1 /* 2 * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation. 3 * 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 <rdma/ib_pack.h> 45 #include <rdma/ib_user_verbs.h> 46 47 struct qib_ctxtdata; 48 struct qib_pportdata; 49 struct qib_devdata; 50 struct qib_verbs_txreq; 51 52 #define QIB_MAX_RDMA_ATOMIC 16 53 #define QIB_GUIDS_PER_PORT 5 54 55 #define QPN_MAX (1 << 24) 56 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE) 57 58 /* 59 * Increment this value if any changes that break userspace ABI 60 * compatibility are made. 61 */ 62 #define QIB_UVERBS_ABI_VERSION 2 63 64 /* 65 * Define an ib_cq_notify value that is not valid so we know when CQ 66 * notifications are armed. 67 */ 68 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1) 69 70 #define IB_SEQ_NAK (3 << 29) 71 72 /* AETH NAK opcode values */ 73 #define IB_RNR_NAK 0x20 74 #define IB_NAK_PSN_ERROR 0x60 75 #define IB_NAK_INVALID_REQUEST 0x61 76 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 77 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 78 #define IB_NAK_INVALID_RD_REQUEST 0x64 79 80 /* Flags for checking QP state (see ib_qib_state_ops[]) */ 81 #define QIB_POST_SEND_OK 0x01 82 #define QIB_POST_RECV_OK 0x02 83 #define QIB_PROCESS_RECV_OK 0x04 84 #define QIB_PROCESS_SEND_OK 0x08 85 #define QIB_PROCESS_NEXT_SEND_OK 0x10 86 #define QIB_FLUSH_SEND 0x20 87 #define QIB_FLUSH_RECV 0x40 88 #define QIB_PROCESS_OR_FLUSH_SEND \ 89 (QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND) 90 91 /* IB Performance Manager status values */ 92 #define IB_PMA_SAMPLE_STATUS_DONE 0x00 93 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 94 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 95 96 /* Mandatory IB performance counter select values. */ 97 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) 98 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) 99 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) 100 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) 101 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) 102 103 #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0) 104 105 #define IB_BTH_REQ_ACK (1 << 31) 106 #define IB_BTH_SOLICITED (1 << 23) 107 #define IB_BTH_MIG_REQ (1 << 22) 108 109 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */ 110 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26) 111 112 #define IB_GRH_VERSION 6 113 #define IB_GRH_VERSION_MASK 0xF 114 #define IB_GRH_VERSION_SHIFT 28 115 #define IB_GRH_TCLASS_MASK 0xFF 116 #define IB_GRH_TCLASS_SHIFT 20 117 #define IB_GRH_FLOW_MASK 0xFFFFF 118 #define IB_GRH_FLOW_SHIFT 0 119 #define IB_GRH_NEXT_HDR 0x1B 120 121 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) 122 123 /* Values for set/get portinfo VLCap OperationalVLs */ 124 #define IB_VL_VL0 1 125 #define IB_VL_VL0_1 2 126 #define IB_VL_VL0_3 3 127 #define IB_VL_VL0_7 4 128 #define IB_VL_VL0_14 5 129 130 static inline int qib_num_vls(int vls) 131 { 132 switch (vls) { 133 default: 134 case IB_VL_VL0: 135 return 1; 136 case IB_VL_VL0_1: 137 return 2; 138 case IB_VL_VL0_3: 139 return 4; 140 case IB_VL_VL0_7: 141 return 8; 142 case IB_VL_VL0_14: 143 return 15; 144 } 145 } 146 147 struct ib_reth { 148 __be64 vaddr; 149 __be32 rkey; 150 __be32 length; 151 } __attribute__ ((packed)); 152 153 struct ib_atomic_eth { 154 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */ 155 __be32 rkey; 156 __be64 swap_data; 157 __be64 compare_data; 158 } __attribute__ ((packed)); 159 160 struct qib_other_headers { 161 __be32 bth[3]; 162 union { 163 struct { 164 __be32 deth[2]; 165 __be32 imm_data; 166 } ud; 167 struct { 168 struct ib_reth reth; 169 __be32 imm_data; 170 } rc; 171 struct { 172 __be32 aeth; 173 __be32 atomic_ack_eth[2]; 174 } at; 175 __be32 imm_data; 176 __be32 aeth; 177 struct ib_atomic_eth atomic_eth; 178 } u; 179 } __attribute__ ((packed)); 180 181 /* 182 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes 183 * long (72 w/ imm_data). Only the first 56 bytes of the IB header 184 * will be in the eager header buffer. The remaining 12 or 16 bytes 185 * are in the data buffer. 