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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 /* QLogic qed NIC Driver
   3  * Copyright (c) 2015-2017  QLogic Corporation
   4  * Copyright (c) 2019-2020 Marvell International Ltd.
   5  */
   6
   7 #include <linux/if_ether.h>
   8 #include <linux/if_vlan.h>
   9 #include <linux/ip.h>
  10 #include <linux/ipv6.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/tcp.h>
  13 #include "qed_cxt.h"
  14 #include "qed_hw.h"
  15 #include "qed_ll2.h"
  16 #include "qed_rdma.h"
  17 #include "qed_reg_addr.h"
  18 #include "qed_sp.h"
  19 #include "qed_ooo.h"
  20
  21 #define QED_IWARP_ORD_DEFAULT           32
  22 #define QED_IWARP_IRD_DEFAULT           32
  23 #define QED_IWARP_MAX_FW_MSS            4120
  24
  25 #define QED_EP_SIG 0xecabcdef
  26
  27 struct mpa_v2_hdr {
  28         __be16 ird;
  29         __be16 ord;
  30 };
  31
  32 #define MPA_V2_PEER2PEER_MODEL  0x8000
  33 #define MPA_V2_SEND_RTR         0x4000  /* on ird */
  34 #define MPA_V2_READ_RTR         0x4000  /* on ord */
  35 #define MPA_V2_WRITE_RTR        0x8000
  36 #define MPA_V2_IRD_ORD_MASK     0x3FFF
  37
  38 #define MPA_REV2(_mpa_rev) ((_mpa_rev) == MPA_NEGOTIATION_TYPE_ENHANCED)
  39
  40 #define QED_IWARP_INVALID_TCP_CID       0xffffffff
  41
  42 #define QED_IWARP_RCV_WND_SIZE_DEF_BB_2P (200 * 1024)
  43 #define QED_IWARP_RCV_WND_SIZE_DEF_BB_4P (100 * 1024)
  44 #define QED_IWARP_RCV_WND_SIZE_DEF_AH_2P (150 * 1024)
  45 #define QED_IWARP_RCV_WND_SIZE_DEF_AH_4P (90 * 1024)
  46
  47 #define QED_IWARP_RCV_WND_SIZE_MIN      (0xffff)
  48 #define TIMESTAMP_HEADER_SIZE           (12)
  49 #define QED_IWARP_MAX_FIN_RT_DEFAULT    (2)
  50
  51 #define QED_IWARP_TS_EN                 BIT(0)
  52 #define QED_IWARP_DA_EN                 BIT(1)
  53 #define QED_IWARP_PARAM_CRC_NEEDED      (1)
  54 #define QED_IWARP_PARAM_P2P             (1)
  55
  56 #define QED_IWARP_DEF_MAX_RT_TIME       (0)
  57 #define QED_IWARP_DEF_CWND_FACTOR       (4)
  58 #define QED_IWARP_DEF_KA_MAX_PROBE_CNT  (5)
  59 #define QED_IWARP_DEF_KA_TIMEOUT        (1200000)       /* 20 min */
  60 #define QED_IWARP_DEF_KA_INTERVAL       (1000)          /* 1 sec */
  61
  62 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
  63                                  __le16 echo, union event_ring_data *data,
  64                                  u8 fw_return_code);
  65
  66 /* Override devinfo with iWARP specific values */
  67 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
  68 {
  69         struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;
  70
  71         dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
  72         dev->max_qp = min_t(u32,
  73                             IWARP_MAX_QPS,
  74                             p_hwfn->p_rdma_info->num_qps) -
  75                       QED_IWARP_PREALLOC_CNT;
  76
  77         dev->max_cq = dev->max_qp;
  78
  79         dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
  80         dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
  81 }
  82
  83 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
  84 {
  85         p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
  86         qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
  87         p_hwfn->b_rdma_enabled_in_prs = true;
  88 }
  89
  90 /* We have two cid maps, one for tcp which should be used only from passive
  91  * syn processing and replacing a pre-allocated ep in the list. The second
  92  * for active tcp and for QPs.
  93  */
  94 static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
  95 {
  96         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
  97
  98         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
  99
 100         if (cid < QED_IWARP_PREALLOC_CNT)
 101                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
 102                                     cid);
 103         else
 104                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 105
 106         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 107 }
 108
 109 void
 110 qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
 111                          struct iwarp_init_func_ramrod_data *p_ramrod)
 112 {
 113         p_ramrod->iwarp.ll2_ooo_q_index =
 114             RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +
 115             p_hwfn->p_rdma_info->iwarp.ll2_ooo_handle;
 116
 117         p_ramrod->tcp.tx_sws_timer = cpu_to_le16(QED_TX_SWS_TIMER_DFLT);
 118         p_ramrod->tcp.two_msl_timer = cpu_to_le32(QED_TWO_MSL_TIMER_DFLT);
 119         p_ramrod->tcp.max_fin_rt = QED_IWARP_MAX_FIN_RT_DEFAULT;
 120
 121         return;
 122 }
 123
 124 static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 125 {
 126         int rc;
 127
 128         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 129         rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
 130         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 131         if (rc) {
 132                 DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
 133                 return rc;
 134         }
 135         *cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 136
 137         rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
 138         if (rc)
 139                 qed_iwarp_cid_cleaned(p_hwfn, *cid);
 140
 141         return rc;
 142 }
 143
 144 static void qed_iwarp_set_tcp_cid(struct qed_hwfn *p_hwfn, u32 cid)
 145 {
 146         cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
 147
 148         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 149         qed_bmap_set_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 150         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 151 }
 152
 153 /* This function allocates a cid for passive tcp (called from syn receive)
 154  * the reason it's separate from the regular cid allocation is because it
 155  * is assured that these cids already have ilt allocated. They are preallocated
 156  * to ensure that we won't need to allocate memory during syn processing
 157  */
 158 static int qed_iwarp_alloc_tcp_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 159 {
 160         int rc;
 161
 162         spin_lock_bh(&p_hwfn->p_rdma_info->lock);
 163
 164         rc = qed_rdma_bmap_alloc_id(p_hwfn,
 165                                     &p_hwfn->p_rdma_info->tcp_cid_map, cid);
 166
 167         spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 168
 169         if (rc) {
 170                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 171                            "can't allocate iwarp tcp cid max-count=%d\n",
 172                            p_hwfn->p_rdma_info->tcp_cid_map.max_count);
 173
 174                 *cid = QED_IWARP_INVALID_TCP_CID;
 175                 return rc;
 176         }
 177
 178         *cid += qed_cxt_get_proto_cid_start(p_hwfn,
 179                                             p_hwfn->p_rdma_info->proto);
 180         return 0;
 181 }
 182
 183 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
 184                         struct qed_rdma_qp *qp,
 185                         struct qed_rdma_create_qp_out_params *out_params)
 186 {
 187         struct iwarp_create_qp_ramrod_data *p_ramrod;
 188         struct qed_sp_init_data init_data;
 189         struct qed_spq_entry *p_ent;
 190         u16 physical_queue;
 191         u32 cid;
 192         int rc;
 193
 194         qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 195                                               IWARP_SHARED_QUEUE_PAGE_SIZE,
 196                                               &qp->shared_queue_phys_addr,
 197                                               GFP_KERNEL);
 198         if (!qp->shared_queue)
 199                 return -ENOMEM;
 200
 201         out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
 202             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 203         out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
 204             IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
 205         out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
 206             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 207         out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
 208             IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
 209
 210         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
 211         if (rc)
 212                 goto err1;
 213
 214         qp->icid = (u16)cid;
 215
 216         memset(&init_data, 0, sizeof(init_data));
 217         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 218         init_data.cid = qp->icid;
 219         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 220
 221         rc = qed_sp_init_request(p_hwfn, &p_ent,
 222                                  IWARP_RAMROD_CMD_ID_CREATE_QP,
 223                                  PROTOCOLID_IWARP, &init_data);
 224         if (rc)
 225                 goto err2;
 226
 227         p_ramrod = &p_ent->ramrod.iwarp_create_qp;
 228
 229         SET_FIELD(p_ramrod->flags,
 230                   IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
 231                   qp->fmr_and_reserved_lkey);
 232
 233         SET_FIELD(p_ramrod->flags,
 234                   IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);
 235
 236         SET_FIELD(p_ramrod->flags,
 237                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
 238                   qp->incoming_rdma_read_en);
 239
 240         SET_FIELD(p_ramrod->flags,
 241                   IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
 242                   qp->incoming_rdma_write_en);
 243
 244         SET_FIELD(p_ramrod->flags,
 245                   IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
 246                   qp->incoming_atomic_en);
 247
 248         SET_FIELD(p_ramrod->flags,
 249                   IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);
 250
 251         p_ramrod->pd = cpu_to_le16(qp->pd);
 252         p_ramrod->sq_num_pages = cpu_to_le16(qp->sq_num_pages);
 253         p_ramrod->rq_num_pages = cpu_to_le16(qp->rq_num_pages);
 254
 255         p_ramrod->srq_id.srq_idx = cpu_to_le16(qp->srq_id);
 256         p_ramrod->srq_id.opaque_fid = cpu_to_le16(p_hwfn->hw_info.opaque_fid);
 257         p_ramrod->qp_handle_for_cqe.hi = qp->qp_handle.hi;
 258         p_ramrod->qp_handle_for_cqe.lo = qp->qp_handle.lo;
 259
 260         p_ramrod->cq_cid_for_sq =
 261             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
 262         p_ramrod->cq_cid_for_rq =
 263             cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);
 264
 265         p_ramrod->dpi = cpu_to_le16(qp->dpi);
 266
 267         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 268         p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
 269         physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 270         p_ramrod->physical_q1 = cpu_to_le16(physical_queue);
 271
 272         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 273         if (rc)
 274                 goto err2;
 275
 276         return rc;
 277
 278 err2:
 279         qed_iwarp_cid_cleaned(p_hwfn, cid);
 280 err1:
 281         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 282                           IWARP_SHARED_QUEUE_PAGE_SIZE,
 283                           qp->shared_queue, qp->shared_queue_phys_addr);
 284
 285         return rc;
 286 }
 287
 288 static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 289 {
 290         struct iwarp_modify_qp_ramrod_data *p_ramrod;
 291         struct qed_sp_init_data init_data;
 292         struct qed_spq_entry *p_ent;
 293         u16 flags, trans_to_state;
 294         int rc;
 295
 296         /* Get SPQ entry */
 297         memset(&init_data, 0, sizeof(init_data));
 298         init_data.cid = qp->icid;
 299         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 300         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 301
 302         rc = qed_sp_init_request(p_hwfn, &p_ent,
 303                                  IWARP_RAMROD_CMD_ID_MODIFY_QP,
 304                                  p_hwfn->p_rdma_info->proto, &init_data);
 305         if (rc)
 306                 return rc;
 307
 308         p_ramrod = &p_ent->ramrod.iwarp_modify_qp;
 309
 310         flags = le16_to_cpu(p_ramrod->flags);
 311         SET_FIELD(flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN, 0x1);
 312         p_ramrod->flags = cpu_to_le16(flags);
 313
 314         if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
 315                 trans_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
 316         else
 317                 trans_to_state = IWARP_MODIFY_QP_STATE_ERROR;
 318
 319         p_ramrod->transition_to_state = cpu_to_le16(trans_to_state);
 320
 321         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 322
 323         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);
 324
 325         return rc;
 326 }
 327
 328 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
 329 {
 330         switch (state) {
 331         case QED_ROCE_QP_STATE_RESET:
 332         case QED_ROCE_QP_STATE_INIT:
 333         case QED_ROCE_QP_STATE_RTR:
 334                 return QED_IWARP_QP_STATE_IDLE;
 335         case QED_ROCE_QP_STATE_RTS:
 336                 return QED_IWARP_QP_STATE_RTS;
 337         case QED_ROCE_QP_STATE_SQD:
 338                 return QED_IWARP_QP_STATE_CLOSING;
 339         case QED_ROCE_QP_STATE_ERR:
 340                 return QED_IWARP_QP_STATE_ERROR;
 341         case QED_ROCE_QP_STATE_SQE:
 342                 return QED_IWARP_QP_STATE_TERMINATE;
 343         default:
 344                 return QED_IWARP_QP_STATE_ERROR;
 345         }
 346 }
 347
 348 static enum qed_roce_qp_state
 349 qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
 350 {
 351         switch (state) {
 352         case QED_IWARP_QP_STATE_IDLE:
 353                 return QED_ROCE_QP_STATE_INIT;
 354         case QED_IWARP_QP_STATE_RTS:
 355                 return QED_ROCE_QP_STATE_RTS;
 356         case QED_IWARP_QP_STATE_TERMINATE:
 357                 return QED_ROCE_QP_STATE_SQE;
 358         case QED_IWARP_QP_STATE_CLOSING:
 359                 return QED_ROCE_QP_STATE_SQD;
 360         case QED_IWARP_QP_STATE_ERROR:
 361                 return QED_ROCE_QP_STATE_ERR;
 362         default:
 363                 return QED_ROCE_QP_STATE_ERR;
 364         }
 365 }
 366
 367 static const char * const iwarp_state_names[] = {
 368         "IDLE",
 369         "RTS",
 370         "TERMINATE",
 371         "CLOSING",
 372         "ERROR",
 373 };
 374
 375 int
 376 qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
 377                     struct qed_rdma_qp *qp,
 378                     enum qed_iwarp_qp_state new_state, bool internal)
 379 {
 380         enum qed_iwarp_qp_state prev_iw_state;
 381         bool modify_fw = false;
 382         int rc = 0;
 383
 384         /* modify QP can be called from upper-layer or as a result of async
 385          * RST/FIN... therefore need to protect
 386          */
 387         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 388         prev_iw_state = qp->iwarp_state;
