drivers/staging/rdma/ipath/ipath_verbs.h

   1 /*
   2  * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
   3  * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #ifndef IPATH_VERBS_H
  35 #define IPATH_VERBS_H
  36
  37 #include <linux/types.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/kernel.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/kref.h>
  42 #include <rdma/ib_pack.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "ipath_kernel.h"
  46
  47 #define IPATH_MAX_RDMA_ATOMIC   4
  48
  49 #define QPN_MAX                 (1 << 24)
  50 #define QPNMAP_ENTRIES          (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
  51
  52 /*
  53  * Increment this value if any changes that break userspace ABI
  54  * compatibility are made.
  55  */
  56 #define IPATH_UVERBS_ABI_VERSION       2
  57
  58 /*
  59  * Define an ib_cq_notify value that is not valid so we know when CQ
  60  * notifications are armed.
  61  */
  62 #define IB_CQ_NONE      (IB_CQ_NEXT_COMP + 1)
  63
  64 /* AETH NAK opcode values */
  65 #define IB_RNR_NAK                      0x20
  66 #define IB_NAK_PSN_ERROR                0x60
  67 #define IB_NAK_INVALID_REQUEST          0x61
  68 #define IB_NAK_REMOTE_ACCESS_ERROR      0x62
  69 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
  70 #define IB_NAK_INVALID_RD_REQUEST       0x64
  71
  72 /* Flags for checking QP state (see ib_ipath_state_ops[]) */
  73 #define IPATH_POST_SEND_OK              0x01
  74 #define IPATH_POST_RECV_OK              0x02
  75 #define IPATH_PROCESS_RECV_OK           0x04
  76 #define IPATH_PROCESS_SEND_OK           0x08
  77 #define IPATH_PROCESS_NEXT_SEND_OK      0x10
  78 #define IPATH_FLUSH_SEND                0x20
  79 #define IPATH_FLUSH_RECV                0x40
  80 #define IPATH_PROCESS_OR_FLUSH_SEND \
  81         (IPATH_PROCESS_SEND_OK | IPATH_FLUSH_SEND)
  82
  83 /* IB Performance Manager status values */
  84 #define IB_PMA_SAMPLE_STATUS_DONE       0x00
  85 #define IB_PMA_SAMPLE_STATUS_STARTED    0x01
  86 #define IB_PMA_SAMPLE_STATUS_RUNNING    0x02
  87
  88 /* Mandatory IB performance counter select values. */
  89 #define IB_PMA_PORT_XMIT_DATA   cpu_to_be16(0x0001)
  90 #define IB_PMA_PORT_RCV_DATA    cpu_to_be16(0x0002)
  91 #define IB_PMA_PORT_XMIT_PKTS   cpu_to_be16(0x0003)
  92 #define IB_PMA_PORT_RCV_PKTS    cpu_to_be16(0x0004)
  93 #define IB_PMA_PORT_XMIT_WAIT   cpu_to_be16(0x0005)
  94
  95 struct ib_reth {
  96         __be64 vaddr;
  97         __be32 rkey;
  98         __be32 length;
  99 } __attribute__ ((packed));
 100
 101 struct ib_atomic_eth {
 102         __be32 vaddr[2];        /* unaligned so access as 2 32-bit words */
 103         __be32 rkey;
 104         __be64 swap_data;
 105         __be64 compare_data;
 106 } __attribute__ ((packed));
 107
 108 struct ipath_other_headers {
 109         __be32 bth[3];
 110         union {
 111                 struct {
 112                         __be32 deth[2];
 113                         __be32 imm_data;
 114                 } ud;
 115                 struct {
 116                         struct ib_reth reth;
 117                         __be32 imm_data;
 118                 } rc;
 119                 struct {
 120                         __be32 aeth;
 121                         __be32 atomic_ack_eth[2];
 122                 } at;
 123                 __be32 imm_data;
 124                 __be32 aeth;
 125                 struct ib_atomic_eth atomic_eth;
 126         } u;
 127 } __attribute__ ((packed));
 128
 129 /*
 130  * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
 131  * long (72 w/ imm_data).  Only the first 56 bytes of the IB header
 132  * will be in the eager header buffer.  The remaining 12 or 16 bytes
 133  * are in the data buffer.
 134  */
 135 struct ipath_ib_header {
 136         __be16 lrh[4];
 137         union {
 138                 struct {
 139                         struct ib_grh grh;
 140                         struct ipath_other_headers oth;
 141                 } l;
 142                 struct ipath_other_headers oth;
 143         } u;
 144 } __attribute__ ((packed));
 145
 146 struct ipath_pio_header {
 147         __le32 pbc[2];
 148         struct ipath_ib_header hdr;
 149 } __attribute__ ((packed));
 150
 151 /*
 152  * There is one struct ipath_mcast for each multicast GID.
