1 /* 2 * Copyright (c) 2012 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/completion.h> 45 #include <rdma/ib_pack.h> 46 #include <rdma/ib_user_verbs.h> 47 48 struct qib_ctxtdata; 49 struct qib_pportdata; 50 struct qib_devdata; 51 struct qib_verbs_txreq; 52 53 #define QIB_MAX_RDMA_ATOMIC 16 54 #define QIB_GUIDS_PER_PORT 5 55 56 #define QPN_MAX (1 << 24) 57 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE) 58 59 /* 60 * Increment this value if any changes that break userspace ABI 61 * compatibility are made. 62 */ 63 #define QIB_UVERBS_ABI_VERSION 2 64 65 /* 66 * Define an ib_cq_notify value that is not valid so we know when CQ 67 * notifications are armed. 68 */ 69 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1) 70 71 #define IB_SEQ_NAK (3 << 29) 72 73 /* AETH NAK opcode values */ 74 #define IB_RNR_NAK 0x20 75 #define IB_NAK_PSN_ERROR 0x60 76 #define IB_NAK_INVALID_REQUEST 0x61 77 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 78 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 79 #define IB_NAK_INVALID_RD_REQUEST 0x64 80 81 /* Flags for checking QP state (see ib_qib_state_ops[]) */ 82 #define QIB_POST_SEND_OK 0x01 83 #define QIB_POST_RECV_OK 0x02 84 #define QIB_PROCESS_RECV_OK 0x04 85 #define QIB_PROCESS_SEND_OK 0x08 86 #define QIB_PROCESS_NEXT_SEND_OK 0x10 87 #define QIB_FLUSH_SEND 0x20 88 #define QIB_FLUSH_RECV 0x40 89 #define QIB_PROCESS_OR_FLUSH_SEND \ 90 (QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND) 91 92 /* IB Performance Manager status values */ 93 #define IB_PMA_SAMPLE_STATUS_DONE 0x00 94 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 95 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 96 97 /* Mandatory IB performance counter select values. */ 98 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) 99 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) 100 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) 101 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) 102 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) 103 104 #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0) 105 106 #define IB_BTH_REQ_ACK (1 << 31) 107 #define IB_BTH_SOLICITED (1 << 23) 108 #define IB_BTH_MIG_REQ (1 << 22) 109 110 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */ 111 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26) 112 113 #define IB_GRH_VERSION 6 114 #define IB_GRH_VERSION_MASK 0xF 115 #define IB_GRH_VERSION_SHIFT 28 116 #define IB_GRH_TCLASS_MASK 0xFF 117 #define IB_GRH_TCLASS_SHIFT 20 118 #define IB_GRH_FLOW_MASK 0xFFFFF 119 #define IB_GRH_FLOW_SHIFT 0 120 #define IB_GRH_NEXT_HDR 0x1B 121 122 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) 123 124 /* Values for set/get portinfo VLCap OperationalVLs */ 125 #define IB_VL_VL0 1 126 #define IB_VL_VL0_1 2 127 #define IB_VL_VL0_3 3 128 #define IB_VL_VL0_7 4 129 #define IB_VL_VL0_14 5 130 131 static inline int qib_num_vls(int vls) 132 { 133 switch (vls) { 134 default: 135 case IB_VL_VL0: 136 return 1; 137 case IB_VL_VL0_1: 138 return 2; 139 case IB_VL_VL0_3: 140 return 4; 141 case IB_VL_VL0_7: 142 return 8; 143 case IB_VL_VL0_14: 144 return 15; 145 } 146 } 147 148 struct ib_reth { 149 __be64 vaddr; 150 __be32 rkey; 151 __be32 length; 152 } __attribute__ ((packed)); 153 154 struct ib_atomic_eth { 155 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */ 156 __be32 rkey; 157 __be64 swap_data; 158 __be64 compare_data; 159 } __attribute__ ((packed)); 160 161 struct qib_other_headers { 162 __be32 bth[3]; 163 union { 164 struct { 165 __be32 deth[2]; 166 __be32 imm_data; 167 } ud; 168 struct { 169 struct ib_reth reth; 170 __be32 imm_data; 171 } rc; 172 struct { 173 __be32 aeth; 174 __be32 atomic_ack_eth[2]; 175 } at; 176 __be32 imm_data; 177 __be32 aeth; 178 struct ib_atomic_eth atomic_eth; 179 } u; 180 } __attribute__ ((packed)); 181 182 /* 183 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes 184 * long (72 w/ imm_data). Only the first 56 bytes of the IB header 185 * will be in the eager header buffer. The remaining 12 or 16 bytes 186 * are in the data buffer. 