drivers/infiniband/hw/bnxt_re/ib_verbs.c

   1 /*
   2  * Broadcom NetXtreme-E RoCE driver.
   3  *
   4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
   5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * BSD license below:
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Description: IB Verbs interpreter
  37  */
  38
  39 #include <linux/interrupt.h>
  40 #include <linux/types.h>
  41 #include <linux/pci.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/if_ether.h>
  44
  45 #include <rdma/ib_verbs.h>
  46 #include <rdma/ib_user_verbs.h>
  47 #include <rdma/ib_umem.h>
  48 #include <rdma/ib_addr.h>
  49 #include <rdma/ib_mad.h>
  50 #include <rdma/ib_cache.h>
  51
  52 #include "bnxt_ulp.h"
  53
  54 #include "roce_hsi.h"
  55 #include "qplib_res.h"
  56 #include "qplib_sp.h"
  57 #include "qplib_fp.h"
  58 #include "qplib_rcfw.h"
  59
  60 #include "bnxt_re.h"
  61 #include "ib_verbs.h"
  62 #include <rdma/bnxt_re-abi.h>
  63
  64 static int __from_ib_access_flags(int iflags)
  65 {
  66         int qflags = 0;
  67
  68         if (iflags & IB_ACCESS_LOCAL_WRITE)
  69                 qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
  70         if (iflags & IB_ACCESS_REMOTE_READ)
  71                 qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
  72         if (iflags & IB_ACCESS_REMOTE_WRITE)
  73                 qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
  74         if (iflags & IB_ACCESS_REMOTE_ATOMIC)
  75                 qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
  76         if (iflags & IB_ACCESS_MW_BIND)
  77                 qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
  78         if (iflags & IB_ZERO_BASED)
  79                 qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
  80         if (iflags & IB_ACCESS_ON_DEMAND)
  81                 qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
  82         return qflags;
  83 };
  84
  85 static enum ib_access_flags __to_ib_access_flags(int qflags)
  86 {
  87         enum ib_access_flags iflags = 0;
  88
  89         if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
  90                 iflags |= IB_ACCESS_LOCAL_WRITE;
  91         if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
  92                 iflags |= IB_ACCESS_REMOTE_WRITE;
  93         if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
  94                 iflags |= IB_ACCESS_REMOTE_READ;
  95         if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
  96                 iflags |= IB_ACCESS_REMOTE_ATOMIC;
  97         if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
  98                 iflags |= IB_ACCESS_MW_BIND;
  99         if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
 100                 iflags |= IB_ZERO_BASED;
 101         if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
 102                 iflags |= IB_ACCESS_ON_DEMAND;
 103         return iflags;
 104 };
 105
 106 static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
 107                              struct bnxt_qplib_sge *sg_list, int num)
 108 {
 109         int i, total = 0;
 110
 111         for (i = 0; i < num; i++) {
 112                 sg_list[i].addr = ib_sg_list[i].addr;
 113                 sg_list[i].lkey = ib_sg_list[i].lkey;
 114                 sg_list[i].size = ib_sg_list[i].length;
 115                 total += sg_list[i].size;
 116         }
 117         return total;
 118 }
 119
 120 /* Device */
 121 struct net_device *bnxt_re_get_netdev(struct ib_device *ibdev, u8 port_num)
 122 {
 123         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 124         struct net_device *netdev = NULL;
 125
 126         rcu_read_lock();
 127         if (rdev)
 128                 netdev = rdev->netdev;
 129         if (netdev)
 130                 dev_hold(netdev);
 131
 132         rcu_read_unlock();
 133         return netdev;
 134 }
 135
 136 int bnxt_re_query_device(struct ib_device *ibdev,
 137                          struct ib_device_attr *ib_attr,
 138                          struct ib_udata *udata)
 139 {
 140         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 141         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
 142
 143         memset(ib_attr, 0, sizeof(*ib_attr));
 144         memcpy(&ib_attr->fw_ver, dev_attr->fw_ver,
 145                min(sizeof(dev_attr->fw_ver),
 146                    sizeof(ib_attr->fw_ver)));
 147         bnxt_qplib_get_guid(rdev->netdev->dev_addr,
 148                             (u8 *)&ib_attr->sys_image_guid);
 149         ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
 150         ib_attr->page_size_cap = BNXT_RE_PAGE_SIZE_4K | BNXT_RE_PAGE_SIZE_2M;
 151
 152         ib_attr->vendor_id = rdev->en_dev->pdev->vendor;
 153         ib_attr->vendor_part_id = rdev->en_dev->pdev->device;
 154         ib_attr->hw_ver = rdev->en_dev->pdev->subsystem_device;
 155         ib_attr->max_qp = dev_attr->max_qp;
 156         ib_attr->max_qp_wr = dev_attr->max_qp_wqes;
 157         ib_attr->device_cap_flags =
 158                                     IB_DEVICE_CURR_QP_STATE_MOD
 159                                     | IB_DEVICE_RC_RNR_NAK_GEN
 160                                     | IB_DEVICE_SHUTDOWN_PORT
 161                                     | IB_DEVICE_SYS_IMAGE_GUID
 162                                     | IB_DEVICE_LOCAL_DMA_LKEY
 163                                     | IB_DEVICE_RESIZE_MAX_WR
 164                                     | IB_DEVICE_PORT_ACTIVE_EVENT
 165                                     | IB_DEVICE_N_NOTIFY_CQ
 166                                     | IB_DEVICE_MEM_WINDOW
 167                                     | IB_DEVICE_MEM_WINDOW_TYPE_2B
 168                                     | IB_DEVICE_MEM_MGT_EXTENSIONS;
 169         ib_attr->max_send_sge = dev_attr->max_qp_sges;
 170         ib_attr->max_recv_sge = dev_attr->max_qp_sges;
 171         ib_attr->max_sge_rd = dev_attr->max_qp_sges;
 172         ib_attr->max_cq = dev_attr->max_cq;
 173         ib_attr->max_cqe = dev_attr->max_cq_wqes;
 174         ib_attr->max_mr = dev_attr->max_mr;
 175         ib_attr->max_pd = dev_attr->max_pd;
 176         ib_attr->max_qp_rd_atom = dev_attr->max_qp_rd_atom;
 177         ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
 178         ib_attr->atomic_cap = IB_ATOMIC_NONE;
 179         ib_attr->masked_atomic_cap = IB_ATOMIC_NONE;
 180
 181         ib_attr->max_ee_rd_atom = 0;
 182         ib_attr->max_res_rd_atom = 0;
 183         ib_attr->max_ee_init_rd_atom = 0;
 184         ib_attr->max_ee = 0;
 185         ib_attr->max_rdd = 0;
 186         ib_attr->max_mw = dev_attr->max_mw;
 187         ib_attr->max_raw_ipv6_qp = 0;
 188         ib_attr->max_raw_ethy_qp = dev_attr->max_raw_ethy_qp;
 189         ib_attr->max_mcast_grp = 0;
 190         ib_attr->max_mcast_qp_attach = 0;
 191         ib_attr->max_total_mcast_qp_attach = 0;
 192         ib_attr->max_ah = dev_attr->max_ah;
 193
 194         ib_attr->max_fmr = 0;
 195         ib_attr->max_map_per_fmr = 0;
 196
 197         ib_attr->max_srq = dev_attr->max_srq;
 198         ib_attr->max_srq_wr = dev_attr->max_srq_wqes;
 199         ib_attr->max_srq_sge = dev_attr->max_srq_sges;
 200
 201         ib_attr->max_fast_reg_page_list_len = MAX_PBL_LVL_1_PGS;
 202
 203         ib_attr->max_pkeys = 1;
 204         ib_attr->local_ca_ack_delay = BNXT_RE_DEFAULT_ACK_DELAY;
 205         return 0;
 206 }
 207
 208 int bnxt_re_modify_device(struct ib_device *ibdev,
 209                           int device_modify_mask,
 210                           struct ib_device_modify *device_modify)
 211 {
 212         switch (device_modify_mask) {
 213         case IB_DEVICE_MODIFY_SYS_IMAGE_GUID:
 214                 /* Modify the GUID requires the modification of the GID table */
 215                 /* GUID should be made as READ-ONLY */
 216                 break;
 217         case IB_DEVICE_MODIFY_NODE_DESC:
 218                 /* Node Desc should be made as READ-ONLY */
 219                 break;
 220         default:
 221                 break;
 222         }
 223         return 0;
 224 }
 225
 226 /* Port */
 227 int bnxt_re_query_port(struct ib_device *ibdev, u8 port_num,
 228                        struct ib_port_attr *port_attr)
 229 {
 230         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 231         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
 232
 233         memset(port_attr, 0, sizeof(*port_attr));
 234
 235         if (netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev)) {
 236                 port_attr->state = IB_PORT_ACTIVE;
 237                 port_attr->phys_state = 5;
 238         } else {
 239                 port_attr->state = IB_PORT_DOWN;
 240                 port_attr->phys_state = 3;
 241         }
 242         port_attr->max_mtu = IB_MTU_4096;
 243         port_attr->active_mtu = iboe_get_mtu(rdev->netdev->mtu);
 244         port_attr->gid_tbl_len = dev_attr->max_sgid;
 245         port_attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 246                                     IB_PORT_DEVICE_MGMT_SUP |
 247                                     IB_PORT_VENDOR_CLASS_SUP;
 248         port_attr->ip_gids = true;
 249
 250         port_attr->max_msg_sz = (u32)BNXT_RE_MAX_MR_SIZE_LOW;
 251         port_attr->bad_pkey_cntr = 0;
 252         port_attr->qkey_viol_cntr = 0;
 253         port_attr->pkey_tbl_len = dev_attr->max_pkey;
 254         port_attr->lid = 0;
 255         port_attr->sm_lid = 0;
 256         port_attr->lmc = 0;
 257         port_attr->max_vl_num = 4;
 258         port_attr->sm_sl = 0;
 259         port_attr->subnet_timeout = 0;
 260         port_attr->init_type_reply = 0;
 261         port_attr->active_speed = rdev->active_speed;
 262         port_attr->active_width = rdev->active_width;
 263
 264         return 0;
 265 }
 266
 267 int bnxt_re_get_port_immutable(struct ib_device *ibdev, u8 port_num,
 268                                struct ib_port_immutable *immutable)
 269 {
 270         struct ib_port_attr port_attr;
 271
 272         if (bnxt_re_query_port(ibdev, port_num, &port_attr))
 273                 return -EINVAL;
 274
 275         immutable->pkey_tbl_len = port_attr.pkey_tbl_len;
 276         immutable->gid_tbl_len = port_attr.gid_tbl_len;
 277         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
 278         immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
 279         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 280         return 0;
 281 }
 282
 283 void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str)
 284 {
 285         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 286
 287         snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d",
 288                  rdev->dev_attr.fw_ver[0], rdev->dev_attr.fw_ver[1],
 289                  rdev->dev_attr.fw_ver[2], rdev->dev_attr.fw_ver[3]);
 290 }
 291
 292 int bnxt_re_query_pkey(struct ib_device *ibdev, u8 port_num,
 293                        u16 index, u16 *pkey)
 294 {
 295         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 296
 297         /* Ignore port_num */
 298
 299         memset(pkey, 0, sizeof(*pkey));
 300         return bnxt_qplib_get_pkey(&rdev->qplib_res,
 301                                    &rdev->qplib_res.pkey_tbl, index, pkey);
 302 }
 303
 304 int bnxt_re_query_gid(struct ib_device *ibdev, u8 port_num,
 305                       int index, union ib_gid *gid)
 306 {
 307         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 308         int rc = 0;
 309
 310         /* Ignore port_num */
 311         memset(gid, 0, sizeof(*gid));
 312         rc = bnxt_qplib_get_sgid(&rdev->qplib_res,
 313                                  &rdev->qplib_res.sgid_tbl, index,
 314                                  (struct bnxt_qplib_gid *)gid);
 315         return rc;
 316 }
 317
 318 int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context)
 319 {
 320         int rc = 0;
 321         struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
 322         struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
 323         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
 324         struct bnxt_qplib_gid *gid_to_del;
 325
 326         /* Delete the entry from the hardware */
 327         ctx = *context;
 328         if (!ctx)
 329                 return -EINVAL;
 330
 331         if (sgid_tbl && sgid_tbl->active) {
 332                 if (ctx->idx >= sgid_tbl->max)
 333                         return -EINVAL;
 334                 gid_to_del = &sgid_tbl->tbl[ctx->idx];
 335                 /* DEL_GID is called in WQ context(netdevice_event_work_handler)
 336                  * or via the ib_unregister_device path. In the former case QP1
 337                  * may not be destroyed yet, in which case just return as FW
 338                  * needs that entry to be present and will fail it's deletion.
 339                  * We could get invoked again after QP1 is destroyed OR get an
 340                  * ADD_GID call with a different GID value for the same index
 341                  * where we issue MODIFY_GID cmd to update the GID entry -- TBD
 342                  */
 343                 if (ctx->idx == 0 &&
 344                     rdma_link_local_addr((struct in6_addr *)gid_to_del) &&
 345                     ctx->refcnt == 1 && rdev->qp1_sqp) {
 346                         dev_dbg(rdev_to_dev(rdev),
 347                                 "Trying to delete GID0 while QP1 is alive\n");
 348                         return -EFAULT;
 349                 }
 350                 ctx->refcnt--;
 351                 if (!ctx->refcnt) {
 352                         rc = bnxt_qplib_del_sgid(sgid_tbl, gid_to_del, true);
 353                         if (rc) {
 354                                 dev_err(rdev_to_dev(rdev),
 355                                         "Failed to remove GID: %#x", rc);
 356                         } else {
 357                                 ctx_tbl = sgid_tbl->ctx;
 358                                 ctx_tbl[ctx->idx] = NULL;
 359                                 kfree(ctx);
 360                         }
 361                 }
 362         } else {
 363                 return -EINVAL;
 364         }
 365         return rc;
 366 }
 367
 368 int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context)
 369 {
 370         int rc;
 371         u32 tbl_idx = 0;
 372         u16 vlan_id = 0xFFFF;
 373         struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
 374         struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
 375         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
 376
 377         if ((attr->ndev) && is_vlan_dev(attr->ndev))
 378                 vlan_id = vlan_dev_vlan_id(attr->ndev);
 379
 380         rc = bnxt_qplib_add_sgid(sgid_tbl, (struct bnxt_qplib_gid *)&attr->gid,
 381                                  rdev->qplib_res.netdev->dev_addr,
 382                                  vlan_id, true, &tbl_idx);
 383         if (rc == -EALREADY) {
 384                 ctx_tbl = sgid_tbl->ctx;
 385                 ctx_tbl[tbl_idx]->refcnt++;
 386                 *context = ctx_tbl[tbl_idx];
 387                 return 0;
 388         }
 389
 390         if (rc < 0) {
 391                 dev_err(rdev_to_dev(rdev), "Failed to add GID: %#x", rc);
 392                 return rc;
 393         }
 394
 395         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 396         if (!ctx)
 397                 return -ENOMEM;
 398         ctx_tbl = sgid_tbl->ctx;
 399         ctx->idx = tbl_idx;
 400         ctx->refcnt = 1;
 401         ctx_tbl[tbl_idx] = ctx;
 402         *context = ctx;
 403
 404         return rc;
 405 }
 406
 407 enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
 408                                             u8 port_num)
 409 {
 410         return IB_LINK_LAYER_ETHERNET;
 411 }
 412
 413 #define BNXT_RE_FENCE_PBL_SIZE  DIV_ROUND_UP(BNXT_RE_FENCE_BYTES, PAGE_SIZE)
 414
 415 static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
 416 {
 417         struct bnxt_re_fence_data *fence = &pd->fence;
 418         struct ib_mr *ib_mr = &fence->mr->ib_mr;
 419         struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
 420
 421         memset(wqe, 0, sizeof(*wqe));
 422         wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
 423         wqe->wr_id = BNXT_QPLIB_FENCE_WRID;
 424         wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
 425         wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
 426         wqe->bind.zero_based = false;
 427         wqe->bind.parent_l_key = ib_mr->lkey;
 428         wqe->bind.va = (u64)(unsigned long)fence->va;
 429         wqe->bind.length = fence->size;
 430         wqe->bind.access_cntl = __from_ib_access_flags(IB_ACCESS_REMOTE_READ);
 431         wqe->bind.mw_type = SQ_BIND_MW_TYPE_TYPE1;
 432
 433         /* Save the initial rkey in fence structure for now;
 434          * wqe->bind.r_key will be set at (re)bind time.
