drivers/infiniband/hw/bnxt_re/main.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: Main component of the bnxt_re driver
  37  */
  38
  39 #include <linux/module.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/mutex.h>
  43 #include <linux/list.h>
  44 #include <linux/rculist.h>
  45 #include <linux/spinlock.h>
  46 #include <linux/pci.h>
  47 #include <net/dcbnl.h>
  48 #include <net/ipv6.h>
  49 #include <net/addrconf.h>
  50 #include <linux/if_ether.h>
  51
  52 #include <rdma/ib_verbs.h>
  53 #include <rdma/ib_user_verbs.h>
  54 #include <rdma/ib_umem.h>
  55 #include <rdma/ib_addr.h>
  56
  57 #include "bnxt_ulp.h"
  58 #include "roce_hsi.h"
  59 #include "qplib_res.h"
  60 #include "qplib_sp.h"
  61 #include "qplib_fp.h"
  62 #include "qplib_rcfw.h"
  63 #include "bnxt_re.h"
  64 #include "ib_verbs.h"
  65 #include <rdma/bnxt_re-abi.h>
  66 #include "bnxt.h"
  67 #include "hw_counters.h"
  68
  69 static char version[] =
  70                 BNXT_RE_DESC "\n";
  71
  72 MODULE_AUTHOR("Eddie Wai <[email protected]>");
  73 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
  74 MODULE_LICENSE("Dual BSD/GPL");
  75
  76 /* globals */
  77 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
  78 /* Mutex to protect the list of bnxt_re devices added */
  79 static DEFINE_MUTEX(bnxt_re_dev_lock);
  80 static struct workqueue_struct *bnxt_re_wq;
  81 static void bnxt_re_remove_device(struct bnxt_re_dev *rdev);
  82 static void bnxt_re_dealloc_driver(struct ib_device *ib_dev);
  83 static void bnxt_re_stop_irq(void *handle);
  84
  85 static void bnxt_re_set_drv_mode(struct bnxt_re_dev *rdev, u8 mode)
  86 {
  87         struct bnxt_qplib_chip_ctx *cctx;
  88
  89         cctx = rdev->chip_ctx;
  90         cctx->modes.wqe_mode = bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx) ?
  91                                mode : BNXT_QPLIB_WQE_MODE_STATIC;
  92 }
  93
  94 static void bnxt_re_destroy_chip_ctx(struct bnxt_re_dev *rdev)
  95 {
  96         struct bnxt_qplib_chip_ctx *chip_ctx;
  97
  98         if (!rdev->chip_ctx)
  99                 return;
 100         chip_ctx = rdev->chip_ctx;
 101         rdev->chip_ctx = NULL;
 102         rdev->rcfw.res = NULL;
 103         rdev->qplib_res.cctx = NULL;
 104         rdev->qplib_res.pdev = NULL;
 105         rdev->qplib_res.netdev = NULL;
 106         kfree(chip_ctx);
 107 }
 108
 109 static int bnxt_re_setup_chip_ctx(struct bnxt_re_dev *rdev, u8 wqe_mode)
 110 {
 111         struct bnxt_qplib_chip_ctx *chip_ctx;
 112         struct bnxt_en_dev *en_dev;
 113         struct bnxt *bp;
 114
 115         en_dev = rdev->en_dev;
 116         bp = netdev_priv(en_dev->net);
 117
 118         chip_ctx = kzalloc(sizeof(*chip_ctx), GFP_KERNEL);
 119         if (!chip_ctx)
 120                 return -ENOMEM;
 121         chip_ctx->chip_num = bp->chip_num;
 122
 123         rdev->chip_ctx = chip_ctx;
 124         /* rest members to follow eventually */
 125
 126         rdev->qplib_res.cctx = rdev->chip_ctx;
 127         rdev->rcfw.res = &rdev->qplib_res;
 128
 129         bnxt_re_set_drv_mode(rdev, wqe_mode);
 130         return 0;
 131 }
 132
 133 /* SR-IOV helper functions */
 134
 135 static void bnxt_re_get_sriov_func_type(struct bnxt_re_dev *rdev)
 136 {
 137         struct bnxt *bp;
 138
 139         bp = netdev_priv(rdev->en_dev->net);
 140         if (BNXT_VF(bp))
 141                 rdev->is_virtfn = 1;
 142 }
 143
 144 /* Set the maximum number of each resource that the driver actually wants
 145  * to allocate. This may be up to the maximum number the firmware has
 146  * reserved for the function. The driver may choose to allocate fewer
 147  * resources than the firmware maximum.
 148  */
 149 static void bnxt_re_limit_pf_res(struct bnxt_re_dev *rdev)
 150 {
 151         struct bnxt_qplib_dev_attr *attr;
 152         struct bnxt_qplib_ctx *ctx;
 153         int i;
 154
 155         attr = &rdev->dev_attr;
 156         ctx = &rdev->qplib_ctx;
 157
 158         ctx->qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT,
 159                                attr->max_qp);
 160         ctx->mrw_count = BNXT_RE_MAX_MRW_COUNT_256K;
 161         /* Use max_mr from fw since max_mrw does not get set */
 162         ctx->mrw_count = min_t(u32, ctx->mrw_count, attr->max_mr);
 163         ctx->srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT,
 164                                 attr->max_srq);
 165         ctx->cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT, attr->max_cq);
 166         if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx))
 167                 for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
 168                         rdev->qplib_ctx.tqm_ctx.qcount[i] =
 169                         rdev->dev_attr.tqm_alloc_reqs[i];
 170 }
 171
 172 static void bnxt_re_limit_vf_res(struct bnxt_qplib_ctx *qplib_ctx, u32 num_vf)
 173 {
 174         struct bnxt_qplib_vf_res *vf_res;
 175         u32 mrws = 0;
 176         u32 vf_pct;
 177         u32 nvfs;
 178
 179         vf_res = &qplib_ctx->vf_res;
 180         /*
 181          * Reserve a set of resources for the PF. Divide the remaining
 182          * resources among the VFs
 183          */
 184         vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF;
 185         nvfs = num_vf;
 186         num_vf = 100 * num_vf;
 187         vf_res->max_qp_per_vf = (qplib_ctx->qpc_count * vf_pct) / num_vf;
 188         vf_res->max_srq_per_vf = (qplib_ctx->srqc_count * vf_pct) / num_vf;
 189         vf_res->max_cq_per_vf = (qplib_ctx->cq_count * vf_pct) / num_vf;
 190         /*
 191          * The driver allows many more MRs than other resources. If the
 192          * firmware does also, then reserve a fixed amount for the PF and
 193          * divide the rest among VFs. VFs may use many MRs for NFS
 194          * mounts, ISER, NVME applications, etc. If the firmware severely
 195          * restricts the number of MRs, then let PF have half and divide
 196          * the rest among VFs, as for the other resource types.
 197          */
 198         if (qplib_ctx->mrw_count < BNXT_RE_MAX_MRW_COUNT_64K) {
 199                 mrws = qplib_ctx->mrw_count * vf_pct;
 200                 nvfs = num_vf;
 201         } else {
 202                 mrws = qplib_ctx->mrw_count - BNXT_RE_RESVD_MR_FOR_PF;
 203         }
 204         vf_res->max_mrw_per_vf = (mrws / nvfs);
 205         vf_res->max_gid_per_vf = BNXT_RE_MAX_GID_PER_VF;
 206 }
 207
 208 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 209 {
 210         u32 num_vfs;
 211
 212         memset(&rdev->qplib_ctx.vf_res, 0, sizeof(struct bnxt_qplib_vf_res));
 213         bnxt_re_limit_pf_res(rdev);
 214
 215         num_vfs =  bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx) ?
