1 /* 2 * Broadcom NetXtreme-E RoCE driver. 3 * 4 * Copyright (c) 2016 - 2017, Broadcom. All rights reserved. The term 5 * Broadcom refers to Broadcom Limited and/or its subsidiaries. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in 21 * the documentation and/or other materials provided with the 22 * distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 33 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 34 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 * 36 * Description: Main component of the bnxt_re driver 37 */ 38 39 #include <linux/module.h> 40 #include <linux/netdevice.h> 41 #include <linux/ethtool.h> 42 #include <linux/mutex.h> 43 #include <linux/list.h> 44 #include <linux/rculist.h> 45 #include <linux/spinlock.h> 46 #include <linux/pci.h> 47 #include <net/dcbnl.h> 48 #include <net/ipv6.h> 49 #include <net/addrconf.h> 50 #include <linux/if_ether.h> 51 52 #include <rdma/ib_verbs.h> 53 #include <rdma/ib_user_verbs.h> 54 #include <rdma/ib_umem.h> 55 #include <rdma/ib_addr.h> 56 57 #include "bnxt_ulp.h" 58 #include "roce_hsi.h" 59 #include "qplib_res.h" 60 #include "qplib_sp.h" 61 #include "qplib_fp.h" 62 #include "qplib_rcfw.h" 63 #include "bnxt_re.h" 64 #include "ib_verbs.h" 65 #include <rdma/bnxt_re-abi.h> 66 #include "bnxt.h" 67 #include "hw_counters.h" 68 69 static char version[] = 70 BNXT_RE_DESC "\n"; 71 72 MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>"); 73 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver"); 74 MODULE_LICENSE("Dual BSD/GPL"); 75 76 /* globals */ 77 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list); 78 /* Mutex to protect the list of bnxt_re devices added */ 79 static DEFINE_MUTEX(bnxt_re_dev_lock); 80 static struct workqueue_struct *bnxt_re_wq; 81 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev); 82 83 static void bnxt_re_destroy_chip_ctx(struct bnxt_re_dev *rdev) 84 { 85 rdev->rcfw.res = NULL; 86 rdev->qplib_res.cctx = NULL; 87 } 88 89 static int bnxt_re_setup_chip_ctx(struct bnxt_re_dev *rdev) 90 { 91 struct bnxt_en_dev *en_dev; 92 struct bnxt *bp; 93 94 en_dev = rdev->en_dev; 95 bp = netdev_priv(en_dev->net); 96 97 rdev->chip_ctx.chip_num = bp->chip_num; 98 /* rest members to follow eventually */ 99 100 rdev->qplib_res.cctx = &rdev->chip_ctx; 101 rdev->rcfw.res = &rdev->qplib_res; 102 103 return 0; 104 } 105 106 /* SR-IOV helper functions */ 107 108 static void bnxt_re_get_sriov_func_type(struct bnxt_re_dev *rdev) 109 { 110 struct bnxt *bp; 111 112 bp = netdev_priv(rdev->en_dev->net); 113 if (BNXT_VF(bp)) 114 rdev->is_virtfn = 1; 115 } 116 117 /* Set the maximum number of each resource that the driver actually wants 118 * to allocate. This may be up to the maximum number the firmware has 119 * reserved for the function. The driver may choose to allocate fewer 120 * resources than the firmware maximum. 121 */ 122 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev) 123 { 124 u32 vf_qps = 0, vf_srqs = 0, vf_cqs = 0, vf_mrws = 0, vf_gids = 0; 125 u32 i; 126 u32 vf_pct; 127 u32 num_vfs; 128 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr; 129 130 rdev->qplib_ctx.qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT, 131 dev_attr->max_qp); 132 133 rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT_256K; 134 /* Use max_mr from fw since max_mrw does not get set */ 135 rdev->qplib_ctx.mrw_count = min_t(u32, rdev->qplib_ctx.mrw_count, 136 dev_attr->max_mr); 137 rdev->qplib_ctx.srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT, 138 dev_attr->max_srq); 139 rdev->qplib_ctx.cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT, 140 dev_attr->max_cq); 141 142 for (i = 0; i < MAX_TQM_ALLOC_REQ; i++) 143 rdev->qplib_ctx.tqm_count[i] = 144 rdev->dev_attr.tqm_alloc_reqs[i]; 145 146 if (rdev->num_vfs) { 147 /* 148 * Reserve a set of resources for the PF. Divide the remaining 149 * resources among the VFs 150 */ 151 vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF; 152 num_vfs = 100 * rdev->num_vfs; 153 vf_qps = (rdev->qplib_ctx.qpc_count * vf_pct) / num_vfs; 154 vf_srqs = (rdev->qplib_ctx.srqc_count * vf_pct) / num_vfs; 155 vf_cqs = (rdev->qplib_ctx.cq_count * vf_pct) / num_vfs; 156 /* 157 * The driver allows many more MRs than other resources. If the 158 * firmware does also, then reserve a fixed amount for the PF 159 * and divide the rest among VFs. VFs may use many MRs for NFS 160 * mounts, ISER, NVME applications, etc. If the firmware 161 * severely restricts the number of MRs, then let PF have 162 * half and divide the rest among VFs, as for the other 163 * resource types. 164 */ 165 if (rdev->qplib_ctx.mrw_count < BNXT_RE_MAX_MRW_COUNT_64K) 166 vf_mrws = rdev->qplib_ctx.mrw_count * vf_pct / num_vfs; 167 else 168 vf_mrws = (rdev->qplib_ctx.mrw_count - 169 BNXT_RE_RESVD_MR_FOR_PF) / rdev->num_vfs; 170 vf_gids = BNXT_RE_MAX_GID_PER_VF; 171 } 172 rdev->qplib_ctx.vf_res.max_mrw_per_vf = vf_mrws; 173 rdev->qplib_ctx.vf_res.max_gid_per_vf = vf_gids; 174 rdev->qplib_ctx.vf_res.max_qp_per_vf = vf_qps; 175 rdev->qplib_ctx.vf_res.max_srq_per_vf = vf_srqs; 176 rdev->qplib_ctx.vf_res.max_cq_per_vf = vf_cqs; 177 } 178 179 /* for handling bnxt_en callbacks later */ 180 static void bnxt_re_stop(void *p) 181 { 182 } 183 184 static void bnxt_re_start(void *p) 185 { 186 } 187 188 static void bnxt_re_sriov_config(void *p, int num_vfs) 189 { 190 struct bnxt_re_dev *rdev = p; 191 192 if (!rdev) 193 return; 194 195 rdev->num_vfs = num_vfs; 196 bnxt_re_set_resource_limits(rdev); 197 bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw, 198 &rdev->qplib_ctx); 199 } 200 201 static void bnxt_re_shutdown(void *p) 202 { 203 struct bnxt_re_dev *rdev = p; 204 205 if (!rdev) 206 return; 207 208 bnxt_re_ib_unreg(rdev); 209 } 210 211 static void bnxt_re_stop_irq(void *handle) 212 { 213 struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle; 214 struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw; 215 struct bnxt_qplib_nq *nq; 216 int indx; 217 218 for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) { 219 nq = &rdev->nq[indx - 1]; 220 bnxt_qplib_nq_stop_irq(nq, false); 221 } 222 223 bnxt_qplib_rcfw_stop_irq(rcfw, false); 224 } 225 226 static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent) 227 { 228 struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle; 229 struct bnxt_msix_entry *msix_ent = rdev->msix_entries; 230 struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw; 231 struct bnxt_qplib_nq *nq; 232 int indx, rc; 233 234 if (!ent) { 235 /* Not setting the f/w timeout bit in rcfw. 236 * During the driver unload the first command 237 * to f/w will timeout and that will set the 238 * timeout bit. 239 */ 240 dev_err(rdev_to_dev(rdev), "Failed to re-start IRQs\n"); 241 return; 242 } 243 244 /* Vectors may change after restart, so update with new vectors 245 * in device sctructure. 