drivers/net/ethernet/qlogic/qed/qed_iwarp.c

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   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  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <linux/if_ether.h>
  33 #include <linux/if_vlan.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/tcp.h>
  38 #include "qed_cxt.h"
  39 #include "qed_hw.h"
  40 #include "qed_ll2.h"
  41 #include "qed_rdma.h"
  42 #include "qed_reg_addr.h"
  43 #include "qed_sp.h"
  44
  45 #define QED_IWARP_ORD_DEFAULT           32
  46 #define QED_IWARP_IRD_DEFAULT           32
  47 #define QED_IWARP_MAX_FW_MSS            4120
  48
  49 #define QED_EP_SIG 0xecabcdef
  50
  51 struct mpa_v2_hdr {
  52         __be16 ird;
  53         __be16 ord;
  54 };
  55
  56 #define MPA_V2_PEER2PEER_MODEL  0x8000
  57 #define MPA_V2_SEND_RTR         0x4000  /* on ird */
  58 #define MPA_V2_READ_RTR         0x4000  /* on ord */
  59 #define MPA_V2_WRITE_RTR        0x8000
  60 #define MPA_V2_IRD_ORD_MASK     0x3FFF
  61
  62 #define MPA_REV2(_mpa_rev) ((_mpa_rev) == MPA_NEGOTIATION_TYPE_ENHANCED)
  63
  64 #define QED_IWARP_INVALID_TCP_CID       0xffffffff
  65 #define QED_IWARP_RCV_WND_SIZE_DEF      (256 * 1024)
  66 #define QED_IWARP_RCV_WND_SIZE_MIN      (64 * 1024)
  67 #define TIMESTAMP_HEADER_SIZE           (12)
  68
  69 #define QED_IWARP_TS_EN                 BIT(0)
  70 #define QED_IWARP_DA_EN                 BIT(1)
  71 #define QED_IWARP_PARAM_CRC_NEEDED      (1)
  72 #define QED_IWARP_PARAM_P2P             (1)
  73
  74 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
  75                                  u8 fw_event_code, u16 echo,
  76                                  union event_ring_data *data,
  77                                  u8 fw_return_code);
  78
  79 /* Override devinfo with iWARP specific values */
  80 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
  81 {
  82         struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;
  83
  84         dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
  85         dev->max_qp = min_t(u32,
  86                             IWARP_MAX_QPS,
  87                             p_hwfn->p_rdma_info->num_qps) -
  88                       QED_IWARP_PREALLOC_CNT;
  89
  90         dev->max_cq = dev->max_qp;
  91
  92         dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
  93         dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
  94 }
  95
  96 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
  97 {
  98         p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
  99         qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
 100         p_hwfn->b_rdma_enabled_in_prs = true;
 101 }
 102
 103 /* We have two cid maps, one for tcp which should be used only from passive
 104  * syn processing and replacing a pre-allocated ep in the list. The second
 105  * for active tcp and for QPs.
 106  */
 107 static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
 108 {
 109         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 110
 111         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 112
 113         if (cid < QED_IWARP_PREALLOC_CNT)
 114                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
 115                                     cid);
 116         else
 117                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 118
 119         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 120 }
 121
 122 static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 123 {
 124         int rc;
 125
 126         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 127         rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 128         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 129         if (rc) {
 130                 DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
 131                 return rc;
 132         }
 133         *cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 134
 135         rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
 136         if (rc)
 137                 qed_iwarp_cid_cleaned(p_hwfn, *cid);
 138
 139         return rc;
 140 }
 141
 142 static void qed_iwarp_set_tcp_cid(struct qed_hwfn *p_hwfn, u32 cid)
 143 {
 144         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 145
 146         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 147         qed_bmap_set_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 148         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 149 }
 150
 151 /* This function allocates a cid for passive tcp (called from syn receive)
 152  * the reason it's separate from the regular cid allocation is because it
 153  * is assured that these cids already have ilt allocated. They are preallocated
 154  * to ensure that we won't need to allocate memory during syn processing
 155  */
 156 static int qed_iwarp_alloc_tcp_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 157 {
 158         int rc;
 159
 160         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 161
 162         rc = qed_rdma_bmap_alloc_id(p_hwfn,
 163                                     &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 164
 165         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 166
 167         if (rc) {
 168                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 169                            "can't allocate iwarp tcp cid max-count=%d\n",
 170                            p_hwfn->p_rdma_info->tcp_cid_map.max_count);
 171
 172                 *cid = QED_IWARP_INVALID_TCP_CID;
 173                 return rc;
 174         }
 175
 176         *cid += qed_cxt_get_proto_cid_start(p_hwfn,
 177                                             p_hwfn->p_rdma_info->proto);
 178         return 0;
 179 }
 180
 181 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
 182                         struct qed_rdma_qp *qp,
 183                         struct qed_rdma_create_qp_out_params *out_params)
 184 {
 185         struct iwarp_create_qp_ramrod_data *p_ramrod;
 186         struct qed_sp_init_data init_data;
 187         struct qed_spq_entry *p_ent;
 188         u16 physical_queue;
 189         u32 cid;
 190         int rc;
 191
 192         qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 193                                               IWARP_SHARED_QUEUE_PAGE_SIZE,
 194                                               &qp->shared_queue_phys_addr,
 195                                               GFP_KERNEL);
 196         if (!qp->shared_queue)
 197                 return -ENOMEM;
 198
 199         out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
 200             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 201         out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
 202             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 203         out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
 204             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 205         out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
 206             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 207
 208         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
 209         if (rc)
 210                 goto err1;
 211
 212         qp->icid = (u16)cid;
 213
 214         memset(&init_data, 0, sizeof(init_data));
 215         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 216         init_data.cid = qp->icid;
 217         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 218
 219         rc = qed_sp_init_request(p_hwfn, &p_ent,
 220                                  IWARP_RAMROD_CMD_ID_CREATE_QP,
 221                                  PROTOCOLID_IWARP, &init_data);
 222         if (rc)
 223                 goto err2;
 224
 225         p_ramrod = &p_ent->ramrod.iwarp_create_qp;
 226
 227         SET_FIELD(p_ramrod->flags,
 228                   IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
 229                   qp->fmr_and_reserved_lkey);
 230
 231         SET_FIELD(p_ramrod->flags,
 232                   IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);
 233
 234         SET_FIELD(p_ramrod->flags,
 235                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
 236                   qp->incoming_rdma_read_en);
 237
 238         SET_FIELD(p_ramrod->flags,
 239                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
 240                   qp->incoming_rdma_write_en);
 241
 242         SET_FIELD(p_ramrod->flags,
 243                   IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
 244                   qp->incoming_atomic_en);
 245
 246         SET_FIELD(p_ramrod->flags,
 247                   IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);
 248
 249         p_ramrod->pd = qp->pd;
 250         p_ramrod->sq_num_pages = qp->sq_num_pages;
 251         p_ramrod->rq_num_pages = qp->rq_num_pages;
 252
 253         p_ramrod->qp_handle_for_cqe.hi = cpu_to_le32(qp->qp_handle.hi);
 254         p_ramrod->qp_handle_for_cqe.lo = cpu_to_le32(qp->qp_handle.lo);
 255
 256         p_ramrod->cq_cid_for_sq =
 257             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
 258         p_ramrod->cq_cid_for_rq =
 259             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);
 260
 261         p_ramrod->dpi = cpu_to_le16(qp->dpi);
 262
 263         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 264         p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
 265         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 266         p_ramrod->physical_q1 = cpu_to_le16(physical_queue);
 267
 268         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 269         if (rc)
 270                 goto err2;
 271
 272         return rc;
 273
 274 err2:
 275         qed_iwarp_cid_cleaned(p_hwfn, cid);
 276 err1:
 277         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 278                           IWARP_SHARED_QUEUE_PAGE_SIZE,
 279                           qp->shared_queue, qp->shared_queue_phys_addr);
 280
 281         return rc;
 282 }
 283
 284 static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 285 {
 286         struct iwarp_modify_qp_ramrod_data *p_ramrod;
 287         struct qed_sp_init_data init_data;
 288         struct qed_spq_entry *p_ent;
 289         int rc;
 290
 291         /* Get SPQ entry */
 292         memset(&init_data, 0, sizeof(init_data));
 293         init_data.cid = qp->icid;
 294         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 295         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 296
 297         rc = qed_sp_init_request(p_hwfn, &p_ent,
 298                                  IWARP_RAMROD_CMD_ID_MODIFY_QP,
 299                                  p_hwfn->p_rdma_info->proto, &init_data);
 300         if (rc)
 301                 return rc;
 302