 216                         BNXT_RE_GEN_P5_MAX_VF : rdev->num_vfs;
 217         if (num_vfs)
 218                 bnxt_re_limit_vf_res(&rdev->qplib_ctx, num_vfs);
 219 }
 220
 221 /* for handling bnxt_en callbacks later */
 222 static void bnxt_re_stop(void *p)
 223 {
 224 }
 225
 226 static void bnxt_re_start(void *p)
 227 {
 228 }
 229
 230 static void bnxt_re_sriov_config(void *p, int num_vfs)
 231 {
 232         struct bnxt_re_dev *rdev = p;
 233
 234         if (!rdev)
 235                 return;
 236
 237         rdev->num_vfs = num_vfs;
 238         if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
 239                 bnxt_re_set_resource_limits(rdev);
 240                 bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw,
 241                                               &rdev->qplib_ctx);
 242         }
 243 }
 244
 245 static void bnxt_re_shutdown(void *p)
 246 {
 247         struct bnxt_re_dev *rdev = p;
 248
 249         if (!rdev)
 250                 return;
 251         ASSERT_RTNL();
 252         /* Release the MSIx vectors before queuing unregister */
 253         bnxt_re_stop_irq(rdev);
 254         ib_unregister_device_queued(&rdev->ibdev);
 255 }
 256
 257 static void bnxt_re_stop_irq(void *handle)
 258 {
 259         struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 260         struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 261         struct bnxt_qplib_nq *nq;
 262         int indx;
 263
 264         for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) {
 265                 nq = &rdev->nq[indx - 1];
 266                 bnxt_qplib_nq_stop_irq(nq, false);
 267         }
 268
 269         bnxt_qplib_rcfw_stop_irq(rcfw, false);
 270 }
 271
 272 static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
 273 {
 274         struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 275         struct bnxt_msix_entry *msix_ent = rdev->msix_entries;
 276         struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 277         struct bnxt_qplib_nq *nq;
 278         int indx, rc;
 279
 280         if (!ent) {
 281                 /* Not setting the f/w timeout bit in rcfw.
 282                  * During the driver unload the first command
 283                  * to f/w will timeout and that will set the
 284                  * timeout bit.
 285                  */
 286                 ibdev_err(&rdev->ibdev, "Failed to re-start IRQs\n");
 287                 return;
 288         }
 289
 290         /* Vectors may change after restart, so update with new vectors
 291          * in device sctructure.
 292          */
 293         for (indx = 0; indx < rdev->num_msix; indx++)
 294                 rdev->msix_entries[indx].vector = ent[indx].vector;
 295
 296         bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector,
 297                                   false);
 298         for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) {
 299                 nq = &rdev->nq[indx - 1];
 300                 rc = bnxt_qplib_nq_start_irq(nq, indx - 1,
 301                                              msix_ent[indx].vector, false);
 302                 if (rc)
 303                         ibdev_warn(&rdev->ibdev, "Failed to reinit NQ index %d\n",
 304                                    indx - 1);
 305         }
 306 }
 307
 308 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
 309         .ulp_async_notifier = NULL,
 310         .ulp_stop = bnxt_re_stop,
 311         .ulp_start = bnxt_re_start,
 312         .ulp_sriov_config = bnxt_re_sriov_config,
 313         .ulp_shutdown = bnxt_re_shutdown,
 314         .ulp_irq_stop = bnxt_re_stop_irq,
 315         .ulp_irq_restart = bnxt_re_start_irq
 316 };
 317
 318 /* RoCE -> Net driver */
 319
 320 /* Driver registration routines used to let the networking driver (bnxt_en)
 321  * to know that the RoCE driver is now installed
 322  */
 323 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev)
 324 {
 325         struct bnxt_en_dev *en_dev;
 326         int rc;
 327
 328         if (!rdev)
 329                 return -EINVAL;
 330
 331         en_dev = rdev->en_dev;
 332
 333         rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
 334                                                     BNXT_ROCE_ULP);
 335         return rc;
 336 }
 337
 338 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
 339 {
 340         struct bnxt_en_dev *en_dev;
 341         int rc = 0;
 342
 343         if (!rdev)
 344                 return -EINVAL;
 345
 346         en_dev = rdev->en_dev;
 347
 348         rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
 349                                                   &bnxt_re_ulp_ops, rdev);
 350         rdev->qplib_res.pdev = rdev->en_dev->pdev;
 351         return rc;
 352 }
 353
 354 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev)
 355 {
 356         struct bnxt_en_dev *en_dev;
 357         int rc;
 358
 359         if (!rdev)
 360                 return -EINVAL;
 361
 362         en_dev = rdev->en_dev;
 363
 364
 365         rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
 366
 367         return rc;
 368 }
 369
 370 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
 371 {
 372         int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got;
 373         struct bnxt_en_dev *en_dev;
 374
 375         if (!rdev)
 376                 return -EINVAL;
 377
 378         en_dev = rdev->en_dev;
 379
 380         num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus());
 381
 382         num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
 383                                                          rdev->msix_entries,
 384                                                          num_msix_want);
 385         if (num_msix_got < BNXT_RE_MIN_MSIX) {
 386                 rc = -EINVAL;
 387                 goto done;
 388         }
 389         if (num_msix_got != num_msix_want) {
 390                 ibdev_warn(&rdev->ibdev,
 391                            "Requested %d MSI-X vectors, got %d\n",
 392                            num_msix_want, num_msix_got);
 393         }
 394         rdev->num_msix = num_msix_got;
 395 done:
 396         return rc;
 397 }
 398
 399 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
 400                                   u16 opcd, u16 crid, u16 trid)
 401 {
 402         hdr->req_type = cpu_to_le16(opcd);
 403         hdr->cmpl_ring = cpu_to_le16(crid);
 404         hdr->target_id = cpu_to_le16(trid);
 405 }
 406
 407 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 408                                 int msg_len, void *resp, int resp_max_len,
 409                                 int timeout)
 410 {
 411         fw_msg->msg = msg;
 412         fw_msg->msg_len = msg_len;
 413         fw_msg->resp = resp;
 414         fw_msg->resp_max_len = resp_max_len;
 415         fw_msg->timeout = timeout;
 416 }
 417
 418 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev,
 419                                  u16 fw_ring_id, int type)
 420 {
 421         struct bnxt_en_dev *en_dev = rdev->en_dev;
 422         struct hwrm_ring_free_input req = {0};
 423         struct hwrm_ring_free_output resp;
 424         struct bnxt_fw_msg fw_msg;
 425         int rc = -EINVAL;
 426
 427         if (!en_dev)
 428                 return rc;
 429
 430         memset(&fw_msg, 0, sizeof(fw_msg));
 431
 432         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
 433         req.ring_type = type;
 434         req.ring_id = cpu_to_le16(fw_ring_id);
 435         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 436                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 437         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 438         if (rc)
 439                 ibdev_err(&rdev->ibdev, "Failed to free HW ring:%d :%#x",
 440                           req.ring_id, rc);
 441         return rc;
 442 }
 443
 444 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev,
 445                                   struct bnxt_re_ring_attr *ring_attr,
 446                                   u16 *fw_ring_id)
 447 {
 448         struct bnxt_en_dev *en_dev = rdev->en_dev;
 449         struct hwrm_ring_alloc_input req = {0};
 450         struct hwrm_ring_alloc_output resp;
 451         struct bnxt_fw_msg fw_msg;
 452         int rc = -EINVAL;
 453
 454         if (!en_dev)
 455                 return rc;
 456
 457         memset(&fw_msg, 0, sizeof(fw_msg));
 458         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
 459         req.enables = 0;
 460         req.page_tbl_addr =  cpu_to_le64(ring_attr->dma_arr[0]);
 461         if (ring_attr->pages > 1) {
 462                 /* Page size is in log2 units */
 463                 req.page_size = BNXT_PAGE_SHIFT;
 464                 req.page_tbl_depth = 1;
 465         }
 466         req.fbo = 0;
 467         /* Association of ring index with doorbell index and MSIX number */
 468         req.logical_id = cpu_to_le16(ring_attr->lrid);
 469         req.length = cpu_to_le32(ring_attr->depth + 1);
 470         req.ring_type = ring_attr->type;
 471         req.int_mode = ring_attr->mode;
