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_del(&ep->list_entry);
 939         list_add_tail(&ep->list_entry,
 940                       &p_hwfn->p_rdma_info->iwarp.ep_free_list);
 941
 942         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 943 }
 944
 945 static void
 946 qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 947 {
 948         struct mpa_v2_hdr *mpa_v2_params;
 949         union async_output *async_data;
 950         u16 mpa_ird, mpa_ord;
 951         u8 mpa_data_size = 0;
 952
 953         if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
 954                 mpa_v2_params =
 955                         (struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
 956                 mpa_data_size = sizeof(*mpa_v2_params);
 957                 mpa_ird = ntohs(mpa_v2_params->ird);
 958                 mpa_ord = ntohs(mpa_v2_params->ord);
 959
 960                 ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
 961                 ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
 962         }
 963         async_data = &ep->ep_buffer_virt->async_output;
 964
 965         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;
 966         ep->cm_info.private_data_len = async_data->mpa_response.ulp_data_len -
 967                                        mpa_data_size;
 968 }
 969
 970 static void
 971 qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 972 {
 973         struct qed_iwarp_cm_event_params params;
 974
 975         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 976                 DP_NOTICE(p_hwfn,
 977                           "MPA reply event not expected on passive side!\n");
 978                 return;
 979         }
 980
 981         params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;
 982
 983         qed_iwarp_parse_private_data(p_hwfn, ep);
 984
 985         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 986                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
 987                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
 988
 989         params.cm_info = &ep->cm_info;
 990         params.ep_context = ep;
 991         params.status = 0;
 992
 993         ep->mpa_reply_processed = true;
 994
 995         ep->event_cb(ep->cb_context, &params);
 996 }
 997
 998 #define QED_IWARP_CONNECT_MODE_STRING(ep) \
 999         ((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"
1000
1001 /* Called as a result of the event:
1002  * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
1003  */
1004 static void
1005 qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
1006                        struct qed_iwarp_ep *ep, u8 fw_return_code)
1007 {
1008         struct qed_iwarp_cm_event_params params;
1009
1010         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
1011                 params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
1012         else
1013                 params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;
1014
1015         if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
1016                 qed_iwarp_parse_private_data(p_hwfn, ep);
1017
1018         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1019                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
1020                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
1021
1022         params.cm_info = &ep->cm_info;
1023
1024         params.ep_context = ep;
1025
1026         ep->state = QED_IWARP_EP_CLOSED;
1027
1028         switch (fw_return_code) {
1029         case RDMA_RETURN_OK:
1030                 ep->qp->max_rd_atomic_req = ep->cm_info.ord;
1031                 ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
1032                 qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
1033                 ep->state = QED_IWARP_EP_ESTABLISHED;
1034                 params.status = 0;
1035                 break;
1036         case IWARP_CONN_ERROR_MPA_TIMEOUT:
1037                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
1038                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1039                 params.status = -EBUSY;
1040                 break;
1041         case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
1042                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
1043                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1044                 params.status = -ECONNREFUSED;
1045                 break;
1046         case IWARP_CONN_ERROR_MPA_RST:
1047                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
1048                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
1049                           ep->tcp_cid);
1050                 params.status = -ECONNRESET;
1051                 break;
1052         case IWARP_CONN_ERROR_MPA_FIN:
1053                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
1054                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1055                 params.status = -ECONNREFUSED;
1056                 break;
1057         case IWARP_CONN_ERROR_MPA_INSUF_IRD:
1058                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
1059                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1060                 params.status = -ECONNREFUSED;
1061                 break;
1062         case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
1063                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
1064                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1065                 params.status = -ECONNREFUSED;
1066                 break;
1067         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
1068                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
1069                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1070                 params.status = -ECONNREFUSED;
1071                 break;
1072         case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
1073                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
1074                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1075                 params.status = -ECONNREFUSED;
1076                 break;
1077         case IWARP_CONN_ERROR_MPA_TERMINATE:
1078                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
1079                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1080                 params.status = -ECONNREFUSED;
1081                 break;
1082         default:
1083                 params.status = -ECONNRESET;
1084                 break;
1085         }
1086
1087         ep->event_cb(ep->cb_context, &params);
1088
1089         /* on passive side, if there is no associated QP (REJECT) we need to
1090          * return the ep to the pool, (in the regular case we add an element
1091          * in accept instead of this one.
1092          * In both cases we need to remove it from the ep_list.
1093          */
1094         if (fw_return_code != RDMA_RETURN_OK) {
1095                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1096                 if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
1097                     (!ep->qp)) {        /* Rejected */
1098                         qed_iwarp_return_ep(p_hwfn, ep);
1099                 } else {
1100                         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1101                         list_del(&ep->list_entry);
1102                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1103                 }
1104         }
1105 }
1106
1107 static void
1108 qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
1109                              struct qed_iwarp_ep *ep, u8 *mpa_data_size)
1110 {
1111         struct mpa_v2_hdr *mpa_v2_params;
1112         u16 mpa_ird, mpa_ord;
1113
1114         *mpa_data_size = 0;
1115         if (MPA_REV2(ep->mpa_rev)) {
1116                 mpa_v2_params =
1117                     (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
1118                 *mpa_data_size = sizeof(*mpa_v2_params);
1119
1120                 mpa_ird = (u16)ep->cm_info.ird;
1121                 mpa_ord = (u16)ep->cm_info.ord;
1122
1123                 if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
1124                         mpa_ird |= MPA_V2_PEER2PEER_MODEL;
1125
1126                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
1127                                 mpa_ird |= MPA_V2_SEND_RTR;
1128
1129                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
1130                                 mpa_ord |= MPA_V2_WRITE_RTR;
1131
1132                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
1133                                 mpa_ord |= MPA_V2_READ_RTR;
1134                 }
1135
1136                 mpa_v2_params->ird = htons(mpa_ird);
1137                 mpa_v2_params->ord = htons(mpa_ord);
1138
1139                 DP_VERBOSE(p_hwfn,
1140                            QED_MSG_RDMA,
1141                            "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
1142                            mpa_v2_params->ird,
1143                            mpa_v2_params->ord,
1144                            *((u32 *)mpa_v2_params),
1145                            mpa_ord & MPA_V2_IRD_ORD_MASK,
1146                            mpa_ird & MPA_V2_IRD_ORD_MASK,
1147                            !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
1148                            !!(mpa_ird & MPA_V2_SEND_RTR),
1149                            !!(mpa_ord & MPA_V2_WRITE_RTR),
1150                            !!(mpa_ord & MPA_V2_READ_RTR));
1151         }
1152 }
1153
1154 int qed_iwarp_connect(void *rdma_cxt,
1155                       struct qed_iwarp_connect_in *iparams,
1156                       struct qed_iwarp_connect_out *oparams)
1157 {
1158         struct qed_hwfn *p_hwfn = rdma_cxt;
1159         struct qed_iwarp_info *iwarp_info;
1160         struct qed_iwarp_ep *ep;
1161         u8 mpa_data_size = 0;
1162         u32 cid;
1163         int rc;
1164
1165         if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
1166             (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
1167                 DP_NOTICE(p_hwfn,
1168                           "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1169                           iparams->qp->icid, iparams->cm_info.ord,
1170                           iparams->cm_info.ird);
1171
1172                 return -EINVAL;
1173         }
1174
1175         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1176
1177         /* Allocate ep object */
1178         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1179         if (rc)
1180                 return rc;
1181
1182         rc = qed_iwarp_create_ep(p_hwfn, &ep);
1183         if (rc)
1184                 goto err;
1185
1186         ep->tcp_cid = cid;
1187
1188         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1189         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1190         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1191
1192         ep->qp = iparams->qp;
1193         ep->qp->ep = ep;
1194         ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
1195         ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
1196         memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));
1197
1198         ep->cm_info.ord = iparams->cm_info.ord;
1199         ep->cm_info.ird = iparams->cm_info.ird;
1200
1201         ep->rtr_type = iwarp_info->rtr_type;
1202         if (!iwarp_info->peer2peer)
1203                 ep->rtr_type = MPA_RTR_TYPE_NONE;
1204
1205         if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
1206                 ep->cm_info.ord = 1;
1207
1208         ep->mpa_rev = iwarp_info->mpa_rev;
1209
1210         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1211
1212         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1213         ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
1214                                        mpa_data_size;
1215
1216         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1217                iparams->cm_info.private_data,
1218                iparams->cm_info.private_data_len);
1219
1220         ep->mss = iparams->mss;
1221         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1222
1223         ep->event_cb = iparams->event_cb;
1224         ep->cb_context = iparams->cb_context;
1225         ep->connect_mode = TCP_CONNECT_ACTIVE;
1226
1227         oparams->ep_context = ep;
1228
1229         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1230
1231         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
1232                    iparams->qp->icid, ep->tcp_cid, rc);
1233
1234         if (rc) {
1235                 qed_iwarp_destroy_ep(p_hwfn, ep, true);
1236                 goto err;
1237         }
1238
1239         return rc;
1240 err:
1241         qed_iwarp_cid_cleaned(p_hwfn, cid);
1242
1243         return rc;
1244 }
1245
1246 static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
1247 {
1248         struct qed_iwarp_ep *ep = NULL;
1249         int rc;
1250
1251         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1252
1253         if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1254                 DP_ERR(p_hwfn, "Ep list is empty\n");
1255                 goto out;
1256         }
1257
1258         ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1259                               struct qed_iwarp_ep, list_entry);
1260
1261         /* in some cases we could have failed allocating a tcp cid when added
1262          * from accept / failure... retry now..this is not the common case.
