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scsi: qedi: Add MFW error recovery process

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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>
This commit is contained in:
Manish Rangankar 2020-03-19 01:38:10 -07:00 committed by Martin K. Petersen
parent fb276f7701
commit 4b1068f5d7
2 changed files with 66 additions and 22 deletions
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1
drivers/scsi/qedi/qedi.h
View File

@ -331,6 +331,7 @@ struct qedi_ctx {
u16 ll2_mtu;
struct workqueue_struct *dpc_wq;
struct delayed_work recovery_work;
spinlock_t task_idx_lock; /* To protect gbl context */
s32 last_tidx_alloc;

87
drivers/scsi/qedi/qedi_main.c
View File

@ -58,6 +58,7 @@ static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
static void qedi_recovery_handler(struct work_struct *work);
static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
{
@ -1113,6 +1114,20 @@ static void qedi_get_protocol_tlv_data(void *dev, void *data)
return;
}
static void qedi_schedule_recovery_handler(void *dev)
{
struct qedi_ctx *qedi = dev;
QEDI_ERR(&qedi->dbg_ctx, "Recovery handler scheduled.\n");
if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags))
return;
atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
schedule_delayed_work(&qedi->recovery_work, 0);
}
static void qedi_link_update(void *dev, struct qed_link_output *link)
{
struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
@ -1130,6 +1145,7 @@ static void qedi_link_update(void *dev, struct qed_link_output *link)
static struct qed_iscsi_cb_ops qedi_cb_ops = {
{
.link_update = qedi_link_update,
.schedule_recovery_handler = qedi_schedule_recovery_handler,
.get_protocol_tlv_data = qedi_get_protocol_tlv_data,
.get_generic_tlv_data = qedi_get_generic_tlv_data,
}
@ -2328,16 +2344,18 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
struct qedi_ctx *qedi = pci_get_drvdata(pdev);
int rval;
if (qedi->tmf_thread) {
flush_workqueue(qedi->tmf_thread);
destroy_workqueue(qedi->tmf_thread);
qedi->tmf_thread = NULL;
}
if (mode == QEDI_MODE_NORMAL) {
if (qedi->tmf_thread) {
flush_workqueue(qedi->tmf_thread);
destroy_workqueue(qedi->tmf_thread);
qedi->tmf_thread = NULL;
}
if (qedi->offload_thread) {
flush_workqueue(qedi->offload_thread);
destroy_workqueue(qedi->offload_thread);
qedi->offload_thread = NULL;
if (qedi->offload_thread) {
flush_workqueue(qedi->offload_thread);
destroy_workqueue(qedi->offload_thread);
qedi->offload_thread = NULL;
}
}
#ifdef CONFIG_DEBUG_FS
@ -2353,8 +2371,7 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
qedi_ops->ll2->stop(qedi->cdev);
}
if (mode == QEDI_MODE_NORMAL)
qedi_free_iscsi_pf_param(qedi);
qedi_free_iscsi_pf_param(qedi);
rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
if (rval)
@ -2373,9 +2390,6 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
qedi_free_uio(qedi->udev);
qedi_free_itt(qedi);
iscsi_host_remove(qedi->shost);
iscsi_host_free(qedi->shost);
if (qedi->ll2_recv_thread) {
kthread_stop(qedi->ll2_recv_thread);
qedi->ll2_recv_thread = NULL;
@ -2384,6 +2398,9 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
if (qedi->boot_kset)
iscsi_boot_destroy_kset(qedi->boot_kset);
iscsi_host_remove(qedi->shost);
iscsi_host_free(qedi->shost);
}
}
@ -2435,14 +2452,12 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
qedi->dev_info.common.num_hwfns,
qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
if (mode != QEDI_MODE_RECOVERY) {
rc = qedi_set_iscsi_pf_param(qedi);
if (rc) {
rc = -ENOMEM;
QEDI_ERR(&qedi->dbg_ctx,
"Set iSCSI pf param fail\n");
goto free_host;
}
rc = qedi_set_iscsi_pf_param(qedi);
if (rc) {
rc = -ENOMEM;
QEDI_ERR(&qedi->dbg_ctx,
"Set iSCSI pf param fail\n");
goto free_host;
}
qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
@ -2633,6 +2648,8 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
goto free_cid_que;
}
INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler);
/* F/w needs 1st task context memory entry for performance */
set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
atomic_set(&qedi->num_offloads, 0);
@ -2673,6 +2690,32 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
return rc;
}
static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn = session->leadconn;
struct qedi_conn *qedi_conn = conn->dd_data;
iscsi_conn_failure(qedi_conn->cls_conn->dd_data, ISCSI_ERR_CONN_FAILED);
}
static void qedi_recovery_handler(struct work_struct *work)
{
struct qedi_ctx *qedi =
container_of(work, struct qedi_ctx, recovery_work.work);
iscsi_host_for_each_session(qedi->shost, qedi_mark_conn_recovery);
/* Call common_ops->recovery_prolog to allow the MFW to quiesce
* any PCI transactions.
*/
qedi_ops->common->recovery_prolog(qedi->cdev);
__qedi_remove(qedi->pdev, QEDI_MODE_RECOVERY);
__qedi_probe(qedi->pdev, QEDI_MODE_RECOVERY);
clear_bit(QEDI_IN_RECOVERY, &qedi->flags);
}
static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
return __qedi_probe(pdev, QEDI_MODE_NORMAL);