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 static char version[] =
  68                 BNXT_RE_DESC " v" ROCE_DRV_MODULE_VERSION "\n";
  69
  70 MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>");
  71 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
  72 MODULE_LICENSE("Dual BSD/GPL");
  73 MODULE_VERSION(ROCE_DRV_MODULE_VERSION);
  74
  75 /* globals */
  76 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
  77 /* Mutex to protect the list of bnxt_re devices added */
  78 static DEFINE_MUTEX(bnxt_re_dev_lock);
  79 static struct workqueue_struct *bnxt_re_wq;
  80
  81 /* for handling bnxt_en callbacks later */
  82 static void bnxt_re_stop(void *p)
  83 {
  84 }
  85
  86 static void bnxt_re_start(void *p)
  87 {
  88 }
  89
  90 static void bnxt_re_sriov_config(void *p, int num_vfs)
  91 {
  92 }
  93
  94 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
  95         .ulp_async_notifier = NULL,
  96         .ulp_stop = bnxt_re_stop,
  97         .ulp_start = bnxt_re_start,
  98         .ulp_sriov_config = bnxt_re_sriov_config
  99 };
 100
 101 /* RoCE -> Net driver */
 102
 103 /* Driver registration routines used to let the networking driver (bnxt_en)
 104  * to know that the RoCE driver is now installed
 105  */
 106 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev, bool lock_wait)
 107 {
 108         struct bnxt_en_dev *en_dev;
 109         int rc;
 110
 111         if (!rdev)
 112                 return -EINVAL;
 113
 114         en_dev = rdev->en_dev;
 115         /* Acquire rtnl lock if it is not invokded from netdev event */
 116         if (lock_wait)
 117                 rtnl_lock();
 118
 119         rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
 120                                                     BNXT_ROCE_ULP);
 121         if (lock_wait)
 122                 rtnl_unlock();
 123         return rc;
 124 }
 125
 126 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
 127 {
 128         struct bnxt_en_dev *en_dev;
 129         int rc = 0;
 130
 131         if (!rdev)
 132                 return -EINVAL;
 133
 134         en_dev = rdev->en_dev;
 135
 136         rtnl_lock();
 137         rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
 138                                                   &bnxt_re_ulp_ops, rdev);
 139         rtnl_unlock();
 140         return rc;
 141 }
 142
 143 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev, bool lock_wait)
 144 {
 145         struct bnxt_en_dev *en_dev;
 146         int rc;
 147
 148         if (!rdev)
 149                 return -EINVAL;
 150
 151         en_dev = rdev->en_dev;
 152
 153         if (lock_wait)
 154                 rtnl_lock();
 155
 156         rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
 157
 158         if (lock_wait)
 159                 rtnl_unlock();
 160         return rc;
 161 }
 162
 163 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
 164 {
 165         int rc = 0, num_msix_want = BNXT_RE_MIN_MSIX, num_msix_got;
 166         struct bnxt_en_dev *en_dev;
 167
 168         if (!rdev)
 169                 return -EINVAL;
 170
 171         en_dev = rdev->en_dev;
 172
 173         rtnl_lock();
 174         num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
 175                                                          rdev->msix_entries,
 176                                                          num_msix_want);
 177         if (num_msix_got < BNXT_RE_MIN_MSIX) {
 178                 rc = -EINVAL;
 179                 goto done;
 180         }
 181         if (num_msix_got != num_msix_want) {
 182                 dev_warn(rdev_to_dev(rdev),
 183                          "Requested %d MSI-X vectors, got %d\n",
 184                          num_msix_want, num_msix_got);
 185         }
 186         rdev->num_msix = num_msix_got;
 187 done:
 188         rtnl_unlock();
 189         return rc;
 190 }
 191
 192 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
 193                                   u16 opcd, u16 crid, u16 trid)
 194 {
 195         hdr->req_type = cpu_to_le16(opcd);
 196         hdr->cmpl_ring = cpu_to_le16(crid);
 197         hdr->target_id = cpu_to_le16(trid);
 198 }
 199
 200 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 201                                 int msg_len, void *resp, int resp_max_len,
 202                                 int timeout)
 203 {
 204         fw_msg->msg = msg;
 205         fw_msg->msg_len = msg_len;
 206         fw_msg->resp = resp;
 207         fw_msg->resp_max_len = resp_max_len;
 208         fw_msg->timeout = timeout;
 209 }
 210
 211 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id,
 212                                  bool lock_wait)
 213 {
 214         struct bnxt_en_dev *en_dev = rdev->en_dev;
 215         struct hwrm_ring_free_input req = {0};
 216         struct hwrm_ring_free_output resp;
 217         struct bnxt_fw_msg fw_msg;
 218         bool do_unlock = false;
 219         int rc = -EINVAL;
 220
 221         if (!en_dev)
 222                 return rc;
 223
 224         memset(&fw_msg, 0, sizeof(fw_msg));
 225         if (lock_wait) {
 226                 rtnl_lock();
 227                 do_unlock = true;
 228         }
 229
 230         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
 231         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 232         req.ring_id = cpu_to_le16(fw_ring_id);
 233         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 234                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 235         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 236         if (rc)
 237                 dev_err(rdev_to_dev(rdev),
 238                         "Failed to free HW ring:%d :%#x", req.ring_id, rc);
 239         if (do_unlock)
 240                 rtnl_unlock();
 241         return rc;
 242 }
 243
 244 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
 245                                   int pages, int type, u32 ring_mask,
 246                                   u32 map_index, u16 *fw_ring_id)
 247 {
 248         struct bnxt_en_dev *en_dev = rdev->en_dev;
 249         struct hwrm_ring_alloc_input req = {0};
 250         struct hwrm_ring_alloc_output resp;
 251         struct bnxt_fw_msg fw_msg;