 303         p_ramrod = &p_ent->ramrod.iwarp_modify_qp;
 304         SET_FIELD(p_ramrod->flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN,
 305                   0x1);
 306         if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
 307                 p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
 308         else
 309                 p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_ERROR;
 310
 311         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 312
 313         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);
 314
 315         return rc;
 316 }
 317
 318 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
 319 {
 320         switch (state) {
 321         case QED_ROCE_QP_STATE_RESET:
 322         case QED_ROCE_QP_STATE_INIT:
 323         case QED_ROCE_QP_STATE_RTR:
 324                 return QED_IWARP_QP_STATE_IDLE;
 325         case QED_ROCE_QP_STATE_RTS:
 326                 return QED_IWARP_QP_STATE_RTS;
 327         case QED_ROCE_QP_STATE_SQD:
 328                 return QED_IWARP_QP_STATE_CLOSING;
 329         case QED_ROCE_QP_STATE_ERR:
 330                 return QED_IWARP_QP_STATE_ERROR;
 331         case QED_ROCE_QP_STATE_SQE:
 332                 return QED_IWARP_QP_STATE_TERMINATE;
 333         default:
 334                 return QED_IWARP_QP_STATE_ERROR;
 335         }
 336 }
 337
 338 static enum qed_roce_qp_state
 339 qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
 340 {
 341         switch (state) {
 342         case QED_IWARP_QP_STATE_IDLE:
 343                 return QED_ROCE_QP_STATE_INIT;
 344         case QED_IWARP_QP_STATE_RTS:
 345                 return QED_ROCE_QP_STATE_RTS;
 346         case QED_IWARP_QP_STATE_TERMINATE:
 347                 return QED_ROCE_QP_STATE_SQE;
 348         case QED_IWARP_QP_STATE_CLOSING:
 349                 return QED_ROCE_QP_STATE_SQD;
 350         case QED_IWARP_QP_STATE_ERROR:
 351                 return QED_ROCE_QP_STATE_ERR;
 352         default:
 353                 return QED_ROCE_QP_STATE_ERR;
 354         }
 355 }
 356
 357 const char *iwarp_state_names[] = {
 358         "IDLE",
 359         "RTS",
 360         "TERMINATE",
 361         "CLOSING",
 362         "ERROR",
 363 };
 364
 365 int
 366 qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
 367                     struct qed_rdma_qp *qp,
 368                     enum qed_iwarp_qp_state new_state, bool internal)
 369 {
 370         enum qed_iwarp_qp_state prev_iw_state;
 371         bool modify_fw = false;
 372         int rc = 0;
 373
 374         /* modify QP can be called from upper-layer or as a result of async
 375          * RST/FIN... therefore need to protect
 376          */
 377         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 378         prev_iw_state = qp->iwarp_state;
 379
 380         if (prev_iw_state == new_state) {
 381                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 382                 return 0;
 383         }
 384
 385         switch (prev_iw_state) {
 386         case QED_IWARP_QP_STATE_IDLE:
 387                 switch (new_state) {
 388                 case QED_IWARP_QP_STATE_RTS:
 389                         qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
 390                         break;
 391                 case QED_IWARP_QP_STATE_ERROR:
 392                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 393                         if (!internal)
 394                                 modify_fw = true;
 395                         break;
 396                 default:
 397                         break;
 398                 }
 399                 break;
 400         case QED_IWARP_QP_STATE_RTS:
 401                 switch (new_state) {
 402                 case QED_IWARP_QP_STATE_CLOSING:
 403                         if (!internal)
 404                                 modify_fw = true;
 405
 406                         qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
 407                         break;
 408                 case QED_IWARP_QP_STATE_ERROR:
 409                         if (!internal)
 410                                 modify_fw = true;
 411                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 412                         break;
 413                 default:
 414                         break;
 415                 }
 416                 break;
 417         case QED_IWARP_QP_STATE_ERROR:
 418                 switch (new_state) {
 419                 case QED_IWARP_QP_STATE_IDLE:
 420
 421                         qp->iwarp_state = new_state;
 422                         break;
 423                 case QED_IWARP_QP_STATE_CLOSING:
 424                         /* could happen due to race... do nothing.... */
 425                         break;
 426                 default:
 427                         rc = -EINVAL;
 428                 }
 429                 break;
 430         case QED_IWARP_QP_STATE_TERMINATE:
 431         case QED_IWARP_QP_STATE_CLOSING:
 432                 qp->iwarp_state = new_state;
 433                 break;
 434         default:
 435                 break;
 436         }
 437
 438         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
 439                    qp->icid,
 440                    iwarp_state_names[prev_iw_state],
 441                    iwarp_state_names[qp->iwarp_state],
 442                    internal ? "internal" : "");
 443
 444         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 445
 446         if (modify_fw)
 447                 rc = qed_iwarp_modify_fw(p_hwfn, qp);
 448
 449         return rc;
 450 }
 451
 452 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 453 {
 454         struct qed_sp_init_data init_data;
 455         struct qed_spq_entry *p_ent;
 456         int rc;
 457
 458         /* Get SPQ entry */
 459         memset(&init_data, 0, sizeof(init_data));
 460         init_data.cid = qp->icid;
 461         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 462         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 463
 464         rc = qed_sp_init_request(p_hwfn, &p_ent,
 465                                  IWARP_RAMROD_CMD_ID_DESTROY_QP,
 466                                  p_hwfn->p_rdma_info->proto, &init_data);
 467         if (rc)
 468                 return rc;
 469
 470         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 471
 472         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);
 473
 474         return rc;
 475 }
 476
 477 static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
 478                                  struct qed_iwarp_ep *ep,
 479                                  bool remove_from_active_list)
 480 {
 481         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 482                           sizeof(*ep->ep_buffer_virt),
 483                           ep->ep_buffer_virt, ep->ep_buffer_phys);
 484
 485         if (remove_from_active_list) {
 486                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 487                 list_del(&ep->list_entry);
 488                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 489         }
 490
 491         if (ep->qp)
 492                 ep->qp->ep = NULL;
 493
 494         kfree(ep);
 495 }
 496
 497 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 498 {
 499         struct qed_iwarp_ep *ep = qp->ep;
 500         int wait_count = 0;
 501         int rc = 0;
 502
 503         if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
 504                 rc = qed_iwarp_modify_qp(p_hwfn, qp,
 505                                          QED_IWARP_QP_STATE_ERROR, false);
 506                 if (rc)
 507                         return rc;
 508         }
 509
 510         /* Make sure ep is closed before returning and freeing memory. */
 511         if (ep) {
 512                 while (READ_ONCE(ep->state) != QED_IWARP_EP_CLOSED &&
 513                        wait_count++ < 200)
 514                         msleep(100);
 515
 516                 if (ep->state != QED_IWARP_EP_CLOSED)
 517                         DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
 518                                   ep->state);
 519
 520                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
 521         }
 522
 523         rc = qed_iwarp_fw_destroy(p_hwfn, qp);
 524
 525         if (qp->shared_queue)
 526                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 527                                   IWARP_SHARED_QUEUE_PAGE_SIZE,
 528                                   qp->shared_queue, qp->shared_queue_phys_addr);
 529
 530         return rc;
 531 }
 532
 533 static int
 534 qed_iwarp_create_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep **ep_out)
 535 {
 536         struct qed_iwarp_ep *ep;
 537         int rc;
 538
 539         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
 540         if (!ep)
 541                 return -ENOMEM;
 542
 543         ep->state = QED_IWARP_EP_INIT;
 544
 545         ep->ep_buffer_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 546                                                 sizeof(*ep->ep_buffer_virt),
 547                                                 &ep->ep_buffer_phys,
 548                                                 GFP_KERNEL);
 549         if (!ep->ep_buffer_virt) {
 550                 rc = -ENOMEM;
 551                 goto err;
 552         }
 553
 554         ep->sig = QED_EP_SIG;
 555
 556         *ep_out = ep;
 557
 558         return 0;
 559
 560 err:
 561         kfree(ep);
 562         return rc;
 563 }
 564
 565 static void
 566 qed_iwarp_print_tcp_ramrod(struct qed_hwfn *p_hwfn,
 567                            struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod)
 568 {
 569         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "local_mac=%x %x %x, remote_mac=%x %x %x\n",
 570                    p_tcp_ramrod->tcp.local_mac_addr_lo,
 571                    p_tcp_ramrod->tcp.local_mac_addr_mid,
 572                    p_tcp_ramrod->tcp.local_mac_addr_hi,
 573                    p_tcp_ramrod->tcp.remote_mac_addr_lo,
 574                    p_tcp_ramrod->tcp.remote_mac_addr_mid,
 575                    p_tcp_ramrod->tcp.remote_mac_addr_hi);
 576
 577         if (p_tcp_ramrod->tcp.ip_version == TCP_IPV4) {
 578                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 579                            "local_ip=%pI4h:%x, remote_ip=%pI4h:%x, vlan=%x\n",
 580                            p_tcp_ramrod->tcp.local_ip,
 581                            p_tcp_ramrod->tcp.local_port,
 582                            p_tcp_ramrod->tcp.remote_ip,
 583                            p_tcp_ramrod->tcp.remote_port,
 584                            p_tcp_ramrod->tcp.vlan_id);
 585         } else {
