/*---------------------------------------------------------------------------*
* HSCX IRQ Handler
*---------------------------------------------------------------------------*/
void
isic_hscx_irq(register struct isic_softc *sc, u_char ista, int h_chan, u_char ex_irq)
{
register l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
u_char exir = 0;
int activity = -1;
u_char cmd = 0;
NDBGL1(L1_H_IRQ, "%#x", ista);
if(ex_irq)
{
/* get channel extended irq reg */
exir = HSCX_READ(h_chan, H_EXIR);
if(exir & HSCX_EXIR_RFO)
{
chan->stat_RFO++;
NDBGL1(L1_H_XFRERR, "ex_irq: receive data overflow");
}
if((exir & HSCX_EXIR_XDU) && (chan->bprot != BPROT_NONE))/* xmit data underrun */
{
chan->stat_XDU++;
NDBGL1(L1_H_XFRERR, "ex_irq: xmit data underrun");
isic_hscx_cmd(sc, h_chan, HSCX_CMDR_XRES);
if (chan->out_mbuf_head != NULL) /* don't continue to transmit this buffer */
{
i4b_Bfreembuf(chan->out_mbuf_head);
chan->out_mbuf_cur = chan->out_mbuf_head = NULL;
}
}
}
/* rx message end, end of frame */
if(ista & HSCX_ISTA_RME)
{
register int fifo_data_len;
u_char rsta;
int error = 0;
rsta = HSCX_READ(h_chan, H_RSTA);
if((rsta & 0xf0) != 0xa0)
{
if((rsta & HSCX_RSTA_VFR) == 0)
{
chan->stat_VFR++;
cmd |= (HSCX_CMDR_RHR);
NDBGL1(L1_H_XFRERR, "received invalid Frame");
error++;
}
if(rsta & HSCX_RSTA_RDO)
{
chan->stat_RDO++;
NDBGL1(L1_H_XFRERR, "receive data overflow");
error++;
}
if((rsta & HSCX_RSTA_CRC) == 0)
{
chan->stat_CRC++;
cmd |= (HSCX_CMDR_RHR);
NDBGL1(L1_H_XFRERR, "CRC check failed");
error++;
}
if(rsta & HSCX_RSTA_RAB)
{
chan->stat_RAB++;
NDBGL1(L1_H_XFRERR, "Receive message aborted");
error++;
}
}
fifo_data_len = ((HSCX_READ(h_chan, H_RBCL)) &
((sc->sc_bfifolen)-1));
if(fifo_data_len == 0)
fifo_data_len = sc->sc_bfifolen;
/* all error conditions checked, now decide and take action */
if(error == 0)
{
if(chan->in_mbuf == NULL)
{
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 isic_hscx_irq: RME, cannot allocate mbuf!");
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
fifo_data_len -= 1; /* last byte in fifo is RSTA ! */
if((chan->in_len + fifo_data_len) <= BCH_MAX_DATALEN)
{
/* read data from HSCX fifo */
HSCX_RDFIFO(h_chan, chan->in_cbptr, fifo_data_len);
cmd |= (HSCX_CMDR_RMC);
isic_hscx_cmd(sc, h_chan, cmd);
cmd = 0;
chan->in_len += fifo_data_len;
chan->rxcount += fifo_data_len;
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr hdr;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
(*chan->l4_driver->bch_rx_data_ready)(chan->l4_driver_softc);
activity = ACT_RX;
/* mark buffer ptr as unused */
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
else
{
NDBGL1(L1_H_XFRERR, "RAWHDLC rx buffer overflow in RME, in_len=%d, fifolen=%d", chan->in_len, fifo_data_len);
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
cmd |= (HSCX_CMDR_RHR | HSCX_CMDR_RMC);
}
}
else
{
if (chan->in_mbuf != NULL)
{
i4b_Bfreembuf(chan->in_mbuf);
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
cmd |= (HSCX_CMDR_RMC);
}
}
/* rx fifo full */
if(ista & HSCX_ISTA_RPF)
{
if(chan->in_mbuf == NULL)
{
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 isic_hscx_irq: RPF, cannot allocate mbuf!");
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
chan->rxcount += sc->sc_bfifolen;
if((chan->in_len + sc->sc_bfifolen) <= BCH_MAX_DATALEN)
{
/* read data from HSCX fifo */
HSCX_RDFIFO(h_chan, chan->in_cbptr, sc->sc_bfifolen);
chan->in_cbptr += sc->sc_bfifolen;
chan->in_len += sc->sc_bfifolen;
}
else
{
if(chan->bprot == BPROT_NONE)
{
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr hdr;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr,chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
/* silence detection */
if(!(isdn_bchan_silence(chan->in_mbuf->m_data, chan->in_mbuf->m_len)))
activity = ACT_RX;
if(!(IF_QFULL(&chan->rx_queue)))
{
IF_ENQUEUE(&chan->rx_queue, chan->in_mbuf);
}
else
{
i4b_Bfreembuf(chan->in_mbuf);
}
/* signal upper driver that data is available */
(*chan->l4_driver->bch_rx_data_ready)(chan->l4_driver_softc);
/* alloc new buffer */
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 isic_hscx_irq: RPF, cannot allocate new mbuf!");
/* setup new data ptr */
chan->in_cbptr = chan->in_mbuf->m_data;
/* read data from HSCX fifo */
HSCX_RDFIFO(h_chan, chan->in_cbptr, sc->sc_bfifolen);
chan->in_cbptr += sc->sc_bfifolen;
chan->in_len = sc->sc_bfifolen;
chan->rxcount += sc->sc_bfifolen;
}
else
{
NDBGL1(L1_H_XFRERR, "RAWHDLC rx buffer overflow in RPF, in_len=%d", chan->in_len);
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
cmd |= (HSCX_CMDR_RHR);
}
}
/* command to release fifo space */
cmd |= HSCX_CMDR_RMC;
}
/* transmit fifo empty, new data can be written to fifo */
if(ista & HSCX_ISTA_XPR)
{
/*
* for a description what is going on here, please have
* a look at isic_bchannel_start() in i4b_bchan.c !
