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 #include "qed_ooo.h"
  45
  46 #define QED_IWARP_ORD_DEFAULT           32
  47 #define QED_IWARP_IRD_DEFAULT           32
  48 #define QED_IWARP_MAX_FW_MSS            4120
  49
  50 #define QED_EP_SIG 0xecabcdef
  51
  52 struct mpa_v2_hdr {
  53         __be16 ird;
  54         __be16 ord;
  55 };
  56
  57 #define MPA_V2_PEER2PEER_MODEL  0x8000
  58 #define MPA_V2_SEND_RTR         0x4000  /* on ird */
  59 #define MPA_V2_READ_RTR         0x4000  /* on ord */
  60 #define MPA_V2_WRITE_RTR        0x8000
  61 #define MPA_V2_IRD_ORD_MASK     0x3FFF
  62
  63 #define MPA_REV2(_mpa_rev) ((_mpa_rev) == MPA_NEGOTIATION_TYPE_ENHANCED)
  64
  65 #define QED_IWARP_INVALID_TCP_CID       0xffffffff
  66 #define QED_IWARP_RCV_WND_SIZE_DEF      (256 * 1024)
  67 #define QED_IWARP_RCV_WND_SIZE_MIN      (0xffff)
  68 #define TIMESTAMP_HEADER_SIZE           (12)
  69 #define QED_IWARP_MAX_FIN_RT_DEFAULT    (2)
  70
  71 #define QED_IWARP_TS_EN                 BIT(0)
  72 #define QED_IWARP_DA_EN                 BIT(1)
  73 #define QED_IWARP_PARAM_CRC_NEEDED      (1)
  74 #define QED_IWARP_PARAM_P2P             (1)
  75
  76 #define QED_IWARP_DEF_MAX_RT_TIME       (0)
  77 #define QED_IWARP_DEF_CWND_FACTOR       (4)
  78 #define QED_IWARP_DEF_KA_MAX_PROBE_CNT  (5)
  79 #define QED_IWARP_DEF_KA_TIMEOUT        (1200000)       /* 20 min */
  80 #define QED_IWARP_DEF_KA_INTERVAL       (1000)          /* 1 sec */
  81
  82 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
  83                                  u8 fw_event_code, u16 echo,
  84                                  union event_ring_data *data,
  85                                  u8 fw_return_code);
  86
  87 /* Override devinfo with iWARP specific values */
  88 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
  89 {
  90         struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;
  91
  92         dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
  93         dev->max_qp = min_t(u32,
  94                             IWARP_MAX_QPS,
  95                             p_hwfn->p_rdma_info->num_qps) -
  96                       QED_IWARP_PREALLOC_CNT;
  97
  98         dev->max_cq = dev->max_qp;
  99
 100         dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
 101         dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
 102 }
 103
 104 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 105 {
 106         p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
 107         qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
 108         p_hwfn->b_rdma_enabled_in_prs = true;
 109 }
 110
 111 /* We have two cid maps, one for tcp which should be used only from passive
 112  * syn processing and replacing a pre-allocated ep in the list. The second
 113  * for active tcp and for QPs.
 114  */
 115 static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
 116 {
 117         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 118
 119         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 120
 121         if (cid < QED_IWARP_PREALLOC_CNT)
 122                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
 123                                     cid);
 124         else
 125                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 126
 127         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 128 }
 129
 130 void
 131 qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
 132                          struct iwarp_init_func_ramrod_data *p_ramrod)
 133 {
 134         p_ramrod->iwarp.ll2_ooo_q_index =
 135                 RESC_START(p_hwfn, QED_LL2_QUEUE) +
 136                 p_hwfn->p_rdma_info->iwarp.ll2_ooo_handle;
 137
 138         p_ramrod->tcp.max_fin_rt = QED_IWARP_MAX_FIN_RT_DEFAULT;
 139
 140         return;
 141 }
 142
 143 static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 144 {
 145         int rc;
 146
 147         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 148         rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 149         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 150         if (rc) {
 151                 DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
 152                 return rc;
 153         }
 154         *cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 155
 156         rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
 157         if (rc)
 158                 qed_iwarp_cid_cleaned(p_hwfn, *cid);
 159
 160         return rc;
 161 }
 162
 163 static void qed_iwarp_set_tcp_cid(struct qed_hwfn *p_hwfn, u32 cid)
 164 {
 165         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 166
 167         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 168         qed_bmap_set_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 169         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 170 }
 171
 172 /* This function allocates a cid for passive tcp (called from syn receive)
 173  * the reason it's separate from the regular cid allocation is because it
 174  * is assured that these cids already have ilt allocated. They are preallocated
 175  * to ensure that we won't need to allocate memory during syn processing
 176  */
 177 static int qed_iwarp_alloc_tcp_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 178 {
 179         int rc;
 180
 181         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 182
 183         rc = qed_rdma_bmap_alloc_id(p_hwfn,
 184                                     &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 185
 186         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 187
 188         if (rc) {
 189                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 190                            "can't allocate iwarp tcp cid max-count=%d\n",
 191                            p_hwfn->p_rdma_info->tcp_cid_map.max_count);
 192
 193                 *cid = QED_IWARP_INVALID_TCP_CID;
 194                 return rc;
 195         }
 196
 197         *cid += qed_cxt_get_proto_cid_start(p_hwfn,
 198                                             p_hwfn->p_rdma_info->proto);
 199         return 0;
 200 }
 201
 202 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
 203                         struct qed_rdma_qp *qp,
 204                         struct qed_rdma_create_qp_out_params *out_params)
 205 {
 206         struct iwarp_create_qp_ramrod_data *p_ramrod;
 207         struct qed_sp_init_data init_data;
 208         struct qed_spq_entry *p_ent;
 209         u16 physical_queue;
 210         u32 cid;
 211         int rc;
 212
 213         qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 214                                               IWARP_SHARED_QUEUE_PAGE_SIZE,
 215                                               &qp->shared_queue_phys_addr,
 216                                               GFP_KERNEL);
 217         if (!qp->shared_queue)
 218                 return -ENOMEM;
 219
 220         out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
 221             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 222         out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
 223             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 224         out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
 225             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 226         out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
 227             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 228
 229         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
 230         if (rc)
 231                 goto err1;
 232
 233         qp->icid = (u16)cid;
 234
 235         memset(&init_data, 0, sizeof(init_data));
 236         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 237         init_data.cid = qp->icid;
 238         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 239
 240         rc = qed_sp_init_request(p_hwfn, &p_ent,
 241                                  IWARP_RAMROD_CMD_ID_CREATE_QP,
 242                                  PROTOCOLID_IWARP, &init_data);
 243         if (rc)
 244                 goto err2;
 245
 246         p_ramrod = &p_ent->ramrod.iwarp_create_qp;
 247
 248         SET_FIELD(p_ramrod->flags,
 249                   IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
 250                   qp->fmr_and_reserved_lkey);
 251
 252         SET_FIELD(p_ramrod->flags,
 253                   IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);
 254
 255         SET_FIELD(p_ramrod->flags,
 256                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
 257                   qp->incoming_rdma_read_en);
 258
 259         SET_FIELD(p_ramrod->flags,
 260                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
 261                   qp->incoming_rdma_write_en);
 262
 263         SET_FIELD(p_ramrod->flags,
 264                   IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
 265                   qp->incoming_atomic_en);
 266
 267         SET_FIELD(p_ramrod->flags,
 268                   IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);
 269
 270         p_ramrod->pd = qp->pd;
 271         p_ramrod->sq_num_pages = qp->sq_num_pages;
 272         p_ramrod->rq_num_pages = qp->rq_num_pages;
 273
 274         p_ramrod->srq_id.srq_idx = cpu_to_le16(qp->srq_id);
 275         p_ramrod->srq_id.opaque_fid = cpu_to_le16(p_hwfn->hw_info.opaque_fid);
 276         p_ramrod->qp_handle_for_cqe.hi = cpu_to_le32(qp->qp_handle.hi);
 277         p_ramrod->qp_handle_for_cqe.lo = cpu_to_le32(qp->qp_handle.lo);
 278
 279         p_ramrod->cq_cid_for_sq =
 280             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
 281         p_ramrod->cq_cid_for_rq =
 282             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);
 283
 284         p_ramrod->dpi = cpu_to_le16(qp->dpi);
 285
 286         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 287         p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
 288         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 289         p_ramrod->physical_q1 = cpu_to_le16(physical_queue);
 290
 291         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 292         if (rc)
 293                 goto err2;
 294
 295         return rc;
 296
 297 err2:
 298         qed_iwarp_cid_cleaned(p_hwfn, cid);
 299 err1:
 300         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 301                           IWARP_SHARED_QUEUE_PAGE_SIZE,
 302                           qp->shared_queue, qp->shared_queue_phys_addr);
 303
 304         return rc;
 305 }
 306
 307 static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 308 {
 309         struct iwarp_modify_qp_ramrod_data *p_ramrod;
 310         struct qed_sp_init_data init_data;
 311         struct qed_spq_entry *p_ent;
 312         int rc;
 313
 314         /* Get SPQ entry */
 315         memset(&init_data, 0, sizeof(init_data));
 316         init_data.cid = qp->icid;
 317         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 318         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 319
 320         rc = qed_sp_init_request(p_hwfn, &p_ent,
 321                                  IWARP_RAMROD_CMD_ID_MODIFY_QP,
 322                                  p_hwfn->p_rdma_info->proto, &init_data);
 323         if (rc)
 324                 return rc;
 325
 326         p_ramrod = &p_ent->ramrod.iwarp_modify_qp;
 327         SET_FIELD(p_ramrod->flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN,
 328                   0x1);
 329         if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
 330                 p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
 331         else
 332                 p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_ERROR;
 333
 334         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 335
 336         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);
 337
 338         return rc;
 339 }
 340
 341 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
 342 {
 343         switch (state) {
 344         case QED_ROCE_QP_STATE_RESET:
 345         case QED_ROCE_QP_STATE_INIT:
 346         case QED_ROCE_QP_STATE_RTR:
 347                 return QED_IWARP_QP_STATE_IDLE;
 348         case QED_ROCE_QP_STATE_RTS:
 349                 return QED_IWARP_QP_STATE_RTS;
 350         case QED_ROCE_QP_STATE_SQD:
 351                 return QED_IWARP_QP_STATE_CLOSING;
 352         case QED_ROCE_QP_STATE_ERR:
 353                 return QED_IWARP_QP_STATE_ERROR;
 354         case QED_ROCE_QP_STATE_SQE:
 355                 return QED_IWARP_QP_STATE_TERMINATE;
 356         default:
 357                 return QED_IWARP_QP_STATE_ERROR;
 358         }
 359 }
 360
 361 static enum qed_roce_qp_state
 362 qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
 363 {
 364         switch (state) {
 365         case QED_IWARP_QP_STATE_IDLE:
 366                 return QED_ROCE_QP_STATE_INIT;
 367         case QED_IWARP_QP_STATE_RTS:
 368                 return QED_ROCE_QP_STATE_RTS;
 369         case QED_IWARP_QP_STATE_TERMINATE:
 370                 return QED_ROCE_QP_STATE_SQE;
 371         case QED_IWARP_QP_STATE_CLOSING:
 372                 return QED_ROCE_QP_STATE_SQD;
 373         case QED_IWARP_QP_STATE_ERROR:
 374                 return QED_ROCE_QP_STATE_ERR;
 375         default:
 376                 return QED_ROCE_QP_STATE_ERR;
 377         }
 378 }
 379
 380 const static char *iwarp_state_names[] = {
 381         "IDLE",
 382         "RTS",
 383         "TERMINATE",
 384         "CLOSING",
 385         "ERROR",
 386 };
 387
 388 int
 389 qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
 390                     struct qed_rdma_qp *qp,
 391                     enum qed_iwarp_qp_state new_state, bool internal)
 392 {
 393         enum qed_iwarp_qp_state prev_iw_state;
 394         bool modify_fw = false;
 395         int rc = 0;
 396
 397         /* modify QP can be called from upper-layer or as a result of async
 398          * RST/FIN... therefore need to protect
 399          */
 400         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 401         prev_iw_state = qp->iwarp_state;
 402
 403         if (prev_iw_state == new_state) {
 404                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 405                 return 0;
 406         }
 407
 408         switch (prev_iw_state) {
 409         case QED_IWARP_QP_STATE_IDLE:
 410                 switch (new_state) {
 411                 case QED_IWARP_QP_STATE_RTS:
 412                         qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
 413                         break;
 414                 case QED_IWARP_QP_STATE_ERROR:
 415                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 416                         if (!internal)
 417                                 modify_fw = true;
 418                         break;
 419                 default:
 420                         break;
 421                 }
 422                 break;
 423         case QED_IWARP_QP_STATE_RTS:
 424                 switch (new_state) {
 425                 case QED_IWARP_QP_STATE_CLOSING:
 426                         if (!internal)
 427                                 modify_fw = true;
 428
 429                         qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
 430                         break;
 431                 case QED_IWARP_QP_STATE_ERROR:
 432                         if (!internal)
 433                                 modify_fw = true;
 434                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 435                         break;
 436                 default:
 437                         break;
 438                 }
 439                 break;
 440         case QED_IWARP_QP_STATE_ERROR:
 441                 switch (new_state) {
 442                 case QED_IWARP_QP_STATE_IDLE:
 443
 444                         qp->iwarp_state = new_state;
 445                         break;
 446                 case QED_IWARP_QP_STATE_CLOSING:
 447                         /* could happen due to race... do nothing.... */
 448                         break;
 449                 default:
 450                         rc = -EINVAL;
 451                 }
 452                 break;
 453         case QED_IWARP_QP_STATE_TERMINATE:
 454         case QED_IWARP_QP_STATE_CLOSING:
 455                 qp->iwarp_state = new_state;
 456                 break;
 457         default:
 458                 break;
 459         }
 460
 461         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
 462                    qp->icid,
 463                    iwarp_state_names[prev_iw_state],
 464                    iwarp_state_names[qp->iwarp_state],
 465                    internal ? "internal" : "");
 466
 467         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 468
 469         if (modify_fw)
 470                 rc = qed_iwarp_modify_fw(p_hwfn, qp);
 471
 472         return rc;
 473 }
 474
 475 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 476 {
 477         struct qed_sp_init_data init_data;
 478         struct qed_spq_entry *p_ent;
 479         int rc;
 480
 481         /* Get SPQ entry */
 482         memset(&init_data, 0, sizeof(init_data));
 483         init_data.cid = qp->icid;
 484         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 485         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 486
 487         rc = qed_sp_init_request(p_hwfn, &p_ent,
 488                                  IWARP_RAMROD_CMD_ID_DESTROY_QP,
 489                                  p_hwfn->p_rdma_info->proto, &init_data);
 490         if (rc)
 491                 return rc;
 492
 493         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 494
 495         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);
 496
 497         return rc;
 498 }
 499
 500 static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
 501                                  struct qed_iwarp_ep *ep,
 502                                  bool remove_from_active_list)
 503 {
 504         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 505                           sizeof(*ep->ep_buffer_virt),
 506                           ep->ep_buffer_virt, ep->ep_buffer_phys);
 507
 508         if (remove_from_active_list) {
 509                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 510                 list_del(&ep->list_entry);
 511                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 512         }
 513
 514         if (ep->qp)
 515                 ep->qp->ep = NULL;
 516
 517         kfree(ep);
 518 }
 519
 520 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 521 {
 522         struct qed_iwarp_ep *ep = qp->ep;
 523         int wait_count = 0;
 524         int rc = 0;
 525
 526         if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
 527                 rc = qed_iwarp_modify_qp(p_hwfn, qp,
 528                                          QED_IWARP_QP_STATE_ERROR, false);
 529                 if (rc)
 530                         return rc;
 531         }
 532
 533         /* Make sure ep is closed before returning and freeing memory. */
 534         if (ep) {
 535                 while (ep->state != QED_IWARP_EP_CLOSED && wait_count++ < 200)
 536                         msleep(100);
 537
 538                 if (ep->state != QED_IWARP_EP_CLOSED)
 539                         DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
 540                                   ep->state);
 541
 542                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
 543         }
 544
 545         rc = qed_iwarp_fw_destroy(p_hwfn, qp);
 546
 547         if (qp->shared_queue)
 548                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 549                                   IWARP_SHARED_QUEUE_PAGE_SIZE,
 550                                   qp->shared_queue, qp->shared_queue_phys_addr);
 551
 552         return rc;
 553 }
 554
 555 static int
 556 qed_iwarp_create_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep **ep_out)
 557 {
 558         struct qed_iwarp_ep *ep;
 559         int rc;
 560
 561         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
 562         if (!ep)
 563                 return -ENOMEM;
 564
 565         ep->state = QED_IWARP_EP_INIT;
 566
 567         ep->ep_buffer_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 568                                                 sizeof(*ep->ep_buffer_virt),
 569                                                 &ep->ep_buffer_phys,
 570                                                 GFP_KERNEL);
 571         if (!ep->ep_buffer_virt) {
 572                 rc = -ENOMEM;
 573                 goto err;
 574         }
 575
 576         ep->sig = QED_EP_SIG;
 577
 578         *ep_out = ep;
 579
 580         return 0;
 581
 582 err:
 583         kfree(ep);
 584         return rc;
 585 }
 586
 587 static void
 588 qed_iwarp_print_tcp_ramrod(struct qed_hwfn *p_hwfn,
 589                            struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod)
 590 {
 591         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "local_mac=%x %x %x, remote_mac=%x %x %x\n",
 592                    p_tcp_ramrod->tcp.local_mac_addr_lo,
 593                    p_tcp_ramrod->tcp.local_mac_addr_mid,
 594                    p_tcp_ramrod->tcp.local_mac_addr_hi,
 595                    p_tcp_ramrod->tcp.remote_mac_addr_lo,
 596                    p_tcp_ramrod->tcp.remote_mac_addr_mid,
 597                    p_tcp_ramrod->tcp.remote_mac_addr_hi);
 598
 599         if (p_tcp_ramrod->tcp.ip_version == TCP_IPV4) {
 600                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 601                            "local_ip=%pI4h:%x, remote_ip=%pI4h:%x, vlan=%x\n",
 602                            p_tcp_ramrod->tcp.local_ip,
 603                            p_tcp_ramrod->tcp.local_port,
 604                            p_tcp_ramrod->tcp.remote_ip,
 605                            p_tcp_ramrod->tcp.remote_port,
 606                            p_tcp_ramrod->tcp.vlan_id);
 607         } else {
 608                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 609                            "local_ip=%pI6:%x, remote_ip=%pI6:%x, vlan=%x\n",
 610                            p_tcp_ramrod->tcp.local_ip,
 611                            p_tcp_ramrod->tcp.local_port,
 612                            p_tcp_ramrod->tcp.remote_ip,
 613                            p_tcp_ramrod->tcp.remote_port,
 614                            p_tcp_ramrod->tcp.vlan_id);
 615         }
 616
 617         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 618                    "flow_label=%x, ttl=%x, tos_or_tc=%x, mss=%x, rcv_wnd_scale=%x, connect_mode=%x, flags=%x\n",
 619                    p_tcp_ramrod->tcp.flow_label,
 620                    p_tcp_ramrod->tcp.ttl,
 621                    p_tcp_ramrod->tcp.tos_or_tc,
 622                    p_tcp_ramrod->tcp.mss,
 623                    p_tcp_ramrod->tcp.rcv_wnd_scale,
 624                    p_tcp_ramrod->tcp.connect_mode,
 625                    p_tcp_ramrod->tcp.flags);
 626
 627         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "syn_ip_payload_length=%x, lo=%x, hi=%x\n",
 628                    p_tcp_ramrod->tcp.syn_ip_payload_length,
 629                    p_tcp_ramrod->tcp.syn_phy_addr_lo,
 630                    p_tcp_ramrod->tcp.syn_phy_addr_hi);
 631 }
 632
 633 static int
 634 qed_iwarp_tcp_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 635 {
 636         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 637         struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod;
 638         struct tcp_offload_params_opt2 *tcp;
 639         struct qed_sp_init_data init_data;
 640         struct qed_spq_entry *p_ent;
 641         dma_addr_t async_output_phys;
 642         dma_addr_t in_pdata_phys;
 643         u16 physical_q;
 644         u8 tcp_flags;
 645         int rc;
 646         int i;
 647
 648         memset(&init_data, 0, sizeof(init_data));
 649         init_data.cid = ep->tcp_cid;
 650         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 651         if (ep->connect_mode == TCP_CONNECT_PASSIVE)
 652                 init_data.comp_mode = QED_SPQ_MODE_CB;
 653         else
 654                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 655
 656         rc = qed_sp_init_request(p_hwfn, &p_ent,
 657                                  IWARP_RAMROD_CMD_ID_TCP_OFFLOAD,
 658                                  PROTOCOLID_IWARP, &init_data);
 659         if (rc)
 660                 return rc;
 661
 662         p_tcp_ramrod = &p_ent->ramrod.iwarp_tcp_offload;
 663
 664         in_pdata_phys = ep->ep_buffer_phys +
 665                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 666         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.incoming_ulp_buffer.addr,
 667                        in_pdata_phys);
 668
 669         p_tcp_ramrod->iwarp.incoming_ulp_buffer.len =
 670             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 671
 672         async_output_phys = ep->ep_buffer_phys +
 673                             offsetof(struct qed_iwarp_ep_memory, async_output);
 674         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.async_eqe_output_buf,
 675                        async_output_phys);
 676
 677         p_tcp_ramrod->iwarp.handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 678         p_tcp_ramrod->iwarp.handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 679
 680         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 681         p_tcp_ramrod->iwarp.physical_q0 = cpu_to_le16(physical_q);
 682         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 683         p_tcp_ramrod->iwarp.physical_q1 = cpu_to_le16(physical_q);
 684         p_tcp_ramrod->iwarp.mpa_mode = iwarp_info->mpa_rev;
 685
 686         tcp = &p_tcp_ramrod->tcp;
 687         qed_set_fw_mac_addr(&tcp->remote_mac_addr_hi,
 688                             &tcp->remote_mac_addr_mid,
 689                             &tcp->remote_mac_addr_lo, ep->remote_mac_addr);
 690         qed_set_fw_mac_addr(&tcp->local_mac_addr_hi, &tcp->local_mac_addr_mid,
 691                             &tcp->local_mac_addr_lo, ep->local_mac_addr);
 692
 693         tcp->vlan_id = cpu_to_le16(ep->cm_info.vlan);
 694
 695         tcp_flags = p_hwfn->p_rdma_info->iwarp.tcp_flags;
 696         tcp->flags = 0;
 697         SET_FIELD(tcp->flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN,
 698                   !!(tcp_flags & QED_IWARP_TS_EN));
 699
 700         SET_FIELD(tcp->flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN,
 701                   !!(tcp_flags & QED_IWARP_DA_EN));
 702
 703         tcp->ip_version = ep->cm_info.ip_version;
 704
 705         for (i = 0; i < 4; i++) {
 706                 tcp->remote_ip[i] = cpu_to_le32(ep->cm_info.remote_ip[i]);
 707                 tcp->local_ip[i] = cpu_to_le32(ep->cm_info.local_ip[i]);
 708         }
 709
 710         tcp->remote_port = cpu_to_le16(ep->cm_info.remote_port);
 711         tcp->local_port = cpu_to_le16(ep->cm_info.local_port);
 712         tcp->mss = cpu_to_le16(ep->mss);
 713         tcp->flow_label = 0;
 714         tcp->ttl = 0x40;
 715         tcp->tos_or_tc = 0;
 716
 717         tcp->max_rt_time = QED_IWARP_DEF_MAX_RT_TIME;
 718         tcp->cwnd = QED_IWARP_DEF_CWND_FACTOR *  tcp->mss;
 719         tcp->ka_max_probe_cnt = QED_IWARP_DEF_KA_MAX_PROBE_CNT;
 720         tcp->ka_timeout = QED_IWARP_DEF_KA_TIMEOUT;
 721         tcp->ka_interval = QED_IWARP_DEF_KA_INTERVAL;
 722
 723         tcp->rcv_wnd_scale = (u8)p_hwfn->p_rdma_info->iwarp.rcv_wnd_scale;
 724         tcp->connect_mode = ep->connect_mode;
 725
 726         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 727                 tcp->syn_ip_payload_length =
 728                         cpu_to_le16(ep->syn_ip_payload_length);
 729                 tcp->syn_phy_addr_hi = DMA_HI_LE(ep->syn_phy_addr);
 730                 tcp->syn_phy_addr_lo = DMA_LO_LE(ep->syn_phy_addr);
 731         }
 732
 733         qed_iwarp_print_tcp_ramrod(p_hwfn, p_tcp_ramrod);
 734
 735         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 736
 737         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 738                    "EP(0x%x) Offload completed rc=%d\n", ep->tcp_cid, rc);
 739
 740         return rc;
 741 }
 742
 743 static void
 744 qed_iwarp_mpa_received(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 745 {
 746         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 747         struct qed_iwarp_cm_event_params params;
 748         struct mpa_v2_hdr *mpa_v2;
 749         union async_output *async_data;
 750         u16 mpa_ord, mpa_ird;
 751         u8 mpa_hdr_size = 0;
 752         u8 mpa_rev;
 753
 754         async_data = &ep->ep_buffer_virt->async_output;
 755
 756         mpa_rev = async_data->mpa_request.mpa_handshake_mode;
 757         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 758                    "private_data_len=%x handshake_mode=%x private_data=(%x)\n",
 759                    async_data->mpa_request.ulp_data_len,
 760                    mpa_rev, *((u32 *)(ep->ep_buffer_virt->in_pdata)));
 761
 762         if (mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
 763                 /* Read ord/ird values from private data buffer */
 764                 mpa_v2 = (struct mpa_v2_hdr *)ep->ep_buffer_virt->in_pdata;