 435          */
 436         fence->bind_rkey = ib_inc_rkey(fence->mw->rkey);
 437 }
 438
 439 static int bnxt_re_bind_fence_mw(struct bnxt_qplib_qp *qplib_qp)
 440 {
 441         struct bnxt_re_qp *qp = container_of(qplib_qp, struct bnxt_re_qp,
 442                                              qplib_qp);
 443         struct ib_pd *ib_pd = qp->ib_qp.pd;
 444         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
 445         struct bnxt_re_fence_data *fence = &pd->fence;
 446         struct bnxt_qplib_swqe *fence_wqe = &fence->bind_wqe;
 447         struct bnxt_qplib_swqe wqe;
 448         int rc;
 449
 450         memcpy(&wqe, fence_wqe, sizeof(wqe));
 451         wqe.bind.r_key = fence->bind_rkey;
 452         fence->bind_rkey = ib_inc_rkey(fence->bind_rkey);
 453
 454         dev_dbg(rdev_to_dev(qp->rdev),
 455                 "Posting bind fence-WQE: rkey: %#x QP: %d PD: %p\n",
 456                 wqe.bind.r_key, qp->qplib_qp.id, pd);
 457         rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
 458         if (rc) {
 459                 dev_err(rdev_to_dev(qp->rdev), "Failed to bind fence-WQE\n");
 460                 return rc;
 461         }
 462         bnxt_qplib_post_send_db(&qp->qplib_qp);
 463
 464         return rc;
 465 }
 466
 467 static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
 468 {
 469         struct bnxt_re_fence_data *fence = &pd->fence;
 470         struct bnxt_re_dev *rdev = pd->rdev;
 471         struct device *dev = &rdev->en_dev->pdev->dev;
 472         struct bnxt_re_mr *mr = fence->mr;
 473
 474         if (fence->mw) {
 475                 bnxt_re_dealloc_mw(fence->mw);
 476                 fence->mw = NULL;
 477         }
 478         if (mr) {
 479                 if (mr->ib_mr.rkey)
 480                         bnxt_qplib_dereg_mrw(&rdev->qplib_res, &mr->qplib_mr,
 481                                              true);
 482                 if (mr->ib_mr.lkey)
 483                         bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
 484                 kfree(mr);
 485                 fence->mr = NULL;
 486         }
 487         if (fence->dma_addr) {
 488                 dma_unmap_single(dev, fence->dma_addr, BNXT_RE_FENCE_BYTES,
 489                                  DMA_BIDIRECTIONAL);
 490                 fence->dma_addr = 0;
 491         }
 492 }
 493
 494 static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
 495 {
 496         int mr_access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_MW_BIND;
 497         struct bnxt_re_fence_data *fence = &pd->fence;
 498         struct bnxt_re_dev *rdev = pd->rdev;
 499         struct device *dev = &rdev->en_dev->pdev->dev;
 500         struct bnxt_re_mr *mr = NULL;
 501         dma_addr_t dma_addr = 0;
 502         struct ib_mw *mw;
 503         u64 pbl_tbl;
 504         int rc;
 505
 506         dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
 507                                   DMA_BIDIRECTIONAL);
 508         rc = dma_mapping_error(dev, dma_addr);
 509         if (rc) {
 510                 dev_err(rdev_to_dev(rdev), "Failed to dma-map fence-MR-mem\n");
 511                 rc = -EIO;
 512                 fence->dma_addr = 0;
 513                 goto fail;
 514         }
 515         fence->dma_addr = dma_addr;
 516
 517         /* Allocate a MR */
 518         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 519         if (!mr) {
 520                 rc = -ENOMEM;
 521                 goto fail;
 522         }
 523         fence->mr = mr;
 524         mr->rdev = rdev;
 525         mr->qplib_mr.pd = &pd->qplib_pd;
 526         mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
 527         mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
 528         rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
 529         if (rc) {
 530                 dev_err(rdev_to_dev(rdev), "Failed to alloc fence-HW-MR\n");
 531                 goto fail;
 532         }
 533
 534         /* Register MR */
 535         mr->ib_mr.lkey = mr->qplib_mr.lkey;
 536         mr->qplib_mr.va = (u64)(unsigned long)fence->va;
 537         mr->qplib_mr.total_size = BNXT_RE_FENCE_BYTES;
 538         pbl_tbl = dma_addr;
 539         rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl_tbl,
 540                                BNXT_RE_FENCE_PBL_SIZE, false, PAGE_SIZE);
 541         if (rc) {
 542                 dev_err(rdev_to_dev(rdev), "Failed to register fence-MR\n");
 543                 goto fail;
 544         }
 545         mr->ib_mr.rkey = mr->qplib_mr.rkey;
 546
 547         /* Create a fence MW only for kernel consumers */
 548         mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
 549         if (IS_ERR(mw)) {
 550                 dev_err(rdev_to_dev(rdev),
 551                         "Failed to create fence-MW for PD: %p\n", pd);
 552                 rc = PTR_ERR(mw);
 553                 goto fail;
 554         }
 555         fence->mw = mw;
 556
 557         bnxt_re_create_fence_wqe(pd);
 558         return 0;
 559
 560 fail:
 561         bnxt_re_destroy_fence_mr(pd);
 562         return rc;
 563 }
 564
 565 /* Protection Domains */
 566 int bnxt_re_dealloc_pd(struct ib_pd *ib_pd)
 567 {
 568         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
 569         struct bnxt_re_dev *rdev = pd->rdev;
 570         int rc;
 571
 572         bnxt_re_destroy_fence_mr(pd);
 573
 574         if (pd->qplib_pd.id) {
 575                 rc = bnxt_qplib_dealloc_pd(&rdev->qplib_res,
 576                                            &rdev->qplib_res.pd_tbl,
 577                                            &pd->qplib_pd);
 578                 if (rc)
 579                         dev_err(rdev_to_dev(rdev), "Failed to deallocate HW PD");
 580         }
 581
 582         kfree(pd);
 583         return 0;
 584 }
 585
 586 struct ib_pd *bnxt_re_alloc_pd(struct ib_device *ibdev,
 587                                struct ib_ucontext *ucontext,
 588                                struct ib_udata *udata)
 589 {
 590         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
 591         struct bnxt_re_ucontext *ucntx = container_of(ucontext,
 592                                                       struct bnxt_re_ucontext,
 593                                                       ib_uctx);
 594         struct bnxt_re_pd *pd;
 595         int rc;
 596
 597         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 598         if (!pd)
 599                 return ERR_PTR(-ENOMEM);
 600
 601         pd->rdev = rdev;
 602         if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) {
 603                 dev_err(rdev_to_dev(rdev), "Failed to allocate HW PD");
 604                 rc = -ENOMEM;
 605                 goto fail;
 606         }
 607
 608         if (udata) {
 609                 struct bnxt_re_pd_resp resp;
 610
 611                 if (!ucntx->dpi.dbr) {
 612                         /* Allocate DPI in alloc_pd to avoid failing of
 613                          * ibv_devinfo and family of application when DPIs
 614                          * are depleted.
 615                          */
 616                         if (bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 617                                                  &ucntx->dpi, ucntx)) {
 618                                 rc = -ENOMEM;
 619                                 goto dbfail;
 620                         }
 621                 }
 622
 623                 resp.pdid = pd->qplib_pd.id;
 624                 /* Still allow mapping this DBR to the new user PD. */
 625                 resp.dpi = ucntx->dpi.dpi;
 626                 resp.dbr = (u64)ucntx->dpi.umdbr;
 627
 628                 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
 629                 if (rc) {
 630                         dev_err(rdev_to_dev(rdev),
 631                                 "Failed to copy user response\n");
 632                         goto dbfail;
 633                 }
 634         }
 635
 636         if (!udata)
 637                 if (bnxt_re_create_fence_mr(pd))
 638                         dev_warn(rdev_to_dev(rdev),
 639                                  "Failed to create Fence-MR\n");
 640         return &pd->ib_pd;
 641 dbfail:
 642         (void)bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
 643                                     &pd->qplib_pd);
 644 fail:
 645         kfree(pd);
 646         return ERR_PTR(rc);
 647 }
 648
 649 /* Address Handles */
 650 int bnxt_re_destroy_ah(struct ib_ah *ib_ah)
 651 {
 652         struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
 653         struct bnxt_re_dev *rdev = ah->rdev;
 654         int rc;
 655
 656         rc = bnxt_qplib_destroy_ah(&rdev->qplib_res, &ah->qplib_ah);
 657         if (rc) {
 658                 dev_err(rdev_to_dev(rdev), "Failed to destroy HW AH");
 659                 return rc;
 660         }
 661         kfree(ah);
 662         return 0;
 663 }
 664
 665 struct ib_ah *bnxt_re_create_ah(struct ib_pd *ib_pd,
 666                                 struct rdma_ah_attr *ah_attr,
 667                                 struct ib_udata *udata)
 668 {
 669         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
 670         struct bnxt_re_dev *rdev = pd->rdev;
 671         struct bnxt_re_ah *ah;
 672         const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
 673         int rc;
 674         u8 nw_type;
 675
 676         if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) {
 677                 dev_err(rdev_to_dev(rdev), "Failed to alloc AH: GRH not set");
 678                 return ERR_PTR(-EINVAL);
 679         }
 680         ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
 681         if (!ah)
 682                 return ERR_PTR(-ENOMEM);
 683
 684         ah->rdev = rdev;
 685         ah->qplib_ah.pd = &pd->qplib_pd;
 686
 687         /* Supply the configuration for the HW */
 688         memcpy(ah->qplib_ah.dgid.data, grh->dgid.raw,
 689                sizeof(union ib_gid));
 690         /*
 691          * If RoCE V2 is enabled, stack will have two entries for
 692          * each GID entry. Avoiding this duplicte entry in HW. Dividing
 693          * the GID index by 2 for RoCE V2
 694          */
 695         ah->qplib_ah.sgid_index = grh->sgid_index / 2;
 696         ah->qplib_ah.host_sgid_index = grh->sgid_index;
 697         ah->qplib_ah.traffic_class = grh->traffic_class;
 698         ah->qplib_ah.flow_label = grh->flow_label;
 699         ah->qplib_ah.hop_limit = grh->hop_limit;
 700         ah->qplib_ah.sl = rdma_ah_get_sl(ah_attr);
 701         if (ib_pd->uobject &&
 702             !rdma_is_multicast_addr((struct in6_addr *)
 703                                     grh->dgid.raw) &&
 704             !rdma_link_local_addr((struct in6_addr *)
 705                                   grh->dgid.raw)) {
 706                 const struct ib_gid_attr *sgid_attr;
 707
 708                 sgid_attr = grh->sgid_attr;
 709                 /* Get network header type for this GID */
 710                 nw_type = rdma_gid_attr_network_type(sgid_attr);
 711                 switch (nw_type) {
 712                 case RDMA_NETWORK_IPV4:
 713                         ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V2IPV4;
 714                         break;
 715                 case RDMA_NETWORK_IPV6:
 716                         ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V2IPV6;
 717                         break;
 718                 default:
 719                         ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V1;
 720                         break;
 721                 }
 722         }
 723
 724         memcpy(ah->qplib_ah.dmac, ah_attr->roce.dmac, ETH_ALEN);
 725         rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah);
 726         if (rc) {
 727                 dev_err(rdev_to_dev(rdev), "Failed to allocate HW AH");
 728                 goto fail;
 729         }
 730
 731         /* Write AVID to shared page. */
 732         if (ib_pd->uobject) {
 733                 struct ib_ucontext *ib_uctx = ib_pd->uobject->context;
 734                 struct bnxt_re_ucontext *uctx;
 735                 unsigned long flag;
 736                 u32 *wrptr;
 737
 738                 uctx = container_of(ib_uctx, struct bnxt_re_ucontext, ib_uctx);
 739                 spin_lock_irqsave(&uctx->sh_lock, flag);
 740                 wrptr = (u32 *)(uctx->shpg + BNXT_RE_AVID_OFFT);
 741                 *wrptr = ah->qplib_ah.id;
 742                 wmb(); /* make sure cache is updated. */
 743                 spin_unlock_irqrestore(&uctx->sh_lock, flag);
 744         }
 745
 746         return &ah->ib_ah;
 747
 748 fail:
 749         kfree(ah);
 750         return ERR_PTR(rc);
 751 }
 752
 753 int bnxt_re_modify_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
 754 {
 755         return 0;
 756 }
 757
 758 int bnxt_re_query_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
 759 {
 760         struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
 761
 762         ah_attr->type = ib_ah->type;
 763         rdma_ah_set_sl(ah_attr, ah->qplib_ah.sl);
 764         memcpy(ah_attr->roce.dmac, ah->qplib_ah.dmac, ETH_ALEN);
 765         rdma_ah_set_grh(ah_attr, NULL, 0,
 766                         ah->qplib_ah.host_sgid_index,
 767                         0, ah->qplib_ah.traffic_class);
 768         rdma_ah_set_dgid_raw(ah_attr, ah->qplib_ah.dgid.data);
 769         rdma_ah_set_port_num(ah_attr, 1);
 770         rdma_ah_set_static_rate(ah_attr, 0);
 771         return 0;
 772 }
 773
 774 unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp)
 775         __acquires(&qp->scq->cq_lock) __acquires(&qp->rcq->cq_lock)
 776 {
 777         unsigned long flags;
 778
 779         spin_lock_irqsave(&qp->scq->cq_lock, flags);
 780         if (qp->rcq != qp->scq)
 781                 spin_lock(&qp->rcq->cq_lock);
 782         else
 783                 __acquire(&qp->rcq->cq_lock);
 784
 785         return flags;
 786 }
 787
 788 void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp,
 789                         unsigned long flags)
 790         __releases(&qp->scq->cq_lock) __releases(&qp->rcq->cq_lock)
 791 {
 792         if (qp->rcq != qp->scq)
 793                 spin_unlock(&qp->rcq->cq_lock);
 794         else
 795                 __release(&qp->rcq->cq_lock);
 796         spin_unlock_irqrestore(&qp->scq->cq_lock, flags);
 797 }
 798
 799 /* Queue Pairs */
 800 int bnxt_re_destroy_qp(struct ib_qp *ib_qp)
 801 {
 802         struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
 803         struct bnxt_re_dev *rdev = qp->rdev;
 804         int rc;
 805         unsigned int flags;
 806
 807         bnxt_qplib_flush_cqn_wq(&qp->qplib_qp);
 808         rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
 809         if (rc) {
 810                 dev_err(rdev_to_dev(rdev), "Failed to destroy HW QP");
 811                 return rc;
 812         }
 813
 814         flags = bnxt_re_lock_cqs(qp);
 815         bnxt_qplib_clean_qp(&qp->qplib_qp);
 816         bnxt_re_unlock_cqs(qp, flags);
 817         bnxt_qplib_free_qp_res(&rdev->qplib_res, &qp->qplib_qp);
 818
 819         if (ib_qp->qp_type == IB_QPT_GSI && rdev->qp1_sqp) {
 820                 rc = bnxt_qplib_destroy_ah(&rdev->qplib_res,
 821                                            &rdev->sqp_ah->qplib_ah);
 822                 if (rc) {
 823                         dev_err(rdev_to_dev(rdev),
 824                                 "Failed to destroy HW AH for shadow QP");
 825                         return rc;
 826                 }
 827
 828                 bnxt_qplib_clean_qp(&qp->qplib_qp);
 829                 rc = bnxt_qplib_destroy_qp(&rdev->qplib_res,
 830                                            &rdev->qp1_sqp->qplib_qp);
 831                 if (rc) {
 832                         dev_err(rdev_to_dev(rdev),
 833                                 "Failed to destroy Shadow QP");
 834                         return rc;
 835                 }
 836                 bnxt_qplib_free_qp_res(&rdev->qplib_res,
 837                                        &rdev->qp1_sqp->qplib_qp);
 838                 mutex_lock(&rdev->qp_lock);
 839                 list_del(&rdev->qp1_sqp->list);
 840                 atomic_dec(&rdev->qp_count);
 841                 mutex_unlock(&rdev->qp_lock);
 842
 843                 kfree(rdev->sqp_ah);
 844                 kfree(rdev->qp1_sqp);
 845                 rdev->qp1_sqp = NULL;
 846                 rdev->sqp_ah = NULL;
 847         }
 848
 849         if (!IS_ERR_OR_NULL(qp->rumem))
 850                 ib_umem_release(qp->rumem);
 851         if (!IS_ERR_OR_NULL(qp->sumem))
 852                 ib_umem_release(qp->sumem);
 853
 854         mutex_lock(&rdev->qp_lock);
 855         list_del(&qp->list);
 856         atomic_dec(&rdev->qp_count);
 857         mutex_unlock(&rdev->qp_lock);
 858         kfree(qp);
 859         return 0;
 860 }
 861
 862 static u8 __from_ib_qp_type(enum ib_qp_type type)
 863 {
 864         switch (type) {
 865         case IB_QPT_GSI:
 866                 return CMDQ_CREATE_QP1_TYPE_GSI;
 867         case IB_QPT_RC:
 868                 return CMDQ_CREATE_QP_TYPE_RC;
 869         case IB_QPT_UD:
 870                 return CMDQ_CREATE_QP_TYPE_UD;
 871         default:
 872                 return IB_QPT_MAX;
 873         }
 874 }
 875
 876 static int bnxt_re_init_user_qp(struct bnxt_re_dev *rdev, struct bnxt_re_pd *pd,
 877                                 struct bnxt_re_qp *qp, struct ib_udata *udata)
 878 {
 879         struct bnxt_re_qp_req ureq;
 880         struct bnxt_qplib_qp *qplib_qp = &qp->qplib_qp;
 881         struct ib_umem *umem;
 882         int bytes = 0;
 883         struct ib_ucontext *context = pd->ib_pd.uobject->context;
 884         struct bnxt_re_ucontext *cntx = container_of(context,
 885                                                      struct bnxt_re_ucontext,
 886                                                      ib_uctx);
 887         if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
 888                 return -EFAULT;
 889
 890         bytes = (qplib_qp->sq.max_wqe * BNXT_QPLIB_MAX_SQE_ENTRY_SIZE);
 891         /* Consider mapping PSN search memory only for RC QPs. */
 892         if (qplib_qp->type == CMDQ_CREATE_QP_TYPE_RC)
 893                 bytes += (qplib_qp->sq.max_wqe * sizeof(struct sq_psn_search));
 894         bytes = PAGE_ALIGN(bytes);
 895         umem = ib_umem_get(context, ureq.qpsva, bytes,
 896                            IB_ACCESS_LOCAL_WRITE, 1);
 897         if (IS_ERR(umem))
 898                 return PTR_ERR(umem);
 899
 900         qp->sumem = umem;
 901         qplib_qp->sq.sglist = umem->sg_head.sgl;
 902         qplib_qp->sq.nmap = umem->nmap;
 903         qplib_qp->qp_handle = ureq.qp_handle;
 904
 905         if (!qp->qplib_qp.srq) {
 906                 bytes = (qplib_qp->rq.max_wqe * BNXT_QPLIB_MAX_RQE_ENTRY_SIZE);
 907                 bytes = PAGE_ALIGN(bytes);
 908                 umem = ib_umem_get(context, ureq.qprva, bytes,
 909                                    IB_ACCESS_LOCAL_WRITE, 1);
 910                 if (IS_ERR(umem))
 911                         goto rqfail;
 912                 qp->rumem = umem;
 913                 qplib_qp->rq.sglist = umem->sg_head.sgl;
 914                 qplib_qp->rq.nmap = umem->nmap;
 915         }
 916
 917         qplib_qp->dpi = &cntx->dpi;
 918         return 0;
 919 rqfail:
 920         ib_umem_release(qp->sumem);
 921         qp->sumem = NULL;
 922         qplib_qp->sq.sglist = NULL;
 923         qplib_qp->sq.nmap = 0;
 924
 925         return PTR_ERR(umem);
