static void
pcn_reclaim(pcn_t *pcnp)
{
pcn_tx_desc_t *tmdp;
while (pcnp->pcn_txavail != PCN_TXRING) {
int index = pcnp->pcn_txreclaim;
tmdp = &pcnp->pcn_txdescp[index];
/* sync before reading */
SYNCTXDESC(pcnp, index, DDI_DMA_SYNC_FORKERNEL);
/* check if chip is still working on it */
if (tmdp->pcn_txctl & PCN_TXCTL_OWN)
break;
pcnp->pcn_txavail++;
pcnp->pcn_txreclaim = (index + 1) % PCN_TXRING;
}
if (pcnp->pcn_txavail >= PCN_TXRESCHED) {
if (pcnp->pcn_wantw) {
pcnp->pcn_wantw = B_FALSE;
/* Disable TX interrupt */
PCN_CSR_CLRBIT(pcnp, PCN_CSR_EXTCTL1,
PCN_EXTCTL1_LTINTEN);
mac_tx_update(pcnp->pcn_mh);
}
}
}
static void
pcn_startall(pcn_t *pcnp)
{
ASSERT(mutex_owned(&pcnp->pcn_intrlock));
ASSERT(mutex_owned(&pcnp->pcn_xmtlock));
(void) pcn_initialize(pcnp, B_FALSE);
/* Start chip and enable interrupts */
PCN_CSR_SETBIT(pcnp, PCN_CSR_CSR, PCN_CSR_START|PCN_CSR_INTEN);
pcn_start_timer(pcnp);
if (IS_RUNNING(pcnp))
mac_tx_update(pcnp->pcn_mh);
}
/*
* function to drain a TxCQ and process its CQEs
*
* dev - software handle to the device
* cq - pointer to the cq to drain
*
* return the number of CQEs processed
*/
uint16_t
oce_drain_wq_cq(void *arg)
{
uint16_t num_cqe = 0;
struct oce_dev *dev;
struct oce_wq *wq;
wq = (struct oce_wq *)arg;
dev = wq->parent;
/* do while we do not reach a cqe that is not valid */
num_cqe = oce_process_tx_compl(wq, B_FALSE);
/* check if we need to restart Tx */
if (wq->resched && num_cqe) {
wq->resched = B_FALSE;
mac_tx_update(dev->mac_handle);
}
return (num_cqe);
} /* oce_process_wq_cqe */
/*
* ISR/periodic callbacks.
*/
uint_t
efe_intr(caddr_t arg1, caddr_t arg2)
{
efe_t *efep = (void *)arg1;
uint32_t status;
mblk_t *mp = NULL;
_NOTE(ARGUNUSED(arg2));
mutex_enter(&efep->efe_intrlock);
if (efep->efe_flags & FLAG_SUSPENDED) {
mutex_exit(&efep->efe_intrlock);
return (DDI_INTR_UNCLAIMED);
}
status = GETCSR(efep, CSR_INTSTAT);
if (!(status & INTSTAT_ACTV)) {
mutex_exit(&efep->efe_intrlock);
return (DDI_INTR_UNCLAIMED);
}
PUTCSR(efep, CSR_INTSTAT, status);
if (status & INTSTAT_RCC) {
mp = efe_recv(efep);
}
if (status & INTSTAT_RQE) {
efep->efe_ierrors++;
efep->efe_macrcv_errors++;
/* Kick the receiver */
PUTCSR(efep, CSR_COMMAND, COMMAND_RXQUEUED);
}
if (status & INTSTAT_TXC) {
mutex_enter(&efep->efe_txlock);
efe_send_done(efep);
mutex_exit(&efep->efe_txlock);
}
if (status & INTSTAT_FATAL) {
mutex_enter(&efep->efe_txlock);
efe_error(efep->efe_dip, "bus error; resetting!");
efe_restart(efep);
mutex_exit(&efep->efe_txlock);
}
mutex_exit(&efep->efe_intrlock);
if (mp != NULL) {
mac_rx(efep->efe_mh, NULL, mp);
}
if (status & INTSTAT_TXC) {
mac_tx_update(efep->efe_mh);
}
if (status & INTSTAT_FATAL) {
mii_reset(efep->efe_miih);
}
return (DDI_INTR_CLAIMED);
}