 765                 mpa_hdr_size = sizeof(*mpa_v2);
 766
 767                 mpa_ord = ntohs(mpa_v2->ord);
 768                 mpa_ird = ntohs(mpa_v2->ird);
 769
 770                 /* Temprary store in cm_info incoming ord/ird requested, later
 771                  * replace with negotiated value during accept
 772                  */
 773                 ep->cm_info.ord = (u8)min_t(u16,
 774                                             (mpa_ord & MPA_V2_IRD_ORD_MASK),
 775                                             QED_IWARP_ORD_DEFAULT);
 776
 777                 ep->cm_info.ird = (u8)min_t(u16,
 778                                             (mpa_ird & MPA_V2_IRD_ORD_MASK),
 779                                             QED_IWARP_IRD_DEFAULT);
 780
 781                 /* Peer2Peer negotiation */
 782                 ep->rtr_type = MPA_RTR_TYPE_NONE;
 783                 if (mpa_ird & MPA_V2_PEER2PEER_MODEL) {
 784                         if (mpa_ord & MPA_V2_WRITE_RTR)
 785                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_WRITE;
 786
 787                         if (mpa_ord & MPA_V2_READ_RTR)
 788                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_READ;
 789
 790                         if (mpa_ird & MPA_V2_SEND_RTR)
 791                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_SEND;
 792
 793                         ep->rtr_type &= iwarp_info->rtr_type;
 794
 795                         /* if we're left with no match send our capabilities */
 796                         if (ep->rtr_type == MPA_RTR_TYPE_NONE)
 797                                 ep->rtr_type = iwarp_info->rtr_type;
 798                 }
 799
 800                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
 801         } else {
 802                 ep->cm_info.ord = QED_IWARP_ORD_DEFAULT;
 803                 ep->cm_info.ird = QED_IWARP_IRD_DEFAULT;
 804                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_BASIC;
 805         }
 806
 807         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 808                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x rtr:0x%x ulp_data_len = %x mpa_hdr_size = %x\n",
 809                    mpa_rev, ep->cm_info.ord, ep->cm_info.ird, ep->rtr_type,
 810                    async_data->mpa_request.ulp_data_len, mpa_hdr_size);
 811
 812         /* Strip mpa v2 hdr from private data before sending to upper layer */
 813         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_hdr_size;
 814
 815         ep->cm_info.private_data_len = async_data->mpa_request.ulp_data_len -
 816                                        mpa_hdr_size;
 817
 818         params.event = QED_IWARP_EVENT_MPA_REQUEST;
 819         params.cm_info = &ep->cm_info;
 820         params.ep_context = ep;
 821         params.status = 0;
 822
 823         ep->state = QED_IWARP_EP_MPA_REQ_RCVD;
 824         ep->event_cb(ep->cb_context, &params);
 825 }
 826
 827 static int
 828 qed_iwarp_mpa_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 829 {
 830         struct iwarp_mpa_offload_ramrod_data *p_mpa_ramrod;
 831         struct qed_iwarp_info *iwarp_info;
 832         struct qed_sp_init_data init_data;
 833         dma_addr_t async_output_phys;
 834         struct qed_spq_entry *p_ent;
 835         dma_addr_t out_pdata_phys;
 836         dma_addr_t in_pdata_phys;
 837         struct qed_rdma_qp *qp;
 838         bool reject;
 839         int rc;
 840
 841         if (!ep)
 842                 return -EINVAL;
 843
 844         qp = ep->qp;
 845         reject = !qp;
 846
 847         memset(&init_data, 0, sizeof(init_data));
 848         init_data.cid = reject ? ep->tcp_cid : qp->icid;
 849         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 850
 851         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
 852                 init_data.comp_mode = QED_SPQ_MODE_CB;
 853         else
 854                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 855
 856         rc = qed_sp_init_request(p_hwfn, &p_ent,
 857                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD,
 858                                  PROTOCOLID_IWARP, &init_data);
 859         if (rc)
 860                 return rc;
 861
 862         p_mpa_ramrod = &p_ent->ramrod.iwarp_mpa_offload;
 863         out_pdata_phys = ep->ep_buffer_phys +
 864                          offsetof(struct qed_iwarp_ep_memory, out_pdata);
 865         DMA_REGPAIR_LE(p_mpa_ramrod->common.outgoing_ulp_buffer.addr,
 866                        out_pdata_phys);
 867         p_mpa_ramrod->common.outgoing_ulp_buffer.len =
 868             ep->cm_info.private_data_len;
 869         p_mpa_ramrod->common.crc_needed = p_hwfn->p_rdma_info->iwarp.crc_needed;
 870
 871         p_mpa_ramrod->common.out_rq.ord = ep->cm_info.ord;
 872         p_mpa_ramrod->common.out_rq.ird = ep->cm_info.ird;
 873
 874         p_mpa_ramrod->tcp_cid = p_hwfn->hw_info.opaque_fid << 16 | ep->tcp_cid;
 875
 876         in_pdata_phys = ep->ep_buffer_phys +
 877                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 878         p_mpa_ramrod->tcp_connect_side = ep->connect_mode;
 879         DMA_REGPAIR_LE(p_mpa_ramrod->incoming_ulp_buffer.addr,
 880                        in_pdata_phys);
 881         p_mpa_ramrod->incoming_ulp_buffer.len =
 882             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 883         async_output_phys = ep->ep_buffer_phys +
 884                             offsetof(struct qed_iwarp_ep_memory, async_output);
 885         DMA_REGPAIR_LE(p_mpa_ramrod->async_eqe_output_buf,
 886                        async_output_phys);
 887         p_mpa_ramrod->handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 888         p_mpa_ramrod->handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 889
 890         if (!reject) {
 891                 DMA_REGPAIR_LE(p_mpa_ramrod->shared_queue_addr,
 892                                qp->shared_queue_phys_addr);
 893                 p_mpa_ramrod->stats_counter_id =
 894                     RESC_START(p_hwfn, QED_RDMA_STATS_QUEUE) + qp->stats_queue;
 895         } else {
 896                 p_mpa_ramrod->common.reject = 1;
 897         }
 898
 899         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 900         p_mpa_ramrod->rcv_wnd = iwarp_info->rcv_wnd_size;
 901         p_mpa_ramrod->mode = ep->mpa_rev;
 902         SET_FIELD(p_mpa_ramrod->rtr_pref,
 903                   IWARP_MPA_OFFLOAD_RAMROD_DATA_RTR_SUPPORTED, ep->rtr_type);
 904
 905         ep->state = QED_IWARP_EP_MPA_OFFLOADED;
 906         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 907         if (!reject)
 908                 ep->cid = qp->icid;     /* Now they're migrated. */
 909
 910         DP_VERBOSE(p_hwfn,
 911                    QED_MSG_RDMA,
 912                    "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",
 913                    reject ? 0xffff : qp->icid,
 914                    ep->tcp_cid,
 915                    rc,
 916                    ep->cm_info.ird,
 917                    ep->cm_info.ord, ep->rtr_type, ep->mpa_rev, reject);
 918         return rc;
 919 }
 920
 921 static void
 922 qed_iwarp_return_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 923 {
 924         ep->state = QED_IWARP_EP_INIT;
 925         if (ep->qp)
 926                 ep->qp->ep = NULL;
 927         ep->qp = NULL;
 928         memset(&ep->cm_info, 0, sizeof(ep->cm_info));
 929
 930         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
 931                 /* We don't care about the return code, it's ok if tcp_cid
 932                  * remains invalid...in this case we'll defer allocation
 933                  */
 934                 qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
 935         }
 936         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 937
 938         list_move_tail(&ep->list_entry,
 939                        &p_hwfn->p_rdma_info->iwarp.ep_free_list);
 940
 941         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 942 }
 943
 944 static void
 945 qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 946 {
 947         struct mpa_v2_hdr *mpa_v2_params;
 948         union async_output *async_data;
 949         u16 mpa_ird, mpa_ord;
 950         u8 mpa_data_size = 0;
 951
 952         if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
 953                 mpa_v2_params =
 954                         (struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
 955                 mpa_data_size = sizeof(*mpa_v2_params);
 956                 mpa_ird = ntohs(mpa_v2_params->ird);
 957                 mpa_ord = ntohs(mpa_v2_params->ord);
 958
 959                 ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
 960                 ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
 961         }
 962         async_data = &ep->ep_buffer_virt->async_output;
 963
 964         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;
 965         ep->cm_info.private_data_len = async_data->mpa_response.ulp_data_len -
 966                                        mpa_data_size;
 967 }
 968
 969 static void
 970 qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 971 {
 972         struct qed_iwarp_cm_event_params params;
 973
 974         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 975                 DP_NOTICE(p_hwfn,
 976                           "MPA reply event not expected on passive side!\n");
 977                 return;
 978         }
 979
 980         params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;
 981
 982         qed_iwarp_parse_private_data(p_hwfn, ep);
 983
 984         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 985                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
 986                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
 987
 988         params.cm_info = &ep->cm_info;
 989         params.ep_context = ep;
 990         params.status = 0;
 991
 992         ep->mpa_reply_processed = true;
 993
 994         ep->event_cb(ep->cb_context, &params);
 995 }
 996
 997 #define QED_IWARP_CONNECT_MODE_STRING(ep) \
 998         ((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"
 999
1000 /* Called as a result of the event:
1001  * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
1002  */
1003 static void
1004 qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
1005                        struct qed_iwarp_ep *ep, u8 fw_return_code)
1006 {
1007         struct qed_iwarp_cm_event_params params;
1008
1009         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
1010                 params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
1011         else
1012                 params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;
1013
1014         if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
1015                 qed_iwarp_parse_private_data(p_hwfn, ep);
1016
1017         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1018                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
1019                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
1020
1021         params.cm_info = &ep->cm_info;
1022
1023         params.ep_context = ep;
1024
1025         ep->state = QED_IWARP_EP_CLOSED;
1026
1027         switch (fw_return_code) {
1028         case RDMA_RETURN_OK:
1029                 ep->qp->max_rd_atomic_req = ep->cm_info.ord;
1030                 ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
1031                 qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
1032                 ep->state = QED_IWARP_EP_ESTABLISHED;
1033                 params.status = 0;
1034                 break;
1035         case IWARP_CONN_ERROR_MPA_TIMEOUT:
1036                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
1037                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1038                 params.status = -EBUSY;
1039                 break;
1040         case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
1041                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
1042                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1043                 params.status = -ECONNREFUSED;
1044                 break;
1045         case IWARP_CONN_ERROR_MPA_RST:
1046                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
1047                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
1048                           ep->tcp_cid);
1049                 params.status = -ECONNRESET;
1050                 break;
1051         case IWARP_CONN_ERROR_MPA_FIN:
1052                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
1053                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1054                 params.status = -ECONNREFUSED;
1055                 break;
1056         case IWARP_CONN_ERROR_MPA_INSUF_IRD:
1057                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
1058                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1059                 params.status = -ECONNREFUSED;
1060                 break;
1061         case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
1062                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
1063                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1064                 params.status = -ECONNREFUSED;
1065                 break;
1066         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
1067                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
1068                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1069                 params.status = -ECONNREFUSED;
1070                 break;
1071         case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
1072                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
1073                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1074                 params.status = -ECONNREFUSED;
1075                 break;
1076         case IWARP_CONN_ERROR_MPA_TERMINATE:
1077                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
1078                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1079                 params.status = -ECONNREFUSED;
1080                 break;
1081         default:
1082                 params.status = -ECONNRESET;
1083                 break;
1084         }
1085
1086         ep->event_cb(ep->cb_context, &params);
1087
1088         /* on passive side, if there is no associated QP (REJECT) we need to
1089          * return the ep to the pool, (in the regular case we add an element
1090          * in accept instead of this one.
1091          * In both cases we need to remove it from the ep_list.