 472         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 473                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 474         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 475         if (!rc)
 476                 *fw_ring_id = le16_to_cpu(resp.ring_id);
 477
 478         return rc;
 479 }
 480
 481 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
 482                                       u32 fw_stats_ctx_id)
 483 {
 484         struct bnxt_en_dev *en_dev = rdev->en_dev;
 485         struct hwrm_stat_ctx_free_input req = {0};
 486         struct bnxt_fw_msg fw_msg;
 487         int rc = -EINVAL;
 488
 489         if (!en_dev)
 490                 return rc;
 491
 492         memset(&fw_msg, 0, sizeof(fw_msg));
 493
 494         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
 495         req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
 496         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
 497                             sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
 498         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 499         if (rc)
 500                 ibdev_err(&rdev->ibdev, "Failed to free HW stats context %#x",
 501                           rc);
 502
 503         return rc;
 504 }
 505
 506 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
 507                                        dma_addr_t dma_map,
 508                                        u32 *fw_stats_ctx_id)
 509 {
 510         struct hwrm_stat_ctx_alloc_output resp = {0};
 511         struct hwrm_stat_ctx_alloc_input req = {0};
 512         struct bnxt_en_dev *en_dev = rdev->en_dev;
 513         struct bnxt_fw_msg fw_msg;
 514         int rc = -EINVAL;
 515
 516         *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
 517
 518         if (!en_dev)
 519                 return rc;
 520
 521         memset(&fw_msg, 0, sizeof(fw_msg));
 522
 523         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
 524         req.update_period_ms = cpu_to_le32(1000);
 525         req.stats_dma_addr = cpu_to_le64(dma_map);
 526         req.stats_dma_length = cpu_to_le16(sizeof(struct ctx_hw_stats_ext));
 527         req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
 528         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 529                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 530         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 531         if (!rc)
 532                 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 533
 534         return rc;
 535 }
 536
 537 /* Device */
 538
 539 static bool is_bnxt_re_dev(struct net_device *netdev)
 540 {
 541         struct ethtool_drvinfo drvinfo;
 542
 543         if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
 544                 memset(&drvinfo, 0, sizeof(drvinfo));
 545                 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
 546
 547                 if (strcmp(drvinfo.driver, "bnxt_en"))
 548                         return false;
 549                 return true;
 550         }
 551         return false;
 552 }
 553
 554 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 555 {
 556         struct ib_device *ibdev =
 557                 ib_device_get_by_netdev(netdev, RDMA_DRIVER_BNXT_RE);
 558         if (!ibdev)
 559                 return NULL;
 560
 561         return container_of(ibdev, struct bnxt_re_dev, ibdev);
 562 }
 563
 564 static void bnxt_re_dev_unprobe(struct net_device *netdev,
 565                                 struct bnxt_en_dev *en_dev)
 566 {
 567         dev_put(netdev);
 568         module_put(en_dev->pdev->driver->driver.owner);
 569 }
 570
 571 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 572 {
 573         struct bnxt *bp = netdev_priv(netdev);
 574         struct bnxt_en_dev *en_dev;
 575         struct pci_dev *pdev;
 576
 577         /* Call bnxt_en's RoCE probe via indirect API */
 578         if (!bp->ulp_probe)
 579                 return ERR_PTR(-EINVAL);
 580
 581         en_dev = bp->ulp_probe(netdev);
 582         if (IS_ERR(en_dev))
 583                 return en_dev;
 584
 585         pdev = en_dev->pdev;
 586         if (!pdev)
 587                 return ERR_PTR(-EINVAL);
 588
 589         if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
 590                 dev_info(&pdev->dev,
 591                         "%s: probe error: RoCE is not supported on this device",
 592                         ROCE_DRV_MODULE_NAME);
 593                 return ERR_PTR(-ENODEV);
 594         }
 595
 596         /* Bump net device reference count */
 597         if (!try_module_get(pdev->driver->driver.owner))
 598                 return ERR_PTR(-ENODEV);
 599
 600         dev_hold(netdev);
 601
 602         return en_dev;
 603 }
 604
 605 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 606                            char *buf)
 607 {
 608         struct bnxt_re_dev *rdev =
 609                 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
 610
 611         return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 612 }
 613 static DEVICE_ATTR_RO(hw_rev);
 614
 615 static ssize_t hca_type_show(struct device *device,
 616                              struct device_attribute *attr, char *buf)
 617 {
 618         struct bnxt_re_dev *rdev =
 619                 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
 620
 621         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
 622 }
 623 static DEVICE_ATTR_RO(hca_type);
 624
 625 static struct attribute *bnxt_re_attributes[] = {
 626         &dev_attr_hw_rev.attr,
 627         &dev_attr_hca_type.attr,
 628         NULL
 629 };
 630
 631 static const struct attribute_group bnxt_re_dev_attr_group = {
 632         .attrs = bnxt_re_attributes,
 633 };
 634
 635 static const struct ib_device_ops bnxt_re_dev_ops = {
 636         .owner = THIS_MODULE,
 637         .driver_id = RDMA_DRIVER_BNXT_RE,
 638         .uverbs_abi_ver = BNXT_RE_ABI_VERSION,
 639
 640         .add_gid = bnxt_re_add_gid,
 641         .alloc_hw_stats = bnxt_re_ib_alloc_hw_stats,
 642         .alloc_mr = bnxt_re_alloc_mr,
 643         .alloc_pd = bnxt_re_alloc_pd,
 644         .alloc_ucontext = bnxt_re_alloc_ucontext,
 645         .create_ah = bnxt_re_create_ah,
 646         .create_cq = bnxt_re_create_cq,
 647         .create_qp = bnxt_re_create_qp,
 648         .create_srq = bnxt_re_create_srq,
 649         .dealloc_driver = bnxt_re_dealloc_driver,
 650         .dealloc_pd = bnxt_re_dealloc_pd,
 651         .dealloc_ucontext = bnxt_re_dealloc_ucontext,
 652         .del_gid = bnxt_re_del_gid,
 653         .dereg_mr = bnxt_re_dereg_mr,
 654         .destroy_ah = bnxt_re_destroy_ah,
 655         .destroy_cq = bnxt_re_destroy_cq,
 656         .destroy_qp = bnxt_re_destroy_qp,
 657         .destroy_srq = bnxt_re_destroy_srq,
 658         .get_dev_fw_str = bnxt_re_query_fw_str,
 659         .get_dma_mr = bnxt_re_get_dma_mr,
 660         .get_hw_stats = bnxt_re_ib_get_hw_stats,
 661         .get_link_layer = bnxt_re_get_link_layer,
 662         .get_port_immutable = bnxt_re_get_port_immutable,
 663         .map_mr_sg = bnxt_re_map_mr_sg,
 664         .mmap = bnxt_re_mmap,
 665         .modify_ah = bnxt_re_modify_ah,
 666         .modify_qp = bnxt_re_modify_qp,
 667         .modify_srq = bnxt_re_modify_srq,
 668         .poll_cq = bnxt_re_poll_cq,
 669         .post_recv = bnxt_re_post_recv,
 670         .post_send = bnxt_re_post_send,
 671         .post_srq_recv = bnxt_re_post_srq_recv,
 672         .query_ah = bnxt_re_query_ah,
 673         .query_device = bnxt_re_query_device,
 674         .query_pkey = bnxt_re_query_pkey,
 675         .query_port = bnxt_re_query_port,
 676         .query_qp = bnxt_re_query_qp,
 677         .query_srq = bnxt_re_query_srq,
 678         .reg_user_mr = bnxt_re_reg_user_mr,
 679         .req_notify_cq = bnxt_re_req_notify_cq,
 680         INIT_RDMA_OBJ_SIZE(ib_ah, bnxt_re_ah, ib_ah),
 681         INIT_RDMA_OBJ_SIZE(ib_cq, bnxt_re_cq, ib_cq),
 682         INIT_RDMA_OBJ_SIZE(ib_pd, bnxt_re_pd, ib_pd),
 683         INIT_RDMA_OBJ_SIZE(ib_srq, bnxt_re_srq, ib_srq),
 684         INIT_RDMA_OBJ_SIZE(ib_ucontext, bnxt_re_ucontext, ib_uctx),
 685 };
 686
 687 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 688 {
 689         struct ib_device *ibdev = &rdev->ibdev;
 690         int ret;
 691
 692         /* ib device init */
 693         ibdev->node_type = RDMA_NODE_IB_CA;
 694         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 695                 strlen(BNXT_RE_DESC) + 5);
 696         ibdev->phys_port_cnt = 1;
 697
 698         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 699
 700         ibdev->num_comp_vectors = rdev->num_msix - 1;
 701         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 702         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 703
 704         /* User space */
 705         ibdev->uverbs_cmd_mask =