 252         int rc = -EINVAL;
 253
 254         if (!en_dev)
 255                 return rc;
 256
 257         memset(&fw_msg, 0, sizeof(fw_msg));
 258         rtnl_lock();
 259         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
 260         req.enables = 0;
 261         req.page_tbl_addr =  cpu_to_le64(dma_arr[0]);
 262         if (pages > 1) {
 263                 /* Page size is in log2 units */
 264                 req.page_size = BNXT_PAGE_SHIFT;
 265                 req.page_tbl_depth = 1;
 266         }
 267         req.fbo = 0;
 268         /* Association of ring index with doorbell index and MSIX number */
 269         req.logical_id = cpu_to_le16(map_index);
 270         req.length = cpu_to_le32(ring_mask + 1);
 271         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 272         req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
 273         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 274                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 275         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 276         if (!rc)
 277                 *fw_ring_id = le16_to_cpu(resp.ring_id);
 278
 279         rtnl_unlock();
 280         return rc;
 281 }
 282
 283 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
 284                                       u32 fw_stats_ctx_id, bool lock_wait)
 285 {
 286         struct bnxt_en_dev *en_dev = rdev->en_dev;
 287         struct hwrm_stat_ctx_free_input req = {0};
 288         struct bnxt_fw_msg fw_msg;
 289         bool do_unlock = false;
 290         int rc = -EINVAL;
 291
 292         if (!en_dev)
 293                 return rc;
 294
 295         memset(&fw_msg, 0, sizeof(fw_msg));
 296         if (lock_wait) {
 297                 rtnl_lock();
 298                 do_unlock = true;
 299         }
 300
 301         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
 302         req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
 303         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
 304                             sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
 305         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 306         if (rc)
 307                 dev_err(rdev_to_dev(rdev),
 308                         "Failed to free HW stats context %#x", rc);
 309
 310         if (do_unlock)
 311                 rtnl_unlock();
 312         return rc;
 313 }
 314
 315 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
 316                                        dma_addr_t dma_map,
 317                                        u32 *fw_stats_ctx_id)
 318 {
 319         struct hwrm_stat_ctx_alloc_output resp = {0};
 320         struct hwrm_stat_ctx_alloc_input req = {0};
 321         struct bnxt_en_dev *en_dev = rdev->en_dev;
 322         struct bnxt_fw_msg fw_msg;
 323         int rc = -EINVAL;
 324
 325         *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
 326
 327         if (!en_dev)
 328                 return rc;
 329
 330         memset(&fw_msg, 0, sizeof(fw_msg));
 331         rtnl_lock();
 332
 333         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
 334         req.update_period_ms = cpu_to_le32(1000);
 335         req.stats_dma_addr = cpu_to_le64(dma_map);
 336         req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
 337         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 338                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 339         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 340         if (!rc)
 341                 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 342
 343         rtnl_unlock();
 344         return rc;
 345 }
 346
 347 /* Device */
 348
 349 static bool is_bnxt_re_dev(struct net_device *netdev)
 350 {
 351         struct ethtool_drvinfo drvinfo;
 352
 353         if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
 354                 memset(&drvinfo, 0, sizeof(drvinfo));
 355                 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
 356
 357                 if (strcmp(drvinfo.driver, "bnxt_en"))
 358                         return false;
 359                 return true;
 360         }
 361         return false;
 362 }
 363
 364 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 365 {
 366         struct bnxt_re_dev *rdev;
 367
 368         rcu_read_lock();
 369         list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
 370                 if (rdev->netdev == netdev) {
 371                         rcu_read_unlock();
 372                         return rdev;
 373                 }
 374         }
 375         rcu_read_unlock();
 376         return NULL;
 377 }
 378
 379 static void bnxt_re_dev_unprobe(struct net_device *netdev,
 380                                 struct bnxt_en_dev *en_dev)
 381 {
 382         dev_put(netdev);
 383         module_put(en_dev->pdev->driver->driver.owner);
 384 }
 385
 386 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 387 {
 388         struct bnxt *bp = netdev_priv(netdev);
 389         struct bnxt_en_dev *en_dev;
 390         struct pci_dev *pdev;
 391
 392         /* Call bnxt_en's RoCE probe via indirect API */
 393         if (!bp->ulp_probe)
 394                 return ERR_PTR(-EINVAL);
 395
 396         en_dev = bp->ulp_probe(netdev);
 397         if (IS_ERR(en_dev))
 398                 return en_dev;
 399
 400         pdev = en_dev->pdev;
 401         if (!pdev)
 402                 return ERR_PTR(-EINVAL);
 403
 404         if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
 405                 dev_dbg(&pdev->dev,
 406                         "%s: probe error: RoCE is not supported on this device",
 407                         ROCE_DRV_MODULE_NAME);
 408                 return ERR_PTR(-ENODEV);
 409         }
 410
 411         /* Bump net device reference count */
 412         if (!try_module_get(pdev->driver->driver.owner))
 413                 return ERR_PTR(-ENODEV);
 414
 415         dev_hold(netdev);
 416
 417         return en_dev;
 418 }
 419
 420 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
 421 {
 422         ib_unregister_device(&rdev->ibdev);
 423 }
 424
 425 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 426 {
 427         struct ib_device *ibdev = &rdev->ibdev;