186 */ 187 struct qib_ib_header { 188 __be16 lrh[4]; 189 union { 190 struct { 191 struct ib_grh grh; 192 struct qib_other_headers oth; 193 } l; 194 struct qib_other_headers oth; 195 } u; 196 } __attribute__ ((packed)); 197 198 struct qib_pio_header { 199 __le32 pbc[2]; 200 struct qib_ib_header hdr; 201 } __attribute__ ((packed)); 202 203 /* 204 * There is one struct qib_mcast for each multicast GID. 205 * All attached QPs are then stored as a list of 206 * struct qib_mcast_qp. 207 */ 208 struct qib_mcast_qp { 209 struct list_head list; 210 struct qib_qp *qp; 211 }; 212 213 struct qib_mcast { 214 struct rb_node rb_node; 215 union ib_gid mgid; 216 struct list_head qp_list; 217 wait_queue_head_t wait; 218 atomic_t refcount; 219 int n_attached; 220 }; 221 222 /* Protection domain */ 223 struct qib_pd { 224 struct ib_pd ibpd; 225 int user; /* non-zero if created from user space */ 226 }; 227 228 /* Address Handle */ 229 struct qib_ah { 230 struct ib_ah ibah; 231 struct ib_ah_attr attr; 232 atomic_t refcount; 233 }; 234 235 /* 236 * This structure is used by qib_mmap() to validate an offset 237 * when an mmap() request is made. The vm_area_struct then uses 238 * this as its vm_private_data. 239 */ 240 struct qib_mmap_info { 241 struct list_head pending_mmaps; 242 struct ib_ucontext *context; 243 void *obj; 244 __u64 offset; 245 struct kref ref; 246 unsigned size; 247 }; 248 249 /* 250 * This structure is used to contain the head pointer, tail pointer, 251 * and completion queue entries as a single memory allocation so 252 * it can be mmap'ed into user space. 253 */ 254 struct qib_cq_wc { 255 u32 head; /* index of next entry to fill */ 256 u32 tail; /* index of next ib_poll_cq() entry */ 257 union { 258 /* these are actually size ibcq.cqe + 1 */ 259 struct ib_uverbs_wc uqueue[0]; 260 struct ib_wc kqueue[0]; 261 }; 262 }; 263 264 /* 265 * The completion queue structure. 266 */ 267 struct qib_cq { 268 struct ib_cq ibcq; 269 struct work_struct comptask; 270 spinlock_t lock; /* protect changes in this struct */ 271 u8 notify; 272 u8 triggered; 273 struct qib_cq_wc *queue; 274 struct qib_mmap_info *ip; 275 }; 276 277 /* 278 * A segment is a linear region of low physical memory. 279 * XXX Maybe we should use phys addr here and kmap()/kunmap(). 280 * Used by the verbs layer. 281 */ 282 struct qib_seg { 283 void *vaddr; 284 size_t length; 285 }; 286 287 /* The number of qib_segs that fit in a page. */ 288 #define QIB_SEGSZ (PAGE_SIZE / sizeof(struct qib_seg)) 289 290 struct qib_segarray { 291 struct qib_seg segs[QIB_SEGSZ]; 292 }; 293 294 struct qib_mregion { 295 struct ib_pd *pd; /* shares refcnt of ibmr.pd */ 296 u64 user_base; /* User's address for this region */ 297 u64 iova; /* IB start address of this region */ 298 size_t length; 299 u32 lkey; 300 u32 offset; /* offset (bytes) to start of region */ 301 int access_flags; 302 u32 max_segs; /* number of qib_segs in all the arrays */ 303 u32 mapsz; /* size of the map array */ 304 u8 page_shift; /* 0 - non unform/non powerof2 sizes */ 305 atomic_t refcount; 306 struct qib_segarray *map[0]; /* the segments */ 307 }; 308 309 /* 310 * These keep track of the copy progress within a memory region. 311 * Used by the verbs layer. 312 */ 313 struct qib_sge { 314 struct qib_mregion *mr; 315 void *vaddr; /* kernel virtual address of segment */ 316 u32 sge_length; /* length of the SGE */ 317 u32 length; /* remaining length of the segment */ 318 u16 m; /* current index: mr->map[m] */ 319 u16 n; /* current index: mr->map[m]->segs[n] */ 320 }; 321 322 /* Memory region */ 323 struct qib_mr { 324 struct ib_mr ibmr; 325 struct ib_umem *umem; 326 struct qib_mregion mr; /* must be last */ 327 }; 328 329 /* 330 * Send work request queue entry. 331 * The size of the sg_list is determined when the QP is created and stored 332 * in qp->s_max_sge. 333 */ 334 struct qib_swqe { 335 struct ib_send_wr wr; /* don't use wr.sg_list */ 336 u32 psn; /* first packet sequence number */ 337 u32 lpsn; /* last packet sequence number */ 338 u32 ssn; /* send sequence number */ 339 u32 length; /* total length of data in sg_list */ 340 struct qib_sge sg_list[0]; 341 }; 342 343 /* 344 * Receive work request queue entry. 345 * The size of the sg_list is determined when the QP (or SRQ) is created 346 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge). 