 586                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 587                            "local_ip=%pI6:%x, remote_ip=%pI6:%x, vlan=%x\n",
 588                            p_tcp_ramrod->tcp.local_ip,
 589                            p_tcp_ramrod->tcp.local_port,
 590                            p_tcp_ramrod->tcp.remote_ip,
 591                            p_tcp_ramrod->tcp.remote_port,
 592                            p_tcp_ramrod->tcp.vlan_id);
 593         }
 594
 595         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 596                    "flow_label=%x, ttl=%x, tos_or_tc=%x, mss=%x, rcv_wnd_scale=%x, connect_mode=%x, flags=%x\n",
 597                    p_tcp_ramrod->tcp.flow_label,
 598                    p_tcp_ramrod->tcp.ttl,
 599                    p_tcp_ramrod->tcp.tos_or_tc,
 600                    p_tcp_ramrod->tcp.mss,
 601                    p_tcp_ramrod->tcp.rcv_wnd_scale,
 602                    p_tcp_ramrod->tcp.connect_mode,
 603                    p_tcp_ramrod->tcp.flags);
 604
 605         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "syn_ip_payload_length=%x, lo=%x, hi=%x\n",
 606                    p_tcp_ramrod->tcp.syn_ip_payload_length,
 607                    p_tcp_ramrod->tcp.syn_phy_addr_lo,
 608                    p_tcp_ramrod->tcp.syn_phy_addr_hi);
 609 }
 610
 611 static int
 612 qed_iwarp_tcp_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 613 {
 614         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 615         struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod;
 616         struct tcp_offload_params_opt2 *tcp;
 617         struct qed_sp_init_data init_data;
 618         struct qed_spq_entry *p_ent;
 619         dma_addr_t async_output_phys;
 620         dma_addr_t in_pdata_phys;
 621         u16 physical_q;
 622         u8 tcp_flags;
 623         int rc;
 624         int i;
 625
 626         memset(&init_data, 0, sizeof(init_data));
 627         init_data.cid = ep->tcp_cid;
 628         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 629         if (ep->connect_mode == TCP_CONNECT_PASSIVE)
 630                 init_data.comp_mode = QED_SPQ_MODE_CB;
 631         else
 632                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 633
 634         rc = qed_sp_init_request(p_hwfn, &p_ent,
 635                                  IWARP_RAMROD_CMD_ID_TCP_OFFLOAD,
 636                                  PROTOCOLID_IWARP, &init_data);
 637         if (rc)
 638                 return rc;
 639
 640         p_tcp_ramrod = &p_ent->ramrod.iwarp_tcp_offload;
 641
 642         in_pdata_phys = ep->ep_buffer_phys +
 643                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 644         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.incoming_ulp_buffer.addr,
 645                        in_pdata_phys);
 646
 647         p_tcp_ramrod->iwarp.incoming_ulp_buffer.len =
 648             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 649
 650         async_output_phys = ep->ep_buffer_phys +
 651                             offsetof(struct qed_iwarp_ep_memory, async_output);
 652         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.async_eqe_output_buf,
 653                        async_output_phys);
 654
 655         p_tcp_ramrod->iwarp.handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 656         p_tcp_ramrod->iwarp.handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 657
 658         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 659         p_tcp_ramrod->iwarp.physical_q0 = cpu_to_le16(physical_q);
 660         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 661         p_tcp_ramrod->iwarp.physical_q1 = cpu_to_le16(physical_q);
 662         p_tcp_ramrod->iwarp.mpa_mode = iwarp_info->mpa_rev;
 663
 664         tcp = &p_tcp_ramrod->tcp;
 665         qed_set_fw_mac_addr(&tcp->remote_mac_addr_hi,
 666                             &tcp->remote_mac_addr_mid,
 667                             &tcp->remote_mac_addr_lo, ep->remote_mac_addr);
 668         qed_set_fw_mac_addr(&tcp->local_mac_addr_hi, &tcp->local_mac_addr_mid,
 669                             &tcp->local_mac_addr_lo, ep->local_mac_addr);
 670
 671         tcp->vlan_id = cpu_to_le16(ep->cm_info.vlan);
 672
 673         tcp_flags = p_hwfn->p_rdma_info->iwarp.tcp_flags;
 674         tcp->flags = 0;
 675         SET_FIELD(tcp->flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN,
 676                   !!(tcp_flags & QED_IWARP_TS_EN));
 677
 678         SET_FIELD(tcp->flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN,
 679                   !!(tcp_flags & QED_IWARP_DA_EN));
 680
 681         tcp->ip_version = ep->cm_info.ip_version;
 682
 683         for (i = 0; i < 4; i++) {
 684                 tcp->remote_ip[i] = cpu_to_le32(ep->cm_info.remote_ip[i]);
 685                 tcp->local_ip[i] = cpu_to_le32(ep->cm_info.local_ip[i]);
 686         }
 687
 688         tcp->remote_port = cpu_to_le16(ep->cm_info.remote_port);
 689         tcp->local_port = cpu_to_le16(ep->cm_info.local_port);
 690         tcp->mss = cpu_to_le16(ep->mss);
 691         tcp->flow_label = 0;
 692         tcp->ttl = 0x40;
 693         tcp->tos_or_tc = 0;
 694
 695         tcp->rcv_wnd_scale = (u8)p_hwfn->p_rdma_info->iwarp.rcv_wnd_scale;
 696         tcp->connect_mode = ep->connect_mode;
 697
 698         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 699                 tcp->syn_ip_payload_length =
 700                         cpu_to_le16(ep->syn_ip_payload_length);
 701                 tcp->syn_phy_addr_hi = DMA_HI_LE(ep->syn_phy_addr);
 702                 tcp->syn_phy_addr_lo = DMA_LO_LE(ep->syn_phy_addr);
 703         }
 704
 705         qed_iwarp_print_tcp_ramrod(p_hwfn, p_tcp_ramrod);
 706
 707         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 708
 709         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 710                    "EP(0x%x) Offload completed rc=%d\n", ep->tcp_cid, rc);
 711
 712         return rc;
 713 }
 714
 715 static void
 716 qed_iwarp_mpa_received(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 717 {
 718         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 719         struct qed_iwarp_cm_event_params params;
 720         struct mpa_v2_hdr *mpa_v2;
 721         union async_output *async_data;
 722         u16 mpa_ord, mpa_ird;
 723         u8 mpa_hdr_size = 0;
 724         u8 mpa_rev;
 725
 726         async_data = &ep->ep_buffer_virt->async_output;
 727
 728         mpa_rev = async_data->mpa_request.mpa_handshake_mode;
 729         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 730                    "private_data_len=%x handshake_mode=%x private_data=(%x)\n",
 731                    async_data->mpa_request.ulp_data_len,
 732                    mpa_rev, *((u32 *)(ep->ep_buffer_virt->in_pdata)));
 733
 734         if (mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
 735                 /* Read ord/ird values from private data buffer */
 736                 mpa_v2 = (struct mpa_v2_hdr *)ep->ep_buffer_virt->in_pdata;
 737                 mpa_hdr_size = sizeof(*mpa_v2);
 738
 739                 mpa_ord = ntohs(mpa_v2->ord);
 740                 mpa_ird = ntohs(mpa_v2->ird);
 741
 742                 /* Temprary store in cm_info incoming ord/ird requested, later
 743                  * replace with negotiated value during accept
 744                  */
 745                 ep->cm_info.ord = (u8)min_t(u16,
 746                                             (mpa_ord & MPA_V2_IRD_ORD_MASK),
 747                                             QED_IWARP_ORD_DEFAULT);
 748
 749                 ep->cm_info.ird = (u8)min_t(u16,
 750                                             (mpa_ird & MPA_V2_IRD_ORD_MASK),
 751                                             QED_IWARP_IRD_DEFAULT);
 752
 753                 /* Peer2Peer negotiation */
 754                 ep->rtr_type = MPA_RTR_TYPE_NONE;
 755                 if (mpa_ird & MPA_V2_PEER2PEER_MODEL) {
 756                         if (mpa_ord & MPA_V2_WRITE_RTR)
 757                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_WRITE;
 758
 759                         if (mpa_ord & MPA_V2_READ_RTR)
 760                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_READ;
 761
 762                         if (mpa_ird & MPA_V2_SEND_RTR)
 763                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_SEND;
 764
 765                         ep->rtr_type &= iwarp_info->rtr_type;
 766
 767                         /* if we're left with no match send our capabilities */
 768                         if (ep->rtr_type == MPA_RTR_TYPE_NONE)
 769                                 ep->rtr_type = iwarp_info->rtr_type;
 770                 }
 771
 772                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
 773         } else {
 774                 ep->cm_info.ord = QED_IWARP_ORD_DEFAULT;
 775                 ep->cm_info.ird = QED_IWARP_IRD_DEFAULT;
 776                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_BASIC;
 777         }
 778
 779         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 780                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x rtr:0x%x ulp_data_len = %x mpa_hdr_size = %x\n",
 781                    mpa_rev, ep->cm_info.ord, ep->cm_info.ird, ep->rtr_type,
 782                    async_data->mpa_request.ulp_data_len, mpa_hdr_size);
 783
 784         /* Strip mpa v2 hdr from private data before sending to upper layer */
 785         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_hdr_size;
 786
 787         ep->cm_info.private_data_len = async_data->mpa_request.ulp_data_len -
 788                                        mpa_hdr_size;
 789
 790         params.event = QED_IWARP_EVENT_MPA_REQUEST;
 791         params.cm_info = &ep->cm_info;
 792         params.ep_context = ep;
 793         params.status = 0;
 794
 795         ep->state = QED_IWARP_EP_MPA_REQ_RCVD;
 796         ep->event_cb(ep->cb_context, &params);
 797 }
 798
 799 static int
 800 qed_iwarp_mpa_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 801 {
 802         struct iwarp_mpa_offload_ramrod_data *p_mpa_ramrod;
 803         struct qed_sp_init_data init_data;
 804         dma_addr_t async_output_phys;
 805         struct qed_spq_entry *p_ent;
 806         dma_addr_t out_pdata_phys;
 807         dma_addr_t in_pdata_phys;
 808         struct qed_rdma_qp *qp;
 809         bool reject;
 810         int rc;
 811
 812         if (!ep)
 813                 return -EINVAL;
 814
 815         qp = ep->qp;
 816         reject = !qp;
 817
 818         memset(&init_data, 0, sizeof(init_data));
 819         init_data.cid = reject ? ep->tcp_cid : qp->icid;
 820         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 821
 822         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
 823                 init_data.comp_mode = QED_SPQ_MODE_CB;
 824         else
