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 <eddie.wai@broadcom.com>");
  73 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
  74 MODULE_LICENSE("Dual BSD/GPL");
  75
  76 /* globals */
  77 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
  78 /* Mutex to protect the list of bnxt_re devices added */
  79 static DEFINE_MUTEX(bnxt_re_dev_lock);
  80 static struct workqueue_struct *bnxt_re_wq;
  81
  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                 ib_event.event = event;
 788                 if (qp->event_handler)
 789                         qp->event_handler(&ib_event, qp->qp_context);
 790
 791         } else {
 792                 ib_event.element.port_num = port_num;
 793                 ib_event.event = event;
 794                 ib_dispatch_event(&ib_event);
 795         }
 796 }
 797
 798 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
 799 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
 800                                       u64 *cid_map)
 801 {
 802         struct hwrm_queue_pri2cos_qcfg_input req = {0};
 803         struct bnxt *bp = netdev_priv(rdev->netdev);
 804         struct hwrm_queue_pri2cos_qcfg_output resp;
 805         struct bnxt_en_dev *en_dev = rdev->en_dev;
 806         struct bnxt_fw_msg fw_msg;
 807         u32 flags = 0;
 808         u8 *qcfgmap, *tmp_map;
 809         int rc = 0, i;
 810
 811         if (!cid_map)
 812                 return -EINVAL;
 813
 814         memset(&fw_msg, 0, sizeof(fw_msg));
 815         bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
 816                               HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
 817         flags |= (dir & 0x01);
 818         flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
 819         req.flags = cpu_to_le32(flags);
 820         req.port_id = bp->pf.port_id;
 821
 822         bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 823                             sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 824         rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
 825         if (rc)
 826                 return rc;
 827
 828         if (resp.queue_cfg_info) {
 829                 dev_warn(rdev_to_dev(rdev),
 830                          "Asymmetric cos queue configuration detected");
 831                 dev_warn(rdev_to_dev(rdev),
 832                          " on device, QoS may not be fully functional\n");
 833         }
 834         qcfgmap = &resp.pri0_cos_queue_id;
 835         tmp_map = (u8 *)cid_map;
 836         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 837                 tmp_map[i] = qcfgmap[i];
 838
 839         return rc;
 840 }
 841
 842 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
 843                                         struct bnxt_re_qp *qp)
 844 {
 845         return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
 846 }
 847
 848 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
 849 {
 850         int mask = IB_QP_STATE;
 851         struct ib_qp_attr qp_attr;
 852         struct bnxt_re_qp *qp;
 853
 854         qp_attr.qp_state = IB_QPS_ERR;
 855         mutex_lock(&rdev->qp_lock);
 856         list_for_each_entry(qp, &rdev->qp_list, list) {
 857                 /* Modify the state of all QPs except QP1/Shadow QP */
 858                 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
 859                         if (qp->qplib_qp.state !=
 860                             CMDQ_MODIFY_QP_NEW_STATE_RESET &&
 861                             qp->qplib_qp.state !=
 862                             CMDQ_MODIFY_QP_NEW_STATE_ERR) {
 863                                 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
 864                                                        1, IB_EVENT_QP_FATAL);
 865                                 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
 866                                                   NULL);
 867                         }
 868                 }
 869         }
 870         mutex_unlock(&rdev->qp_lock);
 871 }
 872
 873 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
 874 {
 875         struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
 876         struct bnxt_qplib_gid gid;
 877         u16 gid_idx, index;
 878         int rc = 0;
 879
 880         if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
 881                 return 0;
 882
 883         if (!sgid_tbl) {
 884                 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
 885                 return -EINVAL;
 886         }
 887
 888         for (index = 0; index < sgid_tbl->active; index++) {
 889                 gid_idx = sgid_tbl->hw_id[index];
 890
 891                 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
 892                             sizeof(bnxt_qplib_gid_zero)))
 893                         continue;
 894                 /* need to modify the VLAN enable setting of non VLAN GID only
 895                  * as setting is done for VLAN GID while adding GID
 896                  */
 897                 if (sgid_tbl->vlan[index])
 898                         continue;
 899
 900                 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
 901