347 */ 348 struct qib_rwqe { 349 u64 wr_id; 350 u8 num_sge; 351 struct ib_sge sg_list[0]; 352 }; 353 354 /* 355 * This structure is used to contain the head pointer, tail pointer, 356 * and receive work queue entries as a single memory allocation so 357 * it can be mmap'ed into user space. 358 * Note that the wq array elements are variable size so you can't 359 * just index into the array to get the N'th element; 360 * use get_rwqe_ptr() instead. 361 */ 362 struct qib_rwq { 363 u32 head; /* new work requests posted to the head */ 364 u32 tail; /* receives pull requests from here. */ 365 struct qib_rwqe wq[0]; 366 }; 367 368 struct qib_rq { 369 struct qib_rwq *wq; 370 spinlock_t lock; /* protect changes in this struct */ 371 u32 size; /* size of RWQE array */ 372 u8 max_sge; 373 }; 374 375 struct qib_srq { 376 struct ib_srq ibsrq; 377 struct qib_rq rq; 378 struct qib_mmap_info *ip; 379 /* send signal when number of RWQEs < limit */ 380 u32 limit; 381 }; 382 383 struct qib_sge_state { 384 struct qib_sge *sg_list; /* next SGE to be used if any */ 385 struct qib_sge sge; /* progress state for the current SGE */ 386 u32 total_len; 387 u8 num_sge; 388 }; 389 390 /* 391 * This structure holds the information that the send tasklet needs 392 * to send a RDMA read response or atomic operation. 393 */ 394 struct qib_ack_entry { 395 u8 opcode; 396 u8 sent; 397 u32 psn; 398 u32 lpsn; 399 union { 400 struct qib_sge rdma_sge; 401 u64 atomic_data; 402 }; 403 }; 404 405 /* 406 * Variables prefixed with s_ are for the requester (sender). 407 * Variables prefixed with r_ are for the responder (receiver). 408 * Variables prefixed with ack_ are for responder replies. 409 * 410 * Common variables are protected by both r_rq.lock and s_lock in that order 411 * which only happens in modify_qp() or changing the QP 'state'. 412 */ 413 struct qib_qp { 414 struct ib_qp ibqp; 415 struct qib_qp *next; /* link list for QPN hash table */ 416 struct qib_qp *timer_next; /* link list for qib_ib_timer() */ 417 struct list_head iowait; /* link for wait PIO buf */ 418 struct list_head rspwait; /* link for waititing to respond */ 419 struct ib_ah_attr remote_ah_attr; 420 struct ib_ah_attr alt_ah_attr; 421 struct qib_ib_header s_hdr; /* next packet header to send */ 422 atomic_t refcount; 423 wait_queue_head_t wait; 424 wait_queue_head_t wait_dma; 425 struct timer_list s_timer; 426 struct work_struct s_work; 427 struct qib_mmap_info *ip; 428 struct qib_sge_state *s_cur_sge; 429 struct qib_verbs_txreq *s_tx; 430 struct qib_mregion *s_rdma_mr; 431 struct qib_sge_state s_sge; /* current send request data */ 432 struct qib_ack_entry s_ack_queue[QIB_MAX_RDMA_ATOMIC + 1]; 433 struct qib_sge_state s_ack_rdma_sge; 434 struct qib_sge_state s_rdma_read_sge; 435 struct qib_sge_state r_sge; /* current receive data */ 436 spinlock_t r_lock; /* used for APM */ 437 spinlock_t s_lock; 438 atomic_t s_dma_busy; 439 u32 s_flags; 440 u32 s_cur_size; /* size of send packet in bytes */ 441 u32 s_len; /* total length of s_sge */ 442 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */ 443 u32 s_next_psn; /* PSN for next request */ 444 u32 s_last_psn; /* last response PSN processed */ 445 u32 s_sending_psn; /* lowest PSN that is being sent */ 446 u32 s_sending_hpsn; /* highest PSN that is being sent */ 447 u32 s_psn; /* current packet sequence number */ 448 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */ 449 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */ 450 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */ 451 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */ 452 u64 r_wr_id; /* ID for current receive WQE */ 453 unsigned long r_aflags; 454 u32 r_len; /* total length of r_sge */ 455 u32 r_rcv_len; /* receive data len processed */ 456 u32 r_psn; /* expected rcv packet sequence number */ 457 u32 r_msn; /* message sequence number */ 458 u16 s_hdrwords; /* size of s_hdr in 32 bit words */ 459 u16 s_rdma_ack_cnt; 460 u8 state; /* QP state */ 461 u8 s_state; /* opcode of last packet sent */ 462 u8 s_ack_state; /* opcode of packet to ACK */ 463 u8 s_nak_state; /* non-zero if NAK is pending */ 464 u8 r_state; /* opcode of last packet received */ 465 u8 r_nak_state; /* non-zero if NAK is pending */ 466 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */ 