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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 1997, Stefan Esser <se@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 unmodified, 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include "opt_cpu.h"
- #include <sys/param.h>
- #include <sys/systm.h>
- #include <sys/bus.h>
- #include <sys/kernel.h>
- #include <sys/malloc.h>
- #include <sys/module.h>
- #include <sys/rman.h>
- #include <sys/sysctl.h>
- #include <dev/pci/pcivar.h>
- #include <dev/pci/pcireg.h>
- #include <dev/pci/pcib_private.h>
- #include <isa/isavar.h>
- #ifdef CPU_ELAN
- #include <machine/md_var.h>
- #endif
- #include <x86/legacyvar.h>
- #include <machine/pci_cfgreg.h>
- #include <machine/resource.h>
- #include "pcib_if.h"
- int
- legacy_pcib_maxslots(device_t dev)
- {
- return 31;
- }
- /* read configuration space register */
- uint32_t
- legacy_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
- u_int reg, int bytes)
- {
- return(pci_cfgregread(bus, slot, func, reg, bytes));
- }
- /* write configuration space register */
- void
- legacy_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
- u_int reg, uint32_t data, int bytes)
- {
- pci_cfgregwrite(bus, slot, func, reg, data, bytes);
- }
- /* route interrupt */
- static int
- legacy_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
- {
- #ifdef __HAVE_PIR
- return (pci_pir_route_interrupt(pci_get_bus(dev), pci_get_slot(dev),
- pci_get_function(dev), pin));
- #else
- /* No routing possible */
- return (PCI_INVALID_IRQ);
- #endif
- }
- /* Pass MSI requests up to the nexus. */
- int
- legacy_pcib_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));
- }
- int
- legacy_pcib_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));
- }
- int
- legacy_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
- uint32_t *data)
- {
- device_t bus, hostb;
- int error, func, slot;
- bus = device_get_parent(pcib);
- error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
- if (error)
- return (error);
- slot = legacy_get_pcislot(pcib);
- func = legacy_get_pcifunc(pcib);
- if (slot == -1 || func == -1)
- return (0);
- hostb = pci_find_bsf(0, slot, func);
- KASSERT(hostb != NULL, ("%s: missing hostb for 0:%d:%d", __func__,
- slot, func));
- pci_ht_map_msi(hostb, *addr);
- return (0);
- }
- static const char *
- legacy_pcib_is_host_bridge(int bus, int slot, int func,
- uint32_t id, uint8_t class, uint8_t subclass,
- uint8_t *busnum)
- {
- #ifdef __i386__
- const char *s = NULL;
- static uint8_t pxb[4]; /* hack for 450nx */
- *busnum = 0;
- switch (id) {
- case 0x12258086:
- s = "Intel 824?? host to PCI bridge";
- /* XXX This is a guess */
- /* *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x41, 1); */
- *busnum = bus;
- break;
- case 0x71208086:
- s = "Intel 82810 (i810 GMCH) Host To Hub bridge";
- break;
- case 0x71228086:
- s = "Intel 82810-DC100 (i810-DC100 GMCH) Host To Hub bridge";
- break;
- case 0x71248086:
- s = "Intel 82810E (i810E GMCH) Host To Hub bridge";
- break;
- case 0x11308086:
- s = "Intel 82815 (i815 GMCH) Host To Hub bridge";
- break;
- case 0x71808086:
- s = "Intel 82443LX (440 LX) host to PCI bridge";
- break;
- case 0x71908086:
- s = "Intel 82443BX (440 BX) host to PCI bridge";
- break;
- case 0x71928086:
- s = "Intel 82443BX host to PCI bridge (AGP disabled)";
- break;
- case 0x71948086:
- s = "Intel 82443MX host to PCI bridge";
- break;
- case 0x71a08086:
- s = "Intel 82443GX host to PCI bridge";
- break;
- case 0x71a18086:
- s = "Intel 82443GX host to AGP bridge";
- break;
- case 0x71a28086:
- s = "Intel 82443GX host to PCI bridge (AGP disabled)";
- break;
- case 0x84c48086:
- s = "Intel 82454KX/GX (Orion) host to PCI bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x4a, 1);
- break;
- case 0x84ca8086:
- /*
- * For the 450nx chipset, there is a whole bundle of
- * things pretending to be host bridges. The MIOC will
- * be seen first and isn't really a pci bridge (the
- * actual buses are attached to the PXB's). We need to
- * read the registers of the MIOC to figure out the
- * bus numbers for the PXB channels.
