main.c 43.9 KB
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/*
 * Broadcom NetXtreme-E RoCE driver.
 *
 * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
 * Broadcom refers to Broadcom Limited and/or its subsidiaries.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * BSD license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Description: Main component of the bnxt_re driver
 */

#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <net/dcbnl.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <linux/if_ether.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_addr.h>

#include "bnxt_ulp.h"
#include "roce_hsi.h"
#include "qplib_res.h"
#include "qplib_sp.h"
#include "qplib_fp.h"
#include "qplib_rcfw.h"
#include "bnxt_re.h"
#include "ib_verbs.h"
#include <rdma/bnxt_re-abi.h>
#include "bnxt.h"
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#include "hw_counters.h"

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static char version[] =
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		BNXT_RE_DESC "\n";
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MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>");
MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
MODULE_LICENSE("Dual BSD/GPL");

/* globals */
static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
/* Mutex to protect the list of bnxt_re devices added */
static DEFINE_MUTEX(bnxt_re_dev_lock);
static struct workqueue_struct *bnxt_re_wq;
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static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev);
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/* SR-IOV helper functions */

static void bnxt_re_get_sriov_func_type(struct bnxt_re_dev *rdev)
{
	struct bnxt *bp;

	bp = netdev_priv(rdev->en_dev->net);
	if (BNXT_VF(bp))
		rdev->is_virtfn = 1;
}

/* Set the maximum number of each resource that the driver actually wants
 * to allocate. This may be up to the maximum number the firmware has
 * reserved for the function. The driver may choose to allocate fewer
 * resources than the firmware maximum.
 */
static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
{
	u32 vf_qps = 0, vf_srqs = 0, vf_cqs = 0, vf_mrws = 0, vf_gids = 0;
	u32 i;
	u32 vf_pct;
	u32 num_vfs;
	struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;

	rdev->qplib_ctx.qpc_count = min_t(u32, BNXT_RE_MAX_QPC_COUNT,
					  dev_attr->max_qp);

	rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT_256K;
	/* Use max_mr from fw since max_mrw does not get set */
	rdev->qplib_ctx.mrw_count = min_t(u32, rdev->qplib_ctx.mrw_count,
					  dev_attr->max_mr);
	rdev->qplib_ctx.srqc_count = min_t(u32, BNXT_RE_MAX_SRQC_COUNT,
					   dev_attr->max_srq);
	rdev->qplib_ctx.cq_count = min_t(u32, BNXT_RE_MAX_CQ_COUNT,
					 dev_attr->max_cq);

	for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
		rdev->qplib_ctx.tqm_count[i] =
		rdev->dev_attr.tqm_alloc_reqs[i];

	if (rdev->num_vfs) {
		/*
		 * Reserve a set of resources for the PF. Divide the remaining
		 * resources among the VFs
		 */
		vf_pct = 100 - BNXT_RE_PCT_RSVD_FOR_PF;
		num_vfs = 100 * rdev->num_vfs;
		vf_qps = (rdev->qplib_ctx.qpc_count * vf_pct) / num_vfs;
		vf_srqs = (rdev->qplib_ctx.srqc_count * vf_pct) / num_vfs;
		vf_cqs = (rdev->qplib_ctx.cq_count * vf_pct) / num_vfs;
		/*
		 * The driver allows many more MRs than other resources. If the
		 * firmware does also, then reserve a fixed amount for the PF
		 * and divide the rest among VFs. VFs may use many MRs for NFS
		 * mounts, ISER, NVME applications, etc. If the firmware
		 * severely restricts the number of MRs, then let PF have
		 * half and divide the rest among VFs, as for the other
		 * resource types.
		 */
		if (rdev->qplib_ctx.mrw_count < BNXT_RE_MAX_MRW_COUNT_64K)
			vf_mrws = rdev->qplib_ctx.mrw_count * vf_pct / num_vfs;
		else
			vf_mrws = (rdev->qplib_ctx.mrw_count -
				   BNXT_RE_RESVD_MR_FOR_PF) / rdev->num_vfs;
		vf_gids = BNXT_RE_MAX_GID_PER_VF;
	}
	rdev->qplib_ctx.vf_res.max_mrw_per_vf = vf_mrws;
	rdev->qplib_ctx.vf_res.max_gid_per_vf = vf_gids;
	rdev->qplib_ctx.vf_res.max_qp_per_vf = vf_qps;
	rdev->qplib_ctx.vf_res.max_srq_per_vf = vf_srqs;
	rdev->qplib_ctx.vf_res.max_cq_per_vf = vf_cqs;
}

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/* for handling bnxt_en callbacks later */
static void bnxt_re_stop(void *p)
{
}

static void bnxt_re_start(void *p)
{
}

static void bnxt_re_sriov_config(void *p, int num_vfs)
{
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	struct bnxt_re_dev *rdev = p;

	if (!rdev)
		return;

	rdev->num_vfs = num_vfs;
	bnxt_re_set_resource_limits(rdev);
	bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw,
				      &rdev->qplib_ctx);
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}

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static void bnxt_re_shutdown(void *p)
{
	struct bnxt_re_dev *rdev = p;

	if (!rdev)
		return;

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	bnxt_re_ib_unreg(rdev);
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}

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static void bnxt_re_stop_irq(void *handle)
{
	struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
	struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
	struct bnxt_qplib_nq *nq;
	int indx;

	for (indx = BNXT_RE_NQ_IDX; indx < rdev->num_msix; indx++) {
		nq = &rdev->nq[indx - 1];
		bnxt_qplib_nq_stop_irq(nq, false);
	}

	bnxt_qplib_rcfw_stop_irq(rcfw, false);
}

static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
{
	struct bnxt_re_dev *rdev = (struct bnxt_re_dev *)handle;
	struct bnxt_msix_entry *msix_ent = rdev->msix_entries;
	struct bnxt_qplib_rcfw *rcfw = &rdev->rcfw;
	struct bnxt_qplib_nq *nq;
	int indx, rc;

	if (!ent) {
		/* Not setting the f/w timeout bit in rcfw.
		 * During the driver unload the first command
		 * to f/w will timeout and that will set the
		 * timeout bit.
		 */
		dev_err(rdev_to_dev(rdev), "Failed to re-start IRQs\n");
		return;
	}

