drivers/infiniband/hw/bnxt_re/main.c

   1 /*
   2  * Broadcom NetXtreme-E RoCE driver.
   3  *
   4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
   5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * BSD license below:
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Description: Main component of the bnxt_re driver
  37  */
  38
  39 #include <linux/module.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/mutex.h>
  43 #include <linux/list.h>
  44 #include <linux/rculist.h>
  45 #include <linux/spinlock.h>
  46 #include <linux/pci.h>
  47 #include <net/dcbnl.h>
  48 #include <net/ipv6.h>
  49 #include <net/addrconf.h>
  50 #include <linux/if_ether.h>
  51
  52 #include <rdma/ib_verbs.h>
  53 #include <rdma/ib_user_verbs.h>
  54 #include <rdma/ib_umem.h>
  55 #include <rdma/ib_addr.h>
  56
  57 #include "bnxt_ulp.h"
  58 #include "roce_hsi.h"
  59 #include "qplib_res.h"
  60 #include "qplib_sp.h"
  61 #include "qplib_fp.h"
  62 #include "qplib_rcfw.h"
  63 #include "bnxt_re.h"
  64 #include "ib_verbs.h"
  65 #include <rdma/bnxt_re-abi.h>
  66 #include "bnxt.h"
  67 #include "hw_counters.h"
  68
  69 static char version[] =
  70                 BNXT_RE_DESC " v" ROCE_DRV_MODULE_VERSION "\n";
  71
  72 MODULE_AUTHOR("Eddie Wai <[email protected]>");
  73 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
  74 MODULE_LICENSE("Dual BSD/GPL");
  75
  76 /* globals */
  77 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
  78 /* Mutex to protect the list of bnxt_re devices added */
  79 static DEFINE_MUTEX(bnxt_re_dev_lock);
  80 static struct workqueue_struct *bnxt_re_wq;
  81
  82 /* for handling bnxt_en callbacks later */
  83 static void bnxt_re_stop(void *p)
  84 {
  85 }
  86
  87 static void bnxt_re_start(void *p)
  88 {
  89 }
  90
  91 static void bnxt_re_sriov_config(void *p, int num_vfs)
  92 {
  93 }
  94
  95 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
  96         .ulp_async_notifier = NULL,
  97         .ulp_stop = bnxt_re_stop,
  98         .ulp_start = bnxt_re_start,
  99         .ulp_sriov_config = bnxt_re_sriov_config
 100 };
 101
 102 /* RoCE -> Net driver */
 103
 104 /* Driver registration routines used to let the networking driver (bnxt_en)
 105  * to know that the RoCE driver is now installed
 106  */
 107 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev, bool lock_wait)
 108 {
 109         struct bnxt_en_dev *en_dev;
 110         int rc;
 111
 112         if (!rdev)
 113                 return -EINVAL;
 114
 115         en_dev = rdev->en_dev;
 116         /* Acquire rtnl lock if it is not invokded from netdev event */
 117         if (lock_wait)
 118                 rtnl_lock();
 119
 120         rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
 121                                                     BNXT_ROCE_ULP);
 122         if (lock_wait)
 123                 rtnl_unlock();
 124         return rc;
 125 }
 126
 127 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
 128 {
 129         struct bnxt_en_dev *en_dev;
 130         int rc = 0;
 131
 132         if (!rdev)
 133                 return -EINVAL;
 134
 135         en_dev = rdev->en_dev;
 136
 137         rtnl_lock();
 138         rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
 139                                                   &bnxt_re_ulp_ops, rdev);
 140         rtnl_unlock();
 141         return rc;
 142 }
 143
 144 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev, bool lock_wait)
 145 {
 146         struct bnxt_en_dev *en_dev;
 147         int rc;
 148
 149         if (!rdev)
 150                 return -EINVAL;
 151
 152         en_dev = rdev->en_dev;
 153
 154         if (lock_wait)
 155                 rtnl_lock();
 156
 157         rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
 158
 159         if (lock_wait)
 160                 rtnl_unlock();
 161         return rc;
 162 }
 163
 164 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
 165 {
 166         int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got;
 167         struct bnxt_en_dev *en_dev;
 168
 169         if (!rdev)
 170                 return -EINVAL;
 171
 172         en_dev = rdev->en_dev;
 173
 174         num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus());
 175
 176         rtnl_lock();
 177         num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
 178                                                          rdev->msix_entries,
 179                                                          num_msix_want);
 180         if (num_msix_got < BNXT_RE_MIN_MSIX) {
 181                 rc = -EINVAL;
 182                 goto done;
 183         }
 184         if (num_msix_got != num_msix_want) {
 185                 dev_warn(rdev_to_dev(rdev),
 186                          "Requested %d MSI-X vectors, got %d\n",
 187                          num_msix_want, num_msix_got);
 188         }
 189         rdev->num_msix = num_msix_got;
 190 done:
 191         rtnl_unlock();
 192         return rc;
 193 }
 194
 195 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
 196                                   u16 opcd, u16 crid, u16 trid)
 197 {
 198         hdr->req_type = cpu_to_le16(opcd);
 199         hdr->cmpl_ring = cpu_to_le16(crid);
 200         hdr->target_id = cpu_to_le16(trid);
 201 }
 202
 203 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 204                                 int msg_len, void *resp, int resp_max_len,
 205                                 int timeout)
 206 {
 207         fw_msg->msg = msg;
 208         fw_msg->msg_len = msg_len;
 209         fw_msg->resp = resp;
 210         fw_msg->resp_max_len = resp_max_len;
 211         fw_msg->timeout = timeout;
 212 }
 213
 214 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id,
 215                                  bool lock_wait)
 216 {
 217         struct bnxt_en_dev *en_dev = rdev->en_dev;
 218         struct hwrm_ring_free_input req = {0};
 219         struct hwrm_ring_free_output resp;
 220         struct bnxt_fw_msg fw_msg;
 221         bool do_unlock = false;
 222         int rc = -EINVAL;
 223
 224         if (!en_dev)
 225                 return rc;
 226
 227         memset(&fw_msg, 0, sizeof(fw_msg));
 228         if (lock_wait) {
 229                 rtnl_lock();
 230                 do_unlock = true;
 231         }
 232
 233         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
 234         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 235         req.ring_id = cpu_to_le16(fw_ring_id);
 236         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 237                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 238         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 239         if (rc)
 240                 dev_err(rdev_to_dev(rdev),
 241                         "Failed to free HW ring:%d :%#x", req.ring_id, rc);
 242         if (do_unlock)
