rdma/siw: network and RDMA core interface
Broken up commit to add the Soft iWarp RDMA driver. Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Bernard Metzler
Jason Gunthorpe
Родитель
a531975279
Коммит
bdcf26bf9b
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@ -0,0 +1,687 @@
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// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
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/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
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/* Copyright (c) 2008-2019, IBM Corporation */
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <net/net_namespace.h>
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#include <linux/rtnetlink.h>
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#include <linux/if_arp.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/rdma_netlink.h>
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#include <linux/kthread.h>
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#include "siw.h"
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#include "siw_verbs.h"
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MODULE_AUTHOR("Bernard Metzler");
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MODULE_DESCRIPTION("Software iWARP Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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/* transmit from user buffer, if possible */
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const bool zcopy_tx = true;
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/* Restrict usage of GSO, if hardware peer iwarp is unable to process
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* large packets. try_gso = true lets siw try to use local GSO,
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* if peer agrees. Not using GSO severly limits siw maximum tx bandwidth.
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*/
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const bool try_gso;
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/* Attach siw also with loopback devices */
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const bool loopback_enabled = true;
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/* We try to negotiate CRC on, if true */
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const bool mpa_crc_required;
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/* MPA CRC on/off enforced */
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const bool mpa_crc_strict;
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/* Control TCP_NODELAY socket option */
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const bool siw_tcp_nagle;
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/* Select MPA version to be used during connection setup */
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u_char mpa_version = MPA_REVISION_2;
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/* Selects MPA P2P mode (additional handshake during connection
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* setup, if true.
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*/
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const bool peer_to_peer;
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struct task_struct *siw_tx_thread[NR_CPUS];
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struct crypto_shash *siw_crypto_shash;
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static int siw_device_register(struct siw_device *sdev, const char *name)
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{
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struct ib_device *base_dev = &sdev->base_dev;
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static int dev_id = 1;
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int rv;
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rv = ib_register_device(base_dev, name);
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if (rv) {
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pr_warn("siw: device registration error %d\n", rv);
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return rv;
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}
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sdev->vendor_part_id = dev_id++;
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siw_dbg(base_dev, "HWaddr=%pM\n", sdev->netdev->dev_addr);
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return 0;
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}
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static void siw_device_cleanup(struct ib_device *base_dev)
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{
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struct siw_device *sdev = to_siw_dev(base_dev);
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xa_destroy(&sdev->qp_xa);
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xa_destroy(&sdev->mem_xa);
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}
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static int siw_create_tx_threads(void)
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{
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int cpu, rv, assigned = 0;
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for_each_online_cpu(cpu) {
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/* Skip HT cores */
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if (cpu % cpumask_weight(topology_sibling_cpumask(cpu)))
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continue;
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siw_tx_thread[cpu] =
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kthread_create(siw_run_sq, (unsigned long *)(long)cpu,
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"siw_tx/%d", cpu);
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if (IS_ERR(siw_tx_thread[cpu])) {
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rv = PTR_ERR(siw_tx_thread[cpu]);
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siw_tx_thread[cpu] = NULL;
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pr_info("Creating TX thread for CPU %d failed", cpu);
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continue;
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}
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kthread_bind(siw_tx_thread[cpu], cpu);
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wake_up_process(siw_tx_thread[cpu]);
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assigned++;
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}
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return assigned;
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}
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static int siw_dev_qualified(struct net_device *netdev)
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{
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/*
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* Additional hardware support can be added here
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* (e.g. ARPHRD_FDDI, ARPHRD_ATM, ...) - see
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* <linux/if_arp.h> for type identifiers.