467 u8 r_flags; 468 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */ 469 u8 r_head_ack_queue; /* index into s_ack_queue[] */ 470 u8 qp_access_flags; 471 u8 s_max_sge; /* size of s_wq->sg_list */ 472 u8 s_retry_cnt; /* number of times to retry */ 473 u8 s_rnr_retry_cnt; 474 u8 s_retry; /* requester retry counter */ 475 u8 s_rnr_retry; /* requester RNR retry counter */ 476 u8 s_pkey_index; /* PKEY index to use */ 477 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */ 478 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */ 479 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */ 480 u8 s_tail_ack_queue; /* index into s_ack_queue[] */ 481 u8 s_srate; 482 u8 s_draining; 483 u8 s_mig_state; 484 u8 timeout; /* Timeout for this QP */ 485 u8 alt_timeout; /* Alternate path timeout for this QP */ 486 u8 port_num; 487 enum ib_mtu path_mtu; 488 u32 pmtu; /* decoded from path_mtu */ 489 u32 remote_qpn; 490 u32 qkey; /* QKEY for this QP (for UD or RD) */ 491 u32 s_size; /* send work queue size */ 492 u32 s_head; /* new entries added here */ 493 u32 s_tail; /* next entry to process */ 494 u32 s_cur; /* current work queue entry */ 495 u32 s_acked; /* last un-ACK'ed entry */ 496 u32 s_last; /* last completed entry */ 497 u32 s_ssn; /* SSN of tail entry */ 498 u32 s_lsn; /* limit sequence number (credit) */ 499 unsigned long timeout_jiffies; /* computed from timeout */ 500 struct qib_swqe *s_wq; /* send work queue */ 501 struct qib_swqe *s_wqe; 502 struct qib_rq r_rq; /* receive work queue */ 503 struct qib_sge r_sg_list[0]; /* verified SGEs */ 504 }; 505 506 /* 507 * Atomic bit definitions for r_aflags. 508 */ 509 #define QIB_R_WRID_VALID 0 510 #define QIB_R_REWIND_SGE 1 511 512 /* 513 * Bit definitions for r_flags. 514 */ 515 #define QIB_R_REUSE_SGE 0x01 516 #define QIB_R_RDMAR_SEQ 0x02 517 #define QIB_R_RSP_NAK 0x04 518 #define QIB_R_RSP_SEND 0x08 519 #define QIB_R_COMM_EST 0x10 520 521 /* 522 * Bit definitions for s_flags. 523 * 524 * QIB_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled 525 * QIB_S_BUSY - send tasklet is processing the QP 526 * QIB_S_TIMER - the RC retry timer is active 527 * QIB_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics 528 * QIB_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs 529 * before processing the next SWQE 530 * QIB_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete 531 * before processing the next SWQE 532 * QIB_S_WAIT_RNR - waiting for RNR timeout 533 * QIB_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE 534 * QIB_S_WAIT_DMA - waiting for send DMA queue to drain before generating 535 * next send completion entry not via send DMA 536 * QIB_S_WAIT_PIO - waiting for a send buffer to be available 537 * QIB_S_WAIT_TX - waiting for a struct qib_verbs_txreq to be available 538 * QIB_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available 539 * QIB_S_WAIT_KMEM - waiting for kernel memory to be available 540 * QIB_S_WAIT_PSN - waiting for a packet to exit the send DMA queue 541 * QIB_S_WAIT_ACK - waiting for an ACK packet before sending more requests 542 * QIB_S_SEND_ONE - send one packet, request ACK, then wait for ACK 543 */ 544 #define QIB_S_SIGNAL_REQ_WR 0x0001 545 #define QIB_S_BUSY 0x0002 546 #define QIB_S_TIMER 0x0004 547 #define QIB_S_RESP_PENDING 0x0008 548 #define QIB_S_ACK_PENDING 0x0010 549 #define QIB_S_WAIT_FENCE 0x0020 550 #define QIB_S_WAIT_RDMAR 0x0040 551 #define QIB_S_WAIT_RNR 0x0080 552 #define QIB_S_WAIT_SSN_CREDIT 0x0100 553 #define QIB_S_WAIT_DMA 0x0200 554 #define QIB_S_WAIT_PIO 0x0400 555 #define QIB_S_WAIT_TX 0x0800 556 #define QIB_S_WAIT_DMA_DESC 0x1000 557 #define QIB_S_WAIT_KMEM 0x2000 558 #define QIB_S_WAIT_PSN 0x4000 559 #define QIB_S_WAIT_ACK 0x8000 560 #define QIB_S_SEND_ONE 0x10000 561 #define QIB_S_UNLIMITED_CREDIT 0x20000 562 563 /* 564 * Wait flags that would prevent any packet type from being sent. 565 */ 566 #define QIB_S_ANY_WAIT_IO (QIB_S_WAIT_PIO | QIB_S_WAIT_TX | \ 567 QIB_S_WAIT_DMA_DESC | QIB_S_WAIT_KMEM) 568 569 /* 570 * Wait flags that would prevent send work requests from making progress. 