1 /* $NetBSD: pci_intr_machdep.c,v 1.6 2006/11/16 01:32:39 christos 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 42 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Charles M. Hannum. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* 71 * Machine-specific functions for PCI autoconfiguration. 72 * 73 * On PCs, there are two methods of generating PCI configuration cycles. 74 * We try to detect the appropriate mechanism for this machine and set 75 * up a few function pointers to access the correct method directly. 76 * 77 * The configuration method can be hard-coded in the config file by 78 * using `options PCI_CONF_MODE=N', where `N' is the configuration mode 79 * as defined section 3.6.4.1, `Generating Configuration Cycles'. 80 */ 81 82 #include <sys/cdefs.h> 83 __KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.6 2006/11/16 01:32:39 christos Exp $"); 84 85 #include <sys/types.h> 86 #include <sys/param.h> 87 #include <sys/time.h> 88 #include <sys/systm.h> 89 #include <sys/errno.h> 90 #include <sys/device.h> 91 #include <sys/lock.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <machine/intr.h> 96 97 #include <dev/pci/pcivar.h> 98 99 #include "ioapic.h" 100 #include "eisa.h" 101 #include "acpi.h" 102 #include "opt_mpbios.h" 103 #include "opt_acpi.h" 104 105 #if NIOAPIC > 0 || NACPI > 0 106 #include <machine/i82093var.h> 107 #include <machine/mpconfig.h> 108 #include <machine/mpbiosvar.h> 109 #include <machine/pic.h> 110 #endif 111 112 #ifdef MPBIOS 113 #include <machine/mpbiosvar.h> 114 #endif 115 116 #if NACPI > 0 117 #include <machine/mpacpi.h> 118 #endif 119 120 int 121 pci_intr_map(pa, ihp) 122 struct pci_attach_args *pa; 123 pci_intr_handle_t *ihp; 124 { 125 int pin = pa->pa_intrpin; 126 int line = pa->pa_intrline; 127 #if NIOAPIC > 0 || NACPI > 0 128 int rawpin = pa->pa_rawintrpin; 129 pci_chipset_tag_t pc = pa->pa_pc; 130 int bus, dev, func; 131 #endif 132 133 if (pin == 0) { 134 /* No IRQ used. */ 135 goto bad; 136 } 137 138 *ihp = 0; 139 140 if (pin > PCI_INTERRUPT_PIN_MAX) { 141 printf("pci_intr_map: bad interrupt pin %d\n", pin); 142 goto bad; 143 } 144 145 #if NIOAPIC > 0 || NACPI > 0 146 pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func); 147 if (mp_busses != NULL) { 148 if (intr_find_mpmapping(bus, (dev<<2)|(rawpin-1), ihp) == 0) { 149 if ((*ihp & 0xff) == 0) 150 *ihp |= line; 151 return 0; 152 } 153 /* 154 * No explicit PCI mapping found. This is not fatal, 155 * we'll try the ISA (or possibly EISA) mappings next. 156 */ 157 } 158 #endif 159 160 /* 161 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 162 * `unknown' or `no connection' on a PC. We assume that a device with 163 * `no connection' either doesn't have an interrupt (in which case the 164 * pin number should be 0, and would have been noticed above), or 165 * wasn't configured by the BIOS (in which case we punt, since there's 166 * no real way we can know how the interrupt lines are mapped in the 167 * hardware). 168 * 169 * XXX 170 * Since IRQ 0 is only used by the clock, and we can't actually be sure 171 * that the BIOS did its job, we also recognize that as meaning that 172 * the BIOS has not configured the device. 173 */ 174 if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 175 printf("pci_intr_map: no mapping for pin %c (line=%02x)\n", 176 '@' + pin, line); 177 goto bad; 178 } else { 179 if (line >= NUM_LEGACY_IRQS) { 180 printf("pci_intr_map: bad interrupt line %d\n", line); 181 goto bad; 182 } 183 if (line == 2) { 184 printf("pci_intr_map: changed line 2 to line 9\n"); 185 line = 9; 186 } 187 } 188 #if NIOAPIC > 0 || NACPI > 0 189 if (mp_busses != NULL) { 190 if (intr_find_mpmapping(mp_isa_bus, line, ihp) == 0) { 191 if ((*ihp & 0xff) == 0) 192 *ihp |= line; 193 return 0; 194 } 195 #if NEISA > 0 196 if (intr_find_mpmapping(mp_eisa_bus, line, ihp) == 0) { 197 if ((*ihp & 0xff) == 0) 198 *ihp |= line; 199 return 0; 200 } 201 #endif 202 printf("pci_intr_map: bus %d dev %d func %d pin %d; line %d\n", 203 bus, dev, func, pin, line); 204 printf("pci_intr_map: no MP mapping found\n"); 205 } 206 #endif 207 208 *ihp = line; 209 return 0; 210 211 bad: 212 *ihp = -1; 213 return 1; 214 } 215 216 const char * 217 pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) 218 { 219 return intr_string(ih); 220 } 221 222 223 const struct evcnt * 224 pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 225 { 226 227 /* XXX for now, no evcnt parent reported */ 228 return NULL; 229 } 230 231 void * 232 pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, 233 int level, int (*func)(void *), void *arg) 234 { 235 int pin, irq; 236 struct pic *pic; 237 238 pic = &i8259_pic; 239 pin = irq = ih; 240 241 #if NIOAPIC > 0 242 if (ih & APIC_INT_VIA_APIC) { 243 pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih)); 244 if (pic == NULL) { 245 printf("pci_intr_establish: bad ioapic %d\n", 246 APIC_IRQ_APIC(ih)); 247 return NULL; 248 } 249 pin = APIC_IRQ_PIN(ih); 250 irq = APIC_IRQ_LEGACY_IRQ(ih); 251 if (irq < 0 || irq >= NUM_LEGACY_IRQS) 252 irq = -1; 253 } 254 #endif 255 256 return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg); 257 } 258 259 void 260 pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) 261 { 262 263 intr_disestablish(cookie); 264 } 265