The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_pci.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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: releng/7.3/sys/dev/acpica/acpi_pci.c 173226 2007-10-31 16:10:12Z jhb $");
   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 <contrib/dev/acpica/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 /* Be sure that ACPI and PCI power states are equivalent. */
   63 CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
   64 CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
   65 CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
   66 CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
   67 
   68 static int      acpi_pci_attach(device_t dev);
   69 static int      acpi_pci_child_location_str_method(device_t cbdev,
   70                     device_t child, char *buf, size_t buflen);
   71 static int      acpi_pci_probe(device_t dev);
   72 static int      acpi_pci_read_ivar(device_t dev, device_t child, int which,
   73                     uintptr_t *result);
   74 static int      acpi_pci_write_ivar(device_t dev, device_t child, int which,
   75                     uintptr_t value);
   76 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
   77                     void *context, void **status);
   78 static int      acpi_pci_set_powerstate_method(device_t dev, device_t child,
   79                     int state);
   80 static void     acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
   81 
   82 static device_method_t acpi_pci_methods[] = {
   83         /* Device interface */
   84         DEVMETHOD(device_probe,         acpi_pci_probe),
   85         DEVMETHOD(device_attach,        acpi_pci_attach),
   86 
   87         /* Bus interface */
   88         DEVMETHOD(bus_read_ivar,        acpi_pci_read_ivar),
   89         DEVMETHOD(bus_write_ivar,       acpi_pci_write_ivar),
   90         DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
   91 
   92         /* PCI interface */
   93         DEVMETHOD(pci_set_powerstate,   acpi_pci_set_powerstate_method),
   94 
   95         { 0, 0 }
   96 };
   97 
   98 static devclass_t pci_devclass;
   99 
  100 DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, 0, pci_driver);
  101 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
  102 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
  103 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
  104 MODULE_VERSION(acpi_pci, 1);
  105 
  106 static int
  107 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  108 {
  109     struct acpi_pci_devinfo *dinfo;
  110 
  111     dinfo = device_get_ivars(child);
  112     switch (which) {
  113     case ACPI_IVAR_HANDLE:
  114         *result = (uintptr_t)dinfo->ap_handle;
  115         return (0);
  116     case ACPI_IVAR_FLAGS:
  117         *result = (uintptr_t)dinfo->ap_flags;
  118         return (0);
  119     }
  120     return (pci_read_ivar(dev, child, which, result));
  121 }
  122 
  123 static int
  124 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  125 {
  126     struct acpi_pci_devinfo *dinfo;
  127 
  128     dinfo = device_get_ivars(child);
  129     switch (which) {
  130     case ACPI_IVAR_HANDLE:
  131         dinfo->ap_handle = (ACPI_HANDLE)value;
  132         return (0);
  133     case ACPI_IVAR_FLAGS:
  134         dinfo->ap_flags = (int)value;
  135         return (0);
  136     }
  137     return (pci_write_ivar(dev, child, which, value));
  138 }
  139 
  140 static int
  141 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
  142     size_t buflen)
  143 {
  144     struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
  145 
  146     pci_child_location_str_method(cbdev, child, buf, buflen);
  147     
  148     if (dinfo->ap_handle) {
  149         strlcat(buf, " handle=", buflen);
  150         strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
  151     }
  152     return (0);
  153 }
  154 
  155 /*
  156  * PCI power manangement
  157  */
  158 static int
  159 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
  160 {
  161         ACPI_HANDLE h;
  162         ACPI_STATUS status;
  163         int old_state, error;
  164 
  165         error = 0;
  166         if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
  167                 return (EINVAL);
  168 
  169         /*
  170          * We set the state using PCI Power Management outside of setting
  171          * the ACPI state.  This means that when powering down a device, we
  172          * first shut it down using PCI, and then using ACPI, which lets ACPI
  173          * try to power down any Power Resources that are now no longer used.
  174          * When powering up a device, we let ACPI set the state first so that
  175          * it can enable any needed Power Resources before changing the PCI
  176          * power state.
  177          */
  178         ACPI_SERIAL_BEGIN(pci_powerstate);
  179         old_state = pci_get_powerstate(child);
  180         if (old_state < state) {
  181                 error = pci_set_powerstate_method(dev, child, state);
  182                 if (error)
  183                         goto out;
  184         }
  185         h = acpi_get_handle(child);
  186         status = acpi_pwr_switch_consumer(h, state);
  187         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
  188                 device_printf(dev,
  189                     "Failed to set ACPI power state D%d on %s: %s\n",
  190                     state, acpi_name(h), AcpiFormatException(status));
  191         if (old_state > state)
  192                 error = pci_set_powerstate_method(dev, child, state);
  193 
  194 out:
  195         ACPI_SERIAL_END(pci_powerstate);
  196         return (error);
  197 }
  198 
  199 static void
  200 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
  201 {
  202         ACPI_STATUS status;
  203         device_t child;
  204 
  205         /*
  206          * Lookup and remove the unused device that acpi0 creates when it walks
  207          * the namespace creating devices.