	/* Vectors may change after restart, so update with new vectors
	 * in device sctructure.
	 */
	for (indx = 0; indx < rdev->num_msix; indx++)
		rdev->msix_entries[indx].vector = ent[indx].vector;

	bnxt_qplib_rcfw_start_irq(rcfw, msix_ent[BNXT_RE_AEQ_IDX].vector,
				  false);
	for (indx = BNXT_RE_NQ_IDX ; indx < rdev->num_msix; indx++) {
		nq = &rdev->nq[indx - 1];
		rc = bnxt_qplib_nq_start_irq(nq, indx - 1,
					     msix_ent[indx].vector, false);
		if (rc)
			dev_warn(rdev_to_dev(rdev),
				 "Failed to reinit NQ index %d\n", indx - 1);
	}
}

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static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
	.ulp_async_notifier = NULL,
	.ulp_stop = bnxt_re_stop,
	.ulp_start = bnxt_re_start,
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	.ulp_sriov_config = bnxt_re_sriov_config,
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	.ulp_shutdown = bnxt_re_shutdown,
	.ulp_irq_stop = bnxt_re_stop_irq,
	.ulp_irq_restart = bnxt_re_start_irq
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};

/* RoCE -> Net driver */

/* Driver registration routines used to let the networking driver (bnxt_en)
 * to know that the RoCE driver is now installed
 */
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static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev)
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{
	struct bnxt_en_dev *en_dev;
	int rc;

	if (!rdev)
		return -EINVAL;

	en_dev = rdev->en_dev;

	rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
						    BNXT_ROCE_ULP);
	return rc;
}

static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
{
	struct bnxt_en_dev *en_dev;
	int rc = 0;

	if (!rdev)
		return -EINVAL;

	en_dev = rdev->en_dev;

	rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
						  &bnxt_re_ulp_ops, rdev);
	return rc;
}

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static int bnxt_re_free_msix(struct bnxt_re_dev *rdev)
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{
	struct bnxt_en_dev *en_dev;
	int rc;

	if (!rdev)
		return -EINVAL;

	en_dev = rdev->en_dev;


	rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);

	return rc;
}

static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
{
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	int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got;
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	struct bnxt_en_dev *en_dev;

	if (!rdev)
		return -EINVAL;

	en_dev = rdev->en_dev;

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	num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus());

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	num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
							 rdev->msix_entries,
							 num_msix_want);
	if (num_msix_got < BNXT_RE_MIN_MSIX) {
		rc = -EINVAL;
		goto done;
	}
	if (num_msix_got != num_msix_want) {
		dev_warn(rdev_to_dev(rdev),
			 "Requested %d MSI-X vectors, got %d\n",
			 num_msix_want, num_msix_got);
	}
	rdev->num_msix = num_msix_got;
done:
	return rc;
}

static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
				  u16 opcd, u16 crid, u16 trid)
{
	hdr->req_type = cpu_to_le16(opcd);
	hdr->cmpl_ring = cpu_to_le16(crid);
	hdr->target_id = cpu_to_le16(trid);
}

static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
				int msg_len, void *resp, int resp_max_len,
				int timeout)
{
	fw_msg->msg = msg;
	fw_msg->msg_len = msg_len;
	fw_msg->resp = resp;
	fw_msg->resp_max_len = resp_max_len;
	fw_msg->timeout = timeout;
}

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static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id)
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{
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct hwrm_ring_free_input req = {0};
	struct hwrm_ring_free_output resp;
	struct bnxt_fw_msg fw_msg;
	int rc = -EINVAL;

	if (!en_dev)
		return rc;

	memset(&fw_msg, 0, sizeof(fw_msg));

	bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
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	req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
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	req.ring_id = cpu_to_le16(fw_ring_id);
	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (rc)
		dev_err(rdev_to_dev(rdev),
			"Failed to free HW ring:%d :%#x", req.ring_id, rc);
	return rc;
}

static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
				  int pages, int type, u32 ring_mask,
				  u32 map_index, u16 *fw_ring_id)
{
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct hwrm_ring_alloc_input req = {0};
	struct hwrm_ring_alloc_output resp;
	struct bnxt_fw_msg fw_msg;
	int rc = -EINVAL;

	if (!en_dev)
		return rc;

	memset(&fw_msg, 0, sizeof(fw_msg));
	bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
	req.enables = 0;
	req.page_tbl_addr =  cpu_to_le64(dma_arr[0]);
	if (pages > 1) {
		/* Page size is in log2 units */
		req.page_size = BNXT_PAGE_SHIFT;
		req.page_tbl_depth = 1;
	}
	req.fbo = 0;
	/* Association of ring index with doorbell index and MSIX number */
	req.logical_id = cpu_to_le16(map_index);
	req.length = cpu_to_le32(ring_mask + 1);
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	req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
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	req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (!rc)
		*fw_ring_id = le16_to_cpu(resp.ring_id);

	return rc;
}

static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
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				      u32 fw_stats_ctx_id)
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{
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct hwrm_stat_ctx_free_input req = {0};
	struct bnxt_fw_msg fw_msg;
	int rc = -EINVAL;

	if (!en_dev)
		return rc;

	memset(&fw_msg, 0, sizeof(fw_msg));

	bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
	req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
			    sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (rc)
		dev_err(rdev_to_dev(rdev),
			"Failed to free HW stats context %#x", rc);

	return rc;
}

static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
				       dma_addr_t dma_map,
				       u32 *fw_stats_ctx_id)
{
	struct hwrm_stat_ctx_alloc_output resp = {0};
	struct hwrm_stat_ctx_alloc_input req = {0};
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct bnxt_fw_msg fw_msg;
	int rc = -EINVAL;

