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#include <linux/auxiliary_bus.h>
  52
  53#include <rdma/ib_verbs.h>
  54#include <rdma/ib_user_verbs.h>
  55#include <rdma/ib_umem.h>
  56#include <rdma/ib_addr.h>
  57#include <linux/hashtable.h>
  58
  59#include "bnxt_ulp.h"
  60#include "roce_hsi.h"
  61#include "qplib_res.h"
  62#include "qplib_sp.h"
  63#include "qplib_fp.h"
  64#include "qplib_rcfw.h"
  65#include "bnxt_re.h"
  66#include "ib_verbs.h"
  67#include <rdma/bnxt_re-abi.h>
  68#include "bnxt.h"
  69#include "hw_counters.h"
  70
  71static char version[] =
  72		BNXT_RE_DESC "\n";
  73
  74MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>");
  75MODULE_DESCRIPTION(BNXT_RE_DESC);
  76MODULE_LICENSE("Dual BSD/GPL");
  77
  78/* globals */
  79static DEFINE_MUTEX(bnxt_re_mutex);
  80
 
 
 
 
  81static void bnxt_re_stop_irq(void *handle);
  82static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev);
  83static int bnxt_re_netdev_event(struct notifier_block *notifier,
  84				unsigned long event, void *ptr);
  85static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev);
  86static void bnxt_re_dev_uninit(struct bnxt_re_dev *rdev);
  87static int bnxt_re_hwrm_qcaps(struct bnxt_re_dev *rdev);
  88
  89static int bnxt_re_hwrm_qcfg(struct bnxt_re_dev *rdev, u32 *db_len,
  90			     u32 *offset);
  91static void bnxt_re_set_db_offset(struct bnxt_re_dev *rdev)
  92{
  93	struct bnxt_qplib_chip_ctx *cctx;
  94	struct bnxt_en_dev *en_dev;
  95	struct bnxt_qplib_res *res;
  96	u32 l2db_len = 0;
  97	u32 offset = 0;
  98	u32 barlen;
  99	int rc;
 100
 101	res = &rdev->qplib_res;
 102	en_dev = rdev->en_dev;
 103	cctx = rdev->chip_ctx;
 104
 105	/* Issue qcfg */
 106	rc = bnxt_re_hwrm_qcfg(rdev, &l2db_len, &offset);
 107	if (rc)
 108		dev_info(rdev_to_dev(rdev),
 109			 "Couldn't get DB bar size, Low latency framework is disabled\n");
 110	/* set register offsets for both UC and WC */
 111	if (bnxt_qplib_is_chip_gen_p7(cctx)) {
 112		res->dpi_tbl.ucreg.offset = offset;
 113		res->dpi_tbl.wcreg.offset = en_dev->l2_db_size;
 114	} else {
 115		res->dpi_tbl.ucreg.offset = res->is_vf ? BNXT_QPLIB_DBR_VF_DB_OFFSET :
 116							 BNXT_QPLIB_DBR_PF_DB_OFFSET;
 117		res->dpi_tbl.wcreg.offset = res->dpi_tbl.ucreg.offset;
 118	}
 119
 120	/* If WC mapping is disabled by L2 driver then en_dev->l2_db_size
 121	 * is equal to the DB-Bar actual size. This indicates that L2
 122	 * is mapping entire bar as UC-. RoCE driver can't enable WC mapping
 123	 * in such cases and DB-push will be disabled.
 124	 */
 125	barlen = pci_resource_len(res->pdev, RCFW_DBR_PCI_BAR_REGION);
 126	if (cctx->modes.db_push && l2db_len && en_dev->l2_db_size != barlen) {
 127		res->dpi_tbl.wcreg.offset = en_dev->l2_db_size;
 128		dev_info(rdev_to_dev(rdev),  "Low latency framework is enabled\n");
 129	}
 130}
 131
 132static void bnxt_re_set_drv_mode(struct bnxt_re_dev *rdev, u8 mode)
 133{
 134	struct bnxt_qplib_chip_ctx *cctx;
 135
 136	cctx = rdev->chip_ctx;
 137	cctx->modes.wqe_mode = bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx) ?
 138			       mode : BNXT_QPLIB_WQE_MODE_STATIC;
 139	if (bnxt_re_hwrm_qcaps(rdev))
 140		dev_err(rdev_to_dev(rdev),
 141			"Failed to query hwrm qcaps\n");
 142	if (bnxt_qplib_is_chip_gen_p7(rdev->chip_ctx))
 143		cctx->modes.toggle_bits |= BNXT_QPLIB_CQ_TOGGLE_BIT;
 144}
 145
 146static void bnxt_re_destroy_chip_ctx(struct bnxt_re_dev *rdev)
 147{
 148	struct bnxt_qplib_chip_ctx *chip_ctx;
 149
 150	if (!rdev->chip_ctx)
 151		return;
 152	chip_ctx = rdev->chip_ctx;
 153	rdev->chip_ctx = NULL;
 154	rdev->rcfw.res = NULL;
 155	rdev->qplib_res.cctx = NULL;
 156	rdev->qplib_res.pdev = NULL;
 157	rdev->qplib_res.netdev = NULL;
 158	kfree(chip_ctx);
 159}
 160
 161static int bnxt_re_setup_chip_ctx(struct bnxt_re_dev *rdev, u8 wqe_mode)
 162{
 163	struct bnxt_qplib_chip_ctx *chip_ctx;
 164	struct bnxt_en_dev *en_dev;
 165	int rc;
 166
 167	en_dev = rdev->en_dev;
 
 168
 169	chip_ctx = kzalloc(sizeof(*chip_ctx), GFP_KERNEL);
 170	if (!chip_ctx)
 171		return -ENOMEM;
 172	chip_ctx->chip_num = en_dev->chip_num;
 173	chip_ctx->hw_stats_size = en_dev->hw_ring_stats_size;
 174
 175	rdev->chip_ctx = chip_ctx;
 176	/* rest members to follow eventually */
 177
 178	rdev->qplib_res.cctx = rdev->chip_ctx;
 179	rdev->rcfw.res = &rdev->qplib_res;
 180	rdev->qplib_res.dattr = &rdev->dev_attr;
 181	rdev->qplib_res.is_vf = BNXT_EN_VF(en_dev);
 182
 183	bnxt_re_set_drv_mode(rdev, wqe_mode);
 184
 185	bnxt_re_set_db_offset(rdev);
 186	rc = bnxt_qplib_map_db_bar(&rdev->qplib_res);
 187	if (rc)
 188		return rc;
 189
 190	if (bnxt_qplib_determine_atomics(en_dev->pdev))
 191		ibdev_info(&rdev->ibdev,
 192			   "platform doesn't support global atomics.");
 193	return 0;
 194}
 195
 196/* SR-IOV helper functions */
 197
 198static void bnxt_re_get_sriov_func_type(struct bnxt_re_dev *rdev)
 199{
 200	if (BNXT_EN_VF(rdev->en_dev))
 
 
 
 201		rdev->is_virtfn = 1;
 202}
 203
 204/* Set the maximum number of each resource that the driver actually wants
 205 * to allocate. This may be up to the maximum number the firmware has
 206 * reserved for the function. The driver may choose to allocate fewer
 207 * resources than the firmware maximum.
 208 */
 209static void bnxt_re_limit_pf_res(struct bnxt_re_dev *rdev)
 210{
 211	struct bnxt_qplib_dev_attr *attr;
 212	struct bnxt_qplib_ctx *ctx;
 213	int i;
 214
 215	attr = &rdev->dev_attr;
 216	ctx = &rdev->qplib_ctx;
 217
 218	ctx->qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT,
 219			       attr->max_qp);
 220	ctx->mrw_count = BNXT_RE_MAX_MRW_COUNT_256K;
 221	/* Use max_mr from fw since max_mrw does not get set */
 222	ctx->mrw_count = min_t(u32, ctx->mrw_count, attr->max_mr);
 223	ctx->srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT,
 224				attr->max_srq);
 225	ctx->cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT, attr->max_cq);
 226	if (!bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
 227		for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
 228			rdev->qplib_ctx.tqm_ctx.qcount[i] =
 229			rdev->dev_attr.tqm_alloc_reqs[i];
 230}
 231
 232static void bnxt_re_limit_vf_res(struct bnxt_qplib_ctx *qplib_ctx, u32 num_vf)
 233{
 234	struct bnxt_qplib_vf_res *vf_res;
 235	u32 mrws = 0;
 236	u32 vf_pct;
 237	u32 nvfs;
 238
 239	vf_res = &qplib_ctx->vf_res;
 240	/*
 241	 * Reserve a set of resources for the PF. Divide the remaining
 242	 * resources among the VFs
 243	 */
 244	vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF;
 245	nvfs = num_vf;
 246	num_vf = 100 * num_vf;
 247	vf_res->max_qp_per_vf = (qplib_ctx->qpc_count * vf_pct) / num_vf;
 248	vf_res->max_srq_per_vf = (qplib_ctx->srqc_count * vf_pct) / num_vf;
 249	vf_res->max_cq_per_vf = (qplib_ctx->cq_count * vf_pct) / num_vf;
 250	/*
 251	 * The driver allows many more MRs than other resources. If the
 252	 * firmware does also, then reserve a fixed amount for the PF and
 253	 * divide the rest among VFs. VFs may use many MRs for NFS
 254	 * mounts, ISER, NVME applications, etc. If the firmware severely
 255	 * restricts the number of MRs, then let PF have half and divide
 256	 * the rest among VFs, as for the other resource types.
 257	 */
 258	if (qplib_ctx->mrw_count < BNXT_RE_MAX_MRW_COUNT_64K) {
 259		mrws = qplib_ctx->mrw_count * vf_pct;
 260		nvfs = num_vf;
 261	} else {
 262		mrws = qplib_ctx->mrw_count - BNXT_RE_RESVD_MR_FOR_PF;
 263	}
 264	vf_res->max_mrw_per_vf = (mrws / nvfs);
 265	vf_res->max_gid_per_vf = BNXT_RE_MAX_GID_PER_VF;
 266}
 267
 268static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 269{
 270	u32 num_vfs;
 271
 272	memset(&rdev->qplib_ctx.vf_res, 0, sizeof(struct bnxt_qplib_vf_res));
 273	bnxt_re_limit_pf_res(rdev);
 274
 275	num_vfs =  bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx) ?
 276			BNXT_RE_GEN_P5_MAX_VF : rdev->num_vfs;
 277	if (num_vfs)
 278		bnxt_re_limit_vf_res(&rdev->qplib_ctx, num_vfs);
 279}
 280
 281static void bnxt_re_vf_res_config(struct bnxt_re_dev *rdev)
 