 153  * All attached QPs are then stored as a list of
 154  * struct ipath_mcast_qp.
 155  */
 156 struct ipath_mcast_qp {
 157         struct list_head list;
 158         struct ipath_qp *qp;
 159 };
 160
 161 struct ipath_mcast {
 162         struct rb_node rb_node;
 163         union ib_gid mgid;
 164         struct list_head qp_list;
 165         wait_queue_head_t wait;
 166         atomic_t refcount;
 167         int n_attached;
 168 };
 169
 170 /* Protection domain */
 171 struct ipath_pd {
 172         struct ib_pd ibpd;
 173         int user;               /* non-zero if created from user space */
 174 };
 175
 176 /* Address Handle */
 177 struct ipath_ah {
 178         struct ib_ah ibah;
 179         struct ib_ah_attr attr;
 180 };
 181
 182 /*
 183  * This structure is used by ipath_mmap() to validate an offset
 184  * when an mmap() request is made.  The vm_area_struct then uses
 185  * this as its vm_private_data.
 186  */
 187 struct ipath_mmap_info {
 188         struct list_head pending_mmaps;
 189         struct ib_ucontext *context;
 190         void *obj;
 191         __u64 offset;
 192         struct kref ref;
 193         unsigned size;
 194 };
 195
 196 /*
 197  * This structure is used to contain the head pointer, tail pointer,
 198  * and completion queue entries as a single memory allocation so
 199  * it can be mmap'ed into user space.
 200  */
 201 struct ipath_cq_wc {
 202         u32 head;               /* index of next entry to fill */
 203         u32 tail;               /* index of next ib_poll_cq() entry */
 204         union {
 205                 /* these are actually size ibcq.cqe + 1 */
 206                 struct ib_uverbs_wc uqueue[0];
 207                 struct ib_wc kqueue[0];
 208         };
 209 };
 210
 211 /*
 212  * The completion queue structure.
 213  */
 214 struct ipath_cq {
 215         struct ib_cq ibcq;
 216         struct tasklet_struct comptask;
 217         spinlock_t lock;
 218         u8 notify;
 219         u8 triggered;
 220         struct ipath_cq_wc *queue;
 221         struct ipath_mmap_info *ip;
 222 };
 223
 224 /*
 225  * A segment is a linear region of low physical memory.
 226  * XXX Maybe we should use phys addr here and kmap()/kunmap().
 227  * Used by the verbs layer.
 228  */
 229 struct ipath_seg {
 230         void *vaddr;
 231         size_t length;
 232 };
 233
 234 /* The number of ipath_segs that fit in a page. */
 235 #define IPATH_SEGSZ     (PAGE_SIZE / sizeof (struct ipath_seg))
 236
 237 struct ipath_segarray {
 238         struct ipath_seg segs[IPATH_SEGSZ];
 239 };
 240
 241 struct ipath_mregion {
 242         struct ib_pd *pd;       /* shares refcnt of ibmr.pd */
 243         u64 user_base;          /* User's address for this region */
 244         u64 iova;               /* IB start address of this region */
 245         size_t length;
 246         u32 lkey;
 247         u32 offset;             /* offset (bytes) to start of region */
 248         int access_flags;
 249         u32 max_segs;           /* number of ipath_segs in all the arrays */
 250         u32 mapsz;              /* size of the map array */
 251         struct ipath_segarray *map[0];  /* the segments */
 252 };
 253
 254 /*
 255  * These keep track of the copy progress within a memory region.
 256  * Used by the verbs layer.
 257  */
 258 struct ipath_sge {
 259         struct ipath_mregion *mr;
 260         void *vaddr;            /* kernel virtual address of segment */
 261         u32 sge_length;         /* length of the SGE */
 262         u32 length;             /* remaining length of the segment */
 263         u16 m;                  /* current index: mr->map[m] */
 264         u16 n;                  /* current index: mr->map[m]->segs[n] */
 265 };
 266
 267 /* Memory region */
 268 struct ipath_mr {
 269         struct ib_mr ibmr;
 270         struct ib_umem *umem;
 271         struct ipath_mregion mr;        /* must be last */
 272 };
 273
 274 /*
 275  * Send work request queue entry.
 276  * The size of the sg_list is determined when the QP is created and stored
 277  * in qp->s_max_sge.