 243                 rtnl_unlock();
 244         return rc;
 245 }
 246
 247 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
 248                                   int pages, int type, u32 ring_mask,
 249                                   u32 map_index, u16 *fw_ring_id)
 250 {
 251         struct bnxt_en_dev *en_dev = rdev->en_dev;
 252         struct hwrm_ring_alloc_input req = {0};
 253         struct hwrm_ring_alloc_output resp;
 254         struct bnxt_fw_msg fw_msg;
 255         int rc = -EINVAL;
 256
 257         if (!en_dev)
 258                 return rc;
 259
 260         memset(&fw_msg, 0, sizeof(fw_msg));
 261         rtnl_lock();
 262         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
 263         req.enables = 0;
 264         req.page_tbl_addr =  cpu_to_le64(dma_arr[0]);
 265         if (pages > 1) {
 266                 /* Page size is in log2 units */
 267                 req.page_size = BNXT_PAGE_SHIFT;
 268                 req.page_tbl_depth = 1;
 269         }
 270         req.fbo = 0;
 271         /* Association of ring index with doorbell index and MSIX number */
 272         req.logical_id = cpu_to_le16(map_index);
 273         req.length = cpu_to_le32(ring_mask + 1);
 274         req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
 275         req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
 276         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 277                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 278         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 279         if (!rc)
 280                 *fw_ring_id = le16_to_cpu(resp.ring_id);
 281
 282         rtnl_unlock();
 283         return rc;
 284 }
 285
 286 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
 287                                       u32 fw_stats_ctx_id, bool lock_wait)
 288 {
 289         struct bnxt_en_dev *en_dev = rdev->en_dev;
 290         struct hwrm_stat_ctx_free_input req = {0};
 291         struct bnxt_fw_msg fw_msg;
 292         bool do_unlock = false;
 293         int rc = -EINVAL;
 294
 295         if (!en_dev)
 296                 return rc;
 297
 298         memset(&fw_msg, 0, sizeof(fw_msg));
 299         if (lock_wait) {
 300                 rtnl_lock();
 301                 do_unlock = true;
 302         }
 303
 304         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
 305         req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
 306         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
 307                             sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
 308         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 309         if (rc)
 310                 dev_err(rdev_to_dev(rdev),
 311                         "Failed to free HW stats context %#x", rc);
 312
 313         if (do_unlock)
 314                 rtnl_unlock();
 315         return rc;
 316 }
 317
 318 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
 319                                        dma_addr_t dma_map,
 320                                        u32 *fw_stats_ctx_id)
 321 {
 322         struct hwrm_stat_ctx_alloc_output resp = {0};
 323         struct hwrm_stat_ctx_alloc_input req = {0};
 324         struct bnxt_en_dev *en_dev = rdev->en_dev;
 325         struct bnxt_fw_msg fw_msg;
 326         int rc = -EINVAL;
 327
 328         *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
 329
 330         if (!en_dev)
 331                 return rc;
 332
 333         memset(&fw_msg, 0, sizeof(fw_msg));
 334         rtnl_lock();
 335
 336         bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
 337         req.update_period_ms = cpu_to_le32(1000);
 338         req.stats_dma_addr = cpu_to_le64(dma_map);
 339         req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
 340         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 341                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 342         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 343         if (!rc)
 344                 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 345
 346         rtnl_unlock();
 347         return rc;
 348 }
 349
 350 /* Device */
 351
 352 static bool is_bnxt_re_dev(struct net_device *netdev)
 353 {
 354         struct ethtool_drvinfo drvinfo;
 355
 356         if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
 357                 memset(&drvinfo, 0, sizeof(drvinfo));
 358                 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
 359
 360                 if (strcmp(drvinfo.driver, "bnxt_en"))
 361                         return false;
 362                 return true;
 363         }
 364         return false;
 365 }
 366
 367 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 368 {
 369         struct bnxt_re_dev *rdev;
 370
 371         rcu_read_lock();
 372         list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
 373                 if (rdev->netdev == netdev) {
 374                         rcu_read_unlock();
 375                         return rdev;
 376                 }
 377         }
 378         rcu_read_unlock();
 379         return NULL;
 380 }
 381
 382 static void bnxt_re_dev_unprobe(struct net_device *netdev,
 383                                 struct bnxt_en_dev *en_dev)
 384 {
 385         dev_put(netdev);
 386         module_put(en_dev->pdev->driver->driver.owner);
 387 }
 388
 389 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 390 {
 391         struct bnxt *bp = netdev_priv(netdev);
 392         struct bnxt_en_dev *en_dev;
 393         struct pci_dev *pdev;
 394
 395         /* Call bnxt_en's RoCE probe via indirect API */
 396         if (!bp->ulp_probe)
 397                 return ERR_PTR(-EINVAL);
 398
 399         en_dev = bp->ulp_probe(netdev);
 400         if (IS_ERR(en_dev))
 401                 return en_dev;
 402
 403         pdev = en_dev->pdev;
 404         if (!pdev)
 405                 return ERR_PTR(-EINVAL);
 406
 407         if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
 408                 dev_dbg(&pdev->dev,
 409                         "%s: probe error: RoCE is not supported on this device",
 410                         ROCE_DRV_MODULE_NAME);
 411                 return ERR_PTR(-ENODEV);
 412         }
 413
 414         /* Bump net device reference count */
 415         if (!try_module_get(pdev->driver->driver.owner))
 416                 return ERR_PTR(-ENODEV);
 417
 418         dev_hold(netdev);
 419
 420         return en_dev;
 421 }
 422
 423 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
 424 {
 425         ib_unregister_device(&rdev->ibdev);
 426 }
 427
 428 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 429 {
 430         struct ib_device *ibdev = &rdev->ibdev;
 431
 432         /* ib device init */
 433         ibdev->owner = THIS_MODULE;
 434         ibdev->node_type = RDMA_NODE_IB_CA;