 282{
 283	rdev->num_vfs = pci_sriov_get_totalvfs(rdev->en_dev->pdev);
 284	if (!bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx)) {
 
 
 
 
 
 
 
 
 
 
 
 
 
 285		bnxt_re_set_resource_limits(rdev);
 286		bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw,
 287					      &rdev->qplib_ctx);
 288	}
 289}
 290
 291static void bnxt_re_shutdown(struct auxiliary_device *adev)
 292{
 293	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
 294
 295	if (!rdev)
 296		return;
 297	ib_unregister_device(&rdev->ibdev);
 298	bnxt_re_dev_uninit(rdev);
 
 
 299}
 300
 301static void bnxt_re_stop_irq(void *handle)
 302{
 303	struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 304	struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 305	struct bnxt_qplib_nq *nq;
 306	int indx;
 307
 308	for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) {
 309		nq = &rdev->nq[indx - 1];
 310		bnxt_qplib_nq_stop_irq(nq, false);
 311	}
 312
 313	bnxt_qplib_rcfw_stop_irq(rcfw, false);
 314}
 315
 316static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
 317{
 318	struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
 319	struct bnxt_msix_entry *msix_ent = rdev->en_dev->msix_entries;
 320	struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
 321	struct bnxt_qplib_nq *nq;
 322	int indx, rc;
 323
 324	if (!ent) {
 325		/* Not setting the f/w timeout bit in rcfw.
 326		 * During the driver unload the first command
 327		 * to f/w will timeout and that will set the
 328		 * timeout bit.
 329		 */
 330		ibdev_err(&rdev->ibdev, "Failed to re-start IRQs\n");
 331		return;
 332	}
 333
 334	/* Vectors may change after restart, so update with new vectors
 335	 * in device sctructure.
 336	 */
 337	for (indx = 0; indx < rdev->num_msix; indx++)
 338		rdev->en_dev->msix_entries[indx].vector = ent[indx].vector;
 339
 340	rc = bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector,
 341				       false);
 342	if (rc) {
 343		ibdev_warn(&rdev->ibdev, "Failed to reinit CREQ\n");
 344		return;
 345	}
 346	for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) {
 347		nq = &rdev->nq[indx - 1];
 348		rc = bnxt_qplib_nq_start_irq(nq, indx - 1,
 349					     msix_ent[indx].vector, false);
 350		if (rc) {
 351			ibdev_warn(&rdev->ibdev, "Failed to reinit NQ index %d\n",
 352				   indx - 1);
 353			return;
 354		}
 355	}
 356}
 357
 358static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
 
 
 
 
 
 359	.ulp_irq_stop = bnxt_re_stop_irq,
 360	.ulp_irq_restart = bnxt_re_start_irq
 361};
 362
 363/* RoCE -> Net driver */
 364
 365static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
 
 
 
 366{
 367	struct bnxt_en_dev *en_dev;
 368	int rc;
 369
 
 
 
 370	en_dev = rdev->en_dev;
 371
 372	rc = bnxt_register_dev(en_dev, &bnxt_re_ulp_ops, rdev);
 373	if (!rc)
 374		rdev->qplib_res.pdev = rdev->en_dev->pdev;
 375	return rc;
 376}
 377
 378static void bnxt_re_init_hwrm_hdr(struct input *hdr, u16 opcd)
 379{
 380	hdr->req_type = cpu_to_le16(opcd);
 381	hdr->cmpl_ring = cpu_to_le16(-1);
 382	hdr->target_id = cpu_to_le16(-1);
 383}
 384
 385static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 386				int msg_len, void *resp, int resp_max_len,
 387				int timeout)
 388{
 389	fw_msg->msg = msg;
 390	fw_msg->msg_len = msg_len;
 391	fw_msg->resp = resp;
 392	fw_msg->resp_max_len = resp_max_len;
 393	fw_msg->timeout = timeout;
 394}
 395
 396/* Query device config using common hwrm */
 397static int bnxt_re_hwrm_qcfg(struct bnxt_re_dev *rdev, u32 *db_len,
 398			     u32 *offset)
 399{
 400	struct bnxt_en_dev *en_dev = rdev->en_dev;
 401	struct hwrm_func_qcfg_output resp = {0};
 402	struct hwrm_func_qcfg_input req = {0};
 403	struct bnxt_fw_msg fw_msg = {};
 404	int rc;
 405
 406	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_QCFG);
 407	req.fid = cpu_to_le16(0xffff);
 408	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 409			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 410	rc = bnxt_send_msg(en_dev, &fw_msg);
 411	if (!rc) {
 412		*db_len = PAGE_ALIGN(le16_to_cpu(resp.l2_doorbell_bar_size_kb) * 1024);
 413		*offset = PAGE_ALIGN(le16_to_cpu(resp.legacy_l2_db_size_kb) * 1024);
 414	}
 415	return rc;
 416}
 417
 418/* Query function capabilities using common hwrm */
 419int bnxt_re_hwrm_qcaps(struct bnxt_re_dev *rdev)
 420{
 421	struct bnxt_en_dev *en_dev = rdev->en_dev;
 422	struct hwrm_func_qcaps_output resp = {};
 423	struct hwrm_func_qcaps_input req = {};
 424	struct bnxt_qplib_chip_ctx *cctx;
 425	struct bnxt_fw_msg fw_msg = {};
 426	int rc;
 427
 428	cctx = rdev->chip_ctx;
 429	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_QCAPS);
 430	req.fid = cpu_to_le16(0xffff);
 431	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 432			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 433
 434	rc = bnxt_send_msg(en_dev, &fw_msg);
 435	if (rc)
 436		return rc;
 437	cctx->modes.db_push = le32_to_cpu(resp.flags) & FUNC_QCAPS_RESP_FLAGS_WCB_PUSH_MODE;
 438
 439	cctx->modes.dbr_pacing =
 440		le32_to_cpu(resp.flags_ext2) &
 441		FUNC_QCAPS_RESP_FLAGS_EXT2_DBR_PACING_EXT_SUPPORTED;
 442	return 0;
 443}
 444
 445static int bnxt_re_hwrm_dbr_pacing_qcfg(struct bnxt_re_dev *rdev)
 446{
 447	struct hwrm_func_dbr_pacing_qcfg_output resp = {};
 448	struct hwrm_func_dbr_pacing_qcfg_input req = {};
 449	struct bnxt_en_dev *en_dev = rdev->en_dev;
 450	struct bnxt_qplib_chip_ctx *cctx;
 451	struct bnxt_fw_msg fw_msg = {};
 452	int rc;
 453
 454	cctx = rdev->chip_ctx;
 455	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_DBR_PACING_QCFG);
 456	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 457			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 458	rc = bnxt_send_msg(en_dev, &fw_msg);
 459	if (rc)
 460		return rc;
 461
 462	if ((le32_to_cpu(resp.dbr_stat_db_fifo_reg) &
 463	    FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_MASK) ==
 464		FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_GRC)
 465		cctx->dbr_stat_db_fifo =
 466			le32_to_cpu(resp.dbr_stat_db_fifo_reg) &
 467			~FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_MASK;
 468	return 0;
 469}
 470
 471/* Update the pacing tunable parameters to the default values */
 472static void bnxt_re_set_default_pacing_data(struct bnxt_re_dev *rdev)
 473{
 474	struct bnxt_qplib_db_pacing_data *pacing_data = rdev->qplib_res.pacing_data;
 475
 476	pacing_data->do_pacing = rdev->pacing.dbr_def_do_pacing;
 477	pacing_data->pacing_th = rdev->pacing.pacing_algo_th;
 478	pacing_data->alarm_th =
 479		pacing_data->pacing_th * BNXT_RE_PACING_ALARM_TH_MULTIPLE;
 480}
 481
 482static void __wait_for_fifo_occupancy_below_th(struct bnxt_re_dev *rdev)
 483{
 484	u32 read_val, fifo_occup;
 485
 486	/* loop shouldn't run infintely as the occupancy usually goes
 487	 * below pacing algo threshold as soon as pacing kicks in.
 488	 */
 489	while (1) {
 490		read_val = readl(rdev->en_dev->bar0 + rdev->pacing.dbr_db_fifo_reg_off);
 491		fifo_occup = BNXT_RE_MAX_FIFO_DEPTH -
 492			((read_val & BNXT_RE_DB_FIFO_ROOM_MASK) >>
 493			 BNXT_RE_DB_FIFO_ROOM_SHIFT);
 494		/* Fifo occupancy cannot be greater the MAX FIFO depth */
 495		if (fifo_occup > BNXT_RE_MAX_FIFO_DEPTH)
 496			break;
 497
 498		if (fifo_occup < rdev->qplib_res.pacing_data->pacing_th)
 499			break;
 500	}
 501}
 502
 503static void bnxt_re_db_fifo_check(struct work_struct *work)
 504{
 505	struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
 506			dbq_fifo_check_work);
 507	struct bnxt_qplib_db_pacing_data *pacing_data;
 508	u32 pacing_save;
 509
 510	if (!mutex_trylock(&rdev->pacing.dbq_lock))
 511		return;
 512	pacing_data = rdev->qplib_res.pacing_data;
 513	pacing_save = rdev->pacing.do_pacing_save;
 514	__wait_for_fifo_occupancy_below_th(rdev);
 515	cancel_delayed_work_sync(&rdev->dbq_pacing_work);
 516	if (pacing_save > rdev->pacing.dbr_def_do_pacing) {
 517		/* Double the do_pacing value during the congestion */
 518		pacing_save = pacing_save << 1;
 519	} else {
 520		/*
 521		 * when a new congestion is detected increase the do_pacing
 522		 * by 8 times. And also increase the pacing_th by 4 times. The
 523		 * reason to increase pacing_th is to give more space for the
 524		 * queue to oscillate down without getting empty, but also more
 525		 * room for the queue to increase without causing another alarm.
 526		 */
 527		pacing_save = pacing_save << 3;
 528		pacing_data->pacing_th = rdev->pacing.pacing_algo_th * 4;
 529	}
 530
 531	if (pacing_save > BNXT_RE_MAX_DBR_DO_PACING)
 532		pacing_save = BNXT_RE_MAX_DBR_DO_PACING;
 533
 534	pacing_data->do_pacing = pacing_save;
 535	rdev->pacing.do_pacing_save = pacing_data->do_pacing;
 536	pacing_data->alarm_th =
 537		pacing_data->pacing_th * BNXT_RE_PACING_ALARM_TH_MULTIPLE;
 538	schedule_delayed_work(&rdev->dbq_pacing_work,
 539			      msecs_to_jiffies(rdev->pacing.dbq_pacing_time));
 540	rdev->stats.pacing.alerts++;
 541	mutex_unlock(&rdev->pacing.dbq_lock);
 542}
 543
 544static void bnxt_re_pacing_timer_exp(struct work_struct *work)
 545{
 546	struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
 547			dbq_pacing_work.work);
 548	struct bnxt_qplib_db_pacing_data *pacing_data;
 549	u32 read_val, fifo_occup;
 550
 551	if (!mutex_trylock(&rdev->pacing.dbq_lock))
 552		return;
 553
 554	pacing_data = rdev->qplib_res.pacing_data;
 555	read_val = readl(rdev->en_dev->bar0 + rdev->pacing.dbr_db_fifo_reg_off);
 556	fifo_occup = BNXT_RE_MAX_FIFO_DEPTH -
 557		((read_val & BNXT_RE_DB_FIFO_ROOM_MASK) >>
 558		 BNXT_RE_DB_FIFO_ROOM_SHIFT);
 559
 560	if (fifo_occup > pacing_data->pacing_th)
 561		goto restart_timer;
 562
 563	/*
 564	 * Instead of immediately going back to the default do_pacing
 565	 * reduce it by 1/8 times and restart the timer.
 566	 */
 567	pacing_data->do_pacing = pacing_data->do_pacing - (pacing_data->do_pacing >> 3);
 568	pacing_data->do_pacing = max_t(u32, rdev->pacing.dbr_def_do_pacing, pacing_data->do_pacing);
 569	if (pacing_data->do_pacing <= rdev->pacing.dbr_def_do_pacing) {
 570		bnxt_re_set_default_pacing_data(rdev);
 571		rdev->stats.pacing.complete++;
 572		goto dbq_unlock;
 573	}
 574
 575restart_timer:
 576	schedule_delayed_work(&rdev->dbq_pacing_work,
 577			      msecs_to_jiffies(rdev->pacing.dbq_pacing_time));
 578	rdev->stats.pacing.resched++;
 579dbq_unlock:
 580	rdev->pacing.do_pacing_save = pacing_data->do_pacing;
 581	mutex_unlock(&rdev->pacing.dbq_lock);
 582}
 583
 584void bnxt_re_pacing_alert(struct bnxt_re_dev *rdev)
 585{
 586	struct bnxt_qplib_db_pacing_data *pacing_data;
 587
 588	if (!rdev->pacing.dbr_pacing)
 589		return;
 590	mutex_lock(&rdev->pacing.dbq_lock);
 591	pacing_data = rdev->qplib_res.pacing_data;
 592
 593	/*
 594	 * Increase the alarm_th to max so that other user lib instances do not
 595	 * keep alerting the driver.
 596	 */
 597	pacing_data->alarm_th = BNXT_RE_MAX_FIFO_DEPTH;
 598	pacing_data->do_pacing = BNXT_RE_MAX_DBR_DO_PACING;
 599	cancel_work_sync(&rdev->dbq_fifo_check_work);
 600	schedule_work(&rdev->dbq_fifo_check_work);
 601	mutex_unlock(&rdev->pacing.dbq_lock);
 602}
 603
 604static int bnxt_re_initialize_dbr_pacing(struct bnxt_re_dev *rdev)
 