571 */ 572 #define QIB_S_ANY_WAIT_SEND (QIB_S_WAIT_FENCE | QIB_S_WAIT_RDMAR | \ 573 QIB_S_WAIT_RNR | QIB_S_WAIT_SSN_CREDIT | QIB_S_WAIT_DMA | \ 574 QIB_S_WAIT_PSN | QIB_S_WAIT_ACK) 575 576 #define QIB_S_ANY_WAIT (QIB_S_ANY_WAIT_IO | QIB_S_ANY_WAIT_SEND) 577 578 #define QIB_PSN_CREDIT 16 579 580 /* 581 * Since struct qib_swqe is not a fixed size, we can't simply index into 582 * struct qib_qp.s_wq. This function does the array index computation. 583 */ 584 static inline struct qib_swqe *get_swqe_ptr(struct qib_qp *qp, 585 unsigned n) 586 { 587 return (struct qib_swqe *)((char *)qp->s_wq + 588 (sizeof(struct qib_swqe) + 589 qp->s_max_sge * 590 sizeof(struct qib_sge)) * n); 591 } 592 593 /* 594 * Since struct qib_rwqe is not a fixed size, we can't simply index into 595 * struct qib_rwq.wq. This function does the array index computation. 596 */ 597 static inline struct qib_rwqe *get_rwqe_ptr(struct qib_rq *rq, unsigned n) 598 { 599 return (struct qib_rwqe *) 600 ((char *) rq->wq->wq + 601 (sizeof(struct qib_rwqe) + 602 rq->max_sge * sizeof(struct ib_sge)) * n); 603 } 604 605 /* 606 * QPN-map pages start out as NULL, they get allocated upon 607 * first use and are never deallocated. This way, 608 * large bitmaps are not allocated unless large numbers of QPs are used. 609 */ 610 struct qpn_map { 611 void *page; 612 }; 613 614 struct qib_qpn_table { 615 spinlock_t lock; /* protect changes in this struct */ 616 unsigned flags; /* flags for QP0/1 allocated for each port */ 617 u32 last; /* last QP number allocated */ 618 u32 nmaps; /* size of the map table */ 619 u16 limit; 620 u16 mask; 621 /* bit map of free QP numbers other than 0/1 */ 622 struct qpn_map map[QPNMAP_ENTRIES]; 623 }; 624 625 struct qib_lkey_table { 626 spinlock_t lock; /* protect changes in this struct */ 627 u32 next; /* next unused index (speeds search) */ 628 u32 gen; /* generation count */ 629 u32 max; /* size of the table */ 630 struct qib_mregion **table; 631 }; 632 633 struct qib_opcode_stats { 634 u64 n_packets; /* number of packets */ 635 u64 n_bytes; /* total number of bytes */ 636 }; 637 638 struct qib_ibport { 639 struct qib_qp *qp0; 640 struct qib_qp *qp1; 641 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ 642 struct qib_ah *sm_ah; 643 struct qib_ah *smi_ah; 644 struct rb_root mcast_tree; 645 spinlock_t lock; /* protect changes in this struct */ 646 647 /* non-zero when timer is set */ 648 unsigned long mkey_lease_timeout; 649 unsigned long trap_timeout; 650 __be64 gid_prefix; /* in network order */ 651 __be64 mkey; 652 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */ 653 u64 tid; /* TID for traps */ 654 u64 n_unicast_xmit; /* total unicast packets sent */ 655 u64 n_unicast_rcv; /* total unicast packets received */ 656 u64 n_multicast_xmit; /* total multicast packets sent */ 657 u64 n_multicast_rcv; /* total multicast packets received */ 658 u64 z_symbol_error_counter; /* starting count for PMA */ 659 u64 z_link_error_recovery_counter; /* starting count for PMA */ 660 u64 z_link_downed_counter; /* starting count for PMA */ 661 u64 z_port_rcv_errors; /* starting count for PMA */ 662 u64 z_port_rcv_remphys_errors; /* starting count for PMA */ 663 u64 z_port_xmit_discards; /* starting count for PMA */ 664 u64 z_port_xmit_data; /* starting count for PMA */ 665 u64 z_port_rcv_data; /* starting count for PMA */ 666 u64 z_port_xmit_packets; /* starting count for PMA */ 667 u64 z_port_rcv_packets; /* starting count for PMA */ 668 u32 z_local_link_integrity_errors; /* starting count for PMA */ 669 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */ 670 u32 z_vl15_dropped; /* starting count for PMA */ 671 u32 n_rc_resends; 672 u32 n_rc_acks; 673 u32 n_rc_qacks; 674 u32 n_rc_delayed_comp; 675 u32 n_seq_naks; 676 u32 n_rdma_seq; 677 u32 n_rnr_naks; 678 u32 n_other_naks; 679 u32 n_loop_pkts; 680 u32 n_pkt_drops; 681 u32 n_vl15_dropped; 682 u32 n_rc_timeouts; 683 u32 n_dmawait; 684 u32 n_unaligned; 685 u32 n_rc_dupreq; 686 u32 n_rc_seqnak; 687 u32 port_cap_flags; 688 u32 pma_sample_start; 689 u32 pma_sample_interval; 690 __be16 pma_counter_select[5]; 691 u16 pma_tag; 692 u16 pkey_violations; 693 u16 qkey_violations; 694 u16 mkey_violations; 695 u16 mkey_lease_period; 696 u16 sm_lid; 697 u16 repress_traps; 698 u8 sm_sl; 699 u8 mkeyprot; 700 u8 subnet_timeout; 701 u8 vl_high_limit; 702 u8 sl_to_vl[16]; 703 704 struct qib_opcode_stats