1263          */
1264         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
1265                 rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
1266
1267                 /* if we fail we could look for another entry with a valid
1268                  * tcp_cid, but since we don't expect to reach this anyway
1269                  * it's not worth the handling
1270                  */
1271                 if (rc) {
1272                         ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1273                         ep = NULL;
1274                         goto out;
1275                 }
1276         }
1277
1278         list_del(&ep->list_entry);
1279
1280 out:
1281         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1282         return ep;
1283 }
1284
1285 #define QED_IWARP_MAX_CID_CLEAN_TIME  100
1286 #define QED_IWARP_MAX_NO_PROGRESS_CNT 5
1287
1288 /* This function waits for all the bits of a bmap to be cleared, as long as
1289  * there is progress ( i.e. the number of bits left to be cleared decreases )
1290  * the function continues.
1291  */
1292 static int
1293 qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
1294 {
1295         int prev_weight = 0;
1296         int wait_count = 0;
1297         int weight = 0;
1298
1299         weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1300         prev_weight = weight;
1301
1302         while (weight) {
1303                 msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
1304
1305                 weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1306
1307                 if (prev_weight == weight) {
1308                         wait_count++;
1309                 } else {
1310                         prev_weight = weight;
1311                         wait_count = 0;
1312                 }
1313
1314                 if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
1315                         DP_NOTICE(p_hwfn,
1316                                   "%s bitmap wait timed out (%d cids pending)\n",
1317                                   bmap->name, weight);
1318                         return -EBUSY;
1319                 }
1320         }
1321         return 0;
1322 }
1323
1324 static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
1325 {
1326         int rc;
1327         int i;
1328
1329         rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
1330                                             &p_hwfn->p_rdma_info->tcp_cid_map);
1331         if (rc)
1332                 return rc;
1333
1334         /* Now free the tcp cids from the main cid map */
1335         for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
1336                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);
1337
1338         /* Now wait for all cids to be completed */
1339         return qed_iwarp_wait_cid_map_cleared(p_hwfn,
1340                                               &p_hwfn->p_rdma_info->cid_map);
1341 }
1342
1343 static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
1344 {
1345         struct qed_iwarp_ep *ep;
1346
1347         while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1348                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1349
1350                 ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1351                                       struct qed_iwarp_ep, list_entry);
1352
1353                 if (!ep) {
1354                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1355                         break;
1356                 }
1357                 list_del(&ep->list_entry);
1358
1359                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1360
1361                 if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
1362                         qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);
1363
1364                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
1365         }
1366 }
1367
1368 static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
1369 {
1370         struct qed_iwarp_ep *ep;
1371         int rc = 0;
1372         int count;
1373         u32 cid;
1374         int i;
1375
1376         count = init ? QED_IWARP_PREALLOC_CNT : 1;
1377         for (i = 0; i < count; i++) {
1378                 rc = qed_iwarp_create_ep(p_hwfn, &ep);
1379                 if (rc)
1380                         return rc;
1381
1382                 /* During initialization we allocate from the main pool,
1383                  * afterwards we allocate only from the tcp_cid.
1384                  */
1385                 if (init) {
1386                         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1387                         if (rc)
1388                                 goto err;
1389                         qed_iwarp_set_tcp_cid(p_hwfn, cid);
1390                 } else {
1391                         /* We don't care about the return code, it's ok if
1392                          * tcp_cid remains invalid...in this case we'll
1393                          * defer allocation
1394                          */
1395                         qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
1396                 }
1397
1398                 ep->tcp_cid = cid;
1399
1400                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1401                 list_add_tail(&ep->list_entry,
1402                               &p_hwfn->p_rdma_info->iwarp.ep_free_list);
1403                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1404         }
1405
1406         return rc;
1407
1408 err:
1409         qed_iwarp_destroy_ep(p_hwfn, ep, false);
1410
1411         return rc;
1412 }
1413
1414 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
1415 {
1416         int rc;
1417
1418         /* Allocate bitmap for tcp cid. These are used by passive side
1419          * to ensure it can allocate a tcp cid during dpc that was
1420          * pre-acquired and doesn't require dynamic allocation of ilt
1421          */
1422         rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
1423                                  QED_IWARP_PREALLOC_CNT, "TCP_CID");
1424         if (rc) {
1425                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1426                            "Failed to allocate tcp cid, rc = %d\n", rc);
1427                 return rc;
1428         }
1429
1430         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
1431         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1432
1433         rc = qed_iwarp_prealloc_ep(p_hwfn, true);
1434         if (rc)
1435                 return rc;
1436
1437         return qed_ooo_alloc(p_hwfn);
1438 }
1439
1440 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
1441 {
1442         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1443
1444         qed_ooo_free(p_hwfn);
1445         qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
1446         kfree(iwarp_info->mpa_bufs);
1447         kfree(iwarp_info->partial_fpdus);
1448         kfree(iwarp_info->mpa_intermediate_buf);
1449 }
1450
1451 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
1452 {
1453         struct qed_hwfn *p_hwfn = rdma_cxt;
1454         struct qed_iwarp_ep *ep;
1455         u8 mpa_data_size = 0;
1456         int rc;
1457
1458         ep = iparams->ep_context;
1459         if (!ep) {
1460                 DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
1461                 return -EINVAL;
1462         }
1463
1464         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
1465                    iparams->qp->icid, ep->tcp_cid);
1466
1467         if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
1468             (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
1469                 DP_VERBOSE(p_hwfn,
1470                            QED_MSG_RDMA,
1471                            "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1472                            iparams->qp->icid,
1473                            ep->tcp_cid, iparams->ord, iparams->ord);
1474                 return -EINVAL;
1475         }
1476
1477         qed_iwarp_prealloc_ep(p_hwfn, false);
1478
1479         ep->cb_context = iparams->cb_context;
1480         ep->qp = iparams->qp;
1481         ep->qp->ep = ep;
1482
1483         if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
1484                 /* Negotiate ord/ird: if upperlayer requested ord larger than
1485                  * ird advertised by remote, we need to decrease our ord
1486                  */
1487                 if (iparams->ord > ep->cm_info.ird)
1488                         iparams->ord = ep->cm_info.ird;
1489
1490                 if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
1491                     (iparams->ird == 0))
1492                         iparams->ird = 1;
1493         }
1494
1495         /* Update cm_info ord/ird to be negotiated values */
1496         ep->cm_info.ord = iparams->ord;
1497         ep->cm_info.ird = iparams->ird;
1498
1499         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1500
1501         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1502         ep->cm_info.private_data_len = iparams->private_data_len +
1503                                        mpa_data_size;
1504
1505         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1506                iparams->private_data, iparams->private_data_len);
1507
1508         rc = qed_iwarp_mpa_offload(p_hwfn, ep);
1509         if (rc)
1510                 qed_iwarp_modify_qp(p_hwfn,
1511                                     iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);
1512
1513         return rc;
1514 }
1515
1516 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
1517 {
1518         struct qed_hwfn *p_hwfn = rdma_cxt;
1519         struct qed_iwarp_ep *ep;
1520         u8 mpa_data_size = 0;
1521
1522         ep = iparams->ep_context;
1523         if (!ep) {
1524                 DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
1525                 return -EINVAL;
1526         }
1527
1528         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);
1529
1530         ep->cb_context = iparams->cb_context;
1531         ep->qp = NULL;
1532
1533         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1534
1535         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1536         ep->cm_info.private_data_len = iparams->private_data_len +
1537                                        mpa_data_size;
1538
1539         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1540                iparams->private_data, iparams->private_data_len);
1541
1542         return qed_iwarp_mpa_offload(p_hwfn, ep);
1543 }
1544
1545 static void
1546 qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
1547                         struct qed_iwarp_cm_info *cm_info)
1548 {
1549         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
1550                    cm_info->ip_version);
1551
1552         if (cm_info->ip_version == QED_TCP_IPV4)
