pintr.c revision 1.5
1/* NetBSD: intr.c,v 1.15 2004/04/10 14:49:55 kochi Exp */ 2 3/* 4 * Copyright 2002 (c) Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Frank van der Linden for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38/*- 39 * Copyright (c) 1991 The Regents of the University of California. 40 * All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * William Jolitz. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 * 69 * @(#)isa.c 7.2 (Berkeley) 5/13/91 70 */ 71/*- 72 * Copyright (c) 1993, 1994 Charles Hannum. 73 * 74 * Redistribution and use in source and binary forms, with or without 75 * modification, are permitted provided that the following conditions 76 * are met: 77 * 1. Redistributions of source code must retain the above copyright 78 * notice, this list of conditions and the following disclaimer. 79 * 2. Redistributions in binary form must reproduce the above copyright 80 * notice, this list of conditions and the following disclaimer in the 81 * documentation and/or other materials provided with the distribution. 82 * 3. All advertising materials mentioning features or use of this software 83 * must display the following acknowledgement: 84 * This product includes software developed by the University of 85 * California, Berkeley and its contributors. 86 * 4. Neither the name of the University nor the names of its contributors 87 * may be used to endorse or promote products derived from this software 88 * without specific prior written permission. 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 91 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 92 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 93 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 94 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 95 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 96 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 97 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 98 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 99 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 100 * SUCH DAMAGE. 101 * 102 * @(#)isa.c 7.2 (Berkeley) 5/13/91 103 */ 104 105#include <sys/cdefs.h> 106__KERNEL_RCSID(0, "$NetBSD: pintr.c,v 1.5 2018/10/06 16:44:55 cherry Exp $"); 107 108#include "opt_multiprocessor.h" 109#include "opt_xen.h" 110#include "isa.h" 111#include "pci.h" 112 113#include <sys/param.h> 114#include <sys/systm.h> 115#include <sys/kernel.h> 116#include <sys/syslog.h> 117#include <sys/device.h> 118#include <sys/malloc.h> 119#include <sys/proc.h> 120#include <sys/errno.h> 121#include <sys/cpu.h> 122 123#include <uvm/uvm_extern.h> 124 125#include <machine/i8259.h> 126#include <machine/pio.h> 127#include <xen/evtchn.h> 128#include <xen/intr.h> 129 130#include "acpica.h" 131#include "ioapic.h" 132#include "opt_mpbios.h" 133 134#if NIOAPIC > 0 135/* XXX: todo - compat with lapic.c and XEN for x2apic */ 136bool x2apic_mode __read_mostly = false; 137/* for x86/i8259.c */ 138struct intrstub legacy_stubs[NUM_LEGACY_IRQS] = {{0,0}}; 139/* for x86/ioapic.c */ 140struct intrstub ioapic_edge_stubs[MAX_INTR_SOURCES] = {{0,0}}; 141struct intrstub ioapic_level_stubs[MAX_INTR_SOURCES] = {{0,0}}; 142struct intrstub x2apic_edge_stubs[MAX_INTR_SOURCES] = {{0,0}}; 143struct intrstub x2apic_level_stubs[MAX_INTR_SOURCES] = {{0,0}}; 144#include <machine/i82093var.h> 145int irq2port[NR_EVENT_CHANNELS] = {0}; /* actually port + 1, so that 0 is invaid */ 146int irq2vect[256] = {0}; 147int vect2irq[256] = {0}; 148#endif /* NIOAPIC */ 149#if NACPICA > 0 150#include <machine/mpconfig.h> 151#include <machine/mpacpi.h> 152#endif 153#ifdef MPBIOS 154#include <machine/mpbiosvar.h> 155#endif 156 157#if NPCI > 0 158#include <dev/pci/ppbreg.h> 159#endif 160 161#if defined(DOM0OPS) || NPCI > 0 162int 163xen_pirq_alloc(intr_handle_t *pirq, int type) 164{ 165 physdev_op_t op; 166 int irq = *pirq; 167#if NIOAPIC > 0 168 169 /* 170 * The hypervisor has already allocated vectors and IRQs for the 171 * devices. Reusing the same IRQ doesn't work because as we bind 172 * them for each devices, we can't then change the route entry 173 * of the next device if this one used this IRQ. The easiest is 174 * to allocate IRQs top-down, starting with a high number. 175 * 250 and 230 have been tried, but got rejected by Xen. 176 * 177 * Xen 3.5 also rejects 200. Try out all values until Xen accepts 178 * or none is available. 179 */ 180 static int xen_next_irq = 200; 181 struct ioapic_softc *ioapic = ioapic_find(APIC_IRQ_APIC(*pirq)); 182 int pin = APIC_IRQ_PIN(*pirq); 183 184 if (*pirq & APIC_INT_VIA_APIC) { 185 irq = vect2irq[ioapic->sc_pins[pin].ip_vector]; 186 if (ioapic->sc_pins[pin].ip_vector == 0 || irq == 0) { 187 /* allocate IRQ */ 188 irq = APIC_IRQ_LEGACY_IRQ(*pirq); 189 if (irq <= 0 || irq > 15) 190 irq = xen_next_irq--; 191retry: 192 /* allocate vector and route interrupt */ 193 op.cmd = PHYSDEVOP_ASSIGN_VECTOR; 194 op.u.irq_op.irq = irq; 195 if (HYPERVISOR_physdev_op(&op) < 0) { 196 irq = xen_next_irq--; 197 if (xen_next_irq == 15) 198 panic("PHYSDEVOP_ASSIGN_VECTOR irq %d", irq); 199 goto retry; 200 } 201 KASSERT(irq2vect[irq] == 0 || 202 (irq > 0 && irq < 16 && 203 irq2vect[irq] == op.u.irq_op.vector)); 204 irq2vect[irq] = op.u.irq_op.vector; 205 KASSERT(vect2irq[op.u.irq_op.vector] == 0 || 206 (irq > 0 && irq < 16 && 207 vect2irq[op.u.irq_op.vector] == irq)); 208 vect2irq[op.u.irq_op.vector] = irq; 209 } 210 *pirq &= ~0xff; 211 *pirq |= irq; 212 } else 213#endif /* NIOAPIC */ 214 { 215 if (irq2port[irq] == 0) { 216 op.cmd = PHYSDEVOP_ASSIGN_VECTOR; 217 op.u.irq_op.irq = irq; 218 if (HYPERVISOR_physdev_op(&op) < 0) { 219 panic("PHYSDEVOP_ASSIGN_VECTOR irq %d", irq); 220 } 221 KASSERT(irq2vect[irq] == 0); 222 irq2vect[irq] = op.u.irq_op.vector; 223 KASSERT(vect2irq[op.u.irq_op.vector] == 0); 224 vect2irq[op.u.irq_op.vector] = irq; 225 KASSERT(irq2port[irq] == 0); 226 irq2port[irq] = bind_pirq_to_evtch(irq) + 1; 227 } 228 } 229 return (irq2vect[irq]); 230} 231#endif /* defined(DOM0OPS) || NPCI > 0 */ 232