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_limit_pf_res(struct bnxt_re_dev *rdev) 123 { 124 struct bnxt_qplib_dev_attr *attr; 125 struct bnxt_qplib_ctx *ctx; 126 int i; 127 128 attr = &rdev->dev_attr; 129 ctx = &rdev->qplib_ctx; 130 131 ctx->qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT, 132 attr->max_qp); 133 ctx->mrw_count = BNXT_RE_MAX_MRW_COUNT_256K; 134 /* Use max_mr from fw since max_mrw does not get set */ 135 ctx->mrw_count = min_t(u32, ctx->mrw_count, attr->max_mr); 136 ctx->srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT, 137 attr->max_srq); 138 ctx->cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT, attr->max_cq); 139 if (!bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx)) 140 for (i = 0; i < MAX_TQM_ALLOC_REQ; i++) 141 rdev->qplib_ctx.tqm_count[i] = 142 rdev->dev_attr.tqm_alloc_reqs[i]; 143 } 144 145 static void bnxt_re_limit_vf_res(struct bnxt_qplib_ctx *qplib_ctx, u32 num_vf) 146 { 147 struct bnxt_qplib_vf_res *vf_res; 148 u32 mrws = 0; 149 u32 vf_pct; 150 u32 nvfs; 151 152 vf_res = &qplib_ctx->vf_res; 153 /* 154 * Reserve a set of resources for the PF. Divide the remaining 155 * resources among the VFs 156 */ 157 vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF; 158 nvfs = num_vf; 159 num_vf = 100 * num_vf; 160 vf_res->max_qp_per_vf = (qplib_ctx->qpc_count * vf_pct) / num_vf; 161 vf_res->max_srq_per_vf = (qplib_ctx->srqc_count * vf_pct) / num_vf; 162 vf_res->max_cq_per_vf = (qplib_ctx->cq_count * vf_pct) / num_vf; 163 /* 164 * The driver allows many more MRs than other resources. If the 165 * firmware does also, then reserve a fixed amount for the PF and 166 * divide the rest among VFs. VFs may use many MRs for NFS 167 * mounts, ISER, NVME applications, etc. If the firmware severely 168 * restricts the number of MRs, then let PF have half and divide 169 * the rest among VFs, as for the other resource types. 170 */ 171 if (qplib_ctx->mrw_count < BNXT_RE_MAX_MRW_COUNT_64K) { 172 mrws = qplib_ctx->mrw_count * vf_pct; 173 nvfs = num_vf; 174 } else { 175 mrws = qplib_ctx->mrw_count - BNXT_RE_RESVD_MR_FOR_PF; 176 } 177 vf_res->max_mrw_per_vf = (mrws / nvfs); 178 vf_res->max_gid_per_vf = BNXT_RE_MAX_GID_PER_VF; 179 } 180 181 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev) 182 { 183 u32 num_vfs; 184 185 memset(&rdev->qplib_ctx.vf_res, 0, sizeof(struct bnxt_qplib_vf_res)); 186 bnxt_re_limit_pf_res(rdev); 187 188 num_vfs = bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx) ? 189 BNXT_RE_GEN_P5_MAX_VF : rdev->num_vfs; 190 if (num_vfs) 191 bnxt_re_limit_vf_res(&rdev->qplib_ctx, num_vfs); 192 } 193 194 /* for handling bnxt_en callbacks later */ 195 static void bnxt_re_stop(void *p) 196 { 197 } 198 199 static void bnxt_re_start(void *p) 200 { 201 } 202 203 static void bnxt_re_sriov_config(void *p, int num_vfs) 204 { 205 struct bnxt_re_dev *rdev = p; 206 207 if (!rdev) 208 return; 209 210 rdev->num_vfs = num_vfs; 211 if (!bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx)) { 212 bnxt_re_set_resource_limits(rdev); 213 bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw, 214 &rdev->qplib_ctx); 215 } 216 } 217 218 static void bnxt_re_shutdown(void *p) 219 { 220 struct bnxt_re_dev *rdev = p; 221 222 if (!rdev) 223 return; 224 225 bnxt_re_ib_unreg(rdev); 226 } 227 228 static void bnxt_re_stop_irq(void *handle) 229 { 230 struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle; 231 struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw; 232 struct bnxt_qplib_nq *nq; 233 int indx; 234 235 for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) { 236 nq = &rdev->nq[indx - 1]; 237 bnxt_qplib_nq_stop_irq(nq, false); 238 } 239 240 bnxt_qplib_rcfw_stop_irq(rcfw, false); 241 } 242 243 static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent) 244 { 245 struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle; 246 struct bnxt_msix_entry *msix_ent = rdev->msix_entries; 247 struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw; 248 struct bnxt_qplib_nq *nq; 249 int indx, rc; 250 251 if (!ent) { 252 /* Not setting the f/w timeout bit in rcfw. 253 * During the driver unload the first command 254 * to f/w will timeout and that will set the 255 * timeout bit. 256 */ 257 dev_err(rdev_to_dev(rdev), "Failed to re-start IRQs\n"); 258 return; 259 } 260 261 /* Vectors may change after restart, so update with new vectors 262 * in device sctructure. 263 */ 264 for (indx = 0; indx < rdev->num_msix; indx++) 265 rdev->msix_entries[indx].vector = ent[indx].vector; 266 267 bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector, 268 false); 269 for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) { 270 nq = &rdev->nq[indx - 1]; 271 rc = bnxt_qplib_nq_start_irq(nq, indx - 1, 272 msix_ent[indx].vector, false); 273 if (rc) 274 dev_warn(rdev_to_dev(rdev), 275 "Failed to reinit NQ index %d\n", indx - 1); 276 } 277 } 278 279 static struct bnxt_ulp_ops bnxt_re_ulp_ops = { 280 .ulp_async_notifier = NULL, 281 .ulp_stop = bnxt_re_stop, 282 .ulp_start = bnxt_re_start, 283 .ulp_sriov_config = bnxt_re_sriov_config, 284 .ulp_shutdown = bnxt_re_shutdown, 285 .ulp_irq_stop = bnxt_re_stop_irq, 286 .ulp_irq_restart = bnxt_re_start_irq 287 }; 288 289 /* RoCE -> Net driver */ 290 291 /* Driver registration routines used to let the networking driver (bnxt_en) 292 * to know that the RoCE driver is now installed 293 */ 294 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev) 295 { 296 struct bnxt_en_dev *en_dev; 297 int rc; 298 299 if (!rdev) 300 return -EINVAL; 301 302 en_dev = rdev->en_dev; 303 304 rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev, 305 BNXT_ROCE_ULP); 306 return rc; 307 } 308 309 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev) 310 { 311 struct bnxt_en_dev *en_dev; 312 int rc = 0; 313 314 if (!rdev) 315 return -EINVAL; 316 317 en_dev = rdev->en_dev; 318 319 rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP, 320 &bnxt_re_ulp_ops, rdev); 321 rdev->qplib_res.pdev = rdev->en_dev->pdev; 322 return rc; 323 } 324 325 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev) 