 706                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 707                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 708                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 709                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 710                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 711                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 712                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 713                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 714                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 715                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 716                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 717                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 718                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 719                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 720                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 721                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 722                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 723                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 724                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 725                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 726                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 727                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 728                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 729                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 730         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 731
 732
 733         rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group);
 734         ib_set_device_ops(ibdev, &bnxt_re_dev_ops);
 735         ret = ib_device_set_netdev(&rdev->ibdev, rdev->netdev, 1);
 736         if (ret)
 737                 return ret;
 738
 739         return ib_register_device(ibdev, "bnxt_re%d");
 740 }
 741
 742 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 743 {
 744         dev_put(rdev->netdev);
 745         rdev->netdev = NULL;
 746         mutex_lock(&bnxt_re_dev_lock);
 747         list_del_rcu(&rdev->list);
 748         mutex_unlock(&bnxt_re_dev_lock);
 749
 750         synchronize_rcu();
 751 }
 752
 753 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 754                                            struct bnxt_en_dev *en_dev)
 755 {
 756         struct bnxt_re_dev *rdev;
 757
 758         /* Allocate bnxt_re_dev instance here */
 759         rdev = ib_alloc_device(bnxt_re_dev, ibdev);
 760         if (!rdev) {
 761                 ibdev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 762                           ROCE_DRV_MODULE_NAME);
 763                 return NULL;
 764         }
 765         /* Default values */
 766         rdev->netdev = netdev;
 767         dev_hold(rdev->netdev);
 768         rdev->en_dev = en_dev;
 769         rdev->id = rdev->en_dev->pdev->devfn;
 770         INIT_LIST_HEAD(&rdev->qp_list);
 771         mutex_init(&rdev->qp_lock);
 772         atomic_set(&rdev->qp_count, 0);
 773         atomic_set(&rdev->cq_count, 0);
 774         atomic_set(&rdev->srq_count, 0);
 775         atomic_set(&rdev->mr_count, 0);
 776         atomic_set(&rdev->mw_count, 0);
 777         rdev->cosq[0] = 0xFFFF;
 778         rdev->cosq[1] = 0xFFFF;
 779
 780         mutex_lock(&bnxt_re_dev_lock);
 781         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 782         mutex_unlock(&bnxt_re_dev_lock);
 783         return rdev;
 784 }
 785
 786 static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
 787                                              *unaffi_async)
 788 {
 789         switch (unaffi_async->event) {
 790         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 791                 break;
 792         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 793                 break;
 794         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 795                 break;
 796         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 797                 break;
 798         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 799                 break;
 800         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 801                 break;
 802         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 803                 break;
 804         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 805                 break;
 806         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 807                 break;
 808         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 809                 break;
 810         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 811                 break;
 812         default:
 813                 return -EINVAL;
 814         }
 815         return 0;
 816 }
 817
 818 static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 819                                          struct bnxt_re_qp *qp)
 820 {
 821         struct ib_event event;
 822         unsigned int flags;
 823
 824         if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 825                 flags = bnxt_re_lock_cqs(qp);
 826                 bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 827                 bnxt_re_unlock_cqs(qp, flags);
 828         }
 829
 830         memset(&event, 0, sizeof(event));
 831         if (qp->qplib_qp.srq) {
 832                 event.device = &qp->rdev->ibdev;
 833                 event.element.qp = &qp->ib_qp;
 834                 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 835         }
 836
 837         if (event.device && qp->ib_qp.event_handler)
 838                 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
 839
 840         return 0;
 841 }
 842
 843 static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
 844                                            void *obj)
 845 {
 846         int rc = 0;
 847         u8 event;
 848
 849         if (!obj)
 850                 return rc; /* QP was already dead, still return success */
 851
 852         event = affi_async->event;
 853         if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) {
 854                 struct bnxt_qplib_qp *lib_qp = obj;
 855                 struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp,
 856                                                      qplib_qp);
 857                 rc = bnxt_re_handle_qp_async_event(affi_async, qp);
 858         }
 859         return rc;
 860 }
 861
 862 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 863                                void *aeqe, void *obj)
 864 {
 865         struct creq_qp_event *affi_async;
 866         struct creq_func_event *unaffi_async;
 867         u8 type;
 868         int rc;
 869
 870         type = ((struct creq_base *)aeqe)->type;
 871         if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
 872                 unaffi_async = aeqe;
 873                 rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
 874         } else {
 875                 affi_async = aeqe;
 876                 rc = bnxt_re_handle_affi_async_event(affi_async, obj);
 877         }
 878
 879         return rc;
 880 }
 881
 882 static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
 883                                 struct bnxt_qplib_srq *handle, u8 event)
 884 {
 885         struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
 886                                                qplib_srq);
 887         struct ib_event ib_event;
 888         int rc = 0;
 889
 890         if (!srq) {
 891                 ibdev_err(NULL, "%s: SRQ is NULL, SRQN not handled",
 892                           ROCE_DRV_MODULE_NAME);
 893                 rc = -EINVAL;
 894                 goto done;
 895         }
 896         ib_event.device = &srq->rdev->ibdev;
 897         ib_event.element.srq = &srq->ib_srq;
 898         if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
 899                 ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
 900         else
 901                 ib_event.event = IB_EVENT_SRQ_ERR;
 902
 903         if (srq->ib_srq.event_handler) {
 904                 /* Lock event_handler? */
 905                 (*srq->ib_srq.event_handler)(&ib_event,
 906                                              srq->ib_srq.srq_context);
 907         }
 908 done:
 909         return rc;
 910 }
 911
 912 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 913                                struct bnxt_qplib_cq *handle)
 914 {
 915         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 916                                              qplib_cq);
 917
 918         if (!cq) {
 919                 ibdev_err(NULL, "%s: CQ is NULL, CQN not handled",
 920                           ROCE_DRV_MODULE_NAME);
 921                 return -EINVAL;
 922         }
 923         if (cq->ib_cq.comp_handler) {
 924                 /* Lock comp_handler? */
 925                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 926         }
 927
 928         return 0;
 929 }
 930
 931 #define BNXT_RE_GEN_P5_PF_NQ_DB         0x10000
 932 #define BNXT_RE_GEN_P5_VF_NQ_DB         0x4000
 933 static u32 bnxt_re_get_nqdb_offset(struct bnxt_re_dev *rdev, u16 indx)
 934 {
 935         return bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx) ?
