| // SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause |
| |
| /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */ |
| /* Copyright (c) 2008-2019, IBM Corporation */ |
| |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <net/net_namespace.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/if_arp.h> |
| #include <linux/list.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| |
| #include <rdma/ib_verbs.h> |
| #include <rdma/ib_user_verbs.h> |
| #include <rdma/rdma_netlink.h> |
| #include <linux/kthread.h> |
| |
| #include "siw.h" |
| #include "siw_verbs.h" |
| |
| MODULE_AUTHOR("Bernard Metzler"); |
| MODULE_DESCRIPTION("Software iWARP Driver"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| /* transmit from user buffer, if possible */ |
| const bool zcopy_tx = true; |
| |
| /* Restrict usage of GSO, if hardware peer iwarp is unable to process |
| * large packets. try_gso = true lets siw try to use local GSO, |
| * if peer agrees. Not using GSO severly limits siw maximum tx bandwidth. |
| */ |
| const bool try_gso; |
| |
| /* Attach siw also with loopback devices */ |
| const bool loopback_enabled = true; |
| |
| /* We try to negotiate CRC on, if true */ |
| const bool mpa_crc_required; |
| |
| /* MPA CRC on/off enforced */ |
| const bool mpa_crc_strict; |
| |
| /* Control TCP_NODELAY socket option */ |
| const bool siw_tcp_nagle; |
| |
| /* Select MPA version to be used during connection setup */ |
| u_char mpa_version = MPA_REVISION_2; |
| |
| /* Selects MPA P2P mode (additional handshake during connection |
| * setup, if true. |
| */ |
| const bool peer_to_peer; |
| |
| struct task_struct *siw_tx_thread[NR_CPUS]; |
| struct crypto_shash *siw_crypto_shash; |
| |
| static int siw_device_register(struct siw_device *sdev, const char *name) |
| { |
| struct ib_device *base_dev = &sdev->base_dev; |
| static int dev_id = 1; |
| int rv; |
| |
| rv = ib_register_device(base_dev, name); |
| if (rv) { |
| pr_warn("siw: device registration error %d\n", rv); |
| return rv; |
| } |
| sdev->vendor_part_id = dev_id++; |
| |
| siw_dbg(base_dev, "HWaddr=%pM\n", sdev->netdev->dev_addr); |
| |
| return 0; |
| } |
| |
| static void siw_device_cleanup(struct ib_device *base_dev) |
| { |
| struct siw_device *sdev = to_siw_dev(base_dev); |
| |
| xa_destroy(&sdev->qp_xa); |
| xa_destroy(&sdev->mem_xa); |
| } |
| |
| static int siw_create_tx_threads(void) |
| { |
| int cpu, assigned = 0; |
| |
| for_each_online_cpu(cpu) { |
| /* Skip HT cores */ |
| if (cpu % cpumask_weight(topology_sibling_cpumask(cpu))) |
| continue; |
| |
| siw_tx_thread[cpu] = |
| kthread_create(siw_run_sq, (unsigned long *)(long)cpu, |
| "siw_tx/%d", cpu); |
| if (IS_ERR(siw_tx_thread[cpu])) { |
| siw_tx_thread[cpu] = NULL; |
| continue; |
| } |
| kthread_bind(siw_tx_thread[cpu], cpu); |
| |
| wake_up_process(siw_tx_thread[cpu]); |
| assigned++; |
| } |
| return assigned; |
| } |
| |
| static int siw_dev_qualified(struct net_device *netdev) |
| { |
| /* |
| * Additional hardware support can be added here |
| * (e.g. ARPHRD_FDDI, ARPHRD_ATM, ...) - see |