 389
 390         if (prev_iw_state == new_state) {
 391                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 392                 return 0;
 393         }
 394
 395         switch (prev_iw_state) {
 396         case QED_IWARP_QP_STATE_IDLE:
 397                 switch (new_state) {
 398                 case QED_IWARP_QP_STATE_RTS:
 399                         qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
 400                         break;
 401                 case QED_IWARP_QP_STATE_ERROR:
 402                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 403                         if (!internal)
 404                                 modify_fw = true;
 405                         break;
 406                 default:
 407                         break;
 408                 }
 409                 break;
 410         case QED_IWARP_QP_STATE_RTS:
 411                 switch (new_state) {
 412                 case QED_IWARP_QP_STATE_CLOSING:
 413                         if (!internal)
 414                                 modify_fw = true;
 415
 416                         qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
 417                         break;
 418                 case QED_IWARP_QP_STATE_ERROR:
 419                         if (!internal)
 420                                 modify_fw = true;
 421                         qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
 422                         break;
 423                 default:
 424                         break;
 425                 }
 426                 break;
 427         case QED_IWARP_QP_STATE_ERROR:
 428                 switch (new_state) {
 429                 case QED_IWARP_QP_STATE_IDLE:
 430
 431                         qp->iwarp_state = new_state;
 432                         break;
 433                 case QED_IWARP_QP_STATE_CLOSING:
 434                         /* could happen due to race... do nothing.... */
 435                         break;
 436                 default:
 437                         rc = -EINVAL;
 438                 }
 439                 break;
 440         case QED_IWARP_QP_STATE_TERMINATE:
 441         case QED_IWARP_QP_STATE_CLOSING:
 442                 qp->iwarp_state = new_state;
 443                 break;
 444         default:
 445                 break;
 446         }
 447
 448         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
 449                    qp->icid,
 450                    iwarp_state_names[prev_iw_state],
 451                    iwarp_state_names[qp->iwarp_state],
 452                    internal ? "internal" : "");
 453
 454         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
 455
 456         if (modify_fw)
 457                 rc = qed_iwarp_modify_fw(p_hwfn, qp);
 458
 459         return rc;
 460 }
 461
 462 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 463 {
 464         struct qed_sp_init_data init_data;
 465         struct qed_spq_entry *p_ent;
 466         int rc;
 467
 468         /* Get SPQ entry */
 469         memset(&init_data, 0, sizeof(init_data));
 470         init_data.cid = qp->icid;
 471         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 472         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 473
 474         rc = qed_sp_init_request(p_hwfn, &p_ent,
 475                                  IWARP_RAMROD_CMD_ID_DESTROY_QP,
 476                                  p_hwfn->p_rdma_info->proto, &init_data);
 477         if (rc)
 478                 return rc;
 479
 480         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 481
 482         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);
 483
 484         return rc;
 485 }
 486
 487 static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
 488                                  struct qed_iwarp_ep *ep,
 489                                  bool remove_from_active_list)
 490 {
 491         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 492                           sizeof(*ep->ep_buffer_virt),
 493                           ep->ep_buffer_virt, ep->ep_buffer_phys);
 494
 495         if (remove_from_active_list) {
 496                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 497                 list_del(&ep->list_entry);
 498                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 499         }
 500
 501         if (ep->qp)
 502                 ep->qp->ep = NULL;
 503
 504         kfree(ep);
 505 }
 506
 507 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
 508 {
 509         struct qed_iwarp_ep *ep = qp->ep;
 510         int wait_count = 0;
 511         int rc = 0;
 512
 513         if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
 514                 rc = qed_iwarp_modify_qp(p_hwfn, qp,
 515                                          QED_IWARP_QP_STATE_ERROR, false);
 516                 if (rc)
 517                         return rc;
 518         }
 519
 520         /* Make sure ep is closed before returning and freeing memory. */
 521         if (ep) {
 522                 while (READ_ONCE(ep->state) != QED_IWARP_EP_CLOSED &&
 523                        wait_count++ < 200)
 524                         msleep(100);
 525
 526                 if (ep->state != QED_IWARP_EP_CLOSED)
 527                         DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
 528                                   ep->state);
 529
 530                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
 531         }
 532
 533         rc = qed_iwarp_fw_destroy(p_hwfn, qp);
 534
 535         if (qp->shared_queue)
 536                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 537                                   IWARP_SHARED_QUEUE_PAGE_SIZE,
 538                                   qp->shared_queue, qp->shared_queue_phys_addr);
 539
 540         return rc;
 541 }
 542
 543 static int
 544 qed_iwarp_create_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep **ep_out)
 545 {
 546         struct qed_iwarp_ep *ep;
 547         int rc;
 548
 549         ep = kzalloc(sizeof(*ep), GFP_KERNEL);
 550         if (!ep)
 551                 return -ENOMEM;
 552
 553         ep->state = QED_IWARP_EP_INIT;
 554
 555         ep->ep_buffer_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 556                                                 sizeof(*ep->ep_buffer_virt),
 557                                                 &ep->ep_buffer_phys,
 558                                                 GFP_KERNEL);
 559         if (!ep->ep_buffer_virt) {
 560                 rc = -ENOMEM;
 561                 goto err;
 562         }
 563
 564         ep->sig = QED_EP_SIG;
 565
 566         *ep_out = ep;
 567
 568         return 0;
 569
 570 err:
 571         kfree(ep);
 572         return rc;
 573 }
 574
 575 static void
 576 qed_iwarp_print_tcp_ramrod(struct qed_hwfn *p_hwfn,
 577                            struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod)
 578 {
 579         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "local_mac=%x %x %x, remote_mac=%x %x %x\n",
 580                    p_tcp_ramrod->tcp.local_mac_addr_lo,
 581                    p_tcp_ramrod->tcp.local_mac_addr_mid,
 582                    p_tcp_ramrod->tcp.local_mac_addr_hi,
 583                    p_tcp_ramrod->tcp.remote_mac_addr_lo,
 584                    p_tcp_ramrod->tcp.remote_mac_addr_mid,
 585                    p_tcp_ramrod->tcp.remote_mac_addr_hi);
 586
 587         if (p_tcp_ramrod->tcp.ip_version == TCP_IPV4) {
 588                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 589                            "local_ip=%pI4h:%x, remote_ip=%pI4h:%x, vlan=%x\n",
 590                            p_tcp_ramrod->tcp.local_ip,
 591                            p_tcp_ramrod->tcp.local_port,
 592                            p_tcp_ramrod->tcp.remote_ip,
 593                            p_tcp_ramrod->tcp.remote_port,
 594                            p_tcp_ramrod->tcp.vlan_id);
 595         } else {
 596                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 597                            "local_ip=%pI6:%x, remote_ip=%pI6:%x, vlan=%x\n",
 598                            p_tcp_ramrod->tcp.local_ip,
 599                            p_tcp_ramrod->tcp.local_port,
 600                            p_tcp_ramrod->tcp.remote_ip,
 601                            p_tcp_ramrod->tcp.remote_port,
 602                            p_tcp_ramrod->tcp.vlan_id);
 603         }
 604
 605         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 606                    "flow_label=%x, ttl=%x, tos_or_tc=%x, mss=%x, rcv_wnd_scale=%x, connect_mode=%x, flags=%x\n",
 607                    p_tcp_ramrod->tcp.flow_label,
 608                    p_tcp_ramrod->tcp.ttl,
 609                    p_tcp_ramrod->tcp.tos_or_tc,
 610                    p_tcp_ramrod->tcp.mss,
 611                    p_tcp_ramrod->tcp.rcv_wnd_scale,
 612                    p_tcp_ramrod->tcp.connect_mode,
 613                    p_tcp_ramrod->tcp.flags);
 614
 615         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "syn_ip_payload_length=%x, lo=%x, hi=%x\n",
 616                    p_tcp_ramrod->tcp.syn_ip_payload_length,
 617                    p_tcp_ramrod->tcp.syn_phy_addr_lo,
 618                    p_tcp_ramrod->tcp.syn_phy_addr_hi);
 619 }
 620
 621 static int
 622 qed_iwarp_tcp_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 623 {
 624         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 625         struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod;
 626         struct tcp_offload_params_opt2 *tcp;
 627         struct qed_sp_init_data init_data;
 628         struct qed_spq_entry *p_ent;
 629         dma_addr_t async_output_phys;
 630         dma_addr_t in_pdata_phys;
 631         u16 physical_q;
 632         u16 flags = 0;
 633         u8 tcp_flags;
 634         int rc;
 635         int i;
 636
 637         memset(&init_data, 0, sizeof(init_data));
 638         init_data.cid = ep->tcp_cid;
 639         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 640         if (ep->connect_mode == TCP_CONNECT_PASSIVE)
 641                 init_data.comp_mode = QED_SPQ_MODE_CB;
 642         else
 643                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 644
 645         rc = qed_sp_init_request(p_hwfn, &p_ent,
 646                                  IWARP_RAMROD_CMD_ID_TCP_OFFLOAD,
 647                                  PROTOCOLID_IWARP, &init_data);
 648         if (rc)
 649                 return rc;
 650
 651         p_tcp_ramrod = &p_ent->ramrod.iwarp_tcp_offload;
 652
 653         in_pdata_phys = ep->ep_buffer_phys +
 654                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 655         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.incoming_ulp_buffer.addr,
 656                        in_pdata_phys);
 657
 658         p_tcp_ramrod->iwarp.incoming_ulp_buffer.len =
 659             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 660
 661         async_output_phys = ep->ep_buffer_phys +
 662                             offsetof(struct qed_iwarp_ep_memory, async_output);
 663         DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.async_eqe_output_buf,
 664                        async_output_phys);
 665
 666         p_tcp_ramrod->iwarp.handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 667         p_tcp_ramrod->iwarp.handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 668
 669         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 670         p_tcp_ramrod->iwarp.physical_q0 = cpu_to_le16(physical_q);
 671         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 672         p_tcp_ramrod->iwarp.physical_q1 = cpu_to_le16(physical_q);
 673         p_tcp_ramrod->iwarp.mpa_mode = iwarp_info->mpa_rev;
 674
 675         tcp = &p_tcp_ramrod->tcp;
 676         qed_set_fw_mac_addr(&tcp->remote_mac_addr_hi,
 677                             &tcp->remote_mac_addr_mid,
 678                             &tcp->remote_mac_addr_lo, ep->remote_mac_addr);
 679         qed_set_fw_mac_addr(&tcp->local_mac_addr_hi, &tcp->local_mac_addr_mid,
 680                             &tcp->local_mac_addr_lo, ep->local_mac_addr);
 681
 682         tcp->vlan_id = cpu_to_le16(ep->cm_info.vlan);
 683
 684         tcp_flags = p_hwfn->p_rdma_info->iwarp.tcp_flags;
 685
 686         SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN,
 687                   !!(tcp_flags & QED_IWARP_TS_EN));
 688
 689         SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN,
 690                   !!(tcp_flags & QED_IWARP_DA_EN));
 691
 692         tcp->flags = cpu_to_le16(flags);
 693         tcp->ip_version = ep->cm_info.ip_version;
 694
 695         for (i = 0; i < 4; i++) {
 696                 tcp->remote_ip[i] = cpu_to_le32(ep->cm_info.remote_ip[i]);
 697                 tcp->local_ip[i] = cpu_to_le32(ep->cm_info.local_ip[i]);
 698         }
 699
 700         tcp->remote_port = cpu_to_le16(ep->cm_info.remote_port);
 701         tcp->local_port = cpu_to_le16(ep->cm_info.local_port);
 702         tcp->mss = cpu_to_le16(ep->mss);
 703         tcp->flow_label = 0;
 704         tcp->ttl = 0x40;
 705         tcp->tos_or_tc = 0;
 706
 707         tcp->max_rt_time = QED_IWARP_DEF_MAX_RT_TIME;
 708         tcp->cwnd = cpu_to_le32(QED_IWARP_DEF_CWND_FACTOR * ep->mss);
 709         tcp->ka_max_probe_cnt = QED_IWARP_DEF_KA_MAX_PROBE_CNT;
 710         tcp->ka_timeout = cpu_to_le32(QED_IWARP_DEF_KA_TIMEOUT);
 711         tcp->ka_interval = cpu_to_le32(QED_IWARP_DEF_KA_INTERVAL);
 712
 713         tcp->rcv_wnd_scale = (u8)p_hwfn->p_rdma_info->iwarp.rcv_wnd_scale;
 714         tcp->connect_mode = ep->connect_mode;
 715
 716         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 717                 tcp->syn_ip_payload_length =
 718                         cpu_to_le16(ep->syn_ip_payload_length);
 719                 tcp->syn_phy_addr_hi = DMA_HI_LE(ep->syn_phy_addr);
 720                 tcp->syn_phy_addr_lo = DMA_LO_LE(ep->syn_phy_addr);
 721         }
 722
 723         qed_iwarp_print_tcp_ramrod(p_hwfn, p_tcp_ramrod);
 724
 725         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 726
 727         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 728                    "EP(0x%x) Offload completed rc=%d\n", ep->tcp_cid, rc);
 729
 730         return rc;
 731 }
 732
 733 static void
 734 qed_iwarp_mpa_received(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 735 {
 736         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 737         struct qed_iwarp_cm_event_params params;
 738         struct mpa_v2_hdr *mpa_v2;
 739         union async_output *async_data;
 740         u16 mpa_ord, mpa_ird;
 741         u8 mpa_hdr_size = 0;
 742         u16 ulp_data_len;
 743         u8 mpa_rev;
 744
 745         async_data = &ep->ep_buffer_virt->async_output;
 746
 747         mpa_rev = async_data->mpa_request.mpa_handshake_mode;
 748         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 749                    "private_data_len=%x handshake_mode=%x private_data=(%x)\n",
 750                    async_data->mpa_request.ulp_data_len,
 751                    mpa_rev, *((u32 *)(ep->ep_buffer_virt->in_pdata)));
 752