1092          */
1093         if (fw_return_code != RDMA_RETURN_OK) {
1094                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1095                 if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
1096                     (!ep->qp)) {        /* Rejected */
1097                         qed_iwarp_return_ep(p_hwfn, ep);
1098                 } else {
1099                         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1100                         list_del(&ep->list_entry);
1101                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1102                 }
1103         }
1104 }
1105
1106 static void
1107 qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
1108                              struct qed_iwarp_ep *ep, u8 *mpa_data_size)
1109 {
1110         struct mpa_v2_hdr *mpa_v2_params;
1111         u16 mpa_ird, mpa_ord;
1112
1113         *mpa_data_size = 0;
1114         if (MPA_REV2(ep->mpa_rev)) {
1115                 mpa_v2_params =
1116                     (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
1117                 *mpa_data_size = sizeof(*mpa_v2_params);
1118
1119                 mpa_ird = (u16)ep->cm_info.ird;
1120                 mpa_ord = (u16)ep->cm_info.ord;
1121
1122                 if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
1123                         mpa_ird |= MPA_V2_PEER2PEER_MODEL;
1124
1125                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
1126                                 mpa_ird |= MPA_V2_SEND_RTR;
1127
1128                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
1129                                 mpa_ord |= MPA_V2_WRITE_RTR;
1130
1131                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
1132                                 mpa_ord |= MPA_V2_READ_RTR;
1133                 }
1134
1135                 mpa_v2_params->ird = htons(mpa_ird);
1136                 mpa_v2_params->ord = htons(mpa_ord);
1137
1138                 DP_VERBOSE(p_hwfn,
1139                            QED_MSG_RDMA,
1140                            "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
1141                            mpa_v2_params->ird,
1142                            mpa_v2_params->ord,
1143                            *((u32 *)mpa_v2_params),
1144                            mpa_ord & MPA_V2_IRD_ORD_MASK,
1145                            mpa_ird & MPA_V2_IRD_ORD_MASK,
1146                            !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
1147                            !!(mpa_ird & MPA_V2_SEND_RTR),
1148                            !!(mpa_ord & MPA_V2_WRITE_RTR),
1149                            !!(mpa_ord & MPA_V2_READ_RTR));
1150         }
1151 }
1152
1153 int qed_iwarp_connect(void *rdma_cxt,
1154                       struct qed_iwarp_connect_in *iparams,
1155                       struct qed_iwarp_connect_out *oparams)
1156 {
1157         struct qed_hwfn *p_hwfn = rdma_cxt;
1158         struct qed_iwarp_info *iwarp_info;
1159         struct qed_iwarp_ep *ep;
1160         u8 mpa_data_size = 0;
1161         u32 cid;
1162         int rc;
1163
1164         if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
1165             (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
1166                 DP_NOTICE(p_hwfn,
1167                           "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1168                           iparams->qp->icid, iparams->cm_info.ord,
1169                           iparams->cm_info.ird);
1170
1171                 return -EINVAL;
1172         }
1173
1174         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1175
1176         /* Allocate ep object */
1177         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1178         if (rc)
1179                 return rc;
1180
1181         rc = qed_iwarp_create_ep(p_hwfn, &ep);
1182         if (rc)
1183                 goto err;
1184
1185         ep->tcp_cid = cid;
1186
1187         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1188         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1189         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1190
1191         ep->qp = iparams->qp;
1192         ep->qp->ep = ep;
1193         ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
1194         ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
1195         memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));
1196
1197         ep->cm_info.ord = iparams->cm_info.ord;
1198         ep->cm_info.ird = iparams->cm_info.ird;
1199
1200         ep->rtr_type = iwarp_info->rtr_type;
1201         if (!iwarp_info->peer2peer)
1202                 ep->rtr_type = MPA_RTR_TYPE_NONE;
1203
1204         if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
1205                 ep->cm_info.ord = 1;
1206
1207         ep->mpa_rev = iwarp_info->mpa_rev;
1208
1209         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1210
1211         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1212         ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
1213                                        mpa_data_size;
1214
1215         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1216                iparams->cm_info.private_data,
1217                iparams->cm_info.private_data_len);
1218
1219         ep->mss = iparams->mss;
1220         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1221
1222         ep->event_cb = iparams->event_cb;
1223         ep->cb_context = iparams->cb_context;
1224         ep->connect_mode = TCP_CONNECT_ACTIVE;
1225
1226         oparams->ep_context = ep;
1227
1228         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1229
1230         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
1231                    iparams->qp->icid, ep->tcp_cid, rc);
1232
1233         if (rc) {
1234                 qed_iwarp_destroy_ep(p_hwfn, ep, true);
1235                 goto err;
1236         }
1237
1238         return rc;
1239 err:
1240         qed_iwarp_cid_cleaned(p_hwfn, cid);
1241
1242         return rc;
1243 }
1244
1245 static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
1246 {
1247         struct qed_iwarp_ep *ep = NULL;
1248         int rc;
1249
1250         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1251
1252         if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1253                 DP_ERR(p_hwfn, "Ep list is empty\n");
1254                 goto out;
1255         }
1256
1257         ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1258                               struct qed_iwarp_ep, list_entry);
1259
1260         /* in some cases we could have failed allocating a tcp cid when added
1261          * from accept / failure... retry now..this is not the common case.
1262          */
1263         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
1264                 rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
1265
1266                 /* if we fail we could look for another entry with a valid
1267                  * tcp_cid, but since we don't expect to reach this anyway
1268                  * it's not worth the handling
1269                  */
1270                 if (rc) {
1271                         ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1272                         ep = NULL;
1273                         goto out;
1274                 }
1275         }
1276
1277         list_del(&ep->list_entry);
1278
1279 out:
1280         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1281         return ep;
1282 }
1283
1284 #define QED_IWARP_MAX_CID_CLEAN_TIME  100
1285 #define QED_IWARP_MAX_NO_PROGRESS_CNT 5
1286
1287 /* This function waits for all the bits of a bmap to be cleared, as long as
1288  * there is progress ( i.e. the number of bits left to be cleared decreases )
1289  * the function continues.
1290  */
1291 static int
1292 qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
1293 {
1294         int prev_weight = 0;
1295         int wait_count = 0;
1296         int weight = 0;
1297
1298         weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1299         prev_weight = weight;
1300
1301         while (weight) {
1302                 msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
1303
1304                 weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1305
1306                 if (prev_weight == weight) {
1307                         wait_count++;
1308                 } else {
1309                         prev_weight = weight;
1310                         wait_count = 0;
1311                 }
1312
1313                 if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
1314                         DP_NOTICE(p_hwfn,
1315                                   "%s bitmap wait timed out (%d cids pending)\n",
1316                                   bmap->name, weight);
1317                         return -EBUSY;
1318                 }
1319         }
1320         return 0;
1321 }
1322
1323 static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
1324 {
1325         int rc;
1326         int i;
1327
1328         rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
1329                                             &p_hwfn->p_rdma_info->tcp_cid_map);
1330         if (rc)
1331                 return rc;
1332
1333         /* Now free the tcp cids from the main cid map */
1334         for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
1335                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);
1336
1337         /* Now wait for all cids to be completed */
1338         return qed_iwarp_wait_cid_map_cleared(p_hwfn,
1339                                               &p_hwfn->p_rdma_info->cid_map);
1340 }
1341
1342 static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
1343 {
1344         struct qed_iwarp_ep *ep;
1345
1346         while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1347                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1348
1349                 ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1350                                       struct qed_iwarp_ep, list_entry);
1351
1352                 if (!ep) {
1353                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1354                         break;
1355                 }
1356                 list_del(&ep->list_entry);
1357
1358                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1359
1360                 if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
1361                         qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);
1362
1363                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
1364         }
1365 }
1366
1367 static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
1368 {
1369         struct qed_iwarp_ep *ep;
1370         int rc = 0;
1371         int count;
1372         u32 cid;
1373         int i;
1374
1375         count = init ? QED_IWARP_PREALLOC_CNT : 1;
1376         for (i = 0; i < count; i++) {
1377                 rc = qed_iwarp_create_ep(p_hwfn, &ep);
1378                 if (rc)
1379                         return rc;
1380
1381                 /* During initialization we allocate from the main pool,
1382                  * afterwards we allocate only from the tcp_cid.
1383                  */
1384                 if (init) {
1385                         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1386                         if (rc)
1387                                 goto err;
1388                         qed_iwarp_set_tcp_cid(p_hwfn, cid);
1389                 } else {
1390                         /* We don't care about the return code, it's ok if
1391                          * tcp_cid remains invalid...in this case we'll
1392                          * defer allocation
1393                          */
1394                         qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
1395                 }
1396
1397                 ep->tcp_cid = cid;
1398
1399                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1400                 list_add_tail(&ep->list_entry,
1401                               &p_hwfn->p_rdma_info->iwarp.ep_free_list);
1402                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1403         }
1404
1405         return rc;
1406
1407 err:
1408         qed_iwarp_destroy_ep(p_hwfn, ep, false);
1409
1410         return rc;
1411 }
1412
1413 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
1414 {
1415         int rc;
1416
1417         /* Allocate bitmap for tcp cid. These are used by passive side
1418          * to ensure it can allocate a tcp cid during dpc that was
1419          * pre-acquired and doesn't require dynamic allocation of ilt
1420          */
1421         rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
1422                                  QED_IWARP_PREALLOC_CNT, "TCP_CID");
1423         if (rc) {
1424                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1425                            "Failed to allocate tcp cid, rc = %d\n", rc);
1426                 return rc;
1427         }
1428
1429         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
1430         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1431
1432         rc = qed_iwarp_prealloc_ep(p_hwfn, true);
1433         if (rc)
1434                 return rc;
1435
1436         return qed_ooo_alloc(p_hwfn);
1437 }
1438
1439 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
1440 {
1441         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1442
1443         qed_ooo_free(p_hwfn);
1444         qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
1445         kfree(iwarp_info->mpa_bufs);
1446         kfree(iwarp_info->partial_fpdus);
1447         kfree(iwarp_info->mpa_intermediate_buf);
1448 }
1449
1450 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
1451 {
1452         struct qed_hwfn *p_hwfn = rdma_cxt;
1453         struct qed_iwarp_ep *ep;
1454         u8 mpa_data_size = 0;
1455         int rc;
1456
1457         ep = iparams->ep_context;
1458         if (!ep) {
1459                 DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
1460                 return -EINVAL;
1461         }
1462
1463         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
1464                    iparams->qp->icid, ep->tcp_cid);
1465
1466         if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
1467             (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
1468                 DP_VERBOSE(p_hwfn,
1469                            QED_MSG_RDMA,
1470                            "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1471                            iparams->qp->icid,
1472                            ep->tcp_cid, iparams->ord, iparams->ord);
1473                 return -EINVAL;
1474         }
1475
1476         qed_iwarp_prealloc_ep(p_hwfn, false);
1477
1478         ep->cb_context = iparams->cb_context;
1479         ep->qp = iparams->qp;
1480         ep->qp->ep = ep;
1481
1482         if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
1483                 /* Negotiate ord/ird: if upperlayer requested ord larger than
1484                  * ird advertised by remote, we need to decrease our ord
1485                  */
1486                 if (iparams->ord > ep->cm_info.ird)
1487                         iparams->ord = ep->cm_info.ird;
1488
1489                 if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
1490                     (iparams->ird == 0))
1491                         iparams->ird = 1;
1492         }
1493
1494         /* Update cm_info ord/ird to be negotiated values */
1495         ep->cm_info.ord = iparams->ord;
1496         ep->cm_info.ird = iparams->ird;
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         rc = qed_iwarp_mpa_offload(p_hwfn, ep);
1508         if (rc)
1509                 qed_iwarp_modify_qp(p_hwfn,
1510                                     iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);
1511
1512         return rc;
1513 }
1514
1515 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
1516 {
1517         struct qed_hwfn *p_hwfn = rdma_cxt;
1518         struct qed_iwarp_ep *ep;
1519         u8 mpa_data_size = 0;
1520
1521         ep = iparams->ep_context;
1522         if (!ep) {
1523                 DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
1524                 return -EINVAL;
1525         }
1526
1527         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);
1528
1529         ep->cb_context = iparams->cb_context;
1530         ep->qp = NULL;
1531
1532         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1533
1534         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1535         ep->cm_info.private_data_len = iparams->private_data_len +
1536                                        mpa_data_size;
1537
1538         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1539                iparams->private_data, iparams->private_data_len);
1540
1541         return qed_iwarp_mpa_offload(p_hwfn, ep);
1542 }
1543
1544 static void
1545 qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
1546                         struct qed_iwarp_cm_info *cm_info)
1547 {
1548         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
1549                    cm_info->ip_version);
1550
1551         if (cm_info->ip_version == QED_TCP_IPV4)
1552                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1553                            "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
1554                            cm_info->remote_ip, cm_info->remote_port,