246 */ 247 for (indx = 0; indx < rdev->num_msix; indx++) 248 rdev->msix_entries[indx].vector = ent[indx].vector; 249 250 bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector, 251 false); 252 for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) { 253 nq = &rdev->nq[indx - 1]; 254 rc = bnxt_qplib_nq_start_irq(nq, indx - 1, 255 msix_ent[indx].vector, false); 256 if (rc) 257 dev_warn(rdev_to_dev(rdev), 258 "Failed to reinit NQ index %d\n", indx - 1); 259 } 260 } 261 262 static struct bnxt_ulp_ops bnxt_re_ulp_ops = { 263 .ulp_async_notifier = NULL, 264 .ulp_stop = bnxt_re_stop, 265 .ulp_start = bnxt_re_start, 266 .ulp_sriov_config = bnxt_re_sriov_config, 267 .ulp_shutdown = bnxt_re_shutdown, 268 .ulp_irq_stop = bnxt_re_stop_irq, 269 .ulp_irq_restart = bnxt_re_start_irq 270 }; 271 272 /* RoCE -> Net driver */ 273 274 /* Driver registration routines used to let the networking driver (bnxt_en) 275 * to know that the RoCE driver is now installed 276 */ 277 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev) 278 { 279 struct bnxt_en_dev *en_dev; 280 int rc; 281 282 if (!rdev) 283 return -EINVAL; 284 285 en_dev = rdev->en_dev; 286 287 rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev, 288 BNXT_ROCE_ULP); 289 return rc; 290 } 291 292 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev) 293 { 294 struct bnxt_en_dev *en_dev; 295 int rc = 0; 296 297 if (!rdev) 298 return -EINVAL; 299 300 en_dev = rdev->en_dev; 301 302 rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP, 303 &bnxt_re_ulp_ops, rdev); 304 rdev->qplib_res.pdev = rdev->en_dev->pdev; 305 return rc; 306 } 307 308 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev) 309 { 310 struct bnxt_en_dev *en_dev; 311 int rc; 312 313 if (!rdev) 314 return -EINVAL; 315 316 en_dev = rdev->en_dev; 317 318 319 rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP); 320 321 return rc; 322 } 323 324 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev) 325 { 326 int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got; 327 struct bnxt_en_dev *en_dev; 328 329 if (!rdev) 330 return -EINVAL; 331 332 en_dev = rdev->en_dev; 333 334 num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus()); 335 336 num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP, 337 rdev->msix_entries, 338 num_msix_want); 339 if (num_msix_got < BNXT_RE_MIN_MSIX) { 340 rc = -EINVAL; 341 goto done; 342 } 343 if (num_msix_got != num_msix_want) { 344 dev_warn(rdev_to_dev(rdev), 345 "Requested %d MSI-X vectors, got %d\n", 346 num_msix_want, num_msix_got); 347 } 348 rdev->num_msix = num_msix_got; 349 done: 350 return rc; 351 } 352 353 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr, 354 u16 opcd, u16 crid, u16 trid) 355 { 356 hdr->req_type = cpu_to_le16(opcd); 357 hdr->cmpl_ring = cpu_to_le16(crid); 358 hdr->target_id = cpu_to_le16(trid); 359 } 360 361 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg, 362 int msg_len, void *resp, int resp_max_len, 363 int timeout) 364 { 365 fw_msg->msg = msg; 366 fw_msg->msg_len = msg_len; 367 fw_msg->resp = resp; 368 fw_msg->resp_max_len = resp_max_len; 369 fw_msg->timeout = timeout; 370 } 371 372 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, 373 u16 fw_ring_id, int type) 374 { 375 struct bnxt_en_dev *en_dev = rdev->en_dev; 376 struct hwrm_ring_free_input req = {0}; 377 struct hwrm_ring_free_output resp; 378 struct bnxt_fw_msg fw_msg; 379 int rc = -EINVAL; 380 381 if (!en_dev) 382 return rc; 383 384 memset(&fw_msg, 0, sizeof(fw_msg)); 385 386 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1); 387 req.ring_type = type; 388 req.ring_id = cpu_to_le16(fw_ring_id); 389 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 390 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 391 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 392 if (rc) 393 dev_err(rdev_to_dev(rdev), 394 "Failed to free HW ring:%d :%#x", req.ring_id, rc); 395 return rc; 396 } 397 398 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr, 399 int pages, int type, u32 ring_mask, 400 u32 map_index, u16 *fw_ring_id) 401 { 402 struct bnxt_en_dev *en_dev = rdev->en_dev; 403 struct hwrm_ring_alloc_input req = {0}; 404 struct hwrm_ring_alloc_output resp; 405 struct bnxt_fw_msg fw_msg; 406 int rc = -EINVAL; 407 408 if (!en_dev) 409 return rc; 410 411 memset(&fw_msg, 0, sizeof(fw_msg)); 412 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1); 413 req.enables = 0; 414 req.page_tbl_addr = cpu_to_le64(dma_arr[0]); 415 if (pages > 1) { 416 /* Page size is in log2 units */ 417 req.page_size = BNXT_PAGE_SHIFT; 418 req.page_tbl_depth = 1; 419 } 420 req.fbo = 0; 421 /* Association of ring index with doorbell index and MSIX number */ 422 req.logical_id = cpu_to_le16(map_index); 423 req.length = cpu_to_le32(ring_mask + 1); 424 req.ring_type = type; 425 req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX; 426 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 427 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 428 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 429 if (!rc) 430 *fw_ring_id = le16_to_cpu(resp.ring_id); 431 432 return rc; 433 } 434 435 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev, 436 u32 fw_stats_ctx_id) 437 { 438 struct bnxt_en_dev *en_dev = rdev->en_dev; 439 struct hwrm_stat_ctx_free_input req = {0}; 440 struct bnxt_fw_msg fw_msg; 441 int rc = -EINVAL; 442 443 if (!en_dev) 444 return rc; 445 446 memset(&fw_msg, 0, sizeof(fw_msg)); 447 448 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1); 449 req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id); 450 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req, 451 sizeof(req), DFLT_HWRM_CMD_TIMEOUT); 452 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 453 if (rc) 454 dev_err(rdev_to_dev(rdev), 455 "Failed