326 { 327 struct bnxt_en_dev *en_dev; 328 int rc; 329 330 if (!rdev) 331 return -EINVAL; 332 333 en_dev = rdev->en_dev; 334 335 336 rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP); 337 338 return rc; 339 } 340 341 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev) 342 { 343 int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got; 344 struct bnxt_en_dev *en_dev; 345 346 if (!rdev) 347 return -EINVAL; 348 349 en_dev = rdev->en_dev; 350 351 num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus()); 352 353 num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP, 354 rdev->msix_entries, 355 num_msix_want); 356 if (num_msix_got < BNXT_RE_MIN_MSIX) { 357 rc = -EINVAL; 358 goto done; 359 } 360 if (num_msix_got != num_msix_want) { 361 dev_warn(rdev_to_dev(rdev), 362 "Requested %d MSI-X vectors, got %d\n", 363 num_msix_want, num_msix_got); 364 } 365 rdev->num_msix = num_msix_got; 366 done: 367 return rc; 368 } 369 370 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr, 371 u16 opcd, u16 crid, u16 trid) 372 { 373 hdr->req_type = cpu_to_le16(opcd); 374 hdr->cmpl_ring = cpu_to_le16(crid); 375 hdr->target_id = cpu_to_le16(trid); 376 } 377 378 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg, 379 int msg_len, void *resp, int resp_max_len, 380 int timeout) 381 { 382 fw_msg->msg = msg; 383 fw_msg->msg_len = msg_len; 384 fw_msg->resp = resp; 385 fw_msg->resp_max_len = resp_max_len; 386 fw_msg->timeout = timeout; 387 } 388 389 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, 390 u16 fw_ring_id, int type) 391 { 392 struct bnxt_en_dev *en_dev = rdev->en_dev; 393 struct hwrm_ring_free_input req = {0}; 394 struct hwrm_ring_free_output resp; 395 struct bnxt_fw_msg fw_msg; 396 int rc = -EINVAL; 397 398 if (!en_dev) 399 return rc; 400 401 memset(&fw_msg, 0, sizeof(fw_msg)); 402 403 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1); 404 req.ring_type = type; 405 req.ring_id = cpu_to_le16(fw_ring_id); 406 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 407 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 408 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 409 if (rc) 410 dev_err(rdev_to_dev(rdev), 411 "Failed to free HW ring:%d :%#x", req.ring_id, rc); 412 return rc; 413 } 414 415 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr, 416 int pages, int type, u32 ring_mask, 417 u32 map_index, u16 *fw_ring_id) 418 { 419 struct bnxt_en_dev *en_dev = rdev->en_dev; 420 struct hwrm_ring_alloc_input req = {0}; 421 struct hwrm_ring_alloc_output resp; 422 struct bnxt_fw_msg fw_msg; 423 int rc = -EINVAL; 424 425 if (!en_dev) 426 return rc; 427 428 memset(&fw_msg, 0, sizeof(fw_msg)); 429 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1); 430 req.enables = 0; 431 req.page_tbl_addr = cpu_to_le64(dma_arr[0]); 432 if (pages > 1) { 433 /* Page size is in log2 units */ 434 req.page_size = BNXT_PAGE_SHIFT; 435 req.page_tbl_depth = 1; 436 } 437 req.fbo = 0; 438 /* Association of ring index with doorbell index and MSIX number */ 439 req.logical_id = cpu_to_le16(map_index); 440 req.length = cpu_to_le32(ring_mask + 1); 441 req.ring_type = type; 442 req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX; 443 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 444 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 445 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 446 if (!rc) 447 *fw_ring_id = le16_to_cpu(resp.ring_id); 448 449 return rc; 450 } 451 452 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev, 453 u32 fw_stats_ctx_id) 454 { 455 struct bnxt_en_dev *en_dev = rdev->en_dev; 456 struct hwrm_stat_ctx_free_input req = {0}; 457 struct bnxt_fw_msg fw_msg; 458 int rc = -EINVAL; 459 460 if (!en_dev) 461 return rc; 462 463 memset(&fw_msg, 0, sizeof(fw_msg)); 464 465 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1); 466 req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id); 467 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req, 468 sizeof(req), DFLT_HWRM_CMD_TIMEOUT); 469 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 470 if (rc) 471 dev_err(rdev_to_dev(rdev), 472 "Failed to free HW stats context %#x", rc); 473 474 return rc; 475 } 476 477 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev, 478 dma_addr_t dma_map, 479 u32 *fw_stats_ctx_id) 480 { 481 struct hwrm_stat_ctx_alloc_output resp = {0}; 482 struct hwrm_stat_ctx_alloc_input req = {0}; 483 struct bnxt_en_dev *en_dev = rdev->en_dev; 484 struct bnxt_fw_msg fw_msg; 485 int rc = -EINVAL; 486 487 *fw_stats_ctx_id = INVALID_STATS_CTX_ID; 488 489 if (!en_dev) 490 return rc; 491 492 memset(&fw_msg, 0, sizeof(fw_msg)); 493 494 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1); 495 req.update_period_ms = cpu_to_le32(1000); 496 req.stats_dma_addr = cpu_to_le64(dma_map); 497 req.stats_dma_length = cpu_to_le16(sizeof(struct ctx_hw_stats_ext)); 498 req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE; 499 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 500 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 501 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 502 if (!rc) 503 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id); 504 505 return rc; 506 } 507 508 /* Device */ 509 510 static bool is_bnxt_re_dev(struct net_device *netdev) 511 { 512 struct ethtool_drvinfo drvinfo; 513 514 if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) { 515 memset(&drvinfo, 0, sizeof(drvinfo)); 516 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo); 517 518 if (strcmp(drvinfo.driver, "bnxt_en")) 519 return false; 520 return true; 521 } 522 return false; 523 } 524 525 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev) 526 { 527 struct bnxt_re_dev *rdev; 528 529 rcu_read_lock(); 530 list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) { 531 if (rdev->netdev == netdev) { 532 rcu_read_unlock(); 533 return rdev; 534 } 535 } 536 rcu_read_unlock(); 537 return NULL; 538 } 539 540 static void bnxt_re_dev_unprobe(struct net_device *netdev, 541 struct bnxt_en_dev *en_dev) 542 { 543 dev_put(netdev); 544 module_put(en_dev->pdev->driver->driver.owner); 545 } 546 547 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev) 548 { 549 struct bnxt *bp = netdev_priv(netdev); 550 struct bnxt_en_dev *en_dev; 551 struct pci_dev *pdev; 552 553 /* Call bnxt_en's RoCE probe via indirect API */ 554 if (!bp->ulp_probe) 555 return ERR_PTR(-EINVAL); 556 557 en_dev = bp->ulp_probe(netdev); 558 if (IS_ERR(en_dev)) 559 return en_dev; 560 561 pdev = en_dev->pdev; 562 if (!pdev) 563 return ERR_PTR(-EINVAL); 564 565 if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) { 566 dev_info(&pdev->dev, 567 "%s: probe error: RoCE is not supported on this device", 568 ROCE_DRV_MODULE_NAME); 569 return ERR_PTR(-ENODEV); 570 } 571 572 /* Bump net device reference count */ 573 if (!try_module_get(pdev->driver->driver.owner)) 574 return ERR_PTR(-ENODEV); 575 576 dev_hold(netdev); 577 578 return en_dev; 579 } 580 581 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr, 582 char *buf) 583 { 584 struct bnxt_re_dev *rdev = 585 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev); 586 587 return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor); 588 } 589 static DEVICE_ATTR_RO(hw_rev); 590 591 static ssize_t hca_type_show(struct device *device, 592 struct device_attribute *attr, char *buf) 593 { 594 struct bnxt_re_dev *rdev = 595 rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev); 596 597 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc); 598 } 599 static DEVICE_ATTR_RO(hca_type); 600 601 static struct attribute *bnxt_re_attributes[] = { 602 &dev_attr_hw_rev.attr, 603 &dev_attr_hca_type.attr, 604 NULL 605 }; 606 607 static const struct attribute_group bnxt_re_dev_attr_group = { 608 .attrs = bnxt_re_attributes, 609 }; 610 611 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev) 612 { 613 ib_unregister_device(&rdev->ibdev); 614 } 615 616 static const struct ib_device_ops bnxt_re_dev_ops = { 617 .owner = THIS_MODULE, 618 .driver_id = RDMA_DRIVER_BNXT_RE, 619 .uverbs_abi_ver = BNXT_RE_ABI_VERSION, 620 621 .add_gid = bnxt_re_add_gid, 622 .alloc_hw_stats = bnxt_re_ib_alloc_hw_stats, 623 .alloc_mr = bnxt_re_alloc_mr, 624 .alloc_pd = bnxt_re_alloc_pd, 625 .alloc_ucontext = bnxt_re_alloc_ucontext, 626 .create_ah = bnxt_re_create_ah, 627 .create_cq = bnxt_re_create_cq, 628 .create_qp = bnxt_re_create_qp, 629 .create_srq = bnxt_re_create_srq, 630 .dealloc_pd = bnxt_re_dealloc_pd, 631 .dealloc_ucontext = bnxt_re_dealloc_ucontext, 632 .del_gid = bnxt_re_del_gid, 633 .dereg_mr = bnxt_re_dereg_mr, 634 .destroy_ah = bnxt_re_destroy_ah, 635 .destroy_cq = bnxt_re_destroy_cq, 636 .destroy_qp = bnxt_re_destroy_qp, 637 .destroy_srq = bnxt_re_destroy_srq, 638 .get_dev_fw_str = bnxt_re_query_fw_str, 639 .get_dma_mr = bnxt_re_get_dma_mr, 640 .get_hw_stats = bnxt_re_ib_get_hw_stats, 641 .get_link_layer = bnxt_re_get_link_layer, 642 .get_port_immutable = bnxt_re_get_port_immutable, 643 .map_mr_sg = bnxt_re_map_mr_sg, 644 .mmap = bnxt_re_mmap, 645 .modify_ah = bnxt_re_modify_ah, 646 .modify_qp = bnxt_re_modify_qp, 647 .modify_srq = bnxt_re_modify_srq, 648 .poll_cq = bnxt_re_poll_cq, 649 .post_recv = bnxt_re_post_recv, 650 .post_send = bnxt_re_post_send, 651 .post_srq_recv = bnxt_re_post_srq_recv, 652 .query_ah = bnxt_re_query_ah, 653 .query_device = bnxt_re_query_device, 654 .query_pkey = bnxt_re_query_pkey, 655 .query_port = bnxt_re_query_port, 656 .query_qp = bnxt_re_query_qp, 657 .query_srq = bnxt_re_query_srq, 658 .reg_user_mr = bnxt_re_reg_user_mr, 659 .req_notify_cq = bnxt_re_req_notify_cq, 660 INIT_RDMA_OBJ_SIZE(ib_ah, bnxt_re_ah, ib_ah), 661 INIT_RDMA_OBJ_SIZE(ib_cq, bnxt_re_cq, ib_cq), 662 INIT_RDMA_OBJ_SIZE(ib_pd, bnxt_re_pd, ib_pd), 663 INIT_RDMA_OBJ_SIZE(ib_srq, bnxt_re_srq, ib_srq), 664 INIT_RDMA_OBJ_SIZE(ib_ucontext, bnxt_re_ucontext, ib_uctx), 665 }; 666 667 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev) 668 { 669 struct ib_device *ibdev = &rdev->ibdev; 670 int ret; 671 672 /* ib device init */ 673 ibdev->node_type = RDMA_NODE_IB_CA; 674 strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA", 675 strlen(BNXT_RE_DESC) + 5); 676 ibdev->phys_port_cnt = 1; 677 678 bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid); 679 680 ibdev->num_comp_vectors = rdev->num_msix - 1; 681 ibdev->dev.parent = &rdev->en_dev->pdev->dev; 682 ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY; 683 684 /* User space */ 685 ibdev->uverbs_cmd_mask = 686 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 687 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 688 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 689 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 690 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 691 (1ull << IB_USER_VERBS_CMD_REG_MR) | 692 (1ull << IB_USER_VERBS_CMD_REREG_MR) | 693 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 694 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 695 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 696 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | 697 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 698 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 699 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 700 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 701 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 702 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | 703 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | 704 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | 705 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | 706 (1ull << IB_USER_VERBS_CMD_CREATE_AH) | 707 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) | 708 (1ull << IB_USER_VERBS_CMD_QUERY_AH) | 709 (1ull << IB_USER_VERBS_CMD_DESTROY_AH); 710 /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */ 711 712 713 rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group); 714 ib_set_device_ops(ibdev, &bnxt_re_dev_ops); 715 ret = ib_device_set_netdev(&rdev->ibdev, rdev->netdev, 1); 716 if (ret) 717 return ret; 718 719 