drivers/infiniband/hw/cxgb4/iw_cxgb4.h

   1 /*
   2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *      - Redistributions in binary form must reproduce the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer in the documentation and/or other materials
  20  *        provided with the distribution.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  26  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  27  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  28  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  29  * SOFTWARE.
  30  */
  31 #ifndef __IW_CXGB4_H__
  32 #define __IW_CXGB4_H__
  33
  34 #include <linux/mutex.h>
  35 #include <linux/list.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/idr.h>
  38 #include <linux/completion.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/sched.h>
  41 #include <linux/pci.h>
  42 #include <linux/dma-mapping.h>
  43 #include <linux/inet.h>
  44 #include <linux/wait.h>
  45 #include <linux/kref.h>
  46 #include <linux/timer.h>
  47 #include <linux/io.h>
  48
  49 #include <asm/byteorder.h>
  50
  51 #include <net/net_namespace.h>
  52
  53 #include <rdma/ib_verbs.h>
  54 #include <rdma/iw_cm.h>
  55 #include <rdma/rdma_netlink.h>
  56 #include <rdma/iw_portmap.h>
  57
  58 #include "cxgb4.h"
  59 #include "cxgb4_uld.h"
  60 #include "l2t.h"
  61 #include <rdma/cxgb4-abi.h>
  62
  63 #define DRV_NAME "iw_cxgb4"
  64 #define MOD DRV_NAME ":"
  65
  66 extern int c4iw_debug;
  67 #define PDBG(fmt, args...) \
  68 do { \
  69         if (c4iw_debug) \
  70                 printk(MOD fmt, ## args); \
  71 } while (0)
  72
  73 #include "t4.h"
  74
  75 #define PBL_OFF(rdev_p, a) ((a) - (rdev_p)->lldi.vr->pbl.start)
  76 #define RQT_OFF(rdev_p, a) ((a) - (rdev_p)->lldi.vr->rq.start)
  77
  78 static inline void *cplhdr(struct sk_buff *skb)
  79 {
  80         return skb->data;
  81 }
  82
  83 #define C4IW_ID_TABLE_F_RANDOM 1       /* Pseudo-randomize the id's returned */
  84 #define C4IW_ID_TABLE_F_EMPTY  2       /* Table is initially empty */
  85
  86 struct c4iw_id_table {
  87         u32 flags;
  88         u32 start;              /* logical minimal id */
  89         u32 last;               /* hint for find */
  90         u32 max;
  91         spinlock_t lock;
  92         unsigned long *table;
  93 };
  94
  95 struct c4iw_resource {
  96         struct c4iw_id_table tpt_table;
  97         struct c4iw_id_table qid_table;
  98         struct c4iw_id_table pdid_table;
  99 };
 100
 101 struct c4iw_qid_list {
 102         struct list_head entry;
 103         u32 qid;
 104 };
 105
 106 struct c4iw_dev_ucontext {
 107         struct list_head qpids;
 108         struct list_head cqids;
 109         struct mutex lock;
 110 };
 111
 112 enum c4iw_rdev_flags {
 113         T4_FATAL_ERROR = (1<<0),
 114         T4_STATUS_PAGE_DISABLED = (1<<1),
 115 };
 116
 117 struct c4iw_stat {
 118         u64 total;
 119         u64 cur;
 120         u64 max;
 121         u64 fail;
 122 };
 123
 124 struct c4iw_stats {
 125         struct mutex lock;
 126         struct c4iw_stat qid;
 127         struct c4iw_stat pd;
 128         struct c4iw_stat stag;
 129         struct c4iw_stat pbl;
 130         struct c4iw_stat rqt;
 131         struct c4iw_stat ocqp;
 132         u64  db_full;
 133         u64  db_empty;
 134         u64  db_drop;
 135         u64  db_state_transitions;
 136         u64  db_fc_interruptions;
 137         u64  tcam_full;
 138         u64  act_ofld_conn_fails;
 139         u64  pas_ofld_conn_fails;
 140         u64  neg_adv;
 141 };
 142
 143 struct c4iw_hw_queue {
 144         int t4_eq_status_entries;
 145         int t4_max_eq_size;
 146         int t4_max_iq_size;
 147         int t4_max_rq_size;
 148         int t4_max_sq_size;
 149         int t4_max_qp_depth;
 150         int t4_max_cq_depth;
 151         int t4_stat_len;
 152 };
 153
 154 struct wr_log_entry {
 155         struct timespec post_host_ts;
 156         struct timespec poll_host_ts;
 157         u64 post_sge_ts;
 158         u64 cqe_sge_ts;
 159         u64 poll_sge_ts;
 160         u16 qid;
 161         u16 wr_id;
 162         u8 opcode;
 163         u8 valid;
 164 };
 165
 166 struct c4iw_rdev {
 167         struct c4iw_resource resource;
 168         u32 qpmask;
