diff options
Diffstat (limited to 'drivers/staging/epl/TimerHighReskX86.c')
| -rw-r--r-- | drivers/staging/epl/TimerHighReskX86.c | 522 |
1 files changed, 248 insertions, 274 deletions
diff --git a/drivers/staging/epl/TimerHighReskX86.c b/drivers/staging/epl/TimerHighReskX86.c index 70ba2d62344..e1cb8238596 100644 --- a/drivers/staging/epl/TimerHighReskX86.c +++ b/drivers/staging/epl/TimerHighReskX86.c @@ -91,27 +91,25 @@ // const defines //--------------------------------------------------------------------------- -#define TIMER_COUNT 2 /* max 15 timers selectable */ -#define TIMER_MIN_VAL_SINGLE 5000 /* min 5us */ -#define TIMER_MIN_VAL_CYCLE 100000 /* min 100us */ +#define TIMER_COUNT 2 /* max 15 timers selectable */ +#define TIMER_MIN_VAL_SINGLE 5000 /* min 5us */ +#define TIMER_MIN_VAL_CYCLE 100000 /* min 100us */ #define PROVE_OVERRUN - #ifndef CONFIG_HIGH_RES_TIMERS - #error "Kernel symbol CONFIG_HIGH_RES_TIMERS is required." +#error "Kernel symbol CONFIG_HIGH_RES_TIMERS is required." #endif - // TracePoint support for realtime-debugging #ifdef _DBG_TRACE_POINTS_ - void PUBLIC TgtDbgSignalTracePoint (BYTE bTracePointNumber_p); - void PUBLIC TgtDbgPostTraceValue (DWORD dwTraceValue_p); - #define TGT_DBG_SIGNAL_TRACE_POINT(p) TgtDbgSignalTracePoint(p) - #define TGT_DBG_POST_TRACE_VALUE(v) TgtDbgPostTraceValue(v) +void PUBLIC TgtDbgSignalTracePoint(BYTE bTracePointNumber_p); +void PUBLIC TgtDbgPostTraceValue(DWORD dwTraceValue_p); +#define TGT_DBG_SIGNAL_TRACE_POINT(p) TgtDbgSignalTracePoint(p) +#define TGT_DBG_POST_TRACE_VALUE(v) TgtDbgPostTraceValue(v) #else - #define TGT_DBG_SIGNAL_TRACE_POINT(p) - #define TGT_DBG_POST_TRACE_VALUE(v) +#define TGT_DBG_SIGNAL_TRACE_POINT(p) +#define TGT_DBG_POST_TRACE_VALUE(v) #endif #define HRT_DBG_POST_TRACE_VALUE(Event_p, uiNodeId_p, wErrorCode_p) \ TGT_DBG_POST_TRACE_VALUE((0xE << 28) | (Event_p << 24) \ @@ -128,19 +126,17 @@ // modul global types //--------------------------------------------------------------------------- -typedef struct -{ - tEplTimerEventArg m_EventArg; - tEplTimerkCallback m_pfnCallback; - struct hrtimer m_Timer; - BOOL m_fContinuously; - unsigned long long m_ullPeriod; +typedef struct { + tEplTimerEventArg m_EventArg; + tEplTimerkCallback m_pfnCallback; + struct hrtimer m_Timer; + BOOL m_fContinuously; + unsigned long long m_ullPeriod; } tEplTimerHighReskTimerInfo; -typedef struct -{ - tEplTimerHighReskTimerInfo m_aTimerInfo[TIMER_COUNT]; +typedef struct { + tEplTimerHighReskTimerInfo m_aTimerInfo[TIMER_COUNT]; } tEplTimerHighReskInstance; @@ -148,13 +144,13 @@ typedef struct // local vars //--------------------------------------------------------------------------- -static tEplTimerHighReskInstance EplTimerHighReskInstance_l; +static tEplTimerHighReskInstance EplTimerHighReskInstance_l; //--------------------------------------------------------------------------- // local function prototypes //--------------------------------------------------------------------------- -enum hrtimer_restart EplTimerHighReskCallback (struct hrtimer* pTimer_p); +enum hrtimer_restart EplTimerHighReskCallback(struct hrtimer *pTimer_p); //=========================================================================// // // @@ -162,7 +158,6 @@ enum hrtimer_restart EplTimerHighReskCallback (struct hrtimer* pTimer_p); // // //=========================================================================// - //--------------------------------------------------------------------------- // // Function: EplTimerHighReskInit() @@ -179,15 +174,14 @@ enum hrtimer_restart EplTimerHighReskCallback (struct hrtimer* pTimer_p); tEplKernel