 605{
 606	if (bnxt_re_hwrm_dbr_pacing_qcfg(rdev))
 607		return -EIO;
 608
 609	/* Allocate a page for app use */
 610	rdev->pacing.dbr_page = (void *)__get_free_page(GFP_KERNEL);
 611	if (!rdev->pacing.dbr_page)
 612		return -ENOMEM;
 613
 614	memset((u8 *)rdev->pacing.dbr_page, 0, PAGE_SIZE);
 615	rdev->qplib_res.pacing_data = (struct bnxt_qplib_db_pacing_data *)rdev->pacing.dbr_page;
 616
 617	/* MAP HW window 2 for reading db fifo depth */
 618	writel(rdev->chip_ctx->dbr_stat_db_fifo & BNXT_GRC_BASE_MASK,
 619	       rdev->en_dev->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 4);
 620	rdev->pacing.dbr_db_fifo_reg_off =
 621		(rdev->chip_ctx->dbr_stat_db_fifo & BNXT_GRC_OFFSET_MASK) +
 622		 BNXT_RE_GRC_FIFO_REG_BASE;
 623	rdev->pacing.dbr_bar_addr =
 624		pci_resource_start(rdev->qplib_res.pdev, 0) + rdev->pacing.dbr_db_fifo_reg_off;
 625
 626	rdev->pacing.pacing_algo_th = BNXT_RE_PACING_ALGO_THRESHOLD;
 627	rdev->pacing.dbq_pacing_time = BNXT_RE_DBR_PACING_TIME;
 628	rdev->pacing.dbr_def_do_pacing = BNXT_RE_DBR_DO_PACING_NO_CONGESTION;
 629	rdev->pacing.do_pacing_save = rdev->pacing.dbr_def_do_pacing;
 630	rdev->qplib_res.pacing_data->fifo_max_depth = BNXT_RE_MAX_FIFO_DEPTH;
 631	rdev->qplib_res.pacing_data->fifo_room_mask = BNXT_RE_DB_FIFO_ROOM_MASK;
 632	rdev->qplib_res.pacing_data->fifo_room_shift = BNXT_RE_DB_FIFO_ROOM_SHIFT;
 633	rdev->qplib_res.pacing_data->grc_reg_offset = rdev->pacing.dbr_db_fifo_reg_off;
 634	bnxt_re_set_default_pacing_data(rdev);
 635	/* Initialize worker for DBR Pacing */
 636	INIT_WORK(&rdev->dbq_fifo_check_work, bnxt_re_db_fifo_check);
 637	INIT_DELAYED_WORK(&rdev->dbq_pacing_work, bnxt_re_pacing_timer_exp);
 638	return 0;
 639}
 640
 641static void bnxt_re_deinitialize_dbr_pacing(struct bnxt_re_dev *rdev)
 
 
 642{
 643	cancel_work_sync(&rdev->dbq_fifo_check_work);
 644	cancel_delayed_work_sync(&rdev->dbq_pacing_work);
 645	if (rdev->pacing.dbr_page)
 646		free_page((u64)rdev->pacing.dbr_page);
 647
 648	rdev->pacing.dbr_page = NULL;
 649	rdev->pacing.dbr_pacing = false;
 650}
 651
 652static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev,
 653				 u16 fw_ring_id, int type)
 654{
 655	struct bnxt_en_dev *en_dev;
 656	struct hwrm_ring_free_input req = {};
 657	struct hwrm_ring_free_output resp;
 658	struct bnxt_fw_msg fw_msg = {};
 659	int rc = -EINVAL;
 660
 661	if (!rdev)
 662		return rc;
 663
 664	en_dev = rdev->en_dev;
 665
 666	if (!en_dev)
 667		return rc;
 668
 669	if (test_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags))
 670		return 0;
 671
 672	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_RING_FREE);
 673	req.ring_type = type;
 674	req.ring_id = cpu_to_le16(fw_ring_id);
 675	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 676			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 677	rc = bnxt_send_msg(en_dev, &fw_msg);
 678	if (rc)
 679		ibdev_err(&rdev->ibdev, "Failed to free HW ring:%d :%#x",
 680			  req.ring_id, rc);
 681	return rc;
 682}
 683
 684static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev,
 685				  struct bnxt_re_ring_attr *ring_attr,
 686				  u16 *fw_ring_id)
 687{
 688	struct bnxt_en_dev *en_dev = rdev->en_dev;
 689	struct hwrm_ring_alloc_input req = {};
 690	struct hwrm_ring_alloc_output resp;
 691	struct bnxt_fw_msg fw_msg = {};
 692	int rc = -EINVAL;
 693
 694	if (!en_dev)
 695		return rc;
 696
 697	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_RING_ALLOC);
 
