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 <eddie.wai@broadcom.com>");
  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 const struct ib_device_ops bnxt_re_dev_ops = {
 572         .add_gid = bnxt_re_add_gid,
 573         .alloc_hw_stats = bnxt_re_ib_alloc_hw_stats,
 574         .alloc_mr = bnxt_re_alloc_mr,
 575         .alloc_pd = bnxt_re_alloc_pd,
 576         .alloc_ucontext = bnxt_re_alloc_ucontext,
 577         .create_ah = bnxt_re_create_ah,
 578         .create_cq = bnxt_re_create_cq,
 579         .create_qp = bnxt_re_create_qp,
 580         .create_srq = bnxt_re_create_srq,
 581         .dealloc_pd = bnxt_re_dealloc_pd,
 582         .dealloc_ucontext = bnxt_re_dealloc_ucontext,
 583         .del_gid = bnxt_re_del_gid,
 584         .dereg_mr = bnxt_re_dereg_mr,
 585         .destroy_ah = bnxt_re_destroy_ah,
 586         .destroy_cq = bnxt_re_destroy_cq,
 587         .destroy_qp = bnxt_re_destroy_qp,
 588         .destroy_srq = bnxt_re_destroy_srq,
 589         .get_dev_fw_str = bnxt_re_query_fw_str,
 590         .get_dma_mr = bnxt_re_get_dma_mr,
 591         .get_hw_stats = bnxt_re_ib_get_hw_stats,
 592         .get_link_layer = bnxt_re_get_link_layer,
 593         .get_netdev = bnxt_re_get_netdev,
 594         .get_port_immutable = bnxt_re_get_port_immutable,
 595         .map_mr_sg = bnxt_re_map_mr_sg,
 596         .mmap = bnxt_re_mmap,
 597         .modify_ah = bnxt_re_modify_ah,
 598         .modify_device = bnxt_re_modify_device,
 599         .modify_qp = bnxt_re_modify_qp,
 600         .modify_srq = bnxt_re_modify_srq,
 601         .poll_cq = bnxt_re_poll_cq,
 602         .post_recv = bnxt_re_post_recv,
 603         .post_send = bnxt_re_post_send,
 604         .post_srq_recv = bnxt_re_post_srq_recv,
 605         .query_ah = bnxt_re_query_ah,
 606         .query_device = bnxt_re_query_device,
 607         .query_pkey = bnxt_re_query_pkey,
 608         .query_port = bnxt_re_query_port,
 609         .query_qp = bnxt_re_query_qp,
 610         .query_srq = bnxt_re_query_srq,
 611         .reg_user_mr = bnxt_re_reg_user_mr,
 612         .req_notify_cq = bnxt_re_req_notify_cq,
 613 };
 614
 615 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 616 {
 617         struct ib_device *ibdev = &rdev->ibdev;
 618
 619         /* ib device init */
 620         ibdev->owner = THIS_MODULE;
 621         ibdev->node_type = RDMA_NODE_IB_CA;
 622         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 623                 strlen(BNXT_RE_DESC) + 5);
 624         ibdev->phys_port_cnt = 1;
 625
 626         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 627
 628         ibdev->num_comp_vectors = 1;
 629         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 630         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 631
 632         /* User space */
 633         ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
 634         ibdev->uverbs_cmd_mask =
 635                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 636                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 637                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 638                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 639                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 640                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 641                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 642                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 643                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 644                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 645                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 646                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 647                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 648                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 649                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 650                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 651                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 652                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 653                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 654                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 655                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 656                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 657                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 658                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 659         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 660
 661
 662         rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group);
 663         ibdev->driver_id = RDMA_DRIVER_BNXT_RE;
 664         ib_set_device_ops(ibdev, &bnxt_re_dev_ops);
 665         return ib_register_device(ibdev, "bnxt_re%d");
 666 }
 667
 668 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 669 {
 670         dev_put(rdev->netdev);
 671         rdev->netdev = NULL;
 672
 673         mutex_lock(&bnxt_re_dev_lock);
 674         list_del_rcu(&rdev->list);
 675         mutex_unlock(&bnxt_re_dev_lock);
 676
 677         synchronize_rcu();
 678
 679         ib_dealloc_device(&rdev->ibdev);
 680         /* rdev is gone */
 681 }
 682
 683 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 684                                            struct bnxt_en_dev *en_dev)
 685 {
 686         struct bnxt_re_dev *rdev;