PUBLIC EplTimerHighReskInit(void) { -tEplKernel Ret; + tEplKernel Ret; - Ret = EplTimerHighReskAddInstance(); + Ret = EplTimerHighReskAddInstance(); - return Ret; + return Ret; } - //--------------------------------------------------------------------------- // // Function: EplTimerHighReskAddInstance() @@ -204,44 +198,44 @@ tEplKernel Ret; tEplKernel PUBLIC EplTimerHighReskAddInstance(void) { -tEplKernel Ret; -unsigned int uiIndex; + tEplKernel Ret; + unsigned int uiIndex; - Ret = kEplSuccessful; + Ret = kEplSuccessful; - EPL_MEMSET(&EplTimerHighReskInstance_l, 0, sizeof (EplTimerHighReskInstance_l)); + EPL_MEMSET(&EplTimerHighReskInstance_l, 0, + sizeof(EplTimerHighReskInstance_l)); #ifndef CONFIG_HIGH_RES_TIMERS - printk("EplTimerHighResk: Kernel symbol CONFIG_HIGH_RES_TIMERS is required.\n"); - Ret = kEplNoResource; - return Ret; + printk + ("EplTimerHighResk: Kernel symbol CONFIG_HIGH_RES_TIMERS is required.\n"); + Ret = kEplNoResource; + return Ret; #endif - /* - * Initialize hrtimer structures for all usable timers. - */ - for (uiIndex = 0; uiIndex < TIMER_COUNT; uiIndex++) - { - tEplTimerHighReskTimerInfo* pTimerInfo; - struct hrtimer* pTimer; - - pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; - pTimer = &pTimerInfo->m_Timer; - hrtimer_init(pTimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); - - pTimer->function = EplTimerHighReskCallback; - - /* - * We use HRTIMER_CB_SOFTIRQ here. - * HRTIMER_CB_IRQSAFE is critical as the callback function - * would be called with IRQs disabled. - */ - pTimer->cb_mode = HRTIMER_CB_SOFTIRQ; - } - - return Ret; -} + /* + * Initialize hrtimer structures for all usable timers. + */ + for (uiIndex = 0; uiIndex < TIMER_COUNT; uiIndex++) { + tEplTimerHighReskTimerInfo *pTimerInfo; + struct hrtimer *pTimer; + + pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; + pTimer = &pTimerInfo->m_Timer; + hrtimer_init(pTimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + + pTimer->function = EplTimerHighReskCallback; + /* + * We use HRTIMER_CB_SOFTIRQ here. + * HRTIMER_CB_IRQSAFE is critical as the callback function + * would be called with IRQs disabled. + */ + pTimer->cb_mode = HRTIMER_CB_SOFTIRQ; + } + + return Ret; +} //--------------------------------------------------------------------------- // @@ -259,30 +253,28 @@ unsigned int uiIndex; tEplKernel PUBLIC EplTimerHighReskDelInstance(void) { -tEplTimerHighReskTimerInfo* pTimerInfo; -tEplKernel Ret; -unsigned int uiIndex; - - Ret = kEplSuccessful; - - for (uiIndex = 0; uiIndex < TIMER_COUNT; uiIndex++) - { - pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[0]; - pTimerInfo->m_pfnCallback = NULL; - pTimerInfo->m_EventArg.m_TimerHdl = 0; - /* - * In this case we can not just try to cancel the timer. - * We actually have to wait until its callback function - * has returned. - */ - hrtimer_cancel(&pTimerInfo->m_Timer); - } - - return Ret; + tEplTimerHighReskTimerInfo *pTimerInfo; + tEplKernel Ret; + unsigned int uiIndex; + + Ret = kEplSuccessful; + + for (uiIndex = 0; uiIndex < TIMER_COUNT; uiIndex++) { + pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[0]; + pTimerInfo->m_pfnCallback = NULL; + pTimerInfo->m_EventArg.m_TimerHdl = 0; + /* + * In this case we can not just try to cancel the timer. + * We actually have to wait until its callback function + * has returned. + */ + hrtimer_cancel(&pTimerInfo->m_Timer); + } + + return Ret; } - //--------------------------------------------------------------------------- // // Function: EplTimerHighReskModifyTimerNs() @@ -313,96 +305,89 @@ unsigned int