opstats[128]; 705 }; 706 707 struct qib_ibdev { 708 struct ib_device ibdev; 709 struct list_head pending_mmaps; 710 spinlock_t mmap_offset_lock; /* protect mmap_offset */ 711 u32 mmap_offset; 712 struct qib_mregion *dma_mr; 713 714 /* QP numbers are shared by all IB ports */ 715 struct qib_qpn_table qpn_table; 716 struct qib_lkey_table lk_table; 717 struct list_head piowait; /* list for wait PIO buf */ 718 struct list_head dmawait; /* list for wait DMA */ 719 struct list_head txwait; /* list for wait qib_verbs_txreq */ 720 struct list_head memwait; /* list for wait kernel memory */ 721 struct list_head txreq_free; 722 struct timer_list mem_timer; 723 struct qib_qp **qp_table; 724 struct qib_pio_header *pio_hdrs; 725 dma_addr_t pio_hdrs_phys; 726 /* list of QPs waiting for RNR timer */ 727 spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */ 728 u32 qp_table_size; /* size of the hash table */ 729 u32 qp_rnd; /* random bytes for hash */ 730 spinlock_t qpt_lock; 731 732 u32 n_piowait; 733 u32 n_txwait; 734 735 u32 n_pds_allocated; /* number of PDs allocated for device */ 736 spinlock_t n_pds_lock; 737 u32 n_ahs_allocated; /* number of AHs allocated for device */ 738 spinlock_t n_ahs_lock; 739 u32 n_cqs_allocated; /* number of CQs allocated for device */ 740 spinlock_t n_cqs_lock; 741 u32 n_qps_allocated; /* number of QPs allocated for device */ 742 spinlock_t n_qps_lock; 743 u32 n_srqs_allocated; /* number of SRQs allocated for device */ 744 spinlock_t n_srqs_lock; 745 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ 746 spinlock_t n_mcast_grps_lock; 747 }; 748 749 struct qib_verbs_counters { 750 u64 symbol_error_counter; 751 u64 link_error_recovery_counter; 752 u64 link_downed_counter; 753 u64 port_rcv_errors; 754 u64 port_rcv_remphys_errors; 755 u64 port_xmit_discards; 756 u64 port_xmit_data; 757 u64 port_rcv_data; 758 u64 port_xmit_packets; 759 u64 port_rcv_packets; 760 u32 local_link_integrity_errors; 761 u32 excessive_buffer_overrun_errors; 762 u32 vl15_dropped; 763 }; 764 765 static inline struct qib_mr *to_imr(struct ib_mr *ibmr) 766 { 767 return container_of(ibmr, struct qib_mr, ibmr); 768 } 769 770 static inline struct qib_pd *to_ipd(struct ib_pd *ibpd) 771 { 772 return container_of(ibpd, struct qib_pd, ibpd); 773 } 774 775 static inline struct qib_ah *to_iah(struct ib_ah *ibah) 776 { 777 return container_of(ibah, struct qib_ah, ibah); 778 } 779 780 static inline struct qib_cq *to_icq(struct ib_cq *ibcq) 781 { 782 return container_of(ibcq, struct qib_cq, ibcq); 783 } 784 785 static inline struct qib_srq *to_isrq(struct ib_srq *ibsrq) 786 { 787 return container_of(ibsrq, struct qib_srq, ibsrq); 788 } 789 790 static inline struct qib_qp *to_iqp(struct ib_qp *ibqp) 791 { 792 return container_of(ibqp, struct qib_qp, ibqp); 793 } 794 795 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev) 796 { 797 return container_of(ibdev, struct qib_ibdev, ibdev); 798 } 799 800 /* 801 * Send if not busy or waiting for I/O and either 802 * a RC response is pending or we can process send work requests. 803 */ 804 static inline int qib_send_ok(struct qib_qp *qp) 805 { 806 return !(qp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT_IO)) && 807 (qp->s_hdrwords || (qp->s_flags & QIB_S_RESP_PENDING) || 808 !(qp->s_flags & QIB_S_ANY_WAIT_SEND)); 809 } 810 811 extern struct workqueue_struct *qib_cq_wq; 812 813 /* 814 * This must be called with s_lock held. 815 */ 816 static inline void qib_schedule_send(struct qib_qp *qp) 817 { 818 if (qib_send_ok(qp)) 819 queue_work(ib_wq, &qp->s_work); 820 } 821 822 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2) 823 { 824 u16 p1 = pkey1 & 0x7FFF; 825 u16 p2 = pkey2 & 0x7FFF; 826 827 /* 828 * Low 15 bits must be non-zero and match, and 829 * one of the two must be a full member. 830 */ 831 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0); 832 } 833 834 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl, 835 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2); 836 void qib_cap_mask_chg(struct qib_ibport *ibp); 837 void qib_sys_guid_chg(struct qib_ibport *ibp); 838 void qib_node_desc_chg(struct qib_ibport *ibp); 839 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 840 struct ib_wc *in_wc, struct ib_grh *in_grh, 841 struct ib_mad *in_mad, struct ib_mad *out_mad); 842 int qib_create_agents(struct qib_ibdev *dev); 843 void qib_free_agents(struct qib_ibdev *dev); 844 845 /* 846 * Compare the lower 24 bits of the two values. 