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


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

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    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 __FBSDID("$FreeBSD: releng/5.3/sys/dev/acpica/acpi_pcib.c 133621 2004-08-13 06:22:07Z njl $");
   30 
   31 #include "opt_acpi.h"
   32 #include <sys/param.h>
   33 #include <sys/bus.h>
   34 #include <sys/malloc.h>
   35 #include <sys/kernel.h>
   36 
   37 #include "acpi.h"
   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 int
   55 acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
   56 {
   57     device_t                    child;
   58     ACPI_STATUS                 status;
   59 
   60     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   61 
   62     /*
   63      * Don't attach if we're not really there.
   64      *
   65      * XXX: This isn't entirely correct since we may be a PCI bus
   66      * on a hot-plug docking station, etc.
   67      */
   68     if (!acpi_DeviceIsPresent(dev))
   69         return_VALUE(ENXIO);
   70 
   71     /*
   72      * Get the PCI interrupt routing table for this bus.  If we can't
   73      * get it, this is not an error but may reduce functionality.
   74      */
   75     prt->Length = ACPI_ALLOCATE_BUFFER;
   76     status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
   77     if (ACPI_FAILURE(status))
   78         device_printf(dev,
   79             "could not get PCI interrupt routing table for %s - %s\n",
   80             acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
   81 
   82     /*
   83      * Attach the PCI bus proper.
   84      */
   85     if ((child = device_add_child(dev, "pci", busno)) == NULL) {
   86         device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
   87         return_VALUE(ENXIO);
   88     }
   89 
   90     /*
   91      * Now go scan the bus.
   92      */
   93     acpi_pci_link_config(dev, prt, busno);
   94 
   95     return_VALUE (bus_generic_attach(dev));
   96 }
   97 
   98 int
   99 acpi_pcib_resume(device_t dev)
  100 {
  101     acpi_pci_link_resume(dev);
  102     return (bus_generic_resume(dev));
  103 }
  104 
  105 /*
  106  * Route an interrupt for a child of the bridge.
  107  */
  108 int
  109 acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
  110 {
  111     struct acpi_prt_entry       *entry;
  112     int                         i, interrupt;
  113     struct acpi_pci_link_entry  *link;
  114     ACPI_PCI_ROUTING_TABLE      *prt;
  115 
  116     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  117 
  118     interrupt = PCI_INVALID_IRQ;
  119 
  120     /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
  121     pin--;
  122 
  123     ACPI_SERIAL_BEGIN(pcib);
  124 
  125     /* Look up the PRT entry for this device. */
  126     entry = acpi_pci_find_prt(pcib, dev, pin);
  127     if (entry == NULL) {
  128         device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev),
  129             pci_get_slot(dev), 'A' + pin);
  130         goto out;
  131     }
  132     prt = &entry->prt;
  133     link = entry->pci_link;
  134     if (bootverbose) {
  135         device_printf(pcib, "matched entry for %d.%d.INT%c",
  136             pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
  137         if (prt->Source[0] != '\0')
  138             printf(" (src %s)", acpi_name(entry->prt_source));
  139         printf("\n");
  140     }
  141 
  142     /*
  143      * If source is empty/NULL, the source index is a global IRQ number
  144      * and it's hard-wired so we're done.
  145      */
  146     if (prt->Source == NULL || prt->Source[0] == '\0') {
  147         if (bootverbose)
  148             device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
  149                 pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
  150         if (prt->SourceIndex)
  151             interrupt = prt->SourceIndex;
  152         else
  153             device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
  154         goto out;
  155     }
  156 
  157     /* XXX Support for multiple resources must be added to the link code. */
  158     if (prt->SourceIndex) {
  159         device_printf(pcib, "src index %d not yet supported\n",
  160             prt->SourceIndex);
  161         goto out;
  162     }
  163 
  164     /* There has to be at least one interrupt available. */
  165     if (link->number_of_interrupts == 0) {
  166         device_printf(pcib, "device has no interrupts\n");
  167         goto out;
  168     }
  169 
  170     /* 
  171      * If the current interrupt has been routed, we're done.  This is the
  172      * case when the BIOS initializes it and we didn't disable it.
  173      */
  174     if (link->flags & ACPI_LINK_ROUTED) {
  175         interrupt = link->current_irq;
  176         if (bootverbose)
  177             device_printf(pcib, "slot %d INT%c is already routed to irq %d\n",
  178                 pci_get_slot(dev), 'A' + pin, interrupt);
  179         goto out;
  180     }
  181 
  182     if (bootverbose) {
  183         device_printf(pcib, "possible interrupts:");
  184         for (i = 0; i < link->number_of_interrupts; i++)
  185             printf("%3d", link->interrupts[i]);
  186         printf("\n");
  187     }
  188 
  189     /*
  190      * Perform the link routing.  The link code will pick the best IRQ
  191      * for this pin and configure it.
  192      */
  193     interrupt = acpi_pci_link_route(dev, entry);
  194 
  195     if (bootverbose && PCI_INTERRUPT_VALID(interrupt))
  196         device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
  197             pci_get_slot(dev), 'A' + pin, interrupt,
  198             acpi_name(entry->prt_source));
  199 
  200 out:
  201     ACPI_SERIAL_END(pcib);
  202 
  203     return_VALUE (interrupt);
  204 }

Cache object: 008a4405f5ae038fba8d5475f0f98fc9


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