 278  */
 279 struct ipath_swqe {
 280         union {
 281                 struct ib_send_wr wr;   /* don't use wr.sg_list */
 282                 struct ib_ud_wr ud_wr;
 283                 struct ib_rdma_wr rdma_wr;
 284                 struct ib_atomic_wr atomic_wr;
 285         };
 286
 287         u32 psn;                /* first packet sequence number */
 288         u32 lpsn;               /* last packet sequence number */
 289         u32 ssn;                /* send sequence number */
 290         u32 length;             /* total length of data in sg_list */
 291         struct ipath_sge sg_list[0];
 292 };
 293
 294 /*
 295  * Receive work request queue entry.
 296  * The size of the sg_list is determined when the QP (or SRQ) is created
 297  * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
 298  */
 299 struct ipath_rwqe {
 300         u64 wr_id;
 301         u8 num_sge;
 302         struct ib_sge sg_list[0];
 303 };
 304
 305 /*
 306  * This structure is used to contain the head pointer, tail pointer,
 307  * and receive work queue entries as a single memory allocation so
 308  * it can be mmap'ed into user space.
 309  * Note that the wq array elements are variable size so you can't
 310  * just index into the array to get the N'th element;
 311  * use get_rwqe_ptr() instead.
 312  */
 313 struct ipath_rwq {
 314         u32 head;               /* new work requests posted to the head */
 315         u32 tail;               /* receives pull requests from here. */
 316         struct ipath_rwqe wq[0];
 317 };
 318
 319 struct ipath_rq {
 320         struct ipath_rwq *wq;
 321         spinlock_t lock;
 322         u32 size;               /* size of RWQE array */
 323         u8 max_sge;
 324 };
 325
 326 struct ipath_srq {
 327         struct ib_srq ibsrq;
 328         struct ipath_rq rq;
 329         struct ipath_mmap_info *ip;
 330         /* send signal when number of RWQEs < limit */
 331         u32 limit;
 332 };
 333
 334 struct ipath_sge_state {
 335         struct ipath_sge *sg_list;      /* next SGE to be used if any */
 336         struct ipath_sge sge;   /* progress state for the current SGE */
 337         u8 num_sge;
 338         u8 static_rate;
 339 };
 340
 341 /*
 342  * This structure holds the information that the send tasklet needs
 343  * to send a RDMA read response or atomic operation.
 344  */
 345 struct ipath_ack_entry {
 346         u8 opcode;
 347         u8 sent;
 348         u32 psn;
 349         union {
 350                 struct ipath_sge_state rdma_sge;
 351                 u64 atomic_data;
 352         };
 353 };
 354
 355 /*
 356  * Variables prefixed with s_ are for the requester (sender).
 357  * Variables prefixed with r_ are for the responder (receiver).
 358  * Variables prefixed with ack_ are for responder replies.
 359  *
 360  * Common variables are protected by both r_rq.lock and s_lock in that order
 361  * which only happens in modify_qp() or changing the QP 'state'.
 362  */
 363 struct ipath_qp {
 364         struct ib_qp ibqp;
 365         struct ipath_qp *next;          /* link list for QPN hash table */
 366         struct ipath_qp *timer_next;    /* link list for ipath_ib_timer() */
 367         struct ipath_qp *pio_next;      /* link for ipath_ib_piobufavail() */
 368         struct list_head piowait;       /* link for wait PIO buf */
 369         struct list_head timerwait;     /* link for waiting for timeouts */
 370         struct ib_ah_attr remote_ah_attr;
 371         struct ipath_ib_header s_hdr;   /* next packet header to send */
 372         atomic_t refcount;
 373         wait_queue_head_t wait;
 374         wait_queue_head_t wait_dma;
 375         struct tasklet_struct s_task;
 376         struct ipath_mmap_info *ip;
 377         struct ipath_sge_state *s_cur_sge;
 378         struct ipath_verbs_txreq *s_tx;
 379         struct ipath_sge_state s_sge;   /* current send request data */
 380         struct ipath_ack_entry s_ack_queue[IPATH_MAX_RDMA_ATOMIC + 1];
 381         struct ipath_sge_state s_ack_rdma_sge;
 382         struct ipath_sge_state s_rdma_read_sge;
 383         struct ipath_sge_state r_sge;   /* current receive data */
 384         spinlock_t s_lock;
 385         atomic_t s_dma_busy;
 386         u16 s_pkt_delay;
 387         u16 s_hdrwords;         /* size of s_hdr in 32 bit words */