 926 }
 927
 928 static struct bnxt_re_ah *bnxt_re_create_shadow_qp_ah
 929                                 (struct bnxt_re_pd *pd,
 930                                  struct bnxt_qplib_res *qp1_res,
 931                                  struct bnxt_qplib_qp *qp1_qp)
 932 {
 933         struct bnxt_re_dev *rdev = pd->rdev;
 934         struct bnxt_re_ah *ah;
 935         union ib_gid sgid;
 936         int rc;
 937
 938         ah = kzalloc(sizeof(*ah), GFP_KERNEL);
 939         if (!ah)
 940                 return NULL;
 941
 942         ah->rdev = rdev;
 943         ah->qplib_ah.pd = &pd->qplib_pd;
 944
 945         rc = bnxt_re_query_gid(&rdev->ibdev, 1, 0, &sgid);
 946         if (rc)
 947                 goto fail;
 948
 949         /* supply the dgid data same as sgid */
 950         memcpy(ah->qplib_ah.dgid.data, &sgid.raw,
 951                sizeof(union ib_gid));
 952         ah->qplib_ah.sgid_index = 0;
 953
 954         ah->qplib_ah.traffic_class = 0;
 955         ah->qplib_ah.flow_label = 0;
 956         ah->qplib_ah.hop_limit = 1;
 957         ah->qplib_ah.sl = 0;
 958         /* Have DMAC same as SMAC */
 959         ether_addr_copy(ah->qplib_ah.dmac, rdev->netdev->dev_addr);
 960
 961         rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah);
 962         if (rc) {
 963                 dev_err(rdev_to_dev(rdev),
 964                         "Failed to allocate HW AH for Shadow QP");
 965                 goto fail;
 966         }
 967
 968         return ah;
 969
 970 fail:
 971         kfree(ah);
 972         return NULL;
 973 }
 974
 975 static struct bnxt_re_qp *bnxt_re_create_shadow_qp
 976                                 (struct bnxt_re_pd *pd,
 977                                  struct bnxt_qplib_res *qp1_res,
 978                                  struct bnxt_qplib_qp *qp1_qp)
 979 {
 980         struct bnxt_re_dev *rdev = pd->rdev;
 981         struct bnxt_re_qp *qp;
 982         int rc;
 983
 984         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 985         if (!qp)
 986                 return NULL;
 987
 988         qp->rdev = rdev;
 989
 990         /* Initialize the shadow QP structure from the QP1 values */
 991         ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);
 992
 993         qp->qplib_qp.pd = &pd->qplib_pd;
 994         qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
 995         qp->qplib_qp.type = IB_QPT_UD;
 996
 997         qp->qplib_qp.max_inline_data = 0;
 998         qp->qplib_qp.sig_type = true;
 999
1000         /* Shadow QP SQ depth should be same as QP1 RQ depth */
1001         qp->qplib_qp.sq.max_wqe = qp1_qp->rq.max_wqe;
1002         qp->qplib_qp.sq.max_sge = 2;
1003         /* Q full delta can be 1 since it is internal QP */
1004         qp->qplib_qp.sq.q_full_delta = 1;
1005
1006         qp->qplib_qp.scq = qp1_qp->scq;
1007         qp->qplib_qp.rcq = qp1_qp->rcq;
1008
1009         qp->qplib_qp.rq.max_wqe = qp1_qp->rq.max_wqe;
1010         qp->qplib_qp.rq.max_sge = qp1_qp->rq.max_sge;
1011         /* Q full delta can be 1 since it is internal QP */
1012         qp->qplib_qp.rq.q_full_delta = 1;
1013
1014         qp->qplib_qp.mtu = qp1_qp->mtu;
1015
1016         qp->qplib_qp.sq_hdr_buf_size = 0;
1017         qp->qplib_qp.rq_hdr_buf_size = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
1018         qp->qplib_qp.dpi = &rdev->dpi_privileged;
1019
1020         rc = bnxt_qplib_create_qp(qp1_res, &qp->qplib_qp);
1021         if (rc)
1022                 goto fail;
1023
1024         rdev->sqp_id = qp->qplib_qp.id;
1025
1026         spin_lock_init(&qp->sq_lock);
1027         INIT_LIST_HEAD(&qp->list);
1028         mutex_lock(&rdev->qp_lock);
1029         list_add_tail(&qp->list, &rdev->qp_list);
1030         atomic_inc(&rdev->qp_count);
1031         mutex_unlock(&rdev->qp_lock);
1032         return qp;
1033 fail:
1034         kfree(qp);
1035         return NULL;
1036 }
1037
1038 struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
1039                                 struct ib_qp_init_attr *qp_init_attr,
1040                                 struct ib_udata *udata)
1041 {
1042         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
1043         struct bnxt_re_dev *rdev = pd->rdev;
1044         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
1045         struct bnxt_re_qp *qp;
1046         struct bnxt_re_cq *cq;
1047         struct bnxt_re_srq *srq;
1048         int rc, entries;
1049
1050         if ((qp_init_attr->cap.max_send_wr > dev_attr->max_qp_wqes) ||
1051             (qp_init_attr->cap.max_recv_wr > dev_attr->max_qp_wqes) ||
1052             (qp_init_attr->cap.max_send_sge > dev_attr->max_qp_sges) ||
1053             (qp_init_attr->cap.max_recv_sge > dev_attr->max_qp_sges) ||
1054             (qp_init_attr->cap.max_inline_data > dev_attr->max_inline_data))
1055                 return ERR_PTR(-EINVAL);
1056
1057         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1058         if (!qp)
1059                 return ERR_PTR(-ENOMEM);
1060
1061         qp->rdev = rdev;
1062         ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);
1063         qp->qplib_qp.pd = &pd->qplib_pd;
1064         qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
1065         qp->qplib_qp.type = __from_ib_qp_type(qp_init_attr->qp_type);
1066         if (qp->qplib_qp.type == IB_QPT_MAX) {
1067                 dev_err(rdev_to_dev(rdev), "QP type 0x%x not supported",
1068                         qp->qplib_qp.type);
1069                 rc = -EINVAL;
1070                 goto fail;
1071         }
1072         qp->qplib_qp.max_inline_data = qp_init_attr->cap.max_inline_data;
1073         qp->qplib_qp.sig_type = ((qp_init_attr->sq_sig_type ==
1074                                   IB_SIGNAL_ALL_WR) ? true : false);
1075
1076         qp->qplib_qp.sq.max_sge = qp_init_attr->cap.max_send_sge;
1077         if (qp->qplib_qp.sq.max_sge > dev_attr->max_qp_sges)
1078                 qp->qplib_qp.sq.max_sge = dev_attr->max_qp_sges;
1079
1080         if (qp_init_attr->send_cq) {
1081                 cq = container_of(qp_init_attr->send_cq, struct bnxt_re_cq,
1082                                   ib_cq);
1083                 if (!cq) {
1084                         dev_err(rdev_to_dev(rdev), "Send CQ not found");
1085                         rc = -EINVAL;
1086                         goto fail;
1087                 }
1088                 qp->qplib_qp.scq = &cq->qplib_cq;
1089                 qp->scq = cq;
1090         }
1091
1092         if (qp_init_attr->recv_cq) {
1093                 cq = container_of(qp_init_attr->recv_cq, struct bnxt_re_cq,
1094                                   ib_cq);
1095                 if (!cq) {
1096                         dev_err(rdev_to_dev(rdev), "Receive CQ not found");
1097                         rc = -EINVAL;
1098                         goto fail;
1099                 }
1100                 qp->qplib_qp.rcq = &cq->qplib_cq;
1101                 qp->rcq = cq;
1102         }
1103
1104         if (qp_init_attr->srq) {
1105                 srq = container_of(qp_init_attr->srq, struct bnxt_re_srq,
1106                                    ib_srq);
1107                 if (!srq) {
1108                         dev_err(rdev_to_dev(rdev), "SRQ not found");
1109                         rc = -EINVAL;
1110                         goto fail;
1111                 }
1112                 qp->qplib_qp.srq = &srq->qplib_srq;
1113                 qp->qplib_qp.rq.max_wqe = 0;
1114         } else {
1115                 /* Allocate 1 more than what's provided so posting max doesn't
1116                  * mean empty
1117                  */
1118                 entries = roundup_pow_of_two(qp_init_attr->cap.max_recv_wr + 1);
1119                 qp->qplib_qp.rq.max_wqe = min_t(u32, entries,
1120                                                 dev_attr->max_qp_wqes + 1);
1121
1122                 qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
1123                                                 qp_init_attr->cap.max_recv_wr;
1124
1125                 qp->qplib_qp.rq.max_sge = qp_init_attr->cap.max_recv_sge;
1126                 if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
1127                         qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
1128         }
1129
1130         qp->qplib_qp.mtu = ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
1131
1132         if (qp_init_attr->qp_type == IB_QPT_GSI) {
1133                 /* Allocate 1 more than what's provided */
1134                 entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr + 1);
1135                 qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
1136                                                 dev_attr->max_qp_wqes + 1);
1137                 qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
1138                                                 qp_init_attr->cap.max_send_wr;
1139                 qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
1140                 if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
1141                         qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
1142                 qp->qplib_qp.sq.max_sge++;
1143                 if (qp->qplib_qp.sq.max_sge > dev_attr->max_qp_sges)
1144                         qp->qplib_qp.sq.max_sge = dev_attr->max_qp_sges;
1145
1146                 qp->qplib_qp.rq_hdr_buf_size =
1147                                         BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
1148
1149                 qp->qplib_qp.sq_hdr_buf_size =
1150                                         BNXT_QPLIB_MAX_QP1_SQ_HDR_SIZE_V2;
1151                 qp->qplib_qp.dpi = &rdev->dpi_privileged;
1152                 rc = bnxt_qplib_create_qp1(&rdev->qplib_res, &qp->qplib_qp);
1153                 if (rc) {
1154                         dev_err(rdev_to_dev(rdev), "Failed to create HW QP1");
1155                         goto fail;
1156                 }
1157                 /* Create a shadow QP to handle the QP1 traffic */
1158                 rdev->qp1_sqp = bnxt_re_create_shadow_qp(pd, &rdev->qplib_res,
1159                                                          &qp->qplib_qp);
1160                 if (!rdev->qp1_sqp) {
1161                         rc = -EINVAL;
1162                         dev_err(rdev_to_dev(rdev),
1163                                 "Failed to create Shadow QP for QP1");
1164                         goto qp_destroy;
1165                 }
1166                 rdev->sqp_ah = bnxt_re_create_shadow_qp_ah(pd, &rdev->qplib_res,
1167                                                            &qp->qplib_qp);
1168                 if (!rdev->sqp_ah) {
1169                         bnxt_qplib_destroy_qp(&rdev->qplib_res,
1170                                               &rdev->qp1_sqp->qplib_qp);
1171                         rc = -EINVAL;
1172                         dev_err(rdev_to_dev(rdev),
1173                                 "Failed to create AH entry for ShadowQP");
1174                         goto qp_destroy;
1175                 }
1176
1177         } else {
1178                 /* Allocate 128 + 1 more than what's provided */
1179                 entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr +
1180                                              BNXT_QPLIB_RESERVED_QP_WRS + 1);
1181                 qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
1182                                                 dev_attr->max_qp_wqes +
1183                                                 BNXT_QPLIB_RESERVED_QP_WRS + 1);
1184                 qp->qplib_qp.sq.q_full_delta = BNXT_QPLIB_RESERVED_QP_WRS + 1;
1185
1186                 /*
1187                  * Reserving one slot for Phantom WQE. Application can
1188                  * post one extra entry in this case. But allowing this to avoid
1189                  * unexpected Queue full condition
1190                  */
1191
1192                 qp->qplib_qp.sq.q_full_delta -= 1;
1193
1194                 qp->qplib_qp.max_rd_atomic = dev_attr->max_qp_rd_atom;
1195                 qp->qplib_qp.max_dest_rd_atomic = dev_attr->max_qp_init_rd_atom;
1196                 if (udata) {
1197                         rc = bnxt_re_init_user_qp(rdev, pd, qp, udata);
1198                         if (rc)
1199                                 goto fail;
1200                 } else {
1201                         qp->qplib_qp.dpi = &rdev->dpi_privileged;
1202                 }
1203
1204                 rc = bnxt_qplib_create_qp(&rdev->qplib_res, &qp->qplib_qp);
1205                 if (rc) {
1206                         dev_err(rdev_to_dev(rdev), "Failed to create HW QP");
1207                         goto free_umem;
1208                 }
1209         }
1210
1211         qp->ib_qp.qp_num = qp->qplib_qp.id;
1212         spin_lock_init(&qp->sq_lock);
1213         spin_lock_init(&qp->rq_lock);
1214
1215         if (udata) {
1216                 struct bnxt_re_qp_resp resp;
1217
1218                 resp.qpid = qp->ib_qp.qp_num;
1219                 resp.rsvd = 0;
1220                 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
1221                 if (rc) {
1222                         dev_err(rdev_to_dev(rdev), "Failed to copy QP udata");
1223                         goto qp_destroy;
1224                 }
1225         }
1226         INIT_LIST_HEAD(&qp->list);
1227         mutex_lock(&rdev->qp_lock);
1228         list_add_tail(&qp->list, &rdev->qp_list);
1229         atomic_inc(&rdev->qp_count);
1230         mutex_unlock(&rdev->qp_lock);
1231
1232         return &qp->ib_qp;
1233 qp_destroy:
1234         bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
1235 free_umem:
1236         if (udata) {
1237                 if (qp->rumem)
1238                         ib_umem_release(qp->rumem);
1239                 if (qp->sumem)
1240                         ib_umem_release(qp->sumem);
1241         }
1242 fail:
1243         kfree(qp);
1244         return ERR_PTR(rc);
1245 }
1246
1247 static u8 __from_ib_qp_state(enum ib_qp_state state)
1248 {
1249         switch (state) {
1250         case IB_QPS_RESET:
1251                 return CMDQ_MODIFY_QP_NEW_STATE_RESET;
1252         case IB_QPS_INIT:
1253                 return CMDQ_MODIFY_QP_NEW_STATE_INIT;
1254         case IB_QPS_RTR:
1255                 return CMDQ_MODIFY_QP_NEW_STATE_RTR;
1256         case IB_QPS_RTS:
1257                 return CMDQ_MODIFY_QP_NEW_STATE_RTS;
1258         case IB_QPS_SQD:
1259                 return CMDQ_MODIFY_QP_NEW_STATE_SQD;
1260         case IB_QPS_SQE:
1261                 return CMDQ_MODIFY_QP_NEW_STATE_SQE;
1262         case IB_QPS_ERR:
1263         default:
1264                 return CMDQ_MODIFY_QP_NEW_STATE_ERR;
1265         }
1266 }
1267
1268 static enum ib_qp_state __to_ib_qp_state(u8 state)
1269 {
1270         switch (state) {
1271         case CMDQ_MODIFY_QP_NEW_STATE_RESET:
1272                 return IB_QPS_RESET;
1273         case CMDQ_MODIFY_QP_NEW_STATE_INIT:
1274                 return IB_QPS_INIT;
1275         case CMDQ_MODIFY_QP_NEW_STATE_RTR:
1276                 return IB_QPS_RTR;
1277         case CMDQ_MODIFY_QP_NEW_STATE_RTS:
1278                 return IB_QPS_RTS;
1279         case CMDQ_MODIFY_QP_NEW_STATE_SQD:
1280                 return IB_QPS_SQD;
1281         case CMDQ_MODIFY_QP_NEW_STATE_SQE:
1282                 return IB_QPS_SQE;
1283         case CMDQ_MODIFY_QP_NEW_STATE_ERR:
1284         default:
1285                 return IB_QPS_ERR;
1286         }
1287 }
1288
1289 static u32 __from_ib_mtu(enum ib_mtu mtu)
1290 {
1291         switch (mtu) {
1292         case IB_MTU_256:
1293                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_256;
1294         case IB_MTU_512:
1295                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_512;
1296         case IB_MTU_1024:
1297                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_1024;
1298         case IB_MTU_2048:
1299                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
1300         case IB_MTU_4096:
1301                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_4096;
1302         default:
1303                 return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
1304         }
1305 }
1306
1307 static enum ib_mtu __to_ib_mtu(u32 mtu)
1308 {
1309         switch (mtu & CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) {
1310         case CMDQ_MODIFY_QP_PATH_MTU_MTU_256:
1311                 return IB_MTU_256;
1312         case CMDQ_MODIFY_QP_PATH_MTU_MTU_512:
1313                 return IB_MTU_512;
1314         case CMDQ_MODIFY_QP_PATH_MTU_MTU_1024:
1315                 return IB_MTU_1024;
1316         case CMDQ_MODIFY_QP_PATH_MTU_MTU_2048:
1317                 return IB_MTU_2048;
1318         case CMDQ_MODIFY_QP_PATH_MTU_MTU_4096:
1319                 return IB_MTU_4096;
1320         default:
1321                 return IB_MTU_2048;
1322         }
1323 }
1324
1325 /* Shared Receive Queues */
1326 int bnxt_re_destroy_srq(struct ib_srq *ib_srq)
1327 {
1328         struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1329                                                ib_srq);
1330         struct bnxt_re_dev *rdev = srq->rdev;
1331         struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
1332         struct bnxt_qplib_nq *nq = NULL;
1333         int rc;
1334
1335         if (qplib_srq->cq)
1336                 nq = qplib_srq->cq->nq;
1337         rc = bnxt_qplib_destroy_srq(&rdev->qplib_res, qplib_srq);
1338         if (rc) {
1339                 dev_err(rdev_to_dev(rdev), "Destroy HW SRQ failed!");
1340                 return rc;
1341         }
1342
1343         if (srq->umem)
1344                 ib_umem_release(srq->umem);
1345         kfree(srq);
1346         atomic_dec(&rdev->srq_count);
1347         if (nq)
1348                 nq->budget--;
1349         return 0;
1350 }
1351
1352 static int bnxt_re_init_user_srq(struct bnxt_re_dev *rdev,
1353                                  struct bnxt_re_pd *pd,
1354                                  struct bnxt_re_srq *srq,
1355                                  struct ib_udata *udata)
1356 {
1357         struct bnxt_re_srq_req ureq;
1358         struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
1359         struct ib_umem *umem;
1360         int bytes = 0;
1361         struct ib_ucontext *context = pd->ib_pd.uobject->context;
1362         struct bnxt_re_ucontext *cntx = container_of(context,
1363                                                      struct bnxt_re_ucontext,
1364                                                      ib_uctx);
1365         if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1366                 return -EFAULT;
1367
1368         bytes = (qplib_srq->max_wqe * BNXT_QPLIB_MAX_RQE_ENTRY_SIZE);
1369         bytes = PAGE_ALIGN(bytes);
1370         umem = ib_umem_get(context, ureq.srqva, bytes,
1371                            IB_ACCESS_LOCAL_WRITE, 1);
1372         if (IS_ERR(umem))
1373                 return PTR_ERR(umem);
1374
1375         srq->umem = umem;
1376         qplib_srq->nmap = umem->nmap;
1377         qplib_srq->sglist = umem->sg_head.sgl;
1378         qplib_srq->srq_handle = ureq.srq_handle;
1379         qplib_srq->dpi = &cntx->dpi;
1380
1381         return 0;
1382 }
1383
1384 struct ib_srq *bnxt_re_create_srq(struct ib_pd *ib_pd,
1385                                   struct ib_srq_init_attr *srq_init_attr,
1386                                   struct ib_udata *udata)
1387 {
1388         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
1389         struct bnxt_re_dev *rdev = pd->rdev;
1390         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
