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iavf: Refactor the watchdog state machine 

Refactor the watchdog state machine implementation.
Add the additional state __IAVF_COMM_FAILED to process
the PF communication fails. Prepare the watchdog state machine
to integrate with init state machine.

Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Jakub Pawlak <jakub.pawlak@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jan Sokolowski 2019-05-14 10:37:06 -07:00 committed by Jeff Kirsher
parent fdd4044ffd
commit bac8486116
2 changed files with 44 additions and 30 deletions
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1
drivers/net/ethernet/intel/iavf/iavf.h
View File

@ -171,6 +171,7 @@ enum iavf_state_t {
__IAVF_INIT_GET_RESOURCES, /* aq msg sent, awaiting reply */
__IAVF_INIT_SW, /* got resources, setting up structs */
__IAVF_RESETTING, /* in reset */
__IAVF_COMM_FAILED, /* communication with PF failed */
/* Below here, watchdog is running */
__IAVF_DOWN, /* ready, can be opened */
__IAVF_DOWN_PENDING, /* descending, waiting for watchdog */

73
drivers/net/ethernet/intel/iavf/iavf_main.c
View File

@ -1674,13 +1674,18 @@ static void iavf_watchdog_task(struct work_struct *work)
if (test_and_set_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section))
goto restart_watchdog;
if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) {
if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
adapter->state = __IAVF_COMM_FAILED;
switch (adapter->state) {
case __IAVF_COMM_FAILED:
reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
if (reg_val == VIRTCHNL_VFR_VFACTIVE ||
reg_val == VIRTCHNL_VFR_COMPLETED) {
/* A chance for redemption! */
dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attemptingreinit.\n");
dev_err(&adapter->pdev->dev,
"Hardware came out of reset. Attempting reinit.\n");
adapter->state = __IAVF_STARTUP;
adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
queue_delayed_work(iavf_wq, &adapter->init_task, 10);
@ -1695,50 +1700,58 @@ static void iavf_watchdog_task(struct work_struct *work)
}
adapter->aq_required = 0;
adapter->current_op = VIRTCHNL_OP_UNKNOWN;
clear_bit(__IAVF_IN_CRITICAL_TASK,
&adapter->crit_section);
queue_delayed_work(iavf_wq,
&adapter->watchdog_task,
msecs_to_jiffies(10));
goto watchdog_done;
case __IAVF_RESETTING:
clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
queue_delayed_work(iavf_wq, &adapter->watchdog_task, HZ * 2);
return;
case __IAVF_DOWN:
case __IAVF_DOWN_PENDING:
case __IAVF_TESTING:
case __IAVF_RUNNING:
if (adapter->current_op) {
if (!iavf_asq_done(hw)) {
dev_dbg(&adapter->pdev->dev,
"Admin queue timeout\n");
iavf_send_api_ver(adapter);
}
} else {
if (!iavf_process_aq_command(adapter) &&
adapter->state == __IAVF_RUNNING)
iavf_request_stats(adapter);
}
break;
case __IAVF_REMOVE:
clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
return;
default:
goto restart_watchdog;
}
if (adapter->state < __IAVF_DOWN ||
(adapter->flags & IAVF_FLAG_RESET_PENDING))
goto watchdog_done;
/* check for reset */
/* check for hw reset */
reg_val = rd32(hw, IAVF_VF_ARQLEN1) & IAVF_VF_ARQLEN1_ARQENABLE_MASK;
if (!(adapter->flags & IAVF_FLAG_RESET_PENDING) && !reg_val) {
if (!reg_val) {
adapter->state = __IAVF_RESETTING;
adapter->flags |= IAVF_FLAG_RESET_PENDING;
dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
queue_work(iavf_wq, &adapter->reset_task);
adapter->aq_required = 0;
adapter->current_op = VIRTCHNL_OP_UNKNOWN;
dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
queue_work(iavf_wq, &adapter->reset_task);
goto watchdog_done;
}
/* Process admin queue tasks. After init, everything gets done
* here so we don't race on the admin queue.
* The check is made against -EAGAIN, as it's the error code that
* would be returned on no op to run. Failures of called functions
* return other values.
*/
if (adapter->current_op) {
if (!iavf_asq_done(hw)) {
dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
iavf_send_api_ver(adapter);
}
} else if (iavf_process_aq_command(adapter) == -EAGAIN &&
adapter->state == __IAVF_RUNNING) {
iavf_request_stats(adapter);
}
schedule_delayed_work(&adapter->client_task, msecs_to_jiffies(5));
watchdog_done:
if (adapter->state == __IAVF_RUNNING)
if (adapter->state == __IAVF_RUNNING ||
adapter->state == __IAVF_COMM_FAILED)
iavf_detect_recover_hung(&adapter->vsi);
clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
restart_watchdog:
if (adapter->state == __IAVF_REMOVE)
return;
if (adapter->aq_required)
queue_delayed_work(iavf_wq, &adapter->watchdog_task,
msecs_to_jiffies(20));