 902                 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
 903                                             rdev->qplib_res.netdev->dev_addr);
 904         }
 905
 906         return rc;
 907 }
 908
 909 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
 910 {
 911         u32 prio_map = 0, tmp_map = 0;
 912         struct net_device *netdev;
 913         struct dcb_app app;
 914
 915         netdev = rdev->netdev;
 916
 917         memset(&app, 0, sizeof(app));
 918         app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
 919         app.protocol = ETH_P_IBOE;
 920         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 921         prio_map = tmp_map;
 922
 923         app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
 924         app.protocol = ROCE_V2_UDP_DPORT;
 925         tmp_map = dcb_ieee_getapp_mask(netdev, &app);
 926         prio_map |= tmp_map;
 927
 928         return prio_map;
 929 }
 930
 931 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
 932 {
 933         u16 prio;
 934         u8 id;
 935
 936         for (prio = 0, id = 0; prio < 8; prio++) {
 937                 if (prio_map & (1 << prio)) {
 938                         cosq[id] = cid_map[prio];
 939                         id++;
 940                         if (id == 2) /* Max 2 tcs supported */
 941                                 break;
 942                 }
 943         }
 944 }
 945
 946 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
 947 {
 948         u8 prio_map = 0;
 949         u64 cid_map;
 950         int rc;
 951
 952         /* Get priority for roce */
 953         prio_map = bnxt_re_get_priority_mask(rdev);
 954
 955         if (prio_map == rdev->cur_prio_map)
 956                 return 0;
 957         rdev->cur_prio_map = prio_map;
 958         /* Get cosq id for this priority */
 959         rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
 960         if (rc) {
 961                 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
 962                 return rc;
 963         }
 964         /* Parse CoS IDs for app priority */
 965         bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
 966
 967         /* Config BONO. */
 968         rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
 969         if (rc) {
 970                 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
 971                          rdev->cosq[0], rdev->cosq[1]);
 972                 return rc;
 973         }
 974
 975         /* Actual priorities are not programmed as they are already
 976          * done by L2 driver; just enable or disable priority vlan tagging
 977          */
 978         if ((prio_map == 0 && rdev->qplib_res.prio) ||
 979             (prio_map != 0 && !rdev->qplib_res.prio)) {
 980                 rdev->qplib_res.prio = prio_map ? true : false;
 981
 982                 bnxt_re_update_gid(rdev);
 983         }
 984
 985         return 0;
 986 }
 987
 988 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
 989 {
 990         int i, rc;
 991
 992         if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
 993                 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
 994                         device_remove_file(&rdev->ibdev.dev,
 995                                            bnxt_re_attributes[i]);
 996                 /* Cleanup ib dev */
 997                 bnxt_re_unregister_ib(rdev);
 998         }
 999         if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1000                 cancel_delayed_work(&rdev->worker);
1001
1002         bnxt_re_cleanup_res(rdev);
1003         bnxt_re_free_res(rdev, lock_wait);
1004
1005         if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1006                 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1007                 if (rc)
1008                         dev_warn(rdev_to_dev(rdev),
1009                                  "Failed to deinitialize RCFW: %#x", rc);
1010                 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
1011                                            lock_wait);
1012                 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1013                 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1014                 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
1015                 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1016         }
1017         if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1018                 rc = bnxt_re_free_msix(rdev, lock_wait);
1019                 if (rc)
1020                         dev_warn(rdev_to_dev(rdev),
1021                                  "Failed to free MSI-X vectors: %#x", rc);
1022         }
1023         if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1024                 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
1025                 if (rc)
1026                         dev_warn(rdev_to_dev(rdev),
1027                                  "Failed to unregister with netdev: %#x", rc);
1028         }
1029 }
1030
1031 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
1032 {
1033         u32 i;
1034
1035         rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
1036         rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