 687
 688         /* Allocate bnxt_re_dev instance here */
 689         rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
 690         if (!rdev) {
 691                 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 692                         ROCE_DRV_MODULE_NAME);
 693                 return NULL;
 694         }
 695         /* Default values */
 696         rdev->netdev = netdev;
 697         dev_hold(rdev->netdev);
 698         rdev->en_dev = en_dev;
 699         rdev->id = rdev->en_dev->pdev->devfn;
 700         INIT_LIST_HEAD(&rdev->qp_list);
 701         mutex_init(&rdev->qp_lock);
 702         atomic_set(&rdev->qp_count, 0);
 703         atomic_set(&rdev->cq_count, 0);
 704         atomic_set(&rdev->srq_count, 0);
 705         atomic_set(&rdev->mr_count, 0);
 706         atomic_set(&rdev->mw_count, 0);
 707         rdev->cosq[0] = 0xFFFF;
 708         rdev->cosq[1] = 0xFFFF;
 709
 710         mutex_lock(&bnxt_re_dev_lock);
 711         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 712         mutex_unlock(&bnxt_re_dev_lock);
 713         return rdev;
 714 }
 715
 716 static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
 717                                              *unaffi_async)
 718 {
 719         switch (unaffi_async->event) {
 720         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 721                 break;
 722         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 723                 break;
 724         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 725                 break;
 726         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 727                 break;
 728         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 729                 break;
 730         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 731                 break;
 732         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 733                 break;
 734         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 735                 break;
 736         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 737                 break;
 738         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 739                 break;
 740         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 741                 break;
 742         default:
 743                 return -EINVAL;
 744         }
 745         return 0;
 746 }
 747
 748 static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 749                                          struct bnxt_re_qp *qp)
 750 {
 751         struct ib_event event;
 752         unsigned int flags;
 753
 754         if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 755                 flags = bnxt_re_lock_cqs(qp);
 756                 bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 757                 bnxt_re_unlock_cqs(qp, flags);
 758         }
 759
 760         memset(&event, 0, sizeof(event));
 761         if (qp->qplib_qp.srq) {
 762                 event.device = &qp->rdev->ibdev;
 763                 event.element.qp = &qp->ib_qp;
 764                 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 765         }
 766
 767         if (event.device && qp->ib_qp.event_handler)
 768                 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
 769
 770         return 0;
 771 }
 772
 773 static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
 774                                            void *obj)
 775 {
 776         int rc = 0;
 777         u8 event;
 778
 779         if (!obj)
 780                 return rc; /* QP was already dead, still return success */
 781
 782         event = affi_async->event;
 783         if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) {
 784                 struct bnxt_qplib_qp *lib_qp = obj;
 785                 struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp,
 786                                                      qplib_qp);
 787                 rc = bnxt_re_handle_qp_async_event(affi_async, qp);
 788         }
 789         return rc;
 790 }
 791
 792 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 793                                void *aeqe, void *obj)
 794 {
 795         struct creq_qp_event *affi_async;
 796         struct creq_func_event *unaffi_async;
 797         u8 type;
 798         int rc;
 799
 800         type = ((struct creq_base *)aeqe)->type;
 801         if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
 802                 unaffi_async = aeqe;
 803                 rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
 804         } else {
 805                 affi_async = aeqe;
 806                 rc = bnxt_re_handle_affi_async_event(affi_async, obj);
 807         }
 808
 809         return rc;
 810 }
 811
 812 static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
 813                                 struct bnxt_qplib_srq *handle, u8 event)
 814 {
 815         struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
 816                                                qplib_srq);
 817         struct ib_event ib_event;
 818         int rc = 0;
 819
 820         if (!srq) {
 821                 dev_err(NULL, "%s: SRQ is NULL, SRQN not handled",
 822                         ROCE_DRV_MODULE_NAME);
 823                 rc = -EINVAL;
 824                 goto done;
 825         }
 826         ib_event.device = &srq->rdev->ibdev;
 827         ib_event.element.srq = &srq->ib_srq;
 828         if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
 829                 ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
