sys/bus/pci/i386/mptable_pci.c

   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  * $FreeBSD @169221
  30  */
  31
  32 /*
  33  * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
  34  * interrupts from PCI devices to I/O APICs.
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/bus.h>
  40 #include <sys/kernel.h>
  41 #include <sys/module.h>
  42
  43 #include <bus/pci/pcireg.h>
  44 #include <bus/pci/pcivar.h>
  45 #include <bus/pci/pcib_private.h>
  46
  47 #include <machine/smp.h>
  48
  49 #include "legacyvar.h"
  50 #include "pci_cfgreg.h"
  51
  52 #include "pcib_if.h"
  53
  54 static int
  55 mptable_pci_route_interrupt(device_t pcib, device_t dev, int pin)
  56 {
  57         int line, bus, slot;
  58
  59         bus = pci_get_bus(dev);
  60         slot = pci_get_slot(dev);
  61
  62         line = pci_apic_irq(bus, slot, pin);
  63         if (line >= 0) {
  64                 return line;
  65         } else {
  66                 int irq = pci_get_irq(dev);
  67
  68                 /*
  69                  * PCI interrupts might be redirected to the
  70                  * ISA bus according to some MP tables.  Use the
  71                  * same methods as used by the ISA devices
  72                  * devices to find the proper IOAPIC int pin.
  73                  */
  74                 kprintf("MPTable: Try routing through ISA bus for "
  75                         "bus %d slot %d INT%c irq %d\n",
  76                         bus, slot, 'A' + pin - 1, irq);
  77                 line = isa_apic_irq(irq);
  78                 if (line >= 0)
  79                         return line;
  80         }
  81
  82         kprintf("MPTable: Unable to route for bus %d slot %d INT%c\n",
  83                 bus, slot, 'A' + pin - 1);
  84         return PCI_INVALID_IRQ;
  85 }
  86
  87 /* Host to PCI bridge driver. */
  88
  89 static int
  90 mptable_hostb_probe(device_t dev)
  91 {
  92
  93         if (pci_cfgregopen() == 0)
  94                 return (ENXIO);
  95 #ifdef notyet
  96         if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
  97                 return (ENXIO);
  98 #endif
  99         device_set_desc(dev, "MPTable Host-PCI bridge");
 100         return (0);
 101 }
 102
 103 static int
 104 mptable_hostb_attach(device_t dev)
 105 {
 106
 107         device_add_child(dev, "pci", pcib_get_bus(dev));
 108         return (bus_generic_attach(dev));
 109 }
 110
 111 /* Pass MSI requests up to the nexus. */
 112 static int
 113 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
 114     int *irqs)
 115 {
 116         device_t bus;
 117
 118         bus = device_get_parent(pcib);
 119         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
 120             irqs));
 121 }
 122
 123 static int
 124 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
 125 {
 126         device_t bus;
 127
 128         bus = device_get_parent(pcib);
 129         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
 130 }
 131
 132 static int
 133 mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
 134     uint32_t *data)
 135 {
 136         device_t bus;
 137
 138         bus = device_get_parent(pcib);
 139         return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
 140 }
 141
 142 static device_method_t mptable_hostb_methods[] = {
 143         /* Device interface */
 144         DEVMETHOD(device_probe,         mptable_hostb_probe),
 145         DEVMETHOD(device_attach,        mptable_hostb_attach),
 146         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 147         DEVMETHOD(device_suspend,       bus_generic_suspend),
 148         DEVMETHOD(device_resume,        bus_generic_resume),
 149
 150         /* Bus interface */
 151         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 152         DEVMETHOD(bus_read_ivar,        legacy_pcib_read_ivar),
 153         DEVMETHOD(bus_write_ivar,       legacy_pcib_write_ivar),
 154         DEVMETHOD(bus_alloc_resource,   legacy_pcib_alloc_resource),
 155         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
 156         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
 157         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
 158         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
 159         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
 160
 161         /* pcib interface */
 162         DEVMETHOD(pcib_maxslots,        legacy_pcib_maxslots),
 163         DEVMETHOD(pcib_read_config,     legacy_pcib_read_config),
 164         DEVMETHOD(pcib_write_config,    legacy_pcib_write_config),
 165         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
 166         DEVMETHOD(pcib_alloc_msi,       mptable_hostb_alloc_msi),
 167         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
 168         DEVMETHOD(pcib_alloc_msix,      mptable_hostb_alloc_msix),
 169         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
 170         DEVMETHOD(pcib_map_msi,         mptable_hostb_map_msi),
 171
 172         { 0, 0 }
 173 };
 174
 175 static devclass_t hostb_devclass;
 176
 177 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1);
 178 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
 179
 180 /* PCI to PCI bridge driver. */
 181
 182 static int
 183 mptable_pcib_probe(device_t dev)
 184 {
 185         int bus;
 186
 187         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
 188             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
 189                 return (ENXIO);
 190         bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
 191         if (bus == 0)
 192                 return (ENXIO);
 193 #ifdef notyet
 194         if (mptable_pci_probe_table(bus) != 0)
 195                 return (ENXIO);
 196 #endif
 197         device_set_desc(dev, "MPTable PCI-PCI bridge");
 198         return (-500);
 199 }
 200
 201 static device_method_t mptable_pcib_pci_methods[] = {
 202         /* Device interface */
 203         DEVMETHOD(device_probe,         mptable_pcib_probe),
 204         DEVMETHOD(device_attach,        pcib_attach),
 205         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 206         DEVMETHOD(device_suspend,       bus_generic_suspend),
 207         DEVMETHOD(device_resume,        bus_generic_resume),
 208
 209         /* Bus interface */
 210         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 211         DEVMETHOD(bus_read_ivar,        pcib_read_ivar),
 212         DEVMETHOD(bus_write_ivar,       pcib_write_ivar),
 213         DEVMETHOD(bus_alloc_resource,   pcib_alloc_resource),
 214         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
 215         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
 216         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
 217         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
 218         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
 219
 220         /* pcib interface */
 221         DEVMETHOD(pcib_maxslots,        pcib_maxslots),
 222         DEVMETHOD(pcib_read_config,     pcib_read_config),
 223         DEVMETHOD(pcib_write_config,    pcib_write_config),
 224         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
 225         DEVMETHOD(pcib_alloc_msi,       pcib_alloc_msi),
 226         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
 227         DEVMETHOD(pcib_alloc_msix,      pcib_alloc_msix),
 228         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
 229         DEVMETHOD(pcib_map_msi,         pcib_map_msi),
 230
 231         {0, 0}
 232 };
 233
 234 static devclass_t pcib_devclass;
 235
 236 DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
 237     sizeof(struct pcib_softc));
 238 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);