 435         strlcpy(ibdev->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
 436         strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 437                 strlen(BNXT_RE_DESC) + 5);
 438         ibdev->phys_port_cnt = 1;
 439
 440         bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
 441
 442         ibdev->num_comp_vectors = 1;
 443         ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 444         ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 445
 446         /* User space */
 447         ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
 448         ibdev->uverbs_cmd_mask =
 449                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 450                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 451                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 452                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 453                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 454                         (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 455                         (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
 456                         (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 457                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 458                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 459                         (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 460                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 461                         (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 462                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 463                         (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 464                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 465                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 466                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 467                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 468                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 469                         (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 470                         (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 471                         (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 472                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 473         /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
 474
 475         /* Kernel verbs */
 476         ibdev->query_device             = bnxt_re_query_device;
 477         ibdev->modify_device            = bnxt_re_modify_device;
 478
 479         ibdev->query_port               = bnxt_re_query_port;
 480         ibdev->get_port_immutable       = bnxt_re_get_port_immutable;
 481         ibdev->query_pkey               = bnxt_re_query_pkey;
 482         ibdev->query_gid                = bnxt_re_query_gid;
 483         ibdev->get_netdev               = bnxt_re_get_netdev;
 484         ibdev->add_gid                  = bnxt_re_add_gid;
 485         ibdev->del_gid                  = bnxt_re_del_gid;
 486         ibdev->get_link_layer           = bnxt_re_get_link_layer;
 487
 488         ibdev->alloc_pd                 = bnxt_re_alloc_pd;
 489         ibdev->dealloc_pd               = bnxt_re_dealloc_pd;
 490
 491         ibdev->create_ah                = bnxt_re_create_ah;
 492         ibdev->modify_ah                = bnxt_re_modify_ah;
 493         ibdev->query_ah                 = bnxt_re_query_ah;
 494         ibdev->destroy_ah               = bnxt_re_destroy_ah;
 495
 496         ibdev->create_qp                = bnxt_re_create_qp;
 497         ibdev->modify_qp                = bnxt_re_modify_qp;
 498         ibdev->query_qp                 = bnxt_re_query_qp;
 499         ibdev->destroy_qp               = bnxt_re_destroy_qp;
 500
 501         ibdev->post_send                = bnxt_re_post_send;
 502         ibdev->post_recv                = bnxt_re_post_recv;
 503
 504         ibdev->create_cq                = bnxt_re_create_cq;
 505         ibdev->destroy_cq               = bnxt_re_destroy_cq;
 506         ibdev->poll_cq                  = bnxt_re_poll_cq;
 507         ibdev->req_notify_cq            = bnxt_re_req_notify_cq;
 508
 509         ibdev->get_dma_mr               = bnxt_re_get_dma_mr;
 510         ibdev->dereg_mr                 = bnxt_re_dereg_mr;
 511         ibdev->alloc_mr                 = bnxt_re_alloc_mr;
 512         ibdev->map_mr_sg                = bnxt_re_map_mr_sg;
 513
 514         ibdev->reg_user_mr              = bnxt_re_reg_user_mr;
 515         ibdev->alloc_ucontext           = bnxt_re_alloc_ucontext;
 516         ibdev->dealloc_ucontext         = bnxt_re_dealloc_ucontext;
 517         ibdev->mmap                     = bnxt_re_mmap;
 518         ibdev->get_hw_stats             = bnxt_re_ib_get_hw_stats;
 519         ibdev->alloc_hw_stats           = bnxt_re_ib_alloc_hw_stats;
 520
 521         return ib_register_device(ibdev, NULL);
 522 }
 523
 524 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 525                         char *buf)
 526 {
 527         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 528
 529         return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 530 }
 531
 532 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
 533                            char *buf)
 534 {
 535         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 536
 537         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
 538 }
 539
 540 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 541                         char *buf)
 542 {
 543         struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
 544
 545         return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
 546 }
 547
 548 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
 549 static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
 550 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
 551
 552 static struct device_attribute *bnxt_re_attributes[] = {
 553         &dev_attr_hw_rev,
 554         &dev_attr_fw_rev,
 555         &dev_attr_hca_type
 556 };
 557
 558 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
 559 {
 560         dev_put(rdev->netdev);
 561         rdev->netdev = NULL;
 562
 563         mutex_lock(&bnxt_re_dev_lock);
 564         list_del_rcu(&rdev->list);
 565         mutex_unlock(&bnxt_re_dev_lock);
 566
 567         synchronize_rcu();
 568         flush_workqueue(bnxt_re_wq);
 569
 570         ib_dealloc_device(&rdev->ibdev);
 571         /* rdev is gone */
 572 }
 573
 574 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
 575                                            struct bnxt_en_dev *en_dev)
 576 {
 577         struct bnxt_re_dev *rdev;
 578
 579         /* Allocate bnxt_re_dev instance here */