1555                            cm_info->local_ip, cm_info->local_port,
1556                            cm_info->vlan);
1557         else
1558                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1559                            "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
1560                            cm_info->remote_ip, cm_info->remote_port,
1561                            cm_info->local_ip, cm_info->local_port,
1562                            cm_info->vlan);
1563
1564         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1565                    "private_data_len = %x ord = %d, ird = %d\n",
1566                    cm_info->private_data_len, cm_info->ord, cm_info->ird);
1567 }
1568
1569 static int
1570 qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
1571                       struct qed_iwarp_ll2_buff *buf, u8 handle)
1572 {
1573         int rc;
1574
1575         rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
1576                                     (u16)buf->buff_size, buf, 1);
1577         if (rc) {
1578                 DP_NOTICE(p_hwfn,
1579                           "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
1580                           rc, handle);
1581                 dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
1582                                   buf->data, buf->data_phys_addr);
1583                 kfree(buf);
1584         }
1585
1586         return rc;
1587 }
1588
1589 static bool
1590 qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
1591 {
1592         struct qed_iwarp_ep *ep = NULL;
1593         bool found = false;
1594
1595         list_for_each_entry(ep,
1596                             &p_hwfn->p_rdma_info->iwarp.ep_list,
1597                             list_entry) {
1598                 if ((ep->cm_info.local_port == cm_info->local_port) &&
1599                     (ep->cm_info.remote_port == cm_info->remote_port) &&
1600                     (ep->cm_info.vlan == cm_info->vlan) &&
1601                     !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
1602                             sizeof(cm_info->local_ip)) &&
1603                     !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
1604                             sizeof(cm_info->remote_ip))) {
1605                         found = true;
1606                         break;
1607                 }
1608         }
1609
1610         if (found) {
1611                 DP_NOTICE(p_hwfn,
1612                           "SYN received on active connection - dropping\n");
1613                 qed_iwarp_print_cm_info(p_hwfn, cm_info);
1614
1615                 return true;
1616         }
1617
1618         return false;
1619 }
1620
1621 static struct qed_iwarp_listener *
1622 qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
1623                        struct qed_iwarp_cm_info *cm_info)
1624 {
1625         struct qed_iwarp_listener *listener = NULL;
1626         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1627         bool found = false;
1628
1629         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1630
1631         list_for_each_entry(listener,
1632                             &p_hwfn->p_rdma_info->iwarp.listen_list,
1633                             list_entry) {
1634                 if (listener->port == cm_info->local_port) {
1635                         if (!memcmp(listener->ip_addr,
1636                                     ip_zero, sizeof(ip_zero))) {
1637                                 found = true;
1638                                 break;
1639                         }
1640
1641                         if (!memcmp(listener->ip_addr,
1642                                     cm_info->local_ip,
1643                                     sizeof(cm_info->local_ip)) &&
1644                             (listener->vlan == cm_info->vlan)) {
1645                                 found = true;
1646                                 break;
1647                         }
1648                 }
1649         }
1650
1651         if (found) {
1652                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
1653                            listener);
1654                 return listener;
1655         }
1656
1657         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
1658         return NULL;
1659 }
1660
1661 static int
1662 qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
1663                        struct qed_iwarp_cm_info *cm_info,
1664                        void *buf,
1665                        u8 *remote_mac_addr,
1666                        u8 *local_mac_addr,
1667                        int *payload_len, int *tcp_start_offset)
1668 {
1669         struct vlan_ethhdr *vethh;
1670         bool vlan_valid = false;
1671         struct ipv6hdr *ip6h;
1672         struct ethhdr *ethh;
1673         struct tcphdr *tcph;
1674         struct iphdr *iph;
1675         int eth_hlen;
1676         int ip_hlen;
1677         int eth_type;
1678         int i;
1679
1680         ethh = buf;
1681         eth_type = ntohs(ethh->h_proto);
1682         if (eth_type == ETH_P_8021Q) {
1683                 vlan_valid = true;
1684                 vethh = (struct vlan_ethhdr *)ethh;
1685                 cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
1686                 eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
1687         }
1688
1689         eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);
1690
1691         ether_addr_copy(remote_mac_addr, ethh->h_source);
1692         ether_addr_copy(local_mac_addr, ethh->h_dest);
1693
1694         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
1695                    eth_type, ethh->h_source);
1696
1697         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
1698                    eth_hlen, ethh->h_dest);
1699
1700         iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
1701
1702         if (eth_type == ETH_P_IP) {
1703                 if (iph->protocol != IPPROTO_TCP) {
1704                         DP_NOTICE(p_hwfn,
1705                                   "Unexpected ip protocol on ll2 %x\n",
1706                                   iph->protocol);
1707                         return -EINVAL;
1708                 }
1709
1710                 cm_info->local_ip[0] = ntohl(iph->daddr);
1711                 cm_info->remote_ip[0] = ntohl(iph->saddr);
1712                 cm_info->ip_version = QED_TCP_IPV4;
1713
1714                 ip_hlen = (iph->ihl) * sizeof(u32);
1715                 *payload_len = ntohs(iph->tot_len) - ip_hlen;
1716         } else if (eth_type == ETH_P_IPV6) {
1717                 ip6h = (struct ipv6hdr *)iph;
1718
1719                 if (ip6h->nexthdr != IPPROTO_TCP) {
1720                         DP_NOTICE(p_hwfn,
1721                                   "Unexpected ip protocol on ll2 %x\n",
1722                                   iph->protocol);
1723                         return -EINVAL;
1724                 }
1725
1726                 for (i = 0; i < 4; i++) {
1727                         cm_info->local_ip[i] =
1728                             ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
1729                         cm_info->remote_ip[i] =
1730                             ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
1731                 }
1732                 cm_info->ip_version = QED_TCP_IPV6;
1733
1734                 ip_hlen = sizeof(*ip6h);
1735                 *payload_len = ntohs(ip6h->payload_len);
1736         } else {
1737                 DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
1738                 return -EINVAL;
1739         }
1740
1741         tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);
1742
1743         if (!tcph->syn) {
1744                 DP_NOTICE(p_hwfn,
1745                           "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
1746                           iph->ihl, tcph->source, tcph->dest);
1747                 return -EINVAL;
1748         }
1749
1750         cm_info->local_port = ntohs(tcph->dest);
1751         cm_info->remote_port = ntohs(tcph->source);
1752
1753         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1754
1755         *tcp_start_offset = eth_hlen + ip_hlen;
1756
1757         return 0;
1758 }
1759
1760 static struct qed_iwarp_fpdu *qed_iwarp_get_curr_fpdu(struct qed_hwfn *p_hwfn,
1761                                                       u16 cid)
1762 {
1763         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1764         struct qed_iwarp_fpdu *partial_fpdu;
1765         u32 idx;
1766
1767         idx = cid - qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_IWARP);
1768         if (idx >= iwarp_info->max_num_partial_fpdus) {
1769                 DP_ERR(p_hwfn, "Invalid cid %x max_num_partial_fpdus=%x\n", cid,
1770                        iwarp_info->max_num_partial_fpdus);
1771                 return NULL;
1772         }
1773
1774         partial_fpdu = &iwarp_info->partial_fpdus[idx];
1775
1776         return partial_fpdu;
1777 }
1778
1779 enum qed_iwarp_mpa_pkt_type {
1780         QED_IWARP_MPA_PKT_PACKED,
1781         QED_IWARP_MPA_PKT_PARTIAL,
1782         QED_IWARP_MPA_PKT_UNALIGNED
1783 };
1784
1785 #define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
1786 #define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
1787 #define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)
1788
1789 /* Pad to multiple of 4 */
1790 #define QED_IWARP_PDU_DATA_LEN_WITH_PAD(data_len) ALIGN(data_len, 4)
1791 #define QED_IWARP_FPDU_LEN_WITH_PAD(_mpa_len)                              \
1792         (QED_IWARP_PDU_DATA_LEN_WITH_PAD((_mpa_len) +                      \
1793                                          QED_IWARP_MPA_FPDU_LENGTH_SIZE) + \
1794                                          QED_IWARP_MPA_CRC32_DIGEST_SIZE)
1795
1796 /* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
1797 #define QED_IWARP_MAX_BDS_PER_FPDU 3
1798
1799 static const char * const pkt_type_str[] = {
1800         "QED_IWARP_MPA_PKT_PACKED",
1801         "QED_IWARP_MPA_PKT_PARTIAL",
1802         "QED_IWARP_MPA_PKT_UNALIGNED"
1803 };
1804
1805 static int
1806 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1807                       struct qed_iwarp_fpdu *fpdu,
1808                       struct qed_iwarp_ll2_buff *buf);
1809
1810 static enum qed_iwarp_mpa_pkt_type
1811 qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
1812                        struct qed_iwarp_fpdu *fpdu,
1813                        u16 tcp_payload_len, u8 *mpa_data)
1814 {
1815         enum qed_iwarp_mpa_pkt_type pkt_type;
1816         u16 mpa_len;
1817
1818         if (fpdu->incomplete_bytes) {
1819                 pkt_type = QED_IWARP_MPA_PKT_UNALIGNED;
1820                 goto out;
1821         }
1822
1823         /* special case of one byte remaining...
1824          * lower byte will be read next packet
1825          */
1826         if (tcp_payload_len == 1) {
1827                 fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
1828                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1829                 goto out;
1830         }
1831
1832         mpa_len = ntohs(*((u16 *)(mpa_data)));
1833         fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1834
1835         if (fpdu->fpdu_length <= tcp_payload_len)
1836                 pkt_type = QED_IWARP_MPA_PKT_PACKED;
1837         else
1838                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1839
1840 out:
1841         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1842                    "MPA_ALIGN: %s: fpdu_length=0x%x tcp_payload_len:0x%x\n",
1843                    pkt_type_str[pkt_type], fpdu->fpdu_length, tcp_payload_len);
1844
1845         return pkt_type;
1846 }
1847
1848 static void
1849 qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
1850                     struct qed_iwarp_fpdu *fpdu,
1851                     struct unaligned_opaque_data *pkt_data,
1852                     u16 tcp_payload_size, u8 placement_offset)
1853 {
1854         fpdu->mpa_buf = buf;
1855         fpdu->pkt_hdr = buf->data_phys_addr + placement_offset;
1856         fpdu->pkt_hdr_size = pkt_data->tcp_payload_offset;
1857         fpdu->mpa_frag = buf->data_phys_addr + pkt_data->first_mpa_offset;
1858         fpdu->mpa_frag_virt = (u8 *)(buf->data) + pkt_data->first_mpa_offset;
1859
1860         if (tcp_payload_size == 1)
1861                 fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
1862         else if (tcp_payload_size < fpdu->fpdu_length)
1863                 fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
1864         else
1865                 fpdu->incomplete_bytes = 0;     /* complete fpdu */
1866
1867         fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
1868 }
1869
1870 static int
1871 qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn,
1872                  struct qed_iwarp_fpdu *fpdu,
1873                  struct unaligned_opaque_data *pkt_data,
1874                  struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size)
1875 {
1876         u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf;
1877         int rc;
1878
1879         /* need to copy the data from the partial packet stored in fpdu
1880          * to the new buf, for this we also need to move the data currently
1881          * placed on the buf. The assumption is that the buffer is big enough
1882          * since fpdu_length <= mss, we use an intermediate buffer since
1883          * we may need to copy the new data to an overlapping location
1884          */
1885         if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) {
1886                 DP_ERR(p_hwfn,
1887                        "MPA ALIGN: Unexpected: buffer is not large enough for split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1888                        buf->buff_size, fpdu->mpa_frag_len,
1889                        tcp_payload_size, fpdu->incomplete_bytes);
1890                 return -EINVAL;
1891         }
1892
1893         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1894                    "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n",
1895                    fpdu->mpa_frag_virt, fpdu->mpa_frag_len,
1896                    (u8 *)(buf->data) + pkt_data->first_mpa_offset,
1897                    tcp_payload_size);
1898
1899         memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len);
1900         memcpy(tmp_buf + fpdu->mpa_frag_len,
1901                (u8 *)(buf->data) + pkt_data->first_mpa_offset,
1902                tcp_payload_size);
1903
1904         rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf);
1905         if (rc)
1906                 return rc;
1907
1908         /* If we managed to post the buffer copy the data to the new buffer
1909          * o/w this will occur in the next round...
1910          */
1911         memcpy((u8 *)(buf->data), tmp_buf,
1912                fpdu->mpa_frag_len + tcp_payload_size);
1913
1914         fpdu->mpa_buf = buf;
1915         /* fpdu->pkt_hdr remains as is */
1916         /* fpdu->mpa_frag is overridden with new buf */
1917         fpdu->mpa_frag = buf->data_phys_addr;
1918         fpdu->mpa_frag_virt = buf->data;
1919         fpdu->mpa_frag_len += tcp_payload_size;
1920
1921         fpdu->incomplete_bytes -= tcp_payload_size;
1922
1923         DP_VERBOSE(p_hwfn,
1924                    QED_MSG_RDMA,
1925                    "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1926                    buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size,
1927                    fpdu->incomplete_bytes);
1928
1929         return 0;
1930 }
1931
1932 static void
1933 qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
1934                              struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
1935 {
1936         u16 mpa_len;
1937
1938         /* Update incomplete packets if needed */
1939         if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
1940                 /* Missing lower byte is now available */
1941                 mpa_len = fpdu->fpdu_length | *mpa_data;
1942                 fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1943                 /* one byte of hdr */
1944                 fpdu->mpa_frag_len = 1;
1945                 fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
1946                 DP_VERBOSE(p_hwfn,
1947                            QED_MSG_RDMA,
1948                            "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
1949                            mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
1950         }
1951 }
1952
1953 #define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \
1954         (GET_FIELD((_curr_pkt)->flags,     \
1955                    UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE))
1956
1957 /* This function is used to recycle a buffer using the ll2 drop option. It
1958  * uses the mechanism to ensure that all buffers posted to tx before this one
1959  * were completed. The buffer sent here will be sent as a cookie in the tx
1960  * completion function and can then be reposted to rx chain when done. The flow
1961  * that requires this is the flow where a FPDU splits over more than 3 tcp
1962  * segments. In this case the driver needs to re-post a rx buffer instead of
1963  * the one received, but driver can't simply repost a buffer it copied from
1964  * as there is a case where the buffer was originally a packed FPDU, and is
1965  * partially posted to FW. Driver needs to ensure FW is done with it.