 388         u32 s_cur_size;         /* size of send packet in bytes */
 389         u32 s_len;              /* total length of s_sge */
 390         u32 s_rdma_read_len;    /* total length of s_rdma_read_sge */
 391         u32 s_next_psn;         /* PSN for next request */
 392         u32 s_last_psn;         /* last response PSN processed */
 393         u32 s_psn;              /* current packet sequence number */
 394         u32 s_ack_rdma_psn;     /* PSN for sending RDMA read responses */
 395         u32 s_ack_psn;          /* PSN for acking sends and RDMA writes */
 396         u32 s_rnr_timeout;      /* number of milliseconds for RNR timeout */
 397         u32 r_ack_psn;          /* PSN for next ACK or atomic ACK */
 398         u64 r_wr_id;            /* ID for current receive WQE */
 399         unsigned long r_aflags;
 400         u32 r_len;              /* total length of r_sge */
 401         u32 r_rcv_len;          /* receive data len processed */
 402         u32 r_psn;              /* expected rcv packet sequence number */
 403         u32 r_msn;              /* message sequence number */
 404         u8 state;               /* QP state */
 405         u8 s_state;             /* opcode of last packet sent */
 406         u8 s_ack_state;         /* opcode of packet to ACK */
 407         u8 s_nak_state;         /* non-zero if NAK is pending */
 408         u8 r_state;             /* opcode of last packet received */
 409         u8 r_nak_state;         /* non-zero if NAK is pending */
 410         u8 r_min_rnr_timer;     /* retry timeout value for RNR NAKs */
 411         u8 r_flags;
 412         u8 r_max_rd_atomic;     /* max number of RDMA read/atomic to receive */
 413         u8 r_head_ack_queue;    /* index into s_ack_queue[] */
 414         u8 qp_access_flags;
 415         u8 s_max_sge;           /* size of s_wq->sg_list */
 416         u8 s_retry_cnt;         /* number of times to retry */
 417         u8 s_rnr_retry_cnt;
 418         u8 s_retry;             /* requester retry counter */
 419         u8 s_rnr_retry;         /* requester RNR retry counter */
 420         u8 s_pkey_index;        /* PKEY index to use */
 421         u8 s_max_rd_atomic;     /* max number of RDMA read/atomic to send */
 422         u8 s_num_rd_atomic;     /* number of RDMA read/atomic pending */
 423         u8 s_tail_ack_queue;    /* index into s_ack_queue[] */
 424         u8 s_flags;
 425         u8 s_dmult;
 426         u8 s_draining;
 427         u8 timeout;             /* Timeout for this QP */
 428         enum ib_mtu path_mtu;
 429         u32 remote_qpn;
 430         u32 qkey;               /* QKEY for this QP (for UD or RD) */
 431         u32 s_size;             /* send work queue size */
 432         u32 s_head;             /* new entries added here */
 433         u32 s_tail;             /* next entry to process */
 434         u32 s_cur;              /* current work queue entry */
 435         u32 s_last;             /* last un-ACK'ed entry */
 436         u32 s_ssn;              /* SSN of tail entry */
 437         u32 s_lsn;              /* limit sequence number (credit) */
 438         struct ipath_swqe *s_wq;        /* send work queue */
 439         struct ipath_swqe *s_wqe;
 440         struct ipath_sge *r_ud_sg_list;
 441         struct ipath_rq r_rq;           /* receive work queue */
 442         struct ipath_sge r_sg_list[0];  /* verified SGEs */
 443 };
 444
 445 /*
 446  * Atomic bit definitions for r_aflags.
 447  */
 448 #define IPATH_R_WRID_VALID      0
 449
 450 /*
 451  * Bit definitions for r_flags.
 452  */
 453 #define IPATH_R_REUSE_SGE       0x01
 454 #define IPATH_R_RDMAR_SEQ       0x02
 455
 456 /*
 457  * Bit definitions for s_flags.
 458  *
 459  * IPATH_S_FENCE_PENDING - waiting for all prior RDMA read or atomic SWQEs
 460  *                         before processing the next SWQE
 461  * IPATH_S_RDMAR_PENDING - waiting for any RDMA read or atomic SWQEs
 462  *                         before processing the next SWQE
 463  * IPATH_S_WAITING - waiting for RNR timeout or send buffer available.
 464  * IPATH_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
 465  * IPATH_S_WAIT_DMA - waiting for send DMA queue to drain before generating
 466  *                    next send completion entry not via send DMA.