 936                 (rdev->is_virtfn ? BNXT_RE_GEN_P5_VF_NQ_DB :
 937                                    BNXT_RE_GEN_P5_PF_NQ_DB) :
 938                                    rdev->msix_entries[indx].db_offset;
 939 }
 940
 941 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 942 {
 943         int i;
 944
 945         for (i = 1; i < rdev->num_msix; i++)
 946                 bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
 947
 948         if (rdev->qplib_res.rcfw)
 949                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 950 }
 951
 952 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 953 {
 954         int num_vec_enabled = 0;
 955         int rc = 0, i;
 956         u32 db_offt;
 957
 958         bnxt_qplib_init_res(&rdev->qplib_res);
 959
 960         for (i = 1; i < rdev->num_msix ; i++) {
 961                 db_offt = bnxt_re_get_nqdb_offset(rdev, i);
 962                 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
 963                                           i - 1, rdev->msix_entries[i].vector,
 964                                           db_offt, &bnxt_re_cqn_handler,
 965                                           &bnxt_re_srqn_handler);
 966                 if (rc) {
 967                         ibdev_err(&rdev->ibdev,
 968                                   "Failed to enable NQ with rc = 0x%x", rc);
 969                         goto fail;
 970                 }
 971                 num_vec_enabled++;
 972         }
 973         return 0;
 974 fail:
 975         for (i = num_vec_enabled; i >= 0; i--)
 976                 bnxt_qplib_disable_nq(&rdev->nq[i]);
 977         return rc;
 978 }
 979
 980 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev)
 981 {
 982         u8 type;
 983         int i;
 984
 985         for (i = 0; i < rdev->num_msix - 1; i++) {
 986                 type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
 987                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type);
 988                 bnxt_qplib_free_nq(&rdev->nq[i]);
 989                 rdev->nq[i].res = NULL;
 990         }
 991 }
 992
 993 static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
 994 {
 995         bnxt_re_free_nq_res(rdev);
 996
 997         if (rdev->qplib_res.dpi_tbl.max) {
 998                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 999                                        &rdev->qplib_res.dpi_tbl,
1000                                        &rdev->dpi_privileged);
1001         }
1002         if (rdev->qplib_res.rcfw) {
1003                 bnxt_qplib_free_res(&rdev->qplib_res);
1004                 rdev->qplib_res.rcfw = NULL;
1005         }
1006 }
1007
1008 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
1009 {
1010         struct bnxt_re_ring_attr rattr = {};
1011         struct bnxt_qplib_ctx *qplib_ctx;
1012         int num_vec_created = 0;
1013         int rc = 0, i;
1014         u8 type;
1015
1016         /* Configure and allocate resources for qplib */
1017         rdev->qplib_res.rcfw = &rdev->rcfw;
1018         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
1019                                      rdev->is_virtfn);
1020         if (rc)
1021                 goto fail;
1022
1023         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
1024                                   rdev->netdev, &rdev->dev_attr);
1025         if (rc)
1026                 goto fail;
1027
1028         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
1029                                   &rdev->dpi_privileged,
1030                                   rdev);
1031         if (rc)
1032                 goto dealloc_res;
1033
1034         qplib_ctx = &rdev->qplib_ctx;
1035         for (i = 0; i < rdev->num_msix - 1; i++) {
1036                 struct bnxt_qplib_nq *nq;
1037
1038                 nq = &rdev->nq[i];
1039                 nq->hwq.max_elements = (qplib_ctx->cq_count +
1040                                         qplib_ctx->srqc_count + 2);
1041                 rc = bnxt_qplib_alloc_nq(&rdev->qplib_res, &rdev->nq[i]);
1042                 if (rc) {
1043                         ibdev_err(&rdev->ibdev, "Alloc Failed NQ%d rc:%#x",
1044                                   i, rc);
1045                         goto free_nq;
1046                 }
1047                 type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1048                 rattr.dma_arr = nq->hwq.pbl[PBL_LVL_0].pg_map_arr;
1049                 rattr.pages = nq->hwq.pbl[rdev->nq[i].hwq.level].pg_count;
1050                 rattr.type = type;
1051                 rattr.mode = RING_ALLOC_REQ_INT_MODE_MSIX;
1052                 rattr.depth = BNXT_QPLIB_NQE_MAX_CNT - 1;
1053                 rattr.lrid = rdev->msix_entries[i + 1].ring_idx;
1054                 rc = bnxt_re_net_ring_alloc(rdev, &rattr, &nq->ring_id);
1055                 if (rc) {
1056                         ibdev_err(&rdev->ibdev,
1057                                   "Failed to allocate NQ fw id with rc = 0x%x",
1058                                   rc);
1059                         bnxt_qplib_free_nq(&rdev->nq[i]);
1060                         goto free_nq;
1061                 }
1062                 num_vec_created++;
1063         }
1064         return 0;
1065 free_nq:
1066         for (i = num_vec_created - 1; i >= 0; i--) {
1067                 type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1068                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type);
1069                 bnxt_qplib_free_nq(&rdev->nq[i]);
1070         }
1071         bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
1072                                &rdev->qplib_res.dpi_tbl,
1073                                &rdev->dpi_privileged);
1074 dealloc_res:
1075         bnxt_qplib_free_res(&rdev->qplib_res);
1076
1077 fail:
1078         rdev->qplib_res.rcfw = NULL;
1079         return rc;
1080 }
1081
1082 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
1083                                    u8 port_num, enum ib_event_type event)
1084 {
1085         struct ib_event ib_event;
1086
1087         ib_event.device = ibdev;
1088         if (qp) {
1089                 ib_event.element.qp = qp;
1090                 ib_event.event = event;
1091                 if (qp->event_handler)
1092                         qp->event_handler(&ib_event, qp->qp_context);
1093
1094         } else {
1095                 ib_event.element.port_num = port_num;
1096                 ib_event.event = event;
1097                 ib_dispatch_event(&ib_event);
1098         }
1099 }
1100
1101 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
1102 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
1103                                       u64 *cid_map)
1104 {
1105         struct hwrm_queue_pri2cos_qcfg_input req = {0};
1106         struct bnxt *bp = netdev_priv(rdev->netdev);
1107         struct hwrm_queue_pri2cos_qcfg_output resp;
1108         struct bnxt_en_dev *en_dev = rdev->en_dev;
1109         struct bnxt_fw_msg fw_msg;
1110         u32 flags = 0;
1111         u8 *qcfgmap, *tmp_map;
1112         int rc = 0, i;
1113
1114         if (!cid_map)
1115                 return -EINVAL;
1116
1117         memset(&fw_msg, 0, sizeof(fw_msg));
1118         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
1119                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
1120         flags |= (dir & 0x01);
1121         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
1122         req.flags = cpu_to_le32(flags);
1123         req.port_id = bp->pf.port_id;
1124
1125         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1126                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1127         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
1128         if (rc)
1129                 return rc;
1130
1131         if (resp.queue_cfg_info) {
1132                 ibdev_warn(&rdev->ibdev,
1133                            "Asymmetric cos queue configuration detected");