1391         struct bnxt_re_srq *srq;
1392         struct bnxt_qplib_nq *nq = NULL;
1393         int rc, entries;
1394
1395         if (srq_init_attr->attr.max_wr >= dev_attr->max_srq_wqes) {
1396                 dev_err(rdev_to_dev(rdev), "Create CQ failed - max exceeded");
1397                 rc = -EINVAL;
1398                 goto exit;
1399         }
1400
1401         if (srq_init_attr->srq_type != IB_SRQT_BASIC) {
1402                 rc = -EOPNOTSUPP;
1403                 goto exit;
1404         }
1405
1406         srq = kzalloc(sizeof(*srq), GFP_KERNEL);
1407         if (!srq) {
1408                 rc = -ENOMEM;
1409                 goto exit;
1410         }
1411         srq->rdev = rdev;
1412         srq->qplib_srq.pd = &pd->qplib_pd;
1413         srq->qplib_srq.dpi = &rdev->dpi_privileged;
1414         /* Allocate 1 more than what's provided so posting max doesn't
1415          * mean empty
1416          */
1417         entries = roundup_pow_of_two(srq_init_attr->attr.max_wr + 1);
1418         if (entries > dev_attr->max_srq_wqes + 1)
1419                 entries = dev_attr->max_srq_wqes + 1;
1420
1421         srq->qplib_srq.max_wqe = entries;
1422         srq->qplib_srq.max_sge = srq_init_attr->attr.max_sge;
1423         srq->qplib_srq.threshold = srq_init_attr->attr.srq_limit;
1424         srq->srq_limit = srq_init_attr->attr.srq_limit;
1425         srq->qplib_srq.eventq_hw_ring_id = rdev->nq[0].ring_id;
1426         nq = &rdev->nq[0];
1427
1428         if (udata) {
1429                 rc = bnxt_re_init_user_srq(rdev, pd, srq, udata);
1430                 if (rc)
1431                         goto fail;
1432         }
1433
1434         rc = bnxt_qplib_create_srq(&rdev->qplib_res, &srq->qplib_srq);
1435         if (rc) {
1436                 dev_err(rdev_to_dev(rdev), "Create HW SRQ failed!");
1437                 goto fail;
1438         }
1439
1440         if (udata) {
1441                 struct bnxt_re_srq_resp resp;
1442
1443                 resp.srqid = srq->qplib_srq.id;
1444                 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
1445                 if (rc) {
1446                         dev_err(rdev_to_dev(rdev), "SRQ copy to udata failed!");
1447                         bnxt_qplib_destroy_srq(&rdev->qplib_res,
1448                                                &srq->qplib_srq);
1449                         goto fail;
1450                 }
1451         }
1452         if (nq)
1453                 nq->budget++;
1454         atomic_inc(&rdev->srq_count);
1455
1456         return &srq->ib_srq;
1457
1458 fail:
1459         if (srq->umem)
1460                 ib_umem_release(srq->umem);
1461         kfree(srq);
1462 exit:
1463         return ERR_PTR(rc);
1464 }
1465
1466 int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
1467                        enum ib_srq_attr_mask srq_attr_mask,
1468                        struct ib_udata *udata)
1469 {
1470         struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1471                                                ib_srq);
1472         struct bnxt_re_dev *rdev = srq->rdev;
1473         int rc;
1474
1475         switch (srq_attr_mask) {
1476         case IB_SRQ_MAX_WR:
1477                 /* SRQ resize is not supported */
1478                 break;
1479         case IB_SRQ_LIMIT:
1480                 /* Change the SRQ threshold */
1481                 if (srq_attr->srq_limit > srq->qplib_srq.max_wqe)
1482                         return -EINVAL;
1483
1484                 srq->qplib_srq.threshold = srq_attr->srq_limit;
1485                 rc = bnxt_qplib_modify_srq(&rdev->qplib_res, &srq->qplib_srq);
1486                 if (rc) {
1487                         dev_err(rdev_to_dev(rdev), "Modify HW SRQ failed!");
1488                         return rc;
1489                 }
1490                 /* On success, update the shadow */
1491                 srq->srq_limit = srq_attr->srq_limit;
1492                 /* No need to Build and send response back to udata */
1493                 break;
1494         default:
1495                 dev_err(rdev_to_dev(rdev),
1496                         "Unsupported srq_attr_mask 0x%x", srq_attr_mask);
1497                 return -EINVAL;
1498         }
1499         return 0;
1500 }
1501
1502 int bnxt_re_query_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr)
1503 {
1504         struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1505                                                ib_srq);
1506         struct bnxt_re_srq tsrq;
1507         struct bnxt_re_dev *rdev = srq->rdev;
1508         int rc;
1509
1510         /* Get live SRQ attr */
1511         tsrq.qplib_srq.id = srq->qplib_srq.id;
1512         rc = bnxt_qplib_query_srq(&rdev->qplib_res, &tsrq.qplib_srq);
1513         if (rc) {
1514                 dev_err(rdev_to_dev(rdev), "Query HW SRQ failed!");
1515                 return rc;
1516         }
1517         srq_attr->max_wr = srq->qplib_srq.max_wqe;
1518         srq_attr->max_sge = srq->qplib_srq.max_sge;
1519         srq_attr->srq_limit = tsrq.qplib_srq.threshold;
1520
1521         return 0;
1522 }
1523
1524 int bnxt_re_post_srq_recv(struct ib_srq *ib_srq, const struct ib_recv_wr *wr,
1525                           const struct ib_recv_wr **bad_wr)
1526 {
1527         struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1528                                                ib_srq);
1529         struct bnxt_qplib_swqe wqe;
1530         unsigned long flags;
1531         int rc = 0;
1532
1533         spin_lock_irqsave(&srq->lock, flags);
1534         while (wr) {
1535                 /* Transcribe each ib_recv_wr to qplib_swqe */
1536                 wqe.num_sge = wr->num_sge;
1537                 bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
1538                 wqe.wr_id = wr->wr_id;
1539                 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
1540
1541                 rc = bnxt_qplib_post_srq_recv(&srq->qplib_srq, &wqe);
1542                 if (rc) {
1543                         *bad_wr = wr;
1544                         break;
1545                 }
1546                 wr = wr->next;
1547         }
1548         spin_unlock_irqrestore(&srq->lock, flags);
1549
1550         return rc;
1551 }
1552 static int bnxt_re_modify_shadow_qp(struct bnxt_re_dev *rdev,
1553                                     struct bnxt_re_qp *qp1_qp,
1554                                     int qp_attr_mask)
1555 {
1556         struct bnxt_re_qp *qp = rdev->qp1_sqp;
1557         int rc = 0;
1558
1559         if (qp_attr_mask & IB_QP_STATE) {
1560                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
1561                 qp->qplib_qp.state = qp1_qp->qplib_qp.state;
1562         }
1563         if (qp_attr_mask & IB_QP_PKEY_INDEX) {
1564                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
1565                 qp->qplib_qp.pkey_index = qp1_qp->qplib_qp.pkey_index;
1566         }
1567
1568         if (qp_attr_mask & IB_QP_QKEY) {
1569                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
1570                 /* Using a Random  QKEY */
1571                 qp->qplib_qp.qkey = 0x81818181;
1572         }
1573         if (qp_attr_mask & IB_QP_SQ_PSN) {
1574                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
1575                 qp->qplib_qp.sq.psn = qp1_qp->qplib_qp.sq.psn;
1576         }
1577
1578         rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
1579         if (rc)
1580                 dev_err(rdev_to_dev(rdev),
1581                         "Failed to modify Shadow QP for QP1");
1582         return rc;
1583 }
1584
1585 int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
1586                       int qp_attr_mask, struct ib_udata *udata)
1587 {
1588         struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
1589         struct bnxt_re_dev *rdev = qp->rdev;
1590         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
1591         enum ib_qp_state curr_qp_state, new_qp_state;
1592         int rc, entries;
1593         unsigned int flags;
1594         u8 nw_type;
1595
1596         qp->qplib_qp.modify_flags = 0;
1597         if (qp_attr_mask & IB_QP_STATE) {
1598                 curr_qp_state = __to_ib_qp_state(qp->qplib_qp.cur_qp_state);
1599                 new_qp_state = qp_attr->qp_state;
1600                 if (!ib_modify_qp_is_ok(curr_qp_state, new_qp_state,
1601                                         ib_qp->qp_type, qp_attr_mask,
1602                                         IB_LINK_LAYER_ETHERNET)) {
1603                         dev_err(rdev_to_dev(rdev),
1604                                 "Invalid attribute mask: %#x specified ",
1605                                 qp_attr_mask);
1606                         dev_err(rdev_to_dev(rdev),
1607                                 "for qpn: %#x type: %#x",
1608                                 ib_qp->qp_num, ib_qp->qp_type);
1609                         dev_err(rdev_to_dev(rdev),
1610                                 "curr_qp_state=0x%x, new_qp_state=0x%x\n",
1611                                 curr_qp_state, new_qp_state);
1612                         return -EINVAL;
1613                 }
1614                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
1615                 qp->qplib_qp.state = __from_ib_qp_state(qp_attr->qp_state);
1616
1617                 if (!qp->sumem &&
1618                     qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1619                         dev_dbg(rdev_to_dev(rdev),
1620                                 "Move QP = %p to flush list\n",
1621                                 qp);
1622                         flags = bnxt_re_lock_cqs(qp);
1623                         bnxt_qplib_add_flush_qp(&qp->qplib_qp);
1624                         bnxt_re_unlock_cqs(qp, flags);
1625                 }
1626                 if (!qp->sumem &&
1627                     qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_RESET) {
1628                         dev_dbg(rdev_to_dev(rdev),
1629                                 "Move QP = %p out of flush list\n",
1630                                 qp);
1631                         flags = bnxt_re_lock_cqs(qp);
1632                         bnxt_qplib_clean_qp(&qp->qplib_qp);
1633                         bnxt_re_unlock_cqs(qp, flags);
1634                 }
1635         }
1636         if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
1637                 qp->qplib_qp.modify_flags |=
1638                                 CMDQ_MODIFY_QP_MODIFY_MASK_EN_SQD_ASYNC_NOTIFY;
1639                 qp->qplib_qp.en_sqd_async_notify = true;
1640         }
1641         if (qp_attr_mask & IB_QP_ACCESS_FLAGS) {
1642                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_ACCESS;
1643                 qp->qplib_qp.access =
1644                         __from_ib_access_flags(qp_attr->qp_access_flags);
1645                 /* LOCAL_WRITE access must be set to allow RC receive */
1646                 qp->qplib_qp.access |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
1647         }
1648         if (qp_attr_mask & IB_QP_PKEY_INDEX) {
1649                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
1650                 qp->qplib_qp.pkey_index = qp_attr->pkey_index;
1651         }
1652         if (qp_attr_mask & IB_QP_QKEY) {
1653                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
1654                 qp->qplib_qp.qkey = qp_attr->qkey;
1655         }
1656         if (qp_attr_mask & IB_QP_AV) {
1657                 const struct ib_global_route *grh =
1658                         rdma_ah_read_grh(&qp_attr->ah_attr);
1659                 const struct ib_gid_attr *sgid_attr;
1660
1661                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_DGID |
1662                                      CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL |
1663                                      CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX |
1664                                      CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT |
1665                                      CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS |
1666                                      CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC |
1667                                      CMDQ_MODIFY_QP_MODIFY_MASK_VLAN_ID;
1668                 memcpy(qp->qplib_qp.ah.dgid.data, grh->dgid.raw,
1669                        sizeof(qp->qplib_qp.ah.dgid.data));
1670                 qp->qplib_qp.ah.flow_label = grh->flow_label;
1671                 /* If RoCE V2 is enabled, stack will have two entries for
1672                  * each GID entry. Avoiding this duplicte entry in HW. Dividing
1673                  * the GID index by 2 for RoCE V2
1674                  */
1675                 qp->qplib_qp.ah.sgid_index = grh->sgid_index / 2;
1676                 qp->qplib_qp.ah.host_sgid_index = grh->sgid_index;
1677                 qp->qplib_qp.ah.hop_limit = grh->hop_limit;
1678                 qp->qplib_qp.ah.traffic_class = grh->traffic_class;
1679                 qp->qplib_qp.ah.sl = rdma_ah_get_sl(&qp_attr->ah_attr);
1680                 ether_addr_copy(qp->qplib_qp.ah.dmac,
1681                                 qp_attr->ah_attr.roce.dmac);
1682
1683                 sgid_attr = qp_attr->ah_attr.grh.sgid_attr;
1684                 memcpy(qp->qplib_qp.smac, sgid_attr->ndev->dev_addr,
1685                        ETH_ALEN);
1686                 nw_type = rdma_gid_attr_network_type(sgid_attr);
1687                 switch (nw_type) {
1688                 case RDMA_NETWORK_IPV4:
1689                         qp->qplib_qp.nw_type =
1690                                 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV4;
1691                         break;
1692                 case RDMA_NETWORK_IPV6:
1693                         qp->qplib_qp.nw_type =
1694                                 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV6;
1695                         break;
1696                 default:
1697                         qp->qplib_qp.nw_type =
1698                                 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV1;
1699                         break;
1700                 }
1701         }
1702
1703         if (qp_attr_mask & IB_QP_PATH_MTU) {
1704                 qp->qplib_qp.modify_flags |=
1705                                 CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
1706                 qp->qplib_qp.path_mtu = __from_ib_mtu(qp_attr->path_mtu);
1707                 qp->qplib_qp.mtu = ib_mtu_enum_to_int(qp_attr->path_mtu);
1708         } else if (qp_attr->qp_state == IB_QPS_RTR) {
1709                 qp->qplib_qp.modify_flags |=
1710                         CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
1711                 qp->qplib_qp.path_mtu =
1712                         __from_ib_mtu(iboe_get_mtu(rdev->netdev->mtu));
1713                 qp->qplib_qp.mtu =
1714                         ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
1715         }
1716
1717         if (qp_attr_mask & IB_QP_TIMEOUT) {
1718                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_TIMEOUT;
1719                 qp->qplib_qp.timeout = qp_attr->timeout;
1720         }
1721         if (qp_attr_mask & IB_QP_RETRY_CNT) {
1722                 qp->qplib_qp.modify_flags |=
1723                                 CMDQ_MODIFY_QP_MODIFY_MASK_RETRY_CNT;
1724                 qp->qplib_qp.retry_cnt = qp_attr->retry_cnt;
1725         }
1726         if (qp_attr_mask & IB_QP_RNR_RETRY) {
1727                 qp->qplib_qp.modify_flags |=
1728                                 CMDQ_MODIFY_QP_MODIFY_MASK_RNR_RETRY;
1729                 qp->qplib_qp.rnr_retry = qp_attr->rnr_retry;
1730         }
1731         if (qp_attr_mask & IB_QP_MIN_RNR_TIMER) {
1732                 qp->qplib_qp.modify_flags |=
1733                                 CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER;
1734                 qp->qplib_qp.min_rnr_timer = qp_attr->min_rnr_timer;
1735         }
1736         if (qp_attr_mask & IB_QP_RQ_PSN) {
1737                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN;
1738                 qp->qplib_qp.rq.psn = qp_attr->rq_psn;
1739         }
1740         if (qp_attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1741                 qp->qplib_qp.modify_flags |=
1742                                 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_RD_ATOMIC;
1743                 /* Cap the max_rd_atomic to device max */
1744                 qp->qplib_qp.max_rd_atomic = min_t(u32, qp_attr->max_rd_atomic,
1745                                                    dev_attr->max_qp_rd_atom);
1746         }
1747         if (qp_attr_mask & IB_QP_SQ_PSN) {
1748                 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
1749                 qp->qplib_qp.sq.psn = qp_attr->sq_psn;
1750         }
1751         if (qp_attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1752                 if (qp_attr->max_dest_rd_atomic >
1753                     dev_attr->max_qp_init_rd_atom) {
1754                         dev_err(rdev_to_dev(rdev),
1755                                 "max_dest_rd_atomic requested%d is > dev_max%d",
1756                                 qp_attr->max_dest_rd_atomic,
1757                                 dev_attr->max_qp_init_rd_atom);
1758                         return -EINVAL;
1759                 }
1760
1761                 qp->qplib_qp.modify_flags |=
1762                                 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC;
1763                 qp->qplib_qp.max_dest_rd_atomic = qp_attr->max_dest_rd_atomic;
1764         }
1765         if (qp_attr_mask & IB_QP_CAP) {
1766                 qp->qplib_qp.modify_flags |=
1767                                 CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SIZE |
1768                                 CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SIZE |
1769                                 CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SGE |
1770                                 CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SGE |
1771                                 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_INLINE_DATA;
1772                 if ((qp_attr->cap.max_send_wr >= dev_attr->max_qp_wqes) ||
1773                     (qp_attr->cap.max_recv_wr >= dev_attr->max_qp_wqes) ||
1774                     (qp_attr->cap.max_send_sge >= dev_attr->max_qp_sges) ||
1775                     (qp_attr->cap.max_recv_sge >= dev_attr->max_qp_sges) ||
1776                     (qp_attr->cap.max_inline_data >=
1777                                                 dev_attr->max_inline_data)) {
1778                         dev_err(rdev_to_dev(rdev),
1779                                 "Create QP failed - max exceeded");
1780                         return -EINVAL;
1781                 }
1782                 entries = roundup_pow_of_two(qp_attr->cap.max_send_wr);
1783                 qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
1784                                                 dev_attr->max_qp_wqes + 1);
1785                 qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
1786                                                 qp_attr->cap.max_send_wr;
1787                 /*
1788                  * Reserving one slot for Phantom WQE. Some application can
1789                  * post one extra entry in this case. Allowing this to avoid
1790                  * unexpected Queue full condition
1791                  */
1792                 qp->qplib_qp.sq.q_full_delta -= 1;