 428
 429         /* ib device init */
 430         ibdev->owner = THIS_MODULE;
 431         ibdev->node_type = RDMA_NODE_IB_CA;
 432         strlcpy(ibdev->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
 433         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 434                 strlen(BNXT_RE_DESC) + 5);
 435         ibdev->phys_port_cnt = 1;
 436
 437         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 438
 439         ibdev->num_comp_vectors = 1;
 440         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 441         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 442
 443         /* User space */
 444         ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
 445         ibdev->uverbs_cmd_mask =
 446                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 447                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 448                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 449                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 450                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 451                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 452                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 453                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 454                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 455                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 456                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 457                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 458                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 459                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 460                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 461                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 462                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 463                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 464                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 465                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 466                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 467                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 468                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 469                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 470         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 471
 472         /* Kernel verbs */
 473         ibdev->query_device             = bnxt_re_query_device;
 474         ibdev->modify_device            = bnxt_re_modify_device;
 475
 476         ibdev->query_port               = bnxt_re_query_port;
 477         ibdev->modify_port              = bnxt_re_modify_port;
 478         ibdev->get_port_immutable       = bnxt_re_get_port_immutable;
 479         ibdev->query_pkey               = bnxt_re_query_pkey;
 480         ibdev->query_gid                = bnxt_re_query_gid;
 481         ibdev->get_netdev               = bnxt_re_get_netdev;
 482         ibdev->add_gid                  = bnxt_re_add_gid;
 483         ibdev->del_gid                  = bnxt_re_del_gid;
 484         ibdev->get_link_layer           = bnxt_re_get_link_layer;
 485
 486         ibdev->alloc_pd                 = bnxt_re_alloc_pd;
 487         ibdev->dealloc_pd               = bnxt_re_dealloc_pd;
 488
 489         ibdev->create_ah                = bnxt_re_create_ah;
 490         ibdev->modify_ah                = bnxt_re_modify_ah;
 491         ibdev->query_ah                 = bnxt_re_query_ah;
 492         ibdev->destroy_ah               = bnxt_re_destroy_ah;
 493
 494         ibdev->create_qp                = bnxt_re_create_qp;
 495         ibdev->modify_qp                = bnxt_re_modify_qp;
 496         ibdev->query_qp                 = bnxt_re_query_qp;
 497         ibdev->destroy_qp               = bnxt_re_destroy_qp;
 498
 499         ibdev->post_send                = bnxt_re_post_send;
 500         ibdev->post_recv                = bnxt_re_post_recv;
 501
 502         ibdev->create_cq                = bnxt_re_create_cq;
 503         ibdev->destroy_cq               = bnxt_re_destroy_cq;
 504         ibdev->poll_cq                  = bnxt_re_poll_cq;
 505         ibdev->req_notify_cq            = bnxt_re_req_notify_cq;
 506
 507         ibdev->get_dma_mr               = bnxt_re_get_dma_mr;
 508         ibdev->dereg_mr                 = bnxt_re_dereg_mr;
 509         ibdev->alloc_mr                 = bnxt_re_alloc_mr;
 510         ibdev->map_mr_sg                = bnxt_re_map_mr_sg;
 511
 512         ibdev->reg_user_mr              = bnxt_re_reg_user_mr;
 513         ibdev->alloc_ucontext           = bnxt_re_alloc_ucontext;
 514         ibdev->dealloc_ucontext         = bnxt_re_dealloc_ucontext;
 515         ibdev->mmap                     = bnxt_re_mmap;
 516
 517         return ib_register_device(ibdev, NULL);
 518 }
 519
 520 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 521                         char *buf)
 522 {
 523         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 524
 525         return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 526 }
 527
 528 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
 529                            char *buf)
 530 {
 531         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 532
 533         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
 534 }
 535
 536 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 537                         char *buf)
 538 {
 539         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 540
 541         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
 542 }
 543
 544 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
 545 static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
 546 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
 547
 548 static struct device_attribute *bnxt_re_attributes[] = {
 549         &dev_attr_hw_rev,
 550         &dev_attr_fw_rev,
 551         &dev_attr_hca_type
 552 };
 553
 554 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 555 {
 556         dev_put(rdev->netdev);