uiIndex; // //--------------------------------------------------------------------------- -tEplKernel PUBLIC EplTimerHighReskModifyTimerNs(tEplTimerHdl* pTimerHdl_p, - unsigned long long ullTimeNs_p, - tEplTimerkCallback pfnCallback_p, - unsigned long ulArgument_p, - BOOL fContinuously_p) +tEplKernel PUBLIC EplTimerHighReskModifyTimerNs(tEplTimerHdl * pTimerHdl_p, + unsigned long long ullTimeNs_p, + tEplTimerkCallback + pfnCallback_p, + unsigned long ulArgument_p, + BOOL fContinuously_p) { -tEplKernel Ret; -unsigned int uiIndex; -tEplTimerHighReskTimerInfo* pTimerInfo; -ktime_t RelTime; - - Ret = kEplSuccessful; - - // check pointer to handle - if(pTimerHdl_p == NULL) - { - Ret = kEplTimerInvalidHandle; - goto Exit; - } - - if (*pTimerHdl_p == 0) - { // no timer created yet - - // search free timer info structure - pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[0]; - for (uiIndex = 0; uiIndex < TIMER_COUNT; uiIndex++, pTimerInfo++) - { - if (pTimerInfo->m_EventArg.m_TimerHdl == 0) - { // free structure found - break; - } - } - if (uiIndex >= TIMER_COUNT) - { // no free structure found - Ret = kEplTimerNoTimerCreated; - goto Exit; - } - - pTimerInfo->m_EventArg.m_TimerHdl = HDL_INIT(uiIndex); - } - else - { - uiIndex = HDL_TO_IDX(*pTimerHdl_p); - if (uiIndex >= TIMER_COUNT) - { // invalid handle - Ret = kEplTimerInvalidHandle; - goto Exit; - } - - pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; - } - - /* - * increment timer handle - * (if timer expires right after this statement, the user - * would detect an unknown timer handle and discard it) - */ - pTimerInfo->m_EventArg.m_TimerHdl = HDL_INC(pTimerInfo->m_EventArg.m_TimerHdl); - *pTimerHdl_p = pTimerInfo->m_EventArg.m_TimerHdl; - - // reject too small time values - if ( (fContinuously_p && (ullTimeNs_p < TIMER_MIN_VAL_CYCLE)) - || (!fContinuously_p && (ullTimeNs_p < TIMER_MIN_VAL_SINGLE)) ) - { - Ret = kEplTimerNoTimerCreated; - goto Exit; - } - - pTimerInfo->m_EventArg.m_ulArg = ulArgument_p; - pTimerInfo->m_pfnCallback = pfnCallback_p; - pTimerInfo->m_fContinuously = fContinuously_p; - pTimerInfo->m_ullPeriod = ullTimeNs_p; - - /* - * HRTIMER_MODE_REL does not influence general handling of this timer. - * It only sets relative mode for this start operation. - * -> Expire time is calculated by: Now + RelTime - * hrtimer_start also skips pending timer events. - * The state HRTIMER_STATE_CALLBACK is ignored. - * We have to cope with that in our callback function. - */ - RelTime = ktime_add_ns(ktime_set(0,0), ullTimeNs_p); - hrtimer_start(&pTimerInfo->m_Timer, RelTime, HRTIMER_MODE_REL); - -Exit: - return Ret; + tEplKernel Ret; + unsigned int uiIndex; + tEplTimerHighReskTimerInfo *pTimerInfo; + ktime_t RelTime; + + Ret = kEplSuccessful; + + // check pointer to handle + if (pTimerHdl_p == NULL) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + + if (*pTimerHdl_p == 0) { // no timer created yet + + // search free timer info structure + pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[0]; + for (uiIndex = 0; uiIndex < TIMER_COUNT; + uiIndex++, pTimerInfo++) { + if (pTimerInfo->m_EventArg.m_TimerHdl == 0) { // free structure found + break; + } + } + if (uiIndex >= TIMER_COUNT) { // no free structure found + Ret = kEplTimerNoTimerCreated; + goto Exit; + } + + pTimerInfo->m_EventArg.m_TimerHdl = HDL_INIT(uiIndex); + } else { + uiIndex = HDL_TO_IDX(*pTimerHdl_p); + if (uiIndex >= TIMER_COUNT) { // invalid handle + Ret = kEplTimerInvalidHandle; + goto Exit; + } + + pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; + } + + /* + * increment timer handle + * (if timer expires right after this statement, the user + * would detect