1553                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1554                            "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
1555                            cm_info->remote_ip, cm_info->remote_port,
1556                            cm_info->local_ip, cm_info->local_port,
1557                            cm_info->vlan);
1558         else
1559                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1560                            "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
1561                            cm_info->remote_ip, cm_info->remote_port,
1562                            cm_info->local_ip, cm_info->local_port,
1563                            cm_info->vlan);
1564
1565         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1566                    "private_data_len = %x ord = %d, ird = %d\n",
1567                    cm_info->private_data_len, cm_info->ord, cm_info->ird);
1568 }
1569
1570 static int
1571 qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
1572                       struct qed_iwarp_ll2_buff *buf, u8 handle)
1573 {
1574         int rc;
1575
1576         rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
1577                                     (u16)buf->buff_size, buf, 1);
1578         if (rc) {
1579                 DP_NOTICE(p_hwfn,
1580                           "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
1581                           rc, handle);
1582                 dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
1583                                   buf->data, buf->data_phys_addr);
1584                 kfree(buf);
1585         }
1586
1587         return rc;
1588 }
1589
1590 static bool
1591 qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
1592 {
1593         struct qed_iwarp_ep *ep = NULL;
1594         bool found = false;
1595
1596         list_for_each_entry(ep,
1597                             &p_hwfn->p_rdma_info->iwarp.ep_list,
1598                             list_entry) {
1599                 if ((ep->cm_info.local_port == cm_info->local_port) &&
1600                     (ep->cm_info.remote_port == cm_info->remote_port) &&
1601                     (ep->cm_info.vlan == cm_info->vlan) &&
1602                     !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
1603                             sizeof(cm_info->local_ip)) &&
1604                     !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
1605                             sizeof(cm_info->remote_ip))) {
1606                         found = true;
1607                         break;
1608                 }
1609         }
1610
1611         if (found) {
1612                 DP_NOTICE(p_hwfn,
1613                           "SYN received on active connection - dropping\n");
1614                 qed_iwarp_print_cm_info(p_hwfn, cm_info);
1615
1616                 return true;
1617         }
1618
1619         return false;
1620 }
1621
1622 static struct qed_iwarp_listener *
1623 qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
1624                        struct qed_iwarp_cm_info *cm_info)
1625 {
1626         struct qed_iwarp_listener *listener = NULL;
1627         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1628         bool found = false;
1629
1630         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1631
1632         list_for_each_entry(listener,
1633                             &p_hwfn->p_rdma_info->iwarp.listen_list,
1634                             list_entry) {
1635                 if (listener->port == cm_info->local_port) {
1636                         if (!memcmp(listener->ip_addr,
1637                                     ip_zero, sizeof(ip_zero))) {
1638                                 found = true;
1639                                 break;
1640                         }
1641
1642                         if (!memcmp(listener->ip_addr,
1643                                     cm_info->local_ip,
1644                                     sizeof(cm_info->local_ip)) &&
1645                             (listener->vlan == cm_info->vlan)) {
1646                                 found = true;
1647                                 break;
1648                         }
1649                 }
1650         }
1651
1652         if (found) {
1653                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
1654                            listener);
1655                 return listener;
1656         }
1657
1658         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
1659         return NULL;
1660 }
1661
1662 static int
1663 qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
1664                        struct qed_iwarp_cm_info *cm_info,
1665                        void *buf,
1666                        u8 *remote_mac_addr,
1667                        u8 *local_mac_addr,
1668                        int *payload_len, int *tcp_start_offset)
1669 {
1670         struct vlan_ethhdr *vethh;
1671         bool vlan_valid = false;
1672         struct ipv6hdr *ip6h;
1673         struct ethhdr *ethh;
1674         struct tcphdr *tcph;
1675         struct iphdr *iph;
1676         int eth_hlen;
1677         int ip_hlen;
1678         int eth_type;
1679         int i;
1680
1681         ethh = buf;
1682         eth_type = ntohs(ethh->h_proto);
1683         if (eth_type == ETH_P_8021Q) {
1684                 vlan_valid = true;
1685                 vethh = (struct vlan_ethhdr *)ethh;
1686                 cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
1687                 eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
1688         }
1689
1690         eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);
1691
1692         ether_addr_copy(remote_mac_addr, ethh->h_source);
1693         ether_addr_copy(local_mac_addr, ethh->h_dest);
1694
1695         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
1696                    eth_type, ethh->h_source);
1697
1698         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
1699                    eth_hlen, ethh->h_dest);
1700
1701         iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
1702
1703         if (eth_type == ETH_P_IP) {
1704                 if (iph->protocol != IPPROTO_TCP) {
1705                         DP_NOTICE(p_hwfn,
1706                                   "Unexpected ip protocol on ll2 %x\n",
1707                                   iph->protocol);
1708                         return -EINVAL;
1709                 }
1710
1711                 cm_info->local_ip[0] = ntohl(iph->daddr);
1712                 cm_info->remote_ip[0] = ntohl(iph->saddr);
1713                 cm_info->ip_version = QED_TCP_IPV4;
1714
1715                 ip_hlen = (iph->ihl) * sizeof(u32);
1716                 *payload_len = ntohs(iph->tot_len) - ip_hlen;
1717         } else if (eth_type == ETH_P_IPV6) {
1718                 ip6h = (struct ipv6hdr *)iph;
1719
1720                 if (ip6h->nexthdr != IPPROTO_TCP) {
1721                         DP_NOTICE(p_hwfn,
1722                                   "Unexpected ip protocol on ll2 %x\n",
1723                                   iph->protocol);
1724                         return -EINVAL;
1725                 }
1726
1727                 for (i = 0; i < 4; i++) {
1728                         cm_info->local_ip[i] =
1729                             ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
1730                         cm_info->remote_ip[i] =
1731                             ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
1732                 }
1733                 cm_info->ip_version = QED_TCP_IPV6;
1734
1735                 ip_hlen = sizeof(*ip6h);
1736                 *payload_len = ntohs(ip6h->payload_len);
1737         } else {
1738                 DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
1739                 return -EINVAL;
1740         }
1741
1742         tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);
1743
1744         if (!tcph->syn) {
1745                 DP_NOTICE(p_hwfn,
1746                           "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
1747                           iph->ihl, tcph->source, tcph->dest);
1748                 return -EINVAL;
1749         }
1750
1751         cm_info->local_port = ntohs(tcph->dest);
1752         cm_info->remote_port = ntohs(tcph->source);
1753
1754         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1755
1756         *tcp_start_offset = eth_hlen + ip_hlen;
1757
1758         return 0;
1759 }
1760
1761 static struct qed_iwarp_fpdu *qed_iwarp_get_curr_fpdu(struct qed_hwfn *p_hwfn,
1762                                                       u16 cid)
1763 {
1764         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1765         struct qed_iwarp_fpdu *partial_fpdu;
1766         u32 idx;
1767
1768         idx = cid - qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_IWARP);
1769         if (idx >= iwarp_info->max_num_partial_fpdus) {
1770                 DP_ERR(p_hwfn, "Invalid cid %x max_num_partial_fpdus=%x\n", cid,
1771                        iwarp_info->max_num_partial_fpdus);
1772                 return NULL;
1773         }
1774
1775         partial_fpdu = &iwarp_info->partial_fpdus[idx];
1776
1777         return partial_fpdu;
1778 }
1779
1780 enum qed_iwarp_mpa_pkt_type {
1781         QED_IWARP_MPA_PKT_PACKED,
1782         QED_IWARP_MPA_PKT_PARTIAL,
1783         QED_IWARP_MPA_PKT_UNALIGNED
1784 };
1785
1786 #define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
1787 #define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
1788 #define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)
1789
1790 /* Pad to multiple of 4 */
1791 #define QED_IWARP_PDU_DATA_LEN_WITH_PAD(data_len) ALIGN(data_len, 4)
1792 #define QED_IWARP_FPDU_LEN_WITH_PAD(_mpa_len)                              \
1793         (QED_IWARP_PDU_DATA_LEN_WITH_PAD((_mpa_len) +                      \
1794                                          QED_IWARP_MPA_FPDU_LENGTH_SIZE) + \
1795                                          QED_IWARP_MPA_CRC32_DIGEST_SIZE)
1796
1797 /* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
1798 #define QED_IWARP_MAX_BDS_PER_FPDU 3
1799
1800 static const char * const pkt_type_str[] = {
1801         "QED_IWARP_MPA_PKT_PACKED",
1802         "QED_IWARP_MPA_PKT_PARTIAL",
1803         "QED_IWARP_MPA_PKT_UNALIGNED"
1804 };
1805
1806 static int
1807 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1808                       struct qed_iwarp_fpdu *fpdu,
1809                       struct qed_iwarp_ll2_buff *buf);
1810
1811 static enum qed_iwarp_mpa_pkt_type
1812 qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
1813                        struct qed_iwarp_fpdu *fpdu,
1814                        u16 tcp_payload_len, u8 *mpa_data)
1815 {
1816         enum qed_iwarp_mpa_pkt_type pkt_type;
1817         u16 mpa_len;
1818
1819         if (fpdu->incomplete_bytes) {
1820                 pkt_type = QED_IWARP_MPA_PKT_UNALIGNED;
1821                 goto out;
1822         }
1823
1824         /* special case of one byte remaining...
