u32 delta_psn(u32 a, u32 b) 308 { 309 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT; 310 } 311 312 struct verbs_txreq; 313 void hfi1_put_txreq(struct verbs_txreq *tx); 314 315 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 316 317 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 318 bool release, bool copy_last); 319 320 void hfi1_cnp_rcv(struct hfi1_packet *packet); 321 322 void hfi1_uc_rcv(struct hfi1_packet *packet); 323 324 void hfi1_rc_rcv(struct hfi1_packet *packet); 325 326 void hfi1_rc_hdrerr( 327 struct hfi1_ctxtdata *rcd, 328 struct hfi1_packet *packet, 329 struct rvt_qp *qp); 330 331 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 332 333 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah); 334 335 void hfi1_ud_rcv(struct hfi1_packet *packet); 336 337 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); 338 339 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only); 340 341 void hfi1_migrate_qp(struct rvt_qp *qp); 342 343 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 344 int attr_mask, struct ib_udata *udata); 345 346 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, 347 int attr_mask, struct ib_udata *udata); 348 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait); 349 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 350 351 extern const u32 rc_only_opcode; 352 extern const u32 uc_only_opcode; 353 354 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); 355 356 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, 357 const struct ib_global_route *grh, u32 hwords, u32 nwords); 358 359 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr, 360 u32 bth0, u32 bth2, int middle, 361 struct hfi1_pkt_state *ps); 362 363 void _hfi1_do_send(struct work_struct *work); 364 365 void hfi1_do_send_from_rvt(struct rvt_qp *qp); 366 367 void hfi1_do_send(struct rvt_qp *qp, bool in_thread); 368 369 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 370 enum ib_wc_status status); 371 372 void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp, 373 bool is_fecn); 374 375 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 376 377 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 378 379 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps); 380 381 int hfi1_register_ib_device(struct hfi1_devdata *); 382 383 void hfi1_unregister_ib_device(struct hfi1_devdata *); 384 385 void hfi1_ib_rcv(struct hfi1_packet *packet); 386 387 void hfi1_16B_rcv(struct hfi1_packet *packet); 388 389 unsigned hfi1_get_npkeys(struct hfi1_devdata *); 390 391 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 392 u64 pbc); 393 394 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, 395 u64 pbc); 396 397 int hfi1_wss_init(void); 398 void hfi1_wss_exit(void); 399 400 /* platform specific: return the lowest level cache (llc) size, in KiB */ 401 static inline int wss_llc_size(void) 402 { 403 /* assume that the boot CPU value is universal for all CPUs */ 404 return boot_cpu_data.x86_cache_size; 405 } 406 407 /* platform specific: cacheless copy */ 408 static inline void cacheless_memcpy(void *dst, void *src, size_t n) 409 { 410 /* 411 * Use the only available X64 cacheless copy. Add a __user cast 412 * to quiet sparse. The src agument is already in the kernel so 413 * there are no security issues. The extra fault recovery machinery 414 * is not invoked. 415 */ 416 __copy_user_nocache(dst, (void __user *)src, n, 0); 417 } 418 419 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[]; 420 421 extern const u8 hdr_len_by_opcode[]; 422 423 extern const int ib_rvt_state_ops[]; 424 425 extern __be64 ib_hfi1_sys_image_guid; /* in network order */ 426 427 extern unsigned int hfi1_max_cqes; 428 429 extern unsigned int hfi1_max_cqs; 430 431 extern unsigned int hfi1_max_qp_wrs; 432 433 extern unsigned int hfi1_max_qps; 434 435 extern unsigned int hfi1_max_sges; 436 437 extern unsigned int hfi1_max_mcast_grps; 438 439 extern unsigned int hfi1_max_mcast_qp_attached; 440 441 extern unsigned int hfi1_max_srqs; 442 443 extern unsigned int hfi1_max_srq_sges; 444 445 extern unsigned int hfi1_max_srq_wrs; 446 447 extern unsigned short piothreshold; 448 449 extern const u32 ib_hfi1_rnr_table[]; 450 451 #endif /* HFI1_VERBS_H */ 452