 169         u32 cqmask;
 170         struct c4iw_dev_ucontext uctx;
 171         struct gen_pool *pbl_pool;
 172         struct gen_pool *rqt_pool;
 173         struct gen_pool *ocqp_pool;
 174         u32 flags;
 175         struct cxgb4_lld_info lldi;
 176         unsigned long bar2_pa;
 177         void __iomem *bar2_kva;
 178         unsigned long oc_mw_pa;
 179         void __iomem *oc_mw_kva;
 180         struct c4iw_stats stats;
 181         struct c4iw_hw_queue hw_queue;
 182         struct t4_dev_status_page *status_page;
 183         atomic_t wr_log_idx;
 184         struct wr_log_entry *wr_log;
 185         int wr_log_size;
 186 };
 187
 188 static inline int c4iw_fatal_error(struct c4iw_rdev *rdev)
 189 {
 190         return rdev->flags & T4_FATAL_ERROR;
 191 }
 192
 193 static inline int c4iw_num_stags(struct c4iw_rdev *rdev)
 194 {
 195         return (int)(rdev->lldi.vr->stag.size >> 5);
 196 }
 197
 198 #define C4IW_WR_TO (60*HZ)
 199
 200 struct c4iw_wr_wait {
 201         struct completion completion;
 202         int ret;
 203 };
 204
 205 static inline void c4iw_init_wr_wait(struct c4iw_wr_wait *wr_waitp)
 206 {
 207         wr_waitp->ret = 0;
 208         init_completion(&wr_waitp->completion);
 209 }
 210
 211 static inline void c4iw_wake_up(struct c4iw_wr_wait *wr_waitp, int ret)
 212 {
 213         wr_waitp->ret = ret;
 214         complete(&wr_waitp->completion);
 215 }
 216
 217 static inline int c4iw_wait_for_reply(struct c4iw_rdev *rdev,
 218                                  struct c4iw_wr_wait *wr_waitp,
 219                                  u32 hwtid, u32 qpid,
 220                                  const char *func)
 221 {
 222         int ret;
 223
 224         if (c4iw_fatal_error(rdev)) {
 225                 wr_waitp->ret = -EIO;
 226                 goto out;
 227         }
 228
 229         ret = wait_for_completion_timeout(&wr_waitp->completion, C4IW_WR_TO);
 230         if (!ret) {
 231                 PDBG("%s - Device %s not responding (disabling device) - tid %u qpid %u\n",
 232                      func, pci_name(rdev->lldi.pdev), hwtid, qpid);
 233                 rdev->flags |= T4_FATAL_ERROR;
 234                 wr_waitp->ret = -EIO;
 235         }
 236 out:
 237         if (wr_waitp->ret)
 238                 PDBG("%s: FW reply %d tid %u qpid %u\n",
 239                      pci_name(rdev->lldi.pdev), wr_waitp->ret, hwtid, qpid);
 240         return wr_waitp->ret;
 241 }
 242
 243 enum db_state {
 244         NORMAL = 0,
 245         FLOW_CONTROL = 1,
 246         RECOVERY = 2,
 247         STOPPED = 3
 248 };
 249
 250 struct c4iw_dev {
 251         struct ib_device ibdev;
 252         struct c4iw_rdev rdev;
 253         u32 device_cap_flags;
 254         struct idr cqidr;
 255         struct idr qpidr;
 256         struct idr mmidr;
 257         spinlock_t lock;
 258         struct mutex db_mutex;
 259         struct dentry *debugfs_root;
 260         enum db_state db_state;
 261         struct idr hwtid_idr;
 262         struct idr atid_idr;
 263         struct idr stid_idr;
 264         struct list_head db_fc_list;
 265         u32 avail_ird;
 266         wait_queue_head_t wait;
 267 };
 268
 269 static inline struct c4iw_dev *to_c4iw_dev(struct ib_device *ibdev)
 270 {
 271         return container_of(ibdev, struct c4iw_dev, ibdev);
 272 }
 273
 274 static inline struct c4iw_dev *rdev_to_c4iw_dev(struct c4iw_rdev *rdev)
 275 {
 276         return container_of(rdev, struct c4iw_dev, rdev);
 277 }
 278
 279 static inline struct c4iw_cq *get_chp(struct c4iw_dev *rhp, u32 cqid)
 280 {
 281         return idr_find(&rhp->cqidr, cqid);
 282 }
 283
 284 static inline struct c4iw_qp *get_qhp(struct c4iw_dev *rhp, u32 qpid)
 285 {
 286         return idr_find(&rhp->qpidr, qpid);
 287 }
 288
 289 static inline struct c4iw_mr *get_mhp(struct c4iw_dev *rhp, u32 mmid)
 290 {
 291         return idr_find(&rhp->mmidr, mmid);
 292 }
 293
 294 static inline int _insert_handle(struct c4iw_dev *rhp, struct idr *idr,
 295                                  void *handle, u32 id, int lock)
 296 {
 297         int ret;
 298
 299         if (lock) {
 300                 idr_preload(GFP_KERNEL);
 301                 spin_lock_irq(&rhp->lock);
 302         }
 303
