static void
rdsv3_ib_qp_event_handler(struct ib_event *event, void *data)
{
struct rdsv3_connection *conn = data;
struct rdsv3_ib_connection *ic = conn->c_transport_data;
RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler", "conn %p ic %p event %u",
conn, ic, event->event);
switch (event->event) {
case IB_EVENT_COMM_EST:
(void) rdma_notify(ic->i_cm_id, IB_EVENT_COMM_EST);
break;
default:
if (conn) {
RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler",
"RDS/IB: Fatal QP Event %u - "
"connection %u.%u.%u.%u ->%u.%u.%u.%u "
"...reconnecting",
event->event, NIPQUAD(conn->c_laddr),
NIPQUAD(conn->c_faddr));
rdsv3_conn_drop(conn);
} else {
RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler",
"RDS/IB: Fatal QP Event %u - connection"
"...reconnecting", event->event);
}
break;
}
RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler", "Return conn: %p event: %p",
conn, event);
}
static void
sdp_rx_comp_work(struct work_struct *work)
{
struct sdp_sock *ssk = container_of(work, struct sdp_sock,
rx_comp_work);
sdp_prf(ssk->socket, NULL, "%s", __func__);
SDP_WLOCK(ssk);
if (unlikely(!ssk->qp)) {
sdp_prf(ssk->socket, NULL, "qp was destroyed");
goto out;
}
if (unlikely(!ssk->rx_ring.cq)) {
sdp_prf(ssk->socket, NULL, "rx_ring.cq is NULL");
goto out;
}
if (unlikely(!ssk->poll_cq)) {
struct rdma_cm_id *id = ssk->id;
if (id && id->qp)
rdma_notify(id, IB_EVENT_COMM_EST);
goto out;
}
sdp_do_posts(ssk);
out:
SDP_WUNLOCK(ssk);
}
static void rds_ib_qp_event_handler(struct ib_event *event, void *data)
{
struct rds_connection *conn = data;
struct rds_ib_connection *ic = conn->c_transport_data;
rdsdebug("conn %p ic %p event %u\n", conn, ic, event->event);
switch (event->event) {
case IB_EVENT_COMM_EST:
rdma_notify(ic->i_cm_id, IB_EVENT_COMM_EST);
break;
default:
rds_ib_conn_error(conn, "RDS/IB: Fatal QP Event %u "
"- connection %pI4->%pI4, reconnecting\n",
event->event, &conn->c_laddr, &conn->c_faddr);
break;
}
}
/* A vanilla 2.6.19 or older kernel without backported OFED kernel headers. */
static void isert_cq_comp_work_cb(void *ctx)
{
struct isert_cq *cq_desc = ctx;
#else
static void isert_cq_comp_work_cb(struct work_struct *work)
{
struct isert_cq *cq_desc =
container_of(work, struct isert_cq, cq_comp_work);
#endif
int ret;
TRACE_ENTRY();
ret = isert_poll_cq(cq_desc);
if (unlikely(ret < 0)) { /* poll error */
pr_err("ib_poll_cq failed\n");
goto out;
}
ib_req_notify_cq(cq_desc->cq,
IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
/*
* not all HCAs support IB_CQ_REPORT_MISSED_EVENTS,
* so we need to make sure we don't miss any events between
* last call to ib_poll_cq() and ib_req_notify_cq()
*/
isert_poll_cq(cq_desc);
out:
TRACE_EXIT();
return;
}
static void isert_cq_comp_handler(struct ib_cq *cq, void *context)
{
struct isert_cq *cq_desc = context;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
queue_work(cq_desc->cq_workqueue, &cq_desc->cq_comp_work);
#else
queue_work_on(smp_processor_id(), cq_desc->cq_workqueue,
&cq_desc->cq_comp_work);
#endif
}
static const char *ib_event_type_str(enum ib_event_type ev_type)
{
switch (ev_type) {
case IB_EVENT_COMM_EST:
return "COMM_EST";
case IB_EVENT_QP_FATAL:
return "QP_FATAL";
case IB_EVENT_QP_REQ_ERR:
return "QP_REQ_ERR";
case IB_EVENT_QP_ACCESS_ERR:
return "QP_ACCESS_ERR";
case IB_EVENT_SQ_DRAINED:
return "SQ_DRAINED";
case IB_EVENT_PATH_MIG:
return "PATH_MIG";
case IB_EVENT_PATH_MIG_ERR:
return "PATH_MIG_ERR";
case IB_EVENT_QP_LAST_WQE_REACHED:
return "QP_LAST_WQE_REACHED";
case IB_EVENT_CQ_ERR:
return "CQ_ERR";
case IB_EVENT_SRQ_ERR:
return "SRQ_ERR";
case IB_EVENT_SRQ_LIMIT_REACHED:
return "SRQ_LIMIT_REACHED";
case IB_EVENT_PORT_ACTIVE:
return "PORT_ACTIVE";
case IB_EVENT_PORT_ERR:
return "PORT_ERR";
case IB_EVENT_LID_CHANGE:
return "LID_CHANGE";
case IB_EVENT_PKEY_CHANGE:
return "PKEY_CHANGE";
case IB_EVENT_SM_CHANGE:
return "SM_CHANGE";
case IB_EVENT_CLIENT_REREGISTER:
return "CLIENT_REREGISTER";
case IB_EVENT_DEVICE_FATAL:
return "DEVICE_FATAL";
default:
return "UNKNOWN";
}
}
static void isert_async_evt_handler(struct ib_event *async_ev, void *context)
{
struct isert_cq *cq = context;
struct isert_device *isert_dev = cq->dev;
struct ib_device *ib_dev = isert_dev->ib_dev;
char *dev_name = ib_dev->name;
enum ib_event_type ev_type = async_ev->event;
struct isert_connection *isert_conn;
TRACE_ENTRY();
switch (ev_type) {
case IB_EVENT_COMM_EST:
isert_conn = async_ev->element.qp->qp_context;
pr_info("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
isert_conn, isert_conn->cm_id, dev_name,
ib_event_type_str(IB_EVENT_COMM_EST));
/* force "connection established" event */
rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST);
break;
/* rest of QP-related events */
case IB_EVENT_QP_FATAL:
case IB_EVENT_QP_REQ_ERR:
case IB_EVENT_QP_ACCESS_ERR:
case IB_EVENT_SQ_DRAINED:
case IB_EVENT_PATH_MIG:
case IB_EVENT_PATH_MIG_ERR:
case IB_EVENT_QP_LAST_WQE_REACHED:
isert_conn = async_ev->element.qp->qp_context;
pr_err("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
isert_conn, isert_conn->cm_id, dev_name,
ib_event_type_str(ev_type));
break;
/* CQ-related events */
case IB_EVENT_CQ_ERR:
pr_err("dev:%s CQ evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
/* SRQ events */
case IB_EVENT_SRQ_ERR:
case IB_EVENT_SRQ_LIMIT_REACHED:
pr_err("dev:%s SRQ evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
/* Port events */
case IB_EVENT_PORT_ACTIVE:
case IB_EVENT_PORT_ERR:
case IB_EVENT_LID_CHANGE:
case IB_EVENT_PKEY_CHANGE:
case IB_EVENT_SM_CHANGE:
case IB_EVENT_CLIENT_REREGISTER:
pr_err("dev:%s port:%d evt: %s\n",
dev_name, async_ev->element.port_num,
ib_event_type_str(ev_type));
break;
/* HCA events */
case IB_EVENT_DEVICE_FATAL:
pr_err("dev:%s HCA evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
default:
pr_err("dev:%s evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
}
TRACE_EXIT();
}
static struct isert_device *isert_device_create(struct ib_device *ib_dev)
{
struct isert_device *isert_dev;
struct ib_device_attr *dev_attr;
int cqe_num, err;
struct ib_pd *pd;
struct ib_mr *mr;
struct ib_cq *cq;
char wq_name[64];
int i, j;
TRACE_ENTRY();
isert_dev = kzalloc(sizeof(*isert_dev), GFP_KERNEL);
if (unlikely(isert_dev == NULL)) {
pr_err("Failed to allocate iser dev\n");
err = -ENOMEM;
goto out;
}
dev_attr = &isert_dev->device_attr;
err = ib_query_device(ib_dev, dev_attr);
if (unlikely(err)) {
pr_err("Failed to query device, err: %d\n", err);
goto fail_query;
}
isert_dev->num_cqs = min_t(int, num_online_cpus(),
ib_dev->num_comp_vectors);
isert_dev->cq_qps = kzalloc(sizeof(*isert_dev->cq_qps) * isert_dev->num_cqs,
GFP_KERNEL);
if (unlikely(isert_dev->cq_qps == NULL)) {
pr_err("Failed to allocate iser cq_qps\n");
err = -ENOMEM;
goto fail_cq_qps;
}
isert_dev->cq_desc = vmalloc(sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
