1 /* $NetBSD: pci_intr_machdep.c,v 1.9 2008/05/03 17:03:45 cegger Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 35 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Charles M. Hannum. 48 * 4. The name of the author may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 /* 64 * Machine-specific functions for PCI autoconfiguration. 65 * 66 * On PCs, there are two methods of generating PCI configuration cycles. 67 * We try to detect the appropriate mechanism for this machine and set 68 * up a few function pointers to access the correct method directly. 69 * 70 * The configuration method can be hard-coded in the config file by 71 * using `options PCI_CONF_MODE=N', where `N' is the configuration mode 72 * as defined section 3.6.4.1, `Generating Configuration Cycles'. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.9 2008/05/03 17:03:45 cegger Exp $"); 77 78 #include <sys/types.h> 79 #include <sys/param.h> 80 #include <sys/time.h> 81 #include <sys/systm.h> 82 #include <sys/errno.h> 83 #include <sys/device.h> 84 #include <sys/intr.h> 85 86 #include <uvm/uvm_extern.h> 87 88 #include <dev/pci/pcivar.h> 89 90 #include "ioapic.h" 91 #include "eisa.h" 92 #include "acpi.h" 93 #include "opt_mpbios.h" 94 #include "opt_acpi.h" 95 96 #if NIOAPIC > 0 || NACPI > 0 97 #include <machine/i82093var.h> 98 #include <machine/mpconfig.h> 99 #include <machine/mpbiosvar.h> 100 #include <machine/pic.h> 101 #endif 102 103 #ifdef MPBIOS 104 #include <machine/mpbiosvar.h> 105 #endif 106 107 #if NACPI > 0 108 #include <machine/mpacpi.h> 109 #endif 110 111 int 112 pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 113 { 114 int pin = pa->pa_intrpin; 115 int line = pa->pa_intrline; 116 #if NIOAPIC > 0 || NACPI > 0 117 int rawpin = pa->pa_rawintrpin; 118 pci_chipset_tag_t pc = pa->pa_pc; 119 int bus, dev, func; 120 #endif 121 122 if (pin == 0) { 123 /* No IRQ used. */ 124 goto bad; 125 } 126 127 *ihp = 0; 128 129 if (pin > PCI_INTERRUPT_PIN_MAX) { 130 printf("pci_intr_map: bad interrupt pin %d\n", pin); 131 goto bad; 132 } 133 134 #if NIOAPIC > 0 || NACPI > 0 135 pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func); 136 if (mp_busses != NULL) { 137 if (intr_find_mpmapping(bus, (dev<<2)|(rawpin-1), ihp) == 0) { 138 if ((*ihp & 0xff) == 0) 139 *ihp |= line; 140 return 0; 141 } 142 /* 143 * No explicit PCI mapping found. This is not fatal, 144 * we'll try the ISA (or possibly EISA) mappings next. 145 */ 146 } 147 #endif 148 149 /* 150 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 151 * `unknown' or `no connection' on a PC. We assume that a device with 152 * `no connection' either doesn't have an interrupt (in which case the 153 * pin number should be 0, and would have been noticed above), or 154 * wasn't configured by the BIOS (in which case we punt, since there's 155 * no real way we can know how the interrupt lines are mapped in the 156 * hardware). 157 * 158 * XXX 159 * Since IRQ 0 is only used by the clock, and we can't actually be sure 160 * that the BIOS did its job, we also recognize that as meaning that 161 * the BIOS has not configured the device. 162 */ 163 if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 164 printf("pci_intr_map: no mapping for pin %c (line=%02x)\n", 165 '@' + pin, line); 166 goto bad; 167 } else { 168 if (line >= NUM_LEGACY_IRQS) { 169 printf("pci_intr_map: bad interrupt line %d\n", line); 170 goto bad; 171 } 172 if (line == 2) { 173 printf("pci_intr_map: changed line 2 to line 9\n"); 174 line = 9; 175 } 176 } 177 #if NIOAPIC > 0 || NACPI > 0 178 if (mp_busses != NULL) { 179 if (intr_find_mpmapping(mp_isa_bus, line, ihp) == 0) { 180 if ((*ihp & 0xff) == 0) 181 *ihp |= line; 182 return 0; 183 } 184 #if NEISA > 0 185 if (intr_find_mpmapping(mp_eisa_bus, line, ihp) == 0) { 186 if ((*ihp & 0xff) == 0) 187 *ihp |= line; 188 return 0; 189 } 190 #endif 191 printf("pci_intr_map: bus %d dev %d func %d pin %d; line %d\n", 192 bus, dev, func, pin, line); 193 printf("pci_intr_map: no MP mapping found\n"); 194 } 195 #endif 196 197 *ihp = line; 198 return 0; 199 200 bad: 201 *ihp = -1; 202 return 1; 203 } 204 205 const char * 206 pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) 207 { 208 return intr_string(ih); 209 } 210 211 212 const struct evcnt * 213 pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 214 { 215 216 /* XXX for now, no evcnt parent reported */ 217 return NULL; 218 } 219 220 void * 221 pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, 222 int level, int (*func)(void *), void *arg) 223 { 224 int pin, irq; 225 struct pic *pic; 226 227 pic = &i8259_pic; 228 pin = irq = ih; 229 230 #if NIOAPIC > 0 231 if (ih & APIC_INT_VIA_APIC) { 232 pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih)); 233 if (pic == NULL) { 234 printf("pci_intr_establish: bad ioapic %d\n", 235 APIC_IRQ_APIC(ih)); 236 return NULL; 237 } 238 pin = APIC_IRQ_PIN(ih); 239 irq = APIC_IRQ_LEGACY_IRQ(ih); 240 if (irq < 0 || irq >= NUM_LEGACY_IRQS) 241 irq = -1; 242 } 243 #endif 244 245 return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg); 246 } 247 248 void 249 pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) 250 { 251 252 intr_disestablish(cookie); 253 } 254