Signed-off-by: Bernard Metzler <bmt@xxxxxxxxxxxxxx>
---
drivers/infiniband/sw/siw/siw_main.c | 752 +++++++++++++++++++++++++++++++++++
1 file changed, 752 insertions(+)
create mode 100644 drivers/infiniband/sw/siw/siw_main.c
diff --git a/drivers/infiniband/sw/siw/siw_main.c b/drivers/infiniband/sw/siw/siw_main.c
new file mode 100644
index 000000000000..5a054c6becaa
--- /dev/null
+++ b/drivers/infiniband/sw/siw/siw_main.c
@@ -0,0 +1,752 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@xxxxxxxxxxxxxx>
+ *
+ * Copyright (c) 2008-2017, IBM Corporation
+ *
+ * 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:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of IBM nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#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/dma-mapping.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+
+#include "siw.h"
+#include "siw_obj.h"
+#include "siw_cm.h"
+#include "siw_verbs.h"
+#include <linux/kthread.h>
+
+
+MODULE_AUTHOR("Bernard Metzler");
+MODULE_DESCRIPTION("Software iWARP Driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION("0.2");
+
+#define SIW_MAX_IF 12
+static int if_cnt;
+static char *iface_list[SIW_MAX_IF] = {[0 ... (SIW_MAX_IF-1)] = '\0'};
+module_param_array(iface_list, charp, &if_cnt, 0444);
+MODULE_PARM_DESC(iface_list, "Interface list siw attaches to if present");
+
+static bool loopback_enabled = 1;
+module_param(loopback_enabled, bool, 0644);
+MODULE_PARM_DESC(loopback_enabled, "enable_loopback");
+
+LIST_HEAD(siw_devlist);
+
+static int cpu_cnt;
+static char *tx_cpu_list[MAX_CPU] = {[0 ... (MAX_CPU-1)] = '\0'};
+module_param_array(tx_cpu_list, charp, &cpu_cnt, 0444);
+MODULE_PARM_DESC(tx_cpu_list, "List of CPUs siw TX thread shall be bound to");
+
+int default_tx_cpu = -1;
+struct task_struct *qp_tx_thread[MAX_CPU];
+struct crypto_shash *siw_crypto_shash;
+
+static ssize_t show_sw_version(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct siw_dev *sdev = container_of(dev, struct siw_dev, ofa_dev.dev);
+
+ return sprintf(buf, "%x\n", sdev->attrs.version);
+}
+
+static DEVICE_ATTR(sw_version, 0444, show_sw_version, NULL);
+
+static struct device_attribute *siw_dev_attributes[] = {
+ &dev_attr_sw_version
+};
+
+static void siw_device_release(struct device *dev)
+{
+ pr_info("%s device released\n", dev_name(dev));
+}
+
+static struct device siw_generic_dma_device = {
+ .dma_ops = &siw_dma_generic_ops,
+ .init_name = "software-rdma-v2",
+ .release = siw_device_release
+};
+
+static struct bus_type siw_bus = {
+ .name = "siw",
+};
+
+static int siw_modify_port(struct ib_device *ofa_dev, u8 port, int mask,
+ struct ib_port_modify *props)
+{
+ return -EOPNOTSUPP;
+}
+
+
+static void siw_device_register(struct siw_dev *sdev)
+{
+ struct ib_device *ofa_dev = &sdev->ofa_dev;
+ int rv, i;
+ static int dev_id = 1;
+
+ rv = ib_register_device(ofa_dev, NULL);
+ if (rv) {
+ dprint(DBG_DM|DBG_ON, " %s: ib register error: rv=%d\n",
+ ofa_dev->name, rv);
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(siw_dev_attributes); ++i) {
+ rv = device_create_file(&ofa_dev->dev, siw_dev_attributes[i]);
+ if (rv) {
+ dprint(DBG_DM|DBG_ON, " %s: create file error: rv=%d\n",
+ ofa_dev->name, rv);
+ ib_unregister_device(ofa_dev);
+ return;
+ }
+ }
+ siw_debugfs_add_device(sdev);
+
+ sdev->attrs.vendor_part_id = dev_id++;