 304         ret = idr_alloc(idr, handle, id, id + 1, GFP_ATOMIC);
 305
 306         if (lock) {
 307                 spin_unlock_irq(&rhp->lock);
 308                 idr_preload_end();
 309         }
 310
 311         BUG_ON(ret == -ENOSPC);
 312         return ret < 0 ? ret : 0;
 313 }
 314
 315 static inline int insert_handle(struct c4iw_dev *rhp, struct idr *idr,
 316                                 void *handle, u32 id)
 317 {
 318         return _insert_handle(rhp, idr, handle, id, 1);
 319 }
 320
 321 static inline int insert_handle_nolock(struct c4iw_dev *rhp, struct idr *idr,
 322                                        void *handle, u32 id)
 323 {
 324         return _insert_handle(rhp, idr, handle, id, 0);
 325 }
 326
 327 static inline void _remove_handle(struct c4iw_dev *rhp, struct idr *idr,
 328                                    u32 id, int lock)
 329 {
 330         if (lock)
 331                 spin_lock_irq(&rhp->lock);
 332         idr_remove(idr, id);
 333         if (lock)
 334                 spin_unlock_irq(&rhp->lock);
 335 }
 336
 337 static inline void remove_handle(struct c4iw_dev *rhp, struct idr *idr, u32 id)
 338 {
 339         _remove_handle(rhp, idr, id, 1);
 340 }
 341
 342 static inline void remove_handle_nolock(struct c4iw_dev *rhp,
 343                                          struct idr *idr, u32 id)
 344 {
 345         _remove_handle(rhp, idr, id, 0);
 346 }
 347
 348 extern uint c4iw_max_read_depth;
 349
 350 static inline int cur_max_read_depth(struct c4iw_dev *dev)
 351 {
 352         return min(dev->rdev.lldi.max_ordird_qp, c4iw_max_read_depth);
 353 }
 354
 355 struct c4iw_pd {
 356         struct ib_pd ibpd;
 357         u32 pdid;
 358         struct c4iw_dev *rhp;
 359 };
 360
 361 static inline struct c4iw_pd *to_c4iw_pd(struct ib_pd *ibpd)
 362 {
 363         return container_of(ibpd, struct c4iw_pd, ibpd);
 364 }
 365
 366 struct tpt_attributes {
 367         u64 len;
 368         u64 va_fbo;
 369         enum fw_ri_mem_perms perms;
 370         u32 stag;
 371         u32 pdid;
 372         u32 qpid;
 373         u32 pbl_addr;
 374         u32 pbl_size;
 375         u32 state:1;
 376         u32 type:2;
 377         u32 rsvd:1;
 378         u32 remote_invaliate_disable:1;
 379         u32 zbva:1;
 380         u32 mw_bind_enable:1;
 381         u32 page_size:5;
 382 };
 383
 384 struct c4iw_mr {
 385         struct ib_mr ibmr;
 386         struct ib_umem *umem;
 387         struct c4iw_dev *rhp;
 388         struct sk_buff *dereg_skb;
 389         u64 kva;
 390         struct tpt_attributes attr;
 391         u64 *mpl;
 392         dma_addr_t mpl_addr;
 393         u32 max_mpl_len;
 394         u32 mpl_len;
 395 };
 396
 397 static inline struct c4iw_mr *to_c4iw_mr(struct ib_mr *ibmr)
 398 {
 399         return container_of(ibmr, struct c4iw_mr, ibmr);
 400 }
 401
 402 struct c4iw_mw {
 403         struct ib_mw ibmw;
 404         struct c4iw_dev *rhp;
 405         struct sk_buff *dereg_skb;
 406         u64 kva;
 407         struct tpt_attributes attr;
 408 };
 409
 410 static inline struct c4iw_mw *to_c4iw_mw(struct ib_mw *ibmw)
 411 {
 412         return container_of(ibmw, struct c4iw_mw, ibmw);
 413 }
 414
 415 struct c4iw_cq {
 416         struct ib_cq ibcq;
 417         struct c4iw_dev *rhp;
 418         struct sk_buff *destroy_skb;
 419         struct t4_cq cq;
 420         spinlock_t lock;
 421         spinlock_t comp_handler_lock;
 422         atomic_t refcnt;
 423         wait_queue_head_t wait;
 424 };
 425
 426 static inline struct c4iw_cq *to_c4iw_cq(struct ib_cq *ibcq)
 427 {
 428         return container_of(ibcq, struct c4iw_cq, ibcq);
 429 }
 430
 431 struct c4iw_mpa_attributes {
 432         u8 initiator;
 433         u8 recv_marker_enabled;
 434         u8 xmit_marker_enabled;
 435         u8 crc_enabled;
 436         u8 enhanced_rdma_conn;
 437         u8 version;
 438         u8 p2p_type;
 439 };
 440
 441 struct c4iw_qp_attributes {
 442         u32 scq;
 443         u32 rcq;
 444         u32 sq_num_entries;
 445         u32 rq_num_entries;
 446         u32 sq_max_sges;
 447         u32 sq_max_sges_rdma_write;
 448         u32 rq_max_sges;
 449         u32 state;
 450         u8 enable_rdma_read;
 451         u8 enable_rdma_write;
 452         u8 enable_bind;