1966  */
1967 static int
1968 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1969                       struct qed_iwarp_fpdu *fpdu,
1970                       struct qed_iwarp_ll2_buff *buf)
1971 {
1972         struct qed_ll2_tx_pkt_info tx_pkt;
1973         u8 ll2_handle;
1974         int rc;
1975
1976         memset(&tx_pkt, 0, sizeof(tx_pkt));
1977         tx_pkt.num_of_bds = 1;
1978         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
1979         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
1980         tx_pkt.first_frag = fpdu->pkt_hdr;
1981         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
1982         buf->piggy_buf = NULL;
1983         tx_pkt.cookie = buf;
1984
1985         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
1986
1987         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
1988         if (rc)
1989                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1990                            "Can't drop packet rc=%d\n", rc);
1991
1992         DP_VERBOSE(p_hwfn,
1993                    QED_MSG_RDMA,
1994                    "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n",
1995                    (unsigned long int)tx_pkt.first_frag,
1996                    tx_pkt.first_frag_len, buf, rc);
1997
1998         return rc;
1999 }
2000
2001 static int
2002 qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu)
2003 {
2004         struct qed_ll2_tx_pkt_info tx_pkt;
2005         u8 ll2_handle;
2006         int rc;
2007
2008         memset(&tx_pkt, 0, sizeof(tx_pkt));
2009         tx_pkt.num_of_bds = 1;
2010         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2011         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
2012
2013         tx_pkt.first_frag = fpdu->pkt_hdr;
2014         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2015         tx_pkt.enable_ip_cksum = true;
2016         tx_pkt.enable_l4_cksum = true;
2017         tx_pkt.calc_ip_len = true;
2018         /* vlan overload with enum iwarp_ll2_tx_queues */
2019         tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE;
2020
2021         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2022
2023         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2024         if (rc)
2025                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2026                            "Can't send right edge rc=%d\n", rc);
2027         DP_VERBOSE(p_hwfn,
2028                    QED_MSG_RDMA,
2029                    "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n",
2030                    tx_pkt.num_of_bds,
2031                    (unsigned long int)tx_pkt.first_frag,
2032                    tx_pkt.first_frag_len, rc);
2033
2034         return rc;
2035 }
2036
2037 static int
2038 qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
2039                     struct qed_iwarp_fpdu *fpdu,
2040                     struct unaligned_opaque_data *curr_pkt,
2041                     struct qed_iwarp_ll2_buff *buf,
2042                     u16 tcp_payload_size, enum qed_iwarp_mpa_pkt_type pkt_type)
2043 {
2044         struct qed_ll2_tx_pkt_info tx_pkt;
2045         u8 ll2_handle;
2046         int rc;
2047
2048         memset(&tx_pkt, 0, sizeof(tx_pkt));
2049
2050         /* An unaligned packet means it's split over two tcp segments. So the
2051          * complete packet requires 3 bds, one for the header, one for the
2052          * part of the fpdu of the first tcp segment, and the last fragment
2053          * will point to the remainder of the fpdu. A packed pdu, requires only
2054          * two bds, one for the header and one for the data.
2055          */
2056         tx_pkt.num_of_bds = (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED) ? 3 : 2;
2057         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2058         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; /* offset in words */
2059
2060         /* Send the mpa_buf only with the last fpdu (in case of packed) */
2061         if (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED ||
2062             tcp_payload_size <= fpdu->fpdu_length)
2063                 tx_pkt.cookie = fpdu->mpa_buf;
2064
2065         tx_pkt.first_frag = fpdu->pkt_hdr;
2066         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2067         tx_pkt.enable_ip_cksum = true;
2068         tx_pkt.enable_l4_cksum = true;
2069         tx_pkt.calc_ip_len = true;
2070         /* vlan overload with enum iwarp_ll2_tx_queues */
2071         tx_pkt.vlan = IWARP_LL2_ALIGNED_TX_QUEUE;
2072
2073         /* special case of unaligned packet and not packed, need to send
2074          * both buffers as cookie to release.
2075          */
2076         if (tcp_payload_size == fpdu->incomplete_bytes)
2077                 fpdu->mpa_buf->piggy_buf = buf;
2078
2079         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2080
2081         /* Set first fragment to header */
2082         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2083         if (rc)
2084                 goto out;
2085
2086         /* Set second fragment to first part of packet */
2087         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, ll2_handle,
2088                                                fpdu->mpa_frag,
2089                                                fpdu->mpa_frag_len);
2090         if (rc)
2091                 goto out;
2092
2093         if (!fpdu->incomplete_bytes)
2094                 goto out;
2095
2096         /* Set third fragment to second part of the packet */
2097         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2098                                                ll2_handle,
2099                                                buf->data_phys_addr +
2100                                                curr_pkt->first_mpa_offset,
2101                                                fpdu->incomplete_bytes);
2102 out:
2103         DP_VERBOSE(p_hwfn,
2104                    QED_MSG_RDMA,
2105                    "MPA_ALIGN: Sent FPDU num_bds=%d first_frag_len=%x, mpa_frag_len=0x%x, incomplete_bytes:0x%x rc=%d\n",
2106                    tx_pkt.num_of_bds,
2107                    tx_pkt.first_frag_len,
2108                    fpdu->mpa_frag_len,
2109                    fpdu->incomplete_bytes, rc);
2110
2111         return rc;
2112 }
2113
2114 static void
2115 qed_iwarp_mpa_get_data(struct qed_hwfn *p_hwfn,
2116                        struct unaligned_opaque_data *curr_pkt,
2117                        u32 opaque_data0, u32 opaque_data1)
2118 {
2119         u64 opaque_data;
2120
2121         opaque_data = HILO_64(opaque_data1, opaque_data0);
2122         *curr_pkt = *((struct unaligned_opaque_data *)&opaque_data);
2123
2124         curr_pkt->first_mpa_offset = curr_pkt->tcp_payload_offset +
2125                                      le16_to_cpu(curr_pkt->first_mpa_offset);
2126         curr_pkt->cid = le32_to_cpu(curr_pkt->cid);
2127 }
2128
2129 /* This function is called when an unaligned or incomplete MPA packet arrives
2130  * driver needs to align the packet, perhaps using previous data and send
2131  * it down to FW once it is aligned.
2132  */
2133 static int
2134 qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
2135                           struct qed_iwarp_ll2_mpa_buf *mpa_buf)
2136 {
2137         struct unaligned_opaque_data *curr_pkt = &mpa_buf->data;
2138         struct qed_iwarp_ll2_buff *buf = mpa_buf->ll2_buf;
2139         enum qed_iwarp_mpa_pkt_type pkt_type;
2140         struct qed_iwarp_fpdu *fpdu;
2141         int rc = -EINVAL;
2142         u8 *mpa_data;
2143
2144         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, curr_pkt->cid & 0xffff);
2145         if (!fpdu) { /* something corrupt with cid, post rx back */
2146                 DP_ERR(p_hwfn, "Invalid cid, drop and post back to rx cid=%x\n",
2147                        curr_pkt->cid);
2148                 goto err;
2149         }
2150
2151         do {
2152                 mpa_data = ((u8 *)(buf->data) + curr_pkt->first_mpa_offset);
2153
2154                 pkt_type = qed_iwarp_mpa_classify(p_hwfn, fpdu,
2155                                                   mpa_buf->tcp_payload_len,
2156                                                   mpa_data);
2157
2158                 switch (pkt_type) {
2159                 case QED_IWARP_MPA_PKT_PARTIAL:
2160                         qed_iwarp_init_fpdu(buf, fpdu,
2161                                             curr_pkt,
2162                                             mpa_buf->tcp_payload_len,
2163                                             mpa_buf->placement_offset);
2164
2165                         if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2166                                 mpa_buf->tcp_payload_len = 0;
2167                                 break;
2168                         }
2169
2170                         rc = qed_iwarp_win_right_edge(p_hwfn, fpdu);
2171
2172                         if (rc) {
2173                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2174                                            "Can't send FPDU:reset rc=%d\n", rc);
2175                                 memset(fpdu, 0, sizeof(*fpdu));
2176                                 break;
2177                         }
2178
2179                         mpa_buf->tcp_payload_len = 0;
2180                         break;
2181                 case QED_IWARP_MPA_PKT_PACKED:
2182                         qed_iwarp_init_fpdu(buf, fpdu,
2183                                             curr_pkt,
2184                                             mpa_buf->tcp_payload_len,
2185                                             mpa_buf->placement_offset);
2186
2187                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2188                                                  mpa_buf->tcp_payload_len,
2189                                                  pkt_type);
2190                         if (rc) {
2191                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2192                                            "Can't send FPDU:reset rc=%d\n", rc);
2193                                 memset(fpdu, 0, sizeof(*fpdu));
2194                                 break;
2195                         }
2196
2197                         mpa_buf->tcp_payload_len -= fpdu->fpdu_length;
2198                         curr_pkt->first_mpa_offset += fpdu->fpdu_length;
2199                         break;
2200                 case QED_IWARP_MPA_PKT_UNALIGNED:
2201                         qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
2202                         if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) {
2203                                 /* special handling of fpdu split over more
2204                                  * than 2 segments
2205                                  */
2206                                 if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2207                                         rc = qed_iwarp_win_right_edge(p_hwfn,
2208                                                                       fpdu);
2209                                         /* packet will be re-processed later */
2210                                         if (rc)
2211                                                 return rc;
2212                                 }
2213
2214                                 rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt,
2215                                                       buf,
2216                                                       mpa_buf->tcp_payload_len);
2217                                 if (rc) /* packet will be re-processed later */
2218                                         return rc;
2219
2220                                 mpa_buf->tcp_payload_len = 0;
2221                                 break;
2222                         }
2223
2224                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2225                                                  mpa_buf->tcp_payload_len,
2226                                                  pkt_type);
2227                         if (rc) {
2228                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2229                                            "Can't send FPDU:delay rc=%d\n", rc);
2230                                 /* don't reset fpdu -> we need it for next
2231                                  * classify
2232                                  */
2233                                 break;
2234                         }
2235
2236                         mpa_buf->tcp_payload_len -= fpdu->incomplete_bytes;
2237                         curr_pkt->first_mpa_offset += fpdu->incomplete_bytes;
2238                         /* The framed PDU was sent - no more incomplete bytes */
2239                         fpdu->incomplete_bytes = 0;
2240                         break;
2241                 }
2242         } while (mpa_buf->tcp_payload_len && !rc);
2243
2244         return rc;
2245
2246 err:
2247         qed_iwarp_ll2_post_rx(p_hwfn,
2248                               buf,
2249                               p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle);
2250         return rc;
2251 }
2252
2253 static void qed_iwarp_process_pending_pkts(struct qed_hwfn *p_hwfn)
2254 {
2255         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2256         struct qed_iwarp_ll2_mpa_buf *mpa_buf = NULL;
2257         int rc;
2258
2259         while (!list_empty(&iwarp_info->mpa_buf_pending_list)) {
2260                 mpa_buf = list_first_entry(&iwarp_info->mpa_buf_pending_list,
2261                                            struct qed_iwarp_ll2_mpa_buf,
2262                                            list_entry);
2263
2264                 rc = qed_iwarp_process_mpa_pkt(p_hwfn, mpa_buf);
2265
2266                 /* busy means break and continue processing later, don't
2267                  * remove the buf from the pending list.
2268                  */
2269                 if (rc == -EBUSY)
2270                         break;
2271
2272                 list_move_tail(&mpa_buf->list_entry,
2273                                &iwarp_info->mpa_buf_list);
2274
2275                 if (rc) {       /* different error, don't continue */
2276                         DP_NOTICE(p_hwfn, "process pkts failed rc=%d\n", rc);
2277                         break;
2278                 }
2279         }
2280 }
2281
2282 static void
2283 qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2284 {
2285         struct qed_iwarp_ll2_mpa_buf *mpa_buf;
2286         struct qed_iwarp_info *iwarp_info;
2287         struct qed_hwfn *p_hwfn = cxt;
2288
2289         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2290         mpa_buf = list_first_entry(&iwarp_info->mpa_buf_list,
2291                                    struct qed_iwarp_ll2_mpa_buf, list_entry);
2292         if (!mpa_buf) {
2293                 DP_ERR(p_hwfn, "No free mpa buf\n");
2294                 goto err;
2295         }
2296
2297         list_del(&mpa_buf->list_entry);
2298         qed_iwarp_mpa_get_data(p_hwfn, &mpa_buf->data,
2299                                data->opaque_data_0, data->opaque_data_1);
2300
2301         DP_VERBOSE(p_hwfn,
2302                    QED_MSG_RDMA,
2303                    "LL2 MPA CompRx payload_len:0x%x\tfirst_mpa_offset:0x%x\ttcp_payload_offset:0x%x\tflags:0x%x\tcid:0x%x\n",
2304                    data->length.packet_length, mpa_buf->data.first_mpa_offset,
2305                    mpa_buf->data.tcp_payload_offset, mpa_buf->data.flags,
2306                    mpa_buf->data.cid);
2307
2308         mpa_buf->ll2_buf = data->cookie;
2309         mpa_buf->tcp_payload_len = data->length.packet_length -
2310                                    mpa_buf->data.first_mpa_offset;
2311         mpa_buf->data.first_mpa_offset += data->u.placement_offset;
2312         mpa_buf->placement_offset = data->u.placement_offset;
2313
2314         list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_pending_list);
2315
2316         qed_iwarp_process_pending_pkts(p_hwfn);
2317         return;
2318 err:
2319         qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
2320                               iwarp_info->ll2_mpa_handle);
2321 }
2322
2323 static void
2324 qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2325 {
2326         struct qed_iwarp_ll2_buff *buf = data->cookie;
2327         struct qed_iwarp_listener *listener;
2328         struct qed_ll2_tx_pkt_info tx_pkt;
2329         struct qed_iwarp_cm_info cm_info;
2330         struct qed_hwfn *p_hwfn = cxt;
2331         u8 remote_mac_addr[ETH_ALEN];
2332         u8 local_mac_addr[ETH_ALEN];
2333         struct qed_iwarp_ep *ep;
2334         int tcp_start_offset;
2335         u8 ll2_syn_handle;
2336         int payload_len;
2337         u32 hdr_size;
2338         int rc;
2339
2340         memset(&cm_info, 0, sizeof(cm_info));
2341         ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2342
2343         /* Check if packet was received with errors... */
2344         if (data->err_flags) {
2345                 DP_NOTICE(p_hwfn, "Error received on SYN packet: 0x%x\n",
2346                           data->err_flags);
2347                 goto err;
2348         }
2349
2350         if (GET_FIELD(data->parse_flags,
2351                       PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
2352             GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
2353                 DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
2354                 goto err;
2355         }
2356
2357         rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
2358                                     data->u.placement_offset, remote_mac_addr,
2359                                     local_mac_addr, &payload_len,
2360                                     &tcp_start_offset);
2361         if (rc)
2362                 goto err;
2363
2364         /* Check if there is a listener for this 4-tuple+vlan */
2365         listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
2366         if (!listener) {
2367                 DP_VERBOSE(p_hwfn,
2368                            QED_MSG_RDMA,
2369                            "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
2370                            data->parse_flags, data->length.packet_length);
2371
2372                 memset(&tx_pkt, 0, sizeof(tx_pkt));
2373                 tx_pkt.num_of_bds = 1;
2374                 tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
2375                 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2376                 tx_pkt.first_frag = buf->data_phys_addr +
2377                                     data->u.placement_offset;
2378                 tx_pkt.first_frag_len = data->length.packet_length;
2379                 tx_pkt.cookie = buf;
2380
2381                 rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
2382                                                &tx_pkt, true);
2383
2384                 if (rc) {
2385                         DP_NOTICE(p_hwfn,
2386                                   "Can't post SYN back to chip rc=%d\n", rc);
2387                         goto err;
2388                 }
2389                 return;
2390         }
2391
2392         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
2393         /* There may be an open ep on this connection if this is a syn
2394          * retrasnmit... need to make sure there isn't...
