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>
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@ -141,6 +141,17 @@ out:
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return rc;
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}
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static void smc_ib_port_terminate(struct smc_ib_device *smcibdev, u8 ibport)
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{
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struct smc_link_group *lgr, *l;
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list_for_each_entry_safe(lgr, l, &smc_lgr_list.list, list) {
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if (lgr->lnk[SMC_SINGLE_LINK].smcibdev == smcibdev &&
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lgr->lnk[SMC_SINGLE_LINK].ibport == ibport)
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smc_lgr_terminate(lgr);
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}
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}
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/* process context wrapper for might_sleep smc_ib_remember_port_attr */
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static void smc_ib_port_event_work(struct work_struct *work)
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{
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@ -151,6 +162,8 @@ static void smc_ib_port_event_work(struct work_struct *work)
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for_each_set_bit(port_idx, &smcibdev->port_event_mask, SMC_MAX_PORTS) {
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smc_ib_remember_port_attr(smcibdev, port_idx + 1);
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clear_bit(port_idx, &smcibdev->port_event_mask);
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if (!smc_ib_port_active(smcibdev, port_idx + 1))
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smc_ib_port_terminate(smcibdev, port_idx + 1);
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}
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}
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@ -165,15 +178,7 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
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switch (ibevent->event) {
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case IB_EVENT_PORT_ERR:
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port_idx = ibevent->element.port_num - 1;
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set_bit(port_idx, &smcibdev->port_event_mask);
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schedule_work(&smcibdev->port_event_work);
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/* fall through */
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case IB_EVENT_DEVICE_FATAL:
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/* tbd in follow-on patch:
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* abnormal close of corresponding connections
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*/
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break;
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case IB_EVENT_PORT_ACTIVE:
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port_idx = ibevent->element.port_num - 1;
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set_bit(port_idx, &smcibdev->port_event_mask);
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@ -186,7 +191,8 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
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void smc_ib_dealloc_protection_domain(struct smc_link *lnk)
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{
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ib_dealloc_pd(lnk->roce_pd);
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if (lnk->roce_pd)
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ib_dealloc_pd(lnk->roce_pd);
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lnk->roce_pd = NULL;
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}
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@ -203,14 +209,18 @@ int smc_ib_create_protection_domain(struct smc_link *lnk)
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static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv)
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{
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struct smc_ib_device *smcibdev =
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(struct smc_ib_device *)ibevent->device;
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u8 port_idx;
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switch (ibevent->event) {
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case IB_EVENT_DEVICE_FATAL:
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case IB_EVENT_GID_CHANGE:
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case IB_EVENT_PORT_ERR:
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case IB_EVENT_QP_ACCESS_ERR:
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/* tbd in follow-on patch:
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* abnormal close of corresponding connections
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*/
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port_idx = ibevent->element.port_num - 1;
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set_bit(port_idx, &smcibdev->port_event_mask);
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schedule_work(&smcibdev->port_event_work);
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break;
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default:
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break;
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@ -219,7 +229,8 @@ static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv)
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void smc_ib_destroy_queue_pair(struct smc_link *lnk)
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{
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ib_destroy_qp(lnk->roce_qp);
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if (lnk->roce_qp)
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ib_destroy_qp(lnk->roce_qp);
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lnk->roce_qp = NULL;
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}
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@ -462,6 +473,7 @@ static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev)
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{
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if (!smcibdev->initialized)
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return;
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smcibdev->initialized = 0;
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smc_wr_remove_dev(smcibdev);
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ib_unregister_event_handler(&smcibdev->event_handler);
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ib_destroy_cq(smcibdev->roce_cq_recv);
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