 830         else
 831                 ib_event.event = IB_EVENT_SRQ_ERR;
 832
 833         if (srq->ib_srq.event_handler) {
 834                 /* Lock event_handler? */
 835                 (*srq->ib_srq.event_handler)(&ib_event,
 836                                              srq->ib_srq.srq_context);
 837         }
 838 done:
 839         return rc;
 840 }
 841
 842 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 843                                struct bnxt_qplib_cq *handle)
 844 {
 845         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 846                                              qplib_cq);
 847
 848         if (!cq) {
 849                 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
 850                         ROCE_DRV_MODULE_NAME);
 851                 return -EINVAL;
 852         }
 853         if (cq->ib_cq.comp_handler) {
 854                 /* Lock comp_handler? */
 855                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 856         }
 857
 858         return 0;
 859 }
 860
 861 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 862 {
 863         int i;
 864
 865         for (i = 1; i < rdev->num_msix; i++)
 866                 bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
 867
 868         if (rdev->qplib_res.rcfw)
 869                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 870 }
 871
 872 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 873 {
 874         int rc = 0, i;
 875         int num_vec_enabled = 0;
 876
 877         bnxt_qplib_init_res(&rdev->qplib_res);
 878
 879         for (i = 1; i < rdev->num_msix ; i++) {
 880                 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
 881                                           i - 1, rdev->msix_entries[i].vector,
 882                                           rdev->msix_entries[i].db_offset,
 883                                           &bnxt_re_cqn_handler,
 884                                           &bnxt_re_srqn_handler);
 885
 886                 if (rc) {
 887                         dev_err(rdev_to_dev(rdev),
 888                                 "Failed to enable NQ with rc = 0x%x", rc);
 889                         goto fail;
 890                 }
 891                 num_vec_enabled++;
 892         }
 893         return 0;
 894 fail:
 895         for (i = num_vec_enabled; i >= 0; i--)
 896                 bnxt_qplib_disable_nq(&rdev->nq[i]);
 897
 898         return rc;
 899 }
 900
 901 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev)
 902 {
 903         int i;
 904
 905         for (i = 0; i < rdev->num_msix - 1; i++) {
 906                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
 907                 bnxt_qplib_free_nq(&rdev->nq[i]);
 908         }
 909 }
 910
 911 static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
 912 {
 913         bnxt_re_free_nq_res(rdev);
 914
 915         if (rdev->qplib_res.dpi_tbl.max) {
 916                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 917                                        &rdev->qplib_res.dpi_tbl,
 918                                        &rdev->dpi_privileged);
 919         }
 920         if (rdev->qplib_res.rcfw) {
 921                 bnxt_qplib_free_res(&rdev->qplib_res);
 922                 rdev->qplib_res.rcfw = NULL;
 923         }
 924 }
 925
 926 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 927 {
 928         int rc = 0, i;
 929         int num_vec_created = 0;
 930
 931         /* Configure and allocate resources for qplib */
 932         rdev->qplib_res.rcfw = &rdev->rcfw;
 933         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
 934                                      rdev->is_virtfn);
 935         if (rc)
 936                 goto fail;
 937
 938         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
 939                                   rdev->netdev, &rdev->dev_attr);
 940         if (rc)
 941                 goto fail;
 942
 943         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 944                                   &rdev->dpi_privileged,
 945                                   rdev);
 946         if (rc)
 947                 goto dealloc_res;
 948
 949         for (i = 0; i < rdev->num_msix - 1; i++) {
 950                 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
 951                         BNXT_RE_MAX_SRQC_COUNT + 2;
 952                 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]);
 953                 if (rc) {
 954                         dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x",
 955                                 i, rc);
 956                         goto free_nq;
 957                 }
 958                 rc = bnxt_re_net_ring_alloc
 959                         (rdev, rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr,
 960                          rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count,
 961                          HWRM_RING_ALLOC_CMPL,
 962                          BNXT_QPLIB_NQE_MAX_CNT - 1,
 963                          rdev->msix_entries[i + 1].ring_idx,
 964                          &rdev->nq[i].ring_id);
 965                 if (rc) {
 966                         dev_err(rdev_to_dev(rdev),
 967                                 "Failed to allocate NQ fw id with rc = 0x%x",
 968                                 rc);
 969                         bnxt_qplib_free_nq(&rdev->nq[i]);
 970                         goto free_nq;
 971                 }
 972                 num_vec_created++;
