1 /* $NetBSD: pci_intr_machdep.c,v 1.7 2008/01/04 18:38:31 ad 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 1.7 2008/01/04 18:38:31 ad 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/intr.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <dev/pci/pcivar.h> 96 97 #include "ioapic.h" 98 #include "eisa.h" 99 #include "acpi.h" 100 #include "opt_mpbios.h" 101 #include "opt_acpi.h" 102 103 #if NIOAPIC > 0 || NACPI > 0 104 #include <machine/i82093var.h> 105 #include <machine/mpconfig.h> 106 #include <machine/mpbiosvar.h> 107 #include <machine/pic.h> 108 #endif 109 110 #ifdef MPBIOS 111 #include <machine/mpbiosvar.h> 112 #endif 113 114 #if NACPI > 0 115 #include <machine/mpacpi.h> 116 #endif 117 118 int 119 pci_intr_map(pa, ihp) 120 struct pci_attach_args *pa; 121 pci_intr_handle_t *ihp; 122 { 123 int pin = pa->pa_intrpin; 124 int line = pa->pa_intrline; 125 #if NIOAPIC > 0 || NACPI > 0 126 int rawpin = pa->pa_rawintrpin; 127 pci_chipset_tag_t pc = pa->pa_pc; 128 int bus, dev, func; 129 #endif 130 131 if (pin == 0) { 132 /* No IRQ used. */ 133 goto bad; 134 } 135 136 *ihp = 0; 137 138 if (pin > PCI_INTERRUPT_PIN_MAX) { 139 printf("pci_intr_map: bad interrupt pin %d\n", pin); 140 goto bad; 141 } 142 143 #if NIOAPIC > 0 || NACPI > 0 144 pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func); 145 if (mp_busses != NULL) { 146 if (intr_find_mpmapping(bus, (dev<<2)|(rawpin-1), ihp) == 0) { 147 if ((*ihp & 0xff) == 0) 148 *ihp |= line; 149 return 0; 150 } 151 /* 152 * No explicit PCI mapping found. This is not fatal, 153 * we'll try the ISA (or possibly EISA) mappings next. 154 */ 155 } 156 #endif 157 158 /* 159 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 160 * `unknown' or `no connection' on a PC. We assume that a device with 161 * `no connection' either doesn't have an interrupt (in which case the 162 * pin number should be 0, and would have been noticed above), or 163 * wasn't configured by the BIOS (in which case we punt, since there's 164 * no real way we can know how the interrupt lines are mapped in the 165 * hardware). 166 * 167 * XXX 168 * Since IRQ 0 is only used by the clock, and we can't actually be sure 169 * that the BIOS did its job, we also recognize that as meaning that 170 * the BIOS has not configured the device. 171 */ 172 if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 173 printf("pci_intr_map: no mapping for pin %c (line=%02x)\n", 174 '@' + pin, line); 175 goto bad; 176 } else { 177 if (line >= NUM_LEGACY_IRQS) { 178 printf("pci_intr_map: bad interrupt line %d\n", line); 179 goto bad; 180 } 181 if (line == 2) { 182 printf("pci_intr_map: changed line 2 to line 9\n"); 183 line = 9; 184 } 185 } 186 #if NIOAPIC > 0 || NACPI > 0 187 if (mp_busses != NULL) { 188 if (intr_find_mpmapping(mp_isa_bus, line, ihp) == 0) { 189 if ((*ihp & 0xff) == 0) 190 *ihp |= line; 191 return 0; 192 } 193 #if NEISA > 0 194 if (intr_find_mpmapping(mp_eisa_bus, line, ihp) == 0) { 195 if ((*ihp & 0xff) == 0) 196 *ihp |= line; 197 return 0; 198 } 199 #endif 200 printf("pci_intr_map: bus %d dev %d func %d pin %d; line %d\n", 201 bus, dev, func, pin, line); 202 printf("pci_intr_map: no MP mapping found\n"); 203 } 204 #endif 205 206 *ihp = line; 207 return 0; 208 209 bad: 210 *ihp = -1; 211 return 1; 212 } 213 214 const char * 215 pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) 216 { 217 return intr_string(ih); 218 } 219 220 221 const struct evcnt * 222 pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 223 { 224 225 /* XXX for now, no evcnt parent reported */ 226 return NULL; 227 } 228 229 void * 230 pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, 231 int level, int (*func)(void *), void *arg) 232 { 233 int pin, irq; 234 struct pic *pic; 235 236 pic = &i8259_pic; 237 pin = irq = ih; 238 239 #if NIOAPIC > 0 240 if (ih & APIC_INT_VIA_APIC) { 241 pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih)); 242 if (pic == NULL) { 243 printf("pci_intr_establish: bad ioapic %d\n", 244 APIC_IRQ_APIC(ih)); 245 return NULL; 246 } 247 pin = APIC_IRQ_PIN(ih); 248 irq = APIC_IRQ_LEGACY_IRQ(ih); 249 if (irq < 0 || irq >= NUM_LEGACY_IRQS) 250 irq = -1; 251 } 252 #endif 253 254 return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg); 255 } 256 257 void 258 pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) 259 { 260 261 intr_disestablish(cookie); 262 } 263