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_ib_unreg(struct bnxt_re_dev *rdev);
  82
  83 /* SR-IOV helper functions */
  84
  85 static void bnxt_re_get_sriov_func_type(struct bnxt_re_dev *rdev)
  86 {
  87         struct bnxt *bp;
  88
  89         bp = netdev_priv(rdev->en_dev->net);
  90         if (BNXT_VF(bp))
  91                 rdev->is_virtfn = 1;
  92 }
  93
  94 /* Set the maximum number of each resource that the driver actually wants
  95  * to allocate. This may be up to the maximum number the firmware has
  96  * reserved for the function. The driver may choose to allocate fewer
  97  * resources than the firmware maximum.
  98  */
  99 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 100 {
 101         u32 vf_qps = 0, vf_srqs = 0, vf_cqs = 0, vf_mrws = 0, vf_gids = 0;
 102         u32 i;
 103         u32 vf_pct;
 104         u32 num_vfs;
 105         struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
 106
 107         rdev->qplib_ctx.qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT,
 108                                           dev_attr->max_qp);
 109
 110         rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT_256K;
 111         /* Use max_mr from fw since max_mrw does not get set */
 112         rdev->qplib_ctx.mrw_count = min_t(u32, rdev->qplib_ctx.mrw_count,
 113                                           dev_attr->max_mr);
 114         rdev->qplib_ctx.srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT,
 115                                            dev_attr->max_srq);
 116         rdev->qplib_ctx.cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT,
 117                                          dev_attr->max_cq);
 118
 119         for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
 120                 rdev->qplib_ctx.tqm_count[i] =
 121                 rdev->dev_attr.tqm_alloc_reqs[i];
 122
 123         if (rdev->num_vfs) {
 124                 /*
 125                  * Reserve a set of resources for the PF. Divide the remaining
 126                  * resources among the VFs
 127                  */
 128                 vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF;
 129                 num_vfs = 100 * rdev->num_vfs;
 130                 vf_qps = (rdev->qplib_ctx.qpc_count * vf_pct) / num_vfs;
 131                 vf_srqs = (rdev->qplib_ctx.srqc_count * vf_pct) / num_vfs;
 132                 vf_cqs = (rdev->qplib_ctx.cq_count * vf_pct) / num_vfs;
 133                 /*
 134                  * The driver allows many more MRs than other resources. If the
 135                  * firmware does also, then reserve a fixed amount for the PF
 136                  * and divide the rest among VFs. VFs may use many MRs for NFS
 137                  * mounts, ISER, NVME applications, etc. If the firmware
 138                  * severely restricts the number of MRs, then let PF have
 139                  * half and divide the rest among VFs, as for the other
 140                  * resource types.
 141                  */
 142                 if (rdev->qplib_ctx.mrw_count < BNXT_RE_MAX_MRW_COUNT_64K)
 143                         vf_mrws = rdev->qplib_ctx.mrw_count * vf_pct / num_vfs;
 144                 else
 145                         vf_mrws = (rdev->qplib_ctx.mrw_count -
 146                                    BNXT_RE_RESVD_MR_FOR_PF) / rdev->num_vfs;
 147                 vf_gids = BNXT_RE_MAX_GID_PER_VF;
 148         }
 149         rdev->qplib_ctx.vf_res.max_mrw_per_vf = vf_mrws;
 150         rdev->qplib_ctx.vf_res.max_gid_per_vf = vf_gids;
 151         rdev->qplib_ctx.vf_res.max_qp_per_vf = vf_qps;
 152         rdev->qplib_ctx.vf_res.max_srq_per_vf = vf_srqs;
 153         rdev->qplib_ctx.vf_res.max_cq_per_vf = vf_cqs;
 154 }
 155
 156 /* for handling bnxt_en callbacks later */
 157 static void bnxt_re_stop(void *p)
 158 {
 159 }
 160
 161 static void bnxt_re_start(void *p)
 162 {
 163 }
 164
 165 static void bnxt_re_sriov_config(void *p, int num_vfs)
 166 {
 167         struct bnxt_re_dev *rdev = p;
 168
 169         if (!rdev)
 170                 return;
 171
 172         rdev->num_vfs = num_vfs;
 173         bnxt_re_set_resource_limits(rdev);
 174         bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw,
 175                                       &rdev->qplib_ctx);
 176 }
 177
 178 static void bnxt_re_shutdown(void *p)
 179 {
 180         struct bnxt_re_dev *rdev = p;
 181
 182         if (!rdev)
 183                 return;
 184
 185         bnxt_re_ib_unreg(rdev);
 186 }
 187
 188 static void bnxt_re_stop_irq(void *handle)
 189 {
 190         struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 191         struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 192         struct bnxt_qplib_nq *nq;
 193         int indx;
 194
 195         for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) {
 196                 nq = &rdev->nq[indx - 1];
 197                 bnxt_qplib_nq_stop_irq(nq, false);
 198         }
 199
 200         bnxt_qplib_rcfw_stop_irq(rcfw, false);
 201 }
 202
 203 static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
 204 {
 205         struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 206         struct bnxt_msix_entry *msix_ent = rdev->msix_entries;
 207         struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 208         struct bnxt_qplib_nq *nq;
 209         int indx, rc;
 210
 211         if (!ent) {
 212                 /* Not setting the f/w timeout bit in rcfw.
 213                  * During the driver unload the first command
 214                  * to f/w will timeout and that will set the
 215                  * timeout bit.
 216                  */
 217                 dev_err(rdev_to_dev(rdev), "Failed to re-start IRQs\n");
 218                 return;
 219         }
 220
 221         /* Vectors may change after restart, so update with new vectors
 222          * in device sctructure.
