/*
 * 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"
#include "hw_counters.h"

static char version[] =
                BNXT_RE_DESC " v" ROCE_DRV_MODULE_VERSION "\n";

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;
static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait);

/* 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;
}

/* 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)
{
        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);
}

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

        if (!rdev)
                return;

        bnxt_re_ib_unreg(rdev, false);
}

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);
        }
}

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

/* RoCE -> Net driver */

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

        if (!rdev)
                return -EINVAL;

        en_dev = rdev->en_dev;
        /* Acquire rtnl lock if it is not invokded from netdev event */
        if (lock_wait)
                rtnl_lock();

        rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
                                                    BNXT_ROCE_ULP);
        if (lock_wait)
                rtnl_unlock();
        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;

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

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

        if (!rdev)
                return -EINVAL;

        en_dev = rdev->en_dev;

        if (lock_wait)
                rtnl_lock();

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

        if (lock_wait)
                rtnl_unlock();
        return rc;
}

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

        if (!rdev)
                return -EINVAL;

        en_dev = rdev->en_dev;

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

        rtnl_lock();
        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:
        rtnl_unlock();
        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;
}

static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id,
                                 bool lock_wait)
{
        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;
        bool do_unlock = false;
        int rc = -EINVAL;

        if (!en_dev)
                return rc;

        memset(&fw_msg, 0, sizeof(fw_msg));
        if (lock_wait) {
                rtnl_lock();
                do_unlock = true;
        }

        bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
        req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
        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);
        if (do_unlock)
                rtnl_unlock();
        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));
        rtnl_lock();
        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);
        req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
        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);

        rtnl_unlock();
        return rc;
}

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

        if (!en_dev)
                return rc;

        memset(&fw_msg, 0, sizeof(fw_msg));
        if (lock_wait) {
                rtnl_lock();
                do_unlock = true;
        }

        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);

        if (do_unlock)
                rtnl_unlock();
        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));
        rtnl_lock();

        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);
        req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
        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);

        rtnl_unlock();
        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)) {
                dev_info(&pdev->dev,
                        "%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;
}

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

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->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
        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;
        ibdev->dev.parent = &rdev->en_dev->pdev->dev;
        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 */

        /* Kernel verbs */
        ibdev->query_device             = bnxt_re_query_device;
        ibdev->modify_device            = bnxt_re_modify_device;

        ibdev->query_port               = bnxt_re_query_port;
        ibdev->get_port_immutable       = bnxt_re_get_port_immutable;
        ibdev->get_dev_fw_str           = bnxt_re_query_fw_str;
        ibdev->query_pkey               = bnxt_re_query_pkey;
        ibdev->query_gid                = bnxt_re_query_gid;
        ibdev->get_netdev               = bnxt_re_get_netdev;
        ibdev->add_gid                  = bnxt_re_add_gid;
        ibdev->del_gid                  = bnxt_re_del_gid;
        ibdev->get_link_layer           = bnxt_re_get_link_layer;

        ibdev->alloc_pd                 = bnxt_re_alloc_pd;
        ibdev->dealloc_pd               = bnxt_re_dealloc_pd;

        ibdev->create_ah                = bnxt_re_create_ah;
        ibdev->modify_ah                = bnxt_re_modify_ah;
        ibdev->query_ah                 = bnxt_re_query_ah;
        ibdev->destroy_ah               = bnxt_re_destroy_ah;

        ibdev->create_srq               = bnxt_re_create_srq;
        ibdev->modify_srq               = bnxt_re_modify_srq;
        ibdev->query_srq                = bnxt_re_query_srq;
        ibdev->destroy_srq              = bnxt_re_destroy_srq;
        ibdev->post_srq_recv            = bnxt_re_post_srq_recv;

        ibdev->create_qp                = bnxt_re_create_qp;
        ibdev->modify_qp                = bnxt_re_modify_qp;
        ibdev->query_qp                 = bnxt_re_query_qp;
        ibdev->destroy_qp               = bnxt_re_destroy_qp;