+
+ dprint(DBG_DM, ": '%s' at '%s', HWaddr=%02x.%02x.%02x.%02x.%02x.%02x\n",
+ ofa_dev->name, sdev->netdev->name,
+ *(u8 *)sdev->netdev->dev_addr,
+ *((u8 *)sdev->netdev->dev_addr + 1),
+ *((u8 *)sdev->netdev->dev_addr + 2),
+ *((u8 *)sdev->netdev->dev_addr + 3),
+ *((u8 *)sdev->netdev->dev_addr + 4),
+ *((u8 *)sdev->netdev->dev_addr + 5));
+
+ sdev->is_registered = 1;
+}
+
+static void siw_device_deregister(struct siw_dev *sdev)
+{
+ int i;
+
+ siw_debugfs_del_device(sdev);
+
+ if (sdev->is_registered) {
+
+ dprint(DBG_DM, ": deregister %s at %s\n", sdev->ofa_dev.name,
+ sdev->netdev->name);
+
+ for (i = 0; i < ARRAY_SIZE(siw_dev_attributes); ++i)
+ device_remove_file(&sdev->ofa_dev.dev,
+ siw_dev_attributes[i]);
+
+ ib_unregister_device(&sdev->ofa_dev);
+ }
+ if (atomic_read(&sdev->num_ctx) || atomic_read(&sdev->num_srq) ||
+ atomic_read(&sdev->num_mem) || atomic_read(&sdev->num_cep) ||
+ atomic_read(&sdev->num_qp) || atomic_read(&sdev->num_cq) ||
+ atomic_read(&sdev->num_pd)) {
+ pr_warn("SIW at %s: orphaned resources!\n", sdev->netdev->name);
+ pr_warn("CTX %d, SRQ %d, QP %d, CQ %d, MEM %d, CEP %d, PD %d\n",
+ atomic_read(&sdev->num_ctx),
+ atomic_read(&sdev->num_srq),
+ atomic_read(&sdev->num_qp),
+ atomic_read(&sdev->num_cq),
+ atomic_read(&sdev->num_mem),
+ atomic_read(&sdev->num_cep),
+ atomic_read(&sdev->num_pd));
+ }
+ i = 0;
+
+ while (!list_empty(&sdev->cep_list)) {
+ struct siw_cep *cep = list_entry(sdev->cep_list.next,
+ struct siw_cep, devq);
+ list_del(&cep->devq);
+ dprint(DBG_ON, ": Free CEP (0x%p), state: %d\n",
+ cep, cep->state);
+ kfree(cep);
+ i++;
+ }
+ if (i)
+ pr_warn("%s: free'd %d CEPs\n", __func__, i);
+
+ sdev->is_registered = 0;
+}
+
+static void siw_device_destroy(struct siw_dev *sdev)
+{
+ dprint(DBG_DM, ": destroy siw device at %s\n", sdev->netdev->name);
+
+ siw_idr_release(sdev);
+ kfree(sdev->ofa_dev.iwcm);
+ dev_put(sdev->netdev);
+ ib_dealloc_device(&sdev->ofa_dev);
+}
+
+
+static int siw_match_iflist(struct net_device *dev)
+{
+ int i;
+
+ if (if_cnt == 0)
+ return 1;
+
+ if_cnt = min_t(int, SIW_MAX_IF, if_cnt);
+
+ for (i = 0; i < if_cnt; i++)
+ if (!strcmp(iface_list[i], dev->name))
+ return 1;
+ return 0;
+}
+
+static struct siw_dev *siw_dev_from_netdev(struct net_device *dev)
+{
+ if (!list_empty(&siw_devlist)) {
+ struct list_head *pos;
+
+ list_for_each(pos, &siw_devlist) {
+ struct siw_dev *sdev =
+ list_entry(pos, struct siw_dev, list);
+ if (sdev->netdev == dev)
+ return sdev;
+ }
+ }
+ return NULL;
+}
+
+static int siw_tx_qualified(int cpu)
+{
+ int i;
+
+ if (cpu_cnt == 0)
+ return 1;
+
+ for (i = 0; i < cpu_cnt; i++) {
+ int new_cpu;
+
+ if (kstrtoint(tx_cpu_list[i], 0, &new_cpu))
+ continue;
+ if (cpu == new_cpu)
+ return 1;
+ }
+ return 0;
+}
+
+static int siw_create_tx_threads(int max_threads, int check_qualified)
+{
+ int cpu, rv, assigned = 0;
+
+ if (max_threads < 0 || max_threads > MAX_CPU)
+ return 0;
+
+ for_each_online_cpu(cpu) {
+ if (siw_tx_qualified(cpu)) {
+ qp_tx_thread[cpu] =
+ kthread_create(siw_run_sq,
+ (unsigned long *)(long)cpu,
+ "qp_tx_thread/%d", cpu);
+ kthread_bind(qp_tx_thread[cpu], cpu);
+ if (IS_ERR(qp_tx_thread)) {
+ rv = PTR_ERR(qp_tx_thread);
+ qp_tx_thread[cpu] = NULL;
+ pr_info("Binding TX thread to CPU %d failed",
+ cpu);
+ break;
+ }
+ wake_up_process(qp_tx_thread[cpu]);
