1 /* 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000, BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 39 #include "acpi.h" 40 #include <dev/acpica/acpivar.h> 41 42 #include <sys/pciio.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pci_private.h> 46 47 #include "pcib_if.h" 48 #include "pci_if.h" 49 50 /* Hooks for the ACPI CA debugging infrastructure. */ 51 #define _COMPONENT ACPI_BUS 52 ACPI_MODULE_NAME("PCI") 53 54 struct acpi_pci_devinfo { 55 struct pci_devinfo ap_dinfo; 56 ACPI_HANDLE ap_handle; 57 int ap_flags; 58 }; 59 60 ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods"); 61 62 static int acpi_pci_attach(device_t dev); 63 static int acpi_pci_child_location_str_method(device_t cbdev, 64 device_t child, char *buf, size_t buflen); 65 static int acpi_pci_probe(device_t dev); 66 static int acpi_pci_read_ivar(device_t dev, device_t child, int which, 67 uintptr_t *result); 68 static int acpi_pci_write_ivar(device_t dev, device_t child, int which, 69 uintptr_t value); 70 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, 71 void *context, void **status); 72 static int acpi_pci_set_powerstate_method(device_t dev, device_t child, 73 int state); 74 static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child); 75 76 static device_method_t acpi_pci_methods[] = { 77 /* Device interface */ 78 DEVMETHOD(device_probe, acpi_pci_probe), 79 DEVMETHOD(device_attach, acpi_pci_attach), 80 DEVMETHOD(device_shutdown, bus_generic_shutdown), 81 DEVMETHOD(device_suspend, pci_suspend), 82 DEVMETHOD(device_resume, pci_resume), 83 84 /* Bus interface */ 85 DEVMETHOD(bus_print_child, pci_print_child), 86 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 87 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar), 88 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar), 89 DEVMETHOD(bus_driver_added, pci_driver_added), 90 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 91 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 92 93 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 94 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 95 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 96 DEVMETHOD(bus_delete_resource, pci_delete_resource), 97 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 98 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 99 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 100 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 101 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 102 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method), 103 104 /* PCI interface */ 105 DEVMETHOD(pci_read_config, pci_read_config_method), 106 DEVMETHOD(pci_write_config, pci_write_config_method), 107 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 108 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 109 DEVMETHOD(pci_enable_io, pci_enable_io_method), 110 DEVMETHOD(pci_disable_io, pci_disable_io_method), 111 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 112 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method), 113 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 114 115 { 0, 0 } 116 }; 117 118 static driver_t acpi_pci_driver = { 119 "pci", 120 acpi_pci_methods, 121 0, /* no softc */ 122 }; 123 124 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0); 125 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1); 126 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1); 127 MODULE_VERSION(acpi_pci, 1); 128 129 static int 130 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 131 { 132 struct acpi_pci_devinfo *dinfo; 133 134 dinfo = device_get_ivars(child); 135 switch (which) { 136 case ACPI_IVAR_HANDLE: 137 *result = (uintptr_t)dinfo->ap_handle; 138 return (0); 139 case ACPI_IVAR_FLAGS: 140 *result = (uintptr_t)dinfo->ap_flags; 141 return (0); 142 } 143 return (pci_read_ivar(dev, child, which, result)); 144 } 145 146 static int 147 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 148 { 149 struct acpi_pci_devinfo *dinfo; 150 151 dinfo = device_get_ivars(child); 152 switch (which) { 153 case ACPI_IVAR_HANDLE: 154 dinfo->ap_handle = (ACPI_HANDLE)value; 155 return (0); 156 case ACPI_IVAR_FLAGS: 157 dinfo->ap_flags = (int)value; 158 return (0); 159 } 160 return (pci_write_ivar(dev, child, which, value)); 161 } 162 163 static int 164 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf, 165 size_t buflen) 166 { 167 struct acpi_pci_devinfo *dinfo = device_get_ivars(child); 168 169 pci_child_location_str_method(cbdev, child, buf, buflen); 170 171 if (dinfo->ap_handle) { 172 strlcat(buf, " handle=", buflen); 173 strlcat(buf, acpi_name(dinfo->ap_handle), buflen); 174 } 175 return (0); 176 } 177 178 /* 179 * PCI power manangement 180 */ 181 static int 182 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state) 183 { 184 ACPI_HANDLE h; 185 ACPI_STATUS status; 186 int acpi_state, old_state, error; 