| * <linux/if_arp.h> for type identifiers. |
| */ |
| if (netdev->type == ARPHRD_ETHER || netdev->type == ARPHRD_IEEE802 || |
| (netdev->type == ARPHRD_LOOPBACK && loopback_enabled)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static DEFINE_PER_CPU(atomic_t, siw_use_cnt); |
| |
| static struct { |
| struct cpumask **tx_valid_cpus; |
| int num_nodes; |
| } siw_cpu_info; |
| |
| static int siw_init_cpulist(void) |
| { |
| int i, num_nodes = num_possible_nodes(); |
| |
| memset(siw_tx_thread, 0, sizeof(siw_tx_thread)); |
| |
| siw_cpu_info.num_nodes = num_nodes; |
| |
| siw_cpu_info.tx_valid_cpus = |
| kcalloc(num_nodes, sizeof(struct cpumask *), GFP_KERNEL); |
| if (!siw_cpu_info.tx_valid_cpus) { |
| siw_cpu_info.num_nodes = 0; |
| return -ENOMEM; |
| } |
| for (i = 0; i < siw_cpu_info.num_nodes; i++) { |
| siw_cpu_info.tx_valid_cpus[i] = |
| kzalloc(sizeof(struct cpumask), GFP_KERNEL); |
| if (!siw_cpu_info.tx_valid_cpus[i]) |
| goto out_err; |
| |
| cpumask_clear(siw_cpu_info.tx_valid_cpus[i]); |
| } |
| for_each_possible_cpu(i) |
| cpumask_set_cpu(i, siw_cpu_info.tx_valid_cpus[cpu_to_node(i)]); |
| |
| return 0; |
| |
| out_err: |
| siw_cpu_info.num_nodes = 0; |
| while (--i >= 0) |
| kfree(siw_cpu_info.tx_valid_cpus[i]); |
| kfree(siw_cpu_info.tx_valid_cpus); |
| siw_cpu_info.tx_valid_cpus = NULL; |
| |
| return -ENOMEM; |
| } |
| |
| static void siw_destroy_cpulist(void) |
| { |
| int i = 0; |
| |
| while (i < siw_cpu_info.num_nodes) |
| kfree(siw_cpu_info.tx_valid_cpus[i++]); |
| |
| kfree(siw_cpu_info.tx_valid_cpus); |
| } |
| |
| /* |
| * Choose CPU with least number of active QP's from NUMA node of |
| * TX interface. |
| */ |
| int siw_get_tx_cpu(struct siw_device *sdev) |
| { |
| const struct cpumask *tx_cpumask; |
| int i, num_cpus, cpu, min_use, node = sdev->numa_node, tx_cpu = -1; |
| |
| if (node < 0) |
| tx_cpumask = cpu_online_mask; |
| else |
| tx_cpumask = siw_cpu_info.tx_valid_cpus[node]; |
| |
| num_cpus = cpumask_weight(tx_cpumask); |
| if (!num_cpus) { |
| /* no CPU on this NUMA node */ |
| tx_cpumask = cpu_online_mask; |
| num_cpus = cpumask_weight(tx_cpumask); |
| } |
| if (!num_cpus) |
| goto out; |
| |
| cpu = cpumask_first(tx_cpumask); |
| |
| for (i = 0, min_use = SIW_MAX_QP; i < num_cpus; |
| i++, cpu = cpumask_next(cpu, tx_cpumask)) { |
| int usage; |
| |
| /* Skip any cores which have no TX thread */ |
| if (!siw_tx_thread[cpu]) |
| continue; |
| |
| usage = atomic_read(&per_cpu(siw_use_cnt, cpu)); |
| if (usage <= min_use) { |
| tx_cpu = cpu; |
| min_use = usage; |
| } |
| } |
| siw_dbg(&sdev->base_dev, |
| "tx cpu %d, node %d, %d qp's\n", tx_cpu, node, min_use); |
| |
| out: |
| if (tx_cpu >= 0) |
| atomic_inc(&per_cpu(siw_use_cnt, tx_cpu)); |
| else |
| pr_warn("siw: no tx cpu found\n"); |
| |
| return tx_cpu; |
| } |
| |
| void siw_put_tx_cpu(int cpu) |
| { |
| atomic_dec(&per_cpu(siw_use_cnt, cpu)); |
| } |
| |
| static struct ib_qp *siw_get_base_qp(struct ib_device *base_dev, int id) |
| { |
| struct siw_qp *qp = siw_qp_id2obj(to_siw_dev(base_dev), id); |
| |