- *
- * Since the MIOC doesn't have a pci bus attached, we
- * pretend it wasn't there.
- */
- pxb[0] = legacy_pcib_read_config(0, bus, slot, func,
- 0xd0, 1); /* BUSNO[0] */
- pxb[1] = legacy_pcib_read_config(0, bus, slot, func,
- 0xd1, 1) + 1; /* SUBA[0]+1 */
- pxb[2] = legacy_pcib_read_config(0, bus, slot, func,
- 0xd3, 1); /* BUSNO[1] */
- pxb[3] = legacy_pcib_read_config(0, bus, slot, func,
- 0xd4, 1) + 1; /* SUBA[1]+1 */
- return NULL;
- case 0x84cb8086:
- switch (slot) {
- case 0x12:
- s = "Intel 82454NX PXB#0, Bus#A";
- *busnum = pxb[0];
- break;
- case 0x13:
- s = "Intel 82454NX PXB#0, Bus#B";
- *busnum = pxb[1];
- break;
- case 0x14:
- s = "Intel 82454NX PXB#1, Bus#A";
- *busnum = pxb[2];
- break;
- case 0x15:
- s = "Intel 82454NX PXB#1, Bus#B";
- *busnum = pxb[3];
- break;
- }
- break;
- case 0x1A308086:
- s = "Intel 82845 Host to PCI bridge";
- break;
- /* AMD -- vendor 0x1022 */
- case 0x30001022:
- s = "AMD Elan SC520 host to PCI bridge";
- #ifdef CPU_ELAN
- init_AMD_Elan_sc520();
- #else
- printf(
- "*** WARNING: missing CPU_ELAN -- timekeeping may be wrong\n");
- #endif
- break;
- case 0x70061022:
- s = "AMD-751 host to PCI bridge";
- break;
- case 0x700e1022:
- s = "AMD-761 host to PCI bridge";
- break;
- /* SiS -- vendor 0x1039 */
- case 0x04961039:
- s = "SiS 85c496";
- break;
- case 0x04061039:
- s = "SiS 85c501";
- break;
- case 0x06011039:
- s = "SiS 85c601";
- break;
- case 0x55911039:
- s = "SiS 5591 host to PCI bridge";
- break;
- case 0x00011039:
- s = "SiS 5591 host to AGP bridge";
- break;
- /* VLSI -- vendor 0x1004 */
- case 0x00051004:
- s = "VLSI 82C592 Host to PCI bridge";
- break;
- /* XXX Here is MVP3, I got the datasheet but NO M/B to test it */
- /* totally. Please let me know if anything wrong. -F */
- /* XXX need info on the MVP3 -- any takers? */
- case 0x05981106:
- s = "VIA 82C598MVP (Apollo MVP3) host bridge";
- break;
- /* AcerLabs -- vendor 0x10b9 */
- /* Funny : The datasheet told me vendor id is "10b8",sub-vendor */
- /* id is '10b9" but the register always shows "10b9". -Foxfair */
- case 0x154110b9:
- s = "AcerLabs M1541 (Aladdin-V) PCI host bridge";
- break;
- /* OPTi -- vendor 0x1045 */
- case 0xc7011045:
- s = "OPTi 82C700 host to PCI bridge";
- break;
- case 0xc8221045:
- s = "OPTi 82C822 host to PCI Bridge";
- break;
- /* ServerWorks -- vendor 0x1166 */
- case 0x00051166:
- s = "ServerWorks NB6536 2.0HE host to PCI bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- case 0x00061166:
- /* FALLTHROUGH */
- case 0x00081166:
- /* FALLTHROUGH */
- case 0x02011166:
- /* FALLTHROUGH */
- case 0x010f1014: /* IBM re-badged ServerWorks chipset */
- s = "ServerWorks host to PCI bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- case 0x00091166:
- s = "ServerWorks NB6635 3.0LE host to PCI bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- case 0x00101166:
- s = "ServerWorks CIOB30 host to PCI bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- case 0x00111166:
- /* FALLTHROUGH */
- case 0x03021014: /* IBM re-badged ServerWorks chipset */
- s = "ServerWorks CMIC-HE host to PCI-X bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- /* XXX unknown chipset, but working */
- case 0x00171166:
- /* FALLTHROUGH */
- case 0x01011166:
- case 0x01101166:
- case 0x02251166:
- s = "ServerWorks host to PCI bridge(unknown chipset)";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0x44, 1);