+ assigned++;
+ if (default_tx_cpu < 0)
+ default_tx_cpu = cpu;
+ if (assigned >= max_threads)
+ break;
+ }
+ }
+ return assigned;
+}
+
+static int siw_dev_qualified(struct net_device *netdev)
+{
+ if (!siw_match_iflist(netdev)) {
+ dprint(DBG_DM, ": %s (not selected)\n",
+ netdev->name);
+ return 0;
+ }
+ /*
+ * 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_INFINIBAND ||
+ (netdev->type == ARPHRD_LOOPBACK && loopback_enabled))
+ return 1;
+
+ return 0;
+}
+
+static void siw_verbs_sq_flush(struct ib_qp *ofa_qp)
+{
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+
+ down_write(&qp->state_lock);
+ siw_sq_flush(qp);
+ up_write(&qp->state_lock);
+}
+
+static void siw_verbs_rq_flush(struct ib_qp *ofa_qp)
+{
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+
+ down_write(&qp->state_lock);
+ siw_rq_flush(qp);
+ up_write(&qp->state_lock);
+}
+
+static struct ib_ah *siw_create_ah(struct ib_pd *pd, struct rdma_ah_attr *attr,
+ struct ib_udata *udata)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static int siw_destroy_ah(struct ib_ah *ah)
+{
+ return -EOPNOTSUPP;
+}
+
+
+static struct siw_dev *siw_device_create(struct net_device *netdev)
+{
+ struct siw_dev *sdev = (struct siw_dev *)ib_alloc_device(sizeof(*sdev));
+ struct ib_device *ofa_dev;
+
+ if (!sdev)
+ goto out;
+
+ ofa_dev = &sdev->ofa_dev;
+
+ ofa_dev->iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
+ if (!ofa_dev->iwcm) {
+ ib_dealloc_device(ofa_dev);
+ sdev = NULL;
+ goto out;
+ }
+
+ sdev->netdev = netdev;
+ list_add_tail(&sdev->list, &siw_devlist);
+
+ strcpy(ofa_dev->name, SIW_IBDEV_PREFIX);
+ strlcpy(ofa_dev->name + strlen(SIW_IBDEV_PREFIX), netdev->name,
+ IB_DEVICE_NAME_MAX - strlen(SIW_IBDEV_PREFIX));
+
+ memset(&ofa_dev->node_guid, 0, sizeof(ofa_dev->node_guid));
+ if (netdev->type != ARPHRD_LOOPBACK)
+ memcpy(&ofa_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(ofa_dev->name), 6);
+
+ memcpy(&ofa_dev->node_guid, ofa_dev->name, gidlen);
+ }
+ ofa_dev->owner = THIS_MODULE;
+
+ ofa_dev->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_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_MODIFY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
+
+ ofa_dev->node_type = RDMA_NODE_RNIC;
+ memcpy(ofa_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.
+ */
+ ofa_dev->phys_port_cnt = 1;
+
+ ofa_dev->num_comp_vectors = num_possible_cpus();
+ ofa_dev->dev.parent = &siw_generic_dma_device;
+ ofa_dev->query_device = siw_query_device;
+ ofa_dev->query_port = siw_query_port;
+ ofa_dev->get_port_immutable = siw_get_port_immutable;
+ ofa_dev->query_qp = siw_query_qp;
+ ofa_dev->modify_port = siw_modify_port;
+ ofa_dev->query_pkey = siw_query_pkey;
+ ofa_dev->query_gid = siw_query_gid;
+ ofa_dev->alloc_ucontext = siw_alloc_ucontext;
+ ofa_dev->dealloc_ucontext = siw_dealloc_ucontext;
+ ofa_dev->mmap = siw_mmap;
+ ofa_dev->alloc_pd = siw_alloc_pd;
+ ofa_dev->dealloc_pd = siw_dealloc_pd;
+ ofa_dev->create_ah = siw_create_ah;
+ ofa_dev->destroy_ah = siw_destroy_ah;
+ ofa_dev->create_qp = siw_create_qp;
+ ofa_dev->modify_qp = siw_verbs_modify_qp;
+ ofa_dev->destroy_qp = siw_destroy_qp;
+ ofa_dev->create_cq = siw_create_cq;
+ ofa_dev->destroy_cq = siw_destroy_cq;
+ ofa_dev->resize_cq = NULL;
+ ofa_dev->poll_cq = siw_poll_cq;
+ ofa_dev->get_dma_mr = siw_get_dma_mr;