1825          * lower byte will be read next packet
1826          */
1827         if (tcp_payload_len == 1) {
1828                 fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
1829                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1830                 goto out;
1831         }
1832
1833         mpa_len = ntohs(*((u16 *)(mpa_data)));
1834         fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1835
1836         if (fpdu->fpdu_length <= tcp_payload_len)
1837                 pkt_type = QED_IWARP_MPA_PKT_PACKED;
1838         else
1839                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1840
1841 out:
1842         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1843                    "MPA_ALIGN: %s: fpdu_length=0x%x tcp_payload_len:0x%x\n",
1844                    pkt_type_str[pkt_type], fpdu->fpdu_length, tcp_payload_len);
1845
1846         return pkt_type;
1847 }
1848
1849 static void
1850 qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
1851                     struct qed_iwarp_fpdu *fpdu,
1852                     struct unaligned_opaque_data *pkt_data,
1853                     u16 tcp_payload_size, u8 placement_offset)
1854 {
1855         fpdu->mpa_buf = buf;
1856         fpdu->pkt_hdr = buf->data_phys_addr + placement_offset;
1857         fpdu->pkt_hdr_size = pkt_data->tcp_payload_offset;
1858         fpdu->mpa_frag = buf->data_phys_addr + pkt_data->first_mpa_offset;
1859         fpdu->mpa_frag_virt = (u8 *)(buf->data) + pkt_data->first_mpa_offset;
1860
1861         if (tcp_payload_size == 1)
1862                 fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
1863         else if (tcp_payload_size < fpdu->fpdu_length)
1864                 fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
1865         else
1866                 fpdu->incomplete_bytes = 0;     /* complete fpdu */
1867
1868         fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
1869 }
1870
1871 static int
1872 qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn,
1873                  struct qed_iwarp_fpdu *fpdu,
1874                  struct unaligned_opaque_data *pkt_data,
1875                  struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size)
1876 {
1877         u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf;
1878         int rc;
1879
1880         /* need to copy the data from the partial packet stored in fpdu
1881          * to the new buf, for this we also need to move the data currently
1882          * placed on the buf. The assumption is that the buffer is big enough
1883          * since fpdu_length <= mss, we use an intermediate buffer since
1884          * we may need to copy the new data to an overlapping location
1885          */
1886         if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) {
1887                 DP_ERR(p_hwfn,
1888                        "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",
1889                        buf->buff_size, fpdu->mpa_frag_len,
1890                        tcp_payload_size, fpdu->incomplete_bytes);
1891                 return -EINVAL;
1892         }
1893
1894         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1895                    "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n",
1896                    fpdu->mpa_frag_virt, fpdu->mpa_frag_len,
1897                    (u8 *)(buf->data) + pkt_data->first_mpa_offset,
1898                    tcp_payload_size);
1899
1900         memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len);
1901         memcpy(tmp_buf + fpdu->mpa_frag_len,
1902                (u8 *)(buf->data) + pkt_data->first_mpa_offset,
1903                tcp_payload_size);
1904
1905         rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf);
1906         if (rc)
1907                 return rc;
1908
1909         /* If we managed to post the buffer copy the data to the new buffer
1910          * o/w this will occur in the next round...
1911          */
1912         memcpy((u8 *)(buf->data), tmp_buf,
1913                fpdu->mpa_frag_len + tcp_payload_size);
1914
1915         fpdu->mpa_buf = buf;
1916         /* fpdu->pkt_hdr remains as is */
1917         /* fpdu->mpa_frag is overridden with new buf */
1918         fpdu->mpa_frag = buf->data_phys_addr;
1919         fpdu->mpa_frag_virt = buf->data;
1920         fpdu->mpa_frag_len += tcp_payload_size;
1921
1922         fpdu->incomplete_bytes -= tcp_payload_size;
1923
1924         DP_VERBOSE(p_hwfn,
1925                    QED_MSG_RDMA,
1926                    "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1927                    buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size,
1928                    fpdu->incomplete_bytes);
1929
1930         return 0;
1931 }
1932
1933 static void
1934 qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
1935                              struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
1936 {
1937         u16 mpa_len;
1938
1939         /* Update incomplete packets if needed */
1940         if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
1941                 /* Missing lower byte is now available */
1942                 mpa_len = fpdu->fpdu_length | *mpa_data;
1943                 fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1944                 /* one byte of hdr */
1945                 fpdu->mpa_frag_len = 1;
1946                 fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
1947                 DP_VERBOSE(p_hwfn,
1948                            QED_MSG_RDMA,
1949                            "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
1950                            mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
1951         }
1952 }
1953
1954 #define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \
1955         (GET_FIELD((_curr_pkt)->flags,     \
1956                    UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE))
1957
1958 /* This function is used to recycle a buffer using the ll2 drop option. It
1959  * uses the mechanism to ensure that all buffers posted to tx before this one
1960  * were completed. The buffer sent here will be sent as a cookie in the tx
1961  * completion function and can then be reposted to rx chain when done. The flow
1962  * that requires this is the flow where a FPDU splits over more than 3 tcp
1963  * segments. In this case the driver needs to re-post a rx buffer instead of
1964  * the one received, but driver can't simply repost a buffer it copied from
1965  * as there is a case where the buffer was originally a packed FPDU, and is
1966  * partially posted to FW. Driver needs to ensure FW is done with it.
1967  */
1968 static int
1969 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1970                       struct qed_iwarp_fpdu *fpdu,
1971                       struct qed_iwarp_ll2_buff *buf)
1972 {
1973         struct qed_ll2_tx_pkt_info tx_pkt;
1974         u8 ll2_handle;
1975         int rc;
1976
1977         memset(&tx_pkt, 0, sizeof(tx_pkt));
1978         tx_pkt.num_of_bds = 1;
1979         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
1980         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
1981         tx_pkt.first_frag = fpdu->pkt_hdr;
1982         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
1983         buf->piggy_buf = NULL;
1984         tx_pkt.cookie = buf;
1985
1986         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
1987
1988         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
1989         if (rc)
1990                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1991                            "Can't drop packet rc=%d\n", rc);
1992
1993         DP_VERBOSE(p_hwfn,
1994                    QED_MSG_RDMA,
1995                    "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n",
1996                    (unsigned long int)tx_pkt.first_frag,
1997                    tx_pkt.first_frag_len, buf, rc);
1998
1999         return rc;
2000 }
2001
2002 static int
2003 qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu)
2004 {
2005         struct qed_ll2_tx_pkt_info tx_pkt;
2006         u8 ll2_handle;
2007         int rc;
2008
2009         memset(&tx_pkt, 0, sizeof(tx_pkt));
2010         tx_pkt.num_of_bds = 1;
2011         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2012         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
2013
2014         tx_pkt.first_frag = fpdu->pkt_hdr;
2015         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2016         tx_pkt.enable_ip_cksum = true;
2017         tx_pkt.enable_l4_cksum = true;
2018         tx_pkt.calc_ip_len = true;
2019         /* vlan overload with enum iwarp_ll2_tx_queues */
2020         tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE;
2021
2022         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2023
2024         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2025         if (rc)
2026                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2027                            "Can't send right edge rc=%d\n", rc);
2028         DP_VERBOSE(p_hwfn,
2029                    QED_MSG_RDMA,
2030                    "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n",
2031                    tx_pkt.num_of_bds,
2032                    (unsigned long int)tx_pkt.first_frag,
2033                    tx_pkt.first_frag_len, rc);
2034
2035         return rc;
2036 }
2037
2038 static int
2039 qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
2040                     struct qed_iwarp_fpdu *fpdu,
2041                     struct unaligned_opaque_data *curr_pkt,
2042                     struct qed_iwarp_ll2_buff *buf,
2043                     u16 tcp_payload_size, enum qed_iwarp_mpa_pkt_type pkt_type)
2044 {
2045         struct qed_ll2_tx_pkt_info tx_pkt;
2046         u8 ll2_handle;
2047         int rc;
2048
2049         memset(&tx_pkt, 0, sizeof(tx_pkt));
2050
2051         /* An unaligned packet means it's split over two tcp segments. So the
2052          * complete packet requires 3 bds, one for the header, one for the
2053          * part of the fpdu of the first tcp segment, and the last fragment
2054          * will point to the remainder of the fpdu. A packed pdu, requires only
2055          * two bds, one for the header and one for the data.
2056          */
2057         tx_pkt.num_of_bds = (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED) ? 3 : 2;
2058         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2059         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; /* offset in words */
2060
2061         /* Send the mpa_buf only with the last fpdu (in case of packed) */
2062         if (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED ||
2063             tcp_payload_size <= fpdu->fpdu_length)
2064                 tx_pkt.cookie = fpdu->mpa_buf;
2065
2066         tx_pkt.first_frag = fpdu->pkt_hdr;
2067         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2068         tx_pkt.enable_ip_cksum = true;
2069         tx_pkt.enable_l4_cksum = true;
2070         tx_pkt.calc_ip_len = true;
2071         /* vlan overload with enum iwarp_ll2_tx_queues */
2072         tx_pkt.vlan = IWARP_LL2_ALIGNED_TX_QUEUE;
2073
2074         /* special case of unaligned packet and not packed, need to send
2075          * both buffers as cookie to release.