return ib_register_device(ibdev, "bnxt_re%d"); 720 } 721 722 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev) 723 { 724 dev_put(rdev->netdev); 725 rdev->netdev = NULL; 726 727 mutex_lock(&bnxt_re_dev_lock); 728 list_del_rcu(&rdev->list); 729 mutex_unlock(&bnxt_re_dev_lock); 730 731 synchronize_rcu(); 732 733 ib_dealloc_device(&rdev->ibdev); 734 /* rdev is gone */ 735 } 736 737 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev, 738 struct bnxt_en_dev *en_dev) 739 { 740 struct bnxt_re_dev *rdev; 741 742 /* Allocate bnxt_re_dev instance here */ 743 rdev = ib_alloc_device(bnxt_re_dev, ibdev); 744 if (!rdev) { 745 dev_err(NULL, "%s: bnxt_re_dev allocation failure!", 746 ROCE_DRV_MODULE_NAME); 747 return NULL; 748 } 749 /* Default values */ 750 rdev->netdev = netdev; 751 dev_hold(rdev->netdev); 752 rdev->en_dev = en_dev; 753 rdev->id = rdev->en_dev->pdev->devfn; 754 INIT_LIST_HEAD(&rdev->qp_list); 755 mutex_init(&rdev->qp_lock); 756 atomic_set(&rdev->qp_count, 0); 757 atomic_set(&rdev->cq_count, 0); 758 atomic_set(&rdev->srq_count, 0); 759 atomic_set(&rdev->mr_count, 0); 760 atomic_set(&rdev->mw_count, 0); 761 rdev->cosq[0] = 0xFFFF; 762 rdev->cosq[1] = 0xFFFF; 763 764 mutex_lock(&bnxt_re_dev_lock); 765 list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list); 766 mutex_unlock(&bnxt_re_dev_lock); 767 return rdev; 768 } 769 770 static int bnxt_re_handle_unaffi_async_event(struct creq_func_event 771 *unaffi_async) 772 { 773 switch (unaffi_async->event) { 774 case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR: 775 break; 776 case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR: 777 break; 778 case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR: 779 break; 780 case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR: 781 break; 782 case CREQ_FUNC_EVENT_EVENT_CQ_ERROR: 783 break; 784 case CREQ_FUNC_EVENT_EVENT_TQM_ERROR: 785 break; 786 case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR: 787 break; 788 case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR: 789 break; 790 case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR: 791 break; 792 case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR: 793 break; 794 case CREQ_FUNC_EVENT_EVENT_TIM_ERROR: 795 break; 796 default: 797 return -EINVAL; 798 } 799 return 0; 800 } 801 802 static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event, 803 struct bnxt_re_qp *qp) 804 { 805 struct ib_event event; 806 unsigned int flags; 807 808 if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) { 809 flags = bnxt_re_lock_cqs(qp); 810 bnxt_qplib_add_flush_qp(&qp->qplib_qp); 811 bnxt_re_unlock_cqs(qp, flags); 812 } 813 814 memset(&event, 0, sizeof(event)); 815 if (qp->qplib_qp.srq) { 816 event.device = &qp->rdev->ibdev; 817 event.element.qp = &qp->ib_qp; 818 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 819 } 820 821 if (event.device && qp->ib_qp.event_handler) 822 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context); 823 824 return 0; 825 } 826 827 static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async, 828 void *obj) 829 { 830 int rc = 0; 831 u8 event; 832 833 if (!obj) 834 return rc; /* QP was already dead, still return success */ 835 836 event = affi_async->event; 837 if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) { 838 struct bnxt_qplib_qp *lib_qp = obj; 839 struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp, 840 qplib_qp); 841 rc = bnxt_re_handle_qp_async_event(affi_async, qp); 842 } 843 return rc; 844 } 845 846 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw, 847 void *aeqe, void *obj) 848 { 849 struct creq_qp_event *affi_async; 850 struct creq_func_event *unaffi_async; 851 u8 type; 852 int rc; 853 854 type = ((struct creq_base *)aeqe)->type; 855 if (type == CREQ_BASE_TYPE_FUNC_EVENT) { 856 unaffi_async = aeqe; 857 rc = bnxt_re_handle_unaffi_async_event(unaffi_async); 858 } else { 859 affi_async = aeqe; 860 rc = bnxt_re_handle_affi_async_event(affi_async, obj); 861 } 862 863 return rc; 864 } 865 866 static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq, 867 struct bnxt_qplib_srq *handle, u8 event) 868 { 869 struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq, 870 qplib_srq); 871 struct ib_event ib_event; 872 int rc = 0; 873 874 if (!srq) { 875 dev_err(NULL, "%s: SRQ is NULL, SRQN not handled", 876 ROCE_DRV_MODULE_NAME); 877 rc = -EINVAL; 878 goto done; 879 } 880 ib_event.device = &srq->rdev->ibdev; 881 ib_event.element.srq = &srq->ib_srq; 882 if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT) 883 ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED; 884 else 885 ib_event.event = IB_EVENT_SRQ_ERR; 886 887 if (srq->ib_srq.event_handler) { 888 /* Lock event_handler? */ 889 (*srq->ib_srq.event_handler)(&ib_event, 890 srq->ib_srq.srq_context); 891 } 892 done: 893 return rc; 894 } 895 896 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq, 897 struct bnxt_qplib_cq *handle) 898 { 899 struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq, 900 qplib_cq); 901 902 if (!cq) { 903 dev_err(NULL, "%s: CQ is NULL, CQN not handled", 904 ROCE_DRV_MODULE_NAME); 905 return -EINVAL; 906 } 907 if (cq->ib_cq.comp_handler) { 908 /* Lock comp_handler? */ 909 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context); 910 } 911 912 return 0; 913 } 914 915 #define BNXT_RE_GEN_P5_PF_NQ_DB 0x10000 916 #define BNXT_RE_GEN_P5_VF_NQ_DB 0x4000 917 static u32 bnxt_re_get_nqdb_offset(struct bnxt_re_dev *rdev, u16 indx) 918 { 919 return bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx) ? 