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         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 337                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 338         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 339         if (!rc)
 340                 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 341
 342         rtnl_unlock();
 343         return rc;
 344 }
 345
 346 /* Device */
 347
 348 static bool is_bnxt_re_dev(struct net_device *netdev)
 349 {
 350         struct ethtool_drvinfo drvinfo;
 351
 352         if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
 353                 memset(&drvinfo, 0, sizeof(drvinfo));
 354                 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
 355
 356                 if (strcmp(drvinfo.driver, "bnxt_en"))
 357                         return false;
 358                 return true;
 359         }
 360         return false;
 361 }
 362
 363 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 364 {
 365         struct bnxt_re_dev *rdev;
 366
 367         rcu_read_lock();
 368         list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
 369                 if (rdev->netdev == netdev) {
 370                         rcu_read_unlock();
 371                         return rdev;
 372                 }
 373         }
 374         rcu_read_unlock();
 375         return NULL;
 376 }
 377
 378 static void bnxt_re_dev_unprobe(struct net_device *netdev,
 379                                 struct bnxt_en_dev *en_dev)
 380 {
 381         dev_put(netdev);
 382         module_put(en_dev->pdev->driver->driver.owner);
 383 }
 384
 385 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 386 {
 387         struct bnxt *bp = netdev_priv(netdev);
 388         struct bnxt_en_dev *en_dev;
 389         struct pci_dev *pdev;
 390
 391         /* Call bnxt_en's RoCE probe via indirect API */
 392         if (!bp->ulp_probe)
 393                 return ERR_PTR(-EINVAL);
 394
 395         en_dev = bp->ulp_probe(netdev);
 396         if (IS_ERR(en_dev))
 397                 return en_dev;
 398
 399         pdev = en_dev->pdev;
 400         if (!pdev)
 401                 return ERR_PTR(-EINVAL);
 402
 403         if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
 404                 dev_dbg(&pdev->dev,
 405                         "%s: probe error: RoCE is not supported on this device",
 406                         ROCE_DRV_MODULE_NAME);
 407                 return ERR_PTR(-ENODEV);
 408         }
 409
 410         /* Bump net device reference count */
 411         if (!try_module_get(pdev->driver->driver.owner))
 412                 return ERR_PTR(-ENODEV);
 413
 414         dev_hold(netdev);
 415
 416         return en_dev;
 417 }
 418
 419 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
 420 {
 421         ib_unregister_device(&rdev->ibdev);
 422 }
 423
 424 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 425 {
 426         struct ib_device *ibdev = &rdev->ibdev;
 427
 428         /* ib device init */
 429         ibdev->owner = THIS_MODULE;
 430         ibdev->node_type = RDMA_NODE_IB_CA;
 431         strlcpy(ibdev->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
 432         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 433                 strlen(BNXT_RE_DESC) + 5);
 434         ibdev->phys_port_cnt = 1;
 435
 436         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 437
 438         ibdev->num_comp_vectors = 1;
 439         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 440         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 441
 442         /* User space */
 443         ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
 444         ibdev->uverbs_cmd_mask =
 445                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 446                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 447                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 448                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 449                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 450                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 451                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 452                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 453                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 454                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 455                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 456                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 457                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 458                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 459                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 460                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 461                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 462                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 463                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 464                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 465                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 466                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 467                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 468                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 469         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 470
 471         /* Kernel verbs */
 472         ibdev->query_device             = bnxt_re_query_device;
 473         ibdev->modify_device            = bnxt_re_modify_device;
 474