  208          */
  209         child = acpi_get_device(handle);
  210         if (child != NULL) {
  211                 if (device_is_alive(child)) {
  212                         /*
  213                          * The TabletPC TC1000 has a second PCI-ISA bridge
  214                          * that has a _HID for an acpi_sysresource device.
  215                          * In that case, leave ACPI-CA's device data pointing
  216                          * at the ACPI-enumerated device.
  217                          */
  218                         device_printf(child,
  219                             "Conflicts with PCI device %d:%d:%d\n",
  220                             pci_get_bus(pci_child), pci_get_slot(pci_child),
  221                             pci_get_function(pci_child));
  222                         return;
  223                 }
  224                 KASSERT(device_get_parent(child) ==
  225                     devclass_get_device(devclass_find("acpi"), 0),
  226                     ("%s: child (%s)'s parent is not acpi0", __func__,
  227                     acpi_name(handle)));
  228                 device_delete_child(device_get_parent(child), child);
  229         }
  230 
  231         /*
  232          * Update ACPI-CA to use the PCI enumerated device_t for this handle.
  233          */
  234         status = AcpiDetachData(handle, acpi_fake_objhandler);
  235         if (ACPI_FAILURE(status))
  236                 printf("WARNING: Unable to detach object data from %s - %s\n",
  237                     acpi_name(handle), AcpiFormatException(status));
  238         status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
  239         if (ACPI_FAILURE(status))
  240                 printf("WARNING: Unable to attach object data to %s - %s\n",
  241                     acpi_name(handle), AcpiFormatException(status));
  242 }
  243 
  244 static ACPI_STATUS
  245 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
  246     void **status)
  247 {
  248         struct acpi_pci_devinfo *dinfo;
  249         device_t *devlist;
  250         int devcount, i, func, slot;
  251         UINT32 address;
  252 
  253         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  254 
  255         if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
  256                 return_ACPI_STATUS (AE_OK);
  257         slot = ACPI_ADR_PCI_SLOT(address);
  258         func = ACPI_ADR_PCI_FUNC(address);
  259         if (device_get_children((device_t)context, &devlist, &devcount) != 0)
  260                 return_ACPI_STATUS (AE_OK);
  261         for (i = 0; i < devcount; i++) {
  262                 dinfo = device_get_ivars(devlist[i]);
  263                 if (dinfo->ap_dinfo.cfg.func == func &&
  264                     dinfo->ap_dinfo.cfg.slot == slot) {
  265                         dinfo->ap_handle = handle;
  266                         acpi_pci_update_device(handle, devlist[i]);
  267                         break;
  268                 }
  269         }
  270         free(devlist, M_TEMP);
  271         return_ACPI_STATUS (AE_OK);
  272 }
  273 
  274 static int
  275 acpi_pci_probe(device_t dev)
  276 {
  277 
  278         if (pcib_get_bus(dev) < 0)
  279                 return (ENXIO);
  280         if (acpi_get_handle(dev) == NULL)
  281                 return (ENXIO);
  282         device_set_desc(dev, "ACPI PCI bus");
  283         return (0);
  284 }
  285 
  286 static int
  287 acpi_pci_attach(device_t dev)
  288 {
  289         int busno, domain;
  290 
  291         /*
  292          * Since there can be multiple independantly numbered PCI
  293          * busses on systems with multiple PCI domains, we can't use
  294          * the unit number to decide which bus we are probing. We ask
  295          * the parent pcib what our domain and bus numbers are.
  296          */
  297         domain = pcib_get_domain(dev);
  298         busno = pcib_get_bus(dev);
  299         if (bootverbose)
  300                 device_printf(dev, "domain=%d, physical bus=%d\n",
  301                     domain, busno);
  302 
  303         /*
  304          * First, PCI devices are added as in the normal PCI bus driver.
  305          * Afterwards, the ACPI namespace under the bridge driver is
  306          * walked to save ACPI handles to all the devices that appear in
  307          * the ACPI namespace as immediate descendants of the bridge.
  308          *
  309          * XXX: Sometimes PCI devices show up in the ACPI namespace that
  310          * pci_add_children() doesn't find.  We currently just ignore
  311          * these devices.
  312          */
  313         pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
  314         AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
  315             acpi_pci_save_handle, dev, NULL);
  316 
  317         return (bus_generic_attach(dev));
  318 }

Cache object: a2d5cadea7f96de196385ca7c142c5c2


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.