920 (rdev->is_virtfn ? BNXT_RE_GEN_P5_VF_NQ_DB : 921 BNXT_RE_GEN_P5_PF_NQ_DB) : 922 rdev->msix_entries[indx].db_offset; 923 } 924 925 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev) 926 { 927 int i; 928 929 for (i = 1; i < rdev->num_msix; i++) 930 bnxt_qplib_disable_nq(&rdev->nq[i - 1]); 931 932 if (rdev->qplib_res.rcfw) 933 bnxt_qplib_cleanup_res(&rdev->qplib_res); 934 } 935 936 static int bnxt_re_init_res(struct bnxt_re_dev *rdev) 937 { 938 int num_vec_enabled = 0; 939 int rc = 0, i; 940 u32 db_offt; 941 942 bnxt_qplib_init_res(&rdev->qplib_res); 943 944 for (i = 1; i < rdev->num_msix ; i++) { 945 db_offt = bnxt_re_get_nqdb_offset(rdev, i); 946 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1], 947 i - 1, rdev->msix_entries[i].vector, 948 db_offt, &bnxt_re_cqn_handler, 949 &bnxt_re_srqn_handler); 950 if (rc) { 951 dev_err(rdev_to_dev(rdev), 952 "Failed to enable NQ with rc = 0x%x", rc); 953 goto fail; 954 } 955 num_vec_enabled++; 956 } 957 return 0; 958 fail: 959 for (i = num_vec_enabled; i >= 0; i--) 960 bnxt_qplib_disable_nq(&rdev->nq[i]); 961 return rc; 962 } 963 964 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev) 965 { 966 u8 type; 967 int i; 968 969 for (i = 0; i < rdev->num_msix - 1; i++) { 970 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 971 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type); 972 rdev->nq[i].res = NULL; 973 bnxt_qplib_free_nq(&rdev->nq[i]); 974 } 975 } 976 977 static void bnxt_re_free_res(struct bnxt_re_dev *rdev) 978 { 979 bnxt_re_free_nq_res(rdev); 980 981 if (rdev->qplib_res.dpi_tbl.max) { 982 bnxt_qplib_dealloc_dpi(&rdev->qplib_res, 983 &rdev->qplib_res.dpi_tbl, 984 &rdev->dpi_privileged); 985 } 986 if (rdev->qplib_res.rcfw) { 987 bnxt_qplib_free_res(&rdev->qplib_res); 988 rdev->qplib_res.rcfw = NULL; 989 } 990 } 991 992 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev) 993 { 994 int num_vec_created = 0; 995 dma_addr_t *pg_map; 996 int rc = 0, i; 997 int pages; 998 u8 type; 999 1000 /* Configure and allocate resources for qplib */ 1001 rdev->qplib_res.rcfw = &rdev->rcfw; 1002 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr, 1003 rdev->is_virtfn); 1004 if (rc) 1005 goto fail; 1006 1007 rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev, 1008 rdev->netdev, &rdev->dev_attr); 1009 if (rc) 1010 goto fail; 1011 1012 rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl, 1013 &rdev->dpi_privileged, 1014 rdev); 1015 if (rc) 1016 goto dealloc_res; 1017 1018 for (i = 0; i < rdev->num_msix - 1; i++) { 1019 rdev->nq[i].res = &rdev->qplib_res; 1020 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT + 1021 BNXT_RE_MAX_SRQC_COUNT + 2; 1022 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]); 1023 if (rc) { 1024 dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x", 1025 i, rc); 1026 goto free_nq; 1027 } 1028 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1029 pg_map = rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr; 1030 pages = rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count; 1031 rc = bnxt_re_net_ring_alloc(rdev, pg_map, pages, type, 1032 BNXT_QPLIB_NQE_MAX_CNT - 1, 1033 rdev->msix_entries[i + 1].ring_idx, 1034 &rdev->nq[i].ring_id); 1035 if (rc) { 1036 dev_err(rdev_to_dev(rdev), 1037 "Failed to allocate NQ fw id with rc = 0x%x", 1038 rc); 1039 bnxt_qplib_free_nq(&rdev->nq[i]); 1040 goto free_nq; 1041 } 1042 num_vec_created++; 1043 } 1044 return 0; 1045 free_nq: 1046 for (i = num_vec_created; i >= 0; i--) { 1047 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1048 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type); 1049 bnxt_qplib_free_nq(&rdev->nq[i]); 1050 } 1051 bnxt_qplib_dealloc_dpi(&rdev->qplib_res, 1052 &rdev->qplib_res.dpi_tbl, 1053 &rdev->dpi_privileged); 1054 dealloc_res: 1055 bnxt_qplib_free_res(&rdev->qplib_res); 1056 1057 fail: 1058 rdev->qplib_res.rcfw = NULL; 1059 return rc; 1060 } 1061 1062 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp, 1063 u8 port_num, enum ib_event_type event) 1064 { 1065 struct ib_event ib_event; 1066 1067 ib_event.device = ibdev; 1068 if (qp) { 1069 ib_event.element.qp = qp; 1070 ib_event.event = event; 1071 if (qp->event_handler) 1072 qp->event_handler(&ib_event, qp->qp_context); 1073 1074 } else { 1075 ib_event.element.port_num = port_num; 1076 ib_event.event = event; 1077 ib_dispatch_event(&ib_event); 1078 } 1079 } 1080 1081 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN 0x02 1082 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir, 1083 u64 *cid_map) 1084 { 1085 struct hwrm_queue_pri2cos_qcfg_input req = {0}; 1086 struct bnxt *bp = netdev_priv(rdev->netdev); 1087 struct hwrm_queue_pri2cos_qcfg_output resp; 1088 struct bnxt_en_dev *en_dev = rdev->en_dev; 1089 struct bnxt_fw_msg fw_msg; 1090 u32 flags = 0; 1091 u8 *qcfgmap, *tmp_map; 1092 int rc = 0, i; 1093 1094 if (!cid_map) 1095 return -EINVAL; 1096 1097 memset(&fw_msg, 0, sizeof(fw_msg)); 1098 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, 1099 HWRM_QUEUE_PRI2COS_QCFG, -1, -1); 1100 flags |= (dir & 0x01); 1101 flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN; 1102 req.flags = cpu_to_le32(flags); 1103 req.port_id = bp->pf.port_id; 1104 1105 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 1106 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 1107 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 1108 if (rc) 1109 return rc; 1110 1111 if (resp.queue_cfg_info) { 1112 dev_warn(rdev_to_dev(rdev), 1113 "Asymmetric cos queue configuration detected"); 1114 dev_warn(rdev_to_dev(rdev), 1115 " on device, QoS may not be fully functional\n"); 1116 } 1117 qcfgmap = &resp.pri0_cos_queue_id; 1118 tmp_map = (u8 *)cid_map; 1119 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) 1120 tmp_map[i] = qcfgmap[i]; 1121 1122 return rc; 1123 } 1124 1125 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev, 1126 struct bnxt_re_qp *qp) 1127 { 1128 return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp); 1129 } 1130 1131 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev) 1132 { 1133 int mask = IB_QP_STATE; 1134 struct ib_qp_attr qp_attr; 1135 struct bnxt_re_qp *qp; 1136 1137 qp_attr.qp_state = IB_QPS_ERR; 1138 mutex_lock(&rdev->qp_lock); 1139 list_for_each_entry(qp, &rdev->qp_list, list) { 1140 /* Modify the state of all QPs except QP1/Shadow QP */ 1141 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) { 1142 if (qp->qplib_qp.state != 1143 CMDQ_MODIFY_QP_NEW_STATE_RESET && 1144 qp->qplib_qp.state != 1145 CMDQ_MODIFY_QP_NEW_STATE_ERR) { 1146 