 475         ibdev->query_port               = bnxt_re_query_port;
 476         ibdev->modify_port              = bnxt_re_modify_port;
 477         ibdev->get_port_immutable       = bnxt_re_get_port_immutable;
 478         ibdev->query_pkey               = bnxt_re_query_pkey;
 479         ibdev->query_gid                = bnxt_re_query_gid;
 480         ibdev->get_netdev               = bnxt_re_get_netdev;
 481         ibdev->add_gid                  = bnxt_re_add_gid;
 482         ibdev->del_gid                  = bnxt_re_del_gid;
 483         ibdev->get_link_layer           = bnxt_re_get_link_layer;
 484
 485         ibdev->alloc_pd                 = bnxt_re_alloc_pd;
 486         ibdev->dealloc_pd               = bnxt_re_dealloc_pd;
 487
 488         ibdev->create_ah                = bnxt_re_create_ah;
 489         ibdev->modify_ah                = bnxt_re_modify_ah;
 490         ibdev->query_ah                 = bnxt_re_query_ah;
 491         ibdev->destroy_ah               = bnxt_re_destroy_ah;
 492
 493         ibdev->create_qp                = bnxt_re_create_qp;
 494         ibdev->modify_qp                = bnxt_re_modify_qp;
 495         ibdev->query_qp                 = bnxt_re_query_qp;
 496         ibdev->destroy_qp               = bnxt_re_destroy_qp;
 497
 498         ibdev->post_send                = bnxt_re_post_send;
 499         ibdev->post_recv                = bnxt_re_post_recv;
 500
 501         ibdev->create_cq                = bnxt_re_create_cq;
 502         ibdev->destroy_cq               = bnxt_re_destroy_cq;
 503         ibdev->poll_cq                  = bnxt_re_poll_cq;
 504         ibdev->req_notify_cq            = bnxt_re_req_notify_cq;
 505
 506         ibdev->get_dma_mr               = bnxt_re_get_dma_mr;
 507         ibdev->dereg_mr                 = bnxt_re_dereg_mr;
 508         ibdev->alloc_mr                 = bnxt_re_alloc_mr;
 509         ibdev->map_mr_sg                = bnxt_re_map_mr_sg;
 510         ibdev->alloc_fmr                = bnxt_re_alloc_fmr;
 511         ibdev->map_phys_fmr             = bnxt_re_map_phys_fmr;
 512         ibdev->unmap_fmr                = bnxt_re_unmap_fmr;
 513         ibdev->dealloc_fmr              = bnxt_re_dealloc_fmr;
 514
 515         ibdev->reg_user_mr              = bnxt_re_reg_user_mr;
 516         ibdev->alloc_ucontext           = bnxt_re_alloc_ucontext;
 517         ibdev->dealloc_ucontext         = bnxt_re_dealloc_ucontext;
 518         ibdev->mmap                     = bnxt_re_mmap;
 519
 520         return ib_register_device(ibdev, NULL);
 521 }
 522
 523 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 524                         char *buf)
 525 {
 526         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 527
 528         return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 529 }
 530
 531 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
 532                            char *buf)
 533 {
 534         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 535
 536         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
 537 }
 538
 539 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 540                         char *buf)
 541 {
 542         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 543
 544         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
 545 }
 546
 547 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
 548 static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
 549 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
 550
 551 static struct device_attribute *bnxt_re_attributes[] = {
 552         &dev_attr_hw_rev,
 553         &dev_attr_fw_rev,
 554         &dev_attr_hca_type
 555 };
 556
 557 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 558 {
 559         dev_put(rdev->netdev);
 560         rdev->netdev = NULL;
 561
 562         mutex_lock(&bnxt_re_dev_lock);
 563         list_del_rcu(&rdev->list);
 564         mutex_unlock(&bnxt_re_dev_lock);
 565
 566         synchronize_rcu();
 567         flush_workqueue(bnxt_re_wq);
 568
 569         ib_dealloc_device(&rdev->ibdev);
 570         /* rdev is gone */
 571 }
 572
 573 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 574                                            struct bnxt_en_dev *en_dev)
 575 {
 576         struct bnxt_re_dev *rdev;
 577
 578         /* Allocate bnxt_re_dev instance here */
 579         rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
 580         if (!rdev) {
 581                 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 582                         ROCE_DRV_MODULE_NAME);
 583                 return NULL;
 584         }
 585         /* Default values */
 586         rdev->netdev = netdev;
 587         dev_hold(rdev->netdev);
 588         rdev->en_dev = en_dev;
 589         rdev->id = rdev->en_dev->pdev->devfn;
 590         INIT_LIST_HEAD(&rdev->qp_list);
 591         mutex_init(&rdev->qp_lock);
 592         atomic_set(&rdev->qp_count, 0);
 593         atomic_set(&rdev->cq_count, 0);
 594         atomic_set(&rdev->srq_count, 0);
 595         atomic_set(&rdev->mr_count, 0);
 596         atomic_set(&rdev->mw_count, 0);
 597         rdev->cosq[0] = 0xFFFF;
 598         rdev->cosq[1] = 0xFFFF;
 599
 600         mutex_lock(&bnxt_re_dev_lock);
 601         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 602         mutex_unlock(&bnxt_re_dev_lock);
 603         return rdev;
 604 }
 605
 606 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 607                                struct creq_func_event *aeqe)
 608 {
 609         switch (aeqe->event) {
 610         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 611                 break;
 612         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 613                 break;