2076          */
2077         if (tcp_payload_size == fpdu->incomplete_bytes)
2078                 fpdu->mpa_buf->piggy_buf = buf;
2079
2080         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2081
2082         /* Set first fragment to header */
2083         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2084         if (rc)
2085                 goto out;
2086
2087         /* Set second fragment to first part of packet */
2088         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, ll2_handle,
2089                                                fpdu->mpa_frag,
2090                                                fpdu->mpa_frag_len);
2091         if (rc)
2092                 goto out;
2093
2094         if (!fpdu->incomplete_bytes)
2095                 goto out;
2096
2097         /* Set third fragment to second part of the packet */
2098         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2099                                                ll2_handle,
2100                                                buf->data_phys_addr +
2101                                                curr_pkt->first_mpa_offset,
2102                                                fpdu->incomplete_bytes);
2103 out:
2104         DP_VERBOSE(p_hwfn,
2105                    QED_MSG_RDMA,
2106                    "MPA_ALIGN: Sent FPDU num_bds=%d first_frag_len=%x, mpa_frag_len=0x%x, incomplete_bytes:0x%x rc=%d\n",
2107                    tx_pkt.num_of_bds,
2108                    tx_pkt.first_frag_len,
2109                    fpdu->mpa_frag_len,
2110                    fpdu->incomplete_bytes, rc);
2111
2112         return rc;
2113 }
2114
2115 static void
2116 qed_iwarp_mpa_get_data(struct qed_hwfn *p_hwfn,
2117                        struct unaligned_opaque_data *curr_pkt,
2118                        u32 opaque_data0, u32 opaque_data1)
2119 {
2120         u64 opaque_data;
2121
2122         opaque_data = HILO_64(opaque_data1, opaque_data0);
2123         *curr_pkt = *((struct unaligned_opaque_data *)&opaque_data);
2124
2125         curr_pkt->first_mpa_offset = curr_pkt->tcp_payload_offset +
2126                                      le16_to_cpu(curr_pkt->first_mpa_offset);
2127         curr_pkt->cid = le32_to_cpu(curr_pkt->cid);
2128 }
2129
2130 /* This function is called when an unaligned or incomplete MPA packet arrives
2131  * driver needs to align the packet, perhaps using previous data and send
2132  * it down to FW once it is aligned.
2133  */
2134 static int
2135 qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
2136                           struct qed_iwarp_ll2_mpa_buf *mpa_buf)
2137 {
2138         struct unaligned_opaque_data *curr_pkt = &mpa_buf->data;
2139         struct qed_iwarp_ll2_buff *buf = mpa_buf->ll2_buf;
2140         enum qed_iwarp_mpa_pkt_type pkt_type;
2141         struct qed_iwarp_fpdu *fpdu;
2142         int rc = -EINVAL;
2143         u8 *mpa_data;
2144
2145         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, curr_pkt->cid & 0xffff);
2146         if (!fpdu) { /* something corrupt with cid, post rx back */
2147                 DP_ERR(p_hwfn, "Invalid cid, drop and post back to rx cid=%x\n",
2148                        curr_pkt->cid);
2149                 goto err;
2150         }
2151
2152         do {
2153                 mpa_data = ((u8 *)(buf->data) + curr_pkt->first_mpa_offset);
2154
2155                 pkt_type = qed_iwarp_mpa_classify(p_hwfn, fpdu,
2156                                                   mpa_buf->tcp_payload_len,
2157                                                   mpa_data);
2158
2159                 switch (pkt_type) {
2160                 case QED_IWARP_MPA_PKT_PARTIAL:
2161                         qed_iwarp_init_fpdu(buf, fpdu,
2162                                             curr_pkt,
2163                                             mpa_buf->tcp_payload_len,
2164                                             mpa_buf->placement_offset);
2165
2166                         if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2167                                 mpa_buf->tcp_payload_len = 0;
2168                                 break;
2169                         }
2170
2171                         rc = qed_iwarp_win_right_edge(p_hwfn, fpdu);
2172
2173                         if (rc) {
2174                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2175                                            "Can't send FPDU:reset rc=%d\n", rc);
2176                                 memset(fpdu, 0, sizeof(*fpdu));
2177                                 break;
2178                         }
2179
2180                         mpa_buf->tcp_payload_len = 0;
2181                         break;
2182                 case QED_IWARP_MPA_PKT_PACKED:
2183                         qed_iwarp_init_fpdu(buf, fpdu,
2184                                             curr_pkt,
2185                                             mpa_buf->tcp_payload_len,
2186                                             mpa_buf->placement_offset);
2187
2188                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2189                                                  mpa_buf->tcp_payload_len,
2190                                                  pkt_type);
2191                         if (rc) {
2192                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2193                                            "Can't send FPDU:reset rc=%d\n", rc);
2194                                 memset(fpdu, 0, sizeof(*fpdu));
2195                                 break;
2196                         }
2197
2198                         mpa_buf->tcp_payload_len -= fpdu->fpdu_length;
2199                         curr_pkt->first_mpa_offset += fpdu->fpdu_length;
2200                         break;
2201                 case QED_IWARP_MPA_PKT_UNALIGNED:
2202                         qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
2203                         if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) {
2204                                 /* special handling of fpdu split over more
2205                                  * than 2 segments
2206                                  */
2207                                 if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2208                                         rc = qed_iwarp_win_right_edge(p_hwfn,
2209                                                                       fpdu);
2210                                         /* packet will be re-processed later */
2211                                         if (rc)
2212                                                 return rc;
2213                                 }
2214
2215                                 rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt,
2216                                                       buf,
2217                                                       mpa_buf->tcp_payload_len);
2218                                 if (rc) /* packet will be re-processed later */
2219                                         return rc;
2220
2221                                 mpa_buf->tcp_payload_len = 0;
2222                                 break;
2223                         }
2224
2225                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2226                                                  mpa_buf->tcp_payload_len,
2227                                                  pkt_type);
2228                         if (rc) {
2229                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2230                                            "Can't send FPDU:delay rc=%d\n", rc);
2231                                 /* don't reset fpdu -> we need it for next
2232                                  * classify
2233                                  */
2234                                 break;
2235                         }
2236
2237                         mpa_buf->tcp_payload_len -= fpdu->incomplete_bytes;
2238                         curr_pkt->first_mpa_offset += fpdu->incomplete_bytes;
2239                         /* The framed PDU was sent - no more incomplete bytes */
2240                         fpdu->incomplete_bytes = 0;
2241                         break;
2242                 }
2243         } while (mpa_buf->tcp_payload_len && !rc);
2244
2245         return rc;
2246
2247 err:
2248         qed_iwarp_ll2_post_rx(p_hwfn,
2249                               buf,
2250                               p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle);
2251         return rc;
2252 }
2253
2254 static void qed_iwarp_process_pending_pkts(struct qed_hwfn *p_hwfn)
2255 {
2256         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2257         struct qed_iwarp_ll2_mpa_buf *mpa_buf = NULL;
2258         int rc;
2259
2260         while (!list_empty(&iwarp_info->mpa_buf_pending_list)) {
2261                 mpa_buf = list_first_entry(&iwarp_info->mpa_buf_pending_list,
2262                                            struct qed_iwarp_ll2_mpa_buf,
2263                                            list_entry);
2264
2265                 rc = qed_iwarp_process_mpa_pkt(p_hwfn, mpa_buf);
2266
2267                 /* busy means break and continue processing later, don't
2268                  * remove the buf from the pending list.
2269                  */
2270                 if (rc == -EBUSY)
2271                         break;
2272
2273                 list_del(&mpa_buf->list_entry);
2274                 list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_list);
2275
2276                 if (rc) {       /* different error, don't continue */
2277                         DP_NOTICE(p_hwfn, "process pkts failed rc=%d\n", rc);
2278                         break;
2279                 }
2280         }
2281 }
2282
2283 static void
2284 qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2285 {
2286         struct qed_iwarp_ll2_mpa_buf *mpa_buf;
2287         struct qed_iwarp_info *iwarp_info;
2288         struct qed_hwfn *p_hwfn = cxt;
2289
2290         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2291         mpa_buf = list_first_entry(&iwarp_info->mpa_buf_list,
2292                                    struct qed_iwarp_ll2_mpa_buf, list_entry);
2293         if (!mpa_buf) {
2294                 DP_ERR(p_hwfn, "No free mpa buf\n");
2295                 goto err;
2296         }
2297
2298         list_del(&mpa_buf->list_entry);
2299         qed_iwarp_mpa_get_data(p_hwfn, &mpa_buf->data,
2300                                data->opaque_data_0, data->opaque_data_1);
2301
2302         DP_VERBOSE(p_hwfn,
2303                    QED_MSG_RDMA,
2304                    "LL2 MPA CompRx payload_len:0x%x\tfirst_mpa_offset:0x%x\ttcp_payload_offset:0x%x\tflags:0x%x\tcid:0x%x\n",
2305                    data->length.packet_length, mpa_buf->data.first_mpa_offset,
2306                    mpa_buf->data.tcp_payload_offset, mpa_buf->data.flags,
2307                    mpa_buf->data.cid);
2308
2309         mpa_buf->ll2_buf = data->cookie;
2310         mpa_buf->tcp_payload_len = data->length.packet_length -
2311                                    mpa_buf->data.first_mpa_offset;
2312         mpa_buf->data.first_mpa_offset += data->u.placement_offset;
2313         mpa_buf->placement_offset = data->u.placement_offset;
2314
2315         list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_pending_list);
2316
2317         qed_iwarp_process_pending_pkts(p_hwfn);
2318         return;
2319 err:
2320         qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
2321                               iwarp_info->ll2_mpa_handle);
2322 }
2323
2324 static void
2325 qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2326 {
2327         struct qed_iwarp_ll2_buff *buf = data->cookie;
2328         struct qed_iwarp_listener *listener;
2329         struct qed_ll2_tx_pkt_info tx_pkt;
2330         struct qed_iwarp_cm_info cm_info;
2331         struct qed_hwfn *p_hwfn = cxt;
2332         u8 remote_mac_addr[ETH_ALEN];
2333         u8 local_mac_addr[ETH_ALEN];
2334         struct qed_iwarp_ep *ep;
2335         int tcp_start_offset;
2336         u8 ll2_syn_handle;
2337         int payload_len;
2338         u32 hdr_size;
2339         int rc;
2340
2341         memset(&cm_info, 0, sizeof(cm_info));
2342         ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2343
2344         /* Check if packet was received with errors... */
2345         if (data->err_flags) {
2346                 DP_NOTICE(p_hwfn, "Error received on SYN packet: 0x%x\n",
2347                           data->err_flags);
2348                 goto err;
2349         }
2350
2351         if (GET_FIELD(data->parse_flags,
2352                       PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
2353             GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
2354                 DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
2355                 goto err;
2356         }
2357
2358         rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
2359                                     data->u.placement_offset, remote_mac_addr,
2360                                     local_mac_addr, &payload_len,
2361                                     &tcp_start_offset);
2362         if (rc)
2363                 goto err;
2364
2365         /* Check if there is a listener for this 4-tuple+vlan */
2366         listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
2367         if (!listener) {
2368                 DP_VERBOSE(p_hwfn,
2369                            QED_MSG_RDMA,
2370                            "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
2371                            data->parse_flags, data->length.packet_length);
2372
2373                 memset(&tx_pkt, 0, sizeof(tx_pkt));
2374                 tx_pkt.num_of_bds = 1;
2375                 tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
2376                 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2377                 tx_pkt.first_frag = buf->data_phys_addr +
2378                                     data->u.placement_offset;
2379                 tx_pkt.first_frag_len = data->length.packet_length;
2380                 tx_pkt.cookie = buf;
2381
2382                 rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
2383                                                &tx_pkt, true);
2384
2385                 if (rc) {
2386                         DP_NOTICE(p_hwfn,
2387                                   "Can't post SYN back to chip rc=%d\n", rc);
2388                         goto err;
2389                 }
2390                 return;
2391         }
2392
2393         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
2394         /* There may be an open ep on this connection if this is a syn
2395          * retrasnmit... need to make sure there isn't...