 223          */
 224         for (indx = 0; indx < rdev->num_msix; indx++)
 225                 rdev->msix_entries[indx].vector = ent[indx].vector;
 226
 227         bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector,
 228                                   false);
 229         for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) {
 230                 nq = &rdev->nq[indx - 1];
 231                 rc = bnxt_qplib_nq_start_irq(nq, indx - 1,
 232                                              msix_ent[indx].vector, false);
 233                 if (rc)
 234                         dev_warn(rdev_to_dev(rdev),
 235                                  "Failed to reinit NQ index %d\n", indx - 1);
 236         }
 237 }
 238
 239 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
 240         .ulp_async_notifier = NULL,
 241         .ulp_stop = bnxt_re_stop,
 242         .ulp_start = bnxt_re_start,
 243         .ulp_sriov_config = bnxt_re_sriov_config,
 244         .ulp_shutdown = bnxt_re_shutdown,
 245         .ulp_irq_stop = bnxt_re_stop_irq,
 246         .ulp_irq_restart = bnxt_re_start_irq
 247 };
 248
 249 /* RoCE -> Net driver */
 250
 251 /* Driver registration routines used to let the networking driver (bnxt_en)
 252  * to know that the RoCE driver is now installed
 253  */
 254 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev)
 255 {
 256         struct bnxt_en_dev *en_dev;
 257         int rc;
 258
 259         if (!rdev)
 260                 return -EINVAL;
 261
 262         en_dev = rdev->en_dev;
 263
 264         rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
 265                                                     BNXT_ROCE_ULP);
 266         return rc;
 267 }
 268
 269 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
 270 {
 271         struct bnxt_en_dev *en_dev;
 272         int rc = 0;
 273
 274         if (!rdev)
 275                 return -EINVAL;
 276
 277         en_dev = rdev->en_dev;
 278
 279         rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
 280                                                   &bnxt_re_ulp_ops, rdev);
 281         return rc;
 282 }
 283
 284 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev)
 285 {
 286         struct bnxt_en_dev *en_dev;
 287         int rc;
 288
 289         if (!rdev)
 290                 return -EINVAL;
 291
 292         en_dev = rdev->en_dev;
 293
 294
 295         rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
 296
 297         return rc;
 298 }
 299
 300 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
 301 {
 302         int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got;
 303         struct bnxt_en_dev *en_dev;
 304
 305         if (!rdev)
 306                 return -EINVAL;
 307
 308         en_dev = rdev->en_dev;
 309
 310         num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus());
 311
 312         num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
 313                                                          rdev->msix_entries,
 314                                                          num_msix_want);
 315         if (num_msix_got < BNXT_RE_MIN_MSIX) {
 316                 rc = -EINVAL;
 317                 goto done;
 318         }
 319         if (num_msix_got != num_msix_want) {
 320                 dev_warn(rdev_to_dev(rdev),
 321                          "Requested %d MSI-X vectors, got %d\n",
 322                          num_msix_want, num_msix_got);
 323         }
 324         rdev->num_msix = num_msix_got;
 325 done:
 326         return rc;
 327 }
 328
 329 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
 330                                   u16 opcd, u16 crid, u16 trid)
 331 {
 332         hdr->req_type = cpu_to_le16(opcd);
 333         hdr->cmpl_ring = cpu_to_le16(crid);
 334         hdr->target_id = cpu_to_le16(trid);
 335 }
 336
 337 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 338                                 int msg_len, void *resp, int resp_max_len,
 339                                 int timeout)
 340 {
 341         fw_msg->msg = msg;
 342         fw_msg->msg_len = msg_len;
 343         fw_msg->resp = resp;
 344         fw_msg->resp_max_len = resp_max_len;
 345         fw_msg->timeout = timeout;
 346 }
 347
 348 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id)
 349 {
 350         struct bnxt_en_dev *en_dev = rdev->en_dev;
 351         struct hwrm_ring_free_input req = {0};
 352         struct hwrm_ring_free_output resp;
 353         struct bnxt_fw_msg fw_msg;
 354         int rc = -EINVAL;
 355
 356         if (!en_dev)
 357                 return rc;
 358
 359         memset(&fw_msg, 0, sizeof(fw_msg));
 360
 361         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
 362         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 363         req.ring_id = cpu_to_le16(fw_ring_id);
 364         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 365                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 366         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 367         if (rc)
 368                 dev_err(rdev_to_dev(rdev),
 369                         "Failed to free HW ring:%d :%#x", req.ring_id, rc);
 370         return rc;
 371 }
 372
 373 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
 374                                   int pages, int type, u32 ring_mask,
 375                                   u32 map_index, u16 *fw_ring_id)
 376 {
 377         struct bnxt_en_dev *en_dev = rdev->en_dev;
 378         struct hwrm_ring_alloc_input req = {0};
 379         struct hwrm_ring_alloc_output resp;
 380         struct bnxt_fw_msg fw_msg;
 381         int rc = -EINVAL;
 382
 383         if (!en_dev)
 384                 return rc;
 385
 386         memset(&fw_msg, 0, sizeof(fw_msg));
 387         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
 388         req.enables = 0;
 389         req.page_tbl_addr =  cpu_to_le64(dma_arr[0]);
 390         if (pages > 1) {
 391                 /* Page size is in log2 units */
 392                 req.page_size = BNXT_PAGE_SHIFT;
 393                 req.page_tbl_depth = 1;
 394         }
 395         req.fbo = 0;
 396         /* Association of ring index with doorbell index and MSIX number */
 397         req.logical_id = cpu_to_le16(map_index);
 398         req.length = cpu_to_le32(ring_mask + 1);
 399         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 400         req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
 401         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 402                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 403         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 404         if (!rc)
 405                 *fw_ring_id = le16_to_cpu(resp.ring_id);
 406
 407         return rc;
 408 }
 409
 410 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
 411                                       u32 fw_stats_ctx_id)
 412 {
 413         struct bnxt_en_dev *en_dev = rdev->en_dev;
 414         struct hwrm_stat_ctx_free_input req = {0};
 415         struct bnxt_fw_msg fw_msg;
 416         int rc = -EINVAL;
 417
 418         if (!en_dev)
 419                 return rc;
 420
 421         memset(&fw_msg, 0, sizeof(fw_msg));
 422
 423         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
 424         req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
 425         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
 426                             sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
 427         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 428         if (rc)
 429                 dev_err(rdev_to_dev(rdev),
 430                         "Failed to free HW stats context %#x", rc);
 431
 432         return rc;
 433 }
 434
 435 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
 436                                        dma_addr_t dma_map,
 437                                        u32 *fw_stats_ctx_id)
 438 {
 439         struct hwrm_stat_ctx_alloc_output resp = {0};
 440         struct hwrm_stat_ctx_alloc_input req = {0};
 441         struct bnxt_en_dev *en_dev = rdev->en_dev;
 442         struct bnxt_fw_msg fw_msg;
 443         int rc = -EINVAL;
 444
 445         *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
 446
 447         if (!en_dev)
 448                 return rc;