187 */ 188 struct qib_ib_header { 189 __be16 lrh[4]; 190 union { 191 struct { 192 struct ib_grh grh; 193 struct qib_other_headers oth; 194 } l; 195 struct qib_other_headers oth; 196 } u; 197 } __attribute__ ((packed)); 198 199 struct qib_pio_header { 200 __le32 pbc[2]; 201 struct qib_ib_header hdr; 202 } __attribute__ ((packed)); 203 204 /* 205 * There is one struct qib_mcast for each multicast GID. 206 * All attached QPs are then stored as a list of 207 * struct qib_mcast_qp. 208 */ 209 struct qib_mcast_qp { 210 struct list_head list; 211 struct qib_qp *qp; 212 }; 213 214 struct qib_mcast { 215 struct rb_node rb_node; 216 union ib_gid mgid; 217 struct list_head qp_list; 218 wait_queue_head_t wait; 219 atomic_t refcount; 220 int n_attached; 221 }; 222 223 /* Protection domain */ 224 struct qib_pd { 225 struct ib_pd ibpd; 226 int user; /* non-zero if created from user space */ 227 }; 228 229 /* Address Handle */ 230 struct qib_ah { 231 struct ib_ah ibah; 232 struct ib_ah_attr attr; 233 atomic_t refcount; 234 }; 235 236 /* 237 * This structure is used by qib_mmap() to validate an offset 238 * when an mmap() request is made. The vm_area_struct then uses 239 * this as its vm_private_data. 240 */ 241 struct qib_mmap_info { 242 struct list_head pending_mmaps; 243 struct ib_ucontext *context; 244 void *obj; 245 __u64 offset; 246 struct kref ref; 247 unsigned size; 248 }; 249 250 /* 251 * This structure is used to contain the head pointer, tail pointer, 252 * and completion queue entries as a single memory allocation so 253 * it can be mmap'ed into user space. 254 */ 255 struct qib_cq_wc { 256 u32 head; /* index of next entry to fill */ 257 u32 tail; /* index of next ib_poll_cq() entry */ 258 union { 259 /* these are actually size ibcq.cqe + 1 */ 260 struct ib_uverbs_wc uqueue[0]; 261 struct ib_wc kqueue[0]; 262 }; 263 }; 264 265 /* 266 * The completion queue structure. 267 */ 268 struct qib_cq { 269 struct ib_cq ibcq; 270 struct work_struct comptask; 271 spinlock_t lock; /* protect changes in this struct */ 272 u8 notify; 273 u8 triggered; 274 struct qib_cq_wc *queue; 275 struct qib_mmap_info *ip; 276 }; 277 278 /* 279 * A segment is a linear region of low physical memory. 280 * XXX Maybe we should use phys addr here and kmap()/kunmap(). 281 * Used by the verbs layer. 282 */ 283 struct qib_seg { 284 void *vaddr; 285 size_t length; 286 }; 287 288 /* The number of qib_segs that fit in a page. */ 289 #define QIB_SEGSZ (PAGE_SIZE / sizeof(struct qib_seg)) 290 291 struct qib_segarray { 292 struct qib_seg segs[QIB_SEGSZ]; 293 }; 294 295 struct qib_mregion { 296 struct ib_pd *pd; /* shares refcnt of ibmr.pd */ 297 u64 user_base; /* User's address for this region */ 298 u64 iova; /* IB start address of this region */ 299 size_t length; 300 u32 lkey; 301 u32 offset; /* offset (bytes) to start of region */ 302 int access_flags; 303 u32 max_segs; /* number of qib_segs in all the arrays */ 304 u32 mapsz; /* size of the map array */ 305 u8 page_shift; /* 0 - non unform/non powerof2 sizes */ 306 u8 lkey_published; /* in global table */ 307 struct completion comp; /* complete when refcount goes to zero */ 308 struct rcu_head list; 309 atomic_t refcount; 310 struct qib_segarray *map[0]; /* the segments */ 311 }; 312 313 /* 314 * These keep track of the copy progress within a memory region. 315 * Used by the verbs layer. 316 */ 317 struct qib_sge { 318 struct qib_mregion *mr; 319 void *vaddr; /* kernel virtual address of segment */ 320 u32 sge_length; /* length of the SGE */ 321 u32 length; /* remaining length of the segment */ 322 u16 m; /* current index: mr->map[m] */ 323 u16 n; /* current index: mr->map[m]->segs[n] */ 324 }; 325 326 /* Memory region */ 327 struct qib_mr { 328 struct ib_mr ibmr; 329 struct ib_umem *umem; 330 struct qib_mregion mr; /* must be last */ 331 }; 332 333 /* 334 * Send work request queue entry. 335 * The size of the sg_list is determined when the QP is created and stored 336 * in qp->s_max_sge. 337 */ 338 struct qib_swqe { 339 struct ib_send_wr wr; /* don't use wr.sg_list */ 340 u32 psn; /* first packet sequence number */ 341 u32 lpsn; /* last packet sequence number */ 342 u32 ssn; /* send sequence number */ 343 u32 length; /* total length of data in sg_list */ 344 struct qib_sge sg_list[0]; 345 }; 346 347 /* 348 * Receive work request queue entry. 349 * The size of the sg_list is determined when the QP (or SRQ) is created 350 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge). 351 */ 352 struct qib_rwqe { 353 u64 wr_id; 354 u8 num_sge; 355 struct ib_sge sg_list[0]; 356 }; 357 358 /* 359 * This structure is used to contain the head pointer, tail pointer, 360 * and receive work queue entries as a single memory allocation so 361 * it can be mmap'ed into user space. 