1793                 qp->qplib_qp.sq.max_sge = qp_attr->cap.max_send_sge;
1794                 if (qp->qplib_qp.rq.max_wqe) {
1795                         entries = roundup_pow_of_two(qp_attr->cap.max_recv_wr);
1796                         qp->qplib_qp.rq.max_wqe =
1797                                 min_t(u32, entries, dev_attr->max_qp_wqes + 1);
1798                         qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
1799                                                        qp_attr->cap.max_recv_wr;
1800                         qp->qplib_qp.rq.max_sge = qp_attr->cap.max_recv_sge;
1801                 } else {
1802                         /* SRQ was used prior, just ignore the RQ caps */
1803                 }
1804         }
1805         if (qp_attr_mask & IB_QP_DEST_QPN) {
1806                 qp->qplib_qp.modify_flags |=
1807                                 CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID;
1808                 qp->qplib_qp.dest_qpn = qp_attr->dest_qp_num;
1809         }
1810         rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
1811         if (rc) {
1812                 dev_err(rdev_to_dev(rdev), "Failed to modify HW QP");
1813                 return rc;
1814         }
1815         if (ib_qp->qp_type == IB_QPT_GSI && rdev->qp1_sqp)
1816                 rc = bnxt_re_modify_shadow_qp(rdev, qp, qp_attr_mask);
1817         return rc;
1818 }
1819
1820 int bnxt_re_query_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
1821                      int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1822 {
1823         struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
1824         struct bnxt_re_dev *rdev = qp->rdev;
1825         struct bnxt_qplib_qp *qplib_qp;
1826         int rc;
1827
1828         qplib_qp = kzalloc(sizeof(*qplib_qp), GFP_KERNEL);
1829         if (!qplib_qp)
1830                 return -ENOMEM;
1831
1832         qplib_qp->id = qp->qplib_qp.id;
1833         qplib_qp->ah.host_sgid_index = qp->qplib_qp.ah.host_sgid_index;
1834
1835         rc = bnxt_qplib_query_qp(&rdev->qplib_res, qplib_qp);
1836         if (rc) {
1837                 dev_err(rdev_to_dev(rdev), "Failed to query HW QP");
1838                 goto out;
1839         }
1840         qp_attr->qp_state = __to_ib_qp_state(qplib_qp->state);
1841         qp_attr->cur_qp_state = __to_ib_qp_state(qplib_qp->cur_qp_state);
1842         qp_attr->en_sqd_async_notify = qplib_qp->en_sqd_async_notify ? 1 : 0;
1843         qp_attr->qp_access_flags = __to_ib_access_flags(qplib_qp->access);
1844         qp_attr->pkey_index = qplib_qp->pkey_index;
1845         qp_attr->qkey = qplib_qp->qkey;
1846         qp_attr->ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE;
1847         rdma_ah_set_grh(&qp_attr->ah_attr, NULL, qplib_qp->ah.flow_label,
1848                         qplib_qp->ah.host_sgid_index,
1849                         qplib_qp->ah.hop_limit,
1850                         qplib_qp->ah.traffic_class);
1851         rdma_ah_set_dgid_raw(&qp_attr->ah_attr, qplib_qp->ah.dgid.data);
1852         rdma_ah_set_sl(&qp_attr->ah_attr, qplib_qp->ah.sl);
1853         ether_addr_copy(qp_attr->ah_attr.roce.dmac, qplib_qp->ah.dmac);
1854         qp_attr->path_mtu = __to_ib_mtu(qplib_qp->path_mtu);
1855         qp_attr->timeout = qplib_qp->timeout;
1856         qp_attr->retry_cnt = qplib_qp->retry_cnt;
1857         qp_attr->rnr_retry = qplib_qp->rnr_retry;
1858         qp_attr->min_rnr_timer = qplib_qp->min_rnr_timer;
1859         qp_attr->rq_psn = qplib_qp->rq.psn;
1860         qp_attr->max_rd_atomic = qplib_qp->max_rd_atomic;
1861         qp_attr->sq_psn = qplib_qp->sq.psn;
1862         qp_attr->max_dest_rd_atomic = qplib_qp->max_dest_rd_atomic;
1863         qp_init_attr->sq_sig_type = qplib_qp->sig_type ? IB_SIGNAL_ALL_WR :
1864                                                          IB_SIGNAL_REQ_WR;
1865         qp_attr->dest_qp_num = qplib_qp->dest_qpn;
1866
1867         qp_attr->cap.max_send_wr = qp->qplib_qp.sq.max_wqe;
1868         qp_attr->cap.max_send_sge = qp->qplib_qp.sq.max_sge;
1869         qp_attr->cap.max_recv_wr = qp->qplib_qp.rq.max_wqe;
1870         qp_attr->cap.max_recv_sge = qp->qplib_qp.rq.max_sge;
1871         qp_attr->cap.max_inline_data = qp->qplib_qp.max_inline_data;
1872         qp_init_attr->cap = qp_attr->cap;
1873
1874 out:
1875         kfree(qplib_qp);
1876         return rc;
1877 }
1878
1879 /* Routine for sending QP1 packets for RoCE V1 an V2
1880  */
1881 static int bnxt_re_build_qp1_send_v2(struct bnxt_re_qp *qp,
1882                                      const struct ib_send_wr *wr,
1883                                      struct bnxt_qplib_swqe *wqe,
1884                                      int payload_size)
1885 {
1886         struct bnxt_re_ah *ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah,
1887                                              ib_ah);
1888         struct bnxt_qplib_ah *qplib_ah = &ah->qplib_ah;
1889         const struct ib_gid_attr *sgid_attr = ah->ib_ah.sgid_attr;
1890         struct bnxt_qplib_sge sge;
1891         u8 nw_type;
1892         u16 ether_type;
1893         union ib_gid dgid;
1894         bool is_eth = false;
1895         bool is_vlan = false;
1896         bool is_grh = false;
1897         bool is_udp = false;
1898         u8 ip_version = 0;
1899         u16 vlan_id = 0xFFFF;
1900         void *buf;
1901         int i, rc = 0;
1902
1903         memset(&qp->qp1_hdr, 0, sizeof(qp->qp1_hdr));
1904
1905         if (is_vlan_dev(sgid_attr->ndev))
1906                 vlan_id = vlan_dev_vlan_id(sgid_attr->ndev);
1907         /* Get network header type for this GID */
1908         nw_type = rdma_gid_attr_network_type(sgid_attr);
1909         switch (nw_type) {
1910         case RDMA_NETWORK_IPV4:
1911                 nw_type = BNXT_RE_ROCEV2_IPV4_PACKET;
1912                 break;
1913         case RDMA_NETWORK_IPV6:
1914                 nw_type = BNXT_RE_ROCEV2_IPV6_PACKET;
1915                 break;
1916         default:
1917                 nw_type = BNXT_RE_ROCE_V1_PACKET;
1918                 break;
1919         }
1920         memcpy(&dgid.raw, &qplib_ah->dgid, 16);
1921         is_udp = sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP;
1922         if (is_udp) {
1923                 if (ipv6_addr_v4mapped((struct in6_addr *)&sgid_attr->gid)) {
1924                         ip_version = 4;
1925                         ether_type = ETH_P_IP;
1926                 } else {
1927                         ip_version = 6;
1928                         ether_type = ETH_P_IPV6;
1929                 }
1930                 is_grh = false;
1931         } else {
1932                 ether_type = ETH_P_IBOE;
1933                 is_grh = true;
1934         }
1935
1936         is_eth = true;
1937         is_vlan = (vlan_id && (vlan_id < 0x1000)) ? true : false;
1938
1939         ib_ud_header_init(payload_size, !is_eth, is_eth, is_vlan, is_grh,
1940                           ip_version, is_udp, 0, &qp->qp1_hdr);
1941
1942         /* ETH */
1943         ether_addr_copy(qp->qp1_hdr.eth.dmac_h, ah->qplib_ah.dmac);
1944         ether_addr_copy(qp->qp1_hdr.eth.smac_h, qp->qplib_qp.smac);
1945
1946         /* For vlan, check the sgid for vlan existence */
1947
1948         if (!is_vlan) {
1949                 qp->qp1_hdr.eth.type = cpu_to_be16(ether_type);
1950         } else {
1951                 qp->qp1_hdr.vlan.type = cpu_to_be16(ether_type);
1952                 qp->qp1_hdr.vlan.tag = cpu_to_be16(vlan_id);
1953         }
1954
1955         if (is_grh || (ip_version == 6)) {
1956                 memcpy(qp->qp1_hdr.grh.source_gid.raw, sgid_attr->gid.raw,
1957                        sizeof(sgid_attr->gid));
1958                 memcpy(qp->qp1_hdr.grh.destination_gid.raw, qplib_ah->dgid.data,
1959                        sizeof(sgid_attr->gid));
1960                 qp->qp1_hdr.grh.hop_limit     = qplib_ah->hop_limit;
1961         }
1962
1963         if (ip_version == 4) {
1964                 qp->qp1_hdr.ip4.tos = 0;
1965                 qp->qp1_hdr.ip4.id = 0;
1966                 qp->qp1_hdr.ip4.frag_off = htons(IP_DF);
1967                 qp->qp1_hdr.ip4.ttl = qplib_ah->hop_limit;
1968
1969                 memcpy(&qp->qp1_hdr.ip4.saddr, sgid_attr->gid.raw + 12, 4);
1970                 memcpy(&qp->qp1_hdr.ip4.daddr, qplib_ah->dgid.data + 12, 4);
1971                 qp->qp1_hdr.ip4.check = ib_ud_ip4_csum(&qp->qp1_hdr);
1972         }
1973
1974         if (is_udp) {
1975                 qp->qp1_hdr.udp.dport = htons(ROCE_V2_UDP_DPORT);
1976                 qp->qp1_hdr.udp.sport = htons(0x8CD1);
1977                 qp->qp1_hdr.udp.csum = 0;
1978         }
1979
1980         /* BTH */
1981         if (wr->opcode == IB_WR_SEND_WITH_IMM) {
1982                 qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1983                 qp->qp1_hdr.immediate_present = 1;
1984         } else {
1985                 qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1986         }
1987         if (wr->send_flags & IB_SEND_SOLICITED)
1988                 qp->qp1_hdr.bth.solicited_event = 1;
1989         /* pad_count */
1990         qp->qp1_hdr.bth.pad_count = (4 - payload_size) & 3;
1991
1992         /* P_key for QP1 is for all members */
1993         qp->qp1_hdr.bth.pkey = cpu_to_be16(0xFFFF);
1994         qp->qp1_hdr.bth.destination_qpn = IB_QP1;
1995         qp->qp1_hdr.bth.ack_req = 0;
1996         qp->send_psn++;
1997         qp->send_psn &= BTH_PSN_MASK;
1998         qp->qp1_hdr.bth.psn = cpu_to_be32(qp->send_psn);
1999         /* DETH */
2000         /* Use the priviledged Q_Key for QP1 */
2001         qp->qp1_hdr.deth.qkey = cpu_to_be32(IB_QP1_QKEY);
2002         qp->qp1_hdr.deth.source_qpn = IB_QP1;
2003
2004         /* Pack the QP1 to the transmit buffer */
2005         buf = bnxt_qplib_get_qp1_sq_buf(&qp->qplib_qp, &sge);
2006         if (buf) {
2007                 ib_ud_header_pack(&qp->qp1_hdr, buf);
2008                 for (i = wqe->num_sge; i; i--) {
2009                         wqe->sg_list[i].addr = wqe->sg_list[i - 1].addr;
2010                         wqe->sg_list[i].lkey = wqe->sg_list[i - 1].lkey;
2011                         wqe->sg_list[i].size = wqe->sg_list[i - 1].size;
2012                 }
2013
2014                 /*
2015                  * Max Header buf size for IPV6 RoCE V2 is 86,
2016                  * which is same as the QP1 SQ header buffer.
2017                  * Header buf size for IPV4 RoCE V2 can be 66.
2018                  * ETH(14) + VLAN(4)+ IP(20) + UDP (8) + BTH(20).
2019                  * Subtract 20 bytes from QP1 SQ header buf size
2020                  */
2021                 if (is_udp && ip_version == 4)
2022                         sge.size -= 20;
2023                 /*
2024                  * Max Header buf size for RoCE V1 is 78.
2025                  * ETH(14) + VLAN(4) + GRH(40) + BTH(20).
2026                  * Subtract 8 bytes from QP1 SQ header buf size
2027                  */
2028                 if (!is_udp)
2029                         sge.size -= 8;
2030
2031                 /* Subtract 4 bytes for non vlan packets */
2032                 if (!is_vlan)
2033                         sge.size -= 4;
2034
2035                 wqe->sg_list[0].addr = sge.addr;
2036                 wqe->sg_list[0].lkey = sge.lkey;
2037                 wqe->sg_list[0].size = sge.size;
2038                 wqe->num_sge++;
2039
2040         } else {
2041                 dev_err(rdev_to_dev(qp->rdev), "QP1 buffer is empty!");
2042                 rc = -ENOMEM;
2043         }
2044         return rc;
2045 }
2046
2047 /* For the MAD layer, it only provides the recv SGE the size of
2048  * ib_grh + MAD datagram.  No Ethernet headers, Ethertype, BTH, DETH,
2049  * nor RoCE iCRC.  The Cu+ solution must provide buffer for the entire
2050  * receive packet (334 bytes) with no VLAN and then copy the GRH
2051  * and the MAD datagram out to the provided SGE.
2052  */
2053 static int bnxt_re_build_qp1_shadow_qp_recv(struct bnxt_re_qp *qp,
2054                                             const struct ib_recv_wr *wr,
2055                                             struct bnxt_qplib_swqe *wqe,
2056                                             int payload_size)
2057 {
2058         struct bnxt_qplib_sge ref, sge;
2059         u32 rq_prod_index;
2060         struct bnxt_re_sqp_entries *sqp_entry;
2061
2062         rq_prod_index = bnxt_qplib_get_rq_prod_index(&qp->qplib_qp);
2063
2064         if (!bnxt_qplib_get_qp1_rq_buf(&qp->qplib_qp, &sge))
2065                 return -ENOMEM;
2066
2067         /* Create 1 SGE to receive the entire
2068          * ethernet packet
2069          */
2070         /* Save the reference from ULP */
2071         ref.addr = wqe->sg_list[0].addr;
2072         ref.lkey = wqe->sg_list[0].lkey;
2073         ref.size = wqe->sg_list[0].size;
2074
2075         sqp_entry = &qp->rdev->sqp_tbl[rq_prod_index];
2076
2077         /* SGE 1 */
2078         wqe->sg_list[0].addr = sge.addr;
2079         wqe->sg_list[0].lkey = sge.lkey;
2080         wqe->sg_list[0].size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
2081         sge.size -= wqe->sg_list[0].size;
2082
2083         sqp_entry->sge.addr = ref.addr;
2084         sqp_entry->sge.lkey = ref.lkey;
2085         sqp_entry->sge.size = ref.size;
2086         /* Store the wrid for reporting completion */
2087         sqp_entry->wrid = wqe->wr_id;
2088         /* change the wqe->wrid to table index */
2089         wqe->wr_id = rq_prod_index;
2090         return 0;
2091 }
2092
2093 static int is_ud_qp(struct bnxt_re_qp *qp)
2094 {
2095         return qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_UD;
2096 }
2097
2098 static int bnxt_re_build_send_wqe(struct bnxt_re_qp *qp,
2099                                   const struct ib_send_wr *wr,
2100                                   struct bnxt_qplib_swqe *wqe)
2101 {
2102         struct bnxt_re_ah *ah = NULL;
2103
2104         if (is_ud_qp(qp)) {
2105                 ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah, ib_ah);
2106                 wqe->send.q_key = ud_wr(wr)->remote_qkey;
2107                 wqe->send.dst_qp = ud_wr(wr)->remote_qpn;
2108                 wqe->send.avid = ah->qplib_ah.id;
2109         }
2110         switch (wr->opcode) {
2111         case IB_WR_SEND:
2112                 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND;
2113                 break;
2114         case IB_WR_SEND_WITH_IMM:
2115                 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM;
2116                 wqe->send.imm_data = wr->ex.imm_data;
2117                 break;
2118         case IB_WR_SEND_WITH_INV:
2119                 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV;
2120                 wqe->send.inv_key = wr->ex.invalidate_rkey;
2121                 break;
2122         default:
2123                 return -EINVAL;
2124         }
2125         if (wr->send_flags & IB_SEND_SIGNALED)
2126                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2127         if (wr->send_flags & IB_SEND_FENCE)
2128                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2129         if (wr->send_flags & IB_SEND_SOLICITED)
2130                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2131         if (wr->send_flags & IB_SEND_INLINE)
2132                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
2133
2134         return 0;
2135 }
2136
2137 static int bnxt_re_build_rdma_wqe(const struct ib_send_wr *wr,
2138                                   struct bnxt_qplib_swqe *wqe)
2139 {
2140         switch (wr->opcode) {
2141         case IB_WR_RDMA_WRITE:
2142                 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE;
2143                 break;
2144         case IB_WR_RDMA_WRITE_WITH_IMM:
2145                 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM;
2146                 wqe->rdma.imm_data = wr->ex.imm_data;
2147                 break;
2148         case IB_WR_RDMA_READ:
2149                 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_READ;
2150                 wqe->rdma.inv_key = wr->ex.invalidate_rkey;
2151                 break;
2152         default:
2153                 return -EINVAL;
2154         }
2155         wqe->rdma.remote_va = rdma_wr(wr)->remote_addr;
2156         wqe->rdma.r_key = rdma_wr(wr)->rkey;
2157         if (wr->send_flags & IB_SEND_SIGNALED)
2158                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2159         if (wr->send_flags & IB_SEND_FENCE)
2160                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2161         if (wr->send_flags & IB_SEND_SOLICITED)
2162                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2163         if (wr->send_flags & IB_SEND_INLINE)
2164                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
2165
2166         return 0;
2167 }
2168
2169 static int bnxt_re_build_atomic_wqe(const struct ib_send_wr *wr,
2170                                     struct bnxt_qplib_swqe *wqe)
2171 {
2172         switch (wr->opcode) {
2173         case IB_WR_ATOMIC_CMP_AND_SWP:
2174                 wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP;
2175                 wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
2176                 wqe->atomic.swap_data = atomic_wr(wr)->swap;
2177                 break;
2178         case IB_WR_ATOMIC_FETCH_AND_ADD:
2179                 wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD;
2180                 wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
2181                 break;
2182         default:
2183                 return -EINVAL;
2184         }
2185         wqe->atomic.remote_va = atomic_wr(wr)->remote_addr;
2186         wqe->atomic.r_key = atomic_wr(wr)->rkey;
2187         if (wr->send_flags & IB_SEND_SIGNALED)
2188                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2189         if (wr->send_flags & IB_SEND_FENCE)
2190                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2191         if (wr->send_flags & IB_SEND_SOLICITED)
2192                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2193         return 0;
2194 }
2195
2196 static int bnxt_re_build_inv_wqe(const struct ib_send_wr *wr,
2197                                  struct bnxt_qplib_swqe *wqe)
2198 {
2199         wqe->type = BNXT_QPLIB_SWQE_TYPE_LOCAL_INV;
2200         wqe->local_inv.inv_l_key = wr->ex.invalidate_rkey;
2201
2202         /* Need unconditional fence for local invalidate
2203          * opcode to work as expected.
2204          */
2205         wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2206
2207         if (wr->send_flags & IB_SEND_SIGNALED)
2208                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2209         if (wr->send_flags & IB_SEND_SOLICITED)
2210                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2211
2212         return 0;
2213 }
2214
2215 static int bnxt_re_build_reg_wqe(const struct ib_reg_wr *wr,
2216                                  struct bnxt_qplib_swqe *wqe)
2217 {
2218         struct bnxt_re_mr *mr = container_of(wr->mr, struct bnxt_re_mr, ib_mr);
2219         struct bnxt_qplib_frpl *qplib_frpl = &mr->qplib_frpl;
2220         int access = wr->access;
2221
2222         wqe->frmr.pbl_ptr = (__le64 *)qplib_frpl->hwq.pbl_ptr[0];
2223         wqe->frmr.pbl_dma_ptr = qplib_frpl->hwq.pbl_dma_ptr[0];
2224         wqe->frmr.page_list = mr->pages;
2225         wqe->frmr.page_list_len = mr->npages;
2226         wqe->frmr.levels = qplib_frpl->hwq.level + 1;
2227         wqe->type = BNXT_QPLIB_SWQE_TYPE_REG_MR;
2228
2229         /* Need unconditional fence for reg_mr
2230          * opcode to function as expected.
