/*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 */ }