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 struct ib_atomic_eth atomic_eth; 163 } u; 164 } __packed; 165 166 /* 167 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes 168 * long (72 w/ imm_data). Only the first 56 bytes of the IB header 169 * will be in the eager header buffer. The remaining 12 or 16 bytes 170 * are in the data buffer. 171 */ 172 struct qib_ib_header { 173 __be16 lrh[4]; 174 union { 175 struct { 176 struct ib_grh grh; 177 struct qib_other_headers oth; 178 } l; 179 struct qib_other_headers oth; 180 } u; 181 } __packed; 182 183 struct qib_pio_header { 184 __le32 pbc[2]; 185 struct qib_ib_header hdr; 186 } __packed; 187 188 /* 189 * qib specific data structure that will be hidden from rvt after the queue pair 190 * is made common. 191 */ 192 struct qib_qp_priv { 193 struct qib_ib_header *s_hdr; /* next packet header to send */ 194 struct list_head iowait; /* link for wait PIO buf */ 195 atomic_t s_dma_busy; 196 struct qib_verbs_txreq *s_tx; 197 struct work_struct s_work; 198 wait_queue_head_t wait_dma; 199 struct rvt_qp *owner; 200 }; 201 202 #define QIB_PSN_CREDIT 16 203 204 struct qib_opcode_stats { 205 u64 n_packets; /* number of packets */ 206 u64 n_bytes; /* total number of bytes */ 207 }; 208 209 struct qib_opcode_stats_perctx { 210 struct qib_opcode_stats stats[128]; 211 }; 212 213 struct qib_pma_counters { 214 u64 n_unicast_xmit; /* total unicast packets sent */ 215 u64 n_unicast_rcv; /* total unicast packets received */ 216 u64 n_multicast_xmit; /* total multicast packets sent */ 217 u64 n_multicast_rcv; /* total multicast packets received */ 218 }; 219 220 struct qib_ibport { 221 struct rvt_ibport rvp; 222 struct rvt_ah *smi_ah; 223 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */ 224 struct qib_pma_counters __percpu *pmastats; 225 u64 z_unicast_xmit; /* starting count for PMA */ 226 u64 z_unicast_rcv; /* starting count for PMA */ 227 u64 z_multicast_xmit; /* starting count for PMA */ 228 u64 z_multicast_rcv; /* starting count for PMA */ 229 u64 z_symbol_error_counter; /* starting count for PMA */ 230 u64 z_link_error_recovery_counter; /* starting count for PMA */ 231 u64 z_link_downed_counter; /* starting count for PMA */ 232 u64 z_port_rcv_errors; /* starting count for PMA */ 233 u64 z_port_rcv_remphys_errors; /* starting count for PMA */ 234 u64 z_port_xmit_discards; /* starting count for PMA */ 235 u64 z_port_xmit_data; /* starting count for PMA */ 236 u64 z_port_rcv_data; /* starting count for PMA */ 237 u64 z_port_xmit_packets; /* starting count for PMA */ 238 u64 z_port_rcv_packets; /* starting count for PMA */ 239 u32 z_local_link_integrity_errors; /* starting count for PMA */ 240 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */ 241 u32 z_vl15_dropped; /* starting count for PMA */ 242 u8 sl_to_vl[16]; 243 }; 244 245 struct qib_ibdev { 246 struct rvt_dev_info rdi; 247 248 struct list_head piowait; /* list for wait PIO buf */ 249 struct list_head dmawait; /* list for wait DMA */ 250 struct list_head txwait; /* list for wait qib_verbs_txreq */ 251 struct list_head memwait; /* list for wait kernel memory */ 252 struct list_head txreq_free; 253 struct timer_list mem_timer; 254 struct qib_pio_header *pio_hdrs; 255 dma_addr_t pio_hdrs_phys; 256 u32 qp_rnd; /* random bytes for hash */ 257 258 u32 n_piowait; 259 u32 n_txwait; 260 261 #ifdef CONFIG_DEBUG_FS 262 /* per HCA debugfs */ 263 struct dentry *qib_ibdev_dbg; 264 #endif 265 }; 266 267 struct qib_verbs_counters { 268 u64 symbol_error_counter; 269 u64 link_error_recovery_counter; 270 u64 link_downed_counter; 271 u64 port_rcv_errors; 272 u64 port_rcv_remphys_errors; 273 u64 port_xmit_discards; 274 u64 port_xmit_data; 275 u64 port_rcv_data; 276 u64 port_xmit_packets; 277 u64 port_rcv_packets; 278 u32 local_link_integrity_errors; 279 u32 excessive_buffer_overrun_errors; 280 u32 vl15_dropped; 281 }; 282 283 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev) 284 { 285 struct rvt_dev_info *rdi; 286 287 rdi = container_of(ibdev, struct rvt_dev_info, ibdev); 288 return container_of(rdi, struct qib_ibdev, rdi); 289 } 290 291 /* 292 * Send if not busy or waiting for I/O and either 293 * a RC response is pending or we can process send work requests. 294 */ 295 static inline int qib_send_ok(struct rvt_qp *qp) 296 { 297 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && 298 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || 299 !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); 300 } 301 302 void _qib_schedule_send(struct rvt_qp *qp); 303 void qib_schedule_send(struct rvt_qp *qp); 304 305 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2) 306 { 307 u16 p1 = pkey1 & 0x7FFF; 308 u16 p2 = pkey2 & 0x7FFF; 309 310 /* 311 * Low 15 bits must be non-zero and match, and 312 * one of the two must be a full member. 313 */ 314 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0); 315 } 316 317 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl, 318 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2); 319 void qib_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num); 320 void qib_sys_guid_chg(struct qib_ibport *ibp); 321 void qib_node_desc_chg(struct qib_ibport *ibp); 322 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 323 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 324 const struct ib_mad_hdr *in, size_t in_mad_size, 325 struct ib_mad_hdr *out, size_t *out_mad_size, 326 u16 *out_mad_pkey_index); 327 void qib_notify_create_mad_agent(struct rvt_dev_info *rdi, int port_idx); 328 void qib_notify_free_mad_agent(struct rvt_dev_info *rdi, int port_idx); 329 330 /* 331 * Compare the lower 24 bits of the two values. 