- break;
- /* Compaq/HP -- vendor 0x0e11 */
- case 0x60100e11:
- s = "Compaq/HP Model 6010 HotPlug PCI Bridge";
- *busnum = legacy_pcib_read_config(0, bus, slot, func, 0xc8, 1);
- break;
- /* Integrated Micro Solutions -- vendor 0x10e0 */
- case 0x884910e0:
- s = "Integrated Micro Solutions VL Bridge";
- break;
- default:
- if (class == PCIC_BRIDGE && subclass == PCIS_BRIDGE_HOST)
- s = "Host to PCI bridge";
- break;
- }
- return s;
- #else
- const char *s = NULL;
- *busnum = 0;
- if (class == PCIC_BRIDGE && subclass == PCIS_BRIDGE_HOST)
- s = "Host to PCI bridge";
- return s;
- #endif
- }
- /*
- * Scan the first pci bus for host-pci bridges and add pcib instances
- * to the nexus for each bridge.
- */
- static void
- legacy_pcib_identify(driver_t *driver, device_t parent)
- {
- int bus, slot, func;
- uint8_t hdrtype;
- int found = 0;
- int pcifunchigh;
- int found824xx = 0;
- int found_orion = 0;
- device_t child;
- devclass_t pci_devclass;
- if (pci_cfgregopen() == 0)
- return;
- /*
- * Check to see if we haven't already had a PCI bus added
- * via some other means. If we have, bail since otherwise
- * we're going to end up duplicating it.
- */
- if ((pci_devclass = devclass_find("pci")) &&
- devclass_get_device(pci_devclass, 0))
- return;
- bus = 0;
- retry:
- for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
- func = 0;
- hdrtype = legacy_pcib_read_config(0, bus, slot, func,
- PCIR_HDRTYPE, 1);
- /*
- * When enumerating bus devices, the standard says that
- * one should check the header type and ignore the slots whose
- * header types that the software doesn't know about. We use
- * this to filter out devices.
- */
- if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
- continue;
- if ((hdrtype & PCIM_MFDEV) &&
- (!found_orion || hdrtype != 0xff))
- pcifunchigh = PCI_FUNCMAX;
- else
- pcifunchigh = 0;
- for (func = 0; func <= pcifunchigh; func++) {
- /*
- * Read the IDs and class from the device.
- */
- uint32_t id;
- uint8_t class, subclass, busnum;
- const char *s;
- device_t *devs;
- int ndevs, i;
- id = legacy_pcib_read_config(0, bus, slot, func,
- PCIR_DEVVENDOR, 4);
- if (id == -1)
- continue;
- class = legacy_pcib_read_config(0, bus, slot, func,
- PCIR_CLASS, 1);
- subclass = legacy_pcib_read_config(0, bus, slot, func,
- PCIR_SUBCLASS, 1);
- s = legacy_pcib_is_host_bridge(bus, slot, func,
- id, class, subclass,
- &busnum);
- if (s == NULL)
- continue;
- /*
- * Check to see if the physical bus has already
- * been seen. Eg: hybrid 32 and 64 bit host
- * bridges to the same logical bus.
- */
- if (device_get_children(parent, &devs, &ndevs) == 0) {
- for (i = 0; s != NULL && i < ndevs; i++) {
- if (strcmp(device_get_name(devs[i]),
- "pcib") != 0)
- continue;
- if (legacy_get_pcibus(devs[i]) == busnum)
- s = NULL;
- }
- free(devs, M_TEMP);
- }
- if (s == NULL)
- continue;
- /*
- * Add at priority 100 to make sure we
- * go after any motherboard resources
- */
- child = BUS_ADD_CHILD(parent, 100,
- "pcib", busnum);
- device_set_desc(child, s);
- legacy_set_pcibus(child, busnum);
- legacy_set_pcislot(child, slot);
- legacy_set_pcifunc(child, func);
- found = 1;
- if (id == 0x12258086)
- found824xx = 1;
- if (id == 0x84c48086)
- found_orion = 1;
- }
- }
- if (found824xx && bus == 0) {
- bus++;
- goto retry;
- }
- /*
- * Make sure we add at least one bridge since some old
- * hardware doesn't actually have a host-pci bridge device.