	*fw_stats_ctx_id = INVALID_STATS_CTX_ID;

	if (!en_dev)
		return rc;

	memset(&fw_msg, 0, sizeof(fw_msg));

	bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
	req.update_period_ms = cpu_to_le32(1000);
	req.stats_dma_addr = cpu_to_le64(dma_map);
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	req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
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	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (!rc)
		*fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);

	return rc;
}

/* Device */

static bool is_bnxt_re_dev(struct net_device *netdev)
{
	struct ethtool_drvinfo drvinfo;

	if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
		memset(&drvinfo, 0, sizeof(drvinfo));
		netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);

		if (strcmp(drvinfo.driver, "bnxt_en"))
			return false;
		return true;
	}
	return false;
}

static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
{
	struct bnxt_re_dev *rdev;

	rcu_read_lock();
	list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
		if (rdev->netdev == netdev) {
			rcu_read_unlock();
			return rdev;
		}
	}
	rcu_read_unlock();
	return NULL;
}

static void bnxt_re_dev_unprobe(struct net_device *netdev,
				struct bnxt_en_dev *en_dev)
{
	dev_put(netdev);
	module_put(en_dev->pdev->driver->driver.owner);
}

static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
{
	struct bnxt *bp = netdev_priv(netdev);
	struct bnxt_en_dev *en_dev;
	struct pci_dev *pdev;

	/* Call bnxt_en's RoCE probe via indirect API */
	if (!bp->ulp_probe)
		return ERR_PTR(-EINVAL);

	en_dev = bp->ulp_probe(netdev);
	if (IS_ERR(en_dev))
		return en_dev;

	pdev = en_dev->pdev;
	if (!pdev)
		return ERR_PTR(-EINVAL);

	if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
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		dev_info(&pdev->dev,
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			"%s: probe error: RoCE is not supported on this device",
			ROCE_DRV_MODULE_NAME);
		return ERR_PTR(-ENODEV);
	}

	/* Bump net device reference count */
	if (!try_module_get(pdev->driver->driver.owner))
		return ERR_PTR(-ENODEV);

	dev_hold(netdev);

	return en_dev;
}

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static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
			   char *buf)
{
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	struct bnxt_re_dev *rdev =
		rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
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	return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
}
static DEVICE_ATTR_RO(hw_rev);

static ssize_t hca_type_show(struct device *device,
			     struct device_attribute *attr, char *buf)
{
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	struct bnxt_re_dev *rdev =
		rdma_device_to_drv_device(device, struct bnxt_re_dev, ibdev);
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	return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
}
static DEVICE_ATTR_RO(hca_type);

static struct attribute *bnxt_re_attributes[] = {
	&dev_attr_hw_rev.attr,
	&dev_attr_hca_type.attr,
	NULL
};

static const struct attribute_group bnxt_re_dev_attr_group = {
	.attrs = bnxt_re_attributes,
};

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static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
{
	ib_unregister_device(&rdev->ibdev);
}

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static const struct ib_device_ops bnxt_re_dev_ops = {
	.add_gid = bnxt_re_add_gid,
	.alloc_hw_stats = bnxt_re_ib_alloc_hw_stats,
	.alloc_mr = bnxt_re_alloc_mr,
	.alloc_pd = bnxt_re_alloc_pd,
	.alloc_ucontext = bnxt_re_alloc_ucontext,
	.create_ah = bnxt_re_create_ah,
	.create_cq = bnxt_re_create_cq,
	.create_qp = bnxt_re_create_qp,
	.create_srq = bnxt_re_create_srq,
	.dealloc_pd = bnxt_re_dealloc_pd,
	.dealloc_ucontext = bnxt_re_dealloc_ucontext,
	.del_gid = bnxt_re_del_gid,
	.dereg_mr = bnxt_re_dereg_mr,
	.destroy_ah = bnxt_re_destroy_ah,
	.destroy_cq = bnxt_re_destroy_cq,
	.destroy_qp = bnxt_re_destroy_qp,
	.destroy_srq = bnxt_re_destroy_srq,
	.get_dev_fw_str = bnxt_re_query_fw_str,
	.get_dma_mr = bnxt_re_get_dma_mr,
	.get_hw_stats = bnxt_re_ib_get_hw_stats,
	.get_link_layer = bnxt_re_get_link_layer,
	.get_netdev = bnxt_re_get_netdev,
	.get_port_immutable = bnxt_re_get_port_immutable,
	.map_mr_sg = bnxt_re_map_mr_sg,
	.mmap = bnxt_re_mmap,
	.modify_ah = bnxt_re_modify_ah,
	.modify_device = bnxt_re_modify_device,
	.modify_qp = bnxt_re_modify_qp,
	.modify_srq = bnxt_re_modify_srq,
	.poll_cq = bnxt_re_poll_cq,
	.post_recv = bnxt_re_post_recv,
	.post_send = bnxt_re_post_send,
	.post_srq_recv = bnxt_re_post_srq_recv,
	.query_ah = bnxt_re_query_ah,
	.query_device = bnxt_re_query_device,
	.query_pkey = bnxt_re_query_pkey,
	.query_port = bnxt_re_query_port,
	.query_qp = bnxt_re_query_qp,
	.query_srq = bnxt_re_query_srq,
	.reg_user_mr = bnxt_re_reg_user_mr,
	.req_notify_cq = bnxt_re_req_notify_cq,
};

617 618 619 620 621 622 623 624 625 626 627 628 629 630
static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
{
	struct ib_device *ibdev = &rdev->ibdev;

	/* ib device init */
	ibdev->owner = THIS_MODULE;
	ibdev->node_type = RDMA_NODE_IB_CA;
	strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
		strlen(BNXT_RE_DESC) + 5);
	ibdev->phys_port_cnt = 1;

	bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);

	ibdev->num_comp_vectors	= 1;
631
	ibdev->dev.parent = &rdev->en_dev->pdev->dev;
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
	ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;