 973         }
 974         return 0;
 975 free_nq:
 976         for (i = num_vec_created; i >= 0; i--) {
 977                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
 978                 bnxt_qplib_free_nq(&rdev->nq[i]);
 979         }
 980         bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 981                                &rdev->qplib_res.dpi_tbl,
 982                                &rdev->dpi_privileged);
 983 dealloc_res:
 984         bnxt_qplib_free_res(&rdev->qplib_res);
 985
 986 fail:
 987         rdev->qplib_res.rcfw = NULL;
 988         return rc;
 989 }
 990
 991 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
 992                                    u8 port_num, enum ib_event_type event)
 993 {
 994         struct ib_event ib_event;
 995
 996         ib_event.device = ibdev;
 997         if (qp) {
 998                 ib_event.element.qp = qp;
 999                 ib_event.event = event;
1000                 if (qp->event_handler)
1001                         qp->event_handler(&ib_event, qp->qp_context);
1002
1003         } else {
1004                 ib_event.element.port_num = port_num;
1005                 ib_event.event = event;
1006                 ib_dispatch_event(&ib_event);
1007         }
1008 }
1009
1010 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
1011 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
1012                                       u64 *cid_map)
1013 {
1014         struct hwrm_queue_pri2cos_qcfg_input req = {0};
1015         struct bnxt *bp = netdev_priv(rdev->netdev);
1016         struct hwrm_queue_pri2cos_qcfg_output resp;
1017         struct bnxt_en_dev *en_dev = rdev->en_dev;
1018         struct bnxt_fw_msg fw_msg;
1019         u32 flags = 0;
1020         u8 *qcfgmap, *tmp_map;
1021         int rc = 0, i;
1022
1023         if (!cid_map)
1024                 return -EINVAL;
1025
1026         memset(&fw_msg, 0, sizeof(fw_msg));
1027         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
1028                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
1029         flags |= (dir & 0x01);
1030         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
1031         req.flags = cpu_to_le32(flags);
1032         req.port_id = bp->pf.port_id;
1033
1034         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1035                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1036         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
1037         if (rc)
1038                 return rc;
1039
1040         if (resp.queue_cfg_info) {
1041                 dev_warn(rdev_to_dev(rdev),
1042                          "Asymmetric cos queue configuration detected");
1043                 dev_warn(rdev_to_dev(rdev),
1044                          " on device, QoS may not be fully functional\n");
1045         }
1046         qcfgmap = &resp.pri0_cos_queue_id;
1047         tmp_map = (u8 *)cid_map;
1048         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
1049                 tmp_map[i] = qcfgmap[i];
1050
1051         return rc;
1052 }
1053
1054 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
1055                                         struct bnxt_re_qp *qp)
1056 {
1057         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
1058 }
1059
1060 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
1061 {
1062         int mask = IB_QP_STATE;
1063         struct ib_qp_attr qp_attr;
1064         struct bnxt_re_qp *qp;
1065
1066         qp_attr.qp_state = IB_QPS_ERR;
1067         mutex_lock(&rdev->qp_lock);
1068         list_for_each_entry(qp, &rdev->qp_list, list) {
1069                 /* Modify the state of all QPs except QP1/Shadow QP */
1070                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
1071                         if (qp->qplib_qp.state !=
1072                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
1073                             qp->qplib_qp.state !=
1074                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1075                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
1076                                                        1, IB_EVENT_QP_FATAL);
1077                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
1078                                                   NULL);
1079                         }
1080                 }
1081         }
1082         mutex_unlock(&rdev->qp_lock);
1083 }
1084
1085 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
1086 {
1087         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
1088         struct bnxt_qplib_gid gid;
1089         u16 gid_idx, index;
1090         int rc = 0;
1091
1092         if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1093                 return 0;
1094
1095         if (!sgid_tbl) {
1096                 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
1097                 return -EINVAL;
1098         }
1099
1100         for (index = 0; index < sgid_tbl->active; index++) {
1101                 gid_idx = sgid_tbl->hw_id[index];
1102
1103                 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
1104                             sizeof(bnxt_qplib_gid_zero)))
1105                         continue;
1106                 /* need to modify the VLAN enable setting of non VLAN GID only
1107                  * as setting is done for VLAN GID while adding GID
1108                  */
1109                 if (sgid_tbl->vlan[index])
1110                         continue;
1111
1112                 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