 557         rdev->netdev = NULL;
 558
 559         mutex_lock(&bnxt_re_dev_lock);
 560         list_del_rcu(&rdev->list);
 561         mutex_unlock(&bnxt_re_dev_lock);
 562
 563         synchronize_rcu();
 564         flush_workqueue(bnxt_re_wq);
 565
 566         ib_dealloc_device(&rdev->ibdev);
 567         /* rdev is gone */
 568 }
 569
 570 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 571                                            struct bnxt_en_dev *en_dev)
 572 {
 573         struct bnxt_re_dev *rdev;
 574
 575         /* Allocate bnxt_re_dev instance here */
 576         rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
 577         if (!rdev) {
 578                 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 579                         ROCE_DRV_MODULE_NAME);
 580                 return NULL;
 581         }
 582         /* Default values */
 583         rdev->netdev = netdev;
 584         dev_hold(rdev->netdev);
 585         rdev->en_dev = en_dev;
 586         rdev->id = rdev->en_dev->pdev->devfn;
 587         INIT_LIST_HEAD(&rdev->qp_list);
 588         mutex_init(&rdev->qp_lock);
 589         atomic_set(&rdev->qp_count, 0);
 590         atomic_set(&rdev->cq_count, 0);
 591         atomic_set(&rdev->srq_count, 0);
 592         atomic_set(&rdev->mr_count, 0);
 593         atomic_set(&rdev->mw_count, 0);
 594         rdev->cosq[0] = 0xFFFF;
 595         rdev->cosq[1] = 0xFFFF;
 596
 597         mutex_lock(&bnxt_re_dev_lock);
 598         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 599         mutex_unlock(&bnxt_re_dev_lock);
 600         return rdev;
 601 }
 602
 603 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 604                                struct creq_func_event *aeqe)
 605 {
 606         switch (aeqe->event) {
 607         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 608                 break;
 609         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 610                 break;
 611         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 612                 break;
 613         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 614                 break;
 615         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 616                 break;
 617         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 618                 break;
 619         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 620                 break;
 621         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 622                 break;
 623         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 624                 break;
 625         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 626                 break;
 627         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 628                 break;
 629         default:
 630                 return -EINVAL;
 631         }
 632         return 0;
 633 }
 634
 635 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 636                                struct bnxt_qplib_cq *handle)
 637 {
 638         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 639                                              qplib_cq);
 640
 641         if (!cq) {
 642                 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
 643                         ROCE_DRV_MODULE_NAME);
 644                 return -EINVAL;
 645         }
 646         if (cq->ib_cq.comp_handler) {
 647                 /* Lock comp_handler? */
 648                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 649         }
 650
 651         return 0;
 652 }
 653
 654 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 655 {
 656         if (rdev->nq.hwq.max_elements)
 657                 bnxt_qplib_disable_nq(&rdev->nq);
 658
 659         if (rdev->qplib_res.rcfw)
 660                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 661 }
 662
 663 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 664 {
 665         int rc = 0;
 666
 667         bnxt_qplib_init_res(&rdev->qplib_res);
 668
 669         if (rdev->msix_entries[BNXT_RE_NQ_IDX].vector <= 0)
 670                 return -EINVAL;
 671
 672         rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq,
 673                                   rdev->msix_entries[BNXT_RE_NQ_IDX].vector,
 674                                   rdev->msix_entries[BNXT_RE_NQ_IDX].db_offset,
 675                                   &bnxt_re_cqn_handler,
 676                                   NULL);
 677
 678         if (rc)
 679                 dev_err(rdev_to_dev(rdev), "Failed to enable NQ: %#x", rc);
 680
 681         return rc;
 682 }
 683
 684 static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
 685 {
 686         if (rdev->nq.hwq.max_elements) {
 687                 bnxt_re_net_ring_free(rdev, rdev->nq.ring_id, lock_wait);
 688                 bnxt_qplib_free_nq(&rdev->nq);
 689         }
 690         if (rdev->qplib_res.dpi_tbl.max) {
 691                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 692                                        &rdev->qplib_res.dpi_tbl,
 693                                        &rdev->dpi_privileged);
 694         }
 695         if (rdev->qplib_res.rcfw) {
 696                 bnxt_qplib_free_res(&rdev->qplib_res);
 697                 rdev->qplib_res.rcfw = NULL;
 698         }
 699 }
 700
 701 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 702 {
 703         int rc = 0;
 704
 705         /* Configure and allocate resources for qplib */
 706         rdev->qplib_res.rcfw = &rdev->rcfw;
 707         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
 708         if (rc)
 709                 goto fail;
 710
 711         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
 712                                   rdev->netdev, &rdev->dev_attr);
 713         if (rc)
 714                 goto fail;
 715
 716         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 717                                   &rdev->dpi_privileged,
 718                                   rdev);
 719         if (rc)
 720                 goto fail;
 721
 722         rdev->nq.hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
 723                                     BNXT_RE_MAX_SRQC_COUNT + 2;