 453         u8 enable_mmid0_fastreg;
 454         u32 max_ord;
 455         u32 max_ird;
 456         u32 pd;
 457         u32 next_state;
 458         char terminate_buffer[52];
 459         u32 terminate_msg_len;
 460         u8 is_terminate_local;
 461         struct c4iw_mpa_attributes mpa_attr;
 462         struct c4iw_ep *llp_stream_handle;
 463         u8 layer_etype;
 464         u8 ecode;
 465         u16 sq_db_inc;
 466         u16 rq_db_inc;
 467         u8 send_term;
 468 };
 469
 470 struct c4iw_qp {
 471         struct ib_qp ibqp;
 472         struct list_head db_fc_entry;
 473         struct c4iw_dev *rhp;
 474         struct c4iw_ep *ep;
 475         struct c4iw_qp_attributes attr;
 476         struct t4_wq wq;
 477         spinlock_t lock;
 478         struct mutex mutex;
 479         struct kref kref;
 480         wait_queue_head_t wait;
 481         struct timer_list timer;
 482         int sq_sig_all;
 483         struct completion rq_drained;
 484         struct completion sq_drained;
 485 };
 486
 487 static inline struct c4iw_qp *to_c4iw_qp(struct ib_qp *ibqp)
 488 {
 489         return container_of(ibqp, struct c4iw_qp, ibqp);
 490 }
 491
 492 struct c4iw_ucontext {
 493         struct ib_ucontext ibucontext;
 494         struct c4iw_dev_ucontext uctx;
 495         u32 key;
 496         spinlock_t mmap_lock;
 497         struct list_head mmaps;
 498 };
 499
 500 static inline struct c4iw_ucontext *to_c4iw_ucontext(struct ib_ucontext *c)
 501 {
 502         return container_of(c, struct c4iw_ucontext, ibucontext);
 503 }
 504
 505 struct c4iw_mm_entry {
 506         struct list_head entry;
 507         u64 addr;
 508         u32 key;
 509         unsigned len;
 510 };
 511
 512 static inline struct c4iw_mm_entry *remove_mmap(struct c4iw_ucontext *ucontext,
 513                                                 u32 key, unsigned len)
 514 {
 515         struct list_head *pos, *nxt;
 516         struct c4iw_mm_entry *mm;
 517
 518         spin_lock(&ucontext->mmap_lock);
 519         list_for_each_safe(pos, nxt, &ucontext->mmaps) {
 520
 521                 mm = list_entry(pos, struct c4iw_mm_entry, entry);
 522                 if (mm->key == key && mm->len == len) {
 523                         list_del_init(&mm->entry);
 524                         spin_unlock(&ucontext->mmap_lock);
 525                         PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
 526                              key, (unsigned long long) mm->addr, mm->len);
 527                         return mm;
 528                 }
 529         }
 530         spin_unlock(&ucontext->mmap_lock);
 531         return NULL;
 532 }
 533
 534 static inline void insert_mmap(struct c4iw_ucontext *ucontext,
 535                                struct c4iw_mm_entry *mm)
 536 {
 537         spin_lock(&ucontext->mmap_lock);
 538         PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
 539              mm->key, (unsigned long long) mm->addr, mm->len);
 540         list_add_tail(&mm->entry, &ucontext->mmaps);
 541         spin_unlock(&ucontext->mmap_lock);
 542 }
 543
 544 enum c4iw_qp_attr_mask {
 545         C4IW_QP_ATTR_NEXT_STATE = 1 << 0,
 546         C4IW_QP_ATTR_SQ_DB = 1<<1,
 547         C4IW_QP_ATTR_RQ_DB = 1<<2,
 548         C4IW_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
 549         C4IW_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
 550         C4IW_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
 551         C4IW_QP_ATTR_MAX_ORD = 1 << 11,
 552         C4IW_QP_ATTR_MAX_IRD = 1 << 12,
 553         C4IW_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
 554         C4IW_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
 555         C4IW_QP_ATTR_MPA_ATTR = 1 << 24,
 556         C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
 557         C4IW_QP_ATTR_VALID_MODIFY = (C4IW_QP_ATTR_ENABLE_RDMA_READ |
 558                                      C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
 559                                      C4IW_QP_ATTR_MAX_ORD |
 560                                      C4IW_QP_ATTR_MAX_IRD |
 561                                      C4IW_QP_ATTR_LLP_STREAM_HANDLE |
 562                                      C4IW_QP_ATTR_STREAM_MSG_BUFFER |
