FreeBSD/Linux Kernel Cross Reference
sys/x86/x86/mptable_pci.c

     /*-
      * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the author nor the names of any co-contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
     * interrupts from PCI devices to I/O APICs.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcib_private.h>
    #include <machine/legacyvar.h>
    #include <machine/mptable.h>
    #include <machine/pci_cfgreg.h>
    
    #include "pcib_if.h"
    
    /* Host to PCI bridge driver. */
    
    static int
    mptable_hostb_probe(device_t dev)
    {
    
            if (pci_cfgregopen() == 0)
                    return (ENXIO);
            if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
                    return (ENXIO);
            device_set_desc(dev, "MPTable Host-PCI bridge");
            return (0);
    }
    
    static int
    mptable_hostb_attach(device_t dev)
    {
    
            device_add_child(dev, "pci", pcib_get_bus(dev));
            return (bus_generic_attach(dev));
    }
    
    /* Pass MSI requests up to the nexus. */
    static int
    mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
        int *irqs)
    {
            device_t bus;
    
            bus = device_get_parent(pcib);
            return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
                irqs));
    }
    
    static int
    mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
    {
            device_t bus;
    
            bus = device_get_parent(pcib);
            return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
    }
    
    static device_method_t mptable_hostb_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         mptable_hostb_probe),
           DEVMETHOD(device_attach,        mptable_hostb_attach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           DEVMETHOD(device_suspend,       bus_generic_suspend),
           DEVMETHOD(device_resume,        bus_generic_resume),
   
           /* Bus interface */
           DEVMETHOD(bus_read_ivar,        legacy_pcib_read_ivar),
           DEVMETHOD(bus_write_ivar,       legacy_pcib_write_ivar),
           DEVMETHOD(bus_alloc_resource,   legacy_pcib_alloc_resource),
           DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
           DEVMETHOD(bus_release_resource, bus_generic_release_resource),
           DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
           DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
           DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
           DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   
           /* pcib interface */
           DEVMETHOD(pcib_maxslots,        legacy_pcib_maxslots),
           DEVMETHOD(pcib_read_config,     legacy_pcib_read_config),
           DEVMETHOD(pcib_write_config,    legacy_pcib_write_config),
           DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
           DEVMETHOD(pcib_alloc_msi,       mptable_hostb_alloc_msi),
           DEVMETHOD(pcib_release_msi,     pcib_release_msi),
           DEVMETHOD(pcib_alloc_msix,      mptable_hostb_alloc_msix),
           DEVMETHOD(pcib_release_msix,    pcib_release_msix),
           DEVMETHOD(pcib_map_msi,         legacy_pcib_map_msi),
   
           DEVMETHOD_END
   };
   
   static devclass_t hostb_devclass;
   
   DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1);
   DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
   
   /* PCI to PCI bridge driver. */
   
   static int
   mptable_pcib_probe(device_t dev)
   {
           int bus;
   
           if ((pci_get_class(dev) != PCIC_BRIDGE) ||
               (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
                   return (ENXIO);
           bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
           if (bus == 0)
                   return (ENXIO);
           if (mptable_pci_probe_table(bus) != 0)
                   return (ENXIO);
           device_set_desc(dev, "MPTable PCI-PCI bridge");
           return (-1000);
   }
   
   static device_method_t mptable_pcib_pci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,         mptable_pcib_probe),
           DEVMETHOD(device_attach,        pcib_attach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           DEVMETHOD(device_suspend,       bus_generic_suspend),
           DEVMETHOD(device_resume,        bus_generic_resume),
   
           /* Bus interface */
           DEVMETHOD(bus_print_child,      bus_generic_print_child),
           DEVMETHOD(bus_read_ivar,        pcib_read_ivar),
           DEVMETHOD(bus_write_ivar,       pcib_write_ivar),
           DEVMETHOD(bus_alloc_resource,   pcib_alloc_resource),
           DEVMETHOD(bus_release_resource, bus_generic_release_resource),
           DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
           DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
           DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
           DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   
           /* pcib interface */
           DEVMETHOD(pcib_maxslots,        pcib_maxslots),
           DEVMETHOD(pcib_read_config,     pcib_read_config),
           DEVMETHOD(pcib_write_config,    pcib_write_config),
           DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
           DEVMETHOD(pcib_alloc_msi,       pcib_alloc_msi),
           DEVMETHOD(pcib_release_msi,     pcib_release_msi),
           DEVMETHOD(pcib_alloc_msix,      pcib_alloc_msix),
           DEVMETHOD(pcib_release_msix,    pcib_release_msix),
           DEVMETHOD(pcib_map_msi,         pcib_map_msi),
   
           {0, 0}
   };
   
   static devclass_t pcib_devclass;
   
   DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
       sizeof(struct pcib_softc));
   DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);

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