 580         rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
 581         if (!rdev) {
 582                 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 583                         ROCE_DRV_MODULE_NAME);
 584                 return NULL;
 585         }
 586         /* Default values */
 587         rdev->netdev = netdev;
 588         dev_hold(rdev->netdev);
 589         rdev->en_dev = en_dev;
 590         rdev->id = rdev->en_dev->pdev->devfn;
 591         INIT_LIST_HEAD(&rdev->qp_list);
 592         mutex_init(&rdev->qp_lock);
 593         atomic_set(&rdev->qp_count, 0);
 594         atomic_set(&rdev->cq_count, 0);
 595         atomic_set(&rdev->srq_count, 0);
 596         atomic_set(&rdev->mr_count, 0);
 597         atomic_set(&rdev->mw_count, 0);
 598         rdev->cosq[0] = 0xFFFF;
 599         rdev->cosq[1] = 0xFFFF;
 600
 601         mutex_lock(&bnxt_re_dev_lock);
 602         list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
 603         mutex_unlock(&bnxt_re_dev_lock);
 604         return rdev;
 605 }
 606
 607 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
 608                                struct creq_func_event *aeqe)
 609 {
 610         switch (aeqe->event) {
 611         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 612                 break;
 613         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 614                 break;
 615         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 616                 break;
 617         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 618                 break;
 619         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 620                 break;
 621         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 622                 break;
 623         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 624                 break;
 625         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 626                 break;
 627         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 628                 break;
 629         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 630                 break;
 631         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 632                 break;
 633         default:
 634                 return -EINVAL;
 635         }
 636         return 0;
 637 }
 638
 639 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
 640                                struct bnxt_qplib_cq *handle)
 641 {
 642         struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
 643                                              qplib_cq);
 644
 645         if (!cq) {
 646                 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
 647                         ROCE_DRV_MODULE_NAME);
 648                 return -EINVAL;
 649         }
 650         if (cq->ib_cq.comp_handler) {
 651                 /* Lock comp_handler? */
 652                 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
 653         }
 654
 655         return 0;
 656 }
 657
 658 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
 659 {
 660         int i;
 661
 662         if (rdev->nq[0].hwq.max_elements) {
 663                 for (i = 1; i < rdev->num_msix; i++)
 664                         bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
 665         }
 666
 667         if (rdev->qplib_res.rcfw)
 668                 bnxt_qplib_cleanup_res(&rdev->qplib_res);
 669 }
 670
 671 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
 672 {
 673         int rc = 0, i;
 674
 675         bnxt_qplib_init_res(&rdev->qplib_res);
 676
 677         for (i = 1; i < rdev->num_msix ; i++) {
 678                 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
 679                                           i - 1, rdev->msix_entries[i].vector,
 680                                           rdev->msix_entries[i].db_offset,
 681                                           &bnxt_re_cqn_handler, NULL);
 682
 683                 if (rc) {
 684                         dev_err(rdev_to_dev(rdev),
 685                                 "Failed to enable NQ with rc = 0x%x", rc);
 686                         goto fail;
 687                 }
 688         }
 689         return 0;
 690 fail:
 691         return rc;
 692 }
 693
 694 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev, bool lock_wait)
 695 {
 696         int i;
 697
 698         for (i = 0; i < rdev->num_msix - 1; i++) {
 699                 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, lock_wait);
 700                 bnxt_qplib_free_nq(&rdev->nq[i]);
 701         }
 702 }
 703
 704 static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
 705 {
 706         bnxt_re_free_nq_res(rdev, lock_wait);
 707
 708         if (rdev->qplib_res.dpi_tbl.max) {
 709                 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 710                                        &rdev->qplib_res.dpi_tbl,
 711                                        &rdev->dpi_privileged);
 712         }
 713         if (rdev->qplib_res.rcfw) {
 714                 bnxt_qplib_free_res(&rdev->qplib_res);
 715                 rdev->qplib_res.rcfw = NULL;
 716         }
 717 }
 718
 719 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 720 {
 721         int rc = 0, i;
 722
 723         /* Configure and allocate resources for qplib */
 724         rdev->qplib_res.rcfw = &rdev->rcfw;
 725         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
 726         if (rc)
 727                 goto fail;
 728
 729         rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
 730                                   rdev->netdev, &rdev->dev_attr);
 731         if (rc)
 732                 goto fail;
 733
 734         rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
 735                                   &rdev->dpi_privileged,
 736                                   rdev);
 737         if (rc)
 738                 goto dealloc_res;
 739
 740         for (i = 0; i < rdev->num_msix - 1; i++) {
 741                 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
 742                         BNXT_RE_MAX_SRQC_COUNT + 2;
 743                 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]);
 744                 if (rc) {
 745                         dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x",
 746                                 i, rc);
 747                         goto dealloc_dpi;
 748                 }
 749                 rc = bnxt_re_net_ring_alloc
 750                         (rdev, rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr,
 751                          rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count,
 752                          HWRM_RING_ALLOC_CMPL,
 753                          BNXT_QPLIB_NQE_MAX_CNT - 1,
 754                          rdev->msix_entries[i + 1].ring_idx,
 755                          &rdev->nq[i].ring_id);