 825                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 826
 827         rc = qed_sp_init_request(p_hwfn, &p_ent,
 828                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD,
 829                                  PROTOCOLID_IWARP, &init_data);
 830         if (rc)
 831                 return rc;
 832
 833         p_mpa_ramrod = &p_ent->ramrod.iwarp_mpa_offload;
 834         out_pdata_phys = ep->ep_buffer_phys +
 835                          offsetof(struct qed_iwarp_ep_memory, out_pdata);
 836         DMA_REGPAIR_LE(p_mpa_ramrod->common.outgoing_ulp_buffer.addr,
 837                        out_pdata_phys);
 838         p_mpa_ramrod->common.outgoing_ulp_buffer.len =
 839             ep->cm_info.private_data_len;
 840         p_mpa_ramrod->common.crc_needed = p_hwfn->p_rdma_info->iwarp.crc_needed;
 841
 842         p_mpa_ramrod->common.out_rq.ord = ep->cm_info.ord;
 843         p_mpa_ramrod->common.out_rq.ird = ep->cm_info.ird;
 844
 845         p_mpa_ramrod->tcp_cid = p_hwfn->hw_info.opaque_fid << 16 | ep->tcp_cid;
 846
 847         in_pdata_phys = ep->ep_buffer_phys +
 848                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 849         p_mpa_ramrod->tcp_connect_side = ep->connect_mode;
 850         DMA_REGPAIR_LE(p_mpa_ramrod->incoming_ulp_buffer.addr,
 851                        in_pdata_phys);
 852         p_mpa_ramrod->incoming_ulp_buffer.len =
 853             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 854         async_output_phys = ep->ep_buffer_phys +
 855                             offsetof(struct qed_iwarp_ep_memory, async_output);
 856         DMA_REGPAIR_LE(p_mpa_ramrod->async_eqe_output_buf,
 857                        async_output_phys);
 858         p_mpa_ramrod->handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 859         p_mpa_ramrod->handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 860
 861         if (!reject) {
 862                 DMA_REGPAIR_LE(p_mpa_ramrod->shared_queue_addr,
 863                                qp->shared_queue_phys_addr);
 864                 p_mpa_ramrod->stats_counter_id =
 865                     RESC_START(p_hwfn, QED_RDMA_STATS_QUEUE) + qp->stats_queue;
 866         } else {
 867                 p_mpa_ramrod->common.reject = 1;
 868         }
 869
 870         p_mpa_ramrod->mode = ep->mpa_rev;
 871         SET_FIELD(p_mpa_ramrod->rtr_pref,
 872                   IWARP_MPA_OFFLOAD_RAMROD_DATA_RTR_SUPPORTED, ep->rtr_type);
 873
 874         ep->state = QED_IWARP_EP_MPA_OFFLOADED;
 875         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 876         if (!reject)
 877                 ep->cid = qp->icid;     /* Now they're migrated. */
 878
 879         DP_VERBOSE(p_hwfn,
 880                    QED_MSG_RDMA,
 881                    "QP(0x%x) EP(0x%x) MPA Offload rc = %d IRD=0x%x ORD=0x%x rtr_type=%d mpa_rev=%d reject=%d\n",
 882                    reject ? 0xffff : qp->icid,
 883                    ep->tcp_cid,
 884                    rc,
 885                    ep->cm_info.ird,
 886                    ep->cm_info.ord, ep->rtr_type, ep->mpa_rev, reject);
 887         return rc;
 888 }
 889
 890 static void
 891 qed_iwarp_return_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 892 {
 893         ep->state = QED_IWARP_EP_INIT;
 894         if (ep->qp)
 895                 ep->qp->ep = NULL;
 896         ep->qp = NULL;
 897         memset(&ep->cm_info, 0, sizeof(ep->cm_info));
 898
 899         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
 900                 /* We don't care about the return code, it's ok if tcp_cid
 901                  * remains invalid...in this case we'll defer allocation
 902                  */
 903                 qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
 904         }
 905         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 906
 907         list_del(&ep->list_entry);
 908         list_add_tail(&ep->list_entry,
 909                       &p_hwfn->p_rdma_info->iwarp.ep_free_list);
 910
 911         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 912 }
 913
 914 void
 915 qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 916 {
 917         struct mpa_v2_hdr *mpa_v2_params;
 918         union async_output *async_data;
 919         u16 mpa_ird, mpa_ord;
 920         u8 mpa_data_size = 0;
 921
 922         if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
 923                 mpa_v2_params =
 924                         (struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
 925                 mpa_data_size = sizeof(*mpa_v2_params);
 926                 mpa_ird = ntohs(mpa_v2_params->ird);
 927                 mpa_ord = ntohs(mpa_v2_params->ord);
 928
 929                 ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
 930                 ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
 931         }
 932         async_data = &ep->ep_buffer_virt->async_output;
 933
 934         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;
 935         ep->cm_info.private_data_len = async_data->mpa_response.ulp_data_len -
 936                                        mpa_data_size;
 937 }
 938
 939 void
 940 qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 941 {
 942         struct qed_iwarp_cm_event_params params;
 943
 944         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 945                 DP_NOTICE(p_hwfn,
 946                           "MPA reply event not expected on passive side!\n");
 947                 return;
 948         }
 949
 950         params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;
 951
 952         qed_iwarp_parse_private_data(p_hwfn, ep);
 953
 954         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 955                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
 956                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
 957
 958         params.cm_info = &ep->cm_info;
 959         params.ep_context = ep;
 960         params.status = 0;
 961
 962         ep->mpa_reply_processed = true;
 963
 964         ep->event_cb(ep->cb_context, &params);
 965 }
 966
 967 #define QED_IWARP_CONNECT_MODE_STRING(ep) \
 968         ((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"
 969
 970 /* Called as a result of the event:
 971  * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
 972  */
 973 static void
 974 qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
 975                        struct qed_iwarp_ep *ep, u8 fw_return_code)
 976 {
 977         struct qed_iwarp_cm_event_params params;
 978
 979         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
 980                 params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
 981         else
 982                 params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;
 983
 984         if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
 985                 qed_iwarp_parse_private_data(p_hwfn, ep);
 986
 987         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 988                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
 989                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
 990
 991         params.cm_info = &ep->cm_info;
 992
 993         params.ep_context = ep;
 994
 995         switch (fw_return_code) {
 996         case RDMA_RETURN_OK:
 997                 ep->qp->max_rd_atomic_req = ep->cm_info.ord;
 998                 ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
 999                 qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
1000                 ep->state = QED_IWARP_EP_ESTABLISHED;
1001                 params.status = 0;
1002                 break;
1003         case IWARP_CONN_ERROR_MPA_TIMEOUT:
1004                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
1005                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1006                 params.status = -EBUSY;
1007                 break;
1008         case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
1009                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
1010                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1011                 params.status = -ECONNREFUSED;
1012                 break;
1013         case IWARP_CONN_ERROR_MPA_RST:
1014                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
1015                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
1016                           ep->tcp_cid);
1017                 params.status = -ECONNRESET;
1018                 break;
1019         case IWARP_CONN_ERROR_MPA_FIN:
1020                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
1021                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1022                 params.status = -ECONNREFUSED;
1023                 break;
1024         case IWARP_CONN_ERROR_MPA_INSUF_IRD:
1025                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
1026                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1027                 params.status = -ECONNREFUSED;
1028                 break;
1029         case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
1030                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
1031                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1032                 params.status = -ECONNREFUSED;
1033                 break;
1034         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
1035                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
1036                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1037                 params.status = -ECONNREFUSED;
1038                 break;
1039         case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
1040                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
1041                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1042                 params.status = -ECONNREFUSED;
1043                 break;
1044         case IWARP_CONN_ERROR_MPA_TERMINATE:
1045                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
1046                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1047                 params.status = -ECONNREFUSED;
1048                 break;
1049         default:
1050                 params.status = -ECONNRESET;
1051                 break;
1052         }
1053
1054         if (fw_return_code != RDMA_RETURN_OK)
1055                 /* paired with READ_ONCE in destroy_qp */
1056                 smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
1057
1058         ep->event_cb(ep->cb_context, &params);
1059
1060         /* on passive side, if there is no associated QP (REJECT) we need to
1061          * return the ep to the pool, (in the regular case we add an element
1062          * in accept instead of this one.
1063          * In both cases we need to remove it from the ep_list.