1134                 ibdev_warn(&rdev->ibdev,
1135                            " on device, QoS may not be fully functional\n");
1136         }
1137         qcfgmap = &resp.pri0_cos_queue_id;
1138         tmp_map = (u8 *)cid_map;
1139         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
1140                 tmp_map[i] = qcfgmap[i];
1141
1142         return rc;
1143 }
1144
1145 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
1146                                         struct bnxt_re_qp *qp)
1147 {
1148         return (qp->ib_qp.qp_type == IB_QPT_GSI) ||
1149                (qp == rdev->gsi_ctx.gsi_sqp);
1150 }
1151
1152 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
1153 {
1154         int mask = IB_QP_STATE;
1155         struct ib_qp_attr qp_attr;
1156         struct bnxt_re_qp *qp;
1157
1158         qp_attr.qp_state = IB_QPS_ERR;
1159         mutex_lock(&rdev->qp_lock);
1160         list_for_each_entry(qp, &rdev->qp_list, list) {
1161                 /* Modify the state of all QPs except QP1/Shadow QP */
1162                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
1163                         if (qp->qplib_qp.state !=
1164                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
1165                             qp->qplib_qp.state !=
1166                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1167                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
1168                                                        1, IB_EVENT_QP_FATAL);
1169                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
1170                                                   NULL);
1171                         }
1172                 }
1173         }
1174         mutex_unlock(&rdev->qp_lock);
1175 }
1176
1177 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
1178 {
1179         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
1180         struct bnxt_qplib_gid gid;
1181         u16 gid_idx, index;
1182         int rc = 0;
1183
1184         if (!ib_device_try_get(&rdev->ibdev))
1185                 return 0;
1186
1187         if (!sgid_tbl) {
1188                 ibdev_err(&rdev->ibdev, "QPLIB: SGID table not allocated");
1189                 rc = -EINVAL;
1190                 goto out;
1191         }
1192
1193         for (index = 0; index < sgid_tbl->active; index++) {
1194                 gid_idx = sgid_tbl->hw_id[index];
1195
1196                 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
1197                             sizeof(bnxt_qplib_gid_zero)))
1198                         continue;
1199                 /* need to modify the VLAN enable setting of non VLAN GID only
1200                  * as setting is done for VLAN GID while adding GID
1201                  */
1202                 if (sgid_tbl->vlan[index])
1203                         continue;
1204
1205                 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
1206
1207                 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
1208                                             rdev->qplib_res.netdev->dev_addr);
1209         }
1210 out:
1211         ib_device_put(&rdev->ibdev);
1212         return rc;
1213 }
1214
1215 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
1216 {
1217         u32 prio_map = 0, tmp_map = 0;
1218         struct net_device *netdev;
1219         struct dcb_app app;
1220
1221         netdev = rdev->netdev;
1222
1223         memset(&app, 0, sizeof(app));
1224         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
1225         app.protocol = ETH_P_IBOE;
1226         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1227         prio_map = tmp_map;
1228
1229         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
1230         app.protocol = ROCE_V2_UDP_DPORT;
1231         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1232         prio_map |= tmp_map;
1233
1234         return prio_map;
1235 }
1236
1237 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
1238 {
1239         u16 prio;
1240         u8 id;
1241
1242         for (prio = 0, id = 0; prio < 8; prio++) {
1243                 if (prio_map & (1 << prio)) {
1244                         cosq[id] = cid_map[prio];
1245                         id++;
1246                         if (id == 2) /* Max 2 tcs supported */
1247                                 break;
1248                 }
1249         }
1250 }
1251
1252 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
1253 {
1254         u8 prio_map = 0;
1255         u64 cid_map;
1256         int rc;
1257
1258         /* Get priority for roce */
1259         prio_map = bnxt_re_get_priority_mask(rdev);
1260
1261         if (prio_map == rdev->cur_prio_map)
1262                 return 0;
1263         rdev->cur_prio_map = prio_map;
1264         /* Get cosq id for this priority */
1265         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
1266         if (rc) {
1267                 ibdev_warn(&rdev->ibdev, "no cos for p_mask %x\n", prio_map);
1268                 return rc;
1269         }
1270         /* Parse CoS IDs for app priority */
1271         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
1272
1273         /* Config BONO. */
1274         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
1275         if (rc) {
1276                 ibdev_warn(&rdev->ibdev, "no tc for cos{%x, %x}\n",
1277                            rdev->cosq[0], rdev->cosq[1]);
1278                 return rc;
1279         }
1280
1281         /* Actual priorities are not programmed as they are already
1282          * done by L2 driver; just enable or disable priority vlan tagging
1283          */
1284         if ((prio_map == 0 && rdev->qplib_res.prio) ||
1285             (prio_map != 0 && !rdev->qplib_res.prio)) {
1286                 rdev->qplib_res.prio = prio_map ? true : false;
1287
1288                 bnxt_re_update_gid(rdev);
1289         }
1290
1291         return 0;
1292 }
1293
1294 static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev)
1295 {
1296         struct bnxt_en_dev *en_dev = rdev->en_dev;
1297         struct hwrm_ver_get_output resp = {0};
1298         struct hwrm_ver_get_input req = {0};
1299         struct bnxt_fw_msg fw_msg;
1300         int rc = 0;
1301
1302         memset(&fw_msg, 0, sizeof(fw_msg));
1303         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
1304                               HWRM_VER_GET, -1, -1);
1305         req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
1306         req.hwrm_intf_min = HWRM_VERSION_MINOR;
1307         req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
1308         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1309                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1310         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
1311         if (rc) {
1312                 ibdev_err(&rdev->ibdev, "Failed to query HW version, rc = 0x%x",
1313                           rc);
1314                 return;
1315         }
1316         rdev->qplib_ctx.hwrm_intf_ver =
1317                 (u64)le16_to_cpu(resp.hwrm_intf_major) << 48 |
1318                 (u64)le16_to_cpu(resp.hwrm_intf_minor) << 32 |
1319                 (u64)le16_to_cpu(resp.hwrm_intf_build) << 16 |
1320                 le16_to_cpu(resp.hwrm_intf_patch);
1321 }
1322
1323 static int bnxt_re_ib_init(struct bnxt_re_dev *rdev)
1324 {
1325         int rc = 0;
1326         u32 event;
1327
1328         /* Register ib dev */
1329         rc = bnxt_re_register_ib(rdev);
1330         if (rc) {
1331                 pr_err("Failed to register with IB: %#x\n", rc);
1332                 return rc;
1333         }
1334         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1335         ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1336                          &rdev->active_width);
1337         set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
1338
1339         event = netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev) ?