 756                 if (rc) {
 757                         dev_err(rdev_to_dev(rdev),
 758                                 "Failed to allocate NQ fw id with rc = 0x%x",
 759                                 rc);
 760                         goto free_nq;
 761                 }
 762         }
 763         return 0;
 764 free_nq:
 765         for (i = 0; i < rdev->num_msix - 1; i++)
 766                 bnxt_qplib_free_nq(&rdev->nq[i]);
 767 dealloc_dpi:
 768         bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 769                                &rdev->qplib_res.dpi_tbl,
 770                                &rdev->dpi_privileged);
 771 dealloc_res:
 772         bnxt_qplib_free_res(&rdev->qplib_res);
 773
 774 fail:
 775         rdev->qplib_res.rcfw = NULL;
 776         return rc;
 777 }
 778
 779 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
 780                                    u8 port_num, enum ib_event_type event)
 781 {
 782         struct ib_event ib_event;
 783
 784         ib_event.device = ibdev;
 785         if (qp)
 786                 ib_event.element.qp = qp;
 787         else
 788                 ib_event.element.port_num = port_num;
 789         ib_event.event = event;
 790         ib_dispatch_event(&ib_event);
 791 }
 792
 793 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
 794 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
 795                                       u64 *cid_map)
 796 {
 797         struct hwrm_queue_pri2cos_qcfg_input req = {0};
 798         struct bnxt *bp = netdev_priv(rdev->netdev);
 799         struct hwrm_queue_pri2cos_qcfg_output resp;
 800         struct bnxt_en_dev *en_dev = rdev->en_dev;
 801         struct bnxt_fw_msg fw_msg;
 802         u32 flags = 0;
 803         u8 *qcfgmap, *tmp_map;
 804         int rc = 0, i;
 805
 806         if (!cid_map)
 807                 return -EINVAL;
 808
 809         memset(&fw_msg, 0, sizeof(fw_msg));
 810         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
 811                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
 812         flags |= (dir & 0x01);
 813         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
 814         req.flags = cpu_to_le32(flags);
 815         req.port_id = bp->pf.port_id;
 816
 817         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 818                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 819         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 820         if (rc)
 821                 return rc;
 822
 823         if (resp.queue_cfg_info) {
 824                 dev_warn(rdev_to_dev(rdev),
 825                          "Asymmetric cos queue configuration detected");
 826                 dev_warn(rdev_to_dev(rdev),
 827                          " on device, QoS may not be fully functional\n");
 828         }
 829         qcfgmap = &resp.pri0_cos_queue_id;
 830         tmp_map = (u8 *)cid_map;
 831         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 832                 tmp_map[i] = qcfgmap[i];
 833
 834         return rc;
 835 }
 836
 837 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
 838                                         struct bnxt_re_qp *qp)
 839 {
 840         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
 841 }
 842
 843 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
 844 {
 845         int mask = IB_QP_STATE;
 846         struct ib_qp_attr qp_attr;
 847         struct bnxt_re_qp *qp;
 848
 849         qp_attr.qp_state = IB_QPS_ERR;
 850         mutex_lock(&rdev->qp_lock);
 851         list_for_each_entry(qp, &rdev->qp_list, list) {
 852                 /* Modify the state of all QPs except QP1/Shadow QP */
 853                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
 854                         if (qp->qplib_qp.state !=
 855                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
 856                             qp->qplib_qp.state !=
 857                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 858                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
 859                                                        1, IB_EVENT_QP_FATAL);
 860                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
 861                                                   NULL);
 862                         }
 863                 }
 864         }
 865         mutex_unlock(&rdev->qp_lock);
 866 }
 867
 868 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
 869 {
 870         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
 871         struct bnxt_qplib_gid gid;
 872         u16 gid_idx, index;
 873         int rc = 0;
 874
 875         if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
 876                 return 0;
 877
 878         if (!sgid_tbl) {
 879                 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
 880                 return -EINVAL;
 881         }
 882
 883         for (index = 0; index < sgid_tbl->active; index++) {
 884                 gid_idx = sgid_tbl->hw_id[index];
 885
 886                 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
 887                             sizeof(bnxt_qplib_gid_zero)))
 888                         continue;
 889                 /* need to modify the VLAN enable setting of non VLAN GID only
 890                  * as setting is done for VLAN GID while adding GID
 891                  */
 892                 if (sgid_tbl->vlan[index])
 893                         continue;
 894
 895                 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
 896
 897                 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
 898                                             rdev->qplib_res.netdev->dev_addr);
 899         }
 900
 901         return rc;
 902 }
 903
 904 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
 905 {
 906         u32 prio_map = 0, tmp_map = 0;
 907         struct net_device *netdev;
 908         struct dcb_app app;
 909
 910         netdev = rdev->netdev;
 911
 912         memset(&app, 0, sizeof(app));
 913         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
 914         app.protocol = ETH_P_IBOE;
 915         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 916         prio_map = tmp_map;
 917
 918         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
 919         app.protocol = ROCE_V2_UDP_DPORT;
 920         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 921         prio_map |= tmp_map;
 922
 923         return prio_map;
 924 }
 925
 926 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
 927 {
 928         u16 prio;
 929         u8 id;
 930
 931         for (prio = 0, id = 0; prio < 8; prio++) {
 932                 if (prio_map & (1 << prio)) {
 933                         cosq[id] = cid_map[prio];
 934                         id++;