 753         if (mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
 754                 /* Read ord/ird values from private data buffer */
 755                 mpa_v2 = (struct mpa_v2_hdr *)ep->ep_buffer_virt->in_pdata;
 756                 mpa_hdr_size = sizeof(*mpa_v2);
 757
 758                 mpa_ord = ntohs(mpa_v2->ord);
 759                 mpa_ird = ntohs(mpa_v2->ird);
 760
 761                 /* Temprary store in cm_info incoming ord/ird requested, later
 762                  * replace with negotiated value during accept
 763                  */
 764                 ep->cm_info.ord = (u8)min_t(u16,
 765                                             (mpa_ord & MPA_V2_IRD_ORD_MASK),
 766                                             QED_IWARP_ORD_DEFAULT);
 767
 768                 ep->cm_info.ird = (u8)min_t(u16,
 769                                             (mpa_ird & MPA_V2_IRD_ORD_MASK),
 770                                             QED_IWARP_IRD_DEFAULT);
 771
 772                 /* Peer2Peer negotiation */
 773                 ep->rtr_type = MPA_RTR_TYPE_NONE;
 774                 if (mpa_ird & MPA_V2_PEER2PEER_MODEL) {
 775                         if (mpa_ord & MPA_V2_WRITE_RTR)
 776                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_WRITE;
 777
 778                         if (mpa_ord & MPA_V2_READ_RTR)
 779                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_READ;
 780
 781                         if (mpa_ird & MPA_V2_SEND_RTR)
 782                                 ep->rtr_type |= MPA_RTR_TYPE_ZERO_SEND;
 783
 784                         ep->rtr_type &= iwarp_info->rtr_type;
 785
 786                         /* if we're left with no match send our capabilities */
 787                         if (ep->rtr_type == MPA_RTR_TYPE_NONE)
 788                                 ep->rtr_type = iwarp_info->rtr_type;
 789                 }
 790
 791                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
 792         } else {
 793                 ep->cm_info.ord = QED_IWARP_ORD_DEFAULT;
 794                 ep->cm_info.ird = QED_IWARP_IRD_DEFAULT;
 795                 ep->mpa_rev = MPA_NEGOTIATION_TYPE_BASIC;
 796         }
 797
 798         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 799                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x rtr:0x%x ulp_data_len = %x mpa_hdr_size = %x\n",
 800                    mpa_rev, ep->cm_info.ord, ep->cm_info.ird, ep->rtr_type,
 801                    async_data->mpa_request.ulp_data_len, mpa_hdr_size);
 802
 803         /* Strip mpa v2 hdr from private data before sending to upper layer */
 804         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_hdr_size;
 805
 806         ulp_data_len = le16_to_cpu(async_data->mpa_request.ulp_data_len);
 807         ep->cm_info.private_data_len = ulp_data_len - mpa_hdr_size;
 808
 809         params.event = QED_IWARP_EVENT_MPA_REQUEST;
 810         params.cm_info = &ep->cm_info;
 811         params.ep_context = ep;
 812         params.status = 0;
 813
 814         ep->state = QED_IWARP_EP_MPA_REQ_RCVD;
 815         ep->event_cb(ep->cb_context, &params);
 816 }
 817
 818 static int
 819 qed_iwarp_mpa_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 820 {
 821         struct iwarp_mpa_offload_ramrod_data *p_mpa_ramrod;
 822         struct mpa_outgoing_params *common;
 823         struct qed_iwarp_info *iwarp_info;
 824         struct qed_sp_init_data init_data;
 825         dma_addr_t async_output_phys;
 826         struct qed_spq_entry *p_ent;
 827         dma_addr_t out_pdata_phys;
 828         dma_addr_t in_pdata_phys;
 829         struct qed_rdma_qp *qp;
 830         bool reject;
 831         u32 val;
 832         int rc;
 833
 834         if (!ep)
 835                 return -EINVAL;
 836
 837         qp = ep->qp;
 838         reject = !qp;
 839
 840         memset(&init_data, 0, sizeof(init_data));
 841         init_data.cid = reject ? ep->tcp_cid : qp->icid;
 842         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 843
 844         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
 845                 init_data.comp_mode = QED_SPQ_MODE_CB;
 846         else
 847                 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 848
 849         rc = qed_sp_init_request(p_hwfn, &p_ent,
 850                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD,
 851                                  PROTOCOLID_IWARP, &init_data);
 852         if (rc)
 853                 return rc;
 854
 855         p_mpa_ramrod = &p_ent->ramrod.iwarp_mpa_offload;
 856         common = &p_mpa_ramrod->common;
 857
 858         out_pdata_phys = ep->ep_buffer_phys +
 859                          offsetof(struct qed_iwarp_ep_memory, out_pdata);
 860         DMA_REGPAIR_LE(common->outgoing_ulp_buffer.addr, out_pdata_phys);
 861
 862         val = ep->cm_info.private_data_len;
 863         common->outgoing_ulp_buffer.len = cpu_to_le16(val);
 864         common->crc_needed = p_hwfn->p_rdma_info->iwarp.crc_needed;
 865
 866         common->out_rq.ord = cpu_to_le32(ep->cm_info.ord);
 867         common->out_rq.ird = cpu_to_le32(ep->cm_info.ird);
 868
 869         val = p_hwfn->hw_info.opaque_fid << 16 | ep->tcp_cid;
 870         p_mpa_ramrod->tcp_cid = cpu_to_le32(val);
 871
 872         in_pdata_phys = ep->ep_buffer_phys +
 873                         offsetof(struct qed_iwarp_ep_memory, in_pdata);
 874         p_mpa_ramrod->tcp_connect_side = ep->connect_mode;
 875         DMA_REGPAIR_LE(p_mpa_ramrod->incoming_ulp_buffer.addr,
 876                        in_pdata_phys);
 877         p_mpa_ramrod->incoming_ulp_buffer.len =
 878             cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
 879         async_output_phys = ep->ep_buffer_phys +
 880                             offsetof(struct qed_iwarp_ep_memory, async_output);
 881         DMA_REGPAIR_LE(p_mpa_ramrod->async_eqe_output_buf,
 882                        async_output_phys);
 883         p_mpa_ramrod->handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
 884         p_mpa_ramrod->handle_for_async.lo = cpu_to_le32(PTR_LO(ep));
 885
 886         if (!reject) {
 887                 DMA_REGPAIR_LE(p_mpa_ramrod->shared_queue_addr,
 888                                qp->shared_queue_phys_addr);
 889                 p_mpa_ramrod->stats_counter_id =
 890                     RESC_START(p_hwfn, QED_RDMA_STATS_QUEUE) + qp->stats_queue;
 891         } else {
 892                 common->reject = 1;
 893         }
 894
 895         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 896         p_mpa_ramrod->rcv_wnd = cpu_to_le16(iwarp_info->rcv_wnd_size);
 897         p_mpa_ramrod->mode = ep->mpa_rev;
 898         SET_FIELD(p_mpa_ramrod->rtr_pref,
 899                   IWARP_MPA_OFFLOAD_RAMROD_DATA_RTR_SUPPORTED, ep->rtr_type);
 900
 901         ep->state = QED_IWARP_EP_MPA_OFFLOADED;
 902         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 903         if (!reject)
 904                 ep->cid = qp->icid;     /* Now they're migrated. */
 905
 906         DP_VERBOSE(p_hwfn,
 907                    QED_MSG_RDMA,
 908                    "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",
 909                    reject ? 0xffff : qp->icid,
 910                    ep->tcp_cid,
 911                    rc,
 912                    ep->cm_info.ird,
 913                    ep->cm_info.ord, ep->rtr_type, ep->mpa_rev, reject);
 914         return rc;
 915 }
 916
 917 static void
 918 qed_iwarp_return_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 919 {
 920         ep->state = QED_IWARP_EP_INIT;
 921         if (ep->qp)
 922                 ep->qp->ep = NULL;
 923         ep->qp = NULL;
 924         memset(&ep->cm_info, 0, sizeof(ep->cm_info));
 925
 926         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
 927                 /* We don't care about the return code, it's ok if tcp_cid
 928                  * remains invalid...in this case we'll defer allocation
 929                  */
 930                 qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
 931         }
 932         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 933
 934         list_move_tail(&ep->list_entry,
 935                        &p_hwfn->p_rdma_info->iwarp.ep_free_list);
 936
 937         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
 938 }
 939
 940 static void
 941 qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 942 {
 943         struct mpa_v2_hdr *mpa_v2_params;
 944         union async_output *async_data;
 945         u16 mpa_ird, mpa_ord;
 946         u8 mpa_data_size = 0;
 947         u16 ulp_data_len;
 948
 949         if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
 950                 mpa_v2_params =
 951                         (struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
 952                 mpa_data_size = sizeof(*mpa_v2_params);
 953                 mpa_ird = ntohs(mpa_v2_params->ird);
 954                 mpa_ord = ntohs(mpa_v2_params->ord);
 955
 956                 ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
 957                 ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
 958         }
 959
 960         async_data = &ep->ep_buffer_virt->async_output;
 961         ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;
 962
 963         ulp_data_len = le16_to_cpu(async_data->mpa_response.ulp_data_len);
 964         ep->cm_info.private_data_len = ulp_data_len - mpa_data_size;
 965 }
 966
 967 static void
 968 qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
 969 {
 970         struct qed_iwarp_cm_event_params params;
 971
 972         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
 973                 DP_NOTICE(p_hwfn,
 974                           "MPA reply event not expected on passive side!\n");
 975                 return;
 976         }
 977
 978         params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;
 979
 980         qed_iwarp_parse_private_data(p_hwfn, ep);
 981
 982         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
 983                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
 984                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
 985
 986         params.cm_info = &ep->cm_info;
 987         params.ep_context = ep;
 988         params.status = 0;
 989
 990         ep->mpa_reply_processed = true;
 991
 992         ep->event_cb(ep->cb_context, &params);
 993 }
 994
 995 #define QED_IWARP_CONNECT_MODE_STRING(ep) \
 996         ((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"
 997
 998 /* Called as a result of the event:
 999  * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
1000  */
1001 static void
1002 qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
1003                        struct qed_iwarp_ep *ep, u8 fw_return_code)
1004 {
1005         struct qed_iwarp_cm_event_params params;
1006
1007         if (ep->connect_mode == TCP_CONNECT_ACTIVE)
1008                 params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
1009         else
1010                 params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;
1011
1012         if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
1013                 qed_iwarp_parse_private_data(p_hwfn, ep);
1014
1015         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1016                    "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
1017                    ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);
1018
1019         params.cm_info = &ep->cm_info;
1020
1021         params.ep_context = ep;
1022
1023         switch (fw_return_code) {
1024         case RDMA_RETURN_OK:
1025                 ep->qp->max_rd_atomic_req = ep->cm_info.ord;
1026                 ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
1027                 qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
1028                 ep->state = QED_IWARP_EP_ESTABLISHED;
1029                 params.status = 0;
1030                 break;
1031         case IWARP_CONN_ERROR_MPA_TIMEOUT:
1032                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
1033                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1034                 params.status = -EBUSY;
1035                 break;
1036         case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
1037                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
1038                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1039                 params.status = -ECONNREFUSED;
1040                 break;
1041         case IWARP_CONN_ERROR_MPA_RST:
1042                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
1043                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
1044                           ep->tcp_cid);
1045                 params.status = -ECONNRESET;
1046                 break;
1047         case IWARP_CONN_ERROR_MPA_FIN:
1048                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
1049                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1050                 params.status = -ECONNREFUSED;
1051                 break;
1052         case IWARP_CONN_ERROR_MPA_INSUF_IRD:
1053                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
1054                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1055                 params.status = -ECONNREFUSED;
1056                 break;
1057         case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
1058                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
1059                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1060                 params.status = -ECONNREFUSED;
1061                 break;
1062         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
1063                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
1064                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1065                 params.status = -ECONNREFUSED;
1066                 break;
1067         case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
1068                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
1069                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1070                 params.status = -ECONNREFUSED;
1071                 break;
1072         case IWARP_CONN_ERROR_MPA_TERMINATE:
1073                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
1074                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
1075                 params.status = -ECONNREFUSED;
1076                 break;
1077         default:
1078                 params.status = -ECONNRESET;
1079                 break;
1080         }
1081
1082         if (fw_return_code != RDMA_RETURN_OK)
1083                 /* paired with READ_ONCE in destroy_qp */
1084                 smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
1085
1086         ep->event_cb(ep->cb_context, &params);
1087
1088         /* on passive side, if there is no associated QP (REJECT) we need to
1089          * return the ep to the pool, (in the regular case we add an element
1090          * in accept instead of this one.
1091          * In both cases we need to remove it from the ep_list.