if (unlikely(isert_dev->cq_desc == NULL)) {
pr_err("Failed to allocate %ld bytes for iser cq_desc\n",
sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
err = -ENOMEM;
goto fail_alloc_cq_desc;
}
pd = ib_alloc_pd(ib_dev);
if (unlikely(IS_ERR(pd))) {
err = PTR_ERR(pd);
pr_err("Failed to alloc iser dev pd, err:%d\n", err);
goto fail_pd;
}
mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
if (unlikely(IS_ERR(mr))) {
err = PTR_ERR(mr);
pr_err("Failed to get dma mr, err: %d\n", err);
goto fail_mr;
}
cqe_num = min(isert_dev->device_attr.max_cqe, ISER_CQ_ENTRIES);
cqe_num = cqe_num / isert_dev->num_cqs;
#ifdef CONFIG_SCST_EXTRACHECKS
if (isert_dev->device_attr.max_cqe == 0)
pr_err("Zero max_cqe encountered: you may have a compilation problem\n");
#endif
for (i = 0; i < isert_dev->num_cqs; ++i) {
struct isert_cq *cq_desc = &isert_dev->cq_desc[i];
cq_desc->dev = isert_dev;
cq_desc->idx = i;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb, NULL);
#else
INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb);
#endif
snprintf(wq_name, sizeof(wq_name), "isert_cq_%p", cq_desc);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
cq_desc->cq_workqueue = create_singlethread_workqueue(wq_name);
#else
#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 36)
cq_desc->cq_workqueue = alloc_workqueue(wq_name,
WQ_CPU_INTENSIVE|
WQ_RESCUER, 1);
#else
cq_desc->cq_workqueue = alloc_workqueue(wq_name,
WQ_CPU_INTENSIVE|
WQ_MEM_RECLAIM, 1);
#endif
#endif
if (unlikely(!cq_desc->cq_workqueue)) {
pr_err("Failed to alloc iser cq work queue for dev:%s\n",
ib_dev->name);
err = -ENOMEM;
goto fail_cq;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
cq = ib_create_cq(ib_dev,
isert_cq_comp_handler,
isert_async_evt_handler,
cq_desc, /* context */
cqe_num,
i); /* completion vector */
#else
{
struct ib_cq_init_attr ia = {
.cqe = cqe_num,
.comp_vector = i,
};
cq = ib_create_cq(ib_dev,
isert_cq_comp_handler,
isert_async_evt_handler,
cq_desc, /* context */
&ia);
}
#endif
if (unlikely(IS_ERR(cq))) {
cq_desc->cq = NULL;
err = PTR_ERR(cq);
pr_err("Failed to create iser dev cq, err:%d\n", err);
goto fail_cq;
}
cq_desc->cq = cq;
err = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
if (unlikely(err)) {
pr_err("Failed to request notify cq, err: %d\n", err);
goto fail_cq;
}
}
isert_dev->ib_dev = ib_dev;
isert_dev->pd = pd;
isert_dev->mr = mr;
INIT_LIST_HEAD(&isert_dev->conn_list);
lockdep_assert_held(&dev_list_mutex);
isert_dev_list_add(isert_dev);
pr_info("iser created device:%p\n", isert_dev);
return isert_dev;
fail_cq:
for (j = 0; j <= i; ++j) {
if (isert_dev->cq_desc[j].cq)
ib_destroy_cq(isert_dev->cq_desc[j].cq);
if (isert_dev->cq_desc[j].cq_workqueue)
destroy_workqueue(isert_dev->cq_desc[j].cq_workqueue);
}
ib_dereg_mr(mr);
fail_mr:
ib_dealloc_pd(pd);
fail_pd:
vfree(isert_dev->cq_desc);
fail_alloc_cq_desc:
kfree(isert_dev->cq_qps);
fail_cq_qps:
fail_query:
kfree(isert_dev);
out:
TRACE_EXIT_RES(err);
return ERR_PTR(err);
}
static void isert_device_release(struct isert_device *isert_dev)
{
int err, i;
TRACE_ENTRY();
lockdep_assert_held(&dev_list_mutex);
isert_dev_list_remove(isert_dev); /* remove from global list */
for (i = 0; i < isert_dev->num_cqs; ++i) {
struct isert_cq *cq_desc = &isert_dev->cq_desc[i];
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
/*
* cancel_work_sync() was introduced in 2.6.22. We can
* only wait until all scheduled work is done.