 935                         if (id == 2) /* Max 2 tcs supported */
 936                                 break;
 937                 }
 938         }
 939 }
 940
 941 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
 942 {
 943         u8 prio_map = 0;
 944         u64 cid_map;
 945         int rc;
 946
 947         /* Get priority for roce */
 948         prio_map = bnxt_re_get_priority_mask(rdev);
 949
 950         if (prio_map == rdev->cur_prio_map)
 951                 return 0;
 952         rdev->cur_prio_map = prio_map;
 953         /* Get cosq id for this priority */
 954         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
 955         if (rc) {
 956                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
 957                 return rc;
 958         }
 959         /* Parse CoS IDs for app priority */
 960         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
 961
 962         /* Config BONO. */
 963         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
 964         if (rc) {
 965                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
 966                          rdev->cosq[0], rdev->cosq[1]);
 967                 return rc;
 968         }
 969
 970         /* Actual priorities are not programmed as they are already
 971          * done by L2 driver; just enable or disable priority vlan tagging
 972          */
 973         if ((prio_map == 0 && rdev->qplib_res.prio) ||
 974             (prio_map != 0 && !rdev->qplib_res.prio)) {
 975                 rdev->qplib_res.prio = prio_map ? true : false;
 976
 977                 bnxt_re_update_gid(rdev);
 978         }
 979
 980         return 0;
 981 }
 982
 983 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
 984 {
 985         int i, rc;
 986
 987         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
 988                 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
 989                         device_remove_file(&rdev->ibdev.dev,
 990                                            bnxt_re_attributes[i]);
 991                 /* Cleanup ib dev */
 992                 bnxt_re_unregister_ib(rdev);
 993         }
 994         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
 995                 cancel_delayed_work(&rdev->worker);
 996
 997         bnxt_re_cleanup_res(rdev);
 998         bnxt_re_free_res(rdev, lock_wait);
 999
1000         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1001                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1002                 if (rc)
1003                         dev_warn(rdev_to_dev(rdev),
1004                                  "Failed to deinitialize RCFW: %#x", rc);
1005                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
1006                                            lock_wait);
1007                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1008                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1009                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
1010                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1011         }
1012         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1013                 rc = bnxt_re_free_msix(rdev, lock_wait);
1014                 if (rc)
1015                         dev_warn(rdev_to_dev(rdev),
1016                                  "Failed to free MSI-X vectors: %#x", rc);
1017         }
1018         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1019                 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
1020                 if (rc)
1021                         dev_warn(rdev_to_dev(rdev),
1022                                  "Failed to unregister with netdev: %#x", rc);
1023         }
1024 }
1025
1026 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
1027 {
1028         u32 i;
1029
1030         rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
1031         rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
1032         rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
1033         rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
1034         for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
1035                 rdev->qplib_ctx.tqm_count[i] =
1036                 rdev->dev_attr.tqm_alloc_reqs[i];
1037 }
1038
1039 /* worker thread for polling periodic events. Now used for QoS programming*/
1040 static void bnxt_re_worker(struct work_struct *work)
1041 {
1042         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1043                                                 worker.work);
1044
1045         bnxt_re_setup_qos(rdev);
1046         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1047 }
1048
1049 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
1050 {
1051         int i, j, rc;
1052
1053         /* Registered a new RoCE device instance to netdev */
1054         rc = bnxt_re_register_netdev(rdev);
1055         if (rc) {
1056                 pr_err("Failed to register with netedev: %#x\n", rc);
1057                 return -EINVAL;
1058         }
1059         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1060
1061         rc = bnxt_re_request_msix(rdev);
1062         if (rc) {
1063                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
1064                 rc = -EINVAL;
1065                 goto fail;
1066         }
1067         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1068
1069         /* Establish RCFW Communication Channel to initialize the context
1070          * memory for the function and all child VFs
1071          */
1072         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1073                                            BNXT_RE_MAX_QPC_COUNT);
1074         if (rc)
1075                 goto fail;
1076
1077         rc = bnxt_re_net_ring_alloc
1078                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1079                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1080                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1081                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1082                          &rdev->rcfw.creq_ring_id);
1083         if (rc) {
1084                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1085                 goto free_rcfw;
1086         }
1087         rc = bnxt_qplib_enable_rcfw_channel
1088                                 (rdev->en_dev->pdev, &rdev->rcfw,
1089                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1090                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1091                                  0, &bnxt_re_aeq_handler);
1092         if (rc) {
1093                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1094                 goto free_ring;
1095         }
1096
1097         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1098         if (rc)
1099                 goto disable_rcfw;