 614         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 615                 break;
 616         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 617                 break;
 618         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 619                 break;
 620         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 621                 break;
 622         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 623                 break;
 624         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 625                 break;
 626         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 627                 break;
 628         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 629                 break;
 630         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 631                 break;
 632         default:
 633                 return -EINVAL;
 634         }
 635         return 0;
 636 }
 637
 638 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 639                                struct bnxt_qplib_cq *handle)
 640 {
 641         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 642                                              qplib_cq);
 643
 644         if (!cq) {
 645                 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
 646                         ROCE_DRV_MODULE_NAME);
 647                 return -EINVAL;
 648         }
 649         if (cq->ib_cq.comp_handler) {
 650                 /* Lock comp_handler? */
 651                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 652         }
 653
 654         return 0;
 655 }
 656
 657 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 658 {
 659         if (rdev->nq.hwq.max_elements)
 660                 bnxt_qplib_disable_nq(&rdev->nq);
 661
 662         if (rdev->qplib_res.rcfw)
 663                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 664 }
 665
 666 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 667 {
 668         int rc = 0;
 669
 670         bnxt_qplib_init_res(&rdev->qplib_res);
 671
 672         if (rdev->msix_entries[BNXT_RE_NQ_IDX].vector <= 0)
 673                 return -EINVAL;
 674
 675         rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq,
 676                                   rdev->msix_entries[BNXT_RE_NQ_IDX].vector,
 677                                   rdev->msix_entries[BNXT_RE_NQ_IDX].db_offset,
 678                                   &bnxt_re_cqn_handler,
 679                                   NULL);
 680
 681         if (rc)
 682                 dev_err(rdev_to_dev(rdev), "Failed to enable NQ: %#x", rc);
 683
 684         return rc;
 685 }
 686
 687 static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
 688 {
 689         if (rdev->nq.hwq.max_elements) {
 690                 bnxt_re_net_ring_free(rdev, rdev->nq.ring_id, lock_wait);
 691                 bnxt_qplib_free_nq(&rdev->nq);
 692         }
 693         if (rdev->qplib_res.dpi_tbl.max) {
 694                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 695                                        &rdev->qplib_res.dpi_tbl,
 696                                        &rdev->dpi_privileged);
 697         }
 698         if (rdev->qplib_res.rcfw) {
 699                 bnxt_qplib_free_res(&rdev->qplib_res);
 700                 rdev->qplib_res.rcfw = NULL;
 701         }
 702 }
 703
 704 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 705 {
 706         int rc = 0;
 707
 708         /* Configure and allocate resources for qplib */
 709         rdev->qplib_res.rcfw = &rdev->rcfw;
 710         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
 711         if (rc)
 712                 goto fail;
 713
 714         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
 715                                   rdev->netdev, &rdev->dev_attr);
 716         if (rc)
 717                 goto fail;
 718
 719         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 720                                   &rdev->dpi_privileged,
 721                                   rdev);
 722         if (rc)
 723                 goto fail;
 724
 725         rdev->nq.hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
 726                                     BNXT_RE_MAX_SRQC_COUNT + 2;
 727         rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq);
 728         if (rc) {
 729                 dev_err(rdev_to_dev(rdev),
 730                         "Failed to allocate NQ memory: %#x", rc);
 731                 goto fail;
 732         }
 733         rc = bnxt_re_net_ring_alloc
 734                         (rdev, rdev->nq.hwq.pbl[PBL_LVL_0].pg_map_arr,
 735                          rdev->nq.hwq.pbl[rdev->nq.hwq.level].pg_count,
 736                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_NQE_MAX_CNT - 1,
 737                          rdev->msix_entries[BNXT_RE_NQ_IDX].ring_idx,
 738                          &rdev->nq.ring_id);
 739         if (rc) {
 740                 dev_err(rdev_to_dev(rdev),
 741                         "Failed to allocate NQ ring: %#x", rc);
 742                 goto free_nq;
 743         }
 744         return 0;
 745 free_nq:
 746         bnxt_qplib_free_nq(&rdev->nq);
 747 fail:
 748         rdev->qplib_res.rcfw = NULL;
 749         return rc;
 750 }
 751
 752 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
 753                                    u8 port_num, enum ib_event_type event)
 754 {
 755         struct ib_event ib_event;
 756
 757         ib_event.device = ibdev;
 758         if (qp)
 759                 ib_event.element.qp = qp;
 760         else
 761                 ib_event.element.port_num = port_num;
 762         ib_event.event = event;
 763         ib_dispatch_event(&ib_event);
 764 }
 765
 766 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