1113
1114                 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
1115                                             rdev->qplib_res.netdev->dev_addr);
1116         }
1117
1118         return rc;
1119 }
1120
1121 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
1122 {
1123         u32 prio_map = 0, tmp_map = 0;
1124         struct net_device *netdev;
1125         struct dcb_app app;
1126
1127         netdev = rdev->netdev;
1128
1129         memset(&app, 0, sizeof(app));
1130         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
1131         app.protocol = ETH_P_IBOE;
1132         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1133         prio_map = tmp_map;
1134
1135         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
1136         app.protocol = ROCE_V2_UDP_DPORT;
1137         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1138         prio_map |= tmp_map;
1139
1140         return prio_map;
1141 }
1142
1143 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
1144 {
1145         u16 prio;
1146         u8 id;
1147
1148         for (prio = 0, id = 0; prio < 8; prio++) {
1149                 if (prio_map & (1 << prio)) {
1150                         cosq[id] = cid_map[prio];
1151                         id++;
1152                         if (id == 2) /* Max 2 tcs supported */
1153                                 break;
1154                 }
1155         }
1156 }
1157
1158 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
1159 {
1160         u8 prio_map = 0;
1161         u64 cid_map;
1162         int rc;
1163
1164         /* Get priority for roce */
1165         prio_map = bnxt_re_get_priority_mask(rdev);
1166
1167         if (prio_map == rdev->cur_prio_map)
1168                 return 0;
1169         rdev->cur_prio_map = prio_map;
1170         /* Get cosq id for this priority */
1171         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
1172         if (rc) {
1173                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
1174                 return rc;
1175         }
1176         /* Parse CoS IDs for app priority */
1177         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
1178
1179         /* Config BONO. */
1180         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
1181         if (rc) {
1182                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
1183                          rdev->cosq[0], rdev->cosq[1]);
1184                 return rc;
1185         }
1186
1187         /* Actual priorities are not programmed as they are already
1188          * done by L2 driver; just enable or disable priority vlan tagging
1189          */
1190         if ((prio_map == 0 && rdev->qplib_res.prio) ||
1191             (prio_map != 0 && !rdev->qplib_res.prio)) {
1192                 rdev->qplib_res.prio = prio_map ? true : false;
1193
1194                 bnxt_re_update_gid(rdev);
1195         }
1196
1197         return 0;
1198 }
1199
1200 static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev)
1201 {
1202         struct bnxt_en_dev *en_dev = rdev->en_dev;
1203         struct hwrm_ver_get_output resp = {0};
1204         struct hwrm_ver_get_input req = {0};
1205         struct bnxt_fw_msg fw_msg;
1206         int rc = 0;
1207
1208         memset(&fw_msg, 0, sizeof(fw_msg));
1209         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
1210                               HWRM_VER_GET, -1, -1);
1211         req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
1212         req.hwrm_intf_min = HWRM_VERSION_MINOR;
1213         req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
1214         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1215                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1216         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
1217         if (rc) {
1218                 dev_err(rdev_to_dev(rdev),
1219                         "Failed to query HW version, rc = 0x%x", rc);
1220                 return;
1221         }
1222         rdev->qplib_ctx.hwrm_intf_ver =
1223                 (u64)resp.hwrm_intf_major << 48 |
1224                 (u64)resp.hwrm_intf_minor << 32 |
1225                 (u64)resp.hwrm_intf_build << 16 |
1226                 resp.hwrm_intf_patch;
1227 }
1228
1229 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev)
1230 {
1231         int rc;
1232
1233         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
1234                 /* Cleanup ib dev */
1235                 bnxt_re_unregister_ib(rdev);
1236         }
1237         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1238                 cancel_delayed_work_sync(&rdev->worker);
1239
1240         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED,
1241                                &rdev->flags))
1242                 bnxt_re_cleanup_res(rdev);
1243         if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags))
1244                 bnxt_re_free_res(rdev);
1245
1246         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1247                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1248                 if (rc)
1249                         dev_warn(rdev_to_dev(rdev),
1250                                  "Failed to deinitialize RCFW: %#x", rc);
1251                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1252                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1253                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1254                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1255                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1256         }