 449
 450         memset(&fw_msg, 0, sizeof(fw_msg));
 451
 452         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
 453         req.update_period_ms = cpu_to_le32(1000);
 454         req.stats_dma_addr = cpu_to_le64(dma_map);
 455         req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
 456         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 457                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 458         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 459         if (!rc)
 460                 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 461
 462         return rc;
 463 }
 464
 465 /* Device */
 466
 467 static bool is_bnxt_re_dev(struct net_device *netdev)
 468 {
 469         struct ethtool_drvinfo drvinfo;
 470
 471         if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
 472                 memset(&drvinfo, 0, sizeof(drvinfo));
 473                 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
 474
 475                 if (strcmp(drvinfo.driver, "bnxt_en"))
 476                         return false;
 477                 return true;
 478         }
 479         return false;
 480 }
 481
 482 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 483 {
 484         struct bnxt_re_dev *rdev;
 485
 486         rcu_read_lock();
 487         list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
 488                 if (rdev->netdev == netdev) {
 489                         rcu_read_unlock();
 490                         return rdev;
 491                 }
 492         }
 493         rcu_read_unlock();
 494         return NULL;
 495 }
 496
 497 static void bnxt_re_dev_unprobe(struct net_device *netdev,
 498                                 struct bnxt_en_dev *en_dev)
 499 {
 500         dev_put(netdev);
 501         module_put(en_dev->pdev->driver->driver.owner);
 502 }
 503
 504 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 505 {
 506         struct bnxt *bp = netdev_priv(netdev);
 507         struct bnxt_en_dev *en_dev;
 508         struct pci_dev *pdev;
 509
 510         /* Call bnxt_en's RoCE probe via indirect API */
 511         if (!bp->ulp_probe)
 512                 return ERR_PTR(-EINVAL);
 513
 514         en_dev = bp->ulp_probe(netdev);
 515         if (IS_ERR(en_dev))
 516                 return en_dev;
 517
 518         pdev = en_dev->pdev;
 519         if (!pdev)
 520                 return ERR_PTR(-EINVAL);
 521
 522         if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
 523                 dev_info(&pdev->dev,
 524                         "%s: probe error: RoCE is not supported on this device",
 525                         ROCE_DRV_MODULE_NAME);
 526                 return ERR_PTR(-ENODEV);
 527         }
 528
 529         /* Bump net device reference count */
 530         if (!try_module_get(pdev->driver->driver.owner))
 531                 return ERR_PTR(-ENODEV);
 532
 533         dev_hold(netdev);
 534
 535         return en_dev;
 536 }
 537
 538 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 539                            char *buf)
 540 {
 541         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 542
 543         return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 544 }
 545 static DEVICE_ATTR_RO(hw_rev);
 546
 547 static ssize_t hca_type_show(struct device *device,
 548                              struct device_attribute *attr, char *buf)
 549 {
 550         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 551
 552         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
 553 }
 554 static DEVICE_ATTR_RO(hca_type);
 555
 556 static struct attribute *bnxt_re_attributes[] = {
 557         &dev_attr_hw_rev.attr,
 558         &dev_attr_hca_type.attr,
 559         NULL
 560 };
 561
 562 static const struct attribute_group bnxt_re_dev_attr_group = {
 563         .attrs = bnxt_re_attributes,
 564 };
 565
 566 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
 567 {
 568         ib_unregister_device(&rdev->ibdev);
 569 }
 570
 571 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 572 {
 573         struct ib_device *ibdev = &rdev->ibdev;
 574
 575         /* ib device init */
 576         ibdev->owner = THIS_MODULE;
 577         ibdev->node_type = RDMA_NODE_IB_CA;
 578         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 579                 strlen(BNXT_RE_DESC) + 5);
 580         ibdev->phys_port_cnt = 1;
 581
 582         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 583
 584         ibdev->num_comp_vectors = 1;
 585         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 586         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 587
 588         /* User space */
 589         ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
 590         ibdev->uverbs_cmd_mask =
 591                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 592                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 593                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 594                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 595                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 596                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 597                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 598                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 599                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 600                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 601                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 602                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 603                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 604                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 605                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 606                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 607                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 608                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 609                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 610                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 611                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 612                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 613                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 614                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 615         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 616
 617         /* Kernel verbs */
 618         ibdev->query_device             = bnxt_re_query_device;
 619         ibdev->modify_device            = bnxt_re_modify_device;
 620
 621         ibdev->query_port               = bnxt_re_query_port;
 622         ibdev->get_port_immutable       = bnxt_re_get_port_immutable;
 623         ibdev->get_dev_fw_str           = bnxt_re_query_fw_str;
 624         ibdev->query_pkey               = bnxt_re_query_pkey;
 625         ibdev->get_netdev               = bnxt_re_get_netdev;
 626         ibdev->add_gid                  = bnxt_re_add_gid;
 627         ibdev->del_gid                  = bnxt_re_del_gid;
 628         ibdev->get_link_layer           = bnxt_re_get_link_layer;
 629
 630         ibdev->alloc_pd                 = bnxt_re_alloc_pd;
 631         ibdev->dealloc_pd               = bnxt_re_dealloc_pd;
 632
 633         ibdev->create_ah                = bnxt_re_create_ah;
 634         ibdev->modify_ah                = bnxt_re_modify_ah;
 635         ibdev->query_ah                 = bnxt_re_query_ah;
 636         ibdev->destroy_ah               = bnxt_re_destroy_ah;
 637
 638         ibdev->create_srq               = bnxt_re_create_srq;
 639         ibdev->modify_srq               = bnxt_re_modify_srq;
 640         ibdev->query_srq                = bnxt_re_query_srq;
 641         ibdev->destroy_srq              = bnxt_re_destroy_srq;
 642         ibdev->post_srq_recv            = bnxt_re_post_srq_recv;
 643
 644         ibdev->create_qp                = bnxt_re_create_qp;
 645         ibdev->modify_qp                = bnxt_re_modify_qp;
 646         ibdev->query_qp                 = bnxt_re_query_qp;
 647         ibdev->destroy_qp               = bnxt_re_destroy_qp;