 767 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
 768                                       u64 *cid_map)
 769 {
 770         struct hwrm_queue_pri2cos_qcfg_input req = {0};
 771         struct bnxt *bp = netdev_priv(rdev->netdev);
 772         struct hwrm_queue_pri2cos_qcfg_output resp;
 773         struct bnxt_en_dev *en_dev = rdev->en_dev;
 774         struct bnxt_fw_msg fw_msg;
 775         u32 flags = 0;
 776         u8 *qcfgmap, *tmp_map;
 777         int rc = 0, i;
 778
 779         if (!cid_map)
 780                 return -EINVAL;
 781
 782         memset(&fw_msg, 0, sizeof(fw_msg));
 783         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
 784                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
 785         flags |= (dir & 0x01);
 786         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
 787         req.flags = cpu_to_le32(flags);
 788         req.port_id = bp->pf.port_id;
 789
 790         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 791                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 792         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 793         if (rc)
 794                 return rc;
 795
 796         if (resp.queue_cfg_info) {
 797                 dev_warn(rdev_to_dev(rdev),
 798                          "Asymmetric cos queue configuration detected");
 799                 dev_warn(rdev_to_dev(rdev),
 800                          " on device, QoS may not be fully functional\n");
 801         }
 802         qcfgmap = &resp.pri0_cos_queue_id;
 803         tmp_map = (u8 *)cid_map;
 804         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 805                 tmp_map[i] = qcfgmap[i];
 806
 807         return rc;
 808 }
 809
 810 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
 811                                         struct bnxt_re_qp *qp)
 812 {
 813         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
 814 }
 815
 816 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
 817 {
 818         int mask = IB_QP_STATE;
 819         struct ib_qp_attr qp_attr;
 820         struct bnxt_re_qp *qp;
 821
 822         qp_attr.qp_state = IB_QPS_ERR;
 823         mutex_lock(&rdev->qp_lock);
 824         list_for_each_entry(qp, &rdev->qp_list, list) {
 825                 /* Modify the state of all QPs except QP1/Shadow QP */
 826                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
 827                         if (qp->qplib_qp.state !=
 828                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
 829                             qp->qplib_qp.state !=
 830                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 831                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
 832                                                        1, IB_EVENT_QP_FATAL);
 833                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
 834                                                   NULL);
 835                         }
 836                 }
 837         }
 838         mutex_unlock(&rdev->qp_lock);
 839 }
 840
 841 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
 842 {
 843         u32 prio_map = 0, tmp_map = 0;
 844         struct net_device *netdev;
 845         struct dcb_app app;
 846
 847         netdev = rdev->netdev;
 848
 849         memset(&app, 0, sizeof(app));
 850         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
 851         app.protocol = ETH_P_IBOE;
 852         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 853         prio_map = tmp_map;
 854
 855         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
 856         app.protocol = ROCE_V2_UDP_DPORT;
 857         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 858         prio_map |= tmp_map;
 859
 860         if (!prio_map)
 861                 prio_map = -EFAULT;
 862         return prio_map;
 863 }
 864
 865 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
 866 {
 867         u16 prio;
 868         u8 id;
 869
 870         for (prio = 0, id = 0; prio < 8; prio++) {
 871                 if (prio_map & (1 << prio)) {
 872                         cosq[id] = cid_map[prio];
 873                         id++;
 874                         if (id == 2) /* Max 2 tcs supported */
 875                                 break;
 876                 }
 877         }
 878 }
 879
 880 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
 881 {
 882         u8 prio_map = 0;
 883         u64 cid_map;
 884         int rc;
 885
 886         /* Get priority for roce */
 887         rc = bnxt_re_get_priority_mask(rdev);
 888         if (rc < 0)
 889                 return rc;
 890         prio_map = (u8)rc;
 891
 892         if (prio_map == rdev->cur_prio_map)
 893                 return 0;
 894         rdev->cur_prio_map = prio_map;
 895         /* Get cosq id for this priority */
 896         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
 897         if (rc) {
 898                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
 899                 return rc;
 900         }
 901         /* Parse CoS IDs for app priority */
 902         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
 903
 904         /* Config BONO. */
 905         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
 906         if (rc) {
 907                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
 908                          rdev->cosq[0], rdev->cosq[1]);
 909                 return rc;
 910         }
 911
 912         return 0;
 913 }
 914
 915 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
 916 {
 917         int i, rc;
 918
 919         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
