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net/smc: handle device, port, and QP error events 

RoCE device changes cause an IB event, processed in the global event
handler for the ROCE device. Problems for a certain Queue Pair cause a QP
event, processed in the QP event handler for this QP.
Among those events are port errors and other fatal device errors. All
link groups using such a port or device must be terminated in those cases.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2018-01-26 09:28:46 +01:00 committed by David S. Miller
parent a81e4affe1
commit da05bf2981
1 changed files with 25 additions and 13 deletions
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38
net/smc/smc_ib.c
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@ -141,6 +141,17 @@ int smc_ib_ready_link(struct smc_link *lnk)
return rc;
}
static void smc_ib_port_terminate(struct smc_ib_device *smcibdev, u8 ibport)
{
struct smc_link_group *lgr, *l;
list_for_each_entry_safe(lgr, l, &smc_lgr_list.list, list) {
if (lgr->lnk[SMC_SINGLE_LINK].smcibdev == smcibdev &&
lgr->lnk[SMC_SINGLE_LINK].ibport == ibport)
smc_lgr_terminate(lgr);
}
}
/* process context wrapper for might_sleep smc_ib_remember_port_attr */
static void smc_ib_port_event_work(struct work_struct *work)
{
@ -151,6 +162,8 @@ static void smc_ib_port_event_work(struct work_struct *work)
for_each_set_bit(port_idx, &smcibdev->port_event_mask, SMC_MAX_PORTS) {
smc_ib_remember_port_attr(smcibdev, port_idx + 1);
clear_bit(port_idx, &smcibdev->port_event_mask);
if (!smc_ib_port_active(smcibdev, port_idx + 1))
smc_ib_port_terminate(smcibdev, port_idx + 1);
}
}
@ -165,15 +178,7 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
switch (ibevent->event) {
case IB_EVENT_PORT_ERR:
port_idx = ibevent->element.port_num - 1;
set_bit(port_idx, &smcibdev->port_event_mask);
schedule_work(&smcibdev->port_event_work);
/* fall through */
case IB_EVENT_DEVICE_FATAL:
/* tbd in follow-on patch:
* abnormal close of corresponding connections
*/
break;
case IB_EVENT_PORT_ACTIVE:
port_idx = ibevent->element.port_num - 1;
set_bit(port_idx, &smcibdev->port_event_mask);
@ -186,7 +191,8 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
void smc_ib_dealloc_protection_domain(struct smc_link *lnk)
{
ib_dealloc_pd(lnk->roce_pd);
if (lnk->roce_pd)
ib_dealloc_pd(lnk->roce_pd);
lnk->roce_pd = NULL;
}
@ -203,14 +209,18 @@ int smc_ib_create_protection_domain(struct smc_link *lnk)
static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv)
{
struct smc_ib_device *smcibdev =
(struct smc_ib_device *)ibevent->device;
u8 port_idx;
switch (ibevent->event) {
case IB_EVENT_DEVICE_FATAL:
case IB_EVENT_GID_CHANGE:
case IB_EVENT_PORT_ERR:
case IB_EVENT_QP_ACCESS_ERR:
/* tbd in follow-on patch:
* abnormal close of corresponding connections
*/
port_idx = ibevent->element.port_num - 1;
set_bit(port_idx, &smcibdev->port_event_mask);
schedule_work(&smcibdev->port_event_work);
break;
default:
break;
@ -219,7 +229,8 @@ static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv)
void smc_ib_destroy_queue_pair(struct smc_link *lnk)
{
ib_destroy_qp(lnk->roce_qp);
if (lnk->roce_qp)
ib_destroy_qp(lnk->roce_qp);
lnk->roce_qp = NULL;
}
@ -462,6 +473,7 @@ static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev)
{
if (!smcibdev->initialized)
return;
smcibdev->initialized = 0;
smc_wr_remove_dev(smcibdev);
ib_unregister_event_handler(&smcibdev->event_handler);
ib_destroy_cq(smcibdev->roce_cq_recv);