 648
 649         ibdev->post_send                = bnxt_re_post_send;
 650         ibdev->post_recv                = bnxt_re_post_recv;
 651
 652         ibdev->create_cq                = bnxt_re_create_cq;
 653         ibdev->destroy_cq               = bnxt_re_destroy_cq;
 654         ibdev->poll_cq                  = bnxt_re_poll_cq;
 655         ibdev->req_notify_cq            = bnxt_re_req_notify_cq;
 656
 657         ibdev->get_dma_mr               = bnxt_re_get_dma_mr;
 658         ibdev->dereg_mr                 = bnxt_re_dereg_mr;
 659         ibdev->alloc_mr                 = bnxt_re_alloc_mr;
 660         ibdev->map_mr_sg                = bnxt_re_map_mr_sg;
 661
 662         ibdev->reg_user_mr              = bnxt_re_reg_user_mr;
 663         ibdev->alloc_ucontext           = bnxt_re_alloc_ucontext;
 664         ibdev->dealloc_ucontext         = bnxt_re_dealloc_ucontext;
 665         ibdev->mmap                     = bnxt_re_mmap;
 666         ibdev->get_hw_stats             = bnxt_re_ib_get_hw_stats;
 667         ibdev->alloc_hw_stats           = bnxt_re_ib_alloc_hw_stats;
 668
 669         rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group);
 670         ibdev->driver_id = RDMA_DRIVER_BNXT_RE;
 671         return ib_register_device(ibdev, "bnxt_re%d", NULL);
 672 }
 673
 674 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 675 {
 676         dev_put(rdev->netdev);
 677         rdev->netdev = NULL;
 678
 679         mutex_lock(&bnxt_re_dev_lock);
 680         list_del_rcu(&rdev->list);
 681         mutex_unlock(&bnxt_re_dev_lock);
 682
 683         synchronize_rcu();
 684
 685         ib_dealloc_device(&rdev->ibdev);
 686         /* rdev is gone */
 687 }
 688
 689 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 690                                            struct bnxt_en_dev *en_dev)
 691 {
 692         struct bnxt_re_dev *rdev;
 693
 694         /* Allocate bnxt_re_dev instance here */
 695         rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
 696         if (!rdev) {
 697                 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 698                         ROCE_DRV_MODULE_NAME);
 699                 return NULL;
 700         }
 701         /* Default values */
 702         rdev->netdev = netdev;
 703         dev_hold(rdev->netdev);
 704         rdev->en_dev = en_dev;
 705         rdev->id = rdev->en_dev->pdev->devfn;
 706         INIT_LIST_HEAD(&rdev->qp_list);
 707         mutex_init(&rdev->qp_lock);
 708         atomic_set(&rdev->qp_count, 0);
 709         atomic_set(&rdev->cq_count, 0);
 710         atomic_set(&rdev->srq_count, 0);
 711         atomic_set(&rdev->mr_count, 0);
 712         atomic_set(&rdev->mw_count, 0);
 713         rdev->cosq[0] = 0xFFFF;
 714         rdev->cosq[1] = 0xFFFF;
 715
 716         mutex_lock(&bnxt_re_dev_lock);
 717         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 718         mutex_unlock(&bnxt_re_dev_lock);
 719         return rdev;
 720 }
 721
 722 static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
 723                                              *unaffi_async)
 724 {
 725         switch (unaffi_async->event) {
 726         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 727                 break;
 728         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 729                 break;
 730         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 731                 break;
 732         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 733                 break;
 734         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 735                 break;
 736         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 737                 break;
 738         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 739                 break;
 740         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 741                 break;
 742         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 743                 break;
 744         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 745                 break;
 746         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 747                 break;
 748         default:
 749                 return -EINVAL;
 750         }
 751         return 0;
 752 }
 753
 754 static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 755                                          struct bnxt_re_qp *qp)
 756 {
 757         struct ib_event event;
 758         unsigned int flags;
 759
 760         if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 761                 flags = bnxt_re_lock_cqs(qp);
 762                 bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 763                 bnxt_re_unlock_cqs(qp, flags);
 764         }
 765
 766         memset(&event, 0, sizeof(event));
 767         if (qp->qplib_qp.srq) {
 768                 event.device = &qp->rdev->ibdev;
 769                 event.element.qp = &qp->ib_qp;
 770                 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 771         }
 772
 773         if (event.device && qp->ib_qp.event_handler)
 774                 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
 775
 776         return 0;
 777 }
 778
 779 static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
 780                                            void *obj)
 781 {
 782         int rc = 0;
 783         u8 event;
 784
 785         if (!obj)
 786                 return rc; /* QP was already dead, still return success */
 787
 788         event = affi_async->event;
 789         if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) {
 790                 struct bnxt_qplib_qp *lib_qp = obj;
 791                 struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp,
 792                                                      qplib_qp);
 793                 rc = bnxt_re_handle_qp_async_event(affi_async, qp);
 794         }
 795         return rc;
 796 }
 797
 798 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 799                                void *aeqe, void *obj)
 800 {
 801         struct creq_qp_event *affi_async;
 802         struct creq_func_event *unaffi_async;
 803         u8 type;
 804         int rc;
 805
 806         type = ((struct creq_base *)aeqe)->type;
 807         if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
 808                 unaffi_async = aeqe;
 809                 rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
 810         } else {
 811                 affi_async = aeqe;
 812                 rc = bnxt_re_handle_affi_async_event(affi_async, obj);
 813         }
 814
 815         return rc;
 816 }
 817
 818 static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
 819                                 struct bnxt_qplib_srq *handle, u8 event)
 820 {
 821         struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
 822                                                qplib_srq);
 823         struct ib_event ib_event;
 824         int rc = 0;
 825
 826         if (!srq) {
 827                 dev_err(NULL, "%s: SRQ is NULL, SRQN not handled",
 828                         ROCE_DRV_MODULE_NAME);
 829                 rc = -EINVAL;
 830                 goto done;
 831         }
 832         ib_event.device = &srq->rdev->ibdev;
 833         ib_event.element.srq = &srq->ib_srq;
 834         if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
 835                 ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
 836         else
 837                 ib_event.event = IB_EVENT_SRQ_ERR;
 838
 839         if (srq->ib_srq.event_handler) {
 840                 /* Lock event_handler? */
 841                 (*srq->ib_srq.event_handler)(&ib_event,
 842                                              srq->ib_srq.srq_context);
 843         }
 844 done:
 845         return rc;
 846 }
 847
 848 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 849                                struct bnxt_qplib_cq *handle)
 850 {
 851         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 852                                              qplib_cq);
 853
 854         if (!cq) {
 855                 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
 856                         ROCE_DRV_MODULE_NAME);
 857                 return -EINVAL;
 858         }
 859         if (cq->ib_cq.comp_handler) {