 698	req.enables = 0;
 699	req.page_tbl_addr =  cpu_to_le64(ring_attr->dma_arr[0]);
 700	if (ring_attr->pages > 1) {
 701		/* Page size is in log2 units */
 702		req.page_size = BNXT_PAGE_SHIFT;
 703		req.page_tbl_depth = 1;
 704	}
 705	req.fbo = 0;
 706	/* Association of ring index with doorbell index and MSIX number */
 707	req.logical_id = cpu_to_le16(ring_attr->lrid);
 708	req.length = cpu_to_le32(ring_attr->depth + 1);
 709	req.ring_type = ring_attr->type;
 710	req.int_mode = ring_attr->mode;
 711	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 712			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 713	rc = bnxt_send_msg(en_dev, &fw_msg);
 714	if (!rc)
 715		*fw_ring_id = le16_to_cpu(resp.ring_id);
 716
 717	return rc;
 718}
 719
 720static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
 721				      u32 fw_stats_ctx_id)
 722{
 723	struct bnxt_en_dev *en_dev = rdev->en_dev;
 724	struct hwrm_stat_ctx_free_input req = {};
 725	struct hwrm_stat_ctx_free_output resp = {};
 726	struct bnxt_fw_msg fw_msg = {};
 727	int rc = -EINVAL;
 728
 729	if (!en_dev)
 730		return rc;
 731
 732	if (test_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags))
 733		return 0;
 734
 735	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_STAT_CTX_FREE);
 736	req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
 737	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 738			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 739	rc = bnxt_send_msg(en_dev, &fw_msg);
 740	if (rc)
 741		ibdev_err(&rdev->ibdev, "Failed to free HW stats context %#x",
 742			  rc);
 743
 744	return rc;
 745}
 746
 747static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
 748				       dma_addr_t dma_map,
 749				       u32 *fw_stats_ctx_id)
 750{
 751	struct bnxt_qplib_chip_ctx *chip_ctx = rdev->chip_ctx;
 752	struct hwrm_stat_ctx_alloc_output resp = {};
 753	struct hwrm_stat_ctx_alloc_input req = {};
 754	struct bnxt_en_dev *en_dev = rdev->en_dev;
 755	struct bnxt_fw_msg fw_msg = {};
 756	int rc = -EINVAL;
 757
 758	*fw_stats_ctx_id = INVALID_STATS_CTX_ID;
 759
 760	if (!en_dev)
 761		return rc;
 762
 763	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_STAT_CTX_ALLOC);
 
 
 764	req.update_period_ms = cpu_to_le32(1000);
 765	req.stats_dma_addr = cpu_to_le64(dma_map);
 766	req.stats_dma_length = cpu_to_le16(chip_ctx->hw_stats_size);
 767	req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
 768	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
 769			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
 770	rc = bnxt_send_msg(en_dev, &fw_msg);
 771	if (!rc)
 772		*fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
 773
 774	return rc;
 775}
 776
 777static void bnxt_re_disassociate_ucontext(struct ib_ucontext *ibcontext)
 
 
 778{
 779}
 780
 781/* Device */
 
 
 
 
 
 
 
 
 
 782
 783static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
 784{
 785	struct ib_device *ibdev =
 786		ib_device_get_by_netdev(netdev, RDMA_DRIVER_BNXT_RE);
 787	if (!ibdev)
 788		return NULL;
 789
 790	return container_of(ibdev, struct bnxt_re_dev, ibdev);
 791}
 792
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 793static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 794			   char *buf)
 795{
 796	struct bnxt_re_dev *rdev =
 797		rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
 798
 799	return sysfs_emit(buf, "0x%x\n", rdev->en_dev->pdev->vendor);
 800}
 801static DEVICE_ATTR_RO(hw_rev);
 802
 803static ssize_t hca_type_show(struct device *device,
 804			     struct device_attribute *attr, char *buf)
 805{
 806	struct bnxt_re_dev *rdev =
 807		rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
 808
 809	return sysfs_emit(buf, "%s\n", rdev->ibdev.node_desc);
 810}
 811static DEVICE_ATTR_RO(hca_type);
 812
 813static struct attribute *bnxt_re_attributes[] = {
 814	&dev_attr_hw_rev.attr,
 815	&dev_attr_hca_type.attr,
 816	NULL
 817};
 818
 819static const struct attribute_group bnxt_re_dev_attr_group = {
 820	.attrs = bnxt_re_attributes,
 821};
 822
 823static const struct ib_device_ops bnxt_re_dev_ops = {
 824	.owner = THIS_MODULE,
 825	.driver_id = RDMA_DRIVER_BNXT_RE,
 826	.uverbs_abi_ver = BNXT_RE_ABI_VERSION,
 827
 828	.add_gid = bnxt_re_add_gid,
 829	.alloc_hw_port_stats = bnxt_re_ib_alloc_hw_port_stats,
 830	.alloc_mr = bnxt_re_alloc_mr,
 831	.alloc_pd = bnxt_re_alloc_pd,
 832	.alloc_ucontext = bnxt_re_alloc_ucontext,
 833	.create_ah = bnxt_re_create_ah,
 834	.create_cq = bnxt_re_create_cq,
 835	.create_qp = bnxt_re_create_qp,
 836	.create_srq = bnxt_re_create_srq,
 837	.create_user_ah = bnxt_re_create_ah,
 838	.dealloc_pd = bnxt_re_dealloc_pd,
 839	.dealloc_ucontext = bnxt_re_dealloc_ucontext,
 840	.del_gid = bnxt_re_del_gid,
 841	.dereg_mr = bnxt_re_dereg_mr,
 842	.destroy_ah = bnxt_re_destroy_ah,
 843	.destroy_cq = bnxt_re_destroy_cq,
 844	.destroy_qp = bnxt_re_destroy_qp,
 845	.destroy_srq = bnxt_re_destroy_srq,
 846	.device_group = &bnxt_re_dev_attr_group,
 847	.disassociate_ucontext = bnxt_re_disassociate_ucontext,
 848	.get_dev_fw_str = bnxt_re_query_fw_str,
 849	.get_dma_mr = bnxt_re_get_dma_mr,
 850	.get_hw_stats = bnxt_re_ib_get_hw_stats,
 851	.get_link_layer = bnxt_re_get_link_layer,
 852	.get_port_immutable = bnxt_re_get_port_immutable,
 853	.map_mr_sg = bnxt_re_map_mr_sg,
 854	.mmap = bnxt_re_mmap,
 855	.mmap_free = bnxt_re_mmap_free,
 856	.modify_qp = bnxt_re_modify_qp,
 857	.modify_srq = bnxt_re_modify_srq,
 858	.poll_cq = bnxt_re_poll_cq,
 859	.post_recv = bnxt_re_post_recv,
 860	.post_send = bnxt_re_post_send,
 861	.post_srq_recv = bnxt_re_post_srq_recv,
 862	.query_ah = bnxt_re_query_ah,
 863	.query_device = bnxt_re_query_device,
 864	.query_pkey = bnxt_re_query_pkey,
 865	.query_port = bnxt_re_query_port,
 866	.query_qp = bnxt_re_query_qp,
 867	.query_srq = bnxt_re_query_srq,
 868	.reg_user_mr = bnxt_re_reg_user_mr,
 869	.reg_user_mr_dmabuf = bnxt_re_reg_user_mr_dmabuf,
 870	.req_notify_cq = bnxt_re_req_notify_cq,
 871	.resize_cq = bnxt_re_resize_cq,
 872	INIT_RDMA_OBJ_SIZE(ib_ah, bnxt_re_ah, ib_ah),
 873	INIT_RDMA_OBJ_SIZE(ib_cq, bnxt_re_cq, ib_cq),
 874	INIT_RDMA_OBJ_SIZE(ib_pd, bnxt_re_pd, ib_pd),
 875	INIT_RDMA_OBJ_SIZE(ib_qp, bnxt_re_qp, ib_qp),
 876	INIT_RDMA_OBJ_SIZE(ib_srq, bnxt_re_srq, ib_srq),
 877	INIT_RDMA_OBJ_SIZE(ib_ucontext, bnxt_re_ucontext, ib_uctx),
 878};
 879
 880static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 881{
 882	struct ib_device *ibdev = &rdev->ibdev;
 883	int ret;
 884
 885	/* ib device init */
 886	ibdev->node_type = RDMA_NODE_IB_CA;
 887	strscpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
 888		strlen(BNXT_RE_DESC) + 5);
 889	ibdev->phys_port_cnt = 1;
 890
 891	addrconf_addr_eui48((u8 *)&ibdev->node_guid, rdev->netdev->dev_addr);
 892
 893	ibdev->num_comp_vectors	= rdev->num_msix - 1;
 894	ibdev->dev.parent = &rdev->en_dev->pdev->dev;
 895	ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
 896
 897	if (IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS))
 898		ibdev->driver_def = bnxt_re_uapi_defs;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 899
 
 900	ib_set_device_ops(ibdev, &bnxt_re_dev_ops);
 901	ret = ib_device_set_netdev(&rdev->ibdev, rdev->netdev, 1);
 902	if (ret)
 903		return ret;
 904
 905	dma_set_max_seg_size(&rdev->en_dev->pdev->dev, UINT_MAX);
 906	ibdev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ);
 907	return ib_register_device(ibdev, "bnxt_re%d", &rdev->en_dev->pdev->dev);
 908}
 909
 910static struct bnxt_re_dev *bnxt_re_dev_add(struct bnxt_aux_priv *aux_priv,
 
 
 
 
 
 
 
 
 
 
 
 911					   struct bnxt_en_dev *en_dev)
 912{
 913	struct bnxt_re_dev *rdev;
 914
 915	/* Allocate bnxt_re_dev instance here */
 916	rdev = ib_alloc_device(bnxt_re_dev, ibdev);
 917	if (!rdev) {
 918		ibdev_err(NULL, "%s: bnxt_re_dev allocation failure!",
 919			  ROCE_DRV_MODULE_NAME);
 920		return NULL;
 921	}
 922	/* Default values */
 923	rdev->nb.notifier_call = NULL;
 924	rdev->netdev = en_dev->net;
 925	rdev->en_dev = en_dev;
 926	rdev->id = rdev->en_dev->pdev->devfn;
 927	INIT_LIST_HEAD(&rdev->qp_list);
 928	mutex_init(&rdev->qp_lock);
 929	mutex_init(&rdev->pacing.dbq_lock);
 930	atomic_set(&rdev->stats.res.qp_count, 0);
 931	atomic_set(&rdev->stats.res.cq_count, 0);
 932	atomic_set(&rdev->stats.res.srq_count, 0);
 933	atomic_set(&rdev->stats.res.mr_count, 0);
 934	atomic_set(&rdev->stats.res.mw_count, 0);
 935	atomic_set(&rdev->stats.res.ah_count, 0);
 936	atomic_set(&rdev->stats.res.pd_count, 0);
 937	rdev->cosq[0] = 0xFFFF;
 938	rdev->cosq[1] = 0xFFFF;
 939
 