 467  */
 468 #define IPATH_S_SIGNAL_REQ_WR   0x01
 469 #define IPATH_S_FENCE_PENDING   0x02
 470 #define IPATH_S_RDMAR_PENDING   0x04
 471 #define IPATH_S_ACK_PENDING     0x08
 472 #define IPATH_S_BUSY            0x10
 473 #define IPATH_S_WAITING         0x20
 474 #define IPATH_S_WAIT_SSN_CREDIT 0x40
 475 #define IPATH_S_WAIT_DMA        0x80
 476
 477 #define IPATH_S_ANY_WAIT (IPATH_S_FENCE_PENDING | IPATH_S_RDMAR_PENDING | \
 478         IPATH_S_WAITING | IPATH_S_WAIT_SSN_CREDIT | IPATH_S_WAIT_DMA)
 479
 480 #define IPATH_PSN_CREDIT        512
 481
 482 /*
 483  * Since struct ipath_swqe is not a fixed size, we can't simply index into
 484  * struct ipath_qp.s_wq.  This function does the array index computation.
 485  */
 486 static inline struct ipath_swqe *get_swqe_ptr(struct ipath_qp *qp,
 487                                               unsigned n)
 488 {
 489         return (struct ipath_swqe *)((char *)qp->s_wq +
 490                                      (sizeof(struct ipath_swqe) +
 491                                       qp->s_max_sge *
 492                                       sizeof(struct ipath_sge)) * n);
 493 }
 494
 495 /*
 496  * Since struct ipath_rwqe is not a fixed size, we can't simply index into
 497  * struct ipath_rwq.wq.  This function does the array index computation.
 498  */
 499 static inline struct ipath_rwqe *get_rwqe_ptr(struct ipath_rq *rq,
 500                                               unsigned n)
 501 {
 502         return (struct ipath_rwqe *)
 503                 ((char *) rq->wq->wq +
 504                  (sizeof(struct ipath_rwqe) +
 505                   rq->max_sge * sizeof(struct ib_sge)) * n);
 506 }
 507
 508 /*
 509  * QPN-map pages start out as NULL, they get allocated upon
 510  * first use and are never deallocated. This way,
 511  * large bitmaps are not allocated unless large numbers of QPs are used.
 512  */
 513 struct qpn_map {
 514         atomic_t n_free;
 515         void *page;
 516 };
 517
 518 struct ipath_qp_table {
 519         spinlock_t lock;
 520         u32 last;               /* last QP number allocated */
 521         u32 max;                /* size of the hash table */
 522         u32 nmaps;              /* size of the map table */
 523         struct ipath_qp **table;
 524         /* bit map of free numbers */
 525         struct qpn_map map[QPNMAP_ENTRIES];
 526 };
 527
 528 struct ipath_lkey_table {
 529         spinlock_t lock;
 530         u32 next;               /* next unused index (speeds search) */
 531         u32 gen;                /* generation count */
 532         u32 max;                /* size of the table */
 533         struct ipath_mregion **table;
 534 };
 535
 536 struct ipath_opcode_stats {
 537         u64 n_packets;          /* number of packets */
 538         u64 n_bytes;            /* total number of bytes */
 539 };
 540
 541 struct ipath_ibdev {
 542         struct ib_device ibdev;
 543         struct ipath_devdata *dd;
 544         struct list_head pending_mmaps;
 545         spinlock_t mmap_offset_lock;
 546         u32 mmap_offset;
 547         int ib_unit;            /* This is the device number */
 548         u16 sm_lid;             /* in host order */
 549         u8 sm_sl;
 550         u8 mkeyprot;
 551         /* non-zero when timer is set */
 552         unsigned long mkey_lease_timeout;
 553
 554         /* The following fields are really per port. */
 555         struct ipath_qp_table qp_table;
 556         struct ipath_lkey_table lk_table;
 557         struct list_head pending[3];    /* FIFO of QPs waiting for ACKs */
 558         struct list_head piowait;       /* list for wait PIO buf */
 559         struct list_head txreq_free;
 560         void *txreq_bufs;
 561         /* list of QPs waiting for RNR timer */
 562         struct list_head rnrwait;
 563         spinlock_t pending_lock;
 564         __be64 sys_image_guid;  /* in network order */
 565         __be64 gid_prefix;      /* in network order */
 566         __be64 mkey;
 567
 568         u32 n_pds_allocated;    /* number of PDs allocated for device */
 569         spinlock_t n_pds_lock;
 570         u32 n_ahs_allocated;    /* number of AHs allocated for device */
 571         spinlock_t n_ahs_lock;
 572         u32 n_cqs_allocated;    /* number of CQs allocated for device */
 573         spinlock_t n_cqs_lock;
 574         u32 n_qps_allocated;    /* number of QPs allocated for device */
 575         spinlock_t n_qps_lock;
 576         u32 n_srqs_allocated;   /* number of SRQs allocated for device */
 577         spinlock_t n_srqs_lock;
 578         u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
 579         spinlock_t n_mcast_grps_lock;
 580
 581         u64 ipath_sword;        /* total dwords sent (sample result) */