 563                                      C4IW_QP_ATTR_MPA_ATTR |
 564                                      C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE)
 565 };
 566
 567 int c4iw_modify_qp(struct c4iw_dev *rhp,
 568                                 struct c4iw_qp *qhp,
 569                                 enum c4iw_qp_attr_mask mask,
 570                                 struct c4iw_qp_attributes *attrs,
 571                                 int internal);
 572
 573 enum c4iw_qp_state {
 574         C4IW_QP_STATE_IDLE,
 575         C4IW_QP_STATE_RTS,
 576         C4IW_QP_STATE_ERROR,
 577         C4IW_QP_STATE_TERMINATE,
 578         C4IW_QP_STATE_CLOSING,
 579         C4IW_QP_STATE_TOT
 580 };
 581
 582 static inline int c4iw_convert_state(enum ib_qp_state ib_state)
 583 {
 584         switch (ib_state) {
 585         case IB_QPS_RESET:
 586         case IB_QPS_INIT:
 587                 return C4IW_QP_STATE_IDLE;
 588         case IB_QPS_RTS:
 589                 return C4IW_QP_STATE_RTS;
 590         case IB_QPS_SQD:
 591                 return C4IW_QP_STATE_CLOSING;
 592         case IB_QPS_SQE:
 593                 return C4IW_QP_STATE_TERMINATE;
 594         case IB_QPS_ERR:
 595                 return C4IW_QP_STATE_ERROR;
 596         default:
 597                 return -1;
 598         }
 599 }
 600
 601 static inline int to_ib_qp_state(int c4iw_qp_state)
 602 {
 603         switch (c4iw_qp_state) {
 604         case C4IW_QP_STATE_IDLE:
 605                 return IB_QPS_INIT;
 606         case C4IW_QP_STATE_RTS:
 607                 return IB_QPS_RTS;
 608         case C4IW_QP_STATE_CLOSING:
 609                 return IB_QPS_SQD;
 610         case C4IW_QP_STATE_TERMINATE:
 611                 return IB_QPS_SQE;
 612         case C4IW_QP_STATE_ERROR:
 613                 return IB_QPS_ERR;
 614         }
 615         return IB_QPS_ERR;
 616 }
 617
 618 static inline u32 c4iw_ib_to_tpt_access(int a)
 619 {
 620         return (a & IB_ACCESS_REMOTE_WRITE ? FW_RI_MEM_ACCESS_REM_WRITE : 0) |
 621                (a & IB_ACCESS_REMOTE_READ ? FW_RI_MEM_ACCESS_REM_READ : 0) |
 622                (a & IB_ACCESS_LOCAL_WRITE ? FW_RI_MEM_ACCESS_LOCAL_WRITE : 0) |
 623                FW_RI_MEM_ACCESS_LOCAL_READ;
 624 }
 625
 626 static inline u32 c4iw_ib_to_tpt_bind_access(int acc)
 627 {
 628         return (acc & IB_ACCESS_REMOTE_WRITE ? FW_RI_MEM_ACCESS_REM_WRITE : 0) |
 629                (acc & IB_ACCESS_REMOTE_READ ? FW_RI_MEM_ACCESS_REM_READ : 0);
 630 }
 631
 632 enum c4iw_mmid_state {
 633         C4IW_STAG_STATE_VALID,
 634         C4IW_STAG_STATE_INVALID
 635 };
 636
 637 #define C4IW_NODE_DESC "cxgb4 Chelsio Communications"
 638
 639 #define MPA_KEY_REQ "MPA ID Req Frame"
 640 #define MPA_KEY_REP "MPA ID Rep Frame"
 641
 642 #define MPA_MAX_PRIVATE_DATA    256
 643 #define MPA_ENHANCED_RDMA_CONN  0x10
 644 #define MPA_REJECT              0x20
 645 #define MPA_CRC                 0x40
 646 #define MPA_MARKERS             0x80
 647 #define MPA_FLAGS_MASK          0xE0
 648
 649 #define MPA_V2_PEER2PEER_MODEL          0x8000
 650 #define MPA_V2_ZERO_LEN_FPDU_RTR        0x4000
 651 #define MPA_V2_RDMA_WRITE_RTR           0x8000
 652 #define MPA_V2_RDMA_READ_RTR            0x4000
 653 #define MPA_V2_IRD_ORD_MASK             0x3FFF
 654
 655 #define c4iw_put_ep(ep) { \
 656         PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __func__, __LINE__,  \
 657              ep, atomic_read(&((ep)->kref.refcount))); \
 658         WARN_ON(atomic_read(&((ep)->kref.refcount)) < 1); \
 659         kref_put(&((ep)->kref), _c4iw_free_ep); \
 660 }
 661
 662 #define c4iw_get_ep(ep) { \
 663         PDBG("get_ep (via %s:%u) ep %p, refcnt %d\n", __func__, __LINE__, \
 664              ep, atomic_read(&((ep)->kref.refcount))); \
 665         kref_get(&((ep)->kref));  \
 666 }
 667 void _c4iw_free_ep(struct kref *kref);
 668
 669 struct mpa_message {
 670         u8 key[16];
 671         u8 flags;
 672         u8 revision;
 673         __be16 private_data_size;
 674         u8 private_data[0];
 675 };
 676
 677 struct mpa_v2_conn_params {
 678         __be16 ird;
 679         __be16 ord;
 680 };
 681
 682 struct terminate_message {
 683         u8 layer_etype;
 684         u8 ecode;
 685         __be16 hdrct_rsvd;