 
 
 940	return rdev;
 941}
 942
 943static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
 944					     *unaffi_async)
 945{
 946	switch (unaffi_async->event) {
 947	case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 948		break;
 949	case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 950		break;
 951	case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 952		break;
 953	case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 954		break;
 955	case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 956		break;
 957	case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 958		break;
 959	case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 960		break;
 961	case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 962		break;
 963	case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 964		break;
 965	case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 966		break;
 967	case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 968		break;
 969	default:
 970		return -EINVAL;
 971	}
 972	return 0;
 973}
 974
 975static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 976					 struct bnxt_re_qp *qp)
 977{
 978	struct bnxt_re_srq *srq = container_of(qp->qplib_qp.srq, struct bnxt_re_srq,
 979					       qplib_srq);
 980	struct creq_qp_error_notification *err_event;
 981	struct ib_event event = {};
 982	unsigned int flags;
 983
 984	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR &&
 985	    rdma_is_kernel_res(&qp->ib_qp.res)) {
 986		flags = bnxt_re_lock_cqs(qp);
 987		bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 988		bnxt_re_unlock_cqs(qp, flags);
 989	}
 990
 991	event.device = &qp->rdev->ibdev;
 992	event.element.qp = &qp->ib_qp;
 993	event.event = IB_EVENT_QP_FATAL;
 994
 995	err_event = (struct creq_qp_error_notification *)qp_event;
 996
 997	switch (err_event->req_err_state_reason) {
 998	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_OPCODE_ERROR:
 999	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_TIMEOUT_RETRY_LIMIT:
1000	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_RNR_TIMEOUT_RETRY_LIMIT:
1001	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_NAK_ARRIVAL_2:
1002	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_NAK_ARRIVAL_3:
1003	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_INVALID_READ_RESP:
1004	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_ILLEGAL_BIND:
1005	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_ILLEGAL_FAST_REG:
1006	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_ILLEGAL_INVALIDATE:
1007	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_RETRAN_LOCAL_ERROR:
1008	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_AV_DOMAIN_ERROR:
1009	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_PROD_WQE_MSMTCH_ERROR:
1010	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_PSN_RANGE_CHECK_ERROR:
1011		event.event = IB_EVENT_QP_ACCESS_ERR;
1012		break;
1013	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_NAK_ARRIVAL_1:
1014	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_NAK_ARRIVAL_4:
1015	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_READ_RESP_LENGTH:
1016	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_WQE_FORMAT_ERROR:
1017	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_ORRQ_FORMAT_ERROR:
1018	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_INVALID_AVID_ERROR:
1019	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_SERV_TYPE_ERROR:
1020	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_INVALID_OP_ERROR:
1021		event.event = IB_EVENT_QP_REQ_ERR;
1022		break;
1023	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_RX_MEMORY_ERROR:
1024	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_TX_MEMORY_ERROR:
1025	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_CMP_ERROR:
1026	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_CQ_LOAD_ERROR:
1027	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_TX_PCI_ERROR:
1028	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_RX_PCI_ERROR:
1029	case CREQ_QP_ERROR_NOTIFICATION_REQ_ERR_STATE_REASON_REQ_RETX_SETUP_ERROR:
1030		event.event = IB_EVENT_QP_FATAL;
1031		break;
1032
1033	default:
1034		break;
1035	}
1036
1037	switch (err_event->res_err_state_reason) {
1038	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_EXCEED_MAX:
1039	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_PAYLOAD_LENGTH_MISMATCH:
1040	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_PSN_SEQ_ERROR_RETRY_LIMIT:
1041	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_RX_INVALID_R_KEY:
1042	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_RX_DOMAIN_ERROR:
1043	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_RX_NO_PERMISSION:
1044	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_RX_RANGE_ERROR:
1045	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_TX_INVALID_R_KEY:
1046	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_TX_DOMAIN_ERROR:
1047	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_TX_NO_PERMISSION:
1048	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_TX_RANGE_ERROR:
1049	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_UNALIGN_ATOMIC:
1050	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_PSN_NOT_FOUND:
1051	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_INVALID_DUP_RKEY:
1052	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_IRRQ_FORMAT_ERROR:
1053		event.event = IB_EVENT_QP_ACCESS_ERR;
1054		break;
1055	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_EXCEEDS_WQE:
1056	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_WQE_FORMAT_ERROR:
1057	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_UNSUPPORTED_OPCODE:
1058	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_REM_INVALIDATE:
1059	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_OPCODE_ERROR:
1060		event.event = IB_EVENT_QP_REQ_ERR;
1061		break;
1062	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_IRRQ_OFLOW:
1063	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_CMP_ERROR:
1064	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_CQ_LOAD_ERROR:
1065	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_TX_PCI_ERROR:
1066	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_RX_PCI_ERROR:
1067	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_MEMORY_ERROR:
1068		event.event = IB_EVENT_QP_FATAL;
1069		break;
1070	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_SRQ_LOAD_ERROR:
1071	case CREQ_QP_ERROR_NOTIFICATION_RES_ERR_STATE_REASON_RES_SRQ_ERROR:
1072		if (srq)
1073			event.event = IB_EVENT_SRQ_ERR;
1074		break;
1075	default:
1076		break;
1077	}
1078
1079	if (err_event->res_err_state_reason || err_event->req_err_state_reason) {
1080		ibdev_dbg(&qp->rdev->ibdev,
1081			  "%s %s qp_id: %d cons (%d %d) req (%d %d) res (%d %d)\n",
1082			   __func__, rdma_is_kernel_res(&qp->ib_qp.res) ? "kernel" : "user",
1083			   qp->qplib_qp.id,
1084			   err_event->sq_cons_idx,
1085			   err_event->rq_cons_idx,
1086			   err_event->req_slow_path_state,
1087			   err_event->req_err_state_reason,
1088			   err_event->res_slow_path_state,
1089			   err_event->res_err_state_reason);
1090	} else {
1091		if (srq)
1092			event.event = IB_EVENT_QP_LAST_WQE_REACHED;
1093	}
1094
1095	if (event.event == IB_EVENT_SRQ_ERR && srq->ib_srq.event_handler)  {
1096		(*srq->ib_srq.event_handler)(&event,
1097				srq->ib_srq.srq_context);
1098	} else if (event.device && qp->ib_qp.event_handler) {
1099		qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
1100	}
1101
1102	return 0;
1103}
1104
1105static int bnxt_re_handle_cq_async_error(void *event, struct bnxt_re_cq *cq)
1106{
1107	struct creq_cq_error_notification *cqerr;
1108	struct ib_event ibevent = {};
1109
1110	cqerr = event;
1111	switch (cqerr->cq_err_reason) {
1112	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_REQ_CQ_INVALID_ERROR:
1113	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_REQ_CQ_OVERFLOW_ERROR:
1114	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_REQ_CQ_LOAD_ERROR:
1115	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_RES_CQ_INVALID_ERROR:
1116	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_RES_CQ_OVERFLOW_ERROR:
1117	case CREQ_CQ_ERROR_NOTIFICATION_CQ_ERR_REASON_RES_CQ_LOAD_ERROR:
1118		ibevent.event = IB_EVENT_CQ_ERR;
1119		break;
1120	default:
1121		break;
1122	}
1123
1124	if (ibevent.event == IB_EVENT_CQ_ERR && cq->ib_cq.event_handler) {
1125		ibevent.element.cq = &cq->ib_cq;
1126		ibevent.device = &cq->rdev->ibdev;
1127
1128		ibdev_dbg(&cq->rdev->ibdev,
1129			  "%s err reason %d\n", __func__, cqerr->cq_err_reason);
1130		cq->ib_cq.event_handler(&ibevent, cq->ib_cq.cq_context);
1131	}
1132
1133	return 0;
1134}
1135
1136static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
1137					   void *obj)
1138{
1139	struct bnxt_qplib_qp *lib_qp;
1140	struct bnxt_qplib_cq *lib_cq;
1141	struct bnxt_re_qp *qp;
1142	struct bnxt_re_cq *cq;
1143	int rc = 0;
1144	u8 event;
1145
1146	if (!obj)
1147		return rc; /* QP was already dead, still return success */
1148
1149	event = affi_async->event;
1150	switch (event) {
1151	case CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION:
1152		lib_qp = obj;
1153		qp = container_of(lib_qp, struct bnxt_re_qp, qplib_qp);
1154		rc = bnxt_re_handle_qp_async_event(affi_async, qp);
1155		break;
1156	case CREQ_QP_EVENT_EVENT_CQ_ERROR_NOTIFICATION:
1157		lib_cq = obj;
1158		cq = container_of(lib_cq, struct bnxt_re_cq, qplib_cq);
1159		rc = bnxt_re_handle_cq_async_error(affi_async, cq);
1160		break;
1161	default:
1162		rc = -EINVAL;
1163	}
1164	return rc;
1165}
1166
1167static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
1168			       void *aeqe, void *obj)
1169{
1170	struct creq_qp_event *affi_async;
1171	struct creq_func_event *unaffi_async;
1172	u8 type;
1173	int rc;
1174
1175	type = ((struct creq_base *)aeqe)->type;
1176	if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
1177		unaffi_async = aeqe;
1178		rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
1179	} else {
1180		affi_async = aeqe;
1181		rc = bnxt_re_handle_affi_async_event(affi_async, obj);
1182	}
1183
1184	return rc;
1185}
1186
1187static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
1188				struct bnxt_qplib_srq *handle, u8 event)
1189{
1190	struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
1191					       qplib_srq);
1192	struct ib_event ib_event;
 
1193
 
 
 
 
 