 724         rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq);
 725         if (rc) {
 726                 dev_err(rdev_to_dev(rdev),
 727                         "Failed to allocate NQ memory: %#x", rc);
 728                 goto fail;
 729         }
 730         rc = bnxt_re_net_ring_alloc
 731                         (rdev, rdev->nq.hwq.pbl[PBL_LVL_0].pg_map_arr,
 732                          rdev->nq.hwq.pbl[rdev->nq.hwq.level].pg_count,
 733                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_NQE_MAX_CNT - 1,
 734                          rdev->msix_entries[BNXT_RE_NQ_IDX].ring_idx,
 735                          &rdev->nq.ring_id);
 736         if (rc) {
 737                 dev_err(rdev_to_dev(rdev),
 738                         "Failed to allocate NQ ring: %#x", rc);
 739                 goto free_nq;
 740         }
 741         return 0;
 742 free_nq:
 743         bnxt_qplib_free_nq(&rdev->nq);
 744 fail:
 745         rdev->qplib_res.rcfw = NULL;
 746         return rc;
 747 }
 748
 749 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
 750                                    u8 port_num, enum ib_event_type event)
 751 {
 752         struct ib_event ib_event;
 753
 754         ib_event.device = ibdev;
 755         if (qp)
 756                 ib_event.element.qp = qp;
 757         else
 758                 ib_event.element.port_num = port_num;
 759         ib_event.event = event;
 760         ib_dispatch_event(&ib_event);
 761 }
 762
 763 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
 764 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
 765                                       u64 *cid_map)
 766 {
 767         struct hwrm_queue_pri2cos_qcfg_input req = {0};
 768         struct bnxt *bp = netdev_priv(rdev->netdev);
 769         struct hwrm_queue_pri2cos_qcfg_output resp;
 770         struct bnxt_en_dev *en_dev = rdev->en_dev;
 771         struct bnxt_fw_msg fw_msg;
 772         u32 flags = 0;
 773         u8 *qcfgmap, *tmp_map;
 774         int rc = 0, i;
 775
 776         if (!cid_map)
 777                 return -EINVAL;
 778
 779         memset(&fw_msg, 0, sizeof(fw_msg));
 780         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
 781                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
 782         flags |= (dir & 0x01);
 783         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
 784         req.flags = cpu_to_le32(flags);
 785         req.port_id = bp->pf.port_id;
 786
 787         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 788                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 789         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 790         if (rc)
 791                 return rc;
 792
 793         if (resp.queue_cfg_info) {
 794                 dev_warn(rdev_to_dev(rdev),
 795                          "Asymmetric cos queue configuration detected");
 796                 dev_warn(rdev_to_dev(rdev),
 797                          " on device, QoS may not be fully functional\n");
 798         }
 799         qcfgmap = &resp.pri0_cos_queue_id;
 800         tmp_map = (u8 *)cid_map;
 801         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 802                 tmp_map[i] = qcfgmap[i];
 803
 804         return rc;
 805 }
 806
 807 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
 808                                         struct bnxt_re_qp *qp)
 809 {
 810         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
 811 }
 812
 813 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
 814 {
 815         int mask = IB_QP_STATE;
 816         struct ib_qp_attr qp_attr;
 817         struct bnxt_re_qp *qp;
 818
 819         qp_attr.qp_state = IB_QPS_ERR;
 820         mutex_lock(&rdev->qp_lock);
 821         list_for_each_entry(qp, &rdev->qp_list, list) {
 822                 /* Modify the state of all QPs except QP1/Shadow QP */
 823                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
 824                         if (qp->qplib_qp.state !=
 825                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
 826                             qp->qplib_qp.state !=
 827                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 828                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
 829                                                        1, IB_EVENT_QP_FATAL);
 830                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
 831                                                   NULL);
 832                         }
 833                 }
 834         }
 835         mutex_unlock(&rdev->qp_lock);
 836 }
 837
 838 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
 839 {
 840         u32 prio_map = 0, tmp_map = 0;
 841         struct net_device *netdev;
 842         struct dcb_app app;
 843
 844         netdev = rdev->netdev;
 845
 846         memset(&app, 0, sizeof(app));
 847         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
 848         app.protocol = ETH_P_IBOE;
 849         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 850         prio_map = tmp_map;
 851
 852         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
 853         app.protocol = ROCE_V2_UDP_DPORT;
 854         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 855         prio_map |= tmp_map;
 856
 857         if (!prio_map)
 858                 prio_map = -EFAULT;
 859         return prio_map;
 860 }
 861
 862 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
 863 {
 864         u16 prio;
 865         u8 id;
 866
 867         for (prio = 0, id = 0; prio < 8; prio++) {
 868                 if (prio_map & (1 << prio)) {
 869                         cosq[id] = cid_map[prio];
 870                         id++;
 871                         if (id == 2) /* Max 2 tcs supported */
 872                                 break;
 873                 }
 874         }
 875 }
 876
 877 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
 878 {
 879         u8 prio_map = 0;
 880         u64 cid_map;
 881         int rc;
 882
 883         /* Get priority for roce */
 884         rc = bnxt_re_get_priority_mask(rdev);
 885         if (rc < 0)
 886                 return rc;
 887         prio_map = (u8)rc;
 888
 889         if (prio_map == rdev->cur_prio_map)