*/
int len;
int nextlen;
NDBGL1(L1_H_IRQ, "%s, chan %d - XPR, Tx Fifo Empty!", device_xname(sc->sc_dev), h_chan);
if(chan->out_mbuf_cur == NULL) /* last frame is transmitted */
{
IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
if(chan->out_mbuf_head == NULL)
{
chan->state &= ~HSCX_TX_ACTIVE;
(*chan->l4_driver->bch_tx_queue_empty)(chan->l4_driver_softc);
}
else
{
chan->state |= HSCX_TX_ACTIVE;
chan->out_mbuf_cur = chan->out_mbuf_head;
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
if(sc->sc_trace & TRACE_B_TX)
{
i4b_trace_hdr hdr;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
if(chan->bprot == BPROT_NONE)
{
if(!(isdn_bchan_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
activity = ACT_TX;
}
else
{
activity = ACT_TX;
}
}
}
len = 0;
while(chan->out_mbuf_cur && len != sc->sc_bfifolen)
{
nextlen = min(chan->out_mbuf_cur_len, sc->sc_bfifolen - len);
#ifdef NOTDEF
printf("i:mh=%x, mc=%x, mcp=%x, mcl=%d l=%d nl=%d # ",
chan->out_mbuf_head,
chan->out_mbuf_cur,
chan->out_mbuf_cur_ptr,
chan->out_mbuf_cur_len,
len,
next_len);
#endif
isic_hscx_waitxfw(sc, h_chan); /* necessary !!! */
HSCX_WRFIFO(h_chan, chan->out_mbuf_cur_ptr, nextlen);
cmd |= HSCX_CMDR_XTF;
len += nextlen;
chan->txcount += nextlen;
chan->out_mbuf_cur_ptr += nextlen;
chan->out_mbuf_cur_len -= nextlen;
if(chan->out_mbuf_cur_len == 0)
{
if((chan->out_mbuf_cur = chan->out_mbuf_cur->m_next) != NULL)
{
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
if(sc->sc_trace & TRACE_B_TX)
{
i4b_trace_hdr hdr;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
}
else
{
if (chan->bprot != BPROT_NONE)
cmd |= HSCX_CMDR_XME;
i4b_Bfreembuf(chan->out_mbuf_head);
chan->out_mbuf_head = NULL;
}
}
}
}
if(cmd) /* is there a command for the HSCX ? */
{
isic_hscx_cmd(sc, h_chan, cmd); /* yes, to HSCX */
}
/* call timeout handling routine */
if(activity == ACT_RX || activity == ACT_TX)
(*chan->l4_driver->bch_activity)(chan->l4_driver_softc, activity);
}
/*
* this is the real interrupt routine
*/
static void
avm_pnp_hscx_intr(int h_chan, int stat, int cnt, struct isic_softc *sc)
{
register isic_Bchan_t *chan = &sc->sc_chan[h_chan];
int activity = -1;
DBGL1(L1_H_IRQ, "avm_pnp_hscx_intr", ("%#x\n", stat));
if((stat & HSCX_INT_XDU) && (chan->bprot != BPROT_NONE))/* xmit data underrun */
{
chan->stat_XDU++;
DBGL1(L1_H_XFRERR, "avm_pnp_hscx_intr", ("xmit data underrun\n"));
/* abort the transmission */
sc->avma1pp_txl = 0;
sc->avma1pp_cmd |= HSCX_CMD_XRS;
hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
sc->avma1pp_cmd &= ~HSCX_CMD_XRS;
hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
if (chan->out_mbuf_head != NULL) /* don't continue to transmit this buffer */
{
i4b_Bfreembuf(chan->out_mbuf_head);
chan->out_mbuf_cur = chan->out_mbuf_head = NULL;
}
}
/*
* The following is based on examination of the Linux driver.
*
* The logic here is different than with a "real" HSCX; all kinds
* of information (interrupt/status bits) are in stat.