1100         bnxt_re_set_resource_limits(rdev);
1101
1102         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1103         if (rc) {
1104                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1105                 goto disable_rcfw;
1106         }
1107         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1108                                          rdev->qplib_ctx.stats.dma_map,
1109                                          &rdev->qplib_ctx.stats.fw_id);
1110         if (rc) {
1111                 pr_err("Failed to allocate stats context: %#x\n", rc);
1112                 goto free_ctx;
1113         }
1114
1115         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1116         if (rc) {
1117                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1118                 goto free_sctx;
1119         }
1120         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1121
1122         /* Resources based on the 'new' device caps */
1123         rc = bnxt_re_alloc_res(rdev);
1124         if (rc) {
1125                 pr_err("Failed to allocate resources: %#x\n", rc);
1126                 goto fail;
1127         }
1128         rc = bnxt_re_init_res(rdev);
1129         if (rc) {
1130                 pr_err("Failed to initialize resources: %#x\n", rc);
1131                 goto fail;
1132         }
1133
1134         rc = bnxt_re_setup_qos(rdev);
1135         if (rc)
1136                 pr_info("RoCE priority not yet configured\n");
1137
1138         INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1139         set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1140         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1141
1142         /* Register ib dev */
1143         rc = bnxt_re_register_ib(rdev);
1144         if (rc) {
1145                 pr_err("Failed to register with IB: %#x\n", rc);
1146                 goto fail;
1147         }
1148         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1149         for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1150                 rc = device_create_file(&rdev->ibdev.dev,
1151                                         bnxt_re_attributes[i]);
1152                 if (rc) {
1153                         dev_err(rdev_to_dev(rdev),
1154                                 "Failed to create IB sysfs: %#x", rc);
1155                         /* Must clean up all created device files */
1156                         for (j = 0; j < i; j++)
1157                                 device_remove_file(&rdev->ibdev.dev,
1158                                                    bnxt_re_attributes[j]);
1159                         bnxt_re_unregister_ib(rdev);
1160                         goto fail;
1161                 }
1162         }
1163         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1164         ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1165                          &rdev->active_width);
1166         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1167         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1168
1169         return 0;
1170 free_sctx:
1171         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1172 free_ctx:
1173         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1174 disable_rcfw:
1175         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1176 free_ring:
1177         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1178 free_rcfw:
1179         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1180 fail:
1181         bnxt_re_ib_unreg(rdev, true);
1182         return rc;
1183 }
1184
1185 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1186 {
1187         struct bnxt_en_dev *en_dev = rdev->en_dev;
1188         struct net_device *netdev = rdev->netdev;
1189
1190         bnxt_re_dev_remove(rdev);
1191
1192         if (netdev)
1193                 bnxt_re_dev_unprobe(netdev, en_dev);
1194 }
1195
1196 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1197 {
1198         struct bnxt_en_dev *en_dev;
1199         int rc = 0;
1200
1201         if (!is_bnxt_re_dev(netdev))
1202                 return -ENODEV;
1203
1204         en_dev = bnxt_re_dev_probe(netdev);
1205         if (IS_ERR(en_dev)) {
1206                 if (en_dev != ERR_PTR(-ENODEV))
1207                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1208                 rc = PTR_ERR(en_dev);
1209                 goto exit;
1210         }
1211         *rdev = bnxt_re_dev_add(netdev, en_dev);
1212         if (!*rdev) {
1213                 rc = -ENOMEM;
1214                 bnxt_re_dev_unprobe(netdev, en_dev);
1215                 goto exit;
1216         }
1217 exit:
1218         return rc;
1219 }
1220
1221 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1222 {
1223         pci_dev_put(rdev->en_dev->pdev);
1224 }
1225
1226 /* Handle all deferred netevents tasks */
1227 static void bnxt_re_task(struct work_struct *work)
1228 {
1229         struct bnxt_re_work *re_work;
1230         struct bnxt_re_dev *rdev;
1231         int rc = 0;
1232
1233         re_work = container_of(work, struct bnxt_re_work, work);
1234         rdev = re_work->rdev;
1235
1236         if (re_work->event != NETDEV_REGISTER &&
1237             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1238                 return;
1239
1240         switch (re_work->event) {
1241         case NETDEV_REGISTER:
1242                 rc = bnxt_re_ib_reg(rdev);
1243                 if (rc)
1244                         dev_err(rdev_to_dev(rdev),
1245                                 "Failed to register with IB: %#x", rc);
1246                 break;
1247         case NETDEV_UP:
1248                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1249                                        IB_EVENT_PORT_ACTIVE);
1250                 break;
1251         case NETDEV_DOWN:
1252                 bnxt_re_dev_stop(rdev);
1253                 break;
1254         case NETDEV_CHANGE:
1255                 if (!netif_carrier_ok(rdev->netdev))
1256                         bnxt_re_dev_stop(rdev);
1257                 else if (netif_carrier_ok(rdev->netdev))
1258                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1259                                                IB_EVENT_PORT_ACTIVE);
1260                 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1261                                  &rdev->active_width);
1262                 break;
1263         default:
1264                 break;
1265         }
1266         smp_mb__before_atomic();
1267         clear_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1268         kfree(re_work);
1269 }
1270
1271 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1272 {
1273         pci_dev_get(rdev->en_dev->pdev);
1274 }
1275
1276 /*
1277  * "Notifier chain callback can be invoked for the same chain from
1278  * different CPUs at the same time".