 890                 return 0;
 891         rdev->cur_prio_map = prio_map;
 892         /* Get cosq id for this priority */
 893         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
 894         if (rc) {
 895                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
 896                 return rc;
 897         }
 898         /* Parse CoS IDs for app priority */
 899         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
 900
 901         /* Config BONO. */
 902         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
 903         if (rc) {
 904                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
 905                          rdev->cosq[0], rdev->cosq[1]);
 906                 return rc;
 907         }
 908
 909         return 0;
 910 }
 911
 912 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
 913 {
 914         int i, rc;
 915
 916         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
 917                 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
 918                         device_remove_file(&rdev->ibdev.dev,
 919                                            bnxt_re_attributes[i]);
 920                 /* Cleanup ib dev */
 921                 bnxt_re_unregister_ib(rdev);
 922         }
 923         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
 924                 cancel_delayed_work(&rdev->worker);
 925
 926         bnxt_re_cleanup_res(rdev);
 927         bnxt_re_free_res(rdev, lock_wait);
 928
 929         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
 930                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
 931                 if (rc)
 932                         dev_warn(rdev_to_dev(rdev),
 933                                  "Failed to deinitialize RCFW: %#x", rc);
 934                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
 935                                            lock_wait);
 936                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
 937                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
 938                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
 939                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
 940         }
 941         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
 942                 rc = bnxt_re_free_msix(rdev, lock_wait);
 943                 if (rc)
 944                         dev_warn(rdev_to_dev(rdev),
 945                                  "Failed to free MSI-X vectors: %#x", rc);
 946         }
 947         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
 948                 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
 949                 if (rc)
 950                         dev_warn(rdev_to_dev(rdev),
 951                                  "Failed to unregister with netdev: %#x", rc);
 952         }
 953 }
 954
 955 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 956 {
 957         u32 i;
 958
 959         rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
 960         rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
 961         rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
 962         rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
 963         for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
 964                 rdev->qplib_ctx.tqm_count[i] =
 965                 rdev->dev_attr.tqm_alloc_reqs[i];
 966 }
 967
 968 /* worker thread for polling periodic events. Now used for QoS programming*/
 969 static void bnxt_re_worker(struct work_struct *work)
 970 {
 971         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
 972                                                 worker.work);
 973
 974         bnxt_re_setup_qos(rdev);
 975         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
 976 }
 977
 978 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
 979 {
 980         int i, j, rc;
 981
 982         /* Registered a new RoCE device instance to netdev */
 983         rc = bnxt_re_register_netdev(rdev);
 984         if (rc) {
 985                 pr_err("Failed to register with netedev: %#x\n", rc);
 986                 return -EINVAL;
 987         }
 988         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
 989
 990         rc = bnxt_re_request_msix(rdev);
 991         if (rc) {
 992                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
 993                 rc = -EINVAL;
 994                 goto fail;
 995         }
 996         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
 997
 998         /* Establish RCFW Communication Channel to initialize the context
 999          * memory for the function and all child VFs
1000          */
1001         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw);
1002         if (rc)
1003                 goto fail;
1004
1005         rc = bnxt_re_net_ring_alloc
1006                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1007                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1008                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1009                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1010                          &rdev->rcfw.creq_ring_id);
1011         if (rc) {
1012                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1013                 goto free_rcfw;
1014         }
1015         rc = bnxt_qplib_enable_rcfw_channel
1016                                 (rdev->en_dev->pdev, &rdev->rcfw,
1017                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1018                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1019                                  0, &bnxt_re_aeq_handler);
1020         if (rc) {
1021                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1022                 goto free_ring;
1023         }
1024
1025         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1026         if (rc)
1027                 goto disable_rcfw;
1028         bnxt_re_set_resource_limits(rdev);
1029
1030         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1031         if (rc) {
1032                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1033                 goto disable_rcfw;
1034         }