 
1194	ib_event.device = &srq->rdev->ibdev;
1195	ib_event.element.srq = &srq->ib_srq;
 
 
 
 
1196
1197	if (srq->ib_srq.event_handler) {
1198		if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
1199			ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
1200		(*srq->ib_srq.event_handler)(&ib_event,
1201					     srq->ib_srq.srq_context);
1202	}
1203	return 0;
 
1204}
1205
1206static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
1207			       struct bnxt_qplib_cq *handle)
1208{
1209	struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
1210					     qplib_cq);
1211	u32 *cq_ptr;
1212
 
 
 
 
 
1213	if (cq->ib_cq.comp_handler) {
1214		if (cq->uctx_cq_page) {
1215			cq_ptr = (u32 *)cq->uctx_cq_page;
1216			*cq_ptr = cq->qplib_cq.toggle;
1217		}
1218		(*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
1219	}
1220
1221	return 0;
1222}
1223
 
 
 
 
 
 
 
 
 
 
1224static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
1225{
1226	int i;
1227
1228	for (i = 1; i < rdev->num_msix; i++)
1229		bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
1230
1231	if (rdev->qplib_res.rcfw)
1232		bnxt_qplib_cleanup_res(&rdev->qplib_res);
1233}
1234
1235static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
1236{
1237	int num_vec_enabled = 0;
1238	int rc = 0, i;
1239	u32 db_offt;
1240
1241	bnxt_qplib_init_res(&rdev->qplib_res);
1242
1243	for (i = 1; i < rdev->num_msix ; i++) {
1244		db_offt = rdev->en_dev->msix_entries[i].db_offset;
1245		rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
1246					  i - 1, rdev->en_dev->msix_entries[i].vector,
1247					  db_offt, &bnxt_re_cqn_handler,
1248					  &bnxt_re_srqn_handler);
1249		if (rc) {
1250			ibdev_err(&rdev->ibdev,
1251				  "Failed to enable NQ with rc = 0x%x", rc);
1252			goto fail;
1253		}
1254		num_vec_enabled++;
1255	}
1256	return 0;
1257fail:
1258	for (i = num_vec_enabled; i >= 0; i--)
1259		bnxt_qplib_disable_nq(&rdev->nq[i]);
1260	return rc;
1261}
1262
1263static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev)
1264{
1265	u8 type;
1266	int i;
1267
1268	for (i = 0; i < rdev->num_msix - 1; i++) {
1269		type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1270		bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type);
1271		bnxt_qplib_free_nq(&rdev->nq[i]);
1272		rdev->nq[i].res = NULL;
1273	}
1274}
1275
1276static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
1277{
1278	bnxt_re_free_nq_res(rdev);
1279
1280	if (rdev->qplib_res.dpi_tbl.max) {
1281		bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 
1282				       &rdev->dpi_privileged);
1283	}
1284	if (rdev->qplib_res.rcfw) {
1285		bnxt_qplib_free_res(&rdev->qplib_res);
1286		rdev->qplib_res.rcfw = NULL;
1287	}
1288}
1289
1290static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
1291{
1292	struct bnxt_re_ring_attr rattr = {};
1293	int num_vec_created = 0;
1294	int rc, i;
1295	u8 type;
1296
1297	/* Configure and allocate resources for qplib */
1298	rdev->qplib_res.rcfw = &rdev->rcfw;
1299	rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
 
1300	if (rc)
1301		goto fail;
1302
1303	rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
1304				  rdev->netdev, &rdev->dev_attr);
1305	if (rc)
1306		goto fail;
1307
1308	rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res,
1309				  &rdev->dpi_privileged,
1310				  rdev, BNXT_QPLIB_DPI_TYPE_KERNEL);
1311	if (rc)
1312		goto dealloc_res;
1313
1314	for (i = 0; i < rdev->num_msix - 1; i++) {
1315		struct bnxt_qplib_nq *nq;
1316
1317		nq = &rdev->nq[i];
1318		nq->hwq.max_elements = BNXT_QPLIB_NQE_MAX_CNT;
1319		rc = bnxt_qplib_alloc_nq(&rdev->qplib_res, &rdev->nq[i]);
1320		if (rc) {
1321			ibdev_err(&rdev->ibdev, "Alloc Failed NQ%d rc:%#x",
1322				  i, rc);
1323			goto free_nq;
1324		}
1325		type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1326		rattr.dma_arr = nq->hwq.pbl[PBL_LVL_0].pg_map_arr;
1327		rattr.pages = nq->hwq.pbl[rdev->nq[i].hwq.level].pg_count;
1328		rattr.type = type;
1329		rattr.mode = RING_ALLOC_REQ_INT_MODE_MSIX;
1330		rattr.depth = BNXT_QPLIB_NQE_MAX_CNT - 1;
1331		rattr.lrid = rdev->en_dev->msix_entries[i + 1].ring_idx;
1332		rc = bnxt_re_net_ring_alloc(rdev, &rattr, &nq->ring_id);
1333		if (rc) {
1334			ibdev_err(&rdev->ibdev,
1335				  "Failed to allocate NQ fw id with rc = 0x%x",
1336				  rc);
1337			bnxt_qplib_free_nq(&rdev->nq[i]);
1338			goto free_nq;
1339		}
1340		num_vec_created++;
1341	}
1342	return 0;
1343free_nq:
1344	for (i = num_vec_created - 1; i >= 0; i--) {
1345		type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1346		bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, type);
1347		bnxt_qplib_free_nq(&rdev->nq[i]);
1348	}
1349	bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
 
1350			       &rdev->dpi_privileged);
1351dealloc_res:
1352	bnxt_qplib_free_res(&rdev->qplib_res);
1353
1354fail:
1355	rdev->qplib_res.rcfw = NULL;
1356	return rc;
1357}
1358
1359static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
1360				   u8 port_num, enum ib_event_type event)
1361{
1362	struct ib_event ib_event;
1363
1364	ib_event.device = ibdev;
1365	if (qp) {
1366		ib_event.element.qp = qp;
1367		ib_event.event = event;
1368		if (qp->event_handler)
1369			qp->event_handler(&ib_event, qp->qp_context);
1370
1371	} else {
1372		ib_event.element.port_num = port_num;
1373		ib_event.event = event;
1374		ib_dispatch_event(&ib_event);
1375	}
1376}
1377
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1378static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
1379					struct bnxt_re_qp *qp)
1380{
1381	return (qp->ib_qp.qp_type == IB_QPT_GSI) ||
1382	       (qp == rdev->gsi_ctx.gsi_sqp);
1383}
1384
1385static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
1386{
1387	int mask = IB_QP_STATE;
1388	struct ib_qp_attr qp_attr;
1389	struct bnxt_re_qp *qp;
1390
1391	qp_attr.qp_state = IB_QPS_ERR;
1392	mutex_lock(&rdev->qp_lock);
1393	list_for_each_entry(qp, &rdev->qp_list, list) {
1394		/* Modify the state of all QPs except QP1/Shadow QP */
1395		if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
1396			if (qp->qplib_qp.state !=
1397			    CMDQ_MODIFY_QP_NEW_STATE_RESET &&
1398			    qp->qplib_qp.state !=
1399			    CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1400				bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
1401						       1, IB_EVENT_QP_FATAL);
1402				bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
1403						  NULL);
1404			}
1405		}
1406	}
1407	mutex_unlock(&rdev->qp_lock);
1408}
1409
1410static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
1411{
1412	struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
1413	struct bnxt_qplib_gid gid;
1414	u16 gid_idx, index;
1415	int rc = 0;
1416
1417	if (!ib_device_try_get(&rdev->ibdev))
1418		return 0;
1419
 
 
 
 
 
 
1420	for (index = 0; index < sgid_tbl->active; index++) {
1421		gid_idx = sgid_tbl->hw_id[index];
1422
1423		if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
1424			    sizeof(bnxt_qplib_gid_zero)))
1425			continue;
1426		/* need to modify the VLAN enable setting of non VLAN GID only
1427		 * as setting is done for VLAN GID while adding GID
1428		 */
1429		if (sgid_tbl->vlan[index])
1430			continue;
1431
1432		memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
1433
1434		rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
1435					    rdev->qplib_res.netdev->dev_addr);
1436	}
1437
1438	ib_device_put(&rdev->ibdev);
1439	return rc;
1440}
1441
1442static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
1443{
1444	u32 prio_map = 0, tmp_map = 0;
1445	struct net_device *netdev;
1446	struct dcb_app app = {};
1447
1448	netdev = rdev->netdev;
1449
 
1450	app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
1451	app.protocol = ETH_P_IBOE;
1452	tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1453	prio_map = tmp_map;
1454
1455	app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
1456	app.protocol = ROCE_V2_UDP_DPORT;
1457	tmp_map = dcb_ieee_getapp_mask(netdev, &app);
1458	prio_map |= tmp_map;
1459
1460	return prio_map;
1461}
1462
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1463static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
1464{
1465	u8 prio_map = 0;
 
 
1466
1467	/* Get priority for roce */
1468	prio_map = bnxt_re_get_priority_mask(rdev);
1469
1470	if (prio_map == rdev->cur_prio_map)
1471		return 0;
1472	rdev->cur_prio_map = prio_map;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1473	/* Actual priorities are not programmed as they are already
1474	 * done by L2 driver; just enable or disable priority vlan tagging
1475	 */
1476	if ((prio_map == 0 && rdev->qplib_res.prio) ||
1477	    (prio_map != 0 && !rdev->qplib_res.prio)) {
1478		rdev->qplib_res.prio = prio_map;
 
1479		bnxt_re_update_gid(rdev);
1480	}
1481
1482	return 0;
1483}
1484
1485static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev)
1486{
1487	struct bnxt_en_dev *en_dev = rdev->en_dev;
1488	struct hwrm_ver_get_output resp = {};
1489	struct hwrm_ver_get_input req = {};
1490	struct bnxt_qplib_chip_ctx *cctx;
1491	struct bnxt_fw_msg fw_msg = {};
1492	int rc;
1493
1494	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_VER_GET);
 
