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Commit da05bf29 authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

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: default avatarUrsula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a81e4aff

net/smc/smc_ib.c

+25 −13
Original line number Diff line number Diff line
@@ -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);
@@ -186,6 +191,7 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler, 


void smc_ib_dealloc_protection_domain(struct smc_link *lnk)

{

	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;
@@ -219,6 +229,7 @@ static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv) 


void smc_ib_destroy_queue_pair(struct smc_link *lnk)

{

	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);