2231          */
2232
2233         wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2234
2235         if (wr->wr.send_flags & IB_SEND_SIGNALED)
2236                 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2237
2238         if (access & IB_ACCESS_LOCAL_WRITE)
2239                 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_LOCAL_WRITE;
2240         if (access & IB_ACCESS_REMOTE_READ)
2241                 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_READ;
2242         if (access & IB_ACCESS_REMOTE_WRITE)
2243                 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_WRITE;
2244         if (access & IB_ACCESS_REMOTE_ATOMIC)
2245                 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_ATOMIC;
2246         if (access & IB_ACCESS_MW_BIND)
2247                 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_WINDOW_BIND;
2248
2249         wqe->frmr.l_key = wr->key;
2250         wqe->frmr.length = wr->mr->length;
2251         wqe->frmr.pbl_pg_sz_log = (wr->mr->page_size >> PAGE_SHIFT_4K) - 1;
2252         wqe->frmr.va = wr->mr->iova;
2253         return 0;
2254 }
2255
2256 static int bnxt_re_copy_inline_data(struct bnxt_re_dev *rdev,
2257                                     const struct ib_send_wr *wr,
2258                                     struct bnxt_qplib_swqe *wqe)
2259 {
2260         /*  Copy the inline data to the data  field */
2261         u8 *in_data;
2262         u32 i, sge_len;
2263         void *sge_addr;
2264
2265         in_data = wqe->inline_data;
2266         for (i = 0; i < wr->num_sge; i++) {
2267                 sge_addr = (void *)(unsigned long)
2268                                 wr->sg_list[i].addr;
2269                 sge_len = wr->sg_list[i].length;
2270
2271                 if ((sge_len + wqe->inline_len) >
2272                     BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH) {
2273                         dev_err(rdev_to_dev(rdev),
2274                                 "Inline data size requested > supported value");
2275                         return -EINVAL;
2276                 }
2277                 sge_len = wr->sg_list[i].length;
2278
2279                 memcpy(in_data, sge_addr, sge_len);
2280                 in_data += wr->sg_list[i].length;
2281                 wqe->inline_len += wr->sg_list[i].length;
2282         }
2283         return wqe->inline_len;
2284 }
2285
2286 static int bnxt_re_copy_wr_payload(struct bnxt_re_dev *rdev,
2287                                    const struct ib_send_wr *wr,
2288                                    struct bnxt_qplib_swqe *wqe)
2289 {
2290         int payload_sz = 0;
2291
2292         if (wr->send_flags & IB_SEND_INLINE)
2293                 payload_sz = bnxt_re_copy_inline_data(rdev, wr, wqe);
2294         else
2295                 payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe->sg_list,
2296                                                wqe->num_sge);
2297
2298         return payload_sz;
2299 }
2300
2301 static void bnxt_ud_qp_hw_stall_workaround(struct bnxt_re_qp *qp)
2302 {
2303         if ((qp->ib_qp.qp_type == IB_QPT_UD ||
2304              qp->ib_qp.qp_type == IB_QPT_GSI ||
2305              qp->ib_qp.qp_type == IB_QPT_RAW_ETHERTYPE) &&
2306              qp->qplib_qp.wqe_cnt == BNXT_RE_UD_QP_HW_STALL) {
2307                 int qp_attr_mask;
2308                 struct ib_qp_attr qp_attr;
2309
2310                 qp_attr_mask = IB_QP_STATE;
2311                 qp_attr.qp_state = IB_QPS_RTS;
2312                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, qp_attr_mask, NULL);
2313                 qp->qplib_qp.wqe_cnt = 0;
2314         }
2315 }
2316
2317 static int bnxt_re_post_send_shadow_qp(struct bnxt_re_dev *rdev,
2318                                        struct bnxt_re_qp *qp,
2319                                        const struct ib_send_wr *wr)
2320 {
2321         struct bnxt_qplib_swqe wqe;
2322         int rc = 0, payload_sz = 0;
2323         unsigned long flags;
2324
2325         spin_lock_irqsave(&qp->sq_lock, flags);
2326         memset(&wqe, 0, sizeof(wqe));
2327         while (wr) {
2328                 /* House keeping */
2329                 memset(&wqe, 0, sizeof(wqe));
2330
2331                 /* Common */
2332                 wqe.num_sge = wr->num_sge;
2333                 if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
2334                         dev_err(rdev_to_dev(rdev),
2335                                 "Limit exceeded for Send SGEs");
2336                         rc = -EINVAL;
2337                         goto bad;
2338                 }
2339
2340                 payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
2341                 if (payload_sz < 0) {
2342                         rc = -EINVAL;
2343                         goto bad;
2344                 }
2345                 wqe.wr_id = wr->wr_id;
2346
2347                 wqe.type = BNXT_QPLIB_SWQE_TYPE_SEND;
2348
2349                 rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
2350                 if (!rc)
2351                         rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
2352 bad:
2353                 if (rc) {
2354                         dev_err(rdev_to_dev(rdev),
2355                                 "Post send failed opcode = %#x rc = %d",
2356                                 wr->opcode, rc);
2357                         break;
2358                 }
2359                 wr = wr->next;
2360         }
2361         bnxt_qplib_post_send_db(&qp->qplib_qp);
2362         bnxt_ud_qp_hw_stall_workaround(qp);
2363         spin_unlock_irqrestore(&qp->sq_lock, flags);
2364         return rc;
2365 }
2366
2367 int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
2368                       const struct ib_send_wr **bad_wr)
2369 {
2370         struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
2371         struct bnxt_qplib_swqe wqe;
2372         int rc = 0, payload_sz = 0;
2373         unsigned long flags;
2374
2375         spin_lock_irqsave(&qp->sq_lock, flags);
2376         while (wr) {
2377                 /* House keeping */
2378                 memset(&wqe, 0, sizeof(wqe));
2379
2380                 /* Common */
2381                 wqe.num_sge = wr->num_sge;
2382                 if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
2383                         dev_err(rdev_to_dev(qp->rdev),
2384                                 "Limit exceeded for Send SGEs");
2385                         rc = -EINVAL;
2386                         goto bad;
2387                 }
2388
2389                 payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
2390                 if (payload_sz < 0) {
2391                         rc = -EINVAL;
2392                         goto bad;
2393                 }
2394                 wqe.wr_id = wr->wr_id;
2395
2396                 switch (wr->opcode) {
2397                 case IB_WR_SEND:
2398                 case IB_WR_SEND_WITH_IMM:
2399                         if (ib_qp->qp_type == IB_QPT_GSI) {
2400                                 rc = bnxt_re_build_qp1_send_v2(qp, wr, &wqe,
2401                                                                payload_sz);
2402                                 if (rc)
2403                                         goto bad;
2404                                 wqe.rawqp1.lflags |=
2405                                         SQ_SEND_RAWETH_QP1_LFLAGS_ROCE_CRC;
2406                         }
2407                         switch (wr->send_flags) {
2408                         case IB_SEND_IP_CSUM:
2409                                 wqe.rawqp1.lflags |=
2410                                         SQ_SEND_RAWETH_QP1_LFLAGS_IP_CHKSUM;
2411                                 break;
2412                         default:
2413                                 break;
2414                         }
2415                         /* fall through */
2416                 case IB_WR_SEND_WITH_INV:
2417                         rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
2418                         break;
2419                 case IB_WR_RDMA_WRITE:
2420                 case IB_WR_RDMA_WRITE_WITH_IMM:
2421                 case IB_WR_RDMA_READ:
2422                         rc = bnxt_re_build_rdma_wqe(wr, &wqe);
2423                         break;
2424                 case IB_WR_ATOMIC_CMP_AND_SWP:
2425                 case IB_WR_ATOMIC_FETCH_AND_ADD:
2426                         rc = bnxt_re_build_atomic_wqe(wr, &wqe);
2427                         break;
2428                 case IB_WR_RDMA_READ_WITH_INV:
2429                         dev_err(rdev_to_dev(qp->rdev),
2430                                 "RDMA Read with Invalidate is not supported");
2431                         rc = -EINVAL;
2432                         goto bad;
2433                 case IB_WR_LOCAL_INV:
2434                         rc = bnxt_re_build_inv_wqe(wr, &wqe);
2435                         break;
2436                 case IB_WR_REG_MR:
2437                         rc = bnxt_re_build_reg_wqe(reg_wr(wr), &wqe);
2438                         break;
2439                 default:
2440                         /* Unsupported WRs */
2441                         dev_err(rdev_to_dev(qp->rdev),
2442                                 "WR (%#x) is not supported", wr->opcode);
2443                         rc = -EINVAL;
2444                         goto bad;
2445                 }
2446                 if (!rc)
2447                         rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
2448 bad:
2449                 if (rc) {
2450                         dev_err(rdev_to_dev(qp->rdev),
2451                                 "post_send failed op:%#x qps = %#x rc = %d\n",
2452                                 wr->opcode, qp->qplib_qp.state, rc);
2453                         *bad_wr = wr;
2454                         break;
2455                 }
2456                 wr = wr->next;
2457         }
2458         bnxt_qplib_post_send_db(&qp->qplib_qp);
2459         bnxt_ud_qp_hw_stall_workaround(qp);
2460         spin_unlock_irqrestore(&qp->sq_lock, flags);
2461
2462         return rc;
2463 }
2464
2465 static int bnxt_re_post_recv_shadow_qp(struct bnxt_re_dev *rdev,
2466                                        struct bnxt_re_qp *qp,
2467                                        const struct ib_recv_wr *wr)
2468 {
2469         struct bnxt_qplib_swqe wqe;
2470         int rc = 0;
2471
2472         memset(&wqe, 0, sizeof(wqe));
2473         while (wr) {
2474                 /* House keeping */
2475                 memset(&wqe, 0, sizeof(wqe));
2476
2477                 /* Common */
2478                 wqe.num_sge = wr->num_sge;
2479                 if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
2480                         dev_err(rdev_to_dev(rdev),
2481                                 "Limit exceeded for Receive SGEs");
2482                         rc = -EINVAL;
2483                         break;
2484                 }
2485                 bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
2486                 wqe.wr_id = wr->wr_id;
2487                 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
2488
2489                 rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
2490                 if (rc)
2491                         break;
2492
2493                 wr = wr->next;
2494         }
2495         if (!rc)
2496                 bnxt_qplib_post_recv_db(&qp->qplib_qp);
2497         return rc;
2498 }
2499
2500 int bnxt_re_post_recv(struct ib_qp *ib_qp, const struct ib_recv_wr *wr,
2501                       const struct ib_recv_wr **bad_wr)
2502 {
2503         struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
2504         struct bnxt_qplib_swqe wqe;
2505         int rc = 0, payload_sz = 0;
2506         unsigned long flags;
2507         u32 count = 0;
2508
2509         spin_lock_irqsave(&qp->rq_lock, flags);
2510         while (wr) {
2511                 /* House keeping */
2512                 memset(&wqe, 0, sizeof(wqe));
2513
2514                 /* Common */
2515                 wqe.num_sge = wr->num_sge;
2516                 if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
2517                         dev_err(rdev_to_dev(qp->rdev),
2518                                 "Limit exceeded for Receive SGEs");
2519                         rc = -EINVAL;
2520                         *bad_wr = wr;
2521                         break;
2522                 }
2523
2524                 payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe.sg_list,
2525                                                wr->num_sge);
2526                 wqe.wr_id = wr->wr_id;
2527                 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
2528
2529                 if (ib_qp->qp_type == IB_QPT_GSI)
2530                         rc = bnxt_re_build_qp1_shadow_qp_recv(qp, wr, &wqe,
2531                                                               payload_sz);
2532                 if (!rc)
2533                         rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
2534                 if (rc) {
2535                         *bad_wr = wr;
2536                         break;
2537                 }
2538
2539                 /* Ring DB if the RQEs posted reaches a threshold value */
2540                 if (++count >= BNXT_RE_RQ_WQE_THRESHOLD) {
2541                         bnxt_qplib_post_recv_db(&qp->qplib_qp);
2542                         count = 0;
2543                 }
2544
2545                 wr = wr->next;
2546         }
2547
2548         if (count)
2549                 bnxt_qplib_post_recv_db(&qp->qplib_qp);
2550
2551         spin_unlock_irqrestore(&qp->rq_lock, flags);
2552
2553         return rc;
2554 }
2555
2556 /* Completion Queues */
2557 int bnxt_re_destroy_cq(struct ib_cq *ib_cq)
2558 {
2559         int rc;
2560         struct bnxt_re_cq *cq;
2561         struct bnxt_qplib_nq *nq;
2562         struct bnxt_re_dev *rdev;
2563
2564         cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
2565         rdev = cq->rdev;
2566         nq = cq->qplib_cq.nq;
2567
2568         rc = bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
2569         if (rc) {
2570                 dev_err(rdev_to_dev(rdev), "Failed to destroy HW CQ");
2571                 return rc;
2572         }
2573         if (!IS_ERR_OR_NULL(cq->umem))
2574                 ib_umem_release(cq->umem);
2575
2576         atomic_dec(&rdev->cq_count);
2577         nq->budget--;
2578         kfree(cq->cql);
2579         kfree(cq);
2580
2581         return 0;
2582 }
2583
2584 struct ib_cq *bnxt_re_create_cq(struct ib_device *ibdev,
2585                                 const struct ib_cq_init_attr *attr,
2586                                 struct ib_ucontext *context,
2587                                 struct ib_udata *udata)
2588 {
2589         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
2590         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
2591         struct bnxt_re_cq *cq = NULL;
2592         int rc, entries;
2593         int cqe = attr->cqe;
2594         struct bnxt_qplib_nq *nq = NULL;
2595         unsigned int nq_alloc_cnt;
2596
2597         /* Validate CQ fields */
2598         if (cqe < 1 || cqe > dev_attr->max_cq_wqes) {
2599                 dev_err(rdev_to_dev(rdev), "Failed to create CQ -max exceeded");
2600                 return ERR_PTR(-EINVAL);
2601         }
2602         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
2603         if (!cq)
2604                 return ERR_PTR(-ENOMEM);
2605
2606         cq->rdev = rdev;
2607         cq->qplib_cq.cq_handle = (u64)(unsigned long)(&cq->qplib_cq);
2608
2609         entries = roundup_pow_of_two(cqe + 1);
2610         if (entries > dev_attr->max_cq_wqes + 1)
2611                 entries = dev_attr->max_cq_wqes + 1;
2612
2613         if (context) {
2614                 struct bnxt_re_cq_req req;
2615                 struct bnxt_re_ucontext *uctx = container_of
2616                                                 (context,
2617                                                  struct bnxt_re_ucontext,
2618                                                  ib_uctx);
2619                 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2620                         rc = -EFAULT;
2621                         goto fail;
2622                 }
2623
2624                 cq->umem = ib_umem_get(context, req.cq_va,
2625                                        entries * sizeof(struct cq_base),
2626                                        IB_ACCESS_LOCAL_WRITE, 1);
2627                 if (IS_ERR(cq->umem)) {
2628                         rc = PTR_ERR(cq->umem);
2629                         goto fail;
2630                 }
2631                 cq->qplib_cq.sghead = cq->umem->sg_head.sgl;
2632                 cq->qplib_cq.nmap = cq->umem->nmap;
2633                 cq->qplib_cq.dpi = &uctx->dpi;
2634         } else {
2635                 cq->max_cql = min_t(u32, entries, MAX_CQL_PER_POLL);
2636                 cq->cql = kcalloc(cq->max_cql, sizeof(struct bnxt_qplib_cqe),
2637                                   GFP_KERNEL);
2638                 if (!cq->cql) {
2639                         rc = -ENOMEM;
2640                         goto fail;
2641                 }
2642
2643                 cq->qplib_cq.dpi = &rdev->dpi_privileged;
2644                 cq->qplib_cq.sghead = NULL;
2645                 cq->qplib_cq.nmap = 0;
2646         }
2647         /*
2648          * Allocating the NQ in a round robin fashion. nq_alloc_cnt is a
2649          * used for getting the NQ index.
2650          */
2651         nq_alloc_cnt = atomic_inc_return(&rdev->nq_alloc_cnt);
2652         nq = &rdev->nq[nq_alloc_cnt % (rdev->num_msix - 1)];
2653         cq->qplib_cq.max_wqe = entries;
2654         cq->qplib_cq.cnq_hw_ring_id = nq->ring_id;
2655         cq->qplib_cq.nq = nq;
2656
2657         rc = bnxt_qplib_create_cq(&rdev->qplib_res, &cq->qplib_cq);
2658         if (rc) {
2659                 dev_err(rdev_to_dev(rdev), "Failed to create HW CQ");
2660                 goto fail;
2661         }
2662
2663         cq->ib_cq.cqe = entries;
2664         cq->cq_period = cq->qplib_cq.period;
2665         nq->budget++;
2666
2667         atomic_inc(&rdev->cq_count);
2668         spin_lock_init(&cq->cq_lock);
2669
2670         if (context) {
2671                 struct bnxt_re_cq_resp resp;
2672
2673                 resp.cqid = cq->qplib_cq.id;
2674                 resp.tail = cq->qplib_cq.hwq.cons;
2675                 resp.phase = cq->qplib_cq.period;
2676                 resp.rsvd = 0;
2677                 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
2678                 if (rc) {
2679                         dev_err(rdev_to_dev(rdev), "Failed to copy CQ udata");
2680                         bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
2681                         goto c2fail;
2682                 }
2683         }
2684
2685         return &cq->ib_cq;
2686
2687 c2fail:
2688         if (context)
2689                 ib_umem_release(cq->umem);
2690 fail:
2691         kfree(cq->cql);
2692         kfree(cq);
2693         return ERR_PTR(rc);
2694 }
2695
2696 static u8 __req_to_ib_wc_status(u8 qstatus)
2697 {
2698         switch (qstatus) {
2699         case CQ_REQ_STATUS_OK:
2700                 return IB_WC_SUCCESS;
2701         case CQ_REQ_STATUS_BAD_RESPONSE_ERR:
2702                 return IB_WC_BAD_RESP_ERR;
2703         case CQ_REQ_STATUS_LOCAL_LENGTH_ERR:
2704                 return IB_WC_LOC_LEN_ERR;
2705         case CQ_REQ_STATUS_LOCAL_QP_OPERATION_ERR:
2706                 return IB_WC_LOC_QP_OP_ERR;
2707         case CQ_REQ_STATUS_LOCAL_PROTECTION_ERR:
2708                 return IB_WC_LOC_PROT_ERR;
2709         case CQ_REQ_STATUS_MEMORY_MGT_OPERATION_ERR:
2710                 return IB_WC_GENERAL_ERR;
2711         case CQ_REQ_STATUS_REMOTE_INVALID_REQUEST_ERR:
2712                 return IB_WC_REM_INV_REQ_ERR;
2713         case CQ_REQ_STATUS_REMOTE_ACCESS_ERR:
2714                 return IB_WC_REM_ACCESS_ERR;
2715         case CQ_REQ_STATUS_REMOTE_OPERATION_ERR:
2716                 return IB_WC_REM_OP_ERR;
2717         case CQ_REQ_STATUS_RNR_NAK_RETRY_CNT_ERR:
2718                 return IB_WC_RNR_RETRY_EXC_ERR;
2719         case CQ_REQ_STATUS_TRANSPORT_RETRY_CNT_ERR:
2720                 return IB_WC_RETRY_EXC_ERR;
2721         case CQ_REQ_STATUS_WORK_REQUEST_FLUSHED_ERR:
2722                 return IB_WC_WR_FLUSH_ERR;
2723         default:
2724                 return IB_WC_GENERAL_ERR;
2725         }
2726         return 0;
2727 }
2728
2729 static u8 __rawqp1_to_ib_wc_status(u8 qstatus)
2730 {
2731         switch (qstatus) {
2732         case CQ_RES_RAWETH_QP1_STATUS_OK:
2733                 return IB_WC_SUCCESS;
2734         case CQ_RES_RAWETH_QP1_STATUS_LOCAL_ACCESS_ERROR:
2735                 return IB_WC_LOC_ACCESS_ERR;
2736         case CQ_RES_RAWETH_QP1_STATUS_HW_LOCAL_LENGTH_ERR:
2737                 return IB_WC_LOC_LEN_ERR;
2738         case CQ_RES_RAWETH_QP1_STATUS_LOCAL_PROTECTION_ERR:
2739                 return IB_WC_LOC_PROT_ERR;
2740         case CQ_RES_RAWETH_QP1_STATUS_LOCAL_QP_OPERATION_ERR:
2741                 return IB_WC_LOC_QP_OP_ERR;
2742         case CQ_RES_RAWETH_QP1_STATUS_MEMORY_MGT_OPERATION_ERR:
2743                 return IB_WC_GENERAL_ERR;
2744         case CQ_RES_RAWETH_QP1_STATUS_WORK_REQUEST_FLUSHED_ERR:
2745                 return IB_WC_WR_FLUSH_ERR;
2746         case CQ_RES_RAWETH_QP1_STATUS_HW_FLUSH_ERR:
2747                 return IB_WC_WR_FLUSH_ERR;
2748         default:
2749                 return IB_WC_GENERAL_ERR;
2750         }
2751 }
2752
2753 static u8 __rc_to_ib_wc_status(u8 qstatus)
2754 {
2755         switch (qstatus) {
2756         case CQ_RES_RC_STATUS_OK:
2757                 return IB_WC_SUCCESS;
2758         case CQ_RES_RC_STATUS_LOCAL_ACCESS_ERROR:
2759                 return IB_WC_LOC_ACCESS_ERR;
2760         case CQ_RES_RC_STATUS_LOCAL_LENGTH_ERR:
2761                 return IB_WC_LOC_LEN_ERR;
2762         case CQ_RES_RC_STATUS_LOCAL_PROTECTION_ERR:
2763                 return IB_WC_LOC_PROT_ERR;
2764         case CQ_RES_RC_STATUS_LOCAL_QP_OPERATION_ERR:
2765                 return IB_WC_LOC_QP_OP_ERR;
2766         case CQ_RES_RC_STATUS_MEMORY_MGT_OPERATION_ERR:
2767                 return IB_WC_GENERAL_ERR;
2768         case CQ_RES_RC_STATUS_REMOTE_INVALID_REQUEST_ERR:
2769                 return IB_WC_REM_INV_REQ_ERR;
2770         case CQ_RES_RC_STATUS_WORK_REQUEST_FLUSHED_ERR:
2771                 return IB_WC_WR_FLUSH_ERR;
2772         case CQ_RES_RC_STATUS_HW_FLUSH_ERR:
2773                 return IB_WC_WR_FLUSH_ERR;
2774         default:
2775                 return IB_WC_GENERAL_ERR;
2776         }
2777 }
2778
2779 static void bnxt_re_process_req_wc(struct ib_wc *wc, struct bnxt_qplib_cqe *cqe)
2780 {
2781         switch (cqe->type) {
2782         case BNXT_QPLIB_SWQE_TYPE_SEND:
2783                 wc->opcode = IB_WC_SEND;
2784                 break;
2785         case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM:
2786                 wc->opcode = IB_WC_SEND;
2787                 wc->wc_flags |= IB_WC_WITH_IMM;
2788                 break;
2789         case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV:
2790                 wc->opcode = IB_WC_SEND;
2791                 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
2792                 break;
2793         case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE:
2794                 wc->opcode = IB_WC_RDMA_WRITE;
2795                 break;
2796         case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM:
2797                 wc->opcode = IB_WC_RDMA_WRITE;
2798                 wc->wc_flags |= IB_WC_WITH_IMM;
2799                 break;
2800         case BNXT_QPLIB_SWQE_TYPE_RDMA_READ:
2801                 wc->opcode = IB_WC_RDMA_READ;
2802                 break;
2803         case BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP:
2804                 wc->opcode = IB_WC_COMP_SWAP;
2805                 break;
2806         case BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD:
2807                 wc->opcode = IB_WC_FETCH_ADD;
2808                 break;
2809         case BNXT_QPLIB_SWQE_TYPE_LOCAL_INV:
2810                 wc->opcode = IB_WC_LOCAL_INV;
2811                 break;
2812         case BNXT_QPLIB_SWQE_TYPE_REG_MR:
2813                 wc->opcode = IB_WC_REG_MR;
2814                 break;
2815         default:
2816                 wc->opcode = IB_WC_SEND;
2817                 break;
2818         }
2819
2820         wc->status = __req_to_ib_wc_status(cqe->status);
2821 }
2822
2823 static int bnxt_re_check_packet_type(u16 raweth_qp1_flags,
2824                                      u16 raweth_qp1_flags2)
2825 {
2826         bool is_ipv6 = false, is_ipv4 = false;
2827
2828         /* raweth_qp1_flags Bit 9-6 indicates itype */
2829         if ((raweth_qp1_flags & CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
2830             != CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
2831                 return -1;
2832
2833         if (raweth_qp1_flags2 &
2834             CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_CS_CALC &&
2835             raweth_qp1_flags2 &
2836             CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_L4_CS_CALC) {
2837                 /* raweth_qp1_flags2 Bit 8 indicates ip_type. 0-v4 1 - v6 */
2838                 (raweth_qp1_flags2 &
2839                  CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_TYPE) ?
2840                         (is_ipv6 = true) : (is_ipv4 = true);
2841                 return ((is_ipv6) ?