to free HW stats context %#x", rc); 456 457 return rc; 458 } 459 460 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev, 461 dma_addr_t dma_map, 462 u32 *fw_stats_ctx_id) 463 { 464 struct hwrm_stat_ctx_alloc_output resp = {0}; 465 struct hwrm_stat_ctx_alloc_input req = {0}; 466 struct bnxt_en_dev *en_dev = rdev->en_dev; 467 struct bnxt_fw_msg fw_msg; 468 int rc = -EINVAL; 469 470 *fw_stats_ctx_id = INVALID_STATS_CTX_ID; 471 472 if (!en_dev) 473 return rc; 474 475 memset(&fw_msg, 0, sizeof(fw_msg)); 476 477 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1); 478 req.update_period_ms = cpu_to_le32(1000); 479 req.stats_dma_addr = cpu_to_le64(dma_map); 480 req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE; 481 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 482 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 483 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 484 if (!rc) 485 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id); 486 487 return rc; 488 } 489 490 /* Device */ 491 492 static bool is_bnxt_re_dev(struct net_device *netdev) 493 { 494 struct ethtool_drvinfo drvinfo; 495 496 if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) { 497 memset(&drvinfo, 0, sizeof(drvinfo)); 498 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo); 499 500 if (strcmp(drvinfo.driver, "bnxt_en")) 501 return false; 502 return true; 503 } 504 return false; 505 } 506 507 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev) 508 { 509 struct bnxt_re_dev *rdev; 510 511 rcu_read_lock(); 512 list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) { 513 if (rdev->netdev == netdev) { 514 rcu_read_unlock(); 515 return rdev; 516 } 517 } 518 rcu_read_unlock(); 519 return NULL; 520 } 521 522 static void bnxt_re_dev_unprobe(struct net_device *netdev, 523 struct bnxt_en_dev *en_dev) 524 { 525 dev_put(netdev); 526 module_put(en_dev->pdev->driver->driver.owner); 527 } 528 529 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev) 530 { 531 struct bnxt *bp = netdev_priv(netdev); 532 struct bnxt_en_dev *en_dev; 533 struct pci_dev *pdev; 534 535 /* Call bnxt_en's RoCE probe via indirect API */ 536 if (!bp->ulp_probe) 537 return ERR_PTR(-EINVAL); 538 539 en_dev = bp->ulp_probe(netdev); 540 if (IS_ERR(en_dev)) 541 return en_dev; 542 543 pdev = en_dev->pdev; 544 if (!pdev) 545 return ERR_PTR(-EINVAL); 546 547 if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) { 548 dev_info(&pdev->dev, 549 "%s: probe error: RoCE is not supported on this device", 550 ROCE_DRV_MODULE_NAME); 551 return ERR_PTR(-ENODEV); 552 } 553 554 /* Bump net device reference count */ 555 if (!try_module_get(pdev->driver->driver.owner)) 556 return ERR_PTR(-ENODEV); 557 558 dev_hold(netdev); 559 560 return en_dev; 561 } 562 563 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr, 564 char *buf) 565 { 566 struct bnxt_re_dev *rdev = 567 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev); 568 569 return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor); 570 } 571 static DEVICE_ATTR_RO(hw_rev); 572 573 static ssize_t hca_type_show(struct device *device, 574 struct device_attribute *attr, char *buf) 575 { 576 struct bnxt_re_dev *rdev = 577 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev); 578 579 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc); 580 } 581 static DEVICE_ATTR_RO(hca_type); 582 583 static struct attribute *bnxt_re_attributes[] = { 584 &dev_attr_hw_rev.attr, 585 &dev_attr_hca_type.attr, 586 NULL 587 }; 588 589 static const struct attribute_group bnxt_re_dev_attr_group = { 590 .attrs = bnxt_re_attributes, 591 }; 592 593 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev) 594 { 595 ib_unregister_device(&rdev->ibdev); 596 } 597 598 static const struct ib_device_ops bnxt_re_dev_ops = { 599 .add_gid = bnxt_re_add_gid, 600 .alloc_hw_stats = bnxt_re_ib_alloc_hw_stats, 601 .alloc_mr = bnxt_re_alloc_mr, 602 .alloc_pd = bnxt_re_alloc_pd, 603 .alloc_ucontext = bnxt_re_alloc_ucontext, 604 .create_ah = bnxt_re_create_ah, 605 .create_cq = bnxt_re_create_cq, 606 .create_qp = bnxt_re_create_qp, 607 .create_srq = bnxt_re_create_srq, 608 .dealloc_pd = bnxt_re_dealloc_pd, 609 .dealloc_ucontext = bnxt_re_dealloc_ucontext, 610 .del_gid = bnxt_re_del_gid, 611 .dereg_mr = bnxt_re_dereg_mr, 612 .destroy_ah = bnxt_re_destroy_ah, 613 .destroy_cq = bnxt_re_destroy_cq, 614 .destroy_qp = bnxt_re_destroy_qp, 615 .destroy_srq = bnxt_re_destroy_srq, 616 .get_dev_fw_str = bnxt_re_query_fw_str, 617 .get_dma_mr = bnxt_re_get_dma_mr, 618 .get_hw_stats = bnxt_re_ib_get_hw_stats, 619 .get_link_layer = bnxt_re_get_link_layer, 620 .get_netdev = bnxt_re_get_netdev, 621 .get_port_immutable = bnxt_re_get_port_immutable, 622 .map_mr_sg = bnxt_re_map_mr_sg, 623 .mmap = bnxt_re_mmap, 624 .modify_ah = bnxt_re_modify_ah, 625 .modify_device = bnxt_re_modify_device, 626 .modify_qp = bnxt_re_modify_qp, 627 .modify_srq = bnxt_re_modify_srq, 628 .poll_cq = bnxt_re_poll_cq, 629 .post_recv = bnxt_re_post_recv, 630 .post_send = bnxt_re_post_send, 631 .post_srq_recv = bnxt_re_post_srq_recv, 632 .query_ah = bnxt_re_query_ah, 633 .query_device = bnxt_re_query_device, 634 .query_pkey = bnxt_re_query_pkey, 635 .query_port = bnxt_re_query_port, 636 .query_qp = bnxt_re_query_qp, 637 .query_srq = bnxt_re_query_srq, 638 .reg_user_mr = bnxt_re_reg_user_mr, 639 .req_notify_cq = bnxt_re_req_notify_cq, 640 INIT_RDMA_OBJ_SIZE(ib_pd, bnxt_re_pd, ib_pd), 641 INIT_RDMA_OBJ_SIZE(ib_ucontext, bnxt_re_ucontext, ib_uctx), 642 }; 643 644 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev) 645 { 646 struct ib_device *ibdev = &rdev->ibdev; 647 648 /* ib device init */ 649 ibdev->owner = THIS_MODULE; 650 ibdev->node_type = RDMA_NODE_IB_CA; 651 strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA", 652 strlen(BNXT_RE_DESC) + 5); 653 ibdev->phys_port_cnt = 1; 654 655 bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid); 656 657 ibdev->num_comp_vectors = 1; 658 ibdev->dev.parent = &rdev->en_dev->pdev->dev; 659 ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY; 660 661 /* User space */ 662 ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION; 663 ibdev->uverbs_cmd_mask = 664 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 665 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 666 