 582         u64 ipath_rword;        /* total dwords received (sample result) */
 583         u64 ipath_spkts;        /* total packets sent (sample result) */
 584         u64 ipath_rpkts;        /* total packets received (sample result) */
 585         /* # of ticks no data sent (sample result) */
 586         u64 ipath_xmit_wait;
 587         u64 rcv_errors;         /* # of packets with SW detected rcv errs */
 588         u64 n_unicast_xmit;     /* total unicast packets sent */
 589         u64 n_unicast_rcv;      /* total unicast packets received */
 590         u64 n_multicast_xmit;   /* total multicast packets sent */
 591         u64 n_multicast_rcv;    /* total multicast packets received */
 592         u64 z_symbol_error_counter;             /* starting count for PMA */
 593         u64 z_link_error_recovery_counter;      /* starting count for PMA */
 594         u64 z_link_downed_counter;              /* starting count for PMA */
 595         u64 z_port_rcv_errors;                  /* starting count for PMA */
 596         u64 z_port_rcv_remphys_errors;          /* starting count for PMA */
 597         u64 z_port_xmit_discards;               /* starting count for PMA */
 598         u64 z_port_xmit_data;                   /* starting count for PMA */
 599         u64 z_port_rcv_data;                    /* starting count for PMA */
 600         u64 z_port_xmit_packets;                /* starting count for PMA */
 601         u64 z_port_rcv_packets;                 /* starting count for PMA */
 602         u32 z_pkey_violations;                  /* starting count for PMA */
 603         u32 z_local_link_integrity_errors;      /* starting count for PMA */
 604         u32 z_excessive_buffer_overrun_errors;  /* starting count for PMA */
 605         u32 z_vl15_dropped;                     /* starting count for PMA */
 606         u32 n_rc_resends;
 607         u32 n_rc_acks;
 608         u32 n_rc_qacks;
 609         u32 n_seq_naks;
 610         u32 n_rdma_seq;
 611         u32 n_rnr_naks;
 612         u32 n_other_naks;
 613         u32 n_timeouts;
 614         u32 n_pkt_drops;
 615         u32 n_vl15_dropped;
 616         u32 n_wqe_errs;
 617         u32 n_rdma_dup_busy;
 618         u32 n_piowait;
 619         u32 n_unaligned;
 620         u32 port_cap_flags;
 621         u32 pma_sample_start;
 622         u32 pma_sample_interval;
 623         __be16 pma_counter_select[5];
 624         u16 pma_tag;
 625         u16 qkey_violations;
 626         u16 mkey_violations;
 627         u16 mkey_lease_period;
 628         u16 pending_index;      /* which pending queue is active */
 629         u8 pma_sample_status;
 630         u8 subnet_timeout;
 631         u8 vl_high_limit;
 632         struct ipath_opcode_stats opstats[128];
 633 };
 634
 635 struct ipath_verbs_counters {
 636         u64 symbol_error_counter;
 637         u64 link_error_recovery_counter;
 638         u64 link_downed_counter;
 639         u64 port_rcv_errors;
 640         u64 port_rcv_remphys_errors;
 641         u64 port_xmit_discards;
 642         u64 port_xmit_data;
 643         u64 port_rcv_data;
 644         u64 port_xmit_packets;
 645         u64 port_rcv_packets;
 646         u32 local_link_integrity_errors;
 647         u32 excessive_buffer_overrun_errors;
 648         u32 vl15_dropped;
 649 };
 650
 651 struct ipath_verbs_txreq {
 652         struct ipath_qp         *qp;
 653         struct ipath_swqe       *wqe;
 654         u32                      map_len;
 655         u32                      len;
 656         struct ipath_sge_state  *ss;
 657         struct ipath_pio_header  hdr;
 658         struct ipath_sdma_txreq  txreq;
 659 };
 660
 661 static inline struct ipath_mr *to_imr(struct ib_mr *ibmr)
 662 {
 663         return container_of(ibmr, struct ipath_mr, ibmr);
 664 }
 665
 666 static inline struct ipath_pd *to_ipd(struct ib_pd *ibpd)
 667 {
 668         return container_of(ibpd, struct ipath_pd, ibpd);
 669 }
 670
 671 static inline struct ipath_ah *to_iah(struct ib_ah *ibah)
 672 {
 673         return container_of(ibah, struct ipath_ah, ibah);
 674 }
 675
 676 static inline struct ipath_cq *to_icq(struct ib_cq *ibcq)
 677 {
 678         return container_of(ibcq, struct ipath_cq, ibcq);
 679 }
 680
 681 static inline struct ipath_srq *to_isrq(struct ib_srq *ibsrq)
 682 {
 683         return container_of(ibsrq, struct ipath_srq, ibsrq);
 684 }
 685
 686 static inline struct ipath_qp *to_iqp(struct ib_qp *ibqp)
 687 {
 688         return container_of(ibqp, struct ipath_qp, ibqp);
 689 }
 690
 691 static inline struct ipath_ibdev *to_idev(struct ib_device *ibdev)
 692 {
 693         return container_of(ibdev, struct ipath_ibdev, ibdev);
 694 }
 695
 696 /*
 697  * This must be called with s_lock held.