2396          */
2397         if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
2398                 goto err;
2399
2400         ep = qed_iwarp_get_free_ep(p_hwfn);
2401         if (!ep)
2402                 goto err;
2403
2404         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2405         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
2406         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2407
2408         ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
2409         ether_addr_copy(ep->local_mac_addr, local_mac_addr);
2410
2411         memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));
2412
2413         hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60);
2414         ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
2415         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
2416
2417         ep->event_cb = listener->event_cb;
2418         ep->cb_context = listener->cb_context;
2419         ep->connect_mode = TCP_CONNECT_PASSIVE;
2420
2421         ep->syn = buf;
2422         ep->syn_ip_payload_length = (u16)payload_len;
2423         ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
2424                            tcp_start_offset;
2425
2426         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
2427         if (rc) {
2428                 qed_iwarp_return_ep(p_hwfn, ep);
2429                 goto err;
2430         }
2431
2432         return;
2433 err:
2434         qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
2435 }
2436
2437 static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
2438                                      void *cookie, dma_addr_t rx_buf_addr,
2439                                      bool b_last_packet)
2440 {
2441         struct qed_iwarp_ll2_buff *buffer = cookie;
2442         struct qed_hwfn *p_hwfn = cxt;
2443
2444         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2445                           buffer->data, buffer->data_phys_addr);
2446         kfree(buffer);
2447 }
2448
2449 static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
2450                                       void *cookie, dma_addr_t first_frag_addr,
2451                                       bool b_last_fragment, bool b_last_packet)
2452 {
2453         struct qed_iwarp_ll2_buff *buffer = cookie;
2454         struct qed_iwarp_ll2_buff *piggy;
2455         struct qed_hwfn *p_hwfn = cxt;
2456
2457         if (!buffer)            /* can happen in packed mpa unaligned... */
2458                 return;
2459
2460         /* this was originally an rx packet, post it back */
2461         piggy = buffer->piggy_buf;
2462         if (piggy) {
2463                 buffer->piggy_buf = NULL;
2464                 qed_iwarp_ll2_post_rx(p_hwfn, piggy, connection_handle);
2465         }
2466
2467         qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);
2468
2469         if (connection_handle == p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle)
2470                 qed_iwarp_process_pending_pkts(p_hwfn);
2471
2472         return;
2473 }
2474
2475 static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
2476                                      void *cookie, dma_addr_t first_frag_addr,
2477                                      bool b_last_fragment, bool b_last_packet)
2478 {
2479         struct qed_iwarp_ll2_buff *buffer = cookie;
2480         struct qed_hwfn *p_hwfn = cxt;
2481
2482         if (!buffer)
2483                 return;
2484
2485         if (buffer->piggy_buf) {
2486                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2487                                   buffer->piggy_buf->buff_size,
2488                                   buffer->piggy_buf->data,
2489                                   buffer->piggy_buf->data_phys_addr);
2490
2491                 kfree(buffer->piggy_buf);
2492         }
2493
2494         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2495                           buffer->data, buffer->data_phys_addr);
2496
2497         kfree(buffer);
2498 }
2499
2500 /* The only slowpath for iwarp ll2 is unalign flush. When this completion
2501  * is received, need to reset the FPDU.
2502  */
2503 static void
2504 qed_iwarp_ll2_slowpath(void *cxt,
2505                        u8 connection_handle,
2506                        u32 opaque_data_0, u32 opaque_data_1)
2507 {
2508         struct unaligned_opaque_data unalign_data;
2509         struct qed_hwfn *p_hwfn = cxt;
2510         struct qed_iwarp_fpdu *fpdu;
2511
2512         qed_iwarp_mpa_get_data(p_hwfn, &unalign_data,
2513                                opaque_data_0, opaque_data_1);
2514
2515         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "(0x%x) Flush fpdu\n",
2516                    unalign_data.cid);
2517
2518         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)unalign_data.cid);
2519         if (fpdu)
2520                 memset(fpdu, 0, sizeof(*fpdu));
2521 }
2522
2523 static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2524 {
2525         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2526         int rc = 0;
2527
2528         if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
2529                 rc = qed_ll2_terminate_connection(p_hwfn,
2530                                                   iwarp_info->ll2_syn_handle);
2531                 if (rc)
2532                         DP_INFO(p_hwfn, "Failed to terminate syn connection\n");
2533
2534                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2535                 iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2536         }
2537
2538         if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
2539                 rc = qed_ll2_terminate_connection(p_hwfn,
2540                                                   iwarp_info->ll2_ooo_handle);
2541                 if (rc)
2542                         DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");
2543
2544                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2545                 iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2546         }
2547
2548         if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
2549                 rc = qed_ll2_terminate_connection(p_hwfn,
2550                                                   iwarp_info->ll2_mpa_handle);
2551                 if (rc)
2552                         DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");
2553
2554                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2555                 iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2556         }
2557
2558         qed_llh_remove_mac_filter(p_hwfn,
2559                                   p_ptt, p_hwfn->p_rdma_info->iwarp.mac_addr);
2560         return rc;
2561 }
2562
2563 static int
2564 qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
2565                             int num_rx_bufs, int buff_size, u8 ll2_handle)
2566 {
2567         struct qed_iwarp_ll2_buff *buffer;
2568         int rc = 0;
2569         int i;
2570
2571         for (i = 0; i < num_rx_bufs; i++) {
2572                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2573                 if (!buffer) {
2574                         rc = -ENOMEM;
2575                         break;
2576                 }
2577
2578                 buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
2579                                                   buff_size,
2580                                                   &buffer->data_phys_addr,
2581                                                   GFP_KERNEL);
2582                 if (!buffer->data) {
2583                         kfree(buffer);
2584                         rc = -ENOMEM;
2585                         break;
2586                 }
2587
2588                 buffer->buff_size = buff_size;
2589                 rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
2590                 if (rc)
2591                         /* buffers will be deallocated by qed_ll2 */
2592                         break;
2593         }
2594         return rc;
2595 }
2596
2597 #define QED_IWARP_MAX_BUF_SIZE(mtu)                                  \
2598         ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
2599                 ETH_CACHE_LINE_SIZE)
2600
2601 static int
2602 qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
2603                     struct qed_rdma_start_in_params *params,
2604                     struct qed_ptt *p_ptt)
2605 {
2606         struct qed_iwarp_info *iwarp_info;
2607         struct qed_ll2_acquire_data data;
2608         struct qed_ll2_cbs cbs;
2609         u32 mpa_buff_size;
2610         u16 n_ooo_bufs;
2611         int rc = 0;
2612         int i;
2613
2614         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2615         iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2616         iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2617         iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2618
2619         iwarp_info->max_mtu = params->max_mtu;
2620
2621         ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);
2622
2623         rc = qed_llh_add_mac_filter(p_hwfn, p_ptt, params->mac_addr);
2624         if (rc)
2625                 return rc;
2626
2627         /* Start SYN connection */
2628         cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
2629         cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
2630         cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
2631         cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
2632         cbs.cookie = p_hwfn;
2633
2634         memset(&data, 0, sizeof(data));
2635         data.input.conn_type = QED_LL2_TYPE_IWARP;
2636         data.input.mtu = QED_IWARP_MAX_SYN_PKT_SIZE;
2637         data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
2638         data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
2639         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2640         data.input.tx_tc = PKT_LB_TC;
2641         data.input.tx_dest = QED_LL2_TX_DEST_LB;
2642         data.p_connection_handle = &iwarp_info->ll2_syn_handle;
2643         data.cbs = &cbs;
2644
2645         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2646         if (rc) {
2647                 DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
2648                 qed_llh_remove_mac_filter(p_hwfn, p_ptt, params->mac_addr);
2649                 return rc;
2650         }
2651
2652         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2653         if (rc) {
2654                 DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
2655                 goto err;
2656         }
2657
2658         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2659                                          QED_IWARP_LL2_SYN_RX_SIZE,
2660                                          QED_IWARP_MAX_SYN_PKT_SIZE,
2661                                          iwarp_info->ll2_syn_handle);
2662         if (rc)
2663                 goto err;
2664
2665         /* Start OOO connection */
2666         data.input.conn_type = QED_LL2_TYPE_OOO;
2667         data.input.mtu = params->max_mtu;
2668
2669         n_ooo_bufs = (QED_IWARP_MAX_OOO * QED_IWARP_RCV_WND_SIZE_DEF) /
2670                      iwarp_info->max_mtu;
2671         n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);
2672
2673         data.input.rx_num_desc = n_ooo_bufs;
2674         data.input.rx_num_ooo_buffers = n_ooo_bufs;
2675
2676         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2677         data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
2678         data.p_connection_handle = &iwarp_info->ll2_ooo_handle;
2679
2680         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2681         if (rc)
2682                 goto err;
2683
2684         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2685         if (rc)
2686                 goto err;
2687
2688         /* Start Unaligned MPA connection */
2689         cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
2690         cbs.slowpath_cb = qed_iwarp_ll2_slowpath;
2691
2692         memset(&data, 0, sizeof(data));
2693         data.input.conn_type = QED_LL2_TYPE_IWARP;
2694         data.input.mtu = params->max_mtu;
2695         /* FW requires that once a packet arrives OOO, it must have at
2696          * least 2 rx buffers available on the unaligned connection
2697          * for handling the case that it is a partial fpdu.