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 667 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 668 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 669 (1ull << IB_USER_VERBS_CMD_REG_MR) | 670 (1ull << IB_USER_VERBS_CMD_REREG_MR) | 671 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 672 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 673 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 674 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | 675 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 676 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 677 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 678 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 679 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 680 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | 681 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | 682 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | 683 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | 684 (1ull << IB_USER_VERBS_CMD_CREATE_AH) | 685 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) | 686 (1ull << IB_USER_VERBS_CMD_QUERY_AH) | 687 (1ull << IB_USER_VERBS_CMD_DESTROY_AH); 688 /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */ 689 690 691 rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group); 692 ibdev->driver_id = RDMA_DRIVER_BNXT_RE; 693 ib_set_device_ops(ibdev, &bnxt_re_dev_ops); 694 return ib_register_device(ibdev, "bnxt_re%d"); 695 } 696 697 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev) 698 { 699 dev_put(rdev->netdev); 700 rdev->netdev = NULL; 701 702 mutex_lock(&bnxt_re_dev_lock); 703 list_del_rcu(&rdev->list); 704 mutex_unlock(&bnxt_re_dev_lock); 705 706 synchronize_rcu(); 707 708 ib_dealloc_device(&rdev->ibdev); 709 /* rdev is gone */ 710 } 711 712 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev, 713 struct bnxt_en_dev *en_dev) 714 { 715 struct bnxt_re_dev *rdev; 716 717 /* Allocate bnxt_re_dev instance here */ 718 rdev = ib_alloc_device(bnxt_re_dev, ibdev); 719 if (!rdev) { 720 dev_err(NULL, "%s: bnxt_re_dev allocation failure!", 721 ROCE_DRV_MODULE_NAME); 722 return NULL; 723 } 724 /* Default values */ 725 rdev->netdev = netdev; 726 dev_hold(rdev->netdev); 727 rdev->en_dev = en_dev; 728 rdev->id = rdev->en_dev->pdev->devfn; 729 INIT_LIST_HEAD(&rdev->qp_list); 730 mutex_init(&rdev->qp_lock); 731 atomic_set(&rdev->qp_count, 0); 732 atomic_set(&rdev->cq_count, 0); 733 atomic_set(&rdev->srq_count, 0); 734 atomic_set(&rdev->mr_count, 0); 735 atomic_set(&rdev->mw_count, 0); 736 rdev->cosq[0] = 0xFFFF; 737 rdev->cosq[1] = 0xFFFF; 738 739 mutex_lock(&bnxt_re_dev_lock); 740 list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list); 741 mutex_unlock(&bnxt_re_dev_lock); 742 return rdev; 743 } 744 745 static int bnxt_re_handle_unaffi_async_event(struct creq_func_event 746 *unaffi_async) 747 { 748 switch (unaffi_async->event) { 749 case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR: 750 break; 751 case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR: 752 break; 753 case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR: 754 break; 755 case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR: 756 break; 757 case CREQ_FUNC_EVENT_EVENT_CQ_ERROR: 758 break; 759 case CREQ_FUNC_EVENT_EVENT_TQM_ERROR: 760 break; 761 case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR: 762 break; 763 case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR: 764 break; 765 case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR: 766 break; 767 case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR: 768 break; 769 case CREQ_FUNC_EVENT_EVENT_TIM_ERROR: 770 break; 771 default: 772 return -EINVAL; 773 } 774 return 0; 775 } 776 777 static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event, 778 struct bnxt_re_qp *qp) 779 { 780 struct ib_event event; 781 unsigned int flags; 782 783 if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) { 784 flags = bnxt_re_lock_cqs(qp); 785 bnxt_qplib_add_flush_qp(&qp->qplib_qp); 786 bnxt_re_unlock_cqs(qp, flags); 787 } 788 789 memset(&event, 0, sizeof(event)); 790 if (qp->qplib_qp.srq) { 791 event.device = &qp->rdev->ibdev; 792 event.element.qp = &qp->ib_qp; 793 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 794 } 795 796 if (event.device && qp->ib_qp.event_handler) 797 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context); 798 799 return 0; 800 } 801 802 static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async, 803 void *obj) 804 { 805 int rc = 0; 806 u8 event; 807 808 if (!obj) 809 return rc; /* QP was already dead, still return success */ 810 811 event = affi_async->event; 812 if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) { 813 struct bnxt_qplib_qp *lib_qp = obj; 814 struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp, 815 qplib_qp); 816 rc = bnxt_re_handle_qp_async_event(affi_async, qp); 817 } 818 return rc; 819 } 820 821 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw, 822 void *aeqe, void *obj) 823 { 824 struct creq_qp_event *affi_async; 825 struct creq_func_event *unaffi_async; 826 u8 type; 827 int rc; 828 829 type = ((struct creq_base *)aeqe)->type; 830 if (type == CREQ_BASE_TYPE_FUNC_EVENT) { 831 unaffi_async = aeqe; 832 rc = bnxt_re_handle_unaffi_async_event(unaffi_async); 833 } else { 834 affi_async = aeqe; 835 rc = bnxt_re_handle_affi_async_event(affi_async, obj); 836 } 837 838 return rc; 839 } 840 841 static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq, 842 struct bnxt_qplib_srq *handle, u8 event) 843 { 844 struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq, 845 qplib_srq); 846 struct ib_event ib_event; 847 int rc = 0; 848 849 if (!srq) { 850 dev_err(NULL, "%s: SRQ is NULL, SRQN not handled", 851 ROCE_DRV_MODULE_NAME); 852 rc = -EINVAL; 853 goto done; 854 } 855 ib_event.device = &srq->rdev->ibdev; 856 ib_event.element.srq = &srq->ib_srq; 857 if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT) 858 ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED; 859 else 860 ib_event.event = IB_EVENT_SRQ_ERR; 861 862 if (srq->ib_srq.event_handler) { 863 /* Lock event_handler? */ 864 (*srq->ib_srq.event_handler)(&ib_event, 865 srq->ib_srq.srq_context); 866 } 867 done: 868 return rc; 869 } 870 871 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq, 872 struct bnxt_qplib_cq *handle) 873 { 874 struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq, 875 qplib_cq); 876 877 if (!cq) { 878 dev_err(NULL, "%s: CQ is NULL, CQN not handled", 879 ROCE_DRV_MODULE_NAME); 880 return -EINVAL; 881 } 882 if (cq->ib_cq.comp_handler) { 883 /* Lock comp_handler? */ 884 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context); 885 } 886 887 return 0; 888 } 889 890 static u32 bnxt_re_get_nqdb_offset(struct bnxt_re_dev *rdev, u16 indx) 891 { 892 return bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx) ? 