1064          */
1065         if (fw_return_code != RDMA_RETURN_OK) {
1066                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1067                 if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
1068                     (!ep->qp)) {        /* Rejected */
1069                         qed_iwarp_return_ep(p_hwfn, ep);
1070                 } else {
1071                         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1072                         list_del(&ep->list_entry);
1073                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1074                 }
1075         }
1076 }
1077
1078 static void
1079 qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
1080                              struct qed_iwarp_ep *ep, u8 *mpa_data_size)
1081 {
1082         struct mpa_v2_hdr *mpa_v2_params;
1083         u16 mpa_ird, mpa_ord;
1084
1085         *mpa_data_size = 0;
1086         if (MPA_REV2(ep->mpa_rev)) {
1087                 mpa_v2_params =
1088                     (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
1089                 *mpa_data_size = sizeof(*mpa_v2_params);
1090
1091                 mpa_ird = (u16)ep->cm_info.ird;
1092                 mpa_ord = (u16)ep->cm_info.ord;
1093
1094                 if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
1095                         mpa_ird |= MPA_V2_PEER2PEER_MODEL;
1096
1097                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
1098                                 mpa_ird |= MPA_V2_SEND_RTR;
1099
1100                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
1101                                 mpa_ord |= MPA_V2_WRITE_RTR;
1102
1103                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
1104                                 mpa_ord |= MPA_V2_READ_RTR;
1105                 }
1106
1107                 mpa_v2_params->ird = htons(mpa_ird);
1108                 mpa_v2_params->ord = htons(mpa_ord);
1109
1110                 DP_VERBOSE(p_hwfn,
1111                            QED_MSG_RDMA,
1112                            "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
1113                            mpa_v2_params->ird,
1114                            mpa_v2_params->ord,
1115                            *((u32 *)mpa_v2_params),
1116                            mpa_ord & MPA_V2_IRD_ORD_MASK,
1117                            mpa_ird & MPA_V2_IRD_ORD_MASK,
1118                            !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
1119                            !!(mpa_ird & MPA_V2_SEND_RTR),
1120                            !!(mpa_ord & MPA_V2_WRITE_RTR),
1121                            !!(mpa_ord & MPA_V2_READ_RTR));
1122         }
1123 }
1124
1125 int qed_iwarp_connect(void *rdma_cxt,
1126                       struct qed_iwarp_connect_in *iparams,
1127                       struct qed_iwarp_connect_out *oparams)
1128 {
1129         struct qed_hwfn *p_hwfn = rdma_cxt;
1130         struct qed_iwarp_info *iwarp_info;
1131         struct qed_iwarp_ep *ep;
1132         u8 mpa_data_size = 0;
1133         u8 ts_hdr_size = 0;
1134         u32 cid;
1135         int rc;
1136
1137         if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
1138             (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
1139                 DP_NOTICE(p_hwfn,
1140                           "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1141                           iparams->qp->icid, iparams->cm_info.ord,
1142                           iparams->cm_info.ird);
1143
1144                 return -EINVAL;
1145         }
1146
1147         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1148
1149         /* Allocate ep object */
1150         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1151         if (rc)
1152                 return rc;
1153
1154         rc = qed_iwarp_create_ep(p_hwfn, &ep);
1155         if (rc)
1156                 goto err;
1157
1158         ep->tcp_cid = cid;
1159
1160         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1161         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1162         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1163
1164         ep->qp = iparams->qp;
1165         ep->qp->ep = ep;
1166         ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
1167         ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
1168         memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));
1169
1170         ep->cm_info.ord = iparams->cm_info.ord;
1171         ep->cm_info.ird = iparams->cm_info.ird;
1172
1173         ep->rtr_type = iwarp_info->rtr_type;
1174         if (!iwarp_info->peer2peer)
1175                 ep->rtr_type = MPA_RTR_TYPE_NONE;
1176
1177         if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
1178                 ep->cm_info.ord = 1;
1179
1180         ep->mpa_rev = iwarp_info->mpa_rev;
1181
1182         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1183
1184         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1185         ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
1186                                        mpa_data_size;
1187
1188         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1189                iparams->cm_info.private_data,
1190                iparams->cm_info.private_data_len);
1191
1192         if (p_hwfn->p_rdma_info->iwarp.tcp_flags & QED_IWARP_TS_EN)
1193                 ts_hdr_size = TIMESTAMP_HEADER_SIZE;
1194
1195         ep->mss = iparams->mss - ts_hdr_size;
1196         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1197
1198         ep->event_cb = iparams->event_cb;
1199         ep->cb_context = iparams->cb_context;
1200         ep->connect_mode = TCP_CONNECT_ACTIVE;
1201
1202         oparams->ep_context = ep;
1203
1204         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1205
1206         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
1207                    iparams->qp->icid, ep->tcp_cid, rc);
1208
1209         if (rc) {
1210                 qed_iwarp_destroy_ep(p_hwfn, ep, true);
1211                 goto err;
1212         }
1213
1214         return rc;
1215 err:
1216         qed_iwarp_cid_cleaned(p_hwfn, cid);
1217
1218         return rc;
1219 }
1220
1221 static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
1222 {
1223         struct qed_iwarp_ep *ep = NULL;
1224         int rc;
1225
1226         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1227
1228         if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1229                 DP_ERR(p_hwfn, "Ep list is empty\n");
1230                 goto out;
1231         }
1232
1233         ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1234                               struct qed_iwarp_ep, list_entry);
1235
1236         /* in some cases we could have failed allocating a tcp cid when added
1237          * from accept / failure... retry now..this is not the common case.
1238          */
1239         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
1240                 rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
1241
1242                 /* if we fail we could look for another entry with a valid
1243                  * tcp_cid, but since we don't expect to reach this anyway
1244                  * it's not worth the handling
1245                  */
1246                 if (rc) {
1247                         ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1248                         ep = NULL;
1249                         goto out;
1250                 }
1251         }
1252
1253         list_del(&ep->list_entry);
1254
1255 out:
1256         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1257         return ep;
1258 }
1259
1260 #define QED_IWARP_MAX_CID_CLEAN_TIME  100
1261 #define QED_IWARP_MAX_NO_PROGRESS_CNT 5
1262
1263 /* This function waits for all the bits of a bmap to be cleared, as long as
1264  * there is progress ( i.e. the number of bits left to be cleared decreases )
1265  * the function continues.
1266  */
1267 static int
1268 qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
1269 {
1270         int prev_weight = 0;
1271         int wait_count = 0;
1272         int weight = 0;
1273
1274         weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1275         prev_weight = weight;
1276
1277         while (weight) {
1278                 msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
1279
1280                 weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1281
1282                 if (prev_weight == weight) {
1283                         wait_count++;
1284                 } else {
1285                         prev_weight = weight;
1286                         wait_count = 0;
1287                 }
1288
1289                 if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
1290                         DP_NOTICE(p_hwfn,
1291                                   "%s bitmap wait timed out (%d cids pending)\n",
1292                                   bmap->name, weight);
1293                         return -EBUSY;
1294                 }
1295         }
1296         return 0;
1297 }
1298
1299 static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
1300 {
1301         int rc;
1302         int i;
1303
1304         rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
1305                                             &p_hwfn->p_rdma_info->tcp_cid_map);
1306         if (rc)
1307                 return rc;
1308
1309         /* Now free the tcp cids from the main cid map */
1310         for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
1311                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);
1312
1313         /* Now wait for all cids to be completed */
1314         return qed_iwarp_wait_cid_map_cleared(p_hwfn,
1315                                               &p_hwfn->p_rdma_info->cid_map);
1316 }
1317
1318 static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
1319 {
1320         struct qed_iwarp_ep *ep;
1321
1322         while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1323                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1324
1325                 ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1326                                       struct qed_iwarp_ep, list_entry);
1327
1328                 if (!ep) {
1329                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1330                         break;
1331                 }
1332                 list_del(&ep->list_entry);
1333
1334                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1335
1336                 if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
1337                         qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);
1338
1339                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
1340         }
1341 }
1342
1343 static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
1344 {
1345         struct qed_iwarp_ep *ep;
1346         int rc = 0;
1347         int count;
1348         u32 cid;
1349         int i;
1350
1351         count = init ? QED_IWARP_PREALLOC_CNT : 1;
1352         for (i = 0; i < count; i++) {
1353                 rc = qed_iwarp_create_ep(p_hwfn, &ep);
1354                 if (rc)
1355                         return rc;
1356
1357                 /* During initialization we allocate from the main pool,
1358                  * afterwards we allocate only from the tcp_cid.
1359                  */
1360                 if (init) {
1361                         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1362                         if (rc)
1363                                 goto err;
1364                         qed_iwarp_set_tcp_cid(p_hwfn, cid);
1365                 } else {
1366                         /* We don't care about the return code, it's ok if
1367                          * tcp_cid remains invalid...in this case we'll
1368                          * defer allocation
1369                          */
1370                         qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
1371                 }
1372
1373                 ep->tcp_cid = cid;
1374
1375                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1376                 list_add_tail(&ep->list_entry,
1377                               &p_hwfn->p_rdma_info->iwarp.ep_free_list);
1378                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1379         }
1380
1381         return rc;
1382
1383 err:
1384         qed_iwarp_destroy_ep(p_hwfn, ep, false);
1385
1386         return rc;
1387 }
1388
1389 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
1390 {
1391         int rc;
1392
1393         /* Allocate bitmap for tcp cid. These are used by passive side
1394          * to ensure it can allocate a tcp cid during dpc that was
1395          * pre-acquired and doesn't require dynamic allocation of ilt
1396          */
1397         rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
1398                                  QED_IWARP_PREALLOC_CNT, "TCP_CID");
1399         if (rc) {
1400                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1401                            "Failed to allocate tcp cid, rc = %d\n", rc);
1402                 return rc;
1403         }
1404
1405         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
1406         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1407
1408         return qed_iwarp_prealloc_ep(p_hwfn, true);
1409 }
1410
1411 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
1412 {
1413         qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
1414 }
1415
1416 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
1417 {
1418         struct qed_hwfn *p_hwfn = rdma_cxt;
1419         struct qed_iwarp_ep *ep;
1420         u8 mpa_data_size = 0;
1421         int rc;
1422
1423         ep = iparams->ep_context;
1424         if (!ep) {
1425                 DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
1426                 return -EINVAL;
1427         }
1428
1429         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
1430                    iparams->qp->icid, ep->tcp_cid);
1431
1432         if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
1433             (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
1434                 DP_VERBOSE(p_hwfn,
1435                            QED_MSG_RDMA,
1436                            "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1437                            iparams->qp->icid,
1438                            ep->tcp_cid, iparams->ord, iparams->ord);
1439                 return -EINVAL;
1440         }
1441
1442         qed_iwarp_prealloc_ep(p_hwfn, false);
1443
1444         ep->cb_context = iparams->cb_context;
1445         ep->qp = iparams->qp;
1446         ep->qp->ep = ep;
1447
1448         if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
