/*ARGSUSED*/
irqreturn_t
hubii_eint_handler (int irq, void *arg, struct pt_regs *ep)
{
vertex_hdl_t hub_v;
hubinfo_t hinfo;
ii_wstat_u_t wstat;
hubreg_t idsr;
ii_ilcsr_u_t ilcsr;
/* two levels of casting avoids compiler warning.!! */
hub_v = (vertex_hdl_t)(long)(arg);
ASSERT(hub_v);
hubinfo_get(hub_v, &hinfo);
idsr = REMOTE_HUB_L(hinfo->h_nasid, IIO_ICMR);
#if 0
if (idsr & 0x1) {
/* ICMR bit is set .. we are getting into "Spurious Interrupts condition. */
printk("Cnode %d II has seen the ICMR condition\n", hinfo->h_cnodeid);
printk("***** Please file PV with the above messages *****\n");
/* panic("We have to panic to prevent further unknown states ..\n"); */
}
#endif
/*
* Identify the reason for error.
*/
wstat.ii_wstat_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_WSTAT);
if (wstat.ii_wstat_fld_s.w_crazy) {
char *reason;
/*
* We can do a couple of things here.
* Look at the fields TX_MX_RTY/XT_TAIL_TO/XT_CRD_TO to check
* which of these caused the CRAZY bit to be set.
* You may be able to check if the Link is up really.
*/
if (wstat.ii_wstat_fld_s.w_tx_mx_rty)
reason = "Micro Packet Retry Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_tail_to)
reason = "Crosstalk Tail Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_crd_to)
reason = "Crosstalk Credit Timeout";
else {
hubreg_t hubii_imem;
/*
* Check if widget 0 has been marked as shutdown, or
* if BTE 0/1 has been marked.
*/
hubii_imem = REMOTE_HUB_L(hinfo->h_nasid, IIO_IMEM);
if (hubii_imem & IIO_IMEM_W0ESD)
reason = "Hub Widget 0 has been Shutdown";
else if (hubii_imem & IIO_IMEM_B0ESD)
reason = "BTE 0 has been shutdown";
else if (hubii_imem & IIO_IMEM_B1ESD)
reason = "BTE 1 has been shutdown";
else reason = "Unknown";
}
/*
* Note: we may never be able to print this, if the II talking
* to Xbow which hosts the console is dead.
*/
ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_ILCSR);
if (ilcsr.ii_ilcsr_fld_s.i_llp_en == 1) { /* Link is enabled */
printk("Hub %d, cnode %d to Xtalk Link failed (II_ECRAZY) Reason: %s",
hinfo->h_nasid, hinfo->h_cnodeid, reason);
}
}
/*
* Before processing any interrupt related information, clear all
* error indication and reenable interrupts. This will prevent
* lost interrupts due to the interrupt handler scanning past a PRB/CRB
* which has not errorred yet and then the PRB/CRB goes into error.
* Note, PRB errors are cleared individually.
*/
REMOTE_HUB_S(hinfo->h_nasid, IIO_IECLR, 0xff0000);
idsr = REMOTE_HUB_L(hinfo->h_nasid, IIO_IIDSR) & ~IIO_IIDSR_SENT_MASK;
REMOTE_HUB_S(hinfo->h_nasid, IIO_IIDSR, idsr);
/*
* It's a toss as to which one among PRB/CRB to check first.
* Current decision is based on the severity of the errors.
* IO CRB errors tend to be more severe than PRB errors.
*
* It is possible for BTE errors to have been handled already, so we
* may not see any errors handled here.
*/
(void)hubiio_crb_error_handler(hub_v, hinfo);
(void)hubiio_prb_error_handler(hub_v, hinfo);
return IRQ_HANDLED;
}
/*ARGSUSED*/
void
hubii_eint_handler (int irq, void *arg, struct pt_regs *ep)
{
devfs_handle_t hub_v;
hubinfo_t hinfo;
ii_wstat_u_t wstat;
hubreg_t idsr;
panic("Hubii interrupt\n");
#ifdef ajm
/*
* If the NI has a problem, everyone has a problem. We shouldn't
* even attempt to handle other errors when an NI error is present.
*/
if (check_ni_errors()) {
hubni_error_handler("II interrupt", 1);
/* NOTREACHED */
}
/* two levels of casting avoids compiler warning.!! */
hub_v = (devfs_handle_t)(long)(arg);
ASSERT(hub_v);
hubinfo_get(hub_v, &hinfo);
/*
* Identify the reason for error.
*/
wstat.ii_wstat_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_WSTAT);
if (wstat.ii_wstat_fld_s.w_crazy) {
char *reason;
/*
* We can do a couple of things here.
* Look at the fields TX_MX_RTY/XT_TAIL_TO/XT_CRD_TO to check
* which of these caused the CRAZY bit to be set.
* You may be able to check if the Link is up really.
*/
if (wstat.ii_wstat_fld_s.w_tx_mx_rty)
reason = "Micro Packet Retry Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_tail_to)
reason = "Crosstalk Tail Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_crd_to)
reason = "Crosstalk Credit Timeout";
else {
hubreg_t hubii_imem;
/*
* Check if widget 0 has been marked as shutdown, or
* if BTE 0/1 has been marked.
*/
hubii_imem = REMOTE_HUB_L(hinfo->h_nasid, IIO_IMEM);
if (hubii_imem & IIO_IMEM_W0ESD)
reason = "Hub Widget 0 has been Shutdown";
else if (hubii_imem & IIO_IMEM_B0ESD)
reason = "BTE 0 has been shutdown";
else if (hubii_imem & IIO_IMEM_B1ESD)
reason = "BTE 1 has been shutdown";
else reason = "Unknown";
}
/*
* Note: we may never be able to print this, if the II talking
* to Xbow which hosts the console is dead.
*/
printk("Hub %d to Xtalk Link failed (II_ECRAZY) Reason: %s",
hinfo->h_cnodeid, reason);
}
/*
* It's a toss as to which one among PRB/CRB to check first.
* Current decision is based on the severity of the errors.
* IO CRB errors tend to be more severe than PRB errors.
*
* It is possible for BTE errors to have been handled already, so we
* may not see any errors handled here.
*/
(void)hubiio_crb_error_handler(hub_v, hinfo);
(void)hubiio_prb_error_handler(hub_v, hinfo);
/*
* If we reach here, it indicates crb/prb handlers successfully
* handled the error. So, re-enable II to send more interrupt
* and return.
*/
REMOTE_HUB_S(hinfo->h_nasid, IIO_IECLR, 0xffffff);
idsr = REMOTE_HUB_L(hinfo->h_nasid, IIO_IIDSR) & ~IIO_IIDSR_SENT_MASK;
REMOTE_HUB_S(hinfo->h_nasid, IIO_IIDSR, idsr);
#endif /* ajm */
}