+ ofa_dev->reg_user_mr = siw_reg_user_mr;
+ ofa_dev->dereg_mr = siw_dereg_mr;
+ ofa_dev->alloc_mr = siw_alloc_mr;
+ ofa_dev->map_mr_sg = siw_map_mr_sg;
+ ofa_dev->dealloc_mw = NULL;
+
+ ofa_dev->create_srq = siw_create_srq;
+ ofa_dev->modify_srq = siw_modify_srq;
+ ofa_dev->query_srq = siw_query_srq;
+ ofa_dev->destroy_srq = siw_destroy_srq;
+ ofa_dev->post_srq_recv = siw_post_srq_recv;
+
+ ofa_dev->attach_mcast = NULL;
+ ofa_dev->detach_mcast = NULL;
+ ofa_dev->process_mad = siw_no_mad;
+
+ ofa_dev->req_notify_cq = siw_req_notify_cq;
+ ofa_dev->post_send = siw_post_send;
+ ofa_dev->post_recv = siw_post_receive;
+
+ ofa_dev->drain_sq = siw_verbs_sq_flush;
+ ofa_dev->drain_rq = siw_verbs_rq_flush;
+
+ ofa_dev->dev.dma_ops = &dma_virt_ops;
+
+ ofa_dev->iwcm->connect = siw_connect;
+ ofa_dev->iwcm->accept = siw_accept;
+ ofa_dev->iwcm->reject = siw_reject;
+ ofa_dev->iwcm->create_listen = siw_create_listen;
+ ofa_dev->iwcm->destroy_listen = siw_destroy_listen;
+ ofa_dev->iwcm->add_ref = siw_qp_get_ref;
+ ofa_dev->iwcm->rem_ref = siw_qp_put_ref;
+ ofa_dev->iwcm->get_qp = siw_get_ofaqp;
+
+ sdev->attrs.version = VERSION_ID_SOFTIWARP;
+ sdev->attrs.vendor_id = SIW_VENDOR_ID;
+ sdev->attrs.vendor_part_id = SIW_VENDORT_PART_ID;
+ sdev->attrs.sw_version = VERSION_ID_SOFTIWARP;
+ 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.cap_flags = IB_DEVICE_MEM_MGT_EXTENSIONS;
+ 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_mr_size = rlimit(RLIMIT_MEMLOCK);
+ 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;
+
+ siw_idr_init(sdev);
+ 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_mem, 0);
+ atomic_set(&sdev->num_pd, 0);
+ atomic_set(&sdev->num_cep, 0);
+
+ sdev->is_registered = 0;
+out:
+ if (sdev)
+ dev_hold(netdev);
+
+ return sdev;
+}
+
+
+
+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 in_device *in_dev;
+ struct siw_dev *sdev;
+
+ dprint(DBG_DM, " (dev=%s): Event %lu\n", netdev->name, event);
+
+ if (dev_net(netdev) != &init_net)
+ goto done;
+
+ sdev = siw_dev_from_netdev(netdev);
+
+ switch (event) {
+
+ case NETDEV_UP:
+ if (!sdev)
+ break;
+
+ if (sdev->is_registered) {
+ sdev->state = IB_PORT_ACTIVE;
+ siw_port_event(sdev, 1, IB_EVENT_PORT_ACTIVE);
+ break;
+ }
+
+ in_dev = in_dev_get(netdev);
+ if (!in_dev) {
+ dprint(DBG_DM, ": %s: no in_dev\n", netdev->name);
+ sdev->state = IB_PORT_INIT;
+ break;
+ }
+
+ if (in_dev->ifa_list) {
+ sdev->state = IB_PORT_ACTIVE;
+ siw_device_register(sdev);
+ } else {
+ dprint(DBG_DM, ": %s: no ifa\n", netdev->name);
+ sdev->state = IB_PORT_INIT;
+ }
+ in_dev_put(in_dev);
+
+ break;
+
+ case NETDEV_DOWN:
+ if (sdev && sdev->is_registered) {
+ sdev->state = IB_PORT_DOWN;
+ siw_port_event(sdev, 1, IB_EVENT_PORT_ERR);
+ break;
+ }
+ break;
+
+ case NETDEV_REGISTER:
+ if (!sdev) {
+ if (!siw_dev_qualified(netdev))
+ break;
+
+ sdev = siw_device_create(netdev);
+ if (sdev) {
+ sdev->state = IB_PORT_INIT;
+ dprint(DBG_DM, ": new siw device for %s\n",
+ netdev->name);
+ }
+ }
+ break;
+
+ case NETDEV_UNREGISTER:
+ if (sdev) {
+ if (sdev->is_registered)
+ siw_device_deregister(sdev);
+ list_del(&sdev->list);
+ siw_device_destroy(sdev);
+ }
+ break;
+
+ case NETDEV_CHANGEADDR:
+ if (sdev->is_registered)
+ siw_port_event(sdev, 1, IB_EVENT_LID_CHANGE);
+
+ break;
+ /*
+ * Todo: Below netdev events are currently not handled.