        ibdev->post_send                = bnxt_re_post_send;
        ibdev->post_recv                = bnxt_re_post_recv;

        ibdev->create_cq                = bnxt_re_create_cq;
        ibdev->destroy_cq               = bnxt_re_destroy_cq;
        ibdev->poll_cq                  = bnxt_re_poll_cq;
        ibdev->req_notify_cq            = bnxt_re_req_notify_cq;

        ibdev->get_dma_mr               = bnxt_re_get_dma_mr;
        ibdev->dereg_mr                 = bnxt_re_dereg_mr;
        ibdev->alloc_mr                 = bnxt_re_alloc_mr;
        ibdev->map_mr_sg                = bnxt_re_map_mr_sg;

        ibdev->reg_user_mr              = bnxt_re_reg_user_mr;
        ibdev->alloc_ucontext           = bnxt_re_alloc_ucontext;
        ibdev->dealloc_ucontext         = bnxt_re_dealloc_ucontext;
        ibdev->mmap                     = bnxt_re_mmap;
        ibdev->get_hw_stats             = bnxt_re_ib_get_hw_stats;
        ibdev->alloc_hw_stats           = bnxt_re_ib_alloc_hw_stats;

        return ib_register_device(ibdev, NULL);
}

static ssize_t show_rev(struct device *device, struct device_attribute *attr,
                        char *buf)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);

        return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
}

static ssize_t show_hca(struct device *device, struct device_attribute *attr,
                        char *buf)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);

        return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
}

static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);

static struct device_attribute *bnxt_re_attributes[] = {
        &dev_attr_hw_rev,
        &dev_attr_hca_type
};

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 */
        rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
        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;
}


static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
                                             *unaffi_async)
{
        switch (unaffi_async->event) {
        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;
}


static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
                                         struct bnxt_re_qp *qp)
{
        struct ib_event event;
        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);
        }

        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;
}

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)
{
        int i;

        if (rdev->nq[0].hwq.max_elements) {
                for (i = 1; i < rdev->num_msix; i++)
                        bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
        }

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

static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
{
        int rc = 0, i;

        bnxt_qplib_init_res(&rdev->qplib_res);

        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,
                                          &bnxt_re_cqn_handler,
                                          &bnxt_re_srqn_handler);

                if (rc) {
                        dev_err(rdev_to_dev(rdev),
                                "Failed to enable NQ with rc = 0x%x", rc);
                        goto fail;
                }
        }
        return 0;
fail:
        return rc;
}

static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev, bool lock_wait)
{
        int i;

        for (i = 0; i < rdev->num_msix - 1; i++) {
                bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, lock_wait);
                bnxt_qplib_free_nq(&rdev->nq[i]);
        }
}

static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
{
        bnxt_re_free_nq_res(rdev, lock_wait);

        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)
{
        int rc = 0, i;

        /* Configure and allocate resources for qplib */
        rdev->qplib_res.rcfw = &rdev->rcfw;
        rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
                                     rdev->is_virtfn);
        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)
                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);
                        goto dealloc_dpi;
                }
                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);
                        goto free_nq;
                }
        }
        return 0;
free_nq:
        for (i = 0; i < rdev->num_msix - 1; i++)
                bnxt_qplib_free_nq(&rdev->nq[i]);
dealloc_dpi:
        bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
                               &rdev->qplib_res.dpi_tbl,
                               &rdev->dpi_privileged);
dealloc_res:
        bnxt_qplib_free_res(&rdev->qplib_res);

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;
        if (qp)
                ib_event.element.qp = qp;
        else
                ib_event.element.port_num = port_num;
        ib_event.event = event;
        ib_dispatch_event(&ib_event);
}

#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);
}

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;
}

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 */
        prio_map = bnxt_re_get_priority_mask(rdev);

