drivers/infiniband/hw/qib/qib_verbs.h

   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 */