187 188 error = 0; 189 switch (state) { 190 case PCI_POWERSTATE_D0: 191 acpi_state = ACPI_STATE_D0; 192 break; 193 case PCI_POWERSTATE_D1: 194 acpi_state = ACPI_STATE_D1; 195 break; 196 case PCI_POWERSTATE_D2: 197 acpi_state = ACPI_STATE_D2; 198 break; 199 case PCI_POWERSTATE_D3: 200 acpi_state = ACPI_STATE_D3; 201 break; 202 default: 203 return (EINVAL); 204 } 205 206 /* 207 * We set the state using PCI Power Management outside of setting 208 * the ACPI state. This means that when powering down a device, we 209 * first shut it down using PCI, and then using ACPI, which lets ACPI 210 * try to power down any Power Resources that are now no longer used. 211 * When powering up a device, we let ACPI set the state first so that 212 * it can enable any needed Power Resources before changing the PCI 213 * power state. 214 */ 215 ACPI_SERIAL_BEGIN(pci_powerstate); 216 old_state = pci_get_powerstate(child); 217 if (old_state < state) { 218 error = pci_set_powerstate_method(dev, child, state); 219 if (error) 220 goto out; 221 } 222 h = acpi_get_handle(child); 223 status = acpi_pwr_switch_consumer(h, acpi_state); 224 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 225 device_printf(dev, 226 "Failed to set ACPI power state D%d on %s: %s\n", 227 acpi_state, acpi_name(h), AcpiFormatException(status)); 228 if (old_state > state) 229 error = pci_set_powerstate_method(dev, child, state); 230 231 out: 232 ACPI_SERIAL_END(pci_powerstate); 233 return (error); 234 } 235 236 static void 237 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child) 238 { 239 ACPI_STATUS status; 240 device_t child; 241 242 /* 243 * Lookup and remove the unused device that acpi0 creates when it walks 244 * the namespace creating devices. 245 */ 246 child = acpi_get_device(handle); 247 if (child != NULL) { 248 KASSERT(!device_is_alive(child), ("%s: deleting alive child %s", 249 __func__, device_get_nameunit(child))); 250 KASSERT(device_get_parent(child) == 251 devclass_get_device(devclass_find("acpi"), 0), 252 ("%s: child (%s)'s parent is not acpi0", __func__, 253 acpi_name(handle))); 254 device_delete_child(device_get_parent(child), child); 255 } 256 257 /* 258 * Update ACPI-CA to use the PCI enumerated device_t for this handle. 259 */ 260 status = AcpiDetachData(handle, acpi_fake_objhandler); 261 if (ACPI_FAILURE(status)) 262 printf("WARNING: Unable to detach object data from %s - %s\n", 263 acpi_name(handle), AcpiFormatException(status)); 264 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child); 265 if (ACPI_FAILURE(status)) 266 printf("WARNING: Unable to attach object data to %s - %s\n", 267 acpi_name(handle), AcpiFormatException(status)); 268 } 269 270 static ACPI_STATUS 271 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, 272 void **status) 273 { 274 struct acpi_pci_devinfo *dinfo; 275 device_t *devlist; 276 int devcount, i, func, slot; 277 UINT32 address; 278 279 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 280 281 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address))) 282 return_ACPI_STATUS (AE_OK); 283 slot = address >> 16; 284 func = address & 0xffff; 285 if (device_get_children((device_t)context, &devlist, &devcount) != 0) 286 return_ACPI_STATUS (AE_OK); 287 for (i = 0; i < devcount; i++) { 288 dinfo = device_get_ivars(devlist[i]); 289 if (dinfo->ap_dinfo.cfg.func == func && 290 dinfo->ap_dinfo.cfg.slot == slot) { 291 dinfo->ap_handle = handle; 292 acpi_pci_update_device(handle, devlist[i]); 293 break; 294 } 295 } 296 free(devlist, M_TEMP); 297 return_ACPI_STATUS (AE_OK); 298 } 299 300 static int 301 acpi_pci_probe(device_t dev) 302 { 303 304 if (pcib_get_bus(dev) < 0) 305 return (ENXIO); 306 if (acpi_get_handle(dev) == NULL) 307 return (ENXIO); 308 device_set_desc(dev, "ACPI PCI bus"); 309 return (0); 310 } 311 312 static int 313 acpi_pci_attach(device_t dev) 314 { 315 int busno; 316 317 /* 318 * Since there can be multiple independantly numbered PCI 319 * busses on some large alpha systems, we can't use the unit 320 * number to decide what bus we are probing. We ask the parent 321 * pcib what our bus number is. 322 */ 323 busno = pcib_get_bus(dev); 324 if (bootverbose) 325 device_printf(dev, "physical bus=%d\n", busno); 326 327 /* 328 * First, PCI devices are added as in the normal PCI bus driver. 329 * Afterwards, the ACPI namespace under the bridge driver is 330 * walked to save ACPI handles to all the devices that appear in 331 * the ACPI namespace as immediate descendants of the bridge. 332 * 333 * XXX: Sometimes PCI devices show up in the ACPI namespace that 334 * pci_add_children() doesn't find. We currently just ignore 335 * these devices. 336 */ 337 pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo)); 338 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1, 339 acpi_pci_save_handle, dev, NULL); 340 341 return (bus_generic_attach(dev)); 342 } 343