	/* User space */
	ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
	ibdev->uverbs_cmd_mask =
			(1ull << IB_USER_VERBS_CMD_GET_CONTEXT)		|
			(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)	|
			(1ull << IB_USER_VERBS_CMD_QUERY_PORT)		|
			(1ull << IB_USER_VERBS_CMD_ALLOC_PD)		|
			(1ull << IB_USER_VERBS_CMD_DEALLOC_PD)		|
			(1ull << IB_USER_VERBS_CMD_REG_MR)		|
			(1ull << IB_USER_VERBS_CMD_REREG_MR)		|
			(1ull << IB_USER_VERBS_CMD_DEREG_MR)		|
			(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
			(1ull << IB_USER_VERBS_CMD_CREATE_CQ)		|
			(1ull << IB_USER_VERBS_CMD_RESIZE_CQ)		|
			(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)		|
			(1ull << IB_USER_VERBS_CMD_CREATE_QP)		|
			(1ull << IB_USER_VERBS_CMD_MODIFY_QP)		|
			(1ull << IB_USER_VERBS_CMD_QUERY_QP)		|
			(1ull << IB_USER_VERBS_CMD_DESTROY_QP)		|
			(1ull << IB_USER_VERBS_CMD_CREATE_SRQ)		|
			(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)		|
			(1ull << IB_USER_VERBS_CMD_QUERY_SRQ)		|
			(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)		|
			(1ull << IB_USER_VERBS_CMD_CREATE_AH)		|
			(1ull << IB_USER_VERBS_CMD_MODIFY_AH)		|
			(1ull << IB_USER_VERBS_CMD_QUERY_AH)		|
			(1ull << IB_USER_VERBS_CMD_DESTROY_AH);
	/* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */


664
	rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group);
665
	ibdev->driver_id = RDMA_DRIVER_BNXT_RE;
666
	ib_set_device_ops(ibdev, &bnxt_re_dev_ops);
667
	return ib_register_device(ibdev, "bnxt_re%d");
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
}

static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
{
	dev_put(rdev->netdev);
	rdev->netdev = NULL;

	mutex_lock(&bnxt_re_dev_lock);
	list_del_rcu(&rdev->list);
	mutex_unlock(&bnxt_re_dev_lock);

	synchronize_rcu();

	ib_dealloc_device(&rdev->ibdev);
	/* rdev is gone */
}

static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
					   struct bnxt_en_dev *en_dev)
{
	struct bnxt_re_dev *rdev;

	/* Allocate bnxt_re_dev instance here */
691
	rdev = ib_alloc_device(bnxt_re_dev, ibdev);
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
	if (!rdev) {
		dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
			ROCE_DRV_MODULE_NAME);
		return NULL;
	}
	/* Default values */
	rdev->netdev = netdev;
	dev_hold(rdev->netdev);
	rdev->en_dev = en_dev;
	rdev->id = rdev->en_dev->pdev->devfn;
	INIT_LIST_HEAD(&rdev->qp_list);
	mutex_init(&rdev->qp_lock);
	atomic_set(&rdev->qp_count, 0);
	atomic_set(&rdev->cq_count, 0);
	atomic_set(&rdev->srq_count, 0);
	atomic_set(&rdev->mr_count, 0);
	atomic_set(&rdev->mw_count, 0);
	rdev->cosq[0] = 0xFFFF;
	rdev->cosq[1] = 0xFFFF;

	mutex_lock(&bnxt_re_dev_lock);
	list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
	mutex_unlock(&bnxt_re_dev_lock);
	return rdev;
}

718 719
static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
					     *unaffi_async)
720
{
721
	switch (unaffi_async->event) {
722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
	case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
		break;
	case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

750 751 752 753
static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
					 struct bnxt_re_qp *qp)
{
	struct ib_event event;
754 755 756 757 758 759 760
	unsigned int flags;

	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
		flags = bnxt_re_lock_cqs(qp);
		bnxt_qplib_add_flush_qp(&qp->qplib_qp);
		bnxt_re_unlock_cqs(qp, flags);
	}
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843

	memset(&event, 0, sizeof(event));
	if (qp->qplib_qp.srq) {
		event.device = &qp->rdev->ibdev;
		event.element.qp = &qp->ib_qp;
		event.event = IB_EVENT_QP_LAST_WQE_REACHED;
	}

	if (event.device && qp->ib_qp.event_handler)
		qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);

	return 0;
}

static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
					   void *obj)
{
	int rc = 0;
	u8 event;

	if (!obj)
		return rc; /* QP was already dead, still return success */

	event = affi_async->event;
	if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) {
		struct bnxt_qplib_qp *lib_qp = obj;
		struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp,
						     qplib_qp);
		rc = bnxt_re_handle_qp_async_event(affi_async, qp);
	}
	return rc;
}

static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
			       void *aeqe, void *obj)
{
	struct creq_qp_event *affi_async;
	struct creq_func_event *unaffi_async;
	u8 type;
	int rc;

	type = ((struct creq_base *)aeqe)->type;
	if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
		unaffi_async = aeqe;
		rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
	} else {
		affi_async = aeqe;
		rc = bnxt_re_handle_affi_async_event(affi_async, obj);
	}

	return rc;
}

static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
				struct bnxt_qplib_srq *handle, u8 event)
{
	struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
					       qplib_srq);
	struct ib_event ib_event;
	int rc = 0;

	if (!srq) {
		dev_err(NULL, "%s: SRQ is NULL, SRQN not handled",
			ROCE_DRV_MODULE_NAME);
		rc = -EINVAL;
		goto done;
	}
	ib_event.device = &srq->rdev->ibdev;
	ib_event.element.srq = &srq->ib_srq;
	if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
		ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
	else
		ib_event.event = IB_EVENT_SRQ_ERR;

	if (srq->ib_srq.event_handler) {
		/* Lock event_handler? */
		(*srq->ib_srq.event_handler)(&ib_event,
					     srq->ib_srq.srq_context);
	}
done:
	return rc;
}