1279  *
1280  * For cases when the netdev is already present, our call to the
1281  * register_netdevice_notifier() will actually get the rtnl_lock()
1282  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1283  * events.
1284  *
1285  * But for cases when the netdev is not already present, the notifier
1286  * chain is subjected to be invoked from different CPUs simultaneously.
1287  *
1288  * This is protected by the netdev_mutex.
1289  */
1290 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1291                                 unsigned long event, void *ptr)
1292 {
1293         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1294         struct bnxt_re_work *re_work;
1295         struct bnxt_re_dev *rdev;
1296         int rc = 0;
1297         bool sch_work = false;
1298
1299         real_dev = rdma_vlan_dev_real_dev(netdev);
1300         if (!real_dev)
1301                 real_dev = netdev;
1302
1303         rdev = bnxt_re_from_netdev(real_dev);
1304         if (!rdev && event != NETDEV_REGISTER)
1305                 goto exit;
1306         if (real_dev != netdev)
1307                 goto exit;
1308
1309         switch (event) {
1310         case NETDEV_REGISTER:
1311                 if (rdev)
1312                         break;
1313                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1314                 if (rc == -ENODEV)
1315                         break;
1316                 if (rc) {
1317                         pr_err("Failed to register with the device %s: %#x\n",
1318                                real_dev->name, rc);
1319                         break;
1320                 }
1321                 bnxt_re_init_one(rdev);
1322                 sch_work = true;
1323                 break;
1324
1325         case NETDEV_UNREGISTER:
1326                 /* netdev notifier will call NETDEV_UNREGISTER again later since
1327                  * we are still holding the reference to the netdev
1328                  */
1329                 if (test_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags))
1330                         goto exit;
1331                 bnxt_re_ib_unreg(rdev, false);
1332                 bnxt_re_remove_one(rdev);
1333                 bnxt_re_dev_unreg(rdev);
1334                 break;
1335
1336         default:
1337                 sch_work = true;
1338                 break;
1339         }
1340         if (sch_work) {
1341                 /* Allocate for the deferred task */
1342                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1343                 if (re_work) {
1344                         re_work->rdev = rdev;
1345                         re_work->event = event;
1346                         re_work->vlan_dev = (real_dev == netdev ?
1347                                              NULL : netdev);
1348                         INIT_WORK(&re_work->work, bnxt_re_task);
1349                         set_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1350                         queue_work(bnxt_re_wq, &re_work->work);
1351                 }
1352         }
1353
1354 exit:
1355         return NOTIFY_DONE;
1356 }
1357
1358 static struct notifier_block bnxt_re_netdev_notifier = {
1359         .notifier_call = bnxt_re_netdev_event
1360 };
1361
1362 static int __init bnxt_re_mod_init(void)
1363 {
1364         int rc = 0;
1365
1366         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1367
1368         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1369         if (!bnxt_re_wq)
1370                 return -ENOMEM;
1371
1372         INIT_LIST_HEAD(&bnxt_re_dev_list);
1373
1374         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1375         if (rc) {
1376                 pr_err("%s: Cannot register to netdevice_notifier",
1377                        ROCE_DRV_MODULE_NAME);
1378                 goto err_netdev;
1379         }
1380         return 0;
1381
1382 err_netdev:
1383         destroy_workqueue(bnxt_re_wq);
1384
1385         return rc;
1386 }
1387
1388 static void __exit bnxt_re_mod_exit(void)
1389 {
1390         struct bnxt_re_dev *rdev;
1391         LIST_HEAD(to_be_deleted);
1392
1393         mutex_lock(&bnxt_re_dev_lock);
1394         /* Free all adapter allocated resources */
1395         if (!list_empty(&bnxt_re_dev_list))
1396                 list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
1397         mutex_unlock(&bnxt_re_dev_lock);
1398
1399         list_for_each_entry(rdev, &to_be_deleted, list) {
1400                 dev_info(rdev_to_dev(rdev), "Unregistering Device");
1401                 bnxt_re_dev_stop(rdev);
1402                 bnxt_re_ib_unreg(rdev, true);
1403                 bnxt_re_remove_one(rdev);
1404                 bnxt_re_dev_unreg(rdev);
1405         }
1406         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1407         if (bnxt_re_wq)
1408                 destroy_workqueue(bnxt_re_wq);
1409 }
1410
1411 module_init(bnxt_re_mod_init);
1412 module_exit(bnxt_re_mod_exit);