847 * Returns an integer <, ==, or > than zero. 848 */ 849 static inline int qib_cmp24(u32 a, u32 b) 850 { 851 return (((int) a) - ((int) b)) << 8; 852 } 853 854 struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid); 855 856 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, 857 u64 *rwords, u64 *spkts, u64 *rpkts, 858 u64 *xmit_wait); 859 860 int qib_get_counters(struct qib_pportdata *ppd, 861 struct qib_verbs_counters *cntrs); 862 863 int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); 864 865 int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); 866 867 int qib_mcast_tree_empty(struct qib_ibport *ibp); 868 869 __be32 qib_compute_aeth(struct qib_qp *qp); 870 871 struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn); 872 873 struct ib_qp *qib_create_qp(struct ib_pd *ibpd, 874 struct ib_qp_init_attr *init_attr, 875 struct ib_udata *udata); 876 877 int qib_destroy_qp(struct ib_qp *ibqp); 878 879 int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err); 880 881 int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 882 int attr_mask, struct ib_udata *udata); 883 884 int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 885 int attr_mask, struct ib_qp_init_attr *init_attr); 886 887 unsigned qib_free_all_qps(struct qib_devdata *dd); 888 889 void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt); 890 891 void qib_free_qpn_table(struct qib_qpn_table *qpt); 892 893 void qib_get_credit(struct qib_qp *qp, u32 aeth); 894 895 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult); 896 897 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail); 898 899 void qib_put_txreq(struct qib_verbs_txreq *tx); 900 901 int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr, 902 u32 hdrwords, struct qib_sge_state *ss, u32 len); 903 904 void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length, 905 int release); 906 907 void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release); 908 909 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 910 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 911 912 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, 913 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 914 915 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); 916 917 void qib_rc_rnr_retry(unsigned long arg); 918 919 void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr); 920 921 void qib_rc_error(struct qib_qp *qp, enum ib_wc_status err); 922 923 int qib_post_ud_send(struct qib_qp *qp, struct ib_send_wr *wr); 924 925 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, 926 int has_grh, void *data, u32 tlen, struct qib_qp *qp); 927 928 int qib_alloc_lkey(struct qib_lkey_table *rkt, struct qib_mregion *mr); 929 930 int qib_free_lkey(struct qib_ibdev *dev, struct qib_mregion *mr); 931 932 int qib_lkey_ok(struct qib_lkey_table *rkt, struct qib_pd *pd, 933 struct qib_sge *isge, struct ib_sge *sge, int acc); 934 935 int qib_rkey_ok(struct qib_qp *qp, struct qib_sge *sge, 936 u32 len, u64 vaddr, u32 rkey, int acc); 937 938 int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr, 939 struct ib_recv_wr **bad_wr); 940 941 struct ib_srq *qib_create_srq(struct ib_pd *ibpd, 942 struct ib_srq_init_attr *srq_init_attr, 943 struct ib_udata *udata); 944 945 int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 946 enum ib_srq_attr_mask attr_mask, 947 struct ib_udata *udata); 948 949 int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr); 950 951 int qib_destroy_srq(struct ib_srq *ibsrq); 952 953 void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig); 954 955 int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry); 956 957 struct ib_cq *qib_create_cq(struct ib_device *ibdev, int entries, 958 int comp_vector, struct ib_ucontext *context, 959 struct ib_udata *udata); 960 961 int qib_destroy_cq(struct ib_cq *ibcq); 962 963 int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags); 964 965 int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata); 966 967 struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc); 968 969 struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd, 970 struct ib_phys_buf *buffer_list, 971 int num_phys_buf, int acc, u64 *iova_start); 972 973 struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 974 u64 virt_addr, int mr_access_flags, 975 struct ib_udata *udata); 976 977 int qib_dereg_mr(struct ib_mr *ibmr); 978 979 struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len); 980 981 struct ib_fast_reg_page_list *qib_alloc_fast_reg_page_list( 982 struct ib_device *ibdev, int page_list_len); 983 984 void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl); 985 986 int qib_fast_reg_mr(struct qib_qp *qp, struct ib_send_wr *wr); 987 988 struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags, 989 struct ib_fmr_attr *fmr_attr); 990 991 int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, 992 int list_len, u64 iova); 993 994 int qib_unmap_fmr(struct list_head *fmr_list); 995 996 int qib_dealloc_fmr(struct ib_fmr *ibfmr); 997 998 void qib_release_mmap_info(struct kref *ref); 999 1000 struct qib_mmap_info *qib_create_mmap_info(struct qib_ibdev *dev, u32 size, 1001 struct ib_ucontext *context, 1002 void *obj); 1003 1004 void qib_update_mmap_info(struct qib_ibdev *dev, struct qib_mmap_info *ip, 1005 u32 size, void *obj); 1006 1007 int qib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); 1008 1009 int qib_get_rwqe(struct qib_qp *qp, int wr_id_only); 1010 1011 void qib_migrate_qp(struct qib_qp *qp); 1012 1013 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr, 1014 int has_grh, struct qib_qp *qp, u32 bth0); 1015 1016 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr, 1017 struct ib_global_route *grh, u32 hwords, u32 nwords); 1018 1019 void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr, 1020 u32 bth0, u32 bth2); 1021 1022 void qib_do_send(struct work_struct *work); 1023 1024 void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe, 1025 enum ib_wc_status status); 1026 1027 void qib_send_rc_ack(struct qib_qp *qp); 1028 1029 int qib_make_rc_req(struct qib_qp *qp); 1030 1031 int qib_make_uc_req(struct qib_qp *qp); 1032 1033 int qib_make_ud_req(struct qib_qp *qp); 1034 1035 int qib_register_ib_device(struct qib_devdata *); 1036 1037 void qib_unregister_ib_device(struct qib_devdata *); 1038 1039 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32); 1040 1041 void qib_ib_piobufavail(struct qib_devdata *); 1042 1043 unsigned qib_get_npkeys(struct qib_devdata *); 1044 1045 unsigned qib_get_pkey(struct qib_ibport *, unsigned); 1046 1047 extern const enum ib_wc_opcode ib_qib_wc_opcode[]; 1048 1049 /* 1050 * Below HCA-independent IB PhysPortState values, returned 1051 * by the f_ibphys_portstate() routine. 1052 */ 1053 #define IB_PHYSPORTSTATE_SLEEP 1 1054 #define IB_PHYSPORTSTATE_POLL 2 1055 #define IB_PHYSPORTSTATE_DISABLED 3 1056 #define IB_PHYSPORTSTATE_CFG_TRAIN 4 1057 #define IB_PHYSPORTSTATE_LINKUP 5 1058 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6 1059 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8 1060 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB 1061 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC 1062 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE 1063 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF 1064 #define IB_PHYSPORTSTATE_CFG_ENH 0x10 1065 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13 1066 1067 extern const int ib_qib_state_ops[]; 1068 1069 extern __be64 ib_qib_sys_image_guid; /* in network order */ 1070 1071 extern unsigned int ib_qib_lkey_table_size; 1072 1073 extern unsigned int ib_qib_max_cqes; 1074 1075 extern unsigned int ib_qib_max_cqs; 1076 1077 extern unsigned int ib_qib_max_qp_wrs; 1078 1079 extern unsigned int ib_qib_max_qps; 1080 1081 extern unsigned int ib_qib_max_sges; 1082 1083 extern unsigned int ib_qib_max_mcast_grps; 1084 1085 extern unsigned int ib_qib_max_mcast_qp_attached; 1086 1087 extern unsigned int ib_qib_max_srqs; 1088 1089 extern unsigned int ib_qib_max_srq_sges; 1090 1091 extern unsigned int ib_qib_max_srq_wrs; 1092 1093 extern const u32 ib_qib_rnr_table[]; 1094 1095 extern struct ib_dma_mapping_ops qib_dma_mapping_ops; 1096 1097 #endif /* QIB_VERBS_H */ 1098