 698  */
 699 static inline void ipath_schedule_send(struct ipath_qp *qp)
 700 {
 701         if (qp->s_flags & IPATH_S_ANY_WAIT)
 702                 qp->s_flags &= ~IPATH_S_ANY_WAIT;
 703         if (!(qp->s_flags & IPATH_S_BUSY))
 704                 tasklet_hi_schedule(&qp->s_task);
 705 }
 706
 707 int ipath_process_mad(struct ib_device *ibdev,
 708                       int mad_flags,
 709                       u8 port_num,
 710                       const struct ib_wc *in_wc,
 711                       const struct ib_grh *in_grh,
 712                       const struct ib_mad_hdr *in, size_t in_mad_size,
 713                       struct ib_mad_hdr *out, size_t *out_mad_size,
 714                       u16 *out_mad_pkey_index);
 715
 716 /*
 717  * Compare the lower 24 bits of the two values.
 718  * Returns an integer <, ==, or > than zero.
 719  */
 720 static inline int ipath_cmp24(u32 a, u32 b)
 721 {
 722         return (((int) a) - ((int) b)) << 8;
 723 }
 724
 725 struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid);
 726
 727 int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
 728                             u64 *rwords, u64 *spkts, u64 *rpkts,
 729                             u64 *xmit_wait);
 730
 731 int ipath_get_counters(struct ipath_devdata *dd,
 732                        struct ipath_verbs_counters *cntrs);
 733
 734 int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
 735
 736 int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
 737
 738 int ipath_mcast_tree_empty(void);
 739
 740 __be32 ipath_compute_aeth(struct ipath_qp *qp);
 741
 742 struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn);
 743
 744 struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
 745                               struct ib_qp_init_attr *init_attr,
 746                               struct ib_udata *udata);
 747
 748 int ipath_destroy_qp(struct ib_qp *ibqp);
 749
 750 int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err);
 751
 752 int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 753                     int attr_mask, struct ib_udata *udata);
 754
 755 int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 756                    int attr_mask, struct ib_qp_init_attr *init_attr);
 757
 758 unsigned ipath_free_all_qps(struct ipath_qp_table *qpt);
 759
 760 int ipath_init_qp_table(struct ipath_ibdev *idev, int size);
 761
 762 void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
 763
 764 unsigned ipath_ib_rate_to_mult(enum ib_rate rate);
 765
 766 int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
 767                      u32 hdrwords, struct ipath_sge_state *ss, u32 len);
 768
 769 void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);
 770
 771 void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
 772
 773 void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 774                   int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
 775
 776 void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 777                   int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
 778
 779 void ipath_restart_rc(struct ipath_qp *qp, u32 psn);
 780
 781 void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err);
 782
 783 int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);
 784
 785 void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 786                   int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
 787
 788 int ipath_alloc_lkey(struct ipath_lkey_table *rkt,
 789                      struct ipath_mregion *mr);
 790
 791 void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey);
 792
 793 int ipath_lkey_ok(struct ipath_qp *qp, struct ipath_sge *isge,
 794                   struct ib_sge *sge, int acc);
 795
 796 int ipath_rkey_ok(struct ipath_qp *qp, struct ipath_sge_state *ss,
 797                   u32 len, u64 vaddr, u32 rkey, int acc);
 798
 799 int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 800                            struct ib_recv_wr **bad_wr);
 801
 802 struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
 803                                 struct ib_srq_init_attr *srq_init_attr,
 804                                 struct ib_udata *udata);
 805
 806 int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 807                      enum ib_srq_attr_mask attr_mask,
 808                      struct ib_udata *udata);
 809
 810 int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
 811
 812 int ipath_destroy_srq(struct ib_srq *ibsrq);
 813
