/* Synchronousinterrupt handler, this handler kicks off all interrupt processing.*/
A_STATUS DevDsrHandler(void *context)
{
AR6K_DEVICE *pDev = (AR6K_DEVICE *)context;
A_STATUS status = A_OK;
A_BOOL done = FALSE;
A_BOOL asyncProc = FALSE;
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,("+DevDsrHandler: (dev: 0x%X)\n", (A_UINT32)pDev));
while (!done) {
status = ProcessPendingIRQs(pDev, &done, &asyncProc);
if (A_FAILED(status)) {
break;
}
if (HIF_DEVICE_IRQ_SYNC_ONLY == pDev->HifIRQProcessingMode) {
/* the HIF layer does not allow async IRQ processing, override the asyncProc flag */
asyncProc = FALSE;
/* this will cause us to re-enter ProcessPendingIRQ() and re-read interrupt status registers.
* this has a nice side effect of blocking us until all async read requests are completed.
* This behavior is required on some HIF implementations that do not allow ASYNC
* processing in interrupt handlers (like Windows CE) */
}
if (asyncProc) {
/* the function performed some async I/O for performance, we
need to exit the ISR immediately, the check below will prevent the interrupt from being
Ack'd while we handle it asynchronously */
break;
}
}
if (A_SUCCESS(status) && !asyncProc) {
/* Ack the interrupt only if :
* 1. we did not get any errors in processing interrupts
* 2. there are no outstanding async processing requests */
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,(" Acking interrupt from DevDsrHandler \n"));
HIFAckInterrupt(pDev->HIFDevice);
}
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,("-DevDsrHandler \n"));
return status;
}
/* Synchronousinterrupt handler, this handler kicks off all interrupt processing.*/
int DevDsrHandler(void *context)
{
AR6K_DEVICE *pDev = (AR6K_DEVICE *)context;
int status = 0;
bool done = false;
bool asyncProc = false;
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,("+DevDsrHandler: (dev: 0x%lX)\n", (unsigned long)pDev));
/* reset the recv counter that tracks when we need to yield from the DSR */
pDev->CurrentDSRRecvCount = 0;
/* reset counter used to flag a re-scan of IRQ status registers on the target */
pDev->RecheckIRQStatusCnt = 0;
while (!done) {
status = ProcessPendingIRQs(pDev, &done, &asyncProc);
if (status) {
break;
}
if (HIF_DEVICE_IRQ_SYNC_ONLY == pDev->HifIRQProcessingMode) {
/* the HIF layer does not allow async IRQ processing, override the asyncProc flag */
asyncProc = false;
/* this will cause us to re-enter ProcessPendingIRQ() and re-read interrupt status registers.
* this has a nice side effect of blocking us until all async read requests are completed.
* This behavior is required on some HIF implementations that do not allow ASYNC
* processing in interrupt handlers (like Windows CE) */
if (pDev->DSRCanYield && DEV_CHECK_RECV_YIELD(pDev)) {
/* ProcessPendingIRQs() pulled enough recv messages to satisfy the yield count, stop
* checking for more messages and return */
break;
}
}
if (asyncProc) {
/* the function performed some async I/O for performance, we
need to exit the ISR immediately, the check below will prevent the interrupt from being
Ack'd while we handle it asynchronously */
break;
}
}
if (!status && !asyncProc) {
/* Ack the interrupt only if :
* 1. we did not get any errors in processing interrupts
* 2. there are no outstanding async processing requests */
if (pDev->DSRCanYield) {
/* if the DSR can yield do not ACK the interrupt, there could be more pending messages.
* The HIF layer must ACK the interrupt on behalf of HTC */
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,(" Yield in effect (cur RX count: %d) \n", pDev->CurrentDSRRecvCount));
} else {
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,(" Acking interrupt from DevDsrHandler \n"));
HIFAckInterrupt(pDev->HIFDevice);
}
}
AR_DEBUG_PRINTF(ATH_DEBUG_IRQ,("-DevDsrHandler \n"));
return status;
}