2395          */
2396         if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
2397                 goto err;
2398
2399         ep = qed_iwarp_get_free_ep(p_hwfn);
2400         if (!ep)
2401                 goto err;
2402
2403         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2404         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
2405         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2406
2407         ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
2408         ether_addr_copy(ep->local_mac_addr, local_mac_addr);
2409
2410         memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));
2411
2412         hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60);
2413         ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
2414         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
2415
2416         ep->event_cb = listener->event_cb;
2417         ep->cb_context = listener->cb_context;
2418         ep->connect_mode = TCP_CONNECT_PASSIVE;
2419
2420         ep->syn = buf;
2421         ep->syn_ip_payload_length = (u16)payload_len;
2422         ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
2423                            tcp_start_offset;
2424
2425         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
2426         if (rc) {
2427                 qed_iwarp_return_ep(p_hwfn, ep);
2428                 goto err;
2429         }
2430
2431         return;
2432 err:
2433         qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
2434 }
2435
2436 static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
2437                                      void *cookie, dma_addr_t rx_buf_addr,
2438                                      bool b_last_packet)
2439 {
2440         struct qed_iwarp_ll2_buff *buffer = cookie;
2441         struct qed_hwfn *p_hwfn = cxt;
2442
2443         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2444                           buffer->data, buffer->data_phys_addr);
2445         kfree(buffer);
2446 }
2447
2448 static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
2449                                       void *cookie, dma_addr_t first_frag_addr,
2450                                       bool b_last_fragment, bool b_last_packet)
2451 {
2452         struct qed_iwarp_ll2_buff *buffer = cookie;
2453         struct qed_iwarp_ll2_buff *piggy;
2454         struct qed_hwfn *p_hwfn = cxt;
2455
2456         if (!buffer)            /* can happen in packed mpa unaligned... */
2457                 return;
2458
2459         /* this was originally an rx packet, post it back */
2460         piggy = buffer->piggy_buf;
2461         if (piggy) {
2462                 buffer->piggy_buf = NULL;
2463                 qed_iwarp_ll2_post_rx(p_hwfn, piggy, connection_handle);
2464         }
2465
2466         qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);
2467
2468         if (connection_handle == p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle)
2469                 qed_iwarp_process_pending_pkts(p_hwfn);
2470
2471         return;
2472 }
2473
2474 static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
2475                                      void *cookie, dma_addr_t first_frag_addr,
2476                                      bool b_last_fragment, bool b_last_packet)
2477 {
2478         struct qed_iwarp_ll2_buff *buffer = cookie;
2479         struct qed_hwfn *p_hwfn = cxt;
2480
2481         if (!buffer)
2482                 return;
2483
2484         if (buffer->piggy_buf) {
2485                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2486                                   buffer->piggy_buf->buff_size,
2487                                   buffer->piggy_buf->data,
2488                                   buffer->piggy_buf->data_phys_addr);
2489
2490                 kfree(buffer->piggy_buf);
2491         }
2492
2493         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2494                           buffer->data, buffer->data_phys_addr);
2495
2496         kfree(buffer);
2497 }
2498
2499 /* The only slowpath for iwarp ll2 is unalign flush. When this completion
2500  * is received, need to reset the FPDU.
2501  */
2502 static void
2503 qed_iwarp_ll2_slowpath(void *cxt,
2504                        u8 connection_handle,
2505                        u32 opaque_data_0, u32 opaque_data_1)
2506 {
2507         struct unaligned_opaque_data unalign_data;
2508         struct qed_hwfn *p_hwfn = cxt;
2509         struct qed_iwarp_fpdu *fpdu;
2510
2511         qed_iwarp_mpa_get_data(p_hwfn, &unalign_data,
2512                                opaque_data_0, opaque_data_1);
2513
2514         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "(0x%x) Flush fpdu\n",
2515                    unalign_data.cid);
2516
2517         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)unalign_data.cid);
2518         if (fpdu)
2519                 memset(fpdu, 0, sizeof(*fpdu));
2520 }
2521
2522 static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2523 {
2524         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2525         int rc = 0;
2526
2527         if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
2528                 rc = qed_ll2_terminate_connection(p_hwfn,
2529                                                   iwarp_info->ll2_syn_handle);
2530                 if (rc)
2531                         DP_INFO(p_hwfn, "Failed to terminate syn connection\n");
2532
2533                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2534                 iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2535         }
2536
2537         if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
2538                 rc = qed_ll2_terminate_connection(p_hwfn,
2539                                                   iwarp_info->ll2_ooo_handle);
2540                 if (rc)
2541                         DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");
2542
2543                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2544                 iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2545         }
2546
2547         if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
2548                 rc = qed_ll2_terminate_connection(p_hwfn,
2549                                                   iwarp_info->ll2_mpa_handle);
2550                 if (rc)
2551                         DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");
2552
2553                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2554                 iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2555         }
2556
2557         qed_llh_remove_mac_filter(p_hwfn,
2558                                   p_ptt, p_hwfn->p_rdma_info->iwarp.mac_addr);
2559         return rc;
2560 }
2561
2562 static int
2563 qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
2564                             int num_rx_bufs, int buff_size, u8 ll2_handle)
2565 {
2566         struct qed_iwarp_ll2_buff *buffer;
2567         int rc = 0;
2568         int i;
2569
2570         for (i = 0; i < num_rx_bufs; i++) {
2571                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2572                 if (!buffer) {
2573                         rc = -ENOMEM;
2574                         break;
2575                 }
2576
2577                 buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
2578                                                   buff_size,
2579                                                   &buffer->data_phys_addr,
2580                                                   GFP_KERNEL);
2581                 if (!buffer->data) {
2582                         kfree(buffer);
2583                         rc = -ENOMEM;
2584                         break;
2585                 }
2586
2587                 buffer->buff_size = buff_size;
2588                 rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
2589                 if (rc)
2590                         /* buffers will be deallocated by qed_ll2 */
2591                         break;
2592         }
2593         return rc;
2594 }
2595
2596 #define QED_IWARP_MAX_BUF_SIZE(mtu)                                  \
2597         ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
2598                 ETH_CACHE_LINE_SIZE)
2599
2600 static int
2601 qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
2602                     struct qed_rdma_start_in_params *params,
2603                     struct qed_ptt *p_ptt)
2604 {
2605         struct qed_iwarp_info *iwarp_info;
2606         struct qed_ll2_acquire_data data;
2607         struct qed_ll2_cbs cbs;
2608         u32 mpa_buff_size;
2609         u16 n_ooo_bufs;
2610         int rc = 0;
2611         int i;
2612
2613         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2614         iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2615         iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2616         iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2617
2618         iwarp_info->max_mtu = params->max_mtu;
2619
2620         ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);
2621
2622         rc = qed_llh_add_mac_filter(p_hwfn, p_ptt, params->mac_addr);
2623         if (rc)
2624                 return rc;
2625
2626         /* Start SYN connection */
2627         cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
2628         cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
2629         cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
2630         cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
2631         cbs.cookie = p_hwfn;
2632
2633         memset(&data, 0, sizeof(data));
2634         data.input.conn_type = QED_LL2_TYPE_IWARP;
2635         data.input.mtu = QED_IWARP_MAX_SYN_PKT_SIZE;
2636         data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
2637         data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
2638         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2639         data.input.tx_tc = PKT_LB_TC;
2640         data.input.tx_dest = QED_LL2_TX_DEST_LB;
2641         data.p_connection_handle = &iwarp_info->ll2_syn_handle;
2642         data.cbs = &cbs;
2643
2644         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2645         if (rc) {
2646                 DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
2647                 qed_llh_remove_mac_filter(p_hwfn, p_ptt, params->mac_addr);
2648                 return rc;
2649         }
2650
2651         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2652         if (rc) {
2653                 DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
2654                 goto err;
2655         }
2656
2657         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2658                                          QED_IWARP_LL2_SYN_RX_SIZE,
2659                                          QED_IWARP_MAX_SYN_PKT_SIZE,
2660                                          iwarp_info->ll2_syn_handle);
2661         if (rc)
2662                 goto err;
2663
2664         /* Start OOO connection */
2665         data.input.conn_type = QED_LL2_TYPE_OOO;
2666         data.input.mtu = params->max_mtu;
2667
2668         n_ooo_bufs = (QED_IWARP_MAX_OOO * QED_IWARP_RCV_WND_SIZE_DEF) /
2669                      iwarp_info->max_mtu;
2670         n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);
2671
2672         data.input.rx_num_desc = n_ooo_bufs;
2673         data.input.rx_num_ooo_buffers = n_ooo_bufs;
2674
2675         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2676         data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
2677         data.p_connection_handle = &iwarp_info->ll2_ooo_handle;
2678
2679         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2680         if (rc)
2681                 goto err;
2682
2683         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2684         if (rc)
2685                 goto err;
2686
2687         /* Start Unaligned MPA connection */
2688         cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
2689         cbs.slowpath_cb = qed_iwarp_ll2_slowpath;
2690
2691         memset(&data, 0, sizeof(data));
2692         data.input.conn_type = QED_LL2_TYPE_IWARP;
2693         data.input.mtu = params->max_mtu;
2694         /* FW requires that once a packet arrives OOO, it must have at
2695          * least 2 rx buffers available on the unaligned connection
2696          * for handling the case that it is a partial fpdu.