| if (qp) { |
| /* |
| * siw_qp_id2obj() increments object reference count |
| */ |
| siw_qp_put(qp); |
| return qp->ib_qp; |
| } |
| return NULL; |
| } |
| |
| static void siw_verbs_sq_flush(struct ib_qp *base_qp) |
| { |
| struct siw_qp *qp = to_siw_qp(base_qp); |
| |
| down_write(&qp->state_lock); |
| siw_sq_flush(qp); |
| up_write(&qp->state_lock); |
| } |
| |
| static void siw_verbs_rq_flush(struct ib_qp *base_qp) |
| { |
| struct siw_qp *qp = to_siw_qp(base_qp); |
| |
| down_write(&qp->state_lock); |
| siw_rq_flush(qp); |
| up_write(&qp->state_lock); |
| } |
| |
| static const struct ib_device_ops siw_device_ops = { |
| .owner = THIS_MODULE, |
| .uverbs_abi_ver = SIW_ABI_VERSION, |
| .driver_id = RDMA_DRIVER_SIW, |
| |
| .alloc_mr = siw_alloc_mr, |
| .alloc_pd = siw_alloc_pd, |
| .alloc_ucontext = siw_alloc_ucontext, |
| .create_cq = siw_create_cq, |
| .create_qp = siw_create_qp, |
| .create_srq = siw_create_srq, |
| .dealloc_driver = siw_device_cleanup, |
| .dealloc_pd = siw_dealloc_pd, |
| .dealloc_ucontext = siw_dealloc_ucontext, |
| .dereg_mr = siw_dereg_mr, |
| .destroy_cq = siw_destroy_cq, |
| .destroy_qp = siw_destroy_qp, |
| .destroy_srq = siw_destroy_srq, |
| .drain_rq = siw_verbs_rq_flush, |
| .drain_sq = siw_verbs_sq_flush, |
| .get_dma_mr = siw_get_dma_mr, |
| .get_port_immutable = siw_get_port_immutable, |
| .iw_accept = siw_accept, |
| .iw_add_ref = siw_qp_get_ref, |
| .iw_connect = siw_connect, |
| .iw_create_listen = siw_create_listen, |
| .iw_destroy_listen = siw_destroy_listen, |
| .iw_get_qp = siw_get_base_qp, |
| .iw_reject = siw_reject, |
| .iw_rem_ref = siw_qp_put_ref, |
| .map_mr_sg = siw_map_mr_sg, |
| .mmap = siw_mmap, |
| .modify_qp = siw_verbs_modify_qp, |
| .modify_srq = siw_modify_srq, |
| .poll_cq = siw_poll_cq, |
| .post_recv = siw_post_receive, |
| .post_send = siw_post_send, |
| .post_srq_recv = siw_post_srq_recv, |
| .query_device = siw_query_device, |
| .query_gid = siw_query_gid, |
| .query_pkey = siw_query_pkey, |
| .query_port = siw_query_port, |
| .query_qp = siw_query_qp, |
| .query_srq = siw_query_srq, |
| .req_notify_cq = siw_req_notify_cq, |
| .reg_user_mr = siw_reg_user_mr, |
| |
| INIT_RDMA_OBJ_SIZE(ib_cq, siw_cq, base_cq), |
| INIT_RDMA_OBJ_SIZE(ib_pd, siw_pd, base_pd), |
| INIT_RDMA_OBJ_SIZE(ib_srq, siw_srq, base_srq), |
| INIT_RDMA_OBJ_SIZE(ib_ucontext, siw_ucontext, base_ucontext), |
| }; |
| |
| static struct siw_device *siw_device_create(struct net_device *netdev) |
| { |
| struct siw_device *sdev = NULL; |
| struct ib_device *base_dev; |
| struct device *parent = netdev->dev.parent; |
| int rv; |
| |
| if (!parent) { |
| /* |
| * The loopback device has no parent device, |
| * so it appears as a top-level device. To support |
| * loopback device connectivity, take this device |
| * as the parent device. Skip all other devices |
| * w/o parent device. |
| */ |
| if (netdev->type != ARPHRD_LOOPBACK) { |
| pr_warn("siw: device %s error: no parent device\n", |
| netdev->name); |
| return NULL; |
| } |
| parent = &netdev->dev; |
| } |
| sdev = ib_alloc_device(siw_device, base_dev); |