*/
flush_workqueue(cq_desc->cq_workqueue);
#else
cancel_work_sync(&cq_desc->cq_comp_work);
#endif
err = ib_destroy_cq(cq_desc->cq);
if (unlikely(err))
pr_err("Failed to destroy cq, err:%d\n", err);
destroy_workqueue(cq_desc->cq_workqueue);
}
err = ib_dereg_mr(isert_dev->mr);
if (unlikely(err))
pr_err("Failed to destroy mr, err:%d\n", err);
err = ib_dealloc_pd(isert_dev->pd);
if (unlikely(err))
pr_err("Failed to destroy pd, err:%d\n", err);
vfree(isert_dev->cq_desc);
isert_dev->cq_desc = NULL;
kfree(isert_dev->cq_qps);
isert_dev->cq_qps = NULL;
kfree(isert_dev);
TRACE_EXIT();
}
static void isert_async_evt_handler(struct ib_event *async_ev, void *context)
{
struct isert_cq *cq = context;
struct isert_device *isert_dev = cq->dev;
struct ib_device *ib_dev = isert_dev->ib_dev;
char *dev_name = ib_dev->name;
enum ib_event_type ev_type = async_ev->event;
struct isert_connection *isert_conn;
TRACE_ENTRY();
switch (ev_type) {
case IB_EVENT_COMM_EST:
isert_conn = async_ev->element.qp->qp_context;
pr_info("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
isert_conn, isert_conn->cm_id, dev_name,
ib_event_type_str(IB_EVENT_COMM_EST));
/* force "connection established" event */
rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST);
break;
/* rest of QP-related events */
case IB_EVENT_QP_FATAL:
case IB_EVENT_QP_REQ_ERR:
case IB_EVENT_QP_ACCESS_ERR:
case IB_EVENT_SQ_DRAINED:
case IB_EVENT_PATH_MIG:
case IB_EVENT_PATH_MIG_ERR:
case IB_EVENT_QP_LAST_WQE_REACHED:
isert_conn = async_ev->element.qp->qp_context;
pr_err("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
isert_conn, isert_conn->cm_id, dev_name,
ib_event_type_str(ev_type));
break;
/* CQ-related events */
case IB_EVENT_CQ_ERR:
pr_err("dev:%s CQ evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
/* SRQ events */
case IB_EVENT_SRQ_ERR:
case IB_EVENT_SRQ_LIMIT_REACHED:
pr_err("dev:%s SRQ evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
/* Port events */
case IB_EVENT_PORT_ACTIVE:
case IB_EVENT_PORT_ERR:
case IB_EVENT_LID_CHANGE:
case IB_EVENT_PKEY_CHANGE:
case IB_EVENT_SM_CHANGE:
case IB_EVENT_CLIENT_REREGISTER:
pr_err("dev:%s port:%d evt: %s\n",
dev_name, async_ev->element.port_num,
ib_event_type_str(ev_type));
break;
/* HCA events */
case IB_EVENT_DEVICE_FATAL:
pr_err("dev:%s HCA evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
default:
pr_err("dev:%s evt: %s\n", dev_name,
ib_event_type_str(ev_type));
break;
}
TRACE_EXIT();
}