- * Note that pci_cfgregopen() thinks we have PCI devices..
- */
- if (!found) {
- if (bootverbose)
- printf(
- "legacy_pcib_identify: no bridge found, adding pcib0 anyway\n");
- child = BUS_ADD_CHILD(parent, 100, "pcib", 0);
- legacy_set_pcibus(child, 0);
- }
- }
- static int
- legacy_pcib_probe(device_t dev)
- {
- if (pci_cfgregopen() == 0)
- return ENXIO;
- return -100;
- }
- static int
- legacy_pcib_attach(device_t dev)
- {
- #ifdef __HAVE_PIR
- device_t pir;
- #endif
- int bus;
- bus = pcib_get_bus(dev);
- #ifdef __HAVE_PIR
- /*
- * Look for a PCI BIOS interrupt routing table as that will be
- * our method of routing interrupts if we have one.
- */
- if (pci_pir_probe(bus, 0)) {
- pir = BUS_ADD_CHILD(device_get_parent(dev), 0, "pir", 0);
- if (pir != NULL)
- device_probe_and_attach(pir);
- }
- #endif
- device_add_child(dev, "pci", -1);
- return bus_generic_attach(dev);
- }
- int
- legacy_pcib_read_ivar(device_t dev, device_t child, int which,
- uintptr_t *result)
- {
- switch (which) {
- case PCIB_IVAR_DOMAIN:
- *result = 0;
- return 0;
- case PCIB_IVAR_BUS:
- *result = legacy_get_pcibus(dev);
- return 0;
- }
- return ENOENT;
- }
- int
- legacy_pcib_write_ivar(device_t dev, device_t child, int which,
- uintptr_t value)
- {
- switch (which) {
- case PCIB_IVAR_DOMAIN:
- return EINVAL;
- case PCIB_IVAR_BUS:
- legacy_set_pcibus(dev, value);
- return 0;
- }
- return ENOENT;
- }
- /*
- * Helper routine for x86 Host-PCI bridge driver resource allocation.
- * This is used to adjust the start address of wildcard allocation
- * requests to avoid low addresses that are known to be problematic.
- *
- * If no memory preference is given, use upper 32MB slot most BIOSes
- * use for their memory window. This is typically only used on older
- * laptops that don't have PCI buses behind a PCI bridge, so assuming
- * > 32MB is likely OK.
- *
- * However, this can cause problems for other chipsets, so we make
- * this tunable by hw.pci.host_mem_start.
- */
- SYSCTL_DECL(_hw_pci);
- static unsigned long host_mem_start = 0x80000000;
- SYSCTL_ULONG(_hw_pci, OID_AUTO, host_mem_start, CTLFLAG_RDTUN, &host_mem_start,
- 0, "Limit the host bridge memory to being above this address.");
- rman_res_t
- hostb_alloc_start(int type, rman_res_t start, rman_res_t end, rman_res_t count)
- {
- if (start + count - 1 != end) {
- if (type == SYS_RES_MEMORY && start < host_mem_start)
- start = host_mem_start;
- if (type == SYS_RES_IOPORT && start < 0x1000)
- start = 0x1000;
- }
- return (start);
- }
- struct resource *
- legacy_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
- rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
- {
- #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
- if (type == PCI_RES_BUS)
- return (pci_domain_alloc_bus(0, child, rid, start, end, count,
- flags));
- #endif
- start = hostb_alloc_start(type, start, end, count);
- return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
- count, flags));
- }
- #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
- int
- legacy_pcib_adjust_resource(device_t dev, device_t child, int type,
- struct resource *r, rman_res_t start, rman_res_t end)
- {
- if (type == PCI_RES_BUS)
- return (pci_domain_adjust_bus(0, child, r, start, end));
- return (bus_generic_adjust_resource(dev, child, type, r, start, end));
- }
- int
- legacy_pcib_release_resource(device_t dev, device_t child, int type, int rid,
- struct resource *r)
- {
- if (type == PCI_RES_BUS)
- return (pci_domain_release_bus(0, child, rid, r));
- return (bus_generic_release_resource(dev, child, type, rid, r));
- }