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp, 1147 1, IB_EVENT_QP_FATAL); 1148 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask, 1149 NULL); 1150 } 1151 } 1152 } 1153 mutex_unlock(&rdev->qp_lock); 1154 } 1155 1156 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev) 1157 { 1158 struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl; 1159 struct bnxt_qplib_gid gid; 1160 u16 gid_idx, index; 1161 int rc = 0; 1162 1163 if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) 1164 return 0; 1165 1166 if (!sgid_tbl) { 1167 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated"); 1168 return -EINVAL; 1169 } 1170 1171 for (index = 0; index < sgid_tbl->active; index++) { 1172 gid_idx = sgid_tbl->hw_id[index]; 1173 1174 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero, 1175 sizeof(bnxt_qplib_gid_zero))) 1176 continue; 1177 /* need to modify the VLAN enable setting of non VLAN GID only 1178 * as setting is done for VLAN GID while adding GID 1179 */ 1180 if (sgid_tbl->vlan[index]) 1181 continue; 1182 1183 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid)); 1184 1185 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx, 1186 rdev->qplib_res.netdev->dev_addr); 1187 } 1188 1189 return rc; 1190 } 1191 1192 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev) 1193 { 1194 u32 prio_map = 0, tmp_map = 0; 1195 struct net_device *netdev; 1196 struct dcb_app app; 1197 1198 netdev = rdev->netdev; 1199 1200 memset(&app, 0, sizeof(app)); 1201 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 1202 app.protocol = ETH_P_IBOE; 1203 tmp_map = dcb_ieee_getapp_mask(netdev, &app); 1204 prio_map = tmp_map; 1205 1206 app.selector = IEEE_8021QAZ_APP_SEL_DGRAM; 1207 app.protocol = ROCE_V2_UDP_DPORT; 1208 tmp_map = dcb_ieee_getapp_mask(netdev, &app); 1209 prio_map |= tmp_map; 1210 1211 return prio_map; 1212 } 1213 1214 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq) 1215 { 1216 u16 prio; 1217 u8 id; 1218 1219 for (prio = 0, id = 0; prio < 8; prio++) { 1220 if (prio_map & (1 << prio)) { 1221 cosq[id] = cid_map[prio]; 1222 id++; 1223 if (id == 2) /* Max 2 tcs supported */ 1224 break; 1225 } 1226 } 1227 } 1228 1229 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev) 1230 { 1231 u8 prio_map = 0; 1232 u64 cid_map; 1233 int rc; 1234 1235 /* Get priority for roce */ 1236 prio_map = bnxt_re_get_priority_mask(rdev); 1237 1238 if (prio_map == rdev->cur_prio_map) 1239 return 0; 1240 rdev->cur_prio_map = prio_map; 1241 /* Get cosq id for this priority */ 1242 rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map); 1243 if (rc) { 1244 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map); 1245 return rc; 1246 } 1247 /* Parse CoS IDs for app priority */ 1248 bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq); 1249 1250 /* Config BONO. */ 1251 rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq); 1252 if (rc) { 1253 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n", 1254 rdev->cosq[0], rdev->cosq[1]); 1255 return rc; 1256 } 1257 1258 /* Actual priorities are not programmed as they are already 1259 * done by L2 driver; just enable or disable priority vlan tagging 1260 */ 1261 if ((prio_map == 0 && rdev->qplib_res.prio) || 1262 (prio_map != 0 && !rdev->qplib_res.prio)) { 1263 rdev->qplib_res.prio = prio_map ? true : false; 1264 1265 bnxt_re_update_gid(rdev); 1266 } 1267 1268 return 0; 1269 } 1270 1271 static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev) 1272 { 1273 struct bnxt_en_dev *en_dev = rdev->en_dev; 1274 struct hwrm_ver_get_output resp = {0}; 1275 struct hwrm_ver_get_input req = {0}; 1276 struct bnxt_fw_msg fw_msg; 1277 int rc = 0; 1278 1279 memset(&fw_msg, 0, sizeof(fw_msg)); 1280 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, 1281 HWRM_VER_GET, -1, -1); 1282 req.hwrm_intf_maj = HWRM_VERSION_MAJOR; 1283 req.hwrm_intf_min = HWRM_VERSION_MINOR; 1284 req.hwrm_intf_upd = HWRM_VERSION_UPDATE; 1285 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, 1286 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); 1287 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg); 1288 if (rc) { 1289 dev_err(rdev_to_dev(rdev), 1290 "Failed to query HW version, rc = 0x%x", rc); 1291 return; 1292 } 1293 rdev->qplib_ctx.hwrm_intf_ver = 1294 (u64)le16_to_cpu(resp.hwrm_intf_major) << 48 | 1295 (u64)le16_to_cpu(resp.hwrm_intf_minor) << 32 | 1296 (u64)le16_to_cpu(resp.hwrm_intf_build) << 16 | 1297 le16_to_cpu(resp.hwrm_intf_patch); 1298 } 1299 1300 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev) 1301 { 1302 u8 type; 1303 int rc; 1304 1305 if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) { 1306 /* Cleanup ib dev */ 1307 bnxt_re_unregister_ib(rdev); 1308 } 1309 if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags)) 1310 cancel_delayed_work_sync(&rdev->worker); 1311 1312 if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, 1313 &rdev->flags)) 1314 bnxt_re_cleanup_res(rdev); 1315 if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags)) 1316 bnxt_re_free_res(rdev); 1317 1318 if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) { 1319 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw); 1320 if (rc) 1321 dev_warn(rdev_to_dev(rdev), 1322 "Failed to deinitialize RCFW: %#x", rc); 1323 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id); 1324 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx); 1325 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw); 1326 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1327 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, type); 1328 bnxt_qplib_free_rcfw_channel(&rdev->rcfw); 1329 } 1330 if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) { 1331 rc = bnxt_re_free_msix(rdev); 1332 if (rc) 1333 dev_warn(rdev_to_dev(rdev), 1334 "Failed to free MSI-X vectors: %#x", rc); 1335 } 1336 1337 bnxt_re_destroy_chip_ctx(rdev); 1338 if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) { 1339 rc = bnxt_re_unregister_netdev(rdev); 1340 if (rc) 1341 dev_warn(rdev_to_dev(rdev), 1342 "Failed to unregister with netdev: %#x", rc); 1343 } 