362 * Note that the wq array elements are variable size so you can't 363 * just index into the array to get the N'th element; 364 * use get_rwqe_ptr() instead. 365 */ 366 struct qib_rwq { 367 u32 head; /* new work requests posted to the head */ 368 u32 tail; /* receives pull requests from here. */ 369 struct qib_rwqe wq[0]; 370 }; 371 372 struct qib_rq { 373 struct qib_rwq *wq; 374 u32 size; /* size of RWQE array */ 375 u8 max_sge; 376 spinlock_t lock /* protect changes in this struct */ 377 ____cacheline_aligned_in_smp; 378 }; 379 380 struct qib_srq { 381 struct ib_srq ibsrq; 382 struct qib_rq rq; 383 struct qib_mmap_info *ip; 384 /* send signal when number of RWQEs < limit */ 385 u32 limit; 386 }; 387 388 struct qib_sge_state { 389 struct qib_sge *sg_list; /* next SGE to be used if any */ 390 struct qib_sge sge; /* progress state for the current SGE */ 391 u32 total_len; 392 u8 num_sge; 393 }; 394 395 /* 396 * This structure holds the information that the send tasklet needs 397 * to send a RDMA read response or atomic operation. 398 */ 399 struct qib_ack_entry { 400 u8 opcode; 401 u8 sent; 402 u32 psn; 403 u32 lpsn; 404 union { 405 struct qib_sge rdma_sge; 406 u64 atomic_data; 407 }; 408 }; 409 410 /* 411 * Variables prefixed with s_ are for the requester (sender). 412 * Variables prefixed with r_ are for the responder (receiver). 413 * Variables prefixed with ack_ are for responder replies. 414 * 415 * Common variables are protected by both r_rq.lock and s_lock in that order 416 * which only happens in modify_qp() or changing the QP 'state'. 417 */ 418 struct qib_qp { 419 struct ib_qp ibqp; 420 /* read mostly fields above and below */ 421 struct ib_ah_attr remote_ah_attr; 422 struct ib_ah_attr alt_ah_attr; 423 struct qib_qp __rcu *next; /* link list for QPN hash table */ 424 struct qib_swqe *s_wq; /* send work queue */ 425 struct qib_mmap_info *ip; 426 struct qib_ib_header *s_hdr; /* next packet header to send */ 427 unsigned long timeout_jiffies; /* computed from timeout */ 428 429 enum ib_mtu path_mtu; 430 u32 remote_qpn; 431 u32 pmtu; /* decoded from path_mtu */ 432 u32 qkey; /* QKEY for this QP (for UD or RD) */ 433 u32 s_size; /* send work queue size */ 434 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */ 435 436 u8 state; /* QP state */ 437 u8 qp_access_flags; 438 u8 alt_timeout; /* Alternate path timeout for this QP */ 439 u8 timeout; /* Timeout for this QP */ 440 u8 s_srate; 441 u8 s_mig_state; 442 u8 port_num; 443 u8 s_pkey_index; /* PKEY index to use */ 444 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */ 445 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */ 446 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */ 447 u8 s_retry_cnt; /* number of times to retry */ 448 u8 s_rnr_retry_cnt; 449 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */ 450 u8 s_max_sge; /* size of s_wq->sg_list */ 451 u8 s_draining; 452 453 /* start of read/write fields */ 454 455 atomic_t refcount ____cacheline_aligned_in_smp; 456 wait_queue_head_t wait; 457 458 459 struct qib_ack_entry s_ack_queue[QIB_MAX_RDMA_ATOMIC + 1] 460 ____cacheline_aligned_in_smp; 461 struct qib_sge_state s_rdma_read_sge; 462 463 spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */ 464 unsigned long r_aflags; 465 u64 r_wr_id; /* ID for current receive WQE */ 466 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */ 467 u32 r_len; /* total length of r_sge */ 468 u32 r_rcv_len; /* receive data len processed */ 469 u32 r_psn; /* expected rcv packet sequence number */ 470 u32 r_msn; /* message sequence number */ 471 472 u8 r_state; /* opcode of last packet received */ 473 u8 r_flags; 474 u8 r_head_ack_queue; /* index into s_ack_queue[] */ 475 476 struct list_head rspwait; /* link for waititing to respond */ 477 478 struct qib_sge_state r_sge; /* current receive data */ 479 struct qib_rq r_rq; /* receive work queue */ 480 481 spinlock_t s_lock ____cacheline_aligned_in_smp; 482 struct qib_sge_state *s_cur_sge; 483 u32 s_flags; 484 struct qib_verbs_txreq *s_tx; 485 struct qib_swqe *s_wqe; 486 struct qib_sge_state s_sge; /* current send request data */ 487 struct qib_mregion *s_rdma_mr; 488 atomic_t s_dma_busy; 489 u32 s_cur_size; /* size of send packet in