 
1495	req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
1496	req.hwrm_intf_min = HWRM_VERSION_MINOR;
1497	req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
1498	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
1499			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
1500	rc = bnxt_send_msg(en_dev, &fw_msg);
1501	if (rc) {
1502		ibdev_err(&rdev->ibdev, "Failed to query HW version, rc = 0x%x",
1503			  rc);
1504		return;
1505	}
1506
1507	cctx = rdev->chip_ctx;
1508	cctx->hwrm_intf_ver =
1509		(u64)le16_to_cpu(resp.hwrm_intf_major) << 48 |
1510		(u64)le16_to_cpu(resp.hwrm_intf_minor) << 32 |
1511		(u64)le16_to_cpu(resp.hwrm_intf_build) << 16 |
1512		le16_to_cpu(resp.hwrm_intf_patch);
1513
1514	cctx->hwrm_cmd_max_timeout = le16_to_cpu(resp.max_req_timeout);
1515
1516	if (!cctx->hwrm_cmd_max_timeout)
1517		cctx->hwrm_cmd_max_timeout = RCFW_FW_STALL_MAX_TIMEOUT;
1518}
1519
1520static int bnxt_re_ib_init(struct bnxt_re_dev *rdev)
1521{
1522	int rc;
1523	u32 event;
1524
1525	/* Register ib dev */
1526	rc = bnxt_re_register_ib(rdev);
1527	if (rc) {
1528		pr_err("Failed to register with IB: %#x\n", rc);
1529		return rc;
1530	}
1531	dev_info(rdev_to_dev(rdev), "Device registered with IB successfully");
 
 
1532	set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
1533
1534	event = netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev) ?
1535		IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
1536
1537	bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, event);
1538
1539	return rc;
1540}
1541
1542static void bnxt_re_dev_uninit(struct bnxt_re_dev *rdev)
1543{
1544	u8 type;
1545	int rc;
1546
1547	if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1548		cancel_delayed_work_sync(&rdev->worker);
1549
1550	if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED,
1551			       &rdev->flags))
1552		bnxt_re_cleanup_res(rdev);
1553	if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags))
1554		bnxt_re_free_res(rdev);
1555
1556	if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1557		rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1558		if (rc)
1559			ibdev_warn(&rdev->ibdev,
1560				   "Failed to deinitialize RCFW: %#x", rc);
1561		bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1562		bnxt_qplib_free_ctx(&rdev->qplib_res, &rdev->qplib_ctx);
1563		bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1564		type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1565		bnxt_re_net_ring_free(rdev, rdev->rcfw.creq.ring_id, type);
1566		bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1567	}
1568
1569	rdev->num_msix = 0;
1570
1571	if (rdev->pacing.dbr_pacing)
1572		bnxt_re_deinitialize_dbr_pacing(rdev);
 
1573
1574	bnxt_re_destroy_chip_ctx(rdev);
1575	if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags))
1576		bnxt_unregister_dev(rdev->en_dev);
 
 
 
 
1577}
1578
1579/* worker thread for polling periodic events. Now used for QoS programming*/
1580static void bnxt_re_worker(struct work_struct *work)
1581{
1582	struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1583						worker.work);
1584
1585	bnxt_re_setup_qos(rdev);
1586	schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1587}
1588
1589static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 wqe_mode)
1590{
1591	struct bnxt_re_ring_attr rattr = {};
1592	struct bnxt_qplib_creq_ctx *creq;
 
1593	u32 db_offt;
1594	int vid;
1595	u8 type;
1596	int rc;
1597
1598	/* Registered a new RoCE device instance to netdev */
 
1599	rc = bnxt_re_register_netdev(rdev);
1600	if (rc) {
 
1601		ibdev_err(&rdev->ibdev,
1602			  "Failed to register with netedev: %#x\n", rc);
1603		return -EINVAL;
1604	}
1605	set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1606
1607	rc = bnxt_re_setup_chip_ctx(rdev, wqe_mode);
1608	if (rc) {
1609		bnxt_unregister_dev(rdev->en_dev);
1610		clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1611		ibdev_err(&rdev->ibdev, "Failed to get chip context\n");
1612		return -EINVAL;
1613	}
1614
1615	/* Check whether VF or PF */
1616	bnxt_re_get_sriov_func_type(rdev);
1617
1618	if (!rdev->en_dev->ulp_tbl->msix_requested) {
 
1619		ibdev_err(&rdev->ibdev,
1620			  "Failed to get MSI-X vectors: %#x\n", rc);
1621		rc = -EINVAL;
1622		goto fail;
1623	}
1624	ibdev_dbg(&rdev->ibdev, "Got %d MSI-X vectors\n",
1625		  rdev->en_dev->ulp_tbl->msix_requested);
1626	rdev->num_msix = rdev->en_dev->ulp_tbl->msix_requested;
1627
1628	bnxt_re_query_hwrm_intf_version(rdev);
1629
1630	/* Establish RCFW Communication Channel to initialize the context
1631	 * memory for the function and all child VFs
1632	 */
1633	rc = bnxt_qplib_alloc_rcfw_channel(&rdev->qplib_res, &rdev->rcfw,
1634					   &rdev->qplib_ctx,
1635					   BNXT_RE_MAX_QPC_COUNT);
1636	if (rc) {
1637		ibdev_err(&rdev->ibdev,
1638			  "Failed to allocate RCFW Channel: %#x\n", rc);
1639		goto fail;
1640	}
1641
1642	type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1643	creq = &rdev->rcfw.creq;
1644	rattr.dma_arr = creq->hwq.pbl[PBL_LVL_0].pg_map_arr;
1645	rattr.pages = creq->hwq.pbl[creq->hwq.level].pg_count;
1646	rattr.type = type;
1647	rattr.mode = RING_ALLOC_REQ_INT_MODE_MSIX;
1648	rattr.depth = BNXT_QPLIB_CREQE_MAX_CNT - 1;
1649	rattr.lrid = rdev->en_dev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx;
1650	rc = bnxt_re_net_ring_alloc(rdev, &rattr, &creq->ring_id);
1651	if (rc) {
1652		ibdev_err(&rdev->ibdev, "Failed to allocate CREQ: %#x\n", rc);
1653		goto free_rcfw;
1654	}
1655	db_offt = rdev->en_dev->msix_entries[BNXT_RE_AEQ_IDX].db_offset;
1656	vid = rdev->en_dev->msix_entries[BNXT_RE_AEQ_IDX].vector;
1657	rc = bnxt_qplib_enable_rcfw_channel(&rdev->rcfw,
1658					    vid, db_offt,
1659					    &bnxt_re_aeq_handler);
1660	if (rc) {
1661		ibdev_err(&rdev->ibdev, "Failed to enable RCFW channel: %#x\n",
1662			  rc);
1663		goto free_ring;
1664	}
1665
1666	if (bnxt_qplib_dbr_pacing_en(rdev->chip_ctx)) {
1667		rc = bnxt_re_initialize_dbr_pacing(rdev);
1668		if (!rc) {
1669			rdev->pacing.dbr_pacing = true;
1670		} else {
1671			ibdev_err(&rdev->ibdev,
1672				  "DBR pacing disabled with error : %d\n", rc);
1673			rdev->pacing.dbr_pacing = false;
1674		}
1675	}
1676	rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1677	if (rc)
1678		goto disable_rcfw;
1679
1680	bnxt_re_set_resource_limits(rdev);
1681
1682	rc = bnxt_qplib_alloc_ctx(&rdev->qplib_res, &rdev->qplib_ctx, 0,
1683				  bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx));
1684	if (rc) {
1685		ibdev_err(&rdev->ibdev,
1686			  "Failed to allocate QPLIB context: %#x\n", rc);
1687		goto disable_rcfw;
1688	}
1689	rc = bnxt_re_net_stats_ctx_alloc(rdev,
1690					 rdev->qplib_ctx.stats.dma_map,
1691					 &rdev->qplib_ctx.stats.fw_id);
1692	if (rc) {
1693		ibdev_err(&rdev->ibdev,
1694			  "Failed to allocate stats context: %#x\n", rc);
1695		goto free_ctx;
1696	}
1697
1698	rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
1699				  rdev->is_virtfn);
1700	if (rc) {
1701		ibdev_err(&rdev->ibdev,
1702			  "Failed to initialize RCFW: %#x\n", rc);
1703		goto free_sctx;
1704	}
1705	set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1706
1707	/* Resources based on the 'new' device caps */
1708	rc = bnxt_re_alloc_res(rdev);
1709	if (rc) {
1710		ibdev_err(&rdev->ibdev,
1711			  "Failed to allocate resources: %#x\n", rc);
1712		goto fail;
1713	}
1714	set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags);
1715	rc = bnxt_re_init_res(rdev);
1716	if (rc) {
1717		ibdev_err(&rdev->ibdev,
1718			  "Failed to initialize resources: %#x\n", rc);
1719		goto fail;
1720	}
1721
1722	set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags);
1723
1724	if (!rdev->is_virtfn) {
1725		rc = bnxt_re_setup_qos(rdev);
1726		if (rc)
1727			ibdev_info(&rdev->ibdev,
1728				   "RoCE priority not yet configured\n");
1729
1730		INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1731		set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1732		schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1733		/*
1734		 * Use the total VF count since the actual VF count may not be
1735		 * available at this point.
1736		 */
1737		bnxt_re_vf_res_config(rdev);
1738	}
1739	hash_init(rdev->cq_hash);
1740
1741	return 0;
1742free_sctx:
1743	bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1744free_ctx:
1745	bnxt_qplib_free_ctx(&rdev->qplib_res, &rdev->qplib_ctx);
1746disable_rcfw:
1747	bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1748free_ring:
1749	type = bnxt_qplib_get_ring_type(rdev->chip_ctx);
1750	bnxt_re_net_ring_free(rdev, rdev->rcfw.creq.ring_id, type);
1751free_rcfw:
1752	bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1753fail:
1754	bnxt_re_dev_uninit(rdev);
1755
1756	return rc;
1757}
1758
1759static int bnxt_re_add_device(struct auxiliary_device *adev, u8 wqe_mode)
 