1449                 /* Negotiate ord/ird: if upperlayer requested ord larger than
1450                  * ird advertised by remote, we need to decrease our ord
1451                  */
1452                 if (iparams->ord > ep->cm_info.ird)
1453                         iparams->ord = ep->cm_info.ird;
1454
1455                 if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
1456                     (iparams->ird == 0))
1457                         iparams->ird = 1;
1458         }
1459
1460         /* Update cm_info ord/ird to be negotiated values */
1461         ep->cm_info.ord = iparams->ord;
1462         ep->cm_info.ird = iparams->ird;
1463
1464         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1465
1466         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1467         ep->cm_info.private_data_len = iparams->private_data_len +
1468                                        mpa_data_size;
1469
1470         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1471                iparams->private_data, iparams->private_data_len);
1472
1473         rc = qed_iwarp_mpa_offload(p_hwfn, ep);
1474         if (rc)
1475                 qed_iwarp_modify_qp(p_hwfn,
1476                                     iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);
1477
1478         return rc;
1479 }
1480
1481 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
1482 {
1483         struct qed_hwfn *p_hwfn = rdma_cxt;
1484         struct qed_iwarp_ep *ep;
1485         u8 mpa_data_size = 0;
1486
1487         ep = iparams->ep_context;
1488         if (!ep) {
1489                 DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
1490                 return -EINVAL;
1491         }
1492
1493         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);
1494
1495         ep->cb_context = iparams->cb_context;
1496         ep->qp = NULL;
1497
1498         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1499
1500         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1501         ep->cm_info.private_data_len = iparams->private_data_len +
1502                                        mpa_data_size;
1503
1504         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1505                iparams->private_data, iparams->private_data_len);
1506
1507         return qed_iwarp_mpa_offload(p_hwfn, ep);
1508 }
1509
1510 static void
1511 qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
1512                         struct qed_iwarp_cm_info *cm_info)
1513 {
1514         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
1515                    cm_info->ip_version);
1516
1517         if (cm_info->ip_version == QED_TCP_IPV4)
1518                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1519                            "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
1520                            cm_info->remote_ip, cm_info->remote_port,
1521                            cm_info->local_ip, cm_info->local_port,
1522                            cm_info->vlan);
1523         else
1524                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1525                            "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
1526                            cm_info->remote_ip, cm_info->remote_port,
1527                            cm_info->local_ip, cm_info->local_port,
1528                            cm_info->vlan);
1529
1530         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1531                    "private_data_len = %x ord = %d, ird = %d\n",
1532                    cm_info->private_data_len, cm_info->ord, cm_info->ird);
1533 }
1534
1535 static int
1536 qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
1537                       struct qed_iwarp_ll2_buff *buf, u8 handle)
1538 {
1539         int rc;
1540
1541         rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
1542                                     (u16)buf->buff_size, buf, 1);
1543         if (rc) {
1544                 DP_NOTICE(p_hwfn,
1545                           "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
1546                           rc, handle);
1547                 dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
1548                                   buf->data, buf->data_phys_addr);
1549                 kfree(buf);
1550         }
1551
1552         return rc;
1553 }
1554
1555 static bool
1556 qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
1557 {
1558         struct qed_iwarp_ep *ep = NULL;
1559         bool found = false;
1560
1561         list_for_each_entry(ep,
1562                             &p_hwfn->p_rdma_info->iwarp.ep_list,
1563                             list_entry) {
1564                 if ((ep->cm_info.local_port == cm_info->local_port) &&
1565                     (ep->cm_info.remote_port == cm_info->remote_port) &&
1566                     (ep->cm_info.vlan == cm_info->vlan) &&
1567                     !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
1568                             sizeof(cm_info->local_ip)) &&
1569                     !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
1570                             sizeof(cm_info->remote_ip))) {
1571                         found = true;
1572                         break;
1573                 }
1574         }
1575
1576         if (found) {
1577                 DP_NOTICE(p_hwfn,
1578                           "SYN received on active connection - dropping\n");
1579                 qed_iwarp_print_cm_info(p_hwfn, cm_info);
1580
1581                 return true;
1582         }
1583
1584         return false;
1585 }
1586
1587 static struct qed_iwarp_listener *
1588 qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
1589                        struct qed_iwarp_cm_info *cm_info)
1590 {
1591         struct qed_iwarp_listener *listener = NULL;
1592         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1593         bool found = false;
1594
1595         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1596
1597         list_for_each_entry(listener,
1598                             &p_hwfn->p_rdma_info->iwarp.listen_list,
1599                             list_entry) {
1600                 if (listener->port == cm_info->local_port) {
1601                         if (!memcmp(listener->ip_addr,
1602                                     ip_zero, sizeof(ip_zero))) {
1603                                 found = true;
1604                                 break;
1605                         }
1606
1607                         if (!memcmp(listener->ip_addr,
1608                                     cm_info->local_ip,
1609                                     sizeof(cm_info->local_ip)) &&
1610                             (listener->vlan == cm_info->vlan)) {
1611                                 found = true;
1612                                 break;
1613                         }
1614                 }
1615         }
1616
1617         if (found) {
1618                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
1619                            listener);
1620                 return listener;
1621         }
1622
1623         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
1624         return NULL;
1625 }
1626
1627 static int
1628 qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
1629                        struct qed_iwarp_cm_info *cm_info,
1630                        void *buf,
1631                        u8 *remote_mac_addr,
1632                        u8 *local_mac_addr,
1633                        int *payload_len, int *tcp_start_offset)
1634 {
1635         struct vlan_ethhdr *vethh;
1636         bool vlan_valid = false;
1637         struct ipv6hdr *ip6h;
1638         struct ethhdr *ethh;
1639         struct tcphdr *tcph;
1640         struct iphdr *iph;
1641         int eth_hlen;
1642         int ip_hlen;
1643         int eth_type;
1644         int i;
1645
1646         ethh = buf;
1647         eth_type = ntohs(ethh->h_proto);
1648         if (eth_type == ETH_P_8021Q) {
1649                 vlan_valid = true;
1650                 vethh = (struct vlan_ethhdr *)ethh;
1651                 cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
1652                 eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
1653         }
1654
1655         eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);
1656
1657         if (!ether_addr_equal(ethh->h_dest,
1658                               p_hwfn->p_rdma_info->iwarp.mac_addr)) {
1659                 DP_VERBOSE(p_hwfn,
1660                            QED_MSG_RDMA,
1661                            "Got unexpected mac %pM instead of %pM\n",
1662                            ethh->h_dest, p_hwfn->p_rdma_info->iwarp.mac_addr);
1663                 return -EINVAL;
1664         }
1665
1666         ether_addr_copy(remote_mac_addr, ethh->h_source);
1667         ether_addr_copy(local_mac_addr, ethh->h_dest);
1668
1669         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
1670                    eth_type, ethh->h_source);
1671
1672         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
1673                    eth_hlen, ethh->h_dest);
1674
1675         iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
1676
1677         if (eth_type == ETH_P_IP) {
1678                 if (iph->protocol != IPPROTO_TCP) {
1679                         DP_NOTICE(p_hwfn,
1680                                   "Unexpected ip protocol on ll2 %x\n",
1681                                   iph->protocol);
1682                         return -EINVAL;
1683                 }
1684
1685                 cm_info->local_ip[0] = ntohl(iph->daddr);
1686                 cm_info->remote_ip[0] = ntohl(iph->saddr);
1687                 cm_info->ip_version = QED_TCP_IPV4;
1688
1689                 ip_hlen = (iph->ihl) * sizeof(u32);
1690                 *payload_len = ntohs(iph->tot_len) - ip_hlen;
1691         } else if (eth_type == ETH_P_IPV6) {
1692                 ip6h = (struct ipv6hdr *)iph;
1693
1694                 if (ip6h->nexthdr != IPPROTO_TCP) {
1695                         DP_NOTICE(p_hwfn,
1696                                   "Unexpected ip protocol on ll2 %x\n",
1697                                   iph->protocol);
1698                         return -EINVAL;
1699                 }
1700
1701                 for (i = 0; i < 4; i++) {
1702                         cm_info->local_ip[i] =
1703                             ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
1704                         cm_info->remote_ip[i] =
1705                             ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
1706                 }
1707                 cm_info->ip_version = QED_TCP_IPV6;
1708
1709                 ip_hlen = sizeof(*ip6h);
1710                 *payload_len = ntohs(ip6h->payload_len);
1711         } else {
1712                 DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
1713                 return -EINVAL;
1714         }
1715
1716         tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);
1717
1718         if (!tcph->syn) {
1719                 DP_NOTICE(p_hwfn,
1720                           "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
1721                           iph->ihl, tcph->source, tcph->dest);
1722                 return -EINVAL;
1723         }
1724
1725         cm_info->local_port = ntohs(tcph->dest);
1726         cm_info->remote_port = ntohs(tcph->source);
1727
1728         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1729
1730         *tcp_start_offset = eth_hlen + ip_hlen;
1731
1732         return 0;
1733 }
1734
1735 static void
1736 qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
1737 {
1738         struct qed_iwarp_ll2_buff *buf = data->cookie;
1739         struct qed_iwarp_listener *listener;
1740         struct qed_ll2_tx_pkt_info tx_pkt;
1741         struct qed_iwarp_cm_info cm_info;
1742         struct qed_hwfn *p_hwfn = cxt;
1743         u8 remote_mac_addr[ETH_ALEN];
1744         u8 local_mac_addr[ETH_ALEN];
1745         struct qed_iwarp_ep *ep;
1746         int tcp_start_offset;
1747         u8 ts_hdr_size = 0;
1748         u8 ll2_syn_handle;
1749         int payload_len;
1750         u32 hdr_size;
1751         int rc;
1752
1753         memset(&cm_info, 0, sizeof(cm_info));
1754         ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
1755         if (GET_FIELD(data->parse_flags,
1756                       PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
1757             GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
1758                 DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
1759                 goto err;
1760         }
1761
1762         rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
1763                                     data->u.placement_offset, remote_mac_addr,
1764                                     local_mac_addr, &payload_len,
1765                                     &tcp_start_offset);
1766         if (rc)
1767                 goto err;
1768
1769         /* Check if there is a listener for this 4-tuple+vlan */
1770         listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
1771         if (!listener) {
1772                 DP_VERBOSE(p_hwfn,
1773                            QED_MSG_RDMA,
1774                            "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
1775                            data->parse_flags, data->length.packet_length);
1776
1777                 memset(&tx_pkt, 0, sizeof(tx_pkt));
1778                 tx_pkt.num_of_bds = 1;
1779                 tx_pkt.vlan = data->vlan;
1780
1781                 if (GET_FIELD(data->parse_flags,
1782                               PARSING_AND_ERR_FLAGS_TAG8021QEXIST))
1783                         SET_FIELD(tx_pkt.bd_flags,
1784                                   CORE_TX_BD_DATA_VLAN_INSERTION, 1);
1785
1786                 tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
1787                 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
1788                 tx_pkt.first_frag = buf->data_phys_addr +
1789                                     data->u.placement_offset;
1790                 tx_pkt.first_frag_len = data->length.packet_length;
1791                 tx_pkt.cookie = buf;
1792
1793                 rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
1794                                                &tx_pkt, true);
1795
1796                 if (rc) {
1797                         DP_NOTICE(p_hwfn,
1798                                   "Can't post SYN back to chip rc=%d\n", rc);
1799                         goto err;
1800                 }
1801                 return;
1802         }
1803
1804         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
1805         /* There may be an open ep on this connection if this is a syn
1806          * retrasnmit... need to make sure there isn't...
