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qcacld-3.0: Add transition timeout detection to DSC

Forráskód böngészése 
In order to catch and debug long running transitions, add a watchdog
timer to Driver Synchronization Core (DSC) transition start/stop call
pairs. If the timer expires, panic the driver for offline debugging.

Change-Id: I9b64fdb9cc20e1225394702d58b24db92a2d67e1
CRs-Fixed: 2328596
This commit is contained in:
Dustin Brown
2018-10-05 10:45:41 -07:00
committed by nshrivas
szülő 045f3025eb
commit 4f74e9522b
6 fájl változott, egészen pontosan 110 új sor hozzáadva és 26 régi sor törölve
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75
components/dsc/src/__wlan_dsc.c
Fájl megtekintése

@@ -171,6 +171,47 @@ bool __dsc_ops_remove(struct dsc_ops *ops, const char *func)
}
#ifdef WLAN_DSC_DEBUG
static void __dsc_dbg_trans_timeout(void *opaque_trans)
{
struct dsc_trans *trans = opaque_trans;
QDF_DEBUG_PANIC("Transition '%s' exceeded %ums",
trans->active_desc, DSC_TRANS_TIMEOUT_MS);
}
/**
* __dsc_dbg_trans_timeout_start() - start a timeout timer for @trans
* @trans: the active transition to start a timeout timer for
*
* Return: QDF_STATUS
*/
static QDF_STATUS __dsc_dbg_trans_timeout_start(struct dsc_trans *trans)
{
QDF_STATUS status;
status = qdf_timer_init(NULL, &trans->timeout_timer,
__dsc_dbg_trans_timeout, trans,
QDF_TIMER_TYPE_SW);
if (QDF_IS_STATUS_ERROR(status))
return status;
qdf_timer_start(&trans->timeout_timer, DSC_TRANS_TIMEOUT_MS);
return QDF_STATUS_SUCCESS;
}
/**
* __dsc_dbg_trans_timeout_stop() - stop the timeout timer for @trans
* @trans: the active transition to stop the timeout timer for
*
* Return: None
*/
static void __dsc_dbg_trans_timeout_stop(struct dsc_trans *trans)
{
qdf_timer_stop(&trans->timeout_timer);
qdf_timer_free(&trans->timeout_timer);
}
static void __dsc_dbg_tran_wait_timeout(void *opaque_tran)
{
struct dsc_tran *tran = opaque_tran;
@@ -181,7 +222,7 @@ static void __dsc_dbg_tran_wait_timeout(void *opaque_tran)
/**
* __dsc_dbg_tran_wait_timeout_start() - start a timeout timer for @tran
* @tran: the transition to start a timeout timer for
* @tran: the pending transition to start a timeout timer for
*
* Return: QDF_STATUS
*/
@@ -202,7 +243,7 @@ static QDF_STATUS __dsc_dbg_tran_wait_timeout_start(struct dsc_tran *tran)
/**
* __dsc_dbg_tran_wait_timeout_stop() - stop the timeout timer for @tran
* @tran: the transition to stop the timeout timer for
* @tran: the pending transition to stop the timeout timer for
*
* Return: None
*/
@@ -212,6 +253,13 @@ static void __dsc_dbg_tran_wait_timeout_stop(struct dsc_tran *tran)
qdf_timer_free(&tran->timeout_timer);
}
#else
static inline QDF_STATUS __dsc_dbg_trans_timeout_start(struct dsc_trans *trans)
{
return QDF_STATUS_SUCCESS;
}
static inline void __dsc_dbg_trans_timeout_stop(struct dsc_trans *trans) { }
static inline QDF_STATUS
__dsc_dbg_tran_wait_timeout_start(struct dsc_tran *tran)
{
@@ -233,6 +281,27 @@ void __dsc_trans_deinit(struct dsc_trans *trans)
trans->active_desc = NULL;
}
QDF_STATUS __dsc_trans_start(struct dsc_trans *trans, const char *desc)
{
QDF_STATUS status;
status = __dsc_dbg_trans_timeout_start(trans);
if (QDF_IS_STATUS_ERROR(status))
return status;
dsc_assert(!trans->active_desc);
trans->active_desc = desc;
return QDF_STATUS_SUCCESS;
}
void __dsc_trans_stop(struct dsc_trans *trans)
{
dsc_assert(trans->active_desc);
trans->active_desc = NULL;
__dsc_dbg_trans_timeout_stop(trans);
}
QDF_STATUS __dsc_trans_queue(struct dsc_trans *trans, struct dsc_tran *tran,
const char *desc)
{
@@ -300,7 +369,7 @@ bool __dsc_trans_trigger(struct dsc_trans *trans)
if (!tran)
return false;
trans->active_desc = tran->desc;
__dsc_trans_start(trans, tran->desc);
qdf_event_set(&tran->event);
return true;