1035         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1036                                          rdev->qplib_ctx.stats.dma_map,
1037                                          &rdev->qplib_ctx.stats.fw_id);
1038         if (rc) {
1039                 pr_err("Failed to allocate stats context: %#x\n", rc);
1040                 goto free_ctx;
1041         }
1042
1043         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1044         if (rc) {
1045                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1046                 goto free_sctx;
1047         }
1048         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1049
1050         /* Resources based on the 'new' device caps */
1051         rc = bnxt_re_alloc_res(rdev);
1052         if (rc) {
1053                 pr_err("Failed to allocate resources: %#x\n", rc);
1054                 goto fail;
1055         }
1056         rc = bnxt_re_init_res(rdev);
1057         if (rc) {
1058                 pr_err("Failed to initialize resources: %#x\n", rc);
1059                 goto fail;
1060         }
1061
1062         rc = bnxt_re_setup_qos(rdev);
1063         if (rc)
1064                 pr_info("RoCE priority not yet configured\n");
1065
1066         INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1067         set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1068         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1069
1070         /* Register ib dev */
1071         rc = bnxt_re_register_ib(rdev);
1072         if (rc) {
1073                 pr_err("Failed to register with IB: %#x\n", rc);
1074                 goto fail;
1075         }
1076         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1077         for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1078                 rc = device_create_file(&rdev->ibdev.dev,
1079                                         bnxt_re_attributes[i]);
1080                 if (rc) {
1081                         dev_err(rdev_to_dev(rdev),
1082                                 "Failed to create IB sysfs: %#x", rc);
1083                         /* Must clean up all created device files */
1084                         for (j = 0; j < i; j++)
1085                                 device_remove_file(&rdev->ibdev.dev,
1086                                                    bnxt_re_attributes[j]);
1087                         bnxt_re_unregister_ib(rdev);
1088                         goto fail;
1089                 }
1090         }
1091         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1092         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1093         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1094
1095         return 0;
1096 free_sctx:
1097         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1098 free_ctx:
1099         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1100 disable_rcfw:
1101         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1102 free_ring:
1103         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1104 free_rcfw:
1105         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1106 fail:
1107         bnxt_re_ib_unreg(rdev, true);
1108         return rc;
1109 }
1110
1111 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1112 {
1113         struct bnxt_en_dev *en_dev = rdev->en_dev;
1114         struct net_device *netdev = rdev->netdev;
1115
1116         bnxt_re_dev_remove(rdev);
1117
1118         if (netdev)
1119                 bnxt_re_dev_unprobe(netdev, en_dev);
1120 }
1121
1122 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1123 {
1124         struct bnxt_en_dev *en_dev;
1125         int rc = 0;
1126
1127         if (!is_bnxt_re_dev(netdev))
1128                 return -ENODEV;
1129
1130         en_dev = bnxt_re_dev_probe(netdev);
1131         if (IS_ERR(en_dev)) {
1132                 if (en_dev != ERR_PTR(-ENODEV))
1133                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1134                 rc = PTR_ERR(en_dev);
1135                 goto exit;
1136         }
1137         *rdev = bnxt_re_dev_add(netdev, en_dev);
1138         if (!*rdev) {
1139                 rc = -ENOMEM;
1140                 bnxt_re_dev_unprobe(netdev, en_dev);
1141                 goto exit;
1142         }
1143 exit:
1144         return rc;
1145 }
1146
1147 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1148 {
1149         pci_dev_put(rdev->en_dev->pdev);
1150 }
1151
1152 /* Handle all deferred netevents tasks */
1153 static void bnxt_re_task(struct work_struct *work)
1154 {
1155         struct bnxt_re_work *re_work;
1156         struct bnxt_re_dev *rdev;
1157         int rc = 0;
1158
1159         re_work = container_of(work, struct bnxt_re_work, work);
1160         rdev = re_work->rdev;
1161
1162         if (re_work->event != NETDEV_REGISTER &&
1163             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1164                 return;
1165
1166         switch (re_work->event) {
1167         case NETDEV_REGISTER:
1168                 rc = bnxt_re_ib_reg(rdev);
1169                 if (rc)
1170                         dev_err(rdev_to_dev(rdev),
1171                                 "Failed to register with IB: %#x", rc);
1172                 break;
1173         case NETDEV_UP:
1174                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1175                                        IB_EVENT_PORT_ACTIVE);
1176                 break;
1177         case NETDEV_DOWN:
1178                 bnxt_re_dev_stop(rdev);
1179                 break;
1180         case NETDEV_CHANGE:
1181                 if (!netif_carrier_ok(rdev->netdev))
1182                         bnxt_re_dev_stop(rdev);
1183                 else if (netif_carrier_ok(rdev->netdev))
1184                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1185                                                IB_EVENT_PORT_ACTIVE);
1186                 break;
1187         default:
1188                 break;
1189         }
1190         kfree(re_work);
1191 }
1192
1193 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1194 {
1195         pci_dev_get(rdev->en_dev->pdev);
1196 }
1197
1198 /*
1199  * "Notifier chain callback can be invoked for the same chain from
1200  * different CPUs at the same time".