2697          */
2698         data.input.rx_num_desc = n_ooo_bufs * 2;
2699         data.input.tx_num_desc = data.input.rx_num_desc;
2700         data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
2701         data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
2702         data.input.secondary_queue = true;
2703         data.cbs = &cbs;
2704
2705         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2706         if (rc)
2707                 goto err;
2708
2709         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2710         if (rc)
2711                 goto err;
2712
2713         mpa_buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
2714         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2715                                          data.input.rx_num_desc,
2716                                          mpa_buff_size,
2717                                          iwarp_info->ll2_mpa_handle);
2718         if (rc)
2719                 goto err;
2720
2721         iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
2722                                             sizeof(*iwarp_info->partial_fpdus),
2723                                             GFP_KERNEL);
2724         if (!iwarp_info->partial_fpdus)
2725                 goto err;
2726
2727         iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps;
2728
2729         iwarp_info->mpa_intermediate_buf = kzalloc(mpa_buff_size, GFP_KERNEL);
2730         if (!iwarp_info->mpa_intermediate_buf)
2731                 goto err;
2732
2733         /* The mpa_bufs array serves for pending RX packets received on the
2734          * mpa ll2 that don't have place on the tx ring and require later
2735          * processing. We can't fail on allocation of such a struct therefore
2736          * we allocate enough to take care of all rx packets
2737          */
2738         iwarp_info->mpa_bufs = kcalloc(data.input.rx_num_desc,
2739                                        sizeof(*iwarp_info->mpa_bufs),
2740                                        GFP_KERNEL);
2741         if (!iwarp_info->mpa_bufs)
2742                 goto err;
2743
2744         INIT_LIST_HEAD(&iwarp_info->mpa_buf_pending_list);
2745         INIT_LIST_HEAD(&iwarp_info->mpa_buf_list);
2746         for (i = 0; i < data.input.rx_num_desc; i++)
2747                 list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
2748                               &iwarp_info->mpa_buf_list);
2749         return rc;
2750 err:
2751         qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2752
2753         return rc;
2754 }
2755
2756 int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
2757                     struct qed_rdma_start_in_params *params)
2758 {
2759         struct qed_iwarp_info *iwarp_info;
2760         u32 rcv_wnd_size;
2761
2762         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2763
2764         iwarp_info->tcp_flags = QED_IWARP_TS_EN;
2765         rcv_wnd_size = QED_IWARP_RCV_WND_SIZE_DEF;
2766
2767         /* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
2768         iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
2769             ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
2770         iwarp_info->rcv_wnd_size = rcv_wnd_size >> iwarp_info->rcv_wnd_scale;
2771         iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
2772         iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
2773
2774         iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
2775
2776         iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
2777                                 MPA_RTR_TYPE_ZERO_WRITE |
2778                                 MPA_RTR_TYPE_ZERO_READ;
2779
2780         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
2781         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
2782         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);
2783
2784         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
2785                                   qed_iwarp_async_event);
2786         qed_ooo_setup(p_hwfn);
2787
2788         return qed_iwarp_ll2_start(p_hwfn, params, p_ptt);
2789 }
2790
2791 int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2792 {
2793         int rc;
2794
2795         qed_iwarp_free_prealloc_ep(p_hwfn);
2796         rc = qed_iwarp_wait_for_all_cids(p_hwfn);
2797         if (rc)
2798                 return rc;
2799
2800         qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_IWARP);
2801
2802         return qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2803 }
2804
2805 static void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
2806                                   struct qed_iwarp_ep *ep,
2807                                   u8 fw_return_code)
2808 {
2809         struct qed_iwarp_cm_event_params params;
2810
2811         qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
2812
2813         params.event = QED_IWARP_EVENT_CLOSE;
2814         params.ep_context = ep;
2815         params.cm_info = &ep->cm_info;
2816         params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
2817                          0 : -ECONNRESET;
2818
2819         ep->state = QED_IWARP_EP_CLOSED;
2820         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2821         list_del(&ep->list_entry);
2822         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2823
2824         ep->event_cb(ep->cb_context, &params);
2825 }
2826
2827 static void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
2828                                          struct qed_iwarp_ep *ep,
2829                                          int fw_ret_code)
2830 {
2831         struct qed_iwarp_cm_event_params params;
2832         bool event_cb = false;
2833
2834         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
2835                    ep->cid, fw_ret_code);
2836
2837         switch (fw_ret_code) {
2838         case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
2839                 params.status = 0;
2840                 params.event = QED_IWARP_EVENT_DISCONNECT;
2841                 event_cb = true;
2842                 break;
2843         case IWARP_EXCEPTION_DETECTED_LLP_RESET:
2844                 params.status = -ECONNRESET;
2845                 params.event = QED_IWARP_EVENT_DISCONNECT;
2846                 event_cb = true;
2847                 break;
2848         case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
2849                 params.event = QED_IWARP_EVENT_RQ_EMPTY;
2850                 event_cb = true;
2851                 break;
2852         case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
2853                 params.event = QED_IWARP_EVENT_IRQ_FULL;
2854                 event_cb = true;
2855                 break;
2856         case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
2857                 params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
2858                 event_cb = true;
2859                 break;
2860         case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
2861                 params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
2862                 event_cb = true;
2863                 break;
2864         case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
2865                 params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
2866                 event_cb = true;
2867                 break;
2868         case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
2869                 params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
2870                 event_cb = true;
2871                 break;
2872         case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
2873                 params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
2874                 event_cb = true;
2875                 break;
2876         case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
2877                 params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
2878                 event_cb = true;
2879                 break;
2880         case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
2881                 params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
2882                 event_cb = true;
2883                 break;
2884         default:
2885                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2886                            "Unhandled exception received...fw_ret_code=%d\n",
2887                            fw_ret_code);
2888                 break;
2889         }
2890
2891         if (event_cb) {
2892                 params.ep_context = ep;
2893                 params.cm_info = &ep->cm_info;
2894                 ep->event_cb(ep->cb_context, &params);
2895         }
2896 }
2897
2898 static void
2899 qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
2900                                    struct qed_iwarp_ep *ep, u8 fw_return_code)
2901 {
2902         struct qed_iwarp_cm_event_params params;
2903
2904         memset(&params, 0, sizeof(params));
2905         params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
2906         params.ep_context = ep;
2907         params.cm_info = &ep->cm_info;
2908         ep->state = QED_IWARP_EP_CLOSED;
2909
2910         switch (fw_return_code) {
2911         case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
2912                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2913                            "%s(0x%x) TCP connect got invalid packet\n",
2914                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2915                 params.status = -ECONNRESET;
2916                 break;
2917         case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
2918                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2919                            "%s(0x%x) TCP Connection Reset\n",
2920                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2921                 params.status = -ECONNRESET;
2922                 break;
2923         case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
2924                 DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
2925                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2926                 params.status = -EBUSY;
2927                 break;
2928         case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
2929                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
2930                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2931                 params.status = -ECONNREFUSED;
2932                 break;
2933         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
2934                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
2935                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2936                 params.status = -ECONNRESET;
2937                 break;
2938         default:
2939                 DP_ERR(p_hwfn,
2940                        "%s(0x%x) Unexpected return code tcp connect: %d\n",
2941                        QED_IWARP_CONNECT_MODE_STRING(ep),
2942                        ep->tcp_cid, fw_return_code);
2943                 params.status = -ECONNRESET;
2944                 break;
2945         }
2946
2947         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2948                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
2949                 qed_iwarp_return_ep(p_hwfn, ep);
2950         } else {
2951                 ep->event_cb(ep->cb_context, &params);
2952                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2953                 list_del(&ep->list_entry);
2954                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2955         }
2956 }
2957
2958 static void
2959 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
2960                            struct qed_iwarp_ep *ep, u8 fw_return_code)
2961 {
2962         u8 ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2963
2964         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2965                 /* Done with the SYN packet, post back to ll2 rx */
2966                 qed_iwarp_ll2_post_rx(p_hwfn, ep->syn, ll2_syn_handle);
2967
2968                 ep->syn = NULL;
2969
2970                 /* If connect failed - upper layer doesn't know about it */
2971                 if (fw_return_code == RDMA_RETURN_OK)
2972                         qed_iwarp_mpa_received(p_hwfn, ep);
2973                 else
2974                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2975                                                            fw_return_code);
2976         } else {
2977                 if (fw_return_code == RDMA_RETURN_OK)
2978                         qed_iwarp_mpa_offload(p_hwfn, ep);
2979                 else
2980                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2981                                                            fw_return_code);
2982         }
2983 }
2984
2985 static inline bool
2986 qed_iwarp_check_ep_ok(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
2987 {
2988         if (!ep || (ep->sig != QED_EP_SIG)) {
2989                 DP_ERR(p_hwfn, "ERROR ON ASYNC ep=%p\n", ep);
2990                 return false;
2991         }
2992
2993         return true;
2994 }
2995
2996 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
2997                                  u8 fw_event_code, u16 echo,
2998                                  union event_ring_data *data,
2999                                  u8 fw_return_code)
3000 {
3001         struct qed_rdma_events events = p_hwfn->p_rdma_info->events;
3002         struct regpair *fw_handle = &data->rdma_data.async_handle;
3003         struct qed_iwarp_ep *ep = NULL;
3004         u16 srq_offset;
3005         u16 srq_id;
3006         u16 cid;
3007
3008         ep = (struct qed_iwarp_ep *)(uintptr_t)HILO_64(fw_handle->hi,
3009                                                        fw_handle->lo);
3010
3011         switch (fw_event_code) {
3012         case IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE:
3013                 /* Async completion after TCP 3-way handshake */
3014                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3015                         return -EINVAL;
3016                 DP_VERBOSE(p_hwfn,
3017                            QED_MSG_RDMA,
3018                            "EP(0x%x) IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE fw_ret_code=%d\n",
3019                            ep->tcp_cid, fw_return_code);
3020                 qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
3021                 break;
3022         case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
3023                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3024                         return -EINVAL;
3025                 DP_VERBOSE(p_hwfn,
3026                            QED_MSG_RDMA,
3027                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
3028                            ep->cid, fw_return_code);
3029                 qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
3030                 break;
3031         case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
3032                 /* Async completion for Close Connection ramrod */
3033                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3034                         return -EINVAL;
3035                 DP_VERBOSE(p_hwfn,
3036                            QED_MSG_RDMA,
3037                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
3038                            ep->cid, fw_return_code);
3039                 qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
3040                 break;
3041         case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
3042                 /* Async event for active side only */
3043                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3044                         return -EINVAL;
3045                 DP_VERBOSE(p_hwfn,
3046                            QED_MSG_RDMA,
3047                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_MPA_REPLY_ARRIVED fw_ret_code=%d\n",
3048                            ep->cid, fw_return_code);
3049                 qed_iwarp_mpa_reply_arrived(p_hwfn, ep);
3050                 break;
3051         case IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE:
3052                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3053                         return -EINVAL;
3054                 DP_VERBOSE(p_hwfn,
3055                            QED_MSG_RDMA,
3056                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE fw_ret_code=%d\n",
3057                            ep->cid, fw_return_code);
3058                 qed_iwarp_mpa_complete(p_hwfn, ep, fw_return_code);
3059                 break;
3060         case IWARP_EVENT_TYPE_ASYNC_CID_CLEANED:
3061                 cid = (u16)le32_to_cpu(fw_handle->lo);
3062                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
3063                            "(0x%x)IWARP_EVENT_TYPE_ASYNC_CID_CLEANED\n", cid);
3064                 qed_iwarp_cid_cleaned(p_hwfn, cid);
3065
3066                 break;
3067         case IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY:
3068                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY\n");
3069                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3070                 /* FW assigns value that is no greater than u16 */
3071                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3072                 events.affiliated_event(events.context,
3073                                         QED_IWARP_EVENT_SRQ_EMPTY,
3074                                         &srq_id);
3075                 break;
3076         case IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT:
3077                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT\n");
3078                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3079                 /* FW assigns value that is no greater than u16 */
3080                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3081                 events.affiliated_event(events.context,
3082                                         QED_IWARP_EVENT_SRQ_LIMIT,
3083                                         &srq_id);
3084                 break;
3085         case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
3086                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
3087
3088                 p_hwfn->p_rdma_info->events.affiliated_event(
3089                         p_hwfn->p_rdma_info->events.context,
3090                         QED_IWARP_EVENT_CQ_OVERFLOW,
3091                         (void *)fw_handle);
3092                 break;
3093         default:
3094                 DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
3095                        fw_event_code);
3096                 return -EINVAL;
3097         }
3098         return 0;
3099 }
3100
3101 int
3102 qed_iwarp_create_listen(void *rdma_cxt,
3103                         struct qed_iwarp_listen_in *iparams,
3104                         struct qed_iwarp_listen_out *oparams)
3105 {
3106         struct qed_hwfn *p_hwfn = rdma_cxt;
3107         struct qed_iwarp_listener *listener;
3108
3109         listener = kzalloc(sizeof(*listener), GFP_KERNEL);
3110         if (!listener)
3111                 return -ENOMEM;
3112
3113         listener->ip_version = iparams->ip_version;
3114         memcpy(listener->ip_addr, iparams->ip_addr, sizeof(listener->ip_addr));
3115         listener->port = iparams->port;
3116         listener->vlan = iparams->vlan;
3117
3118         listener->event_cb = iparams->event_cb;
3119         listener->cb_context = iparams->cb_context;
3120         listener->max_backlog = iparams->max_backlog;
3121         oparams->handle = listener;
3122
3123         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3124         list_add_tail(&listener->list_entry,
3125                       &p_hwfn->p_rdma_info->iwarp.listen_list);
3126         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3127
3128         DP_VERBOSE(p_hwfn,
3129                    QED_MSG_RDMA,
3130                    "callback=%p handle=%p ip=%x:%x:%x:%x port=0x%x vlan=0x%x\n",
3131                    listener->event_cb,
3132                    listener,
3133                    listener->ip_addr[0],
3134                    listener->ip_addr[1],
3135                    listener->ip_addr[2],
3136                    listener->ip_addr[3], listener->port, listener->vlan);
3137
3138         return 0;
3139 }
3140
3141 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle)
3142 {
3143         struct qed_iwarp_listener *listener = handle;
3144         struct qed_hwfn *p_hwfn = rdma_cxt;
3145
3146         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "handle=%p\n", handle);
3147
3148         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3149         list_del(&listener->list_entry);
3150         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3151
3152         kfree(listener);
3153
3154         return 0;
3155 }
3156
3157 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams)
3158 {
3159         struct qed_hwfn *p_hwfn = rdma_cxt;
3160         struct qed_sp_init_data init_data;
3161         struct qed_spq_entry *p_ent;
3162         struct qed_iwarp_ep *ep;
3163         struct qed_rdma_qp *qp;
3164         int rc;
3165
3166         ep = iparams->ep_context;
3167         if (!ep) {
3168                 DP_ERR(p_hwfn, "Ep Context receive in send_rtr is NULL\n");
3169                 return -EINVAL;
3170         }
3171
3172         qp = ep->qp;
3173
3174         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
3175                    qp->icid, ep->tcp_cid);
3176
3177         memset(&init_data, 0, sizeof(init_data));
3178         init_data.cid = qp->icid;
3179         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
3180         init_data.comp_mode = QED_SPQ_MODE_CB;
3181
3182         rc = qed_sp_init_request(p_hwfn, &p_ent,
3183                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD_SEND_RTR,
3184                                  PROTOCOLID_IWARP, &init_data);
3185
3186         if (rc)
3187                 return rc;
3188
3189         rc = qed_spq_post(p_hwfn, p_ent, NULL);
3190
3191         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = 0x%x\n", rc);
3192
3193         return rc;
3194 }
3195
3196 void
3197 qed_iwarp_query_qp(struct qed_rdma_qp *qp,
3198                    struct qed_rdma_query_qp_out_params *out_params)
3199 {
3200         out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
3201 }