/* $NetBSD: pci_kn20aa.c,v 1.19 1996/10/23 04:12:28 cgd Exp $ */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef EVCNT_COUNTERS #include #endif #include "sio.h" #if NSIO #include #endif int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *)); const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t)); void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t, int, int (*func)(void *), void *)); void dec_kn20aa_intr_disestablish __P((void *, void *)); #define KN20AA_PCEB_IRQ 31 #define KN20AA_MAX_IRQ 32 #define PCI_STRAY_MAX 5 struct kn20aa_intrhand { TAILQ_ENTRY(kn20aa_intrhand) ih_q; int (*ih_fun)(); void *ih_arg; u_long ih_count; int ih_level; }; TAILQ_HEAD(kn20aa_intrchain, kn20aa_intrhand); struct kn20aa_intrchain kn20aa_pci_intrs[KN20AA_MAX_IRQ]; int kn20aa_pci_strayintrcnt[KN20AA_MAX_IRQ]; #ifdef EVCNT_COUNTERS struct evcnt kn20aa_intr_evcnt; #endif void kn20aa_pci_strayintr __P((int irq)); void kn20aa_iointr __P((void *framep, unsigned long vec)); void kn20aa_enable_intr __P((int irq)); void kn20aa_disable_intr __P((int irq)); struct kn20aa_intrhand *kn20aa_attach_intr __P((struct kn20aa_intrchain *, int, int (*) (void *), void *)); void pci_kn20aa_pickintr(ccp) struct cia_config *ccp; { int i; struct kn20aa_intrhand *nintrhand; bus_space_tag_t iot = ccp->cc_iot; pci_chipset_tag_t pc = &ccp->cc_pc; for (i = 0; i < KN20AA_MAX_IRQ; i++) TAILQ_INIT(&kn20aa_pci_intrs[i]); pc->pc_intr_v = ccp; pc->pc_intr_map = dec_kn20aa_intr_map; pc->pc_intr_string = dec_kn20aa_intr_string; pc->pc_intr_establish = dec_kn20aa_intr_establish; pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; #if NSIO sio_intr_setup(iot); #endif set_iointr(kn20aa_iointr); #if NSIO kn20aa_enable_intr(KN20AA_PCEB_IRQ); #if 0 /* XXX init PCEB interrupt handler? */ kn20aa_attach_intr(&kn20aa_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???); #endif #endif } int dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) void *ccv; pcitag_t bustag; int buspin, line; pci_intr_handle_t *ihp; { struct cia_config *ccp = ccv; pci_chipset_tag_t pc = &ccp->cc_pc; int device; int kn20aa_irq; void *ih; if (buspin == 0) { /* No IRQ used. */ return 1; } if (buspin > 4) { printf("pci_map_int: bad interrupt pin %d\n", buspin); return 1; } /* * Slot->interrupt translation. Appears to work, though it * may not hold up forever. * * The DEC engineers who did this hardware obviously engaged * in random drug testing. */ pci_decompose_tag(pc, bustag, NULL, &device, NULL); switch (device) { case 11: case 12: kn20aa_irq = ((device - 11) + 0) * 4; break; case 7: kn20aa_irq = 8; break; case 9: kn20aa_irq = 12; break; case 6: /* 21040 on AlphaStation 500 */ kn20aa_irq = 13; break; case 8: kn20aa_irq = 16; break; default: #ifdef KN20AA_BOGUS_IRQ_FROB *ihp = 0xdeadbeef; printf("\n\n BOGUS INTERRUPT MAPPING: dev %d, pin %d\n", device, buspin); return (0); #endif panic("pci_kn20aa_map_int: invalid device number %d\n", device); } kn20aa_irq += buspin - 1; if (kn20aa_irq > KN20AA_MAX_IRQ) panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n", kn20aa_irq); *ihp = kn20aa_irq; return (0); } const char * dec_kn20aa_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { struct cia_config *ccp = ccv; static char irqstr[15]; /* 11 + 2 + NULL + sanity */ #ifdef KN20AA_BOGUS_IRQ_FROB if (ih == 0xdeadbeef) { sprintf(irqstr, "BOGUS"); return (irqstr); } #endif if (ih > KN20AA_MAX_IRQ) panic("dec_kn20aa_a50_intr_string: bogus kn20aa IRQ 0x%x\n", ih); sprintf(irqstr, "kn20aa irq %d", ih); return (irqstr); } void * dec_kn20aa_intr_establish(ccv, ih, level, func, arg) void *ccv, *arg; pci_intr_handle_t ih; int level; int (*func) __P((void *)); { struct cia_config *ccp = ccv; void *cookie; #ifdef KN20AA_BOGUS_IRQ_FROB if (ih == 0xdeadbeef) { int i; char chars[10]; printf("dec_kn20aa_intr_establish: BOGUS IRQ\n"); do { printf("IRQ to enable? "); getstr(chars, 10); i = atoi(chars); } while (i < 0 || i > 32); printf("ENABLING IRQ %d\n", i); kn20aa_enable_intr(i); return ((void *)0xbabefacedeadbeef); } #endif if (ih > KN20AA_MAX_IRQ) panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", ih); cookie = kn20aa_attach_intr(&kn20aa_pci_intrs[ih], level, func, arg); kn20aa_enable_intr(ih); return (cookie); } void dec_kn20aa_intr_disestablish(ccv, cookie) void *ccv, *cookie; { struct cia_config *ccp = ccv; panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ } /* * caught a stray interrupt; notify if not too many seen already. */ void kn20aa_pci_strayintr(irq) int irq; { kn20aa_pci_strayintrcnt[irq]++; if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX) kn20aa_disable_intr(irq); log(LOG_ERR, "stray kn20aa irq %d\n", irq); if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX) log(LOG_ERR, "disabling interrupts on kn20aa irq %d\n", irq); } void kn20aa_iointr(framep, vec) void *framep; unsigned long vec; { struct kn20aa_intrhand *ih; int irq, handled; if (vec >= 0x900) { if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) panic("kn20aa_iointr: vec 0x%x out of range\n", vec); irq = (vec - 0x900) >> 4; #ifdef EVCNT_COUNTERS kn20aa_intr_evcnt.ev_count++; #else if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) panic("kn20aa interrupt counter sizes inconsistent"); intrcnt[INTRCNT_KN20AA_IRQ + irq]++; #endif for (ih = kn20aa_pci_intrs[irq].tqh_first, handled = 0; ih != NULL; ih = ih->ih_q.tqe_next) { int rv; rv = (*ih->ih_fun)(ih->ih_arg); ih->ih_count++; handled = handled || (rv != 0); } if (!handled) kn20aa_pci_strayintr(irq); return; } if (vec >= 0x800) { #if NSIO sio_iointr(framep, vec); #endif return; } panic("kn20aa_iointr: weird vec 0x%x\n", vec); } void kn20aa_enable_intr(irq) int irq; { /* * From disassembling small bits of the OSF/1 kernel: * the following appears to enable a given interrupt request. * "blech." I'd give valuable body parts for better docs or * for a good decompiler. */ alpha_mb(); REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ alpha_mb(); } void kn20aa_disable_intr(irq) int irq; { alpha_mb(); REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ alpha_mb(); } struct kn20aa_intrhand * kn20aa_attach_intr(chain, level, func, arg) struct kn20aa_intrchain *chain; int level; int (*func) __P((void *)); void *arg; { struct kn20aa_intrhand *nintrhand; nintrhand = (struct kn20aa_intrhand *) malloc(sizeof *nintrhand, M_DEVBUF, M_WAITOK); nintrhand->ih_fun = func; nintrhand->ih_arg = arg; nintrhand->ih_count = 0; nintrhand->ih_level = level; TAILQ_INSERT_TAIL(chain, nintrhand, ih_q); return (nintrhand); }