1092          */
1093         if (fw_return_code != RDMA_RETURN_OK) {
1094                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1095                 if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
1096                     (!ep->qp)) {        /* Rejected */
1097                         qed_iwarp_return_ep(p_hwfn, ep);
1098                 } else {
1099                         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1100                         list_del(&ep->list_entry);
1101                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1102                 }
1103         }
1104 }
1105
1106 static void
1107 qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
1108                              struct qed_iwarp_ep *ep, u8 *mpa_data_size)
1109 {
1110         struct mpa_v2_hdr *mpa_v2_params;
1111         u16 mpa_ird, mpa_ord;
1112
1113         *mpa_data_size = 0;
1114         if (MPA_REV2(ep->mpa_rev)) {
1115                 mpa_v2_params =
1116                     (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
1117                 *mpa_data_size = sizeof(*mpa_v2_params);
1118
1119                 mpa_ird = (u16)ep->cm_info.ird;
1120                 mpa_ord = (u16)ep->cm_info.ord;
1121
1122                 if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
1123                         mpa_ird |= MPA_V2_PEER2PEER_MODEL;
1124
1125                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
1126                                 mpa_ird |= MPA_V2_SEND_RTR;
1127
1128                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
1129                                 mpa_ord |= MPA_V2_WRITE_RTR;
1130
1131                         if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
1132                                 mpa_ord |= MPA_V2_READ_RTR;
1133                 }
1134
1135                 mpa_v2_params->ird = htons(mpa_ird);
1136                 mpa_v2_params->ord = htons(mpa_ord);
1137
1138                 DP_VERBOSE(p_hwfn,
1139                            QED_MSG_RDMA,
1140                            "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
1141                            mpa_v2_params->ird,
1142                            mpa_v2_params->ord,
1143                            *((u32 *)mpa_v2_params),
1144                            mpa_ord & MPA_V2_IRD_ORD_MASK,
1145                            mpa_ird & MPA_V2_IRD_ORD_MASK,
1146                            !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
1147                            !!(mpa_ird & MPA_V2_SEND_RTR),
1148                            !!(mpa_ord & MPA_V2_WRITE_RTR),
1149                            !!(mpa_ord & MPA_V2_READ_RTR));
1150         }
1151 }
1152
1153 int qed_iwarp_connect(void *rdma_cxt,
1154                       struct qed_iwarp_connect_in *iparams,
1155                       struct qed_iwarp_connect_out *oparams)
1156 {
1157         struct qed_hwfn *p_hwfn = rdma_cxt;
1158         struct qed_iwarp_info *iwarp_info;
1159         struct qed_iwarp_ep *ep;
1160         u8 mpa_data_size = 0;
1161         u32 cid;
1162         int rc;
1163
1164         if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
1165             (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
1166                 DP_NOTICE(p_hwfn,
1167                           "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1168                           iparams->qp->icid, iparams->cm_info.ord,
1169                           iparams->cm_info.ird);
1170
1171                 return -EINVAL;
1172         }
1173
1174         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1175
1176         /* Allocate ep object */
1177         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1178         if (rc)
1179                 return rc;
1180
1181         rc = qed_iwarp_create_ep(p_hwfn, &ep);
1182         if (rc)
1183                 goto err;
1184
1185         ep->tcp_cid = cid;
1186
1187         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1188         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
1189         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1190
1191         ep->qp = iparams->qp;
1192         ep->qp->ep = ep;
1193         ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
1194         ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
1195         memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));
1196
1197         ep->cm_info.ord = iparams->cm_info.ord;
1198         ep->cm_info.ird = iparams->cm_info.ird;
1199
1200         ep->rtr_type = iwarp_info->rtr_type;
1201         if (!iwarp_info->peer2peer)
1202                 ep->rtr_type = MPA_RTR_TYPE_NONE;
1203
1204         if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
1205                 ep->cm_info.ord = 1;
1206
1207         ep->mpa_rev = iwarp_info->mpa_rev;
1208
1209         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1210
1211         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1212         ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
1213                                        mpa_data_size;
1214
1215         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1216                iparams->cm_info.private_data,
1217                iparams->cm_info.private_data_len);
1218
1219         ep->mss = iparams->mss;
1220         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
1221
1222         ep->event_cb = iparams->event_cb;
1223         ep->cb_context = iparams->cb_context;
1224         ep->connect_mode = TCP_CONNECT_ACTIVE;
1225
1226         oparams->ep_context = ep;
1227
1228         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
1229
1230         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
1231                    iparams->qp->icid, ep->tcp_cid, rc);
1232
1233         if (rc) {
1234                 qed_iwarp_destroy_ep(p_hwfn, ep, true);
1235                 goto err;
1236         }
1237
1238         return rc;
1239 err:
1240         qed_iwarp_cid_cleaned(p_hwfn, cid);
1241
1242         return rc;
1243 }
1244
1245 static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
1246 {
1247         struct qed_iwarp_ep *ep = NULL;
1248         int rc;
1249
1250         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1251
1252         if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1253                 DP_ERR(p_hwfn, "Ep list is empty\n");
1254                 goto out;
1255         }
1256
1257         ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1258                               struct qed_iwarp_ep, list_entry);
1259
1260         /* in some cases we could have failed allocating a tcp cid when added
1261          * from accept / failure... retry now..this is not the common case.
1262          */
1263         if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
1264                 rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
1265
1266                 /* if we fail we could look for another entry with a valid
1267                  * tcp_cid, but since we don't expect to reach this anyway
1268                  * it's not worth the handling
1269                  */
1270                 if (rc) {
1271                         ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
1272                         ep = NULL;
1273                         goto out;
1274                 }
1275         }
1276
1277         list_del(&ep->list_entry);
1278
1279 out:
1280         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1281         return ep;
1282 }
1283
1284 #define QED_IWARP_MAX_CID_CLEAN_TIME  100
1285 #define QED_IWARP_MAX_NO_PROGRESS_CNT 5
1286
1287 /* This function waits for all the bits of a bmap to be cleared, as long as
1288  * there is progress ( i.e. the number of bits left to be cleared decreases )
1289  * the function continues.
1290  */
1291 static int
1292 qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
1293 {
1294         int prev_weight = 0;
1295         int wait_count = 0;
1296         int weight = 0;
1297
1298         weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1299         prev_weight = weight;
1300
1301         while (weight) {
1302                 /* If the HW device is during recovery, all resources are
1303                  * immediately reset without receiving a per-cid indication
1304                  * from HW. In this case we don't expect the cid_map to be
1305                  * cleared.
1306                  */
1307                 if (p_hwfn->cdev->recov_in_prog)
1308                         return 0;
1309
1310                 msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
1311
1312                 weight = bitmap_weight(bmap->bitmap, bmap->max_count);
1313
1314                 if (prev_weight == weight) {
1315                         wait_count++;
1316                 } else {
1317                         prev_weight = weight;
1318                         wait_count = 0;
1319                 }
1320
1321                 if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
1322                         DP_NOTICE(p_hwfn,
1323                                   "%s bitmap wait timed out (%d cids pending)\n",
1324                                   bmap->name, weight);
1325                         return -EBUSY;
1326                 }
1327         }
1328         return 0;
1329 }
1330
1331 static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
1332 {
1333         int rc;
1334         int i;
1335
1336         rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
1337                                             &p_hwfn->p_rdma_info->tcp_cid_map);
1338         if (rc)
1339                 return rc;
1340
1341         /* Now free the tcp cids from the main cid map */
1342         for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
1343                 qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);
1344
1345         /* Now wait for all cids to be completed */
1346         return qed_iwarp_wait_cid_map_cleared(p_hwfn,
1347                                               &p_hwfn->p_rdma_info->cid_map);
1348 }
1349
1350 static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
1351 {
1352         struct qed_iwarp_ep *ep;
1353
1354         while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
1355                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1356
1357                 ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
1358                                       struct qed_iwarp_ep, list_entry);
1359
1360                 if (!ep) {
1361                         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1362                         break;
1363                 }
1364                 list_del(&ep->list_entry);
1365
1366                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1367
1368                 if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
1369                         qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);
1370
1371                 qed_iwarp_destroy_ep(p_hwfn, ep, false);
1372         }
1373 }
1374
1375 static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
1376 {
1377         struct qed_iwarp_ep *ep;
1378         int rc = 0;
1379         int count;
1380         u32 cid;
1381         int i;
1382
1383         count = init ? QED_IWARP_PREALLOC_CNT : 1;
1384         for (i = 0; i < count; i++) {
1385                 rc = qed_iwarp_create_ep(p_hwfn, &ep);
1386                 if (rc)
1387                         return rc;
1388
1389                 /* During initialization we allocate from the main pool,
1390                  * afterwards we allocate only from the tcp_cid.
1391                  */
1392                 if (init) {
1393                         rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
1394                         if (rc)
1395                                 goto err;
1396                         qed_iwarp_set_tcp_cid(p_hwfn, cid);
1397                 } else {
1398                         /* We don't care about the return code, it's ok if
1399                          * tcp_cid remains invalid...in this case we'll
1400                          * defer allocation
1401                          */
1402                         qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
1403                 }
1404
1405                 ep->tcp_cid = cid;
1406
1407                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1408                 list_add_tail(&ep->list_entry,
1409                               &p_hwfn->p_rdma_info->iwarp.ep_free_list);
1410                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1411         }
1412
1413         return rc;
1414
1415 err:
1416         qed_iwarp_destroy_ep(p_hwfn, ep, false);
1417
1418         return rc;
1419 }
1420
1421 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
1422 {
1423         int rc;
1424
1425         /* Allocate bitmap for tcp cid. These are used by passive side
1426          * to ensure it can allocate a tcp cid during dpc that was
1427          * pre-acquired and doesn't require dynamic allocation of ilt
1428          */
1429         rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
1430                                  QED_IWARP_PREALLOC_CNT, "TCP_CID");
1431         if (rc) {
1432                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1433                            "Failed to allocate tcp cid, rc = %d\n", rc);
1434                 return rc;
1435         }
1436
1437         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
1438         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
1439
1440         rc = qed_iwarp_prealloc_ep(p_hwfn, true);
1441         if (rc)
1442                 return rc;
1443
1444         return qed_ooo_alloc(p_hwfn);
1445 }
1446
1447 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
1448 {
1449         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1450
1451         qed_ooo_free(p_hwfn);
1452         qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
1453         kfree(iwarp_info->mpa_bufs);
1454         kfree(iwarp_info->partial_fpdus);
1455         kfree(iwarp_info->mpa_intermediate_buf);
1456 }
1457
1458 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
1459 {
1460         struct qed_hwfn *p_hwfn = rdma_cxt;
1461         struct qed_iwarp_ep *ep;
1462         u8 mpa_data_size = 0;
1463         int rc;
1464
1465         ep = iparams->ep_context;
1466         if (!ep) {
1467                 DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
1468                 return -EINVAL;
1469         }
1470
1471         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
1472                    iparams->qp->icid, ep->tcp_cid);
1473
1474         if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
1475             (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
1476                 DP_VERBOSE(p_hwfn,
1477                            QED_MSG_RDMA,
1478                            "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
1479                            iparams->qp->icid,
1480                            ep->tcp_cid, iparams->ord, iparams->ord);
1481                 return -EINVAL;
1482         }
1483
1484         qed_iwarp_prealloc_ep(p_hwfn, false);
1485
1486         ep->cb_context = iparams->cb_context;
1487         ep->qp = iparams->qp;
1488         ep->qp->ep = ep;
1489
1490         if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
1491                 /* Negotiate ord/ird: if upperlayer requested ord larger than
1492                  * ird advertised by remote, we need to decrease our ord
1493                  */
1494                 if (iparams->ord > ep->cm_info.ird)
1495                         iparams->ord = ep->cm_info.ird;
1496
1497                 if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
1498                     (iparams->ird == 0))
1499                         iparams->ird = 1;
1500         }
1501
1502         /* Update cm_info ord/ird to be negotiated values */
1503         ep->cm_info.ord = iparams->ord;
1504         ep->cm_info.ird = iparams->ird;
1505
1506         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1507
1508         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1509         ep->cm_info.private_data_len = iparams->private_data_len +
1510                                        mpa_data_size;
1511
1512         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1513                iparams->private_data, iparams->private_data_len);
1514
1515         rc = qed_iwarp_mpa_offload(p_hwfn, ep);
1516         if (rc)
1517                 qed_iwarp_modify_qp(p_hwfn,
1518                                     iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);
1519
1520         return rc;
1521 }
1522
1523 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
1524 {
1525         struct qed_hwfn *p_hwfn = rdma_cxt;
1526         struct qed_iwarp_ep *ep;
1527         u8 mpa_data_size = 0;
1528
1529         ep = iparams->ep_context;
1530         if (!ep) {
1531                 DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
1532                 return -EINVAL;
1533         }
1534
1535         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);
1536
1537         ep->cb_context = iparams->cb_context;
1538         ep->qp = NULL;
1539
1540         qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);
1541
1542         ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
1543         ep->cm_info.private_data_len = iparams->private_data_len +
1544                                        mpa_data_size;
1545
1546         memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
1547                iparams->private_data, iparams->private_data_len);
1548
1549         return qed_iwarp_mpa_offload(p_hwfn, ep);
1550 }
1551
1552 static void
1553 qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
1554                         struct qed_iwarp_cm_info *cm_info)
1555 {
1556         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
1557                    cm_info->ip_version);
1558
1559         if (cm_info->ip_version == QED_TCP_IPV4)
1560                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1561                            "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
1562                            cm_info->remote_ip, cm_info->remote_port,
1563                            cm_info->local_ip, cm_info->local_port,
1564                            cm_info->vlan);
1565         else
1566                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1567                            "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
1568                            cm_info->remote_ip, cm_info->remote_port,
1569                            cm_info->local_ip, cm_info->local_port,
1570                            cm_info->vlan);
1571
1572         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1573                    "private_data_len = %x ord = %d, ird = %d\n",
1574                    cm_info->private_data_len, cm_info->ord, cm_info->ird);
1575 }
1576
1577 static int
1578 qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
1579                       struct qed_iwarp_ll2_buff *buf, u8 handle)
1580 {
1581         int rc;
1582
1583         rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
1584                                     (u16)buf->buff_size, buf, 1);
1585         if (rc) {
1586                 DP_NOTICE(p_hwfn,
1587                           "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
1588                           rc, handle);
1589                 dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
1590                                   buf->data, buf->data_phys_addr);
1591                 kfree(buf);
1592         }
1593
1594         return rc;
1595 }
1596
1597 static bool
1598 qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
1599 {
1600         struct qed_iwarp_ep *ep = NULL;