2842                          BNXT_RE_ROCEV2_IPV6_PACKET :
2843                          BNXT_RE_ROCEV2_IPV4_PACKET);
2844         } else {
2845                 return BNXT_RE_ROCE_V1_PACKET;
2846         }
2847 }
2848
2849 static int bnxt_re_to_ib_nw_type(int nw_type)
2850 {
2851         u8 nw_hdr_type = 0xFF;
2852
2853         switch (nw_type) {
2854         case BNXT_RE_ROCE_V1_PACKET:
2855                 nw_hdr_type = RDMA_NETWORK_ROCE_V1;
2856                 break;
2857         case BNXT_RE_ROCEV2_IPV4_PACKET:
2858                 nw_hdr_type = RDMA_NETWORK_IPV4;
2859                 break;
2860         case BNXT_RE_ROCEV2_IPV6_PACKET:
2861                 nw_hdr_type = RDMA_NETWORK_IPV6;
2862                 break;
2863         }
2864         return nw_hdr_type;
2865 }
2866
2867 static bool bnxt_re_is_loopback_packet(struct bnxt_re_dev *rdev,
2868                                        void *rq_hdr_buf)
2869 {
2870         u8 *tmp_buf = NULL;
2871         struct ethhdr *eth_hdr;
2872         u16 eth_type;
2873         bool rc = false;
2874
2875         tmp_buf = (u8 *)rq_hdr_buf;
2876         /*
2877          * If dest mac is not same as I/F mac, this could be a
2878          * loopback address or multicast address, check whether
2879          * it is a loopback packet
2880          */
2881         if (!ether_addr_equal(tmp_buf, rdev->netdev->dev_addr)) {
2882                 tmp_buf += 4;
2883                 /* Check the  ether type */
2884                 eth_hdr = (struct ethhdr *)tmp_buf;
2885                 eth_type = ntohs(eth_hdr->h_proto);
2886                 switch (eth_type) {
2887                 case ETH_P_IBOE:
2888                         rc = true;
2889                         break;
2890                 case ETH_P_IP:
2891                 case ETH_P_IPV6: {
2892                         u32 len;
2893                         struct udphdr *udp_hdr;
2894
2895                         len = (eth_type == ETH_P_IP ? sizeof(struct iphdr) :
2896                                                       sizeof(struct ipv6hdr));
2897                         tmp_buf += sizeof(struct ethhdr) + len;
2898                         udp_hdr = (struct udphdr *)tmp_buf;
2899                         if (ntohs(udp_hdr->dest) ==
2900                                     ROCE_V2_UDP_DPORT)
2901                                 rc = true;
2902                         break;
2903                         }
2904                 default:
2905                         break;
2906                 }
2907         }
2908
2909         return rc;
2910 }
2911
2912 static int bnxt_re_process_raw_qp_pkt_rx(struct bnxt_re_qp *qp1_qp,
2913                                          struct bnxt_qplib_cqe *cqe)
2914 {
2915         struct bnxt_re_dev *rdev = qp1_qp->rdev;
2916         struct bnxt_re_sqp_entries *sqp_entry = NULL;
2917         struct bnxt_re_qp *qp = rdev->qp1_sqp;
2918         struct ib_send_wr *swr;
2919         struct ib_ud_wr udwr;
2920         struct ib_recv_wr rwr;
2921         int pkt_type = 0;
2922         u32 tbl_idx;
2923         void *rq_hdr_buf;
2924         dma_addr_t rq_hdr_buf_map;
2925         dma_addr_t shrq_hdr_buf_map;
2926         u32 offset = 0;
2927         u32 skip_bytes = 0;
2928         struct ib_sge s_sge[2];
2929         struct ib_sge r_sge[2];
2930         int rc;
2931
2932         memset(&udwr, 0, sizeof(udwr));
2933         memset(&rwr, 0, sizeof(rwr));
2934         memset(&s_sge, 0, sizeof(s_sge));
2935         memset(&r_sge, 0, sizeof(r_sge));
2936
2937         swr = &udwr.wr;
2938         tbl_idx = cqe->wr_id;
2939
2940         rq_hdr_buf = qp1_qp->qplib_qp.rq_hdr_buf +
2941                         (tbl_idx * qp1_qp->qplib_qp.rq_hdr_buf_size);
2942         rq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&qp1_qp->qplib_qp,
2943                                                           tbl_idx);
2944
2945         /* Shadow QP header buffer */
2946         shrq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&qp->qplib_qp,
2947                                                             tbl_idx);
2948         sqp_entry = &rdev->sqp_tbl[tbl_idx];
2949
2950         /* Store this cqe */
2951         memcpy(&sqp_entry->cqe, cqe, sizeof(struct bnxt_qplib_cqe));
2952         sqp_entry->qp1_qp = qp1_qp;
2953
2954         /* Find packet type from the cqe */
2955
2956         pkt_type = bnxt_re_check_packet_type(cqe->raweth_qp1_flags,
2957                                              cqe->raweth_qp1_flags2);
2958         if (pkt_type < 0) {
2959                 dev_err(rdev_to_dev(rdev), "Invalid packet\n");
2960                 return -EINVAL;
2961         }
2962
2963         /* Adjust the offset for the user buffer and post in the rq */
2964
2965         if (pkt_type == BNXT_RE_ROCEV2_IPV4_PACKET)
2966                 offset = 20;
2967
2968         /*
2969          * QP1 loopback packet has 4 bytes of internal header before
2970          * ether header. Skip these four bytes.
2971          */
2972         if (bnxt_re_is_loopback_packet(rdev, rq_hdr_buf))
2973                 skip_bytes = 4;
2974
2975         /* First send SGE . Skip the ether header*/
2976         s_sge[0].addr = rq_hdr_buf_map + BNXT_QPLIB_MAX_QP1_RQ_ETH_HDR_SIZE
2977                         + skip_bytes;
2978         s_sge[0].lkey = 0xFFFFFFFF;
2979         s_sge[0].length = offset ? BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV4 :
2980                                 BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
2981
2982         /* Second Send SGE */
2983         s_sge[1].addr = s_sge[0].addr + s_sge[0].length +
2984                         BNXT_QPLIB_MAX_QP1_RQ_BDETH_HDR_SIZE;
2985         if (pkt_type != BNXT_RE_ROCE_V1_PACKET)
2986                 s_sge[1].addr += 8;
2987         s_sge[1].lkey = 0xFFFFFFFF;
2988         s_sge[1].length = 256;
2989
2990         /* First recv SGE */
2991
2992         r_sge[0].addr = shrq_hdr_buf_map;
2993         r_sge[0].lkey = 0xFFFFFFFF;
2994         r_sge[0].length = 40;
2995
2996         r_sge[1].addr = sqp_entry->sge.addr + offset;
2997         r_sge[1].lkey = sqp_entry->sge.lkey;
2998         r_sge[1].length = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6 + 256 - offset;
2999
3000         /* Create receive work request */
3001         rwr.num_sge = 2;
3002         rwr.sg_list = r_sge;
3003         rwr.wr_id = tbl_idx;
3004         rwr.next = NULL;
3005
3006         rc = bnxt_re_post_recv_shadow_qp(rdev, qp, &rwr);
3007         if (rc) {
3008                 dev_err(rdev_to_dev(rdev),
3009                         "Failed to post Rx buffers to shadow QP");
3010                 return -ENOMEM;
3011         }
3012
3013         swr->num_sge = 2;
3014         swr->sg_list = s_sge;
3015         swr->wr_id = tbl_idx;
3016         swr->opcode = IB_WR_SEND;
3017         swr->next = NULL;
3018
3019         udwr.ah = &rdev->sqp_ah->ib_ah;
3020         udwr.remote_qpn = rdev->qp1_sqp->qplib_qp.id;
3021         udwr.remote_qkey = rdev->qp1_sqp->qplib_qp.qkey;
3022
3023         /* post data received  in the send queue */
3024         rc = bnxt_re_post_send_shadow_qp(rdev, qp, swr);
3025
3026         return 0;
3027 }
3028
3029 static void bnxt_re_process_res_rawqp1_wc(struct ib_wc *wc,
3030                                           struct bnxt_qplib_cqe *cqe)
3031 {
3032         wc->opcode = IB_WC_RECV;
3033         wc->status = __rawqp1_to_ib_wc_status(cqe->status);
3034         wc->wc_flags |= IB_WC_GRH;
3035 }
3036
3037 static bool bnxt_re_check_if_vlan_valid(struct bnxt_re_dev *rdev,
3038                                         u16 vlan_id)
3039 {
3040         /*
3041          * Check if the vlan is configured in the host.  If not configured, it
3042          * can be a transparent VLAN. So dont report the vlan id.
3043          */
3044         if (!__vlan_find_dev_deep_rcu(rdev->netdev,
3045                                       htons(ETH_P_8021Q), vlan_id))
3046                 return false;
3047         return true;
3048 }
3049
3050 static bool bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe *orig_cqe,
3051                                 u16 *vid, u8 *sl)
3052 {
3053         bool ret = false;
3054         u32 metadata;
3055         u16 tpid;
3056
3057         metadata = orig_cqe->raweth_qp1_metadata;
3058         if (orig_cqe->raweth_qp1_flags2 &
3059                 CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_META_FORMAT_VLAN) {
3060                 tpid = ((metadata &
3061                          CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_MASK) >>
3062                          CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_SFT);
3063                 if (tpid == ETH_P_8021Q) {
3064                         *vid = metadata &
3065                                CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_VID_MASK;
3066                         *sl = (metadata &
3067                                CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_MASK) >>
3068                                CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_SFT;
3069                         ret = true;
3070                 }
3071         }
3072
3073         return ret;
3074 }
3075
3076 static void bnxt_re_process_res_rc_wc(struct ib_wc *wc,
3077                                       struct bnxt_qplib_cqe *cqe)
3078 {
3079         wc->opcode = IB_WC_RECV;
3080         wc->status = __rc_to_ib_wc_status(cqe->status);
3081
3082         if (cqe->flags & CQ_RES_RC_FLAGS_IMM)
3083                 wc->wc_flags |= IB_WC_WITH_IMM;
3084         if (cqe->flags & CQ_RES_RC_FLAGS_INV)
3085                 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
3086         if ((cqe->flags & (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM)) ==
3087             (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM))
3088                 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
3089 }
3090
3091 static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *qp,
3092                                              struct ib_wc *wc,
3093                                              struct bnxt_qplib_cqe *cqe)
3094 {
3095         struct bnxt_re_dev *rdev = qp->rdev;
3096         struct bnxt_re_qp *qp1_qp = NULL;
3097         struct bnxt_qplib_cqe *orig_cqe = NULL;
3098         struct bnxt_re_sqp_entries *sqp_entry = NULL;
3099         int nw_type;
3100         u32 tbl_idx;
3101         u16 vlan_id;
3102         u8 sl;
3103
3104         tbl_idx = cqe->wr_id;
3105
3106         sqp_entry = &rdev->sqp_tbl[tbl_idx];
3107         qp1_qp = sqp_entry->qp1_qp;
3108         orig_cqe = &sqp_entry->cqe;
3109
3110         wc->wr_id = sqp_entry->wrid;
3111         wc->byte_len = orig_cqe->length;
3112         wc->qp = &qp1_qp->ib_qp;
3113
3114         wc->ex.imm_data = orig_cqe->immdata;
3115         wc->src_qp = orig_cqe->src_qp;
3116         memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
3117         if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
3118                 if (bnxt_re_check_if_vlan_valid(rdev, vlan_id)) {
3119                         wc->vlan_id = vlan_id;
3120                         wc->sl = sl;
3121                         wc->wc_flags |= IB_WC_WITH_VLAN;
3122                 }
3123         }
3124         wc->port_num = 1;
3125         wc->vendor_err = orig_cqe->status;
3126
3127         wc->opcode = IB_WC_RECV;
3128         wc->status = __rawqp1_to_ib_wc_status(orig_cqe->status);
3129         wc->wc_flags |= IB_WC_GRH;
3130
3131         nw_type = bnxt_re_check_packet_type(orig_cqe->raweth_qp1_flags,
3132                                             orig_cqe->raweth_qp1_flags2);
3133         if (nw_type >= 0) {
3134                 wc->network_hdr_type = bnxt_re_to_ib_nw_type(nw_type);
3135                 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
3136         }
3137 }
3138
3139 static void bnxt_re_process_res_ud_wc(struct ib_wc *wc,
3140                                       struct bnxt_qplib_cqe *cqe)
3141 {
3142         wc->opcode = IB_WC_RECV;
3143         wc->status = __rc_to_ib_wc_status(cqe->status);
3144
3145         if (cqe->flags & CQ_RES_RC_FLAGS_IMM)
3146                 wc->wc_flags |= IB_WC_WITH_IMM;
3147         if (cqe->flags & CQ_RES_RC_FLAGS_INV)
3148                 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
3149         if ((cqe->flags & (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM)) ==
3150             (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM))
3151                 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
3152 }
3153
3154 static int send_phantom_wqe(struct bnxt_re_qp *qp)
3155 {
3156         struct bnxt_qplib_qp *lib_qp = &qp->qplib_qp;
3157         unsigned long flags;
3158         int rc = 0;
3159
3160         spin_lock_irqsave(&qp->sq_lock, flags);
3161
3162         rc = bnxt_re_bind_fence_mw(lib_qp);
3163         if (!rc) {
3164                 lib_qp->sq.phantom_wqe_cnt++;
3165                 dev_dbg(&lib_qp->sq.hwq.pdev->dev,
3166                         "qp %#x sq->prod %#x sw_prod %#x phantom_wqe_cnt %d\n",
3167                         lib_qp->id, lib_qp->sq.hwq.prod,
3168                         HWQ_CMP(lib_qp->sq.hwq.prod, &lib_qp->sq.hwq),
3169                         lib_qp->sq.phantom_wqe_cnt);
3170         }
3171
3172         spin_unlock_irqrestore(&qp->sq_lock, flags);
3173         return rc;
3174 }
3175
3176 int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
3177 {
3178         struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
3179         struct bnxt_re_qp *qp;
3180         struct bnxt_qplib_cqe *cqe;
3181         int i, ncqe, budget;
3182         struct bnxt_qplib_q *sq;
3183         struct bnxt_qplib_qp *lib_qp;
3184         u32 tbl_idx;
3185         struct bnxt_re_sqp_entries *sqp_entry = NULL;
3186         unsigned long flags;
3187
3188         spin_lock_irqsave(&cq->cq_lock, flags);
3189         budget = min_t(u32, num_entries, cq->max_cql);
3190         num_entries = budget;
3191         if (!cq->cql) {
3192                 dev_err(rdev_to_dev(cq->rdev), "POLL CQ : no CQL to use");
3193                 goto exit;
3194         }
3195         cqe = &cq->cql[0];
3196         while (budget) {
3197                 lib_qp = NULL;
3198                 ncqe = bnxt_qplib_poll_cq(&cq->qplib_cq, cqe, budget, &lib_qp);
3199                 if (lib_qp) {
3200                         sq = &lib_qp->sq;
3201                         if (sq->send_phantom) {
3202                                 qp = container_of(lib_qp,
3203                                                   struct bnxt_re_qp, qplib_qp);
3204                                 if (send_phantom_wqe(qp) == -ENOMEM)
3205                                         dev_err(rdev_to_dev(cq->rdev),
3206                                                 "Phantom failed! Scheduled to send again\n");
3207                                 else
3208                                         sq->send_phantom = false;
3209                         }
3210                 }
3211                 if (ncqe < budget)
3212                         ncqe += bnxt_qplib_process_flush_list(&cq->qplib_cq,
3213                                                               cqe + ncqe,
3214                                                               budget - ncqe);
3215
3216                 if (!ncqe)
3217                         break;
3218
3219                 for (i = 0; i < ncqe; i++, cqe++) {
3220                         /* Transcribe each qplib_wqe back to ib_wc */
3221                         memset(wc, 0, sizeof(*wc));
3222
3223                         wc->wr_id = cqe->wr_id;
3224                         wc->byte_len = cqe->length;
3225                         qp = container_of
3226                                 ((struct bnxt_qplib_qp *)
3227                                  (unsigned long)(cqe->qp_handle),
3228                                  struct bnxt_re_qp, qplib_qp);
3229                         if (!qp) {
3230                                 dev_err(rdev_to_dev(cq->rdev),
3231                                         "POLL CQ : bad QP handle");
3232                                 continue;
3233                         }
3234                         wc->qp = &qp->ib_qp;
3235                         wc->ex.imm_data = cqe->immdata;
3236                         wc->src_qp = cqe->src_qp;
3237                         memcpy(wc->smac, cqe->smac, ETH_ALEN);
3238                         wc->port_num = 1;
3239                         wc->vendor_err = cqe->status;
3240
3241                         switch (cqe->opcode) {
3242                         case CQ_BASE_CQE_TYPE_REQ:
3243                                 if (qp->qplib_qp.id ==
3244                                     qp->rdev->qp1_sqp->qplib_qp.id) {
3245                                         /* Handle this completion with
3246                                          * the stored completion
3247                                          */
3248                                         memset(wc, 0, sizeof(*wc));
3249                                         continue;
3250                                 }
3251                                 bnxt_re_process_req_wc(wc, cqe);
3252                                 break;
3253                         case CQ_BASE_CQE_TYPE_RES_RAWETH_QP1:
3254                                 if (!cqe->status) {
3255                                         int rc = 0;
3256
3257                                         rc = bnxt_re_process_raw_qp_pkt_rx
3258                                                                 (qp, cqe);
3259                                         if (!rc) {
3260                                                 memset(wc, 0, sizeof(*wc));
3261                                                 continue;
3262                                         }
3263                                         cqe->status = -1;
3264                                 }
3265                                 /* Errors need not be looped back.