1807          */
1808         if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
1809                 goto err;
1810
1811         ep = qed_iwarp_get_free_ep(p_hwfn);
1812         if (!ep)
1813                 goto err;
1814
1815         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1816         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1817         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1818
1819         ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
1820         ether_addr_copy(ep->local_mac_addr, local_mac_addr);
1821
1822         memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));
1823
1824         if (p_hwfn->p_rdma_info->iwarp.tcp_flags & QED_IWARP_TS_EN)
1825                 ts_hdr_size = TIMESTAMP_HEADER_SIZE;
1826
1827         hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60) +
1828                    ts_hdr_size;
1829         ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
1830         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1831
1832         ep->event_cb = listener->event_cb;
1833         ep->cb_context = listener->cb_context;
1834         ep->connect_mode = TCP_CONNECT_PASSIVE;
1835
1836         ep->syn = buf;
1837         ep->syn_ip_payload_length = (u16)payload_len;
1838         ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
1839                            tcp_start_offset;
1840
1841         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1842         if (rc) {
1843                 qed_iwarp_return_ep(p_hwfn, ep);
1844                 goto err;
1845         }
1846
1847         return;
1848 err:
1849         qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
1850 }
1851
1852 static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
1853                                      void *cookie, dma_addr_t rx_buf_addr,
1854                                      bool b_last_packet)
1855 {
1856         struct qed_iwarp_ll2_buff *buffer = cookie;
1857         struct qed_hwfn *p_hwfn = cxt;
1858
1859         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
1860                           buffer->data, buffer->data_phys_addr);
1861         kfree(buffer);
1862 }
1863
1864 static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
1865                                       void *cookie, dma_addr_t first_frag_addr,
1866                                       bool b_last_fragment, bool b_last_packet)
1867 {
1868         struct qed_iwarp_ll2_buff *buffer = cookie;
1869         struct qed_hwfn *p_hwfn = cxt;
1870
1871         /* this was originally an rx packet, post it back */
1872         qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);
1873 }
1874
1875 static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
1876                                      void *cookie, dma_addr_t first_frag_addr,
1877                                      bool b_last_fragment, bool b_last_packet)
1878 {
1879         struct qed_iwarp_ll2_buff *buffer = cookie;
1880         struct qed_hwfn *p_hwfn = cxt;
1881
1882         if (!buffer)
1883                 return;
1884
1885         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
1886                           buffer->data, buffer->data_phys_addr);
1887
1888         kfree(buffer);
1889 }
1890
1891 static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
1892 {
1893         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1894         int rc = 0;
1895
1896         if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
1897                 rc = qed_ll2_terminate_connection(p_hwfn,
1898                                                   iwarp_info->ll2_syn_handle);
1899                 if (rc)
1900                         DP_INFO(p_hwfn, "Failed to terminate syn connection\n");
1901
1902                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
1903                 iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
1904         }
1905
1906         qed_llh_remove_mac_filter(p_hwfn,
1907                                   p_ptt, p_hwfn->p_rdma_info->iwarp.mac_addr);
1908         return rc;
1909 }
1910
1911 static int
1912 qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
1913                             int num_rx_bufs, int buff_size, u8 ll2_handle)
1914 {
1915         struct qed_iwarp_ll2_buff *buffer;
1916         int rc = 0;
1917         int i;
1918
1919         for (i = 0; i < num_rx_bufs; i++) {
1920                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
1921                 if (!buffer) {
1922                         rc = -ENOMEM;
1923                         break;
1924                 }
1925
1926                 buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1927                                                   buff_size,
1928                                                   &buffer->data_phys_addr,
1929                                                   GFP_KERNEL);
1930                 if (!buffer->data) {
1931                         kfree(buffer);
1932                         rc = -ENOMEM;
1933                         break;
1934                 }
1935
1936                 buffer->buff_size = buff_size;
1937                 rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
1938                 if (rc)
1939                         /* buffers will be deallocated by qed_ll2 */
1940                         break;
1941         }
1942         return rc;
1943 }
1944
1945 #define QED_IWARP_MAX_BUF_SIZE(mtu)                                  \
1946         ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
1947                 ETH_CACHE_LINE_SIZE)
1948
1949 static int
1950 qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
1951                     struct qed_rdma_start_in_params *params,
1952                     struct qed_ptt *p_ptt)
1953 {
1954         struct qed_iwarp_info *iwarp_info;
1955         struct qed_ll2_acquire_data data;
1956         struct qed_ll2_cbs cbs;
1957         int rc = 0;
1958
1959         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1960         iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
1961
1962         iwarp_info->max_mtu = params->max_mtu;
1963
1964         ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);
1965
1966         rc = qed_llh_add_mac_filter(p_hwfn, p_ptt, params->mac_addr);
1967         if (rc)
1968                 return rc;
1969
1970         /* Start SYN connection */
1971         cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
1972         cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
1973         cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
1974         cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
1975         cbs.cookie = p_hwfn;
1976
1977         memset(&data, 0, sizeof(data));
1978         data.input.conn_type = QED_LL2_TYPE_IWARP;
1979         data.input.mtu = QED_IWARP_MAX_SYN_PKT_SIZE;
1980         data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
1981         data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
1982         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
1983         data.input.tx_tc = PKT_LB_TC;
1984         data.input.tx_dest = QED_LL2_TX_DEST_LB;
1985         data.p_connection_handle = &iwarp_info->ll2_syn_handle;
1986         data.cbs = &cbs;
1987
1988         rc = qed_ll2_acquire_connection(p_hwfn, &data);
1989         if (rc) {
1990                 DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
1991                 qed_llh_remove_mac_filter(p_hwfn, p_ptt, params->mac_addr);
1992                 return rc;
1993         }
1994
1995         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
1996         if (rc) {
1997                 DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
1998                 goto err;
1999         }
2000
2001         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2002                                          QED_IWARP_LL2_SYN_RX_SIZE,
2003                                          QED_IWARP_MAX_SYN_PKT_SIZE,
2004                                          iwarp_info->ll2_syn_handle);
2005         if (rc)
2006                 goto err;
2007
2008         return rc;
2009 err:
2010         qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2011
2012         return rc;
2013 }
2014
2015 int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
2016                     struct qed_rdma_start_in_params *params)
2017 {
2018         struct qed_iwarp_info *iwarp_info;
2019         u32 rcv_wnd_size;
2020
2021         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2022
2023         iwarp_info->tcp_flags = QED_IWARP_TS_EN;
2024         rcv_wnd_size = QED_IWARP_RCV_WND_SIZE_DEF;
2025
2026         /* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
2027         iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
2028             ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
2029         iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
2030         iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
2031
2032         iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
2033
2034         iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
2035                                 MPA_RTR_TYPE_ZERO_WRITE |
2036                                 MPA_RTR_TYPE_ZERO_READ;
2037
2038         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
2039         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
2040         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);
2041
2042         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
2043                                   qed_iwarp_async_event);
2044
2045         return qed_iwarp_ll2_start(p_hwfn, params, p_ptt);
2046 }
2047
2048 int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2049 {
2050         int rc;
2051
2052         qed_iwarp_free_prealloc_ep(p_hwfn);
2053         rc = qed_iwarp_wait_for_all_cids(p_hwfn);
2054         if (rc)
2055                 return rc;
2056
2057         qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_IWARP);
2058
2059         return qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2060 }
2061
2062 void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
2063                            struct qed_iwarp_ep *ep, u8 fw_return_code)
2064 {
2065         struct qed_iwarp_cm_event_params params;
2066
2067         qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
2068
2069         params.event = QED_IWARP_EVENT_CLOSE;
2070         params.ep_context = ep;
2071         params.cm_info = &ep->cm_info;
2072         params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
2073                          0 : -ECONNRESET;
2074
2075         /* paired with READ_ONCE in destroy_qp */
2076         smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2077
2078         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2079         list_del(&ep->list_entry);
2080         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2081
2082         ep->event_cb(ep->cb_context, &params);
2083 }
2084
2085 void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
2086                                   struct qed_iwarp_ep *ep, int fw_ret_code)
2087 {
2088         struct qed_iwarp_cm_event_params params;
2089         bool event_cb = false;
2090
2091         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
2092                    ep->cid, fw_ret_code);
2093
2094         switch (fw_ret_code) {
2095         case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
2096                 params.status = 0;
2097                 params.event = QED_IWARP_EVENT_DISCONNECT;
2098                 event_cb = true;
2099                 break;
2100         case IWARP_EXCEPTION_DETECTED_LLP_RESET:
2101                 params.status = -ECONNRESET;
2102                 params.event = QED_IWARP_EVENT_DISCONNECT;
2103                 event_cb = true;
2104                 break;
2105         case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
2106                 params.event = QED_IWARP_EVENT_RQ_EMPTY;
2107                 event_cb = true;
2108                 break;
2109         case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
2110                 params.event = QED_IWARP_EVENT_IRQ_FULL;
2111                 event_cb = true;
2112                 break;
2113         case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
2114                 params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
2115                 event_cb = true;
2116                 break;
2117         case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
2118                 params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
2119                 event_cb = true;
2120                 break;
2121         case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
2122                 params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
2123                 event_cb = true;
2124                 break;
2125         case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
2126                 params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
2127                 event_cb = true;
2128                 break;
2129         case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
2130                 params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
2131                 event_cb = true;
2132                 break;
2133         case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
2134                 params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