1037         rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
1038         rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
1039         for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
1040                 rdev->qplib_ctx.tqm_count[i] =
1041                 rdev->dev_attr.tqm_alloc_reqs[i];
1042 }
1043
1044 /* worker thread for polling periodic events. Now used for QoS programming*/
1045 static void bnxt_re_worker(struct work_struct *work)
1046 {
1047         struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1048                                                 worker.work);
1049
1050         bnxt_re_setup_qos(rdev);
1051         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1052 }
1053
1054 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
1055 {
1056         int i, j, rc;
1057
1058         /* Registered a new RoCE device instance to netdev */
1059         rc = bnxt_re_register_netdev(rdev);
1060         if (rc) {
1061                 pr_err("Failed to register with netedev: %#x\n", rc);
1062                 return -EINVAL;
1063         }
1064         set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1065
1066         rc = bnxt_re_request_msix(rdev);
1067         if (rc) {
1068                 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
1069                 rc = -EINVAL;
1070                 goto fail;
1071         }
1072         set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1073
1074         /* Establish RCFW Communication Channel to initialize the context
1075          * memory for the function and all child VFs
1076          */
1077         rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1078                                            BNXT_RE_MAX_QPC_COUNT);
1079         if (rc)
1080                 goto fail;
1081
1082         rc = bnxt_re_net_ring_alloc
1083                         (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1084                          rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1085                          HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1086                          rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1087                          &rdev->rcfw.creq_ring_id);
1088         if (rc) {
1089                 pr_err("Failed to allocate CREQ: %#x\n", rc);
1090                 goto free_rcfw;
1091         }
1092         rc = bnxt_qplib_enable_rcfw_channel
1093                                 (rdev->en_dev->pdev, &rdev->rcfw,
1094                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1095                                  rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1096                                  0, &bnxt_re_aeq_handler);
1097         if (rc) {
1098                 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1099                 goto free_ring;
1100         }
1101
1102         rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1103         if (rc)
1104                 goto disable_rcfw;
1105         bnxt_re_set_resource_limits(rdev);
1106
1107         rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1108         if (rc) {
1109                 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1110                 goto disable_rcfw;
1111         }
1112         rc = bnxt_re_net_stats_ctx_alloc(rdev,
1113                                          rdev->qplib_ctx.stats.dma_map,
1114                                          &rdev->qplib_ctx.stats.fw_id);
1115         if (rc) {
1116                 pr_err("Failed to allocate stats context: %#x\n", rc);
1117                 goto free_ctx;
1118         }
1119
1120         rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1121         if (rc) {
1122                 pr_err("Failed to initialize RCFW: %#x\n", rc);
1123                 goto free_sctx;
1124         }
1125         set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1126
1127         /* Resources based on the 'new' device caps */
1128         rc = bnxt_re_alloc_res(rdev);
1129         if (rc) {
1130                 pr_err("Failed to allocate resources: %#x\n", rc);
1131                 goto fail;
1132         }
1133         rc = bnxt_re_init_res(rdev);
1134         if (rc) {
1135                 pr_err("Failed to initialize resources: %#x\n", rc);
1136                 goto fail;
1137         }
1138
1139         rc = bnxt_re_setup_qos(rdev);
1140         if (rc)
1141                 pr_info("RoCE priority not yet configured\n");
1142
1143         INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1144         set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1145         schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1146
1147         /* Register ib dev */
1148         rc = bnxt_re_register_ib(rdev);
1149         if (rc) {
1150                 pr_err("Failed to register with IB: %#x\n", rc);
1151                 goto fail;
1152         }
1153         dev_info(rdev_to_dev(rdev), "Device registered successfully");
1154         for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1155                 rc = device_create_file(&rdev->ibdev.dev,
1156                                         bnxt_re_attributes[i]);
1157                 if (rc) {
1158                         dev_err(rdev_to_dev(rdev),