| if (!sdev) |
| return NULL; |
| |
| base_dev = &sdev->base_dev; |
| |
| sdev->netdev = netdev; |
| |
| if (netdev->type != ARPHRD_LOOPBACK) { |
| memcpy(&base_dev->node_guid, netdev->dev_addr, 6); |
| } else { |
| /* |
| * The loopback device does not have a HW address, |
| * but connection mangagement lib expects gid != 0 |
| */ |
| size_t gidlen = min_t(size_t, strlen(base_dev->name), 6); |
| |
| memcpy(&base_dev->node_guid, base_dev->name, gidlen); |
| } |
| base_dev->uverbs_cmd_mask = |
| (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | |
| (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | |
| (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | |
| (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_DEREG_MR) | |
| (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | |
| (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | |
| (1ull << IB_USER_VERBS_CMD_POLL_CQ) | |
| (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | |
| (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | |
| (1ull << IB_USER_VERBS_CMD_CREATE_QP) | |
| (1ull << IB_USER_VERBS_CMD_QUERY_QP) | |
| (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | |
| (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | |
| (1ull << IB_USER_VERBS_CMD_POST_SEND) | |
| (1ull << IB_USER_VERBS_CMD_POST_RECV) | |
| (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | |
| (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV) | |
| (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | |
| (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | |
| (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ); |
| |
| base_dev->node_type = RDMA_NODE_RNIC; |
| memcpy(base_dev->node_desc, SIW_NODE_DESC_COMMON, |
| sizeof(SIW_NODE_DESC_COMMON)); |
| |
| /* |
| * Current model (one-to-one device association): |
| * One Softiwarp device per net_device or, equivalently, |
| * per physical port. |
| */ |
| base_dev->phys_port_cnt = 1; |
| base_dev->dev.parent = parent; |
| base_dev->dev.dma_ops = &dma_virt_ops; |
| base_dev->num_comp_vectors = num_possible_cpus(); |
| |
| ib_set_device_ops(base_dev, &siw_device_ops); |
| rv = ib_device_set_netdev(base_dev, netdev, 1); |
| if (rv) |
| goto error; |
| |
| memcpy(base_dev->iw_ifname, netdev->name, |
| sizeof(base_dev->iw_ifname)); |
| |
| /* Disable TCP port mapping */ |
| base_dev->iw_driver_flags = IW_F_NO_PORT_MAP, |
| |
| sdev->attrs.max_qp = SIW_MAX_QP; |
| sdev->attrs.max_qp_wr = SIW_MAX_QP_WR; |
| sdev->attrs.max_ord = SIW_MAX_ORD_QP; |
| sdev->attrs.max_ird = SIW_MAX_IRD_QP; |
| sdev->attrs.max_sge = SIW_MAX_SGE; |
| sdev->attrs.max_sge_rd = SIW_MAX_SGE_RD; |
| sdev->attrs.max_cq = SIW_MAX_CQ; |
| sdev->attrs.max_cqe = SIW_MAX_CQE; |
| sdev->attrs.max_mr = SIW_MAX_MR; |
| sdev->attrs.max_pd = SIW_MAX_PD; |
| sdev->attrs.max_mw = SIW_MAX_MW; |
| sdev->attrs.max_fmr = SIW_MAX_FMR; |
| sdev->attrs.max_srq = SIW_MAX_SRQ; |
| sdev->attrs.max_srq_wr = SIW_MAX_SRQ_WR; |
| sdev->attrs.max_srq_sge = SIW_MAX_SGE; |
| |
| xa_init_flags(&sdev->qp_xa, XA_FLAGS_ALLOC1); |