 860                 /* Lock comp_handler? */
 861                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 862         }
 863
 864         return 0;
 865 }
 866
 867 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 868 {
 869         int i;
 870
 871         for (i = 1; i < rdev->num_msix; i++)
 872                 bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
 873
 874         if (rdev->qplib_res.rcfw)
 875                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 876 }
 877
 878 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 879 {
 880         int rc = 0, i;
 881         int num_vec_enabled = 0;
 882
 883         bnxt_qplib_init_res(&rdev->qplib_res);
 884
 885         for (i = 1; i < rdev->num_msix ; i++) {
 886                 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
 887                                           i - 1, rdev->msix_entries[i].vector,
 888                                           rdev->msix_entries[i].db_offset,
 889                                           &bnxt_re_cqn_handler,
 890                                           &bnxt_re_srqn_handler);
 891
 892                 if (rc) {
 893                         dev_err(rdev_to_dev(rdev),
 894                                 "Failed to enable NQ with rc = 0x%x", rc);
 895                         goto fail;
 896                 }
 897                 num_vec_enabled++;
 898         }
 899         return 0;
 900 fail:
 901         for (i = num_vec_enabled; i >= 0; i--)
 902                 bnxt_qplib_disable_nq(&rdev->nq[i]);
 903
 904         return rc;
 905 }
 906
 907 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev)
 908 {
 909         int i;
 910
 911         for (i = 0; i < rdev->num_msix - 1; i++) {
 912                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
 913                 bnxt_qplib_free_nq(&rdev->nq[i]);
 914         }
 915 }
 916
 917 static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
 918 {
 919         bnxt_re_free_nq_res(rdev);
 920
 921         if (rdev->qplib_res.dpi_tbl.max) {
 922                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 923                                        &rdev->qplib_res.dpi_tbl,
 924                                        &rdev->dpi_privileged);
 925         }
 926         if (rdev->qplib_res.rcfw) {
 927                 bnxt_qplib_free_res(&rdev->qplib_res);
 928                 rdev->qplib_res.rcfw = NULL;
 929         }
 930 }
 931
 932 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 933 {
 934         int rc = 0, i;
 935         int num_vec_created = 0;
 936
 937         /* Configure and allocate resources for qplib */
 938         rdev->qplib_res.rcfw = &rdev->rcfw;
 939         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
 940                                      rdev->is_virtfn);
 941         if (rc)
 942                 goto fail;
 943
 944         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
 945                                   rdev->netdev, &rdev->dev_attr);
 946         if (rc)
 947                 goto fail;
 948
 949         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 950                                   &rdev->dpi_privileged,
 951                                   rdev);
 952         if (rc)
 953                 goto dealloc_res;
 954
 955         for (i = 0; i < rdev->num_msix - 1; i++) {
 956                 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
 957                         BNXT_RE_MAX_SRQC_COUNT + 2;
 958                 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]);
 959                 if (rc) {
 960                         dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x",
 961                                 i, rc);
 962                         goto free_nq;
 963                 }
 964                 rc = bnxt_re_net_ring_alloc
 965                         (rdev, rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr,
 966                          rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count,
 967                          HWRM_RING_ALLOC_CMPL,
 968                          BNXT_QPLIB_NQE_MAX_CNT - 1,
 969                          rdev->msix_entries[i + 1].ring_idx,
 970                          &rdev->nq[i].ring_id);
 971                 if (rc) {
 972                         dev_err(rdev_to_dev(rdev),
 973                                 "Failed to allocate NQ fw id with rc = 0x%x",
 974                                 rc);
 975                         bnxt_qplib_free_nq(&rdev->nq[i]);
 976                         goto free_nq;
 977                 }
 978                 num_vec_created++;
 979         }
 980         return 0;
 981 free_nq:
 982         for (i = num_vec_created; i >= 0; i--) {
 983                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
 984                 bnxt_qplib_free_nq(&rdev->nq[i]);
 985         }
 986         bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 987                                &rdev->qplib_res.dpi_tbl,
 988                                &rdev->dpi_privileged);
 989 dealloc_res:
 990         bnxt_qplib_free_res(&rdev->qplib_res);
 991
 992 fail:
 993         rdev->qplib_res.rcfw = NULL;
 994         return rc;
 995 }
 996
 997 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
 998                                    u8 port_num, enum ib_event_type event)
 999 {
1000         struct ib_event ib_event;
1001
1002         ib_event.device = ibdev;
1003         if (qp) {
1004                 ib_event.element.qp = qp;
1005                 ib_event.event = event;
1006                 if (qp->event_handler)
1007                         qp->event_handler(&ib_event, qp->qp_context);
1008
1009         } else {
1010                 ib_event.element.port_num = port_num;
1011                 ib_event.event = event;
1012                 ib_dispatch_event(&ib_event);
1013         }
1014 }
1015
1016 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
1017 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
1018                                       u64 *cid_map)
1019 {
1020         struct hwrm_queue_pri2cos_qcfg_input req = {0};
1021         struct bnxt *bp = netdev_priv(rdev->netdev);
1022         struct hwrm_queue_pri2cos_qcfg_output resp;
1023         struct bnxt_en_dev *en_dev = rdev->en_dev;
1024         struct bnxt_fw_msg fw_msg;
1025         u32 flags = 0;
1026         u8 *qcfgmap, *tmp_map;
1027         int rc = 0, i;
1028
1029         if (!cid_map)
1030                 return -EINVAL;
1031
1032         memset(&fw_msg, 0, sizeof(fw_msg));
1033         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
1034                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
1035         flags |= (dir & 0x01);
1036         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
1037         req.flags = cpu_to_le32(flags);
1038         req.port_id = bp->pf.port_id;
1039
1040         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1041                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1042         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
1043         if (rc)
1044                 return rc;
1045
1046         if (resp.queue_cfg_info) {
1047                 dev_warn(rdev_to_dev(rdev),
1048                          "Asymmetric cos queue configuration detected");
1049                 dev_warn(rdev_to_dev(rdev),
1050                          " on device, QoS may not be fully functional\n");
1051         }
1052         qcfgmap = &resp.pri0_cos_queue_id;
1053         tmp_map = (u8 *)cid_map;
1054         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
1055                 tmp_map[i] = qcfgmap[i];
1056
1057         return rc;
1058 }
1059
1060 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
1061                                         struct bnxt_re_qp *qp)
1062 {
1063         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
1064 }
1065
1066 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
1067 {
1068         int mask = IB_QP_STATE;
1069         struct ib_qp_attr qp_attr;
1070         struct bnxt_re_qp *qp;
1071
1072         qp_attr.qp_state = IB_QPS_ERR;
1073         mutex_lock(&rdev->qp_lock);
1074         list_for_each_entry(qp, &rdev->qp_list, list) {
1075                 /* Modify the state of all QPs except QP1/Shadow QP */