 920                 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
 921                         device_remove_file(&rdev->ibdev.dev,
 922                                            bnxt_re_attributes[i]);
 923                 /* Cleanup ib dev */
 924                 bnxt_re_unregister_ib(rdev);
 925         }
 926         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
 927                 cancel_delayed_work(&rdev->worker);
 928
 929         bnxt_re_cleanup_res(rdev);
 930         bnxt_re_free_res(rdev, lock_wait);
 931
 932         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
 933                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
 934                 if (rc)
 935                         dev_warn(rdev_to_dev(rdev),
 936                                  "Failed to deinitialize RCFW: %#x", rc);
 937                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
 938                                            lock_wait);
 939                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
 940                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
 941                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
 942                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
 943         }
 944         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
 945                 rc = bnxt_re_free_msix(rdev, lock_wait);
 946                 if (rc)
 947                         dev_warn(rdev_to_dev(rdev),
 948                                  "Failed to free MSI-X vectors: %#x", rc);
 949         }
 950         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
 951                 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
 952                 if (rc)
 953                         dev_warn(rdev_to_dev(rdev),
 954                                  "Failed to unregister with netdev: %#x", rc);
 955         }
 956 }
 957
 958 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 959 {
 960         u32 i;
 961
 962         rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
 963         rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
 964         rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
 965         rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
 966         for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
 967                 rdev->qplib_ctx.tqm_count[i] =
 968                 rdev->dev_attr.tqm_alloc_reqs[i];
 969 }
 970
 971 /* worker thread for polling periodic events. Now used for QoS programming*/
 972 static void bnxt_re_worker(struct work_struct *work)
 973 {
 974         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
 975                                                 worker.work);
 976
 977         bnxt_re_setup_qos(rdev);
 978         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
 979 }
 980
 981 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
 982 {
 983         int i, j, rc;
 984
 985         /* Registered a new RoCE device instance to netdev */
 986         rc = bnxt_re_register_netdev(rdev);
 987         if (rc) {
 988                 pr_err("Failed to register with netedev: %#x\n", rc);
 989                 return -EINVAL;
 990         }
 991         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
 992
 993         rc = bnxt_re_request_msix(rdev);
 994         if (rc) {
 995                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
 996                 rc = -EINVAL;
 997                 goto fail;
 998         }
 999         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1000
1001         /* Establish RCFW Communication Channel to initialize the context
1002          * memory for the function and all child VFs
1003          */
1004         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw);
1005         if (rc)
1006                 goto fail;
1007
1008         rc = bnxt_re_net_ring_alloc
1009                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1010                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1011                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1012                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1013                          &rdev->rcfw.creq_ring_id);
1014         if (rc) {
1015                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1016                 goto free_rcfw;
1017         }
1018         rc = bnxt_qplib_enable_rcfw_channel
1019                                 (rdev->en_dev->pdev, &rdev->rcfw,
1020                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1021                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1022                                  0, &bnxt_re_aeq_handler);
1023         if (rc) {
1024                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1025                 goto free_ring;
1026         }
1027
1028         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1029         if (rc)
1030                 goto disable_rcfw;
1031         bnxt_re_set_resource_limits(rdev);
1032
1033         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1034         if (rc) {
1035                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1036                 goto disable_rcfw;
1037         }
1038         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1039                                          rdev->qplib_ctx.stats.dma_map,
1040                                          &rdev->qplib_ctx.stats.fw_id);
1041         if (rc) {
1042                 pr_err("Failed to allocate stats context: %#x\n", rc);
1043                 goto free_ctx;
1044         }
1045
1046         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1047         if (rc) {