844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
			       struct bnxt_qplib_cq *handle)
{
	struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
					     qplib_cq);

	if (!cq) {
		dev_err(NULL, "%s: CQ is NULL, CQN not handled",
			ROCE_DRV_MODULE_NAME);
		return -EINVAL;
	}
	if (cq->ib_cq.comp_handler) {
		/* Lock comp_handler? */
		(*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
	}

	return 0;
}

static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
{
865 866
	int i;

867 868
	for (i = 1; i < rdev->num_msix; i++)
		bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
869 870 871 872 873 874 875

	if (rdev->qplib_res.rcfw)
		bnxt_qplib_cleanup_res(&rdev->qplib_res);
}

static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
{
876
	int rc = 0, i;
877
	int num_vec_enabled = 0;
878 879 880

	bnxt_qplib_init_res(&rdev->qplib_res);

881 882 883 884
	for (i = 1; i < rdev->num_msix ; i++) {
		rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
					  i - 1, rdev->msix_entries[i].vector,
					  rdev->msix_entries[i].db_offset,
885 886
					  &bnxt_re_cqn_handler,
					  &bnxt_re_srqn_handler);
887

888 889 890 891 892
		if (rc) {
			dev_err(rdev_to_dev(rdev),
				"Failed to enable NQ with rc = 0x%x", rc);
			goto fail;
		}
893
		num_vec_enabled++;
894 895 896
	}
	return 0;
fail:
897 898 899
	for (i = num_vec_enabled; i >= 0; i--)
		bnxt_qplib_disable_nq(&rdev->nq[i]);

900 901
	return rc;
}
902

903
static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev)
904 905
{
	int i;
906

907
	for (i = 0; i < rdev->num_msix - 1; i++) {
908
		bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
909 910
		bnxt_qplib_free_nq(&rdev->nq[i]);
	}
911 912
}

913
static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
914
{
915
	bnxt_re_free_nq_res(rdev);
916

917 918 919 920 921 922 923 924 925 926 927 928 929
	if (rdev->qplib_res.dpi_tbl.max) {
		bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
				       &rdev->qplib_res.dpi_tbl,
				       &rdev->dpi_privileged);
	}
	if (rdev->qplib_res.rcfw) {
		bnxt_qplib_free_res(&rdev->qplib_res);
		rdev->qplib_res.rcfw = NULL;
	}
}

static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
{
930
	int rc = 0, i;
931
	int num_vec_created = 0;
932 933 934

	/* Configure and allocate resources for qplib */
	rdev->qplib_res.rcfw = &rdev->rcfw;
935 936
	rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
				     rdev->is_virtfn);
937 938 939 940 941 942 943 944 945 946 947 948
	if (rc)
		goto fail;

	rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
				  rdev->netdev, &rdev->dev_attr);
	if (rc)
		goto fail;

	rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
				  &rdev->dpi_privileged,
				  rdev);
	if (rc)
949 950 951 952 953 954 955 956 957
		goto dealloc_res;

	for (i = 0; i < rdev->num_msix - 1; i++) {
		rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
			BNXT_RE_MAX_SRQC_COUNT + 2;
		rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]);
		if (rc) {
			dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x",
				i, rc);
958
			goto free_nq;
959 960 961 962 963 964 965 966 967 968 969 970
		}
		rc = bnxt_re_net_ring_alloc
			(rdev, rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr,
			 rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count,
			 HWRM_RING_ALLOC_CMPL,
			 BNXT_QPLIB_NQE_MAX_CNT - 1,
			 rdev->msix_entries[i + 1].ring_idx,
			 &rdev->nq[i].ring_id);
		if (rc) {
			dev_err(rdev_to_dev(rdev),
				"Failed to allocate NQ fw id with rc = 0x%x",
				rc);
971
			bnxt_qplib_free_nq(&rdev->nq[i]);
972 973
			goto free_nq;
		}
974
		num_vec_created++;
975 976 977
	}
	return 0;
free_nq:
978 979
	for (i = num_vec_created; i >= 0; i--) {
		bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id);
980
		bnxt_qplib_free_nq(&rdev->nq[i]);
981
	}
982 983 984 985 986 987
	bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
			       &rdev->qplib_res.dpi_tbl,
			       &rdev->dpi_privileged);
dealloc_res:
	bnxt_qplib_free_res(&rdev->qplib_res);

988 989 990 991 992 993 994 995 996 997 998
fail:
	rdev->qplib_res.rcfw = NULL;
	return rc;
}

static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
				   u8 port_num, enum ib_event_type event)
{
	struct ib_event ib_event;

	ib_event.device = ibdev;
999
	if (qp) {
1000
		ib_event.element.qp = qp;
1001 1002 1003 1004 1005
		ib_event.event = event;
		if (qp->event_handler)
			qp->event_handler(&ib_event, qp->qp_context);

	} else {
1006
		ib_event.element.port_num = port_num;
1007 1008 1009
		ib_event.event = event;
		ib_dispatch_event(&ib_event);
	}
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
}

#define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN      0x02
static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
				      u64 *cid_map)
{
	struct hwrm_queue_pri2cos_qcfg_input req = {0};
	struct bnxt *bp = netdev_priv(rdev->netdev);
	struct hwrm_queue_pri2cos_qcfg_output resp;
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct bnxt_fw_msg fw_msg;
	u32 flags = 0;
	u8 *qcfgmap, *tmp_map;
	int rc = 0, i;

	if (!cid_map)
		return -EINVAL;

	memset(&fw_msg, 0, sizeof(fw_msg));
	bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
			      HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
	flags |= (dir & 0x01);
	flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
	req.flags = cpu_to_le32(flags);
	req.port_id = bp->pf.port_id;