 814 void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
 815
 816 int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
 817
 818 struct ib_cq *ipath_create_cq(struct ib_device *ibdev,
 819                               const struct ib_cq_init_attr *attr,
 820                               struct ib_ucontext *context,
 821                               struct ib_udata *udata);
 822
 823 int ipath_destroy_cq(struct ib_cq *ibcq);
 824
 825 int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
 826
 827 int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
 828
 829 struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc);
 830
 831 struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 832                                 u64 virt_addr, int mr_access_flags,
 833                                 struct ib_udata *udata);
 834
 835 int ipath_dereg_mr(struct ib_mr *ibmr);
 836
 837 struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
 838                                struct ib_fmr_attr *fmr_attr);
 839
 840 int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
 841                        int list_len, u64 iova);
 842
 843 int ipath_unmap_fmr(struct list_head *fmr_list);
 844
 845 int ipath_dealloc_fmr(struct ib_fmr *ibfmr);
 846
 847 void ipath_release_mmap_info(struct kref *ref);
 848
 849 struct ipath_mmap_info *ipath_create_mmap_info(struct ipath_ibdev *dev,
 850                                                u32 size,
 851                                                struct ib_ucontext *context,
 852                                                void *obj);
 853
 854 void ipath_update_mmap_info(struct ipath_ibdev *dev,
 855                             struct ipath_mmap_info *ip,
 856                             u32 size, void *obj);
 857
 858 int ipath_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 859
 860 void ipath_insert_rnr_queue(struct ipath_qp *qp);
 861
 862 int ipath_init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
 863                    u32 *lengthp, struct ipath_sge_state *ss);
 864
 865 int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
 866
 867 u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
 868                    struct ib_global_route *grh, u32 hwords, u32 nwords);
 869
 870 void ipath_make_ruc_header(struct ipath_ibdev *dev, struct ipath_qp *qp,
 871                            struct ipath_other_headers *ohdr,
 872                            u32 bth0, u32 bth2);
 873
 874 void ipath_do_send(unsigned long data);
 875
 876 void ipath_send_complete(struct ipath_qp *qp, struct ipath_swqe *wqe,
 877                          enum ib_wc_status status);
 878
 879 int ipath_make_rc_req(struct ipath_qp *qp);
 880
 881 int ipath_make_uc_req(struct ipath_qp *qp);
 882
 883 int ipath_make_ud_req(struct ipath_qp *qp);
 884
 885 int ipath_register_ib_device(struct ipath_devdata *);
 886
 887 void ipath_unregister_ib_device(struct ipath_ibdev *);
 888
 889 void ipath_ib_rcv(struct ipath_ibdev *, void *, void *, u32);
 890
 891 int ipath_ib_piobufavail(struct ipath_ibdev *);
 892
 893 unsigned ipath_get_npkeys(struct ipath_devdata *);
 894
 895 u32 ipath_get_cr_errpkey(struct ipath_devdata *);
 896
 897 unsigned ipath_get_pkey(struct ipath_devdata *, unsigned);
 898
 899 extern const enum ib_wc_opcode ib_ipath_wc_opcode[];
 900
 901 /*
 902  * Below converts HCA-specific LinkTrainingState to IB PhysPortState
 903  * values.
 904  */
 905 extern const u8 ipath_cvt_physportstate[];
 906 #define IB_PHYSPORTSTATE_SLEEP 1
 907 #define IB_PHYSPORTSTATE_POLL 2
 908 #define IB_PHYSPORTSTATE_DISABLED 3
 909 #define IB_PHYSPORTSTATE_CFG_TRAIN 4
 910 #define IB_PHYSPORTSTATE_LINKUP 5
 911 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
 912
 913 extern const int ib_ipath_state_ops[];
 914
 915 extern unsigned int ib_ipath_lkey_table_size;
 916
 917 extern unsigned int ib_ipath_max_cqes;
 918
 919 extern unsigned int ib_ipath_max_cqs;
 920
 921 extern unsigned int ib_ipath_max_qp_wrs;
 922
 923 extern unsigned int ib_ipath_max_qps;
 924
 925 extern unsigned int ib_ipath_max_sges;
 926
 927 extern unsigned int ib_ipath_max_mcast_grps;
 928
 929 extern unsigned int ib_ipath_max_mcast_qp_attached;
 930
 931 extern unsigned int ib_ipath_max_srqs;
 932
 933 extern unsigned int ib_ipath_max_srq_sges;
 934
 935 extern unsigned int ib_ipath_max_srq_wrs;
 936
 937 extern const u32 ib_ipath_rnr_table[];
 938
 939 extern struct ib_dma_mapping_ops ipath_dma_mapping_ops;
 940
 941 #endif                          /* IPATH_VERBS_H */