1340                 IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
1341
1342         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, event);
1343
1344         return rc;
1345 }
1346
1347 static void bnxt_re_dev_uninit(struct bnxt_re_dev *rdev)
1348 {
1349         u8 type;
1350         int rc;
1351
1352         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1353                 cancel_delayed_work_sync(&rdev->worker);
1354
1355         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED,
1356                                &rdev->flags))
1357                 bnxt_re_cleanup_res(rdev);
1358         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags))
1359                 bnxt_re_free_res(rdev);
1360
1361         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1362                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1363                 if (rc)
1364                         ibdev_warn(&rdev->ibdev,
1365                                    "Failed to deinitialize RCFW: %#x", rc);
1366                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1367                 bnxt_qplib_free_ctx(&rdev->qplib_res, &rdev->qplib_ctx);
1368                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1369                 type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1370                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq.ring_id, type);
1371                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1372         }
1373         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1374                 rc = bnxt_re_free_msix(rdev);
1375                 if (rc)
1376                         ibdev_warn(&rdev->ibdev,
1377                                    "Failed to free MSI-X vectors: %#x", rc);
1378         }
1379
1380         bnxt_re_destroy_chip_ctx(rdev);
1381         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1382                 rc = bnxt_re_unregister_netdev(rdev);
1383                 if (rc)
1384                         ibdev_warn(&rdev->ibdev,
1385                                    "Failed to unregister with netdev: %#x", rc);
1386         }
1387 }
1388
1389 /* worker thread for polling periodic events. Now used for QoS programming*/
1390 static void bnxt_re_worker(struct work_struct *work)
1391 {
1392         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1393                                                 worker.work);
1394
1395         bnxt_re_setup_qos(rdev);
1396         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1397 }
1398
1399 static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 wqe_mode)
1400 {
1401         struct bnxt_qplib_creq_ctx *creq;
1402         struct bnxt_re_ring_attr rattr;
1403         u32 db_offt;
1404         int vid;
1405         u8 type;
1406         int rc;
1407
1408         /* Registered a new RoCE device instance to netdev */
1409         memset(&rattr, 0, sizeof(rattr));
1410         rc = bnxt_re_register_netdev(rdev);
1411         if (rc) {
1412                 rtnl_unlock();
1413                 ibdev_err(&rdev->ibdev,
1414                           "Failed to register with netedev: %#x\n", rc);
1415                 return -EINVAL;
1416         }
1417         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1418
1419         rc = bnxt_re_setup_chip_ctx(rdev, wqe_mode);
1420         if (rc) {
1421                 ibdev_err(&rdev->ibdev, "Failed to get chip context\n");
1422                 return -EINVAL;
1423         }
1424
1425         /* Check whether VF or PF */
1426         bnxt_re_get_sriov_func_type(rdev);
1427
1428         rc = bnxt_re_request_msix(rdev);
1429         if (rc) {
1430                 ibdev_err(&rdev->ibdev,
1431                           "Failed to get MSI-X vectors: %#x\n", rc);
1432                 rc = -EINVAL;
1433                 goto fail;
1434         }
1435         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1436
1437         bnxt_re_query_hwrm_intf_version(rdev);
1438
1439         /* Establish RCFW Communication Channel to initialize the context
1440          * memory for the function and all child VFs
1441          */
1442         rc = bnxt_qplib_alloc_rcfw_channel(&rdev->qplib_res, &rdev->rcfw,
1443                                            &rdev->qplib_ctx,
1444                                            BNXT_RE_MAX_QPC_COUNT);
1445         if (rc) {
1446                 ibdev_err(&rdev->ibdev,
1447                           "Failed to allocate RCFW Channel: %#x\n", rc);
1448                 goto fail;
1449         }
1450
1451         type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1452         creq = &rdev->rcfw.creq;
1453         rattr.dma_arr = creq->hwq.pbl[PBL_LVL_0].pg_map_arr;
1454         rattr.pages = creq->hwq.pbl[creq->hwq.level].pg_count;
1455         rattr.type = type;
1456         rattr.mode = RING_ALLOC_REQ_INT_MODE_MSIX;
1457         rattr.depth = BNXT_QPLIB_CREQE_MAX_CNT - 1;
1458         rattr.lrid = rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx;
1459         rc = bnxt_re_net_ring_alloc(rdev, &rattr, &creq->ring_id);
1460         if (rc) {
1461                 ibdev_err(&rdev->ibdev, "Failed to allocate CREQ: %#x\n", rc);
1462                 goto free_rcfw;
1463         }
1464         db_offt = bnxt_re_get_nqdb_offset(rdev, BNXT_RE_AEQ_IDX);
1465         vid = rdev->msix_entries[BNXT_RE_AEQ_IDX].vector;
1466         rc = bnxt_qplib_enable_rcfw_channel(&rdev->rcfw,
1467                                             vid, db_offt, rdev->is_virtfn,
1468                                             &bnxt_re_aeq_handler);
1469         if (rc) {
1470                 ibdev_err(&rdev->ibdev, "Failed to enable RCFW channel: %#x\n",
1471                           rc);
1472                 goto free_ring;
1473         }
1474
1475         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
1476                                      rdev->is_virtfn);
1477         if (rc)
1478                 goto disable_rcfw;
1479
1480         bnxt_re_set_resource_limits(rdev);
1481
1482         rc = bnxt_qplib_alloc_ctx(&rdev->qplib_res, &rdev->qplib_ctx, 0,
1483                                   bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx));
1484         if (rc) {
1485                 ibdev_err(&rdev->ibdev,
1486                           "Failed to allocate QPLIB context: %#x\n", rc);
1487                 goto disable_rcfw;
1488         }
1489         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1490                                          rdev->qplib_ctx.stats.dma_map,
1491                                          &rdev->qplib_ctx.stats.fw_id);
1492         if (rc) {
1493                 ibdev_err(&rdev->ibdev,
1494                           "Failed to allocate stats context: %#x\n", rc);
1495                 goto free_ctx;
1496         }
1497
1498         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
1499                                   rdev->is_virtfn);
1500         if (rc) {
1501                 ibdev_err(&rdev->ibdev,
1502                           "Failed to initialize RCFW: %#x\n", rc);
1503                 goto free_sctx;
1504         }
1505         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1506
1507         /* Resources based on the 'new' device caps */
1508         rc = bnxt_re_alloc_res(rdev);
1509         if (rc) {
1510                 ibdev_err(&rdev->ibdev,
1511                           "Failed to allocate resources: %#x\n", rc);
1512                 goto fail;
1513         }
1514         set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags);
1515         rc = bnxt_re_init_res(rdev);
1516         if (rc) {
1517                 ibdev_err(&rdev->ibdev,
1518                           "Failed to initialize resources: %#x\n", rc);
1519                 goto fail;
1520         }
1521
1522         set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags);
1523
1524         if (!rdev->is_virtfn) {
1525                 rc = bnxt_re_setup_qos(rdev);
1526                 if (rc)
1527                         ibdev_info(&rdev->ibdev,
1528                                    "RoCE priority not yet configured\n");
1529
1530                 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1531                 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1532                 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1533         }
1534
1535         return 0;
1536 free_sctx:
1537         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1538 free_ctx:
1539         bnxt_qplib_free_ctx(&rdev->qplib_res, &rdev->qplib_ctx);
1540 disable_rcfw:
1541         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1542 free_ring:
1543         type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1544         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq.ring_id, type);
1545 free_rcfw:
1546         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1547 fail:
1548         bnxt_re_dev_uninit(rdev);
1549