 686         u8 len_hdrs[0];
 687 };
 688
 689 #define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
 690
 691 enum c4iw_layers_types {
 692         LAYER_RDMAP             = 0x00,
 693         LAYER_DDP               = 0x10,
 694         LAYER_MPA               = 0x20,
 695         RDMAP_LOCAL_CATA        = 0x00,
 696         RDMAP_REMOTE_PROT       = 0x01,
 697         RDMAP_REMOTE_OP         = 0x02,
 698         DDP_LOCAL_CATA          = 0x00,
 699         DDP_TAGGED_ERR          = 0x01,
 700         DDP_UNTAGGED_ERR        = 0x02,
 701         DDP_LLP                 = 0x03
 702 };
 703
 704 enum c4iw_rdma_ecodes {
 705         RDMAP_INV_STAG          = 0x00,
 706         RDMAP_BASE_BOUNDS       = 0x01,
 707         RDMAP_ACC_VIOL          = 0x02,
 708         RDMAP_STAG_NOT_ASSOC    = 0x03,
 709         RDMAP_TO_WRAP           = 0x04,
 710         RDMAP_INV_VERS          = 0x05,
 711         RDMAP_INV_OPCODE        = 0x06,
 712         RDMAP_STREAM_CATA       = 0x07,
 713         RDMAP_GLOBAL_CATA       = 0x08,
 714         RDMAP_CANT_INV_STAG     = 0x09,
 715         RDMAP_UNSPECIFIED       = 0xff
 716 };
 717
 718 enum c4iw_ddp_ecodes {
 719         DDPT_INV_STAG           = 0x00,
 720         DDPT_BASE_BOUNDS        = 0x01,
 721         DDPT_STAG_NOT_ASSOC     = 0x02,
 722         DDPT_TO_WRAP            = 0x03,
 723         DDPT_INV_VERS           = 0x04,
 724         DDPU_INV_QN             = 0x01,
 725         DDPU_INV_MSN_NOBUF      = 0x02,
 726         DDPU_INV_MSN_RANGE      = 0x03,
 727         DDPU_INV_MO             = 0x04,
 728         DDPU_MSG_TOOBIG         = 0x05,
 729         DDPU_INV_VERS           = 0x06
 730 };
 731
 732 enum c4iw_mpa_ecodes {
 733         MPA_CRC_ERR             = 0x02,
 734         MPA_MARKER_ERR          = 0x03,
 735         MPA_LOCAL_CATA          = 0x05,
 736         MPA_INSUFF_IRD          = 0x06,
 737         MPA_NOMATCH_RTR         = 0x07,
 738 };
 739
 740 enum c4iw_ep_state {
 741         IDLE = 0,
 742         LISTEN,
 743         CONNECTING,
 744         MPA_REQ_WAIT,
 745         MPA_REQ_SENT,
 746         MPA_REQ_RCVD,
 747         MPA_REP_SENT,
 748         FPDU_MODE,
 749         ABORTING,
 750         CLOSING,
 751         MORIBUND,
 752         DEAD,
 753 };
 754
 755 enum c4iw_ep_flags {
 756         PEER_ABORT_IN_PROGRESS  = 0,
 757         ABORT_REQ_IN_PROGRESS   = 1,
 758         RELEASE_RESOURCES       = 2,
 759         CLOSE_SENT              = 3,
 760         TIMEOUT                 = 4,
 761         QP_REFERENCED           = 5,
 762         STOP_MPA_TIMER          = 7,
 763 };
 764
 765 enum c4iw_ep_history {
 766         ACT_OPEN_REQ            = 0,
 767         ACT_OFLD_CONN           = 1,
 768         ACT_OPEN_RPL            = 2,
 769         ACT_ESTAB               = 3,
 770         PASS_ACCEPT_REQ         = 4,
 771         PASS_ESTAB              = 5,
 772         ABORT_UPCALL            = 6,
 773         ESTAB_UPCALL            = 7,
 774         CLOSE_UPCALL            = 8,
 775         ULP_ACCEPT              = 9,
 776         ULP_REJECT              = 10,
 777         TIMEDOUT                = 11,
 778         PEER_ABORT              = 12,
 779         PEER_CLOSE              = 13,
 780         CONNREQ_UPCALL          = 14,
 781         ABORT_CONN              = 15,
 782         DISCONN_UPCALL          = 16,
 783         EP_DISC_CLOSE           = 17,
 784         EP_DISC_ABORT           = 18,
 785         CONN_RPL_UPCALL         = 19,
 786         ACT_RETRY_NOMEM         = 20,
 787         ACT_RETRY_INUSE         = 21,
 788         CLOSE_CON_RPL           = 22,
 789         EP_DISC_FAIL            = 24,
 790         QP_REFED                = 25,
 791         QP_DEREFED              = 26,
 792         CM_ID_REFED             = 27,
 793         CM_ID_DEREFED           = 28,
 794 };
 795
 796 enum conn_pre_alloc_buffers {
 797         CN_ABORT_REQ_BUF,
 798         CN_ABORT_RPL_BUF,
 799         CN_CLOSE_CON_REQ_BUF,
 800         CN_DESTROY_BUF,
 801         CN_FLOWC_BUF,
 802         CN_MAX_CON_BUF
 803 };
 804
 805 #define FLOWC_LEN 80
 806 union cpl_wr_size {
 807         struct cpl_abort_req abrt_req;
 808         struct cpl_abort_rpl abrt_rpl;
 809         struct fw_ri_wr ri_req;
 810         struct cpl_close_con_req close_req;