| xa_init_flags(&sdev->mem_xa, XA_FLAGS_ALLOC1); |
| |
| INIT_LIST_HEAD(&sdev->cep_list); |
| INIT_LIST_HEAD(&sdev->qp_list); |
| |
| atomic_set(&sdev->num_ctx, 0); |
| atomic_set(&sdev->num_srq, 0); |
| atomic_set(&sdev->num_qp, 0); |
| atomic_set(&sdev->num_cq, 0); |
| atomic_set(&sdev->num_mr, 0); |
| atomic_set(&sdev->num_pd, 0); |
| |
| sdev->numa_node = dev_to_node(parent); |
| spin_lock_init(&sdev->lock); |
| |
| return sdev; |
| error: |
| ib_dealloc_device(base_dev); |
| |
| return NULL; |
| } |
| |
| /* |
| * Network link becomes unavailable. Mark all |
| * affected QP's accordingly. |
| */ |
| static void siw_netdev_down(struct work_struct *work) |
| { |
| struct siw_device *sdev = |
| container_of(work, struct siw_device, netdev_down); |
| |
| struct siw_qp_attrs qp_attrs; |
| struct list_head *pos, *tmp; |
| |
| memset(&qp_attrs, 0, sizeof(qp_attrs)); |
| qp_attrs.state = SIW_QP_STATE_ERROR; |
| |
| list_for_each_safe(pos, tmp, &sdev->qp_list) { |
| struct siw_qp *qp = list_entry(pos, struct siw_qp, devq); |
| |
| down_write(&qp->state_lock); |
| WARN_ON(siw_qp_modify(qp, &qp_attrs, SIW_QP_ATTR_STATE)); |
| up_write(&qp->state_lock); |
| } |
| ib_device_put(&sdev->base_dev); |
| } |
| |
| static void siw_device_goes_down(struct siw_device *sdev) |
| { |
| if (ib_device_try_get(&sdev->base_dev)) { |
| INIT_WORK(&sdev->netdev_down, siw_netdev_down); |
| schedule_work(&sdev->netdev_down); |
| } |
| } |
| |
| static int siw_netdev_event(struct notifier_block *nb, unsigned long event, |
| void *arg) |
| { |
| struct net_device *netdev = netdev_notifier_info_to_dev(arg); |
| struct ib_device *base_dev; |
| struct siw_device *sdev; |
| |
| dev_dbg(&netdev->dev, "siw: event %lu\n", event); |
| |
| if (dev_net(netdev) != &init_net) |
| return NOTIFY_OK; |
| |
| base_dev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_SIW); |
| if (!base_dev) |
| return NOTIFY_OK; |
| |
| sdev = to_siw_dev(base_dev); |
| |
| switch (event) { |
| case NETDEV_UP: |
| sdev->state = IB_PORT_ACTIVE; |
| siw_port_event(sdev, 1, IB_EVENT_PORT_ACTIVE); |
| break; |
| |
| case NETDEV_GOING_DOWN: |
| siw_device_goes_down(sdev); |
| break; |
| |
| case NETDEV_DOWN: |
| sdev->state = IB_PORT_DOWN; |
| siw_port_event(sdev, 1, IB_EVENT_PORT_ERR); |
| break; |
| |
| case NETDEV_REGISTER: |
| /* |
| * Device registration now handled only by |
| * rdma netlink commands. So it shall be impossible |
| * to end up here with a valid siw device. |
| */ |
| siw_dbg(base_dev, "unexpected NETDEV_REGISTER event\n"); |
| break; |
| |
| case NETDEV_UNREGISTER: |
| ib_unregister_device_queued(&sdev->base_dev); |
| break; |
| |
| case NETDEV_CHANGEADDR: |
| siw_port_event(sdev, 1, IB_EVENT_LID_CHANGE); |
| break; |
| /* |
| * Todo: Below netdev events are currently not handled. |
| */ |
| case NETDEV_CHANGEMTU: |
| case NETDEV_CHANGE: |
| break; |
| |
| default: |
| break; |
| } |
| ib_device_put(&sdev->base_dev); |
| |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block siw_netdev_nb = { |
| .notifier_call = siw_netdev_event, |
| }; |
| |
