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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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scsi: qedi: Add MFW error recovery process
This patch adds the mfw error recovery process in the qedi driver. The process includes a partial/customized driver unload and load to reset context by preserving active iSCSI session kernel state. Link: https://lore.kernel.org/r/20200319083811.19499-2-mrangankar@marvell.com Signed-off-by: Manish Rangankar <mrangankar@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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fb276f7701
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4b1068f5d7
drivers/scsi/qedi
@ -331,6 +331,7 @@ struct qedi_ctx {
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u16 ll2_mtu;
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struct workqueue_struct *dpc_wq;
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struct delayed_work recovery_work;
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spinlock_t task_idx_lock; /* To protect gbl context */
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s32 last_tidx_alloc;
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@ -58,6 +58,7 @@ static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
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static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
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static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
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static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
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static void qedi_recovery_handler(struct work_struct *work);
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static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
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{
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@ -1113,6 +1114,20 @@ static void qedi_get_protocol_tlv_data(void *dev, void *data)
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return;
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}
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static void qedi_schedule_recovery_handler(void *dev)
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{
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struct qedi_ctx *qedi = dev;
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QEDI_ERR(&qedi->dbg_ctx, "Recovery handler scheduled.\n");
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if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags))
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return;
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atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
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schedule_delayed_work(&qedi->recovery_work, 0);
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}
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static void qedi_link_update(void *dev, struct qed_link_output *link)
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{
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struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
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@ -1130,6 +1145,7 @@ static void qedi_link_update(void *dev, struct qed_link_output *link)
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static struct qed_iscsi_cb_ops qedi_cb_ops = {
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{
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.link_update = qedi_link_update,
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.schedule_recovery_handler = qedi_schedule_recovery_handler,
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.get_protocol_tlv_data = qedi_get_protocol_tlv_data,
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.get_generic_tlv_data = qedi_get_generic_tlv_data,
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}
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@ -2328,16 +2344,18 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
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struct qedi_ctx *qedi = pci_get_drvdata(pdev);
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int rval;
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if (qedi->tmf_thread) {
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flush_workqueue(qedi->tmf_thread);
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destroy_workqueue(qedi->tmf_thread);
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qedi->tmf_thread = NULL;
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}
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if (mode == QEDI_MODE_NORMAL) {
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if (qedi->tmf_thread) {
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flush_workqueue(qedi->tmf_thread);
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destroy_workqueue(qedi->tmf_thread);
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qedi->tmf_thread = NULL;
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}
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if (qedi->offload_thread) {
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flush_workqueue(qedi->offload_thread);
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destroy_workqueue(qedi->offload_thread);
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qedi->offload_thread = NULL;
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if (qedi->offload_thread) {
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flush_workqueue(qedi->offload_thread);
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destroy_workqueue(qedi->offload_thread);
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qedi->offload_thread = NULL;
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}
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}
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#ifdef CONFIG_DEBUG_FS
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@ -2353,8 +2371,7 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
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qedi_ops->ll2->stop(qedi->cdev);
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}
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if (mode == QEDI_MODE_NORMAL)
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qedi_free_iscsi_pf_param(qedi);
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qedi_free_iscsi_pf_param(qedi);
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rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
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if (rval)
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@ -2373,9 +2390,6 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
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qedi_free_uio(qedi->udev);
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qedi_free_itt(qedi);
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iscsi_host_remove(qedi->shost);
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iscsi_host_free(qedi->shost);
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if (qedi->ll2_recv_thread) {
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kthread_stop(qedi->ll2_recv_thread);
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qedi->ll2_recv_thread = NULL;
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@ -2384,6 +2398,9 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
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if (qedi->boot_kset)
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iscsi_boot_destroy_kset(qedi->boot_kset);
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iscsi_host_remove(qedi->shost);
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iscsi_host_free(qedi->shost);
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}
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}
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@ -2435,14 +2452,12 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
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qedi->dev_info.common.num_hwfns,
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qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
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if (mode != QEDI_MODE_RECOVERY) {
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rc = qedi_set_iscsi_pf_param(qedi);
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if (rc) {
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rc = -ENOMEM;
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QEDI_ERR(&qedi->dbg_ctx,
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"Set iSCSI pf param fail\n");
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goto free_host;
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}
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rc = qedi_set_iscsi_pf_param(qedi);
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if (rc) {
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rc = -ENOMEM;
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QEDI_ERR(&qedi->dbg_ctx,
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"Set iSCSI pf param fail\n");
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goto free_host;
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}
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qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
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@ -2633,6 +2648,8 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
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goto free_cid_que;
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}
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INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler);
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/* F/w needs 1st task context memory entry for performance */
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set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
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atomic_set(&qedi->num_offloads, 0);
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@ -2673,6 +2690,32 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
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return rc;
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}
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static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session)
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{
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struct iscsi_session *session = cls_session->dd_data;
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struct iscsi_conn *conn = session->leadconn;
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struct qedi_conn *qedi_conn = conn->dd_data;
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iscsi_conn_failure(qedi_conn->cls_conn->dd_data, ISCSI_ERR_CONN_FAILED);
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}
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static void qedi_recovery_handler(struct work_struct *work)
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{
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struct qedi_ctx *qedi =
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container_of(work, struct qedi_ctx, recovery_work.work);
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iscsi_host_for_each_session(qedi->shost, qedi_mark_conn_recovery);
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/* Call common_ops->recovery_prolog to allow the MFW to quiesce
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* any PCI transactions.
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*/
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qedi_ops->common->recovery_prolog(qedi->cdev);
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__qedi_remove(qedi->pdev, QEDI_MODE_RECOVERY);
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__qedi_probe(qedi->pdev, QEDI_MODE_RECOVERY);
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clear_bit(QEDI_IN_RECOVERY, &qedi->flags);
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}
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static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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return __qedi_probe(pdev, QEDI_MODE_NORMAL);
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