1550         return rc;
1551 }
1552
1553 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1554 {
1555         struct bnxt_en_dev *en_dev = rdev->en_dev;
1556         struct net_device *netdev = rdev->netdev;
1557
1558         bnxt_re_dev_remove(rdev);
1559
1560         if (netdev)
1561                 bnxt_re_dev_unprobe(netdev, en_dev);
1562 }
1563
1564 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1565 {
1566         struct bnxt_en_dev *en_dev;
1567         int rc = 0;
1568
1569         if (!is_bnxt_re_dev(netdev))
1570                 return -ENODEV;
1571
1572         en_dev = bnxt_re_dev_probe(netdev);
1573         if (IS_ERR(en_dev)) {
1574                 if (en_dev != ERR_PTR(-ENODEV))
1575                         ibdev_err(&(*rdev)->ibdev, "%s: Failed to probe\n",
1576                                   ROCE_DRV_MODULE_NAME);
1577                 rc = PTR_ERR(en_dev);
1578                 goto exit;
1579         }
1580         *rdev = bnxt_re_dev_add(netdev, en_dev);
1581         if (!*rdev) {
1582                 rc = -ENOMEM;
1583                 bnxt_re_dev_unprobe(netdev, en_dev);
1584                 goto exit;
1585         }
1586 exit:
1587         return rc;
1588 }
1589
1590 static void bnxt_re_remove_device(struct bnxt_re_dev *rdev)
1591 {
1592         bnxt_re_dev_uninit(rdev);
1593         pci_dev_put(rdev->en_dev->pdev);
1594         bnxt_re_dev_unreg(rdev);
1595 }
1596
1597 static int bnxt_re_add_device(struct bnxt_re_dev **rdev,
1598                               struct net_device *netdev, u8 wqe_mode)
1599 {
1600         int rc;
1601
1602         rc = bnxt_re_dev_reg(rdev, netdev);
1603         if (rc == -ENODEV)
1604                 return rc;
1605         if (rc) {
1606                 pr_err("Failed to register with the device %s: %#x\n",
1607                        netdev->name, rc);
1608                 return rc;
1609         }
1610
1611         pci_dev_get((*rdev)->en_dev->pdev);
1612         rc = bnxt_re_dev_init(*rdev, wqe_mode);
1613         if (rc) {
1614                 pci_dev_put((*rdev)->en_dev->pdev);
1615                 bnxt_re_dev_unreg(*rdev);
1616         }
1617
1618         return rc;
1619 }
1620
1621 static void bnxt_re_dealloc_driver(struct ib_device *ib_dev)
1622 {
1623         struct bnxt_re_dev *rdev =
1624                 container_of(ib_dev, struct bnxt_re_dev, ibdev);
1625
1626         dev_info(rdev_to_dev(rdev), "Unregistering Device");
1627
1628         rtnl_lock();
1629         bnxt_re_remove_device(rdev);
1630         rtnl_unlock();
1631 }
1632
1633 /* Handle all deferred netevents tasks */
1634 static void bnxt_re_task(struct work_struct *work)
1635 {
1636         struct bnxt_re_work *re_work;
1637         struct bnxt_re_dev *rdev;
1638         int rc = 0;
1639
1640         re_work = container_of(work, struct bnxt_re_work, work);
1641         rdev = re_work->rdev;
1642
1643         if (re_work->event == NETDEV_REGISTER) {
1644                 rc = bnxt_re_ib_init(rdev);
1645                 if (rc) {
1646                         ibdev_err(&rdev->ibdev,
1647                                   "Failed to register with IB: %#x", rc);
1648                         rtnl_lock();
1649                         bnxt_re_remove_device(rdev);
1650                         rtnl_unlock();
1651                         goto exit;
1652                 }
1653                 goto exit;
1654         }
1655
1656         if (!ib_device_try_get(&rdev->ibdev))
1657                 goto exit;
1658
1659         switch (re_work->event) {
1660         case NETDEV_UP:
1661                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1662                                        IB_EVENT_PORT_ACTIVE);
1663                 break;
1664         case NETDEV_DOWN:
1665                 bnxt_re_dev_stop(rdev);
1666                 break;
1667         case NETDEV_CHANGE:
1668                 if (!netif_carrier_ok(rdev->netdev))
1669                         bnxt_re_dev_stop(rdev);
1670                 else if (netif_carrier_ok(rdev->netdev))
1671                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1672                                                IB_EVENT_PORT_ACTIVE);
1673                 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1674                                  &rdev->active_width);
1675                 break;
1676         default:
1677                 break;
1678         }
1679         ib_device_put(&rdev->ibdev);
1680 exit:
1681         put_device(&rdev->ibdev.dev);
1682         kfree(re_work);
1683 }
1684
1685 /*
1686  * "Notifier chain callback can be invoked for the same chain from
1687  * different CPUs at the same time".
1688  *
1689  * For cases when the netdev is already present, our call to the
1690  * register_netdevice_notifier() will actually get the rtnl_lock()
1691  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1692  * events.
1693  *
1694  * But for cases when the netdev is not already present, the notifier
1695  * chain is subjected to be invoked from different CPUs simultaneously.
1696  *
1697  * This is protected by the netdev_mutex.
1698  */
1699 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1700                                 unsigned long event, void *ptr)
1701 {
1702         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1703         struct bnxt_re_work *re_work;
1704         struct bnxt_re_dev *rdev;
1705         int rc = 0;
1706         bool sch_work = false;
1707         bool release = true;
1708
1709         real_dev = rdma_vlan_dev_real_dev(netdev);
1710         if (!real_dev)
1711                 real_dev = netdev;
1712
1713         rdev = bnxt_re_from_netdev(real_dev);
1714         if (!rdev && event != NETDEV_REGISTER)
1715                 return NOTIFY_OK;
1716
1717         if (real_dev != netdev)
1718                 goto exit;
1719
1720         switch (event) {
1721         case NETDEV_REGISTER:
1722                 if (rdev)
1723                         break;
1724                 rc = bnxt_re_add_device(&rdev, real_dev,
1725                                         BNXT_QPLIB_WQE_MODE_STATIC);
1726                 if (!rc)
1727                         sch_work = true;
1728                 release = false;
1729                 break;
1730
1731         case NETDEV_UNREGISTER:
1732                 ib_unregister_device_queued(&rdev->ibdev);
1733                 break;
1734
1735         default:
1736                 sch_work = true;
1737                 break;
1738         }
1739         if (sch_work) {
1740                 /* Allocate for the deferred task */
1741                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1742                 if (re_work) {
1743                         get_device(&rdev->ibdev.dev);
1744                         re_work->rdev = rdev;
1745                         re_work->event = event;
1746                         re_work->vlan_dev = (real_dev == netdev ?
1747                                              NULL : netdev);
1748                         INIT_WORK(&re_work->work, bnxt_re_task);
1749                         queue_work(bnxt_re_wq, &re_work->work);
1750                 }
1751         }
1752
1753 exit:
1754         if (rdev && release)
1755                 ib_device_put(&rdev->ibdev);
1756         return NOTIFY_DONE;
1757 }
1758
1759 static struct notifier_block bnxt_re_netdev_notifier = {
1760         .notifier_call = bnxt_re_netdev_event
1761 };
1762
1763 static int __init bnxt_re_mod_init(void)
1764 {
1765         int rc = 0;
1766
1767         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1768
1769         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1770         if (!bnxt_re_wq)
1771                 return -ENOMEM;
1772
1773         INIT_LIST_HEAD(&bnxt_re_dev_list);
1774
1775         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1776         if (rc) {
1777                 pr_err("%s: Cannot register to netdevice_notifier",
1778                        ROCE_DRV_MODULE_NAME);
1779                 goto err_netdev;
1780         }
1781         return 0;
1782
1783 err_netdev:
1784         destroy_workqueue(bnxt_re_wq);
1785
1786         return rc;
1787 }
1788
1789 static void __exit bnxt_re_mod_exit(void)
1790 {
1791         struct bnxt_re_dev *rdev;
1792
1793         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1794         if (bnxt_re_wq)
1795                 destroy_workqueue(bnxt_re_wq);
1796         list_for_each_entry(rdev, &bnxt_re_dev_list, list) {
1797                 /* VF device removal should be called before the removal
1798                  * of PF device. Queue VFs unregister first, so that VFs
1799                  * shall be removed before the PF during the call of
1800                  * ib_unregister_driver.
1801                  */
1802                 if (rdev->is_virtfn)
1803                         ib_unregister_device(&rdev->ibdev);
1804         }
1805         ib_unregister_driver(RDMA_DRIVER_BNXT_RE);
1806 }
1807
1808 module_init(bnxt_re_mod_init);
1809 module_exit(bnxt_re_mod_exit);