1201  *
1202  * For cases when the netdev is already present, our call to the
1203  * register_netdevice_notifier() will actually get the rtnl_lock()
1204  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1205  * events.
1206  *
1207  * But for cases when the netdev is not already present, the notifier
1208  * chain is subjected to be invoked from different CPUs simultaneously.
1209  *
1210  * This is protected by the netdev_mutex.
1211  */
1212 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1213                                 unsigned long event, void *ptr)
1214 {
1215         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1216         struct bnxt_re_work *re_work;
1217         struct bnxt_re_dev *rdev;
1218         int rc = 0;
1219         bool sch_work = false;
1220
1221         real_dev = rdma_vlan_dev_real_dev(netdev);
1222         if (!real_dev)
1223                 real_dev = netdev;
1224
1225         rdev = bnxt_re_from_netdev(real_dev);
1226         if (!rdev && event != NETDEV_REGISTER)
1227                 goto exit;
1228         if (real_dev != netdev)
1229                 goto exit;
1230
1231         switch (event) {
1232         case NETDEV_REGISTER:
1233                 if (rdev)
1234                         break;
1235                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1236                 if (rc == -ENODEV)
1237                         break;
1238                 if (rc) {
1239                         pr_err("Failed to register with the device %s: %#x\n",
1240                                real_dev->name, rc);
1241                         break;
1242                 }
1243                 bnxt_re_init_one(rdev);
1244                 sch_work = true;
1245                 break;
1246
1247         case NETDEV_UNREGISTER:
1248                 bnxt_re_ib_unreg(rdev, false);
1249                 bnxt_re_remove_one(rdev);
1250                 bnxt_re_dev_unreg(rdev);
1251                 break;
1252
1253         default:
1254                 sch_work = true;
1255                 break;
1256         }
1257         if (sch_work) {
1258                 /* Allocate for the deferred task */
1259                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1260                 if (re_work) {
1261                         re_work->rdev = rdev;
1262                         re_work->event = event;
1263                         re_work->vlan_dev = (real_dev == netdev ?
1264                                              NULL : netdev);
1265                         INIT_WORK(&re_work->work, bnxt_re_task);
1266                         queue_work(bnxt_re_wq, &re_work->work);
1267                 }
1268         }
1269
1270 exit:
1271         return NOTIFY_DONE;
1272 }
1273
1274 static struct notifier_block bnxt_re_netdev_notifier = {
1275         .notifier_call = bnxt_re_netdev_event
1276 };
1277
1278 static int __init bnxt_re_mod_init(void)
1279 {
1280         int rc = 0;
1281
1282         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1283
1284         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1285         if (!bnxt_re_wq)
1286                 return -ENOMEM;
1287
1288         INIT_LIST_HEAD(&bnxt_re_dev_list);
1289
1290         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1291         if (rc) {
1292                 pr_err("%s: Cannot register to netdevice_notifier",
1293                        ROCE_DRV_MODULE_NAME);
1294                 goto err_netdev;
1295         }
1296         return 0;
1297
1298 err_netdev:
1299         destroy_workqueue(bnxt_re_wq);
1300
1301         return rc;
1302 }
1303
1304 static void __exit bnxt_re_mod_exit(void)
1305 {
1306         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1307         if (bnxt_re_wq)
1308                 destroy_workqueue(bnxt_re_wq);
1309 }
1310
1311 module_init(bnxt_re_mod_init);
1312 module_exit(bnxt_re_mod_exit);