 811         char flowc_buf[FLOWC_LEN];
 812 };
 813
 814 struct c4iw_ep_common {
 815         struct iw_cm_id *cm_id;
 816         struct c4iw_qp *qp;
 817         struct c4iw_dev *dev;
 818         struct sk_buff_head ep_skb_list;
 819         enum c4iw_ep_state state;
 820         struct kref kref;
 821         struct mutex mutex;
 822         struct sockaddr_storage local_addr;
 823         struct sockaddr_storage remote_addr;
 824         struct c4iw_wr_wait wr_wait;
 825         unsigned long flags;
 826         unsigned long history;
 827 };
 828
 829 struct c4iw_listen_ep {
 830         struct c4iw_ep_common com;
 831         unsigned int stid;
 832         int backlog;
 833 };
 834
 835 struct c4iw_ep_stats {
 836         unsigned connect_neg_adv;
 837         unsigned abort_neg_adv;
 838 };
 839
 840 struct c4iw_ep {
 841         struct c4iw_ep_common com;
 842         struct c4iw_ep *parent_ep;
 843         struct timer_list timer;
 844         struct list_head entry;
 845         unsigned int atid;
 846         u32 hwtid;
 847         u32 snd_seq;
 848         u32 rcv_seq;
 849         struct l2t_entry *l2t;
 850         struct dst_entry *dst;
 851         struct sk_buff *mpa_skb;
 852         struct c4iw_mpa_attributes mpa_attr;
 853         u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
 854         unsigned int mpa_pkt_len;
 855         u32 ird;
 856         u32 ord;
 857         u32 smac_idx;
 858         u32 tx_chan;
 859         u32 mtu;
 860         u16 mss;
 861         u16 emss;
 862         u16 plen;
 863         u16 rss_qid;
 864         u16 txq_idx;
 865         u16 ctrlq_idx;
 866         u8 tos;
 867         u8 retry_with_mpa_v1;
 868         u8 tried_with_mpa_v1;
 869         unsigned int retry_count;
 870         int snd_win;
 871         int rcv_win;
 872         struct c4iw_ep_stats stats;
 873 };
 874
 875 static inline struct c4iw_ep *to_ep(struct iw_cm_id *cm_id)
 876 {
 877         return cm_id->provider_data;
 878 }
 879
 880 static inline struct c4iw_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
 881 {
 882         return cm_id->provider_data;
 883 }
 884
 885 static inline int ocqp_supported(const struct cxgb4_lld_info *infop)
 886 {
 887 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64)
 888         return infop->vr->ocq.size > 0;
 889 #else
 890         return 0;
 891 #endif
 892 }
 893
 894 u32 c4iw_id_alloc(struct c4iw_id_table *alloc);
 895 void c4iw_id_free(struct c4iw_id_table *alloc, u32 obj);
 896 int c4iw_id_table_alloc(struct c4iw_id_table *alloc, u32 start, u32 num,
 897                         u32 reserved, u32 flags);
 898 void c4iw_id_table_free(struct c4iw_id_table *alloc);
 899
 900 typedef int (*c4iw_handler_func)(struct c4iw_dev *dev, struct sk_buff *skb);
 901
 902 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
 903                      struct l2t_entry *l2t);
 904 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qpid,
 905                    struct c4iw_dev_ucontext *uctx);
 906 u32 c4iw_get_resource(struct c4iw_id_table *id_table);
 907 void c4iw_put_resource(struct c4iw_id_table *id_table, u32 entry);
 908 int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt, u32 nr_pdid);
 909 int c4iw_init_ctrl_qp(struct c4iw_rdev *rdev);
 910 int c4iw_pblpool_create(struct c4iw_rdev *rdev);
 911 int c4iw_rqtpool_create(struct c4iw_rdev *rdev);
 912 int c4iw_ocqp_pool_create(struct c4iw_rdev *rdev);
 913 void c4iw_pblpool_destroy(struct c4iw_rdev *rdev);
 914 void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev);
 915 void c4iw_ocqp_pool_destroy(struct c4iw_rdev *rdev);
 916 void c4iw_destroy_resource(struct c4iw_resource *rscp);
 917 int c4iw_destroy_ctrl_qp(struct c4iw_rdev *rdev);
 918 int c4iw_register_device(struct c4iw_dev *dev);
 919 void c4iw_unregister_device(struct c4iw_dev *dev);
 920 int __init c4iw_cm_init(void);
 921 void c4iw_cm_term(void);
 922 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
 923                                struct c4iw_dev_ucontext *uctx);
 924 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
 925                             struct c4iw_dev_ucontext *uctx);
 926 int c4iw_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 927 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 928                       struct ib_send_wr **bad_wr);