1344 } 1345 1346 /* worker thread for polling periodic events. Now used for QoS programming*/ 1347 static void bnxt_re_worker(struct work_struct *work) 1348 { 1349 struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev, 1350 worker.work); 1351 1352 bnxt_re_setup_qos(rdev); 1353 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000)); 1354 } 1355 1356 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev) 1357 { 1358 dma_addr_t *pg_map; 1359 u32 db_offt, ridx; 1360 int pages, vid; 1361 bool locked; 1362 u8 type; 1363 int rc; 1364 1365 /* Acquire rtnl lock through out this function */ 1366 rtnl_lock(); 1367 locked = true; 1368 1369 /* Registered a new RoCE device instance to netdev */ 1370 rc = bnxt_re_register_netdev(rdev); 1371 if (rc) { 1372 rtnl_unlock(); 1373 pr_err("Failed to register with netedev: %#x\n", rc); 1374 return -EINVAL; 1375 } 1376 set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags); 1377 1378 rc = bnxt_re_setup_chip_ctx(rdev); 1379 if (rc) { 1380 dev_err(rdev_to_dev(rdev), "Failed to get chip context\n"); 1381 return -EINVAL; 1382 } 1383 1384 /* Check whether VF or PF */ 1385 bnxt_re_get_sriov_func_type(rdev); 1386 1387 rc = bnxt_re_request_msix(rdev); 1388 if (rc) { 1389 pr_err("Failed to get MSI-X vectors: %#x\n", rc); 1390 rc = -EINVAL; 1391 goto fail; 1392 } 1393 set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags); 1394 1395 bnxt_re_query_hwrm_intf_version(rdev); 1396 1397 /* Establish RCFW Communication Channel to initialize the context 1398 * memory for the function and all child VFs 1399 */ 1400 rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw, 1401 &rdev->qplib_ctx, 1402 BNXT_RE_MAX_QPC_COUNT); 1403 if (rc) { 1404 pr_err("Failed to allocate RCFW Channel: %#x\n", rc); 1405 goto fail; 1406 } 1407 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1408 pg_map = rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr; 1409 pages = rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count; 1410 ridx = rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx; 1411 rc = bnxt_re_net_ring_alloc(rdev, pg_map, pages, type, 1412 BNXT_QPLIB_CREQE_MAX_CNT - 1, 1413 ridx, &rdev->rcfw.creq_ring_id); 1414 if (rc) { 1415 pr_err("Failed to allocate CREQ: %#x\n", rc); 1416 goto free_rcfw; 1417 } 1418 db_offt = bnxt_re_get_nqdb_offset(rdev, BNXT_RE_AEQ_IDX); 1419 vid = rdev->msix_entries[BNXT_RE_AEQ_IDX].vector; 1420 rc = bnxt_qplib_enable_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw, 1421 vid, db_offt, rdev->is_virtfn, 1422 &bnxt_re_aeq_handler); 1423 if (rc) { 1424 pr_err("Failed to enable RCFW channel: %#x\n", rc); 1425 goto free_ring; 1426 } 1427 1428 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr, 1429 rdev->is_virtfn); 1430 if (rc) 1431 goto disable_rcfw; 1432 1433 bnxt_re_set_resource_limits(rdev); 1434 1435 rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0, 1436 bnxt_qplib_is_chip_gen_p5(&rdev->chip_ctx)); 1437 if (rc) { 1438 pr_err("Failed to allocate QPLIB context: %#x\n", rc); 1439 goto disable_rcfw; 1440 } 1441 rc = bnxt_re_net_stats_ctx_alloc(rdev, 1442 rdev->qplib_ctx.stats.dma_map, 1443 &rdev->qplib_ctx.stats.fw_id); 1444 if (rc) { 1445 pr_err("Failed to allocate stats context: %#x\n", rc); 1446 goto free_ctx; 1447 } 1448 1449 rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 1450 rdev->is_virtfn); 1451 if (rc) { 1452 pr_err("Failed to initialize RCFW: %#x\n", rc); 1453 goto free_sctx; 1454 } 1455 set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags); 1456 1457 /* Resources based on the 'new' device caps */ 1458 rc = bnxt_re_alloc_res(rdev); 1459 if (rc) { 1460 pr_err("Failed to allocate resources: %#x\n", rc); 1461 goto fail; 1462 } 1463 set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags); 1464 rc = bnxt_re_init_res(rdev); 1465 if (rc) { 1466 pr_err("Failed to initialize resources: %#x\n", rc); 1467 goto fail; 1468 } 1469 1470 set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags); 1471 1472 if (!rdev->is_virtfn) { 1473 rc = bnxt_re_setup_qos(rdev); 1474 if (rc) 1475 pr_info("RoCE priority not yet configured\n"); 1476 1477 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker); 1478 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags); 1479 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000)); 1480 } 1481 1482 rtnl_unlock(); 1483 locked = false; 1484 1485 /* Register ib dev */ 1486 rc = bnxt_re_register_ib(rdev); 1487 if (rc) { 1488 pr_err("Failed to register with IB: %#x\n", rc); 1489 goto fail; 1490 } 1491 set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags); 1492 dev_info(rdev_to_dev(rdev), "Device registered successfully"); 1493 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed, 1494 &rdev->active_width); 1495 set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags); 1496 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE); 1497 1498 return 0; 1499 free_sctx: 1500 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id); 1501 free_ctx: 1502 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx); 1503 disable_rcfw: 1504 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw); 1505 free_ring: 1506 type = bnxt_qplib_get_ring_type(&rdev->chip_ctx); 1507 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, type); 1508 free_rcfw: 1509 bnxt_qplib_free_rcfw_channel(&rdev->rcfw); 1510 fail: 1511 if (!locked) 1512 rtnl_lock(); 1513 bnxt_re_ib_unreg(rdev); 1514 rtnl_unlock(); 1515 1516 return rc; 1517 } 1518 1519 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev) 1520 { 1521 struct bnxt_en_dev *en_dev = rdev->en_dev; 1522 struct net_device *netdev = rdev->netdev; 1523 1524 bnxt_re_dev_remove(rdev); 1525 1526 if (netdev) 1527 bnxt_re_dev_unprobe(netdev, en_dev); 1528 } 1529 1530 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev) 1531 { 1532 struct bnxt_en_dev *en_dev; 1533 int rc = 0; 1534 1535 if (!is_bnxt_re_dev(netdev)) 1536 return -ENODEV; 1537 1538 en_dev = bnxt_re_dev_probe(netdev); 1539 if (IS_ERR(en_dev)) { 1540 if (en_dev != ERR_PTR(-ENODEV)) 1541 pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME); 1542 rc = PTR_ERR(en_dev); 1543 goto exit; 1544 } 1545 *rdev = bnxt_re_dev_add(netdev, en_dev); 1546 if (!