2135                 event_cb = true;
2136                 break;
2137         case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
2138                 params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
2139                 event_cb = true;
2140                 break;
2141         default:
2142                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2143                            "Unhandled exception received...fw_ret_code=%d\n",
2144                            fw_ret_code);
2145                 break;
2146         }
2147
2148         if (event_cb) {
2149                 params.ep_context = ep;
2150                 params.cm_info = &ep->cm_info;
2151                 ep->event_cb(ep->cb_context, &params);
2152         }
2153 }
2154
2155 static void
2156 qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
2157                                    struct qed_iwarp_ep *ep, u8 fw_return_code)
2158 {
2159         struct qed_iwarp_cm_event_params params;
2160
2161         memset(&params, 0, sizeof(params));
2162         params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
2163         params.ep_context = ep;
2164         params.cm_info = &ep->cm_info;
2165         /* paired with READ_ONCE in destroy_qp */
2166         smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2167
2168         switch (fw_return_code) {
2169         case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
2170                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2171                            "%s(0x%x) TCP connect got invalid packet\n",
2172                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2173                 params.status = -ECONNRESET;
2174                 break;
2175         case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
2176                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2177                            "%s(0x%x) TCP Connection Reset\n",
2178                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2179                 params.status = -ECONNRESET;
2180                 break;
2181         case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
2182                 DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
2183                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2184                 params.status = -EBUSY;
2185                 break;
2186         case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
2187                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
2188                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2189                 params.status = -ECONNREFUSED;
2190                 break;
2191         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
2192                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
2193                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2194                 params.status = -ECONNRESET;
2195                 break;
2196         default:
2197                 DP_ERR(p_hwfn,
2198                        "%s(0x%x) Unexpected return code tcp connect: %d\n",
2199                        QED_IWARP_CONNECT_MODE_STRING(ep),
2200                        ep->tcp_cid, fw_return_code);
2201                 params.status = -ECONNRESET;
2202                 break;
2203         }
2204
2205         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2206                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
2207                 qed_iwarp_return_ep(p_hwfn, ep);
2208         } else {
2209                 ep->event_cb(ep->cb_context, &params);
2210                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2211                 list_del(&ep->list_entry);
2212                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2213         }
2214 }
2215
2216 void
2217 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
2218                            struct qed_iwarp_ep *ep, u8 fw_return_code)
2219 {
2220         u8 ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2221
2222         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2223                 /* Done with the SYN packet, post back to ll2 rx */
2224                 qed_iwarp_ll2_post_rx(p_hwfn, ep->syn, ll2_syn_handle);
2225
2226                 ep->syn = NULL;
2227
2228                 /* If connect failed - upper layer doesn't know about it */
2229                 if (fw_return_code == RDMA_RETURN_OK)
2230                         qed_iwarp_mpa_received(p_hwfn, ep);
2231                 else
2232                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2233                                                            fw_return_code);
2234         } else {
2235                 if (fw_return_code == RDMA_RETURN_OK)
2236                         qed_iwarp_mpa_offload(p_hwfn, ep);
2237                 else
2238                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2239                                                            fw_return_code);
2240         }
2241 }
2242
2243 static inline bool
2244 qed_iwarp_check_ep_ok(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
2245 {
2246         if (!ep || (ep->sig != QED_EP_SIG)) {
2247                 DP_ERR(p_hwfn, "ERROR ON ASYNC ep=%p\n", ep);
2248                 return false;
2249         }
2250
2251         return true;
2252 }
2253
2254 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
2255                                  u8 fw_event_code, u16 echo,
2256                                  union event_ring_data *data,
2257                                  u8 fw_return_code)
2258 {
2259         struct regpair *fw_handle = &data->rdma_data.async_handle;
2260         struct qed_iwarp_ep *ep = NULL;
2261         u16 cid;
2262
2263         ep = (struct qed_iwarp_ep *)(uintptr_t)HILO_64(fw_handle->hi,
2264                                                        fw_handle->lo);
2265
2266         switch (fw_event_code) {
2267         case IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE:
2268                 /* Async completion after TCP 3-way handshake */
2269                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
2270                         return -EINVAL;
2271                 DP_VERBOSE(p_hwfn,
2272                            QED_MSG_RDMA,
2273                            "EP(0x%x) IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE fw_ret_code=%d\n",
2274                            ep->tcp_cid, fw_return_code);
2275                 qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
2276                 break;
2277         case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
2278                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
2279                         return -EINVAL;
2280                 DP_VERBOSE(p_hwfn,
2281                            QED_MSG_RDMA,
2282                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
2283                            ep->cid, fw_return_code);
2284                 qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
2285                 break;
2286         case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
2287                 /* Async completion for Close Connection ramrod */
2288                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
2289                         return -EINVAL;
2290                 DP_VERBOSE(p_hwfn,
2291                            QED_MSG_RDMA,
2292                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
2293                            ep->cid, fw_return_code);
2294                 qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
2295                 break;
2296         case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
2297                 /* Async event for active side only */
2298                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
2299                         return -EINVAL;
2300                 DP_VERBOSE(p_hwfn,
2301                            QED_MSG_RDMA,
2302                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_MPA_REPLY_ARRIVED fw_ret_code=%d\n",
2303                            ep->cid, fw_return_code);
2304                 qed_iwarp_mpa_reply_arrived(p_hwfn, ep);
2305                 break;
2306         case IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE:
2307                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
2308                         return -EINVAL;
2309                 DP_VERBOSE(p_hwfn,
2310                            QED_MSG_RDMA,
2311                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE fw_ret_code=%d\n",
2312                            ep->cid, fw_return_code);
2313                 qed_iwarp_mpa_complete(p_hwfn, ep, fw_return_code);
2314                 break;
2315         case IWARP_EVENT_TYPE_ASYNC_CID_CLEANED:
2316                 cid = (u16)le32_to_cpu(fw_handle->lo);
2317                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2318                            "(0x%x)IWARP_EVENT_TYPE_ASYNC_CID_CLEANED\n", cid);
2319                 qed_iwarp_cid_cleaned(p_hwfn, cid);
2320
2321                 break;
2322         case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
2323                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
2324
2325                 p_hwfn->p_rdma_info->events.affiliated_event(
2326                         p_hwfn->p_rdma_info->events.context,
2327                         QED_IWARP_EVENT_CQ_OVERFLOW,
2328                         (void *)fw_handle);
2329                 break;
2330         default:
2331                 DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
2332                        fw_event_code);
2333                 return -EINVAL;
2334         }
2335         return 0;
2336 }
2337
2338 int
2339 qed_iwarp_create_listen(void *rdma_cxt,
2340                         struct qed_iwarp_listen_in *iparams,
2341                         struct qed_iwarp_listen_out *oparams)
2342 {
2343         struct qed_hwfn *p_hwfn = rdma_cxt;
2344         struct qed_iwarp_listener *listener;
2345
2346         listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2347         if (!listener)
2348                 return -ENOMEM;
2349
2350         listener->ip_version = iparams->ip_version;
2351         memcpy(listener->ip_addr, iparams->ip_addr, sizeof(listener->ip_addr));
2352         listener->port = iparams->port;
2353         listener->vlan = iparams->vlan;
2354
2355         listener->event_cb = iparams->event_cb;
2356         listener->cb_context = iparams->cb_context;
2357         listener->max_backlog = iparams->max_backlog;
2358         oparams->handle = listener;
2359
2360         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2361         list_add_tail(&listener->list_entry,
2362                       &p_hwfn->p_rdma_info->iwarp.listen_list);
2363         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2364
2365         DP_VERBOSE(p_hwfn,
2366                    QED_MSG_RDMA,
2367                    "callback=%p handle=%p ip=%x:%x:%x:%x port=0x%x vlan=0x%x\n",
2368                    listener->event_cb,
2369                    listener,
2370                    listener->ip_addr[0],
2371                    listener->ip_addr[1],
2372                    listener->ip_addr[2],
2373                    listener->ip_addr[3], listener->port, listener->vlan);
2374
2375         return 0;
2376 }
2377
2378 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle)
2379 {
2380         struct qed_iwarp_listener *listener = handle;
2381         struct qed_hwfn *p_hwfn = rdma_cxt;
2382
2383         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "handle=%p\n", handle);
2384
2385         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2386         list_del(&listener->list_entry);
2387         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2388
2389         kfree(listener);
2390
2391         return 0;
2392 }
2393
2394 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams)
2395 {
2396         struct qed_hwfn *p_hwfn = rdma_cxt;
2397         struct qed_sp_init_data init_data;
2398         struct qed_spq_entry *p_ent;
2399         struct qed_iwarp_ep *ep;
2400         struct qed_rdma_qp *qp;
2401         int rc;
2402
2403         ep = iparams->ep_context;
2404         if (!ep) {
2405                 DP_ERR(p_hwfn, "Ep Context receive in send_rtr is NULL\n");
2406                 return -EINVAL;
2407         }
2408
2409         qp = ep->qp;
2410
2411         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
2412                    qp->icid, ep->tcp_cid);
2413
2414         memset(&init_data, 0, sizeof(init_data));
2415         init_data.cid = qp->icid;
2416         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
2417         init_data.comp_mode = QED_SPQ_MODE_CB;
2418
2419         rc = qed_sp_init_request(p_hwfn, &p_ent,
2420                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD_SEND_RTR,
2421                                  PROTOCOLID_IWARP, &init_data);
2422
2423         if (rc)
2424                 return rc;
2425
2426         rc = qed_spq_post(p_hwfn, p_ent, NULL);
2427
2428         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = 0x%x\n", rc);
2429
2430         return rc;
2431 }
2432
2433 void
2434 qed_iwarp_query_qp(struct qed_rdma_qp *qp,
2435                    struct qed_rdma_query_qp_out_params *out_params)
2436 {
2437         out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
2438 }