 929 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 930                       struct ib_recv_wr **bad_wr);
 931 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 932 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog);
 933 int c4iw_destroy_listen(struct iw_cm_id *cm_id);
 934 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 935 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
 936 void c4iw_qp_add_ref(struct ib_qp *qp);
 937 void c4iw_qp_rem_ref(struct ib_qp *qp);
 938 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd,
 939                             enum ib_mr_type mr_type,
 940                             u32 max_num_sg);
 941 int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 942                    unsigned int *sg_offset);
 943 int c4iw_dealloc_mw(struct ib_mw *mw);
 944 struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type,
 945                             struct ib_udata *udata);
 946 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start,
 947                                            u64 length, u64 virt, int acc,
 948                                            struct ib_udata *udata);
 949 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc);
 950 int c4iw_dereg_mr(struct ib_mr *ib_mr);
 951 int c4iw_destroy_cq(struct ib_cq *ib_cq);
 952 struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 953                              const struct ib_cq_init_attr *attr,
 954                              struct ib_ucontext *ib_context,
 955                              struct ib_udata *udata);
 956 int c4iw_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata);
 957 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
 958 int c4iw_destroy_qp(struct ib_qp *ib_qp);
 959 struct ib_qp *c4iw_create_qp(struct ib_pd *pd,
 960                              struct ib_qp_init_attr *attrs,
 961                              struct ib_udata *udata);
 962 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 963                                  int attr_mask, struct ib_udata *udata);
 964 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 965                      int attr_mask, struct ib_qp_init_attr *init_attr);
 966 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn);
 967 u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size);
 968 void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
 969 u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size);
 970 void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
 971 u32 c4iw_ocqp_pool_alloc(struct c4iw_rdev *rdev, int size);
 972 void c4iw_ocqp_pool_free(struct c4iw_rdev *rdev, u32 addr, int size);
 973 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb);
 974 void c4iw_flush_hw_cq(struct c4iw_cq *chp);
 975 void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count);
 976 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp);
 977 int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count);
 978 int c4iw_flush_sq(struct c4iw_qp *qhp);
 979 int c4iw_ev_handler(struct c4iw_dev *rnicp, u32 qid);
 980 u16 c4iw_rqes_posted(struct c4iw_qp *qhp);
 981 int c4iw_post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe);
 982 u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
 983 void c4iw_put_cqid(struct c4iw_rdev *rdev, u32 qid,
 984                 struct c4iw_dev_ucontext *uctx);
 985 u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
 986 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qid,
 987                 struct c4iw_dev_ucontext *uctx);
 988 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe);
 989
 990 extern struct cxgb4_client t4c_client;
 991 extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS];
 992 void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid,
 993                               enum cxgb4_bar2_qtype qtype,
 994                               unsigned int *pbar2_qid, u64 *pbar2_pa);
 995 extern void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe);
 996 extern int c4iw_wr_log;
 997 extern int db_fc_threshold;
 998 extern int db_coalescing_threshold;
 999 extern int use_dsgl;
1000 void c4iw_drain_rq(struct ib_qp *qp);
1001 void c4iw_drain_sq(struct ib_qp *qp);
1002
1003
1004 #endif