893 0x10000 : rdev->msix_entries[indx].db_offset; 894 } 895 896 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev) 897 { 898 int i; 899 900 for (i = 1; i < rdev->num_msix; i++) 901 bnxt_qplib_disable_nq(&rdev->nq[i - 1]); 902 903 if (rdev->qplib_res.rcfw) 904 bnxt_qplib_cleanup_res(&rdev->qplib_res); 905 } 906 907 static int bnxt_re_init_res(struct bnxt_re_dev *rdev) 908 { 909 int num_vec_enabled = 0; 910 int rc = 0, i; 911 u32 db_offt; 912 913 bnxt_qplib_init_res(&rdev->qplib_res); 914 915 for (i = 1; i < rdev->num_msix ; i++) { 916 db_offt = bnxt_re_get_nqdb_offset(rdev, i); 917 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1], 918 i - 1, rdev->msix_entries[i].vector, 919 db_offt, &bnxt_re_cqn_handler, 920 &bnxt_re_srqn_handler); 921 if (rc) { 922 dev_err(rdev_to_dev(rdev), 923 "Failed to enable NQ with rc = 0x%x", rc); 924 goto fail; 925 } 926 num_vec_enabled++; 927 } 928 return 0; 929 fail: 930 for (i = num_vec_enabled; i >= 0; i--) 931 bnxt_qplib_disable_nq(&rdev->nq[i]); 932 return rc; 933 } 934 935 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev) 936 { 937 u8 type; 938 int i; 939 940 for (i = 0; i < rdev->num_msix - 1; i++) { 941 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 942 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type); 943 rdev->nq[i].res = NULL; 944 bnxt_qplib_free_nq(&rdev->nq[i]); 945 } 946 } 947 948 static void bnxt_re_free_res(struct bnxt_re_dev *rdev) 949 { 950 bnxt_re_free_nq_res(rdev); 951 952 if (rdev->qplib_res.dpi_tbl.max) { 953 bnxt_qplib_dealloc_dpi(&rdev->qplib_res, 954 &rdev->qplib_res.dpi_tbl, 955 &rdev->dpi_privileged); 956 } 957 if (rdev->qplib_res.rcfw) { 958 bnxt_qplib_free_res(&rdev->qplib_res); 959 rdev->qplib_res.rcfw = NULL; 960 } 961 } 962 963 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev) 964 { 965 int num_vec_created = 0; 966 dma_addr_t *pg_map; 967 int rc = 0, i; 968 int pages; 969 u8 type; 970 971 /* Configure and allocate resources for qplib */ 972 rdev->qplib_res.rcfw = &rdev->rcfw; 973 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr, 974 rdev->is_virtfn); 975 if (rc) 976 goto fail; 977 978 rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev, 979 rdev->netdev, &rdev->dev_attr); 980 if (rc) 981 goto fail; 982 983 rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl, 984 &rdev->dpi_privileged, 985 rdev); 986 if (rc) 987 goto dealloc_res; 988 989 for (i = 0; i < rdev->num_msix - 1; i++) { 990 rdev->nq[i].res = &rdev->qplib_res; 991 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT + 992 BNXT_RE_MAX_SRQC_COUNT + 2; 993 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]); 994 if (rc) { 995 dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x", 996 i, rc); 997 goto free_nq; 998 } 999 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1000 pg_map = rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr; 1001 pages = rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count; 1002 rc = bnxt_re_net_ring_alloc(rdev, pg_map, pages, type, 1003 BNXT_QPLIB_NQE_MAX_CNT - 1, 1004 rdev->msix_entries[i + 1].ring_idx, 1005 &rdev->nq[i].ring_id); 1006 if (rc) { 1007 dev_err(rdev_to_dev(rdev), 1008 "Failed to allocate NQ fw id with rc = 0x%x", 1009 rc); 1010 bnxt_qplib_free_nq(&rdev->nq[i]); 1011 goto free_nq; 1012 } 1013 num_vec_created++; 1014 } 1015 return 0; 1016 free_nq: 1017 for (i = num_vec_created; i >= 0; i--) { 1018 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1019 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type); 1020 bnxt_qplib_free_nq(&rdev->nq[i]); 1021 } 1022 bnxt_qplib_dealloc_dpi(&rdev->qplib_res, 1023 &rdev->qplib_res.dpi_tbl, 1024 &rdev->dpi_privileged); 1025 dealloc_res: 1026 bnxt_qplib_free_res(&rdev->qplib_res); 1027 1028 fail: 1029 rdev->qplib_res.rcfw = NULL; 1030 return rc; 1031 } 1032 1033 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp, 1034 u8 port_num, enum ib_event_type event) 1035 { 1036 struct ib_event ib_event; 1037 1038 ib_event.device = ibdev; 1039 if (qp) { 1040 ib_event.element.qp = qp; 1041 ib_event.event = event; 1042 if (qp->event_handler) 1043 qp->event_handler(&ib_event, qp->qp_context); 1044 1045 } else { 1046 ib_event.element.port_num = port_num; 1047 ib_event.event = event; 1048 ib_dispatch_event(&ib_event); 1049 } 1050 } 1051 1052 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN 0x02 1053 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir, 1054 u64 *cid_map) 1055 { 1056 struct hwrm_queue_pri2cos_qcfg_input req = {0}; 1057 struct bnxt *bp = netdev_priv(rdev->netdev); 1058 struct hwrm_queue_pri2cos_qcfg_output resp; 1059 struct bnxt_en_dev *en_dev = rdev->en_dev; 1060 struct bnxt_fw_msg fw_msg; 1061 u32 flags = 0; 1062 u8 *qcfgmap, *tmp_map; 1063 int rc = 0, i; 1064 1065 if (!cid_map) 1066 return -EINVAL; 1067 1068 memset(&fw_msg, 0, sizeof(fw_msg)); 1069 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, 1070 HWRM_QUEUE_PRI2COS_QCFG, -1, -1); 1071 flags |= (dir & 0x01); 1072 flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN; 1073 req.flags = cpu_to_le32(flags); 1074 req.port_id = bp->pf.port_id; 1075 1076 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 1077 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 1078 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 1079 if (rc) 1080 return rc; 1081 1082 if (resp.queue_cfg_info) { 1083 dev_warn(rdev_to_dev(rdev), 1084 "Asymmetric cos queue configuration detected"); 1085 dev_warn(rdev_to_dev(rdev), 1086 " on device, QoS may not be fully functional\n"); 1087 } 1088 qcfgmap = &resp.pri0_cos_queue_id; 1089 tmp_map = (u8 *)cid_map; 1090 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) 1091 tmp_map[i] = qcfgmap[i]; 1092 1093 return rc; 1094 } 1095 1096 