1076                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
1077                         if (qp->qplib_qp.state !=
1078                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
1079                             qp->qplib_qp.state !=
1080                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1081                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
1082                                                        1, IB_EVENT_QP_FATAL);
1083                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
1084                                                   NULL);
1085                         }
1086                 }
1087         }
1088         mutex_unlock(&rdev->qp_lock);
1089 }
1090
1091 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
1092 {
1093         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
1094         struct bnxt_qplib_gid gid;
1095         u16 gid_idx, index;
1096         int rc = 0;
1097
1098         if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1099                 return 0;
1100
1101         if (!sgid_tbl) {
1102                 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
1103                 return -EINVAL;
1104         }
1105
1106         for (index = 0; index < sgid_tbl->active; index++) {
1107                 gid_idx = sgid_tbl->hw_id[index];
1108
1109                 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
1110                             sizeof(bnxt_qplib_gid_zero)))
1111                         continue;
1112                 /* need to modify the VLAN enable setting of non VLAN GID only
1113                  * as setting is done for VLAN GID while adding GID
1114                  */
1115                 if (sgid_tbl->vlan[index])
1116                         continue;
1117
1118                 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
1119
1120                 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
1121                                             rdev->qplib_res.netdev->dev_addr);
1122         }
1123
1124         return rc;
1125 }
1126
1127 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
1128 {
1129         u32 prio_map = 0, tmp_map = 0;
1130         struct net_device *netdev;
1131         struct dcb_app app;
1132
1133         netdev = rdev->netdev;
1134
1135         memset(&app, 0, sizeof(app));
1136         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
1137         app.protocol = ETH_P_IBOE;
1138         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1139         prio_map = tmp_map;
1140
1141         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
1142         app.protocol = ROCE_V2_UDP_DPORT;
1143         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1144         prio_map |= tmp_map;
1145
1146         return prio_map;
1147 }
1148
1149 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
1150 {
1151         u16 prio;
1152         u8 id;
1153
1154         for (prio = 0, id = 0; prio < 8; prio++) {
1155                 if (prio_map & (1 << prio)) {
1156                         cosq[id] = cid_map[prio];
1157                         id++;
1158                         if (id == 2) /* Max 2 tcs supported */
1159                                 break;
1160                 }
1161         }
1162 }
1163
1164 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
1165 {
1166         u8 prio_map = 0;
1167         u64 cid_map;
1168         int rc;
1169
1170         /* Get priority for roce */
1171         prio_map = bnxt_re_get_priority_mask(rdev);
1172
1173         if (prio_map == rdev->cur_prio_map)
1174                 return 0;
1175         rdev->cur_prio_map = prio_map;
1176         /* Get cosq id for this priority */
1177         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
1178         if (rc) {
1179                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
1180                 return rc;
1181         }
1182         /* Parse CoS IDs for app priority */
1183         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
1184
1185         /* Config BONO. */
1186         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
1187         if (rc) {
1188                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
1189                          rdev->cosq[0], rdev->cosq[1]);
1190                 return rc;
1191         }
1192
1193         /* Actual priorities are not programmed as they are already
1194          * done by L2 driver; just enable or disable priority vlan tagging
1195          */
1196         if ((prio_map == 0 && rdev->qplib_res.prio) ||
1197             (prio_map != 0 && !rdev->qplib_res.prio)) {
1198                 rdev->qplib_res.prio = prio_map ? true : false;
1199
1200                 bnxt_re_update_gid(rdev);
1201         }
1202
1203         return 0;
1204 }
1205
1206 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev)
1207 {
1208         int rc;
1209
1210         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
1211                 /* Cleanup ib dev */
1212                 bnxt_re_unregister_ib(rdev);
1213         }
1214         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1215                 cancel_delayed_work_sync(&rdev->worker);
1216
1217         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED,
1218                                &rdev->flags))
1219                 bnxt_re_cleanup_res(rdev);
1220         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags))
1221                 bnxt_re_free_res(rdev);
1222
1223         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1224                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1225                 if (rc)
1226                         dev_warn(rdev_to_dev(rdev),
1227                                  "Failed to deinitialize RCFW: %#x", rc);
1228                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1229                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1230                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1231                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1232                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1233         }
1234         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1235                 rc = bnxt_re_free_msix(rdev);
1236                 if (rc)
1237                         dev_warn(rdev_to_dev(rdev),
1238                                  "Failed to free MSI-X vectors: %#x", rc);
1239         }
1240         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1241                 rc = bnxt_re_unregister_netdev(rdev);
1242                 if (rc)
1243                         dev_warn(rdev_to_dev(rdev),
1244                                  "Failed to unregister with netdev: %#x", rc);
1245         }
1246 }
1247
1248 /* worker thread for polling periodic events. Now used for QoS programming*/
1249 static void bnxt_re_worker(struct work_struct *work)
1250 {
1251         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1252                                                 worker.work);
1253
1254         bnxt_re_setup_qos(rdev);
1255         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1256 }
1257
1258 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
1259 {
1260         int rc;
1261
1262         bool locked;
1263
1264         /* Acquire rtnl lock through out this function */
1265         rtnl_lock();
1266         locked = true;
1267
1268         /* Registered a new RoCE device instance to netdev */
1269         rc = bnxt_re_register_netdev(rdev);
1270         if (rc) {
1271                 rtnl_unlock();
1272                 pr_err("Failed to register with netedev: %#x\n", rc);
1273                 return -EINVAL;
1274         }
1275         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1276
1277         /* Check whether VF or PF */
1278         bnxt_re_get_sriov_func_type(rdev);
1279
1280         rc = bnxt_re_request_msix(rdev);
1281         if (rc) {
1282                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
1283                 rc = -EINVAL;
1284                 goto fail;
1285         }
1286         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1287
1288         /* Establish RCFW Communication Channel to initialize the context
1289          * memory for the function and all child VFs