bytes */ 490 u32 s_len; /* total length of s_sge */ 491 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */ 492 u32 s_next_psn; /* PSN for next request */ 493 u32 s_last_psn; /* last response PSN processed */ 494 u32 s_sending_psn; /* lowest PSN that is being sent */ 495 u32 s_sending_hpsn; /* highest PSN that is being sent */ 496 u32 s_psn; /* current packet sequence number */ 497 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */ 498 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */ 499 u32 s_head; /* new entries added here */ 500 u32 s_tail; /* next entry to process */ 501 u32 s_cur; /* current work queue entry */ 502 u32 s_acked; /* last un-ACK'ed entry */ 503 u32 s_last; /* last completed entry */ 504 u32 s_ssn; /* SSN of tail entry */ 505 u32 s_lsn; /* limit sequence number (credit) */ 506 u16 s_hdrwords; /* size of s_hdr in 32 bit words */ 507 u16 s_rdma_ack_cnt; 508 u8 s_state; /* opcode of last packet sent */ 509 u8 s_ack_state; /* opcode of packet to ACK */ 510 u8 s_nak_state; /* non-zero if NAK is pending */ 511 u8 r_nak_state; /* non-zero if NAK is pending */ 512 u8 s_retry; /* requester retry counter */ 513 u8 s_rnr_retry; /* requester RNR retry counter */ 514 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */ 515 u8 s_tail_ack_queue; /* index into s_ack_queue[] */ 516 517 struct qib_sge_state s_ack_rdma_sge; 518 struct timer_list s_timer; 519 struct list_head iowait; /* link for wait PIO buf */ 520 521 struct work_struct s_work; 522 523 wait_queue_head_t wait_dma; 524 525 struct qib_sge r_sg_list[0] /* verified SGEs */ 526 ____cacheline_aligned_in_smp; 527 }; 528 529 /* 530 * Atomic bit definitions for r_aflags. 531 */ 532 #define QIB_R_WRID_VALID 0 533 #define QIB_R_REWIND_SGE 1 534 535 /* 536 * Bit definitions for r_flags. 537 */ 538 #define QIB_R_REUSE_SGE 0x01 539 #define QIB_R_RDMAR_SEQ 0x02 540 #define QIB_R_RSP_NAK 0x04 541 #define QIB_R_RSP_SEND 0x08 542 #define QIB_R_COMM_EST 0x10 543 544 /* 545 * Bit definitions for s_flags. 546 * 547 * QIB_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled 548 * QIB_S_BUSY - send tasklet is processing the QP 549 * QIB_S_TIMER - the RC retry timer is active 550 * QIB_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics 551 * QIB_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs 552 * before processing the next SWQE 553 * QIB_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete 554 * before processing the next SWQE 555 * QIB_S_WAIT_RNR - waiting for RNR timeout 556 * QIB_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE 557 * QIB_S_WAIT_DMA - waiting for send DMA queue to drain before generating 558 * next send completion entry not via send DMA 559 * QIB_S_WAIT_PIO - waiting for a send buffer to be available 560 * QIB_S_WAIT_TX - waiting for a struct qib_verbs_txreq to be available 561 * QIB_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available 562 * QIB_S_WAIT_KMEM - waiting for kernel memory to be available 563 * QIB_S_WAIT_PSN - waiting for a packet to exit the send DMA queue 564 * QIB_S_WAIT_ACK - waiting for an ACK packet before sending more requests 565 * QIB_S_SEND_ONE - send one packet, request ACK, then wait for ACK 566 */ 567 #define QIB_S_SIGNAL_REQ_WR 0x0001 568 #define QIB_S_BUSY 0x0002 569 #define QIB_S_TIMER 0x0004 570 #define QIB_S_RESP_PENDING 0x0008 571 #define QIB_S_ACK_PENDING 0x0010 572 #define QIB_S_WAIT_FENCE 0x0020 573 #define QIB_S_WAIT_RDMAR 0x0040 574 #define QIB_S_WAIT_RNR 0x0080 575 #define QIB_S_WAIT_SSN_CREDIT 0x0100 576 #define QIB_S_WAIT_DMA 0x0200 577 #define QIB_S_WAIT_PIO 0x0400 578 #define QIB_S_WAIT_TX 0x0800 579 #define QIB_S_WAIT_DMA_DESC 0x1000 580 #define QIB_S_WAIT_KMEM 0x2000 581 #define QIB_S_WAIT_PSN 0x4000 582 #define QIB_S_WAIT_ACK 0x8000 583 #define QIB_S_SEND_ONE 0x10000 584 #define QIB_S_UNLIMITED_CREDIT 0x20000 585 586 /* 587 * Wait flags that would prevent any packet type from being sent. 588 */ 589 #define QIB_S_ANY_WAIT_IO (QIB_S_WAIT_PIO | QIB_S_WAIT_TX | \ 590 QIB_S_WAIT_DMA_DESC | QIB_S_WAIT_KMEM) 591 592 /* 593 * Wait flags that would prevent send work requests from making progress. 594 */ 595 #define QIB_S_ANY_WAIT_SEND (QIB_S_WAIT_FENCE | QIB_S_WAIT_RDMAR | \ 596 QIB_S_WAIT_RNR | QIB_S_WAIT_SSN_CREDIT | QIB_S_WAIT_DMA | \ 597 QIB_S_WAIT_PSN | QIB_S_WAIT_ACK) 598 599 #define QIB_S_ANY_WAIT (QIB_S_ANY_WAIT_IO | QIB_S_ANY_WAIT_SEND) 600 601 #define QIB_PSN_CREDIT 16 602 603 /* 604 * Since struct qib_swqe is not a fixed size, we can't simply index into 605 * struct qib_qp.s_wq. This function does the array index computation. 