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev, 1097 struct bnxt_re_qp *qp) 1098 { 1099 return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp); 1100 } 1101 1102 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev) 1103 { 1104 int mask = IB_QP_STATE; 1105 struct ib_qp_attr qp_attr; 1106 struct bnxt_re_qp *qp; 1107 1108 qp_attr.qp_state = IB_QPS_ERR; 1109 mutex_lock(&rdev->qp_lock); 1110 list_for_each_entry(qp, &rdev->qp_list, list) { 1111 /* Modify the state of all QPs except QP1/Shadow QP */ 1112 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) { 1113 if (qp->qplib_qp.state != 1114 CMDQ_MODIFY_QP_NEW_STATE_RESET && 1115 qp->qplib_qp.state != 1116 CMDQ_MODIFY_QP_NEW_STATE_ERR) { 1117 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp, 1118 1, IB_EVENT_QP_FATAL); 1119 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask, 1120 NULL); 1121 } 1122 } 1123 } 1124 mutex_unlock(&rdev->qp_lock); 1125 } 1126 1127 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev) 1128 { 1129 struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl; 1130 struct bnxt_qplib_gid gid; 1131 u16 gid_idx, index; 1132 int rc = 0; 1133 1134 if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) 1135 return 0; 1136 1137 if (!sgid_tbl) { 1138 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated"); 1139 return -EINVAL; 1140 } 1141 1142 for (index = 0; index < sgid_tbl->active; index++) { 1143 gid_idx = sgid_tbl->hw_id[index]; 1144 1145 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero, 1146 sizeof(bnxt_qplib_gid_zero))) 1147 continue; 1148 /* need to modify the VLAN enable setting of non VLAN GID only 1149 * as setting is done for VLAN GID while adding GID 1150 */ 1151 if (sgid_tbl->vlan[index]) 1152 continue; 1153 1154 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid)); 1155 1156 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx, 1157 rdev->qplib_res.netdev->dev_addr); 1158 } 1159 1160 return rc; 1161 } 1162 1163 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev) 1164 { 1165 u32 prio_map = 0, tmp_map = 0; 1166 struct net_device *netdev; 1167 struct dcb_app app; 1168 1169 netdev = rdev->netdev; 1170 1171 memset(&app, 0, sizeof(app)); 1172 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 1173 app.protocol = ETH_P_IBOE; 1174 tmp_map = dcb_ieee_getapp_mask(netdev, &app); 1175 prio_map = tmp_map; 1176 1177 app.selector = IEEE_8021QAZ_APP_SEL_DGRAM; 1178 app.protocol = ROCE_V2_UDP_DPORT; 1179 tmp_map = dcb_ieee_getapp_mask(netdev, &app); 1180 prio_map |= tmp_map; 1181 1182 return prio_map; 1183 } 1184 1185 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq) 1186 { 1187 u16 prio; 1188 u8 id; 1189 1190 for (prio = 0, id = 0; prio < 8; prio++) { 1191 if (prio_map & (1 << prio)) { 1192 cosq[id] = cid_map[prio]; 1193 id++; 1194 if (id == 2) /* Max 2 tcs supported */ 1195 break; 1196 } 1197 } 1198 } 1199 1200 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev) 1201 { 1202 u8 prio_map = 0; 1203 u64 cid_map; 1204 int rc; 1205 1206 /* Get priority for roce */ 1207 prio_map = bnxt_re_get_priority_mask(rdev); 1208 1209 if (prio_map == rdev->cur_prio_map) 1210 return 0; 1211 rdev->cur_prio_map = prio_map; 1212 /* Get cosq id for this priority */ 1213 rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map); 1214 if (rc) { 1215 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map); 1216 return rc; 1217 } 1218 /* Parse CoS IDs for app priority */ 1219 bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq); 1220 1221 /* Config BONO. */ 1222 rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq); 1223 if (rc) { 1224 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n", 1225 rdev->cosq[0], rdev->cosq[1]); 1226 return rc; 1227 } 1228 1229 /* Actual priorities are not programmed as they are already 1230 * done by L2 driver; just enable or disable priority vlan tagging 1231 */ 1232 if ((prio_map == 0 && rdev->qplib_res.prio) || 1233 (prio_map != 0 && !rdev->qplib_res.prio)) { 1234 rdev->qplib_res.prio = prio_map ? true : false; 1235 1236 bnxt_re_update_gid(rdev); 1237 } 1238 1239 return 0; 1240 } 1241 1242 static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev) 1243 { 1244 struct bnxt_en_dev *en_dev = rdev->en_dev; 1245 struct hwrm_ver_get_output resp = {0}; 1246 struct hwrm_ver_get_input req = {0}; 1247 struct bnxt_fw_msg fw_msg; 1248 int rc = 0; 1249 1250 memset(&fw_msg, 0, sizeof(fw_msg)); 1251 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, 1252 HWRM_VER_GET, -1, -1); 1253 req.hwrm_intf_maj = HWRM_VERSION_MAJOR; 1254 req.hwrm_intf_min = HWRM_VERSION_MINOR; 1255 req.hwrm_intf_upd = HWRM_VERSION_UPDATE; 1256 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 1257 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 1258 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 1259 if (rc) { 1260 dev_err(rdev_to_dev(rdev), 1261 "Failed to query HW version, rc = 0x%x", rc); 1262 return; 1263 } 1264 rdev->qplib_ctx.hwrm_intf_ver = 1265 (u64)resp.hwrm_intf_major << 48 | 1266 (u64)resp.hwrm_intf_minor << 32 | 1267 (u64)resp.hwrm_intf_build << 16 | 1268 resp.hwrm_intf_patch; 1269 } 1270 1271 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev) 1272 { 1273 u8 type; 1274 int rc; 1275 1276 if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) { 1277 /* Cleanup ib dev */ 1278 bnxt_re_unregister_ib(rdev); 1279 } 1280 if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags)) 1281 cancel_delayed_work_sync(&rdev->worker); 1282 1283 if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, 1284 &rdev->flags)) 1285 bnxt_re_cleanup_res(rdev); 1286 if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags)) 1287 bnxt_re_free_res(rdev); 1288 1289 if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) { 1290 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw); 1291 if (rc) 1292 dev_warn(rdev_to_dev(rdev), 1293 "Failed to deinitialize RCFW: %#x", rc); 1294 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id); 1295 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx); 1296 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw); 1297 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1298 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, type); 1299 bnxt_qplib_free_rcfw_channel(&rdev->rcfw); 1300 } 1301 if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) { 