| static int siw_newlink(const char *basedev_name, struct net_device *netdev) |
| { |
| struct ib_device *base_dev; |
| struct siw_device *sdev = NULL; |
| int rv = -ENOMEM; |
| |
| if (!siw_dev_qualified(netdev)) |
| return -EINVAL; |
| |
| base_dev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_SIW); |
| if (base_dev) { |
| ib_device_put(base_dev); |
| return -EEXIST; |
| } |
| sdev = siw_device_create(netdev); |
| if (sdev) { |
| dev_dbg(&netdev->dev, "siw: new device\n"); |
| |
| if (netif_running(netdev) && netif_carrier_ok(netdev)) |
| sdev->state = IB_PORT_ACTIVE; |
| else |
| sdev->state = IB_PORT_DOWN; |
| |
| rv = siw_device_register(sdev, basedev_name); |
| if (rv) |
| ib_dealloc_device(&sdev->base_dev); |
| } |
| return rv; |
| } |
| |
| static struct rdma_link_ops siw_link_ops = { |
| .type = "siw", |
| .newlink = siw_newlink, |
| }; |
| |
| /* |
| * siw_init_module - Initialize Softiwarp module and register with netdev |
| * subsystem. |
| */ |
| static __init int siw_init_module(void) |
| { |
| int rv; |
| int nr_cpu; |
| |
| if (SENDPAGE_THRESH < SIW_MAX_INLINE) { |
| pr_info("siw: sendpage threshold too small: %u\n", |
| (int)SENDPAGE_THRESH); |
| rv = -EINVAL; |
| goto out_error; |
| } |
| rv = siw_init_cpulist(); |
| if (rv) |
| goto out_error; |
| |
| rv = siw_cm_init(); |
| if (rv) |
| goto out_error; |
| |
| if (!siw_create_tx_threads()) { |
| pr_info("siw: Could not start any TX thread\n"); |
| rv = -ENOMEM; |
| goto out_error; |
| } |
| /* |
| * Locate CRC32 algorithm. If unsuccessful, fail |
| * loading siw only, if CRC is required. |
| */ |
| siw_crypto_shash = crypto_alloc_shash("crc32c", 0, 0); |
| if (IS_ERR(siw_crypto_shash)) { |
| pr_info("siw: Loading CRC32c failed: %ld\n", |
| PTR_ERR(siw_crypto_shash)); |
| siw_crypto_shash = NULL; |
| if (mpa_crc_required) { |
| rv = -EOPNOTSUPP; |
| goto out_error; |
| } |
| } |
| rv = register_netdevice_notifier(&siw_netdev_nb); |
| if (rv) |
| goto out_error; |
| |
| rdma_link_register(&siw_link_ops); |
| |
| pr_info("SoftiWARP attached\n"); |
| return 0; |
| |
| out_error: |
| for (nr_cpu = 0; nr_cpu < nr_cpu_ids; nr_cpu++) { |
| if (siw_tx_thread[nr_cpu]) { |
| siw_stop_tx_thread(nr_cpu); |
| siw_tx_thread[nr_cpu] = NULL; |
| } |
| } |
| if (siw_crypto_shash) |
| crypto_free_shash(siw_crypto_shash); |
| |
| pr_info("SoftIWARP attach failed. Error: %d\n", rv); |
| |
| siw_cm_exit(); |
| siw_destroy_cpulist(); |
| |
| return rv; |
| } |
| |
| static void __exit siw_exit_module(void) |
| { |
| int cpu; |
| |
| for_each_possible_cpu(cpu) { |
| if (siw_tx_thread[cpu]) { |
| siw_stop_tx_thread(cpu); |
| siw_tx_thread[cpu] = NULL; |
| } |
| } |
| unregister_netdevice_notifier(&siw_netdev_nb); |
| rdma_link_unregister(&siw_link_ops); |
| ib_unregister_driver(RDMA_DRIVER_SIW); |
| |
| siw_cm_exit(); |
| |
| siw_destroy_cpulist(); |
| |
| if (siw_crypto_shash) |
| crypto_free_shash(siw_crypto_shash); |
| |
| pr_info("SoftiWARP detached\n"); |
| } |
| |
| module_init(siw_init_module); |
| module_exit(siw_exit_module); |
| |
| MODULE_ALIAS_RDMA_LINK("siw"); |