	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (rc)
		return rc;

	if (resp.queue_cfg_info) {
		dev_warn(rdev_to_dev(rdev),
			 "Asymmetric cos queue configuration detected");
		dev_warn(rdev_to_dev(rdev),
			 " on device, QoS may not be fully functional\n");
	}
	qcfgmap = &resp.pri0_cos_queue_id;
	tmp_map = (u8 *)cid_map;
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
		tmp_map[i] = qcfgmap[i];

	return rc;
}

static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
					struct bnxt_re_qp *qp)
{
	return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
}

static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
{
	int mask = IB_QP_STATE;
	struct ib_qp_attr qp_attr;
	struct bnxt_re_qp *qp;

	qp_attr.qp_state = IB_QPS_ERR;
	mutex_lock(&rdev->qp_lock);
	list_for_each_entry(qp, &rdev->qp_list, list) {
		/* Modify the state of all QPs except QP1/Shadow QP */
		if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
			if (qp->qplib_qp.state !=
			    CMDQ_MODIFY_QP_NEW_STATE_RESET &&
			    qp->qplib_qp.state !=
			    CMDQ_MODIFY_QP_NEW_STATE_ERR) {
				bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
						       1, IB_EVENT_QP_FATAL);
				bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
						  NULL);
			}
		}
	}
	mutex_unlock(&rdev->qp_lock);
}

1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
{
	struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
	struct bnxt_qplib_gid gid;
	u16 gid_idx, index;
	int rc = 0;

	if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
		return 0;

	if (!sgid_tbl) {
		dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
		return -EINVAL;
	}

	for (index = 0; index < sgid_tbl->active; index++) {
		gid_idx = sgid_tbl->hw_id[index];

		if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
			    sizeof(bnxt_qplib_gid_zero)))
			continue;
		/* need to modify the VLAN enable setting of non VLAN GID only
		 * as setting is done for VLAN GID while adding GID
		 */
		if (sgid_tbl->vlan[index])
			continue;

		memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));

		rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
					    rdev->qplib_res.netdev->dev_addr);
	}

	return rc;
}

1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
{
	u32 prio_map = 0, tmp_map = 0;
	struct net_device *netdev;
	struct dcb_app app;

	netdev = rdev->netdev;

	memset(&app, 0, sizeof(app));
	app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
	app.protocol = ETH_P_IBOE;
	tmp_map = dcb_ieee_getapp_mask(netdev, &app);
	prio_map = tmp_map;

	app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
	app.protocol = ROCE_V2_UDP_DPORT;
	tmp_map = dcb_ieee_getapp_mask(netdev, &app);
	prio_map |= tmp_map;

	return prio_map;
}

static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
{
	u16 prio;
	u8 id;

	for (prio = 0, id = 0; prio < 8; prio++) {
		if (prio_map & (1 << prio)) {
			cosq[id] = cid_map[prio];
			id++;
			if (id == 2) /* Max 2 tcs supported */
				break;
		}
	}
}

static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
{
	u8 prio_map = 0;
	u64 cid_map;
	int rc;

	/* Get priority for roce */
1167
	prio_map = bnxt_re_get_priority_mask(rdev);
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188

	if (prio_map == rdev->cur_prio_map)
		return 0;
	rdev->cur_prio_map = prio_map;
	/* Get cosq id for this priority */
	rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
	if (rc) {
		dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
		return rc;
	}
	/* Parse CoS IDs for app priority */
	bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);

	/* Config BONO. */
	rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
	if (rc) {
		dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
			 rdev->cosq[0], rdev->cosq[1]);
		return rc;
	}

1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
	/* Actual priorities are not programmed as they are already
	 * done by L2 driver; just enable or disable priority vlan tagging
	 */
	if ((prio_map == 0 && rdev->qplib_res.prio) ||
	    (prio_map != 0 && !rdev->qplib_res.prio)) {
		rdev->qplib_res.prio = prio_map ? true : false;

		bnxt_re_update_gid(rdev);
	}

1199 1200 1201
	return 0;
}

1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
static void bnxt_re_query_hwrm_intf_version(struct bnxt_re_dev *rdev)
{
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct hwrm_ver_get_output resp = {0};
	struct hwrm_ver_get_input req = {0};
	struct bnxt_fw_msg fw_msg;
	int rc = 0;

	memset(&fw_msg, 0, sizeof(fw_msg));
	bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
			      HWRM_VER_GET, -1, -1);
	req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
	req.hwrm_intf_min = HWRM_VERSION_MINOR;
	req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
	rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
	if (rc) {
		dev_err(rdev_to_dev(rdev),
			"Failed to query HW version, rc = 0x%x", rc);
		return;
	}
	rdev->qplib_ctx.hwrm_intf_ver =
		(u64)resp.hwrm_intf_major << 48 |
		(u64)resp.hwrm_intf_minor << 32 |
		(u64)resp.hwrm_intf_build << 16 |
		resp.hwrm_intf_patch;
}

1231
static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev)
1232
{
1233
	int rc;
1234 1235 1236 1237 1238 1239

	if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
		/* Cleanup ib dev */
		bnxt_re_unregister_ib(rdev);
	}
	if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
1240
		cancel_delayed_work_sync(&rdev->worker);
1241

1242 1243 1244 1245 1246
	if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED,
			       &rdev->flags))
		bnxt_re_cleanup_res(rdev);
	if (test_and_clear_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags))
		bnxt_re_free_res(rdev);
1247 1248 1249 1250 1251 1252

	if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
		rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
		if (rc)
			dev_warn(rdev_to_dev(rdev),
				 "Failed to deinitialize RCFW: %#x", rc);
1253
		bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1254 1255
		bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
		bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1256
		bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1257 1258 1259
		bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
	}
	if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1260
		rc = bnxt_re_free_msix(rdev);
1261 1262 1263 1264 1265
		if (rc)
			dev_warn(rdev_to_dev(rdev),
				 "Failed to free MSI-X vectors: %#x", rc);
	}
	if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1266
		rc = bnxt_re_unregister_netdev(rdev);
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284
		if (rc)
			dev_warn(rdev_to_dev(rdev),
				 "Failed to unregister with netdev: %#x", rc);
	}
}

/* worker thread for polling periodic events. Now used for QoS programming*/
static void bnxt_re_worker(struct work_struct *work)
{
	struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
						worker.work);

	bnxt_re_setup_qos(rdev);
	schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
}

static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
{
1285
	int rc;
1286

1287 1288 1289 1290 1291 1292
	bool locked;