1302 rc = bnxt_re_free_msix(rdev); 1303 if (rc) 1304 dev_warn(rdev_to_dev(rdev), 1305 "Failed to free MSI-X vectors: %#x", rc); 1306 } 1307 1308 bnxt_re_destroy_chip_ctx(rdev); 1309 if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) { 1310 rc = bnxt_re_unregister_netdev(rdev); 1311 if (rc) 1312 dev_warn(rdev_to_dev(rdev), 1313 "Failed to unregister with netdev: %#x", rc); 1314 } 1315 } 1316 1317 /* worker thread for polling periodic events. Now used for QoS programming*/ 1318 static void bnxt_re_worker(struct work_struct *work) 1319 { 1320 struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev, 1321 worker.work); 1322 1323 bnxt_re_setup_qos(rdev); 1324 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000)); 1325 } 1326 1327 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev) 1328 { 1329 dma_addr_t *pg_map; 1330 u32 db_offt, ridx; 1331 int pages, vid; 1332 bool locked; 1333 u8 type; 1334 int rc; 1335 1336 /* Acquire rtnl lock through out this function */ 1337 rtnl_lock(); 1338 locked = true; 1339 1340 /* Registered a new RoCE device instance to netdev */ 1341 rc = bnxt_re_register_netdev(rdev); 1342 if (rc) { 1343 rtnl_unlock(); 1344 pr_err("Failed to register with netedev: %#x\n", rc); 1345 return -EINVAL; 1346 } 1347 set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags); 1348 1349 rc = bnxt_re_setup_chip_ctx(rdev); 1350 if (rc) { 1351 dev_err(rdev_to_dev(rdev), "Failed to get chip context\n"); 1352 return -EINVAL; 1353 } 1354 1355 /* Check whether VF or PF */ 1356 bnxt_re_get_sriov_func_type(rdev); 1357 1358 rc = bnxt_re_request_msix(rdev); 1359 if (rc) { 1360 pr_err("Failed to get MSI-X vectors: %#x\n", rc); 1361 rc = -EINVAL; 1362 goto fail; 1363 } 1364 set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags); 1365 1366 bnxt_re_query_hwrm_intf_version(rdev); 1367 1368 /* Establish RCFW Communication Channel to initialize the context 1369 * memory for the function and all child VFs 1370 */ 1371 rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw, 1372 &rdev->qplib_ctx, 1373 BNXT_RE_MAX_QPC_COUNT); 1374 if (rc) { 1375 pr_err("Failed to allocate RCFW Channel: %#x\n", rc); 1376 goto fail; 1377 } 1378 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1379 pg_map = rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr; 1380 pages = rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count; 1381 ridx = rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx; 1382 rc = bnxt_re_net_ring_alloc(rdev, pg_map, pages, type, 1383 BNXT_QPLIB_CREQE_MAX_CNT - 1, 1384 ridx, &rdev->rcfw.creq_ring_id); 1385 if (rc) { 1386 pr_err("Failed to allocate CREQ: %#x\n", rc); 1387 goto free_rcfw; 1388 } 1389 db_offt = bnxt_re_get_nqdb_offset(rdev, BNXT_RE_AEQ_IDX); 1390 vid = rdev->msix_entries[BNXT_RE_AEQ_IDX].vector; 1391 rc = bnxt_qplib_enable_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw, 1392 vid, db_offt, rdev->is_virtfn, 1393 &bnxt_re_aeq_handler); 1394 if (rc) { 1395 pr_err("Failed to enable RCFW channel: %#x\n", rc); 1396 goto free_ring; 1397 } 1398 1399 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr, 1400 rdev->is_virtfn); 1401 if (rc) 1402 goto disable_rcfw; 1403 if (!rdev->is_virtfn) 1404 bnxt_re_set_resource_limits(rdev); 1405 1406 rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0, 1407 bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx)); 1408 if (rc) { 1409 pr_err("Failed to allocate QPLIB context: %#x\n", rc); 1410 goto disable_rcfw; 1411 } 1412 rc = bnxt_re_net_stats_ctx_alloc(rdev, 1413 rdev->qplib_ctx.stats.dma_map, 1414 &rdev->qplib_ctx.stats.fw_id); 1415 if (rc) { 1416 pr_err("Failed to allocate stats context: %#x\n", rc); 1417 goto free_ctx; 1418 } 1419 1420 rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 1421 rdev->is_virtfn); 1422 if (rc) { 1423 pr_err("Failed to initialize RCFW: %#x\n", rc); 1424 goto free_sctx; 1425 } 1426 set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags); 1427 1428 /* Resources based on the 'new' device caps */ 1429 rc = bnxt_re_alloc_res(rdev); 1430 if (rc) { 1431 pr_err("Failed to allocate resources: %#x\n", rc); 1432 goto fail; 1433 } 1434 set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags); 1435 rc = bnxt_re_init_res(rdev); 1436 if (rc) { 1437 pr_err("Failed to initialize resources: %#x\n", rc); 1438 goto fail; 1439 } 1440 1441 set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags); 1442 1443 if (!rdev->is_virtfn) { 1444 rc = bnxt_re_setup_qos(rdev); 1445 if (rc) 1446 pr_info("RoCE priority not yet configured\n"); 1447 1448 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker); 1449 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags); 1450 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000)); 1451 } 1452 1453 rtnl_unlock(); 1454 locked = false; 1455 1456 /* Register ib dev */ 1457 rc = bnxt_re_register_ib(rdev); 1458 if (rc) { 1459 pr_err("Failed to register with IB: %#x\n", rc); 1460 goto fail; 1461 } 1462 set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags); 1463 dev_info(rdev_to_dev(rdev), "Device registered successfully"); 1464 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed, 1465 &rdev->active_width); 1466 set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags); 1467 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE); 1468 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE); 1469 1470 return 0; 1471 free_sctx: 1472 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id); 1473 free_ctx: 1474 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx); 1475 disable_rcfw: 1476 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw); 1477 free_ring: 1478 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1479 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, type); 1480 free_rcfw: 1481 bnxt_qplib_free_rcfw_channel(&rdev->rcfw); 1482 fail: 1483 if (!locked) 1484 rtnl_lock(); 1485 bnxt_re_ib_unreg(rdev); 1486 rtnl_unlock(); 1487 1488 return rc; 1489 } 1490 1491 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev) 1492 { 1493 struct bnxt_en_dev *en_dev = rdev->en_dev; 1494 struct net_device *netdev = rdev->netdev; 1495 1496 bnxt_re_dev_remove(rdev); 1497 1498 if (netdev) 1499 bnxt_re_dev_unprobe(netdev, en_dev); 1500 } 1501 1502 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev) 1503 { 1504 struct bnxt_en_dev *en_dev; 1505 int rc = 0; 1506 1507 if (!is_bnxt_re_dev(netdev)) 1508 return -ENODEV; 1509 1510 en_dev = bnxt_re_dev_probe(netdev); 1511 if (IS_ERR(en_dev)) { 1512 if (en_dev != ERR_PTR(-ENODEV)) 1513 pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME); 1514 rc = PTR_ERR(en_dev); 1515 goto exit; 1516 } 1517 *rdev = bnxt_re_dev_add(netdev, en_dev); 1518 if (!