diff options
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/main.c')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/main.c | 1315 |
1 files changed, 1315 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c new file mode 100644 index 000000000000..5d355401179b --- /dev/null +++ b/drivers/infiniband/hw/bnxt_re/main.c @@ -0,0 +1,1315 @@ +/* + * 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" +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"); +MODULE_VERSION(ROCE_DRV_MODULE_VERSION); + +/* 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; + +/* 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) +{ +} + +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 +}; + +/* 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_MIN_MSIX, num_msix_got; + struct bnxt_en_dev *en_dev; + + if (!rdev) + return -EINVAL; + + en_dev = rdev->en_dev; + + 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); + 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_dbg(&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->modify_port = bnxt_re_modify_port; + ibdev->get_port_immutable = bnxt_re_get_port_immutable; + 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_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->alloc_fmr = bnxt_re_alloc_fmr; + ibdev->map_phys_fmr = bnxt_re_map_phys_fmr; + ibdev->unmap_fmr = bnxt_re_unmap_fmr; + ibdev->dealloc_fmr = bnxt_re_dealloc_fmr; + + 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; + + 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_fw_ver(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->dev_attr.fw_ver); +} + +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(fw_rev, 0444, show_fw_ver, NULL); +static DEVICE_ATTR(hca_type, 0444, show_hca, NULL); + +static struct device_attribute *bnxt_re_attributes[] = { + &dev_attr_hw_rev, + &dev_attr_fw_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(); + flush_workqueue(bnxt_re_wq); + + 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_aeq_handler(struct bnxt_qplib_rcfw *rcfw, + struct creq_func_event *aeqe) +{ + switch (aeqe->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_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) +{ + if (rdev->nq.hwq.max_elements) + bnxt_qplib_disable_nq(&rdev->nq); + + 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; + + bnxt_qplib_init_res(&rdev->qplib_res); + + if (rdev->msix_entries[BNXT_RE_NQ_IDX].vector <= 0) + return -EINVAL; + + rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq, + rdev->msix_entries[BNXT_RE_NQ_IDX].vector, + rdev->msix_entries[BNXT_RE_NQ_IDX].db_offset, + &bnxt_re_cqn_handler, + NULL); + + if (rc) + dev_err(rdev_to_dev(rdev), "Failed to enable NQ: %#x", rc); + + return rc; +} + +static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait) +{ + if (rdev->nq.hwq.max_elements) { + bnxt_re_net_ring_free(rdev, rdev->nq.ring_id, lock_wait); + bnxt_qplib_free_nq(&rdev->nq); + } + 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; + + /* Configure and allocate resources for qplib */ + rdev->qplib_res.rcfw = &rdev->rcfw; + rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr); + 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 fail; + + rdev->nq.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); + if (rc) { + dev_err(rdev_to_dev(rdev), + "Failed to allocate NQ memory: %#x", rc); + goto fail; + } + rc = bnxt_re_net_ring_alloc + (rdev, rdev->nq.hwq.pbl[PBL_LVL_0].pg_map_arr, + rdev->nq.hwq.pbl[rdev->nq.hwq.level].pg_count, + HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_NQE_MAX_CNT - 1, + rdev->msix_entries[BNXT_RE_NQ_IDX].ring_idx, + &rdev->nq.ring_id); + if (rc) { + dev_err(rdev_to_dev(rdev), + "Failed to allocate NQ ring: %#x", rc); + goto free_nq; + } + return 0; +free_nq: + bnxt_qplib_free_nq(&rdev->nq); +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 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; + + if (!prio_map) + prio_map = -EFAULT; + 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 */ + rc = bnxt_re_get_priority_mask(rdev); + if (rc < 0) + return rc; + prio_map = (u8)rc; + + 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; + } + + 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); + } +} + +static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev) +{ + u32 i; + + rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT; + rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT; + rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT; + rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT; + for (i = 0; i < MAX_TQM_ALLOC_REQ; i++) + rdev->qplib_ctx.tqm_count[i] = + rdev->dev_attr.tqm_alloc_reqs[i]; +} + +/* 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); + + 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); + if (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, + 0, &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); + if (rc) + goto disable_rcfw; + 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, 0); + 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; + } + + 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); + 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); + 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); + break; + default: + break; + } + 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: + 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); + 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) +{ + 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); |