1257         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1258                 rc = bnxt_re_free_msix(rdev);
1259                 if (rc)
1260                         dev_warn(rdev_to_dev(rdev),
1261                                  "Failed to free MSI-X vectors: %#x", rc);
1262         }
1263         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1264                 rc = bnxt_re_unregister_netdev(rdev);
1265                 if (rc)
1266                         dev_warn(rdev_to_dev(rdev),
1267                                  "Failed to unregister with netdev: %#x", rc);
1268         }
1269 }
1270
1271 /* worker thread for polling periodic events. Now used for QoS programming*/
1272 static void bnxt_re_worker(struct work_struct *work)
1273 {
1274         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1275                                                 worker.work);
1276
1277         bnxt_re_setup_qos(rdev);
1278         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1279 }
1280
1281 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
1282 {
1283         int rc;
1284
1285         bool locked;
1286
1287         /* Acquire rtnl lock through out this function */
1288         rtnl_lock();
1289         locked = true;
1290
1291         /* Registered a new RoCE device instance to netdev */
1292         rc = bnxt_re_register_netdev(rdev);
1293         if (rc) {
1294                 rtnl_unlock();
1295                 pr_err("Failed to register with netedev: %#x\n", rc);
1296                 return -EINVAL;
1297         }
1298         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1299
1300         /* Check whether VF or PF */
1301         bnxt_re_get_sriov_func_type(rdev);
1302
1303         rc = bnxt_re_request_msix(rdev);
1304         if (rc) {
1305                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
1306                 rc = -EINVAL;
1307                 goto fail;
1308         }
1309         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1310
1311         bnxt_re_query_hwrm_intf_version(rdev);
1312
1313         /* Establish RCFW Communication Channel to initialize the context
1314          * memory for the function and all child VFs
1315          */
1316         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1317                                            &rdev->qplib_ctx,
1318                                            BNXT_RE_MAX_QPC_COUNT);
1319         if (rc) {
1320                 pr_err("Failed to allocate RCFW Channel: %#x\n", rc);
1321                 goto fail;
1322         }
1323         rc = bnxt_re_net_ring_alloc
1324                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1325                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1326                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1327                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1328                          &rdev->rcfw.creq_ring_id);
1329         if (rc) {
1330                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1331                 goto free_rcfw;
1332         }
1333         rc = bnxt_qplib_enable_rcfw_channel
1334                                 (rdev->en_dev->pdev, &rdev->rcfw,
1335                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1336                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1337                                  rdev->is_virtfn, &bnxt_re_aeq_handler);
1338         if (rc) {
1339                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1340                 goto free_ring;
1341         }
1342
1343         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
1344                                      rdev->is_virtfn);
1345         if (rc)
1346                 goto disable_rcfw;
1347         if (!rdev->is_virtfn)
1348                 bnxt_re_set_resource_limits(rdev);
1349
1350         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1351         if (rc) {
1352                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1353                 goto disable_rcfw;
1354         }
1355         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1356                                          rdev->qplib_ctx.stats.dma_map,
1357                                          &rdev->qplib_ctx.stats.fw_id);
1358         if (rc) {
1359                 pr_err("Failed to allocate stats context: %#x\n", rc);
1360                 goto free_ctx;
1361         }
1362
1363         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
1364                                   rdev->is_virtfn);
1365         if (rc) {
1366                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1367                 goto free_sctx;
1368         }
1369         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1370
1371         /* Resources based on the 'new' device caps */
1372         rc = bnxt_re_alloc_res(rdev);
1373         if (rc) {
1374                 pr_err("Failed to allocate resources: %#x\n", rc);
1375                 goto fail;
1376         }
1377         set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags);
1378         rc = bnxt_re_init_res(rdev);
1379         if (rc) {
1380                 pr_err("Failed to initialize resources: %#x\n", rc);
1381                 goto fail;
1382         }
1383
1384         set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags);
1385
1386         if (!rdev->is_virtfn) {
1387                 rc = bnxt_re_setup_qos(rdev);