* HSCX_INT_RPR indicates a receive interrupt
* HSCX_STAT_RDO indicates an overrun condition, abort -
* otherwise read the bytes ((stat & HSCX_STZT_RML_MASK) >> 8)
* HSCX_STAT_RME indicates end-of-frame and apparently any
* CRC/framing errors are only reported in this state.
* if ((stat & HSCX_STAT_CRCVFRRAB) != HSCX_STAT_CRCVFR)
* CRC/framing error
*/
if(stat & HSCX_INT_RPR)
{
register int fifo_data_len;
int error = 0;
/* always have to read the FIFO, so use a scratch buffer */
u_char scrbuf[HSCX_FIFO_LEN];
if(stat & HSCX_STAT_RDO)
{
chan->stat_RDO++;
DBGL1(L1_H_XFRERR, "avm_pnp_hscx_intr", ("receive data overflow\n"));
error++;
}
fifo_data_len = cnt;
if(fifo_data_len == 0)
fifo_data_len = sc->sc_bfifolen;
/* ALWAYS read data from HSCX fifo */
HSCX_RDFIFO(h_chan, scrbuf, fifo_data_len);
chan->rxcount += fifo_data_len;
/* all error conditions checked, now decide and take action */
if(error == 0)
{
if(chan->in_mbuf == NULL)
{
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 avm_pnp_hscx_intr: RME, cannot allocate mbuf!\n");
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
if((chan->in_len + fifo_data_len) <= BCH_MAX_DATALEN)
{
/* OK to copy the data */
bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
chan->in_cbptr += fifo_data_len;
chan->in_len += fifo_data_len;
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr_t hdr;
hdr.unit = sc->sc_unit;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
if (stat & HSCX_STAT_RME)
{
if((stat & HSCX_STAT_CRCVFRRAB) == HSCX_STAT_CRCVFR)
{
(*chan->drvr_linktab->bch_rx_data_ready)(chan->drvr_linktab->unit);
activity = ACT_RX;
/* mark buffer ptr as unused */
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
else
{
chan->stat_CRC++;
DBGL1(L1_H_XFRERR, "avm_pnp_hscx_intr", ("CRC/RAB\n"));
if (chan->in_mbuf != NULL)
{
i4b_Bfreembuf(chan->in_mbuf);
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
}
}
} /* END enough space in mbuf */
else
{
if(chan->bprot == BPROT_NONE)
{
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr_t hdr;
hdr.unit = sc->sc_unit;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
/* move rx'd data to rx queue */
IF_ENQUEUE(&chan->rx_queue, chan->in_mbuf);
(*chan->drvr_linktab->bch_rx_data_ready)(chan->drvr_linktab->unit);
if(!(isic_hscx_silence(chan->in_mbuf->m_data, chan->in_mbuf->m_len)))
activity = ACT_RX;
/* alloc new buffer */
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 avm_pnp_hscx_intr: RPF, cannot allocate new mbuf!\n");
/* setup new data ptr */
chan->in_cbptr = chan->in_mbuf->m_data;
/* OK to copy the data */
bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
chan->in_cbptr += fifo_data_len;
chan->in_len = fifo_data_len;
chan->rxcount += fifo_data_len;
}
else
{
DBGL1(L1_H_XFRERR, "avm_pnp_hscx_intr", ("RAWHDLC rx buffer overflow in RPF, in_len=%d\n", chan->in_len));
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
}
} /* if(error == 0) */
else
{
/* land here for RDO */
if (chan->in_mbuf != NULL)
{
i4b_Bfreembuf(chan->in_mbuf);
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
sc->avma1pp_txl = 0;
sc->avma1pp_cmd |= HSCX_CMD_RRS;
hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
sc->avma1pp_cmd &= ~HSCX_CMD_RRS;
hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
}
}
/* transmit fifo empty, new data can be written to fifo */
if(stat & HSCX_INT_XPR)
{
/*
* for a description what is going on here, please have
* a look at isic_bchannel_start() in i4b_bchan.c !
*/
DBGL1(L1_H_IRQ, "avm_pnp_hscx_intr", ("unit %d, chan %d - XPR, Tx Fifo Empty!\n", sc->sc_unit, h_chan));
if(chan->out_mbuf_cur == NULL || chan->out_mbuf_head == NULL) /* last frame is transmitted */
{
IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
if(chan->out_mbuf_head == NULL)
{
chan->state &= ~HSCX_TX_ACTIVE;
(*chan->drvr_linktab->bch_tx_queue_empty)(chan->drvr_linktab->unit);
}
else
{
chan->state |= HSCX_TX_ACTIVE;
chan->out_mbuf_cur = chan->out_mbuf_head;
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
if(sc->sc_trace & TRACE_B_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = sc->sc_unit;
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
if(chan->bprot == BPROT_NONE)
{
if(!(isic_hscx_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
activity = ACT_TX;
}
else
{
activity = ACT_TX;
}
}
}
isic_hscx_fifo(chan, sc);
}
/* call timeout handling routine */
if(activity == ACT_RX || activity == ACT_TX)
(*chan->drvr_linktab->bch_activity)(chan->drvr_linktab->unit, activity);
}