2698          */
2699         data.input.rx_num_desc = n_ooo_bufs * 2;
2700         data.input.tx_num_desc = data.input.rx_num_desc;
2701         data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
2702         data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
2703         data.input.secondary_queue = true;
2704         data.cbs = &cbs;
2705
2706         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2707         if (rc)
2708                 goto err;
2709
2710         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2711         if (rc)
2712                 goto err;
2713
2714         mpa_buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
2715         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2716                                          data.input.rx_num_desc,
2717                                          mpa_buff_size,
2718                                          iwarp_info->ll2_mpa_handle);
2719         if (rc)
2720                 goto err;
2721
2722         iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
2723                                             sizeof(*iwarp_info->partial_fpdus),
2724                                             GFP_KERNEL);
2725         if (!iwarp_info->partial_fpdus)
2726                 goto err;
2727
2728         iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps;
2729
2730         iwarp_info->mpa_intermediate_buf = kzalloc(mpa_buff_size, GFP_KERNEL);
2731         if (!iwarp_info->mpa_intermediate_buf)
2732                 goto err;
2733
2734         /* The mpa_bufs array serves for pending RX packets received on the
2735          * mpa ll2 that don't have place on the tx ring and require later
2736          * processing. We can't fail on allocation of such a struct therefore
2737          * we allocate enough to take care of all rx packets
2738          */
2739         iwarp_info->mpa_bufs = kcalloc(data.input.rx_num_desc,
2740                                        sizeof(*iwarp_info->mpa_bufs),
2741                                        GFP_KERNEL);
2742         if (!iwarp_info->mpa_bufs)
2743                 goto err;
2744
2745         INIT_LIST_HEAD(&iwarp_info->mpa_buf_pending_list);
2746         INIT_LIST_HEAD(&iwarp_info->mpa_buf_list);
2747         for (i = 0; i < data.input.rx_num_desc; i++)
2748                 list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
2749                               &iwarp_info->mpa_buf_list);
2750         return rc;
2751 err:
2752         qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2753
2754         return rc;
2755 }
2756
2757 int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
2758                     struct qed_rdma_start_in_params *params)
2759 {
2760         struct qed_iwarp_info *iwarp_info;
2761         u32 rcv_wnd_size;
2762
2763         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2764
2765         iwarp_info->tcp_flags = QED_IWARP_TS_EN;
2766         rcv_wnd_size = QED_IWARP_RCV_WND_SIZE_DEF;
2767
2768         /* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
2769         iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
2770             ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
2771         iwarp_info->rcv_wnd_size = rcv_wnd_size >> iwarp_info->rcv_wnd_scale;
2772         iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
2773         iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
2774
2775         iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
2776
2777         iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
2778                                 MPA_RTR_TYPE_ZERO_WRITE |
2779                                 MPA_RTR_TYPE_ZERO_READ;
2780
2781         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
2782         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
2783         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);
2784
2785         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
2786                                   qed_iwarp_async_event);
2787         qed_ooo_setup(p_hwfn);
2788
2789         return qed_iwarp_ll2_start(p_hwfn, params, p_ptt);
2790 }
2791
2792 int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2793 {
2794         int rc;
2795
2796         qed_iwarp_free_prealloc_ep(p_hwfn);
2797         rc = qed_iwarp_wait_for_all_cids(p_hwfn);
2798         if (rc)
2799                 return rc;
2800
2801         qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_IWARP);
2802
2803         return qed_iwarp_ll2_stop(p_hwfn, p_ptt);
2804 }
2805
2806 static void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
2807                                   struct qed_iwarp_ep *ep,
2808                                   u8 fw_return_code)
2809 {
2810         struct qed_iwarp_cm_event_params params;
2811
2812         qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
2813
2814         params.event = QED_IWARP_EVENT_CLOSE;
2815         params.ep_context = ep;
2816         params.cm_info = &ep->cm_info;
2817         params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
2818                          0 : -ECONNRESET;
2819
2820         ep->state = QED_IWARP_EP_CLOSED;
2821         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2822         list_del(&ep->list_entry);
2823         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2824
2825         ep->event_cb(ep->cb_context, &params);
2826 }
2827
2828 static void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
2829                                          struct qed_iwarp_ep *ep,
2830                                          int fw_ret_code)
2831 {
2832         struct qed_iwarp_cm_event_params params;
2833         bool event_cb = false;
2834
2835         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
2836                    ep->cid, fw_ret_code);
2837
2838         switch (fw_ret_code) {
2839         case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
2840                 params.status = 0;
2841                 params.event = QED_IWARP_EVENT_DISCONNECT;
2842                 event_cb = true;
2843                 break;
2844         case IWARP_EXCEPTION_DETECTED_LLP_RESET:
2845                 params.status = -ECONNRESET;
2846                 params.event = QED_IWARP_EVENT_DISCONNECT;
2847                 event_cb = true;
2848                 break;
2849         case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
2850                 params.event = QED_IWARP_EVENT_RQ_EMPTY;
2851                 event_cb = true;
2852                 break;
2853         case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
2854                 params.event = QED_IWARP_EVENT_IRQ_FULL;
2855                 event_cb = true;
2856                 break;
2857         case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
2858                 params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
2859                 event_cb = true;
2860                 break;
2861         case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
2862                 params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
2863                 event_cb = true;
2864                 break;
2865         case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
2866                 params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
2867                 event_cb = true;
2868                 break;
2869         case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
2870                 params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
2871                 event_cb = true;
2872                 break;
2873         case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
2874                 params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
2875                 event_cb = true;
2876                 break;
2877         case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
2878                 params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
2879                 event_cb = true;
2880                 break;
2881         case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
2882                 params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
2883                 event_cb = true;
2884                 break;
2885         default:
2886                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2887                            "Unhandled exception received...fw_ret_code=%d\n",
2888                            fw_ret_code);
2889                 break;
2890         }
2891
2892         if (event_cb) {
2893                 params.ep_context = ep;
2894                 params.cm_info = &ep->cm_info;
2895                 ep->event_cb(ep->cb_context, &params);
2896         }
2897 }
2898
2899 static void
2900 qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
2901                                    struct qed_iwarp_ep *ep, u8 fw_return_code)
2902 {
2903         struct qed_iwarp_cm_event_params params;
2904
2905         memset(&params, 0, sizeof(params));
2906         params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
2907         params.ep_context = ep;
2908         params.cm_info = &ep->cm_info;
2909         ep->state = QED_IWARP_EP_CLOSED;
2910
2911         switch (fw_return_code) {
2912         case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
2913                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2914                            "%s(0x%x) TCP connect got invalid packet\n",
2915                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2916                 params.status = -ECONNRESET;
2917                 break;
2918         case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
2919                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2920                            "%s(0x%x) TCP Connection Reset\n",
2921                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2922                 params.status = -ECONNRESET;
2923                 break;
2924         case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
2925                 DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
2926                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2927                 params.status = -EBUSY;
2928                 break;
2929         case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
2930                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
2931                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2932                 params.status = -ECONNREFUSED;
2933                 break;
2934         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
2935                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
2936                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2937                 params.status = -ECONNRESET;
2938                 break;
2939         default:
2940                 DP_ERR(p_hwfn,
2941                        "%s(0x%x) Unexpected return code tcp connect: %d\n",
2942                        QED_IWARP_CONNECT_MODE_STRING(ep),
2943                        ep->tcp_cid, fw_return_code);
2944                 params.status = -ECONNRESET;
2945                 break;
2946         }
2947
2948         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2949                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