1388                 if (rc)
1389                         pr_info("RoCE priority not yet configured\n");
1390
1391                 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1392                 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1393                 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1394         }
1395
1396         rtnl_unlock();
1397         locked = false;
1398
1399         /* Register ib dev */
1400         rc = bnxt_re_register_ib(rdev);
1401         if (rc) {
1402                 pr_err("Failed to register with IB: %#x\n", rc);
1403                 goto fail;
1404         }
1405         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1406         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1407         ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1408                          &rdev->active_width);
1409         set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
1410         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1411         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1412
1413         return 0;
1414 free_sctx:
1415         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1416 free_ctx:
1417         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1418 disable_rcfw:
1419         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1420 free_ring:
1421         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1422 free_rcfw:
1423         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1424 fail:
1425         if (!locked)
1426                 rtnl_lock();
1427         bnxt_re_ib_unreg(rdev);
1428         rtnl_unlock();
1429
1430         return rc;
1431 }
1432
1433 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1434 {
1435         struct bnxt_en_dev *en_dev = rdev->en_dev;
1436         struct net_device *netdev = rdev->netdev;
1437
1438         bnxt_re_dev_remove(rdev);
1439
1440         if (netdev)
1441                 bnxt_re_dev_unprobe(netdev, en_dev);
1442 }
1443
1444 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1445 {
1446         struct bnxt_en_dev *en_dev;
1447         int rc = 0;
1448
1449         if (!is_bnxt_re_dev(netdev))
1450                 return -ENODEV;
1451
1452         en_dev = bnxt_re_dev_probe(netdev);
1453         if (IS_ERR(en_dev)) {
1454                 if (en_dev != ERR_PTR(-ENODEV))
1455                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1456                 rc = PTR_ERR(en_dev);
1457                 goto exit;
1458         }
1459         *rdev = bnxt_re_dev_add(netdev, en_dev);
1460         if (!*rdev) {
1461                 rc = -ENOMEM;
1462                 bnxt_re_dev_unprobe(netdev, en_dev);
1463                 goto exit;
1464         }
1465 exit:
1466         return rc;
1467 }
1468
1469 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1470 {
1471         pci_dev_put(rdev->en_dev->pdev);
1472 }
1473
1474 /* Handle all deferred netevents tasks */
1475 static void bnxt_re_task(struct work_struct *work)
1476 {
1477         struct bnxt_re_work *re_work;
1478         struct bnxt_re_dev *rdev;
1479         int rc = 0;
1480
1481         re_work = container_of(work, struct bnxt_re_work, work);
1482         rdev = re_work->rdev;
1483
1484         if (re_work->event != NETDEV_REGISTER &&
1485             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1486                 return;
1487
1488         switch (re_work->event) {
1489         case NETDEV_REGISTER:
1490                 rc = bnxt_re_ib_reg(rdev);
1491                 if (rc) {
1492                         dev_err(rdev_to_dev(rdev),
1493                                 "Failed to register with IB: %#x", rc);
1494                         bnxt_re_remove_one(rdev);
1495                         bnxt_re_dev_unreg(rdev);
1496                         goto exit;
1497                 }
1498                 break;
1499         case NETDEV_UP:
1500                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1501                                        IB_EVENT_PORT_ACTIVE);
1502                 break;
1503         case NETDEV_DOWN:
1504                 bnxt_re_dev_stop(rdev);
1505                 break;
1506         case NETDEV_CHANGE:
1507                 if (!netif_carrier_ok(rdev->netdev))
1508                         bnxt_re_dev_stop(rdev);
1509                 else if (netif_carrier_ok(rdev->netdev))
1510                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1511                                                IB_EVENT_PORT_ACTIVE);
1512                 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1513                                  &rdev->active_width);
1514                 break;
1515         default:
1516                 break;
1517         }
1518         smp_mb__before_atomic();
1519         atomic_dec(&rdev->sched_count);
1520 exit:
1521         kfree(re_work);
1522 }
1523
1524 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1525 {
1526         pci_dev_get(rdev->en_dev->pdev);
1527 }
1528
1529 /*
1530  * "Notifier chain callback can be invoked for the same chain from
1531  * different CPUs at the same time".
1532  *
1533  * For cases when the netdev is already present, our call to the
1534  * register_netdevice_notifier() will actually get the rtnl_lock()
1535  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1536  * events.
1537  *
1538  * But for cases when the netdev is not already present, the notifier
1539  * chain is subjected to be invoked from different CPUs simultaneously.
1540  *
1541  * This is protected by the netdev_mutex.