1601         bool found = false;
1602
1603         list_for_each_entry(ep,
1604                             &p_hwfn->p_rdma_info->iwarp.ep_list,
1605                             list_entry) {
1606                 if ((ep->cm_info.local_port == cm_info->local_port) &&
1607                     (ep->cm_info.remote_port == cm_info->remote_port) &&
1608                     (ep->cm_info.vlan == cm_info->vlan) &&
1609                     !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
1610                             sizeof(cm_info->local_ip)) &&
1611                     !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
1612                             sizeof(cm_info->remote_ip))) {
1613                         found = true;
1614                         break;
1615                 }
1616         }
1617
1618         if (found) {
1619                 DP_NOTICE(p_hwfn,
1620                           "SYN received on active connection - dropping\n");
1621                 qed_iwarp_print_cm_info(p_hwfn, cm_info);
1622
1623                 return true;
1624         }
1625
1626         return false;
1627 }
1628
1629 static struct qed_iwarp_listener *
1630 qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
1631                        struct qed_iwarp_cm_info *cm_info)
1632 {
1633         struct qed_iwarp_listener *listener = NULL;
1634         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1635         bool found = false;
1636
1637         list_for_each_entry(listener,
1638                             &p_hwfn->p_rdma_info->iwarp.listen_list,
1639                             list_entry) {
1640                 if (listener->port == cm_info->local_port) {
1641                         if (!memcmp(listener->ip_addr,
1642                                     ip_zero, sizeof(ip_zero))) {
1643                                 found = true;
1644                                 break;
1645                         }
1646
1647                         if (!memcmp(listener->ip_addr,
1648                                     cm_info->local_ip,
1649                                     sizeof(cm_info->local_ip)) &&
1650                             (listener->vlan == cm_info->vlan)) {
1651                                 found = true;
1652                                 break;
1653                         }
1654                 }
1655         }
1656
1657         if (found) {
1658                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
1659                            listener);
1660                 return listener;
1661         }
1662
1663         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
1664         return NULL;
1665 }
1666
1667 static int
1668 qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
1669                        struct qed_iwarp_cm_info *cm_info,
1670                        void *buf,
1671                        u8 *remote_mac_addr,
1672                        u8 *local_mac_addr,
1673                        int *payload_len, int *tcp_start_offset)
1674 {
1675         struct vlan_ethhdr *vethh;
1676         bool vlan_valid = false;
1677         struct ipv6hdr *ip6h;
1678         struct ethhdr *ethh;
1679         struct tcphdr *tcph;
1680         struct iphdr *iph;
1681         int eth_hlen;
1682         int ip_hlen;
1683         int eth_type;
1684         int i;
1685
1686         ethh = buf;
1687         eth_type = ntohs(ethh->h_proto);
1688         if (eth_type == ETH_P_8021Q) {
1689                 vlan_valid = true;
1690                 vethh = (struct vlan_ethhdr *)ethh;
1691                 cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
1692                 eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
1693         }
1694
1695         eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);
1696
1697         if (!ether_addr_equal(ethh->h_dest,
1698                               p_hwfn->p_rdma_info->iwarp.mac_addr)) {
1699                 DP_VERBOSE(p_hwfn,
1700                            QED_MSG_RDMA,
1701                            "Got unexpected mac %pM instead of %pM\n",
1702                            ethh->h_dest, p_hwfn->p_rdma_info->iwarp.mac_addr);
1703                 return -EINVAL;
1704         }
1705
1706         ether_addr_copy(remote_mac_addr, ethh->h_source);
1707         ether_addr_copy(local_mac_addr, ethh->h_dest);
1708
1709         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
1710                    eth_type, ethh->h_source);
1711
1712         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
1713                    eth_hlen, ethh->h_dest);
1714
1715         iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
1716
1717         if (eth_type == ETH_P_IP) {
1718                 if (iph->protocol != IPPROTO_TCP) {
1719                         DP_NOTICE(p_hwfn,
1720                                   "Unexpected ip protocol on ll2 %x\n",
1721                                   iph->protocol);
1722                         return -EINVAL;
1723                 }
1724
1725                 cm_info->local_ip[0] = ntohl(iph->daddr);
1726                 cm_info->remote_ip[0] = ntohl(iph->saddr);
1727                 cm_info->ip_version = QED_TCP_IPV4;
1728
1729                 ip_hlen = (iph->ihl) * sizeof(u32);
1730                 *payload_len = ntohs(iph->tot_len) - ip_hlen;
1731         } else if (eth_type == ETH_P_IPV6) {
1732                 ip6h = (struct ipv6hdr *)iph;
1733
1734                 if (ip6h->nexthdr != IPPROTO_TCP) {
1735                         DP_NOTICE(p_hwfn,
1736                                   "Unexpected ip protocol on ll2 %x\n",
1737                                   iph->protocol);
1738                         return -EINVAL;
1739                 }
1740
1741                 for (i = 0; i < 4; i++) {
1742                         cm_info->local_ip[i] =
1743                             ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
1744                         cm_info->remote_ip[i] =
1745                             ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
1746                 }
1747                 cm_info->ip_version = QED_TCP_IPV6;
1748
1749                 ip_hlen = sizeof(*ip6h);
1750                 *payload_len = ntohs(ip6h->payload_len);
1751         } else {
1752                 DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
1753                 return -EINVAL;
1754         }
1755
1756         tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);
1757
1758         if (!tcph->syn) {
1759                 DP_NOTICE(p_hwfn,
1760                           "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
1761                           iph->ihl, tcph->source, tcph->dest);
1762                 return -EINVAL;
1763         }
1764
1765         cm_info->local_port = ntohs(tcph->dest);
1766         cm_info->remote_port = ntohs(tcph->source);
1767
1768         qed_iwarp_print_cm_info(p_hwfn, cm_info);
1769
1770         *tcp_start_offset = eth_hlen + ip_hlen;
1771
1772         return 0;
1773 }
1774
1775 static struct qed_iwarp_fpdu *qed_iwarp_get_curr_fpdu(struct qed_hwfn *p_hwfn,
1776                                                       u16 cid)
1777 {
1778         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
1779         struct qed_iwarp_fpdu *partial_fpdu;
1780         u32 idx;
1781
1782         idx = cid - qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_IWARP);
1783         if (idx >= iwarp_info->max_num_partial_fpdus) {
1784                 DP_ERR(p_hwfn, "Invalid cid %x max_num_partial_fpdus=%x\n", cid,
1785                        iwarp_info->max_num_partial_fpdus);
1786                 return NULL;
1787         }
1788
1789         partial_fpdu = &iwarp_info->partial_fpdus[idx];
1790
1791         return partial_fpdu;
1792 }
1793
1794 enum qed_iwarp_mpa_pkt_type {
1795         QED_IWARP_MPA_PKT_PACKED,
1796         QED_IWARP_MPA_PKT_PARTIAL,
1797         QED_IWARP_MPA_PKT_UNALIGNED
1798 };
1799
1800 #define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
1801 #define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
1802 #define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)
1803
1804 /* Pad to multiple of 4 */
1805 #define QED_IWARP_PDU_DATA_LEN_WITH_PAD(data_len) ALIGN(data_len, 4)
1806 #define QED_IWARP_FPDU_LEN_WITH_PAD(_mpa_len)                              \
1807         (QED_IWARP_PDU_DATA_LEN_WITH_PAD((_mpa_len) +                      \
1808                                          QED_IWARP_MPA_FPDU_LENGTH_SIZE) + \
1809                                          QED_IWARP_MPA_CRC32_DIGEST_SIZE)
1810
1811 /* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
1812 #define QED_IWARP_MAX_BDS_PER_FPDU 3
1813
1814 static const char * const pkt_type_str[] = {
1815         "QED_IWARP_MPA_PKT_PACKED",
1816         "QED_IWARP_MPA_PKT_PARTIAL",
1817         "QED_IWARP_MPA_PKT_UNALIGNED"
1818 };
1819
1820 static int
1821 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1822                       struct qed_iwarp_fpdu *fpdu,
1823                       struct qed_iwarp_ll2_buff *buf);
1824
1825 static enum qed_iwarp_mpa_pkt_type
1826 qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
1827                        struct qed_iwarp_fpdu *fpdu,
1828                        u16 tcp_payload_len, u8 *mpa_data)
1829 {
1830         enum qed_iwarp_mpa_pkt_type pkt_type;
1831         u16 mpa_len;
1832
1833         if (fpdu->incomplete_bytes) {
1834                 pkt_type = QED_IWARP_MPA_PKT_UNALIGNED;
1835                 goto out;
1836         }
1837
1838         /* special case of one byte remaining...
1839          * lower byte will be read next packet
1840          */
1841         if (tcp_payload_len == 1) {
1842                 fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
1843                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1844                 goto out;
1845         }
1846
1847         mpa_len = ntohs(*(__force __be16 *)mpa_data);
1848         fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1849
1850         if (fpdu->fpdu_length <= tcp_payload_len)
1851                 pkt_type = QED_IWARP_MPA_PKT_PACKED;
1852         else
1853                 pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
1854
1855 out:
1856         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1857                    "MPA_ALIGN: %s: fpdu_length=0x%x tcp_payload_len:0x%x\n",
1858                    pkt_type_str[pkt_type], fpdu->fpdu_length, tcp_payload_len);
1859
1860         return pkt_type;
1861 }
1862
1863 static void
1864 qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
1865                     struct qed_iwarp_fpdu *fpdu,
1866                     struct unaligned_opaque_data *pkt_data,
1867                     u16 tcp_payload_size, u8 placement_offset)
1868 {
1869         u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);
1870
1871         fpdu->mpa_buf = buf;
1872         fpdu->pkt_hdr = buf->data_phys_addr + placement_offset;
1873         fpdu->pkt_hdr_size = pkt_data->tcp_payload_offset;
1874         fpdu->mpa_frag = buf->data_phys_addr + first_mpa_offset;
1875         fpdu->mpa_frag_virt = (u8 *)(buf->data) + first_mpa_offset;
1876
1877         if (tcp_payload_size == 1)
1878                 fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
1879         else if (tcp_payload_size < fpdu->fpdu_length)
1880                 fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
1881         else
1882                 fpdu->incomplete_bytes = 0;     /* complete fpdu */
1883
1884         fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
1885 }
1886
1887 static int
1888 qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn,
1889                  struct qed_iwarp_fpdu *fpdu,
1890                  struct unaligned_opaque_data *pkt_data,
1891                  struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size)
1892 {
1893         u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);
1894         u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf;
1895         int rc;
1896
1897         /* need to copy the data from the partial packet stored in fpdu
1898          * to the new buf, for this we also need to move the data currently
1899          * placed on the buf. The assumption is that the buffer is big enough
1900          * since fpdu_length <= mss, we use an intermediate buffer since
1901          * we may need to copy the new data to an overlapping location
1902          */
1903         if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) {
1904                 DP_ERR(p_hwfn,
1905                        "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",
1906                        buf->buff_size, fpdu->mpa_frag_len,
1907                        tcp_payload_size, fpdu->incomplete_bytes);
1908                 return -EINVAL;
1909         }
1910
1911         DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
1912                    "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n",
1913                    fpdu->mpa_frag_virt, fpdu->mpa_frag_len,
1914                    (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);
1915
1916         memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len);
1917         memcpy(tmp_buf + fpdu->mpa_frag_len,
1918                (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);
1919
1920         rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf);
1921         if (rc)
1922                 return rc;
1923
1924         /* If we managed to post the buffer copy the data to the new buffer
1925          * o/w this will occur in the next round...
1926          */
1927         memcpy((u8 *)(buf->data), tmp_buf,
1928                fpdu->mpa_frag_len + tcp_payload_size);
1929
1930         fpdu->mpa_buf = buf;
1931         /* fpdu->pkt_hdr remains as is */
1932         /* fpdu->mpa_frag is overridden with new buf */
1933         fpdu->mpa_frag = buf->data_phys_addr;
1934         fpdu->mpa_frag_virt = buf->data;
1935         fpdu->mpa_frag_len += tcp_payload_size;
1936
1937         fpdu->incomplete_bytes -= tcp_payload_size;
1938
1939         DP_VERBOSE(p_hwfn,
1940                    QED_MSG_RDMA,
1941                    "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
1942                    buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size,
1943                    fpdu->incomplete_bytes);
1944
1945         return 0;
1946 }
1947
1948 static void
1949 qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
1950                              struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
1951 {
1952         u16 mpa_len;
1953
1954         /* Update incomplete packets if needed */
1955         if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
1956                 /* Missing lower byte is now available */
1957                 mpa_len = fpdu->fpdu_length | *mpa_data;
1958                 fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
1959                 /* one byte of hdr */
1960                 fpdu->mpa_frag_len = 1;
1961                 fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
1962                 DP_VERBOSE(p_hwfn,
1963                            QED_MSG_RDMA,
1964                            "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
1965                            mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
1966         }
1967 }
1968
1969 #define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \
1970         (GET_FIELD((_curr_pkt)->flags,     \
1971                    UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE))
1972
1973 /* This function is used to recycle a buffer using the ll2 drop option. It
1974  * uses the mechanism to ensure that all buffers posted to tx before this one
1975  * were completed. The buffer sent here will be sent as a cookie in the tx
1976  * completion function and can then be reposted to rx chain when done. The flow
1977  * that requires this is the flow where a FPDU splits over more than 3 tcp
1978  * segments. In this case the driver needs to re-post a rx buffer instead of
1979  * the one received, but driver can't simply repost a buffer it copied from
1980  * as there is a case where the buffer was originally a packed FPDU, and is
1981  * partially posted to FW. Driver needs to ensure FW is done with it.
1982  */
1983 static int
1984 qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
1985                       struct qed_iwarp_fpdu *fpdu,
1986                       struct qed_iwarp_ll2_buff *buf)
1987 {
1988         struct qed_ll2_tx_pkt_info tx_pkt;
1989         u8 ll2_handle;
1990         int rc;
1991
1992         memset(&tx_pkt, 0, sizeof(tx_pkt));
1993         tx_pkt.num_of_bds = 1;
1994         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
1995         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
1996         tx_pkt.first_frag = fpdu->pkt_hdr;
1997         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
1998         buf->piggy_buf = NULL;
1999         tx_pkt.cookie = buf;
2000
2001         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2002
2003         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2004         if (rc)
2005                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2006                            "Can't drop packet rc=%d\n", rc);
2007
2008         DP_VERBOSE(p_hwfn,
2009                    QED_MSG_RDMA,
2010                    "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n",
2011                    (unsigned long int)tx_pkt.first_frag,
2012                    tx_pkt.first_frag_len, buf, rc);
2013
2014         return rc;
2015 }
2016
2017 static int
2018 qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu)
2019 {
2020         struct qed_ll2_tx_pkt_info tx_pkt;
2021         u8 ll2_handle;
2022         int rc;
2023
2024         memset(&tx_pkt, 0, sizeof(tx_pkt));
2025         tx_pkt.num_of_bds = 1;
2026         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2027         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
2028
2029         tx_pkt.first_frag = fpdu->pkt_hdr;
2030         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2031         tx_pkt.enable_ip_cksum = true;
2032         tx_pkt.enable_l4_cksum = true;
2033         tx_pkt.calc_ip_len = true;
2034         /* vlan overload with enum iwarp_ll2_tx_queues */
2035         tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE;
2036
2037         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2038
2039         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2040         if (rc)
2041                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2042                            "Can't send right edge rc=%d\n", rc);
2043         DP_VERBOSE(p_hwfn,
2044                    QED_MSG_RDMA,
2045                    "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n",
2046                    tx_pkt.num_of_bds,
2047                    (unsigned long int)tx_pkt.first_frag,
2048                    tx_pkt.first_frag_len, rc);
2049
2050         return rc;
2051 }
2052
2053 static int
2054 qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
2055                     struct qed_iwarp_fpdu *fpdu,
2056                     struct unaligned_opaque_data *curr_pkt,
2057                     struct qed_iwarp_ll2_buff *buf,
2058                     u16 tcp_payload_size, enum qed_iwarp_mpa_pkt_type pkt_type)
2059 {
2060         struct qed_ll2_tx_pkt_info tx_pkt;
2061         u16 first_mpa_offset;
2062         u8 ll2_handle;
2063         int rc;
2064
2065         memset(&tx_pkt, 0, sizeof(tx_pkt));
2066
2067         /* An unaligned packet means it's split over two tcp segments. So the
2068          * complete packet requires 3 bds, one for the header, one for the
2069          * part of the fpdu of the first tcp segment, and the last fragment
2070          * will point to the remainder of the fpdu. A packed pdu, requires only
2071          * two bds, one for the header and one for the data.