	/* Acquire rtnl lock through out this function */
	rtnl_lock();
	locked = true;

1293 1294 1295
	/* Registered a new RoCE device instance to netdev */
	rc = bnxt_re_register_netdev(rdev);
	if (rc) {
1296
		rtnl_unlock();
1297 1298 1299 1300 1301
		pr_err("Failed to register with netedev: %#x\n", rc);
		return -EINVAL;
	}
	set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);

1302 1303 1304
	/* Check whether VF or PF */
	bnxt_re_get_sriov_func_type(rdev);

1305 1306 1307 1308 1309 1310 1311 1312
	rc = bnxt_re_request_msix(rdev);
	if (rc) {
		pr_err("Failed to get MSI-X vectors: %#x\n", rc);
		rc = -EINVAL;
		goto fail;
	}
	set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);

1313 1314
	bnxt_re_query_hwrm_intf_version(rdev);

1315 1316 1317
	/* Establish RCFW Communication Channel to initialize the context
	 * memory for the function and all child VFs
	 */
1318
	rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1319
					   &rdev->qplib_ctx,
1320
					   BNXT_RE_MAX_QPC_COUNT);
1321 1322
	if (rc) {
		pr_err("Failed to allocate RCFW Channel: %#x\n", rc);
1323
		goto fail;
1324
	}
1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
	rc = bnxt_re_net_ring_alloc
			(rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
			 rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
			 HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
			 rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
			 &rdev->rcfw.creq_ring_id);
	if (rc) {
		pr_err("Failed to allocate CREQ: %#x\n", rc);
		goto free_rcfw;
	}
	rc = bnxt_qplib_enable_rcfw_channel
				(rdev->en_dev->pdev, &rdev->rcfw,
				 rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
				 rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1339
				 rdev->is_virtfn, &bnxt_re_aeq_handler);
1340 1341 1342 1343 1344
	if (rc) {
		pr_err("Failed to enable RCFW channel: %#x\n", rc);
		goto free_ring;
	}

1345 1346
	rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
				     rdev->is_virtfn);
1347 1348
	if (rc)
		goto disable_rcfw;
1349 1350
	if (!rdev->is_virtfn)
		bnxt_re_set_resource_limits(rdev);
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364

	rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
	if (rc) {
		pr_err("Failed to allocate QPLIB context: %#x\n", rc);
		goto disable_rcfw;
	}
	rc = bnxt_re_net_stats_ctx_alloc(rdev,
					 rdev->qplib_ctx.stats.dma_map,
					 &rdev->qplib_ctx.stats.fw_id);
	if (rc) {
		pr_err("Failed to allocate stats context: %#x\n", rc);
		goto free_ctx;
	}

1365 1366
	rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
				  rdev->is_virtfn);
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
	if (rc) {
		pr_err("Failed to initialize RCFW: %#x\n", rc);
		goto free_sctx;
	}
	set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);

	/* Resources based on the 'new' device caps */
	rc = bnxt_re_alloc_res(rdev);
	if (rc) {
		pr_err("Failed to allocate resources: %#x\n", rc);
		goto fail;
	}
1379
	set_bit(BNXT_RE_FLAG_RESOURCES_ALLOCATED, &rdev->flags);
1380 1381 1382 1383 1384 1385
	rc = bnxt_re_init_res(rdev);
	if (rc) {
		pr_err("Failed to initialize resources: %#x\n", rc);
		goto fail;
	}

1386 1387
	set_bit(BNXT_RE_FLAG_RESOURCES_INITIALIZED, &rdev->flags);

1388 1389 1390 1391
	if (!rdev->is_virtfn) {
		rc = bnxt_re_setup_qos(rdev);
		if (rc)
			pr_info("RoCE priority not yet configured\n");
1392

1393 1394 1395 1396
		INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
		set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
		schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
	}
1397

1398 1399 1400
	rtnl_unlock();
	locked = false;

1401 1402 1403 1404 1405 1406
	/* Register ib dev */
	rc = bnxt_re_register_ib(rdev);
	if (rc) {
		pr_err("Failed to register with IB: %#x\n", rc);
		goto fail;
	}
1407
	set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1408
	dev_info(rdev_to_dev(rdev), "Device registered successfully");
1409 1410
	ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
			 &rdev->active_width);
1411
	set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
1412 1413 1414 1415 1416
	bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
	bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);

	return 0;
free_sctx:
1417
	bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id);
1418 1419 1420 1421 1422
free_ctx:
	bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
disable_rcfw:
	bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
free_ring:
1423
	bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id);
1424 1425 1426
free_rcfw:
	bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
fail:
1427 1428 1429 1430 1431
	if (!locked)
		rtnl_lock();
	bnxt_re_ib_unreg(rdev);
	rtnl_unlock();

1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492
	return rc;
}

static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
{
	struct bnxt_en_dev *en_dev = rdev->en_dev;
	struct net_device *netdev = rdev->netdev;

	bnxt_re_dev_remove(rdev);

	if (netdev)
		bnxt_re_dev_unprobe(netdev, en_dev);
}

static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
{
	struct bnxt_en_dev *en_dev;
	int rc = 0;

	if (!is_bnxt_re_dev(netdev))
		return -ENODEV;

	en_dev = bnxt_re_dev_probe(netdev);
	if (IS_ERR(en_dev)) {
		if (en_dev != ERR_PTR(-ENODEV))
			pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
		rc = PTR_ERR(en_dev);
		goto exit;
	}
	*rdev = bnxt_re_dev_add(netdev, en_dev);
	if (!*rdev) {
		rc = -ENOMEM;
		bnxt_re_dev_unprobe(netdev, en_dev);
		goto exit;
	}
exit:
	return rc;
}

static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
{
	pci_dev_put(rdev->en_dev->pdev);
}