- #endif
- static device_method_t legacy_pcib_methods[] = {
- /* Device interface */
- DEVMETHOD(device_identify, legacy_pcib_identify),
- DEVMETHOD(device_probe, legacy_pcib_probe),
- DEVMETHOD(device_attach, legacy_pcib_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),
- #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
- DEVMETHOD(bus_adjust_resource, legacy_pcib_adjust_resource),
- DEVMETHOD(bus_release_resource, legacy_pcib_release_resource),
- #else
- DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
- DEVMETHOD(bus_release_resource, bus_generic_release_resource),
- #endif
- 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, legacy_pcib_route_interrupt),
- DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi),
- DEVMETHOD(pcib_release_msi, pcib_release_msi),
- DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix),
- DEVMETHOD(pcib_release_msix, pcib_release_msix),
- DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi),
- DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
- DEVMETHOD_END
- };
- static devclass_t hostb_devclass;
- DEFINE_CLASS_0(pcib, legacy_pcib_driver, legacy_pcib_methods, 1);
- DRIVER_MODULE(pcib, legacy, legacy_pcib_driver, hostb_devclass, 0, 0);
- /*
- * Install placeholder to claim the resources owned by the
- * PCI bus interface. This could be used to extract the
- * config space registers in the extreme case where the PnP
- * ID is available and the PCI BIOS isn't, but for now we just
- * eat the PnP ID and do nothing else.
- *
- * we silence this probe, as it will generally confuse people.
- */
- static struct isa_pnp_id pcibus_pnp_ids[] = {
- { 0x030ad041 /* PNP0A03 */, "PCI Bus" },
- { 0x080ad041 /* PNP0A08 */, "PCIe Bus" },
- { 0 }
- };
- static int
- pcibus_pnp_probe(device_t dev)
- {
- int result;
- if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, pcibus_pnp_ids)) <= 0)
- device_quiet(dev);
- return(result);
- }
- static int
- pcibus_pnp_attach(device_t dev)
- {
- return(0);
- }
- static device_method_t pcibus_pnp_methods[] = {
- /* Device interface */
- DEVMETHOD(device_probe, pcibus_pnp_probe),
- DEVMETHOD(device_attach, pcibus_pnp_attach),
- DEVMETHOD(device_detach, bus_generic_detach),
- DEVMETHOD(device_shutdown, bus_generic_shutdown),
- DEVMETHOD(device_suspend, bus_generic_suspend),
- DEVMETHOD(device_resume, bus_generic_resume),
- { 0, 0 }
- };
- static devclass_t pcibus_pnp_devclass;
- DEFINE_CLASS_0(pcibus_pnp, pcibus_pnp_driver, pcibus_pnp_methods, 1);
- DRIVER_MODULE(pcibus_pnp, isa, pcibus_pnp_driver, pcibus_pnp_devclass, 0, 0);
- #ifdef __HAVE_PIR
- /*
- * Provide a PCI-PCI bridge driver for PCI buses behind PCI-PCI bridges
- * that appear in the PCIBIOS Interrupt Routing Table to use the routing
- * table for interrupt routing when possible.
- */
- static int pcibios_pcib_probe(device_t bus);
- static device_method_t pcibios_pcib_pci_methods[] = {
- /* Device interface */
- DEVMETHOD(device_probe, pcibios_pcib_probe),
- /* pcib interface */
- DEVMETHOD(pcib_route_interrupt, legacy_pcib_route_interrupt),
- {0, 0}
- };
- static devclass_t pcib_devclass;
- DEFINE_CLASS_1(pcib, pcibios_pcib_driver, pcibios_pcib_pci_methods,
- sizeof(struct pcib_softc), pcib_driver);
- DRIVER_MODULE(pcibios_pcib, pci, pcibios_pcib_driver, pcib_devclass, 0, 0);
- ISA_PNP_INFO(pcibus_pnp_ids);
- static int
- pcibios_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 (!pci_pir_probe(bus, 1))
- return (ENXIO);
- device_set_desc(dev, "PCIBIOS PCI-PCI bridge");
- return (-2000);
- }
- #endif
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