2072          */
2073         tx_pkt.num_of_bds = (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED) ? 3 : 2;
2074         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2075         tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; /* offset in words */
2076
2077         /* Send the mpa_buf only with the last fpdu (in case of packed) */
2078         if (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED ||
2079             tcp_payload_size <= fpdu->fpdu_length)
2080                 tx_pkt.cookie = fpdu->mpa_buf;
2081
2082         tx_pkt.first_frag = fpdu->pkt_hdr;
2083         tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
2084         tx_pkt.enable_ip_cksum = true;
2085         tx_pkt.enable_l4_cksum = true;
2086         tx_pkt.calc_ip_len = true;
2087         /* vlan overload with enum iwarp_ll2_tx_queues */
2088         tx_pkt.vlan = IWARP_LL2_ALIGNED_TX_QUEUE;
2089
2090         /* special case of unaligned packet and not packed, need to send
2091          * both buffers as cookie to release.
2092          */
2093         if (tcp_payload_size == fpdu->incomplete_bytes)
2094                 fpdu->mpa_buf->piggy_buf = buf;
2095
2096         ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;
2097
2098         /* Set first fragment to header */
2099         rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
2100         if (rc)
2101                 goto out;
2102
2103         /* Set second fragment to first part of packet */
2104         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, ll2_handle,
2105                                                fpdu->mpa_frag,
2106                                                fpdu->mpa_frag_len);
2107         if (rc)
2108                 goto out;
2109
2110         if (!fpdu->incomplete_bytes)
2111                 goto out;
2112
2113         first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);
2114
2115         /* Set third fragment to second part of the packet */
2116         rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2117                                                ll2_handle,
2118                                                buf->data_phys_addr +
2119                                                first_mpa_offset,
2120                                                fpdu->incomplete_bytes);
2121 out:
2122         DP_VERBOSE(p_hwfn,
2123                    QED_MSG_RDMA,
2124                    "MPA_ALIGN: Sent FPDU num_bds=%d first_frag_len=%x, mpa_frag_len=0x%x, incomplete_bytes:0x%x rc=%d\n",
2125                    tx_pkt.num_of_bds,
2126                    tx_pkt.first_frag_len,
2127                    fpdu->mpa_frag_len,
2128                    fpdu->incomplete_bytes, rc);
2129
2130         return rc;
2131 }
2132
2133 static void
2134 qed_iwarp_mpa_get_data(struct qed_hwfn *p_hwfn,
2135                        struct unaligned_opaque_data *curr_pkt,
2136                        u32 opaque_data0, u32 opaque_data1)
2137 {
2138         u64 opaque_data;
2139
2140         opaque_data = HILO_64(cpu_to_le32(opaque_data1),
2141                               cpu_to_le32(opaque_data0));
2142         *curr_pkt = *((struct unaligned_opaque_data *)&opaque_data);
2143
2144         le16_add_cpu(&curr_pkt->first_mpa_offset,
2145                      curr_pkt->tcp_payload_offset);
2146 }
2147
2148 /* This function is called when an unaligned or incomplete MPA packet arrives
2149  * driver needs to align the packet, perhaps using previous data and send
2150  * it down to FW once it is aligned.
2151  */
2152 static int
2153 qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
2154                           struct qed_iwarp_ll2_mpa_buf *mpa_buf)
2155 {
2156         struct unaligned_opaque_data *curr_pkt = &mpa_buf->data;
2157         struct qed_iwarp_ll2_buff *buf = mpa_buf->ll2_buf;
2158         enum qed_iwarp_mpa_pkt_type pkt_type;
2159         struct qed_iwarp_fpdu *fpdu;
2160         u16 cid, first_mpa_offset;
2161         int rc = -EINVAL;
2162         u8 *mpa_data;
2163
2164         cid = le32_to_cpu(curr_pkt->cid);
2165
2166         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
2167         if (!fpdu) { /* something corrupt with cid, post rx back */
2168                 DP_ERR(p_hwfn, "Invalid cid, drop and post back to rx cid=%x\n",
2169                        cid);
2170                 goto err;
2171         }
2172
2173         do {
2174                 first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);
2175                 mpa_data = ((u8 *)(buf->data) + first_mpa_offset);
2176
2177                 pkt_type = qed_iwarp_mpa_classify(p_hwfn, fpdu,
2178                                                   mpa_buf->tcp_payload_len,
2179                                                   mpa_data);
2180
2181                 switch (pkt_type) {
2182                 case QED_IWARP_MPA_PKT_PARTIAL:
2183                         qed_iwarp_init_fpdu(buf, fpdu,
2184                                             curr_pkt,
2185                                             mpa_buf->tcp_payload_len,
2186                                             mpa_buf->placement_offset);
2187
2188                         if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2189                                 mpa_buf->tcp_payload_len = 0;
2190                                 break;
2191                         }
2192
2193                         rc = qed_iwarp_win_right_edge(p_hwfn, fpdu);
2194
2195                         if (rc) {
2196                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2197                                            "Can't send FPDU:reset rc=%d\n", rc);
2198                                 memset(fpdu, 0, sizeof(*fpdu));
2199                                 break;
2200                         }
2201
2202                         mpa_buf->tcp_payload_len = 0;
2203                         break;
2204                 case QED_IWARP_MPA_PKT_PACKED:
2205                         qed_iwarp_init_fpdu(buf, fpdu,
2206                                             curr_pkt,
2207                                             mpa_buf->tcp_payload_len,
2208                                             mpa_buf->placement_offset);
2209
2210                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2211                                                  mpa_buf->tcp_payload_len,
2212                                                  pkt_type);
2213                         if (rc) {
2214                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2215                                            "Can't send FPDU:reset rc=%d\n", rc);
2216                                 memset(fpdu, 0, sizeof(*fpdu));
2217                                 break;
2218                         }
2219
2220                         mpa_buf->tcp_payload_len -= fpdu->fpdu_length;
2221                         le16_add_cpu(&curr_pkt->first_mpa_offset,
2222                                      fpdu->fpdu_length);
2223                         break;
2224                 case QED_IWARP_MPA_PKT_UNALIGNED:
2225                         qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
2226                         if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) {
2227                                 /* special handling of fpdu split over more
2228                                  * than 2 segments
2229                                  */
2230                                 if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
2231                                         rc = qed_iwarp_win_right_edge(p_hwfn,
2232                                                                       fpdu);
2233                                         /* packet will be re-processed later */
2234                                         if (rc)
2235                                                 return rc;
2236                                 }
2237
2238                                 rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt,
2239                                                       buf,
2240                                                       mpa_buf->tcp_payload_len);
2241                                 if (rc) /* packet will be re-processed later */
2242                                         return rc;
2243
2244                                 mpa_buf->tcp_payload_len = 0;
2245                                 break;
2246                         }
2247
2248                         rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
2249                                                  mpa_buf->tcp_payload_len,
2250                                                  pkt_type);
2251                         if (rc) {
2252                                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2253                                            "Can't send FPDU:delay rc=%d\n", rc);
2254                                 /* don't reset fpdu -> we need it for next
2255                                  * classify
2256                                  */
2257                                 break;
2258                         }
2259
2260                         mpa_buf->tcp_payload_len -= fpdu->incomplete_bytes;
2261                         le16_add_cpu(&curr_pkt->first_mpa_offset,
2262                                      fpdu->incomplete_bytes);
2263
2264                         /* The framed PDU was sent - no more incomplete bytes */
2265                         fpdu->incomplete_bytes = 0;
2266                         break;
2267                 }
2268         } while (mpa_buf->tcp_payload_len && !rc);
2269
2270         return rc;
2271
2272 err:
2273         qed_iwarp_ll2_post_rx(p_hwfn,
2274                               buf,
2275                               p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle);
2276         return rc;
2277 }
2278
2279 static void qed_iwarp_process_pending_pkts(struct qed_hwfn *p_hwfn)
2280 {
2281         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2282         struct qed_iwarp_ll2_mpa_buf *mpa_buf = NULL;
2283         int rc;
2284
2285         while (!list_empty(&iwarp_info->mpa_buf_pending_list)) {
2286                 mpa_buf = list_first_entry(&iwarp_info->mpa_buf_pending_list,
2287                                            struct qed_iwarp_ll2_mpa_buf,
2288                                            list_entry);
2289
2290                 rc = qed_iwarp_process_mpa_pkt(p_hwfn, mpa_buf);
2291
2292                 /* busy means break and continue processing later, don't
2293                  * remove the buf from the pending list.
2294                  */
2295                 if (rc == -EBUSY)
2296                         break;
2297
2298                 list_move_tail(&mpa_buf->list_entry,
2299                                &iwarp_info->mpa_buf_list);
2300
2301                 if (rc) {       /* different error, don't continue */
2302                         DP_NOTICE(p_hwfn, "process pkts failed rc=%d\n", rc);
2303                         break;
2304                 }
2305         }
2306 }
2307
2308 static void
2309 qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2310 {
2311         struct qed_iwarp_ll2_mpa_buf *mpa_buf;
2312         struct qed_iwarp_info *iwarp_info;
2313         struct qed_hwfn *p_hwfn = cxt;
2314         u16 first_mpa_offset;
2315
2316         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2317         mpa_buf = list_first_entry(&iwarp_info->mpa_buf_list,
2318                                    struct qed_iwarp_ll2_mpa_buf, list_entry);
2319         if (!mpa_buf) {
2320                 DP_ERR(p_hwfn, "No free mpa buf\n");
2321                 goto err;
2322         }
2323
2324         list_del(&mpa_buf->list_entry);
2325         qed_iwarp_mpa_get_data(p_hwfn, &mpa_buf->data,
2326                                data->opaque_data_0, data->opaque_data_1);
2327
2328         first_mpa_offset = le16_to_cpu(mpa_buf->data.first_mpa_offset);
2329
2330         DP_VERBOSE(p_hwfn,
2331                    QED_MSG_RDMA,
2332                    "LL2 MPA CompRx payload_len:0x%x\tfirst_mpa_offset:0x%x\ttcp_payload_offset:0x%x\tflags:0x%x\tcid:0x%x\n",
2333                    data->length.packet_length, first_mpa_offset,
2334                    mpa_buf->data.tcp_payload_offset, mpa_buf->data.flags,
2335                    mpa_buf->data.cid);
2336
2337         mpa_buf->ll2_buf = data->cookie;
2338         mpa_buf->tcp_payload_len = data->length.packet_length -
2339                                    first_mpa_offset;
2340
2341         first_mpa_offset += data->u.placement_offset;
2342         mpa_buf->data.first_mpa_offset = cpu_to_le16(first_mpa_offset);
2343         mpa_buf->placement_offset = data->u.placement_offset;
2344
2345         list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_pending_list);
2346
2347         qed_iwarp_process_pending_pkts(p_hwfn);
2348         return;
2349 err:
2350         qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
2351                               iwarp_info->ll2_mpa_handle);
2352 }
2353
2354 static void
2355 qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
2356 {
2357         struct qed_iwarp_ll2_buff *buf = data->cookie;
2358         struct qed_iwarp_listener *listener;
2359         struct qed_ll2_tx_pkt_info tx_pkt;
2360         struct qed_iwarp_cm_info cm_info;
2361         struct qed_hwfn *p_hwfn = cxt;
2362         u8 remote_mac_addr[ETH_ALEN];
2363         u8 local_mac_addr[ETH_ALEN];
2364         struct qed_iwarp_ep *ep;
2365         int tcp_start_offset;
2366         u8 ll2_syn_handle;
2367         int payload_len;
2368         u32 hdr_size;
2369         int rc;
2370
2371         memset(&cm_info, 0, sizeof(cm_info));
2372         ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
2373
2374         /* Check if packet was received with errors... */
2375         if (data->err_flags) {
2376                 DP_NOTICE(p_hwfn, "Error received on SYN packet: 0x%x\n",
2377                           data->err_flags);
2378                 goto err;
2379         }
2380
2381         if (GET_FIELD(data->parse_flags,
2382                       PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
2383             GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
2384                 DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
2385                 goto err;
2386         }
2387
2388         rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
2389                                     data->u.placement_offset, remote_mac_addr,
2390                                     local_mac_addr, &payload_len,
2391                                     &tcp_start_offset);
2392         if (rc)
2393                 goto err;
2394
2395         /* Check if there is a listener for this 4-tuple+vlan */
2396         listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
2397         if (!listener) {
2398                 DP_VERBOSE(p_hwfn,
2399                            QED_MSG_RDMA,
2400                            "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
2401                            data->parse_flags, data->length.packet_length);
2402
2403                 memset(&tx_pkt, 0, sizeof(tx_pkt));
2404                 tx_pkt.num_of_bds = 1;
2405                 tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
2406                 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
2407                 tx_pkt.first_frag = buf->data_phys_addr +
2408                                     data->u.placement_offset;
2409                 tx_pkt.first_frag_len = data->length.packet_length;
2410                 tx_pkt.cookie = buf;
2411
2412                 rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
2413                                                &tx_pkt, true);
2414
2415                 if (rc) {
2416                         DP_NOTICE(p_hwfn,
2417                                   "Can't post SYN back to chip rc=%d\n", rc);
2418                         goto err;
2419                 }
2420                 return;
2421         }
2422
2423         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
2424         /* There may be an open ep on this connection if this is a syn
2425          * retrasnmit... need to make sure there isn't...