1542  */
1543 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1544                                 unsigned long event, void *ptr)
1545 {
1546         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1547         struct bnxt_re_work *re_work;
1548         struct bnxt_re_dev *rdev;
1549         int rc = 0;
1550         bool sch_work = false;
1551
1552         real_dev = rdma_vlan_dev_real_dev(netdev);
1553         if (!real_dev)
1554                 real_dev = netdev;
1555
1556         rdev = bnxt_re_from_netdev(real_dev);
1557         if (!rdev && event != NETDEV_REGISTER)
1558                 goto exit;
1559         if (real_dev != netdev)
1560                 goto exit;
1561
1562         switch (event) {
1563         case NETDEV_REGISTER:
1564                 if (rdev)
1565                         break;
1566                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1567                 if (rc == -ENODEV)
1568                         break;
1569                 if (rc) {
1570                         pr_err("Failed to register with the device %s: %#x\n",
1571                                real_dev->name, rc);
1572                         break;
1573                 }
1574                 bnxt_re_init_one(rdev);
1575                 sch_work = true;
1576                 break;
1577
1578         case NETDEV_UNREGISTER:
1579                 /* netdev notifier will call NETDEV_UNREGISTER again later since
1580                  * we are still holding the reference to the netdev
1581                  */
1582                 if (atomic_read(&rdev->sched_count) > 0)
1583                         goto exit;
1584                 bnxt_re_ib_unreg(rdev);
1585                 bnxt_re_remove_one(rdev);
1586                 bnxt_re_dev_unreg(rdev);
1587                 break;
1588
1589         default:
1590                 sch_work = true;
1591                 break;
1592         }
1593         if (sch_work) {
1594                 /* Allocate for the deferred task */
1595                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1596                 if (re_work) {
1597                         re_work->rdev = rdev;
1598                         re_work->event = event;
1599                         re_work->vlan_dev = (real_dev == netdev ?
1600                                              NULL : netdev);
1601                         INIT_WORK(&re_work->work, bnxt_re_task);
1602                         atomic_inc(&rdev->sched_count);
1603                         queue_work(bnxt_re_wq, &re_work->work);
1604                 }
1605         }
1606
1607 exit:
1608         return NOTIFY_DONE;
1609 }
1610
1611 static struct notifier_block bnxt_re_netdev_notifier = {
1612         .notifier_call = bnxt_re_netdev_event
1613 };
1614
1615 static int __init bnxt_re_mod_init(void)
1616 {
1617         int rc = 0;
1618
1619         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1620
1621         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1622         if (!bnxt_re_wq)
1623                 return -ENOMEM;
1624
1625         INIT_LIST_HEAD(&bnxt_re_dev_list);
1626
1627         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1628         if (rc) {
1629                 pr_err("%s: Cannot register to netdevice_notifier",
1630                        ROCE_DRV_MODULE_NAME);
1631                 goto err_netdev;
1632         }
1633         return 0;
1634
1635 err_netdev:
1636         destroy_workqueue(bnxt_re_wq);
1637
1638         return rc;
1639 }
1640
1641 static void __exit bnxt_re_mod_exit(void)
1642 {
1643         struct bnxt_re_dev *rdev, *next;
1644         LIST_HEAD(to_be_deleted);
1645
1646         mutex_lock(&bnxt_re_dev_lock);
1647         /* Free all adapter allocated resources */
1648         if (!list_empty(&bnxt_re_dev_list))
1649                 list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
1650         mutex_unlock(&bnxt_re_dev_lock);
1651        /*
1652         * Cleanup the devices in reverse order so that the VF device
1653         * cleanup is done before PF cleanup
1654         */
1655         list_for_each_entry_safe_reverse(rdev, next, &to_be_deleted, list) {
1656                 dev_info(rdev_to_dev(rdev), "Unregistering Device");
1657                 /*
1658                  * Flush out any scheduled tasks before destroying the
1659                  * resources
1660                  */
1661                 flush_workqueue(bnxt_re_wq);
1662                 bnxt_re_dev_stop(rdev);
1663                 /* Acquire the rtnl_lock as the L2 resources are freed here */
1664                 rtnl_lock();
1665                 bnxt_re_ib_unreg(rdev);
1666                 rtnl_unlock();
1667                 bnxt_re_remove_one(rdev);
1668                 bnxt_re_dev_unreg(rdev);
1669         }
1670         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1671         if (bnxt_re_wq)
1672                 destroy_workqueue(bnxt_re_wq);
1673 }
1674
1675 module_init(bnxt_re_mod_init);
1676 module_exit(bnxt_re_mod_exit);