332 * Returns an integer <, ==, or > than zero. 333 */ 334 static inline int qib_cmp24(u32 a, u32 b) 335 { 336 return (((int) a) - ((int) b)) << 8; 337 } 338 339 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, 340 u64 *rwords, u64 *spkts, u64 *rpkts, 341 u64 *xmit_wait); 342 343 int qib_get_counters(struct qib_pportdata *ppd, 344 struct qib_verbs_counters *cntrs); 345 346 __be32 qib_compute_aeth(struct rvt_qp *qp); 347 348 /* 349 * Functions provided by qib driver for rdmavt to use 350 */ 351 unsigned qib_free_all_qps(struct rvt_dev_info *rdi); 352 void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp, gfp_t gfp); 353 void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); 354 void qib_notify_qp_reset(struct rvt_qp *qp); 355 int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, 356 enum ib_qp_type type, u8 port, gfp_t gfp); 357 358 #ifdef CONFIG_DEBUG_FS 359 360 struct qib_qp_iter; 361 362 struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev); 363 364 int qib_qp_iter_next(struct qib_qp_iter *iter); 365 366 void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter); 367 368 #endif 369 370 void qib_get_credit(struct rvt_qp *qp, u32 aeth); 371 372 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult); 373 374 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail); 375 376 void qib_put_txreq(struct qib_verbs_txreq *tx); 377 378 int qib_verbs_send(struct rvt_qp *qp, struct qib_ib_header *hdr, 379 u32 hdrwords, struct rvt_sge_state *ss, u32 len); 380 381 void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, 382 int release); 383 384 void qib_skip_sge(struct rvt_sge_state *ss, u32 length, int release); 385 386 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 387 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 388 389 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, 390 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 391 392 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); 393 394 int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); 395 396 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid); 397 398 void qib_rc_rnr_retry(unsigned long arg); 399 400 void qib_rc_send_complete(struct rvt_qp *qp, struct qib_ib_header *hdr); 401 402 void qib_rc_error(struct rvt_qp *qp, enum ib_wc_status err); 403 404 int qib_post_ud_send(struct rvt_qp *qp, struct ib_send_wr *wr); 405 406 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 407 int has_grh, void *data, u32 tlen, struct rvt_qp *qp); 408 409 void mr_rcu_callback(struct rcu_head *list); 410 411 int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only); 412 413 void qib_migrate_qp(struct rvt_qp *qp); 414 415 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr, 416 int has_grh, struct rvt_qp *qp, u32 bth0); 417 418 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr, 419 struct ib_global_route *grh, u32 hwords, u32 nwords); 420 421 void qib_make_ruc_header(struct rvt_qp *qp, struct qib_other_headers *ohdr, 422 u32 bth0, u32 bth2); 423 424 void _qib_do_send(struct work_struct *work); 425 426 void qib_do_send(struct rvt_qp *qp); 427 428 void qib_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, 429 enum ib_wc_status status); 430 431 void qib_send_rc_ack(struct rvt_qp *qp); 432 433 int qib_make_rc_req(struct rvt_qp *qp); 434 435 int qib_make_uc_req(struct rvt_qp *qp); 436 437 int qib_make_ud_req(struct rvt_qp *qp); 438 439 int qib_register_ib_device(struct qib_devdata *); 440 441 void qib_unregister_ib_device(struct qib_devdata *); 442 443 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32); 444 445 void qib_ib_piobufavail(struct qib_devdata *); 446 447 unsigned qib_get_npkeys(struct qib_devdata *); 448 449 unsigned qib_get_pkey(struct qib_ibport *, unsigned); 450 451 extern const enum ib_wc_opcode ib_qib_wc_opcode[]; 452 453 /* 454 * Below HCA-independent IB PhysPortState values, returned 455 * by the f_ibphys_portstate() routine. 456 */ 457 #define IB_PHYSPORTSTATE_SLEEP 1 458 #define IB_PHYSPORTSTATE_POLL 2 459 #define IB_PHYSPORTSTATE_DISABLED 3 460 #define IB_PHYSPORTSTATE_CFG_TRAIN 4 461 #define IB_PHYSPORTSTATE_LINKUP 5 462 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6 463 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8 464 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB 465 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC 466 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE 467 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF 468 #define IB_PHYSPORTSTATE_CFG_ENH 0x10 469 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13 470 471 extern const int ib_rvt_state_ops[]; 472 473 extern __be64 ib_qib_sys_image_guid; /* in network order */ 474 475 extern unsigned int ib_rvt_lkey_table_size; 476 477 extern unsigned int ib_qib_max_cqes; 478 479 extern unsigned int ib_qib_max_cqs; 480 481 extern unsigned int ib_qib_max_qp_wrs; 482 483 extern unsigned int ib_qib_max_qps; 484 485 extern unsigned int ib_qib_max_sges; 486 487 extern unsigned int ib_qib_max_mcast_grps; 488 489 extern unsigned int ib_qib_max_mcast_qp_attached; 490 491 extern unsigned int ib_qib_max_srqs; 492 493 extern unsigned int ib_qib_max_srq_sges; 494 495 extern unsigned int ib_qib_max_srq_wrs; 496 497 extern const u32 ib_qib_rnr_table[]; 498 499 #endif /* QIB_VERBS_H */ 500