+ */
+ case NETDEV_CHANGEMTU:
+ case NETDEV_GOING_DOWN:
+ case NETDEV_CHANGE:
+
+ break;
+
+ default:
+ break;
+ }
+done:
+ return NOTIFY_OK;
+}
+
+static struct notifier_block siw_netdev_nb = {
+ .notifier_call = siw_netdev_event,
+};
+
+/*
+ * siw_init_module - Initialize Softiwarp module and register with netdev
+ * subsystem to create Softiwarp devices per net_device
+ */
+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;
+ }
+ /*
+ * The xprtrdma module needs at least some rudimentary bus to set
+ * some devices path MTU.
+ */
+ rv = bus_register(&siw_bus);
+ if (rv)
+ goto out_nobus;
+
+ siw_generic_dma_device.bus = &siw_bus;
+
+ rv = device_register(&siw_generic_dma_device);
+ if (rv)
+ goto out;
+
+ rv = siw_cm_init();
+ if (rv)
+ goto out_unregister;
+
+ if (DPRINT_MASK)
+ siw_debug_init();
+
+ /*
+ * Allocate CRC SHASH object. Fail loading siw only, if CRC is
+ * required by kernel module
+ */
+ 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 == true)
+ goto out_unregister;
+ }
+ rv = register_netdevice_notifier(&siw_netdev_nb);
+ if (rv) {
+ siw_debugfs_delete();
+ goto out_unregister;
+ }
+ for (nr_cpu = 0; nr_cpu < MAX_CPU; nr_cpu++)
+ qp_tx_thread[nr_cpu] = NULL;
+
+ if (siw_create_tx_threads(MAX_CPU, 1) == 0) {
+ pr_info("Try starting default TX thread\n");
+ if (siw_create_tx_threads(1, 0) == 0) {
+ pr_info("Could not start any TX thread\n");
+ goto out_unregister;
+ }
+ }
+ pr_info("SoftiWARP attached\n");
+ return 0;
+
+out_unregister:
+ for (nr_cpu = 0; nr_cpu < MAX_CPU; nr_cpu++) {
+ if (qp_tx_thread[nr_cpu]) {
+ siw_stop_tx_thread(nr_cpu);
+ qp_tx_thread[nr_cpu] = NULL;
+ }
+ }
+ device_unregister(&siw_generic_dma_device);
+
+ if (siw_crypto_shash)
+ crypto_free_shash(siw_crypto_shash);
+out:
+ bus_unregister(&siw_bus);
+out_nobus:
+ pr_info("SoftIWARP attach failed. Error: %d\n", rv);
+ siw_cm_exit();
+
+ return rv;
+}
+
+
+static void __exit siw_exit_module(void)
+{
+ int nr_cpu;
+
+ for (nr_cpu = 0; nr_cpu < MAX_CPU; nr_cpu++) {
+ if (qp_tx_thread[nr_cpu]) {
+ siw_stop_tx_thread(nr_cpu);
+ qp_tx_thread[nr_cpu] = NULL;
+ }
+ }
+ unregister_netdevice_notifier(&siw_netdev_nb);
+
+ siw_cm_exit();
+
+ while (!list_empty(&siw_devlist)) {
+ struct siw_dev *sdev =
+ list_entry(siw_devlist.next, struct siw_dev, list);
+ list_del(&sdev->list);
+ if (sdev->is_registered)
+ siw_device_deregister(sdev);
+
+ siw_device_destroy(sdev);
+ }
+ if (siw_crypto_shash)
+ crypto_free_shash(siw_crypto_shash);
+
+ siw_debugfs_delete();
+
+ device_unregister(&siw_generic_dma_device);
+
+ bus_unregister(&siw_bus);
+
+ pr_info("SoftiWARP detached\n");
+}
+
+module_init(siw_init_module);
+module_exit(siw_exit_module);
--
2.13.6
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