1 /* 2 * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. 3 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. 4 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #ifndef QIB_VERBS_H 36 #define QIB_VERBS_H 37 38 #include <linux/types.h> 39 #include <linux/spinlock.h> 40 #include <linux/kernel.h> 41 #include <linux/interrupt.h> 42 #include <linux/kref.h> 43 #include <linux/workqueue.h> 44 #include <linux/kthread.h> 45 #include <linux/completion.h> 46 #include <rdma/ib_pack.h> 47 #include <rdma/ib_user_verbs.h> 48 #include <rdma/rdma_vt.h> 49 #include <rdma/rdmavt_cq.h> 50 51 struct qib_ctxtdata; 52 struct qib_pportdata; 53 struct qib_devdata; 54 struct qib_verbs_txreq; 55 56 #define QIB_MAX_RDMA_ATOMIC 16 57 #define QIB_GUIDS_PER_PORT 5 58 #define QIB_PSN_SHIFT 8 59 60 /* 61 * Increment this value if any changes that break userspace ABI 62 * compatibility are made. 63 */ 64 #define QIB_UVERBS_ABI_VERSION 2 65 66 #define IB_SEQ_NAK (3 << 29) 67 68 /* AETH NAK opcode values */ 69 #define IB_RNR_NAK 0x20 70 #define IB_NAK_PSN_ERROR 0x60 71 #define IB_NAK_INVALID_REQUEST 0x61 72 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 73 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 74 #define IB_NAK_INVALID_RD_REQUEST 0x64 75 76 /* IB Performance Manager status values */ 77 #define IB_PMA_SAMPLE_STATUS_DONE 0x00 78 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 79 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 80 81 /* Mandatory IB performance counter select values. */ 82 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) 83 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) 84 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) 85 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) 86 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) 87 88 #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0) 89 90 #define IB_BTH_REQ_ACK (1 << 31) 91 #define IB_BTH_SOLICITED (1 << 23) 92 #define IB_BTH_MIG_REQ (1 << 22) 93 94 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */ 95 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26) 96 97 #define IB_GRH_VERSION 6 98 #define IB_GRH_VERSION_MASK 0xF 99 #define IB_GRH_VERSION_SHIFT 28 100 #define IB_GRH_TCLASS_MASK 0xFF 101 #define IB_GRH_TCLASS_SHIFT 20 102 #define IB_GRH_FLOW_MASK 0xFFFFF 103 #define IB_GRH_FLOW_SHIFT 0 104 #define IB_GRH_NEXT_HDR 0x1B 105 106 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) 107 108 /* Values for set/get portinfo VLCap OperationalVLs */ 109 #define IB_VL_VL0 1 110 #define IB_VL_VL0_1 2 111 #define IB_VL_VL0_3 3 112 #define IB_VL_VL0_7 4 113 #define IB_VL_VL0_14 5 114 115 static inline int qib_num_vls(int vls) 116 { 117 switch (vls) { 118 default: 119 case IB_VL_VL0: 120 return 1; 121 case IB_VL_VL0_1: 122 return 2; 123 case IB_VL_VL0_3: 124 return 4; 125 case IB_VL_VL0_7: 126 return 8; 127 case IB_VL_VL0_14: 128 return 15; 129 } 130 } 131 132 struct ib_reth { 133 __be64 vaddr; 134 __be32 rkey; 135 __be32 length; 136 } __packed; 137 138 struct ib_atomic_eth { 139 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */ 140 __be32 rkey; 141 __be64 swap_data; 142 __be64 compare_data; 143 } __packed; 144 145 struct qib_other_headers { 146 __be32 bth[3]; 147 union { 148 struct { 149 __be32 deth[2]; 150 __be32 imm_data; 151 } ud; 152 struct { 153 struct ib_reth reth; 154 __be32 imm_data; 155 } rc; 156 struct { 157 __be32 aeth; 158 __be32 atomic_ack_eth[2]; 159 } at; 160 __be32 imm_data; 161 __be32 aeth; 162 __be32 ieth; 163 struct ib_atomic_eth atomic_eth; 164 } u; 165 } __packed; 166 167 /* 168 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes 169 * long (72 w/ imm_data). Only the first 56 bytes of the IB header 170 * will be in the eager header buffer. The remaining 12 or 16 bytes 171 * are in the data buffer. 172 */ 173 struct qib_ib_header { 174 __be16 lrh[4]; 175 union { 176 struct { 177 struct ib_grh grh; 178 struct qib_other_headers oth; 179 } l; 180 struct qib_other_headers oth; 181 } u; 182 } __packed; 183 184 struct qib_pio_header { 185 __le32 pbc[2]; 186 struct qib_ib_header hdr; 187 } __packed; 188 189 /* 190 * qib specific data structure that will be hidden from rvt after the queue pair 191 * is made common. 