 
 
 
 
 
 
 
 
 
 
1760{
1761	struct bnxt_aux_priv *aux_priv =
1762		container_of(adev, struct bnxt_aux_priv, aux_dev);
1763	struct bnxt_en_dev *en_dev;
1764	struct bnxt_re_dev *rdev;
1765	int rc;
1766
1767	/* en_dev should never be NULL as long as adev and aux_dev are valid. */
1768	en_dev = aux_priv->edev;
1769
1770	rdev = bnxt_re_dev_add(aux_priv, en_dev);
1771	if (!rdev || !rdev_to_dev(rdev)) {
 
 
 
 
 
 
 
 
1772		rc = -ENOMEM;
 
1773		goto exit;
1774	}
 
 
 
1775
1776	rc = bnxt_re_dev_init(rdev, wqe_mode);
1777	if (rc)
1778		goto re_dev_dealloc;
 
 
 
1779
1780	rc = bnxt_re_ib_init(rdev);
 
 
 
 
 
 
 
1781	if (rc) {
1782		pr_err("Failed to register with IB: %s",
1783			aux_priv->aux_dev.name);
1784		goto re_dev_uninit;
1785	}
1786	auxiliary_set_drvdata(adev, rdev);
1787
1788	return 0;
 
 
 
 
 
1789
1790re_dev_uninit:
1791	bnxt_re_dev_uninit(rdev);
1792re_dev_dealloc:
1793	ib_dealloc_device(&rdev->ibdev);
1794exit:
1795	return rc;
1796}
1797
1798static void bnxt_re_setup_cc(struct bnxt_re_dev *rdev, bool enable)
1799{
1800	struct bnxt_qplib_cc_param cc_param = {};
 
1801
1802	/* Do not enable congestion control on VFs */
1803	if (rdev->is_virtfn)
1804		return;
1805
1806	/* Currently enabling only for GenP5 adapters */
1807	if (!bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
1808		return;
 
1809
1810	if (enable) {
1811		cc_param.enable  = 1;
1812		cc_param.cc_mode = CMDQ_MODIFY_ROCE_CC_CC_MODE_PROBABILISTIC_CC_MODE;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1813	}
1814
1815	cc_param.mask = (CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_CC_MODE |
1816			 CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_ENABLE_CC |
1817			 CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_TOS_ECN);
1818
1819	if (bnxt_qplib_modify_cc(&rdev->qplib_res, &cc_param))
1820		ibdev_err(&rdev->ibdev, "Failed to setup CC enable = %d\n", enable);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1821}
1822
1823/*
1824 * "Notifier chain callback can be invoked for the same chain from
1825 * different CPUs at the same time".
1826 *
1827 * For cases when the netdev is already present, our call to the
1828 * register_netdevice_notifier() will actually get the rtnl_lock()
1829 * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1830 * events.
1831 *
1832 * But for cases when the netdev is not already present, the notifier
1833 * chain is subjected to be invoked from different CPUs simultaneously.
1834 *
1835 * This is protected by the netdev_mutex.
1836 */
1837static int bnxt_re_netdev_event(struct notifier_block *notifier,
1838				unsigned long event, void *ptr)
1839{
1840	struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
 
1841	struct bnxt_re_dev *rdev;
 
 
 
1842
1843	real_dev = rdma_vlan_dev_real_dev(netdev);
1844	if (!real_dev)
1845		real_dev = netdev;
1846
1847	if (real_dev != netdev)
1848		goto exit;
1849
1850	rdev = bnxt_re_from_netdev(real_dev);
1851	if (!rdev)
1852		return NOTIFY_DONE;
1853
 
 
1854
1855	switch (event) {
1856	case NETDEV_UP:
1857	case NETDEV_DOWN:
1858	case NETDEV_CHANGE:
1859		bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1860					netif_carrier_ok(real_dev) ?
1861					IB_EVENT_PORT_ACTIVE :
1862					IB_EVENT_PORT_ERR);
 
 
 
 
 
1863		break;
 
1864	default:
 
1865		break;
1866	}
1867	ib_device_put(&rdev->ibdev);
 
 
 
 
 
 
 
 
 
 
 
 
 
1868exit:
 
 
1869	return NOTIFY_DONE;
1870}
1871
1872#define BNXT_ADEV_NAME "bnxt_en"
 
 
1873
1874static void bnxt_re_remove(struct auxiliary_device *adev)
1875{
1876	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
1877
1878	if (!rdev)
1879		return;
1880
1881	mutex_lock(&bnxt_re_mutex);
1882	if (rdev->nb.notifier_call) {
1883		unregister_netdevice_notifier(&rdev->nb);
1884		rdev->nb.notifier_call = NULL;
1885	} else {
1886		/* If notifier is null, we should have already done a
1887		 * clean up before coming here.
1888		 */
1889		goto skip_remove;
1890	}
1891	bnxt_re_setup_cc(rdev, false);
1892	ib_unregister_device(&rdev->ibdev);
1893	bnxt_re_dev_uninit(rdev);
1894	ib_dealloc_device(&rdev->ibdev);
1895skip_remove:
1896	mutex_unlock(&bnxt_re_mutex);
1897}
1898
1899static int bnxt_re_probe(struct auxiliary_device *adev,
1900			 const struct auxiliary_device_id *id)
1901{
1902	struct bnxt_re_dev *rdev;
1903	int rc;
1904
1905	mutex_lock(&bnxt_re_mutex);
1906	rc = bnxt_re_add_device(adev, BNXT_QPLIB_WQE_MODE_STATIC);
1907	if (rc) {
1908		mutex_unlock(&bnxt_re_mutex);
1909		return rc;
1910	}
1911
1912	rdev = auxiliary_get_drvdata(adev);
1913
1914	rdev->nb.notifier_call = bnxt_re_netdev_event;
1915	rc = register_netdevice_notifier(&rdev->nb);
1916	if (rc) {
1917		rdev->nb.notifier_call = NULL;
1918		pr_err("%s: Cannot register to netdevice_notifier",
1919		       ROCE_DRV_MODULE_NAME);
1920		goto err;
1921	}
1922
1923	bnxt_re_setup_cc(rdev, true);
1924	mutex_unlock(&bnxt_re_mutex);
1925	return 0;
1926
1927err:
1928	mutex_unlock(&bnxt_re_mutex);
1929	bnxt_re_remove(adev);
1930
1931	return rc;
1932}
1933
1934static int bnxt_re_suspend(struct auxiliary_device *adev, pm_message_t state)
1935{
1936	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
1937
1938	if (!rdev)
1939		return 0;
1940
1941	mutex_lock(&bnxt_re_mutex);
1942	/* L2 driver may invoke this callback during device error/crash or device
1943	 * reset. Current RoCE driver doesn't recover the device in case of
1944	 * error. Handle the error by dispatching fatal events to all qps
1945	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
1946	 * L2 driver want to modify the MSIx table.
1947	 */
1948
1949	ibdev_info(&rdev->ibdev, "Handle device suspend call");
1950	/* Check the current device state from bnxt_en_dev and move the
1951	 * device to detached state if FW_FATAL_COND is set.
1952	 * This prevents more commands to HW during clean-up,
1953	 * in case the device is already in error.
1954	 */
1955	if (test_bit(BNXT_STATE_FW_FATAL_COND, &rdev->en_dev->en_state))
1956		set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
1957
1958	bnxt_re_dev_stop(rdev);
1959	bnxt_re_stop_irq(rdev);
1960	/* Move the device states to detached and  avoid sending any more
1961	 * commands to HW
1962	 */
1963	set_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags);
1964	set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
1965	wake_up_all(&rdev->rcfw.cmdq.waitq);
1966	mutex_unlock(&bnxt_re_mutex);
1967
1968	return 0;
1969}
1970
1971static int bnxt_re_resume(struct auxiliary_device *adev)
1972{
1973	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
1974
1975	if (!rdev)
1976		return 0;
1977
1978	mutex_lock(&bnxt_re_mutex);
1979	/* L2 driver may invoke this callback during device recovery, resume.
1980	 * reset. Current RoCE driver doesn't recover the device in case of
1981	 * error. Handle the error by dispatching fatal events to all qps
1982	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
1983	 * L2 driver want to modify the MSIx table.
1984	 */
1985
1986	ibdev_info(&rdev->ibdev, "Handle device resume call");
1987	mutex_unlock(&bnxt_re_mutex);
1988
1989	return 0;
1990}
1991
1992static const struct auxiliary_device_id bnxt_re_id_table[] = {
1993	{ .name = BNXT_ADEV_NAME ".rdma", },
1994	{},
1995};
1996
1997MODULE_DEVICE_TABLE(auxiliary, bnxt_re_id_table);
1998
1999static struct auxiliary_driver bnxt_re_driver = {
2000	.name = "rdma",
2001	.probe = bnxt_re_probe,
2002	.remove = bnxt_re_remove,
2003	.shutdown = bnxt_re_shutdown,
2004	.suspend = bnxt_re_suspend,
2005	.resume = bnxt_re_resume,
2006	.id_table = bnxt_re_id_table,
2007};
2008
2009static int __init bnxt_re_mod_init(void)
2010{
2011	int rc;
2012
2013	pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
2014	rc = auxiliary_driver_register(&bnxt_re_driver);
2015	if (rc) {
2016		pr_err("%s: Failed to register auxiliary driver\n",
2017			ROCE_DRV_MODULE_NAME);
2018		return rc;
 
 
 
 
 
2019	}
2020	return 0;
2021}
2022
2023static void __exit bnxt_re_mod_exit(void)
2024{
2025	auxiliary_driver_unregister(&bnxt_re_driver);
2026}
2027
2028module_init(bnxt_re_mod_init);
2029module_exit(bnxt_re_mod_exit);