        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;
        }

        /* 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);
        }

        return 0;
}

static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
{
        int i, rc;

        if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
                for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
                        device_remove_file(&rdev->ibdev.dev,
                                           bnxt_re_attributes[i]);
                /* Cleanup ib dev */
                bnxt_re_unregister_ib(rdev);
        }
        if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
                cancel_delayed_work(&rdev->worker);

        bnxt_re_cleanup_res(rdev);
        bnxt_re_free_res(rdev, lock_wait);

        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);
                bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
                                           lock_wait);
                bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
                bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
                bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
                bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
        }
        if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
                rc = bnxt_re_free_msix(rdev, lock_wait);
                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)) {
                rc = bnxt_re_unregister_netdev(rdev, lock_wait);
                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)
{
        int i, j, rc;

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

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

        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);

        /* Establish RCFW Communication Channel to initialize the context
         * memory for the function and all child VFs
         */
        rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
                                           BNXT_RE_MAX_QPC_COUNT);
        if (rc) {
                pr_err("Failed to allocate RCFW Channel: %#x\n", rc);
                goto fail;
        }
        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,
                                 rdev->is_virtfn, &bnxt_re_aeq_handler);
        if (rc) {
                pr_err("Failed to enable RCFW channel: %#x\n", rc);
                goto free_ring;
        }

        rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr,
                                     rdev->is_virtfn);
        if (rc)
                goto disable_rcfw;
        if (!rdev->is_virtfn)
                bnxt_re_set_resource_limits(rdev);

        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;
        }

        rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx,
                                  rdev->is_virtfn);
        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;
        }
        rc = bnxt_re_init_res(rdev);
        if (rc) {
                pr_err("Failed to initialize resources: %#x\n", rc);
                goto fail;
        }

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

                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));
        }

        /* Register ib dev */
        rc = bnxt_re_register_ib(rdev);
        if (rc) {
                pr_err("Failed to register with IB: %#x\n", rc);
                goto fail;
        }
        dev_info(rdev_to_dev(rdev), "Device registered successfully");
        for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
                rc = device_create_file(&rdev->ibdev.dev,
                                        bnxt_re_attributes[i]);
                if (rc) {
                        dev_err(rdev_to_dev(rdev),
                                "Failed to create IB sysfs: %#x", rc);
                        /* Must clean up all created device files */
                        for (j = 0; j < i; j++)
                                device_remove_file(&rdev->ibdev.dev,
                                                   bnxt_re_attributes[j]);
                        bnxt_re_unregister_ib(rdev);
                        goto fail;
                }
        }
        set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
        ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
                         &rdev->active_width);
        set_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags);
        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:
        bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
free_ctx:
        bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
disable_rcfw:
        bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
free_ring:
        bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
free_rcfw:
        bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
fail:
        bnxt_re_ib_unreg(rdev, true);
        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);
                if (rc) {
                        dev_err(rdev_to_dev(rdev),
                                "Failed to register with IB: %#x", rc);
                        bnxt_re_remove_one(rdev);
                        bnxt_re_dev_unreg(rdev);
                }
                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);
                ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
                                 &rdev->active_width);
                break;
        default:
                break;
        }
        smp_mb__before_atomic();
        atomic_dec(&rdev->sched_count);
        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:
                /* netdev notifier will call NETDEV_UNREGISTER again later since
                 * we are still holding the reference to the netdev
                 */
                if (atomic_read(&rdev->sched_count) > 0)
                        goto exit;
                bnxt_re_ib_unreg(rdev, false);
                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);
                        atomic_inc(&rdev->sched_count);
                        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_rh(&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)
{
        struct bnxt_re_dev *rdev, *next;
        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);

       /*
        * 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) {
                dev_info(rdev_to_dev(rdev), "Unregistering Device");
                /*
                 * Flush out any scheduled tasks before destroying the
                 * resources
                 */
                flush_workqueue(bnxt_re_wq);
                bnxt_re_dev_stop(rdev);
                bnxt_re_ib_unreg(rdev, true);
                bnxt_re_remove_one(rdev);
                bnxt_re_dev_unreg(rdev);
        }
        unregister_netdevice_notifier_rh(&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);