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*/
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if (netdev->type == ARPHRD_ETHER || netdev->type == ARPHRD_IEEE802 ||
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(netdev->type == ARPHRD_LOOPBACK && loopback_enabled))
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return 1;
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return 0;
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}
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static DEFINE_PER_CPU(atomic_t, use_cnt = ATOMIC_INIT(0));
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static struct {
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struct cpumask **tx_valid_cpus;
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int num_nodes;
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} siw_cpu_info;
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static int siw_init_cpulist(void)
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{
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int i, num_nodes = num_possible_nodes();
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memset(siw_tx_thread, 0, sizeof(siw_tx_thread));
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siw_cpu_info.num_nodes = num_nodes;
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siw_cpu_info.tx_valid_cpus =
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kcalloc(num_nodes, sizeof(struct cpumask *), GFP_KERNEL);
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if (!siw_cpu_info.tx_valid_cpus) {
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siw_cpu_info.num_nodes = 0;
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return -ENOMEM;
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}
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for (i = 0; i < siw_cpu_info.num_nodes; i++) {
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siw_cpu_info.tx_valid_cpus[i] =
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kzalloc(sizeof(struct cpumask), GFP_KERNEL);
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if (!siw_cpu_info.tx_valid_cpus[i])
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goto out_err;
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cpumask_clear(siw_cpu_info.tx_valid_cpus[i]);
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}
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for_each_possible_cpu(i)
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cpumask_set_cpu(i, siw_cpu_info.tx_valid_cpus[cpu_to_node(i)]);
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return 0;
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out_err:
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siw_cpu_info.num_nodes = 0;
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while (i) {
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kfree(siw_cpu_info.tx_valid_cpus[i]);
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siw_cpu_info.tx_valid_cpus[i--] = NULL;
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}
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kfree(siw_cpu_info.tx_valid_cpus);
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siw_cpu_info.tx_valid_cpus = NULL;
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return -ENOMEM;
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}
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static void siw_destroy_cpulist(void)
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{
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int i = 0;
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while (i < siw_cpu_info.num_nodes)
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kfree(siw_cpu_info.tx_valid_cpus[i++]);
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kfree(siw_cpu_info.tx_valid_cpus);
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}
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/*
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* Choose CPU with least number of active QP's from NUMA node of
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* TX interface.
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*/
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int siw_get_tx_cpu(struct siw_device *sdev)
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{
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const struct cpumask *tx_cpumask;
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int i, num_cpus, cpu, min_use, node = sdev->numa_node, tx_cpu = -1;
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if (node < 0)
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tx_cpumask = cpu_online_mask;
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else
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tx_cpumask = siw_cpu_info.tx_valid_cpus[node];
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num_cpus = cpumask_weight(tx_cpumask);
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if (!num_cpus) {
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/* no CPU on this NUMA node */
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tx_cpumask = cpu_online_mask;
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num_cpus = cpumask_weight(tx_cpumask);
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}
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if (!num_cpus)
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goto out;
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cpu = cpumask_first(tx_cpumask);
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for (i = 0, min_use = SIW_MAX_QP; i < num_cpus;
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i++, cpu = cpumask_next(cpu, tx_cpumask)) {
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int usage;
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/* Skip any cores which have no TX thread */
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if (!siw_tx_thread[cpu])
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continue;
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usage = atomic_read(&per_cpu(use_cnt, cpu));
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if (usage <= min_use) {
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tx_cpu = cpu;
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min_use = usage;
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}
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}
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siw_dbg(&sdev->base_dev,
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"tx cpu %d, node %d, %d qp's\n", tx_cpu, node, min_use);
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out:
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if (tx_cpu >= 0)
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atomic_inc(&per_cpu(use_cnt, tx_cpu));
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else
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pr_warn("siw: no tx cpu found\n");
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return tx_cpu;
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}
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void siw_put_tx_cpu(int cpu)
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{
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atomic_dec(&per_cpu(use_cnt, cpu));
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}
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static struct ib_qp *siw_get_base_qp(struct ib_device *base_dev, int id)
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{
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struct siw_qp *qp = siw_qp_id2obj(to_siw_dev(base_dev), id);
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if (qp) {
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/*
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* siw_qp_id2obj() increments object reference count
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*/
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siw_qp_put(qp);
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return qp->ib_qp;
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}
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return NULL;
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}
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static void siw_verbs_sq_flush(struct ib_qp *base_qp)
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{
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struct siw_qp *qp = to_siw_qp(base_qp);
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down_write(&qp->state_lock);
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siw_sq_flush(qp);
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up_write(&qp->state_lock);
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}
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static void siw_verbs_rq_flush(struct ib_qp *base_qp)
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{
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struct siw_qp *qp = to_siw_qp(base_qp);
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down_write(&qp->state_lock);
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siw_rq_flush(qp);
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up_write(&qp->state_lock);
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}
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static const struct ib_device_ops siw_device_ops = {
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.owner = THIS_MODULE,
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.uverbs_abi_ver = SIW_ABI_VERSION,
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.driver_id = RDMA_DRIVER_SIW,
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.alloc_mr = siw_alloc_mr,
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.alloc_pd = siw_alloc_pd,
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.alloc_ucontext = siw_alloc_ucontext,
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.create_cq = siw_create_cq,
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.create_qp = siw_create_qp,
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.create_srq = siw_create_srq,
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.dealloc_driver = siw_device_cleanup,
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.dealloc_pd = siw_dealloc_pd,