606 */ 607 static inline struct qib_swqe *get_swqe_ptr(struct qib_qp *qp, 608 unsigned n) 609 { 610 return (struct qib_swqe *)((char *)qp->s_wq + 611 (sizeof(struct qib_swqe) + 612 qp->s_max_sge * 613 sizeof(struct qib_sge)) * n); 614 } 615 616 /* 617 * Since struct qib_rwqe is not a fixed size, we can't simply index into 618 * struct qib_rwq.wq. This function does the array index computation. 619 */ 620 static inline struct qib_rwqe *get_rwqe_ptr(struct qib_rq *rq, unsigned n) 621 { 622 return (struct qib_rwqe *) 623 ((char *) rq->wq->wq + 624 (sizeof(struct qib_rwqe) + 625 rq->max_sge * sizeof(struct ib_sge)) * n); 626 } 627 628 /* 629 * QPN-map pages start out as NULL, they get allocated upon 630 * first use and are never deallocated. This way, 631 * large bitmaps are not allocated unless large numbers of QPs are used. 632 */ 633 struct qpn_map { 634 void *page; 635 }; 636 637 struct qib_qpn_table { 638 spinlock_t lock; /* protect changes in this struct */ 639 unsigned flags; /* flags for QP0/1 allocated for each port */ 640 u32 last; /* last QP number allocated */ 641 u32 nmaps; /* size of the map table */ 642 u16 limit; 643 u16 mask; 644 /* bit map of free QP numbers other than 0/1 */ 645 struct qpn_map map[QPNMAP_ENTRIES]; 646 }; 647 648 struct qib_lkey_table { 649 spinlock_t lock; /* protect changes in this struct */ 650 u32 next; /* next unused index (speeds search) */ 651 u32 gen; /* generation count */ 652 u32 max; /* size of the table */ 653 struct qib_mregion __rcu **table; 654 }; 655 656 struct qib_opcode_stats { 657 u64 n_packets; /* number of packets */ 658 u64 n_bytes; /* total number of bytes */ 659 }; 660 661 struct qib_ibport { 662 struct qib_qp __rcu *qp0; 663 struct qib_qp __rcu *qp1; 664 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ 665 struct qib_ah *sm_ah; 666 struct qib_ah *smi_ah; 667 struct rb_root mcast_tree; 668 spinlock_t lock; /* protect changes in this struct */ 669 670 /* non-zero when timer is set */ 671 unsigned long mkey_lease_timeout; 672 unsigned long trap_timeout; 673 __be64 gid_prefix; /* in network order */ 674 __be64 mkey; 675 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */ 676 u64 tid; /* TID for traps */ 677 u64 n_unicast_xmit; /* total unicast packets sent */ 678 u64 n_unicast_rcv; /* total unicast packets received */ 679 u64 n_multicast_xmit; /* total multicast packets sent */ 680 u64 n_multicast_rcv; /* total multicast packets received */ 681 u64 z_symbol_error_counter; /* starting count for PMA */ 682 u64 z_link_error_recovery_counter; /* starting count for PMA */ 683 u64 z_link_downed_counter; /* starting count for PMA */ 684 u64 z_port_rcv_errors; /* starting count for PMA */ 685 u64 z_port_rcv_remphys_errors; /* starting count for PMA */ 686 u64 z_port_xmit_discards; /* starting count for PMA */ 687 u64 z_port_xmit_data; /* starting count for PMA */ 688 u64 z_port_rcv_data; /* starting count for PMA */ 689 u64 z_port_xmit_packets; /* starting count for PMA */ 690 u64 z_port_rcv_packets; /* starting count for PMA */ 691 u32 z_local_link_integrity_errors; /* starting count for PMA */ 692 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */ 693 u32 z_vl15_dropped; /* starting count for PMA */ 694 u32 n_rc_resends; 695 u32 n_rc_acks; 696 u32 n_rc_qacks; 697 u32 n_rc_delayed_comp; 698 u32 n_seq_naks; 699 u32 n_rdma_seq; 700 u32 n_rnr_naks; 701 u32 n_other_naks; 702 u32 n_loop_pkts; 703 u32 n_pkt_drops; 704 u32 n_vl15_dropped; 705 u32 n_rc_timeouts; 706 u32 n_dmawait; 707 u32 n_unaligned; 708 u32 n_rc_dupreq; 709 u32 n_rc_seqnak; 710 u32 port_cap_flags; 711 u32 pma_sample_start; 712 u32 pma_sample_interval; 713 __be16 pma_counter_select[5]; 714 u16 pma_tag; 715 u16 pkey_violations; 716 u16 qkey_violations; 717 u16 mkey_violations; 718 u16 mkey_lease_period; 719 u16 sm_lid; 720 u16 repress_traps; 721 u8 sm_sl; 722 u8 mkeyprot; 723 u8 subnet_timeout; 724 u8 vl_high_limit; 725 u8 sl_to_vl[16]; 726 727 struct qib_opcode_stats opstats[128]; 728 }; 729 730 731 struct qib_ibdev { 732 struct ib_device ibdev; 733 struct list_head pending_mmaps; 734 spinlock_t mmap_offset_lock; /* protect mmap_offset */ 735 u32 mmap_offset; 736 struct qib_mregion __rcu *dma_mr; 737 738 /* QP numbers are shared by all IB ports */ 739 struct qib_qpn_table qpn_table; 740 struct qib_lkey_table lk_table; 741 struct list_head piowait; /* list for wait PIO buf */ 742 struct list_head dmawait; /* list for wait DMA */ 743 struct list_head txwait; /* list for wait qib_verbs_txreq */ 744 struct list_head memwait; /* list for wait kernel memory */ 745 struct list_head txreq_free; 746 struct timer_list mem_timer; 747 struct qib_qp __rcu **qp_table; 748 struct qib_pio_header *pio_hdrs; 749 dma_addr_t pio_hdrs_phys; 750 /* list of QPs waiting for RNR timer */ 751 spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */ 752 u32 qp_table_size; /* size of the hash table */ 753 u32 qp_rnd; /* random bytes for hash */ 754 spinlock_t qpt_lock; 755 756 u32 n_piowait; 757 u32 n_txwait; 758 759 u32 n_pds_allocated; /* number of PDs allocated for device */ 760 spinlock_t n_pds_lock; 761 u32 n_ahs_allocated; /* number of AHs allocated for device */ 762 spinlock_t n_ahs_lock; 763 u32 n_cqs_allocated; /* number of CQs allocated for device */ 764 spinlock_t n_cqs_lock; 765 u32 n_qps_allocated; /* number of QPs allocated for device */ 766 spinlock_t n_qps_lock; 767 u32 n_srqs_allocated; /* number of SRQs allocated for device */ 768 spinlock_t n_srqs_lock; 769 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ 770 spinlock_t n_mcast_grps_lock; 771 }; 772 773 struct qib_verbs_counters { 774 u64 symbol_error_counter; 775 u64 link_error_recovery_counter; 776 u64 link_downed_counter; 777 u64 port_rcv_errors; 778 u64 port_rcv_remphys_errors; 779 u64 port_xmit_discards; 780 u64 port_xmit_data; 781 u64 port_rcv_data; 782 u64 port_xmit_packets; 783 u64 port_rcv_packets; 784 u32 local_link_integrity_errors; 785 u32 excessive_buffer_overrun_errors; 786 u32 vl15_dropped; 787 }; 788 789 static inline struct qib_mr *to_imr(struct ib_mr *ibmr) 790 { 791 return container_of(ibmr, struct qib_mr, ibmr); 792 } 793 794 static inline struct qib_pd *to_ipd(struct ib_pd *ibpd) 795 { 796 return container_of(ibpd, struct qib_pd, ibpd); 797 } 798 799 static inline struct qib_ah *to_iah(struct ib_ah *ibah) 800 { 801 return container_of(ibah, struct qib_ah, ibah); 802 } 803 804 static inline struct qib_cq *to_icq(struct ib_cq *ibcq) 805 { 806 return container_of(ibcq, struct qib_cq, ibcq); 807 } 808 809 static inline struct qib_srq *to_isrq(struct ib_srq *ibsrq) 810 { 811 return container_of(ibsrq, struct qib_srq, ibsrq); 812 } 813 814 static inline struct qib_qp *to_iqp(struct ib_qp *ibqp) 815 { 816 return container_of(ibqp, struct qib_qp, ibqp); 817 } 818 819 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev) 820 { 821 return container_of(ibdev, struct qib_ibdev, ibdev); 822 } 823 824 /* 825 * Send if not busy or waiting for I/O and either 826 * a RC response is pending or we can process send work requests. 827 */ 828 static inline int qib_send_ok(struct qib_qp *qp) 829 { 830 return !(qp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT_IO)) && 831 (qp->s_hdrwords || (qp->s_flags & QIB_S_RESP_PENDING) || 832 !(qp->s_flags & QIB_S_ANY_WAIT_SEND)); 833 } 834 835 extern struct workqueue_struct *qib_cq_wq; 836 837 /* 838 * This must be called with s_lock held. 839 */ 840 void qib_schedule_send(struct qib_qp *qp); 841 842 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2) 843 { 844 u16 p1 = pkey1 & 0x7FFF; 845 u16 p2 = pkey2 & 0x7FFF; 846 847 /* 848 * Low 15 bits must be non-zero and match, and 849 * one of the two must be a full member. 850 */ 851 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0); 852 } 853 854 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl, 855 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2); 856 void qib_cap_mask_chg(struct qib_ibport *ibp); 857 void qib_sys_guid_chg(struct qib_ibport *ibp); 858 void qib_node_desc_chg(struct qib_ibport *ibp); 859 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 860 struct ib_wc *in_wc, struct ib_grh *in_grh, 861 struct ib_mad *in_mad, struct ib_mad *out_mad); 862 int qib_create_agents(struct qib_ibdev *dev); 863 void qib_free_agents(struct qib_ibdev *dev); 864 865 /* 866 * Compare the lower 24 bits of the two values. 