1159                                 "Failed to create IB sysfs: %#x", rc);
1160                         /* Must clean up all created device files */
1161                         for (j = 0; j < i; j++)
1162                                 device_remove_file(&rdev->ibdev.dev,
1163                                                    bnxt_re_attributes[j]);
1164                         bnxt_re_unregister_ib(rdev);
1165                         goto fail;
1166                 }
1167         }
1168         set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1169         ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1170                          &rdev->active_width);
1171         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1172         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1173
1174         return 0;
1175 free_sctx:
1176         bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1177 free_ctx:
1178         bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1179 disable_rcfw:
1180         bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1181 free_ring:
1182         bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1183 free_rcfw:
1184         bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1185 fail:
1186         bnxt_re_ib_unreg(rdev, true);
1187         return rc;
1188 }
1189
1190 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1191 {
1192         struct bnxt_en_dev *en_dev = rdev->en_dev;
1193         struct net_device *netdev = rdev->netdev;
1194
1195         bnxt_re_dev_remove(rdev);
1196
1197         if (netdev)
1198                 bnxt_re_dev_unprobe(netdev, en_dev);
1199 }
1200
1201 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1202 {
1203         struct bnxt_en_dev *en_dev;
1204         int rc = 0;
1205
1206         if (!is_bnxt_re_dev(netdev))
1207                 return -ENODEV;
1208
1209         en_dev = bnxt_re_dev_probe(netdev);
1210         if (IS_ERR(en_dev)) {
1211                 if (en_dev != ERR_PTR(-ENODEV))
1212                         pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1213                 rc = PTR_ERR(en_dev);
1214                 goto exit;
1215         }
1216         *rdev = bnxt_re_dev_add(netdev, en_dev);
1217         if (!*rdev) {
1218                 rc = -ENOMEM;
1219                 bnxt_re_dev_unprobe(netdev, en_dev);
1220                 goto exit;
1221         }
1222 exit:
1223         return rc;
1224 }
1225
1226 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1227 {
1228         pci_dev_put(rdev->en_dev->pdev);
1229 }
1230
1231 /* Handle all deferred netevents tasks */
1232 static void bnxt_re_task(struct work_struct *work)
1233 {
1234         struct bnxt_re_work *re_work;
1235         struct bnxt_re_dev *rdev;
1236         int rc = 0;
1237
1238         re_work = container_of(work, struct bnxt_re_work, work);
1239         rdev = re_work->rdev;
1240
1241         if (re_work->event != NETDEV_REGISTER &&
1242             !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1243                 return;
1244
1245         switch (re_work->event) {
1246         case NETDEV_REGISTER:
1247                 rc = bnxt_re_ib_reg(rdev);
1248                 if (rc) {
1249                         dev_err(rdev_to_dev(rdev),
1250                                 "Failed to register with IB: %#x", rc);
1251                         bnxt_re_remove_one(rdev);
1252                         bnxt_re_dev_unreg(rdev);
1253                 }
1254                 break;
1255         case NETDEV_UP:
1256                 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1257                                        IB_EVENT_PORT_ACTIVE);
1258                 break;
1259         case NETDEV_DOWN:
1260                 bnxt_re_dev_stop(rdev);
1261                 break;
1262         case NETDEV_CHANGE:
1263                 if (!netif_carrier_ok(rdev->netdev))
1264                         bnxt_re_dev_stop(rdev);
1265                 else if (netif_carrier_ok(rdev->netdev))
1266                         bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1267                                                IB_EVENT_PORT_ACTIVE);
1268                 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1269                                  &rdev->active_width);
1270                 break;
1271         default:
1272                 break;
1273         }
1274         smp_mb__before_atomic();
1275         clear_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1276         kfree(re_work);
1277 }
1278
1279 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1280 {
1281         pci_dev_get(rdev->en_dev->pdev);
1282 }
1283
1284 /*
1285  * "Notifier chain callback can be invoked for the same chain from
1286  * different CPUs at the same time".
1287  *
1288  * For cases when the netdev is already present, our call to the
1289  * register_netdevice_notifier() will actually get the rtnl_lock()
1290  * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1291  * events.
1292  *
1293  * But for cases when the netdev is not already present, the notifier
1294  * chain is subjected to be invoked from different CPUs simultaneously.
1295  *
1296  * This is protected by the netdev_mutex.