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.dealloc_ucontext = siw_dealloc_ucontext,
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.dereg_mr = siw_dereg_mr,
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.destroy_cq = siw_destroy_cq,
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.destroy_qp = siw_destroy_qp,
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.destroy_srq = siw_destroy_srq,
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.drain_rq = siw_verbs_rq_flush,
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.drain_sq = siw_verbs_sq_flush,
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.get_dma_mr = siw_get_dma_mr,
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.get_port_immutable = siw_get_port_immutable,
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.iw_accept = siw_accept,
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.iw_add_ref = siw_qp_get_ref,
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.iw_connect = siw_connect,
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.iw_create_listen = siw_create_listen,
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.iw_destroy_listen = siw_destroy_listen,
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.iw_get_qp = siw_get_base_qp,
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.iw_reject = siw_reject,
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.iw_rem_ref = siw_qp_put_ref,
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.map_mr_sg = siw_map_mr_sg,
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.mmap = siw_mmap,
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.modify_qp = siw_verbs_modify_qp,
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.modify_srq = siw_modify_srq,
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.poll_cq = siw_poll_cq,
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.post_recv = siw_post_receive,
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.post_send = siw_post_send,
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.post_srq_recv = siw_post_srq_recv,
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.query_device = siw_query_device,
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.query_gid = siw_query_gid,
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.query_pkey = siw_query_pkey,
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.query_port = siw_query_port,
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.query_qp = siw_query_qp,
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.query_srq = siw_query_srq,
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.req_notify_cq = siw_req_notify_cq,
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.reg_user_mr = siw_reg_user_mr,
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INIT_RDMA_OBJ_SIZE(ib_cq, siw_cq, base_cq),
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INIT_RDMA_OBJ_SIZE(ib_pd, siw_pd, base_pd),
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INIT_RDMA_OBJ_SIZE(ib_srq, siw_srq, base_srq),
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INIT_RDMA_OBJ_SIZE(ib_ucontext, siw_ucontext, base_ucontext),
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};
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static struct siw_device *siw_device_create(struct net_device *netdev)
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{
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struct siw_device *sdev = NULL;
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struct ib_device *base_dev;
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struct device *parent = netdev->dev.parent;
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int rv;
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if (!parent) {
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/*
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* The loopback device has no parent device,
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* so it appears as a top-level device. To support
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* loopback device connectivity, take this device
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* as the parent device. Skip all other devices
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* w/o parent device.
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*/
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if (netdev->type != ARPHRD_LOOPBACK) {
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pr_warn("siw: device %s error: no parent device\n",
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netdev->name);
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return NULL;
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}
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parent = &netdev->dev;
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}
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sdev = ib_alloc_device(siw_device, base_dev);
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if (!sdev)
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return NULL;
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base_dev = &sdev->base_dev;
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sdev->netdev = netdev;
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if (netdev->type != ARPHRD_LOOPBACK) {
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memcpy(&base_dev->node_guid, netdev->dev_addr, 6);
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} else {
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/*
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* The loopback device does not have a HW address,
|
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* but connection mangagement lib expects gid != 0
|
||||
*/
|
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size_t gidlen = min_t(size_t, strlen(base_dev->name), 6);
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memcpy(&base_dev->node_guid, base_dev->name, gidlen);
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}
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base_dev->uverbs_cmd_mask =
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(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
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(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
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(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
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(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
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(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
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(1ull << IB_USER_VERBS_CMD_REG_MR) |
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(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
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(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
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(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
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(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
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(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
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(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
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(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
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(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
|
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(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
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(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
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(1ull << IB_USER_VERBS_CMD_POST_SEND) |
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(1ull << IB_USER_VERBS_CMD_POST_RECV) |
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(1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
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(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV) |
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(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
|
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(1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
|
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(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
|
||||
|
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base_dev->node_type = RDMA_NODE_RNIC;
|
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memcpy(base_dev->node_desc, SIW_NODE_DESC_COMMON,
|
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sizeof(SIW_NODE_DESC_COMMON));
|
||||
|
||||
/*
|
||||
* Current model (one-to-one device association):
|
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* One Softiwarp device per net_device or, equivalently,
|
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* per physical port.
|
||||
*/
|
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base_dev->phys_port_cnt = 1;
|
||||
base_dev->dev.parent = parent;
|
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base_dev->dev.dma_ops = &dma_virt_ops;
|
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base_dev->num_comp_vectors = num_possible_cpus();
|
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|
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ib_set_device_ops(base_dev, &siw_device_ops);
|
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rv = ib_device_set_netdev(base_dev, netdev, 1);
|
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if (rv)
|
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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;
|
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sdev->attrs.max_ird = SIW_MAX_IRD_QP;
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sdev->attrs.max_sge = SIW_MAX_SGE;
|
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sdev->attrs.max_sge_rd = SIW_MAX_SGE_RD;
|
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sdev->attrs.max_cq = SIW_MAX_CQ;
|
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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");
|
||||
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");
|
||||
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