1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include "opt_acpi.h" 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/malloc.h> 33 #include <sys/kernel.h> 34 35 #include <contrib/dev/acpica/include/acpi.h> 36 #include <contrib/dev/acpica/include/accommon.h> 37 38 #include <dev/acpica/acpivar.h> 39 #include <dev/acpica/acpi_pcibvar.h> 40 41 #include <dev/pci/pcivar.h> 42 #include "pcib_if.h" 43 44 /* Hooks for the ACPI CA debugging infrastructure. */ 45 #define _COMPONENT ACPI_BUS 46 ACPI_MODULE_NAME("PCI") 47 48 ACPI_SERIAL_DECL(pcib, "ACPI PCI bus methods"); 49 50 /* 51 * For locking, we assume the caller is not concurrent since this is 52 * triggered by newbus methods. 53 */ 54 55 struct prt_lookup_request { 56 ACPI_PCI_ROUTING_TABLE *pr_entry; 57 u_int pr_pin; 58 u_int pr_slot; 59 }; 60 61 typedef void prt_entry_handler(ACPI_PCI_ROUTING_TABLE *entry, void *arg); 62 63 static void prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg); 64 static void prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg); 65 static void prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler, 66 void *arg); 67 68 static void 69 prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler, void *arg) 70 { 71 ACPI_PCI_ROUTING_TABLE *entry; 72 char *prtptr; 73 74 /* First check to see if there is a table to walk. */ 75 if (prt == NULL || prt->Pointer == NULL) 76 return; 77 78 /* Walk the table executing the handler function for each entry. */ 79 prtptr = prt->Pointer; 80 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr; 81 while (entry->Length != 0) { 82 handler(entry, arg); 83 prtptr += entry->Length; 84 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr; 85 } 86 } 87 88 static void 89 prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg) 90 { 91 ACPI_HANDLE handle; 92 device_t child, pcib; 93 int error; 94 95 /* We only care about entries that reference a link device. */ 96 if (entry->Source[0] == '\0') 97 return; 98 99 /* 100 * In practice, we only see SourceIndex's of 0 out in the wild. 101 * When indices != 0 have been found, they've been bugs in the ASL. 102 */ 103 if (entry->SourceIndex != 0) 104 return; 105 106 /* Lookup the associated handle and device. */ 107 pcib = (device_t)arg; 108 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, entry->Source, &handle))) 109 return; 110 child = acpi_get_device(handle); 111 if (child == NULL) 112 return; 113 114 /* If the device hasn't been probed yet, force it to do so. */ 115 error = device_probe_and_attach(child); 116 if (error != 0) { 117 device_printf(pcib, "failed to force attach of %s\n", 118 acpi_name(handle)); 119 return; 120 } 121 122 /* Add a reference for a specific bus/device/pin tuple. */ 123 acpi_pci_link_add_reference(child, entry->SourceIndex, pcib, 124 ACPI_ADR_PCI_SLOT(entry->Address), entry->Pin); 125 } 126 127 void 128 acpi_pcib_fetch_prt(device_t dev, ACPI_BUFFER *prt) 129 { 130 ACPI_STATUS status; 131 132 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 133 134 /* 135 * Get the PCI interrupt routing table for this bus. If we can't 136 * get it, this is not an error but may reduce functionality. There 137 * are several valid bridges in the field that do not have a _PRT, so 138 * only warn about missing tables if bootverbose is set. 139 */ 140 prt->Length = ACPI_ALLOCATE_BUFFER; 141 status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt); 142 if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND)) 143 device_printf(dev, 144 "could not get PCI interrupt routing table for %s - %s\n", 145 acpi_name(acpi_get_handle(dev)), AcpiFormatException(status)); 146 147 /* 148 * Ensure all the link devices are attached. 