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  * 3. Neither the name of the author nor the names of any co-contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 /*
   31  * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
   32  * interrupts from PCI devices to I/O APICs.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/9.1/sys/x86/x86/mptable_pci.c 234150 2012-04-11 20:50:17Z jhb $");
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/bus.h>
   41 #include <sys/kernel.h>
   42 #include <sys/module.h>
   43 #include <sys/rman.h>
   44 
   45 #include <dev/pci/pcireg.h>
   46 #include <dev/pci/pcivar.h>
   47 #include <dev/pci/pcib_private.h>
   48 #include <x86/mptable.h>
   49 #include <machine/legacyvar.h>
   50 #include <machine/pci_cfgreg.h>
   51 
   52 #include "pcib_if.h"
   53 
   54 /* Host to PCI bridge driver. */
   55 
   56 static int
   57 mptable_hostb_probe(device_t dev)
   58 {
   59 
   60         if (pci_cfgregopen() == 0)
   61                 return (ENXIO);
   62         if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
   63                 return (ENXIO);
   64         device_set_desc(dev, "MPTable Host-PCI bridge");
   65         return (0);
   66 }
   67 
   68 static int
   69 mptable_hostb_attach(device_t dev)
   70 {
   71 
   72 #ifdef NEW_PCIB
   73         mptable_pci_host_res_init(dev);
   74 #endif
   75         device_add_child(dev, "pci", pcib_get_bus(dev));
   76         return (bus_generic_attach(dev));
   77 }
   78 
   79 /* Pass MSI requests up to the nexus. */
   80 static int
   81 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
   82     int *irqs)
   83 {
   84         device_t bus;
   85 
   86         bus = device_get_parent(pcib);
   87         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
   88             irqs));
   89 }
   90 
   91 static int
   92 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
   93 {
   94         device_t bus;
   95 
   96         bus = device_get_parent(pcib);
   97         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
   98 }
   99 
  100 #ifdef NEW_PCIB
  101 static int
  102 mptable_is_isa_range(u_long start, u_long end)
  103 {
  104 
  105         if (end >= 0x10000)
  106                 return (0);
  107         if ((start & 0xfc00) != (end & 0xfc00))
  108                 return (0);
  109         start &= ~0xfc00;
  110         end &= ~0xfc00;
  111         return (start >= 0x100 && end <= 0x3ff);
  112 }
  113 
  114 static int
  115 mptable_is_vga_range(u_long start, u_long end)
  116 {
  117         if (end >= 0x10000)
  118                 return (0);
  119         if ((start & 0xfc00) != (end & 0xfc00))
  120                 return (0);
  121         start &= ~0xfc00;
  122         end &= ~0xfc00;
  123         return (pci_is_vga_ioport_range(start, end));
  124 }
  125 
  126 static struct resource *
  127 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
  128     u_long start, u_long end, u_long count, u_int flags)
  129 {
  130         struct mptable_hostb_softc *sc;
  131 
  132         sc = device_get_softc(dev);
  133         if (type == SYS_RES_IOPORT && start + count - 1 == end) {
  134                 if (mptable_is_isa_range(start, end)) {
  135                         switch (sc->sc_decodes_isa_io) {
  136                         case -1:
  137                                 return (NULL);
  138                         case 1:
  139                                 return (bus_generic_alloc_resource(dev, child,
  140                                     type, rid, start, end, count, flags));
  141                         default:
  142                                 break;
  143                         }
  144                 }
  145                 if (mptable_is_vga_range(start, end)) {
  146                         switch (sc->sc_decodes_vga_io) {
  147                         case -1:
  148                                 return (NULL);
  149                         case 1:
  150                                 return (bus_generic_alloc_resource(dev, child,
  151                                     type, rid, start, end, count, flags));
  152                         default:
  153                                 break;
  154                         }
  155                 }
  156         }
  157         start = hostb_alloc_start(type, start, end, count);
  158         return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start,
  159             end, count, flags));
  160 }
  161 
  162 static int
  163 mptable_hostb_adjust_resource(device_t dev, device_t child, int type,
  164     struct resource *r, u_long start, u_long end)
  165 {
  166         struct mptable_hostb_softc *sc;
  167 
  168         sc = device_get_softc(dev);
  169         return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start,
  170             end));
  171 }
  172 #endif
  173 
  174 static device_method_t mptable_hostb_methods[] = {
  175         /* Device interface */
  176         DEVMETHOD(device_probe,         mptable_hostb_probe),
  177         DEVMETHOD(device_attach,        mptable_hostb_attach),
  178         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  179         DEVMETHOD(device_suspend,       bus_generic_suspend),
  180         DEVMETHOD(device_resume,        bus_generic_resume),
  181 
  182         /* Bus interface */
  183         DEVMETHOD(bus_read_ivar,        legacy_pcib_read_ivar),
  184         DEVMETHOD(bus_write_ivar,       legacy_pcib_write_ivar),
  185 #ifdef NEW_PCIB
  186         DEVMETHOD(bus_alloc_resource,   mptable_hostb_alloc_resource),
  187         DEVMETHOD(bus_adjust_resource,  mptable_hostb_adjust_resource),
  188 #else
  189         DEVMETHOD(bus_alloc_resource,   legacy_pcib_alloc_resource),
  190         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
  191 #endif
  192         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  193         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  194         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  195         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  196         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  197 
  198         /* pcib interface */
  199         DEVMETHOD(pcib_maxslots,        legacy_pcib_maxslots),
  200         DEVMETHOD(pcib_read_config,     legacy_pcib_read_config),
  201         DEVMETHOD(pcib_write_config,    legacy_pcib_write_config),
  202         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  203         DEVMETHOD(pcib_alloc_msi,       mptable_hostb_alloc_msi),
  204         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
  205         DEVMETHOD(pcib_alloc_msix,      mptable_hostb_alloc_msix),
  206         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
  207         DEVMETHOD(pcib_map_msi,         legacy_pcib_map_msi),
  208 
  209         DEVMETHOD_END
  210 };
  211 
  212 static devclass_t hostb_devclass;
  213 
  214 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods,
  215     sizeof(struct mptable_hostb_softc));
  216 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
  217 
  218 /* PCI to PCI bridge driver. */
  219 
  220 static int
  221 mptable_pcib_probe(device_t dev)
  222 {
  223         int bus;
  224 
  225         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
  226             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
  227                 return (ENXIO);
  228         bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
  229         if (bus == 0)
  230                 return (ENXIO);
  231         if (mptable_pci_probe_table(bus) != 0)
  232                 return (ENXIO);
  233         device_set_desc(dev, "MPTable PCI-PCI bridge");
  234         return (-1000);
  235 }
  236 
  237 static device_method_t mptable_pcib_pci_methods[] = {
  238         /* Device interface */
  239         DEVMETHOD(device_probe,         mptable_pcib_probe),
  240 
  241         /* pcib interface */
  242         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  243 
  244         {0, 0}
  245 };
  246 
  247 static devclass_t pcib_devclass;
  248 
  249 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
  250     sizeof(struct pcib_softc), pcib_driver);
  251 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