867 * Returns an integer <, ==, or > than zero. 868 */ 869 static inline int qib_cmp24(u32 a, u32 b) 870 { 871 return (((int) a) - ((int) b)) << 8; 872 } 873 874 struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid); 875 876 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, 877 u64 *rwords, u64 *spkts, u64 *rpkts, 878 u64 *xmit_wait); 879 880 int qib_get_counters(struct qib_pportdata *ppd, 881 struct qib_verbs_counters *cntrs); 882 883 int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); 884 885 int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); 886 887 int qib_mcast_tree_empty(struct qib_ibport *ibp); 888 889 __be32 qib_compute_aeth(struct qib_qp *qp); 890 891 struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn); 892 893 struct ib_qp *qib_create_qp(struct ib_pd *ibpd, 894 struct ib_qp_init_attr *init_attr, 895 struct ib_udata *udata); 896 897 int qib_destroy_qp(struct ib_qp *ibqp); 898 899 int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err); 900 901 int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 902 int attr_mask, struct ib_udata *udata); 903 904 int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 905 int attr_mask, struct ib_qp_init_attr *init_attr); 906 907 unsigned qib_free_all_qps(struct qib_devdata *dd); 908 909 void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt); 910 911 void qib_free_qpn_table(struct qib_qpn_table *qpt); 912 913 void qib_get_credit(struct qib_qp *qp, u32 aeth); 914 915 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult); 916 917 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail); 918 919 void qib_put_txreq(struct qib_verbs_txreq *tx); 920 921 int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr, 922 u32 hdrwords, struct qib_sge_state *ss, u32 len); 923 924 void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length, 925 int release); 926 927 void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release); 928 929 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 930 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 931 932 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, 933 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 934 935 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); 936 937 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid); 938 939 void qib_rc_rnr_retry(unsigned long arg); 940 941 void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr); 942 943 void qib_rc_error(struct qib_qp *qp, enum ib_wc_status err); 944 945 int qib_post_ud_send(struct qib_qp *qp, struct ib_send_wr *wr); 946 947 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 948 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 949 950 int qib_alloc_lkey(struct qib_mregion *mr, int dma_region); 951 952 void qib_free_lkey(struct qib_mregion *mr); 953 954 int qib_lkey_ok(struct qib_lkey_table *rkt, struct qib_pd *pd, 955 struct qib_sge *isge, struct ib_sge *sge, int acc); 956 957 int qib_rkey_ok(struct qib_qp *qp, struct qib_sge *sge, 958 u32 len, u64 vaddr, u32 rkey, int acc); 959 960 int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr, 961 struct ib_recv_wr **bad_wr); 962 963 struct ib_srq *qib_create_srq(struct ib_pd *ibpd, 964 struct ib_srq_init_attr *srq_init_attr, 965 struct ib_udata *udata); 966 967 int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 968 enum ib_srq_attr_mask attr_mask, 969 struct ib_udata *udata); 970 971 int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr); 972 973 int qib_destroy_srq(struct ib_srq *ibsrq); 974 975 void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig); 976 977 int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry); 978 979 struct ib_cq *qib_create_cq(struct ib_device *ibdev, int entries, 980 int comp_vector, struct ib_ucontext *context, 981 struct ib_udata *udata); 982 983 int qib_destroy_cq(struct ib_cq *ibcq); 984 985 int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags); 986 987 int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata); 988 989 struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc); 990 991 struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd, 992 struct ib_phys_buf *buffer_list, 993 int num_phys_buf, int acc, u64 *iova_start); 994 995 struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 996 u64 virt_addr, int mr_access_flags, 997 struct ib_udata *udata); 998 999 int qib_dereg_mr(struct ib_mr *ibmr); 1000 1001 struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len); 