an unknown timer handle and discard it) + */ + pTimerInfo->m_EventArg.m_TimerHdl = + HDL_INC(pTimerInfo->m_EventArg.m_TimerHdl); + *pTimerHdl_p = pTimerInfo->m_EventArg.m_TimerHdl; + + // reject too small time values + if ((fContinuously_p && (ullTimeNs_p < TIMER_MIN_VAL_CYCLE)) + || (!fContinuously_p && (ullTimeNs_p < TIMER_MIN_VAL_SINGLE))) { + Ret = kEplTimerNoTimerCreated; + goto Exit; + } + + pTimerInfo->m_EventArg.m_ulArg = ulArgument_p; + pTimerInfo->m_pfnCallback = pfnCallback_p; + pTimerInfo->m_fContinuously = fContinuously_p; + pTimerInfo->m_ullPeriod = ullTimeNs_p; + + /* + * HRTIMER_MODE_REL does not influence general handling of this timer. + * It only sets relative mode for this start operation. + * -> Expire time is calculated by: Now + RelTime + * hrtimer_start also skips pending timer events. + * The state HRTIMER_STATE_CALLBACK is ignored. + * We have to cope with that in our callback function. + */ + RelTime = ktime_add_ns(ktime_set(0, 0), ullTimeNs_p); + hrtimer_start(&pTimerInfo->m_Timer, RelTime, HRTIMER_MODE_REL); + + Exit: + return Ret; } - //--------------------------------------------------------------------------- // // Function: EplTimerHighReskDeleteTimer() @@ -418,64 +403,56 @@ Exit: // //--------------------------------------------------------------------------- -tEplKernel PUBLIC EplTimerHighReskDeleteTimer(tEplTimerHdl* pTimerHdl_p) +tEplKernel PUBLIC EplTimerHighReskDeleteTimer(tEplTimerHdl * pTimerHdl_p) { -tEplKernel Ret = kEplSuccessful; -unsigned int uiIndex; -tEplTimerHighReskTimerInfo* pTimerInfo; - - // check pointer to handle - if(pTimerHdl_p == NULL) - { - Ret = kEplTimerInvalidHandle; - goto Exit; - } - - if (*pTimerHdl_p == 0) - { // no timer created yet - goto Exit; - } - else - { - uiIndex = HDL_TO_IDX(*pTimerHdl_p); - if (uiIndex >= TIMER_COUNT) - { // invalid handle - Ret = kEplTimerInvalidHandle; - goto Exit; - } - pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; - if (pTimerInfo->m_EventArg.m_TimerHdl != *pTimerHdl_p) - { // invalid handle - goto Exit; - } - } - - *pTimerHdl_p = 0; - pTimerInfo->m_EventArg.m_TimerHdl = 0; - pTimerInfo->m_pfnCallback = NULL; - - /* - * Three return cases of hrtimer_try_to_cancel have to be tracked: - * 1 - timer has been removed - * 0 - timer was not active - * We need not do anything. hrtimer timers just consist of - * a hrtimer struct, which we might enqueue in the hrtimers - * event list by calling hrtimer_start(). - * If a timer is not enqueued, it is not present in hrtimers. - * -1 - callback function is running - * In this case we have to ensure that the timer is not - * continuously restarted. This has been done by clearing - * its handle. - */ - hrtimer_try_to_cancel(&pTimerInfo->m_Timer); - -Exit: - return Ret; + tEplKernel Ret = kEplSuccessful; + unsigned int uiIndex; + tEplTimerHighReskTimerInfo *pTimerInfo; + + // check pointer to handle + if (pTimerHdl_p == NULL) { + Ret = kEplTimerInvalidHandle; + goto Exit; + } + + if (*pTimerHdl_p == 0) { // no timer created yet + goto Exit; + } else { + uiIndex = HDL_TO_IDX(*pTimerHdl_p); + if (uiIndex >= TIMER_COUNT) { // invalid handle + Ret = kEplTimerInvalidHandle; + goto Exit; + } + pTimerInfo = &EplTimerHighReskInstance_l.m_aTimerInfo[uiIndex]; + if (pTimerInfo->m_EventArg.m_TimerHdl != *pTimerHdl_p) { // invalid handle + goto Exit; + } + } + + *pTimerHdl_p = 0; + pTimerInfo->m_EventArg.m_TimerHdl = 0; + pTimerInfo->m_pfnCallback = NULL; + + /* + * Three return cases of hrtimer_try_to_cancel have to be tracked: + * 1 - timer has been removed + * 0 - timer was not active + * We need not do anything. hrtimer