3266                                  * But change the wr_id to the one
3267                                  * stored in the table
3268                                  */
3269                                 tbl_idx = cqe->wr_id;
3270                                 sqp_entry = &cq->rdev->sqp_tbl[tbl_idx];
3271                                 wc->wr_id = sqp_entry->wrid;
3272                                 bnxt_re_process_res_rawqp1_wc(wc, cqe);
3273                                 break;
3274                         case CQ_BASE_CQE_TYPE_RES_RC:
3275                                 bnxt_re_process_res_rc_wc(wc, cqe);
3276                                 break;
3277                         case CQ_BASE_CQE_TYPE_RES_UD:
3278                                 if (qp->qplib_qp.id ==
3279                                     qp->rdev->qp1_sqp->qplib_qp.id) {
3280                                         /* Handle this completion with
3281                                          * the stored completion
3282                                          */
3283                                         if (cqe->status) {
3284                                                 continue;
3285                                         } else {
3286                                                 bnxt_re_process_res_shadow_qp_wc
3287                                                                 (qp, wc, cqe);
3288                                                 break;
3289                                         }
3290                                 }
3291                                 bnxt_re_process_res_ud_wc(wc, cqe);
3292                                 break;
3293                         default:
3294                                 dev_err(rdev_to_dev(cq->rdev),
3295                                         "POLL CQ : type 0x%x not handled",
3296                                         cqe->opcode);
3297                                 continue;
3298                         }
3299                         wc++;
3300                         budget--;
3301                 }
3302         }
3303 exit:
3304         spin_unlock_irqrestore(&cq->cq_lock, flags);
3305         return num_entries - budget;
3306 }
3307
3308 int bnxt_re_req_notify_cq(struct ib_cq *ib_cq,
3309                           enum ib_cq_notify_flags ib_cqn_flags)
3310 {
3311         struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
3312         int type = 0, rc = 0;
3313         unsigned long flags;
3314
3315         spin_lock_irqsave(&cq->cq_lock, flags);
3316         /* Trigger on the very next completion */
3317         if (ib_cqn_flags & IB_CQ_NEXT_COMP)
3318                 type = DBR_DBR_TYPE_CQ_ARMALL;
3319         /* Trigger on the next solicited completion */
3320         else if (ib_cqn_flags & IB_CQ_SOLICITED)
3321                 type = DBR_DBR_TYPE_CQ_ARMSE;
3322
3323         /* Poll to see if there are missed events */
3324         if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
3325             !(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) {
3326                 rc = 1;
3327                 goto exit;
3328         }
3329         bnxt_qplib_req_notify_cq(&cq->qplib_cq, type);
3330
3331 exit:
3332         spin_unlock_irqrestore(&cq->cq_lock, flags);
3333         return rc;
3334 }
3335
3336 /* Memory Regions */
3337 struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *ib_pd, int mr_access_flags)
3338 {
3339         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3340         struct bnxt_re_dev *rdev = pd->rdev;
3341         struct bnxt_re_mr *mr;
3342         u64 pbl = 0;
3343         int rc;
3344
3345         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3346         if (!mr)
3347                 return ERR_PTR(-ENOMEM);
3348
3349         mr->rdev = rdev;
3350         mr->qplib_mr.pd = &pd->qplib_pd;
3351         mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
3352         mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
3353
3354         /* Allocate and register 0 as the address */
3355         rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3356         if (rc)
3357                 goto fail;
3358
3359         mr->qplib_mr.hwq.level = PBL_LVL_MAX;
3360         mr->qplib_mr.total_size = -1; /* Infinte length */
3361         rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl, 0, false,
3362                                PAGE_SIZE);
3363         if (rc)
3364                 goto fail_mr;
3365
3366         mr->ib_mr.lkey = mr->qplib_mr.lkey;
3367         if (mr_access_flags & (IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ |
3368                                IB_ACCESS_REMOTE_ATOMIC))
3369                 mr->ib_mr.rkey = mr->ib_mr.lkey;
3370         atomic_inc(&rdev->mr_count);
3371
3372         return &mr->ib_mr;
3373
3374 fail_mr:
3375         bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3376 fail:
3377         kfree(mr);
3378         return ERR_PTR(rc);
3379 }
3380
3381 int bnxt_re_dereg_mr(struct ib_mr *ib_mr)
3382 {
3383         struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3384         struct bnxt_re_dev *rdev = mr->rdev;
3385         int rc;
3386
3387         rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3388         if (rc) {
3389                 dev_err(rdev_to_dev(rdev), "Dereg MR failed: %#x\n", rc);
3390                 return rc;
3391         }
3392
3393         if (mr->pages) {
3394                 rc = bnxt_qplib_free_fast_reg_page_list(&rdev->qplib_res,
3395                                                         &mr->qplib_frpl);
3396                 kfree(mr->pages);
3397                 mr->npages = 0;
3398                 mr->pages = NULL;
3399         }
3400         if (!IS_ERR_OR_NULL(mr->ib_umem))
3401                 ib_umem_release(mr->ib_umem);
3402
3403         kfree(mr);
3404         atomic_dec(&rdev->mr_count);
3405         return rc;
3406 }
3407
3408 static int bnxt_re_set_page(struct ib_mr *ib_mr, u64 addr)
3409 {
3410         struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3411
3412         if (unlikely(mr->npages == mr->qplib_frpl.max_pg_ptrs))
3413                 return -ENOMEM;
3414
3415         mr->pages[mr->npages++] = addr;
3416         return 0;
3417 }
3418
3419 int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
3420                       unsigned int *sg_offset)
3421 {
3422         struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3423
3424         mr->npages = 0;
3425         return ib_sg_to_pages(ib_mr, sg, sg_nents, sg_offset, bnxt_re_set_page);
3426 }
3427
3428 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type type,
3429                                u32 max_num_sg)
3430 {
3431         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3432         struct bnxt_re_dev *rdev = pd->rdev;
3433         struct bnxt_re_mr *mr = NULL;
3434         int rc;
3435
3436         if (type != IB_MR_TYPE_MEM_REG) {
3437                 dev_dbg(rdev_to_dev(rdev), "MR type 0x%x not supported", type);
3438                 return ERR_PTR(-EINVAL);
3439         }
3440         if (max_num_sg > MAX_PBL_LVL_1_PGS)
3441                 return ERR_PTR(-EINVAL);
3442
3443         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3444         if (!mr)
3445                 return ERR_PTR(-ENOMEM);
3446
3447         mr->rdev = rdev;
3448         mr->qplib_mr.pd = &pd->qplib_pd;
3449         mr->qplib_mr.flags = BNXT_QPLIB_FR_PMR;
3450         mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
3451
3452         rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3453         if (rc)
3454                 goto bail;
3455
3456         mr->ib_mr.lkey = mr->qplib_mr.lkey;
3457         mr->ib_mr.rkey = mr->ib_mr.lkey;
3458
3459         mr->pages = kcalloc(max_num_sg, sizeof(u64), GFP_KERNEL);
3460         if (!mr->pages) {
3461                 rc = -ENOMEM;
3462                 goto fail;
3463         }
3464         rc = bnxt_qplib_alloc_fast_reg_page_list(&rdev->qplib_res,
3465                                                  &mr->qplib_frpl, max_num_sg);
3466         if (rc) {
3467                 dev_err(rdev_to_dev(rdev),
3468                         "Failed to allocate HW FR page list");
3469                 goto fail_mr;
3470         }
3471
3472         atomic_inc(&rdev->mr_count);
3473         return &mr->ib_mr;
3474
3475 fail_mr:
3476         kfree(mr->pages);
3477 fail:
3478         bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3479 bail:
3480         kfree(mr);
3481         return ERR_PTR(rc);
3482 }
3483
3484 struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
3485                                struct ib_udata *udata)
3486 {
3487         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3488         struct bnxt_re_dev *rdev = pd->rdev;
3489         struct bnxt_re_mw *mw;
3490         int rc;
3491
3492         mw = kzalloc(sizeof(*mw), GFP_KERNEL);
3493         if (!mw)
3494                 return ERR_PTR(-ENOMEM);
3495         mw->rdev = rdev;
3496         mw->qplib_mw.pd = &pd->qplib_pd;
3497
3498         mw->qplib_mw.type = (type == IB_MW_TYPE_1 ?
3499                                CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE1 :
3500                                CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE2B);
3501         rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mw->qplib_mw);
3502         if (rc) {
3503                 dev_err(rdev_to_dev(rdev), "Allocate MW failed!");
3504                 goto fail;
3505         }
3506         mw->ib_mw.rkey = mw->qplib_mw.rkey;
3507
3508         atomic_inc(&rdev->mw_count);
3509         return &mw->ib_mw;
3510
3511 fail:
3512         kfree(mw);
3513         return ERR_PTR(rc);
3514 }
3515
3516 int bnxt_re_dealloc_mw(struct ib_mw *ib_mw)
3517 {
3518         struct bnxt_re_mw *mw = container_of(ib_mw, struct bnxt_re_mw, ib_mw);
3519         struct bnxt_re_dev *rdev = mw->rdev;
3520         int rc;
3521
3522         rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mw->qplib_mw);
3523         if (rc) {
3524                 dev_err(rdev_to_dev(rdev), "Free MW failed: %#x\n", rc);
3525                 return rc;
3526         }
3527
3528         kfree(mw);
3529         atomic_dec(&rdev->mw_count);
3530         return rc;
3531 }
3532
3533 static int bnxt_re_page_size_ok(int page_shift)
3534 {
3535         switch (page_shift) {
3536         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_4K:
3537         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_8K:
3538         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_64K:
3539         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_2M:
3540         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_256K:
3541         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_1M:
3542         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_4M:
3543         case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_1G:
3544                 return 1;
3545         default:
3546                 return 0;
3547         }
3548 }
3549
3550 static int fill_umem_pbl_tbl(struct ib_umem *umem, u64 *pbl_tbl_orig,
3551                              int page_shift)
3552 {
3553         u64 *pbl_tbl = pbl_tbl_orig;
3554         u64 paddr;
3555         u64 page_mask = (1ULL << page_shift) - 1;
3556         int i, pages;
3557         struct scatterlist *sg;
3558         int entry;
3559
3560         for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
3561                 pages = sg_dma_len(sg) >> PAGE_SHIFT;
3562                 for (i = 0; i < pages; i++) {
3563                         paddr = sg_dma_address(sg) + (i << PAGE_SHIFT);
3564                         if (pbl_tbl == pbl_tbl_orig)
3565                                 *pbl_tbl++ = paddr & ~page_mask;
3566                         else if ((paddr & page_mask) == 0)
3567                                 *pbl_tbl++ = paddr;
3568                 }
3569         }
3570         return pbl_tbl - pbl_tbl_orig;
3571 }
3572
3573 /* uverbs */
3574 struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *ib_pd, u64 start, u64 length,
3575                                   u64 virt_addr, int mr_access_flags,
3576                                   struct ib_udata *udata)
3577 {
3578         struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3579         struct bnxt_re_dev *rdev = pd->rdev;
3580         struct bnxt_re_mr *mr;
3581         struct ib_umem *umem;
3582         u64 *pbl_tbl = NULL;
3583         int umem_pgs, page_shift, rc;
3584
3585         if (length > BNXT_RE_MAX_MR_SIZE) {
3586                 dev_err(rdev_to_dev(rdev), "MR Size: %lld > Max supported:%lld\n",
3587                         length, BNXT_RE_MAX_MR_SIZE);
3588                 return ERR_PTR(-ENOMEM);
3589         }
3590
3591         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3592         if (!mr)
3593                 return ERR_PTR(-ENOMEM);
3594
3595         mr->rdev = rdev;
3596         mr->qplib_mr.pd = &pd->qplib_pd;
3597         mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
3598         mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_MR;
3599
3600         rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3601         if (rc) {
3602                 dev_err(rdev_to_dev(rdev), "Failed to allocate MR");
3603                 goto free_mr;
3604         }
3605         /* The fixed portion of the rkey is the same as the lkey */
3606         mr->ib_mr.rkey = mr->qplib_mr.rkey;
3607
3608         umem = ib_umem_get(ib_pd->uobject->context, start, length,
3609                            mr_access_flags, 0);
3610         if (IS_ERR(umem)) {
3611                 dev_err(rdev_to_dev(rdev), "Failed to get umem");
3612                 rc = -EFAULT;
3613                 goto free_mrw;
3614         }
3615         mr->ib_umem = umem;
3616
3617         mr->qplib_mr.va = virt_addr;
3618         umem_pgs = ib_umem_page_count(umem);
3619         if (!umem_pgs) {
3620                 dev_err(rdev_to_dev(rdev), "umem is invalid!");
3621                 rc = -EINVAL;
3622                 goto free_umem;
3623         }
3624         mr->qplib_mr.total_size = length;
3625
3626         pbl_tbl = kcalloc(umem_pgs, sizeof(u64 *), GFP_KERNEL);
3627         if (!pbl_tbl) {
3628                 rc = -ENOMEM;
3629                 goto free_umem;
3630         }
3631
3632         page_shift = umem->page_shift;
3633
3634         if (!bnxt_re_page_size_ok(page_shift)) {
3635                 dev_err(rdev_to_dev(rdev), "umem page size unsupported!");
3636                 rc = -EFAULT;
3637                 goto fail;
3638         }
3639
3640         if (!umem->hugetlb && length > BNXT_RE_MAX_MR_SIZE_LOW) {
3641                 dev_err(rdev_to_dev(rdev), "Requested MR Sz:%llu Max sup:%llu",
3642                         length, (u64)BNXT_RE_MAX_MR_SIZE_LOW);
3643                 rc = -EINVAL;
3644                 goto fail;
3645         }
3646         if (umem->hugetlb && length > BNXT_RE_PAGE_SIZE_2M) {
3647                 page_shift = BNXT_RE_PAGE_SHIFT_2M;
3648                 dev_warn(rdev_to_dev(rdev), "umem hugetlb set page_size %x",
3649                          1 << page_shift);
3650         }
3651
3652         /* Map umem buf ptrs to the PBL */
3653         umem_pgs = fill_umem_pbl_tbl(umem, pbl_tbl, page_shift);
3654         rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, pbl_tbl,
3655                                umem_pgs, false, 1 << page_shift);
3656         if (rc) {
3657                 dev_err(rdev_to_dev(rdev), "Failed to register user MR");
3658                 goto fail;
3659         }
3660
3661         kfree(pbl_tbl);
3662
3663         mr->ib_mr.lkey = mr->qplib_mr.lkey;
3664         mr->ib_mr.rkey = mr->qplib_mr.lkey;
3665         atomic_inc(&rdev->mr_count);
3666
3667         return &mr->ib_mr;
3668 fail:
3669         kfree(pbl_tbl);
3670 free_umem:
3671         ib_umem_release(umem);
3672 free_mrw:
3673         bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3674 free_mr:
3675         kfree(mr);
3676         return ERR_PTR(rc);
3677 }
3678
3679 struct ib_ucontext *bnxt_re_alloc_ucontext(struct ib_device *ibdev,
3680                                            struct ib_udata *udata)
3681 {
3682         struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
3683         struct bnxt_re_uctx_resp resp;
3684         struct bnxt_re_ucontext *uctx;
3685         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
3686         int rc;
3687
3688         dev_dbg(rdev_to_dev(rdev), "ABI version requested %d",
3689                 ibdev->uverbs_abi_ver);
3690
3691         if (ibdev->uverbs_abi_ver != BNXT_RE_ABI_VERSION) {
3692                 dev_dbg(rdev_to_dev(rdev), " is different from the device %d ",
3693                         BNXT_RE_ABI_VERSION);
3694                 return ERR_PTR(-EPERM);
3695         }
3696
3697         uctx = kzalloc(sizeof(*uctx), GFP_KERNEL);
3698         if (!uctx)
3699                 return ERR_PTR(-ENOMEM);
3700
3701         uctx->rdev = rdev;
3702
3703         uctx->shpg = (void *)__get_free_page(GFP_KERNEL);
3704         if (!uctx->shpg) {
3705                 rc = -ENOMEM;
3706                 goto fail;
3707         }
3708         spin_lock_init(&uctx->sh_lock);
3709
3710         resp.dev_id = rdev->en_dev->pdev->devfn; /*Temp, Use idr_alloc instead*/
3711         resp.max_qp = rdev->qplib_ctx.qpc_count;
3712         resp.pg_size = PAGE_SIZE;
3713         resp.cqe_sz = sizeof(struct cq_base);
3714         resp.max_cqd = dev_attr->max_cq_wqes;
3715         resp.rsvd    = 0;
3716
3717         rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
3718         if (rc) {
3719                 dev_err(rdev_to_dev(rdev), "Failed to copy user context");
3720                 rc = -EFAULT;
3721                 goto cfail;
3722         }
3723
3724         return &uctx->ib_uctx;
3725 cfail:
3726         free_page((unsigned long)uctx->shpg);
3727         uctx->shpg = NULL;
3728 fail:
3729         kfree(uctx);
3730         return ERR_PTR(rc);
3731 }
3732
3733 int bnxt_re_dealloc_ucontext(struct ib_ucontext *ib_uctx)
3734 {
3735         struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
3736                                                    struct bnxt_re_ucontext,
3737                                                    ib_uctx);
3738
3739         struct bnxt_re_dev *rdev = uctx->rdev;
3740         int rc = 0;
3741
3742         if (uctx->shpg)
3743                 free_page((unsigned long)uctx->shpg);
3744
3745         if (uctx->dpi.dbr) {
3746                 /* Free DPI only if this is the first PD allocated by the
3747                  * application and mark the context dpi as NULL
3748                  */
3749                 rc = bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
3750                                             &rdev->qplib_res.dpi_tbl,
3751                                             &uctx->dpi);
3752                 if (rc)
3753                         dev_err(rdev_to_dev(rdev), "Deallocate HW DPI failed!");
3754                         /* Don't fail, continue*/
3755                 uctx->dpi.dbr = NULL;
3756         }
3757
3758         kfree(uctx);
3759         return 0;
3760 }
3761
3762 /* Helper function to mmap the virtual memory from user app */
3763 int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma)
3764 {
3765         struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
3766                                                    struct bnxt_re_ucontext,
3767                                                    ib_uctx);
3768         struct bnxt_re_dev *rdev = uctx->rdev;
3769         u64 pfn;
3770
3771         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
3772                 return -EINVAL;
3773
3774         if (vma->vm_pgoff) {
3775                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
3776                 if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
3777                                        PAGE_SIZE, vma->vm_page_prot)) {
3778                         dev_err(rdev_to_dev(rdev), "Failed to map DPI");
3779                         return -EAGAIN;
3780                 }
3781         } else {
3782                 pfn = virt_to_phys(uctx->shpg) >> PAGE_SHIFT;
3783                 if (remap_pfn_range(vma, vma->vm_start,
3784                                     pfn, PAGE_SIZE, vma->vm_page_prot)) {
3785                         dev_err(rdev_to_dev(rdev),
3786                                 "Failed to map shared page");
3787                         return -EAGAIN;
3788                 }
3789         }
3790
3791         return 0;
3792 }