1048                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1049                 goto free_sctx;
1050         }
1051         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1052
1053         /* Resources based on the 'new' device caps */
1054         rc = bnxt_re_alloc_res(rdev);
1055         if (rc) {
1056                 pr_err("Failed to allocate resources: %#x\n", rc);
1057                 goto fail;
1058         }
1059         rc = bnxt_re_init_res(rdev);
1060         if (rc) {
1061                 pr_err("Failed to initialize resources: %#x\n", rc);
1062                 goto fail;
1063         }
1064
1065         rc = bnxt_re_setup_qos(rdev);
1066         if (rc)
1067                 pr_info("RoCE priority not yet configured\n");
1068
1069         INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1070         set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1071         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1072
1073         /* Register ib dev */
1074         rc = bnxt_re_register_ib(rdev);
1075         if (rc) {
1076                 pr_err("Failed to register with IB: %#x\n", rc);
1077                 goto fail;
1078         }
1079         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1080         for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1081                 rc = device_create_file(&rdev->ibdev.dev,
1082                                         bnxt_re_attributes[i]);
1083                 if (rc) {
1084                         dev_err(rdev_to_dev(rdev),
1085                                 "Failed to create IB sysfs: %#x", rc);
1086                         /* Must clean up all created device files */
1087                         for (j = 0; j < i; j++)
1088                                 device_remove_file(&rdev->ibdev.dev,
1089                                                    bnxt_re_attributes[j]);
1090                         bnxt_re_unregister_ib(rdev);
1091                         goto fail;
1092                 }
1093         }
1094         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1095         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1096         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1097
1098         return 0;
1099 free_sctx:
1100         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1101 free_ctx:
1102         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1103 disable_rcfw:
1104         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1105 free_ring:
1106         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1107 free_rcfw:
1108         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1109 fail:
1110         bnxt_re_ib_unreg(rdev, true);
1111         return rc;
1112 }
1113
1114 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1115 {
1116         struct bnxt_en_dev *en_dev = rdev->en_dev;
1117         struct net_device *netdev = rdev->netdev;
1118
1119         bnxt_re_dev_remove(rdev);
1120
1121         if (netdev)
1122                 bnxt_re_dev_unprobe(netdev, en_dev);
1123 }
1124
1125 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1126 {
1127         struct bnxt_en_dev *en_dev;
1128         int rc = 0;
1129
1130         if (!is_bnxt_re_dev(netdev))
1131                 return -ENODEV;
1132
1133         en_dev = bnxt_re_dev_probe(netdev);
1134         if (IS_ERR(en_dev)) {
1135                 if (en_dev != ERR_PTR(-ENODEV))
1136                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1137                 rc = PTR_ERR(en_dev);
1138                 goto exit;
1139         }
1140         *rdev = bnxt_re_dev_add(netdev, en_dev);
1141         if (!*rdev) {
1142                 rc = -ENOMEM;
1143                 bnxt_re_dev_unprobe(netdev, en_dev);
1144                 goto exit;
1145         }
1146 exit:
1147         return rc;
1148 }
1149
1150 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1151 {
1152         pci_dev_put(rdev->en_dev->pdev);
1153 }
1154
1155 /* Handle all deferred netevents tasks */
1156 static void bnxt_re_task(struct work_struct *work)
1157 {
1158         struct bnxt_re_work *re_work;
1159         struct bnxt_re_dev *rdev;
1160         int rc = 0;
1161
1162         re_work = container_of(work, struct bnxt_re_work, work);
1163         rdev = re_work->rdev;
1164
1165         if (re_work->event != NETDEV_REGISTER &&
1166             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1167                 return;
1168
1169         switch (re_work->event) {
1170         case NETDEV_REGISTER:
1171                 rc = bnxt_re_ib_reg(rdev);
1172                 if (rc)
1173                         dev_err(rdev_to_dev(rdev),
1174                                 "Failed to register with IB: %#x", rc);
1175                 break;
1176         case NETDEV_UP:
1177                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1178                                        IB_EVENT_PORT_ACTIVE);
1179                 break;
1180         case NETDEV_DOWN:
1181                 bnxt_re_dev_stop(rdev);
1182                 break;
1183         case NETDEV_CHANGE:
1184                 if (!netif_carrier_ok(rdev->netdev))
1185                         bnxt_re_dev_stop(rdev);
1186                 else if (netif_carrier_ok(rdev->netdev))
1187                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1188                                                IB_EVENT_PORT_ACTIVE);
1189                 break;
1190         default:
1191                 break;
1192         }
1193         kfree(re_work);
1194 }
1195
1196 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1197 {
1198         pci_dev_get(rdev->en_dev->pdev);
1199 }
1200
1201 /*
1202  * "Notifier chain callback can be invoked for the same chain from
1203  * different CPUs at the same time".