1290          */
1291         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1292                                            BNXT_RE_MAX_QPC_COUNT);
1293         if (rc) {
1294                 pr_err("Failed to allocate RCFW Channel: %#x\n", rc);
1295                 goto fail;
1296         }
1297         rc = bnxt_re_net_ring_alloc
1298                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1299                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1300                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1301                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1302                          &rdev->rcfw.creq_ring_id);
1303         if (rc) {
1304                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1305                 goto free_rcfw;
1306         }
1307         rc = bnxt_qplib_enable_rcfw_channel
1308                                 (rdev->en_dev->pdev, &rdev->rcfw,
1309                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1310                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1311                                  rdev->is_virtfn, &bnxt_re_aeq_handler);
1312         if (rc) {
1313                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1314                 goto free_ring;
1315         }
1316
1317         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
1318                                      rdev->is_virtfn);
1319         if (rc)
1320                 goto disable_rcfw;
1321         if (!rdev->is_virtfn)
1322                 bnxt_re_set_resource_limits(rdev);
1323
1324         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1325         if (rc) {
1326                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1327                 goto disable_rcfw;
1328         }
1329         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1330                                          rdev->qplib_ctx.stats.dma_map,
1331                                          &rdev->qplib_ctx.stats.fw_id);
1332         if (rc) {
1333                 pr_err("Failed to allocate stats context: %#x\n", rc);
1334                 goto free_ctx;
1335         }
1336
1337         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
1338                                   rdev->is_virtfn);
1339         if (rc) {
1340                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1341                 goto free_sctx;
1342         }
1343         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1344
1345         /* Resources based on the 'new' device caps */
1346         rc = bnxt_re_alloc_res(rdev);
1347         if (rc) {
1348                 pr_err("Failed to allocate resources: %#x\n", rc);
1349                 goto fail;
1350         }
1351         set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags);
1352         rc = bnxt_re_init_res(rdev);
1353         if (rc) {
1354                 pr_err("Failed to initialize resources: %#x\n", rc);
1355                 goto fail;
1356         }
1357
1358         set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags);
1359
1360         if (!rdev->is_virtfn) {
1361                 rc = bnxt_re_setup_qos(rdev);
1362                 if (rc)
1363                         pr_info("RoCE priority not yet configured\n");
1364
1365                 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1366                 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1367                 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1368         }
1369
1370         rtnl_unlock();
1371         locked = false;
1372
1373         /* Register ib dev */
1374         rc = bnxt_re_register_ib(rdev);
1375         if (rc) {
1376                 pr_err("Failed to register with IB: %#x\n", rc);
1377                 goto fail;
1378         }
1379         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1380         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1381         ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1382                          &rdev->active_width);
1383         set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
1384         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1385         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1386
1387         return 0;
1388 free_sctx:
1389         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1390 free_ctx:
1391         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1392 disable_rcfw:
1393         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1394 free_ring:
1395         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1396 free_rcfw:
1397         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1398 fail:
1399         if (!locked)
1400                 rtnl_lock();
1401         bnxt_re_ib_unreg(rdev);
1402         rtnl_unlock();
1403
1404         return rc;
1405 }
1406
1407 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1408 {
1409         struct bnxt_en_dev *en_dev = rdev->en_dev;
1410         struct net_device *netdev = rdev->netdev;
1411
1412         bnxt_re_dev_remove(rdev);
1413
1414         if (netdev)
1415                 bnxt_re_dev_unprobe(netdev, en_dev);
1416 }
1417
1418 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1419 {
1420         struct bnxt_en_dev *en_dev;
1421         int rc = 0;
1422
1423         if (!is_bnxt_re_dev(netdev))
1424                 return -ENODEV;
1425
1426         en_dev = bnxt_re_dev_probe(netdev);
1427         if (IS_ERR(en_dev)) {
1428                 if (en_dev != ERR_PTR(-ENODEV))
1429                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1430                 rc = PTR_ERR(en_dev);
1431                 goto exit;
1432         }
1433         *rdev = bnxt_re_dev_add(netdev, en_dev);
1434         if (!*rdev) {
1435                 rc = -ENOMEM;
1436                 bnxt_re_dev_unprobe(netdev, en_dev);
1437                 goto exit;
1438         }
1439 exit:
1440         return rc;
1441 }
1442
1443 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1444 {
1445         pci_dev_put(rdev->en_dev->pdev);
1446 }
1447
1448 /* Handle all deferred netevents tasks */
1449 static void bnxt_re_task(struct work_struct *work)
1450 {
1451         struct bnxt_re_work *re_work;
1452         struct bnxt_re_dev *rdev;
1453         int rc = 0;
1454
1455         re_work = container_of(work, struct bnxt_re_work, work);
1456         rdev = re_work->rdev;
1457
1458         if (re_work->event != NETDEV_REGISTER &&
1459             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1460                 return;
1461
1462         switch (re_work->event) {
1463         case NETDEV_REGISTER:
1464                 rc = bnxt_re_ib_reg(rdev);
1465                 if (rc) {
1466                         dev_err(rdev_to_dev(rdev),
1467                                 "Failed to register with IB: %#x", rc);
1468                         bnxt_re_remove_one(rdev);
1469                         bnxt_re_dev_unreg(rdev);
1470                         goto exit;
1471                 }
1472                 break;
1473         case NETDEV_UP:
1474                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1475                                        IB_EVENT_PORT_ACTIVE);
1476                 break;
1477         case NETDEV_DOWN:
1478                 bnxt_re_dev_stop(rdev);
1479                 break;
1480         case NETDEV_CHANGE:
1481                 if (!netif_carrier_ok(rdev->netdev))
1482                         bnxt_re_dev_stop(rdev);
1483                 else if (netif_carrier_ok(rdev->netdev))
1484                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1485                                                IB_EVENT_PORT_ACTIVE);
1486                 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1487                                  &rdev->active_width);
1488                 break;
1489         default:
1490                 break;
1491         }
1492         smp_mb__before_atomic();
1493         atomic_dec(&rdev->sched_count);
1494 exit:
1495         kfree(re_work);
1496 }
1497
1498 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1499 {
1500         pci_dev_get(rdev->en_dev->pdev);
1501 }
1502
1503 /*
1504  * "Notifier chain callback can be invoked for the same chain from
1505  * different CPUs at the same time".
