mptable_pci.c

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    1 /*-
    2  * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
   29  * interrupts from PCI devices to I/O APICs.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/rman.h>
   41 
   42 #include <dev/pci/pcireg.h>
   43 #include <dev/pci/pcivar.h>
   44 #include <dev/pci/pcib_private.h>
   45 #include <x86/mptable.h>
   46 #include <machine/legacyvar.h>
   47 #include <machine/pci_cfgreg.h>
   48 
   49 #include "pcib_if.h"
   50 
   51 /* Host to PCI bridge driver. */
   52 
   53 static int
   54 mptable_hostb_probe(device_t dev)
   55 {
   56 
   57         if (pci_cfgregopen() == 0)
   58                 return (ENXIO);
   59         if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
   60                 return (ENXIO);
   61         device_set_desc(dev, "MPTable Host-PCI bridge");
   62         return (0);
   63 }
   64 
   65 static int
   66 mptable_hostb_attach(device_t dev)
   67 {
   68 
   69 #ifdef NEW_PCIB
   70         mptable_pci_host_res_init(dev);
   71 #endif
   72         device_add_child(dev, "pci", pcib_get_bus(dev));
   73         return (bus_generic_attach(dev));
   74 }
   75 
   76 /* Pass MSI requests up to the nexus. */
   77 static int
   78 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
   79     int *irqs)
   80 {
   81         device_t bus;
   82 
   83         bus = device_get_parent(pcib);
   84         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
   85             irqs));
   86 }
   87 
   88 static int
   89 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
   90 {
   91         device_t bus;
   92 
   93         bus = device_get_parent(pcib);
   94         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
   95 }
   96 
   97 #ifdef NEW_PCIB
   98 static int
   99 mptable_is_isa_range(u_long start, u_long end)
  100 {
  101 
  102         if (end >= 0x10000)
  103                 return (0);
  104         if ((start & 0xfc00) != (end & 0xfc00))
  105                 return (0);
  106         start &= ~0xfc00;
  107         end &= ~0xfc00;
  108         return (start >= 0x100 && end <= 0x3ff);
  109 }
  110 
  111 static int
  112 mptable_is_vga_range(u_long start, u_long end)
  113 {
  114         if (end >= 0x10000)
  115                 return (0);
  116         if ((start & 0xfc00) != (end & 0xfc00))
  117                 return (0);
  118         start &= ~0xfc00;
  119         end &= ~0xfc00;
  120         return (pci_is_vga_ioport_range(start, end));
  121 }
  122 
  123 static struct resource *
  124 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
  125     u_long start, u_long end, u_long count, u_int flags)
  126 {
  127         struct mptable_hostb_softc *sc;
  128 
  129         sc = device_get_softc(dev);
  130         if (type == SYS_RES_IOPORT && start + count - 1 == end) {
  131                 if (mptable_is_isa_range(start, end)) {
  132                         switch (sc->sc_decodes_isa_io) {
  133                         case -1:
  134                                 return (NULL);
  135                         case 1:
  136                                 return (bus_generic_alloc_resource(dev, child,
  137                                     type, rid, start, end, count, flags));
  138                         default:
  139                                 break;
  140                         }
  141                 }
  142                 if (mptable_is_vga_range(start, end)) {
  143                         switch (sc->sc_decodes_vga_io) {
  144                         case -1:
  145                                 return (NULL);
  146                         case 1:
  147                                 return (bus_generic_alloc_resource(dev, child,
  148                                     type, rid, start, end, count, flags));
  149                         default:
  150                                 break;
  151                         }
  152                 }
  153         }
  154         start = hostb_alloc_start(type, start, end, count);
  155         return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start,
  156             end, count, flags));
  157 }
  158 
  159 static int
  160 mptable_hostb_adjust_resource(device_t dev, device_t child, int type,
  161     struct resource *r, u_long start, u_long end)
  162 {
  163         struct mptable_hostb_softc *sc;
  164 
  165         sc = device_get_softc(dev);
  166         return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start,
  167             end));
  168 }
  169 #endif
  170 
  171 static device_method_t mptable_hostb_methods[] = {
  172         /* Device interface */
  173         DEVMETHOD(device_probe,         mptable_hostb_probe),
  174         DEVMETHOD(device_attach,        mptable_hostb_attach),
  175         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  176         DEVMETHOD(device_suspend,       bus_generic_suspend),
  177         DEVMETHOD(device_resume,        bus_generic_resume),
  178 
  179         /* Bus interface */
  180         DEVMETHOD(bus_read_ivar,        legacy_pcib_read_ivar),
  181         DEVMETHOD(bus_write_ivar,       legacy_pcib_write_ivar),
  182 #ifdef NEW_PCIB
  183         DEVMETHOD(bus_alloc_resource,   mptable_hostb_alloc_resource),
  184         DEVMETHOD(bus_adjust_resource,  mptable_hostb_adjust_resource),
  185 #else
  186         DEVMETHOD(bus_alloc_resource,   legacy_pcib_alloc_resource),
  187         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
  188 #endif
  189         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  190         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  191         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  192         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  193         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  194 
  195         /* pcib interface */
  196         DEVMETHOD(pcib_maxslots,        legacy_pcib_maxslots),
  197         DEVMETHOD(pcib_read_config,     legacy_pcib_read_config),
  198         DEVMETHOD(pcib_write_config,    legacy_pcib_write_config),
  199         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  200         DEVMETHOD(pcib_alloc_msi,       mptable_hostb_alloc_msi),
  201         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
  202         DEVMETHOD(pcib_alloc_msix,      mptable_hostb_alloc_msix),
  203         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
  204         DEVMETHOD(pcib_map_msi,         legacy_pcib_map_msi),
  205 
  206         DEVMETHOD_END
  207 };
  208 
  209 static devclass_t hostb_devclass;
  210 
  211 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods,
  212     sizeof(struct mptable_hostb_softc));
  213 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
  214 
  215 /* PCI to PCI bridge driver. */
  216 
  217 static int
  218 mptable_pcib_probe(device_t dev)
  219 {
  220         int bus;
  221 
  222         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
  223             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
  224                 return (ENXIO);
  225         bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
  226         if (bus == 0)
  227                 return (ENXIO);
  228         if (mptable_pci_probe_table(bus) != 0)
  229                 return (ENXIO);
  230         device_set_desc(dev, "MPTable PCI-PCI bridge");
  231         return (-1000);
  232 }
  233 
  234 static device_method_t mptable_pcib_pci_methods[] = {
  235         /* Device interface */
  236         DEVMETHOD(device_probe,         mptable_pcib_probe),
  237 
  238         /* pcib interface */
  239         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  240 
  241         {0, 0}
  242 };
  243 
  244 static devclass_t pcib_devclass;
  245 
  246 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
  247     sizeof(struct pcib_softc), pcib_driver);
  248 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);

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

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