timers just consist of + * a hrtimer struct, which we might enqueue in the hrtimers + * event list by calling hrtimer_start(). + * If a timer is not enqueued, it is not present in hrtimers. + * -1 - callback function is running + * In this case we have to ensure that the timer is not + * continuously restarted. This has been done by clearing + * its handle. + */ + hrtimer_try_to_cancel(&pTimerInfo->m_Timer); + + Exit: + return Ret; } - - //--------------------------------------------------------------------------- // // Function: EplTimerHighReskCallback() @@ -490,66 +467,63 @@ Exit: // //--------------------------------------------------------------------------- -enum hrtimer_restart EplTimerHighReskCallback (struct hrtimer* pTimer_p) +enum hrtimer_restart EplTimerHighReskCallback(struct hrtimer *pTimer_p) { -unsigned int uiIndex; -tEplTimerHighReskTimerInfo* pTimerInfo; -tEplTimerHdl OrgTimerHdl; -enum hrtimer_restart Ret; - - BENCHMARK_MOD_24_SET(4); - - Ret = HRTIMER_NORESTART; - pTimerInfo = container_of(pTimer_p, tEplTimerHighReskTimerInfo, m_Timer); - uiIndex = HDL_TO_IDX(pTimerInfo->m_EventArg.m_TimerHdl); - if (uiIndex >= TIMER_COUNT) - { // invalid handle - goto Exit; - } - - /* - * We store the timer handle before calling the callback function - * as the timer can be modified inside it. - */ - OrgTimerHdl = pTimerInfo->m_EventArg.m_TimerHdl; - - if (pTimerInfo->m_pfnCallback != NULL) - { - pTimerInfo->m_pfnCallback(&pTimerInfo->m_EventArg); - } - - if (pTimerInfo->m_fContinuously) - { - ktime_t Interval; + unsigned int uiIndex; + tEplTimerHighReskTimerInfo *pTimerInfo; + tEplTimerHdl OrgTimerHdl; + enum hrtimer_restart Ret; + + BENCHMARK_MOD_24_SET(4); + + Ret = HRTIMER_NORESTART; + pTimerInfo = + container_of(pTimer_p, tEplTimerHighReskTimerInfo, m_Timer); + uiIndex = HDL_TO_IDX(pTimerInfo->m_EventArg.m_TimerHdl); + if (uiIndex >= TIMER_COUNT) { // invalid handle + goto Exit; + } + + /* + * We store the timer handle before calling the callback function + * as the timer can be modified inside it. + */ + OrgTimerHdl = pTimerInfo->m_EventArg.m_TimerHdl; + + if (pTimerInfo->m_pfnCallback != NULL) { + pTimerInfo->m_pfnCallback(&pTimerInfo->m_EventArg); + } + + if (pTimerInfo->m_fContinuously) { + ktime_t Interval; #ifdef PROVE_OVERRUN - ktime_t Now; - unsigned long Overruns; + ktime_t Now; + unsigned long Overruns; #endif - if (OrgTimerHdl != pTimerInfo->m_EventArg.m_TimerHdl) - { - /* modified timer has already been restarted */ - goto Exit; - } - + if (OrgTimerHdl != pTimerInfo->m_EventArg.m_TimerHdl) { + /* modified timer has already been restarted */ + goto Exit; + } #ifdef PROVE_OVERRUN - Now = ktime_get(); - Interval = ktime_add_ns(ktime_set(0,0), pTimerInfo->m_ullPeriod); - Overruns = hrtimer_forward(pTimer_p, Now, Interval); - if (Overruns > 1) - { - printk("EplTimerHighResk: Continuous timer (handle 0x%lX) had to skip %lu interval(s)!\n", pTimerInfo->m_EventArg.m_TimerHdl, Overruns-1); - } + Now = ktime_get(); + Interval = + ktime_add_ns(ktime_set(0, 0), pTimerInfo->m_ullPeriod); + Overruns = hrtimer_forward(pTimer_p, Now, Interval); + if (Overruns > 1) { + printk + ("EplTimerHighResk: Continuous timer (handle 0x%lX) had to skip %lu interval(s)!\n", + pTimerInfo->m_EventArg.m_TimerHdl, Overruns - 1); + } #else - pTimer_p->expires = ktime_add_ns(pTimer_p->expires, - pTimerInfo->m_ullPeriod); + pTimer_p->expires = ktime_add_ns(pTimer_p->expires, + pTimerInfo->m_ullPeriod); #endif - Ret = HRTIMER_RESTART; - } + Ret = HRTIMER_RESTART; + } -Exit: - BENCHMARK_MOD_24_RESET(4); - return Ret; + Exit: + BENCHMARK_MOD_24_RESET(4); + return Ret; } - |