1506  *
1507  * For cases when the netdev is already present, our call to the
1508  * register_netdevice_notifier() will actually get the rtnl_lock()
1509  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1510  * events.
1511  *
1512  * But for cases when the netdev is not already present, the notifier
1513  * chain is subjected to be invoked from different CPUs simultaneously.
1514  *
1515  * This is protected by the netdev_mutex.
1516  */
1517 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1518                                 unsigned long event, void *ptr)
1519 {
1520         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1521         struct bnxt_re_work *re_work;
1522         struct bnxt_re_dev *rdev;
1523         int rc = 0;
1524         bool sch_work = false;
1525
1526         real_dev = rdma_vlan_dev_real_dev(netdev);
1527         if (!real_dev)
1528                 real_dev = netdev;
1529
1530         rdev = bnxt_re_from_netdev(real_dev);
1531         if (!rdev && event != NETDEV_REGISTER)
1532                 goto exit;
1533         if (real_dev != netdev)
1534                 goto exit;
1535
1536         switch (event) {
1537         case NETDEV_REGISTER:
1538                 if (rdev)
1539                         break;
1540                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1541                 if (rc == -ENODEV)
1542                         break;
1543                 if (rc) {
1544                         pr_err("Failed to register with the device %s: %#x\n",
1545                                real_dev->name, rc);
1546                         break;
1547                 }
1548                 bnxt_re_init_one(rdev);
1549                 sch_work = true;
1550                 break;
1551
1552         case NETDEV_UNREGISTER:
1553                 /* netdev notifier will call NETDEV_UNREGISTER again later since
1554                  * we are still holding the reference to the netdev
1555                  */
1556                 if (atomic_read(&rdev->sched_count) > 0)
1557                         goto exit;
1558                 bnxt_re_ib_unreg(rdev);
1559                 bnxt_re_remove_one(rdev);
1560                 bnxt_re_dev_unreg(rdev);
1561                 break;
1562
1563         default:
1564                 sch_work = true;
1565                 break;
1566         }
1567         if (sch_work) {
1568                 /* Allocate for the deferred task */
1569                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1570                 if (re_work) {
1571                         re_work->rdev = rdev;
1572                         re_work->event = event;
1573                         re_work->vlan_dev = (real_dev == netdev ?
1574                                              NULL : netdev);
1575                         INIT_WORK(&re_work->work, bnxt_re_task);
1576                         atomic_inc(&rdev->sched_count);
1577                         queue_work(bnxt_re_wq, &re_work->work);
1578                 }
1579         }
1580
1581 exit:
1582         return NOTIFY_DONE;
1583 }
1584
1585 static struct notifier_block bnxt_re_netdev_notifier = {
1586         .notifier_call = bnxt_re_netdev_event
1587 };
1588
1589 static int __init bnxt_re_mod_init(void)
1590 {
1591         int rc = 0;
1592
1593         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1594
1595         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1596         if (!bnxt_re_wq)
1597                 return -ENOMEM;
1598
1599         INIT_LIST_HEAD(&bnxt_re_dev_list);
1600
1601         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1602         if (rc) {
1603                 pr_err("%s: Cannot register to netdevice_notifier",
1604                        ROCE_DRV_MODULE_NAME);
1605                 goto err_netdev;
1606         }
1607         return 0;
1608
1609 err_netdev:
1610         destroy_workqueue(bnxt_re_wq);
1611
1612         return rc;
1613 }
1614
1615 static void __exit bnxt_re_mod_exit(void)
1616 {
1617         struct bnxt_re_dev *rdev, *next;
1618         LIST_HEAD(to_be_deleted);
1619
1620         mutex_lock(&bnxt_re_dev_lock);
1621         /* Free all adapter allocated resources */
1622         if (!list_empty(&bnxt_re_dev_list))
1623                 list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
1624         mutex_unlock(&bnxt_re_dev_lock);
1625        /*
1626         * Cleanup the devices in reverse order so that the VF device
1627         * cleanup is done before PF cleanup
1628         */
1629         list_for_each_entry_safe_reverse(rdev, next, &to_be_deleted, list) {
1630                 dev_info(rdev_to_dev(rdev), "Unregistering Device");
1631                 /*
1632                  * Flush out any scheduled tasks before destroying the
1633                  * resources
1634                  */
1635                 flush_workqueue(bnxt_re_wq);
1636                 bnxt_re_dev_stop(rdev);
1637                 /* Acquire the rtnl_lock as the L2 resources are freed here */
1638                 rtnl_lock();
1639                 bnxt_re_ib_unreg(rdev);
1640                 rtnl_unlock();
1641                 bnxt_re_remove_one(rdev);
1642                 bnxt_re_dev_unreg(rdev);
1643         }
1644         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1645         if (bnxt_re_wq)
1646                 destroy_workqueue(bnxt_re_wq);
1647 }
1648
1649 module_init(bnxt_re_mod_init);
1650 module_exit(bnxt_re_mod_exit);