1204  *
1205  * For cases when the netdev is already present, our call to the
1206  * register_netdevice_notifier() will actually get the rtnl_lock()
1207  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1208  * events.
1209  *
1210  * But for cases when the netdev is not already present, the notifier
1211  * chain is subjected to be invoked from different CPUs simultaneously.
1212  *
1213  * This is protected by the netdev_mutex.
1214  */
1215 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1216                                 unsigned long event, void *ptr)
1217 {
1218         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1219         struct bnxt_re_work *re_work;
1220         struct bnxt_re_dev *rdev;
1221         int rc = 0;
1222         bool sch_work = false;
1223
1224         real_dev = rdma_vlan_dev_real_dev(netdev);
1225         if (!real_dev)
1226                 real_dev = netdev;
1227
1228         rdev = bnxt_re_from_netdev(real_dev);
1229         if (!rdev && event != NETDEV_REGISTER)
1230                 goto exit;
1231         if (real_dev != netdev)
1232                 goto exit;
1233
1234         switch (event) {
1235         case NETDEV_REGISTER:
1236                 if (rdev)
1237                         break;
1238                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1239                 if (rc == -ENODEV)
1240                         break;
1241                 if (rc) {
1242                         pr_err("Failed to register with the device %s: %#x\n",
1243                                real_dev->name, rc);
1244                         break;
1245                 }
1246                 bnxt_re_init_one(rdev);
1247                 sch_work = true;
1248                 break;
1249
1250         case NETDEV_UNREGISTER:
1251                 bnxt_re_ib_unreg(rdev, false);
1252                 bnxt_re_remove_one(rdev);
1253                 bnxt_re_dev_unreg(rdev);
1254                 break;
1255
1256         default:
1257                 sch_work = true;
1258                 break;
1259         }
1260         if (sch_work) {
1261                 /* Allocate for the deferred task */
1262                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1263                 if (re_work) {
1264                         re_work->rdev = rdev;
1265                         re_work->event = event;
1266                         re_work->vlan_dev = (real_dev == netdev ?
1267                                              NULL : netdev);
1268                         INIT_WORK(&re_work->work, bnxt_re_task);
1269                         queue_work(bnxt_re_wq, &re_work->work);
1270                 }
1271         }
1272
1273 exit:
1274         return NOTIFY_DONE;
1275 }
1276
1277 static struct notifier_block bnxt_re_netdev_notifier = {
1278         .notifier_call = bnxt_re_netdev_event
1279 };
1280
1281 static int __init bnxt_re_mod_init(void)
1282 {
1283         int rc = 0;
1284
1285         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1286
1287         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1288         if (!bnxt_re_wq)
1289                 return -ENOMEM;
1290
1291         INIT_LIST_HEAD(&bnxt_re_dev_list);
1292
1293         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1294         if (rc) {
1295                 pr_err("%s: Cannot register to netdevice_notifier",
1296                        ROCE_DRV_MODULE_NAME);
1297                 goto err_netdev;
1298         }
1299         return 0;
1300
1301 err_netdev:
1302         destroy_workqueue(bnxt_re_wq);
1303
1304         return rc;
1305 }
1306
1307 static void __exit bnxt_re_mod_exit(void)
1308 {
1309         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1310         if (bnxt_re_wq)
1311                 destroy_workqueue(bnxt_re_wq);
1312 }
1313
1314 module_init(bnxt_re_mod_init);
1315 module_exit(bnxt_re_mod_exit);