192 */ 193 struct qib_qp_priv { 194 struct qib_ib_header *s_hdr; /* next packet header to send */ 195 struct list_head iowait; /* link for wait PIO buf */ 196 atomic_t s_dma_busy; 197 struct qib_verbs_txreq *s_tx; 198 struct work_struct s_work; 199 wait_queue_head_t wait_dma; 200 struct rvt_qp *owner; 201 }; 202 203 #define QIB_PSN_CREDIT 16 204 205 struct qib_opcode_stats { 206 u64 n_packets; /* number of packets */ 207 u64 n_bytes; /* total number of bytes */ 208 }; 209 210 struct qib_opcode_stats_perctx { 211 struct qib_opcode_stats stats[128]; 212 }; 213 214 struct qib_pma_counters { 215 u64 n_unicast_xmit; /* total unicast packets sent */ 216 u64 n_unicast_rcv; /* total unicast packets received */ 217 u64 n_multicast_xmit; /* total multicast packets sent */ 218 u64 n_multicast_rcv; /* total multicast packets received */ 219 }; 220 221 struct qib_ibport { 222 struct rvt_ibport rvp; 223 struct rvt_ah *smi_ah; 224 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */ 225 struct qib_pma_counters __percpu *pmastats; 226 u64 z_unicast_xmit; /* starting count for PMA */ 227 u64 z_unicast_rcv; /* starting count for PMA */ 228 u64 z_multicast_xmit; /* starting count for PMA */ 229 u64 z_multicast_rcv; /* starting count for PMA */ 230 u64 z_symbol_error_counter; /* starting count for PMA */ 231 u64 z_link_error_recovery_counter; /* starting count for PMA */ 232 u64 z_link_downed_counter; /* starting count for PMA */ 233 u64 z_port_rcv_errors; /* starting count for PMA */ 234 u64 z_port_rcv_remphys_errors; /* starting count for PMA */ 235 u64 z_port_xmit_discards; /* starting count for PMA */ 236 u64 z_port_xmit_data; /* starting count for PMA */ 237 u64 z_port_rcv_data; /* starting count for PMA */ 238 u64 z_port_xmit_packets; /* starting count for PMA */ 239 u64 z_port_rcv_packets; /* starting count for PMA */ 240 u32 z_local_link_integrity_errors; /* starting count for PMA */ 241 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */ 242 u32 z_vl15_dropped; /* starting count for PMA */ 243 u8 sl_to_vl[16]; 244 }; 245 246 struct qib_ibdev { 247 struct rvt_dev_info rdi; 248 249 struct list_head piowait; /* list for wait PIO buf */ 250 struct list_head dmawait; /* list for wait DMA */ 251 struct list_head txwait; /* list for wait qib_verbs_txreq */ 252 struct list_head memwait; /* list for wait kernel memory */ 253 struct list_head txreq_free; 254 struct timer_list mem_timer; 255 struct qib_pio_header *pio_hdrs; 256 dma_addr_t pio_hdrs_phys; 257 u32 qp_rnd; /* random bytes for hash */ 258 259 u32 n_piowait; 260 u32 n_txwait; 261 262 #ifdef CONFIG_DEBUG_FS 263 /* per HCA debugfs */ 264 struct dentry *qib_ibdev_dbg; 265 #endif 266 }; 267 268 struct qib_verbs_counters { 269 u64 symbol_error_counter; 270 u64 link_error_recovery_counter; 271 u64 link_downed_counter; 272 u64 port_rcv_errors; 273 u64 port_rcv_remphys_errors; 274 u64 port_xmit_discards; 275 u64 port_xmit_data; 276 u64 port_rcv_data; 277 u64 port_xmit_packets; 278 u64 port_rcv_packets; 279 u32 local_link_integrity_errors; 280 u32 excessive_buffer_overrun_errors; 281 u32 vl15_dropped; 282 }; 283 284 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev) 285 { 286 struct rvt_dev_info *rdi; 287 288 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 289 return container_of(rdi, struct qib_ibdev, rdi); 290 } 291 292 /* 293 * Send if not busy or waiting for I/O and either 294 * a RC response is pending or we can process send work requests. 295 */ 296 static inline int qib_send_ok(struct rvt_qp *qp) 297 { 298 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && 299 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || 300 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 301 } 302 303 void _qib_schedule_send(struct rvt_qp *qp); 304 void qib_schedule_send(struct rvt_qp *qp); 305 306 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2) 307 { 308 u16 p1 = pkey1 & 0x7FFF; 309 u16 p2 = pkey2 & 0x7FFF; 310 311 /* 312 * Low 15 bits must be non-zero and match, and 313 * one of the two must be a full member. 314 */ 315 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0); 316 } 317 318 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl, 319 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2); 320 void qib_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 321 void qib_sys_guid_chg(struct qib_ibport *ibp); 322 void qib_node_desc_chg(struct qib_ibport *ibp); 323 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 324 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 325 const struct ib_mad_hdr *in, size_t in_mad_size, 326 struct ib_mad_hdr *out, size_t *out_mad_size, 327 u16 *out_mad_pkey_index); 328 void qib_notify_create_mad_agent(struct rvt_dev_info *rdi, int port_idx); 329 void qib_notify_free_mad_agent(struct rvt_dev_info *rdi, int port_idx); 330 331 /* 332 * Compare the lower 24 bits of the two values. 