*rdev) { 1547 rc = -ENOMEM; 1548 bnxt_re_dev_unprobe(netdev, en_dev); 1549 goto exit; 1550 } 1551 exit: 1552 return rc; 1553 } 1554 1555 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev) 1556 { 1557 pci_dev_put(rdev->en_dev->pdev); 1558 } 1559 1560 /* Handle all deferred netevents tasks */ 1561 static void bnxt_re_task(struct work_struct *work) 1562 { 1563 struct bnxt_re_work *re_work; 1564 struct bnxt_re_dev *rdev; 1565 int rc = 0; 1566 1567 re_work = container_of(work, struct bnxt_re_work, work); 1568 rdev = re_work->rdev; 1569 1570 if (re_work->event != NETDEV_REGISTER && 1571 !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) 1572 return; 1573 1574 switch (re_work->event) { 1575 case NETDEV_REGISTER: 1576 rc = bnxt_re_ib_reg(rdev); 1577 if (rc) { 1578 dev_err(rdev_to_dev(rdev), 1579 "Failed to register with IB: %#x", rc); 1580 bnxt_re_remove_one(rdev); 1581 bnxt_re_dev_unreg(rdev); 1582 goto exit; 1583 } 1584 break; 1585 case NETDEV_UP: 1586 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, 1587 IB_EVENT_PORT_ACTIVE); 1588 break; 1589 case NETDEV_DOWN: 1590 bnxt_re_dev_stop(rdev); 1591 break; 1592 case NETDEV_CHANGE: 1593 if (!netif_carrier_ok(rdev->netdev)) 1594 bnxt_re_dev_stop(rdev); 1595 else if (netif_carrier_ok(rdev->netdev)) 1596 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, 1597 IB_EVENT_PORT_ACTIVE); 1598 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed, 1599 &rdev->active_width); 1600 break; 1601 default: 1602 break; 1603 } 1604 smp_mb__before_atomic(); 1605 atomic_dec(&rdev->sched_count); 1606 exit: 1607 kfree(re_work); 1608 } 1609 1610 static void bnxt_re_init_one(struct bnxt_re_dev *rdev) 1611 { 1612 pci_dev_get(rdev->en_dev->pdev); 1613 } 1614 1615 /* 1616 * "Notifier chain callback can be invoked for the same chain from 1617 * different CPUs at the same time". 1618 * 1619 * For cases when the netdev is already present, our call to the 1620 * register_netdevice_notifier() will actually get the rtnl_lock() 1621 * before sending NETDEV_REGISTER and (if up) NETDEV_UP 1622 * events. 1623 * 1624 * But for cases when the netdev is not already present, the notifier 1625 * chain is subjected to be invoked from different CPUs simultaneously. 1626 * 1627 * This is protected by the netdev_mutex. 1628 */ 1629 static int bnxt_re_netdev_event(struct notifier_block *notifier, 1630 unsigned long event, void *ptr) 1631 { 1632 struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr); 1633 struct bnxt_re_work *re_work; 1634 struct bnxt_re_dev *rdev; 1635 int rc = 0; 1636 bool sch_work = false; 1637 1638 real_dev = rdma_vlan_dev_real_dev(netdev); 1639 if (!real_dev) 1640 real_dev = netdev; 1641 1642 rdev = bnxt_re_from_netdev(real_dev); 1643 if (!rdev && event != NETDEV_REGISTER) 1644 goto exit; 1645 if (real_dev != netdev) 1646 goto exit; 1647 1648 switch (event) { 1649 case NETDEV_REGISTER: 1650 if (rdev) 1651 break; 1652 rc = bnxt_re_dev_reg(&rdev, real_dev); 1653 if (rc == -ENODEV) 1654 break; 1655 if (rc) { 1656 pr_err("Failed to register with the device %s: %#x\n", 1657 real_dev->name, rc); 1658 break; 1659 } 1660 bnxt_re_init_one(rdev); 1661 sch_work = true; 1662 break; 1663 1664 case NETDEV_UNREGISTER: 1665 /* netdev notifier will call NETDEV_UNREGISTER again later since 1666 * we are still holding the reference to the netdev 1667 */ 1668 if (atomic_read(&rdev->sched_count) > 0) 1669 goto exit; 1670 bnxt_re_ib_unreg(rdev); 1671 bnxt_re_remove_one(rdev); 1672 bnxt_re_dev_unreg(rdev); 1673 break; 1674 1675 default: 1676 sch_work = true; 1677 break; 1678 } 1679 if (sch_work) { 1680 /* Allocate for the deferred task */ 1681 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC); 1682 if (re_work) { 1683 re_work->rdev = rdev; 1684 re_work->event = event; 1685 re_work->vlan_dev = (real_dev == netdev ? 1686 NULL : netdev); 1687 INIT_WORK(&re_work->work, bnxt_re_task); 1688 atomic_inc(&rdev->sched_count); 1689 queue_work(bnxt_re_wq, &re_work->work); 1690 } 1691 } 1692 1693 exit: 1694 return NOTIFY_DONE; 1695 } 1696 1697 static struct notifier_block bnxt_re_netdev_notifier = { 1698 .notifier_call = bnxt_re_netdev_event 1699 }; 1700 1701 static int __init bnxt_re_mod_init(void) 1702 { 1703 int rc = 0; 1704 1705 pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version); 1706 1707 bnxt_re_wq = create_singlethread_workqueue("bnxt_re"); 1708 if (!bnxt_re_wq) 1709 return -ENOMEM; 1710 1711 INIT_LIST_HEAD(&bnxt_re_dev_list); 1712 1713 rc = register_netdevice_notifier(&bnxt_re_netdev_notifier); 1714 if (rc) { 1715 pr_err("%s: Cannot register to netdevice_notifier", 1716 ROCE_DRV_MODULE_NAME); 1717 goto err_netdev; 1718 } 1719 return 0; 1720 1721 err_netdev: 1722 destroy_workqueue(bnxt_re_wq); 1723 1724 return rc; 1725 } 1726 1727 static void __exit bnxt_re_mod_exit(void) 1728 { 1729 struct bnxt_re_dev *rdev, *next; 1730 LIST_HEAD(to_be_deleted); 1731 1732 mutex_lock(&bnxt_re_dev_lock); 1733 /* Free all adapter allocated resources */ 1734 if (!list_empty(&bnxt_re_dev_list)) 1735 list_splice_init(&bnxt_re_dev_list, &to_be_deleted); 1736 mutex_unlock(&bnxt_re_dev_lock); 1737 /* 1738 * Cleanup the devices in reverse order so that the VF device 1739 * cleanup is done before PF cleanup 1740 */ 1741 list_for_each_entry_safe_reverse(rdev, next, &to_be_deleted, list) { 1742 dev_info(rdev_to_dev(rdev), "Unregistering Device"); 1743 /* 1744 * Flush out any scheduled tasks before destroying the 1745 * resources 1746 */ 1747 flush_workqueue(bnxt_re_wq); 1748 bnxt_re_dev_stop(rdev); 1749 /* Acquire the rtnl_lock as the L2 resources are freed here */ 1750 rtnl_lock(); 1751 bnxt_re_ib_unreg(rdev); 1752 rtnl_unlock(); 1753 bnxt_re_remove_one(rdev); 1754 bnxt_re_dev_unreg(rdev); 1755 } 1756 unregister_netdevice_notifier(&bnxt_re_netdev_notifier); 1757 if (bnxt_re_wq) 1758 destroy_workqueue(bnxt_re_wq); 1759 } 1760 1761 module_init(bnxt_re_mod_init); 1762 module_exit(bnxt_re_mod_exit); 1763