1002 1003 struct ib_fast_reg_page_list *qib_alloc_fast_reg_page_list( 1004 struct ib_device *ibdev, int page_list_len); 1005 1006 void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl); 1007 1008 int qib_fast_reg_mr(struct qib_qp *qp, struct ib_send_wr *wr); 1009 1010 struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags, 1011 struct ib_fmr_attr *fmr_attr); 1012 1013 int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, 1014 int list_len, u64 iova); 1015 1016 int qib_unmap_fmr(struct list_head *fmr_list); 1017 1018 int qib_dealloc_fmr(struct ib_fmr *ibfmr); 1019 1020 static inline void qib_get_mr(struct qib_mregion *mr) 1021 { 1022 atomic_inc(&mr->refcount); 1023 } 1024 1025 void mr_rcu_callback(struct rcu_head *list); 1026 1027 static inline void qib_put_mr(struct qib_mregion *mr) 1028 { 1029 if (unlikely(atomic_dec_and_test(&mr->refcount))) 1030 call_rcu(&mr->list, mr_rcu_callback); 1031 } 1032 1033 static inline void qib_put_ss(struct qib_sge_state *ss) 1034 { 1035 while (ss->num_sge) { 1036 qib_put_mr(ss->sge.mr); 1037 if (--ss->num_sge) 1038 ss->sge = *ss->sg_list++; 1039 } 1040 } 1041 1042 1043 void qib_release_mmap_info(struct kref *ref); 1044 1045 struct qib_mmap_info *qib_create_mmap_info(struct qib_ibdev *dev, u32 size, 1046 struct ib_ucontext *context, 1047 void *obj); 1048 1049 void qib_update_mmap_info(struct qib_ibdev *dev, struct qib_mmap_info *ip, 1050 u32 size, void *obj); 1051 1052 int qib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); 1053 1054 int qib_get_rwqe(struct qib_qp *qp, int wr_id_only); 1055 1056 void qib_migrate_qp(struct qib_qp *qp); 1057 1058 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr, 1059 int has_grh, struct qib_qp *qp, u32 bth0); 1060 1061 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr, 1062 struct ib_global_route *grh, u32 hwords, u32 nwords); 1063 1064 void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr, 1065 u32 bth0, u32 bth2); 1066 1067 void qib_do_send(struct work_struct *work); 1068 1069 void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe, 1070 enum ib_wc_status status); 1071 1072 void qib_send_rc_ack(struct qib_qp *qp); 1073 1074 int qib_make_rc_req(struct qib_qp *qp); 1075 1076 int qib_make_uc_req(struct qib_qp *qp); 1077 1078 int qib_make_ud_req(struct qib_qp *qp); 1079 1080 int qib_register_ib_device(struct qib_devdata *); 1081 1082 void qib_unregister_ib_device(struct qib_devdata *); 1083 1084 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32); 1085 1086 void qib_ib_piobufavail(struct qib_devdata *); 1087 1088 unsigned qib_get_npkeys(struct qib_devdata *); 1089 1090 unsigned qib_get_pkey(struct qib_ibport *, unsigned); 1091 1092 extern const enum ib_wc_opcode ib_qib_wc_opcode[]; 1093 1094 /* 1095 * Below HCA-independent IB PhysPortState values, returned 1096 * by the f_ibphys_portstate() routine. 1097 */ 1098 #define IB_PHYSPORTSTATE_SLEEP 1 1099 #define IB_PHYSPORTSTATE_POLL 2 1100 #define IB_PHYSPORTSTATE_DISABLED 3 1101 #define IB_PHYSPORTSTATE_CFG_TRAIN 4 1102 #define IB_PHYSPORTSTATE_LINKUP 5 1103 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6 1104 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8 1105 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB 1106 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC 1107 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE 1108 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF 1109 #define IB_PHYSPORTSTATE_CFG_ENH 0x10 1110 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13 1111 1112 extern const int ib_qib_state_ops[]; 1113 1114 extern __be64 ib_qib_sys_image_guid; /* in network order */ 1115 1116 extern unsigned int ib_qib_lkey_table_size; 1117 1118 extern unsigned int ib_qib_max_cqes; 1119 1120 extern unsigned int ib_qib_max_cqs; 1121 1122 extern unsigned int ib_qib_max_qp_wrs; 1123 1124 extern unsigned int ib_qib_max_qps; 1125 1126 extern unsigned int ib_qib_max_sges; 1127 1128 extern unsigned int ib_qib_max_mcast_grps; 1129 1130 extern unsigned int ib_qib_max_mcast_qp_attached; 1131 1132 extern unsigned int ib_qib_max_srqs; 1133 1134 extern unsigned int ib_qib_max_srq_sges; 1135 1136 extern unsigned int ib_qib_max_srq_wrs; 1137 1138 extern const u32 ib_qib_rnr_table[]; 1139 1140 extern struct ib_dma_mapping_ops qib_dma_mapping_ops; 1141 1142 #endif /* QIB_VERBS_H */ 1143