*rdev) { 1519 rc = -ENOMEM; 1520 bnxt_re_dev_unprobe(netdev, en_dev); 1521 goto exit; 1522 } 1523 exit: 1524 return rc; 1525 } 1526 1527 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev) 1528 { 1529 pci_dev_put(rdev->en_dev->pdev); 1530 } 1531 1532 /* Handle all deferred netevents tasks */ 1533 static void bnxt_re_task(struct work_struct *work) 1534 { 1535 struct bnxt_re_work *re_work; 1536 struct bnxt_re_dev *rdev; 1537 int rc = 0; 1538 1539 re_work = container_of(work, struct bnxt_re_work, work); 1540 rdev = re_work->rdev; 1541 1542 if (re_work->event != NETDEV_REGISTER && 1543 !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) 1544 return; 1545 1546 switch (re_work->event) { 1547 case NETDEV_REGISTER: 1548 rc = bnxt_re_ib_reg(rdev); 1549 if (rc) { 1550 dev_err(rdev_to_dev(rdev), 1551 "Failed to register with IB: %#x", rc); 1552 bnxt_re_remove_one(rdev); 1553 bnxt_re_dev_unreg(rdev); 1554 goto exit; 1555 } 1556 break; 1557 case NETDEV_UP: 1558 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, 1559 IB_EVENT_PORT_ACTIVE); 1560 break; 1561 case NETDEV_DOWN: 1562 bnxt_re_dev_stop(rdev); 1563 break; 1564 case NETDEV_CHANGE: 1565 if (!netif_carrier_ok(rdev->netdev)) 1566 bnxt_re_dev_stop(rdev); 1567 else if (netif_carrier_ok(rdev->netdev)) 1568 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, 1569 IB_EVENT_PORT_ACTIVE); 1570 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed, 1571 &rdev->active_width); 1572 break; 1573 default: 1574 break; 1575 } 1576 smp_mb__before_atomic(); 1577 atomic_dec(&rdev->sched_count); 1578 exit: 1579 kfree(re_work); 1580 } 1581 1582 static void bnxt_re_init_one(struct bnxt_re_dev *rdev) 1583 { 1584 pci_dev_get(rdev->en_dev->pdev); 1585 } 1586 1587 /* 1588 * "Notifier chain callback can be invoked for the same chain from 1589 * different CPUs at the same time". 1590 * 1591 * For cases when the netdev is already present, our call to the 1592 * register_netdevice_notifier() will actually get the rtnl_lock() 1593 * before sending NETDEV_REGISTER and (if up) NETDEV_UP 1594 * events. 1595 * 1596 * But for cases when the netdev is not already present, the notifier 1597 * chain is subjected to be invoked from different CPUs simultaneously. 1598 * 1599 * This is protected by the netdev_mutex. 1600 */ 1601 static int bnxt_re_netdev_event(struct notifier_block *notifier, 1602 unsigned long event, void *ptr) 1603 { 1604 struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr); 1605 struct bnxt_re_work *re_work; 1606 struct bnxt_re_dev *rdev; 1607 int rc = 0; 1608 bool sch_work = false; 1609 1610 real_dev = rdma_vlan_dev_real_dev(netdev); 1611 if (!real_dev) 1612 real_dev = netdev; 1613 1614 rdev = bnxt_re_from_netdev(real_dev); 1615 if (!rdev && event != NETDEV_REGISTER) 1616 goto exit; 1617 if (real_dev != netdev) 1618 goto exit; 1619 1620 switch (event) { 1621 case NETDEV_REGISTER: 1622 if (rdev) 1623 break; 1624 rc = bnxt_re_dev_reg(&rdev, real_dev); 1625 if (rc == -ENODEV) 1626 break; 1627 if (rc) { 1628 pr_err("Failed to register with the device %s: %#x\n", 1629 real_dev->name, rc); 1630 break; 1631 } 1632 bnxt_re_init_one(rdev); 1633 sch_work = true; 1634 break; 1635 1636 case NETDEV_UNREGISTER: 1637 /* netdev notifier will call NETDEV_UNREGISTER again later since 1638 * we are still holding the reference to the netdev 1639 */ 1640 if (atomic_read(&rdev->sched_count) > 0) 1641 goto exit; 1642 bnxt_re_ib_unreg(rdev); 1643 bnxt_re_remove_one(rdev); 1644 bnxt_re_dev_unreg(rdev); 1645 break; 1646 1647 default: 1648 sch_work = true; 1649 break; 1650 } 1651 if (sch_work) { 1652 /* Allocate for the deferred task */ 1653 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC); 1654 if (re_work) { 1655 re_work->rdev = rdev; 1656 re_work->event = event; 1657 re_work->vlan_dev = (real_dev == netdev ? 1658 NULL : netdev); 1659 INIT_WORK(&re_work->work, bnxt_re_task); 1660 atomic_inc(&rdev->sched_count); 1661 queue_work(bnxt_re_wq, &re_work->work); 1662 } 1663 } 1664 1665 exit: 1666 return NOTIFY_DONE; 1667 } 1668 1669 static struct notifier_block bnxt_re_netdev_notifier = { 1670 .notifier_call = bnxt_re_netdev_event 1671 }; 1672 1673 static int __init bnxt_re_mod_init(void) 1674 { 1675 int rc = 0; 1676 1677 pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version); 1678 1679 bnxt_re_wq = create_singlethread_workqueue("bnxt_re"); 1680 if (!bnxt_re_wq) 1681 return -ENOMEM; 1682 1683 INIT_LIST_HEAD(&bnxt_re_dev_list); 1684 1685 rc = register_netdevice_notifier(&bnxt_re_netdev_notifier); 1686 if (rc) { 1687 pr_err("%s: Cannot register to netdevice_notifier", 1688 ROCE_DRV_MODULE_NAME); 1689 goto err_netdev; 1690 } 1691 return 0; 1692 1693 err_netdev: 1694 destroy_workqueue(bnxt_re_wq); 1695 1696 return rc; 1697 } 1698 1699 static void __exit bnxt_re_mod_exit(void) 1700 { 1701 struct bnxt_re_dev *rdev, *next; 1702 LIST_HEAD(to_be_deleted); 1703 1704 mutex_lock(&bnxt_re_dev_lock); 1705 /* Free all adapter allocated resources */ 1706 if (!list_empty(&bnxt_re_dev_list)) 1707 list_splice_init(&bnxt_re_dev_list, &to_be_deleted); 1708 mutex_unlock(&bnxt_re_dev_lock); 1709 /* 1710 * Cleanup the devices in reverse order so that the VF device 1711 * cleanup is done before PF cleanup 1712 */ 1713 list_for_each_entry_safe_reverse(rdev, next, &to_be_deleted, list) { 1714 dev_info(rdev_to_dev(rdev), "Unregistering Device"); 1715 /* 1716 * Flush out any scheduled tasks before destroying the 1717 * resources 1718 */ 1719 flush_workqueue(bnxt_re_wq); 1720 bnxt_re_dev_stop(rdev); 1721 /* Acquire the rtnl_lock as the L2 resources are freed here */ 1722 rtnl_lock(); 1723 bnxt_re_ib_unreg(rdev); 1724 rtnl_unlock(); 1725 bnxt_re_remove_one(rdev); 1726 bnxt_re_dev_unreg(rdev); 1727 } 1728 unregister_netdevice_notifier(&bnxt_re_netdev_notifier); 1729 if (bnxt_re_wq) 1730 destroy_workqueue(bnxt_re_wq); 1731 } 1732 1733 module_init(bnxt_re_mod_init); 1734 module_exit(bnxt_re_mod_exit); 1735