2426          */
2427         if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
2428                 goto err;
2429
2430         ep = qed_iwarp_get_free_ep(p_hwfn);
2431         if (!ep)
2432                 goto err;
2433
2434         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2435         list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
2436         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2437
2438         ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
2439         ether_addr_copy(ep->local_mac_addr, local_mac_addr);
2440
2441         memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));
2442
2443         hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60);
2444         ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
2445         ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);
2446
2447         ep->event_cb = listener->event_cb;
2448         ep->cb_context = listener->cb_context;
2449         ep->connect_mode = TCP_CONNECT_PASSIVE;
2450
2451         ep->syn = buf;
2452         ep->syn_ip_payload_length = (u16)payload_len;
2453         ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
2454                            tcp_start_offset;
2455
2456         rc = qed_iwarp_tcp_offload(p_hwfn, ep);
2457         if (rc) {
2458                 qed_iwarp_return_ep(p_hwfn, ep);
2459                 goto err;
2460         }
2461
2462         return;
2463 err:
2464         qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
2465 }
2466
2467 static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
2468                                      void *cookie, dma_addr_t rx_buf_addr,
2469                                      bool b_last_packet)
2470 {
2471         struct qed_iwarp_ll2_buff *buffer = cookie;
2472         struct qed_hwfn *p_hwfn = cxt;
2473
2474         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2475                           buffer->data, buffer->data_phys_addr);
2476         kfree(buffer);
2477 }
2478
2479 static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
2480                                       void *cookie, dma_addr_t first_frag_addr,
2481                                       bool b_last_fragment, bool b_last_packet)
2482 {
2483         struct qed_iwarp_ll2_buff *buffer = cookie;
2484         struct qed_iwarp_ll2_buff *piggy;
2485         struct qed_hwfn *p_hwfn = cxt;
2486
2487         if (!buffer)            /* can happen in packed mpa unaligned... */
2488                 return;
2489
2490         /* this was originally an rx packet, post it back */
2491         piggy = buffer->piggy_buf;
2492         if (piggy) {
2493                 buffer->piggy_buf = NULL;
2494                 qed_iwarp_ll2_post_rx(p_hwfn, piggy, connection_handle);
2495         }
2496
2497         qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);
2498
2499         if (connection_handle == p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle)
2500                 qed_iwarp_process_pending_pkts(p_hwfn);
2501
2502         return;
2503 }
2504
2505 static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
2506                                      void *cookie, dma_addr_t first_frag_addr,
2507                                      bool b_last_fragment, bool b_last_packet)
2508 {
2509         struct qed_iwarp_ll2_buff *buffer = cookie;
2510         struct qed_hwfn *p_hwfn = cxt;
2511
2512         if (!buffer)
2513                 return;
2514
2515         if (buffer->piggy_buf) {
2516                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2517                                   buffer->piggy_buf->buff_size,
2518                                   buffer->piggy_buf->data,
2519                                   buffer->piggy_buf->data_phys_addr);
2520
2521                 kfree(buffer->piggy_buf);
2522         }
2523
2524         dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
2525                           buffer->data, buffer->data_phys_addr);
2526
2527         kfree(buffer);
2528 }
2529
2530 /* The only slowpath for iwarp ll2 is unalign flush. When this completion
2531  * is received, need to reset the FPDU.
2532  */
2533 static void
2534 qed_iwarp_ll2_slowpath(void *cxt,
2535                        u8 connection_handle,
2536                        u32 opaque_data_0, u32 opaque_data_1)
2537 {
2538         struct unaligned_opaque_data unalign_data;
2539         struct qed_hwfn *p_hwfn = cxt;
2540         struct qed_iwarp_fpdu *fpdu;
2541         u32 cid;
2542
2543         qed_iwarp_mpa_get_data(p_hwfn, &unalign_data,
2544                                opaque_data_0, opaque_data_1);
2545
2546         cid = le32_to_cpu(unalign_data.cid);
2547
2548         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "(0x%x) Flush fpdu\n", cid);
2549
2550         fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
2551         if (fpdu)
2552                 memset(fpdu, 0, sizeof(*fpdu));
2553 }
2554
2555 static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn)
2556 {
2557         struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2558         int rc = 0;
2559
2560         if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
2561                 rc = qed_ll2_terminate_connection(p_hwfn,
2562                                                   iwarp_info->ll2_syn_handle);
2563                 if (rc)
2564                         DP_INFO(p_hwfn, "Failed to terminate syn connection\n");
2565
2566                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2567                 iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2568         }
2569
2570         if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
2571                 rc = qed_ll2_terminate_connection(p_hwfn,
2572                                                   iwarp_info->ll2_ooo_handle);
2573                 if (rc)
2574                         DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");
2575
2576                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2577                 iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2578         }
2579
2580         if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
2581                 rc = qed_ll2_terminate_connection(p_hwfn,
2582                                                   iwarp_info->ll2_mpa_handle);
2583                 if (rc)
2584                         DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");
2585
2586                 qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2587                 iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2588         }
2589
2590         qed_llh_remove_mac_filter(p_hwfn->cdev, 0,
2591                                   p_hwfn->p_rdma_info->iwarp.mac_addr);
2592
2593         return rc;
2594 }
2595
2596 static int
2597 qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
2598                             int num_rx_bufs, int buff_size, u8 ll2_handle)
2599 {
2600         struct qed_iwarp_ll2_buff *buffer;
2601         int rc = 0;
2602         int i;
2603
2604         for (i = 0; i < num_rx_bufs; i++) {
2605                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2606                 if (!buffer) {
2607                         rc = -ENOMEM;
2608                         break;
2609                 }
2610
2611                 buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
2612                                                   buff_size,
2613                                                   &buffer->data_phys_addr,
2614                                                   GFP_KERNEL);
2615                 if (!buffer->data) {
2616                         kfree(buffer);
2617                         rc = -ENOMEM;
2618                         break;
2619                 }
2620
2621                 buffer->buff_size = buff_size;
2622                 rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
2623                 if (rc)
2624                         /* buffers will be deallocated by qed_ll2 */
2625                         break;
2626         }
2627         return rc;
2628 }
2629
2630 #define QED_IWARP_MAX_BUF_SIZE(mtu)                                  \
2631         ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
2632                 ETH_CACHE_LINE_SIZE)
2633
2634 static int
2635 qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
2636                     struct qed_rdma_start_in_params *params,
2637                     u32 rcv_wnd_size)
2638 {
2639         struct qed_iwarp_info *iwarp_info;
2640         struct qed_ll2_acquire_data data;
2641         struct qed_ll2_cbs cbs;
2642         u32 buff_size;
2643         u16 n_ooo_bufs;
2644         int rc = 0;
2645         int i;
2646
2647         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2648         iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
2649         iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
2650         iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
2651
2652         iwarp_info->max_mtu = params->max_mtu;
2653
2654         ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);
2655
2656         rc = qed_llh_add_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
2657         if (rc)
2658                 return rc;
2659
2660         /* Start SYN connection */
2661         cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
2662         cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
2663         cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
2664         cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
2665         cbs.slowpath_cb = NULL;
2666         cbs.cookie = p_hwfn;
2667
2668         memset(&data, 0, sizeof(data));
2669         data.input.conn_type = QED_LL2_TYPE_IWARP;
2670         /* SYN will use ctx based queues */
2671         data.input.rx_conn_type = QED_LL2_RX_TYPE_CTX;
2672         data.input.mtu = params->max_mtu;
2673         data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
2674         data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
2675         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2676         data.input.tx_tc = PKT_LB_TC;
2677         data.input.tx_dest = QED_LL2_TX_DEST_LB;
2678         data.p_connection_handle = &iwarp_info->ll2_syn_handle;
2679         data.cbs = &cbs;
2680
2681         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2682         if (rc) {
2683                 DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
2684                 qed_llh_remove_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
2685                 return rc;
2686         }
2687
2688         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
2689         if (rc) {
2690                 DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
2691                 goto err;
2692         }
2693
2694         buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
2695         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2696                                          QED_IWARP_LL2_SYN_RX_SIZE,
2697                                          buff_size,
2698                                          iwarp_info->ll2_syn_handle);
2699         if (rc)
2700                 goto err;
2701
2702         /* Start OOO connection */
2703         data.input.conn_type = QED_LL2_TYPE_OOO;
2704         /* OOO/unaligned will use legacy ll2 queues (ram based) */
2705         data.input.rx_conn_type = QED_LL2_RX_TYPE_LEGACY;
2706         data.input.mtu = params->max_mtu;
2707
2708         n_ooo_bufs = (QED_IWARP_MAX_OOO * rcv_wnd_size) /
2709                      iwarp_info->max_mtu;
2710         n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);
2711
2712         data.input.rx_num_desc = n_ooo_bufs;
2713         data.input.rx_num_ooo_buffers = n_ooo_bufs;
2714
2715         data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
2716         data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
2717         data.p_connection_handle = &iwarp_info->ll2_ooo_handle;
2718
2719         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2720         if (rc)
2721                 goto err;
2722
2723         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
2724         if (rc)
2725                 goto err;
2726
2727         /* Start Unaligned MPA connection */
2728         cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
2729         cbs.slowpath_cb = qed_iwarp_ll2_slowpath;
2730
2731         memset(&data, 0, sizeof(data));
2732         data.input.conn_type = QED_LL2_TYPE_IWARP;
2733         data.input.mtu = params->max_mtu;
2734         /* FW requires that once a packet arrives OOO, it must have at
2735          * least 2 rx buffers available on the unaligned connection
2736          * for handling the case that it is a partial fpdu.
2737          */
2738         data.input.rx_num_desc = n_ooo_bufs * 2;
2739         data.input.tx_num_desc = data.input.rx_num_desc;
2740         data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
2741         data.input.tx_tc = PKT_LB_TC;
2742         data.input.tx_dest = QED_LL2_TX_DEST_LB;
2743         data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
2744         data.input.secondary_queue = true;
2745         data.cbs = &cbs;
2746
2747         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2748         if (rc)
2749                 goto err;
2750
2751         rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
2752         if (rc)
2753                 goto err;
2754
2755         rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
2756                                          data.input.rx_num_desc,
2757                                          buff_size,
2758                                          iwarp_info->ll2_mpa_handle);
2759         if (rc)
2760                 goto err;
2761
2762         iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
2763                                             sizeof(*iwarp_info->partial_fpdus),
2764                                             GFP_KERNEL);
2765         if (!iwarp_info->partial_fpdus) {
2766                 rc = -ENOMEM;
2767                 goto err;
2768         }
2769
2770         iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps;
2771
2772         iwarp_info->mpa_intermediate_buf = kzalloc(buff_size, GFP_KERNEL);
2773         if (!iwarp_info->mpa_intermediate_buf) {
2774                 rc = -ENOMEM;
2775                 goto err;
2776         }
2777
2778         /* The mpa_bufs array serves for pending RX packets received on the
2779          * mpa ll2 that don't have place on the tx ring and require later
2780          * processing. We can't fail on allocation of such a struct therefore
2781          * we allocate enough to take care of all rx packets
2782          */
2783         iwarp_info->mpa_bufs = kcalloc(data.input.rx_num_desc,
2784                                        sizeof(*iwarp_info->mpa_bufs),
2785                                        GFP_KERNEL);
2786         if (!iwarp_info->mpa_bufs) {
2787                 rc = -ENOMEM;
2788                 goto err;
2789         }
2790
2791         INIT_LIST_HEAD(&iwarp_info->mpa_buf_pending_list);
2792         INIT_LIST_HEAD(&iwarp_info->mpa_buf_list);
2793         for (i = 0; i < data.input.rx_num_desc; i++)
2794                 list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
2795                               &iwarp_info->mpa_buf_list);
2796         return rc;
2797 err:
2798         qed_iwarp_ll2_stop(p_hwfn);
2799
2800         return rc;
2801 }
2802
2803 static struct {
2804         u32 two_ports;
2805         u32 four_ports;
2806 } qed_iwarp_rcv_wnd_size[MAX_CHIP_IDS] = {
2807         {QED_IWARP_RCV_WND_SIZE_DEF_BB_2P, QED_IWARP_RCV_WND_SIZE_DEF_BB_4P},
2808         {QED_IWARP_RCV_WND_SIZE_DEF_AH_2P, QED_IWARP_RCV_WND_SIZE_DEF_AH_4P}
2809 };
2810
2811 int qed_iwarp_setup(struct qed_hwfn *p_hwfn,
2812                     struct qed_rdma_start_in_params *params)
2813 {
2814         struct qed_dev *cdev = p_hwfn->cdev;
2815         struct qed_iwarp_info *iwarp_info;
2816         enum chip_ids chip_id;
2817         u32 rcv_wnd_size;
2818
2819         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
2820
2821         iwarp_info->tcp_flags = QED_IWARP_TS_EN;
2822
2823         chip_id = QED_IS_BB(cdev) ? CHIP_BB : CHIP_K2;
2824         rcv_wnd_size = (qed_device_num_ports(cdev) == 4) ?