149 */ 150 prt_walk_table(prt, prt_attach_devices, dev); 151 } 152 153 static void 154 prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg) 155 { 156 struct prt_lookup_request *pr; 157 158 pr = (struct prt_lookup_request *)arg; 159 if (pr->pr_entry != NULL) 160 return; 161 162 /* 163 * Compare the slot number (high word of Address) and pin number 164 * (note that ACPI uses 0 for INTA) to check for a match. 165 * 166 * Note that the low word of the Address field (function number) 167 * is required by the specification to be 0xffff. We don't risk 168 * checking it here. 169 */ 170 if (ACPI_ADR_PCI_SLOT(entry->Address) == pr->pr_slot && 171 entry->Pin == pr->pr_pin) 172 pr->pr_entry = entry; 173 } 174 175 /* 176 * Route an interrupt for a child of the bridge. 177 */ 178 int 179 acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin, 180 ACPI_BUFFER *prtbuf) 181 { 182 ACPI_PCI_ROUTING_TABLE *prt; 183 struct prt_lookup_request pr; 184 ACPI_HANDLE lnkdev; 185 int interrupt; 186 187 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 188 189 lnkdev = NULL; 190 interrupt = PCI_INVALID_IRQ; 191 192 /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */ 193 pin--; 194 195 ACPI_SERIAL_BEGIN(pcib); 196 197 /* Search for a matching entry in the routing table. */ 198 pr.pr_entry = NULL; 199 pr.pr_pin = pin; 200 pr.pr_slot = pci_get_slot(dev); 201 prt_walk_table(prtbuf, prt_lookup_device, &pr); 202 if (pr.pr_entry == NULL) { 203 device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev), 204 pci_get_slot(dev), 'A' + pin); 205 goto out; 206 } 207 prt = pr.pr_entry; 208 209 if (bootverbose) { 210 device_printf(pcib, "matched entry for %d.%d.INT%c", 211 pci_get_bus(dev), pci_get_slot(dev), 'A' + pin); 212 if (prt->Source[0] != '\0') 213 printf(" (src %s:%u)", prt->Source, prt->SourceIndex); 214 printf("\n"); 215 } 216 217 /* 218 * If source is empty/NULL, the source index is a global IRQ number 219 * and it's hard-wired so we're done. 220 * 221 * XXX: If the source index is non-zero, ignore the source device and 222 * assume that this is a hard-wired entry. 223 */ 224 if (prt->Source[0] == '\0' || prt->SourceIndex != 0) { 225 if (bootverbose) 226 device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n", 227 pci_get_slot(dev), 'A' + pin, prt->SourceIndex); 228 if (prt->SourceIndex) { 229 interrupt = prt->SourceIndex; 230 BUS_CONFIG_INTR(dev, interrupt, INTR_TRIGGER_LEVEL, 231 INTR_POLARITY_LOW); 232 } else 233 device_printf(pcib, "error: invalid hard-wired IRQ of 0\n"); 234 goto out; 235 } 236 237 /* 238 * We have to find the source device (PCI interrupt link device). 239 */ 240 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) { 241 device_printf(pcib, "couldn't find PCI interrupt link device %s\n", 242 prt->Source); 243 goto out; 244 } 245 interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev), 246 prt->SourceIndex); 247 248 if (bootverbose && PCI_INTERRUPT_VALID(interrupt)) 249 device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n", 250 pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev)); 251 252 out: 253 ACPI_SERIAL_END(pcib); 254 #ifdef INTRNG 255 if (PCI_INTERRUPT_VALID(interrupt)) { 256 interrupt = acpi_map_intr(dev, interrupt, lnkdev); 257 KASSERT(PCI_INTERRUPT_VALID(interrupt), ("mapping fail")); 258 } 259 #endif 260 return_VALUE(interrupt); 261 } 262 263 int 264 acpi_pcib_power_for_sleep(device_t pcib, device_t dev, int *pstate) 265 { 266 device_t acpi_dev; 267 268 acpi_dev = devclass_get_device(devclass_find("acpi"), 0); 269 acpi_device_pwr_for_sleep(acpi_dev, dev, pstate); 270 return (0); 271 } 272 273 int 274 acpi_pcib_get_cpus(device_t pcib, device_t dev, enum cpu_sets op, 275 size_t setsize, cpuset_t *cpuset) 276 { 277 278 return (bus_get_cpus(pcib, op, setsize, cpuset)); 279 } 280