2950                 qed_iwarp_return_ep(p_hwfn, ep);
2951         } else {
2952                 ep->event_cb(ep->cb_context, &params);
2953                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2954                 list_del(&ep->list_entry);
2955                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2956         }
2957 }
2958
2959 static void
2960 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
2961                            struct qed_iwarp_ep *ep, u8 fw_return_code)
2962 {
2963         u8 ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2964
2965         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
2966                 /* Done with the SYN packet, post back to ll2 rx */
2967                 qed_iwarp_ll2_post_rx(p_hwfn, ep->syn, ll2_syn_handle);
2968
2969                 ep->syn = NULL;
2970
2971                 /* If connect failed - upper layer doesn't know about it */
2972                 if (fw_return_code == RDMA_RETURN_OK)
2973                         qed_iwarp_mpa_received(p_hwfn, ep);
2974                 else
2975                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2976                                                            fw_return_code);
2977         } else {
2978                 if (fw_return_code == RDMA_RETURN_OK)
2979                         qed_iwarp_mpa_offload(p_hwfn, ep);
2980                 else
2981                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
2982                                                            fw_return_code);
2983         }
2984 }
2985
2986 static inline bool
2987 qed_iwarp_check_ep_ok(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
2988 {
2989         if (!ep || (ep->sig != QED_EP_SIG)) {
2990                 DP_ERR(p_hwfn, "ERROR ON ASYNC ep=%p\n", ep);
2991                 return false;
2992         }
2993
2994         return true;
2995 }
2996
2997 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
2998                                  u8 fw_event_code, u16 echo,
2999                                  union event_ring_data *data,
3000                                  u8 fw_return_code)
3001 {
3002         struct qed_rdma_events events = p_hwfn->p_rdma_info->events;
3003         struct regpair *fw_handle = &data->rdma_data.async_handle;
3004         struct qed_iwarp_ep *ep = NULL;
3005         u16 srq_offset;
3006         u16 srq_id;
3007         u16 cid;
3008
3009         ep = (struct qed_iwarp_ep *)(uintptr_t)HILO_64(fw_handle->hi,
3010                                                        fw_handle->lo);
3011
3012         switch (fw_event_code) {
3013         case IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE:
3014                 /* Async completion after TCP 3-way handshake */
3015                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3016                         return -EINVAL;
3017                 DP_VERBOSE(p_hwfn,
3018                            QED_MSG_RDMA,
3019                            "EP(0x%x) IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE fw_ret_code=%d\n",
3020                            ep->tcp_cid, fw_return_code);
3021                 qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
3022                 break;
3023         case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
3024                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3025                         return -EINVAL;
3026                 DP_VERBOSE(p_hwfn,
3027                            QED_MSG_RDMA,
3028                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
3029                            ep->cid, fw_return_code);
3030                 qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
3031                 break;
3032         case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
3033                 /* Async completion for Close Connection ramrod */
3034                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3035                         return -EINVAL;
3036                 DP_VERBOSE(p_hwfn,
3037                            QED_MSG_RDMA,
3038                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
3039                            ep->cid, fw_return_code);
3040                 qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
3041                 break;
3042         case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
3043                 /* Async event for active side only */
3044                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3045                         return -EINVAL;
3046                 DP_VERBOSE(p_hwfn,
3047                            QED_MSG_RDMA,
3048                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_MPA_REPLY_ARRIVED fw_ret_code=%d\n",
3049                            ep->cid, fw_return_code);
3050                 qed_iwarp_mpa_reply_arrived(p_hwfn, ep);
3051                 break;
3052         case IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE:
3053                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3054                         return -EINVAL;
3055                 DP_VERBOSE(p_hwfn,
3056                            QED_MSG_RDMA,
3057                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE fw_ret_code=%d\n",
3058                            ep->cid, fw_return_code);
3059                 qed_iwarp_mpa_complete(p_hwfn, ep, fw_return_code);
3060                 break;
3061         case IWARP_EVENT_TYPE_ASYNC_CID_CLEANED:
3062                 cid = (u16)le32_to_cpu(fw_handle->lo);
3063                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
3064                            "(0x%x)IWARP_EVENT_TYPE_ASYNC_CID_CLEANED\n", cid);
3065                 qed_iwarp_cid_cleaned(p_hwfn, cid);
3066
3067                 break;
3068         case IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY:
3069                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY\n");
3070                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3071                 /* FW assigns value that is no greater than u16 */
3072                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3073                 events.affiliated_event(events.context,
3074                                         QED_IWARP_EVENT_SRQ_EMPTY,
3075                                         &srq_id);
3076                 break;
3077         case IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT:
3078                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT\n");
3079                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3080                 /* FW assigns value that is no greater than u16 */
3081                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3082                 events.affiliated_event(events.context,
3083                                         QED_IWARP_EVENT_SRQ_LIMIT,
3084                                         &srq_id);
3085                 break;
3086         case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
3087                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
3088
3089                 p_hwfn->p_rdma_info->events.affiliated_event(
3090                         p_hwfn->p_rdma_info->events.context,
3091                         QED_IWARP_EVENT_CQ_OVERFLOW,
3092                         (void *)fw_handle);
3093                 break;
3094         default:
3095                 DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
3096                        fw_event_code);
3097                 return -EINVAL;
3098         }
3099         return 0;
3100 }
3101
3102 int
3103 qed_iwarp_create_listen(void *rdma_cxt,
3104                         struct qed_iwarp_listen_in *iparams,
3105                         struct qed_iwarp_listen_out *oparams)
3106 {
3107         struct qed_hwfn *p_hwfn = rdma_cxt;
3108         struct qed_iwarp_listener *listener;
3109
3110         listener = kzalloc(sizeof(*listener), GFP_KERNEL);
3111         if (!listener)
3112                 return -ENOMEM;
3113
3114         listener->ip_version = iparams->ip_version;
3115         memcpy(listener->ip_addr, iparams->ip_addr, sizeof(listener->ip_addr));
3116         listener->port = iparams->port;
3117         listener->vlan = iparams->vlan;
3118
3119         listener->event_cb = iparams->event_cb;
3120         listener->cb_context = iparams->cb_context;
3121         listener->max_backlog = iparams->max_backlog;
3122         oparams->handle = listener;
3123
3124         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3125         list_add_tail(&listener->list_entry,
3126                       &p_hwfn->p_rdma_info->iwarp.listen_list);
3127         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3128
3129         DP_VERBOSE(p_hwfn,
3130                    QED_MSG_RDMA,
3131                    "callback=%p handle=%p ip=%x:%x:%x:%x port=0x%x vlan=0x%x\n",
3132                    listener->event_cb,
3133                    listener,
3134                    listener->ip_addr[0],
3135                    listener->ip_addr[1],
3136                    listener->ip_addr[2],
3137                    listener->ip_addr[3], listener->port, listener->vlan);
3138
3139         return 0;
3140 }
3141
3142 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle)
3143 {
3144         struct qed_iwarp_listener *listener = handle;
3145         struct qed_hwfn *p_hwfn = rdma_cxt;
3146
3147         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "handle=%p\n", handle);
3148
3149         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3150         list_del(&listener->list_entry);
3151         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3152
3153         kfree(listener);
3154
3155         return 0;
3156 }
3157
3158 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams)
3159 {
3160         struct qed_hwfn *p_hwfn = rdma_cxt;
3161         struct qed_sp_init_data init_data;
3162         struct qed_spq_entry *p_ent;
3163         struct qed_iwarp_ep *ep;
3164         struct qed_rdma_qp *qp;
3165         int rc;
3166
3167         ep = iparams->ep_context;
3168         if (!ep) {
3169                 DP_ERR(p_hwfn, "Ep Context receive in send_rtr is NULL\n");
3170                 return -EINVAL;
3171         }
3172
3173         qp = ep->qp;
3174
3175         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
3176                    qp->icid, ep->tcp_cid);
3177
3178         memset(&init_data, 0, sizeof(init_data));
3179         init_data.cid = qp->icid;
3180         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
3181         init_data.comp_mode = QED_SPQ_MODE_CB;
3182
3183         rc = qed_sp_init_request(p_hwfn, &p_ent,
3184                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD_SEND_RTR,
3185                                  PROTOCOLID_IWARP, &init_data);
3186
3187         if (rc)
3188                 return rc;
3189
3190         rc = qed_spq_post(p_hwfn, p_ent, NULL);
3191
3192         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = 0x%x\n", rc);
3193
3194         return rc;
3195 }
3196
3197 void
3198 qed_iwarp_query_qp(struct qed_rdma_qp *qp,
3199                    struct qed_rdma_query_qp_out_params *out_params)
3200 {
3201         out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
3202 }