333 * Returns an integer <, ==, or > than zero. 334 */ 335 static inline int qib_cmp24(u32 a, u32 b) 336 { 337 return (((int) a) - ((int) b)) << 8; 338 } 339 340 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, 341 u64 *rwords, u64 *spkts, u64 *rpkts, 342 u64 *xmit_wait); 343 344 int qib_get_counters(struct qib_pportdata *ppd, 345 struct qib_verbs_counters *cntrs); 346 347 __be32 qib_compute_aeth(struct rvt_qp *qp); 348 349 /* 350 * Functions provided by qib driver for rdmavt to use 351 */ 352 unsigned qib_free_all_qps(struct rvt_dev_info *rdi); 353 void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp, gfp_t gfp); 354 void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); 355 void qib_notify_qp_reset(struct rvt_qp *qp); 356 int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, 357 enum ib_qp_type type, u8 port, gfp_t gfp); 358 359 #ifdef CONFIG_DEBUG_FS 360 361 struct qib_qp_iter; 362 363 struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev); 364 365 int qib_qp_iter_next(struct qib_qp_iter *iter); 366 367 void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter); 368 369 #endif 370 371 void qib_get_credit(struct rvt_qp *qp, u32 aeth); 372 373 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult); 374 375 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail); 376 377 void qib_put_txreq(struct qib_verbs_txreq *tx); 378 379 int qib_verbs_send(struct rvt_qp *qp, struct qib_ib_header *hdr, 380 u32 hdrwords, struct rvt_sge_state *ss, u32 len); 381 382 void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 383 int release); 384 385 void qib_skip_sge(struct rvt_sge_state *ss, u32 length, int release); 386 387 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 388 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 389 390 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, 391 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 392 393 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); 394 395 int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 396 397 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid); 398 399 void qib_rc_rnr_retry(unsigned long arg); 400 401 void qib_rc_send_complete(struct rvt_qp *qp, struct qib_ib_header *hdr); 402 403 void qib_rc_error(struct rvt_qp *qp, enum ib_wc_status err); 404 405 int qib_post_ud_send(struct rvt_qp *qp, struct ib_send_wr *wr); 406 407 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 408 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 409 410 void mr_rcu_callback(struct rcu_head *list); 411 412 int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only); 413 414 void qib_migrate_qp(struct rvt_qp *qp); 415 416 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr, 417 int has_grh, struct rvt_qp *qp, u32 bth0); 418 419 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr, 420 struct ib_global_route *grh, u32 hwords, u32 nwords); 421 422 void qib_make_ruc_header(struct rvt_qp *qp, struct qib_other_headers *ohdr, 423 u32 bth0, u32 bth2); 424 425 void _qib_do_send(struct work_struct *work); 426 427 void qib_do_send(struct rvt_qp *qp); 428 429 void qib_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 430 enum ib_wc_status status); 431 432 void qib_send_rc_ack(struct rvt_qp *qp); 433 434 int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags); 435 436 int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags); 437 438 int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags); 439 440 int qib_register_ib_device(struct qib_devdata *); 441 442 void qib_unregister_ib_device(struct qib_devdata *); 443 444 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32); 445 446 void qib_ib_piobufavail(struct qib_devdata *); 447 448 unsigned qib_get_npkeys(struct qib_devdata *); 449 450 unsigned qib_get_pkey(struct qib_ibport *, unsigned); 451 452 extern const enum ib_wc_opcode ib_qib_wc_opcode[]; 453 454 /* 455 * Below HCA-independent IB PhysPortState values, returned 456 * by the f_ibphys_portstate() routine. 457 */ 458 #define IB_PHYSPORTSTATE_SLEEP 1 459 #define IB_PHYSPORTSTATE_POLL 2 460 #define IB_PHYSPORTSTATE_DISABLED 3 461 #define IB_PHYSPORTSTATE_CFG_TRAIN 4 462 #define IB_PHYSPORTSTATE_LINKUP 5 463 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6 464 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8 465 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB 466 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC 467 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE 468 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF 469 #define IB_PHYSPORTSTATE_CFG_ENH 0x10 470 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13 471 472 extern const int ib_rvt_state_ops[]; 473 474 extern __be64 ib_qib_sys_image_guid; /* in network order */ 475 476 extern unsigned int ib_rvt_lkey_table_size; 477 478 extern unsigned int ib_qib_max_cqes; 479 480 extern unsigned int ib_qib_max_cqs; 481 482 extern unsigned int ib_qib_max_qp_wrs; 483 484 extern unsigned int ib_qib_max_qps; 485 486 extern unsigned int ib_qib_max_sges; 487 488 extern unsigned int ib_qib_max_mcast_grps; 489 490 extern unsigned int ib_qib_max_mcast_qp_attached; 491 492 extern unsigned int ib_qib_max_srqs; 493 494 extern unsigned int ib_qib_max_srq_sges; 495 496 extern unsigned int ib_qib_max_srq_wrs; 497 498 extern const u32 ib_qib_rnr_table[]; 499 500 extern const struct rvt_operation_params qib_post_parms[]; 501 502 #endif /* QIB_VERBS_H */ 503