/* Handle all deferred netevents tasks */
static void bnxt_re_task(struct work_struct *work)
{
	struct bnxt_re_work *re_work;
	struct bnxt_re_dev *rdev;
	int rc = 0;

	re_work = container_of(work, struct bnxt_re_work, work);
	rdev = re_work->rdev;

	if (re_work->event != NETDEV_REGISTER &&
	    !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
		return;

	switch (re_work->event) {
	case NETDEV_REGISTER:
		rc = bnxt_re_ib_reg(rdev);
1493
		if (rc) {
1494 1495
			dev_err(rdev_to_dev(rdev),
				"Failed to register with IB: %#x", rc);
1496 1497
			bnxt_re_remove_one(rdev);
			bnxt_re_dev_unreg(rdev);
1498
			goto exit;
1499
		}
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513
		break;
	case NETDEV_UP:
		bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
				       IB_EVENT_PORT_ACTIVE);
		break;
	case NETDEV_DOWN:
		bnxt_re_dev_stop(rdev);
		break;
	case NETDEV_CHANGE:
		if (!netif_carrier_ok(rdev->netdev))
			bnxt_re_dev_stop(rdev);
		else if (netif_carrier_ok(rdev->netdev))
			bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
					       IB_EVENT_PORT_ACTIVE);
1514 1515
		ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
				 &rdev->active_width);
1516 1517 1518 1519
		break;
	default:
		break;
	}
1520
	smp_mb__before_atomic();
1521
	atomic_dec(&rdev->sched_count);
1522
exit:
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580
	kfree(re_work);
}

static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
{
	pci_dev_get(rdev->en_dev->pdev);
}

/*
 * "Notifier chain callback can be invoked for the same chain from
 * different CPUs at the same time".
 *
 * For cases when the netdev is already present, our call to the
 * register_netdevice_notifier() will actually get the rtnl_lock()
 * before sending NETDEV_REGISTER and (if up) NETDEV_UP
 * events.
 *
 * But for cases when the netdev is not already present, the notifier
 * chain is subjected to be invoked from different CPUs simultaneously.
 *
 * This is protected by the netdev_mutex.
 */
static int bnxt_re_netdev_event(struct notifier_block *notifier,
				unsigned long event, void *ptr)
{
	struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
	struct bnxt_re_work *re_work;
	struct bnxt_re_dev *rdev;
	int rc = 0;
	bool sch_work = false;

	real_dev = rdma_vlan_dev_real_dev(netdev);
	if (!real_dev)
		real_dev = netdev;

	rdev = bnxt_re_from_netdev(real_dev);
	if (!rdev && event != NETDEV_REGISTER)
		goto exit;
	if (real_dev != netdev)
		goto exit;

	switch (event) {
	case NETDEV_REGISTER:
		if (rdev)
			break;
		rc = bnxt_re_dev_reg(&rdev, real_dev);
		if (rc == -ENODEV)
			break;
		if (rc) {
			pr_err("Failed to register with the device %s: %#x\n",
			       real_dev->name, rc);
			break;
		}
		bnxt_re_init_one(rdev);
		sch_work = true;
		break;

	case NETDEV_UNREGISTER:
1581 1582 1583
		/* netdev notifier will call NETDEV_UNREGISTER again later since
		 * we are still holding the reference to the netdev
		 */
1584
		if (atomic_read(&rdev->sched_count) > 0)
1585
			goto exit;
1586
		bnxt_re_ib_unreg(rdev);
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
		bnxt_re_remove_one(rdev);
		bnxt_re_dev_unreg(rdev);
		break;

	default:
		sch_work = true;
		break;
	}
	if (sch_work) {
		/* Allocate for the deferred task */
		re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
		if (re_work) {
			re_work->rdev = rdev;
			re_work->event = event;
			re_work->vlan_dev = (real_dev == netdev ?
					     NULL : netdev);
			INIT_WORK(&re_work->work, bnxt_re_task);
1604
			atomic_inc(&rdev->sched_count);
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644
			queue_work(bnxt_re_wq, &re_work->work);
		}
	}

exit:
	return NOTIFY_DONE;
}

static struct notifier_block bnxt_re_netdev_notifier = {
	.notifier_call = bnxt_re_netdev_event
};

static int __init bnxt_re_mod_init(void)
{
	int rc = 0;

	pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);

	bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
	if (!bnxt_re_wq)
		return -ENOMEM;

	INIT_LIST_HEAD(&bnxt_re_dev_list);

	rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
	if (rc) {
		pr_err("%s: Cannot register to netdevice_notifier",
		       ROCE_DRV_MODULE_NAME);
		goto err_netdev;
	}
	return 0;

err_netdev:
	destroy_workqueue(bnxt_re_wq);

	return rc;
}

static void __exit bnxt_re_mod_exit(void)
{
1645
	struct bnxt_re_dev *rdev, *next;
1646 1647 1648 1649 1650 1651 1652
	LIST_HEAD(to_be_deleted);

	mutex_lock(&bnxt_re_dev_lock);
	/* Free all adapter allocated resources */
	if (!list_empty(&bnxt_re_dev_list))
		list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
	mutex_unlock(&bnxt_re_dev_lock);
1653 1654 1655 1656 1657
       /*
	* Cleanup the devices in reverse order so that the VF device
	* cleanup is done before PF cleanup
	*/
	list_for_each_entry_safe_reverse(rdev, next, &to_be_deleted, list) {
1658
		dev_info(rdev_to_dev(rdev), "Unregistering Device");
1659 1660 1661 1662 1663
		/*
		 * Flush out any scheduled tasks before destroying the
		 * resources
		 */
		flush_workqueue(bnxt_re_wq);
1664
		bnxt_re_dev_stop(rdev);
1665 1666 1667 1668
		/* Acquire the rtnl_lock as the L2 resources are freed here */
		rtnl_lock();
		bnxt_re_ib_unreg(rdev);
		rtnl_unlock();
1669 1670 1671
		bnxt_re_remove_one(rdev);
		bnxt_re_dev_unreg(rdev);
	}
1672 1673 1674 1675 1676 1677 1678
	unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
	if (bnxt_re_wq)
		destroy_workqueue(bnxt_re_wq);
}

module_init(bnxt_re_mod_init);
module_exit(bnxt_re_mod_exit);