1297  */
1298 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1299                                 unsigned long event, void *ptr)
1300 {
1301         struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1302         struct bnxt_re_work *re_work;
1303         struct bnxt_re_dev *rdev;
1304         int rc = 0;
1305         bool sch_work = false;
1306
1307         real_dev = rdma_vlan_dev_real_dev(netdev);
1308         if (!real_dev)
1309                 real_dev = netdev;
1310
1311         rdev = bnxt_re_from_netdev(real_dev);
1312         if (!rdev && event != NETDEV_REGISTER)
1313                 goto exit;
1314         if (real_dev != netdev)
1315                 goto exit;
1316
1317         switch (event) {
1318         case NETDEV_REGISTER:
1319                 if (rdev)
1320                         break;
1321                 rc = bnxt_re_dev_reg(&rdev, real_dev);
1322                 if (rc == -ENODEV)
1323                         break;
1324                 if (rc) {
1325                         pr_err("Failed to register with the device %s: %#x\n",
1326                                real_dev->name, rc);
1327                         break;
1328                 }
1329                 bnxt_re_init_one(rdev);
1330                 sch_work = true;
1331                 break;
1332
1333         case NETDEV_UNREGISTER:
1334                 /* netdev notifier will call NETDEV_UNREGISTER again later since
1335                  * we are still holding the reference to the netdev
1336                  */
1337                 if (test_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags))
1338                         goto exit;
1339                 bnxt_re_ib_unreg(rdev, false);
1340                 bnxt_re_remove_one(rdev);
1341                 bnxt_re_dev_unreg(rdev);
1342                 break;
1343
1344         default:
1345                 sch_work = true;
1346                 break;
1347         }
1348         if (sch_work) {
1349                 /* Allocate for the deferred task */
1350                 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1351                 if (re_work) {
1352                         re_work->rdev = rdev;
1353                         re_work->event = event;
1354                         re_work->vlan_dev = (real_dev == netdev ?
1355                                              NULL : netdev);
1356                         INIT_WORK(&re_work->work, bnxt_re_task);
1357                         set_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1358                         queue_work(bnxt_re_wq, &re_work->work);
1359                 }
1360         }
1361
1362 exit:
1363         return NOTIFY_DONE;
1364 }
1365
1366 static struct notifier_block bnxt_re_netdev_notifier = {
1367         .notifier_call = bnxt_re_netdev_event
1368 };
1369
1370 static int __init bnxt_re_mod_init(void)
1371 {
1372         int rc = 0;
1373
1374         pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1375
1376         bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1377         if (!bnxt_re_wq)
1378                 return -ENOMEM;
1379
1380         INIT_LIST_HEAD(&bnxt_re_dev_list);
1381
1382         rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1383         if (rc) {
1384                 pr_err("%s: Cannot register to netdevice_notifier",
1385                        ROCE_DRV_MODULE_NAME);
1386                 goto err_netdev;
1387         }
1388         return 0;
1389
1390 err_netdev:
1391         destroy_workqueue(bnxt_re_wq);
1392
1393         return rc;
1394 }
1395
1396 static void __exit bnxt_re_mod_exit(void)
1397 {
1398         struct bnxt_re_dev *rdev;
1399         LIST_HEAD(to_be_deleted);
1400
1401         mutex_lock(&bnxt_re_dev_lock);
1402         /* Free all adapter allocated resources */
1403         if (!list_empty(&bnxt_re_dev_list))
1404                 list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
1405         mutex_unlock(&bnxt_re_dev_lock);
1406
1407         list_for_each_entry(rdev, &to_be_deleted, list) {
1408                 dev_info(rdev_to_dev(rdev), "Unregistering Device");
1409                 /*
1410                  * Flush out any scheduled tasks before destroying the
1411                  * resources
1412                  */
1413                 flush_workqueue(bnxt_re_wq);
1414                 bnxt_re_dev_stop(rdev);
1415                 bnxt_re_ib_unreg(rdev, true);
1416                 bnxt_re_remove_one(rdev);
1417                 bnxt_re_dev_unreg(rdev);
1418         }
1419         unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1420         if (bnxt_re_wq)
1421                 destroy_workqueue(bnxt_re_wq);
1422 }
1423
1424 module_init(bnxt_re_mod_init);
1425 module_exit(bnxt_re_mod_exit);