2825                 qed_iwarp_rcv_wnd_size[chip_id].four_ports :
2826                 qed_iwarp_rcv_wnd_size[chip_id].two_ports;
2827
2828         /* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
2829         iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
2830             ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
2831         iwarp_info->rcv_wnd_size = rcv_wnd_size >> iwarp_info->rcv_wnd_scale;
2832         iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
2833         iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
2834
2835         iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
2836
2837         iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
2838                                 MPA_RTR_TYPE_ZERO_WRITE |
2839                                 MPA_RTR_TYPE_ZERO_READ;
2840
2841         spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
2842         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
2843         INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);
2844
2845         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
2846                                   qed_iwarp_async_event);
2847         qed_ooo_setup(p_hwfn);
2848
2849         return qed_iwarp_ll2_start(p_hwfn, params, rcv_wnd_size);
2850 }
2851
2852 int qed_iwarp_stop(struct qed_hwfn *p_hwfn)
2853 {
2854         int rc;
2855
2856         qed_iwarp_free_prealloc_ep(p_hwfn);
2857         rc = qed_iwarp_wait_for_all_cids(p_hwfn);
2858         if (rc)
2859                 return rc;
2860
2861         return qed_iwarp_ll2_stop(p_hwfn);
2862 }
2863
2864 static void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
2865                                   struct qed_iwarp_ep *ep,
2866                                   u8 fw_return_code)
2867 {
2868         struct qed_iwarp_cm_event_params params;
2869
2870         qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
2871
2872         params.event = QED_IWARP_EVENT_CLOSE;
2873         params.ep_context = ep;
2874         params.cm_info = &ep->cm_info;
2875         params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
2876                          0 : -ECONNRESET;
2877
2878         /* paired with READ_ONCE in destroy_qp */
2879         smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2880
2881         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2882         list_del(&ep->list_entry);
2883         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
2884
2885         ep->event_cb(ep->cb_context, &params);
2886 }
2887
2888 static void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
2889                                          struct qed_iwarp_ep *ep,
2890                                          int fw_ret_code)
2891 {
2892         struct qed_iwarp_cm_event_params params;
2893         bool event_cb = false;
2894
2895         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
2896                    ep->cid, fw_ret_code);
2897
2898         switch (fw_ret_code) {
2899         case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
2900                 params.status = 0;
2901                 params.event = QED_IWARP_EVENT_DISCONNECT;
2902                 event_cb = true;
2903                 break;
2904         case IWARP_EXCEPTION_DETECTED_LLP_RESET:
2905                 params.status = -ECONNRESET;
2906                 params.event = QED_IWARP_EVENT_DISCONNECT;
2907                 event_cb = true;
2908                 break;
2909         case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
2910                 params.event = QED_IWARP_EVENT_RQ_EMPTY;
2911                 event_cb = true;
2912                 break;
2913         case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
2914                 params.event = QED_IWARP_EVENT_IRQ_FULL;
2915                 event_cb = true;
2916                 break;
2917         case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
2918                 params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
2919                 event_cb = true;
2920                 break;
2921         case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
2922                 params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
2923                 event_cb = true;
2924                 break;
2925         case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
2926                 params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
2927                 event_cb = true;
2928                 break;
2929         case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
2930                 params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
2931                 event_cb = true;
2932                 break;
2933         case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
2934                 params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
2935                 event_cb = true;
2936                 break;
2937         case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
2938                 params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
2939                 event_cb = true;
2940                 break;
2941         case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
2942                 params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
2943                 event_cb = true;
2944                 break;
2945         default:
2946                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2947                            "Unhandled exception received...fw_ret_code=%d\n",
2948                            fw_ret_code);
2949                 break;
2950         }
2951
2952         if (event_cb) {
2953                 params.ep_context = ep;
2954                 params.cm_info = &ep->cm_info;
2955                 ep->event_cb(ep->cb_context, &params);
2956         }
2957 }
2958
2959 static void
2960 qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
2961                                    struct qed_iwarp_ep *ep, u8 fw_return_code)
2962 {
2963         struct qed_iwarp_cm_event_params params;
2964
2965         memset(&params, 0, sizeof(params));
2966         params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
2967         params.ep_context = ep;
2968         params.cm_info = &ep->cm_info;
2969         /* paired with READ_ONCE in destroy_qp */
2970         smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);
2971
2972         switch (fw_return_code) {
2973         case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
2974                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2975                            "%s(0x%x) TCP connect got invalid packet\n",
2976                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2977                 params.status = -ECONNRESET;
2978                 break;
2979         case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
2980                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
2981                            "%s(0x%x) TCP Connection Reset\n",
2982                            QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2983                 params.status = -ECONNRESET;
2984                 break;
2985         case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
2986                 DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
2987                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2988                 params.status = -EBUSY;
2989                 break;
2990         case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
2991                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
2992                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2993                 params.status = -ECONNREFUSED;
2994                 break;
2995         case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
2996                 DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
2997                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
2998                 params.status = -ECONNRESET;
2999                 break;
3000         default:
3001                 DP_ERR(p_hwfn,
3002                        "%s(0x%x) Unexpected return code tcp connect: %d\n",
3003                        QED_IWARP_CONNECT_MODE_STRING(ep),
3004                        ep->tcp_cid, fw_return_code);
3005                 params.status = -ECONNRESET;
3006                 break;
3007         }
3008
3009         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
3010                 ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
3011                 qed_iwarp_return_ep(p_hwfn, ep);
3012         } else {
3013                 ep->event_cb(ep->cb_context, &params);
3014                 spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3015                 list_del(&ep->list_entry);
3016                 spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3017         }
3018 }
3019
3020 static void
3021 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
3022                            struct qed_iwarp_ep *ep, u8 fw_return_code)
3023 {
3024         u8 ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;
3025
3026         if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
3027                 /* Done with the SYN packet, post back to ll2 rx */
3028                 qed_iwarp_ll2_post_rx(p_hwfn, ep->syn, ll2_syn_handle);
3029
3030                 ep->syn = NULL;
3031
3032                 /* If connect failed - upper layer doesn't know about it */
3033                 if (fw_return_code == RDMA_RETURN_OK)
3034                         qed_iwarp_mpa_received(p_hwfn, ep);
3035                 else
3036                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
3037                                                            fw_return_code);
3038         } else {
3039                 if (fw_return_code == RDMA_RETURN_OK)
3040                         qed_iwarp_mpa_offload(p_hwfn, ep);
3041                 else
3042                         qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
3043                                                            fw_return_code);
3044         }
3045 }
3046
3047 static inline bool
3048 qed_iwarp_check_ep_ok(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
3049 {
3050         if (!ep || (ep->sig != QED_EP_SIG)) {
3051                 DP_ERR(p_hwfn, "ERROR ON ASYNC ep=%p\n", ep);
3052                 return false;
3053         }
3054
3055         return true;
3056 }
3057
3058 static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
3059                                  __le16 echo, union event_ring_data *data,
3060                                  u8 fw_return_code)
3061 {
3062         struct qed_rdma_events events = p_hwfn->p_rdma_info->events;
3063         struct regpair *fw_handle = &data->rdma_data.async_handle;
3064         struct qed_iwarp_ep *ep = NULL;
3065         u16 srq_offset;
3066         u16 srq_id;
3067         u16 cid;
3068
3069         ep = (struct qed_iwarp_ep *)(uintptr_t)HILO_64(fw_handle->hi,
3070                                                        fw_handle->lo);
3071
3072         switch (fw_event_code) {
3073         case IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE:
3074                 /* Async completion after TCP 3-way handshake */
3075                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3076                         return -EINVAL;
3077                 DP_VERBOSE(p_hwfn,
3078                            QED_MSG_RDMA,
3079                            "EP(0x%x) IWARP_EVENT_TYPE_ASYNC_CONNECT_COMPLETE fw_ret_code=%d\n",
3080                            ep->tcp_cid, fw_return_code);
3081                 qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
3082                 break;
3083         case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
3084                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3085                         return -EINVAL;
3086                 DP_VERBOSE(p_hwfn,
3087                            QED_MSG_RDMA,
3088                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
3089                            ep->cid, fw_return_code);
3090                 qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
3091                 break;
3092         case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
3093                 /* Async completion for Close Connection ramrod */
3094                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3095                         return -EINVAL;
3096                 DP_VERBOSE(p_hwfn,
3097                            QED_MSG_RDMA,
3098                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
3099                            ep->cid, fw_return_code);
3100                 qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
3101                 break;
3102         case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
3103                 /* Async event for active side only */
3104                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3105                         return -EINVAL;
3106                 DP_VERBOSE(p_hwfn,
3107                            QED_MSG_RDMA,
3108                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_MPA_REPLY_ARRIVED fw_ret_code=%d\n",
3109                            ep->cid, fw_return_code);
3110                 qed_iwarp_mpa_reply_arrived(p_hwfn, ep);
3111                 break;
3112         case IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE:
3113                 if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
3114                         return -EINVAL;
3115                 DP_VERBOSE(p_hwfn,
3116                            QED_MSG_RDMA,
3117                            "QP(0x%x) IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE fw_ret_code=%d\n",
3118                            ep->cid, fw_return_code);
3119                 qed_iwarp_mpa_complete(p_hwfn, ep, fw_return_code);
3120                 break;
3121         case IWARP_EVENT_TYPE_ASYNC_CID_CLEANED:
3122                 cid = (u16)le32_to_cpu(fw_handle->lo);
3123                 DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
3124                            "(0x%x)IWARP_EVENT_TYPE_ASYNC_CID_CLEANED\n", cid);
3125                 qed_iwarp_cid_cleaned(p_hwfn, cid);
3126
3127                 break;
3128         case IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY:
3129                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_EMPTY\n");
3130                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3131                 /* FW assigns value that is no greater than u16 */
3132                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3133                 events.affiliated_event(events.context,
3134                                         QED_IWARP_EVENT_SRQ_EMPTY,
3135                                         &srq_id);
3136                 break;
3137         case IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT:
3138                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_SRQ_LIMIT\n");
3139                 srq_offset = p_hwfn->p_rdma_info->srq_id_offset;
3140                 /* FW assigns value that is no greater than u16 */
3141                 srq_id = ((u16)le32_to_cpu(fw_handle->lo)) - srq_offset;
3142                 events.affiliated_event(events.context,
3143                                         QED_IWARP_EVENT_SRQ_LIMIT,
3144                                         &srq_id);
3145                 break;
3146         case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
3147                 DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
3148
3149                 p_hwfn->p_rdma_info->events.affiliated_event(
3150                         p_hwfn->p_rdma_info->events.context,
3151                         QED_IWARP_EVENT_CQ_OVERFLOW,
3152                         (void *)fw_handle);
3153                 break;
3154         default:
3155                 DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
3156                        fw_event_code);
3157                 return -EINVAL;
3158         }
3159         return 0;
3160 }
3161
3162 int
3163 qed_iwarp_create_listen(void *rdma_cxt,
3164                         struct qed_iwarp_listen_in *iparams,
3165                         struct qed_iwarp_listen_out *oparams)
3166 {
3167         struct qed_hwfn *p_hwfn = rdma_cxt;
3168         struct qed_iwarp_listener *listener;
3169
3170         listener = kzalloc(sizeof(*listener), GFP_KERNEL);
3171         if (!listener)
3172                 return -ENOMEM;
3173
3174         listener->ip_version = iparams->ip_version;
3175         memcpy(listener->ip_addr, iparams->ip_addr, sizeof(listener->ip_addr));
3176         listener->port = iparams->port;
3177         listener->vlan = iparams->vlan;
3178
3179         listener->event_cb = iparams->event_cb;
3180         listener->cb_context = iparams->cb_context;
3181         listener->max_backlog = iparams->max_backlog;
3182         oparams->handle = listener;
3183
3184         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3185         list_add_tail(&listener->list_entry,
3186                       &p_hwfn->p_rdma_info->iwarp.listen_list);
3187         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3188
3189         DP_VERBOSE(p_hwfn,
3190                    QED_MSG_RDMA,
3191                    "callback=%p handle=%p ip=%x:%x:%x:%x port=0x%x vlan=0x%x\n",
3192                    listener->event_cb,
3193                    listener,
3194                    listener->ip_addr[0],
3195                    listener->ip_addr[1],
3196                    listener->ip_addr[2],
3197                    listener->ip_addr[3], listener->port, listener->vlan);
3198
3199         return 0;
3200 }
3201
3202 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle)
3203 {
3204         struct qed_iwarp_listener *listener = handle;
3205         struct qed_hwfn *p_hwfn = rdma_cxt;
3206
3207         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "handle=%p\n", handle);
3208
3209         spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3210         list_del(&listener->list_entry);
3211         spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
3212
3213         kfree(listener);
3214
3215         return 0;
3216 }
3217
3218 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams)
3219 {
3220         struct qed_hwfn *p_hwfn = rdma_cxt;
3221         struct qed_sp_init_data init_data;
3222         struct qed_spq_entry *p_ent;
3223         struct qed_iwarp_ep *ep;
3224         struct qed_rdma_qp *qp;
3225         int rc;
3226
3227         ep = iparams->ep_context;
3228         if (!ep) {
3229                 DP_ERR(p_hwfn, "Ep Context receive in send_rtr is NULL\n");
3230                 return -EINVAL;
3231         }
3232
3233         qp = ep->qp;
3234
3235         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
3236                    qp->icid, ep->tcp_cid);
3237
3238         memset(&init_data, 0, sizeof(init_data));
3239         init_data.cid = qp->icid;
3240         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
3241         init_data.comp_mode = QED_SPQ_MODE_CB;
3242
3243         rc = qed_sp_init_request(p_hwfn, &p_ent,
3244                                  IWARP_RAMROD_CMD_ID_MPA_OFFLOAD_SEND_RTR,
3245                                  PROTOCOLID_IWARP, &init_data);
3246
3247         if (rc)
3248                 return rc;
3249
3250         rc = qed_spq_post(p_hwfn, p_ent, NULL);
3251
3252         DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = 0x%x\n", rc);
3253
3254         return rc;
3255 }
3256
3257 void
3258 qed_iwarp_query_qp(struct qed_rdma_qp *qp,
3259                    struct qed_rdma_query_qp_out_params *out_params)
3260 {
3261         out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
3262 }